From 8cd8edbe2cb19120cd43fd1647d3bfd489aec6c7 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Thu, 7 Jun 2018 12:23:40 -0700
Subject: [PATCH 01/37] Allow generic rest parameters and infer tuples when
 possible

---
 src/compiler/checker.ts | 332 +++++++++++++++++++++++++---------------
 1 file changed, 212 insertions(+), 120 deletions(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index aabeffd151327..32fdd9e7223d8 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -7186,7 +7186,7 @@ namespace ts {
                 const signature = getSignatureFromDeclaration(node.parent);
                 const parameterIndex = node.parent.parameters.indexOf(node);
                 Debug.assert(parameterIndex >= 0);
-                return parameterIndex >= signature.minArgumentCount;
+                return parameterIndex >= getMinArgumentCount(signature);
             }
             const iife = getImmediatelyInvokedFunctionExpression(node.parent);
             if (iife) {
@@ -7538,14 +7538,9 @@ namespace ts {
             return !signature.resolvedReturnType && findResolutionCycleStartIndex(signature, TypeSystemPropertyName.ResolvedReturnType) >= 0;
         }
 
-        function getRestTypeOfSignature(signature: Signature): Type {
-            if (signature.hasRestParameter) {
-                const type = getTypeOfSymbol(last(signature.parameters));
-                if (getObjectFlags(type) & ObjectFlags.Reference && (<TypeReference>type).target === globalArrayType) {
-                    return (<TypeReference>type).typeArguments![0];
-                }
-            }
-            return anyType;
+        function getRestTypeOfSignature(signature: Signature) {
+            let type = getTypeOfRestParameter(signature);
+            return type && getIndexTypeOfType(type, IndexKind.Number) || anyType;
         }
 
         function getSignatureInstantiation(signature: Signature, typeArguments: Type[] | undefined, isJavascript: boolean): Signature {
@@ -10102,7 +10097,11 @@ namespace ts {
             if (source === target) {
                 return Ternary.True;
             }
-            if (!target.hasRestParameter && source.minArgumentCount > target.parameters.length) {
+
+            const sourceCount = getParameterCount(source);
+            const targetCount = getParameterCount(target);
+
+            if (!hasEffectiveRestParameter(target) && getMinArgumentCount(source) > targetCount) {
                 return Ternary.False;
             }
 
@@ -10133,14 +10132,20 @@ namespace ts {
                 }
             }
 
-            const sourceMax = getNumNonRestParameters(source);
-            const targetMax = getNumNonRestParameters(target);
-            const checkCount = getNumParametersToCheckForSignatureRelatability(source, sourceMax, target, targetMax);
-            const sourceParams = source.parameters;
-            const targetParams = target.parameters;
-            for (let i = 0; i < checkCount; i++) {
-                const sourceType = i < sourceMax ? getTypeOfParameter(sourceParams[i]) : getRestTypeOfSignature(source);
-                const targetType = i < targetMax ? getTypeOfParameter(targetParams[i]) : getRestTypeOfSignature(target);
+            const paramCount = Math.max(sourceCount, targetCount);
+            for (let i = 0; i < paramCount; i++) {
+                let targetType;
+                let sourceType = getGenericRestTypeAtPosition(source, i);
+                if (sourceType) {
+                    targetType = getGenericRestTypeAtPosition(target, i);
+                    if (!targetType) {
+                        return Ternary.False;
+                    }
+                }
+                else {
+                    sourceType = getTypeAtPosition(source, i);
+                    targetType = getTypeAtPosition(target, i);
+                }
                 // In order to ensure that any generic type Foo<T> is at least co-variant with respect to T no matter
                 // how Foo uses T, we need to relate parameters bi-variantly (given that parameters are input positions,
                 // they naturally relate only contra-variantly). However, if the source and target parameters both have
@@ -10160,8 +10165,7 @@ namespace ts {
                 if (!related) {
                     if (reportErrors) {
                         errorReporter!(Diagnostics.Types_of_parameters_0_and_1_are_incompatible,
-                            symbolName(sourceParams[i < sourceMax ? i : sourceMax]),
-                            symbolName(targetParams[i < targetMax ? i : targetMax]));
+                            getParameterNameAtPosition(source, i), getParameterNameAtPosition(target, i));
                     }
                     return Ternary.False;
                 }
@@ -10255,32 +10259,6 @@ namespace ts {
             return false;
         }
 
-        function getNumNonRestParameters(signature: Signature) {
-            const numParams = signature.parameters.length;
-            return signature.hasRestParameter ?
-                numParams - 1 :
-                numParams;
-        }
-
-        function getNumParametersToCheckForSignatureRelatability(source: Signature, sourceNonRestParamCount: number, target: Signature, targetNonRestParamCount: number) {
-            if (source.hasRestParameter === target.hasRestParameter) {
-                if (source.hasRestParameter) {
-                    // If both have rest parameters, get the max and add 1 to
-                    // compensate for the rest parameter.
-                    return Math.max(sourceNonRestParamCount, targetNonRestParamCount) + 1;
-                }
-                else {
-                    return Math.min(sourceNonRestParamCount, targetNonRestParamCount);
-                }
-            }
-            else {
-                // Return the count for whichever signature doesn't have rest parameters.
-                return source.hasRestParameter ?
-                    targetNonRestParamCount :
-                    sourceNonRestParamCount;
-            }
-        }
-
         function isEmptyResolvedType(t: ResolvedType) {
             return t.properties.length === 0 &&
                 t.callSignatures.length === 0 &&
@@ -11798,21 +11776,27 @@ namespace ts {
         }
 
         function isMatchingSignature(source: Signature, target: Signature, partialMatch: boolean) {
+            const sourceParameterCount = getParameterCount(source);
+            const targetParameterCount = getParameterCount(target);
+            const sourceMinArgumentCount = getMinArgumentCount(source);
+            const targetMinArgumentCount = getMinArgumentCount(target);
+            const sourceHasRestParameter = hasEffectiveRestParameter(source);
+            const targetHasRestParameter = hasEffectiveRestParameter(target);
             // A source signature matches a target signature if the two signatures have the same number of required,
             // optional, and rest parameters.
-            if (source.parameters.length === target.parameters.length &&
-                source.minArgumentCount === target.minArgumentCount &&
-                source.hasRestParameter === target.hasRestParameter) {
+            if (sourceParameterCount === targetParameterCount &&
+                sourceMinArgumentCount === targetMinArgumentCount &&
+                sourceHasRestParameter === targetHasRestParameter) {
                 return true;
             }
             // A source signature partially matches a target signature if the target signature has no fewer required
             // parameters and no more overall parameters than the source signature (where a signature with a rest
             // parameter is always considered to have more overall parameters than one without).
-            const sourceRestCount = source.hasRestParameter ? 1 : 0;
-            const targetRestCount = target.hasRestParameter ? 1 : 0;
-            if (partialMatch && source.minArgumentCount <= target.minArgumentCount && (
+            const sourceRestCount = sourceHasRestParameter ? 1 : 0;
+            const targetRestCount = targetHasRestParameter ? 1 : 0;
+            if (partialMatch && sourceMinArgumentCount <= targetMinArgumentCount && (
                 sourceRestCount > targetRestCount ||
-                sourceRestCount === targetRestCount && source.parameters.length >= target.parameters.length)) {
+                sourceRestCount === targetRestCount && sourceParameterCount >= targetParameterCount)) {
                 return true;
             }
             return false;
@@ -11857,10 +11841,10 @@ namespace ts {
                 }
             }
 
-            const targetLen = target.parameters.length;
+            const targetLen = getParameterCount(target);
             for (let i = 0; i < targetLen; i++) {
-                const s = isRestParameterIndex(source, i) ? getRestTypeOfSignature(source) : getTypeOfParameter(source.parameters[i]);
-                const t = isRestParameterIndex(target, i) ? getRestTypeOfSignature(target) : getTypeOfParameter(target.parameters[i]);
+                const s = getTypeAtPosition(source, i);
+                const t = getTypeAtPosition(target, i);
                 const related = compareTypes(s, t);
                 if (!related) {
                     return Ternary.False;
@@ -11882,10 +11866,6 @@ namespace ts {
             return source === undefined || target === undefined || !typePredicateKindsMatch(source, target) ? Ternary.False : compareTypes(source.type, target.type);
         }
 
-        function isRestParameterIndex(signature: Signature, parameterIndex: number) {
-            return signature.hasRestParameter && parameterIndex >= signature.parameters.length - 1;
-        }
-
         function literalTypesWithSameBaseType(types: Type[]): boolean {
             let commonBaseType: Type | undefined;
             for (const t of types) {
@@ -12331,22 +12311,24 @@ namespace ts {
         }
 
         function forEachMatchingParameterType(source: Signature, target: Signature, callback: (s: Type, t: Type) => void) {
-            const sourceMax = source.parameters.length;
-            const targetMax = target.parameters.length;
-            let count: number;
-            if (source.hasRestParameter && target.hasRestParameter) {
-                count = Math.max(sourceMax, targetMax);
-            }
-            else if (source.hasRestParameter) {
-                count = targetMax;
-            }
-            else if (target.hasRestParameter) {
-                count = sourceMax;
-            }
-            else {
-                count = Math.min(sourceMax, targetMax);
-            }
-            for (let i = 0; i < count; i++) {
+            const sourceCount = getParameterCount(source);
+            for (let i = 0; i < sourceCount; i++) {
+                const targetRest = getGenericRestTypeAtPosition(target, i);
+                if (targetRest) {
+                    const sourceRest = getTypeOfRestParameter(source);
+                    if (sourceRest && i === source.parameters.length - 1) {
+                        callback(sourceRest, targetRest);
+                    }
+                    else {
+                        const types: Type[] = [];
+                        for (let j = i; j < sourceCount; j++) {
+                            types.push(getTypeAtPosition(source, j));
+                        }
+                        const rest = !sourceRest || isTupleType(sourceRest) ? createTupleType(types) : createArrayType(getUnionType(types));
+                        callback(rest, targetRest);
+                    }
+                    break;
+                }
                 callback(getTypeAtPosition(source, i), getTypeAtPosition(target, i));
             }
         }
@@ -15155,9 +15137,10 @@ namespace ts {
 
                 // If last parameter is contextually rest parameter get its type
                 if (funcHasRestParameters &&
-                    indexOfParameter === (func.parameters.length - 1) &&
-                    isRestParameterIndex(contextualSignature, func.parameters.length - 1)) {
-                    return getTypeOfSymbol(last(contextualSignature.parameters));
+                    indexOfParameter === func.parameters.length - 1 &&
+                    hasEffectiveRestParameter(contextualSignature) &&
+                    func.parameters.length >= contextualSignature.parameters.length) {
+                    return getTypeOfRestParameter(contextualSignature);
                 }
             }
         }
@@ -15721,8 +15704,7 @@ namespace ts {
             if (target.parameters.length && parameterIsThisKeyword(target.parameters[0])) {
                 targetParameterCount--;
             }
-            const sourceLength = signature.hasRestParameter ? Number.MAX_VALUE : signature.parameters.length;
-            return sourceLength < targetParameterCount;
+            return !hasEffectiveRestParameter(signature) && getParameterCount(signature) < targetParameterCount;
         }
 
         function isFunctionExpressionOrArrowFunction(node: Node): node is FunctionExpression | ArrowFunction {
@@ -17713,8 +17695,7 @@ namespace ts {
                 if (!node.arguments) {
                     // This only happens when we have something of the form: 'new C'
                     Debug.assert(node.kind === SyntaxKind.NewExpression);
-
-                    return signature.minArgumentCount === 0;
+                    return getMinArgumentCount(signature) === 0;
                 }
 
                 argCount = signatureHelpTrailingComma ? args.length + 1 : args.length;
@@ -17732,17 +17713,16 @@ namespace ts {
 
             // If a spread argument is present, check that it corresponds to a rest parameter or at least that it's in the valid range.
             if (spreadArgIndex >= 0) {
-                return isRestParameterIndex(signature, spreadArgIndex) ||
-                    signature.minArgumentCount <= spreadArgIndex && spreadArgIndex < signature.parameters.length;
+                return spreadArgIndex >= getMinArgumentCount(signature) && (hasEffectiveRestParameter(signature) || spreadArgIndex < getParameterCount(signature));
             }
 
             // Too many arguments implies incorrect arity.
-            if (!signature.hasRestParameter && argCount > signature.parameters.length) {
+            if (!hasEffectiveRestParameter(signature) && argCount > getParameterCount(signature)) {
                 return false;
             }
 
             // If the call is incomplete, we should skip the lower bound check.
-            const hasEnoughArguments = argCount >= signature.minArgumentCount;
+            const hasEnoughArguments = argCount >= getMinArgumentCount(signature);
             return callIsIncomplete || hasEnoughArguments;
         }
 
@@ -17848,18 +17828,26 @@ namespace ts {
                 const arg = getEffectiveArgument(node, args, i);
                 // If the effective argument is 'undefined', then it is an argument that is present but is synthetic.
                 if (arg === undefined || arg.kind !== SyntaxKind.OmittedExpression) {
-                    const paramType = getTypeAtPosition(signature, i);
+                    let paramType = getTypeAtPosition(signature, i);
                     let argType = getEffectiveArgumentType(node, i);
-
                     // If the effective argument type is 'undefined', there is no synthetic type
                     // for the argument. In that case, we should check the argument.
                     if (argType === undefined) {
-                        // For context sensitive arguments we pass the identityMapper, which is a signal to treat all
-                        // context sensitive function expressions as wildcards
-                        const mapper = excludeArgument && excludeArgument[i] !== undefined ? identityMapper : context;
-                        argType = checkExpressionWithContextualType(arg!, paramType, mapper);
+                        const restType = getGenericRestTypeAtPosition(signature, i);
+                        if (!restType) {
+                            // For context sensitive arguments we pass the identityMapper, which is a signal to treat all
+                            // context sensitive function expressions as wildcards
+                            const mapper = excludeArgument && excludeArgument[i] !== undefined ? identityMapper : context;
+                            argType = checkExpressionWithContextualType(arg!, paramType, mapper);
+                        }
+                        else {
+                            // The parameter list ends in a rest parameter with a generic type. We consume the remainder
+                            // of the argument list an infer a tuple type or an array type.
+                            argType = inferGenericRestType(signature, args, context);
+                            paramType = restType;
+                            i = argCount;
+                        }
                     }
-
                     inferTypes(context.inferences, argType, paramType);
                 }
             }
@@ -17872,7 +17860,7 @@ namespace ts {
             if (excludeArgument) {
                 for (let i = 0; i < argCount; i++) {
                     // No need to check for omitted args and template expressions, their exclusion value is always undefined
-                    if (excludeArgument[i] === false) {
+                    if (excludeArgument[i] === false && !getGenericRestTypeAtPosition(signature, i)) {
                         const arg = args[i];
                         const paramType = getTypeAtPosition(signature, i);
                         inferTypes(context.inferences, checkExpressionWithContextualType(arg, paramType, context), paramType);
@@ -17882,6 +17870,26 @@ namespace ts {
             return getInferredTypes(context);
         }
 
+        function inferGenericRestType(signature: Signature, args: ReadonlyArray<Expression>, context: InferenceContext): Type {
+            const startIndex = signature.parameters.length - 1;
+            if (args[startIndex].kind === SyntaxKind.SpreadElement && args.length === startIndex + 1) {
+                // We are inferring from a spread expression in the last argument position, i.e. both the parameter
+                // and the argument are ...x forms.
+                return checkExpressionWithContextualType((<SpreadElement>args[startIndex]).expression, getTypeOfRestParameter(signature)!, context);
+            }
+            const contextualType = getTypeAtPosition(signature, startIndex);
+            const types: Type[] = [];
+            let hasSpreadExpression = false;
+            for (let i = startIndex; i < args.length; i++) {
+                const arg = args[i];
+                types.push(checkExpressionWithContextualType(arg, contextualType, context));
+                hasSpreadExpression = hasSpreadExpression || arg.kind === SyntaxKind.SpreadElement;
+            }
+            // If none of the remaining arguments are spread expressions, infer a tuple type. Otherwise, infer
+            // an array type.
+            return hasSpreadExpression ? createArrayType(getUnionType(types)) : createTupleType(types);
+        }
+
         function checkTypeArguments(signature: Signature, typeArgumentNodes: ReadonlyArray<TypeNode>, reportErrors: boolean, headMessage?: DiagnosticMessage): Type[] | false {
             const isJavascript = isInJavaScriptFile(signature.declaration);
             const typeParameters = signature.typeParameters!;
@@ -17973,20 +17981,30 @@ namespace ts {
                 const arg = getEffectiveArgument(node, args, i);
                 // If the effective argument is 'undefined', then it is an argument that is present but is synthetic.
                 if (arg === undefined || arg.kind !== SyntaxKind.OmittedExpression) {
-                    // Check spread elements against rest type (from arity check we know spread argument corresponds to a rest parameter)
-                    const paramType = getTypeAtPosition(signature, i);
-                    // If the effective argument type is undefined, there is no synthetic type for the argument.
-                    // In that case, we should check the argument.
-                    const argType = getEffectiveArgumentType(node, i) ||
-                        checkExpressionWithContextualType(arg!, paramType, excludeArgument && excludeArgument[i] ? identityMapper : undefined);
-                    // If one or more arguments are still excluded (as indicated by a non-null excludeArgument parameter),
-                    // we obtain the regular type of any object literal arguments because we may not have inferred complete
-                    // parameter types yet and therefore excess property checks may yield false positives (see #17041).
-                    const checkArgType = excludeArgument ? getRegularTypeOfObjectLiteral(argType) : argType;
-                    // Use argument expression as error location when reporting errors
-                    const errorNode = reportErrors ? getEffectiveArgumentErrorNode(node, i, arg) : undefined;
-                    if (!checkTypeRelatedTo(checkArgType, paramType, relation, errorNode, headMessage)) {
-                        return false;
+                    const restType = getTypeOfRestParameter(signature);
+                    if (arg && arg.kind === SyntaxKind.SpreadElement && i === argCount - 1 && restType &&
+                        signature.parameters.length === argCount && !isArrayType(restType)) {
+                        const argType = checkExpressionWithContextualType((<SpreadElement>arg).expression, restType, /*contextualMapper*/ undefined);
+                        if (!checkTypeRelatedTo(argType, restType, relation, arg, headMessage)) {
+                            return false;
+                        }
+                    }
+                    else {
+                        // Check spread elements against rest type (from arity check we know spread argument corresponds to a rest parameter)
+                        const paramType = getTypeAtPosition(signature, i);
+                        // If the effective argument type is undefined, there is no synthetic type for the argument.
+                        // In that case, we should check the argument.
+                        const argType = getEffectiveArgumentType(node, i) ||
+                            checkExpressionWithContextualType(arg!, paramType, excludeArgument && excludeArgument[i] ? identityMapper : undefined);
+                        // If one or more arguments are still excluded (as indicated by a non-null excludeArgument parameter),
+                        // we obtain the regular type of any object literal arguments because we may not have inferred complete
+                        // parameter types yet and therefore excess property checks may yield false positives (see #17041).
+                        const checkArgType = excludeArgument ? getRegularTypeOfObjectLiteral(argType) : argType;
+                        // Use argument expression as error location when reporting errors
+                        const errorNode = reportErrors ? getEffectiveArgumentErrorNode(node, i, arg) : undefined;
+                        if (!checkTypeRelatedTo(checkArgType, paramType, relation, errorNode, headMessage)) {
+                            return false;
+                        }
                     }
                 }
             }
@@ -18460,10 +18478,10 @@ namespace ts {
                 let min = Number.POSITIVE_INFINITY;
                 let max = Number.NEGATIVE_INFINITY;
                 for (const sig of signatures) {
-                    min = Math.min(min, sig.minArgumentCount);
-                    max = Math.max(max, sig.parameters.length);
+                    min = Math.min(min, getMinArgumentCount(sig));
+                    max = Math.max(max, getParameterCount(sig));
                 }
-                const hasRestParameter = some(signatures, sig => sig.hasRestParameter);
+                const hasRestParameter = some(signatures, hasEffectiveRestParameter);
                 const hasSpreadArgument = getSpreadArgumentIndex(args) > -1;
                 const paramCount = hasRestParameter ? min :
                     min < max ? min + "-" + max :
@@ -18590,11 +18608,12 @@ namespace ts {
 
             for (let i = 0; i < candidates.length; i++) {
                 const candidate = candidates[i];
-                if (candidate.hasRestParameter || candidate.parameters.length >= argsCount) {
+                const paramCount = getParameterCount(candidate);
+                if (hasEffectiveRestParameter(candidate) || paramCount >= argsCount) {
                     return i;
                 }
-                if (candidate.parameters.length > maxParams) {
-                    maxParams = candidate.parameters.length;
+                if (paramCount > maxParams) {
+                    maxParams = paramCount;
                     maxParamsIndex = i;
                 }
             }
@@ -19321,12 +19340,81 @@ namespace ts {
             return type;
         }
 
+        function getParameterNameAtPosition(signature: Signature, pos: number) {
+            const paramCount = signature.parameters.length - (signature.hasRestParameter ? 1 : 0);
+            if (pos < paramCount) {
+                return symbolName(signature.parameters[pos]);
+            }
+            const restParameter = signature.parameters[paramCount] || unknownSymbol;
+            const restName = symbolName(restParameter);
+            return isTupleType(getTypeOfSymbol(restParameter)) ? `${restName}[${pos - paramCount}]` : restName;
+        }
+
         function getTypeAtPosition(signature: Signature, pos: number): Type {
-            return signature.hasRestParameter ?
-                pos < signature.parameters.length - 1 ? getTypeOfParameter(signature.parameters[pos]) : getRestTypeOfSignature(signature) :
-                pos < signature.parameters.length ? getTypeOfParameter(signature.parameters[pos]) : anyType;
+            const paramCount = signature.parameters.length - (signature.hasRestParameter ? 1 : 0);
+            if (pos < paramCount) {
+                return getTypeOfParameter(signature.parameters[pos]);
+            }
+            if (signature.hasRestParameter) {
+                const restType = getTypeOfSymbol(signature.parameters[paramCount]);
+                if (isTupleType(restType)) {
+                    const elementCount = ((<TypeReference>restType).typeArguments || emptyArray).length;
+                    if (pos - paramCount < elementCount) {
+                        return (<TypeReference>restType).typeArguments![pos - paramCount];
+                    }
+                }
+                return getIndexTypeOfType(restType, IndexKind.Number) || anyType;
+            }
+            return anyType;
+        }
+
+        function getGenericRestTypeAtPosition(signature: Signature, pos: number) {
+            if (signature.hasRestParameter) {
+                const restIndex = signature.parameters.length - 1;
+                if (pos >= restIndex) {
+                    const restType = getTypeOfSymbol(signature.parameters[restIndex]);
+                    if (restType.flags & TypeFlags.TypeParameter) {
+                        return restType;
+                    }
+                }
+            }
+            return undefined;
         }
 
+        function getTypeOfRestParameter(signature: Signature) {
+            return signature.hasRestParameter ? getTypeOfSymbol(signature.parameters[signature.parameters.length - 1]) : undefined;
+        }
+
+        function getParameterCount(signature: Signature) {
+            const length = signature.parameters.length;
+            if (signature.hasRestParameter) {
+                const restType = getTypeOfSymbol(signature.parameters[length - 1]);
+                if (isTupleType(restType)) {
+                    return length + ((<TypeReference>restType).typeArguments || emptyArray).length - 1;
+                }
+            }
+            return length;
+        }
+
+        function getMinArgumentCount(signature: Signature) {
+            const restType = getTypeOfRestParameter(signature);
+            if (restType && isTupleType(restType)) {
+                const elementTypes = (<TypeReference>restType).typeArguments || emptyArray;
+                let index = elementTypes.length;
+                while (index > 0) {
+                    --index;
+                    // TODO: Revise this once we have proper support for optional tuple elements
+                    if (!maybeTypeOfKind(elementTypes[index], TypeFlags.Undefined)) {
+                        return signature.parameters.length + index;
+                    }
+                }
+            }
+            return signature.minArgumentCount;
+        }
+
+        function hasEffectiveRestParameter(signature: Signature) {
+            return signature.hasRestParameter && !isTupleType(getTypeOfSymbol(signature.parameters[signature.parameters.length - 1]));
+        }
 
         function getTypeOfFirstParameterOfSignature(signature: Signature) {
             return getTypeOfFirstParameterOfSignatureWithFallback(signature, neverType);
@@ -19368,7 +19456,7 @@ namespace ts {
                     assignTypeToParameterAndFixTypeParameters(parameter, contextualParameterType);
                 }
             }
-            if (signature.hasRestParameter && isRestParameterIndex(context, signature.parameters.length - 1)) {
+            if (signature.hasRestParameter && context.hasRestParameter && signature.parameters.length >= context.parameters.length) {
                 // parameter might be a transient symbol generated by use of `arguments` in the function body.
                 const parameter = last(signature.parameters);
                 if (isTransientSymbol(parameter) || !getEffectiveTypeAnnotationNode(<ParameterDeclaration>parameter.valueDeclaration)) {
@@ -20930,6 +21018,10 @@ namespace ts {
             }
         }
 
+        function isRestParameterType(type: Type) {
+            return isArrayType(type) || type.flags & TypeFlags.TypeParameter && isArrayType(getConstraintOfType(type) || unknownType);
+        }
+
         function checkParameter(node: ParameterDeclaration) {
             // Grammar checking
             // It is a SyntaxError if the Identifier "eval" or the Identifier "arguments" occurs as the
@@ -20958,7 +21050,7 @@ namespace ts {
 
             // Only check rest parameter type if it's not a binding pattern. Since binding patterns are
             // not allowed in a rest parameter, we already have an error from checkGrammarParameterList.
-            if (node.dotDotDotToken && !isBindingPattern(node.name) && !isArrayType(getTypeOfSymbol(node.symbol))) {
+            if (node.dotDotDotToken && !isBindingPattern(node.name) && !isRestParameterType(getTypeOfSymbol(node.symbol))) {
                 error(node, Diagnostics.A_rest_parameter_must_be_of_an_array_type);
             }
         }

From 43bfccfd086085e7732eee425841fe9c6742a7bd Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Thu, 7 Jun 2018 12:24:15 -0700
Subject: [PATCH 02/37] Accept new baselines

---
 .../baselines/reference/iterableArrayPattern25.errors.txt  | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/tests/baselines/reference/iterableArrayPattern25.errors.txt b/tests/baselines/reference/iterableArrayPattern25.errors.txt
index 07f46c0d49ee8..19f2dca07f392 100644
--- a/tests/baselines/reference/iterableArrayPattern25.errors.txt
+++ b/tests/baselines/reference/iterableArrayPattern25.errors.txt
@@ -1,8 +1,11 @@
 tests/cases/conformance/es6/destructuring/iterableArrayPattern25.ts(1,33): error TS2501: A rest element cannot contain a binding pattern.
+tests/cases/conformance/es6/destructuring/iterableArrayPattern25.ts(2,1): error TS2554: Expected 2 arguments, but got 1.
 
 
-==== tests/cases/conformance/es6/destructuring/iterableArrayPattern25.ts (1 errors) ====
+==== tests/cases/conformance/es6/destructuring/iterableArrayPattern25.ts (2 errors) ====
     function takeFirstTwoEntries(...[[k1, v1], [k2, v2]]) { }
                                     ~~~~~~~~~~~~~~~~~~~~
 !!! error TS2501: A rest element cannot contain a binding pattern.
-    takeFirstTwoEntries(new Map([["", 0], ["hello", 1]]));
\ No newline at end of file
+    takeFirstTwoEntries(new Map([["", 0], ["hello", 1]]));
+    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+!!! error TS2554: Expected 2 arguments, but got 1.
\ No newline at end of file

From 2e04322a6da1472c4bb9d048a4d4431f88baea79 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Sat, 9 Jun 2018 12:19:11 -0700
Subject: [PATCH 03/37] Optional elements in tuple types + empty tuple types +
 other fixes.

---
 src/compiler/binder.ts               |   1 +
 src/compiler/checker.ts              | 287 ++++++++++++++-------------
 src/compiler/diagnosticMessages.json |   4 -
 src/compiler/emitter.ts              |   7 +
 src/compiler/factory.ts              |  14 +-
 src/compiler/parser.ts               |  31 +--
 src/compiler/transformers/ts.ts      |   1 +
 src/compiler/types.ts                |  10 +
 src/compiler/visitor.ts              |   6 +-
 9 files changed, 204 insertions(+), 157 deletions(-)

diff --git a/src/compiler/binder.ts b/src/compiler/binder.ts
index 8b6ff01dd2038..3b0104c1b7f6a 100644
--- a/src/compiler/binder.ts
+++ b/src/compiler/binder.ts
@@ -3601,6 +3601,7 @@ namespace ts {
             case SyntaxKind.TypeLiteral:
             case SyntaxKind.ArrayType:
             case SyntaxKind.TupleType:
+            case SyntaxKind.OptionalType:
             case SyntaxKind.UnionType:
             case SyntaxKind.IntersectionType:
             case SyntaxKind.ConditionalType:
diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 32fdd9e7223d8..98c1f5c8a962b 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -352,7 +352,7 @@ namespace ts {
             }
         };
 
-        const tupleTypes: GenericType[] = [];
+        const tupleTypes = createMap<GenericType>();
         const unionTypes = createMap<UnionType>();
         const intersectionTypes = createMap<IntersectionType>();
         const literalTypes = createMap<LiteralType>();
@@ -3396,8 +3396,12 @@ namespace ts {
                     }
                     else if (type.target.objectFlags & ObjectFlags.Tuple) {
                         if (typeArguments.length > 0) {
-                            const tupleConstituentNodes = mapToTypeNodes(typeArguments.slice(0, getTypeReferenceArity(type)), context);
+                            const arity = getTypeReferenceArity(type);
+                            const tupleConstituentNodes = mapToTypeNodes(typeArguments.slice(0, arity), context);
                             if (tupleConstituentNodes && tupleConstituentNodes.length > 0) {
+                                for (let i = (<TupleType>type.target).minLength; i < arity; i++) {
+                                    tupleConstituentNodes[i] = createOptionalTypeNode(tupleConstituentNodes[i]);
+                                }
                                 return createTupleTypeNode(tupleConstituentNodes);
                             }
                         }
@@ -5406,7 +5410,7 @@ namespace ts {
         function getBaseTypes(type: InterfaceType): BaseType[] {
             if (!type.resolvedBaseTypes) {
                 if (type.objectFlags & ObjectFlags.Tuple) {
-                    type.resolvedBaseTypes = [createArrayType(getUnionType(type.typeParameters!))];
+                    type.resolvedBaseTypes = [createArrayType(getUnionType(type.typeParameters || emptyArray))];
                 }
                 else if (type.symbol.flags & (SymbolFlags.Class | SymbolFlags.Interface)) {
                     if (type.symbol.flags & SymbolFlags.Class) {
@@ -7663,32 +7667,40 @@ namespace ts {
             let inferences: Type[] | undefined;
             if (typeParameter.symbol) {
                 for (const declaration of typeParameter.symbol.declarations) {
-                    // When an 'infer T' declaration is immediately contained in a type reference node
-                    // (such as 'Foo<infer T>'), T's constraint is inferred from the constraint of the
-                    // corresponding type parameter in 'Foo'. When multiple 'infer T' declarations are
-                    // present, we form an intersection of the inferred constraint types.
-                    if (declaration.parent.kind === SyntaxKind.InferType && declaration.parent.parent.kind === SyntaxKind.TypeReference) {
-                        const typeReference = <TypeReferenceNode>declaration.parent.parent;
-                        const typeParameters = getTypeParametersForTypeReference(typeReference);
-                        if (typeParameters) {
-                            const index = typeReference.typeArguments!.indexOf(<TypeNode>declaration.parent);
-                            if (index < typeParameters.length) {
-                                const declaredConstraint = getConstraintOfTypeParameter(typeParameters[index]);
-                                if (declaredConstraint) {
-                                    // Type parameter constraints can reference other type parameters so
-                                    // constraints need to be instantiated. If instantiation produces the
-                                    // type parameter itself, we discard that inference. For example, in
-                                    //   type Foo<T extends string, U extends T> = [T, U];
-                                    //   type Bar<T> = T extends Foo<infer X, infer X> ? Foo<X, X> : T;
-                                    // the instantiated constraint for U is X, so we discard that inference.
-                                    const mapper = createTypeMapper(typeParameters, getEffectiveTypeArguments(typeReference, typeParameters));
-                                    const constraint = instantiateType(declaredConstraint, mapper);
-                                    if (constraint !== typeParameter) {
-                                        inferences = append(inferences, constraint);
+                    if (declaration.parent.kind === SyntaxKind.InferType) {
+                        // When an 'infer T' declaration is immediately contained in a type reference node
+                        // (such as 'Foo<infer T>'), T's constraint is inferred from the constraint of the
+                        // corresponding type parameter in 'Foo'. When multiple 'infer T' declarations are
+                        // present, we form an intersection of the inferred constraint types.
+                        const grandParent = declaration.parent.parent;
+                        if (grandParent.kind === SyntaxKind.TypeReference) {
+                            const typeReference = <TypeReferenceNode>grandParent;
+                            const typeParameters = getTypeParametersForTypeReference(typeReference);
+                            if (typeParameters) {
+                                const index = typeReference.typeArguments!.indexOf(<TypeNode>declaration.parent);
+                                if (index < typeParameters.length) {
+                                    const declaredConstraint = getConstraintOfTypeParameter(typeParameters[index]);
+                                    if (declaredConstraint) {
+                                        // Type parameter constraints can reference other type parameters so
+                                        // constraints need to be instantiated. If instantiation produces the
+                                        // type parameter itself, we discard that inference. For example, in
+                                        //   type Foo<T extends string, U extends T> = [T, U];
+                                        //   type Bar<T> = T extends Foo<infer X, infer X> ? Foo<X, X> : T;
+                                        // the instantiated constraint for U is X, so we discard that inference.
+                                        const mapper = createTypeMapper(typeParameters, getEffectiveTypeArguments(typeReference, typeParameters));
+                                        const constraint = instantiateType(declaredConstraint, mapper);
+                                        if (constraint !== typeParameter) {
+                                            inferences = append(inferences, constraint);
+                                        }
                                     }
                                 }
                             }
                         }
+                        // When an 'infer T' declaration is immediately contained in a rest parameter
+                        // declaration, we infer an 'unknown[]' constraint.
+                        else if (grandParent.kind === SyntaxKind.Parameter && (<ParameterDeclaration>grandParent).dotDotDotToken) {
+                            inferences = append(inferences, createArrayType(unknownType));
+                        }
                     }
                 }
             }
@@ -8242,20 +8254,23 @@ namespace ts {
         //
         // Note that the generic type created by this function has no symbol associated with it. The same
         // is true for each of the synthesized type parameters.
-        function createTupleTypeOfArity(arity: number): GenericType {
-            const typeParameters: TypeParameter[] = [];
+        function createTupleTypeOfArity(arity: number, minLength: number): TupleType {
+            let typeParameters: TypeParameter[] | undefined;
             const properties: Symbol[] = [];
-            for (let i = 0; i < arity; i++) {
-                const typeParameter = <TypeParameter>createType(TypeFlags.TypeParameter);
-                typeParameters.push(typeParameter);
-                const property = createSymbol(SymbolFlags.Property, "" + i as __String);
-                property.type = typeParameter;
-                properties.push(property);
+            if (arity) {
+                typeParameters = new Array(arity);
+                for (let i = 0; i < arity; i++) {
+                    const property = createSymbol(SymbolFlags.Property | (i >= minLength ? SymbolFlags.Optional : 0), "" + i as __String);
+                    property.type = typeParameters[i] = <TypeParameter>createType(TypeFlags.TypeParameter);
+                    properties.push(property);
+                }
             }
+            const literalTypes = [];
+            for (let i = minLength; i <= arity; i++) literalTypes.push(getLiteralType(i));
             const lengthSymbol = createSymbol(SymbolFlags.Property, "length" as __String);
-            lengthSymbol.type = getLiteralType(arity);
+            lengthSymbol.type = getUnionType(literalTypes);
             properties.push(lengthSymbol);
-            const type = <GenericType & InterfaceTypeWithDeclaredMembers>createObjectType(ObjectFlags.Tuple | ObjectFlags.Reference);
+            const type = <TupleType & InterfaceTypeWithDeclaredMembers>createObjectType(ObjectFlags.Tuple | ObjectFlags.Reference);
             type.typeParameters = typeParameters;
             type.outerTypeParameters = undefined;
             type.localTypeParameters = typeParameters;
@@ -8271,25 +8286,38 @@ namespace ts {
             type.declaredConstructSignatures = emptyArray;
             type.declaredStringIndexInfo = undefined;
             type.declaredNumberIndexInfo = undefined;
+            type.minLength = minLength;
             return type;
         }
 
-        function getTupleTypeOfArity(arity: number): GenericType {
-            return tupleTypes[arity] || (tupleTypes[arity] = createTupleTypeOfArity(arity));
+        function getTupleTypeOfArity(arity: number, minLength: number): GenericType {
+            const key = arity + "," + minLength;
+            let type = tupleTypes.get(key);
+            if (!type) {
+                tupleTypes.set(key, type = createTupleTypeOfArity(arity, minLength));
+            }
+            return type;
         }
 
-        function createTupleType(elementTypes: Type[]) {
-            return createTypeReference(getTupleTypeOfArity(elementTypes.length), elementTypes);
+        function createTupleType(elementTypes: Type[], minLength = elementTypes.length) {
+            const tupleType = getTupleTypeOfArity(elementTypes.length, minLength);
+            return elementTypes.length ? createTypeReference(tupleType, elementTypes) : tupleType;
         }
 
         function getTypeFromTupleTypeNode(node: TupleTypeNode): Type {
             const links = getNodeLinks(node);
             if (!links.resolvedType) {
-                links.resolvedType = createTupleType(map(node.elementTypes, getTypeFromTypeNode));
+                const minLength = findLastIndex(node.elementTypes, n => n.kind !== SyntaxKind.OptionalType) + 1;
+                links.resolvedType = createTupleType(map(node.elementTypes, getTypeFromTypeNode), minLength);
             }
             return links.resolvedType;
         }
 
+        function getTypeFromOptionalTypeNode(node: OptionalTypeNode): Type {
+            const type = getTypeFromTypeNode(node.type);
+            return strictNullChecks ? getOptionalType(type) : type;
+        }
+
         function getTypeId(type: Type) {
             return type.id;
         }
@@ -9480,6 +9508,8 @@ namespace ts {
                     return getTypeFromArrayTypeNode(<ArrayTypeNode>node);
                 case SyntaxKind.TupleType:
                     return getTypeFromTupleTypeNode(<TupleTypeNode>node);
+                case SyntaxKind.OptionalType:
+                    return getTypeFromOptionalTypeNode(<OptionalTypeNode>node);
                 case SyntaxKind.UnionType:
                     return getTypeFromUnionTypeNode(<UnionTypeNode>node);
                 case SyntaxKind.IntersectionType:
@@ -10100,11 +10130,16 @@ namespace ts {
 
             const sourceCount = getParameterCount(source);
             const targetCount = getParameterCount(target);
-
             if (!hasEffectiveRestParameter(target) && getMinArgumentCount(source) > targetCount) {
                 return Ternary.False;
             }
 
+            const sourceRestTypeParameter = getRestTypeParameter(source);
+            const targetRestTypeParameter = sourceRestTypeParameter ? getRestTypeParameter(target) : undefined;
+            if (sourceRestTypeParameter && !(targetRestTypeParameter && sourceCount === targetCount)) {
+                return Ternary.False;
+            }
+
             if (source.typeParameters && source.typeParameters !== target.typeParameters) {
                 target = getCanonicalSignature(target);
                 source = instantiateSignatureInContextOf(source, target, /*contextualMapper*/ undefined, compareTypes);
@@ -10133,19 +10168,10 @@ namespace ts {
             }
 
             const paramCount = Math.max(sourceCount, targetCount);
+            const lastIndex = paramCount - 1;
             for (let i = 0; i < paramCount; i++) {
-                let targetType;
-                let sourceType = getGenericRestTypeAtPosition(source, i);
-                if (sourceType) {
-                    targetType = getGenericRestTypeAtPosition(target, i);
-                    if (!targetType) {
-                        return Ternary.False;
-                    }
-                }
-                else {
-                    sourceType = getTypeAtPosition(source, i);
-                    targetType = getTypeAtPosition(target, i);
-                }
+                const sourceType = i === lastIndex && sourceRestTypeParameter || getTypeAtPosition(source, i);
+                const targetType = i === lastIndex && targetRestTypeParameter || getTypeAtPosition(target, i);
                 // In order to ensure that any generic type Foo<T> is at least co-variant with respect to T no matter
                 // how Foo uses T, we need to relate parameters bi-variantly (given that parameters are input positions,
                 // they naturally relate only contra-variantly). However, if the source and target parameters both have
@@ -11921,7 +11947,7 @@ namespace ts {
         }
 
         function isTupleLikeType(type: Type): boolean {
-            return !!getPropertyOfType(type, "0" as __String);
+            return isTupleType(type) || !!getPropertyOfType(type, "0" as __String);
         }
 
         function isNeitherUnitTypeNorNever(type: Type): boolean {
@@ -12312,24 +12338,26 @@ namespace ts {
 
         function forEachMatchingParameterType(source: Signature, target: Signature, callback: (s: Type, t: Type) => void) {
             const sourceCount = getParameterCount(source);
-            for (let i = 0; i < sourceCount; i++) {
-                const targetRest = getGenericRestTypeAtPosition(target, i);
-                if (targetRest) {
-                    const sourceRest = getTypeOfRestParameter(source);
-                    if (sourceRest && i === source.parameters.length - 1) {
-                        callback(sourceRest, targetRest);
-                    }
-                    else {
-                        const types: Type[] = [];
-                        for (let j = i; j < sourceCount; j++) {
-                            types.push(getTypeAtPosition(source, j));
-                        }
-                        const rest = !sourceRest || isTupleType(sourceRest) ? createTupleType(types) : createArrayType(getUnionType(types));
-                        callback(rest, targetRest);
+            const targetRest = getRestTypeParameter(target);
+            const paramCount = targetRest ? Math.min(getParameterCount(target) - 1, sourceCount) : sourceCount;
+            for (let i = 0; i < paramCount; i++) {
+                callback(getTypeAtPosition(source, i), getTypeAtPosition(target, i));
+            }
+            if (targetRest) {
+                const sourceRest = getRestTypeParameter(source);
+                if (sourceRest && paramCount === sourceCount - 1) {
+                    callback(sourceRest, targetRest);
+                }
+                else {
+                    const types: Type[] = [];
+                    for (let i = paramCount; i < sourceCount; i++) {
+                        types.push(getTypeAtPosition(source, i));
                     }
-                    break;
+                    const minArgumentCount = getMinArgumentCount(source);
+                    const minLength = minArgumentCount < paramCount ? 0 : minArgumentCount - paramCount;
+                    const rest = hasEffectiveRestParameter(source) ? createArrayType(getUnionType(types)) : createTupleType(types, minLength);
+                    callback(rest, targetRest);
                 }
-                callback(getTypeAtPosition(source, i), getTypeAtPosition(target, i));
             }
         }
 
@@ -15852,9 +15880,7 @@ namespace ts {
                             }
                         }
                     }
-                    if (elementTypes.length) {
-                        return createTupleType(elementTypes);
-                    }
+                    return createTupleType(elementTypes);
                 }
             }
             return createArrayType(elementTypes.length ?
@@ -17823,7 +17849,9 @@ namespace ts {
 
             // We perform two passes over the arguments. In the first pass we infer from all arguments, but use
             // wildcards for all context sensitive function expressions.
-            const argCount = getEffectiveArgumentCount(node, args, signature);
+            const effectiveArgCount = getEffectiveArgumentCount(node, args, signature);
+            const restTypeParameter = getRestTypeParameter(signature);
+            const argCount = restTypeParameter ? Math.min(getParameterCount(signature) - 1, effectiveArgCount) : effectiveArgCount;
             for (let i = 0; i < argCount; i++) {
                 const arg = getEffectiveArgument(node, args, i);
                 // If the effective argument is 'undefined', then it is an argument that is present but is synthetic.
@@ -17833,25 +17861,20 @@ namespace ts {
                     // If the effective argument type is 'undefined', there is no synthetic type
                     // for the argument. In that case, we should check the argument.
                     if (argType === undefined) {
-                        const restType = getGenericRestTypeAtPosition(signature, i);
-                        if (!restType) {
-                            // For context sensitive arguments we pass the identityMapper, which is a signal to treat all
-                            // context sensitive function expressions as wildcards
-                            const mapper = excludeArgument && excludeArgument[i] !== undefined ? identityMapper : context;
-                            argType = checkExpressionWithContextualType(arg!, paramType, mapper);
-                        }
-                        else {
-                            // The parameter list ends in a rest parameter with a generic type. We consume the remainder
-                            // of the argument list an infer a tuple type or an array type.
-                            argType = inferGenericRestType(signature, args, context);
-                            paramType = restType;
-                            i = argCount;
-                        }
+                        // For context sensitive arguments we pass the identityMapper, which is a signal to treat all
+                        // context sensitive function expressions as wildcards
+                        const mapper = excludeArgument && excludeArgument[i] !== undefined ? identityMapper : context;
+                        argType = checkExpressionWithContextualType(arg!, paramType, mapper);
                     }
                     inferTypes(context.inferences, argType, paramType);
                 }
             }
 
+            if (restTypeParameter) {
+                const spreadType = getSpreadArgumentType(node, args, argCount, effectiveArgCount, restTypeParameter, context);
+                inferTypes(context.inferences, spreadType, restTypeParameter);
+            }
+
             // In the second pass we visit only context sensitive arguments, and only those that aren't excluded, this
             // time treating function expressions normally (which may cause previously inferred type arguments to be fixed
             // as we construct types for contextually typed parameters)
@@ -17860,7 +17883,7 @@ namespace ts {
             if (excludeArgument) {
                 for (let i = 0; i < argCount; i++) {
                     // No need to check for omitted args and template expressions, their exclusion value is always undefined
-                    if (excludeArgument[i] === false && !getGenericRestTypeAtPosition(signature, i)) {
+                    if (excludeArgument[i] === false) {
                         const arg = args[i];
                         const paramType = getTypeAtPosition(signature, i);
                         inferTypes(context.inferences, checkExpressionWithContextualType(arg, paramType, context), paramType);
@@ -17870,23 +17893,26 @@ namespace ts {
             return getInferredTypes(context);
         }
 
-        function inferGenericRestType(signature: Signature, args: ReadonlyArray<Expression>, context: InferenceContext): Type {
-            const startIndex = signature.parameters.length - 1;
-            if (args[startIndex].kind === SyntaxKind.SpreadElement && args.length === startIndex + 1) {
-                // We are inferring from a spread expression in the last argument position, i.e. both the parameter
-                // and the argument are ...x forms.
-                return checkExpressionWithContextualType((<SpreadElement>args[startIndex]).expression, getTypeOfRestParameter(signature)!, context);
+        function getSpreadArgumentType(node: CallLikeExpression, args: ReadonlyArray<Expression>, index: number, argCount: number, restType: TypeParameter, context: InferenceContext | undefined) {
+            if (index === argCount - 1) {
+                const arg = getEffectiveArgument(node, args, index);
+                if (arg && arg.kind === SyntaxKind.SpreadElement) {
+                    // We are inferring from a spread expression in the last argument position, i.e. both the parameter
+                    // and the argument are ...x forms.
+                    return checkExpressionWithContextualType((<SpreadElement>arg).expression, restType, context);
+                }
             }
-            const contextualType = getTypeAtPosition(signature, startIndex);
+            const contextualType = getIndexTypeOfType(restType, IndexKind.Number) || anyType;
             const types: Type[] = [];
             let hasSpreadExpression = false;
-            for (let i = startIndex; i < args.length; i++) {
-                const arg = args[i];
-                types.push(checkExpressionWithContextualType(arg, contextualType, context));
-                hasSpreadExpression = hasSpreadExpression || arg.kind === SyntaxKind.SpreadElement;
+            for (let i = index; i < argCount; i++) {
+                let argType = getEffectiveArgumentType(node, i);
+                if (!argType) {
+                    argType = checkExpressionWithContextualType(args[i], contextualType, context);
+                    hasSpreadExpression = hasSpreadExpression || args[i].kind === SyntaxKind.SpreadElement;
+                }
+                types.push(argType);
             }
-            // If none of the remaining arguments are spread expressions, infer a tuple type. Otherwise, infer
-            // an array type.
             return hasSpreadExpression ? createArrayType(getUnionType(types)) : createTupleType(types);
         }
 
@@ -17977,17 +18003,15 @@ namespace ts {
             }
             const headMessage = Diagnostics.Argument_of_type_0_is_not_assignable_to_parameter_of_type_1;
             const argCount = getEffectiveArgumentCount(node, args, signature);
+            const restIndex = signature.hasRestParameter ? signature.parameters.length - 1 : -1;
+            const restType = restIndex >= 0 ? getTypeOfSymbol(signature.parameters[restIndex]) : anyType;
             for (let i = 0; i < argCount; i++) {
                 const arg = getEffectiveArgument(node, args, i);
                 // If the effective argument is 'undefined', then it is an argument that is present but is synthetic.
                 if (arg === undefined || arg.kind !== SyntaxKind.OmittedExpression) {
-                    const restType = getTypeOfRestParameter(signature);
-                    if (arg && arg.kind === SyntaxKind.SpreadElement && i === argCount - 1 && restType &&
-                        signature.parameters.length === argCount && !isArrayType(restType)) {
-                        const argType = checkExpressionWithContextualType((<SpreadElement>arg).expression, restType, /*contextualMapper*/ undefined);
-                        if (!checkTypeRelatedTo(argType, restType, relation, arg, headMessage)) {
-                            return false;
-                        }
+                    if (i === restIndex && (restType.flags & TypeFlags.TypeParameter || arg && arg.kind === SyntaxKind.SpreadElement && !isArrayType(restType))) {
+                        const spreadType = getSpreadArgumentType(node, args, i, argCount, restType, /*context*/ undefined);
+                        return checkTypeRelatedTo(spreadType, restType, relation, arg, headMessage);
                     }
                     else {
                         // Check spread elements against rest type (from arity check we know spread argument corresponds to a rest parameter)
@@ -18008,7 +18032,6 @@ namespace ts {
                     }
                 }
             }
-
             return true;
         }
 
@@ -19368,19 +19391,6 @@ namespace ts {
             return anyType;
         }
 
-        function getGenericRestTypeAtPosition(signature: Signature, pos: number) {
-            if (signature.hasRestParameter) {
-                const restIndex = signature.parameters.length - 1;
-                if (pos >= restIndex) {
-                    const restType = getTypeOfSymbol(signature.parameters[restIndex]);
-                    if (restType.flags & TypeFlags.TypeParameter) {
-                        return restType;
-                    }
-                }
-            }
-            return undefined;
-        }
-
         function getTypeOfRestParameter(signature: Signature) {
             return signature.hasRestParameter ? getTypeOfSymbol(signature.parameters[signature.parameters.length - 1]) : undefined;
         }
@@ -19399,19 +19409,24 @@ namespace ts {
         function getMinArgumentCount(signature: Signature) {
             const restType = getTypeOfRestParameter(signature);
             if (restType && isTupleType(restType)) {
-                const elementTypes = (<TypeReference>restType).typeArguments || emptyArray;
-                let index = elementTypes.length;
-                while (index > 0) {
-                    --index;
-                    // TODO: Revise this once we have proper support for optional tuple elements
-                    if (!maybeTypeOfKind(elementTypes[index], TypeFlags.Undefined)) {
-                        return signature.parameters.length + index;
-                    }
+                const minLength = (<TupleType>(<TypeReference>restType).target).minLength;
+                if (minLength > 0) {
+                    return signature.parameters.length - 1 + minLength;
                 }
             }
             return signature.minArgumentCount;
         }
 
+        function getRestTypeParameter(signature: Signature) {
+            if (signature.hasRestParameter) {
+                const restType = getTypeOfSymbol(signature.parameters[signature.parameters.length - 1]);
+                if (restType.flags & TypeFlags.TypeParameter) {
+                    return <TypeParameter>restType;
+                }
+            }
+            return undefined;
+        }
+
         function hasEffectiveRestParameter(signature: Signature) {
             return signature.hasRestParameter && !isTupleType(getTypeOfSymbol(signature.parameters[signature.parameters.length - 1]));
         }
@@ -21665,12 +21680,7 @@ namespace ts {
         }
 
         function checkTupleType(node: TupleTypeNode) {
-            // Grammar checking
-            const hasErrorFromDisallowedTrailingComma = checkGrammarForDisallowedTrailingComma(node.elementTypes);
-            if (!hasErrorFromDisallowedTrailingComma && node.elementTypes.length === 0) {
-                grammarErrorOnNode(node, Diagnostics.A_tuple_type_element_list_cannot_be_empty);
-            }
-
+            checkGrammarForDisallowedTrailingComma(node.elementTypes);
             forEach(node.elementTypes, checkSourceElement);
         }
 
@@ -25542,7 +25552,8 @@ namespace ts {
                 case SyntaxKind.IntersectionType:
                     return checkUnionOrIntersectionType(<UnionOrIntersectionTypeNode>node);
                 case SyntaxKind.ParenthesizedType:
-                    return checkSourceElement((<ParenthesizedTypeNode | TypeOperatorNode>node).type);
+                case SyntaxKind.OptionalType:
+                    return checkSourceElement((<ParenthesizedTypeNode | OptionalTypeNode>node).type);
                 case SyntaxKind.TypeOperator:
                     return checkTypeOperator(<TypeOperatorNode>node);
                 case SyntaxKind.ConditionalType:
diff --git a/src/compiler/diagnosticMessages.json b/src/compiler/diagnosticMessages.json
index f2a10a08fdedc..94e295aeca25a 100644
--- a/src/compiler/diagnosticMessages.json
+++ b/src/compiler/diagnosticMessages.json
@@ -367,10 +367,6 @@
         "category": "Error",
         "code": 1121
     },
-    "A tuple type element list cannot be empty.": {
-        "category": "Error",
-        "code": 1122
-    },
     "Variable declaration list cannot be empty.": {
         "category": "Error",
         "code": 1123
diff --git a/src/compiler/emitter.ts b/src/compiler/emitter.ts
index 90ec1c793a379..5012eab2b9af9 100644
--- a/src/compiler/emitter.ts
+++ b/src/compiler/emitter.ts
@@ -640,6 +640,8 @@ namespace ts {
                         return emitArrayType(<ArrayTypeNode>node);
                     case SyntaxKind.TupleType:
                         return emitTupleType(<TupleTypeNode>node);
+                    case SyntaxKind.OptionalType:
+                        return emitOptionalType(<OptionalTypeNode>node);
                     case SyntaxKind.UnionType:
                         return emitUnionType(<UnionTypeNode>node);
                     case SyntaxKind.IntersectionType:
@@ -1296,6 +1298,11 @@ namespace ts {
             writePunctuation("]");
         }
 
+        function emitOptionalType(node: OptionalTypeNode) {
+            emit(node.type);
+            write("?");
+        }
+
         function emitUnionType(node: UnionTypeNode) {
             emitList(node, node.types, ListFormat.UnionTypeConstituents);
         }
diff --git a/src/compiler/factory.ts b/src/compiler/factory.ts
index 2e776134a72e9..1e76077acd105 100644
--- a/src/compiler/factory.ts
+++ b/src/compiler/factory.ts
@@ -745,12 +745,24 @@ namespace ts {
         return node;
     }
 
-    export function updateTypleTypeNode(node: TupleTypeNode, elementTypes: ReadonlyArray<TypeNode>) {
+    export function updateTupleTypeNode(node: TupleTypeNode, elementTypes: ReadonlyArray<TypeNode>) {
         return node.elementTypes !== elementTypes
             ? updateNode(createTupleTypeNode(elementTypes), node)
             : node;
     }
 
+    export function createOptionalTypeNode(type: TypeNode) {
+        const node = createSynthesizedNode(SyntaxKind.OptionalType) as OptionalTypeNode;
+        node.type = parenthesizeArrayTypeMember(type);
+        return node;
+    }
+
+    export function updateOptionalTypeNode(node: OptionalTypeNode, type: TypeNode): OptionalTypeNode {
+        return node.type !== type
+            ? updateNode(createOptionalTypeNode(type), node)
+            : node;
+    }
+
     export function createUnionTypeNode(types: ReadonlyArray<TypeNode>): UnionTypeNode {
         return <UnionTypeNode>createUnionOrIntersectionTypeNode(SyntaxKind.UnionType, types);
     }
diff --git a/src/compiler/parser.ts b/src/compiler/parser.ts
index 74ec3d85931e2..fa5f9adb78db6 100644
--- a/src/compiler/parser.ts
+++ b/src/compiler/parser.ts
@@ -446,19 +446,16 @@ namespace ts {
             case SyntaxKind.JsxClosingElement:
                 return visitNode(cbNode, (<JsxClosingElement>node).tagName);
 
+            case SyntaxKind.OptionalType:
             case SyntaxKind.JSDocTypeExpression:
-                return visitNode(cbNode, (<JSDocTypeExpression>node).type);
             case SyntaxKind.JSDocNonNullableType:
-                return visitNode(cbNode, (<JSDocNonNullableType>node).type);
             case SyntaxKind.JSDocNullableType:
-                return visitNode(cbNode, (<JSDocNullableType>node).type);
             case SyntaxKind.JSDocOptionalType:
-                return visitNode(cbNode, (<JSDocOptionalType>node).type);
+            case SyntaxKind.JSDocVariadicType:
+                return visitNode(cbNode, (<OptionalTypeNode | JSDocTypeExpression | JSDocTypeReferencingNode>node).type);
             case SyntaxKind.JSDocFunctionType:
                 return visitNodes(cbNode, cbNodes, (<JSDocFunctionType>node).parameters) ||
                     visitNode(cbNode, (<JSDocFunctionType>node).type);
-            case SyntaxKind.JSDocVariadicType:
-                return visitNode(cbNode, (<JSDocVariadicType>node).type);
             case SyntaxKind.JSDocComment:
                 return visitNodes(cbNode, cbNodes, (<JSDoc>node).tags);
             case SyntaxKind.JSDocParameterTag:
@@ -2274,7 +2271,7 @@ namespace ts {
         function parseJSDocAllType(postFixEquals: boolean): JSDocAllType | JSDocOptionalType {
             const result = createNode(SyntaxKind.JSDocAllType) as JSDocAllType;
             if (postFixEquals) {
-                return createJSDocPostfixType(SyntaxKind.JSDocOptionalType, result) as JSDocOptionalType;
+                return createPostfixType(SyntaxKind.JSDocOptionalType, result) as JSDocOptionalType;
             }
             else {
                 nextToken();
@@ -2352,7 +2349,7 @@ namespace ts {
                 type = finishNode(variadic);
             }
             if (token() === SyntaxKind.EqualsToken) {
-                return createJSDocPostfixType(SyntaxKind.JSDocOptionalType, type);
+                return createPostfixType(SyntaxKind.JSDocOptionalType, type);
             }
             return type;
         }
@@ -2766,9 +2763,17 @@ namespace ts {
             return finishNode(node);
         }
 
+        function parseTupleElementType() {
+            const type = parseType();
+            if (!(contextFlags & NodeFlags.JSDoc) && type.kind === SyntaxKind.JSDocNullableType && type.pos === (<JSDocNullableType>type).type.pos) {
+                type.kind = SyntaxKind.OptionalType;
+            }
+            return type;
+        }
+
         function parseTupleType(): TupleTypeNode {
             const node = <TupleTypeNode>createNode(SyntaxKind.TupleType);
-            node.elementTypes = parseBracketedList(ParsingContext.TupleElementTypes, parseType, SyntaxKind.OpenBracketToken, SyntaxKind.CloseBracketToken);
+            node.elementTypes = parseBracketedList(ParsingContext.TupleElementTypes, parseTupleElementType, SyntaxKind.OpenBracketToken, SyntaxKind.CloseBracketToken);
             return finishNode(node);
         }
 
@@ -2960,14 +2965,14 @@ namespace ts {
             while (!scanner.hasPrecedingLineBreak()) {
                 switch (token()) {
                     case SyntaxKind.ExclamationToken:
-                        type = createJSDocPostfixType(SyntaxKind.JSDocNonNullableType, type);
+                        type = createPostfixType(SyntaxKind.JSDocNonNullableType, type);
                         break;
                     case SyntaxKind.QuestionToken:
                         // If not in JSDoc and next token is start of a type we have a conditional type
                         if (!(contextFlags & NodeFlags.JSDoc) && lookAhead(nextTokenIsStartOfType)) {
                             return type;
                         }
-                        type = createJSDocPostfixType(SyntaxKind.JSDocNullableType, type);
+                        type = createPostfixType(SyntaxKind.JSDocNullableType, type);
                         break;
                     case SyntaxKind.OpenBracketToken:
                         parseExpected(SyntaxKind.OpenBracketToken);
@@ -2992,9 +2997,9 @@ namespace ts {
             return type;
         }
 
-        function createJSDocPostfixType(kind: SyntaxKind, type: TypeNode) {
+        function createPostfixType(kind: SyntaxKind, type: TypeNode) {
             nextToken();
-            const postfix = createNode(kind, type.pos) as JSDocOptionalType | JSDocNonNullableType | JSDocNullableType;
+            const postfix = createNode(kind, type.pos) as OptionalTypeNode | JSDocOptionalType | JSDocNonNullableType | JSDocNullableType;
             postfix.type = type;
             return finishNode(postfix);
         }
diff --git a/src/compiler/transformers/ts.ts b/src/compiler/transformers/ts.ts
index 076645a14d839..c482af683c50b 100644
--- a/src/compiler/transformers/ts.ts
+++ b/src/compiler/transformers/ts.ts
@@ -380,6 +380,7 @@ namespace ts {
 
                 case SyntaxKind.ArrayType:
                 case SyntaxKind.TupleType:
+                case SyntaxKind.OptionalType:
                 case SyntaxKind.TypeLiteral:
                 case SyntaxKind.TypePredicate:
                 case SyntaxKind.TypeParameter:
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index 93162944fce64..e5f601ccc9d57 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -275,6 +275,7 @@ namespace ts {
         TypeLiteral,
         ArrayType,
         TupleType,
+        OptionalType,
         UnionType,
         IntersectionType,
         ConditionalType,
@@ -1145,6 +1146,11 @@ namespace ts {
         elementTypes: NodeArray<TypeNode>;
     }
 
+    export interface OptionalTypeNode extends TypeNode {
+        kind: SyntaxKind.OptionalType;
+        type: TypeNode;
+    }
+
     export type UnionOrIntersectionTypeNode = UnionTypeNode | IntersectionTypeNode;
 
     export interface UnionTypeNode extends TypeNode {
@@ -3885,6 +3891,10 @@ namespace ts {
         variances?: Variance[];  // Variance of each type parameter
     }
 
+    export interface TupleType extends GenericType {
+        minLength: number;
+    }
+
     export interface UnionOrIntersectionType extends Type {
         types: Type[];                    // Constituent types
         /* @internal */
diff --git a/src/compiler/visitor.ts b/src/compiler/visitor.ts
index cda3158afeb2c..6c7ae614ac8fd 100644
--- a/src/compiler/visitor.ts
+++ b/src/compiler/visitor.ts
@@ -372,9 +372,13 @@ namespace ts {
                     visitNode((<ArrayTypeNode>node).elementType, visitor, isTypeNode));
 
             case SyntaxKind.TupleType:
-                return updateTypleTypeNode((<TupleTypeNode>node),
+                return updateTupleTypeNode((<TupleTypeNode>node),
                     nodesVisitor((<TupleTypeNode>node).elementTypes, visitor, isTypeNode));
 
+            case SyntaxKind.OptionalType:
+                return updateOptionalTypeNode((<OptionalTypeNode>node),
+                    visitNode((<OptionalTypeNode>node).type, visitor, isTypeNode));
+
             case SyntaxKind.UnionType:
                 return updateUnionTypeNode(<UnionTypeNode>node,
                     nodesVisitor((<UnionTypeNode>node).types, visitor, isTypeNode));

From 346276ce7a6fe49ed31d92289ee02d3ceba94047 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Sat, 9 Jun 2018 12:19:46 -0700
Subject: [PATCH 04/37] Accept new baselines

---
 .../baselines/reference/TupleType3.errors.txt |   7 -
 ...nyIndexedAccessArrayNoException.errors.txt |   5 +-
 .../reference/api/tsserverlibrary.d.ts        | 296 +++++++++---------
 tests/baselines/reference/api/typescript.d.ts | 296 +++++++++---------
 .../reference/arrayLiterals3.errors.txt       |   8 +-
 .../baselines/reference/arrayLiterals3.types  |   2 +-
 .../emptyTuplesTypeAssertion01.errors.txt     |   8 -
 .../emptyTuplesTypeAssertion01.types          |   2 +-
 .../emptyTuplesTypeAssertion02.errors.txt     |   8 -
 .../emptyTuplesTypeAssertion02.types          |   2 +-
 .../keyofAndIndexedAccessErrors.errors.txt    |   5 +-
 .../promiseEmptyTupleNoException.errors.txt   |   5 +-
 .../reference/strictTupleLength.errors.txt    |   5 +-
 .../baselines/reference/tupleTypes.errors.txt |  17 +-
 tests/baselines/reference/tupleTypes.types    |   8 +-
 15 files changed, 328 insertions(+), 346 deletions(-)
 delete mode 100644 tests/baselines/reference/TupleType3.errors.txt
 delete mode 100644 tests/baselines/reference/emptyTuplesTypeAssertion01.errors.txt
 delete mode 100644 tests/baselines/reference/emptyTuplesTypeAssertion02.errors.txt

diff --git a/tests/baselines/reference/TupleType3.errors.txt b/tests/baselines/reference/TupleType3.errors.txt
deleted file mode 100644
index a7f5b1173257d..0000000000000
--- a/tests/baselines/reference/TupleType3.errors.txt
+++ /dev/null
@@ -1,7 +0,0 @@
-tests/cases/conformance/parser/ecmascript5/TupleTypes/TupleType3.ts(1,8): error TS1122: A tuple type element list cannot be empty.
-
-
-==== tests/cases/conformance/parser/ecmascript5/TupleTypes/TupleType3.ts (1 errors) ====
-    var v: []
-           ~~
-!!! error TS1122: A tuple type element list cannot be empty.
\ No newline at end of file
diff --git a/tests/baselines/reference/anyIndexedAccessArrayNoException.errors.txt b/tests/baselines/reference/anyIndexedAccessArrayNoException.errors.txt
index 01c5bd6b2e2c0..e207468122bc0 100644
--- a/tests/baselines/reference/anyIndexedAccessArrayNoException.errors.txt
+++ b/tests/baselines/reference/anyIndexedAccessArrayNoException.errors.txt
@@ -1,11 +1,8 @@
-tests/cases/compiler/anyIndexedAccessArrayNoException.ts(1,12): error TS1122: A tuple type element list cannot be empty.
 tests/cases/compiler/anyIndexedAccessArrayNoException.ts(1,12): error TS2538: Type '[]' cannot be used as an index type.
 
 
-==== tests/cases/compiler/anyIndexedAccessArrayNoException.ts (2 errors) ====
+==== tests/cases/compiler/anyIndexedAccessArrayNoException.ts (1 errors) ====
     var x: any[[]];
                ~~
-!!! error TS1122: A tuple type element list cannot be empty.
-               ~~
 !!! error TS2538: Type '[]' cannot be used as an index type.
     
\ No newline at end of file
diff --git a/tests/baselines/reference/api/tsserverlibrary.d.ts b/tests/baselines/reference/api/tsserverlibrary.d.ts
index bf6db412bf856..837497afc846c 100644
--- a/tests/baselines/reference/api/tsserverlibrary.d.ts
+++ b/tests/baselines/reference/api/tsserverlibrary.d.ts
@@ -231,143 +231,144 @@ declare namespace ts {
         TypeLiteral = 166,
         ArrayType = 167,
         TupleType = 168,
-        UnionType = 169,
-        IntersectionType = 170,
-        ConditionalType = 171,
-        InferType = 172,
-        ParenthesizedType = 173,
-        ThisType = 174,
-        TypeOperator = 175,
-        IndexedAccessType = 176,
-        MappedType = 177,
-        LiteralType = 178,
-        ImportType = 179,
-        ObjectBindingPattern = 180,
-        ArrayBindingPattern = 181,
-        BindingElement = 182,
-        ArrayLiteralExpression = 183,
-        ObjectLiteralExpression = 184,
-        PropertyAccessExpression = 185,
-        ElementAccessExpression = 186,
-        CallExpression = 187,
-        NewExpression = 188,
-        TaggedTemplateExpression = 189,
-        TypeAssertionExpression = 190,
-        ParenthesizedExpression = 191,
-        FunctionExpression = 192,
-        ArrowFunction = 193,
-        DeleteExpression = 194,
-        TypeOfExpression = 195,
-        VoidExpression = 196,
-        AwaitExpression = 197,
-        PrefixUnaryExpression = 198,
-        PostfixUnaryExpression = 199,
-        BinaryExpression = 200,
-        ConditionalExpression = 201,
-        TemplateExpression = 202,
-        YieldExpression = 203,
-        SpreadElement = 204,
-        ClassExpression = 205,
-        OmittedExpression = 206,
-        ExpressionWithTypeArguments = 207,
-        AsExpression = 208,
-        NonNullExpression = 209,
-        MetaProperty = 210,
-        TemplateSpan = 211,
-        SemicolonClassElement = 212,
-        Block = 213,
-        VariableStatement = 214,
-        EmptyStatement = 215,
-        ExpressionStatement = 216,
-        IfStatement = 217,
-        DoStatement = 218,
-        WhileStatement = 219,
-        ForStatement = 220,
-        ForInStatement = 221,
-        ForOfStatement = 222,
-        ContinueStatement = 223,
-        BreakStatement = 224,
-        ReturnStatement = 225,
-        WithStatement = 226,
-        SwitchStatement = 227,
-        LabeledStatement = 228,
-        ThrowStatement = 229,
-        TryStatement = 230,
-        DebuggerStatement = 231,
-        VariableDeclaration = 232,
-        VariableDeclarationList = 233,
-        FunctionDeclaration = 234,
-        ClassDeclaration = 235,
-        InterfaceDeclaration = 236,
-        TypeAliasDeclaration = 237,
-        EnumDeclaration = 238,
-        ModuleDeclaration = 239,
-        ModuleBlock = 240,
-        CaseBlock = 241,
-        NamespaceExportDeclaration = 242,
-        ImportEqualsDeclaration = 243,
-        ImportDeclaration = 244,
-        ImportClause = 245,
-        NamespaceImport = 246,
-        NamedImports = 247,
-        ImportSpecifier = 248,
-        ExportAssignment = 249,
-        ExportDeclaration = 250,
-        NamedExports = 251,
-        ExportSpecifier = 252,
-        MissingDeclaration = 253,
-        ExternalModuleReference = 254,
-        JsxElement = 255,
-        JsxSelfClosingElement = 256,
-        JsxOpeningElement = 257,
-        JsxClosingElement = 258,
-        JsxFragment = 259,
-        JsxOpeningFragment = 260,
-        JsxClosingFragment = 261,
-        JsxAttribute = 262,
-        JsxAttributes = 263,
-        JsxSpreadAttribute = 264,
-        JsxExpression = 265,
-        CaseClause = 266,
-        DefaultClause = 267,
-        HeritageClause = 268,
-        CatchClause = 269,
-        PropertyAssignment = 270,
-        ShorthandPropertyAssignment = 271,
-        SpreadAssignment = 272,
-        EnumMember = 273,
-        SourceFile = 274,
-        Bundle = 275,
-        UnparsedSource = 276,
-        InputFiles = 277,
-        JSDocTypeExpression = 278,
-        JSDocAllType = 279,
-        JSDocUnknownType = 280,
-        JSDocNullableType = 281,
-        JSDocNonNullableType = 282,
-        JSDocOptionalType = 283,
-        JSDocFunctionType = 284,
-        JSDocVariadicType = 285,
-        JSDocComment = 286,
-        JSDocTypeLiteral = 287,
-        JSDocSignature = 288,
-        JSDocTag = 289,
-        JSDocAugmentsTag = 290,
-        JSDocClassTag = 291,
-        JSDocCallbackTag = 292,
-        JSDocParameterTag = 293,
-        JSDocReturnTag = 294,
-        JSDocTypeTag = 295,
-        JSDocTemplateTag = 296,
-        JSDocTypedefTag = 297,
-        JSDocPropertyTag = 298,
-        SyntaxList = 299,
-        NotEmittedStatement = 300,
-        PartiallyEmittedExpression = 301,
-        CommaListExpression = 302,
-        MergeDeclarationMarker = 303,
-        EndOfDeclarationMarker = 304,
-        Count = 305,
+        OptionalType = 169,
+        UnionType = 170,
+        IntersectionType = 171,
+        ConditionalType = 172,
+        InferType = 173,
+        ParenthesizedType = 174,
+        ThisType = 175,
+        TypeOperator = 176,
+        IndexedAccessType = 177,
+        MappedType = 178,
+        LiteralType = 179,
+        ImportType = 180,
+        ObjectBindingPattern = 181,
+        ArrayBindingPattern = 182,
+        BindingElement = 183,
+        ArrayLiteralExpression = 184,
+        ObjectLiteralExpression = 185,
+        PropertyAccessExpression = 186,
+        ElementAccessExpression = 187,
+        CallExpression = 188,
+        NewExpression = 189,
+        TaggedTemplateExpression = 190,
+        TypeAssertionExpression = 191,
+        ParenthesizedExpression = 192,
+        FunctionExpression = 193,
+        ArrowFunction = 194,
+        DeleteExpression = 195,
+        TypeOfExpression = 196,
+        VoidExpression = 197,
+        AwaitExpression = 198,
+        PrefixUnaryExpression = 199,
+        PostfixUnaryExpression = 200,
+        BinaryExpression = 201,
+        ConditionalExpression = 202,
+        TemplateExpression = 203,
+        YieldExpression = 204,
+        SpreadElement = 205,
+        ClassExpression = 206,
+        OmittedExpression = 207,
+        ExpressionWithTypeArguments = 208,
+        AsExpression = 209,
+        NonNullExpression = 210,
+        MetaProperty = 211,
+        TemplateSpan = 212,
+        SemicolonClassElement = 213,
+        Block = 214,
+        VariableStatement = 215,
+        EmptyStatement = 216,
+        ExpressionStatement = 217,
+        IfStatement = 218,
+        DoStatement = 219,
+        WhileStatement = 220,
+        ForStatement = 221,
+        ForInStatement = 222,
+        ForOfStatement = 223,
+        ContinueStatement = 224,
+        BreakStatement = 225,
+        ReturnStatement = 226,
+        WithStatement = 227,
+        SwitchStatement = 228,
+        LabeledStatement = 229,
+        ThrowStatement = 230,
+        TryStatement = 231,
+        DebuggerStatement = 232,
+        VariableDeclaration = 233,
+        VariableDeclarationList = 234,
+        FunctionDeclaration = 235,
+        ClassDeclaration = 236,
+        InterfaceDeclaration = 237,
+        TypeAliasDeclaration = 238,
+        EnumDeclaration = 239,
+        ModuleDeclaration = 240,
+        ModuleBlock = 241,
+        CaseBlock = 242,
+        NamespaceExportDeclaration = 243,
+        ImportEqualsDeclaration = 244,
+        ImportDeclaration = 245,
+        ImportClause = 246,
+        NamespaceImport = 247,
+        NamedImports = 248,
+        ImportSpecifier = 249,
+        ExportAssignment = 250,
+        ExportDeclaration = 251,
+        NamedExports = 252,
+        ExportSpecifier = 253,
+        MissingDeclaration = 254,
+        ExternalModuleReference = 255,
+        JsxElement = 256,
+        JsxSelfClosingElement = 257,
+        JsxOpeningElement = 258,
+        JsxClosingElement = 259,
+        JsxFragment = 260,
+        JsxOpeningFragment = 261,
+        JsxClosingFragment = 262,
+        JsxAttribute = 263,
+        JsxAttributes = 264,
+        JsxSpreadAttribute = 265,
+        JsxExpression = 266,
+        CaseClause = 267,
+        DefaultClause = 268,
+        HeritageClause = 269,
+        CatchClause = 270,
+        PropertyAssignment = 271,
+        ShorthandPropertyAssignment = 272,
+        SpreadAssignment = 273,
+        EnumMember = 274,
+        SourceFile = 275,
+        Bundle = 276,
+        UnparsedSource = 277,
+        InputFiles = 278,
+        JSDocTypeExpression = 279,
+        JSDocAllType = 280,
+        JSDocUnknownType = 281,
+        JSDocNullableType = 282,
+        JSDocNonNullableType = 283,
+        JSDocOptionalType = 284,
+        JSDocFunctionType = 285,
+        JSDocVariadicType = 286,
+        JSDocComment = 287,
+        JSDocTypeLiteral = 288,
+        JSDocSignature = 289,
+        JSDocTag = 290,
+        JSDocAugmentsTag = 291,
+        JSDocClassTag = 292,
+        JSDocCallbackTag = 293,
+        JSDocParameterTag = 294,
+        JSDocReturnTag = 295,
+        JSDocTypeTag = 296,
+        JSDocTemplateTag = 297,
+        JSDocTypedefTag = 298,
+        JSDocPropertyTag = 299,
+        SyntaxList = 300,
+        NotEmittedStatement = 301,
+        PartiallyEmittedExpression = 302,
+        CommaListExpression = 303,
+        MergeDeclarationMarker = 304,
+        EndOfDeclarationMarker = 305,
+        Count = 306,
         FirstAssignment = 58,
         LastAssignment = 70,
         FirstCompoundAssignment = 59,
@@ -379,7 +380,7 @@ declare namespace ts {
         FirstFutureReservedWord = 108,
         LastFutureReservedWord = 116,
         FirstTypeNode = 161,
-        LastTypeNode = 179,
+        LastTypeNode = 180,
         FirstPunctuation = 17,
         LastPunctuation = 70,
         FirstToken = 0,
@@ -393,10 +394,10 @@ declare namespace ts {
         FirstBinaryOperator = 27,
         LastBinaryOperator = 70,
         FirstNode = 146,
-        FirstJSDocNode = 278,
-        LastJSDocNode = 298,
-        FirstJSDocTagNode = 289,
-        LastJSDocTagNode = 298
+        FirstJSDocNode = 279,
+        LastJSDocNode = 299,
+        FirstJSDocTagNode = 290,
+        LastJSDocTagNode = 299
     }
     enum NodeFlags {
         None = 0,
@@ -751,6 +752,10 @@ declare namespace ts {
         kind: SyntaxKind.TupleType;
         elementTypes: NodeArray<TypeNode>;
     }
+    interface OptionalTypeNode extends TypeNode {
+        kind: SyntaxKind.OptionalType;
+        type: TypeNode;
+    }
     type UnionOrIntersectionTypeNode = UnionTypeNode | IntersectionTypeNode;
     interface UnionTypeNode extends TypeNode {
         kind: SyntaxKind.UnionType;
@@ -2249,6 +2254,9 @@ declare namespace ts {
     }
     interface GenericType extends InterfaceType, TypeReference {
     }
+    interface TupleType extends GenericType {
+        minLength: number;
+    }
     interface UnionOrIntersectionType extends Type {
         types: Type[];
     }
@@ -3590,7 +3598,9 @@ declare namespace ts {
     function createArrayTypeNode(elementType: TypeNode): ArrayTypeNode;
     function updateArrayTypeNode(node: ArrayTypeNode, elementType: TypeNode): ArrayTypeNode;
     function createTupleTypeNode(elementTypes: ReadonlyArray<TypeNode>): TupleTypeNode;
-    function updateTypleTypeNode(node: TupleTypeNode, elementTypes: ReadonlyArray<TypeNode>): TupleTypeNode;
+    function updateTupleTypeNode(node: TupleTypeNode, elementTypes: ReadonlyArray<TypeNode>): TupleTypeNode;
+    function createOptionalTypeNode(type: TypeNode): OptionalTypeNode;
+    function updateOptionalTypeNode(node: OptionalTypeNode, type: TypeNode): OptionalTypeNode;
     function createUnionTypeNode(types: ReadonlyArray<TypeNode>): UnionTypeNode;
     function updateUnionTypeNode(node: UnionTypeNode, types: NodeArray<TypeNode>): UnionTypeNode;
     function createIntersectionTypeNode(types: ReadonlyArray<TypeNode>): IntersectionTypeNode;
diff --git a/tests/baselines/reference/api/typescript.d.ts b/tests/baselines/reference/api/typescript.d.ts
index 32316e23f1238..8a3315927a373 100644
--- a/tests/baselines/reference/api/typescript.d.ts
+++ b/tests/baselines/reference/api/typescript.d.ts
@@ -231,143 +231,144 @@ declare namespace ts {
         TypeLiteral = 166,
         ArrayType = 167,
         TupleType = 168,
-        UnionType = 169,
-        IntersectionType = 170,
-        ConditionalType = 171,
-        InferType = 172,
-        ParenthesizedType = 173,
-        ThisType = 174,
-        TypeOperator = 175,
-        IndexedAccessType = 176,
-        MappedType = 177,
-        LiteralType = 178,
-        ImportType = 179,
-        ObjectBindingPattern = 180,
-        ArrayBindingPattern = 181,
-        BindingElement = 182,
-        ArrayLiteralExpression = 183,
-        ObjectLiteralExpression = 184,
-        PropertyAccessExpression = 185,
-        ElementAccessExpression = 186,
-        CallExpression = 187,
-        NewExpression = 188,
-        TaggedTemplateExpression = 189,
-        TypeAssertionExpression = 190,
-        ParenthesizedExpression = 191,
-        FunctionExpression = 192,
-        ArrowFunction = 193,
-        DeleteExpression = 194,
-        TypeOfExpression = 195,
-        VoidExpression = 196,
-        AwaitExpression = 197,
-        PrefixUnaryExpression = 198,
-        PostfixUnaryExpression = 199,
-        BinaryExpression = 200,
-        ConditionalExpression = 201,
-        TemplateExpression = 202,
-        YieldExpression = 203,
-        SpreadElement = 204,
-        ClassExpression = 205,
-        OmittedExpression = 206,
-        ExpressionWithTypeArguments = 207,
-        AsExpression = 208,
-        NonNullExpression = 209,
-        MetaProperty = 210,
-        TemplateSpan = 211,
-        SemicolonClassElement = 212,
-        Block = 213,
-        VariableStatement = 214,
-        EmptyStatement = 215,
-        ExpressionStatement = 216,
-        IfStatement = 217,
-        DoStatement = 218,
-        WhileStatement = 219,
-        ForStatement = 220,
-        ForInStatement = 221,
-        ForOfStatement = 222,
-        ContinueStatement = 223,
-        BreakStatement = 224,
-        ReturnStatement = 225,
-        WithStatement = 226,
-        SwitchStatement = 227,
-        LabeledStatement = 228,
-        ThrowStatement = 229,
-        TryStatement = 230,
-        DebuggerStatement = 231,
-        VariableDeclaration = 232,
-        VariableDeclarationList = 233,
-        FunctionDeclaration = 234,
-        ClassDeclaration = 235,
-        InterfaceDeclaration = 236,
-        TypeAliasDeclaration = 237,
-        EnumDeclaration = 238,
-        ModuleDeclaration = 239,
-        ModuleBlock = 240,
-        CaseBlock = 241,
-        NamespaceExportDeclaration = 242,
-        ImportEqualsDeclaration = 243,
-        ImportDeclaration = 244,
-        ImportClause = 245,
-        NamespaceImport = 246,
-        NamedImports = 247,
-        ImportSpecifier = 248,
-        ExportAssignment = 249,
-        ExportDeclaration = 250,
-        NamedExports = 251,
-        ExportSpecifier = 252,
-        MissingDeclaration = 253,
-        ExternalModuleReference = 254,
-        JsxElement = 255,
-        JsxSelfClosingElement = 256,
-        JsxOpeningElement = 257,
-        JsxClosingElement = 258,
-        JsxFragment = 259,
-        JsxOpeningFragment = 260,
-        JsxClosingFragment = 261,
-        JsxAttribute = 262,
-        JsxAttributes = 263,
-        JsxSpreadAttribute = 264,
-        JsxExpression = 265,
-        CaseClause = 266,
-        DefaultClause = 267,
-        HeritageClause = 268,
-        CatchClause = 269,
-        PropertyAssignment = 270,
-        ShorthandPropertyAssignment = 271,
-        SpreadAssignment = 272,
-        EnumMember = 273,
-        SourceFile = 274,
-        Bundle = 275,
-        UnparsedSource = 276,
-        InputFiles = 277,
-        JSDocTypeExpression = 278,
-        JSDocAllType = 279,
-        JSDocUnknownType = 280,
-        JSDocNullableType = 281,
-        JSDocNonNullableType = 282,
-        JSDocOptionalType = 283,
-        JSDocFunctionType = 284,
-        JSDocVariadicType = 285,
-        JSDocComment = 286,
-        JSDocTypeLiteral = 287,
-        JSDocSignature = 288,
-        JSDocTag = 289,
-        JSDocAugmentsTag = 290,
-        JSDocClassTag = 291,
-        JSDocCallbackTag = 292,
-        JSDocParameterTag = 293,
-        JSDocReturnTag = 294,
-        JSDocTypeTag = 295,
-        JSDocTemplateTag = 296,
-        JSDocTypedefTag = 297,
-        JSDocPropertyTag = 298,
-        SyntaxList = 299,
-        NotEmittedStatement = 300,
-        PartiallyEmittedExpression = 301,
-        CommaListExpression = 302,
-        MergeDeclarationMarker = 303,
-        EndOfDeclarationMarker = 304,
-        Count = 305,
+        OptionalType = 169,
+        UnionType = 170,
+        IntersectionType = 171,
+        ConditionalType = 172,
+        InferType = 173,
+        ParenthesizedType = 174,
+        ThisType = 175,
+        TypeOperator = 176,
+        IndexedAccessType = 177,
+        MappedType = 178,
+        LiteralType = 179,
+        ImportType = 180,
+        ObjectBindingPattern = 181,
+        ArrayBindingPattern = 182,
+        BindingElement = 183,
+        ArrayLiteralExpression = 184,
+        ObjectLiteralExpression = 185,
+        PropertyAccessExpression = 186,
+        ElementAccessExpression = 187,
+        CallExpression = 188,
+        NewExpression = 189,
+        TaggedTemplateExpression = 190,
+        TypeAssertionExpression = 191,
+        ParenthesizedExpression = 192,
+        FunctionExpression = 193,
+        ArrowFunction = 194,
+        DeleteExpression = 195,
+        TypeOfExpression = 196,
+        VoidExpression = 197,
+        AwaitExpression = 198,
+        PrefixUnaryExpression = 199,
+        PostfixUnaryExpression = 200,
+        BinaryExpression = 201,
+        ConditionalExpression = 202,
+        TemplateExpression = 203,
+        YieldExpression = 204,
+        SpreadElement = 205,
+        ClassExpression = 206,
+        OmittedExpression = 207,
+        ExpressionWithTypeArguments = 208,
+        AsExpression = 209,
+        NonNullExpression = 210,
+        MetaProperty = 211,
+        TemplateSpan = 212,
+        SemicolonClassElement = 213,
+        Block = 214,
+        VariableStatement = 215,
+        EmptyStatement = 216,
+        ExpressionStatement = 217,
+        IfStatement = 218,
+        DoStatement = 219,
+        WhileStatement = 220,
+        ForStatement = 221,
+        ForInStatement = 222,
+        ForOfStatement = 223,
+        ContinueStatement = 224,
+        BreakStatement = 225,
+        ReturnStatement = 226,
+        WithStatement = 227,
+        SwitchStatement = 228,
+        LabeledStatement = 229,
+        ThrowStatement = 230,
+        TryStatement = 231,
+        DebuggerStatement = 232,
+        VariableDeclaration = 233,
+        VariableDeclarationList = 234,
+        FunctionDeclaration = 235,
+        ClassDeclaration = 236,
+        InterfaceDeclaration = 237,
+        TypeAliasDeclaration = 238,
+        EnumDeclaration = 239,
+        ModuleDeclaration = 240,
+        ModuleBlock = 241,
+        CaseBlock = 242,
+        NamespaceExportDeclaration = 243,
+        ImportEqualsDeclaration = 244,
+        ImportDeclaration = 245,
+        ImportClause = 246,
+        NamespaceImport = 247,
+        NamedImports = 248,
+        ImportSpecifier = 249,
+        ExportAssignment = 250,
+        ExportDeclaration = 251,
+        NamedExports = 252,
+        ExportSpecifier = 253,
+        MissingDeclaration = 254,
+        ExternalModuleReference = 255,
+        JsxElement = 256,
+        JsxSelfClosingElement = 257,
+        JsxOpeningElement = 258,
+        JsxClosingElement = 259,
+        JsxFragment = 260,
+        JsxOpeningFragment = 261,
+        JsxClosingFragment = 262,
+        JsxAttribute = 263,
+        JsxAttributes = 264,
+        JsxSpreadAttribute = 265,
+        JsxExpression = 266,
+        CaseClause = 267,
+        DefaultClause = 268,
+        HeritageClause = 269,
+        CatchClause = 270,
+        PropertyAssignment = 271,
+        ShorthandPropertyAssignment = 272,
+        SpreadAssignment = 273,
+        EnumMember = 274,
+        SourceFile = 275,
+        Bundle = 276,
+        UnparsedSource = 277,
+        InputFiles = 278,
+        JSDocTypeExpression = 279,
+        JSDocAllType = 280,
+        JSDocUnknownType = 281,
+        JSDocNullableType = 282,
+        JSDocNonNullableType = 283,
+        JSDocOptionalType = 284,
+        JSDocFunctionType = 285,
+        JSDocVariadicType = 286,
+        JSDocComment = 287,
+        JSDocTypeLiteral = 288,
+        JSDocSignature = 289,
+        JSDocTag = 290,
+        JSDocAugmentsTag = 291,
+        JSDocClassTag = 292,
+        JSDocCallbackTag = 293,
+        JSDocParameterTag = 294,
+        JSDocReturnTag = 295,
+        JSDocTypeTag = 296,
+        JSDocTemplateTag = 297,
+        JSDocTypedefTag = 298,
+        JSDocPropertyTag = 299,
+        SyntaxList = 300,
+        NotEmittedStatement = 301,
+        PartiallyEmittedExpression = 302,
+        CommaListExpression = 303,
+        MergeDeclarationMarker = 304,
+        EndOfDeclarationMarker = 305,
+        Count = 306,
         FirstAssignment = 58,
         LastAssignment = 70,
         FirstCompoundAssignment = 59,
@@ -379,7 +380,7 @@ declare namespace ts {
         FirstFutureReservedWord = 108,
         LastFutureReservedWord = 116,
         FirstTypeNode = 161,
-        LastTypeNode = 179,
+        LastTypeNode = 180,
         FirstPunctuation = 17,
         LastPunctuation = 70,
         FirstToken = 0,
@@ -393,10 +394,10 @@ declare namespace ts {
         FirstBinaryOperator = 27,
         LastBinaryOperator = 70,
         FirstNode = 146,
-        FirstJSDocNode = 278,
-        LastJSDocNode = 298,
-        FirstJSDocTagNode = 289,
-        LastJSDocTagNode = 298
+        FirstJSDocNode = 279,
+        LastJSDocNode = 299,
+        FirstJSDocTagNode = 290,
+        LastJSDocTagNode = 299
     }
     enum NodeFlags {
         None = 0,
@@ -751,6 +752,10 @@ declare namespace ts {
         kind: SyntaxKind.TupleType;
         elementTypes: NodeArray<TypeNode>;
     }
+    interface OptionalTypeNode extends TypeNode {
+        kind: SyntaxKind.OptionalType;
+        type: TypeNode;
+    }
     type UnionOrIntersectionTypeNode = UnionTypeNode | IntersectionTypeNode;
     interface UnionTypeNode extends TypeNode {
         kind: SyntaxKind.UnionType;
@@ -2249,6 +2254,9 @@ declare namespace ts {
     }
     interface GenericType extends InterfaceType, TypeReference {
     }
+    interface TupleType extends GenericType {
+        minLength: number;
+    }
     interface UnionOrIntersectionType extends Type {
         types: Type[];
     }
@@ -3590,7 +3598,9 @@ declare namespace ts {
     function createArrayTypeNode(elementType: TypeNode): ArrayTypeNode;
     function updateArrayTypeNode(node: ArrayTypeNode, elementType: TypeNode): ArrayTypeNode;
     function createTupleTypeNode(elementTypes: ReadonlyArray<TypeNode>): TupleTypeNode;
-    function updateTypleTypeNode(node: TupleTypeNode, elementTypes: ReadonlyArray<TypeNode>): TupleTypeNode;
+    function updateTupleTypeNode(node: TupleTypeNode, elementTypes: ReadonlyArray<TypeNode>): TupleTypeNode;
+    function createOptionalTypeNode(type: TypeNode): OptionalTypeNode;
+    function updateOptionalTypeNode(node: OptionalTypeNode, type: TypeNode): OptionalTypeNode;
     function createUnionTypeNode(types: ReadonlyArray<TypeNode>): UnionTypeNode;
     function updateUnionTypeNode(node: UnionTypeNode, types: NodeArray<TypeNode>): UnionTypeNode;
     function createIntersectionTypeNode(types: ReadonlyArray<TypeNode>): IntersectionTypeNode;
diff --git a/tests/baselines/reference/arrayLiterals3.errors.txt b/tests/baselines/reference/arrayLiterals3.errors.txt
index a3a3b88bc4a8a..8ce34900b0a7b 100644
--- a/tests/baselines/reference/arrayLiterals3.errors.txt
+++ b/tests/baselines/reference/arrayLiterals3.errors.txt
@@ -1,5 +1,5 @@
-tests/cases/conformance/expressions/arrayLiterals/arrayLiterals3.ts(10,5): error TS2322: Type 'undefined[]' is not assignable to type '[any, any, any]'.
-  Property '0' is missing in type 'undefined[]'.
+tests/cases/conformance/expressions/arrayLiterals/arrayLiterals3.ts(10,5): error TS2322: Type '[]' is not assignable to type '[any, any, any]'.
+  Property '0' is missing in type '[]'.
 tests/cases/conformance/expressions/arrayLiterals/arrayLiterals3.ts(11,5): error TS2322: Type '[string, number, boolean]' is not assignable to type '[boolean, string, number]'.
   Type 'string' is not assignable to type 'boolean'.
 tests/cases/conformance/expressions/arrayLiterals/arrayLiterals3.ts(17,5): error TS2322: Type '[number, number, string, boolean]' is not assignable to type '[number, number]'.
@@ -30,8 +30,8 @@ tests/cases/conformance/expressions/arrayLiterals/arrayLiterals3.ts(34,5): error
     
     var a0: [any, any, any] = [];                             // Error
         ~~
-!!! error TS2322: Type 'undefined[]' is not assignable to type '[any, any, any]'.
-!!! error TS2322:   Property '0' is missing in type 'undefined[]'.
+!!! error TS2322: Type '[]' is not assignable to type '[any, any, any]'.
+!!! error TS2322:   Property '0' is missing in type '[]'.
     var a1: [boolean, string, number] = ["string", 1, true];  // Error
         ~~
 !!! error TS2322: Type '[string, number, boolean]' is not assignable to type '[boolean, string, number]'.
diff --git a/tests/baselines/reference/arrayLiterals3.types b/tests/baselines/reference/arrayLiterals3.types
index 7d890f38fb4d8..bf3ff4cf4f640 100644
--- a/tests/baselines/reference/arrayLiterals3.types
+++ b/tests/baselines/reference/arrayLiterals3.types
@@ -10,7 +10,7 @@
 
 var a0: [any, any, any] = [];                             // Error
 >a0 : [any, any, any]
->[] : undefined[]
+>[] : []
 
 var a1: [boolean, string, number] = ["string", 1, true];  // Error
 >a1 : [boolean, string, number]
diff --git a/tests/baselines/reference/emptyTuplesTypeAssertion01.errors.txt b/tests/baselines/reference/emptyTuplesTypeAssertion01.errors.txt
deleted file mode 100644
index bfe850a5749bf..0000000000000
--- a/tests/baselines/reference/emptyTuplesTypeAssertion01.errors.txt
+++ /dev/null
@@ -1,8 +0,0 @@
-tests/cases/conformance/types/tuple/emptyTuples/emptyTuplesTypeAssertion01.ts(1,10): error TS1122: A tuple type element list cannot be empty.
-
-
-==== tests/cases/conformance/types/tuple/emptyTuples/emptyTuplesTypeAssertion01.ts (1 errors) ====
-    let x = <[]>[];
-             ~~
-!!! error TS1122: A tuple type element list cannot be empty.
-    let y = x[0];
\ No newline at end of file
diff --git a/tests/baselines/reference/emptyTuplesTypeAssertion01.types b/tests/baselines/reference/emptyTuplesTypeAssertion01.types
index 3ccfab4cb616a..0a278c01d3169 100644
--- a/tests/baselines/reference/emptyTuplesTypeAssertion01.types
+++ b/tests/baselines/reference/emptyTuplesTypeAssertion01.types
@@ -2,7 +2,7 @@
 let x = <[]>[];
 >x : []
 ><[]>[] : []
->[] : undefined[]
+>[] : []
 
 let y = x[0];
 >y : never
diff --git a/tests/baselines/reference/emptyTuplesTypeAssertion02.errors.txt b/tests/baselines/reference/emptyTuplesTypeAssertion02.errors.txt
deleted file mode 100644
index 1bbf96e6aec70..0000000000000
--- a/tests/baselines/reference/emptyTuplesTypeAssertion02.errors.txt
+++ /dev/null
@@ -1,8 +0,0 @@
-tests/cases/conformance/types/tuple/emptyTuples/emptyTuplesTypeAssertion02.ts(1,15): error TS1122: A tuple type element list cannot be empty.
-
-
-==== tests/cases/conformance/types/tuple/emptyTuples/emptyTuplesTypeAssertion02.ts (1 errors) ====
-    let x = [] as [];
-                  ~~
-!!! error TS1122: A tuple type element list cannot be empty.
-    let y = x[0];
\ No newline at end of file
diff --git a/tests/baselines/reference/emptyTuplesTypeAssertion02.types b/tests/baselines/reference/emptyTuplesTypeAssertion02.types
index 9b791a5e4155d..ef35e90eac2cb 100644
--- a/tests/baselines/reference/emptyTuplesTypeAssertion02.types
+++ b/tests/baselines/reference/emptyTuplesTypeAssertion02.types
@@ -2,7 +2,7 @@
 let x = [] as [];
 >x : []
 >[] as [] : []
->[] : undefined[]
+>[] : []
 
 let y = x[0];
 >y : never
diff --git a/tests/baselines/reference/keyofAndIndexedAccessErrors.errors.txt b/tests/baselines/reference/keyofAndIndexedAccessErrors.errors.txt
index c74c90c510f1b..14cfbd1ceab29 100644
--- a/tests/baselines/reference/keyofAndIndexedAccessErrors.errors.txt
+++ b/tests/baselines/reference/keyofAndIndexedAccessErrors.errors.txt
@@ -15,7 +15,6 @@ tests/cases/conformance/types/keyof/keyofAndIndexedAccessErrors.ts(35,21): error
 tests/cases/conformance/types/keyof/keyofAndIndexedAccessErrors.ts(36,21): error TS2538: Type 'boolean' cannot be used as an index type.
 tests/cases/conformance/types/keyof/keyofAndIndexedAccessErrors.ts(41,31): error TS2538: Type 'boolean' cannot be used as an index type.
 tests/cases/conformance/types/keyof/keyofAndIndexedAccessErrors.ts(46,16): error TS2538: Type 'boolean' cannot be used as an index type.
-tests/cases/conformance/types/keyof/keyofAndIndexedAccessErrors.ts(49,12): error TS1122: A tuple type element list cannot be empty.
 tests/cases/conformance/types/keyof/keyofAndIndexedAccessErrors.ts(63,33): error TS2345: Argument of type '"size"' is not assignable to parameter of type '"name" | "width" | "height" | "visible"'.
 tests/cases/conformance/types/keyof/keyofAndIndexedAccessErrors.ts(64,33): error TS2345: Argument of type '"name" | "size"' is not assignable to parameter of type '"name" | "width" | "height" | "visible"'.
   Type '"size"' is not assignable to type '"name" | "width" | "height" | "visible"'.
@@ -61,7 +60,7 @@ tests/cases/conformance/types/keyof/keyofAndIndexedAccessErrors.ts(117,5): error
   Type 'T' is not assignable to type 'U'.
 
 
-==== tests/cases/conformance/types/keyof/keyofAndIndexedAccessErrors.ts (34 errors) ====
+==== tests/cases/conformance/types/keyof/keyofAndIndexedAccessErrors.ts (33 errors) ====
     class Shape {
         name: string;
         width: number;
@@ -145,8 +144,6 @@ tests/cases/conformance/types/keyof/keyofAndIndexedAccessErrors.ts(117,5): error
     
     type T60 = {}["toString"];
     type T61 = []["toString"];
-               ~~
-!!! error TS1122: A tuple type element list cannot be empty.
     
     declare let cond: boolean;
     
diff --git a/tests/baselines/reference/promiseEmptyTupleNoException.errors.txt b/tests/baselines/reference/promiseEmptyTupleNoException.errors.txt
index 73d768ddfeb71..77e78a676b406 100644
--- a/tests/baselines/reference/promiseEmptyTupleNoException.errors.txt
+++ b/tests/baselines/reference/promiseEmptyTupleNoException.errors.txt
@@ -1,13 +1,10 @@
-tests/cases/compiler/promiseEmptyTupleNoException.ts(1,38): error TS1122: A tuple type element list cannot be empty.
 tests/cases/compiler/promiseEmptyTupleNoException.ts(3,3): error TS2322: Type 'any[]' is not assignable to type '[]'.
   Types of property 'length' are incompatible.
     Type 'number' is not assignable to type '0'.
 
 
-==== tests/cases/compiler/promiseEmptyTupleNoException.ts (2 errors) ====
+==== tests/cases/compiler/promiseEmptyTupleNoException.ts (1 errors) ====
     export async function get(): Promise<[]> {
-                                         ~~
-!!! error TS1122: A tuple type element list cannot be empty.
       let emails = [];
       return emails;
       ~~~~~~~~~~~~~~
diff --git a/tests/baselines/reference/strictTupleLength.errors.txt b/tests/baselines/reference/strictTupleLength.errors.txt
index 23915f1f6fae6..a4a51cc9b0f4b 100644
--- a/tests/baselines/reference/strictTupleLength.errors.txt
+++ b/tests/baselines/reference/strictTupleLength.errors.txt
@@ -1,14 +1,11 @@
-tests/cases/conformance/types/tuple/strictTupleLength.ts(1,9): error TS1122: A tuple type element list cannot be empty.
 tests/cases/conformance/types/tuple/strictTupleLength.ts(11,5): error TS2403: Subsequent variable declarations must have the same type.  Variable 't1' must be of type '[number]', but here has type '[number, number]'.
 tests/cases/conformance/types/tuple/strictTupleLength.ts(12,5): error TS2403: Subsequent variable declarations must have the same type.  Variable 't2' must be of type '[number, number]', but here has type '[number]'.
 tests/cases/conformance/types/tuple/strictTupleLength.ts(18,1): error TS2322: Type 'number[]' is not assignable to type '[number]'.
   Property '0' is missing in type 'number[]'.
 
 
-==== tests/cases/conformance/types/tuple/strictTupleLength.ts (4 errors) ====
+==== tests/cases/conformance/types/tuple/strictTupleLength.ts (3 errors) ====
     var t0: [];
-            ~~
-!!! error TS1122: A tuple type element list cannot be empty.
     var t1: [number];
     var t2: [number, number];
     var arr: number[];
diff --git a/tests/baselines/reference/tupleTypes.errors.txt b/tests/baselines/reference/tupleTypes.errors.txt
index 16a8f66ba79a3..e2b73b7613acd 100644
--- a/tests/baselines/reference/tupleTypes.errors.txt
+++ b/tests/baselines/reference/tupleTypes.errors.txt
@@ -1,6 +1,5 @@
-tests/cases/compiler/tupleTypes.ts(1,9): error TS1122: A tuple type element list cannot be empty.
-tests/cases/compiler/tupleTypes.ts(14,1): error TS2322: Type 'undefined[]' is not assignable to type '[number, string]'.
-  Property '0' is missing in type 'undefined[]'.
+tests/cases/compiler/tupleTypes.ts(14,1): error TS2322: Type '[]' is not assignable to type '[number, string]'.
+  Property '0' is missing in type '[]'.
 tests/cases/compiler/tupleTypes.ts(15,1): error TS2322: Type '[number]' is not assignable to type '[number, string]'.
   Property '1' is missing in type '[number]'.
 tests/cases/compiler/tupleTypes.ts(17,1): error TS2322: Type '[string, number]' is not assignable to type '[number, string]'.
@@ -8,7 +7,7 @@ tests/cases/compiler/tupleTypes.ts(17,1): error TS2322: Type '[string, number]'
 tests/cases/compiler/tupleTypes.ts(18,1): error TS2322: Type '[number, string, number]' is not assignable to type '[number, string]'.
   Types of property 'length' are incompatible.
     Type '3' is not assignable to type '2'.
-tests/cases/compiler/tupleTypes.ts(41,1): error TS2322: Type 'undefined[]' is not assignable to type '[number, string]'.
+tests/cases/compiler/tupleTypes.ts(41,1): error TS2322: Type '[]' is not assignable to type '[number, string]'.
 tests/cases/compiler/tupleTypes.ts(47,1): error TS2322: Type '[number, string]' is not assignable to type 'number[]'.
   Types of property 'pop' are incompatible.
     Type '() => string | number' is not assignable to type '() => number'.
@@ -25,10 +24,8 @@ tests/cases/compiler/tupleTypes.ts(51,1): error TS2322: Type '[number, {}]' is n
   Type '{}' is not assignable to type 'string'.
 
 
-==== tests/cases/compiler/tupleTypes.ts (10 errors) ====
+==== tests/cases/compiler/tupleTypes.ts (9 errors) ====
     var v1: [];  // Error
-            ~~
-!!! error TS1122: A tuple type element list cannot be empty.
     var v2: [number];
     var v3: [number, string];
     var v4: [number, [string, string]];
@@ -43,8 +40,8 @@ tests/cases/compiler/tupleTypes.ts(51,1): error TS2322: Type '[number, {}]' is n
     
     t = [];               // Error
     ~
-!!! error TS2322: Type 'undefined[]' is not assignable to type '[number, string]'.
-!!! error TS2322:   Property '0' is missing in type 'undefined[]'.
+!!! error TS2322: Type '[]' is not assignable to type '[number, string]'.
+!!! error TS2322:   Property '0' is missing in type '[]'.
     t = [1];              // Error
     ~
 !!! error TS2322: Type '[number]' is not assignable to type '[number, string]'.
@@ -83,7 +80,7 @@ tests/cases/compiler/tupleTypes.ts(51,1): error TS2322: Type '[number, {}]' is n
     tt = [undefined, undefined];
     tt = [];  // Error
     ~~
-!!! error TS2322: Type 'undefined[]' is not assignable to type '[number, string]'.
+!!! error TS2322: Type '[]' is not assignable to type '[number, string]'.
     
     var a: number[];
     var a1: [number, string];
diff --git a/tests/baselines/reference/tupleTypes.types b/tests/baselines/reference/tupleTypes.types
index 3f68d4c7e2d53..2bedb1143127d 100644
--- a/tests/baselines/reference/tupleTypes.types
+++ b/tests/baselines/reference/tupleTypes.types
@@ -42,9 +42,9 @@ var t2: number|string;
 >t2 : string | number
 
 t = [];               // Error
->t = [] : undefined[]
+>t = [] : []
 >t : [number, string]
->[] : undefined[]
+>[] : []
 
 t = [1];              // Error
 >t = [1] : [number]
@@ -188,9 +188,9 @@ tt = [undefined, undefined];
 >undefined : undefined
 
 tt = [];  // Error
->tt = [] : undefined[]
+>tt = [] : []
 >tt : [number, string]
->[] : undefined[]
+>[] : []
 
 var a: number[];
 >a : number[]

From c69e4e7aff4c46197dcc55bfbfc677c4dbf4142d Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Mon, 11 Jun 2018 06:12:39 -0700
Subject: [PATCH 05/37] Expand rest parameter with tuple types when emitting
 signatures

---
 src/compiler/checker.ts | 40 ++++++++++++++++++++++++++++------------
 src/compiler/types.ts   |  5 +++--
 2 files changed, 31 insertions(+), 14 deletions(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 98c1f5c8a962b..584728c7c6c6e 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -3627,7 +3627,7 @@ namespace ts {
                     typeParameters = signature.typeParameters && signature.typeParameters.map(parameter => typeParameterToDeclaration(parameter, context));
                 }
 
-                const parameters = signature.parameters.map(parameter => symbolToParameterDeclaration(parameter, context, kind === SyntaxKind.Constructor));
+                const parameters = getExpandedParameters(signature).map(parameter => symbolToParameterDeclaration(parameter, context, kind === SyntaxKind.Constructor));
                 if (signature.thisParameter) {
                     const thisParameter = symbolToParameterDeclaration(signature.thisParameter, context);
                     parameters.unshift(thisParameter);
@@ -3696,7 +3696,7 @@ namespace ts {
                 const parameterTypeNode = typeToTypeNodeHelper(parameterType, context);
 
                 const modifiers = !(context.flags & NodeBuilderFlags.OmitParameterModifiers) && preserveModifierFlags && parameterDeclaration && parameterDeclaration.modifiers ? parameterDeclaration.modifiers.map(getSynthesizedClone) : undefined;
-                const isRest = parameterDeclaration ? isRestParameter(parameterDeclaration) : (parameterSymbol as TransientSymbol).isRestParameter;
+                const isRest = parameterDeclaration && isRestParameter(parameterDeclaration) || getCheckFlags(parameterSymbol) & CheckFlags.RestParameter;
                 const dotDotDotToken = isRest ? createToken(SyntaxKind.DotDotDotToken) : undefined;
                 const name = parameterDeclaration
                     ? parameterDeclaration.name ?
@@ -3705,7 +3705,8 @@ namespace ts {
                             cloneBindingName(parameterDeclaration.name) :
                         symbolName(parameterSymbol)
                     : symbolName(parameterSymbol);
-                const questionToken = parameterDeclaration && isOptionalParameter(parameterDeclaration) ? createToken(SyntaxKind.QuestionToken) : undefined;
+                const isOptional = parameterDeclaration && isOptionalParameter(parameterDeclaration) || getCheckFlags(parameterSymbol) & CheckFlags.OptionalParameter;
+                const questionToken = isOptional ? createToken(SyntaxKind.QuestionToken) : undefined;
                 const parameterNode = createParameter(
                     /*decorators*/ undefined,
                     modifiers,
@@ -6198,6 +6199,27 @@ namespace ts {
                 /*resolvedTypePredicate*/ undefined, sig.minArgumentCount, sig.hasRestParameter, sig.hasLiteralTypes);
         }
 
+        function getExpandedParameters(sig: Signature): Symbol[] {
+            if (sig.hasRestParameter) {
+                const restIndex = sig.parameters.length - 1;
+                const restParameter = sig.parameters[restIndex];
+                const restType = getTypeOfSymbol(restParameter);
+                if (isTupleType(restType)) {
+                    const elementTypes = (<TypeReference>restType).typeArguments || emptyArray;
+                    const minLength = (<TupleType>(<TypeReference>restType).target).minLength;
+                    const restParams = map(elementTypes, (t, i) => {
+                        const name = restParameter.escapedName + "_" + i as __String;
+                        const checkFlags = i >= minLength ? CheckFlags.OptionalParameter : 0;
+                        const symbol = createSymbol(SymbolFlags.FunctionScopedVariable, name, checkFlags);
+                        symbol.type = t;
+                        return symbol;
+                    });
+                    return concatenate(sig.parameters.slice(0, restIndex), restParams);
+                }
+            }
+            return sig.parameters;
+        }
+
         function getDefaultConstructSignatures(classType: InterfaceType): Signature[] {
             const baseConstructorType = getBaseConstructorTypeOfClass(classType);
             const baseSignatures = getSignaturesOfType(baseConstructorType, SignatureKind.Construct);
@@ -7376,9 +7398,8 @@ namespace ts {
             const lastParamVariadicType = firstDefined(lastParamTags, p =>
                 p.typeExpression && isJSDocVariadicType(p.typeExpression.type) ? p.typeExpression.type : undefined);
 
-            const syntheticArgsSymbol = createSymbol(SymbolFlags.Variable, "args" as __String);
+            const syntheticArgsSymbol = createSymbol(SymbolFlags.Variable, "args" as __String, CheckFlags.RestParameter);
             syntheticArgsSymbol.type = lastParamVariadicType ? createArrayType(getTypeFromTypeNode(lastParamVariadicType.type)) : anyArrayType;
-            syntheticArgsSymbol.isRestParameter = true;
             if (lastParamVariadicType) {
                 // Replace the last parameter with a rest parameter.
                 parameters.pop();
@@ -9716,7 +9737,7 @@ namespace ts {
             }
             // Keep the flags from the symbol we're instantiating.  Mark that is instantiated, and
             // also transient so that we can just store data on it directly.
-            const result = createSymbol(symbol.flags, symbol.escapedName, CheckFlags.Instantiated | (getCheckFlags(symbol) & CheckFlags.Late));
+            const result = createSymbol(symbol.flags, symbol.escapedName, CheckFlags.Instantiated | getCheckFlags(symbol) & (CheckFlags.Late | CheckFlags.OptionalParameter | CheckFlags.RestParameter));
             result.declarations = symbol.declarations;
             result.parent = symbol.parent;
             result.target = symbol;
@@ -9727,11 +9748,6 @@ namespace ts {
             if (symbol.nameType) {
                 result.nameType = symbol.nameType;
             }
-            if (isTransientSymbol(symbol)) {
-                if (symbol.isRestParameter) {
-                    result.isRestParameter = symbol.isRestParameter;
-                }
-            }
             return result;
         }
 
@@ -21034,7 +21050,7 @@ namespace ts {
         }
 
         function isRestParameterType(type: Type) {
-            return isArrayType(type) || type.flags & TypeFlags.TypeParameter && isArrayType(getConstraintOfType(type) || unknownType);
+            return isArrayType(type) || isTupleType(type) || type.flags & TypeFlags.TypeParameter && isArrayType(getBaseConstraintOfType(type) || unknownType);
         }
 
         function checkParameter(node: ParameterDeclaration) {
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index e5f601ccc9d57..ba88dec8ce59d 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -3548,14 +3548,15 @@ namespace ts {
         ContainsPrivate   = 1 << 8,         // Synthetic property with private constituent(s)
         ContainsStatic    = 1 << 9,         // Synthetic property with static constituent(s)
         Late              = 1 << 10,        // Late-bound symbol for a computed property with a dynamic name
-        ReverseMapped     = 1 << 11,        // property of reverse-inferred homomorphic mapped type.
+        ReverseMapped     = 1 << 11,        // Property of reverse-inferred homomorphic mapped type
+        OptionalParameter = 1 << 12,        // Optional parameter
+        RestParameter     = 1 << 13,        // Rest parameter
         Synthetic = SyntheticProperty | SyntheticMethod
     }
 
     /* @internal */
     export interface TransientSymbol extends Symbol, SymbolLinks {
         checkFlags: CheckFlags;
-        isRestParameter?: boolean;
     }
 
     /* @internal */

From 73e008d14694feb7df6e33288bec76af0de53f6e Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Mon, 11 Jun 2018 06:13:24 -0700
Subject: [PATCH 06/37] Accept new baselines

---
 .../reference/destructuringParameterDeclaration4.errors.txt  | 5 +----
 .../reference/destructuringParameterDeclaration4.types       | 2 +-
 tests/baselines/reference/iterableArrayPattern25.types       | 4 ++--
 .../reference/restParameterWithBindingPattern2.types         | 2 +-
 4 files changed, 5 insertions(+), 8 deletions(-)

diff --git a/tests/baselines/reference/destructuringParameterDeclaration4.errors.txt b/tests/baselines/reference/destructuringParameterDeclaration4.errors.txt
index cdc7938d1af64..6cd6c92ca62d6 100644
--- a/tests/baselines/reference/destructuringParameterDeclaration4.errors.txt
+++ b/tests/baselines/reference/destructuringParameterDeclaration4.errors.txt
@@ -1,4 +1,3 @@
-tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration4.ts(11,13): error TS2370: A rest parameter must be of an array type.
 tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration4.ts(13,13): error TS2370: A rest parameter must be of an array type.
 tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration4.ts(14,17): error TS1047: A rest parameter cannot be optional.
 tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration4.ts(15,16): error TS1048: A rest parameter cannot have an initializer.
@@ -17,7 +16,7 @@ tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration4.ts(
 tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration4.ts(34,28): error TS2304: Cannot find name 'E'.
 
 
-==== tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration4.ts (12 errors) ====
+==== tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration4.ts (11 errors) ====
     // If the parameter is a rest parameter, the parameter type is any[]
     // A type annotation for a rest parameter must denote an array type.
     
@@ -29,8 +28,6 @@ tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration4.ts(
     type stringOrNumArray = Array<String|Number>;
     
     function a0(...x: [number, number, string]) { }  // Error, rest parameter must be array type
-                ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS2370: A rest parameter must be of an array type.
     function a1(...x: (number|string)[]) { }
     function a2(...a: someArray) { }  // Error, rest parameter must be array type
                 ~~~~~~~~~~~~~~~
diff --git a/tests/baselines/reference/destructuringParameterDeclaration4.types b/tests/baselines/reference/destructuringParameterDeclaration4.types
index feae425d20991..5ad05a4820480 100644
--- a/tests/baselines/reference/destructuringParameterDeclaration4.types
+++ b/tests/baselines/reference/destructuringParameterDeclaration4.types
@@ -22,7 +22,7 @@ type stringOrNumArray = Array<String|Number>;
 >Number : Number
 
 function a0(...x: [number, number, string]) { }  // Error, rest parameter must be array type
->a0 : (...x: [number, number, string]) => void
+>a0 : (x_0: number, x_1: number, x_2: string) => void
 >x : [number, number, string]
 
 function a1(...x: (number|string)[]) { }
diff --git a/tests/baselines/reference/iterableArrayPattern25.types b/tests/baselines/reference/iterableArrayPattern25.types
index c9d94679603ff..6fe3412c01142 100644
--- a/tests/baselines/reference/iterableArrayPattern25.types
+++ b/tests/baselines/reference/iterableArrayPattern25.types
@@ -1,6 +1,6 @@
 === tests/cases/conformance/es6/destructuring/iterableArrayPattern25.ts ===
 function takeFirstTwoEntries(...[[k1, v1], [k2, v2]]) { }
->takeFirstTwoEntries : (...[[k1, v1], [k2, v2]]: [[any, any], [any, any]]) => void
+>takeFirstTwoEntries : (__0_0: [any, any], __0_1: [any, any]) => void
 >k1 : any
 >v1 : any
 >k2 : any
@@ -8,7 +8,7 @@ function takeFirstTwoEntries(...[[k1, v1], [k2, v2]]) { }
 
 takeFirstTwoEntries(new Map([["", 0], ["hello", 1]]));
 >takeFirstTwoEntries(new Map([["", 0], ["hello", 1]])) : void
->takeFirstTwoEntries : (...[[k1, v1], [k2, v2]]: [[any, any], [any, any]]) => void
+>takeFirstTwoEntries : (__0_0: [any, any], __0_1: [any, any]) => void
 >new Map([["", 0], ["hello", 1]]) : Map<string, number>
 >Map : MapConstructor
 >[["", 0], ["hello", 1]] : [string, number][]
diff --git a/tests/baselines/reference/restParameterWithBindingPattern2.types b/tests/baselines/reference/restParameterWithBindingPattern2.types
index 36465495b3650..7f46273a4972e 100644
--- a/tests/baselines/reference/restParameterWithBindingPattern2.types
+++ b/tests/baselines/reference/restParameterWithBindingPattern2.types
@@ -1,6 +1,6 @@
 === tests/cases/compiler/restParameterWithBindingPattern2.ts ===
 function a(...[a, b]) { }
->a : (...[a, b]: [any, any]) => void
+>a : (__0_0: any, __0_1: any) => void
 >a : any
 >b : any
 

From 7aee647a9db105da36a3209179cac55ebc956855 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Mon, 11 Jun 2018 07:18:10 -0700
Subject: [PATCH 07/37] Record parameter names in inferred tuple types

---
 src/compiler/checker.ts | 35 ++++++++++++++++++++++-------------
 src/compiler/types.ts   |  1 +
 2 files changed, 23 insertions(+), 13 deletions(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 584728c7c6c6e..49779351abf8e 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -6208,7 +6208,7 @@ namespace ts {
                     const elementTypes = (<TypeReference>restType).typeArguments || emptyArray;
                     const minLength = (<TupleType>(<TypeReference>restType).target).minLength;
                     const restParams = map(elementTypes, (t, i) => {
-                        const name = restParameter.escapedName + "_" + i as __String;
+                        const name = getParameterNameAtPosition(sig, restIndex + i);
                         const checkFlags = i >= minLength ? CheckFlags.OptionalParameter : 0;
                         const symbol = createSymbol(SymbolFlags.FunctionScopedVariable, name, checkFlags);
                         symbol.type = t;
@@ -8275,7 +8275,7 @@ namespace ts {
         //
         // Note that the generic type created by this function has no symbol associated with it. The same
         // is true for each of the synthesized type parameters.
-        function createTupleTypeOfArity(arity: number, minLength: number): TupleType {
+        function createTupleTypeOfArity(arity: number, minLength: number, associatedNames: __String[] | undefined): TupleType {
             let typeParameters: TypeParameter[] | undefined;
             const properties: Symbol[] = [];
             if (arity) {
@@ -8308,20 +8308,21 @@ namespace ts {
             type.declaredStringIndexInfo = undefined;
             type.declaredNumberIndexInfo = undefined;
             type.minLength = minLength;
+            type.associatedNames = associatedNames;
             return type;
         }
 
-        function getTupleTypeOfArity(arity: number, minLength: number): GenericType {
-            const key = arity + "," + minLength;
+        function getTupleTypeOfArity(arity: number, minLength: number, associatedNames?: __String[]): GenericType {
+            const key = arity + "," + minLength + (associatedNames && associatedNames.length ? "," + associatedNames.join(",") : "");
             let type = tupleTypes.get(key);
             if (!type) {
-                tupleTypes.set(key, type = createTupleTypeOfArity(arity, minLength));
+                tupleTypes.set(key, type = createTupleTypeOfArity(arity, minLength, associatedNames));
             }
             return type;
         }
 
-        function createTupleType(elementTypes: Type[], minLength = elementTypes.length) {
-            const tupleType = getTupleTypeOfArity(elementTypes.length, minLength);
+        function createTupleType(elementTypes: Type[], minLength = elementTypes.length, associatedNames?: __String[]) {
+            const tupleType = getTupleTypeOfArity(elementTypes.length, minLength, associatedNames);
             return elementTypes.length ? createTypeReference(tupleType, elementTypes) : tupleType;
         }
 
@@ -10207,7 +10208,8 @@ namespace ts {
                 if (!related) {
                     if (reportErrors) {
                         errorReporter!(Diagnostics.Types_of_parameters_0_and_1_are_incompatible,
-                            getParameterNameAtPosition(source, i), getParameterNameAtPosition(target, i));
+                            unescapeLeadingUnderscores(getParameterNameAtPosition(source, i)),
+                            unescapeLeadingUnderscores(getParameterNameAtPosition(target, i)));
                     }
                     return Ternary.False;
                 }
@@ -12365,13 +12367,15 @@ namespace ts {
                     callback(sourceRest, targetRest);
                 }
                 else {
-                    const types: Type[] = [];
+                    const types = [];
+                    const names = [];
                     for (let i = paramCount; i < sourceCount; i++) {
                         types.push(getTypeAtPosition(source, i));
+                        names.push(getParameterNameAtPosition(source, i));
                     }
                     const minArgumentCount = getMinArgumentCount(source);
                     const minLength = minArgumentCount < paramCount ? 0 : minArgumentCount - paramCount;
-                    const rest = hasEffectiveRestParameter(source) ? createArrayType(getUnionType(types)) : createTupleType(types, minLength);
+                    const rest = hasEffectiveRestParameter(source) ? createArrayType(getUnionType(types)) : createTupleType(types, minLength, names);
                     callback(rest, targetRest);
                 }
             }
@@ -19382,11 +19386,16 @@ namespace ts {
         function getParameterNameAtPosition(signature: Signature, pos: number) {
             const paramCount = signature.parameters.length - (signature.hasRestParameter ? 1 : 0);
             if (pos < paramCount) {
-                return symbolName(signature.parameters[pos]);
+                return signature.parameters[pos].escapedName;
             }
             const restParameter = signature.parameters[paramCount] || unknownSymbol;
-            const restName = symbolName(restParameter);
-            return isTupleType(getTypeOfSymbol(restParameter)) ? `${restName}[${pos - paramCount}]` : restName;
+            const restType = getTypeOfSymbol(restParameter);
+            if (isTupleType(restType)) {
+                const associatedNames = (<TupleType>(<TypeReference>restType).target).associatedNames;
+                const index = pos - paramCount;
+                return associatedNames ? associatedNames[index] : restParameter.escapedName + "_" + index as __String;
+            }
+            return restParameter.escapedName;
         }
 
         function getTypeAtPosition(signature: Signature, pos: number): Type {
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index ba88dec8ce59d..ff30d4e3442ec 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -3894,6 +3894,7 @@ namespace ts {
 
     export interface TupleType extends GenericType {
         minLength: number;
+        associatedNames?: __String[];
     }
 
     export interface UnionOrIntersectionType extends Type {

From 9ae93713ae34f4176204059a02b820213397d0e7 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Mon, 11 Jun 2018 07:21:03 -0700
Subject: [PATCH 08/37] Fix lint errors

---
 src/compiler/checker.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 49779351abf8e..468ac0c8c2099 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -7564,7 +7564,7 @@ namespace ts {
         }
 
         function getRestTypeOfSignature(signature: Signature) {
-            let type = getTypeOfRestParameter(signature);
+            const type = getTypeOfRestParameter(signature);
             return type && getIndexTypeOfType(type, IndexKind.Number) || anyType;
         }
 
@@ -17876,7 +17876,7 @@ namespace ts {
                 const arg = getEffectiveArgument(node, args, i);
                 // If the effective argument is 'undefined', then it is an argument that is present but is synthetic.
                 if (arg === undefined || arg.kind !== SyntaxKind.OmittedExpression) {
-                    let paramType = getTypeAtPosition(signature, i);
+                    const paramType = getTypeAtPosition(signature, i);
                     let argType = getEffectiveArgumentType(node, i);
                     // If the effective argument type is 'undefined', there is no synthetic type
                     // for the argument. In that case, we should check the argument.

From e239f86d3faced2dcd88f9b35f24f88327421cfb Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Mon, 11 Jun 2018 14:01:16 -0700
Subject: [PATCH 09/37] Flatten spread expressions of tuple types

---
 src/compiler/checker.ts | 24 ++++++++++++++++++++++--
 src/compiler/types.ts   |  6 ++++++
 2 files changed, 28 insertions(+), 2 deletions(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 468ac0c8c2099..5a3bca1896c6c 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -18097,7 +18097,25 @@ namespace ts {
                 return node.attributes.properties.length > 0 ? [node.attributes] : emptyArray;
             }
             else {
-                return node.arguments || emptyArray;
+                const args = node.arguments || emptyArray;
+                const length = args.length;
+                if (length && args[length - 1].kind === SyntaxKind.SpreadElement && getSpreadArgumentIndex(args) === length - 1) {
+                    // We have a spread argument in the last position and no other spread arguments. If the type
+                    // of the argument is a tuple type, spread the tuple elements into the argument list. We can
+                    // call checkExpressionCached because spread expressions never have a contextual type.
+                    const spreadArgument = <SpreadElement>args[length - 1];
+                    const type = checkExpressionCached(spreadArgument.expression);
+                    if (isTupleType(type)) {
+                        const syntheticArgs = map((<TypeReference>type).typeArguments || emptyArray, t => {
+                            const arg = <SyntheticExpression>createNode(SyntaxKind.SyntheticExpression, spreadArgument.pos, spreadArgument.end);
+                            arg.parent = spreadArgument;
+                            arg.type = t;
+                            return arg;
+                        });
+                        return concatenate(args.slice(0, length - 1), syntheticArgs);
+                    }
+                }
+                return args;
             }
         }
 
@@ -21015,6 +21033,8 @@ namespace ts {
                     return undefinedWideningType;
                 case SyntaxKind.YieldExpression:
                     return checkYieldExpression(<YieldExpression>node);
+                case SyntaxKind.SyntheticExpression:
+                    return (<SyntheticExpression>node).type;
                 case SyntaxKind.JsxExpression:
                     return checkJsxExpression(<JsxExpression>node, checkMode);
                 case SyntaxKind.JsxElement:
@@ -21059,7 +21079,7 @@ namespace ts {
         }
 
         function isRestParameterType(type: Type) {
-            return isArrayType(type) || isTupleType(type) || type.flags & TypeFlags.TypeParameter && isArrayType(getBaseConstraintOfType(type) || unknownType);
+            return isArrayType(type) || isTupleType(type) || type.flags & TypeFlags.Instantiable && isTypeAssignableTo(type, anyArrayType);
         }
 
         function checkParameter(node: ParameterDeclaration) {
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index ff30d4e3442ec..da8b44ccbe8ae 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -320,6 +320,7 @@ namespace ts {
         AsExpression,
         NonNullExpression,
         MetaProperty,
+        SyntheticExpression,
 
         // Misc
         TemplateSpan,
@@ -1338,6 +1339,11 @@ namespace ts {
         expression?: Expression;
     }
 
+    export interface SyntheticExpression extends Expression {
+        kind: SyntaxKind.SyntheticExpression;
+        type: Type;
+    }
+
     // see: https://tc39.github.io/ecma262/#prod-ExponentiationExpression
     export type ExponentiationOperator
         = SyntaxKind.AsteriskAsteriskToken

From 0b0a91a7bfa278f7cdf37422ecca590524b92c1f Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Mon, 11 Jun 2018 14:01:49 -0700
Subject: [PATCH 10/37] Accept new baselines

---
 .../reference/callWithSpread2.errors.txt      | 24 +++++++------------
 1 file changed, 9 insertions(+), 15 deletions(-)

diff --git a/tests/baselines/reference/callWithSpread2.errors.txt b/tests/baselines/reference/callWithSpread2.errors.txt
index 9028d37af0906..4333571ebf862 100644
--- a/tests/baselines/reference/callWithSpread2.errors.txt
+++ b/tests/baselines/reference/callWithSpread2.errors.txt
@@ -2,19 +2,16 @@ tests/cases/conformance/expressions/functionCalls/callWithSpread2.ts(22,1): erro
 tests/cases/conformance/expressions/functionCalls/callWithSpread2.ts(23,1): error TS2556: Expected 0 arguments, but got 1 or more.
 tests/cases/conformance/expressions/functionCalls/callWithSpread2.ts(26,5): error TS2345: Argument of type 'string | number' is not assignable to parameter of type 'number'.
   Type 'string' is not assignable to type 'number'.
-tests/cases/conformance/expressions/functionCalls/callWithSpread2.ts(27,5): error TS2345: Argument of type 'string | number' is not assignable to parameter of type 'number'.
-  Type 'string' is not assignable to type 'number'.
+tests/cases/conformance/expressions/functionCalls/callWithSpread2.ts(27,5): error TS2345: Argument of type 'string' is not assignable to parameter of type 'number'.
 tests/cases/conformance/expressions/functionCalls/callWithSpread2.ts(28,13): error TS2345: Argument of type 'string | number' is not assignable to parameter of type 'number'.
   Type 'string' is not assignable to type 'number'.
-tests/cases/conformance/expressions/functionCalls/callWithSpread2.ts(29,13): error TS2345: Argument of type 'string | number' is not assignable to parameter of type 'number'.
-  Type 'string' is not assignable to type 'number'.
+tests/cases/conformance/expressions/functionCalls/callWithSpread2.ts(29,13): error TS2345: Argument of type 'string' is not assignable to parameter of type 'number'.
 tests/cases/conformance/expressions/functionCalls/callWithSpread2.ts(30,11): error TS2345: Argument of type 'string | number' is not assignable to parameter of type 'number'.
   Type 'string' is not assignable to type 'number'.
-tests/cases/conformance/expressions/functionCalls/callWithSpread2.ts(31,11): error TS2345: Argument of type 'string | number' is not assignable to parameter of type 'number'.
-  Type 'string' is not assignable to type 'number'.
+tests/cases/conformance/expressions/functionCalls/callWithSpread2.ts(31,11): error TS2345: Argument of type 'string' is not assignable to parameter of type 'number'.
 tests/cases/conformance/expressions/functionCalls/callWithSpread2.ts(32,1): error TS2556: Expected 1-3 arguments, but got 0 or more.
 tests/cases/conformance/expressions/functionCalls/callWithSpread2.ts(33,1): error TS2556: Expected 1-3 arguments, but got 0 or more.
-tests/cases/conformance/expressions/functionCalls/callWithSpread2.ts(34,1): error TS2556: Expected 1-3 arguments, but got 0 or more.
+tests/cases/conformance/expressions/functionCalls/callWithSpread2.ts(34,8): error TS2345: Argument of type 'number' is not assignable to parameter of type 'string'.
 
 
 ==== tests/cases/conformance/expressions/functionCalls/callWithSpread2.ts (11 errors) ====
@@ -53,24 +50,21 @@ tests/cases/conformance/expressions/functionCalls/callWithSpread2.ts(34,1): erro
 !!! error TS2345:   Type 'string' is not assignable to type 'number'.
     all(...tuple)
         ~~~~~~~~
-!!! error TS2345: Argument of type 'string | number' is not assignable to parameter of type 'number'.
-!!! error TS2345:   Type 'string' is not assignable to type 'number'.
+!!! error TS2345: Argument of type 'string' is not assignable to parameter of type 'number'.
     prefix("b", ...mixed)
                 ~~~~~~~~
 !!! error TS2345: Argument of type 'string | number' is not assignable to parameter of type 'number'.
 !!! error TS2345:   Type 'string' is not assignable to type 'number'.
     prefix("c", ...tuple)
                 ~~~~~~~~
-!!! error TS2345: Argument of type 'string | number' is not assignable to parameter of type 'number'.
-!!! error TS2345:   Type 'string' is not assignable to type 'number'.
+!!! error TS2345: Argument of type 'string' is not assignable to parameter of type 'number'.
     rest("e", ...mixed)
               ~~~~~~~~
 !!! error TS2345: Argument of type 'string | number' is not assignable to parameter of type 'number'.
 !!! error TS2345:   Type 'string' is not assignable to type 'number'.
     rest("f", ...tuple)
               ~~~~~~~~
-!!! error TS2345: Argument of type 'string | number' is not assignable to parameter of type 'number'.
-!!! error TS2345:   Type 'string' is not assignable to type 'number'.
+!!! error TS2345: Argument of type 'string' is not assignable to parameter of type 'number'.
     prefix(...ns) // required parameters are required
     ~~~~~~~~~~~~~
 !!! error TS2556: Expected 1-3 arguments, but got 0 or more.
@@ -78,6 +72,6 @@ tests/cases/conformance/expressions/functionCalls/callWithSpread2.ts(34,1): erro
     ~~~~~~~~~~~~~~~~
 !!! error TS2556: Expected 1-3 arguments, but got 0 or more.
     prefix(...tuple)
-    ~~~~~~~~~~~~~~~~
-!!! error TS2556: Expected 1-3 arguments, but got 0 or more.
+           ~~~~~~~~
+!!! error TS2345: Argument of type 'number' is not assignable to parameter of type 'string'.
     
\ No newline at end of file

From 5245642530671a02275ef78e513f3b522b103336 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Mon, 11 Jun 2018 14:02:00 -0700
Subject: [PATCH 11/37] Accept baseline API changes

---
 .../reference/api/tsserverlibrary.d.ts        | 204 +++++++++---------
 tests/baselines/reference/api/typescript.d.ts | 204 +++++++++---------
 2 files changed, 210 insertions(+), 198 deletions(-)

diff --git a/tests/baselines/reference/api/tsserverlibrary.d.ts b/tests/baselines/reference/api/tsserverlibrary.d.ts
index 837497afc846c..3c34c4fd3f557 100644
--- a/tests/baselines/reference/api/tsserverlibrary.d.ts
+++ b/tests/baselines/reference/api/tsserverlibrary.d.ts
@@ -274,101 +274,102 @@ declare namespace ts {
         AsExpression = 209,
         NonNullExpression = 210,
         MetaProperty = 211,
-        TemplateSpan = 212,
-        SemicolonClassElement = 213,
-        Block = 214,
-        VariableStatement = 215,
-        EmptyStatement = 216,
-        ExpressionStatement = 217,
-        IfStatement = 218,
-        DoStatement = 219,
-        WhileStatement = 220,
-        ForStatement = 221,
-        ForInStatement = 222,
-        ForOfStatement = 223,
-        ContinueStatement = 224,
-        BreakStatement = 225,
-        ReturnStatement = 226,
-        WithStatement = 227,
-        SwitchStatement = 228,
-        LabeledStatement = 229,
-        ThrowStatement = 230,
-        TryStatement = 231,
-        DebuggerStatement = 232,
-        VariableDeclaration = 233,
-        VariableDeclarationList = 234,
-        FunctionDeclaration = 235,
-        ClassDeclaration = 236,
-        InterfaceDeclaration = 237,
-        TypeAliasDeclaration = 238,
-        EnumDeclaration = 239,
-        ModuleDeclaration = 240,
-        ModuleBlock = 241,
-        CaseBlock = 242,
-        NamespaceExportDeclaration = 243,
-        ImportEqualsDeclaration = 244,
-        ImportDeclaration = 245,
-        ImportClause = 246,
-        NamespaceImport = 247,
-        NamedImports = 248,
-        ImportSpecifier = 249,
-        ExportAssignment = 250,
-        ExportDeclaration = 251,
-        NamedExports = 252,
-        ExportSpecifier = 253,
-        MissingDeclaration = 254,
-        ExternalModuleReference = 255,
-        JsxElement = 256,
-        JsxSelfClosingElement = 257,
-        JsxOpeningElement = 258,
-        JsxClosingElement = 259,
-        JsxFragment = 260,
-        JsxOpeningFragment = 261,
-        JsxClosingFragment = 262,
-        JsxAttribute = 263,
-        JsxAttributes = 264,
-        JsxSpreadAttribute = 265,
-        JsxExpression = 266,
-        CaseClause = 267,
-        DefaultClause = 268,
-        HeritageClause = 269,
-        CatchClause = 270,
-        PropertyAssignment = 271,
-        ShorthandPropertyAssignment = 272,
-        SpreadAssignment = 273,
-        EnumMember = 274,
-        SourceFile = 275,
-        Bundle = 276,
-        UnparsedSource = 277,
-        InputFiles = 278,
-        JSDocTypeExpression = 279,
-        JSDocAllType = 280,
-        JSDocUnknownType = 281,
-        JSDocNullableType = 282,
-        JSDocNonNullableType = 283,
-        JSDocOptionalType = 284,
-        JSDocFunctionType = 285,
-        JSDocVariadicType = 286,
-        JSDocComment = 287,
-        JSDocTypeLiteral = 288,
-        JSDocSignature = 289,
-        JSDocTag = 290,
-        JSDocAugmentsTag = 291,
-        JSDocClassTag = 292,
-        JSDocCallbackTag = 293,
-        JSDocParameterTag = 294,
-        JSDocReturnTag = 295,
-        JSDocTypeTag = 296,
-        JSDocTemplateTag = 297,
-        JSDocTypedefTag = 298,
-        JSDocPropertyTag = 299,
-        SyntaxList = 300,
-        NotEmittedStatement = 301,
-        PartiallyEmittedExpression = 302,
-        CommaListExpression = 303,
-        MergeDeclarationMarker = 304,
-        EndOfDeclarationMarker = 305,
-        Count = 306,
+        SyntheticExpression = 212,
+        TemplateSpan = 213,
+        SemicolonClassElement = 214,
+        Block = 215,
+        VariableStatement = 216,
+        EmptyStatement = 217,
+        ExpressionStatement = 218,
+        IfStatement = 219,
+        DoStatement = 220,
+        WhileStatement = 221,
+        ForStatement = 222,
+        ForInStatement = 223,
+        ForOfStatement = 224,
+        ContinueStatement = 225,
+        BreakStatement = 226,
+        ReturnStatement = 227,
+        WithStatement = 228,
+        SwitchStatement = 229,
+        LabeledStatement = 230,
+        ThrowStatement = 231,
+        TryStatement = 232,
+        DebuggerStatement = 233,
+        VariableDeclaration = 234,
+        VariableDeclarationList = 235,
+        FunctionDeclaration = 236,
+        ClassDeclaration = 237,
+        InterfaceDeclaration = 238,
+        TypeAliasDeclaration = 239,
+        EnumDeclaration = 240,
+        ModuleDeclaration = 241,
+        ModuleBlock = 242,
+        CaseBlock = 243,
+        NamespaceExportDeclaration = 244,
+        ImportEqualsDeclaration = 245,
+        ImportDeclaration = 246,
+        ImportClause = 247,
+        NamespaceImport = 248,
+        NamedImports = 249,
+        ImportSpecifier = 250,
+        ExportAssignment = 251,
+        ExportDeclaration = 252,
+        NamedExports = 253,
+        ExportSpecifier = 254,
+        MissingDeclaration = 255,
+        ExternalModuleReference = 256,
+        JsxElement = 257,
+        JsxSelfClosingElement = 258,
+        JsxOpeningElement = 259,
+        JsxClosingElement = 260,
+        JsxFragment = 261,
+        JsxOpeningFragment = 262,
+        JsxClosingFragment = 263,
+        JsxAttribute = 264,
+        JsxAttributes = 265,
+        JsxSpreadAttribute = 266,
+        JsxExpression = 267,
+        CaseClause = 268,
+        DefaultClause = 269,
+        HeritageClause = 270,
+        CatchClause = 271,
+        PropertyAssignment = 272,
+        ShorthandPropertyAssignment = 273,
+        SpreadAssignment = 274,
+        EnumMember = 275,
+        SourceFile = 276,
+        Bundle = 277,
+        UnparsedSource = 278,
+        InputFiles = 279,
+        JSDocTypeExpression = 280,
+        JSDocAllType = 281,
+        JSDocUnknownType = 282,
+        JSDocNullableType = 283,
+        JSDocNonNullableType = 284,
+        JSDocOptionalType = 285,
+        JSDocFunctionType = 286,
+        JSDocVariadicType = 287,
+        JSDocComment = 288,
+        JSDocTypeLiteral = 289,
+        JSDocSignature = 290,
+        JSDocTag = 291,
+        JSDocAugmentsTag = 292,
+        JSDocClassTag = 293,
+        JSDocCallbackTag = 294,
+        JSDocParameterTag = 295,
+        JSDocReturnTag = 296,
+        JSDocTypeTag = 297,
+        JSDocTemplateTag = 298,
+        JSDocTypedefTag = 299,
+        JSDocPropertyTag = 300,
+        SyntaxList = 301,
+        NotEmittedStatement = 302,
+        PartiallyEmittedExpression = 303,
+        CommaListExpression = 304,
+        MergeDeclarationMarker = 305,
+        EndOfDeclarationMarker = 306,
+        Count = 307,
         FirstAssignment = 58,
         LastAssignment = 70,
         FirstCompoundAssignment = 59,
@@ -394,10 +395,10 @@ declare namespace ts {
         FirstBinaryOperator = 27,
         LastBinaryOperator = 70,
         FirstNode = 146,
-        FirstJSDocNode = 279,
-        LastJSDocNode = 299,
-        FirstJSDocTagNode = 290,
-        LastJSDocTagNode = 299
+        FirstJSDocNode = 280,
+        LastJSDocNode = 300,
+        FirstJSDocTagNode = 291,
+        LastJSDocTagNode = 300
     }
     enum NodeFlags {
         None = 0,
@@ -880,6 +881,10 @@ declare namespace ts {
         asteriskToken?: AsteriskToken;
         expression?: Expression;
     }
+    interface SyntheticExpression extends Expression {
+        kind: SyntaxKind.SyntheticExpression;
+        type: Type;
+    }
     type ExponentiationOperator = SyntaxKind.AsteriskAsteriskToken;
     type MultiplicativeOperator = SyntaxKind.AsteriskToken | SyntaxKind.SlashToken | SyntaxKind.PercentToken;
     type MultiplicativeOperatorOrHigher = ExponentiationOperator | MultiplicativeOperator;
@@ -2256,6 +2261,7 @@ declare namespace ts {
     }
     interface TupleType extends GenericType {
         minLength: number;
+        associatedNames?: __String[];
     }
     interface UnionOrIntersectionType extends Type {
         types: Type[];
diff --git a/tests/baselines/reference/api/typescript.d.ts b/tests/baselines/reference/api/typescript.d.ts
index 8a3315927a373..6a4109b28375b 100644
--- a/tests/baselines/reference/api/typescript.d.ts
+++ b/tests/baselines/reference/api/typescript.d.ts
@@ -274,101 +274,102 @@ declare namespace ts {
         AsExpression = 209,
         NonNullExpression = 210,
         MetaProperty = 211,
-        TemplateSpan = 212,
-        SemicolonClassElement = 213,
-        Block = 214,
-        VariableStatement = 215,
-        EmptyStatement = 216,
-        ExpressionStatement = 217,
-        IfStatement = 218,
-        DoStatement = 219,
-        WhileStatement = 220,
-        ForStatement = 221,
-        ForInStatement = 222,
-        ForOfStatement = 223,
-        ContinueStatement = 224,
-        BreakStatement = 225,
-        ReturnStatement = 226,
-        WithStatement = 227,
-        SwitchStatement = 228,
-        LabeledStatement = 229,
-        ThrowStatement = 230,
-        TryStatement = 231,
-        DebuggerStatement = 232,
-        VariableDeclaration = 233,
-        VariableDeclarationList = 234,
-        FunctionDeclaration = 235,
-        ClassDeclaration = 236,
-        InterfaceDeclaration = 237,
-        TypeAliasDeclaration = 238,
-        EnumDeclaration = 239,
-        ModuleDeclaration = 240,
-        ModuleBlock = 241,
-        CaseBlock = 242,
-        NamespaceExportDeclaration = 243,
-        ImportEqualsDeclaration = 244,
-        ImportDeclaration = 245,
-        ImportClause = 246,
-        NamespaceImport = 247,
-        NamedImports = 248,
-        ImportSpecifier = 249,
-        ExportAssignment = 250,
-        ExportDeclaration = 251,
-        NamedExports = 252,
-        ExportSpecifier = 253,
-        MissingDeclaration = 254,
-        ExternalModuleReference = 255,
-        JsxElement = 256,
-        JsxSelfClosingElement = 257,
-        JsxOpeningElement = 258,
-        JsxClosingElement = 259,
-        JsxFragment = 260,
-        JsxOpeningFragment = 261,
-        JsxClosingFragment = 262,
-        JsxAttribute = 263,
-        JsxAttributes = 264,
-        JsxSpreadAttribute = 265,
-        JsxExpression = 266,
-        CaseClause = 267,
-        DefaultClause = 268,
-        HeritageClause = 269,
-        CatchClause = 270,
-        PropertyAssignment = 271,
-        ShorthandPropertyAssignment = 272,
-        SpreadAssignment = 273,
-        EnumMember = 274,
-        SourceFile = 275,
-        Bundle = 276,
-        UnparsedSource = 277,
-        InputFiles = 278,
-        JSDocTypeExpression = 279,
-        JSDocAllType = 280,
-        JSDocUnknownType = 281,
-        JSDocNullableType = 282,
-        JSDocNonNullableType = 283,
-        JSDocOptionalType = 284,
-        JSDocFunctionType = 285,
-        JSDocVariadicType = 286,
-        JSDocComment = 287,
-        JSDocTypeLiteral = 288,
-        JSDocSignature = 289,
-        JSDocTag = 290,
-        JSDocAugmentsTag = 291,
-        JSDocClassTag = 292,
-        JSDocCallbackTag = 293,
-        JSDocParameterTag = 294,
-        JSDocReturnTag = 295,
-        JSDocTypeTag = 296,
-        JSDocTemplateTag = 297,
-        JSDocTypedefTag = 298,
-        JSDocPropertyTag = 299,
-        SyntaxList = 300,
-        NotEmittedStatement = 301,
-        PartiallyEmittedExpression = 302,
-        CommaListExpression = 303,
-        MergeDeclarationMarker = 304,
-        EndOfDeclarationMarker = 305,
-        Count = 306,
+        SyntheticExpression = 212,
+        TemplateSpan = 213,
+        SemicolonClassElement = 214,
+        Block = 215,
+        VariableStatement = 216,
+        EmptyStatement = 217,
+        ExpressionStatement = 218,
+        IfStatement = 219,
+        DoStatement = 220,
+        WhileStatement = 221,
+        ForStatement = 222,
+        ForInStatement = 223,
+        ForOfStatement = 224,
+        ContinueStatement = 225,
+        BreakStatement = 226,
+        ReturnStatement = 227,
+        WithStatement = 228,
+        SwitchStatement = 229,
+        LabeledStatement = 230,
+        ThrowStatement = 231,
+        TryStatement = 232,
+        DebuggerStatement = 233,
+        VariableDeclaration = 234,
+        VariableDeclarationList = 235,
+        FunctionDeclaration = 236,
+        ClassDeclaration = 237,
+        InterfaceDeclaration = 238,
+        TypeAliasDeclaration = 239,
+        EnumDeclaration = 240,
+        ModuleDeclaration = 241,
+        ModuleBlock = 242,
+        CaseBlock = 243,
+        NamespaceExportDeclaration = 244,
+        ImportEqualsDeclaration = 245,
+        ImportDeclaration = 246,
+        ImportClause = 247,
+        NamespaceImport = 248,
+        NamedImports = 249,
+        ImportSpecifier = 250,
+        ExportAssignment = 251,
+        ExportDeclaration = 252,
+        NamedExports = 253,
+        ExportSpecifier = 254,
+        MissingDeclaration = 255,
+        ExternalModuleReference = 256,
+        JsxElement = 257,
+        JsxSelfClosingElement = 258,
+        JsxOpeningElement = 259,
+        JsxClosingElement = 260,
+        JsxFragment = 261,
+        JsxOpeningFragment = 262,
+        JsxClosingFragment = 263,
+        JsxAttribute = 264,
+        JsxAttributes = 265,
+        JsxSpreadAttribute = 266,
+        JsxExpression = 267,
+        CaseClause = 268,
+        DefaultClause = 269,
+        HeritageClause = 270,
+        CatchClause = 271,
+        PropertyAssignment = 272,
+        ShorthandPropertyAssignment = 273,
+        SpreadAssignment = 274,
+        EnumMember = 275,
+        SourceFile = 276,
+        Bundle = 277,
+        UnparsedSource = 278,
+        InputFiles = 279,
+        JSDocTypeExpression = 280,
+        JSDocAllType = 281,
+        JSDocUnknownType = 282,
+        JSDocNullableType = 283,
+        JSDocNonNullableType = 284,
+        JSDocOptionalType = 285,
+        JSDocFunctionType = 286,
+        JSDocVariadicType = 287,
+        JSDocComment = 288,
+        JSDocTypeLiteral = 289,
+        JSDocSignature = 290,
+        JSDocTag = 291,
+        JSDocAugmentsTag = 292,
+        JSDocClassTag = 293,
+        JSDocCallbackTag = 294,
+        JSDocParameterTag = 295,
+        JSDocReturnTag = 296,
+        JSDocTypeTag = 297,
+        JSDocTemplateTag = 298,
+        JSDocTypedefTag = 299,
+        JSDocPropertyTag = 300,
+        SyntaxList = 301,
+        NotEmittedStatement = 302,
+        PartiallyEmittedExpression = 303,
+        CommaListExpression = 304,
+        MergeDeclarationMarker = 305,
+        EndOfDeclarationMarker = 306,
+        Count = 307,
         FirstAssignment = 58,
         LastAssignment = 70,
         FirstCompoundAssignment = 59,
@@ -394,10 +395,10 @@ declare namespace ts {
         FirstBinaryOperator = 27,
         LastBinaryOperator = 70,
         FirstNode = 146,
-        FirstJSDocNode = 279,
-        LastJSDocNode = 299,
-        FirstJSDocTagNode = 290,
-        LastJSDocTagNode = 299
+        FirstJSDocNode = 280,
+        LastJSDocNode = 300,
+        FirstJSDocTagNode = 291,
+        LastJSDocTagNode = 300
     }
     enum NodeFlags {
         None = 0,
@@ -880,6 +881,10 @@ declare namespace ts {
         asteriskToken?: AsteriskToken;
         expression?: Expression;
     }
+    interface SyntheticExpression extends Expression {
+        kind: SyntaxKind.SyntheticExpression;
+        type: Type;
+    }
     type ExponentiationOperator = SyntaxKind.AsteriskAsteriskToken;
     type MultiplicativeOperator = SyntaxKind.AsteriskToken | SyntaxKind.SlashToken | SyntaxKind.PercentToken;
     type MultiplicativeOperatorOrHigher = ExponentiationOperator | MultiplicativeOperator;
@@ -2256,6 +2261,7 @@ declare namespace ts {
     }
     interface TupleType extends GenericType {
         minLength: number;
+        associatedNames?: __String[];
     }
     interface UnionOrIntersectionType extends Type {
         types: Type[];

From dee51ed78b5685658b1362b0c3296c5d346d2c3f Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Tue, 12 Jun 2018 06:47:34 -0700
Subject: [PATCH 12/37] Accept baseline changes in APIs

---
 .../reference/APISample_Watch.errors.txt      | 210 +++++++++---------
 .../APISample_WatchWithDefaults.errors.txt    | 210 +++++++++---------
 ...APISample_WatchWithOwnWatchHost.errors.txt | 210 +++++++++---------
 .../reference/APISample_compile.errors.txt    | 210 +++++++++---------
 .../reference/APISample_jsdoc.errors.txt      | 210 +++++++++---------
 .../reference/APISample_linter.errors.txt     | 210 +++++++++---------
 .../APISample_parseConfig.errors.txt          | 210 +++++++++---------
 .../reference/APISample_transform.errors.txt  | 210 +++++++++---------
 .../reference/APISample_watcher.errors.txt    | 210 +++++++++---------
 .../reference/api/tsserverlibrary.d.ts        |  14 +-
 tests/baselines/reference/api/typescript.d.ts |  14 +-
 11 files changed, 959 insertions(+), 959 deletions(-)

diff --git a/tests/baselines/reference/APISample_Watch.errors.txt b/tests/baselines/reference/APISample_Watch.errors.txt
index bb02ed2b9a2dc..90827110dbb93 100644
--- a/tests/baselines/reference/APISample_Watch.errors.txt
+++ b/tests/baselines/reference/APISample_Watch.errors.txt
@@ -1,91 +1,75 @@
 typescript_standalone.d.ts(21,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(21,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(8910,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(8910,42): error TS1005: ';' expected.
-typescript_standalone.d.ts(9170,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9170,46): error TS1005: ';' expected.
-typescript_standalone.d.ts(9520,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9520,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(9544,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9544,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(9631,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9631,38): error TS1005: ';' expected.
-typescript_standalone.d.ts(10796,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10796,57): error TS1005: ';' expected.
-typescript_standalone.d.ts(10807,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10807,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(10817,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10817,48): error TS1005: ';' expected.
-typescript_standalone.d.ts(10892,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10892,47): error TS1005: ';' expected.
-typescript_standalone.d.ts(10949,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10949,47): error TS1005: ';' expected.
-typescript_standalone.d.ts(11003,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11003,52): error TS1005: ';' expected.
-typescript_standalone.d.ts(11023,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11023,44): error TS1005: ';' expected.
-typescript_standalone.d.ts(11033,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11033,35): error TS1005: ';' expected.
-typescript_standalone.d.ts(11067,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11067,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11070,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11070,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11074,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11074,45): error TS1005: ';' expected.
-typescript_standalone.d.ts(11092,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11092,56): error TS1005: ';' expected.
-typescript_standalone.d.ts(11118,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11118,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(11121,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11121,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11133,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11133,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11163,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11163,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11197,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11197,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11208,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11208,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11232,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11232,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11240,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11240,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11244,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11244,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11274,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11274,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11317,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11317,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(11504,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11504,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11506,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11506,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11510,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11510,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11512,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11512,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11514,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11514,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11516,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11516,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11518,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11518,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11527,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11527,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11529,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11529,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11531,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11531,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11533,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11533,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11535,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11535,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11537,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11537,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11539,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11539,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11541,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11541,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(8926,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(8926,42): error TS1005: ';' expected.
+typescript_standalone.d.ts(9186,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(9186,46): error TS1005: ';' expected.
+typescript_standalone.d.ts(9536,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(9536,36): error TS1005: ';' expected.
+typescript_standalone.d.ts(9560,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(9560,36): error TS1005: ';' expected.
+typescript_standalone.d.ts(9647,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(9647,38): error TS1005: ';' expected.
+typescript_standalone.d.ts(10812,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(10812,57): error TS1005: ';' expected.
+typescript_standalone.d.ts(10823,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(10823,41): error TS1005: ';' expected.
+typescript_standalone.d.ts(10833,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(10833,48): error TS1005: ';' expected.
+typescript_standalone.d.ts(10908,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(10908,47): error TS1005: ';' expected.
+typescript_standalone.d.ts(10965,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(10965,47): error TS1005: ';' expected.
+typescript_standalone.d.ts(11019,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11019,52): error TS1005: ';' expected.
+typescript_standalone.d.ts(11039,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11039,44): error TS1005: ';' expected.
+typescript_standalone.d.ts(11049,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11049,35): error TS1005: ';' expected.
+typescript_standalone.d.ts(11083,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11083,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11086,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11086,43): error TS1005: ';' expected.
+typescript_standalone.d.ts(11090,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11090,45): error TS1005: ';' expected.
+typescript_standalone.d.ts(11108,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11108,56): error TS1005: ';' expected.
+typescript_standalone.d.ts(11134,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11134,36): error TS1005: ';' expected.
+typescript_standalone.d.ts(11137,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11137,43): error TS1005: ';' expected.
+typescript_standalone.d.ts(11149,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11149,43): error TS1005: ';' expected.
+typescript_standalone.d.ts(11179,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11179,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11213,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11213,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11224,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11224,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11248,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11248,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11256,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11256,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11260,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11260,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11290,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11290,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11333,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11333,41): error TS1005: ';' expected.
+typescript_standalone.d.ts(11520,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11520,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11522,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11522,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11526,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11526,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11528,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11528,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11530,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11530,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11532,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11532,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11534,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11534,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11543,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11543,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11545,28): error TS1005: ';' expected.
@@ -100,6 +84,14 @@ typescript_standalone.d.ts(11553,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11553,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11555,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11555,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11557,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11557,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11559,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11559,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11561,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11561,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11563,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11563,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11565,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11565,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11567,28): error TS1005: ';' expected.
@@ -108,26 +100,34 @@ typescript_standalone.d.ts(11569,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11569,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11571,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11571,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11573,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11573,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11575,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11575,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11577,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11577,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11579,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11579,72): error TS1005: ';' expected.
 typescript_standalone.d.ts(11581,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11581,52): error TS1005: ';' expected.
-typescript_standalone.d.ts(11653,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11653,72): error TS1005: ';' expected.
-typescript_standalone.d.ts(11655,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11655,38): error TS1005: ';' expected.
-typescript_standalone.d.ts(11657,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11657,71): error TS1005: ';' expected.
-typescript_standalone.d.ts(11659,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11659,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11735,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11735,48): error TS1005: ';' expected.
+typescript_standalone.d.ts(11581,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11583,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11583,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11585,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11585,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11587,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11587,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11589,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11589,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11591,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11591,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11593,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11593,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11595,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11595,72): error TS1005: ';' expected.
+typescript_standalone.d.ts(11597,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11597,52): error TS1005: ';' expected.
+typescript_standalone.d.ts(11669,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11669,72): error TS1005: ';' expected.
+typescript_standalone.d.ts(11671,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11671,38): error TS1005: ';' expected.
+typescript_standalone.d.ts(11673,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11673,71): error TS1005: ';' expected.
+typescript_standalone.d.ts(11675,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11675,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11751,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11751,48): error TS1005: ';' expected.
 
 
 ==== tests/cases/compiler/APISample_Watch.ts (0 errors) ====
diff --git a/tests/baselines/reference/APISample_WatchWithDefaults.errors.txt b/tests/baselines/reference/APISample_WatchWithDefaults.errors.txt
index 8f1d89b484575..3dad20dc09e25 100644
--- a/tests/baselines/reference/APISample_WatchWithDefaults.errors.txt
+++ b/tests/baselines/reference/APISample_WatchWithDefaults.errors.txt
@@ -1,91 +1,75 @@
 typescript_standalone.d.ts(21,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(21,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(8910,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(8910,42): error TS1005: ';' expected.
-typescript_standalone.d.ts(9170,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9170,46): error TS1005: ';' expected.
-typescript_standalone.d.ts(9520,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9520,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(9544,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9544,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(9631,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9631,38): error TS1005: ';' expected.
-typescript_standalone.d.ts(10796,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10796,57): error TS1005: ';' expected.
-typescript_standalone.d.ts(10807,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10807,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(10817,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10817,48): error TS1005: ';' expected.
-typescript_standalone.d.ts(10892,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10892,47): error TS1005: ';' expected.
-typescript_standalone.d.ts(10949,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10949,47): error TS1005: ';' expected.
-typescript_standalone.d.ts(11003,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11003,52): error TS1005: ';' expected.
-typescript_standalone.d.ts(11023,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11023,44): error TS1005: ';' expected.
-typescript_standalone.d.ts(11033,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11033,35): error TS1005: ';' expected.
-typescript_standalone.d.ts(11067,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11067,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11070,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11070,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11074,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11074,45): error TS1005: ';' expected.
-typescript_standalone.d.ts(11092,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11092,56): error TS1005: ';' expected.
-typescript_standalone.d.ts(11118,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11118,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(11121,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11121,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11133,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11133,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11163,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11163,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11197,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11197,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11208,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11208,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11232,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11232,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11240,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11240,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11244,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11244,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11274,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11274,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11317,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11317,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(11504,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11504,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11506,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11506,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11510,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11510,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11512,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11512,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11514,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11514,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11516,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11516,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11518,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11518,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11527,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11527,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11529,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11529,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11531,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11531,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11533,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11533,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11535,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11535,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11537,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11537,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11539,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11539,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11541,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11541,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(8926,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(8926,42): error TS1005: ';' expected.
+typescript_standalone.d.ts(9186,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(9186,46): error TS1005: ';' expected.
+typescript_standalone.d.ts(9536,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(9536,36): error TS1005: ';' expected.
+typescript_standalone.d.ts(9560,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(9560,36): error TS1005: ';' expected.
+typescript_standalone.d.ts(9647,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(9647,38): error TS1005: ';' expected.
+typescript_standalone.d.ts(10812,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(10812,57): error TS1005: ';' expected.
+typescript_standalone.d.ts(10823,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(10823,41): error TS1005: ';' expected.
+typescript_standalone.d.ts(10833,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(10833,48): error TS1005: ';' expected.
+typescript_standalone.d.ts(10908,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(10908,47): error TS1005: ';' expected.
+typescript_standalone.d.ts(10965,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(10965,47): error TS1005: ';' expected.
+typescript_standalone.d.ts(11019,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11019,52): error TS1005: ';' expected.
+typescript_standalone.d.ts(11039,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11039,44): error TS1005: ';' expected.
+typescript_standalone.d.ts(11049,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11049,35): error TS1005: ';' expected.
+typescript_standalone.d.ts(11083,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11083,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11086,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11086,43): error TS1005: ';' expected.
+typescript_standalone.d.ts(11090,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11090,45): error TS1005: ';' expected.
+typescript_standalone.d.ts(11108,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11108,56): error TS1005: ';' expected.
+typescript_standalone.d.ts(11134,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11134,36): error TS1005: ';' expected.
+typescript_standalone.d.ts(11137,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11137,43): error TS1005: ';' expected.
+typescript_standalone.d.ts(11149,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11149,43): error TS1005: ';' expected.
+typescript_standalone.d.ts(11179,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11179,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11213,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11213,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11224,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11224,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11248,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11248,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11256,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11256,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11260,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11260,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11290,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11290,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11333,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11333,41): error TS1005: ';' expected.
+typescript_standalone.d.ts(11520,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11520,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11522,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11522,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11526,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11526,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11528,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11528,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11530,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11530,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11532,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11532,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11534,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11534,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11543,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11543,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11545,28): error TS1005: ';' expected.
@@ -100,6 +84,14 @@ typescript_standalone.d.ts(11553,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11553,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11555,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11555,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11557,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11557,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11559,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11559,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11561,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11561,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11563,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11563,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11565,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11565,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11567,28): error TS1005: ';' expected.
@@ -108,26 +100,34 @@ typescript_standalone.d.ts(11569,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11569,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11571,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11571,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11573,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11573,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11575,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11575,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11577,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11577,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11579,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11579,72): error TS1005: ';' expected.
 typescript_standalone.d.ts(11581,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11581,52): error TS1005: ';' expected.
-typescript_standalone.d.ts(11653,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11653,72): error TS1005: ';' expected.
-typescript_standalone.d.ts(11655,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11655,38): error TS1005: ';' expected.
-typescript_standalone.d.ts(11657,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11657,71): error TS1005: ';' expected.
-typescript_standalone.d.ts(11659,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11659,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11735,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11735,48): error TS1005: ';' expected.
+typescript_standalone.d.ts(11581,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11583,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11583,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11585,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11585,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11587,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11587,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11589,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11589,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11591,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11591,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11593,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11593,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11595,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11595,72): error TS1005: ';' expected.
+typescript_standalone.d.ts(11597,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11597,52): error TS1005: ';' expected.
+typescript_standalone.d.ts(11669,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11669,72): error TS1005: ';' expected.
+typescript_standalone.d.ts(11671,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11671,38): error TS1005: ';' expected.
+typescript_standalone.d.ts(11673,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11673,71): error TS1005: ';' expected.
+typescript_standalone.d.ts(11675,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11675,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11751,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11751,48): error TS1005: ';' expected.
 
 
 ==== tests/cases/compiler/APISample_WatchWithDefaults.ts (0 errors) ====
diff --git a/tests/baselines/reference/APISample_WatchWithOwnWatchHost.errors.txt b/tests/baselines/reference/APISample_WatchWithOwnWatchHost.errors.txt
index ee60b5c0d9ff7..7616283940ab8 100644
--- a/tests/baselines/reference/APISample_WatchWithOwnWatchHost.errors.txt
+++ b/tests/baselines/reference/APISample_WatchWithOwnWatchHost.errors.txt
@@ -1,91 +1,75 @@
 typescript_standalone.d.ts(21,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(21,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(8910,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(8910,42): error TS1005: ';' expected.
-typescript_standalone.d.ts(9170,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9170,46): error TS1005: ';' expected.
-typescript_standalone.d.ts(9520,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9520,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(9544,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9544,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(9631,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9631,38): error TS1005: ';' expected.
-typescript_standalone.d.ts(10796,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10796,57): error TS1005: ';' expected.
-typescript_standalone.d.ts(10807,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10807,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(10817,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10817,48): error TS1005: ';' expected.
-typescript_standalone.d.ts(10892,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10892,47): error TS1005: ';' expected.
-typescript_standalone.d.ts(10949,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10949,47): error TS1005: ';' expected.
-typescript_standalone.d.ts(11003,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11003,52): error TS1005: ';' expected.
-typescript_standalone.d.ts(11023,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11023,44): error TS1005: ';' expected.
-typescript_standalone.d.ts(11033,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11033,35): error TS1005: ';' expected.
-typescript_standalone.d.ts(11067,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11067,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11070,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11070,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11074,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11074,45): error TS1005: ';' expected.
-typescript_standalone.d.ts(11092,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11092,56): error TS1005: ';' expected.
-typescript_standalone.d.ts(11118,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11118,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(11121,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11121,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11133,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11133,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11163,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11163,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11197,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11197,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11208,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11208,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11232,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11232,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11240,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11240,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11244,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11244,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11274,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11274,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11317,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11317,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(11504,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11504,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11506,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11506,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11510,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11510,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11512,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11512,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11514,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11514,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11516,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11516,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11518,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11518,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11527,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11527,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11529,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11529,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11531,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11531,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11533,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11533,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11535,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11535,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11537,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11537,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11539,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11539,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11541,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11541,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(8926,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(8926,42): error TS1005: ';' expected.
+typescript_standalone.d.ts(9186,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(9186,46): error TS1005: ';' expected.
+typescript_standalone.d.ts(9536,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(9536,36): error TS1005: ';' expected.
+typescript_standalone.d.ts(9560,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(9560,36): error TS1005: ';' expected.
+typescript_standalone.d.ts(9647,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(9647,38): error TS1005: ';' expected.
+typescript_standalone.d.ts(10812,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(10812,57): error TS1005: ';' expected.
+typescript_standalone.d.ts(10823,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(10823,41): error TS1005: ';' expected.
+typescript_standalone.d.ts(10833,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(10833,48): error TS1005: ';' expected.
+typescript_standalone.d.ts(10908,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(10908,47): error TS1005: ';' expected.
+typescript_standalone.d.ts(10965,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(10965,47): error TS1005: ';' expected.
+typescript_standalone.d.ts(11019,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11019,52): error TS1005: ';' expected.
+typescript_standalone.d.ts(11039,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11039,44): error TS1005: ';' expected.
+typescript_standalone.d.ts(11049,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11049,35): error TS1005: ';' expected.
+typescript_standalone.d.ts(11083,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11083,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11086,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11086,43): error TS1005: ';' expected.
+typescript_standalone.d.ts(11090,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11090,45): error TS1005: ';' expected.
+typescript_standalone.d.ts(11108,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11108,56): error TS1005: ';' expected.
+typescript_standalone.d.ts(11134,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11134,36): error TS1005: ';' expected.
+typescript_standalone.d.ts(11137,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11137,43): error TS1005: ';' expected.
+typescript_standalone.d.ts(11149,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11149,43): error TS1005: ';' expected.
+typescript_standalone.d.ts(11179,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11179,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11213,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11213,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11224,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11224,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11248,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11248,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11256,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11256,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11260,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11260,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11290,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11290,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11333,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11333,41): error TS1005: ';' expected.
+typescript_standalone.d.ts(11520,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11520,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11522,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11522,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11526,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11526,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11528,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11528,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11530,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11530,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11532,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11532,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11534,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11534,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11543,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11543,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11545,28): error TS1005: ';' expected.
@@ -100,6 +84,14 @@ typescript_standalone.d.ts(11553,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11553,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11555,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11555,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11557,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11557,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11559,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11559,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11561,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11561,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11563,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11563,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11565,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11565,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11567,28): error TS1005: ';' expected.
@@ -108,26 +100,34 @@ typescript_standalone.d.ts(11569,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11569,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11571,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11571,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11573,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11573,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11575,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11575,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11577,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11577,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11579,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11579,72): error TS1005: ';' expected.
 typescript_standalone.d.ts(11581,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11581,52): error TS1005: ';' expected.
-typescript_standalone.d.ts(11653,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11653,72): error TS1005: ';' expected.
-typescript_standalone.d.ts(11655,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11655,38): error TS1005: ';' expected.
-typescript_standalone.d.ts(11657,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11657,71): error TS1005: ';' expected.
-typescript_standalone.d.ts(11659,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11659,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11735,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11735,48): error TS1005: ';' expected.
+typescript_standalone.d.ts(11581,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11583,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11583,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11585,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11585,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11587,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11587,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11589,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11589,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11591,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11591,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11593,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11593,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11595,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11595,72): error TS1005: ';' expected.
+typescript_standalone.d.ts(11597,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11597,52): error TS1005: ';' expected.
+typescript_standalone.d.ts(11669,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11669,72): error TS1005: ';' expected.
+typescript_standalone.d.ts(11671,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11671,38): error TS1005: ';' expected.
+typescript_standalone.d.ts(11673,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11673,71): error TS1005: ';' expected.
+typescript_standalone.d.ts(11675,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11675,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11751,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11751,48): error TS1005: ';' expected.
 
 
 ==== tests/cases/compiler/APISample_WatchWithOwnWatchHost.ts (0 errors) ====
diff --git a/tests/baselines/reference/APISample_compile.errors.txt b/tests/baselines/reference/APISample_compile.errors.txt
index 2b730ac576f3b..050230e7cffc1 100644
--- a/tests/baselines/reference/APISample_compile.errors.txt
+++ b/tests/baselines/reference/APISample_compile.errors.txt
@@ -1,91 +1,75 @@
 typescript_standalone.d.ts(21,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(21,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(8910,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(8910,42): error TS1005: ';' expected.
-typescript_standalone.d.ts(9170,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9170,46): error TS1005: ';' expected.
-typescript_standalone.d.ts(9520,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9520,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(9544,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9544,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(9631,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9631,38): error TS1005: ';' expected.
-typescript_standalone.d.ts(10796,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10796,57): error TS1005: ';' expected.
-typescript_standalone.d.ts(10807,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10807,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(10817,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10817,48): error TS1005: ';' expected.
-typescript_standalone.d.ts(10892,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10892,47): error TS1005: ';' expected.
-typescript_standalone.d.ts(10949,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10949,47): error TS1005: ';' expected.
-typescript_standalone.d.ts(11003,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11003,52): error TS1005: ';' expected.
-typescript_standalone.d.ts(11023,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11023,44): error TS1005: ';' expected.
-typescript_standalone.d.ts(11033,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11033,35): error TS1005: ';' expected.
-typescript_standalone.d.ts(11067,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11067,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11070,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11070,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11074,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11074,45): error TS1005: ';' expected.
-typescript_standalone.d.ts(11092,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11092,56): error TS1005: ';' expected.
-typescript_standalone.d.ts(11118,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11118,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(11121,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11121,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11133,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11133,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11163,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11163,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11197,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11197,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11208,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11208,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11232,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11232,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11240,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11240,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11244,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11244,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11274,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11274,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11317,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11317,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(11504,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11504,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11506,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11506,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11510,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11510,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11512,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11512,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11514,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11514,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11516,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11516,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11518,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11518,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11527,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11527,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11529,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11529,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11531,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11531,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11533,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11533,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11535,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11535,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11537,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11537,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11539,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11539,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11541,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11541,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(8926,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(8926,42): error TS1005: ';' expected.
+typescript_standalone.d.ts(9186,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(9186,46): error TS1005: ';' expected.
+typescript_standalone.d.ts(9536,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(9536,36): error TS1005: ';' expected.
+typescript_standalone.d.ts(9560,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(9560,36): error TS1005: ';' expected.
+typescript_standalone.d.ts(9647,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(9647,38): error TS1005: ';' expected.
+typescript_standalone.d.ts(10812,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(10812,57): error TS1005: ';' expected.
+typescript_standalone.d.ts(10823,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(10823,41): error TS1005: ';' expected.
+typescript_standalone.d.ts(10833,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(10833,48): error TS1005: ';' expected.
+typescript_standalone.d.ts(10908,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(10908,47): error TS1005: ';' expected.
+typescript_standalone.d.ts(10965,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(10965,47): error TS1005: ';' expected.
+typescript_standalone.d.ts(11019,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11019,52): error TS1005: ';' expected.
+typescript_standalone.d.ts(11039,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11039,44): error TS1005: ';' expected.
+typescript_standalone.d.ts(11049,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11049,35): error TS1005: ';' expected.
+typescript_standalone.d.ts(11083,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11083,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11086,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11086,43): error TS1005: ';' expected.
+typescript_standalone.d.ts(11090,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11090,45): error TS1005: ';' expected.
+typescript_standalone.d.ts(11108,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11108,56): error TS1005: ';' expected.
+typescript_standalone.d.ts(11134,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11134,36): error TS1005: ';' expected.
+typescript_standalone.d.ts(11137,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11137,43): error TS1005: ';' expected.
+typescript_standalone.d.ts(11149,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11149,43): error TS1005: ';' expected.
+typescript_standalone.d.ts(11179,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11179,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11213,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11213,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11224,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11224,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11248,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11248,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11256,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11256,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11260,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11260,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11290,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11290,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11333,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11333,41): error TS1005: ';' expected.
+typescript_standalone.d.ts(11520,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11520,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11522,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11522,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11526,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11526,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11528,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11528,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11530,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11530,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11532,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11532,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11534,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11534,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11543,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11543,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11545,28): error TS1005: ';' expected.
@@ -100,6 +84,14 @@ typescript_standalone.d.ts(11553,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11553,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11555,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11555,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11557,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11557,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11559,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11559,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11561,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11561,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11563,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11563,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11565,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11565,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11567,28): error TS1005: ';' expected.
@@ -108,26 +100,34 @@ typescript_standalone.d.ts(11569,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11569,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11571,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11571,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11573,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11573,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11575,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11575,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11577,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11577,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11579,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11579,72): error TS1005: ';' expected.
 typescript_standalone.d.ts(11581,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11581,52): error TS1005: ';' expected.
-typescript_standalone.d.ts(11653,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11653,72): error TS1005: ';' expected.
-typescript_standalone.d.ts(11655,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11655,38): error TS1005: ';' expected.
-typescript_standalone.d.ts(11657,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11657,71): error TS1005: ';' expected.
-typescript_standalone.d.ts(11659,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11659,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11735,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11735,48): error TS1005: ';' expected.
+typescript_standalone.d.ts(11581,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11583,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11583,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11585,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11585,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11587,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11587,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11589,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11589,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11591,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11591,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11593,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11593,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11595,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11595,72): error TS1005: ';' expected.
+typescript_standalone.d.ts(11597,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11597,52): error TS1005: ';' expected.
+typescript_standalone.d.ts(11669,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11669,72): error TS1005: ';' expected.
+typescript_standalone.d.ts(11671,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11671,38): error TS1005: ';' expected.
+typescript_standalone.d.ts(11673,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11673,71): error TS1005: ';' expected.
+typescript_standalone.d.ts(11675,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11675,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11751,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11751,48): error TS1005: ';' expected.
 
 
 ==== tests/cases/compiler/APISample_compile.ts (0 errors) ====
diff --git a/tests/baselines/reference/APISample_jsdoc.errors.txt b/tests/baselines/reference/APISample_jsdoc.errors.txt
index 02ac0d0fbf57a..af33a5aa63635 100644
--- a/tests/baselines/reference/APISample_jsdoc.errors.txt
+++ b/tests/baselines/reference/APISample_jsdoc.errors.txt
@@ -1,91 +1,75 @@
 typescript_standalone.d.ts(21,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(21,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(8910,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(8910,42): error TS1005: ';' expected.
-typescript_standalone.d.ts(9170,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9170,46): error TS1005: ';' expected.
-typescript_standalone.d.ts(9520,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9520,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(9544,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9544,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(9631,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9631,38): error TS1005: ';' expected.
-typescript_standalone.d.ts(10796,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10796,57): error TS1005: ';' expected.
-typescript_standalone.d.ts(10807,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10807,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(10817,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10817,48): error TS1005: ';' expected.
-typescript_standalone.d.ts(10892,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10892,47): error TS1005: ';' expected.
-typescript_standalone.d.ts(10949,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10949,47): error TS1005: ';' expected.
-typescript_standalone.d.ts(11003,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11003,52): error TS1005: ';' expected.
-typescript_standalone.d.ts(11023,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11023,44): error TS1005: ';' expected.
-typescript_standalone.d.ts(11033,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11033,35): error TS1005: ';' expected.
-typescript_standalone.d.ts(11067,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11067,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11070,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11070,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11074,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11074,45): error TS1005: ';' expected.
-typescript_standalone.d.ts(11092,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11092,56): error TS1005: ';' expected.
-typescript_standalone.d.ts(11118,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11118,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(11121,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11121,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11133,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11133,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11163,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11163,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11197,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11197,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11208,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11208,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11232,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11232,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11240,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11240,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11244,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11244,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11274,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11274,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11317,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11317,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(11504,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11504,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11506,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11506,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11510,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11510,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11512,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11512,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11514,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11514,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11516,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11516,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11518,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11518,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11527,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11527,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11529,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11529,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11531,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11531,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11533,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11533,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11535,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11535,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11537,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11537,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11539,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11539,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11541,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11541,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(8926,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(8926,42): error TS1005: ';' expected.
+typescript_standalone.d.ts(9186,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(9186,46): error TS1005: ';' expected.
+typescript_standalone.d.ts(9536,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(9536,36): error TS1005: ';' expected.
+typescript_standalone.d.ts(9560,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(9560,36): error TS1005: ';' expected.
+typescript_standalone.d.ts(9647,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(9647,38): error TS1005: ';' expected.
+typescript_standalone.d.ts(10812,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(10812,57): error TS1005: ';' expected.
+typescript_standalone.d.ts(10823,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(10823,41): error TS1005: ';' expected.
+typescript_standalone.d.ts(10833,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(10833,48): error TS1005: ';' expected.
+typescript_standalone.d.ts(10908,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(10908,47): error TS1005: ';' expected.
+typescript_standalone.d.ts(10965,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(10965,47): error TS1005: ';' expected.
+typescript_standalone.d.ts(11019,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11019,52): error TS1005: ';' expected.
+typescript_standalone.d.ts(11039,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11039,44): error TS1005: ';' expected.
+typescript_standalone.d.ts(11049,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11049,35): error TS1005: ';' expected.
+typescript_standalone.d.ts(11083,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11083,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11086,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11086,43): error TS1005: ';' expected.
+typescript_standalone.d.ts(11090,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11090,45): error TS1005: ';' expected.
+typescript_standalone.d.ts(11108,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11108,56): error TS1005: ';' expected.
+typescript_standalone.d.ts(11134,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11134,36): error TS1005: ';' expected.
+typescript_standalone.d.ts(11137,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11137,43): error TS1005: ';' expected.
+typescript_standalone.d.ts(11149,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11149,43): error TS1005: ';' expected.
+typescript_standalone.d.ts(11179,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11179,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11213,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11213,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11224,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11224,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11248,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11248,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11256,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11256,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11260,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11260,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11290,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11290,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11333,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11333,41): error TS1005: ';' expected.
+typescript_standalone.d.ts(11520,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11520,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11522,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11522,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11526,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11526,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11528,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11528,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11530,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11530,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11532,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11532,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11534,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11534,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11543,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11543,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11545,28): error TS1005: ';' expected.
@@ -100,6 +84,14 @@ typescript_standalone.d.ts(11553,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11553,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11555,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11555,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11557,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11557,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11559,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11559,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11561,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11561,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11563,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11563,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11565,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11565,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11567,28): error TS1005: ';' expected.
@@ -108,26 +100,34 @@ typescript_standalone.d.ts(11569,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11569,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11571,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11571,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11573,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11573,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11575,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11575,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11577,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11577,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11579,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11579,72): error TS1005: ';' expected.
 typescript_standalone.d.ts(11581,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11581,52): error TS1005: ';' expected.
-typescript_standalone.d.ts(11653,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11653,72): error TS1005: ';' expected.
-typescript_standalone.d.ts(11655,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11655,38): error TS1005: ';' expected.
-typescript_standalone.d.ts(11657,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11657,71): error TS1005: ';' expected.
-typescript_standalone.d.ts(11659,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11659,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11735,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11735,48): error TS1005: ';' expected.
+typescript_standalone.d.ts(11581,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11583,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11583,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11585,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11585,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11587,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11587,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11589,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11589,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11591,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11591,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11593,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11593,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11595,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11595,72): error TS1005: ';' expected.
+typescript_standalone.d.ts(11597,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11597,52): error TS1005: ';' expected.
+typescript_standalone.d.ts(11669,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11669,72): error TS1005: ';' expected.
+typescript_standalone.d.ts(11671,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11671,38): error TS1005: ';' expected.
+typescript_standalone.d.ts(11673,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11673,71): error TS1005: ';' expected.
+typescript_standalone.d.ts(11675,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11675,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11751,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11751,48): error TS1005: ';' expected.
 
 
 ==== tests/cases/compiler/APISample_jsdoc.ts (0 errors) ====
diff --git a/tests/baselines/reference/APISample_linter.errors.txt b/tests/baselines/reference/APISample_linter.errors.txt
index 01bab05567aab..1df6775939fde 100644
--- a/tests/baselines/reference/APISample_linter.errors.txt
+++ b/tests/baselines/reference/APISample_linter.errors.txt
@@ -1,91 +1,75 @@
 typescript_standalone.d.ts(21,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(21,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(8910,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(8910,42): error TS1005: ';' expected.
-typescript_standalone.d.ts(9170,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9170,46): error TS1005: ';' expected.
-typescript_standalone.d.ts(9520,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9520,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(9544,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9544,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(9631,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9631,38): error TS1005: ';' expected.
-typescript_standalone.d.ts(10796,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10796,57): error TS1005: ';' expected.
-typescript_standalone.d.ts(10807,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10807,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(10817,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10817,48): error TS1005: ';' expected.
-typescript_standalone.d.ts(10892,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10892,47): error TS1005: ';' expected.
-typescript_standalone.d.ts(10949,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10949,47): error TS1005: ';' expected.
-typescript_standalone.d.ts(11003,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11003,52): error TS1005: ';' expected.
-typescript_standalone.d.ts(11023,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11023,44): error TS1005: ';' expected.
-typescript_standalone.d.ts(11033,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11033,35): error TS1005: ';' expected.
-typescript_standalone.d.ts(11067,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11067,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11070,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11070,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11074,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11074,45): error TS1005: ';' expected.
-typescript_standalone.d.ts(11092,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11092,56): error TS1005: ';' expected.
-typescript_standalone.d.ts(11118,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11118,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(11121,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11121,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11133,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11133,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11163,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11163,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11197,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11197,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11208,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11208,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11232,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11232,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11240,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11240,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11244,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11244,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11274,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11274,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11317,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11317,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(11504,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11504,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11506,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11506,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11510,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11510,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11512,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11512,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11514,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11514,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11516,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11516,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11518,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11518,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11527,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11527,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11529,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11529,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11531,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11531,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11533,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11533,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11535,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11535,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11537,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11537,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11539,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11539,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11541,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11541,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(8926,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(8926,42): error TS1005: ';' expected.
+typescript_standalone.d.ts(9186,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(9186,46): error TS1005: ';' expected.
+typescript_standalone.d.ts(9536,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(9536,36): error TS1005: ';' expected.
+typescript_standalone.d.ts(9560,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(9560,36): error TS1005: ';' expected.
+typescript_standalone.d.ts(9647,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(9647,38): error TS1005: ';' expected.
+typescript_standalone.d.ts(10812,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(10812,57): error TS1005: ';' expected.
+typescript_standalone.d.ts(10823,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(10823,41): error TS1005: ';' expected.
+typescript_standalone.d.ts(10833,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(10833,48): error TS1005: ';' expected.
+typescript_standalone.d.ts(10908,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(10908,47): error TS1005: ';' expected.
+typescript_standalone.d.ts(10965,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(10965,47): error TS1005: ';' expected.
+typescript_standalone.d.ts(11019,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11019,52): error TS1005: ';' expected.
+typescript_standalone.d.ts(11039,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11039,44): error TS1005: ';' expected.
+typescript_standalone.d.ts(11049,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11049,35): error TS1005: ';' expected.
+typescript_standalone.d.ts(11083,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11083,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11086,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11086,43): error TS1005: ';' expected.
+typescript_standalone.d.ts(11090,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11090,45): error TS1005: ';' expected.
+typescript_standalone.d.ts(11108,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11108,56): error TS1005: ';' expected.
+typescript_standalone.d.ts(11134,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11134,36): error TS1005: ';' expected.
+typescript_standalone.d.ts(11137,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11137,43): error TS1005: ';' expected.
+typescript_standalone.d.ts(11149,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11149,43): error TS1005: ';' expected.
+typescript_standalone.d.ts(11179,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11179,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11213,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11213,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11224,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11224,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11248,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11248,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11256,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11256,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11260,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11260,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11290,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11290,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11333,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11333,41): error TS1005: ';' expected.
+typescript_standalone.d.ts(11520,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11520,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11522,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11522,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11526,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11526,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11528,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11528,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11530,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11530,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11532,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11532,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11534,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11534,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11543,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11543,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11545,28): error TS1005: ';' expected.
@@ -100,6 +84,14 @@ typescript_standalone.d.ts(11553,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11553,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11555,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11555,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11557,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11557,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11559,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11559,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11561,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11561,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11563,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11563,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11565,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11565,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11567,28): error TS1005: ';' expected.
@@ -108,26 +100,34 @@ typescript_standalone.d.ts(11569,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11569,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11571,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11571,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11573,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11573,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11575,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11575,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11577,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11577,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11579,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11579,72): error TS1005: ';' expected.
 typescript_standalone.d.ts(11581,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11581,52): error TS1005: ';' expected.
-typescript_standalone.d.ts(11653,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11653,72): error TS1005: ';' expected.
-typescript_standalone.d.ts(11655,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11655,38): error TS1005: ';' expected.
-typescript_standalone.d.ts(11657,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11657,71): error TS1005: ';' expected.
-typescript_standalone.d.ts(11659,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11659,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11735,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11735,48): error TS1005: ';' expected.
+typescript_standalone.d.ts(11581,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11583,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11583,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11585,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11585,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11587,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11587,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11589,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11589,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11591,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11591,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11593,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11593,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11595,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11595,72): error TS1005: ';' expected.
+typescript_standalone.d.ts(11597,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11597,52): error TS1005: ';' expected.
+typescript_standalone.d.ts(11669,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11669,72): error TS1005: ';' expected.
+typescript_standalone.d.ts(11671,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11671,38): error TS1005: ';' expected.
+typescript_standalone.d.ts(11673,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11673,71): error TS1005: ';' expected.
+typescript_standalone.d.ts(11675,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11675,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11751,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11751,48): error TS1005: ';' expected.
 
 
 ==== tests/cases/compiler/APISample_linter.ts (0 errors) ====
diff --git a/tests/baselines/reference/APISample_parseConfig.errors.txt b/tests/baselines/reference/APISample_parseConfig.errors.txt
index 87f2415221006..21834a3d49d93 100644
--- a/tests/baselines/reference/APISample_parseConfig.errors.txt
+++ b/tests/baselines/reference/APISample_parseConfig.errors.txt
@@ -1,91 +1,75 @@
 typescript_standalone.d.ts(21,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(21,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(8910,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(8910,42): error TS1005: ';' expected.
-typescript_standalone.d.ts(9170,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9170,46): error TS1005: ';' expected.
-typescript_standalone.d.ts(9520,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9520,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(9544,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9544,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(9631,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9631,38): error TS1005: ';' expected.
-typescript_standalone.d.ts(10796,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10796,57): error TS1005: ';' expected.
-typescript_standalone.d.ts(10807,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10807,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(10817,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10817,48): error TS1005: ';' expected.
-typescript_standalone.d.ts(10892,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10892,47): error TS1005: ';' expected.
-typescript_standalone.d.ts(10949,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10949,47): error TS1005: ';' expected.
-typescript_standalone.d.ts(11003,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11003,52): error TS1005: ';' expected.
-typescript_standalone.d.ts(11023,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11023,44): error TS1005: ';' expected.
-typescript_standalone.d.ts(11033,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11033,35): error TS1005: ';' expected.
-typescript_standalone.d.ts(11067,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11067,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11070,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11070,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11074,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11074,45): error TS1005: ';' expected.
-typescript_standalone.d.ts(11092,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11092,56): error TS1005: ';' expected.
-typescript_standalone.d.ts(11118,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11118,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(11121,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11121,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11133,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11133,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11163,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11163,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11197,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11197,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11208,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11208,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11232,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11232,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11240,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11240,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11244,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11244,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11274,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11274,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11317,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11317,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(11504,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11504,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11506,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11506,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11510,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11510,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11512,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11512,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11514,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11514,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11516,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11516,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11518,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11518,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11527,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11527,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11529,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11529,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11531,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11531,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11533,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11533,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11535,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11535,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11537,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11537,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11539,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11539,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11541,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11541,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(8926,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(8926,42): error TS1005: ';' expected.
+typescript_standalone.d.ts(9186,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(9186,46): error TS1005: ';' expected.
+typescript_standalone.d.ts(9536,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(9536,36): error TS1005: ';' expected.
+typescript_standalone.d.ts(9560,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(9560,36): error TS1005: ';' expected.
+typescript_standalone.d.ts(9647,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(9647,38): error TS1005: ';' expected.
+typescript_standalone.d.ts(10812,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(10812,57): error TS1005: ';' expected.
+typescript_standalone.d.ts(10823,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(10823,41): error TS1005: ';' expected.
+typescript_standalone.d.ts(10833,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(10833,48): error TS1005: ';' expected.
+typescript_standalone.d.ts(10908,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(10908,47): error TS1005: ';' expected.
+typescript_standalone.d.ts(10965,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(10965,47): error TS1005: ';' expected.
+typescript_standalone.d.ts(11019,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11019,52): error TS1005: ';' expected.
+typescript_standalone.d.ts(11039,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11039,44): error TS1005: ';' expected.
+typescript_standalone.d.ts(11049,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11049,35): error TS1005: ';' expected.
+typescript_standalone.d.ts(11083,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11083,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11086,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11086,43): error TS1005: ';' expected.
+typescript_standalone.d.ts(11090,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11090,45): error TS1005: ';' expected.
+typescript_standalone.d.ts(11108,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11108,56): error TS1005: ';' expected.
+typescript_standalone.d.ts(11134,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11134,36): error TS1005: ';' expected.
+typescript_standalone.d.ts(11137,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11137,43): error TS1005: ';' expected.
+typescript_standalone.d.ts(11149,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11149,43): error TS1005: ';' expected.
+typescript_standalone.d.ts(11179,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11179,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11213,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11213,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11224,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11224,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11248,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11248,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11256,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11256,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11260,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11260,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11290,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11290,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11333,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11333,41): error TS1005: ';' expected.
+typescript_standalone.d.ts(11520,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11520,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11522,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11522,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11526,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11526,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11528,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11528,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11530,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11530,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11532,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11532,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11534,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11534,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11543,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11543,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11545,28): error TS1005: ';' expected.
@@ -100,6 +84,14 @@ typescript_standalone.d.ts(11553,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11553,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11555,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11555,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11557,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11557,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11559,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11559,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11561,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11561,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11563,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11563,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11565,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11565,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11567,28): error TS1005: ';' expected.
@@ -108,26 +100,34 @@ typescript_standalone.d.ts(11569,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11569,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11571,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11571,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11573,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11573,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11575,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11575,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11577,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11577,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11579,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11579,72): error TS1005: ';' expected.
 typescript_standalone.d.ts(11581,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11581,52): error TS1005: ';' expected.
-typescript_standalone.d.ts(11653,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11653,72): error TS1005: ';' expected.
-typescript_standalone.d.ts(11655,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11655,38): error TS1005: ';' expected.
-typescript_standalone.d.ts(11657,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11657,71): error TS1005: ';' expected.
-typescript_standalone.d.ts(11659,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11659,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11735,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11735,48): error TS1005: ';' expected.
+typescript_standalone.d.ts(11581,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11583,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11583,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11585,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11585,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11587,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11587,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11589,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11589,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11591,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11591,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11593,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11593,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11595,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11595,72): error TS1005: ';' expected.
+typescript_standalone.d.ts(11597,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11597,52): error TS1005: ';' expected.
+typescript_standalone.d.ts(11669,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11669,72): error TS1005: ';' expected.
+typescript_standalone.d.ts(11671,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11671,38): error TS1005: ';' expected.
+typescript_standalone.d.ts(11673,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11673,71): error TS1005: ';' expected.
+typescript_standalone.d.ts(11675,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11675,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11751,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11751,48): error TS1005: ';' expected.
 
 
 ==== tests/cases/compiler/APISample_parseConfig.ts (0 errors) ====
diff --git a/tests/baselines/reference/APISample_transform.errors.txt b/tests/baselines/reference/APISample_transform.errors.txt
index 3f8facbb0714c..6a27c9813e2f1 100644
--- a/tests/baselines/reference/APISample_transform.errors.txt
+++ b/tests/baselines/reference/APISample_transform.errors.txt
@@ -1,91 +1,75 @@
 typescript_standalone.d.ts(21,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(21,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(8910,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(8910,42): error TS1005: ';' expected.
-typescript_standalone.d.ts(9170,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9170,46): error TS1005: ';' expected.
-typescript_standalone.d.ts(9520,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9520,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(9544,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9544,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(9631,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9631,38): error TS1005: ';' expected.
-typescript_standalone.d.ts(10796,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10796,57): error TS1005: ';' expected.
-typescript_standalone.d.ts(10807,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10807,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(10817,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10817,48): error TS1005: ';' expected.
-typescript_standalone.d.ts(10892,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10892,47): error TS1005: ';' expected.
-typescript_standalone.d.ts(10949,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10949,47): error TS1005: ';' expected.
-typescript_standalone.d.ts(11003,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11003,52): error TS1005: ';' expected.
-typescript_standalone.d.ts(11023,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11023,44): error TS1005: ';' expected.
-typescript_standalone.d.ts(11033,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11033,35): error TS1005: ';' expected.
-typescript_standalone.d.ts(11067,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11067,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11070,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11070,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11074,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11074,45): error TS1005: ';' expected.
-typescript_standalone.d.ts(11092,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11092,56): error TS1005: ';' expected.
-typescript_standalone.d.ts(11118,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11118,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(11121,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11121,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11133,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11133,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11163,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11163,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11197,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11197,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11208,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11208,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11232,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11232,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11240,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11240,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11244,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11244,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11274,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11274,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11317,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11317,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(11504,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11504,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11506,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11506,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11510,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11510,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11512,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11512,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11514,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11514,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11516,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11516,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11518,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11518,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11527,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11527,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11529,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11529,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11531,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11531,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11533,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11533,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11535,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11535,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11537,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11537,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11539,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11539,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11541,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11541,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(8926,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(8926,42): error TS1005: ';' expected.
+typescript_standalone.d.ts(9186,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(9186,46): error TS1005: ';' expected.
+typescript_standalone.d.ts(9536,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(9536,36): error TS1005: ';' expected.
+typescript_standalone.d.ts(9560,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(9560,36): error TS1005: ';' expected.
+typescript_standalone.d.ts(9647,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(9647,38): error TS1005: ';' expected.
+typescript_standalone.d.ts(10812,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(10812,57): error TS1005: ';' expected.
+typescript_standalone.d.ts(10823,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(10823,41): error TS1005: ';' expected.
+typescript_standalone.d.ts(10833,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(10833,48): error TS1005: ';' expected.
+typescript_standalone.d.ts(10908,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(10908,47): error TS1005: ';' expected.
+typescript_standalone.d.ts(10965,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(10965,47): error TS1005: ';' expected.
+typescript_standalone.d.ts(11019,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11019,52): error TS1005: ';' expected.
+typescript_standalone.d.ts(11039,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11039,44): error TS1005: ';' expected.
+typescript_standalone.d.ts(11049,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11049,35): error TS1005: ';' expected.
+typescript_standalone.d.ts(11083,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11083,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11086,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11086,43): error TS1005: ';' expected.
+typescript_standalone.d.ts(11090,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11090,45): error TS1005: ';' expected.
+typescript_standalone.d.ts(11108,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11108,56): error TS1005: ';' expected.
+typescript_standalone.d.ts(11134,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11134,36): error TS1005: ';' expected.
+typescript_standalone.d.ts(11137,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11137,43): error TS1005: ';' expected.
+typescript_standalone.d.ts(11149,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11149,43): error TS1005: ';' expected.
+typescript_standalone.d.ts(11179,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11179,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11213,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11213,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11224,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11224,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11248,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11248,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11256,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11256,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11260,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11260,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11290,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11290,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11333,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11333,41): error TS1005: ';' expected.
+typescript_standalone.d.ts(11520,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11520,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11522,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11522,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11526,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11526,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11528,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11528,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11530,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11530,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11532,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11532,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11534,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11534,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11543,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11543,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11545,28): error TS1005: ';' expected.
@@ -100,6 +84,14 @@ typescript_standalone.d.ts(11553,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11553,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11555,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11555,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11557,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11557,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11559,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11559,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11561,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11561,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11563,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11563,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11565,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11565,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11567,28): error TS1005: ';' expected.
@@ -108,26 +100,34 @@ typescript_standalone.d.ts(11569,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11569,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11571,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11571,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11573,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11573,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11575,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11575,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11577,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11577,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11579,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11579,72): error TS1005: ';' expected.
 typescript_standalone.d.ts(11581,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11581,52): error TS1005: ';' expected.
-typescript_standalone.d.ts(11653,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11653,72): error TS1005: ';' expected.
-typescript_standalone.d.ts(11655,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11655,38): error TS1005: ';' expected.
-typescript_standalone.d.ts(11657,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11657,71): error TS1005: ';' expected.
-typescript_standalone.d.ts(11659,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11659,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11735,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11735,48): error TS1005: ';' expected.
+typescript_standalone.d.ts(11581,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11583,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11583,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11585,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11585,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11587,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11587,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11589,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11589,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11591,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11591,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11593,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11593,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11595,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11595,72): error TS1005: ';' expected.
+typescript_standalone.d.ts(11597,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11597,52): error TS1005: ';' expected.
+typescript_standalone.d.ts(11669,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11669,72): error TS1005: ';' expected.
+typescript_standalone.d.ts(11671,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11671,38): error TS1005: ';' expected.
+typescript_standalone.d.ts(11673,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11673,71): error TS1005: ';' expected.
+typescript_standalone.d.ts(11675,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11675,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11751,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11751,48): error TS1005: ';' expected.
 
 
 ==== tests/cases/compiler/APISample_transform.ts (0 errors) ====
diff --git a/tests/baselines/reference/APISample_watcher.errors.txt b/tests/baselines/reference/APISample_watcher.errors.txt
index 61fffd2cec854..44c5c342cff18 100644
--- a/tests/baselines/reference/APISample_watcher.errors.txt
+++ b/tests/baselines/reference/APISample_watcher.errors.txt
@@ -1,91 +1,75 @@
 typescript_standalone.d.ts(21,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(21,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(8910,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(8910,42): error TS1005: ';' expected.
-typescript_standalone.d.ts(9170,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9170,46): error TS1005: ';' expected.
-typescript_standalone.d.ts(9520,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9520,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(9544,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9544,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(9631,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9631,38): error TS1005: ';' expected.
-typescript_standalone.d.ts(10796,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10796,57): error TS1005: ';' expected.
-typescript_standalone.d.ts(10807,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10807,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(10817,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10817,48): error TS1005: ';' expected.
-typescript_standalone.d.ts(10892,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10892,47): error TS1005: ';' expected.
-typescript_standalone.d.ts(10949,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10949,47): error TS1005: ';' expected.
-typescript_standalone.d.ts(11003,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11003,52): error TS1005: ';' expected.
-typescript_standalone.d.ts(11023,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11023,44): error TS1005: ';' expected.
-typescript_standalone.d.ts(11033,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11033,35): error TS1005: ';' expected.
-typescript_standalone.d.ts(11067,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11067,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11070,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11070,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11074,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11074,45): error TS1005: ';' expected.
-typescript_standalone.d.ts(11092,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11092,56): error TS1005: ';' expected.
-typescript_standalone.d.ts(11118,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11118,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(11121,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11121,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11133,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11133,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11163,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11163,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11197,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11197,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11208,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11208,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11232,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11232,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11240,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11240,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11244,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11244,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11274,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11274,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11317,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11317,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(11504,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11504,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11506,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11506,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11510,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11510,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11512,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11512,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11514,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11514,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11516,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11516,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11518,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11518,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11527,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11527,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11529,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11529,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11531,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11531,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11533,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11533,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11535,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11535,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11537,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11537,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11539,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11539,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11541,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11541,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(8926,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(8926,42): error TS1005: ';' expected.
+typescript_standalone.d.ts(9186,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(9186,46): error TS1005: ';' expected.
+typescript_standalone.d.ts(9536,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(9536,36): error TS1005: ';' expected.
+typescript_standalone.d.ts(9560,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(9560,36): error TS1005: ';' expected.
+typescript_standalone.d.ts(9647,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(9647,38): error TS1005: ';' expected.
+typescript_standalone.d.ts(10812,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(10812,57): error TS1005: ';' expected.
+typescript_standalone.d.ts(10823,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(10823,41): error TS1005: ';' expected.
+typescript_standalone.d.ts(10833,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(10833,48): error TS1005: ';' expected.
+typescript_standalone.d.ts(10908,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(10908,47): error TS1005: ';' expected.
+typescript_standalone.d.ts(10965,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(10965,47): error TS1005: ';' expected.
+typescript_standalone.d.ts(11019,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11019,52): error TS1005: ';' expected.
+typescript_standalone.d.ts(11039,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11039,44): error TS1005: ';' expected.
+typescript_standalone.d.ts(11049,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11049,35): error TS1005: ';' expected.
+typescript_standalone.d.ts(11083,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11083,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11086,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11086,43): error TS1005: ';' expected.
+typescript_standalone.d.ts(11090,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11090,45): error TS1005: ';' expected.
+typescript_standalone.d.ts(11108,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11108,56): error TS1005: ';' expected.
+typescript_standalone.d.ts(11134,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11134,36): error TS1005: ';' expected.
+typescript_standalone.d.ts(11137,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11137,43): error TS1005: ';' expected.
+typescript_standalone.d.ts(11149,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11149,43): error TS1005: ';' expected.
+typescript_standalone.d.ts(11179,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11179,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11213,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11213,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11224,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11224,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11248,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11248,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11256,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11256,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11260,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11260,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11290,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11290,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11333,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11333,41): error TS1005: ';' expected.
+typescript_standalone.d.ts(11520,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11520,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11522,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11522,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11526,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11526,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11528,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11528,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11530,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11530,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11532,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11532,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11534,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11534,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11543,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11543,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11545,28): error TS1005: ';' expected.
@@ -100,6 +84,14 @@ typescript_standalone.d.ts(11553,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11553,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11555,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11555,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11557,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11557,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11559,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11559,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11561,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11561,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11563,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11563,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11565,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11565,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11567,28): error TS1005: ';' expected.
@@ -108,26 +100,34 @@ typescript_standalone.d.ts(11569,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11569,37): error TS1005: ';' expected.
 typescript_standalone.d.ts(11571,28): error TS1005: ';' expected.
 typescript_standalone.d.ts(11571,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11573,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11573,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11575,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11575,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11577,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11577,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11579,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11579,72): error TS1005: ';' expected.
 typescript_standalone.d.ts(11581,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11581,52): error TS1005: ';' expected.
-typescript_standalone.d.ts(11653,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11653,72): error TS1005: ';' expected.
-typescript_standalone.d.ts(11655,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11655,38): error TS1005: ';' expected.
-typescript_standalone.d.ts(11657,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11657,71): error TS1005: ';' expected.
-typescript_standalone.d.ts(11659,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11659,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11735,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11735,48): error TS1005: ';' expected.
+typescript_standalone.d.ts(11581,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11583,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11583,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11585,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11585,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11587,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11587,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11589,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11589,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11591,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11591,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11593,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11593,37): error TS1005: ';' expected.
+typescript_standalone.d.ts(11595,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11595,72): error TS1005: ';' expected.
+typescript_standalone.d.ts(11597,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11597,52): error TS1005: ';' expected.
+typescript_standalone.d.ts(11669,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11669,72): error TS1005: ';' expected.
+typescript_standalone.d.ts(11671,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11671,38): error TS1005: ';' expected.
+typescript_standalone.d.ts(11673,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11673,71): error TS1005: ';' expected.
+typescript_standalone.d.ts(11675,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11675,40): error TS1005: ';' expected.
+typescript_standalone.d.ts(11751,28): error TS1005: ';' expected.
+typescript_standalone.d.ts(11751,48): error TS1005: ';' expected.
 
 
 ==== tests/cases/compiler/APISample_watcher.ts (0 errors) ====
diff --git a/tests/baselines/reference/api/tsserverlibrary.d.ts b/tests/baselines/reference/api/tsserverlibrary.d.ts
index 8ccf4e49a92da..8e1a4f1aae68b 100644
--- a/tests/baselines/reference/api/tsserverlibrary.d.ts
+++ b/tests/baselines/reference/api/tsserverlibrary.d.ts
@@ -926,10 +926,10 @@ declare namespace ts {
         FirstBinaryOperator = 27,
         LastBinaryOperator = 70,
         FirstNode = 146,
-        FirstJSDocNode = 278,
-        LastJSDocNode = 298,
-        FirstJSDocTagNode = 289,
-        LastJSDocTagNode = 298,
+        FirstJSDocNode = 280,
+        LastJSDocNode = 300,
+        FirstJSDocTagNode = 291,
+        LastJSDocTagNode = 300,
         FirstContextualKeyword = 117,
         LastContextualKeyword = 145
     }
@@ -3083,11 +3083,12 @@ declare namespace ts {
         ContainsStatic = 512,
         Late = 1024,
         ReverseMapped = 2048,
+        OptionalParameter = 4096,
+        RestParameter = 8192,
         Synthetic = 6
     }
     interface TransientSymbol extends Symbol, SymbolLinks {
         checkFlags: CheckFlags;
-        isRestParameter?: boolean;
     }
     interface ReverseMappedSymbol extends TransientSymbol {
         propertyType: Type;
@@ -4906,7 +4907,6 @@ declare namespace ts {
         An_object_literal_cannot_have_property_and_accessor_with_the_same_name: DiagnosticMessage;
         An_export_assignment_cannot_have_modifiers: DiagnosticMessage;
         Octal_literals_are_not_allowed_in_strict_mode: DiagnosticMessage;
-        A_tuple_type_element_list_cannot_be_empty: DiagnosticMessage;
         Variable_declaration_list_cannot_be_empty: DiagnosticMessage;
         Digit_expected: DiagnosticMessage;
         Hexadecimal_digit_expected: DiagnosticMessage;
@@ -6372,7 +6372,7 @@ declare namespace ts {
     function getExpressionAssociativity(expression: Expression): Associativity;
     function getOperatorAssociativity(kind: SyntaxKind, operator: SyntaxKind, hasArguments?: boolean): Associativity;
     function getExpressionPrecedence(expression: Expression): number;
-    function getOperator(expression: Expression): SyntaxKind.Unknown | SyntaxKind.EndOfFileToken | SyntaxKind.SingleLineCommentTrivia | SyntaxKind.MultiLineCommentTrivia | SyntaxKind.NewLineTrivia | SyntaxKind.WhitespaceTrivia | SyntaxKind.ShebangTrivia | SyntaxKind.ConflictMarkerTrivia | SyntaxKind.NumericLiteral | SyntaxKind.StringLiteral | SyntaxKind.JsxText | SyntaxKind.JsxTextAllWhiteSpaces | SyntaxKind.RegularExpressionLiteral | SyntaxKind.NoSubstitutionTemplateLiteral | SyntaxKind.TemplateHead | SyntaxKind.TemplateMiddle | SyntaxKind.TemplateTail | SyntaxKind.OpenBraceToken | SyntaxKind.CloseBraceToken | SyntaxKind.OpenParenToken | SyntaxKind.CloseParenToken | SyntaxKind.OpenBracketToken | SyntaxKind.CloseBracketToken | SyntaxKind.DotToken | SyntaxKind.DotDotDotToken | SyntaxKind.SemicolonToken | SyntaxKind.CommaToken | SyntaxKind.LessThanToken | SyntaxKind.LessThanSlashToken | SyntaxKind.GreaterThanToken | SyntaxKind.LessThanEqualsToken | SyntaxKind.GreaterThanEqualsToken | SyntaxKind.EqualsEqualsToken | SyntaxKind.ExclamationEqualsToken | SyntaxKind.EqualsEqualsEqualsToken | SyntaxKind.ExclamationEqualsEqualsToken | SyntaxKind.EqualsGreaterThanToken | SyntaxKind.PlusToken | SyntaxKind.MinusToken | SyntaxKind.AsteriskToken | SyntaxKind.AsteriskAsteriskToken | SyntaxKind.SlashToken | SyntaxKind.PercentToken | SyntaxKind.PlusPlusToken | SyntaxKind.MinusMinusToken | SyntaxKind.LessThanLessThanToken | SyntaxKind.GreaterThanGreaterThanToken | SyntaxKind.GreaterThanGreaterThanGreaterThanToken | SyntaxKind.AmpersandToken | SyntaxKind.BarToken | SyntaxKind.CaretToken | SyntaxKind.ExclamationToken | SyntaxKind.TildeToken | SyntaxKind.AmpersandAmpersandToken | SyntaxKind.BarBarToken | SyntaxKind.QuestionToken | SyntaxKind.ColonToken | SyntaxKind.AtToken | SyntaxKind.EqualsToken | SyntaxKind.PlusEqualsToken | SyntaxKind.MinusEqualsToken | SyntaxKind.AsteriskEqualsToken | SyntaxKind.AsteriskAsteriskEqualsToken | SyntaxKind.SlashEqualsToken | SyntaxKind.PercentEqualsToken | SyntaxKind.LessThanLessThanEqualsToken | SyntaxKind.GreaterThanGreaterThanEqualsToken | SyntaxKind.GreaterThanGreaterThanGreaterThanEqualsToken | SyntaxKind.AmpersandEqualsToken | SyntaxKind.BarEqualsToken | SyntaxKind.CaretEqualsToken | SyntaxKind.Identifier | SyntaxKind.BreakKeyword | SyntaxKind.CaseKeyword | SyntaxKind.CatchKeyword | SyntaxKind.ClassKeyword | SyntaxKind.ConstKeyword | SyntaxKind.ContinueKeyword | SyntaxKind.DebuggerKeyword | SyntaxKind.DefaultKeyword | SyntaxKind.DeleteKeyword | SyntaxKind.DoKeyword | SyntaxKind.ElseKeyword | SyntaxKind.EnumKeyword | SyntaxKind.ExportKeyword | SyntaxKind.ExtendsKeyword | SyntaxKind.FalseKeyword | SyntaxKind.FinallyKeyword | SyntaxKind.ForKeyword | SyntaxKind.FunctionKeyword | SyntaxKind.IfKeyword | SyntaxKind.ImportKeyword | SyntaxKind.InKeyword | SyntaxKind.InstanceOfKeyword | SyntaxKind.NewKeyword | SyntaxKind.NullKeyword | SyntaxKind.ReturnKeyword | SyntaxKind.SuperKeyword | SyntaxKind.SwitchKeyword | SyntaxKind.ThisKeyword | SyntaxKind.ThrowKeyword | SyntaxKind.TrueKeyword | SyntaxKind.TryKeyword | SyntaxKind.TypeOfKeyword | SyntaxKind.VarKeyword | SyntaxKind.VoidKeyword | SyntaxKind.WhileKeyword | SyntaxKind.WithKeyword | SyntaxKind.ImplementsKeyword | SyntaxKind.InterfaceKeyword | SyntaxKind.LetKeyword | SyntaxKind.PackageKeyword | SyntaxKind.PrivateKeyword | SyntaxKind.ProtectedKeyword | SyntaxKind.PublicKeyword | SyntaxKind.StaticKeyword | SyntaxKind.YieldKeyword | SyntaxKind.AbstractKeyword | SyntaxKind.AsKeyword | SyntaxKind.AnyKeyword | SyntaxKind.AsyncKeyword | SyntaxKind.AwaitKeyword | SyntaxKind.BooleanKeyword | SyntaxKind.ConstructorKeyword | SyntaxKind.DeclareKeyword | SyntaxKind.GetKeyword | SyntaxKind.InferKeyword | SyntaxKind.IsKeyword | SyntaxKind.KeyOfKeyword | SyntaxKind.ModuleKeyword | SyntaxKind.NamespaceKeyword | SyntaxKind.NeverKeyword | SyntaxKind.ReadonlyKeyword | SyntaxKind.RequireKeyword | SyntaxKind.NumberKeyword | SyntaxKind.ObjectKeyword | SyntaxKind.SetKeyword | SyntaxKind.StringKeyword | SyntaxKind.SymbolKeyword | SyntaxKind.TypeKeyword | SyntaxKind.UndefinedKeyword | SyntaxKind.UniqueKeyword | SyntaxKind.UnknownKeyword | SyntaxKind.FromKeyword | SyntaxKind.GlobalKeyword | SyntaxKind.OfKeyword | SyntaxKind.QualifiedName | SyntaxKind.ComputedPropertyName | SyntaxKind.TypeParameter | SyntaxKind.Parameter | SyntaxKind.Decorator | SyntaxKind.PropertySignature | SyntaxKind.PropertyDeclaration | SyntaxKind.MethodSignature | SyntaxKind.MethodDeclaration | SyntaxKind.Constructor | SyntaxKind.GetAccessor | SyntaxKind.SetAccessor | SyntaxKind.CallSignature | SyntaxKind.ConstructSignature | SyntaxKind.IndexSignature | SyntaxKind.TypePredicate | SyntaxKind.TypeReference | SyntaxKind.FunctionType | SyntaxKind.ConstructorType | SyntaxKind.TypeQuery | SyntaxKind.TypeLiteral | SyntaxKind.ArrayType | SyntaxKind.TupleType | SyntaxKind.UnionType | SyntaxKind.IntersectionType | SyntaxKind.ConditionalType | SyntaxKind.InferType | SyntaxKind.ParenthesizedType | SyntaxKind.ThisType | SyntaxKind.TypeOperator | SyntaxKind.IndexedAccessType | SyntaxKind.MappedType | SyntaxKind.LiteralType | SyntaxKind.ImportType | SyntaxKind.ObjectBindingPattern | SyntaxKind.ArrayBindingPattern | SyntaxKind.BindingElement | SyntaxKind.ArrayLiteralExpression | SyntaxKind.ObjectLiteralExpression | SyntaxKind.PropertyAccessExpression | SyntaxKind.ElementAccessExpression | SyntaxKind.CallExpression | SyntaxKind.NewExpression | SyntaxKind.TaggedTemplateExpression | SyntaxKind.TypeAssertionExpression | SyntaxKind.ParenthesizedExpression | SyntaxKind.FunctionExpression | SyntaxKind.ArrowFunction | SyntaxKind.DeleteExpression | SyntaxKind.TypeOfExpression | SyntaxKind.VoidExpression | SyntaxKind.AwaitExpression | SyntaxKind.ConditionalExpression | SyntaxKind.TemplateExpression | SyntaxKind.YieldExpression | SyntaxKind.SpreadElement | SyntaxKind.ClassExpression | SyntaxKind.OmittedExpression | SyntaxKind.ExpressionWithTypeArguments | SyntaxKind.AsExpression | SyntaxKind.NonNullExpression | SyntaxKind.MetaProperty | SyntaxKind.TemplateSpan | SyntaxKind.SemicolonClassElement | SyntaxKind.Block | SyntaxKind.VariableStatement | SyntaxKind.EmptyStatement | SyntaxKind.ExpressionStatement | SyntaxKind.IfStatement | SyntaxKind.DoStatement | SyntaxKind.WhileStatement | SyntaxKind.ForStatement | SyntaxKind.ForInStatement | SyntaxKind.ForOfStatement | SyntaxKind.ContinueStatement | SyntaxKind.BreakStatement | SyntaxKind.ReturnStatement | SyntaxKind.WithStatement | SyntaxKind.SwitchStatement | SyntaxKind.LabeledStatement | SyntaxKind.ThrowStatement | SyntaxKind.TryStatement | SyntaxKind.DebuggerStatement | SyntaxKind.VariableDeclaration | SyntaxKind.VariableDeclarationList | SyntaxKind.FunctionDeclaration | SyntaxKind.ClassDeclaration | SyntaxKind.InterfaceDeclaration | SyntaxKind.TypeAliasDeclaration | SyntaxKind.EnumDeclaration | SyntaxKind.ModuleDeclaration | SyntaxKind.ModuleBlock | SyntaxKind.CaseBlock | SyntaxKind.NamespaceExportDeclaration | SyntaxKind.ImportEqualsDeclaration | SyntaxKind.ImportDeclaration | SyntaxKind.ImportClause | SyntaxKind.NamespaceImport | SyntaxKind.NamedImports | SyntaxKind.ImportSpecifier | SyntaxKind.ExportAssignment | SyntaxKind.ExportDeclaration | SyntaxKind.NamedExports | SyntaxKind.ExportSpecifier | SyntaxKind.MissingDeclaration | SyntaxKind.ExternalModuleReference | SyntaxKind.JsxElement | SyntaxKind.JsxSelfClosingElement | SyntaxKind.JsxOpeningElement | SyntaxKind.JsxClosingElement | SyntaxKind.JsxFragment | SyntaxKind.JsxOpeningFragment | SyntaxKind.JsxClosingFragment | SyntaxKind.JsxAttribute | SyntaxKind.JsxAttributes | SyntaxKind.JsxSpreadAttribute | SyntaxKind.JsxExpression | SyntaxKind.CaseClause | SyntaxKind.DefaultClause | SyntaxKind.HeritageClause | SyntaxKind.CatchClause | SyntaxKind.PropertyAssignment | SyntaxKind.ShorthandPropertyAssignment | SyntaxKind.SpreadAssignment | SyntaxKind.EnumMember | SyntaxKind.SourceFile | SyntaxKind.Bundle | SyntaxKind.UnparsedSource | SyntaxKind.InputFiles | SyntaxKind.JSDocTypeExpression | SyntaxKind.JSDocAllType | SyntaxKind.JSDocUnknownType | SyntaxKind.JSDocNullableType | SyntaxKind.JSDocNonNullableType | SyntaxKind.JSDocOptionalType | SyntaxKind.JSDocFunctionType | SyntaxKind.JSDocVariadicType | SyntaxKind.JSDocComment | SyntaxKind.JSDocTypeLiteral | SyntaxKind.JSDocSignature | SyntaxKind.JSDocTag | SyntaxKind.JSDocAugmentsTag | SyntaxKind.JSDocClassTag | SyntaxKind.JSDocCallbackTag | SyntaxKind.JSDocParameterTag | SyntaxKind.JSDocReturnTag | SyntaxKind.JSDocTypeTag | SyntaxKind.JSDocTemplateTag | SyntaxKind.JSDocTypedefTag | SyntaxKind.JSDocPropertyTag | SyntaxKind.SyntaxList | SyntaxKind.NotEmittedStatement | SyntaxKind.PartiallyEmittedExpression | SyntaxKind.CommaListExpression | SyntaxKind.MergeDeclarationMarker | SyntaxKind.EndOfDeclarationMarker | SyntaxKind.Count;
+    function getOperator(expression: Expression): SyntaxKind.Unknown | SyntaxKind.EndOfFileToken | SyntaxKind.SingleLineCommentTrivia | SyntaxKind.MultiLineCommentTrivia | SyntaxKind.NewLineTrivia | SyntaxKind.WhitespaceTrivia | SyntaxKind.ShebangTrivia | SyntaxKind.ConflictMarkerTrivia | SyntaxKind.NumericLiteral | SyntaxKind.StringLiteral | SyntaxKind.JsxText | SyntaxKind.JsxTextAllWhiteSpaces | SyntaxKind.RegularExpressionLiteral | SyntaxKind.NoSubstitutionTemplateLiteral | SyntaxKind.TemplateHead | SyntaxKind.TemplateMiddle | SyntaxKind.TemplateTail | SyntaxKind.OpenBraceToken | SyntaxKind.CloseBraceToken | SyntaxKind.OpenParenToken | SyntaxKind.CloseParenToken | SyntaxKind.OpenBracketToken | SyntaxKind.CloseBracketToken | SyntaxKind.DotToken | SyntaxKind.DotDotDotToken | SyntaxKind.SemicolonToken | SyntaxKind.CommaToken | SyntaxKind.LessThanToken | SyntaxKind.LessThanSlashToken | SyntaxKind.GreaterThanToken | SyntaxKind.LessThanEqualsToken | SyntaxKind.GreaterThanEqualsToken | SyntaxKind.EqualsEqualsToken | SyntaxKind.ExclamationEqualsToken | SyntaxKind.EqualsEqualsEqualsToken | SyntaxKind.ExclamationEqualsEqualsToken | SyntaxKind.EqualsGreaterThanToken | SyntaxKind.PlusToken | SyntaxKind.MinusToken | SyntaxKind.AsteriskToken | SyntaxKind.AsteriskAsteriskToken | SyntaxKind.SlashToken | SyntaxKind.PercentToken | SyntaxKind.PlusPlusToken | SyntaxKind.MinusMinusToken | SyntaxKind.LessThanLessThanToken | SyntaxKind.GreaterThanGreaterThanToken | SyntaxKind.GreaterThanGreaterThanGreaterThanToken | SyntaxKind.AmpersandToken | SyntaxKind.BarToken | SyntaxKind.CaretToken | SyntaxKind.ExclamationToken | SyntaxKind.TildeToken | SyntaxKind.AmpersandAmpersandToken | SyntaxKind.BarBarToken | SyntaxKind.QuestionToken | SyntaxKind.ColonToken | SyntaxKind.AtToken | SyntaxKind.EqualsToken | SyntaxKind.PlusEqualsToken | SyntaxKind.MinusEqualsToken | SyntaxKind.AsteriskEqualsToken | SyntaxKind.AsteriskAsteriskEqualsToken | SyntaxKind.SlashEqualsToken | SyntaxKind.PercentEqualsToken | SyntaxKind.LessThanLessThanEqualsToken | SyntaxKind.GreaterThanGreaterThanEqualsToken | SyntaxKind.GreaterThanGreaterThanGreaterThanEqualsToken | SyntaxKind.AmpersandEqualsToken | SyntaxKind.BarEqualsToken | SyntaxKind.CaretEqualsToken | SyntaxKind.Identifier | SyntaxKind.BreakKeyword | SyntaxKind.CaseKeyword | SyntaxKind.CatchKeyword | SyntaxKind.ClassKeyword | SyntaxKind.ConstKeyword | SyntaxKind.ContinueKeyword | SyntaxKind.DebuggerKeyword | SyntaxKind.DefaultKeyword | SyntaxKind.DeleteKeyword | SyntaxKind.DoKeyword | SyntaxKind.ElseKeyword | SyntaxKind.EnumKeyword | SyntaxKind.ExportKeyword | SyntaxKind.ExtendsKeyword | SyntaxKind.FalseKeyword | SyntaxKind.FinallyKeyword | SyntaxKind.ForKeyword | SyntaxKind.FunctionKeyword | SyntaxKind.IfKeyword | SyntaxKind.ImportKeyword | SyntaxKind.InKeyword | SyntaxKind.InstanceOfKeyword | SyntaxKind.NewKeyword | SyntaxKind.NullKeyword | SyntaxKind.ReturnKeyword | SyntaxKind.SuperKeyword | SyntaxKind.SwitchKeyword | SyntaxKind.ThisKeyword | SyntaxKind.ThrowKeyword | SyntaxKind.TrueKeyword | SyntaxKind.TryKeyword | SyntaxKind.TypeOfKeyword | SyntaxKind.VarKeyword | SyntaxKind.VoidKeyword | SyntaxKind.WhileKeyword | SyntaxKind.WithKeyword | SyntaxKind.ImplementsKeyword | SyntaxKind.InterfaceKeyword | SyntaxKind.LetKeyword | SyntaxKind.PackageKeyword | SyntaxKind.PrivateKeyword | SyntaxKind.ProtectedKeyword | SyntaxKind.PublicKeyword | SyntaxKind.StaticKeyword | SyntaxKind.YieldKeyword | SyntaxKind.AbstractKeyword | SyntaxKind.AsKeyword | SyntaxKind.AnyKeyword | SyntaxKind.AsyncKeyword | SyntaxKind.AwaitKeyword | SyntaxKind.BooleanKeyword | SyntaxKind.ConstructorKeyword | SyntaxKind.DeclareKeyword | SyntaxKind.GetKeyword | SyntaxKind.InferKeyword | SyntaxKind.IsKeyword | SyntaxKind.KeyOfKeyword | SyntaxKind.ModuleKeyword | SyntaxKind.NamespaceKeyword | SyntaxKind.NeverKeyword | SyntaxKind.ReadonlyKeyword | SyntaxKind.RequireKeyword | SyntaxKind.NumberKeyword | SyntaxKind.ObjectKeyword | SyntaxKind.SetKeyword | SyntaxKind.StringKeyword | SyntaxKind.SymbolKeyword | SyntaxKind.TypeKeyword | SyntaxKind.UndefinedKeyword | SyntaxKind.UniqueKeyword | SyntaxKind.UnknownKeyword | SyntaxKind.FromKeyword | SyntaxKind.GlobalKeyword | SyntaxKind.OfKeyword | SyntaxKind.QualifiedName | SyntaxKind.ComputedPropertyName | SyntaxKind.TypeParameter | SyntaxKind.Parameter | SyntaxKind.Decorator | SyntaxKind.PropertySignature | SyntaxKind.PropertyDeclaration | SyntaxKind.MethodSignature | SyntaxKind.MethodDeclaration | SyntaxKind.Constructor | SyntaxKind.GetAccessor | SyntaxKind.SetAccessor | SyntaxKind.CallSignature | SyntaxKind.ConstructSignature | SyntaxKind.IndexSignature | SyntaxKind.TypePredicate | SyntaxKind.TypeReference | SyntaxKind.FunctionType | SyntaxKind.ConstructorType | SyntaxKind.TypeQuery | SyntaxKind.TypeLiteral | SyntaxKind.ArrayType | SyntaxKind.TupleType | SyntaxKind.OptionalType | SyntaxKind.UnionType | SyntaxKind.IntersectionType | SyntaxKind.ConditionalType | SyntaxKind.InferType | SyntaxKind.ParenthesizedType | SyntaxKind.ThisType | SyntaxKind.TypeOperator | SyntaxKind.IndexedAccessType | SyntaxKind.MappedType | SyntaxKind.LiteralType | SyntaxKind.ImportType | SyntaxKind.ObjectBindingPattern | SyntaxKind.ArrayBindingPattern | SyntaxKind.BindingElement | SyntaxKind.ArrayLiteralExpression | SyntaxKind.ObjectLiteralExpression | SyntaxKind.PropertyAccessExpression | SyntaxKind.ElementAccessExpression | SyntaxKind.CallExpression | SyntaxKind.NewExpression | SyntaxKind.TaggedTemplateExpression | SyntaxKind.TypeAssertionExpression | SyntaxKind.ParenthesizedExpression | SyntaxKind.FunctionExpression | SyntaxKind.ArrowFunction | SyntaxKind.DeleteExpression | SyntaxKind.TypeOfExpression | SyntaxKind.VoidExpression | SyntaxKind.AwaitExpression | SyntaxKind.ConditionalExpression | SyntaxKind.TemplateExpression | SyntaxKind.YieldExpression | SyntaxKind.SpreadElement | SyntaxKind.ClassExpression | SyntaxKind.OmittedExpression | SyntaxKind.ExpressionWithTypeArguments | SyntaxKind.AsExpression | SyntaxKind.NonNullExpression | SyntaxKind.MetaProperty | SyntaxKind.SyntheticExpression | SyntaxKind.TemplateSpan | SyntaxKind.SemicolonClassElement | SyntaxKind.Block | SyntaxKind.VariableStatement | SyntaxKind.EmptyStatement | SyntaxKind.ExpressionStatement | SyntaxKind.IfStatement | SyntaxKind.DoStatement | SyntaxKind.WhileStatement | SyntaxKind.ForStatement | SyntaxKind.ForInStatement | SyntaxKind.ForOfStatement | SyntaxKind.ContinueStatement | SyntaxKind.BreakStatement | SyntaxKind.ReturnStatement | SyntaxKind.WithStatement | SyntaxKind.SwitchStatement | SyntaxKind.LabeledStatement | SyntaxKind.ThrowStatement | SyntaxKind.TryStatement | SyntaxKind.DebuggerStatement | SyntaxKind.VariableDeclaration | SyntaxKind.VariableDeclarationList | SyntaxKind.FunctionDeclaration | SyntaxKind.ClassDeclaration | SyntaxKind.InterfaceDeclaration | SyntaxKind.TypeAliasDeclaration | SyntaxKind.EnumDeclaration | SyntaxKind.ModuleDeclaration | SyntaxKind.ModuleBlock | SyntaxKind.CaseBlock | SyntaxKind.NamespaceExportDeclaration | SyntaxKind.ImportEqualsDeclaration | SyntaxKind.ImportDeclaration | SyntaxKind.ImportClause | SyntaxKind.NamespaceImport | SyntaxKind.NamedImports | SyntaxKind.ImportSpecifier | SyntaxKind.ExportAssignment | SyntaxKind.ExportDeclaration | SyntaxKind.NamedExports | SyntaxKind.ExportSpecifier | SyntaxKind.MissingDeclaration | SyntaxKind.ExternalModuleReference | SyntaxKind.JsxElement | SyntaxKind.JsxSelfClosingElement | SyntaxKind.JsxOpeningElement | SyntaxKind.JsxClosingElement | SyntaxKind.JsxFragment | SyntaxKind.JsxOpeningFragment | SyntaxKind.JsxClosingFragment | SyntaxKind.JsxAttribute | SyntaxKind.JsxAttributes | SyntaxKind.JsxSpreadAttribute | SyntaxKind.JsxExpression | SyntaxKind.CaseClause | SyntaxKind.DefaultClause | SyntaxKind.HeritageClause | SyntaxKind.CatchClause | SyntaxKind.PropertyAssignment | SyntaxKind.ShorthandPropertyAssignment | SyntaxKind.SpreadAssignment | SyntaxKind.EnumMember | SyntaxKind.SourceFile | SyntaxKind.Bundle | SyntaxKind.UnparsedSource | SyntaxKind.InputFiles | SyntaxKind.JSDocTypeExpression | SyntaxKind.JSDocAllType | SyntaxKind.JSDocUnknownType | SyntaxKind.JSDocNullableType | SyntaxKind.JSDocNonNullableType | SyntaxKind.JSDocOptionalType | SyntaxKind.JSDocFunctionType | SyntaxKind.JSDocVariadicType | SyntaxKind.JSDocComment | SyntaxKind.JSDocTypeLiteral | SyntaxKind.JSDocSignature | SyntaxKind.JSDocTag | SyntaxKind.JSDocAugmentsTag | SyntaxKind.JSDocClassTag | SyntaxKind.JSDocCallbackTag | SyntaxKind.JSDocParameterTag | SyntaxKind.JSDocReturnTag | SyntaxKind.JSDocTypeTag | SyntaxKind.JSDocTemplateTag | SyntaxKind.JSDocTypedefTag | SyntaxKind.JSDocPropertyTag | SyntaxKind.SyntaxList | SyntaxKind.NotEmittedStatement | SyntaxKind.PartiallyEmittedExpression | SyntaxKind.CommaListExpression | SyntaxKind.MergeDeclarationMarker | SyntaxKind.EndOfDeclarationMarker | SyntaxKind.Count;
     function getOperatorPrecedence(nodeKind: SyntaxKind, operatorKind: SyntaxKind, hasArguments?: boolean): number;
     function getBinaryOperatorPrecedence(kind: SyntaxKind): number;
     function createDiagnosticCollection(): DiagnosticCollection;
diff --git a/tests/baselines/reference/api/typescript.d.ts b/tests/baselines/reference/api/typescript.d.ts
index eecff73699d40..ce0091395a024 100644
--- a/tests/baselines/reference/api/typescript.d.ts
+++ b/tests/baselines/reference/api/typescript.d.ts
@@ -926,10 +926,10 @@ declare namespace ts {
         FirstBinaryOperator = 27,
         LastBinaryOperator = 70,
         FirstNode = 146,
-        FirstJSDocNode = 278,
-        LastJSDocNode = 298,
-        FirstJSDocTagNode = 289,
-        LastJSDocTagNode = 298,
+        FirstJSDocNode = 280,
+        LastJSDocNode = 300,
+        FirstJSDocTagNode = 291,
+        LastJSDocTagNode = 300,
         FirstContextualKeyword = 117,
         LastContextualKeyword = 145
     }
@@ -3083,11 +3083,12 @@ declare namespace ts {
         ContainsStatic = 512,
         Late = 1024,
         ReverseMapped = 2048,
+        OptionalParameter = 4096,
+        RestParameter = 8192,
         Synthetic = 6
     }
     interface TransientSymbol extends Symbol, SymbolLinks {
         checkFlags: CheckFlags;
-        isRestParameter?: boolean;
     }
     interface ReverseMappedSymbol extends TransientSymbol {
         propertyType: Type;
@@ -4906,7 +4907,6 @@ declare namespace ts {
         An_object_literal_cannot_have_property_and_accessor_with_the_same_name: DiagnosticMessage;
         An_export_assignment_cannot_have_modifiers: DiagnosticMessage;
         Octal_literals_are_not_allowed_in_strict_mode: DiagnosticMessage;
-        A_tuple_type_element_list_cannot_be_empty: DiagnosticMessage;
         Variable_declaration_list_cannot_be_empty: DiagnosticMessage;
         Digit_expected: DiagnosticMessage;
         Hexadecimal_digit_expected: DiagnosticMessage;
@@ -6372,7 +6372,7 @@ declare namespace ts {
     function getExpressionAssociativity(expression: Expression): Associativity;
     function getOperatorAssociativity(kind: SyntaxKind, operator: SyntaxKind, hasArguments?: boolean): Associativity;
     function getExpressionPrecedence(expression: Expression): number;
-    function getOperator(expression: Expression): SyntaxKind.Unknown | SyntaxKind.EndOfFileToken | SyntaxKind.SingleLineCommentTrivia | SyntaxKind.MultiLineCommentTrivia | SyntaxKind.NewLineTrivia | SyntaxKind.WhitespaceTrivia | SyntaxKind.ShebangTrivia | SyntaxKind.ConflictMarkerTrivia | SyntaxKind.NumericLiteral | SyntaxKind.StringLiteral | SyntaxKind.JsxText | SyntaxKind.JsxTextAllWhiteSpaces | SyntaxKind.RegularExpressionLiteral | SyntaxKind.NoSubstitutionTemplateLiteral | SyntaxKind.TemplateHead | SyntaxKind.TemplateMiddle | SyntaxKind.TemplateTail | SyntaxKind.OpenBraceToken | SyntaxKind.CloseBraceToken | SyntaxKind.OpenParenToken | SyntaxKind.CloseParenToken | SyntaxKind.OpenBracketToken | SyntaxKind.CloseBracketToken | SyntaxKind.DotToken | SyntaxKind.DotDotDotToken | SyntaxKind.SemicolonToken | SyntaxKind.CommaToken | SyntaxKind.LessThanToken | SyntaxKind.LessThanSlashToken | SyntaxKind.GreaterThanToken | SyntaxKind.LessThanEqualsToken | SyntaxKind.GreaterThanEqualsToken | SyntaxKind.EqualsEqualsToken | SyntaxKind.ExclamationEqualsToken | SyntaxKind.EqualsEqualsEqualsToken | SyntaxKind.ExclamationEqualsEqualsToken | SyntaxKind.EqualsGreaterThanToken | SyntaxKind.PlusToken | SyntaxKind.MinusToken | SyntaxKind.AsteriskToken | SyntaxKind.AsteriskAsteriskToken | SyntaxKind.SlashToken | SyntaxKind.PercentToken | SyntaxKind.PlusPlusToken | SyntaxKind.MinusMinusToken | SyntaxKind.LessThanLessThanToken | SyntaxKind.GreaterThanGreaterThanToken | SyntaxKind.GreaterThanGreaterThanGreaterThanToken | SyntaxKind.AmpersandToken | SyntaxKind.BarToken | SyntaxKind.CaretToken | SyntaxKind.ExclamationToken | SyntaxKind.TildeToken | SyntaxKind.AmpersandAmpersandToken | SyntaxKind.BarBarToken | SyntaxKind.QuestionToken | SyntaxKind.ColonToken | SyntaxKind.AtToken | SyntaxKind.EqualsToken | SyntaxKind.PlusEqualsToken | SyntaxKind.MinusEqualsToken | SyntaxKind.AsteriskEqualsToken | SyntaxKind.AsteriskAsteriskEqualsToken | SyntaxKind.SlashEqualsToken | SyntaxKind.PercentEqualsToken | SyntaxKind.LessThanLessThanEqualsToken | SyntaxKind.GreaterThanGreaterThanEqualsToken | SyntaxKind.GreaterThanGreaterThanGreaterThanEqualsToken | SyntaxKind.AmpersandEqualsToken | SyntaxKind.BarEqualsToken | SyntaxKind.CaretEqualsToken | SyntaxKind.Identifier | SyntaxKind.BreakKeyword | SyntaxKind.CaseKeyword | SyntaxKind.CatchKeyword | SyntaxKind.ClassKeyword | SyntaxKind.ConstKeyword | SyntaxKind.ContinueKeyword | SyntaxKind.DebuggerKeyword | SyntaxKind.DefaultKeyword | SyntaxKind.DeleteKeyword | SyntaxKind.DoKeyword | SyntaxKind.ElseKeyword | SyntaxKind.EnumKeyword | SyntaxKind.ExportKeyword | SyntaxKind.ExtendsKeyword | SyntaxKind.FalseKeyword | SyntaxKind.FinallyKeyword | SyntaxKind.ForKeyword | SyntaxKind.FunctionKeyword | SyntaxKind.IfKeyword | SyntaxKind.ImportKeyword | SyntaxKind.InKeyword | SyntaxKind.InstanceOfKeyword | SyntaxKind.NewKeyword | SyntaxKind.NullKeyword | SyntaxKind.ReturnKeyword | SyntaxKind.SuperKeyword | SyntaxKind.SwitchKeyword | SyntaxKind.ThisKeyword | SyntaxKind.ThrowKeyword | SyntaxKind.TrueKeyword | SyntaxKind.TryKeyword | SyntaxKind.TypeOfKeyword | SyntaxKind.VarKeyword | SyntaxKind.VoidKeyword | SyntaxKind.WhileKeyword | SyntaxKind.WithKeyword | SyntaxKind.ImplementsKeyword | SyntaxKind.InterfaceKeyword | SyntaxKind.LetKeyword | SyntaxKind.PackageKeyword | SyntaxKind.PrivateKeyword | SyntaxKind.ProtectedKeyword | SyntaxKind.PublicKeyword | SyntaxKind.StaticKeyword | SyntaxKind.YieldKeyword | SyntaxKind.AbstractKeyword | SyntaxKind.AsKeyword | SyntaxKind.AnyKeyword | SyntaxKind.AsyncKeyword | SyntaxKind.AwaitKeyword | SyntaxKind.BooleanKeyword | SyntaxKind.ConstructorKeyword | SyntaxKind.DeclareKeyword | SyntaxKind.GetKeyword | SyntaxKind.InferKeyword | SyntaxKind.IsKeyword | SyntaxKind.KeyOfKeyword | SyntaxKind.ModuleKeyword | SyntaxKind.NamespaceKeyword | SyntaxKind.NeverKeyword | SyntaxKind.ReadonlyKeyword | SyntaxKind.RequireKeyword | SyntaxKind.NumberKeyword | SyntaxKind.ObjectKeyword | SyntaxKind.SetKeyword | SyntaxKind.StringKeyword | SyntaxKind.SymbolKeyword | SyntaxKind.TypeKeyword | SyntaxKind.UndefinedKeyword | SyntaxKind.UniqueKeyword | SyntaxKind.UnknownKeyword | SyntaxKind.FromKeyword | SyntaxKind.GlobalKeyword | SyntaxKind.OfKeyword | SyntaxKind.QualifiedName | SyntaxKind.ComputedPropertyName | SyntaxKind.TypeParameter | SyntaxKind.Parameter | SyntaxKind.Decorator | SyntaxKind.PropertySignature | SyntaxKind.PropertyDeclaration | SyntaxKind.MethodSignature | SyntaxKind.MethodDeclaration | SyntaxKind.Constructor | SyntaxKind.GetAccessor | SyntaxKind.SetAccessor | SyntaxKind.CallSignature | SyntaxKind.ConstructSignature | SyntaxKind.IndexSignature | SyntaxKind.TypePredicate | SyntaxKind.TypeReference | SyntaxKind.FunctionType | SyntaxKind.ConstructorType | SyntaxKind.TypeQuery | SyntaxKind.TypeLiteral | SyntaxKind.ArrayType | SyntaxKind.TupleType | SyntaxKind.UnionType | SyntaxKind.IntersectionType | SyntaxKind.ConditionalType | SyntaxKind.InferType | SyntaxKind.ParenthesizedType | SyntaxKind.ThisType | SyntaxKind.TypeOperator | SyntaxKind.IndexedAccessType | SyntaxKind.MappedType | SyntaxKind.LiteralType | SyntaxKind.ImportType | SyntaxKind.ObjectBindingPattern | SyntaxKind.ArrayBindingPattern | SyntaxKind.BindingElement | SyntaxKind.ArrayLiteralExpression | SyntaxKind.ObjectLiteralExpression | SyntaxKind.PropertyAccessExpression | SyntaxKind.ElementAccessExpression | SyntaxKind.CallExpression | SyntaxKind.NewExpression | SyntaxKind.TaggedTemplateExpression | SyntaxKind.TypeAssertionExpression | SyntaxKind.ParenthesizedExpression | SyntaxKind.FunctionExpression | SyntaxKind.ArrowFunction | SyntaxKind.DeleteExpression | SyntaxKind.TypeOfExpression | SyntaxKind.VoidExpression | SyntaxKind.AwaitExpression | SyntaxKind.ConditionalExpression | SyntaxKind.TemplateExpression | SyntaxKind.YieldExpression | SyntaxKind.SpreadElement | SyntaxKind.ClassExpression | SyntaxKind.OmittedExpression | SyntaxKind.ExpressionWithTypeArguments | SyntaxKind.AsExpression | SyntaxKind.NonNullExpression | SyntaxKind.MetaProperty | SyntaxKind.TemplateSpan | SyntaxKind.SemicolonClassElement | SyntaxKind.Block | SyntaxKind.VariableStatement | SyntaxKind.EmptyStatement | SyntaxKind.ExpressionStatement | SyntaxKind.IfStatement | SyntaxKind.DoStatement | SyntaxKind.WhileStatement | SyntaxKind.ForStatement | SyntaxKind.ForInStatement | SyntaxKind.ForOfStatement | SyntaxKind.ContinueStatement | SyntaxKind.BreakStatement | SyntaxKind.ReturnStatement | SyntaxKind.WithStatement | SyntaxKind.SwitchStatement | SyntaxKind.LabeledStatement | SyntaxKind.ThrowStatement | SyntaxKind.TryStatement | SyntaxKind.DebuggerStatement | SyntaxKind.VariableDeclaration | SyntaxKind.VariableDeclarationList | SyntaxKind.FunctionDeclaration | SyntaxKind.ClassDeclaration | SyntaxKind.InterfaceDeclaration | SyntaxKind.TypeAliasDeclaration | SyntaxKind.EnumDeclaration | SyntaxKind.ModuleDeclaration | SyntaxKind.ModuleBlock | SyntaxKind.CaseBlock | SyntaxKind.NamespaceExportDeclaration | SyntaxKind.ImportEqualsDeclaration | SyntaxKind.ImportDeclaration | SyntaxKind.ImportClause | SyntaxKind.NamespaceImport | SyntaxKind.NamedImports | SyntaxKind.ImportSpecifier | SyntaxKind.ExportAssignment | SyntaxKind.ExportDeclaration | SyntaxKind.NamedExports | SyntaxKind.ExportSpecifier | SyntaxKind.MissingDeclaration | SyntaxKind.ExternalModuleReference | SyntaxKind.JsxElement | SyntaxKind.JsxSelfClosingElement | SyntaxKind.JsxOpeningElement | SyntaxKind.JsxClosingElement | SyntaxKind.JsxFragment | SyntaxKind.JsxOpeningFragment | SyntaxKind.JsxClosingFragment | SyntaxKind.JsxAttribute | SyntaxKind.JsxAttributes | SyntaxKind.JsxSpreadAttribute | SyntaxKind.JsxExpression | SyntaxKind.CaseClause | SyntaxKind.DefaultClause | SyntaxKind.HeritageClause | SyntaxKind.CatchClause | SyntaxKind.PropertyAssignment | SyntaxKind.ShorthandPropertyAssignment | SyntaxKind.SpreadAssignment | SyntaxKind.EnumMember | SyntaxKind.SourceFile | SyntaxKind.Bundle | SyntaxKind.UnparsedSource | SyntaxKind.InputFiles | SyntaxKind.JSDocTypeExpression | SyntaxKind.JSDocAllType | SyntaxKind.JSDocUnknownType | SyntaxKind.JSDocNullableType | SyntaxKind.JSDocNonNullableType | SyntaxKind.JSDocOptionalType | SyntaxKind.JSDocFunctionType | SyntaxKind.JSDocVariadicType | SyntaxKind.JSDocComment | SyntaxKind.JSDocTypeLiteral | SyntaxKind.JSDocSignature | SyntaxKind.JSDocTag | SyntaxKind.JSDocAugmentsTag | SyntaxKind.JSDocClassTag | SyntaxKind.JSDocCallbackTag | SyntaxKind.JSDocParameterTag | SyntaxKind.JSDocReturnTag | SyntaxKind.JSDocTypeTag | SyntaxKind.JSDocTemplateTag | SyntaxKind.JSDocTypedefTag | SyntaxKind.JSDocPropertyTag | SyntaxKind.SyntaxList | SyntaxKind.NotEmittedStatement | SyntaxKind.PartiallyEmittedExpression | SyntaxKind.CommaListExpression | SyntaxKind.MergeDeclarationMarker | SyntaxKind.EndOfDeclarationMarker | SyntaxKind.Count;
+    function getOperator(expression: Expression): SyntaxKind.Unknown | SyntaxKind.EndOfFileToken | SyntaxKind.SingleLineCommentTrivia | SyntaxKind.MultiLineCommentTrivia | SyntaxKind.NewLineTrivia | SyntaxKind.WhitespaceTrivia | SyntaxKind.ShebangTrivia | SyntaxKind.ConflictMarkerTrivia | SyntaxKind.NumericLiteral | SyntaxKind.StringLiteral | SyntaxKind.JsxText | SyntaxKind.JsxTextAllWhiteSpaces | SyntaxKind.RegularExpressionLiteral | SyntaxKind.NoSubstitutionTemplateLiteral | SyntaxKind.TemplateHead | SyntaxKind.TemplateMiddle | SyntaxKind.TemplateTail | SyntaxKind.OpenBraceToken | SyntaxKind.CloseBraceToken | SyntaxKind.OpenParenToken | SyntaxKind.CloseParenToken | SyntaxKind.OpenBracketToken | SyntaxKind.CloseBracketToken | SyntaxKind.DotToken | SyntaxKind.DotDotDotToken | SyntaxKind.SemicolonToken | SyntaxKind.CommaToken | SyntaxKind.LessThanToken | SyntaxKind.LessThanSlashToken | SyntaxKind.GreaterThanToken | SyntaxKind.LessThanEqualsToken | SyntaxKind.GreaterThanEqualsToken | SyntaxKind.EqualsEqualsToken | SyntaxKind.ExclamationEqualsToken | SyntaxKind.EqualsEqualsEqualsToken | SyntaxKind.ExclamationEqualsEqualsToken | SyntaxKind.EqualsGreaterThanToken | SyntaxKind.PlusToken | SyntaxKind.MinusToken | SyntaxKind.AsteriskToken | SyntaxKind.AsteriskAsteriskToken | SyntaxKind.SlashToken | SyntaxKind.PercentToken | SyntaxKind.PlusPlusToken | SyntaxKind.MinusMinusToken | SyntaxKind.LessThanLessThanToken | SyntaxKind.GreaterThanGreaterThanToken | SyntaxKind.GreaterThanGreaterThanGreaterThanToken | SyntaxKind.AmpersandToken | SyntaxKind.BarToken | SyntaxKind.CaretToken | SyntaxKind.ExclamationToken | SyntaxKind.TildeToken | SyntaxKind.AmpersandAmpersandToken | SyntaxKind.BarBarToken | SyntaxKind.QuestionToken | SyntaxKind.ColonToken | SyntaxKind.AtToken | SyntaxKind.EqualsToken | SyntaxKind.PlusEqualsToken | SyntaxKind.MinusEqualsToken | SyntaxKind.AsteriskEqualsToken | SyntaxKind.AsteriskAsteriskEqualsToken | SyntaxKind.SlashEqualsToken | SyntaxKind.PercentEqualsToken | SyntaxKind.LessThanLessThanEqualsToken | SyntaxKind.GreaterThanGreaterThanEqualsToken | SyntaxKind.GreaterThanGreaterThanGreaterThanEqualsToken | SyntaxKind.AmpersandEqualsToken | SyntaxKind.BarEqualsToken | SyntaxKind.CaretEqualsToken | SyntaxKind.Identifier | SyntaxKind.BreakKeyword | SyntaxKind.CaseKeyword | SyntaxKind.CatchKeyword | SyntaxKind.ClassKeyword | SyntaxKind.ConstKeyword | SyntaxKind.ContinueKeyword | SyntaxKind.DebuggerKeyword | SyntaxKind.DefaultKeyword | SyntaxKind.DeleteKeyword | SyntaxKind.DoKeyword | SyntaxKind.ElseKeyword | SyntaxKind.EnumKeyword | SyntaxKind.ExportKeyword | SyntaxKind.ExtendsKeyword | SyntaxKind.FalseKeyword | SyntaxKind.FinallyKeyword | SyntaxKind.ForKeyword | SyntaxKind.FunctionKeyword | SyntaxKind.IfKeyword | SyntaxKind.ImportKeyword | SyntaxKind.InKeyword | SyntaxKind.InstanceOfKeyword | SyntaxKind.NewKeyword | SyntaxKind.NullKeyword | SyntaxKind.ReturnKeyword | SyntaxKind.SuperKeyword | SyntaxKind.SwitchKeyword | SyntaxKind.ThisKeyword | SyntaxKind.ThrowKeyword | SyntaxKind.TrueKeyword | SyntaxKind.TryKeyword | SyntaxKind.TypeOfKeyword | SyntaxKind.VarKeyword | SyntaxKind.VoidKeyword | SyntaxKind.WhileKeyword | SyntaxKind.WithKeyword | SyntaxKind.ImplementsKeyword | SyntaxKind.InterfaceKeyword | SyntaxKind.LetKeyword | SyntaxKind.PackageKeyword | SyntaxKind.PrivateKeyword | SyntaxKind.ProtectedKeyword | SyntaxKind.PublicKeyword | SyntaxKind.StaticKeyword | SyntaxKind.YieldKeyword | SyntaxKind.AbstractKeyword | SyntaxKind.AsKeyword | SyntaxKind.AnyKeyword | SyntaxKind.AsyncKeyword | SyntaxKind.AwaitKeyword | SyntaxKind.BooleanKeyword | SyntaxKind.ConstructorKeyword | SyntaxKind.DeclareKeyword | SyntaxKind.GetKeyword | SyntaxKind.InferKeyword | SyntaxKind.IsKeyword | SyntaxKind.KeyOfKeyword | SyntaxKind.ModuleKeyword | SyntaxKind.NamespaceKeyword | SyntaxKind.NeverKeyword | SyntaxKind.ReadonlyKeyword | SyntaxKind.RequireKeyword | SyntaxKind.NumberKeyword | SyntaxKind.ObjectKeyword | SyntaxKind.SetKeyword | SyntaxKind.StringKeyword | SyntaxKind.SymbolKeyword | SyntaxKind.TypeKeyword | SyntaxKind.UndefinedKeyword | SyntaxKind.UniqueKeyword | SyntaxKind.UnknownKeyword | SyntaxKind.FromKeyword | SyntaxKind.GlobalKeyword | SyntaxKind.OfKeyword | SyntaxKind.QualifiedName | SyntaxKind.ComputedPropertyName | SyntaxKind.TypeParameter | SyntaxKind.Parameter | SyntaxKind.Decorator | SyntaxKind.PropertySignature | SyntaxKind.PropertyDeclaration | SyntaxKind.MethodSignature | SyntaxKind.MethodDeclaration | SyntaxKind.Constructor | SyntaxKind.GetAccessor | SyntaxKind.SetAccessor | SyntaxKind.CallSignature | SyntaxKind.ConstructSignature | SyntaxKind.IndexSignature | SyntaxKind.TypePredicate | SyntaxKind.TypeReference | SyntaxKind.FunctionType | SyntaxKind.ConstructorType | SyntaxKind.TypeQuery | SyntaxKind.TypeLiteral | SyntaxKind.ArrayType | SyntaxKind.TupleType | SyntaxKind.OptionalType | SyntaxKind.UnionType | SyntaxKind.IntersectionType | SyntaxKind.ConditionalType | SyntaxKind.InferType | SyntaxKind.ParenthesizedType | SyntaxKind.ThisType | SyntaxKind.TypeOperator | SyntaxKind.IndexedAccessType | SyntaxKind.MappedType | SyntaxKind.LiteralType | SyntaxKind.ImportType | SyntaxKind.ObjectBindingPattern | SyntaxKind.ArrayBindingPattern | SyntaxKind.BindingElement | SyntaxKind.ArrayLiteralExpression | SyntaxKind.ObjectLiteralExpression | SyntaxKind.PropertyAccessExpression | SyntaxKind.ElementAccessExpression | SyntaxKind.CallExpression | SyntaxKind.NewExpression | SyntaxKind.TaggedTemplateExpression | SyntaxKind.TypeAssertionExpression | SyntaxKind.ParenthesizedExpression | SyntaxKind.FunctionExpression | SyntaxKind.ArrowFunction | SyntaxKind.DeleteExpression | SyntaxKind.TypeOfExpression | SyntaxKind.VoidExpression | SyntaxKind.AwaitExpression | SyntaxKind.ConditionalExpression | SyntaxKind.TemplateExpression | SyntaxKind.YieldExpression | SyntaxKind.SpreadElement | SyntaxKind.ClassExpression | SyntaxKind.OmittedExpression | SyntaxKind.ExpressionWithTypeArguments | SyntaxKind.AsExpression | SyntaxKind.NonNullExpression | SyntaxKind.MetaProperty | SyntaxKind.SyntheticExpression | SyntaxKind.TemplateSpan | SyntaxKind.SemicolonClassElement | SyntaxKind.Block | SyntaxKind.VariableStatement | SyntaxKind.EmptyStatement | SyntaxKind.ExpressionStatement | SyntaxKind.IfStatement | SyntaxKind.DoStatement | SyntaxKind.WhileStatement | SyntaxKind.ForStatement | SyntaxKind.ForInStatement | SyntaxKind.ForOfStatement | SyntaxKind.ContinueStatement | SyntaxKind.BreakStatement | SyntaxKind.ReturnStatement | SyntaxKind.WithStatement | SyntaxKind.SwitchStatement | SyntaxKind.LabeledStatement | SyntaxKind.ThrowStatement | SyntaxKind.TryStatement | SyntaxKind.DebuggerStatement | SyntaxKind.VariableDeclaration | SyntaxKind.VariableDeclarationList | SyntaxKind.FunctionDeclaration | SyntaxKind.ClassDeclaration | SyntaxKind.InterfaceDeclaration | SyntaxKind.TypeAliasDeclaration | SyntaxKind.EnumDeclaration | SyntaxKind.ModuleDeclaration | SyntaxKind.ModuleBlock | SyntaxKind.CaseBlock | SyntaxKind.NamespaceExportDeclaration | SyntaxKind.ImportEqualsDeclaration | SyntaxKind.ImportDeclaration | SyntaxKind.ImportClause | SyntaxKind.NamespaceImport | SyntaxKind.NamedImports | SyntaxKind.ImportSpecifier | SyntaxKind.ExportAssignment | SyntaxKind.ExportDeclaration | SyntaxKind.NamedExports | SyntaxKind.ExportSpecifier | SyntaxKind.MissingDeclaration | SyntaxKind.ExternalModuleReference | SyntaxKind.JsxElement | SyntaxKind.JsxSelfClosingElement | SyntaxKind.JsxOpeningElement | SyntaxKind.JsxClosingElement | SyntaxKind.JsxFragment | SyntaxKind.JsxOpeningFragment | SyntaxKind.JsxClosingFragment | SyntaxKind.JsxAttribute | SyntaxKind.JsxAttributes | SyntaxKind.JsxSpreadAttribute | SyntaxKind.JsxExpression | SyntaxKind.CaseClause | SyntaxKind.DefaultClause | SyntaxKind.HeritageClause | SyntaxKind.CatchClause | SyntaxKind.PropertyAssignment | SyntaxKind.ShorthandPropertyAssignment | SyntaxKind.SpreadAssignment | SyntaxKind.EnumMember | SyntaxKind.SourceFile | SyntaxKind.Bundle | SyntaxKind.UnparsedSource | SyntaxKind.InputFiles | SyntaxKind.JSDocTypeExpression | SyntaxKind.JSDocAllType | SyntaxKind.JSDocUnknownType | SyntaxKind.JSDocNullableType | SyntaxKind.JSDocNonNullableType | SyntaxKind.JSDocOptionalType | SyntaxKind.JSDocFunctionType | SyntaxKind.JSDocVariadicType | SyntaxKind.JSDocComment | SyntaxKind.JSDocTypeLiteral | SyntaxKind.JSDocSignature | SyntaxKind.JSDocTag | SyntaxKind.JSDocAugmentsTag | SyntaxKind.JSDocClassTag | SyntaxKind.JSDocCallbackTag | SyntaxKind.JSDocParameterTag | SyntaxKind.JSDocReturnTag | SyntaxKind.JSDocTypeTag | SyntaxKind.JSDocTemplateTag | SyntaxKind.JSDocTypedefTag | SyntaxKind.JSDocPropertyTag | SyntaxKind.SyntaxList | SyntaxKind.NotEmittedStatement | SyntaxKind.PartiallyEmittedExpression | SyntaxKind.CommaListExpression | SyntaxKind.MergeDeclarationMarker | SyntaxKind.EndOfDeclarationMarker | SyntaxKind.Count;
     function getOperatorPrecedence(nodeKind: SyntaxKind, operatorKind: SyntaxKind, hasArguments?: boolean): number;
     function getBinaryOperatorPrecedence(kind: SyntaxKind): number;
     function createDiagnosticCollection(): DiagnosticCollection;

From f93f6ec17b40e8e555b66fcf534ac1db6b13e85d Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Tue, 12 Jun 2018 12:29:29 -0700
Subject: [PATCH 13/37] Better algorithm for combined co- and contra-variant
 inferences.

---
 src/compiler/checker.ts | 17 +++++++----------
 1 file changed, 7 insertions(+), 10 deletions(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 23b202bed76da..e67880e096248 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -11250,7 +11250,7 @@ namespace ts {
                 if (relation === identityRelation) {
                     return propertiesIdenticalTo(source, target);
                 }
-                const requireOptionalProperties = relation === subtypeRelation && !isObjectLiteralType(source) && !isEmptyArrayLiteralType(source);
+                const requireOptionalProperties = relation === subtypeRelation && !isObjectLiteralType(source) && !isEmptyArrayLiteralType(source) && !isTupleType(source);
                 const unmatchedProperty = getUnmatchedProperty(source, target, requireOptionalProperties);
                 if (unmatchedProperty) {
                     if (reportErrors) {
@@ -12963,17 +12963,14 @@ namespace ts {
             if (!inferredType) {
                 const signature = context.signature;
                 if (signature) {
+                    if (inference.contraCandidates) {
+                        // If we have contravariant inferences we find the best common subtype and treat
+                        // that as a single covariant candidate.
+                        inference.candidates = append(inference.candidates, getContravariantInference(inference));
+                        inference.contraCandidates = undefined;
+                    }
                     if (inference.candidates) {
                         inferredType = getCovariantInference(inference, context, signature);
-                        // If we have inferred 'never' but have contravariant candidates. To get a more specific type we
-                        // infer from the contravariant candidates instead.
-                        if (inferredType.flags & TypeFlags.Never && inference.contraCandidates) {
-                            inferredType = getContravariantInference(inference);
-                        }
-                    }
-                    else if (inference.contraCandidates) {
-                        // We only have contravariant inferences, infer the best common subtype of those
-                        inferredType = getContravariantInference(inference);
                     }
                     else if (context.flags & InferenceFlags.NoDefault) {
                         // We use silentNeverType as the wildcard that signals no inferences.

From 6bdedad22feb32305ea1bc756a0f1ec62d9475ef Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Tue, 12 Jun 2018 12:39:56 -0700
Subject: [PATCH 14/37] Accept new baselines

---
 .../initializedDestructuringAssignmentTypes.types    |  2 +-
 tests/baselines/reference/strictFunctionTypes1.js    |  6 +++---
 tests/baselines/reference/strictFunctionTypes1.types | 12 ++++++------
 3 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/tests/baselines/reference/initializedDestructuringAssignmentTypes.types b/tests/baselines/reference/initializedDestructuringAssignmentTypes.types
index 55ddfa4f56b52..542c693c5258a 100644
--- a/tests/baselines/reference/initializedDestructuringAssignmentTypes.types
+++ b/tests/baselines/reference/initializedDestructuringAssignmentTypes.types
@@ -3,7 +3,7 @@ const [, a = ''] = ''.match('') || [];
 > : undefined
 >a : string
 >'' : ""
->''.match('') || [] : RegExpMatchArray | [undefined, ""]
+>''.match('') || [] : RegExpMatchArray
 >''.match('') : RegExpMatchArray
 >''.match : (regexp: string | RegExp) => RegExpMatchArray
 >'' : ""
diff --git a/tests/baselines/reference/strictFunctionTypes1.js b/tests/baselines/reference/strictFunctionTypes1.js
index 94ee06f88f8fe..45d28f72501c5 100644
--- a/tests/baselines/reference/strictFunctionTypes1.js
+++ b/tests/baselines/reference/strictFunctionTypes1.js
@@ -50,11 +50,11 @@ declare function fo(x: Object): void;
 declare function fs(x: string): void;
 declare function fx(f: (x: "def") => void): void;
 declare const x1: (x: string) => void;
-declare const x2 = "abc";
-declare const x3: string;
+declare const x2: string;
+declare const x3: Object;
 declare const x4: Func<string>;
 declare const never: never;
 declare const x10: string;
-declare const x11: "def";
+declare const x11: Object;
 declare function foo<T>(a: ReadonlyArray<T>): T;
 declare let x: never;
diff --git a/tests/baselines/reference/strictFunctionTypes1.types b/tests/baselines/reference/strictFunctionTypes1.types
index b915e0b5f6bcf..50b37f3e63b7f 100644
--- a/tests/baselines/reference/strictFunctionTypes1.types
+++ b/tests/baselines/reference/strictFunctionTypes1.types
@@ -78,16 +78,16 @@ const x1 = f1(fo, fs);  // (x: string) => void
 >fs : (x: string) => void
 
 const x2 = f2("abc", fo, fs);  // "abc"
->x2 : "abc"
->f2("abc", fo, fs) : "abc"
+>x2 : string
+>f2("abc", fo, fs) : string
 >f2 : <T>(obj: T, f1: (x: T) => void, f2: (x: T) => void) => T
 >"abc" : "abc"
 >fo : (x: Object) => void
 >fs : (x: string) => void
 
 const x3 = f3("abc", fo, fx);  // "abc" | "def"
->x3 : "def" | "abc"
->f3("abc", fo, fx) : "def" | "abc"
+>x3 : Object
+>f3("abc", fo, fx) : Object
 >f3 : <T>(obj: T, f1: (x: T) => void, f2: (f: (x: T) => void) => void) => T
 >"abc" : "abc"
 >fo : (x: Object) => void
@@ -112,8 +112,8 @@ const x10 = f2(never, fo, fs);  // string
 >fs : (x: string) => void
 
 const x11 = f3(never, fo, fx);  // "def"
->x11 : "def"
->f3(never, fo, fx) : "def"
+>x11 : Object
+>f3(never, fo, fx) : Object
 >f3 : <T>(obj: T, f1: (x: T) => void, f2: (f: (x: T) => void) => void) => T
 >never : never
 >fo : (x: Object) => void

From 58d55832ed8fd8c5a3b8bc8cf96ae3f1bd2f4648 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Wed, 13 Jun 2018 13:51:14 -0700
Subject: [PATCH 15/37] Minor fixes

---
 src/compiler/checker.ts | 42 ++++++++++++++++++++++++-----------------
 1 file changed, 25 insertions(+), 17 deletions(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index e67880e096248..5fa4ec5d36356 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -10152,23 +10152,23 @@ namespace ts {
                 return Ternary.True;
             }
 
-            const sourceCount = getParameterCount(source);
             const targetCount = getParameterCount(target);
             if (!hasEffectiveRestParameter(target) && getMinArgumentCount(source) > targetCount) {
                 return Ternary.False;
             }
 
+            if (source.typeParameters && source.typeParameters !== target.typeParameters) {
+                target = getCanonicalSignature(target);
+                source = instantiateSignatureInContextOf(source, target, /*contextualMapper*/ undefined, compareTypes);
+            }
+
+            const sourceCount = getParameterCount(source);
             const sourceRestTypeParameter = getRestTypeParameter(source);
             const targetRestTypeParameter = sourceRestTypeParameter ? getRestTypeParameter(target) : undefined;
             if (sourceRestTypeParameter && !(targetRestTypeParameter && sourceCount === targetCount)) {
                 return Ternary.False;
             }
 
-            if (source.typeParameters && source.typeParameters !== target.typeParameters) {
-                target = getCanonicalSignature(target);
-                source = instantiateSignatureInContextOf(source, target, /*contextualMapper*/ undefined, compareTypes);
-            }
-
             const kind = target.declaration ? target.declaration.kind : SyntaxKind.Unknown;
             const strictVariance = !callbackCheck && strictFunctionTypes && kind !== SyntaxKind.MethodDeclaration &&
                 kind !== SyntaxKind.MethodSignature && kind !== SyntaxKind.Constructor;
@@ -12374,27 +12374,34 @@ namespace ts {
 
         function forEachMatchingParameterType(source: Signature, target: Signature, callback: (s: Type, t: Type) => void) {
             const sourceCount = getParameterCount(source);
-            const targetRest = getRestTypeParameter(target);
-            const paramCount = targetRest ? Math.min(getParameterCount(target) - 1, sourceCount) : sourceCount;
+            const targetCount = getParameterCount(target);
+            const sourceHasRest = hasEffectiveRestParameter(source);
+            const targetHasRest = hasEffectiveRestParameter(target);
+            const maxCount = sourceHasRest && targetHasRest ? Math.max(sourceCount, targetCount) :
+                sourceHasRest ? targetCount :
+                targetHasRest ? sourceCount :
+                Math.min(sourceCount, targetCount);
+            const targetRestTypeVariable = getRestTypeParameter(target);
+            const paramCount = targetRestTypeVariable ? Math.min(targetCount - 1, maxCount) : maxCount;
             for (let i = 0; i < paramCount; i++) {
                 callback(getTypeAtPosition(source, i), getTypeAtPosition(target, i));
             }
-            if (targetRest) {
-                const sourceRest = getRestTypeParameter(source);
-                if (sourceRest && paramCount === sourceCount - 1) {
-                    callback(sourceRest, targetRest);
+            if (targetRestTypeVariable) {
+                const sourceRestTypeVariable = getRestTypeParameter(source);
+                if (sourceRestTypeVariable && paramCount === sourceCount - 1) {
+                    callback(sourceRestTypeVariable, targetRestTypeVariable);
                 }
                 else {
                     const types = [];
                     const names = [];
-                    for (let i = paramCount; i < sourceCount; i++) {
+                    for (let i = paramCount; i < maxCount; i++) {
                         types.push(getTypeAtPosition(source, i));
                         names.push(getParameterNameAtPosition(source, i));
                     }
                     const minArgumentCount = getMinArgumentCount(source);
                     const minLength = minArgumentCount < paramCount ? 0 : minArgumentCount - paramCount;
-                    const rest = hasEffectiveRestParameter(source) ? createArrayType(getUnionType(types)) : createTupleType(types, minLength, names);
-                    callback(rest, targetRest);
+                    const rest = sourceHasRest ? createArrayType(getUnionType(types)) : createTupleType(types, minLength, names);
+                    callback(rest, targetRestTypeVariable);
                 }
             }
         }
@@ -17824,9 +17831,10 @@ namespace ts {
         // Instantiate a generic signature in the context of a non-generic signature (section 3.8.5 in TypeScript spec)
         function instantiateSignatureInContextOf(signature: Signature, contextualSignature: Signature, contextualMapper?: TypeMapper, compareTypes?: TypeComparer): Signature {
             const context = createInferenceContext(signature.typeParameters!, signature, InferenceFlags.InferUnionTypes, compareTypes);
-            forEachMatchingParameterType(contextualSignature, signature, (source, target) => {
+            const sourceSignature = contextualMapper ? instantiateSignature(contextualSignature, contextualMapper) : contextualSignature;
+            forEachMatchingParameterType(sourceSignature, signature, (source, target) => {
                 // Type parameters from outer context referenced by source type are fixed by instantiation of the source type
-                inferTypes(context.inferences, instantiateType(source, contextualMapper || identityMapper), target);
+                inferTypes(context.inferences, source, target);
             });
             if (!contextualMapper) {
                 inferTypes(context.inferences, getReturnTypeOfSignature(contextualSignature), getReturnTypeOfSignature(signature), InferencePriority.ReturnType);

From cee75aa9fc213f8086773b15c791c8dfcca860f5 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Wed, 13 Jun 2018 17:00:35 -0700
Subject: [PATCH 16/37] Properly widen type element types in inferred rest
 parameter types

---
 src/compiler/checker.ts | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 5fa4ec5d36356..e13aefc4c0369 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -17959,7 +17959,8 @@ namespace ts {
                 }
             }
             const contextualType = getIndexTypeOfType(restType, IndexKind.Number) || anyType;
-            const types: Type[] = [];
+            const hasPrimitiveContextualType = maybeTypeOfKind(contextualType, TypeFlags.Primitive | TypeFlags.Index);
+            const types = [];
             let hasSpreadExpression = false;
             for (let i = index; i < argCount; i++) {
                 let argType = getEffectiveArgumentType(node, i);
@@ -17967,7 +17968,7 @@ namespace ts {
                     argType = checkExpressionWithContextualType(args[i], contextualType, context);
                     hasSpreadExpression = hasSpreadExpression || args[i].kind === SyntaxKind.SpreadElement;
                 }
-                types.push(argType);
+                types.push(hasPrimitiveContextualType ? getRegularTypeOfLiteralType(argType) : getWidenedLiteralType(argType));
             }
             return hasSpreadExpression ? createArrayType(getUnionType(types)) : createTupleType(types);
         }

From 0cc0fad3817e7c11cc4493533215b5b30af9bd0c Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Thu, 14 Jun 2018 13:06:37 -0700
Subject: [PATCH 17/37] Add tests

---
 .../types/rest/genericRestParameters1.ts      | 157 ++++++++++++++++++
 .../types/tuple/optionalTupleElements1.ts     |  63 +++++++
 2 files changed, 220 insertions(+)
 create mode 100644 tests/cases/conformance/types/rest/genericRestParameters1.ts
 create mode 100644 tests/cases/conformance/types/tuple/optionalTupleElements1.ts

diff --git a/tests/cases/conformance/types/rest/genericRestParameters1.ts b/tests/cases/conformance/types/rest/genericRestParameters1.ts
new file mode 100644
index 0000000000000..70c53774ce4b9
--- /dev/null
+++ b/tests/cases/conformance/types/rest/genericRestParameters1.ts
@@ -0,0 +1,157 @@
+// @strict: true
+// @declaration: true
+
+declare let f1: (...x: [number, string, boolean]) => void;
+declare let f2: (x0: number, x1: string, x2: boolean) => void;
+
+f1 = f2;
+f2 = f1;
+
+declare const t3: [number, string, boolean];
+declare const t2: [string, boolean];
+declare const t1: [boolean];
+declare const t0: [];
+
+declare const ns: [number, string];
+declare const sn: [string, number];
+
+f1(42, "hello", true);
+f1(t3[0], t3[1], t3[2]);
+f1(...t3);
+f1(42, ...t2);
+f1(42, "hello", ...t1);
+f1(42, "hello", true, ...t0);
+f1(ns[0], ns[1], true);
+f1(...ns, true);  // Error, tuple spread only expanded when last
+
+f2(42, "hello", true);
+f2(t3[0], t3[1], t3[2]);
+f2(...t3);
+f2(42, ...t2);
+f2(42, "hello", ...t1);
+f2(42, "hello", true, ...t0);
+f2(ns[0], ns[1], true);
+f2(...ns, true);  // Error, tuple spread only expanded when last
+
+declare function f10<T extends unknown[]>(...args: T): T;
+
+const x10 = f10(42, "hello", true);  // [number, string, boolean]
+const x11 = f10(42, "hello");  // [number, string]
+const x12 = f10(42);  // [number]
+const x13 = f10();  // []
+const x14 = f10(...t3);  // [number, string, boolean]
+const x15 = f10(42, ...t2);  // [number, string, boolean]
+const x16 = f10(42, "hello", ...t1);  // [number, string, boolean]
+const x17 = f10(42, "hello", true, ...t0);  // [number, string, boolean]
+const x18 = f10(...ns, true);  // (string | number | boolean)[]
+
+function g10<U extends string[], V extends [number, number]>(u: U, v: V) {
+    let x1 = f10(...u);  // U
+    let x2 = f10(...v);  // V
+    let x3 = f10(1, ...u);  // (string | number)[]
+    let x4 = f10(...u, ...v);  // (string | number)[]
+}
+
+declare function f11<T extends (string | number | boolean)[]>(...args: T): T;
+
+const z10 = f11(42, "hello", true);  // [42, "hello", true]
+const z11 = f11(42, "hello");  // [42, "hello"]
+const z12 = f11(42);  // [42]
+const z13 = f11();  // []
+const z14 = f11(...t3);  // [number, string, boolean]
+const z15 = f11(42, ...t2);  // [42, string, boolean]
+const z16 = f11(42, "hello", ...t1);  // [42, "hello", boolean]
+const z17 = f11(42, "hello", true, ...t0);  // [42, "hello", true]
+const z18 = f11(...ns, true);  // (string | number | true)[]
+
+function g11<U extends string[], V extends [number, number]>(u: U, v: V) {
+    let x1 = f11(...u);  // U
+    let x2 = f11(...v);  // V
+    let x3 = f11(1, ...u);  // (string | 1)[]
+    let x4 = f11(...u, ...v);  // (string | number)[]
+}
+
+function call<T extends unknown[], U>(f: (...args: T) => U, ...args: T) {
+    return f(...args);
+}
+
+function callr<T extends unknown[], U>(args: T, f: (...args: T) => U) {
+    return f(...args);
+}
+
+declare function f15(a: string, b: number): string | number;
+declare function f16<A, B>(a: A, b: B): A | B;
+
+let x20 = call((x, y) => x + y, 10, 20);  // number
+let x21 = call((x, y) => x + y, 10, "hello");  // string
+let x22 = call(f15, "hello", 42);  // string | number
+let x23 = call(f16, "hello", 42);  // unknown
+let x24 = call<[string, number], string | number>(f16, "hello", 42);  // string | number
+
+let x30 = callr(sn, (x, y) => x + y);  // string
+let x31 = callr(sn, f15);  // string | number
+let x32 = callr(sn, f16);  // string | number
+
+function bind<T, U extends unknown[], V>(f: (x: T, ...rest: U) => V, x: T) {
+    return (...rest: U) => f(x, ...rest);
+}
+
+declare const f20: (x: number, y: string, z: boolean) => string[];
+
+const f21 = bind(f20, 42);  // (y: string, z: boolean) => string[]
+const f22 = bind(f21, "hello");  // (z: boolean) => string[]
+const f23 = bind(f22, true);  // () => string[]
+
+f20(42, "hello", true);
+f21("hello", true);
+f22(true);
+f23();
+
+declare const g20: (x: number, y?: string, z?: boolean) => string[];
+
+const g21 = bind(g20, 42);  // (y: string, z: boolean) => string[]
+const g22 = bind(g21, "hello");  // (z: boolean) => string[]
+const g23 = bind(g22, true);  // () => string[]
+
+g20(42, "hello", true);
+g20(42, "hello");
+g20(42);
+g21("hello", true);
+g21("hello");
+g21();
+g22(true);
+g22();
+g23();
+
+declare function f30<T, U extends ((x: T) => any)[]>(x: T, ...args: U): U;
+
+const c30 = f30(42, x => "" + x, x => x + 1);  // [(x: number) => string, (x: number) => number]
+
+type Parameters<T extends Function> = T extends ((...args: infer U) => any) | (new(...args: infer U) => any) ? U : any[];
+
+type T01 = Parameters<(x: number, y: string, z: boolean) => void>;
+type T02 = Parameters<(...args: [number, string, boolean]) => void>;
+type T03 = Parameters<new (x: number, y: string, z: boolean) => void>;
+type T04 = Parameters<new (...args: [number, string, boolean]) => void>;
+type T05<T> = Parameters<(...args: T[]) => void>;
+type T06<T> = Parameters<new (...args: []) => void>;
+type T07<T extends any[]> = Parameters<(...args: T) => void>;
+type T08<T extends any[]> = Parameters<new (...args: T) => void>;
+type T09 = Parameters<Function>;
+
+type Record1 = {
+  move: [number, 'left' | 'right'];
+  jump: [number, 'up' | 'down'];
+  stop: string;
+  done: [];
+}
+
+type EventType<T> = {
+  emit<K extends keyof T = keyof T>(e: K, ...payload: T[K] extends any[] ? T[K] : [T[K]]): void; 
+}
+
+declare var events: EventType<Record1>;
+events.emit('move', 10, 'left');
+events.emit('jump', 20, 'up');
+events.emit('stop', 'Bye!');
+events.emit('done');
diff --git a/tests/cases/conformance/types/tuple/optionalTupleElements1.ts b/tests/cases/conformance/types/tuple/optionalTupleElements1.ts
new file mode 100644
index 0000000000000..60570c402a10b
--- /dev/null
+++ b/tests/cases/conformance/types/tuple/optionalTupleElements1.ts
@@ -0,0 +1,63 @@
+// @strict: true
+// @declaration: true
+
+type T1 = [number, string, boolean];
+type T2 = [number, string, boolean?];
+type T3 = [number, string?, boolean?];
+type T4 = [number?, string?, boolean?];
+
+type L1 = T1["length"];
+type L2 = T2["length"];
+type L3 = T3["length"];
+type L4 = T4["length"];
+
+function f1(t1: T1, t2: T2, t3: T3, t4: T4) {
+    t1 = t1;
+    t1 = t2;  // Error
+    t1 = t3;  // Error
+    t1 = t4;  // Error
+    t2 = t1;
+    t2 = t2;
+    t2 = t3;  // Error
+    t2 = t4;  // Error
+    t3 = t1;
+    t3 = t2;
+    t3 = t3;
+    t3 = t4;  // Error
+    t4 = t1;
+    t4 = t2;
+    t4 = t3;
+    t4 = t4;
+}
+
+type T5 = [number, string?, boolean];
+type L5 = T5["length"];
+
+function f2(t1: T1, t2: T2, t3: T3, t4: T4, t5: T5) {
+    t1 = t5;  // Error
+    t2 = t5;  // Error
+    t3 = t5;
+    t4 = t5;
+    t5 = t5;
+    t5 = t1;
+    t5 = t2;  // Error
+    t5 = t3;  // Error
+    t5 = t4;  // Error
+    t5 = t5;
+}
+
+let t2: T2;
+let t3: T3;
+let t4: T4;
+let t5: T5;
+
+t2 = [42, "hello"];
+t3 = [42, "hello"];
+t3 = [42,,true]
+t3 = [42];
+t4 = [42, "hello"];
+t4 = [42,,true];
+t4 = [,"hello", true];
+t4 = [,,true];
+t4 = [];
+t5 = [42,,true];

From 09f17bcf574af454ca93b048cf58a4eb88779433 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Thu, 14 Jun 2018 13:06:48 -0700
Subject: [PATCH 18/37] Accept new baselines

---
 .../genericRestParameters1.errors.txt         | 164 ++++
 .../reference/genericRestParameters1.js       | 334 +++++++
 .../reference/genericRestParameters1.symbols  | 624 +++++++++++++
 .../reference/genericRestParameters1.types    | 851 ++++++++++++++++++
 .../optionalTupleElements1.errors.txt         | 157 ++++
 .../reference/optionalTupleElements1.js       | 128 +++
 .../reference/optionalTupleElements1.symbols  | 212 +++++
 .../reference/optionalTupleElements1.types    | 280 ++++++
 8 files changed, 2750 insertions(+)
 create mode 100644 tests/baselines/reference/genericRestParameters1.errors.txt
 create mode 100644 tests/baselines/reference/genericRestParameters1.js
 create mode 100644 tests/baselines/reference/genericRestParameters1.symbols
 create mode 100644 tests/baselines/reference/genericRestParameters1.types
 create mode 100644 tests/baselines/reference/optionalTupleElements1.errors.txt
 create mode 100644 tests/baselines/reference/optionalTupleElements1.js
 create mode 100644 tests/baselines/reference/optionalTupleElements1.symbols
 create mode 100644 tests/baselines/reference/optionalTupleElements1.types

diff --git a/tests/baselines/reference/genericRestParameters1.errors.txt b/tests/baselines/reference/genericRestParameters1.errors.txt
new file mode 100644
index 0000000000000..13828435b5ad6
--- /dev/null
+++ b/tests/baselines/reference/genericRestParameters1.errors.txt
@@ -0,0 +1,164 @@
+tests/cases/conformance/types/rest/genericRestParameters1.ts(22,1): error TS2556: Expected 3 arguments, but got 1 or more.
+tests/cases/conformance/types/rest/genericRestParameters1.ts(31,1): error TS2556: Expected 3 arguments, but got 1 or more.
+
+
+==== tests/cases/conformance/types/rest/genericRestParameters1.ts (2 errors) ====
+    declare let f1: (...x: [number, string, boolean]) => void;
+    declare let f2: (x0: number, x1: string, x2: boolean) => void;
+    
+    f1 = f2;
+    f2 = f1;
+    
+    declare const t3: [number, string, boolean];
+    declare const t2: [string, boolean];
+    declare const t1: [boolean];
+    declare const t0: [];
+    
+    declare const ns: [number, string];
+    declare const sn: [string, number];
+    
+    f1(42, "hello", true);
+    f1(t3[0], t3[1], t3[2]);
+    f1(...t3);
+    f1(42, ...t2);
+    f1(42, "hello", ...t1);
+    f1(42, "hello", true, ...t0);
+    f1(ns[0], ns[1], true);
+    f1(...ns, true);  // Error, tuple spread only expanded when last
+    ~~~~~~~~~~~~~~~
+!!! error TS2556: Expected 3 arguments, but got 1 or more.
+    
+    f2(42, "hello", true);
+    f2(t3[0], t3[1], t3[2]);
+    f2(...t3);
+    f2(42, ...t2);
+    f2(42, "hello", ...t1);
+    f2(42, "hello", true, ...t0);
+    f2(ns[0], ns[1], true);
+    f2(...ns, true);  // Error, tuple spread only expanded when last
+    ~~~~~~~~~~~~~~~
+!!! error TS2556: Expected 3 arguments, but got 1 or more.
+    
+    declare function f10<T extends unknown[]>(...args: T): T;
+    
+    const x10 = f10(42, "hello", true);  // [number, string, boolean]
+    const x11 = f10(42, "hello");  // [number, string]
+    const x12 = f10(42);  // [number]
+    const x13 = f10();  // []
+    const x14 = f10(...t3);  // [number, string, boolean]
+    const x15 = f10(42, ...t2);  // [number, string, boolean]
+    const x16 = f10(42, "hello", ...t1);  // [number, string, boolean]
+    const x17 = f10(42, "hello", true, ...t0);  // [number, string, boolean]
+    const x18 = f10(...ns, true);  // (string | number | boolean)[]
+    
+    function g10<U extends string[], V extends [number, number]>(u: U, v: V) {
+        let x1 = f10(...u);  // U
+        let x2 = f10(...v);  // V
+        let x3 = f10(1, ...u);  // (string | number)[]
+        let x4 = f10(...u, ...v);  // (string | number)[]
+    }
+    
+    declare function f11<T extends (string | number | boolean)[]>(...args: T): T;
+    
+    const z10 = f11(42, "hello", true);  // [42, "hello", true]
+    const z11 = f11(42, "hello");  // [42, "hello"]
+    const z12 = f11(42);  // [42]
+    const z13 = f11();  // []
+    const z14 = f11(...t3);  // [number, string, boolean]
+    const z15 = f11(42, ...t2);  // [42, string, boolean]
+    const z16 = f11(42, "hello", ...t1);  // [42, "hello", boolean]
+    const z17 = f11(42, "hello", true, ...t0);  // [42, "hello", true]
+    const z18 = f11(...ns, true);  // (string | number | true)[]
+    
+    function g11<U extends string[], V extends [number, number]>(u: U, v: V) {
+        let x1 = f11(...u);  // U
+        let x2 = f11(...v);  // V
+        let x3 = f11(1, ...u);  // (string | 1)[]
+        let x4 = f11(...u, ...v);  // (string | number)[]
+    }
+    
+    function call<T extends unknown[], U>(f: (...args: T) => U, ...args: T) {
+        return f(...args);
+    }
+    
+    function callr<T extends unknown[], U>(args: T, f: (...args: T) => U) {
+        return f(...args);
+    }
+    
+    declare function f15(a: string, b: number): string | number;
+    declare function f16<A, B>(a: A, b: B): A | B;
+    
+    let x20 = call((x, y) => x + y, 10, 20);  // number
+    let x21 = call((x, y) => x + y, 10, "hello");  // string
+    let x22 = call(f15, "hello", 42);  // string | number
+    let x23 = call(f16, "hello", 42);  // unknown
+    let x24 = call<[string, number], string | number>(f16, "hello", 42);  // string | number
+    
+    let x30 = callr(sn, (x, y) => x + y);  // string
+    let x31 = callr(sn, f15);  // string | number
+    let x32 = callr(sn, f16);  // string | number
+    
+    function bind<T, U extends unknown[], V>(f: (x: T, ...rest: U) => V, x: T) {
+        return (...rest: U) => f(x, ...rest);
+    }
+    
+    declare const f20: (x: number, y: string, z: boolean) => string[];
+    
+    const f21 = bind(f20, 42);  // (y: string, z: boolean) => string[]
+    const f22 = bind(f21, "hello");  // (z: boolean) => string[]
+    const f23 = bind(f22, true);  // () => string[]
+    
+    f20(42, "hello", true);
+    f21("hello", true);
+    f22(true);
+    f23();
+    
+    declare const g20: (x: number, y?: string, z?: boolean) => string[];
+    
+    const g21 = bind(g20, 42);  // (y: string, z: boolean) => string[]
+    const g22 = bind(g21, "hello");  // (z: boolean) => string[]
+    const g23 = bind(g22, true);  // () => string[]
+    
+    g20(42, "hello", true);
+    g20(42, "hello");
+    g20(42);
+    g21("hello", true);
+    g21("hello");
+    g21();
+    g22(true);
+    g22();
+    g23();
+    
+    declare function f30<T, U extends ((x: T) => any)[]>(x: T, ...args: U): U;
+    
+    const c30 = f30(42, x => "" + x, x => x + 1);  // [(x: number) => string, (x: number) => number]
+    
+    type Parameters<T extends Function> = T extends ((...args: infer U) => any) | (new(...args: infer U) => any) ? U : any[];
+    
+    type T01 = Parameters<(x: number, y: string, z: boolean) => void>;
+    type T02 = Parameters<(...args: [number, string, boolean]) => void>;
+    type T03 = Parameters<new (x: number, y: string, z: boolean) => void>;
+    type T04 = Parameters<new (...args: [number, string, boolean]) => void>;
+    type T05<T> = Parameters<(...args: T[]) => void>;
+    type T06<T> = Parameters<new (...args: []) => void>;
+    type T07<T extends any[]> = Parameters<(...args: T) => void>;
+    type T08<T extends any[]> = Parameters<new (...args: T) => void>;
+    type T09 = Parameters<Function>;
+    
+    type Record1 = {
+      move: [number, 'left' | 'right'];
+      jump: [number, 'up' | 'down'];
+      stop: string;
+      done: [];
+    }
+    
+    type EventType<T> = {
+      emit<K extends keyof T = keyof T>(e: K, ...payload: T[K] extends any[] ? T[K] : [T[K]]): void; 
+    }
+    
+    declare var events: EventType<Record1>;
+    events.emit('move', 10, 'left');
+    events.emit('jump', 20, 'up');
+    events.emit('stop', 'Bye!');
+    events.emit('done');
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/genericRestParameters1.js b/tests/baselines/reference/genericRestParameters1.js
new file mode 100644
index 0000000000000..6817bb43e5142
--- /dev/null
+++ b/tests/baselines/reference/genericRestParameters1.js
@@ -0,0 +1,334 @@
+//// [genericRestParameters1.ts]
+declare let f1: (...x: [number, string, boolean]) => void;
+declare let f2: (x0: number, x1: string, x2: boolean) => void;
+
+f1 = f2;
+f2 = f1;
+
+declare const t3: [number, string, boolean];
+declare const t2: [string, boolean];
+declare const t1: [boolean];
+declare const t0: [];
+
+declare const ns: [number, string];
+declare const sn: [string, number];
+
+f1(42, "hello", true);
+f1(t3[0], t3[1], t3[2]);
+f1(...t3);
+f1(42, ...t2);
+f1(42, "hello", ...t1);
+f1(42, "hello", true, ...t0);
+f1(ns[0], ns[1], true);
+f1(...ns, true);  // Error, tuple spread only expanded when last
+
+f2(42, "hello", true);
+f2(t3[0], t3[1], t3[2]);
+f2(...t3);
+f2(42, ...t2);
+f2(42, "hello", ...t1);
+f2(42, "hello", true, ...t0);
+f2(ns[0], ns[1], true);
+f2(...ns, true);  // Error, tuple spread only expanded when last
+
+declare function f10<T extends unknown[]>(...args: T): T;
+
+const x10 = f10(42, "hello", true);  // [number, string, boolean]
+const x11 = f10(42, "hello");  // [number, string]
+const x12 = f10(42);  // [number]
+const x13 = f10();  // []
+const x14 = f10(...t3);  // [number, string, boolean]
+const x15 = f10(42, ...t2);  // [number, string, boolean]
+const x16 = f10(42, "hello", ...t1);  // [number, string, boolean]
+const x17 = f10(42, "hello", true, ...t0);  // [number, string, boolean]
+const x18 = f10(...ns, true);  // (string | number | boolean)[]
+
+function g10<U extends string[], V extends [number, number]>(u: U, v: V) {
+    let x1 = f10(...u);  // U
+    let x2 = f10(...v);  // V
+    let x3 = f10(1, ...u);  // (string | number)[]
+    let x4 = f10(...u, ...v);  // (string | number)[]
+}
+
+declare function f11<T extends (string | number | boolean)[]>(...args: T): T;
+
+const z10 = f11(42, "hello", true);  // [42, "hello", true]
+const z11 = f11(42, "hello");  // [42, "hello"]
+const z12 = f11(42);  // [42]
+const z13 = f11();  // []
+const z14 = f11(...t3);  // [number, string, boolean]
+const z15 = f11(42, ...t2);  // [42, string, boolean]
+const z16 = f11(42, "hello", ...t1);  // [42, "hello", boolean]
+const z17 = f11(42, "hello", true, ...t0);  // [42, "hello", true]
+const z18 = f11(...ns, true);  // (string | number | true)[]
+
+function g11<U extends string[], V extends [number, number]>(u: U, v: V) {
+    let x1 = f11(...u);  // U
+    let x2 = f11(...v);  // V
+    let x3 = f11(1, ...u);  // (string | 1)[]
+    let x4 = f11(...u, ...v);  // (string | number)[]
+}
+
+function call<T extends unknown[], U>(f: (...args: T) => U, ...args: T) {
+    return f(...args);
+}
+
+function callr<T extends unknown[], U>(args: T, f: (...args: T) => U) {
+    return f(...args);
+}
+
+declare function f15(a: string, b: number): string | number;
+declare function f16<A, B>(a: A, b: B): A | B;
+
+let x20 = call((x, y) => x + y, 10, 20);  // number
+let x21 = call((x, y) => x + y, 10, "hello");  // string
+let x22 = call(f15, "hello", 42);  // string | number
+let x23 = call(f16, "hello", 42);  // unknown
+let x24 = call<[string, number], string | number>(f16, "hello", 42);  // string | number
+
+let x30 = callr(sn, (x, y) => x + y);  // string
+let x31 = callr(sn, f15);  // string | number
+let x32 = callr(sn, f16);  // string | number
+
+function bind<T, U extends unknown[], V>(f: (x: T, ...rest: U) => V, x: T) {
+    return (...rest: U) => f(x, ...rest);
+}
+
+declare const f20: (x: number, y: string, z: boolean) => string[];
+
+const f21 = bind(f20, 42);  // (y: string, z: boolean) => string[]
+const f22 = bind(f21, "hello");  // (z: boolean) => string[]
+const f23 = bind(f22, true);  // () => string[]
+
+f20(42, "hello", true);
+f21("hello", true);
+f22(true);
+f23();
+
+declare const g20: (x: number, y?: string, z?: boolean) => string[];
+
+const g21 = bind(g20, 42);  // (y: string, z: boolean) => string[]
+const g22 = bind(g21, "hello");  // (z: boolean) => string[]
+const g23 = bind(g22, true);  // () => string[]
+
+g20(42, "hello", true);
+g20(42, "hello");
+g20(42);
+g21("hello", true);
+g21("hello");
+g21();
+g22(true);
+g22();
+g23();
+
+declare function f30<T, U extends ((x: T) => any)[]>(x: T, ...args: U): U;
+
+const c30 = f30(42, x => "" + x, x => x + 1);  // [(x: number) => string, (x: number) => number]
+
+type Parameters<T extends Function> = T extends ((...args: infer U) => any) | (new(...args: infer U) => any) ? U : any[];
+
+type T01 = Parameters<(x: number, y: string, z: boolean) => void>;
+type T02 = Parameters<(...args: [number, string, boolean]) => void>;
+type T03 = Parameters<new (x: number, y: string, z: boolean) => void>;
+type T04 = Parameters<new (...args: [number, string, boolean]) => void>;
+type T05<T> = Parameters<(...args: T[]) => void>;
+type T06<T> = Parameters<new (...args: []) => void>;
+type T07<T extends any[]> = Parameters<(...args: T) => void>;
+type T08<T extends any[]> = Parameters<new (...args: T) => void>;
+type T09 = Parameters<Function>;
+
+type Record1 = {
+  move: [number, 'left' | 'right'];
+  jump: [number, 'up' | 'down'];
+  stop: string;
+  done: [];
+}
+
+type EventType<T> = {
+  emit<K extends keyof T = keyof T>(e: K, ...payload: T[K] extends any[] ? T[K] : [T[K]]): void; 
+}
+
+declare var events: EventType<Record1>;
+events.emit('move', 10, 'left');
+events.emit('jump', 20, 'up');
+events.emit('stop', 'Bye!');
+events.emit('done');
+
+
+//// [genericRestParameters1.js]
+"use strict";
+f1 = f2;
+f2 = f1;
+f1(42, "hello", true);
+f1(t3[0], t3[1], t3[2]);
+f1.apply(void 0, t3);
+f1.apply(void 0, [42].concat(t2));
+f1.apply(void 0, [42, "hello"].concat(t1));
+f1.apply(void 0, [42, "hello", true].concat(t0));
+f1(ns[0], ns[1], true);
+f1.apply(void 0, ns.concat([true])); // Error, tuple spread only expanded when last
+f2(42, "hello", true);
+f2(t3[0], t3[1], t3[2]);
+f2.apply(void 0, t3);
+f2.apply(void 0, [42].concat(t2));
+f2.apply(void 0, [42, "hello"].concat(t1));
+f2.apply(void 0, [42, "hello", true].concat(t0));
+f2(ns[0], ns[1], true);
+f2.apply(void 0, ns.concat([true])); // Error, tuple spread only expanded when last
+var x10 = f10(42, "hello", true); // [number, string, boolean]
+var x11 = f10(42, "hello"); // [number, string]
+var x12 = f10(42); // [number]
+var x13 = f10(); // []
+var x14 = f10.apply(void 0, t3); // [number, string, boolean]
+var x15 = f10.apply(void 0, [42].concat(t2)); // [number, string, boolean]
+var x16 = f10.apply(void 0, [42, "hello"].concat(t1)); // [number, string, boolean]
+var x17 = f10.apply(void 0, [42, "hello", true].concat(t0)); // [number, string, boolean]
+var x18 = f10.apply(void 0, ns.concat([true])); // (string | number | boolean)[]
+function g10(u, v) {
+    var x1 = f10.apply(void 0, u); // U
+    var x2 = f10.apply(void 0, v); // V
+    var x3 = f10.apply(void 0, [1].concat(u)); // (string | number)[]
+    var x4 = f10.apply(void 0, u.concat(v)); // (string | number)[]
+}
+var z10 = f11(42, "hello", true); // [42, "hello", true]
+var z11 = f11(42, "hello"); // [42, "hello"]
+var z12 = f11(42); // [42]
+var z13 = f11(); // []
+var z14 = f11.apply(void 0, t3); // [number, string, boolean]
+var z15 = f11.apply(void 0, [42].concat(t2)); // [42, string, boolean]
+var z16 = f11.apply(void 0, [42, "hello"].concat(t1)); // [42, "hello", boolean]
+var z17 = f11.apply(void 0, [42, "hello", true].concat(t0)); // [42, "hello", true]
+var z18 = f11.apply(void 0, ns.concat([true])); // (string | number | true)[]
+function g11(u, v) {
+    var x1 = f11.apply(void 0, u); // U
+    var x2 = f11.apply(void 0, v); // V
+    var x3 = f11.apply(void 0, [1].concat(u)); // (string | 1)[]
+    var x4 = f11.apply(void 0, u.concat(v)); // (string | number)[]
+}
+function call(f) {
+    var args = [];
+    for (var _i = 1; _i < arguments.length; _i++) {
+        args[_i - 1] = arguments[_i];
+    }
+    return f.apply(void 0, args);
+}
+function callr(args, f) {
+    return f.apply(void 0, args);
+}
+var x20 = call(function (x, y) { return x + y; }, 10, 20); // number
+var x21 = call(function (x, y) { return x + y; }, 10, "hello"); // string
+var x22 = call(f15, "hello", 42); // string | number
+var x23 = call(f16, "hello", 42); // unknown
+var x24 = call(f16, "hello", 42); // string | number
+var x30 = callr(sn, function (x, y) { return x + y; }); // string
+var x31 = callr(sn, f15); // string | number
+var x32 = callr(sn, f16); // string | number
+function bind(f, x) {
+    return function () {
+        var rest = [];
+        for (var _i = 0; _i < arguments.length; _i++) {
+            rest[_i] = arguments[_i];
+        }
+        return f.apply(void 0, [x].concat(rest));
+    };
+}
+var f21 = bind(f20, 42); // (y: string, z: boolean) => string[]
+var f22 = bind(f21, "hello"); // (z: boolean) => string[]
+var f23 = bind(f22, true); // () => string[]
+f20(42, "hello", true);
+f21("hello", true);
+f22(true);
+f23();
+var g21 = bind(g20, 42); // (y: string, z: boolean) => string[]
+var g22 = bind(g21, "hello"); // (z: boolean) => string[]
+var g23 = bind(g22, true); // () => string[]
+g20(42, "hello", true);
+g20(42, "hello");
+g20(42);
+g21("hello", true);
+g21("hello");
+g21();
+g22(true);
+g22();
+g23();
+var c30 = f30(42, function (x) { return "" + x; }, function (x) { return x + 1; }); // [(x: number) => string, (x: number) => number]
+events.emit('move', 10, 'left');
+events.emit('jump', 20, 'up');
+events.emit('stop', 'Bye!');
+events.emit('done');
+
+
+//// [genericRestParameters1.d.ts]
+declare let f1: (...x: [number, string, boolean]) => void;
+declare let f2: (x0: number, x1: string, x2: boolean) => void;
+declare const t3: [number, string, boolean];
+declare const t2: [string, boolean];
+declare const t1: [boolean];
+declare const t0: [];
+declare const ns: [number, string];
+declare const sn: [string, number];
+declare function f10<T extends unknown[]>(...args: T): T;
+declare const x10: [number, string, boolean];
+declare const x11: [number, string];
+declare const x12: [number];
+declare const x13: [];
+declare const x14: [number, string, boolean];
+declare const x15: [number, string, boolean];
+declare const x16: [number, string, boolean];
+declare const x17: [number, string, boolean];
+declare const x18: (string | number | boolean)[];
+declare function g10<U extends string[], V extends [number, number]>(u: U, v: V): void;
+declare function f11<T extends (string | number | boolean)[]>(...args: T): T;
+declare const z10: [42, "hello", true];
+declare const z11: [42, "hello"];
+declare const z12: [42];
+declare const z13: [];
+declare const z14: [number, string, boolean];
+declare const z15: [42, string, boolean];
+declare const z16: [42, "hello", boolean];
+declare const z17: [42, "hello", true];
+declare const z18: (string | number | true)[];
+declare function g11<U extends string[], V extends [number, number]>(u: U, v: V): void;
+declare function call<T extends unknown[], U>(f: (...args: T) => U, ...args: T): U;
+declare function callr<T extends unknown[], U>(args: T, f: (...args: T) => U): U;
+declare function f15(a: string, b: number): string | number;
+declare function f16<A, B>(a: A, b: B): A | B;
+declare let x20: number;
+declare let x21: string;
+declare let x22: string | number;
+declare let x23: unknown;
+declare let x24: string | number;
+declare let x30: string;
+declare let x31: string | number;
+declare let x32: string | number;
+declare function bind<T, U extends unknown[], V>(f: (x: T, ...rest: U) => V, x: T): (...rest: U) => V;
+declare const f20: (x: number, y: string, z: boolean) => string[];
+declare const f21: (y: string, z: boolean) => string[];
+declare const f22: (z: boolean) => string[];
+declare const f23: () => string[];
+declare const g20: (x: number, y?: string, z?: boolean) => string[];
+declare const g21: (y?: string | undefined, z?: boolean | undefined) => string[];
+declare const g22: (z?: boolean | undefined) => string[];
+declare const g23: () => string[];
+declare function f30<T, U extends ((x: T) => any)[]>(x: T, ...args: U): U;
+declare const c30: [(x: number) => string, (x: number) => number];
+declare type Parameters<T extends Function> = T extends ((...args: infer U) => any) | (new (...args: infer U) => any) ? U : any[];
+declare type T01 = Parameters<(x: number, y: string, z: boolean) => void>;
+declare type T02 = Parameters<(...args: [number, string, boolean]) => void>;
+declare type T03 = Parameters<new (x: number, y: string, z: boolean) => void>;
+declare type T04 = Parameters<new (...args: [number, string, boolean]) => void>;
+declare type T05<T> = Parameters<(...args: T[]) => void>;
+declare type T06<T> = Parameters<new (...args: []) => void>;
+declare type T07<T extends any[]> = Parameters<(...args: T) => void>;
+declare type T08<T extends any[]> = Parameters<new (...args: T) => void>;
+declare type T09 = Parameters<Function>;
+declare type Record1 = {
+    move: [number, 'left' | 'right'];
+    jump: [number, 'up' | 'down'];
+    stop: string;
+    done: [];
+};
+declare type EventType<T> = {
+    emit<K extends keyof T = keyof T>(e: K, ...payload: T[K] extends any[] ? T[K] : [T[K]]): void;
+};
+declare var events: EventType<Record1>;
diff --git a/tests/baselines/reference/genericRestParameters1.symbols b/tests/baselines/reference/genericRestParameters1.symbols
new file mode 100644
index 0000000000000..dc37a2115430c
--- /dev/null
+++ b/tests/baselines/reference/genericRestParameters1.symbols
@@ -0,0 +1,624 @@
+=== tests/cases/conformance/types/rest/genericRestParameters1.ts ===
+declare let f1: (...x: [number, string, boolean]) => void;
+>f1 : Symbol(f1, Decl(genericRestParameters1.ts, 0, 11))
+>x : Symbol(x, Decl(genericRestParameters1.ts, 0, 17))
+
+declare let f2: (x0: number, x1: string, x2: boolean) => void;
+>f2 : Symbol(f2, Decl(genericRestParameters1.ts, 1, 11))
+>x0 : Symbol(x0, Decl(genericRestParameters1.ts, 1, 17))
+>x1 : Symbol(x1, Decl(genericRestParameters1.ts, 1, 28))
+>x2 : Symbol(x2, Decl(genericRestParameters1.ts, 1, 40))
+
+f1 = f2;
+>f1 : Symbol(f1, Decl(genericRestParameters1.ts, 0, 11))
+>f2 : Symbol(f2, Decl(genericRestParameters1.ts, 1, 11))
+
+f2 = f1;
+>f2 : Symbol(f2, Decl(genericRestParameters1.ts, 1, 11))
+>f1 : Symbol(f1, Decl(genericRestParameters1.ts, 0, 11))
+
+declare const t3: [number, string, boolean];
+>t3 : Symbol(t3, Decl(genericRestParameters1.ts, 6, 13))
+
+declare const t2: [string, boolean];
+>t2 : Symbol(t2, Decl(genericRestParameters1.ts, 7, 13))
+
+declare const t1: [boolean];
+>t1 : Symbol(t1, Decl(genericRestParameters1.ts, 8, 13))
+
+declare const t0: [];
+>t0 : Symbol(t0, Decl(genericRestParameters1.ts, 9, 13))
+
+declare const ns: [number, string];
+>ns : Symbol(ns, Decl(genericRestParameters1.ts, 11, 13))
+
+declare const sn: [string, number];
+>sn : Symbol(sn, Decl(genericRestParameters1.ts, 12, 13))
+
+f1(42, "hello", true);
+>f1 : Symbol(f1, Decl(genericRestParameters1.ts, 0, 11))
+
+f1(t3[0], t3[1], t3[2]);
+>f1 : Symbol(f1, Decl(genericRestParameters1.ts, 0, 11))
+>t3 : Symbol(t3, Decl(genericRestParameters1.ts, 6, 13))
+>0 : Symbol(0)
+>t3 : Symbol(t3, Decl(genericRestParameters1.ts, 6, 13))
+>1 : Symbol(1)
+>t3 : Symbol(t3, Decl(genericRestParameters1.ts, 6, 13))
+>2 : Symbol(2)
+
+f1(...t3);
+>f1 : Symbol(f1, Decl(genericRestParameters1.ts, 0, 11))
+>t3 : Symbol(t3, Decl(genericRestParameters1.ts, 6, 13))
+
+f1(42, ...t2);
+>f1 : Symbol(f1, Decl(genericRestParameters1.ts, 0, 11))
+>t2 : Symbol(t2, Decl(genericRestParameters1.ts, 7, 13))
+
+f1(42, "hello", ...t1);
+>f1 : Symbol(f1, Decl(genericRestParameters1.ts, 0, 11))
+>t1 : Symbol(t1, Decl(genericRestParameters1.ts, 8, 13))
+
+f1(42, "hello", true, ...t0);
+>f1 : Symbol(f1, Decl(genericRestParameters1.ts, 0, 11))
+>t0 : Symbol(t0, Decl(genericRestParameters1.ts, 9, 13))
+
+f1(ns[0], ns[1], true);
+>f1 : Symbol(f1, Decl(genericRestParameters1.ts, 0, 11))
+>ns : Symbol(ns, Decl(genericRestParameters1.ts, 11, 13))
+>0 : Symbol(0)
+>ns : Symbol(ns, Decl(genericRestParameters1.ts, 11, 13))
+>1 : Symbol(1)
+
+f1(...ns, true);  // Error, tuple spread only expanded when last
+>f1 : Symbol(f1, Decl(genericRestParameters1.ts, 0, 11))
+>ns : Symbol(ns, Decl(genericRestParameters1.ts, 11, 13))
+
+f2(42, "hello", true);
+>f2 : Symbol(f2, Decl(genericRestParameters1.ts, 1, 11))
+
+f2(t3[0], t3[1], t3[2]);
+>f2 : Symbol(f2, Decl(genericRestParameters1.ts, 1, 11))
+>t3 : Symbol(t3, Decl(genericRestParameters1.ts, 6, 13))
+>0 : Symbol(0)
+>t3 : Symbol(t3, Decl(genericRestParameters1.ts, 6, 13))
+>1 : Symbol(1)
+>t3 : Symbol(t3, Decl(genericRestParameters1.ts, 6, 13))
+>2 : Symbol(2)
+
+f2(...t3);
+>f2 : Symbol(f2, Decl(genericRestParameters1.ts, 1, 11))
+>t3 : Symbol(t3, Decl(genericRestParameters1.ts, 6, 13))
+
+f2(42, ...t2);
+>f2 : Symbol(f2, Decl(genericRestParameters1.ts, 1, 11))
+>t2 : Symbol(t2, Decl(genericRestParameters1.ts, 7, 13))
+
+f2(42, "hello", ...t1);
+>f2 : Symbol(f2, Decl(genericRestParameters1.ts, 1, 11))
+>t1 : Symbol(t1, Decl(genericRestParameters1.ts, 8, 13))
+
+f2(42, "hello", true, ...t0);
+>f2 : Symbol(f2, Decl(genericRestParameters1.ts, 1, 11))
+>t0 : Symbol(t0, Decl(genericRestParameters1.ts, 9, 13))
+
+f2(ns[0], ns[1], true);
+>f2 : Symbol(f2, Decl(genericRestParameters1.ts, 1, 11))
+>ns : Symbol(ns, Decl(genericRestParameters1.ts, 11, 13))
+>0 : Symbol(0)
+>ns : Symbol(ns, Decl(genericRestParameters1.ts, 11, 13))
+>1 : Symbol(1)
+
+f2(...ns, true);  // Error, tuple spread only expanded when last
+>f2 : Symbol(f2, Decl(genericRestParameters1.ts, 1, 11))
+>ns : Symbol(ns, Decl(genericRestParameters1.ts, 11, 13))
+
+declare function f10<T extends unknown[]>(...args: T): T;
+>f10 : Symbol(f10, Decl(genericRestParameters1.ts, 30, 16))
+>T : Symbol(T, Decl(genericRestParameters1.ts, 32, 21))
+>args : Symbol(args, Decl(genericRestParameters1.ts, 32, 42))
+>T : Symbol(T, Decl(genericRestParameters1.ts, 32, 21))
+>T : Symbol(T, Decl(genericRestParameters1.ts, 32, 21))
+
+const x10 = f10(42, "hello", true);  // [number, string, boolean]
+>x10 : Symbol(x10, Decl(genericRestParameters1.ts, 34, 5))
+>f10 : Symbol(f10, Decl(genericRestParameters1.ts, 30, 16))
+
+const x11 = f10(42, "hello");  // [number, string]
+>x11 : Symbol(x11, Decl(genericRestParameters1.ts, 35, 5))
+>f10 : Symbol(f10, Decl(genericRestParameters1.ts, 30, 16))
+
+const x12 = f10(42);  // [number]
+>x12 : Symbol(x12, Decl(genericRestParameters1.ts, 36, 5))
+>f10 : Symbol(f10, Decl(genericRestParameters1.ts, 30, 16))
+
+const x13 = f10();  // []
+>x13 : Symbol(x13, Decl(genericRestParameters1.ts, 37, 5))
+>f10 : Symbol(f10, Decl(genericRestParameters1.ts, 30, 16))
+
+const x14 = f10(...t3);  // [number, string, boolean]
+>x14 : Symbol(x14, Decl(genericRestParameters1.ts, 38, 5))
+>f10 : Symbol(f10, Decl(genericRestParameters1.ts, 30, 16))
+>t3 : Symbol(t3, Decl(genericRestParameters1.ts, 6, 13))
+
+const x15 = f10(42, ...t2);  // [number, string, boolean]
+>x15 : Symbol(x15, Decl(genericRestParameters1.ts, 39, 5))
+>f10 : Symbol(f10, Decl(genericRestParameters1.ts, 30, 16))
+>t2 : Symbol(t2, Decl(genericRestParameters1.ts, 7, 13))
+
+const x16 = f10(42, "hello", ...t1);  // [number, string, boolean]
+>x16 : Symbol(x16, Decl(genericRestParameters1.ts, 40, 5))
+>f10 : Symbol(f10, Decl(genericRestParameters1.ts, 30, 16))
+>t1 : Symbol(t1, Decl(genericRestParameters1.ts, 8, 13))
+
+const x17 = f10(42, "hello", true, ...t0);  // [number, string, boolean]
+>x17 : Symbol(x17, Decl(genericRestParameters1.ts, 41, 5))
+>f10 : Symbol(f10, Decl(genericRestParameters1.ts, 30, 16))
+>t0 : Symbol(t0, Decl(genericRestParameters1.ts, 9, 13))
+
+const x18 = f10(...ns, true);  // (string | number | boolean)[]
+>x18 : Symbol(x18, Decl(genericRestParameters1.ts, 42, 5))
+>f10 : Symbol(f10, Decl(genericRestParameters1.ts, 30, 16))
+>ns : Symbol(ns, Decl(genericRestParameters1.ts, 11, 13))
+
+function g10<U extends string[], V extends [number, number]>(u: U, v: V) {
+>g10 : Symbol(g10, Decl(genericRestParameters1.ts, 42, 29))
+>U : Symbol(U, Decl(genericRestParameters1.ts, 44, 13))
+>V : Symbol(V, Decl(genericRestParameters1.ts, 44, 32))
+>u : Symbol(u, Decl(genericRestParameters1.ts, 44, 61))
+>U : Symbol(U, Decl(genericRestParameters1.ts, 44, 13))
+>v : Symbol(v, Decl(genericRestParameters1.ts, 44, 66))
+>V : Symbol(V, Decl(genericRestParameters1.ts, 44, 32))
+
+    let x1 = f10(...u);  // U
+>x1 : Symbol(x1, Decl(genericRestParameters1.ts, 45, 7))
+>f10 : Symbol(f10, Decl(genericRestParameters1.ts, 30, 16))
+>u : Symbol(u, Decl(genericRestParameters1.ts, 44, 61))
+
+    let x2 = f10(...v);  // V
+>x2 : Symbol(x2, Decl(genericRestParameters1.ts, 46, 7))
+>f10 : Symbol(f10, Decl(genericRestParameters1.ts, 30, 16))
+>v : Symbol(v, Decl(genericRestParameters1.ts, 44, 66))
+
+    let x3 = f10(1, ...u);  // (string | number)[]
+>x3 : Symbol(x3, Decl(genericRestParameters1.ts, 47, 7))
+>f10 : Symbol(f10, Decl(genericRestParameters1.ts, 30, 16))
+>u : Symbol(u, Decl(genericRestParameters1.ts, 44, 61))
+
+    let x4 = f10(...u, ...v);  // (string | number)[]
+>x4 : Symbol(x4, Decl(genericRestParameters1.ts, 48, 7))
+>f10 : Symbol(f10, Decl(genericRestParameters1.ts, 30, 16))
+>u : Symbol(u, Decl(genericRestParameters1.ts, 44, 61))
+>v : Symbol(v, Decl(genericRestParameters1.ts, 44, 66))
+}
+
+declare function f11<T extends (string | number | boolean)[]>(...args: T): T;
+>f11 : Symbol(f11, Decl(genericRestParameters1.ts, 49, 1))
+>T : Symbol(T, Decl(genericRestParameters1.ts, 51, 21))
+>args : Symbol(args, Decl(genericRestParameters1.ts, 51, 62))
+>T : Symbol(T, Decl(genericRestParameters1.ts, 51, 21))
+>T : Symbol(T, Decl(genericRestParameters1.ts, 51, 21))
+
+const z10 = f11(42, "hello", true);  // [42, "hello", true]
+>z10 : Symbol(z10, Decl(genericRestParameters1.ts, 53, 5))
+>f11 : Symbol(f11, Decl(genericRestParameters1.ts, 49, 1))
+
+const z11 = f11(42, "hello");  // [42, "hello"]
+>z11 : Symbol(z11, Decl(genericRestParameters1.ts, 54, 5))
+>f11 : Symbol(f11, Decl(genericRestParameters1.ts, 49, 1))
+
+const z12 = f11(42);  // [42]
+>z12 : Symbol(z12, Decl(genericRestParameters1.ts, 55, 5))
+>f11 : Symbol(f11, Decl(genericRestParameters1.ts, 49, 1))
+
+const z13 = f11();  // []
+>z13 : Symbol(z13, Decl(genericRestParameters1.ts, 56, 5))
+>f11 : Symbol(f11, Decl(genericRestParameters1.ts, 49, 1))
+
+const z14 = f11(...t3);  // [number, string, boolean]
+>z14 : Symbol(z14, Decl(genericRestParameters1.ts, 57, 5))
+>f11 : Symbol(f11, Decl(genericRestParameters1.ts, 49, 1))
+>t3 : Symbol(t3, Decl(genericRestParameters1.ts, 6, 13))
+
+const z15 = f11(42, ...t2);  // [42, string, boolean]
+>z15 : Symbol(z15, Decl(genericRestParameters1.ts, 58, 5))
+>f11 : Symbol(f11, Decl(genericRestParameters1.ts, 49, 1))
+>t2 : Symbol(t2, Decl(genericRestParameters1.ts, 7, 13))
+
+const z16 = f11(42, "hello", ...t1);  // [42, "hello", boolean]
+>z16 : Symbol(z16, Decl(genericRestParameters1.ts, 59, 5))
+>f11 : Symbol(f11, Decl(genericRestParameters1.ts, 49, 1))
+>t1 : Symbol(t1, Decl(genericRestParameters1.ts, 8, 13))
+
+const z17 = f11(42, "hello", true, ...t0);  // [42, "hello", true]
+>z17 : Symbol(z17, Decl(genericRestParameters1.ts, 60, 5))
+>f11 : Symbol(f11, Decl(genericRestParameters1.ts, 49, 1))
+>t0 : Symbol(t0, Decl(genericRestParameters1.ts, 9, 13))
+
+const z18 = f11(...ns, true);  // (string | number | true)[]
+>z18 : Symbol(z18, Decl(genericRestParameters1.ts, 61, 5))
+>f11 : Symbol(f11, Decl(genericRestParameters1.ts, 49, 1))
+>ns : Symbol(ns, Decl(genericRestParameters1.ts, 11, 13))
+
+function g11<U extends string[], V extends [number, number]>(u: U, v: V) {
+>g11 : Symbol(g11, Decl(genericRestParameters1.ts, 61, 29))
+>U : Symbol(U, Decl(genericRestParameters1.ts, 63, 13))
+>V : Symbol(V, Decl(genericRestParameters1.ts, 63, 32))
+>u : Symbol(u, Decl(genericRestParameters1.ts, 63, 61))
+>U : Symbol(U, Decl(genericRestParameters1.ts, 63, 13))
+>v : Symbol(v, Decl(genericRestParameters1.ts, 63, 66))
+>V : Symbol(V, Decl(genericRestParameters1.ts, 63, 32))
+
+    let x1 = f11(...u);  // U
+>x1 : Symbol(x1, Decl(genericRestParameters1.ts, 64, 7))
+>f11 : Symbol(f11, Decl(genericRestParameters1.ts, 49, 1))
+>u : Symbol(u, Decl(genericRestParameters1.ts, 63, 61))
+
+    let x2 = f11(...v);  // V
+>x2 : Symbol(x2, Decl(genericRestParameters1.ts, 65, 7))
+>f11 : Symbol(f11, Decl(genericRestParameters1.ts, 49, 1))
+>v : Symbol(v, Decl(genericRestParameters1.ts, 63, 66))
+
+    let x3 = f11(1, ...u);  // (string | 1)[]
+>x3 : Symbol(x3, Decl(genericRestParameters1.ts, 66, 7))
+>f11 : Symbol(f11, Decl(genericRestParameters1.ts, 49, 1))
+>u : Symbol(u, Decl(genericRestParameters1.ts, 63, 61))
+
+    let x4 = f11(...u, ...v);  // (string | number)[]
+>x4 : Symbol(x4, Decl(genericRestParameters1.ts, 67, 7))
+>f11 : Symbol(f11, Decl(genericRestParameters1.ts, 49, 1))
+>u : Symbol(u, Decl(genericRestParameters1.ts, 63, 61))
+>v : Symbol(v, Decl(genericRestParameters1.ts, 63, 66))
+}
+
+function call<T extends unknown[], U>(f: (...args: T) => U, ...args: T) {
+>call : Symbol(call, Decl(genericRestParameters1.ts, 68, 1))
+>T : Symbol(T, Decl(genericRestParameters1.ts, 70, 14))
+>U : Symbol(U, Decl(genericRestParameters1.ts, 70, 34))
+>f : Symbol(f, Decl(genericRestParameters1.ts, 70, 38))
+>args : Symbol(args, Decl(genericRestParameters1.ts, 70, 42))
+>T : Symbol(T, Decl(genericRestParameters1.ts, 70, 14))
+>U : Symbol(U, Decl(genericRestParameters1.ts, 70, 34))
+>args : Symbol(args, Decl(genericRestParameters1.ts, 70, 59))
+>T : Symbol(T, Decl(genericRestParameters1.ts, 70, 14))
+
+    return f(...args);
+>f : Symbol(f, Decl(genericRestParameters1.ts, 70, 38))
+>args : Symbol(args, Decl(genericRestParameters1.ts, 70, 59))
+}
+
+function callr<T extends unknown[], U>(args: T, f: (...args: T) => U) {
+>callr : Symbol(callr, Decl(genericRestParameters1.ts, 72, 1))
+>T : Symbol(T, Decl(genericRestParameters1.ts, 74, 15))
+>U : Symbol(U, Decl(genericRestParameters1.ts, 74, 35))
+>args : Symbol(args, Decl(genericRestParameters1.ts, 74, 39))
+>T : Symbol(T, Decl(genericRestParameters1.ts, 74, 15))
+>f : Symbol(f, Decl(genericRestParameters1.ts, 74, 47))
+>args : Symbol(args, Decl(genericRestParameters1.ts, 74, 52))
+>T : Symbol(T, Decl(genericRestParameters1.ts, 74, 15))
+>U : Symbol(U, Decl(genericRestParameters1.ts, 74, 35))
+
+    return f(...args);
+>f : Symbol(f, Decl(genericRestParameters1.ts, 74, 47))
+>args : Symbol(args, Decl(genericRestParameters1.ts, 74, 39))
+}
+
+declare function f15(a: string, b: number): string | number;
+>f15 : Symbol(f15, Decl(genericRestParameters1.ts, 76, 1))
+>a : Symbol(a, Decl(genericRestParameters1.ts, 78, 21))
+>b : Symbol(b, Decl(genericRestParameters1.ts, 78, 31))
+
+declare function f16<A, B>(a: A, b: B): A | B;
+>f16 : Symbol(f16, Decl(genericRestParameters1.ts, 78, 60))
+>A : Symbol(A, Decl(genericRestParameters1.ts, 79, 21))
+>B : Symbol(B, Decl(genericRestParameters1.ts, 79, 23))
+>a : Symbol(a, Decl(genericRestParameters1.ts, 79, 27))
+>A : Symbol(A, Decl(genericRestParameters1.ts, 79, 21))
+>b : Symbol(b, Decl(genericRestParameters1.ts, 79, 32))
+>B : Symbol(B, Decl(genericRestParameters1.ts, 79, 23))
+>A : Symbol(A, Decl(genericRestParameters1.ts, 79, 21))
+>B : Symbol(B, Decl(genericRestParameters1.ts, 79, 23))
+
+let x20 = call((x, y) => x + y, 10, 20);  // number
+>x20 : Symbol(x20, Decl(genericRestParameters1.ts, 81, 3))
+>call : Symbol(call, Decl(genericRestParameters1.ts, 68, 1))
+>x : Symbol(x, Decl(genericRestParameters1.ts, 81, 16))
+>y : Symbol(y, Decl(genericRestParameters1.ts, 81, 18))
+>x : Symbol(x, Decl(genericRestParameters1.ts, 81, 16))
+>y : Symbol(y, Decl(genericRestParameters1.ts, 81, 18))
+
+let x21 = call((x, y) => x + y, 10, "hello");  // string
+>x21 : Symbol(x21, Decl(genericRestParameters1.ts, 82, 3))
+>call : Symbol(call, Decl(genericRestParameters1.ts, 68, 1))
+>x : Symbol(x, Decl(genericRestParameters1.ts, 82, 16))
+>y : Symbol(y, Decl(genericRestParameters1.ts, 82, 18))
+>x : Symbol(x, Decl(genericRestParameters1.ts, 82, 16))
+>y : Symbol(y, Decl(genericRestParameters1.ts, 82, 18))
+
+let x22 = call(f15, "hello", 42);  // string | number
+>x22 : Symbol(x22, Decl(genericRestParameters1.ts, 83, 3))
+>call : Symbol(call, Decl(genericRestParameters1.ts, 68, 1))
+>f15 : Symbol(f15, Decl(genericRestParameters1.ts, 76, 1))
+
+let x23 = call(f16, "hello", 42);  // unknown
+>x23 : Symbol(x23, Decl(genericRestParameters1.ts, 84, 3))
+>call : Symbol(call, Decl(genericRestParameters1.ts, 68, 1))
+>f16 : Symbol(f16, Decl(genericRestParameters1.ts, 78, 60))
+
+let x24 = call<[string, number], string | number>(f16, "hello", 42);  // string | number
+>x24 : Symbol(x24, Decl(genericRestParameters1.ts, 85, 3))
+>call : Symbol(call, Decl(genericRestParameters1.ts, 68, 1))
+>f16 : Symbol(f16, Decl(genericRestParameters1.ts, 78, 60))
+
+let x30 = callr(sn, (x, y) => x + y);  // string
+>x30 : Symbol(x30, Decl(genericRestParameters1.ts, 87, 3))
+>callr : Symbol(callr, Decl(genericRestParameters1.ts, 72, 1))
+>sn : Symbol(sn, Decl(genericRestParameters1.ts, 12, 13))
+>x : Symbol(x, Decl(genericRestParameters1.ts, 87, 21))
+>y : Symbol(y, Decl(genericRestParameters1.ts, 87, 23))
+>x : Symbol(x, Decl(genericRestParameters1.ts, 87, 21))
+>y : Symbol(y, Decl(genericRestParameters1.ts, 87, 23))
+
+let x31 = callr(sn, f15);  // string | number
+>x31 : Symbol(x31, Decl(genericRestParameters1.ts, 88, 3))
+>callr : Symbol(callr, Decl(genericRestParameters1.ts, 72, 1))
+>sn : Symbol(sn, Decl(genericRestParameters1.ts, 12, 13))
+>f15 : Symbol(f15, Decl(genericRestParameters1.ts, 76, 1))
+
+let x32 = callr(sn, f16);  // string | number
+>x32 : Symbol(x32, Decl(genericRestParameters1.ts, 89, 3))
+>callr : Symbol(callr, Decl(genericRestParameters1.ts, 72, 1))
+>sn : Symbol(sn, Decl(genericRestParameters1.ts, 12, 13))
+>f16 : Symbol(f16, Decl(genericRestParameters1.ts, 78, 60))
+
+function bind<T, U extends unknown[], V>(f: (x: T, ...rest: U) => V, x: T) {
+>bind : Symbol(bind, Decl(genericRestParameters1.ts, 89, 25))
+>T : Symbol(T, Decl(genericRestParameters1.ts, 91, 14))
+>U : Symbol(U, Decl(genericRestParameters1.ts, 91, 16))
+>V : Symbol(V, Decl(genericRestParameters1.ts, 91, 37))
+>f : Symbol(f, Decl(genericRestParameters1.ts, 91, 41))
+>x : Symbol(x, Decl(genericRestParameters1.ts, 91, 45))
+>T : Symbol(T, Decl(genericRestParameters1.ts, 91, 14))
+>rest : Symbol(rest, Decl(genericRestParameters1.ts, 91, 50))
+>U : Symbol(U, Decl(genericRestParameters1.ts, 91, 16))
+>V : Symbol(V, Decl(genericRestParameters1.ts, 91, 37))
+>x : Symbol(x, Decl(genericRestParameters1.ts, 91, 68))
+>T : Symbol(T, Decl(genericRestParameters1.ts, 91, 14))
+
+    return (...rest: U) => f(x, ...rest);
+>rest : Symbol(rest, Decl(genericRestParameters1.ts, 92, 12))
+>U : Symbol(U, Decl(genericRestParameters1.ts, 91, 16))
+>f : Symbol(f, Decl(genericRestParameters1.ts, 91, 41))
+>x : Symbol(x, Decl(genericRestParameters1.ts, 91, 68))
+>rest : Symbol(rest, Decl(genericRestParameters1.ts, 92, 12))
+}
+
+declare const f20: (x: number, y: string, z: boolean) => string[];
+>f20 : Symbol(f20, Decl(genericRestParameters1.ts, 95, 13))
+>x : Symbol(x, Decl(genericRestParameters1.ts, 95, 20))
+>y : Symbol(y, Decl(genericRestParameters1.ts, 95, 30))
+>z : Symbol(z, Decl(genericRestParameters1.ts, 95, 41))
+
+const f21 = bind(f20, 42);  // (y: string, z: boolean) => string[]
+>f21 : Symbol(f21, Decl(genericRestParameters1.ts, 97, 5))
+>bind : Symbol(bind, Decl(genericRestParameters1.ts, 89, 25))
+>f20 : Symbol(f20, Decl(genericRestParameters1.ts, 95, 13))
+
+const f22 = bind(f21, "hello");  // (z: boolean) => string[]
+>f22 : Symbol(f22, Decl(genericRestParameters1.ts, 98, 5))
+>bind : Symbol(bind, Decl(genericRestParameters1.ts, 89, 25))
+>f21 : Symbol(f21, Decl(genericRestParameters1.ts, 97, 5))
+
+const f23 = bind(f22, true);  // () => string[]
+>f23 : Symbol(f23, Decl(genericRestParameters1.ts, 99, 5))
+>bind : Symbol(bind, Decl(genericRestParameters1.ts, 89, 25))
+>f22 : Symbol(f22, Decl(genericRestParameters1.ts, 98, 5))
+
+f20(42, "hello", true);
+>f20 : Symbol(f20, Decl(genericRestParameters1.ts, 95, 13))
+
+f21("hello", true);
+>f21 : Symbol(f21, Decl(genericRestParameters1.ts, 97, 5))
+
+f22(true);
+>f22 : Symbol(f22, Decl(genericRestParameters1.ts, 98, 5))
+
+f23();
+>f23 : Symbol(f23, Decl(genericRestParameters1.ts, 99, 5))
+
+declare const g20: (x: number, y?: string, z?: boolean) => string[];
+>g20 : Symbol(g20, Decl(genericRestParameters1.ts, 106, 13))
+>x : Symbol(x, Decl(genericRestParameters1.ts, 106, 20))
+>y : Symbol(y, Decl(genericRestParameters1.ts, 106, 30))
+>z : Symbol(z, Decl(genericRestParameters1.ts, 106, 42))
+
+const g21 = bind(g20, 42);  // (y: string, z: boolean) => string[]
+>g21 : Symbol(g21, Decl(genericRestParameters1.ts, 108, 5))
+>bind : Symbol(bind, Decl(genericRestParameters1.ts, 89, 25))
+>g20 : Symbol(g20, Decl(genericRestParameters1.ts, 106, 13))
+
+const g22 = bind(g21, "hello");  // (z: boolean) => string[]
+>g22 : Symbol(g22, Decl(genericRestParameters1.ts, 109, 5))
+>bind : Symbol(bind, Decl(genericRestParameters1.ts, 89, 25))
+>g21 : Symbol(g21, Decl(genericRestParameters1.ts, 108, 5))
+
+const g23 = bind(g22, true);  // () => string[]
+>g23 : Symbol(g23, Decl(genericRestParameters1.ts, 110, 5))
+>bind : Symbol(bind, Decl(genericRestParameters1.ts, 89, 25))
+>g22 : Symbol(g22, Decl(genericRestParameters1.ts, 109, 5))
+
+g20(42, "hello", true);
+>g20 : Symbol(g20, Decl(genericRestParameters1.ts, 106, 13))
+
+g20(42, "hello");
+>g20 : Symbol(g20, Decl(genericRestParameters1.ts, 106, 13))
+
+g20(42);
+>g20 : Symbol(g20, Decl(genericRestParameters1.ts, 106, 13))
+
+g21("hello", true);
+>g21 : Symbol(g21, Decl(genericRestParameters1.ts, 108, 5))
+
+g21("hello");
+>g21 : Symbol(g21, Decl(genericRestParameters1.ts, 108, 5))
+
+g21();
+>g21 : Symbol(g21, Decl(genericRestParameters1.ts, 108, 5))
+
+g22(true);
+>g22 : Symbol(g22, Decl(genericRestParameters1.ts, 109, 5))
+
+g22();
+>g22 : Symbol(g22, Decl(genericRestParameters1.ts, 109, 5))
+
+g23();
+>g23 : Symbol(g23, Decl(genericRestParameters1.ts, 110, 5))
+
+declare function f30<T, U extends ((x: T) => any)[]>(x: T, ...args: U): U;
+>f30 : Symbol(f30, Decl(genericRestParameters1.ts, 120, 6))
+>T : Symbol(T, Decl(genericRestParameters1.ts, 122, 21))
+>U : Symbol(U, Decl(genericRestParameters1.ts, 122, 23))
+>x : Symbol(x, Decl(genericRestParameters1.ts, 122, 36))
+>T : Symbol(T, Decl(genericRestParameters1.ts, 122, 21))
+>x : Symbol(x, Decl(genericRestParameters1.ts, 122, 53))
+>T : Symbol(T, Decl(genericRestParameters1.ts, 122, 21))
+>args : Symbol(args, Decl(genericRestParameters1.ts, 122, 58))
+>U : Symbol(U, Decl(genericRestParameters1.ts, 122, 23))
+>U : Symbol(U, Decl(genericRestParameters1.ts, 122, 23))
+
+const c30 = f30(42, x => "" + x, x => x + 1);  // [(x: number) => string, (x: number) => number]
+>c30 : Symbol(c30, Decl(genericRestParameters1.ts, 124, 5))
+>f30 : Symbol(f30, Decl(genericRestParameters1.ts, 120, 6))
+>x : Symbol(x, Decl(genericRestParameters1.ts, 124, 19))
+>x : Symbol(x, Decl(genericRestParameters1.ts, 124, 19))
+>x : Symbol(x, Decl(genericRestParameters1.ts, 124, 32))
+>x : Symbol(x, Decl(genericRestParameters1.ts, 124, 32))
+
+type Parameters<T extends Function> = T extends ((...args: infer U) => any) | (new(...args: infer U) => any) ? U : any[];
+>Parameters : Symbol(Parameters, Decl(genericRestParameters1.ts, 124, 45))
+>T : Symbol(T, Decl(genericRestParameters1.ts, 126, 16))
+>Function : Symbol(Function, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --))
+>T : Symbol(T, Decl(genericRestParameters1.ts, 126, 16))
+>args : Symbol(args, Decl(genericRestParameters1.ts, 126, 50))
+>U : Symbol(U, Decl(genericRestParameters1.ts, 126, 64), Decl(genericRestParameters1.ts, 126, 97))
+>args : Symbol(args, Decl(genericRestParameters1.ts, 126, 83))
+>U : Symbol(U, Decl(genericRestParameters1.ts, 126, 64), Decl(genericRestParameters1.ts, 126, 97))
+>U : Symbol(U, Decl(genericRestParameters1.ts, 126, 64), Decl(genericRestParameters1.ts, 126, 97))
+
+type T01 = Parameters<(x: number, y: string, z: boolean) => void>;
+>T01 : Symbol(T01, Decl(genericRestParameters1.ts, 126, 121))
+>Parameters : Symbol(Parameters, Decl(genericRestParameters1.ts, 124, 45))
+>x : Symbol(x, Decl(genericRestParameters1.ts, 128, 23))
+>y : Symbol(y, Decl(genericRestParameters1.ts, 128, 33))
+>z : Symbol(z, Decl(genericRestParameters1.ts, 128, 44))
+
+type T02 = Parameters<(...args: [number, string, boolean]) => void>;
+>T02 : Symbol(T02, Decl(genericRestParameters1.ts, 128, 66))
+>Parameters : Symbol(Parameters, Decl(genericRestParameters1.ts, 124, 45))
+>args : Symbol(args, Decl(genericRestParameters1.ts, 129, 23))
+
+type T03 = Parameters<new (x: number, y: string, z: boolean) => void>;
+>T03 : Symbol(T03, Decl(genericRestParameters1.ts, 129, 68))
+>Parameters : Symbol(Parameters, Decl(genericRestParameters1.ts, 124, 45))
+>x : Symbol(x, Decl(genericRestParameters1.ts, 130, 27))
+>y : Symbol(y, Decl(genericRestParameters1.ts, 130, 37))
+>z : Symbol(z, Decl(genericRestParameters1.ts, 130, 48))
+
+type T04 = Parameters<new (...args: [number, string, boolean]) => void>;
+>T04 : Symbol(T04, Decl(genericRestParameters1.ts, 130, 70))
+>Parameters : Symbol(Parameters, Decl(genericRestParameters1.ts, 124, 45))
+>args : Symbol(args, Decl(genericRestParameters1.ts, 131, 27))
+
+type T05<T> = Parameters<(...args: T[]) => void>;
+>T05 : Symbol(T05, Decl(genericRestParameters1.ts, 131, 72))
+>T : Symbol(T, Decl(genericRestParameters1.ts, 132, 9))
+>Parameters : Symbol(Parameters, Decl(genericRestParameters1.ts, 124, 45))
+>args : Symbol(args, Decl(genericRestParameters1.ts, 132, 26))
+>T : Symbol(T, Decl(genericRestParameters1.ts, 132, 9))
+
+type T06<T> = Parameters<new (...args: []) => void>;
+>T06 : Symbol(T06, Decl(genericRestParameters1.ts, 132, 49))
+>T : Symbol(T, Decl(genericRestParameters1.ts, 133, 9))
+>Parameters : Symbol(Parameters, Decl(genericRestParameters1.ts, 124, 45))
+>args : Symbol(args, Decl(genericRestParameters1.ts, 133, 30))
+
+type T07<T extends any[]> = Parameters<(...args: T) => void>;
+>T07 : Symbol(T07, Decl(genericRestParameters1.ts, 133, 52))
+>T : Symbol(T, Decl(genericRestParameters1.ts, 134, 9))
+>Parameters : Symbol(Parameters, Decl(genericRestParameters1.ts, 124, 45))
+>args : Symbol(args, Decl(genericRestParameters1.ts, 134, 40))
+>T : Symbol(T, Decl(genericRestParameters1.ts, 134, 9))
+
+type T08<T extends any[]> = Parameters<new (...args: T) => void>;
+>T08 : Symbol(T08, Decl(genericRestParameters1.ts, 134, 61))
+>T : Symbol(T, Decl(genericRestParameters1.ts, 135, 9))
+>Parameters : Symbol(Parameters, Decl(genericRestParameters1.ts, 124, 45))
+>args : Symbol(args, Decl(genericRestParameters1.ts, 135, 44))
+>T : Symbol(T, Decl(genericRestParameters1.ts, 135, 9))
+
+type T09 = Parameters<Function>;
+>T09 : Symbol(T09, Decl(genericRestParameters1.ts, 135, 65))
+>Parameters : Symbol(Parameters, Decl(genericRestParameters1.ts, 124, 45))
+>Function : Symbol(Function, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --))
+
+type Record1 = {
+>Record1 : Symbol(Record1, Decl(genericRestParameters1.ts, 136, 32))
+
+  move: [number, 'left' | 'right'];
+>move : Symbol(move, Decl(genericRestParameters1.ts, 138, 16))
+
+  jump: [number, 'up' | 'down'];
+>jump : Symbol(jump, Decl(genericRestParameters1.ts, 139, 35))
+
+  stop: string;
+>stop : Symbol(stop, Decl(genericRestParameters1.ts, 140, 32))
+
+  done: [];
+>done : Symbol(done, Decl(genericRestParameters1.ts, 141, 15))
+}
+
+type EventType<T> = {
+>EventType : Symbol(EventType, Decl(genericRestParameters1.ts, 143, 1))
+>T : Symbol(T, Decl(genericRestParameters1.ts, 145, 15))
+
+  emit<K extends keyof T = keyof T>(e: K, ...payload: T[K] extends any[] ? T[K] : [T[K]]): void; 
+>emit : Symbol(emit, Decl(genericRestParameters1.ts, 145, 21))
+>K : Symbol(K, Decl(genericRestParameters1.ts, 146, 7))
+>T : Symbol(T, Decl(genericRestParameters1.ts, 145, 15))
+>T : Symbol(T, Decl(genericRestParameters1.ts, 145, 15))
+>e : Symbol(e, Decl(genericRestParameters1.ts, 146, 36))
+>K : Symbol(K, Decl(genericRestParameters1.ts, 146, 7))
+>payload : Symbol(payload, Decl(genericRestParameters1.ts, 146, 41))
+>T : Symbol(T, Decl(genericRestParameters1.ts, 145, 15))
+>K : Symbol(K, Decl(genericRestParameters1.ts, 146, 7))
+>T : Symbol(T, Decl(genericRestParameters1.ts, 145, 15))
+>K : Symbol(K, Decl(genericRestParameters1.ts, 146, 7))
+>T : Symbol(T, Decl(genericRestParameters1.ts, 145, 15))
+>K : Symbol(K, Decl(genericRestParameters1.ts, 146, 7))
+}
+
+declare var events: EventType<Record1>;
+>events : Symbol(events, Decl(genericRestParameters1.ts, 149, 11))
+>EventType : Symbol(EventType, Decl(genericRestParameters1.ts, 143, 1))
+>Record1 : Symbol(Record1, Decl(genericRestParameters1.ts, 136, 32))
+
+events.emit('move', 10, 'left');
+>events.emit : Symbol(emit, Decl(genericRestParameters1.ts, 145, 21))
+>events : Symbol(events, Decl(genericRestParameters1.ts, 149, 11))
+>emit : Symbol(emit, Decl(genericRestParameters1.ts, 145, 21))
+
+events.emit('jump', 20, 'up');
+>events.emit : Symbol(emit, Decl(genericRestParameters1.ts, 145, 21))
+>events : Symbol(events, Decl(genericRestParameters1.ts, 149, 11))
+>emit : Symbol(emit, Decl(genericRestParameters1.ts, 145, 21))
+
+events.emit('stop', 'Bye!');
+>events.emit : Symbol(emit, Decl(genericRestParameters1.ts, 145, 21))
+>events : Symbol(events, Decl(genericRestParameters1.ts, 149, 11))
+>emit : Symbol(emit, Decl(genericRestParameters1.ts, 145, 21))
+
+events.emit('done');
+>events.emit : Symbol(emit, Decl(genericRestParameters1.ts, 145, 21))
+>events : Symbol(events, Decl(genericRestParameters1.ts, 149, 11))
+>emit : Symbol(emit, Decl(genericRestParameters1.ts, 145, 21))
+
diff --git a/tests/baselines/reference/genericRestParameters1.types b/tests/baselines/reference/genericRestParameters1.types
new file mode 100644
index 0000000000000..1f2e1b1f03dfd
--- /dev/null
+++ b/tests/baselines/reference/genericRestParameters1.types
@@ -0,0 +1,851 @@
+=== tests/cases/conformance/types/rest/genericRestParameters1.ts ===
+declare let f1: (...x: [number, string, boolean]) => void;
+>f1 : (x_0: number, x_1: string, x_2: boolean) => void
+>x : [number, string, boolean]
+
+declare let f2: (x0: number, x1: string, x2: boolean) => void;
+>f2 : (x0: number, x1: string, x2: boolean) => void
+>x0 : number
+>x1 : string
+>x2 : boolean
+
+f1 = f2;
+>f1 = f2 : (x0: number, x1: string, x2: boolean) => void
+>f1 : (x_0: number, x_1: string, x_2: boolean) => void
+>f2 : (x0: number, x1: string, x2: boolean) => void
+
+f2 = f1;
+>f2 = f1 : (x_0: number, x_1: string, x_2: boolean) => void
+>f2 : (x0: number, x1: string, x2: boolean) => void
+>f1 : (x_0: number, x_1: string, x_2: boolean) => void
+
+declare const t3: [number, string, boolean];
+>t3 : [number, string, boolean]
+
+declare const t2: [string, boolean];
+>t2 : [string, boolean]
+
+declare const t1: [boolean];
+>t1 : [boolean]
+
+declare const t0: [];
+>t0 : []
+
+declare const ns: [number, string];
+>ns : [number, string]
+
+declare const sn: [string, number];
+>sn : [string, number]
+
+f1(42, "hello", true);
+>f1(42, "hello", true) : void
+>f1 : (x_0: number, x_1: string, x_2: boolean) => void
+>42 : 42
+>"hello" : "hello"
+>true : true
+
+f1(t3[0], t3[1], t3[2]);
+>f1(t3[0], t3[1], t3[2]) : void
+>f1 : (x_0: number, x_1: string, x_2: boolean) => void
+>t3[0] : number
+>t3 : [number, string, boolean]
+>0 : 0
+>t3[1] : string
+>t3 : [number, string, boolean]
+>1 : 1
+>t3[2] : boolean
+>t3 : [number, string, boolean]
+>2 : 2
+
+f1(...t3);
+>f1(...t3) : void
+>f1 : (x_0: number, x_1: string, x_2: boolean) => void
+>...t3 : string | number | boolean
+>t3 : [number, string, boolean]
+
+f1(42, ...t2);
+>f1(42, ...t2) : void
+>f1 : (x_0: number, x_1: string, x_2: boolean) => void
+>42 : 42
+>...t2 : string | boolean
+>t2 : [string, boolean]
+
+f1(42, "hello", ...t1);
+>f1(42, "hello", ...t1) : void
+>f1 : (x_0: number, x_1: string, x_2: boolean) => void
+>42 : 42
+>"hello" : "hello"
+>...t1 : boolean
+>t1 : [boolean]
+
+f1(42, "hello", true, ...t0);
+>f1(42, "hello", true, ...t0) : void
+>f1 : (x_0: number, x_1: string, x_2: boolean) => void
+>42 : 42
+>"hello" : "hello"
+>true : true
+>...t0 : never
+>t0 : []
+
+f1(ns[0], ns[1], true);
+>f1(ns[0], ns[1], true) : void
+>f1 : (x_0: number, x_1: string, x_2: boolean) => void
+>ns[0] : number
+>ns : [number, string]
+>0 : 0
+>ns[1] : string
+>ns : [number, string]
+>1 : 1
+>true : true
+
+f1(...ns, true);  // Error, tuple spread only expanded when last
+>f1(...ns, true) : void
+>f1 : (x_0: number, x_1: string, x_2: boolean) => void
+>...ns : string | number
+>ns : [number, string]
+>true : true
+
+f2(42, "hello", true);
+>f2(42, "hello", true) : void
+>f2 : (x0: number, x1: string, x2: boolean) => void
+>42 : 42
+>"hello" : "hello"
+>true : true
+
+f2(t3[0], t3[1], t3[2]);
+>f2(t3[0], t3[1], t3[2]) : void
+>f2 : (x0: number, x1: string, x2: boolean) => void
+>t3[0] : number
+>t3 : [number, string, boolean]
+>0 : 0
+>t3[1] : string
+>t3 : [number, string, boolean]
+>1 : 1
+>t3[2] : boolean
+>t3 : [number, string, boolean]
+>2 : 2
+
+f2(...t3);
+>f2(...t3) : void
+>f2 : (x0: number, x1: string, x2: boolean) => void
+>...t3 : string | number | boolean
+>t3 : [number, string, boolean]
+
+f2(42, ...t2);
+>f2(42, ...t2) : void
+>f2 : (x0: number, x1: string, x2: boolean) => void
+>42 : 42
+>...t2 : string | boolean
+>t2 : [string, boolean]
+
+f2(42, "hello", ...t1);
+>f2(42, "hello", ...t1) : void
+>f2 : (x0: number, x1: string, x2: boolean) => void
+>42 : 42
+>"hello" : "hello"
+>...t1 : boolean
+>t1 : [boolean]
+
+f2(42, "hello", true, ...t0);
+>f2(42, "hello", true, ...t0) : void
+>f2 : (x0: number, x1: string, x2: boolean) => void
+>42 : 42
+>"hello" : "hello"
+>true : true
+>...t0 : never
+>t0 : []
+
+f2(ns[0], ns[1], true);
+>f2(ns[0], ns[1], true) : void
+>f2 : (x0: number, x1: string, x2: boolean) => void
+>ns[0] : number
+>ns : [number, string]
+>0 : 0
+>ns[1] : string
+>ns : [number, string]
+>1 : 1
+>true : true
+
+f2(...ns, true);  // Error, tuple spread only expanded when last
+>f2(...ns, true) : void
+>f2 : (x0: number, x1: string, x2: boolean) => void
+>...ns : string | number
+>ns : [number, string]
+>true : true
+
+declare function f10<T extends unknown[]>(...args: T): T;
+>f10 : <T extends unknown[]>(...args: T) => T
+>T : T
+>args : T
+>T : T
+>T : T
+
+const x10 = f10(42, "hello", true);  // [number, string, boolean]
+>x10 : [number, string, boolean]
+>f10(42, "hello", true) : [number, string, boolean]
+>f10 : <T extends unknown[]>(...args: T) => T
+>42 : 42
+>"hello" : "hello"
+>true : true
+
+const x11 = f10(42, "hello");  // [number, string]
+>x11 : [number, string]
+>f10(42, "hello") : [number, string]
+>f10 : <T extends unknown[]>(...args: T) => T
+>42 : 42
+>"hello" : "hello"
+
+const x12 = f10(42);  // [number]
+>x12 : [number]
+>f10(42) : [number]
+>f10 : <T extends unknown[]>(...args: T) => T
+>42 : 42
+
+const x13 = f10();  // []
+>x13 : []
+>f10() : []
+>f10 : <T extends unknown[]>(...args: T) => T
+
+const x14 = f10(...t3);  // [number, string, boolean]
+>x14 : [number, string, boolean]
+>f10(...t3) : [number, string, boolean]
+>f10 : <T extends unknown[]>(...args: T) => T
+>...t3 : string | number | boolean
+>t3 : [number, string, boolean]
+
+const x15 = f10(42, ...t2);  // [number, string, boolean]
+>x15 : [number, string, boolean]
+>f10(42, ...t2) : [number, string, boolean]
+>f10 : <T extends unknown[]>(...args: T) => T
+>42 : 42
+>...t2 : string | boolean
+>t2 : [string, boolean]
+
+const x16 = f10(42, "hello", ...t1);  // [number, string, boolean]
+>x16 : [number, string, boolean]
+>f10(42, "hello", ...t1) : [number, string, boolean]
+>f10 : <T extends unknown[]>(...args: T) => T
+>42 : 42
+>"hello" : "hello"
+>...t1 : boolean
+>t1 : [boolean]
+
+const x17 = f10(42, "hello", true, ...t0);  // [number, string, boolean]
+>x17 : [number, string, boolean]
+>f10(42, "hello", true, ...t0) : [number, string, boolean]
+>f10 : <T extends unknown[]>(...args: T) => T
+>42 : 42
+>"hello" : "hello"
+>true : true
+>...t0 : never
+>t0 : []
+
+const x18 = f10(...ns, true);  // (string | number | boolean)[]
+>x18 : (string | number | boolean)[]
+>f10(...ns, true) : (string | number | boolean)[]
+>f10 : <T extends unknown[]>(...args: T) => T
+>...ns : string | number
+>ns : [number, string]
+>true : true
+
+function g10<U extends string[], V extends [number, number]>(u: U, v: V) {
+>g10 : <U extends string[], V extends [number, number]>(u: U, v: V) => void
+>U : U
+>V : V
+>u : U
+>U : U
+>v : V
+>V : V
+
+    let x1 = f10(...u);  // U
+>x1 : U
+>f10(...u) : U
+>f10 : <T extends unknown[]>(...args: T) => T
+>...u : string
+>u : U
+
+    let x2 = f10(...v);  // V
+>x2 : V
+>f10(...v) : V
+>f10 : <T extends unknown[]>(...args: T) => T
+>...v : number
+>v : V
+
+    let x3 = f10(1, ...u);  // (string | number)[]
+>x3 : (string | number)[]
+>f10(1, ...u) : (string | number)[]
+>f10 : <T extends unknown[]>(...args: T) => T
+>1 : 1
+>...u : string
+>u : U
+
+    let x4 = f10(...u, ...v);  // (string | number)[]
+>x4 : (string | number)[]
+>f10(...u, ...v) : (string | number)[]
+>f10 : <T extends unknown[]>(...args: T) => T
+>...u : string
+>u : U
+>...v : number
+>v : V
+}
+
+declare function f11<T extends (string | number | boolean)[]>(...args: T): T;
+>f11 : <T extends (string | number | boolean)[]>(...args: T) => T
+>T : T
+>args : T
+>T : T
+>T : T
+
+const z10 = f11(42, "hello", true);  // [42, "hello", true]
+>z10 : [42, "hello", true]
+>f11(42, "hello", true) : [42, "hello", true]
+>f11 : <T extends (string | number | boolean)[]>(...args: T) => T
+>42 : 42
+>"hello" : "hello"
+>true : true
+
+const z11 = f11(42, "hello");  // [42, "hello"]
+>z11 : [42, "hello"]
+>f11(42, "hello") : [42, "hello"]
+>f11 : <T extends (string | number | boolean)[]>(...args: T) => T
+>42 : 42
+>"hello" : "hello"
+
+const z12 = f11(42);  // [42]
+>z12 : [42]
+>f11(42) : [42]
+>f11 : <T extends (string | number | boolean)[]>(...args: T) => T
+>42 : 42
+
+const z13 = f11();  // []
+>z13 : []
+>f11() : []
+>f11 : <T extends (string | number | boolean)[]>(...args: T) => T
+
+const z14 = f11(...t3);  // [number, string, boolean]
+>z14 : [number, string, boolean]
+>f11(...t3) : [number, string, boolean]
+>f11 : <T extends (string | number | boolean)[]>(...args: T) => T
+>...t3 : string | number | boolean
+>t3 : [number, string, boolean]
+
+const z15 = f11(42, ...t2);  // [42, string, boolean]
+>z15 : [42, string, boolean]
+>f11(42, ...t2) : [42, string, boolean]
+>f11 : <T extends (string | number | boolean)[]>(...args: T) => T
+>42 : 42
+>...t2 : string | boolean
+>t2 : [string, boolean]
+
+const z16 = f11(42, "hello", ...t1);  // [42, "hello", boolean]
+>z16 : [42, "hello", boolean]
+>f11(42, "hello", ...t1) : [42, "hello", boolean]
+>f11 : <T extends (string | number | boolean)[]>(...args: T) => T
+>42 : 42
+>"hello" : "hello"
+>...t1 : boolean
+>t1 : [boolean]
+
+const z17 = f11(42, "hello", true, ...t0);  // [42, "hello", true]
+>z17 : [42, "hello", true]
+>f11(42, "hello", true, ...t0) : [42, "hello", true]
+>f11 : <T extends (string | number | boolean)[]>(...args: T) => T
+>42 : 42
+>"hello" : "hello"
+>true : true
+>...t0 : never
+>t0 : []
+
+const z18 = f11(...ns, true);  // (string | number | true)[]
+>z18 : (string | number | true)[]
+>f11(...ns, true) : (string | number | true)[]
+>f11 : <T extends (string | number | boolean)[]>(...args: T) => T
+>...ns : string | number
+>ns : [number, string]
+>true : true
+
+function g11<U extends string[], V extends [number, number]>(u: U, v: V) {
+>g11 : <U extends string[], V extends [number, number]>(u: U, v: V) => void
+>U : U
+>V : V
+>u : U
+>U : U
+>v : V
+>V : V
+
+    let x1 = f11(...u);  // U
+>x1 : U
+>f11(...u) : U
+>f11 : <T extends (string | number | boolean)[]>(...args: T) => T
+>...u : string
+>u : U
+
+    let x2 = f11(...v);  // V
+>x2 : V
+>f11(...v) : V
+>f11 : <T extends (string | number | boolean)[]>(...args: T) => T
+>...v : number
+>v : V
+
+    let x3 = f11(1, ...u);  // (string | 1)[]
+>x3 : (string | 1)[]
+>f11(1, ...u) : (string | 1)[]
+>f11 : <T extends (string | number | boolean)[]>(...args: T) => T
+>1 : 1
+>...u : string
+>u : U
+
+    let x4 = f11(...u, ...v);  // (string | number)[]
+>x4 : (string | number)[]
+>f11(...u, ...v) : (string | number)[]
+>f11 : <T extends (string | number | boolean)[]>(...args: T) => T
+>...u : string
+>u : U
+>...v : number
+>v : V
+}
+
+function call<T extends unknown[], U>(f: (...args: T) => U, ...args: T) {
+>call : <T extends unknown[], U>(f: (...args: T) => U, ...args: T) => U
+>T : T
+>U : U
+>f : (...args: T) => U
+>args : T
+>T : T
+>U : U
+>args : T
+>T : T
+
+    return f(...args);
+>f(...args) : U
+>f : (...args: T) => U
+>...args : unknown
+>args : T
+}
+
+function callr<T extends unknown[], U>(args: T, f: (...args: T) => U) {
+>callr : <T extends unknown[], U>(args: T, f: (...args: T) => U) => U
+>T : T
+>U : U
+>args : T
+>T : T
+>f : (...args: T) => U
+>args : T
+>T : T
+>U : U
+
+    return f(...args);
+>f(...args) : U
+>f : (...args: T) => U
+>...args : unknown
+>args : T
+}
+
+declare function f15(a: string, b: number): string | number;
+>f15 : (a: string, b: number) => string | number
+>a : string
+>b : number
+
+declare function f16<A, B>(a: A, b: B): A | B;
+>f16 : <A, B>(a: A, b: B) => A | B
+>A : A
+>B : B
+>a : A
+>A : A
+>b : B
+>B : B
+>A : A
+>B : B
+
+let x20 = call((x, y) => x + y, 10, 20);  // number
+>x20 : number
+>call((x, y) => x + y, 10, 20) : number
+>call : <T extends unknown[], U>(f: (...args: T) => U, ...args: T) => U
+>(x, y) => x + y : (x: number, y: number) => number
+>x : number
+>y : number
+>x + y : number
+>x : number
+>y : number
+>10 : 10
+>20 : 20
+
+let x21 = call((x, y) => x + y, 10, "hello");  // string
+>x21 : string
+>call((x, y) => x + y, 10, "hello") : string
+>call : <T extends unknown[], U>(f: (...args: T) => U, ...args: T) => U
+>(x, y) => x + y : (x: number, y: string) => string
+>x : number
+>y : string
+>x + y : string
+>x : number
+>y : string
+>10 : 10
+>"hello" : "hello"
+
+let x22 = call(f15, "hello", 42);  // string | number
+>x22 : string | number
+>call(f15, "hello", 42) : string | number
+>call : <T extends unknown[], U>(f: (...args: T) => U, ...args: T) => U
+>f15 : (a: string, b: number) => string | number
+>"hello" : "hello"
+>42 : 42
+
+let x23 = call(f16, "hello", 42);  // unknown
+>x23 : unknown
+>call(f16, "hello", 42) : unknown
+>call : <T extends unknown[], U>(f: (...args: T) => U, ...args: T) => U
+>f16 : <A, B>(a: A, b: B) => A | B
+>"hello" : "hello"
+>42 : 42
+
+let x24 = call<[string, number], string | number>(f16, "hello", 42);  // string | number
+>x24 : string | number
+>call<[string, number], string | number>(f16, "hello", 42) : string | number
+>call : <T extends unknown[], U>(f: (...args: T) => U, ...args: T) => U
+>f16 : <A, B>(a: A, b: B) => A | B
+>"hello" : "hello"
+>42 : 42
+
+let x30 = callr(sn, (x, y) => x + y);  // string
+>x30 : string
+>callr(sn, (x, y) => x + y) : string
+>callr : <T extends unknown[], U>(args: T, f: (...args: T) => U) => U
+>sn : [string, number]
+>(x, y) => x + y : (x: string, y: number) => string
+>x : string
+>y : number
+>x + y : string
+>x : string
+>y : number
+
+let x31 = callr(sn, f15);  // string | number
+>x31 : string | number
+>callr(sn, f15) : string | number
+>callr : <T extends unknown[], U>(args: T, f: (...args: T) => U) => U
+>sn : [string, number]
+>f15 : (a: string, b: number) => string | number
+
+let x32 = callr(sn, f16);  // string | number
+>x32 : string | number
+>callr(sn, f16) : string | number
+>callr : <T extends unknown[], U>(args: T, f: (...args: T) => U) => U
+>sn : [string, number]
+>f16 : <A, B>(a: A, b: B) => A | B
+
+function bind<T, U extends unknown[], V>(f: (x: T, ...rest: U) => V, x: T) {
+>bind : <T, U extends unknown[], V>(f: (x: T, ...rest: U) => V, x: T) => (...rest: U) => V
+>T : T
+>U : U
+>V : V
+>f : (x: T, ...rest: U) => V
+>x : T
+>T : T
+>rest : U
+>U : U
+>V : V
+>x : T
+>T : T
+
+    return (...rest: U) => f(x, ...rest);
+>(...rest: U) => f(x, ...rest) : (...rest: U) => V
+>rest : U
+>U : U
+>f(x, ...rest) : V
+>f : (x: T, ...rest: U) => V
+>x : T
+>...rest : unknown
+>rest : U
+}
+
+declare const f20: (x: number, y: string, z: boolean) => string[];
+>f20 : (x: number, y: string, z: boolean) => string[]
+>x : number
+>y : string
+>z : boolean
+
+const f21 = bind(f20, 42);  // (y: string, z: boolean) => string[]
+>f21 : (y: string, z: boolean) => string[]
+>bind(f20, 42) : (y: string, z: boolean) => string[]
+>bind : <T, U extends unknown[], V>(f: (x: T, ...rest: U) => V, x: T) => (...rest: U) => V
+>f20 : (x: number, y: string, z: boolean) => string[]
+>42 : 42
+
+const f22 = bind(f21, "hello");  // (z: boolean) => string[]
+>f22 : (z: boolean) => string[]
+>bind(f21, "hello") : (z: boolean) => string[]
+>bind : <T, U extends unknown[], V>(f: (x: T, ...rest: U) => V, x: T) => (...rest: U) => V
+>f21 : (y: string, z: boolean) => string[]
+>"hello" : "hello"
+
+const f23 = bind(f22, true);  // () => string[]
+>f23 : () => string[]
+>bind(f22, true) : () => string[]
+>bind : <T, U extends unknown[], V>(f: (x: T, ...rest: U) => V, x: T) => (...rest: U) => V
+>f22 : (z: boolean) => string[]
+>true : true
+
+f20(42, "hello", true);
+>f20(42, "hello", true) : string[]
+>f20 : (x: number, y: string, z: boolean) => string[]
+>42 : 42
+>"hello" : "hello"
+>true : true
+
+f21("hello", true);
+>f21("hello", true) : string[]
+>f21 : (y: string, z: boolean) => string[]
+>"hello" : "hello"
+>true : true
+
+f22(true);
+>f22(true) : string[]
+>f22 : (z: boolean) => string[]
+>true : true
+
+f23();
+>f23() : string[]
+>f23 : () => string[]
+
+declare const g20: (x: number, y?: string, z?: boolean) => string[];
+>g20 : (x: number, y?: string | undefined, z?: boolean | undefined) => string[]
+>x : number
+>y : string | undefined
+>z : boolean | undefined
+
+const g21 = bind(g20, 42);  // (y: string, z: boolean) => string[]
+>g21 : (y?: string | undefined, z?: boolean | undefined) => string[]
+>bind(g20, 42) : (y?: string | undefined, z?: boolean | undefined) => string[]
+>bind : <T, U extends unknown[], V>(f: (x: T, ...rest: U) => V, x: T) => (...rest: U) => V
+>g20 : (x: number, y?: string | undefined, z?: boolean | undefined) => string[]
+>42 : 42
+
+const g22 = bind(g21, "hello");  // (z: boolean) => string[]
+>g22 : (z?: boolean | undefined) => string[]
+>bind(g21, "hello") : (z?: boolean | undefined) => string[]
+>bind : <T, U extends unknown[], V>(f: (x: T, ...rest: U) => V, x: T) => (...rest: U) => V
+>g21 : (y?: string | undefined, z?: boolean | undefined) => string[]
+>"hello" : "hello"
+
+const g23 = bind(g22, true);  // () => string[]
+>g23 : () => string[]
+>bind(g22, true) : () => string[]
+>bind : <T, U extends unknown[], V>(f: (x: T, ...rest: U) => V, x: T) => (...rest: U) => V
+>g22 : (z?: boolean | undefined) => string[]
+>true : true
+
+g20(42, "hello", true);
+>g20(42, "hello", true) : string[]
+>g20 : (x: number, y?: string | undefined, z?: boolean | undefined) => string[]
+>42 : 42
+>"hello" : "hello"
+>true : true
+
+g20(42, "hello");
+>g20(42, "hello") : string[]
+>g20 : (x: number, y?: string | undefined, z?: boolean | undefined) => string[]
+>42 : 42
+>"hello" : "hello"
+
+g20(42);
+>g20(42) : string[]
+>g20 : (x: number, y?: string | undefined, z?: boolean | undefined) => string[]
+>42 : 42
+
+g21("hello", true);
+>g21("hello", true) : string[]
+>g21 : (y?: string | undefined, z?: boolean | undefined) => string[]
+>"hello" : "hello"
+>true : true
+
+g21("hello");
+>g21("hello") : string[]
+>g21 : (y?: string | undefined, z?: boolean | undefined) => string[]
+>"hello" : "hello"
+
+g21();
+>g21() : string[]
+>g21 : (y?: string | undefined, z?: boolean | undefined) => string[]
+
+g22(true);
+>g22(true) : string[]
+>g22 : (z?: boolean | undefined) => string[]
+>true : true
+
+g22();
+>g22() : string[]
+>g22 : (z?: boolean | undefined) => string[]
+
+g23();
+>g23() : string[]
+>g23 : () => string[]
+
+declare function f30<T, U extends ((x: T) => any)[]>(x: T, ...args: U): U;
+>f30 : <T, U extends ((x: T) => any)[]>(x: T, ...args: U) => U
+>T : T
+>U : U
+>x : T
+>T : T
+>x : T
+>T : T
+>args : U
+>U : U
+>U : U
+
+const c30 = f30(42, x => "" + x, x => x + 1);  // [(x: number) => string, (x: number) => number]
+>c30 : [(x: number) => string, (x: number) => number]
+>f30(42, x => "" + x, x => x + 1) : [(x: number) => string, (x: number) => number]
+>f30 : <T, U extends ((x: T) => any)[]>(x: T, ...args: U) => U
+>42 : 42
+>x => "" + x : (x: number) => string
+>x : number
+>"" + x : string
+>"" : ""
+>x : number
+>x => x + 1 : (x: number) => number
+>x : number
+>x + 1 : number
+>x : number
+>1 : 1
+
+type Parameters<T extends Function> = T extends ((...args: infer U) => any) | (new(...args: infer U) => any) ? U : any[];
+>Parameters : Parameters<T>
+>T : T
+>Function : Function
+>T : T
+>args : U
+>U : U
+>args : U
+>U : U
+>U : U
+
+type T01 = Parameters<(x: number, y: string, z: boolean) => void>;
+>T01 : [number, string, boolean]
+>Parameters : Parameters<T>
+>x : number
+>y : string
+>z : boolean
+
+type T02 = Parameters<(...args: [number, string, boolean]) => void>;
+>T02 : [number, string, boolean]
+>Parameters : Parameters<T>
+>args : [number, string, boolean]
+
+type T03 = Parameters<new (x: number, y: string, z: boolean) => void>;
+>T03 : [number, string, boolean]
+>Parameters : Parameters<T>
+>x : number
+>y : string
+>z : boolean
+
+type T04 = Parameters<new (...args: [number, string, boolean]) => void>;
+>T04 : [number, string, boolean]
+>Parameters : Parameters<T>
+>args : [number, string, boolean]
+
+type T05<T> = Parameters<(...args: T[]) => void>;
+>T05 : T[]
+>T : T
+>Parameters : Parameters<T>
+>args : T[]
+>T : T
+
+type T06<T> = Parameters<new (...args: []) => void>;
+>T06 : []
+>T : T
+>Parameters : Parameters<T>
+>args : []
+
+type T07<T extends any[]> = Parameters<(...args: T) => void>;
+>T07 : T
+>T : T
+>Parameters : Parameters<T>
+>args : T
+>T : T
+
+type T08<T extends any[]> = Parameters<new (...args: T) => void>;
+>T08 : T
+>T : T
+>Parameters : Parameters<T>
+>args : T
+>T : T
+
+type T09 = Parameters<Function>;
+>T09 : any[]
+>Parameters : Parameters<T>
+>Function : Function
+
+type Record1 = {
+>Record1 : Record1
+
+  move: [number, 'left' | 'right'];
+>move : [number, "left" | "right"]
+
+  jump: [number, 'up' | 'down'];
+>jump : [number, "up" | "down"]
+
+  stop: string;
+>stop : string
+
+  done: [];
+>done : []
+}
+
+type EventType<T> = {
+>EventType : EventType<T>
+>T : T
+
+  emit<K extends keyof T = keyof T>(e: K, ...payload: T[K] extends any[] ? T[K] : [T[K]]): void; 
+>emit : <K extends keyof T = keyof T>(e: K, ...payload: T[K] extends any[] ? T[K] : [T[K]]) => void
+>K : K
+>T : T
+>T : T
+>e : K
+>K : K
+>payload : T[K] extends any[] ? T[K] : [T[K]]
+>T : T
+>K : K
+>T : T
+>K : K
+>T : T
+>K : K
+}
+
+declare var events: EventType<Record1>;
+>events : EventType<Record1>
+>EventType : EventType<T>
+>Record1 : Record1
+
+events.emit('move', 10, 'left');
+>events.emit('move', 10, 'left') : void
+>events.emit : <K extends "move" | "jump" | "stop" | "done" = "move" | "jump" | "stop" | "done">(e: K, ...payload: Record1[K] extends any[] ? Record1[K] : [Record1[K]]) => void
+>events : EventType<Record1>
+>emit : <K extends "move" | "jump" | "stop" | "done" = "move" | "jump" | "stop" | "done">(e: K, ...payload: Record1[K] extends any[] ? Record1[K] : [Record1[K]]) => void
+>'move' : "move"
+>10 : 10
+>'left' : "left"
+
+events.emit('jump', 20, 'up');
+>events.emit('jump', 20, 'up') : void
+>events.emit : <K extends "move" | "jump" | "stop" | "done" = "move" | "jump" | "stop" | "done">(e: K, ...payload: Record1[K] extends any[] ? Record1[K] : [Record1[K]]) => void
+>events : EventType<Record1>
+>emit : <K extends "move" | "jump" | "stop" | "done" = "move" | "jump" | "stop" | "done">(e: K, ...payload: Record1[K] extends any[] ? Record1[K] : [Record1[K]]) => void
+>'jump' : "jump"
+>20 : 20
+>'up' : "up"
+
+events.emit('stop', 'Bye!');
+>events.emit('stop', 'Bye!') : void
+>events.emit : <K extends "move" | "jump" | "stop" | "done" = "move" | "jump" | "stop" | "done">(e: K, ...payload: Record1[K] extends any[] ? Record1[K] : [Record1[K]]) => void
+>events : EventType<Record1>
+>emit : <K extends "move" | "jump" | "stop" | "done" = "move" | "jump" | "stop" | "done">(e: K, ...payload: Record1[K] extends any[] ? Record1[K] : [Record1[K]]) => void
+>'stop' : "stop"
+>'Bye!' : "Bye!"
+
+events.emit('done');
+>events.emit('done') : void
+>events.emit : <K extends "move" | "jump" | "stop" | "done" = "move" | "jump" | "stop" | "done">(e: K, ...payload: Record1[K] extends any[] ? Record1[K] : [Record1[K]]) => void
+>events : EventType<Record1>
+>emit : <K extends "move" | "jump" | "stop" | "done" = "move" | "jump" | "stop" | "done">(e: K, ...payload: Record1[K] extends any[] ? Record1[K] : [Record1[K]]) => void
+>'done' : "done"
+
diff --git a/tests/baselines/reference/optionalTupleElements1.errors.txt b/tests/baselines/reference/optionalTupleElements1.errors.txt
new file mode 100644
index 0000000000000..b9c520c483cf0
--- /dev/null
+++ b/tests/baselines/reference/optionalTupleElements1.errors.txt
@@ -0,0 +1,157 @@
+tests/cases/conformance/types/tuple/optionalTupleElements1.ts(13,5): error TS2322: Type '[number, string, (boolean | undefined)?]' is not assignable to type '[number, string, boolean]'.
+  Types of property '2' are incompatible.
+    Type 'boolean | undefined' is not assignable to type 'boolean'.
+      Type 'undefined' is not assignable to type 'boolean'.
+tests/cases/conformance/types/tuple/optionalTupleElements1.ts(14,5): error TS2322: Type '[number, (string | undefined)?, (boolean | undefined)?]' is not assignable to type '[number, string, boolean]'.
+  Types of property '1' are incompatible.
+    Type 'string | undefined' is not assignable to type 'string'.
+      Type 'undefined' is not assignable to type 'string'.
+tests/cases/conformance/types/tuple/optionalTupleElements1.ts(15,5): error TS2322: Type '[(number | undefined)?, (string | undefined)?, (boolean | undefined)?]' is not assignable to type '[number, string, boolean]'.
+  Types of property '0' are incompatible.
+    Type 'number | undefined' is not assignable to type 'number'.
+      Type 'undefined' is not assignable to type 'number'.
+tests/cases/conformance/types/tuple/optionalTupleElements1.ts(18,5): error TS2322: Type '[number, (string | undefined)?, (boolean | undefined)?]' is not assignable to type '[number, string, (boolean | undefined)?]'.
+  Types of property '1' are incompatible.
+    Type 'string | undefined' is not assignable to type 'string'.
+      Type 'undefined' is not assignable to type 'string'.
+tests/cases/conformance/types/tuple/optionalTupleElements1.ts(19,5): error TS2322: Type '[(number | undefined)?, (string | undefined)?, (boolean | undefined)?]' is not assignable to type '[number, string, (boolean | undefined)?]'.
+  Types of property '0' are incompatible.
+    Type 'number | undefined' is not assignable to type 'number'.
+      Type 'undefined' is not assignable to type 'number'.
+tests/cases/conformance/types/tuple/optionalTupleElements1.ts(23,5): error TS2322: Type '[(number | undefined)?, (string | undefined)?, (boolean | undefined)?]' is not assignable to type '[number, (string | undefined)?, (boolean | undefined)?]'.
+  Types of property '0' are incompatible.
+    Type 'number | undefined' is not assignable to type 'number'.
+      Type 'undefined' is not assignable to type 'number'.
+tests/cases/conformance/types/tuple/optionalTupleElements1.ts(34,5): error TS2322: Type '[number, string | undefined, boolean]' is not assignable to type '[number, string, boolean]'.
+  Type 'string | undefined' is not assignable to type 'string'.
+    Type 'undefined' is not assignable to type 'string'.
+tests/cases/conformance/types/tuple/optionalTupleElements1.ts(35,5): error TS2322: Type '[number, string | undefined, boolean]' is not assignable to type '[number, string, (boolean | undefined)?]'.
+  Types of property '1' are incompatible.
+    Type 'string | undefined' is not assignable to type 'string'.
+      Type 'undefined' is not assignable to type 'string'.
+tests/cases/conformance/types/tuple/optionalTupleElements1.ts(40,5): error TS2322: Type '[number, string, (boolean | undefined)?]' is not assignable to type '[number, string | undefined, boolean]'.
+  Types of property '2' are incompatible.
+    Type 'boolean | undefined' is not assignable to type 'boolean'.
+      Type 'undefined' is not assignable to type 'boolean'.
+tests/cases/conformance/types/tuple/optionalTupleElements1.ts(41,5): error TS2322: Type '[number, (string | undefined)?, (boolean | undefined)?]' is not assignable to type '[number, string | undefined, boolean]'.
+  Property '1' is optional in type '[number, (string | undefined)?, (boolean | undefined)?]' but required in type '[number, string | undefined, boolean]'.
+tests/cases/conformance/types/tuple/optionalTupleElements1.ts(42,5): error TS2322: Type '[(number | undefined)?, (string | undefined)?, (boolean | undefined)?]' is not assignable to type '[number, string | undefined, boolean]'.
+  Types of property '0' are incompatible.
+    Type 'number | undefined' is not assignable to type 'number'.
+      Type 'undefined' is not assignable to type 'number'.
+
+
+==== tests/cases/conformance/types/tuple/optionalTupleElements1.ts (11 errors) ====
+    type T1 = [number, string, boolean];
+    type T2 = [number, string, boolean?];
+    type T3 = [number, string?, boolean?];
+    type T4 = [number?, string?, boolean?];
+    
+    type L1 = T1["length"];
+    type L2 = T2["length"];
+    type L3 = T3["length"];
+    type L4 = T4["length"];
+    
+    function f1(t1: T1, t2: T2, t3: T3, t4: T4) {
+        t1 = t1;
+        t1 = t2;  // Error
+        ~~
+!!! error TS2322: Type '[number, string, (boolean | undefined)?]' is not assignable to type '[number, string, boolean]'.
+!!! error TS2322:   Types of property '2' are incompatible.
+!!! error TS2322:     Type 'boolean | undefined' is not assignable to type 'boolean'.
+!!! error TS2322:       Type 'undefined' is not assignable to type 'boolean'.
+        t1 = t3;  // Error
+        ~~
+!!! error TS2322: Type '[number, (string | undefined)?, (boolean | undefined)?]' is not assignable to type '[number, string, boolean]'.
+!!! error TS2322:   Types of property '1' are incompatible.
+!!! error TS2322:     Type 'string | undefined' is not assignable to type 'string'.
+!!! error TS2322:       Type 'undefined' is not assignable to type 'string'.
+        t1 = t4;  // Error
+        ~~
+!!! error TS2322: Type '[(number | undefined)?, (string | undefined)?, (boolean | undefined)?]' is not assignable to type '[number, string, boolean]'.
+!!! error TS2322:   Types of property '0' are incompatible.
+!!! error TS2322:     Type 'number | undefined' is not assignable to type 'number'.
+!!! error TS2322:       Type 'undefined' is not assignable to type 'number'.
+        t2 = t1;
+        t2 = t2;
+        t2 = t3;  // Error
+        ~~
+!!! error TS2322: Type '[number, (string | undefined)?, (boolean | undefined)?]' is not assignable to type '[number, string, (boolean | undefined)?]'.
+!!! error TS2322:   Types of property '1' are incompatible.
+!!! error TS2322:     Type 'string | undefined' is not assignable to type 'string'.
+!!! error TS2322:       Type 'undefined' is not assignable to type 'string'.
+        t2 = t4;  // Error
+        ~~
+!!! error TS2322: Type '[(number | undefined)?, (string | undefined)?, (boolean | undefined)?]' is not assignable to type '[number, string, (boolean | undefined)?]'.
+!!! error TS2322:   Types of property '0' are incompatible.
+!!! error TS2322:     Type 'number | undefined' is not assignable to type 'number'.
+!!! error TS2322:       Type 'undefined' is not assignable to type 'number'.
+        t3 = t1;
+        t3 = t2;
+        t3 = t3;
+        t3 = t4;  // Error
+        ~~
+!!! error TS2322: Type '[(number | undefined)?, (string | undefined)?, (boolean | undefined)?]' is not assignable to type '[number, (string | undefined)?, (boolean | undefined)?]'.
+!!! error TS2322:   Types of property '0' are incompatible.
+!!! error TS2322:     Type 'number | undefined' is not assignable to type 'number'.
+!!! error TS2322:       Type 'undefined' is not assignable to type 'number'.
+        t4 = t1;
+        t4 = t2;
+        t4 = t3;
+        t4 = t4;
+    }
+    
+    type T5 = [number, string?, boolean];
+    type L5 = T5["length"];
+    
+    function f2(t1: T1, t2: T2, t3: T3, t4: T4, t5: T5) {
+        t1 = t5;  // Error
+        ~~
+!!! error TS2322: Type '[number, string | undefined, boolean]' is not assignable to type '[number, string, boolean]'.
+!!! error TS2322:   Type 'string | undefined' is not assignable to type 'string'.
+!!! error TS2322:     Type 'undefined' is not assignable to type 'string'.
+        t2 = t5;  // Error
+        ~~
+!!! error TS2322: Type '[number, string | undefined, boolean]' is not assignable to type '[number, string, (boolean | undefined)?]'.
+!!! error TS2322:   Types of property '1' are incompatible.
+!!! error TS2322:     Type 'string | undefined' is not assignable to type 'string'.
+!!! error TS2322:       Type 'undefined' is not assignable to type 'string'.
+        t3 = t5;
+        t4 = t5;
+        t5 = t5;
+        t5 = t1;
+        t5 = t2;  // Error
+        ~~
+!!! error TS2322: Type '[number, string, (boolean | undefined)?]' is not assignable to type '[number, string | undefined, boolean]'.
+!!! error TS2322:   Types of property '2' are incompatible.
+!!! error TS2322:     Type 'boolean | undefined' is not assignable to type 'boolean'.
+!!! error TS2322:       Type 'undefined' is not assignable to type 'boolean'.
+        t5 = t3;  // Error
+        ~~
+!!! error TS2322: Type '[number, (string | undefined)?, (boolean | undefined)?]' is not assignable to type '[number, string | undefined, boolean]'.
+!!! error TS2322:   Property '1' is optional in type '[number, (string | undefined)?, (boolean | undefined)?]' but required in type '[number, string | undefined, boolean]'.
+        t5 = t4;  // Error
+        ~~
+!!! error TS2322: Type '[(number | undefined)?, (string | undefined)?, (boolean | undefined)?]' is not assignable to type '[number, string | undefined, boolean]'.
+!!! error TS2322:   Types of property '0' are incompatible.
+!!! error TS2322:     Type 'number | undefined' is not assignable to type 'number'.
+!!! error TS2322:       Type 'undefined' is not assignable to type 'number'.
+        t5 = t5;
+    }
+    
+    let t2: T2;
+    let t3: T3;
+    let t4: T4;
+    let t5: T5;
+    
+    t2 = [42, "hello"];
+    t3 = [42, "hello"];
+    t3 = [42,,true]
+    t3 = [42];
+    t4 = [42, "hello"];
+    t4 = [42,,true];
+    t4 = [,"hello", true];
+    t4 = [,,true];
+    t4 = [];
+    t5 = [42,,true];
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/optionalTupleElements1.js b/tests/baselines/reference/optionalTupleElements1.js
new file mode 100644
index 0000000000000..118b3fb1845bd
--- /dev/null
+++ b/tests/baselines/reference/optionalTupleElements1.js
@@ -0,0 +1,128 @@
+//// [optionalTupleElements1.ts]
+type T1 = [number, string, boolean];
+type T2 = [number, string, boolean?];
+type T3 = [number, string?, boolean?];
+type T4 = [number?, string?, boolean?];
+
+type L1 = T1["length"];
+type L2 = T2["length"];
+type L3 = T3["length"];
+type L4 = T4["length"];
+
+function f1(t1: T1, t2: T2, t3: T3, t4: T4) {
+    t1 = t1;
+    t1 = t2;  // Error
+    t1 = t3;  // Error
+    t1 = t4;  // Error
+    t2 = t1;
+    t2 = t2;
+    t2 = t3;  // Error
+    t2 = t4;  // Error
+    t3 = t1;
+    t3 = t2;
+    t3 = t3;
+    t3 = t4;  // Error
+    t4 = t1;
+    t4 = t2;
+    t4 = t3;
+    t4 = t4;
+}
+
+type T5 = [number, string?, boolean];
+type L5 = T5["length"];
+
+function f2(t1: T1, t2: T2, t3: T3, t4: T4, t5: T5) {
+    t1 = t5;  // Error
+    t2 = t5;  // Error
+    t3 = t5;
+    t4 = t5;
+    t5 = t5;
+    t5 = t1;
+    t5 = t2;  // Error
+    t5 = t3;  // Error
+    t5 = t4;  // Error
+    t5 = t5;
+}
+
+let t2: T2;
+let t3: T3;
+let t4: T4;
+let t5: T5;
+
+t2 = [42, "hello"];
+t3 = [42, "hello"];
+t3 = [42,,true]
+t3 = [42];
+t4 = [42, "hello"];
+t4 = [42,,true];
+t4 = [,"hello", true];
+t4 = [,,true];
+t4 = [];
+t5 = [42,,true];
+
+
+//// [optionalTupleElements1.js]
+"use strict";
+function f1(t1, t2, t3, t4) {
+    t1 = t1;
+    t1 = t2; // Error
+    t1 = t3; // Error
+    t1 = t4; // Error
+    t2 = t1;
+    t2 = t2;
+    t2 = t3; // Error
+    t2 = t4; // Error
+    t3 = t1;
+    t3 = t2;
+    t3 = t3;
+    t3 = t4; // Error
+    t4 = t1;
+    t4 = t2;
+    t4 = t3;
+    t4 = t4;
+}
+function f2(t1, t2, t3, t4, t5) {
+    t1 = t5; // Error
+    t2 = t5; // Error
+    t3 = t5;
+    t4 = t5;
+    t5 = t5;
+    t5 = t1;
+    t5 = t2; // Error
+    t5 = t3; // Error
+    t5 = t4; // Error
+    t5 = t5;
+}
+var t2;
+var t3;
+var t4;
+var t5;
+t2 = [42, "hello"];
+t3 = [42, "hello"];
+t3 = [42, , true];
+t3 = [42];
+t4 = [42, "hello"];
+t4 = [42, , true];
+t4 = [, "hello", true];
+t4 = [, , true];
+t4 = [];
+t5 = [42, , true];
+
+
+//// [optionalTupleElements1.d.ts]
+declare type T1 = [number, string, boolean];
+declare type T2 = [number, string, boolean?];
+declare type T3 = [number, string?, boolean?];
+declare type T4 = [number?, string?, boolean?];
+declare type L1 = T1["length"];
+declare type L2 = T2["length"];
+declare type L3 = T3["length"];
+declare type L4 = T4["length"];
+declare function f1(t1: T1, t2: T2, t3: T3, t4: T4): void;
+declare type T5 = [number, string?, boolean];
+declare type L5 = T5["length"];
+declare function f2(t1: T1, t2: T2, t3: T3, t4: T4, t5: T5): void;
+declare let t2: T2;
+declare let t3: T3;
+declare let t4: T4;
+declare let t5: T5;
diff --git a/tests/baselines/reference/optionalTupleElements1.symbols b/tests/baselines/reference/optionalTupleElements1.symbols
new file mode 100644
index 0000000000000..8148ccffef9e6
--- /dev/null
+++ b/tests/baselines/reference/optionalTupleElements1.symbols
@@ -0,0 +1,212 @@
+=== tests/cases/conformance/types/tuple/optionalTupleElements1.ts ===
+type T1 = [number, string, boolean];
+>T1 : Symbol(T1, Decl(optionalTupleElements1.ts, 0, 0))
+
+type T2 = [number, string, boolean?];
+>T2 : Symbol(T2, Decl(optionalTupleElements1.ts, 0, 36))
+
+type T3 = [number, string?, boolean?];
+>T3 : Symbol(T3, Decl(optionalTupleElements1.ts, 1, 37))
+
+type T4 = [number?, string?, boolean?];
+>T4 : Symbol(T4, Decl(optionalTupleElements1.ts, 2, 38))
+
+type L1 = T1["length"];
+>L1 : Symbol(L1, Decl(optionalTupleElements1.ts, 3, 39))
+>T1 : Symbol(T1, Decl(optionalTupleElements1.ts, 0, 0))
+
+type L2 = T2["length"];
+>L2 : Symbol(L2, Decl(optionalTupleElements1.ts, 5, 23))
+>T2 : Symbol(T2, Decl(optionalTupleElements1.ts, 0, 36))
+
+type L3 = T3["length"];
+>L3 : Symbol(L3, Decl(optionalTupleElements1.ts, 6, 23))
+>T3 : Symbol(T3, Decl(optionalTupleElements1.ts, 1, 37))
+
+type L4 = T4["length"];
+>L4 : Symbol(L4, Decl(optionalTupleElements1.ts, 7, 23))
+>T4 : Symbol(T4, Decl(optionalTupleElements1.ts, 2, 38))
+
+function f1(t1: T1, t2: T2, t3: T3, t4: T4) {
+>f1 : Symbol(f1, Decl(optionalTupleElements1.ts, 8, 23))
+>t1 : Symbol(t1, Decl(optionalTupleElements1.ts, 10, 12))
+>T1 : Symbol(T1, Decl(optionalTupleElements1.ts, 0, 0))
+>t2 : Symbol(t2, Decl(optionalTupleElements1.ts, 10, 19))
+>T2 : Symbol(T2, Decl(optionalTupleElements1.ts, 0, 36))
+>t3 : Symbol(t3, Decl(optionalTupleElements1.ts, 10, 27))
+>T3 : Symbol(T3, Decl(optionalTupleElements1.ts, 1, 37))
+>t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 10, 35))
+>T4 : Symbol(T4, Decl(optionalTupleElements1.ts, 2, 38))
+
+    t1 = t1;
+>t1 : Symbol(t1, Decl(optionalTupleElements1.ts, 10, 12))
+>t1 : Symbol(t1, Decl(optionalTupleElements1.ts, 10, 12))
+
+    t1 = t2;  // Error
+>t1 : Symbol(t1, Decl(optionalTupleElements1.ts, 10, 12))
+>t2 : Symbol(t2, Decl(optionalTupleElements1.ts, 10, 19))
+
+    t1 = t3;  // Error
+>t1 : Symbol(t1, Decl(optionalTupleElements1.ts, 10, 12))
+>t3 : Symbol(t3, Decl(optionalTupleElements1.ts, 10, 27))
+
+    t1 = t4;  // Error
+>t1 : Symbol(t1, Decl(optionalTupleElements1.ts, 10, 12))
+>t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 10, 35))
+
+    t2 = t1;
+>t2 : Symbol(t2, Decl(optionalTupleElements1.ts, 10, 19))
+>t1 : Symbol(t1, Decl(optionalTupleElements1.ts, 10, 12))
+
+    t2 = t2;
+>t2 : Symbol(t2, Decl(optionalTupleElements1.ts, 10, 19))
+>t2 : Symbol(t2, Decl(optionalTupleElements1.ts, 10, 19))
+
+    t2 = t3;  // Error
+>t2 : Symbol(t2, Decl(optionalTupleElements1.ts, 10, 19))
+>t3 : Symbol(t3, Decl(optionalTupleElements1.ts, 10, 27))
+
+    t2 = t4;  // Error
+>t2 : Symbol(t2, Decl(optionalTupleElements1.ts, 10, 19))
+>t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 10, 35))
+
+    t3 = t1;
+>t3 : Symbol(t3, Decl(optionalTupleElements1.ts, 10, 27))
+>t1 : Symbol(t1, Decl(optionalTupleElements1.ts, 10, 12))
+
+    t3 = t2;
+>t3 : Symbol(t3, Decl(optionalTupleElements1.ts, 10, 27))
+>t2 : Symbol(t2, Decl(optionalTupleElements1.ts, 10, 19))
+
+    t3 = t3;
+>t3 : Symbol(t3, Decl(optionalTupleElements1.ts, 10, 27))
+>t3 : Symbol(t3, Decl(optionalTupleElements1.ts, 10, 27))
+
+    t3 = t4;  // Error
+>t3 : Symbol(t3, Decl(optionalTupleElements1.ts, 10, 27))
+>t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 10, 35))
+
+    t4 = t1;
+>t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 10, 35))
+>t1 : Symbol(t1, Decl(optionalTupleElements1.ts, 10, 12))
+
+    t4 = t2;
+>t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 10, 35))
+>t2 : Symbol(t2, Decl(optionalTupleElements1.ts, 10, 19))
+
+    t4 = t3;
+>t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 10, 35))
+>t3 : Symbol(t3, Decl(optionalTupleElements1.ts, 10, 27))
+
+    t4 = t4;
+>t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 10, 35))
+>t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 10, 35))
+}
+
+type T5 = [number, string?, boolean];
+>T5 : Symbol(T5, Decl(optionalTupleElements1.ts, 27, 1))
+
+type L5 = T5["length"];
+>L5 : Symbol(L5, Decl(optionalTupleElements1.ts, 29, 37))
+>T5 : Symbol(T5, Decl(optionalTupleElements1.ts, 27, 1))
+
+function f2(t1: T1, t2: T2, t3: T3, t4: T4, t5: T5) {
+>f2 : Symbol(f2, Decl(optionalTupleElements1.ts, 30, 23))
+>t1 : Symbol(t1, Decl(optionalTupleElements1.ts, 32, 12))
+>T1 : Symbol(T1, Decl(optionalTupleElements1.ts, 0, 0))
+>t2 : Symbol(t2, Decl(optionalTupleElements1.ts, 32, 19))
+>T2 : Symbol(T2, Decl(optionalTupleElements1.ts, 0, 36))
+>t3 : Symbol(t3, Decl(optionalTupleElements1.ts, 32, 27))
+>T3 : Symbol(T3, Decl(optionalTupleElements1.ts, 1, 37))
+>t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 32, 35))
+>T4 : Symbol(T4, Decl(optionalTupleElements1.ts, 2, 38))
+>t5 : Symbol(t5, Decl(optionalTupleElements1.ts, 32, 43))
+>T5 : Symbol(T5, Decl(optionalTupleElements1.ts, 27, 1))
+
+    t1 = t5;  // Error
+>t1 : Symbol(t1, Decl(optionalTupleElements1.ts, 32, 12))
+>t5 : Symbol(t5, Decl(optionalTupleElements1.ts, 32, 43))
+
+    t2 = t5;  // Error
+>t2 : Symbol(t2, Decl(optionalTupleElements1.ts, 32, 19))
+>t5 : Symbol(t5, Decl(optionalTupleElements1.ts, 32, 43))
+
+    t3 = t5;
+>t3 : Symbol(t3, Decl(optionalTupleElements1.ts, 32, 27))
+>t5 : Symbol(t5, Decl(optionalTupleElements1.ts, 32, 43))
+
+    t4 = t5;
+>t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 32, 35))
+>t5 : Symbol(t5, Decl(optionalTupleElements1.ts, 32, 43))
+
+    t5 = t5;
+>t5 : Symbol(t5, Decl(optionalTupleElements1.ts, 32, 43))
+>t5 : Symbol(t5, Decl(optionalTupleElements1.ts, 32, 43))
+
+    t5 = t1;
+>t5 : Symbol(t5, Decl(optionalTupleElements1.ts, 32, 43))
+>t1 : Symbol(t1, Decl(optionalTupleElements1.ts, 32, 12))
+
+    t5 = t2;  // Error
+>t5 : Symbol(t5, Decl(optionalTupleElements1.ts, 32, 43))
+>t2 : Symbol(t2, Decl(optionalTupleElements1.ts, 32, 19))
+
+    t5 = t3;  // Error
+>t5 : Symbol(t5, Decl(optionalTupleElements1.ts, 32, 43))
+>t3 : Symbol(t3, Decl(optionalTupleElements1.ts, 32, 27))
+
+    t5 = t4;  // Error
+>t5 : Symbol(t5, Decl(optionalTupleElements1.ts, 32, 43))
+>t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 32, 35))
+
+    t5 = t5;
+>t5 : Symbol(t5, Decl(optionalTupleElements1.ts, 32, 43))
+>t5 : Symbol(t5, Decl(optionalTupleElements1.ts, 32, 43))
+}
+
+let t2: T2;
+>t2 : Symbol(t2, Decl(optionalTupleElements1.ts, 45, 3))
+>T2 : Symbol(T2, Decl(optionalTupleElements1.ts, 0, 36))
+
+let t3: T3;
+>t3 : Symbol(t3, Decl(optionalTupleElements1.ts, 46, 3))
+>T3 : Symbol(T3, Decl(optionalTupleElements1.ts, 1, 37))
+
+let t4: T4;
+>t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 47, 3))
+>T4 : Symbol(T4, Decl(optionalTupleElements1.ts, 2, 38))
+
+let t5: T5;
+>t5 : Symbol(t5, Decl(optionalTupleElements1.ts, 48, 3))
+>T5 : Symbol(T5, Decl(optionalTupleElements1.ts, 27, 1))
+
+t2 = [42, "hello"];
+>t2 : Symbol(t2, Decl(optionalTupleElements1.ts, 45, 3))
+
+t3 = [42, "hello"];
+>t3 : Symbol(t3, Decl(optionalTupleElements1.ts, 46, 3))
+
+t3 = [42,,true]
+>t3 : Symbol(t3, Decl(optionalTupleElements1.ts, 46, 3))
+
+t3 = [42];
+>t3 : Symbol(t3, Decl(optionalTupleElements1.ts, 46, 3))
+
+t4 = [42, "hello"];
+>t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 47, 3))
+
+t4 = [42,,true];
+>t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 47, 3))
+
+t4 = [,"hello", true];
+>t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 47, 3))
+
+t4 = [,,true];
+>t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 47, 3))
+
+t4 = [];
+>t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 47, 3))
+
+t5 = [42,,true];
+>t5 : Symbol(t5, Decl(optionalTupleElements1.ts, 48, 3))
+
diff --git a/tests/baselines/reference/optionalTupleElements1.types b/tests/baselines/reference/optionalTupleElements1.types
new file mode 100644
index 0000000000000..5cbe036b052c4
--- /dev/null
+++ b/tests/baselines/reference/optionalTupleElements1.types
@@ -0,0 +1,280 @@
+=== tests/cases/conformance/types/tuple/optionalTupleElements1.ts ===
+type T1 = [number, string, boolean];
+>T1 : [number, string, boolean]
+
+type T2 = [number, string, boolean?];
+>T2 : [number, string, (boolean | undefined)?]
+
+type T3 = [number, string?, boolean?];
+>T3 : [number, (string | undefined)?, (boolean | undefined)?]
+
+type T4 = [number?, string?, boolean?];
+>T4 : [(number | undefined)?, (string | undefined)?, (boolean | undefined)?]
+
+type L1 = T1["length"];
+>L1 : 3
+>T1 : [number, string, boolean]
+
+type L2 = T2["length"];
+>L2 : 3 | 2
+>T2 : [number, string, (boolean | undefined)?]
+
+type L3 = T3["length"];
+>L3 : 3 | 2 | 1
+>T3 : [number, (string | undefined)?, (boolean | undefined)?]
+
+type L4 = T4["length"];
+>L4 : 0 | 3 | 2 | 1
+>T4 : [(number | undefined)?, (string | undefined)?, (boolean | undefined)?]
+
+function f1(t1: T1, t2: T2, t3: T3, t4: T4) {
+>f1 : (t1: [number, string, boolean], t2: [number, string, (boolean | undefined)?], t3: [number, (string | undefined)?, (boolean | undefined)?], t4: [(number | undefined)?, (string | undefined)?, (boolean | undefined)?]) => void
+>t1 : [number, string, boolean]
+>T1 : [number, string, boolean]
+>t2 : [number, string, (boolean | undefined)?]
+>T2 : [number, string, (boolean | undefined)?]
+>t3 : [number, (string | undefined)?, (boolean | undefined)?]
+>T3 : [number, (string | undefined)?, (boolean | undefined)?]
+>t4 : [(number | undefined)?, (string | undefined)?, (boolean | undefined)?]
+>T4 : [(number | undefined)?, (string | undefined)?, (boolean | undefined)?]
+
+    t1 = t1;
+>t1 = t1 : [number, string, boolean]
+>t1 : [number, string, boolean]
+>t1 : [number, string, boolean]
+
+    t1 = t2;  // Error
+>t1 = t2 : [number, string, (boolean | undefined)?]
+>t1 : [number, string, boolean]
+>t2 : [number, string, (boolean | undefined)?]
+
+    t1 = t3;  // Error
+>t1 = t3 : [number, (string | undefined)?, (boolean | undefined)?]
+>t1 : [number, string, boolean]
+>t3 : [number, (string | undefined)?, (boolean | undefined)?]
+
+    t1 = t4;  // Error
+>t1 = t4 : [(number | undefined)?, (string | undefined)?, (boolean | undefined)?]
+>t1 : [number, string, boolean]
+>t4 : [(number | undefined)?, (string | undefined)?, (boolean | undefined)?]
+
+    t2 = t1;
+>t2 = t1 : [number, string, boolean]
+>t2 : [number, string, (boolean | undefined)?]
+>t1 : [number, string, boolean]
+
+    t2 = t2;
+>t2 = t2 : [number, string, (boolean | undefined)?]
+>t2 : [number, string, (boolean | undefined)?]
+>t2 : [number, string, (boolean | undefined)?]
+
+    t2 = t3;  // Error
+>t2 = t3 : [number, (string | undefined)?, (boolean | undefined)?]
+>t2 : [number, string, (boolean | undefined)?]
+>t3 : [number, (string | undefined)?, (boolean | undefined)?]
+
+    t2 = t4;  // Error
+>t2 = t4 : [(number | undefined)?, (string | undefined)?, (boolean | undefined)?]
+>t2 : [number, string, (boolean | undefined)?]
+>t4 : [(number | undefined)?, (string | undefined)?, (boolean | undefined)?]
+
+    t3 = t1;
+>t3 = t1 : [number, string, boolean]
+>t3 : [number, (string | undefined)?, (boolean | undefined)?]
+>t1 : [number, string, boolean]
+
+    t3 = t2;
+>t3 = t2 : [number, string, (boolean | undefined)?]
+>t3 : [number, (string | undefined)?, (boolean | undefined)?]
+>t2 : [number, string, (boolean | undefined)?]
+
+    t3 = t3;
+>t3 = t3 : [number, (string | undefined)?, (boolean | undefined)?]
+>t3 : [number, (string | undefined)?, (boolean | undefined)?]
+>t3 : [number, (string | undefined)?, (boolean | undefined)?]
+
+    t3 = t4;  // Error
+>t3 = t4 : [(number | undefined)?, (string | undefined)?, (boolean | undefined)?]
+>t3 : [number, (string | undefined)?, (boolean | undefined)?]
+>t4 : [(number | undefined)?, (string | undefined)?, (boolean | undefined)?]
+
+    t4 = t1;
+>t4 = t1 : [number, string, boolean]
+>t4 : [(number | undefined)?, (string | undefined)?, (boolean | undefined)?]
+>t1 : [number, string, boolean]
+
+    t4 = t2;
+>t4 = t2 : [number, string, (boolean | undefined)?]
+>t4 : [(number | undefined)?, (string | undefined)?, (boolean | undefined)?]
+>t2 : [number, string, (boolean | undefined)?]
+
+    t4 = t3;
+>t4 = t3 : [number, (string | undefined)?, (boolean | undefined)?]
+>t4 : [(number | undefined)?, (string | undefined)?, (boolean | undefined)?]
+>t3 : [number, (string | undefined)?, (boolean | undefined)?]
+
+    t4 = t4;
+>t4 = t4 : [(number | undefined)?, (string | undefined)?, (boolean | undefined)?]
+>t4 : [(number | undefined)?, (string | undefined)?, (boolean | undefined)?]
+>t4 : [(number | undefined)?, (string | undefined)?, (boolean | undefined)?]
+}
+
+type T5 = [number, string?, boolean];
+>T5 : [number, string | undefined, boolean]
+
+type L5 = T5["length"];
+>L5 : 3
+>T5 : [number, string | undefined, boolean]
+
+function f2(t1: T1, t2: T2, t3: T3, t4: T4, t5: T5) {
+>f2 : (t1: [number, string, boolean], t2: [number, string, (boolean | undefined)?], t3: [number, (string | undefined)?, (boolean | undefined)?], t4: [(number | undefined)?, (string | undefined)?, (boolean | undefined)?], t5: [number, string | undefined, boolean]) => void
+>t1 : [number, string, boolean]
+>T1 : [number, string, boolean]
+>t2 : [number, string, (boolean | undefined)?]
+>T2 : [number, string, (boolean | undefined)?]
+>t3 : [number, (string | undefined)?, (boolean | undefined)?]
+>T3 : [number, (string | undefined)?, (boolean | undefined)?]
+>t4 : [(number | undefined)?, (string | undefined)?, (boolean | undefined)?]
+>T4 : [(number | undefined)?, (string | undefined)?, (boolean | undefined)?]
+>t5 : [number, string | undefined, boolean]
+>T5 : [number, string | undefined, boolean]
+
+    t1 = t5;  // Error
+>t1 = t5 : [number, string | undefined, boolean]
+>t1 : [number, string, boolean]
+>t5 : [number, string | undefined, boolean]
+
+    t2 = t5;  // Error
+>t2 = t5 : [number, string | undefined, boolean]
+>t2 : [number, string, (boolean | undefined)?]
+>t5 : [number, string | undefined, boolean]
+
+    t3 = t5;
+>t3 = t5 : [number, string | undefined, boolean]
+>t3 : [number, (string | undefined)?, (boolean | undefined)?]
+>t5 : [number, string | undefined, boolean]
+
+    t4 = t5;
+>t4 = t5 : [number, string | undefined, boolean]
+>t4 : [(number | undefined)?, (string | undefined)?, (boolean | undefined)?]
+>t5 : [number, string | undefined, boolean]
+
+    t5 = t5;
+>t5 = t5 : [number, string | undefined, boolean]
+>t5 : [number, string | undefined, boolean]
+>t5 : [number, string | undefined, boolean]
+
+    t5 = t1;
+>t5 = t1 : [number, string, boolean]
+>t5 : [number, string | undefined, boolean]
+>t1 : [number, string, boolean]
+
+    t5 = t2;  // Error
+>t5 = t2 : [number, string, (boolean | undefined)?]
+>t5 : [number, string | undefined, boolean]
+>t2 : [number, string, (boolean | undefined)?]
+
+    t5 = t3;  // Error
+>t5 = t3 : [number, (string | undefined)?, (boolean | undefined)?]
+>t5 : [number, string | undefined, boolean]
+>t3 : [number, (string | undefined)?, (boolean | undefined)?]
+
+    t5 = t4;  // Error
+>t5 = t4 : [(number | undefined)?, (string | undefined)?, (boolean | undefined)?]
+>t5 : [number, string | undefined, boolean]
+>t4 : [(number | undefined)?, (string | undefined)?, (boolean | undefined)?]
+
+    t5 = t5;
+>t5 = t5 : [number, string | undefined, boolean]
+>t5 : [number, string | undefined, boolean]
+>t5 : [number, string | undefined, boolean]
+}
+
+let t2: T2;
+>t2 : [number, string, (boolean | undefined)?]
+>T2 : [number, string, (boolean | undefined)?]
+
+let t3: T3;
+>t3 : [number, (string | undefined)?, (boolean | undefined)?]
+>T3 : [number, (string | undefined)?, (boolean | undefined)?]
+
+let t4: T4;
+>t4 : [(number | undefined)?, (string | undefined)?, (boolean | undefined)?]
+>T4 : [(number | undefined)?, (string | undefined)?, (boolean | undefined)?]
+
+let t5: T5;
+>t5 : [number, string | undefined, boolean]
+>T5 : [number, string | undefined, boolean]
+
+t2 = [42, "hello"];
+>t2 = [42, "hello"] : [number, string]
+>t2 : [number, string, (boolean | undefined)?]
+>[42, "hello"] : [number, string]
+>42 : 42
+>"hello" : "hello"
+
+t3 = [42, "hello"];
+>t3 = [42, "hello"] : [number, string]
+>t3 : [number, (string | undefined)?, (boolean | undefined)?]
+>[42, "hello"] : [number, string]
+>42 : 42
+>"hello" : "hello"
+
+t3 = [42,,true]
+>t3 = [42,,true] : [number, undefined, true]
+>t3 : [number, (string | undefined)?, (boolean | undefined)?]
+>[42,,true] : [number, undefined, true]
+>42 : 42
+> : undefined
+>true : true
+
+t3 = [42];
+>t3 = [42] : [number]
+>t3 : [number, (string | undefined)?, (boolean | undefined)?]
+>[42] : [number]
+>42 : 42
+
+t4 = [42, "hello"];
+>t4 = [42, "hello"] : [number, string]
+>t4 : [(number | undefined)?, (string | undefined)?, (boolean | undefined)?]
+>[42, "hello"] : [number, string]
+>42 : 42
+>"hello" : "hello"
+
+t4 = [42,,true];
+>t4 = [42,,true] : [number, undefined, true]
+>t4 : [(number | undefined)?, (string | undefined)?, (boolean | undefined)?]
+>[42,,true] : [number, undefined, true]
+>42 : 42
+> : undefined
+>true : true
+
+t4 = [,"hello", true];
+>t4 = [,"hello", true] : [undefined, string, true]
+>t4 : [(number | undefined)?, (string | undefined)?, (boolean | undefined)?]
+>[,"hello", true] : [undefined, string, true]
+> : undefined
+>"hello" : "hello"
+>true : true
+
+t4 = [,,true];
+>t4 = [,,true] : [undefined, undefined, true]
+>t4 : [(number | undefined)?, (string | undefined)?, (boolean | undefined)?]
+>[,,true] : [undefined, undefined, true]
+> : undefined
+> : undefined
+>true : true
+
+t4 = [];
+>t4 = [] : []
+>t4 : [(number | undefined)?, (string | undefined)?, (boolean | undefined)?]
+>[] : []
+
+t5 = [42,,true];
+>t5 = [42,,true] : [number, undefined, true]
+>t5 : [number, string | undefined, boolean]
+>[42,,true] : [number, undefined, true]
+>42 : 42
+> : undefined
+>true : true
+

From f1efd1d0430443191a0ee36087b8c3b5aec4c6ba Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Fri, 15 Jun 2018 11:43:16 -0700
Subject: [PATCH 19/37] Parsing and rudimentary checking of tuples with rest
 elements

---
 src/compiler/binder.ts          |  1 +
 src/compiler/checker.ts         | 89 ++++++++++++++++++++++++++-------
 src/compiler/emitter.ts         |  5 +-
 src/compiler/factory.ts         | 12 +++++
 src/compiler/transformers/ts.ts |  1 +
 src/compiler/visitor.ts         |  4 ++
 src/parser/parser.ts            |  9 +++-
 src/parser/types.ts             |  7 +++
 8 files changed, 107 insertions(+), 21 deletions(-)

diff --git a/src/compiler/binder.ts b/src/compiler/binder.ts
index 3c8f91970bc4a..96805be23bf0c 100644
--- a/src/compiler/binder.ts
+++ b/src/compiler/binder.ts
@@ -3602,6 +3602,7 @@ namespace ts {
             case SyntaxKind.ArrayType:
             case SyntaxKind.TupleType:
             case SyntaxKind.OptionalType:
+            case SyntaxKind.RestType:
             case SyntaxKind.UnionType:
             case SyntaxKind.IntersectionType:
             case SyntaxKind.ConditionalType:
diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index e13aefc4c0369..c011c77f5ecf6 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -3400,9 +3400,12 @@ namespace ts {
                         if (typeArguments.length > 0) {
                             const arity = getTypeReferenceArity(type);
                             const tupleConstituentNodes = mapToTypeNodes(typeArguments.slice(0, arity), context);
+                            const hasRestElement = (<TupleType>type.target).hasRestElement;
                             if (tupleConstituentNodes && tupleConstituentNodes.length > 0) {
                                 for (let i = (<TupleType>type.target).minLength; i < arity; i++) {
-                                    tupleConstituentNodes[i] = createOptionalTypeNode(tupleConstituentNodes[i]);
+                                    tupleConstituentNodes[i] = hasRestElement && i === arity - 1 ?
+                                        createRestTypeNode(createArrayTypeNode(tupleConstituentNodes[i])) :
+                                        createOptionalTypeNode(tupleConstituentNodes[i]);
                                 }
                                 return createTupleTypeNode(tupleConstituentNodes);
                             }
@@ -4842,7 +4845,7 @@ namespace ts {
             }
             // If the pattern has at least one element, and no rest element, then it should imply a tuple type.
             const elementTypes = map(elements, e => isOmittedExpression(e) ? anyType : getTypeFromBindingElement(e, includePatternInType, reportErrors));
-            let result = createTupleType(elementTypes);
+            let result = <TypeReference>createTupleType(elementTypes);
             if (includePatternInType) {
                 result = cloneTypeReference(result);
                 result.pattern = pattern;
@@ -8282,21 +8285,25 @@ namespace ts {
         //
         // Note that the generic type created by this function has no symbol associated with it. The same
         // is true for each of the synthesized type parameters.
-        function createTupleTypeOfArity(arity: number, minLength: number, associatedNames: __String[] | undefined): TupleType {
+        function createTupleTypeOfArity(arity: number, minLength: number, hasRestElement: boolean, associatedNames: __String[] | undefined): TupleType {
             let typeParameters: TypeParameter[] | undefined;
             const properties: Symbol[] = [];
+            const maxLength = hasRestElement ? arity - 1 : arity;
             if (arity) {
                 typeParameters = new Array(arity);
                 for (let i = 0; i < arity; i++) {
-                    const property = createSymbol(SymbolFlags.Property | (i >= minLength ? SymbolFlags.Optional : 0), "" + i as __String);
-                    property.type = typeParameters[i] = <TypeParameter>createType(TypeFlags.TypeParameter);
-                    properties.push(property);
+                    const typeParameter = typeParameters[i] = <TypeParameter>createType(TypeFlags.TypeParameter);
+                    if (i < maxLength) {
+                        const property = createSymbol(SymbolFlags.Property | (i >= minLength ? SymbolFlags.Optional : 0), "" + i as __String);
+                        property.type = typeParameter;
+                        properties.push(property);
+                    }
                 }
             }
             const literalTypes = [];
-            for (let i = minLength; i <= arity; i++) literalTypes.push(getLiteralType(i));
+            for (let i = minLength; i <= maxLength; i++) literalTypes.push(getLiteralType(i));
             const lengthSymbol = createSymbol(SymbolFlags.Property, "length" as __String);
-            lengthSymbol.type = getUnionType(literalTypes);
+            lengthSymbol.type = hasRestElement ? numberType : getUnionType(literalTypes);
             properties.push(lengthSymbol);
             const type = <TupleType & InterfaceTypeWithDeclaredMembers>createObjectType(ObjectFlags.Tuple | ObjectFlags.Reference);
             type.typeParameters = typeParameters;
@@ -8315,29 +8322,40 @@ namespace ts {
             type.declaredStringIndexInfo = undefined;
             type.declaredNumberIndexInfo = undefined;
             type.minLength = minLength;
+            type.hasRestElement = hasRestElement;
             type.associatedNames = associatedNames;
             return type;
         }
 
-        function getTupleTypeOfArity(arity: number, minLength: number, associatedNames?: __String[]): GenericType {
-            const key = arity + "," + minLength + (associatedNames && associatedNames.length ? "," + associatedNames.join(",") : "");
+        function getTupleTypeOfArity(arity: number, minLength: number, hasRestElement: boolean, associatedNames?: __String[]): GenericType {
+            const key = arity + (hasRestElement ? "+" : ",") + minLength + (associatedNames && associatedNames.length ? "," + associatedNames.join(",") : "");
             let type = tupleTypes.get(key);
             if (!type) {
-                tupleTypes.set(key, type = createTupleTypeOfArity(arity, minLength, associatedNames));
+                tupleTypes.set(key, type = createTupleTypeOfArity(arity, minLength, hasRestElement, associatedNames));
             }
             return type;
         }
 
-        function createTupleType(elementTypes: Type[], minLength = elementTypes.length, associatedNames?: __String[]) {
-            const tupleType = getTupleTypeOfArity(elementTypes.length, minLength, associatedNames);
+        function createTupleType(elementTypes: Type[], minLength = elementTypes.length, hasRestElement = false, associatedNames?: __String[]) {
+            const arity = elementTypes.length;
+            if (arity === 1 && hasRestElement) {
+                return createArrayType(elementTypes[0]);
+            }
+            const tupleType = getTupleTypeOfArity(arity, minLength, arity > 0 && hasRestElement, associatedNames);
             return elementTypes.length ? createTypeReference(tupleType, elementTypes) : tupleType;
         }
 
         function getTypeFromTupleTypeNode(node: TupleTypeNode): Type {
             const links = getNodeLinks(node);
             if (!links.resolvedType) {
-                const minLength = findLastIndex(node.elementTypes, n => n.kind !== SyntaxKind.OptionalType) + 1;
-                links.resolvedType = createTupleType(map(node.elementTypes, getTypeFromTypeNode), minLength);
+                const lastElement = lastOrUndefined(node.elementTypes);
+                const restElement = lastElement && lastElement.kind === SyntaxKind.RestType ? lastElement : undefined;
+                const minLength = findLastIndex(node.elementTypes, n => n.kind !== SyntaxKind.OptionalType && n !== restElement) + 1;
+                const elementTypes = map(node.elementTypes, n => {
+                    const type = getTypeFromTypeNode(n);
+                    return n === restElement ? getIndexTypeOfType(type, IndexKind.Number) || errorType : type;
+                });
+                links.resolvedType = createTupleType(elementTypes, minLength, !!restElement);
             }
             return links.resolvedType;
         }
@@ -9548,9 +9566,10 @@ namespace ts {
                 case SyntaxKind.JSDocOptionalType:
                     return addOptionality(getTypeFromTypeNode((node as JSDocOptionalType).type));
                 case SyntaxKind.ParenthesizedType:
+                case SyntaxKind.RestType:
                 case SyntaxKind.JSDocNonNullableType:
                 case SyntaxKind.JSDocTypeExpression:
-                    return getTypeFromTypeNode((<ParenthesizedTypeNode | JSDocTypeReferencingNode | JSDocTypeExpression>node).type);
+                    return getTypeFromTypeNode((<ParenthesizedTypeNode | RestTypeNode | JSDocTypeReferencingNode | JSDocTypeExpression>node).type);
                 case SyntaxKind.JSDocVariadicType:
                     return getTypeFromJSDocVariadicType(node as JSDocVariadicType);
                 case SyntaxKind.FunctionType:
@@ -11346,6 +11365,35 @@ namespace ts {
                         }
                     }
                 }
+                if (isTupleType(target)) {
+                    const targetRestType = getRestTypeOfTupleType(<TypeReference>target);
+                    if (targetRestType) {
+                        if (!isTupleType(source)) {
+                            return Ternary.False;
+                        }
+                        const sourceRestType = getRestTypeOfTupleType(<TypeReference>source);
+                        if (sourceRestType && !isRelatedTo(sourceRestType, targetRestType, reportErrors)) {
+                            if (reportErrors) {
+                                // !!! Rest element types are incompatible
+                                reportError(Diagnostics.Index_signatures_are_incompatible);
+                            }
+                            return Ternary.False;
+                        }
+                        const targetCount = getTypeReferenceArity(<TypeReference>target) - 1;
+                        const sourceCount = getTypeReferenceArity(<TypeReference>source) - (sourceRestType ? 1 : 0);
+                        for (let i = targetCount; i < sourceCount; i++) {
+                            const related = isRelatedTo((<TypeReference>source).typeArguments![i], targetRestType, reportErrors);
+                            if (!related) {
+                                if (reportErrors) {
+                                    // !!! Property {0} is incompatible with rest element type
+                                    reportError(Diagnostics.Property_0_is_incompatible_with_index_signature, "" + i);
+                                }
+                                return Ternary.False;
+                            }
+                            result &= related;
+                        }
+                    }
+                }
                 return result;
             }
 
@@ -12028,6 +12076,10 @@ namespace ts {
             return !!(getObjectFlags(type) & ObjectFlags.Reference && (<TypeReference>type).target.objectFlags & ObjectFlags.Tuple);
         }
 
+        function getRestTypeOfTupleType(type: TypeReference) {
+            return (<TupleType>type.target).hasRestElement ? type.typeArguments![type.target.typeParameters!.length - 1] : undefined;
+        }
+
         function getFalsyFlagsOfTypes(types: Type[]): TypeFlags {
             let result: TypeFlags = 0;
             for (const t of types) {
@@ -12400,7 +12452,7 @@ namespace ts {
                     }
                     const minArgumentCount = getMinArgumentCount(source);
                     const minLength = minArgumentCount < paramCount ? 0 : minArgumentCount - paramCount;
-                    const rest = sourceHasRest ? createArrayType(getUnionType(types)) : createTupleType(types, minLength, names);
+                    const rest = sourceHasRest ? createArrayType(getUnionType(types)) : createTupleType(types, minLength, /*hasRestElement*/ false, names);
                     callback(rest, targetRestTypeVariable);
                 }
             }
@@ -15899,7 +15951,7 @@ namespace ts {
                 // If array literal is actually a destructuring pattern, mark it as an implied type. We do this such
                 // that we get the same behavior for "var [x, y] = []" and "[x, y] = []".
                 if (inDestructuringPattern && elementTypes.length) {
-                    const type = cloneTypeReference(createTupleType(elementTypes));
+                    const type = cloneTypeReference(<TypeReference>createTupleType(elementTypes));
                     type.pattern = node;
                     return type;
                 }
@@ -25639,6 +25691,7 @@ namespace ts {
                     return checkUnionOrIntersectionType(<UnionOrIntersectionTypeNode>node);
                 case SyntaxKind.ParenthesizedType:
                 case SyntaxKind.OptionalType:
+                case SyntaxKind.RestType:
                     return checkSourceElement((<ParenthesizedTypeNode | OptionalTypeNode>node).type);
                 case SyntaxKind.TypeOperator:
                     return checkTypeOperator(<TypeOperatorNode>node);
diff --git a/src/compiler/emitter.ts b/src/compiler/emitter.ts
index edf3c457f877b..904972b52f34a 100644
--- a/src/compiler/emitter.ts
+++ b/src/compiler/emitter.ts
@@ -678,8 +678,9 @@ namespace ts {
                         return emitJSDocNonNullableType(node as JSDocNonNullableType);
                     case SyntaxKind.JSDocOptionalType:
                         return emitJSDocOptionalType(node as JSDocOptionalType);
+                    case SyntaxKind.RestType:
                     case SyntaxKind.JSDocVariadicType:
-                        return emitJSDocVariadicType(node as JSDocVariadicType);
+                        return emitRestOrJSDocVariadicType(node as RestTypeNode | JSDocVariadicType);
 
                     // Binding patterns
                     case SyntaxKind.ObjectBindingPattern:
@@ -1287,7 +1288,7 @@ namespace ts {
             writePunctuation("]");
         }
 
-        function emitJSDocVariadicType(node: JSDocVariadicType) {
+        function emitRestOrJSDocVariadicType(node: RestTypeNode | JSDocVariadicType) {
             write("...");
             emit(node.type);
         }
diff --git a/src/compiler/factory.ts b/src/compiler/factory.ts
index b861d1c18c3d7..95fe9d8a327f0 100644
--- a/src/compiler/factory.ts
+++ b/src/compiler/factory.ts
@@ -763,6 +763,18 @@ namespace ts {
             : node;
     }
 
+    export function createRestTypeNode(type: TypeNode) {
+        const node = createSynthesizedNode(SyntaxKind.RestType) as RestTypeNode;
+        node.type = type;
+        return node;
+    }
+
+    export function updateRestTypeNode(node: RestTypeNode, type: TypeNode): RestTypeNode {
+        return node.type !== type
+            ? updateNode(createRestTypeNode(type), node)
+            : node;
+    }
+
     export function createUnionTypeNode(types: ReadonlyArray<TypeNode>): UnionTypeNode {
         return <UnionTypeNode>createUnionOrIntersectionTypeNode(SyntaxKind.UnionType, types);
     }
diff --git a/src/compiler/transformers/ts.ts b/src/compiler/transformers/ts.ts
index 218eb95b6191a..1cb2942a51941 100644
--- a/src/compiler/transformers/ts.ts
+++ b/src/compiler/transformers/ts.ts
@@ -381,6 +381,7 @@ namespace ts {
                 case SyntaxKind.ArrayType:
                 case SyntaxKind.TupleType:
                 case SyntaxKind.OptionalType:
+                case SyntaxKind.RestType:
                 case SyntaxKind.TypeLiteral:
                 case SyntaxKind.TypePredicate:
                 case SyntaxKind.TypeParameter:
diff --git a/src/compiler/visitor.ts b/src/compiler/visitor.ts
index 6c7ae614ac8fd..886d3be337a12 100644
--- a/src/compiler/visitor.ts
+++ b/src/compiler/visitor.ts
@@ -379,6 +379,10 @@ namespace ts {
                 return updateOptionalTypeNode((<OptionalTypeNode>node),
                     visitNode((<OptionalTypeNode>node).type, visitor, isTypeNode));
 
+            case SyntaxKind.RestType:
+                return updateRestTypeNode((<RestTypeNode>node),
+                    visitNode((<RestTypeNode>node).type, visitor, isTypeNode));
+
             case SyntaxKind.UnionType:
                 return updateUnionTypeNode(<UnionTypeNode>node,
                     nodesVisitor((<UnionTypeNode>node).types, visitor, isTypeNode));
diff --git a/src/parser/parser.ts b/src/parser/parser.ts
index fad37c233dc7d..460464b046565 100644
--- a/src/parser/parser.ts
+++ b/src/parser/parser.ts
@@ -446,12 +446,13 @@ namespace ts {
                 return visitNode(cbNode, (<JsxClosingElement>node).tagName);
 
             case SyntaxKind.OptionalType:
+            case SyntaxKind.RestType:
             case SyntaxKind.JSDocTypeExpression:
             case SyntaxKind.JSDocNonNullableType:
             case SyntaxKind.JSDocNullableType:
             case SyntaxKind.JSDocOptionalType:
             case SyntaxKind.JSDocVariadicType:
-                return visitNode(cbNode, (<OptionalTypeNode | JSDocTypeExpression | JSDocTypeReferencingNode>node).type);
+                return visitNode(cbNode, (<OptionalTypeNode | RestTypeNode | JSDocTypeExpression | JSDocTypeReferencingNode>node).type);
             case SyntaxKind.JSDocFunctionType:
                 return visitNodes(cbNode, cbNodes, (<JSDocFunctionType>node).parameters) ||
                     visitNode(cbNode, (<JSDocFunctionType>node).type);
@@ -2775,6 +2776,12 @@ namespace ts {
         }
 
         function parseTupleElementType() {
+            const pos = getNodePos();
+            if (parseOptional(SyntaxKind.DotDotDotToken)) {
+                const node = <RestTypeNode>createNode(SyntaxKind.RestType, pos);
+                node.type = parseType();
+                return finishNode(node);
+            }
             const type = parseType();
             if (!(contextFlags & NodeFlags.JSDoc) && type.kind === SyntaxKind.JSDocNullableType && type.pos === (<JSDocNullableType>type).type.pos) {
                 type.kind = SyntaxKind.OptionalType;
diff --git a/src/parser/types.ts b/src/parser/types.ts
index e6a3727e92577..bae03d391ed54 100644
--- a/src/parser/types.ts
+++ b/src/parser/types.ts
@@ -226,6 +226,7 @@ namespace ts {
         ArrayType,
         TupleType,
         OptionalType,
+        RestType,
         UnionType,
         IntersectionType,
         ConditionalType,
@@ -1107,6 +1108,11 @@ namespace ts {
         type: TypeNode;
     }
 
+    export interface RestTypeNode extends TypeNode {
+        kind: SyntaxKind.RestType;
+        type: TypeNode;
+    }
+
     export type UnionOrIntersectionTypeNode = UnionTypeNode | IntersectionTypeNode;
 
     export interface UnionTypeNode extends TypeNode {
@@ -3854,6 +3860,7 @@ namespace ts {
 
     export interface TupleType extends GenericType {
         minLength: number;
+        hasRestElement: boolean;
         associatedNames?: __String[];
     }
 

From 4f99bc19c82fc44eb9241c554ab172cccb885473 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Sat, 16 Jun 2018 07:47:30 -0700
Subject: [PATCH 20/37] Merge branch 'master' into restTuples

# Conflicts:
#	tests/baselines/reference/APISample_Watch.errors.txt
#	tests/baselines/reference/APISample_WatchWithDefaults.errors.txt
#	tests/baselines/reference/APISample_WatchWithOwnWatchHost.errors.txt
#	tests/baselines/reference/APISample_compile.errors.txt
#	tests/baselines/reference/APISample_jsdoc.errors.txt
#	tests/baselines/reference/APISample_linter.errors.txt
#	tests/baselines/reference/APISample_parseConfig.errors.txt
#	tests/baselines/reference/APISample_transform.errors.txt
#	tests/baselines/reference/APISample_watcher.errors.txt
#	tests/baselines/reference/api/tsserverlibrary.d.ts
#	tests/baselines/reference/api/typescript.d.ts
---
 .gitignore                                    |     1 +
 Jakefile.js                                   |  1499 +-
 lib/.gitattributes                            |     2 +-
 lib/cancellationToken.js                      |     1 +
 lib/pt-br/diagnosticMessages.generated.json   |    24 +-
 lib/tsc.js                                    | 40568 +++-------
 lib/tsserver.js                               |   610 +-
 lib/tsserverlibrary.d.ts                      |  8978 ++-
 lib/tsserverlibrary.js                        |     8 +-
 lib/typescript.d.ts                           |   332 +-
 lib/typescript.js                             |     8 +-
 lib/typescriptServices.d.ts                   |   329 +-
 lib/typescriptServices.js                     |     8 +-
 lib/typingsInstaller.js                       | 61269 +++++++++++++++-
 lib/watchGuard.js                             |    16 +
 package.json                                  |     3 +-
 scripts/buildProtocol.ts                      |     6 +-
 scripts/processDiagnosticMessages.ts          |     4 +-
 scripts/produceLKG.ts                         |   100 +
 scripts/tsconfig.json                         |    20 +
 src/compiler/binder.ts                        |    21 +-
 src/compiler/checker.ts                       |   330 +-
 src/{parser => compiler}/commandLineParser.ts |     2 -
 src/{core => compiler}/core.ts                |    31 +-
 .../diagnosticMessages.json                   |     2 +-
 src/compiler/factory.ts                       |    29 +-
 .../moduleNameResolver.ts                     |     0
 src/compiler/moduleSpecifiers.ts              |    60 +-
 src/{parser => compiler}/parser.ts            |    14 +
 src/{core => compiler}/performance.ts         |     0
 src/compiler/program.ts                       |   153 +-
 src/compiler/resolutionCache.ts               |    25 +-
 src/{parser => compiler}/scanner.ts           |     0
 src/compiler/sourcemap.ts                     |   130 +-
 .../sourcemapDecoder.ts}                      |   152 +-
 src/{parser => compiler}/sys.ts               |     0
 src/compiler/transformers/declarations.ts     |     2 +-
 src/compiler/transformers/ts.ts               |     2 +-
 src/compiler/tsbuild.ts                       |    58 +-
 src/compiler/tsconfig.json                    |    20 +-
 src/compiler/tsconfig.release.json            |     8 +
 src/{parser => compiler}/types.ts             |    29 +-
 src/{parser => compiler}/utilities.ts         |    87 +-
 src/core/tsconfig.json                        |    11 -
 src/harness/fourslash.ts                      |    13 +-
 src/harness/harness.ts                        |    22 +-
 src/harness/sourceMapRecorder.ts              |   211 +-
 src/harness/tsconfig.json                     |     2 -
 src/harness/vfs.ts                            |   282 +-
 src/jsTyping/shared.ts                        |     1 +
 src/jsTyping/tsconfig.json                    |     3 +-
 src/jsTyping/types.ts                         |     1 +
 .../diagnosticMessages.generated.json.lcl     |    93 +
 .../diagnosticMessages.generated.json.lcl     |    93 +
 .../diagnosticMessages.generated.json.lcl     |   225 +
 .../diagnosticMessages.generated.json.lcl     |    93 +
 .../diagnosticMessages.generated.json.lcl     |    93 +
 .../diagnosticMessages.generated.json.lcl     |    93 +
 .../diagnosticMessages.generated.json.lcl     |   225 +
 .../diagnosticMessages.generated.json.lcl     |    93 +
 .../diagnosticMessages.generated.json.lcl     |    93 +
 .../diagnosticMessages.generated.json.lcl     |    93 +
 .../diagnosticMessages.generated.json.lcl     |    93 +
 .../diagnosticMessages.generated.json.lcl     |   231 +
 .../diagnosticMessages.generated.json.lcl     |    93 +
 src/parser/tsconfig.json                      |    19 -
 src/server/protocol.ts                        |    23 +
 src/server/session.ts                         |    40 +-
 src/server/tsconfig.json                      |     2 -
 .../codefixes/fixInvalidImportSyntax.ts       |    60 +-
 src/services/codefixes/importFixes.ts         |    12 +-
 src/services/getEditsForFileRename.ts         |    27 +-
 src/services/refactors/moveToNewFile.ts       |     2 +-
 src/services/services.ts                      |    29 -
 src/services/tsconfig.json                    |     5 +-
 src/services/utilities.ts                     |    11 +
 src/testRunner/compilerRunner.ts              |     4 +-
 src/testRunner/tsconfig.json                  |     2 -
 src/testRunner/unittests/publicApi.ts         |     1 +
 src/testRunner/unittests/tsbuild.ts           |    94 +-
 src/testRunner/unittests/tscWatchMode.ts      |    39 +
 .../unittests/tsserverProjectSystem.ts        |    76 +-
 src/testRunner/unittests/versionCache.ts      |     2 +-
 src/tsc/tsc.ts                                |     9 +-
 src/tsc/tsconfig.json                         |     2 -
 src/tsc/tsconfig.release.json                 |    18 +
 src/tsconfig-base.json                        |     2 +
 src/tsconfig.json                             |     1 -
 src/tsserver/tsconfig.json                    |     2 -
 src/tsserverLibrary/empty.ts                  |     1 -
 src/tsserverLibrary/tsconfig.json             |    19 -
 src/typescriptServices/empty.ts               |     1 -
 src/typescriptServices/tsconfig.json          |    20 -
 src/typingsInstaller/tsconfig.json            |     3 +-
 src/typingsInstallerCore/tsconfig.json        |     3 +-
 .../reference/APISample_Watch.errors.txt      |   208 -
 tests/baselines/reference/APISample_Watch.js  |    11 +-
 .../APISample_WatchWithDefaults.errors.txt    |   181 -
 .../reference/APISample_WatchWithDefaults.js  |     7 +
 ...APISample_WatchWithOwnWatchHost.errors.txt |   188 -
 .../APISample_WatchWithOwnWatchHost.js        |     9 +-
 .../reference/APISample_compile.errors.txt    |   171 -
 .../baselines/reference/APISample_compile.js  |    11 +-
 .../reference/APISample_jsdoc.errors.txt      |   246 -
 tests/baselines/reference/APISample_jsdoc.js  |     7 +
 .../reference/APISample_linter.errors.txt     |   196 -
 tests/baselines/reference/APISample_linter.js |    13 +-
 .../APISample_parseConfig.errors.txt          |   168 -
 .../reference/APISample_parseConfig.js        |    13 +-
 .../reference/APISample_transform.errors.txt  |   148 -
 .../reference/APISample_transform.js          |    13 +-
 .../reference/APISample_watcher.errors.txt    |   242 -
 .../baselines/reference/APISample_watcher.js  |    11 +-
 .../reference/api/tsserverlibrary.d.ts        |  1025 +-
 tests/baselines/reference/api/typescript.d.ts |  7017 +-
 .../chainedPrototypeAssignment.types          |     4 +-
 .../reference/checkJsdocTypeTag4.errors.txt   |    21 +
 .../reference/checkJsdocTypeTag4.symbols      |    20 +
 .../reference/checkJsdocTypeTag4.types        |    20 +
 .../reference/commonSourceDirectory.js        |     2 +-
 .../reference/commonSourceDirectory.js.map    |     2 +-
 .../commonSourceDirectory.sourcemap.txt       |     8 +-
 .../reference/commonSourceDirectory_dts.js    |     2 +-
 .../commonSourceDirectory_dts.js.map          |     2 +-
 .../commonSourceDirectory_dts.sourcemap.txt   |     8 +-
 .../conflictingCommonJSES2015Exports.symbols  |    18 +
 .../conflictingCommonJSES2015Exports.types    |    27 +
 ...opPrettyErrorRelatedInformation.errors.txt |    24 +
 ...uleInteropPrettyErrorRelatedInformation.js |    25 +
 ...teropPrettyErrorRelatedInformation.symbols |    23 +
 ...InteropPrettyErrorRelatedInformation.types |    25 +
 .../reference/exportNestedNamespaces.symbols  |     2 +-
 .../reference/exportNestedNamespaces.types    |    18 +-
 .../jsContainerMergeJsContainer.types         |     8 +-
 .../jsContainerMergeTsDeclaration3.types      |     2 +-
 .../jsObjectsMarkedAsOpenEnded.types          |     2 +-
 ...docParameterParsingInfiniteLoop.errors.txt |     5 +-
 .../moduleExportNestedNamespaces.types        |     8 +-
 .../reference/nestedPrototypeAssignment.types |    12 +-
 .../reference/noDuplicateJsdoc1.errors.txt    |     9 +
 .../reference/noDuplicateJsdoc1.symbols       |     5 +
 .../reference/noDuplicateJsdoc1.types         |     9 +
 .../reference/outfile-concat-fileListing.txt  |    43 -
 tests/baselines/reference/outfile-concat.js   |    91 +-
 .../baselines/reference/outfile-concat.js.map |     1 -
 .../symbolLinkDeclarationEmitModuleNames.js   |   116 +
 ...mbolLinkDeclarationEmitModuleNames.symbols |    59 +
 ...symbolLinkDeclarationEmitModuleNames.types |    63 +
 ...olLinkDeclarationEmitModuleNamesRootDir.js |    87 +
 ...kDeclarationEmitModuleNamesRootDir.symbols |    55 +
 ...inkDeclarationEmitModuleNamesRootDir.types |    58 +
 tests/baselines/reference/third-output.js     |    26 -
 tests/baselines/reference/third-output.js.map |     2 +-
 tests/baselines/reference/thisTag1.symbols    |    32 +
 tests/baselines/reference/thisTag1.types      |    37 +
 .../tsconfig.json                             |     4 +-
 .../tsconfig.json                             |     4 +-
 .../tsconfig.json                             |     4 +-
 .../tsconfig.json                             |     4 +-
 .../tsconfig.json                             |     4 +-
 .../tsconfig.json                             |     4 +-
 .../tsconfig.json                             |     4 +-
 .../tsconfig.json                             |     4 +-
 .../tsconfig.json                             |     4 +-
 .../typeFromPropertyAssignment10.types        |    80 +-
 .../typeFromPropertyAssignment11.types        |    12 +-
 .../typeFromPropertyAssignment13.types        |    26 +-
 .../typeFromPropertyAssignment14.types        |    30 +-
 .../typeFromPropertyAssignment15.types        |     8 +-
 .../typeFromPropertyAssignment16.types        |    30 +-
 .../typeFromPropertyAssignment18.symbols      |    16 +
 .../typeFromPropertyAssignment18.types        |    50 +-
 .../typeFromPropertyAssignment24.types        |    10 +-
 .../typeFromPropertyAssignment25.types        |    14 +-
 .../typeFromPropertyAssignment26.errors.txt   |    24 +
 .../typeFromPropertyAssignment26.symbols      |    43 +
 .../typeFromPropertyAssignment26.types        |    55 +
 .../typeFromPropertyAssignment4.types         |    10 +-
 .../typeFromPropertyAssignment7.types         |     8 +-
 .../typeFromPropertyAssignment8.types         |    72 +-
 .../typeFromPropertyAssignment9.symbols       |     2 +-
 .../typeFromPropertyAssignment9.types         |    90 +-
 ...typeFromPropertyAssignmentOutOfOrder.types |    22 +-
 ...typeFromPropertyAssignmentWithExport.types |     8 +-
 .../reference/typedefCrossModule3.types       |    10 +-
 .../typedefMultipleTypeParameters.errors.txt  |    10 +-
 .../typedefMultipleTypeParameters.symbols     |     5 +-
 .../typedefMultipleTypeParameters.types       |     1 -
 ...sedLocalsStartingWithUnderscore.errors.txt |    13 +-
 .../unusedLocalsStartingWithUnderscore.js     |    26 +-
 ...unusedLocalsStartingWithUnderscore.symbols |    21 +-
 .../unusedLocalsStartingWithUnderscore.types  |    11 +-
 .../user/TypeScript-Node-Starter.log          |     2 +
 tests/baselines/reference/user/acorn.log      |     6 +-
 .../reference/user/adonis-framework.log       |     3 +-
 tests/baselines/reference/user/antd.log       |     9 -
 tests/baselines/reference/user/async.log      |     4 +-
 tests/baselines/reference/user/bcryptjs.log   |     6 +-
 .../user/chrome-devtools-frontend.log         |  3408 +-
 tests/baselines/reference/user/lodash.log     |    22 +-
 tests/baselines/reference/user/npm.log        |     5 +
 tests/baselines/reference/user/puppeteer.log  |     1 +
 tests/baselines/reference/user/uglify-js.log  |    11 +-
 tests/baselines/reference/user/util.log       |    48 -
 tests/cases/compiler/APISample_Watch.ts       |    10 +-
 .../compiler/APISample_WatchWithDefaults.ts   |    10 +-
 .../APISample_WatchWithOwnWatchHost.ts        |    46 +-
 tests/cases/compiler/APISample_compile.ts     |    10 +-
 tests/cases/compiler/APISample_jsdoc.ts       |    11 +-
 tests/cases/compiler/APISample_linter.ts      |    12 +-
 tests/cases/compiler/APISample_parseConfig.ts |    12 +-
 tests/cases/compiler/APISample_transform.ts   |    12 +-
 tests/cases/compiler/APISample_watcher.ts     |    10 +-
 ...uleInteropPrettyErrorRelatedInformation.ts |    10 +
 .../symbolLinkDeclarationEmitModuleNames.ts   |    25 +
 ...olLinkDeclarationEmitModuleNamesRootDir.ts |    33 +
 .../unusedLocalsStartingWithUnderscore.ts     |     8 +-
 .../conformance/jsdoc/checkJsdocTypeTag4.ts   |    16 +
 .../conformance/jsdoc/noDuplicateJsdoc1.ts    |     6 +
 tests/cases/conformance/jsdoc/thisTag1.ts     |    19 +
 .../jsdoc/typedefMultipleTypeParameters.ts    |     1 -
 .../salsa/conflictingCommonJSES2015Exports.ts |     9 +
 .../salsa/typeFromPropertyAssignment18.ts     |     2 +
 .../salsa/typeFromPropertyAssignment26.ts     |    19 +
 .../fourslash/codeFixCalledES2015Import1.ts   |     8 +-
 .../fourslash/codeFixCalledES2015Import12.ts  |     2 +-
 .../fourslash/codeFixCalledES2015Import2.ts   |     8 +-
 .../fourslash/codeFixCalledES2015Import3.ts   |     8 +-
 .../fourslash/codeFixCalledES2015Import4.ts   |     7 +-
 .../cases/fourslash/getEditsForFileRename.ts  |     4 +
 .../getEditsForFileRename_tsconfig.ts         |     2 -
 tests/cases/fourslash/moveToNewFile.ts        |     5 +-
 .../moveToNewFile_inferQuoteStyle.ts          |     5 +-
 .../outfile-concat/first/first_PART1.ts       |    11 +
 234 files changed, 89027 insertions(+), 44075 deletions(-)
 create mode 100644 scripts/produceLKG.ts
 create mode 100644 scripts/tsconfig.json
 rename src/{parser => compiler}/commandLineParser.ts (97%)
 rename src/{core => compiler}/core.ts (97%)
 rename src/{parser => compiler}/diagnosticMessages.json (96%)
 rename src/{parser => compiler}/moduleNameResolver.ts (100%)
 rename src/{parser => compiler}/parser.ts (97%)
 rename src/{core => compiler}/performance.ts (100%)
 rename src/{parser => compiler}/scanner.ts (100%)
 rename src/{services/sourcemaps.ts => compiler/sourcemapDecoder.ts} (77%)
 rename src/{parser => compiler}/sys.ts (100%)
 create mode 100644 src/compiler/tsconfig.release.json
 rename src/{parser => compiler}/types.ts (97%)
 rename src/{parser => compiler}/utilities.ts (97%)
 delete mode 100644 src/core/tsconfig.json
 delete mode 100644 src/parser/tsconfig.json
 create mode 100644 src/tsc/tsconfig.release.json
 delete mode 100644 src/tsserverLibrary/empty.ts
 delete mode 100644 src/tsserverLibrary/tsconfig.json
 delete mode 100644 src/typescriptServices/empty.ts
 delete mode 100644 src/typescriptServices/tsconfig.json
 delete mode 100644 tests/baselines/reference/APISample_Watch.errors.txt
 delete mode 100644 tests/baselines/reference/APISample_WatchWithDefaults.errors.txt
 delete mode 100644 tests/baselines/reference/APISample_WatchWithOwnWatchHost.errors.txt
 delete mode 100644 tests/baselines/reference/APISample_compile.errors.txt
 delete mode 100644 tests/baselines/reference/APISample_jsdoc.errors.txt
 delete mode 100644 tests/baselines/reference/APISample_linter.errors.txt
 delete mode 100644 tests/baselines/reference/APISample_parseConfig.errors.txt
 delete mode 100644 tests/baselines/reference/APISample_transform.errors.txt
 delete mode 100644 tests/baselines/reference/APISample_watcher.errors.txt
 create mode 100644 tests/baselines/reference/checkJsdocTypeTag4.errors.txt
 create mode 100644 tests/baselines/reference/checkJsdocTypeTag4.symbols
 create mode 100644 tests/baselines/reference/checkJsdocTypeTag4.types
 create mode 100644 tests/baselines/reference/conflictingCommonJSES2015Exports.symbols
 create mode 100644 tests/baselines/reference/conflictingCommonJSES2015Exports.types
 create mode 100644 tests/baselines/reference/esModuleInteropPrettyErrorRelatedInformation.errors.txt
 create mode 100644 tests/baselines/reference/esModuleInteropPrettyErrorRelatedInformation.js
 create mode 100644 tests/baselines/reference/esModuleInteropPrettyErrorRelatedInformation.symbols
 create mode 100644 tests/baselines/reference/esModuleInteropPrettyErrorRelatedInformation.types
 create mode 100644 tests/baselines/reference/noDuplicateJsdoc1.errors.txt
 create mode 100644 tests/baselines/reference/noDuplicateJsdoc1.symbols
 create mode 100644 tests/baselines/reference/noDuplicateJsdoc1.types
 delete mode 100644 tests/baselines/reference/outfile-concat-fileListing.txt
 delete mode 100644 tests/baselines/reference/outfile-concat.js.map
 create mode 100644 tests/baselines/reference/symbolLinkDeclarationEmitModuleNames.js
 create mode 100644 tests/baselines/reference/symbolLinkDeclarationEmitModuleNames.symbols
 create mode 100644 tests/baselines/reference/symbolLinkDeclarationEmitModuleNames.types
 create mode 100644 tests/baselines/reference/symbolLinkDeclarationEmitModuleNamesRootDir.js
 create mode 100644 tests/baselines/reference/symbolLinkDeclarationEmitModuleNamesRootDir.symbols
 create mode 100644 tests/baselines/reference/symbolLinkDeclarationEmitModuleNamesRootDir.types
 delete mode 100644 tests/baselines/reference/third-output.js
 create mode 100644 tests/baselines/reference/thisTag1.symbols
 create mode 100644 tests/baselines/reference/thisTag1.types
 create mode 100644 tests/baselines/reference/typeFromPropertyAssignment26.errors.txt
 create mode 100644 tests/baselines/reference/typeFromPropertyAssignment26.symbols
 create mode 100644 tests/baselines/reference/typeFromPropertyAssignment26.types
 delete mode 100644 tests/baselines/reference/user/antd.log
 create mode 100644 tests/cases/compiler/esModuleInteropPrettyErrorRelatedInformation.ts
 create mode 100644 tests/cases/compiler/symbolLinkDeclarationEmitModuleNames.ts
 create mode 100644 tests/cases/compiler/symbolLinkDeclarationEmitModuleNamesRootDir.ts
 create mode 100644 tests/cases/conformance/jsdoc/checkJsdocTypeTag4.ts
 create mode 100644 tests/cases/conformance/jsdoc/noDuplicateJsdoc1.ts
 create mode 100644 tests/cases/conformance/jsdoc/thisTag1.ts
 create mode 100644 tests/cases/conformance/salsa/conflictingCommonJSES2015Exports.ts
 create mode 100644 tests/cases/conformance/salsa/typeFromPropertyAssignment26.ts
 create mode 100644 tests/projects/outfile-concat/first/first_PART1.ts

diff --git a/.gitignore b/.gitignore
index 72022f3dda134..b5aecdbe35d47 100644
--- a/.gitignore
+++ b/.gitignore
@@ -46,6 +46,7 @@ scripts/configurePrerelease.js
 scripts/open-user-pr.js
 scripts/processDiagnosticMessages.d.ts
 scripts/processDiagnosticMessages.js
+scripts/produceLKG.js
 scripts/importDefinitelyTypedTests/importDefinitelyTypedTests.js
 scripts/generateLocalizedDiagnosticMessages.js
 scripts/*.js.map
diff --git a/Jakefile.js b/Jakefile.js
index 4b60dabca3448..9b3876ea13fb6 100644
--- a/Jakefile.js
+++ b/Jakefile.js
@@ -2,798 +2,378 @@
 // @ts-check
 /// <reference types="jake" />
 
-var fs = require("fs");
-var os = require("os");
-var path = require("path");
-var child_process = require("child_process");
-var fold = require("travis-fold");
-var ts = require("./lib/typescript");
+const fs = require("fs");
+const os = require("os");
+const path = require("path");
+const fold = require("travis-fold");
+const ts = require("./lib/typescript");
+const del = require("del");
 const getDirSize = require("./scripts/build/getDirSize");
 
-// Variables
-var parserDirectory = "src/parser/";
-var compilerDirectory = "src/compiler/";
-var serverDirectory = "src/server/";
-var harnessDirectory = "src/harness/";
-var libraryDirectory = "src/lib/";
-var scriptsDirectory = "scripts/";
-var unittestsDirectory = "src/harness/unittests/";
-var docDirectory = "doc/";
-var lclDirectory = "src/loc/lcl";
-
-var builtDirectory = "built/";
-var builtLocalDirectory = "built/local/";
-var LKGDirectory = "lib/";
-
-var copyright = "CopyrightNotice.txt";
-var thirdParty = "ThirdPartyNoticeText.txt";
-
-var defaultTestTimeout = 40000;
-
-// Task to build the tests infrastructure using the built compiler
-var run = path.join(builtLocalDirectory, "run.js");
-
-// add node_modules to path so we don't need global modules, prefer the modules by adding them first
-var nodeModulesPathPrefix = path.resolve("./node_modules/.bin/") + path.delimiter;
-if (process.env.path !== undefined) {
-    process.env.path = nodeModulesPathPrefix + process.env.path;
-}
-else if (process.env.PATH !== undefined) {
-    process.env.PATH = nodeModulesPathPrefix + process.env.PATH;
-}
-
-/**
- * @param diagnostics {ts.Diagnostic[]}
- * @param [pretty] {boolean}
- */
-function diagnosticsToString(diagnostics, pretty) {
-    const host = {
-        getCurrentDirectory() { return process.cwd(); },
-        getCanonicalFileName(fileName) { return fileName; },
-        getNewLine() { return os.EOL; }
-    };
-    return pretty ? ts.formatDiagnosticsWithColorAndContext(diagnostics, host) :
-        ts.formatDiagnostics(diagnostics, host);
-}
-
-/** @param diagnostics {ts.Diagnostic[]} */
-function reportDiagnostics(diagnostics) {
-    console.log(diagnosticsToString(diagnostics, process.stdout.isTTY));
-}
-
-/** @param jsonPath {string} */
-function readJson(jsonPath) {
-    const jsonText = fs.readFileSync(jsonPath, "utf8");
-    const result = ts.parseConfigFileTextToJson(jsonPath, jsonText);
-    if (result.error) {
-        reportDiagnostics([result.error]);
-        throw new Error("An error occurred during parse.");
-    }
-    return result.config;
-}
-
-/** @param configPath {string} */
-function filesFromConfig(configPath) {
-    const config = readJson(configPath);
-    const configFileContent = ts.parseJsonConfigFileContent(config, ts.sys, path.dirname(configPath));
-    if (configFileContent.errors && configFileContent.errors.length) {
-        reportDiagnostics(configFileContent.errors);
-        throw new Error("An error occurred during parse.");
-    }
-    return configFileContent.fileNames;
-}
-
-/** @param configPath {string} */
-function filesAndOutputFromConfig(configPath) {
-    const config = readJson(configPath);
-    const configFileContent = ts.parseJsonConfigFileContent(config, ts.sys, path.dirname(configPath));
-    if (configFileContent.errors && configFileContent.errors.length) {
-        reportDiagnostics(configFileContent.errors);
-        throw new Error("An error occurred during parse.");
-    }
-    return { files: configFileContent.fileNames, output: configFileContent.options.outFile };
-}
-
-function toNs(diff) {
-    return diff[0] * 1e9 + diff[1];
-}
-
-function mark() {
-    if (!fold.isTravis()) return;
-    var stamp = process.hrtime();
-    var id = Math.floor(Math.random() * 0xFFFFFFFF).toString(16);
-    console.log("travis_time:start:" + id + "\r");
-    return {
-        stamp: stamp,
-        id: id
-    };
-}
-
-function measure(marker) {
-    if (!fold.isTravis()) return;
-    var diff = process.hrtime(marker.stamp);
-    var total = [marker.stamp[0] + diff[0], marker.stamp[1] + diff[1]];
-    console.log("travis_time:end:" + marker.id + ":start=" + toNs(marker.stamp) + ",finish=" + toNs(total) + ",duration=" + toNs(diff) + "\r");
-}
-
-function removeConstModifierFromEnumDeclarations(text) {
-    return text.replace(/^(\s*)(export )?const enum (\S+) {(\s*)$/gm, '$1$2enum $3 {$4');
-}
-
-compileOutputConfigFile('src/parser/tsconfig.json');
-compileOutputConfigFile('src/compiler/tsconfig.json');
-compileOutputConfigFile('src/services/tsconfig.json');
-compileOutputConfigFile('src/typescriptServices/tsconfig.json', [], [copyright], function () {
-    jake.cpR(servicesFile, nodePackageFile, { silent: true });
-
-    prependFile(copyright, standaloneDefinitionsFile);
-
-    // Stanalone/web definition file using global 'ts' namespace
-    jake.cpR(standaloneDefinitionsFile, nodeDefinitionsFile, { silent: true });
-    var definitionFileContents = fs.readFileSync(nodeDefinitionsFile).toString();
-    definitionFileContents = removeConstModifierFromEnumDeclarations(definitionFileContents);
-    fs.writeFileSync(standaloneDefinitionsFile, definitionFileContents);
-
-    // Official node package definition file, pointed to by 'typings' in package.json
-    // Created by appending 'export = ts;' at the end of the standalone file to turn it into an external module
-    var nodeDefinitionsFileContents = definitionFileContents + "\nexport = ts;";
-    fs.writeFileSync(nodeDefinitionsFile, nodeDefinitionsFileContents);
-
-    // Node package definition file to be distributed without the package. Created by replacing
-    // 'ts' namespace with '"typescript"' as a module.
-    var nodeStandaloneDefinitionsFileContents = definitionFileContents.replace(/declare (namespace|module) ts/g, 'declare module "typescript"');
-    fs.writeFileSync(nodeStandaloneDefinitionsFile, nodeStandaloneDefinitionsFileContents);
-});
-compileOutputConfigFile('src/core/tsconfig.json');
-compileOutputConfigFile('src/harness/tsconfig.json');
-compileOutputConfigFile('src/testRunner/tsconfig.json');
-compileOutputConfigFile('src/tsc/tsconfig.json', [], [copyright]);
-compileOutputConfigFile('src/server/tsconfig.json', [], [copyright]);
-compileOutputConfigFile('src/tsserver/tsconfig.json', [], [copyright]);
-compileOutputConfigFile('src/tsserverLibrary/tsconfig.json', [], [], function () {
-    prependFile(copyright, tsserverLibraryDefinitionFile);
-
-    // Appending exports at the end of the server library
-    var tsserverLibraryDefinitionFileContents =
-        fs.readFileSync(tsserverLibraryDefinitionFile).toString() +
-        "\nexport = ts;" +
-        "\nexport as namespace ts;";
-    tsserverLibraryDefinitionFileContents = removeConstModifierFromEnumDeclarations(tsserverLibraryDefinitionFileContents);
-    // Normalize line endings
-    tsserverLibraryDefinitionFileContents = tsserverLibraryDefinitionFileContents.replace(/\r\n/g, "\n");
-
-    fs.writeFileSync(tsserverLibraryDefinitionFile, tsserverLibraryDefinitionFileContents);
-});
-compileOutputConfigFile('src/typingsInstaller/tsconfig.json');
-compileOutputConfigFile('src/typingsInstallerCore/tsconfig.json');
-compileOutputConfigFile('src/watchGuard/tsconfig.json');
-compileConfigFile('built/local/cancellationToken.js', [], 'src/cancellationToken/tsconfig.json', [copyright]);
-
-var typesMapOutputPath = path.join(builtLocalDirectory, 'typesMap.json');
-
-/** @type {{ libs: string[], paths?: Record<string, string>, sources?: Record<string, string[]> }} */
-var libraries = readJson("./src/lib/libs.json");
-
-/**
- * .lcg file is what localization team uses to know what messages to localize.
- * The file is always generated in 'enu\diagnosticMessages.generated.json.lcg'
- */
-var generatedLCGFile = path.join(builtLocalDirectory, "enu", "diagnosticMessages.generated.json.lcg");
-
-/**
- * The localization target produces the two following transformations:
- *    1. 'src\loc\lcl\<locale>\diagnosticMessages.generated.json.lcl' => 'built\local\<locale>\diagnosticMessages.generated.json'
- *       convert localized resources into a .json file the compiler can understand
- *    2. 'src\compiler\diagnosticMessages.generated.json' => 'built\local\ENU\diagnosticMessages.generated.json.lcg'
- *       generate the lcg file (source of messages to localize) from the diagnosticMessages.generated.json
- */
-var localizationTargets = ["cs", "de", "es", "fr", "it", "ja", "ko", "pl", "pt-br", "ru", "tr", "zh-cn", "zh-tw"].map(function (f) {
-    return path.join(builtLocalDirectory, f);
-}).concat(path.dirname(generatedLCGFile));
-
-// Prepends the contents of prefixFile to destinationFile
-function prependFile(prefixFile, destinationFile) {
-    if (!fs.existsSync(prefixFile)) {
-        fail(prefixFile + " does not exist!");
-    }
-    if (!fs.existsSync(destinationFile)) {
-        fail(destinationFile + " failed to be created!");
-    }
-    var temp = "temptemp";
-    jake.cpR(prefixFile, temp, { silent: true });
-    fs.appendFileSync(temp, fs.readFileSync(destinationFile));
-    fs.renameSync(temp, destinationFile);
-}
-
-// concatenate a list of sourceFiles to a destinationFile
-function concatenateFiles(destinationFile, sourceFiles) {
-    var temp = "temptemp";
-    // append all files in sequence
-    var text = "";
-    for (var i = 0; i < sourceFiles.length; i++) {
-        if (!fs.existsSync(sourceFiles[i])) {
-            fail(sourceFiles[i] + " does not exist!");
-        }
-        if (i > 0) { text += "\n\n"; }
-        text += fs.readFileSync(sourceFiles[i]).toString().replace(/\r?\n/g, "\n");
-    }
-    fs.writeFileSync(temp, text);
-    // Move the file to the final destination
-    fs.renameSync(temp, destinationFile);
-}
-
-var useDebugMode = true;
-var host = process.env.TYPESCRIPT_HOST || process.env.host || "node";
-var compilerFilename = "tsc.js";
-var LKGCompiler = path.join(LKGDirectory, compilerFilename);
-var builtLocalCompiler = path.join(builtLocalDirectory, compilerFilename);
-
-function compileOutputConfigFile(configFile, prereqs, prefixes, callback) {
-    const info = filesAndOutputFromConfig(configFile);
-    compileConfigFile(info.output, prereqs, configFile, prefixes, false, callback);
-}
-
-function compileConfigFile(outFile, prereqs, configFile, prefixes, useBuiltCompiler = false, callback) {
-    const allPrereqs = filesFromConfig(configFile).concat(prereqs || []).concat(configFile);
-    outFile = outFile.replace(/\//g, path.sep);
-    file(outFile, allPrereqs, function () {
-        const startCompileTime = mark();
-        const compilerPath = useBuiltCompiler ? builtLocalCompiler : LKGCompiler;
-        const cmd = `${host} ${compilerPath} -b ${configFile}`;
-        console.log(cmd + "\n");
-
-        var ex = jake.createExec([cmd]);
-        // Add listeners for output and error
-        ex.addListener("stdout", function (output) {
-            process.stdout.write(output);
-        });
-        ex.addListener("stderr", function (error) {
-            process.stderr.write(error);
-        });
-        ex.addListener("cmdEnd", function () {
-            if (!useDebugMode && prefixes && fs.existsSync(outFile)) {
-                for (var i in prefixes) {
-                    prependFile(prefixes[i], outFile);
-                }
-            }
-
-            if (callback) {
-                callback();
-            }
-
-            measure(startCompileTime);
-            complete();
-        });
-        ex.addListener("error", function () {
-            fs.unlinkSync(outFile);
-            fail("Compilation of " + outFile + " unsuccessful");
-            measure(startCompileTime);
-        });
-        ex.run();
-    }, { async: true });
-}
-
-/**
- * Compiles a file from a list of sources
- * @param {string} outFile the target file name
- * @param {string[]} sources an array of the names of the source files
- * @param {string[]} prereqs prerequisite tasks to compiling the file
- * @param {string[]} prefixes a list of files to prepend to the target file
- * @param {boolean} useBuiltCompiler true to use the built compiler, false to use the LKG
- * @param {object} [opts] property bag containing auxiliary options
- * @param {boolean} [opts.noOutFile] true to compile without using --out
- * @param {boolean} [opts.generateDeclarations] true to compile using --declaration
- * @param {string} [opts.outDir] value for '--outDir' command line option
- * @param {boolean} [opts.keepComments] false to compile using --removeComments
- * @param {boolean} [opts.preserveConstEnums] true if compiler should keep const enums in code
- * @param {boolean} [opts.noResolve] true if compiler should not include non-rooted files in compilation
- * @param {boolean} [opts.stripInternal] true if compiler should remove declarations marked as internal
- * @param {boolean} [opts.inlineSourceMap] true if compiler should inline sourceMap
- * @param {string[]} [opts.types] array of types to include in compilation
- * @param {string} [opts.lib] explicit libs to include.
- * @param {function(): void} [callback] a function to execute after the compilation process ends
- */
-function compileFile(outFile, sources, prereqs, prefixes, useBuiltCompiler, opts, callback) {
-    file(outFile, prereqs, function () {
-        var startCompileTime = mark();
-        opts = opts || {};
-        var compilerPath = useBuiltCompiler ? builtLocalCompiler : LKGCompiler;
-        var options = "--noImplicitAny --noImplicitThis --alwaysStrict --noEmitOnError";
-        if (opts.types) {
-            options += " --types " + opts.types.join(",");
-        }
-        options += " --pretty";
-        // Keep comments when specifically requested
-        // or when in debug mode.
-        if (!(opts.keepComments || useDebugMode)) {
-            options += " --removeComments";
-        }
-
-        if (opts.generateDeclarations) {
-            options += " --declaration";
-        }
-
-        if (opts.preserveConstEnums || useDebugMode) {
-            options += " --preserveConstEnums";
-        }
-
-        if (opts.outDir) {
-            options += " --outDir " + opts.outDir;
-        }
-
-        if (!opts.noOutFile) {
-            options += " --out " + outFile;
-        }
-        else {
-            options += " --module commonjs";
-        }
-
-        if (opts.noResolve) {
-            options += " --noResolve";
-        }
-
-        if (useDebugMode) {
-            if (opts.inlineSourceMap) {
-                options += " --inlineSourceMap --inlineSources";
-            }
-            else {
-                options += " --sourcemap";
-            }
-        }
-        options += " --newLine LF";
-
-        if (opts.stripInternal) {
-            options += " --stripInternal";
-        }
-        options += " --target es5";
-        if (opts.lib) {
-            options += " --lib " + opts.lib;
-        }
-        else {
-            options += " --lib es5";
-        }
-        options += " --noUnusedLocals --noUnusedParameters --strictNullChecks";
-
-        var cmd = host + " " + compilerPath + " " + options + " ";
-        cmd = cmd + sources.join(" ");
-        console.log(cmd + "\n");
-
-        var ex = jake.createExec([cmd]);
-        // Add listeners for output and error
-        ex.addListener("stdout", function (output) {
-            process.stdout.write(output);
-        });
-        ex.addListener("stderr", function (error) {
-            process.stderr.write(error);
-        });
-        ex.addListener("cmdEnd", function () {
-            if (!useDebugMode && prefixes && fs.existsSync(outFile)) {
-                for (var i in prefixes) {
-                    prependFile(prefixes[i], outFile);
-                }
-            }
+const host = process.env.TYPESCRIPT_HOST || process.env.host || "node";
+
+const locales = ["cs", "de", "es", "fr", "it", "ja", "ko", "pl", "pt-br", "ru", "tr", "zh-cn", "zh-tw"];
+
+const defaultTestTimeout = 40000;
+
+let useDebugMode = true;
+
+const TaskNames = {
+    local: "local",
+    runtests: "runtests",
+    runtestsParallel: "runtests-parallel",
+    buildRules: "build-rules",
+    clean: "clean",
+    lib: "lib",
+    buildFoldStart: "build-fold-start",
+    buildFoldEnd: "build-fold-end",
+    generateDiagnostics: "generate-diagnostics",
+    coreBuild: "core-build",
+    lkg: "LKG",
+    release: "release",
+    lssl: "lssl",
+    lint: "lint",
+    scripts: "scripts",
+    localize: "localize",
+    configureInsiders: "configure-insiders",
+    publishInsiders: "publish-insiders",
+    configureNightly: "configure-nightly",
+    publishNightly: "publish-nightly"
+};
+
+const Paths = {};
+Paths.lkg = "lib";
+Paths.lkgCompiler = "lib/tsc.js";
+Paths.built = "built";
+Paths.builtLocal = "built/local";
+Paths.builtLocalCompiler = "built/local/tsc.js";
+Paths.builtLocalTSServer = "built/local/tsserver.js";
+Paths.builtLocalRun = "built/local/run.js";
+Paths.typesMapOutput = "built/local/typesMap.json";
+Paths.servicesFile = "built/local/typescriptServices.js";
+Paths.servicesDefinitionFile = "built/local/typescriptServices.d.ts";
+Paths.typescriptDefinitionFile = "built/local/typescript.d.ts";
+Paths.typescriptStandaloneDefinitionFile = "built/local/typescript_standalone.d.ts";
+Paths.tsserverLibraryDefinitionFile = "built/local/tsserverlibrary.d.ts";
+Paths.baselines = {};
+Paths.baselines.local = "tests/baselines/local";
+Paths.baselines.localTest262 = "tests/baselines/test262/local";
+Paths.baselines.localRwc = "tests/baselines/rwc/local";
+Paths.baselines.reference = "tests/baselines/reference";
+Paths.baselines.referenceTest262 = "tests/baselines/test262/reference";
+Paths.baselines.referenceRwc = "tests/baselines/rwc/reference";
+Paths.copyright = "CopyrightNotice.txt";
+Paths.thirdParty = "ThirdPartyNoticeText.txt";
+Paths.processDiagnosticMessagesJs = "scripts/processDiagnosticMessages.js";
+Paths.diagnosticInformationMap = "src/compiler/diagnosticInformationMap.generated.ts";
+Paths.diagnosticMessagesJson = "src/compiler/diagnosticMessages.json";
+Paths.diagnosticGeneratedJson = "src/compiler/diagnosticMessages.generated.json";
+Paths.builtDiagnosticGeneratedJson = "built/local/diagnosticMessages.generated.json";
+Paths.lcl = "src/loc/lcl"
+Paths.locLcg = "built/local/enu/diagnosticMessages.generated.json.lcg";
+Paths.generatedLCGFile = path.join(Paths.builtLocal, "enu", "diagnosticMessages.generated.json.lcg");
+Paths.library = "src/lib";
+Paths.srcServer = "src/server";
+Paths.scripts = {};
+Paths.scripts.generateLocalizedDiagnosticMessages = "scripts/generateLocalizedDiagnosticMessages.js";
+Paths.scripts.processDiagnosticMessages = "scripts/processDiagnosticMessages.js";
+Paths.scripts.produceLKG = "scripts/produceLKG.js";
+Paths.scripts.configurePrerelease = "scripts/configurePrerelease.js";
+Paths.packageJson = "package.json";
+Paths.versionFile = "src/compiler/core.ts";
+
+const ConfigFileFor = {
+    tsc: "src/tsc",
+    tsserver: "src/tsserver",
+    runjs: "src/testRunner",
+    lint: "scripts/tslint",
+    scripts: "scripts",
+    all: "src"
+};
+
+const ExpectedLKGFiles = [
+    "tsc.js",
+    "tsserver.js",
+    "typescriptServices.js",
+    "typescriptServices.d.ts",
+    "typescript.js",
+    "typescript.d.ts",
+    "cancellationToken.js",
+    "typingsInstaller.js",
+    "protocol.d.ts",
+    "watchGuard.js"
+];
 
-            if (callback) {
-                callback();
-            }
+directory(Paths.builtLocal);
 
-            measure(startCompileTime);
-            complete();
-        });
-        ex.addListener("error", function () {
-            fs.unlinkSync(outFile);
-            fail("Compilation of " + outFile + " unsuccessful");
-            measure(startCompileTime);
-        });
-        ex.run();
-    }, { async: true });
-}
+// Local target to build the compiler and services
+desc("Builds the full compiler and services");
+task(TaskNames.local, [
+    TaskNames.buildFoldStart,
+    TaskNames.coreBuild,
+    TaskNames.localize,
+    TaskNames.buildFoldEnd
+]);
 
-// Prerequisite task for built directory and library typings
-directory(builtLocalDirectory);
+task("default", [TaskNames.local]);
 
-var libraryTargets = libraries.libs.map(function (lib) {
-    var relativeSources = ["header.d.ts"].concat(libraries.sources && libraries.sources[lib] || [lib + ".d.ts"]);
-    var relativeTarget = libraries.paths && libraries.paths[lib] || ("lib." + lib + ".d.ts");
-    var sources = [copyright].concat(relativeSources.map(s => path.join(libraryDirectory, s)));
-    var target = path.join(builtLocalDirectory, relativeTarget);
-    file(target, [builtLocalDirectory].concat(sources), function () {
-        concatenateFiles(target, sources);
+const RunTestsPrereqs = [TaskNames.lib, Paths.servicesDefinitionFile, Paths.tsserverLibraryDefinitionFile];
+desc("Runs all the tests in parallel using the built run.js file. Optional arguments are: t[ests]=category1|category2|... d[ebug]=true.");
+task(TaskNames.runtestsParallel, RunTestsPrereqs, function () {
+    tsbuild([ConfigFileFor.runjs], true, () => {
+        runConsoleTests("min", /*parallel*/ true);
     });
-    return target;
-});
-
-// Lib target to build the library files
-desc("Builds the library targets");
-task("lib", libraryTargets);
-
-
-// Generate diagnostics
-var processDiagnosticMessagesJs = path.join(scriptsDirectory, "processDiagnosticMessages.js");
-var diagnosticMessagesJson = path.join(parserDirectory, "diagnosticMessages.json");
-var diagnosticInfoMapTs = path.join(parserDirectory, "diagnosticInformationMap.generated.ts");
-compileConfigFile(processDiagnosticMessagesJs, [], "./scripts/processDiagnosticMessages.tsconfig.json")
-
-var generatedDiagnosticMessagesJSON = path.join(parserDirectory, "diagnosticMessages.generated.json");
-var builtGeneratedDiagnosticMessagesJSON = path.join(builtLocalDirectory, "diagnosticMessages.generated.json");
-
-// Localize diagnostics script
-var generateLocalizedDiagnosticMessagesJs = path.join(scriptsDirectory, "generateLocalizedDiagnosticMessages.js");
-var generateLocalizedDiagnosticMessagesTs = path.join(scriptsDirectory, "generateLocalizedDiagnosticMessages.ts");
-
-file(generateLocalizedDiagnosticMessagesTs);
-compileFile(generateLocalizedDiagnosticMessagesJs,
-    [generateLocalizedDiagnosticMessagesTs],
-    [generateLocalizedDiagnosticMessagesTs],
-    [],
-    /*useBuiltCompiler*/ false, { noOutFile: true, types: ["node", "xml2js"] });
+}, { async: true });
 
-// Localize diagnostics
-file(generatedLCGFile, [generateLocalizedDiagnosticMessagesJs, diagnosticInfoMapTs, generatedDiagnosticMessagesJSON], function () {
-    var cmd = host + " " + generateLocalizedDiagnosticMessagesJs + " " + lclDirectory + " " + builtLocalDirectory + " " + generatedDiagnosticMessagesJSON;
-    console.log(cmd);
-    var ex = jake.createExec([cmd]);
-    // Add listeners for output and error
-    ex.addListener("stdout", function (output) {
-        process.stdout.write(output);
-    });
-    ex.addListener("stderr", function (error) {
-        process.stderr.write(error);
-    });
-    ex.addListener("cmdEnd", function () {
-        complete();
+desc("Runs all the tests in parallel using the built run.js file. Optional arguments are: t[ests]=category1|category2|... d[ebug]=true.");
+task(TaskNames.runtests, RunTestsPrereqs, function () {
+    tsbuild([ConfigFileFor.runjs], true, () => {
+        runConsoleTests('mocha-fivemat-progress-reporter', /*runInParallel*/ false);
     });
-    ex.run();
 }, { async: true });
 
-task("localize", [generatedLCGFile]);
-
-var buildProtocolTs = path.join(scriptsDirectory, "buildProtocol.ts");
-var buildProtocolJs = path.join(scriptsDirectory, "buildProtocol.js");
-var buildProtocolDts = path.join(builtLocalDirectory, "protocol.d.ts");
-var typescriptServicesDts = path.join(builtLocalDirectory, "typescriptServices.d.ts");
-
-file(buildProtocolTs);
-
-compileFile(buildProtocolJs,
-    [buildProtocolTs],
-    [buildProtocolTs],
-    [],
-    /*useBuiltCompiler*/ false,
-    { noOutFile: true, lib: "es6" });
-
-file(buildProtocolDts, [buildProtocolTs, buildProtocolJs, typescriptServicesDts], function () {
+desc("Generates a diagnostic file in TypeScript based on an input JSON file");
+task(TaskNames.generateDiagnostics, [Paths.diagnosticInformationMap]);
 
-    var protocolTs = path.join(serverDirectory, "protocol.ts");
+const libraryTargets = getLibraryTargets();
+desc("Builds the library targets");
+task(TaskNames.lib, libraryTargets);
 
-    var cmd = host + " " + buildProtocolJs + " " + protocolTs + " " + typescriptServicesDts + " " + buildProtocolDts;
-    console.log(cmd);
-    var ex = jake.createExec([cmd]);
-    // Add listeners for output and error
-    ex.addListener("stdout", function (output) {
-        process.stdout.write(output);
-    });
-    ex.addListener("stderr", function (error) {
-        process.stderr.write(error);
-    });
-    ex.addListener("cmdEnd", function () {
+desc("Builds internal scripts");
+task(TaskNames.scripts, [TaskNames.coreBuild], function() {
+    tsbuild([ConfigFileFor.scripts], true, () => {
         complete();
     });
-    ex.addListener("error", function (e, status) {
-        fail("Process exited with code " + status);
-    });
-    ex.run();
 }, { async: true });
 
-// The generated diagnostics map; built for the compiler and for the 'generate-diagnostics' task
-file(diagnosticInfoMapTs, [processDiagnosticMessagesJs, diagnosticMessagesJson], function () {
-    var cmd = host + " " + processDiagnosticMessagesJs + " " + diagnosticMessagesJson;
-    console.log(cmd);
-    var ex = jake.createExec([cmd]);
-    // Add listeners for output and error
-    ex.addListener("stdout", function (output) {
-        process.stdout.write(output);
-    });
-    ex.addListener("stderr", function (error) {
-        process.stderr.write(error);
-    });
-    ex.addListener("cmdEnd", function () {
+// Makes a new LKG. This target does not build anything, but errors if not all the outputs are present in the built/local directory
+desc("Makes a new LKG out of the built js files");
+task(TaskNames.lkg, [
+    TaskNames.scripts,
+    TaskNames.release,
+    TaskNames.local,
+    Paths.servicesDefinitionFile,
+    Paths.tsserverLibraryDefinitionFile,
+    ...libraryTargets
+], () => {
+    const sizeBefore = getDirSize(Paths.lkg);
+
+    exec(`${host} ${Paths.scripts.produceLKG}`, () => {
+        const sizeAfter = getDirSize(Paths.lkg);
+        if (sizeAfter > (sizeBefore * 1.10)) {
+            throw new Error("The lib folder increased by 10% or more. This likely indicates a bug.");
+        }
+    
         complete();
     });
-    ex.run();
 }, { async: true });
 
-file(builtGeneratedDiagnosticMessagesJSON, [generatedDiagnosticMessagesJSON], function () {
-    if (fs.existsSync(builtLocalDirectory)) {
-        jake.cpR(generatedDiagnosticMessagesJSON, builtGeneratedDiagnosticMessagesJSON);
-    }
+desc("Makes the most recent test results the new baseline, overwriting the old baseline");
+task("baseline-accept", function () {
+    acceptBaseline(Paths.baselines.local, Paths.baselines.reference);
 });
 
-desc("Generates a diagnostic file in TypeScript based on an input JSON file");
-task("generate-diagnostics", [diagnosticInfoMapTs]);
-
-// Publish nightly
-var configurePrereleaseJs = path.join(scriptsDirectory, "configurePrerelease.js");
-var configurePrereleaseTs = path.join(scriptsDirectory, "configurePrerelease.ts");
-var packageJson = "package.json";
-var versionFile = path.join(compilerDirectory, "core.ts");
-
-file(configurePrereleaseTs);
+desc("Makes the most recent rwc test results the new baseline, overwriting the old baseline");
+task("baseline-accept-rwc", function () {
+    acceptBaseline(Paths.baselines.localRwc, Paths.baselines.referenceRwc);
+});
 
-compileFile(/*outfile*/configurePrereleaseJs,
-            /*sources*/[configurePrereleaseTs],
-            /*prereqs*/[configurePrereleaseTs],
-            /*prefixes*/[],
-            /*useBuiltCompiler*/ false,
-    { noOutFile: true, generateDeclarations: false, keepComments: false, noResolve: false, stripInternal: false });
+desc("Makes the most recent test262 test results the new baseline, overwriting the old baseline");
+task("baseline-accept-test262", function () {
+    acceptBaseline(Paths.baselines.localTest262, Paths.baselines.referenceTest262);
+});
 
-task("setDebugMode", function () {
-    useDebugMode = true;
+desc("Runs tslint on the compiler sources. Optional arguments are: f[iles]=regex");
+task(TaskNames.lint, [TaskNames.buildRules], () => {
+    if (fold.isTravis()) console.log(fold.start("lint"));
+    function lint(project, cb) {
+        const fix = process.env.fix || process.env.f;
+        const cmd = `node node_modules/tslint/bin/tslint --project ${project} --formatters-dir ./built/local/tslint/formatters --format autolinkableStylish${fix ? " --fix" : ""}`;
+        exec(cmd, cb);
+    }
+    lint("scripts/tslint/tsconfig.json", () => lint("src/tsconfig-base.json", () => {
+        if (fold.isTravis()) console.log(fold.end("lint"));
+        complete();
+    }));
 });
 
-task("configure-nightly", [configurePrereleaseJs], function () {
-    var cmd = host + " " + configurePrereleaseJs + " dev " + packageJson + " " + versionFile;
-    console.log(cmd);
+desc("Diffs the compiler baselines using the diff tool specified by the 'DIFF' environment variable");
+task('diff', function () {
+    var cmd = `"${getDiffTool()} ${Paths.baselines.reference} ${Paths.baselines.local}`;
+    exec(cmd);
+}, { async: true });
+
+desc("Diffs the RWC baselines using the diff tool specified by the 'DIFF' environment variable");
+task('diff-rwc', function () {
+    var cmd = `"${getDiffTool()} ${Paths.baselines.referenceRwc} ${Paths.baselines.localRwc}`;
     exec(cmd);
 }, { async: true });
 
+task(TaskNames.configureNightly, [TaskNames.scripts], function () {
+    const cmd = `${host} ${Paths.scripts.configurePrerelease} dev ${Paths.packageJson} ${Paths.versionFile}`;
+    exec(cmd, () => complete());
+}, { async: true });
+
 desc("Configure, build, test, and publish the nightly release.");
-task("publish-nightly", ["configure-nightly", "LKG", "clean", "setDebugMode", "runtests-parallel"], function () {
+task(TaskNames.publishNightly, [TaskNames.coreBuild, TaskNames.configureNightly, TaskNames.lkg, "setDebugMode", "runtests-parallel"], function () {
     var cmd = "npm publish --tag next";
-    console.log(cmd);
-    exec(cmd);
-});
+    exec(cmd, () => complete());
+}, { async: true });
 
-task("configure-insiders", [configurePrereleaseJs], function () {
-    var cmd = host + " " + configurePrereleaseJs + " insiders " + packageJson + " " + versionFile;
-    console.log(cmd);
-    exec(cmd);
+task(TaskNames.configureInsiders, [TaskNames.scripts], function () {
+    const cmd = `${host} ${Paths.scripts.configurePrerelease} insiders ${Paths.packageJson} ${Paths.versionFile}`;
+    exec(cmd, () => complete());
 }, { async: true });
 
 desc("Configure, build, test, and publish the insiders release.");
-task("publish-insiders", ["configure-insiders", "LKG", "clean", "setDebugMode", "runtests-parallel"], function () {
+task(TaskNames.publishInsiders, [TaskNames.coreBuild, TaskNames.configureInsiders, TaskNames.lkg, "setDebugMode", "runtests-parallel"], function () {
     var cmd = "npm publish --tag insiders";
-    console.log(cmd);
-    exec(cmd);
-});
-
-var importDefinitelyTypedTestsDirectory = path.join(scriptsDirectory, "importDefinitelyTypedTests");
-var importDefinitelyTypedTestsJs = path.join(importDefinitelyTypedTestsDirectory, "importDefinitelyTypedTests.js");
-var importDefinitelyTypedTestsTs = path.join(importDefinitelyTypedTestsDirectory, "importDefinitelyTypedTests.ts");
-
-file(importDefinitelyTypedTestsTs);
-file(importDefinitelyTypedTestsJs, ["tsd-scripts", importDefinitelyTypedTestsTs], function () {
-    var cmd = host + " " + LKGCompiler + " -p " + importDefinitelyTypedTestsDirectory;
-    console.log(cmd);
-    exec(cmd);
+    exec(cmd, () => complete());
 }, { async: true });
 
-task("importDefinitelyTypedTests", [importDefinitelyTypedTestsJs], function () {
-    var cmd = host + " " + importDefinitelyTypedTestsJs + " ./ ../DefinitelyTyped";
-    console.log(cmd);
-    exec(cmd);
-}, { async: true });
+desc("Sets the release mode flag");
+task("release", function () {
+    useDebugMode = false;
+});
 
-var tscFile = path.join(builtLocalDirectory, "tsc.js");
-var cancellationTokenFile = path.join(builtLocalDirectory, "cancellationToken.js");
-var watchGuardFile = path.join(builtLocalDirectory, "watchGuard.js");
-var serverFile = path.join(builtLocalDirectory, "tsserver.js");
-var typingsInstallerFile = path.join(builtLocalDirectory, "typingsInstaller.js");
-var servicesFile = path.join(builtLocalDirectory, "typescriptServices.js");
-var standaloneDefinitionsFile = path.join(builtLocalDirectory, "typescriptServices.d.ts");
-var nodePackageFile = path.join(builtLocalDirectory, "typescript.js");
-var nodeDefinitionsFile = path.join(builtLocalDirectory, "typescript.d.ts");
-var nodeStandaloneDefinitionsFile = path.join(builtLocalDirectory, "typescript_standalone.d.ts");
-var tsserverLibraryFile = path.join(builtLocalDirectory, "tsserverlibrary.js");
-var tsserverLibraryDefinitionFile = path.join(builtLocalDirectory, "tsserverlibrary.d.ts");
-
-file(typescriptServicesDts, [servicesFile]);
-
-file(typesMapOutputPath, /** @type {*} */(function () {
-    var content = fs.readFileSync(path.join(serverDirectory, 'typesMap.json'));
-    // Validate that it's valid JSON
-    try {
-        JSON.parse(content.toString());
-    } catch (e) {
-        console.log("Parse error in typesMap.json: " + e);
-    }
-    fs.writeFileSync(typesMapOutputPath, content);
-}));
+desc("Clears the release mode flag");
+task("setDebugMode", function () {
+    useDebugMode = true;
+});
 
-// Local target to build the language service server library
-desc("Builds language service server library");
-task("lssl", [tsserverLibraryFile, tsserverLibraryDefinitionFile, typesMapOutputPath]);
+desc("Generates localized diagnostic messages");
+task(TaskNames.localize, [Paths.generatedLCGFile]);
 
 desc("Emit the start of the build fold");
-task("build-fold-start", [], function () {
+task(TaskNames.buildFoldStart, [], function () {
     if (fold.isTravis()) console.log(fold.start("build"));
 });
 
 desc("Emit the end of the build fold");
-task("build-fold-end", [], function () {
+task(TaskNames.buildFoldEnd, [], function () {
     if (fold.isTravis()) console.log(fold.end("build"));
 });
 
-// Local target to build the compiler and services
-desc("Builds the full compiler and services");
-task("local", ["build-fold-start", "generate-diagnostics", "lib",
-    tscFile,
-    servicesFile,
-    typingsInstallerFile,
-    cancellationTokenFile,
-    watchGuardFile,
-    nodeDefinitionsFile,
-    serverFile,
-    buildProtocolDts,
-    builtGeneratedDiagnosticMessagesJSON,
-    run,
-    "lssl", "localize", "build-fold-end"]);
-
-// Local target to build only tsc.js
-desc("Builds only the compiler");
-task("tsc", ["generate-diagnostics", "lib", tscFile]);
-
-// Local target to build the compiler and services
-desc("Sets release mode flag");
-task("release", function () {
-    useDebugMode = false;
-});
-
-// Set the default task to "local"
-task("default", ["local"]);
-
-// Cleans the built directory
-desc("Cleans the compiler output, declare files, and tests");
-task("clean", function () {
-    jake.rmRf(builtDirectory);
-});
-
-// Generate Markdown spec
-var word2mdJs = path.join(scriptsDirectory, "word2md.js");
-var word2mdTs = path.join(scriptsDirectory, "word2md.ts");
-var specWord = path.join(docDirectory, "TypeScript Language Specification.docx");
-var specMd = path.join(docDirectory, "spec.md");
-
-file(word2mdTs);
-
-// word2md script
-compileFile(word2mdJs,
-    [word2mdTs],
-    [word2mdTs],
-    [],
-    /*useBuiltCompiler*/ false,
-    {
-        lib: "scripthost,es5"
-    });
-
-// The generated spec.md; built for the 'generate-spec' task
-file(specMd, [word2mdJs, specWord], function () {
-    var specWordFullPath = path.resolve(specWord);
-    var specMDFullPath = path.resolve(specMd);
-    var cmd = "cscript //nologo " + word2mdJs + ' "' + specWordFullPath + '" ' + '"' + specMDFullPath + '"';
-    console.log(cmd);
-    child_process.exec(cmd, function () {
-        complete();
-    });
+desc("Compiles tslint rules to js");
+task(TaskNames.buildRules, [], function () {
+    tsbuild(ConfigFileFor.lint, false, () => complete());
 }, { async: true });
-
-
-desc("Generates a Markdown version of the Language Specification");
-task("generate-spec", [specMd]);
-
-
-// Makes a new LKG. This target does not build anything, but errors if not all the outputs are present in the built/local directory
-desc("Makes a new LKG out of the built js files");
-task("LKG", ["clean", "release", "local"].concat(libraryTargets), () => {
-    const sizeBefore = getDirSize(LKGDirectory);
-    var expectedFiles = [tscFile, servicesFile, serverFile, nodePackageFile, nodeDefinitionsFile, standaloneDefinitionsFile, tsserverLibraryFile, tsserverLibraryDefinitionFile, cancellationTokenFile, typingsInstallerFile, buildProtocolDts, watchGuardFile].
-        concat(libraryTargets).
-        concat(localizationTargets);
-    var missingFiles = expectedFiles.filter(f => !fs.existsSync(f));
-    if (missingFiles.length > 0) {
-        fail(new Error("Cannot replace the LKG unless all built targets are present in directory " + builtLocalDirectory +
-            ". The following files are missing:\n" + missingFiles.join("\n")));
-    }
-    // Copy all the targets into the LKG directory
-    jake.mkdirP(LKGDirectory);
-    expectedFiles.forEach(f => {
-        if (f.endsWith(".d.ts")) {
-            // remove-internal all the .d.ts files
-            jake.createExec([host, "node_modules/remove-internal/lib/cli.js", f, "--outdir", LKGDirectory]).run();
-        }
-        else {
-            jake.cpR(f, LKGDirectory);
-        }
-    });
-
-    /*
-    const sizeAfter = getDirSize(LKGDirectory);
-    if (sizeAfter > (sizeBefore * 1.10)) {
-        throw new Error("The lib folder increased by 10% or more. This likely indicates a bug.");
-    }*/
-
-});
-
-// Test directory
-directory(builtLocalDirectory);
-
-var internalTests = "internal/";
-
-var localBaseline = "tests/baselines/local/";
-var refBaseline = "tests/baselines/reference/";
-
-var localRwcBaseline = path.join(internalTests, "baselines/rwc/local");
-var refRwcBaseline = path.join(internalTests, "baselines/rwc/reference");
-
-var localTest262Baseline = path.join(internalTests, "baselines/test262/local");
-var refTest262Baseline = path.join(internalTests, "baselines/test262/reference");
-
-desc("Builds the test infrastructure using the built compiler");
-task("tests", ["local", run].concat(libraryTargets));
-
-function exec(cmd, completeHandler, errorHandler) {
-    var ex = jake.createExec([cmd], /** @type {jake.ExecOptions} */({ windowsVerbatimArguments: true, interactive: true }));
-    // Add listeners for output and error
-    ex.addListener("stdout", function (output) {
-        process.stdout.write(output);
-    });
-    ex.addListener("stderr", function (error) {
-        process.stderr.write(error);
-    });
-    ex.addListener("cmdEnd", function () {
-        if (completeHandler) {
-            completeHandler();
-        }
-        complete();
-    });
-    ex.addListener("error", function (e, status) {
-        if (errorHandler) {
-            errorHandler(e, status);
-        }
-        else {
-            fail("Process exited with code " + status);
-        }
+
+desc("Cleans the compiler output, declare files, and tests");
+task(TaskNames.clean, function () {
+    jake.rmRf(Paths.built);
+});
+
+desc("Generates the LCG file for localization");
+task("localize", [Paths.generatedLCGFile]);
+
+task(TaskNames.coreBuild, [Paths.diagnosticInformationMap, TaskNames.lib], function () {
+    tsbuild(ConfigFileFor.all, true, () => {
+        complete();
     });
+}, { async: true });
 
-    ex.run();
-}
+file(Paths.diagnosticMessagesJson);
 
-const del = require("del");
-function cleanTestDirs() {
-    // Clean the local baselines directory
-    if (fs.existsSync(localBaseline)) {
-        del.sync(localBaseline);
+file(Paths.typesMapOutput, /** @type {*} */(function () {
+    var content = readFileSync(path.join(Paths.srcServer, 'typesMap.json'));
+    // Validate that it's valid JSON
+    try {
+        JSON.parse(content);
+    } catch (e) {
+        console.log("Parse error in typesMap.json: " + e);
     }
+    fs.writeFileSync(Paths.typesMapOutput, content);
+}));
 
-    // Clean the local Rwc baselines directory
-    if (fs.existsSync(localRwcBaseline)) {
-        del.sync(localRwcBaseline);
+file(Paths.builtDiagnosticGeneratedJson, [Paths.diagnosticGeneratedJson], function () {
+    if (fs.existsSync(Paths.builtLocal)) {
+        jake.cpR(Paths.diagnosticGeneratedJson, Paths.builtDiagnosticGeneratedJson);
     }
+});
 
-    jake.mkdirP(localRwcBaseline);
-    jake.mkdirP(localTest262Baseline);
-    jake.mkdirP(localBaseline);
-}
+// Localized diagnostics
+file(Paths.generatedLCGFile, [TaskNames.scripts, Paths.diagnosticInformationMap, Paths.diagnosticGeneratedJson], function () {
+    const cmd = `${host} ${Paths.scripts.generateLocalizedDiagnosticMessages} ${Paths.lcl} ${Paths.builtLocal} ${Paths.diagnosticGeneratedJson}`
+    exec(cmd, complete);
+}, { async: true });
 
-// used to pass data from jake command line directly to run.js
-function writeTestConfigFile(tests, runners, light, taskConfigsFolder, workerCount, stackTraceLimit, colors, testTimeout) {
-    var testConfigContents = JSON.stringify({
-        runners: runners ? runners.split(",") : undefined,
-        test: tests ? [tests] : undefined,
-        light: light,
-        workerCount: workerCount,
-        taskConfigsFolder: taskConfigsFolder,
-        stackTraceLimit: stackTraceLimit,
-        noColor: !colors,
-        timeout: testTimeout
+
+// The generated diagnostics map; built for the compiler and for the 'generate-diagnostics' task
+file(Paths.diagnosticInformationMap, [Paths.diagnosticMessagesJson], function () {
+    tsbuild(ConfigFileFor.scripts, true, () => {
+        const cmd = `${host} ${Paths.scripts.processDiagnosticMessages} ${Paths.diagnosticMessagesJson}`;
+        exec(cmd, complete);
+    });
+}, { async: true });
+
+// tsserverlibrary.d.ts
+file(Paths.tsserverLibraryDefinitionFile, [TaskNames.coreBuild], function() {
+    const sources = ["compiler.d.ts", "jsTyping.d.ts", "services.d.ts", "server.d.ts"].map(f => path.join(Paths.builtLocal, f));
+    let output = "";
+    for (const f of sources) {
+        output = output + "\n" + removeConstModifierFromEnumDeclarations(readFileSync(f));
+    }
+    output = output + "\nexport = ts;\nexport as namespace ts;";
+    fs.writeFileSync(Paths.tsserverLibraryDefinitionFile, output, { encoding: "utf-8" });
+});
+
+// typescriptservices.d.ts
+file(Paths.servicesDefinitionFile, [TaskNames.coreBuild], function() {
+    // Generate a config file
+    const files = [];
+    recur(`src/services/tsconfig.json`);
+
+    const config = {
+        extends: "../../src/tsconfig-base",
+        compilerOptions: {
+            "stripInternal": true,
+            "outFile": "typescriptServices.js"
+        },
+        files
+    };
+    
+    const configFilePath = `built/local/typescriptServices.tsconfig.json`;
+    fs.writeFileSync(configFilePath, JSON.stringify(config, undefined, 2));
+    tsbuild(configFilePath, false, () => {
+        const servicesContent = readFileSync(Paths.servicesDefinitionFile);
+        const servicesContentWithoutConstEnums = removeConstModifierFromEnumDeclarations(servicesContent);
+        fs.writeFileSync(Paths.servicesDefinitionFile, servicesContentWithoutConstEnums);
+
+        // Also build typescript.d.ts
+        fs.writeFileSync(Paths.typescriptDefinitionFile, servicesContentWithoutConstEnums + "\r\nexport = ts", { encoding: "utf-8" });
+        // And typescript_standalone.d.ts
+        fs.writeFileSync(Paths.typescriptStandaloneDefinitionFile, servicesContentWithoutConstEnums.replace(/declare (namespace|module) ts(\..+)? \{/g, 'declare module "typescript" {'), { encoding: "utf-8"});
+
+        complete();
     });
-    fs.writeFileSync('test.config', testConfigContents);
-}
 
-function deleteTemporaryProjectOutput() {
-    if (fs.existsSync(path.join(localBaseline, "projectOutput/"))) {
-        jake.rmRf(path.join(localBaseline, "projectOutput/"));
+    function recur(configPath) {
+        const cfgFile = readJson(configPath);
+        if (cfgFile.references) {
+            for (const ref of cfgFile.references) {
+                recur(path.join(path.dirname(configPath), ref.path, "tsconfig.json"));
+            }
+        }
+        for (const file of cfgFile.files) {
+            files.push(path.join(`../../`, path.dirname(configPath), file));
+        }
     }
+}, { async: true });
+
+function getLibraryTargets() {
+    /** @type {{ libs: string[], paths?: Record<string, string>, sources?: Record<string, string[]> }} */
+    const libraries = readJson("./src/lib/libs.json");
+    return libraries.libs.map(function (lib) {
+        const relativeSources = ["header.d.ts"].concat(libraries.sources && libraries.sources[lib] || [lib + ".d.ts"]);
+        const relativeTarget = libraries.paths && libraries.paths[lib] || ("lib." + lib + ".d.ts");
+        const sources = [Paths.copyright].concat(relativeSources.map(s => path.join(Paths.library, s)));
+        const target = path.join(Paths.builtLocal, relativeTarget);
+        file(target, [Paths.builtLocal].concat(sources), function () {
+            concatenateFiles(target, sources);
+        });
+        return target;
+    });
 }
 
 function runConsoleTests(defaultReporter, runInParallel) {
@@ -802,22 +382,29 @@ function runConsoleTests(defaultReporter, runInParallel) {
         cleanTestDirs();
     }
 
-    var debug = process.env.debug || process.env["debug-brk"] || process.env.d;
-    var inspect = process.env.inspect || process.env["inspect-brk"] || process.env.i;
-    var testTimeout = process.env.timeout || defaultTestTimeout;
-    var runners = process.env.runners || process.env.runner || process.env.ru;
-    var tests = process.env.test || process.env.tests || process.env.t;
-    var light = process.env.light === undefined || process.env.light !== "false";
-    var stackTraceLimit = process.env.stackTraceLimit;
-    var testConfigFile = 'test.config';
+    let testTimeout = process.env.timeout || defaultTestTimeout;
+    const debug = process.env.debug || process.env["debug-brk"] || process.env.d;
+    const inspect = process.env.inspect || process.env["inspect-brk"] || process.env.i;
+    const runners = process.env.runners || process.env.runner || process.env.ru;
+    const tests = process.env.test || process.env.tests || process.env.t;
+    const light = process.env.light === undefined || process.env.light !== "false";
+    const stackTraceLimit = process.env.stackTraceLimit;
+    const colorsFlag = process.env.color || process.env.colors;
+    const colors = colorsFlag !== "false" && colorsFlag !== "0";
+    const reporter = process.env.reporter || process.env.r || defaultReporter;
+    const bail = process.env.bail || process.env.b;
+    const lintFlag = process.env.lint !== 'false';
+    const testConfigFile = 'test.config';
+
     if (fs.existsSync(testConfigFile)) {
         fs.unlinkSync(testConfigFile);
     }
-    var workerCount, taskConfigsFolder;
+
+    let workerCount, taskConfigsFolder;
     if (runInParallel) {
         // generate name to store task configuration files
-        var prefix = os.tmpdir() + "/ts-tests";
-        var i = 1;
+        const prefix = os.tmpdir() + "/ts-tests";
+        let i = 1;
         do {
             taskConfigsFolder = prefix + i;
             i++;
@@ -835,88 +422,65 @@ function runConsoleTests(defaultReporter, runInParallel) {
         writeTestConfigFile(tests, runners, light, taskConfigsFolder, workerCount, stackTraceLimit, colors, testTimeout);
     }
 
-    var colorsFlag = process.env.color || process.env.colors;
-    var colors = colorsFlag !== "false" && colorsFlag !== "0";
-    var reporter = process.env.reporter || process.env.r || defaultReporter;
-    var bail = process.env.bail || process.env.b;
-    var lintFlag = process.env.lint !== 'false';
-
     // timeout normally isn't necessary but Travis-CI has been timing out on compiler baselines occasionally
     // default timeout is 2sec which really should be enough, but maybe we just need a small amount longer
     if (!runInParallel) {
-        var startTime = mark();
+        var startTime = Travis.mark();
         var args = [];
         args.push("-R", reporter);
-        if (tests) {
-            args.push("-g", `"${tests}"`);
-        }
-        if (colors) {
-            args.push("--colors");
-        }
-        else {
-            args.push("--no-colors");
-        }
-        if (bail) {
-            args.push("--bail");
-        }
+        if (tests) args.push("-g", `"${tests}"`);
+        args.push(colors ? "--colors" : "--no-colors");
+        if (bail) args.push("--bail");
         if (inspect) {
             args.unshift("--inspect-brk");
-        }
-        else if (debug) {
-            args.unshift("--debug-brk");
-        }
-        else {
+        } else {
             args.push("-t", testTimeout);
         }
-        args.push(run);
+        args.push(Paths.builtLocalRun);
 
         var cmd = "mocha " + args.join(" ");
-        console.log(cmd);
-
         var savedNodeEnv = process.env.NODE_ENV;
         process.env.NODE_ENV = "development";
         exec(cmd, function () {
             process.env.NODE_ENV = savedNodeEnv;
-            measure(startTime);
-            runLinter();
+            Travis.measure(startTime);
+            runLinterAndComplete();
             finish();
         }, function (e, status) {
             process.env.NODE_ENV = savedNodeEnv;
-            measure(startTime);
+            Travis.measure(startTime);
             finish(status);
         });
-
     }
     else {
         var savedNodeEnv = process.env.NODE_ENV;
         process.env.NODE_ENV = "development";
-        var startTime = mark();
-        exec(host + " " + run, function () {
+        var startTime = Travis.mark();
+        const cmd = `${host} ${Paths.builtLocalRun}`;
+        exec(cmd, function () {
+            // Tests succeeded; run 'lint' task
             process.env.NODE_ENV = savedNodeEnv;
-            measure(startTime);
-            runLinter();
-            finish();
+            Travis.measure(startTime);
+            runLinterAndComplete();
         }, function (e, status) {
+            // Tests failed
             process.env.NODE_ENV = savedNodeEnv;
-            measure(startTime);
+            Travis.measure(startTime);
             finish(status);
         });
     }
 
-    function failWithStatus(status) {
-        fail("Process exited with code " + status);
-    }
-
     function finish(errorStatus) {
         deleteTemporaryProjectOutput();
         if (errorStatus !== undefined) {
-            failWithStatus(errorStatus);
+            fail("Process exited with code " + errorStatus);
         }
         else {
             complete();
         }
     }
-    function runLinter() {
+
+    function runLinterAndComplete() {
         if (!lintFlag || dirty) {
             return;
         }
@@ -926,97 +490,128 @@ function runConsoleTests(defaultReporter, runInParallel) {
         });
         lint.invoke();
     }
+
+    function deleteTemporaryProjectOutput() {
+        if (fs.existsSync(path.join(Paths.baselines.local, "projectOutput/"))) {
+            jake.rmRf(path.join(Paths.baselines.local, "projectOutput/"));
+        }
+    }
 }
 
-desc("Runs all the tests in parallel using the built run.js file. Optional arguments are: t[ests]=category1|category2|... d[ebug]=true.");
-task("runtests-parallel", ["build-rules", "tests", builtLocalDirectory, run], function () {
-    runConsoleTests('min', /*runInParallel*/ true);
-}, { async: true });
+// used to pass data from jake command line directly to run.js
+function writeTestConfigFile(tests, runners, light, taskConfigsFolder, workerCount, stackTraceLimit, colors, testTimeout) {
+    var testConfigContents = JSON.stringify({
+        runners: runners ? runners.split(",") : undefined,
+        test: tests ? [tests] : undefined,
+        light: light,
+        workerCount: workerCount,
+        taskConfigsFolder: taskConfigsFolder,
+        stackTraceLimit: stackTraceLimit,
+        noColor: !colors,
+        timeout: testTimeout
+    });
+    fs.writeFileSync('test.config', testConfigContents, { encoding: "utf-8" });
+}
 
-desc("Runs the tests using the built run.js file. Optional arguments are: t[ests]=regex r[eporter]=[list|spec|json|<more>] d[ebug]=true color[s]=false lint=true bail=false dirty=false.");
-task("runtests", ["build-rules", "tests", builtLocalDirectory, run], function () {
-    runConsoleTests('mocha-fivemat-progress-reporter', /*runInParallel*/ false);
-}, { async: true });
+function cleanTestDirs() {
+    // Clean the local baselines directory
+    if (fs.existsSync(Paths.baselines.local)) {
+        del.sync(Paths.baselines.local);
+    }
 
-desc("Generates code coverage data via instanbul");
-task("generate-code-coverage", ["tests", builtLocalDirectory], function () {
-    var testTimeout = process.env.timeout || defaultTestTimeout;
-    var cmd = 'istanbul cover node_modules/mocha/bin/_mocha -- -R min -t ' + testTimeout + ' ' + run;
-    console.log(cmd);
-    exec(cmd);
-}, { async: true });
+    // Clean the local Rwc baselines directory
+    if (fs.existsSync(Paths.baselines.localRwc)) {
+        del.sync(Paths.baselines.localRwc);
+    }
 
-// Browser tests
-var nodeServerOutFile = "tests/webTestServer.js";
-var nodeServerInFile = "tests/webTestServer.ts";
-compileFile(nodeServerOutFile, [nodeServerInFile], [builtLocalDirectory, tscFile], [], /*useBuiltCompiler:*/ true, { noOutFile: true, lib: "es6" });
+    jake.mkdirP(Paths.baselines.local);
+    jake.mkdirP(Paths.baselines.localTest262);
+}
 
-desc("Runs browserify on run.js to produce a file suitable for running tests in the browser");
-task("browserify", [], function () {
-    // Shell out to `gulp`, since we do the work to handle sourcemaps correctly w/o inline maps there
-    var cmd = 'gulp browserify --silent';
-    exec(cmd);
-}, { async: true });
+function tsbuild(tsconfigPath, useLkg = true, done = undefined) {
+    const startCompileTime = Travis.mark();
+    const compilerPath = useLkg ? Paths.lkgCompiler : Paths.builtLocalCompiler;
+    const cmd = `${host} ${compilerPath} -b ${Array.isArray(tsconfigPath) ? tsconfigPath.join(" ") : tsconfigPath}`;
+
+    exec(cmd, () => {
+        // Success
+        Travis.measure(startCompileTime);
+        done ? done() : complete();
+    }, () => {
+        // Fail
+        Travis.measure(startCompileTime);
+        fail(`Compilation of ${tsconfigPath} unsuccessful`);
+    });
+}
 
-desc("Runs the tests using the built run.js file like 'jake runtests'. Syntax is jake runtests-browser. Additional optional parameters tests=[regex], browser=[chrome|IE]");
-task("runtests-browser", ["browserify", nodeServerOutFile], function () {
-    cleanTestDirs();
-    host = "node";
-    var browser = process.env.browser || process.env.b || (os.platform() === "win32" ? "edge" : "chrome");
-    var runners = process.env.runners || process.env.runner || process.env.ru;
-    var tests = process.env.test || process.env.tests || process.env.t;
-    var light = process.env.light || false;
-    var testConfigFile = 'test.config';
-    if (fs.existsSync(testConfigFile)) {
-        fs.unlinkSync(testConfigFile);
-    }
-    if (tests || runners || light) {
-        writeTestConfigFile(tests, runners, light);
+const Travis = {
+    mark() {
+        if (!fold.isTravis()) return;
+        var stamp = process.hrtime();
+        var id = Math.floor(Math.random() * 0xFFFFFFFF).toString(16);
+        console.log("travis_time:start:" + id + "\r");
+        return {
+            stamp: stamp,
+            id: id
+        };
+    },
+    measure(marker) {
+        if (!fold.isTravis()) return;
+        var diff = process.hrtime(marker.stamp);
+        var total = [marker.stamp[0] + diff[0], marker.stamp[1] + diff[1]];
+        console.log("travis_time:end:" + marker.id + ":start=" + toNs(marker.stamp) + ",finish=" + toNs(total) + ",duration=" + toNs(diff) + "\r");
     }
+};
+
+function buildLocalizedTargets() {
+    /**
+     * The localization target produces the two following transformations:
+     *    1. 'src\loc\lcl\<locale>\diagnosticMessages.generated.json.lcl' => 'built\local\<locale>\diagnosticMessages.generated.json'
+     *       convert localized resources into a .json file the compiler can understand
+     *    2. 'src\compiler\diagnosticMessages.generated.json' => 'built\local\ENU\diagnosticMessages.generated.json.lcg'
+     *       generate the lcg file (source of messages to localize) from the diagnosticMessages.generated.json
+     */
+    const localizationTargets = ["cs", "de", "es", "fr", "it", "ja", "ko", "pl", "pt-br", "ru", "tr", "zh-cn", "zh-tw"]
+        .map(f => path.join(Paths.builtLocal,f))
+        .concat(path.dirname(Paths.generatedLCGFile));
+}
 
-    tests = tests ? tests : '';
-    var cmd = host + " tests/webTestServer.js " + browser + " " + JSON.stringify(tests);
-    console.log(cmd);
-    exec(cmd);
-}, { async: true });
-
-function getDiffTool() {
-    var program = process.env['DIFF'];
-    if (!program) {
-        fail("Add the 'DIFF' environment variable to the path of the program you want to use.");
-    }
-    return program;
+function toNs(diff) {
+    return diff[0] * 1e9 + diff[1];
 }
 
-// Baseline Diff
-desc("Diffs the compiler baselines using the diff tool specified by the 'DIFF' environment variable");
-task('diff', function () {
-    var cmd = '"' + getDiffTool() + '" ' + refBaseline + ' ' + localBaseline;
-    console.log(cmd);
-    exec(cmd);
-}, { async: true });
+function exec(cmd, successHandler, errorHandler) {
+    var ex = jake.createExec([cmd], /** @type {jake.ExecOptions} */({ windowsVerbatimArguments: true, interactive: true }));
+    // Add listeners for output and error
+    ex.addListener("stdout", function (output) {
+        process.stdout.write(output);
+    });
+    ex.addListener("stderr", function (error) {
+        process.stderr.write(error);
+    });
+    ex.addListener("cmdEnd", function () {
+        if (successHandler) {
+            successHandler();
+        }
+    });
+    ex.addListener("error", function (e, status) {
+        if (errorHandler) {
+            errorHandler(e, status);
+        }
+        else {
+            fail("Process exited with code " + status);
+        }
+    });
 
-desc("Diffs the RWC baselines using the diff tool specified by the 'DIFF' environment variable");
-task('diff-rwc', function () {
-    var cmd = '"' + getDiffTool() + '" ' + refRwcBaseline + ' ' + localRwcBaseline;
     console.log(cmd);
-    exec(cmd);
-}, { async: true });
-
-desc("Builds the test sources and automation in debug mode");
-task("tests-debug", ["setDebugMode", "tests"]);
-
-
-// Makes the test results the new baseline
-desc("Makes the most recent test results the new baseline, overwriting the old baseline");
-task("baseline-accept", function () {
-    acceptBaseline(localBaseline, refBaseline);
-});
+    ex.run();
+}
 
 function acceptBaseline(sourceFolder, targetFolder) {
     console.log('Accept baselines from ' + sourceFolder + ' to ' + targetFolder);
     var deleteEnding = '.delete';
 
+    jake.mkdirP(targetFolder);
     acceptBaselineFolder(sourceFolder, targetFolder);
 
     function acceptBaselineFolder(sourceFolder, targetFolder) {
@@ -1047,124 +642,86 @@ function acceptBaseline(sourceFolder, targetFolder) {
     }
 }
 
-desc("Makes the most recent rwc test results the new baseline, overwriting the old baseline");
-task("baseline-accept-rwc", function () {
-    acceptBaseline(localRwcBaseline, refRwcBaseline);
-});
-
-desc("Makes the most recent test262 test results the new baseline, overwriting the old baseline");
-task("baseline-accept-test262", function () {
-    acceptBaseline(localTest262Baseline, refTest262Baseline);
-});
-
-
-// Webhost
-var webhostPath = "tests/webhost/webtsc.ts";
-var webhostJsPath = "tests/webhost/webtsc.js";
-compileFile(webhostJsPath, [webhostPath], [tscFile, webhostPath].concat(libraryTargets), [], /*useBuiltCompiler*/true);
-
-desc("Builds the tsc web host");
-task("webhost", [webhostJsPath], function () {
-    jake.cpR(path.join(builtLocalDirectory, "lib.d.ts"), "tests/webhost/", { silent: true });
-});
-
-// Perf compiler
-var perftscPath = "tests/perftsc.ts";
-var perftscJsPath = "built/local/perftsc.js";
-compileFile(perftscJsPath, [perftscPath], [tscFile, perftscPath, "tests/perfsys.ts"].concat(libraryTargets), [], /*useBuiltCompiler*/ true);
-desc("Builds augmented version of the compiler for perf tests");
-task("perftsc", [perftscJsPath]);
-
-// Instrumented compiler
-var loggedIOpath = harnessDirectory + 'loggedIO.ts';
-var loggedIOJsPath = builtLocalDirectory + 'loggedIO.js';
-file(loggedIOJsPath, [builtLocalDirectory, loggedIOpath], function () {
-    var temp = builtLocalDirectory + 'temp';
-    jake.mkdirP(temp);
-    var options = "--target es5 --lib es6 --types --outdir " + temp + ' ' + loggedIOpath;
-    var cmd = host + " " + LKGDirectory + compilerFilename + " " + options + " ";
-    console.log(cmd + "\n");
-    var ex = jake.createExec([cmd]);
-    ex.addListener("cmdEnd", function () {
-        fs.renameSync(temp + '/harness/loggedIO.js', loggedIOJsPath);
-        jake.rmRf(temp);
-        complete();
-    });
-    ex.run();
-}, { async: true });
-
-var instrumenterPath = harnessDirectory + 'instrumenter.ts';
-var instrumenterJsPath = builtLocalDirectory + 'instrumenter.js';
-compileFile(instrumenterJsPath, [instrumenterPath], [tscFile, instrumenterPath].concat(libraryTargets), [], /*useBuiltCompiler*/ true, { lib: "es6", types: ["node"], noOutFile: true, outDir: builtLocalDirectory });
+/** @param jsonPath {string} */
+function readJson(jsonPath) {
+    const jsonText = readFileSync(jsonPath);
+    const result = ts.parseConfigFileTextToJson(jsonPath, jsonText);
+    if (result.error) {
+        reportDiagnostics([result.error]);
+        throw new Error("An error occurred during parse.");
+    }
+    return result.config;
+}
 
-desc("Builds an instrumented tsc.js - run with test=[testname]");
-task('tsc-instrumented', [loggedIOJsPath, instrumenterJsPath, tscFile], function () {
-    var test = process.env.test || process.env.tests || process.env.t || "iocapture";
-    var cmd = host + ' ' + instrumenterJsPath + " record " + test + " " + builtLocalDirectory + compilerFilename;
-    console.log(cmd);
-    var ex = jake.createExec([cmd]);
-    ex.addListener("cmdEnd", function () {
-        complete();
-    });
-    ex.run();
-}, { async: true });
+/** @param diagnostics {ts.Diagnostic[]} */
+function reportDiagnostics(diagnostics) {
+    console.log(diagnosticsToString(diagnostics, process.stdout.isTTY));
+}
 
-desc("Updates the sublime plugin's tsserver");
-task("update-sublime", ["local", serverFile], function () {
-    jake.cpR(serverFile, "../TypeScript-Sublime-Plugin/tsserver/");
-    jake.cpR(serverFile + ".map", "../TypeScript-Sublime-Plugin/tsserver/");
-});
+/**
+ * @param diagnostics {ts.Diagnostic[]}
+ * @param [pretty] {boolean}
+ */
+function diagnosticsToString(diagnostics, pretty) {
+    const host = {
+        getCurrentDirectory() { return process.cwd(); },
+        getCanonicalFileName(fileName) { return fileName; },
+        getNewLine() { return os.EOL; }
+    };
+    return pretty ? ts.formatDiagnosticsWithColorAndContext(diagnostics, host) :
+        ts.formatDiagnostics(diagnostics, host);
+}
 
-var tslintRuleDir = "scripts/tslint/rules";
-var tslintRules = fs.readdirSync(tslintRuleDir);
-var tslintRulesFiles = tslintRules.map(function (p) {
-    return path.join(tslintRuleDir, p);
-});
-var tslintRulesOutFiles = tslintRules.map(function (p) {
-    return path.join(builtLocalDirectory, "tslint/rules", p.replace(".ts", ".js"));
-});
-var tslintFormattersDir = "scripts/tslint/formatters";
-var tslintFormatters = [
-    "autolinkableStylishFormatter",
-];
-var tslintFormatterFiles = tslintFormatters.map(function (p) {
-    return path.join(tslintFormattersDir, p + ".ts");
-});
-var tslintFormattersOutFiles = tslintFormatters.map(function (p) {
-    return path.join(builtLocalDirectory, "tslint/formatters", p + ".js");
-});
-desc("Compiles tslint rules to js");
-task("build-rules", ["build-rules-start"].concat(tslintRulesOutFiles).concat(tslintFormattersOutFiles).concat(["build-rules-end"]));
-tslintRulesFiles.forEach(function (ruleFile, i) {
-    compileFile(tslintRulesOutFiles[i], [ruleFile], [ruleFile], [], /*useBuiltCompiler*/ false,
-        { noOutFile: true, generateDeclarations: false, outDir: path.join(builtLocalDirectory, "tslint/rules"), lib: "es6" });
-});
-tslintFormatterFiles.forEach(function (ruleFile, i) {
-    compileFile(tslintFormattersOutFiles[i], [ruleFile], [ruleFile], [], /*useBuiltCompiler*/ false,
-        { noOutFile: true, generateDeclarations: false, outDir: path.join(builtLocalDirectory, "tslint/formatters"), lib: "es6" });
-});
+/**
+ * Concatenate a list of sourceFiles to a destinationFile
+ * @param {string} destinationFile 
+ * @param {string[]} sourceFiles 
+ * @param {string} extraContent
+ */
+function concatenateFiles(destinationFile, sourceFiles, extraContent) {
+    var temp = "temptemp";
+    // append all files in sequence
+    var text = "";
+    for (var i = 0; i < sourceFiles.length; i++) {
+        if (!fs.existsSync(sourceFiles[i])) {
+            fail(sourceFiles[i] + " does not exist!");
+        }
+        if (i > 0) { text += "\n\n"; }
+        text += readFileSync(sourceFiles[i]).replace(/\r?\n/g, "\n");
+    }
+    if (extraContent) {
+        text += extraContent;
+    }
+    fs.writeFileSync(temp, text);
+    // Move the file to the final destination
+    fs.renameSync(temp, destinationFile);
+}
 
-desc("Emit the start of the build-rules fold");
-task("build-rules-start", [], function () {
-    if (fold.isTravis()) console.log(fold.start("build-rules"));
-});
+function appendToFile(path, content) {
+    fs.writeFileSync(path, readFileSync(path) + "\r\n" + content);
+}
 
-desc("Emit the end of the build-rules fold");
-task("build-rules-end", [], function () {
-    if (fold.isTravis()) console.log(fold.end("build-rules"));
-});
+/**
+ * 
+ * @param {string} path 
+ * @returns string
+ */
+function readFileSync(path) {
+    return fs.readFileSync(path, { encoding: "utf-8" });
+}
 
-desc("Runs tslint on the compiler sources. Optional arguments are: f[iles]=regex");
-task("lint", ["build-rules"], () => {
-    if (fold.isTravis()) console.log(fold.start("lint"));
-    function lint(project, cb) {
-        const fix = process.env.fix || process.env.f;
-        const cmd = `node node_modules/tslint/bin/tslint --project ${project} --formatters-dir ./built/local/tslint/formatters --format autolinkableStylish${fix ? " --fix" : ""}`;
-        console.log("Linting: " + cmd);
-        jake.exec([cmd], cb, /** @type {jake.ExecOptions} */({ interactive: true, windowsVerbatimArguments: true }));
+function getDiffTool() {
+    var program = process.env['DIFF'];
+    if (!program) {
+        fail("Add the 'DIFF' environment variable to the path of the program you want to use.");
     }
-    lint("scripts/tslint/tsconfig.json", () => lint("src/tsconfig-base.json", () => {
-        if (fold.isTravis()) console.log(fold.end("lint"));
-        complete();
-    }));
-});
+    return program;
+}
+
+/**
+ * Replaces const enum declarations with non-const enums
+ * @param {string} text 
+ */
+function removeConstModifierFromEnumDeclarations(text) {
+    return text.replace(/^(\s*)(export )?const enum (\S+) {(\s*)$/gm, '$1$2enum $3 {$4');
+}
diff --git a/lib/.gitattributes b/lib/.gitattributes
index fcadb2cf97913..07764a78d9844 100644
--- a/lib/.gitattributes
+++ b/lib/.gitattributes
@@ -1 +1 @@
-* text eol=lf
+* text eol=lf
\ No newline at end of file
diff --git a/lib/cancellationToken.js b/lib/cancellationToken.js
index 39000bb9f7d3c..d63145f3fc5a0 100644
--- a/lib/cancellationToken.js
+++ b/lib/cancellationToken.js
@@ -13,6 +13,7 @@ See the Apache Version 2.0 License for specific language governing permissions
 and limitations under the License.
 ***************************************************************************** */
 
+
 "use strict";
 var fs = require("fs");
 function pipeExists(name) {
diff --git a/lib/pt-br/diagnosticMessages.generated.json b/lib/pt-br/diagnosticMessages.generated.json
index adf2f83faf51e..e4afa14afb7e1 100644
--- a/lib/pt-br/diagnosticMessages.generated.json
+++ b/lib/pt-br/diagnosticMessages.generated.json
@@ -49,6 +49,8 @@
   "A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged_2434": "Uma declaração de namespace não pode estar localizada antes de uma classe ou função com a qual ela é mesclada.",
   "A_namespace_declaration_is_only_allowed_in_a_namespace_or_module_1235": "Uma declaração de namespace só é permitida e um namespace ou módulo.",
   "A_namespace_style_import_cannot_be_called_or_constructed_and_will_cause_a_failure_at_runtime_7038": "Uma importação de estilo do namespace não pode ser chamada nem construída e causará uma falha no tempo de execução.",
+  "A_non_dry_build_would_build_project_0_6357": "A non-dry build would build project '{0}'",
+  "A_non_dry_build_would_delete_the_following_files_Colon_0_6356": "A non-dry build would delete the following files: {0}",
   "A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation_2371": "Um inicializador de parâmetro só é permitido em uma implementação de função ou de construtor.",
   "A_parameter_property_cannot_be_declared_using_a_rest_parameter_1317": "Uma propriedade de parâmetro não pode ser declarada usando um parâmetro rest.",
   "A_parameter_property_is_only_allowed_in_a_constructor_implementation_2369": "Uma propriedade de parâmetro somente é permitida em uma implementação de construtor.",
@@ -189,6 +191,9 @@
   "Binary_digit_expected_1177": "Dígito binário esperado.",
   "Binding_element_0_implicitly_has_an_1_type_7031": "O elemento de associação '{0}' tem implicitamente um tipo '{1}'.",
   "Block_scoped_variable_0_used_before_its_declaration_2448": "Variável de escopo de bloco '{0}' usada antes da sua declaração.",
+  "Build_all_projects_including_those_that_appear_to_be_up_to_date_6368": "Build all projects, including those that appear to be up to date",
+  "Build_one_or_more_projects_and_their_dependencies_if_out_of_date_6364": "Build one or more projects and their dependencies, if out of date",
+  "Building_project_0_6358": "Building project '{0}'...",
   "Call_decorator_expression_90028": "Chamar expressão do decorador",
   "Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type_7020": "Assinatura de chamada, que não tem a anotação de tipo de retorno, implicitamente tem um tipo de retorno 'any'.",
   "Call_target_does_not_contain_any_signatures_2346": "O destino da chamada não contém nenhuma assinatura.",
@@ -208,7 +213,7 @@
   "Cannot_find_a_tsconfig_json_file_at_the_specified_directory_Colon_0_5057": "Não é possível encontrar um arquivo tsconfig.json no diretório especificado: '{0}'.",
   "Cannot_find_global_type_0_2318": "Não é possível encontrar o tipo global '{0}'.",
   "Cannot_find_global_value_0_2468": "Não é possível encontrar o valor global '{0}'.",
-  "Cannot_find_lib_definition_for_0_2726": "Cannot find lib definition for '{0}'.",
+  "Cannot_find_lib_definition_for_0_2726": "Não é possível encontrar a definição de lib para '{0}'.",
   "Cannot_find_lib_definition_for_0_Did_you_mean_1_2727": "Cannot find lib definition for '{0}'. Did you mean '{1}'?",
   "Cannot_find_module_0_2307": "Não é possível encontrar o módulo '{0}'.",
   "Cannot_find_name_0_2304": "Não é possível encontrar o nome '{0}'.",
@@ -304,6 +309,7 @@
   "Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name_1207": "Os decoradores não podem ser aplicados a vários acessadores get/set de mesmo nome.",
   "Default_export_of_the_module_has_or_is_using_private_name_0_4082": "A exportação padrão do módulo tem ou está usando o nome particular '{0}'.",
   "Delete_all_unused_declarations_95024": "Excluir todas as declarações não usadas",
+  "Delete_the_outputs_of_all_projects_6365": "Delete the outputs of all projects",
   "Deprecated_Use_jsxFactory_instead_Specify_the_object_invoked_for_createElement_when_targeting_react__6084": "[Preterido] Use '--jsxFactory' no lugar. Especifique o objeto invocado para createElement ao direcionar uma emissão de JSX 'react'",
   "Deprecated_Use_outFile_instead_Concatenate_and_emit_output_to_single_file_6170": "[Preterido] Use '--outFile' no lugar. Concatene e emita uma saída para um arquivo único",
   "Deprecated_Use_skipLibCheck_instead_Skip_type_checking_of_default_library_declaration_files_6160": "[Preterido] Use '--skipLibCheck' no lugar. Ignore a verificação de tipo dos arquivos de declaração de biblioteca padrão.",
@@ -354,6 +360,7 @@
   "Enable_strict_checking_of_property_initialization_in_classes_6187": "Habilite a verificação estrita de inicialização de propriedade nas classes.",
   "Enable_strict_null_checks_6113": "Habilite verificações nulas estritas.",
   "Enable_tracing_of_the_name_resolution_process_6085": "Habilite o rastreio do processo de resolução de nome.",
+  "Enable_verbose_logging_6366": "Enable verbose logging",
   "Enables_emit_interoperability_between_CommonJS_and_ES_Modules_via_creation_of_namespace_objects_for__7037": "Permite emissão de interoperabilidade entre CommonJS e Módulos ES através da criação de objetos de namespace para todas as importações. Implica em 'allowSyntheticDefaultImports'.",
   "Enables_experimental_support_for_ES7_async_functions_6068": "Habilita o suporte experimental para funções assíncronas de ES7.",
   "Enables_experimental_support_for_ES7_decorators_6065": "Habilita o suporte experimental para decoradores ES7.",
@@ -615,10 +622,12 @@
   "Option_0_cannot_be_specified_without_specifying_option_1_5052": "A opção '{0}' não pode ser especificada sem especificar a opção '{1}'.",
   "Option_0_cannot_be_specified_without_specifying_option_1_or_option_2_5069": "A opção '{0}' não pode ser especificada sem especificar a opção '{1}' ou a opção '{2}'.",
   "Option_0_should_have_array_of_strings_as_a_value_6103": "A opção '{0}' deve ter matriz de cadeias de um valor.",
+  "Option_build_must_be_the_first_command_line_argument_6369": "Option '--build' must be the first command line argument.",
   "Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES_5047": "A opção 'isolatedModules' só pode ser usada quando nenhuma opção de '--module' for fornecida ou a opção 'target' for 'ES2015' ou superior.",
   "Option_paths_cannot_be_used_without_specifying_baseUrl_option_5060": "A opção 'paths' não pode ser usada sem se especificar a opção '--baseUrl'.",
   "Option_project_cannot_be_mixed_with_source_files_on_a_command_line_5042": "A opção 'project' não pode ser mesclada com arquivos de origem em uma linha de comando.",
   "Option_resolveJsonModule_cannot_be_specified_without_node_module_resolution_strategy_5070": "A opção '--resolveJsonModule' não pode ser especificada sem a estratégia de resolução de módulo de 'nó'.",
+  "Options_0_and_1_cannot_be_combined_6370": "Options '{0}' and '{1}' cannot be combined.",
   "Options_Colon_6027": "Opções:",
   "Output_directory_for_generated_declaration_files_6166": "Diretório de saída para os arquivos de declaração gerados.",
   "Output_file_0_from_project_1_does_not_exist_6309": "O arquivo de saída '{0}' do projeto '{1}' não existe",
@@ -666,7 +675,15 @@
   "Print_names_of_generated_files_part_of_the_compilation_6154": "Nomes de impressão das partes dos arquivos gerados da compilação.",
   "Print_the_compiler_s_version_6019": "Imprima a versão do compilador.",
   "Print_this_message_6017": "Imprima esta mensagem.",
+  "Project_0_can_t_be_built_because_its_dependency_1_has_errors_6363": "Project '{0}' can't be built because its dependency '{1}' has errors",
+  "Project_0_is_out_of_date_because_its_dependency_1_is_out_of_date_6353": "Project '{0}' is out of date because its dependency '{1}' is out of date",
+  "Project_0_is_out_of_date_because_oldest_output_1_is_older_than_newest_input_2_6350": "Project '{0}' is out of date because oldest output '{1}' is older than newest input '{2}'",
+  "Project_0_is_out_of_date_because_output_file_1_does_not_exist_6352": "Project '{0}' is out of date because output file '{1}' does not exist",
+  "Project_0_is_up_to_date_6361": "Project '{0}' is up to date",
+  "Project_0_is_up_to_date_because_newest_input_1_is_older_than_oldest_output_2_6351": "Project '{0}' is up to date because newest input '{1}' is older than oldest output '{2}'",
+  "Project_0_is_up_to_date_with_d_ts_files_from_its_dependencies_6354": "Project '{0}' is up to date with .d.ts files from its dependencies",
   "Project_references_may_not_form_a_circular_graph_Cycle_detected_Colon_0_6202": "Referências de projeto não podem formar um gráfico circular. Ciclo detectado: {0}",
+  "Projects_in_this_build_Colon_0_6355": "Projects in this build: {0}",
   "Projects_to_reference_6300": "Projetos para referência",
   "Property_0_does_not_exist_on_const_enum_1_2479": "A propriedade '{0}' não existe na enumeração 'const' '{1}'.",
   "Property_0_does_not_exist_on_type_1_2339": "A propriedade '{0}' não existe no tipo '{1}'.",
@@ -780,8 +797,11 @@
   "Show_all_compiler_options_6169": "Mostrar todas as opções do compilador.",
   "Show_diagnostic_information_6149": "Mostras as informações de diagnóstico.",
   "Show_verbose_diagnostic_information_6150": "Mostras as informações detalhadas de diagnóstico.",
+  "Show_what_would_be_built_or_deleted_if_specified_with_clean_6367": "Show what would be built (or deleted, if specified with '--clean')",
   "Signature_0_must_be_a_type_predicate_1224": "A assinatura '{0}' deve ser um predicado de tipo.",
   "Skip_type_checking_of_declaration_files_6012": "Ignorar a verificação de tipo dos arquivos de declaração.",
+  "Skipping_build_of_project_0_because_its_dependency_1_has_errors_6362": "Skipping build of project '{0}' because its dependency '{1}' has errors",
+  "Skipping_clean_because_not_all_projects_could_be_located_6371": "Skipping clean because not all projects could be located",
   "Source_Map_Options_6175": "Opções do Sourcemap",
   "Specialized_overload_signature_is_not_assignable_to_any_non_specialized_signature_2382": "A assinatura de sobrecarga especializada não pode ser atribuída a qualquer assinatura não especializada.",
   "Specifier_of_dynamic_import_cannot_be_spread_element_1325": "O especificador de importação dinâmica não pode ser o elemento de difusão.",
@@ -957,6 +977,7 @@
   "Unterminated_template_literal_1160": "Literal de modelo não finalizado.",
   "Untyped_function_calls_may_not_accept_type_arguments_2347": "Chamadas de função não tipadas não podem aceitar argumentos de tipo.",
   "Unused_label_7028": "Rótulo não utilizado.",
+  "Updating_output_timestamps_of_project_0_6359": "Updating output timestamps of project '{0}'...",
   "Use_synthetic_default_member_95016": "Use o membro sintético 'padrão'.",
   "Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher_2494": "Há suporte para o uso de uma cadeia de caracteres em uma instrução 'for...of' somente no ECMAScript 5 e superior.",
   "VERSION_6036": "VERSÃO",
@@ -1017,6 +1038,7 @@
   "const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN_2478": "O inicializador de membro de enumeração 'const' foi avaliado como o valor não permitido 'NaN'.",
   "const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_im_2475": "Enumerações 'const' só podem ser usadas em expressões de acesso de índice ou propriedade, ou então do lado direito de uma consulta de tipo, declaração de importação ou atribuição de exportação.",
   "delete_cannot_be_called_on_an_identifier_in_strict_mode_1102": "'delete' não pode ser chamado em um identificador no modo estrito.",
+  "delete_this_Project_0_is_up_to_date_because_it_was_previously_built_6360": "delete this - Project '{0}' is up to date because it was previously built",
   "enum_declarations_can_only_be_used_in_a_ts_file_8015": "'enum declarations' só podem ser usadas em um arquivo .ts.",
   "export_can_only_be_used_in_a_ts_file_8003": "'export=' só pode ser usado em um arquivo .ts.",
   "export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always__2668": "O modificador 'export' não pode ser aplicado a módulos de ambiente e acréscimos de módulo, pois eles estão sempre visíveis.",
diff --git a/lib/tsc.js b/lib/tsc.js
index f33041c9f4ad9..81404fac6facc 100644
--- a/lib/tsc.js
+++ b/lib/tsc.js
@@ -1,139 +1,28 @@
-/*! *****************************************************************************
-Copyright (c) Microsoft Corporation. All rights reserved. 
-Licensed under the Apache License, Version 2.0 (the "License"); you may not use
-this file except in compliance with the License. You may obtain a copy of the
-License at http://www.apache.org/licenses/LICENSE-2.0  
- 
-THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
-WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
-MERCHANTABLITY OR NON-INFRINGEMENT. 
- 
-See the Apache Version 2.0 License for specific language governing permissions
-and limitations under the License.
-***************************************************************************** */
-
 "use strict";"use strict";
-/*@internal*/
-var ts;
-(function (ts) {
-    /** Gets a timestamp with (at least) ms resolution */
-    ts.timestamp = typeof performance !== "undefined" && performance.now ? function () { return performance.now(); } : Date.now ? Date.now : function () { return +(new Date()); };
-})(ts || (ts = {}));
-/*@internal*/
-/** Performance measurements for the compiler. */
-(function (ts) {
-    var performance;
-    (function (performance) {
-        // NOTE: cannot use ts.noop as core.ts loads after this
-        var profilerEvent = typeof onProfilerEvent === "function" && onProfilerEvent.profiler === true ? onProfilerEvent : function () { };
-        var enabled = false;
-        var profilerStart = 0;
-        var counts;
-        var marks;
-        var measures;
-        /**
-         * Marks a performance event.
-         *
-         * @param markName The name of the mark.
-         */
-        function mark(markName) {
-            if (enabled) {
-                marks.set(markName, ts.timestamp());
-                counts.set(markName, (counts.get(markName) || 0) + 1);
-                profilerEvent(markName);
-            }
-        }
-        performance.mark = mark;
-        /**
-         * Adds a performance measurement with the specified name.
-         *
-         * @param measureName The name of the performance measurement.
-         * @param startMarkName The name of the starting mark. If not supplied, the point at which the
-         *      profiler was enabled is used.
-         * @param endMarkName The name of the ending mark. If not supplied, the current timestamp is
-         *      used.
-         */
-        function measure(measureName, startMarkName, endMarkName) {
-            if (enabled) {
-                var end = endMarkName && marks.get(endMarkName) || ts.timestamp();
-                var start = startMarkName && marks.get(startMarkName) || profilerStart;
-                measures.set(measureName, (measures.get(measureName) || 0) + (end - start));
-            }
-        }
-        performance.measure = measure;
-        /**
-         * Gets the number of times a marker was encountered.
-         *
-         * @param markName The name of the mark.
-         */
-        function getCount(markName) {
-            return counts && counts.get(markName) || 0;
-        }
-        performance.getCount = getCount;
-        /**
-         * Gets the total duration of all measurements with the supplied name.
-         *
-         * @param measureName The name of the measure whose durations should be accumulated.
-         */
-        function getDuration(measureName) {
-            return measures && measures.get(measureName) || 0;
-        }
-        performance.getDuration = getDuration;
-        /**
-         * Iterate over each measure, performing some action
-         *
-         * @param cb The action to perform for each measure
-         */
-        function forEachMeasure(cb) {
-            measures.forEach(function (measure, key) {
-                cb(key, measure);
-            });
-        }
-        performance.forEachMeasure = forEachMeasure;
-        /** Enables (and resets) performance measurements for the compiler. */
-        function enable() {
-            counts = ts.createMap();
-            marks = ts.createMap();
-            measures = ts.createMap();
-            enabled = true;
-            profilerStart = ts.timestamp();
-        }
-        performance.enable = enable;
-        /** Disables performance measurements for the compiler. */
-        function disable() {
-            enabled = false;
-        }
-        performance.disable = disable;
-    })(performance = ts.performance || (ts.performance = {}));
-})(ts || (ts = {}));
+var __assign = (this && this.__assign) || Object.assign || function(t) {
+    for (var s, i = 1, n = arguments.length; i < n; i++) {
+        s = arguments[i];
+        for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
+            t[p] = s[p];
+    }
+    return t;
+};
+var __makeTemplateObject = (this && this.__makeTemplateObject) || function (cooked, raw) {
+    if (Object.defineProperty) { Object.defineProperty(cooked, "raw", { value: raw }); } else { cooked.raw = raw; }
+    return cooked;
+};
 var ts;
 (function (ts) {
-    // WARNING: The script `configureNightly.ts` uses a regexp to parse out these values.
-    // If changing the text in this section, be sure to test `configureNightly` too.
     ts.versionMajorMinor = "3.0";
-    /** The version of the TypeScript compiler release */
     ts.version = ts.versionMajorMinor + ".0-dev";
 })(ts || (ts = {}));
-/* @internal */
 (function (ts) {
-    var Comparison;
-    (function (Comparison) {
-        Comparison[Comparison["LessThan"] = -1] = "LessThan";
-        Comparison[Comparison["EqualTo"] = 0] = "EqualTo";
-        Comparison[Comparison["GreaterThan"] = 1] = "GreaterThan";
-    })(Comparison = ts.Comparison || (ts.Comparison = {}));
-    /** Create a MapLike with good performance. */
     function createDictionaryObject() {
-        var map = Object.create(/*prototype*/ null); // tslint:disable-line:no-null-keyword
-        // Using 'delete' on an object causes V8 to put the object in dictionary mode.
-        // This disables creation of hidden classes, which are expensive when an object is
-        // constantly changing shape.
+        var map = Object.create(null);
         map.__ = undefined;
         delete map.__;
         return map;
     }
-    /** Create a new map. If a template object is provided, the map will copy entries from it. */
     function createMap() {
         return new ts.MapCtr();
     }
@@ -149,8 +38,6 @@ var ts;
     ts.createMapFromEntries = createMapFromEntries;
     function createMapFromTemplate(template) {
         var map = new ts.MapCtr();
-        // Copies keys/values from template. Note that for..in will not throw if
-        // template is undefined, and instead will just exit the loop.
         for (var key in template) {
             if (hasOwnProperty.call(template, key)) {
                 map.set(key, template[key]);
@@ -159,12 +46,9 @@ var ts;
         return map;
     }
     ts.createMapFromTemplate = createMapFromTemplate;
-    // Internet Explorer's Map doesn't support iteration, so don't use it.
-    // tslint:disable-next-line no-in-operator variable-name
     ts.MapCtr = typeof Map !== "undefined" && "entries" in Map.prototype ? Map : shimMap();
-    // Keep the class inside a function so it doesn't get compiled if it's not used.
     function shimMap() {
-        var MapIterator = /** @class */ (function () {
+        var MapIterator = (function () {
             function MapIterator(data, selector) {
                 this.index = 0;
                 this.data = data;
@@ -181,7 +65,7 @@ var ts;
             };
             return MapIterator;
         }());
-        return /** @class */ (function () {
+        return (function () {
             function class_1() {
                 this.data = createDictionaryObject();
                 this.size = 0;
@@ -197,7 +81,6 @@ var ts;
                 return this;
             };
             class_1.prototype.has = function (key) {
-                // tslint:disable-next-line:no-in-operator
                 return key in this.data;
             };
             class_1.prototype.delete = function (key) {
@@ -233,11 +116,6 @@ var ts;
         return array ? array.length : 0;
     }
     ts.length = length;
-    /**
-     * Iterates through 'array' by index and performs the callback on each element of array until the callback
-     * returns a truthy value, then returns that value.
-     * If no such value is found, the callback is applied to each element of array and undefined is returned.
-     */
     function forEach(array, callback) {
         if (array) {
             for (var i = 0; i < array.length; i++) {
@@ -250,7 +128,6 @@ var ts;
         return undefined;
     }
     ts.forEach = forEach;
-    /** Like `forEach`, but suitable for use with numbers and strings (which may be falsy). */
     function firstDefined(array, callback) {
         if (array === undefined) {
             return undefined;
@@ -309,11 +186,6 @@ var ts;
         return map;
     }
     ts.zipToMap = zipToMap;
-    /**
-     * Iterates through `array` by index and performs the callback on each element of array until the callback
-     * returns a falsey value, then returns false.
-     * If no such value is found, the callback is applied to each element of array and `true` is returned.
-     */
     function every(array, callback) {
         if (array) {
             for (var i = 0; i < array.length; i++) {
@@ -345,7 +217,6 @@ var ts;
         return undefined;
     }
     ts.findLast = findLast;
-    /** Works like Array.prototype.findIndex, returning `-1` if no element satisfying the predicate is found. */
     function findIndex(array, predicate, startIndex) {
         for (var i = startIndex || 0; i < array.length; i++) {
             if (predicate(array[i], i)) {
@@ -364,10 +235,6 @@ var ts;
         return -1;
     }
     ts.findLastIndex = findLastIndex;
-    /**
-     * Returns the first truthy result of `callback`, or else fails.
-     * This is like `forEach`, but never returns undefined.
-     */
     function findMap(array, callback) {
         for (var i = 0; i < array.length; i++) {
             var result = callback(array[i], i);
@@ -698,7 +565,6 @@ var ts;
         return false;
     }
     ts.some = some;
-    /** Calls the callback with (start, afterEnd) index pairs for each range where 'pred' is true. */
     function getRangesWhere(arr, pred, cb) {
         var start;
         for (var i = 0; i < arr.length; i++) {
@@ -725,8 +591,6 @@ var ts;
     }
     ts.concatenate = concatenate;
     function deduplicateRelational(array, equalityComparer, comparer) {
-        // Perform a stable sort of the array. This ensures the first entry in a list of
-        // duplicates remains the first entry in the result.
         var indices = array.map(function (_, i) { return i; });
         stableSortIndices(array, indices, comparer);
         var last = array[indices[0]];
@@ -739,7 +603,6 @@ var ts;
                 last = item;
             }
         }
-        // restore original order
         deduplicated.sort();
         return deduplicated.map(function (i) { return array[i]; });
     }
@@ -769,13 +632,10 @@ var ts;
         for (var i = 1; i < array.length; i++) {
             var next = array[i];
             switch (comparer(next, last)) {
-                // equality comparison
                 case true:
-                // relational comparison
-                case 0 /* EqualTo */:
+                case 0:
                     continue;
-                case -1 /* LessThan */:
-                    // If `array` is sorted, `next` should **never** be less than `last`.
+                case -1:
                     return Debug.fail("Array is unsorted.");
             }
             deduplicated.push(last = next);
@@ -831,41 +691,25 @@ var ts;
         return result || array;
     }
     ts.compact = compact;
-    /**
-     * Gets the relative complement of `arrayA` with respect to `arrayB`, returning the elements that
-     * are not present in `arrayA` but are present in `arrayB`. Assumes both arrays are sorted
-     * based on the provided comparer.
-     */
     function relativeComplement(arrayA, arrayB, comparer) {
         if (!arrayB || !arrayA || arrayB.length === 0 || arrayA.length === 0)
             return arrayB;
         var result = [];
         loopB: for (var offsetA = 0, offsetB = 0; offsetB < arrayB.length; offsetB++) {
             if (offsetB > 0) {
-                // Ensure `arrayB` is properly sorted.
-                Debug.assertGreaterThanOrEqual(comparer(arrayB[offsetB], arrayB[offsetB - 1]), 0 /* EqualTo */);
+                Debug.assertGreaterThanOrEqual(comparer(arrayB[offsetB], arrayB[offsetB - 1]), 0);
             }
             loopA: for (var startA = offsetA; offsetA < arrayA.length; offsetA++) {
                 if (offsetA > startA) {
-                    // Ensure `arrayA` is properly sorted. We only need to perform this check if
-                    // `offsetA` has changed since we entered the loop.
-                    Debug.assertGreaterThanOrEqual(comparer(arrayA[offsetA], arrayA[offsetA - 1]), 0 /* EqualTo */);
+                    Debug.assertGreaterThanOrEqual(comparer(arrayA[offsetA], arrayA[offsetA - 1]), 0);
                 }
                 switch (comparer(arrayB[offsetB], arrayA[offsetA])) {
-                    case -1 /* LessThan */:
-                        // If B is less than A, B does not exist in arrayA. Add B to the result and
-                        // move to the next element in arrayB without changing the current position
-                        // in arrayA.
+                    case -1:
                         result.push(arrayB[offsetB]);
                         continue loopB;
-                    case 0 /* EqualTo */:
-                        // If B is equal to A, B exists in arrayA. Move to the next element in
-                        // arrayB without adding B to the result or changing the current position
-                        // in arrayA.
+                    case 0:
                         continue loopB;
-                    case 1 /* GreaterThan */:
-                        // If B is greater than A, we need to keep looking for B in arrayA. Move to
-                        // the next element in arrayA and recheck.
+                    case 1:
                         continue loopA;
                 }
             }
@@ -891,10 +735,6 @@ var ts;
         return to;
     }
     ts.append = append;
-    /**
-     * Gets the actual offset into an array for a relative offset. Negative offsets indicate a
-     * position offset from the end of the array.
-     */
     function toOffset(array, offset) {
         return offset < 0 ? array.length + offset : offset;
     }
@@ -913,9 +753,6 @@ var ts;
         return to;
     }
     ts.addRange = addRange;
-    /**
-     * @return Whether the value was added.
-     */
     function pushIfUnique(array, toAdd, equalityComparer) {
         if (contains(array, toAdd, equalityComparer)) {
             return false;
@@ -926,9 +763,6 @@ var ts;
         }
     }
     ts.pushIfUnique = pushIfUnique;
-    /**
-     * Unlike `pushIfUnique`, this can take `undefined` as an input, and returns a new array.
-     */
     function appendIfUnique(array, toAdd, equalityComparer) {
         if (array) {
             pushIfUnique(array, toAdd, equalityComparer);
@@ -940,12 +774,8 @@ var ts;
     }
     ts.appendIfUnique = appendIfUnique;
     function stableSortIndices(array, indices, comparer) {
-        // sort indices by value then position
         indices.sort(function (x, y) { return comparer(array[x], array[y]) || compareValues(x, y); });
     }
-    /**
-     * Returns a new sorted array.
-     */
     function sort(array, comparer) {
         return array.slice().sort(comparer);
     }
@@ -980,9 +810,6 @@ var ts;
             } };
     }
     ts.arrayIterator = arrayIterator;
-    /**
-     * Stable sort of an array. Elements equal to each other maintain their relative position in the array.
-     */
     function stableSort(array, comparer) {
         var indices = array.map(function (_, i) { return i; });
         stableSortIndices(array, indices, comparer);
@@ -999,10 +826,6 @@ var ts;
         return true;
     }
     ts.rangeEquals = rangeEquals;
-    /**
-     * Returns the element at a specific offset in an array if non-empty, `undefined` otherwise.
-     * A negative offset indicates the element should be retrieved from the end of the array.
-     */
     function elementAt(array, offset) {
         if (array) {
             offset = toOffset(array, offset);
@@ -1013,9 +836,6 @@ var ts;
         return undefined;
     }
     ts.elementAt = elementAt;
-    /**
-     * Returns the first element of an array if non-empty, `undefined` otherwise.
-     */
     function firstOrUndefined(array) {
         return array.length === 0 ? undefined : array[0];
     }
@@ -1025,9 +845,6 @@ var ts;
         return array[0];
     }
     ts.first = first;
-    /**
-     * Returns the last element of an array if non-empty, `undefined` otherwise.
-     */
     function lastOrUndefined(array) {
         return array.length === 0 ? undefined : array[array.length - 1];
     }
@@ -1037,9 +854,6 @@ var ts;
         return array[array.length - 1];
     }
     ts.last = last;
-    /**
-     * Returns the only element of an array if it contains only one element, `undefined` otherwise.
-     */
     function singleOrUndefined(array) {
         return array && array.length === 1
             ? array[0]
@@ -1058,17 +872,6 @@ var ts;
         return result;
     }
     ts.replaceElement = replaceElement;
-    /**
-     * Performs a binary search, finding the index at which `value` occurs in `array`.
-     * If no such index is found, returns the 2's-complement of first index at which
-     * `array[index]` exceeds `value`.
-     * @param array A sorted array whose first element must be no larger than number
-     * @param value The value to be searched for in the array.
-     * @param keySelector A callback used to select the search key from `value` and each element of
-     * `array`.
-     * @param keyComparer A callback used to compare two keys in a sorted array.
-     * @param offset An offset into `array` at which to start the search.
-     */
     function binarySearch(array, value, keySelector, keyComparer, offset) {
         if (!array || array.length === 0) {
             return -1;
@@ -1080,12 +883,12 @@ var ts;
             var middle = low + ((high - low) >> 1);
             var midKey = keySelector(array[middle]);
             switch (keyComparer(midKey, key)) {
-                case -1 /* LessThan */:
+                case -1:
                     low = middle + 1;
                     break;
-                case 0 /* EqualTo */:
+                case 0:
                     return middle;
-                case 1 /* GreaterThan */:
+                case 1:
                     high = middle - 1;
                     break;
             }
@@ -1118,29 +921,14 @@ var ts;
     }
     ts.reduceLeft = reduceLeft;
     var hasOwnProperty = Object.prototype.hasOwnProperty;
-    /**
-     * Indicates whether a map-like contains an own property with the specified key.
-     *
-     * @param map A map-like.
-     * @param key A property key.
-     */
     function hasProperty(map, key) {
         return hasOwnProperty.call(map, key);
     }
     ts.hasProperty = hasProperty;
-    /**
-     * Gets the value of an owned property in a map-like.
-     *
-     * @param map A map-like.
-     * @param key A property key.
-     */
     function getProperty(map, key) {
         return hasOwnProperty.call(map, key) ? map[key] : undefined;
     }
     ts.getProperty = getProperty;
-    /**
-     * Gets the owned, enumerable property keys of a map-like.
-     */
     function getOwnKeys(map) {
         var keys = [];
         for (var key in map) {
@@ -1179,19 +967,13 @@ var ts;
             var arg = args_1[_a];
             for (var p in arg) {
                 if (hasProperty(arg, p)) {
-                    t[p] = arg[p]; // TODO: GH#23368
+                    t[p] = arg[p];
                 }
             }
         }
         return t;
     }
     ts.assign = assign;
-    /**
-     * Performs a shallow equality comparison of the contents of two map-likes.
-     *
-     * @param left A map-like whose properties should be compared.
-     * @param right A map-like whose properties should be compared.
-     */
     function equalOwnProperties(left, right, equalityComparer) {
         if (equalityComparer === void 0) { equalityComparer = equateValues; }
         if (left === right)
@@ -1302,9 +1084,6 @@ var ts;
             }
         }
     }
-    /**
-     * Tests whether a value is an array.
-     */
     function isArray(value) {
         return Array.isArray ? Array.isArray(value) : value instanceof Array;
     }
@@ -1313,9 +1092,6 @@ var ts;
         return isArray(value) ? value : [value];
     }
     ts.toArray = toArray;
-    /**
-     * Tests whether a value is string
-     */
     function isString(text) {
         return typeof text === "string";
     }
@@ -1330,22 +1106,16 @@ var ts;
         return Debug.fail("Invalid cast. The supplied value " + value + " did not pass the test '" + Debug.getFunctionName(test) + "'.");
     }
     ts.cast = cast;
-    /** Does nothing. */
-    function noop(_) { } // tslint:disable-line no-empty
+    function noop(_) { }
     ts.noop = noop;
-    /** Do nothing and return false */
     function returnFalse() { return false; }
     ts.returnFalse = returnFalse;
-    /** Do nothing and return true */
     function returnTrue() { return true; }
     ts.returnTrue = returnTrue;
-    /** Returns its argument. */
     function identity(x) { return x; }
     ts.identity = identity;
-    /** Returns lower case string */
     function toLowerCase(x) { return x.toLowerCase(); }
     ts.toLowerCase = toLowerCase;
-    /** Throws an error because a function is not implemented. */
     function notImplemented() {
         throw new Error("Not implemented");
     }
@@ -1411,16 +1181,9 @@ var ts;
         }
     }
     ts.compose = compose;
-    var AssertionLevel;
-    (function (AssertionLevel) {
-        AssertionLevel[AssertionLevel["None"] = 0] = "None";
-        AssertionLevel[AssertionLevel["Normal"] = 1] = "Normal";
-        AssertionLevel[AssertionLevel["Aggressive"] = 2] = "Aggressive";
-        AssertionLevel[AssertionLevel["VeryAggressive"] = 3] = "VeryAggressive";
-    })(AssertionLevel = ts.AssertionLevel || (ts.AssertionLevel = {}));
     var Debug;
     (function (Debug) {
-        Debug.currentAssertionLevel = 0 /* None */;
+        Debug.currentAssertionLevel = 0;
         Debug.isDebugging = false;
         function shouldAssert(level) {
             return Debug.currentAssertionLevel >= level;
@@ -1506,14 +1269,6 @@ var ts;
         return a === b;
     }
     ts.equateValues = equateValues;
-    /**
-     * Compare the equality of two strings using a case-sensitive ordinal comparison.
-     *
-     * Case-sensitive comparisons compare both strings one code-point at a time using the integer
-     * value of each code-point after applying `toUpperCase` to each string. We always map both
-     * strings to their upper-case form as some unicode characters do not properly round-trip to
-     * lowercase (such as `ẞ` (German sharp capital s)).
-     */
     function equateStringsCaseInsensitive(a, b) {
         return a === b
             || a !== undefined
@@ -1521,69 +1276,37 @@ var ts;
                 && a.toUpperCase() === b.toUpperCase();
     }
     ts.equateStringsCaseInsensitive = equateStringsCaseInsensitive;
-    /**
-     * Compare the equality of two strings using a case-sensitive ordinal comparison.
-     *
-     * Case-sensitive comparisons compare both strings one code-point at a time using the
-     * integer value of each code-point.
-     */
     function equateStringsCaseSensitive(a, b) {
         return equateValues(a, b);
     }
     ts.equateStringsCaseSensitive = equateStringsCaseSensitive;
     function compareComparableValues(a, b) {
-        return a === b ? 0 /* EqualTo */ :
-            a === undefined ? -1 /* LessThan */ :
-                b === undefined ? 1 /* GreaterThan */ :
-                    a < b ? -1 /* LessThan */ :
-                        1 /* GreaterThan */;
-    }
-    /**
-     * Compare two numeric values for their order relative to each other.
-     * To compare strings, use any of the `compareStrings` functions.
-     */
+        return a === b ? 0 :
+            a === undefined ? -1 :
+                b === undefined ? 1 :
+                    a < b ? -1 :
+                        1;
+    }
     function compareValues(a, b) {
         return compareComparableValues(a, b);
     }
     ts.compareValues = compareValues;
     function min(a, b, compare) {
-        return compare(a, b) === -1 /* LessThan */ ? a : b;
+        return compare(a, b) === -1 ? a : b;
     }
     ts.min = min;
-    /**
-     * Compare two strings using a case-insensitive ordinal comparison.
-     *
-     * Ordinal comparisons are based on the difference between the unicode code points of both
-     * strings. Characters with multiple unicode representations are considered unequal. Ordinal
-     * comparisons provide predictable ordering, but place "a" after "B".
-     *
-     * Case-insensitive comparisons compare both strings one code-point at a time using the integer
-     * value of each code-point after applying `toUpperCase` to each string. We always map both
-     * strings to their upper-case form as some unicode characters do not properly round-trip to
-     * lowercase (such as `ẞ` (German sharp capital s)).
-     */
     function compareStringsCaseInsensitive(a, b) {
         if (a === b)
-            return 0 /* EqualTo */;
+            return 0;
         if (a === undefined)
-            return -1 /* LessThan */;
+            return -1;
         if (b === undefined)
-            return 1 /* GreaterThan */;
+            return 1;
         a = a.toUpperCase();
         b = b.toUpperCase();
-        return a < b ? -1 /* LessThan */ : a > b ? 1 /* GreaterThan */ : 0 /* EqualTo */;
+        return a < b ? -1 : a > b ? 1 : 0;
     }
     ts.compareStringsCaseInsensitive = compareStringsCaseInsensitive;
-    /**
-     * Compare two strings using a case-sensitive ordinal comparison.
-     *
-     * Ordinal comparisons are based on the difference between the unicode code points of both
-     * strings. Characters with multiple unicode representations are considered unequal. Ordinal
-     * comparisons provide predictable ordering, but place "a" after "B".
-     *
-     * Case-sensitive comparisons compare both strings one code-point at a time using the integer
-     * value of each code-point.
-     */
     function compareStringsCaseSensitive(a, b) {
         return compareComparableValues(a, b);
     }
@@ -1592,9 +1315,6 @@ var ts;
         return ignoreCase ? compareStringsCaseInsensitive : compareStringsCaseSensitive;
     }
     ts.getStringComparer = getStringComparer;
-    /**
-     * Creates a string comparer for use with string collation in the UI.
-     */
     var createUIStringComparer = (function () {
         var defaultComparer;
         var enUSComparer;
@@ -1602,22 +1322,19 @@ var ts;
         return createStringComparer;
         function compareWithCallback(a, b, comparer) {
             if (a === b)
-                return 0 /* EqualTo */;
+                return 0;
             if (a === undefined)
-                return -1 /* LessThan */;
+                return -1;
             if (b === undefined)
-                return 1 /* GreaterThan */;
+                return 1;
             var value = comparer(a, b);
-            return value < 0 ? -1 /* LessThan */ : value > 0 ? 1 /* GreaterThan */ : 0 /* EqualTo */;
+            return value < 0 ? -1 : value > 0 ? 1 : 0;
         }
         function createIntlCollatorStringComparer(locale) {
-            // Intl.Collator.prototype.compare is bound to the collator. See NOTE in
-            // http://www.ecma-international.org/ecma-402/2.0/#sec-Intl.Collator.prototype.compare
             var comparer = new Intl.Collator(locale, { usage: "sort", sensitivity: "variant" }).compare;
             return function (a, b) { return compareWithCallback(a, b, comparer); };
         }
         function createLocaleCompareStringComparer(locale) {
-            // if the locale is not the default locale (`undefined`), use the fallback comparer.
             if (locale !== undefined)
                 return createFallbackStringComparer();
             return function (a, b) { return compareWithCallback(a, b, compareStrings); };
@@ -1626,39 +1343,26 @@ var ts;
             }
         }
         function createFallbackStringComparer() {
-            // An ordinal comparison puts "A" after "b", but for the UI we want "A" before "b".
-            // We first sort case insensitively.  So "Aaa" will come before "baa".
-            // Then we sort case sensitively, so "aaa" will come before "Aaa".
-            //
-            // For case insensitive comparisons we always map both strings to their
-            // upper-case form as some unicode characters do not properly round-trip to
-            // lowercase (such as `ẞ` (German sharp capital s)).
             return function (a, b) { return compareWithCallback(a, b, compareDictionaryOrder); };
             function compareDictionaryOrder(a, b) {
                 return compareStrings(a.toUpperCase(), b.toUpperCase()) || compareStrings(a, b);
             }
             function compareStrings(a, b) {
-                return a < b ? -1 /* LessThan */ : a > b ? 1 /* GreaterThan */ : 0 /* EqualTo */;
+                return a < b ? -1 : a > b ? 1 : 0;
             }
         }
         function getStringComparerFactory() {
-            // If the host supports Intl, we use it for comparisons using the default locale.
             if (typeof Intl === "object" && typeof Intl.Collator === "function") {
                 return createIntlCollatorStringComparer;
             }
-            // If the host does not support Intl, we fall back to localeCompare.
-            // localeCompare in Node v0.10 is just an ordinal comparison, so don't use it.
             if (typeof String.prototype.localeCompare === "function" &&
                 typeof String.prototype.toLocaleUpperCase === "function" &&
                 "a".localeCompare("B") < 0) {
                 return createLocaleCompareStringComparer;
             }
-            // Otherwise, fall back to ordinal comparison:
             return createFallbackStringComparer;
         }
         function createStringComparer(locale) {
-            // Hold onto common string comparers. This avoids constantly reallocating comparers during
-            // tests.
             if (locale === undefined) {
                 return defaultComparer || (defaultComparer = stringComparerFactory(locale));
             }
@@ -1683,50 +1387,25 @@ var ts;
         }
     }
     ts.setUILocale = setUILocale;
-    /**
-     * Compare two strings in a using the case-sensitive sort behavior of the UI locale.
-     *
-     * Ordering is not predictable between different host locales, but is best for displaying
-     * ordered data for UI presentation. Characters with multiple unicode representations may
-     * be considered equal.
-     *
-     * Case-sensitive comparisons compare strings that differ in base characters, or
-     * accents/diacritic marks, or case as unequal.
-     */
     function compareStringsCaseSensitiveUI(a, b) {
         var comparer = uiComparerCaseSensitive || (uiComparerCaseSensitive = createUIStringComparer(uiLocale));
         return comparer(a, b);
     }
     ts.compareStringsCaseSensitiveUI = compareStringsCaseSensitiveUI;
     function compareProperties(a, b, key, comparer) {
-        return a === b ? 0 /* EqualTo */ :
-            a === undefined ? -1 /* LessThan */ :
-                b === undefined ? 1 /* GreaterThan */ :
+        return a === b ? 0 :
+            a === undefined ? -1 :
+                b === undefined ? 1 :
                     comparer(a[key], b[key]);
     }
     ts.compareProperties = compareProperties;
-    /** True is greater than false. */
     function compareBooleans(a, b) {
         return compareValues(a ? 1 : 0, b ? 1 : 0);
     }
     ts.compareBooleans = compareBooleans;
-    /**
-     * Given a name and a list of names that are *not* equal to the name, return a spelling suggestion if there is one that is close enough.
-     * Names less than length 3 only check for case-insensitive equality, not Levenshtein distance.
-     *
-     * If there is a candidate that's the same except for case, return that.
-     * If there is a candidate that's within one edit of the name, return that.
-     * Otherwise, return the candidate with the smallest Levenshtein distance,
-     *    except for candidates:
-     *      * With no name
-     *      * Whose length differs from the target name by more than 0.34 of the length of the name.
-     *      * Whose levenshtein distance is more than 0.4 of the length of the name
-     *        (0.4 allows 1 substitution/transposition for every 5 characters,
-     *         and 1 insertion/deletion at 3 characters)
-     */
     function getSpellingSuggestion(name, candidates, getName) {
         var maximumLengthDifference = Math.min(2, Math.floor(name.length * 0.34));
-        var bestDistance = Math.floor(name.length * 0.4) + 1; // If the best result isn't better than this, don't bother.
+        var bestDistance = Math.floor(name.length * 0.4) + 1;
         var bestCandidate;
         var justCheckExactMatches = false;
         var nameLowerCase = name.toLowerCase();
@@ -1742,10 +1421,8 @@ var ts;
                     continue;
                 }
                 if (candidateName.length < 3) {
-                    // Don't bother, user would have noticed a 2-character name having an extra character
                     continue;
                 }
-                // Only care about a result better than the best so far.
                 var distance = levenshteinWithMax(nameLowerCase, candidateNameLowerCase, bestDistance - 1);
                 if (distance === undefined) {
                     continue;
@@ -1755,7 +1432,7 @@ var ts;
                     bestCandidate = candidate;
                 }
                 else {
-                    Debug.assert(distance < bestDistance); // Else `levenshteinWithMax` should return undefined
+                    Debug.assert(distance < bestDistance);
                     bestDistance = distance;
                     bestCandidate = candidate;
                 }
@@ -1767,7 +1444,6 @@ var ts;
     function levenshteinWithMax(s1, s2, max) {
         var previous = new Array(s2.length + 1);
         var current = new Array(s2.length + 1);
-        /** Represents any value > max. We don't care about the particular value. */
         var big = max + 1;
         for (var i = 0; i <= s2.length; i++) {
             previous[i] = i;
@@ -1777,7 +1453,6 @@ var ts;
             var minJ = i > max ? i - max : 1;
             var maxJ = s2.length > max + i ? max + i : s2.length;
             current[0] = i;
-            /** Smallest value of the matrix in the ith column. */
             var colMin = i;
             for (var j = 1; j < minJ; j++) {
                 current[j] = big;
@@ -1785,7 +1460,7 @@ var ts;
             for (var j = minJ; j <= maxJ; j++) {
                 var dist = c1 === s2.charCodeAt(j - 1)
                     ? previous[j - 1]
-                    : Math.min(/*delete*/ previous[j] + 1, /*insert*/ current[j - 1] + 1, /*substitute*/ previous[j - 1] + 2);
+                    : Math.min(previous[j] + 1, current[j - 1] + 1, previous[j - 1] + 2);
                 current[j] = dist;
                 colMin = Math.min(colMin, dist);
             }
@@ -1793,7 +1468,6 @@ var ts;
                 current[j] = big;
             }
             if (colMin > max) {
-                // Give up -- everything in this column is > max and it can't get better in future columns.
                 return undefined;
             }
             var temp = previous;
@@ -1834,17 +1508,11 @@ var ts;
         return false;
     }
     ts.fileExtensionIsOneOf = fileExtensionIsOneOf;
-    /**
-     * Takes a string like "jquery-min.4.2.3" and returns "jquery"
-     */
     function removeMinAndVersionNumbers(fileName) {
-        // Match a "." or "-" followed by a version number or 'min' at the end of the name
         var trailingMinOrVersion = /[.-]((min)|(\d+(\.\d+)*))$/;
-        // The "min" or version may both be present, in either order, so try applying the above twice.
         return fileName.replace(trailingMinOrVersion, "").replace(trailingMinOrVersion, "");
     }
     ts.removeMinAndVersionNumbers = removeMinAndVersionNumbers;
-    /** Remove an item from an array, moving everything to its right one space left. */
     function orderedRemoveItem(array, item) {
         for (var i = 0; i < array.length; i++) {
             if (array[i] === item) {
@@ -1855,9 +1523,7 @@ var ts;
         return false;
     }
     ts.orderedRemoveItem = orderedRemoveItem;
-    /** Remove an item by index from an array, moving everything to its right one space left. */
     function orderedRemoveItemAt(array, index) {
-        // This seems to be faster than either `array.splice(i, 1)` or `array.copyWithin(i, i+ 1)`.
         for (var i = index; i < array.length - 1; i++) {
             array[i] = array[i + 1];
         }
@@ -1865,17 +1531,14 @@ var ts;
     }
     ts.orderedRemoveItemAt = orderedRemoveItemAt;
     function unorderedRemoveItemAt(array, index) {
-        // Fill in the "hole" left at `index`.
         array[index] = array[array.length - 1];
         array.pop();
     }
     ts.unorderedRemoveItemAt = unorderedRemoveItemAt;
-    /** Remove the *first* occurrence of `item` from the array. */
     function unorderedRemoveItem(array, item) {
         return unorderedRemoveFirstItemWhere(array, function (element) { return element === item; });
     }
     ts.unorderedRemoveItem = unorderedRemoveItem;
-    /** Remove the *first* element satisfying `predicate`. */
     function unorderedRemoveFirstItemWhere(array, predicate) {
         for (var i = 0; i < array.length; i++) {
             if (predicate(array[i])) {
@@ -1894,19 +1557,13 @@ var ts;
         return prefix + "*" + suffix;
     }
     ts.patternText = patternText;
-    /**
-     * Given that candidate matches pattern, returns the text matching the '*'.
-     * E.g.: matchedText(tryParsePattern("foo*baz"), "foobarbaz") === "bar"
-     */
     function matchedText(pattern, candidate) {
         Debug.assert(isPatternMatch(pattern, candidate));
         return candidate.substring(pattern.prefix.length, candidate.length - pattern.suffix.length);
     }
     ts.matchedText = matchedText;
-    /** Return the object corresponding to the best pattern to match `candidate`. */
     function findBestPatternMatch(values, getPattern, candidate) {
         var matchedValue;
-        // use length of prefix as betterness criteria
         var longestMatchPrefixLength = -1;
         for (var _i = 0, values_2 = values; _i < values_2.length; _i++) {
             var v = values_2[_i];
@@ -1945,7 +1602,7 @@ var ts;
         return function (arg) { return f(arg) || g(arg); };
     }
     ts.or = or;
-    function assertTypeIsNever(_) { } // tslint:disable-line no-empty
+    function assertTypeIsNever(_) { }
     ts.assertTypeIsNever = assertTypeIsNever;
     function singleElementArray(t) {
         return t === undefined ? undefined : [t];
@@ -1961,11 +1618,11 @@ var ts;
             var newItem = newItems[newIndex];
             var oldItem = oldItems[oldIndex];
             var compareResult = comparer(newItem, oldItem);
-            if (compareResult === -1 /* LessThan */) {
+            if (compareResult === -1) {
                 inserted(newItem);
                 newIndex++;
             }
-            else if (compareResult === 1 /* GreaterThan */) {
+            else if (compareResult === 1) {
                 deleted(oldItem);
                 oldIndex++;
             }
@@ -1984,675 +1641,81 @@ var ts;
     }
     ts.enumerateInsertsAndDeletes = enumerateInsertsAndDeletes;
 })(ts || (ts = {}));
-//# sourceMappingURL=core.js.map
-"use strict";
-var __assign = (this && this.__assign) || Object.assign || function(t) {
-    for (var s, i = 1, n = arguments.length; i < n; i++) {
-        s = arguments[i];
-        for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
-            t[p] = s[p];
-    }
-    return t;
-};
 var ts;
 (function (ts) {
-    // token > SyntaxKind.Identifier => token is a keyword
-    // Also, If you add a new SyntaxKind be sure to keep the `Markers` section at the bottom in sync
-    var SyntaxKind;
-    (function (SyntaxKind) {
-        SyntaxKind[SyntaxKind["Unknown"] = 0] = "Unknown";
-        SyntaxKind[SyntaxKind["EndOfFileToken"] = 1] = "EndOfFileToken";
-        SyntaxKind[SyntaxKind["SingleLineCommentTrivia"] = 2] = "SingleLineCommentTrivia";
-        SyntaxKind[SyntaxKind["MultiLineCommentTrivia"] = 3] = "MultiLineCommentTrivia";
-        SyntaxKind[SyntaxKind["NewLineTrivia"] = 4] = "NewLineTrivia";
-        SyntaxKind[SyntaxKind["WhitespaceTrivia"] = 5] = "WhitespaceTrivia";
-        // We detect and preserve #! on the first line
-        SyntaxKind[SyntaxKind["ShebangTrivia"] = 6] = "ShebangTrivia";
-        // We detect and provide better error recovery when we encounter a git merge marker.  This
-        // allows us to edit files with git-conflict markers in them in a much more pleasant manner.
-        SyntaxKind[SyntaxKind["ConflictMarkerTrivia"] = 7] = "ConflictMarkerTrivia";
-        // Literals
-        SyntaxKind[SyntaxKind["NumericLiteral"] = 8] = "NumericLiteral";
-        SyntaxKind[SyntaxKind["StringLiteral"] = 9] = "StringLiteral";
-        SyntaxKind[SyntaxKind["JsxText"] = 10] = "JsxText";
-        SyntaxKind[SyntaxKind["JsxTextAllWhiteSpaces"] = 11] = "JsxTextAllWhiteSpaces";
-        SyntaxKind[SyntaxKind["RegularExpressionLiteral"] = 12] = "RegularExpressionLiteral";
-        SyntaxKind[SyntaxKind["NoSubstitutionTemplateLiteral"] = 13] = "NoSubstitutionTemplateLiteral";
-        // Pseudo-literals
-        SyntaxKind[SyntaxKind["TemplateHead"] = 14] = "TemplateHead";
-        SyntaxKind[SyntaxKind["TemplateMiddle"] = 15] = "TemplateMiddle";
-        SyntaxKind[SyntaxKind["TemplateTail"] = 16] = "TemplateTail";
-        // Punctuation
-        SyntaxKind[SyntaxKind["OpenBraceToken"] = 17] = "OpenBraceToken";
-        SyntaxKind[SyntaxKind["CloseBraceToken"] = 18] = "CloseBraceToken";
-        SyntaxKind[SyntaxKind["OpenParenToken"] = 19] = "OpenParenToken";
-        SyntaxKind[SyntaxKind["CloseParenToken"] = 20] = "CloseParenToken";
-        SyntaxKind[SyntaxKind["OpenBracketToken"] = 21] = "OpenBracketToken";
-        SyntaxKind[SyntaxKind["CloseBracketToken"] = 22] = "CloseBracketToken";
-        SyntaxKind[SyntaxKind["DotToken"] = 23] = "DotToken";
-        SyntaxKind[SyntaxKind["DotDotDotToken"] = 24] = "DotDotDotToken";
-        SyntaxKind[SyntaxKind["SemicolonToken"] = 25] = "SemicolonToken";
-        SyntaxKind[SyntaxKind["CommaToken"] = 26] = "CommaToken";
-        SyntaxKind[SyntaxKind["LessThanToken"] = 27] = "LessThanToken";
-        SyntaxKind[SyntaxKind["LessThanSlashToken"] = 28] = "LessThanSlashToken";
-        SyntaxKind[SyntaxKind["GreaterThanToken"] = 29] = "GreaterThanToken";
-        SyntaxKind[SyntaxKind["LessThanEqualsToken"] = 30] = "LessThanEqualsToken";
-        SyntaxKind[SyntaxKind["GreaterThanEqualsToken"] = 31] = "GreaterThanEqualsToken";
-        SyntaxKind[SyntaxKind["EqualsEqualsToken"] = 32] = "EqualsEqualsToken";
-        SyntaxKind[SyntaxKind["ExclamationEqualsToken"] = 33] = "ExclamationEqualsToken";
-        SyntaxKind[SyntaxKind["EqualsEqualsEqualsToken"] = 34] = "EqualsEqualsEqualsToken";
-        SyntaxKind[SyntaxKind["ExclamationEqualsEqualsToken"] = 35] = "ExclamationEqualsEqualsToken";
-        SyntaxKind[SyntaxKind["EqualsGreaterThanToken"] = 36] = "EqualsGreaterThanToken";
-        SyntaxKind[SyntaxKind["PlusToken"] = 37] = "PlusToken";
-        SyntaxKind[SyntaxKind["MinusToken"] = 38] = "MinusToken";
-        SyntaxKind[SyntaxKind["AsteriskToken"] = 39] = "AsteriskToken";
-        SyntaxKind[SyntaxKind["AsteriskAsteriskToken"] = 40] = "AsteriskAsteriskToken";
-        SyntaxKind[SyntaxKind["SlashToken"] = 41] = "SlashToken";
-        SyntaxKind[SyntaxKind["PercentToken"] = 42] = "PercentToken";
-        SyntaxKind[SyntaxKind["PlusPlusToken"] = 43] = "PlusPlusToken";
-        SyntaxKind[SyntaxKind["MinusMinusToken"] = 44] = "MinusMinusToken";
-        SyntaxKind[SyntaxKind["LessThanLessThanToken"] = 45] = "LessThanLessThanToken";
-        SyntaxKind[SyntaxKind["GreaterThanGreaterThanToken"] = 46] = "GreaterThanGreaterThanToken";
-        SyntaxKind[SyntaxKind["GreaterThanGreaterThanGreaterThanToken"] = 47] = "GreaterThanGreaterThanGreaterThanToken";
-        SyntaxKind[SyntaxKind["AmpersandToken"] = 48] = "AmpersandToken";
-        SyntaxKind[SyntaxKind["BarToken"] = 49] = "BarToken";
-        SyntaxKind[SyntaxKind["CaretToken"] = 50] = "CaretToken";
-        SyntaxKind[SyntaxKind["ExclamationToken"] = 51] = "ExclamationToken";
-        SyntaxKind[SyntaxKind["TildeToken"] = 52] = "TildeToken";
-        SyntaxKind[SyntaxKind["AmpersandAmpersandToken"] = 53] = "AmpersandAmpersandToken";
-        SyntaxKind[SyntaxKind["BarBarToken"] = 54] = "BarBarToken";
-        SyntaxKind[SyntaxKind["QuestionToken"] = 55] = "QuestionToken";
-        SyntaxKind[SyntaxKind["ColonToken"] = 56] = "ColonToken";
-        SyntaxKind[SyntaxKind["AtToken"] = 57] = "AtToken";
-        // Assignments
-        SyntaxKind[SyntaxKind["EqualsToken"] = 58] = "EqualsToken";
-        SyntaxKind[SyntaxKind["PlusEqualsToken"] = 59] = "PlusEqualsToken";
-        SyntaxKind[SyntaxKind["MinusEqualsToken"] = 60] = "MinusEqualsToken";
-        SyntaxKind[SyntaxKind["AsteriskEqualsToken"] = 61] = "AsteriskEqualsToken";
-        SyntaxKind[SyntaxKind["AsteriskAsteriskEqualsToken"] = 62] = "AsteriskAsteriskEqualsToken";
-        SyntaxKind[SyntaxKind["SlashEqualsToken"] = 63] = "SlashEqualsToken";
-        SyntaxKind[SyntaxKind["PercentEqualsToken"] = 64] = "PercentEqualsToken";
-        SyntaxKind[SyntaxKind["LessThanLessThanEqualsToken"] = 65] = "LessThanLessThanEqualsToken";
-        SyntaxKind[SyntaxKind["GreaterThanGreaterThanEqualsToken"] = 66] = "GreaterThanGreaterThanEqualsToken";
-        SyntaxKind[SyntaxKind["GreaterThanGreaterThanGreaterThanEqualsToken"] = 67] = "GreaterThanGreaterThanGreaterThanEqualsToken";
-        SyntaxKind[SyntaxKind["AmpersandEqualsToken"] = 68] = "AmpersandEqualsToken";
-        SyntaxKind[SyntaxKind["BarEqualsToken"] = 69] = "BarEqualsToken";
-        SyntaxKind[SyntaxKind["CaretEqualsToken"] = 70] = "CaretEqualsToken";
-        // Identifiers
-        SyntaxKind[SyntaxKind["Identifier"] = 71] = "Identifier";
-        // Reserved words
-        SyntaxKind[SyntaxKind["BreakKeyword"] = 72] = "BreakKeyword";
-        SyntaxKind[SyntaxKind["CaseKeyword"] = 73] = "CaseKeyword";
-        SyntaxKind[SyntaxKind["CatchKeyword"] = 74] = "CatchKeyword";
-        SyntaxKind[SyntaxKind["ClassKeyword"] = 75] = "ClassKeyword";
-        SyntaxKind[SyntaxKind["ConstKeyword"] = 76] = "ConstKeyword";
-        SyntaxKind[SyntaxKind["ContinueKeyword"] = 77] = "ContinueKeyword";
-        SyntaxKind[SyntaxKind["DebuggerKeyword"] = 78] = "DebuggerKeyword";
-        SyntaxKind[SyntaxKind["DefaultKeyword"] = 79] = "DefaultKeyword";
-        SyntaxKind[SyntaxKind["DeleteKeyword"] = 80] = "DeleteKeyword";
-        SyntaxKind[SyntaxKind["DoKeyword"] = 81] = "DoKeyword";
-        SyntaxKind[SyntaxKind["ElseKeyword"] = 82] = "ElseKeyword";
-        SyntaxKind[SyntaxKind["EnumKeyword"] = 83] = "EnumKeyword";
-        SyntaxKind[SyntaxKind["ExportKeyword"] = 84] = "ExportKeyword";
-        SyntaxKind[SyntaxKind["ExtendsKeyword"] = 85] = "ExtendsKeyword";
-        SyntaxKind[SyntaxKind["FalseKeyword"] = 86] = "FalseKeyword";
-        SyntaxKind[SyntaxKind["FinallyKeyword"] = 87] = "FinallyKeyword";
-        SyntaxKind[SyntaxKind["ForKeyword"] = 88] = "ForKeyword";
-        SyntaxKind[SyntaxKind["FunctionKeyword"] = 89] = "FunctionKeyword";
-        SyntaxKind[SyntaxKind["IfKeyword"] = 90] = "IfKeyword";
-        SyntaxKind[SyntaxKind["ImportKeyword"] = 91] = "ImportKeyword";
-        SyntaxKind[SyntaxKind["InKeyword"] = 92] = "InKeyword";
-        SyntaxKind[SyntaxKind["InstanceOfKeyword"] = 93] = "InstanceOfKeyword";
-        SyntaxKind[SyntaxKind["NewKeyword"] = 94] = "NewKeyword";
-        SyntaxKind[SyntaxKind["NullKeyword"] = 95] = "NullKeyword";
-        SyntaxKind[SyntaxKind["ReturnKeyword"] = 96] = "ReturnKeyword";
-        SyntaxKind[SyntaxKind["SuperKeyword"] = 97] = "SuperKeyword";
-        SyntaxKind[SyntaxKind["SwitchKeyword"] = 98] = "SwitchKeyword";
-        SyntaxKind[SyntaxKind["ThisKeyword"] = 99] = "ThisKeyword";
-        SyntaxKind[SyntaxKind["ThrowKeyword"] = 100] = "ThrowKeyword";
-        SyntaxKind[SyntaxKind["TrueKeyword"] = 101] = "TrueKeyword";
-        SyntaxKind[SyntaxKind["TryKeyword"] = 102] = "TryKeyword";
-        SyntaxKind[SyntaxKind["TypeOfKeyword"] = 103] = "TypeOfKeyword";
-        SyntaxKind[SyntaxKind["VarKeyword"] = 104] = "VarKeyword";
-        SyntaxKind[SyntaxKind["VoidKeyword"] = 105] = "VoidKeyword";
-        SyntaxKind[SyntaxKind["WhileKeyword"] = 106] = "WhileKeyword";
-        SyntaxKind[SyntaxKind["WithKeyword"] = 107] = "WithKeyword";
-        // Strict mode reserved words
-        SyntaxKind[SyntaxKind["ImplementsKeyword"] = 108] = "ImplementsKeyword";
-        SyntaxKind[SyntaxKind["InterfaceKeyword"] = 109] = "InterfaceKeyword";
-        SyntaxKind[SyntaxKind["LetKeyword"] = 110] = "LetKeyword";
-        SyntaxKind[SyntaxKind["PackageKeyword"] = 111] = "PackageKeyword";
-        SyntaxKind[SyntaxKind["PrivateKeyword"] = 112] = "PrivateKeyword";
-        SyntaxKind[SyntaxKind["ProtectedKeyword"] = 113] = "ProtectedKeyword";
-        SyntaxKind[SyntaxKind["PublicKeyword"] = 114] = "PublicKeyword";
-        SyntaxKind[SyntaxKind["StaticKeyword"] = 115] = "StaticKeyword";
-        SyntaxKind[SyntaxKind["YieldKeyword"] = 116] = "YieldKeyword";
-        // Contextual keywords
-        SyntaxKind[SyntaxKind["AbstractKeyword"] = 117] = "AbstractKeyword";
-        SyntaxKind[SyntaxKind["AsKeyword"] = 118] = "AsKeyword";
-        SyntaxKind[SyntaxKind["AnyKeyword"] = 119] = "AnyKeyword";
-        SyntaxKind[SyntaxKind["AsyncKeyword"] = 120] = "AsyncKeyword";
-        SyntaxKind[SyntaxKind["AwaitKeyword"] = 121] = "AwaitKeyword";
-        SyntaxKind[SyntaxKind["BooleanKeyword"] = 122] = "BooleanKeyword";
-        SyntaxKind[SyntaxKind["ConstructorKeyword"] = 123] = "ConstructorKeyword";
-        SyntaxKind[SyntaxKind["DeclareKeyword"] = 124] = "DeclareKeyword";
-        SyntaxKind[SyntaxKind["GetKeyword"] = 125] = "GetKeyword";
-        SyntaxKind[SyntaxKind["InferKeyword"] = 126] = "InferKeyword";
-        SyntaxKind[SyntaxKind["IsKeyword"] = 127] = "IsKeyword";
-        SyntaxKind[SyntaxKind["KeyOfKeyword"] = 128] = "KeyOfKeyword";
-        SyntaxKind[SyntaxKind["ModuleKeyword"] = 129] = "ModuleKeyword";
-        SyntaxKind[SyntaxKind["NamespaceKeyword"] = 130] = "NamespaceKeyword";
-        SyntaxKind[SyntaxKind["NeverKeyword"] = 131] = "NeverKeyword";
-        SyntaxKind[SyntaxKind["ReadonlyKeyword"] = 132] = "ReadonlyKeyword";
-        SyntaxKind[SyntaxKind["RequireKeyword"] = 133] = "RequireKeyword";
-        SyntaxKind[SyntaxKind["NumberKeyword"] = 134] = "NumberKeyword";
-        SyntaxKind[SyntaxKind["ObjectKeyword"] = 135] = "ObjectKeyword";
-        SyntaxKind[SyntaxKind["SetKeyword"] = 136] = "SetKeyword";
-        SyntaxKind[SyntaxKind["StringKeyword"] = 137] = "StringKeyword";
-        SyntaxKind[SyntaxKind["SymbolKeyword"] = 138] = "SymbolKeyword";
-        SyntaxKind[SyntaxKind["TypeKeyword"] = 139] = "TypeKeyword";
-        SyntaxKind[SyntaxKind["UndefinedKeyword"] = 140] = "UndefinedKeyword";
-        SyntaxKind[SyntaxKind["UniqueKeyword"] = 141] = "UniqueKeyword";
-        SyntaxKind[SyntaxKind["UnknownKeyword"] = 142] = "UnknownKeyword";
-        SyntaxKind[SyntaxKind["FromKeyword"] = 143] = "FromKeyword";
-        SyntaxKind[SyntaxKind["GlobalKeyword"] = 144] = "GlobalKeyword";
-        SyntaxKind[SyntaxKind["OfKeyword"] = 145] = "OfKeyword";
-        // Parse tree nodes
-        // Names
-        SyntaxKind[SyntaxKind["QualifiedName"] = 146] = "QualifiedName";
-        SyntaxKind[SyntaxKind["ComputedPropertyName"] = 147] = "ComputedPropertyName";
-        // Signature elements
-        SyntaxKind[SyntaxKind["TypeParameter"] = 148] = "TypeParameter";
-        SyntaxKind[SyntaxKind["Parameter"] = 149] = "Parameter";
-        SyntaxKind[SyntaxKind["Decorator"] = 150] = "Decorator";
-        // TypeMember
-        SyntaxKind[SyntaxKind["PropertySignature"] = 151] = "PropertySignature";
-        SyntaxKind[SyntaxKind["PropertyDeclaration"] = 152] = "PropertyDeclaration";
-        SyntaxKind[SyntaxKind["MethodSignature"] = 153] = "MethodSignature";
-        SyntaxKind[SyntaxKind["MethodDeclaration"] = 154] = "MethodDeclaration";
-        SyntaxKind[SyntaxKind["Constructor"] = 155] = "Constructor";
-        SyntaxKind[SyntaxKind["GetAccessor"] = 156] = "GetAccessor";
-        SyntaxKind[SyntaxKind["SetAccessor"] = 157] = "SetAccessor";
-        SyntaxKind[SyntaxKind["CallSignature"] = 158] = "CallSignature";
-        SyntaxKind[SyntaxKind["ConstructSignature"] = 159] = "ConstructSignature";
-        SyntaxKind[SyntaxKind["IndexSignature"] = 160] = "IndexSignature";
-        // Type
-        SyntaxKind[SyntaxKind["TypePredicate"] = 161] = "TypePredicate";
-        SyntaxKind[SyntaxKind["TypeReference"] = 162] = "TypeReference";
-        SyntaxKind[SyntaxKind["FunctionType"] = 163] = "FunctionType";
-        SyntaxKind[SyntaxKind["ConstructorType"] = 164] = "ConstructorType";
-        SyntaxKind[SyntaxKind["TypeQuery"] = 165] = "TypeQuery";
-        SyntaxKind[SyntaxKind["TypeLiteral"] = 166] = "TypeLiteral";
-        SyntaxKind[SyntaxKind["ArrayType"] = 167] = "ArrayType";
-        SyntaxKind[SyntaxKind["TupleType"] = 168] = "TupleType";
-        SyntaxKind[SyntaxKind["UnionType"] = 169] = "UnionType";
-        SyntaxKind[SyntaxKind["IntersectionType"] = 170] = "IntersectionType";
-        SyntaxKind[SyntaxKind["ConditionalType"] = 171] = "ConditionalType";
-        SyntaxKind[SyntaxKind["InferType"] = 172] = "InferType";
-        SyntaxKind[SyntaxKind["ParenthesizedType"] = 173] = "ParenthesizedType";
-        SyntaxKind[SyntaxKind["ThisType"] = 174] = "ThisType";
-        SyntaxKind[SyntaxKind["TypeOperator"] = 175] = "TypeOperator";
-        SyntaxKind[SyntaxKind["IndexedAccessType"] = 176] = "IndexedAccessType";
-        SyntaxKind[SyntaxKind["MappedType"] = 177] = "MappedType";
-        SyntaxKind[SyntaxKind["LiteralType"] = 178] = "LiteralType";
-        SyntaxKind[SyntaxKind["ImportType"] = 179] = "ImportType";
-        // Binding patterns
-        SyntaxKind[SyntaxKind["ObjectBindingPattern"] = 180] = "ObjectBindingPattern";
-        SyntaxKind[SyntaxKind["ArrayBindingPattern"] = 181] = "ArrayBindingPattern";
-        SyntaxKind[SyntaxKind["BindingElement"] = 182] = "BindingElement";
-        // Expression
-        SyntaxKind[SyntaxKind["ArrayLiteralExpression"] = 183] = "ArrayLiteralExpression";
-        SyntaxKind[SyntaxKind["ObjectLiteralExpression"] = 184] = "ObjectLiteralExpression";
-        SyntaxKind[SyntaxKind["PropertyAccessExpression"] = 185] = "PropertyAccessExpression";
-        SyntaxKind[SyntaxKind["ElementAccessExpression"] = 186] = "ElementAccessExpression";
-        SyntaxKind[SyntaxKind["CallExpression"] = 187] = "CallExpression";
-        SyntaxKind[SyntaxKind["NewExpression"] = 188] = "NewExpression";
-        SyntaxKind[SyntaxKind["TaggedTemplateExpression"] = 189] = "TaggedTemplateExpression";
-        SyntaxKind[SyntaxKind["TypeAssertionExpression"] = 190] = "TypeAssertionExpression";
-        SyntaxKind[SyntaxKind["ParenthesizedExpression"] = 191] = "ParenthesizedExpression";
-        SyntaxKind[SyntaxKind["FunctionExpression"] = 192] = "FunctionExpression";
-        SyntaxKind[SyntaxKind["ArrowFunction"] = 193] = "ArrowFunction";
-        SyntaxKind[SyntaxKind["DeleteExpression"] = 194] = "DeleteExpression";
-        SyntaxKind[SyntaxKind["TypeOfExpression"] = 195] = "TypeOfExpression";
-        SyntaxKind[SyntaxKind["VoidExpression"] = 196] = "VoidExpression";
-        SyntaxKind[SyntaxKind["AwaitExpression"] = 197] = "AwaitExpression";
-        SyntaxKind[SyntaxKind["PrefixUnaryExpression"] = 198] = "PrefixUnaryExpression";
-        SyntaxKind[SyntaxKind["PostfixUnaryExpression"] = 199] = "PostfixUnaryExpression";
-        SyntaxKind[SyntaxKind["BinaryExpression"] = 200] = "BinaryExpression";
-        SyntaxKind[SyntaxKind["ConditionalExpression"] = 201] = "ConditionalExpression";
-        SyntaxKind[SyntaxKind["TemplateExpression"] = 202] = "TemplateExpression";
-        SyntaxKind[SyntaxKind["YieldExpression"] = 203] = "YieldExpression";
-        SyntaxKind[SyntaxKind["SpreadElement"] = 204] = "SpreadElement";
-        SyntaxKind[SyntaxKind["ClassExpression"] = 205] = "ClassExpression";
-        SyntaxKind[SyntaxKind["OmittedExpression"] = 206] = "OmittedExpression";
-        SyntaxKind[SyntaxKind["ExpressionWithTypeArguments"] = 207] = "ExpressionWithTypeArguments";
-        SyntaxKind[SyntaxKind["AsExpression"] = 208] = "AsExpression";
-        SyntaxKind[SyntaxKind["NonNullExpression"] = 209] = "NonNullExpression";
-        SyntaxKind[SyntaxKind["MetaProperty"] = 210] = "MetaProperty";
-        // Misc
-        SyntaxKind[SyntaxKind["TemplateSpan"] = 211] = "TemplateSpan";
-        SyntaxKind[SyntaxKind["SemicolonClassElement"] = 212] = "SemicolonClassElement";
-        // Element
-        SyntaxKind[SyntaxKind["Block"] = 213] = "Block";
-        SyntaxKind[SyntaxKind["VariableStatement"] = 214] = "VariableStatement";
-        SyntaxKind[SyntaxKind["EmptyStatement"] = 215] = "EmptyStatement";
-        SyntaxKind[SyntaxKind["ExpressionStatement"] = 216] = "ExpressionStatement";
-        SyntaxKind[SyntaxKind["IfStatement"] = 217] = "IfStatement";
-        SyntaxKind[SyntaxKind["DoStatement"] = 218] = "DoStatement";
-        SyntaxKind[SyntaxKind["WhileStatement"] = 219] = "WhileStatement";
-        SyntaxKind[SyntaxKind["ForStatement"] = 220] = "ForStatement";
-        SyntaxKind[SyntaxKind["ForInStatement"] = 221] = "ForInStatement";
-        SyntaxKind[SyntaxKind["ForOfStatement"] = 222] = "ForOfStatement";
-        SyntaxKind[SyntaxKind["ContinueStatement"] = 223] = "ContinueStatement";
-        SyntaxKind[SyntaxKind["BreakStatement"] = 224] = "BreakStatement";
-        SyntaxKind[SyntaxKind["ReturnStatement"] = 225] = "ReturnStatement";
-        SyntaxKind[SyntaxKind["WithStatement"] = 226] = "WithStatement";
-        SyntaxKind[SyntaxKind["SwitchStatement"] = 227] = "SwitchStatement";
-        SyntaxKind[SyntaxKind["LabeledStatement"] = 228] = "LabeledStatement";
-        SyntaxKind[SyntaxKind["ThrowStatement"] = 229] = "ThrowStatement";
-        SyntaxKind[SyntaxKind["TryStatement"] = 230] = "TryStatement";
-        SyntaxKind[SyntaxKind["DebuggerStatement"] = 231] = "DebuggerStatement";
-        SyntaxKind[SyntaxKind["VariableDeclaration"] = 232] = "VariableDeclaration";
-        SyntaxKind[SyntaxKind["VariableDeclarationList"] = 233] = "VariableDeclarationList";
-        SyntaxKind[SyntaxKind["FunctionDeclaration"] = 234] = "FunctionDeclaration";
-        SyntaxKind[SyntaxKind["ClassDeclaration"] = 235] = "ClassDeclaration";
-        SyntaxKind[SyntaxKind["InterfaceDeclaration"] = 236] = "InterfaceDeclaration";
-        SyntaxKind[SyntaxKind["TypeAliasDeclaration"] = 237] = "TypeAliasDeclaration";
-        SyntaxKind[SyntaxKind["EnumDeclaration"] = 238] = "EnumDeclaration";
-        SyntaxKind[SyntaxKind["ModuleDeclaration"] = 239] = "ModuleDeclaration";
-        SyntaxKind[SyntaxKind["ModuleBlock"] = 240] = "ModuleBlock";
-        SyntaxKind[SyntaxKind["CaseBlock"] = 241] = "CaseBlock";
-        SyntaxKind[SyntaxKind["NamespaceExportDeclaration"] = 242] = "NamespaceExportDeclaration";
-        SyntaxKind[SyntaxKind["ImportEqualsDeclaration"] = 243] = "ImportEqualsDeclaration";
-        SyntaxKind[SyntaxKind["ImportDeclaration"] = 244] = "ImportDeclaration";
-        SyntaxKind[SyntaxKind["ImportClause"] = 245] = "ImportClause";
-        SyntaxKind[SyntaxKind["NamespaceImport"] = 246] = "NamespaceImport";
-        SyntaxKind[SyntaxKind["NamedImports"] = 247] = "NamedImports";
-        SyntaxKind[SyntaxKind["ImportSpecifier"] = 248] = "ImportSpecifier";
-        SyntaxKind[SyntaxKind["ExportAssignment"] = 249] = "ExportAssignment";
-        SyntaxKind[SyntaxKind["ExportDeclaration"] = 250] = "ExportDeclaration";
-        SyntaxKind[SyntaxKind["NamedExports"] = 251] = "NamedExports";
-        SyntaxKind[SyntaxKind["ExportSpecifier"] = 252] = "ExportSpecifier";
-        SyntaxKind[SyntaxKind["MissingDeclaration"] = 253] = "MissingDeclaration";
-        // Module references
-        SyntaxKind[SyntaxKind["ExternalModuleReference"] = 254] = "ExternalModuleReference";
-        // JSX
-        SyntaxKind[SyntaxKind["JsxElement"] = 255] = "JsxElement";
-        SyntaxKind[SyntaxKind["JsxSelfClosingElement"] = 256] = "JsxSelfClosingElement";
-        SyntaxKind[SyntaxKind["JsxOpeningElement"] = 257] = "JsxOpeningElement";
-        SyntaxKind[SyntaxKind["JsxClosingElement"] = 258] = "JsxClosingElement";
-        SyntaxKind[SyntaxKind["JsxFragment"] = 259] = "JsxFragment";
-        SyntaxKind[SyntaxKind["JsxOpeningFragment"] = 260] = "JsxOpeningFragment";
-        SyntaxKind[SyntaxKind["JsxClosingFragment"] = 261] = "JsxClosingFragment";
-        SyntaxKind[SyntaxKind["JsxAttribute"] = 262] = "JsxAttribute";
-        SyntaxKind[SyntaxKind["JsxAttributes"] = 263] = "JsxAttributes";
-        SyntaxKind[SyntaxKind["JsxSpreadAttribute"] = 264] = "JsxSpreadAttribute";
-        SyntaxKind[SyntaxKind["JsxExpression"] = 265] = "JsxExpression";
-        // Clauses
-        SyntaxKind[SyntaxKind["CaseClause"] = 266] = "CaseClause";
-        SyntaxKind[SyntaxKind["DefaultClause"] = 267] = "DefaultClause";
-        SyntaxKind[SyntaxKind["HeritageClause"] = 268] = "HeritageClause";
-        SyntaxKind[SyntaxKind["CatchClause"] = 269] = "CatchClause";
-        // Property assignments
-        SyntaxKind[SyntaxKind["PropertyAssignment"] = 270] = "PropertyAssignment";
-        SyntaxKind[SyntaxKind["ShorthandPropertyAssignment"] = 271] = "ShorthandPropertyAssignment";
-        SyntaxKind[SyntaxKind["SpreadAssignment"] = 272] = "SpreadAssignment";
-        // Enum
-        SyntaxKind[SyntaxKind["EnumMember"] = 273] = "EnumMember";
-        // Top-level nodes
-        SyntaxKind[SyntaxKind["SourceFile"] = 274] = "SourceFile";
-        SyntaxKind[SyntaxKind["Bundle"] = 275] = "Bundle";
-        SyntaxKind[SyntaxKind["UnparsedSource"] = 276] = "UnparsedSource";
-        SyntaxKind[SyntaxKind["InputFiles"] = 277] = "InputFiles";
-        // JSDoc nodes
-        SyntaxKind[SyntaxKind["JSDocTypeExpression"] = 278] = "JSDocTypeExpression";
-        // The * type
-        SyntaxKind[SyntaxKind["JSDocAllType"] = 279] = "JSDocAllType";
-        // The ? type
-        SyntaxKind[SyntaxKind["JSDocUnknownType"] = 280] = "JSDocUnknownType";
-        SyntaxKind[SyntaxKind["JSDocNullableType"] = 281] = "JSDocNullableType";
-        SyntaxKind[SyntaxKind["JSDocNonNullableType"] = 282] = "JSDocNonNullableType";
-        SyntaxKind[SyntaxKind["JSDocOptionalType"] = 283] = "JSDocOptionalType";
-        SyntaxKind[SyntaxKind["JSDocFunctionType"] = 284] = "JSDocFunctionType";
-        SyntaxKind[SyntaxKind["JSDocVariadicType"] = 285] = "JSDocVariadicType";
-        SyntaxKind[SyntaxKind["JSDocComment"] = 286] = "JSDocComment";
-        SyntaxKind[SyntaxKind["JSDocTypeLiteral"] = 287] = "JSDocTypeLiteral";
-        SyntaxKind[SyntaxKind["JSDocSignature"] = 288] = "JSDocSignature";
-        SyntaxKind[SyntaxKind["JSDocTag"] = 289] = "JSDocTag";
-        SyntaxKind[SyntaxKind["JSDocAugmentsTag"] = 290] = "JSDocAugmentsTag";
-        SyntaxKind[SyntaxKind["JSDocClassTag"] = 291] = "JSDocClassTag";
-        SyntaxKind[SyntaxKind["JSDocCallbackTag"] = 292] = "JSDocCallbackTag";
-        SyntaxKind[SyntaxKind["JSDocParameterTag"] = 293] = "JSDocParameterTag";
-        SyntaxKind[SyntaxKind["JSDocReturnTag"] = 294] = "JSDocReturnTag";
-        SyntaxKind[SyntaxKind["JSDocTypeTag"] = 295] = "JSDocTypeTag";
-        SyntaxKind[SyntaxKind["JSDocTemplateTag"] = 296] = "JSDocTemplateTag";
-        SyntaxKind[SyntaxKind["JSDocTypedefTag"] = 297] = "JSDocTypedefTag";
-        SyntaxKind[SyntaxKind["JSDocPropertyTag"] = 298] = "JSDocPropertyTag";
-        // Synthesized list
-        SyntaxKind[SyntaxKind["SyntaxList"] = 299] = "SyntaxList";
-        // Transformation nodes
-        SyntaxKind[SyntaxKind["NotEmittedStatement"] = 300] = "NotEmittedStatement";
-        SyntaxKind[SyntaxKind["PartiallyEmittedExpression"] = 301] = "PartiallyEmittedExpression";
-        SyntaxKind[SyntaxKind["CommaListExpression"] = 302] = "CommaListExpression";
-        SyntaxKind[SyntaxKind["MergeDeclarationMarker"] = 303] = "MergeDeclarationMarker";
-        SyntaxKind[SyntaxKind["EndOfDeclarationMarker"] = 304] = "EndOfDeclarationMarker";
-        // Enum value count
-        SyntaxKind[SyntaxKind["Count"] = 305] = "Count";
-        // Markers
-        SyntaxKind[SyntaxKind["FirstAssignment"] = 58] = "FirstAssignment";
-        SyntaxKind[SyntaxKind["LastAssignment"] = 70] = "LastAssignment";
-        SyntaxKind[SyntaxKind["FirstCompoundAssignment"] = 59] = "FirstCompoundAssignment";
-        SyntaxKind[SyntaxKind["LastCompoundAssignment"] = 70] = "LastCompoundAssignment";
-        SyntaxKind[SyntaxKind["FirstReservedWord"] = 72] = "FirstReservedWord";
-        SyntaxKind[SyntaxKind["LastReservedWord"] = 107] = "LastReservedWord";
-        SyntaxKind[SyntaxKind["FirstKeyword"] = 72] = "FirstKeyword";
-        SyntaxKind[SyntaxKind["LastKeyword"] = 145] = "LastKeyword";
-        SyntaxKind[SyntaxKind["FirstFutureReservedWord"] = 108] = "FirstFutureReservedWord";
-        SyntaxKind[SyntaxKind["LastFutureReservedWord"] = 116] = "LastFutureReservedWord";
-        SyntaxKind[SyntaxKind["FirstTypeNode"] = 161] = "FirstTypeNode";
-        SyntaxKind[SyntaxKind["LastTypeNode"] = 179] = "LastTypeNode";
-        SyntaxKind[SyntaxKind["FirstPunctuation"] = 17] = "FirstPunctuation";
-        SyntaxKind[SyntaxKind["LastPunctuation"] = 70] = "LastPunctuation";
-        SyntaxKind[SyntaxKind["FirstToken"] = 0] = "FirstToken";
-        SyntaxKind[SyntaxKind["LastToken"] = 145] = "LastToken";
-        SyntaxKind[SyntaxKind["FirstTriviaToken"] = 2] = "FirstTriviaToken";
-        SyntaxKind[SyntaxKind["LastTriviaToken"] = 7] = "LastTriviaToken";
-        SyntaxKind[SyntaxKind["FirstLiteralToken"] = 8] = "FirstLiteralToken";
-        SyntaxKind[SyntaxKind["LastLiteralToken"] = 13] = "LastLiteralToken";
-        SyntaxKind[SyntaxKind["FirstTemplateToken"] = 13] = "FirstTemplateToken";
-        SyntaxKind[SyntaxKind["LastTemplateToken"] = 16] = "LastTemplateToken";
-        SyntaxKind[SyntaxKind["FirstBinaryOperator"] = 27] = "FirstBinaryOperator";
-        SyntaxKind[SyntaxKind["LastBinaryOperator"] = 70] = "LastBinaryOperator";
-        SyntaxKind[SyntaxKind["FirstNode"] = 146] = "FirstNode";
-        SyntaxKind[SyntaxKind["FirstJSDocNode"] = 278] = "FirstJSDocNode";
-        SyntaxKind[SyntaxKind["LastJSDocNode"] = 298] = "LastJSDocNode";
-        SyntaxKind[SyntaxKind["FirstJSDocTagNode"] = 289] = "FirstJSDocTagNode";
-        SyntaxKind[SyntaxKind["LastJSDocTagNode"] = 298] = "LastJSDocTagNode";
-        /* @internal */ SyntaxKind[SyntaxKind["FirstContextualKeyword"] = 117] = "FirstContextualKeyword";
-        /* @internal */ SyntaxKind[SyntaxKind["LastContextualKeyword"] = 145] = "LastContextualKeyword";
-    })(SyntaxKind = ts.SyntaxKind || (ts.SyntaxKind = {}));
-    var NodeFlags;
-    (function (NodeFlags) {
-        NodeFlags[NodeFlags["None"] = 0] = "None";
-        NodeFlags[NodeFlags["Let"] = 1] = "Let";
-        NodeFlags[NodeFlags["Const"] = 2] = "Const";
-        NodeFlags[NodeFlags["NestedNamespace"] = 4] = "NestedNamespace";
-        NodeFlags[NodeFlags["Synthesized"] = 8] = "Synthesized";
-        NodeFlags[NodeFlags["Namespace"] = 16] = "Namespace";
-        NodeFlags[NodeFlags["ExportContext"] = 32] = "ExportContext";
-        NodeFlags[NodeFlags["ContainsThis"] = 64] = "ContainsThis";
-        NodeFlags[NodeFlags["HasImplicitReturn"] = 128] = "HasImplicitReturn";
-        NodeFlags[NodeFlags["HasExplicitReturn"] = 256] = "HasExplicitReturn";
-        NodeFlags[NodeFlags["GlobalAugmentation"] = 512] = "GlobalAugmentation";
-        NodeFlags[NodeFlags["HasAsyncFunctions"] = 1024] = "HasAsyncFunctions";
-        NodeFlags[NodeFlags["DisallowInContext"] = 2048] = "DisallowInContext";
-        NodeFlags[NodeFlags["YieldContext"] = 4096] = "YieldContext";
-        NodeFlags[NodeFlags["DecoratorContext"] = 8192] = "DecoratorContext";
-        NodeFlags[NodeFlags["AwaitContext"] = 16384] = "AwaitContext";
-        NodeFlags[NodeFlags["ThisNodeHasError"] = 32768] = "ThisNodeHasError";
-        NodeFlags[NodeFlags["JavaScriptFile"] = 65536] = "JavaScriptFile";
-        NodeFlags[NodeFlags["ThisNodeOrAnySubNodesHasError"] = 131072] = "ThisNodeOrAnySubNodesHasError";
-        NodeFlags[NodeFlags["HasAggregatedChildData"] = 262144] = "HasAggregatedChildData";
-        // These flags will be set when the parser encounters a dynamic import expression or 'import.meta' to avoid
-        // walking the tree if the flags are not set. However, these flags are just a approximation
-        // (hence why it's named "PossiblyContainsDynamicImport") because once set, the flags never get cleared.
-        // During editing, if a dynamic import is removed, incremental parsing will *NOT* clear this flag.
-        // This means that the tree will always be traversed during module resolution, or when looking for external module indicators.
-        // However, the removal operation should not occur often and in the case of the
-        // removal, it is likely that users will add the import anyway.
-        // The advantage of this approach is its simplicity. For the case of batch compilation,
-        // we guarantee that users won't have to pay the price of walking the tree if a dynamic import isn't used.
-        /* @internal */ NodeFlags[NodeFlags["PossiblyContainsDynamicImport"] = 524288] = "PossiblyContainsDynamicImport";
-        /* @internal */ NodeFlags[NodeFlags["PossiblyContainsImportMeta"] = 1048576] = "PossiblyContainsImportMeta";
-        NodeFlags[NodeFlags["JSDoc"] = 2097152] = "JSDoc";
-        /* @internal */ NodeFlags[NodeFlags["Ambient"] = 4194304] = "Ambient";
-        /* @internal */ NodeFlags[NodeFlags["InWithStatement"] = 8388608] = "InWithStatement";
-        NodeFlags[NodeFlags["JsonFile"] = 16777216] = "JsonFile";
-        NodeFlags[NodeFlags["BlockScoped"] = 3] = "BlockScoped";
-        NodeFlags[NodeFlags["ReachabilityCheckFlags"] = 384] = "ReachabilityCheckFlags";
-        NodeFlags[NodeFlags["ReachabilityAndEmitFlags"] = 1408] = "ReachabilityAndEmitFlags";
-        // Parsing context flags
-        NodeFlags[NodeFlags["ContextFlags"] = 12679168] = "ContextFlags";
-        // Exclude these flags when parsing a Type
-        NodeFlags[NodeFlags["TypeExcludesFlags"] = 20480] = "TypeExcludesFlags";
-        // Represents all flags that are potentially set once and
-        // never cleared on SourceFiles which get re-used in between incremental parses.
-        // See the comment above on `PossiblyContainsDynamicImport` and `PossiblyContainsImportMeta`.
-        /* @internal */ NodeFlags[NodeFlags["PermanentlySetIncrementalFlags"] = 1572864] = "PermanentlySetIncrementalFlags";
-    })(NodeFlags = ts.NodeFlags || (ts.NodeFlags = {}));
-    var ModifierFlags;
-    (function (ModifierFlags) {
-        ModifierFlags[ModifierFlags["None"] = 0] = "None";
-        ModifierFlags[ModifierFlags["Export"] = 1] = "Export";
-        ModifierFlags[ModifierFlags["Ambient"] = 2] = "Ambient";
-        ModifierFlags[ModifierFlags["Public"] = 4] = "Public";
-        ModifierFlags[ModifierFlags["Private"] = 8] = "Private";
-        ModifierFlags[ModifierFlags["Protected"] = 16] = "Protected";
-        ModifierFlags[ModifierFlags["Static"] = 32] = "Static";
-        ModifierFlags[ModifierFlags["Readonly"] = 64] = "Readonly";
-        ModifierFlags[ModifierFlags["Abstract"] = 128] = "Abstract";
-        ModifierFlags[ModifierFlags["Async"] = 256] = "Async";
-        ModifierFlags[ModifierFlags["Default"] = 512] = "Default";
-        ModifierFlags[ModifierFlags["Const"] = 2048] = "Const";
-        ModifierFlags[ModifierFlags["HasComputedFlags"] = 536870912] = "HasComputedFlags";
-        ModifierFlags[ModifierFlags["AccessibilityModifier"] = 28] = "AccessibilityModifier";
-        // Accessibility modifiers and 'readonly' can be attached to a parameter in a constructor to make it a property.
-        ModifierFlags[ModifierFlags["ParameterPropertyModifier"] = 92] = "ParameterPropertyModifier";
-        ModifierFlags[ModifierFlags["NonPublicAccessibilityModifier"] = 24] = "NonPublicAccessibilityModifier";
-        ModifierFlags[ModifierFlags["TypeScriptModifier"] = 2270] = "TypeScriptModifier";
-        ModifierFlags[ModifierFlags["ExportDefault"] = 513] = "ExportDefault";
-        ModifierFlags[ModifierFlags["All"] = 3071] = "All";
-    })(ModifierFlags = ts.ModifierFlags || (ts.ModifierFlags = {}));
-    var JsxFlags;
-    (function (JsxFlags) {
-        JsxFlags[JsxFlags["None"] = 0] = "None";
-        /** An element from a named property of the JSX.IntrinsicElements interface */
-        JsxFlags[JsxFlags["IntrinsicNamedElement"] = 1] = "IntrinsicNamedElement";
-        /** An element inferred from the string index signature of the JSX.IntrinsicElements interface */
-        JsxFlags[JsxFlags["IntrinsicIndexedElement"] = 2] = "IntrinsicIndexedElement";
-        JsxFlags[JsxFlags["IntrinsicElement"] = 3] = "IntrinsicElement";
-    })(JsxFlags = ts.JsxFlags || (ts.JsxFlags = {}));
-    /* @internal */
-    var RelationComparisonResult;
-    (function (RelationComparisonResult) {
-        RelationComparisonResult[RelationComparisonResult["Succeeded"] = 1] = "Succeeded";
-        RelationComparisonResult[RelationComparisonResult["Failed"] = 2] = "Failed";
-        RelationComparisonResult[RelationComparisonResult["FailedAndReported"] = 3] = "FailedAndReported";
-    })(RelationComparisonResult = ts.RelationComparisonResult || (ts.RelationComparisonResult = {}));
-    /*@internal*/
-    var GeneratedIdentifierFlags;
-    (function (GeneratedIdentifierFlags) {
-        // Kinds
-        GeneratedIdentifierFlags[GeneratedIdentifierFlags["None"] = 0] = "None";
-        GeneratedIdentifierFlags[GeneratedIdentifierFlags["Auto"] = 1] = "Auto";
-        GeneratedIdentifierFlags[GeneratedIdentifierFlags["Loop"] = 2] = "Loop";
-        GeneratedIdentifierFlags[GeneratedIdentifierFlags["Unique"] = 3] = "Unique";
-        GeneratedIdentifierFlags[GeneratedIdentifierFlags["Node"] = 4] = "Node";
-        GeneratedIdentifierFlags[GeneratedIdentifierFlags["KindMask"] = 7] = "KindMask";
-        // Flags
-        GeneratedIdentifierFlags[GeneratedIdentifierFlags["ReservedInNestedScopes"] = 8] = "ReservedInNestedScopes";
-        GeneratedIdentifierFlags[GeneratedIdentifierFlags["Optimistic"] = 16] = "Optimistic";
-        GeneratedIdentifierFlags[GeneratedIdentifierFlags["FileLevel"] = 32] = "FileLevel";
-    })(GeneratedIdentifierFlags = ts.GeneratedIdentifierFlags || (ts.GeneratedIdentifierFlags = {}));
-    /* @internal */
-    var TokenFlags;
-    (function (TokenFlags) {
-        TokenFlags[TokenFlags["None"] = 0] = "None";
-        TokenFlags[TokenFlags["PrecedingLineBreak"] = 1] = "PrecedingLineBreak";
-        TokenFlags[TokenFlags["PrecedingJSDocComment"] = 2] = "PrecedingJSDocComment";
-        TokenFlags[TokenFlags["Unterminated"] = 4] = "Unterminated";
-        TokenFlags[TokenFlags["ExtendedUnicodeEscape"] = 8] = "ExtendedUnicodeEscape";
-        TokenFlags[TokenFlags["Scientific"] = 16] = "Scientific";
-        TokenFlags[TokenFlags["Octal"] = 32] = "Octal";
-        TokenFlags[TokenFlags["HexSpecifier"] = 64] = "HexSpecifier";
-        TokenFlags[TokenFlags["BinarySpecifier"] = 128] = "BinarySpecifier";
-        TokenFlags[TokenFlags["OctalSpecifier"] = 256] = "OctalSpecifier";
-        TokenFlags[TokenFlags["ContainsSeparator"] = 512] = "ContainsSeparator";
-        TokenFlags[TokenFlags["BinaryOrOctalSpecifier"] = 384] = "BinaryOrOctalSpecifier";
-        TokenFlags[TokenFlags["NumericLiteralFlags"] = 1008] = "NumericLiteralFlags";
-    })(TokenFlags = ts.TokenFlags || (ts.TokenFlags = {}));
-    var FlowFlags;
-    (function (FlowFlags) {
-        FlowFlags[FlowFlags["Unreachable"] = 1] = "Unreachable";
-        FlowFlags[FlowFlags["Start"] = 2] = "Start";
-        FlowFlags[FlowFlags["BranchLabel"] = 4] = "BranchLabel";
-        FlowFlags[FlowFlags["LoopLabel"] = 8] = "LoopLabel";
-        FlowFlags[FlowFlags["Assignment"] = 16] = "Assignment";
-        FlowFlags[FlowFlags["TrueCondition"] = 32] = "TrueCondition";
-        FlowFlags[FlowFlags["FalseCondition"] = 64] = "FalseCondition";
-        FlowFlags[FlowFlags["SwitchClause"] = 128] = "SwitchClause";
-        FlowFlags[FlowFlags["ArrayMutation"] = 256] = "ArrayMutation";
-        FlowFlags[FlowFlags["Referenced"] = 512] = "Referenced";
-        FlowFlags[FlowFlags["Shared"] = 1024] = "Shared";
-        FlowFlags[FlowFlags["PreFinally"] = 2048] = "PreFinally";
-        FlowFlags[FlowFlags["AfterFinally"] = 4096] = "AfterFinally";
-        FlowFlags[FlowFlags["Label"] = 12] = "Label";
-        FlowFlags[FlowFlags["Condition"] = 96] = "Condition";
-    })(FlowFlags = ts.FlowFlags || (ts.FlowFlags = {}));
-    var OperationCanceledException = /** @class */ (function () {
+    ts.timestamp = typeof performance !== "undefined" && performance.now ? function () { return performance.now(); } : Date.now ? Date.now : function () { return +(new Date()); };
+})(ts || (ts = {}));
+(function (ts) {
+    var performance;
+    (function (performance) {
+        var profilerEvent = typeof onProfilerEvent === "function" && onProfilerEvent.profiler === true ? onProfilerEvent : function () { };
+        var enabled = false;
+        var profilerStart = 0;
+        var counts;
+        var marks;
+        var measures;
+        function mark(markName) {
+            if (enabled) {
+                marks.set(markName, ts.timestamp());
+                counts.set(markName, (counts.get(markName) || 0) + 1);
+                profilerEvent(markName);
+            }
+        }
+        performance.mark = mark;
+        function measure(measureName, startMarkName, endMarkName) {
+            if (enabled) {
+                var end = endMarkName && marks.get(endMarkName) || ts.timestamp();
+                var start = startMarkName && marks.get(startMarkName) || profilerStart;
+                measures.set(measureName, (measures.get(measureName) || 0) + (end - start));
+            }
+        }
+        performance.measure = measure;
+        function getCount(markName) {
+            return counts && counts.get(markName) || 0;
+        }
+        performance.getCount = getCount;
+        function getDuration(measureName) {
+            return measures && measures.get(measureName) || 0;
+        }
+        performance.getDuration = getDuration;
+        function forEachMeasure(cb) {
+            measures.forEach(function (measure, key) {
+                cb(key, measure);
+            });
+        }
+        performance.forEachMeasure = forEachMeasure;
+        function enable() {
+            counts = ts.createMap();
+            marks = ts.createMap();
+            measures = ts.createMap();
+            enabled = true;
+            profilerStart = ts.timestamp();
+        }
+        performance.enable = enable;
+        function disable() {
+            enabled = false;
+        }
+        performance.disable = disable;
+    })(performance = ts.performance || (ts.performance = {}));
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var OperationCanceledException = (function () {
         function OperationCanceledException() {
         }
         return OperationCanceledException;
     }());
     ts.OperationCanceledException = OperationCanceledException;
-    /* @internal */
-    var StructureIsReused;
-    (function (StructureIsReused) {
-        StructureIsReused[StructureIsReused["Not"] = 0] = "Not";
-        StructureIsReused[StructureIsReused["SafeModules"] = 1] = "SafeModules";
-        StructureIsReused[StructureIsReused["Completely"] = 2] = "Completely";
-    })(StructureIsReused = ts.StructureIsReused || (ts.StructureIsReused = {}));
-    /** Return code used by getEmitOutput function to indicate status of the function */
     var ExitStatus;
     (function (ExitStatus) {
-        // Compiler ran successfully.  Either this was a simple do-nothing compilation (for example,
-        // when -version or -help was provided, or this was a normal compilation, no diagnostics
-        // were produced, and all outputs were generated successfully.
         ExitStatus[ExitStatus["Success"] = 0] = "Success";
-        // Diagnostics were produced and because of them no code was generated.
         ExitStatus[ExitStatus["DiagnosticsPresent_OutputsSkipped"] = 1] = "DiagnosticsPresent_OutputsSkipped";
-        // Diagnostics were produced and outputs were generated in spite of them.
         ExitStatus[ExitStatus["DiagnosticsPresent_OutputsGenerated"] = 2] = "DiagnosticsPresent_OutputsGenerated";
     })(ExitStatus = ts.ExitStatus || (ts.ExitStatus = {}));
-    /* @internal */
-    var UnionReduction;
-    (function (UnionReduction) {
-        UnionReduction[UnionReduction["None"] = 0] = "None";
-        UnionReduction[UnionReduction["Literal"] = 1] = "Literal";
-        UnionReduction[UnionReduction["Subtype"] = 2] = "Subtype";
-    })(UnionReduction = ts.UnionReduction || (ts.UnionReduction = {}));
-    var NodeBuilderFlags;
-    (function (NodeBuilderFlags) {
-        NodeBuilderFlags[NodeBuilderFlags["None"] = 0] = "None";
-        // Options
-        NodeBuilderFlags[NodeBuilderFlags["NoTruncation"] = 1] = "NoTruncation";
-        NodeBuilderFlags[NodeBuilderFlags["WriteArrayAsGenericType"] = 2] = "WriteArrayAsGenericType";
-        NodeBuilderFlags[NodeBuilderFlags["GenerateNamesForShadowedTypeParams"] = 4] = "GenerateNamesForShadowedTypeParams";
-        NodeBuilderFlags[NodeBuilderFlags["UseStructuralFallback"] = 8] = "UseStructuralFallback";
-        NodeBuilderFlags[NodeBuilderFlags["ForbidIndexedAccessSymbolReferences"] = 16] = "ForbidIndexedAccessSymbolReferences";
-        NodeBuilderFlags[NodeBuilderFlags["WriteTypeArgumentsOfSignature"] = 32] = "WriteTypeArgumentsOfSignature";
-        NodeBuilderFlags[NodeBuilderFlags["UseFullyQualifiedType"] = 64] = "UseFullyQualifiedType";
-        NodeBuilderFlags[NodeBuilderFlags["UseOnlyExternalAliasing"] = 128] = "UseOnlyExternalAliasing";
-        NodeBuilderFlags[NodeBuilderFlags["SuppressAnyReturnType"] = 256] = "SuppressAnyReturnType";
-        NodeBuilderFlags[NodeBuilderFlags["WriteTypeParametersInQualifiedName"] = 512] = "WriteTypeParametersInQualifiedName";
-        NodeBuilderFlags[NodeBuilderFlags["MultilineObjectLiterals"] = 1024] = "MultilineObjectLiterals";
-        NodeBuilderFlags[NodeBuilderFlags["WriteClassExpressionAsTypeLiteral"] = 2048] = "WriteClassExpressionAsTypeLiteral";
-        NodeBuilderFlags[NodeBuilderFlags["UseTypeOfFunction"] = 4096] = "UseTypeOfFunction";
-        NodeBuilderFlags[NodeBuilderFlags["OmitParameterModifiers"] = 8192] = "OmitParameterModifiers";
-        NodeBuilderFlags[NodeBuilderFlags["UseAliasDefinedOutsideCurrentScope"] = 16384] = "UseAliasDefinedOutsideCurrentScope";
-        // Error handling
-        NodeBuilderFlags[NodeBuilderFlags["AllowThisInObjectLiteral"] = 32768] = "AllowThisInObjectLiteral";
-        NodeBuilderFlags[NodeBuilderFlags["AllowQualifedNameInPlaceOfIdentifier"] = 65536] = "AllowQualifedNameInPlaceOfIdentifier";
-        NodeBuilderFlags[NodeBuilderFlags["AllowAnonymousIdentifier"] = 131072] = "AllowAnonymousIdentifier";
-        NodeBuilderFlags[NodeBuilderFlags["AllowEmptyUnionOrIntersection"] = 262144] = "AllowEmptyUnionOrIntersection";
-        NodeBuilderFlags[NodeBuilderFlags["AllowEmptyTuple"] = 524288] = "AllowEmptyTuple";
-        NodeBuilderFlags[NodeBuilderFlags["AllowUniqueESSymbolType"] = 1048576] = "AllowUniqueESSymbolType";
-        NodeBuilderFlags[NodeBuilderFlags["AllowEmptyIndexInfoType"] = 2097152] = "AllowEmptyIndexInfoType";
-        NodeBuilderFlags[NodeBuilderFlags["IgnoreErrors"] = 3112960] = "IgnoreErrors";
-        // State
-        NodeBuilderFlags[NodeBuilderFlags["InObjectTypeLiteral"] = 4194304] = "InObjectTypeLiteral";
-        NodeBuilderFlags[NodeBuilderFlags["InTypeAlias"] = 8388608] = "InTypeAlias";
-        NodeBuilderFlags[NodeBuilderFlags["InInitialEntityName"] = 16777216] = "InInitialEntityName";
-        NodeBuilderFlags[NodeBuilderFlags["InReverseMappedType"] = 33554432] = "InReverseMappedType";
-    })(NodeBuilderFlags = ts.NodeBuilderFlags || (ts.NodeBuilderFlags = {}));
-    // Ensure the shared flags between this and `NodeBuilderFlags` stay in alignment
-    var TypeFormatFlags;
-    (function (TypeFormatFlags) {
-        TypeFormatFlags[TypeFormatFlags["None"] = 0] = "None";
-        TypeFormatFlags[TypeFormatFlags["NoTruncation"] = 1] = "NoTruncation";
-        TypeFormatFlags[TypeFormatFlags["WriteArrayAsGenericType"] = 2] = "WriteArrayAsGenericType";
-        // hole because there's a hole in node builder flags
-        TypeFormatFlags[TypeFormatFlags["UseStructuralFallback"] = 8] = "UseStructuralFallback";
-        // hole because there's a hole in node builder flags
-        TypeFormatFlags[TypeFormatFlags["WriteTypeArgumentsOfSignature"] = 32] = "WriteTypeArgumentsOfSignature";
-        TypeFormatFlags[TypeFormatFlags["UseFullyQualifiedType"] = 64] = "UseFullyQualifiedType";
-        // hole because `UseOnlyExternalAliasing` is here in node builder flags, but functions which take old flags use `SymbolFormatFlags` instead
-        TypeFormatFlags[TypeFormatFlags["SuppressAnyReturnType"] = 256] = "SuppressAnyReturnType";
-        // hole because `WriteTypeParametersInQualifiedName` is here in node builder flags, but functions which take old flags use `SymbolFormatFlags` for this instead
-        TypeFormatFlags[TypeFormatFlags["MultilineObjectLiterals"] = 1024] = "MultilineObjectLiterals";
-        TypeFormatFlags[TypeFormatFlags["WriteClassExpressionAsTypeLiteral"] = 2048] = "WriteClassExpressionAsTypeLiteral";
-        TypeFormatFlags[TypeFormatFlags["UseTypeOfFunction"] = 4096] = "UseTypeOfFunction";
-        TypeFormatFlags[TypeFormatFlags["OmitParameterModifiers"] = 8192] = "OmitParameterModifiers";
-        TypeFormatFlags[TypeFormatFlags["UseAliasDefinedOutsideCurrentScope"] = 16384] = "UseAliasDefinedOutsideCurrentScope";
-        // even though `T` can't be accessed in the current scope.
-        // Error Handling
-        TypeFormatFlags[TypeFormatFlags["AllowUniqueESSymbolType"] = 1048576] = "AllowUniqueESSymbolType";
-        // TypeFormatFlags exclusive
-        TypeFormatFlags[TypeFormatFlags["AddUndefined"] = 131072] = "AddUndefined";
-        TypeFormatFlags[TypeFormatFlags["WriteArrowStyleSignature"] = 262144] = "WriteArrowStyleSignature";
-        // State
-        TypeFormatFlags[TypeFormatFlags["InArrayType"] = 524288] = "InArrayType";
-        TypeFormatFlags[TypeFormatFlags["InElementType"] = 2097152] = "InElementType";
-        TypeFormatFlags[TypeFormatFlags["InFirstTypeArgument"] = 4194304] = "InFirstTypeArgument";
-        TypeFormatFlags[TypeFormatFlags["InTypeAlias"] = 8388608] = "InTypeAlias";
-        /** @deprecated */ TypeFormatFlags[TypeFormatFlags["WriteOwnNameForAnyLike"] = 0] = "WriteOwnNameForAnyLike";
-        TypeFormatFlags[TypeFormatFlags["NodeBuilderFlagsMask"] = 9469291] = "NodeBuilderFlagsMask";
-    })(TypeFormatFlags = ts.TypeFormatFlags || (ts.TypeFormatFlags = {}));
-    var SymbolFormatFlags;
-    (function (SymbolFormatFlags) {
-        SymbolFormatFlags[SymbolFormatFlags["None"] = 0] = "None";
-        // Write symbols's type argument if it is instantiated symbol
-        // eg. class C<T> { p: T }   <-- Show p as C<T>.p here
-        //     var a: C<number>;
-        //     var p = a.p; <--- Here p is property of C<number> so show it as C<number>.p instead of just C.p
-        SymbolFormatFlags[SymbolFormatFlags["WriteTypeParametersOrArguments"] = 1] = "WriteTypeParametersOrArguments";
-        // Use only external alias information to get the symbol name in the given context
-        // eg.  module m { export class c { } } import x = m.c;
-        // When this flag is specified m.c will be used to refer to the class instead of alias symbol x
-        SymbolFormatFlags[SymbolFormatFlags["UseOnlyExternalAliasing"] = 2] = "UseOnlyExternalAliasing";
-        // Build symbol name using any nodes needed, instead of just components of an entity name
-        SymbolFormatFlags[SymbolFormatFlags["AllowAnyNodeKind"] = 4] = "AllowAnyNodeKind";
-        // Prefer aliases which are not directly visible
-        SymbolFormatFlags[SymbolFormatFlags["UseAliasDefinedOutsideCurrentScope"] = 8] = "UseAliasDefinedOutsideCurrentScope";
-    })(SymbolFormatFlags = ts.SymbolFormatFlags || (ts.SymbolFormatFlags = {}));
-    /* @internal */
-    var SymbolAccessibility;
-    (function (SymbolAccessibility) {
-        SymbolAccessibility[SymbolAccessibility["Accessible"] = 0] = "Accessible";
-        SymbolAccessibility[SymbolAccessibility["NotAccessible"] = 1] = "NotAccessible";
-        SymbolAccessibility[SymbolAccessibility["CannotBeNamed"] = 2] = "CannotBeNamed";
-    })(SymbolAccessibility = ts.SymbolAccessibility || (ts.SymbolAccessibility = {}));
-    /* @internal */
-    var SyntheticSymbolKind;
-    (function (SyntheticSymbolKind) {
-        SyntheticSymbolKind[SyntheticSymbolKind["UnionOrIntersection"] = 0] = "UnionOrIntersection";
-        SyntheticSymbolKind[SyntheticSymbolKind["Spread"] = 1] = "Spread";
-    })(SyntheticSymbolKind = ts.SyntheticSymbolKind || (ts.SyntheticSymbolKind = {}));
-    var TypePredicateKind;
-    (function (TypePredicateKind) {
-        TypePredicateKind[TypePredicateKind["This"] = 0] = "This";
-        TypePredicateKind[TypePredicateKind["Identifier"] = 1] = "Identifier";
-    })(TypePredicateKind = ts.TypePredicateKind || (ts.TypePredicateKind = {}));
-    /** Indicates how to serialize the name for a TypeReferenceNode when emitting decorator metadata */
-    /* @internal */
     var TypeReferenceSerializationKind;
     (function (TypeReferenceSerializationKind) {
         TypeReferenceSerializationKind[TypeReferenceSerializationKind["Unknown"] = 0] = "Unknown";
-        // should be emitted using a safe fallback.
         TypeReferenceSerializationKind[TypeReferenceSerializationKind["TypeWithConstructSignatureAndValue"] = 1] = "TypeWithConstructSignatureAndValue";
-        // function that can be reached at runtime (e.g. a `class`
-        // declaration or a `var` declaration for the static side
-        // of a type, such as the global `Promise` type in lib.d.ts).
         TypeReferenceSerializationKind[TypeReferenceSerializationKind["VoidNullableOrNeverType"] = 2] = "VoidNullableOrNeverType";
         TypeReferenceSerializationKind[TypeReferenceSerializationKind["NumberLikeType"] = 3] = "NumberLikeType";
         TypeReferenceSerializationKind[TypeReferenceSerializationKind["StringLikeType"] = 4] = "StringLikeType";
@@ -2661,331 +1724,8 @@ var ts;
         TypeReferenceSerializationKind[TypeReferenceSerializationKind["ESSymbolType"] = 7] = "ESSymbolType";
         TypeReferenceSerializationKind[TypeReferenceSerializationKind["Promise"] = 8] = "Promise";
         TypeReferenceSerializationKind[TypeReferenceSerializationKind["TypeWithCallSignature"] = 9] = "TypeWithCallSignature";
-        // with call signatures.
         TypeReferenceSerializationKind[TypeReferenceSerializationKind["ObjectType"] = 10] = "ObjectType";
     })(TypeReferenceSerializationKind = ts.TypeReferenceSerializationKind || (ts.TypeReferenceSerializationKind = {}));
-    var SymbolFlags;
-    (function (SymbolFlags) {
-        SymbolFlags[SymbolFlags["None"] = 0] = "None";
-        SymbolFlags[SymbolFlags["FunctionScopedVariable"] = 1] = "FunctionScopedVariable";
-        SymbolFlags[SymbolFlags["BlockScopedVariable"] = 2] = "BlockScopedVariable";
-        SymbolFlags[SymbolFlags["Property"] = 4] = "Property";
-        SymbolFlags[SymbolFlags["EnumMember"] = 8] = "EnumMember";
-        SymbolFlags[SymbolFlags["Function"] = 16] = "Function";
-        SymbolFlags[SymbolFlags["Class"] = 32] = "Class";
-        SymbolFlags[SymbolFlags["Interface"] = 64] = "Interface";
-        SymbolFlags[SymbolFlags["ConstEnum"] = 128] = "ConstEnum";
-        SymbolFlags[SymbolFlags["RegularEnum"] = 256] = "RegularEnum";
-        SymbolFlags[SymbolFlags["ValueModule"] = 512] = "ValueModule";
-        SymbolFlags[SymbolFlags["NamespaceModule"] = 1024] = "NamespaceModule";
-        SymbolFlags[SymbolFlags["TypeLiteral"] = 2048] = "TypeLiteral";
-        SymbolFlags[SymbolFlags["ObjectLiteral"] = 4096] = "ObjectLiteral";
-        SymbolFlags[SymbolFlags["Method"] = 8192] = "Method";
-        SymbolFlags[SymbolFlags["Constructor"] = 16384] = "Constructor";
-        SymbolFlags[SymbolFlags["GetAccessor"] = 32768] = "GetAccessor";
-        SymbolFlags[SymbolFlags["SetAccessor"] = 65536] = "SetAccessor";
-        SymbolFlags[SymbolFlags["Signature"] = 131072] = "Signature";
-        SymbolFlags[SymbolFlags["TypeParameter"] = 262144] = "TypeParameter";
-        SymbolFlags[SymbolFlags["TypeAlias"] = 524288] = "TypeAlias";
-        SymbolFlags[SymbolFlags["ExportValue"] = 1048576] = "ExportValue";
-        SymbolFlags[SymbolFlags["Alias"] = 2097152] = "Alias";
-        SymbolFlags[SymbolFlags["Prototype"] = 4194304] = "Prototype";
-        SymbolFlags[SymbolFlags["ExportStar"] = 8388608] = "ExportStar";
-        SymbolFlags[SymbolFlags["Optional"] = 16777216] = "Optional";
-        SymbolFlags[SymbolFlags["Transient"] = 33554432] = "Transient";
-        SymbolFlags[SymbolFlags["JSContainer"] = 67108864] = "JSContainer";
-        /* @internal */
-        SymbolFlags[SymbolFlags["All"] = 67108863] = "All";
-        SymbolFlags[SymbolFlags["Enum"] = 384] = "Enum";
-        SymbolFlags[SymbolFlags["Variable"] = 3] = "Variable";
-        SymbolFlags[SymbolFlags["Value"] = 67216319] = "Value";
-        SymbolFlags[SymbolFlags["Type"] = 67901928] = "Type";
-        SymbolFlags[SymbolFlags["Namespace"] = 1920] = "Namespace";
-        SymbolFlags[SymbolFlags["Module"] = 1536] = "Module";
-        SymbolFlags[SymbolFlags["Accessor"] = 98304] = "Accessor";
-        // Variables can be redeclared, but can not redeclare a block-scoped declaration with the
-        // same name, or any other value that is not a variable, e.g. ValueModule or Class
-        SymbolFlags[SymbolFlags["FunctionScopedVariableExcludes"] = 67216318] = "FunctionScopedVariableExcludes";
-        // Block-scoped declarations are not allowed to be re-declared
-        // they can not merge with anything in the value space
-        SymbolFlags[SymbolFlags["BlockScopedVariableExcludes"] = 67216319] = "BlockScopedVariableExcludes";
-        SymbolFlags[SymbolFlags["ParameterExcludes"] = 67216319] = "ParameterExcludes";
-        SymbolFlags[SymbolFlags["PropertyExcludes"] = 0] = "PropertyExcludes";
-        SymbolFlags[SymbolFlags["EnumMemberExcludes"] = 68008959] = "EnumMemberExcludes";
-        SymbolFlags[SymbolFlags["FunctionExcludes"] = 67215791] = "FunctionExcludes";
-        SymbolFlags[SymbolFlags["ClassExcludes"] = 68008383] = "ClassExcludes";
-        SymbolFlags[SymbolFlags["InterfaceExcludes"] = 67901832] = "InterfaceExcludes";
-        SymbolFlags[SymbolFlags["RegularEnumExcludes"] = 68008191] = "RegularEnumExcludes";
-        SymbolFlags[SymbolFlags["ConstEnumExcludes"] = 68008831] = "ConstEnumExcludes";
-        SymbolFlags[SymbolFlags["ValueModuleExcludes"] = 67215503] = "ValueModuleExcludes";
-        SymbolFlags[SymbolFlags["NamespaceModuleExcludes"] = 0] = "NamespaceModuleExcludes";
-        SymbolFlags[SymbolFlags["MethodExcludes"] = 67208127] = "MethodExcludes";
-        SymbolFlags[SymbolFlags["GetAccessorExcludes"] = 67150783] = "GetAccessorExcludes";
-        SymbolFlags[SymbolFlags["SetAccessorExcludes"] = 67183551] = "SetAccessorExcludes";
-        SymbolFlags[SymbolFlags["TypeParameterExcludes"] = 67639784] = "TypeParameterExcludes";
-        SymbolFlags[SymbolFlags["TypeAliasExcludes"] = 67901928] = "TypeAliasExcludes";
-        SymbolFlags[SymbolFlags["AliasExcludes"] = 2097152] = "AliasExcludes";
-        SymbolFlags[SymbolFlags["ModuleMember"] = 2623475] = "ModuleMember";
-        SymbolFlags[SymbolFlags["ExportHasLocal"] = 944] = "ExportHasLocal";
-        SymbolFlags[SymbolFlags["HasExports"] = 1952] = "HasExports";
-        SymbolFlags[SymbolFlags["HasMembers"] = 6240] = "HasMembers";
-        SymbolFlags[SymbolFlags["BlockScoped"] = 418] = "BlockScoped";
-        SymbolFlags[SymbolFlags["PropertyOrAccessor"] = 98308] = "PropertyOrAccessor";
-        SymbolFlags[SymbolFlags["ClassMember"] = 106500] = "ClassMember";
-        /* @internal */
-        // The set of things we consider semantically classifiable.  Used to speed up the LS during
-        // classification.
-        SymbolFlags[SymbolFlags["Classifiable"] = 2885600] = "Classifiable";
-        /* @internal */
-        SymbolFlags[SymbolFlags["LateBindingContainer"] = 6240] = "LateBindingContainer";
-    })(SymbolFlags = ts.SymbolFlags || (ts.SymbolFlags = {}));
-    /* @internal */
-    var EnumKind;
-    (function (EnumKind) {
-        EnumKind[EnumKind["Numeric"] = 0] = "Numeric";
-        EnumKind[EnumKind["Literal"] = 1] = "Literal"; // Literal enum (each member has a TypeFlags.EnumLiteral type)
-    })(EnumKind = ts.EnumKind || (ts.EnumKind = {}));
-    /* @internal */
-    var CheckFlags;
-    (function (CheckFlags) {
-        CheckFlags[CheckFlags["Instantiated"] = 1] = "Instantiated";
-        CheckFlags[CheckFlags["SyntheticProperty"] = 2] = "SyntheticProperty";
-        CheckFlags[CheckFlags["SyntheticMethod"] = 4] = "SyntheticMethod";
-        CheckFlags[CheckFlags["Readonly"] = 8] = "Readonly";
-        CheckFlags[CheckFlags["Partial"] = 16] = "Partial";
-        CheckFlags[CheckFlags["HasNonUniformType"] = 32] = "HasNonUniformType";
-        CheckFlags[CheckFlags["ContainsPublic"] = 64] = "ContainsPublic";
-        CheckFlags[CheckFlags["ContainsProtected"] = 128] = "ContainsProtected";
-        CheckFlags[CheckFlags["ContainsPrivate"] = 256] = "ContainsPrivate";
-        CheckFlags[CheckFlags["ContainsStatic"] = 512] = "ContainsStatic";
-        CheckFlags[CheckFlags["Late"] = 1024] = "Late";
-        CheckFlags[CheckFlags["ReverseMapped"] = 2048] = "ReverseMapped";
-        CheckFlags[CheckFlags["Synthetic"] = 6] = "Synthetic";
-    })(CheckFlags = ts.CheckFlags || (ts.CheckFlags = {}));
-    var InternalSymbolName;
-    (function (InternalSymbolName) {
-        InternalSymbolName["Call"] = "__call";
-        InternalSymbolName["Constructor"] = "__constructor";
-        InternalSymbolName["New"] = "__new";
-        InternalSymbolName["Index"] = "__index";
-        InternalSymbolName["ExportStar"] = "__export";
-        InternalSymbolName["Global"] = "__global";
-        InternalSymbolName["Missing"] = "__missing";
-        InternalSymbolName["Type"] = "__type";
-        InternalSymbolName["Object"] = "__object";
-        InternalSymbolName["JSXAttributes"] = "__jsxAttributes";
-        InternalSymbolName["Class"] = "__class";
-        InternalSymbolName["Function"] = "__function";
-        InternalSymbolName["Computed"] = "__computed";
-        InternalSymbolName["Resolving"] = "__resolving__";
-        InternalSymbolName["ExportEquals"] = "export=";
-        InternalSymbolName["Default"] = "default";
-    })(InternalSymbolName = ts.InternalSymbolName || (ts.InternalSymbolName = {}));
-    /* @internal */
-    var NodeCheckFlags;
-    (function (NodeCheckFlags) {
-        NodeCheckFlags[NodeCheckFlags["TypeChecked"] = 1] = "TypeChecked";
-        NodeCheckFlags[NodeCheckFlags["LexicalThis"] = 2] = "LexicalThis";
-        NodeCheckFlags[NodeCheckFlags["CaptureThis"] = 4] = "CaptureThis";
-        NodeCheckFlags[NodeCheckFlags["CaptureNewTarget"] = 8] = "CaptureNewTarget";
-        NodeCheckFlags[NodeCheckFlags["SuperInstance"] = 256] = "SuperInstance";
-        NodeCheckFlags[NodeCheckFlags["SuperStatic"] = 512] = "SuperStatic";
-        NodeCheckFlags[NodeCheckFlags["ContextChecked"] = 1024] = "ContextChecked";
-        NodeCheckFlags[NodeCheckFlags["AsyncMethodWithSuper"] = 2048] = "AsyncMethodWithSuper";
-        NodeCheckFlags[NodeCheckFlags["AsyncMethodWithSuperBinding"] = 4096] = "AsyncMethodWithSuperBinding";
-        NodeCheckFlags[NodeCheckFlags["CaptureArguments"] = 8192] = "CaptureArguments";
-        NodeCheckFlags[NodeCheckFlags["EnumValuesComputed"] = 16384] = "EnumValuesComputed";
-        NodeCheckFlags[NodeCheckFlags["LexicalModuleMergesWithClass"] = 32768] = "LexicalModuleMergesWithClass";
-        NodeCheckFlags[NodeCheckFlags["LoopWithCapturedBlockScopedBinding"] = 65536] = "LoopWithCapturedBlockScopedBinding";
-        NodeCheckFlags[NodeCheckFlags["CapturedBlockScopedBinding"] = 131072] = "CapturedBlockScopedBinding";
-        NodeCheckFlags[NodeCheckFlags["BlockScopedBindingInLoop"] = 262144] = "BlockScopedBindingInLoop";
-        NodeCheckFlags[NodeCheckFlags["ClassWithBodyScopedClassBinding"] = 524288] = "ClassWithBodyScopedClassBinding";
-        NodeCheckFlags[NodeCheckFlags["BodyScopedClassBinding"] = 1048576] = "BodyScopedClassBinding";
-        NodeCheckFlags[NodeCheckFlags["NeedsLoopOutParameter"] = 2097152] = "NeedsLoopOutParameter";
-        NodeCheckFlags[NodeCheckFlags["AssignmentsMarked"] = 4194304] = "AssignmentsMarked";
-        NodeCheckFlags[NodeCheckFlags["ClassWithConstructorReference"] = 8388608] = "ClassWithConstructorReference";
-        NodeCheckFlags[NodeCheckFlags["ConstructorReferenceInClass"] = 16777216] = "ConstructorReferenceInClass";
-    })(NodeCheckFlags = ts.NodeCheckFlags || (ts.NodeCheckFlags = {}));
-    var TypeFlags;
-    (function (TypeFlags) {
-        TypeFlags[TypeFlags["Any"] = 1] = "Any";
-        TypeFlags[TypeFlags["Unknown"] = 2] = "Unknown";
-        TypeFlags[TypeFlags["String"] = 4] = "String";
-        TypeFlags[TypeFlags["Number"] = 8] = "Number";
-        TypeFlags[TypeFlags["Boolean"] = 16] = "Boolean";
-        TypeFlags[TypeFlags["Enum"] = 32] = "Enum";
-        TypeFlags[TypeFlags["StringLiteral"] = 64] = "StringLiteral";
-        TypeFlags[TypeFlags["NumberLiteral"] = 128] = "NumberLiteral";
-        TypeFlags[TypeFlags["BooleanLiteral"] = 256] = "BooleanLiteral";
-        TypeFlags[TypeFlags["EnumLiteral"] = 512] = "EnumLiteral";
-        TypeFlags[TypeFlags["ESSymbol"] = 1024] = "ESSymbol";
-        TypeFlags[TypeFlags["UniqueESSymbol"] = 2048] = "UniqueESSymbol";
-        TypeFlags[TypeFlags["Void"] = 4096] = "Void";
-        TypeFlags[TypeFlags["Undefined"] = 8192] = "Undefined";
-        TypeFlags[TypeFlags["Null"] = 16384] = "Null";
-        TypeFlags[TypeFlags["Never"] = 32768] = "Never";
-        TypeFlags[TypeFlags["TypeParameter"] = 65536] = "TypeParameter";
-        TypeFlags[TypeFlags["Object"] = 131072] = "Object";
-        TypeFlags[TypeFlags["Union"] = 262144] = "Union";
-        TypeFlags[TypeFlags["Intersection"] = 524288] = "Intersection";
-        TypeFlags[TypeFlags["Index"] = 1048576] = "Index";
-        TypeFlags[TypeFlags["IndexedAccess"] = 2097152] = "IndexedAccess";
-        TypeFlags[TypeFlags["Conditional"] = 4194304] = "Conditional";
-        TypeFlags[TypeFlags["Substitution"] = 8388608] = "Substitution";
-        TypeFlags[TypeFlags["NonPrimitive"] = 16777216] = "NonPrimitive";
-        /* @internal */
-        TypeFlags[TypeFlags["FreshLiteral"] = 33554432] = "FreshLiteral";
-        /* @internal */
-        TypeFlags[TypeFlags["UnionOfUnitTypes"] = 67108864] = "UnionOfUnitTypes";
-        /* @internal */
-        TypeFlags[TypeFlags["ContainsWideningType"] = 134217728] = "ContainsWideningType";
-        /* @internal */
-        TypeFlags[TypeFlags["ContainsObjectLiteral"] = 268435456] = "ContainsObjectLiteral";
-        /* @internal */
-        TypeFlags[TypeFlags["ContainsAnyFunctionType"] = 536870912] = "ContainsAnyFunctionType";
-        /* @internal */
-        TypeFlags[TypeFlags["AnyOrUnknown"] = 3] = "AnyOrUnknown";
-        /* @internal */
-        TypeFlags[TypeFlags["Nullable"] = 24576] = "Nullable";
-        TypeFlags[TypeFlags["Literal"] = 448] = "Literal";
-        TypeFlags[TypeFlags["Unit"] = 27072] = "Unit";
-        TypeFlags[TypeFlags["StringOrNumberLiteral"] = 192] = "StringOrNumberLiteral";
-        /* @internal */
-        TypeFlags[TypeFlags["StringOrNumberLiteralOrUnique"] = 2240] = "StringOrNumberLiteralOrUnique";
-        /* @internal */
-        TypeFlags[TypeFlags["DefinitelyFalsy"] = 29120] = "DefinitelyFalsy";
-        TypeFlags[TypeFlags["PossiblyFalsy"] = 29148] = "PossiblyFalsy";
-        /* @internal */
-        TypeFlags[TypeFlags["Intrinsic"] = 16839967] = "Intrinsic";
-        /* @internal */
-        TypeFlags[TypeFlags["Primitive"] = 32764] = "Primitive";
-        TypeFlags[TypeFlags["StringLike"] = 68] = "StringLike";
-        TypeFlags[TypeFlags["NumberLike"] = 168] = "NumberLike";
-        TypeFlags[TypeFlags["BooleanLike"] = 272] = "BooleanLike";
-        TypeFlags[TypeFlags["EnumLike"] = 544] = "EnumLike";
-        TypeFlags[TypeFlags["ESSymbolLike"] = 3072] = "ESSymbolLike";
-        TypeFlags[TypeFlags["VoidLike"] = 12288] = "VoidLike";
-        /* @internal */
-        TypeFlags[TypeFlags["DisjointDomains"] = 16809468] = "DisjointDomains";
-        TypeFlags[TypeFlags["UnionOrIntersection"] = 786432] = "UnionOrIntersection";
-        TypeFlags[TypeFlags["StructuredType"] = 917504] = "StructuredType";
-        TypeFlags[TypeFlags["TypeVariable"] = 2162688] = "TypeVariable";
-        TypeFlags[TypeFlags["InstantiableNonPrimitive"] = 14745600] = "InstantiableNonPrimitive";
-        TypeFlags[TypeFlags["InstantiablePrimitive"] = 1048576] = "InstantiablePrimitive";
-        TypeFlags[TypeFlags["Instantiable"] = 15794176] = "Instantiable";
-        TypeFlags[TypeFlags["StructuredOrInstantiable"] = 16711680] = "StructuredOrInstantiable";
-        // 'Narrowable' types are types where narrowing actually narrows.
-        // This *should* be every type other than null, undefined, void, and never
-        TypeFlags[TypeFlags["Narrowable"] = 33492479] = "Narrowable";
-        TypeFlags[TypeFlags["NotUnionOrUnit"] = 16909315] = "NotUnionOrUnit";
-        /* @internal */
-        TypeFlags[TypeFlags["NotUnit"] = 16749629] = "NotUnit";
-        /* @internal */
-        TypeFlags[TypeFlags["RequiresWidening"] = 402653184] = "RequiresWidening";
-        /* @internal */
-        TypeFlags[TypeFlags["PropagatingFlags"] = 939524096] = "PropagatingFlags";
-        // The following flags are used for different purposes during union and intersection type construction
-        /* @internal */
-        TypeFlags[TypeFlags["NonWideningType"] = 134217728] = "NonWideningType";
-        /* @internal */
-        TypeFlags[TypeFlags["Wildcard"] = 268435456] = "Wildcard";
-        /* @internal */
-        TypeFlags[TypeFlags["EmptyObject"] = 536870912] = "EmptyObject";
-        /* @internal */
-        TypeFlags[TypeFlags["ConstructionFlags"] = 939524096] = "ConstructionFlags";
-        // The following flag is used for different purposes by maybeTypeOfKind
-        /* @internal */
-        TypeFlags[TypeFlags["GenericMappedType"] = 134217728] = "GenericMappedType";
-    })(TypeFlags = ts.TypeFlags || (ts.TypeFlags = {}));
-    var ObjectFlags;
-    (function (ObjectFlags) {
-        ObjectFlags[ObjectFlags["Class"] = 1] = "Class";
-        ObjectFlags[ObjectFlags["Interface"] = 2] = "Interface";
-        ObjectFlags[ObjectFlags["Reference"] = 4] = "Reference";
-        ObjectFlags[ObjectFlags["Tuple"] = 8] = "Tuple";
-        ObjectFlags[ObjectFlags["Anonymous"] = 16] = "Anonymous";
-        ObjectFlags[ObjectFlags["Mapped"] = 32] = "Mapped";
-        ObjectFlags[ObjectFlags["Instantiated"] = 64] = "Instantiated";
-        ObjectFlags[ObjectFlags["ObjectLiteral"] = 128] = "ObjectLiteral";
-        ObjectFlags[ObjectFlags["EvolvingArray"] = 256] = "EvolvingArray";
-        ObjectFlags[ObjectFlags["ObjectLiteralPatternWithComputedProperties"] = 512] = "ObjectLiteralPatternWithComputedProperties";
-        ObjectFlags[ObjectFlags["ContainsSpread"] = 1024] = "ContainsSpread";
-        ObjectFlags[ObjectFlags["ReverseMapped"] = 2048] = "ReverseMapped";
-        ObjectFlags[ObjectFlags["JsxAttributes"] = 4096] = "JsxAttributes";
-        ObjectFlags[ObjectFlags["MarkerType"] = 8192] = "MarkerType";
-        ObjectFlags[ObjectFlags["ClassOrInterface"] = 3] = "ClassOrInterface";
-    })(ObjectFlags = ts.ObjectFlags || (ts.ObjectFlags = {}));
-    /* @internal */
-    var Variance;
-    (function (Variance) {
-        Variance[Variance["Invariant"] = 0] = "Invariant";
-        Variance[Variance["Covariant"] = 1] = "Covariant";
-        Variance[Variance["Contravariant"] = 2] = "Contravariant";
-        Variance[Variance["Bivariant"] = 3] = "Bivariant";
-        Variance[Variance["Independent"] = 4] = "Independent";
-    })(Variance = ts.Variance || (ts.Variance = {}));
-    var SignatureKind;
-    (function (SignatureKind) {
-        SignatureKind[SignatureKind["Call"] = 0] = "Call";
-        SignatureKind[SignatureKind["Construct"] = 1] = "Construct";
-    })(SignatureKind = ts.SignatureKind || (ts.SignatureKind = {}));
-    var IndexKind;
-    (function (IndexKind) {
-        IndexKind[IndexKind["String"] = 0] = "String";
-        IndexKind[IndexKind["Number"] = 1] = "Number";
-    })(IndexKind = ts.IndexKind || (ts.IndexKind = {}));
-    var InferencePriority;
-    (function (InferencePriority) {
-        InferencePriority[InferencePriority["NakedTypeVariable"] = 1] = "NakedTypeVariable";
-        InferencePriority[InferencePriority["HomomorphicMappedType"] = 2] = "HomomorphicMappedType";
-        InferencePriority[InferencePriority["MappedTypeConstraint"] = 4] = "MappedTypeConstraint";
-        InferencePriority[InferencePriority["ReturnType"] = 8] = "ReturnType";
-        InferencePriority[InferencePriority["LiteralKeyof"] = 16] = "LiteralKeyof";
-        InferencePriority[InferencePriority["NoConstraints"] = 32] = "NoConstraints";
-        InferencePriority[InferencePriority["AlwaysStrict"] = 64] = "AlwaysStrict";
-        InferencePriority[InferencePriority["PriorityImpliesCombination"] = 28] = "PriorityImpliesCombination";
-    })(InferencePriority = ts.InferencePriority || (ts.InferencePriority = {}));
-    /* @internal */
-    var InferenceFlags;
-    (function (InferenceFlags) {
-        InferenceFlags[InferenceFlags["None"] = 0] = "None";
-        InferenceFlags[InferenceFlags["InferUnionTypes"] = 1] = "InferUnionTypes";
-        InferenceFlags[InferenceFlags["NoDefault"] = 2] = "NoDefault";
-        InferenceFlags[InferenceFlags["AnyDefault"] = 4] = "AnyDefault";
-    })(InferenceFlags = ts.InferenceFlags || (ts.InferenceFlags = {}));
-    /**
-     * Ternary values are defined such that
-     * x & y is False if either x or y is False.
-     * x & y is Maybe if either x or y is Maybe, but neither x or y is False.
-     * x & y is True if both x and y are True.
-     * x | y is False if both x and y are False.
-     * x | y is Maybe if either x or y is Maybe, but neither x or y is True.
-     * x | y is True if either x or y is True.
-     */
-    /* @internal */
-    var Ternary;
-    (function (Ternary) {
-        Ternary[Ternary["False"] = 0] = "False";
-        Ternary[Ternary["Maybe"] = 1] = "Maybe";
-        Ternary[Ternary["True"] = -1] = "True";
-    })(Ternary = ts.Ternary || (ts.Ternary = {}));
-    /* @internal */
-    var SpecialPropertyAssignmentKind;
-    (function (SpecialPropertyAssignmentKind) {
-        SpecialPropertyAssignmentKind[SpecialPropertyAssignmentKind["None"] = 0] = "None";
-        /// exports.name = expr
-        SpecialPropertyAssignmentKind[SpecialPropertyAssignmentKind["ExportsProperty"] = 1] = "ExportsProperty";
-        /// module.exports = expr
-        SpecialPropertyAssignmentKind[SpecialPropertyAssignmentKind["ModuleExports"] = 2] = "ModuleExports";
-        /// className.prototype.name = expr
-        SpecialPropertyAssignmentKind[SpecialPropertyAssignmentKind["PrototypeProperty"] = 3] = "PrototypeProperty";
-        /// this.name = expr
-        SpecialPropertyAssignmentKind[SpecialPropertyAssignmentKind["ThisProperty"] = 4] = "ThisProperty";
-        // F.name = expr
-        SpecialPropertyAssignmentKind[SpecialPropertyAssignmentKind["Property"] = 5] = "Property";
-        // F.prototype = { ... }
-        SpecialPropertyAssignmentKind[SpecialPropertyAssignmentKind["Prototype"] = 6] = "Prototype";
-    })(SpecialPropertyAssignmentKind = ts.SpecialPropertyAssignmentKind || (ts.SpecialPropertyAssignmentKind = {}));
     var DiagnosticCategory;
     (function (DiagnosticCategory) {
         DiagnosticCategory[DiagnosticCategory["Warning"] = 0] = "Warning";
@@ -2993,7 +1733,6 @@ var ts;
         DiagnosticCategory[DiagnosticCategory["Suggestion"] = 2] = "Suggestion";
         DiagnosticCategory[DiagnosticCategory["Message"] = 3] = "Message";
     })(DiagnosticCategory = ts.DiagnosticCategory || (ts.DiagnosticCategory = {}));
-    /* @internal */
     function diagnosticCategoryName(d, lowerCase) {
         if (lowerCase === void 0) { lowerCase = true; }
         var name = DiagnosticCategory[d.category];
@@ -3015,455 +1754,9 @@ var ts;
         ModuleKind[ModuleKind["ES2015"] = 5] = "ES2015";
         ModuleKind[ModuleKind["ESNext"] = 6] = "ESNext";
     })(ModuleKind = ts.ModuleKind || (ts.ModuleKind = {}));
-    var JsxEmit;
-    (function (JsxEmit) {
-        JsxEmit[JsxEmit["None"] = 0] = "None";
-        JsxEmit[JsxEmit["Preserve"] = 1] = "Preserve";
-        JsxEmit[JsxEmit["React"] = 2] = "React";
-        JsxEmit[JsxEmit["ReactNative"] = 3] = "ReactNative";
-    })(JsxEmit = ts.JsxEmit || (ts.JsxEmit = {}));
-    var NewLineKind;
-    (function (NewLineKind) {
-        NewLineKind[NewLineKind["CarriageReturnLineFeed"] = 0] = "CarriageReturnLineFeed";
-        NewLineKind[NewLineKind["LineFeed"] = 1] = "LineFeed";
-    })(NewLineKind = ts.NewLineKind || (ts.NewLineKind = {}));
-    var ScriptKind;
-    (function (ScriptKind) {
-        ScriptKind[ScriptKind["Unknown"] = 0] = "Unknown";
-        ScriptKind[ScriptKind["JS"] = 1] = "JS";
-        ScriptKind[ScriptKind["JSX"] = 2] = "JSX";
-        ScriptKind[ScriptKind["TS"] = 3] = "TS";
-        ScriptKind[ScriptKind["TSX"] = 4] = "TSX";
-        ScriptKind[ScriptKind["External"] = 5] = "External";
-        ScriptKind[ScriptKind["JSON"] = 6] = "JSON";
-        /**
-         * Used on extensions that doesn't define the ScriptKind but the content defines it.
-         * Deferred extensions are going to be included in all project contexts.
-         */
-        ScriptKind[ScriptKind["Deferred"] = 7] = "Deferred";
-    })(ScriptKind = ts.ScriptKind || (ts.ScriptKind = {}));
-    var ScriptTarget;
-    (function (ScriptTarget) {
-        ScriptTarget[ScriptTarget["ES3"] = 0] = "ES3";
-        ScriptTarget[ScriptTarget["ES5"] = 1] = "ES5";
-        ScriptTarget[ScriptTarget["ES2015"] = 2] = "ES2015";
-        ScriptTarget[ScriptTarget["ES2016"] = 3] = "ES2016";
-        ScriptTarget[ScriptTarget["ES2017"] = 4] = "ES2017";
-        ScriptTarget[ScriptTarget["ES2018"] = 5] = "ES2018";
-        ScriptTarget[ScriptTarget["ESNext"] = 6] = "ESNext";
-        ScriptTarget[ScriptTarget["JSON"] = 100] = "JSON";
-        ScriptTarget[ScriptTarget["Latest"] = 6] = "Latest";
-    })(ScriptTarget = ts.ScriptTarget || (ts.ScriptTarget = {}));
-    var LanguageVariant;
-    (function (LanguageVariant) {
-        LanguageVariant[LanguageVariant["Standard"] = 0] = "Standard";
-        LanguageVariant[LanguageVariant["JSX"] = 1] = "JSX";
-    })(LanguageVariant = ts.LanguageVariant || (ts.LanguageVariant = {}));
-    var WatchDirectoryFlags;
-    (function (WatchDirectoryFlags) {
-        WatchDirectoryFlags[WatchDirectoryFlags["None"] = 0] = "None";
-        WatchDirectoryFlags[WatchDirectoryFlags["Recursive"] = 1] = "Recursive";
-    })(WatchDirectoryFlags = ts.WatchDirectoryFlags || (ts.WatchDirectoryFlags = {}));
-    /* @internal */
-    var CharacterCodes;
-    (function (CharacterCodes) {
-        CharacterCodes[CharacterCodes["nullCharacter"] = 0] = "nullCharacter";
-        CharacterCodes[CharacterCodes["maxAsciiCharacter"] = 127] = "maxAsciiCharacter";
-        CharacterCodes[CharacterCodes["lineFeed"] = 10] = "lineFeed";
-        CharacterCodes[CharacterCodes["carriageReturn"] = 13] = "carriageReturn";
-        CharacterCodes[CharacterCodes["lineSeparator"] = 8232] = "lineSeparator";
-        CharacterCodes[CharacterCodes["paragraphSeparator"] = 8233] = "paragraphSeparator";
-        CharacterCodes[CharacterCodes["nextLine"] = 133] = "nextLine";
-        // Unicode 3.0 space characters
-        CharacterCodes[CharacterCodes["space"] = 32] = "space";
-        CharacterCodes[CharacterCodes["nonBreakingSpace"] = 160] = "nonBreakingSpace";
-        CharacterCodes[CharacterCodes["enQuad"] = 8192] = "enQuad";
-        CharacterCodes[CharacterCodes["emQuad"] = 8193] = "emQuad";
-        CharacterCodes[CharacterCodes["enSpace"] = 8194] = "enSpace";
-        CharacterCodes[CharacterCodes["emSpace"] = 8195] = "emSpace";
-        CharacterCodes[CharacterCodes["threePerEmSpace"] = 8196] = "threePerEmSpace";
-        CharacterCodes[CharacterCodes["fourPerEmSpace"] = 8197] = "fourPerEmSpace";
-        CharacterCodes[CharacterCodes["sixPerEmSpace"] = 8198] = "sixPerEmSpace";
-        CharacterCodes[CharacterCodes["figureSpace"] = 8199] = "figureSpace";
-        CharacterCodes[CharacterCodes["punctuationSpace"] = 8200] = "punctuationSpace";
-        CharacterCodes[CharacterCodes["thinSpace"] = 8201] = "thinSpace";
-        CharacterCodes[CharacterCodes["hairSpace"] = 8202] = "hairSpace";
-        CharacterCodes[CharacterCodes["zeroWidthSpace"] = 8203] = "zeroWidthSpace";
-        CharacterCodes[CharacterCodes["narrowNoBreakSpace"] = 8239] = "narrowNoBreakSpace";
-        CharacterCodes[CharacterCodes["ideographicSpace"] = 12288] = "ideographicSpace";
-        CharacterCodes[CharacterCodes["mathematicalSpace"] = 8287] = "mathematicalSpace";
-        CharacterCodes[CharacterCodes["ogham"] = 5760] = "ogham";
-        CharacterCodes[CharacterCodes["_"] = 95] = "_";
-        CharacterCodes[CharacterCodes["$"] = 36] = "$";
-        CharacterCodes[CharacterCodes["_0"] = 48] = "_0";
-        CharacterCodes[CharacterCodes["_1"] = 49] = "_1";
-        CharacterCodes[CharacterCodes["_2"] = 50] = "_2";
-        CharacterCodes[CharacterCodes["_3"] = 51] = "_3";
-        CharacterCodes[CharacterCodes["_4"] = 52] = "_4";
-        CharacterCodes[CharacterCodes["_5"] = 53] = "_5";
-        CharacterCodes[CharacterCodes["_6"] = 54] = "_6";
-        CharacterCodes[CharacterCodes["_7"] = 55] = "_7";
-        CharacterCodes[CharacterCodes["_8"] = 56] = "_8";
-        CharacterCodes[CharacterCodes["_9"] = 57] = "_9";
-        CharacterCodes[CharacterCodes["a"] = 97] = "a";
-        CharacterCodes[CharacterCodes["b"] = 98] = "b";
-        CharacterCodes[CharacterCodes["c"] = 99] = "c";
-        CharacterCodes[CharacterCodes["d"] = 100] = "d";
-        CharacterCodes[CharacterCodes["e"] = 101] = "e";
-        CharacterCodes[CharacterCodes["f"] = 102] = "f";
-        CharacterCodes[CharacterCodes["g"] = 103] = "g";
-        CharacterCodes[CharacterCodes["h"] = 104] = "h";
-        CharacterCodes[CharacterCodes["i"] = 105] = "i";
-        CharacterCodes[CharacterCodes["j"] = 106] = "j";
-        CharacterCodes[CharacterCodes["k"] = 107] = "k";
-        CharacterCodes[CharacterCodes["l"] = 108] = "l";
-        CharacterCodes[CharacterCodes["m"] = 109] = "m";
-        CharacterCodes[CharacterCodes["n"] = 110] = "n";
-        CharacterCodes[CharacterCodes["o"] = 111] = "o";
-        CharacterCodes[CharacterCodes["p"] = 112] = "p";
-        CharacterCodes[CharacterCodes["q"] = 113] = "q";
-        CharacterCodes[CharacterCodes["r"] = 114] = "r";
-        CharacterCodes[CharacterCodes["s"] = 115] = "s";
-        CharacterCodes[CharacterCodes["t"] = 116] = "t";
-        CharacterCodes[CharacterCodes["u"] = 117] = "u";
-        CharacterCodes[CharacterCodes["v"] = 118] = "v";
-        CharacterCodes[CharacterCodes["w"] = 119] = "w";
-        CharacterCodes[CharacterCodes["x"] = 120] = "x";
-        CharacterCodes[CharacterCodes["y"] = 121] = "y";
-        CharacterCodes[CharacterCodes["z"] = 122] = "z";
-        CharacterCodes[CharacterCodes["A"] = 65] = "A";
-        CharacterCodes[CharacterCodes["B"] = 66] = "B";
-        CharacterCodes[CharacterCodes["C"] = 67] = "C";
-        CharacterCodes[CharacterCodes["D"] = 68] = "D";
-        CharacterCodes[CharacterCodes["E"] = 69] = "E";
-        CharacterCodes[CharacterCodes["F"] = 70] = "F";
-        CharacterCodes[CharacterCodes["G"] = 71] = "G";
-        CharacterCodes[CharacterCodes["H"] = 72] = "H";
-        CharacterCodes[CharacterCodes["I"] = 73] = "I";
-        CharacterCodes[CharacterCodes["J"] = 74] = "J";
-        CharacterCodes[CharacterCodes["K"] = 75] = "K";
-        CharacterCodes[CharacterCodes["L"] = 76] = "L";
-        CharacterCodes[CharacterCodes["M"] = 77] = "M";
-        CharacterCodes[CharacterCodes["N"] = 78] = "N";
-        CharacterCodes[CharacterCodes["O"] = 79] = "O";
-        CharacterCodes[CharacterCodes["P"] = 80] = "P";
-        CharacterCodes[CharacterCodes["Q"] = 81] = "Q";
-        CharacterCodes[CharacterCodes["R"] = 82] = "R";
-        CharacterCodes[CharacterCodes["S"] = 83] = "S";
-        CharacterCodes[CharacterCodes["T"] = 84] = "T";
-        CharacterCodes[CharacterCodes["U"] = 85] = "U";
-        CharacterCodes[CharacterCodes["V"] = 86] = "V";
-        CharacterCodes[CharacterCodes["W"] = 87] = "W";
-        CharacterCodes[CharacterCodes["X"] = 88] = "X";
-        CharacterCodes[CharacterCodes["Y"] = 89] = "Y";
-        CharacterCodes[CharacterCodes["Z"] = 90] = "Z";
-        CharacterCodes[CharacterCodes["ampersand"] = 38] = "ampersand";
-        CharacterCodes[CharacterCodes["asterisk"] = 42] = "asterisk";
-        CharacterCodes[CharacterCodes["at"] = 64] = "at";
-        CharacterCodes[CharacterCodes["backslash"] = 92] = "backslash";
-        CharacterCodes[CharacterCodes["backtick"] = 96] = "backtick";
-        CharacterCodes[CharacterCodes["bar"] = 124] = "bar";
-        CharacterCodes[CharacterCodes["caret"] = 94] = "caret";
-        CharacterCodes[CharacterCodes["closeBrace"] = 125] = "closeBrace";
-        CharacterCodes[CharacterCodes["closeBracket"] = 93] = "closeBracket";
-        CharacterCodes[CharacterCodes["closeParen"] = 41] = "closeParen";
-        CharacterCodes[CharacterCodes["colon"] = 58] = "colon";
-        CharacterCodes[CharacterCodes["comma"] = 44] = "comma";
-        CharacterCodes[CharacterCodes["dot"] = 46] = "dot";
-        CharacterCodes[CharacterCodes["doubleQuote"] = 34] = "doubleQuote";
-        CharacterCodes[CharacterCodes["equals"] = 61] = "equals";
-        CharacterCodes[CharacterCodes["exclamation"] = 33] = "exclamation";
-        CharacterCodes[CharacterCodes["greaterThan"] = 62] = "greaterThan";
-        CharacterCodes[CharacterCodes["hash"] = 35] = "hash";
-        CharacterCodes[CharacterCodes["lessThan"] = 60] = "lessThan";
-        CharacterCodes[CharacterCodes["minus"] = 45] = "minus";
-        CharacterCodes[CharacterCodes["openBrace"] = 123] = "openBrace";
-        CharacterCodes[CharacterCodes["openBracket"] = 91] = "openBracket";
-        CharacterCodes[CharacterCodes["openParen"] = 40] = "openParen";
-        CharacterCodes[CharacterCodes["percent"] = 37] = "percent";
-        CharacterCodes[CharacterCodes["plus"] = 43] = "plus";
-        CharacterCodes[CharacterCodes["question"] = 63] = "question";
-        CharacterCodes[CharacterCodes["semicolon"] = 59] = "semicolon";
-        CharacterCodes[CharacterCodes["singleQuote"] = 39] = "singleQuote";
-        CharacterCodes[CharacterCodes["slash"] = 47] = "slash";
-        CharacterCodes[CharacterCodes["tilde"] = 126] = "tilde";
-        CharacterCodes[CharacterCodes["backspace"] = 8] = "backspace";
-        CharacterCodes[CharacterCodes["formFeed"] = 12] = "formFeed";
-        CharacterCodes[CharacterCodes["byteOrderMark"] = 65279] = "byteOrderMark";
-        CharacterCodes[CharacterCodes["tab"] = 9] = "tab";
-        CharacterCodes[CharacterCodes["verticalTab"] = 11] = "verticalTab";
-    })(CharacterCodes = ts.CharacterCodes || (ts.CharacterCodes = {}));
-    var Extension;
-    (function (Extension) {
-        Extension["Ts"] = ".ts";
-        Extension["Tsx"] = ".tsx";
-        Extension["Dts"] = ".d.ts";
-        Extension["Js"] = ".js";
-        Extension["Jsx"] = ".jsx";
-        Extension["Json"] = ".json";
-    })(Extension = ts.Extension || (ts.Extension = {}));
-    /* @internal */
-    var TransformFlags;
-    (function (TransformFlags) {
-        TransformFlags[TransformFlags["None"] = 0] = "None";
-        // Facts
-        // - Flags used to indicate that a node or subtree contains syntax that requires transformation.
-        TransformFlags[TransformFlags["TypeScript"] = 1] = "TypeScript";
-        TransformFlags[TransformFlags["ContainsTypeScript"] = 2] = "ContainsTypeScript";
-        TransformFlags[TransformFlags["ContainsJsx"] = 4] = "ContainsJsx";
-        TransformFlags[TransformFlags["ContainsESNext"] = 8] = "ContainsESNext";
-        TransformFlags[TransformFlags["ContainsES2017"] = 16] = "ContainsES2017";
-        TransformFlags[TransformFlags["ContainsES2016"] = 32] = "ContainsES2016";
-        TransformFlags[TransformFlags["ES2015"] = 64] = "ES2015";
-        TransformFlags[TransformFlags["ContainsES2015"] = 128] = "ContainsES2015";
-        TransformFlags[TransformFlags["Generator"] = 256] = "Generator";
-        TransformFlags[TransformFlags["ContainsGenerator"] = 512] = "ContainsGenerator";
-        TransformFlags[TransformFlags["DestructuringAssignment"] = 1024] = "DestructuringAssignment";
-        TransformFlags[TransformFlags["ContainsDestructuringAssignment"] = 2048] = "ContainsDestructuringAssignment";
-        // Markers
-        // - Flags used to indicate that a subtree contains a specific transformation.
-        TransformFlags[TransformFlags["ContainsDecorators"] = 4096] = "ContainsDecorators";
-        TransformFlags[TransformFlags["ContainsPropertyInitializer"] = 8192] = "ContainsPropertyInitializer";
-        TransformFlags[TransformFlags["ContainsLexicalThis"] = 16384] = "ContainsLexicalThis";
-        TransformFlags[TransformFlags["ContainsCapturedLexicalThis"] = 32768] = "ContainsCapturedLexicalThis";
-        TransformFlags[TransformFlags["ContainsLexicalThisInComputedPropertyName"] = 65536] = "ContainsLexicalThisInComputedPropertyName";
-        TransformFlags[TransformFlags["ContainsDefaultValueAssignments"] = 131072] = "ContainsDefaultValueAssignments";
-        TransformFlags[TransformFlags["ContainsParameterPropertyAssignments"] = 262144] = "ContainsParameterPropertyAssignments";
-        TransformFlags[TransformFlags["ContainsSpread"] = 524288] = "ContainsSpread";
-        TransformFlags[TransformFlags["ContainsObjectSpread"] = 1048576] = "ContainsObjectSpread";
-        TransformFlags[TransformFlags["ContainsRest"] = 524288] = "ContainsRest";
-        TransformFlags[TransformFlags["ContainsObjectRest"] = 1048576] = "ContainsObjectRest";
-        TransformFlags[TransformFlags["ContainsComputedPropertyName"] = 2097152] = "ContainsComputedPropertyName";
-        TransformFlags[TransformFlags["ContainsBlockScopedBinding"] = 4194304] = "ContainsBlockScopedBinding";
-        TransformFlags[TransformFlags["ContainsBindingPattern"] = 8388608] = "ContainsBindingPattern";
-        TransformFlags[TransformFlags["ContainsYield"] = 16777216] = "ContainsYield";
-        TransformFlags[TransformFlags["ContainsHoistedDeclarationOrCompletion"] = 33554432] = "ContainsHoistedDeclarationOrCompletion";
-        TransformFlags[TransformFlags["ContainsDynamicImport"] = 67108864] = "ContainsDynamicImport";
-        TransformFlags[TransformFlags["Super"] = 134217728] = "Super";
-        TransformFlags[TransformFlags["ContainsSuper"] = 268435456] = "ContainsSuper";
-        // Please leave this as 1 << 29.
-        // It is the maximum bit we can set before we outgrow the size of a v8 small integer (SMI) on an x86 system.
-        // It is a good reminder of how much room we have left
-        TransformFlags[TransformFlags["HasComputedFlags"] = 536870912] = "HasComputedFlags";
-        // Assertions
-        // - Bitmasks that are used to assert facts about the syntax of a node and its subtree.
-        TransformFlags[TransformFlags["AssertTypeScript"] = 3] = "AssertTypeScript";
-        TransformFlags[TransformFlags["AssertJsx"] = 4] = "AssertJsx";
-        TransformFlags[TransformFlags["AssertESNext"] = 8] = "AssertESNext";
-        TransformFlags[TransformFlags["AssertES2017"] = 16] = "AssertES2017";
-        TransformFlags[TransformFlags["AssertES2016"] = 32] = "AssertES2016";
-        TransformFlags[TransformFlags["AssertES2015"] = 192] = "AssertES2015";
-        TransformFlags[TransformFlags["AssertGenerator"] = 768] = "AssertGenerator";
-        TransformFlags[TransformFlags["AssertDestructuringAssignment"] = 3072] = "AssertDestructuringAssignment";
-        // Scope Exclusions
-        // - Bitmasks that exclude flags from propagating out of a specific context
-        //   into the subtree flags of their container.
-        TransformFlags[TransformFlags["OuterExpressionExcludes"] = 536872257] = "OuterExpressionExcludes";
-        TransformFlags[TransformFlags["PropertyAccessExcludes"] = 671089985] = "PropertyAccessExcludes";
-        TransformFlags[TransformFlags["NodeExcludes"] = 939525441] = "NodeExcludes";
-        TransformFlags[TransformFlags["ArrowFunctionExcludes"] = 1003902273] = "ArrowFunctionExcludes";
-        TransformFlags[TransformFlags["FunctionExcludes"] = 1003935041] = "FunctionExcludes";
-        TransformFlags[TransformFlags["ConstructorExcludes"] = 1003668801] = "ConstructorExcludes";
-        TransformFlags[TransformFlags["MethodOrAccessorExcludes"] = 1003668801] = "MethodOrAccessorExcludes";
-        TransformFlags[TransformFlags["ClassExcludes"] = 942011713] = "ClassExcludes";
-        TransformFlags[TransformFlags["ModuleExcludes"] = 977327425] = "ModuleExcludes";
-        TransformFlags[TransformFlags["TypeExcludes"] = -3] = "TypeExcludes";
-        TransformFlags[TransformFlags["ObjectLiteralExcludes"] = 942740801] = "ObjectLiteralExcludes";
-        TransformFlags[TransformFlags["ArrayLiteralOrCallOrNewExcludes"] = 940049729] = "ArrayLiteralOrCallOrNewExcludes";
-        TransformFlags[TransformFlags["VariableDeclarationListExcludes"] = 948962625] = "VariableDeclarationListExcludes";
-        TransformFlags[TransformFlags["ParameterExcludes"] = 939525441] = "ParameterExcludes";
-        TransformFlags[TransformFlags["CatchClauseExcludes"] = 940574017] = "CatchClauseExcludes";
-        TransformFlags[TransformFlags["BindingPatternExcludes"] = 940049729] = "BindingPatternExcludes";
-        // Masks
-        // - Additional bitmasks
-        TransformFlags[TransformFlags["TypeScriptClassSyntaxMask"] = 274432] = "TypeScriptClassSyntaxMask";
-        TransformFlags[TransformFlags["ES2015FunctionSyntaxMask"] = 163840] = "ES2015FunctionSyntaxMask";
-    })(TransformFlags = ts.TransformFlags || (ts.TransformFlags = {}));
-    var EmitFlags;
-    (function (EmitFlags) {
-        EmitFlags[EmitFlags["None"] = 0] = "None";
-        EmitFlags[EmitFlags["SingleLine"] = 1] = "SingleLine";
-        EmitFlags[EmitFlags["AdviseOnEmitNode"] = 2] = "AdviseOnEmitNode";
-        EmitFlags[EmitFlags["NoSubstitution"] = 4] = "NoSubstitution";
-        EmitFlags[EmitFlags["CapturesThis"] = 8] = "CapturesThis";
-        EmitFlags[EmitFlags["NoLeadingSourceMap"] = 16] = "NoLeadingSourceMap";
-        EmitFlags[EmitFlags["NoTrailingSourceMap"] = 32] = "NoTrailingSourceMap";
-        EmitFlags[EmitFlags["NoSourceMap"] = 48] = "NoSourceMap";
-        EmitFlags[EmitFlags["NoNestedSourceMaps"] = 64] = "NoNestedSourceMaps";
-        EmitFlags[EmitFlags["NoTokenLeadingSourceMaps"] = 128] = "NoTokenLeadingSourceMaps";
-        EmitFlags[EmitFlags["NoTokenTrailingSourceMaps"] = 256] = "NoTokenTrailingSourceMaps";
-        EmitFlags[EmitFlags["NoTokenSourceMaps"] = 384] = "NoTokenSourceMaps";
-        EmitFlags[EmitFlags["NoLeadingComments"] = 512] = "NoLeadingComments";
-        EmitFlags[EmitFlags["NoTrailingComments"] = 1024] = "NoTrailingComments";
-        EmitFlags[EmitFlags["NoComments"] = 1536] = "NoComments";
-        EmitFlags[EmitFlags["NoNestedComments"] = 2048] = "NoNestedComments";
-        EmitFlags[EmitFlags["HelperName"] = 4096] = "HelperName";
-        EmitFlags[EmitFlags["ExportName"] = 8192] = "ExportName";
-        EmitFlags[EmitFlags["LocalName"] = 16384] = "LocalName";
-        EmitFlags[EmitFlags["InternalName"] = 32768] = "InternalName";
-        EmitFlags[EmitFlags["Indented"] = 65536] = "Indented";
-        EmitFlags[EmitFlags["NoIndentation"] = 131072] = "NoIndentation";
-        EmitFlags[EmitFlags["AsyncFunctionBody"] = 262144] = "AsyncFunctionBody";
-        EmitFlags[EmitFlags["ReuseTempVariableScope"] = 524288] = "ReuseTempVariableScope";
-        EmitFlags[EmitFlags["CustomPrologue"] = 1048576] = "CustomPrologue";
-        EmitFlags[EmitFlags["NoHoisting"] = 2097152] = "NoHoisting";
-        EmitFlags[EmitFlags["HasEndOfDeclarationMarker"] = 4194304] = "HasEndOfDeclarationMarker";
-        EmitFlags[EmitFlags["Iterator"] = 8388608] = "Iterator";
-        EmitFlags[EmitFlags["NoAsciiEscaping"] = 16777216] = "NoAsciiEscaping";
-        /*@internal*/ EmitFlags[EmitFlags["TypeScriptClassWrapper"] = 33554432] = "TypeScriptClassWrapper";
-        /*@internal*/ EmitFlags[EmitFlags["NeverApplyImportHelper"] = 67108864] = "NeverApplyImportHelper";
-    })(EmitFlags = ts.EmitFlags || (ts.EmitFlags = {}));
-    /**
-     * Used by the checker, this enum keeps track of external emit helpers that should be type
-     * checked.
-     */
-    /* @internal */
-    var ExternalEmitHelpers;
-    (function (ExternalEmitHelpers) {
-        ExternalEmitHelpers[ExternalEmitHelpers["Extends"] = 1] = "Extends";
-        ExternalEmitHelpers[ExternalEmitHelpers["Assign"] = 2] = "Assign";
-        ExternalEmitHelpers[ExternalEmitHelpers["Rest"] = 4] = "Rest";
-        ExternalEmitHelpers[ExternalEmitHelpers["Decorate"] = 8] = "Decorate";
-        ExternalEmitHelpers[ExternalEmitHelpers["Metadata"] = 16] = "Metadata";
-        ExternalEmitHelpers[ExternalEmitHelpers["Param"] = 32] = "Param";
-        ExternalEmitHelpers[ExternalEmitHelpers["Awaiter"] = 64] = "Awaiter";
-        ExternalEmitHelpers[ExternalEmitHelpers["Generator"] = 128] = "Generator";
-        ExternalEmitHelpers[ExternalEmitHelpers["Values"] = 256] = "Values";
-        ExternalEmitHelpers[ExternalEmitHelpers["Read"] = 512] = "Read";
-        ExternalEmitHelpers[ExternalEmitHelpers["Spread"] = 1024] = "Spread";
-        ExternalEmitHelpers[ExternalEmitHelpers["Await"] = 2048] = "Await";
-        ExternalEmitHelpers[ExternalEmitHelpers["AsyncGenerator"] = 4096] = "AsyncGenerator";
-        ExternalEmitHelpers[ExternalEmitHelpers["AsyncDelegator"] = 8192] = "AsyncDelegator";
-        ExternalEmitHelpers[ExternalEmitHelpers["AsyncValues"] = 16384] = "AsyncValues";
-        ExternalEmitHelpers[ExternalEmitHelpers["ExportStar"] = 32768] = "ExportStar";
-        ExternalEmitHelpers[ExternalEmitHelpers["MakeTemplateObject"] = 65536] = "MakeTemplateObject";
-        ExternalEmitHelpers[ExternalEmitHelpers["FirstEmitHelper"] = 1] = "FirstEmitHelper";
-        ExternalEmitHelpers[ExternalEmitHelpers["LastEmitHelper"] = 65536] = "LastEmitHelper";
-        // Helpers included by ES2015 for..of
-        ExternalEmitHelpers[ExternalEmitHelpers["ForOfIncludes"] = 256] = "ForOfIncludes";
-        // Helpers included by ES2017 for..await..of
-        ExternalEmitHelpers[ExternalEmitHelpers["ForAwaitOfIncludes"] = 16384] = "ForAwaitOfIncludes";
-        // Helpers included by ES2017 async generators
-        ExternalEmitHelpers[ExternalEmitHelpers["AsyncGeneratorIncludes"] = 6144] = "AsyncGeneratorIncludes";
-        // Helpers included by yield* in ES2017 async generators
-        ExternalEmitHelpers[ExternalEmitHelpers["AsyncDelegatorIncludes"] = 26624] = "AsyncDelegatorIncludes";
-        // Helpers included by ES2015 spread
-        ExternalEmitHelpers[ExternalEmitHelpers["SpreadIncludes"] = 1536] = "SpreadIncludes";
-    })(ExternalEmitHelpers = ts.ExternalEmitHelpers || (ts.ExternalEmitHelpers = {}));
-    var EmitHint;
-    (function (EmitHint) {
-        EmitHint[EmitHint["SourceFile"] = 0] = "SourceFile";
-        EmitHint[EmitHint["Expression"] = 1] = "Expression";
-        EmitHint[EmitHint["IdentifierName"] = 2] = "IdentifierName";
-        EmitHint[EmitHint["MappedTypeParameter"] = 3] = "MappedTypeParameter";
-        EmitHint[EmitHint["Unspecified"] = 4] = "Unspecified";
-    })(EmitHint = ts.EmitHint || (ts.EmitHint = {}));
-    var ListFormat;
-    (function (ListFormat) {
-        ListFormat[ListFormat["None"] = 0] = "None";
-        // Line separators
-        ListFormat[ListFormat["SingleLine"] = 0] = "SingleLine";
-        ListFormat[ListFormat["MultiLine"] = 1] = "MultiLine";
-        ListFormat[ListFormat["PreserveLines"] = 2] = "PreserveLines";
-        ListFormat[ListFormat["LinesMask"] = 3] = "LinesMask";
-        // Delimiters
-        ListFormat[ListFormat["NotDelimited"] = 0] = "NotDelimited";
-        ListFormat[ListFormat["BarDelimited"] = 4] = "BarDelimited";
-        ListFormat[ListFormat["AmpersandDelimited"] = 8] = "AmpersandDelimited";
-        ListFormat[ListFormat["CommaDelimited"] = 16] = "CommaDelimited";
-        ListFormat[ListFormat["DelimitersMask"] = 28] = "DelimitersMask";
-        ListFormat[ListFormat["AllowTrailingComma"] = 32] = "AllowTrailingComma";
-        // Whitespace
-        ListFormat[ListFormat["Indented"] = 64] = "Indented";
-        ListFormat[ListFormat["SpaceBetweenBraces"] = 128] = "SpaceBetweenBraces";
-        ListFormat[ListFormat["SpaceBetweenSiblings"] = 256] = "SpaceBetweenSiblings";
-        // Brackets/Braces
-        ListFormat[ListFormat["Braces"] = 512] = "Braces";
-        ListFormat[ListFormat["Parenthesis"] = 1024] = "Parenthesis";
-        ListFormat[ListFormat["AngleBrackets"] = 2048] = "AngleBrackets";
-        ListFormat[ListFormat["SquareBrackets"] = 4096] = "SquareBrackets";
-        ListFormat[ListFormat["BracketsMask"] = 7680] = "BracketsMask";
-        ListFormat[ListFormat["OptionalIfUndefined"] = 8192] = "OptionalIfUndefined";
-        ListFormat[ListFormat["OptionalIfEmpty"] = 16384] = "OptionalIfEmpty";
-        ListFormat[ListFormat["Optional"] = 24576] = "Optional";
-        // Other
-        ListFormat[ListFormat["PreferNewLine"] = 32768] = "PreferNewLine";
-        ListFormat[ListFormat["NoTrailingNewLine"] = 65536] = "NoTrailingNewLine";
-        ListFormat[ListFormat["NoInterveningComments"] = 131072] = "NoInterveningComments";
-        ListFormat[ListFormat["NoSpaceIfEmpty"] = 262144] = "NoSpaceIfEmpty";
-        ListFormat[ListFormat["SingleElement"] = 524288] = "SingleElement";
-        // Precomputed Formats
-        ListFormat[ListFormat["Modifiers"] = 131328] = "Modifiers";
-        ListFormat[ListFormat["HeritageClauses"] = 256] = "HeritageClauses";
-        ListFormat[ListFormat["SingleLineTypeLiteralMembers"] = 384] = "SingleLineTypeLiteralMembers";
-        ListFormat[ListFormat["MultiLineTypeLiteralMembers"] = 16449] = "MultiLineTypeLiteralMembers";
-        ListFormat[ListFormat["TupleTypeElements"] = 272] = "TupleTypeElements";
-        ListFormat[ListFormat["UnionTypeConstituents"] = 260] = "UnionTypeConstituents";
-        ListFormat[ListFormat["IntersectionTypeConstituents"] = 264] = "IntersectionTypeConstituents";
-        ListFormat[ListFormat["ObjectBindingPatternElements"] = 262576] = "ObjectBindingPatternElements";
-        ListFormat[ListFormat["ArrayBindingPatternElements"] = 262448] = "ArrayBindingPatternElements";
-        ListFormat[ListFormat["ObjectLiteralExpressionProperties"] = 263122] = "ObjectLiteralExpressionProperties";
-        ListFormat[ListFormat["ArrayLiteralExpressionElements"] = 4466] = "ArrayLiteralExpressionElements";
-        ListFormat[ListFormat["CommaListElements"] = 272] = "CommaListElements";
-        ListFormat[ListFormat["CallExpressionArguments"] = 1296] = "CallExpressionArguments";
-        ListFormat[ListFormat["NewExpressionArguments"] = 9488] = "NewExpressionArguments";
-        ListFormat[ListFormat["TemplateExpressionSpans"] = 131072] = "TemplateExpressionSpans";
-        ListFormat[ListFormat["SingleLineBlockStatements"] = 384] = "SingleLineBlockStatements";
-        ListFormat[ListFormat["MultiLineBlockStatements"] = 65] = "MultiLineBlockStatements";
-        ListFormat[ListFormat["VariableDeclarationList"] = 272] = "VariableDeclarationList";
-        ListFormat[ListFormat["SingleLineFunctionBodyStatements"] = 384] = "SingleLineFunctionBodyStatements";
-        ListFormat[ListFormat["MultiLineFunctionBodyStatements"] = 1] = "MultiLineFunctionBodyStatements";
-        ListFormat[ListFormat["ClassHeritageClauses"] = 0] = "ClassHeritageClauses";
-        ListFormat[ListFormat["ClassMembers"] = 65] = "ClassMembers";
-        ListFormat[ListFormat["InterfaceMembers"] = 65] = "InterfaceMembers";
-        ListFormat[ListFormat["EnumMembers"] = 81] = "EnumMembers";
-        ListFormat[ListFormat["CaseBlockClauses"] = 65] = "CaseBlockClauses";
-        ListFormat[ListFormat["NamedImportsOrExportsElements"] = 262576] = "NamedImportsOrExportsElements";
-        ListFormat[ListFormat["JsxElementOrFragmentChildren"] = 131072] = "JsxElementOrFragmentChildren";
-        ListFormat[ListFormat["JsxElementAttributes"] = 131328] = "JsxElementAttributes";
-        ListFormat[ListFormat["CaseOrDefaultClauseStatements"] = 81985] = "CaseOrDefaultClauseStatements";
-        ListFormat[ListFormat["HeritageClauseTypes"] = 272] = "HeritageClauseTypes";
-        ListFormat[ListFormat["SourceFileStatements"] = 65537] = "SourceFileStatements";
-        ListFormat[ListFormat["Decorators"] = 24577] = "Decorators";
-        ListFormat[ListFormat["TypeArguments"] = 26896] = "TypeArguments";
-        ListFormat[ListFormat["TypeParameters"] = 26896] = "TypeParameters";
-        ListFormat[ListFormat["Parameters"] = 1296] = "Parameters";
-        ListFormat[ListFormat["IndexSignatureParameters"] = 4432] = "IndexSignatureParameters";
-    })(ListFormat = ts.ListFormat || (ts.ListFormat = {}));
-    /* @internal */
-    var PragmaKindFlags;
-    (function (PragmaKindFlags) {
-        PragmaKindFlags[PragmaKindFlags["None"] = 0] = "None";
-        /**
-         * Triple slash comment of the form
-         * /// <pragma-name argname="value" />
-         */
-        PragmaKindFlags[PragmaKindFlags["TripleSlashXML"] = 1] = "TripleSlashXML";
-        /**
-         * Single line comment of the form
-         * // @pragma-name argval1 argval2
-         * or
-         * /// @pragma-name argval1 argval2
-         */
-        PragmaKindFlags[PragmaKindFlags["SingleLine"] = 2] = "SingleLine";
-        /**
-         * Multiline non-jsdoc pragma of the form
-         * /* @pragma-name argval1 argval2 * /
-         */
-        PragmaKindFlags[PragmaKindFlags["MultiLine"] = 4] = "MultiLine";
-        PragmaKindFlags[PragmaKindFlags["All"] = 7] = "All";
-        PragmaKindFlags[PragmaKindFlags["Default"] = 7] = "Default";
-    })(PragmaKindFlags = ts.PragmaKindFlags || (ts.PragmaKindFlags = {}));
-    /**
-     * This function only exists to cause exact types to be inferred for all the literals within `commentPragmas`
-     */
-    /* @internal */
     function _contextuallyTypePragmas(args) {
         return args;
     }
-    // While not strictly a type, this is here because `PragmaMap` needs to be here to be used with `SourceFile`, and we don't
-    //  fancy effectively defining it twice, once in value-space and once in type-space
-    /* @internal */
     ts.commentPragmas = _contextuallyTypePragmas({
         "reference": {
             args: [
@@ -3472,38 +1765,32 @@ var ts;
                 { name: "path", optional: true, captureSpan: true },
                 { name: "no-default-lib", optional: true }
             ],
-            kind: 1 /* TripleSlashXML */
+            kind: 1
         },
         "amd-dependency": {
             args: [{ name: "path" }, { name: "name", optional: true }],
-            kind: 1 /* TripleSlashXML */
+            kind: 1
         },
         "amd-module": {
             args: [{ name: "name" }],
-            kind: 1 /* TripleSlashXML */
+            kind: 1
         },
         "ts-check": {
-            kind: 2 /* SingleLine */
+            kind: 2
         },
         "ts-nocheck": {
-            kind: 2 /* SingleLine */
+            kind: 2
         },
         "jsx": {
             args: [{ name: "factory" }],
-            kind: 4 /* MultiLine */
+            kind: 4
         },
     });
 })(ts || (ts = {}));
 var ts;
 (function (ts) {
-    /**
-     * Set a high stack trace limit to provide more information in case of an error.
-     * Called for command-line and server use cases.
-     * Not called if TypeScript is used as a library.
-     */
-    /* @internal */
     function setStackTraceLimit() {
-        if (Error.stackTraceLimit < 100) { // Also tests that we won't set the property if it doesn't exist.
+        if (Error.stackTraceLimit < 100) {
             Error.stackTraceLimit = 100;
         }
     }
@@ -3514,7 +1801,6 @@ var ts;
         FileWatcherEventKind[FileWatcherEventKind["Changed"] = 1] = "Changed";
         FileWatcherEventKind[FileWatcherEventKind["Deleted"] = 2] = "Deleted";
     })(FileWatcherEventKind = ts.FileWatcherEventKind || (ts.FileWatcherEventKind = {}));
-    /* @internal */
     var PollingInterval;
     (function (PollingInterval) {
         PollingInterval[PollingInterval["High"] = 2000] = "High";
@@ -3530,13 +1816,11 @@ var ts;
         return pollingIntervalsForPriority[watchPriority];
     }
     var pollingIntervalsForPriority = getPriorityValues(250);
-    /* @internal */
     function watchFileUsingPriorityPollingInterval(host, fileName, callback, watchPriority) {
         return host.watchFile(fileName, callback, pollingInterval(watchPriority));
     }
     ts.watchFileUsingPriorityPollingInterval = watchFileUsingPriorityPollingInterval;
-    /* @internal */
-    ts.missingFileModifiedTime = new Date(0); // Any subsequent modification will occur after this time
+    ts.missingFileModifiedTime = new Date(0);
     function createPollingIntervalBasedLevels(levels) {
         var _a;
         return _a = {},
@@ -3547,9 +1831,7 @@ var ts;
     }
     var defaultChunkLevels = { Low: 32, Medium: 64, High: 256 };
     var pollingChunkSize = createPollingIntervalBasedLevels(defaultChunkLevels);
-    /* @internal */
     ts.unchangedPollThresholds = createPollingIntervalBasedLevels(defaultChunkLevels);
-    /* @internal */
     function setCustomPollingValues(system) {
         if (!system.getEnvironmentVariable) {
             return;
@@ -3593,7 +1875,6 @@ var ts;
         }
     }
     ts.setCustomPollingValues = setCustomPollingValues;
-    /* @internal */
     function createDynamicPriorityPollingWatchFile(host) {
         var watchedFiles = [];
         var changedFilesInLastPoll = [];
@@ -3613,9 +1894,7 @@ var ts;
             return {
                 close: function () {
                     file.isClosed = true;
-                    // Remove from watchedFiles
                     ts.unorderedRemoveItem(watchedFiles, file);
-                    // Do not update polling interval queue since that will happen as part of polling
                 }
             };
         }
@@ -3628,7 +1907,6 @@ var ts;
         }
         function pollPollingIntervalQueue(queue) {
             queue.pollIndex = pollQueue(queue, queue.pollingInterval, queue.pollIndex, pollingChunkSize[queue.pollingInterval]);
-            // Set the next polling index and timeout
             if (queue.length) {
                 scheduleNextPoll(queue.pollingInterval);
             }
@@ -3638,18 +1916,13 @@ var ts;
             }
         }
         function pollLowPollingIntervalQueue(queue) {
-            // Always poll complete list of changedFilesInLastPoll
-            pollQueue(changedFilesInLastPoll, PollingInterval.Low, /*pollIndex*/ 0, changedFilesInLastPoll.length);
-            // Finally do the actual polling of the queue
+            pollQueue(changedFilesInLastPoll, PollingInterval.Low, 0, changedFilesInLastPoll.length);
             pollPollingIntervalQueue(queue);
-            // Schedule poll if there are files in changedFilesInLastPoll but no files in the actual queue
-            // as pollPollingIntervalQueue wont schedule for next poll
             if (!queue.pollScheduled && changedFilesInLastPoll.length) {
                 scheduleNextPoll(PollingInterval.Low);
             }
         }
         function pollQueue(queue, pollingInterval, pollIndex, chunkSize) {
-            // Max visit would be all elements of the queue
             var needsVisit = queue.length;
             var definedValueCopyToIndex = pollIndex;
             for (var polled = 0; polled < chunkSize && needsVisit > 0; nextPollIndex(), needsVisit--) {
@@ -3664,12 +1937,10 @@ var ts;
                 polled++;
                 var fileChanged = onWatchedFileStat(watchedFile, getModifiedTime(watchedFile.fileName));
                 if (watchedFile.isClosed) {
-                    // Closed watcher as part of callback
                     queue[pollIndex] = undefined;
                 }
                 else if (fileChanged) {
                     watchedFile.unchangedPolls = 0;
-                    // Changed files go to changedFilesInLastPoll queue
                     if (queue !== changedFilesInLastPoll) {
                         queue[pollIndex] = undefined;
                         addChangedFileToLowPollingIntervalQueue(watchedFile);
@@ -3679,7 +1950,6 @@ var ts;
                     watchedFile.unchangedPolls++;
                 }
                 else if (queue === changedFilesInLastPoll) {
-                    // Restart unchangedPollCount for unchanged file and move to low polling interval queue
                     watchedFile.unchangedPolls = 1;
                     queue[pollIndex] = undefined;
                     addToPollingIntervalQueue(watchedFile, PollingInterval.Low);
@@ -3690,7 +1960,6 @@ var ts;
                     addToPollingIntervalQueue(watchedFile, pollingInterval === PollingInterval.Low ? PollingInterval.Medium : PollingInterval.High);
                 }
                 if (queue[pollIndex]) {
-                    // Copy this file to the non hole location
                     if (definedValueCopyToIndex < pollIndex) {
                         queue[definedValueCopyToIndex] = watchedFile;
                         queue[pollIndex] = undefined;
@@ -3698,13 +1967,11 @@ var ts;
                     definedValueCopyToIndex++;
                 }
             }
-            // Return next poll index
             return pollIndex;
             function nextPollIndex() {
                 pollIndex++;
                 if (pollIndex === queue.length) {
                     if (definedValueCopyToIndex < pollIndex) {
-                        // There are holes from nextDefinedValueIndex to end of queue, change queue size
                         queue.length = definedValueCopyToIndex;
                     }
                     pollIndex = 0;
@@ -3743,10 +2010,6 @@ var ts;
         }
     }
     ts.createDynamicPriorityPollingWatchFile = createDynamicPriorityPollingWatchFile;
-    /**
-     * Returns true if file status changed
-     */
-    /*@internal*/
     function onWatchedFileStat(watchedFile, modifiedTime) {
         var oldTime = watchedFile.mtime.getTime();
         var newTime = modifiedTime.getTime();
@@ -3763,22 +2026,11 @@ var ts;
         return false;
     }
     ts.onWatchedFileStat = onWatchedFileStat;
-    /**
-     * Watch the directory recursively using host provided method to watch child directories
-     * that means if this is recursive watcher, watch the children directories as well
-     * (eg on OS that dont support recursive watch using fs.watch use fs.watchFile)
-     */
-    /*@internal*/
     function createRecursiveDirectoryWatcher(host) {
         return createDirectoryWatcher;
-        /**
-         * Create the directory watcher for the dirPath.
-         */
         function createDirectoryWatcher(dirName, callback) {
             var watcher = host.watchDirectory(dirName, function (fileName) {
-                // Call the actual callback
                 callback(fileName);
-                // Iterate through existing children and update the watches if needed
                 updateChildWatches(result, callback);
             });
             var result = {
@@ -3794,33 +2046,21 @@ var ts;
             return result;
         }
         function updateChildWatches(watcher, callback) {
-            // Iterate through existing children and update the watches if needed
             if (watcher) {
                 watcher.childWatches = watchChildDirectories(watcher.dirName, watcher.childWatches, callback);
             }
         }
-        /**
-         * Watch the directories in the parentDir
-         */
         function watchChildDirectories(parentDir, existingChildWatches, callback) {
             var newChildWatches;
             ts.enumerateInsertsAndDeletes(host.directoryExists(parentDir) ? ts.mapDefined(host.getAccessibleSortedChildDirectories(parentDir), function (child) {
                 var childFullName = ts.getNormalizedAbsolutePath(child, parentDir);
-                // Filter our the symbolic link directories since those arent included in recursive watch
-                // which is same behaviour when recursive: true is passed to fs.watch
-                return host.filePathComparer(childFullName, host.realpath(childFullName)) === 0 /* EqualTo */ ? childFullName : undefined;
+                return host.filePathComparer(childFullName, host.realpath(childFullName)) === 0 ? childFullName : undefined;
             }) : ts.emptyArray, existingChildWatches, function (child, childWatcher) { return host.filePathComparer(child, childWatcher.dirName); }, createAndAddChildDirectoryWatcher, ts.closeFileWatcher, addChildDirectoryWatcher);
             return newChildWatches || ts.emptyArray;
-            /**
-             * Create new childDirectoryWatcher and add it to the new ChildDirectoryWatcher list
-             */
             function createAndAddChildDirectoryWatcher(childName) {
                 var result = createDirectoryWatcher(childName, callback);
                 addChildDirectoryWatcher(result);
             }
-            /**
-             * Add child directory watcher to the new ChildDirectoryWatcher list
-             */
             function addChildDirectoryWatcher(childWatcher) {
                 (newChildWatches || (newChildWatches = [])).push(childWatcher);
             }
@@ -3842,17 +2082,12 @@ var ts;
         return parseInt(version.substring(1, dot));
     }
     ts.getNodeMajorVersion = getNodeMajorVersion;
-    // TODO: this is used as if it's certainly defined in many places.
     ts.sys = (function () {
-        // NodeJS detects "\uFEFF" at the start of the string and *replaces* it with the actual
-        // byte order mark from the specified encoding. Using any other byte order mark does
-        // not actually work.
         var byteOrderMarkIndicator = "\uFEFF";
         function getNodeSystem() {
             var _fs = require("fs");
             var _path = require("path");
             var _os = require("os");
-            // crypto can be absent on reduced node installations
             var _crypto;
             try {
                 _crypto = require("crypto");
@@ -3865,11 +2100,6 @@ var ts;
             var isNode4OrLater = nodeVersion >= 4;
             var platform = _os.platform();
             var useCaseSensitiveFileNames = isFileSystemCaseSensitive();
-            var FileSystemEntryKind;
-            (function (FileSystemEntryKind) {
-                FileSystemEntryKind[FileSystemEntryKind["File"] = 0] = "File";
-                FileSystemEntryKind[FileSystemEntryKind["Directory"] = 1] = "Directory";
-            })(FileSystemEntryKind || (FileSystemEntryKind = {}));
             var useNonPollingWatchers = process.env.TSC_NONPOLLING_WATCHER;
             var tscWatchFile = process.env.TSC_WATCHFILE;
             var tscWatchDirectory = process.env.TSC_WATCHDIRECTORY;
@@ -3925,7 +2155,7 @@ var ts;
                             return stat.size;
                         }
                     }
-                    catch ( /*ignore*/_a) { /*ignore*/ }
+                    catch (_a) { }
                     return 0;
                 },
                 exit: function (exitCode) {
@@ -3938,7 +2168,6 @@ var ts;
                         require("source-map-support").install();
                     }
                     catch (_a) {
-                        // Could not enable source maps.
                     }
                 },
                 setTimeout: setTimeout,
@@ -3964,14 +2193,11 @@ var ts;
             };
             return nodeSystem;
             function isFileSystemCaseSensitive() {
-                // win32\win64 are case insensitive platforms
                 if (platform === "win32" || platform === "win64") {
                     return false;
                 }
-                // If this file exists under a different case, we must be case-insensitve.
                 return !fileExists(swapCase(__filename));
             }
-            /** Convert all lowercase chars to uppercase, and vice-versa */
             function swapCase(s) {
                 return s.replace(/\w/g, function (ch) {
                     var up = ch.toUpperCase();
@@ -3981,30 +2207,22 @@ var ts;
             function getWatchFile() {
                 switch (tscWatchFile) {
                     case "PriorityPollingInterval":
-                        // Use polling interval based on priority when create watch using host.watchFile
                         return fsWatchFile;
                     case "DynamicPriorityPolling":
-                        // Use polling interval but change the interval depending on file changes and their default polling interval
                         return createDynamicPriorityPollingWatchFile({ getModifiedTime: getModifiedTime, setTimeout: setTimeout });
                     case "UseFsEvents":
-                        // Use notifications from FS to watch with falling back to fs.watchFile
                         return watchFileUsingFsWatch;
                     case "UseFsEventsWithFallbackDynamicPolling":
-                        // Use notifications from FS to watch with falling back to dynamic watch file
                         dynamicPollingWatchFile = createDynamicPriorityPollingWatchFile({ getModifiedTime: getModifiedTime, setTimeout: setTimeout });
                         return createWatchFileUsingDynamicWatchFile(dynamicPollingWatchFile);
                     case "UseFsEventsOnParentDirectory":
-                        // Use notifications from FS to watch with falling back to fs.watchFile
                         return createNonPollingWatchFile();
                 }
                 return useNonPollingWatchers ?
                     createNonPollingWatchFile() :
-                    // Default to do not use polling interval as it is before this experiment branch
                     function (fileName, callback) { return fsWatchFile(fileName, callback); };
             }
             function getWatchDirectory() {
-                // Node 4.0 `fs.watch` function supports the "recursive" option on both OSX and Windows
-                // (ref: https://github.com/nodejs/node/pull/2649 and https://github.com/Microsoft/TypeScript/issues/4643)
                 var fsSupportsRecursive = isNode4OrLater && (process.platform === "win32" || process.platform === "darwin");
                 if (fsSupportsRecursive) {
                     return watchDirectoryUsingFsWatch;
@@ -4026,11 +2244,10 @@ var ts;
                         return watchDirectoryRecursively(directoryName, callback);
                     }
                     watchDirectory(directoryName, callback);
-                    return undefined; // TODO: GH#18217
+                    return undefined;
                 };
             }
             function createNonPollingWatchFile() {
-                // One file can have multiple watchers
                 var fileWatcherCallbacks = ts.createMultiMap();
                 var dirWatchers = ts.createMap();
                 var toCanonicalName = ts.createGetCanonicalFileName(useCaseSensitiveFileNames);
@@ -4056,11 +2273,9 @@ var ts;
                 }
                 function createDirectoryWatcher(dirName, dirPath) {
                     var watcher = fsWatchDirectory(dirName, function (_eventName, relativeFileName) {
-                        // When files are deleted from disk, the triggered "rename" event would have a relativefileName of "undefined"
                         var fileName = !ts.isString(relativeFileName)
-                            ? undefined // TODO: GH#18217
+                            ? undefined
                             : ts.getNormalizedAbsolutePath(relativeFileName, dirName);
-                        // Some applications save a working file via rename operations
                         var callbacks = fileWatcherCallbacks.get(toCanonicalName(fileName));
                         if (callbacks) {
                             for (var _i = 0, callbacks_1 = callbacks; _i < callbacks_1.length; _i++) {
@@ -4081,12 +2296,9 @@ var ts;
                     close: function () { return _fs.unwatchFile(fileName, fileChanged); }
                 };
                 function fileChanged(curr, prev) {
-                    // previous event kind check is to ensure we recongnize the file as previously also missing when it is restored or renamed twice (that is it disappears and reappears)
-                    // In such case, prevTime returned is same as prev time of event when file was deleted as per node documentation
                     var isPreviouslyDeleted = +prev.mtime === 0 || eventKind === FileWatcherEventKind.Deleted;
                     if (+curr.mtime === 0) {
                         if (isPreviouslyDeleted) {
-                            // Already deleted file, no need to callback again
                             return;
                         }
                         eventKind = FileWatcherEventKind.Deleted;
@@ -4094,12 +2306,10 @@ var ts;
                     else if (isPreviouslyDeleted) {
                         eventKind = FileWatcherEventKind.Created;
                     }
-                    // If there is no change in modified time, ignore the event
                     else if (+curr.mtime === +prev.mtime) {
                         return;
                     }
                     else {
-                        // File changed
                         eventKind = FileWatcherEventKind.Changed;
                     }
                     callback(fileName, eventKind);
@@ -4114,55 +2324,36 @@ var ts;
                         callback(fileName, fileExists(fileName) ? FileWatcherEventKind.Created : FileWatcherEventKind.Deleted);
                     }
                     else {
-                        // Change
                         callback(fileName, FileWatcherEventKind.Changed);
                     }
                 };
             }
             function createFsWatchCallbackForDirectoryWatcherCallback(directoryName, callback) {
                 return function (eventName, relativeFileName) {
-                    // In watchDirectory we only care about adding and removing files (when event name is
-                    // "rename"); changes made within files are handled by corresponding fileWatchers (when
-                    // event name is "change")
                     if (eventName === "rename") {
-                        // When deleting a file, the passed baseFileName is null
                         callback(!relativeFileName ? directoryName : ts.normalizePath(ts.combinePaths(directoryName, relativeFileName)));
                     }
                 };
             }
             function fsWatch(fileOrDirectory, entryKind, callback, recursive, fallbackPollingWatchFile, pollingInterval) {
                 var options;
-                /** Watcher for the file system entry depending on whether it is missing or present */
                 var watcher = !fileSystemEntryExists(fileOrDirectory, entryKind) ?
                     watchMissingFileSystemEntry() :
                     watchPresentFileSystemEntry();
                 return {
                     close: function () {
-                        // Close the watcher (either existing file system entry watcher or missing file system entry watcher)
                         watcher.close();
                         watcher = undefined;
                     }
                 };
-                /**
-                 * Invoke the callback with rename and update the watcher if not closed
-                 * @param createWatcher
-                 */
                 function invokeCallbackAndUpdateWatcher(createWatcher) {
-                    // Call the callback for current directory
                     callback("rename", "");
-                    // If watcher is not closed, update it
                     if (watcher) {
                         watcher.close();
                         watcher = createWatcher();
                     }
                 }
-                /**
-                 * Watch the file or directory that is currently present
-                 * and when the watched file or directory is deleted, switch to missing file system entry watcher
-                 */
                 function watchPresentFileSystemEntry() {
-                    // Node 4.0 `fs.watch` function supports the "recursive" option on both OSX and Windows
-                    // (ref: https://github.com/nodejs/node/pull/2649 and https://github.com/Microsoft/TypeScript/issues/4643)
                     if (options === undefined) {
                         if (isNode4OrLater && (process.platform === "win32" || process.platform === "darwin")) {
                             options = { persistent: true, recursive: !!recursive };
@@ -4173,47 +2364,32 @@ var ts;
                     }
                     try {
                         var presentWatcher = _fs.watch(fileOrDirectory, options, callback);
-                        // Watch the missing file or directory or error
                         presentWatcher.on("error", function () { return invokeCallbackAndUpdateWatcher(watchMissingFileSystemEntry); });
                         return presentWatcher;
                     }
                     catch (e) {
-                        // Catch the exception and use polling instead
-                        // Eg. on linux the number of watches are limited and one could easily exhaust watches and the exception ENOSPC is thrown when creating watcher at that point
-                        // so instead of throwing error, use fs.watchFile
                         return watchPresentFileSystemEntryWithFsWatchFile();
                     }
                 }
-                /**
-                 * Watch the file or directory using fs.watchFile since fs.watch threw exception
-                 * Eg. on linux the number of watches are limited and one could easily exhaust watches and the exception ENOSPC is thrown when creating watcher at that point
-                 */
                 function watchPresentFileSystemEntryWithFsWatchFile() {
                     return fallbackPollingWatchFile(fileOrDirectory, createFileWatcherCallback(callback), pollingInterval);
                 }
-                /**
-                 * Watch the file or directory that is missing
-                 * and switch to existing file or directory when the missing filesystem entry is created
-                 */
                 function watchMissingFileSystemEntry() {
                     return fallbackPollingWatchFile(fileOrDirectory, function (_fileName, eventKind) {
                         if (eventKind === FileWatcherEventKind.Created && fileSystemEntryExists(fileOrDirectory, entryKind)) {
-                            // Call the callback for current file or directory
-                            // For now it could be callback for the inner directory creation,
-                            // but just return current directory, better than current no-op
                             invokeCallbackAndUpdateWatcher(watchPresentFileSystemEntry);
                         }
                     }, pollingInterval);
                 }
             }
             function watchFileUsingFsWatch(fileName, callback, pollingInterval) {
-                return fsWatch(fileName, 0 /* File */, createFsWatchCallbackForFileWatcherCallback(fileName, callback), /*recursive*/ false, fsWatchFile, pollingInterval);
+                return fsWatch(fileName, 0, createFsWatchCallbackForFileWatcherCallback(fileName, callback), false, fsWatchFile, pollingInterval);
             }
             function createWatchFileUsingDynamicWatchFile(watchFile) {
-                return function (fileName, callback, pollingInterval) { return fsWatch(fileName, 0 /* File */, createFsWatchCallbackForFileWatcherCallback(fileName, callback), /*recursive*/ false, watchFile, pollingInterval); };
+                return function (fileName, callback, pollingInterval) { return fsWatch(fileName, 0, createFsWatchCallbackForFileWatcherCallback(fileName, callback), false, watchFile, pollingInterval); };
             }
             function fsWatchDirectory(directoryName, callback, recursive) {
-                return fsWatch(directoryName, 1 /* Directory */, callback, !!recursive, fsWatchFile);
+                return fsWatch(directoryName, 1, callback, !!recursive, fsWatchFile);
             }
             function watchDirectoryUsingFsWatch(directoryName, callback, recursive) {
                 return fsWatchDirectory(directoryName, createFsWatchCallbackForDirectoryWatcherCallback(directoryName, callback), recursive);
@@ -4228,9 +2404,7 @@ var ts;
                 var buffer = _fs.readFileSync(fileName);
                 var len = buffer.length;
                 if (len >= 2 && buffer[0] === 0xFE && buffer[1] === 0xFF) {
-                    // Big endian UTF-16 byte order mark detected. Since big endian is not supported by node.js,
-                    // flip all byte pairs and treat as little endian.
-                    len &= ~1; // Round down to a multiple of 2
+                    len &= ~1;
                     for (var i = 0; i < len; i += 2) {
                         var temp = buffer[i];
                         buffer[i] = buffer[i + 1];
@@ -4239,25 +2413,21 @@ var ts;
                     return buffer.toString("utf16le", 2);
                 }
                 if (len >= 2 && buffer[0] === 0xFF && buffer[1] === 0xFE) {
-                    // Little endian UTF-16 byte order mark detected
                     return buffer.toString("utf16le", 2);
                 }
                 if (len >= 3 && buffer[0] === 0xEF && buffer[1] === 0xBB && buffer[2] === 0xBF) {
-                    // UTF-8 byte order mark detected
                     return buffer.toString("utf8", 3);
                 }
-                // Default is UTF-8 with no byte order mark
                 return buffer.toString("utf8");
             }
             function writeFile(fileName, data, writeByteOrderMark) {
-                // If a BOM is required, emit one
                 if (writeByteOrderMark) {
                     data = byteOrderMarkIndicator + data;
                 }
                 var fd;
                 try {
                     fd = _fs.openSync(fileName, "w");
-                    _fs.writeSync(fd, data, /*position*/ undefined, "utf8");
+                    _fs.writeSync(fd, data, undefined, "utf8");
                 }
                 finally {
                     if (fd !== undefined) {
@@ -4270,10 +2440,8 @@ var ts;
                     var entries = _fs.readdirSync(path || ".").sort();
                     var files = [];
                     var directories = [];
-                    for (var _i = 0, entries_1 = entries; _i < entries_1.length; _i++) {
-                        var entry = entries_1[_i];
-                        // This is necessary because on some file system node fails to exclude
-                        // "." and "..". See https://github.com/nodejs/node/issues/4002
+                    for (var _i = 0, entries_2 = entries; _i < entries_2.length; _i++) {
+                        var entry = entries_2[_i];
                         if (entry === "." || entry === "..") {
                             continue;
                         }
@@ -4305,8 +2473,8 @@ var ts;
                 try {
                     var stat = _fs.statSync(path);
                     switch (entryKind) {
-                        case 0 /* File */: return stat.isFile();
-                        case 1 /* Directory */: return stat.isDirectory();
+                        case 0: return stat.isFile();
+                        case 1: return stat.isDirectory();
                         default: return false;
                     }
                 }
@@ -4315,13 +2483,13 @@ var ts;
                 }
             }
             function fileExists(path) {
-                return fileSystemEntryExists(path, 0 /* File */);
+                return fileSystemEntryExists(path, 0);
             }
             function directoryExists(path) {
-                return fileSystemEntryExists(path, 1 /* Directory */);
+                return fileSystemEntryExists(path, 1);
             }
             function getDirectories(path) {
-                return ts.filter(_fs.readdirSync(path), function (dir) { return fileSystemEntryExists(ts.combinePaths(path, dir), 1 /* Directory */); });
+                return ts.filter(_fs.readdirSync(path), function (dir) { return fileSystemEntryExists(ts.combinePaths(path, dir), 1); });
             }
             function realpath(path) {
                 try {
@@ -4355,10 +2523,6 @@ var ts;
                     return;
                 }
             }
-            /**
-             * djb2 hashing algorithm
-             * http://www.cse.yorku.ca/~oz/hash.html
-             */
             function generateDjb2Hash(data) {
                 var chars = data.split("").map(function (str) { return str.charCodeAt(0); });
                 return "" + chars.reduce(function (prev, curr) { return ((prev << 5) + prev) + curr; }, 5381);
@@ -4382,11 +2546,9 @@ var ts;
                 useCaseSensitiveFileNames: !!ChakraHost.useCaseSensitiveFileNames,
                 write: ChakraHost.echo,
                 readFile: function (path, _encoding) {
-                    // encoding is automatically handled by the implementation in ChakraHost
                     return ChakraHost.readFile(path);
                 },
                 writeFile: function (path, data, writeByteOrderMark) {
-                    // If a BOM is required, emit one
                     if (writeByteOrderMark) {
                         data = byteOrderMarkIndicator + data;
                     }
@@ -4423,12 +2585,9 @@ var ts;
             sys = getChakraSystem();
         }
         else if (typeof process !== "undefined" && process.nextTick && !process.browser && typeof require !== "undefined") {
-            // process and process.nextTick checks if current environment is node-like
-            // process.browser check excludes webpack and browserify
             sys = getNodeSystem();
         }
         if (sys) {
-            // patch writefile to create folder before writing the file
             var originalWriteFile_1 = sys.writeFile;
             sys.writeFile = function (path, data, writeBom) {
                 var directoryPath = ts.getDirectoryPath(ts.normalizeSlashes(path));
@@ -4443,22 +2602,18 @@ var ts;
     if (ts.sys && ts.sys.getEnvironmentVariable) {
         setCustomPollingValues(ts.sys);
         ts.Debug.currentAssertionLevel = /^development$/i.test(ts.sys.getEnvironmentVariable("NODE_ENV"))
-            ? 1 /* Normal */
-            : 0 /* None */;
+            ? 1
+            : 0;
     }
     if (ts.sys && ts.sys.debugMode) {
         ts.Debug.isDebugging = true;
     }
 })(ts || (ts = {}));
-// <auto-generated />
-// generated from './diagnosticInformationMap.generated.ts' by 'src\parser'
-/* @internal */
 var ts;
 (function (ts) {
     function diag(code, category, key, message, reportsUnnecessary) {
         return { code: code, category: category, key: key, message: message, reportsUnnecessary: reportsUnnecessary };
     }
-    // tslint:disable-next-line variable-name
     ts.Diagnostics = {
         Unterminated_string_literal: diag(1002, ts.DiagnosticCategory.Error, "Unterminated_string_literal_1002", "Unterminated string literal."),
         Identifier_expected: diag(1003, ts.DiagnosticCategory.Error, "Identifier_expected_1003", "Identifier expected."),
@@ -5021,7 +3176,7 @@ var ts;
         _0_is_a_primitive_but_1_is_a_wrapper_object_Prefer_using_0_when_possible: diag(2692, ts.DiagnosticCategory.Error, "_0_is_a_primitive_but_1_is_a_wrapper_object_Prefer_using_0_when_possible_2692", "'{0}' is a primitive, but '{1}' is a wrapper object. Prefer using '{0}' when possible."),
         _0_only_refers_to_a_type_but_is_being_used_as_a_value_here: diag(2693, ts.DiagnosticCategory.Error, "_0_only_refers_to_a_type_but_is_being_used_as_a_value_here_2693", "'{0}' only refers to a type, but is being used as a value here."),
         Namespace_0_has_no_exported_member_1: diag(2694, ts.DiagnosticCategory.Error, "Namespace_0_has_no_exported_member_1_2694", "Namespace '{0}' has no exported member '{1}'."),
-        Left_side_of_comma_operator_is_unused_and_has_no_side_effects: diag(2695, ts.DiagnosticCategory.Error, "Left_side_of_comma_operator_is_unused_and_has_no_side_effects_2695", "Left side of comma operator is unused and has no side effects.", /*reportsUnnecessary*/ true),
+        Left_side_of_comma_operator_is_unused_and_has_no_side_effects: diag(2695, ts.DiagnosticCategory.Error, "Left_side_of_comma_operator_is_unused_and_has_no_side_effects_2695", "Left side of comma operator is unused and has no side effects.", true),
         The_Object_type_is_assignable_to_very_few_other_types_Did_you_mean_to_use_the_any_type_instead: diag(2696, ts.DiagnosticCategory.Error, "The_Object_type_is_assignable_to_very_few_other_types_Did_you_mean_to_use_the_any_type_instead_2696", "The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?"),
         An_async_function_or_method_must_return_a_Promise_Make_sure_you_have_a_declaration_for_Promise_or_include_ES2015_in_your_lib_option: diag(2697, ts.DiagnosticCategory.Error, "An_async_function_or_method_must_return_a_Promise_Make_sure_you_have_a_declaration_for_Promise_or_in_2697", "An async function or method must return a 'Promise'. Make sure you have a declaration for 'Promise' or include 'ES2015' in your `--lib` option."),
         Spread_types_may_only_be_created_from_object_types: diag(2698, ts.DiagnosticCategory.Error, "Spread_types_may_only_be_created_from_object_types_2698", "Spread types may only be created from object types."),
@@ -5287,12 +3442,12 @@ var ts;
         Resolving_real_path_for_0_result_1: diag(6130, ts.DiagnosticCategory.Message, "Resolving_real_path_for_0_result_1_6130", "Resolving real path for '{0}', result '{1}'."),
         Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system: diag(6131, ts.DiagnosticCategory.Error, "Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system_6131", "Cannot compile modules using option '{0}' unless the '--module' flag is 'amd' or 'system'."),
         File_name_0_has_a_1_extension_stripping_it: diag(6132, ts.DiagnosticCategory.Message, "File_name_0_has_a_1_extension_stripping_it_6132", "File name '{0}' has a '{1}' extension - stripping it."),
-        _0_is_declared_but_its_value_is_never_read: diag(6133, ts.DiagnosticCategory.Error, "_0_is_declared_but_its_value_is_never_read_6133", "'{0}' is declared but its value is never read.", /*reportsUnnecessary*/ true),
+        _0_is_declared_but_its_value_is_never_read: diag(6133, ts.DiagnosticCategory.Error, "_0_is_declared_but_its_value_is_never_read_6133", "'{0}' is declared but its value is never read.", true),
         Report_errors_on_unused_locals: diag(6134, ts.DiagnosticCategory.Message, "Report_errors_on_unused_locals_6134", "Report errors on unused locals."),
         Report_errors_on_unused_parameters: diag(6135, ts.DiagnosticCategory.Message, "Report_errors_on_unused_parameters_6135", "Report errors on unused parameters."),
         The_maximum_dependency_depth_to_search_under_node_modules_and_load_JavaScript_files: diag(6136, ts.DiagnosticCategory.Message, "The_maximum_dependency_depth_to_search_under_node_modules_and_load_JavaScript_files_6136", "The maximum dependency depth to search under node_modules and load JavaScript files."),
         Cannot_import_type_declaration_files_Consider_importing_0_instead_of_1: diag(6137, ts.DiagnosticCategory.Error, "Cannot_import_type_declaration_files_Consider_importing_0_instead_of_1_6137", "Cannot import type declaration files. Consider importing '{0}' instead of '{1}'."),
-        Property_0_is_declared_but_its_value_is_never_read: diag(6138, ts.DiagnosticCategory.Error, "Property_0_is_declared_but_its_value_is_never_read_6138", "Property '{0}' is declared but its value is never read.", /*reportsUnnecessary*/ true),
+        Property_0_is_declared_but_its_value_is_never_read: diag(6138, ts.DiagnosticCategory.Error, "Property_0_is_declared_but_its_value_is_never_read_6138", "Property '{0}' is declared but its value is never read.", true),
         Import_emit_helpers_from_tslib: diag(6139, ts.DiagnosticCategory.Message, "Import_emit_helpers_from_tslib_6139", "Import emit helpers from 'tslib'."),
         Auto_discovery_for_typings_is_enabled_in_project_0_Running_extra_resolution_pass_for_module_1_using_cache_location_2: diag(6140, ts.DiagnosticCategory.Error, "Auto_discovery_for_typings_is_enabled_in_project_0_Running_extra_resolution_pass_for_module_1_using__6140", "Auto discovery for typings is enabled in project '{0}'. Running extra resolution pass for module '{1}' using cache location '{2}'."),
         Parse_in_strict_mode_and_emit_use_strict_for_each_source_file: diag(6141, ts.DiagnosticCategory.Message, "Parse_in_strict_mode_and_emit_use_strict_for_each_source_file_6141", "Parse in strict mode and emit \"use strict\" for each source file."),
@@ -5345,14 +3500,14 @@ var ts;
         Multiple_consecutive_numeric_separators_are_not_permitted: diag(6189, ts.DiagnosticCategory.Error, "Multiple_consecutive_numeric_separators_are_not_permitted_6189", "Multiple consecutive numeric separators are not permitted."),
         Found_package_json_at_0_Package_ID_is_1: diag(6190, ts.DiagnosticCategory.Message, "Found_package_json_at_0_Package_ID_is_1_6190", "Found 'package.json' at '{0}'. Package ID is '{1}'."),
         Whether_to_keep_outdated_console_output_in_watch_mode_instead_of_clearing_the_screen: diag(6191, ts.DiagnosticCategory.Message, "Whether_to_keep_outdated_console_output_in_watch_mode_instead_of_clearing_the_screen_6191", "Whether to keep outdated console output in watch mode instead of clearing the screen."),
-        All_imports_in_import_declaration_are_unused: diag(6192, ts.DiagnosticCategory.Error, "All_imports_in_import_declaration_are_unused_6192", "All imports in import declaration are unused.", /*reportsUnnecessary*/ true),
+        All_imports_in_import_declaration_are_unused: diag(6192, ts.DiagnosticCategory.Error, "All_imports_in_import_declaration_are_unused_6192", "All imports in import declaration are unused.", true),
         Found_1_error_Watching_for_file_changes: diag(6193, ts.DiagnosticCategory.Message, "Found_1_error_Watching_for_file_changes_6193", "Found 1 error. Watching for file changes."),
         Found_0_errors_Watching_for_file_changes: diag(6194, ts.DiagnosticCategory.Message, "Found_0_errors_Watching_for_file_changes_6194", "Found {0} errors. Watching for file changes."),
         Resolve_keyof_to_string_valued_property_names_only_no_numbers_or_symbols: diag(6195, ts.DiagnosticCategory.Message, "Resolve_keyof_to_string_valued_property_names_only_no_numbers_or_symbols_6195", "Resolve 'keyof' to string valued property names only (no numbers or symbols)."),
-        _0_is_declared_but_never_used: diag(6196, ts.DiagnosticCategory.Error, "_0_is_declared_but_never_used_6196", "'{0}' is declared but never used.", /*reportsUnnecessary*/ true),
+        _0_is_declared_but_never_used: diag(6196, ts.DiagnosticCategory.Error, "_0_is_declared_but_never_used_6196", "'{0}' is declared but never used.", true),
         Include_modules_imported_with_json_extension: diag(6197, ts.DiagnosticCategory.Message, "Include_modules_imported_with_json_extension_6197", "Include modules imported with '.json' extension"),
-        All_destructured_elements_are_unused: diag(6198, ts.DiagnosticCategory.Error, "All_destructured_elements_are_unused_6198", "All destructured elements are unused.", /*reportsUnnecessary*/ true),
-        All_variables_are_unused: diag(6199, ts.DiagnosticCategory.Error, "All_variables_are_unused_6199", "All variables are unused.", /*reportsUnnecessary*/ true),
+        All_destructured_elements_are_unused: diag(6198, ts.DiagnosticCategory.Error, "All_destructured_elements_are_unused_6198", "All destructured elements are unused.", true),
+        All_variables_are_unused: diag(6199, ts.DiagnosticCategory.Error, "All_variables_are_unused_6199", "All variables are unused.", true),
         Projects_to_reference: diag(6300, ts.DiagnosticCategory.Message, "Projects_to_reference_6300", "Projects to reference"),
         Enable_project_compilation: diag(6302, ts.DiagnosticCategory.Message, "Enable_project_compilation_6302", "Enable project compilation"),
         Project_references_may_not_form_a_circular_graph_Cycle_detected_Colon_0: diag(6202, ts.DiagnosticCategory.Error, "Project_references_may_not_form_a_circular_graph_Cycle_detected_Colon_0_6202", "Project references may not form a circular graph. Cycle detected: {0}"),
@@ -5402,8 +3557,8 @@ var ts;
         Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions: diag(7024, ts.DiagnosticCategory.Error, "Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_ref_7024", "Function implicitly has return type 'any' because it does not have a return type annotation and is referenced directly or indirectly in one of its return expressions."),
         Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_type: diag(7025, ts.DiagnosticCategory.Error, "Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_typ_7025", "Generator implicitly has type '{0}' because it does not yield any values. Consider supplying a return type."),
         JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists: diag(7026, ts.DiagnosticCategory.Error, "JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists_7026", "JSX element implicitly has type 'any' because no interface 'JSX.{0}' exists."),
-        Unreachable_code_detected: diag(7027, ts.DiagnosticCategory.Error, "Unreachable_code_detected_7027", "Unreachable code detected.", /*reportsUnnecessary*/ true),
-        Unused_label: diag(7028, ts.DiagnosticCategory.Error, "Unused_label_7028", "Unused label.", /*reportsUnnecessary*/ true),
+        Unreachable_code_detected: diag(7027, ts.DiagnosticCategory.Error, "Unreachable_code_detected_7027", "Unreachable code detected.", true),
+        Unused_label: diag(7028, ts.DiagnosticCategory.Error, "Unused_label_7028", "Unused label.", true),
         Fallthrough_case_in_switch: diag(7029, ts.DiagnosticCategory.Error, "Fallthrough_case_in_switch_7029", "Fallthrough case in switch."),
         Not_all_code_paths_return_a_value: diag(7030, ts.DiagnosticCategory.Error, "Not_all_code_paths_return_a_value_7030", "Not all code paths return a value."),
         Binding_element_0_implicitly_has_an_1_type: diag(7031, ts.DiagnosticCategory.Error, "Binding_element_0_implicitly_has_an_1_type_7031", "Binding element '{0}' implicitly has an '{1}' type."),
@@ -5563,204 +3718,157 @@ var ts;
 })(ts || (ts = {}));
 var ts;
 (function (ts) {
-    /* @internal */
     function tokenIsIdentifierOrKeyword(token) {
-        return token >= 71 /* Identifier */;
+        return token >= 71;
     }
     ts.tokenIsIdentifierOrKeyword = tokenIsIdentifierOrKeyword;
-    /* @internal */
     function tokenIsIdentifierOrKeywordOrGreaterThan(token) {
-        return token === 29 /* GreaterThanToken */ || tokenIsIdentifierOrKeyword(token);
+        return token === 29 || tokenIsIdentifierOrKeyword(token);
     }
     ts.tokenIsIdentifierOrKeywordOrGreaterThan = tokenIsIdentifierOrKeywordOrGreaterThan;
     var textToToken = ts.createMapFromTemplate({
-        "abstract": 117 /* AbstractKeyword */,
-        "any": 119 /* AnyKeyword */,
-        "as": 118 /* AsKeyword */,
-        "boolean": 122 /* BooleanKeyword */,
-        "break": 72 /* BreakKeyword */,
-        "case": 73 /* CaseKeyword */,
-        "catch": 74 /* CatchKeyword */,
-        "class": 75 /* ClassKeyword */,
-        "continue": 77 /* ContinueKeyword */,
-        "const": 76 /* ConstKeyword */,
-        "constructor": 123 /* ConstructorKeyword */,
-        "debugger": 78 /* DebuggerKeyword */,
-        "declare": 124 /* DeclareKeyword */,
-        "default": 79 /* DefaultKeyword */,
-        "delete": 80 /* DeleteKeyword */,
-        "do": 81 /* DoKeyword */,
-        "else": 82 /* ElseKeyword */,
-        "enum": 83 /* EnumKeyword */,
-        "export": 84 /* ExportKeyword */,
-        "extends": 85 /* ExtendsKeyword */,
-        "false": 86 /* FalseKeyword */,
-        "finally": 87 /* FinallyKeyword */,
-        "for": 88 /* ForKeyword */,
-        "from": 143 /* FromKeyword */,
-        "function": 89 /* FunctionKeyword */,
-        "get": 125 /* GetKeyword */,
-        "if": 90 /* IfKeyword */,
-        "implements": 108 /* ImplementsKeyword */,
-        "import": 91 /* ImportKeyword */,
-        "in": 92 /* InKeyword */,
-        "infer": 126 /* InferKeyword */,
-        "instanceof": 93 /* InstanceOfKeyword */,
-        "interface": 109 /* InterfaceKeyword */,
-        "is": 127 /* IsKeyword */,
-        "keyof": 128 /* KeyOfKeyword */,
-        "let": 110 /* LetKeyword */,
-        "module": 129 /* ModuleKeyword */,
-        "namespace": 130 /* NamespaceKeyword */,
-        "never": 131 /* NeverKeyword */,
-        "new": 94 /* NewKeyword */,
-        "null": 95 /* NullKeyword */,
-        "number": 134 /* NumberKeyword */,
-        "object": 135 /* ObjectKeyword */,
-        "package": 111 /* PackageKeyword */,
-        "private": 112 /* PrivateKeyword */,
-        "protected": 113 /* ProtectedKeyword */,
-        "public": 114 /* PublicKeyword */,
-        "readonly": 132 /* ReadonlyKeyword */,
-        "require": 133 /* RequireKeyword */,
-        "global": 144 /* GlobalKeyword */,
-        "return": 96 /* ReturnKeyword */,
-        "set": 136 /* SetKeyword */,
-        "static": 115 /* StaticKeyword */,
-        "string": 137 /* StringKeyword */,
-        "super": 97 /* SuperKeyword */,
-        "switch": 98 /* SwitchKeyword */,
-        "symbol": 138 /* SymbolKeyword */,
-        "this": 99 /* ThisKeyword */,
-        "throw": 100 /* ThrowKeyword */,
-        "true": 101 /* TrueKeyword */,
-        "try": 102 /* TryKeyword */,
-        "type": 139 /* TypeKeyword */,
-        "typeof": 103 /* TypeOfKeyword */,
-        "undefined": 140 /* UndefinedKeyword */,
-        "unique": 141 /* UniqueKeyword */,
-        "unknown": 142 /* UnknownKeyword */,
-        "var": 104 /* VarKeyword */,
-        "void": 105 /* VoidKeyword */,
-        "while": 106 /* WhileKeyword */,
-        "with": 107 /* WithKeyword */,
-        "yield": 116 /* YieldKeyword */,
-        "async": 120 /* AsyncKeyword */,
-        "await": 121 /* AwaitKeyword */,
-        "of": 145 /* OfKeyword */,
-        "{": 17 /* OpenBraceToken */,
-        "}": 18 /* CloseBraceToken */,
-        "(": 19 /* OpenParenToken */,
-        ")": 20 /* CloseParenToken */,
-        "[": 21 /* OpenBracketToken */,
-        "]": 22 /* CloseBracketToken */,
-        ".": 23 /* DotToken */,
-        "...": 24 /* DotDotDotToken */,
-        ";": 25 /* SemicolonToken */,
-        ",": 26 /* CommaToken */,
-        "<": 27 /* LessThanToken */,
-        ">": 29 /* GreaterThanToken */,
-        "<=": 30 /* LessThanEqualsToken */,
-        ">=": 31 /* GreaterThanEqualsToken */,
-        "==": 32 /* EqualsEqualsToken */,
-        "!=": 33 /* ExclamationEqualsToken */,
-        "===": 34 /* EqualsEqualsEqualsToken */,
-        "!==": 35 /* ExclamationEqualsEqualsToken */,
-        "=>": 36 /* EqualsGreaterThanToken */,
-        "+": 37 /* PlusToken */,
-        "-": 38 /* MinusToken */,
-        "**": 40 /* AsteriskAsteriskToken */,
-        "*": 39 /* AsteriskToken */,
-        "/": 41 /* SlashToken */,
-        "%": 42 /* PercentToken */,
-        "++": 43 /* PlusPlusToken */,
-        "--": 44 /* MinusMinusToken */,
-        "<<": 45 /* LessThanLessThanToken */,
-        "</": 28 /* LessThanSlashToken */,
-        ">>": 46 /* GreaterThanGreaterThanToken */,
-        ">>>": 47 /* GreaterThanGreaterThanGreaterThanToken */,
-        "&": 48 /* AmpersandToken */,
-        "|": 49 /* BarToken */,
-        "^": 50 /* CaretToken */,
-        "!": 51 /* ExclamationToken */,
-        "~": 52 /* TildeToken */,
-        "&&": 53 /* AmpersandAmpersandToken */,
-        "||": 54 /* BarBarToken */,
-        "?": 55 /* QuestionToken */,
-        ":": 56 /* ColonToken */,
-        "=": 58 /* EqualsToken */,
-        "+=": 59 /* PlusEqualsToken */,
-        "-=": 60 /* MinusEqualsToken */,
-        "*=": 61 /* AsteriskEqualsToken */,
-        "**=": 62 /* AsteriskAsteriskEqualsToken */,
-        "/=": 63 /* SlashEqualsToken */,
-        "%=": 64 /* PercentEqualsToken */,
-        "<<=": 65 /* LessThanLessThanEqualsToken */,
-        ">>=": 66 /* GreaterThanGreaterThanEqualsToken */,
-        ">>>=": 67 /* GreaterThanGreaterThanGreaterThanEqualsToken */,
-        "&=": 68 /* AmpersandEqualsToken */,
-        "|=": 69 /* BarEqualsToken */,
-        "^=": 70 /* CaretEqualsToken */,
-        "@": 57 /* AtToken */,
+        "abstract": 117,
+        "any": 119,
+        "as": 118,
+        "boolean": 122,
+        "break": 72,
+        "case": 73,
+        "catch": 74,
+        "class": 75,
+        "continue": 77,
+        "const": 76,
+        "constructor": 123,
+        "debugger": 78,
+        "declare": 124,
+        "default": 79,
+        "delete": 80,
+        "do": 81,
+        "else": 82,
+        "enum": 83,
+        "export": 84,
+        "extends": 85,
+        "false": 86,
+        "finally": 87,
+        "for": 88,
+        "from": 143,
+        "function": 89,
+        "get": 125,
+        "if": 90,
+        "implements": 108,
+        "import": 91,
+        "in": 92,
+        "infer": 126,
+        "instanceof": 93,
+        "interface": 109,
+        "is": 127,
+        "keyof": 128,
+        "let": 110,
+        "module": 129,
+        "namespace": 130,
+        "never": 131,
+        "new": 94,
+        "null": 95,
+        "number": 134,
+        "object": 135,
+        "package": 111,
+        "private": 112,
+        "protected": 113,
+        "public": 114,
+        "readonly": 132,
+        "require": 133,
+        "global": 144,
+        "return": 96,
+        "set": 136,
+        "static": 115,
+        "string": 137,
+        "super": 97,
+        "switch": 98,
+        "symbol": 138,
+        "this": 99,
+        "throw": 100,
+        "true": 101,
+        "try": 102,
+        "type": 139,
+        "typeof": 103,
+        "undefined": 140,
+        "unique": 141,
+        "unknown": 142,
+        "var": 104,
+        "void": 105,
+        "while": 106,
+        "with": 107,
+        "yield": 116,
+        "async": 120,
+        "await": 121,
+        "of": 145,
+        "{": 17,
+        "}": 18,
+        "(": 19,
+        ")": 20,
+        "[": 21,
+        "]": 22,
+        ".": 23,
+        "...": 24,
+        ";": 25,
+        ",": 26,
+        "<": 27,
+        ">": 29,
+        "<=": 30,
+        ">=": 31,
+        "==": 32,
+        "!=": 33,
+        "===": 34,
+        "!==": 35,
+        "=>": 36,
+        "+": 37,
+        "-": 38,
+        "**": 40,
+        "*": 39,
+        "/": 41,
+        "%": 42,
+        "++": 43,
+        "--": 44,
+        "<<": 45,
+        "</": 28,
+        ">>": 46,
+        ">>>": 47,
+        "&": 48,
+        "|": 49,
+        "^": 50,
+        "!": 51,
+        "~": 52,
+        "&&": 53,
+        "||": 54,
+        "?": 55,
+        ":": 56,
+        "=": 58,
+        "+=": 59,
+        "-=": 60,
+        "*=": 61,
+        "**=": 62,
+        "/=": 63,
+        "%=": 64,
+        "<<=": 65,
+        ">>=": 66,
+        ">>>=": 67,
+        "&=": 68,
+        "|=": 69,
+        "^=": 70,
+        "@": 57,
     });
-    /*
-        As per ECMAScript Language Specification 3th Edition, Section 7.6: Identifiers
-        IdentifierStart ::
-            Can contain Unicode 3.0.0 categories:
-            Uppercase letter (Lu),
-            Lowercase letter (Ll),
-            Titlecase letter (Lt),
-            Modifier letter (Lm),
-            Other letter (Lo), or
-            Letter number (Nl).
-        IdentifierPart :: =
-            Can contain IdentifierStart + Unicode 3.0.0 categories:
-            Non-spacing mark (Mn),
-            Combining spacing mark (Mc),
-            Decimal number (Nd), or
-            Connector punctuation (Pc).
-
-        Codepoint ranges for ES3 Identifiers are extracted from the Unicode 3.0.0 specification at:
-        http://www.unicode.org/Public/3.0-Update/UnicodeData-3.0.0.txt
-    */
     var unicodeES3IdentifierStart = [170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 543, 546, 563, 592, 685, 688, 696, 699, 705, 720, 721, 736, 740, 750, 750, 890, 890, 902, 902, 904, 906, 908, 908, 910, 929, 931, 974, 976, 983, 986, 1011, 1024, 1153, 1164, 1220, 1223, 1224, 1227, 1228, 1232, 1269, 1272, 1273, 1329, 1366, 1369, 1369, 1377, 1415, 1488, 1514, 1520, 1522, 1569, 1594, 1600, 1610, 1649, 1747, 1749, 1749, 1765, 1766, 1786, 1788, 1808, 1808, 1810, 1836, 1920, 1957, 2309, 2361, 2365, 2365, 2384, 2384, 2392, 2401, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2524, 2525, 2527, 2529, 2544, 2545, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2649, 2652, 2654, 2654, 2674, 2676, 2693, 2699, 2701, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2749, 2749, 2768, 2768, 2784, 2784, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2870, 2873, 2877, 2877, 2908, 2909, 2911, 2913, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 2997, 2999, 3001, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125, 3129, 3168, 3169, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3294, 3294, 3296, 3297, 3333, 3340, 3342, 3344, 3346, 3368, 3370, 3385, 3424, 3425, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3585, 3632, 3634, 3635, 3648, 3654, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3760, 3762, 3763, 3773, 3773, 3776, 3780, 3782, 3782, 3804, 3805, 3840, 3840, 3904, 3911, 3913, 3946, 3976, 3979, 4096, 4129, 4131, 4135, 4137, 4138, 4176, 4181, 4256, 4293, 4304, 4342, 4352, 4441, 4447, 4514, 4520, 4601, 4608, 4614, 4616, 4678, 4680, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4742, 4744, 4744, 4746, 4749, 4752, 4782, 4784, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4814, 4816, 4822, 4824, 4846, 4848, 4878, 4880, 4880, 4882, 4885, 4888, 4894, 4896, 4934, 4936, 4954, 5024, 5108, 5121, 5740, 5743, 5750, 5761, 5786, 5792, 5866, 6016, 6067, 6176, 6263, 6272, 6312, 7680, 7835, 7840, 7929, 7936, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8319, 8319, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8497, 8499, 8505, 8544, 8579, 12293, 12295, 12321, 12329, 12337, 12341, 12344, 12346, 12353, 12436, 12445, 12446, 12449, 12538, 12540, 12542, 12549, 12588, 12593, 12686, 12704, 12727, 13312, 19893, 19968, 40869, 40960, 42124, 44032, 55203, 63744, 64045, 64256, 64262, 64275, 64279, 64285, 64285, 64287, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65136, 65138, 65140, 65140, 65142, 65276, 65313, 65338, 65345, 65370, 65382, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
     var unicodeES3IdentifierPart = [170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 543, 546, 563, 592, 685, 688, 696, 699, 705, 720, 721, 736, 740, 750, 750, 768, 846, 864, 866, 890, 890, 902, 902, 904, 906, 908, 908, 910, 929, 931, 974, 976, 983, 986, 1011, 1024, 1153, 1155, 1158, 1164, 1220, 1223, 1224, 1227, 1228, 1232, 1269, 1272, 1273, 1329, 1366, 1369, 1369, 1377, 1415, 1425, 1441, 1443, 1465, 1467, 1469, 1471, 1471, 1473, 1474, 1476, 1476, 1488, 1514, 1520, 1522, 1569, 1594, 1600, 1621, 1632, 1641, 1648, 1747, 1749, 1756, 1759, 1768, 1770, 1773, 1776, 1788, 1808, 1836, 1840, 1866, 1920, 1968, 2305, 2307, 2309, 2361, 2364, 2381, 2384, 2388, 2392, 2403, 2406, 2415, 2433, 2435, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2492, 2492, 2494, 2500, 2503, 2504, 2507, 2509, 2519, 2519, 2524, 2525, 2527, 2531, 2534, 2545, 2562, 2562, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2620, 2620, 2622, 2626, 2631, 2632, 2635, 2637, 2649, 2652, 2654, 2654, 2662, 2676, 2689, 2691, 2693, 2699, 2701, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2748, 2757, 2759, 2761, 2763, 2765, 2768, 2768, 2784, 2784, 2790, 2799, 2817, 2819, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2870, 2873, 2876, 2883, 2887, 2888, 2891, 2893, 2902, 2903, 2908, 2909, 2911, 2913, 2918, 2927, 2946, 2947, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 2997, 2999, 3001, 3006, 3010, 3014, 3016, 3018, 3021, 3031, 3031, 3047, 3055, 3073, 3075, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125, 3129, 3134, 3140, 3142, 3144, 3146, 3149, 3157, 3158, 3168, 3169, 3174, 3183, 3202, 3203, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3262, 3268, 3270, 3272, 3274, 3277, 3285, 3286, 3294, 3294, 3296, 3297, 3302, 3311, 3330, 3331, 3333, 3340, 3342, 3344, 3346, 3368, 3370, 3385, 3390, 3395, 3398, 3400, 3402, 3405, 3415, 3415, 3424, 3425, 3430, 3439, 3458, 3459, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3530, 3530, 3535, 3540, 3542, 3542, 3544, 3551, 3570, 3571, 3585, 3642, 3648, 3662, 3664, 3673, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3769, 3771, 3773, 3776, 3780, 3782, 3782, 3784, 3789, 3792, 3801, 3804, 3805, 3840, 3840, 3864, 3865, 3872, 3881, 3893, 3893, 3895, 3895, 3897, 3897, 3902, 3911, 3913, 3946, 3953, 3972, 3974, 3979, 3984, 3991, 3993, 4028, 4038, 4038, 4096, 4129, 4131, 4135, 4137, 4138, 4140, 4146, 4150, 4153, 4160, 4169, 4176, 4185, 4256, 4293, 4304, 4342, 4352, 4441, 4447, 4514, 4520, 4601, 4608, 4614, 4616, 4678, 4680, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4742, 4744, 4744, 4746, 4749, 4752, 4782, 4784, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4814, 4816, 4822, 4824, 4846, 4848, 4878, 4880, 4880, 4882, 4885, 4888, 4894, 4896, 4934, 4936, 4954, 4969, 4977, 5024, 5108, 5121, 5740, 5743, 5750, 5761, 5786, 5792, 5866, 6016, 6099, 6112, 6121, 6160, 6169, 6176, 6263, 6272, 6313, 7680, 7835, 7840, 7929, 7936, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8255, 8256, 8319, 8319, 8400, 8412, 8417, 8417, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8497, 8499, 8505, 8544, 8579, 12293, 12295, 12321, 12335, 12337, 12341, 12344, 12346, 12353, 12436, 12441, 12442, 12445, 12446, 12449, 12542, 12549, 12588, 12593, 12686, 12704, 12727, 13312, 19893, 19968, 40869, 40960, 42124, 44032, 55203, 63744, 64045, 64256, 64262, 64275, 64279, 64285, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65056, 65059, 65075, 65076, 65101, 65103, 65136, 65138, 65140, 65140, 65142, 65276, 65296, 65305, 65313, 65338, 65343, 65343, 65345, 65370, 65381, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
-    /*
-        As per ECMAScript Language Specification 5th Edition, Section 7.6: ISyntaxToken Names and Identifiers
-        IdentifierStart ::
-            Can contain Unicode 6.2 categories:
-            Uppercase letter (Lu),
-            Lowercase letter (Ll),
-            Titlecase letter (Lt),
-            Modifier letter (Lm),
-            Other letter (Lo), or
-            Letter number (Nl).
-        IdentifierPart ::
-            Can contain IdentifierStart + Unicode 6.2 categories:
-            Non-spacing mark (Mn),
-            Combining spacing mark (Mc),
-            Decimal number (Nd),
-            Connector punctuation (Pc),
-            <ZWNJ>, or
-            <ZWJ>.
-
-        Codepoint ranges for ES5 Identifiers are extracted from the Unicode 6.2 specification at:
-        http://www.unicode.org/Public/6.2.0/ucd/UnicodeData.txt
-    */
     var unicodeES5IdentifierStart = [170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 705, 710, 721, 736, 740, 748, 748, 750, 750, 880, 884, 886, 887, 890, 893, 902, 902, 904, 906, 908, 908, 910, 929, 931, 1013, 1015, 1153, 1162, 1319, 1329, 1366, 1369, 1369, 1377, 1415, 1488, 1514, 1520, 1522, 1568, 1610, 1646, 1647, 1649, 1747, 1749, 1749, 1765, 1766, 1774, 1775, 1786, 1788, 1791, 1791, 1808, 1808, 1810, 1839, 1869, 1957, 1969, 1969, 1994, 2026, 2036, 2037, 2042, 2042, 2048, 2069, 2074, 2074, 2084, 2084, 2088, 2088, 2112, 2136, 2208, 2208, 2210, 2220, 2308, 2361, 2365, 2365, 2384, 2384, 2392, 2401, 2417, 2423, 2425, 2431, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2493, 2493, 2510, 2510, 2524, 2525, 2527, 2529, 2544, 2545, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2649, 2652, 2654, 2654, 2674, 2676, 2693, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2749, 2749, 2768, 2768, 2784, 2785, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2869, 2873, 2877, 2877, 2908, 2909, 2911, 2913, 2929, 2929, 2947, 2947, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 3001, 3024, 3024, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125, 3129, 3133, 3133, 3160, 3161, 3168, 3169, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3261, 3261, 3294, 3294, 3296, 3297, 3313, 3314, 3333, 3340, 3342, 3344, 3346, 3386, 3389, 3389, 3406, 3406, 3424, 3425, 3450, 3455, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3585, 3632, 3634, 3635, 3648, 3654, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3760, 3762, 3763, 3773, 3773, 3776, 3780, 3782, 3782, 3804, 3807, 3840, 3840, 3904, 3911, 3913, 3948, 3976, 3980, 4096, 4138, 4159, 4159, 4176, 4181, 4186, 4189, 4193, 4193, 4197, 4198, 4206, 4208, 4213, 4225, 4238, 4238, 4256, 4293, 4295, 4295, 4301, 4301, 4304, 4346, 4348, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4744, 4746, 4749, 4752, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4822, 4824, 4880, 4882, 4885, 4888, 4954, 4992, 5007, 5024, 5108, 5121, 5740, 5743, 5759, 5761, 5786, 5792, 5866, 5870, 5872, 5888, 5900, 5902, 5905, 5920, 5937, 5952, 5969, 5984, 5996, 5998, 6000, 6016, 6067, 6103, 6103, 6108, 6108, 6176, 6263, 6272, 6312, 6314, 6314, 6320, 6389, 6400, 6428, 6480, 6509, 6512, 6516, 6528, 6571, 6593, 6599, 6656, 6678, 6688, 6740, 6823, 6823, 6917, 6963, 6981, 6987, 7043, 7072, 7086, 7087, 7098, 7141, 7168, 7203, 7245, 7247, 7258, 7293, 7401, 7404, 7406, 7409, 7413, 7414, 7424, 7615, 7680, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8305, 8305, 8319, 8319, 8336, 8348, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8505, 8508, 8511, 8517, 8521, 8526, 8526, 8544, 8584, 11264, 11310, 11312, 11358, 11360, 11492, 11499, 11502, 11506, 11507, 11520, 11557, 11559, 11559, 11565, 11565, 11568, 11623, 11631, 11631, 11648, 11670, 11680, 11686, 11688, 11694, 11696, 11702, 11704, 11710, 11712, 11718, 11720, 11726, 11728, 11734, 11736, 11742, 11823, 11823, 12293, 12295, 12321, 12329, 12337, 12341, 12344, 12348, 12353, 12438, 12445, 12447, 12449, 12538, 12540, 12543, 12549, 12589, 12593, 12686, 12704, 12730, 12784, 12799, 13312, 19893, 19968, 40908, 40960, 42124, 42192, 42237, 42240, 42508, 42512, 42527, 42538, 42539, 42560, 42606, 42623, 42647, 42656, 42735, 42775, 42783, 42786, 42888, 42891, 42894, 42896, 42899, 42912, 42922, 43000, 43009, 43011, 43013, 43015, 43018, 43020, 43042, 43072, 43123, 43138, 43187, 43250, 43255, 43259, 43259, 43274, 43301, 43312, 43334, 43360, 43388, 43396, 43442, 43471, 43471, 43520, 43560, 43584, 43586, 43588, 43595, 43616, 43638, 43642, 43642, 43648, 43695, 43697, 43697, 43701, 43702, 43705, 43709, 43712, 43712, 43714, 43714, 43739, 43741, 43744, 43754, 43762, 43764, 43777, 43782, 43785, 43790, 43793, 43798, 43808, 43814, 43816, 43822, 43968, 44002, 44032, 55203, 55216, 55238, 55243, 55291, 63744, 64109, 64112, 64217, 64256, 64262, 64275, 64279, 64285, 64285, 64287, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65136, 65140, 65142, 65276, 65313, 65338, 65345, 65370, 65382, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
     var unicodeES5IdentifierPart = [170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 705, 710, 721, 736, 740, 748, 748, 750, 750, 768, 884, 886, 887, 890, 893, 902, 902, 904, 906, 908, 908, 910, 929, 931, 1013, 1015, 1153, 1155, 1159, 1162, 1319, 1329, 1366, 1369, 1369, 1377, 1415, 1425, 1469, 1471, 1471, 1473, 1474, 1476, 1477, 1479, 1479, 1488, 1514, 1520, 1522, 1552, 1562, 1568, 1641, 1646, 1747, 1749, 1756, 1759, 1768, 1770, 1788, 1791, 1791, 1808, 1866, 1869, 1969, 1984, 2037, 2042, 2042, 2048, 2093, 2112, 2139, 2208, 2208, 2210, 2220, 2276, 2302, 2304, 2403, 2406, 2415, 2417, 2423, 2425, 2431, 2433, 2435, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2492, 2500, 2503, 2504, 2507, 2510, 2519, 2519, 2524, 2525, 2527, 2531, 2534, 2545, 2561, 2563, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2620, 2620, 2622, 2626, 2631, 2632, 2635, 2637, 2641, 2641, 2649, 2652, 2654, 2654, 2662, 2677, 2689, 2691, 2693, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2748, 2757, 2759, 2761, 2763, 2765, 2768, 2768, 2784, 2787, 2790, 2799, 2817, 2819, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2869, 2873, 2876, 2884, 2887, 2888, 2891, 2893, 2902, 2903, 2908, 2909, 2911, 2915, 2918, 2927, 2929, 2929, 2946, 2947, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 3001, 3006, 3010, 3014, 3016, 3018, 3021, 3024, 3024, 3031, 3031, 3046, 3055, 3073, 3075, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125, 3129, 3133, 3140, 3142, 3144, 3146, 3149, 3157, 3158, 3160, 3161, 3168, 3171, 3174, 3183, 3202, 3203, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3260, 3268, 3270, 3272, 3274, 3277, 3285, 3286, 3294, 3294, 3296, 3299, 3302, 3311, 3313, 3314, 3330, 3331, 3333, 3340, 3342, 3344, 3346, 3386, 3389, 3396, 3398, 3400, 3402, 3406, 3415, 3415, 3424, 3427, 3430, 3439, 3450, 3455, 3458, 3459, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3530, 3530, 3535, 3540, 3542, 3542, 3544, 3551, 3570, 3571, 3585, 3642, 3648, 3662, 3664, 3673, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3769, 3771, 3773, 3776, 3780, 3782, 3782, 3784, 3789, 3792, 3801, 3804, 3807, 3840, 3840, 3864, 3865, 3872, 3881, 3893, 3893, 3895, 3895, 3897, 3897, 3902, 3911, 3913, 3948, 3953, 3972, 3974, 3991, 3993, 4028, 4038, 4038, 4096, 4169, 4176, 4253, 4256, 4293, 4295, 4295, 4301, 4301, 4304, 4346, 4348, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4744, 4746, 4749, 4752, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4822, 4824, 4880, 4882, 4885, 4888, 4954, 4957, 4959, 4992, 5007, 5024, 5108, 5121, 5740, 5743, 5759, 5761, 5786, 5792, 5866, 5870, 5872, 5888, 5900, 5902, 5908, 5920, 5940, 5952, 5971, 5984, 5996, 5998, 6000, 6002, 6003, 6016, 6099, 6103, 6103, 6108, 6109, 6112, 6121, 6155, 6157, 6160, 6169, 6176, 6263, 6272, 6314, 6320, 6389, 6400, 6428, 6432, 6443, 6448, 6459, 6470, 6509, 6512, 6516, 6528, 6571, 6576, 6601, 6608, 6617, 6656, 6683, 6688, 6750, 6752, 6780, 6783, 6793, 6800, 6809, 6823, 6823, 6912, 6987, 6992, 7001, 7019, 7027, 7040, 7155, 7168, 7223, 7232, 7241, 7245, 7293, 7376, 7378, 7380, 7414, 7424, 7654, 7676, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8204, 8205, 8255, 8256, 8276, 8276, 8305, 8305, 8319, 8319, 8336, 8348, 8400, 8412, 8417, 8417, 8421, 8432, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8505, 8508, 8511, 8517, 8521, 8526, 8526, 8544, 8584, 11264, 11310, 11312, 11358, 11360, 11492, 11499, 11507, 11520, 11557, 11559, 11559, 11565, 11565, 11568, 11623, 11631, 11631, 11647, 11670, 11680, 11686, 11688, 11694, 11696, 11702, 11704, 11710, 11712, 11718, 11720, 11726, 11728, 11734, 11736, 11742, 11744, 11775, 11823, 11823, 12293, 12295, 12321, 12335, 12337, 12341, 12344, 12348, 12353, 12438, 12441, 12442, 12445, 12447, 12449, 12538, 12540, 12543, 12549, 12589, 12593, 12686, 12704, 12730, 12784, 12799, 13312, 19893, 19968, 40908, 40960, 42124, 42192, 42237, 42240, 42508, 42512, 42539, 42560, 42607, 42612, 42621, 42623, 42647, 42655, 42737, 42775, 42783, 42786, 42888, 42891, 42894, 42896, 42899, 42912, 42922, 43000, 43047, 43072, 43123, 43136, 43204, 43216, 43225, 43232, 43255, 43259, 43259, 43264, 43309, 43312, 43347, 43360, 43388, 43392, 43456, 43471, 43481, 43520, 43574, 43584, 43597, 43600, 43609, 43616, 43638, 43642, 43643, 43648, 43714, 43739, 43741, 43744, 43759, 43762, 43766, 43777, 43782, 43785, 43790, 43793, 43798, 43808, 43814, 43816, 43822, 43968, 44010, 44012, 44013, 44016, 44025, 44032, 55203, 55216, 55238, 55243, 55291, 63744, 64109, 64112, 64217, 64256, 64262, 64275, 64279, 64285, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65024, 65039, 65056, 65062, 65075, 65076, 65101, 65103, 65136, 65140, 65142, 65276, 65296, 65305, 65313, 65338, 65343, 65343, 65345, 65370, 65382, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
     function lookupInUnicodeMap(code, map) {
-        // Bail out quickly if it couldn't possibly be in the map.
         if (code < map[0]) {
             return false;
         }
-        // Perform binary search in one of the Unicode range maps
         var lo = 0;
         var hi = map.length;
         var mid;
         while (lo + 1 < hi) {
             mid = lo + (hi - lo) / 2;
-            // mid has to be even to catch a range's beginning
             mid -= mid % 2;
             if (map[mid] <= code && code <= map[mid + 1]) {
                 return true;
@@ -5774,14 +3882,14 @@ var ts;
         }
         return false;
     }
-    /* @internal */ function isUnicodeIdentifierStart(code, languageVersion) {
-        return languageVersion >= 1 /* ES5 */ ?
+    function isUnicodeIdentifierStart(code, languageVersion) {
+        return languageVersion >= 1 ?
             lookupInUnicodeMap(code, unicodeES5IdentifierStart) :
             lookupInUnicodeMap(code, unicodeES3IdentifierStart);
     }
     ts.isUnicodeIdentifierStart = isUnicodeIdentifierStart;
     function isUnicodeIdentifierPart(code, languageVersion) {
-        return languageVersion >= 1 /* ES5 */ ?
+        return languageVersion >= 1 ?
             lookupInUnicodeMap(code, unicodeES5IdentifierPart) :
             lookupInUnicodeMap(code, unicodeES3IdentifierPart);
     }
@@ -5797,12 +3905,10 @@ var ts;
         return tokenStrings[t];
     }
     ts.tokenToString = tokenToString;
-    /* @internal */
     function stringToToken(s) {
         return textToToken.get(s);
     }
     ts.stringToToken = stringToToken;
-    /* @internal */
     function computeLineStarts(text) {
         var result = new Array();
         var pos = 0;
@@ -5811,17 +3917,16 @@ var ts;
             var ch = text.charCodeAt(pos);
             pos++;
             switch (ch) {
-                case 13 /* carriageReturn */:
-                    if (text.charCodeAt(pos) === 10 /* lineFeed */) {
+                case 13:
+                    if (text.charCodeAt(pos) === 10) {
                         pos++;
                     }
-                // falls through
-                case 10 /* lineFeed */:
+                case 10:
                     result.push(lineStart);
                     lineStart = pos;
                     break;
                 default:
-                    if (ch > 127 /* maxAsciiCharacter */ && isLineBreak(ch)) {
+                    if (ch > 127 && isLineBreak(ch)) {
                         result.push(lineStart);
                         lineStart = pos;
                     }
@@ -5836,7 +3941,6 @@ var ts;
         return computePositionOfLineAndCharacter(getLineStarts(sourceFile), line, character, sourceFile.text);
     }
     ts.getPositionOfLineAndCharacter = getPositionOfLineAndCharacter;
-    /* @internal */
     function computePositionOfLineAndCharacter(lineStarts, line, character, debugText) {
         if (line < 0 || line >= lineStarts.length) {
             ts.Debug.fail("Bad line number. Line: " + line + ", lineStarts.length: " + lineStarts.length + " , line map is correct? " + (debugText !== undefined ? ts.arraysEqual(lineStarts, computeLineStarts(debugText)) : "unknown"));
@@ -5846,30 +3950,18 @@ var ts;
             ts.Debug.assert(res < lineStarts[line + 1]);
         }
         else if (debugText !== undefined) {
-            ts.Debug.assert(res <= debugText.length); // Allow single character overflow for trailing newline
+            ts.Debug.assert(res <= debugText.length);
         }
         return res;
     }
     ts.computePositionOfLineAndCharacter = computePositionOfLineAndCharacter;
-    /* @internal */
     function getLineStarts(sourceFile) {
         return sourceFile.lineMap || (sourceFile.lineMap = computeLineStarts(sourceFile.text));
     }
     ts.getLineStarts = getLineStarts;
-    /* @internal */
-    /**
-     * We assume the first line starts at position 0 and 'position' is non-negative.
-     */
     function computeLineAndCharacterOfPosition(lineStarts, position) {
         var lineNumber = ts.binarySearch(lineStarts, position, ts.identity, ts.compareValues);
         if (lineNumber < 0) {
-            // If the actual position was not found,
-            // the binary search returns the 2's-complement of the next line start
-            // e.g. if the line starts at [5, 10, 23, 80] and the position requested was 20
-            // then the search will return -2.
-            //
-            // We want the index of the previous line start, so we subtract 1.
-            // Review 2's-complement if this is confusing.
             lineNumber = ~lineNumber - 1;
             ts.Debug.assert(lineNumber !== -1, "position cannot precede the beginning of the file");
         }
@@ -5887,107 +3979,86 @@ var ts;
         return isWhiteSpaceSingleLine(ch) || isLineBreak(ch);
     }
     ts.isWhiteSpaceLike = isWhiteSpaceLike;
-    /** Does not include line breaks. For that, see isWhiteSpaceLike. */
     function isWhiteSpaceSingleLine(ch) {
-        // Note: nextLine is in the Zs space, and should be considered to be a whitespace.
-        // It is explicitly not a line-break as it isn't in the exact set specified by EcmaScript.
-        return ch === 32 /* space */ ||
-            ch === 9 /* tab */ ||
-            ch === 11 /* verticalTab */ ||
-            ch === 12 /* formFeed */ ||
-            ch === 160 /* nonBreakingSpace */ ||
-            ch === 133 /* nextLine */ ||
-            ch === 5760 /* ogham */ ||
-            ch >= 8192 /* enQuad */ && ch <= 8203 /* zeroWidthSpace */ ||
-            ch === 8239 /* narrowNoBreakSpace */ ||
-            ch === 8287 /* mathematicalSpace */ ||
-            ch === 12288 /* ideographicSpace */ ||
-            ch === 65279 /* byteOrderMark */;
+        return ch === 32 ||
+            ch === 9 ||
+            ch === 11 ||
+            ch === 12 ||
+            ch === 160 ||
+            ch === 133 ||
+            ch === 5760 ||
+            ch >= 8192 && ch <= 8203 ||
+            ch === 8239 ||
+            ch === 8287 ||
+            ch === 12288 ||
+            ch === 65279;
     }
     ts.isWhiteSpaceSingleLine = isWhiteSpaceSingleLine;
     function isLineBreak(ch) {
-        // ES5 7.3:
-        // The ECMAScript line terminator characters are listed in Table 3.
-        //     Table 3: Line Terminator Characters
-        //     Code Unit Value     Name                    Formal Name
-        //     \u000A              Line Feed               <LF>
-        //     \u000D              Carriage Return         <CR>
-        //     \u2028              Line separator          <LS>
-        //     \u2029              Paragraph separator     <PS>
-        // Only the characters in Table 3 are treated as line terminators. Other new line or line
-        // breaking characters are treated as white space but not as line terminators.
-        return ch === 10 /* lineFeed */ ||
-            ch === 13 /* carriageReturn */ ||
-            ch === 8232 /* lineSeparator */ ||
-            ch === 8233 /* paragraphSeparator */;
+        return ch === 10 ||
+            ch === 13 ||
+            ch === 8232 ||
+            ch === 8233;
     }
     ts.isLineBreak = isLineBreak;
     function isDigit(ch) {
-        return ch >= 48 /* _0 */ && ch <= 57 /* _9 */;
+        return ch >= 48 && ch <= 57;
     }
-    /* @internal */
     function isOctalDigit(ch) {
-        return ch >= 48 /* _0 */ && ch <= 55 /* _7 */;
+        return ch >= 48 && ch <= 55;
     }
     ts.isOctalDigit = isOctalDigit;
     function couldStartTrivia(text, pos) {
-        // Keep in sync with skipTrivia
         var ch = text.charCodeAt(pos);
         switch (ch) {
-            case 13 /* carriageReturn */:
-            case 10 /* lineFeed */:
-            case 9 /* tab */:
-            case 11 /* verticalTab */:
-            case 12 /* formFeed */:
-            case 32 /* space */:
-            case 47 /* slash */:
-            // starts of normal trivia
-            case 60 /* lessThan */:
-            case 124 /* bar */:
-            case 61 /* equals */:
-            case 62 /* greaterThan */:
-                // Starts of conflict marker trivia
+            case 13:
+            case 10:
+            case 9:
+            case 11:
+            case 12:
+            case 32:
+            case 47:
+            case 60:
+            case 124:
+            case 61:
+            case 62:
                 return true;
-            case 35 /* hash */:
-                // Only if its the beginning can we have #! trivia
+            case 35:
                 return pos === 0;
             default:
-                return ch > 127 /* maxAsciiCharacter */;
+                return ch > 127;
         }
     }
     ts.couldStartTrivia = couldStartTrivia;
-    /* @internal */
     function skipTrivia(text, pos, stopAfterLineBreak, stopAtComments) {
         if (stopAtComments === void 0) { stopAtComments = false; }
         if (ts.positionIsSynthesized(pos)) {
             return pos;
         }
-        // Keep in sync with couldStartTrivia
         while (true) {
             var ch = text.charCodeAt(pos);
             switch (ch) {
-                case 13 /* carriageReturn */:
-                    if (text.charCodeAt(pos + 1) === 10 /* lineFeed */) {
+                case 13:
+                    if (text.charCodeAt(pos + 1) === 10) {
                         pos++;
                     }
-                // falls through
-                case 10 /* lineFeed */:
+                case 10:
                     pos++;
                     if (stopAfterLineBreak) {
                         return pos;
                     }
                     continue;
-                case 9 /* tab */:
-                case 11 /* verticalTab */:
-                case 12 /* formFeed */:
-                case 32 /* space */:
+                case 9:
+                case 11:
+                case 12:
+                case 32:
                     pos++;
                     continue;
-                case 47 /* slash */:
+                case 47:
                     if (stopAtComments) {
                         break;
                     }
-                    if (text.charCodeAt(pos + 1) === 47 /* slash */) {
+                    if (text.charCodeAt(pos + 1) === 47) {
                         pos += 2;
                         while (pos < text.length) {
                             if (isLineBreak(text.charCodeAt(pos))) {
@@ -5997,10 +4068,10 @@ var ts;
                         }
                         continue;
                     }
-                    if (text.charCodeAt(pos + 1) === 42 /* asterisk */) {
+                    if (text.charCodeAt(pos + 1) === 42) {
                         pos += 2;
                         while (pos < text.length) {
-                            if (text.charCodeAt(pos) === 42 /* asterisk */ && text.charCodeAt(pos + 1) === 47 /* slash */) {
+                            if (text.charCodeAt(pos) === 42 && text.charCodeAt(pos + 1) === 47) {
                                 pos += 2;
                                 break;
                             }
@@ -6009,23 +4080,23 @@ var ts;
                         continue;
                     }
                     break;
-                case 60 /* lessThan */:
-                case 124 /* bar */:
-                case 61 /* equals */:
-                case 62 /* greaterThan */:
+                case 60:
+                case 124:
+                case 61:
+                case 62:
                     if (isConflictMarkerTrivia(text, pos)) {
                         pos = scanConflictMarkerTrivia(text, pos);
                         continue;
                     }
                     break;
-                case 35 /* hash */:
+                case 35:
                     if (pos === 0 && isShebangTrivia(text, pos)) {
                         pos = scanShebangTrivia(text, pos);
                         continue;
                     }
                     break;
                 default:
-                    if (ch > 127 /* maxAsciiCharacter */ && (isWhiteSpaceLike(ch))) {
+                    if (ch > 127 && (isWhiteSpaceLike(ch))) {
                         pos++;
                         continue;
                     }
@@ -6035,12 +4106,9 @@ var ts;
         }
     }
     ts.skipTrivia = skipTrivia;
-    // All conflict markers consist of the same character repeated seven times.  If it is
-    // a <<<<<<< or >>>>>>> marker then it is also followed by a space.
     var mergeConflictMarkerLength = "<<<<<<<".length;
     function isConflictMarkerTrivia(text, pos) {
         ts.Debug.assert(pos >= 0);
-        // Conflict markers must be at the start of a line.
         if (pos === 0 || isLineBreak(text.charCodeAt(pos - 1))) {
             var ch = text.charCodeAt(pos);
             if ((pos + mergeConflictMarkerLength) < text.length) {
@@ -6049,8 +4117,8 @@ var ts;
                         return false;
                     }
                 }
-                return ch === 61 /* equals */ ||
-                    text.charCodeAt(pos + mergeConflictMarkerLength) === 32 /* space */;
+                return ch === 61 ||
+                    text.charCodeAt(pos + mergeConflictMarkerLength) === 32;
             }
         }
         return false;
@@ -6061,18 +4129,16 @@ var ts;
         }
         var ch = text.charCodeAt(pos);
         var len = text.length;
-        if (ch === 60 /* lessThan */ || ch === 62 /* greaterThan */) {
+        if (ch === 60 || ch === 62) {
             while (pos < len && !isLineBreak(text.charCodeAt(pos))) {
                 pos++;
             }
         }
         else {
-            ts.Debug.assert(ch === 124 /* bar */ || ch === 61 /* equals */);
-            // Consume everything from the start of a ||||||| or ======= marker to the start
-            // of the next ======= or >>>>>>> marker.
+            ts.Debug.assert(ch === 124 || ch === 61);
             while (pos < len) {
                 var currentChar = text.charCodeAt(pos);
-                if ((currentChar === 61 /* equals */ || currentChar === 62 /* greaterThan */) && currentChar !== ch && isConflictMarkerTrivia(text, pos)) {
+                if ((currentChar === 61 || currentChar === 62) && currentChar !== ch && isConflictMarkerTrivia(text, pos)) {
                     break;
                 }
                 pos++;
@@ -6082,7 +4148,6 @@ var ts;
     }
     var shebangTriviaRegex = /^#!.*/;
     function isShebangTrivia(text, pos) {
-        // Shebangs check must only be done at the start of the file
         ts.Debug.assert(pos === 0);
         return shebangTriviaRegex.test(text);
     }
@@ -6091,26 +4156,6 @@ var ts;
         pos = pos + shebang.length;
         return pos;
     }
-    /**
-     * Invokes a callback for each comment range following the provided position.
-     *
-     * Single-line comment ranges include the leading double-slash characters but not the ending
-     * line break. Multi-line comment ranges include the leading slash-asterisk and trailing
-     * asterisk-slash characters.
-     *
-     * @param reduce If true, accumulates the result of calling the callback in a fashion similar
-     *      to reduceLeft. If false, iteration stops when the callback returns a truthy value.
-     * @param text The source text to scan.
-     * @param pos The position at which to start scanning.
-     * @param trailing If false, whitespace is skipped until the first line break and comments
-     *      between that location and the next token are returned. If true, comments occurring
-     *      between the given position and the next line break are returned.
-     * @param cb The callback to execute as each comment range is encountered.
-     * @param state A state value to pass to each iteration of the callback.
-     * @param initial An initial value to pass when accumulating results (when "reduce" is true).
-     * @returns If "reduce" is true, the accumulated value. If "reduce" is false, the first truthy
-     *      return value of the callback.
-     */
     function iterateCommentRanges(reduce, text, pos, trailing, cb, state, initial) {
         var pendingPos;
         var pendingEnd;
@@ -6122,12 +4167,11 @@ var ts;
         scan: while (pos >= 0 && pos < text.length) {
             var ch = text.charCodeAt(pos);
             switch (ch) {
-                case 13 /* carriageReturn */:
-                    if (text.charCodeAt(pos + 1) === 10 /* lineFeed */) {
+                case 13:
+                    if (text.charCodeAt(pos + 1) === 10) {
                         pos++;
                     }
-                // falls through
-                case 10 /* lineFeed */:
+                case 10:
                     pos++;
                     if (trailing) {
                         break scan;
@@ -6137,20 +4181,20 @@ var ts;
                         pendingHasTrailingNewLine = true;
                     }
                     continue;
-                case 9 /* tab */:
-                case 11 /* verticalTab */:
-                case 12 /* formFeed */:
-                case 32 /* space */:
+                case 9:
+                case 11:
+                case 12:
+                case 32:
                     pos++;
                     continue;
-                case 47 /* slash */:
+                case 47:
                     var nextChar = text.charCodeAt(pos + 1);
                     var hasTrailingNewLine = false;
-                    if (nextChar === 47 /* slash */ || nextChar === 42 /* asterisk */) {
-                        var kind = nextChar === 47 /* slash */ ? 2 /* SingleLineCommentTrivia */ : 3 /* MultiLineCommentTrivia */;
+                    if (nextChar === 47 || nextChar === 42) {
+                        var kind = nextChar === 47 ? 2 : 3;
                         var startPos = pos;
                         pos += 2;
-                        if (nextChar === 47 /* slash */) {
+                        if (nextChar === 47) {
                             while (pos < text.length) {
                                 if (isLineBreak(text.charCodeAt(pos))) {
                                     hasTrailingNewLine = true;
@@ -6161,7 +4205,7 @@ var ts;
                         }
                         else {
                             while (pos < text.length) {
-                                if (text.charCodeAt(pos) === 42 /* asterisk */ && text.charCodeAt(pos + 1) === 47 /* slash */) {
+                                if (text.charCodeAt(pos) === 42 && text.charCodeAt(pos + 1) === 47) {
                                     pos += 2;
                                     break;
                                 }
@@ -6172,7 +4216,6 @@ var ts;
                             if (hasPendingCommentRange) {
                                 accumulator = cb(pendingPos, pendingEnd, pendingKind, pendingHasTrailingNewLine, state, accumulator);
                                 if (!reduce && accumulator) {
-                                    // If we are not reducing and we have a truthy result, return it.
                                     return accumulator;
                                 }
                             }
@@ -6186,7 +4229,7 @@ var ts;
                     }
                     break scan;
                 default:
-                    if (ch > 127 /* maxAsciiCharacter */ && (isWhiteSpaceLike(ch))) {
+                    if (ch > 127 && (isWhiteSpaceLike(ch))) {
                         if (hasPendingCommentRange && isLineBreak(ch)) {
                             pendingHasTrailingNewLine = true;
                         }
@@ -6202,19 +4245,19 @@ var ts;
         return accumulator;
     }
     function forEachLeadingCommentRange(text, pos, cb, state) {
-        return iterateCommentRanges(/*reduce*/ false, text, pos, /*trailing*/ false, cb, state);
+        return iterateCommentRanges(false, text, pos, false, cb, state);
     }
     ts.forEachLeadingCommentRange = forEachLeadingCommentRange;
     function forEachTrailingCommentRange(text, pos, cb, state) {
-        return iterateCommentRanges(/*reduce*/ false, text, pos, /*trailing*/ true, cb, state);
+        return iterateCommentRanges(false, text, pos, true, cb, state);
     }
     ts.forEachTrailingCommentRange = forEachTrailingCommentRange;
     function reduceEachLeadingCommentRange(text, pos, cb, state, initial) {
-        return iterateCommentRanges(/*reduce*/ true, text, pos, /*trailing*/ false, cb, state, initial);
+        return iterateCommentRanges(true, text, pos, false, cb, state, initial);
     }
     ts.reduceEachLeadingCommentRange = reduceEachLeadingCommentRange;
     function reduceEachTrailingCommentRange(text, pos, cb, state, initial) {
-        return iterateCommentRanges(/*reduce*/ true, text, pos, /*trailing*/ true, cb, state, initial);
+        return iterateCommentRanges(true, text, pos, true, cb, state, initial);
     }
     ts.reduceEachTrailingCommentRange = reduceEachTrailingCommentRange;
     function appendCommentRange(pos, end, kind, hasTrailingNewLine, _state, comments) {
@@ -6225,14 +4268,13 @@ var ts;
         return comments;
     }
     function getLeadingCommentRanges(text, pos) {
-        return reduceEachLeadingCommentRange(text, pos, appendCommentRange, /*state*/ undefined, /*initial*/ undefined);
+        return reduceEachLeadingCommentRange(text, pos, appendCommentRange, undefined, undefined);
     }
     ts.getLeadingCommentRanges = getLeadingCommentRanges;
     function getTrailingCommentRanges(text, pos) {
-        return reduceEachTrailingCommentRange(text, pos, appendCommentRange, /*state*/ undefined, /*initial*/ undefined);
+        return reduceEachTrailingCommentRange(text, pos, appendCommentRange, undefined, undefined);
     }
     ts.getTrailingCommentRanges = getTrailingCommentRanges;
-    /** Optionally, get the shebang */
     function getShebang(text) {
         var match = shebangTriviaRegex.exec(text);
         if (match) {
@@ -6241,18 +4283,17 @@ var ts;
     }
     ts.getShebang = getShebang;
     function isIdentifierStart(ch, languageVersion) {
-        return ch >= 65 /* A */ && ch <= 90 /* Z */ || ch >= 97 /* a */ && ch <= 122 /* z */ ||
-            ch === 36 /* $ */ || ch === 95 /* _ */ ||
-            ch > 127 /* maxAsciiCharacter */ && isUnicodeIdentifierStart(ch, languageVersion);
+        return ch >= 65 && ch <= 90 || ch >= 97 && ch <= 122 ||
+            ch === 36 || ch === 95 ||
+            ch > 127 && isUnicodeIdentifierStart(ch, languageVersion);
     }
     ts.isIdentifierStart = isIdentifierStart;
     function isIdentifierPart(ch, languageVersion) {
-        return ch >= 65 /* A */ && ch <= 90 /* Z */ || ch >= 97 /* a */ && ch <= 122 /* z */ ||
-            ch >= 48 /* _0 */ && ch <= 57 /* _9 */ || ch === 36 /* $ */ || ch === 95 /* _ */ ||
-            ch > 127 /* maxAsciiCharacter */ && isUnicodeIdentifierPart(ch, languageVersion);
+        return ch >= 65 && ch <= 90 || ch >= 97 && ch <= 122 ||
+            ch >= 48 && ch <= 57 || ch === 36 || ch === 95 ||
+            ch > 127 && isUnicodeIdentifierPart(ch, languageVersion);
     }
     ts.isIdentifierPart = isIdentifierPart;
-    /* @internal */
     function isIdentifierText(name, languageVersion) {
         if (!isIdentifierStart(name.charCodeAt(0), languageVersion)) {
             return false;
@@ -6265,17 +4306,12 @@ var ts;
         return true;
     }
     ts.isIdentifierText = isIdentifierText;
-    // Creates a scanner over a (possibly unspecified) range of a piece of text.
     function createScanner(languageVersion, skipTrivia, languageVariant, textInitial, onError, start, length) {
-        if (languageVariant === void 0) { languageVariant = 0 /* Standard */; }
+        if (languageVariant === void 0) { languageVariant = 0; }
         var text = textInitial;
-        // Current position (end position of text of current token)
         var pos;
-        // end of text
         var end;
-        // Start position of whitespace before current token
         var startPos;
-        // Start position of text of current token
         var tokenPos;
         var token;
         var tokenValue;
@@ -6288,11 +4324,11 @@ var ts;
             getTokenPos: function () { return tokenPos; },
             getTokenText: function () { return text.substring(tokenPos, pos); },
             getTokenValue: function () { return tokenValue; },
-            hasExtendedUnicodeEscape: function () { return (tokenFlags & 8 /* ExtendedUnicodeEscape */) !== 0; },
-            hasPrecedingLineBreak: function () { return (tokenFlags & 1 /* PrecedingLineBreak */) !== 0; },
-            isIdentifier: function () { return token === 71 /* Identifier */ || token > 107 /* LastReservedWord */; },
-            isReservedWord: function () { return token >= 72 /* FirstReservedWord */ && token <= 107 /* LastReservedWord */; },
-            isUnterminated: function () { return (tokenFlags & 4 /* Unterminated */) !== 0; },
+            hasExtendedUnicodeEscape: function () { return (tokenFlags & 8) !== 0; },
+            hasPrecedingLineBreak: function () { return (tokenFlags & 1) !== 0; },
+            isIdentifier: function () { return token === 71 || token > 107; },
+            isReservedWord: function () { return token >= 72 && token <= 107; },
+            isUnterminated: function () { return (tokenFlags & 4) !== 0; },
             getTokenFlags: function () { return tokenFlags; },
             reScanGreaterToken: reScanGreaterToken,
             reScanSlashToken: reScanSlashToken,
@@ -6329,8 +4365,8 @@ var ts;
             var result = "";
             while (true) {
                 var ch = text.charCodeAt(pos);
-                if (ch === 95 /* _ */) {
-                    tokenFlags |= 512 /* ContainsSeparator */;
+                if (ch === 95) {
+                    tokenFlags |= 512;
                     if (allowSeparator) {
                         allowSeparator = false;
                         isPreviousTokenSeparator = true;
@@ -6354,7 +4390,7 @@ var ts;
                 }
                 break;
             }
-            if (text.charCodeAt(pos - 1) === 95 /* _ */) {
+            if (text.charCodeAt(pos - 1) === 95) {
                 error(ts.Diagnostics.Numeric_separators_are_not_allowed_here, pos - 1, 1);
             }
             return result + text.substring(start, pos);
@@ -6364,15 +4400,15 @@ var ts;
             var mainFragment = scanNumberFragment();
             var decimalFragment;
             var scientificFragment;
-            if (text.charCodeAt(pos) === 46 /* dot */) {
+            if (text.charCodeAt(pos) === 46) {
                 pos++;
                 decimalFragment = scanNumberFragment();
             }
             var end = pos;
-            if (text.charCodeAt(pos) === 69 /* E */ || text.charCodeAt(pos) === 101 /* e */) {
+            if (text.charCodeAt(pos) === 69 || text.charCodeAt(pos) === 101) {
                 pos++;
-                tokenFlags |= 16 /* Scientific */;
-                if (text.charCodeAt(pos) === 43 /* plus */ || text.charCodeAt(pos) === 45 /* minus */)
+                tokenFlags |= 16;
+                if (text.charCodeAt(pos) === 43 || text.charCodeAt(pos) === 45)
                     pos++;
                 var preNumericPart = pos;
                 var finalFragment = scanNumberFragment();
@@ -6384,7 +4420,7 @@ var ts;
                     end = pos;
                 }
             }
-            if (tokenFlags & 512 /* ContainsSeparator */) {
+            if (tokenFlags & 512) {
                 var result = mainFragment;
                 if (decimalFragment) {
                     result += "." + decimalFragment;
@@ -6395,7 +4431,7 @@ var ts;
                 return "" + +result;
             }
             else {
-                return "" + +(text.substring(start, end)); // No need to use all the fragments; no _ removal needed
+                return "" + +(text.substring(start, end));
             }
         }
         function scanOctalDigits() {
@@ -6405,19 +4441,11 @@ var ts;
             }
             return +(text.substring(start, pos));
         }
-        /**
-         * Scans the given number of hexadecimal digits in the text,
-         * returning -1 if the given number is unavailable.
-         */
         function scanExactNumberOfHexDigits(count, canHaveSeparators) {
-            return scanHexDigits(/*minCount*/ count, /*scanAsManyAsPossible*/ false, canHaveSeparators);
+            return scanHexDigits(count, false, canHaveSeparators);
         }
-        /**
-         * Scans as many hexadecimal digits as are available in the text,
-         * returning -1 if the given number of digits was unavailable.
-         */
         function scanMinimumNumberOfHexDigits(count, canHaveSeparators) {
-            return scanHexDigits(/*minCount*/ count, /*scanAsManyAsPossible*/ true, canHaveSeparators);
+            return scanHexDigits(count, true, canHaveSeparators);
         }
         function scanHexDigits(minCount, scanAsManyAsPossible, canHaveSeparators) {
             var digits = 0;
@@ -6426,8 +4454,8 @@ var ts;
             var isPreviousTokenSeparator = false;
             while (digits < minCount || scanAsManyAsPossible) {
                 var ch = text.charCodeAt(pos);
-                if (canHaveSeparators && ch === 95 /* _ */) {
-                    tokenFlags |= 512 /* ContainsSeparator */;
+                if (canHaveSeparators && ch === 95) {
+                    tokenFlags |= 512;
                     if (allowSeparator) {
                         allowSeparator = false;
                         isPreviousTokenSeparator = true;
@@ -6442,14 +4470,14 @@ var ts;
                     continue;
                 }
                 allowSeparator = canHaveSeparators;
-                if (ch >= 48 /* _0 */ && ch <= 57 /* _9 */) {
-                    value = value * 16 + ch - 48 /* _0 */;
+                if (ch >= 48 && ch <= 57) {
+                    value = value * 16 + ch - 48;
                 }
-                else if (ch >= 65 /* A */ && ch <= 70 /* F */) {
-                    value = value * 16 + ch - 65 /* A */ + 10;
+                else if (ch >= 65 && ch <= 70) {
+                    value = value * 16 + ch - 65 + 10;
                 }
-                else if (ch >= 97 /* a */ && ch <= 102 /* f */) {
-                    value = value * 16 + ch - 97 /* a */ + 10;
+                else if (ch >= 97 && ch <= 102) {
+                    value = value * 16 + ch - 97 + 10;
                 }
                 else {
                     break;
@@ -6461,7 +4489,7 @@ var ts;
             if (digits < minCount) {
                 value = -1;
             }
-            if (text.charCodeAt(pos - 1) === 95 /* _ */) {
+            if (text.charCodeAt(pos - 1) === 95) {
                 error(ts.Diagnostics.Numeric_separators_are_not_allowed_here, pos - 1, 1);
             }
             return value;
@@ -6475,7 +4503,7 @@ var ts;
             while (true) {
                 if (pos >= end) {
                     result += text.substring(start, pos);
-                    tokenFlags |= 4 /* Unterminated */;
+                    tokenFlags |= 4;
                     error(ts.Diagnostics.Unterminated_string_literal);
                     break;
                 }
@@ -6485,7 +4513,7 @@ var ts;
                     pos++;
                     break;
                 }
-                if (ch === 92 /* backslash */ && !jsxAttributeString) {
+                if (ch === 92 && !jsxAttributeString) {
                     result += text.substring(start, pos);
                     result += scanEscapeSequence();
                     start = pos;
@@ -6493,7 +4521,7 @@ var ts;
                 }
                 if (isLineBreak(ch) && !jsxAttributeString) {
                     result += text.substring(start, pos);
-                    tokenFlags |= 4 /* Unterminated */;
+                    tokenFlags |= 4;
                     error(ts.Diagnostics.Unterminated_string_literal);
                     break;
                 }
@@ -6501,12 +4529,8 @@ var ts;
             }
             return result;
         }
-        /**
-         * Sets the current 'tokenValue' and returns a NoSubstitutionTemplateLiteral or
-         * a literal component of a TemplateExpression.
-         */
         function scanTemplateAndSetTokenValue() {
-            var startedWithBacktick = text.charCodeAt(pos) === 96 /* backtick */;
+            var startedWithBacktick = text.charCodeAt(pos) === 96;
             pos++;
             var start = pos;
             var contents = "";
@@ -6514,39 +4538,34 @@ var ts;
             while (true) {
                 if (pos >= end) {
                     contents += text.substring(start, pos);
-                    tokenFlags |= 4 /* Unterminated */;
+                    tokenFlags |= 4;
                     error(ts.Diagnostics.Unterminated_template_literal);
-                    resultingToken = startedWithBacktick ? 13 /* NoSubstitutionTemplateLiteral */ : 16 /* TemplateTail */;
+                    resultingToken = startedWithBacktick ? 13 : 16;
                     break;
                 }
                 var currChar = text.charCodeAt(pos);
-                // '`'
-                if (currChar === 96 /* backtick */) {
+                if (currChar === 96) {
                     contents += text.substring(start, pos);
                     pos++;
-                    resultingToken = startedWithBacktick ? 13 /* NoSubstitutionTemplateLiteral */ : 16 /* TemplateTail */;
+                    resultingToken = startedWithBacktick ? 13 : 16;
                     break;
                 }
-                // '${'
-                if (currChar === 36 /* $ */ && pos + 1 < end && text.charCodeAt(pos + 1) === 123 /* openBrace */) {
+                if (currChar === 36 && pos + 1 < end && text.charCodeAt(pos + 1) === 123) {
                     contents += text.substring(start, pos);
                     pos += 2;
-                    resultingToken = startedWithBacktick ? 14 /* TemplateHead */ : 15 /* TemplateMiddle */;
+                    resultingToken = startedWithBacktick ? 14 : 15;
                     break;
                 }
-                // Escape character
-                if (currChar === 92 /* backslash */) {
+                if (currChar === 92) {
                     contents += text.substring(start, pos);
                     contents += scanEscapeSequence();
                     start = pos;
                     continue;
                 }
-                // Speculated ECMAScript 6 Spec 11.8.6.1:
-                // <CR><LF> and <CR> LineTerminatorSequences are normalized to <LF> for Template Values
-                if (currChar === 13 /* carriageReturn */) {
+                if (currChar === 13) {
                     contents += text.substring(start, pos);
                     pos++;
-                    if (pos < end && text.charCodeAt(pos) === 10 /* lineFeed */) {
+                    if (pos < end && text.charCodeAt(pos) === 10) {
                         pos++;
                     }
                     contents += "\n";
@@ -6568,53 +4587,47 @@ var ts;
             var ch = text.charCodeAt(pos);
             pos++;
             switch (ch) {
-                case 48 /* _0 */:
+                case 48:
                     return "\0";
-                case 98 /* b */:
+                case 98:
                     return "\b";
-                case 116 /* t */:
+                case 116:
                     return "\t";
-                case 110 /* n */:
+                case 110:
                     return "\n";
-                case 118 /* v */:
+                case 118:
                     return "\v";
-                case 102 /* f */:
+                case 102:
                     return "\f";
-                case 114 /* r */:
+                case 114:
                     return "\r";
-                case 39 /* singleQuote */:
+                case 39:
                     return "\'";
-                case 34 /* doubleQuote */:
+                case 34:
                     return "\"";
-                case 117 /* u */:
-                    // '\u{DDDDDDDD}'
-                    if (pos < end && text.charCodeAt(pos) === 123 /* openBrace */) {
-                        tokenFlags |= 8 /* ExtendedUnicodeEscape */;
+                case 117:
+                    if (pos < end && text.charCodeAt(pos) === 123) {
+                        tokenFlags |= 8;
                         pos++;
                         return scanExtendedUnicodeEscape();
                     }
-                    // '\uDDDD'
-                    return scanHexadecimalEscape(/*numDigits*/ 4);
-                case 120 /* x */:
-                    // '\xDD'
-                    return scanHexadecimalEscape(/*numDigits*/ 2);
-                // when encountering a LineContinuation (i.e. a backslash and a line terminator sequence),
-                // the line terminator is interpreted to be "the empty code unit sequence".
-                case 13 /* carriageReturn */:
-                    if (pos < end && text.charCodeAt(pos) === 10 /* lineFeed */) {
+                    return scanHexadecimalEscape(4);
+                case 120:
+                    return scanHexadecimalEscape(2);
+                case 13:
+                    if (pos < end && text.charCodeAt(pos) === 10) {
                         pos++;
                     }
-                // falls through
-                case 10 /* lineFeed */:
-                case 8232 /* lineSeparator */:
-                case 8233 /* paragraphSeparator */:
+                case 10:
+                case 8232:
+                case 8233:
                     return "";
                 default:
                     return String.fromCharCode(ch);
             }
         }
         function scanHexadecimalEscape(numDigits) {
-            var escapedValue = scanExactNumberOfHexDigits(numDigits, /*canHaveSeparators*/ false);
+            var escapedValue = scanExactNumberOfHexDigits(numDigits, false);
             if (escapedValue >= 0) {
                 return String.fromCharCode(escapedValue);
             }
@@ -6624,9 +4637,8 @@ var ts;
             }
         }
         function scanExtendedUnicodeEscape() {
-            var escapedValue = scanMinimumNumberOfHexDigits(1, /*canHaveSeparators*/ false);
+            var escapedValue = scanMinimumNumberOfHexDigits(1, false);
             var isInvalidExtendedEscape = false;
-            // Validate the value of the digit
             if (escapedValue < 0) {
                 error(ts.Diagnostics.Hexadecimal_digit_expected);
                 isInvalidExtendedEscape = true;
@@ -6639,8 +4651,7 @@ var ts;
                 error(ts.Diagnostics.Unexpected_end_of_text);
                 isInvalidExtendedEscape = true;
             }
-            else if (text.charCodeAt(pos) === 125 /* closeBrace */) {
-                // Only swallow the following character up if it's a '}'.
+            else if (text.charCodeAt(pos) === 125) {
                 pos++;
             }
             else {
@@ -6652,7 +4663,6 @@ var ts;
             }
             return utf16EncodeAsString(escapedValue);
         }
-        // Derived from the 10.1.1 UTF16Encoding of the ES6 Spec.
         function utf16EncodeAsString(codePoint) {
             ts.Debug.assert(0x0 <= codePoint && codePoint <= 0x10FFFF);
             if (codePoint <= 65535) {
@@ -6662,13 +4672,11 @@ var ts;
             var codeUnit2 = ((codePoint - 65536) % 1024) + 0xDC00;
             return String.fromCharCode(codeUnit1, codeUnit2);
         }
-        // Current character is known to be a backslash. Check for Unicode escape of the form '\uXXXX'
-        // and return code point value if valid Unicode escape is found. Otherwise return -1.
         function peekUnicodeEscape() {
-            if (pos + 5 < end && text.charCodeAt(pos + 1) === 117 /* u */) {
+            if (pos + 5 < end && text.charCodeAt(pos + 1) === 117) {
                 var start_1 = pos;
                 pos += 2;
-                var value = scanExactNumberOfHexDigits(4, /*canHaveSeparators*/ false);
+                var value = scanExactNumberOfHexDigits(4, false);
                 pos = start_1;
                 return value;
             }
@@ -6682,14 +4690,13 @@ var ts;
                 if (isIdentifierPart(ch, languageVersion)) {
                     pos++;
                 }
-                else if (ch === 92 /* backslash */) {
+                else if (ch === 92) {
                     ch = peekUnicodeEscape();
                     if (!(ch >= 0 && isIdentifierPart(ch, languageVersion))) {
                         break;
                     }
                     result += text.substring(start, pos);
                     result += String.fromCharCode(ch);
-                    // Valid Unicode escape is always six characters
                     pos += 6;
                     start = pos;
                 }
@@ -6701,32 +4708,28 @@ var ts;
             return result;
         }
         function getIdentifierToken() {
-            // Reserved words are between 2 and 11 characters long and start with a lowercase letter
             var len = tokenValue.length;
             if (len >= 2 && len <= 11) {
                 var ch = tokenValue.charCodeAt(0);
-                if (ch >= 97 /* a */ && ch <= 122 /* z */) {
+                if (ch >= 97 && ch <= 122) {
                     token = textToToken.get(tokenValue);
                     if (token !== undefined) {
                         return token;
                     }
                 }
             }
-            return token = 71 /* Identifier */;
+            return token = 71;
         }
         function scanBinaryOrOctalDigits(base) {
             ts.Debug.assert(base === 2 || base === 8, "Expected either base 2 or base 8");
             var value = 0;
-            // For counting number of digits; Valid binaryIntegerLiteral must have at least one binary digit following B or b.
-            // Similarly valid octalIntegerLiteral must have at least one octal digit following o or O.
             var numberOfDigits = 0;
             var separatorAllowed = false;
             var isPreviousTokenSeparator = false;
             while (true) {
                 var ch = text.charCodeAt(pos);
-                // Numeric separators are allowed anywhere within a numeric literal, except not at the beginning, or following another separator
-                if (ch === 95 /* _ */) {
-                    tokenFlags |= 512 /* ContainsSeparator */;
+                if (ch === 95) {
+                    tokenFlags |= 512;
                     if (separatorAllowed) {
                         separatorAllowed = false;
                         isPreviousTokenSeparator = true;
@@ -6741,7 +4744,7 @@ var ts;
                     continue;
                 }
                 separatorAllowed = true;
-                var valueOfCh = ch - 48 /* _0 */;
+                var valueOfCh = ch - 48;
                 if (!isDigit(ch) || valueOfCh >= base) {
                     break;
                 }
@@ -6750,12 +4753,10 @@ var ts;
                 numberOfDigits++;
                 isPreviousTokenSeparator = false;
             }
-            // Invalid binaryIntegerLiteral or octalIntegerLiteral
             if (numberOfDigits === 0) {
                 return -1;
             }
-            if (text.charCodeAt(pos - 1) === 95 /* _ */) {
-                // Literal ends with underscore - not allowed
+            if (text.charCodeAt(pos - 1) === 95) {
                 error(ts.Diagnostics.Numeric_separators_are_not_allowed_here, pos - 1, 1);
                 return value;
             }
@@ -6767,41 +4768,39 @@ var ts;
             while (true) {
                 tokenPos = pos;
                 if (pos >= end) {
-                    return token = 1 /* EndOfFileToken */;
+                    return token = 1;
                 }
                 var ch = text.charCodeAt(pos);
-                // Special handling for shebang
-                if (ch === 35 /* hash */ && pos === 0 && isShebangTrivia(text, pos)) {
+                if (ch === 35 && pos === 0 && isShebangTrivia(text, pos)) {
                     pos = scanShebangTrivia(text, pos);
                     if (skipTrivia) {
                         continue;
                     }
                     else {
-                        return token = 6 /* ShebangTrivia */;
+                        return token = 6;
                     }
                 }
                 switch (ch) {
-                    case 10 /* lineFeed */:
-                    case 13 /* carriageReturn */:
-                        tokenFlags |= 1 /* PrecedingLineBreak */;
+                    case 10:
+                    case 13:
+                        tokenFlags |= 1;
                         if (skipTrivia) {
                             pos++;
                             continue;
                         }
                         else {
-                            if (ch === 13 /* carriageReturn */ && pos + 1 < end && text.charCodeAt(pos + 1) === 10 /* lineFeed */) {
-                                // consume both CR and LF
+                            if (ch === 13 && pos + 1 < end && text.charCodeAt(pos + 1) === 10) {
                                 pos += 2;
                             }
                             else {
                                 pos++;
                             }
-                            return token = 4 /* NewLineTrivia */;
+                            return token = 4;
                         }
-                    case 9 /* tab */:
-                    case 11 /* verticalTab */:
-                    case 12 /* formFeed */:
-                    case 32 /* space */:
+                    case 9:
+                    case 11:
+                    case 12:
+                    case 32:
                         if (skipTrivia) {
                             pos++;
                             continue;
@@ -6810,90 +4809,89 @@ var ts;
                             while (pos < end && isWhiteSpaceSingleLine(text.charCodeAt(pos))) {
                                 pos++;
                             }
-                            return token = 5 /* WhitespaceTrivia */;
+                            return token = 5;
                         }
-                    case 33 /* exclamation */:
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            if (text.charCodeAt(pos + 2) === 61 /* equals */) {
-                                return pos += 3, token = 35 /* ExclamationEqualsEqualsToken */;
+                    case 33:
+                        if (text.charCodeAt(pos + 1) === 61) {
+                            if (text.charCodeAt(pos + 2) === 61) {
+                                return pos += 3, token = 35;
                             }
-                            return pos += 2, token = 33 /* ExclamationEqualsToken */;
+                            return pos += 2, token = 33;
                         }
                         pos++;
-                        return token = 51 /* ExclamationToken */;
-                    case 34 /* doubleQuote */:
-                    case 39 /* singleQuote */:
+                        return token = 51;
+                    case 34:
+                    case 39:
                         tokenValue = scanString();
-                        return token = 9 /* StringLiteral */;
-                    case 96 /* backtick */:
+                        return token = 9;
+                    case 96:
                         return token = scanTemplateAndSetTokenValue();
-                    case 37 /* percent */:
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            return pos += 2, token = 64 /* PercentEqualsToken */;
+                    case 37:
+                        if (text.charCodeAt(pos + 1) === 61) {
+                            return pos += 2, token = 64;
                         }
                         pos++;
-                        return token = 42 /* PercentToken */;
-                    case 38 /* ampersand */:
-                        if (text.charCodeAt(pos + 1) === 38 /* ampersand */) {
-                            return pos += 2, token = 53 /* AmpersandAmpersandToken */;
+                        return token = 42;
+                    case 38:
+                        if (text.charCodeAt(pos + 1) === 38) {
+                            return pos += 2, token = 53;
                         }
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            return pos += 2, token = 68 /* AmpersandEqualsToken */;
+                        if (text.charCodeAt(pos + 1) === 61) {
+                            return pos += 2, token = 68;
                         }
                         pos++;
-                        return token = 48 /* AmpersandToken */;
-                    case 40 /* openParen */:
+                        return token = 48;
+                    case 40:
                         pos++;
-                        return token = 19 /* OpenParenToken */;
-                    case 41 /* closeParen */:
+                        return token = 19;
+                    case 41:
                         pos++;
-                        return token = 20 /* CloseParenToken */;
-                    case 42 /* asterisk */:
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            return pos += 2, token = 61 /* AsteriskEqualsToken */;
-                        }
-                        if (text.charCodeAt(pos + 1) === 42 /* asterisk */) {
-                            if (text.charCodeAt(pos + 2) === 61 /* equals */) {
-                                return pos += 3, token = 62 /* AsteriskAsteriskEqualsToken */;
+                        return token = 20;
+                    case 42:
+                        if (text.charCodeAt(pos + 1) === 61) {
+                            return pos += 2, token = 61;
+                        }
+                        if (text.charCodeAt(pos + 1) === 42) {
+                            if (text.charCodeAt(pos + 2) === 61) {
+                                return pos += 3, token = 62;
                             }
-                            return pos += 2, token = 40 /* AsteriskAsteriskToken */;
+                            return pos += 2, token = 40;
                         }
                         pos++;
-                        return token = 39 /* AsteriskToken */;
-                    case 43 /* plus */:
-                        if (text.charCodeAt(pos + 1) === 43 /* plus */) {
-                            return pos += 2, token = 43 /* PlusPlusToken */;
+                        return token = 39;
+                    case 43:
+                        if (text.charCodeAt(pos + 1) === 43) {
+                            return pos += 2, token = 43;
                         }
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            return pos += 2, token = 59 /* PlusEqualsToken */;
+                        if (text.charCodeAt(pos + 1) === 61) {
+                            return pos += 2, token = 59;
                         }
                         pos++;
-                        return token = 37 /* PlusToken */;
-                    case 44 /* comma */:
+                        return token = 37;
+                    case 44:
                         pos++;
-                        return token = 26 /* CommaToken */;
-                    case 45 /* minus */:
-                        if (text.charCodeAt(pos + 1) === 45 /* minus */) {
-                            return pos += 2, token = 44 /* MinusMinusToken */;
+                        return token = 26;
+                    case 45:
+                        if (text.charCodeAt(pos + 1) === 45) {
+                            return pos += 2, token = 44;
                         }
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            return pos += 2, token = 60 /* MinusEqualsToken */;
+                        if (text.charCodeAt(pos + 1) === 61) {
+                            return pos += 2, token = 60;
                         }
                         pos++;
-                        return token = 38 /* MinusToken */;
-                    case 46 /* dot */:
+                        return token = 38;
+                    case 46:
                         if (isDigit(text.charCodeAt(pos + 1))) {
                             tokenValue = scanNumber();
-                            return token = 8 /* NumericLiteral */;
+                            return token = 8;
                         }
-                        if (text.charCodeAt(pos + 1) === 46 /* dot */ && text.charCodeAt(pos + 2) === 46 /* dot */) {
-                            return pos += 3, token = 24 /* DotDotDotToken */;
+                        if (text.charCodeAt(pos + 1) === 46 && text.charCodeAt(pos + 2) === 46) {
+                            return pos += 3, token = 24;
                         }
                         pos++;
-                        return token = 23 /* DotToken */;
-                    case 47 /* slash */:
-                        // Single-line comment
-                        if (text.charCodeAt(pos + 1) === 47 /* slash */) {
+                        return token = 23;
+                    case 47:
+                        if (text.charCodeAt(pos + 1) === 47) {
                             pos += 2;
                             while (pos < end) {
                                 if (isLineBreak(text.charCodeAt(pos))) {
@@ -6905,25 +4903,24 @@ var ts;
                                 continue;
                             }
                             else {
-                                return token = 2 /* SingleLineCommentTrivia */;
+                                return token = 2;
                             }
                         }
-                        // Multi-line comment
-                        if (text.charCodeAt(pos + 1) === 42 /* asterisk */) {
+                        if (text.charCodeAt(pos + 1) === 42) {
                             pos += 2;
-                            if (text.charCodeAt(pos) === 42 /* asterisk */ && text.charCodeAt(pos + 1) !== 47 /* slash */) {
-                                tokenFlags |= 2 /* PrecedingJSDocComment */;
+                            if (text.charCodeAt(pos) === 42 && text.charCodeAt(pos + 1) !== 47) {
+                                tokenFlags |= 2;
                             }
                             var commentClosed = false;
                             while (pos < end) {
                                 var ch_1 = text.charCodeAt(pos);
-                                if (ch_1 === 42 /* asterisk */ && text.charCodeAt(pos + 1) === 47 /* slash */) {
+                                if (ch_1 === 42 && text.charCodeAt(pos + 1) === 47) {
                                     pos += 2;
                                     commentClosed = true;
                                     break;
                                 }
                                 if (isLineBreak(ch_1)) {
-                                    tokenFlags |= 1 /* PrecedingLineBreak */;
+                                    tokenFlags |= 1;
                                 }
                                 pos++;
                             }
@@ -6935,182 +4932,177 @@ var ts;
                             }
                             else {
                                 if (!commentClosed) {
-                                    tokenFlags |= 4 /* Unterminated */;
+                                    tokenFlags |= 4;
                                 }
-                                return token = 3 /* MultiLineCommentTrivia */;
+                                return token = 3;
                             }
                         }
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            return pos += 2, token = 63 /* SlashEqualsToken */;
+                        if (text.charCodeAt(pos + 1) === 61) {
+                            return pos += 2, token = 63;
                         }
                         pos++;
-                        return token = 41 /* SlashToken */;
-                    case 48 /* _0 */:
-                        if (pos + 2 < end && (text.charCodeAt(pos + 1) === 88 /* X */ || text.charCodeAt(pos + 1) === 120 /* x */)) {
+                        return token = 41;
+                    case 48:
+                        if (pos + 2 < end && (text.charCodeAt(pos + 1) === 88 || text.charCodeAt(pos + 1) === 120)) {
                             pos += 2;
-                            var value = scanMinimumNumberOfHexDigits(1, /*canHaveSeparators*/ true);
+                            var value = scanMinimumNumberOfHexDigits(1, true);
                             if (value < 0) {
                                 error(ts.Diagnostics.Hexadecimal_digit_expected);
                                 value = 0;
                             }
                             tokenValue = "" + value;
-                            tokenFlags |= 64 /* HexSpecifier */;
-                            return token = 8 /* NumericLiteral */;
+                            tokenFlags |= 64;
+                            return token = 8;
                         }
-                        else if (pos + 2 < end && (text.charCodeAt(pos + 1) === 66 /* B */ || text.charCodeAt(pos + 1) === 98 /* b */)) {
+                        else if (pos + 2 < end && (text.charCodeAt(pos + 1) === 66 || text.charCodeAt(pos + 1) === 98)) {
                             pos += 2;
-                            var value = scanBinaryOrOctalDigits(/* base */ 2);
+                            var value = scanBinaryOrOctalDigits(2);
                             if (value < 0) {
                                 error(ts.Diagnostics.Binary_digit_expected);
                                 value = 0;
                             }
                             tokenValue = "" + value;
-                            tokenFlags |= 128 /* BinarySpecifier */;
-                            return token = 8 /* NumericLiteral */;
+                            tokenFlags |= 128;
+                            return token = 8;
                         }
-                        else if (pos + 2 < end && (text.charCodeAt(pos + 1) === 79 /* O */ || text.charCodeAt(pos + 1) === 111 /* o */)) {
+                        else if (pos + 2 < end && (text.charCodeAt(pos + 1) === 79 || text.charCodeAt(pos + 1) === 111)) {
                             pos += 2;
-                            var value = scanBinaryOrOctalDigits(/* base */ 8);
+                            var value = scanBinaryOrOctalDigits(8);
                             if (value < 0) {
                                 error(ts.Diagnostics.Octal_digit_expected);
                                 value = 0;
                             }
                             tokenValue = "" + value;
-                            tokenFlags |= 256 /* OctalSpecifier */;
-                            return token = 8 /* NumericLiteral */;
+                            tokenFlags |= 256;
+                            return token = 8;
                         }
-                        // Try to parse as an octal
                         if (pos + 1 < end && isOctalDigit(text.charCodeAt(pos + 1))) {
                             tokenValue = "" + scanOctalDigits();
-                            tokenFlags |= 32 /* Octal */;
-                            return token = 8 /* NumericLiteral */;
-                        }
-                    // This fall-through is a deviation from the EcmaScript grammar. The grammar says that a leading zero
-                    // can only be followed by an octal digit, a dot, or the end of the number literal. However, we are being
-                    // permissive and allowing decimal digits of the form 08* and 09* (which many browsers also do).
-                    // falls through
-                    case 49 /* _1 */:
-                    case 50 /* _2 */:
-                    case 51 /* _3 */:
-                    case 52 /* _4 */:
-                    case 53 /* _5 */:
-                    case 54 /* _6 */:
-                    case 55 /* _7 */:
-                    case 56 /* _8 */:
-                    case 57 /* _9 */:
+                            tokenFlags |= 32;
+                            return token = 8;
+                        }
+                    case 49:
+                    case 50:
+                    case 51:
+                    case 52:
+                    case 53:
+                    case 54:
+                    case 55:
+                    case 56:
+                    case 57:
                         tokenValue = scanNumber();
-                        return token = 8 /* NumericLiteral */;
-                    case 58 /* colon */:
+                        return token = 8;
+                    case 58:
                         pos++;
-                        return token = 56 /* ColonToken */;
-                    case 59 /* semicolon */:
+                        return token = 56;
+                    case 59:
                         pos++;
-                        return token = 25 /* SemicolonToken */;
-                    case 60 /* lessThan */:
+                        return token = 25;
+                    case 60:
                         if (isConflictMarkerTrivia(text, pos)) {
                             pos = scanConflictMarkerTrivia(text, pos, error);
                             if (skipTrivia) {
                                 continue;
                             }
                             else {
-                                return token = 7 /* ConflictMarkerTrivia */;
+                                return token = 7;
                             }
                         }
-                        if (text.charCodeAt(pos + 1) === 60 /* lessThan */) {
-                            if (text.charCodeAt(pos + 2) === 61 /* equals */) {
-                                return pos += 3, token = 65 /* LessThanLessThanEqualsToken */;
+                        if (text.charCodeAt(pos + 1) === 60) {
+                            if (text.charCodeAt(pos + 2) === 61) {
+                                return pos += 3, token = 65;
                             }
-                            return pos += 2, token = 45 /* LessThanLessThanToken */;
+                            return pos += 2, token = 45;
                         }
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            return pos += 2, token = 30 /* LessThanEqualsToken */;
+                        if (text.charCodeAt(pos + 1) === 61) {
+                            return pos += 2, token = 30;
                         }
-                        if (languageVariant === 1 /* JSX */ &&
-                            text.charCodeAt(pos + 1) === 47 /* slash */ &&
-                            text.charCodeAt(pos + 2) !== 42 /* asterisk */) {
-                            return pos += 2, token = 28 /* LessThanSlashToken */;
+                        if (languageVariant === 1 &&
+                            text.charCodeAt(pos + 1) === 47 &&
+                            text.charCodeAt(pos + 2) !== 42) {
+                            return pos += 2, token = 28;
                         }
                         pos++;
-                        return token = 27 /* LessThanToken */;
-                    case 61 /* equals */:
+                        return token = 27;
+                    case 61:
                         if (isConflictMarkerTrivia(text, pos)) {
                             pos = scanConflictMarkerTrivia(text, pos, error);
                             if (skipTrivia) {
                                 continue;
                             }
                             else {
-                                return token = 7 /* ConflictMarkerTrivia */;
+                                return token = 7;
                             }
                         }
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            if (text.charCodeAt(pos + 2) === 61 /* equals */) {
-                                return pos += 3, token = 34 /* EqualsEqualsEqualsToken */;
+                        if (text.charCodeAt(pos + 1) === 61) {
+                            if (text.charCodeAt(pos + 2) === 61) {
+                                return pos += 3, token = 34;
                             }
-                            return pos += 2, token = 32 /* EqualsEqualsToken */;
+                            return pos += 2, token = 32;
                         }
-                        if (text.charCodeAt(pos + 1) === 62 /* greaterThan */) {
-                            return pos += 2, token = 36 /* EqualsGreaterThanToken */;
+                        if (text.charCodeAt(pos + 1) === 62) {
+                            return pos += 2, token = 36;
                         }
                         pos++;
-                        return token = 58 /* EqualsToken */;
-                    case 62 /* greaterThan */:
+                        return token = 58;
+                    case 62:
                         if (isConflictMarkerTrivia(text, pos)) {
                             pos = scanConflictMarkerTrivia(text, pos, error);
                             if (skipTrivia) {
                                 continue;
                             }
                             else {
-                                return token = 7 /* ConflictMarkerTrivia */;
+                                return token = 7;
                             }
                         }
                         pos++;
-                        return token = 29 /* GreaterThanToken */;
-                    case 63 /* question */:
+                        return token = 29;
+                    case 63:
                         pos++;
-                        return token = 55 /* QuestionToken */;
-                    case 91 /* openBracket */:
+                        return token = 55;
+                    case 91:
                         pos++;
-                        return token = 21 /* OpenBracketToken */;
-                    case 93 /* closeBracket */:
+                        return token = 21;
+                    case 93:
                         pos++;
-                        return token = 22 /* CloseBracketToken */;
-                    case 94 /* caret */:
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            return pos += 2, token = 70 /* CaretEqualsToken */;
+                        return token = 22;
+                    case 94:
+                        if (text.charCodeAt(pos + 1) === 61) {
+                            return pos += 2, token = 70;
                         }
                         pos++;
-                        return token = 50 /* CaretToken */;
-                    case 123 /* openBrace */:
+                        return token = 50;
+                    case 123:
                         pos++;
-                        return token = 17 /* OpenBraceToken */;
-                    case 124 /* bar */:
+                        return token = 17;
+                    case 124:
                         if (isConflictMarkerTrivia(text, pos)) {
                             pos = scanConflictMarkerTrivia(text, pos, error);
                             if (skipTrivia) {
                                 continue;
                             }
                             else {
-                                return token = 7 /* ConflictMarkerTrivia */;
+                                return token = 7;
                             }
                         }
-                        if (text.charCodeAt(pos + 1) === 124 /* bar */) {
-                            return pos += 2, token = 54 /* BarBarToken */;
+                        if (text.charCodeAt(pos + 1) === 124) {
+                            return pos += 2, token = 54;
                         }
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            return pos += 2, token = 69 /* BarEqualsToken */;
+                        if (text.charCodeAt(pos + 1) === 61) {
+                            return pos += 2, token = 69;
                         }
                         pos++;
-                        return token = 49 /* BarToken */;
-                    case 125 /* closeBrace */:
+                        return token = 49;
+                    case 125:
                         pos++;
-                        return token = 18 /* CloseBraceToken */;
-                    case 126 /* tilde */:
+                        return token = 18;
+                    case 126:
                         pos++;
-                        return token = 52 /* TildeToken */;
-                    case 64 /* at */:
+                        return token = 52;
+                    case 64:
                         pos++;
-                        return token = 57 /* AtToken */;
-                    case 92 /* backslash */:
+                        return token = 57;
+                    case 92:
                         var cookedChar = peekUnicodeEscape();
                         if (cookedChar >= 0 && isIdentifierStart(cookedChar, languageVersion)) {
                             pos += 6;
@@ -7119,14 +5111,14 @@ var ts;
                         }
                         error(ts.Diagnostics.Invalid_character);
                         pos++;
-                        return token = 0 /* Unknown */;
+                        return token = 0;
                     default:
                         if (isIdentifierStart(ch, languageVersion)) {
                             pos++;
                             while (pos < end && isIdentifierPart(ch = text.charCodeAt(pos), languageVersion))
                                 pos++;
                             tokenValue = text.substring(tokenPos, pos);
-                            if (ch === 92 /* backslash */) {
+                            if (ch === 92) {
                                 tokenValue += scanIdentifierParts();
                             }
                             return token = getIdentifierToken();
@@ -7136,75 +5128,69 @@ var ts;
                             continue;
                         }
                         else if (isLineBreak(ch)) {
-                            tokenFlags |= 1 /* PrecedingLineBreak */;
+                            tokenFlags |= 1;
                             pos++;
                             continue;
                         }
                         error(ts.Diagnostics.Invalid_character);
                         pos++;
-                        return token = 0 /* Unknown */;
+                        return token = 0;
                 }
             }
         }
         function reScanGreaterToken() {
-            if (token === 29 /* GreaterThanToken */) {
-                if (text.charCodeAt(pos) === 62 /* greaterThan */) {
-                    if (text.charCodeAt(pos + 1) === 62 /* greaterThan */) {
-                        if (text.charCodeAt(pos + 2) === 61 /* equals */) {
-                            return pos += 3, token = 67 /* GreaterThanGreaterThanGreaterThanEqualsToken */;
+            if (token === 29) {
+                if (text.charCodeAt(pos) === 62) {
+                    if (text.charCodeAt(pos + 1) === 62) {
+                        if (text.charCodeAt(pos + 2) === 61) {
+                            return pos += 3, token = 67;
                         }
-                        return pos += 2, token = 47 /* GreaterThanGreaterThanGreaterThanToken */;
+                        return pos += 2, token = 47;
                     }
-                    if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                        return pos += 2, token = 66 /* GreaterThanGreaterThanEqualsToken */;
+                    if (text.charCodeAt(pos + 1) === 61) {
+                        return pos += 2, token = 66;
                     }
                     pos++;
-                    return token = 46 /* GreaterThanGreaterThanToken */;
+                    return token = 46;
                 }
-                if (text.charCodeAt(pos) === 61 /* equals */) {
+                if (text.charCodeAt(pos) === 61) {
                     pos++;
-                    return token = 31 /* GreaterThanEqualsToken */;
+                    return token = 31;
                 }
             }
             return token;
         }
         function reScanSlashToken() {
-            if (token === 41 /* SlashToken */ || token === 63 /* SlashEqualsToken */) {
+            if (token === 41 || token === 63) {
                 var p = tokenPos + 1;
                 var inEscape = false;
                 var inCharacterClass = false;
                 while (true) {
-                    // If we reach the end of a file, or hit a newline, then this is an unterminated
-                    // regex.  Report error and return what we have so far.
                     if (p >= end) {
-                        tokenFlags |= 4 /* Unterminated */;
+                        tokenFlags |= 4;
                         error(ts.Diagnostics.Unterminated_regular_expression_literal);
                         break;
                     }
                     var ch = text.charCodeAt(p);
                     if (isLineBreak(ch)) {
-                        tokenFlags |= 4 /* Unterminated */;
+                        tokenFlags |= 4;
                         error(ts.Diagnostics.Unterminated_regular_expression_literal);
                         break;
                     }
                     if (inEscape) {
-                        // Parsing an escape character;
-                        // reset the flag and just advance to the next char.
                         inEscape = false;
                     }
-                    else if (ch === 47 /* slash */ && !inCharacterClass) {
-                        // A slash within a character class is permissible,
-                        // but in general it signals the end of the regexp literal.
+                    else if (ch === 47 && !inCharacterClass) {
                         p++;
                         break;
                     }
-                    else if (ch === 91 /* openBracket */) {
+                    else if (ch === 91) {
                         inCharacterClass = true;
                     }
-                    else if (ch === 92 /* backslash */) {
+                    else if (ch === 92) {
                         inEscape = true;
                     }
-                    else if (ch === 93 /* closeBracket */) {
+                    else if (ch === 93) {
                         inCharacterClass = false;
                     }
                     p++;
@@ -7214,15 +5200,12 @@ var ts;
                 }
                 pos = p;
                 tokenValue = text.substring(tokenPos, pos);
-                token = 12 /* RegularExpressionLiteral */;
+                token = 12;
             }
             return token;
         }
-        /**
-         * Unconditionally back up and scan a template expression portion.
-         */
         function reScanTemplateToken() {
-            ts.Debug.assert(token === 18 /* CloseBraceToken */, "'reScanTemplateToken' should only be called on a '}'");
+            ts.Debug.assert(token === 18, "'reScanTemplateToken' should only be called on a '}'");
             pos = tokenPos;
             return token = scanTemplateAndSetTokenValue();
         }
@@ -7233,43 +5216,34 @@ var ts;
         function scanJsxToken() {
             startPos = tokenPos = pos;
             if (pos >= end) {
-                return token = 1 /* EndOfFileToken */;
+                return token = 1;
             }
             var char = text.charCodeAt(pos);
-            if (char === 60 /* lessThan */) {
-                if (text.charCodeAt(pos + 1) === 47 /* slash */) {
+            if (char === 60) {
+                if (text.charCodeAt(pos + 1) === 47) {
                     pos += 2;
-                    return token = 28 /* LessThanSlashToken */;
+                    return token = 28;
                 }
                 pos++;
-                return token = 27 /* LessThanToken */;
+                return token = 27;
             }
-            if (char === 123 /* openBrace */) {
+            if (char === 123) {
                 pos++;
-                return token = 17 /* OpenBraceToken */;
+                return token = 17;
             }
-            // First non-whitespace character on this line.
             var firstNonWhitespace = 0;
-            // These initial values are special because the first line is:
-            // firstNonWhitespace = 0 to indicate that we want leading whitspace,
             while (pos < end) {
                 char = text.charCodeAt(pos);
-                if (char === 123 /* openBrace */) {
+                if (char === 123) {
                     break;
                 }
-                if (char === 60 /* lessThan */) {
+                if (char === 60) {
                     if (isConflictMarkerTrivia(text, pos)) {
                         pos = scanConflictMarkerTrivia(text, pos, error);
-                        return token = 7 /* ConflictMarkerTrivia */;
+                        return token = 7;
                     }
                     break;
                 }
-                // FirstNonWhitespace is 0, then we only see whitespaces so far. If we see a linebreak, we want to ignore that whitespaces.
-                // i.e (- : whitespace)
-                //      <div>----
-                //      </div> becomes <div></div>
-                //
-                //      <div>----</div> becomes <div>----</div>
                 if (isLineBreak(char) && firstNonWhitespace === 0) {
                     firstNonWhitespace = -1;
                 }
@@ -7278,16 +5252,14 @@ var ts;
                 }
                 pos++;
             }
-            return firstNonWhitespace === -1 ? 11 /* JsxTextAllWhiteSpaces */ : 10 /* JsxText */;
+            return firstNonWhitespace === -1 ? 11 : 10;
         }
-        // Scans a JSX identifier; these differ from normal identifiers in that
-        // they allow dashes
         function scanJsxIdentifier() {
             if (tokenIsIdentifierOrKeyword(token)) {
                 var firstCharPosition = pos;
                 while (pos < end) {
                     var ch = text.charCodeAt(pos);
-                    if (ch === 45 /* minus */ || ((firstCharPosition === pos) ? isIdentifierStart(ch, languageVersion) : isIdentifierPart(ch, languageVersion))) {
+                    if (ch === 45 || ((firstCharPosition === pos) ? isIdentifierStart(ch, languageVersion) : isIdentifierPart(ch, languageVersion))) {
                         pos++;
                     }
                     else {
@@ -7301,71 +5273,70 @@ var ts;
         function scanJsxAttributeValue() {
             startPos = pos;
             switch (text.charCodeAt(pos)) {
-                case 34 /* doubleQuote */:
-                case 39 /* singleQuote */:
-                    tokenValue = scanString(/*jsxAttributeString*/ true);
-                    return token = 9 /* StringLiteral */;
+                case 34:
+                case 39:
+                    tokenValue = scanString(true);
+                    return token = 9;
                 default:
-                    // If this scans anything other than `{`, it's a parse error.
                     return scan();
             }
         }
         function scanJSDocToken() {
             startPos = tokenPos = pos;
             if (pos >= end) {
-                return token = 1 /* EndOfFileToken */;
+                return token = 1;
             }
             var ch = text.charCodeAt(pos);
             pos++;
             switch (ch) {
-                case 9 /* tab */:
-                case 11 /* verticalTab */:
-                case 12 /* formFeed */:
-                case 32 /* space */:
+                case 9:
+                case 11:
+                case 12:
+                case 32:
                     while (pos < end && isWhiteSpaceSingleLine(text.charCodeAt(pos))) {
                         pos++;
                     }
-                    return token = 5 /* WhitespaceTrivia */;
-                case 64 /* at */:
-                    return token = 57 /* AtToken */;
-                case 10 /* lineFeed */:
-                case 13 /* carriageReturn */:
-                    return token = 4 /* NewLineTrivia */;
-                case 42 /* asterisk */:
-                    return token = 39 /* AsteriskToken */;
-                case 123 /* openBrace */:
-                    return token = 17 /* OpenBraceToken */;
-                case 125 /* closeBrace */:
-                    return token = 18 /* CloseBraceToken */;
-                case 91 /* openBracket */:
-                    return token = 21 /* OpenBracketToken */;
-                case 93 /* closeBracket */:
-                    return token = 22 /* CloseBracketToken */;
-                case 60 /* lessThan */:
-                    return token = 27 /* LessThanToken */;
-                case 61 /* equals */:
-                    return token = 58 /* EqualsToken */;
-                case 44 /* comma */:
-                    return token = 26 /* CommaToken */;
-                case 46 /* dot */:
-                    return token = 23 /* DotToken */;
-                case 96 /* backtick */:
-                    while (pos < end && text.charCodeAt(pos) !== 96 /* backtick */) {
+                    return token = 5;
+                case 64:
+                    return token = 57;
+                case 10:
+                case 13:
+                    return token = 4;
+                case 42:
+                    return token = 39;
+                case 123:
+                    return token = 17;
+                case 125:
+                    return token = 18;
+                case 91:
+                    return token = 21;
+                case 93:
+                    return token = 22;
+                case 60:
+                    return token = 27;
+                case 61:
+                    return token = 58;
+                case 44:
+                    return token = 26;
+                case 46:
+                    return token = 23;
+                case 96:
+                    while (pos < end && text.charCodeAt(pos) !== 96) {
                         pos++;
                     }
                     tokenValue = text.substring(tokenPos + 1, pos);
                     pos++;
-                    return token = 13 /* NoSubstitutionTemplateLiteral */;
+                    return token = 13;
             }
-            if (isIdentifierStart(ch, 6 /* Latest */)) {
-                while (isIdentifierPart(text.charCodeAt(pos), 6 /* Latest */) && pos < end) {
+            if (isIdentifierStart(ch, 6)) {
+                while (isIdentifierPart(text.charCodeAt(pos), 6) && pos < end) {
                     pos++;
                 }
                 tokenValue = text.substring(tokenPos, pos);
-                return token = 71 /* Identifier */;
+                return token = 71;
             }
             else {
-                return token = 0 /* Unknown */;
+                return token = 0;
             }
         }
         function speculationHelper(callback, isLookahead) {
@@ -7376,8 +5347,6 @@ var ts;
             var saveTokenValue = tokenValue;
             var saveTokenFlags = tokenFlags;
             var result = callback();
-            // If our callback returned something 'falsy' or we're just looking ahead,
-            // then unconditionally restore us to where we were.
             if (!result || isLookahead) {
                 pos = savePos;
                 startPos = saveStartPos;
@@ -7408,10 +5377,10 @@ var ts;
             return result;
         }
         function lookAhead(callback) {
-            return speculationHelper(callback, /*isLookahead*/ true);
+            return speculationHelper(callback, true);
         }
         function tryScan(callback) {
-            return speculationHelper(callback, /*isLookahead*/ false);
+            return speculationHelper(callback, false);
         }
         function getText() {
             return text;
@@ -7435,25 +5404,16 @@ var ts;
             pos = textPos;
             startPos = textPos;
             tokenPos = textPos;
-            token = 0 /* Unknown */;
+            token = 0;
             tokenValue = undefined;
             tokenFlags = 0;
         }
     }
     ts.createScanner = createScanner;
 })(ts || (ts = {}));
-/** Non-internal stuff goes here */
 var ts;
 (function (ts) {
-    ts.emptyArray = [];
-    function closeFileWatcher(watcher) {
-        watcher.close();
-    }
-    ts.closeFileWatcher = closeFileWatcher;
     function isExternalModuleNameRelative(moduleName) {
-        // TypeScript 1.0 spec (April 2014): 11.2.1
-        // An external module name is "relative" if the first term is "." or "..".
-        // Update: We also consider a path like `C:\foo.ts` "relative" because we do not search for it in `node_modules` or treat it as an ambient module.
         return ts.pathIsRelative(moduleName) || ts.isRootedDiskPath(moduleName);
     }
     ts.isExternalModuleNameRelative = isExternalModuleNameRelative;
@@ -7461,20 +5421,9 @@ var ts;
         return ts.sortAndDeduplicate(diagnostics, ts.compareDiagnostics);
     }
     ts.sortAndDeduplicateDiagnostics = sortAndDeduplicateDiagnostics;
-    function toPath(fileName, basePath, getCanonicalFileName) {
-        var nonCanonicalizedPath = ts.isRootedDiskPath(fileName)
-            ? ts.normalizePath(fileName)
-            : ts.getNormalizedAbsolutePath(fileName, basePath);
-        return getCanonicalFileName(nonCanonicalizedPath);
-    }
-    ts.toPath = toPath;
-    function hasEntries(map) {
-        return !!map && !!map.size;
-    }
-    ts.hasEntries = hasEntries;
 })(ts || (ts = {}));
-/* @internal */
 (function (ts) {
+    ts.emptyArray = [];
     ts.resolvingEmptyArray = [];
     ts.emptyMap = ts.createMap();
     ts.emptyUnderscoreEscapedMap = ts.emptyMap;
@@ -7492,11 +5441,14 @@ var ts;
         return undefined;
     }
     ts.getDeclarationOfKind = getDeclarationOfKind;
-    /** Create a new escaped identifier map. */
     function createUnderscoreEscapedMap() {
         return new ts.MapCtr();
     }
     ts.createUnderscoreEscapedMap = createUnderscoreEscapedMap;
+    function hasEntries(map) {
+        return !!map && !!map.size;
+    }
+    ts.hasEntries = hasEntries;
     function createSymbolTable(symbols) {
         var result = ts.createMap();
         if (symbols) {
@@ -7531,8 +5483,6 @@ var ts;
             getColumn: function () { return 0; },
             getIndent: function () { return 0; },
             isAtStartOfLine: function () { return false; },
-            // Completely ignore indentation for string writers.  And map newlines to
-            // a single space.
             writeLine: function () { return str += " "; },
             increaseIndent: ts.noop,
             decreaseIndent: ts.noop,
@@ -7543,6 +5493,13 @@ var ts;
             reportPrivateInBaseOfClassExpression: ts.noop,
         };
     }
+    function toPath(fileName, basePath, getCanonicalFileName) {
+        var nonCanonicalizedPath = ts.isRootedDiskPath(fileName)
+            ? ts.normalizePath(fileName)
+            : ts.getNormalizedAbsolutePath(fileName, basePath);
+        return getCanonicalFileName(nonCanonicalizedPath);
+    }
+    ts.toPath = toPath;
     function changesAffectModuleResolution(oldOptions, newOptions) {
         return !oldOptions ||
             (oldOptions.module !== newOptions.module) ||
@@ -7687,31 +5644,23 @@ var ts;
         return false;
     }
     ts.hasChangesInResolutions = hasChangesInResolutions;
-    // Returns true if this node contains a parse error anywhere underneath it.
     function containsParseError(node) {
         aggregateChildData(node);
-        return (node.flags & 131072 /* ThisNodeOrAnySubNodesHasError */) !== 0;
+        return (node.flags & 131072) !== 0;
     }
     ts.containsParseError = containsParseError;
     function aggregateChildData(node) {
-        if (!(node.flags & 262144 /* HasAggregatedChildData */)) {
-            // A node is considered to contain a parse error if:
-            //  a) the parser explicitly marked that it had an error
-            //  b) any of it's children reported that it had an error.
-            var thisNodeOrAnySubNodesHasError = ((node.flags & 32768 /* ThisNodeHasError */) !== 0) ||
+        if (!(node.flags & 262144)) {
+            var thisNodeOrAnySubNodesHasError = ((node.flags & 32768) !== 0) ||
                 ts.forEachChild(node, containsParseError);
-            // If so, mark ourselves accordingly.
             if (thisNodeOrAnySubNodesHasError) {
-                node.flags |= 131072 /* ThisNodeOrAnySubNodesHasError */;
+                node.flags |= 131072;
             }
-            // Also mark that we've propagated the child information to this node.  This way we can
-            // always consult the bit directly on this node without needing to check its children
-            // again.
-            node.flags |= 262144 /* HasAggregatedChildData */;
+            node.flags |= 262144;
         }
     }
     function getSourceFileOfNode(node) {
-        while (node && node.kind !== 274 /* SourceFile */) {
+        while (node && node.kind !== 274) {
             node = node.parent;
         }
         return node;
@@ -7719,11 +5668,11 @@ var ts;
     ts.getSourceFileOfNode = getSourceFileOfNode;
     function isStatementWithLocals(node) {
         switch (node.kind) {
-            case 213 /* Block */:
-            case 241 /* CaseBlock */:
-            case 220 /* ForStatement */:
-            case 221 /* ForInStatement */:
-            case 222 /* ForOfStatement */:
+            case 213:
+            case 241:
+            case 220:
+            case 221:
+            case 222:
                 return true;
         }
         return false;
@@ -7734,7 +5683,6 @@ var ts;
         return ts.getLineStarts(sourceFile)[line];
     }
     ts.getStartPositionOfLine = getStartPositionOfLine;
-    // This is a useful function for debugging purposes.
     function nodePosToString(node) {
         var file = getSourceFileOfNode(node);
         var loc = ts.getLineAndCharacterOfPosition(file, node.pos);
@@ -7747,19 +5695,12 @@ var ts;
         var lineIndex = line;
         var sourceText = sourceFile.text;
         if (lineIndex + 1 === lineStarts.length) {
-            // last line - return EOF
             return sourceText.length - 1;
         }
         else {
-            // current line start
             var start = lineStarts[lineIndex];
-            // take the start position of the next line - 1 = it should be some line break
             var pos = lineStarts[lineIndex + 1] - 1;
             ts.Debug.assert(ts.isLineBreak(sourceText.charCodeAt(pos)));
-            // walk backwards skipping line breaks, stop the the beginning of current line.
-            // i.e:
-            // <some text>
-            // $ <- end of line for this position should match the start position
             while (start <= pos && ts.isLineBreak(sourceText.charCodeAt(pos))) {
                 pos--;
             }
@@ -7767,45 +5708,21 @@ var ts;
         }
     }
     ts.getEndLinePosition = getEndLinePosition;
-    /**
-     * Returns a value indicating whether a name is unique globally or within the current file.
-     * Note: This does not consider whether a name appears as a free identifier or not, so at the expression `x.y` this includes both `x` and `y`.
-     */
     function isFileLevelUniqueName(sourceFile, name, hasGlobalName) {
         return !(hasGlobalName && hasGlobalName(name)) && !sourceFile.identifiers.has(name);
     }
     ts.isFileLevelUniqueName = isFileLevelUniqueName;
-    // Returns true if this node is missing from the actual source code. A 'missing' node is different
-    // from 'undefined/defined'. When a node is undefined (which can happen for optional nodes
-    // in the tree), it is definitely missing. However, a node may be defined, but still be
-    // missing.  This happens whenever the parser knows it needs to parse something, but can't
-    // get anything in the source code that it expects at that location. For example:
-    //
-    //          let a: ;
-    //
-    // Here, the Type in the Type-Annotation is not-optional (as there is a colon in the source
-    // code). So the parser will attempt to parse out a type, and will create an actual node.
-    // However, this node will be 'missing' in the sense that no actual source-code/tokens are
-    // contained within it.
     function nodeIsMissing(node) {
         if (node === undefined) {
             return true;
         }
-        return node.pos === node.end && node.pos >= 0 && node.kind !== 1 /* EndOfFileToken */;
+        return node.pos === node.end && node.pos >= 0 && node.kind !== 1;
     }
     ts.nodeIsMissing = nodeIsMissing;
     function nodeIsPresent(node) {
         return !nodeIsMissing(node);
     }
     ts.nodeIsPresent = nodeIsPresent;
-    /**
-     * Appends a range of value to begin of an array, returning the array.
-     *
-     * @param to The array to which `value` is to be appended. If `to` is `undefined`, a new array
-     * is created if `value` was appended.
-     * @param from The values to append to the array. If `from` is `undefined`, nothing is
-     * appended. If an element of `from` is `undefined`, that element is not appended.
-     */
     function prependStatements(to, from) {
         if (from === undefined || from.length === 0)
             return to;
@@ -7819,17 +5736,10 @@ var ts;
         return to;
     }
     ts.prependStatements = prependStatements;
-    /**
-     * Determine if the given comment is a triple-slash
-     *
-     * @return true if the comment is a triple-slash comment else false
-     */
     function isRecognizedTripleSlashComment(text, commentPos, commentEnd) {
-        // Verify this is /// comment, but do the regexp match only when we first can find /// in the comment text
-        // so that we don't end up computing comment string and doing match for all // comments
-        if (text.charCodeAt(commentPos + 1) === 47 /* slash */ &&
+        if (text.charCodeAt(commentPos + 1) === 47 &&
             commentPos + 2 < commentEnd &&
-            text.charCodeAt(commentPos + 2) === 47 /* slash */) {
+            text.charCodeAt(commentPos + 2) === 47) {
             var textSubStr = text.substring(commentPos, commentEnd);
             return textSubStr.match(ts.fullTripleSlashReferencePathRegEx) ||
                 textSubStr.match(ts.fullTripleSlashAMDReferencePathRegEx) ||
@@ -7841,27 +5751,21 @@ var ts;
     }
     ts.isRecognizedTripleSlashComment = isRecognizedTripleSlashComment;
     function isPinnedComment(text, start) {
-        return text.charCodeAt(start + 1) === 42 /* asterisk */ &&
-            text.charCodeAt(start + 2) === 33 /* exclamation */;
+        return text.charCodeAt(start + 1) === 42 &&
+            text.charCodeAt(start + 2) === 33;
     }
     ts.isPinnedComment = isPinnedComment;
     function getTokenPosOfNode(node, sourceFile, includeJsDoc) {
-        // With nodes that have no width (i.e. 'Missing' nodes), we actually *don't*
-        // want to skip trivia because this will launch us forward to the next token.
         if (nodeIsMissing(node)) {
             return node.pos;
         }
         if (ts.isJSDocNode(node)) {
-            return ts.skipTrivia((sourceFile || getSourceFileOfNode(node)).text, node.pos, /*stopAfterLineBreak*/ false, /*stopAtComments*/ true);
+            return ts.skipTrivia((sourceFile || getSourceFileOfNode(node)).text, node.pos, false, true);
         }
         if (includeJsDoc && ts.hasJSDocNodes(node)) {
             return getTokenPosOfNode(node.jsDoc[0]);
         }
-        // For a syntax list, it is possible that one of its children has JSDocComment nodes, while
-        // the syntax list itself considers them as normal trivia. Therefore if we simply skip
-        // trivia for the list, we may have skipped the JSDocComment as well. So we should process its
-        // first child to determine the actual position of its first token.
-        if (node.kind === 299 /* SyntaxList */ && node._children.length > 0) {
+        if (node.kind === 299 && node._children.length > 0) {
             return getTokenPosOfNode(node._children[0], sourceFile, includeJsDoc);
         }
         return ts.skipTrivia((sourceFile || getSourceFileOfNode(node)).text, node.pos);
@@ -7895,51 +5799,38 @@ var ts;
     function getPos(range) {
         return range.pos;
     }
-    /**
-     * Note: it is expected that the `nodeArray` and the `node` are within the same file.
-     * For example, searching for a `SourceFile` in a `SourceFile[]` wouldn't work.
-     */
     function indexOfNode(nodeArray, node) {
         return ts.binarySearch(nodeArray, node, getPos, ts.compareValues);
     }
     ts.indexOfNode = indexOfNode;
-    /**
-     * Gets flags that control emit behavior of a node.
-     */
     function getEmitFlags(node) {
         var emitNode = node.emitNode;
         return emitNode && emitNode.flags || 0;
     }
     ts.getEmitFlags = getEmitFlags;
     function getLiteralText(node, sourceFile) {
-        // If we don't need to downlevel and we can reach the original source text using
-        // the node's parent reference, then simply get the text as it was originally written.
-        if (!nodeIsSynthesized(node) && node.parent && !(ts.isNumericLiteral(node) && node.numericLiteralFlags & 512 /* ContainsSeparator */)) {
+        if (!nodeIsSynthesized(node) && node.parent && !(ts.isNumericLiteral(node) && node.numericLiteralFlags & 512)) {
             return getSourceTextOfNodeFromSourceFile(sourceFile, node);
         }
-        var escapeText = getEmitFlags(node) & 16777216 /* NoAsciiEscaping */ ? escapeString : escapeNonAsciiString;
-        // If we can't reach the original source text, use the canonical form if it's a number,
-        // or a (possibly escaped) quoted form of the original text if it's string-like.
+        var escapeText = getEmitFlags(node) & 16777216 ? escapeString : escapeNonAsciiString;
         switch (node.kind) {
-            case 9 /* StringLiteral */:
+            case 9:
                 if (node.singleQuote) {
-                    return "'" + escapeText(node.text, 39 /* singleQuote */) + "'";
+                    return "'" + escapeText(node.text, 39) + "'";
                 }
                 else {
-                    return '"' + escapeText(node.text, 34 /* doubleQuote */) + '"';
-                }
-            case 13 /* NoSubstitutionTemplateLiteral */:
-                return "`" + escapeText(node.text, 96 /* backtick */) + "`";
-            case 14 /* TemplateHead */:
-                // tslint:disable-next-line no-invalid-template-strings
-                return "`" + escapeText(node.text, 96 /* backtick */) + "${";
-            case 15 /* TemplateMiddle */:
-                // tslint:disable-next-line no-invalid-template-strings
-                return "}" + escapeText(node.text, 96 /* backtick */) + "${";
-            case 16 /* TemplateTail */:
-                return "}" + escapeText(node.text, 96 /* backtick */) + "`";
-            case 8 /* NumericLiteral */:
-            case 12 /* RegularExpressionLiteral */:
+                    return '"' + escapeText(node.text, 34) + '"';
+                }
+            case 13:
+                return "`" + escapeText(node.text, 96) + "`";
+            case 14:
+                return "`" + escapeText(node.text, 96) + "${";
+            case 15:
+                return "}" + escapeText(node.text, 96) + "${";
+            case 16:
+                return "}" + escapeText(node.text, 96) + "`";
+            case 8:
+            case 12:
                 return node.text;
         }
         return ts.Debug.fail("Literal kind '" + node.kind + "' not accounted for.");
@@ -7949,74 +5840,59 @@ var ts;
         return ts.isString(value) ? '"' + escapeNonAsciiString(value) + '"' : "" + value;
     }
     ts.getTextOfConstantValue = getTextOfConstantValue;
-    // Add an extra underscore to identifiers that start with two underscores to avoid issues with magic names like '__proto__'
     function escapeLeadingUnderscores(identifier) {
-        return (identifier.length >= 2 && identifier.charCodeAt(0) === 95 /* _ */ && identifier.charCodeAt(1) === 95 /* _ */ ? "_" + identifier : identifier);
+        return (identifier.length >= 2 && identifier.charCodeAt(0) === 95 && identifier.charCodeAt(1) === 95 ? "_" + identifier : identifier);
     }
     ts.escapeLeadingUnderscores = escapeLeadingUnderscores;
-    /**
-     * @deprecated Use `id.escapedText` to get the escaped text of an Identifier.
-     * @param identifier The identifier to escape
-     */
     function escapeIdentifier(identifier) {
         return identifier;
     }
     ts.escapeIdentifier = escapeIdentifier;
-    // Make an identifier from an external module name by extracting the string after the last "/" and replacing
-    // all non-alphanumeric characters with underscores
     function makeIdentifierFromModuleName(moduleName) {
         return ts.getBaseFileName(moduleName).replace(/^(\d)/, "_$1").replace(/\W/g, "_");
     }
     ts.makeIdentifierFromModuleName = makeIdentifierFromModuleName;
     function isBlockOrCatchScoped(declaration) {
-        return (ts.getCombinedNodeFlags(declaration) & 3 /* BlockScoped */) !== 0 ||
+        return (ts.getCombinedNodeFlags(declaration) & 3) !== 0 ||
             isCatchClauseVariableDeclarationOrBindingElement(declaration);
     }
     ts.isBlockOrCatchScoped = isBlockOrCatchScoped;
     function isCatchClauseVariableDeclarationOrBindingElement(declaration) {
         var node = getRootDeclaration(declaration);
-        return node.kind === 232 /* VariableDeclaration */ && node.parent.kind === 269 /* CatchClause */;
+        return node.kind === 232 && node.parent.kind === 269;
     }
     ts.isCatchClauseVariableDeclarationOrBindingElement = isCatchClauseVariableDeclarationOrBindingElement;
     function isAmbientModule(node) {
-        return ts.isModuleDeclaration(node) && (node.name.kind === 9 /* StringLiteral */ || isGlobalScopeAugmentation(node));
+        return ts.isModuleDeclaration(node) && (node.name.kind === 9 || isGlobalScopeAugmentation(node));
     }
     ts.isAmbientModule = isAmbientModule;
     function isModuleWithStringLiteralName(node) {
-        return ts.isModuleDeclaration(node) && node.name.kind === 9 /* StringLiteral */;
+        return ts.isModuleDeclaration(node) && node.name.kind === 9;
     }
     ts.isModuleWithStringLiteralName = isModuleWithStringLiteralName;
     function isNonGlobalAmbientModule(node) {
         return ts.isModuleDeclaration(node) && ts.isStringLiteral(node.name);
     }
     ts.isNonGlobalAmbientModule = isNonGlobalAmbientModule;
-    /**
-     * An effective module (namespace) declaration is either
-     * 1. An actual declaration: namespace X { ... }
-     * 2. A Javascript declaration, which is:
-     *    An identifier in a nested property access expression: Y in `X.Y.Z = { ... }`
-     */
     function isEffectiveModuleDeclaration(node) {
         return ts.isModuleDeclaration(node) || ts.isIdentifier(node);
     }
     ts.isEffectiveModuleDeclaration = isEffectiveModuleDeclaration;
-    /** Given a symbol for a module, checks that it is a shorthand ambient module. */
     function isShorthandAmbientModuleSymbol(moduleSymbol) {
         return isShorthandAmbientModule(moduleSymbol.valueDeclaration);
     }
     ts.isShorthandAmbientModuleSymbol = isShorthandAmbientModuleSymbol;
     function isShorthandAmbientModule(node) {
-        // The only kind of module that can be missing a body is a shorthand ambient module.
-        return node && node.kind === 239 /* ModuleDeclaration */ && (!node.body);
+        return node && node.kind === 239 && (!node.body);
     }
     function isBlockScopedContainerTopLevel(node) {
-        return node.kind === 274 /* SourceFile */ ||
-            node.kind === 239 /* ModuleDeclaration */ ||
+        return node.kind === 274 ||
+            node.kind === 239 ||
             ts.isFunctionLike(node);
     }
     ts.isBlockScopedContainerTopLevel = isBlockScopedContainerTopLevel;
     function isGlobalScopeAugmentation(module) {
-        return !!(module.flags & 512 /* GlobalAugmentation */);
+        return !!(module.flags & 512);
     }
     ts.isGlobalScopeAugmentation = isGlobalScopeAugmentation;
     function isExternalModuleAugmentation(node) {
@@ -8024,13 +5900,10 @@ var ts;
     }
     ts.isExternalModuleAugmentation = isExternalModuleAugmentation;
     function isModuleAugmentationExternal(node) {
-        // external module augmentation is a ambient module declaration that is either:
-        // - defined in the top level scope and source file is an external module
-        // - defined inside ambient module declaration located in the top level scope and source file not an external module
         switch (node.parent.kind) {
-            case 274 /* SourceFile */:
+            case 274:
                 return ts.isExternalModule(node.parent);
-            case 240 /* ModuleBlock */:
+            case 240:
                 return isAmbientModule(node.parent.parent) && ts.isSourceFile(node.parent.parent.parent) && !ts.isExternalModule(node.parent.parent.parent);
         }
         return false;
@@ -8042,24 +5915,22 @@ var ts;
     ts.isEffectiveExternalModule = isEffectiveExternalModule;
     function isBlockScope(node, parentNode) {
         switch (node.kind) {
-            case 274 /* SourceFile */:
-            case 241 /* CaseBlock */:
-            case 269 /* CatchClause */:
-            case 239 /* ModuleDeclaration */:
-            case 220 /* ForStatement */:
-            case 221 /* ForInStatement */:
-            case 222 /* ForOfStatement */:
-            case 155 /* Constructor */:
-            case 154 /* MethodDeclaration */:
-            case 156 /* GetAccessor */:
-            case 157 /* SetAccessor */:
-            case 234 /* FunctionDeclaration */:
-            case 192 /* FunctionExpression */:
-            case 193 /* ArrowFunction */:
+            case 274:
+            case 241:
+            case 269:
+            case 239:
+            case 220:
+            case 221:
+            case 222:
+            case 155:
+            case 154:
+            case 156:
+            case 157:
+            case 234:
+            case 192:
+            case 193:
                 return true;
-            case 213 /* Block */:
-                // function block is not considered block-scope container
-                // see comment in binder.ts: bind(...), case for SyntaxKind.Block
+            case 213:
                 return !ts.isFunctionLike(parentNode);
         }
         return false;
@@ -8067,28 +5938,28 @@ var ts;
     ts.isBlockScope = isBlockScope;
     function isDeclarationWithTypeParameters(node) {
         switch (node.kind) {
-            case 158 /* CallSignature */:
-            case 159 /* ConstructSignature */:
-            case 153 /* MethodSignature */:
-            case 160 /* IndexSignature */:
-            case 163 /* FunctionType */:
-            case 164 /* ConstructorType */:
-            case 284 /* JSDocFunctionType */:
-            case 235 /* ClassDeclaration */:
-            case 205 /* ClassExpression */:
-            case 236 /* InterfaceDeclaration */:
-            case 237 /* TypeAliasDeclaration */:
-            case 296 /* JSDocTemplateTag */:
-            case 234 /* FunctionDeclaration */:
-            case 154 /* MethodDeclaration */:
-            case 155 /* Constructor */:
-            case 156 /* GetAccessor */:
-            case 157 /* SetAccessor */:
-            case 192 /* FunctionExpression */:
-            case 193 /* ArrowFunction */:
-            case 292 /* JSDocCallbackTag */:
-            case 297 /* JSDocTypedefTag */:
-            case 288 /* JSDocSignature */:
+            case 158:
+            case 159:
+            case 153:
+            case 160:
+            case 163:
+            case 164:
+            case 284:
+            case 235:
+            case 205:
+            case 236:
+            case 237:
+            case 296:
+            case 234:
+            case 154:
+            case 155:
+            case 156:
+            case 157:
+            case 192:
+            case 193:
+            case 292:
+            case 297:
+            case 288:
                 return true;
             default:
                 ts.assertTypeIsNever(node);
@@ -8098,8 +5969,8 @@ var ts;
     ts.isDeclarationWithTypeParameters = isDeclarationWithTypeParameters;
     function isAnyImportSyntax(node) {
         switch (node.kind) {
-            case 244 /* ImportDeclaration */:
-            case 243 /* ImportEqualsDeclaration */:
+            case 244:
+            case 243:
                 return true;
             default:
                 return false;
@@ -8108,15 +5979,15 @@ var ts;
     ts.isAnyImportSyntax = isAnyImportSyntax;
     function isLateVisibilityPaintedStatement(node) {
         switch (node.kind) {
-            case 244 /* ImportDeclaration */:
-            case 243 /* ImportEqualsDeclaration */:
-            case 214 /* VariableStatement */:
-            case 235 /* ClassDeclaration */:
-            case 234 /* FunctionDeclaration */:
-            case 239 /* ModuleDeclaration */:
-            case 237 /* TypeAliasDeclaration */:
-            case 236 /* InterfaceDeclaration */:
-            case 238 /* EnumDeclaration */:
+            case 244:
+            case 243:
+            case 214:
+            case 235:
+            case 234:
+            case 239:
+            case 237:
+            case 236:
+            case 238:
                 return true;
             default:
                 return false;
@@ -8127,15 +5998,10 @@ var ts;
         return isAnyImportSyntax(node) || ts.isExportDeclaration(node);
     }
     ts.isAnyImportOrReExport = isAnyImportOrReExport;
-    // Gets the nearest enclosing block scope container that has the provided node
-    // as a descendant, that is not the provided node.
     function getEnclosingBlockScopeContainer(node) {
         return findAncestor(node.parent, function (current) { return isBlockScope(current, current.parent); });
     }
     ts.getEnclosingBlockScopeContainer = getEnclosingBlockScopeContainer;
-    // Return display name of an identifier
-    // Computed property names will just be emitted as "[<expr>]", where <expr> is the source
-    // text of the expression in the computed property.
     function declarationNameToString(name) {
         return getFullWidth(name) === 0 ? "(Missing)" : getTextOfNode(name);
     }
@@ -8146,13 +6012,13 @@ var ts;
     ts.getNameFromIndexInfo = getNameFromIndexInfo;
     function getTextOfPropertyName(name) {
         switch (name.kind) {
-            case 71 /* Identifier */:
+            case 71:
                 return name.escapedText;
-            case 9 /* StringLiteral */:
-            case 8 /* NumericLiteral */:
+            case 9:
+            case 8:
                 return escapeLeadingUnderscores(name.text);
-            case 147 /* ComputedPropertyName */:
-                return isStringOrNumericLiteral(name.expression) ? escapeLeadingUnderscores(name.expression.text) : undefined; // TODO: GH#18217 Almost all uses of this assume the result to be defined!
+            case 147:
+                return isStringOrNumericLiteral(name.expression) ? escapeLeadingUnderscores(name.expression.text) : undefined;
             default:
                 ts.Debug.assertNever(name);
         }
@@ -8160,11 +6026,11 @@ var ts;
     ts.getTextOfPropertyName = getTextOfPropertyName;
     function entityNameToString(name) {
         switch (name.kind) {
-            case 71 /* Identifier */:
+            case 71:
                 return getFullWidth(name) === 0 ? ts.idText(name) : getTextOfNode(name);
-            case 146 /* QualifiedName */:
+            case 146:
                 return entityNameToString(name.left) + "." + entityNameToString(name.right);
-            case 185 /* PropertyAccessExpression */:
+            case 185:
                 return entityNameToString(name.expression) + "." + entityNameToString(name.name);
             default:
                 throw ts.Debug.assertNever(name);
@@ -8200,7 +6066,7 @@ var ts;
     }
     ts.createDiagnosticForNodeFromMessageChain = createDiagnosticForNodeFromMessageChain;
     function getSpanOfTokenAtPosition(sourceFile, pos) {
-        var scanner = ts.createScanner(sourceFile.languageVersion, /*skipTrivia*/ true, sourceFile.languageVariant, sourceFile.text, /*onError:*/ undefined, pos);
+        var scanner = ts.createScanner(sourceFile.languageVersion, true, sourceFile.languageVariant, sourceFile.text, undefined, pos);
         scanner.scan();
         var start = scanner.getTokenPos();
         return ts.createTextSpanFromBounds(start, scanner.getTextPos());
@@ -8208,12 +6074,10 @@ var ts;
     ts.getSpanOfTokenAtPosition = getSpanOfTokenAtPosition;
     function getErrorSpanForArrowFunction(sourceFile, node) {
         var pos = ts.skipTrivia(sourceFile.text, node.pos);
-        if (node.body && node.body.kind === 213 /* Block */) {
+        if (node.body && node.body.kind === 213) {
             var startLine = ts.getLineAndCharacterOfPosition(sourceFile, node.body.pos).line;
             var endLine = ts.getLineAndCharacterOfPosition(sourceFile, node.body.end).line;
             if (startLine < endLine) {
-                // The arrow function spans multiple lines,
-                // make the error span be the first line, inclusive.
                 return ts.createTextSpan(pos, getEndLinePosition(startLine, sourceFile) - pos + 1);
             }
         }
@@ -8222,46 +6086,40 @@ var ts;
     function getErrorSpanForNode(sourceFile, node) {
         var errorNode = node;
         switch (node.kind) {
-            case 274 /* SourceFile */:
-                var pos_1 = ts.skipTrivia(sourceFile.text, 0, /*stopAfterLineBreak*/ false);
+            case 274:
+                var pos_1 = ts.skipTrivia(sourceFile.text, 0, false);
                 if (pos_1 === sourceFile.text.length) {
-                    // file is empty - return span for the beginning of the file
                     return ts.createTextSpan(0, 0);
                 }
                 return getSpanOfTokenAtPosition(sourceFile, pos_1);
-            // This list is a work in progress. Add missing node kinds to improve their error
-            // spans.
-            case 232 /* VariableDeclaration */:
-            case 182 /* BindingElement */:
-            case 235 /* ClassDeclaration */:
-            case 205 /* ClassExpression */:
-            case 236 /* InterfaceDeclaration */:
-            case 239 /* ModuleDeclaration */:
-            case 238 /* EnumDeclaration */:
-            case 273 /* EnumMember */:
-            case 234 /* FunctionDeclaration */:
-            case 192 /* FunctionExpression */:
-            case 154 /* MethodDeclaration */:
-            case 156 /* GetAccessor */:
-            case 157 /* SetAccessor */:
-            case 237 /* TypeAliasDeclaration */:
-            case 152 /* PropertyDeclaration */:
-            case 151 /* PropertySignature */:
+            case 232:
+            case 182:
+            case 235:
+            case 205:
+            case 236:
+            case 239:
+            case 238:
+            case 273:
+            case 234:
+            case 192:
+            case 154:
+            case 156:
+            case 157:
+            case 237:
+            case 152:
+            case 151:
                 errorNode = node.name;
                 break;
-            case 193 /* ArrowFunction */:
+            case 193:
                 return getErrorSpanForArrowFunction(sourceFile, node);
         }
         if (errorNode === undefined) {
-            // If we don't have a better node, then just set the error on the first token of
-            // construct.
             return getSpanOfTokenAtPosition(sourceFile, node.pos);
         }
         var isMissing = nodeIsMissing(errorNode);
         var pos = isMissing
             ? errorNode.pos
             : ts.skipTrivia(sourceFile.text, errorNode.pos);
-        // These asserts should all be satisfied for a properly constructed `errorNode`.
         if (isMissing) {
             ts.Debug.assert(pos === errorNode.pos, "This failure could trigger https://github.com/Microsoft/TypeScript/issues/20809");
             ts.Debug.assert(pos === errorNode.end, "This failure could trigger https://github.com/Microsoft/TypeScript/issues/20809");
@@ -8278,58 +6136,57 @@ var ts;
     }
     ts.isExternalOrCommonJsModule = isExternalOrCommonJsModule;
     function isJsonSourceFile(file) {
-        return file.scriptKind === 6 /* JSON */;
+        return file.scriptKind === 6;
     }
     ts.isJsonSourceFile = isJsonSourceFile;
     function isConstEnumDeclaration(node) {
-        return node.kind === 238 /* EnumDeclaration */ && isConst(node);
+        return node.kind === 238 && isConst(node);
     }
     ts.isConstEnumDeclaration = isConstEnumDeclaration;
     function isConst(node) {
-        return !!(ts.getCombinedNodeFlags(node) & 2 /* Const */)
-            || !!(ts.getCombinedModifierFlags(node) & 2048 /* Const */);
+        return !!(ts.getCombinedNodeFlags(node) & 2)
+            || !!(ts.getCombinedModifierFlags(node) & 2048);
     }
     ts.isConst = isConst;
     function isLet(node) {
-        return !!(ts.getCombinedNodeFlags(node) & 1 /* Let */);
+        return !!(ts.getCombinedNodeFlags(node) & 1);
     }
     ts.isLet = isLet;
     function isSuperCall(n) {
-        return n.kind === 187 /* CallExpression */ && n.expression.kind === 97 /* SuperKeyword */;
+        return n.kind === 187 && n.expression.kind === 97;
     }
     ts.isSuperCall = isSuperCall;
     function isImportCall(n) {
-        return n.kind === 187 /* CallExpression */ && n.expression.kind === 91 /* ImportKeyword */;
+        return n.kind === 187 && n.expression.kind === 91;
     }
     ts.isImportCall = isImportCall;
     function isLiteralImportTypeNode(n) {
-        return n.kind === 179 /* ImportType */ &&
-            n.argument.kind === 178 /* LiteralType */ &&
+        return n.kind === 179 &&
+            n.argument.kind === 178 &&
             ts.isStringLiteral(n.argument.literal);
     }
     ts.isLiteralImportTypeNode = isLiteralImportTypeNode;
     function isPrologueDirective(node) {
-        return node.kind === 216 /* ExpressionStatement */
-            && node.expression.kind === 9 /* StringLiteral */;
+        return node.kind === 216
+            && node.expression.kind === 9;
     }
     ts.isPrologueDirective = isPrologueDirective;
     function getLeadingCommentRangesOfNode(node, sourceFileOfNode) {
-        return node.kind !== 10 /* JsxText */ ? ts.getLeadingCommentRanges(sourceFileOfNode.text, node.pos) : undefined;
+        return node.kind !== 10 ? ts.getLeadingCommentRanges(sourceFileOfNode.text, node.pos) : undefined;
     }
     ts.getLeadingCommentRangesOfNode = getLeadingCommentRangesOfNode;
     function getJSDocCommentRanges(node, text) {
-        var commentRanges = (node.kind === 149 /* Parameter */ ||
-            node.kind === 148 /* TypeParameter */ ||
-            node.kind === 192 /* FunctionExpression */ ||
-            node.kind === 193 /* ArrowFunction */ ||
-            node.kind === 191 /* ParenthesizedExpression */) ?
+        var commentRanges = (node.kind === 149 ||
+            node.kind === 148 ||
+            node.kind === 192 ||
+            node.kind === 193 ||
+            node.kind === 191) ?
             ts.concatenate(ts.getTrailingCommentRanges(text, node.pos), ts.getLeadingCommentRanges(text, node.pos)) :
             ts.getLeadingCommentRanges(text, node.pos);
-        // True if the comment starts with '/**' but not if it is '/**/'
         return ts.filter(commentRanges, function (comment) {
-            return text.charCodeAt(comment.pos + 1) === 42 /* asterisk */ &&
-                text.charCodeAt(comment.pos + 2) === 42 /* asterisk */ &&
-                text.charCodeAt(comment.pos + 3) !== 47 /* slash */;
+            return text.charCodeAt(comment.pos + 1) === 42 &&
+                text.charCodeAt(comment.pos + 2) === 42 &&
+                text.charCodeAt(comment.pos + 3) !== 47;
         });
     }
     ts.getJSDocCommentRanges = getJSDocCommentRanges;
@@ -8338,87 +6195,75 @@ var ts;
     ts.fullTripleSlashAMDReferencePathRegEx = /^(\/\/\/\s*<amd-dependency\s+path\s*=\s*)('|")(.+?)\2.*?\/>/;
     var defaultLibReferenceRegEx = /^(\/\/\/\s*<reference\s+no-default-lib\s*=\s*)('|")(.+?)\2\s*\/>/;
     function isPartOfTypeNode(node) {
-        if (161 /* FirstTypeNode */ <= node.kind && node.kind <= 179 /* LastTypeNode */) {
+        if (161 <= node.kind && node.kind <= 179) {
             return true;
         }
         switch (node.kind) {
-            case 119 /* AnyKeyword */:
-            case 142 /* UnknownKeyword */:
-            case 134 /* NumberKeyword */:
-            case 137 /* StringKeyword */:
-            case 122 /* BooleanKeyword */:
-            case 138 /* SymbolKeyword */:
-            case 140 /* UndefinedKeyword */:
-            case 131 /* NeverKeyword */:
+            case 119:
+            case 142:
+            case 134:
+            case 137:
+            case 122:
+            case 138:
+            case 140:
+            case 131:
                 return true;
-            case 105 /* VoidKeyword */:
-                return node.parent.kind !== 196 /* VoidExpression */;
-            case 207 /* ExpressionWithTypeArguments */:
+            case 105:
+                return node.parent.kind !== 196;
+            case 207:
                 return !isExpressionWithTypeArgumentsInClassExtendsClause(node);
-            case 148 /* TypeParameter */:
-                return node.parent.kind === 177 /* MappedType */ || node.parent.kind === 172 /* InferType */;
-            // Identifiers and qualified names may be type nodes, depending on their context. Climb
-            // above them to find the lowest container
-            case 71 /* Identifier */:
-                // If the identifier is the RHS of a qualified name, then it's a type iff its parent is.
-                if (node.parent.kind === 146 /* QualifiedName */ && node.parent.right === node) {
+            case 148:
+                return node.parent.kind === 177 || node.parent.kind === 172;
+            case 71:
+                if (node.parent.kind === 146 && node.parent.right === node) {
                     node = node.parent;
                 }
-                else if (node.parent.kind === 185 /* PropertyAccessExpression */ && node.parent.name === node) {
+                else if (node.parent.kind === 185 && node.parent.name === node) {
                     node = node.parent;
                 }
-                // At this point, node is either a qualified name or an identifier
-                ts.Debug.assert(node.kind === 71 /* Identifier */ || node.kind === 146 /* QualifiedName */ || node.kind === 185 /* PropertyAccessExpression */, "'node' was expected to be a qualified name, identifier or property access in 'isPartOfTypeNode'.");
-            // falls through
-            case 146 /* QualifiedName */:
-            case 185 /* PropertyAccessExpression */:
-            case 99 /* ThisKeyword */: {
+                ts.Debug.assert(node.kind === 71 || node.kind === 146 || node.kind === 185, "'node' was expected to be a qualified name, identifier or property access in 'isPartOfTypeNode'.");
+            case 146:
+            case 185:
+            case 99: {
                 var parent = node.parent;
-                if (parent.kind === 165 /* TypeQuery */) {
+                if (parent.kind === 165) {
                     return false;
                 }
-                if (parent.kind === 179 /* ImportType */) {
+                if (parent.kind === 179) {
                     return !parent.isTypeOf;
                 }
-                // Do not recursively call isPartOfTypeNode on the parent. In the example:
-                //
-                //     let a: A.B.C;
-                //
-                // Calling isPartOfTypeNode would consider the qualified name A.B a type node.
-                // Only C and A.B.C are type nodes.
-                if (161 /* FirstTypeNode */ <= parent.kind && parent.kind <= 179 /* LastTypeNode */) {
+                if (161 <= parent.kind && parent.kind <= 179) {
                     return true;
                 }
                 switch (parent.kind) {
-                    case 207 /* ExpressionWithTypeArguments */:
+                    case 207:
                         return !isExpressionWithTypeArgumentsInClassExtendsClause(parent);
-                    case 148 /* TypeParameter */:
+                    case 148:
                         return node === parent.constraint;
-                    case 152 /* PropertyDeclaration */:
-                    case 151 /* PropertySignature */:
-                    case 149 /* Parameter */:
-                    case 232 /* VariableDeclaration */:
+                    case 152:
+                    case 151:
+                    case 149:
+                    case 232:
                         return node === parent.type;
-                    case 234 /* FunctionDeclaration */:
-                    case 192 /* FunctionExpression */:
-                    case 193 /* ArrowFunction */:
-                    case 155 /* Constructor */:
-                    case 154 /* MethodDeclaration */:
-                    case 153 /* MethodSignature */:
-                    case 156 /* GetAccessor */:
-                    case 157 /* SetAccessor */:
+                    case 234:
+                    case 192:
+                    case 193:
+                    case 155:
+                    case 154:
+                    case 153:
+                    case 156:
+                    case 157:
                         return node === parent.type;
-                    case 158 /* CallSignature */:
-                    case 159 /* ConstructSignature */:
-                    case 160 /* IndexSignature */:
+                    case 158:
+                    case 159:
+                    case 160:
                         return node === parent.type;
-                    case 190 /* TypeAssertionExpression */:
+                    case 190:
                         return node === parent.type;
-                    case 187 /* CallExpression */:
-                    case 188 /* NewExpression */:
+                    case 187:
+                    case 188:
                         return ts.contains(parent.typeArguments, node);
-                    case 189 /* TaggedTemplateExpression */:
-                        // TODO (drosen): TaggedTemplateExpressions may eventually support type arguments.
+                    case 189:
                         return false;
                 }
             }
@@ -8436,29 +6281,27 @@ var ts;
         return false;
     }
     ts.isChildOfNodeWithKind = isChildOfNodeWithKind;
-    // Warning: This has the same semantics as the forEach family of functions,
-    //          in that traversal terminates in the event that 'visitor' supplies a truthy value.
     function forEachReturnStatement(body, visitor) {
         return traverse(body);
         function traverse(node) {
             switch (node.kind) {
-                case 225 /* ReturnStatement */:
+                case 225:
                     return visitor(node);
-                case 241 /* CaseBlock */:
-                case 213 /* Block */:
-                case 217 /* IfStatement */:
-                case 218 /* DoStatement */:
-                case 219 /* WhileStatement */:
-                case 220 /* ForStatement */:
-                case 221 /* ForInStatement */:
-                case 222 /* ForOfStatement */:
-                case 226 /* WithStatement */:
-                case 227 /* SwitchStatement */:
-                case 266 /* CaseClause */:
-                case 267 /* DefaultClause */:
-                case 228 /* LabeledStatement */:
-                case 230 /* TryStatement */:
-                case 269 /* CatchClause */:
+                case 241:
+                case 213:
+                case 217:
+                case 218:
+                case 219:
+                case 220:
+                case 221:
+                case 222:
+                case 226:
+                case 227:
+                case 266:
+                case 267:
+                case 228:
+                case 230:
+                case 269:
                     return ts.forEachChild(node, traverse);
             }
         }
@@ -8468,52 +6311,39 @@ var ts;
         return traverse(body);
         function traverse(node) {
             switch (node.kind) {
-                case 203 /* YieldExpression */:
+                case 203:
                     visitor(node);
                     var operand = node.expression;
                     if (operand) {
                         traverse(operand);
                     }
                     return;
-                case 238 /* EnumDeclaration */:
-                case 236 /* InterfaceDeclaration */:
-                case 239 /* ModuleDeclaration */:
-                case 237 /* TypeAliasDeclaration */:
-                case 235 /* ClassDeclaration */:
-                case 205 /* ClassExpression */:
-                    // These are not allowed inside a generator now, but eventually they may be allowed
-                    // as local types. Regardless, any yield statements contained within them should be
-                    // skipped in this traversal.
+                case 238:
+                case 236:
+                case 239:
+                case 237:
+                case 235:
+                case 205:
                     return;
                 default:
                     if (ts.isFunctionLike(node)) {
-                        if (node.name && node.name.kind === 147 /* ComputedPropertyName */) {
-                            // Note that we will not include methods/accessors of a class because they would require
-                            // first descending into the class. This is by design.
+                        if (node.name && node.name.kind === 147) {
                             traverse(node.name.expression);
                             return;
                         }
                     }
                     else if (!isPartOfTypeNode(node)) {
-                        // This is the general case, which should include mostly expressions and statements.
-                        // Also includes NodeArrays.
                         ts.forEachChild(node, traverse);
                     }
             }
         }
     }
     ts.forEachYieldExpression = forEachYieldExpression;
-    /**
-     * Gets the most likely element type for a TypeNode. This is not an exhaustive test
-     * as it assumes a rest argument can only be an array type (either T[], or Array<T>).
-     *
-     * @param node The type node.
-     */
     function getRestParameterElementType(node) {
-        if (node && node.kind === 167 /* ArrayType */) {
+        if (node && node.kind === 167) {
             return node.elementType;
         }
-        else if (node && node.kind === 162 /* TypeReference */) {
+        else if (node && node.kind === 162) {
             return ts.singleOrUndefined(node.typeArguments);
         }
         else {
@@ -8523,12 +6353,12 @@ var ts;
     ts.getRestParameterElementType = getRestParameterElementType;
     function getMembersOfDeclaration(node) {
         switch (node.kind) {
-            case 236 /* InterfaceDeclaration */:
-            case 235 /* ClassDeclaration */:
-            case 205 /* ClassExpression */:
-            case 166 /* TypeLiteral */:
+            case 236:
+            case 235:
+            case 205:
+            case 166:
                 return node.members;
-            case 184 /* ObjectLiteralExpression */:
+            case 184:
                 return node.properties;
         }
     }
@@ -8536,14 +6366,14 @@ var ts;
     function isVariableLike(node) {
         if (node) {
             switch (node.kind) {
-                case 182 /* BindingElement */:
-                case 273 /* EnumMember */:
-                case 149 /* Parameter */:
-                case 270 /* PropertyAssignment */:
-                case 152 /* PropertyDeclaration */:
-                case 151 /* PropertySignature */:
-                case 271 /* ShorthandPropertyAssignment */:
-                case 232 /* VariableDeclaration */:
+                case 182:
+                case 273:
+                case 149:
+                case 270:
+                case 152:
+                case 151:
+                case 271:
+                case 232:
                     return true;
             }
         }
@@ -8555,8 +6385,8 @@ var ts;
     }
     ts.isVariableLikeOrAccessor = isVariableLikeOrAccessor;
     function isVariableDeclarationInVariableStatement(node) {
-        return node.parent.kind === 233 /* VariableDeclarationList */
-            && node.parent.parent.kind === 214 /* VariableStatement */;
+        return node.parent.kind === 233
+            && node.parent.parent.kind === 214;
     }
     ts.isVariableDeclarationInVariableStatement = isVariableDeclarationInVariableStatement;
     function isValidESSymbolDeclaration(node) {
@@ -8567,13 +6397,13 @@ var ts;
     ts.isValidESSymbolDeclaration = isValidESSymbolDeclaration;
     function introducesArgumentsExoticObject(node) {
         switch (node.kind) {
-            case 154 /* MethodDeclaration */:
-            case 153 /* MethodSignature */:
-            case 155 /* Constructor */:
-            case 156 /* GetAccessor */:
-            case 157 /* SetAccessor */:
-            case 234 /* FunctionDeclaration */:
-            case 192 /* FunctionExpression */:
+            case 154:
+            case 153:
+            case 155:
+            case 156:
+            case 157:
+            case 234:
+            case 192:
                 return true;
         }
         return false;
@@ -8584,7 +6414,7 @@ var ts;
             if (beforeUnwrapLabelCallback) {
                 beforeUnwrapLabelCallback(node);
             }
-            if (node.statement.kind !== 228 /* LabeledStatement */) {
+            if (node.statement.kind !== 228) {
                 return node.statement;
             }
             node = node.statement;
@@ -8592,30 +6422,30 @@ var ts;
     }
     ts.unwrapInnermostStatementOfLabel = unwrapInnermostStatementOfLabel;
     function isFunctionBlock(node) {
-        return node && node.kind === 213 /* Block */ && ts.isFunctionLike(node.parent);
+        return node && node.kind === 213 && ts.isFunctionLike(node.parent);
     }
     ts.isFunctionBlock = isFunctionBlock;
     function isObjectLiteralMethod(node) {
-        return node && node.kind === 154 /* MethodDeclaration */ && node.parent.kind === 184 /* ObjectLiteralExpression */;
+        return node && node.kind === 154 && node.parent.kind === 184;
     }
     ts.isObjectLiteralMethod = isObjectLiteralMethod;
     function isObjectLiteralOrClassExpressionMethod(node) {
-        return node.kind === 154 /* MethodDeclaration */ &&
-            (node.parent.kind === 184 /* ObjectLiteralExpression */ ||
-                node.parent.kind === 205 /* ClassExpression */);
+        return node.kind === 154 &&
+            (node.parent.kind === 184 ||
+                node.parent.kind === 205);
     }
     ts.isObjectLiteralOrClassExpressionMethod = isObjectLiteralOrClassExpressionMethod;
     function isIdentifierTypePredicate(predicate) {
-        return predicate && predicate.kind === 1 /* Identifier */;
+        return predicate && predicate.kind === 1;
     }
     ts.isIdentifierTypePredicate = isIdentifierTypePredicate;
     function isThisTypePredicate(predicate) {
-        return predicate && predicate.kind === 0 /* This */;
+        return predicate && predicate.kind === 0;
     }
     ts.isThisTypePredicate = isThisTypePredicate;
     function getPropertyAssignment(objectLiteral, key, key2) {
         return objectLiteral.properties.filter(function (property) {
-            if (property.kind === 270 /* PropertyAssignment */) {
+            if (property.kind === 270) {
                 var propName = getTextOfPropertyName(property.name);
                 return key === propName || (!!key2 && key2 === propName);
             }
@@ -8652,87 +6482,64 @@ var ts;
     }
     ts.getContainingClass = getContainingClass;
     function getThisContainer(node, includeArrowFunctions) {
-        ts.Debug.assert(node.kind !== 274 /* SourceFile */);
+        ts.Debug.assert(node.kind !== 274);
         while (true) {
             node = node.parent;
             if (!node) {
-                return ts.Debug.fail(); // If we never pass in a SourceFile, this should be unreachable, since we'll stop when we reach that.
+                return ts.Debug.fail();
             }
             switch (node.kind) {
-                case 147 /* ComputedPropertyName */:
-                    // If the grandparent node is an object literal (as opposed to a class),
-                    // then the computed property is not a 'this' container.
-                    // A computed property name in a class needs to be a this container
-                    // so that we can error on it.
+                case 147:
                     if (ts.isClassLike(node.parent.parent)) {
                         return node;
                     }
-                    // If this is a computed property, then the parent should not
-                    // make it a this container. The parent might be a property
-                    // in an object literal, like a method or accessor. But in order for
-                    // such a parent to be a this container, the reference must be in
-                    // the *body* of the container.
                     node = node.parent;
                     break;
-                case 150 /* Decorator */:
-                    // Decorators are always applied outside of the body of a class or method.
-                    if (node.parent.kind === 149 /* Parameter */ && ts.isClassElement(node.parent.parent)) {
-                        // If the decorator's parent is a Parameter, we resolve the this container from
-                        // the grandparent class declaration.
+                case 150:
+                    if (node.parent.kind === 149 && ts.isClassElement(node.parent.parent)) {
                         node = node.parent.parent;
                     }
                     else if (ts.isClassElement(node.parent)) {
-                        // If the decorator's parent is a class element, we resolve the 'this' container
-                        // from the parent class declaration.
                         node = node.parent;
                     }
                     break;
-                case 193 /* ArrowFunction */:
+                case 193:
                     if (!includeArrowFunctions) {
                         continue;
                     }
-                // falls through
-                case 234 /* FunctionDeclaration */:
-                case 192 /* FunctionExpression */:
-                case 239 /* ModuleDeclaration */:
-                case 152 /* PropertyDeclaration */:
-                case 151 /* PropertySignature */:
-                case 154 /* MethodDeclaration */:
-                case 153 /* MethodSignature */:
-                case 155 /* Constructor */:
-                case 156 /* GetAccessor */:
-                case 157 /* SetAccessor */:
-                case 158 /* CallSignature */:
-                case 159 /* ConstructSignature */:
-                case 160 /* IndexSignature */:
-                case 238 /* EnumDeclaration */:
-                case 274 /* SourceFile */:
+                case 234:
+                case 192:
+                case 239:
+                case 152:
+                case 151:
+                case 154:
+                case 153:
+                case 155:
+                case 156:
+                case 157:
+                case 158:
+                case 159:
+                case 160:
+                case 238:
+                case 274:
                     return node;
             }
         }
     }
     ts.getThisContainer = getThisContainer;
     function getNewTargetContainer(node) {
-        var container = getThisContainer(node, /*includeArrowFunctions*/ false);
+        var container = getThisContainer(node, false);
         if (container) {
             switch (container.kind) {
-                case 155 /* Constructor */:
-                case 234 /* FunctionDeclaration */:
-                case 192 /* FunctionExpression */:
+                case 155:
+                case 234:
+                case 192:
                     return container;
             }
         }
         return undefined;
     }
     ts.getNewTargetContainer = getNewTargetContainer;
-    /**
-     * Given an super call/property node, returns the closest node where
-     * - a super call/property access is legal in the node and not legal in the parent node the node.
-     *   i.e. super call is legal in constructor but not legal in the class body.
-     * - the container is an arrow function (so caller might need to call getSuperContainer again in case it needs to climb higher)
-     * - a super call/property is definitely illegal in the container (but might be legal in some subnode)
-     *   i.e. super property access is illegal in function declaration but can be legal in the statement list
-     */
     function getSuperContainer(node, stopOnFunctions) {
         while (true) {
             node = node.parent;
@@ -8740,34 +6547,28 @@ var ts;
                 return node;
             }
             switch (node.kind) {
-                case 147 /* ComputedPropertyName */:
+                case 147:
                     node = node.parent;
                     break;
-                case 234 /* FunctionDeclaration */:
-                case 192 /* FunctionExpression */:
-                case 193 /* ArrowFunction */:
+                case 234:
+                case 192:
+                case 193:
                     if (!stopOnFunctions) {
                         continue;
                     }
-                // falls through
-                case 152 /* PropertyDeclaration */:
-                case 151 /* PropertySignature */:
-                case 154 /* MethodDeclaration */:
-                case 153 /* MethodSignature */:
-                case 155 /* Constructor */:
-                case 156 /* GetAccessor */:
-                case 157 /* SetAccessor */:
+                case 152:
+                case 151:
+                case 154:
+                case 153:
+                case 155:
+                case 156:
+                case 157:
                     return node;
-                case 150 /* Decorator */:
-                    // Decorators are always applied outside of the body of a class or method.
-                    if (node.parent.kind === 149 /* Parameter */ && ts.isClassElement(node.parent.parent)) {
-                        // If the decorator's parent is a Parameter, we resolve the this container from
-                        // the grandparent class declaration.
+                case 150:
+                    if (node.parent.kind === 149 && ts.isClassElement(node.parent.parent)) {
                         node = node.parent.parent;
                     }
                     else if (ts.isClassElement(node.parent)) {
-                        // If the decorator's parent is a class element, we resolve the 'this' container
-                        // from the parent class declaration.
                         node = node.parent;
                     }
                     break;
@@ -8776,47 +6577,41 @@ var ts;
     }
     ts.getSuperContainer = getSuperContainer;
     function getImmediatelyInvokedFunctionExpression(func) {
-        if (func.kind === 192 /* FunctionExpression */ || func.kind === 193 /* ArrowFunction */) {
+        if (func.kind === 192 || func.kind === 193) {
             var prev = func;
             var parent = func.parent;
-            while (parent.kind === 191 /* ParenthesizedExpression */) {
+            while (parent.kind === 191) {
                 prev = parent;
                 parent = parent.parent;
             }
-            if (parent.kind === 187 /* CallExpression */ && parent.expression === prev) {
+            if (parent.kind === 187 && parent.expression === prev) {
                 return parent;
             }
         }
     }
     ts.getImmediatelyInvokedFunctionExpression = getImmediatelyInvokedFunctionExpression;
-    /**
-     * Determines whether a node is a property or element access expression for `super`.
-     */
     function isSuperProperty(node) {
         var kind = node.kind;
-        return (kind === 185 /* PropertyAccessExpression */ || kind === 186 /* ElementAccessExpression */)
-            && node.expression.kind === 97 /* SuperKeyword */;
+        return (kind === 185 || kind === 186)
+            && node.expression.kind === 97;
     }
     ts.isSuperProperty = isSuperProperty;
-    /**
-     * Determines whether a node is a property or element access expression for `this`.
-     */
     function isThisProperty(node) {
         var kind = node.kind;
-        return (kind === 185 /* PropertyAccessExpression */ || kind === 186 /* ElementAccessExpression */)
-            && node.expression.kind === 99 /* ThisKeyword */;
+        return (kind === 185 || kind === 186)
+            && node.expression.kind === 99;
     }
     ts.isThisProperty = isThisProperty;
     function getEntityNameFromTypeNode(node) {
         switch (node.kind) {
-            case 162 /* TypeReference */:
+            case 162:
                 return node.typeName;
-            case 207 /* ExpressionWithTypeArguments */:
+            case 207:
                 return isEntityNameExpression(node.expression)
                     ? node.expression
                     : undefined;
-            case 71 /* Identifier */:
-            case 146 /* QualifiedName */:
+            case 71:
+            case 146:
                 return node;
         }
         return undefined;
@@ -8824,10 +6619,10 @@ var ts;
     ts.getEntityNameFromTypeNode = getEntityNameFromTypeNode;
     function getInvokedExpression(node) {
         switch (node.kind) {
-            case 189 /* TaggedTemplateExpression */:
+            case 189:
                 return node.tag;
-            case 257 /* JsxOpeningElement */:
-            case 256 /* JsxSelfClosingElement */:
+            case 257:
+            case 256:
                 return node.tagName;
             default:
                 return node.expression;
@@ -8836,45 +6631,41 @@ var ts;
     ts.getInvokedExpression = getInvokedExpression;
     function nodeCanBeDecorated(node, parent, grandparent) {
         switch (node.kind) {
-            case 235 /* ClassDeclaration */:
-                // classes are valid targets
+            case 235:
                 return true;
-            case 152 /* PropertyDeclaration */:
-                // property declarations are valid if their parent is a class declaration.
-                return parent.kind === 235 /* ClassDeclaration */;
-            case 156 /* GetAccessor */:
-            case 157 /* SetAccessor */:
-            case 154 /* MethodDeclaration */:
-                // if this method has a body and its parent is a class declaration, this is a valid target.
+            case 152:
+                return parent.kind === 235;
+            case 156:
+            case 157:
+            case 154:
                 return node.body !== undefined
-                    && parent.kind === 235 /* ClassDeclaration */;
-            case 149 /* Parameter */:
-                // if the parameter's parent has a body and its grandparent is a class declaration, this is a valid target;
+                    && parent.kind === 235;
+            case 149:
                 return parent.body !== undefined
-                    && (parent.kind === 155 /* Constructor */
-                        || parent.kind === 154 /* MethodDeclaration */
-                        || parent.kind === 157 /* SetAccessor */)
-                    && grandparent.kind === 235 /* ClassDeclaration */;
+                    && (parent.kind === 155
+                        || parent.kind === 154
+                        || parent.kind === 157)
+                    && grandparent.kind === 235;
         }
         return false;
     }
     ts.nodeCanBeDecorated = nodeCanBeDecorated;
     function nodeIsDecorated(node, parent, grandparent) {
         return node.decorators !== undefined
-            && nodeCanBeDecorated(node, parent, grandparent); // TODO: GH#18217
+            && nodeCanBeDecorated(node, parent, grandparent);
     }
     ts.nodeIsDecorated = nodeIsDecorated;
     function nodeOrChildIsDecorated(node, parent, grandparent) {
-        return nodeIsDecorated(node, parent, grandparent) || childIsDecorated(node, parent); // TODO: GH#18217
+        return nodeIsDecorated(node, parent, grandparent) || childIsDecorated(node, parent);
     }
     ts.nodeOrChildIsDecorated = nodeOrChildIsDecorated;
     function childIsDecorated(node, parent) {
         switch (node.kind) {
-            case 235 /* ClassDeclaration */:
-                return ts.some(node.members, function (m) { return nodeOrChildIsDecorated(m, node, parent); }); // TODO: GH#18217
-            case 154 /* MethodDeclaration */:
-            case 157 /* SetAccessor */:
-                return ts.some(node.parameters, function (p) { return nodeIsDecorated(p, node, parent); }); // TODO: GH#18217
+            case 235:
+                return ts.some(node.members, function (m) { return nodeOrChildIsDecorated(m, node, parent); });
+            case 154:
+            case 157:
+                return ts.some(node.parameters, function (p) { return nodeIsDecorated(p, node, parent); });
             default:
                 return false;
         }
@@ -8882,9 +6673,9 @@ var ts;
     ts.childIsDecorated = childIsDecorated;
     function isJSXTagName(node) {
         var parent = node.parent;
-        if (parent.kind === 257 /* JsxOpeningElement */ ||
-            parent.kind === 256 /* JsxSelfClosingElement */ ||
-            parent.kind === 258 /* JsxClosingElement */) {
+        if (parent.kind === 257 ||
+            parent.kind === 256 ||
+            parent.kind === 258) {
             return parent.tagName === node;
         }
         return false;
@@ -8892,56 +6683,55 @@ var ts;
     ts.isJSXTagName = isJSXTagName;
     function isExpressionNode(node) {
         switch (node.kind) {
-            case 97 /* SuperKeyword */:
-            case 95 /* NullKeyword */:
-            case 101 /* TrueKeyword */:
-            case 86 /* FalseKeyword */:
-            case 12 /* RegularExpressionLiteral */:
-            case 183 /* ArrayLiteralExpression */:
-            case 184 /* ObjectLiteralExpression */:
-            case 185 /* PropertyAccessExpression */:
-            case 186 /* ElementAccessExpression */:
-            case 187 /* CallExpression */:
-            case 188 /* NewExpression */:
-            case 189 /* TaggedTemplateExpression */:
-            case 208 /* AsExpression */:
-            case 190 /* TypeAssertionExpression */:
-            case 209 /* NonNullExpression */:
-            case 191 /* ParenthesizedExpression */:
-            case 192 /* FunctionExpression */:
-            case 205 /* ClassExpression */:
-            case 193 /* ArrowFunction */:
-            case 196 /* VoidExpression */:
-            case 194 /* DeleteExpression */:
-            case 195 /* TypeOfExpression */:
-            case 198 /* PrefixUnaryExpression */:
-            case 199 /* PostfixUnaryExpression */:
-            case 200 /* BinaryExpression */:
-            case 201 /* ConditionalExpression */:
-            case 204 /* SpreadElement */:
-            case 202 /* TemplateExpression */:
-            case 13 /* NoSubstitutionTemplateLiteral */:
-            case 206 /* OmittedExpression */:
-            case 255 /* JsxElement */:
-            case 256 /* JsxSelfClosingElement */:
-            case 259 /* JsxFragment */:
-            case 203 /* YieldExpression */:
-            case 197 /* AwaitExpression */:
-            case 210 /* MetaProperty */:
+            case 97:
+            case 95:
+            case 101:
+            case 86:
+            case 12:
+            case 183:
+            case 184:
+            case 185:
+            case 186:
+            case 187:
+            case 188:
+            case 189:
+            case 208:
+            case 190:
+            case 209:
+            case 191:
+            case 192:
+            case 205:
+            case 193:
+            case 196:
+            case 194:
+            case 195:
+            case 198:
+            case 199:
+            case 200:
+            case 201:
+            case 204:
+            case 202:
+            case 13:
+            case 206:
+            case 255:
+            case 256:
+            case 259:
+            case 203:
+            case 197:
+            case 210:
                 return true;
-            case 146 /* QualifiedName */:
-                while (node.parent.kind === 146 /* QualifiedName */) {
+            case 146:
+                while (node.parent.kind === 146) {
                     node = node.parent;
                 }
-                return node.parent.kind === 165 /* TypeQuery */ || isJSXTagName(node);
-            case 71 /* Identifier */:
-                if (node.parent.kind === 165 /* TypeQuery */ || isJSXTagName(node)) {
+                return node.parent.kind === 165 || isJSXTagName(node);
+            case 71:
+                if (node.parent.kind === 165 || isJSXTagName(node)) {
                     return true;
                 }
-            // falls through
-            case 8 /* NumericLiteral */:
-            case 9 /* StringLiteral */:
-            case 99 /* ThisKeyword */:
+            case 8:
+            case 9:
+            case 99:
                 return isInExpressionContext(node);
             default:
                 return false;
@@ -8951,47 +6741,47 @@ var ts;
     function isInExpressionContext(node) {
         var parent = node.parent;
         switch (parent.kind) {
-            case 232 /* VariableDeclaration */:
-            case 149 /* Parameter */:
-            case 152 /* PropertyDeclaration */:
-            case 151 /* PropertySignature */:
-            case 273 /* EnumMember */:
-            case 270 /* PropertyAssignment */:
-            case 182 /* BindingElement */:
+            case 232:
+            case 149:
+            case 152:
+            case 151:
+            case 273:
+            case 270:
+            case 182:
                 return parent.initializer === node;
-            case 216 /* ExpressionStatement */:
-            case 217 /* IfStatement */:
-            case 218 /* DoStatement */:
-            case 219 /* WhileStatement */:
-            case 225 /* ReturnStatement */:
-            case 226 /* WithStatement */:
-            case 227 /* SwitchStatement */:
-            case 266 /* CaseClause */:
-            case 229 /* ThrowStatement */:
+            case 216:
+            case 217:
+            case 218:
+            case 219:
+            case 225:
+            case 226:
+            case 227:
+            case 266:
+            case 229:
                 return parent.expression === node;
-            case 220 /* ForStatement */:
+            case 220:
                 var forStatement = parent;
-                return (forStatement.initializer === node && forStatement.initializer.kind !== 233 /* VariableDeclarationList */) ||
+                return (forStatement.initializer === node && forStatement.initializer.kind !== 233) ||
                     forStatement.condition === node ||
                     forStatement.incrementor === node;
-            case 221 /* ForInStatement */:
-            case 222 /* ForOfStatement */:
+            case 221:
+            case 222:
                 var forInStatement = parent;
-                return (forInStatement.initializer === node && forInStatement.initializer.kind !== 233 /* VariableDeclarationList */) ||
+                return (forInStatement.initializer === node && forInStatement.initializer.kind !== 233) ||
                     forInStatement.expression === node;
-            case 190 /* TypeAssertionExpression */:
-            case 208 /* AsExpression */:
+            case 190:
+            case 208:
                 return node === parent.expression;
-            case 211 /* TemplateSpan */:
+            case 211:
                 return node === parent.expression;
-            case 147 /* ComputedPropertyName */:
+            case 147:
                 return node === parent.expression;
-            case 150 /* Decorator */:
-            case 265 /* JsxExpression */:
-            case 264 /* JsxSpreadAttribute */:
-            case 272 /* SpreadAssignment */:
+            case 150:
+            case 265:
+            case 264:
+            case 272:
                 return true;
-            case 207 /* ExpressionWithTypeArguments */:
+            case 207:
                 return parent.expression === node && isExpressionWithTypeArgumentsInClassExtendsClause(parent);
             default:
                 return isExpressionNode(parent);
@@ -8999,7 +6789,7 @@ var ts;
     }
     ts.isInExpressionContext = isInExpressionContext;
     function isExternalModuleImportEqualsDeclaration(node) {
-        return node.kind === 243 /* ImportEqualsDeclaration */ && node.moduleReference.kind === 254 /* ExternalModuleReference */;
+        return node.kind === 243 && node.moduleReference.kind === 254;
     }
     ts.isExternalModuleImportEqualsDeclaration = isExternalModuleImportEqualsDeclaration;
     function getExternalModuleImportEqualsDeclarationExpression(node) {
@@ -9008,7 +6798,7 @@ var ts;
     }
     ts.getExternalModuleImportEqualsDeclarationExpression = getExternalModuleImportEqualsDeclarationExpression;
     function isInternalModuleImportEqualsDeclaration(node) {
-        return node.kind === 243 /* ImportEqualsDeclaration */ && node.moduleReference.kind !== 254 /* ExternalModuleReference */;
+        return node.kind === 243 && node.moduleReference.kind !== 254;
     }
     ts.isInternalModuleImportEqualsDeclaration = isInternalModuleImportEqualsDeclaration;
     function isSourceFileJavaScript(file) {
@@ -9020,15 +6810,15 @@ var ts;
     }
     ts.isSourceFileNotJavaScript = isSourceFileNotJavaScript;
     function isInJavaScriptFile(node) {
-        return !!node && !!(node.flags & 65536 /* JavaScriptFile */);
+        return !!node && !!(node.flags & 65536);
     }
     ts.isInJavaScriptFile = isInJavaScriptFile;
     function isInJsonFile(node) {
-        return !!node && !!(node.flags & 16777216 /* JsonFile */);
+        return !!node && !!(node.flags & 16777216);
     }
     ts.isInJsonFile = isInJsonFile;
     function isInJSDoc(node) {
-        return !!node && !!(node.flags & 2097152 /* JSDoc */);
+        return !!node && !!(node.flags & 2097152);
     }
     ts.isInJSDoc = isInJSDoc;
     function isJSDocIndexSignature(node) {
@@ -9036,15 +6826,15 @@ var ts;
             ts.isIdentifier(node.typeName) &&
             node.typeName.escapedText === "Object" &&
             node.typeArguments && node.typeArguments.length === 2 &&
-            (node.typeArguments[0].kind === 137 /* StringKeyword */ || node.typeArguments[0].kind === 134 /* NumberKeyword */);
+            (node.typeArguments[0].kind === 137 || node.typeArguments[0].kind === 134);
     }
     ts.isJSDocIndexSignature = isJSDocIndexSignature;
     function isRequireCall(callExpression, checkArgumentIsStringLiteralLike) {
-        if (callExpression.kind !== 187 /* CallExpression */) {
+        if (callExpression.kind !== 187) {
             return false;
         }
         var _a = callExpression, expression = _a.expression, args = _a.arguments;
-        if (expression.kind !== 71 /* Identifier */ || expression.escapedText !== "require") {
+        if (expression.kind !== 71 || expression.escapedText !== "require") {
             return false;
         }
         if (args.length !== 1) {
@@ -9055,11 +6845,11 @@ var ts;
     }
     ts.isRequireCall = isRequireCall;
     function isSingleOrDoubleQuote(charCode) {
-        return charCode === 39 /* singleQuote */ || charCode === 34 /* doubleQuote */;
+        return charCode === 39 || charCode === 34;
     }
     ts.isSingleOrDoubleQuote = isSingleOrDoubleQuote;
     function isStringDoubleQuoted(str, sourceFile) {
-        return getSourceTextOfNodeFromSourceFile(sourceFile, str).charCodeAt(0) === 34 /* doubleQuote */;
+        return getSourceTextOfNodeFromSourceFile(sourceFile, str).charCodeAt(0) === 34;
     }
     ts.isStringDoubleQuoted = isStringDoubleQuoted;
     function getDeclarationOfJSInitializer(node) {
@@ -9072,16 +6862,16 @@ var ts;
             name = node.parent.name;
             decl = node.parent;
         }
-        else if (ts.isBinaryExpression(node.parent) && node.parent.operatorToken.kind === 58 /* EqualsToken */ && node.parent.right === node) {
+        else if (ts.isBinaryExpression(node.parent) && node.parent.operatorToken.kind === 58 && node.parent.right === node) {
             name = node.parent.left;
             decl = name;
         }
-        else if (ts.isBinaryExpression(node.parent) && node.parent.operatorToken.kind === 54 /* BarBarToken */) {
+        else if (ts.isBinaryExpression(node.parent) && node.parent.operatorToken.kind === 54) {
             if (ts.isVariableDeclaration(node.parent.parent) && node.parent.parent.initializer === node.parent) {
                 name = node.parent.parent.name;
                 decl = node.parent.parent;
             }
-            else if (ts.isBinaryExpression(node.parent.parent) && node.parent.parent.operatorToken.kind === 58 /* EqualsToken */ && node.parent.parent.right === node.parent) {
+            else if (ts.isBinaryExpression(node.parent.parent) && node.parent.parent.operatorToken.kind === 58 && node.parent.parent.right === node.parent) {
                 name = node.parent.parent.left;
                 decl = name;
             }
@@ -9095,46 +6885,31 @@ var ts;
         return decl;
     }
     ts.getDeclarationOfJSInitializer = getDeclarationOfJSInitializer;
-    /** Get the initializer, taking into account defaulted Javascript initializers */
     function getEffectiveInitializer(node) {
         if (isInJavaScriptFile(node) && node.initializer &&
-            ts.isBinaryExpression(node.initializer) && node.initializer.operatorToken.kind === 54 /* BarBarToken */ &&
+            ts.isBinaryExpression(node.initializer) && node.initializer.operatorToken.kind === 54 &&
             node.name && isEntityNameExpression(node.name) && isSameEntityName(node.name, node.initializer.left)) {
             return node.initializer.right;
         }
         return node.initializer;
     }
     ts.getEffectiveInitializer = getEffectiveInitializer;
-    /**
-     * Get the assignment 'initializer' -- the righthand side-- when the initializer is container-like (See getJavascriptInitializer).
-     * We treat the right hand side of assignments with container-like initalizers as declarations.
-     */
     function getAssignedJavascriptInitializer(node) {
-        if (node && node.parent && ts.isBinaryExpression(node.parent) && node.parent.operatorToken.kind === 58 /* EqualsToken */) {
+        if (node && node.parent && ts.isBinaryExpression(node.parent) && node.parent.operatorToken.kind === 58) {
             var isPrototypeAssignment = isPrototypeAccess(node.parent.left);
             return getJavascriptInitializer(node.parent.right, isPrototypeAssignment) ||
                 getDefaultedJavascriptInitializer(node.parent.left, node.parent.right, isPrototypeAssignment);
         }
     }
     ts.getAssignedJavascriptInitializer = getAssignedJavascriptInitializer;
-    /**
-     * Recognized Javascript container-like initializers are:
-     * 1. (function() {})() -- IIFEs
-     * 2. function() { } -- Function expressions
-     * 3. class { } -- Class expressions
-     * 4. {} -- Empty object literals
-     * 5. { ... } -- Non-empty object literals, when used to initialize a prototype, like `C.prototype = { m() { } }`
-     *
-     * This function returns the provided initializer, or undefined if it is not valid.
-     */
     function getJavascriptInitializer(initializer, isPrototypeAssignment) {
         if (ts.isCallExpression(initializer)) {
             var e = skipParentheses(initializer.expression);
-            return e.kind === 192 /* FunctionExpression */ || e.kind === 193 /* ArrowFunction */ ? initializer : undefined;
+            return e.kind === 192 || e.kind === 193 ? initializer : undefined;
         }
-        if (initializer.kind === 192 /* FunctionExpression */ ||
-            initializer.kind === 205 /* ClassExpression */ ||
-            initializer.kind === 193 /* ArrowFunction */) {
+        if (initializer.kind === 192 ||
+            initializer.kind === 205 ||
+            initializer.kind === 193) {
             return initializer;
         }
         if (ts.isObjectLiteralExpression(initializer) && (initializer.properties.length === 0 || isPrototypeAssignment)) {
@@ -9142,32 +6917,23 @@ var ts;
         }
     }
     ts.getJavascriptInitializer = getJavascriptInitializer;
-    /**
-     * A defaulted Javascript initializer matches the pattern
-     * `Lhs = Lhs || JavascriptInitializer`
-     * or `var Lhs = Lhs || JavascriptInitializer`
-     *
-     * The second Lhs is required to be the same as the first except that it may be prefixed with
-     * 'window.', 'global.' or 'self.' The second Lhs is otherwise ignored by the binder and checker.
-     */
     function getDefaultedJavascriptInitializer(name, initializer, isPrototypeAssignment) {
-        var e = ts.isBinaryExpression(initializer) && initializer.operatorToken.kind === 54 /* BarBarToken */ && getJavascriptInitializer(initializer.right, isPrototypeAssignment);
+        var e = ts.isBinaryExpression(initializer) && initializer.operatorToken.kind === 54 && getJavascriptInitializer(initializer.right, isPrototypeAssignment);
         if (e && isSameEntityName(name, initializer.left)) {
             return e;
         }
     }
     function isDefaultedJavascriptInitializer(node) {
         var name = ts.isVariableDeclaration(node.parent) ? node.parent.name :
-            ts.isBinaryExpression(node.parent) && node.parent.operatorToken.kind === 58 /* EqualsToken */ ? node.parent.left :
+            ts.isBinaryExpression(node.parent) && node.parent.operatorToken.kind === 58 ? node.parent.left :
                 undefined;
         return name && getJavascriptInitializer(node.right, isPrototypeAccess(name)) && isEntityNameExpression(name) && isSameEntityName(name, node.left);
     }
     ts.isDefaultedJavascriptInitializer = isDefaultedJavascriptInitializer;
-    /** Given a Javascript initializer, return the outer name. That is, the lhs of the assignment or the declaration name. */
     function getOuterNameOfJsInitializer(node) {
         if (ts.isBinaryExpression(node.parent)) {
-            var parent = (node.parent.operatorToken.kind === 54 /* BarBarToken */ && ts.isBinaryExpression(node.parent.parent)) ? node.parent.parent : node.parent;
-            if (parent.operatorToken.kind === 58 /* EqualsToken */ && ts.isIdentifier(parent.left)) {
+            var parent = (node.parent.operatorToken.kind === 54 && ts.isBinaryExpression(node.parent.parent)) ? node.parent.parent : node.parent;
+            if (parent.operatorToken.kind === 58 && ts.isIdentifier(parent.left)) {
                 return parent.left;
             }
         }
@@ -9176,21 +6942,12 @@ var ts;
         }
     }
     ts.getOuterNameOfJsInitializer = getOuterNameOfJsInitializer;
-    /**
-     * Is the 'declared' name the same as the one in the initializer?
-     * @return true for identical entity names, as well as ones where the initializer is prefixed with
-     * 'window', 'self' or 'global'. For example:
-     *
-     * var my = my || {}
-     * var min = window.min || {}
-     * my.app = self.my.app || class { }
-     */
     function isSameEntityName(name, initializer) {
         if (ts.isIdentifier(name) && ts.isIdentifier(initializer)) {
             return name.escapedText === initializer.escapedText;
         }
         if (ts.isIdentifier(name) && ts.isPropertyAccessExpression(initializer)) {
-            return (initializer.expression.kind === 99 /* ThisKeyword */ ||
+            return (initializer.expression.kind === 99 ||
                 ts.isIdentifier(initializer.expression) &&
                     (initializer.expression.escapedText === "window" ||
                         initializer.expression.escapedText === "self" ||
@@ -9203,7 +6960,7 @@ var ts;
         return false;
     }
     function getRightMostAssignedExpression(node) {
-        while (isAssignmentExpression(node, /*excludeCompoundAssignements*/ true)) {
+        while (isAssignmentExpression(node, true)) {
             node = node.right;
         }
         return node;
@@ -9217,30 +6974,25 @@ var ts;
         return ts.isPropertyAccessExpression(node) && ts.isIdentifier(node.expression) && node.expression.escapedText === "module" && node.name.escapedText === "exports";
     }
     ts.isModuleExportsPropertyAccessExpression = isModuleExportsPropertyAccessExpression;
-    /// Given a BinaryExpression, returns SpecialPropertyAssignmentKind for the various kinds of property
-    /// assignments we treat as special in the binder
     function getSpecialPropertyAssignmentKind(expr) {
         if (!isInJavaScriptFile(expr) ||
-            expr.operatorToken.kind !== 58 /* EqualsToken */ ||
+            expr.operatorToken.kind !== 58 ||
             !ts.isPropertyAccessExpression(expr.left)) {
-            return 0 /* None */;
+            return 0;
         }
         var lhs = expr.left;
-        if (lhs.expression.kind === 99 /* ThisKeyword */) {
-            return 4 /* ThisProperty */;
+        if (lhs.expression.kind === 99) {
+            return 4;
         }
         else if (ts.isIdentifier(lhs.expression) && lhs.expression.escapedText === "module" && lhs.name.escapedText === "exports") {
-            // module.exports = expr
-            return 2 /* ModuleExports */;
+            return 2;
         }
         else if (isEntityNameExpression(lhs.expression)) {
             if (lhs.name.escapedText === "prototype" && ts.isObjectLiteralExpression(getInitializerOfBinaryExpression(expr))) {
-                // F.prototype = { ... }
-                return 6 /* Prototype */;
+                return 6;
             }
             else if (isPrototypeAccess(lhs.expression)) {
-                // F.G....prototype.x = expr
-                return 3 /* PrototypeProperty */;
+                return 3;
             }
             var nextToLast = lhs;
             while (ts.isPropertyAccessExpression(nextToLast.expression)) {
@@ -9250,13 +7002,11 @@ var ts;
             var id = nextToLast.expression;
             if (id.escapedText === "exports" ||
                 id.escapedText === "module" && nextToLast.name.escapedText === "exports") {
-                // exports.name = expr OR module.exports.name = expr
-                return 1 /* ExportsProperty */;
+                return 1;
             }
-            // F.G...x = expr
-            return 5 /* Property */;
+            return 5;
         }
-        return 0 /* None */;
+        return 0;
     }
     ts.getSpecialPropertyAssignmentKind = getSpecialPropertyAssignmentKind;
     function getInitializerOfBinaryExpression(expr) {
@@ -9267,12 +7017,12 @@ var ts;
     }
     ts.getInitializerOfBinaryExpression = getInitializerOfBinaryExpression;
     function isPrototypePropertyAssignment(node) {
-        return ts.isBinaryExpression(node) && getSpecialPropertyAssignmentKind(node) === 3 /* PrototypeProperty */;
+        return ts.isBinaryExpression(node) && getSpecialPropertyAssignmentKind(node) === 3;
     }
     ts.isPrototypePropertyAssignment = isPrototypePropertyAssignment;
     function isSpecialPropertyDeclaration(expr) {
         return isInJavaScriptFile(expr) &&
-            expr.parent && expr.parent.kind === 216 /* ExpressionStatement */ &&
+            expr.parent && expr.parent.kind === 216 &&
             !!ts.getJSDocTypeTag(expr.parent);
     }
     ts.isSpecialPropertyDeclaration = isSpecialPropertyDeclaration;
@@ -9282,14 +7032,14 @@ var ts;
     ts.importFromModuleSpecifier = importFromModuleSpecifier;
     function tryGetImportFromModuleSpecifier(node) {
         switch (node.parent.kind) {
-            case 244 /* ImportDeclaration */:
-            case 250 /* ExportDeclaration */:
+            case 244:
+            case 250:
                 return node.parent;
-            case 254 /* ExternalModuleReference */:
+            case 254:
                 return node.parent.parent;
-            case 187 /* CallExpression */:
+            case 187:
                 return node.parent;
-            case 178 /* LiteralType */:
+            case 178:
                 ts.Debug.assert(ts.isStringLiteral(node));
                 return ts.tryCast(node.parent.parent, ts.isImportTypeNode);
             default:
@@ -9299,12 +7049,12 @@ var ts;
     ts.tryGetImportFromModuleSpecifier = tryGetImportFromModuleSpecifier;
     function getExternalModuleName(node) {
         switch (node.kind) {
-            case 244 /* ImportDeclaration */:
-            case 250 /* ExportDeclaration */:
+            case 244:
+            case 250:
                 return node.moduleSpecifier;
-            case 243 /* ImportEqualsDeclaration */:
-                return node.moduleReference.kind === 254 /* ExternalModuleReference */ ? node.moduleReference.expression : undefined;
-            case 179 /* ImportType */:
+            case 243:
+                return node.moduleReference.kind === 254 ? node.moduleReference.expression : undefined;
+            case 179:
                 return isLiteralImportTypeNode(node) ? node.argument.literal : undefined;
             default:
                 return ts.Debug.assertNever(node);
@@ -9313,11 +7063,11 @@ var ts;
     ts.getExternalModuleName = getExternalModuleName;
     function getNamespaceDeclarationNode(node) {
         switch (node.kind) {
-            case 244 /* ImportDeclaration */:
+            case 244:
                 return node.importClause && ts.tryCast(node.importClause.namedBindings, ts.isNamespaceImport);
-            case 243 /* ImportEqualsDeclaration */:
+            case 243:
                 return node;
-            case 250 /* ExportDeclaration */:
+            case 250:
                 return undefined;
             default:
                 return ts.Debug.assertNever(node);
@@ -9325,19 +7075,19 @@ var ts;
     }
     ts.getNamespaceDeclarationNode = getNamespaceDeclarationNode;
     function isDefaultImport(node) {
-        return node.kind === 244 /* ImportDeclaration */ && !!node.importClause && !!node.importClause.name;
+        return node.kind === 244 && !!node.importClause && !!node.importClause.name;
     }
     ts.isDefaultImport = isDefaultImport;
     function hasQuestionToken(node) {
         if (node) {
             switch (node.kind) {
-                case 149 /* Parameter */:
-                case 154 /* MethodDeclaration */:
-                case 153 /* MethodSignature */:
-                case 271 /* ShorthandPropertyAssignment */:
-                case 270 /* PropertyAssignment */:
-                case 152 /* PropertyDeclaration */:
-                case 151 /* PropertySignature */:
+                case 149:
+                case 154:
+                case 153:
+                case 271:
+                case 270:
+                case 152:
+                case 151:
                     return node.questionToken !== undefined;
             }
         }
@@ -9345,14 +7095,14 @@ var ts;
     }
     ts.hasQuestionToken = hasQuestionToken;
     function isJSDocConstructSignature(node) {
-        return node.kind === 284 /* JSDocFunctionType */ &&
+        return node.kind === 284 &&
             node.parameters.length > 0 &&
             node.parameters[0].name &&
             node.parameters[0].name.escapedText === "new";
     }
     ts.isJSDocConstructSignature = isJSDocConstructSignature;
     function isJSDocTypeAlias(node) {
-        return node.kind === 297 /* JSDocTypedefTag */ || node.kind === 292 /* JSDocCallbackTag */;
+        return node.kind === 297 || node.kind === 292;
     }
     ts.isJSDocTypeAlias = isJSDocTypeAlias;
     function isTypeAlias(node) {
@@ -9362,27 +7112,27 @@ var ts;
     function getSourceOfAssignment(node) {
         return ts.isExpressionStatement(node) &&
             node.expression && ts.isBinaryExpression(node.expression) &&
-            node.expression.operatorToken.kind === 58 /* EqualsToken */
+            node.expression.operatorToken.kind === 58
             ? node.expression.right
             : undefined;
     }
     function getSourceOfDefaultedAssignment(node) {
         return ts.isExpressionStatement(node) &&
             ts.isBinaryExpression(node.expression) &&
-            getSpecialPropertyAssignmentKind(node.expression) !== 0 /* None */ &&
+            getSpecialPropertyAssignmentKind(node.expression) !== 0 &&
             ts.isBinaryExpression(node.expression.right) &&
-            node.expression.right.operatorToken.kind === 54 /* BarBarToken */
+            node.expression.right.operatorToken.kind === 54
             ? node.expression.right.right
             : undefined;
     }
     function getSingleInitializerOfVariableStatementOrPropertyDeclaration(node) {
         switch (node.kind) {
-            case 214 /* VariableStatement */:
+            case 214:
                 var v = getSingleVariableOfVariableStatement(node);
                 return v && v.initializer;
-            case 152 /* PropertyDeclaration */:
+            case 152:
                 return node.initializer;
-            case 270 /* PropertyAssignment */:
+            case 270:
                 return node.initializer;
         }
     }
@@ -9392,7 +7142,7 @@ var ts;
     function getNestedModuleDeclaration(node) {
         return ts.isModuleDeclaration(node) &&
             node.body &&
-            node.body.kind === 239 /* ModuleDeclaration */
+            node.body.kind === 239
             ? node.body
             : undefined;
     }
@@ -9404,15 +7154,9 @@ var ts;
             var parent = node.parent;
             if (!parent)
                 return;
-            if (parent.kind === 270 /* PropertyAssignment */ || parent.kind === 152 /* PropertyDeclaration */ || getNestedModuleDeclaration(parent)) {
+            if (parent.kind === 270 || parent.kind === 152 || getNestedModuleDeclaration(parent)) {
                 getJSDocCommentsAndTagsWorker(parent);
             }
-            // Try to recognize this pattern when node is initializer of variable declaration and JSDoc comments are on containing variable statement.
-            // /**
-            //   * @param {number} name
-            //   * @returns {number}
-            //   */
-            // var x = function(name) { return name.length; }
             if (parent.parent && (getSingleVariableOfVariableStatement(parent.parent) === node)) {
                 getJSDocCommentsAndTagsWorker(parent.parent);
             }
@@ -9422,13 +7166,12 @@ var ts;
                     getSourceOfDefaultedAssignment(parent.parent.parent))) {
                 getJSDocCommentsAndTagsWorker(parent.parent.parent);
             }
-            if (ts.isBinaryExpression(node) && node.operatorToken.kind === 58 /* EqualsToken */ ||
-                ts.isBinaryExpression(parent) && parent.operatorToken.kind === 58 /* EqualsToken */ ||
-                node.kind === 185 /* PropertyAccessExpression */ && node.parent && node.parent.kind === 216 /* ExpressionStatement */) {
+            if (ts.isBinaryExpression(node) && node.operatorToken.kind === 58 ||
+                ts.isBinaryExpression(parent) && parent.operatorToken.kind === 58 ||
+                node.kind === 185 && node.parent && node.parent.kind === 216) {
                 getJSDocCommentsAndTagsWorker(parent);
             }
-            // Pull parameter comments from declaring function as well
-            if (node.kind === 149 /* Parameter */) {
+            if (node.kind === 149) {
                 result = ts.addRange(result, ts.getJSDocParameterTags(node));
             }
             if (isVariableLike(node) && ts.hasInitializer(node) && node.initializer !== hostNode && ts.hasJSDocNodes(node.initializer)) {
@@ -9440,7 +7183,6 @@ var ts;
         }
     }
     ts.getJSDocCommentsAndTags = getJSDocCommentsAndTags;
-    /** Does the opposite of `getJSDocParameterTags`: given a JSDoc parameter, finds the parameter corresponding to it. */
     function getParameterSymbolFromJSDoc(node) {
         if (node.symbol) {
             return node.symbol;
@@ -9453,7 +7195,7 @@ var ts;
         if (!decl) {
             return undefined;
         }
-        var parameter = ts.find(decl.parameters, function (p) { return p.name.kind === 71 /* Identifier */ && p.name.escapedText === name; });
+        var parameter = ts.find(decl.parameters, function (p) { return p.name.kind === 71 && p.name.escapedText === name; });
         return parameter && parameter.symbol;
     }
     ts.getParameterSymbolFromJSDoc = getParameterSymbolFromJSDoc;
@@ -9488,86 +7230,72 @@ var ts;
     ts.hasRestParameter = hasRestParameter;
     function isRestParameter(node) {
         var type = ts.isJSDocParameterTag(node) ? (node.typeExpression && node.typeExpression.type) : node.type;
-        return node.dotDotDotToken !== undefined || !!type && type.kind === 285 /* JSDocVariadicType */;
+        return node.dotDotDotToken !== undefined || !!type && type.kind === 285;
     }
     ts.isRestParameter = isRestParameter;
-    var AssignmentKind;
-    (function (AssignmentKind) {
-        AssignmentKind[AssignmentKind["None"] = 0] = "None";
-        AssignmentKind[AssignmentKind["Definite"] = 1] = "Definite";
-        AssignmentKind[AssignmentKind["Compound"] = 2] = "Compound";
-    })(AssignmentKind = ts.AssignmentKind || (ts.AssignmentKind = {}));
     function getAssignmentTargetKind(node) {
         var parent = node.parent;
         while (true) {
             switch (parent.kind) {
-                case 200 /* BinaryExpression */:
+                case 200:
                     var binaryOperator = parent.operatorToken.kind;
                     return isAssignmentOperator(binaryOperator) && parent.left === node ?
-                        binaryOperator === 58 /* EqualsToken */ ? 1 /* Definite */ : 2 /* Compound */ :
-                        0 /* None */;
-                case 198 /* PrefixUnaryExpression */:
-                case 199 /* PostfixUnaryExpression */:
+                        binaryOperator === 58 ? 1 : 2 :
+                        0;
+                case 198:
+                case 199:
                     var unaryOperator = parent.operator;
-                    return unaryOperator === 43 /* PlusPlusToken */ || unaryOperator === 44 /* MinusMinusToken */ ? 2 /* Compound */ : 0 /* None */;
-                case 221 /* ForInStatement */:
-                case 222 /* ForOfStatement */:
-                    return parent.initializer === node ? 1 /* Definite */ : 0 /* None */;
-                case 191 /* ParenthesizedExpression */:
-                case 183 /* ArrayLiteralExpression */:
-                case 204 /* SpreadElement */:
-                case 209 /* NonNullExpression */:
+                    return unaryOperator === 43 || unaryOperator === 44 ? 2 : 0;
+                case 221:
+                case 222:
+                    return parent.initializer === node ? 1 : 0;
+                case 191:
+                case 183:
+                case 204:
+                case 209:
                     node = parent;
                     break;
-                case 271 /* ShorthandPropertyAssignment */:
+                case 271:
                     if (parent.name !== node) {
-                        return 0 /* None */;
+                        return 0;
                     }
                     node = parent.parent;
                     break;
-                case 270 /* PropertyAssignment */:
+                case 270:
                     if (parent.name === node) {
-                        return 0 /* None */;
+                        return 0;
                     }
                     node = parent.parent;
                     break;
                 default:
-                    return 0 /* None */;
+                    return 0;
             }
             parent = node.parent;
         }
     }
     ts.getAssignmentTargetKind = getAssignmentTargetKind;
-    // A node is an assignment target if it is on the left hand side of an '=' token, if it is parented by a property
-    // assignment in an object literal that is an assignment target, or if it is parented by an array literal that is
-    // an assignment target. Examples include 'a = xxx', '{ p: a } = xxx', '[{ a }] = xxx'.
-    // (Note that `p` is not a target in the above examples, only `a`.)
     function isAssignmentTarget(node) {
-        return getAssignmentTargetKind(node) !== 0 /* None */;
+        return getAssignmentTargetKind(node) !== 0;
     }
     ts.isAssignmentTarget = isAssignmentTarget;
-    /**
-     * Indicates whether a node could contain a `var` VariableDeclarationList that contributes to
-     * the same `var` declaration scope as the node's parent.
-     */
     function isNodeWithPossibleHoistedDeclaration(node) {
         switch (node.kind) {
-            case 213 /* Block */:
-            case 214 /* VariableStatement */:
-            case 226 /* WithStatement */:
-            case 217 /* IfStatement */:
-            case 227 /* SwitchStatement */:
-            case 241 /* CaseBlock */:
-            case 266 /* CaseClause */:
-            case 267 /* DefaultClause */:
-            case 228 /* LabeledStatement */:
-            case 220 /* ForStatement */:
-            case 221 /* ForInStatement */:
-            case 222 /* ForOfStatement */:
-            case 218 /* DoStatement */:
-            case 219 /* WhileStatement */:
-            case 230 /* TryStatement */:
-            case 269 /* CatchClause */:
+            case 213:
+            case 214:
+            case 226:
+            case 217:
+            case 227:
+            case 241:
+            case 266:
+            case 267:
+            case 228:
+            case 220:
+            case 221:
+            case 222:
+            case 218:
+            case 219:
+            case 230:
+            case 269:
                 return true;
         }
         return false;
@@ -9584,27 +7312,26 @@ var ts;
         return node;
     }
     function walkUpParenthesizedTypes(node) {
-        return walkUp(node, 173 /* ParenthesizedType */);
+        return walkUp(node, 173);
     }
     ts.walkUpParenthesizedTypes = walkUpParenthesizedTypes;
     function walkUpParenthesizedExpressions(node) {
-        return walkUp(node, 191 /* ParenthesizedExpression */);
+        return walkUp(node, 191);
     }
     ts.walkUpParenthesizedExpressions = walkUpParenthesizedExpressions;
     function skipParentheses(node) {
-        while (node.kind === 191 /* ParenthesizedExpression */) {
+        while (node.kind === 191) {
             node = node.expression;
         }
         return node;
     }
     ts.skipParentheses = skipParentheses;
-    // a node is delete target iff. it is PropertyAccessExpression/ElementAccessExpression with parentheses skipped
     function isDeleteTarget(node) {
-        if (node.kind !== 185 /* PropertyAccessExpression */ && node.kind !== 186 /* ElementAccessExpression */) {
+        if (node.kind !== 185 && node.kind !== 186) {
             return false;
         }
         node = walkUpParenthesizedExpressions(node.parent);
-        return node && node.kind === 194 /* DeleteExpression */;
+        return node && node.kind === 194;
     }
     ts.isDeleteTarget = isDeleteTarget;
     function isNodeDescendantOf(node, ancestor) {
@@ -9616,17 +7343,15 @@ var ts;
         return false;
     }
     ts.isNodeDescendantOf = isNodeDescendantOf;
-    // True if `name` is the name of a declaration node
     function isDeclarationName(name) {
         return !ts.isSourceFile(name) && !ts.isBindingPattern(name) && ts.isDeclaration(name.parent) && name.parent.name === name;
     }
     ts.isDeclarationName = isDeclarationName;
-    // See GH#16030
     function isAnyDeclarationName(name) {
         switch (name.kind) {
-            case 71 /* Identifier */:
-            case 9 /* StringLiteral */:
-            case 8 /* NumericLiteral */: {
+            case 71:
+            case 9:
+            case 8: {
                 var parent = name.parent;
                 if (ts.isDeclaration(parent)) {
                     return parent.name === name;
@@ -9637,7 +7362,7 @@ var ts;
                 }
                 else {
                     var binExp = name.parent.parent;
-                    return ts.isBinaryExpression(binExp) && getSpecialPropertyAssignmentKind(binExp) !== 0 /* None */ && ts.getNameOfDeclaration(binExp) === name;
+                    return ts.isBinaryExpression(binExp) && getSpecialPropertyAssignmentKind(binExp) !== 0 && ts.getNameOfDeclaration(binExp) === name;
                 }
             }
             default:
@@ -9646,64 +7371,51 @@ var ts;
     }
     ts.isAnyDeclarationName = isAnyDeclarationName;
     function isLiteralComputedPropertyDeclarationName(node) {
-        return (node.kind === 9 /* StringLiteral */ || node.kind === 8 /* NumericLiteral */) &&
-            node.parent.kind === 147 /* ComputedPropertyName */ &&
+        return (node.kind === 9 || node.kind === 8) &&
+            node.parent.kind === 147 &&
             ts.isDeclaration(node.parent.parent);
     }
     ts.isLiteralComputedPropertyDeclarationName = isLiteralComputedPropertyDeclarationName;
-    // Return true if the given identifier is classified as an IdentifierName
     function isIdentifierName(node) {
         var parent = node.parent;
         switch (parent.kind) {
-            case 152 /* PropertyDeclaration */:
-            case 151 /* PropertySignature */:
-            case 154 /* MethodDeclaration */:
-            case 153 /* MethodSignature */:
-            case 156 /* GetAccessor */:
-            case 157 /* SetAccessor */:
-            case 273 /* EnumMember */:
-            case 270 /* PropertyAssignment */:
-            case 185 /* PropertyAccessExpression */:
-                // Name in member declaration or property name in property access
+            case 152:
+            case 151:
+            case 154:
+            case 153:
+            case 156:
+            case 157:
+            case 273:
+            case 270:
+            case 185:
                 return parent.name === node;
-            case 146 /* QualifiedName */:
-                // Name on right hand side of dot in a type query or type reference
+            case 146:
                 if (parent.right === node) {
-                    while (parent.kind === 146 /* QualifiedName */) {
+                    while (parent.kind === 146) {
                         parent = parent.parent;
                     }
-                    return parent.kind === 165 /* TypeQuery */ || parent.kind === 162 /* TypeReference */;
+                    return parent.kind === 165 || parent.kind === 162;
                 }
                 return false;
-            case 182 /* BindingElement */:
-            case 248 /* ImportSpecifier */:
-                // Property name in binding element or import specifier
+            case 182:
+            case 248:
                 return parent.propertyName === node;
-            case 252 /* ExportSpecifier */:
-            case 262 /* JsxAttribute */:
-                // Any name in an export specifier or JSX Attribute
+            case 252:
+            case 262:
                 return true;
         }
         return false;
     }
     ts.isIdentifierName = isIdentifierName;
-    // An alias symbol is created by one of the following declarations:
-    // import <symbol> = ...
-    // import <symbol> from ...
-    // import * as <symbol> from ...
-    // import { x as <symbol> } from ...
-    // export { x as <symbol> } from ...
-    // export = <EntityNameExpression>
-    // export default <EntityNameExpression>
     function isAliasSymbolDeclaration(node) {
-        return node.kind === 243 /* ImportEqualsDeclaration */ ||
-            node.kind === 242 /* NamespaceExportDeclaration */ ||
-            node.kind === 245 /* ImportClause */ && !!node.name ||
-            node.kind === 246 /* NamespaceImport */ ||
-            node.kind === 248 /* ImportSpecifier */ ||
-            node.kind === 252 /* ExportSpecifier */ ||
-            node.kind === 249 /* ExportAssignment */ && exportAssignmentIsAlias(node) ||
-            ts.isBinaryExpression(node) && getSpecialPropertyAssignmentKind(node) === 2 /* ModuleExports */;
+        return node.kind === 243 ||
+            node.kind === 242 ||
+            node.kind === 245 && !!node.name ||
+            node.kind === 246 ||
+            node.kind === 248 ||
+            node.kind === 252 ||
+            node.kind === 249 && exportAssignmentIsAlias(node) ||
+            ts.isBinaryExpression(node) && getSpecialPropertyAssignmentKind(node) === 2;
     }
     ts.isAliasSymbolDeclaration = isAliasSymbolDeclaration;
     function exportAssignmentIsAlias(node) {
@@ -9712,16 +7424,15 @@ var ts;
     }
     ts.exportAssignmentIsAlias = exportAssignmentIsAlias;
     function getClassExtendsHeritageClauseElement(node) {
-        var heritageClause = getHeritageClause(node.heritageClauses, 85 /* ExtendsKeyword */);
+        var heritageClause = getHeritageClause(node.heritageClauses, 85);
         return heritageClause && heritageClause.types.length > 0 ? heritageClause.types[0] : undefined;
     }
     ts.getClassExtendsHeritageClauseElement = getClassExtendsHeritageClauseElement;
     function getClassImplementsHeritageClauseElements(node) {
-        var heritageClause = getHeritageClause(node.heritageClauses, 108 /* ImplementsKeyword */);
+        var heritageClause = getHeritageClause(node.heritageClauses, 108);
         return heritageClause ? heritageClause.types : undefined;
     }
     ts.getClassImplementsHeritageClauseElements = getClassImplementsHeritageClauseElements;
-    /** Returns the node in an `extends` or `implements` clause of a class or interface. */
     function getAllSuperTypeNodes(node) {
         return ts.isInterfaceDeclaration(node) ? getInterfaceBaseTypeNodes(node) || ts.emptyArray
             : ts.isClassLike(node) ? ts.concatenate(ts.singleElementArray(getClassExtendsHeritageClauseElement(node)), getClassImplementsHeritageClauseElements(node)) || ts.emptyArray
@@ -9729,7 +7440,7 @@ var ts;
     }
     ts.getAllSuperTypeNodes = getAllSuperTypeNodes;
     function getInterfaceBaseTypeNodes(node) {
-        var heritageClause = getHeritageClause(node.heritageClauses, 85 /* ExtendsKeyword */);
+        var heritageClause = getHeritageClause(node.heritageClauses, 85);
         return heritageClause ? heritageClause.types : undefined;
     }
     ts.getInterfaceBaseTypeNodes = getInterfaceBaseTypeNodes;
@@ -9763,11 +7474,11 @@ var ts;
     }
     ts.getAncestor = getAncestor;
     function isKeyword(token) {
-        return 72 /* FirstKeyword */ <= token && token <= 145 /* LastKeyword */;
+        return 72 <= token && token <= 145;
     }
     ts.isKeyword = isKeyword;
     function isContextualKeyword(token) {
-        return 117 /* FirstContextualKeyword */ <= token && token <= 145 /* LastContextualKeyword */;
+        return 117 <= token && token <= 145;
     }
     ts.isContextualKeyword = isContextualKeyword;
     function isNonContextualKeyword(token) {
@@ -9780,101 +7491,80 @@ var ts;
     }
     ts.isStringANonContextualKeyword = isStringANonContextualKeyword;
     function isTrivia(token) {
-        return 2 /* FirstTriviaToken */ <= token && token <= 7 /* LastTriviaToken */;
+        return 2 <= token && token <= 7;
     }
     ts.isTrivia = isTrivia;
-    var FunctionFlags;
-    (function (FunctionFlags) {
-        FunctionFlags[FunctionFlags["Normal"] = 0] = "Normal";
-        FunctionFlags[FunctionFlags["Generator"] = 1] = "Generator";
-        FunctionFlags[FunctionFlags["Async"] = 2] = "Async";
-        FunctionFlags[FunctionFlags["Invalid"] = 4] = "Invalid";
-        FunctionFlags[FunctionFlags["AsyncGenerator"] = 3] = "AsyncGenerator";
-    })(FunctionFlags = ts.FunctionFlags || (ts.FunctionFlags = {}));
     function getFunctionFlags(node) {
         if (!node) {
-            return 4 /* Invalid */;
+            return 4;
         }
-        var flags = 0 /* Normal */;
+        var flags = 0;
         switch (node.kind) {
-            case 234 /* FunctionDeclaration */:
-            case 192 /* FunctionExpression */:
-            case 154 /* MethodDeclaration */:
+            case 234:
+            case 192:
+            case 154:
                 if (node.asteriskToken) {
-                    flags |= 1 /* Generator */;
+                    flags |= 1;
                 }
-            // falls through
-            case 193 /* ArrowFunction */:
-                if (hasModifier(node, 256 /* Async */)) {
-                    flags |= 2 /* Async */;
+            case 193:
+                if (hasModifier(node, 256)) {
+                    flags |= 2;
                 }
                 break;
         }
         if (!node.body) {
-            flags |= 4 /* Invalid */;
+            flags |= 4;
         }
         return flags;
     }
     ts.getFunctionFlags = getFunctionFlags;
     function isAsyncFunction(node) {
         switch (node.kind) {
-            case 234 /* FunctionDeclaration */:
-            case 192 /* FunctionExpression */:
-            case 193 /* ArrowFunction */:
-            case 154 /* MethodDeclaration */:
+            case 234:
+            case 192:
+            case 193:
+            case 154:
                 return node.body !== undefined
                     && node.asteriskToken === undefined
-                    && hasModifier(node, 256 /* Async */);
+                    && hasModifier(node, 256);
         }
         return false;
     }
     ts.isAsyncFunction = isAsyncFunction;
     function isStringOrNumericLiteral(node) {
         var kind = node.kind;
-        return kind === 9 /* StringLiteral */
-            || kind === 8 /* NumericLiteral */;
+        return kind === 9
+            || kind === 8;
     }
     ts.isStringOrNumericLiteral = isStringOrNumericLiteral;
-    /**
-     * A declaration has a dynamic name if both of the following are true:
-     *   1. The declaration has a computed property name
-     *   2. The computed name is *not* expressed as Symbol.<name>, where name
-     *      is a property of the Symbol constructor that denotes a built in
-     *      Symbol.
-     */
     function hasDynamicName(declaration) {
         var name = ts.getNameOfDeclaration(declaration);
         return !!name && isDynamicName(name);
     }
     ts.hasDynamicName = hasDynamicName;
     function isDynamicName(name) {
-        return name.kind === 147 /* ComputedPropertyName */ &&
+        return name.kind === 147 &&
             !isStringOrNumericLiteral(name.expression) &&
             !isWellKnownSymbolSyntactically(name.expression);
     }
     ts.isDynamicName = isDynamicName;
-    /**
-     * Checks if the expression is of the form:
-     *    Symbol.name
-     * where Symbol is literally the word "Symbol", and name is any identifierName
-     */
     function isWellKnownSymbolSyntactically(node) {
         return ts.isPropertyAccessExpression(node) && isESSymbolIdentifier(node.expression);
     }
     ts.isWellKnownSymbolSyntactically = isWellKnownSymbolSyntactically;
     function getPropertyNameForPropertyNameNode(name) {
-        if (name.kind === 71 /* Identifier */) {
+        if (name.kind === 71) {
             return name.escapedText;
         }
-        if (name.kind === 9 /* StringLiteral */ || name.kind === 8 /* NumericLiteral */) {
+        if (name.kind === 9 || name.kind === 8) {
             return escapeLeadingUnderscores(name.text);
         }
-        if (name.kind === 147 /* ComputedPropertyName */) {
+        if (name.kind === 147) {
             var nameExpression = name.expression;
             if (isWellKnownSymbolSyntactically(nameExpression)) {
                 return getPropertyNameForKnownSymbolName(ts.idText(nameExpression.name));
             }
-            else if (nameExpression.kind === 9 /* StringLiteral */ || nameExpression.kind === 8 /* NumericLiteral */) {
+            else if (nameExpression.kind === 9 || nameExpression.kind === 8) {
                 return escapeLeadingUnderscores(nameExpression.text);
             }
         }
@@ -9883,10 +7573,10 @@ var ts;
     ts.getPropertyNameForPropertyNameNode = getPropertyNameForPropertyNameNode;
     function isPropertyNameLiteral(node) {
         switch (node.kind) {
-            case 71 /* Identifier */:
-            case 9 /* StringLiteral */:
-            case 13 /* NoSubstitutionTemplateLiteral */:
-            case 8 /* NumericLiteral */:
+            case 71:
+            case 9:
+            case 13:
+            case 8:
                 return true;
             default:
                 return false;
@@ -9894,11 +7584,11 @@ var ts;
     }
     ts.isPropertyNameLiteral = isPropertyNameLiteral;
     function getTextOfIdentifierOrLiteral(node) {
-        return node.kind === 71 /* Identifier */ ? ts.idText(node) : node.text;
+        return node.kind === 71 ? ts.idText(node) : node.text;
     }
     ts.getTextOfIdentifierOrLiteral = getTextOfIdentifierOrLiteral;
     function getEscapedTextOfIdentifierOrLiteral(node) {
-        return node.kind === 71 /* Identifier */ ? node.escapedText : escapeLeadingUnderscores(node.text);
+        return node.kind === 71 ? node.escapedText : escapeLeadingUnderscores(node.text);
     }
     ts.getEscapedTextOfIdentifierOrLiteral = getEscapedTextOfIdentifierOrLiteral;
     function getPropertyNameForKnownSymbolName(symbolName) {
@@ -9909,11 +7599,8 @@ var ts;
         return ts.startsWith(symbol.escapedName, "__@");
     }
     ts.isKnownSymbol = isKnownSymbol;
-    /**
-     * Includes the word "Symbol" with unicode escapes
-     */
     function isESSymbolIdentifier(node) {
-        return node.kind === 71 /* Identifier */ && node.escapedText === "Symbol";
+        return node.kind === 71 && node.escapedText === "Symbol";
     }
     ts.isESSymbolIdentifier = isESSymbolIdentifier;
     function isPushOrUnshiftIdentifier(node) {
@@ -9922,11 +7609,11 @@ var ts;
     ts.isPushOrUnshiftIdentifier = isPushOrUnshiftIdentifier;
     function isParameterDeclaration(node) {
         var root = getRootDeclaration(node);
-        return root.kind === 149 /* Parameter */;
+        return root.kind === 149;
     }
     ts.isParameterDeclaration = isParameterDeclaration;
     function getRootDeclaration(node) {
-        while (node.kind === 182 /* BindingElement */) {
+        while (node.kind === 182) {
             node = node.parent.parent;
         }
         return node;
@@ -9934,15 +7621,15 @@ var ts;
     ts.getRootDeclaration = getRootDeclaration;
     function nodeStartsNewLexicalEnvironment(node) {
         var kind = node.kind;
-        return kind === 155 /* Constructor */
-            || kind === 192 /* FunctionExpression */
-            || kind === 234 /* FunctionDeclaration */
-            || kind === 193 /* ArrowFunction */
-            || kind === 154 /* MethodDeclaration */
-            || kind === 156 /* GetAccessor */
-            || kind === 157 /* SetAccessor */
-            || kind === 239 /* ModuleDeclaration */
-            || kind === 274 /* SourceFile */;
+        return kind === 155
+            || kind === 192
+            || kind === 234
+            || kind === 193
+            || kind === 154
+            || kind === 156
+            || kind === 157
+            || kind === 239
+            || kind === 274;
     }
     ts.nodeStartsNewLexicalEnvironment = nodeStartsNewLexicalEnvironment;
     function nodeIsSynthesized(range) {
@@ -9954,62 +7641,57 @@ var ts;
         return ts.getParseTreeNode(sourceFile, ts.isSourceFile) || sourceFile;
     }
     ts.getOriginalSourceFile = getOriginalSourceFile;
-    var Associativity;
-    (function (Associativity) {
-        Associativity[Associativity["Left"] = 0] = "Left";
-        Associativity[Associativity["Right"] = 1] = "Right";
-    })(Associativity = ts.Associativity || (ts.Associativity = {}));
     function getExpressionAssociativity(expression) {
         var operator = getOperator(expression);
-        var hasArguments = expression.kind === 188 /* NewExpression */ && expression.arguments !== undefined;
+        var hasArguments = expression.kind === 188 && expression.arguments !== undefined;
         return getOperatorAssociativity(expression.kind, operator, hasArguments);
     }
     ts.getExpressionAssociativity = getExpressionAssociativity;
     function getOperatorAssociativity(kind, operator, hasArguments) {
         switch (kind) {
-            case 188 /* NewExpression */:
-                return hasArguments ? 0 /* Left */ : 1 /* Right */;
-            case 198 /* PrefixUnaryExpression */:
-            case 195 /* TypeOfExpression */:
-            case 196 /* VoidExpression */:
-            case 194 /* DeleteExpression */:
-            case 197 /* AwaitExpression */:
-            case 201 /* ConditionalExpression */:
-            case 203 /* YieldExpression */:
-                return 1 /* Right */;
-            case 200 /* BinaryExpression */:
+            case 188:
+                return hasArguments ? 0 : 1;
+            case 198:
+            case 195:
+            case 196:
+            case 194:
+            case 197:
+            case 201:
+            case 203:
+                return 1;
+            case 200:
                 switch (operator) {
-                    case 40 /* AsteriskAsteriskToken */:
-                    case 58 /* EqualsToken */:
-                    case 59 /* PlusEqualsToken */:
-                    case 60 /* MinusEqualsToken */:
-                    case 62 /* AsteriskAsteriskEqualsToken */:
-                    case 61 /* AsteriskEqualsToken */:
-                    case 63 /* SlashEqualsToken */:
-                    case 64 /* PercentEqualsToken */:
-                    case 65 /* LessThanLessThanEqualsToken */:
-                    case 66 /* GreaterThanGreaterThanEqualsToken */:
-                    case 67 /* GreaterThanGreaterThanGreaterThanEqualsToken */:
-                    case 68 /* AmpersandEqualsToken */:
-                    case 70 /* CaretEqualsToken */:
-                    case 69 /* BarEqualsToken */:
-                        return 1 /* Right */;
-                }
-        }
-        return 0 /* Left */;
+                    case 40:
+                    case 58:
+                    case 59:
+                    case 60:
+                    case 62:
+                    case 61:
+                    case 63:
+                    case 64:
+                    case 65:
+                    case 66:
+                    case 67:
+                    case 68:
+                    case 70:
+                    case 69:
+                        return 1;
+                }
+        }
+        return 0;
     }
     ts.getOperatorAssociativity = getOperatorAssociativity;
     function getExpressionPrecedence(expression) {
         var operator = getOperator(expression);
-        var hasArguments = expression.kind === 188 /* NewExpression */ && expression.arguments !== undefined;
+        var hasArguments = expression.kind === 188 && expression.arguments !== undefined;
         return getOperatorPrecedence(expression.kind, operator, hasArguments);
     }
     ts.getExpressionPrecedence = getExpressionPrecedence;
     function getOperator(expression) {
-        if (expression.kind === 200 /* BinaryExpression */) {
+        if (expression.kind === 200) {
             return expression.operatorToken.kind;
         }
-        else if (expression.kind === 198 /* PrefixUnaryExpression */ || expression.kind === 199 /* PostfixUnaryExpression */) {
+        else if (expression.kind === 198 || expression.kind === 199) {
             return expression.operator;
         }
         else {
@@ -10019,125 +7701,122 @@ var ts;
     ts.getOperator = getOperator;
     function getOperatorPrecedence(nodeKind, operatorKind, hasArguments) {
         switch (nodeKind) {
-            case 302 /* CommaListExpression */:
+            case 302:
                 return 0;
-            case 204 /* SpreadElement */:
+            case 204:
                 return 1;
-            case 203 /* YieldExpression */:
+            case 203:
                 return 2;
-            case 201 /* ConditionalExpression */:
+            case 201:
                 return 4;
-            case 200 /* BinaryExpression */:
+            case 200:
                 switch (operatorKind) {
-                    case 26 /* CommaToken */:
+                    case 26:
                         return 0;
-                    case 58 /* EqualsToken */:
-                    case 59 /* PlusEqualsToken */:
-                    case 60 /* MinusEqualsToken */:
-                    case 62 /* AsteriskAsteriskEqualsToken */:
-                    case 61 /* AsteriskEqualsToken */:
-                    case 63 /* SlashEqualsToken */:
-                    case 64 /* PercentEqualsToken */:
-                    case 65 /* LessThanLessThanEqualsToken */:
-                    case 66 /* GreaterThanGreaterThanEqualsToken */:
-                    case 67 /* GreaterThanGreaterThanGreaterThanEqualsToken */:
-                    case 68 /* AmpersandEqualsToken */:
-                    case 70 /* CaretEqualsToken */:
-                    case 69 /* BarEqualsToken */:
+                    case 58:
+                    case 59:
+                    case 60:
+                    case 62:
+                    case 61:
+                    case 63:
+                    case 64:
+                    case 65:
+                    case 66:
+                    case 67:
+                    case 68:
+                    case 70:
+                    case 69:
                         return 3;
                     default:
                         return getBinaryOperatorPrecedence(operatorKind);
                 }
-            case 198 /* PrefixUnaryExpression */:
-            case 195 /* TypeOfExpression */:
-            case 196 /* VoidExpression */:
-            case 194 /* DeleteExpression */:
-            case 197 /* AwaitExpression */:
+            case 198:
+            case 195:
+            case 196:
+            case 194:
+            case 197:
                 return 16;
-            case 199 /* PostfixUnaryExpression */:
+            case 199:
                 return 17;
-            case 187 /* CallExpression */:
+            case 187:
                 return 18;
-            case 188 /* NewExpression */:
+            case 188:
                 return hasArguments ? 19 : 18;
-            case 189 /* TaggedTemplateExpression */:
-            case 185 /* PropertyAccessExpression */:
-            case 186 /* ElementAccessExpression */:
+            case 189:
+            case 185:
+            case 186:
                 return 19;
-            case 99 /* ThisKeyword */:
-            case 97 /* SuperKeyword */:
-            case 71 /* Identifier */:
-            case 95 /* NullKeyword */:
-            case 101 /* TrueKeyword */:
-            case 86 /* FalseKeyword */:
-            case 8 /* NumericLiteral */:
-            case 9 /* StringLiteral */:
-            case 183 /* ArrayLiteralExpression */:
-            case 184 /* ObjectLiteralExpression */:
-            case 192 /* FunctionExpression */:
-            case 193 /* ArrowFunction */:
-            case 205 /* ClassExpression */:
-            case 255 /* JsxElement */:
-            case 256 /* JsxSelfClosingElement */:
-            case 259 /* JsxFragment */:
-            case 12 /* RegularExpressionLiteral */:
-            case 13 /* NoSubstitutionTemplateLiteral */:
-            case 202 /* TemplateExpression */:
-            case 191 /* ParenthesizedExpression */:
-            case 206 /* OmittedExpression */:
+            case 99:
+            case 97:
+            case 71:
+            case 95:
+            case 101:
+            case 86:
+            case 8:
+            case 9:
+            case 183:
+            case 184:
+            case 192:
+            case 193:
+            case 205:
+            case 255:
+            case 256:
+            case 259:
+            case 12:
+            case 13:
+            case 202:
+            case 191:
+            case 206:
                 return 20;
             default:
                 return -1;
         }
     }
     ts.getOperatorPrecedence = getOperatorPrecedence;
-    /* @internal */
     function getBinaryOperatorPrecedence(kind) {
         switch (kind) {
-            case 54 /* BarBarToken */:
+            case 54:
                 return 5;
-            case 53 /* AmpersandAmpersandToken */:
+            case 53:
                 return 6;
-            case 49 /* BarToken */:
+            case 49:
                 return 7;
-            case 50 /* CaretToken */:
+            case 50:
                 return 8;
-            case 48 /* AmpersandToken */:
+            case 48:
                 return 9;
-            case 32 /* EqualsEqualsToken */:
-            case 33 /* ExclamationEqualsToken */:
-            case 34 /* EqualsEqualsEqualsToken */:
-            case 35 /* ExclamationEqualsEqualsToken */:
+            case 32:
+            case 33:
+            case 34:
+            case 35:
                 return 10;
-            case 27 /* LessThanToken */:
-            case 29 /* GreaterThanToken */:
-            case 30 /* LessThanEqualsToken */:
-            case 31 /* GreaterThanEqualsToken */:
-            case 93 /* InstanceOfKeyword */:
-            case 92 /* InKeyword */:
-            case 118 /* AsKeyword */:
+            case 27:
+            case 29:
+            case 30:
+            case 31:
+            case 93:
+            case 92:
+            case 118:
                 return 11;
-            case 45 /* LessThanLessThanToken */:
-            case 46 /* GreaterThanGreaterThanToken */:
-            case 47 /* GreaterThanGreaterThanGreaterThanToken */:
+            case 45:
+            case 46:
+            case 47:
                 return 12;
-            case 37 /* PlusToken */:
-            case 38 /* MinusToken */:
+            case 37:
+            case 38:
                 return 13;
-            case 39 /* AsteriskToken */:
-            case 41 /* SlashToken */:
-            case 42 /* PercentToken */:
+            case 39:
+            case 41:
+            case 42:
                 return 14;
-            case 40 /* AsteriskAsteriskToken */:
+            case 40:
                 return 15;
         }
-        // -1 is lower than all other precedences.  Returning it will cause binary expression
-        // parsing to stop.
         return -1;
     }
     ts.getBinaryOperatorPrecedence = getBinaryOperatorPrecedence;
     function createDiagnosticCollection() {
-        var nonFileDiagnostics = []; // See GH#19873
+        var nonFileDiagnostics = [];
         var filesWithDiagnostics = [];
         var fileDiagnostics = ts.createMap();
         var hasReadNonFileDiagnostics = false;
@@ -10155,13 +7834,12 @@ var ts;
             if (diagnostic.file) {
                 diagnostics = fileDiagnostics.get(diagnostic.file.fileName);
                 if (!diagnostics) {
-                    diagnostics = []; // See GH#19873
+                    diagnostics = [];
                     fileDiagnostics.set(diagnostic.file.fileName, diagnostics);
                     ts.insertSorted(filesWithDiagnostics, diagnostic.file.fileName, ts.compareStringsCaseSensitive);
                 }
             }
             else {
-                // If we've already read the non-file diagnostics, do not modify the existing array.
                 if (hasReadNonFileDiagnostics) {
                     hasReadNonFileDiagnostics = false;
                     nonFileDiagnostics = nonFileDiagnostics.slice();
@@ -10187,11 +7865,6 @@ var ts;
         }
     }
     ts.createDiagnosticCollection = createDiagnosticCollection;
-    // This consists of the first 19 unprintable ASCII characters, canonical escapes, lineSeparator,
-    // paragraphSeparator, and nextLine. The latter three are just desirable to suppress new lines in
-    // the language service. These characters should be escaped when printing, and if any characters are added,
-    // the map below must be updated. Note that this regexp *does not* include the 'delete' character.
-    // There is no reason for this other than that JSON.stringify does not handle it either.
     var doubleQuoteEscapedCharsRegExp = /[\\\"\u0000-\u001f\t\v\f\b\r\n\u2028\u2029\u0085]/g;
     var singleQuoteEscapedCharsRegExp = /[\\\'\u0000-\u001f\t\v\f\b\r\n\u2028\u2029\u0085]/g;
     var backtickQuoteEscapedCharsRegExp = /[\\\`\u0000-\u001f\t\v\f\b\r\n\u2028\u2029\u0085]/g;
@@ -10208,35 +7881,28 @@ var ts;
         "\`": "\\\`",
         "\u2028": "\\u2028",
         "\u2029": "\\u2029",
-        "\u0085": "\\u0085" // nextLine
+        "\u0085": "\\u0085"
     });
-    /**
-     * Based heavily on the abstract 'Quote'/'QuoteJSONString' operation from ECMA-262 (24.3.2.2),
-     * but augmented for a few select characters (e.g. lineSeparator, paragraphSeparator, nextLine)
-     * Note that this doesn't actually wrap the input in double quotes.
-     */
     function escapeString(s, quoteChar) {
-        var escapedCharsRegExp = quoteChar === 96 /* backtick */ ? backtickQuoteEscapedCharsRegExp :
-            quoteChar === 39 /* singleQuote */ ? singleQuoteEscapedCharsRegExp :
+        var escapedCharsRegExp = quoteChar === 96 ? backtickQuoteEscapedCharsRegExp :
+            quoteChar === 39 ? singleQuoteEscapedCharsRegExp :
                 doubleQuoteEscapedCharsRegExp;
         return s.replace(escapedCharsRegExp, getReplacement);
     }
     ts.escapeString = escapeString;
     function getReplacement(c, offset, input) {
-        if (c.charCodeAt(0) === 0 /* nullCharacter */) {
+        if (c.charCodeAt(0) === 0) {
             var lookAhead = input.charCodeAt(offset + c.length);
-            if (lookAhead >= 48 /* _0 */ && lookAhead <= 57 /* _9 */) {
-                // If the null character is followed by digits, print as a hex escape to prevent the result from parsing as an octal (which is forbidden in strict mode)
+            if (lookAhead >= 48 && lookAhead <= 57) {
                 return "\\x00";
             }
-            // Otherwise, keep printing a literal \0 for the null character
             return "\\0";
         }
         return escapedCharsMap.get(c) || get16BitUnicodeEscapeSequence(c.charCodeAt(0));
     }
     function isIntrinsicJsxName(name) {
         var ch = name.charCodeAt(0);
-        return (ch >= 97 /* a */ && ch <= 122 /* z */) || name.indexOf("-") > -1;
+        return (ch >= 97 && ch <= 122) || name.indexOf("-") > -1;
     }
     ts.isIntrinsicJsxName = isIntrinsicJsxName;
     function get16BitUnicodeEscapeSequence(charCode) {
@@ -10247,8 +7913,6 @@ var ts;
     var nonAsciiCharacters = /[^\u0000-\u007F]/g;
     function escapeNonAsciiString(s, quoteChar) {
         s = escapeString(s, quoteChar);
-        // Replace non-ASCII characters with '\uNNNN' escapes if any exist.
-        // Otherwise just return the original string.
         return nonAsciiCharacters.test(s) ?
             s.replace(nonAsciiCharacters, function (c) { return get16BitUnicodeEscapeSequence(c.charCodeAt(0)); }) :
             s;
@@ -10367,14 +8031,11 @@ var ts;
         return getResolvedExternalModuleName(host, file);
     }
     ts.getExternalModuleNameFromDeclaration = getExternalModuleNameFromDeclaration;
-    /**
-     * Resolves a local path to a path which is absolute to the base of the emit
-     */
     function getExternalModuleNameFromPath(host, fileName, referencePath) {
         var getCanonicalFileName = function (f) { return host.getCanonicalFileName(f); };
-        var dir = ts.toPath(referencePath ? ts.getDirectoryPath(referencePath) : host.getCommonSourceDirectory(), host.getCurrentDirectory(), getCanonicalFileName);
+        var dir = toPath(referencePath ? ts.getDirectoryPath(referencePath) : host.getCommonSourceDirectory(), host.getCurrentDirectory(), getCanonicalFileName);
         var filePath = ts.getNormalizedAbsolutePath(fileName, host.getCurrentDirectory());
-        var relativePath = ts.getRelativePathToDirectoryOrUrl(dir, filePath, dir, getCanonicalFileName, /*isAbsolutePathAnUrl*/ false);
+        var relativePath = ts.getRelativePathToDirectoryOrUrl(dir, filePath, dir, getCanonicalFileName, false);
         var extensionless = ts.removeFileExtension(relativePath);
         return referencePath ? ts.ensurePathIsNonModuleName(extensionless) : extensionless;
     }
@@ -10393,29 +8054,19 @@ var ts;
     ts.getOwnEmitOutputFilePath = getOwnEmitOutputFilePath;
     function getDeclarationEmitOutputFilePath(sourceFile, host) {
         var options = host.getCompilerOptions();
-        var outputDir = options.declarationDir || options.outDir; // Prefer declaration folder if specified
+        var outputDir = options.declarationDir || options.outDir;
         var path = outputDir
             ? getSourceFilePathInNewDir(sourceFile, host, outputDir)
             : sourceFile.fileName;
-        return ts.removeFileExtension(path) + ".d.ts" /* Dts */;
+        return ts.removeFileExtension(path) + ".d.ts";
     }
     ts.getDeclarationEmitOutputFilePath = getDeclarationEmitOutputFilePath;
-    /**
-     * Gets the source files that are expected to have an emit output.
-     *
-     * Originally part of `forEachExpectedEmitFile`, this functionality was extracted to support
-     * transformations.
-     *
-     * @param host An EmitHost.
-     * @param targetSourceFile An optional target source file to emit.
-     */
     function getSourceFilesToEmit(host, targetSourceFile) {
         var options = host.getCompilerOptions();
         var isSourceFileFromExternalLibrary = function (file) { return host.isSourceFileFromExternalLibrary(file); };
         if (options.outFile || options.out) {
             var moduleKind = ts.getEmitModuleKind(options);
             var moduleEmitEnabled_1 = moduleKind === ts.ModuleKind.AMD || moduleKind === ts.ModuleKind.System;
-            // Can emit only sources that are not declaration file and are either non module code or module with --module or --target es6 specified
             return ts.filter(host.getSourceFiles(), function (sourceFile) {
                 return (moduleEmitEnabled_1 || !ts.isExternalModule(sourceFile)) && sourceFileMayBeEmitted(sourceFile, options, isSourceFileFromExternalLibrary);
             });
@@ -10426,7 +8077,6 @@ var ts;
         }
     }
     ts.getSourceFilesToEmit = getSourceFilesToEmit;
-    /** Don't call this for `--outFile`, just for `--outDir` or plain emit. `--outFile` needs additional checks. */
     function sourceFileMayBeEmitted(sourceFile, options, isSourceFileFromExternalLibrary) {
         return !(options.noEmitForJsFiles && isSourceFileJavaScript(sourceFile)) && !sourceFile.isDeclarationFile && !isSourceFileFromExternalLibrary(sourceFile);
     }
@@ -10463,14 +8113,12 @@ var ts;
             return accessor.parameters[hasThis ? 1 : 0];
         }
     }
-    /** Get the type annotation for the value parameter. */
     function getSetAccessorTypeAnnotationNode(accessor) {
         var parameter = getSetAccessorValueParameter(accessor);
         return parameter && parameter.type;
     }
     ts.getSetAccessorTypeAnnotationNode = getSetAccessorTypeAnnotationNode;
     function getThisParameter(signature) {
-        // callback tags do not currently support this parameters
         if (signature.parameters.length && !ts.isJSDocSignature(signature)) {
             var thisParameter = signature.parameters[0];
             if (parameterIsThisKeyword(thisParameter)) {
@@ -10484,25 +8132,24 @@ var ts;
     }
     ts.parameterIsThisKeyword = parameterIsThisKeyword;
     function isThisIdentifier(node) {
-        return !!node && node.kind === 71 /* Identifier */ && identifierIsThisKeyword(node);
+        return !!node && node.kind === 71 && identifierIsThisKeyword(node);
     }
     ts.isThisIdentifier = isThisIdentifier;
     function identifierIsThisKeyword(id) {
-        return id.originalKeywordKind === 99 /* ThisKeyword */;
+        return id.originalKeywordKind === 99;
     }
     ts.identifierIsThisKeyword = identifierIsThisKeyword;
     function getAllAccessorDeclarations(declarations, accessor) {
-        // TODO: GH#18217
         var firstAccessor;
         var secondAccessor;
         var getAccessor;
         var setAccessor;
         if (hasDynamicName(accessor)) {
             firstAccessor = accessor;
-            if (accessor.kind === 156 /* GetAccessor */) {
+            if (accessor.kind === 156) {
                 getAccessor = accessor;
             }
-            else if (accessor.kind === 157 /* SetAccessor */) {
+            else if (accessor.kind === 157) {
                 setAccessor = accessor;
             }
             else {
@@ -10511,8 +8158,8 @@ var ts;
         }
         else {
             ts.forEach(declarations, function (member) {
-                if ((member.kind === 156 /* GetAccessor */ || member.kind === 157 /* SetAccessor */)
-                    && hasModifier(member, 32 /* Static */) === hasModifier(accessor, 32 /* Static */)) {
+                if ((member.kind === 156 || member.kind === 157)
+                    && hasModifier(member, 32) === hasModifier(accessor, 32)) {
                     var memberName = getPropertyNameForPropertyNameNode(member.name);
                     var accessorName = getPropertyNameForPropertyNameNode(accessor.name);
                     if (memberName === accessorName) {
@@ -10522,10 +8169,10 @@ var ts;
                         else if (!secondAccessor) {
                             secondAccessor = member;
                         }
-                        if (member.kind === 156 /* GetAccessor */ && !getAccessor) {
+                        if (member.kind === 156 && !getAccessor) {
                             getAccessor = member;
                         }
-                        if (member.kind === 157 /* SetAccessor */ && !setAccessor) {
+                        if (member.kind === 157 && !setAccessor) {
                             setAccessor = member;
                         }
                     }
@@ -10540,10 +8187,6 @@ var ts;
         };
     }
     ts.getAllAccessorDeclarations = getAllAccessorDeclarations;
-    /**
-     * Gets the effective type annotation of a variable, parameter, or property. If the node was
-     * parsed in a JavaScript file, gets the type annotation from JSDoc.
-     */
     function getEffectiveTypeAnnotationNode(node) {
         return node.type || (isInJavaScriptFile(node) ? ts.getJSDocType(node) : undefined);
     }
@@ -10552,10 +8195,6 @@ var ts;
         return node.type;
     }
     ts.getTypeAnnotationNode = getTypeAnnotationNode;
-    /**
-     * Gets the effective return type annotation of a signature. If the node was parsed in a
-     * JavaScript file, gets the return type annotation from JSDoc.
-     */
     function getEffectiveReturnTypeNode(node) {
         if (ts.isJSDocSignature(node)) {
             return node.type && node.type.typeExpression && node.type.typeExpression.type;
@@ -10563,16 +8202,12 @@ var ts;
         return node.type || (isInJavaScriptFile(node) ? ts.getJSDocReturnType(node) : undefined);
     }
     ts.getEffectiveReturnTypeNode = getEffectiveReturnTypeNode;
-    /**
-     * Gets the effective type parameters. If the node was parsed in a
-     * JavaScript file, gets the type parameters from the `@template` tag from JSDoc.
-     */
     function getEffectiveTypeParameterDeclarations(node) {
         if (ts.isJSDocSignature(node)) {
             return ts.emptyArray;
         }
         if (isJSDocTypeAlias(node)) {
-            ts.Debug.assert(node.parent.kind === 286 /* JSDocComment */);
+            ts.Debug.assert(node.parent.kind === 286);
             return ts.flatMap(node.parent.tags, function (tag) { return ts.isJSDocTemplateTag(tag) ? tag.typeParameters : undefined; });
         }
         return node.typeParameters || (isInJavaScriptFile(node) ? getJSDocTypeParameterDeclarations(node) : ts.emptyArray);
@@ -10582,14 +8217,9 @@ var ts;
         return ts.flatMap(ts.getJSDocTags(node), function (tag) { return isNonTypeAliasTemplate(tag) ? tag.typeParameters : undefined; });
     }
     ts.getJSDocTypeParameterDeclarations = getJSDocTypeParameterDeclarations;
-    /** template tags are only available when a typedef isn't already using them */
     function isNonTypeAliasTemplate(tag) {
-        return ts.isJSDocTemplateTag(tag) && !(tag.parent.kind === 286 /* JSDocComment */ && tag.parent.tags.some(isJSDocTypeAlias));
+        return ts.isJSDocTemplateTag(tag) && !(tag.parent.kind === 286 && tag.parent.tags.some(isJSDocTypeAlias));
     }
-    /**
-     * Gets the effective type annotation of the value parameter of a set accessor. If the node
-     * was parsed in a JavaScript file, gets the type annotation from JSDoc.
-     */
     function getEffectiveSetAccessorTypeAnnotationNode(node) {
         var parameter = getSetAccessorValueParameter(node);
         return parameter && getEffectiveTypeAnnotationNode(parameter);
@@ -10600,7 +8230,6 @@ var ts;
     }
     ts.emitNewLineBeforeLeadingComments = emitNewLineBeforeLeadingComments;
     function emitNewLineBeforeLeadingCommentsOfPosition(lineMap, writer, pos, leadingComments) {
-        // If the leading comments start on different line than the start of node, write new line
         if (leadingComments && leadingComments.length && pos !== leadingComments[0].pos &&
             getLineOfLocalPositionFromLineMap(lineMap, pos) !== getLineOfLocalPositionFromLineMap(lineMap, leadingComments[0].pos)) {
             writer.writeLine();
@@ -10608,7 +8237,6 @@ var ts;
     }
     ts.emitNewLineBeforeLeadingCommentsOfPosition = emitNewLineBeforeLeadingCommentsOfPosition;
     function emitNewLineBeforeLeadingCommentOfPosition(lineMap, writer, pos, commentPos) {
-        // If the leading comments start on different line than the start of node, write new line
         if (pos !== commentPos &&
             getLineOfLocalPositionFromLineMap(lineMap, pos) !== getLineOfLocalPositionFromLineMap(lineMap, commentPos)) {
             writer.writeLine();
@@ -10641,25 +8269,15 @@ var ts;
         }
     }
     ts.emitComments = emitComments;
-    /**
-     * Detached comment is a comment at the top of file or function body that is separated from
-     * the next statement by space.
-     */
     function emitDetachedComments(text, lineMap, writer, writeComment, node, newLine, removeComments) {
         var leadingComments;
         var currentDetachedCommentInfo;
         if (removeComments) {
-            // removeComments is true, only reserve pinned comment at the top of file
-            // For example:
-            //      /*! Pinned Comment */
-            //
-            //      var x = 10;
             if (node.pos === 0) {
                 leadingComments = ts.filter(ts.getLeadingCommentRanges(text, node.pos), isPinnedCommentLocal);
             }
         }
         else {
-            // removeComments is false, just get detached as normal and bypass the process to filter comment
             leadingComments = ts.getLeadingCommentRanges(text, node.pos);
         }
         if (leadingComments) {
@@ -10671,9 +8289,6 @@ var ts;
                     var lastCommentLine = getLineOfLocalPositionFromLineMap(lineMap, lastComment.end);
                     var commentLine = getLineOfLocalPositionFromLineMap(lineMap, comment.pos);
                     if (commentLine >= lastCommentLine + 2) {
-                        // There was a blank line between the last comment and this comment.  This
-                        // comment is not part of the copyright comments.  Return what we have so
-                        // far.
                         break;
                     }
                 }
@@ -10681,15 +8296,11 @@ var ts;
                 lastComment = comment;
             }
             if (detachedComments.length) {
-                // All comments look like they could have been part of the copyright header.  Make
-                // sure there is at least one blank line between it and the node.  If not, it's not
-                // a copyright header.
                 var lastCommentLine = getLineOfLocalPositionFromLineMap(lineMap, ts.last(detachedComments).end);
                 var nodeLine = getLineOfLocalPositionFromLineMap(lineMap, ts.skipTrivia(text, node.pos));
                 if (nodeLine >= lastCommentLine + 2) {
-                    // Valid detachedComments
                     emitNewLineBeforeLeadingComments(lineMap, writer, node, leadingComments);
-                    emitComments(text, lineMap, writer, detachedComments, /*leadingSeparator*/ false, /*trailingSeparator*/ true, newLine, writeComment);
+                    emitComments(text, lineMap, writer, detachedComments, false, true, newLine, writeComment);
                     currentDetachedCommentInfo = { nodePos: node.pos, detachedCommentEndPos: ts.last(detachedComments).end };
                 }
             }
@@ -10701,7 +8312,7 @@ var ts;
     }
     ts.emitDetachedComments = emitDetachedComments;
     function writeCommentRange(text, lineMap, writer, commentPos, commentEnd, newLine) {
-        if (text.charCodeAt(commentPos + 1) === 42 /* asterisk */) {
+        if (text.charCodeAt(commentPos + 1) === 42) {
             var firstCommentLineAndCharacter = ts.computeLineAndCharacterOfPosition(lineMap, commentPos);
             var lineCount = lineMap.length;
             var firstCommentLineIndent = void 0;
@@ -10710,50 +8321,29 @@ var ts;
                     ? text.length + 1
                     : lineMap[currentLine + 1];
                 if (pos !== commentPos) {
-                    // If we are not emitting first line, we need to write the spaces to adjust the alignment
                     if (firstCommentLineIndent === undefined) {
                         firstCommentLineIndent = calculateIndent(text, lineMap[firstCommentLineAndCharacter.line], commentPos);
                     }
-                    // These are number of spaces writer is going to write at current indent
                     var currentWriterIndentSpacing = writer.getIndent() * getIndentSize();
-                    // Number of spaces we want to be writing
-                    // eg: Assume writer indent
-                    // module m {
-                    //         /* starts at character 9 this is line 1
-                    //    * starts at character pos 4 line                        --1  = 8 - 8 + 3
-                    //   More left indented comment */                            --2  = 8 - 8 + 2
-                    //     class c { }
-                    // }
-                    // module m {
-                    //     /* this is line 1 -- Assume current writer indent 8
-                    //      * line                                                --3 = 8 - 4 + 5
-                    //            More right indented comment */                  --4 = 8 - 4 + 11
-                    //     class c { }
-                    // }
                     var spacesToEmit = currentWriterIndentSpacing - firstCommentLineIndent + calculateIndent(text, pos, nextLineStart);
                     if (spacesToEmit > 0) {
                         var numberOfSingleSpacesToEmit = spacesToEmit % getIndentSize();
                         var indentSizeSpaceString = getIndentString((spacesToEmit - numberOfSingleSpacesToEmit) / getIndentSize());
-                        // Write indent size string ( in eg 1: = "", 2: "" , 3: string with 8 spaces 4: string with 12 spaces
                         writer.rawWrite(indentSizeSpaceString);
-                        // Emit the single spaces (in eg: 1: 3 spaces, 2: 2 spaces, 3: 1 space, 4: 3 spaces)
                         while (numberOfSingleSpacesToEmit) {
                             writer.rawWrite(" ");
                             numberOfSingleSpacesToEmit--;
                         }
                     }
                     else {
-                        // No spaces to emit write empty string
                         writer.rawWrite("");
                     }
                 }
-                // Write the comment line text
                 writeTrimmedCurrentLine(text, commentEnd, writer, newLine, pos, nextLineStart);
                 pos = nextLineStart;
             }
         }
         else {
-            // Single line comment of style //....
             writer.write(text.substring(commentPos, commentEnd));
         }
     }
@@ -10762,33 +8352,29 @@ var ts;
         var end = Math.min(commentEnd, nextLineStart - 1);
         var currentLineText = text.substring(pos, end).replace(/^\s+|\s+$/g, "");
         if (currentLineText) {
-            // trimmed forward and ending spaces text
             writer.write(currentLineText);
             if (end !== commentEnd) {
                 writer.writeLine();
             }
         }
         else {
-            // Empty string - make sure we write empty line
             writer.writeLiteral(newLine);
         }
     }
     function calculateIndent(text, pos, end) {
         var currentLineIndent = 0;
         for (; pos < end && ts.isWhiteSpaceSingleLine(text.charCodeAt(pos)); pos++) {
-            if (text.charCodeAt(pos) === 9 /* tab */) {
-                // Tabs = TabSize = indent size and go to next tabStop
+            if (text.charCodeAt(pos) === 9) {
                 currentLineIndent += getIndentSize() - (currentLineIndent % getIndentSize());
             }
             else {
-                // Single space
                 currentLineIndent++;
             }
         }
         return currentLineIndent;
     }
     function hasModifiers(node) {
-        return getModifierFlags(node) !== 0 /* None */;
+        return getModifierFlags(node) !== 0;
     }
     ts.hasModifiers = hasModifiers;
     function hasModifier(node, flags) {
@@ -10796,11 +8382,11 @@ var ts;
     }
     ts.hasModifier = hasModifier;
     function hasStaticModifier(node) {
-        return hasModifier(node, 32 /* Static */);
+        return hasModifier(node, 32);
     }
     ts.hasStaticModifier = hasStaticModifier;
     function hasReadonlyModifier(node) {
-        return hasModifier(node, 64 /* Readonly */);
+        return hasModifier(node, 64);
     }
     ts.hasReadonlyModifier = hasReadonlyModifier;
     function getSelectedModifierFlags(node, flags) {
@@ -10808,59 +8394,58 @@ var ts;
     }
     ts.getSelectedModifierFlags = getSelectedModifierFlags;
     function getModifierFlags(node) {
-        if (node.modifierFlagsCache & 536870912 /* HasComputedFlags */) {
-            return node.modifierFlagsCache & ~536870912 /* HasComputedFlags */;
+        if (node.modifierFlagsCache & 536870912) {
+            return node.modifierFlagsCache & ~536870912;
         }
         var flags = getModifierFlagsNoCache(node);
-        node.modifierFlagsCache = flags | 536870912 /* HasComputedFlags */;
+        node.modifierFlagsCache = flags | 536870912;
         return flags;
     }
     ts.getModifierFlags = getModifierFlags;
     function getModifierFlagsNoCache(node) {
-        var flags = 0 /* None */;
+        var flags = 0;
         if (node.modifiers) {
             for (var _i = 0, _a = node.modifiers; _i < _a.length; _i++) {
                 var modifier = _a[_i];
                 flags |= modifierToFlag(modifier.kind);
             }
         }
-        if (node.flags & 4 /* NestedNamespace */ || (node.kind === 71 /* Identifier */ && node.isInJSDocNamespace)) {
-            flags |= 1 /* Export */;
+        if (node.flags & 4 || (node.kind === 71 && node.isInJSDocNamespace)) {
+            flags |= 1;
         }
         return flags;
     }
     ts.getModifierFlagsNoCache = getModifierFlagsNoCache;
     function modifierToFlag(token) {
         switch (token) {
-            case 115 /* StaticKeyword */: return 32 /* Static */;
-            case 114 /* PublicKeyword */: return 4 /* Public */;
-            case 113 /* ProtectedKeyword */: return 16 /* Protected */;
-            case 112 /* PrivateKeyword */: return 8 /* Private */;
-            case 117 /* AbstractKeyword */: return 128 /* Abstract */;
-            case 84 /* ExportKeyword */: return 1 /* Export */;
-            case 124 /* DeclareKeyword */: return 2 /* Ambient */;
-            case 76 /* ConstKeyword */: return 2048 /* Const */;
-            case 79 /* DefaultKeyword */: return 512 /* Default */;
-            case 120 /* AsyncKeyword */: return 256 /* Async */;
-            case 132 /* ReadonlyKeyword */: return 64 /* Readonly */;
-        }
-        return 0 /* None */;
+            case 115: return 32;
+            case 114: return 4;
+            case 113: return 16;
+            case 112: return 8;
+            case 117: return 128;
+            case 84: return 1;
+            case 124: return 2;
+            case 76: return 2048;
+            case 79: return 512;
+            case 120: return 256;
+            case 132: return 64;
+        }
+        return 0;
     }
     ts.modifierToFlag = modifierToFlag;
     function isLogicalOperator(token) {
-        return token === 54 /* BarBarToken */
-            || token === 53 /* AmpersandAmpersandToken */
-            || token === 51 /* ExclamationToken */;
+        return token === 54
+            || token === 53
+            || token === 51;
     }
     ts.isLogicalOperator = isLogicalOperator;
     function isAssignmentOperator(token) {
-        return token >= 58 /* FirstAssignment */ && token <= 70 /* LastAssignment */;
+        return token >= 58 && token <= 70;
     }
     ts.isAssignmentOperator = isAssignmentOperator;
-    /** Get `C` given `N` if `N` is in the position `class C extends N` where `N` is an ExpressionWithTypeArguments. */
     function tryGetClassExtendingExpressionWithTypeArguments(node) {
         if (ts.isExpressionWithTypeArguments(node) &&
-            node.parent.token === 85 /* ExtendsKeyword */ &&
+            node.parent.token === 85 &&
             ts.isClassLike(node.parent.parent)) {
             return node.parent.parent;
         }
@@ -10869,16 +8454,16 @@ var ts;
     function isAssignmentExpression(node, excludeCompoundAssignment) {
         return ts.isBinaryExpression(node)
             && (excludeCompoundAssignment
-                ? node.operatorToken.kind === 58 /* EqualsToken */
+                ? node.operatorToken.kind === 58
                 : isAssignmentOperator(node.operatorToken.kind))
             && ts.isLeftHandSideExpression(node.left);
     }
     ts.isAssignmentExpression = isAssignmentExpression;
     function isDestructuringAssignment(node) {
-        if (isAssignmentExpression(node, /*excludeCompoundAssignment*/ true)) {
+        if (isAssignmentExpression(node, true)) {
             var kind = node.left.kind;
-            return kind === 184 /* ObjectLiteralExpression */
-                || kind === 183 /* ArrayLiteralExpression */;
+            return kind === 184
+                || kind === 183;
         }
         return false;
     }
@@ -10888,16 +8473,16 @@ var ts;
     }
     ts.isExpressionWithTypeArgumentsInClassExtendsClause = isExpressionWithTypeArgumentsInClassExtendsClause;
     function isExpressionWithTypeArgumentsInClassImplementsClause(node) {
-        return node.kind === 207 /* ExpressionWithTypeArguments */
+        return node.kind === 207
             && isEntityNameExpression(node.expression)
             && node.parent
-            && node.parent.token === 108 /* ImplementsKeyword */
+            && node.parent.token === 108
             && node.parent.parent
             && ts.isClassLike(node.parent.parent);
     }
     ts.isExpressionWithTypeArgumentsInClassImplementsClause = isExpressionWithTypeArgumentsInClassImplementsClause;
     function isEntityNameExpression(node) {
-        return node.kind === 71 /* Identifier */ || isPropertyAccessEntityNameExpression(node);
+        return node.kind === 71 || isPropertyAccessEntityNameExpression(node);
     }
     ts.isEntityNameExpression = isEntityNameExpression;
     function isPropertyAccessEntityNameExpression(node) {
@@ -10909,17 +8494,17 @@ var ts;
     }
     ts.isPrototypeAccess = isPrototypeAccess;
     function isRightSideOfQualifiedNameOrPropertyAccess(node) {
-        return (node.parent.kind === 146 /* QualifiedName */ && node.parent.right === node) ||
-            (node.parent.kind === 185 /* PropertyAccessExpression */ && node.parent.name === node);
+        return (node.parent.kind === 146 && node.parent.right === node) ||
+            (node.parent.kind === 185 && node.parent.name === node);
     }
     ts.isRightSideOfQualifiedNameOrPropertyAccess = isRightSideOfQualifiedNameOrPropertyAccess;
     function isEmptyObjectLiteral(expression) {
-        return expression.kind === 184 /* ObjectLiteralExpression */ &&
+        return expression.kind === 184 &&
             expression.properties.length === 0;
     }
     ts.isEmptyObjectLiteral = isEmptyObjectLiteral;
     function isEmptyArrayLiteral(expression) {
-        return expression.kind === 183 /* ArrayLiteralExpression */ &&
+        return expression.kind === 183 &&
             expression.elements.length === 0;
     }
     ts.isEmptyArrayLiteral = isEmptyArrayLiteral;
@@ -10928,23 +8513,17 @@ var ts;
     }
     ts.getLocalSymbolForExportDefault = getLocalSymbolForExportDefault;
     function isExportDefaultSymbol(symbol) {
-        return symbol && ts.length(symbol.declarations) > 0 && hasModifier(symbol.declarations[0], 512 /* Default */);
+        return symbol && ts.length(symbol.declarations) > 0 && hasModifier(symbol.declarations[0], 512);
     }
-    /** Return ".ts", ".d.ts", or ".tsx", if that is the extension. */
     function tryExtractTypeScriptExtension(fileName) {
         return ts.find(ts.supportedTypescriptExtensionsForExtractExtension, function (extension) { return ts.fileExtensionIs(fileName, extension); });
     }
     ts.tryExtractTypeScriptExtension = tryExtractTypeScriptExtension;
-    /**
-     * Replace each instance of non-ascii characters by one, two, three, or four escape sequences
-     * representing the UTF-8 encoding of the character, and return the expanded char code list.
-     */
     function getExpandedCharCodes(input) {
         var output = [];
         var length = input.length;
         for (var i = 0; i < length; i++) {
             var charCode = input.charCodeAt(i);
-            // handle utf8
             if (charCode < 0x80) {
                 output.push(charCode);
             }
@@ -10970,9 +8549,6 @@ var ts;
         return output;
     }
     var base64Digits = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
-    /**
-     * Converts a string to a base-64 encoded ASCII string.
-     */
     function convertToBase64(input) {
         var result = "";
         var charCodes = getExpandedCharCodes(input);
@@ -10980,21 +8556,16 @@ var ts;
         var length = charCodes.length;
         var byte1, byte2, byte3, byte4;
         while (i < length) {
-            // Convert every 6-bits in the input 3 character points
-            // into a base64 digit
             byte1 = charCodes[i] >> 2;
             byte2 = (charCodes[i] & 3) << 4 | charCodes[i + 1] >> 4;
             byte3 = (charCodes[i + 1] & 15) << 2 | charCodes[i + 2] >> 6;
             byte4 = charCodes[i + 2] & 63;
-            // We are out of characters in the input, set the extra
-            // digits to 64 (padding character).
             if (i + 1 >= length) {
                 byte3 = byte4 = 64;
             }
             else if (i + 2 >= length) {
                 byte4 = 64;
             }
-            // Write to the output
             result += base64Digits.charAt(byte1) + base64Digits.charAt(byte2) + base64Digits.charAt(byte3) + base64Digits.charAt(byte4);
             i += 3;
         }
@@ -11020,12 +8591,9 @@ var ts;
                     i++;
                     nextCode = codes[i];
                 }
-                // `value` may be greater than 10FFFF (the maximum unicode codepoint) - JS will just make this into an invalid character for us
                 output += String.fromCharCode(value);
             }
             else {
-                // We don't want to kill the process when decoding fails (due to a following char byte not
-                // following a leading char), so we just print the (bad) value
                 output += String.fromCharCode(charCode);
                 i++;
             }
@@ -11047,11 +8615,9 @@ var ts;
         var expandedCharCodes = [];
         var i = 0;
         while (i < length) {
-            // Stop decoding once padding characters are present
             if (input.charCodeAt(i) === base64Digits.charCodeAt(64)) {
                 break;
             }
-            // convert 4 input digits into three characters, ignoring padding characters at the end
             var ch1 = base64Digits.indexOf(input[i]);
             var ch2 = base64Digits.indexOf(input[i + 1]);
             var ch3 = base64Digits.indexOf(input[i + 2]);
@@ -11059,10 +8625,10 @@ var ts;
             var code1 = ((ch1 & 63) << 2) | ((ch2 >> 4) & 3);
             var code2 = ((ch2 & 15) << 4) | ((ch3 >> 2) & 15);
             var code3 = ((ch3 & 3) << 6) | (ch4 & 63);
-            if (code2 === 0 && ch3 !== 0) { // code2 decoded to zero, but ch3 was padding - elide code2 and code3
+            if (code2 === 0 && ch3 !== 0) {
                 expandedCharCodes.push(code1);
             }
-            else if (code3 === 0 && ch4 !== 0) { // code3 decoded to zero, but ch4 was padding, elide code3
+            else if (code3 === 0 && ch4 !== 0) {
                 expandedCharCodes.push(code1, code2);
             }
             else {
@@ -11077,17 +8643,14 @@ var ts;
     var lineFeed = "\n";
     function getNewLineCharacter(options, getNewLine) {
         switch (options.newLine) {
-            case 0 /* CarriageReturnLineFeed */:
+            case 0:
                 return carriageReturnLineFeed;
-            case 1 /* LineFeed */:
+            case 1:
                 return lineFeed;
         }
         return getNewLine ? getNewLine() : ts.sys ? ts.sys.newLine : carriageReturnLineFeed;
     }
     ts.getNewLineCharacter = getNewLineCharacter;
-    /**
-     * Formats an enum value as a string for debugging and debug assertions.
-     */
     function formatEnum(value, enumObject, isFlags) {
         if (value === void 0) { value = 0; }
         var members = getEnumMembers(enumObject);
@@ -11129,96 +8692,61 @@ var ts;
         return ts.stableSort(result, function (x, y) { return ts.compareValues(x[0], y[0]); });
     }
     function formatSyntaxKind(kind) {
-        return formatEnum(kind, ts.SyntaxKind, /*isFlags*/ false);
+        return formatEnum(kind, ts.SyntaxKind, false);
     }
     ts.formatSyntaxKind = formatSyntaxKind;
     function formatModifierFlags(flags) {
-        return formatEnum(flags, ts.ModifierFlags, /*isFlags*/ true);
+        return formatEnum(flags, ts.ModifierFlags, true);
     }
     ts.formatModifierFlags = formatModifierFlags;
     function formatTransformFlags(flags) {
-        return formatEnum(flags, ts.TransformFlags, /*isFlags*/ true);
+        return formatEnum(flags, ts.TransformFlags, true);
     }
     ts.formatTransformFlags = formatTransformFlags;
     function formatEmitFlags(flags) {
-        return formatEnum(flags, ts.EmitFlags, /*isFlags*/ true);
+        return formatEnum(flags, ts.EmitFlags, true);
     }
     ts.formatEmitFlags = formatEmitFlags;
     function formatSymbolFlags(flags) {
-        return formatEnum(flags, ts.SymbolFlags, /*isFlags*/ true);
+        return formatEnum(flags, ts.SymbolFlags, true);
     }
     ts.formatSymbolFlags = formatSymbolFlags;
     function formatTypeFlags(flags) {
-        return formatEnum(flags, ts.TypeFlags, /*isFlags*/ true);
+        return formatEnum(flags, ts.TypeFlags, true);
     }
     ts.formatTypeFlags = formatTypeFlags;
     function formatObjectFlags(flags) {
-        return formatEnum(flags, ts.ObjectFlags, /*isFlags*/ true);
+        return formatEnum(flags, ts.ObjectFlags, true);
     }
     ts.formatObjectFlags = formatObjectFlags;
-    /**
-     * Creates a new TextRange from the provided pos and end.
-     *
-     * @param pos The start position.
-     * @param end The end position.
-     */
     function createRange(pos, end) {
         return { pos: pos, end: end };
     }
     ts.createRange = createRange;
-    /**
-     * Creates a new TextRange from a provided range with a new end position.
-     *
-     * @param range A TextRange.
-     * @param end The new end position.
-     */
     function moveRangeEnd(range, end) {
         return createRange(range.pos, end);
     }
     ts.moveRangeEnd = moveRangeEnd;
-    /**
-     * Creates a new TextRange from a provided range with a new start position.
-     *
-     * @param range A TextRange.
-     * @param pos The new Start position.
-     */
     function moveRangePos(range, pos) {
         return createRange(pos, range.end);
     }
     ts.moveRangePos = moveRangePos;
-    /**
-     * Moves the start position of a range past any decorators.
-     */
     function moveRangePastDecorators(node) {
         return node.decorators && node.decorators.length > 0
             ? moveRangePos(node, node.decorators.end)
             : node;
     }
     ts.moveRangePastDecorators = moveRangePastDecorators;
-    /**
-     * Moves the start position of a range past any decorators or modifiers.
-     */
     function moveRangePastModifiers(node) {
         return node.modifiers && node.modifiers.length > 0
             ? moveRangePos(node, node.modifiers.end)
             : moveRangePastDecorators(node);
     }
     ts.moveRangePastModifiers = moveRangePastModifiers;
-    /**
-     * Determines whether a TextRange has the same start and end positions.
-     *
-     * @param range A TextRange.
-     */
     function isCollapsedRange(range) {
         return range.pos === range.end;
     }
     ts.isCollapsedRange = isCollapsedRange;
-    /**
-     * Creates a new TextRange for a token at the provides start position.
-     *
-     * @param pos The start position.
-     * @param token The token.
-     */
     function createTokenRange(pos, token) {
         return createRange(pos, pos + ts.tokenToString(token).length);
     }
@@ -11252,16 +8780,12 @@ var ts;
         return ts.positionIsSynthesized(range.pos) ? -1 : ts.skipTrivia(sourceFile.text, range.pos);
     }
     ts.getStartPositionOfRange = getStartPositionOfRange;
-    /**
-     * Determines whether a name was originally the declaration name of an enum or namespace
-     * declaration.
-     */
     function isDeclarationNameOfEnumOrNamespace(node) {
         var parseNode = ts.getParseTreeNode(node);
         if (parseNode) {
             switch (parseNode.parent.kind) {
-                case 238 /* EnumDeclaration */:
-                case 239 /* ModuleDeclaration */:
+                case 238:
+                case 239:
                     return parseNode === parseNode.parent.name;
             }
         }
@@ -11276,79 +8800,71 @@ var ts;
         return node.initializer !== undefined;
     }
     function isWatchSet(options) {
-        // Firefox has Object.prototype.watch
         return options.watch && options.hasOwnProperty("watch");
     }
     ts.isWatchSet = isWatchSet;
+    function closeFileWatcher(watcher) {
+        watcher.close();
+    }
+    ts.closeFileWatcher = closeFileWatcher;
     function getCheckFlags(symbol) {
-        return symbol.flags & 33554432 /* Transient */ ? symbol.checkFlags : 0;
+        return symbol.flags & 33554432 ? symbol.checkFlags : 0;
     }
     ts.getCheckFlags = getCheckFlags;
     function getDeclarationModifierFlagsFromSymbol(s) {
         if (s.valueDeclaration) {
             var flags = ts.getCombinedModifierFlags(s.valueDeclaration);
-            return s.parent && s.parent.flags & 32 /* Class */ ? flags : flags & ~28 /* AccessibilityModifier */;
+            return s.parent && s.parent.flags & 32 ? flags : flags & ~28;
         }
-        if (getCheckFlags(s) & 6 /* Synthetic */) {
+        if (getCheckFlags(s) & 6) {
             var checkFlags = s.checkFlags;
-            var accessModifier = checkFlags & 256 /* ContainsPrivate */ ? 8 /* Private */ :
-                checkFlags & 64 /* ContainsPublic */ ? 4 /* Public */ :
-                    16 /* Protected */;
-            var staticModifier = checkFlags & 512 /* ContainsStatic */ ? 32 /* Static */ : 0;
+            var accessModifier = checkFlags & 256 ? 8 :
+                checkFlags & 64 ? 4 :
+                    16;
+            var staticModifier = checkFlags & 512 ? 32 : 0;
             return accessModifier | staticModifier;
         }
-        if (s.flags & 4194304 /* Prototype */) {
-            return 4 /* Public */ | 32 /* Static */;
+        if (s.flags & 4194304) {
+            return 4 | 32;
         }
         return 0;
     }
     ts.getDeclarationModifierFlagsFromSymbol = getDeclarationModifierFlagsFromSymbol;
     function skipAlias(symbol, checker) {
-        return symbol.flags & 2097152 /* Alias */ ? checker.getAliasedSymbol(symbol) : symbol;
+        return symbol.flags & 2097152 ? checker.getAliasedSymbol(symbol) : symbol;
     }
     ts.skipAlias = skipAlias;
-    /** See comment on `declareModuleMember` in `binder.ts`. */
     function getCombinedLocalAndExportSymbolFlags(symbol) {
         return symbol.exportSymbol ? symbol.exportSymbol.flags | symbol.flags : symbol.flags;
     }
     ts.getCombinedLocalAndExportSymbolFlags = getCombinedLocalAndExportSymbolFlags;
     function isWriteOnlyAccess(node) {
-        return accessKind(node) === 1 /* Write */;
+        return accessKind(node) === 1;
     }
     ts.isWriteOnlyAccess = isWriteOnlyAccess;
     function isWriteAccess(node) {
-        return accessKind(node) !== 0 /* Read */;
+        return accessKind(node) !== 0;
     }
     ts.isWriteAccess = isWriteAccess;
-    var AccessKind;
-    (function (AccessKind) {
-        /** Only reads from a variable. */
-        AccessKind[AccessKind["Read"] = 0] = "Read";
-        /** Only writes to a variable without using the result. E.g.: `x++;`. */
-        AccessKind[AccessKind["Write"] = 1] = "Write";
-        /** Writes to a variable and uses the result as an expression. E.g.: `f(x++);`. */
-        AccessKind[AccessKind["ReadWrite"] = 2] = "ReadWrite";
-    })(AccessKind || (AccessKind = {}));
     function accessKind(node) {
         var parent = node.parent;
         if (!parent)
-            return 0 /* Read */;
+            return 0;
         switch (parent.kind) {
-            case 199 /* PostfixUnaryExpression */:
-            case 198 /* PrefixUnaryExpression */:
+            case 199:
+            case 198:
                 var operator = parent.operator;
-                return operator === 43 /* PlusPlusToken */ || operator === 44 /* MinusMinusToken */ ? writeOrReadWrite() : 0 /* Read */;
-            case 200 /* BinaryExpression */:
+                return operator === 43 || operator === 44 ? writeOrReadWrite() : 0;
+            case 200:
                 var _a = parent, left = _a.left, operatorToken = _a.operatorToken;
-                return left === node && isAssignmentOperator(operatorToken.kind) ? writeOrReadWrite() : 0 /* Read */;
-            case 185 /* PropertyAccessExpression */:
-                return parent.name !== node ? 0 /* Read */ : accessKind(parent);
+                return left === node && isAssignmentOperator(operatorToken.kind) ? writeOrReadWrite() : 0;
+            case 185:
+                return parent.name !== node ? 0 : accessKind(parent);
             default:
-                return 0 /* Read */;
+                return 0;
         }
         function writeOrReadWrite() {
-            // If grandparent is not an ExpressionStatement, this is used as an expression in addition to having a side effect.
-            return parent.parent && parent.parent.kind === 216 /* ExpressionStatement */ ? 1 /* Write */ : 2 /* ReadWrite */;
+            return parent.parent && parent.parent.kind === 216 ? 1 : 2;
         }
     }
     function compareDataObjects(dst, src) {
@@ -11370,43 +8886,30 @@ var ts;
         return true;
     }
     ts.compareDataObjects = compareDataObjects;
-    /**
-     * clears already present map by calling onDeleteExistingValue callback before deleting that key/value
-     */
     function clearMap(map, onDeleteValue) {
-        // Remove all
         map.forEach(onDeleteValue);
         map.clear();
     }
     ts.clearMap = clearMap;
-    /**
-     * Mutates the map with newMap such that keys in map will be same as newMap.
-     */
     function mutateMap(map, newMap, options) {
         var createNewValue = options.createNewValue, onDeleteValue = options.onDeleteValue, onExistingValue = options.onExistingValue;
-        // Needs update
         map.forEach(function (existingValue, key) {
             var valueInNewMap = newMap.get(key);
-            // Not present any more in new map, remove it
             if (valueInNewMap === undefined) {
                 map.delete(key);
                 onDeleteValue(existingValue, key);
             }
-            // If present notify about existing values
             else if (onExistingValue) {
                 onExistingValue(existingValue, valueInNewMap, key);
             }
         });
-        // Add new values that are not already present
         newMap.forEach(function (valueInNewMap, key) {
             if (!map.has(key)) {
-                // New values
                 map.set(key, createNewValue(key, valueInNewMap));
             }
         });
     }
     ts.mutateMap = mutateMap;
-    /** Calls `callback` on `directory` and every ancestor directory it has, returning the first defined result. */
     function forEachAncestorDirectory(directory, callback) {
         while (true) {
             var result = callback(directory);
@@ -11421,15 +8924,14 @@ var ts;
         }
     }
     ts.forEachAncestorDirectory = forEachAncestorDirectory;
-    // Return true if the given type is the constructor type for an abstract class
     function isAbstractConstructorType(type) {
-        return !!(getObjectFlags(type) & 16 /* Anonymous */) && !!type.symbol && isAbstractConstructorSymbol(type.symbol);
+        return !!(getObjectFlags(type) & 16) && !!type.symbol && isAbstractConstructorSymbol(type.symbol);
     }
     ts.isAbstractConstructorType = isAbstractConstructorType;
     function isAbstractConstructorSymbol(symbol) {
-        if (symbol.flags & 32 /* Class */) {
+        if (symbol.flags & 32) {
             var declaration = getClassLikeDeclarationOfSymbol(symbol);
-            return !!declaration && hasModifier(declaration, 128 /* Abstract */);
+            return !!declaration && hasModifier(declaration, 128);
         }
         return false;
     }
@@ -11439,11 +8941,11 @@ var ts;
     }
     ts.getClassLikeDeclarationOfSymbol = getClassLikeDeclarationOfSymbol;
     function getObjectFlags(type) {
-        return type.flags & 131072 /* Object */ ? type.objectFlags : 0;
+        return type.flags & 131072 ? type.objectFlags : 0;
     }
     ts.getObjectFlags = getObjectFlags;
     function typeHasCallOrConstructSignatures(type, checker) {
-        return checker.getSignaturesOfType(type, 0 /* Call */).length !== 0 || checker.getSignaturesOfType(type, 1 /* Construct */).length !== 0;
+        return checker.getSignaturesOfType(type, 0).length !== 0 || checker.getSignaturesOfType(type, 1).length !== 0;
     }
     ts.typeHasCallOrConstructSignatures = typeHasCallOrConstructSignatures;
     function forSomeAncestorDirectory(directory, callback) {
@@ -11465,7 +8967,6 @@ var ts;
             if (nodeIsPresent(child))
                 lastChild = child;
         }, function (children) {
-            // As an optimization, jump straight to the end of the list.
             for (var i = children.length - 1; i >= 0; i--) {
                 if (nodeIsPresent(children[i])) {
                     lastChild = children[i];
@@ -11494,14 +8995,14 @@ var ts;
 (function (ts) {
     function getDefaultLibFileName(options) {
         switch (options.target) {
-            case 6 /* ESNext */:
+            case 6:
                 return "lib.esnext.full.d.ts";
-            case 4 /* ES2017 */:
+            case 4:
                 return "lib.es2017.full.d.ts";
-            case 3 /* ES2016 */:
+            case 3:
                 return "lib.es2016.full.d.ts";
-            case 2 /* ES2015 */:
-                return "lib.es6.d.ts"; // We don't use lib.es2015.full.d.ts due to breaking change.
+            case 2:
+                return "lib.es6.d.ts";
             default:
                 return "lib.d.ts";
         }
@@ -11519,7 +9020,6 @@ var ts;
         return position >= span.start && position < textSpanEnd(span);
     }
     ts.textSpanContainsPosition = textSpanContainsPosition;
-    // Returns true if 'span' contains 'other'.
     function textSpanContainsTextSpan(span, other) {
         return other.start >= span.start && textSpanEnd(other) <= textSpanEnd(span);
     }
@@ -11567,7 +9067,6 @@ var ts;
         return { start: start, length: length };
     }
     ts.createTextSpan = createTextSpan;
-    /* @internal */
     function createTextRange(pos, end) {
         if (end === void 0) { end = pos; }
         ts.Debug.assert(end >= pos);
@@ -11594,14 +9093,6 @@ var ts;
     }
     ts.createTextChangeRange = createTextChangeRange;
     ts.unchangedTextChangeRange = createTextChangeRange(createTextSpan(0, 0), 0);
-    /**
-     * Called to merge all the changes that occurred across several versions of a script snapshot
-     * into a single change.  i.e. if a user keeps making successive edits to a script we will
-     * have a text change from V1 to V2, V2 to V3, ..., Vn.
-     *
-     * This function will then merge those changes into a single change range valid between V1 and
-     * Vn.
-     */
     function collapseTextChangeRangesAcrossMultipleVersions(changes) {
         if (changes.length === 0) {
             return ts.unchangedTextChangeRange;
@@ -11609,93 +9100,12 @@ var ts;
         if (changes.length === 1) {
             return changes[0];
         }
-        // We change from talking about { { oldStart, oldLength }, newLength } to { oldStart, oldEnd, newEnd }
-        // as it makes things much easier to reason about.
         var change0 = changes[0];
         var oldStartN = change0.span.start;
         var oldEndN = textSpanEnd(change0.span);
         var newEndN = oldStartN + change0.newLength;
         for (var i = 1; i < changes.length; i++) {
             var nextChange = changes[i];
-            // Consider the following case:
-            // i.e. two edits.  The first represents the text change range { { 10, 50 }, 30 }.  i.e. The span starting
-            // at 10, with length 50 is reduced to length 30.  The second represents the text change range { { 30, 30 }, 40 }.
-            // i.e. the span starting at 30 with length 30 is increased to length 40.
-            //
-            //      0         10        20        30        40        50        60        70        80        90        100
-            //      -------------------------------------------------------------------------------------------------------
-            //                |                                                 /
-            //                |                                            /----
-            //  T1            |                                       /----
-            //                |                                  /----
-            //                |                             /----
-            //      -------------------------------------------------------------------------------------------------------
-            //                                     |                            \
-            //                                     |                               \
-            //   T2                                |                                 \
-            //                                     |                                   \
-            //                                     |                                      \
-            //      -------------------------------------------------------------------------------------------------------
-            //
-            // Merging these turns out to not be too difficult.  First, determining the new start of the change is trivial
-            // it's just the min of the old and new starts.  i.e.:
-            //
-            //      0         10        20        30        40        50        60        70        80        90        100
-            //      ------------------------------------------------------------*------------------------------------------
-            //                |                                                 /
-            //                |                                            /----
-            //  T1            |                                       /----
-            //                |                                  /----
-            //                |                             /----
-            //      ----------------------------------------$-------------------$------------------------------------------
-            //                .                    |                            \
-            //                .                    |                               \
-            //   T2           .                    |                                 \
-            //                .                    |                                   \
-            //                .                    |                                      \
-            //      ----------------------------------------------------------------------*--------------------------------
-            //
-            // (Note the dots represent the newly inferred start.
-            // Determining the new and old end is also pretty simple.  Basically it boils down to paying attention to the
-            // absolute positions at the asterisks, and the relative change between the dollar signs. Basically, we see
-            // which if the two $'s precedes the other, and we move that one forward until they line up.  in this case that
-            // means:
-            //
-            //      0         10        20        30        40        50        60        70        80        90        100
-            //      --------------------------------------------------------------------------------*----------------------
-            //                |                                                                     /
-            //                |                                                                /----
-            //  T1            |                                                           /----
-            //                |                                                      /----
-            //                |                                                 /----
-            //      ------------------------------------------------------------$------------------------------------------
-            //                .                    |                            \
-            //                .                    |                               \
-            //   T2           .                    |                                 \
-            //                .                    |                                   \
-            //                .                    |                                      \
-            //      ----------------------------------------------------------------------*--------------------------------
-            //
-            // In other words (in this case), we're recognizing that the second edit happened after where the first edit
-            // ended with a delta of 20 characters (60 - 40).  Thus, if we go back in time to where the first edit started
-            // that's the same as if we started at char 80 instead of 60.
-            //
-            // As it so happens, the same logic applies if the second edit precedes the first edit.  In that case rather
-            // than pushing the first edit forward to match the second, we'll push the second edit forward to match the
-            // first.
-            //
-            // In this case that means we have { oldStart: 10, oldEnd: 80, newEnd: 70 } or, in TextChangeRange
-            // semantics: { { start: 10, length: 70 }, newLength: 60 }
-            //
-            // The math then works out as follows.
-            // If we have { oldStart1, oldEnd1, newEnd1 } and { oldStart2, oldEnd2, newEnd2 } then we can compute the
-            // final result like so:
-            //
-            // {
-            //      oldStart3: Min(oldStart1, oldStart2),
-            //      oldEnd3: Max(oldEnd1, oldEnd1 + (oldEnd2 - newEnd1)),
-            //      newEnd3: Max(newEnd2, newEnd2 + (newEnd1 - oldEnd2))
-            // }
             var oldStart1 = oldStartN;
             var oldEnd1 = oldEndN;
             var newEnd1 = newEndN;
@@ -11706,13 +9116,13 @@ var ts;
             oldEndN = Math.max(oldEnd1, oldEnd1 + (oldEnd2 - newEnd1));
             newEndN = Math.max(newEnd2, newEnd2 + (newEnd1 - oldEnd2));
         }
-        return createTextChangeRange(createTextSpanFromBounds(oldStartN, oldEndN), /*newLength*/ newEndN - oldStartN);
+        return createTextChangeRange(createTextSpanFromBounds(oldStartN, oldEndN), newEndN - oldStartN);
     }
     ts.collapseTextChangeRangesAcrossMultipleVersions = collapseTextChangeRangesAcrossMultipleVersions;
     function getTypeParameterOwner(d) {
-        if (d && d.kind === 148 /* TypeParameter */) {
+        if (d && d.kind === 148) {
             for (var current = d; current; current = current.parent) {
-                if (ts.isFunctionLike(current) || ts.isClassLike(current) || current.kind === 236 /* InterfaceDeclaration */) {
+                if (ts.isFunctionLike(current) || ts.isClassLike(current) || current.kind === 236) {
                     return current;
                 }
             }
@@ -11720,7 +9130,7 @@ var ts;
     }
     ts.getTypeParameterOwner = getTypeParameterOwner;
     function isParameterPropertyDeclaration(node) {
-        return ts.hasModifier(node, 92 /* ParameterPropertyModifier */) && node.parent.kind === 155 /* Constructor */;
+        return ts.hasModifier(node, 92) && node.parent.kind === 155;
     }
     ts.isParameterPropertyDeclaration = isParameterPropertyDeclaration;
     function isEmptyBindingPattern(node) {
@@ -11738,7 +9148,7 @@ var ts;
     }
     ts.isEmptyBindingElement = isEmptyBindingElement;
     function walkUpBindingElementsAndPatterns(node) {
-        while (node && (node.kind === 182 /* BindingElement */ || ts.isBindingPattern(node))) {
+        while (node && (node.kind === 182 || ts.isBindingPattern(node))) {
             node = node.parent;
         }
         return node;
@@ -11746,46 +9156,35 @@ var ts;
     function getCombinedModifierFlags(node) {
         node = walkUpBindingElementsAndPatterns(node);
         var flags = ts.getModifierFlags(node);
-        if (node.kind === 232 /* VariableDeclaration */) {
+        if (node.kind === 232) {
             node = node.parent;
         }
-        if (node && node.kind === 233 /* VariableDeclarationList */) {
+        if (node && node.kind === 233) {
             flags |= ts.getModifierFlags(node);
             node = node.parent;
         }
-        if (node && node.kind === 214 /* VariableStatement */) {
+        if (node && node.kind === 214) {
             flags |= ts.getModifierFlags(node);
         }
         return flags;
     }
     ts.getCombinedModifierFlags = getCombinedModifierFlags;
-    // Returns the node flags for this node and all relevant parent nodes.  This is done so that
-    // nodes like variable declarations and binding elements can returned a view of their flags
-    // that includes the modifiers from their container.  i.e. flags like export/declare aren't
-    // stored on the variable declaration directly, but on the containing variable statement
-    // (if it has one).  Similarly, flags for let/const are store on the variable declaration
-    // list.  By calling this function, all those flags are combined so that the client can treat
-    // the node as if it actually had those flags.
     function getCombinedNodeFlags(node) {
         node = walkUpBindingElementsAndPatterns(node);
         var flags = node.flags;
-        if (node.kind === 232 /* VariableDeclaration */) {
+        if (node.kind === 232) {
             node = node.parent;
         }
-        if (node && node.kind === 233 /* VariableDeclarationList */) {
+        if (node && node.kind === 233) {
             flags |= node.flags;
             node = node.parent;
         }
-        if (node && node.kind === 214 /* VariableStatement */) {
+        if (node && node.kind === 214) {
             flags |= node.flags;
         }
         return flags;
     }
     ts.getCombinedNodeFlags = getCombinedNodeFlags;
-    /**
-     * Checks to see if the locale is in the appropriate format,
-     * and if it is, attempts to set the appropriate language.
-     */
     function validateLocaleAndSetLanguage(locale, sys, errors) {
         var matchResult = /^([a-z]+)([_\-]([a-z]+))?$/.exec(locale.toLowerCase());
         if (!matchResult) {
@@ -11796,12 +9195,9 @@ var ts;
         }
         var language = matchResult[1];
         var territory = matchResult[3];
-        // First try the entire locale, then fall back to just language if that's all we have.
-        // Either ways do not fail, and fallback to the English diagnostic strings.
         if (!trySetLanguageAndTerritory(language, territory, errors)) {
-            trySetLanguageAndTerritory(language, /*territory*/ undefined, errors);
+            trySetLanguageAndTerritory(language, undefined, errors);
         }
-        // Set the UI locale for string collation
         ts.setUILocale(locale);
         function trySetLanguageAndTerritory(language, territory, errors) {
             var compilerFilePath = ts.normalizePath(sys.getExecutingFilePath());
@@ -11814,7 +9210,6 @@ var ts;
             if (!sys.fileExists(filePath)) {
                 return false;
             }
-            // TODO: Add codePage support for readFile?
             var fileContents = "";
             try {
                 fileContents = sys.readFile(filePath);
@@ -11826,7 +9221,6 @@ var ts;
                 return false;
             }
             try {
-                // tslint:disable-next-line no-unnecessary-qualifier (making clear this is a global mutation!)
                 ts.localizedDiagnosticMessages = JSON.parse(fileContents);
             }
             catch (_a) {
@@ -11848,13 +9242,8 @@ var ts;
         return !nodeTest || nodeTest(node) ? node : undefined;
     }
     ts.getOriginalNode = getOriginalNode;
-    /**
-     * Gets a value indicating whether a node originated in the parse tree.
-     *
-     * @param node The node to test.
-     */
     function isParseTreeNode(node) {
-        return (node.flags & 8 /* Synthesized */) === 0;
+        return (node.flags & 8) === 0;
     }
     ts.isParseTreeNode = isParseTreeNode;
     function getParseTreeNode(node, nodeTest) {
@@ -11868,15 +9257,9 @@ var ts;
         return undefined;
     }
     ts.getParseTreeNode = getParseTreeNode;
-    /**
-     * Remove extra underscore from escaped identifier text content.
-     *
-     * @param identifier The escaped identifier text.
-     * @returns The unescaped identifier text.
-     */
     function unescapeLeadingUnderscores(identifier) {
         var id = identifier;
-        return id.length >= 3 && id.charCodeAt(0) === 95 /* _ */ && id.charCodeAt(1) === 95 /* _ */ && id.charCodeAt(2) === 95 /* _ */ ? id.substr(1) : id;
+        return id.length >= 3 && id.charCodeAt(0) === 95 && id.charCodeAt(1) === 95 && id.charCodeAt(2) === 95 ? id.substr(1) : id;
     }
     ts.unescapeLeadingUnderscores = unescapeLeadingUnderscores;
     function idText(identifier) {
@@ -11887,55 +9270,42 @@ var ts;
         return unescapeLeadingUnderscores(symbol.escapedName);
     }
     ts.symbolName = symbolName;
-    /**
-     * Remove extra underscore from escaped identifier text content.
-     * @deprecated Use `id.text` for the unescaped text.
-     * @param identifier The escaped identifier text.
-     * @returns The unescaped identifier text.
-     */
     function unescapeIdentifier(id) {
         return id;
     }
     ts.unescapeIdentifier = unescapeIdentifier;
-    /**
-     * A JSDocTypedef tag has an _optional_ name field - if a name is not directly present, we should
-     * attempt to draw the name from the node the declaration is on (as that declaration is what its' symbol
-     * will be merged with)
-     */
     function nameForNamelessJSDocTypedef(declaration) {
         var hostNode = declaration.parent.parent;
         if (!hostNode) {
             return undefined;
         }
-        // Covers classes, functions - any named declaration host node
         if (ts.isDeclaration(hostNode)) {
             return getDeclarationIdentifier(hostNode);
         }
-        // Covers remaining cases
         switch (hostNode.kind) {
-            case 214 /* VariableStatement */:
+            case 214:
                 if (hostNode.declarationList && hostNode.declarationList.declarations[0]) {
                     return getDeclarationIdentifier(hostNode.declarationList.declarations[0]);
                 }
                 return undefined;
-            case 216 /* ExpressionStatement */:
+            case 216:
                 var expr = hostNode.expression;
                 switch (expr.kind) {
-                    case 185 /* PropertyAccessExpression */:
+                    case 185:
                         return expr.name;
-                    case 186 /* ElementAccessExpression */:
+                    case 186:
                         var arg = expr.argumentExpression;
                         if (ts.isIdentifier(arg)) {
                             return arg;
                         }
                 }
                 return undefined;
-            case 1 /* EndOfFileToken */:
+            case 1:
                 return undefined;
-            case 191 /* ParenthesizedExpression */: {
+            case 191: {
                 return getDeclarationIdentifier(hostNode.expression);
             }
-            case 228 /* LabeledStatement */: {
+            case 228: {
                 if (ts.isDeclaration(hostNode.statement) || ts.isExpression(hostNode.statement)) {
                     return getDeclarationIdentifier(hostNode.statement);
                 }
@@ -11953,50 +9323,48 @@ var ts;
         return declaration.name || nameForNamelessJSDocTypedef(declaration);
     }
     ts.getNameOfJSDocTypedef = getNameOfJSDocTypedef;
-    /** @internal */
     function isNamedDeclaration(node) {
-        return !!node.name; // A 'name' property should always be a DeclarationName.
+        return !!node.name;
     }
     ts.isNamedDeclaration = isNamedDeclaration;
-    // TODO: GH#18217 This is often used as if it returns a defined result
     function getNameOfDeclaration(declaration) {
         if (!declaration) {
             return undefined;
         }
         switch (declaration.kind) {
-            case 205 /* ClassExpression */:
-            case 192 /* FunctionExpression */:
+            case 205:
+            case 192:
                 if (!declaration.name) {
                     return getAssignedName(declaration);
                 }
                 break;
-            case 71 /* Identifier */:
+            case 71:
                 return declaration;
-            case 298 /* JSDocPropertyTag */:
-            case 293 /* JSDocParameterTag */: {
+            case 298:
+            case 293: {
                 var name = declaration.name;
-                if (name.kind === 146 /* QualifiedName */) {
+                if (name.kind === 146) {
                     return name.right;
                 }
                 break;
             }
-            case 200 /* BinaryExpression */: {
+            case 200: {
                 var expr = declaration;
                 switch (ts.getSpecialPropertyAssignmentKind(expr)) {
-                    case 1 /* ExportsProperty */:
-                    case 4 /* ThisProperty */:
-                    case 5 /* Property */:
-                    case 3 /* PrototypeProperty */:
+                    case 1:
+                    case 4:
+                    case 5:
+                    case 3:
                         return expr.left.name;
                     default:
                         return undefined;
                 }
             }
-            case 292 /* JSDocCallbackTag */:
+            case 292:
                 return declaration.name;
-            case 297 /* JSDocTypedefTag */:
+            case 297:
                 return getNameOfJSDocTypedef(declaration);
-            case 249 /* ExportAssignment */: {
+            case 249: {
                 var expression = declaration.expression;
                 return ts.isIdentifier(expression) ? expression : undefined;
             }
@@ -12020,19 +9388,6 @@ var ts;
             }
         }
     }
-    /**
-     * Gets the JSDoc parameter tags for the node if present.
-     *
-     * @remarks Returns any JSDoc param tag that matches the provided
-     * parameter, whether a param tag on a containing function
-     * expression, or a param tag on a variable declaration whose
-     * initializer is the containing function. The tags closest to the
-     * node are returned first, so in the previous example, the param
-     * tag on the containing function expression would be first.
-     *
-     * Does not return tags for binding patterns, because JSDoc matches
-     * parameters by name and binding patterns do not have a name.
-     */
     function getJSDocParameterTags(param) {
         if (param.name) {
             if (ts.isIdentifier(param.name)) {
@@ -12048,43 +9403,30 @@ var ts;
                 }
             }
         }
-        // return empty array for: out-of-order binding patterns and JSDoc function syntax, which has un-named parameters
         return ts.emptyArray;
     }
     ts.getJSDocParameterTags = getJSDocParameterTags;
-    /**
-     * Return true if the node has JSDoc parameter tags.
-     *
-     * @remarks Includes parameter tags that are not directly on the node,
-     * for example on a variable declaration whose initializer is a function expression.
-     */
     function hasJSDocParameterTags(node) {
         return !!getFirstJSDocTag(node, ts.isJSDocParameterTag);
     }
     ts.hasJSDocParameterTags = hasJSDocParameterTags;
-    /** Gets the JSDoc augments tag for the node if present */
     function getJSDocAugmentsTag(node) {
         return getFirstJSDocTag(node, ts.isJSDocAugmentsTag);
     }
     ts.getJSDocAugmentsTag = getJSDocAugmentsTag;
-    /** Gets the JSDoc class tag for the node if present */
     function getJSDocClassTag(node) {
         return getFirstJSDocTag(node, ts.isJSDocClassTag);
     }
     ts.getJSDocClassTag = getJSDocClassTag;
-    /** Gets the JSDoc return tag for the node if present */
     function getJSDocReturnTag(node) {
         return getFirstJSDocTag(node, ts.isJSDocReturnTag);
     }
     ts.getJSDocReturnTag = getJSDocReturnTag;
-    /** Gets the JSDoc template tag for the node if present */
     function getJSDocTemplateTag(node) {
         return getFirstJSDocTag(node, ts.isJSDocTemplateTag);
     }
     ts.getJSDocTemplateTag = getJSDocTemplateTag;
-    /** Gets the JSDoc type tag for the node if present and valid */
     function getJSDocTypeTag(node) {
-        // We should have already issued an error if there were multiple type jsdocs, so just use the first one.
         var tag = getFirstJSDocTag(node, ts.isJSDocTypeTag);
         if (tag && tag.typeExpression && tag.typeExpression.type) {
             return tag;
@@ -12092,17 +9434,6 @@ var ts;
         return undefined;
     }
     ts.getJSDocTypeTag = getJSDocTypeTag;
-    /**
-     * Gets the type node for the node if provided via JSDoc.
-     *
-     * @remarks The search includes any JSDoc param tag that relates
-     * to the provided parameter, for example a type tag on the
-     * parameter itself, or a param tag on a containing function
-     * expression, or a param tag on a variable declaration whose
-     * initializer is the containing function. The tags closest to the
-     * node are examined first, so in the previous example, the type
-     * tag directly on the node would be returned.
-     */
     function getJSDocType(node) {
         var tag = getFirstJSDocTag(node, ts.isJSDocTypeTag);
         if (!tag && ts.isParameter(node)) {
@@ -12111,21 +9442,13 @@ var ts;
         return tag && tag.typeExpression && tag.typeExpression.type;
     }
     ts.getJSDocType = getJSDocType;
-    /**
-     * Gets the return type node for the node if provided via JSDoc's return tag.
-     *
-     * @remarks `getJSDocReturnTag` just gets the whole JSDoc tag. This function
-     * gets the type from inside the braces.
-     */
     function getJSDocReturnType(node) {
         var returnTag = getJSDocReturnTag(node);
         return returnTag && returnTag.typeExpression && returnTag.typeExpression.type;
     }
     ts.getJSDocReturnType = getJSDocReturnType;
-    /** Get all JSDoc tags related to a node, including those on parent nodes. */
     function getJSDocTags(node) {
         var tags = node.jsDocCache;
-        // If cache is 'null', that means we did the work of searching for JSDoc tags and came up with nothing.
         if (tags === undefined) {
             var comments = ts.getJSDocCommentsAndTags(node);
             ts.Debug.assert(comments.length < 2 || comments[0] !== comments[1]);
@@ -12134,745 +9457,706 @@ var ts;
         return tags;
     }
     ts.getJSDocTags = getJSDocTags;
-    /** Get the first JSDoc tag of a specified kind, or undefined if not present. */
     function getFirstJSDocTag(node, predicate) {
         return ts.find(getJSDocTags(node), predicate);
     }
-    /** Gets all JSDoc tags of a specified kind, or undefined if not present. */
     function getAllJSDocTagsOfKind(node, kind) {
         return getJSDocTags(node).filter(function (doc) { return doc.kind === kind; });
     }
     ts.getAllJSDocTagsOfKind = getAllJSDocTagsOfKind;
 })(ts || (ts = {}));
-// Simple node tests of the form `node.kind === SyntaxKind.Foo`.
 (function (ts) {
-    // Literals
     function isNumericLiteral(node) {
-        return node.kind === 8 /* NumericLiteral */;
+        return node.kind === 8;
     }
     ts.isNumericLiteral = isNumericLiteral;
     function isStringLiteral(node) {
-        return node.kind === 9 /* StringLiteral */;
+        return node.kind === 9;
     }
     ts.isStringLiteral = isStringLiteral;
     function isJsxText(node) {
-        return node.kind === 10 /* JsxText */;
+        return node.kind === 10;
     }
     ts.isJsxText = isJsxText;
     function isRegularExpressionLiteral(node) {
-        return node.kind === 12 /* RegularExpressionLiteral */;
+        return node.kind === 12;
     }
     ts.isRegularExpressionLiteral = isRegularExpressionLiteral;
     function isNoSubstitutionTemplateLiteral(node) {
-        return node.kind === 13 /* NoSubstitutionTemplateLiteral */;
+        return node.kind === 13;
     }
     ts.isNoSubstitutionTemplateLiteral = isNoSubstitutionTemplateLiteral;
-    // Pseudo-literals
     function isTemplateHead(node) {
-        return node.kind === 14 /* TemplateHead */;
+        return node.kind === 14;
     }
     ts.isTemplateHead = isTemplateHead;
     function isTemplateMiddle(node) {
-        return node.kind === 15 /* TemplateMiddle */;
+        return node.kind === 15;
     }
     ts.isTemplateMiddle = isTemplateMiddle;
     function isTemplateTail(node) {
-        return node.kind === 16 /* TemplateTail */;
+        return node.kind === 16;
     }
     ts.isTemplateTail = isTemplateTail;
     function isIdentifier(node) {
-        return node.kind === 71 /* Identifier */;
+        return node.kind === 71;
     }
     ts.isIdentifier = isIdentifier;
-    // Names
     function isQualifiedName(node) {
-        return node.kind === 146 /* QualifiedName */;
+        return node.kind === 146;
     }
     ts.isQualifiedName = isQualifiedName;
     function isComputedPropertyName(node) {
-        return node.kind === 147 /* ComputedPropertyName */;
+        return node.kind === 147;
     }
     ts.isComputedPropertyName = isComputedPropertyName;
-    // Signature elements
     function isTypeParameterDeclaration(node) {
-        return node.kind === 148 /* TypeParameter */;
+        return node.kind === 148;
     }
     ts.isTypeParameterDeclaration = isTypeParameterDeclaration;
     function isParameter(node) {
-        return node.kind === 149 /* Parameter */;
+        return node.kind === 149;
     }
     ts.isParameter = isParameter;
     function isDecorator(node) {
-        return node.kind === 150 /* Decorator */;
+        return node.kind === 150;
     }
     ts.isDecorator = isDecorator;
-    // TypeMember
     function isPropertySignature(node) {
-        return node.kind === 151 /* PropertySignature */;
+        return node.kind === 151;
     }
     ts.isPropertySignature = isPropertySignature;
     function isPropertyDeclaration(node) {
-        return node.kind === 152 /* PropertyDeclaration */;
+        return node.kind === 152;
     }
     ts.isPropertyDeclaration = isPropertyDeclaration;
     function isMethodSignature(node) {
-        return node.kind === 153 /* MethodSignature */;
+        return node.kind === 153;
     }
     ts.isMethodSignature = isMethodSignature;
     function isMethodDeclaration(node) {
-        return node.kind === 154 /* MethodDeclaration */;
+        return node.kind === 154;
     }
     ts.isMethodDeclaration = isMethodDeclaration;
     function isConstructorDeclaration(node) {
-        return node.kind === 155 /* Constructor */;
+        return node.kind === 155;
     }
     ts.isConstructorDeclaration = isConstructorDeclaration;
     function isGetAccessorDeclaration(node) {
-        return node.kind === 156 /* GetAccessor */;
+        return node.kind === 156;
     }
     ts.isGetAccessorDeclaration = isGetAccessorDeclaration;
     function isSetAccessorDeclaration(node) {
-        return node.kind === 157 /* SetAccessor */;
+        return node.kind === 157;
     }
     ts.isSetAccessorDeclaration = isSetAccessorDeclaration;
     function isCallSignatureDeclaration(node) {
-        return node.kind === 158 /* CallSignature */;
+        return node.kind === 158;
     }
     ts.isCallSignatureDeclaration = isCallSignatureDeclaration;
     function isConstructSignatureDeclaration(node) {
-        return node.kind === 159 /* ConstructSignature */;
+        return node.kind === 159;
     }
     ts.isConstructSignatureDeclaration = isConstructSignatureDeclaration;
     function isIndexSignatureDeclaration(node) {
-        return node.kind === 160 /* IndexSignature */;
+        return node.kind === 160;
     }
     ts.isIndexSignatureDeclaration = isIndexSignatureDeclaration;
-    /* @internal */
     function isGetOrSetAccessorDeclaration(node) {
-        return node.kind === 157 /* SetAccessor */ || node.kind === 156 /* GetAccessor */;
+        return node.kind === 157 || node.kind === 156;
     }
     ts.isGetOrSetAccessorDeclaration = isGetOrSetAccessorDeclaration;
-    // Type
     function isTypePredicateNode(node) {
-        return node.kind === 161 /* TypePredicate */;
+        return node.kind === 161;
     }
     ts.isTypePredicateNode = isTypePredicateNode;
     function isTypeReferenceNode(node) {
-        return node.kind === 162 /* TypeReference */;
+        return node.kind === 162;
     }
     ts.isTypeReferenceNode = isTypeReferenceNode;
     function isFunctionTypeNode(node) {
-        return node.kind === 163 /* FunctionType */;
+        return node.kind === 163;
     }
     ts.isFunctionTypeNode = isFunctionTypeNode;
     function isConstructorTypeNode(node) {
-        return node.kind === 164 /* ConstructorType */;
+        return node.kind === 164;
     }
     ts.isConstructorTypeNode = isConstructorTypeNode;
     function isTypeQueryNode(node) {
-        return node.kind === 165 /* TypeQuery */;
+        return node.kind === 165;
     }
     ts.isTypeQueryNode = isTypeQueryNode;
     function isTypeLiteralNode(node) {
-        return node.kind === 166 /* TypeLiteral */;
+        return node.kind === 166;
     }
     ts.isTypeLiteralNode = isTypeLiteralNode;
     function isArrayTypeNode(node) {
-        return node.kind === 167 /* ArrayType */;
+        return node.kind === 167;
     }
     ts.isArrayTypeNode = isArrayTypeNode;
     function isTupleTypeNode(node) {
-        return node.kind === 168 /* TupleType */;
+        return node.kind === 168;
     }
     ts.isTupleTypeNode = isTupleTypeNode;
     function isUnionTypeNode(node) {
-        return node.kind === 169 /* UnionType */;
+        return node.kind === 169;
     }
     ts.isUnionTypeNode = isUnionTypeNode;
     function isIntersectionTypeNode(node) {
-        return node.kind === 170 /* IntersectionType */;
+        return node.kind === 170;
     }
     ts.isIntersectionTypeNode = isIntersectionTypeNode;
     function isConditionalTypeNode(node) {
-        return node.kind === 171 /* ConditionalType */;
+        return node.kind === 171;
     }
     ts.isConditionalTypeNode = isConditionalTypeNode;
     function isInferTypeNode(node) {
-        return node.kind === 172 /* InferType */;
+        return node.kind === 172;
     }
     ts.isInferTypeNode = isInferTypeNode;
     function isParenthesizedTypeNode(node) {
-        return node.kind === 173 /* ParenthesizedType */;
+        return node.kind === 173;
     }
     ts.isParenthesizedTypeNode = isParenthesizedTypeNode;
     function isThisTypeNode(node) {
-        return node.kind === 174 /* ThisType */;
+        return node.kind === 174;
     }
     ts.isThisTypeNode = isThisTypeNode;
     function isTypeOperatorNode(node) {
-        return node.kind === 175 /* TypeOperator */;
+        return node.kind === 175;
     }
     ts.isTypeOperatorNode = isTypeOperatorNode;
     function isIndexedAccessTypeNode(node) {
-        return node.kind === 176 /* IndexedAccessType */;
+        return node.kind === 176;
     }
     ts.isIndexedAccessTypeNode = isIndexedAccessTypeNode;
     function isMappedTypeNode(node) {
-        return node.kind === 177 /* MappedType */;
+        return node.kind === 177;
     }
     ts.isMappedTypeNode = isMappedTypeNode;
     function isLiteralTypeNode(node) {
-        return node.kind === 178 /* LiteralType */;
+        return node.kind === 178;
     }
     ts.isLiteralTypeNode = isLiteralTypeNode;
     function isImportTypeNode(node) {
-        return node.kind === 179 /* ImportType */;
+        return node.kind === 179;
     }
     ts.isImportTypeNode = isImportTypeNode;
-    // Binding patterns
     function isObjectBindingPattern(node) {
-        return node.kind === 180 /* ObjectBindingPattern */;
+        return node.kind === 180;
     }
     ts.isObjectBindingPattern = isObjectBindingPattern;
     function isArrayBindingPattern(node) {
-        return node.kind === 181 /* ArrayBindingPattern */;
+        return node.kind === 181;
     }
     ts.isArrayBindingPattern = isArrayBindingPattern;
     function isBindingElement(node) {
-        return node.kind === 182 /* BindingElement */;
+        return node.kind === 182;
     }
     ts.isBindingElement = isBindingElement;
-    // Expression
     function isArrayLiteralExpression(node) {
-        return node.kind === 183 /* ArrayLiteralExpression */;
+        return node.kind === 183;
     }
     ts.isArrayLiteralExpression = isArrayLiteralExpression;
     function isObjectLiteralExpression(node) {
-        return node.kind === 184 /* ObjectLiteralExpression */;
+        return node.kind === 184;
     }
     ts.isObjectLiteralExpression = isObjectLiteralExpression;
     function isPropertyAccessExpression(node) {
-        return node.kind === 185 /* PropertyAccessExpression */;
+        return node.kind === 185;
     }
     ts.isPropertyAccessExpression = isPropertyAccessExpression;
     function isElementAccessExpression(node) {
-        return node.kind === 186 /* ElementAccessExpression */;
+        return node.kind === 186;
     }
     ts.isElementAccessExpression = isElementAccessExpression;
     function isCallExpression(node) {
-        return node.kind === 187 /* CallExpression */;
+        return node.kind === 187;
     }
     ts.isCallExpression = isCallExpression;
     function isNewExpression(node) {
-        return node.kind === 188 /* NewExpression */;
+        return node.kind === 188;
     }
     ts.isNewExpression = isNewExpression;
     function isTaggedTemplateExpression(node) {
-        return node.kind === 189 /* TaggedTemplateExpression */;
+        return node.kind === 189;
     }
     ts.isTaggedTemplateExpression = isTaggedTemplateExpression;
     function isTypeAssertion(node) {
-        return node.kind === 190 /* TypeAssertionExpression */;
+        return node.kind === 190;
     }
     ts.isTypeAssertion = isTypeAssertion;
     function isParenthesizedExpression(node) {
-        return node.kind === 191 /* ParenthesizedExpression */;
+        return node.kind === 191;
     }
     ts.isParenthesizedExpression = isParenthesizedExpression;
     function skipPartiallyEmittedExpressions(node) {
-        while (node.kind === 301 /* PartiallyEmittedExpression */) {
+        while (node.kind === 301) {
             node = node.expression;
         }
         return node;
     }
     ts.skipPartiallyEmittedExpressions = skipPartiallyEmittedExpressions;
     function isFunctionExpression(node) {
-        return node.kind === 192 /* FunctionExpression */;
+        return node.kind === 192;
     }
     ts.isFunctionExpression = isFunctionExpression;
     function isArrowFunction(node) {
-        return node.kind === 193 /* ArrowFunction */;
+        return node.kind === 193;
     }
     ts.isArrowFunction = isArrowFunction;
     function isDeleteExpression(node) {
-        return node.kind === 194 /* DeleteExpression */;
+        return node.kind === 194;
     }
     ts.isDeleteExpression = isDeleteExpression;
     function isTypeOfExpression(node) {
-        return node.kind === 195 /* TypeOfExpression */;
+        return node.kind === 195;
     }
     ts.isTypeOfExpression = isTypeOfExpression;
     function isVoidExpression(node) {
-        return node.kind === 196 /* VoidExpression */;
+        return node.kind === 196;
     }
     ts.isVoidExpression = isVoidExpression;
     function isAwaitExpression(node) {
-        return node.kind === 197 /* AwaitExpression */;
+        return node.kind === 197;
     }
     ts.isAwaitExpression = isAwaitExpression;
     function isPrefixUnaryExpression(node) {
-        return node.kind === 198 /* PrefixUnaryExpression */;
+        return node.kind === 198;
     }
     ts.isPrefixUnaryExpression = isPrefixUnaryExpression;
     function isPostfixUnaryExpression(node) {
-        return node.kind === 199 /* PostfixUnaryExpression */;
+        return node.kind === 199;
     }
     ts.isPostfixUnaryExpression = isPostfixUnaryExpression;
     function isBinaryExpression(node) {
-        return node.kind === 200 /* BinaryExpression */;
+        return node.kind === 200;
     }
     ts.isBinaryExpression = isBinaryExpression;
     function isConditionalExpression(node) {
-        return node.kind === 201 /* ConditionalExpression */;
+        return node.kind === 201;
     }
     ts.isConditionalExpression = isConditionalExpression;
     function isTemplateExpression(node) {
-        return node.kind === 202 /* TemplateExpression */;
+        return node.kind === 202;
     }
     ts.isTemplateExpression = isTemplateExpression;
     function isYieldExpression(node) {
-        return node.kind === 203 /* YieldExpression */;
+        return node.kind === 203;
     }
     ts.isYieldExpression = isYieldExpression;
     function isSpreadElement(node) {
-        return node.kind === 204 /* SpreadElement */;
+        return node.kind === 204;
     }
     ts.isSpreadElement = isSpreadElement;
     function isClassExpression(node) {
-        return node.kind === 205 /* ClassExpression */;
+        return node.kind === 205;
     }
     ts.isClassExpression = isClassExpression;
     function isOmittedExpression(node) {
-        return node.kind === 206 /* OmittedExpression */;
+        return node.kind === 206;
     }
     ts.isOmittedExpression = isOmittedExpression;
     function isExpressionWithTypeArguments(node) {
-        return node.kind === 207 /* ExpressionWithTypeArguments */;
+        return node.kind === 207;
     }
     ts.isExpressionWithTypeArguments = isExpressionWithTypeArguments;
     function isAsExpression(node) {
-        return node.kind === 208 /* AsExpression */;
+        return node.kind === 208;
     }
     ts.isAsExpression = isAsExpression;
     function isNonNullExpression(node) {
-        return node.kind === 209 /* NonNullExpression */;
+        return node.kind === 209;
     }
     ts.isNonNullExpression = isNonNullExpression;
     function isMetaProperty(node) {
-        return node.kind === 210 /* MetaProperty */;
+        return node.kind === 210;
     }
     ts.isMetaProperty = isMetaProperty;
-    // Misc
     function isTemplateSpan(node) {
-        return node.kind === 211 /* TemplateSpan */;
+        return node.kind === 211;
     }
     ts.isTemplateSpan = isTemplateSpan;
     function isSemicolonClassElement(node) {
-        return node.kind === 212 /* SemicolonClassElement */;
+        return node.kind === 212;
     }
     ts.isSemicolonClassElement = isSemicolonClassElement;
-    // Block
     function isBlock(node) {
-        return node.kind === 213 /* Block */;
+        return node.kind === 213;
     }
     ts.isBlock = isBlock;
     function isVariableStatement(node) {
-        return node.kind === 214 /* VariableStatement */;
+        return node.kind === 214;
     }
     ts.isVariableStatement = isVariableStatement;
     function isEmptyStatement(node) {
-        return node.kind === 215 /* EmptyStatement */;
+        return node.kind === 215;
     }
     ts.isEmptyStatement = isEmptyStatement;
     function isExpressionStatement(node) {
-        return node.kind === 216 /* ExpressionStatement */;
+        return node.kind === 216;
     }
     ts.isExpressionStatement = isExpressionStatement;
     function isIfStatement(node) {
-        return node.kind === 217 /* IfStatement */;
+        return node.kind === 217;
     }
     ts.isIfStatement = isIfStatement;
     function isDoStatement(node) {
-        return node.kind === 218 /* DoStatement */;
+        return node.kind === 218;
     }
     ts.isDoStatement = isDoStatement;
     function isWhileStatement(node) {
-        return node.kind === 219 /* WhileStatement */;
+        return node.kind === 219;
     }
     ts.isWhileStatement = isWhileStatement;
     function isForStatement(node) {
-        return node.kind === 220 /* ForStatement */;
+        return node.kind === 220;
     }
     ts.isForStatement = isForStatement;
     function isForInStatement(node) {
-        return node.kind === 221 /* ForInStatement */;
+        return node.kind === 221;
     }
     ts.isForInStatement = isForInStatement;
     function isForOfStatement(node) {
-        return node.kind === 222 /* ForOfStatement */;
+        return node.kind === 222;
     }
     ts.isForOfStatement = isForOfStatement;
     function isContinueStatement(node) {
-        return node.kind === 223 /* ContinueStatement */;
+        return node.kind === 223;
     }
     ts.isContinueStatement = isContinueStatement;
     function isBreakStatement(node) {
-        return node.kind === 224 /* BreakStatement */;
+        return node.kind === 224;
     }
     ts.isBreakStatement = isBreakStatement;
     function isBreakOrContinueStatement(node) {
-        return node.kind === 224 /* BreakStatement */ || node.kind === 223 /* ContinueStatement */;
+        return node.kind === 224 || node.kind === 223;
     }
     ts.isBreakOrContinueStatement = isBreakOrContinueStatement;
     function isReturnStatement(node) {
-        return node.kind === 225 /* ReturnStatement */;
+        return node.kind === 225;
     }
     ts.isReturnStatement = isReturnStatement;
     function isWithStatement(node) {
-        return node.kind === 226 /* WithStatement */;
+        return node.kind === 226;
     }
     ts.isWithStatement = isWithStatement;
     function isSwitchStatement(node) {
-        return node.kind === 227 /* SwitchStatement */;
+        return node.kind === 227;
     }
     ts.isSwitchStatement = isSwitchStatement;
     function isLabeledStatement(node) {
-        return node.kind === 228 /* LabeledStatement */;
+        return node.kind === 228;
     }
     ts.isLabeledStatement = isLabeledStatement;
     function isThrowStatement(node) {
-        return node.kind === 229 /* ThrowStatement */;
+        return node.kind === 229;
     }
     ts.isThrowStatement = isThrowStatement;
     function isTryStatement(node) {
-        return node.kind === 230 /* TryStatement */;
+        return node.kind === 230;
     }
     ts.isTryStatement = isTryStatement;
     function isDebuggerStatement(node) {
-        return node.kind === 231 /* DebuggerStatement */;
+        return node.kind === 231;
     }
     ts.isDebuggerStatement = isDebuggerStatement;
     function isVariableDeclaration(node) {
-        return node.kind === 232 /* VariableDeclaration */;
+        return node.kind === 232;
     }
     ts.isVariableDeclaration = isVariableDeclaration;
     function isVariableDeclarationList(node) {
-        return node.kind === 233 /* VariableDeclarationList */;
+        return node.kind === 233;
     }
     ts.isVariableDeclarationList = isVariableDeclarationList;
     function isFunctionDeclaration(node) {
-        return node.kind === 234 /* FunctionDeclaration */;
+        return node.kind === 234;
     }
     ts.isFunctionDeclaration = isFunctionDeclaration;
     function isClassDeclaration(node) {
-        return node.kind === 235 /* ClassDeclaration */;
+        return node.kind === 235;
     }
     ts.isClassDeclaration = isClassDeclaration;
     function isInterfaceDeclaration(node) {
-        return node.kind === 236 /* InterfaceDeclaration */;
+        return node.kind === 236;
     }
     ts.isInterfaceDeclaration = isInterfaceDeclaration;
     function isTypeAliasDeclaration(node) {
-        return node.kind === 237 /* TypeAliasDeclaration */;
+        return node.kind === 237;
     }
     ts.isTypeAliasDeclaration = isTypeAliasDeclaration;
     function isEnumDeclaration(node) {
-        return node.kind === 238 /* EnumDeclaration */;
+        return node.kind === 238;
     }
     ts.isEnumDeclaration = isEnumDeclaration;
     function isModuleDeclaration(node) {
-        return node.kind === 239 /* ModuleDeclaration */;
+        return node.kind === 239;
     }
     ts.isModuleDeclaration = isModuleDeclaration;
     function isModuleBlock(node) {
-        return node.kind === 240 /* ModuleBlock */;
+        return node.kind === 240;
     }
     ts.isModuleBlock = isModuleBlock;
     function isCaseBlock(node) {
-        return node.kind === 241 /* CaseBlock */;
+        return node.kind === 241;
     }
     ts.isCaseBlock = isCaseBlock;
     function isNamespaceExportDeclaration(node) {
-        return node.kind === 242 /* NamespaceExportDeclaration */;
+        return node.kind === 242;
     }
     ts.isNamespaceExportDeclaration = isNamespaceExportDeclaration;
     function isImportEqualsDeclaration(node) {
-        return node.kind === 243 /* ImportEqualsDeclaration */;
+        return node.kind === 243;
     }
     ts.isImportEqualsDeclaration = isImportEqualsDeclaration;
     function isImportDeclaration(node) {
-        return node.kind === 244 /* ImportDeclaration */;
+        return node.kind === 244;
     }
     ts.isImportDeclaration = isImportDeclaration;
     function isImportClause(node) {
-        return node.kind === 245 /* ImportClause */;
+        return node.kind === 245;
     }
     ts.isImportClause = isImportClause;
     function isNamespaceImport(node) {
-        return node.kind === 246 /* NamespaceImport */;
+        return node.kind === 246;
     }
     ts.isNamespaceImport = isNamespaceImport;
     function isNamedImports(node) {
-        return node.kind === 247 /* NamedImports */;
+        return node.kind === 247;
     }
     ts.isNamedImports = isNamedImports;
     function isImportSpecifier(node) {
-        return node.kind === 248 /* ImportSpecifier */;
+        return node.kind === 248;
     }
     ts.isImportSpecifier = isImportSpecifier;
     function isExportAssignment(node) {
-        return node.kind === 249 /* ExportAssignment */;
+        return node.kind === 249;
     }
     ts.isExportAssignment = isExportAssignment;
     function isExportDeclaration(node) {
-        return node.kind === 250 /* ExportDeclaration */;
+        return node.kind === 250;
     }
     ts.isExportDeclaration = isExportDeclaration;
     function isNamedExports(node) {
-        return node.kind === 251 /* NamedExports */;
+        return node.kind === 251;
     }
     ts.isNamedExports = isNamedExports;
     function isExportSpecifier(node) {
-        return node.kind === 252 /* ExportSpecifier */;
+        return node.kind === 252;
     }
     ts.isExportSpecifier = isExportSpecifier;
     function isMissingDeclaration(node) {
-        return node.kind === 253 /* MissingDeclaration */;
+        return node.kind === 253;
     }
     ts.isMissingDeclaration = isMissingDeclaration;
-    // Module References
     function isExternalModuleReference(node) {
-        return node.kind === 254 /* ExternalModuleReference */;
+        return node.kind === 254;
     }
     ts.isExternalModuleReference = isExternalModuleReference;
-    // JSX
     function isJsxElement(node) {
-        return node.kind === 255 /* JsxElement */;
+        return node.kind === 255;
     }
     ts.isJsxElement = isJsxElement;
     function isJsxSelfClosingElement(node) {
-        return node.kind === 256 /* JsxSelfClosingElement */;
+        return node.kind === 256;
     }
     ts.isJsxSelfClosingElement = isJsxSelfClosingElement;
     function isJsxOpeningElement(node) {
-        return node.kind === 257 /* JsxOpeningElement */;
+        return node.kind === 257;
     }
     ts.isJsxOpeningElement = isJsxOpeningElement;
     function isJsxClosingElement(node) {
-        return node.kind === 258 /* JsxClosingElement */;
+        return node.kind === 258;
     }
     ts.isJsxClosingElement = isJsxClosingElement;
     function isJsxFragment(node) {
-        return node.kind === 259 /* JsxFragment */;
+        return node.kind === 259;
     }
     ts.isJsxFragment = isJsxFragment;
     function isJsxOpeningFragment(node) {
-        return node.kind === 260 /* JsxOpeningFragment */;
+        return node.kind === 260;
     }
     ts.isJsxOpeningFragment = isJsxOpeningFragment;
     function isJsxClosingFragment(node) {
-        return node.kind === 261 /* JsxClosingFragment */;
+        return node.kind === 261;
     }
     ts.isJsxClosingFragment = isJsxClosingFragment;
     function isJsxAttribute(node) {
-        return node.kind === 262 /* JsxAttribute */;
+        return node.kind === 262;
     }
     ts.isJsxAttribute = isJsxAttribute;
     function isJsxAttributes(node) {
-        return node.kind === 263 /* JsxAttributes */;
+        return node.kind === 263;
     }
     ts.isJsxAttributes = isJsxAttributes;
     function isJsxSpreadAttribute(node) {
-        return node.kind === 264 /* JsxSpreadAttribute */;
+        return node.kind === 264;
     }
     ts.isJsxSpreadAttribute = isJsxSpreadAttribute;
     function isJsxExpression(node) {
-        return node.kind === 265 /* JsxExpression */;
+        return node.kind === 265;
     }
     ts.isJsxExpression = isJsxExpression;
-    // Clauses
     function isCaseClause(node) {
-        return node.kind === 266 /* CaseClause */;
+        return node.kind === 266;
     }
     ts.isCaseClause = isCaseClause;
     function isDefaultClause(node) {
-        return node.kind === 267 /* DefaultClause */;
+        return node.kind === 267;
     }
     ts.isDefaultClause = isDefaultClause;
     function isHeritageClause(node) {
-        return node.kind === 268 /* HeritageClause */;
+        return node.kind === 268;
     }
     ts.isHeritageClause = isHeritageClause;
     function isCatchClause(node) {
-        return node.kind === 269 /* CatchClause */;
+        return node.kind === 269;
     }
     ts.isCatchClause = isCatchClause;
-    // Property assignments
     function isPropertyAssignment(node) {
-        return node.kind === 270 /* PropertyAssignment */;
+        return node.kind === 270;
     }
     ts.isPropertyAssignment = isPropertyAssignment;
     function isShorthandPropertyAssignment(node) {
-        return node.kind === 271 /* ShorthandPropertyAssignment */;
+        return node.kind === 271;
     }
     ts.isShorthandPropertyAssignment = isShorthandPropertyAssignment;
     function isSpreadAssignment(node) {
-        return node.kind === 272 /* SpreadAssignment */;
+        return node.kind === 272;
     }
     ts.isSpreadAssignment = isSpreadAssignment;
-    // Enum
     function isEnumMember(node) {
-        return node.kind === 273 /* EnumMember */;
+        return node.kind === 273;
     }
     ts.isEnumMember = isEnumMember;
-    // Top-level nodes
     function isSourceFile(node) {
-        return node.kind === 274 /* SourceFile */;
+        return node.kind === 274;
     }
     ts.isSourceFile = isSourceFile;
     function isBundle(node) {
-        return node.kind === 275 /* Bundle */;
+        return node.kind === 275;
     }
     ts.isBundle = isBundle;
     function isUnparsedSource(node) {
-        return node.kind === 276 /* UnparsedSource */;
+        return node.kind === 276;
     }
     ts.isUnparsedSource = isUnparsedSource;
-    // JSDoc
     function isJSDocTypeExpression(node) {
-        return node.kind === 278 /* JSDocTypeExpression */;
+        return node.kind === 278;
     }
     ts.isJSDocTypeExpression = isJSDocTypeExpression;
     function isJSDocAllType(node) {
-        return node.kind === 279 /* JSDocAllType */;
+        return node.kind === 279;
     }
     ts.isJSDocAllType = isJSDocAllType;
     function isJSDocUnknownType(node) {
-        return node.kind === 280 /* JSDocUnknownType */;
+        return node.kind === 280;
     }
     ts.isJSDocUnknownType = isJSDocUnknownType;
     function isJSDocNullableType(node) {
-        return node.kind === 281 /* JSDocNullableType */;
+        return node.kind === 281;
     }
     ts.isJSDocNullableType = isJSDocNullableType;
     function isJSDocNonNullableType(node) {
-        return node.kind === 282 /* JSDocNonNullableType */;
+        return node.kind === 282;
     }
     ts.isJSDocNonNullableType = isJSDocNonNullableType;
     function isJSDocOptionalType(node) {
-        return node.kind === 283 /* JSDocOptionalType */;
+        return node.kind === 283;
     }
     ts.isJSDocOptionalType = isJSDocOptionalType;
     function isJSDocFunctionType(node) {
-        return node.kind === 284 /* JSDocFunctionType */;
+        return node.kind === 284;
     }
     ts.isJSDocFunctionType = isJSDocFunctionType;
     function isJSDocVariadicType(node) {
-        return node.kind === 285 /* JSDocVariadicType */;
+        return node.kind === 285;
     }
     ts.isJSDocVariadicType = isJSDocVariadicType;
     function isJSDoc(node) {
-        return node.kind === 286 /* JSDocComment */;
+        return node.kind === 286;
     }
     ts.isJSDoc = isJSDoc;
     function isJSDocAugmentsTag(node) {
-        return node.kind === 290 /* JSDocAugmentsTag */;
+        return node.kind === 290;
     }
     ts.isJSDocAugmentsTag = isJSDocAugmentsTag;
     function isJSDocClassTag(node) {
-        return node.kind === 291 /* JSDocClassTag */;
+        return node.kind === 291;
     }
     ts.isJSDocClassTag = isJSDocClassTag;
     function isJSDocParameterTag(node) {
-        return node.kind === 293 /* JSDocParameterTag */;
+        return node.kind === 293;
     }
     ts.isJSDocParameterTag = isJSDocParameterTag;
     function isJSDocReturnTag(node) {
-        return node.kind === 294 /* JSDocReturnTag */;
+        return node.kind === 294;
     }
     ts.isJSDocReturnTag = isJSDocReturnTag;
     function isJSDocTypeTag(node) {
-        return node.kind === 295 /* JSDocTypeTag */;
+        return node.kind === 295;
     }
     ts.isJSDocTypeTag = isJSDocTypeTag;
     function isJSDocTemplateTag(node) {
-        return node.kind === 296 /* JSDocTemplateTag */;
+        return node.kind === 296;
     }
     ts.isJSDocTemplateTag = isJSDocTemplateTag;
     function isJSDocTypedefTag(node) {
-        return node.kind === 297 /* JSDocTypedefTag */;
+        return node.kind === 297;
     }
     ts.isJSDocTypedefTag = isJSDocTypedefTag;
     function isJSDocPropertyTag(node) {
-        return node.kind === 298 /* JSDocPropertyTag */;
+        return node.kind === 298;
     }
     ts.isJSDocPropertyTag = isJSDocPropertyTag;
     function isJSDocPropertyLikeTag(node) {
-        return node.kind === 298 /* JSDocPropertyTag */ || node.kind === 293 /* JSDocParameterTag */;
+        return node.kind === 298 || node.kind === 293;
     }
     ts.isJSDocPropertyLikeTag = isJSDocPropertyLikeTag;
     function isJSDocTypeLiteral(node) {
-        return node.kind === 287 /* JSDocTypeLiteral */;
+        return node.kind === 287;
     }
     ts.isJSDocTypeLiteral = isJSDocTypeLiteral;
     function isJSDocCallbackTag(node) {
-        return node.kind === 292 /* JSDocCallbackTag */;
+        return node.kind === 292;
     }
     ts.isJSDocCallbackTag = isJSDocCallbackTag;
     function isJSDocSignature(node) {
-        return node.kind === 288 /* JSDocSignature */;
+        return node.kind === 288;
     }
     ts.isJSDocSignature = isJSDocSignature;
 })(ts || (ts = {}));
-// Node tests
-//
-// All node tests in the following list should *not* reference parent pointers so that
-// they may be used with transformations.
 (function (ts) {
-    /* @internal */
     function isSyntaxList(n) {
-        return n.kind === 299 /* SyntaxList */;
+        return n.kind === 299;
     }
     ts.isSyntaxList = isSyntaxList;
-    /* @internal */
     function isNode(node) {
         return isNodeKind(node.kind);
     }
     ts.isNode = isNode;
-    /* @internal */
     function isNodeKind(kind) {
-        return kind >= 146 /* FirstNode */;
+        return kind >= 146;
     }
     ts.isNodeKind = isNodeKind;
-    /**
-     * True if node is of some token syntax kind.
-     * For example, this is true for an IfKeyword but not for an IfStatement.
-     * Literals are considered tokens, except TemplateLiteral, but does include TemplateHead/Middle/Tail.
-     */
     function isToken(n) {
-        return n.kind >= 0 /* FirstToken */ && n.kind <= 145 /* LastToken */;
+        return n.kind >= 0 && n.kind <= 145;
     }
     ts.isToken = isToken;
-    // Node Arrays
-    /* @internal */
     function isNodeArray(array) {
         return array.hasOwnProperty("pos") && array.hasOwnProperty("end");
     }
     ts.isNodeArray = isNodeArray;
-    // Literals
-    /* @internal */
     function isLiteralKind(kind) {
-        return 8 /* FirstLiteralToken */ <= kind && kind <= 13 /* LastLiteralToken */;
+        return 8 <= kind && kind <= 13;
     }
     ts.isLiteralKind = isLiteralKind;
     function isLiteralExpression(node) {
         return isLiteralKind(node.kind);
     }
     ts.isLiteralExpression = isLiteralExpression;
-    // Pseudo-literals
-    /* @internal */
     function isTemplateLiteralKind(kind) {
-        return 13 /* FirstTemplateToken */ <= kind && kind <= 16 /* LastTemplateToken */;
+        return 13 <= kind && kind <= 16;
     }
     ts.isTemplateLiteralKind = isTemplateLiteralKind;
     function isTemplateLiteralToken(node) {
@@ -12881,48 +10165,42 @@ var ts;
     ts.isTemplateLiteralToken = isTemplateLiteralToken;
     function isTemplateMiddleOrTemplateTail(node) {
         var kind = node.kind;
-        return kind === 15 /* TemplateMiddle */
-            || kind === 16 /* TemplateTail */;
+        return kind === 15
+            || kind === 16;
     }
     ts.isTemplateMiddleOrTemplateTail = isTemplateMiddleOrTemplateTail;
     function isStringTextContainingNode(node) {
-        return node.kind === 9 /* StringLiteral */ || isTemplateLiteralKind(node.kind);
+        return node.kind === 9 || isTemplateLiteralKind(node.kind);
     }
     ts.isStringTextContainingNode = isStringTextContainingNode;
-    // Identifiers
-    /* @internal */
     function isGeneratedIdentifier(node) {
-        return ts.isIdentifier(node) && (node.autoGenerateFlags & 7 /* KindMask */) > 0 /* None */;
+        return ts.isIdentifier(node) && (node.autoGenerateFlags & 7) > 0;
     }
     ts.isGeneratedIdentifier = isGeneratedIdentifier;
-    // Keywords
-    /* @internal */
     function isModifierKind(token) {
         switch (token) {
-            case 117 /* AbstractKeyword */:
-            case 120 /* AsyncKeyword */:
-            case 76 /* ConstKeyword */:
-            case 124 /* DeclareKeyword */:
-            case 79 /* DefaultKeyword */:
-            case 84 /* ExportKeyword */:
-            case 114 /* PublicKeyword */:
-            case 112 /* PrivateKeyword */:
-            case 113 /* ProtectedKeyword */:
-            case 132 /* ReadonlyKeyword */:
-            case 115 /* StaticKeyword */:
+            case 117:
+            case 120:
+            case 76:
+            case 124:
+            case 79:
+            case 84:
+            case 114:
+            case 112:
+            case 113:
+            case 132:
+            case 115:
                 return true;
         }
         return false;
     }
     ts.isModifierKind = isModifierKind;
-    /* @internal */
     function isParameterPropertyModifier(kind) {
-        return !!(ts.modifierToFlag(kind) & 92 /* ParameterPropertyModifier */);
+        return !!(ts.modifierToFlag(kind) & 92);
     }
     ts.isParameterPropertyModifier = isParameterPropertyModifier;
-    /* @internal */
     function isClassMemberModifier(idToken) {
-        return isParameterPropertyModifier(idToken) || idToken === 115 /* StaticKeyword */;
+        return isParameterPropertyModifier(idToken) || idToken === 115;
     }
     ts.isClassMemberModifier = isClassMemberModifier;
     function isModifier(node) {
@@ -12931,111 +10209,104 @@ var ts;
     ts.isModifier = isModifier;
     function isEntityName(node) {
         var kind = node.kind;
-        return kind === 146 /* QualifiedName */
-            || kind === 71 /* Identifier */;
+        return kind === 146
+            || kind === 71;
     }
     ts.isEntityName = isEntityName;
     function isPropertyName(node) {
         var kind = node.kind;
-        return kind === 71 /* Identifier */
-            || kind === 9 /* StringLiteral */
-            || kind === 8 /* NumericLiteral */
-            || kind === 147 /* ComputedPropertyName */;
+        return kind === 71
+            || kind === 9
+            || kind === 8
+            || kind === 147;
     }
     ts.isPropertyName = isPropertyName;
     function isBindingName(node) {
         var kind = node.kind;
-        return kind === 71 /* Identifier */
-            || kind === 180 /* ObjectBindingPattern */
-            || kind === 181 /* ArrayBindingPattern */;
+        return kind === 71
+            || kind === 180
+            || kind === 181;
     }
     ts.isBindingName = isBindingName;
-    // Functions
     function isFunctionLike(node) {
         return node && isFunctionLikeKind(node.kind);
     }
     ts.isFunctionLike = isFunctionLike;
-    /* @internal */
     function isFunctionLikeDeclaration(node) {
         return node && isFunctionLikeDeclarationKind(node.kind);
     }
     ts.isFunctionLikeDeclaration = isFunctionLikeDeclaration;
     function isFunctionLikeDeclarationKind(kind) {
         switch (kind) {
-            case 234 /* FunctionDeclaration */:
-            case 154 /* MethodDeclaration */:
-            case 155 /* Constructor */:
-            case 156 /* GetAccessor */:
-            case 157 /* SetAccessor */:
-            case 192 /* FunctionExpression */:
-            case 193 /* ArrowFunction */:
+            case 234:
+            case 154:
+            case 155:
+            case 156:
+            case 157:
+            case 192:
+            case 193:
                 return true;
             default:
                 return false;
         }
     }
-    /* @internal */
     function isFunctionLikeKind(kind) {
         switch (kind) {
-            case 153 /* MethodSignature */:
-            case 158 /* CallSignature */:
-            case 288 /* JSDocSignature */:
-            case 159 /* ConstructSignature */:
-            case 160 /* IndexSignature */:
-            case 163 /* FunctionType */:
-            case 284 /* JSDocFunctionType */:
-            case 164 /* ConstructorType */:
+            case 153:
+            case 158:
+            case 288:
+            case 159:
+            case 160:
+            case 163:
+            case 284:
+            case 164:
                 return true;
             default:
                 return isFunctionLikeDeclarationKind(kind);
         }
     }
     ts.isFunctionLikeKind = isFunctionLikeKind;
-    /* @internal */
     function isFunctionOrModuleBlock(node) {
         return ts.isSourceFile(node) || ts.isModuleBlock(node) || ts.isBlock(node) && isFunctionLike(node.parent);
     }
     ts.isFunctionOrModuleBlock = isFunctionOrModuleBlock;
-    // Classes
     function isClassElement(node) {
         var kind = node.kind;
-        return kind === 155 /* Constructor */
-            || kind === 152 /* PropertyDeclaration */
-            || kind === 154 /* MethodDeclaration */
-            || kind === 156 /* GetAccessor */
-            || kind === 157 /* SetAccessor */
-            || kind === 160 /* IndexSignature */
-            || kind === 212 /* SemicolonClassElement */;
+        return kind === 155
+            || kind === 152
+            || kind === 154
+            || kind === 156
+            || kind === 157
+            || kind === 160
+            || kind === 212;
     }
     ts.isClassElement = isClassElement;
     function isClassLike(node) {
-        return node && (node.kind === 235 /* ClassDeclaration */ || node.kind === 205 /* ClassExpression */);
+        return node && (node.kind === 235 || node.kind === 205);
     }
     ts.isClassLike = isClassLike;
     function isAccessor(node) {
-        return node && (node.kind === 156 /* GetAccessor */ || node.kind === 157 /* SetAccessor */);
+        return node && (node.kind === 156 || node.kind === 157);
     }
     ts.isAccessor = isAccessor;
-    /* @internal */
     function isMethodOrAccessor(node) {
         switch (node.kind) {
-            case 154 /* MethodDeclaration */:
-            case 156 /* GetAccessor */:
-            case 157 /* SetAccessor */:
+            case 154:
+            case 156:
+            case 157:
                 return true;
             default:
                 return false;
         }
     }
     ts.isMethodOrAccessor = isMethodOrAccessor;
-    // Type members
     function isTypeElement(node) {
         var kind = node.kind;
-        return kind === 159 /* ConstructSignature */
-            || kind === 158 /* CallSignature */
-            || kind === 151 /* PropertySignature */
-            || kind === 153 /* MethodSignature */
-            || kind === 160 /* IndexSignature */;
+        return kind === 159
+            || kind === 158
+            || kind === 151
+            || kind === 153
+            || kind === 160;
     }
     ts.isTypeElement = isTypeElement;
     function isClassOrTypeElement(node) {
@@ -13044,153 +10315,125 @@ var ts;
     ts.isClassOrTypeElement = isClassOrTypeElement;
     function isObjectLiteralElementLike(node) {
         var kind = node.kind;
-        return kind === 270 /* PropertyAssignment */
-            || kind === 271 /* ShorthandPropertyAssignment */
-            || kind === 272 /* SpreadAssignment */
-            || kind === 154 /* MethodDeclaration */
-            || kind === 156 /* GetAccessor */
-            || kind === 157 /* SetAccessor */;
+        return kind === 270
+            || kind === 271
+            || kind === 272
+            || kind === 154
+            || kind === 156
+            || kind === 157;
     }
     ts.isObjectLiteralElementLike = isObjectLiteralElementLike;
-    // Type
     function isTypeNodeKind(kind) {
-        return (kind >= 161 /* FirstTypeNode */ && kind <= 179 /* LastTypeNode */)
-            || kind === 119 /* AnyKeyword */
-            || kind === 142 /* UnknownKeyword */
-            || kind === 134 /* NumberKeyword */
-            || kind === 135 /* ObjectKeyword */
-            || kind === 122 /* BooleanKeyword */
-            || kind === 137 /* StringKeyword */
-            || kind === 138 /* SymbolKeyword */
-            || kind === 99 /* ThisKeyword */
-            || kind === 105 /* VoidKeyword */
-            || kind === 140 /* UndefinedKeyword */
-            || kind === 95 /* NullKeyword */
-            || kind === 131 /* NeverKeyword */
-            || kind === 207 /* ExpressionWithTypeArguments */
-            || kind === 279 /* JSDocAllType */
-            || kind === 280 /* JSDocUnknownType */
-            || kind === 281 /* JSDocNullableType */
-            || kind === 282 /* JSDocNonNullableType */
-            || kind === 283 /* JSDocOptionalType */
-            || kind === 284 /* JSDocFunctionType */
-            || kind === 285 /* JSDocVariadicType */;
-    }
-    /**
-     * Node test that determines whether a node is a valid type node.
-     * This differs from the `isPartOfTypeNode` function which determines whether a node is *part*
-     * of a TypeNode.
-     */
+        return (kind >= 161 && kind <= 179)
+            || kind === 119
+            || kind === 142
+            || kind === 134
+            || kind === 135
+            || kind === 122
+            || kind === 137
+            || kind === 138
+            || kind === 99
+            || kind === 105
+            || kind === 140
+            || kind === 95
+            || kind === 131
+            || kind === 207
+            || kind === 279
+            || kind === 280
+            || kind === 281
+            || kind === 282
+            || kind === 283
+            || kind === 284
+            || kind === 285;
+    }
     function isTypeNode(node) {
         return isTypeNodeKind(node.kind);
     }
     ts.isTypeNode = isTypeNode;
     function isFunctionOrConstructorTypeNode(node) {
         switch (node.kind) {
-            case 163 /* FunctionType */:
-            case 164 /* ConstructorType */:
+            case 163:
+            case 164:
                 return true;
         }
         return false;
     }
     ts.isFunctionOrConstructorTypeNode = isFunctionOrConstructorTypeNode;
-    // Binding patterns
-    /* @internal */
     function isBindingPattern(node) {
         if (node) {
             var kind = node.kind;
-            return kind === 181 /* ArrayBindingPattern */
-                || kind === 180 /* ObjectBindingPattern */;
+            return kind === 181
+                || kind === 180;
         }
         return false;
     }
     ts.isBindingPattern = isBindingPattern;
-    /* @internal */
     function isAssignmentPattern(node) {
         var kind = node.kind;
-        return kind === 183 /* ArrayLiteralExpression */
-            || kind === 184 /* ObjectLiteralExpression */;
+        return kind === 183
+            || kind === 184;
     }
     ts.isAssignmentPattern = isAssignmentPattern;
-    /* @internal */
     function isArrayBindingElement(node) {
         var kind = node.kind;
-        return kind === 182 /* BindingElement */
-            || kind === 206 /* OmittedExpression */;
+        return kind === 182
+            || kind === 206;
     }
     ts.isArrayBindingElement = isArrayBindingElement;
-    /**
-     * Determines whether the BindingOrAssignmentElement is a BindingElement-like declaration
-     */
-    /* @internal */
     function isDeclarationBindingElement(bindingElement) {
         switch (bindingElement.kind) {
-            case 232 /* VariableDeclaration */:
-            case 149 /* Parameter */:
-            case 182 /* BindingElement */:
+            case 232:
+            case 149:
+            case 182:
                 return true;
         }
         return false;
     }
     ts.isDeclarationBindingElement = isDeclarationBindingElement;
-    /**
-     * Determines whether a node is a BindingOrAssignmentPattern
-     */
-    /* @internal */
     function isBindingOrAssignmentPattern(node) {
         return isObjectBindingOrAssignmentPattern(node)
             || isArrayBindingOrAssignmentPattern(node);
     }
     ts.isBindingOrAssignmentPattern = isBindingOrAssignmentPattern;
-    /**
-     * Determines whether a node is an ObjectBindingOrAssignmentPattern
-     */
-    /* @internal */
     function isObjectBindingOrAssignmentPattern(node) {
         switch (node.kind) {
-            case 180 /* ObjectBindingPattern */:
-            case 184 /* ObjectLiteralExpression */:
+            case 180:
+            case 184:
                 return true;
         }
         return false;
     }
     ts.isObjectBindingOrAssignmentPattern = isObjectBindingOrAssignmentPattern;
-    /**
-     * Determines whether a node is an ArrayBindingOrAssignmentPattern
-     */
-    /* @internal */
     function isArrayBindingOrAssignmentPattern(node) {
         switch (node.kind) {
-            case 181 /* ArrayBindingPattern */:
-            case 183 /* ArrayLiteralExpression */:
+            case 181:
+            case 183:
                 return true;
         }
         return false;
     }
     ts.isArrayBindingOrAssignmentPattern = isArrayBindingOrAssignmentPattern;
-    /* @internal */
     function isPropertyAccessOrQualifiedNameOrImportTypeNode(node) {
         var kind = node.kind;
-        return kind === 185 /* PropertyAccessExpression */
-            || kind === 146 /* QualifiedName */
-            || kind === 179 /* ImportType */;
+        return kind === 185
+            || kind === 146
+            || kind === 179;
     }
     ts.isPropertyAccessOrQualifiedNameOrImportTypeNode = isPropertyAccessOrQualifiedNameOrImportTypeNode;
-    // Expression
     function isPropertyAccessOrQualifiedName(node) {
         var kind = node.kind;
-        return kind === 185 /* PropertyAccessExpression */
-            || kind === 146 /* QualifiedName */;
+        return kind === 185
+            || kind === 146;
     }
     ts.isPropertyAccessOrQualifiedName = isPropertyAccessOrQualifiedName;
     function isCallLikeExpression(node) {
         switch (node.kind) {
-            case 257 /* JsxOpeningElement */:
-            case 256 /* JsxSelfClosingElement */:
-            case 187 /* CallExpression */:
-            case 188 /* NewExpression */:
-            case 189 /* TaggedTemplateExpression */:
-            case 150 /* Decorator */:
+            case 257:
+            case 256:
+            case 187:
+            case 188:
+            case 189:
+            case 150:
                 return true;
             default:
                 return false;
@@ -13198,106 +10441,98 @@ var ts;
     }
     ts.isCallLikeExpression = isCallLikeExpression;
     function isCallOrNewExpression(node) {
-        return node.kind === 187 /* CallExpression */ || node.kind === 188 /* NewExpression */;
+        return node.kind === 187 || node.kind === 188;
     }
     ts.isCallOrNewExpression = isCallOrNewExpression;
     function isTemplateLiteral(node) {
         var kind = node.kind;
-        return kind === 202 /* TemplateExpression */
-            || kind === 13 /* NoSubstitutionTemplateLiteral */;
+        return kind === 202
+            || kind === 13;
     }
     ts.isTemplateLiteral = isTemplateLiteral;
-    /* @internal */
     function isLeftHandSideExpression(node) {
         return isLeftHandSideExpressionKind(ts.skipPartiallyEmittedExpressions(node).kind);
     }
     ts.isLeftHandSideExpression = isLeftHandSideExpression;
     function isLeftHandSideExpressionKind(kind) {
         switch (kind) {
-            case 185 /* PropertyAccessExpression */:
-            case 186 /* ElementAccessExpression */:
-            case 188 /* NewExpression */:
-            case 187 /* CallExpression */:
-            case 255 /* JsxElement */:
-            case 256 /* JsxSelfClosingElement */:
-            case 259 /* JsxFragment */:
-            case 189 /* TaggedTemplateExpression */:
-            case 183 /* ArrayLiteralExpression */:
-            case 191 /* ParenthesizedExpression */:
-            case 184 /* ObjectLiteralExpression */:
-            case 205 /* ClassExpression */:
-            case 192 /* FunctionExpression */:
-            case 71 /* Identifier */:
-            case 12 /* RegularExpressionLiteral */:
-            case 8 /* NumericLiteral */:
-            case 9 /* StringLiteral */:
-            case 13 /* NoSubstitutionTemplateLiteral */:
-            case 202 /* TemplateExpression */:
-            case 86 /* FalseKeyword */:
-            case 95 /* NullKeyword */:
-            case 99 /* ThisKeyword */:
-            case 101 /* TrueKeyword */:
-            case 97 /* SuperKeyword */:
-            case 209 /* NonNullExpression */:
-            case 210 /* MetaProperty */:
-            case 91 /* ImportKeyword */: // technically this is only an Expression if it's in a CallExpression
+            case 185:
+            case 186:
+            case 188:
+            case 187:
+            case 255:
+            case 256:
+            case 259:
+            case 189:
+            case 183:
+            case 191:
+            case 184:
+            case 205:
+            case 192:
+            case 71:
+            case 12:
+            case 8:
+            case 9:
+            case 13:
+            case 202:
+            case 86:
+            case 95:
+            case 99:
+            case 101:
+            case 97:
+            case 209:
+            case 210:
+            case 91:
                 return true;
             default:
                 return false;
         }
     }
-    /* @internal */
     function isUnaryExpression(node) {
         return isUnaryExpressionKind(ts.skipPartiallyEmittedExpressions(node).kind);
     }
     ts.isUnaryExpression = isUnaryExpression;
     function isUnaryExpressionKind(kind) {
         switch (kind) {
-            case 198 /* PrefixUnaryExpression */:
-            case 199 /* PostfixUnaryExpression */:
-            case 194 /* DeleteExpression */:
-            case 195 /* TypeOfExpression */:
-            case 196 /* VoidExpression */:
-            case 197 /* AwaitExpression */:
-            case 190 /* TypeAssertionExpression */:
+            case 198:
+            case 199:
+            case 194:
+            case 195:
+            case 196:
+            case 197:
+            case 190:
                 return true;
             default:
                 return isLeftHandSideExpressionKind(kind);
         }
     }
-    /* @internal */
     function isUnaryExpressionWithWrite(expr) {
         switch (expr.kind) {
-            case 199 /* PostfixUnaryExpression */:
+            case 199:
                 return true;
-            case 198 /* PrefixUnaryExpression */:
-                return expr.operator === 43 /* PlusPlusToken */ ||
-                    expr.operator === 44 /* MinusMinusToken */;
+            case 198:
+                return expr.operator === 43 ||
+                    expr.operator === 44;
             default:
                 return false;
         }
     }
     ts.isUnaryExpressionWithWrite = isUnaryExpressionWithWrite;
-    /* @internal */
-    /**
-     * Determines whether a node is an expression based only on its kind.
-     * Use `isExpressionNode` if not in transforms.
-     */
     function isExpression(node) {
         return isExpressionKind(ts.skipPartiallyEmittedExpressions(node).kind);
     }
     ts.isExpression = isExpression;
     function isExpressionKind(kind) {
         switch (kind) {
-            case 201 /* ConditionalExpression */:
-            case 203 /* YieldExpression */:
-            case 193 /* ArrowFunction */:
-            case 200 /* BinaryExpression */:
-            case 204 /* SpreadElement */:
-            case 208 /* AsExpression */:
-            case 206 /* OmittedExpression */:
-            case 302 /* CommaListExpression */:
-            case 301 /* PartiallyEmittedExpression */:
+            case 201:
+            case 203:
+            case 193:
+            case 200:
+            case 204:
+            case 208:
+            case 206:
+            case 302:
+            case 301:
                 return true;
             default:
                 return isUnaryExpressionKind(kind);
@@ -13305,21 +10540,18 @@ var ts;
     }
     function isAssertionExpression(node) {
         var kind = node.kind;
-        return kind === 190 /* TypeAssertionExpression */
-            || kind === 208 /* AsExpression */;
+        return kind === 190
+            || kind === 208;
     }
     ts.isAssertionExpression = isAssertionExpression;
-    /* @internal */
     function isPartiallyEmittedExpression(node) {
-        return node.kind === 301 /* PartiallyEmittedExpression */;
+        return node.kind === 301;
     }
     ts.isPartiallyEmittedExpression = isPartiallyEmittedExpression;
-    /* @internal */
     function isNotEmittedStatement(node) {
-        return node.kind === 300 /* NotEmittedStatement */;
+        return node.kind === 300;
     }
     ts.isNotEmittedStatement = isNotEmittedStatement;
-    /* @internal */
     function isNotEmittedOrPartiallyEmittedNode(node) {
         return isNotEmittedStatement(node)
             || isPartiallyEmittedExpression(node);
@@ -13327,169 +10559,152 @@ var ts;
     ts.isNotEmittedOrPartiallyEmittedNode = isNotEmittedOrPartiallyEmittedNode;
     function isIterationStatement(node, lookInLabeledStatements) {
         switch (node.kind) {
-            case 220 /* ForStatement */:
-            case 221 /* ForInStatement */:
-            case 222 /* ForOfStatement */:
-            case 218 /* DoStatement */:
-            case 219 /* WhileStatement */:
+            case 220:
+            case 221:
+            case 222:
+            case 218:
+            case 219:
                 return true;
-            case 228 /* LabeledStatement */:
+            case 228:
                 return lookInLabeledStatements && isIterationStatement(node.statement, lookInLabeledStatements);
         }
         return false;
     }
     ts.isIterationStatement = isIterationStatement;
-    /* @internal */
     function isForInOrOfStatement(node) {
-        return node.kind === 221 /* ForInStatement */ || node.kind === 222 /* ForOfStatement */;
+        return node.kind === 221 || node.kind === 222;
     }
     ts.isForInOrOfStatement = isForInOrOfStatement;
-    // Element
-    /* @internal */
     function isConciseBody(node) {
         return ts.isBlock(node)
             || isExpression(node);
     }
     ts.isConciseBody = isConciseBody;
-    /* @internal */
     function isFunctionBody(node) {
         return ts.isBlock(node);
     }
     ts.isFunctionBody = isFunctionBody;
-    /* @internal */
     function isForInitializer(node) {
         return ts.isVariableDeclarationList(node)
             || isExpression(node);
     }
     ts.isForInitializer = isForInitializer;
-    /* @internal */
     function isModuleBody(node) {
         var kind = node.kind;
-        return kind === 240 /* ModuleBlock */
-            || kind === 239 /* ModuleDeclaration */
-            || kind === 71 /* Identifier */;
+        return kind === 240
+            || kind === 239
+            || kind === 71;
     }
     ts.isModuleBody = isModuleBody;
-    /* @internal */
     function isNamespaceBody(node) {
         var kind = node.kind;
-        return kind === 240 /* ModuleBlock */
-            || kind === 239 /* ModuleDeclaration */;
+        return kind === 240
+            || kind === 239;
     }
     ts.isNamespaceBody = isNamespaceBody;
-    /* @internal */
     function isJSDocNamespaceBody(node) {
         var kind = node.kind;
-        return kind === 71 /* Identifier */
-            || kind === 239 /* ModuleDeclaration */;
+        return kind === 71
+            || kind === 239;
     }
     ts.isJSDocNamespaceBody = isJSDocNamespaceBody;
-    /* @internal */
     function isNamedImportBindings(node) {
         var kind = node.kind;
-        return kind === 247 /* NamedImports */
-            || kind === 246 /* NamespaceImport */;
+        return kind === 247
+            || kind === 246;
     }
     ts.isNamedImportBindings = isNamedImportBindings;
-    /* @internal */
     function isModuleOrEnumDeclaration(node) {
-        return node.kind === 239 /* ModuleDeclaration */ || node.kind === 238 /* EnumDeclaration */;
+        return node.kind === 239 || node.kind === 238;
     }
     ts.isModuleOrEnumDeclaration = isModuleOrEnumDeclaration;
     function isDeclarationKind(kind) {
-        return kind === 193 /* ArrowFunction */
-            || kind === 182 /* BindingElement */
-            || kind === 235 /* ClassDeclaration */
-            || kind === 205 /* ClassExpression */
-            || kind === 155 /* Constructor */
-            || kind === 238 /* EnumDeclaration */
-            || kind === 273 /* EnumMember */
-            || kind === 252 /* ExportSpecifier */
-            || kind === 234 /* FunctionDeclaration */
-            || kind === 192 /* FunctionExpression */
-            || kind === 156 /* GetAccessor */
-            || kind === 245 /* ImportClause */
-            || kind === 243 /* ImportEqualsDeclaration */
-            || kind === 248 /* ImportSpecifier */
-            || kind === 236 /* InterfaceDeclaration */
-            || kind === 262 /* JsxAttribute */
-            || kind === 154 /* MethodDeclaration */
-            || kind === 153 /* MethodSignature */
-            || kind === 239 /* ModuleDeclaration */
-            || kind === 242 /* NamespaceExportDeclaration */
-            || kind === 246 /* NamespaceImport */
-            || kind === 149 /* Parameter */
-            || kind === 270 /* PropertyAssignment */
-            || kind === 152 /* PropertyDeclaration */
-            || kind === 151 /* PropertySignature */
-            || kind === 157 /* SetAccessor */
-            || kind === 271 /* ShorthandPropertyAssignment */
-            || kind === 237 /* TypeAliasDeclaration */
-            || kind === 148 /* TypeParameter */
-            || kind === 232 /* VariableDeclaration */
-            || kind === 297 /* JSDocTypedefTag */
-            || kind === 292 /* JSDocCallbackTag */
-            || kind === 298 /* JSDocPropertyTag */;
+        return kind === 193
+            || kind === 182
+            || kind === 235
+            || kind === 205
+            || kind === 155
+            || kind === 238
+            || kind === 273
+            || kind === 252
+            || kind === 234
+            || kind === 192
+            || kind === 156
+            || kind === 245
+            || kind === 243
+            || kind === 248
+            || kind === 236
+            || kind === 262
+            || kind === 154
+            || kind === 153
+            || kind === 239
+            || kind === 242
+            || kind === 246
+            || kind === 149
+            || kind === 270
+            || kind === 152
+            || kind === 151
+            || kind === 157
+            || kind === 271
+            || kind === 237
+            || kind === 148
+            || kind === 232
+            || kind === 297
+            || kind === 292
+            || kind === 298;
     }
     function isDeclarationStatementKind(kind) {
-        return kind === 234 /* FunctionDeclaration */
-            || kind === 253 /* MissingDeclaration */
-            || kind === 235 /* ClassDeclaration */
-            || kind === 236 /* InterfaceDeclaration */
-            || kind === 237 /* TypeAliasDeclaration */
-            || kind === 238 /* EnumDeclaration */
-            || kind === 239 /* ModuleDeclaration */
-            || kind === 244 /* ImportDeclaration */
-            || kind === 243 /* ImportEqualsDeclaration */
-            || kind === 250 /* ExportDeclaration */
-            || kind === 249 /* ExportAssignment */
-            || kind === 242 /* NamespaceExportDeclaration */;
+        return kind === 234
+            || kind === 253
+            || kind === 235
+            || kind === 236
+            || kind === 237
+            || kind === 238
+            || kind === 239
+            || kind === 244
+            || kind === 243
+            || kind === 250
+            || kind === 249
+            || kind === 242;
     }
     function isStatementKindButNotDeclarationKind(kind) {
-        return kind === 224 /* BreakStatement */
-            || kind === 223 /* ContinueStatement */
-            || kind === 231 /* DebuggerStatement */
-            || kind === 218 /* DoStatement */
-            || kind === 216 /* ExpressionStatement */
-            || kind === 215 /* EmptyStatement */
-            || kind === 221 /* ForInStatement */
-            || kind === 222 /* ForOfStatement */
-            || kind === 220 /* ForStatement */
-            || kind === 217 /* IfStatement */
-            || kind === 228 /* LabeledStatement */
-            || kind === 225 /* ReturnStatement */
-            || kind === 227 /* SwitchStatement */
-            || kind === 229 /* ThrowStatement */
-            || kind === 230 /* TryStatement */
-            || kind === 214 /* VariableStatement */
-            || kind === 219 /* WhileStatement */
-            || kind === 226 /* WithStatement */
-            || kind === 300 /* NotEmittedStatement */
-            || kind === 304 /* EndOfDeclarationMarker */
-            || kind === 303 /* MergeDeclarationMarker */;
-    }
-    /* @internal */
+        return kind === 224
+            || kind === 223
+            || kind === 231
+            || kind === 218
+            || kind === 216
+            || kind === 215
+            || kind === 221
+            || kind === 222
+            || kind === 220
+            || kind === 217
+            || kind === 228
+            || kind === 225
+            || kind === 227
+            || kind === 229
+            || kind === 230
+            || kind === 214
+            || kind === 219
+            || kind === 226
+            || kind === 300
+            || kind === 304
+            || kind === 303;
+    }
     function isDeclaration(node) {
-        if (node.kind === 148 /* TypeParameter */) {
-            return node.parent.kind !== 296 /* JSDocTemplateTag */ || ts.isInJavaScriptFile(node);
+        if (node.kind === 148) {
+            return node.parent.kind !== 296 || ts.isInJavaScriptFile(node);
         }
         return isDeclarationKind(node.kind);
     }
     ts.isDeclaration = isDeclaration;
-    /* @internal */
     function isDeclarationStatement(node) {
         return isDeclarationStatementKind(node.kind);
     }
     ts.isDeclarationStatement = isDeclarationStatement;
-    /**
-     * Determines whether the node is a statement that is not also a declaration
-     */
-    /* @internal */
     function isStatementButNotDeclaration(node) {
         return isStatementKindButNotDeclarationKind(node.kind);
     }
     ts.isStatementButNotDeclaration = isStatementButNotDeclaration;
-    /* @internal */
     function isStatement(node) {
         var kind = node.kind;
         return isStatementKindButNotDeclarationKind(kind)
@@ -13498,183 +10713,156 @@ var ts;
     }
     ts.isStatement = isStatement;
     function isBlockStatement(node) {
-        if (node.kind !== 213 /* Block */)
+        if (node.kind !== 213)
             return false;
         if (node.parent !== undefined) {
-            if (node.parent.kind === 230 /* TryStatement */ || node.parent.kind === 269 /* CatchClause */) {
+            if (node.parent.kind === 230 || node.parent.kind === 269) {
                 return false;
             }
         }
         return !ts.isFunctionBlock(node);
     }
-    // Module references
-    /* @internal */
     function isModuleReference(node) {
         var kind = node.kind;
-        return kind === 254 /* ExternalModuleReference */
-            || kind === 146 /* QualifiedName */
-            || kind === 71 /* Identifier */;
+        return kind === 254
+            || kind === 146
+            || kind === 71;
     }
     ts.isModuleReference = isModuleReference;
-    // JSX
-    /* @internal */
     function isJsxTagNameExpression(node) {
         var kind = node.kind;
-        return kind === 99 /* ThisKeyword */
-            || kind === 71 /* Identifier */
-            || kind === 185 /* PropertyAccessExpression */;
+        return kind === 99
+            || kind === 71
+            || kind === 185;
     }
     ts.isJsxTagNameExpression = isJsxTagNameExpression;
-    /* @internal */
     function isJsxChild(node) {
         var kind = node.kind;
-        return kind === 255 /* JsxElement */
-            || kind === 265 /* JsxExpression */
-            || kind === 256 /* JsxSelfClosingElement */
-            || kind === 10 /* JsxText */
-            || kind === 259 /* JsxFragment */;
+        return kind === 255
+            || kind === 265
+            || kind === 256
+            || kind === 10
+            || kind === 259;
     }
     ts.isJsxChild = isJsxChild;
-    /* @internal */
     function isJsxAttributeLike(node) {
         var kind = node.kind;
-        return kind === 262 /* JsxAttribute */
-            || kind === 264 /* JsxSpreadAttribute */;
+        return kind === 262
+            || kind === 264;
     }
     ts.isJsxAttributeLike = isJsxAttributeLike;
-    /* @internal */
     function isStringLiteralOrJsxExpression(node) {
         var kind = node.kind;
-        return kind === 9 /* StringLiteral */
-            || kind === 265 /* JsxExpression */;
+        return kind === 9
+            || kind === 265;
     }
     ts.isStringLiteralOrJsxExpression = isStringLiteralOrJsxExpression;
     function isJsxOpeningLikeElement(node) {
         var kind = node.kind;
-        return kind === 257 /* JsxOpeningElement */
-            || kind === 256 /* JsxSelfClosingElement */;
+        return kind === 257
+            || kind === 256;
     }
     ts.isJsxOpeningLikeElement = isJsxOpeningLikeElement;
-    // Clauses
     function isCaseOrDefaultClause(node) {
         var kind = node.kind;
-        return kind === 266 /* CaseClause */
-            || kind === 267 /* DefaultClause */;
+        return kind === 266
+            || kind === 267;
     }
     ts.isCaseOrDefaultClause = isCaseOrDefaultClause;
-    // JSDoc
-    /** True if node is of some JSDoc syntax kind. */
-    /* @internal */
     function isJSDocNode(node) {
-        return node.kind >= 278 /* FirstJSDocNode */ && node.kind <= 298 /* LastJSDocNode */;
+        return node.kind >= 278 && node.kind <= 298;
     }
     ts.isJSDocNode = isJSDocNode;
-    /** True if node is of a kind that may contain comment text. */
     function isJSDocCommentContainingNode(node) {
-        return node.kind === 286 /* JSDocComment */ || isJSDocTag(node) || ts.isJSDocTypeLiteral(node) || ts.isJSDocSignature(node);
+        return node.kind === 286 || isJSDocTag(node) || ts.isJSDocTypeLiteral(node) || ts.isJSDocSignature(node);
     }
     ts.isJSDocCommentContainingNode = isJSDocCommentContainingNode;
-    // TODO: determine what this does before making it public.
-    /* @internal */
     function isJSDocTag(node) {
-        return node.kind >= 289 /* FirstJSDocTagNode */ && node.kind <= 298 /* LastJSDocTagNode */;
+        return node.kind >= 289 && node.kind <= 298;
     }
     ts.isJSDocTag = isJSDocTag;
     function isSetAccessor(node) {
-        return node.kind === 157 /* SetAccessor */;
+        return node.kind === 157;
     }
     ts.isSetAccessor = isSetAccessor;
     function isGetAccessor(node) {
-        return node.kind === 156 /* GetAccessor */;
+        return node.kind === 156;
     }
     ts.isGetAccessor = isGetAccessor;
-    /** True if has jsdoc nodes attached to it. */
-    /* @internal */
-    // TODO: GH#19856 Would like to return `node is Node & { jsDoc: JSDoc[] }` but it causes long compile times
     function hasJSDocNodes(node) {
         var jsDoc = node.jsDoc;
         return !!jsDoc && jsDoc.length > 0;
     }
     ts.hasJSDocNodes = hasJSDocNodes;
-    /** True if has type node attached to it. */
-    /* @internal */
     function hasType(node) {
         return !!node.type;
     }
     ts.hasType = hasType;
-    /* True if the node could have a type node a `.type` */
-    /* @internal */
     function couldHaveType(node) {
         switch (node.kind) {
-            case 149 /* Parameter */:
-            case 151 /* PropertySignature */:
-            case 152 /* PropertyDeclaration */:
-            case 153 /* MethodSignature */:
-            case 154 /* MethodDeclaration */:
-            case 155 /* Constructor */:
-            case 156 /* GetAccessor */:
-            case 157 /* SetAccessor */:
-            case 158 /* CallSignature */:
-            case 159 /* ConstructSignature */:
-            case 160 /* IndexSignature */:
-            case 161 /* TypePredicate */:
-            case 163 /* FunctionType */:
-            case 164 /* ConstructorType */:
-            case 173 /* ParenthesizedType */:
-            case 175 /* TypeOperator */:
-            case 177 /* MappedType */:
-            case 190 /* TypeAssertionExpression */:
-            case 192 /* FunctionExpression */:
-            case 193 /* ArrowFunction */:
-            case 208 /* AsExpression */:
-            case 232 /* VariableDeclaration */:
-            case 234 /* FunctionDeclaration */:
-            case 237 /* TypeAliasDeclaration */:
-            case 278 /* JSDocTypeExpression */:
-            case 281 /* JSDocNullableType */:
-            case 282 /* JSDocNonNullableType */:
-            case 283 /* JSDocOptionalType */:
-            case 284 /* JSDocFunctionType */:
-            case 285 /* JSDocVariadicType */:
+            case 149:
+            case 151:
+            case 152:
+            case 153:
+            case 154:
+            case 155:
+            case 156:
+            case 157:
+            case 158:
+            case 159:
+            case 160:
+            case 161:
+            case 163:
+            case 164:
+            case 173:
+            case 175:
+            case 177:
+            case 190:
+            case 192:
+            case 193:
+            case 208:
+            case 232:
+            case 234:
+            case 237:
+            case 278:
+            case 281:
+            case 282:
+            case 283:
+            case 284:
+            case 285:
                 return true;
         }
         return false;
     }
     ts.couldHaveType = couldHaveType;
-    /** True if has initializer node attached to it. */
-    /* @internal */
     function hasInitializer(node) {
         return !!node.initializer;
     }
     ts.hasInitializer = hasInitializer;
-    /** True if has initializer node attached to it. */
-    /* @internal */
     function hasOnlyExpressionInitializer(node) {
         return hasInitializer(node) && !ts.isForStatement(node) && !ts.isForInStatement(node) && !ts.isForOfStatement(node) && !ts.isJsxAttribute(node);
     }
     ts.hasOnlyExpressionInitializer = hasOnlyExpressionInitializer;
     function isObjectLiteralElement(node) {
         switch (node.kind) {
-            case 262 /* JsxAttribute */:
-            case 264 /* JsxSpreadAttribute */:
-            case 270 /* PropertyAssignment */:
-            case 271 /* ShorthandPropertyAssignment */:
-            case 154 /* MethodDeclaration */:
-            case 156 /* GetAccessor */:
-            case 157 /* SetAccessor */:
+            case 262:
+            case 264:
+            case 270:
+            case 271:
+            case 154:
+            case 156:
+            case 157:
                 return true;
             default:
                 return false;
         }
     }
     ts.isObjectLiteralElement = isObjectLiteralElement;
-    /* @internal */
     function isTypeReferenceType(node) {
-        return node.kind === 162 /* TypeReference */ || node.kind === 207 /* ExpressionWithTypeArguments */;
+        return node.kind === 162 || node.kind === 207;
     }
     ts.isTypeReferenceType = isTypeReferenceType;
     var MAX_SMI_X86 = 1073741823;
-    /* @internal */
     function guessIndentation(lines) {
         var indentation = MAX_SMI_X86;
         for (var _i = 0, lines_1 = lines; _i < lines_1.length; _i++) {
@@ -13699,12 +10887,13 @@ var ts;
     }
     ts.guessIndentation = guessIndentation;
     function isStringLiteralLike(node) {
-        return node.kind === 9 /* StringLiteral */ || node.kind === 13 /* NoSubstitutionTemplateLiteral */;
+        return node.kind === 9 || node.kind === 13;
     }
     ts.isStringLiteralLike = isStringLiteralLike;
-    /** @internal */
+})(ts || (ts = {}));
+(function (ts) {
     function isNamedImportsOrExports(node) {
-        return node.kind === 247 /* NamedImports */ || node.kind === 251 /* NamedExports */;
+        return node.kind === 247 || node.kind === 251;
     }
     ts.isNamedImportsOrExports = isNamedImportsOrExports;
     function Symbol(flags, name) {
@@ -13718,19 +10907,19 @@ var ts;
     }
     function Type(checker, flags) {
         this.flags = flags;
-        if (Debug.isDebugging) {
+        if (ts.Debug.isDebugging) {
             this.checker = checker;
         }
     }
-    function Signature() { } // tslint:disable-line no-empty
+    function Signature() { }
     function Node(kind, pos, end) {
         this.pos = pos;
         this.end = end;
         this.kind = kind;
         this.id = 0;
-        this.flags = 0 /* None */;
-        this.modifierFlagsCache = 0 /* None */;
-        this.transformFlags = 0 /* None */;
+        this.flags = 0;
+        this.modifierFlagsCache = 0;
+        this.transformFlags = 0;
         this.parent = undefined;
         this.original = undefined;
     }
@@ -13751,7 +10940,7 @@ var ts;
     };
     function formatStringFromArgs(text, args, baseIndex) {
         if (baseIndex === void 0) { baseIndex = 0; }
-        return text.replace(/{(\d+)}/g, function (_match, index) { return Debug.assertDefined(args[+index + baseIndex]); });
+        return text.replace(/{(\d+)}/g, function (_match, index) { return ts.Debug.assertDefined(args[+index + baseIndex]); });
     }
     ts.formatStringFromArgs = formatStringFromArgs;
     function getLocaleSpecificMessage(message) {
@@ -13759,11 +10948,11 @@ var ts;
     }
     ts.getLocaleSpecificMessage = getLocaleSpecificMessage;
     function createFileDiagnostic(file, start, length, message) {
-        Debug.assertGreaterThanOrEqual(start, 0);
-        Debug.assertGreaterThanOrEqual(length, 0);
+        ts.Debug.assertGreaterThanOrEqual(start, 0);
+        ts.Debug.assertGreaterThanOrEqual(length, 0);
         if (file) {
-            Debug.assertLessThanOrEqual(start, file.text.length);
-            Debug.assertLessThanOrEqual(start + length, file.text.length);
+            ts.Debug.assertLessThanOrEqual(start, file.text.length);
+            ts.Debug.assertLessThanOrEqual(start + length, file.text.length);
         }
         var text = getLocaleSpecificMessage(message);
         if (arguments.length > 4) {
@@ -13780,7 +10969,6 @@ var ts;
         };
     }
     ts.createFileDiagnostic = createFileDiagnostic;
-    /* @internal */
     function formatMessage(_dummy, message) {
         var text = getLocaleSpecificMessage(message);
         if (arguments.length > 2) {
@@ -13847,14 +11035,13 @@ var ts;
             ts.compareValues(d1.length, d2.length) ||
             ts.compareValues(d1.code, d2.code) ||
             compareMessageText(d1.messageText, d2.messageText) ||
-            0 /* EqualTo */;
+            0;
     }
     ts.compareDiagnostics = compareDiagnostics;
     function compareMessageText(t1, t2) {
         var text1 = t1;
         var text2 = t2;
         while (text1 && text2) {
-            // We still have both chains.
             var string1 = ts.isString(text1) ? text1 : text1.messageText;
             var string2 = ts.isString(text2) ? text2 : text2.messageText;
             var res = ts.compareStringsCaseSensitive(string1, string2);
@@ -13865,20 +11052,18 @@ var ts;
             text2 = ts.isString(text2) ? undefined : text2.next;
         }
         if (!text1 && !text2) {
-            // if the chains are done, then these messages are the same.
-            return 0 /* EqualTo */;
+            return 0;
         }
-        // We still have one chain remaining.  The shorter chain should come first.
-        return text1 ? 1 /* GreaterThan */ : -1 /* LessThan */;
+        return text1 ? 1 : -1;
     }
     function getEmitScriptTarget(compilerOptions) {
-        return compilerOptions.target || 0 /* ES3 */;
+        return compilerOptions.target || 0;
     }
     ts.getEmitScriptTarget = getEmitScriptTarget;
     function getEmitModuleKind(compilerOptions) {
         return typeof compilerOptions.module === "number" ?
             compilerOptions.module :
-            getEmitScriptTarget(compilerOptions) >= 2 /* ES2015 */ ? ts.ModuleKind.ES2015 : ts.ModuleKind.CommonJS;
+            getEmitScriptTarget(compilerOptions) >= 2 ? ts.ModuleKind.ES2015 : ts.ModuleKind.CommonJS;
     }
     ts.getEmitModuleKind = getEmitModuleKind;
     function getEmitModuleResolutionKind(compilerOptions) {
@@ -13921,12 +11106,11 @@ var ts;
     function hasZeroOrOneAsteriskCharacter(str) {
         var seenAsterisk = false;
         for (var i = 0; i < str.length; i++) {
-            if (str.charCodeAt(i) === 42 /* asterisk */) {
+            if (str.charCodeAt(i) === 42) {
                 if (!seenAsterisk) {
                     seenAsterisk = true;
                 }
                 else {
-                    // have already seen asterisk
                     return false;
                 }
             }
@@ -13934,128 +11118,80 @@ var ts;
         return true;
     }
     ts.hasZeroOrOneAsteriskCharacter = hasZeroOrOneAsteriskCharacter;
-    /**
-     * Internally, we represent paths as strings with '/' as the directory separator.
-     * When we make system calls (eg: LanguageServiceHost.getDirectory()),
-     * we expect the host to correctly handle paths in our specified format.
-     */
     ts.directorySeparator = "/";
     var altDirectorySeparator = "\\";
     var urlSchemeSeparator = "://";
     var backslashRegExp = /\\/g;
-    /**
-     * Normalize path separators.
-     */
     function normalizeSlashes(path) {
         return path.replace(backslashRegExp, ts.directorySeparator);
     }
     ts.normalizeSlashes = normalizeSlashes;
     function isVolumeCharacter(charCode) {
-        return (charCode >= 97 /* a */ && charCode <= 122 /* z */) ||
-            (charCode >= 65 /* A */ && charCode <= 90 /* Z */);
+        return (charCode >= 97 && charCode <= 122) ||
+            (charCode >= 65 && charCode <= 90);
     }
     function getFileUrlVolumeSeparatorEnd(url, start) {
         var ch0 = url.charCodeAt(start);
-        if (ch0 === 58 /* colon */)
+        if (ch0 === 58)
             return start + 1;
-        if (ch0 === 37 /* percent */ && url.charCodeAt(start + 1) === 51 /* _3 */) {
+        if (ch0 === 37 && url.charCodeAt(start + 1) === 51) {
             var ch2 = url.charCodeAt(start + 2);
-            if (ch2 === 97 /* a */ || ch2 === 65 /* A */)
+            if (ch2 === 97 || ch2 === 65)
                 return start + 3;
         }
         return -1;
     }
-    /**
-     * Returns length of the root part of a path or URL (i.e. length of "/", "x:/", "//server/share/, file:///user/files").
-     * If the root is part of a URL, the twos-complement of the root length is returned.
-     */
     function getEncodedRootLength(path) {
         if (!path)
             return 0;
         var ch0 = path.charCodeAt(0);
-        // POSIX or UNC
-        if (ch0 === 47 /* slash */ || ch0 === 92 /* backslash */) {
+        if (ch0 === 47 || ch0 === 92) {
             if (path.charCodeAt(1) !== ch0)
-                return 1; // POSIX: "/" (or non-normalized "\")
-            var p1 = path.indexOf(ch0 === 47 /* slash */ ? ts.directorySeparator : altDirectorySeparator, 2);
+                return 1;
+            var p1 = path.indexOf(ch0 === 47 ? ts.directorySeparator : altDirectorySeparator, 2);
             if (p1 < 0)
-                return path.length; // UNC: "//server" or "\\server"
-            return p1 + 1; // UNC: "//server/" or "\\server\"
+                return path.length;
+            return p1 + 1;
         }
-        // DOS
-        if (isVolumeCharacter(ch0) && path.charCodeAt(1) === 58 /* colon */) {
+        if (isVolumeCharacter(ch0) && path.charCodeAt(1) === 58) {
             var ch2 = path.charCodeAt(2);
-            if (ch2 === 47 /* slash */ || ch2 === 92 /* backslash */)
-                return 3; // DOS: "c:/" or "c:\"
+            if (ch2 === 47 || ch2 === 92)
+                return 3;
             if (path.length === 2)
-                return 2; // DOS: "c:" (but not "c:d")
+                return 2;
         }
-        // URL
         var schemeEnd = path.indexOf(urlSchemeSeparator);
         if (schemeEnd !== -1) {
             var authorityStart = schemeEnd + urlSchemeSeparator.length;
             var authorityEnd = path.indexOf(ts.directorySeparator, authorityStart);
-            if (authorityEnd !== -1) { // URL: "file:///", "file://server/", "file://server/path"
-                // For local "file" URLs, include the leading DOS volume (if present).
-                // Per https://www.ietf.org/rfc/rfc1738.txt, a host of "" or "localhost" is a
-                // special case interpreted as "the machine from which the URL is being interpreted".
+            if (authorityEnd !== -1) {
                 var scheme = path.slice(0, schemeEnd);
                 var authority = path.slice(authorityStart, authorityEnd);
                 if (scheme === "file" && (authority === "" || authority === "localhost") &&
                     isVolumeCharacter(path.charCodeAt(authorityEnd + 1))) {
                     var volumeSeparatorEnd = getFileUrlVolumeSeparatorEnd(path, authorityEnd + 2);
                     if (volumeSeparatorEnd !== -1) {
-                        if (path.charCodeAt(volumeSeparatorEnd) === 47 /* slash */) {
-                            // URL: "file:///c:/", "file://localhost/c:/", "file:///c%3a/", "file://localhost/c%3a/"
+                        if (path.charCodeAt(volumeSeparatorEnd) === 47) {
                             return ~(volumeSeparatorEnd + 1);
                         }
                         if (volumeSeparatorEnd === path.length) {
-                            // URL: "file:///c:", "file://localhost/c:", "file:///c$3a", "file://localhost/c%3a"
-                            // but not "file:///c:d" or "file:///c%3ad"
                             return ~volumeSeparatorEnd;
                         }
                     }
                 }
-                return ~(authorityEnd + 1); // URL: "file://server/", "http://server/"
+                return ~(authorityEnd + 1);
             }
-            return ~path.length; // URL: "file://server", "http://server"
+            return ~path.length;
         }
-        // relative
         return 0;
     }
-    /**
-     * Returns length of the root part of a path or URL (i.e. length of "/", "x:/", "//server/share/, file:///user/files").
-     *
-     * For example:
-     * ```ts
-     * getRootLength("a") === 0                   // ""
-     * getRootLength("/") === 1                   // "/"
-     * getRootLength("c:") === 2                  // "c:"
-     * getRootLength("c:d") === 0                 // ""
-     * getRootLength("c:/") === 3                 // "c:/"
-     * getRootLength("c:\\") === 3                // "c:\\"
-     * getRootLength("//server") === 7            // "//server"
-     * getRootLength("//server/share") === 8      // "//server/"
-     * getRootLength("\\\\server") === 7          // "\\\\server"
-     * getRootLength("\\\\server\\share") === 8   // "\\\\server\\"
-     * getRootLength("file:///path") === 8        // "file:///"
-     * getRootLength("file:///c:") === 10         // "file:///c:"
-     * getRootLength("file:///c:d") === 8         // "file:///"
-     * getRootLength("file:///c:/path") === 11    // "file:///c:/"
-     * getRootLength("file://server") === 13      // "file://server"
-     * getRootLength("file://server/path") === 14 // "file://server/"
-     * getRootLength("http://server") === 13      // "http://server"
-     * getRootLength("http://server/path") === 14 // "http://server/"
-     * ```
-     */
     function getRootLength(path) {
         var rootLength = getEncodedRootLength(path);
         return rootLength < 0 ? ~rootLength : rootLength;
     }
     ts.getRootLength = getRootLength;
-    // TODO(rbuckton): replace references with `resolvePath`
     function normalizePath(path) {
-        return resolvePath(path);
+        return ts.resolvePath(path);
     }
     ts.normalizePath = normalizePath;
     function normalizePathAndParts(path) {
@@ -14063,7 +11199,7 @@ var ts;
         var _a = reducePathComponents(getPathComponents(path)), root = _a[0], parts = _a.slice(1);
         if (parts.length) {
             var joinedParts = root + parts.join(ts.directorySeparator);
-            return { path: hasTrailingDirectorySeparator(path) ? ensureTrailingDirectorySeparator(joinedParts) : joinedParts, parts: parts };
+            return { path: ts.hasTrailingDirectorySeparator(path) ? ts.ensureTrailingDirectorySeparator(joinedParts) : joinedParts, parts: parts };
         }
         else {
             return { path: root, parts: parts };
@@ -14072,13 +11208,10 @@ var ts;
     ts.normalizePathAndParts = normalizePathAndParts;
     function getDirectoryPath(path) {
         path = normalizeSlashes(path);
-        // If the path provided is itself the root, then return it.
         var rootLength = getRootLength(path);
         if (rootLength === path.length)
             return path;
-        // return the leading portion of the path up to the last (non-terminal) directory separator
-        // but not including any trailing directory separator.
-        path = removeTrailingDirectorySeparator(path);
+        path = ts.removeTrailingDirectorySeparator(path);
         return path.slice(0, Math.max(rootLength, path.lastIndexOf(ts.directorySeparator)));
     }
     ts.getDirectoryPath = getDirectoryPath;
@@ -14090,17 +11223,10 @@ var ts;
         return /^\.\.?($|[\\/])/.test(path);
     }
     ts.pathIsRelative = pathIsRelative;
-    /**
-     * Determines whether a path is an absolute path (e.g. starts with `/`, or a dos path
-     * like `c:`, `c:\` or `c:/`).
-     */
     function isRootedDiskPath(path) {
         return getEncodedRootLength(path) > 0;
     }
     ts.isRootedDiskPath = isRootedDiskPath;
-    /**
-     * Determines whether a path consists only of a path root.
-     */
     function isDiskPathRoot(path) {
         var rootLength = getEncodedRootLength(path);
         return rootLength > 0 && rootLength === path.length;
@@ -14109,7 +11235,7 @@ var ts;
     function convertToRelativePath(absoluteOrRelativePath, basePath, getCanonicalFileName) {
         return !isRootedDiskPath(absoluteOrRelativePath)
             ? absoluteOrRelativePath
-            : getRelativePathToDirectoryOrUrl(basePath, absoluteOrRelativePath, basePath, getCanonicalFileName, /*isAbsolutePathAnUrl*/ false);
+            : ts.getRelativePathToDirectoryOrUrl(basePath, absoluteOrRelativePath, basePath, getCanonicalFileName, false);
     }
     ts.convertToRelativePath = convertToRelativePath;
     function pathComponents(path, rootLength) {
@@ -14119,23 +11245,13 @@ var ts;
             rest.pop();
         return [root].concat(rest);
     }
-    /**
-     * Parse a path into an array containing a root component (at index 0) and zero or more path
-     * components (at indices > 0). The result is not normalized.
-     * If the path is relative, the root component is `""`.
-     * If the path is absolute, the root component includes the first path separator (`/`).
-     */
     function getPathComponents(path, currentDirectory) {
         if (currentDirectory === void 0) { currentDirectory = ""; }
-        path = combinePaths(currentDirectory, path);
+        path = ts.combinePaths(currentDirectory, path);
         var rootLength = getRootLength(path);
         return pathComponents(path, rootLength);
     }
     ts.getPathComponents = getPathComponents;
-    /**
-     * Reduce an array of path components to a more simplified path by navigating any
-     * `"."` or `".."` entries in the path.
-     */
     function reducePathComponents(components) {
         if (!ts.some(components))
             return [];
@@ -14161,12 +11277,6 @@ var ts;
         return reduced;
     }
     ts.reducePathComponents = reducePathComponents;
-    /**
-     * Parse a path into an array containing a root component (at index 0) and zero or more path
-     * components (at indices > 0). The result is normalized.
-     * If the path is relative, the root component is `""`.
-     * If the path is absolute, the root component includes the first path separator (`/`).
-     */
     function getNormalizedPathComponents(path, currentDirectory) {
         return reducePathComponents(getPathComponents(path, currentDirectory));
     }
@@ -14175,22 +11285,20 @@ var ts;
         return getPathFromPathComponents(getNormalizedPathComponents(fileName, currentDirectory));
     }
     ts.getNormalizedAbsolutePath = getNormalizedAbsolutePath;
-    /**
-     * Formats a parsed path consisting of a root component (at index 0) and zero or more path
-     * segments (at indices > 0).
-     */
     function getPathFromPathComponents(pathComponents) {
         if (pathComponents.length === 0)
             return "";
-        var root = pathComponents[0] && ensureTrailingDirectorySeparator(pathComponents[0]);
+        var root = pathComponents[0] && ts.ensureTrailingDirectorySeparator(pathComponents[0]);
         if (pathComponents.length === 1)
             return root;
         return root + pathComponents.slice(1).join(ts.directorySeparator);
     }
     ts.getPathFromPathComponents = getPathFromPathComponents;
+})(ts || (ts = {}));
+(function (ts) {
     function getPathComponentsRelativeTo(from, to, stringEqualityComparer, getCanonicalFileName) {
-        var fromComponents = reducePathComponents(getPathComponents(from));
-        var toComponents = reducePathComponents(getPathComponents(to));
+        var fromComponents = ts.reducePathComponents(ts.getPathComponents(from));
+        var toComponents = ts.reducePathComponents(ts.getPathComponents(to));
         var start;
         for (start = 0; start < fromComponents.length && start < toComponents.length; start++) {
             var fromComponent = getCanonicalFileName(fromComponents[start]);
@@ -14209,66 +11317,57 @@ var ts;
         }
         return [""].concat(relative, components);
     }
+    ts.getPathComponentsRelativeTo = getPathComponentsRelativeTo;
     function getRelativePathFromFile(from, to, getCanonicalFileName) {
-        return ensurePathIsNonModuleName(getRelativePathFromDirectory(getDirectoryPath(from), to, getCanonicalFileName));
+        return ensurePathIsNonModuleName(getRelativePathFromDirectory(ts.getDirectoryPath(from), to, getCanonicalFileName));
     }
     ts.getRelativePathFromFile = getRelativePathFromFile;
     function getRelativePathFromDirectory(fromDirectory, to, getCanonicalFileNameOrIgnoreCase) {
-        Debug.assert((getRootLength(fromDirectory) > 0) === (getRootLength(to) > 0), "Paths must either both be absolute or both be relative");
+        Debug.assert((ts.getRootLength(fromDirectory) > 0) === (ts.getRootLength(to) > 0), "Paths must either both be absolute or both be relative");
         var getCanonicalFileName = typeof getCanonicalFileNameOrIgnoreCase === "function" ? getCanonicalFileNameOrIgnoreCase : ts.identity;
         var ignoreCase = typeof getCanonicalFileNameOrIgnoreCase === "boolean" ? getCanonicalFileNameOrIgnoreCase : false;
         var pathComponents = getPathComponentsRelativeTo(fromDirectory, to, ignoreCase ? ts.equateStringsCaseInsensitive : ts.equateStringsCaseSensitive, getCanonicalFileName);
-        return getPathFromPathComponents(pathComponents);
+        return ts.getPathFromPathComponents(pathComponents);
     }
     ts.getRelativePathFromDirectory = getRelativePathFromDirectory;
     function getRelativePathToDirectoryOrUrl(directoryPathOrUrl, relativeOrAbsolutePath, currentDirectory, getCanonicalFileName, isAbsolutePathAnUrl) {
         var pathComponents = getPathComponentsRelativeTo(resolvePath(currentDirectory, directoryPathOrUrl), resolvePath(currentDirectory, relativeOrAbsolutePath), ts.equateStringsCaseSensitive, getCanonicalFileName);
         var firstComponent = pathComponents[0];
-        if (isAbsolutePathAnUrl && isRootedDiskPath(firstComponent)) {
+        if (isAbsolutePathAnUrl && ts.isRootedDiskPath(firstComponent)) {
             var prefix = firstComponent.charAt(0) === ts.directorySeparator ? "file://" : "file:///";
             pathComponents[0] = prefix + firstComponent;
         }
-        return getPathFromPathComponents(pathComponents);
+        return ts.getPathFromPathComponents(pathComponents);
     }
     ts.getRelativePathToDirectoryOrUrl = getRelativePathToDirectoryOrUrl;
-    /**
-     * Ensures a path is either absolute (prefixed with `/` or `c:`) or dot-relative (prefixed
-     * with `./` or `../`) so as not to be confused with an unprefixed module name.
-     */
     function ensurePathIsNonModuleName(path) {
-        return getRootLength(path) === 0 && !pathIsRelative(path) ? "./" + path : path;
+        return ts.getRootLength(path) === 0 && !ts.pathIsRelative(path) ? "./" + path : path;
     }
     ts.ensurePathIsNonModuleName = ensurePathIsNonModuleName;
     function getBaseFileName(path, extensions, ignoreCase) {
-        path = normalizeSlashes(path);
-        // if the path provided is itself the root, then it has not file name.
-        var rootLength = getRootLength(path);
+        path = ts.normalizeSlashes(path);
+        var rootLength = ts.getRootLength(path);
         if (rootLength === path.length)
             return "";
-        // return the trailing portion of the path starting after the last (non-terminal) directory
-        // separator but not including any trailing directory separator.
         path = removeTrailingDirectorySeparator(path);
-        var name = path.slice(Math.max(getRootLength(path), path.lastIndexOf(ts.directorySeparator) + 1));
+        var name = path.slice(Math.max(ts.getRootLength(path), path.lastIndexOf(ts.directorySeparator) + 1));
         var extension = extensions !== undefined && ignoreCase !== undefined ? getAnyExtensionFromPath(name, extensions, ignoreCase) : undefined;
         return extension ? name.slice(0, name.length - extension.length) : name;
     }
     ts.getBaseFileName = getBaseFileName;
-    /**
-     * Combines paths. If a path is absolute, it replaces any previous path.
-     */
     function combinePaths(path) {
         var paths = [];
         for (var _i = 1; _i < arguments.length; _i++) {
             paths[_i - 1] = arguments[_i];
         }
         if (path)
-            path = normalizeSlashes(path);
+            path = ts.normalizeSlashes(path);
         for (var _a = 0, paths_1 = paths; _a < paths_1.length; _a++) {
             var relativePath = paths_1[_a];
             if (!relativePath)
                 continue;
-            relativePath = normalizeSlashes(relativePath);
-            if (!path || getRootLength(relativePath) !== 0) {
+            relativePath = ts.normalizeSlashes(relativePath);
+            if (!path || ts.getRootLength(relativePath) !== 0) {
                 path = relativePath;
             }
             else {
@@ -14278,28 +11377,21 @@ var ts;
         return path;
     }
     ts.combinePaths = combinePaths;
-    /**
-     * Combines and resolves paths. If a path is absolute, it replaces any previous path. Any
-     * `.` and `..` path components are resolved.
-     */
     function resolvePath(path) {
         var paths = [];
         for (var _i = 1; _i < arguments.length; _i++) {
             paths[_i - 1] = arguments[_i];
         }
-        var combined = ts.some(paths) ? combinePaths.apply(void 0, [path].concat(paths)) : normalizeSlashes(path);
-        var normalized = getPathFromPathComponents(reducePathComponents(getPathComponents(combined)));
+        var combined = ts.some(paths) ? combinePaths.apply(void 0, [path].concat(paths)) : ts.normalizeSlashes(path);
+        var normalized = ts.getPathFromPathComponents(ts.reducePathComponents(ts.getPathComponents(combined)));
         return normalized && hasTrailingDirectorySeparator(combined) ? ensureTrailingDirectorySeparator(normalized) : normalized;
     }
     ts.resolvePath = resolvePath;
-    /**
-     * Determines whether a path has a trailing separator (`/` or `\\`).
-     */
     function hasTrailingDirectorySeparator(path) {
         if (path.length === 0)
             return false;
         var ch = path.charCodeAt(path.length - 1);
-        return ch === 47 /* slash */ || ch === 92 /* backslash */;
+        return ch === 47 || ch === 92;
     }
     ts.hasTrailingDirectorySeparator = hasTrailingDirectorySeparator;
     function removeTrailingDirectorySeparator(path) {
@@ -14318,33 +11410,27 @@ var ts;
     ts.ensureTrailingDirectorySeparator = ensureTrailingDirectorySeparator;
     function comparePathsWorker(a, b, componentComparer) {
         if (a === b)
-            return 0 /* EqualTo */;
+            return 0;
         if (a === undefined)
-            return -1 /* LessThan */;
+            return -1;
         if (b === undefined)
-            return 1 /* GreaterThan */;
-        var aComponents = reducePathComponents(getPathComponents(a));
-        var bComponents = reducePathComponents(getPathComponents(b));
+            return 1;
+        var aComponents = ts.reducePathComponents(ts.getPathComponents(a));
+        var bComponents = ts.reducePathComponents(ts.getPathComponents(b));
         var sharedLength = Math.min(aComponents.length, bComponents.length);
         for (var i = 0; i < sharedLength; i++) {
             var stringComparer = i === 0 ? ts.compareStringsCaseInsensitive : componentComparer;
             var result = stringComparer(aComponents[i], bComponents[i]);
-            if (result !== 0 /* EqualTo */) {
+            if (result !== 0) {
                 return result;
             }
         }
         return ts.compareValues(aComponents.length, bComponents.length);
     }
-    /**
-     * Performs a case-sensitive comparison of two paths.
-     */
     function comparePathsCaseSensitive(a, b) {
         return comparePathsWorker(a, b, ts.compareStringsCaseSensitive);
     }
     ts.comparePathsCaseSensitive = comparePathsCaseSensitive;
-    /**
-     * Performs a case-insensitive comparison of two paths.
-     */
     function comparePathsCaseInsensitive(a, b) {
         return comparePathsWorker(a, b, ts.compareStringsCaseInsensitive);
     }
@@ -14372,8 +11458,8 @@ var ts;
             return false;
         if (parent === child)
             return true;
-        var parentComponents = reducePathComponents(getPathComponents(parent));
-        var childComponents = reducePathComponents(getPathComponents(child));
+        var parentComponents = ts.reducePathComponents(ts.getPathComponents(parent));
+        var childComponents = ts.reducePathComponents(ts.getPathComponents(child));
         if (childComponents.length < parentComponents.length) {
             return false;
         }
@@ -14392,19 +11478,16 @@ var ts;
         if (a === undefined)
             return undefined;
         switch (a.charCodeAt(0)) {
-            case 47 /* slash */:
-            case 92 /* backslash */:
+            case 47:
+            case 92:
                 return a.slice(1);
             default:
                 return undefined;
         }
     }
     ts.tryRemoveDirectoryPrefix = tryRemoveDirectoryPrefix;
-    // Reserved characters, forces escaping of any non-word (or digit), non-whitespace character.
-    // It may be inefficient (we could just match (/[-[\]{}()*+?.,\\^$|#\s]/g), but this is future
-    // proof.
     var reservedCharacterPattern = /[^\w\s\/]/g;
-    var wildcardCharCodes = [42 /* asterisk */, 63 /* question */];
+    var wildcardCharCodes = [42, 63];
     function hasExtension(fileName) {
         return ts.stringContains(getBaseFileName(fileName), ".");
     }
@@ -14412,26 +11495,12 @@ var ts;
     ts.commonPackageFolders = ["node_modules", "bower_components", "jspm_packages"];
     var implicitExcludePathRegexPattern = "(?!(" + ts.commonPackageFolders.join("|") + ")(/|$))";
     var filesMatcher = {
-        /**
-         * Matches any single directory segment unless it is the last segment and a .min.js file
-         * Breakdown:
-         *  [^./]                   # matches everything up to the first . character (excluding directory separators)
-         *  (\\.(?!min\\.js$))?     # matches . characters but not if they are part of the .min.js file extension
-         */
         singleAsteriskRegexFragment: "([^./]|(\\.(?!min\\.js$))?)*",
-        /**
-         * Regex for the ** wildcard. Matches any number of subdirectories. When used for including
-         * files or directories, does not match subdirectories that start with a . character
-         */
         doubleAsteriskRegexFragment: "(/" + implicitExcludePathRegexPattern + "[^/.][^/]*)*?",
         replaceWildcardCharacter: function (match) { return replaceWildcardCharacter(match, filesMatcher.singleAsteriskRegexFragment); }
     };
     var directoriesMatcher = {
         singleAsteriskRegexFragment: "[^/]*",
-        /**
-         * Regex for the ** wildcard. Matches any number of subdirectories. When used for including
-         * files or directories, does not match subdirectories that start with a . character
-         */
         doubleAsteriskRegexFragment: "(/" + implicitExcludePathRegexPattern + "[^/.][^/]*)*?",
         replaceWildcardCharacter: function (match) { return replaceWildcardCharacter(match, directoriesMatcher.singleAsteriskRegexFragment); }
     };
@@ -14451,7 +11520,6 @@ var ts;
             return undefined;
         }
         var pattern = patterns.map(function (pattern) { return "(" + pattern + ")"; }).join("|");
-        // If excluding, match "foo/bar/baz...", but if including, only allow "foo".
         var terminator = usage === "exclude" ? "($|/)" : "$";
         return "^(" + pattern + ")" + terminator;
     }
@@ -14464,10 +11532,6 @@ var ts;
             return spec && getSubPatternFromSpec(spec, basePath, usage, wildcardMatchers[usage]);
         });
     }
-    /**
-     * An "includes" path "foo" is implicitly a glob "foo/** /*" (without the space) if its last component has no extension,
-     * and does not contain any glob characters itself.
-     */
     function isImplicitGlob(lastPathComponent) {
         return !/[.*?]/.test(lastPathComponent);
     }
@@ -14476,13 +11540,11 @@ var ts;
         var singleAsteriskRegexFragment = _a.singleAsteriskRegexFragment, doubleAsteriskRegexFragment = _a.doubleAsteriskRegexFragment, replaceWildcardCharacter = _a.replaceWildcardCharacter;
         var subpattern = "";
         var hasWrittenComponent = false;
-        var components = getNormalizedPathComponents(spec, basePath);
+        var components = ts.getNormalizedPathComponents(spec, basePath);
         var lastComponent = ts.last(components);
         if (usage !== "exclude" && lastComponent === "**") {
             return undefined;
         }
-        // getNormalizedPathComponents includes the separator for the root component.
-        // We need to remove to create our regex correctly.
         components[0] = removeTrailingDirectorySeparator(components[0]);
         if (isImplicitGlob(lastComponent)) {
             components.push("**", "*");
@@ -14503,24 +11565,15 @@ var ts;
                 }
                 if (usage !== "exclude") {
                     var componentPattern = "";
-                    // The * and ? wildcards should not match directories or files that start with . if they
-                    // appear first in a component. Dotted directories and files can be included explicitly
-                    // like so: **/.*/.*
-                    if (component.charCodeAt(0) === 42 /* asterisk */) {
+                    if (component.charCodeAt(0) === 42) {
                         componentPattern += "([^./]" + singleAsteriskRegexFragment + ")?";
                         component = component.substr(1);
                     }
-                    else if (component.charCodeAt(0) === 63 /* question */) {
+                    else if (component.charCodeAt(0) === 63) {
                         componentPattern += "[^./]";
                         component = component.substr(1);
                     }
                     componentPattern += component.replace(reservedCharacterPattern, replaceWildcardCharacter);
-                    // Patterns should not include subfolders like node_modules unless they are
-                    // explicitly included as part of the path.
-                    //
-                    // As an optimization, if the component pattern is the same as the component,
-                    // then there definitely were no wildcard characters and we do not need to
-                    // add the exclusion pattern.
                     if (componentPattern !== component) {
                         subpattern += implicitExcludePathRegexPattern;
                     }
@@ -14541,10 +11594,9 @@ var ts;
     function replaceWildcardCharacter(match, singleAsteriskRegexFragment) {
         return match === "*" ? singleAsteriskRegexFragment : match === "?" ? "[^/]" : "\\" + match;
     }
-    /** @param path directory of the tsconfig.json */
     function getFileMatcherPatterns(path, excludes, includes, useCaseSensitiveFileNames, currentDirectory) {
-        path = normalizePath(path);
-        currentDirectory = normalizePath(currentDirectory);
+        path = ts.normalizePath(path);
+        currentDirectory = ts.normalizePath(currentDirectory);
         var absolutePath = combinePaths(currentDirectory, path);
         return {
             includeFilePatterns: ts.map(getRegularExpressionsForWildcards(includes, absolutePath, "files"), function (pattern) { return "^" + pattern + "$"; }),
@@ -14559,16 +11611,13 @@ var ts;
         return new RegExp(pattern, useCaseSensitiveFileNames ? "" : "i");
     }
     ts.getRegexFromPattern = getRegexFromPattern;
-    /** @param path directory of the tsconfig.json */
     function matchFiles(path, extensions, excludes, includes, useCaseSensitiveFileNames, currentDirectory, depth, getFileSystemEntries) {
-        path = normalizePath(path);
-        currentDirectory = normalizePath(currentDirectory);
+        path = ts.normalizePath(path);
+        currentDirectory = ts.normalizePath(currentDirectory);
         var patterns = getFileMatcherPatterns(path, excludes, includes, useCaseSensitiveFileNames, currentDirectory);
         var includeFileRegexes = patterns.includeFilePatterns && patterns.includeFilePatterns.map(function (pattern) { return getRegexFromPattern(pattern, useCaseSensitiveFileNames); });
         var includeDirectoryRegex = patterns.includeDirectoryPattern && getRegexFromPattern(patterns.includeDirectoryPattern, useCaseSensitiveFileNames);
         var excludeRegex = patterns.excludePattern && getRegexFromPattern(patterns.excludePattern, useCaseSensitiveFileNames);
-        // Associate an array of results with each include regex. This keeps results in order of the "include" order.
-        // If there are no "includes", then just put everything in results[0].
         var results = includeFileRegexes ? includeFileRegexes.map(function () { return []; }) : [[]];
         for (var _i = 0, _a = patterns.basePaths; _i < _a.length; _i++) {
             var basePath = _a[_i];
@@ -14616,32 +11665,21 @@ var ts;
         }
     }
     ts.matchFiles = matchFiles;
-    /**
-     * Computes the unique non-wildcard base paths amongst the provided include patterns.
-     */
     function getBasePaths(path, includes, useCaseSensitiveFileNames) {
-        // Storage for our results in the form of literal paths (e.g. the paths as written by the user).
         var basePaths = [path];
         if (includes) {
-            // Storage for literal base paths amongst the include patterns.
             var includeBasePaths = [];
             for (var _i = 0, includes_1 = includes; _i < includes_1.length; _i++) {
                 var include = includes_1[_i];
-                // We also need to check the relative paths by converting them to absolute and normalizing
-                // in case they escape the base path (e.g "..\somedirectory")
-                var absolute = isRootedDiskPath(include) ? include : normalizePath(combinePaths(path, include));
-                // Append the literal and canonical candidate base paths.
+                var absolute = ts.isRootedDiskPath(include) ? include : ts.normalizePath(combinePaths(path, include));
                 includeBasePaths.push(getIncludeBasePath(absolute));
             }
-            // Sort the offsets array using either the literal or canonical path representations.
             includeBasePaths.sort(ts.getStringComparer(!useCaseSensitiveFileNames));
             var _loop_2 = function (includeBasePath) {
                 if (ts.every(basePaths, function (basePath) { return !containsPath(basePath, includeBasePath, path, !useCaseSensitiveFileNames); })) {
                     basePaths.push(includeBasePath);
                 }
             };
-            // Iterate over each include base path and include unique base paths that are not a
-            // subpath of an existing base path
             for (var _a = 0, includeBasePaths_1 = includeBasePaths; _a < includeBasePaths_1.length; _a++) {
                 var includeBasePath = includeBasePaths_1[_a];
                 _loop_2(includeBasePath);
@@ -14652,60 +11690,49 @@ var ts;
     function getIncludeBasePath(absolute) {
         var wildcardOffset = ts.indexOfAnyCharCode(absolute, wildcardCharCodes);
         if (wildcardOffset < 0) {
-            // No "*" or "?" in the path
             return !hasExtension(absolute)
                 ? absolute
-                : removeTrailingDirectorySeparator(getDirectoryPath(absolute));
+                : removeTrailingDirectorySeparator(ts.getDirectoryPath(absolute));
         }
         return absolute.substring(0, absolute.lastIndexOf(ts.directorySeparator, wildcardOffset));
     }
     function ensureScriptKind(fileName, scriptKind) {
-        // Using scriptKind as a condition handles both:
-        // - 'scriptKind' is unspecified and thus it is `undefined`
-        // - 'scriptKind' is set and it is `Unknown` (0)
-        // If the 'scriptKind' is 'undefined' or 'Unknown' then we attempt
-        // to get the ScriptKind from the file name. If it cannot be resolved
-        // from the file name then the default 'TS' script kind is returned.
-        return scriptKind || getScriptKindFromFileName(fileName) || 3 /* TS */;
+        return scriptKind || getScriptKindFromFileName(fileName) || 3;
     }
     ts.ensureScriptKind = ensureScriptKind;
     function getScriptKindFromFileName(fileName) {
         var ext = fileName.substr(fileName.lastIndexOf("."));
         switch (ext.toLowerCase()) {
-            case ".js" /* Js */:
-                return 1 /* JS */;
-            case ".jsx" /* Jsx */:
-                return 2 /* JSX */;
-            case ".ts" /* Ts */:
-                return 3 /* TS */;
-            case ".tsx" /* Tsx */:
-                return 4 /* TSX */;
-            case ".json" /* Json */:
-                return 6 /* JSON */;
+            case ".js":
+                return 1;
+            case ".jsx":
+                return 2;
+            case ".ts":
+                return 3;
+            case ".tsx":
+                return 4;
+            case ".json":
+                return 6;
             default:
-                return 0 /* Unknown */;
+                return 0;
         }
     }
     ts.getScriptKindFromFileName = getScriptKindFromFileName;
-    /**
-     *  List of supported extensions in order of file resolution precedence.
-     */
-    ts.supportedTypeScriptExtensions = [".ts" /* Ts */, ".tsx" /* Tsx */, ".d.ts" /* Dts */];
-    /** Must have ".d.ts" first because if ".ts" goes first, that will be detected as the extension instead of ".d.ts". */
-    ts.supportedTypescriptExtensionsForExtractExtension = [".d.ts" /* Dts */, ".ts" /* Ts */, ".tsx" /* Tsx */];
-    ts.supportedJavascriptExtensions = [".js" /* Js */, ".jsx" /* Jsx */];
+    ts.supportedTypeScriptExtensions = [".ts", ".tsx", ".d.ts"];
+    ts.supportedTypescriptExtensionsForExtractExtension = [".d.ts", ".ts", ".tsx"];
+    ts.supportedJavascriptExtensions = [".js", ".jsx"];
     var allSupportedExtensions = ts.supportedTypeScriptExtensions.concat(ts.supportedJavascriptExtensions);
     function getSupportedExtensions(options, extraFileExtensions) {
         var needJsExtensions = options && options.allowJs;
         if (!extraFileExtensions || extraFileExtensions.length === 0) {
             return needJsExtensions ? allSupportedExtensions : ts.supportedTypeScriptExtensions;
         }
-        var extensions = (needJsExtensions ? allSupportedExtensions : ts.supportedTypeScriptExtensions).concat(ts.mapDefined(extraFileExtensions, function (x) { return x.scriptKind === 7 /* Deferred */ || needJsExtensions && isJavaScriptLike(x.scriptKind) ? x.extension : undefined; }));
+        var extensions = (needJsExtensions ? allSupportedExtensions : ts.supportedTypeScriptExtensions).concat(ts.mapDefined(extraFileExtensions, function (x) { return x.scriptKind === 7 || needJsExtensions && isJavaScriptLike(x.scriptKind) ? x.extension : undefined; }));
         return ts.deduplicate(extensions, ts.equateStringsCaseSensitive, ts.compareStringsCaseSensitive);
     }
     ts.getSupportedExtensions = getSupportedExtensions;
     function isJavaScriptLike(scriptKind) {
-        return scriptKind === 1 /* JS */ || scriptKind === 2 /* JSX */;
+        return scriptKind === 1 || scriptKind === 2;
     }
     function hasJavaScriptFileExtension(fileName) {
         return ts.some(ts.supportedJavascriptExtensions, function (extension) { return ts.fileExtensionIs(fileName, extension); });
@@ -14728,57 +11755,37 @@ var ts;
         return false;
     }
     ts.isSupportedSourceFileName = isSupportedSourceFileName;
-    /**
-     * Extension boundaries by priority. Lower numbers indicate higher priorities, and are
-     * aligned to the offset of the highest priority extension in the
-     * allSupportedExtensions array.
-     */
-    var ExtensionPriority;
-    (function (ExtensionPriority) {
-        ExtensionPriority[ExtensionPriority["TypeScriptFiles"] = 0] = "TypeScriptFiles";
-        ExtensionPriority[ExtensionPriority["DeclarationAndJavaScriptFiles"] = 2] = "DeclarationAndJavaScriptFiles";
-        ExtensionPriority[ExtensionPriority["Highest"] = 0] = "Highest";
-        ExtensionPriority[ExtensionPriority["Lowest"] = 2] = "Lowest";
-    })(ExtensionPriority = ts.ExtensionPriority || (ts.ExtensionPriority = {}));
     function getExtensionPriority(path, supportedExtensions) {
         for (var i = supportedExtensions.length - 1; i >= 0; i--) {
             if (ts.fileExtensionIs(path, supportedExtensions[i])) {
                 return adjustExtensionPriority(i, supportedExtensions);
             }
         }
-        // If its not in the list of supported extensions, this is likely a
-        // TypeScript file with a non-ts extension
-        return 0 /* Highest */;
+        return 0;
     }
     ts.getExtensionPriority = getExtensionPriority;
-    /**
-     * Adjusts an extension priority to be the highest priority within the same range.
-     */
     function adjustExtensionPriority(extensionPriority, supportedExtensions) {
-        if (extensionPriority < 2 /* DeclarationAndJavaScriptFiles */) {
-            return 0 /* TypeScriptFiles */;
+        if (extensionPriority < 2) {
+            return 0;
         }
         else if (extensionPriority < supportedExtensions.length) {
-            return 2 /* DeclarationAndJavaScriptFiles */;
+            return 2;
         }
         else {
             return supportedExtensions.length;
         }
     }
     ts.adjustExtensionPriority = adjustExtensionPriority;
-    /**
-     * Gets the next lowest extension priority for a given priority.
-     */
     function getNextLowestExtensionPriority(extensionPriority, supportedExtensions) {
-        if (extensionPriority < 2 /* DeclarationAndJavaScriptFiles */) {
-            return 2 /* DeclarationAndJavaScriptFiles */;
+        if (extensionPriority < 2) {
+            return 2;
         }
         else {
             return supportedExtensions.length;
         }
     }
     ts.getNextLowestExtensionPriority = getNextLowestExtensionPriority;
-    var extensionsToRemove = [".d.ts" /* Dts */, ".ts" /* Ts */, ".js" /* Js */, ".tsx" /* Tsx */, ".jsx" /* Jsx */, ".json" /* Json */];
+    var extensionsToRemove = [".d.ts", ".ts", ".js", ".tsx", ".jsx", ".json"];
     function removeFileExtension(path) {
         for (var _i = 0, extensionsToRemove_1 = extensionsToRemove; _i < extensionsToRemove_1.length; _i++) {
             var ext = extensionsToRemove_1[_i];
@@ -14799,7 +11806,7 @@ var ts;
     }
     ts.removeExtension = removeExtension;
     function changeExtension(path, newExtension) {
-        return changeAnyExtension(path, newExtension, extensionsToRemove, /*ignoreCase*/ false);
+        return changeAnyExtension(path, newExtension, extensionsToRemove, false);
     }
     ts.changeExtension = changeExtension;
     function changeAnyExtension(path, ext, extensions, ignoreCase) {
@@ -14831,8 +11838,7 @@ var ts;
         Debug.showSyntaxKind = showSyntaxKind;
     })(Debug = ts.Debug || (ts.Debug = {}));
     function tryParsePattern(pattern) {
-        // This should be verified outside of here and a proper error thrown.
-        Debug.assert(hasZeroOrOneAsteriskCharacter(pattern));
+        Debug.assert(ts.hasZeroOrOneAsteriskCharacter(pattern));
         var indexOfStar = pattern.indexOf("*");
         return indexOfStar === -1 ? undefined : {
             prefix: pattern.substr(0, indexOfStar),
@@ -14841,24 +11847,17 @@ var ts;
     }
     ts.tryParsePattern = tryParsePattern;
     function positionIsSynthesized(pos) {
-        // This is a fast way of testing the following conditions:
-        //  pos === undefined || pos === null || isNaN(pos) || pos < 0;
         return !(pos >= 0);
     }
     ts.positionIsSynthesized = positionIsSynthesized;
-    /** True if an extension is one of the supported TypeScript extensions. */
     function extensionIsTypeScript(ext) {
-        return ext === ".ts" /* Ts */ || ext === ".tsx" /* Tsx */ || ext === ".d.ts" /* Dts */;
+        return ext === ".ts" || ext === ".tsx" || ext === ".d.ts";
     }
     ts.extensionIsTypeScript = extensionIsTypeScript;
     function resolutionExtensionIsTypeScriptOrJson(ext) {
-        return extensionIsTypeScript(ext) || ext === ".json" /* Json */;
+        return extensionIsTypeScript(ext) || ext === ".json";
     }
     ts.resolutionExtensionIsTypeScriptOrJson = resolutionExtensionIsTypeScriptOrJson;
-    /**
-     * Gets the extension from a path.
-     * Path must have a valid extension.
-     */
     function extensionFromPath(path) {
         var ext = tryGetExtensionFromPath(path);
         return ext !== undefined ? ext : Debug.fail("File " + path + " has unknown extension.");
@@ -14875,8 +11874,8 @@ var ts;
     function getAnyExtensionFromPathWorker(path, extensions, stringEqualityComparer) {
         if (typeof extensions === "string")
             extensions = [extensions];
-        for (var _i = 0, extensions_1 = extensions; _i < extensions_1.length; _i++) {
-            var extension = extensions_1[_i];
+        for (var _i = 0, extensions_2 = extensions; _i < extensions_2.length; _i++) {
+            var extension = extensions_2[_i];
             if (!ts.startsWith(extension, "."))
                 extension = "." + extension;
             if (path.length >= extension.length && path.charAt(path.length - extension.length) === ".") {
@@ -14889,8 +11888,6 @@ var ts;
         return "";
     }
     function getAnyExtensionFromPath(path, extensions, ignoreCase) {
-        // Retrieves any string from the final "." onwards from a base file name.
-        // Unlike extensionFromPath, which throws an exception on unrecognized extensions.
         if (extensions) {
             return getAnyExtensionFromPathWorker(path, extensions, ignoreCase ? ts.equateStringsCaseInsensitive : ts.equateStringsCaseSensitive);
         }
@@ -14910,11 +11907,6 @@ var ts;
         files: ts.emptyArray,
         directories: ts.emptyArray
     };
-    /**
-     * patternStrings contains both pattern strings (containing "*") and regular strings.
-     * Return an exact match if possible, or a pattern match, or undefined.
-     * (These are verified by verifyCompilerOptions to have 0 or 1 "*" characters.)
-     */
     function matchPatternOrExact(patternStrings, candidate) {
         var patterns = [];
         for (var _i = 0, patternStrings_1 = patternStrings; _i < patternStrings_1.length; _i++) {
@@ -14924,7 +11916,6 @@ var ts;
                 patterns.push(pattern);
             }
             else if (patternString === candidate) {
-                // pattern was matched as is - no need to search further
                 return patternString;
             }
         }
@@ -14934,26 +11925,15 @@ var ts;
 })(ts || (ts = {}));
 var ts;
 (function (ts) {
-    var SignatureFlags;
-    (function (SignatureFlags) {
-        SignatureFlags[SignatureFlags["None"] = 0] = "None";
-        SignatureFlags[SignatureFlags["Yield"] = 1] = "Yield";
-        SignatureFlags[SignatureFlags["Await"] = 2] = "Await";
-        SignatureFlags[SignatureFlags["Type"] = 4] = "Type";
-        SignatureFlags[SignatureFlags["IgnoreMissingOpenBrace"] = 16] = "IgnoreMissingOpenBrace";
-        SignatureFlags[SignatureFlags["JSDoc"] = 32] = "JSDoc";
-    })(SignatureFlags || (SignatureFlags = {}));
-    // tslint:disable variable-name
     var NodeConstructor;
     var TokenConstructor;
     var IdentifierConstructor;
     var SourceFileConstructor;
-    // tslint:enable variable-name
     function createNode(kind, pos, end) {
-        if (kind === 274 /* SourceFile */) {
+        if (kind === 274) {
             return new (SourceFileConstructor || (SourceFileConstructor = ts.objectAllocator.getSourceFileConstructor()))(kind, pos, end);
         }
-        else if (kind === 71 /* Identifier */) {
+        else if (kind === 71) {
             return new (IdentifierConstructor || (IdentifierConstructor = ts.objectAllocator.getIdentifierConstructor()))(kind, pos, end);
         }
         else if (!ts.isNodeKind(kind)) {
@@ -14981,49 +11961,35 @@ var ts;
             }
         }
     }
-    /*@internal*/
     function isJSDocLikeText(text, start) {
-        return text.charCodeAt(start + 1) === 42 /* asterisk */ &&
-            text.charCodeAt(start + 2) === 42 /* asterisk */ &&
-            text.charCodeAt(start + 3) !== 47 /* slash */;
+        return text.charCodeAt(start + 1) === 42 &&
+            text.charCodeAt(start + 2) === 42 &&
+            text.charCodeAt(start + 3) !== 47;
     }
     ts.isJSDocLikeText = isJSDocLikeText;
-    /**
-     * Invokes a callback for each child of the given node. The 'cbNode' callback is invoked for all child nodes
-     * stored in properties. If a 'cbNodes' callback is specified, it is invoked for embedded arrays; otherwise,
-     * embedded arrays are flattened and the 'cbNode' callback is invoked for each element. If a callback returns
-     * a truthy value, iteration stops and that value is returned. Otherwise, undefined is returned.
-     *
-     * @param node a given node to visit its children
-     * @param cbNode a callback to be invoked for all child nodes
-     * @param cbNodes a callback to be invoked for embedded array
-     *
-     * @remarks `forEachChild` must visit the children of a node in the order
-     * that they appear in the source code. The language service depends on this property to locate nodes by position.
-     */
     function forEachChild(node, cbNode, cbNodes) {
-        if (!node || node.kind <= 145 /* LastToken */) {
+        if (!node || node.kind <= 145) {
             return;
         }
         switch (node.kind) {
-            case 146 /* QualifiedName */:
+            case 146:
                 return visitNode(cbNode, node.left) ||
                     visitNode(cbNode, node.right);
-            case 148 /* TypeParameter */:
+            case 148:
                 return visitNode(cbNode, node.name) ||
                     visitNode(cbNode, node.constraint) ||
                     visitNode(cbNode, node.default) ||
                     visitNode(cbNode, node.expression);
-            case 271 /* ShorthandPropertyAssignment */:
+            case 271:
                 return visitNodes(cbNode, cbNodes, node.decorators) ||
                     visitNodes(cbNode, cbNodes, node.modifiers) ||
                     visitNode(cbNode, node.name) ||
                     visitNode(cbNode, node.questionToken) ||
                     visitNode(cbNode, node.equalsToken) ||
                     visitNode(cbNode, node.objectAssignmentInitializer);
-            case 272 /* SpreadAssignment */:
+            case 272:
                 return visitNode(cbNode, node.expression);
-            case 149 /* Parameter */:
+            case 149:
                 return visitNodes(cbNode, cbNodes, node.decorators) ||
                     visitNodes(cbNode, cbNodes, node.modifiers) ||
                     visitNode(cbNode, node.dotDotDotToken) ||
@@ -15031,7 +11997,7 @@ var ts;
                     visitNode(cbNode, node.questionToken) ||
                     visitNode(cbNode, node.type) ||
                     visitNode(cbNode, node.initializer);
-            case 152 /* PropertyDeclaration */:
+            case 152:
                 return visitNodes(cbNode, cbNodes, node.decorators) ||
                     visitNodes(cbNode, cbNodes, node.modifiers) ||
                     visitNode(cbNode, node.name) ||
@@ -15039,51 +12005,51 @@ var ts;
                     visitNode(cbNode, node.exclamationToken) ||
                     visitNode(cbNode, node.type) ||
                     visitNode(cbNode, node.initializer);
-            case 151 /* PropertySignature */:
+            case 151:
                 return visitNodes(cbNode, cbNodes, node.decorators) ||
                     visitNodes(cbNode, cbNodes, node.modifiers) ||
                     visitNode(cbNode, node.name) ||
                     visitNode(cbNode, node.questionToken) ||
                     visitNode(cbNode, node.type) ||
                     visitNode(cbNode, node.initializer);
-            case 270 /* PropertyAssignment */:
+            case 270:
                 return visitNodes(cbNode, cbNodes, node.decorators) ||
                     visitNodes(cbNode, cbNodes, node.modifiers) ||
                     visitNode(cbNode, node.name) ||
                     visitNode(cbNode, node.questionToken) ||
                     visitNode(cbNode, node.initializer);
-            case 232 /* VariableDeclaration */:
+            case 232:
                 return visitNodes(cbNode, cbNodes, node.decorators) ||
                     visitNodes(cbNode, cbNodes, node.modifiers) ||
                     visitNode(cbNode, node.name) ||
                     visitNode(cbNode, node.exclamationToken) ||
                     visitNode(cbNode, node.type) ||
                     visitNode(cbNode, node.initializer);
-            case 182 /* BindingElement */:
+            case 182:
                 return visitNodes(cbNode, cbNodes, node.decorators) ||
                     visitNodes(cbNode, cbNodes, node.modifiers) ||
                     visitNode(cbNode, node.dotDotDotToken) ||
                     visitNode(cbNode, node.propertyName) ||
                     visitNode(cbNode, node.name) ||
                     visitNode(cbNode, node.initializer);
-            case 163 /* FunctionType */:
-            case 164 /* ConstructorType */:
-            case 158 /* CallSignature */:
-            case 159 /* ConstructSignature */:
-            case 160 /* IndexSignature */:
+            case 163:
+            case 164:
+            case 158:
+            case 159:
+            case 160:
                 return visitNodes(cbNode, cbNodes, node.decorators) ||
                     visitNodes(cbNode, cbNodes, node.modifiers) ||
                     visitNodes(cbNode, cbNodes, node.typeParameters) ||
                     visitNodes(cbNode, cbNodes, node.parameters) ||
                     visitNode(cbNode, node.type);
-            case 154 /* MethodDeclaration */:
-            case 153 /* MethodSignature */:
-            case 155 /* Constructor */:
-            case 156 /* GetAccessor */:
-            case 157 /* SetAccessor */:
-            case 192 /* FunctionExpression */:
-            case 234 /* FunctionDeclaration */:
-            case 193 /* ArrowFunction */:
+            case 154:
+            case 153:
+            case 155:
+            case 156:
+            case 157:
+            case 192:
+            case 234:
+            case 193:
                 return visitNodes(cbNode, cbNodes, node.decorators) ||
                     visitNodes(cbNode, cbNodes, node.modifiers) ||
                     visitNode(cbNode, node.asteriskToken) ||
@@ -15094,304 +12060,304 @@ var ts;
                     visitNode(cbNode, node.type) ||
                     visitNode(cbNode, node.equalsGreaterThanToken) ||
                     visitNode(cbNode, node.body);
-            case 162 /* TypeReference */:
+            case 162:
                 return visitNode(cbNode, node.typeName) ||
                     visitNodes(cbNode, cbNodes, node.typeArguments);
-            case 161 /* TypePredicate */:
+            case 161:
                 return visitNode(cbNode, node.parameterName) ||
                     visitNode(cbNode, node.type);
-            case 165 /* TypeQuery */:
+            case 165:
                 return visitNode(cbNode, node.exprName);
-            case 166 /* TypeLiteral */:
+            case 166:
                 return visitNodes(cbNode, cbNodes, node.members);
-            case 167 /* ArrayType */:
+            case 167:
                 return visitNode(cbNode, node.elementType);
-            case 168 /* TupleType */:
+            case 168:
                 return visitNodes(cbNode, cbNodes, node.elementTypes);
-            case 169 /* UnionType */:
-            case 170 /* IntersectionType */:
+            case 169:
+            case 170:
                 return visitNodes(cbNode, cbNodes, node.types);
-            case 171 /* ConditionalType */:
+            case 171:
                 return visitNode(cbNode, node.checkType) ||
                     visitNode(cbNode, node.extendsType) ||
                     visitNode(cbNode, node.trueType) ||
                     visitNode(cbNode, node.falseType);
-            case 172 /* InferType */:
+            case 172:
                 return visitNode(cbNode, node.typeParameter);
-            case 179 /* ImportType */:
+            case 179:
                 return visitNode(cbNode, node.argument) ||
                     visitNode(cbNode, node.qualifier) ||
                     visitNodes(cbNode, cbNodes, node.typeArguments);
-            case 173 /* ParenthesizedType */:
-            case 175 /* TypeOperator */:
+            case 173:
+            case 175:
                 return visitNode(cbNode, node.type);
-            case 176 /* IndexedAccessType */:
+            case 176:
                 return visitNode(cbNode, node.objectType) ||
                     visitNode(cbNode, node.indexType);
-            case 177 /* MappedType */:
+            case 177:
                 return visitNode(cbNode, node.readonlyToken) ||
                     visitNode(cbNode, node.typeParameter) ||
                     visitNode(cbNode, node.questionToken) ||
                     visitNode(cbNode, node.type);
-            case 178 /* LiteralType */:
+            case 178:
                 return visitNode(cbNode, node.literal);
-            case 180 /* ObjectBindingPattern */:
-            case 181 /* ArrayBindingPattern */:
+            case 180:
+            case 181:
                 return visitNodes(cbNode, cbNodes, node.elements);
-            case 183 /* ArrayLiteralExpression */:
+            case 183:
                 return visitNodes(cbNode, cbNodes, node.elements);
-            case 184 /* ObjectLiteralExpression */:
+            case 184:
                 return visitNodes(cbNode, cbNodes, node.properties);
-            case 185 /* PropertyAccessExpression */:
+            case 185:
                 return visitNode(cbNode, node.expression) ||
                     visitNode(cbNode, node.name);
-            case 186 /* ElementAccessExpression */:
+            case 186:
                 return visitNode(cbNode, node.expression) ||
                     visitNode(cbNode, node.argumentExpression);
-            case 187 /* CallExpression */:
-            case 188 /* NewExpression */:
+            case 187:
+            case 188:
                 return visitNode(cbNode, node.expression) ||
                     visitNodes(cbNode, cbNodes, node.typeArguments) ||
                     visitNodes(cbNode, cbNodes, node.arguments);
-            case 189 /* TaggedTemplateExpression */:
+            case 189:
                 return visitNode(cbNode, node.tag) ||
                     visitNodes(cbNode, cbNodes, node.typeArguments) ||
                     visitNode(cbNode, node.template);
-            case 190 /* TypeAssertionExpression */:
+            case 190:
                 return visitNode(cbNode, node.type) ||
                     visitNode(cbNode, node.expression);
-            case 191 /* ParenthesizedExpression */:
+            case 191:
                 return visitNode(cbNode, node.expression);
-            case 194 /* DeleteExpression */:
+            case 194:
                 return visitNode(cbNode, node.expression);
-            case 195 /* TypeOfExpression */:
+            case 195:
                 return visitNode(cbNode, node.expression);
-            case 196 /* VoidExpression */:
+            case 196:
                 return visitNode(cbNode, node.expression);
-            case 198 /* PrefixUnaryExpression */:
+            case 198:
                 return visitNode(cbNode, node.operand);
-            case 203 /* YieldExpression */:
+            case 203:
                 return visitNode(cbNode, node.asteriskToken) ||
                     visitNode(cbNode, node.expression);
-            case 197 /* AwaitExpression */:
+            case 197:
                 return visitNode(cbNode, node.expression);
-            case 199 /* PostfixUnaryExpression */:
+            case 199:
                 return visitNode(cbNode, node.operand);
-            case 200 /* BinaryExpression */:
+            case 200:
                 return visitNode(cbNode, node.left) ||
                     visitNode(cbNode, node.operatorToken) ||
                     visitNode(cbNode, node.right);
-            case 208 /* AsExpression */:
+            case 208:
                 return visitNode(cbNode, node.expression) ||
                     visitNode(cbNode, node.type);
-            case 209 /* NonNullExpression */:
+            case 209:
                 return visitNode(cbNode, node.expression);
-            case 210 /* MetaProperty */:
+            case 210:
                 return visitNode(cbNode, node.name);
-            case 201 /* ConditionalExpression */:
+            case 201:
                 return visitNode(cbNode, node.condition) ||
                     visitNode(cbNode, node.questionToken) ||
                     visitNode(cbNode, node.whenTrue) ||
                     visitNode(cbNode, node.colonToken) ||
                     visitNode(cbNode, node.whenFalse);
-            case 204 /* SpreadElement */:
+            case 204:
                 return visitNode(cbNode, node.expression);
-            case 213 /* Block */:
-            case 240 /* ModuleBlock */:
+            case 213:
+            case 240:
                 return visitNodes(cbNode, cbNodes, node.statements);
-            case 274 /* SourceFile */:
+            case 274:
                 return visitNodes(cbNode, cbNodes, node.statements) ||
                     visitNode(cbNode, node.endOfFileToken);
-            case 214 /* VariableStatement */:
+            case 214:
                 return visitNodes(cbNode, cbNodes, node.decorators) ||
                     visitNodes(cbNode, cbNodes, node.modifiers) ||
                     visitNode(cbNode, node.declarationList);
-            case 233 /* VariableDeclarationList */:
+            case 233:
                 return visitNodes(cbNode, cbNodes, node.declarations);
-            case 216 /* ExpressionStatement */:
+            case 216:
                 return visitNode(cbNode, node.expression);
-            case 217 /* IfStatement */:
+            case 217:
                 return visitNode(cbNode, node.expression) ||
                     visitNode(cbNode, node.thenStatement) ||
                     visitNode(cbNode, node.elseStatement);
-            case 218 /* DoStatement */:
+            case 218:
                 return visitNode(cbNode, node.statement) ||
                     visitNode(cbNode, node.expression);
-            case 219 /* WhileStatement */:
+            case 219:
                 return visitNode(cbNode, node.expression) ||
                     visitNode(cbNode, node.statement);
-            case 220 /* ForStatement */:
+            case 220:
                 return visitNode(cbNode, node.initializer) ||
                     visitNode(cbNode, node.condition) ||
                     visitNode(cbNode, node.incrementor) ||
                     visitNode(cbNode, node.statement);
-            case 221 /* ForInStatement */:
+            case 221:
                 return visitNode(cbNode, node.initializer) ||
                     visitNode(cbNode, node.expression) ||
                     visitNode(cbNode, node.statement);
-            case 222 /* ForOfStatement */:
+            case 222:
                 return visitNode(cbNode, node.awaitModifier) ||
                     visitNode(cbNode, node.initializer) ||
                     visitNode(cbNode, node.expression) ||
                     visitNode(cbNode, node.statement);
-            case 223 /* ContinueStatement */:
-            case 224 /* BreakStatement */:
+            case 223:
+            case 224:
                 return visitNode(cbNode, node.label);
-            case 225 /* ReturnStatement */:
+            case 225:
                 return visitNode(cbNode, node.expression);
-            case 226 /* WithStatement */:
+            case 226:
                 return visitNode(cbNode, node.expression) ||
                     visitNode(cbNode, node.statement);
-            case 227 /* SwitchStatement */:
+            case 227:
                 return visitNode(cbNode, node.expression) ||
                     visitNode(cbNode, node.caseBlock);
-            case 241 /* CaseBlock */:
+            case 241:
                 return visitNodes(cbNode, cbNodes, node.clauses);
-            case 266 /* CaseClause */:
+            case 266:
                 return visitNode(cbNode, node.expression) ||
                     visitNodes(cbNode, cbNodes, node.statements);
-            case 267 /* DefaultClause */:
+            case 267:
                 return visitNodes(cbNode, cbNodes, node.statements);
-            case 228 /* LabeledStatement */:
+            case 228:
                 return visitNode(cbNode, node.label) ||
                     visitNode(cbNode, node.statement);
-            case 229 /* ThrowStatement */:
+            case 229:
                 return visitNode(cbNode, node.expression);
-            case 230 /* TryStatement */:
+            case 230:
                 return visitNode(cbNode, node.tryBlock) ||
                     visitNode(cbNode, node.catchClause) ||
                     visitNode(cbNode, node.finallyBlock);
-            case 269 /* CatchClause */:
+            case 269:
                 return visitNode(cbNode, node.variableDeclaration) ||
                     visitNode(cbNode, node.block);
-            case 150 /* Decorator */:
+            case 150:
                 return visitNode(cbNode, node.expression);
-            case 235 /* ClassDeclaration */:
-            case 205 /* ClassExpression */:
+            case 235:
+            case 205:
                 return visitNodes(cbNode, cbNodes, node.decorators) ||
                     visitNodes(cbNode, cbNodes, node.modifiers) ||
                     visitNode(cbNode, node.name) ||
                     visitNodes(cbNode, cbNodes, node.typeParameters) ||
                     visitNodes(cbNode, cbNodes, node.heritageClauses) ||
                     visitNodes(cbNode, cbNodes, node.members);
-            case 236 /* InterfaceDeclaration */:
+            case 236:
                 return visitNodes(cbNode, cbNodes, node.decorators) ||
                     visitNodes(cbNode, cbNodes, node.modifiers) ||
                     visitNode(cbNode, node.name) ||
                     visitNodes(cbNode, cbNodes, node.typeParameters) ||
                     visitNodes(cbNode, cbNodes, node.heritageClauses) ||
                     visitNodes(cbNode, cbNodes, node.members);
-            case 237 /* TypeAliasDeclaration */:
+            case 237:
                 return visitNodes(cbNode, cbNodes, node.decorators) ||
                     visitNodes(cbNode, cbNodes, node.modifiers) ||
                     visitNode(cbNode, node.name) ||
                     visitNodes(cbNode, cbNodes, node.typeParameters) ||
                     visitNode(cbNode, node.type);
-            case 238 /* EnumDeclaration */:
+            case 238:
                 return visitNodes(cbNode, cbNodes, node.decorators) ||
                     visitNodes(cbNode, cbNodes, node.modifiers) ||
                     visitNode(cbNode, node.name) ||
                     visitNodes(cbNode, cbNodes, node.members);
-            case 273 /* EnumMember */:
+            case 273:
                 return visitNode(cbNode, node.name) ||
                     visitNode(cbNode, node.initializer);
-            case 239 /* ModuleDeclaration */:
+            case 239:
                 return visitNodes(cbNode, cbNodes, node.decorators) ||
                     visitNodes(cbNode, cbNodes, node.modifiers) ||
                     visitNode(cbNode, node.name) ||
                     visitNode(cbNode, node.body);
-            case 243 /* ImportEqualsDeclaration */:
+            case 243:
                 return visitNodes(cbNode, cbNodes, node.decorators) ||
                     visitNodes(cbNode, cbNodes, node.modifiers) ||
                     visitNode(cbNode, node.name) ||
                     visitNode(cbNode, node.moduleReference);
-            case 244 /* ImportDeclaration */:
+            case 244:
                 return visitNodes(cbNode, cbNodes, node.decorators) ||
                     visitNodes(cbNode, cbNodes, node.modifiers) ||
                     visitNode(cbNode, node.importClause) ||
                     visitNode(cbNode, node.moduleSpecifier);
-            case 245 /* ImportClause */:
+            case 245:
                 return visitNode(cbNode, node.name) ||
                     visitNode(cbNode, node.namedBindings);
-            case 242 /* NamespaceExportDeclaration */:
+            case 242:
                 return visitNode(cbNode, node.name);
-            case 246 /* NamespaceImport */:
+            case 246:
                 return visitNode(cbNode, node.name);
-            case 247 /* NamedImports */:
-            case 251 /* NamedExports */:
+            case 247:
+            case 251:
                 return visitNodes(cbNode, cbNodes, node.elements);
-            case 250 /* ExportDeclaration */:
+            case 250:
                 return visitNodes(cbNode, cbNodes, node.decorators) ||
                     visitNodes(cbNode, cbNodes, node.modifiers) ||
                     visitNode(cbNode, node.exportClause) ||
                     visitNode(cbNode, node.moduleSpecifier);
-            case 248 /* ImportSpecifier */:
-            case 252 /* ExportSpecifier */:
+            case 248:
+            case 252:
                 return visitNode(cbNode, node.propertyName) ||
                     visitNode(cbNode, node.name);
-            case 249 /* ExportAssignment */:
+            case 249:
                 return visitNodes(cbNode, cbNodes, node.decorators) ||
                     visitNodes(cbNode, cbNodes, node.modifiers) ||
                     visitNode(cbNode, node.expression);
-            case 202 /* TemplateExpression */:
+            case 202:
                 return visitNode(cbNode, node.head) || visitNodes(cbNode, cbNodes, node.templateSpans);
-            case 211 /* TemplateSpan */:
+            case 211:
                 return visitNode(cbNode, node.expression) || visitNode(cbNode, node.literal);
-            case 147 /* ComputedPropertyName */:
+            case 147:
                 return visitNode(cbNode, node.expression);
-            case 268 /* HeritageClause */:
+            case 268:
                 return visitNodes(cbNode, cbNodes, node.types);
-            case 207 /* ExpressionWithTypeArguments */:
+            case 207:
                 return visitNode(cbNode, node.expression) ||
                     visitNodes(cbNode, cbNodes, node.typeArguments);
-            case 254 /* ExternalModuleReference */:
+            case 254:
                 return visitNode(cbNode, node.expression);
-            case 253 /* MissingDeclaration */:
+            case 253:
                 return visitNodes(cbNode, cbNodes, node.decorators);
-            case 302 /* CommaListExpression */:
+            case 302:
                 return visitNodes(cbNode, cbNodes, node.elements);
-            case 255 /* JsxElement */:
+            case 255:
                 return visitNode(cbNode, node.openingElement) ||
                     visitNodes(cbNode, cbNodes, node.children) ||
                     visitNode(cbNode, node.closingElement);
-            case 259 /* JsxFragment */:
+            case 259:
                 return visitNode(cbNode, node.openingFragment) ||
                     visitNodes(cbNode, cbNodes, node.children) ||
                     visitNode(cbNode, node.closingFragment);
-            case 256 /* JsxSelfClosingElement */:
-            case 257 /* JsxOpeningElement */:
+            case 256:
+            case 257:
                 return visitNode(cbNode, node.tagName) ||
                     visitNodes(cbNode, cbNodes, node.typeArguments) ||
                     visitNode(cbNode, node.attributes);
-            case 263 /* JsxAttributes */:
+            case 263:
                 return visitNodes(cbNode, cbNodes, node.properties);
-            case 262 /* JsxAttribute */:
+            case 262:
                 return visitNode(cbNode, node.name) ||
                     visitNode(cbNode, node.initializer);
-            case 264 /* JsxSpreadAttribute */:
+            case 264:
                 return visitNode(cbNode, node.expression);
-            case 265 /* JsxExpression */:
+            case 265:
                 return visitNode(cbNode, node.dotDotDotToken) ||
                     visitNode(cbNode, node.expression);
-            case 258 /* JsxClosingElement */:
+            case 258:
                 return visitNode(cbNode, node.tagName);
-            case 278 /* JSDocTypeExpression */:
+            case 278:
                 return visitNode(cbNode, node.type);
-            case 282 /* JSDocNonNullableType */:
+            case 282:
                 return visitNode(cbNode, node.type);
-            case 281 /* JSDocNullableType */:
+            case 281:
                 return visitNode(cbNode, node.type);
-            case 283 /* JSDocOptionalType */:
+            case 283:
                 return visitNode(cbNode, node.type);
-            case 284 /* JSDocFunctionType */:
+            case 284:
                 return visitNodes(cbNode, cbNodes, node.parameters) ||
                     visitNode(cbNode, node.type);
-            case 285 /* JSDocVariadicType */:
+            case 285:
                 return visitNode(cbNode, node.type);
-            case 286 /* JSDocComment */:
+            case 286:
                 return visitNodes(cbNode, cbNodes, node.tags);
-            case 293 /* JSDocParameterTag */:
-            case 298 /* JSDocPropertyTag */:
+            case 293:
+            case 298:
                 if (node.isNameFirst) {
                     return visitNode(cbNode, node.name) ||
                         visitNode(cbNode, node.typeExpression);
@@ -15400,17 +12366,17 @@ var ts;
                     return visitNode(cbNode, node.typeExpression) ||
                         visitNode(cbNode, node.name);
                 }
-            case 294 /* JSDocReturnTag */:
+            case 294:
                 return visitNode(cbNode, node.typeExpression);
-            case 295 /* JSDocTypeTag */:
+            case 295:
                 return visitNode(cbNode, node.typeExpression);
-            case 290 /* JSDocAugmentsTag */:
+            case 290:
                 return visitNode(cbNode, node.class);
-            case 296 /* JSDocTemplateTag */:
+            case 296:
                 return visitNodes(cbNode, cbNodes, node.typeParameters);
-            case 297 /* JSDocTypedefTag */:
+            case 297:
                 if (node.typeExpression &&
-                    node.typeExpression.kind === 278 /* JSDocTypeExpression */) {
+                    node.typeExpression.kind === 278) {
                     return visitNode(cbNode, node.typeExpression) ||
                         visitNode(cbNode, node.fullName);
                 }
@@ -15418,16 +12384,16 @@ var ts;
                     return visitNode(cbNode, node.fullName) ||
                         visitNode(cbNode, node.typeExpression);
                 }
-            case 292 /* JSDocCallbackTag */:
+            case 292:
                 return visitNode(cbNode, node.fullName) ||
                     visitNode(cbNode, node.typeExpression);
-            case 288 /* JSDocSignature */:
+            case 288:
                 return visitNodes(cbNode, cbNodes, node.decorators) ||
                     visitNodes(cbNode, cbNodes, node.modifiers) ||
                     visitNodes(cbNode, cbNodes, node.typeParameters) ||
                     visitNodes(cbNode, cbNodes, node.parameters) ||
                     visitNode(cbNode, node.type);
-            case 287 /* JSDocTypeLiteral */:
+            case 287:
                 if (node.jsDocPropertyTags) {
                     for (var _i = 0, _a = node.jsDocPropertyTags; _i < _a.length; _i++) {
                         var tag = _a[_i];
@@ -15435,7 +12401,7 @@ var ts;
                     }
                 }
                 return;
-            case 301 /* PartiallyEmittedExpression */:
+            case 301:
                 return visitNode(cbNode, node.expression);
         }
     }
@@ -15444,11 +12410,11 @@ var ts;
         if (setParentNodes === void 0) { setParentNodes = false; }
         ts.performance.mark("beforeParse");
         var result;
-        if (languageVersion === 100 /* JSON */) {
-            result = Parser.parseJsonText(fileName, sourceText, languageVersion, /*syntaxCursor*/ undefined, setParentNodes);
+        if (languageVersion === 100) {
+            result = Parser.parseJsonText(fileName, sourceText, languageVersion, undefined, setParentNodes);
         }
         else {
-            result = Parser.parseSourceFile(fileName, sourceText, languageVersion, /*syntaxCursor*/ undefined, setParentNodes, scriptKind);
+            result = Parser.parseSourceFile(fileName, sourceText, languageVersion, undefined, setParentNodes, scriptKind);
         }
         ts.performance.mark("afterParse");
         ts.performance.measure("Parse", "beforeParse", "afterParse");
@@ -15459,71 +12425,41 @@ var ts;
         return Parser.parseIsolatedEntityName(text, languageVersion);
     }
     ts.parseIsolatedEntityName = parseIsolatedEntityName;
-    /**
-     * Parse json text into SyntaxTree and return node and parse errors if any
-     * @param fileName
-     * @param sourceText
-     */
     function parseJsonText(fileName, sourceText) {
         return Parser.parseJsonText(fileName, sourceText);
     }
     ts.parseJsonText = parseJsonText;
-    // See also `isExternalOrCommonJsModule` in utilities.ts
     function isExternalModule(file) {
         return file.externalModuleIndicator !== undefined;
     }
     ts.isExternalModule = isExternalModule;
-    // Produces a new SourceFile for the 'newText' provided. The 'textChangeRange' parameter
-    // indicates what changed between the 'text' that this SourceFile has and the 'newText'.
-    // The SourceFile will be created with the compiler attempting to reuse as many nodes from
-    // this file as possible.
-    //
-    // Note: this function mutates nodes from this SourceFile. That means any existing nodes
-    // from this SourceFile that are being held onto may change as a result (including
-    // becoming detached from any SourceFile).  It is recommended that this SourceFile not
-    // be used once 'update' is called on it.
     function updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks) {
         if (aggressiveChecks === void 0) { aggressiveChecks = false; }
         var newSourceFile = IncrementalParser.updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks);
-        // Because new source file node is created, it may not have the flag PossiblyContainDynamicImport. This is the case if there is no new edit to add dynamic import.
-        // We will manually port the flag to the new source file.
-        newSourceFile.flags |= (sourceFile.flags & 1572864 /* PermanentlySetIncrementalFlags */);
+        newSourceFile.flags |= (sourceFile.flags & 1572864);
         return newSourceFile;
     }
     ts.updateSourceFile = updateSourceFile;
-    /* @internal */
     function parseIsolatedJSDocComment(content, start, length) {
         var result = Parser.JSDocParser.parseIsolatedJSDocComment(content, start, length);
         if (result && result.jsDoc) {
-            // because the jsDocComment was parsed out of the source file, it might
-            // not be covered by the fixupParentReferences.
             Parser.fixupParentReferences(result.jsDoc);
         }
         return result;
     }
     ts.parseIsolatedJSDocComment = parseIsolatedJSDocComment;
-    /* @internal */
-    // Exposed only for testing.
     function parseJSDocTypeExpressionForTests(content, start, length) {
         return Parser.JSDocParser.parseJSDocTypeExpressionForTests(content, start, length);
     }
     ts.parseJSDocTypeExpressionForTests = parseJSDocTypeExpressionForTests;
-    // Implement the parser as a singleton module.  We do this for perf reasons because creating
-    // parser instances can actually be expensive enough to impact us on projects with many source
-    // files.
     var Parser;
     (function (Parser) {
-        // Share a single scanner across all calls to parse a source file.  This helps speed things
-        // up by avoiding the cost of creating/compiling scanners over and over again.
-        var scanner = ts.createScanner(6 /* Latest */, /*skipTrivia*/ true);
-        var disallowInAndDecoratorContext = 2048 /* DisallowInContext */ | 8192 /* DecoratorContext */;
-        // capture constructors in 'initializeState' to avoid null checks
-        // tslint:disable variable-name
+        var scanner = ts.createScanner(6, true);
+        var disallowInAndDecoratorContext = 2048 | 8192;
         var NodeConstructor;
         var TokenConstructor;
         var IdentifierConstructor;
         var SourceFileConstructor;
-        // tslint:enable variable-name
         var sourceFile;
         var parseDiagnostics;
         var syntaxCursor;
@@ -15533,87 +12469,14 @@ var ts;
         var identifiers;
         var identifierCount;
         var parsingContext;
-        // Flags that dictate what parsing context we're in.  For example:
-        // Whether or not we are in strict parsing mode.  All that changes in strict parsing mode is
-        // that some tokens that would be considered identifiers may be considered keywords.
-        //
-        // When adding more parser context flags, consider which is the more common case that the
-        // flag will be in.  This should be the 'false' state for that flag.  The reason for this is
-        // that we don't store data in our nodes unless the value is in the *non-default* state.  So,
-        // for example, more often than code 'allows-in' (or doesn't 'disallow-in').  We opt for
-        // 'disallow-in' set to 'false'.  Otherwise, if we had 'allowsIn' set to 'true', then almost
-        // all nodes would need extra state on them to store this info.
-        //
-        // Note: 'allowIn' and 'allowYield' track 1:1 with the [in] and [yield] concepts in the ES6
-        // grammar specification.
-        //
-        // An important thing about these context concepts.  By default they are effectively inherited
-        // while parsing through every grammar production.  i.e. if you don't change them, then when
-        // you parse a sub-production, it will have the same context values as the parent production.
-        // This is great most of the time.  After all, consider all the 'expression' grammar productions
-        // and how nearly all of them pass along the 'in' and 'yield' context values:
-        //
-        // EqualityExpression[In, Yield] :
-        //      RelationalExpression[?In, ?Yield]
-        //      EqualityExpression[?In, ?Yield] == RelationalExpression[?In, ?Yield]
-        //      EqualityExpression[?In, ?Yield] != RelationalExpression[?In, ?Yield]
-        //      EqualityExpression[?In, ?Yield] === RelationalExpression[?In, ?Yield]
-        //      EqualityExpression[?In, ?Yield] !== RelationalExpression[?In, ?Yield]
-        //
-        // Where you have to be careful is then understanding what the points are in the grammar
-        // where the values are *not* passed along.  For example:
-        //
-        // SingleNameBinding[Yield,GeneratorParameter]
-        //      [+GeneratorParameter]BindingIdentifier[Yield] Initializer[In]opt
-        //      [~GeneratorParameter]BindingIdentifier[?Yield]Initializer[In, ?Yield]opt
-        //
-        // Here this is saying that if the GeneratorParameter context flag is set, that we should
-        // explicitly set the 'yield' context flag to false before calling into the BindingIdentifier
-        // and we should explicitly unset the 'yield' context flag before calling into the Initializer.
-        // production.  Conversely, if the GeneratorParameter context flag is not set, then we
-        // should leave the 'yield' context flag alone.
-        //
-        // Getting this all correct is tricky and requires careful reading of the grammar to
-        // understand when these values should be changed versus when they should be inherited.
-        //
-        // Note: it should not be necessary to save/restore these flags during speculative/lookahead
-        // parsing.  These context flags are naturally stored and restored through normal recursive
-        // descent parsing and unwinding.
         var contextFlags;
-        // Whether or not we've had a parse error since creating the last AST node.  If we have
-        // encountered an error, it will be stored on the next AST node we create.  Parse errors
-        // can be broken down into three categories:
-        //
-        // 1) An error that occurred during scanning.  For example, an unterminated literal, or a
-        //    character that was completely not understood.
-        //
-        // 2) A token was expected, but was not present.  This type of error is commonly produced
-        //    by the 'parseExpected' function.
-        //
-        // 3) A token was present that no parsing function was able to consume.  This type of error
-        //    only occurs in the 'abortParsingListOrMoveToNextToken' function when the parser
-        //    decides to skip the token.
-        //
-        // In all of these cases, we want to mark the next node as having had an error before it.
-        // With this mark, we can know in incremental settings if this node can be reused, or if
-        // we have to reparse it.  If we don't keep this information around, we may just reuse the
-        // node.  in that event we would then not produce the same errors as we did before, causing
-        // significant confusion problems.
-        //
-        // Note: it is necessary that this value be saved/restored during speculative/lookahead
-        // parsing.  During lookahead parsing, we will often create a node.  That node will have
-        // this value attached, and then this value will be set back to 'false'.  If we decide to
-        // rewind, we must get back to the same value we had prior to the lookahead.
-        //
-        // Note: any errors at the end of the file that do not precede a regular node, should get
-        // attached to the EOF token.
         var parseErrorBeforeNextFinishedNode = false;
         function parseSourceFile(fileName, sourceText, languageVersion, syntaxCursor, setParentNodes, scriptKind) {
             if (setParentNodes === void 0) { setParentNodes = false; }
             scriptKind = ts.ensureScriptKind(fileName, scriptKind);
-            if (scriptKind === 6 /* JSON */) {
+            if (scriptKind === 6) {
                 var result_1 = parseJsonText(fileName, sourceText, languageVersion, syntaxCursor, setParentNodes);
-                ts.convertToObjectWorker(result_1, result_1.parseDiagnostics, /*returnValue*/ false, /*knownRootOptions*/ undefined, /*jsonConversionNotifier*/ undefined);
+                ts.convertToObjectWorker(result_1, result_1.parseDiagnostics, false, undefined, undefined);
                 result_1.typeReferenceDirectives = ts.emptyArray;
                 result_1.amdDependencies = ts.emptyArray;
                 return result_1;
@@ -15625,62 +12488,57 @@ var ts;
         }
         Parser.parseSourceFile = parseSourceFile;
         function parseIsolatedEntityName(content, languageVersion) {
-            // Choice of `isDeclarationFile` should be arbitrary
-            initializeState(content, languageVersion, /*syntaxCursor*/ undefined, 1 /* JS */);
-            // Prime the scanner.
+            initializeState(content, languageVersion, undefined, 1);
             nextToken();
-            var entityName = parseEntityName(/*allowReservedWords*/ true);
-            var isInvalid = token() === 1 /* EndOfFileToken */ && !parseDiagnostics.length;
+            var entityName = parseEntityName(true);
+            var isInvalid = token() === 1 && !parseDiagnostics.length;
             clearState();
             return isInvalid ? entityName : undefined;
         }
         Parser.parseIsolatedEntityName = parseIsolatedEntityName;
         function parseJsonText(fileName, sourceText, languageVersion, syntaxCursor, setParentNodes) {
-            if (languageVersion === void 0) { languageVersion = 2 /* ES2015 */; }
-            initializeState(sourceText, languageVersion, syntaxCursor, 6 /* JSON */);
-            // Set source file so that errors will be reported with this file name
-            sourceFile = createSourceFile(fileName, 2 /* ES2015 */, 6 /* JSON */, /*isDeclaration*/ false);
+            if (languageVersion === void 0) { languageVersion = 2; }
+            initializeState(sourceText, languageVersion, syntaxCursor, 6);
+            sourceFile = createSourceFile(fileName, 2, 6, false);
             sourceFile.flags = contextFlags;
-            // Prime the scanner.
             nextToken();
             var pos = getNodePos();
-            if (token() === 1 /* EndOfFileToken */) {
+            if (token() === 1) {
                 sourceFile.statements = createNodeArray([], pos, pos);
                 sourceFile.endOfFileToken = parseTokenNode();
             }
             else {
-                var statement = createNode(216 /* ExpressionStatement */);
+                var statement = createNode(216);
                 switch (token()) {
-                    case 21 /* OpenBracketToken */:
+                    case 21:
                         statement.expression = parseArrayLiteralExpression();
                         break;
-                    case 101 /* TrueKeyword */:
-                    case 86 /* FalseKeyword */:
-                    case 95 /* NullKeyword */:
+                    case 101:
+                    case 86:
+                    case 95:
                         statement.expression = parseTokenNode();
                         break;
-                    case 38 /* MinusToken */:
-                        if (lookAhead(function () { return nextToken() === 8 /* NumericLiteral */ && nextToken() !== 56 /* ColonToken */; })) {
+                    case 38:
+                        if (lookAhead(function () { return nextToken() === 8 && nextToken() !== 56; })) {
                             statement.expression = parsePrefixUnaryExpression();
                         }
                         else {
                             statement.expression = parseObjectLiteralExpression();
                         }
                         break;
-                    case 8 /* NumericLiteral */:
-                    case 9 /* StringLiteral */:
-                        if (lookAhead(function () { return nextToken() !== 56 /* ColonToken */; })) {
+                    case 8:
+                    case 9:
+                        if (lookAhead(function () { return nextToken() !== 56; })) {
                             statement.expression = parseLiteralNode();
                             break;
                         }
-                    // falls through
                     default:
                         statement.expression = parseObjectLiteralExpression();
                         break;
                 }
                 finishNode(statement);
                 sourceFile.statements = createNodeArray([statement], pos);
-                sourceFile.endOfFileToken = parseExpectedToken(1 /* EndOfFileToken */, ts.Diagnostics.Unexpected_token);
+                sourceFile.endOfFileToken = parseExpectedToken(1, ts.Diagnostics.Unexpected_token);
             }
             if (setParentNodes) {
                 fixupParentReferences(sourceFile);
@@ -15692,8 +12550,7 @@ var ts;
         }
         Parser.parseJsonText = parseJsonText;
         function getLanguageVariant(scriptKind) {
-            // .tsx and .jsx files are treated as jsx language variant.
-            return scriptKind === 4 /* TSX */ || scriptKind === 2 /* JSX */ || scriptKind === 1 /* JS */ || scriptKind === 6 /* JSON */ ? 1 /* JSX */ : 0 /* Standard */;
+            return scriptKind === 4 || scriptKind === 2 || scriptKind === 1 || scriptKind === 6 ? 1 : 0;
         }
         function initializeState(_sourceText, languageVersion, _syntaxCursor, scriptKind) {
             NodeConstructor = ts.objectAllocator.getNodeConstructor();
@@ -15708,29 +12565,26 @@ var ts;
             identifierCount = 0;
             nodeCount = 0;
             switch (scriptKind) {
-                case 1 /* JS */:
-                case 2 /* JSX */:
-                    contextFlags = 65536 /* JavaScriptFile */;
+                case 1:
+                case 2:
+                    contextFlags = 65536;
                     break;
-                case 6 /* JSON */:
-                    contextFlags = 65536 /* JavaScriptFile */ | 16777216 /* JsonFile */;
+                case 6:
+                    contextFlags = 65536 | 16777216;
                     break;
                 default:
-                    contextFlags = 0 /* None */;
+                    contextFlags = 0;
                     break;
             }
             parseErrorBeforeNextFinishedNode = false;
-            // Initialize and prime the scanner before parsing the source elements.
             scanner.setText(sourceText);
             scanner.setOnError(scanError);
             scanner.setScriptTarget(languageVersion);
             scanner.setLanguageVariant(getLanguageVariant(scriptKind));
         }
         function clearState() {
-            // Clear out the text the scanner is pointing at, so it doesn't keep anything alive unnecessarily.
             scanner.setText("");
             scanner.setOnError(undefined);
-            // Clear any data.  We don't want to accidentally hold onto it for too long.
             parseDiagnostics = undefined;
             sourceFile = undefined;
             identifiers = undefined;
@@ -15740,17 +12594,15 @@ var ts;
         function parseSourceFileWorker(fileName, languageVersion, setParentNodes, scriptKind) {
             var isDeclarationFile = isDeclarationFileName(fileName);
             if (isDeclarationFile) {
-                contextFlags |= 4194304 /* Ambient */;
+                contextFlags |= 4194304;
             }
             sourceFile = createSourceFile(fileName, languageVersion, scriptKind, isDeclarationFile);
             sourceFile.flags = contextFlags;
-            // Prime the scanner.
             nextToken();
-            // A member of ReadonlyArray<T> isn't assignable to a member of T[] (and prevents a direct cast) - but this is where we set up those members so they can be readonly in the future
             processCommentPragmas(sourceFile, sourceText);
             processPragmasIntoFields(sourceFile, reportPragmaDiagnostic);
-            sourceFile.statements = parseList(0 /* SourceElements */, parseStatement);
-            ts.Debug.assert(token() === 1 /* EndOfFileToken */);
+            sourceFile.statements = parseList(0, parseStatement);
+            ts.Debug.assert(token() === 1);
             sourceFile.endOfFileToken = addJSDocComment(parseTokenNode());
             setExternalModuleIndicator(sourceFile);
             sourceFile.nodeCount = nodeCount;
@@ -15776,17 +12628,10 @@ var ts;
             return node;
         }
         function fixupParentReferences(rootNode) {
-            // normally parent references are set during binding. However, for clients that only need
-            // a syntax tree, and no semantic features, then the binding process is an unnecessary
-            // overhead.  This functions allows us to set all the parents, without all the expense of
-            // binding.
             var parent = rootNode;
             forEachChild(rootNode, visitNode);
             return;
             function visitNode(n) {
-                // walk down setting parents that differ from the parent we think it should be.  This
-                // allows us to quickly bail out of setting parents for subtrees during incremental
-                // parsing
                 if (n.parent !== parent) {
                     n.parent = parent;
                     var saveParent = parent;
@@ -15806,9 +12651,7 @@ var ts;
         }
         Parser.fixupParentReferences = fixupParentReferences;
         function createSourceFile(fileName, languageVersion, scriptKind, isDeclarationFile) {
-            // code from createNode is inlined here so createNode won't have to deal with special case of creating source files
-            // this is quite rare comparing to other nodes and createNode should be as fast as possible
-            var sourceFile = new SourceFileConstructor(274 /* SourceFile */, /*pos*/ 0, /* end */ sourceText.length);
+            var sourceFile = new SourceFileConstructor(274, 0, sourceText.length);
             nodeCount++;
             sourceFile.text = sourceText;
             sourceFile.bindDiagnostics = [];
@@ -15829,102 +12672,81 @@ var ts;
             }
         }
         function setDisallowInContext(val) {
-            setContextFlag(val, 2048 /* DisallowInContext */);
+            setContextFlag(val, 2048);
         }
         function setYieldContext(val) {
-            setContextFlag(val, 4096 /* YieldContext */);
+            setContextFlag(val, 4096);
         }
         function setDecoratorContext(val) {
-            setContextFlag(val, 8192 /* DecoratorContext */);
+            setContextFlag(val, 8192);
         }
         function setAwaitContext(val) {
-            setContextFlag(val, 16384 /* AwaitContext */);
+            setContextFlag(val, 16384);
         }
         function doOutsideOfContext(context, func) {
-            // contextFlagsToClear will contain only the context flags that are
-            // currently set that we need to temporarily clear
-            // We don't just blindly reset to the previous flags to ensure
-            // that we do not mutate cached flags for the incremental
-            // parser (ThisNodeHasError, ThisNodeOrAnySubNodesHasError, and
-            // HasAggregatedChildData).
             var contextFlagsToClear = context & contextFlags;
             if (contextFlagsToClear) {
-                // clear the requested context flags
-                setContextFlag(/*val*/ false, contextFlagsToClear);
+                setContextFlag(false, contextFlagsToClear);
                 var result = func();
-                // restore the context flags we just cleared
-                setContextFlag(/*val*/ true, contextFlagsToClear);
+                setContextFlag(true, contextFlagsToClear);
                 return result;
             }
-            // no need to do anything special as we are not in any of the requested contexts
             return func();
         }
         function doInsideOfContext(context, func) {
-            // contextFlagsToSet will contain only the context flags that
-            // are not currently set that we need to temporarily enable.
-            // We don't just blindly reset to the previous flags to ensure
-            // that we do not mutate cached flags for the incremental
-            // parser (ThisNodeHasError, ThisNodeOrAnySubNodesHasError, and
-            // HasAggregatedChildData).
             var contextFlagsToSet = context & ~contextFlags;
             if (contextFlagsToSet) {
-                // set the requested context flags
-                setContextFlag(/*val*/ true, contextFlagsToSet);
+                setContextFlag(true, contextFlagsToSet);
                 var result = func();
-                // reset the context flags we just set
-                setContextFlag(/*val*/ false, contextFlagsToSet);
+                setContextFlag(false, contextFlagsToSet);
                 return result;
             }
-            // no need to do anything special as we are already in all of the requested contexts
             return func();
         }
         function allowInAnd(func) {
-            return doOutsideOfContext(2048 /* DisallowInContext */, func);
+            return doOutsideOfContext(2048, func);
         }
         function disallowInAnd(func) {
-            return doInsideOfContext(2048 /* DisallowInContext */, func);
+            return doInsideOfContext(2048, func);
         }
         function doInYieldContext(func) {
-            return doInsideOfContext(4096 /* YieldContext */, func);
+            return doInsideOfContext(4096, func);
         }
         function doInDecoratorContext(func) {
-            return doInsideOfContext(8192 /* DecoratorContext */, func);
+            return doInsideOfContext(8192, func);
         }
         function doInAwaitContext(func) {
-            return doInsideOfContext(16384 /* AwaitContext */, func);
+            return doInsideOfContext(16384, func);
         }
         function doOutsideOfAwaitContext(func) {
-            return doOutsideOfContext(16384 /* AwaitContext */, func);
+            return doOutsideOfContext(16384, func);
         }
         function doInYieldAndAwaitContext(func) {
-            return doInsideOfContext(4096 /* YieldContext */ | 16384 /* AwaitContext */, func);
+            return doInsideOfContext(4096 | 16384, func);
         }
         function inContext(flags) {
             return (contextFlags & flags) !== 0;
         }
         function inYieldContext() {
-            return inContext(4096 /* YieldContext */);
+            return inContext(4096);
         }
         function inDisallowInContext() {
-            return inContext(2048 /* DisallowInContext */);
+            return inContext(2048);
         }
         function inDecoratorContext() {
-            return inContext(8192 /* DecoratorContext */);
+            return inContext(8192);
         }
         function inAwaitContext() {
-            return inContext(16384 /* AwaitContext */);
+            return inContext(16384);
         }
         function parseErrorAtCurrentToken(message, arg0) {
             parseErrorAt(scanner.getTokenPos(), scanner.getTextPos(), message, arg0);
         }
         function parseErrorAtPosition(start, length, message, arg0) {
-            // Don't report another error if it would just be at the same position as the last error.
             var lastError = ts.lastOrUndefined(parseDiagnostics);
             if (!lastError || start !== lastError.start) {
                 parseDiagnostics.push(ts.createFileDiagnostic(sourceFile, start, length, message, arg0));
             }
-            // Mark that we've encountered an error.  We'll set an appropriate bit on the next
-            // node we finish so that it can't be reused incrementally.
             parseErrorBeforeNextFinishedNode = true;
         }
         function parseErrorAt(start, end, message, arg0) {
@@ -15939,12 +12761,6 @@ var ts;
         function getNodePos() {
             return scanner.getStartPos();
         }
-        // Use this function to access the current token instead of reading the currentToken
-        // variable. Since function results aren't narrowed in control flow analysis, this ensures
-        // that the type checker doesn't make wrong assumptions about the type of the current
-        // token (e.g. a call to nextToken() changes the current token but the checker doesn't
-        // reason about this side effect).  Mainstream VMs inline simple functions like this, so
-        // there is no performance penalty.
         function token() {
             return currentToken;
         }
@@ -15970,25 +12786,14 @@ var ts;
             return currentToken = scanner.scanJsxAttributeValue();
         }
         function speculationHelper(callback, isLookAhead) {
-            // Keep track of the state we'll need to rollback to if lookahead fails (or if the
-            // caller asked us to always reset our state).
             var saveToken = currentToken;
             var saveParseDiagnosticsLength = parseDiagnostics.length;
             var saveParseErrorBeforeNextFinishedNode = parseErrorBeforeNextFinishedNode;
-            // Note: it is not actually necessary to save/restore the context flags here.  That's
-            // because the saving/restoring of these flags happens naturally through the recursive
-            // descent nature of our parser.  However, we still store this here just so we can
-            // assert that invariant holds.
             var saveContextFlags = contextFlags;
-            // If we're only looking ahead, then tell the scanner to only lookahead as well.
-            // Otherwise, if we're actually speculatively parsing, then tell the scanner to do the
-            // same.
             var result = isLookAhead
                 ? scanner.lookAhead(callback)
                 : scanner.tryScan(callback);
             ts.Debug.assert(saveContextFlags === contextFlags);
-            // If our callback returned something 'falsy' or we're just looking ahead,
-            // then unconditionally restore us to where we were.
             if (!result || isLookAhead) {
                 currentToken = saveToken;
                 parseDiagnostics.length = saveParseDiagnosticsLength;
@@ -15996,37 +12801,23 @@ var ts;
             }
             return result;
         }
-        /** Invokes the provided callback then unconditionally restores the parser to the state it
-         * was in immediately prior to invoking the callback.  The result of invoking the callback
-         * is returned from this function.
-         */
         function lookAhead(callback) {
-            return speculationHelper(callback, /*isLookAhead*/ true);
+            return speculationHelper(callback, true);
         }
-        /** Invokes the provided callback.  If the callback returns something falsy, then it restores
-         * the parser to the state it was in immediately prior to invoking the callback.  If the
-         * callback returns something truthy, then the parser state is not rolled back.  The result
-         * of invoking the callback is returned from this function.
-         */
         function tryParse(callback) {
-            return speculationHelper(callback, /*isLookAhead*/ false);
+            return speculationHelper(callback, false);
         }
-        // Ignore strict mode flag because we will report an error in type checker instead.
         function isIdentifier() {
-            if (token() === 71 /* Identifier */) {
+            if (token() === 71) {
                 return true;
             }
-            // If we have a 'yield' keyword, and we're in the [yield] context, then 'yield' is
-            // considered a keyword and is not an identifier.
-            if (token() === 116 /* YieldKeyword */ && inYieldContext()) {
+            if (token() === 116 && inYieldContext()) {
                 return false;
             }
-            // If we have a 'await' keyword, and we're in the [Await] context, then 'await' is
-            // considered a keyword and is not an identifier.
-            if (token() === 121 /* AwaitKeyword */ && inAwaitContext()) {
+            if (token() === 121 && inAwaitContext()) {
                 return false;
             }
-            return token() > 107 /* LastReservedWord */;
+            return token() > 107;
         }
         function parseExpected(kind, diagnosticMessage, shouldAdvance) {
             if (shouldAdvance === void 0) { shouldAdvance = true; }
@@ -16036,7 +12827,6 @@ var ts;
                 }
                 return true;
             }
-            // Report specific message if provided with one.  Otherwise, report generic fallback message.
             if (diagnosticMessage) {
                 parseErrorAtCurrentToken(diagnosticMessage);
             }
@@ -16060,7 +12850,7 @@ var ts;
         }
         function parseExpectedToken(t, diagnosticMessage, arg0) {
             return parseOptionalToken(t) ||
-                createMissingNode(t, /*reportAtCurrentPosition*/ false, diagnosticMessage || ts.Diagnostics._0_expected, arg0 || ts.tokenToString(t));
+                createMissingNode(t, false, diagnosticMessage || ts.Diagnostics._0_expected, arg0 || ts.tokenToString(t));
         }
         function parseTokenNode() {
             var node = createNode(token());
@@ -16068,43 +12858,37 @@ var ts;
             return finishNode(node);
         }
         function canParseSemicolon() {
-            // If there's a real semicolon, then we can always parse it out.
-            if (token() === 25 /* SemicolonToken */) {
+            if (token() === 25) {
                 return true;
             }
-            // We can parse out an optional semicolon in ASI cases in the following cases.
-            return token() === 18 /* CloseBraceToken */ || token() === 1 /* EndOfFileToken */ || scanner.hasPrecedingLineBreak();
+            return token() === 18 || token() === 1 || scanner.hasPrecedingLineBreak();
         }
         function parseSemicolon() {
             if (canParseSemicolon()) {
-                if (token() === 25 /* SemicolonToken */) {
-                    // consume the semicolon if it was explicitly provided.
+                if (token() === 25) {
                     nextToken();
                 }
                 return true;
             }
             else {
-                return parseExpected(25 /* SemicolonToken */);
+                return parseExpected(25);
             }
         }
         function createNode(kind, pos) {
             nodeCount++;
             var p = pos >= 0 ? pos : scanner.getStartPos();
-            return ts.isNodeKind(kind) || kind === 0 /* Unknown */ ? new NodeConstructor(kind, p, p) :
-                kind === 71 /* Identifier */ ? new IdentifierConstructor(kind, p, p) :
+            return ts.isNodeKind(kind) || kind === 0 ? new NodeConstructor(kind, p, p) :
+                kind === 71 ? new IdentifierConstructor(kind, p, p) :
                     new TokenConstructor(kind, p, p);
         }
         function createNodeWithJSDoc(kind, pos) {
             var node = createNode(kind, pos);
-            if (scanner.getTokenFlags() & 2 /* PrecedingJSDocComment */) {
+            if (scanner.getTokenFlags() & 2) {
                 addJSDocComment(node);
             }
             return node;
         }
         function createNodeArray(elements, pos, end) {
-            // Since the element list of a node array is typically created by starting with an empty array and
-            // repeatedly calling push(), the list may not have the optimal memory layout. We invoke slice() for
-            // small arrays (1 to 4 elements) to give the VM a chance to allocate an optimal representation.
             var length = elements.length;
             var array = (length >= 1 && length <= 4 ? elements.slice() : elements);
             array.pos = pos;
@@ -16116,12 +12900,9 @@ var ts;
             if (contextFlags) {
                 node.flags |= contextFlags;
             }
-            // Keep track on the node if we encountered an error while parsing it.  If we did, then
-            // we cannot reuse the node incrementally.  Once we've marked this node, clear out the
-            // flag so that we don't mark any subsequent nodes.
             if (parseErrorBeforeNextFinishedNode) {
                 parseErrorBeforeNextFinishedNode = false;
-                node.flags |= 32768 /* ThisNodeHasError */;
+                node.flags |= 32768;
             }
             return node;
         }
@@ -16133,7 +12914,7 @@ var ts;
                 parseErrorAtCurrentToken(diagnosticMessage, arg0);
             }
             var result = createNode(kind);
-            if (kind === 71 /* Identifier */) {
+            if (kind === 71) {
                 result.escapedText = "";
             }
             else if (ts.isLiteralKind(kind) || ts.isTemplateLiteralKind(kind)) {
@@ -16148,24 +12929,19 @@ var ts;
             }
             return identifier;
         }
-        // An identifier that starts with two underscores has an extra underscore character prepended to it to avoid issues
-        // with magic property names like '__proto__'. The 'identifiers' object is used to share a single string instance for
-        // each identifier in order to reduce memory consumption.
         function createIdentifier(isIdentifier, diagnosticMessage) {
             identifierCount++;
             if (isIdentifier) {
-                var node = createNode(71 /* Identifier */);
-                // Store original token kind if it is not just an Identifier so we can report appropriate error later in type checker
-                if (token() !== 71 /* Identifier */) {
+                var node = createNode(71);
+                if (token() !== 71) {
                     node.originalKeywordKind = token();
                 }
                 node.escapedText = ts.escapeLeadingUnderscores(internIdentifier(scanner.getTokenValue()));
                 nextToken();
                 return finishNode(node);
             }
-            // Only for end of file because the error gets reported incorrectly on embedded script tags.
-            var reportAtCurrentPosition = token() === 1 /* EndOfFileToken */;
-            return createMissingNode(71 /* Identifier */, reportAtCurrentPosition, diagnosticMessage || ts.Diagnostics.Identifier_expected);
+            var reportAtCurrentPosition = token() === 1;
+            return createMissingNode(71, reportAtCurrentPosition, diagnosticMessage || ts.Diagnostics.Identifier_expected);
         }
         function parseIdentifier(diagnosticMessage) {
             return createIdentifier(isIdentifier(), diagnosticMessage);
@@ -16175,34 +12951,28 @@ var ts;
         }
         function isLiteralPropertyName() {
             return ts.tokenIsIdentifierOrKeyword(token()) ||
-                token() === 9 /* StringLiteral */ ||
-                token() === 8 /* NumericLiteral */;
+                token() === 9 ||
+                token() === 8;
         }
         function parsePropertyNameWorker(allowComputedPropertyNames) {
-            if (token() === 9 /* StringLiteral */ || token() === 8 /* NumericLiteral */) {
+            if (token() === 9 || token() === 8) {
                 var node = parseLiteralNode();
                 node.text = internIdentifier(node.text);
                 return node;
             }
-            if (allowComputedPropertyNames && token() === 21 /* OpenBracketToken */) {
+            if (allowComputedPropertyNames && token() === 21) {
                 return parseComputedPropertyName();
             }
             return parseIdentifierName();
         }
         function parsePropertyName() {
-            return parsePropertyNameWorker(/*allowComputedPropertyNames*/ true);
+            return parsePropertyNameWorker(true);
         }
         function parseComputedPropertyName() {
-            // PropertyName [Yield]:
-            //      LiteralPropertyName
-            //      ComputedPropertyName[?Yield]
-            var node = createNode(147 /* ComputedPropertyName */);
-            parseExpected(21 /* OpenBracketToken */);
-            // We parse any expression (including a comma expression). But the grammar
-            // says that only an assignment expression is allowed, so the grammar checker
-            // will error if it sees a comma expression.
+            var node = createNode(147);
+            parseExpected(21);
             node.expression = allowInAnd(parseExpression);
-            parseExpected(22 /* CloseBracketToken */);
+            parseExpected(22);
             return finishNode(node);
         }
         function parseContextualModifier(t) {
@@ -16217,20 +12987,19 @@ var ts;
         }
         function nextTokenCanFollowModifier() {
             switch (token()) {
-                case 76 /* ConstKeyword */:
-                    // 'const' is only a modifier if followed by 'enum'.
-                    return nextToken() === 83 /* EnumKeyword */;
-                case 84 /* ExportKeyword */:
+                case 76:
+                    return nextToken() === 83;
+                case 84:
                     nextToken();
-                    if (token() === 79 /* DefaultKeyword */) {
+                    if (token() === 79) {
                         return lookAhead(nextTokenCanFollowDefaultKeyword);
                     }
-                    return token() !== 39 /* AsteriskToken */ && token() !== 118 /* AsKeyword */ && token() !== 17 /* OpenBraceToken */ && canFollowModifier();
-                case 79 /* DefaultKeyword */:
+                    return token() !== 39 && token() !== 118 && token() !== 17 && canFollowModifier();
+                case 79:
                     return nextTokenCanFollowDefaultKeyword();
-                case 115 /* StaticKeyword */:
-                case 125 /* GetKeyword */:
-                case 136 /* SetKeyword */:
+                case 115:
+                case 125:
+                case 136:
                     nextToken();
                     return canFollowModifier();
                 default:
@@ -16241,112 +13010,86 @@ var ts;
             return ts.isModifierKind(token()) && tryParse(nextTokenCanFollowModifier);
         }
         function canFollowModifier() {
-            return token() === 21 /* OpenBracketToken */
-                || token() === 17 /* OpenBraceToken */
-                || token() === 39 /* AsteriskToken */
-                || token() === 24 /* DotDotDotToken */
+            return token() === 21
+                || token() === 17
+                || token() === 39
+                || token() === 24
                 || isLiteralPropertyName();
         }
         function nextTokenCanFollowDefaultKeyword() {
             nextToken();
-            return token() === 75 /* ClassKeyword */ || token() === 89 /* FunctionKeyword */ ||
-                token() === 109 /* InterfaceKeyword */ ||
-                (token() === 117 /* AbstractKeyword */ && lookAhead(nextTokenIsClassKeywordOnSameLine)) ||
-                (token() === 120 /* AsyncKeyword */ && lookAhead(nextTokenIsFunctionKeywordOnSameLine));
+            return token() === 75 || token() === 89 ||
+                token() === 109 ||
+                (token() === 117 && lookAhead(nextTokenIsClassKeywordOnSameLine)) ||
+                (token() === 120 && lookAhead(nextTokenIsFunctionKeywordOnSameLine));
         }
-        // True if positioned at the start of a list element
         function isListElement(parsingContext, inErrorRecovery) {
             var node = currentNode(parsingContext);
             if (node) {
                 return true;
             }
             switch (parsingContext) {
-                case 0 /* SourceElements */:
-                case 1 /* BlockStatements */:
-                case 3 /* SwitchClauseStatements */:
-                    // If we're in error recovery, then we don't want to treat ';' as an empty statement.
-                    // The problem is that ';' can show up in far too many contexts, and if we see one
-                    // and assume it's a statement, then we may bail out inappropriately from whatever
-                    // we're parsing.  For example, if we have a semicolon in the middle of a class, then
-                    // we really don't want to assume the class is over and we're on a statement in the
-                    // outer module.  We just want to consume and move on.
-                    return !(token() === 25 /* SemicolonToken */ && inErrorRecovery) && isStartOfStatement();
-                case 2 /* SwitchClauses */:
-                    return token() === 73 /* CaseKeyword */ || token() === 79 /* DefaultKeyword */;
-                case 4 /* TypeMembers */:
+                case 0:
+                case 1:
+                case 3:
+                    return !(token() === 25 && inErrorRecovery) && isStartOfStatement();
+                case 2:
+                    return token() === 73 || token() === 79;
+                case 4:
                     return lookAhead(isTypeMemberStart);
-                case 5 /* ClassMembers */:
-                    // We allow semicolons as class elements (as specified by ES6) as long as we're
-                    // not in error recovery.  If we're in error recovery, we don't want an errant
-                    // semicolon to be treated as a class member (since they're almost always used
-                    // for statements.
-                    return lookAhead(isClassMemberStart) || (token() === 25 /* SemicolonToken */ && !inErrorRecovery);
-                case 6 /* EnumMembers */:
-                    // Include open bracket computed properties. This technically also lets in indexers,
-                    // which would be a candidate for improved error reporting.
-                    return token() === 21 /* OpenBracketToken */ || isLiteralPropertyName();
-                case 12 /* ObjectLiteralMembers */:
-                    return token() === 21 /* OpenBracketToken */ || token() === 39 /* AsteriskToken */ || token() === 24 /* DotDotDotToken */ || isLiteralPropertyName();
-                case 17 /* RestProperties */:
+                case 5:
+                    return lookAhead(isClassMemberStart) || (token() === 25 && !inErrorRecovery);
+                case 6:
+                    return token() === 21 || isLiteralPropertyName();
+                case 12:
+                    return token() === 21 || token() === 39 || token() === 24 || isLiteralPropertyName();
+                case 17:
                     return isLiteralPropertyName();
-                case 9 /* ObjectBindingElements */:
-                    return token() === 21 /* OpenBracketToken */ || token() === 24 /* DotDotDotToken */ || isLiteralPropertyName();
-                case 7 /* HeritageClauseElement */:
-                    // If we see `{ ... }` then only consume it as an expression if it is followed by `,` or `{`
-                    // That way we won't consume the body of a class in its heritage clause.
-                    if (token() === 17 /* OpenBraceToken */) {
+                case 9:
+                    return token() === 21 || token() === 24 || isLiteralPropertyName();
+                case 7:
+                    if (token() === 17) {
                         return lookAhead(isValidHeritageClauseObjectLiteral);
                     }
                     if (!inErrorRecovery) {
                         return isStartOfLeftHandSideExpression() && !isHeritageClauseExtendsOrImplementsKeyword();
                     }
                     else {
-                        // If we're in error recovery we tighten up what we're willing to match.
-                        // That way we don't treat something like "this" as a valid heritage clause
-                        // element during recovery.
                         return isIdentifier() && !isHeritageClauseExtendsOrImplementsKeyword();
                     }
-                case 8 /* VariableDeclarations */:
+                case 8:
                     return isIdentifierOrPattern();
-                case 10 /* ArrayBindingElements */:
-                    return token() === 26 /* CommaToken */ || token() === 24 /* DotDotDotToken */ || isIdentifierOrPattern();
-                case 18 /* TypeParameters */:
+                case 10:
+                    return token() === 26 || token() === 24 || isIdentifierOrPattern();
+                case 18:
                     return isIdentifier();
-                case 15 /* ArrayLiteralMembers */:
-                    if (token() === 26 /* CommaToken */) {
+                case 15:
+                    if (token() === 26) {
                         return true;
                     }
-                // falls through
-                case 11 /* ArgumentExpressions */:
-                    return token() === 24 /* DotDotDotToken */ || isStartOfExpression();
-                case 16 /* Parameters */:
+                case 11:
+                    return token() === 24 || isStartOfExpression();
+                case 16:
                     return isStartOfParameter();
-                case 19 /* TypeArguments */:
-                case 20 /* TupleElementTypes */:
-                    return token() === 26 /* CommaToken */ || isStartOfType();
-                case 21 /* HeritageClauses */:
+                case 19:
+                case 20:
+                    return token() === 26 || isStartOfType();
+                case 21:
                     return isHeritageClause();
-                case 22 /* ImportOrExportSpecifiers */:
+                case 22:
                     return ts.tokenIsIdentifierOrKeyword(token());
-                case 13 /* JsxAttributes */:
-                    return ts.tokenIsIdentifierOrKeyword(token()) || token() === 17 /* OpenBraceToken */;
-                case 14 /* JsxChildren */:
+                case 13:
+                    return ts.tokenIsIdentifierOrKeyword(token()) || token() === 17;
+                case 14:
                     return true;
             }
             return ts.Debug.fail("Non-exhaustive case in 'isListElement'.");
         }
         function isValidHeritageClauseObjectLiteral() {
-            ts.Debug.assert(token() === 17 /* OpenBraceToken */);
-            if (nextToken() === 18 /* CloseBraceToken */) {
-                // if we see "extends {}" then only treat the {} as what we're extending (and not
-                // the class body) if we have:
-                //
-                //      extends {} {
-                //      extends {},
-                //      extends {} extends
-                //      extends {} implements
+            ts.Debug.assert(token() === 17);
+            if (nextToken() === 18) {
                 var next = nextToken();
-                return next === 26 /* CommaToken */ || next === 17 /* OpenBraceToken */ || next === 85 /* ExtendsKeyword */ || next === 108 /* ImplementsKeyword */;
+                return next === 26 || next === 17 || next === 85 || next === 108;
             }
             return true;
         }
@@ -16363,8 +13106,8 @@ var ts;
             return ts.tokenIsIdentifierOrKeywordOrGreaterThan(token());
         }
         function isHeritageClauseExtendsOrImplementsKeyword() {
-            if (token() === 108 /* ImplementsKeyword */ ||
-                token() === 85 /* ExtendsKeyword */) {
+            if (token() === 108 ||
+                token() === 85) {
                 return lookAhead(nextTokenIsStartOfExpression);
             }
             return false;
@@ -16377,95 +13120,78 @@ var ts;
             nextToken();
             return isStartOfType();
         }
-        // True if positioned at a list terminator
         function isListTerminator(kind) {
-            if (token() === 1 /* EndOfFileToken */) {
-                // Being at the end of the file ends all lists.
+            if (token() === 1) {
                 return true;
             }
             switch (kind) {
-                case 1 /* BlockStatements */:
-                case 2 /* SwitchClauses */:
-                case 4 /* TypeMembers */:
-                case 5 /* ClassMembers */:
-                case 6 /* EnumMembers */:
-                case 12 /* ObjectLiteralMembers */:
-                case 9 /* ObjectBindingElements */:
-                case 22 /* ImportOrExportSpecifiers */:
-                    return token() === 18 /* CloseBraceToken */;
-                case 3 /* SwitchClauseStatements */:
-                    return token() === 18 /* CloseBraceToken */ || token() === 73 /* CaseKeyword */ || token() === 79 /* DefaultKeyword */;
-                case 7 /* HeritageClauseElement */:
-                    return token() === 17 /* OpenBraceToken */ || token() === 85 /* ExtendsKeyword */ || token() === 108 /* ImplementsKeyword */;
-                case 8 /* VariableDeclarations */:
+                case 1:
+                case 2:
+                case 4:
+                case 5:
+                case 6:
+                case 12:
+                case 9:
+                case 22:
+                    return token() === 18;
+                case 3:
+                    return token() === 18 || token() === 73 || token() === 79;
+                case 7:
+                    return token() === 17 || token() === 85 || token() === 108;
+                case 8:
                     return isVariableDeclaratorListTerminator();
-                case 18 /* TypeParameters */:
-                    // Tokens other than '>' are here for better error recovery
-                    return token() === 29 /* GreaterThanToken */ || token() === 19 /* OpenParenToken */ || token() === 17 /* OpenBraceToken */ || token() === 85 /* ExtendsKeyword */ || token() === 108 /* ImplementsKeyword */;
-                case 11 /* ArgumentExpressions */:
-                    // Tokens other than ')' are here for better error recovery
-                    return token() === 20 /* CloseParenToken */ || token() === 25 /* SemicolonToken */;
-                case 15 /* ArrayLiteralMembers */:
-                case 20 /* TupleElementTypes */:
-                case 10 /* ArrayBindingElements */:
-                    return token() === 22 /* CloseBracketToken */;
-                case 16 /* Parameters */:
-                case 17 /* RestProperties */:
-                    // Tokens other than ')' and ']' (the latter for index signatures) are here for better error recovery
-                    return token() === 20 /* CloseParenToken */ || token() === 22 /* CloseBracketToken */ /*|| token === SyntaxKind.OpenBraceToken*/;
-                case 19 /* TypeArguments */:
-                    // All other tokens should cause the type-argument to terminate except comma token
-                    return token() !== 26 /* CommaToken */;
-                case 21 /* HeritageClauses */:
-                    return token() === 17 /* OpenBraceToken */ || token() === 18 /* CloseBraceToken */;
-                case 13 /* JsxAttributes */:
-                    return token() === 29 /* GreaterThanToken */ || token() === 41 /* SlashToken */;
-                case 14 /* JsxChildren */:
-                    return token() === 27 /* LessThanToken */ && lookAhead(nextTokenIsSlash);
+                case 18:
+                    return token() === 29 || token() === 19 || token() === 17 || token() === 85 || token() === 108;
+                case 11:
+                    return token() === 20 || token() === 25;
+                case 15:
+                case 20:
+                case 10:
+                    return token() === 22;
+                case 16:
+                case 17:
+                    return token() === 20 || token() === 22;
+                case 19:
+                    return token() !== 26;
+                case 21:
+                    return token() === 17 || token() === 18;
+                case 13:
+                    return token() === 29 || token() === 41;
+                case 14:
+                    return token() === 27 && lookAhead(nextTokenIsSlash);
                 default:
                     return false;
             }
         }
         function isVariableDeclaratorListTerminator() {
-            // If we can consume a semicolon (either explicitly, or with ASI), then consider us done
-            // with parsing the list of variable declarators.
             if (canParseSemicolon()) {
                 return true;
             }
-            // in the case where we're parsing the variable declarator of a 'for-in' statement, we
-            // are done if we see an 'in' keyword in front of us. Same with for-of
             if (isInOrOfKeyword(token())) {
                 return true;
             }
-            // ERROR RECOVERY TWEAK:
-            // For better error recovery, if we see an '=>' then we just stop immediately.  We've got an
-            // arrow function here and it's going to be very unlikely that we'll resynchronize and get
-            // another variable declaration.
-            if (token() === 36 /* EqualsGreaterThanToken */) {
+            if (token() === 36) {
                 return true;
             }
-            // Keep trying to parse out variable declarators.
             return false;
         }
-        // True if positioned at element or terminator of the current list or any enclosing list
         function isInSomeParsingContext() {
-            for (var kind = 0; kind < 23 /* Count */; kind++) {
+            for (var kind = 0; kind < 23; kind++) {
                 if (parsingContext & (1 << kind)) {
-                    if (isListElement(kind, /*inErrorRecovery*/ true) || isListTerminator(kind)) {
+                    if (isListElement(kind, true) || isListTerminator(kind)) {
                         return true;
                     }
                 }
             }
             return false;
         }
-        // Parses a list of elements
         function parseList(kind, parseElement) {
             var saveParsingContext = parsingContext;
             parsingContext |= 1 << kind;
             var list = [];
             var listPos = getNodePos();
             while (!isListTerminator(kind)) {
-                if (isListElement(kind, /*inErrorRecovery*/ false)) {
+                if (isListElement(kind, false)) {
                     var element = parseListElement(kind, parseElement);
                     list.push(element);
                     continue;
@@ -16485,145 +13211,85 @@ var ts;
             return parseElement();
         }
         function currentNode(parsingContext) {
-            // If there is an outstanding parse error that we've encountered, but not attached to
-            // some node, then we cannot get a node from the old source tree.  This is because we
-            // want to mark the next node we encounter as being unusable.
-            //
-            // Note: This may be too conservative.  Perhaps we could reuse the node and set the bit
-            // on it (or its leftmost child) as having the error.  For now though, being conservative
-            // is nice and likely won't ever affect perf.
             if (parseErrorBeforeNextFinishedNode) {
                 return undefined;
             }
             if (!syntaxCursor) {
-                // if we don't have a cursor, we could never return a node from the old tree.
                 return undefined;
             }
             var node = syntaxCursor.currentNode(scanner.getStartPos());
-            // Can't reuse a missing node.
             if (ts.nodeIsMissing(node)) {
                 return undefined;
             }
-            // Can't reuse a node that intersected the change range.
             if (node.intersectsChange) {
                 return undefined;
             }
-            // Can't reuse a node that contains a parse error.  This is necessary so that we
-            // produce the same set of errors again.
             if (ts.containsParseError(node)) {
                 return undefined;
             }
-            // We can only reuse a node if it was parsed under the same strict mode that we're
-            // currently in.  i.e. if we originally parsed a node in non-strict mode, but then
-            // the user added 'using strict' at the top of the file, then we can't use that node
-            // again as the presence of strict mode may cause us to parse the tokens in the file
-            // differently.
-            //
-            // Note: we *can* reuse tokens when the strict mode changes.  That's because tokens
-            // are unaffected by strict mode.  It's just the parser will decide what to do with it
-            // differently depending on what mode it is in.
-            //
-            // This also applies to all our other context flags as well.
-            var nodeContextFlags = node.flags & 12679168 /* ContextFlags */;
+            var nodeContextFlags = node.flags & 12679168;
             if (nodeContextFlags !== contextFlags) {
                 return undefined;
             }
-            // Ok, we have a node that looks like it could be reused.  Now verify that it is valid
-            // in the current list parsing context that we're currently at.
             if (!canReuseNode(node, parsingContext)) {
                 return undefined;
             }
             if (node.jsDocCache) {
-                // jsDocCache may include tags from parent nodes, which might have been modified.
                 node.jsDocCache = undefined;
             }
             return node;
         }
         function consumeNode(node) {
-            // Move the scanner so it is after the node we just consumed.
             scanner.setTextPos(node.end);
             nextToken();
             return node;
         }
         function canReuseNode(node, parsingContext) {
             switch (parsingContext) {
-                case 5 /* ClassMembers */:
+                case 5:
                     return isReusableClassMember(node);
-                case 2 /* SwitchClauses */:
+                case 2:
                     return isReusableSwitchClause(node);
-                case 0 /* SourceElements */:
-                case 1 /* BlockStatements */:
-                case 3 /* SwitchClauseStatements */:
+                case 0:
+                case 1:
+                case 3:
                     return isReusableStatement(node);
-                case 6 /* EnumMembers */:
+                case 6:
                     return isReusableEnumMember(node);
-                case 4 /* TypeMembers */:
+                case 4:
                     return isReusableTypeMember(node);
-                case 8 /* VariableDeclarations */:
+                case 8:
                     return isReusableVariableDeclaration(node);
-                case 16 /* Parameters */:
+                case 16:
                     return isReusableParameter(node);
-                case 17 /* RestProperties */:
+                case 17:
                     return false;
-                // Any other lists we do not care about reusing nodes in.  But feel free to add if
-                // you can do so safely.  Danger areas involve nodes that may involve speculative
-                // parsing.  If speculative parsing is involved with the node, then the range the
-                // parser reached while looking ahead might be in the edited range (see the example
-                // in canReuseVariableDeclaratorNode for a good case of this).
-                case 21 /* HeritageClauses */:
-                // This would probably be safe to reuse.  There is no speculative parsing with
-                // heritage clauses.
-                case 18 /* TypeParameters */:
-                // This would probably be safe to reuse.  There is no speculative parsing with
-                // type parameters.  Note that that's because type *parameters* only occur in
-                // unambiguous *type* contexts.  While type *arguments* occur in very ambiguous
-                // *expression* contexts.
-                case 20 /* TupleElementTypes */:
-                // This would probably be safe to reuse.  There is no speculative parsing with
-                // tuple types.
-                // Technically, type argument list types are probably safe to reuse.  While
-                // speculative parsing is involved with them (since type argument lists are only
-                // produced from speculative parsing a < as a type argument list), we only have
-                // the types because speculative parsing succeeded.  Thus, the lookahead never
-                // went past the end of the list and rewound.
-                case 19 /* TypeArguments */:
-                // Note: these are almost certainly not safe to ever reuse.  Expressions commonly
-                // need a large amount of lookahead, and we should not reuse them as they may
-                // have actually intersected the edit.
-                case 11 /* ArgumentExpressions */:
-                // This is not safe to reuse for the same reason as the 'AssignmentExpression'
-                // cases.  i.e. a property assignment may end with an expression, and thus might
-                // have lookahead far beyond it's old node.
-                case 12 /* ObjectLiteralMembers */:
-                // This is probably not safe to reuse.  There can be speculative parsing with
-                // type names in a heritage clause.  There can be generic names in the type
-                // name list, and there can be left hand side expressions (which can have type
-                // arguments.)
-                case 7 /* HeritageClauseElement */:
-                // Perhaps safe to reuse, but it's unlikely we'd see more than a dozen attributes
-                // on any given element. Same for children.
-                case 13 /* JsxAttributes */:
-                case 14 /* JsxChildren */:
+                case 21:
+                case 18:
+                case 20:
+                case 19:
+                case 11:
+                case 12:
+                case 7:
+                case 13:
+                case 14:
             }
             return false;
         }
         function isReusableClassMember(node) {
             if (node) {
                 switch (node.kind) {
-                    case 155 /* Constructor */:
-                    case 160 /* IndexSignature */:
-                    case 156 /* GetAccessor */:
-                    case 157 /* SetAccessor */:
-                    case 152 /* PropertyDeclaration */:
-                    case 212 /* SemicolonClassElement */:
+                    case 155:
+                    case 160:
+                    case 156:
+                    case 157:
+                    case 152:
+                    case 212:
                         return true;
-                    case 154 /* MethodDeclaration */:
-                        // Method declarations are not necessarily reusable.  An object-literal
-                        // may have a method calls "constructor(...)" and we must reparse that
-                        // into an actual .ConstructorDeclaration.
+                    case 154:
                         var methodDeclaration = node;
-                        var nameIsConstructor = methodDeclaration.name.kind === 71 /* Identifier */ &&
-                            methodDeclaration.name.originalKeywordKind === 123 /* ConstructorKeyword */;
+                        var nameIsConstructor = methodDeclaration.name.kind === 71 &&
+                            methodDeclaration.name.originalKeywordKind === 123;
                         return !nameIsConstructor;
                 }
             }
@@ -16632,8 +13298,8 @@ var ts;
         function isReusableSwitchClause(node) {
             if (node) {
                 switch (node.kind) {
-                    case 266 /* CaseClause */:
-                    case 267 /* DefaultClause */:
+                    case 266:
+                    case 267:
                         return true;
                 }
             }
@@ -16642,86 +13308,70 @@ var ts;
         function isReusableStatement(node) {
             if (node) {
                 switch (node.kind) {
-                    case 234 /* FunctionDeclaration */:
-                    case 214 /* VariableStatement */:
-                    case 213 /* Block */:
-                    case 217 /* IfStatement */:
-                    case 216 /* ExpressionStatement */:
-                    case 229 /* ThrowStatement */:
-                    case 225 /* ReturnStatement */:
-                    case 227 /* SwitchStatement */:
-                    case 224 /* BreakStatement */:
-                    case 223 /* ContinueStatement */:
-                    case 221 /* ForInStatement */:
-                    case 222 /* ForOfStatement */:
-                    case 220 /* ForStatement */:
-                    case 219 /* WhileStatement */:
-                    case 226 /* WithStatement */:
-                    case 215 /* EmptyStatement */:
-                    case 230 /* TryStatement */:
-                    case 228 /* LabeledStatement */:
-                    case 218 /* DoStatement */:
-                    case 231 /* DebuggerStatement */:
-                    case 244 /* ImportDeclaration */:
-                    case 243 /* ImportEqualsDeclaration */:
-                    case 250 /* ExportDeclaration */:
-                    case 249 /* ExportAssignment */:
-                    case 239 /* ModuleDeclaration */:
-                    case 235 /* ClassDeclaration */:
-                    case 236 /* InterfaceDeclaration */:
-                    case 238 /* EnumDeclaration */:
-                    case 237 /* TypeAliasDeclaration */:
+                    case 234:
+                    case 214:
+                    case 213:
+                    case 217:
+                    case 216:
+                    case 229:
+                    case 225:
+                    case 227:
+                    case 224:
+                    case 223:
+                    case 221:
+                    case 222:
+                    case 220:
+                    case 219:
+                    case 226:
+                    case 215:
+                    case 230:
+                    case 228:
+                    case 218:
+                    case 231:
+                    case 244:
+                    case 243:
+                    case 250:
+                    case 249:
+                    case 239:
+                    case 235:
+                    case 236:
+                    case 238:
+                    case 237:
                         return true;
                 }
             }
             return false;
         }
         function isReusableEnumMember(node) {
-            return node.kind === 273 /* EnumMember */;
+            return node.kind === 273;
         }
         function isReusableTypeMember(node) {
             if (node) {
                 switch (node.kind) {
-                    case 159 /* ConstructSignature */:
-                    case 153 /* MethodSignature */:
-                    case 160 /* IndexSignature */:
-                    case 151 /* PropertySignature */:
-                    case 158 /* CallSignature */:
+                    case 159:
+                    case 153:
+                    case 160:
+                    case 151:
+                    case 158:
                         return true;
                 }
             }
             return false;
         }
         function isReusableVariableDeclaration(node) {
-            if (node.kind !== 232 /* VariableDeclaration */) {
+            if (node.kind !== 232) {
                 return false;
             }
-            // Very subtle incremental parsing bug.  Consider the following code:
-            //
-            //      let v = new List < A, B
-            //
-            // This is actually legal code.  It's a list of variable declarators "v = new List<A"
-            // on one side and "B" on the other. If you then change that to:
-            //
-            //      let v = new List < A, B >()
-            //
-            // then we have a problem.  "v = new List<A" doesn't intersect the change range, so we
-            // start reparsing at "B" and we completely fail to handle this properly.
-            //
-            // In order to prevent this, we do not allow a variable declarator to be reused if it
-            // has an initializer.
             var variableDeclarator = node;
             return variableDeclarator.initializer === undefined;
         }
         function isReusableParameter(node) {
-            if (node.kind !== 149 /* Parameter */) {
+            if (node.kind !== 149) {
                 return false;
             }
-            // See the comment in isReusableVariableDeclaration for why we do this.
             var parameter = node;
             return parameter.initializer === undefined;
         }
-        // Returns true if we should abort parsing.
         function abortParsingListOrMoveToNextToken(kind) {
             parseErrorAtCurrentToken(parsingContextErrors(kind));
             if (isInSomeParsingContext()) {
@@ -16732,68 +13382,55 @@ var ts;
         }
         function parsingContextErrors(context) {
             switch (context) {
-                case 0 /* SourceElements */: return ts.Diagnostics.Declaration_or_statement_expected;
-                case 1 /* BlockStatements */: return ts.Diagnostics.Declaration_or_statement_expected;
-                case 2 /* SwitchClauses */: return ts.Diagnostics.case_or_default_expected;
-                case 3 /* SwitchClauseStatements */: return ts.Diagnostics.Statement_expected;
-                case 17 /* RestProperties */: // fallthrough
-                case 4 /* TypeMembers */: return ts.Diagnostics.Property_or_signature_expected;
-                case 5 /* ClassMembers */: return ts.Diagnostics.Unexpected_token_A_constructor_method_accessor_or_property_was_expected;
-                case 6 /* EnumMembers */: return ts.Diagnostics.Enum_member_expected;
-                case 7 /* HeritageClauseElement */: return ts.Diagnostics.Expression_expected;
-                case 8 /* VariableDeclarations */: return ts.Diagnostics.Variable_declaration_expected;
-                case 9 /* ObjectBindingElements */: return ts.Diagnostics.Property_destructuring_pattern_expected;
-                case 10 /* ArrayBindingElements */: return ts.Diagnostics.Array_element_destructuring_pattern_expected;
-                case 11 /* ArgumentExpressions */: return ts.Diagnostics.Argument_expression_expected;
-                case 12 /* ObjectLiteralMembers */: return ts.Diagnostics.Property_assignment_expected;
-                case 15 /* ArrayLiteralMembers */: return ts.Diagnostics.Expression_or_comma_expected;
-                case 16 /* Parameters */: return ts.Diagnostics.Parameter_declaration_expected;
-                case 18 /* TypeParameters */: return ts.Diagnostics.Type_parameter_declaration_expected;
-                case 19 /* TypeArguments */: return ts.Diagnostics.Type_argument_expected;
-                case 20 /* TupleElementTypes */: return ts.Diagnostics.Type_expected;
-                case 21 /* HeritageClauses */: return ts.Diagnostics.Unexpected_token_expected;
-                case 22 /* ImportOrExportSpecifiers */: return ts.Diagnostics.Identifier_expected;
-                case 13 /* JsxAttributes */: return ts.Diagnostics.Identifier_expected;
-                case 14 /* JsxChildren */: return ts.Diagnostics.Identifier_expected;
-                default: return undefined; // TODO: GH#18217 `default: Debug.assertNever(context);`
-            }
-        }
-        // Parses a comma-delimited list of elements
+                case 0: return ts.Diagnostics.Declaration_or_statement_expected;
+                case 1: return ts.Diagnostics.Declaration_or_statement_expected;
+                case 2: return ts.Diagnostics.case_or_default_expected;
+                case 3: return ts.Diagnostics.Statement_expected;
+                case 17:
+                case 4: return ts.Diagnostics.Property_or_signature_expected;
+                case 5: return ts.Diagnostics.Unexpected_token_A_constructor_method_accessor_or_property_was_expected;
+                case 6: return ts.Diagnostics.Enum_member_expected;
+                case 7: return ts.Diagnostics.Expression_expected;
+                case 8: return ts.Diagnostics.Variable_declaration_expected;
+                case 9: return ts.Diagnostics.Property_destructuring_pattern_expected;
+                case 10: return ts.Diagnostics.Array_element_destructuring_pattern_expected;
+                case 11: return ts.Diagnostics.Argument_expression_expected;
+                case 12: return ts.Diagnostics.Property_assignment_expected;
+                case 15: return ts.Diagnostics.Expression_or_comma_expected;
+                case 16: return ts.Diagnostics.Parameter_declaration_expected;
+                case 18: return ts.Diagnostics.Type_parameter_declaration_expected;
+                case 19: return ts.Diagnostics.Type_argument_expected;
+                case 20: return ts.Diagnostics.Type_expected;
+                case 21: return ts.Diagnostics.Unexpected_token_expected;
+                case 22: return ts.Diagnostics.Identifier_expected;
+                case 13: return ts.Diagnostics.Identifier_expected;
+                case 14: return ts.Diagnostics.Identifier_expected;
+                default: return undefined;
+            }
+        }
         function parseDelimitedList(kind, parseElement, considerSemicolonAsDelimiter) {
             var saveParsingContext = parsingContext;
             parsingContext |= 1 << kind;
             var list = [];
             var listPos = getNodePos();
-            var commaStart = -1; // Meaning the previous token was not a comma
+            var commaStart = -1;
             while (true) {
-                if (isListElement(kind, /*inErrorRecovery*/ false)) {
+                if (isListElement(kind, false)) {
                     var startPos = scanner.getStartPos();
                     list.push(parseListElement(kind, parseElement));
                     commaStart = scanner.getTokenPos();
-                    if (parseOptional(26 /* CommaToken */)) {
-                        // No need to check for a zero length node since we know we parsed a comma
+                    if (parseOptional(26)) {
                         continue;
                     }
-                    commaStart = -1; // Back to the state where the last token was not a comma
+                    commaStart = -1;
                     if (isListTerminator(kind)) {
                         break;
                     }
-                    // We didn't get a comma, and the list wasn't terminated, explicitly parse
-                    // out a comma so we give a good error message.
-                    parseExpected(26 /* CommaToken */);
-                    // If the token was a semicolon, and the caller allows that, then skip it and
-                    // continue.  This ensures we get back on track and don't result in tons of
-                    // parse errors.  For example, this can happen when people do things like use
-                    // a semicolon to delimit object literal members.   Note: we'll have already
-                    // reported an error when we called parseExpected above.
-                    if (considerSemicolonAsDelimiter && token() === 25 /* SemicolonToken */ && !scanner.hasPrecedingLineBreak()) {
+                    parseExpected(26);
+                    if (considerSemicolonAsDelimiter && token() === 25 && !scanner.hasPrecedingLineBreak()) {
                         nextToken();
                     }
                     if (startPos === scanner.getStartPos()) {
-                        // What we're parsing isn't actually remotely recognizable as a element and we've consumed no tokens whatsoever
-                        // Consume a token to advance the parser in some way and avoid an infinite loop
-                        // This can happen when we're speculatively parsing parenthesized expressions which we think may be arrow functions,
-                        // or when a modifier keyword which is disallowed as a parameter name (ie, `static` in strict mode) is supplied
                         nextToken();
                     }
                     continue;
@@ -16807,13 +13444,7 @@ var ts;
             }
             parsingContext = saveParsingContext;
             var result = createNodeArray(list, listPos);
-            // Recording the trailing comma is deliberately done after the previous
-            // loop, and not just if we see a list terminator. This is because the list
-            // may have ended incorrectly, but it is still important to know if there
-            // was a trailing comma.
-            // Check if the last token was a comma.
             if (commaStart >= 0) {
-                // Always preserve a trailing comma by marking it on the NodeArray
                 result.hasTrailingComma = true;
             }
             return result;
@@ -16832,9 +13463,8 @@ var ts;
         function parseEntityName(allowReservedWords, diagnosticMessage) {
             var entity = allowReservedWords ? parseIdentifierName(diagnosticMessage) : parseIdentifier(diagnosticMessage);
             var dotPos = scanner.getStartPos();
-            while (parseOptional(23 /* DotToken */)) {
-                if (token() === 27 /* LessThanToken */) {
-                    // the entity is part of a JSDoc-style generic, so record the trailing dot for later error reporting
+            while (parseOptional(23)) {
+                if (token() === 27) {
                     entity.jsdocDotPos = dotPos;
                     break;
                 }
@@ -16844,64 +13474,42 @@ var ts;
             return entity;
         }
         function createQualifiedName(entity, name) {
-            var node = createNode(146 /* QualifiedName */, entity.pos);
+            var node = createNode(146, entity.pos);
             node.left = entity;
             node.right = name;
             return finishNode(node);
         }
         function parseRightSideOfDot(allowIdentifierNames) {
-            // Technically a keyword is valid here as all identifiers and keywords are identifier names.
-            // However, often we'll encounter this in error situations when the identifier or keyword
-            // is actually starting another valid construct.
-            //
-            // So, we check for the following specific case:
-            //
-            //      name.
-            //      identifierOrKeyword identifierNameOrKeyword
-            //
-            // Note: the newlines are important here.  For example, if that above code
-            // were rewritten into:
-            //
-            //      name.identifierOrKeyword
-            //      identifierNameOrKeyword
-            //
-            // Then we would consider it valid.  That's because ASI would take effect and
-            // the code would be implicitly: "name.identifierOrKeyword; identifierNameOrKeyword".
-            // In the first case though, ASI will not take effect because there is not a
-            // line terminator after the identifier or keyword.
             if (scanner.hasPrecedingLineBreak() && ts.tokenIsIdentifierOrKeyword(token())) {
                 var matchesPattern = lookAhead(nextTokenIsIdentifierOrKeywordOnSameLine);
                 if (matchesPattern) {
-                    // Report that we need an identifier.  However, report it right after the dot,
-                    // and not on the next token.  This is because the next token might actually
-                    // be an identifier and the error would be quite confusing.
-                    return createMissingNode(71 /* Identifier */, /*reportAtCurrentPosition*/ true, ts.Diagnostics.Identifier_expected);
+                    return createMissingNode(71, true, ts.Diagnostics.Identifier_expected);
                 }
             }
             return allowIdentifierNames ? parseIdentifierName() : parseIdentifier();
         }
         function parseTemplateExpression() {
-            var template = createNode(202 /* TemplateExpression */);
+            var template = createNode(202);
             template.head = parseTemplateHead();
-            ts.Debug.assert(template.head.kind === 14 /* TemplateHead */, "Template head has wrong token kind");
+            ts.Debug.assert(template.head.kind === 14, "Template head has wrong token kind");
             var list = [];
             var listPos = getNodePos();
             do {
                 list.push(parseTemplateSpan());
-            } while (ts.last(list).literal.kind === 15 /* TemplateMiddle */);
+            } while (ts.last(list).literal.kind === 15);
             template.templateSpans = createNodeArray(list, listPos);
             return finishNode(template);
         }
         function parseTemplateSpan() {
-            var span = createNode(211 /* TemplateSpan */);
+            var span = createNode(211);
             span.expression = allowInAnd(parseExpression);
             var literal;
-            if (token() === 18 /* CloseBraceToken */) {
+            if (token() === 18) {
                 reScanTemplateToken();
                 literal = parseTemplateMiddleOrTemplateTail();
             }
             else {
-                literal = parseExpectedToken(16 /* TemplateTail */, ts.Diagnostics._0_expected, ts.tokenToString(18 /* CloseBraceToken */));
+                literal = parseExpectedToken(16, ts.Diagnostics._0_expected, ts.tokenToString(18));
             }
             span.literal = literal;
             return finishNode(span);
@@ -16911,12 +13519,12 @@ var ts;
         }
         function parseTemplateHead() {
             var fragment = parseLiteralLikeNode(token());
-            ts.Debug.assert(fragment.kind === 14 /* TemplateHead */, "Template head has wrong token kind");
+            ts.Debug.assert(fragment.kind === 14, "Template head has wrong token kind");
             return fragment;
         }
         function parseTemplateMiddleOrTemplateTail() {
             var fragment = parseLiteralLikeNode(token());
-            ts.Debug.assert(fragment.kind === 15 /* TemplateMiddle */ || fragment.kind === 16 /* TemplateTail */, "Template fragment has wrong token kind");
+            ts.Debug.assert(fragment.kind === 15 || fragment.kind === 16, "Template fragment has wrong token kind");
             return fragment;
         }
         function parseLiteralLikeNode(kind) {
@@ -16929,40 +13537,31 @@ var ts;
             if (scanner.isUnterminated()) {
                 node.isUnterminated = true;
             }
-            // Octal literals are not allowed in strict mode or ES5
-            // Note that theoretically the following condition would hold true literals like 009,
-            // which is not octal.But because of how the scanner separates the tokens, we would
-            // never get a token like this. Instead, we would get 00 and 9 as two separate tokens.
-            // We also do not need to check for negatives because any prefix operator would be part of a
-            // parent unary expression.
-            if (node.kind === 8 /* NumericLiteral */) {
-                node.numericLiteralFlags = scanner.getTokenFlags() & 1008 /* NumericLiteralFlags */;
+            if (node.kind === 8) {
+                node.numericLiteralFlags = scanner.getTokenFlags() & 1008;
             }
             nextToken();
             finishNode(node);
             return node;
         }
-        // TYPES
         function parseTypeReference() {
-            var node = createNode(162 /* TypeReference */);
-            node.typeName = parseEntityName(/*allowReservedWords*/ true, ts.Diagnostics.Type_expected);
-            if (!scanner.hasPrecedingLineBreak() && token() === 27 /* LessThanToken */) {
-                node.typeArguments = parseBracketedList(19 /* TypeArguments */, parseType, 27 /* LessThanToken */, 29 /* GreaterThanToken */);
+            var node = createNode(162);
+            node.typeName = parseEntityName(true, ts.Diagnostics.Type_expected);
+            if (!scanner.hasPrecedingLineBreak() && token() === 27) {
+                node.typeArguments = parseBracketedList(19, parseType, 27, 29);
             }
             return finishNode(node);
         }
-        // If true, we should abort parsing an error function.
         function typeHasArrowFunctionBlockingParseError(node) {
             switch (node.kind) {
-                case 162 /* TypeReference */:
+                case 162:
                     return ts.nodeIsMissing(node.typeName);
-                case 163 /* FunctionType */:
-                case 164 /* ConstructorType */: {
+                case 163:
+                case 164: {
                     var _a = node, parameters = _a.parameters, type = _a.type;
-                    // parameters.pos === parameters.end only if we used parseMissingList, else should contain at least `()`
                     return parameters.pos === parameters.end || typeHasArrowFunctionBlockingParseError(type);
                 }
-                case 173 /* ParenthesizedType */:
+                case 173:
                     return typeHasArrowFunctionBlockingParseError(node.type);
                 default:
                     return false;
@@ -16970,20 +13569,20 @@ var ts;
         }
         function parseThisTypePredicate(lhs) {
             nextToken();
-            var node = createNode(161 /* TypePredicate */, lhs.pos);
+            var node = createNode(161, lhs.pos);
             node.parameterName = lhs;
             node.type = parseType();
             return finishNode(node);
         }
         function parseThisTypeNode() {
-            var node = createNode(174 /* ThisType */);
+            var node = createNode(174);
             nextToken();
             return finishNode(node);
         }
         function parseJSDocAllType(postFixEquals) {
-            var result = createNode(279 /* JSDocAllType */);
+            var result = createNode(279);
             if (postFixEquals) {
-                return createJSDocPostfixType(283 /* JSDocOptionalType */, result);
+                return createJSDocPostfixType(283, result);
             }
             else {
                 nextToken();
@@ -16991,162 +13590,127 @@ var ts;
             return finishNode(result);
         }
         function parseJSDocNonNullableType() {
-            var result = createNode(282 /* JSDocNonNullableType */);
+            var result = createNode(282);
             nextToken();
             result.type = parseNonArrayType();
             return finishNode(result);
         }
         function parseJSDocUnknownOrNullableType() {
             var pos = scanner.getStartPos();
-            // skip the ?
             nextToken();
-            // Need to lookahead to decide if this is a nullable or unknown type.
-            // Here are cases where we'll pick the unknown type:
-            //
-            //      Foo(?,
-            //      { a: ? }
-            //      Foo(?)
-            //      Foo<?>
-            //      Foo(?=
-            //      (?|
-            if (token() === 26 /* CommaToken */ ||
-                token() === 18 /* CloseBraceToken */ ||
-                token() === 20 /* CloseParenToken */ ||
-                token() === 29 /* GreaterThanToken */ ||
-                token() === 58 /* EqualsToken */ ||
-                token() === 49 /* BarToken */) {
-                var result = createNode(280 /* JSDocUnknownType */, pos);
+            if (token() === 26 ||
+                token() === 18 ||
+                token() === 20 ||
+                token() === 29 ||
+                token() === 58 ||
+                token() === 49) {
+                var result = createNode(280, pos);
                 return finishNode(result);
             }
             else {
-                var result = createNode(281 /* JSDocNullableType */, pos);
+                var result = createNode(281, pos);
                 result.type = parseType();
                 return finishNode(result);
             }
         }
         function parseJSDocFunctionType() {
             if (lookAhead(nextTokenIsOpenParen)) {
-                var result = createNodeWithJSDoc(284 /* JSDocFunctionType */);
+                var result = createNodeWithJSDoc(284);
                 nextToken();
-                fillSignature(56 /* ColonToken */, 4 /* Type */ | 32 /* JSDoc */, result);
+                fillSignature(56, 4 | 32, result);
                 return finishNode(result);
             }
-            var node = createNode(162 /* TypeReference */);
+            var node = createNode(162);
             node.typeName = parseIdentifierName();
             return finishNode(node);
         }
         function parseJSDocParameter() {
-            var parameter = createNode(149 /* Parameter */);
-            if (token() === 99 /* ThisKeyword */ || token() === 94 /* NewKeyword */) {
+            var parameter = createNode(149);
+            if (token() === 99 || token() === 94) {
                 parameter.name = parseIdentifierName();
-                parseExpected(56 /* ColonToken */);
+                parseExpected(56);
             }
             parameter.type = parseJSDocType();
             return finishNode(parameter);
         }
         function parseJSDocType() {
-            var dotdotdot = parseOptionalToken(24 /* DotDotDotToken */);
+            var dotdotdot = parseOptionalToken(24);
             var type = parseType();
             if (dotdotdot) {
-                var variadic = createNode(285 /* JSDocVariadicType */, dotdotdot.pos);
+                var variadic = createNode(285, dotdotdot.pos);
                 variadic.type = type;
                 type = finishNode(variadic);
             }
-            if (token() === 58 /* EqualsToken */) {
-                return createJSDocPostfixType(283 /* JSDocOptionalType */, type);
+            if (token() === 58) {
+                return createJSDocPostfixType(283, type);
             }
             return type;
         }
         function parseTypeQuery() {
-            var node = createNode(165 /* TypeQuery */);
-            parseExpected(103 /* TypeOfKeyword */);
-            node.exprName = parseEntityName(/*allowReservedWords*/ true);
+            var node = createNode(165);
+            parseExpected(103);
+            node.exprName = parseEntityName(true);
             return finishNode(node);
         }
         function parseTypeParameter() {
-            var node = createNode(148 /* TypeParameter */);
+            var node = createNode(148);
             node.name = parseIdentifier();
-            if (parseOptional(85 /* ExtendsKeyword */)) {
-                // It's not uncommon for people to write improper constraints to a generic.  If the
-                // user writes a constraint that is an expression and not an actual type, then parse
-                // it out as an expression (so we can recover well), but report that a type is needed
-                // instead.
+            if (parseOptional(85)) {
                 if (isStartOfType() || !isStartOfExpression()) {
                     node.constraint = parseType();
                 }
                 else {
-                    // It was not a type, and it looked like an expression.  Parse out an expression
-                    // here so we recover well.  Note: it is important that we call parseUnaryExpression
-                    // and not parseExpression here.  If the user has:
-                    //
-                    //      <T extends "">
-                    //
-                    // We do *not* want to consume the `>` as we're consuming the expression for "".
                     node.expression = parseUnaryExpressionOrHigher();
                 }
             }
-            if (parseOptional(58 /* EqualsToken */)) {
+            if (parseOptional(58)) {
                 node.default = parseType();
             }
             return finishNode(node);
         }
         function parseTypeParameters() {
-            if (token() === 27 /* LessThanToken */) {
-                return parseBracketedList(18 /* TypeParameters */, parseTypeParameter, 27 /* LessThanToken */, 29 /* GreaterThanToken */);
+            if (token() === 27) {
+                return parseBracketedList(18, parseTypeParameter, 27, 29);
             }
         }
         function parseParameterType() {
-            if (parseOptional(56 /* ColonToken */)) {
+            if (parseOptional(56)) {
                 return parseType();
             }
             return undefined;
         }
         function isStartOfParameter() {
-            return token() === 24 /* DotDotDotToken */ ||
+            return token() === 24 ||
                 isIdentifierOrPattern() ||
                 ts.isModifierKind(token()) ||
-                token() === 57 /* AtToken */ ||
-                isStartOfType(/*inStartOfParameter*/ true);
+                token() === 57 ||
+                isStartOfType(true);
         }
         function parseParameter() {
-            var node = createNodeWithJSDoc(149 /* Parameter */);
-            if (token() === 99 /* ThisKeyword */) {
-                node.name = createIdentifier(/*isIdentifier*/ true);
+            var node = createNodeWithJSDoc(149);
+            if (token() === 99) {
+                node.name = createIdentifier(true);
                 node.type = parseParameterType();
                 return finishNode(node);
             }
             node.decorators = parseDecorators();
             node.modifiers = parseModifiers();
-            node.dotDotDotToken = parseOptionalToken(24 /* DotDotDotToken */);
-            // FormalParameter [Yield,Await]:
-            //      BindingElement[?Yield,?Await]
+            node.dotDotDotToken = parseOptionalToken(24);
             node.name = parseIdentifierOrPattern();
             if (ts.getFullWidth(node.name) === 0 && !ts.hasModifiers(node) && ts.isModifierKind(token())) {
-                // in cases like
-                // 'use strict'
-                // function foo(static)
-                // isParameter('static') === true, because of isModifier('static')
-                // however 'static' is not a legal identifier in a strict mode.
-                // so result of this function will be ParameterDeclaration (flags = 0, name = missing, type = undefined, initializer = undefined)
-                // and current token will not change => parsing of the enclosing parameter list will last till the end of time (or OOM)
-                // to avoid this we'll advance cursor to the next token.
                 nextToken();
             }
-            node.questionToken = parseOptionalToken(55 /* QuestionToken */);
+            node.questionToken = parseOptionalToken(55);
             node.type = parseParameterType();
             node.initializer = parseInitializer();
             return finishNode(node);
         }
-        /**
-         * Note: If returnToken is EqualsGreaterThanToken, `signature.type` will always be defined.
-         * @returns If return type parsing succeeds
-         */
         function fillSignature(returnToken, flags, signature) {
-            if (!(flags & 32 /* JSDoc */)) {
+            if (!(flags & 32)) {
                 signature.typeParameters = parseTypeParameters();
             }
             var parametersParsedSuccessfully = parseParameterList(signature, flags);
-            if (shouldParseReturnType(returnToken, !!(flags & 4 /* Type */))) {
+            if (shouldParseReturnType(returnToken, !!(flags & 4))) {
                 signature.type = parseTypeOrTypePredicate();
                 if (typeHasArrowFunctionBlockingParseError(signature.type))
                     return false;
@@ -17154,89 +13718,55 @@ var ts;
             return parametersParsedSuccessfully;
         }
         function shouldParseReturnType(returnToken, isType) {
-            if (returnToken === 36 /* EqualsGreaterThanToken */) {
+            if (returnToken === 36) {
                 parseExpected(returnToken);
                 return true;
             }
-            else if (parseOptional(56 /* ColonToken */)) {
+            else if (parseOptional(56)) {
                 return true;
             }
-            else if (isType && token() === 36 /* EqualsGreaterThanToken */) {
-                // This is easy to get backward, especially in type contexts, so parse the type anyway
-                parseErrorAtCurrentToken(ts.Diagnostics._0_expected, ts.tokenToString(56 /* ColonToken */));
+            else if (isType && token() === 36) {
+                parseErrorAtCurrentToken(ts.Diagnostics._0_expected, ts.tokenToString(56));
                 nextToken();
                 return true;
             }
             return false;
         }
-        // Returns true on success.
         function parseParameterList(signature, flags) {
-            // FormalParameters [Yield,Await]: (modified)
-            //      [empty]
-            //      FormalParameterList[?Yield,Await]
-            //
-            // FormalParameter[Yield,Await]: (modified)
-            //      BindingElement[?Yield,Await]
-            //
-            // BindingElement [Yield,Await]: (modified)
-            //      SingleNameBinding[?Yield,?Await]
-            //      BindingPattern[?Yield,?Await]Initializer [In, ?Yield,?Await] opt
-            //
-            // SingleNameBinding [Yield,Await]:
-            //      BindingIdentifier[?Yield,?Await]Initializer [In, ?Yield,?Await] opt
-            if (!parseExpected(19 /* OpenParenToken */)) {
+            if (!parseExpected(19)) {
                 signature.parameters = createMissingList();
                 return false;
             }
             var savedYieldContext = inYieldContext();
             var savedAwaitContext = inAwaitContext();
-            setYieldContext(!!(flags & 1 /* Yield */));
-            setAwaitContext(!!(flags & 2 /* Await */));
-            signature.parameters = parseDelimitedList(16 /* Parameters */, flags & 32 /* JSDoc */ ? parseJSDocParameter : parseParameter);
+            setYieldContext(!!(flags & 1));
+            setAwaitContext(!!(flags & 2));
+            signature.parameters = parseDelimitedList(16, flags & 32 ? parseJSDocParameter : parseParameter);
             setYieldContext(savedYieldContext);
             setAwaitContext(savedAwaitContext);
-            return parseExpected(20 /* CloseParenToken */);
+            return parseExpected(20);
         }
         function parseTypeMemberSemicolon() {
-            // We allow type members to be separated by commas or (possibly ASI) semicolons.
-            // First check if it was a comma.  If so, we're done with the member.
-            if (parseOptional(26 /* CommaToken */)) {
+            if (parseOptional(26)) {
                 return;
             }
-            // Didn't have a comma.  We must have a (possible ASI) semicolon.
             parseSemicolon();
         }
         function parseSignatureMember(kind) {
             var node = createNodeWithJSDoc(kind);
-            if (kind === 159 /* ConstructSignature */) {
-                parseExpected(94 /* NewKeyword */);
+            if (kind === 159) {
+                parseExpected(94);
             }
-            fillSignature(56 /* ColonToken */, 4 /* Type */, node);
+            fillSignature(56, 4, node);
             parseTypeMemberSemicolon();
             return finishNode(node);
         }
         function isIndexSignature() {
-            return token() === 21 /* OpenBracketToken */ && lookAhead(isUnambiguouslyIndexSignature);
+            return token() === 21 && lookAhead(isUnambiguouslyIndexSignature);
         }
         function isUnambiguouslyIndexSignature() {
-            // The only allowed sequence is:
-            //
-            //   [id:
-            //
-            // However, for error recovery, we also check the following cases:
-            //
-            //   [...
-            //   [id,
-            //   [id?,
-            //   [id?:
-            //   [id?]
-            //   [public id
-            //   [private id
-            //   [protected id
-            //   []
-            //
             nextToken();
-            if (token() === 24 /* DotDotDotToken */ || token() === 22 /* CloseBracketToken */) {
+            if (token() === 24 || token() === 22) {
                 return true;
             }
             if (ts.isModifierKind(token())) {
@@ -17249,48 +13779,35 @@ var ts;
                 return false;
             }
             else {
-                // Skip the identifier
                 nextToken();
             }
-            // A colon signifies a well formed indexer
-            // A comma should be a badly formed indexer because comma expressions are not allowed
-            // in computed properties.
-            if (token() === 56 /* ColonToken */ || token() === 26 /* CommaToken */) {
+            if (token() === 56 || token() === 26) {
                 return true;
             }
-            // Question mark could be an indexer with an optional property,
-            // or it could be a conditional expression in a computed property.
-            if (token() !== 55 /* QuestionToken */) {
+            if (token() !== 55) {
                 return false;
             }
-            // If any of the following tokens are after the question mark, it cannot
-            // be a conditional expression, so treat it as an indexer.
             nextToken();
-            return token() === 56 /* ColonToken */ || token() === 26 /* CommaToken */ || token() === 22 /* CloseBracketToken */;
+            return token() === 56 || token() === 26 || token() === 22;
         }
         function parseIndexSignatureDeclaration(node) {
-            node.kind = 160 /* IndexSignature */;
-            node.parameters = parseBracketedList(16 /* Parameters */, parseParameter, 21 /* OpenBracketToken */, 22 /* CloseBracketToken */);
+            node.kind = 160;
+            node.parameters = parseBracketedList(16, parseParameter, 21, 22);
             node.type = parseTypeAnnotation();
             parseTypeMemberSemicolon();
             return finishNode(node);
         }
         function parsePropertyOrMethodSignature(node) {
             node.name = parsePropertyName();
-            node.questionToken = parseOptionalToken(55 /* QuestionToken */);
-            if (token() === 19 /* OpenParenToken */ || token() === 27 /* LessThanToken */) {
-                node.kind = 153 /* MethodSignature */;
-                // Method signatures don't exist in expression contexts.  So they have neither
-                // [Yield] nor [Await]
-                fillSignature(56 /* ColonToken */, 4 /* Type */, node);
+            node.questionToken = parseOptionalToken(55);
+            if (token() === 19 || token() === 27) {
+                node.kind = 153;
+                fillSignature(56, 4, node);
             }
             else {
-                node.kind = 151 /* PropertySignature */;
+                node.kind = 151;
                 node.type = parseTypeAnnotation();
-                if (token() === 58 /* EqualsToken */) {
-                    // Although type literal properties cannot not have initializers, we attempt
-                    // to parse an initializer so we can report in the checker that an interface
-                    // property or type literal property cannot have an initializer.
+                if (token() === 58) {
                     node.initializer = parseInitializer();
                 }
             }
@@ -17298,45 +13815,39 @@ var ts;
             return finishNode(node);
         }
         function isTypeMemberStart() {
-            // Return true if we have the start of a signature member
-            if (token() === 19 /* OpenParenToken */ || token() === 27 /* LessThanToken */) {
+            if (token() === 19 || token() === 27) {
                 return true;
             }
             var idToken = false;
-            // Eat up all modifiers, but hold on to the last one in case it is actually an identifier
             while (ts.isModifierKind(token())) {
                 idToken = true;
                 nextToken();
             }
-            // Index signatures and computed property names are type members
-            if (token() === 21 /* OpenBracketToken */) {
+            if (token() === 21) {
                 return true;
             }
-            // Try to get the first property-like token following all modifiers
             if (isLiteralPropertyName()) {
                 idToken = true;
                 nextToken();
             }
-            // If we were able to get any potential identifier, check that it is
-            // the start of a member declaration
             if (idToken) {
-                return token() === 19 /* OpenParenToken */ ||
-                    token() === 27 /* LessThanToken */ ||
-                    token() === 55 /* QuestionToken */ ||
-                    token() === 56 /* ColonToken */ ||
-                    token() === 26 /* CommaToken */ ||
+                return token() === 19 ||
+                    token() === 27 ||
+                    token() === 55 ||
+                    token() === 56 ||
+                    token() === 26 ||
                     canParseSemicolon();
             }
             return false;
         }
         function parseTypeMember() {
-            if (token() === 19 /* OpenParenToken */ || token() === 27 /* LessThanToken */) {
-                return parseSignatureMember(158 /* CallSignature */);
+            if (token() === 19 || token() === 27) {
+                return parseSignatureMember(158);
             }
-            if (token() === 94 /* NewKeyword */ && lookAhead(nextTokenIsOpenParenOrLessThan)) {
-                return parseSignatureMember(159 /* ConstructSignature */);
+            if (token() === 94 && lookAhead(nextTokenIsOpenParenOrLessThan)) {
+                return parseSignatureMember(159);
             }
-            var node = createNodeWithJSDoc(0 /* Unknown */);
+            var node = createNodeWithJSDoc(0);
             node.modifiers = parseModifiers();
             if (isIndexSignature()) {
                 return parseIndexSignatureDeclaration(node);
@@ -17345,30 +13856,30 @@ var ts;
         }
         function nextTokenIsOpenParenOrLessThan() {
             nextToken();
-            return token() === 19 /* OpenParenToken */ || token() === 27 /* LessThanToken */;
+            return token() === 19 || token() === 27;
         }
         function nextTokenIsDot() {
-            return nextToken() === 23 /* DotToken */;
+            return nextToken() === 23;
         }
         function nextTokenIsOpenParenOrLessThanOrDot() {
             switch (nextToken()) {
-                case 19 /* OpenParenToken */:
-                case 27 /* LessThanToken */:
-                case 23 /* DotToken */:
+                case 19:
+                case 27:
+                case 23:
                     return true;
             }
             return false;
         }
         function parseTypeLiteral() {
-            var node = createNode(166 /* TypeLiteral */);
+            var node = createNode(166);
             node.members = parseObjectTypeMembers();
             return finishNode(node);
         }
         function parseObjectTypeMembers() {
             var members;
-            if (parseExpected(17 /* OpenBraceToken */)) {
-                members = parseList(4 /* TypeMembers */, parseTypeMember);
-                parseExpected(18 /* CloseBraceToken */);
+            if (parseExpected(17)) {
+                members = parseList(4, parseTypeMember);
+                parseExpected(18);
             }
             else {
                 members = createMissingList();
@@ -17377,76 +13888,76 @@ var ts;
         }
         function isStartOfMappedType() {
             nextToken();
-            if (token() === 37 /* PlusToken */ || token() === 38 /* MinusToken */) {
-                return nextToken() === 132 /* ReadonlyKeyword */;
+            if (token() === 37 || token() === 38) {
+                return nextToken() === 132;
             }
-            if (token() === 132 /* ReadonlyKeyword */) {
+            if (token() === 132) {
                 nextToken();
             }
-            return token() === 21 /* OpenBracketToken */ && nextTokenIsIdentifier() && nextToken() === 92 /* InKeyword */;
+            return token() === 21 && nextTokenIsIdentifier() && nextToken() === 92;
         }
         function parseMappedTypeParameter() {
-            var node = createNode(148 /* TypeParameter */);
+            var node = createNode(148);
             node.name = parseIdentifier();
-            parseExpected(92 /* InKeyword */);
+            parseExpected(92);
             node.constraint = parseType();
             return finishNode(node);
         }
         function parseMappedType() {
-            var node = createNode(177 /* MappedType */);
-            parseExpected(17 /* OpenBraceToken */);
-            if (token() === 132 /* ReadonlyKeyword */ || token() === 37 /* PlusToken */ || token() === 38 /* MinusToken */) {
+            var node = createNode(177);
+            parseExpected(17);
+            if (token() === 132 || token() === 37 || token() === 38) {
                 node.readonlyToken = parseTokenNode();
-                if (node.readonlyToken.kind !== 132 /* ReadonlyKeyword */) {
-                    parseExpectedToken(132 /* ReadonlyKeyword */);
+                if (node.readonlyToken.kind !== 132) {
+                    parseExpectedToken(132);
                 }
             }
-            parseExpected(21 /* OpenBracketToken */);
+            parseExpected(21);
             node.typeParameter = parseMappedTypeParameter();
-            parseExpected(22 /* CloseBracketToken */);
-            if (token() === 55 /* QuestionToken */ || token() === 37 /* PlusToken */ || token() === 38 /* MinusToken */) {
+            parseExpected(22);
+            if (token() === 55 || token() === 37 || token() === 38) {
                 node.questionToken = parseTokenNode();
-                if (node.questionToken.kind !== 55 /* QuestionToken */) {
-                    parseExpectedToken(55 /* QuestionToken */);
+                if (node.questionToken.kind !== 55) {
+                    parseExpectedToken(55);
                 }
             }
             node.type = parseTypeAnnotation();
             parseSemicolon();
-            parseExpected(18 /* CloseBraceToken */);
+            parseExpected(18);
             return finishNode(node);
         }
         function parseTupleType() {
-            var node = createNode(168 /* TupleType */);
-            node.elementTypes = parseBracketedList(20 /* TupleElementTypes */, parseType, 21 /* OpenBracketToken */, 22 /* CloseBracketToken */);
+            var node = createNode(168);
+            node.elementTypes = parseBracketedList(20, parseType, 21, 22);
             return finishNode(node);
         }
         function parseParenthesizedType() {
-            var node = createNode(173 /* ParenthesizedType */);
-            parseExpected(19 /* OpenParenToken */);
+            var node = createNode(173);
+            parseExpected(19);
             node.type = parseType();
-            parseExpected(20 /* CloseParenToken */);
+            parseExpected(20);
             return finishNode(node);
         }
         function parseFunctionOrConstructorType() {
             var pos = getNodePos();
-            var kind = parseOptional(94 /* NewKeyword */) ? 164 /* ConstructorType */ : 163 /* FunctionType */;
+            var kind = parseOptional(94) ? 164 : 163;
             var node = createNodeWithJSDoc(kind, pos);
-            fillSignature(36 /* EqualsGreaterThanToken */, 4 /* Type */, node);
+            fillSignature(36, 4, node);
             return finishNode(node);
         }
         function parseKeywordAndNoDot() {
             var node = parseTokenNode();
-            return token() === 23 /* DotToken */ ? undefined : node;
+            return token() === 23 ? undefined : node;
         }
         function parseLiteralTypeNode(negative) {
-            var node = createNode(178 /* LiteralType */);
+            var node = createNode(178);
             var unaryMinusExpression;
             if (negative) {
-                unaryMinusExpression = createNode(198 /* PrefixUnaryExpression */);
-                unaryMinusExpression.operator = 38 /* MinusToken */;
+                unaryMinusExpression = createNode(198);
+                unaryMinusExpression.operator = 38;
                 nextToken();
             }
-            var expression = token() === 101 /* TrueKeyword */ || token() === 86 /* FalseKeyword */
+            var expression = token() === 101 || token() === 86
                 ? parseTokenNode()
                 : parseLiteralLikeNode(token());
             if (negative) {
@@ -17459,79 +13970,78 @@ var ts;
         }
         function isStartOfTypeOfImportType() {
             nextToken();
-            return token() === 91 /* ImportKeyword */;
+            return token() === 91;
         }
         function parseImportType() {
-            sourceFile.flags |= 524288 /* PossiblyContainsDynamicImport */;
-            var node = createNode(179 /* ImportType */);
-            if (parseOptional(103 /* TypeOfKeyword */)) {
+            sourceFile.flags |= 524288;
+            var node = createNode(179);
+            if (parseOptional(103)) {
                 node.isTypeOf = true;
             }
-            parseExpected(91 /* ImportKeyword */);
-            parseExpected(19 /* OpenParenToken */);
+            parseExpected(91);
+            parseExpected(19);
             node.argument = parseType();
-            parseExpected(20 /* CloseParenToken */);
-            if (parseOptional(23 /* DotToken */)) {
-                node.qualifier = parseEntityName(/*allowReservedWords*/ true, ts.Diagnostics.Type_expected);
+            parseExpected(20);
+            if (parseOptional(23)) {
+                node.qualifier = parseEntityName(true, ts.Diagnostics.Type_expected);
             }
             node.typeArguments = tryParseTypeArguments();
             return finishNode(node);
         }
         function nextTokenIsNumericLiteral() {
-            return nextToken() === 8 /* NumericLiteral */;
+            return nextToken() === 8;
         }
         function parseNonArrayType() {
             switch (token()) {
-                case 119 /* AnyKeyword */:
-                case 142 /* UnknownKeyword */:
-                case 137 /* StringKeyword */:
-                case 134 /* NumberKeyword */:
-                case 138 /* SymbolKeyword */:
-                case 122 /* BooleanKeyword */:
-                case 140 /* UndefinedKeyword */:
-                case 131 /* NeverKeyword */:
-                case 135 /* ObjectKeyword */:
-                    // If these are followed by a dot, then parse these out as a dotted type reference instead.
+                case 119:
+                case 142:
+                case 137:
+                case 134:
+                case 138:
+                case 122:
+                case 140:
+                case 131:
+                case 135:
                     return tryParse(parseKeywordAndNoDot) || parseTypeReference();
-                case 39 /* AsteriskToken */:
-                    return parseJSDocAllType(/*postfixEquals*/ false);
-                case 61 /* AsteriskEqualsToken */:
-                    return parseJSDocAllType(/*postfixEquals*/ true);
-                case 55 /* QuestionToken */:
+                case 39:
+                    return parseJSDocAllType(false);
+                case 61:
+                    return parseJSDocAllType(true);
+                case 55:
                     return parseJSDocUnknownOrNullableType();
-                case 89 /* FunctionKeyword */:
+                case 89:
                     return parseJSDocFunctionType();
-                case 51 /* ExclamationToken */:
+                case 51:
                     return parseJSDocNonNullableType();
-                case 13 /* NoSubstitutionTemplateLiteral */:
-                case 9 /* StringLiteral */:
-                case 8 /* NumericLiteral */:
-                case 101 /* TrueKeyword */:
-                case 86 /* FalseKeyword */:
+                case 13:
+                case 9:
+                case 8:
+                case 101:
+                case 86:
                     return parseLiteralTypeNode();
-                case 38 /* MinusToken */:
-                    return lookAhead(nextTokenIsNumericLiteral) ? parseLiteralTypeNode(/*negative*/ true) : parseTypeReference();
-                case 105 /* VoidKeyword */:
-                case 95 /* NullKeyword */:
+                case 38:
+                    return lookAhead(nextTokenIsNumericLiteral) ? parseLiteralTypeNode(true) : parseTypeReference();
+                case 105:
+                case 95:
                     return parseTokenNode();
-                case 99 /* ThisKeyword */: {
+                case 99: {
                     var thisKeyword = parseThisTypeNode();
-                    if (token() === 127 /* IsKeyword */ && !scanner.hasPrecedingLineBreak()) {
+                    if (token() === 127 && !scanner.hasPrecedingLineBreak()) {
                         return parseThisTypePredicate(thisKeyword);
                     }
                     else {
                         return thisKeyword;
                     }
                 }
-                case 103 /* TypeOfKeyword */:
+                case 103:
                     return lookAhead(isStartOfTypeOfImportType) ? parseImportType() : parseTypeQuery();
-                case 17 /* OpenBraceToken */:
+                case 17:
                     return lookAhead(isStartOfMappedType) ? parseMappedType() : parseTypeLiteral();
-                case 21 /* OpenBracketToken */:
+                case 21:
                     return parseTupleType();
-                case 19 /* OpenParenToken */:
+                case 19:
                     return parseParenthesizedType();
-                case 91 /* ImportKeyword */:
+                case 91:
                     return parseImportType();
                 default:
                     return parseTypeReference();
@@ -17539,42 +14049,40 @@ var ts;
         }
         function isStartOfType(inStartOfParameter) {
             switch (token()) {
-                case 119 /* AnyKeyword */:
-                case 142 /* UnknownKeyword */:
-                case 137 /* StringKeyword */:
-                case 134 /* NumberKeyword */:
-                case 122 /* BooleanKeyword */:
-                case 138 /* SymbolKeyword */:
-                case 141 /* UniqueKeyword */:
-                case 105 /* VoidKeyword */:
-                case 140 /* UndefinedKeyword */:
-                case 95 /* NullKeyword */:
-                case 99 /* ThisKeyword */:
-                case 103 /* TypeOfKeyword */:
-                case 131 /* NeverKeyword */:
-                case 17 /* OpenBraceToken */:
-                case 21 /* OpenBracketToken */:
-                case 27 /* LessThanToken */:
-                case 49 /* BarToken */:
-                case 48 /* AmpersandToken */:
-                case 94 /* NewKeyword */:
-                case 9 /* StringLiteral */:
-                case 8 /* NumericLiteral */:
-                case 101 /* TrueKeyword */:
-                case 86 /* FalseKeyword */:
-                case 135 /* ObjectKeyword */:
-                case 39 /* AsteriskToken */:
-                case 55 /* QuestionToken */:
-                case 51 /* ExclamationToken */:
-                case 24 /* DotDotDotToken */:
-                case 126 /* InferKeyword */:
-                case 91 /* ImportKeyword */:
+                case 119:
+                case 142:
+                case 137:
+                case 134:
+                case 122:
+                case 138:
+                case 141:
+                case 105:
+                case 140:
+                case 95:
+                case 99:
+                case 103:
+                case 131:
+                case 17:
+                case 21:
+                case 27:
+                case 49:
+                case 48:
+                case 94:
+                case 9:
+                case 8:
+                case 101:
+                case 86:
+                case 135:
+                case 39:
+                case 55:
+                case 51:
+                case 24:
+                case 126:
+                case 91:
                     return true;
-                case 38 /* MinusToken */:
+                case 38:
                     return !inStartOfParameter && lookAhead(nextTokenIsNumericLiteral);
-                case 19 /* OpenParenToken */:
-                    // Only consider '(' the start of a type if followed by ')', '...', an identifier, a modifier,
-                    // or something that starts a type. We don't want to consider things like '(1)' a type.
+                case 19:
                     return !inStartOfParameter && lookAhead(isStartOfParenthesizedOrFunctionType);
                 default:
                     return isIdentifier();
@@ -17582,35 +14090,34 @@ var ts;
         }
         function isStartOfParenthesizedOrFunctionType() {
             nextToken();
-            return token() === 20 /* CloseParenToken */ || isStartOfParameter() || isStartOfType();
+            return token() === 20 || isStartOfParameter() || isStartOfType();
         }
         function parsePostfixTypeOrHigher() {
             var type = parseNonArrayType();
             while (!scanner.hasPrecedingLineBreak()) {
                 switch (token()) {
-                    case 51 /* ExclamationToken */:
-                        type = createJSDocPostfixType(282 /* JSDocNonNullableType */, type);
+                    case 51:
+                        type = createJSDocPostfixType(282, type);
                         break;
-                    case 55 /* QuestionToken */:
-                        // If not in JSDoc and next token is start of a type we have a conditional type
-                        if (!(contextFlags & 2097152 /* JSDoc */) && lookAhead(nextTokenIsStartOfType)) {
+                    case 55:
+                        if (!(contextFlags & 2097152) && lookAhead(nextTokenIsStartOfType)) {
                             return type;
                         }
-                        type = createJSDocPostfixType(281 /* JSDocNullableType */, type);
+                        type = createJSDocPostfixType(281, type);
                         break;
-                    case 21 /* OpenBracketToken */:
-                        parseExpected(21 /* OpenBracketToken */);
+                    case 21:
+                        parseExpected(21);
                         if (isStartOfType()) {
-                            var node = createNode(176 /* IndexedAccessType */, type.pos);
+                            var node = createNode(176, type.pos);
                             node.objectType = type;
                             node.indexType = parseType();
-                            parseExpected(22 /* CloseBracketToken */);
+                            parseExpected(22);
                             type = finishNode(node);
                         }
                         else {
-                            var node = createNode(167 /* ArrayType */, type.pos);
+                            var node = createNode(167, type.pos);
                             node.elementType = type;
-                            parseExpected(22 /* CloseBracketToken */);
+                            parseExpected(22);
                             type = finishNode(node);
                         }
                         break;
@@ -17627,16 +14134,16 @@ var ts;
             return finishNode(postfix);
         }
         function parseTypeOperator(operator) {
-            var node = createNode(175 /* TypeOperator */);
+            var node = createNode(175);
             parseExpected(operator);
             node.operator = operator;
             node.type = parseTypeOperatorOrHigher();
             return finishNode(node);
         }
         function parseInferType() {
-            var node = createNode(172 /* InferType */);
-            parseExpected(126 /* InferKeyword */);
-            var typeParameter = createNode(148 /* TypeParameter */);
+            var node = createNode(172);
+            parseExpected(126);
+            var typeParameter = createNode(148);
             typeParameter.name = parseIdentifier();
             node.typeParameter = finishNode(typeParameter);
             return finishNode(node);
@@ -17644,10 +14151,10 @@ var ts;
         function parseTypeOperatorOrHigher() {
             var operator = token();
             switch (operator) {
-                case 128 /* KeyOfKeyword */:
-                case 141 /* UniqueKeyword */:
+                case 128:
+                case 141:
                     return parseTypeOperator(operator);
-                case 126 /* InferKeyword */:
+                case 126:
                     return parseInferType();
             }
             return parsePostfixTypeOrHigher();
@@ -17667,28 +14174,26 @@ var ts;
             return type;
         }
         function parseIntersectionTypeOrHigher() {
-            return parseUnionOrIntersectionType(170 /* IntersectionType */, parseTypeOperatorOrHigher, 48 /* AmpersandToken */);
+            return parseUnionOrIntersectionType(170, parseTypeOperatorOrHigher, 48);
         }
         function parseUnionTypeOrHigher() {
-            return parseUnionOrIntersectionType(169 /* UnionType */, parseIntersectionTypeOrHigher, 49 /* BarToken */);
+            return parseUnionOrIntersectionType(169, parseIntersectionTypeOrHigher, 49);
         }
         function isStartOfFunctionType() {
-            if (token() === 27 /* LessThanToken */) {
+            if (token() === 27) {
                 return true;
             }
-            return token() === 19 /* OpenParenToken */ && lookAhead(isUnambiguouslyStartOfFunctionType);
+            return token() === 19 && lookAhead(isUnambiguouslyStartOfFunctionType);
         }
         function skipParameterStart() {
             if (ts.isModifierKind(token())) {
-                // Skip modifiers
                 parseModifiers();
             }
-            if (isIdentifier() || token() === 99 /* ThisKeyword */) {
+            if (isIdentifier() || token() === 99) {
                 nextToken();
                 return true;
             }
-            if (token() === 21 /* OpenBracketToken */ || token() === 17 /* OpenBraceToken */) {
-                // Return true if we can parse an array or object binding pattern with no errors
+            if (token() === 21 || token() === 17) {
                 var previousErrorCount = parseDiagnostics.length;
                 parseIdentifierOrPattern();
                 return previousErrorCount === parseDiagnostics.length;
@@ -17697,26 +14202,17 @@ var ts;
         }
         function isUnambiguouslyStartOfFunctionType() {
             nextToken();
-            if (token() === 20 /* CloseParenToken */ || token() === 24 /* DotDotDotToken */) {
-                // ( )
-                // ( ...
+            if (token() === 20 || token() === 24) {
                 return true;
             }
             if (skipParameterStart()) {
-                // We successfully skipped modifiers (if any) and an identifier or binding pattern,
-                // now see if we have something that indicates a parameter declaration
-                if (token() === 56 /* ColonToken */ || token() === 26 /* CommaToken */ ||
-                    token() === 55 /* QuestionToken */ || token() === 58 /* EqualsToken */) {
-                    // ( xxx :
-                    // ( xxx ,
-                    // ( xxx ?
-                    // ( xxx =
+                if (token() === 56 || token() === 26 ||
+                    token() === 55 || token() === 58) {
                     return true;
                 }
-                if (token() === 20 /* CloseParenToken */) {
+                if (token() === 20) {
                     nextToken();
-                    if (token() === 36 /* EqualsGreaterThanToken */) {
-                        // ( xxx ) =>
+                    if (token() === 36) {
                         return true;
                     }
                 }
@@ -17727,7 +14223,7 @@ var ts;
             var typePredicateVariable = isIdentifier() && tryParse(parseTypePredicatePrefix);
             var type = parseType();
             if (typePredicateVariable) {
-                var node = createNode(161 /* TypePredicate */, typePredicateVariable.pos);
+                var node = createNode(161, typePredicateVariable.pos);
                 node.parameterName = typePredicateVariable;
                 node.type = type;
                 return finishNode(node);
@@ -17738,60 +14234,56 @@ var ts;
         }
         function parseTypePredicatePrefix() {
             var id = parseIdentifier();
-            if (token() === 127 /* IsKeyword */ && !scanner.hasPrecedingLineBreak()) {
+            if (token() === 127 && !scanner.hasPrecedingLineBreak()) {
                 nextToken();
                 return id;
             }
         }
         function parseType() {
-            // The rules about 'yield' only apply to actual code/expression contexts.  They don't
-            // apply to 'type' contexts.  So we disable these parameters here before moving on.
-            return doOutsideOfContext(20480 /* TypeExcludesFlags */, parseTypeWorker);
+            return doOutsideOfContext(20480, parseTypeWorker);
         }
         function parseTypeWorker(noConditionalTypes) {
-            if (isStartOfFunctionType() || token() === 94 /* NewKeyword */) {
+            if (isStartOfFunctionType() || token() === 94) {
                 return parseFunctionOrConstructorType();
             }
             var type = parseUnionTypeOrHigher();
-            if (!noConditionalTypes && !scanner.hasPrecedingLineBreak() && parseOptional(85 /* ExtendsKeyword */)) {
-                var node = createNode(171 /* ConditionalType */, type.pos);
+            if (!noConditionalTypes && !scanner.hasPrecedingLineBreak() && parseOptional(85)) {
+                var node = createNode(171, type.pos);
                 node.checkType = type;
-                // The type following 'extends' is not permitted to be another conditional type
-                node.extendsType = parseTypeWorker(/*noConditionalTypes*/ true);
-                parseExpected(55 /* QuestionToken */);
+                node.extendsType = parseTypeWorker(true);
+                parseExpected(55);
                 node.trueType = parseTypeWorker();
-                parseExpected(56 /* ColonToken */);
+                parseExpected(56);
                 node.falseType = parseTypeWorker();
                 return finishNode(node);
             }
             return type;
         }
         function parseTypeAnnotation() {
-            return parseOptional(56 /* ColonToken */) ? parseType() : undefined;
+            return parseOptional(56) ? parseType() : undefined;
         }
-        // EXPRESSIONS
         function isStartOfLeftHandSideExpression() {
             switch (token()) {
-                case 99 /* ThisKeyword */:
-                case 97 /* SuperKeyword */:
-                case 95 /* NullKeyword */:
-                case 101 /* TrueKeyword */:
-                case 86 /* FalseKeyword */:
-                case 8 /* NumericLiteral */:
-                case 9 /* StringLiteral */:
-                case 13 /* NoSubstitutionTemplateLiteral */:
-                case 14 /* TemplateHead */:
-                case 19 /* OpenParenToken */:
-                case 21 /* OpenBracketToken */:
-                case 17 /* OpenBraceToken */:
-                case 89 /* FunctionKeyword */:
-                case 75 /* ClassKeyword */:
-                case 94 /* NewKeyword */:
-                case 41 /* SlashToken */:
-                case 63 /* SlashEqualsToken */:
-                case 71 /* Identifier */:
+                case 99:
+                case 97:
+                case 95:
+                case 101:
+                case 86:
+                case 8:
+                case 9:
+                case 13:
+                case 14:
+                case 19:
+                case 21:
+                case 17:
+                case 89:
+                case 75:
+                case 94:
+                case 41:
+                case 63:
+                case 71:
                     return true;
-                case 91 /* ImportKeyword */:
+                case 91:
                     return lookAhead(nextTokenIsOpenParenOrLessThanOrDot);
                 default:
                     return isIdentifier();
@@ -17802,27 +14294,20 @@ var ts;
                 return true;
             }
             switch (token()) {
-                case 37 /* PlusToken */:
-                case 38 /* MinusToken */:
-                case 52 /* TildeToken */:
-                case 51 /* ExclamationToken */:
-                case 80 /* DeleteKeyword */:
-                case 103 /* TypeOfKeyword */:
-                case 105 /* VoidKeyword */:
-                case 43 /* PlusPlusToken */:
-                case 44 /* MinusMinusToken */:
-                case 27 /* LessThanToken */:
-                case 121 /* AwaitKeyword */:
-                case 116 /* YieldKeyword */:
-                    // Yield/await always starts an expression.  Either it is an identifier (in which case
-                    // it is definitely an expression).  Or it's a keyword (either because we're in
-                    // a generator or async function, or in strict mode (or both)) and it started a yield or await expression.
+                case 37:
+                case 38:
+                case 52:
+                case 51:
+                case 80:
+                case 103:
+                case 105:
+                case 43:
+                case 44:
+                case 27:
+                case 121:
+                case 116:
                     return true;
                 default:
-                    // Error tolerance.  If we see the start of some binary operator, we consider
-                    // that the start of an expression.  That way we'll parse out a missing identifier,
-                    // give a good message about an identifier being missing, and then consume the
-                    // rest of the binary expression.
                     if (isBinaryOperator()) {
                         return true;
                     }
@@ -17830,114 +14315,52 @@ var ts;
             }
         }
         function isStartOfExpressionStatement() {
-            // As per the grammar, none of '{' or 'function' or 'class' can start an expression statement.
-            return token() !== 17 /* OpenBraceToken */ &&
-                token() !== 89 /* FunctionKeyword */ &&
-                token() !== 75 /* ClassKeyword */ &&
-                token() !== 57 /* AtToken */ &&
+            return token() !== 17 &&
+                token() !== 89 &&
+                token() !== 75 &&
+                token() !== 57 &&
                 isStartOfExpression();
         }
         function parseExpression() {
-            // Expression[in]:
-            //      AssignmentExpression[in]
-            //      Expression[in] , AssignmentExpression[in]
-            // clear the decorator context when parsing Expression, as it should be unambiguous when parsing a decorator
             var saveDecoratorContext = inDecoratorContext();
             if (saveDecoratorContext) {
-                setDecoratorContext(/*val*/ false);
+                setDecoratorContext(false);
             }
             var expr = parseAssignmentExpressionOrHigher();
             var operatorToken;
-            while ((operatorToken = parseOptionalToken(26 /* CommaToken */))) {
+            while ((operatorToken = parseOptionalToken(26))) {
                 expr = makeBinaryExpression(expr, operatorToken, parseAssignmentExpressionOrHigher());
             }
             if (saveDecoratorContext) {
-                setDecoratorContext(/*val*/ true);
+                setDecoratorContext(true);
             }
             return expr;
         }
         function parseInitializer() {
-            return parseOptional(58 /* EqualsToken */) ? parseAssignmentExpressionOrHigher() : undefined;
+            return parseOptional(58) ? parseAssignmentExpressionOrHigher() : undefined;
         }
         function parseAssignmentExpressionOrHigher() {
-            //  AssignmentExpression[in,yield]:
-            //      1) ConditionalExpression[?in,?yield]
-            //      2) LeftHandSideExpression = AssignmentExpression[?in,?yield]
-            //      3) LeftHandSideExpression AssignmentOperator AssignmentExpression[?in,?yield]
-            //      4) ArrowFunctionExpression[?in,?yield]
-            //      5) AsyncArrowFunctionExpression[in,yield,await]
-            //      6) [+Yield] YieldExpression[?In]
-            //
-            // Note: for ease of implementation we treat productions '2' and '3' as the same thing.
-            // (i.e. they're both BinaryExpressions with an assignment operator in it).
-            // First, do the simple check if we have a YieldExpression (production '6').
             if (isYieldExpression()) {
                 return parseYieldExpression();
             }
-            // Then, check if we have an arrow function (production '4' and '5') that starts with a parenthesized
-            // parameter list or is an async arrow function.
-            // AsyncArrowFunctionExpression:
-            //      1) async[no LineTerminator here]AsyncArrowBindingIdentifier[?Yield][no LineTerminator here]=>AsyncConciseBody[?In]
-            //      2) CoverCallExpressionAndAsyncArrowHead[?Yield, ?Await][no LineTerminator here]=>AsyncConciseBody[?In]
-            // Production (1) of AsyncArrowFunctionExpression is parsed in "tryParseAsyncSimpleArrowFunctionExpression".
-            // And production (2) is parsed in "tryParseParenthesizedArrowFunctionExpression".
-            //
-            // If we do successfully parse arrow-function, we must *not* recurse for productions 1, 2 or 3. An ArrowFunction is
-            // not a LeftHandSideExpression, nor does it start a ConditionalExpression.  So we are done
-            // with AssignmentExpression if we see one.
             var arrowExpression = tryParseParenthesizedArrowFunctionExpression() || tryParseAsyncSimpleArrowFunctionExpression();
             if (arrowExpression) {
                 return arrowExpression;
             }
-            // Now try to see if we're in production '1', '2' or '3'.  A conditional expression can
-            // start with a LogicalOrExpression, while the assignment productions can only start with
-            // LeftHandSideExpressions.
-            //
-            // So, first, we try to just parse out a BinaryExpression.  If we get something that is a
-            // LeftHandSide or higher, then we can try to parse out the assignment expression part.
-            // Otherwise, we try to parse out the conditional expression bit.  We want to allow any
-            // binary expression here, so we pass in the 'lowest' precedence here so that it matches
-            // and consumes anything.
-            var expr = parseBinaryExpressionOrHigher(/*precedence*/ 0);
-            // To avoid a look-ahead, we did not handle the case of an arrow function with a single un-parenthesized
-            // parameter ('x => ...') above. We handle it here by checking if the parsed expression was a single
-            // identifier and the current token is an arrow.
-            if (expr.kind === 71 /* Identifier */ && token() === 36 /* EqualsGreaterThanToken */) {
+            var expr = parseBinaryExpressionOrHigher(0);
+            if (expr.kind === 71 && token() === 36) {
                 return parseSimpleArrowFunctionExpression(expr);
             }
-            // Now see if we might be in cases '2' or '3'.
-            // If the expression was a LHS expression, and we have an assignment operator, then
-            // we're in '2' or '3'. Consume the assignment and return.
-            //
-            // Note: we call reScanGreaterToken so that we get an appropriately merged token
-            // for cases like `> > =` becoming `>>=`
             if (ts.isLeftHandSideExpression(expr) && ts.isAssignmentOperator(reScanGreaterToken())) {
                 return makeBinaryExpression(expr, parseTokenNode(), parseAssignmentExpressionOrHigher());
             }
-            // It wasn't an assignment or a lambda.  This is a conditional expression:
             return parseConditionalExpressionRest(expr);
         }
         function isYieldExpression() {
-            if (token() === 116 /* YieldKeyword */) {
-                // If we have a 'yield' keyword, and this is a context where yield expressions are
-                // allowed, then definitely parse out a yield expression.
+            if (token() === 116) {
                 if (inYieldContext()) {
                     return true;
                 }
-                // We're in a context where 'yield expr' is not allowed.  However, if we can
-                // definitely tell that the user was trying to parse a 'yield expr' and not
-                // just a normal expr that start with a 'yield' identifier, then parse out
-                // a 'yield expr'.  We can then report an error later that they are only
-                // allowed in generator expressions.
-                //
-                // for example, if we see 'yield(foo)', then we'll have to treat that as an
-                // invocation expression of something called 'yield'.  However, if we have
-                // 'yield foo' then that is not legal as a normal expression, so we can
-                // definitely recognize this as a yield expression.
-                //
-                // for now we just check if the next token is an identifier.  More heuristics
-                // can be added here later as necessary.  We just need to make sure that we
-                // don't accidentally consume something legal.
                 return lookAhead(nextTokenIsIdentifierOrKeywordOrLiteralOnSameLine);
             }
             return false;
@@ -17947,302 +14370,213 @@ var ts;
             return !scanner.hasPrecedingLineBreak() && isIdentifier();
         }
         function parseYieldExpression() {
-            var node = createNode(203 /* YieldExpression */);
-            // YieldExpression[In] :
-            //      yield
-            //      yield [no LineTerminator here] [Lexical goal InputElementRegExp]AssignmentExpression[?In, Yield]
-            //      yield [no LineTerminator here] * [Lexical goal InputElementRegExp]AssignmentExpression[?In, Yield]
+            var node = createNode(203);
             nextToken();
             if (!scanner.hasPrecedingLineBreak() &&
-                (token() === 39 /* AsteriskToken */ || isStartOfExpression())) {
-                node.asteriskToken = parseOptionalToken(39 /* AsteriskToken */);
+                (token() === 39 || isStartOfExpression())) {
+                node.asteriskToken = parseOptionalToken(39);
                 node.expression = parseAssignmentExpressionOrHigher();
                 return finishNode(node);
             }
             else {
-                // if the next token is not on the same line as yield.  or we don't have an '*' or
-                // the start of an expression, then this is just a simple "yield" expression.
                 return finishNode(node);
             }
         }
         function parseSimpleArrowFunctionExpression(identifier, asyncModifier) {
-            ts.Debug.assert(token() === 36 /* EqualsGreaterThanToken */, "parseSimpleArrowFunctionExpression should only have been called if we had a =>");
+            ts.Debug.assert(token() === 36, "parseSimpleArrowFunctionExpression should only have been called if we had a =>");
             var node;
             if (asyncModifier) {
-                node = createNode(193 /* ArrowFunction */, asyncModifier.pos);
+                node = createNode(193, asyncModifier.pos);
                 node.modifiers = asyncModifier;
             }
             else {
-                node = createNode(193 /* ArrowFunction */, identifier.pos);
+                node = createNode(193, identifier.pos);
             }
-            var parameter = createNode(149 /* Parameter */, identifier.pos);
+            var parameter = createNode(149, identifier.pos);
             parameter.name = identifier;
             finishNode(parameter);
             node.parameters = createNodeArray([parameter], parameter.pos, parameter.end);
-            node.equalsGreaterThanToken = parseExpectedToken(36 /* EqualsGreaterThanToken */);
-            node.body = parseArrowFunctionExpressionBody(/*isAsync*/ !!asyncModifier);
+            node.equalsGreaterThanToken = parseExpectedToken(36);
+            node.body = parseArrowFunctionExpressionBody(!!asyncModifier);
             return addJSDocComment(finishNode(node));
         }
         function tryParseParenthesizedArrowFunctionExpression() {
             var triState = isParenthesizedArrowFunctionExpression();
-            if (triState === 0 /* False */) {
-                // It's definitely not a parenthesized arrow function expression.
+            if (triState === 0) {
                 return undefined;
             }
-            // If we definitely have an arrow function, then we can just parse one, not requiring a
-            // following => or { token. Otherwise, we *might* have an arrow function.  Try to parse
-            // it out, but don't allow any ambiguity, and return 'undefined' if this could be an
-            // expression instead.
-            var arrowFunction = triState === 1 /* True */
-                ? parseParenthesizedArrowFunctionExpressionHead(/*allowAmbiguity*/ true)
+            var arrowFunction = triState === 1
+                ? parseParenthesizedArrowFunctionExpressionHead(true)
                 : tryParse(parsePossibleParenthesizedArrowFunctionExpressionHead);
             if (!arrowFunction) {
-                // Didn't appear to actually be a parenthesized arrow function.  Just bail out.
                 return undefined;
             }
-            var isAsync = ts.hasModifier(arrowFunction, 256 /* Async */);
-            // If we have an arrow, then try to parse the body. Even if not, try to parse if we
-            // have an opening brace, just in case we're in an error state.
+            var isAsync = ts.hasModifier(arrowFunction, 256);
             var lastToken = token();
-            arrowFunction.equalsGreaterThanToken = parseExpectedToken(36 /* EqualsGreaterThanToken */);
-            arrowFunction.body = (lastToken === 36 /* EqualsGreaterThanToken */ || lastToken === 17 /* OpenBraceToken */)
+            arrowFunction.equalsGreaterThanToken = parseExpectedToken(36);
+            arrowFunction.body = (lastToken === 36 || lastToken === 17)
                 ? parseArrowFunctionExpressionBody(isAsync)
                 : parseIdentifier();
             return finishNode(arrowFunction);
         }
-        //  True        -> We definitely expect a parenthesized arrow function here.
-        //  False       -> There *cannot* be a parenthesized arrow function here.
-        //  Unknown     -> There *might* be a parenthesized arrow function here.
-        //                 Speculatively look ahead to be sure, and rollback if not.
         function isParenthesizedArrowFunctionExpression() {
-            if (token() === 19 /* OpenParenToken */ || token() === 27 /* LessThanToken */ || token() === 120 /* AsyncKeyword */) {
+            if (token() === 19 || token() === 27 || token() === 120) {
                 return lookAhead(isParenthesizedArrowFunctionExpressionWorker);
             }
-            if (token() === 36 /* EqualsGreaterThanToken */) {
-                // ERROR RECOVERY TWEAK:
-                // If we see a standalone => try to parse it as an arrow function expression as that's
-                // likely what the user intended to write.
-                return 1 /* True */;
+            if (token() === 36) {
+                return 1;
             }
-            // Definitely not a parenthesized arrow function.
-            return 0 /* False */;
+            return 0;
         }
         function isParenthesizedArrowFunctionExpressionWorker() {
-            if (token() === 120 /* AsyncKeyword */) {
+            if (token() === 120) {
                 nextToken();
                 if (scanner.hasPrecedingLineBreak()) {
-                    return 0 /* False */;
+                    return 0;
                 }
-                if (token() !== 19 /* OpenParenToken */ && token() !== 27 /* LessThanToken */) {
-                    return 0 /* False */;
+                if (token() !== 19 && token() !== 27) {
+                    return 0;
                 }
             }
             var first = token();
             var second = nextToken();
-            if (first === 19 /* OpenParenToken */) {
-                if (second === 20 /* CloseParenToken */) {
-                    // Simple cases: "() =>", "(): ", and "() {".
-                    // This is an arrow function with no parameters.
-                    // The last one is not actually an arrow function,
-                    // but this is probably what the user intended.
+            if (first === 19) {
+                if (second === 20) {
                     var third = nextToken();
                     switch (third) {
-                        case 36 /* EqualsGreaterThanToken */:
-                        case 56 /* ColonToken */:
-                        case 17 /* OpenBraceToken */:
-                            return 1 /* True */;
+                        case 36:
+                        case 56:
+                        case 17:
+                            return 1;
                         default:
-                            return 0 /* False */;
-                    }
-                }
-                // If encounter "([" or "({", this could be the start of a binding pattern.
-                // Examples:
-                //      ([ x ]) => { }
-                //      ({ x }) => { }
-                //      ([ x ])
-                //      ({ x })
-                if (second === 21 /* OpenBracketToken */ || second === 17 /* OpenBraceToken */) {
-                    return 2 /* Unknown */;
-                }
-                // Simple case: "(..."
-                // This is an arrow function with a rest parameter.
-                if (second === 24 /* DotDotDotToken */) {
-                    return 1 /* True */;
-                }
-                // Check for "(xxx yyy", where xxx is a modifier and yyy is an identifier. This
-                // isn't actually allowed, but we want to treat it as a lambda so we can provide
-                // a good error message.
-                if (ts.isModifierKind(second) && second !== 120 /* AsyncKeyword */ && lookAhead(nextTokenIsIdentifier)) {
-                    return 1 /* True */;
-                }
-                // If we had "(" followed by something that's not an identifier,
-                // then this definitely doesn't look like a lambda.
+                            return 0;
+                    }
+                }
+                if (second === 21 || second === 17) {
+                    return 2;
+                }
+                if (second === 24) {
+                    return 1;
+                }
+                if (ts.isModifierKind(second) && second !== 120 && lookAhead(nextTokenIsIdentifier)) {
+                    return 1;
+                }
                 if (!isIdentifier()) {
-                    return 0 /* False */;
+                    return 0;
                 }
                 switch (nextToken()) {
-                    case 56 /* ColonToken */:
-                        // If we have something like "(a:", then we must have a
-                        // type-annotated parameter in an arrow function expression.
-                        return 1 /* True */;
-                    case 55 /* QuestionToken */:
+                    case 56:
+                        return 1;
+                    case 55:
                         nextToken();
-                        // If we have "(a?:" or "(a?," or "(a?=" or "(a?)" then it is definitely a lambda.
-                        if (token() === 56 /* ColonToken */ || token() === 26 /* CommaToken */ || token() === 58 /* EqualsToken */ || token() === 20 /* CloseParenToken */) {
-                            return 1 /* True */;
+                        if (token() === 56 || token() === 26 || token() === 58 || token() === 20) {
+                            return 1;
                         }
-                        // Otherwise it is definitely not a lambda.
-                        return 0 /* False */;
-                    case 26 /* CommaToken */:
-                    case 58 /* EqualsToken */:
-                    case 20 /* CloseParenToken */:
-                        // If we have "(a," or "(a=" or "(a)" this *could* be an arrow function
-                        return 2 /* Unknown */;
+                        return 0;
+                    case 26:
+                    case 58:
+                    case 20:
+                        return 2;
                 }
-                // It is definitely not an arrow function
-                return 0 /* False */;
+                return 0;
             }
             else {
-                ts.Debug.assert(first === 27 /* LessThanToken */);
-                // If we have "<" not followed by an identifier,
-                // then this definitely is not an arrow function.
+                ts.Debug.assert(first === 27);
                 if (!isIdentifier()) {
-                    return 0 /* False */;
+                    return 0;
                 }
-                // JSX overrides
-                if (sourceFile.languageVariant === 1 /* JSX */) {
+                if (sourceFile.languageVariant === 1) {
                     var isArrowFunctionInJsx = lookAhead(function () {
                         var third = nextToken();
-                        if (third === 85 /* ExtendsKeyword */) {
+                        if (third === 85) {
                             var fourth = nextToken();
                             switch (fourth) {
-                                case 58 /* EqualsToken */:
-                                case 29 /* GreaterThanToken */:
+                                case 58:
+                                case 29:
                                     return false;
                                 default:
                                     return true;
                             }
                         }
-                        else if (third === 26 /* CommaToken */) {
+                        else if (third === 26) {
                             return true;
                         }
                         return false;
                     });
                     if (isArrowFunctionInJsx) {
-                        return 1 /* True */;
+                        return 1;
                     }
-                    return 0 /* False */;
+                    return 0;
                 }
-                // This *could* be a parenthesized arrow function.
-                return 2 /* Unknown */;
+                return 2;
             }
         }
         function parsePossibleParenthesizedArrowFunctionExpressionHead() {
-            return parseParenthesizedArrowFunctionExpressionHead(/*allowAmbiguity*/ false);
+            return parseParenthesizedArrowFunctionExpressionHead(false);
         }
         function tryParseAsyncSimpleArrowFunctionExpression() {
-            // We do a check here so that we won't be doing unnecessarily call to "lookAhead"
-            if (token() === 120 /* AsyncKeyword */) {
-                if (lookAhead(isUnParenthesizedAsyncArrowFunctionWorker) === 1 /* True */) {
+            if (token() === 120) {
+                if (lookAhead(isUnParenthesizedAsyncArrowFunctionWorker) === 1) {
                     var asyncModifier = parseModifiersForArrowFunction();
-                    var expr = parseBinaryExpressionOrHigher(/*precedence*/ 0);
+                    var expr = parseBinaryExpressionOrHigher(0);
                     return parseSimpleArrowFunctionExpression(expr, asyncModifier);
                 }
             }
             return undefined;
         }
         function isUnParenthesizedAsyncArrowFunctionWorker() {
-            // AsyncArrowFunctionExpression:
-            //      1) async[no LineTerminator here]AsyncArrowBindingIdentifier[?Yield][no LineTerminator here]=>AsyncConciseBody[?In]
-            //      2) CoverCallExpressionAndAsyncArrowHead[?Yield, ?Await][no LineTerminator here]=>AsyncConciseBody[?In]
-            if (token() === 120 /* AsyncKeyword */) {
+            if (token() === 120) {
                 nextToken();
-                // If the "async" is followed by "=>" token then it is not a beginning of an async arrow-function
-                // but instead a simple arrow-function which will be parsed inside "parseAssignmentExpressionOrHigher"
-                if (scanner.hasPrecedingLineBreak() || token() === 36 /* EqualsGreaterThanToken */) {
-                    return 0 /* False */;
+                if (scanner.hasPrecedingLineBreak() || token() === 36) {
+                    return 0;
                 }
-                // Check for un-parenthesized AsyncArrowFunction
-                var expr = parseBinaryExpressionOrHigher(/*precedence*/ 0);
-                if (!scanner.hasPrecedingLineBreak() && expr.kind === 71 /* Identifier */ && token() === 36 /* EqualsGreaterThanToken */) {
-                    return 1 /* True */;
+                var expr = parseBinaryExpressionOrHigher(0);
+                if (!scanner.hasPrecedingLineBreak() && expr.kind === 71 && token() === 36) {
+                    return 1;
                 }
             }
-            return 0 /* False */;
+            return 0;
         }
         function parseParenthesizedArrowFunctionExpressionHead(allowAmbiguity) {
-            var node = createNodeWithJSDoc(193 /* ArrowFunction */);
+            var node = createNodeWithJSDoc(193);
             node.modifiers = parseModifiersForArrowFunction();
-            var isAsync = ts.hasModifier(node, 256 /* Async */) ? 2 /* Await */ : 0 /* None */;
-            // Arrow functions are never generators.
-            //
-            // If we're speculatively parsing a signature for a parenthesized arrow function, then
-            // we have to have a complete parameter list.  Otherwise we might see something like
-            // a => (b => c)
-            // And think that "(b =>" was actually a parenthesized arrow function with a missing
-            // close paren.
-            if (!fillSignature(56 /* ColonToken */, isAsync, node) && !allowAmbiguity) {
+            var isAsync = ts.hasModifier(node, 256) ? 2 : 0;
+            if (!fillSignature(56, isAsync, node) && !allowAmbiguity) {
                 return undefined;
             }
-            // Parsing a signature isn't enough.
-            // Parenthesized arrow signatures often look like other valid expressions.
-            // For instance:
-            //  - "(x = 10)" is an assignment expression parsed as a signature with a default parameter value.
-            //  - "(x,y)" is a comma expression parsed as a signature with two parameters.
-            //  - "a ? (b): c" will have "(b):" parsed as a signature with a return type annotation.
-            //
-            // So we need just a bit of lookahead to ensure that it can only be a signature.
-            if (!allowAmbiguity && token() !== 36 /* EqualsGreaterThanToken */ && token() !== 17 /* OpenBraceToken */) {
-                // Returning undefined here will cause our caller to rewind to where we started from.
+            if (!allowAmbiguity && token() !== 36 && token() !== 17) {
                 return undefined;
             }
             return node;
         }
         function parseArrowFunctionExpressionBody(isAsync) {
-            if (token() === 17 /* OpenBraceToken */) {
-                return parseFunctionBlock(isAsync ? 2 /* Await */ : 0 /* None */);
+            if (token() === 17) {
+                return parseFunctionBlock(isAsync ? 2 : 0);
             }
-            if (token() !== 25 /* SemicolonToken */ &&
-                token() !== 89 /* FunctionKeyword */ &&
-                token() !== 75 /* ClassKeyword */ &&
+            if (token() !== 25 &&
+                token() !== 89 &&
+                token() !== 75 &&
                 isStartOfStatement() &&
                 !isStartOfExpressionStatement()) {
-                // Check if we got a plain statement (i.e. no expression-statements, no function/class expressions/declarations)
-                //
-                // Here we try to recover from a potential error situation in the case where the
-                // user meant to supply a block. For example, if the user wrote:
-                //
-                //  a =>
-                //      let v = 0;
-                //  }
-                //
-                // they may be missing an open brace.  Check to see if that's the case so we can
-                // try to recover better.  If we don't do this, then the next close curly we see may end
-                // up preemptively closing the containing construct.
-                //
-                // Note: even when 'IgnoreMissingOpenBrace' is passed, parseBody will still error.
-                return parseFunctionBlock(16 /* IgnoreMissingOpenBrace */ | (isAsync ? 2 /* Await */ : 0 /* None */));
+                return parseFunctionBlock(16 | (isAsync ? 2 : 0));
             }
             return isAsync
                 ? doInAwaitContext(parseAssignmentExpressionOrHigher)
                 : doOutsideOfAwaitContext(parseAssignmentExpressionOrHigher);
         }
         function parseConditionalExpressionRest(leftOperand) {
-            // Note: we are passed in an expression which was produced from parseBinaryExpressionOrHigher.
-            var questionToken = parseOptionalToken(55 /* QuestionToken */);
+            var questionToken = parseOptionalToken(55);
             if (!questionToken) {
                 return leftOperand;
             }
-            // Note: we explicitly 'allowIn' in the whenTrue part of the condition expression, and
-            // we do not that for the 'whenFalse' part.
-            var node = createNode(201 /* ConditionalExpression */, leftOperand.pos);
+            var node = createNode(201, leftOperand.pos);
             node.condition = leftOperand;
             node.questionToken = questionToken;
             node.whenTrue = doOutsideOfContext(disallowInAndDecoratorContext, parseAssignmentExpressionOrHigher);
-            node.colonToken = parseExpectedToken(56 /* ColonToken */);
+            node.colonToken = parseExpectedToken(56);
             node.whenFalse = ts.nodeIsPresent(node.colonToken)
                 ? parseAssignmentExpressionOrHigher()
-                : createMissingNode(71 /* Identifier */, /*reportAtCurrentPosition*/ false, ts.Diagnostics._0_expected, ts.tokenToString(56 /* ColonToken */));
+                : createMissingNode(71, false, ts.Diagnostics._0_expected, ts.tokenToString(56));
             return finishNode(node);
         }
         function parseBinaryExpressionOrHigher(precedence) {
@@ -18250,50 +14584,22 @@ var ts;
             return parseBinaryExpressionRest(precedence, leftOperand);
         }
         function isInOrOfKeyword(t) {
-            return t === 92 /* InKeyword */ || t === 145 /* OfKeyword */;
+            return t === 92 || t === 145;
         }
         function parseBinaryExpressionRest(precedence, leftOperand) {
             while (true) {
-                // We either have a binary operator here, or we're finished.  We call
-                // reScanGreaterToken so that we merge token sequences like > and = into >=
                 reScanGreaterToken();
                 var newPrecedence = ts.getBinaryOperatorPrecedence(token());
-                // Check the precedence to see if we should "take" this operator
-                // - For left associative operator (all operator but **), consume the operator,
-                //   recursively call the function below, and parse binaryExpression as a rightOperand
-                //   of the caller if the new precedence of the operator is greater then or equal to the current precedence.
-                //   For example:
-                //      a - b - c;
-                //            ^token; leftOperand = b. Return b to the caller as a rightOperand
-                //      a * b - c
-                //            ^token; leftOperand = b. Return b to the caller as a rightOperand
-                //      a - b * c;
-                //            ^token; leftOperand = b. Return b * c to the caller as a rightOperand
-                // - For right associative operator (**), consume the operator, recursively call the function
-                //   and parse binaryExpression as a rightOperand of the caller if the new precedence of
-                //   the operator is strictly grater than the current precedence
-                //   For example:
-                //      a ** b ** c;
-                //             ^^token; leftOperand = b. Return b ** c to the caller as a rightOperand
-                //      a - b ** c;
-                //            ^^token; leftOperand = b. Return b ** c to the caller as a rightOperand
-                //      a ** b - c
-                //             ^token; leftOperand = b. Return b to the caller as a rightOperand
-                var consumeCurrentOperator = token() === 40 /* AsteriskAsteriskToken */ ?
+                var consumeCurrentOperator = token() === 40 ?
                     newPrecedence >= precedence :
                     newPrecedence > precedence;
                 if (!consumeCurrentOperator) {
                     break;
                 }
-                if (token() === 92 /* InKeyword */ && inDisallowInContext()) {
+                if (token() === 92 && inDisallowInContext()) {
                     break;
                 }
-                if (token() === 118 /* AsKeyword */) {
-                    // Make sure we *do* perform ASI for constructs like this:
-                    //    var x = foo
-                    //    as (Bar)
-                    // This should be parsed as an initialized variable, followed
-                    // by a function call to 'as' with the argument 'Bar'
+                if (token() === 118) {
                     if (scanner.hasPrecedingLineBreak()) {
                         break;
                     }
@@ -18309,105 +14615,77 @@ var ts;
             return leftOperand;
         }
         function isBinaryOperator() {
-            if (inDisallowInContext() && token() === 92 /* InKeyword */) {
+            if (inDisallowInContext() && token() === 92) {
                 return false;
             }
             return ts.getBinaryOperatorPrecedence(token()) > 0;
         }
         function makeBinaryExpression(left, operatorToken, right) {
-            var node = createNode(200 /* BinaryExpression */, left.pos);
+            var node = createNode(200, left.pos);
             node.left = left;
             node.operatorToken = operatorToken;
             node.right = right;
             return finishNode(node);
         }
         function makeAsExpression(left, right) {
-            var node = createNode(208 /* AsExpression */, left.pos);
+            var node = createNode(208, left.pos);
             node.expression = left;
             node.type = right;
             return finishNode(node);
         }
         function parsePrefixUnaryExpression() {
-            var node = createNode(198 /* PrefixUnaryExpression */);
+            var node = createNode(198);
             node.operator = token();
             nextToken();
             node.operand = parseSimpleUnaryExpression();
             return finishNode(node);
         }
         function parseDeleteExpression() {
-            var node = createNode(194 /* DeleteExpression */);
+            var node = createNode(194);
             nextToken();
             node.expression = parseSimpleUnaryExpression();
             return finishNode(node);
         }
         function parseTypeOfExpression() {
-            var node = createNode(195 /* TypeOfExpression */);
+            var node = createNode(195);
             nextToken();
             node.expression = parseSimpleUnaryExpression();
             return finishNode(node);
         }
         function parseVoidExpression() {
-            var node = createNode(196 /* VoidExpression */);
+            var node = createNode(196);
             nextToken();
             node.expression = parseSimpleUnaryExpression();
             return finishNode(node);
         }
         function isAwaitExpression() {
-            if (token() === 121 /* AwaitKeyword */) {
+            if (token() === 121) {
                 if (inAwaitContext()) {
                     return true;
                 }
-                // here we are using similar heuristics as 'isYieldExpression'
                 return lookAhead(nextTokenIsIdentifierOrKeywordOrLiteralOnSameLine);
             }
             return false;
         }
         function parseAwaitExpression() {
-            var node = createNode(197 /* AwaitExpression */);
+            var node = createNode(197);
             nextToken();
             node.expression = parseSimpleUnaryExpression();
             return finishNode(node);
         }
-        /**
-         * Parse ES7 exponential expression and await expression
-         *
-         * ES7 ExponentiationExpression:
-         *      1) UnaryExpression[?Yield]
-         *      2) UpdateExpression[?Yield] ** ExponentiationExpression[?Yield]
-         *
-         */
         function parseUnaryExpressionOrHigher() {
-            /**
-             * ES7 UpdateExpression:
-             *      1) LeftHandSideExpression[?Yield]
-             *      2) LeftHandSideExpression[?Yield][no LineTerminator here]++
-             *      3) LeftHandSideExpression[?Yield][no LineTerminator here]--
-             *      4) ++UnaryExpression[?Yield]
-             *      5) --UnaryExpression[?Yield]
-             */
             if (isUpdateExpression()) {
                 var updateExpression = parseUpdateExpression();
-                return token() === 40 /* AsteriskAsteriskToken */ ?
+                return token() === 40 ?
                     parseBinaryExpressionRest(ts.getBinaryOperatorPrecedence(token()), updateExpression) :
                     updateExpression;
             }
-            /**
-             * ES7 UnaryExpression:
-             *      1) UpdateExpression[?yield]
-             *      2) delete UpdateExpression[?yield]
-             *      3) void UpdateExpression[?yield]
-             *      4) typeof UpdateExpression[?yield]
-             *      5) + UpdateExpression[?yield]
-             *      6) - UpdateExpression[?yield]
-             *      7) ~ UpdateExpression[?yield]
-             *      8) ! UpdateExpression[?yield]
-             */
             var unaryOperator = token();
             var simpleUnaryExpression = parseSimpleUnaryExpression();
-            if (token() === 40 /* AsteriskAsteriskToken */) {
+            if (token() === 40) {
                 var pos = ts.skipTrivia(sourceText, simpleUnaryExpression.pos);
                 var end = simpleUnaryExpression.end;
-                if (simpleUnaryExpression.kind === 190 /* TypeAssertionExpression */) {
+                if (simpleUnaryExpression.kind === 190) {
                     parseErrorAt(pos, end, ts.Diagnostics.A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses);
                 }
                 else {
@@ -18416,108 +14694,63 @@ var ts;
             }
             return simpleUnaryExpression;
         }
-        /**
-         * Parse ES7 simple-unary expression or higher:
-         *
-         * ES7 UnaryExpression:
-         *      1) UpdateExpression[?yield]
-         *      2) delete UnaryExpression[?yield]
-         *      3) void UnaryExpression[?yield]
-         *      4) typeof UnaryExpression[?yield]
-         *      5) + UnaryExpression[?yield]
-         *      6) - UnaryExpression[?yield]
-         *      7) ~ UnaryExpression[?yield]
-         *      8) ! UnaryExpression[?yield]
-         *      9) [+Await] await UnaryExpression[?yield]
-         */
         function parseSimpleUnaryExpression() {
             switch (token()) {
-                case 37 /* PlusToken */:
-                case 38 /* MinusToken */:
-                case 52 /* TildeToken */:
-                case 51 /* ExclamationToken */:
+                case 37:
+                case 38:
+                case 52:
+                case 51:
                     return parsePrefixUnaryExpression();
-                case 80 /* DeleteKeyword */:
+                case 80:
                     return parseDeleteExpression();
-                case 103 /* TypeOfKeyword */:
+                case 103:
                     return parseTypeOfExpression();
-                case 105 /* VoidKeyword */:
+                case 105:
                     return parseVoidExpression();
-                case 27 /* LessThanToken */:
-                    // This is modified UnaryExpression grammar in TypeScript
-                    //  UnaryExpression (modified):
-                    //      < type > UnaryExpression
+                case 27:
                     return parseTypeAssertion();
-                case 121 /* AwaitKeyword */:
+                case 121:
                     if (isAwaitExpression()) {
                         return parseAwaitExpression();
                     }
-                // falls through
                 default:
                     return parseUpdateExpression();
             }
         }
-        /**
-         * Check if the current token can possibly be an ES7 increment expression.
-         *
-         * ES7 UpdateExpression:
-         *      LeftHandSideExpression[?Yield]
-         *      LeftHandSideExpression[?Yield][no LineTerminator here]++
-         *      LeftHandSideExpression[?Yield][no LineTerminator here]--
-         *      ++LeftHandSideExpression[?Yield]
-         *      --LeftHandSideExpression[?Yield]
-         */
         function isUpdateExpression() {
-            // This function is called inside parseUnaryExpression to decide
-            // whether to call parseSimpleUnaryExpression or call parseUpdateExpression directly
             switch (token()) {
-                case 37 /* PlusToken */:
-                case 38 /* MinusToken */:
-                case 52 /* TildeToken */:
-                case 51 /* ExclamationToken */:
-                case 80 /* DeleteKeyword */:
-                case 103 /* TypeOfKeyword */:
-                case 105 /* VoidKeyword */:
-                case 121 /* AwaitKeyword */:
+                case 37:
+                case 38:
+                case 52:
+                case 51:
+                case 80:
+                case 103:
+                case 105:
+                case 121:
                     return false;
-                case 27 /* LessThanToken */:
-                    // If we are not in JSX context, we are parsing TypeAssertion which is an UnaryExpression
-                    if (sourceFile.languageVariant !== 1 /* JSX */) {
+                case 27:
+                    if (sourceFile.languageVariant !== 1) {
                         return false;
                     }
-                // We are in JSX context and the token is part of JSXElement.
-                // falls through
                 default:
                     return true;
             }
         }
-        /**
-         * Parse ES7 UpdateExpression. UpdateExpression is used instead of ES6's PostFixExpression.
-         *
-         * ES7 UpdateExpression[yield]:
-         *      1) LeftHandSideExpression[?yield]
-         *      2) LeftHandSideExpression[?yield] [[no LineTerminator here]]++
-         *      3) LeftHandSideExpression[?yield] [[no LineTerminator here]]--
-         *      4) ++LeftHandSideExpression[?yield]
-         *      5) --LeftHandSideExpression[?yield]
-         * In TypeScript (2), (3) are parsed as PostfixUnaryExpression. (4), (5) are parsed as PrefixUnaryExpression
-         */
         function parseUpdateExpression() {
-            if (token() === 43 /* PlusPlusToken */ || token() === 44 /* MinusMinusToken */) {
-                var node = createNode(198 /* PrefixUnaryExpression */);
+            if (token() === 43 || token() === 44) {
+                var node = createNode(198);
                 node.operator = token();
                 nextToken();
                 node.operand = parseLeftHandSideExpressionOrHigher();
                 return finishNode(node);
             }
-            else if (sourceFile.languageVariant === 1 /* JSX */ && token() === 27 /* LessThanToken */ && lookAhead(nextTokenIsIdentifierOrKeywordOrGreaterThan)) {
-                // JSXElement is part of primaryExpression
-                return parseJsxElementOrSelfClosingElementOrFragment(/*inExpressionContext*/ true);
+            else if (sourceFile.languageVariant === 1 && token() === 27 && lookAhead(nextTokenIsIdentifierOrKeywordOrGreaterThan)) {
+                return parseJsxElementOrSelfClosingElementOrFragment(true);
             }
             var expression = parseLeftHandSideExpressionOrHigher();
             ts.Debug.assert(ts.isLeftHandSideExpression(expression));
-            if ((token() === 43 /* PlusPlusToken */ || token() === 44 /* MinusMinusToken */) && !scanner.hasPrecedingLineBreak()) {
-                var node = createNode(199 /* PostfixUnaryExpression */, expression.pos);
+            if ((token() === 43 || token() === 44) && !scanner.hasPrecedingLineBreak()) {
+                var node = createNode(199, expression.pos);
                 node.operand = expression;
                 node.operator = token();
                 nextToken();
@@ -18526,139 +14759,51 @@ var ts;
             return expression;
         }
         function parseLeftHandSideExpressionOrHigher() {
-            // Original Ecma:
-            // LeftHandSideExpression: See 11.2
-            //      NewExpression
-            //      CallExpression
-            //
-            // Our simplification:
-            //
-            // LeftHandSideExpression: See 11.2
-            //      MemberExpression
-            //      CallExpression
-            //
-            // See comment in parseMemberExpressionOrHigher on how we replaced NewExpression with
-            // MemberExpression to make our lives easier.
-            //
-            // to best understand the below code, it's important to see how CallExpression expands
-            // out into its own productions:
-            //
-            // CallExpression:
-            //      MemberExpression Arguments
-            //      CallExpression Arguments
-            //      CallExpression[Expression]
-            //      CallExpression.IdentifierName
-            //      import (AssignmentExpression)
-            //      super Arguments
-            //      super.IdentifierName
-            //
-            // Because of the recursion in these calls, we need to bottom out first. There are three
-            // bottom out states we can run into: 1) We see 'super' which must start either of
-            // the last two CallExpression productions. 2) We see 'import' which must start import call.
-            // 3)we have a MemberExpression which either completes the LeftHandSideExpression,
-            // or starts the beginning of the first four CallExpression productions.
             var expression;
-            if (token() === 91 /* ImportKeyword */) {
+            if (token() === 91) {
                 if (lookAhead(nextTokenIsOpenParenOrLessThan)) {
-                    // We don't want to eagerly consume all import keyword as import call expression so we look ahead to find "("
-                    // For example:
-                    //      var foo3 = require("subfolder
-                    //      import * as foo1 from "module-from-node
-                    // We want this import to be a statement rather than import call expression
-                    sourceFile.flags |= 524288 /* PossiblyContainsDynamicImport */;
+                    sourceFile.flags |= 524288;
                     expression = parseTokenNode();
                 }
                 else if (lookAhead(nextTokenIsDot)) {
-                    // This is an 'import.*' metaproperty (i.e. 'import.meta')
                     var fullStart = scanner.getStartPos();
-                    nextToken(); // advance past the 'import'
-                    nextToken(); // advance past the dot
-                    var node = createNode(210 /* MetaProperty */, fullStart);
-                    node.keywordToken = 91 /* ImportKeyword */;
+                    nextToken();
+                    nextToken();
+                    var node = createNode(210, fullStart);
+                    node.keywordToken = 91;
                     node.name = parseIdentifierName();
                     expression = finishNode(node);
-                    sourceFile.flags |= 1048576 /* PossiblyContainsImportMeta */;
+                    sourceFile.flags |= 1048576;
                 }
                 else {
                     expression = parseMemberExpressionOrHigher();
                 }
             }
             else {
-                expression = token() === 97 /* SuperKeyword */ ? parseSuperExpression() : parseMemberExpressionOrHigher();
+                expression = token() === 97 ? parseSuperExpression() : parseMemberExpressionOrHigher();
             }
-            // Now, we *may* be complete.  However, we might have consumed the start of a
-            // CallExpression.  As such, we need to consume the rest of it here to be complete.
             return parseCallExpressionRest(expression);
         }
         function parseMemberExpressionOrHigher() {
-            // Note: to make our lives simpler, we decompose the NewExpression productions and
-            // place ObjectCreationExpression and FunctionExpression into PrimaryExpression.
-            // like so:
-            //
-            //   PrimaryExpression : See 11.1
-            //      this
-            //      Identifier
-            //      Literal
-            //      ArrayLiteral
-            //      ObjectLiteral
-            //      (Expression)
-            //      FunctionExpression
-            //      new MemberExpression Arguments?
-            //
-            //   MemberExpression : See 11.2
-            //      PrimaryExpression
-            //      MemberExpression[Expression]
-            //      MemberExpression.IdentifierName
-            //
-            //   CallExpression : See 11.2
-            //      MemberExpression
-            //      CallExpression Arguments
-            //      CallExpression[Expression]
-            //      CallExpression.IdentifierName
-            //
-            // Technically this is ambiguous.  i.e. CallExpression defines:
-            //
-            //   CallExpression:
-            //      CallExpression Arguments
-            //
-            // If you see: "new Foo()"
-            //
-            // Then that could be treated as a single ObjectCreationExpression, or it could be
-            // treated as the invocation of "new Foo".  We disambiguate that in code (to match
-            // the original grammar) by making sure that if we see an ObjectCreationExpression
-            // we always consume arguments if they are there. So we treat "new Foo()" as an
-            // object creation only, and not at all as an invocation.  Another way to think
-            // about this is that for every "new" that we see, we will consume an argument list if
-            // it is there as part of the *associated* object creation node.  Any additional
-            // argument lists we see, will become invocation expressions.
-            //
-            // Because there are no other places in the grammar now that refer to FunctionExpression
-            // or ObjectCreationExpression, it is safe to push down into the PrimaryExpression
-            // production.
-            //
-            // Because CallExpression and MemberExpression are left recursive, we need to bottom out
-            // of the recursion immediately.  So we parse out a primary expression to start with.
             var expression = parsePrimaryExpression();
             return parseMemberExpressionRest(expression);
         }
         function parseSuperExpression() {
             var expression = parseTokenNode();
-            if (token() === 19 /* OpenParenToken */ || token() === 23 /* DotToken */ || token() === 21 /* OpenBracketToken */) {
+            if (token() === 19 || token() === 23 || token() === 21) {
                 return expression;
             }
-            // If we have seen "super" it must be followed by '(' or '.'.
-            // If it wasn't then just try to parse out a '.' and report an error.
-            var node = createNode(185 /* PropertyAccessExpression */, expression.pos);
+            var node = createNode(185, expression.pos);
             node.expression = expression;
-            parseExpectedToken(23 /* DotToken */, ts.Diagnostics.super_must_be_followed_by_an_argument_list_or_member_access);
-            node.name = parseRightSideOfDot(/*allowIdentifierNames*/ true);
+            parseExpectedToken(23, ts.Diagnostics.super_must_be_followed_by_an_argument_list_or_member_access);
+            node.name = parseRightSideOfDot(true);
             return finishNode(node);
         }
         function parseJsxElementOrSelfClosingElementOrFragment(inExpressionContext) {
             var opening = parseJsxOpeningOrSelfClosingElementOrOpeningFragment(inExpressionContext);
             var result;
-            if (opening.kind === 257 /* JsxOpeningElement */) {
-                var node = createNode(255 /* JsxElement */, opening.pos);
+            if (opening.kind === 257) {
+                var node = createNode(255, opening.pos);
                 node.openingElement = opening;
                 node.children = parseJsxChildren(node.openingElement);
                 node.closingElement = parseJsxClosingElement(inExpressionContext);
@@ -18667,34 +14812,26 @@ var ts;
                 }
                 result = finishNode(node);
             }
-            else if (opening.kind === 260 /* JsxOpeningFragment */) {
-                var node = createNode(259 /* JsxFragment */, opening.pos);
+            else if (opening.kind === 260) {
+                var node = createNode(259, opening.pos);
                 node.openingFragment = opening;
                 node.children = parseJsxChildren(node.openingFragment);
                 node.closingFragment = parseJsxClosingFragment(inExpressionContext);
                 result = finishNode(node);
             }
             else {
-                ts.Debug.assert(opening.kind === 256 /* JsxSelfClosingElement */);
-                // Nothing else to do for self-closing elements
+                ts.Debug.assert(opening.kind === 256);
                 result = opening;
             }
-            // If the user writes the invalid code '<div></div><div></div>' in an expression context (i.e. not wrapped in
-            // an enclosing tag), we'll naively try to parse   ^ this as a 'less than' operator and the remainder of the tag
-            // as garbage, which will cause the formatter to badly mangle the JSX. Perform a speculative parse of a JSX
-            // element if we see a < token so that we can wrap it in a synthetic binary expression so the formatter
-            // does less damage and we can report a better error.
-            // Since JSX elements are invalid < operands anyway, this lookahead parse will only occur in error scenarios
-            // of one sort or another.
-            if (inExpressionContext && token() === 27 /* LessThanToken */) {
-                var invalidElement = tryParse(function () { return parseJsxElementOrSelfClosingElementOrFragment(/*inExpressionContext*/ true); });
+            if (inExpressionContext && token() === 27) {
+                var invalidElement = tryParse(function () { return parseJsxElementOrSelfClosingElementOrFragment(true); });
                 if (invalidElement) {
                     parseErrorAtCurrentToken(ts.Diagnostics.JSX_expressions_must_have_one_parent_element);
-                    var badNode = createNode(200 /* BinaryExpression */, result.pos);
+                    var badNode = createNode(200, result.pos);
                     badNode.end = invalidElement.end;
                     badNode.left = result;
                     badNode.right = invalidElement;
-                    badNode.operatorToken = createMissingNode(26 /* CommaToken */, /*reportAtCurrentPosition*/ false, /*diagnosticMessage*/ undefined); // TODO: GH#18217
+                    badNode.operatorToken = createMissingNode(26, false, undefined);
                     badNode.operatorToken.pos = badNode.operatorToken.end = badNode.right.pos;
                     return badNode;
                 }
@@ -18702,16 +14839,14 @@ var ts;
             return result;
         }
         function parseJsxText() {
-            var node = createNode(10 /* JsxText */);
-            node.containsOnlyWhiteSpaces = currentToken === 11 /* JsxTextAllWhiteSpaces */;
+            var node = createNode(10);
+            node.containsOnlyWhiteSpaces = currentToken === 11;
             currentToken = scanner.scanJsxToken();
             return finishNode(node);
         }
         function parseJsxChild(openingTag, token) {
             switch (token) {
-                case 1 /* EndOfFileToken */:
-                    // If we hit EOF, issue the error at the tag that lacks the closing element
-                    // rather than at the end of the file (which is useless)
+                case 1:
                     if (ts.isJsxOpeningFragment(openingTag)) {
                         parseErrorAtRange(openingTag, ts.Diagnostics.JSX_fragment_has_no_corresponding_closing_tag);
                     }
@@ -18719,16 +14854,16 @@ var ts;
                         parseErrorAtRange(openingTag.tagName, ts.Diagnostics.JSX_element_0_has_no_corresponding_closing_tag, ts.getTextOfNodeFromSourceText(sourceText, openingTag.tagName));
                     }
                     return undefined;
-                case 28 /* LessThanSlashToken */:
-                case 7 /* ConflictMarkerTrivia */:
+                case 28:
+                case 7:
                     return undefined;
-                case 10 /* JsxText */:
-                case 11 /* JsxTextAllWhiteSpaces */:
+                case 10:
+                case 11:
                     return parseJsxText();
-                case 17 /* OpenBraceToken */:
-                    return parseJsxExpression(/*inExpressionContext*/ false);
-                case 27 /* LessThanToken */:
-                    return parseJsxElementOrSelfClosingElementOrFragment(/*inExpressionContext*/ false);
+                case 17:
+                    return parseJsxExpression(false);
+                case 27:
+                    return parseJsxElementOrSelfClosingElementOrFragment(false);
                 default:
                     return ts.Debug.assertNever(token);
             }
@@ -18737,7 +14872,7 @@ var ts;
             var list = [];
             var listPos = getNodePos();
             var saveParsingContext = parsingContext;
-            parsingContext |= 1 << 14 /* JsxChildren */;
+            parsingContext |= 1 << 14;
             while (true) {
                 var child = parseJsxChild(openingTag, currentToken = scanner.reScanJsxToken());
                 if (!child)
@@ -18748,16 +14883,15 @@ var ts;
             return createNodeArray(list, listPos);
         }
         function parseJsxAttributes() {
-            var jsxAttributes = createNode(263 /* JsxAttributes */);
-            jsxAttributes.properties = parseList(13 /* JsxAttributes */, parseJsxAttribute);
+            var jsxAttributes = createNode(263);
+            jsxAttributes.properties = parseList(13, parseJsxAttribute);
             return finishNode(jsxAttributes);
         }
         function parseJsxOpeningOrSelfClosingElementOrOpeningFragment(inExpressionContext) {
             var fullStart = scanner.getStartPos();
-            parseExpected(27 /* LessThanToken */);
-            if (token() === 29 /* GreaterThanToken */) {
-                // See below for explanation of scanJsxText
-                var node_1 = createNode(260 /* JsxOpeningFragment */, fullStart);
+            parseExpected(27);
+            if (token() === 29) {
+                var node_1 = createNode(260, fullStart);
                 scanJsxText();
                 return finishNode(node_1);
             }
@@ -18765,23 +14899,20 @@ var ts;
             var typeArguments = tryParseTypeArguments();
             var attributes = parseJsxAttributes();
             var node;
-            if (token() === 29 /* GreaterThanToken */) {
-                // Closing tag, so scan the immediately-following text with the JSX scanning instead
-                // of regular scanning to avoid treating illegal characters (e.g. '#') as immediate
-                // scanning errors
-                node = createNode(257 /* JsxOpeningElement */, fullStart);
+            if (token() === 29) {
+                node = createNode(257, fullStart);
                 scanJsxText();
             }
             else {
-                parseExpected(41 /* SlashToken */);
+                parseExpected(41);
                 if (inExpressionContext) {
-                    parseExpected(29 /* GreaterThanToken */);
+                    parseExpected(29);
                 }
                 else {
-                    parseExpected(29 /* GreaterThanToken */, /*diagnostic*/ undefined, /*shouldAdvance*/ false);
+                    parseExpected(29, undefined, false);
                     scanJsxText();
                 }
-                node = createNode(256 /* JsxSelfClosingElement */, fullStart);
+                node = createNode(256, fullStart);
             }
             node.tagName = tagName;
             node.typeArguments = typeArguments;
@@ -18790,125 +14921,119 @@ var ts;
         }
         function parseJsxElementName() {
             scanJsxIdentifier();
-            // JsxElement can have name in the form of
-            //      propertyAccessExpression
-            //      primaryExpression in the form of an identifier and "this" keyword
-            // We can't just simply use parseLeftHandSideExpressionOrHigher because then we will start consider class,function etc as a keyword
-            // We only want to consider "this" as a primaryExpression
-            var expression = token() === 99 /* ThisKeyword */ ?
+            var expression = token() === 99 ?
                 parseTokenNode() : parseIdentifierName();
-            while (parseOptional(23 /* DotToken */)) {
-                var propertyAccess = createNode(185 /* PropertyAccessExpression */, expression.pos);
+            while (parseOptional(23)) {
+                var propertyAccess = createNode(185, expression.pos);
                 propertyAccess.expression = expression;
-                propertyAccess.name = parseRightSideOfDot(/*allowIdentifierNames*/ true);
+                propertyAccess.name = parseRightSideOfDot(true);
                 expression = finishNode(propertyAccess);
             }
             return expression;
         }
         function parseJsxExpression(inExpressionContext) {
-            var node = createNode(265 /* JsxExpression */);
-            if (!parseExpected(17 /* OpenBraceToken */)) {
+            var node = createNode(265);
+            if (!parseExpected(17)) {
                 return undefined;
             }
-            if (token() !== 18 /* CloseBraceToken */) {
-                node.dotDotDotToken = parseOptionalToken(24 /* DotDotDotToken */);
+            if (token() !== 18) {
+                node.dotDotDotToken = parseOptionalToken(24);
                 node.expression = parseAssignmentExpressionOrHigher();
             }
             if (inExpressionContext) {
-                parseExpected(18 /* CloseBraceToken */);
+                parseExpected(18);
             }
             else {
-                parseExpected(18 /* CloseBraceToken */, /*message*/ undefined, /*shouldAdvance*/ false);
+                parseExpected(18, undefined, false);
                 scanJsxText();
             }
             return finishNode(node);
         }
         function parseJsxAttribute() {
-            if (token() === 17 /* OpenBraceToken */) {
+            if (token() === 17) {
                 return parseJsxSpreadAttribute();
             }
             scanJsxIdentifier();
-            var node = createNode(262 /* JsxAttribute */);
+            var node = createNode(262);
             node.name = parseIdentifierName();
-            if (token() === 58 /* EqualsToken */) {
+            if (token() === 58) {
                 switch (scanJsxAttributeValue()) {
-                    case 9 /* StringLiteral */:
+                    case 9:
                         node.initializer = parseLiteralNode();
                         break;
                     default:
-                        node.initializer = parseJsxExpression(/*inExpressionContext*/ true);
+                        node.initializer = parseJsxExpression(true);
                         break;
                 }
             }
             return finishNode(node);
         }
         function parseJsxSpreadAttribute() {
-            var node = createNode(264 /* JsxSpreadAttribute */);
-            parseExpected(17 /* OpenBraceToken */);
-            parseExpected(24 /* DotDotDotToken */);
+            var node = createNode(264);
+            parseExpected(17);
+            parseExpected(24);
             node.expression = parseExpression();
-            parseExpected(18 /* CloseBraceToken */);
+            parseExpected(18);
             return finishNode(node);
         }
         function parseJsxClosingElement(inExpressionContext) {
-            var node = createNode(258 /* JsxClosingElement */);
-            parseExpected(28 /* LessThanSlashToken */);
+            var node = createNode(258);
+            parseExpected(28);
             node.tagName = parseJsxElementName();
             if (inExpressionContext) {
-                parseExpected(29 /* GreaterThanToken */);
+                parseExpected(29);
             }
             else {
-                parseExpected(29 /* GreaterThanToken */, /*diagnostic*/ undefined, /*shouldAdvance*/ false);
+                parseExpected(29, undefined, false);
                 scanJsxText();
             }
             return finishNode(node);
         }
         function parseJsxClosingFragment(inExpressionContext) {
-            var node = createNode(261 /* JsxClosingFragment */);
-            parseExpected(28 /* LessThanSlashToken */);
+            var node = createNode(261);
+            parseExpected(28);
             if (ts.tokenIsIdentifierOrKeyword(token())) {
                 parseErrorAtRange(parseJsxElementName(), ts.Diagnostics.Expected_corresponding_closing_tag_for_JSX_fragment);
             }
             if (inExpressionContext) {
-                parseExpected(29 /* GreaterThanToken */);
+                parseExpected(29);
             }
             else {
-                parseExpected(29 /* GreaterThanToken */, /*diagnostic*/ undefined, /*shouldAdvance*/ false);
+                parseExpected(29, undefined, false);
                 scanJsxText();
             }
             return finishNode(node);
         }
         function parseTypeAssertion() {
-            var node = createNode(190 /* TypeAssertionExpression */);
-            parseExpected(27 /* LessThanToken */);
+            var node = createNode(190);
+            parseExpected(27);
             node.type = parseType();
-            parseExpected(29 /* GreaterThanToken */);
+            parseExpected(29);
             node.expression = parseSimpleUnaryExpression();
             return finishNode(node);
         }
         function parseMemberExpressionRest(expression) {
             while (true) {
-                var dotToken = parseOptionalToken(23 /* DotToken */);
+                var dotToken = parseOptionalToken(23);
                 if (dotToken) {
-                    var propertyAccess = createNode(185 /* PropertyAccessExpression */, expression.pos);
+                    var propertyAccess = createNode(185, expression.pos);
                     propertyAccess.expression = expression;
-                    propertyAccess.name = parseRightSideOfDot(/*allowIdentifierNames*/ true);
+                    propertyAccess.name = parseRightSideOfDot(true);
                     expression = finishNode(propertyAccess);
                     continue;
                 }
-                if (token() === 51 /* ExclamationToken */ && !scanner.hasPrecedingLineBreak()) {
+                if (token() === 51 && !scanner.hasPrecedingLineBreak()) {
                     nextToken();
-                    var nonNullExpression = createNode(209 /* NonNullExpression */, expression.pos);
+                    var nonNullExpression = createNode(209, expression.pos);
                     nonNullExpression.expression = expression;
                     expression = finishNode(nonNullExpression);
                     continue;
                 }
-                // when in the [Decorator] context, we do not parse ElementAccess as it could be part of a ComputedPropertyName
-                if (!inDecoratorContext() && parseOptional(21 /* OpenBracketToken */)) {
-                    var indexedAccess = createNode(186 /* ElementAccessExpression */, expression.pos);
+                if (!inDecoratorContext() && parseOptional(21)) {
+                    var indexedAccess = createNode(186, expression.pos);
                     indexedAccess.expression = expression;
-                    if (token() === 22 /* CloseBracketToken */) {
-                        indexedAccess.argumentExpression = createMissingNode(71 /* Identifier */, /*reportAtCurrentPosition*/ true, ts.Diagnostics.An_element_access_expression_should_take_an_argument);
+                    if (token() === 22) {
+                        indexedAccess.argumentExpression = createMissingNode(71, true, ts.Diagnostics.An_element_access_expression_should_take_an_argument);
                     }
                     else {
                         var argument = allowInAnd(parseExpression);
@@ -18917,25 +15042,25 @@ var ts;
                         }
                         indexedAccess.argumentExpression = argument;
                     }
-                    parseExpected(22 /* CloseBracketToken */);
+                    parseExpected(22);
                     expression = finishNode(indexedAccess);
                     continue;
                 }
                 if (isTemplateStartOfTaggedTemplate()) {
-                    expression = parseTaggedTemplateRest(expression, /*typeArguments*/ undefined);
+                    expression = parseTaggedTemplateRest(expression, undefined);
                     continue;
                 }
                 return expression;
             }
         }
         function isTemplateStartOfTaggedTemplate() {
-            return token() === 13 /* NoSubstitutionTemplateLiteral */ || token() === 14 /* TemplateHead */;
+            return token() === 13 || token() === 14;
         }
         function parseTaggedTemplateRest(tag, typeArguments) {
-            var tagExpression = createNode(189 /* TaggedTemplateExpression */, tag.pos);
+            var tagExpression = createNode(189, tag.pos);
             tagExpression.tag = tag;
             tagExpression.typeArguments = typeArguments;
-            tagExpression.template = token() === 13 /* NoSubstitutionTemplateLiteral */
+            tagExpression.template = token() === 13
                 ? parseLiteralNode()
                 : parseTemplateExpression();
             return finishNode(tagExpression);
@@ -18943,11 +15068,7 @@ var ts;
         function parseCallExpressionRest(expression) {
             while (true) {
                 expression = parseMemberExpressionRest(expression);
-                if (token() === 27 /* LessThanToken */) {
-                    // See if this is the start of a generic invocation.  If so, consume it and
-                    // keep checking for postfix expressions.  Otherwise, it's just a '<' that's
-                    // part of an arithmetic expression.  Break out so we consume it higher in the
-                    // stack.
+                if (token() === 27) {
                     var typeArguments = tryParse(parseTypeArgumentsInExpression);
                     if (!typeArguments) {
                         return expression;
@@ -18956,15 +15077,15 @@ var ts;
                         expression = parseTaggedTemplateRest(expression, typeArguments);
                         continue;
                     }
-                    var callExpr = createNode(187 /* CallExpression */, expression.pos);
+                    var callExpr = createNode(187, expression.pos);
                     callExpr.expression = expression;
                     callExpr.typeArguments = typeArguments;
                     callExpr.arguments = parseArgumentList();
                     expression = finishNode(callExpr);
                     continue;
                 }
-                else if (token() === 19 /* OpenParenToken */) {
-                    var callExpr = createNode(187 /* CallExpression */, expression.pos);
+                else if (token() === 19) {
+                    var callExpr = createNode(187, expression.pos);
                     callExpr.expression = expression;
                     callExpr.arguments = parseArgumentList();
                     expression = finishNode(callExpr);
@@ -18974,217 +15095,191 @@ var ts;
             }
         }
         function parseArgumentList() {
-            parseExpected(19 /* OpenParenToken */);
-            var result = parseDelimitedList(11 /* ArgumentExpressions */, parseArgumentExpression);
-            parseExpected(20 /* CloseParenToken */);
+            parseExpected(19);
+            var result = parseDelimitedList(11, parseArgumentExpression);
+            parseExpected(20);
             return result;
         }
         function parseTypeArgumentsInExpression() {
-            if (!parseOptional(27 /* LessThanToken */)) {
+            if (!parseOptional(27)) {
                 return undefined;
             }
-            var typeArguments = parseDelimitedList(19 /* TypeArguments */, parseType);
-            if (!parseExpected(29 /* GreaterThanToken */)) {
-                // If it doesn't have the closing `>` then it's definitely not an type argument list.
+            var typeArguments = parseDelimitedList(19, parseType);
+            if (!parseExpected(29)) {
                 return undefined;
             }
-            // If we have a '<', then only parse this as a argument list if the type arguments
-            // are complete and we have an open paren.  if we don't, rewind and return nothing.
             return typeArguments && canFollowTypeArgumentsInExpression()
                 ? typeArguments
                 : undefined;
         }
         function canFollowTypeArgumentsInExpression() {
             switch (token()) {
-                case 19 /* OpenParenToken */: // foo<x>(
-                case 13 /* NoSubstitutionTemplateLiteral */: // foo<T> `...`
-                case 14 /* TemplateHead */: // foo<T> `...${100}...`
-                // these are the only tokens can legally follow a type argument
-                // list. So we definitely want to treat them as type arg lists.
-                case 23 /* DotToken */: // foo<x>.
-                case 20 /* CloseParenToken */: // foo<x>)
-                case 22 /* CloseBracketToken */: // foo<x>]
-                case 56 /* ColonToken */: // foo<x>:
-                case 25 /* SemicolonToken */: // foo<x>;
-                case 55 /* QuestionToken */: // foo<x>?
-                case 32 /* EqualsEqualsToken */: // foo<x> ==
-                case 34 /* EqualsEqualsEqualsToken */: // foo<x> ===
-                case 33 /* ExclamationEqualsToken */: // foo<x> !=
-                case 35 /* ExclamationEqualsEqualsToken */: // foo<x> !==
-                case 53 /* AmpersandAmpersandToken */: // foo<x> &&
-                case 54 /* BarBarToken */: // foo<x> ||
-                case 50 /* CaretToken */: // foo<x> ^
-                case 48 /* AmpersandToken */: // foo<x> &
-                case 49 /* BarToken */: // foo<x> |
-                case 18 /* CloseBraceToken */: // foo<x> }
-                case 1 /* EndOfFileToken */: // foo<x>
-                    // these cases can't legally follow a type arg list.  However, they're not legal
-                    // expressions either.  The user is probably in the middle of a generic type. So
-                    // treat it as such.
+                case 19:
+                case 13:
+                case 14:
+                case 23:
+                case 20:
+                case 22:
+                case 56:
+                case 25:
+                case 55:
+                case 32:
+                case 34:
+                case 33:
+                case 35:
+                case 53:
+                case 54:
+                case 50:
+                case 48:
+                case 49:
+                case 18:
+                case 1:
                     return true;
-                case 26 /* CommaToken */: // foo<x>,
-                case 17 /* OpenBraceToken */: // foo<x> {
-                // We don't want to treat these as type arguments.  Otherwise we'll parse this
-                // as an invocation expression.  Instead, we want to parse out the expression
-                // in isolation from the type arguments.
+                case 26:
+                case 17:
                 default:
-                    // Anything else treat as an expression.
                     return false;
             }
         }
         function parsePrimaryExpression() {
             switch (token()) {
-                case 8 /* NumericLiteral */:
-                case 9 /* StringLiteral */:
-                case 13 /* NoSubstitutionTemplateLiteral */:
+                case 8:
+                case 9:
+                case 13:
                     return parseLiteralNode();
-                case 99 /* ThisKeyword */:
-                case 97 /* SuperKeyword */:
-                case 95 /* NullKeyword */:
-                case 101 /* TrueKeyword */:
-                case 86 /* FalseKeyword */:
+                case 99:
+                case 97:
+                case 95:
+                case 101:
+                case 86:
                     return parseTokenNode();
-                case 19 /* OpenParenToken */:
+                case 19:
                     return parseParenthesizedExpression();
-                case 21 /* OpenBracketToken */:
+                case 21:
                     return parseArrayLiteralExpression();
-                case 17 /* OpenBraceToken */:
+                case 17:
                     return parseObjectLiteralExpression();
-                case 120 /* AsyncKeyword */:
-                    // Async arrow functions are parsed earlier in parseAssignmentExpressionOrHigher.
-                    // If we encounter `async [no LineTerminator here] function` then this is an async
-                    // function; otherwise, its an identifier.
+                case 120:
                     if (!lookAhead(nextTokenIsFunctionKeywordOnSameLine)) {
                         break;
                     }
                     return parseFunctionExpression();
-                case 75 /* ClassKeyword */:
+                case 75:
                     return parseClassExpression();
-                case 89 /* FunctionKeyword */:
+                case 89:
                     return parseFunctionExpression();
-                case 94 /* NewKeyword */:
+                case 94:
                     return parseNewExpressionOrNewDotTarget();
-                case 41 /* SlashToken */:
-                case 63 /* SlashEqualsToken */:
-                    if (reScanSlashToken() === 12 /* RegularExpressionLiteral */) {
+                case 41:
+                case 63:
+                    if (reScanSlashToken() === 12) {
                         return parseLiteralNode();
                     }
                     break;
-                case 14 /* TemplateHead */:
+                case 14:
                     return parseTemplateExpression();
             }
             return parseIdentifier(ts.Diagnostics.Expression_expected);
         }
         function parseParenthesizedExpression() {
-            var node = createNodeWithJSDoc(191 /* ParenthesizedExpression */);
-            parseExpected(19 /* OpenParenToken */);
+            var node = createNodeWithJSDoc(191);
+            parseExpected(19);
             node.expression = allowInAnd(parseExpression);
-            parseExpected(20 /* CloseParenToken */);
+            parseExpected(20);
             return finishNode(node);
         }
         function parseSpreadElement() {
-            var node = createNode(204 /* SpreadElement */);
-            parseExpected(24 /* DotDotDotToken */);
+            var node = createNode(204);
+            parseExpected(24);
             node.expression = parseAssignmentExpressionOrHigher();
             return finishNode(node);
         }
         function parseArgumentOrArrayLiteralElement() {
-            return token() === 24 /* DotDotDotToken */ ? parseSpreadElement() :
-                token() === 26 /* CommaToken */ ? createNode(206 /* OmittedExpression */) :
+            return token() === 24 ? parseSpreadElement() :
+                token() === 26 ? createNode(206) :
                     parseAssignmentExpressionOrHigher();
         }
         function parseArgumentExpression() {
             return doOutsideOfContext(disallowInAndDecoratorContext, parseArgumentOrArrayLiteralElement);
         }
         function parseArrayLiteralExpression() {
-            var node = createNode(183 /* ArrayLiteralExpression */);
-            parseExpected(21 /* OpenBracketToken */);
+            var node = createNode(183);
+            parseExpected(21);
             if (scanner.hasPrecedingLineBreak()) {
                 node.multiLine = true;
             }
-            node.elements = parseDelimitedList(15 /* ArrayLiteralMembers */, parseArgumentOrArrayLiteralElement);
-            parseExpected(22 /* CloseBracketToken */);
+            node.elements = parseDelimitedList(15, parseArgumentOrArrayLiteralElement);
+            parseExpected(22);
             return finishNode(node);
         }
         function parseObjectLiteralElement() {
-            var node = createNodeWithJSDoc(0 /* Unknown */);
-            if (parseOptionalToken(24 /* DotDotDotToken */)) {
-                node.kind = 272 /* SpreadAssignment */;
+            var node = createNodeWithJSDoc(0);
+            if (parseOptionalToken(24)) {
+                node.kind = 272;
                 node.expression = parseAssignmentExpressionOrHigher();
                 return finishNode(node);
             }
             node.decorators = parseDecorators();
             node.modifiers = parseModifiers();
-            if (parseContextualModifier(125 /* GetKeyword */)) {
-                return parseAccessorDeclaration(node, 156 /* GetAccessor */);
+            if (parseContextualModifier(125)) {
+                return parseAccessorDeclaration(node, 156);
             }
-            if (parseContextualModifier(136 /* SetKeyword */)) {
-                return parseAccessorDeclaration(node, 157 /* SetAccessor */);
+            if (parseContextualModifier(136)) {
+                return parseAccessorDeclaration(node, 157);
             }
-            var asteriskToken = parseOptionalToken(39 /* AsteriskToken */);
+            var asteriskToken = parseOptionalToken(39);
             var tokenIsIdentifier = isIdentifier();
             node.name = parsePropertyName();
-            // Disallowing of optional property assignments happens in the grammar checker.
-            node.questionToken = parseOptionalToken(55 /* QuestionToken */);
-            if (asteriskToken || token() === 19 /* OpenParenToken */ || token() === 27 /* LessThanToken */) {
+            node.questionToken = parseOptionalToken(55);
+            if (asteriskToken || token() === 19 || token() === 27) {
                 return parseMethodDeclaration(node, asteriskToken);
             }
-            // check if it is short-hand property assignment or normal property assignment
-            // NOTE: if token is EqualsToken it is interpreted as CoverInitializedName production
-            // CoverInitializedName[Yield] :
-            //     IdentifierReference[?Yield] Initializer[In, ?Yield]
-            // this is necessary because ObjectLiteral productions are also used to cover grammar for ObjectAssignmentPattern
-            var isShorthandPropertyAssignment = tokenIsIdentifier && (token() === 26 /* CommaToken */ || token() === 18 /* CloseBraceToken */ || token() === 58 /* EqualsToken */);
+            var isShorthandPropertyAssignment = tokenIsIdentifier && (token() === 26 || token() === 18 || token() === 58);
             if (isShorthandPropertyAssignment) {
-                node.kind = 271 /* ShorthandPropertyAssignment */;
-                var equalsToken = parseOptionalToken(58 /* EqualsToken */);
+                node.kind = 271;
+                var equalsToken = parseOptionalToken(58);
                 if (equalsToken) {
                     node.equalsToken = equalsToken;
                     node.objectAssignmentInitializer = allowInAnd(parseAssignmentExpressionOrHigher);
                 }
             }
             else {
-                node.kind = 270 /* PropertyAssignment */;
-                parseExpected(56 /* ColonToken */);
+                node.kind = 270;
+                parseExpected(56);
                 node.initializer = allowInAnd(parseAssignmentExpressionOrHigher);
             }
             return finishNode(node);
         }
         function parseObjectLiteralExpression() {
-            var node = createNode(184 /* ObjectLiteralExpression */);
-            parseExpected(17 /* OpenBraceToken */);
+            var node = createNode(184);
+            parseExpected(17);
             if (scanner.hasPrecedingLineBreak()) {
                 node.multiLine = true;
             }
-            node.properties = parseDelimitedList(12 /* ObjectLiteralMembers */, parseObjectLiteralElement, /*considerSemicolonAsDelimiter*/ true);
-            parseExpected(18 /* CloseBraceToken */);
+            node.properties = parseDelimitedList(12, parseObjectLiteralElement, true);
+            parseExpected(18);
             return finishNode(node);
         }
         function parseFunctionExpression() {
-            // GeneratorExpression:
-            //      function* BindingIdentifier [Yield][opt](FormalParameters[Yield]){ GeneratorBody }
-            //
-            // FunctionExpression:
-            //      function BindingIdentifier[opt](FormalParameters){ FunctionBody }
             var saveDecoratorContext = inDecoratorContext();
             if (saveDecoratorContext) {
-                setDecoratorContext(/*val*/ false);
+                setDecoratorContext(false);
             }
-            var node = createNodeWithJSDoc(192 /* FunctionExpression */);
+            var node = createNodeWithJSDoc(192);
             node.modifiers = parseModifiers();
-            parseExpected(89 /* FunctionKeyword */);
-            node.asteriskToken = parseOptionalToken(39 /* AsteriskToken */);
-            var isGenerator = node.asteriskToken ? 1 /* Yield */ : 0 /* None */;
-            var isAsync = ts.hasModifier(node, 256 /* Async */) ? 2 /* Await */ : 0 /* None */;
+            parseExpected(89);
+            node.asteriskToken = parseOptionalToken(39);
+            var isGenerator = node.asteriskToken ? 1 : 0;
+            var isAsync = ts.hasModifier(node, 256) ? 2 : 0;
             node.name =
                 isGenerator && isAsync ? doInYieldAndAwaitContext(parseOptionalIdentifier) :
                     isGenerator ? doInYieldContext(parseOptionalIdentifier) :
                         isAsync ? doInAwaitContext(parseOptionalIdentifier) :
                             parseOptionalIdentifier();
-            fillSignature(56 /* ColonToken */, isGenerator | isAsync, node);
+            fillSignature(56, isGenerator | isAsync, node);
             node.body = parseFunctionBlock(isGenerator | isAsync);
             if (saveDecoratorContext) {
-                setDecoratorContext(/*val*/ true);
+                setDecoratorContext(true);
             }
             return finishNode(node);
         }
@@ -19193,10 +15288,10 @@ var ts;
         }
         function parseNewExpressionOrNewDotTarget() {
             var fullStart = scanner.getStartPos();
-            parseExpected(94 /* NewKeyword */);
-            if (parseOptional(23 /* DotToken */)) {
-                var node_2 = createNode(210 /* MetaProperty */, fullStart);
-                node_2.keywordToken = 94 /* NewKeyword */;
+            parseExpected(94);
+            if (parseOptional(23)) {
+                var node_2 = createNode(210, fullStart);
+                node_2.keywordToken = 94;
                 node_2.name = parseIdentifierName();
                 return finishNode(node_2);
             }
@@ -19212,23 +15307,22 @@ var ts;
                 }
                 break;
             }
-            var node = createNode(188 /* NewExpression */, fullStart);
+            var node = createNode(188, fullStart);
             node.expression = expression;
             node.typeArguments = typeArguments;
-            if (node.typeArguments || token() === 19 /* OpenParenToken */) {
+            if (node.typeArguments || token() === 19) {
                 node.arguments = parseArgumentList();
             }
             return finishNode(node);
         }
-        // STATEMENTS
         function parseBlock(ignoreMissingOpenBrace, diagnosticMessage) {
-            var node = createNode(213 /* Block */);
-            if (parseExpected(17 /* OpenBraceToken */, diagnosticMessage) || ignoreMissingOpenBrace) {
+            var node = createNode(213);
+            if (parseExpected(17, diagnosticMessage) || ignoreMissingOpenBrace) {
                 if (scanner.hasPrecedingLineBreak()) {
                     node.multiLine = true;
                 }
-                node.statements = parseList(1 /* BlockStatements */, parseStatement);
-                parseExpected(18 /* CloseBraceToken */);
+                node.statements = parseList(1, parseStatement);
+                parseExpected(18);
             }
             else {
                 node.statements = createMissingList();
@@ -19237,104 +15331,98 @@ var ts;
         }
         function parseFunctionBlock(flags, diagnosticMessage) {
             var savedYieldContext = inYieldContext();
-            setYieldContext(!!(flags & 1 /* Yield */));
+            setYieldContext(!!(flags & 1));
             var savedAwaitContext = inAwaitContext();
-            setAwaitContext(!!(flags & 2 /* Await */));
-            // We may be in a [Decorator] context when parsing a function expression or
-            // arrow function. The body of the function is not in [Decorator] context.
+            setAwaitContext(!!(flags & 2));
             var saveDecoratorContext = inDecoratorContext();
             if (saveDecoratorContext) {
-                setDecoratorContext(/*val*/ false);
+                setDecoratorContext(false);
             }
-            var block = parseBlock(!!(flags & 16 /* IgnoreMissingOpenBrace */), diagnosticMessage);
+            var block = parseBlock(!!(flags & 16), diagnosticMessage);
             if (saveDecoratorContext) {
-                setDecoratorContext(/*val*/ true);
+                setDecoratorContext(true);
             }
             setYieldContext(savedYieldContext);
             setAwaitContext(savedAwaitContext);
             return block;
         }
         function parseEmptyStatement() {
-            var node = createNode(215 /* EmptyStatement */);
-            parseExpected(25 /* SemicolonToken */);
+            var node = createNode(215);
+            parseExpected(25);
             return finishNode(node);
         }
         function parseIfStatement() {
-            var node = createNode(217 /* IfStatement */);
-            parseExpected(90 /* IfKeyword */);
-            parseExpected(19 /* OpenParenToken */);
+            var node = createNode(217);
+            parseExpected(90);
+            parseExpected(19);
             node.expression = allowInAnd(parseExpression);
-            parseExpected(20 /* CloseParenToken */);
+            parseExpected(20);
             node.thenStatement = parseStatement();
-            node.elseStatement = parseOptional(82 /* ElseKeyword */) ? parseStatement() : undefined;
+            node.elseStatement = parseOptional(82) ? parseStatement() : undefined;
             return finishNode(node);
         }
         function parseDoStatement() {
-            var node = createNode(218 /* DoStatement */);
-            parseExpected(81 /* DoKeyword */);
+            var node = createNode(218);
+            parseExpected(81);
             node.statement = parseStatement();
-            parseExpected(106 /* WhileKeyword */);
-            parseExpected(19 /* OpenParenToken */);
+            parseExpected(106);
+            parseExpected(19);
             node.expression = allowInAnd(parseExpression);
-            parseExpected(20 /* CloseParenToken */);
-            // From: https://mail.mozilla.org/pipermail/es-discuss/2011-August/016188.html
-            // 157 min --- All allen at wirfs-brock.com CONF --- "do{;}while(false)false" prohibited in
-            // spec but allowed in consensus reality. Approved -- this is the de-facto standard whereby
-            //  do;while(0)x will have a semicolon inserted before x.
-            parseOptional(25 /* SemicolonToken */);
+            parseExpected(20);
+            parseOptional(25);
             return finishNode(node);
         }
         function parseWhileStatement() {
-            var node = createNode(219 /* WhileStatement */);
-            parseExpected(106 /* WhileKeyword */);
-            parseExpected(19 /* OpenParenToken */);
+            var node = createNode(219);
+            parseExpected(106);
+            parseExpected(19);
             node.expression = allowInAnd(parseExpression);
-            parseExpected(20 /* CloseParenToken */);
+            parseExpected(20);
             node.statement = parseStatement();
             return finishNode(node);
         }
         function parseForOrForInOrForOfStatement() {
             var pos = getNodePos();
-            parseExpected(88 /* ForKeyword */);
-            var awaitToken = parseOptionalToken(121 /* AwaitKeyword */);
-            parseExpected(19 /* OpenParenToken */);
+            parseExpected(88);
+            var awaitToken = parseOptionalToken(121);
+            parseExpected(19);
             var initializer;
-            if (token() !== 25 /* SemicolonToken */) {
-                if (token() === 104 /* VarKeyword */ || token() === 110 /* LetKeyword */ || token() === 76 /* ConstKeyword */) {
-                    initializer = parseVariableDeclarationList(/*inForStatementInitializer*/ true);
+            if (token() !== 25) {
+                if (token() === 104 || token() === 110 || token() === 76) {
+                    initializer = parseVariableDeclarationList(true);
                 }
                 else {
                     initializer = disallowInAnd(parseExpression);
                 }
             }
             var forOrForInOrForOfStatement;
-            if (awaitToken ? parseExpected(145 /* OfKeyword */) : parseOptional(145 /* OfKeyword */)) {
-                var forOfStatement = createNode(222 /* ForOfStatement */, pos);
+            if (awaitToken ? parseExpected(145) : parseOptional(145)) {
+                var forOfStatement = createNode(222, pos);
                 forOfStatement.awaitModifier = awaitToken;
                 forOfStatement.initializer = initializer;
                 forOfStatement.expression = allowInAnd(parseAssignmentExpressionOrHigher);
-                parseExpected(20 /* CloseParenToken */);
+                parseExpected(20);
                 forOrForInOrForOfStatement = forOfStatement;
             }
-            else if (parseOptional(92 /* InKeyword */)) {
-                var forInStatement = createNode(221 /* ForInStatement */, pos);
+            else if (parseOptional(92)) {
+                var forInStatement = createNode(221, pos);
                 forInStatement.initializer = initializer;
                 forInStatement.expression = allowInAnd(parseExpression);
-                parseExpected(20 /* CloseParenToken */);
+                parseExpected(20);
                 forOrForInOrForOfStatement = forInStatement;
             }
             else {
-                var forStatement = createNode(220 /* ForStatement */, pos);
+                var forStatement = createNode(220, pos);
                 forStatement.initializer = initializer;
-                parseExpected(25 /* SemicolonToken */);
-                if (token() !== 25 /* SemicolonToken */ && token() !== 20 /* CloseParenToken */) {
+                parseExpected(25);
+                if (token() !== 25 && token() !== 20) {
                     forStatement.condition = allowInAnd(parseExpression);
                 }
-                parseExpected(25 /* SemicolonToken */);
-                if (token() !== 20 /* CloseParenToken */) {
+                parseExpected(25);
+                if (token() !== 20) {
                     forStatement.incrementor = allowInAnd(parseExpression);
                 }
-                parseExpected(20 /* CloseParenToken */);
+                parseExpected(20);
                 forOrForInOrForOfStatement = forStatement;
             }
             forOrForInOrForOfStatement.statement = parseStatement();
@@ -19342,7 +15430,7 @@ var ts;
         }
         function parseBreakOrContinueStatement(kind) {
             var node = createNode(kind);
-            parseExpected(kind === 224 /* BreakStatement */ ? 72 /* BreakKeyword */ : 77 /* ContinueKeyword */);
+            parseExpected(kind === 224 ? 72 : 77);
             if (!canParseSemicolon()) {
                 node.label = parseIdentifier();
             }
@@ -19350,8 +15438,8 @@ var ts;
             return finishNode(node);
         }
         function parseReturnStatement() {
-            var node = createNode(225 /* ReturnStatement */);
-            parseExpected(96 /* ReturnKeyword */);
+            var node = createNode(225);
+            parseExpected(96);
             if (!canParseSemicolon()) {
                 node.expression = allowInAnd(parseExpression);
             }
@@ -19359,106 +15447,92 @@ var ts;
             return finishNode(node);
         }
         function parseWithStatement() {
-            var node = createNode(226 /* WithStatement */);
-            parseExpected(107 /* WithKeyword */);
-            parseExpected(19 /* OpenParenToken */);
+            var node = createNode(226);
+            parseExpected(107);
+            parseExpected(19);
             node.expression = allowInAnd(parseExpression);
-            parseExpected(20 /* CloseParenToken */);
-            node.statement = doInsideOfContext(8388608 /* InWithStatement */, parseStatement);
+            parseExpected(20);
+            node.statement = doInsideOfContext(8388608, parseStatement);
             return finishNode(node);
         }
         function parseCaseClause() {
-            var node = createNode(266 /* CaseClause */);
-            parseExpected(73 /* CaseKeyword */);
+            var node = createNode(266);
+            parseExpected(73);
             node.expression = allowInAnd(parseExpression);
-            parseExpected(56 /* ColonToken */);
-            node.statements = parseList(3 /* SwitchClauseStatements */, parseStatement);
+            parseExpected(56);
+            node.statements = parseList(3, parseStatement);
             return finishNode(node);
         }
         function parseDefaultClause() {
-            var node = createNode(267 /* DefaultClause */);
-            parseExpected(79 /* DefaultKeyword */);
-            parseExpected(56 /* ColonToken */);
-            node.statements = parseList(3 /* SwitchClauseStatements */, parseStatement);
+            var node = createNode(267);
+            parseExpected(79);
+            parseExpected(56);
+            node.statements = parseList(3, parseStatement);
             return finishNode(node);
         }
         function parseCaseOrDefaultClause() {
-            return token() === 73 /* CaseKeyword */ ? parseCaseClause() : parseDefaultClause();
+            return token() === 73 ? parseCaseClause() : parseDefaultClause();
         }
         function parseSwitchStatement() {
-            var node = createNode(227 /* SwitchStatement */);
-            parseExpected(98 /* SwitchKeyword */);
-            parseExpected(19 /* OpenParenToken */);
+            var node = createNode(227);
+            parseExpected(98);
+            parseExpected(19);
             node.expression = allowInAnd(parseExpression);
-            parseExpected(20 /* CloseParenToken */);
-            var caseBlock = createNode(241 /* CaseBlock */);
-            parseExpected(17 /* OpenBraceToken */);
-            caseBlock.clauses = parseList(2 /* SwitchClauses */, parseCaseOrDefaultClause);
-            parseExpected(18 /* CloseBraceToken */);
+            parseExpected(20);
+            var caseBlock = createNode(241);
+            parseExpected(17);
+            caseBlock.clauses = parseList(2, parseCaseOrDefaultClause);
+            parseExpected(18);
             node.caseBlock = finishNode(caseBlock);
             return finishNode(node);
         }
         function parseThrowStatement() {
-            // ThrowStatement[Yield] :
-            //      throw [no LineTerminator here]Expression[In, ?Yield];
-            // Because of automatic semicolon insertion, we need to report error if this
-            // throw could be terminated with a semicolon.  Note: we can't call 'parseExpression'
-            // directly as that might consume an expression on the following line.
-            // We just return 'undefined' in that case.  The actual error will be reported in the
-            // grammar walker.
-            var node = createNode(229 /* ThrowStatement */);
-            parseExpected(100 /* ThrowKeyword */);
+            var node = createNode(229);
+            parseExpected(100);
             node.expression = scanner.hasPrecedingLineBreak() ? undefined : allowInAnd(parseExpression);
             parseSemicolon();
             return finishNode(node);
         }
-        // TODO: Review for error recovery
         function parseTryStatement() {
-            var node = createNode(230 /* TryStatement */);
-            parseExpected(102 /* TryKeyword */);
-            node.tryBlock = parseBlock(/*ignoreMissingOpenBrace*/ false);
-            node.catchClause = token() === 74 /* CatchKeyword */ ? parseCatchClause() : undefined;
-            // If we don't have a catch clause, then we must have a finally clause.  Try to parse
-            // one out no matter what.
-            if (!node.catchClause || token() === 87 /* FinallyKeyword */) {
-                parseExpected(87 /* FinallyKeyword */);
-                node.finallyBlock = parseBlock(/*ignoreMissingOpenBrace*/ false);
+            var node = createNode(230);
+            parseExpected(102);
+            node.tryBlock = parseBlock(false);
+            node.catchClause = token() === 74 ? parseCatchClause() : undefined;
+            if (!node.catchClause || token() === 87) {
+                parseExpected(87);
+                node.finallyBlock = parseBlock(false);
             }
             return finishNode(node);
         }
         function parseCatchClause() {
-            var result = createNode(269 /* CatchClause */);
-            parseExpected(74 /* CatchKeyword */);
-            if (parseOptional(19 /* OpenParenToken */)) {
+            var result = createNode(269);
+            parseExpected(74);
+            if (parseOptional(19)) {
                 result.variableDeclaration = parseVariableDeclaration();
-                parseExpected(20 /* CloseParenToken */);
+                parseExpected(20);
             }
             else {
-                // Keep shape of node to avoid degrading performance.
                 result.variableDeclaration = undefined;
             }
-            result.block = parseBlock(/*ignoreMissingOpenBrace*/ false);
+            result.block = parseBlock(false);
             return finishNode(result);
         }
         function parseDebuggerStatement() {
-            var node = createNode(231 /* DebuggerStatement */);
-            parseExpected(78 /* DebuggerKeyword */);
+            var node = createNode(231);
+            parseExpected(78);
             parseSemicolon();
             return finishNode(node);
         }
         function parseExpressionOrLabeledStatement() {
-            // Avoiding having to do the lookahead for a labeled statement by just trying to parse
-            // out an expression, seeing if it is identifier and then seeing if it is followed by
-            // a colon.
-            var node = createNodeWithJSDoc(0 /* Unknown */);
+            var node = createNodeWithJSDoc(0);
             var expression = allowInAnd(parseExpression);
-            if (expression.kind === 71 /* Identifier */ && parseOptional(56 /* ColonToken */)) {
-                node.kind = 228 /* LabeledStatement */;
+            if (expression.kind === 71 && parseOptional(56)) {
+                node.kind = 228;
                 node.label = expression;
                 node.statement = parseStatement();
             }
             else {
-                node.kind = 216 /* ExpressionStatement */;
+                node.kind = 216;
                 node.expression = expression;
                 parseSemicolon();
             }
@@ -19470,82 +15544,60 @@ var ts;
         }
         function nextTokenIsClassKeywordOnSameLine() {
             nextToken();
-            return token() === 75 /* ClassKeyword */ && !scanner.hasPrecedingLineBreak();
+            return token() === 75 && !scanner.hasPrecedingLineBreak();
         }
         function nextTokenIsFunctionKeywordOnSameLine() {
             nextToken();
-            return token() === 89 /* FunctionKeyword */ && !scanner.hasPrecedingLineBreak();
+            return token() === 89 && !scanner.hasPrecedingLineBreak();
         }
         function nextTokenIsIdentifierOrKeywordOrLiteralOnSameLine() {
             nextToken();
-            return (ts.tokenIsIdentifierOrKeyword(token()) || token() === 8 /* NumericLiteral */ || token() === 9 /* StringLiteral */) && !scanner.hasPrecedingLineBreak();
+            return (ts.tokenIsIdentifierOrKeyword(token()) || token() === 8 || token() === 9) && !scanner.hasPrecedingLineBreak();
         }
         function isDeclaration() {
             while (true) {
                 switch (token()) {
-                    case 104 /* VarKeyword */:
-                    case 110 /* LetKeyword */:
-                    case 76 /* ConstKeyword */:
-                    case 89 /* FunctionKeyword */:
-                    case 75 /* ClassKeyword */:
-                    case 83 /* EnumKeyword */:
+                    case 104:
+                    case 110:
+                    case 76:
+                    case 89:
+                    case 75:
+                    case 83:
                         return true;
-                    // 'declare', 'module', 'namespace', 'interface'* and 'type' are all legal JavaScript identifiers;
-                    // however, an identifier cannot be followed by another identifier on the same line. This is what we
-                    // count on to parse out the respective declarations. For instance, we exploit this to say that
-                    //
-                    //    namespace n
-                    //
-                    // can be none other than the beginning of a namespace declaration, but need to respect that JavaScript sees
-                    //
-                    //    namespace
-                    //    n
-                    //
-                    // as the identifier 'namespace' on one line followed by the identifier 'n' on another.
-                    // We need to look one token ahead to see if it permissible to try parsing a declaration.
-                    //
-                    // *Note*: 'interface' is actually a strict mode reserved word. So while
-                    //
-                    //   "use strict"
-                    //   interface
-                    //   I {}
-                    //
-                    // could be legal, it would add complexity for very little gain.
-                    case 109 /* InterfaceKeyword */:
-                    case 139 /* TypeKeyword */:
+                    case 109:
+                    case 139:
                         return nextTokenIsIdentifierOnSameLine();
-                    case 129 /* ModuleKeyword */:
-                    case 130 /* NamespaceKeyword */:
+                    case 129:
+                    case 130:
                         return nextTokenIsIdentifierOrStringLiteralOnSameLine();
-                    case 117 /* AbstractKeyword */:
-                    case 120 /* AsyncKeyword */:
-                    case 124 /* DeclareKeyword */:
-                    case 112 /* PrivateKeyword */:
-                    case 113 /* ProtectedKeyword */:
-                    case 114 /* PublicKeyword */:
-                    case 132 /* ReadonlyKeyword */:
+                    case 117:
+                    case 120:
+                    case 124:
+                    case 112:
+                    case 113:
+                    case 114:
+                    case 132:
                         nextToken();
-                        // ASI takes effect for this modifier.
                         if (scanner.hasPrecedingLineBreak()) {
                             return false;
                         }
                         continue;
-                    case 144 /* GlobalKeyword */:
+                    case 144:
                         nextToken();
-                        return token() === 17 /* OpenBraceToken */ || token() === 71 /* Identifier */ || token() === 84 /* ExportKeyword */;
-                    case 91 /* ImportKeyword */:
+                        return token() === 17 || token() === 71 || token() === 84;
+                    case 91:
                         nextToken();
-                        return token() === 9 /* StringLiteral */ || token() === 39 /* AsteriskToken */ ||
-                            token() === 17 /* OpenBraceToken */ || ts.tokenIsIdentifierOrKeyword(token());
-                    case 84 /* ExportKeyword */:
+                        return token() === 9 || token() === 39 ||
+                            token() === 17 || ts.tokenIsIdentifierOrKeyword(token());
+                    case 84:
                         nextToken();
-                        if (token() === 58 /* EqualsToken */ || token() === 39 /* AsteriskToken */ ||
-                            token() === 17 /* OpenBraceToken */ || token() === 79 /* DefaultKeyword */ ||
-                            token() === 118 /* AsKeyword */) {
+                        if (token() === 58 || token() === 39 ||
+                            token() === 17 || token() === 79 ||
+                            token() === 118) {
                             return true;
                         }
                         continue;
-                    case 115 /* StaticKeyword */:
+                    case 115:
                         nextToken();
                         continue;
                     default:
@@ -19558,52 +15610,47 @@ var ts;
         }
         function isStartOfStatement() {
             switch (token()) {
-                case 57 /* AtToken */:
-                case 25 /* SemicolonToken */:
-                case 17 /* OpenBraceToken */:
-                case 104 /* VarKeyword */:
-                case 110 /* LetKeyword */:
-                case 89 /* FunctionKeyword */:
-                case 75 /* ClassKeyword */:
-                case 83 /* EnumKeyword */:
-                case 90 /* IfKeyword */:
-                case 81 /* DoKeyword */:
-                case 106 /* WhileKeyword */:
-                case 88 /* ForKeyword */:
-                case 77 /* ContinueKeyword */:
-                case 72 /* BreakKeyword */:
-                case 96 /* ReturnKeyword */:
-                case 107 /* WithKeyword */:
-                case 98 /* SwitchKeyword */:
-                case 100 /* ThrowKeyword */:
-                case 102 /* TryKeyword */:
-                case 78 /* DebuggerKeyword */:
-                // 'catch' and 'finally' do not actually indicate that the code is part of a statement,
-                // however, we say they are here so that we may gracefully parse them and error later.
-                case 74 /* CatchKeyword */:
-                case 87 /* FinallyKeyword */:
+                case 57:
+                case 25:
+                case 17:
+                case 104:
+                case 110:
+                case 89:
+                case 75:
+                case 83:
+                case 90:
+                case 81:
+                case 106:
+                case 88:
+                case 77:
+                case 72:
+                case 96:
+                case 107:
+                case 98:
+                case 100:
+                case 102:
+                case 78:
+                case 74:
+                case 87:
                     return true;
-                case 91 /* ImportKeyword */:
+                case 91:
                     return isStartOfDeclaration() || lookAhead(nextTokenIsOpenParenOrLessThanOrDot);
-                case 76 /* ConstKeyword */:
-                case 84 /* ExportKeyword */:
+                case 76:
+                case 84:
                     return isStartOfDeclaration();
-                case 120 /* AsyncKeyword */:
-                case 124 /* DeclareKeyword */:
-                case 109 /* InterfaceKeyword */:
-                case 129 /* ModuleKeyword */:
-                case 130 /* NamespaceKeyword */:
-                case 139 /* TypeKeyword */:
-                case 144 /* GlobalKeyword */:
-                    // When these don't start a declaration, they're an identifier in an expression statement
+                case 120:
+                case 124:
+                case 109:
+                case 129:
+                case 130:
+                case 139:
+                case 144:
                     return true;
-                case 114 /* PublicKeyword */:
-                case 112 /* PrivateKeyword */:
-                case 113 /* ProtectedKeyword */:
-                case 115 /* StaticKeyword */:
-                case 132 /* ReadonlyKeyword */:
-                    // When these don't start a declaration, they may be the start of a class member if an identifier
-                    // immediately follows. Otherwise they're an identifier in an expression statement.
+                case 114:
+                case 112:
+                case 113:
+                case 115:
+                case 132:
                     return isStartOfDeclaration() || !lookAhead(nextTokenIsIdentifierOrKeywordOnSameLine);
                 default:
                     return isStartOfExpression();
@@ -19611,76 +15658,73 @@ var ts;
         }
         function nextTokenIsIdentifierOrStartOfDestructuring() {
             nextToken();
-            return isIdentifier() || token() === 17 /* OpenBraceToken */ || token() === 21 /* OpenBracketToken */;
+            return isIdentifier() || token() === 17 || token() === 21;
         }
         function isLetDeclaration() {
-            // In ES6 'let' always starts a lexical declaration if followed by an identifier or {
-            // or [.
             return lookAhead(nextTokenIsIdentifierOrStartOfDestructuring);
         }
         function parseStatement() {
             switch (token()) {
-                case 25 /* SemicolonToken */:
+                case 25:
                     return parseEmptyStatement();
-                case 17 /* OpenBraceToken */:
-                    return parseBlock(/*ignoreMissingOpenBrace*/ false);
-                case 104 /* VarKeyword */:
-                    return parseVariableStatement(createNodeWithJSDoc(232 /* VariableDeclaration */));
-                case 110 /* LetKeyword */:
+                case 17:
+                    return parseBlock(false);
+                case 104:
+                    return parseVariableStatement(createNodeWithJSDoc(232));
+                case 110:
                     if (isLetDeclaration()) {
-                        return parseVariableStatement(createNodeWithJSDoc(232 /* VariableDeclaration */));
+                        return parseVariableStatement(createNodeWithJSDoc(232));
                     }
                     break;
-                case 89 /* FunctionKeyword */:
-                    return parseFunctionDeclaration(createNodeWithJSDoc(234 /* FunctionDeclaration */));
-                case 75 /* ClassKeyword */:
-                    return parseClassDeclaration(createNodeWithJSDoc(235 /* ClassDeclaration */));
-                case 90 /* IfKeyword */:
+                case 89:
+                    return parseFunctionDeclaration(createNodeWithJSDoc(234));
+                case 75:
+                    return parseClassDeclaration(createNodeWithJSDoc(235));
+                case 90:
                     return parseIfStatement();
-                case 81 /* DoKeyword */:
+                case 81:
                     return parseDoStatement();
-                case 106 /* WhileKeyword */:
+                case 106:
                     return parseWhileStatement();
-                case 88 /* ForKeyword */:
+                case 88:
                     return parseForOrForInOrForOfStatement();
-                case 77 /* ContinueKeyword */:
-                    return parseBreakOrContinueStatement(223 /* ContinueStatement */);
-                case 72 /* BreakKeyword */:
-                    return parseBreakOrContinueStatement(224 /* BreakStatement */);
-                case 96 /* ReturnKeyword */:
+                case 77:
+                    return parseBreakOrContinueStatement(223);
+                case 72:
+                    return parseBreakOrContinueStatement(224);
+                case 96:
                     return parseReturnStatement();
-                case 107 /* WithKeyword */:
+                case 107:
                     return parseWithStatement();
-                case 98 /* SwitchKeyword */:
+                case 98:
                     return parseSwitchStatement();
-                case 100 /* ThrowKeyword */:
+                case 100:
                     return parseThrowStatement();
-                case 102 /* TryKeyword */:
-                // Include 'catch' and 'finally' for error recovery.
-                case 74 /* CatchKeyword */:
-                case 87 /* FinallyKeyword */:
+                case 102:
+                case 74:
+                case 87:
                     return parseTryStatement();
-                case 78 /* DebuggerKeyword */:
+                case 78:
                     return parseDebuggerStatement();
-                case 57 /* AtToken */:
+                case 57:
                     return parseDeclaration();
-                case 120 /* AsyncKeyword */:
-                case 109 /* InterfaceKeyword */:
-                case 139 /* TypeKeyword */:
-                case 129 /* ModuleKeyword */:
-                case 130 /* NamespaceKeyword */:
-                case 124 /* DeclareKeyword */:
-                case 76 /* ConstKeyword */:
-                case 83 /* EnumKeyword */:
-                case 84 /* ExportKeyword */:
-                case 91 /* ImportKeyword */:
-                case 112 /* PrivateKeyword */:
-                case 113 /* ProtectedKeyword */:
-                case 114 /* PublicKeyword */:
-                case 117 /* AbstractKeyword */:
-                case 115 /* StaticKeyword */:
-                case 132 /* ReadonlyKeyword */:
-                case 144 /* GlobalKeyword */:
+                case 120:
+                case 109:
+                case 139:
+                case 129:
+                case 130:
+                case 124:
+                case 76:
+                case 83:
+                case 84:
+                case 91:
+                case 112:
+                case 113:
+                case 114:
+                case 117:
+                case 115:
+                case 132:
+                case 144:
                     if (isStartOfDeclaration()) {
                         return parseDeclaration();
                     }
@@ -19689,18 +15733,18 @@ var ts;
             return parseExpressionOrLabeledStatement();
         }
         function isDeclareModifier(modifier) {
-            return modifier.kind === 124 /* DeclareKeyword */;
+            return modifier.kind === 124;
         }
         function parseDeclaration() {
-            var node = createNodeWithJSDoc(0 /* Unknown */);
+            var node = createNodeWithJSDoc(0);
             node.decorators = parseDecorators();
             node.modifiers = parseModifiers();
             if (ts.some(node.modifiers, isDeclareModifier)) {
                 for (var _i = 0, _a = node.modifiers; _i < _a.length; _i++) {
                     var m = _a[_i];
-                    m.flags |= 4194304 /* Ambient */;
+                    m.flags |= 4194304;
                 }
-                return doInsideOfContext(4194304 /* Ambient */, function () { return parseDeclarationWorker(node); });
+                return doInsideOfContext(4194304, function () { return parseDeclarationWorker(node); });
             }
             else {
                 return parseDeclarationWorker(node);
@@ -19708,82 +15752,79 @@ var ts;
         }
         function parseDeclarationWorker(node) {
             switch (token()) {
-                case 104 /* VarKeyword */:
-                case 110 /* LetKeyword */:
-                case 76 /* ConstKeyword */:
+                case 104:
+                case 110:
+                case 76:
                     return parseVariableStatement(node);
-                case 89 /* FunctionKeyword */:
+                case 89:
                     return parseFunctionDeclaration(node);
-                case 75 /* ClassKeyword */:
+                case 75:
                     return parseClassDeclaration(node);
-                case 109 /* InterfaceKeyword */:
+                case 109:
                     return parseInterfaceDeclaration(node);
-                case 139 /* TypeKeyword */:
+                case 139:
                     return parseTypeAliasDeclaration(node);
-                case 83 /* EnumKeyword */:
+                case 83:
                     return parseEnumDeclaration(node);
-                case 144 /* GlobalKeyword */:
-                case 129 /* ModuleKeyword */:
-                case 130 /* NamespaceKeyword */:
+                case 144:
+                case 129:
+                case 130:
                     return parseModuleDeclaration(node);
-                case 91 /* ImportKeyword */:
+                case 91:
                     return parseImportDeclarationOrImportEqualsDeclaration(node);
-                case 84 /* ExportKeyword */:
+                case 84:
                     nextToken();
                     switch (token()) {
-                        case 79 /* DefaultKeyword */:
-                        case 58 /* EqualsToken */:
+                        case 79:
+                        case 58:
                             return parseExportAssignment(node);
-                        case 118 /* AsKeyword */:
+                        case 118:
                             return parseNamespaceExportDeclaration(node);
                         default:
                             return parseExportDeclaration(node);
                     }
                 default:
                     if (node.decorators || node.modifiers) {
-                        // We reached this point because we encountered decorators and/or modifiers and assumed a declaration
-                        // would follow. For recovery and error reporting purposes, return an incomplete declaration.
-                        var missing = createMissingNode(253 /* MissingDeclaration */, /*reportAtCurrentPosition*/ true, ts.Diagnostics.Declaration_expected);
+                        var missing = createMissingNode(253, true, ts.Diagnostics.Declaration_expected);
                         missing.pos = node.pos;
                         missing.decorators = node.decorators;
                         missing.modifiers = node.modifiers;
                         return finishNode(missing);
                     }
-                    return undefined; // TODO: GH#18217
+                    return undefined;
             }
         }
         function nextTokenIsIdentifierOrStringLiteralOnSameLine() {
             nextToken();
-            return !scanner.hasPrecedingLineBreak() && (isIdentifier() || token() === 9 /* StringLiteral */);
+            return !scanner.hasPrecedingLineBreak() && (isIdentifier() || token() === 9);
         }
         function parseFunctionBlockOrSemicolon(flags, diagnosticMessage) {
-            if (token() !== 17 /* OpenBraceToken */ && canParseSemicolon()) {
+            if (token() !== 17 && canParseSemicolon()) {
                 parseSemicolon();
                 return;
             }
             return parseFunctionBlock(flags, diagnosticMessage);
         }
-        // DECLARATIONS
         function parseArrayBindingElement() {
-            if (token() === 26 /* CommaToken */) {
-                return createNode(206 /* OmittedExpression */);
+            if (token() === 26) {
+                return createNode(206);
             }
-            var node = createNode(182 /* BindingElement */);
-            node.dotDotDotToken = parseOptionalToken(24 /* DotDotDotToken */);
+            var node = createNode(182);
+            node.dotDotDotToken = parseOptionalToken(24);
             node.name = parseIdentifierOrPattern();
             node.initializer = parseInitializer();
             return finishNode(node);
         }
         function parseObjectBindingElement() {
-            var node = createNode(182 /* BindingElement */);
-            node.dotDotDotToken = parseOptionalToken(24 /* DotDotDotToken */);
+            var node = createNode(182);
+            node.dotDotDotToken = parseOptionalToken(24);
             var tokenIsIdentifier = isIdentifier();
             var propertyName = parsePropertyName();
-            if (tokenIsIdentifier && token() !== 56 /* ColonToken */) {
+            if (tokenIsIdentifier && token() !== 56) {
                 node.name = propertyName;
             }
             else {
-                parseExpected(56 /* ColonToken */);
+                parseExpected(56);
                 node.propertyName = propertyName;
                 node.name = parseIdentifierOrPattern();
             }
@@ -19791,39 +15832,39 @@ var ts;
             return finishNode(node);
         }
         function parseObjectBindingPattern() {
-            var node = createNode(180 /* ObjectBindingPattern */);
-            parseExpected(17 /* OpenBraceToken */);
-            node.elements = parseDelimitedList(9 /* ObjectBindingElements */, parseObjectBindingElement);
-            parseExpected(18 /* CloseBraceToken */);
+            var node = createNode(180);
+            parseExpected(17);
+            node.elements = parseDelimitedList(9, parseObjectBindingElement);
+            parseExpected(18);
             return finishNode(node);
         }
         function parseArrayBindingPattern() {
-            var node = createNode(181 /* ArrayBindingPattern */);
-            parseExpected(21 /* OpenBracketToken */);
-            node.elements = parseDelimitedList(10 /* ArrayBindingElements */, parseArrayBindingElement);
-            parseExpected(22 /* CloseBracketToken */);
+            var node = createNode(181);
+            parseExpected(21);
+            node.elements = parseDelimitedList(10, parseArrayBindingElement);
+            parseExpected(22);
             return finishNode(node);
         }
         function isIdentifierOrPattern() {
-            return token() === 17 /* OpenBraceToken */ || token() === 21 /* OpenBracketToken */ || isIdentifier();
+            return token() === 17 || token() === 21 || isIdentifier();
         }
         function parseIdentifierOrPattern() {
-            if (token() === 21 /* OpenBracketToken */) {
+            if (token() === 21) {
                 return parseArrayBindingPattern();
             }
-            if (token() === 17 /* OpenBraceToken */) {
+            if (token() === 17) {
                 return parseObjectBindingPattern();
             }
             return parseIdentifier();
         }
         function parseVariableDeclarationAllowExclamation() {
-            return parseVariableDeclaration(/*allowExclamation*/ true);
+            return parseVariableDeclaration(true);
         }
         function parseVariableDeclaration(allowExclamation) {
-            var node = createNode(232 /* VariableDeclaration */);
+            var node = createNode(232);
             node.name = parseIdentifierOrPattern();
-            if (allowExclamation && node.name.kind === 71 /* Identifier */ &&
-                token() === 51 /* ExclamationToken */ && !scanner.hasPrecedingLineBreak()) {
+            if (allowExclamation && node.name.kind === 71 &&
+                token() === 51 && !scanner.hasPrecedingLineBreak()) {
                 node.exclamationToken = parseTokenNode();
             }
             node.type = parseTypeAnnotation();
@@ -19833,104 +15874,84 @@ var ts;
             return finishNode(node);
         }
         function parseVariableDeclarationList(inForStatementInitializer) {
-            var node = createNode(233 /* VariableDeclarationList */);
+            var node = createNode(233);
             switch (token()) {
-                case 104 /* VarKeyword */:
+                case 104:
                     break;
-                case 110 /* LetKeyword */:
-                    node.flags |= 1 /* Let */;
+                case 110:
+                    node.flags |= 1;
                     break;
-                case 76 /* ConstKeyword */:
-                    node.flags |= 2 /* Const */;
+                case 76:
+                    node.flags |= 2;
                     break;
                 default:
                     ts.Debug.fail();
             }
             nextToken();
-            // The user may have written the following:
-            //
-            //    for (let of X) { }
-            //
-            // In this case, we want to parse an empty declaration list, and then parse 'of'
-            // as a keyword. The reason this is not automatic is that 'of' is a valid identifier.
-            // So we need to look ahead to determine if 'of' should be treated as a keyword in
-            // this context.
-            // The checker will then give an error that there is an empty declaration list.
-            if (token() === 145 /* OfKeyword */ && lookAhead(canFollowContextualOfKeyword)) {
+            if (token() === 145 && lookAhead(canFollowContextualOfKeyword)) {
                 node.declarations = createMissingList();
             }
             else {
                 var savedDisallowIn = inDisallowInContext();
                 setDisallowInContext(inForStatementInitializer);
-                node.declarations = parseDelimitedList(8 /* VariableDeclarations */, inForStatementInitializer ? parseVariableDeclaration : parseVariableDeclarationAllowExclamation);
+                node.declarations = parseDelimitedList(8, inForStatementInitializer ? parseVariableDeclaration : parseVariableDeclarationAllowExclamation);
                 setDisallowInContext(savedDisallowIn);
             }
             return finishNode(node);
         }
         function canFollowContextualOfKeyword() {
-            return nextTokenIsIdentifier() && nextToken() === 20 /* CloseParenToken */;
+            return nextTokenIsIdentifier() && nextToken() === 20;
         }
         function parseVariableStatement(node) {
-            node.kind = 214 /* VariableStatement */;
-            node.declarationList = parseVariableDeclarationList(/*inForStatementInitializer*/ false);
+            node.kind = 214;
+            node.declarationList = parseVariableDeclarationList(false);
             parseSemicolon();
             return finishNode(node);
         }
         function parseFunctionDeclaration(node) {
-            node.kind = 234 /* FunctionDeclaration */;
-            parseExpected(89 /* FunctionKeyword */);
-            node.asteriskToken = parseOptionalToken(39 /* AsteriskToken */);
-            node.name = ts.hasModifier(node, 512 /* Default */) ? parseOptionalIdentifier() : parseIdentifier();
-            var isGenerator = node.asteriskToken ? 1 /* Yield */ : 0 /* None */;
-            var isAsync = ts.hasModifier(node, 256 /* Async */) ? 2 /* Await */ : 0 /* None */;
-            fillSignature(56 /* ColonToken */, isGenerator | isAsync, node);
+            node.kind = 234;
+            parseExpected(89);
+            node.asteriskToken = parseOptionalToken(39);
+            node.name = ts.hasModifier(node, 512) ? parseOptionalIdentifier() : parseIdentifier();
+            var isGenerator = node.asteriskToken ? 1 : 0;
+            var isAsync = ts.hasModifier(node, 256) ? 2 : 0;
+            fillSignature(56, isGenerator | isAsync, node);
             node.body = parseFunctionBlockOrSemicolon(isGenerator | isAsync, ts.Diagnostics.or_expected);
             return finishNode(node);
         }
         function parseConstructorDeclaration(node) {
-            node.kind = 155 /* Constructor */;
-            parseExpected(123 /* ConstructorKeyword */);
-            fillSignature(56 /* ColonToken */, 0 /* None */, node);
-            node.body = parseFunctionBlockOrSemicolon(0 /* None */, ts.Diagnostics.or_expected);
+            node.kind = 155;
+            parseExpected(123);
+            fillSignature(56, 0, node);
+            node.body = parseFunctionBlockOrSemicolon(0, ts.Diagnostics.or_expected);
             return finishNode(node);
         }
         function parseMethodDeclaration(node, asteriskToken, diagnosticMessage) {
-            node.kind = 154 /* MethodDeclaration */;
+            node.kind = 154;
             node.asteriskToken = asteriskToken;
-            var isGenerator = asteriskToken ? 1 /* Yield */ : 0 /* None */;
-            var isAsync = ts.hasModifier(node, 256 /* Async */) ? 2 /* Await */ : 0 /* None */;
-            fillSignature(56 /* ColonToken */, isGenerator | isAsync, node);
+            var isGenerator = asteriskToken ? 1 : 0;
+            var isAsync = ts.hasModifier(node, 256) ? 2 : 0;
+            fillSignature(56, isGenerator | isAsync, node);
             node.body = parseFunctionBlockOrSemicolon(isGenerator | isAsync, diagnosticMessage);
             return finishNode(node);
         }
         function parsePropertyDeclaration(node) {
-            node.kind = 152 /* PropertyDeclaration */;
-            if (!node.questionToken && token() === 51 /* ExclamationToken */ && !scanner.hasPrecedingLineBreak()) {
+            node.kind = 152;
+            if (!node.questionToken && token() === 51 && !scanner.hasPrecedingLineBreak()) {
                 node.exclamationToken = parseTokenNode();
             }
             node.type = parseTypeAnnotation();
-            // For instance properties specifically, since they are evaluated inside the constructor,
-            // we do *not * want to parse yield expressions, so we specifically turn the yield context
-            // off. The grammar would look something like this:
-            //
-            //    MemberVariableDeclaration[Yield]:
-            //        AccessibilityModifier_opt PropertyName TypeAnnotation_opt Initializer_opt[In];
-            //        AccessibilityModifier_opt static_opt PropertyName TypeAnnotation_opt Initializer_opt[In, ?Yield];
-            //
-            // The checker may still error in the static case to explicitly disallow the yield expression.
-            node.initializer = ts.hasModifier(node, 32 /* Static */)
+            node.initializer = ts.hasModifier(node, 32)
                 ? allowInAnd(parseInitializer)
-                : doOutsideOfContext(4096 /* YieldContext */ | 2048 /* DisallowInContext */, parseInitializer);
+                : doOutsideOfContext(4096 | 2048, parseInitializer);
             parseSemicolon();
             return finishNode(node);
         }
         function parsePropertyOrMethodDeclaration(node) {
-            var asteriskToken = parseOptionalToken(39 /* AsteriskToken */);
+            var asteriskToken = parseOptionalToken(39);
             node.name = parsePropertyName();
-            // Note: this is not legal as per the grammar.  But we allow it in the parser and
-            // report an error in the grammar checker.
-            node.questionToken = parseOptionalToken(55 /* QuestionToken */);
-            if (asteriskToken || token() === 19 /* OpenParenToken */ || token() === 27 /* LessThanToken */) {
+            node.questionToken = parseOptionalToken(55);
+            if (asteriskToken || token() === 19 || token() === 27) {
                 return parseMethodDeclaration(node, asteriskToken, ts.Diagnostics.or_expected);
             }
             return parsePropertyDeclaration(node);
@@ -19938,64 +15959,45 @@ var ts;
         function parseAccessorDeclaration(node, kind) {
             node.kind = kind;
             node.name = parsePropertyName();
-            fillSignature(56 /* ColonToken */, 0 /* None */, node);
-            node.body = parseFunctionBlockOrSemicolon(0 /* None */);
+            fillSignature(56, 0, node);
+            node.body = parseFunctionBlockOrSemicolon(0);
             return finishNode(node);
         }
         function isClassMemberStart() {
             var idToken;
-            if (token() === 57 /* AtToken */) {
+            if (token() === 57) {
                 return true;
             }
-            // Eat up all modifiers, but hold on to the last one in case it is actually an identifier.
             while (ts.isModifierKind(token())) {
                 idToken = token();
-                // If the idToken is a class modifier (protected, private, public, and static), it is
-                // certain that we are starting to parse class member. This allows better error recovery
-                // Example:
-                //      public foo() ...     // true
-                //      public @dec blah ... // true; we will then report an error later
-                //      export public ...    // true; we will then report an error later
                 if (ts.isClassMemberModifier(idToken)) {
                     return true;
                 }
                 nextToken();
             }
-            if (token() === 39 /* AsteriskToken */) {
+            if (token() === 39) {
                 return true;
             }
-            // Try to get the first property-like token following all modifiers.
-            // This can either be an identifier or the 'get' or 'set' keywords.
             if (isLiteralPropertyName()) {
                 idToken = token();
                 nextToken();
             }
-            // Index signatures and computed properties are class members; we can parse.
-            if (token() === 21 /* OpenBracketToken */) {
+            if (token() === 21) {
                 return true;
             }
-            // If we were able to get any potential identifier...
             if (idToken !== undefined) {
-                // If we have a non-keyword identifier, or if we have an accessor, then it's safe to parse.
-                if (!ts.isKeyword(idToken) || idToken === 136 /* SetKeyword */ || idToken === 125 /* GetKeyword */) {
+                if (!ts.isKeyword(idToken) || idToken === 136 || idToken === 125) {
                     return true;
                 }
-                // If it *is* a keyword, but not an accessor, check a little farther along
-                // to see if it should actually be parsed as a class member.
                 switch (token()) {
-                    case 19 /* OpenParenToken */: // Method declaration
-                    case 27 /* LessThanToken */: // Generic Method declaration
-                    case 51 /* ExclamationToken */: // Non-null assertion on property name
-                    case 56 /* ColonToken */: // Type Annotation for declaration
-                    case 58 /* EqualsToken */: // Initializer for declaration
-                    case 55 /* QuestionToken */: // Not valid, but permitted so that it gets caught later on.
+                    case 19:
+                    case 27:
+                    case 51:
+                    case 56:
+                    case 58:
+                    case 55:
                         return true;
                     default:
-                        // Covers
-                        //  - Semicolons     (declaration termination)
-                        //  - Closing braces (end-of-class, must be declaration)
-                        //  - End-of-files   (not valid, but permitted so that it gets caught later on)
-                        //  - Line-breaks    (enabling *automatic semicolon insertion*)
                         return canParseSemicolon();
                 }
             }
@@ -20006,32 +16008,23 @@ var ts;
             var listPos = getNodePos();
             while (true) {
                 var decoratorStart = getNodePos();
-                if (!parseOptional(57 /* AtToken */)) {
+                if (!parseOptional(57)) {
                     break;
                 }
-                var decorator = createNode(150 /* Decorator */, decoratorStart);
+                var decorator = createNode(150, decoratorStart);
                 decorator.expression = doInDecoratorContext(parseLeftHandSideExpressionOrHigher);
                 finishNode(decorator);
                 (list || (list = [])).push(decorator);
             }
             return list && createNodeArray(list, listPos);
         }
-        /*
-         * There are situations in which a modifier like 'const' will appear unexpectedly, such as on a class member.
-         * In those situations, if we are entirely sure that 'const' is not valid on its own (such as when ASI takes effect
-         * and turns it into a standalone declaration), then it is better to parse it and report an error later.
-         *
-         * In such situations, 'permitInvalidConstAsModifier' should be set to true.
-         */
         function parseModifiers(permitInvalidConstAsModifier) {
             var list;
             var listPos = getNodePos();
             while (true) {
                 var modifierStart = scanner.getStartPos();
                 var modifierKind = token();
-                if (token() === 76 /* ConstKeyword */ && permitInvalidConstAsModifier) {
-                    // We need to ensure that any subsequent modifiers appear on the same line
-                    // so that when 'const' is a standalone declaration, we don't issue an error.
+                if (token() === 76 && permitInvalidConstAsModifier) {
                     if (!tryParse(nextTokenIsOnSameLineAndCanFollowModifier)) {
                         break;
                     }
@@ -20048,7 +16041,7 @@ var ts;
         }
         function parseModifiersForArrowFunction() {
             var modifiers;
-            if (token() === 120 /* AsyncKeyword */) {
+            if (token() === 120) {
                 var modifierStart = scanner.getStartPos();
                 var modifierKind = token();
                 nextToken();
@@ -20058,60 +16051,54 @@ var ts;
             return modifiers;
         }
         function parseClassElement() {
-            if (token() === 25 /* SemicolonToken */) {
-                var result = createNode(212 /* SemicolonClassElement */);
+            if (token() === 25) {
+                var result = createNode(212);
                 nextToken();
                 return finishNode(result);
             }
-            var node = createNodeWithJSDoc(0 /* Unknown */);
+            var node = createNodeWithJSDoc(0);
             node.decorators = parseDecorators();
-            node.modifiers = parseModifiers(/*permitInvalidConstAsModifier*/ true);
-            if (parseContextualModifier(125 /* GetKeyword */)) {
-                return parseAccessorDeclaration(node, 156 /* GetAccessor */);
+            node.modifiers = parseModifiers(true);
+            if (parseContextualModifier(125)) {
+                return parseAccessorDeclaration(node, 156);
             }
-            if (parseContextualModifier(136 /* SetKeyword */)) {
-                return parseAccessorDeclaration(node, 157 /* SetAccessor */);
+            if (parseContextualModifier(136)) {
+                return parseAccessorDeclaration(node, 157);
             }
-            if (token() === 123 /* ConstructorKeyword */) {
+            if (token() === 123) {
                 return parseConstructorDeclaration(node);
             }
             if (isIndexSignature()) {
                 return parseIndexSignatureDeclaration(node);
             }
-            // It is very important that we check this *after* checking indexers because
-            // the [ token can start an index signature or a computed property name
             if (ts.tokenIsIdentifierOrKeyword(token()) ||
-                token() === 9 /* StringLiteral */ ||
-                token() === 8 /* NumericLiteral */ ||
-                token() === 39 /* AsteriskToken */ ||
-                token() === 21 /* OpenBracketToken */) {
+                token() === 9 ||
+                token() === 8 ||
+                token() === 39 ||
+                token() === 21) {
                 return parsePropertyOrMethodDeclaration(node);
             }
             if (node.decorators || node.modifiers) {
-                // treat this as a property declaration with a missing name.
-                node.name = createMissingNode(71 /* Identifier */, /*reportAtCurrentPosition*/ true, ts.Diagnostics.Declaration_expected);
+                node.name = createMissingNode(71, true, ts.Diagnostics.Declaration_expected);
                 return parsePropertyDeclaration(node);
             }
-            // 'isClassMemberStart' should have hinted not to attempt parsing.
             return ts.Debug.fail("Should not have attempted to parse class member declaration.");
         }
         function parseClassExpression() {
-            return parseClassDeclarationOrExpression(createNodeWithJSDoc(0 /* Unknown */), 205 /* ClassExpression */);
+            return parseClassDeclarationOrExpression(createNodeWithJSDoc(0), 205);
         }
         function parseClassDeclaration(node) {
-            return parseClassDeclarationOrExpression(node, 235 /* ClassDeclaration */);
+            return parseClassDeclarationOrExpression(node, 235);
         }
         function parseClassDeclarationOrExpression(node, kind) {
             node.kind = kind;
-            parseExpected(75 /* ClassKeyword */);
+            parseExpected(75);
             node.name = parseNameOfClassDeclarationOrExpression();
             node.typeParameters = parseTypeParameters();
             node.heritageClauses = parseHeritageClauses();
-            if (parseExpected(17 /* OpenBraceToken */)) {
-                // ClassTail[Yield,Await] : (Modified) See 14.5
-                //      ClassHeritage[?Yield,?Await]opt { ClassBody[?Yield,?Await]opt }
+            if (parseExpected(17)) {
                 node.members = parseClassMembers();
-                parseExpected(18 /* CloseBraceToken */);
+                parseExpected(18);
             }
             else {
                 node.members = createMissingList();
@@ -20119,55 +16106,48 @@ var ts;
             return finishNode(node);
         }
         function parseNameOfClassDeclarationOrExpression() {
-            // implements is a future reserved word so
-            // 'class implements' might mean either
-            // - class expression with omitted name, 'implements' starts heritage clause
-            // - class with name 'implements'
-            // 'isImplementsClause' helps to disambiguate between these two cases
             return isIdentifier() && !isImplementsClause()
                 ? parseIdentifier()
                 : undefined;
         }
         function isImplementsClause() {
-            return token() === 108 /* ImplementsKeyword */ && lookAhead(nextTokenIsIdentifierOrKeyword);
+            return token() === 108 && lookAhead(nextTokenIsIdentifierOrKeyword);
         }
         function parseHeritageClauses() {
-            // ClassTail[Yield,Await] : (Modified) See 14.5
-            //      ClassHeritage[?Yield,?Await]opt { ClassBody[?Yield,?Await]opt }
             if (isHeritageClause()) {
-                return parseList(21 /* HeritageClauses */, parseHeritageClause);
+                return parseList(21, parseHeritageClause);
             }
             return undefined;
         }
         function parseHeritageClause() {
             var tok = token();
-            ts.Debug.assert(tok === 85 /* ExtendsKeyword */ || tok === 108 /* ImplementsKeyword */); // isListElement() should ensure this.
-            var node = createNode(268 /* HeritageClause */);
+            ts.Debug.assert(tok === 85 || tok === 108);
+            var node = createNode(268);
             node.token = tok;
             nextToken();
-            node.types = parseDelimitedList(7 /* HeritageClauseElement */, parseExpressionWithTypeArguments);
+            node.types = parseDelimitedList(7, parseExpressionWithTypeArguments);
             return finishNode(node);
         }
         function parseExpressionWithTypeArguments() {
-            var node = createNode(207 /* ExpressionWithTypeArguments */);
+            var node = createNode(207);
             node.expression = parseLeftHandSideExpressionOrHigher();
             node.typeArguments = tryParseTypeArguments();
             return finishNode(node);
         }
         function tryParseTypeArguments() {
-            return token() === 27 /* LessThanToken */
-                ? parseBracketedList(19 /* TypeArguments */, parseType, 27 /* LessThanToken */, 29 /* GreaterThanToken */)
+            return token() === 27
+                ? parseBracketedList(19, parseType, 27, 29)
                 : undefined;
         }
         function isHeritageClause() {
-            return token() === 85 /* ExtendsKeyword */ || token() === 108 /* ImplementsKeyword */;
+            return token() === 85 || token() === 108;
         }
         function parseClassMembers() {
-            return parseList(5 /* ClassMembers */, parseClassElement);
+            return parseList(5, parseClassElement);
         }
         function parseInterfaceDeclaration(node) {
-            node.kind = 236 /* InterfaceDeclaration */;
-            parseExpected(109 /* InterfaceKeyword */);
+            node.kind = 236;
+            parseExpected(109);
             node.name = parseIdentifier();
             node.typeParameters = parseTypeParameters();
             node.heritageClauses = parseHeritageClauses();
@@ -20175,32 +16155,28 @@ var ts;
             return finishNode(node);
         }
         function parseTypeAliasDeclaration(node) {
-            node.kind = 237 /* TypeAliasDeclaration */;
-            parseExpected(139 /* TypeKeyword */);
+            node.kind = 237;
+            parseExpected(139);
             node.name = parseIdentifier();
             node.typeParameters = parseTypeParameters();
-            parseExpected(58 /* EqualsToken */);
+            parseExpected(58);
             node.type = parseType();
             parseSemicolon();
             return finishNode(node);
         }
-        // In an ambient declaration, the grammar only allows integer literals as initializers.
-        // In a non-ambient declaration, the grammar allows uninitialized members only in a
-        // ConstantEnumMemberSection, which starts at the beginning of an enum declaration
-        // or any time an integer literal initializer is encountered.
         function parseEnumMember() {
-            var node = createNodeWithJSDoc(273 /* EnumMember */);
+            var node = createNodeWithJSDoc(273);
             node.name = parsePropertyName();
             node.initializer = allowInAnd(parseInitializer);
             return finishNode(node);
         }
         function parseEnumDeclaration(node) {
-            node.kind = 238 /* EnumDeclaration */;
-            parseExpected(83 /* EnumKeyword */);
+            node.kind = 238;
+            parseExpected(83);
             node.name = parseIdentifier();
-            if (parseExpected(17 /* OpenBraceToken */)) {
-                node.members = parseDelimitedList(6 /* EnumMembers */, parseEnumMember);
-                parseExpected(18 /* CloseBraceToken */);
+            if (parseExpected(17)) {
+                node.members = parseDelimitedList(6, parseEnumMember);
+                parseExpected(18);
             }
             else {
                 node.members = createMissingList();
@@ -20208,10 +16184,10 @@ var ts;
             return finishNode(node);
         }
         function parseModuleBlock() {
-            var node = createNode(240 /* ModuleBlock */);
-            if (parseExpected(17 /* OpenBraceToken */)) {
-                node.statements = parseList(1 /* BlockStatements */, parseStatement);
-                parseExpected(18 /* CloseBraceToken */);
+            var node = createNode(240);
+            if (parseExpected(17)) {
+                node.statements = parseList(1, parseStatement);
+                parseExpected(18);
             }
             else {
                 node.statements = createMissingList();
@@ -20219,29 +16195,26 @@ var ts;
             return finishNode(node);
         }
         function parseModuleOrNamespaceDeclaration(node, flags) {
-            node.kind = 239 /* ModuleDeclaration */;
-            // If we are parsing a dotted namespace name, we want to
-            // propagate the 'Namespace' flag across the names if set.
-            var namespaceFlag = flags & 16 /* Namespace */;
+            node.kind = 239;
+            var namespaceFlag = flags & 16;
             node.flags |= flags;
             node.name = parseIdentifier();
-            node.body = parseOptional(23 /* DotToken */)
-                ? parseModuleOrNamespaceDeclaration(createNode(0 /* Unknown */), 4 /* NestedNamespace */ | namespaceFlag)
+            node.body = parseOptional(23)
+                ? parseModuleOrNamespaceDeclaration(createNode(0), 4 | namespaceFlag)
                 : parseModuleBlock();
             return finishNode(node);
         }
         function parseAmbientExternalModuleDeclaration(node) {
-            node.kind = 239 /* ModuleDeclaration */;
-            if (token() === 144 /* GlobalKeyword */) {
-                // parse 'global' as name of global scope augmentation
+            node.kind = 239;
+            if (token() === 144) {
                 node.name = parseIdentifier();
-                node.flags |= 512 /* GlobalAugmentation */;
+                node.flags |= 512;
             }
             else {
                 node.name = parseLiteralNode();
                 node.name.text = internIdentifier(node.name.text);
             }
-            if (token() === 17 /* OpenBraceToken */) {
+            if (token() === 17) {
                 node.body = parseModuleBlock();
             }
             else {
@@ -20251,161 +16224,128 @@ var ts;
         }
         function parseModuleDeclaration(node) {
             var flags = 0;
-            if (token() === 144 /* GlobalKeyword */) {
-                // global augmentation
+            if (token() === 144) {
                 return parseAmbientExternalModuleDeclaration(node);
             }
-            else if (parseOptional(130 /* NamespaceKeyword */)) {
-                flags |= 16 /* Namespace */;
+            else if (parseOptional(130)) {
+                flags |= 16;
             }
             else {
-                parseExpected(129 /* ModuleKeyword */);
-                if (token() === 9 /* StringLiteral */) {
+                parseExpected(129);
+                if (token() === 9) {
                     return parseAmbientExternalModuleDeclaration(node);
                 }
             }
             return parseModuleOrNamespaceDeclaration(node, flags);
         }
         function isExternalModuleReference() {
-            return token() === 133 /* RequireKeyword */ &&
+            return token() === 133 &&
                 lookAhead(nextTokenIsOpenParen);
         }
         function nextTokenIsOpenParen() {
-            return nextToken() === 19 /* OpenParenToken */;
+            return nextToken() === 19;
         }
         function nextTokenIsSlash() {
-            return nextToken() === 41 /* SlashToken */;
+            return nextToken() === 41;
         }
         function parseNamespaceExportDeclaration(node) {
-            node.kind = 242 /* NamespaceExportDeclaration */;
-            parseExpected(118 /* AsKeyword */);
-            parseExpected(130 /* NamespaceKeyword */);
+            node.kind = 242;
+            parseExpected(118);
+            parseExpected(130);
             node.name = parseIdentifier();
             parseSemicolon();
             return finishNode(node);
         }
         function parseImportDeclarationOrImportEqualsDeclaration(node) {
-            parseExpected(91 /* ImportKeyword */);
+            parseExpected(91);
             var afterImportPos = scanner.getStartPos();
             var identifier;
             if (isIdentifier()) {
                 identifier = parseIdentifier();
-                if (token() !== 26 /* CommaToken */ && token() !== 143 /* FromKeyword */) {
+                if (token() !== 26 && token() !== 143) {
                     return parseImportEqualsDeclaration(node, identifier);
                 }
             }
-            // Import statement
-            node.kind = 244 /* ImportDeclaration */;
-            // ImportDeclaration:
-            //  import ImportClause from ModuleSpecifier ;
-            //  import ModuleSpecifier;
-            if (identifier || // import id
-                token() === 39 /* AsteriskToken */ || // import *
-                token() === 17 /* OpenBraceToken */) { // import {
+            node.kind = 244;
+            if (identifier ||
+                token() === 39 ||
+                token() === 17) {
                 node.importClause = parseImportClause(identifier, afterImportPos);
-                parseExpected(143 /* FromKeyword */);
+                parseExpected(143);
             }
             node.moduleSpecifier = parseModuleSpecifier();
             parseSemicolon();
             return finishNode(node);
         }
         function parseImportEqualsDeclaration(node, identifier) {
-            node.kind = 243 /* ImportEqualsDeclaration */;
+            node.kind = 243;
             node.name = identifier;
-            parseExpected(58 /* EqualsToken */);
+            parseExpected(58);
             node.moduleReference = parseModuleReference();
             parseSemicolon();
             return finishNode(node);
         }
         function parseImportClause(identifier, fullStart) {
-            // ImportClause:
-            //  ImportedDefaultBinding
-            //  NameSpaceImport
-            //  NamedImports
-            //  ImportedDefaultBinding, NameSpaceImport
-            //  ImportedDefaultBinding, NamedImports
-            var importClause = createNode(245 /* ImportClause */, fullStart);
+            var importClause = createNode(245, fullStart);
             if (identifier) {
-                // ImportedDefaultBinding:
-                //  ImportedBinding
                 importClause.name = identifier;
             }
-            // If there was no default import or if there is comma token after default import
-            // parse namespace or named imports
             if (!importClause.name ||
-                parseOptional(26 /* CommaToken */)) {
-                importClause.namedBindings = token() === 39 /* AsteriskToken */ ? parseNamespaceImport() : parseNamedImportsOrExports(247 /* NamedImports */);
+                parseOptional(26)) {
+                importClause.namedBindings = token() === 39 ? parseNamespaceImport() : parseNamedImportsOrExports(247);
             }
             return finishNode(importClause);
         }
         function parseModuleReference() {
             return isExternalModuleReference()
                 ? parseExternalModuleReference()
-                : parseEntityName(/*allowReservedWords*/ false);
+                : parseEntityName(false);
         }
         function parseExternalModuleReference() {
-            var node = createNode(254 /* ExternalModuleReference */);
-            parseExpected(133 /* RequireKeyword */);
-            parseExpected(19 /* OpenParenToken */);
+            var node = createNode(254);
+            parseExpected(133);
+            parseExpected(19);
             node.expression = parseModuleSpecifier();
-            parseExpected(20 /* CloseParenToken */);
+            parseExpected(20);
             return finishNode(node);
         }
         function parseModuleSpecifier() {
-            if (token() === 9 /* StringLiteral */) {
+            if (token() === 9) {
                 var result = parseLiteralNode();
                 result.text = internIdentifier(result.text);
                 return result;
             }
             else {
-                // We allow arbitrary expressions here, even though the grammar only allows string
-                // literals.  We check to ensure that it is only a string literal later in the grammar
-                // check pass.
                 return parseExpression();
             }
         }
         function parseNamespaceImport() {
-            // NameSpaceImport:
-            //  * as ImportedBinding
-            var namespaceImport = createNode(246 /* NamespaceImport */);
-            parseExpected(39 /* AsteriskToken */);
-            parseExpected(118 /* AsKeyword */);
+            var namespaceImport = createNode(246);
+            parseExpected(39);
+            parseExpected(118);
             namespaceImport.name = parseIdentifier();
             return finishNode(namespaceImport);
         }
         function parseNamedImportsOrExports(kind) {
             var node = createNode(kind);
-            // NamedImports:
-            //  { }
-            //  { ImportsList }
-            //  { ImportsList, }
-            // ImportsList:
-            //  ImportSpecifier
-            //  ImportsList, ImportSpecifier
-            node.elements = parseBracketedList(22 /* ImportOrExportSpecifiers */, kind === 247 /* NamedImports */ ? parseImportSpecifier : parseExportSpecifier, 17 /* OpenBraceToken */, 18 /* CloseBraceToken */);
+            node.elements = parseBracketedList(22, kind === 247 ? parseImportSpecifier : parseExportSpecifier, 17, 18);
             return finishNode(node);
         }
         function parseExportSpecifier() {
-            return parseImportOrExportSpecifier(252 /* ExportSpecifier */);
+            return parseImportOrExportSpecifier(252);
         }
         function parseImportSpecifier() {
-            return parseImportOrExportSpecifier(248 /* ImportSpecifier */);
+            return parseImportOrExportSpecifier(248);
         }
         function parseImportOrExportSpecifier(kind) {
             var node = createNode(kind);
-            // ImportSpecifier:
-            //   BindingIdentifier
-            //   IdentifierName as BindingIdentifier
-            // ExportSpecifier:
-            //   IdentifierName
-            //   IdentifierName as IdentifierName
             var checkIdentifierIsKeyword = ts.isKeyword(token()) && !isIdentifier();
             var checkIdentifierStart = scanner.getTokenPos();
             var checkIdentifierEnd = scanner.getTextPos();
             var identifierName = parseIdentifierName();
-            if (token() === 118 /* AsKeyword */) {
+            if (token() === 118) {
                 node.propertyName = identifierName;
-                parseExpected(118 /* AsKeyword */);
+                parseExpected(118);
                 checkIdentifierIsKeyword = ts.isKeyword(token()) && !isIdentifier();
                 checkIdentifierStart = scanner.getTokenPos();
                 checkIdentifierEnd = scanner.getTextPos();
@@ -20414,24 +16354,21 @@ var ts;
             else {
                 node.name = identifierName;
             }
-            if (kind === 248 /* ImportSpecifier */ && checkIdentifierIsKeyword) {
+            if (kind === 248 && checkIdentifierIsKeyword) {
                 parseErrorAt(checkIdentifierStart, checkIdentifierEnd, ts.Diagnostics.Identifier_expected);
             }
             return finishNode(node);
         }
         function parseExportDeclaration(node) {
-            node.kind = 250 /* ExportDeclaration */;
-            if (parseOptional(39 /* AsteriskToken */)) {
-                parseExpected(143 /* FromKeyword */);
+            node.kind = 250;
+            if (parseOptional(39)) {
+                parseExpected(143);
                 node.moduleSpecifier = parseModuleSpecifier();
             }
             else {
-                node.exportClause = parseNamedImportsOrExports(251 /* NamedExports */);
-                // It is not uncommon to accidentally omit the 'from' keyword. Additionally, in editing scenarios,
-                // the 'from' keyword can be parsed as a named export when the export clause is unterminated (i.e. `export { from "moduleName";`)
-                // If we don't have a 'from' keyword, see if we have a string literal such that ASI won't take effect.
-                if (token() === 143 /* FromKeyword */ || (token() === 9 /* StringLiteral */ && !scanner.hasPrecedingLineBreak())) {
-                    parseExpected(143 /* FromKeyword */);
+                node.exportClause = parseNamedImportsOrExports(251);
+                if (token() === 143 || (token() === 9 && !scanner.hasPrecedingLineBreak())) {
+                    parseExpected(143);
                     node.moduleSpecifier = parseModuleSpecifier();
                 }
             }
@@ -20439,35 +16376,33 @@ var ts;
             return finishNode(node);
         }
         function parseExportAssignment(node) {
-            node.kind = 249 /* ExportAssignment */;
-            if (parseOptional(58 /* EqualsToken */)) {
+            node.kind = 249;
+            if (parseOptional(58)) {
                 node.isExportEquals = true;
             }
             else {
-                parseExpected(79 /* DefaultKeyword */);
+                parseExpected(79);
             }
             node.expression = parseAssignmentExpressionOrHigher();
             parseSemicolon();
             return finishNode(node);
         }
         function setExternalModuleIndicator(sourceFile) {
-            // Try to use the first top-level import/export when available, then
-            // fall back to looking for an 'import.meta' somewhere in the tree if necessary.
             sourceFile.externalModuleIndicator =
                 ts.forEach(sourceFile.statements, isAnExternalModuleIndicatorNode) ||
                     getImportMetaIfNecessary(sourceFile);
         }
         function isAnExternalModuleIndicatorNode(node) {
-            return ts.hasModifier(node, 1 /* Export */)
-                || node.kind === 243 /* ImportEqualsDeclaration */ && node.moduleReference.kind === 254 /* ExternalModuleReference */
-                || node.kind === 244 /* ImportDeclaration */
-                || node.kind === 249 /* ExportAssignment */
-                || node.kind === 250 /* ExportDeclaration */
+            return ts.hasModifier(node, 1)
+                || node.kind === 243 && node.moduleReference.kind === 254
+                || node.kind === 244
+                || node.kind === 249
+                || node.kind === 250
                 ? node
                 : undefined;
         }
         function getImportMetaIfNecessary(sourceFile) {
-            return sourceFile.flags & 1048576 /* PossiblyContainsImportMeta */ ?
+            return sourceFile.flags & 1048576 ?
                 walkTreeForExternalModuleIndicators(sourceFile) :
                 undefined;
         }
@@ -20475,46 +16410,13 @@ var ts;
             return isImportMeta(node) ? node : forEachChild(node, walkTreeForExternalModuleIndicators);
         }
         function isImportMeta(node) {
-            return ts.isMetaProperty(node) && node.keywordToken === 91 /* ImportKeyword */ && node.name.escapedText === "meta";
-        }
-        var ParsingContext;
-        (function (ParsingContext) {
-            ParsingContext[ParsingContext["SourceElements"] = 0] = "SourceElements";
-            ParsingContext[ParsingContext["BlockStatements"] = 1] = "BlockStatements";
-            ParsingContext[ParsingContext["SwitchClauses"] = 2] = "SwitchClauses";
-            ParsingContext[ParsingContext["SwitchClauseStatements"] = 3] = "SwitchClauseStatements";
-            ParsingContext[ParsingContext["TypeMembers"] = 4] = "TypeMembers";
-            ParsingContext[ParsingContext["ClassMembers"] = 5] = "ClassMembers";
-            ParsingContext[ParsingContext["EnumMembers"] = 6] = "EnumMembers";
-            ParsingContext[ParsingContext["HeritageClauseElement"] = 7] = "HeritageClauseElement";
-            ParsingContext[ParsingContext["VariableDeclarations"] = 8] = "VariableDeclarations";
-            ParsingContext[ParsingContext["ObjectBindingElements"] = 9] = "ObjectBindingElements";
-            ParsingContext[ParsingContext["ArrayBindingElements"] = 10] = "ArrayBindingElements";
-            ParsingContext[ParsingContext["ArgumentExpressions"] = 11] = "ArgumentExpressions";
-            ParsingContext[ParsingContext["ObjectLiteralMembers"] = 12] = "ObjectLiteralMembers";
-            ParsingContext[ParsingContext["JsxAttributes"] = 13] = "JsxAttributes";
-            ParsingContext[ParsingContext["JsxChildren"] = 14] = "JsxChildren";
-            ParsingContext[ParsingContext["ArrayLiteralMembers"] = 15] = "ArrayLiteralMembers";
-            ParsingContext[ParsingContext["Parameters"] = 16] = "Parameters";
-            ParsingContext[ParsingContext["RestProperties"] = 17] = "RestProperties";
-            ParsingContext[ParsingContext["TypeParameters"] = 18] = "TypeParameters";
-            ParsingContext[ParsingContext["TypeArguments"] = 19] = "TypeArguments";
-            ParsingContext[ParsingContext["TupleElementTypes"] = 20] = "TupleElementTypes";
-            ParsingContext[ParsingContext["HeritageClauses"] = 21] = "HeritageClauses";
-            ParsingContext[ParsingContext["ImportOrExportSpecifiers"] = 22] = "ImportOrExportSpecifiers";
-            ParsingContext[ParsingContext["Count"] = 23] = "Count"; // Number of parsing contexts
-        })(ParsingContext || (ParsingContext = {}));
-        var Tristate;
-        (function (Tristate) {
-            Tristate[Tristate["False"] = 0] = "False";
-            Tristate[Tristate["True"] = 1] = "True";
-            Tristate[Tristate["Unknown"] = 2] = "Unknown";
-        })(Tristate || (Tristate = {}));
+            return ts.isMetaProperty(node) && node.keywordToken === 91 && node.name.escapedText === "meta";
+        }
         var JSDocParser;
         (function (JSDocParser) {
             function parseJSDocTypeExpressionForTests(content, start, length) {
-                initializeState(content, 6 /* Latest */, /*_syntaxCursor:*/ undefined, 1 /* JS */);
-                sourceFile = createSourceFile("file.js", 6 /* Latest */, 1 /* JS */, /*isDeclarationFile*/ false);
+                initializeState(content, 6, undefined, 1);
+                sourceFile = createSourceFile("file.js", 6, 1, false);
                 scanner.setText(content, start, length);
                 currentToken = scanner.scan();
                 var jsDocTypeExpression = parseJSDocTypeExpression();
@@ -20523,21 +16425,20 @@ var ts;
                 return jsDocTypeExpression ? { jsDocTypeExpression: jsDocTypeExpression, diagnostics: diagnostics } : undefined;
             }
             JSDocParser.parseJSDocTypeExpressionForTests = parseJSDocTypeExpressionForTests;
-            // Parses out a JSDoc type expression.
             function parseJSDocTypeExpression(mayOmitBraces) {
-                var result = createNode(278 /* JSDocTypeExpression */, scanner.getTokenPos());
-                var hasBrace = (mayOmitBraces ? parseOptional : parseExpected)(17 /* OpenBraceToken */);
-                result.type = doInsideOfContext(2097152 /* JSDoc */, parseJSDocType);
+                var result = createNode(278, scanner.getTokenPos());
+                var hasBrace = (mayOmitBraces ? parseOptional : parseExpected)(17);
+                result.type = doInsideOfContext(2097152, parseJSDocType);
                 if (!mayOmitBraces || hasBrace) {
-                    parseExpected(18 /* CloseBraceToken */);
+                    parseExpected(18);
                 }
                 fixupParentReferences(result);
                 return finishNode(result);
             }
             JSDocParser.parseJSDocTypeExpression = parseJSDocTypeExpression;
             function parseIsolatedJSDocComment(content, start, length) {
-                initializeState(content, 6 /* Latest */, /*_syntaxCursor:*/ undefined, 1 /* JS */);
-                sourceFile = { languageVariant: 0 /* Standard */, text: content }; // tslint:disable-line no-object-literal-type-assertion
+                initializeState(content, 6, undefined, 1);
+                sourceFile = { languageVariant: 0, text: content };
                 var jsDoc = parseJSDocCommentWorker(start, length);
                 var diagnostics = parseDiagnostics;
                 clearState();
@@ -20553,7 +16454,7 @@ var ts;
                 if (comment) {
                     comment.parent = parent;
                 }
-                if (contextFlags & 65536 /* JavaScriptFile */) {
+                if (contextFlags & 65536) {
                     if (!sourceFile.jsDocDiagnostics) {
                         sourceFile.jsDocDiagnostics = [];
                     }
@@ -20565,18 +16466,6 @@ var ts;
                 return comment;
             }
             JSDocParser.parseJSDocComment = parseJSDocComment;
-            var JSDocState;
-            (function (JSDocState) {
-                JSDocState[JSDocState["BeginningOfLine"] = 0] = "BeginningOfLine";
-                JSDocState[JSDocState["SawAsterisk"] = 1] = "SawAsterisk";
-                JSDocState[JSDocState["SavingComments"] = 2] = "SavingComments";
-            })(JSDocState || (JSDocState = {}));
-            var PropertyLikeParse;
-            (function (PropertyLikeParse) {
-                PropertyLikeParse[PropertyLikeParse["Property"] = 1] = "Property";
-                PropertyLikeParse[PropertyLikeParse["Parameter"] = 2] = "Parameter";
-                PropertyLikeParse[PropertyLikeParse["CallbackParameter"] = 4] = "CallbackParameter";
-            })(PropertyLikeParse || (PropertyLikeParse = {}));
             function parseJSDocCommentWorker(start, length) {
                 if (start === void 0) { start = 0; }
                 var content = sourceText;
@@ -20590,17 +16479,12 @@ var ts;
                 var tagsEnd;
                 var comments = [];
                 var result;
-                // Check for /** (JSDoc opening part)
                 if (!isJSDocLikeText(content, start)) {
                     return result;
                 }
-                // + 3 for leading /**, - 5 in total for /** */
                 scanner.scanRange(start + 3, length - 5, function () {
-                    // Initially we can parse out a tag.  We also have seen a starting asterisk.
-                    // This is so that /** * @type */ doesn't parse.
-                    var state = 1 /* SawAsterisk */;
+                    var state = 1;
                     var margin;
-                    // + 4 for leading '/** '
                     var indent = start - Math.max(content.lastIndexOf("\n", start), 0) + 4;
                     function pushComment(text) {
                         if (!margin) {
@@ -20610,22 +16494,19 @@ var ts;
                         indent += text.length;
                     }
                     nextJSDocToken();
-                    while (parseOptionalJsdoc(5 /* WhitespaceTrivia */))
+                    while (parseOptionalJsdoc(5))
                         ;
-                    if (parseOptionalJsdoc(4 /* NewLineTrivia */)) {
-                        state = 0 /* BeginningOfLine */;
+                    if (parseOptionalJsdoc(4)) {
+                        state = 0;
                         indent = 0;
                     }
                     loop: while (true) {
                         switch (token()) {
-                            case 57 /* AtToken */:
-                                if (state === 0 /* BeginningOfLine */ || state === 1 /* SawAsterisk */) {
+                            case 57:
+                                if (state === 0 || state === 1) {
                                     removeTrailingNewlines(comments);
                                     addTag(parseTag(indent));
-                                    // NOTE: According to usejsdoc.org, a tag goes to end of line, except the last tag.
-                                    // Real-world comments may break this rule, so "BeginningOfLine" will not be a real line beginning
-                                    // for malformed examples like `/** @param {string} x @returns {number} the length */`
-                                    state = 0 /* BeginningOfLine */;
+                                    state = 0;
                                     margin = undefined;
                                     indent++;
                                 }
@@ -20633,35 +16514,29 @@ var ts;
                                     pushComment(scanner.getTokenText());
                                 }
                                 break;
-                            case 4 /* NewLineTrivia */:
+                            case 4:
                                 comments.push(scanner.getTokenText());
-                                state = 0 /* BeginningOfLine */;
+                                state = 0;
                                 indent = 0;
                                 break;
-                            case 39 /* AsteriskToken */:
+                            case 39:
                                 var asterisk = scanner.getTokenText();
-                                if (state === 1 /* SawAsterisk */ || state === 2 /* SavingComments */) {
-                                    // If we've already seen an asterisk, then we can no longer parse a tag on this line
-                                    state = 2 /* SavingComments */;
+                                if (state === 1 || state === 2) {
+                                    state = 2;
                                     pushComment(asterisk);
                                 }
                                 else {
-                                    // Ignore the first asterisk on a line
-                                    state = 1 /* SawAsterisk */;
+                                    state = 1;
                                     indent += asterisk.length;
                                 }
                                 break;
-                            case 71 /* Identifier */:
-                                // Anything else is doc comment text. We just save it. Because it
-                                // wasn't a tag, we can no longer parse a tag on this line until we hit the next
-                                // line break.
+                            case 71:
                                 pushComment(scanner.getTokenText());
-                                state = 2 /* SavingComments */;
+                                state = 2;
                                 break;
-                            case 5 /* WhitespaceTrivia */:
-                                // only collect whitespace if we're already saving comments or have just crossed the comment indent margin
+                            case 5:
                                 var whitespace = scanner.getTokenText();
-                                if (state === 2 /* SavingComments */) {
+                                if (state === 2) {
                                     comments.push(whitespace);
                                 }
                                 else if (margin !== undefined && indent + whitespace.length > margin) {
@@ -20669,11 +16544,10 @@ var ts;
                                 }
                                 indent += whitespace.length;
                                 break;
-                            case 1 /* EndOfFileToken */:
+                            case 1:
                                 break loop;
                             default:
-                                // anything other than whitespace or asterisk at the beginning of the line starts the comment text
-                                state = 2 /* SavingComments */;
+                                state = 2;
                                 pushComment(scanner.getTokenText());
                                 break;
                         }
@@ -20695,36 +16569,35 @@ var ts;
                     }
                 }
                 function createJSDocComment() {
-                    var result = createNode(286 /* JSDocComment */, start);
+                    var result = createNode(286, start);
                     result.tags = tags && createNodeArray(tags, tagsPos, tagsEnd);
                     result.comment = comments.length ? comments.join("") : undefined;
                     return finishNode(result, end);
                 }
                 function isNextNonwhitespaceTokenEndOfFile() {
-                    // We must use infinite lookahead, as there could be any number of newlines :(
                     while (true) {
                         nextJSDocToken();
-                        if (token() === 1 /* EndOfFileToken */) {
+                        if (token() === 1) {
                             return true;
                         }
-                        if (!(token() === 5 /* WhitespaceTrivia */ || token() === 4 /* NewLineTrivia */)) {
+                        if (!(token() === 5 || token() === 4)) {
                             return false;
                         }
                     }
                 }
                 function skipWhitespace() {
-                    if (token() === 5 /* WhitespaceTrivia */ || token() === 4 /* NewLineTrivia */) {
+                    if (token() === 5 || token() === 4) {
                         if (lookAhead(isNextNonwhitespaceTokenEndOfFile)) {
-                            return; // Don't skip whitespace prior to EoF (or end of comment) - that shouldn't be included in any node's range
+                            return;
                         }
                     }
-                    while (token() === 5 /* WhitespaceTrivia */ || token() === 4 /* NewLineTrivia */) {
+                    while (token() === 5 || token() === 4) {
                         nextJSDocToken();
                     }
                 }
                 function parseTag(indent) {
-                    ts.Debug.assert(token() === 57 /* AtToken */);
-                    var atToken = createNode(57 /* AtToken */, scanner.getTokenPos());
+                    ts.Debug.assert(token() === 57);
+                    var atToken = createNode(57, scanner.getTokenPos());
                     atToken.end = scanner.getTextPos();
                     nextJSDocToken();
                     var tagName = parseJSDocIdentifierName();
@@ -20742,7 +16615,7 @@ var ts;
                         case "arg":
                         case "argument":
                         case "param":
-                            return parseParameterOrPropertyTag(atToken, tagName, 2 /* Parameter */, indent);
+                            return parseParameterOrPropertyTag(atToken, tagName, 2, indent);
                         case "return":
                         case "returns":
                             tag = parseReturnTag(atToken, tagName);
@@ -20764,14 +16637,13 @@ var ts;
                             break;
                     }
                     if (!tag.comment) {
-                        // some tags, like typedef and callback, have already parsed their comments earlier
                         tag.comment = parseTagComments(indent + tag.end - tag.pos);
                     }
                     return tag;
                 }
                 function parseTagComments(indent) {
                     var comments = [];
-                    var state = 0 /* BeginningOfLine */;
+                    var state = 0;
                     var margin;
                     function pushComment(text) {
                         if (!margin) {
@@ -20783,43 +16655,37 @@ var ts;
                     var tok = token();
                     loop: while (true) {
                         switch (tok) {
-                            case 4 /* NewLineTrivia */:
-                                if (state >= 1 /* SawAsterisk */) {
-                                    state = 0 /* BeginningOfLine */;
+                            case 4:
+                                if (state >= 1) {
+                                    state = 0;
                                     comments.push(scanner.getTokenText());
                                 }
                                 indent = 0;
                                 break;
-                            case 57 /* AtToken */:
+                            case 57:
                                 scanner.setTextPos(scanner.getTextPos() - 1);
-                            // falls through
-                            case 1 /* EndOfFileToken */:
-                                // Done
+                            case 1:
                                 break loop;
-                            case 5 /* WhitespaceTrivia */:
-                                if (state === 2 /* SavingComments */) {
+                            case 5:
+                                if (state === 2) {
                                     pushComment(scanner.getTokenText());
                                 }
                                 else {
                                     var whitespace = scanner.getTokenText();
-                                    // if the whitespace crosses the margin, take only the whitespace that passes the margin
                                     if (margin !== undefined && indent + whitespace.length > margin) {
                                         comments.push(whitespace.slice(margin - indent - 1));
                                     }
                                     indent += whitespace.length;
                                 }
                                 break;
-                            case 39 /* AsteriskToken */:
-                                if (state === 0 /* BeginningOfLine */) {
-                                    // leading asterisks start recording on the *next* (non-whitespace) token
-                                    state = 1 /* SawAsterisk */;
+                            case 39:
+                                if (state === 0) {
+                                    state = 1;
                                     indent += 1;
                                     break;
                                 }
-                            // record the * as a comment
-                            // falls through
                             default:
-                                state = 2 /* SavingComments */; // leading identifiers start recording as well
+                                state = 2;
                                 pushComment(scanner.getTokenText());
                                 break;
                         }
@@ -20830,7 +16696,7 @@ var ts;
                     return comments.length === 0 ? undefined : comments.join("");
                 }
                 function parseUnknownTag(atToken, tagName) {
-                    var result = createNode(289 /* JSDocTag */, atToken.pos);
+                    var result = createNode(289, atToken.pos);
                     result.atToken = atToken;
                     result.tagName = tagName;
                     return finishNode(result);
@@ -20850,31 +16716,28 @@ var ts;
                 }
                 function tryParseTypeExpression() {
                     skipWhitespace();
-                    return token() === 17 /* OpenBraceToken */ ? parseJSDocTypeExpression() : undefined;
+                    return token() === 17 ? parseJSDocTypeExpression() : undefined;
                 }
                 function parseBracketNameInPropertyAndParamTag() {
-                    if (token() === 13 /* NoSubstitutionTemplateLiteral */) {
-                        // a markdown-quoted name: `arg` is not legal jsdoc, but occurs in the wild
-                        return { name: createIdentifier(/*isIdentifier*/ true), isBracketed: false };
+                    if (token() === 13) {
+                        return { name: createIdentifier(true), isBracketed: false };
                     }
-                    // Looking for something like '[foo]', 'foo', '[foo.bar]' or 'foo.bar'
-                    var isBracketed = parseOptional(21 /* OpenBracketToken */);
+                    var isBracketed = parseOptional(21);
                     var name = parseJSDocEntityName();
                     if (isBracketed) {
                         skipWhitespace();
-                        // May have an optional default, e.g. '[foo = 42]'
-                        if (parseOptionalToken(58 /* EqualsToken */)) {
+                        if (parseOptionalToken(58)) {
                             parseExpression();
                         }
-                        parseExpected(22 /* CloseBracketToken */);
+                        parseExpected(22);
                     }
                     return { name: name, isBracketed: isBracketed };
                 }
                 function isObjectOrObjectArrayTypeReference(node) {
                     switch (node.kind) {
-                        case 135 /* ObjectKeyword */:
+                        case 135:
                             return true;
-                        case 167 /* ArrayType */:
+                        case 167:
                             return isObjectOrObjectArrayTypeReference(node.elementType);
                         default:
                             return ts.isTypeReferenceNode(node) && ts.isIdentifier(node.typeName) && node.typeName.escapedText === "Object";
@@ -20889,13 +16752,13 @@ var ts;
                     if (isNameFirst) {
                         typeExpression = tryParseTypeExpression();
                     }
-                    var result = target === 1 /* Property */ ?
-                        createNode(298 /* JSDocPropertyTag */, atToken.pos) :
-                        createNode(293 /* JSDocParameterTag */, atToken.pos);
+                    var result = target === 1 ?
+                        createNode(298, atToken.pos) :
+                        createNode(293, atToken.pos);
                     var comment;
                     if (indent !== undefined)
                         comment = parseTagComments(indent + scanner.getStartPos() - atToken.pos);
-                    var nestedTypeLiteral = target !== 4 /* CallbackParameter */ && parseNestedTypeLiteral(typeExpression, name, target);
+                    var nestedTypeLiteral = target !== 4 && parseNestedTypeLiteral(typeExpression, name, target);
                     if (nestedTypeLiteral) {
                         typeExpression = nestedTypeLiteral;
                         isNameFirst = true;
@@ -20911,20 +16774,20 @@ var ts;
                 }
                 function parseNestedTypeLiteral(typeExpression, name, target) {
                     if (typeExpression && isObjectOrObjectArrayTypeReference(typeExpression.type)) {
-                        var typeLiteralExpression = createNode(278 /* JSDocTypeExpression */, scanner.getTokenPos());
+                        var typeLiteralExpression = createNode(278, scanner.getTokenPos());
                         var child = void 0;
                         var jsdocTypeLiteral = void 0;
                         var start_2 = scanner.getStartPos();
                         var children = void 0;
                         while (child = tryParse(function () { return parseChildParameterOrPropertyTag(target, name); })) {
-                            if (child.kind === 293 /* JSDocParameterTag */ || child.kind === 298 /* JSDocPropertyTag */) {
+                            if (child.kind === 293 || child.kind === 298) {
                                 children = ts.append(children, child);
                             }
                         }
                         if (children) {
-                            jsdocTypeLiteral = createNode(287 /* JSDocTypeLiteral */, start_2);
+                            jsdocTypeLiteral = createNode(287, start_2);
                             jsdocTypeLiteral.jsDocPropertyTags = children;
-                            if (typeExpression.type.kind === 167 /* ArrayType */) {
+                            if (typeExpression.type.kind === 167) {
                                 jsdocTypeLiteral.isArrayType = true;
                             }
                             typeLiteralExpression.type = finishNode(jsdocTypeLiteral);
@@ -20933,47 +16796,47 @@ var ts;
                     }
                 }
                 function parseReturnTag(atToken, tagName) {
-                    if (ts.forEach(tags, function (t) { return t.kind === 294 /* JSDocReturnTag */; })) {
+                    if (ts.forEach(tags, function (t) { return t.kind === 294; })) {
                         parseErrorAt(tagName.pos, scanner.getTokenPos(), ts.Diagnostics._0_tag_already_specified, tagName.escapedText);
                     }
-                    var result = createNode(294 /* JSDocReturnTag */, atToken.pos);
+                    var result = createNode(294, atToken.pos);
                     result.atToken = atToken;
                     result.tagName = tagName;
                     result.typeExpression = tryParseTypeExpression();
                     return finishNode(result);
                 }
                 function parseTypeTag(atToken, tagName) {
-                    if (ts.forEach(tags, function (t) { return t.kind === 295 /* JSDocTypeTag */; })) {
+                    if (ts.forEach(tags, function (t) { return t.kind === 295; })) {
                         parseErrorAt(tagName.pos, scanner.getTokenPos(), ts.Diagnostics._0_tag_already_specified, tagName.escapedText);
                     }
-                    var result = createNode(295 /* JSDocTypeTag */, atToken.pos);
+                    var result = createNode(295, atToken.pos);
                     result.atToken = atToken;
                     result.tagName = tagName;
-                    result.typeExpression = parseJSDocTypeExpression(/*mayOmitBraces*/ true);
+                    result.typeExpression = parseJSDocTypeExpression(true);
                     return finishNode(result);
                 }
                 function parseAugmentsTag(atToken, tagName) {
-                    var result = createNode(290 /* JSDocAugmentsTag */, atToken.pos);
+                    var result = createNode(290, atToken.pos);
                     result.atToken = atToken;
                     result.tagName = tagName;
                     result.class = parseExpressionWithTypeArgumentsForAugments();
                     return finishNode(result);
                 }
                 function parseExpressionWithTypeArgumentsForAugments() {
-                    var usedBrace = parseOptional(17 /* OpenBraceToken */);
-                    var node = createNode(207 /* ExpressionWithTypeArguments */);
+                    var usedBrace = parseOptional(17);
+                    var node = createNode(207);
                     node.expression = parsePropertyAccessEntityNameExpression();
                     node.typeArguments = tryParseTypeArguments();
                     var res = finishNode(node);
                     if (usedBrace) {
-                        parseExpected(18 /* CloseBraceToken */);
+                        parseExpected(18);
                     }
                     return res;
                 }
                 function parsePropertyAccessEntityNameExpression() {
                     var node = parseJSDocIdentifierName();
-                    while (parseOptional(23 /* DotToken */)) {
-                        var prop = createNode(185 /* PropertyAccessExpression */, node.pos);
+                    while (parseOptional(23)) {
+                        var prop = createNode(185, node.pos);
                         prop.expression = node;
                         prop.name = parseJSDocIdentifierName();
                         node = finishNode(prop);
@@ -20981,7 +16844,7 @@ var ts;
                     return node;
                 }
                 function parseClassTag(atToken, tagName) {
-                    var tag = createNode(291 /* JSDocClassTag */, atToken.pos);
+                    var tag = createNode(291, atToken.pos);
                     tag.atToken = atToken;
                     tag.tagName = tagName;
                     return finishNode(tag);
@@ -20989,7 +16852,7 @@ var ts;
                 function parseTypedefTag(atToken, tagName, indent) {
                     var typeExpression = tryParseTypeExpression();
                     skipWhitespace();
-                    var typedefTag = createNode(297 /* JSDocTypedefTag */, atToken.pos);
+                    var typedefTag = createNode(297, atToken.pos);
                     typedefTag.atToken = atToken;
                     typedefTag.tagName = tagName;
                     typedefTag.fullName = parseJSDocTypeNameWithNamespace();
@@ -21005,9 +16868,9 @@ var ts;
                         var start_3 = scanner.getStartPos();
                         while (child = tryParse(function () { return parseChildPropertyTag(); })) {
                             if (!jsdocTypeLiteral) {
-                                jsdocTypeLiteral = createNode(287 /* JSDocTypeLiteral */, start_3);
+                                jsdocTypeLiteral = createNode(287, start_3);
                             }
-                            if (child.kind === 295 /* JSDocTypeTag */) {
+                            if (child.kind === 295) {
                                 if (childTypeTag) {
                                     break;
                                 }
@@ -21020,7 +16883,7 @@ var ts;
                             }
                         }
                         if (jsdocTypeLiteral) {
-                            if (typeExpression && typeExpression.type.kind === 167 /* ArrayType */) {
+                            if (typeExpression && typeExpression.type.kind === 167) {
                                 jsdocTypeLiteral.isArrayType = true;
                             }
                             typedefTag.typeExpression = childTypeTag && childTypeTag.typeExpression && !isObjectOrObjectArrayTypeReference(childTypeTag.typeExpression.type) ?
@@ -21029,7 +16892,6 @@ var ts;
                             end = typedefTag.typeExpression.end;
                         }
                     }
-                    // Only include the characters between the name end and the next token if a comment was actually parsed out - otherwise it's just whitespace
                     return finishNode(typedefTag, end || typedefTag.comment !== undefined ? scanner.getStartPos() : (typedefTag.fullName || typedefTag.typeExpression || typedefTag.tagName).end);
                 }
                 function parseJSDocTypeNameWithNamespace(nested) {
@@ -21038,13 +16900,13 @@ var ts;
                         return undefined;
                     }
                     var typeNameOrNamespaceName = parseJSDocIdentifierName();
-                    if (parseOptional(23 /* DotToken */)) {
-                        var jsDocNamespaceNode = createNode(239 /* ModuleDeclaration */, pos);
+                    if (parseOptional(23)) {
+                        var jsDocNamespaceNode = createNode(239, pos);
                         if (nested) {
-                            jsDocNamespaceNode.flags |= 4 /* NestedNamespace */;
+                            jsDocNamespaceNode.flags |= 4;
                         }
                         jsDocNamespaceNode.name = typeNameOrNamespaceName;
-                        jsDocNamespaceNode.body = parseJSDocTypeNameWithNamespace(/*nested*/ true);
+                        jsDocNamespaceNode.body = parseJSDocTypeNameWithNamespace(true);
                         return finishNode(jsDocNamespaceNode);
                     }
                     if (nested) {
@@ -21053,7 +16915,7 @@ var ts;
                     return typeNameOrNamespaceName;
                 }
                 function parseCallbackTag(atToken, tagName, indent) {
-                    var callbackTag = createNode(292 /* JSDocCallbackTag */, atToken.pos);
+                    var callbackTag = createNode(292, atToken.pos);
                     callbackTag.atToken = atToken;
                     callbackTag.tagName = tagName;
                     callbackTag.fullName = parseJSDocTypeNameWithNamespace();
@@ -21062,15 +16924,15 @@ var ts;
                     callbackTag.comment = parseTagComments(indent);
                     var child;
                     var start = scanner.getStartPos();
-                    var jsdocSignature = createNode(288 /* JSDocSignature */, start);
+                    var jsdocSignature = createNode(288, start);
                     jsdocSignature.parameters = [];
-                    while (child = tryParse(function () { return parseChildParameterOrPropertyTag(4 /* CallbackParameter */); })) {
+                    while (child = tryParse(function () { return parseChildParameterOrPropertyTag(4); })) {
                         jsdocSignature.parameters = ts.append(jsdocSignature.parameters, child);
                     }
                     var returnTag = tryParse(function () {
-                        if (parseOptionalJsdoc(57 /* AtToken */)) {
+                        if (parseOptionalJsdoc(57)) {
                             var tag = parseTag(indent);
-                            if (tag && tag.kind === 294 /* JSDocReturnTag */) {
+                            if (tag && tag.kind === 294) {
                                 return tag;
                             }
                         }
@@ -21105,46 +16967,46 @@ var ts;
                     return a.escapedText === b.escapedText;
                 }
                 function parseChildPropertyTag() {
-                    return parseChildParameterOrPropertyTag(1 /* Property */);
+                    return parseChildParameterOrPropertyTag(1);
                 }
                 function parseChildParameterOrPropertyTag(target, name) {
                     var canParseTag = true;
                     var seenAsterisk = false;
                     while (true) {
                         switch (nextJSDocToken()) {
-                            case 57 /* AtToken */:
+                            case 57:
                                 if (canParseTag) {
                                     var child = tryParseChildTag(target);
-                                    if (child && child.kind === 293 /* JSDocParameterTag */ &&
-                                        target !== 4 /* CallbackParameter */ &&
-                                        (ts.isIdentifier(child.name) || !escapedTextsEqual(name, child.name.left))) { // TODO: GH#18217
+                                    if (child && child.kind === 293 &&
+                                        target !== 4 &&
+                                        (ts.isIdentifier(child.name) || !escapedTextsEqual(name, child.name.left))) {
                                         return false;
                                     }
                                     return child;
                                 }
                                 seenAsterisk = false;
                                 break;
-                            case 4 /* NewLineTrivia */:
+                            case 4:
                                 canParseTag = true;
                                 seenAsterisk = false;
                                 break;
-                            case 39 /* AsteriskToken */:
+                            case 39:
                                 if (seenAsterisk) {
                                     canParseTag = false;
                                 }
                                 seenAsterisk = true;
                                 break;
-                            case 71 /* Identifier */:
+                            case 71:
                                 canParseTag = false;
                                 break;
-                            case 1 /* EndOfFileToken */:
+                            case 1:
                                 return false;
                         }
                     }
                 }
                 function tryParseChildTag(target) {
-                    ts.Debug.assert(token() === 57 /* AtToken */);
-                    var atToken = createNode(57 /* AtToken */);
+                    ts.Debug.assert(token() === 57);
+                    var atToken = createNode(57);
                     atToken.end = scanner.getTextPos();
                     nextJSDocToken();
                     var tagName = parseJSDocIdentifierName();
@@ -21152,15 +17014,15 @@ var ts;
                     var t;
                     switch (tagName.escapedText) {
                         case "type":
-                            return target === 1 /* Property */ && parseTypeTag(atToken, tagName);
+                            return target === 1 && parseTypeTag(atToken, tagName);
                         case "prop":
                         case "property":
-                            t = 1 /* Property */;
+                            t = 1;
                             break;
                         case "arg":
                         case "argument":
                         case "param":
-                            t = 2 /* Parameter */ | 4 /* CallbackParameter */;
+                            t = 2 | 4;
                             break;
                         default:
                             return false;
@@ -21168,30 +17030,29 @@ var ts;
                     if (!(target & t)) {
                         return false;
                     }
-                    var tag = parseParameterOrPropertyTag(atToken, tagName, target, /*indent*/ undefined);
+                    var tag = parseParameterOrPropertyTag(atToken, tagName, target, undefined);
                     tag.comment = parseTagComments(tag.end - tag.pos);
                     return tag;
                 }
                 function parseTemplateTag(atToken, tagName) {
-                    // the template tag looks like '@template {Constraint} T,U,V'
                     var constraint;
-                    if (token() === 17 /* OpenBraceToken */) {
+                    if (token() === 17) {
                         constraint = parseJSDocTypeExpression();
                     }
                     var typeParameters = [];
                     var typeParametersPos = getNodePos();
                     do {
                         skipWhitespace();
-                        var typeParameter = createNode(148 /* TypeParameter */);
+                        var typeParameter = createNode(148);
                         typeParameter.name = parseJSDocIdentifierName(ts.Diagnostics.Unexpected_token_A_type_parameter_name_was_expected_without_curly_braces);
                         skipWhitespace();
                         finishNode(typeParameter);
                         typeParameters.push(typeParameter);
-                    } while (parseOptionalJsdoc(26 /* CommaToken */));
+                    } while (parseOptionalJsdoc(26));
                     if (constraint) {
                         ts.first(typeParameters).constraint = constraint.type;
                     }
-                    var result = createNode(296 /* JSDocTemplateTag */, atToken.pos);
+                    var result = createNode(296, atToken.pos);
                     result.atToken = atToken;
                     result.tagName = tagName;
                     result.typeParameters = createNodeArray(typeParameters, typeParametersPos);
@@ -21210,16 +17071,13 @@ var ts;
                 }
                 function parseJSDocEntityName() {
                     var entity = parseJSDocIdentifierName();
-                    if (parseOptional(21 /* OpenBracketToken */)) {
-                        parseExpected(22 /* CloseBracketToken */);
-                        // Note that y[] is accepted as an entity name, but the postfix brackets are not saved for checking.
-                        // Technically usejsdoc.org requires them for specifying a property of a type equivalent to Array<{ x: ...}>
-                        // but it's not worth it to enforce that restriction.
+                    if (parseOptional(21)) {
+                        parseExpected(22);
                     }
-                    while (parseOptional(23 /* DotToken */)) {
+                    while (parseOptional(23)) {
                         var name = parseJSDocIdentifierName();
-                        if (parseOptional(21 /* OpenBracketToken */)) {
-                            parseExpected(22 /* CloseBracketToken */);
+                        if (parseOptional(21)) {
+                            parseExpected(22);
                         }
                         entity = createQualifiedName(entity, name);
                     }
@@ -21227,11 +17085,11 @@ var ts;
                 }
                 function parseJSDocIdentifierName(message) {
                     if (!ts.tokenIsIdentifierOrKeyword(token())) {
-                        return createMissingNode(71 /* Identifier */, /*reportAtCurrentPosition*/ !message, message || ts.Diagnostics.Identifier_expected);
+                        return createMissingNode(71, !message, message || ts.Diagnostics.Identifier_expected);
                     }
                     var pos = scanner.getTokenPos();
                     var end = scanner.getTextPos();
-                    var result = createNode(71 /* Identifier */, pos);
+                    var result = createNode(71, pos);
                     result.escapedText = ts.escapeLeadingUnderscores(scanner.getTokenText());
                     finishNode(result, end);
                     nextJSDocToken();
@@ -21244,72 +17102,27 @@ var ts;
     var IncrementalParser;
     (function (IncrementalParser) {
         function updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks) {
-            aggressiveChecks = aggressiveChecks || ts.Debug.shouldAssert(2 /* Aggressive */);
+            aggressiveChecks = aggressiveChecks || ts.Debug.shouldAssert(2);
             checkChangeRange(sourceFile, newText, textChangeRange, aggressiveChecks);
             if (ts.textChangeRangeIsUnchanged(textChangeRange)) {
-                // if the text didn't change, then we can just return our current source file as-is.
                 return sourceFile;
             }
             if (sourceFile.statements.length === 0) {
-                // If we don't have any statements in the current source file, then there's no real
-                // way to incrementally parse.  So just do a full parse instead.
-                return Parser.parseSourceFile(sourceFile.fileName, newText, sourceFile.languageVersion, /*syntaxCursor*/ undefined, /*setParentNodes*/ true, sourceFile.scriptKind);
-            }
-            // Make sure we're not trying to incrementally update a source file more than once.  Once
-            // we do an update the original source file is considered unusable from that point onwards.
-            //
-            // This is because we do incremental parsing in-place.  i.e. we take nodes from the old
-            // tree and give them new positions and parents.  From that point on, trusting the old
-            // tree at all is not possible as far too much of it may violate invariants.
+                return Parser.parseSourceFile(sourceFile.fileName, newText, sourceFile.languageVersion, undefined, true, sourceFile.scriptKind);
+            }
             var incrementalSourceFile = sourceFile;
             ts.Debug.assert(!incrementalSourceFile.hasBeenIncrementallyParsed);
             incrementalSourceFile.hasBeenIncrementallyParsed = true;
             var oldText = sourceFile.text;
             var syntaxCursor = createSyntaxCursor(sourceFile);
-            // Make the actual change larger so that we know to reparse anything whose lookahead
-            // might have intersected the change.
             var changeRange = extendToAffectedRange(sourceFile, textChangeRange);
             checkChangeRange(sourceFile, newText, changeRange, aggressiveChecks);
-            // Ensure that extending the affected range only moved the start of the change range
-            // earlier in the file.
             ts.Debug.assert(changeRange.span.start <= textChangeRange.span.start);
             ts.Debug.assert(ts.textSpanEnd(changeRange.span) === ts.textSpanEnd(textChangeRange.span));
             ts.Debug.assert(ts.textSpanEnd(ts.textChangeRangeNewSpan(changeRange)) === ts.textSpanEnd(ts.textChangeRangeNewSpan(textChangeRange)));
-            // The is the amount the nodes after the edit range need to be adjusted.  It can be
-            // positive (if the edit added characters), negative (if the edit deleted characters)
-            // or zero (if this was a pure overwrite with nothing added/removed).
             var delta = ts.textChangeRangeNewSpan(changeRange).length - changeRange.span.length;
-            // If we added or removed characters during the edit, then we need to go and adjust all
-            // the nodes after the edit.  Those nodes may move forward (if we inserted chars) or they
-            // may move backward (if we deleted chars).
-            //
-            // Doing this helps us out in two ways.  First, it means that any nodes/tokens we want
-            // to reuse are already at the appropriate position in the new text.  That way when we
-            // reuse them, we don't have to figure out if they need to be adjusted.  Second, it makes
-            // it very easy to determine if we can reuse a node.  If the node's position is at where
-            // we are in the text, then we can reuse it.  Otherwise we can't.  If the node's position
-            // is ahead of us, then we'll need to rescan tokens.  If the node's position is behind
-            // us, then we'll need to skip it or crumble it as appropriate
-            //
-            // We will also adjust the positions of nodes that intersect the change range as well.
-            // By doing this, we ensure that all the positions in the old tree are consistent, not
-            // just the positions of nodes entirely before/after the change range.  By being
-            // consistent, we can then easily map from positions to nodes in the old tree easily.
-            //
-            // Also, mark any syntax elements that intersect the changed span.  We know, up front,
-            // that we cannot reuse these elements.
             updateTokenPositionsAndMarkElements(incrementalSourceFile, changeRange.span.start, ts.textSpanEnd(changeRange.span), ts.textSpanEnd(ts.textChangeRangeNewSpan(changeRange)), delta, oldText, newText, aggressiveChecks);
-            // Now that we've set up our internal incremental state just proceed and parse the
-            // source file in the normal fashion.  When possible the parser will retrieve and
-            // reuse nodes from the old tree.
-            //
-            // Note: passing in 'true' for setNodeParents is very important.  When incrementally
-            // parsing, we will be reusing nodes from the old tree, and placing it into new
-            // parents.  If we don't set the parents now, we'll end up with an observably
-            // inconsistent tree.  Setting the parents on the new tree should be very fast.  We
-            // will immediately bail out of walking any subtrees when we can see that their parents
-            // are already correct.
-            var result = Parser.parseSourceFile(sourceFile.fileName, newText, sourceFile.languageVersion, syntaxCursor, /*setParentNodes*/ true, sourceFile.scriptKind);
+            var result = Parser.parseSourceFile(sourceFile.fileName, newText, sourceFile.languageVersion, syntaxCursor, true, sourceFile.scriptKind);
             return result;
         }
         IncrementalParser.updateSourceFile = updateSourceFile;
@@ -21326,8 +17139,6 @@ var ts;
                 if (aggressiveChecks && shouldCheckNode(node)) {
                     text = oldText.substring(node.pos, node.end);
                 }
-                // Ditch any existing LS children we may have created.  This way we can avoid
-                // moving them forward.
                 if (node._children) {
                     node._children = undefined;
                 }
@@ -21349,17 +17160,17 @@ var ts;
                 array._children = undefined;
                 array.pos += delta;
                 array.end += delta;
-                for (var _i = 0, array_1 = array; _i < array_1.length; _i++) {
-                    var node = array_1[_i];
+                for (var _i = 0, array_8 = array; _i < array_8.length; _i++) {
+                    var node = array_8[_i];
                     visitNode(node);
                 }
             }
         }
         function shouldCheckNode(node) {
             switch (node.kind) {
-                case 9 /* StringLiteral */:
-                case 8 /* NumericLiteral */:
-                case 71 /* Identifier */:
+                case 9:
+                case 8:
+                case 71:
                     return true;
             }
             return false;
@@ -21368,63 +17179,11 @@ var ts;
             ts.Debug.assert(element.end >= changeStart, "Adjusting an element that was entirely before the change range");
             ts.Debug.assert(element.pos <= changeRangeOldEnd, "Adjusting an element that was entirely after the change range");
             ts.Debug.assert(element.pos <= element.end);
-            // We have an element that intersects the change range in some way.  It may have its
-            // start, or its end (or both) in the changed range.  We want to adjust any part
-            // that intersects such that the final tree is in a consistent state.  i.e. all
-            // children have spans within the span of their parent, and all siblings are ordered
-            // properly.
-            // We may need to update both the 'pos' and the 'end' of the element.
-            // If the 'pos' is before the start of the change, then we don't need to touch it.
-            // If it isn't, then the 'pos' must be inside the change.  How we update it will
-            // depend if delta is positive or negative. If delta is positive then we have
-            // something like:
-            //
-            //  -------------------AAA-----------------
-            //  -------------------BBBCCCCCCC-----------------
-            //
-            // In this case, we consider any node that started in the change range to still be
-            // starting at the same position.
-            //
-            // however, if the delta is negative, then we instead have something like this:
-            //
-            //  -------------------XXXYYYYYYY-----------------
-            //  -------------------ZZZ-----------------
-            //
-            // In this case, any element that started in the 'X' range will keep its position.
-            // However any element that started after that will have their pos adjusted to be
-            // at the end of the new range.  i.e. any node that started in the 'Y' range will
-            // be adjusted to have their start at the end of the 'Z' range.
-            //
-            // The element will keep its position if possible.  Or Move backward to the new-end
-            // if it's in the 'Y' range.
             element.pos = Math.min(element.pos, changeRangeNewEnd);
-            // If the 'end' is after the change range, then we always adjust it by the delta
-            // amount.  However, if the end is in the change range, then how we adjust it
-            // will depend on if delta is positive or negative.  If delta is positive then we
-            // have something like:
-            //
-            //  -------------------AAA-----------------
-            //  -------------------BBBCCCCCCC-----------------
-            //
-            // In this case, we consider any node that ended inside the change range to keep its
-            // end position.
-            //
-            // however, if the delta is negative, then we instead have something like this:
-            //
-            //  -------------------XXXYYYYYYY-----------------
-            //  -------------------ZZZ-----------------
-            //
-            // In this case, any element that ended in the 'X' range will keep its position.
-            // However any element that ended after that will have their pos adjusted to be
-            // at the end of the new range.  i.e. any node that ended in the 'Y' range will
-            // be adjusted to have their end at the end of the 'Z' range.
             if (element.end >= changeRangeOldEnd) {
-                // Element ends after the change range.  Always adjust the end pos.
                 element.end += delta;
             }
             else {
-                // Element ends in the change range.  The element will keep its position if
-                // possible. Or Move backward to the new-end if it's in the 'Y' range.
                 element.end = Math.min(element.end, changeRangeNewEnd);
             }
             ts.Debug.assert(element.pos <= element.end);
@@ -21456,19 +17215,13 @@ var ts;
             function visitNode(child) {
                 ts.Debug.assert(child.pos <= child.end);
                 if (child.pos > changeRangeOldEnd) {
-                    // Node is entirely past the change range.  We need to move both its pos and
-                    // end, forward or backward appropriately.
-                    moveElementEntirelyPastChangeRange(child, /*isArray*/ false, delta, oldText, newText, aggressiveChecks);
+                    moveElementEntirelyPastChangeRange(child, false, delta, oldText, newText, aggressiveChecks);
                     return;
                 }
-                // Check if the element intersects the change range.  If it does, then it is not
-                // reusable.  Also, we'll need to recurse to see what constituent portions we may
-                // be able to use.
                 var fullEnd = child.end;
                 if (fullEnd >= changeStart) {
                     child.intersectsChange = true;
                     child._children = undefined;
-                    // Adjust the pos or end (or both) of the intersecting element accordingly.
                     adjustIntersectingElement(child, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta);
                     forEachChild(child, visitNode, visitArray);
                     if (ts.hasJSDocNodes(child)) {
@@ -21480,52 +17233,31 @@ var ts;
                     checkNodePositions(child, aggressiveChecks);
                     return;
                 }
-                // Otherwise, the node is entirely before the change range.  No need to do anything with it.
                 ts.Debug.assert(fullEnd < changeStart);
             }
             function visitArray(array) {
                 ts.Debug.assert(array.pos <= array.end);
                 if (array.pos > changeRangeOldEnd) {
-                    // Array is entirely after the change range.  We need to move it, and move any of
-                    // its children.
-                    moveElementEntirelyPastChangeRange(array, /*isArray*/ true, delta, oldText, newText, aggressiveChecks);
+                    moveElementEntirelyPastChangeRange(array, true, delta, oldText, newText, aggressiveChecks);
                     return;
                 }
-                // Check if the element intersects the change range.  If it does, then it is not
-                // reusable.  Also, we'll need to recurse to see what constituent portions we may
-                // be able to use.
                 var fullEnd = array.end;
                 if (fullEnd >= changeStart) {
                     array.intersectsChange = true;
                     array._children = undefined;
-                    // Adjust the pos or end (or both) of the intersecting array accordingly.
                     adjustIntersectingElement(array, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta);
-                    for (var _i = 0, array_2 = array; _i < array_2.length; _i++) {
-                        var node = array_2[_i];
+                    for (var _i = 0, array_9 = array; _i < array_9.length; _i++) {
+                        var node = array_9[_i];
                         visitNode(node);
                     }
                     return;
                 }
-                // Otherwise, the array is entirely before the change range.  No need to do anything with it.
                 ts.Debug.assert(fullEnd < changeStart);
             }
         }
         function extendToAffectedRange(sourceFile, changeRange) {
-            // Consider the following code:
-            //      void foo() { /; }
-            //
-            // If the text changes with an insertion of / just before the semicolon then we end up with:
-            //      void foo() { //; }
-            //
-            // If we were to just use the changeRange a is, then we would not rescan the { token
-            // (as it does not intersect the actual original change range).  Because an edit may
-            // change the token touching it, we actually need to look back *at least* one token so
-            // that the prior token sees that change.
             var maxLookahead = 1;
             var start = changeRange.span.start;
-            // the first iteration aligns us with the change start. subsequent iteration move us to
-            // the left by maxLookahead tokens.  We only need to do this as long as we're not at the
-            // start of the tree.
             for (var i = 0; start > 0 && i <= maxLookahead; i++) {
                 var nearestNode = findNearestNodeStartingBeforeOrAtPosition(sourceFile, start);
                 ts.Debug.assert(nearestNode.pos <= start);
@@ -21560,54 +17292,23 @@ var ts;
             }
             function visit(child) {
                 if (ts.nodeIsMissing(child)) {
-                    // Missing nodes are effectively invisible to us.  We never even consider them
-                    // When trying to find the nearest node before us.
                     return;
                 }
-                // If the child intersects this position, then this node is currently the nearest
-                // node that starts before the position.
                 if (child.pos <= position) {
                     if (child.pos >= bestResult.pos) {
-                        // This node starts before the position, and is closer to the position than
-                        // the previous best node we found.  It is now the new best node.
                         bestResult = child;
                     }
-                    // Now, the node may overlap the position, or it may end entirely before the
-                    // position.  If it overlaps with the position, then either it, or one of its
-                    // children must be the nearest node before the position.  So we can just
-                    // recurse into this child to see if we can find something better.
                     if (position < child.end) {
-                        // The nearest node is either this child, or one of the children inside
-                        // of it.  We've already marked this child as the best so far.  Recurse
-                        // in case one of the children is better.
                         forEachChild(child, visit);
-                        // Once we look at the children of this node, then there's no need to
-                        // continue any further.
                         return true;
                     }
                     else {
                         ts.Debug.assert(child.end <= position);
-                        // The child ends entirely before this position.  Say you have the following
-                        // (where $ is the position)
-                        //
-                        //      <complex expr 1> ? <complex expr 2> $ : <...> <...>
-                        //
-                        // We would want to find the nearest preceding node in "complex expr 2".
-                        // To support that, we keep track of this node, and once we're done searching
-                        // for a best node, we recurse down this node to see if we can find a good
-                        // result in it.
-                        //
-                        // This approach allows us to quickly skip over nodes that are entirely
-                        // before the position, while still allowing us to find any nodes in the
-                        // last one that might be what we want.
                         lastNodeEntirelyBeforePosition = child;
                     }
                 }
                 else {
                     ts.Debug.assert(child.pos > position);
-                    // We're now at a node that is entirely past the position we're searching for.
-                    // This node (and all following nodes) could never contribute to the result,
-                    // so just skip them by returning 'true' here.
                     return true;
                 }
             }
@@ -21616,7 +17317,7 @@ var ts;
             var oldText = sourceFile.text;
             if (textChangeRange) {
                 ts.Debug.assert((oldText.length - textChangeRange.span.length + textChangeRange.newLength) === newText.length);
-                if (aggressiveChecks || ts.Debug.shouldAssert(3 /* VeryAggressive */)) {
+                if (aggressiveChecks || ts.Debug.shouldAssert(3)) {
                     var oldTextPrefix = oldText.substr(0, textChangeRange.span.start);
                     var newTextPrefix = newText.substr(0, textChangeRange.span.start);
                     ts.Debug.assert(oldTextPrefix === newTextPrefix);
@@ -21631,68 +17332,42 @@ var ts;
             var currentArrayIndex = 0;
             ts.Debug.assert(currentArrayIndex < currentArray.length);
             var current = currentArray[currentArrayIndex];
-            var lastQueriedPosition = -1 /* Value */;
+            var lastQueriedPosition = -1;
             return {
                 currentNode: function (position) {
-                    // Only compute the current node if the position is different than the last time
-                    // we were asked.  The parser commonly asks for the node at the same position
-                    // twice.  Once to know if can read an appropriate list element at a certain point,
-                    // and then to actually read and consume the node.
                     if (position !== lastQueriedPosition) {
-                        // Much of the time the parser will need the very next node in the array that
-                        // we just returned a node from.So just simply check for that case and move
-                        // forward in the array instead of searching for the node again.
                         if (current && current.end === position && currentArrayIndex < (currentArray.length - 1)) {
                             currentArrayIndex++;
                             current = currentArray[currentArrayIndex];
                         }
-                        // If we don't have a node, or the node we have isn't in the right position,
-                        // then try to find a viable node at the position requested.
                         if (!current || current.pos !== position) {
                             findHighestListElementThatStartsAtPosition(position);
                         }
                     }
-                    // Cache this query so that we don't do any extra work if the parser calls back
-                    // into us.  Note: this is very common as the parser will make pairs of calls like
-                    // 'isListElement -> parseListElement'.  If we were unable to find a node when
-                    // called with 'isListElement', we don't want to redo the work when parseListElement
-                    // is called immediately after.
                     lastQueriedPosition = position;
-                    // Either we don'd have a node, or we have a node at the position being asked for.
                     ts.Debug.assert(!current || current.pos === position);
                     return current;
                 }
             };
-            // Finds the highest element in the tree we can find that starts at the provided position.
-            // The element must be a direct child of some node list in the tree.  This way after we
-            // return it, we can easily return its next sibling in the list.
             function findHighestListElementThatStartsAtPosition(position) {
-                // Clear out any cached state about the last node we found.
                 currentArray = undefined;
-                currentArrayIndex = -1 /* Value */;
+                currentArrayIndex = -1;
                 current = undefined;
-                // Recurse into the source file to find the highest node at this position.
                 forEachChild(sourceFile, visitNode, visitArray);
                 return;
                 function visitNode(node) {
                     if (position >= node.pos && position < node.end) {
-                        // Position was within this node.  Keep searching deeper to find the node.
                         forEachChild(node, visitNode, visitArray);
-                        // don't proceed any further in the search.
                         return true;
                     }
-                    // position wasn't in this node, have to keep searching.
                     return false;
                 }
                 function visitArray(array) {
                     if (position >= array.pos && position < array.end) {
-                        // position was in this array.  Search through this array to see if we find a
-                        // viable element.
                         for (var i = 0; i < array.length; i++) {
                             var child = array[i];
                             if (child) {
                                 if (child.pos === position) {
-                                    // Found the right node.  We're done.
                                     currentArray = array;
                                     currentArrayIndex = i;
                                     current = child;
@@ -21700,8 +17375,6 @@ var ts;
                                 }
                                 else {
                                     if (child.pos < position && position < child.end) {
-                                        // Position in somewhere within this child.  Search in it and
-                                        // stop searching in this array.
                                         forEachChild(child, visitNode, visitArray);
                                         return true;
                                     }
@@ -21709,26 +17382,17 @@ var ts;
                             }
                         }
                     }
-                    // position wasn't in this array, have to keep searching.
                     return false;
                 }
             }
         }
-        var InvalidPosition;
-        (function (InvalidPosition) {
-            InvalidPosition[InvalidPosition["Value"] = -1] = "Value";
-        })(InvalidPosition || (InvalidPosition = {}));
     })(IncrementalParser || (IncrementalParser = {}));
     function isDeclarationFileName(fileName) {
-        return ts.fileExtensionIs(fileName, ".d.ts" /* Dts */);
+        return ts.fileExtensionIs(fileName, ".d.ts");
     }
-    /*@internal*/
     function processCommentPragmas(context, sourceText) {
-        var triviaScanner = ts.createScanner(context.languageVersion, /*skipTrivia*/ false, 0 /* Standard */, sourceText);
+        var triviaScanner = ts.createScanner(context.languageVersion, false, 0, sourceText);
         var pragmas = [];
-        // Keep scanning all the leading trivia in the file until we get to something that
-        // isn't trivia.  Any single line comment will be analyzed to see if it is a
-        // reference comment.
         while (true) {
             var kind = triviaScanner.scan();
             if (!ts.isTrivia(kind)) {
@@ -21745,7 +17409,7 @@ var ts;
         context.pragmas = ts.createMap();
         for (var _i = 0, pragmas_1 = pragmas; _i < pragmas_1.length; _i++) {
             var pragma = pragmas_1[_i];
-            if (context.pragmas.has(pragma.name)) { // TODO: GH#18217
+            if (context.pragmas.has(pragma.name)) {
                 var currentValue = context.pragmas.get(pragma.name);
                 if (currentValue instanceof Array) {
                     currentValue.push(pragma.args);
@@ -21759,7 +17423,6 @@ var ts;
         }
     }
     ts.processCommentPragmas = processCommentPragmas;
-    /*@internal*/
     function processPragmasIntoFields(context, reportDiagnostic) {
         context.checkJsDirective = undefined;
         context.referencedFiles = [];
@@ -21768,15 +17431,12 @@ var ts;
         context.amdDependencies = [];
         context.hasNoDefaultLib = false;
         context.pragmas.forEach(function (entryOrList, key) {
-            // TODO: The below should be strongly type-guarded and not need casts/explicit annotations, since entryOrList is related to
-            // key and key is constrained to a union; but it's not (see GH#21483 for at least partial fix) :(
             switch (key) {
                 case "reference": {
                     var referencedFiles_1 = context.referencedFiles;
                     var typeReferenceDirectives_1 = context.typeReferenceDirectives;
                     var libReferenceDirectives_1 = context.libReferenceDirectives;
                     ts.forEach(ts.toArray(entryOrList), function (arg) {
-                        // TODO: GH#18217
                         if (arg.arguments["no-default-lib"]) {
                             context.hasNoDefaultLib = true;
                         }
@@ -21796,7 +17456,7 @@ var ts;
                     break;
                 }
                 case "amd-dependency": {
-                    context.amdDependencies = ts.map(ts.toArray(entryOrList), function (x) { return ({ name: x.arguments.name, path: x.arguments.path }); }); // TODO: GH#18217
+                    context.amdDependencies = ts.map(ts.toArray(entryOrList), function (x) { return ({ name: x.arguments.name, path: x.arguments.path }); });
                     break;
                 }
                 case "amd-module": {
@@ -21804,7 +17464,6 @@ var ts;
                         for (var _i = 0, entryOrList_1 = entryOrList; _i < entryOrList_1.length; _i++) {
                             var entry = entryOrList_1[_i];
                             if (context.moduleName) {
-                                // TODO: It's probably fine to issue this diagnostic on all instances of the pragma
                                 reportDiagnostic(entry.range.pos, entry.range.end - entry.range.pos, ts.Diagnostics.An_AMD_module_cannot_have_multiple_name_assignments);
                             }
                             context.moduleName = entry.arguments.name;
@@ -21817,9 +17476,8 @@ var ts;
                 }
                 case "ts-nocheck":
                 case "ts-check": {
-                    // _last_ of either nocheck or check in a file is the "winner"
                     ts.forEach(ts.toArray(entryOrList), function (entry) {
-                        if (!context.checkJsDirective || entry.range.pos > context.checkJsDirective.pos) { // TODO: GH#18217
+                        if (!context.checkJsDirective || entry.range.pos > context.checkJsDirective.pos) {
                             context.checkJsDirective = {
                                 enabled: key === "ts-check",
                                 end: entry.range.end,
@@ -21829,8 +17487,8 @@ var ts;
                     });
                     break;
                 }
-                case "jsx": return; // Accessed directly
-                default: ts.Debug.fail("Unhandled pragma kind"); // Can this be made into an assertNever in the future?
+                case "jsx": return;
+                default: ts.Debug.fail("Unhandled pragma kind");
             }
         });
     }
@@ -21847,11 +17505,11 @@ var ts;
     var tripleSlashXMLCommentStartRegEx = /^\/\/\/\s*<(\S+)\s.*?\/>/im;
     var singleLinePragmaRegEx = /^\/\/\/?\s*@(\S+)\s*(.*)\s*$/im;
     function extractPragmas(pragmas, range, text) {
-        var tripleSlash = range.kind === 2 /* SingleLineCommentTrivia */ && tripleSlashXMLCommentStartRegEx.exec(text);
+        var tripleSlash = range.kind === 2 && tripleSlashXMLCommentStartRegEx.exec(text);
         if (tripleSlash) {
-            var name = tripleSlash[1].toLowerCase(); // Technically unsafe cast, but we do it so the below check to make it safe typechecks
+            var name = tripleSlash[1].toLowerCase();
             var pragma = ts.commentPragmas[name];
-            if (!pragma || !(pragma.kind & 1 /* TripleSlashXML */)) {
+            if (!pragma || !(pragma.kind & 1)) {
                 return;
             }
             if (pragma.args) {
@@ -21861,7 +17519,7 @@ var ts;
                     var matcher = getNamedArgRegEx(arg.name);
                     var matchResult = matcher.exec(text);
                     if (!matchResult && !arg.optional) {
-                        return; // Missing required argument, don't parse
+                        return;
                     }
                     else if (matchResult) {
                         if (arg.captureSpan) {
@@ -21884,30 +17542,30 @@ var ts;
             }
             return;
         }
-        var singleLine = range.kind === 2 /* SingleLineCommentTrivia */ && singleLinePragmaRegEx.exec(text);
+        var singleLine = range.kind === 2 && singleLinePragmaRegEx.exec(text);
         if (singleLine) {
-            return addPragmaForMatch(pragmas, range, 2 /* SingleLine */, singleLine);
+            return addPragmaForMatch(pragmas, range, 2, singleLine);
         }
-        if (range.kind === 3 /* MultiLineCommentTrivia */) {
-            var multiLinePragmaRegEx = /\s*@(\S+)\s*(.*)\s*$/gim; // Defined inline since it uses the "g" flag, which keeps a persistent index (for iterating)
+        if (range.kind === 3) {
+            var multiLinePragmaRegEx = /\s*@(\S+)\s*(.*)\s*$/gim;
             var multiLineMatch = void 0;
             while (multiLineMatch = multiLinePragmaRegEx.exec(text)) {
-                addPragmaForMatch(pragmas, range, 4 /* MultiLine */, multiLineMatch);
+                addPragmaForMatch(pragmas, range, 4, multiLineMatch);
             }
         }
     }
     function addPragmaForMatch(pragmas, range, kind, match) {
         if (!match)
             return;
-        var name = match[1].toLowerCase(); // Technically unsafe cast, but we do it so they below check to make it safe typechecks
+        var name = match[1].toLowerCase();
         var pragma = ts.commentPragmas[name];
         if (!pragma || !(pragma.kind & kind)) {
             return;
         }
-        var args = match[2]; // Split on spaces and match up positionally with definition
+        var args = match[2];
         var argument = getNamedPragmaArguments(pragma, args);
         if (argument === "fail")
-            return; // Missing required argument, fail to parse it
+            return;
         pragmas.push({ name: name, args: { arguments: argument, range: range } });
         return;
     }
@@ -21930,20 +17588,16 @@ var ts;
         }
         return argMap;
     }
-    /** @internal */
     function tagNamesAreEquivalent(lhs, rhs) {
         if (lhs.kind !== rhs.kind) {
             return false;
         }
-        if (lhs.kind === 71 /* Identifier */) {
+        if (lhs.kind === 71) {
             return lhs.escapedText === rhs.escapedText;
         }
-        if (lhs.kind === 99 /* ThisKeyword */) {
+        if (lhs.kind === 99) {
             return true;
         }
-        // If we are at this statement then we must have PropertyAccessExpression and because tag name in Jsx element can only
-        // take forms of JsxTagNameExpression which includes an identifier, "this" expression, or another propertyAccessExpression
-        // it is safe to case the expression property as such. See parseJsxElementName for how we parse tag name in Jsx element
         return lhs.name.escapedText === rhs.name.escapedText &&
             tagNamesAreEquivalent(lhs.expression, rhs.expression);
     }
@@ -21951,14 +17605,8 @@ var ts;
 })(ts || (ts = {}));
 var ts;
 (function (ts) {
-    /* @internal */
     ts.compileOnSaveCommandLineOption = { name: "compileOnSave", type: "boolean" };
-    // NOTE: The order here is important to default lib ordering as entries will have the same
-    //       order in the generated program (see `getDefaultLibPriority` in program.ts). This
-    //       order also affects overload resolution when a type declared in one lib is
-    //       augmented in another lib.
     var libEntries = [
-        // JavaScript only
         ["es5", "lib.es5.d.ts"],
         ["es6", "lib.es2015.d.ts"],
         ["es2015", "lib.es2015.d.ts"],
@@ -21967,13 +17615,11 @@ var ts;
         ["es2017", "lib.es2017.d.ts"],
         ["es2018", "lib.es2018.d.ts"],
         ["esnext", "lib.esnext.d.ts"],
-        // Host only
         ["dom", "lib.dom.d.ts"],
         ["dom.iterable", "lib.dom.iterable.d.ts"],
         ["webworker", "lib.webworker.d.ts"],
         ["webworker.importscripts", "lib.webworker.importscripts.d.ts"],
         ["scripthost", "lib.scripthost.d.ts"],
-        // ES2015 Or ESNext By-feature options
         ["es2015.core", "lib.es2015.core.d.ts"],
         ["es2015.collection", "lib.es2015.collection.d.ts"],
         ["es2015.generator", "lib.es2015.generator.d.ts"],
@@ -21996,22 +17642,9 @@ var ts;
         ["esnext.symbol", "lib.esnext.symbol.d.ts"],
         ["esnext.asynciterable", "lib.esnext.asynciterable.d.ts"],
     ];
-    /**
-     * An array of supported "lib" reference file names used to determine the order for inclusion
-     * when referenced, as well as for spelling suggestions. This ensures the correct ordering for
-     * overload resolution when a type declared in one lib is extended by another.
-     */
-    /* @internal */
     ts.libs = libEntries.map(function (entry) { return entry[0]; });
-    /**
-     * A map of lib names to lib files. This map is used both for parsing the "lib" command line
-     * option as well as for resolving lib reference directives.
-     */
-    /* @internal */
     ts.libMap = ts.createMapFromEntries(libEntries);
-    /* @internal */
     ts.optionDeclarations = [
-        // CommandLine only options
         {
             name: "help",
             shortName: "h",
@@ -22087,19 +17720,18 @@ var ts;
             category: ts.Diagnostics.Command_line_Options,
             description: ts.Diagnostics.Watch_input_files,
         },
-        // Basic
         {
             name: "target",
             shortName: "t",
             type: ts.createMapFromTemplate({
-                es3: 0 /* ES3 */,
-                es5: 1 /* ES5 */,
-                es6: 2 /* ES2015 */,
-                es2015: 2 /* ES2015 */,
-                es2016: 3 /* ES2016 */,
-                es2017: 4 /* ES2017 */,
-                es2018: 5 /* ES2018 */,
-                esnext: 6 /* ESNext */,
+                es3: 0,
+                es5: 1,
+                es6: 2,
+                es2015: 2,
+                es2016: 3,
+                es2017: 4,
+                es2018: 5,
+                esnext: 6,
             }),
             paramType: ts.Diagnostics.VERSION,
             showInSimplifiedHelpView: true,
@@ -22151,9 +17783,9 @@ var ts;
         {
             name: "jsx",
             type: ts.createMapFromTemplate({
-                "preserve": 1 /* Preserve */,
-                "react-native": 3 /* ReactNative */,
-                "react": 2 /* React */
+                "preserve": 1,
+                "react-native": 3,
+                "react": 2
             }),
             paramType: ts.Diagnostics.KIND,
             showInSimplifiedHelpView: true,
@@ -22253,7 +17885,6 @@ var ts;
             category: ts.Diagnostics.Basic_Options,
             description: ts.Diagnostics.Transpile_each_file_as_a_separate_module_similar_to_ts_transpileModule
         },
-        // Strict Type Checks
         {
             name: "strict",
             type: "boolean",
@@ -22303,7 +17934,6 @@ var ts;
             category: ts.Diagnostics.Strict_Type_Checking_Options,
             description: ts.Diagnostics.Parse_in_strict_mode_and_emit_use_strict_for_each_source_file
         },
-        // Additional Checks
         {
             name: "noUnusedLocals",
             type: "boolean",
@@ -22332,7 +17962,6 @@ var ts;
             category: ts.Diagnostics.Additional_Checks,
             description: ts.Diagnostics.Report_errors_for_fallthrough_cases_in_switch_statement
         },
-        // Module Resolution
         {
             name: "moduleResolution",
             type: ts.createMapFromTemplate({
@@ -22351,8 +17980,6 @@ var ts;
             description: ts.Diagnostics.Base_directory_to_resolve_non_absolute_module_names
         },
         {
-            // this option can only be specified in tsconfig.json
-            // use type = object to copy the value as-is
             name: "paths",
             type: "object",
             isTSConfigOnly: true,
@@ -22360,8 +17987,6 @@ var ts;
             description: ts.Diagnostics.A_series_of_entries_which_re_map_imports_to_lookup_locations_relative_to_the_baseUrl
         },
         {
-            // this option can only be specified in tsconfig.json
-            // use type = object to copy the value as-is
             name: "rootDirs",
             type: "list",
             isTSConfigOnly: true,
@@ -22414,7 +18039,6 @@ var ts;
             category: ts.Diagnostics.Module_Resolution_Options,
             description: ts.Diagnostics.Do_not_resolve_the_real_path_of_symlinks,
         },
-        // Source Maps
         {
             name: "sourceRoot",
             type: "string",
@@ -22443,7 +18067,6 @@ var ts;
             category: ts.Diagnostics.Source_Map_Options,
             description: ts.Diagnostics.Emit_the_source_alongside_the_sourcemaps_within_a_single_file_requires_inlineSourceMap_or_sourceMap_to_be_set
         },
-        // Experimental
         {
             name: "experimentalDecorators",
             type: "boolean",
@@ -22456,7 +18079,6 @@ var ts;
             category: ts.Diagnostics.Experimental_Options,
             description: ts.Diagnostics.Enables_experimental_support_for_emitting_type_metadata_for_decorators
         },
-        // Advanced
         {
             name: "jsxFactory",
             type: "string",
@@ -22503,7 +18125,6 @@ var ts;
             name: "out",
             type: "string",
             isFilePath: false,
-            // for correct behaviour, please use outFile
             category: ts.Diagnostics.Advanced_Options,
             paramType: ts.Diagnostics.FILE,
             description: ts.Diagnostics.Deprecated_Use_outFile_instead_Concatenate_and_emit_output_to_single_file,
@@ -22541,8 +18162,8 @@ var ts;
         {
             name: "newLine",
             type: ts.createMapFromTemplate({
-                crlf: 0 /* CarriageReturnLineFeed */,
-                lf: 1 /* LineFeed */
+                crlf: 0,
+                lf: 1
             }),
             paramType: ts.Diagnostics.NEWLINE,
             category: ts.Diagnostics.Advanced_Options,
@@ -22665,7 +18286,6 @@ var ts;
             description: ts.Diagnostics.Resolve_keyof_to_string_valued_property_names_only_no_numbers_or_symbols,
         },
         {
-            // A list of plugins to load in the language service
             name: "plugins",
             type: "list",
             isTSConfigOnly: true,
@@ -22676,12 +18296,8 @@ var ts;
             description: ts.Diagnostics.List_of_language_service_plugins
         }
     ];
-    /* @internal */
     ts.typeAcquisitionDeclarations = [
         {
-            /* @deprecated typingOptions.enableAutoDiscovery
-             * Use typeAcquisition.enable instead.
-             */
             name: "enableAutoDiscovery",
             type: "boolean",
         },
@@ -22706,17 +18322,14 @@ var ts;
             }
         }
     ];
-    /* @internal */
     ts.defaultInitCompilerOptions = {
         module: ts.ModuleKind.CommonJS,
-        target: 1 /* ES5 */,
+        target: 1,
         strict: true,
         esModuleInterop: true
     };
     var optionNameMapCache;
-    /* @internal */
     function convertEnableAutoDiscoveryToEnable(typeAcquisition) {
-        // Convert deprecated typingOptions.enableAutoDiscovery to typeAcquisition.enable
         if (typeAcquisition && typeAcquisition.enableAutoDiscovery !== undefined && typeAcquisition.enable === undefined) {
             return {
                 enable: typeAcquisition.enableAutoDiscovery,
@@ -22742,7 +18355,6 @@ var ts;
         optionNameMapCache = { optionNameMap: optionNameMap, shortOptionNames: shortOptionNames };
         return optionNameMapCache;
     }
-    /* @internal */
     function createCompilerDiagnosticForInvalidCustomType(opt) {
         return createDiagnosticForInvalidCustomType(opt, ts.createCompilerDiagnostic);
     }
@@ -22751,12 +18363,10 @@ var ts;
         var namesOfType = ts.arrayFrom(opt.type.keys()).map(function (key) { return "'" + key + "'"; }).join(", ");
         return createDiagnostic(ts.Diagnostics.Argument_for_0_option_must_be_Colon_1, "--" + opt.name, namesOfType);
     }
-    /* @internal */
     function parseCustomTypeOption(opt, value, errors) {
         return convertJsonOptionOfCustomType(opt, trimString(value || ""), errors);
     }
     ts.parseCustomTypeOption = parseCustomTypeOption;
-    /* @internal */
     function parseListTypeOption(opt, value, errors) {
         if (value === void 0) { value = ""; }
         value = trimString(value);
@@ -22794,17 +18404,16 @@ var ts;
             while (i < args.length) {
                 var s = args[i];
                 i++;
-                if (s.charCodeAt(0) === 64 /* at */) {
+                if (s.charCodeAt(0) === 64) {
                     parseResponseFile(s.slice(1));
                 }
-                else if (s.charCodeAt(0) === 45 /* minus */) {
-                    var opt = getOptionFromName(s.slice(s.charCodeAt(1) === 45 /* minus */ ? 2 : 1), /*allowShort*/ true);
+                else if (s.charCodeAt(0) === 45) {
+                    var opt = getOptionFromName(s.slice(s.charCodeAt(1) === 45 ? 2 : 1), true);
                     if (opt) {
                         if (opt.isTSConfigOnly) {
                             errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_can_only_be_specified_in_tsconfig_json_file, opt.name));
                         }
                         else {
-                            // Check to see if no argument was provided (e.g. "--locale" is the last command-line argument).
                             if (!args[i] && opt.type !== "boolean") {
                                 errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_expects_an_argument, opt.name));
                             }
@@ -22814,10 +18423,8 @@ var ts;
                                     i++;
                                     break;
                                 case "boolean":
-                                    // boolean flag has optional value true, false, others
                                     var optValue = args[i];
                                     options[opt.name] = optValue !== "false";
-                                    // consume next argument as boolean flag value
                                     if (optValue === "false" || optValue === "true") {
                                         i++;
                                     }
@@ -22833,7 +18440,6 @@ var ts;
                                         i++;
                                     }
                                     break;
-                                // If not a primitive, the possible types are specified in what is effectively a map of options.
                                 default:
                                     options[opt.name] = parseCustomTypeOption(opt, args[i], errors);
                                     i++;
@@ -22859,14 +18465,14 @@ var ts;
             var args = [];
             var pos = 0;
             while (true) {
-                while (pos < text.length && text.charCodeAt(pos) <= 32 /* space */)
+                while (pos < text.length && text.charCodeAt(pos) <= 32)
                     pos++;
                 if (pos >= text.length)
                     break;
                 var start = pos;
-                if (text.charCodeAt(start) === 34 /* doubleQuote */) {
+                if (text.charCodeAt(start) === 34) {
                     pos++;
-                    while (pos < text.length && text.charCodeAt(pos) !== 34 /* doubleQuote */)
+                    while (pos < text.length && text.charCodeAt(pos) !== 34)
                         pos++;
                     if (pos < text.length) {
                         args.push(text.substring(start + 1, pos));
@@ -22877,7 +18483,7 @@ var ts;
                     }
                 }
                 else {
-                    while (text.charCodeAt(pos) > 32 /* space */)
+                    while (text.charCodeAt(pos) > 32)
                         pos++;
                     args.push(text.substring(start, pos));
                 }
@@ -22886,12 +18492,10 @@ var ts;
         }
     }
     ts.parseCommandLine = parseCommandLine;
-    /** @internal */
     function getOptionFromName(optionName, allowShort) {
         if (allowShort === void 0) { allowShort = false; }
         optionName = optionName.toLowerCase();
         var _a = getOptionNameMap(), optionNameMap = _a.optionNameMap, shortOptionNames = _a.shortOptionNames;
-        // Try to translate short option names to their full equivalents.
         if (allowShort) {
             var short = shortOptionNames.get(optionName);
             if (short !== undefined) {
@@ -22909,25 +18513,20 @@ var ts;
         var diagnostic = ts.createCompilerDiagnostic.apply(undefined, arguments);
         return diagnostic.messageText;
     }
-    /* @internal */
     function printVersion() {
         ts.sys.write(getDiagnosticText(ts.Diagnostics.Version_0, ts.version) + ts.sys.newLine);
     }
     ts.printVersion = printVersion;
-    /* @internal */
     function printHelp(optionsList, syntaxPrefix) {
         if (syntaxPrefix === void 0) { syntaxPrefix = ""; }
         var output = [];
-        // We want to align our "syntax" and "examples" commands to a certain margin.
         var syntaxLength = getDiagnosticText(ts.Diagnostics.Syntax_Colon_0, "").length;
         var examplesLength = getDiagnosticText(ts.Diagnostics.Examples_Colon_0, "").length;
         var marginLength = Math.max(syntaxLength, examplesLength);
-        // Build up the syntactic skeleton.
         var syntax = makePadding(marginLength - syntaxLength);
         syntax += "tsc " + syntaxPrefix + "[" + getDiagnosticText(ts.Diagnostics.options) + "] [" + getDiagnosticText(ts.Diagnostics.file) + "...]";
         output.push(getDiagnosticText(ts.Diagnostics.Syntax_Colon_0, syntax));
         output.push(ts.sys.newLine + ts.sys.newLine);
-        // Build up the list of examples.
         var padding = makePadding(marginLength);
         output.push(getDiagnosticText(ts.Diagnostics.Examples_Colon_0, makePadding(marginLength - examplesLength) + "tsc hello.ts") + ts.sys.newLine);
         output.push(padding + "tsc --outFile file.js file.ts" + ts.sys.newLine);
@@ -22935,16 +18534,12 @@ var ts;
         output.push(padding + "tsc --build tsconfig.json" + ts.sys.newLine);
         output.push(ts.sys.newLine);
         output.push(getDiagnosticText(ts.Diagnostics.Options_Colon) + ts.sys.newLine);
-        // We want our descriptions to align at the same column in our output,
-        // so we keep track of the longest option usage string.
         marginLength = 0;
-        var usageColumn = []; // Things like "-d, --declaration" go in here.
+        var usageColumn = [];
         var descriptionColumn = [];
-        var optionsDescriptionMap = ts.createMap(); // Map between option.description and list of option.type if it is a kind
+        var optionsDescriptionMap = ts.createMap();
         for (var _i = 0, optionsList_1 = optionsList; _i < optionsList_1.length; _i++) {
             var option = optionsList_1[_i];
-            // If an option lacks a description,
-            // it is not officially supported.
             if (!option.description) {
                 continue;
             }
@@ -22968,15 +18563,12 @@ var ts;
                 description = getDiagnosticText(option.description);
             }
             descriptionColumn.push(description);
-            // Set the new margin for the description column if necessary.
             marginLength = Math.max(usageText_1.length, marginLength);
         }
-        // Special case that can't fit in the loop.
         var usageText = " @<" + getDiagnosticText(ts.Diagnostics.file) + ">";
         usageColumn.push(usageText);
         descriptionColumn.push(getDiagnosticText(ts.Diagnostics.Insert_command_line_options_and_files_from_a_file));
         marginLength = Math.max(usageText.length, marginLength);
-        // Print out each row, aligning all the descriptions on the same column.
         for (var i = 0; i < usageColumn.length; i++) {
             var usage = usageColumn[i];
             var description = descriptionColumn[i];
@@ -23007,9 +18599,6 @@ var ts;
         }
     }
     ts.printHelp = printHelp;
-    /**
-     * Reads the config file, reports errors if any and exits if the config file cannot be found
-     */
     function getParsedCommandLineOfConfigFile(configFileName, optionsToExtend, host) {
         var configFileText;
         try {
@@ -23030,20 +18619,11 @@ var ts;
         return parseJsonSourceFileConfigFileContent(result, host, ts.getNormalizedAbsolutePath(ts.getDirectoryPath(configFileName), cwd), optionsToExtend, ts.getNormalizedAbsolutePath(configFileName, cwd));
     }
     ts.getParsedCommandLineOfConfigFile = getParsedCommandLineOfConfigFile;
-    /**
-     * Read tsconfig.json file
-     * @param fileName The path to the config file
-     */
     function readConfigFile(fileName, readFile) {
         var textOrDiagnostic = tryReadFile(fileName, readFile);
         return ts.isString(textOrDiagnostic) ? parseConfigFileTextToJson(fileName, textOrDiagnostic) : { config: {}, error: textOrDiagnostic };
     }
     ts.readConfigFile = readConfigFile;
-    /**
-     * Parse the text of the tsconfig.json file
-     * @param fileName The path to the config file
-     * @param jsonText The text of the config file
-     */
     function parseConfigFileTextToJson(fileName, jsonText) {
         var jsonSourceFile = ts.parseJsonText(fileName, jsonText);
         return {
@@ -23052,10 +18632,6 @@ var ts;
         };
     }
     ts.parseConfigFileTextToJson = parseConfigFileTextToJson;
-    /**
-     * Read tsconfig.json file
-     * @param fileName The path to the config file
-     */
     function readJsonConfigFile(fileName, readFile) {
         var textOrDiagnostic = tryReadFile(fileName, readFile);
         return ts.isString(textOrDiagnostic) ? ts.parseJsonText(fileName, textOrDiagnostic) : { parseDiagnostics: [textOrDiagnostic] };
@@ -23141,19 +18717,10 @@ var ts;
         }
         return _tsconfigRootOptions;
     }
-    /**
-     * Convert the json syntax tree into the json value
-     */
     function convertToObject(sourceFile, errors) {
-        return convertToObjectWorker(sourceFile, errors, /*returnValue*/ true, /*knownRootOptions*/ undefined, /*jsonConversionNotifier*/ undefined);
+        return convertToObjectWorker(sourceFile, errors, true, undefined, undefined);
     }
     ts.convertToObject = convertToObject;
-    /**
-     * Convert the json syntax tree into the json value and report errors
-     * This returns the json value (apart from checking errors) only if returnValue provided is true.
-     * Otherwise it just checks the errors and returns undefined
-     */
-    /*@internal*/
     function convertToObjectWorker(sourceFile, errors, returnValue, knownRootOptions, jsonConversionNotifier) {
         if (!sourceFile.statements.length) {
             return returnValue ? {} : undefined;
@@ -23166,7 +18733,7 @@ var ts;
             var result = returnValue ? {} : undefined;
             for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
                 var element = _a[_i];
-                if (element.kind !== 270 /* PropertyAssignment */) {
+                if (element.kind !== 270) {
                     errors.push(ts.createDiagnosticForNodeInSourceFile(sourceFile, element, ts.Diagnostics.Property_assignment_expected));
                     continue;
                 }
@@ -23186,24 +18753,19 @@ var ts;
                     if (returnValue) {
                         result[keyText] = value;
                     }
-                    // Notify key value set, if user asked for it
                     if (jsonConversionNotifier &&
-                        // Current callbacks are only on known parent option or if we are setting values in the root
                         (parentOption || isRootOptionMap(knownOptions))) {
                         var isValidOptionValue = isCompilerOptionsValue(option, value);
                         if (parentOption) {
                             if (isValidOptionValue) {
-                                // Notify option set in the parent if its a valid option value
                                 jsonConversionNotifier.onSetValidOptionKeyValueInParent(parentOption, option, value);
                             }
                         }
                         else if (isRootOptionMap(knownOptions)) {
                             if (isValidOptionValue) {
-                                // Notify about the valid root key value being set
                                 jsonConversionNotifier.onSetValidOptionKeyValueInRoot(keyText, element.name, value, element.initializer);
                             }
                             else if (!option) {
-                                // Notify about the unknown root key value being set
                                 jsonConversionNotifier.onSetUnknownOptionKeyValueInRoot(keyText, element.name, value, element.initializer);
                             }
                         }
@@ -23217,16 +18779,16 @@ var ts;
         }
         function convertPropertyValueToJson(valueExpression, option) {
             switch (valueExpression.kind) {
-                case 101 /* TrueKeyword */:
+                case 101:
                     reportInvalidOptionValue(option && option.type !== "boolean");
                     return true;
-                case 86 /* FalseKeyword */:
+                case 86:
                     reportInvalidOptionValue(option && option.type !== "boolean");
                     return false;
-                case 95 /* NullKeyword */:
-                    reportInvalidOptionValue(option && option.name === "extends"); // "extends" is the only option we don't allow null/undefined for
-                    return null; // tslint:disable-line:no-null-keyword
-                case 9 /* StringLiteral */:
+                case 95:
+                    reportInvalidOptionValue(option && option.name === "extends");
+                    return null;
+                case 9:
                     if (!isDoubleQuotedString(valueExpression)) {
                         errors.push(ts.createDiagnosticForNodeInSourceFile(sourceFile, valueExpression, ts.Diagnostics.String_literal_with_double_quotes_expected));
                     }
@@ -23234,45 +18796,36 @@ var ts;
                     var text = valueExpression.text;
                     if (option && !ts.isString(option.type)) {
                         var customOption = option;
-                        // Validate custom option type
                         if (!customOption.type.has(text.toLowerCase())) {
                             errors.push(createDiagnosticForInvalidCustomType(customOption, function (message, arg0, arg1) { return ts.createDiagnosticForNodeInSourceFile(sourceFile, valueExpression, message, arg0, arg1); }));
                         }
                     }
                     return text;
-                case 8 /* NumericLiteral */:
+                case 8:
                     reportInvalidOptionValue(option && option.type !== "number");
                     return Number(valueExpression.text);
-                case 198 /* PrefixUnaryExpression */:
-                    if (valueExpression.operator !== 38 /* MinusToken */ || valueExpression.operand.kind !== 8 /* NumericLiteral */) {
-                        break; // not valid JSON syntax
+                case 198:
+                    if (valueExpression.operator !== 38 || valueExpression.operand.kind !== 8) {
+                        break;
                     }
                     reportInvalidOptionValue(option && option.type !== "number");
                     return -Number(valueExpression.operand.text);
-                case 184 /* ObjectLiteralExpression */:
+                case 184:
                     reportInvalidOptionValue(option && option.type !== "object");
                     var objectLiteralExpression = valueExpression;
-                    // Currently having element option declaration in the tsconfig with type "object"
-                    // determines if it needs onSetValidOptionKeyValueInParent callback or not
-                    // At moment there are only "compilerOptions", "typeAcquisition" and "typingOptions"
-                    // that satifies it and need it to modify options set in them (for normalizing file paths)
-                    // vs what we set in the json
-                    // If need arises, we can modify this interface and callbacks as needed
                     if (option) {
                         var _a = option, elementOptions = _a.elementOptions, extraKeyDiagnosticMessage = _a.extraKeyDiagnosticMessage, optionName = _a.name;
                         return convertObjectLiteralExpressionToJson(objectLiteralExpression, elementOptions, extraKeyDiagnosticMessage, optionName);
                     }
                     else {
-                        return convertObjectLiteralExpressionToJson(objectLiteralExpression, /* knownOptions*/ undefined, 
-                        /*extraKeyDiagnosticMessage */ undefined, /*parentOption*/ undefined);
+                        return convertObjectLiteralExpressionToJson(objectLiteralExpression, undefined, undefined, undefined);
                     }
-                case 183 /* ArrayLiteralExpression */:
+                case 183:
                     reportInvalidOptionValue(option && option.type !== "list");
                     return convertArrayLiteralExpressionToJson(valueExpression.elements, option && option.element);
             }
-            // Not in expected format
             if (option) {
-                reportInvalidOptionValue(/*isError*/ true);
+                reportInvalidOptionValue(true);
             }
             else {
                 errors.push(ts.createDiagnosticForNodeInSourceFile(sourceFile, valueExpression, ts.Diagnostics.Property_value_can_only_be_string_literal_numeric_literal_true_false_null_object_literal_or_array_literal));
@@ -23297,7 +18850,7 @@ var ts;
     function isCompilerOptionsValue(option, value) {
         if (option) {
             if (isNullOrUndefined(value))
-                return true; // All options are undefinable/nullable
+                return true;
             if (option.type === "list") {
                 return ts.isArray(value);
             }
@@ -23306,19 +18859,12 @@ var ts;
         }
         return false;
     }
-    /**
-     * Generate tsconfig configuration when running command line "--init"
-     * @param options commandlineOptions to be generated into tsconfig.json
-     * @param fileNames array of filenames to be generated into tsconfig.json
-     */
-    /* @internal */
     function generateTSConfig(options, fileNames, newLine) {
         var compilerOptions = ts.extend(options, ts.defaultInitCompilerOptions);
         var compilerOptionsMap = serializeCompilerOptions(compilerOptions);
         return writeConfigurations();
         function getCustomTypeMapOfCommandLineOption(optionDefinition) {
             if (optionDefinition.type === "string" || optionDefinition.type === "number" || optionDefinition.type === "boolean") {
-                // this is of a type CommandLineOptionOfPrimitiveType
                 return undefined;
             }
             else if (optionDefinition.type === "list") {
@@ -23329,7 +18875,6 @@ var ts;
             }
         }
         function getNameOfCompilerOptionValue(value, customTypeMap) {
-            // There is a typeMap associated with this command-line option so use it to map value back to its name
             return ts.forEachEntry(customTypeMap, function (mapValue, key) {
                 if (mapValue === value) {
                     return key;
@@ -23341,8 +18886,6 @@ var ts;
             var optionsNameMap = getOptionNameMap().optionNameMap;
             var _loop_3 = function (name) {
                 if (ts.hasProperty(options, name)) {
-                    // tsconfig only options cannot be specified via command line,
-                    // so we can assume that only types that can appear here string | number | boolean
                     if (optionsNameMap.has(name) && optionsNameMap.get(name).category === ts.Diagnostics.Command_line_Options) {
                         return "continue";
                     }
@@ -23351,16 +18894,13 @@ var ts;
                     if (optionDefinition) {
                         var customTypeMap_1 = getCustomTypeMapOfCommandLineOption(optionDefinition);
                         if (!customTypeMap_1) {
-                            // There is no map associated with this compiler option then use the value as-is
-                            // This is the case if the value is expect to be string, number, boolean or list of string
                             result.set(name, value);
                         }
                         else {
                             if (optionDefinition.type === "list") {
-                                result.set(name, value.map(function (element) { return getNameOfCompilerOptionValue(element, customTypeMap_1); })); // TODO: GH#18217
+                                result.set(name, value.map(function (element) { return getNameOfCompilerOptionValue(element, customTypeMap_1); }));
                             }
                             else {
-                                // There is a typeMap associated with this command-line option so use it to map value back to its name
                                 result.set(name, getNameOfCompilerOptionValue(value, customTypeMap_1));
                             }
                         }
@@ -23393,14 +18933,11 @@ var ts;
         }
         function isAllowedOption(_a) {
             var category = _a.category, name = _a.name;
-            // Skip options which do not have a category or have category `Command_line_Options`
-            // Exclude all possible `Advanced_Options` in tsconfig.json which were NOT defined in command line
             return category !== undefined
                 && category !== ts.Diagnostics.Command_line_Options
                 && (category !== ts.Diagnostics.Advanced_Options || compilerOptionsMap.has(name));
         }
         function writeConfigurations() {
-            // Filter applicable options to place in the file
             var categorizedOptions = ts.createMultiMap();
             for (var _i = 0, optionDeclarations_1 = ts.optionDeclarations; _i < optionDeclarations_1.length; _i++) {
                 var option = optionDeclarations_1[_i];
@@ -23409,7 +18946,6 @@ var ts;
                     categorizedOptions.add(ts.getLocaleSpecificMessage(category), option);
                 }
             }
-            // Serialize all options and their descriptions
             var marginLength = 0;
             var seenKnownKeys = 0;
             var nameColumn = [];
@@ -23435,12 +18971,10 @@ var ts;
                     marginLength = Math.max(optionName.length, marginLength);
                 }
             });
-            // Write the output
             var tab = makePadding(2);
             var result = [];
             result.push("{");
             result.push(tab + "\"compilerOptions\": {");
-            // Print out each row, aligning all the descriptions on the same column.
             for (var i = 0; i < nameColumn.length; i++) {
                 var optionName = nameColumn[i];
                 var description = descriptionColumn[i];
@@ -23462,29 +18996,14 @@ var ts;
         }
     }
     ts.generateTSConfig = generateTSConfig;
-    /**
-     * Parse the contents of a config file (tsconfig.json).
-     * @param json The contents of the config file to parse
-     * @param host Instance of ParseConfigHost used to enumerate files in folder.
-     * @param basePath A root directory to resolve relative path entries in the config
-     *    file to. e.g. outDir
-     */
     function parseJsonConfigFileContent(json, host, basePath, existingOptions, configFileName, resolutionStack, extraFileExtensions) {
-        return parseJsonConfigFileContentWorker(json, /*sourceFile*/ undefined, host, basePath, existingOptions, configFileName, resolutionStack, extraFileExtensions);
+        return parseJsonConfigFileContentWorker(json, undefined, host, basePath, existingOptions, configFileName, resolutionStack, extraFileExtensions);
     }
     ts.parseJsonConfigFileContent = parseJsonConfigFileContent;
-    /**
-     * Parse the contents of a config file (tsconfig.json).
-     * @param jsonNode The contents of the config file to parse
-     * @param host Instance of ParseConfigHost used to enumerate files in folder.
-     * @param basePath A root directory to resolve relative path entries in the config
-     *    file to. e.g. outDir
-     */
     function parseJsonSourceFileConfigFileContent(sourceFile, host, basePath, existingOptions, configFileName, resolutionStack, extraFileExtensions) {
-        return parseJsonConfigFileContentWorker(/*json*/ undefined, sourceFile, host, basePath, existingOptions, configFileName, resolutionStack, extraFileExtensions);
+        return parseJsonConfigFileContentWorker(undefined, sourceFile, host, basePath, existingOptions, configFileName, resolutionStack, extraFileExtensions);
     }
     ts.parseJsonSourceFileConfigFileContent = parseJsonSourceFileConfigFileContent;
-    /*@internal*/
     function setConfigFileInOptions(options, configFile) {
         if (configFile) {
             Object.defineProperty(options, "configFile", { enumerable: false, writable: false, value: configFile });
@@ -23492,23 +19011,11 @@ var ts;
     }
     ts.setConfigFileInOptions = setConfigFileInOptions;
     function isNullOrUndefined(x) {
-        // tslint:disable-next-line:no-null-keyword
         return x === undefined || x === null;
     }
     function directoryOfCombinedPath(fileName, basePath) {
-        // Use the `getNormalizedAbsolutePath` function to avoid canonicalizing the path, as it must remain noncanonical
-        // until consistient casing errors are reported
         return ts.getDirectoryPath(ts.getNormalizedAbsolutePath(fileName, basePath));
     }
-    /**
-     * Parse the contents of a config file from json or json source file (tsconfig.json).
-     * @param json The contents of the config file to parse
-     * @param sourceFile sourceFile corresponding to the Json
-     * @param host Instance of ParseConfigHost used to enumerate files in folder.
-     * @param basePath A root directory to resolve relative path entries in the config
-     *    file to. e.g. outDir
-     * @param resolutionStack Only present for backwards-compatibility. Should be empty.
-     */
     function parseJsonConfigFileContentWorker(json, sourceFile, host, basePath, existingOptions, configFileName, resolutionStack, extraFileExtensions) {
         if (existingOptions === void 0) { existingOptions = {}; }
         if (resolutionStack === void 0) { resolutionStack = []; }
@@ -23608,12 +19115,10 @@ var ts;
             }
         }
     }
-    /*@internal*/
     function isErrorNoInputFiles(error) {
         return error.code === ts.Diagnostics.No_inputs_were_found_in_config_file_0_Specified_include_paths_were_1_and_exclude_paths_were_2.code;
     }
     ts.isErrorNoInputFiles = isErrorNoInputFiles;
-    /*@internal*/
     function getErrorForNoInputFiles(_a, configFileName) {
         var includeSpecs = _a.includeSpecs, excludeSpecs = _a.excludeSpecs;
         return ts.createCompilerDiagnostic(ts.Diagnostics.No_inputs_were_found_in_config_file_0_Specified_include_paths_were_1_and_exclude_paths_were_2, configFileName || "tsconfig.json", JSON.stringify(includeSpecs || []), JSON.stringify(excludeSpecs || []));
@@ -23622,10 +19127,6 @@ var ts;
     function isSuccessfulParsedTsconfig(value) {
         return !!value.options;
     }
-    /**
-     * This *just* extracts options/include/exclude/files out of a config file.
-     * It does *not* resolve the included files.
-     */
     function parseConfig(json, sourceFile, host, basePath, configFileName, resolutionStack, errors) {
         basePath = ts.normalizeSlashes(basePath);
         var resolvedPath = ts.getNormalizedAbsolutePath(configFileName || "", basePath);
@@ -23637,7 +19138,6 @@ var ts;
             parseOwnConfigOfJson(json, host, basePath, configFileName, errors) :
             parseOwnConfigOfJsonSourceFile(sourceFile, host, basePath, configFileName, errors);
         if (ownConfig.extendedConfigPath) {
-            // copy the resolution stack so it is never reused between branches in potential diamond-problem scenarios.
             resolutionStack = resolutionStack.concat([resolvedPath]);
             var extendedConfig = getExtendedConfig(sourceFile, ownConfig.extendedConfigPath, host, basePath, resolutionStack, errors);
             if (extendedConfig && isSuccessfulParsedTsconfig(extendedConfig)) {
@@ -23656,7 +19156,6 @@ var ts;
                     raw_1.compileOnSave = baseRaw_1.compileOnSave;
                 }
                 ownConfig.options = ts.assign({}, extendedConfig.options, ownConfig.options);
-                // TODO extend type typeAcquisition
             }
         }
         return ownConfig;
@@ -23666,8 +19165,6 @@ var ts;
             errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unknown_option_excludes_Did_you_mean_exclude));
         }
         var options = convertCompilerOptionsFromJsonWorker(json.compilerOptions, basePath, errors, configFileName);
-        // typingOptions has been deprecated and is only supported for backward compatibility purposes.
-        // It should be removed in future releases - use typeAcquisition instead.
         var typeAcquisition = convertTypeAcquisitionFromJsonWorker(json.typeAcquisition || json.typingOptions, basePath, errors, configFileName);
         json.compileOnSave = convertCompileOnSaveOptionFromJson(json, basePath, errors);
         var extendedConfigPath;
@@ -23717,7 +19214,7 @@ var ts;
                 }
             }
         };
-        var json = convertToObjectWorker(sourceFile, errors, /*returnValue*/ true, getTsconfigRootOptionsMap(), optionsIterator);
+        var json = convertToObjectWorker(sourceFile, errors, true, getTsconfigRootOptionsMap(), optionsIterator);
         if (!typeAcquisition) {
             if (typingOptionstypeAcquisition) {
                 typeAcquisition = (typingOptionstypeAcquisition.enableAutoDiscovery !== undefined) ?
@@ -23736,13 +19233,12 @@ var ts;
     }
     function getExtendsConfigPath(extendedConfig, host, basePath, errors, createDiagnostic) {
         extendedConfig = ts.normalizeSlashes(extendedConfig);
-        // If the path isn't a rooted or relative path, don't try to resolve it (we reserve the right to special case module-id like paths in the future)
         if (!(ts.isRootedDiskPath(extendedConfig) || ts.startsWith(extendedConfig, "./") || ts.startsWith(extendedConfig, "../"))) {
             errors.push(createDiagnostic(ts.Diagnostics.A_path_in_an_extends_option_must_be_relative_or_rooted_but_0_is_not, extendedConfig));
             return undefined;
         }
         var extendedConfigPath = ts.getNormalizedAbsolutePath(extendedConfig, basePath);
-        if (!host.fileExists(extendedConfigPath) && !ts.endsWith(extendedConfigPath, ".json" /* Json */)) {
+        if (!host.fileExists(extendedConfigPath) && !ts.endsWith(extendedConfigPath, ".json")) {
             extendedConfigPath = extendedConfigPath + ".json";
             if (!host.fileExists(extendedConfigPath)) {
                 errors.push(createDiagnostic(ts.Diagnostics.File_0_does_not_exist, extendedConfig));
@@ -23762,12 +19258,11 @@ var ts;
             return undefined;
         }
         var extendedDirname = ts.getDirectoryPath(extendedConfigPath);
-        var extendedConfig = parseConfig(/*json*/ undefined, extendedResult, host, extendedDirname, ts.getBaseFileName(extendedConfigPath), resolutionStack, errors);
+        var extendedConfig = parseConfig(undefined, extendedResult, host, extendedDirname, ts.getBaseFileName(extendedConfigPath), resolutionStack, errors);
         if (sourceFile) {
             (_a = sourceFile.extendedSourceFiles).push.apply(_a, extendedResult.extendedSourceFiles);
         }
         if (isSuccessfulParsedTsconfig(extendedConfig)) {
-            // Update the paths to reflect base path
             var relativeDifference_1 = ts.convertToRelativePath(extendedDirname, basePath, ts.identity);
             var updatePath_1 = function (path) { return ts.isRootedDiskPath(path) ? path : ts.combinePaths(relativeDifference_1, path); };
             var mapPropertiesInRawIfNotUndefined = function (propertyName) {
@@ -23896,118 +19391,31 @@ var ts;
     function trimString(s) {
         return typeof s.trim === "function" ? s.trim() : s.replace(/^[\s]+|[\s]+$/g, "");
     }
-    /**
-     * Tests for a path that ends in a recursive directory wildcard.
-     * Matches **, \**, **\, and \**\, but not a**b.
-     *
-     * NOTE: used \ in place of / above to avoid issues with multiline comments.
-     *
-     * Breakdown:
-     *  (^|\/)      # matches either the beginning of the string or a directory separator.
-     *  \*\*        # matches the recursive directory wildcard "**".
-     *  \/?$        # matches an optional trailing directory separator at the end of the string.
-     */
     var invalidTrailingRecursionPattern = /(^|\/)\*\*\/?$/;
-    /**
-     * Tests for a path where .. appears after a recursive directory wildcard.
-     * Matches **\..\*, **\a\..\*, and **\.., but not ..\**\*
-     *
-     * NOTE: used \ in place of / above to avoid issues with multiline comments.
-     *
-     * Breakdown:
-     *  (^|\/)      # matches either the beginning of the string or a directory separator.
-     *  \*\*\/      # matches a recursive directory wildcard "**" followed by a directory separator.
-     *  (.*\/)?     # optionally matches any number of characters followed by a directory separator.
-     *  \.\.        # matches a parent directory path component ".."
-     *  ($|\/)      # matches either the end of the string or a directory separator.
-     */
     var invalidDotDotAfterRecursiveWildcardPattern = /(^|\/)\*\*\/(.*\/)?\.\.($|\/)/;
-    /**
-     * Tests for a path containing a wildcard character in a directory component of the path.
-     * Matches \*\, \?\, and \a*b\, but not \a\ or \a\*.
-     *
-     * NOTE: used \ in place of / above to avoid issues with multiline comments.
-     *
-     * Breakdown:
-     *  \/          # matches a directory separator.
-     *  [^/]*?      # matches any number of characters excluding directory separators (non-greedy).
-     *  [*?]        # matches either a wildcard character (* or ?)
-     *  [^/]*       # matches any number of characters excluding directory separators (greedy).
-     *  \/          # matches a directory separator.
-     */
     var watchRecursivePattern = /\/[^/]*?[*?][^/]*\//;
-    /**
-     * Matches the portion of a wildcard path that does not contain wildcards.
-     * Matches \a of \a\*, or \a\b\c of \a\b\c\?\d.
-     *
-     * NOTE: used \ in place of / above to avoid issues with multiline comments.
-     *
-     * Breakdown:
-     *  ^                   # matches the beginning of the string
-     *  [^*?]*              # matches any number of non-wildcard characters
-     *  (?=\/[^/]*[*?])     # lookahead that matches a directory separator followed by
-     *                      # a path component that contains at least one wildcard character (* or ?).
-     */
     var wildcardDirectoryPattern = /^[^*?]*(?=\/[^/]*[*?])/;
-    /**
-     * Expands an array of file specifications.
-     *
-     * @param filesSpecs The literal file names to include.
-     * @param includeSpecs The wildcard file specifications to include.
-     * @param excludeSpecs The wildcard file specifications to exclude.
-     * @param basePath The base path for any relative file specifications.
-     * @param options Compiler options.
-     * @param host The host used to resolve files and directories.
-     * @param errors An array for diagnostic reporting.
-     */
     function matchFileNames(filesSpecs, includeSpecs, excludeSpecs, basePath, options, host, errors, extraFileExtensions, jsonSourceFile) {
         basePath = ts.normalizePath(basePath);
         var validatedIncludeSpecs, validatedExcludeSpecs;
-        // The exclude spec list is converted into a regular expression, which allows us to quickly
-        // test whether a file or directory should be excluded before recursively traversing the
-        // file system.
         if (includeSpecs) {
-            validatedIncludeSpecs = validateSpecs(includeSpecs, errors, /*allowTrailingRecursion*/ false, jsonSourceFile, "include");
+            validatedIncludeSpecs = validateSpecs(includeSpecs, errors, false, jsonSourceFile, "include");
         }
         if (excludeSpecs) {
-            validatedExcludeSpecs = validateSpecs(excludeSpecs, errors, /*allowTrailingRecursion*/ true, jsonSourceFile, "exclude");
+            validatedExcludeSpecs = validateSpecs(excludeSpecs, errors, true, jsonSourceFile, "exclude");
         }
-        // Wildcard directories (provided as part of a wildcard path) are stored in a
-        // file map that marks whether it was a regular wildcard match (with a `*` or `?` token),
-        // or a recursive directory. This information is used by filesystem watchers to monitor for
-        // new entries in these paths.
         var wildcardDirectories = getWildcardDirectories(validatedIncludeSpecs, validatedExcludeSpecs, basePath, host.useCaseSensitiveFileNames);
         var spec = { filesSpecs: filesSpecs, referencesSpecs: undefined, includeSpecs: includeSpecs, excludeSpecs: excludeSpecs, validatedIncludeSpecs: validatedIncludeSpecs, validatedExcludeSpecs: validatedExcludeSpecs, wildcardDirectories: wildcardDirectories };
         return getFileNamesFromConfigSpecs(spec, basePath, options, host, extraFileExtensions);
     }
-    /**
-     * Gets the file names from the provided config file specs that contain, files, include, exclude and
-     * other properties needed to resolve the file names
-     * @param spec The config file specs extracted with file names to include, wildcards to include/exclude and other details
-     * @param basePath The base path for any relative file specifications.
-     * @param options Compiler options.
-     * @param host The host used to resolve files and directories.
-     * @param extraFileExtensions optionaly file extra file extension information from host
-     */
-    /* @internal */
     function getFileNamesFromConfigSpecs(spec, basePath, options, host, extraFileExtensions) {
         if (extraFileExtensions === void 0) { extraFileExtensions = []; }
         basePath = ts.normalizePath(basePath);
         var keyMapper = host.useCaseSensitiveFileNames ? ts.identity : ts.toLowerCase;
-        // Literal file names (provided via the "files" array in tsconfig.json) are stored in a
-        // file map with a possibly case insensitive key. We use this map later when when including
-        // wildcard paths.
         var literalFileMap = ts.createMap();
-        // Wildcard paths (provided via the "includes" array in tsconfig.json) are stored in a
-        // file map with a possibly case insensitive key. We use this map to store paths matched
-        // via wildcard, and to handle extension priority.
         var wildcardFileMap = ts.createMap();
         var filesSpecs = spec.filesSpecs, validatedIncludeSpecs = spec.validatedIncludeSpecs, validatedExcludeSpecs = spec.validatedExcludeSpecs, wildcardDirectories = spec.wildcardDirectories;
-        // Rather than requery this for each file and filespec, we query the supported extensions
-        // once and store it on the expansion context.
         var supportedExtensions = ts.getSupportedExtensions(options, extraFileExtensions);
-        // Literal files are always included verbatim. An "include" or "exclude" specification cannot
-        // remove a literal file.
         if (filesSpecs) {
             for (var _i = 0, filesSpecs_1 = filesSpecs; _i < filesSpecs_1.length; _i++) {
                 var fileName = filesSpecs_1[_i];
@@ -24016,21 +19424,11 @@ var ts;
             }
         }
         if (validatedIncludeSpecs && validatedIncludeSpecs.length > 0) {
-            for (var _a = 0, _b = host.readDirectory(basePath, supportedExtensions, validatedExcludeSpecs, validatedIncludeSpecs, /*depth*/ undefined); _a < _b.length; _a++) {
+            for (var _a = 0, _b = host.readDirectory(basePath, supportedExtensions, validatedExcludeSpecs, validatedIncludeSpecs, undefined); _a < _b.length; _a++) {
                 var file = _b[_a];
-                // If we have already included a literal or wildcard path with a
-                // higher priority extension, we should skip this file.
-                //
-                // This handles cases where we may encounter both <file>.ts and
-                // <file>.d.ts (or <file>.js if "allowJs" is enabled) in the same
-                // directory when they are compilation outputs.
                 if (hasFileWithHigherPriorityExtension(file, literalFileMap, wildcardFileMap, supportedExtensions, keyMapper)) {
                     continue;
                 }
-                // We may have included a wildcard path with a lower priority
-                // extension due to the user-defined order of entries in the
-                // "include" array. If there is a lower priority extension in the
-                // same directory, we should remove it.
                 removeWildcardFilesWithLowerPriorityExtension(file, wildcardFileMap, supportedExtensions, keyMapper);
                 var key = keyMapper(file);
                 if (!literalFileMap.has(key) && !wildcardFileMap.has(key)) {
@@ -24074,22 +19472,7 @@ var ts;
             return ts.Diagnostics.File_specification_cannot_contain_a_parent_directory_that_appears_after_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0;
         }
     }
-    /**
-     * Gets directories in a set of include patterns that should be watched for changes.
-     */
     function getWildcardDirectories(include, exclude, path, useCaseSensitiveFileNames) {
-        // We watch a directory recursively if it contains a wildcard anywhere in a directory segment
-        // of the pattern:
-        //
-        //  /a/b/**/d   - Watch /a/b recursively to catch changes to any d in any subfolder recursively
-        //  /a/b/*/d    - Watch /a/b recursively to catch any d in any immediate subfolder, even if a new subfolder is added
-        //  /a/b        - Watch /a/b recursively to catch changes to anything in any recursive subfoler
-        //
-        // We watch a directory without recursion if it contains a wildcard in the file segment of
-        // the pattern:
-        //
-        //  /a/b/*      - Watch /a/b directly to catch any new file
-        //  /a/b/a?z    - Watch /a/b directly to catch any new file matching a?z
         var rawExcludeRegex = ts.getRegularExpressionForWildcard(exclude, path, "exclude");
         var excludeRegex = rawExcludeRegex && new RegExp(rawExcludeRegex, useCaseSensitiveFileNames ? "" : "i");
         var wildcardDirectories = {};
@@ -24107,13 +19490,12 @@ var ts;
                     var existingFlags = wildcardDirectories[key];
                     if (existingFlags === undefined || existingFlags < flags) {
                         wildcardDirectories[key] = flags;
-                        if (flags === 1 /* Recursive */) {
+                        if (flags === 1) {
                             recursiveKeys.push(key);
                         }
                     }
                 }
             }
-            // Remove any subpaths under an existing recursively watched directory.
             for (var key in wildcardDirectories) {
                 if (ts.hasProperty(wildcardDirectories, key)) {
                     for (var _a = 0, recursiveKeys_1 = recursiveKeys; _a < recursiveKeys_1.length; _a++) {
@@ -24132,26 +19514,18 @@ var ts;
         if (match) {
             return {
                 key: useCaseSensitiveFileNames ? match[0] : match[0].toLowerCase(),
-                flags: watchRecursivePattern.test(spec) ? 1 /* Recursive */ : 0 /* None */
+                flags: watchRecursivePattern.test(spec) ? 1 : 0
             };
         }
         if (ts.isImplicitGlob(spec)) {
-            return { key: spec, flags: 1 /* Recursive */ };
+            return { key: spec, flags: 1 };
         }
         return undefined;
     }
-    /**
-     * Determines whether a literal or wildcard file has already been included that has a higher
-     * extension priority.
-     *
-     * @param file The path to the file.
-     * @param extensionPriority The priority of the extension.
-     * @param context The expansion context.
-     */
     function hasFileWithHigherPriorityExtension(file, literalFiles, wildcardFiles, extensions, keyMapper) {
         var extensionPriority = ts.getExtensionPriority(file, extensions);
         var adjustedExtensionPriority = ts.adjustExtensionPriority(extensionPriority, extensions);
-        for (var i = 0 /* Highest */; i < adjustedExtensionPriority; i++) {
+        for (var i = 0; i < adjustedExtensionPriority; i++) {
             var higherPriorityExtension = extensions[i];
             var higherPriorityPath = keyMapper(ts.changeExtension(file, higherPriorityExtension));
             if (literalFiles.has(higherPriorityPath) || wildcardFiles.has(higherPriorityPath)) {
@@ -24160,14 +19534,6 @@ var ts;
         }
         return false;
     }
-    /**
-     * Removes files included via wildcard expansion with a lower extension priority that have
-     * already been included.
-     *
-     * @param file The path to the file.
-     * @param extensionPriority The priority of the extension.
-     * @param context The expansion context.
-     */
     function removeWildcardFilesWithLowerPriorityExtension(file, wildcardFiles, extensions, keyMapper) {
         var extensionPriority = ts.getExtensionPriority(file, extensions);
         var nextExtensionPriority = ts.getNextLowestExtensionPriority(extensionPriority, extensions);
@@ -24177,17 +19543,12 @@ var ts;
             wildcardFiles.delete(lowerPriorityPath);
         }
     }
-    /**
-     * Produces a cleaned version of compiler options with personally identifiying info (aka, paths) removed.
-     * Also converts enum values back to strings.
-     */
-    /* @internal */
     function convertCompilerOptionsForTelemetry(opts) {
         var out = {};
         for (var key in opts) {
             if (opts.hasOwnProperty(key)) {
                 var type = getOptionFromName(key);
-                if (type !== undefined) { // Ignore unknown options
+                if (type !== undefined) {
                     out[key] = getOptionValueWithEmptyStrings(opts[key], type);
                 }
             }
@@ -24197,11 +19558,11 @@ var ts;
     ts.convertCompilerOptionsForTelemetry = convertCompilerOptionsForTelemetry;
     function getOptionValueWithEmptyStrings(value, option) {
         switch (option.type) {
-            case "object": // "paths". Can't get any useful information from the value since we blank out strings, so just return "".
+            case "object":
                 return "";
-            case "string": // Could be any arbitrary string -- use empty string instead.
+            case "string":
                 return "";
-            case "number": // Allow numbers, but be sure to check it's actually a number.
+            case "number":
                 return typeof value === "number" ? value : "";
             case "boolean":
                 return typeof value === "boolean" ? value : "";
@@ -24213,7 +19574,7 @@ var ts;
                     if (optionEnumValue === value) {
                         return optionStringValue;
                     }
-                }); // TODO: GH#18217
+                });
         }
     }
 })(ts || (ts = {}));
@@ -24223,7 +19584,6 @@ var ts;
         host.trace(ts.formatMessage.apply(undefined, arguments));
     }
     ts.trace = trace;
-    /* @internal */
     function isTraceEnabled(compilerOptions, host) {
         return !!compilerOptions.traceResolution && host.trace !== undefined;
     }
@@ -24232,20 +19592,15 @@ var ts;
         return r && { path: r.path, extension: r.ext, packageId: packageId };
     }
     function noPackageId(r) {
-        return withPackageId(/*packageId*/ undefined, r);
+        return withPackageId(undefined, r);
     }
-    /**
-     * Kinds of file that we are currently looking for.
-     * Typically there is one pass with Extensions.TypeScript, then a second pass with Extensions.JavaScript.
-     */
     var Extensions;
     (function (Extensions) {
         Extensions[Extensions["TypeScript"] = 0] = "TypeScript";
         Extensions[Extensions["JavaScript"] = 1] = "JavaScript";
         Extensions[Extensions["Json"] = 2] = "Json";
-        Extensions[Extensions["DtsOnly"] = 3] = "DtsOnly"; /** Only '.d.ts' */
+        Extensions[Extensions["DtsOnly"] = 3] = "DtsOnly";
     })(Extensions || (Extensions = {}));
-    /** Used with `Extensions.DtsOnly` to extract the path from TypeScript results. */
     function resolvedTypeScriptOnly(resolved) {
         if (!resolved) {
             return undefined;
@@ -24259,7 +19614,6 @@ var ts;
             failedLookupLocations: failedLookupLocations
         };
     }
-    /** Reads from "main" or "types"/"typings" depending on `extensions`. */
     function tryReadPackageJsonFields(readTypes, jsonContent, baseDirectory, state) {
         return readTypes ? tryReadFromField("typings") || tryReadFromField("types") : tryReadFromField("main");
         function tryReadFromField(fieldName) {
@@ -24283,7 +19637,6 @@ var ts;
             return path;
         }
     }
-    /* @internal */
     function readJson(path, host) {
         try {
             var jsonText = host.readFile(path);
@@ -24296,7 +19649,6 @@ var ts;
             return result.config;
         }
         catch (e) {
-            // gracefully handle if readFile fails or returns not JSON
             return {};
         }
     }
@@ -24317,14 +19669,9 @@ var ts;
         }
     }
     ts.getEffectiveTypeRoots = getEffectiveTypeRoots;
-    /**
-     * Returns the path to every node_modules/@types directory from some ancestor directory.
-     * Returns undefined if there are none.
-     */
     function getDefaultTypeRoots(currentDirectory, host) {
         if (!host.directoryExists) {
             return [ts.combinePaths(currentDirectory, nodeModulesAtTypes)];
-            // And if it doesn't exist, tough.
         }
         var typeRoots;
         ts.forEachAncestorDirectory(ts.normalizePath(currentDirectory), function (directory) {
@@ -24337,11 +19684,6 @@ var ts;
         return typeRoots;
     }
     var nodeModulesAtTypes = ts.combinePaths("node_modules", "@types");
-    /**
-     * @param {string | undefined} containingFile - file that contains type reference directive, can be undefined if containing file is unknown.
-     * This is possible in case if resolution is performed for directives specified via 'types' parameter. In this case initial path for secondary lookups
-     * is assumed to be the same as root directory of the project.
-     */
     function resolveTypeReferenceDirective(typeReferenceDirectiveName, containingFile, options, host) {
         var traceEnabled = isTraceEnabled(options, host);
         var moduleResolutionState = { compilerOptions: options, host: host, traceEnabled: traceEnabled };
@@ -24383,7 +19725,6 @@ var ts;
         }
         return { resolvedTypeReferenceDirective: resolvedTypeReferenceDirective, failedLookupLocations: failedLookupLocations };
         function primaryLookup() {
-            // Check primary library paths
             if (typeRoots && typeRoots.length) {
                 if (traceEnabled) {
                     trace(host, ts.Diagnostics.Resolving_with_primary_search_path_0, typeRoots.join(", "));
@@ -24407,11 +19748,10 @@ var ts;
         function secondaryLookup() {
             var initialLocationForSecondaryLookup = containingFile && ts.getDirectoryPath(containingFile);
             if (initialLocationForSecondaryLookup !== undefined) {
-                // check secondary locations
                 if (traceEnabled) {
                     trace(host, ts.Diagnostics.Looking_up_in_node_modules_folder_initial_location_0, initialLocationForSecondaryLookup);
                 }
-                var result = loadModuleFromNodeModules(Extensions.DtsOnly, typeReferenceDirectiveName, initialLocationForSecondaryLookup, failedLookupLocations, moduleResolutionState, /*cache*/ undefined);
+                var result = loadModuleFromNodeModules(Extensions.DtsOnly, typeReferenceDirectiveName, initialLocationForSecondaryLookup, failedLookupLocations, moduleResolutionState, undefined);
                 var resolvedFile = resolvedTypeScriptOnly(result && result.value);
                 if (!resolvedFile && traceEnabled) {
                     trace(host, ts.Diagnostics.Type_reference_directive_0_was_not_resolved, typeReferenceDirectiveName);
@@ -24426,20 +19766,10 @@ var ts;
         }
     }
     ts.resolveTypeReferenceDirective = resolveTypeReferenceDirective;
-    /**
-     * Given a set of options, returns the set of type directive names
-     *   that should be included for this program automatically.
-     * This list could either come from the config file,
-     *   or from enumerating the types root + initial secondary types lookup location.
-     * More type directives might appear in the program later as a result of loading actual source files;
-     *   this list is only the set of defaults that are implicitly included.
-     */
     function getAutomaticTypeDirectiveNames(options, host) {
-        // Use explicit type list from tsconfig.json
         if (options.types) {
             return options.types;
         }
-        // Walk the primary type lookup locations
         var result = [];
         if (host.directoryExists && host.getDirectories) {
             var typeRoots = getEffectiveTypeRoots(options, host);
@@ -24451,12 +19781,8 @@ var ts;
                             var typeDirectivePath = _b[_a];
                             var normalized = ts.normalizePath(typeDirectivePath);
                             var packageJsonPath = pathToPackageJson(ts.combinePaths(root, normalized));
-                            // `types-publisher` sometimes creates packages with `"typings": null` for packages that don't provide their own types.
-                            // See `createNotNeededPackageJSON` in the types-publisher` repo.
-                            // tslint:disable-next-line:no-null-keyword
                             var isNotNeededPackage = host.fileExists(packageJsonPath) && readJson(packageJsonPath, host).typings === null;
                             if (!isNotNeededPackage) {
-                                // Return just the type directive names
                                 result.push(ts.getBaseFileName(normalized));
                             }
                         }
@@ -24471,7 +19797,6 @@ var ts;
         return createModuleResolutionCacheWithMaps(ts.createMap(), ts.createMap(), currentDirectory, getCanonicalFileName);
     }
     ts.createModuleResolutionCache = createModuleResolutionCache;
-    /*@internal*/
     function createModuleResolutionCacheWithMaps(directoryToModuleNameMap, moduleNameToDirectoryMap, currentDirectory, getCanonicalFileName) {
         return { getOrCreateCacheForDirectory: getOrCreateCacheForDirectory, getOrCreateCacheForModuleName: getOrCreateCacheForModuleName };
         function getOrCreateCacheForDirectory(directoryName) {
@@ -24485,7 +19810,7 @@ var ts;
         }
         function getOrCreateCacheForModuleName(nonRelativeModuleName) {
             if (ts.isExternalModuleNameRelative(nonRelativeModuleName)) {
-                return undefined; // TODO: GH#18217
+                return undefined;
             }
             var perModuleNameCache = moduleNameToDirectoryMap.get(nonRelativeModuleName);
             if (!perModuleNameCache) {
@@ -24500,29 +19825,13 @@ var ts;
             function get(directory) {
                 return directoryPathMap.get(ts.toPath(directory, currentDirectory, getCanonicalFileName));
             }
-            /**
-             * At first this function add entry directory -> module resolution result to the table.
-             * Then it computes the set of parent folders for 'directory' that should have the same module resolution result
-             * and for every parent folder in set it adds entry: parent -> module resolution. .
-             * Lets say we first directory name: /a/b/c/d/e and resolution result is: /a/b/bar.ts.
-             * Set of parent folders that should have the same result will be:
-             * [
-             *     /a/b/c/d, /a/b/c, /a/b
-             * ]
-             * this means that request for module resolution from file in any of these folder will be immediately found in cache.
-             */
             function set(directory, result) {
                 var path = ts.toPath(directory, currentDirectory, getCanonicalFileName);
-                // if entry is already in cache do nothing
                 if (directoryPathMap.has(path)) {
                     return;
                 }
                 directoryPathMap.set(path, result);
                 var resolvedFileName = result.resolvedModule && result.resolvedModule.resolvedFileName;
-                // find common prefix between directory and resolved file name
-                // this common prefix should be the shorted path that has the same resolution
-                // directory: /a/b/c/d/e
-                // resolvedFileName: /a/b/foo.d.ts
                 var commonPrefix = getCommonPrefix(path, resolvedFileName);
                 var current = path;
                 while (true) {
@@ -24542,12 +19851,10 @@ var ts;
                     return undefined;
                 }
                 var resolutionDirectory = ts.toPath(ts.getDirectoryPath(resolution), currentDirectory, getCanonicalFileName);
-                // find first position where directory and resolution differs
                 var i = 0;
                 while (i < Math.min(directory.length, resolutionDirectory.length) && directory.charCodeAt(i) === resolutionDirectory.charCodeAt(i)) {
                     i++;
                 }
-                // find last directory separator before position i
                 var sep = directory.lastIndexOf(ts.directorySeparator, i);
                 if (sep < 0) {
                     return undefined;
@@ -24601,7 +19908,6 @@ var ts;
             }
             if (perFolderCache) {
                 perFolderCache.set(moduleName, result);
-                // put result in per-module name cache
                 var perModuleNameCache = cache.getOrCreateCacheForModuleName(moduleName);
                 if (perModuleNameCache) {
                     perModuleNameCache.set(containingDirectory, result);
@@ -24619,66 +19925,6 @@ var ts;
         return result;
     }
     ts.resolveModuleName = resolveModuleName;
-    /**
-     * Any module resolution kind can be augmented with optional settings: 'baseUrl', 'paths' and 'rootDirs' - they are used to
-     * mitigate differences between design time structure of the project and its runtime counterpart so the same import name
-     * can be resolved successfully by TypeScript compiler and runtime module loader.
-     * If these settings are set then loading procedure will try to use them to resolve module name and it can of failure it will
-     * fallback to standard resolution routine.
-     *
-     * - baseUrl - this setting controls how non-relative module names are resolved. If this setting is specified then non-relative
-     * names will be resolved relative to baseUrl: i.e. if baseUrl is '/a/b' then candidate location to resolve module name 'c/d' will
-     * be '/a/b/c/d'
-     * - paths - this setting can only be used when baseUrl is specified. allows to tune how non-relative module names
-     * will be resolved based on the content of the module name.
-     * Structure of 'paths' compiler options
-     * 'paths': {
-     *    pattern-1: [...substitutions],
-     *    pattern-2: [...substitutions],
-     *    ...
-     *    pattern-n: [...substitutions]
-     * }
-     * Pattern here is a string that can contain zero or one '*' character. During module resolution module name will be matched against
-     * all patterns in the list. Matching for patterns that don't contain '*' means that module name must be equal to pattern respecting the case.
-     * If pattern contains '*' then to match pattern "<prefix>*<suffix>" module name must start with the <prefix> and end with <suffix>.
-     * <MatchedStar> denotes part of the module name between <prefix> and <suffix>.
-     * If module name can be matches with multiple patterns then pattern with the longest prefix will be picked.
-     * After selecting pattern we'll use list of substitutions to get candidate locations of the module and the try to load module
-     * from the candidate location.
-     * Substitution is a string that can contain zero or one '*'. To get candidate location from substitution we'll pick every
-     * substitution in the list and replace '*' with <MatchedStar> string. If candidate location is not rooted it
-     * will be converted to absolute using baseUrl.
-     * For example:
-     * baseUrl: /a/b/c
-     * "paths": {
-     *     // match all module names
-     *     "*": [
-     *         "*",        // use matched name as is,
-     *                     // <matched name> will be looked as /a/b/c/<matched name>
-     *
-     *         "folder1/*" // substitution will convert matched name to 'folder1/<matched name>',
-     *                     // since it is not rooted then final candidate location will be /a/b/c/folder1/<matched name>
-     *     ],
-     *     // match module names that start with 'components/'
-     *     "components/*": [ "/root/components/*" ] // substitution will convert /components/folder1/<matched name> to '/root/components/folder1/<matched name>',
-     *                                              // it is rooted so it will be final candidate location
-     * }
-     *
-     * 'rootDirs' allows the project to be spreaded across multiple locations and resolve modules with relative names as if
-     * they were in the same location. For example lets say there are two files
-     * '/local/src/content/file1.ts'
-     * '/shared/components/contracts/src/content/protocols/file2.ts'
-     * After bundling content of '/shared/components/contracts/src' will be merged with '/local/src' so
-     * if file1 has the following import 'import {x} from "./protocols/file2"' it will be resolved successfully in runtime.
-     * 'rootDirs' provides the way to tell compiler that in order to get the whole project it should behave as if content of all
-     * root dirs were merged together.
-     * I.e. for the example above 'rootDirs' will have two entries: [ '/local/src', '/shared/components/contracts/src' ].
-     * Compiler will first convert './protocols/file2' into absolute path relative to the location of containing file:
-     * '/local/src/content/protocols/file2' and try to load it - failure.
-     * Then it will search 'rootDirs' looking for a longest matching prefix of this absolute path and if such prefix is found - absolute path will
-     * be converted to a path relative to found rootDir entry './content/protocols/file2' (*). As a last step compiler will check all remaining
-     * entries in 'rootDirs', use them to build absolute path out of (*) and try to resolve module from this location.
-     */
     function tryLoadModuleUsingOptionalResolutionSettings(extensions, moduleName, containingDirectory, loader, failedLookupLocations, state) {
         if (!ts.isExternalModuleNameRelative(moduleName)) {
             return tryLoadModuleUsingBaseUrl(extensions, moduleName, loader, failedLookupLocations, state);
@@ -24699,9 +19945,6 @@ var ts;
         var matchedNormalizedPrefix;
         for (var _i = 0, _a = state.compilerOptions.rootDirs; _i < _a.length; _i++) {
             var rootDir = _a[_i];
-            // rootDirs are expected to be absolute
-            // in case of tsconfig.json this will happen automatically - compiler will expand relative names
-            // using location of tsconfig.json as base location
             var normalizedRoot = ts.normalizePath(rootDir);
             if (!ts.endsWith(normalizedRoot, ts.directorySeparator)) {
                 normalizedRoot += ts.directorySeparator;
@@ -24721,7 +19964,6 @@ var ts;
                 trace(state.host, ts.Diagnostics.Longest_matching_prefix_for_0_is_1, candidate, matchedNormalizedPrefix);
             }
             var suffix = candidate.substr(matchedNormalizedPrefix.length);
-            // first - try to load from a initial location
             if (state.traceEnabled) {
                 trace(state.host, ts.Diagnostics.Loading_0_from_the_root_dir_1_candidate_location_2, suffix, matchedNormalizedPrefix, candidate);
             }
@@ -24732,11 +19974,9 @@ var ts;
             if (state.traceEnabled) {
                 trace(state.host, ts.Diagnostics.Trying_other_entries_in_rootDirs);
             }
-            // then try to resolve using remaining entries in rootDirs
             for (var _b = 0, _c = state.compilerOptions.rootDirs; _b < _c.length; _b++) {
                 var rootDir = _c[_b];
                 if (rootDir === matchedRootDir) {
-                    // skip the initially matched entry
                     continue;
                 }
                 var candidate_1 = ts.combinePaths(ts.normalizePath(rootDir), suffix);
@@ -24762,7 +20002,6 @@ var ts;
         if (state.traceEnabled) {
             trace(state.host, ts.Diagnostics.baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1, state.compilerOptions.baseUrl, moduleName);
         }
-        // string is for exact match
         var matchedPattern;
         if (state.compilerOptions.paths) {
             if (state.traceEnabled) {
@@ -24782,10 +20021,9 @@ var ts;
                 if (state.traceEnabled) {
                     trace(state.host, ts.Diagnostics.Trying_substitution_0_candidate_module_location_Colon_1, subst, path);
                 }
-                // A path mapping may have an extension, in contrast to an import, which should omit it.
                 var extension = ts.tryGetExtensionFromPath(candidate);
                 if (extension !== undefined) {
-                    var path_1 = tryFile(candidate, failedLookupLocations, /*onlyRecordFailures*/ false, state);
+                    var path_1 = tryFile(candidate, failedLookupLocations, false, state);
                     if (path_1 !== undefined) {
                         return noPackageId({ path: path_1, ext: extension });
                     }
@@ -24802,17 +20040,11 @@ var ts;
         }
     }
     function nodeModuleNameResolver(moduleName, containingFile, compilerOptions, host, cache) {
-        return nodeModuleNameResolverWorker(moduleName, ts.getDirectoryPath(containingFile), compilerOptions, host, cache, /*jsOnly*/ false);
+        return nodeModuleNameResolverWorker(moduleName, ts.getDirectoryPath(containingFile), compilerOptions, host, cache, false);
     }
     ts.nodeModuleNameResolver = nodeModuleNameResolver;
-    /**
-     * Expose resolution logic to allow us to use Node module resolution logic from arbitrary locations.
-     * No way to do this with `require()`: https://github.com/nodejs/node/issues/5963
-     * Throws an error if the module can't be resolved.
-     */
-    /* @internal */
     function resolveJavaScriptModule(moduleName, initialDir, host) {
-        var _a = nodeModuleNameResolverWorker(moduleName, initialDir, { moduleResolution: ts.ModuleResolutionKind.NodeJs, allowJs: true }, host, /*cache*/ undefined, /*jsOnly*/ true), resolvedModule = _a.resolvedModule, failedLookupLocations = _a.failedLookupLocations;
+        var _a = nodeModuleNameResolverWorker(moduleName, initialDir, { moduleResolution: ts.ModuleResolutionKind.NodeJs, allowJs: true }, host, undefined, true), resolvedModule = _a.resolvedModule, failedLookupLocations = _a.failedLookupLocations;
         if (!resolvedModule) {
             throw new Error("Could not resolve JS module '" + moduleName + "' starting at '" + initialDir + "'. Looked in: " + failedLookupLocations.join(", "));
         }
@@ -24834,7 +20066,7 @@ var ts;
         }
         return { resolvedModule: undefined, failedLookupLocations: failedLookupLocations };
         function tryResolve(extensions) {
-            var loader = function (extensions, candidate, failedLookupLocations, onlyRecordFailures, state) { return nodeLoadModuleByRelativeName(extensions, candidate, failedLookupLocations, onlyRecordFailures, state, /*considerPackageJson*/ true); };
+            var loader = function (extensions, candidate, failedLookupLocations, onlyRecordFailures, state) { return nodeLoadModuleByRelativeName(extensions, candidate, failedLookupLocations, onlyRecordFailures, state, true); };
             var resolved = tryLoadModuleUsingOptionalResolutionSettings(extensions, moduleName, containingDirectory, loader, failedLookupLocations, state);
             if (resolved) {
                 return toSearchResult({ resolved: resolved, isExternalLibraryImport: false });
@@ -24856,13 +20088,11 @@ var ts;
                     }
                     resolvedValue = __assign({}, resolvedValue, { path: path });
                 }
-                // For node_modules lookups, get the real path so that multiple accesses to an `npm link`-ed module do not create duplicate files.
                 return { value: resolvedValue && { resolved: resolvedValue, originalPath: originalPath, isExternalLibraryImport: true } };
             }
             else {
                 var _a = ts.normalizePathAndParts(ts.combinePaths(containingDirectory, moduleName)), candidate = _a.path, parts = _a.parts;
-                var resolved_2 = nodeLoadModuleByRelativeName(extensions, candidate, failedLookupLocations, /*onlyRecordFailures*/ false, state, /*considerPackageJson*/ true);
-                // Treat explicit "node_modules" import as an external library import.
+                var resolved_2 = nodeLoadModuleByRelativeName(extensions, candidate, failedLookupLocations, false, state, true);
                 return resolved_2 && toSearchResult({ resolved: resolved_2, isExternalLibraryImport: ts.contains(parts, "node_modules") });
             }
         }
@@ -24875,7 +20105,7 @@ var ts;
         if (traceEnabled) {
             trace(host, ts.Diagnostics.Resolving_real_path_for_0_result_1, path, real);
         }
-        ts.Debug.assert(host.fileExists(real), path + " linked to nonexistent file " + real); // tslint:disable-line
+        ts.Debug.assert(host.fileExists(real), path + " linked to nonexistent file " + real);
         return real;
     }
     function nodeLoadModuleByRelativeName(extensions, candidate, failedLookupLocations, onlyRecordFailures, state, considerPackageJson) {
@@ -24895,7 +20125,7 @@ var ts;
             var resolvedFromFile = loadModuleFromFile(extensions, candidate, failedLookupLocations, onlyRecordFailures, state);
             if (resolvedFromFile) {
                 var nm = considerPackageJson ? parseNodeModuleFromPath(resolvedFromFile) : undefined;
-                var packageId = nm && getPackageJsonInfo(nm.packageDirectory, nm.subModuleName, failedLookupLocations, /*onlyRecordFailures*/ false, state).packageId;
+                var packageId = nm && getPackageJsonInfo(nm.packageDirectory, nm.subModuleName, failedLookupLocations, false, state).packageId;
                 return withPackageId(packageId, resolvedFromFile);
             }
         }
@@ -24911,17 +20141,6 @@ var ts;
         return loadNodeModuleFromDirectory(extensions, candidate, failedLookupLocations, onlyRecordFailures, state, considerPackageJson);
     }
     var nodeModulesPathPart = "/node_modules/";
-    /**
-     * This will be called on the successfully resolved path from `loadModuleFromFile`.
-     * (Not neeeded for `loadModuleFromNodeModules` as that looks up the `package.json` as part of resolution.)
-     *
-     * packageDirectory is the directory of the package itself.
-     * subModuleName is the path within the package.
-     *   For `blah/node_modules/foo/index.d.ts` this is { packageDirectory: "foo", subModuleName: "index.d.ts" }. (Part before "/node_modules/" is ignored.)
-     *   For `/node_modules/foo/bar.d.ts` this is { packageDirectory: "foo", subModuleName": "bar/index.d.ts" }.
-     *   For `/node_modules/@types/foo/bar/index.d.ts` this is { packageDirectory: "@types/foo", subModuleName: "bar/index.d.ts" }.
-     *   For `/node_modules/foo/bar/index.d.ts` this is { packageDirectory: "foo", subModuleName": "bar/index.d.ts" }.
-     */
     function parseNodeModuleFromPath(resolved) {
         var path = ts.normalizePath(resolved.path);
         var idx = path.lastIndexOf(nodeModulesPathPart);
@@ -24930,11 +20149,11 @@ var ts;
         }
         var indexAfterNodeModules = idx + nodeModulesPathPart.length;
         var indexAfterPackageName = moveToNextDirectorySeparatorIfAvailable(path, indexAfterNodeModules);
-        if (path.charCodeAt(indexAfterNodeModules) === 64 /* at */) {
+        if (path.charCodeAt(indexAfterNodeModules) === 64) {
             indexAfterPackageName = moveToNextDirectorySeparatorIfAvailable(path, indexAfterPackageName);
         }
         var packageDirectory = path.slice(0, indexAfterPackageName);
-        var subModuleName = ts.removeExtension(path.slice(indexAfterPackageName + 1), resolved.ext) + ".d.ts" /* Dts */;
+        var subModuleName = ts.removeExtension(path.slice(indexAfterPackageName + 1), resolved.ext) + ".d.ts";
         return { packageDirectory: packageDirectory, subModuleName: subModuleName };
     }
     function moveToNextDirectorySeparatorIfAvailable(path, prevSeparatorIndex) {
@@ -24953,31 +20172,22 @@ var ts;
         }
         return path + "/index.d.ts";
     }
-    /* @internal */
     function directoryProbablyExists(directoryName, host) {
-        // if host does not support 'directoryExists' assume that directory will exist
         return !host.directoryExists || host.directoryExists(directoryName);
     }
     ts.directoryProbablyExists = directoryProbablyExists;
     function loadModuleFromFileNoPackageId(extensions, candidate, failedLookupLocations, onlyRecordFailures, state) {
         return noPackageId(loadModuleFromFile(extensions, candidate, failedLookupLocations, onlyRecordFailures, state));
     }
-    /**
-     * @param {boolean} onlyRecordFailures - if true then function won't try to actually load files but instead record all attempts as failures. This flag is necessary
-     * in cases when we know upfront that all load attempts will fail (because containing folder does not exists) however we still need to record all failed lookup locations.
-     */
     function loadModuleFromFile(extensions, candidate, failedLookupLocations, onlyRecordFailures, state) {
         if (extensions === Extensions.Json) {
-            var extensionLess = ts.tryRemoveExtension(candidate, ".json" /* Json */);
+            var extensionLess = ts.tryRemoveExtension(candidate, ".json");
             return extensionLess === undefined ? undefined : tryAddingExtensions(extensionLess, extensions, failedLookupLocations, onlyRecordFailures, state);
         }
-        // First, try adding an extension. An import of "foo" could be matched by a file "foo.ts", or "foo.js" by "foo.js.ts"
         var resolvedByAddingExtension = tryAddingExtensions(candidate, extensions, failedLookupLocations, onlyRecordFailures, state);
         if (resolvedByAddingExtension) {
             return resolvedByAddingExtension;
         }
-        // If that didn't work, try stripping a ".js" or ".jsx" extension and replacing it with a TypeScript one;
-        // e.g. "./foo.js" can be matched by "./foo.ts" or "./foo.d.ts"
         if (ts.hasJavaScriptFileExtension(candidate)) {
             var extensionless = ts.removeFileExtension(candidate);
             if (state.traceEnabled) {
@@ -24987,10 +20197,8 @@ var ts;
             return tryAddingExtensions(extensionless, extensions, failedLookupLocations, onlyRecordFailures, state);
         }
     }
-    /** Try to return an existing file that adds one of the `extensions` to `candidate`. */
     function tryAddingExtensions(candidate, extensions, failedLookupLocations, onlyRecordFailures, state) {
         if (!onlyRecordFailures) {
-            // check if containing folder exists - if it doesn't then just record failures for all supported extensions without disk probing
             var directory = ts.getDirectoryPath(candidate);
             if (directory) {
                 onlyRecordFailures = !directoryProbablyExists(directory, state.host);
@@ -24998,20 +20206,19 @@ var ts;
         }
         switch (extensions) {
             case Extensions.DtsOnly:
-                return tryExtension(".d.ts" /* Dts */);
+                return tryExtension(".d.ts");
             case Extensions.TypeScript:
-                return tryExtension(".ts" /* Ts */) || tryExtension(".tsx" /* Tsx */) || tryExtension(".d.ts" /* Dts */);
+                return tryExtension(".ts") || tryExtension(".tsx") || tryExtension(".d.ts");
             case Extensions.JavaScript:
-                return tryExtension(".js" /* Js */) || tryExtension(".jsx" /* Jsx */);
+                return tryExtension(".js") || tryExtension(".jsx");
             case Extensions.Json:
-                return tryExtension(".json" /* Json */);
+                return tryExtension(".json");
         }
         function tryExtension(ext) {
             var path = tryFile(candidate + ext, failedLookupLocations, onlyRecordFailures, state);
             return path === undefined ? undefined : { path: path, ext: ext };
         }
     }
-    /** Return the file if it exists. */
     function tryFile(fileName, failedLookupLocations, onlyRecordFailures, state) {
         if (!onlyRecordFailures) {
             if (state.host.fileExists(fileName)) {
@@ -25050,25 +20257,25 @@ var ts;
         var packageJsonPath = pathToPackageJson(nodeModuleDirectory);
         if (directoryExists && host.fileExists(packageJsonPath)) {
             var packageJsonContent = readJson(packageJsonPath, host);
-            if (subModuleName === "") { // looking up the root - need to handle types/typings/main redirects for subModuleName
-                var path = tryReadPackageJsonFields(/*readTypes*/ true, packageJsonContent, nodeModuleDirectory, state);
+            if (subModuleName === "") {
+                var path = tryReadPackageJsonFields(true, packageJsonContent, nodeModuleDirectory, state);
                 if (typeof path === "string") {
                     subModuleName = addExtensionAndIndex(path.substring(nodeModuleDirectory.length + 1));
                 }
                 else {
-                    var jsPath = tryReadPackageJsonFields(/*readTypes*/ false, packageJsonContent, nodeModuleDirectory, state);
+                    var jsPath = tryReadPackageJsonFields(false, packageJsonContent, nodeModuleDirectory, state);
                     if (typeof jsPath === "string" && jsPath.length > nodeModuleDirectory.length) {
                         var potentialSubModule_1 = jsPath.substring(nodeModuleDirectory.length + 1);
                         subModuleName = (ts.forEach(ts.supportedJavascriptExtensions, function (extension) {
                             return ts.tryRemoveExtension(potentialSubModule_1, extension);
-                        }) || potentialSubModule_1) + ".d.ts" /* Dts */;
+                        }) || potentialSubModule_1) + ".d.ts";
                     }
                     else {
                         subModuleName = "index.d.ts";
                     }
                 }
             }
-            if (!ts.endsWith(subModuleName, ".d.ts" /* Dts */)) {
+            if (!ts.endsWith(subModuleName, ".d.ts")) {
                 subModuleName = addExtensionAndIndex(subModuleName);
             }
             var packageId = typeof packageJsonContent.name === "string" && typeof packageJsonContent.version === "string"
@@ -25088,7 +20295,6 @@ var ts;
             if (directoryExists && traceEnabled) {
                 trace(host, ts.Diagnostics.File_0_does_not_exist, packageJsonPath);
             }
-            // record package json as one of failed lookup locations - in the future if this file will appear it will invalidate resolution results
             failedLookupLocations.push(packageJsonPath);
             return { found: false, packageJsonContent: undefined, packageId: undefined };
         }
@@ -25097,8 +20303,7 @@ var ts;
         var file = tryReadPackageJsonFields(extensions !== Extensions.JavaScript && extensions !== Extensions.Json, jsonContent, candidate, state);
         if (!file) {
             if (extensions === Extensions.TypeScript) {
-                // When resolving typescript modules, try resolving using main field as well
-                file = tryReadPackageJsonFields(/*readTypes*/ false, jsonContent, candidate, state);
+                file = tryReadPackageJsonFields(false, jsonContent, candidate, state);
                 if (!file) {
                     return undefined;
                 }
@@ -25118,32 +20323,27 @@ var ts;
                 trace(state.host, ts.Diagnostics.File_0_has_an_unsupported_extension_so_skipping_it, fromFile);
             }
         }
-        // Even if extensions is DtsOnly, we can still look up a .ts file as a result of package.json "types"
         var nextExtensions = extensions === Extensions.DtsOnly ? Extensions.TypeScript : extensions;
-        // Don't do package.json lookup recursively, because Node.js' package lookup doesn't.
-        var result = nodeLoadModuleByRelativeName(nextExtensions, file, failedLookupLocations, onlyRecordFailures, state, /*considerPackageJson*/ false);
+        var result = nodeLoadModuleByRelativeName(nextExtensions, file, failedLookupLocations, onlyRecordFailures, state, false);
         if (result) {
-            // It won't have a `packageId` set, because we disabled `considerPackageJson`.
             ts.Debug.assert(result.packageId === undefined);
             return { path: result.path, ext: result.extension };
         }
     }
-    /** Resolve from an arbitrarily specified file. Return `undefined` if it has an unsupported extension. */
     function resolvedIfExtensionMatches(extensions, path) {
         var ext = ts.tryGetExtensionFromPath(path);
         return ext !== undefined && extensionIsOk(extensions, ext) ? { path: path, ext: ext } : undefined;
     }
-    /** True if `extension` is one of the supported `extensions`. */
     function extensionIsOk(extensions, extension) {
         switch (extensions) {
             case Extensions.JavaScript:
-                return extension === ".js" /* Js */ || extension === ".jsx" /* Jsx */;
+                return extension === ".js" || extension === ".jsx";
             case Extensions.Json:
-                return extension === ".json" /* Json */;
+                return extension === ".json";
             case Extensions.TypeScript:
-                return extension === ".ts" /* Ts */ || extension === ".tsx" /* Tsx */ || extension === ".d.ts" /* Dts */;
+                return extension === ".ts" || extension === ".tsx" || extension === ".d.ts";
             case Extensions.DtsOnly:
-                return extension === ".d.ts" /* Dts */;
+                return extension === ".d.ts";
         }
     }
     function pathToPackageJson(directory) {
@@ -25151,18 +20351,16 @@ var ts;
     }
     function loadModuleFromNodeModulesFolder(extensions, moduleName, nodeModulesFolder, nodeModulesFolderExists, failedLookupLocations, state) {
         var candidate = ts.normalizePath(ts.combinePaths(nodeModulesFolder, moduleName));
-        // First look for a nested package.json, as in `node_modules/foo/bar/package.json`.
         var packageJsonContent;
         var packageId;
-        var packageInfo = getPackageJsonInfo(candidate, "", failedLookupLocations, /*onlyRecordFailures*/ !nodeModulesFolderExists, state);
+        var packageInfo = getPackageJsonInfo(candidate, "", failedLookupLocations, !nodeModulesFolderExists, state);
         if (packageInfo.found) {
             (packageJsonContent = packageInfo.packageJsonContent, packageId = packageInfo.packageId);
         }
         else {
             var _a = getPackageName(moduleName), packageName = _a.packageName, rest = _a.rest;
-            if (rest !== "") { // If "rest" is empty, we just did this search above.
+            if (rest !== "") {
                 var packageRootPath = ts.combinePaths(nodeModulesFolder, packageName);
-                // Don't use a "types" or "main" from here because we're not loading the root, but a subdirectory -- just here for the packageId.
                 packageId = getPackageJsonInfo(packageRootPath, rest, failedLookupLocations, !nodeModulesFolderExists, state).packageId;
             }
         }
@@ -25170,7 +20368,6 @@ var ts;
             loadNodeModuleFromDirectoryWorker(extensions, candidate, failedLookupLocations, !nodeModulesFolderExists, state, packageJsonContent);
         return withPackageId(packageId, pathAndExtension);
     }
-    /* @internal */
     function getPackageName(moduleName) {
         var idx = moduleName.indexOf(ts.directorySeparator);
         if (moduleName[0] === "@") {
@@ -25180,11 +20377,10 @@ var ts;
     }
     ts.getPackageName = getPackageName;
     function loadModuleFromNodeModules(extensions, moduleName, directory, failedLookupLocations, state, cache) {
-        return loadModuleFromNodeModulesWorker(extensions, moduleName, directory, failedLookupLocations, state, /*typesOnly*/ false, cache);
+        return loadModuleFromNodeModulesWorker(extensions, moduleName, directory, failedLookupLocations, state, false, cache);
     }
     function loadModuleFromNodeModulesAtTypes(moduleName, directory, failedLookupLocations, state) {
-        // Extensions parameter here doesn't actually matter, because typesOnly ensures we're just doing @types lookup, which is always DtsOnly.
-        return loadModuleFromNodeModulesWorker(Extensions.DtsOnly, moduleName, directory, failedLookupLocations, state, /*typesOnly*/ true, /*cache*/ undefined);
+        return loadModuleFromNodeModulesWorker(Extensions.DtsOnly, moduleName, directory, failedLookupLocations, state, true, undefined);
     }
     function loadModuleFromNodeModulesWorker(extensions, moduleName, directory, failedLookupLocations, state, typesOnly, cache) {
         var perModuleNameCache = cache && cache.getOrCreateCacheForModuleName(moduleName);
@@ -25198,7 +20394,6 @@ var ts;
             }
         });
     }
-    /** Load a module from a single node_modules directory, but not from any ancestors' node_modules directories. */
     function loadModuleFromNodeModulesOneLevel(extensions, moduleName, directory, failedLookupLocations, state, typesOnly) {
         if (typesOnly === void 0) { typesOnly = false; }
         var nodeModulesFolder = ts.combinePaths(directory, "node_modules");
@@ -25222,9 +20417,7 @@ var ts;
             return loadModuleFromNodeModulesFolder(Extensions.DtsOnly, mangleScopedPackage(moduleName, state), nodeModulesAtTypes_1, nodeModulesAtTypesExists, failedLookupLocations, state);
         }
     }
-    /** Double underscores are used in DefinitelyTyped to delimit scoped packages. */
     var mangledScopedPackageSeparator = "__";
-    /** For a scoped package, we must look in `@types/foo__bar` instead of `@types/@foo/bar`. */
     function mangleScopedPackage(packageName, state) {
         var mangled = getMangledNameForScopedPackage(packageName);
         if (state.traceEnabled && mangled !== packageName) {
@@ -25232,23 +20425,20 @@ var ts;
         }
         return mangled;
     }
-    /* @internal */
     function getTypesPackageName(packageName) {
         return "@types/" + getMangledNameForScopedPackage(packageName);
     }
     ts.getTypesPackageName = getTypesPackageName;
-    /* @internal */
     function getMangledNameForScopedPackage(packageName) {
         if (ts.startsWith(packageName, "@")) {
             var replaceSlash = packageName.replace(ts.directorySeparator, mangledScopedPackageSeparator);
             if (replaceSlash !== packageName) {
-                return replaceSlash.slice(1); // Take off the "@"
+                return replaceSlash.slice(1);
             }
         }
         return packageName;
     }
     ts.getMangledNameForScopedPackage = getMangledNameForScopedPackage;
-    /* @internal */
     function getPackageNameFromAtTypesDirectory(mangledName) {
         var withoutAtTypePrefix = ts.removePrefix(mangledName, "@types/");
         if (withoutAtTypePrefix !== mangledName) {
@@ -25257,7 +20447,6 @@ var ts;
         return mangledName;
     }
     ts.getPackageNameFromAtTypesDirectory = getPackageNameFromAtTypesDirectory;
-    /* @internal */
     function getUnmangledNameForScopedPackage(typesPackageName) {
         return ts.stringContains(typesPackageName, mangledScopedPackageSeparator) ?
             "@" + typesPackageName.replace(mangledScopedPackageSeparator, ts.directorySeparator) :
@@ -25280,8 +20469,7 @@ var ts;
         var failedLookupLocations = [];
         var containingDirectory = ts.getDirectoryPath(containingFile);
         var resolved = tryResolve(Extensions.TypeScript) || tryResolve(Extensions.JavaScript);
-        // No originalPath because classic resolution doesn't resolve realPath
-        return createResolvedModuleWithFailedLookupLocations(resolved && resolved.value, /*originalPath*/ undefined, /*isExternalLibraryImport*/ false, failedLookupLocations);
+        return createResolvedModuleWithFailedLookupLocations(resolved && resolved.value, undefined, false, failedLookupLocations);
         function tryResolve(extensions) {
             var resolvedUsingSettings = tryLoadModuleUsingOptionalResolutionSettings(extensions, moduleName, containingDirectory, loadModuleFromFileNoPackageId, failedLookupLocations, state);
             if (resolvedUsingSettings) {
@@ -25289,35 +20477,28 @@ var ts;
             }
             var perModuleNameCache = cache && cache.getOrCreateCacheForModuleName(moduleName);
             if (!ts.isExternalModuleNameRelative(moduleName)) {
-                // Climb up parent directories looking for a module.
                 var resolved_3 = ts.forEachAncestorDirectory(containingDirectory, function (directory) {
                     var resolutionFromCache = tryFindNonRelativeModuleNameInCache(perModuleNameCache, moduleName, directory, traceEnabled, host, failedLookupLocations);
                     if (resolutionFromCache) {
                         return resolutionFromCache;
                     }
                     var searchName = ts.normalizePath(ts.combinePaths(directory, moduleName));
-                    return toSearchResult(loadModuleFromFileNoPackageId(extensions, searchName, failedLookupLocations, /*onlyRecordFailures*/ false, state));
+                    return toSearchResult(loadModuleFromFileNoPackageId(extensions, searchName, failedLookupLocations, false, state));
                 });
                 if (resolved_3) {
                     return resolved_3;
                 }
                 if (extensions === Extensions.TypeScript) {
-                    // If we didn't find the file normally, look it up in @types.
                     return loadModuleFromNodeModulesAtTypes(moduleName, containingDirectory, failedLookupLocations, state);
                 }
             }
             else {
                 var candidate = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
-                return toSearchResult(loadModuleFromFileNoPackageId(extensions, candidate, failedLookupLocations, /*onlyRecordFailures*/ false, state));
+                return toSearchResult(loadModuleFromFileNoPackageId(extensions, candidate, failedLookupLocations, false, state));
             }
         }
     }
     ts.classicNameResolver = classicNameResolver;
-    /**
-     * LSHost may load a module from a global cache of typings.
-     * This is the minumum code needed to expose that functionality; the rest is in LSHost.
-     */
-    /* @internal */
     function loadModuleFromGlobalCache(moduleName, projectName, compilerOptions, host, globalCache) {
         var traceEnabled = isTraceEnabled(compilerOptions, host);
         if (traceEnabled) {
@@ -25326,80 +20507,47 @@ var ts;
         var state = { compilerOptions: compilerOptions, host: host, traceEnabled: traceEnabled };
         var failedLookupLocations = [];
         var resolved = loadModuleFromNodeModulesOneLevel(Extensions.DtsOnly, moduleName, globalCache, failedLookupLocations, state);
-        return createResolvedModuleWithFailedLookupLocations(resolved, /*originalPath*/ undefined, /*isExternalLibraryImport*/ true, failedLookupLocations);
+        return createResolvedModuleWithFailedLookupLocations(resolved, undefined, true, failedLookupLocations);
     }
     ts.loadModuleFromGlobalCache = loadModuleFromGlobalCache;
-    /**
-     * Wraps value to SearchResult.
-     * @returns undefined if value is undefined or { value } otherwise
-     */
     function toSearchResult(value) {
         return value !== undefined ? { value: value } : undefined;
     }
 })(ts || (ts = {}));
-//# sourceMappingURL=parser.js.map
-"use strict";
-var __assign = (this && this.__assign) || Object.assign || function(t) {
-    for (var s, i = 1, n = arguments.length; i < n; i++) {
-        s = arguments[i];
-        for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
-            t[p] = s[p];
-    }
-    return t;
-};
-var __makeTemplateObject = (this && this.__makeTemplateObject) || function (cooked, raw) {
-    if (Object.defineProperty) { Object.defineProperty(cooked, "raw", { value: raw }); } else { cooked.raw = raw; }
-    return cooked;
-};
-/* @internal */
 var ts;
 (function (ts) {
-    var ModuleInstanceState;
-    (function (ModuleInstanceState) {
-        ModuleInstanceState[ModuleInstanceState["NonInstantiated"] = 0] = "NonInstantiated";
-        ModuleInstanceState[ModuleInstanceState["Instantiated"] = 1] = "Instantiated";
-        ModuleInstanceState[ModuleInstanceState["ConstEnumOnly"] = 2] = "ConstEnumOnly";
-    })(ModuleInstanceState = ts.ModuleInstanceState || (ts.ModuleInstanceState = {}));
     function getModuleInstanceState(node) {
-        return node.body ? getModuleInstanceStateWorker(node.body) : 1 /* Instantiated */;
+        return node.body ? getModuleInstanceStateWorker(node.body) : 1;
     }
     ts.getModuleInstanceState = getModuleInstanceState;
     function getModuleInstanceStateWorker(node) {
-        // A module is uninstantiated if it contains only
         switch (node.kind) {
-            // 1. interface declarations, type alias declarations
-            case 236 /* InterfaceDeclaration */:
-            case 237 /* TypeAliasDeclaration */:
-                return 0 /* NonInstantiated */;
-            // 2. const enum declarations
-            case 238 /* EnumDeclaration */:
+            case 236:
+            case 237:
+                return 0;
+            case 238:
                 if (ts.isConst(node)) {
-                    return 2 /* ConstEnumOnly */;
+                    return 2;
                 }
                 break;
-            // 3. non-exported import declarations
-            case 244 /* ImportDeclaration */:
-            case 243 /* ImportEqualsDeclaration */:
-                if (!(ts.hasModifier(node, 1 /* Export */))) {
-                    return 0 /* NonInstantiated */;
+            case 244:
+            case 243:
+                if (!(ts.hasModifier(node, 1))) {
+                    return 0;
                 }
                 break;
-            // 4. other uninstantiated module declarations.
-            case 240 /* ModuleBlock */: {
-                var state_1 = 0 /* NonInstantiated */;
+            case 240: {
+                var state_1 = 0;
                 ts.forEachChild(node, function (n) {
                     var childState = getModuleInstanceStateWorker(n);
                     switch (childState) {
-                        case 0 /* NonInstantiated */:
-                            // child is non-instantiated - continue searching
+                        case 0:
                             return;
-                        case 2 /* ConstEnumOnly */:
-                            // child is const enum only - record state and continue searching
-                            state_1 = 2 /* ConstEnumOnly */;
+                        case 2:
+                            state_1 = 2;
                             return;
-                        case 1 /* Instantiated */:
-                            // child is instantiated - record state and stop
-                            state_1 = 1 /* Instantiated */;
+                        case 1:
+                            state_1 = 1;
                             return true;
                         default:
                             ts.Debug.assertNever(childState);
@@ -25407,41 +20555,15 @@ var ts;
                 });
                 return state_1;
             }
-            case 239 /* ModuleDeclaration */:
+            case 239:
                 return getModuleInstanceState(node);
-            case 71 /* Identifier */:
-                // Only jsdoc typedef definition can exist in jsdoc namespace, and it should
-                // be considered the same as type alias
+            case 71:
                 if (node.isInJSDocNamespace) {
-                    return 0 /* NonInstantiated */;
-                }
-        }
-        return 1 /* Instantiated */;
-    }
-    var ContainerFlags;
-    (function (ContainerFlags) {
-        // The current node is not a container, and no container manipulation should happen before
-        // recursing into it.
-        ContainerFlags[ContainerFlags["None"] = 0] = "None";
-        // The current node is a container.  It should be set as the current container (and block-
-        // container) before recursing into it.  The current node does not have locals.  Examples:
-        //
-        //      Classes, ObjectLiterals, TypeLiterals, Interfaces...
-        ContainerFlags[ContainerFlags["IsContainer"] = 1] = "IsContainer";
-        // The current node is a block-scoped-container.  It should be set as the current block-
-        // container before recursing into it.  Examples:
-        //
-        //      Blocks (when not parented by functions), Catch clauses, For/For-in/For-of statements...
-        ContainerFlags[ContainerFlags["IsBlockScopedContainer"] = 2] = "IsBlockScopedContainer";
-        // The current node is the container of a control flow path. The current control flow should
-        // be saved and restored, and a new control flow initialized within the container.
-        ContainerFlags[ContainerFlags["IsControlFlowContainer"] = 4] = "IsControlFlowContainer";
-        ContainerFlags[ContainerFlags["IsFunctionLike"] = 8] = "IsFunctionLike";
-        ContainerFlags[ContainerFlags["IsFunctionExpression"] = 16] = "IsFunctionExpression";
-        ContainerFlags[ContainerFlags["HasLocals"] = 32] = "HasLocals";
-        ContainerFlags[ContainerFlags["IsInterface"] = 64] = "IsInterface";
-        ContainerFlags[ContainerFlags["IsObjectLiteralOrClassExpressionMethod"] = 128] = "IsObjectLiteralOrClassExpressionMethod";
-    })(ContainerFlags || (ContainerFlags = {}));
+                    return 0;
+                }
+        }
+        return 1;
+    }
     var binder = createBinder();
     function bindSourceFile(file, options) {
         ts.performance.mark("beforeBind");
@@ -25456,12 +20578,11 @@ var ts;
         var languageVersion;
         var parent;
         var container;
-        var thisParentContainer; // Container one level up
+        var thisParentContainer;
         var blockScopeContainer;
         var lastContainer;
         var delayedTypeAliases;
         var seenThisKeyword;
-        // state used by control flow analysis
         var currentFlow;
         var currentBreakTarget;
         var currentContinueTarget;
@@ -25471,26 +20592,15 @@ var ts;
         var preSwitchCaseFlow;
         var activeLabels;
         var hasExplicitReturn;
-        // state used for emit helpers
         var emitFlags;
-        // If this file is an external module, then it is automatically in strict-mode according to
-        // ES6.  If it is not an external module, then we'll determine if it is in strict mode or
-        // not depending on if we see "use strict" in certain places or if we hit a class/namespace
-        // or if compiler options contain alwaysStrict.
         var inStrictMode;
         var symbolCount = 0;
-        var Symbol; // tslint:disable-line variable-name
+        var Symbol;
         var classifiableNames;
-        var unreachableFlow = { flags: 1 /* Unreachable */ };
-        var reportedUnreachableFlow = { flags: 1 /* Unreachable */ };
-        // state used to aggregate transform flags during bind.
-        var subtreeTransformFlags = 0 /* None */;
+        var unreachableFlow = { flags: 1 };
+        var reportedUnreachableFlow = { flags: 1 };
+        var subtreeTransformFlags = 0;
         var skipTransformFlagAggregation;
-        /**
-         * Inside the binder, we may create a diagnostic for an as-yet unbound node (with potentially no parent pointers, implying no accessible source file)
-         * If so, the node _must_ be in the current file (as that's the only way anything could have traversed to it to yield it as the error node)
-         * This version of `createDiagnosticForNode` uses the binder's context to account for this, and always yields correct diagnostics even in these situations.
-         */
         function createDiagnosticForNode(node, message, arg0, arg1, arg2) {
             return ts.createDiagnosticForNodeInSourceFile(ts.getSourceFileOfNode(node) || file, node, message, arg0, arg1, arg2);
         }
@@ -25527,13 +20637,12 @@ var ts;
             currentFalseTarget = undefined;
             activeLabels = undefined;
             hasExplicitReturn = false;
-            emitFlags = 0 /* None */;
-            subtreeTransformFlags = 0 /* None */;
+            emitFlags = 0;
+            subtreeTransformFlags = 0;
         }
         return bindSourceFile;
         function bindInStrictMode(file, opts) {
             if (ts.getStrictOptionValue(opts, "alwaysStrict") && !file.isDeclarationFile) {
-                // bind in strict mode source files with alwaysStrict option
                 return true;
             }
             else {
@@ -25548,26 +20657,23 @@ var ts;
             symbol.flags |= symbolFlags;
             node.symbol = symbol;
             symbol.declarations = ts.append(symbol.declarations, node);
-            if (symbolFlags & 1952 /* HasExports */ && !symbol.exports) {
+            if (symbolFlags & 1955 && !symbol.exports) {
                 symbol.exports = ts.createSymbolTable();
             }
-            if (symbolFlags & 6240 /* HasMembers */ && !symbol.members) {
+            if (symbolFlags & 6240 && !symbol.members) {
                 symbol.members = ts.createSymbolTable();
             }
-            if (symbolFlags & 67216319 /* Value */) {
+            if (symbolFlags & 67216319) {
                 var valueDeclaration = symbol.valueDeclaration;
                 if (!valueDeclaration ||
                     (valueDeclaration.kind !== node.kind && ts.isEffectiveModuleDeclaration(valueDeclaration))) {
-                    // other kinds of value declarations take precedence over modules
                     symbol.valueDeclaration = node;
                 }
             }
         }
-        // Should not be called on a declaration with a computed property name,
-        // unless it is a well known Symbol.
         function getDeclarationName(node) {
-            if (node.kind === 249 /* ExportAssignment */) {
-                return node.isExportEquals ? "export=" /* ExportEquals */ : "default" /* Default */;
+            if (node.kind === 249) {
+                return node.isExportEquals ? "export=" : "default";
             }
             var name = ts.getNameOfDeclaration(node);
             if (name) {
@@ -25575,9 +20681,8 @@ var ts;
                     var moduleName = ts.getTextOfIdentifierOrLiteral(name);
                     return (ts.isGlobalScopeAugmentation(node) ? "__global" : "\"" + moduleName + "\"");
                 }
-                if (name.kind === 147 /* ComputedPropertyName */) {
+                if (name.kind === 147) {
                     var nameExpression = name.expression;
-                    // treat computed property names where expression is string/numeric literal as just string/numeric literal
                     if (ts.isStringOrNumericLiteral(nameExpression)) {
                         return ts.escapeLeadingUnderscores(nameExpression.text);
                     }
@@ -25587,130 +20692,81 @@ var ts;
                 return ts.isPropertyNameLiteral(name) ? ts.getEscapedTextOfIdentifierOrLiteral(name) : undefined;
             }
             switch (node.kind) {
-                case 155 /* Constructor */:
-                    return "__constructor" /* Constructor */;
-                case 163 /* FunctionType */:
-                case 158 /* CallSignature */:
-                case 288 /* JSDocSignature */:
-                    return "__call" /* Call */;
-                case 164 /* ConstructorType */:
-                case 159 /* ConstructSignature */:
-                    return "__new" /* New */;
-                case 160 /* IndexSignature */:
-                    return "__index" /* Index */;
-                case 250 /* ExportDeclaration */:
-                    return "__export" /* ExportStar */;
-                case 274 /* SourceFile */:
-                    // json file should behave as
-                    // module.exports = ...
-                    return "export=" /* ExportEquals */;
-                case 200 /* BinaryExpression */:
-                    if (ts.getSpecialPropertyAssignmentKind(node) === 2 /* ModuleExports */) {
-                        // module.exports = ...
-                        return "export=" /* ExportEquals */;
+                case 155:
+                    return "__constructor";
+                case 163:
+                case 158:
+                case 288:
+                    return "__call";
+                case 164:
+                case 159:
+                    return "__new";
+                case 160:
+                    return "__index";
+                case 250:
+                    return "__export";
+                case 274:
+                    return "export=";
+                case 200:
+                    if (ts.getSpecialPropertyAssignmentKind(node) === 2) {
+                        return "export=";
                     }
                     ts.Debug.fail("Unknown binary declaration kind");
                     break;
-                case 284 /* JSDocFunctionType */:
-                    return (ts.isJSDocConstructSignature(node) ? "__new" /* New */ : "__call" /* Call */);
-                case 149 /* Parameter */:
-                    // Parameters with names are handled at the top of this function.  Parameters
-                    // without names can only come from JSDocFunctionTypes.
-                    ts.Debug.assert(node.parent.kind === 284 /* JSDocFunctionType */, "Impossible parameter parent kind", function () { return "parent is: " + (ts.SyntaxKind ? ts.SyntaxKind[node.parent.kind] : node.parent.kind) + ", expected JSDocFunctionType"; });
+                case 284:
+                    return (ts.isJSDocConstructSignature(node) ? "__new" : "__call");
+                case 149:
+                    ts.Debug.assert(node.parent.kind === 284, "Impossible parameter parent kind", function () { return "parent is: " + (ts.SyntaxKind ? ts.SyntaxKind[node.parent.kind] : node.parent.kind) + ", expected JSDocFunctionType"; });
                     var functionType = node.parent;
                     var index = functionType.parameters.indexOf(node);
                     return "arg" + index;
             }
         }
         function getDisplayName(node) {
-            return ts.isNamedDeclaration(node) ? ts.declarationNameToString(node.name) : ts.unescapeLeadingUnderscores(getDeclarationName(node)); // TODO: GH#18217
-        }
-        /**
-         * Declares a Symbol for the node and adds it to symbols. Reports errors for conflicting identifier names.
-         * @param symbolTable - The symbol table which node will be added to.
-         * @param parent - node's parent declaration.
-         * @param node - The declaration to be added to the symbol table
-         * @param includes - The SymbolFlags that node has in addition to its declaration type (eg: export, ambient, etc.)
-         * @param excludes - The flags which node cannot be declared alongside in a symbol table. Used to report forbidden declarations.
-         */
+            return ts.isNamedDeclaration(node) ? ts.declarationNameToString(node.name) : ts.unescapeLeadingUnderscores(getDeclarationName(node));
+        }
         function declareSymbol(symbolTable, parent, node, includes, excludes, isReplaceableByMethod) {
             ts.Debug.assert(!ts.hasDynamicName(node));
-            var isDefaultExport = ts.hasModifier(node, 512 /* Default */);
-            // The exported symbol for an export default function/class node is always named "default"
-            var name = isDefaultExport && parent ? "default" /* Default */ : getDeclarationName(node);
+            var isDefaultExport = ts.hasModifier(node, 512);
+            var name = isDefaultExport && parent ? "default" : getDeclarationName(node);
             var symbol;
             if (name === undefined) {
-                symbol = createSymbol(0 /* None */, "__missing" /* Missing */);
+                symbol = createSymbol(0, "__missing");
             }
             else {
-                // Check and see if the symbol table already has a symbol with this name.  If not,
-                // create a new symbol with this name and add it to the table.  Note that we don't
-                // give the new symbol any flags *yet*.  This ensures that it will not conflict
-                // with the 'excludes' flags we pass in.
-                //
-                // If we do get an existing symbol, see if it conflicts with the new symbol we're
-                // creating.  For example, a 'var' symbol and a 'class' symbol will conflict within
-                // the same symbol table.  If we have a conflict, report the issue on each
-                // declaration we have for this symbol, and then create a new symbol for this
-                // declaration.
-                //
-                // Note that when properties declared in Javascript constructors
-                // (marked by isReplaceableByMethod) conflict with another symbol, the property loses.
-                // Always. This allows the common Javascript pattern of overwriting a prototype method
-                // with an bound instance method of the same type: `this.method = this.method.bind(this)`
-                //
-                // If we created a new symbol, either because we didn't have a symbol with this name
-                // in the symbol table, or we conflicted with an existing symbol, then just add this
-                // node as the sole declaration of the new symbol.
-                //
-                // Otherwise, we'll be merging into a compatible existing symbol (for example when
-                // you have multiple 'vars' with the same name in the same container).  In this case
-                // just add this node into the declarations list of the symbol.
                 symbol = symbolTable.get(name);
-                if (includes & 2885600 /* Classifiable */) {
+                if (includes & 2885600) {
                     classifiableNames.set(name, true);
                 }
                 if (!symbol) {
-                    symbolTable.set(name, symbol = createSymbol(0 /* None */, name));
+                    symbolTable.set(name, symbol = createSymbol(0, name));
                     if (isReplaceableByMethod)
                         symbol.isReplaceableByMethod = true;
                 }
                 else if (isReplaceableByMethod && !symbol.isReplaceableByMethod) {
-                    // A symbol already exists, so don't add this as a declaration.
                     return symbol;
                 }
                 else if (symbol.flags & excludes) {
                     if (symbol.isReplaceableByMethod) {
-                        // Javascript constructor-declared symbols can be discarded in favor of
-                        // prototype symbols like methods.
-                        symbolTable.set(name, symbol = createSymbol(0 /* None */, name));
+                        symbolTable.set(name, symbol = createSymbol(0, name));
                     }
                     else {
                         if (ts.isNamedDeclaration(node)) {
                             node.name.parent = node;
                         }
-                        // Report errors every position with duplicate declaration
-                        // Report errors on previous encountered declarations
-                        var message_1 = symbol.flags & 2 /* BlockScopedVariable */
+                        var message_1 = symbol.flags & 2
                             ? ts.Diagnostics.Cannot_redeclare_block_scoped_variable_0
                             : ts.Diagnostics.Duplicate_identifier_0;
-                        if (symbol.flags & 384 /* Enum */ || includes & 384 /* Enum */) {
+                        if (symbol.flags & 384 || includes & 384) {
                             message_1 = ts.Diagnostics.Enum_declarations_can_only_merge_with_namespace_or_other_enum_declarations;
                         }
                         if (symbol.declarations && symbol.declarations.length) {
-                            // If the current node is a default export of some sort, then check if
-                            // there are any other default exports that we need to error on.
-                            // We'll know whether we have other default exports depending on if `symbol` already has a declaration list set.
                             if (isDefaultExport) {
                                 message_1 = ts.Diagnostics.A_module_cannot_have_multiple_default_exports;
                             }
                             else {
-                                // This is to properly report an error in the case "export default { }" is after export default of class declaration or function declaration.
-                                // Error on multiple export default in the following case:
-                                // 1. multiple export default of class declaration or function declaration by checking NodeFlags.Default
-                                // 2. multiple export default of export assignment. This one doesn't have NodeFlags.Default on (as export default doesn't considered as modifiers)
                                 if (symbol.declarations && symbol.declarations.length &&
-                                    (node.kind === 249 /* ExportAssignment */ && !node.isExportEquals)) {
+                                    (node.kind === 249 && !node.isExportEquals)) {
                                     message_1 = ts.Diagnostics.A_module_cannot_have_multiple_default_exports;
                                 }
                             }
@@ -25719,7 +20775,7 @@ var ts;
                             file.bindDiagnostics.push(createDiagnosticForNode(ts.getNameOfDeclaration(declaration) || declaration, message_1, getDisplayName(declaration)));
                         });
                         file.bindDiagnostics.push(createDiagnosticForNode(ts.getNameOfDeclaration(node) || node, message_1, getDisplayName(node)));
-                        symbol = createSymbol(0 /* None */, name);
+                        symbol = createSymbol(0, name);
                     }
                 }
             }
@@ -25733,127 +20789,85 @@ var ts;
             return symbol;
         }
         function declareModuleMember(node, symbolFlags, symbolExcludes) {
-            var hasExportModifier = ts.getCombinedModifierFlags(node) & 1 /* Export */;
-            if (symbolFlags & 2097152 /* Alias */) {
-                if (node.kind === 252 /* ExportSpecifier */ || (node.kind === 243 /* ImportEqualsDeclaration */ && hasExportModifier)) {
+            var hasExportModifier = ts.getCombinedModifierFlags(node) & 1;
+            if (symbolFlags & 2097152) {
+                if (node.kind === 252 || (node.kind === 243 && hasExportModifier)) {
                     return declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
                 }
                 else {
-                    return declareSymbol(container.locals, /*parent*/ undefined, node, symbolFlags, symbolExcludes);
+                    return declareSymbol(container.locals, undefined, node, symbolFlags, symbolExcludes);
                 }
             }
             else {
-                // Exported module members are given 2 symbols: A local symbol that is classified with an ExportValue flag,
-                // and an associated export symbol with all the correct flags set on it. There are 2 main reasons:
-                //
-                //   1. We treat locals and exports of the same name as mutually exclusive within a container.
-                //      That means the binder will issue a Duplicate Identifier error if you mix locals and exports
-                //      with the same name in the same container.
-                //      TODO: Make this a more specific error and decouple it from the exclusion logic.
-                //   2. When we checkIdentifier in the checker, we set its resolved symbol to the local symbol,
-                //      but return the export symbol (by calling getExportSymbolOfValueSymbolIfExported). That way
-                //      when the emitter comes back to it, it knows not to qualify the name if it was found in a containing scope.
-                // NOTE: Nested ambient modules always should go to to 'locals' table to prevent their automatic merge
-                //       during global merging in the checker. Why? The only case when ambient module is permitted inside another module is module augmentation
-                //       and this case is specially handled. Module augmentations should only be merged with original module definition
-                //       and should never be merged directly with other augmentation, and the latter case would be possible if automatic merge is allowed.
                 if (ts.isJSDocTypeAlias(node))
-                    ts.Debug.assert(ts.isInJavaScriptFile(node)); // We shouldn't add symbols for JSDoc nodes if not in a JS file.
-                if ((!ts.isAmbientModule(node) && (hasExportModifier || container.flags & 32 /* ExportContext */)) || ts.isJSDocTypeAlias(node)) {
-                    if (ts.hasModifier(node, 512 /* Default */) && !getDeclarationName(node)) {
-                        return declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes); // No local symbol for an unnamed default!
+                    ts.Debug.assert(ts.isInJavaScriptFile(node));
+                if ((!ts.isAmbientModule(node) && (hasExportModifier || container.flags & 32)) || ts.isJSDocTypeAlias(node)) {
+                    if (ts.hasModifier(node, 512) && !getDeclarationName(node)) {
+                        return declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
                     }
-                    var exportKind = symbolFlags & 67216319 /* Value */ ? 1048576 /* ExportValue */ : 0;
-                    var local = declareSymbol(container.locals, /*parent*/ undefined, node, exportKind, symbolExcludes);
+                    var exportKind = symbolFlags & 67216319 ? 1048576 : 0;
+                    var local = declareSymbol(container.locals, undefined, node, exportKind, symbolExcludes);
                     local.exportSymbol = declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
                     node.localSymbol = local;
                     return local;
                 }
                 else {
-                    return declareSymbol(container.locals, /*parent*/ undefined, node, symbolFlags, symbolExcludes);
+                    return declareSymbol(container.locals, undefined, node, symbolFlags, symbolExcludes);
                 }
             }
         }
-        // All container nodes are kept on a linked list in declaration order. This list is used by
-        // the getLocalNameOfContainer function in the type checker to validate that the local name
-        // used for a container is unique.
         function bindContainer(node, containerFlags) {
-            // Before we recurse into a node's children, we first save the existing parent, container
-            // and block-container.  Then after we pop out of processing the children, we restore
-            // these saved values.
             var saveContainer = container;
             var saveThisParentContainer = thisParentContainer;
             var savedBlockScopeContainer = blockScopeContainer;
-            // Depending on what kind of node this is, we may have to adjust the current container
-            // and block-container.   If the current node is a container, then it is automatically
-            // considered the current block-container as well.  Also, for containers that we know
-            // may contain locals, we eagerly initialize the .locals field. We do this because
-            // it's highly likely that the .locals will be needed to place some child in (for example,
-            // a parameter, or variable declaration).
-            //
-            // However, we do not proactively create the .locals for block-containers because it's
-            // totally normal and common for block-containers to never actually have a block-scoped
-            // variable in them.  We don't want to end up allocating an object for every 'block' we
-            // run into when most of them won't be necessary.
-            //
-            // Finally, if this is a block-container, then we clear out any existing .locals object
-            // it may contain within it.  This happens in incremental scenarios.  Because we can be
-            // reusing a node from a previous compilation, that node may have had 'locals' created
-            // for it.  We must clear this so we don't accidentally move any stale data forward from
-            // a previous compilation.
-            if (containerFlags & 1 /* IsContainer */) {
-                if (node.kind !== 193 /* ArrowFunction */) {
+            if (containerFlags & 1) {
+                if (node.kind !== 193) {
                     thisParentContainer = container;
                 }
                 container = blockScopeContainer = node;
-                if (containerFlags & 32 /* HasLocals */) {
+                if (containerFlags & 32) {
                     container.locals = ts.createSymbolTable();
                 }
                 addToContainerChain(container);
             }
-            else if (containerFlags & 2 /* IsBlockScopedContainer */) {
+            else if (containerFlags & 2) {
                 blockScopeContainer = node;
                 blockScopeContainer.locals = undefined;
             }
-            if (containerFlags & 4 /* IsControlFlowContainer */) {
+            if (containerFlags & 4) {
                 var saveCurrentFlow = currentFlow;
                 var saveBreakTarget = currentBreakTarget;
                 var saveContinueTarget = currentContinueTarget;
                 var saveReturnTarget = currentReturnTarget;
                 var saveActiveLabels = activeLabels;
                 var saveHasExplicitReturn = hasExplicitReturn;
-                var isIIFE = containerFlags & 16 /* IsFunctionExpression */ && !ts.hasModifier(node, 256 /* Async */) &&
+                var isIIFE = containerFlags & 16 && !ts.hasModifier(node, 256) &&
                     !node.asteriskToken && !!ts.getImmediatelyInvokedFunctionExpression(node);
-                // A non-async, non-generator IIFE is considered part of the containing control flow. Return statements behave
-                // similarly to break statements that exit to a label just past the statement body.
                 if (!isIIFE) {
-                    currentFlow = { flags: 2 /* Start */ };
-                    if (containerFlags & (16 /* IsFunctionExpression */ | 128 /* IsObjectLiteralOrClassExpressionMethod */)) {
+                    currentFlow = { flags: 2 };
+                    if (containerFlags & (16 | 128)) {
                         currentFlow.container = node;
                     }
                 }
-                // We create a return control flow graph for IIFEs and constructors. For constructors
-                // we use the return control flow graph in strict property intialization checks.
-                currentReturnTarget = isIIFE || node.kind === 155 /* Constructor */ ? createBranchLabel() : undefined;
+                currentReturnTarget = isIIFE || node.kind === 155 ? createBranchLabel() : undefined;
                 currentBreakTarget = undefined;
                 currentContinueTarget = undefined;
                 activeLabels = undefined;
                 hasExplicitReturn = false;
                 bindChildren(node);
-                // Reset all reachability check related flags on node (for incremental scenarios)
-                node.flags &= ~1408 /* ReachabilityAndEmitFlags */;
-                if (!(currentFlow.flags & 1 /* Unreachable */) && containerFlags & 8 /* IsFunctionLike */ && ts.nodeIsPresent(node.body)) {
-                    node.flags |= 128 /* HasImplicitReturn */;
+                node.flags &= ~1408;
+                if (!(currentFlow.flags & 1) && containerFlags & 8 && ts.nodeIsPresent(node.body)) {
+                    node.flags |= 128;
                     if (hasExplicitReturn)
-                        node.flags |= 256 /* HasExplicitReturn */;
+                        node.flags |= 256;
                 }
-                if (node.kind === 274 /* SourceFile */) {
+                if (node.kind === 274) {
                     node.flags |= emitFlags;
                 }
                 if (currentReturnTarget) {
                     addAntecedent(currentReturnTarget, currentFlow);
                     currentFlow = finishFlowLabel(currentReturnTarget);
-                    if (node.kind === 155 /* Constructor */) {
+                    if (node.kind === 155) {
                         node.returnFlowNode = currentFlow;
                     }
                 }
@@ -25866,10 +20880,10 @@ var ts;
                 activeLabels = saveActiveLabels;
                 hasExplicitReturn = saveHasExplicitReturn;
             }
-            else if (containerFlags & 64 /* IsInterface */) {
+            else if (containerFlags & 64) {
                 seenThisKeyword = false;
                 bindChildren(node);
-                node.flags = seenThisKeyword ? node.flags | 64 /* ContainsThis */ : node.flags & ~64 /* ContainsThis */;
+                node.flags = seenThisKeyword ? node.flags | 64 : node.flags & ~64;
             }
             else {
                 bindChildren(node);
@@ -25882,7 +20896,7 @@ var ts;
             if (skipTransformFlagAggregation) {
                 bindChildrenWorker(node);
             }
-            else if (node.transformFlags & 536870912 /* HasComputedFlags */) {
+            else if (node.transformFlags & 536870912) {
                 skipTransformFlagAggregation = true;
                 bindChildrenWorker(node);
                 skipTransformFlagAggregation = false;
@@ -25896,8 +20910,8 @@ var ts;
             }
         }
         function bindEachFunctionsFirst(nodes) {
-            bindEach(nodes, function (n) { return n.kind === 234 /* FunctionDeclaration */ ? bind(n) : undefined; });
-            bindEach(nodes, function (n) { return n.kind !== 234 /* FunctionDeclaration */ ? bind(n) : undefined; });
+            bindEach(nodes, function (n) { return n.kind === 234 ? bind(n) : undefined; });
+            bindEach(nodes, function (n) { return n.kind !== 234 ? bind(n) : undefined; });
         }
         function bindEach(nodes, bindFunction) {
             if (bindFunction === void 0) { bindFunction = bind; }
@@ -25909,14 +20923,14 @@ var ts;
             }
             else {
                 var savedSubtreeTransformFlags = subtreeTransformFlags;
-                subtreeTransformFlags = 0 /* None */;
-                var nodeArrayFlags = 0 /* None */;
-                for (var _i = 0, nodes_1 = nodes; _i < nodes_1.length; _i++) {
-                    var node = nodes_1[_i];
+                subtreeTransformFlags = 0;
+                var nodeArrayFlags = 0;
+                for (var _i = 0, nodes_2 = nodes; _i < nodes_2.length; _i++) {
+                    var node = nodes_2[_i];
                     bindFunction(node);
-                    nodeArrayFlags |= node.transformFlags & ~536870912 /* HasComputedFlags */;
+                    nodeArrayFlags |= node.transformFlags & ~536870912;
                 }
-                nodes.transformFlags = nodeArrayFlags | 536870912 /* HasComputedFlags */;
+                nodes.transformFlags = nodeArrayFlags | 536870912;
                 subtreeTransformFlags |= savedSubtreeTransformFlags;
             }
         }
@@ -25929,77 +20943,76 @@ var ts;
                 return;
             }
             switch (node.kind) {
-                case 219 /* WhileStatement */:
+                case 219:
                     bindWhileStatement(node);
                     break;
-                case 218 /* DoStatement */:
+                case 218:
                     bindDoStatement(node);
                     break;
-                case 220 /* ForStatement */:
+                case 220:
                     bindForStatement(node);
                     break;
-                case 221 /* ForInStatement */:
-                case 222 /* ForOfStatement */:
+                case 221:
+                case 222:
                     bindForInOrForOfStatement(node);
                     break;
-                case 217 /* IfStatement */:
+                case 217:
                     bindIfStatement(node);
                     break;
-                case 225 /* ReturnStatement */:
-                case 229 /* ThrowStatement */:
+                case 225:
+                case 229:
                     bindReturnOrThrow(node);
                     break;
-                case 224 /* BreakStatement */:
-                case 223 /* ContinueStatement */:
+                case 224:
+                case 223:
                     bindBreakOrContinueStatement(node);
                     break;
-                case 230 /* TryStatement */:
+                case 230:
                     bindTryStatement(node);
                     break;
-                case 227 /* SwitchStatement */:
+                case 227:
                     bindSwitchStatement(node);
                     break;
-                case 241 /* CaseBlock */:
+                case 241:
                     bindCaseBlock(node);
                     break;
-                case 266 /* CaseClause */:
+                case 266:
                     bindCaseClause(node);
                     break;
-                case 228 /* LabeledStatement */:
+                case 228:
                     bindLabeledStatement(node);
                     break;
-                case 198 /* PrefixUnaryExpression */:
+                case 198:
                     bindPrefixUnaryExpressionFlow(node);
                     break;
-                case 199 /* PostfixUnaryExpression */:
+                case 199:
                     bindPostfixUnaryExpressionFlow(node);
                     break;
-                case 200 /* BinaryExpression */:
+                case 200:
                     bindBinaryExpressionFlow(node);
                     break;
-                case 194 /* DeleteExpression */:
+                case 194:
                     bindDeleteExpressionFlow(node);
                     break;
-                case 201 /* ConditionalExpression */:
+                case 201:
                     bindConditionalExpressionFlow(node);
                     break;
-                case 232 /* VariableDeclaration */:
+                case 232:
                     bindVariableDeclarationFlow(node);
                     break;
-                case 187 /* CallExpression */:
+                case 187:
                     bindCallExpressionFlow(node);
                     break;
-                case 297 /* JSDocTypedefTag */:
-                case 292 /* JSDocCallbackTag */:
+                case 297:
+                case 292:
                     bindJSDocTypeAlias(node);
                     break;
-                // In source files and blocks, bind functions first to match hoisting that occurs at runtime
-                case 274 /* SourceFile */:
+                case 274:
                     bindEachFunctionsFirst(node.statements);
                     bind(node.endOfFileToken);
                     break;
-                case 213 /* Block */:
-                case 240 /* ModuleBlock */:
+                case 213:
+                case 240:
                     bindEachFunctionsFirst(node.statements);
                     break;
                 default:
@@ -26010,26 +21023,26 @@ var ts;
         }
         function isNarrowingExpression(expr) {
             switch (expr.kind) {
-                case 71 /* Identifier */:
-                case 99 /* ThisKeyword */:
-                case 185 /* PropertyAccessExpression */:
+                case 71:
+                case 99:
+                case 185:
                     return isNarrowableReference(expr);
-                case 187 /* CallExpression */:
+                case 187:
                     return hasNarrowableArgument(expr);
-                case 191 /* ParenthesizedExpression */:
+                case 191:
                     return isNarrowingExpression(expr.expression);
-                case 200 /* BinaryExpression */:
+                case 200:
                     return isNarrowingBinaryExpression(expr);
-                case 198 /* PrefixUnaryExpression */:
-                    return expr.operator === 51 /* ExclamationToken */ && isNarrowingExpression(expr.operand);
+                case 198:
+                    return expr.operator === 51 && isNarrowingExpression(expr.operand);
             }
             return false;
         }
         function isNarrowableReference(expr) {
-            return expr.kind === 71 /* Identifier */ ||
-                expr.kind === 99 /* ThisKeyword */ ||
-                expr.kind === 97 /* SuperKeyword */ ||
-                expr.kind === 185 /* PropertyAccessExpression */ && isNarrowableReference(expr.expression);
+            return expr.kind === 71 ||
+                expr.kind === 99 ||
+                expr.kind === 97 ||
+                expr.kind === 185 && isNarrowableReference(expr.expression);
         }
         function hasNarrowableArgument(expr) {
             if (expr.arguments) {
@@ -26040,7 +21053,7 @@ var ts;
                     }
                 }
             }
-            if (expr.expression.kind === 185 /* PropertyAccessExpression */ &&
+            if (expr.expression.kind === 185 &&
                 isNarrowableReference(expr.expression.expression)) {
                 return true;
             }
@@ -26054,32 +21067,32 @@ var ts;
         }
         function isNarrowingBinaryExpression(expr) {
             switch (expr.operatorToken.kind) {
-                case 58 /* EqualsToken */:
+                case 58:
                     return isNarrowableReference(expr.left);
-                case 32 /* EqualsEqualsToken */:
-                case 33 /* ExclamationEqualsToken */:
-                case 34 /* EqualsEqualsEqualsToken */:
-                case 35 /* ExclamationEqualsEqualsToken */:
+                case 32:
+                case 33:
+                case 34:
+                case 35:
                     return isNarrowableOperand(expr.left) || isNarrowableOperand(expr.right) ||
                         isNarrowingTypeofOperands(expr.right, expr.left) || isNarrowingTypeofOperands(expr.left, expr.right);
-                case 93 /* InstanceOfKeyword */:
+                case 93:
                     return isNarrowableOperand(expr.left);
-                case 92 /* InKeyword */:
+                case 92:
                     return isNarrowableInOperands(expr.left, expr.right);
-                case 26 /* CommaToken */:
+                case 26:
                     return isNarrowingExpression(expr.right);
             }
             return false;
         }
         function isNarrowableOperand(expr) {
             switch (expr.kind) {
-                case 191 /* ParenthesizedExpression */:
+                case 191:
                     return isNarrowableOperand(expr.expression);
-                case 200 /* BinaryExpression */:
+                case 200:
                     switch (expr.operatorToken.kind) {
-                        case 58 /* EqualsToken */:
+                        case 58:
                             return isNarrowableOperand(expr.left);
-                        case 26 /* CommaToken */:
+                        case 26:
                             return isNarrowableOperand(expr.right);
                     }
             }
@@ -26087,35 +21100,34 @@ var ts;
         }
         function createBranchLabel() {
             return {
-                flags: 4 /* BranchLabel */,
+                flags: 4,
                 antecedents: undefined
             };
         }
         function createLoopLabel() {
             return {
-                flags: 8 /* LoopLabel */,
+                flags: 8,
                 antecedents: undefined
             };
         }
         function setFlowNodeReferenced(flow) {
-            // On first reference we set the Referenced flag, thereafter we set the Shared flag
-            flow.flags |= flow.flags & 512 /* Referenced */ ? 1024 /* Shared */ : 512 /* Referenced */;
+            flow.flags |= flow.flags & 512 ? 1024 : 512;
         }
         function addAntecedent(label, antecedent) {
-            if (!(antecedent.flags & 1 /* Unreachable */) && !ts.contains(label.antecedents, antecedent)) {
+            if (!(antecedent.flags & 1) && !ts.contains(label.antecedents, antecedent)) {
                 (label.antecedents || (label.antecedents = [])).push(antecedent);
                 setFlowNodeReferenced(antecedent);
             }
         }
         function createFlowCondition(flags, antecedent, expression) {
-            if (antecedent.flags & 1 /* Unreachable */) {
+            if (antecedent.flags & 1) {
                 return antecedent;
             }
             if (!expression) {
-                return flags & 32 /* TrueCondition */ ? antecedent : unreachableFlow;
+                return flags & 32 ? antecedent : unreachableFlow;
             }
-            if (expression.kind === 101 /* TrueKeyword */ && flags & 64 /* FalseCondition */ ||
-                expression.kind === 86 /* FalseKeyword */ && flags & 32 /* TrueCondition */) {
+            if (expression.kind === 101 && flags & 64 ||
+                expression.kind === 86 && flags & 32) {
                 return unreachableFlow;
             }
             if (!isNarrowingExpression(expression)) {
@@ -26129,15 +21141,15 @@ var ts;
                 return antecedent;
             }
             setFlowNodeReferenced(antecedent);
-            return { flags: 128 /* SwitchClause */, switchStatement: switchStatement, clauseStart: clauseStart, clauseEnd: clauseEnd, antecedent: antecedent };
+            return { flags: 128, switchStatement: switchStatement, clauseStart: clauseStart, clauseEnd: clauseEnd, antecedent: antecedent };
         }
         function createFlowAssignment(antecedent, node) {
             setFlowNodeReferenced(antecedent);
-            return { flags: 16 /* Assignment */, antecedent: antecedent, node: node };
+            return { flags: 16, antecedent: antecedent, node: node };
         }
         function createFlowArrayMutation(antecedent, node) {
             setFlowNodeReferenced(antecedent);
-            var res = { flags: 256 /* ArrayMutation */, antecedent: antecedent, node: node };
+            var res = { flags: 256, antecedent: antecedent, node: node };
             return res;
         }
         function finishFlowLabel(flow) {
@@ -26153,34 +21165,34 @@ var ts;
         function isStatementCondition(node) {
             var parent = node.parent;
             switch (parent.kind) {
-                case 217 /* IfStatement */:
-                case 219 /* WhileStatement */:
-                case 218 /* DoStatement */:
+                case 217:
+                case 219:
+                case 218:
                     return parent.expression === node;
-                case 220 /* ForStatement */:
-                case 201 /* ConditionalExpression */:
+                case 220:
+                case 201:
                     return parent.condition === node;
             }
             return false;
         }
         function isLogicalExpression(node) {
             while (true) {
-                if (node.kind === 191 /* ParenthesizedExpression */) {
+                if (node.kind === 191) {
                     node = node.expression;
                 }
-                else if (node.kind === 198 /* PrefixUnaryExpression */ && node.operator === 51 /* ExclamationToken */) {
+                else if (node.kind === 198 && node.operator === 51) {
                     node = node.operand;
                 }
                 else {
-                    return node.kind === 200 /* BinaryExpression */ && (node.operatorToken.kind === 53 /* AmpersandAmpersandToken */ ||
-                        node.operatorToken.kind === 54 /* BarBarToken */);
+                    return node.kind === 200 && (node.operatorToken.kind === 53 ||
+                        node.operatorToken.kind === 54);
                 }
             }
         }
         function isTopLevelLogicalExpression(node) {
-            while (node.parent.kind === 191 /* ParenthesizedExpression */ ||
-                node.parent.kind === 198 /* PrefixUnaryExpression */ &&
-                    node.parent.operator === 51 /* ExclamationToken */) {
+            while (node.parent.kind === 191 ||
+                node.parent.kind === 198 &&
+                    node.parent.operator === 51) {
                 node = node.parent;
             }
             return !isStatementCondition(node) && !isLogicalExpression(node.parent);
@@ -26194,8 +21206,8 @@ var ts;
             currentTrueTarget = saveTrueTarget;
             currentFalseTarget = saveFalseTarget;
             if (!node || !isLogicalExpression(node)) {
-                addAntecedent(trueTarget, createFlowCondition(32 /* TrueCondition */, currentFlow, node));
-                addAntecedent(falseTarget, createFlowCondition(64 /* FalseCondition */, currentFlow, node));
+                addAntecedent(trueTarget, createFlowCondition(32, currentFlow, node));
+                addAntecedent(falseTarget, createFlowCondition(64, currentFlow, node));
             }
         }
         function bindIterativeStatement(node, breakTarget, continueTarget) {
@@ -26221,11 +21233,9 @@ var ts;
         }
         function bindDoStatement(node) {
             var preDoLabel = createLoopLabel();
-            var enclosingLabeledStatement = node.parent.kind === 228 /* LabeledStatement */
+            var enclosingLabeledStatement = node.parent.kind === 228
                 ? ts.lastOrUndefined(activeLabels)
                 : undefined;
-            // if do statement is wrapped in labeled statement then target labels for break/continue with or without
-            // label should be the same
             var preConditionLabel = enclosingLabeledStatement ? enclosingLabeledStatement.continueTarget : createBranchLabel();
             var postDoLabel = enclosingLabeledStatement ? enclosingLabeledStatement.breakTarget : createBranchLabel();
             addAntecedent(preDoLabel, currentFlow);
@@ -26255,13 +21265,13 @@ var ts;
             var postLoopLabel = createBranchLabel();
             addAntecedent(preLoopLabel, currentFlow);
             currentFlow = preLoopLabel;
-            if (node.kind === 222 /* ForOfStatement */) {
+            if (node.kind === 222) {
                 bind(node.awaitModifier);
             }
             bind(node.expression);
             addAntecedent(postLoopLabel, currentFlow);
             bind(node.initializer);
-            if (node.initializer.kind !== 233 /* VariableDeclarationList */) {
+            if (node.initializer.kind !== 233) {
                 bindAssignmentTargetFlow(node.initializer);
             }
             bindIterativeStatement(node.statement, postLoopLabel, preLoopLabel);
@@ -26283,7 +21293,7 @@ var ts;
         }
         function bindReturnOrThrow(node) {
             bind(node.expression);
-            if (node.kind === 225 /* ReturnStatement */) {
+            if (node.kind === 225) {
                 hasExplicitReturn = true;
                 if (currentReturnTarget) {
                     addAntecedent(currentReturnTarget, currentFlow);
@@ -26303,7 +21313,7 @@ var ts;
             return undefined;
         }
         function bindBreakOrContinueFlow(node, breakTarget, continueTarget) {
-            var flowLabel = node.kind === 224 /* BreakStatement */ ? breakTarget : continueTarget;
+            var flowLabel = node.kind === 224 ? breakTarget : continueTarget;
             if (flowLabel) {
                 addAntecedent(flowLabel, currentFlow);
                 currentFlow = unreachableFlow;
@@ -26325,7 +21335,6 @@ var ts;
         function bindTryStatement(node) {
             var preFinallyLabel = createBranchLabel();
             var preTryFlow = currentFlow;
-            // TODO: Every statement in try block is potentially an exit point!
             bind(node.tryBlock);
             addAntecedent(preFinallyLabel, currentFlow);
             var flowAfterTry = currentFlow;
@@ -26337,51 +21346,19 @@ var ts;
                 flowAfterCatch = currentFlow;
             }
             if (node.finallyBlock) {
-                // in finally flow is combined from pre-try/flow from try/flow from catch
-                // pre-flow is necessary to make sure that finally is reachable even if finally flows in both try and finally blocks are unreachable
-                // also for finally blocks we inject two extra edges into the flow graph.
-                // first -> edge that connects pre-try flow with the label at the beginning of the finally block, it has lock associated with it
-                // second -> edge that represents post-finally flow.
-                // these edges are used in following scenario:
-                // let a; (1)
-                // try { a = someOperation(); (2)}
-                // finally { (3) console.log(a) } (4)
-                // (5) a
-                // flow graph for this case looks roughly like this (arrows show ):
-                // (1-pre-try-flow) <--.. <-- (2-post-try-flow)
-                //  ^                                ^
-                //  |*****(3-pre-finally-label) -----|
-                //                ^
-                //                |-- ... <-- (4-post-finally-label) <--- (5)
-                // In case when we walk the flow starting from inside the finally block we want to take edge '*****' into account
-                // since it ensures that finally is always reachable. However when we start outside the finally block and go through label (5)
-                // then edge '*****' should be discarded because label 4 is only reachable if post-finally label-4 is reachable
-                // Simply speaking code inside finally block is treated as reachable as pre-try-flow
-                // since we conservatively assume that any line in try block can throw or return in which case we'll enter finally.
-                // However code after finally is reachable only if control flow was not abrupted in try/catch or finally blocks - it should be composed from
-                // final flows of these blocks without taking pre-try flow into account.
-                //
-                // extra edges that we inject allows to control this behavior
-                // if when walking the flow we step on post-finally edge - we can mark matching pre-finally edge as locked so it will be skipped.
-                var preFinallyFlow = { flags: 2048 /* PreFinally */, antecedent: preTryFlow, lock: {} };
+                var preFinallyFlow = { flags: 2048, antecedent: preTryFlow, lock: {} };
                 addAntecedent(preFinallyLabel, preFinallyFlow);
                 currentFlow = finishFlowLabel(preFinallyLabel);
                 bind(node.finallyBlock);
-                // if flow after finally is unreachable - keep it
-                // otherwise check if flows after try and after catch are unreachable
-                // if yes - convert current flow to unreachable
-                // i.e.
-                // try { return "1" } finally { console.log(1); }
-                // console.log(2); // this line should be unreachable even if flow falls out of finally block
-                if (!(currentFlow.flags & 1 /* Unreachable */)) {
-                    if ((flowAfterTry.flags & 1 /* Unreachable */) && (flowAfterCatch.flags & 1 /* Unreachable */)) {
+                if (!(currentFlow.flags & 1)) {
+                    if ((flowAfterTry.flags & 1) && (flowAfterCatch.flags & 1)) {
                         currentFlow = flowAfterTry === reportedUnreachableFlow || flowAfterCatch === reportedUnreachableFlow
                             ? reportedUnreachableFlow
                             : unreachableFlow;
                     }
                 }
-                if (!(currentFlow.flags & 1 /* Unreachable */)) {
-                    var afterFinallyFlow = { flags: 4096 /* AfterFinally */, antecedent: currentFlow };
+                if (!(currentFlow.flags & 1)) {
+                    var afterFinallyFlow = { flags: 4096, antecedent: currentFlow };
                     preFinallyFlow.lock = afterFinallyFlow;
                     currentFlow = afterFinallyFlow;
                 }
@@ -26399,9 +21376,7 @@ var ts;
             preSwitchCaseFlow = currentFlow;
             bind(node.caseBlock);
             addAntecedent(postSwitchLabel, currentFlow);
-            var hasDefault = ts.forEach(node.caseBlock.clauses, function (c) { return c.kind === 267 /* DefaultClause */; });
-            // We mark a switch statement as possibly exhaustive if it has no default clause and if all
-            // case clauses have unreachable end points (e.g. they all return).
+            var hasDefault = ts.forEach(node.caseBlock.clauses, function (c) { return c.kind === 267; });
             node.possiblyExhaustive = !hasDefault && !postSwitchLabel.antecedents;
             if (!hasDefault) {
                 addAntecedent(postSwitchLabel, createFlowSwitchClause(preSwitchCaseFlow, node, 0, 0));
@@ -26429,11 +21404,11 @@ var ts;
                 var clause = clauses[i];
                 bind(clause);
                 fallthroughFlow = currentFlow;
-                if (!(currentFlow.flags & 1 /* Unreachable */) && i !== clauses.length - 1 && options.noFallthroughCasesInSwitch) {
+                if (!(currentFlow.flags & 1) && i !== clauses.length - 1 && options.noFallthroughCasesInSwitch) {
                     errorOnFirstToken(clause, ts.Diagnostics.Fallthrough_case_in_switch);
                 }
             }
-            clauses.transformFlags = subtreeTransformFlags | 536870912 /* HasComputedFlags */;
+            clauses.transformFlags = subtreeTransformFlags | 536870912;
             subtreeTransformFlags |= savedSubtreeTransformFlags;
         }
         function bindCaseClause(node) {
@@ -26467,14 +21442,13 @@ var ts;
             if (!activeLabel.referenced && !options.allowUnusedLabels) {
                 errorOrSuggestionOnFirstToken(ts.unusedLabelIsError(options), node, ts.Diagnostics.Unused_label);
             }
-            if (!node.statement || node.statement.kind !== 218 /* DoStatement */) {
-                // do statement sets current flow inside bindDoStatement
+            if (!node.statement || node.statement.kind !== 218) {
                 addAntecedent(postStatementLabel, currentFlow);
                 currentFlow = finishFlowLabel(postStatementLabel);
             }
         }
         function bindDestructuringTargetFlow(node) {
-            if (node.kind === 200 /* BinaryExpression */ && node.operatorToken.kind === 58 /* EqualsToken */) {
+            if (node.kind === 200 && node.operatorToken.kind === 58) {
                 bindAssignmentTargetFlow(node.left);
             }
             else {
@@ -26485,10 +21459,10 @@ var ts;
             if (isNarrowableReference(node)) {
                 currentFlow = createFlowAssignment(currentFlow, node);
             }
-            else if (node.kind === 183 /* ArrayLiteralExpression */) {
+            else if (node.kind === 183) {
                 for (var _i = 0, _a = node.elements; _i < _a.length; _i++) {
                     var e = _a[_i];
-                    if (e.kind === 204 /* SpreadElement */) {
+                    if (e.kind === 204) {
                         bindAssignmentTargetFlow(e.expression);
                     }
                     else {
@@ -26496,16 +21470,16 @@ var ts;
                     }
                 }
             }
-            else if (node.kind === 184 /* ObjectLiteralExpression */) {
+            else if (node.kind === 184) {
                 for (var _b = 0, _c = node.properties; _b < _c.length; _b++) {
                     var p = _c[_b];
-                    if (p.kind === 270 /* PropertyAssignment */) {
+                    if (p.kind === 270) {
                         bindDestructuringTargetFlow(p.initializer);
                     }
-                    else if (p.kind === 271 /* ShorthandPropertyAssignment */) {
+                    else if (p.kind === 271) {
                         bindAssignmentTargetFlow(p.name);
                     }
-                    else if (p.kind === 272 /* SpreadAssignment */) {
+                    else if (p.kind === 272) {
                         bindAssignmentTargetFlow(p.expression);
                     }
                 }
@@ -26513,7 +21487,7 @@ var ts;
         }
         function bindLogicalExpression(node, trueTarget, falseTarget) {
             var preRightLabel = createBranchLabel();
-            if (node.operatorToken.kind === 53 /* AmpersandAmpersandToken */) {
+            if (node.operatorToken.kind === 53) {
                 bindCondition(node.left, preRightLabel, falseTarget);
             }
             else {
@@ -26524,7 +21498,7 @@ var ts;
             bindCondition(node.right, trueTarget, falseTarget);
         }
         function bindPrefixUnaryExpressionFlow(node) {
-            if (node.operator === 51 /* ExclamationToken */) {
+            if (node.operator === 51) {
                 var saveTrueTarget = currentTrueTarget;
                 currentTrueTarget = currentFalseTarget;
                 currentFalseTarget = saveTrueTarget;
@@ -26534,20 +21508,20 @@ var ts;
             }
             else {
                 bindEachChild(node);
-                if (node.operator === 43 /* PlusPlusToken */ || node.operator === 44 /* MinusMinusToken */) {
+                if (node.operator === 43 || node.operator === 44) {
                     bindAssignmentTargetFlow(node.operand);
                 }
             }
         }
         function bindPostfixUnaryExpressionFlow(node) {
             bindEachChild(node);
-            if (node.operator === 43 /* PlusPlusToken */ || node.operator === 44 /* MinusMinusToken */) {
+            if (node.operator === 43 || node.operator === 44) {
                 bindAssignmentTargetFlow(node.operand);
             }
         }
         function bindBinaryExpressionFlow(node) {
             var operator = node.operatorToken.kind;
-            if (operator === 53 /* AmpersandAmpersandToken */ || operator === 54 /* BarBarToken */) {
+            if (operator === 53 || operator === 54) {
                 if (isTopLevelLogicalExpression(node)) {
                     var postExpressionLabel = createBranchLabel();
                     bindLogicalExpression(node, postExpressionLabel, postExpressionLabel);
@@ -26561,7 +21535,7 @@ var ts;
                 bindEachChild(node);
                 if (ts.isAssignmentOperator(operator) && !ts.isAssignmentTarget(node)) {
                     bindAssignmentTargetFlow(node.left);
-                    if (operator === 58 /* EqualsToken */ && node.left.kind === 186 /* ElementAccessExpression */) {
+                    if (operator === 58 && node.left.kind === 186) {
                         var elementAccess = node.left;
                         if (isNarrowableOperand(elementAccess.expression)) {
                             currentFlow = createFlowArrayMutation(currentFlow, node);
@@ -26572,7 +21546,7 @@ var ts;
         }
         function bindDeleteExpressionFlow(node) {
             bindEachChild(node);
-            if (node.expression.kind === 185 /* PropertyAccessExpression */) {
+            if (node.expression.kind === 185) {
                 bindAssignmentTargetFlow(node.expression);
             }
         }
@@ -26615,14 +21589,11 @@ var ts;
             }
         }
         function bindCallExpressionFlow(node) {
-            // If the target of the call expression is a function expression or arrow function we have
-            // an immediately invoked function expression (IIFE). Initialize the flowNode property to
-            // the current control flow (which includes evaluation of the IIFE arguments).
             var expr = node.expression;
-            while (expr.kind === 191 /* ParenthesizedExpression */) {
+            while (expr.kind === 191) {
                 expr = expr.expression;
             }
-            if (expr.kind === 192 /* FunctionExpression */ || expr.kind === 193 /* ArrowFunction */) {
+            if (expr.kind === 192 || expr.kind === 193) {
                 bindEach(node.typeArguments);
                 bindEach(node.arguments);
                 bind(node.expression);
@@ -26630,7 +21601,7 @@ var ts;
             else {
                 bindEachChild(node);
             }
-            if (node.expression.kind === 185 /* PropertyAccessExpression */) {
+            if (node.expression.kind === 185) {
                 var propertyAccess = node.expression;
                 if (isNarrowableOperand(propertyAccess.expression) && ts.isPushOrUnshiftIdentifier(propertyAccess.name)) {
                     currentFlow = createFlowArrayMutation(currentFlow, node);
@@ -26639,73 +21610,56 @@ var ts;
         }
         function getContainerFlags(node) {
             switch (node.kind) {
-                case 205 /* ClassExpression */:
-                case 235 /* ClassDeclaration */:
-                case 238 /* EnumDeclaration */:
-                case 184 /* ObjectLiteralExpression */:
-                case 166 /* TypeLiteral */:
-                case 287 /* JSDocTypeLiteral */:
-                case 263 /* JsxAttributes */:
-                    return 1 /* IsContainer */;
-                case 236 /* InterfaceDeclaration */:
-                    return 1 /* IsContainer */ | 64 /* IsInterface */;
-                case 239 /* ModuleDeclaration */:
-                case 237 /* TypeAliasDeclaration */:
-                case 177 /* MappedType */:
-                    return 1 /* IsContainer */ | 32 /* HasLocals */;
-                case 274 /* SourceFile */:
-                    return 1 /* IsContainer */ | 4 /* IsControlFlowContainer */ | 32 /* HasLocals */;
-                case 154 /* MethodDeclaration */:
+                case 205:
+                case 235:
+                case 238:
+                case 184:
+                case 166:
+                case 287:
+                case 263:
+                    return 1;
+                case 236:
+                    return 1 | 64;
+                case 239:
+                case 237:
+                case 177:
+                    return 1 | 32;
+                case 274:
+                    return 1 | 4 | 32;
+                case 154:
                     if (ts.isObjectLiteralOrClassExpressionMethod(node)) {
-                        return 1 /* IsContainer */ | 4 /* IsControlFlowContainer */ | 32 /* HasLocals */ | 8 /* IsFunctionLike */ | 128 /* IsObjectLiteralOrClassExpressionMethod */;
-                    }
-                // falls through
-                case 155 /* Constructor */:
-                case 234 /* FunctionDeclaration */:
-                case 153 /* MethodSignature */:
-                case 156 /* GetAccessor */:
-                case 157 /* SetAccessor */:
-                case 158 /* CallSignature */:
-                case 288 /* JSDocSignature */:
-                case 284 /* JSDocFunctionType */:
-                case 163 /* FunctionType */:
-                case 159 /* ConstructSignature */:
-                case 160 /* IndexSignature */:
-                case 164 /* ConstructorType */:
-                    return 1 /* IsContainer */ | 4 /* IsControlFlowContainer */ | 32 /* HasLocals */ | 8 /* IsFunctionLike */;
-                case 192 /* FunctionExpression */:
-                case 193 /* ArrowFunction */:
-                    return 1 /* IsContainer */ | 4 /* IsControlFlowContainer */ | 32 /* HasLocals */ | 8 /* IsFunctionLike */ | 16 /* IsFunctionExpression */;
-                case 240 /* ModuleBlock */:
-                    return 4 /* IsControlFlowContainer */;
-                case 152 /* PropertyDeclaration */:
-                    return node.initializer ? 4 /* IsControlFlowContainer */ : 0;
-                case 269 /* CatchClause */:
-                case 220 /* ForStatement */:
-                case 221 /* ForInStatement */:
-                case 222 /* ForOfStatement */:
-                case 241 /* CaseBlock */:
-                    return 2 /* IsBlockScopedContainer */;
-                case 213 /* Block */:
-                    // do not treat blocks directly inside a function as a block-scoped-container.
-                    // Locals that reside in this block should go to the function locals. Otherwise 'x'
-                    // would not appear to be a redeclaration of a block scoped local in the following
-                    // example:
-                    //
-                    //      function foo() {
-                    //          var x;
-                    //          let x;
-                    //      }
-                    //
-                    // If we placed 'var x' into the function locals and 'let x' into the locals of
-                    // the block, then there would be no collision.
-                    //
-                    // By not creating a new block-scoped-container here, we ensure that both 'var x'
-                    // and 'let x' go into the Function-container's locals, and we do get a collision
-                    // conflict.
-                    return ts.isFunctionLike(node.parent) ? 0 /* None */ : 2 /* IsBlockScopedContainer */;
-            }
-            return 0 /* None */;
+                        return 1 | 4 | 32 | 8 | 128;
+                    }
+                case 155:
+                case 234:
+                case 153:
+                case 156:
+                case 157:
+                case 158:
+                case 288:
+                case 284:
+                case 163:
+                case 159:
+                case 160:
+                case 164:
+                    return 1 | 4 | 32 | 8;
+                case 192:
+                case 193:
+                    return 1 | 4 | 32 | 8 | 16;
+                case 240:
+                    return 4;
+                case 152:
+                    return node.initializer ? 4 : 0;
+                case 269:
+                case 220:
+                case 221:
+                case 222:
+                case 241:
+                    return 2;
+                case 213:
+                    return ts.isFunctionLike(node.parent) ? 0 : 2;
+            }
+            return 0;
         }
         function addToContainerChain(next) {
             if (lastContainer) {
@@ -26715,74 +21669,59 @@ var ts;
         }
         function declareSymbolAndAddToSymbolTable(node, symbolFlags, symbolExcludes) {
             switch (container.kind) {
-                // Modules, source files, and classes need specialized handling for how their
-                // members are declared (for example, a member of a class will go into a specific
-                // symbol table depending on if it is static or not). We defer to specialized
-                // handlers to take care of declaring these child members.
-                case 239 /* ModuleDeclaration */:
+                case 239:
                     return declareModuleMember(node, symbolFlags, symbolExcludes);
-                case 274 /* SourceFile */:
+                case 274:
                     return declareSourceFileMember(node, symbolFlags, symbolExcludes);
-                case 205 /* ClassExpression */:
-                case 235 /* ClassDeclaration */:
+                case 205:
+                case 235:
                     return declareClassMember(node, symbolFlags, symbolExcludes);
-                case 238 /* EnumDeclaration */:
+                case 238:
                     return declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
-                case 166 /* TypeLiteral */:
-                case 287 /* JSDocTypeLiteral */:
-                case 184 /* ObjectLiteralExpression */:
-                case 236 /* InterfaceDeclaration */:
-                case 263 /* JsxAttributes */:
-                    // Interface/Object-types always have their children added to the 'members' of
-                    // their container. They are only accessible through an instance of their
-                    // container, and are never in scope otherwise (even inside the body of the
-                    // object / type / interface declaring them). An exception is type parameters,
-                    // which are in scope without qualification (similar to 'locals').
+                case 166:
+                case 287:
+                case 184:
+                case 236:
+                case 263:
                     return declareSymbol(container.symbol.members, container.symbol, node, symbolFlags, symbolExcludes);
-                case 163 /* FunctionType */:
-                case 164 /* ConstructorType */:
-                case 158 /* CallSignature */:
-                case 159 /* ConstructSignature */:
-                case 288 /* JSDocSignature */:
-                case 160 /* IndexSignature */:
-                case 154 /* MethodDeclaration */:
-                case 153 /* MethodSignature */:
-                case 155 /* Constructor */:
-                case 156 /* GetAccessor */:
-                case 157 /* SetAccessor */:
-                case 234 /* FunctionDeclaration */:
-                case 192 /* FunctionExpression */:
-                case 193 /* ArrowFunction */:
-                case 284 /* JSDocFunctionType */:
-                case 297 /* JSDocTypedefTag */:
-                case 292 /* JSDocCallbackTag */:
-                case 237 /* TypeAliasDeclaration */:
-                case 177 /* MappedType */:
-                    // All the children of these container types are never visible through another
-                    // symbol (i.e. through another symbol's 'exports' or 'members').  Instead,
-                    // they're only accessed 'lexically' (i.e. from code that exists underneath
-                    // their container in the tree). To accomplish this, we simply add their declared
-                    // symbol to the 'locals' of the container.  These symbols can then be found as
-                    // the type checker walks up the containers, checking them for matching names.
-                    return declareSymbol(container.locals, /*parent*/ undefined, node, symbolFlags, symbolExcludes);
+                case 163:
+                case 164:
+                case 158:
+                case 159:
+                case 288:
+                case 160:
+                case 154:
+                case 153:
+                case 155:
+                case 156:
+                case 157:
+                case 234:
+                case 192:
+                case 193:
+                case 284:
+                case 297:
+                case 292:
+                case 237:
+                case 177:
+                    return declareSymbol(container.locals, undefined, node, symbolFlags, symbolExcludes);
             }
         }
         function declareClassMember(node, symbolFlags, symbolExcludes) {
-            return ts.hasModifier(node, 32 /* Static */)
+            return ts.hasModifier(node, 32)
                 ? declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes)
                 : declareSymbol(container.symbol.members, container.symbol, node, symbolFlags, symbolExcludes);
         }
         function declareSourceFileMember(node, symbolFlags, symbolExcludes) {
             return ts.isExternalModule(file)
                 ? declareModuleMember(node, symbolFlags, symbolExcludes)
-                : declareSymbol(file.locals, /*parent*/ undefined, node, symbolFlags, symbolExcludes);
+                : declareSymbol(file.locals, undefined, node, symbolFlags, symbolExcludes);
         }
         function hasExportDeclarations(node) {
-            var body = node.kind === 274 /* SourceFile */ ? node : node.body;
-            if (body && (body.kind === 274 /* SourceFile */ || body.kind === 240 /* ModuleBlock */)) {
+            var body = node.kind === 274 ? node : node.body;
+            if (body && (body.kind === 274 || body.kind === 240)) {
                 for (var _i = 0, _a = body.statements; _i < _a.length; _i++) {
                     var stat = _a[_i];
-                    if (stat.kind === 250 /* ExportDeclaration */ || stat.kind === 249 /* ExportAssignment */) {
+                    if (stat.kind === 250 || stat.kind === 249) {
                         return true;
                     }
                 }
@@ -26790,19 +21729,17 @@ var ts;
             return false;
         }
         function setExportContextFlag(node) {
-            // A declaration source file or ambient module declaration that contains no export declarations (but possibly regular
-            // declarations with export modifiers) is an export context in which declarations are implicitly exported.
-            if (node.flags & 4194304 /* Ambient */ && !hasExportDeclarations(node)) {
-                node.flags |= 32 /* ExportContext */;
+            if (node.flags & 4194304 && !hasExportDeclarations(node)) {
+                node.flags |= 32;
             }
             else {
-                node.flags &= ~32 /* ExportContext */;
+                node.flags &= ~32;
             }
         }
         function bindModuleDeclaration(node) {
             setExportContextFlag(node);
             if (ts.isAmbientModule(node)) {
-                if (ts.hasModifier(node, 1 /* Export */)) {
+                if (ts.hasModifier(node, 1)) {
                     errorOnFirstToken(node, ts.Diagnostics.export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always_visible);
                 }
                 if (ts.isModuleAugmentationExternal(node)) {
@@ -26810,7 +21747,7 @@ var ts;
                 }
                 else {
                     var pattern = void 0;
-                    if (node.name.kind === 9 /* StringLiteral */) {
+                    if (node.name.kind === 9) {
                         var text = node.name.text;
                         if (ts.hasZeroOrOneAsteriskCharacter(text)) {
                             pattern = ts.tryParsePattern(text);
@@ -26819,90 +21756,68 @@ var ts;
                             errorOnFirstToken(node.name, ts.Diagnostics.Pattern_0_can_have_at_most_one_Asterisk_character, text);
                         }
                     }
-                    var symbol = declareSymbolAndAddToSymbolTable(node, 512 /* ValueModule */, 67215503 /* ValueModuleExcludes */);
+                    var symbol = declareSymbolAndAddToSymbolTable(node, 512, 67215503);
                     file.patternAmbientModules = ts.append(file.patternAmbientModules, pattern && { pattern: pattern, symbol: symbol });
                 }
             }
             else {
                 var state = declareModuleSymbol(node);
-                if (state !== 0 /* NonInstantiated */) {
+                if (state !== 0) {
                     var symbol = node.symbol;
-                    // if module was already merged with some function, class or non-const enum, treat it as non-const-enum-only
-                    symbol.constEnumOnlyModule = (!(symbol.flags & (16 /* Function */ | 32 /* Class */ | 256 /* RegularEnum */)))
-                        // Current must be `const enum` only
-                        && state === 2 /* ConstEnumOnly */
-                        // Can't have been set to 'false' in a previous merged symbol. ('undefined' OK)
+                    symbol.constEnumOnlyModule = (!(symbol.flags & (16 | 32 | 256)))
+                        && state === 2
                         && symbol.constEnumOnlyModule !== false;
                 }
             }
         }
         function declareModuleSymbol(node) {
             var state = getModuleInstanceState(node);
-            var instantiated = state !== 0 /* NonInstantiated */;
-            declareSymbolAndAddToSymbolTable(node, instantiated ? 512 /* ValueModule */ : 1024 /* NamespaceModule */, instantiated ? 67215503 /* ValueModuleExcludes */ : 0 /* NamespaceModuleExcludes */);
+            var instantiated = state !== 0;
+            declareSymbolAndAddToSymbolTable(node, instantiated ? 512 : 1024, instantiated ? 67215503 : 0);
             return state;
         }
         function bindFunctionOrConstructorType(node) {
-            // For a given function symbol "<...>(...) => T" we want to generate a symbol identical
-            // to the one we would get for: { <...>(...): T }
-            //
-            // We do that by making an anonymous type literal symbol, and then setting the function
-            // symbol as its sole member. To the rest of the system, this symbol will be indistinguishable
-            // from an actual type literal symbol you would have gotten had you used the long form.
-            var symbol = createSymbol(131072 /* Signature */, getDeclarationName(node)); // TODO: GH#18217
-            addDeclarationToSymbol(symbol, node, 131072 /* Signature */);
-            var typeLiteralSymbol = createSymbol(2048 /* TypeLiteral */, "__type" /* Type */);
-            addDeclarationToSymbol(typeLiteralSymbol, node, 2048 /* TypeLiteral */);
+            var symbol = createSymbol(131072, getDeclarationName(node));
+            addDeclarationToSymbol(symbol, node, 131072);
+            var typeLiteralSymbol = createSymbol(2048, "__type");
+            addDeclarationToSymbol(typeLiteralSymbol, node, 2048);
             typeLiteralSymbol.members = ts.createSymbolTable();
             typeLiteralSymbol.members.set(symbol.escapedName, symbol);
         }
         function bindObjectLiteralExpression(node) {
-            var ElementKind;
-            (function (ElementKind) {
-                ElementKind[ElementKind["Property"] = 1] = "Property";
-                ElementKind[ElementKind["Accessor"] = 2] = "Accessor";
-            })(ElementKind || (ElementKind = {}));
             if (inStrictMode) {
                 var seen = ts.createUnderscoreEscapedMap();
                 for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
                     var prop = _a[_i];
-                    if (prop.kind === 272 /* SpreadAssignment */ || prop.name.kind !== 71 /* Identifier */) {
+                    if (prop.kind === 272 || prop.name.kind !== 71) {
                         continue;
                     }
                     var identifier = prop.name;
-                    // ECMA-262 11.1.5 Object Initializer
-                    // If previous is not undefined then throw a SyntaxError exception if any of the following conditions are true
-                    // a.This production is contained in strict code and IsDataDescriptor(previous) is true and
-                    // IsDataDescriptor(propId.descriptor) is true.
-                    //    b.IsDataDescriptor(previous) is true and IsAccessorDescriptor(propId.descriptor) is true.
-                    //    c.IsAccessorDescriptor(previous) is true and IsDataDescriptor(propId.descriptor) is true.
-                    //    d.IsAccessorDescriptor(previous) is true and IsAccessorDescriptor(propId.descriptor) is true
-                    // and either both previous and propId.descriptor have[[Get]] fields or both previous and propId.descriptor have[[Set]] fields
-                    var currentKind = prop.kind === 270 /* PropertyAssignment */ || prop.kind === 271 /* ShorthandPropertyAssignment */ || prop.kind === 154 /* MethodDeclaration */
-                        ? 1 /* Property */
-                        : 2 /* Accessor */;
+                    var currentKind = prop.kind === 270 || prop.kind === 271 || prop.kind === 154
+                        ? 1
+                        : 2;
                     var existingKind = seen.get(identifier.escapedText);
                     if (!existingKind) {
                         seen.set(identifier.escapedText, currentKind);
                         continue;
                     }
-                    if (currentKind === 1 /* Property */ && existingKind === 1 /* Property */) {
+                    if (currentKind === 1 && existingKind === 1) {
                         var span = ts.getErrorSpanForNode(file, identifier);
                         file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, ts.Diagnostics.An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode));
                     }
                 }
             }
-            return bindAnonymousDeclaration(node, 4096 /* ObjectLiteral */, "__object" /* Object */);
+            return bindAnonymousDeclaration(node, 4096, "__object");
         }
         function bindJsxAttributes(node) {
-            return bindAnonymousDeclaration(node, 4096 /* ObjectLiteral */, "__jsxAttributes" /* JSXAttributes */);
+            return bindAnonymousDeclaration(node, 4096, "__jsxAttributes");
         }
         function bindJsxAttribute(node, symbolFlags, symbolExcludes) {
             return declareSymbolAndAddToSymbolTable(node, symbolFlags, symbolExcludes);
         }
         function bindAnonymousDeclaration(node, symbolFlags, name) {
             var symbol = createSymbol(symbolFlags, name);
-            if (symbolFlags & (8 /* EnumMember */ | 106500 /* ClassMember */)) {
+            if (symbolFlags & (8 | 106500)) {
                 symbol.parent = container.symbol;
             }
             addDeclarationToSymbol(symbol, node, symbolFlags);
@@ -26910,25 +21825,24 @@ var ts;
         }
         function bindBlockScopedDeclaration(node, symbolFlags, symbolExcludes) {
             switch (blockScopeContainer.kind) {
-                case 239 /* ModuleDeclaration */:
+                case 239:
                     declareModuleMember(node, symbolFlags, symbolExcludes);
                     break;
-                case 274 /* SourceFile */:
+                case 274:
                     if (ts.isExternalOrCommonJsModule(container)) {
                         declareModuleMember(node, symbolFlags, symbolExcludes);
                         break;
                     }
-                // falls through
                 default:
                     if (!blockScopeContainer.locals) {
                         blockScopeContainer.locals = ts.createSymbolTable();
                         addToContainerChain(blockScopeContainer);
                     }
-                    declareSymbol(blockScopeContainer.locals, /*parent*/ undefined, node, symbolFlags, symbolExcludes);
+                    declareSymbol(blockScopeContainer.locals, undefined, node, symbolFlags, symbolExcludes);
             }
         }
         function bindBlockScopedVariableDeclaration(node) {
-            bindBlockScopedDeclaration(node, 2 /* BlockScopedVariable */, 67216319 /* BlockScopedVariableExcludes */);
+            bindBlockScopedDeclaration(node, 2, 67216319);
         }
         function delayedBindJSDocTypedefTag() {
             if (!delayedTypeAliases) {
@@ -26942,14 +21856,14 @@ var ts;
             for (var _i = 0, delayedTypeAliases_1 = delayedTypeAliases; _i < delayedTypeAliases_1.length; _i++) {
                 var typeAlias = delayedTypeAliases_1[_i];
                 var host = ts.getJSDocHost(typeAlias);
-                container = ts.findAncestor(host.parent, function (n) { return !!(getContainerFlags(n) & 1 /* IsContainer */); }) || file;
+                container = ts.findAncestor(host.parent, function (n) { return !!(getContainerFlags(n) & 1); }) || file;
                 blockScopeContainer = ts.getEnclosingBlockScopeContainer(host) || file;
-                currentFlow = { flags: 2 /* Start */ };
+                currentFlow = { flags: 2 };
                 parent = typeAlias;
                 bind(typeAlias.typeExpression);
-                if (!typeAlias.fullName || typeAlias.fullName.kind === 71 /* Identifier */) {
+                if (!typeAlias.fullName || typeAlias.fullName.kind === 71) {
                     parent = typeAlias.parent;
-                    bindBlockScopedDeclaration(typeAlias, 524288 /* TypeAlias */, 67901928 /* TypeAliasExcludes */);
+                    bindBlockScopedDeclaration(typeAlias, 524288, 67901928);
                 }
                 else {
                     bind(typeAlias.fullName);
@@ -26961,23 +21875,18 @@ var ts;
             parent = saveParent;
             currentFlow = saveCurrentFlow;
         }
-        // The binder visits every node in the syntax tree so it is a convenient place to perform a single localized
-        // check for reserved words used as identifiers in strict mode code.
         function checkStrictModeIdentifier(node) {
             if (inStrictMode &&
-                node.originalKeywordKind >= 108 /* FirstFutureReservedWord */ &&
-                node.originalKeywordKind <= 116 /* LastFutureReservedWord */ &&
+                node.originalKeywordKind >= 108 &&
+                node.originalKeywordKind <= 116 &&
                 !ts.isIdentifierName(node) &&
-                !(node.flags & 4194304 /* Ambient */)) {
-                // Report error only if there are no parse errors in file
+                !(node.flags & 4194304)) {
                 if (!file.parseDiagnostics.length) {
                     file.bindDiagnostics.push(createDiagnosticForNode(node, getStrictModeIdentifierMessage(node), ts.declarationNameToString(node)));
                 }
             }
         }
         function getStrictModeIdentifierMessage(node) {
-            // Provide specialized messages to help the user understand why we think they're in
-            // strict mode.
             if (ts.getContainingClass(node)) {
                 return ts.Diagnostics.Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_strict_mode;
             }
@@ -26988,23 +21897,16 @@ var ts;
         }
         function checkStrictModeBinaryExpression(node) {
             if (inStrictMode && ts.isLeftHandSideExpression(node.left) && ts.isAssignmentOperator(node.operatorToken.kind)) {
-                // ECMA 262 (Annex C) The identifier eval or arguments may not appear as the LeftHandSideExpression of an
-                // Assignment operator(11.13) or of a PostfixExpression(11.3)
                 checkStrictModeEvalOrArguments(node, node.left);
             }
         }
         function checkStrictModeCatchClause(node) {
-            // It is a SyntaxError if a TryStatement with a Catch occurs within strict code and the Identifier of the
-            // Catch production is eval or arguments
             if (inStrictMode && node.variableDeclaration) {
                 checkStrictModeEvalOrArguments(node, node.variableDeclaration.name);
             }
         }
         function checkStrictModeDeleteExpression(node) {
-            // Grammar checking
-            if (inStrictMode && node.expression.kind === 71 /* Identifier */) {
-                // When a delete operator occurs within strict mode code, a SyntaxError is thrown if its
-                // UnaryExpression is a direct reference to a variable, function argument, or function name
+            if (inStrictMode && node.expression.kind === 71) {
                 var span = ts.getErrorSpanForNode(file, node.expression);
                 file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, ts.Diagnostics.delete_cannot_be_called_on_an_identifier_in_strict_mode));
             }
@@ -27013,19 +21915,15 @@ var ts;
             return ts.isIdentifier(node) && (node.escapedText === "eval" || node.escapedText === "arguments");
         }
         function checkStrictModeEvalOrArguments(contextNode, name) {
-            if (name && name.kind === 71 /* Identifier */) {
+            if (name && name.kind === 71) {
                 var identifier = name;
                 if (isEvalOrArgumentsIdentifier(identifier)) {
-                    // We check first if the name is inside class declaration or class expression; if so give explicit message
-                    // otherwise report generic error message.
                     var span = ts.getErrorSpanForNode(file, name);
                     file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, getStrictModeEvalOrArgumentsMessage(contextNode), ts.idText(identifier)));
                 }
             }
         }
         function getStrictModeEvalOrArgumentsMessage(node) {
-            // Provide specialized messages to help the user understand why we think they're in
-            // strict mode.
             if (ts.getContainingClass(node)) {
                 return ts.Diagnostics.Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode;
             }
@@ -27036,13 +21934,10 @@ var ts;
         }
         function checkStrictModeFunctionName(node) {
             if (inStrictMode) {
-                // It is a SyntaxError if the identifier eval or arguments appears within a FormalParameterList of a strict mode FunctionDeclaration or FunctionExpression (13.1))
                 checkStrictModeEvalOrArguments(node, node.name);
             }
         }
         function getStrictModeBlockScopeFunctionDeclarationMessage(node) {
-            // Provide specialized messages to help the user understand why we think they're in
-            // strict mode.
             if (ts.getContainingClass(node)) {
                 return ts.Diagnostics.Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_definitions_are_automatically_in_strict_mode;
             }
@@ -27052,42 +21947,33 @@ var ts;
             return ts.Diagnostics.Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5;
         }
         function checkStrictModeFunctionDeclaration(node) {
-            if (languageVersion < 2 /* ES2015 */) {
-                // Report error if function is not top level function declaration
-                if (blockScopeContainer.kind !== 274 /* SourceFile */ &&
-                    blockScopeContainer.kind !== 239 /* ModuleDeclaration */ &&
+            if (languageVersion < 2) {
+                if (blockScopeContainer.kind !== 274 &&
+                    blockScopeContainer.kind !== 239 &&
                     !ts.isFunctionLike(blockScopeContainer)) {
-                    // We check first if the name is inside class declaration or class expression; if so give explicit message
-                    // otherwise report generic error message.
                     var errorSpan = ts.getErrorSpanForNode(file, node);
                     file.bindDiagnostics.push(ts.createFileDiagnostic(file, errorSpan.start, errorSpan.length, getStrictModeBlockScopeFunctionDeclarationMessage(node)));
                 }
             }
         }
         function checkStrictModeNumericLiteral(node) {
-            if (inStrictMode && node.numericLiteralFlags & 32 /* Octal */) {
+            if (inStrictMode && node.numericLiteralFlags & 32) {
                 file.bindDiagnostics.push(createDiagnosticForNode(node, ts.Diagnostics.Octal_literals_are_not_allowed_in_strict_mode));
             }
         }
         function checkStrictModePostfixUnaryExpression(node) {
-            // Grammar checking
-            // The identifier eval or arguments may not appear as the LeftHandSideExpression of an
-            // Assignment operator(11.13) or of a PostfixExpression(11.3) or as the UnaryExpression
-            // operated upon by a Prefix Increment(11.4.4) or a Prefix Decrement(11.4.5) operator.
             if (inStrictMode) {
                 checkStrictModeEvalOrArguments(node, node.operand);
             }
         }
         function checkStrictModePrefixUnaryExpression(node) {
-            // Grammar checking
             if (inStrictMode) {
-                if (node.operator === 43 /* PlusPlusToken */ || node.operator === 44 /* MinusMinusToken */) {
+                if (node.operator === 43 || node.operator === 44) {
                     checkStrictModeEvalOrArguments(node, node.operand);
                 }
             }
         }
         function checkStrictModeWithStatement(node) {
-            // Grammar checking for withStatement
             if (inStrictMode) {
                 errorOnFirstToken(node, ts.Diagnostics.with_statements_are_not_allowed_in_strict_mode);
             }
@@ -27112,36 +21998,12 @@ var ts;
             }
             node.parent = parent;
             var saveInStrictMode = inStrictMode;
-            // Even though in the AST the jsdoc @typedef node belongs to the current node,
-            // its symbol might be in the same scope with the current node's symbol. Consider:
-            //
-            //     /** @typedef {string | number} MyType */
-            //     function foo();
-            //
-            // Here the current node is "foo", which is a container, but the scope of "MyType" should
-            // not be inside "foo". Therefore we always bind @typedef before bind the parent node,
-            // and skip binding this tag later when binding all the other jsdoc tags.
-            // First we bind declaration nodes to a symbol if possible. We'll both create a symbol
-            // and then potentially add the symbol to an appropriate symbol table. Possible
-            // destination symbol tables are:
-            //
-            //  1) The 'exports' table of the current container's symbol.
-            //  2) The 'members' table of the current container's symbol.
-            //  3) The 'locals' table of the current container.
-            //
-            // However, not all symbols will end up in any of these tables. 'Anonymous' symbols
-            // (like TypeLiterals for example) will not be put in any table.
             bindWorker(node);
-            // Then we recurse into the children of the node to bind them as well. For certain
-            // symbols we do specialized work when we recurse. For example, we'll keep track of
-            // the current 'container' node when it changes. This helps us know which symbol table
-            // a local should go into for example. Since terminal nodes are known not to have
-            // children, as an optimization we don't process those.
-            if (node.kind > 145 /* LastToken */) {
+            if (node.kind > 145) {
                 var saveParent = parent;
                 parent = node;
                 var containerFlags = getContainerFlags(node);
-                if (containerFlags === 0 /* None */) {
+                if (containerFlags === 0) {
                     bindChildren(node);
                 }
                 else {
@@ -27149,7 +22011,7 @@ var ts;
                 }
                 parent = saveParent;
             }
-            else if (!skipTransformFlagAggregation && (node.transformFlags & 536870912 /* HasComputedFlags */) === 0) {
+            else if (!skipTransformFlagAggregation && (node.transformFlags & 536870912) === 0) {
                 subtreeTransformFlags |= computeTransformFlagsForNode(node, 0);
                 bindJSDoc(node);
             }
@@ -27185,35 +22047,27 @@ var ts;
                 }
             }
         }
-        /// Should be called only on prologue directives (isPrologueDirective(node) should be true)
         function isUseStrictPrologueDirective(node) {
             var nodeText = ts.getSourceTextOfNodeFromSourceFile(file, node.expression);
-            // Note: the node text must be exactly "use strict" or 'use strict'.  It is not ok for the
-            // string to contain unicode escapes (as per ES5).
             return nodeText === '"use strict"' || nodeText === "'use strict'";
         }
         function bindWorker(node) {
             switch (node.kind) {
-                /* Strict mode checks */
-                case 71 /* Identifier */:
-                    // for typedef type names with namespaces, bind the new jsdoc type symbol here
-                    // because it requires all containing namespaces to be in effect, namely the
-                    // current "blockScopeContainer" needs to be set to its immediate namespace parent.
+                case 71:
                     if (node.isInJSDocNamespace) {
                         var parentNode = node.parent;
                         while (parentNode && !ts.isJSDocTypeAlias(parentNode)) {
                             parentNode = parentNode.parent;
                         }
-                        bindBlockScopedDeclaration(parentNode, 524288 /* TypeAlias */, 67901928 /* TypeAliasExcludes */);
+                        bindBlockScopedDeclaration(parentNode, 524288, 67901928);
                         break;
                     }
-                // falls through
-                case 99 /* ThisKeyword */:
-                    if (currentFlow && (ts.isExpression(node) || parent.kind === 271 /* ShorthandPropertyAssignment */)) {
+                case 99:
+                    if (currentFlow && (ts.isExpression(node) || parent.kind === 271)) {
                         node.flowNode = currentFlow;
                     }
                     return checkStrictModeIdentifier(node);
-                case 185 /* PropertyAccessExpression */:
+                case 185:
                     if (currentFlow && isNarrowableReference(node)) {
                         node.flowNode = currentFlow;
                     }
@@ -27221,173 +22075,162 @@ var ts;
                         bindSpecialPropertyDeclaration(node);
                     }
                     break;
-                case 200 /* BinaryExpression */:
+                case 200:
                     var specialKind = ts.getSpecialPropertyAssignmentKind(node);
                     switch (specialKind) {
-                        case 1 /* ExportsProperty */:
+                        case 1:
                             bindExportsPropertyAssignment(node);
                             break;
-                        case 2 /* ModuleExports */:
+                        case 2:
                             bindModuleExportsAssignment(node);
                             break;
-                        case 3 /* PrototypeProperty */:
+                        case 3:
                             bindPrototypePropertyAssignment(node.left, node);
                             break;
-                        case 6 /* Prototype */:
+                        case 6:
                             bindPrototypeAssignment(node);
                             break;
-                        case 4 /* ThisProperty */:
+                        case 4:
                             bindThisPropertyAssignment(node);
                             break;
-                        case 5 /* Property */:
+                        case 5:
                             bindSpecialPropertyAssignment(node);
                             break;
-                        case 0 /* None */:
-                            // Nothing to do
+                        case 0:
                             break;
                         default:
                             ts.Debug.fail("Unknown special property assignment kind");
                     }
                     return checkStrictModeBinaryExpression(node);
-                case 269 /* CatchClause */:
+                case 269:
                     return checkStrictModeCatchClause(node);
-                case 194 /* DeleteExpression */:
+                case 194:
                     return checkStrictModeDeleteExpression(node);
-                case 8 /* NumericLiteral */:
+                case 8:
                     return checkStrictModeNumericLiteral(node);
-                case 199 /* PostfixUnaryExpression */:
+                case 199:
                     return checkStrictModePostfixUnaryExpression(node);
-                case 198 /* PrefixUnaryExpression */:
+                case 198:
                     return checkStrictModePrefixUnaryExpression(node);
-                case 226 /* WithStatement */:
+                case 226:
                     return checkStrictModeWithStatement(node);
-                case 174 /* ThisType */:
+                case 174:
                     seenThisKeyword = true;
                     return;
-                case 161 /* TypePredicate */:
-                    break; // Binding the children will handle everything
-                case 148 /* TypeParameter */:
+                case 161:
+                    break;
+                case 148:
                     return bindTypeParameter(node);
-                case 149 /* Parameter */:
+                case 149:
                     return bindParameter(node);
-                case 232 /* VariableDeclaration */:
+                case 232:
                     return bindVariableDeclarationOrBindingElement(node);
-                case 182 /* BindingElement */:
+                case 182:
                     node.flowNode = currentFlow;
                     return bindVariableDeclarationOrBindingElement(node);
-                case 152 /* PropertyDeclaration */:
-                case 151 /* PropertySignature */:
+                case 152:
+                case 151:
                     return bindPropertyWorker(node);
-                case 270 /* PropertyAssignment */:
-                case 271 /* ShorthandPropertyAssignment */:
-                    return bindPropertyOrMethodOrAccessor(node, 4 /* Property */, 0 /* PropertyExcludes */);
-                case 273 /* EnumMember */:
-                    return bindPropertyOrMethodOrAccessor(node, 8 /* EnumMember */, 68008959 /* EnumMemberExcludes */);
-                case 158 /* CallSignature */:
-                case 159 /* ConstructSignature */:
-                case 160 /* IndexSignature */:
-                    return declareSymbolAndAddToSymbolTable(node, 131072 /* Signature */, 0 /* None */);
-                case 154 /* MethodDeclaration */:
-                case 153 /* MethodSignature */:
-                    // If this is an ObjectLiteralExpression method, then it sits in the same space
-                    // as other properties in the object literal.  So we use SymbolFlags.PropertyExcludes
-                    // so that it will conflict with any other object literal members with the same
-                    // name.
-                    return bindPropertyOrMethodOrAccessor(node, 8192 /* Method */ | (node.questionToken ? 16777216 /* Optional */ : 0 /* None */), ts.isObjectLiteralMethod(node) ? 0 /* PropertyExcludes */ : 67208127 /* MethodExcludes */);
-                case 234 /* FunctionDeclaration */:
+                case 270:
+                case 271:
+                    return bindPropertyOrMethodOrAccessor(node, 4, 0);
+                case 273:
+                    return bindPropertyOrMethodOrAccessor(node, 8, 68008959);
+                case 158:
+                case 159:
+                case 160:
+                    return declareSymbolAndAddToSymbolTable(node, 131072, 0);
+                case 154:
+                case 153:
+                    return bindPropertyOrMethodOrAccessor(node, 8192 | (node.questionToken ? 16777216 : 0), ts.isObjectLiteralMethod(node) ? 0 : 67208127);
+                case 234:
                     return bindFunctionDeclaration(node);
-                case 155 /* Constructor */:
-                    return declareSymbolAndAddToSymbolTable(node, 16384 /* Constructor */, /*symbolExcludes:*/ 0 /* None */);
-                case 156 /* GetAccessor */:
-                    return bindPropertyOrMethodOrAccessor(node, 32768 /* GetAccessor */, 67150783 /* GetAccessorExcludes */);
-                case 157 /* SetAccessor */:
-                    return bindPropertyOrMethodOrAccessor(node, 65536 /* SetAccessor */, 67183551 /* SetAccessorExcludes */);
-                case 163 /* FunctionType */:
-                case 284 /* JSDocFunctionType */:
-                case 288 /* JSDocSignature */:
-                case 164 /* ConstructorType */:
+                case 155:
+                    return declareSymbolAndAddToSymbolTable(node, 16384, 0);
+                case 156:
+                    return bindPropertyOrMethodOrAccessor(node, 32768, 67150783);
+                case 157:
+                    return bindPropertyOrMethodOrAccessor(node, 65536, 67183551);
+                case 163:
+                case 284:
+                case 288:
+                case 164:
                     return bindFunctionOrConstructorType(node);
-                case 166 /* TypeLiteral */:
-                case 287 /* JSDocTypeLiteral */:
-                case 177 /* MappedType */:
+                case 166:
+                case 287:
+                case 177:
                     return bindAnonymousTypeWorker(node);
-                case 184 /* ObjectLiteralExpression */:
+                case 184:
                     return bindObjectLiteralExpression(node);
-                case 192 /* FunctionExpression */:
-                case 193 /* ArrowFunction */:
+                case 192:
+                case 193:
                     return bindFunctionExpression(node);
-                case 187 /* CallExpression */:
+                case 187:
                     if (ts.isInJavaScriptFile(node)) {
                         bindCallExpression(node);
                     }
                     break;
-                // Members of classes, interfaces, and modules
-                case 205 /* ClassExpression */:
-                case 235 /* ClassDeclaration */:
-                    // All classes are automatically in strict mode in ES6.
+                case 205:
+                case 235:
                     inStrictMode = true;
                     return bindClassLikeDeclaration(node);
-                case 236 /* InterfaceDeclaration */:
-                    return bindBlockScopedDeclaration(node, 64 /* Interface */, 67901832 /* InterfaceExcludes */);
-                case 237 /* TypeAliasDeclaration */:
-                    return bindBlockScopedDeclaration(node, 524288 /* TypeAlias */, 67901928 /* TypeAliasExcludes */);
-                case 238 /* EnumDeclaration */:
+                case 236:
+                    return bindBlockScopedDeclaration(node, 64, 67901832);
+                case 237:
+                    return bindBlockScopedDeclaration(node, 524288, 67901928);
+                case 238:
                     return bindEnumDeclaration(node);
-                case 239 /* ModuleDeclaration */:
+                case 239:
                     return bindModuleDeclaration(node);
-                // Jsx-attributes
-                case 263 /* JsxAttributes */:
+                case 263:
                     return bindJsxAttributes(node);
-                case 262 /* JsxAttribute */:
-                    return bindJsxAttribute(node, 4 /* Property */, 0 /* PropertyExcludes */);
-                // Imports and exports
-                case 243 /* ImportEqualsDeclaration */:
-                case 246 /* NamespaceImport */:
-                case 248 /* ImportSpecifier */:
-                case 252 /* ExportSpecifier */:
-                    return declareSymbolAndAddToSymbolTable(node, 2097152 /* Alias */, 2097152 /* AliasExcludes */);
-                case 242 /* NamespaceExportDeclaration */:
+                case 262:
+                    return bindJsxAttribute(node, 4, 0);
+                case 243:
+                case 246:
+                case 248:
+                case 252:
+                    return declareSymbolAndAddToSymbolTable(node, 2097152, 2097152);
+                case 242:
                     return bindNamespaceExportDeclaration(node);
-                case 245 /* ImportClause */:
+                case 245:
                     return bindImportClause(node);
-                case 250 /* ExportDeclaration */:
+                case 250:
                     return bindExportDeclaration(node);
-                case 249 /* ExportAssignment */:
+                case 249:
                     return bindExportAssignment(node);
-                case 274 /* SourceFile */:
+                case 274:
                     updateStrictModeStatementList(node.statements);
                     return bindSourceFileIfExternalModule();
-                case 213 /* Block */:
+                case 213:
                     if (!ts.isFunctionLike(node.parent)) {
                         return;
                     }
-                // falls through
-                case 240 /* ModuleBlock */:
+                case 240:
                     return updateStrictModeStatementList(node.statements);
-                case 293 /* JSDocParameterTag */:
-                    if (node.parent.kind === 288 /* JSDocSignature */) {
+                case 293:
+                    if (node.parent.kind === 288) {
                         return bindParameter(node);
                     }
-                    if (node.parent.kind !== 287 /* JSDocTypeLiteral */) {
+                    if (node.parent.kind !== 287) {
                         break;
                     }
-                // falls through
-                case 298 /* JSDocPropertyTag */:
+                case 298:
                     var propTag = node;
-                    var flags = propTag.isBracketed || propTag.typeExpression && propTag.typeExpression.type.kind === 283 /* JSDocOptionalType */ ?
-                        4 /* Property */ | 16777216 /* Optional */ :
-                        4 /* Property */;
-                    return declareSymbolAndAddToSymbolTable(propTag, flags, 0 /* PropertyExcludes */);
-                case 297 /* JSDocTypedefTag */:
-                case 292 /* JSDocCallbackTag */:
+                    var flags = propTag.isBracketed || propTag.typeExpression && propTag.typeExpression.type.kind === 283 ?
+                        4 | 16777216 :
+                        4;
+                    return declareSymbolAndAddToSymbolTable(propTag, flags, 0);
+                case 297:
+                case 292:
                     return (delayedTypeAliases || (delayedTypeAliases = [])).push(node);
             }
         }
         function bindPropertyWorker(node) {
-            return bindPropertyOrMethodOrAccessor(node, 4 /* Property */ | (node.questionToken ? 16777216 /* Optional */ : 0 /* None */), 0 /* PropertyExcludes */);
+            return bindPropertyOrMethodOrAccessor(node, 4 | (node.questionToken ? 16777216 : 0), 0);
         }
         function bindAnonymousTypeWorker(node) {
-            return bindAnonymousDeclaration(node, 2048 /* TypeLiteral */, "__type" /* Type */);
+            return bindAnonymousDeclaration(node, 2048, "__type");
         }
         function bindSourceFileIfExternalModule() {
             setExportContextFlag(file);
@@ -27396,36 +22239,30 @@ var ts;
             }
             else if (ts.isJsonSourceFile(file)) {
                 bindSourceFileAsExternalModule();
-                // Create symbol equivalent for the module.exports = {}
                 var originalSymbol = file.symbol;
-                declareSymbol(file.symbol.exports, file.symbol, file, 4 /* Property */, 67108863 /* All */);
+                declareSymbol(file.symbol.exports, file.symbol, file, 4, 67108863);
                 file.symbol = originalSymbol;
             }
         }
         function bindSourceFileAsExternalModule() {
-            bindAnonymousDeclaration(file, 512 /* ValueModule */, "\"" + ts.removeFileExtension(file.fileName) + "\"");
+            bindAnonymousDeclaration(file, 512, "\"" + ts.removeFileExtension(file.fileName) + "\"");
         }
         function bindExportAssignment(node) {
             if (!container.symbol || !container.symbol.exports) {
-                // Export assignment in some sort of block construct
-                bindAnonymousDeclaration(node, 2097152 /* Alias */, getDeclarationName(node));
+                bindAnonymousDeclaration(node, 2097152, getDeclarationName(node));
             }
             else {
-                var flags = node.kind === 249 /* ExportAssignment */ && ts.exportAssignmentIsAlias(node)
-                    // An export default clause with an EntityNameExpression or a class expression exports all meanings of that identifier or expression;
-                    ? 2097152 /* Alias */
-                    // An export default clause with any other expression exports a value
-                    : 4 /* Property */;
-                // If there is an `export default x;` alias declaration, can't `export default` anything else.
-                // (In contrast, you can still have `export default function f() {}` and `export default interface I {}`.)
-                declareSymbol(container.symbol.exports, container.symbol, node, flags, 67108863 /* All */);
+                var flags = node.kind === 249 && ts.exportAssignmentIsAlias(node)
+                    ? 2097152
+                    : 4;
+                declareSymbol(container.symbol.exports, container.symbol, node, flags, 67108863);
             }
         }
         function bindNamespaceExportDeclaration(node) {
             if (node.modifiers && node.modifiers.length) {
                 file.bindDiagnostics.push(createDiagnosticForNode(node, ts.Diagnostics.Modifiers_cannot_appear_here));
             }
-            if (node.parent.kind !== 274 /* SourceFile */) {
+            if (node.parent.kind !== 274) {
                 file.bindDiagnostics.push(createDiagnosticForNode(node, ts.Diagnostics.Global_module_exports_may_only_appear_at_top_level));
                 return;
             }
@@ -27441,21 +22278,19 @@ var ts;
                 }
             }
             file.symbol.globalExports = file.symbol.globalExports || ts.createSymbolTable();
-            declareSymbol(file.symbol.globalExports, file.symbol, node, 2097152 /* Alias */, 2097152 /* AliasExcludes */);
+            declareSymbol(file.symbol.globalExports, file.symbol, node, 2097152, 2097152);
         }
         function bindExportDeclaration(node) {
             if (!container.symbol || !container.symbol.exports) {
-                // Export * in some sort of block construct
-                bindAnonymousDeclaration(node, 8388608 /* ExportStar */, getDeclarationName(node));
+                bindAnonymousDeclaration(node, 8388608, getDeclarationName(node));
             }
             else if (!node.exportClause) {
-                // All export * declarations are collected in an __export symbol
-                declareSymbol(container.symbol.exports, container.symbol, node, 8388608 /* ExportStar */, 0 /* None */);
+                declareSymbol(container.symbol.exports, container.symbol, node, 8388608, 0);
             }
         }
         function bindImportClause(node) {
             if (node.name) {
-                declareSymbolAndAddToSymbolTable(node, 2097152 /* Alias */, 2097152 /* AliasExcludes */);
+                declareSymbolAndAddToSymbolTable(node, 2097152, 2097152);
             }
         }
         function setCommonJsModuleIndicator(node) {
@@ -27467,86 +22302,71 @@ var ts;
             }
         }
         function bindExportsPropertyAssignment(node) {
-            // When we create a property via 'exports.foo = bar', the 'exports.foo' property access
-            // expression is the declaration
             setCommonJsModuleIndicator(node);
             var lhs = node.left;
-            var symbol = forEachIdentifierInEntityName(lhs.expression, /*parent*/ undefined, function (id, symbol) {
+            var symbol = forEachIdentifierInEntityName(lhs.expression, undefined, function (id, symbol) {
                 if (symbol) {
-                    addDeclarationToSymbol(symbol, id, 1536 /* Module */ | 67108864 /* JSContainer */);
+                    addDeclarationToSymbol(symbol, id, 1536 | 67108864);
                 }
                 return symbol;
             });
             if (symbol) {
                 var flags = ts.isClassExpression(node.right) ?
-                    4 /* Property */ | 1048576 /* ExportValue */ | 32 /* Class */ :
-                    4 /* Property */ | 1048576 /* ExportValue */;
-                declareSymbol(symbol.exports, symbol, lhs, flags, 0 /* None */);
+                    4 | 1048576 | 32 :
+                    4 | 1048576;
+                declareSymbol(symbol.exports, symbol, lhs, flags, 0);
             }
         }
         function bindModuleExportsAssignment(node) {
-            // A common practice in node modules is to set 'export = module.exports = {}', this ensures that 'exports'
-            // is still pointing to 'module.exports'.
-            // We do not want to consider this as 'export=' since a module can have only one of these.
-            // Similarly we do not want to treat 'module.exports = exports' as an 'export='.
             var assignedExpression = ts.getRightMostAssignedExpression(node.right);
             if (ts.isEmptyObjectLiteral(assignedExpression) || container === file && isExportsOrModuleExportsOrAlias(file, assignedExpression)) {
-                // Mark it as a module in case there are no other exports in the file
                 setCommonJsModuleIndicator(node);
                 return;
             }
-            // 'module.exports = expr' assignment
             setCommonJsModuleIndicator(node);
             var flags = ts.exportAssignmentIsAlias(node)
-                ? 2097152 /* Alias */
-                : 4 /* Property */ | 1048576 /* ExportValue */ | 512 /* ValueModule */;
-            declareSymbol(file.symbol.exports, file.symbol, node, flags, 0 /* None */);
+                ? 2097152
+                : 4 | 1048576 | 512;
+            declareSymbol(file.symbol.exports, file.symbol, node, flags, 0);
         }
         function bindThisPropertyAssignment(node) {
             ts.Debug.assert(ts.isInJavaScriptFile(node));
-            var thisContainer = ts.getThisContainer(node, /*includeArrowFunctions*/ false);
+            var thisContainer = ts.getThisContainer(node, false);
             switch (thisContainer.kind) {
-                case 234 /* FunctionDeclaration */:
-                case 192 /* FunctionExpression */:
+                case 234:
+                case 192:
                     var constructorSymbol = thisContainer.symbol;
-                    // For `f.prototype.m = function() { this.x = 0; }`, `this.x = 0` should modify `f`'s members, not the function expression.
-                    if (ts.isBinaryExpression(thisContainer.parent) && thisContainer.parent.operatorToken.kind === 58 /* EqualsToken */) {
+                    if (ts.isBinaryExpression(thisContainer.parent) && thisContainer.parent.operatorToken.kind === 58) {
                         var l = thisContainer.parent.left;
                         if (ts.isPropertyAccessEntityNameExpression(l) && ts.isPrototypeAccess(l.expression)) {
                             constructorSymbol = lookupSymbolForPropertyAccess(l.expression.expression, thisParentContainer);
                         }
                     }
                     if (constructorSymbol) {
-                        // Declare a 'member' if the container is an ES5 class or ES6 constructor
                         constructorSymbol.members = constructorSymbol.members || ts.createSymbolTable();
-                        // It's acceptable for multiple 'this' assignments of the same identifier to occur
-                        declareSymbol(constructorSymbol.members, constructorSymbol, node, 4 /* Property */, 0 /* PropertyExcludes */ & ~4 /* Property */);
+                        declareSymbol(constructorSymbol.members, constructorSymbol, node, 4, 0 & ~4);
                     }
                     break;
-                case 155 /* Constructor */:
-                case 152 /* PropertyDeclaration */:
-                case 154 /* MethodDeclaration */:
-                case 156 /* GetAccessor */:
-                case 157 /* SetAccessor */:
-                    // this.foo assignment in a JavaScript class
-                    // Bind this property to the containing class
+                case 155:
+                case 152:
+                case 154:
+                case 156:
+                case 157:
                     var containingClass = thisContainer.parent;
-                    var symbolTable = ts.hasModifier(thisContainer, 32 /* Static */) ? containingClass.symbol.exports : containingClass.symbol.members;
-                    declareSymbol(symbolTable, containingClass.symbol, node, 4 /* Property */, 0 /* None */, /*isReplaceableByMethod*/ true);
+                    var symbolTable = ts.hasModifier(thisContainer, 32) ? containingClass.symbol.exports : containingClass.symbol.members;
+                    declareSymbol(symbolTable, containingClass.symbol, node, 4, 0, true);
                     break;
-                case 274 /* SourceFile */:
-                    // this.foo assignment in a source file
-                    // Do not bind. It would be nice to support this someday though.
+                case 274:
                     break;
                 default:
                     ts.Debug.fail(ts.Debug.showSyntaxKind(thisContainer));
             }
         }
         function bindSpecialPropertyDeclaration(node) {
-            if (node.expression.kind === 99 /* ThisKeyword */) {
+            if (node.expression.kind === 99) {
                 bindThisPropertyAssignment(node);
             }
-            else if (ts.isPropertyAccessEntityNameExpression(node) && node.parent.parent.kind === 274 /* SourceFile */) {
+            else if (ts.isPropertyAccessEntityNameExpression(node) && node.parent.parent.kind === 274) {
                 if (ts.isPrototypeAccess(node.expression)) {
                     bindPrototypePropertyAssignment(node, node.parent);
                 }
@@ -27555,61 +22375,44 @@ var ts;
                 }
             }
         }
-        /** For `x.prototype = { p, ... }`, declare members p,... if `x` is function/class/{}, or not declared. */
         function bindPrototypeAssignment(node) {
             node.left.parent = node;
             node.right.parent = node;
             var lhs = node.left;
-            bindPropertyAssignment(lhs, lhs, /*isPrototypeProperty*/ false);
+            bindPropertyAssignment(lhs, lhs, false);
         }
-        /**
-         * For `x.prototype.y = z`, declare a member `y` on `x` if `x` is a function or class, or not declared.
-         * Note that jsdoc preceding an ExpressionStatement like `x.prototype.y;` is also treated as a declaration.
-         */
         function bindPrototypePropertyAssignment(lhs, parent) {
-            // Look up the function in the local scope, since prototype assignments should
-            // follow the function declaration
             var classPrototype = lhs.expression;
             var constructorFunction = classPrototype.expression;
-            // Fix up parent pointers since we're going to use these nodes before we bind into them
             lhs.parent = parent;
             constructorFunction.parent = classPrototype;
             classPrototype.parent = lhs;
-            bindPropertyAssignment(constructorFunction, lhs, /*isPrototypeProperty*/ true);
+            bindPropertyAssignment(constructorFunction, lhs, true);
         }
         function bindSpecialPropertyAssignment(node) {
             var lhs = node.left;
-            // Fix up parent pointers since we're going to use these nodes before we bind into them
             node.left.parent = node;
             node.right.parent = node;
             if (ts.isIdentifier(lhs.expression) && container === file && isNameOfExportsOrModuleExportsAliasDeclaration(file, lhs.expression)) {
-                // This can be an alias for the 'exports' or 'module.exports' names, e.g.
-                //    var util = module.exports;
-                //    util.property = function ...
                 bindExportsPropertyAssignment(node);
             }
             else {
                 bindStaticPropertyAssignment(lhs);
             }
         }
-        /**
-         * For nodes like `x.y = z`, declare a member 'y' on 'x' if x is a function (or IIFE) or class or {}, or not declared.
-         * Also works for expression statements preceded by JSDoc, like / ** @type number * / x.y;
-         */
         function bindStaticPropertyAssignment(node) {
             node.expression.parent = node;
-            bindPropertyAssignment(node.expression, node, /*isPrototypeProperty*/ false);
+            bindPropertyAssignment(node.expression, node, false);
         }
         function bindPropertyAssignment(name, propertyAccess, isPrototypeProperty) {
             var namespaceSymbol = lookupSymbolForPropertyAccess(name);
             var isToplevelNamespaceableInitializer = ts.isBinaryExpression(propertyAccess.parent)
-                ? getParentOfBinaryExpression(propertyAccess.parent).parent.kind === 274 /* SourceFile */ &&
+                ? getParentOfBinaryExpression(propertyAccess.parent).parent.kind === 274 &&
                     !!ts.getJavascriptInitializer(ts.getInitializerOfBinaryExpression(propertyAccess.parent), ts.isPrototypeAccess(propertyAccess.parent.left))
-                : propertyAccess.parent.parent.kind === 274 /* SourceFile */;
-            if (!isPrototypeProperty && (!namespaceSymbol || !(namespaceSymbol.flags & 1920 /* Namespace */)) && isToplevelNamespaceableInitializer) {
-                // make symbols or add declarations for intermediate containers
-                var flags_1 = 1536 /* Module */ | 67108864 /* JSContainer */;
-                var excludeFlags_1 = 67215503 /* ValueModuleExcludes */ & ~67108864 /* JSContainer */;
+                : propertyAccess.parent.parent.kind === 274;
+            if (!isPrototypeProperty && (!namespaceSymbol || !(namespaceSymbol.flags & 1920)) && isToplevelNamespaceableInitializer) {
+                var flags_1 = 1536 | 67108864;
+                var excludeFlags_1 = 67215503 & ~67108864;
                 namespaceSymbol = forEachIdentifierInEntityName(propertyAccess.expression, namespaceSymbol, function (id, symbol, parent) {
                     if (symbol) {
                         addDeclarationToSymbol(symbol, id, flags_1);
@@ -27623,29 +22426,17 @@ var ts;
             if (!namespaceSymbol || !isJavascriptContainer(namespaceSymbol)) {
                 return;
             }
-            // Set up the members collection if it doesn't exist already
             var symbolTable = isPrototypeProperty ?
                 (namespaceSymbol.members || (namespaceSymbol.members = ts.createSymbolTable())) :
                 (namespaceSymbol.exports || (namespaceSymbol.exports = ts.createSymbolTable()));
-            // Declare the method/property
-            var jsContainerFlag = isToplevelNamespaceableInitializer ? 67108864 /* JSContainer */ : 0;
+            var jsContainerFlag = isToplevelNamespaceableInitializer ? 67108864 : 0;
             var isMethod = ts.isFunctionLikeDeclaration(ts.getAssignedJavascriptInitializer(propertyAccess));
-            var symbolFlags = (isMethod ? 8192 /* Method */ : 4 /* Property */) | jsContainerFlag;
-            var symbolExcludes = (isMethod ? 67208127 /* MethodExcludes */ : 0 /* PropertyExcludes */) & ~jsContainerFlag;
+            var symbolFlags = (isMethod ? 8192 : 4) | jsContainerFlag;
+            var symbolExcludes = (isMethod ? 67208127 : 0) & ~jsContainerFlag;
             declareSymbol(symbolTable, namespaceSymbol, propertyAccess, symbolFlags, symbolExcludes);
         }
-        /**
-         * Javascript containers are:
-         * - Functions
-         * - classes
-         * - namespaces
-         * - variables initialized with function expressions
-         * -                       with class expressions
-         * -                       with empty object literals
-         * -                       with non-empty object literals if assigned to the prototype property
-         */
         function isJavascriptContainer(symbol) {
-            if (symbol.flags & (16 /* Function */ | 32 /* Class */ | 1024 /* NamespaceModule */)) {
+            if (symbol.flags & (16 | 32 | 1024)) {
                 return true;
             }
             var node = symbol.valueDeclaration;
@@ -27656,7 +22447,7 @@ var ts;
                             undefined;
             if (init) {
                 var isPrototypeAssignment = ts.isPrototypeAccess(ts.isVariableDeclaration(node) ? node.name : ts.isBinaryExpression(node) ? node.left : node);
-                return !!ts.getJavascriptInitializer(ts.isBinaryExpression(init) && init.operatorToken.kind === 54 /* BarBarToken */ ? init.right : init, isPrototypeAssignment);
+                return !!ts.getJavascriptInitializer(ts.isBinaryExpression(init) && init.operatorToken.kind === 54 ? init.right : init, isPrototypeAssignment);
             }
             return false;
         }
@@ -27691,35 +22482,23 @@ var ts;
             }
         }
         function bindCallExpression(node) {
-            // We're only inspecting call expressions to detect CommonJS modules, so we can skip
-            // this check if we've already seen the module indicator
-            if (!file.commonJsModuleIndicator && ts.isRequireCall(node, /*checkArgumentIsStringLiteralLike*/ false)) {
+            if (!file.commonJsModuleIndicator && ts.isRequireCall(node, false)) {
                 setCommonJsModuleIndicator(node);
             }
         }
         function bindClassLikeDeclaration(node) {
-            if (node.kind === 235 /* ClassDeclaration */) {
-                bindBlockScopedDeclaration(node, 32 /* Class */, 68008383 /* ClassExcludes */);
+            if (node.kind === 235) {
+                bindBlockScopedDeclaration(node, 32, 68008383);
             }
             else {
-                var bindingName = node.name ? node.name.escapedText : "__class" /* Class */;
-                bindAnonymousDeclaration(node, 32 /* Class */, bindingName);
-                // Add name of class expression into the map for semantic classifier
+                var bindingName = node.name ? node.name.escapedText : "__class";
+                bindAnonymousDeclaration(node, 32, bindingName);
                 if (node.name) {
                     classifiableNames.set(node.name.escapedText, true);
                 }
             }
             var symbol = node.symbol;
-            // TypeScript 1.0 spec (April 2014): 8.4
-            // Every class automatically contains a static property member named 'prototype', the
-            // type of which is an instantiation of the class type with type Any supplied as a type
-            // argument for each type parameter. It is an error to explicitly declare a static
-            // property member with the name 'prototype'.
-            //
-            // Note: we check for this here because this class may be merging into a module.  The
-            // module might have an exported variable called 'prototype'.  We can't allow that as
-            // that would clash with the built-in 'prototype' for the class.
-            var prototypeSymbol = createSymbol(4 /* Property */ | 4194304 /* Prototype */, "prototype");
+            var prototypeSymbol = createSymbol(4 | 4194304, "prototype");
             var symbolExport = symbol.exports.get(prototypeSymbol.escapedName);
             if (symbolExport) {
                 if (node.name) {
@@ -27732,8 +22511,8 @@ var ts;
         }
         function bindEnumDeclaration(node) {
             return ts.isConst(node)
-                ? bindBlockScopedDeclaration(node, 128 /* ConstEnum */, 68008831 /* ConstEnumExcludes */)
-                : bindBlockScopedDeclaration(node, 256 /* RegularEnum */, 68008191 /* RegularEnumExcludes */);
+                ? bindBlockScopedDeclaration(node, 128, 68008831)
+                : bindBlockScopedDeclaration(node, 256, 68008191);
         }
         function bindVariableDeclarationOrBindingElement(node) {
             if (inStrictMode) {
@@ -27744,81 +22523,68 @@ var ts;
                     bindBlockScopedVariableDeclaration(node);
                 }
                 else if (ts.isParameterDeclaration(node)) {
-                    // It is safe to walk up parent chain to find whether the node is a destructuring parameter declaration
-                    // because its parent chain has already been set up, since parents are set before descending into children.
-                    //
-                    // If node is a binding element in parameter declaration, we need to use ParameterExcludes.
-                    // Using ParameterExcludes flag allows the compiler to report an error on duplicate identifiers in Parameter Declaration
-                    // For example:
-                    //      function foo([a,a]) {} // Duplicate Identifier error
-                    //      function bar(a,a) {}   // Duplicate Identifier error, parameter declaration in this case is handled in bindParameter
-                    //                             // which correctly set excluded symbols
-                    declareSymbolAndAddToSymbolTable(node, 1 /* FunctionScopedVariable */, 67216319 /* ParameterExcludes */);
+                    declareSymbolAndAddToSymbolTable(node, 1, 67216319);
                 }
                 else {
-                    declareSymbolAndAddToSymbolTable(node, 1 /* FunctionScopedVariable */, 67216318 /* FunctionScopedVariableExcludes */);
+                    declareSymbolAndAddToSymbolTable(node, 1, 67216318);
                 }
             }
         }
         function bindParameter(node) {
-            if (node.kind === 293 /* JSDocParameterTag */ && container.kind !== 288 /* JSDocSignature */) {
+            if (node.kind === 293 && container.kind !== 288) {
                 return;
             }
-            if (inStrictMode && !(node.flags & 4194304 /* Ambient */)) {
-                // It is a SyntaxError if the identifier eval or arguments appears within a FormalParameterList of a
-                // strict mode FunctionLikeDeclaration or FunctionExpression(13.1)
+            if (inStrictMode && !(node.flags & 4194304)) {
                 checkStrictModeEvalOrArguments(node, node.name);
             }
             if (ts.isBindingPattern(node.name)) {
-                bindAnonymousDeclaration(node, 1 /* FunctionScopedVariable */, "__" + node.parent.parameters.indexOf(node));
+                bindAnonymousDeclaration(node, 1, "__" + node.parent.parameters.indexOf(node));
             }
             else {
-                declareSymbolAndAddToSymbolTable(node, 1 /* FunctionScopedVariable */, 67216319 /* ParameterExcludes */);
+                declareSymbolAndAddToSymbolTable(node, 1, 67216319);
             }
-            // If this is a property-parameter, then also declare the property symbol into the
-            // containing class.
             if (ts.isParameterPropertyDeclaration(node)) {
                 var classDeclaration = node.parent.parent;
-                declareSymbol(classDeclaration.symbol.members, classDeclaration.symbol, node, 4 /* Property */ | (node.questionToken ? 16777216 /* Optional */ : 0 /* None */), 0 /* PropertyExcludes */);
+                declareSymbol(classDeclaration.symbol.members, classDeclaration.symbol, node, 4 | (node.questionToken ? 16777216 : 0), 0);
             }
         }
         function bindFunctionDeclaration(node) {
-            if (!file.isDeclarationFile && !(node.flags & 4194304 /* Ambient */)) {
+            if (!file.isDeclarationFile && !(node.flags & 4194304)) {
                 if (ts.isAsyncFunction(node)) {
-                    emitFlags |= 1024 /* HasAsyncFunctions */;
+                    emitFlags |= 1024;
                 }
             }
             checkStrictModeFunctionName(node);
             if (inStrictMode) {
                 checkStrictModeFunctionDeclaration(node);
-                bindBlockScopedDeclaration(node, 16 /* Function */, 67215791 /* FunctionExcludes */);
+                bindBlockScopedDeclaration(node, 16, 67215791);
             }
             else {
-                declareSymbolAndAddToSymbolTable(node, 16 /* Function */, 67215791 /* FunctionExcludes */);
+                declareSymbolAndAddToSymbolTable(node, 16, 67215791);
             }
         }
         function bindFunctionExpression(node) {
-            if (!file.isDeclarationFile && !(node.flags & 4194304 /* Ambient */)) {
+            if (!file.isDeclarationFile && !(node.flags & 4194304)) {
                 if (ts.isAsyncFunction(node)) {
-                    emitFlags |= 1024 /* HasAsyncFunctions */;
+                    emitFlags |= 1024;
                 }
             }
             if (currentFlow) {
                 node.flowNode = currentFlow;
             }
             checkStrictModeFunctionName(node);
-            var bindingName = node.name ? node.name.escapedText : "__function" /* Function */;
-            return bindAnonymousDeclaration(node, 16 /* Function */, bindingName);
+            var bindingName = node.name ? node.name.escapedText : "__function";
+            return bindAnonymousDeclaration(node, 16, bindingName);
         }
         function bindPropertyOrMethodOrAccessor(node, symbolFlags, symbolExcludes) {
-            if (!file.isDeclarationFile && !(node.flags & 4194304 /* Ambient */) && ts.isAsyncFunction(node)) {
-                emitFlags |= 1024 /* HasAsyncFunctions */;
+            if (!file.isDeclarationFile && !(node.flags & 4194304) && ts.isAsyncFunction(node)) {
+                emitFlags |= 1024;
             }
             if (currentFlow && ts.isObjectLiteralOrClassExpressionMethod(node)) {
                 node.flowNode = currentFlow;
             }
             return ts.hasDynamicName(node)
-                ? bindAnonymousDeclaration(node, symbolFlags, "__computed" /* Computed */)
+                ? bindAnonymousDeclaration(node, symbolFlags, "__computed")
                 : declareSymbolAndAddToSymbolTable(node, symbolFlags, symbolExcludes);
         }
         function getInferTypeContainer(node) {
@@ -27827,68 +22593,53 @@ var ts;
         }
         function bindTypeParameter(node) {
             if (ts.isJSDocTemplateTag(node.parent)) {
-                var container_1 = ts.find(node.parent.parent.tags, ts.isJSDocTypeAlias) || ts.getHostSignatureFromJSDoc(node.parent); // TODO: GH#18217
+                var container_1 = ts.find(node.parent.parent.tags, ts.isJSDocTypeAlias) || ts.getHostSignatureFromJSDoc(node.parent);
                 if (container_1) {
                     if (!container_1.locals) {
                         container_1.locals = ts.createSymbolTable();
                     }
-                    declareSymbol(container_1.locals, /*parent*/ undefined, node, 262144 /* TypeParameter */, 67639784 /* TypeParameterExcludes */);
+                    declareSymbol(container_1.locals, undefined, node, 262144, 67639784);
                 }
                 else {
-                    declareSymbolAndAddToSymbolTable(node, 262144 /* TypeParameter */, 67639784 /* TypeParameterExcludes */);
+                    declareSymbolAndAddToSymbolTable(node, 262144, 67639784);
                 }
             }
-            else if (node.parent.kind === 172 /* InferType */) {
+            else if (node.parent.kind === 172) {
                 var container_2 = getInferTypeContainer(node.parent);
                 if (container_2) {
                     if (!container_2.locals) {
                         container_2.locals = ts.createSymbolTable();
                     }
-                    declareSymbol(container_2.locals, /*parent*/ undefined, node, 262144 /* TypeParameter */, 67639784 /* TypeParameterExcludes */);
+                    declareSymbol(container_2.locals, undefined, node, 262144, 67639784);
                 }
                 else {
-                    bindAnonymousDeclaration(node, 262144 /* TypeParameter */, getDeclarationName(node)); // TODO: GH#18217
+                    bindAnonymousDeclaration(node, 262144, getDeclarationName(node));
                 }
             }
             else {
-                declareSymbolAndAddToSymbolTable(node, 262144 /* TypeParameter */, 67639784 /* TypeParameterExcludes */);
+                declareSymbolAndAddToSymbolTable(node, 262144, 67639784);
             }
         }
-        // reachability checks
         function shouldReportErrorOnModuleDeclaration(node) {
             var instanceState = getModuleInstanceState(node);
-            return instanceState === 1 /* Instantiated */ || (instanceState === 2 /* ConstEnumOnly */ && !!options.preserveConstEnums);
+            return instanceState === 1 || (instanceState === 2 && !!options.preserveConstEnums);
         }
         function checkUnreachable(node) {
-            if (!(currentFlow.flags & 1 /* Unreachable */)) {
+            if (!(currentFlow.flags & 1)) {
                 return false;
             }
             if (currentFlow === unreachableFlow) {
-                var reportError = 
-                // report error on all statements except empty ones
-                (ts.isStatementButNotDeclaration(node) && node.kind !== 215 /* EmptyStatement */) ||
-                    // report error on class declarations
-                    node.kind === 235 /* ClassDeclaration */ ||
-                    // report error on instantiated modules or const-enums only modules if preserveConstEnums is set
-                    (node.kind === 239 /* ModuleDeclaration */ && shouldReportErrorOnModuleDeclaration(node)) ||
-                    // report error on regular enums and const enums if preserveConstEnums is set
-                    (node.kind === 238 /* EnumDeclaration */ && (!ts.isConstEnumDeclaration(node) || options.preserveConstEnums));
+                var reportError = (ts.isStatementButNotDeclaration(node) && node.kind !== 215) ||
+                    node.kind === 235 ||
+                    (node.kind === 239 && shouldReportErrorOnModuleDeclaration(node)) ||
+                    (node.kind === 238 && (!ts.isConstEnumDeclaration(node) || options.preserveConstEnums));
                 if (reportError) {
                     currentFlow = reportedUnreachableFlow;
                     if (!options.allowUnreachableCode) {
-                        // unreachable code is reported if
-                        // - user has explicitly asked about it AND
-                        // - statement is in not ambient context (statements in ambient context is already an error
-                        //   so we should not report extras) AND
-                        //   - node is not variable statement OR
-                        //   - node is block scoped variable statement OR
-                        //   - node is not block scoped variable statement and at least one variable declaration has initializer
-                        //   Rationale: we don't want to report errors on non-initialized var's since they are hoisted
-                        //   On the other side we do want to report errors on non-initialized 'lets' because of TDZ
                         var isError = ts.unreachableCodeIsError(options) &&
-                            !(node.flags & 4194304 /* Ambient */) &&
+                            !(node.flags & 4194304) &&
                             (!ts.isVariableStatement(node) ||
-                                !!(ts.getCombinedNodeFlags(node.declarationList) & 3 /* BlockScoped */) ||
+                                !!(ts.getCombinedNodeFlags(node.declarationList) & 3) ||
                                 node.declarationList.declarations.some(function (d) { return !!d.initializer; }));
                         errorOrSuggestionOnFirstToken(isError, node, ts.Diagnostics.Unreachable_code_detected);
                     }
@@ -27897,7 +22648,6 @@ var ts;
             return true;
         }
     }
-    /* @internal */
     function isExportsOrModuleExportsOrAlias(sourceFile, node) {
         return ts.isExportsIdentifier(node) ||
             ts.isModuleExportsPropertyAccessExpression(node) ||
@@ -27911,7 +22661,7 @@ var ts;
     }
     function isExportsOrModuleExportsOrAliasOrAssignment(sourceFile, node) {
         return isExportsOrModuleExportsOrAlias(sourceFile, node) ||
-            (ts.isAssignmentExpression(node, /*excludeCompoundAssignment*/ true) && (isExportsOrModuleExportsOrAliasOrAssignment(sourceFile, node.left) || isExportsOrModuleExportsOrAliasOrAssignment(sourceFile, node.right)));
+            (ts.isAssignmentExpression(node, true) && (isExportsOrModuleExportsOrAliasOrAssignment(sourceFile, node.left) || isExportsOrModuleExportsOrAliasOrAssignment(sourceFile, node.right)));
     }
     function lookupSymbolForNameWorker(container, name) {
         var local = container.locals && container.locals.get(name);
@@ -27920,67 +22670,61 @@ var ts;
         }
         return container.symbol && container.symbol.exports && container.symbol.exports.get(name);
     }
-    /**
-     * Computes the transform flags for a node, given the transform flags of its subtree
-     *
-     * @param node The node to analyze
-     * @param subtreeFlags Transform flags computed for this node's subtree
-     */
     function computeTransformFlagsForNode(node, subtreeFlags) {
         var kind = node.kind;
         switch (kind) {
-            case 187 /* CallExpression */:
+            case 187:
                 return computeCallExpression(node, subtreeFlags);
-            case 188 /* NewExpression */:
+            case 188:
                 return computeNewExpression(node, subtreeFlags);
-            case 239 /* ModuleDeclaration */:
+            case 239:
                 return computeModuleDeclaration(node, subtreeFlags);
-            case 191 /* ParenthesizedExpression */:
+            case 191:
                 return computeParenthesizedExpression(node, subtreeFlags);
-            case 200 /* BinaryExpression */:
+            case 200:
                 return computeBinaryExpression(node, subtreeFlags);
-            case 216 /* ExpressionStatement */:
+            case 216:
                 return computeExpressionStatement(node, subtreeFlags);
-            case 149 /* Parameter */:
+            case 149:
                 return computeParameter(node, subtreeFlags);
-            case 193 /* ArrowFunction */:
+            case 193:
                 return computeArrowFunction(node, subtreeFlags);
-            case 192 /* FunctionExpression */:
+            case 192:
                 return computeFunctionExpression(node, subtreeFlags);
-            case 234 /* FunctionDeclaration */:
+            case 234:
                 return computeFunctionDeclaration(node, subtreeFlags);
-            case 232 /* VariableDeclaration */:
+            case 232:
                 return computeVariableDeclaration(node, subtreeFlags);
-            case 233 /* VariableDeclarationList */:
+            case 233:
                 return computeVariableDeclarationList(node, subtreeFlags);
-            case 214 /* VariableStatement */:
+            case 214:
                 return computeVariableStatement(node, subtreeFlags);
-            case 228 /* LabeledStatement */:
+            case 228:
                 return computeLabeledStatement(node, subtreeFlags);
-            case 235 /* ClassDeclaration */:
+            case 235:
                 return computeClassDeclaration(node, subtreeFlags);
-            case 205 /* ClassExpression */:
+            case 205:
                 return computeClassExpression(node, subtreeFlags);
-            case 268 /* HeritageClause */:
+            case 268:
                 return computeHeritageClause(node, subtreeFlags);
-            case 269 /* CatchClause */:
+            case 269:
                 return computeCatchClause(node, subtreeFlags);
-            case 207 /* ExpressionWithTypeArguments */:
+            case 207:
                 return computeExpressionWithTypeArguments(node, subtreeFlags);
-            case 155 /* Constructor */:
+            case 155:
                 return computeConstructor(node, subtreeFlags);
-            case 152 /* PropertyDeclaration */:
+            case 152:
                 return computePropertyDeclaration(node, subtreeFlags);
-            case 154 /* MethodDeclaration */:
+            case 154:
                 return computeMethod(node, subtreeFlags);
-            case 156 /* GetAccessor */:
-            case 157 /* SetAccessor */:
+            case 156:
+            case 157:
                 return computeAccessor(node, subtreeFlags);
-            case 243 /* ImportEqualsDeclaration */:
+            case 243:
                 return computeImportEquals(node, subtreeFlags);
-            case 185 /* PropertyAccessExpression */:
+            case 185:
                 return computePropertyAccess(node, subtreeFlags);
-            case 186 /* ElementAccessExpression */:
+            case 186:
                 return computeElementAccess(node, subtreeFlags);
             default:
                 return computeOther(node, kind, subtreeFlags);
@@ -27991,790 +22735,645 @@ var ts;
         var transformFlags = subtreeFlags;
         var expression = node.expression;
         if (node.typeArguments) {
-            transformFlags |= 3 /* AssertTypeScript */;
+            transformFlags |= 3;
         }
-        if (subtreeFlags & 524288 /* ContainsSpread */
-            || (expression.transformFlags & (134217728 /* Super */ | 268435456 /* ContainsSuper */))) {
-            // If the this node contains a SpreadExpression, or is a super call, then it is an ES6
-            // node.
-            transformFlags |= 192 /* AssertES2015 */;
-            // super property or element accesses could be inside lambdas, etc, and need a captured `this`,
-            // while super keyword for super calls (indicated by TransformFlags.Super) does not (since it can only be top-level in a constructor)
-            if (expression.transformFlags & 268435456 /* ContainsSuper */) {
-                transformFlags |= 16384 /* ContainsLexicalThis */;
+        if (subtreeFlags & 524288
+            || (expression.transformFlags & (134217728 | 268435456))) {
+            transformFlags |= 192;
+            if (expression.transformFlags & 268435456) {
+                transformFlags |= 16384;
             }
         }
-        if (expression.kind === 91 /* ImportKeyword */) {
-            transformFlags |= 67108864 /* ContainsDynamicImport */;
-            // A dynamic 'import()' call that contains a lexical 'this' will
-            // require a captured 'this' when emitting down-level.
-            if (subtreeFlags & 16384 /* ContainsLexicalThis */) {
-                transformFlags |= 32768 /* ContainsCapturedLexicalThis */;
+        if (expression.kind === 91) {
+            transformFlags |= 67108864;
+            if (subtreeFlags & 16384) {
+                transformFlags |= 32768;
             }
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~940049729 /* ArrayLiteralOrCallOrNewExcludes */;
+        node.transformFlags = transformFlags | 536870912;
+        return transformFlags & ~940049729;
     }
     function computeNewExpression(node, subtreeFlags) {
         var transformFlags = subtreeFlags;
         if (node.typeArguments) {
-            transformFlags |= 3 /* AssertTypeScript */;
+            transformFlags |= 3;
         }
-        if (subtreeFlags & 524288 /* ContainsSpread */) {
-            // If the this node contains a SpreadElementExpression then it is an ES6
-            // node.
-            transformFlags |= 192 /* AssertES2015 */;
+        if (subtreeFlags & 524288) {
+            transformFlags |= 192;
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~940049729 /* ArrayLiteralOrCallOrNewExcludes */;
+        node.transformFlags = transformFlags | 536870912;
+        return transformFlags & ~940049729;
     }
     function computeBinaryExpression(node, subtreeFlags) {
         var transformFlags = subtreeFlags;
         var operatorTokenKind = node.operatorToken.kind;
         var leftKind = node.left.kind;
-        if (operatorTokenKind === 58 /* EqualsToken */ && leftKind === 184 /* ObjectLiteralExpression */) {
-            // Destructuring object assignments with are ES2015 syntax
-            // and possibly ESNext if they contain rest
-            transformFlags |= 8 /* AssertESNext */ | 192 /* AssertES2015 */ | 3072 /* AssertDestructuringAssignment */;
+        if (operatorTokenKind === 58 && leftKind === 184) {
+            transformFlags |= 8 | 192 | 3072;
         }
-        else if (operatorTokenKind === 58 /* EqualsToken */ && leftKind === 183 /* ArrayLiteralExpression */) {
-            // Destructuring assignments are ES2015 syntax.
-            transformFlags |= 192 /* AssertES2015 */ | 3072 /* AssertDestructuringAssignment */;
+        else if (operatorTokenKind === 58 && leftKind === 183) {
+            transformFlags |= 192 | 3072;
         }
-        else if (operatorTokenKind === 40 /* AsteriskAsteriskToken */
-            || operatorTokenKind === 62 /* AsteriskAsteriskEqualsToken */) {
-            // Exponentiation is ES2016 syntax.
-            transformFlags |= 32 /* AssertES2016 */;
+        else if (operatorTokenKind === 40
+            || operatorTokenKind === 62) {
+            transformFlags |= 32;
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~939525441 /* NodeExcludes */;
+        node.transformFlags = transformFlags | 536870912;
+        return transformFlags & ~939525441;
     }
     function computeParameter(node, subtreeFlags) {
         var transformFlags = subtreeFlags;
         var name = node.name;
         var initializer = node.initializer;
         var dotDotDotToken = node.dotDotDotToken;
-        // The '?' token, type annotations, decorators, and 'this' parameters are TypeSCript
-        // syntax.
         if (node.questionToken
             || node.type
-            || subtreeFlags & 4096 /* ContainsDecorators */
+            || subtreeFlags & 4096
             || ts.isThisIdentifier(name)) {
-            transformFlags |= 3 /* AssertTypeScript */;
+            transformFlags |= 3;
         }
-        // If a parameter has an accessibility modifier, then it is TypeScript syntax.
-        if (ts.hasModifier(node, 92 /* ParameterPropertyModifier */)) {
-            transformFlags |= 3 /* AssertTypeScript */ | 262144 /* ContainsParameterPropertyAssignments */;
+        if (ts.hasModifier(node, 92)) {
+            transformFlags |= 3 | 262144;
         }
-        // parameters with object rest destructuring are ES Next syntax
-        if (subtreeFlags & 1048576 /* ContainsObjectRest */) {
-            transformFlags |= 8 /* AssertESNext */;
+        if (subtreeFlags & 1048576) {
+            transformFlags |= 8;
         }
-        // If a parameter has an initializer, a binding pattern or a dotDotDot token, then
-        // it is ES6 syntax and its container must emit default value assignments or parameter destructuring downlevel.
-        if (subtreeFlags & 8388608 /* ContainsBindingPattern */ || initializer || dotDotDotToken) {
-            transformFlags |= 192 /* AssertES2015 */ | 131072 /* ContainsDefaultValueAssignments */;
+        if (subtreeFlags & 8388608 || initializer || dotDotDotToken) {
+            transformFlags |= 192 | 131072;
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~939525441 /* ParameterExcludes */;
+        node.transformFlags = transformFlags | 536870912;
+        return transformFlags & ~939525441;
     }
     function computeParenthesizedExpression(node, subtreeFlags) {
         var transformFlags = subtreeFlags;
         var expression = node.expression;
         var expressionKind = expression.kind;
         var expressionTransformFlags = expression.transformFlags;
-        // If the node is synthesized, it means the emitter put the parentheses there,
-        // not the user. If we didn't want them, the emitter would not have put them
-        // there.
-        if (expressionKind === 208 /* AsExpression */
-            || expressionKind === 190 /* TypeAssertionExpression */) {
-            transformFlags |= 3 /* AssertTypeScript */;
+        if (expressionKind === 208
+            || expressionKind === 190) {
+            transformFlags |= 3;
         }
-        // If the expression of a ParenthesizedExpression is a destructuring assignment,
-        // then the ParenthesizedExpression is a destructuring assignment.
-        if (expressionTransformFlags & 1024 /* DestructuringAssignment */) {
-            transformFlags |= 1024 /* DestructuringAssignment */;
+        if (expressionTransformFlags & 1024) {
+            transformFlags |= 1024;
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~536872257 /* OuterExpressionExcludes */;
+        node.transformFlags = transformFlags | 536870912;
+        return transformFlags & ~536872257;
     }
     function computeClassDeclaration(node, subtreeFlags) {
         var transformFlags;
-        if (ts.hasModifier(node, 2 /* Ambient */)) {
-            // An ambient declaration is TypeScript syntax.
-            transformFlags = 3 /* AssertTypeScript */;
+        if (ts.hasModifier(node, 2)) {
+            transformFlags = 3;
         }
         else {
-            // A ClassDeclaration is ES6 syntax.
-            transformFlags = subtreeFlags | 192 /* AssertES2015 */;
-            // A class with a parameter property assignment, property initializer, computed property name, or decorator is
-            // TypeScript syntax.
-            // An exported declaration may be TypeScript syntax, but is handled by the visitor
-            // for a namespace declaration.
-            if ((subtreeFlags & 274432 /* TypeScriptClassSyntaxMask */)
+            transformFlags = subtreeFlags | 192;
+            if ((subtreeFlags & 274432)
                 || node.typeParameters) {
-                transformFlags |= 3 /* AssertTypeScript */;
+                transformFlags |= 3;
             }
-            if (subtreeFlags & 65536 /* ContainsLexicalThisInComputedPropertyName */) {
-                // A computed property name containing `this` might need to be rewritten,
-                // so propagate the ContainsLexicalThis flag upward.
-                transformFlags |= 16384 /* ContainsLexicalThis */;
+            if (subtreeFlags & 65536) {
+                transformFlags |= 16384;
             }
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~942011713 /* ClassExcludes */;
+        node.transformFlags = transformFlags | 536870912;
+        return transformFlags & ~942011713;
     }
     function computeClassExpression(node, subtreeFlags) {
-        // A ClassExpression is ES6 syntax.
-        var transformFlags = subtreeFlags | 192 /* AssertES2015 */;
-        // A class with a parameter property assignment, property initializer, or decorator is
-        // TypeScript syntax.
-        if (subtreeFlags & 274432 /* TypeScriptClassSyntaxMask */
+        var transformFlags = subtreeFlags | 192;
+        if (subtreeFlags & 274432
             || node.typeParameters) {
-            transformFlags |= 3 /* AssertTypeScript */;
+            transformFlags |= 3;
         }
-        if (subtreeFlags & 65536 /* ContainsLexicalThisInComputedPropertyName */) {
-            // A computed property name containing `this` might need to be rewritten,
-            // so propagate the ContainsLexicalThis flag upward.
-            transformFlags |= 16384 /* ContainsLexicalThis */;
+        if (subtreeFlags & 65536) {
+            transformFlags |= 16384;
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~942011713 /* ClassExcludes */;
+        node.transformFlags = transformFlags | 536870912;
+        return transformFlags & ~942011713;
     }
     function computeHeritageClause(node, subtreeFlags) {
         var transformFlags = subtreeFlags;
         switch (node.token) {
-            case 85 /* ExtendsKeyword */:
-                // An `extends` HeritageClause is ES6 syntax.
-                transformFlags |= 192 /* AssertES2015 */;
+            case 85:
+                transformFlags |= 192;
                 break;
-            case 108 /* ImplementsKeyword */:
-                // An `implements` HeritageClause is TypeScript syntax.
-                transformFlags |= 3 /* AssertTypeScript */;
+            case 108:
+                transformFlags |= 3;
                 break;
             default:
                 ts.Debug.fail("Unexpected token for heritage clause");
                 break;
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~939525441 /* NodeExcludes */;
+        node.transformFlags = transformFlags | 536870912;
+        return transformFlags & ~939525441;
     }
     function computeCatchClause(node, subtreeFlags) {
         var transformFlags = subtreeFlags;
         if (!node.variableDeclaration) {
-            transformFlags |= 8 /* AssertESNext */;
+            transformFlags |= 8;
         }
         else if (ts.isBindingPattern(node.variableDeclaration.name)) {
-            transformFlags |= 192 /* AssertES2015 */;
+            transformFlags |= 192;
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~940574017 /* CatchClauseExcludes */;
+        node.transformFlags = transformFlags | 536870912;
+        return transformFlags & ~940574017;
     }
     function computeExpressionWithTypeArguments(node, subtreeFlags) {
-        // An ExpressionWithTypeArguments is ES6 syntax, as it is used in the
-        // extends clause of a class.
-        var transformFlags = subtreeFlags | 192 /* AssertES2015 */;
-        // If an ExpressionWithTypeArguments contains type arguments, then it
-        // is TypeScript syntax.
+        var transformFlags = subtreeFlags | 192;
         if (node.typeArguments) {
-            transformFlags |= 3 /* AssertTypeScript */;
+            transformFlags |= 3;
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~939525441 /* NodeExcludes */;
+        node.transformFlags = transformFlags | 536870912;
+        return transformFlags & ~939525441;
     }
     function computeConstructor(node, subtreeFlags) {
         var transformFlags = subtreeFlags;
-        // TypeScript-specific modifiers and overloads are TypeScript syntax
-        if (ts.hasModifier(node, 2270 /* TypeScriptModifier */)
+        if (ts.hasModifier(node, 2270)
             || !node.body) {
-            transformFlags |= 3 /* AssertTypeScript */;
+            transformFlags |= 3;
         }
-        // function declarations with object rest destructuring are ES Next syntax
-        if (subtreeFlags & 1048576 /* ContainsObjectRest */) {
-            transformFlags |= 8 /* AssertESNext */;
+        if (subtreeFlags & 1048576) {
+            transformFlags |= 8;
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~1003668801 /* ConstructorExcludes */;
+        node.transformFlags = transformFlags | 536870912;
+        return transformFlags & ~1003668801;
     }
     function computeMethod(node, subtreeFlags) {
-        // A MethodDeclaration is ES6 syntax.
-        var transformFlags = subtreeFlags | 192 /* AssertES2015 */;
-        // Decorators, TypeScript-specific modifiers, type parameters, type annotations, and
-        // overloads are TypeScript syntax.
+        var transformFlags = subtreeFlags | 192;
         if (node.decorators
-            || ts.hasModifier(node, 2270 /* TypeScriptModifier */)
+            || ts.hasModifier(node, 2270)
             || node.typeParameters
             || node.type
-            || (node.name && ts.isComputedPropertyName(node.name)) // While computed method names aren't typescript, the TS transform must visit them to emit property declarations correctly
+            || (node.name && ts.isComputedPropertyName(node.name))
             || !node.body) {
-            transformFlags |= 3 /* AssertTypeScript */;
+            transformFlags |= 3;
         }
-        // function declarations with object rest destructuring are ES Next syntax
-        if (subtreeFlags & 1048576 /* ContainsObjectRest */) {
-            transformFlags |= 8 /* AssertESNext */;
+        if (subtreeFlags & 1048576) {
+            transformFlags |= 8;
         }
-        // An async method declaration is ES2017 syntax.
-        if (ts.hasModifier(node, 256 /* Async */)) {
-            transformFlags |= node.asteriskToken ? 8 /* AssertESNext */ : 16 /* AssertES2017 */;
+        if (ts.hasModifier(node, 256)) {
+            transformFlags |= node.asteriskToken ? 8 : 16;
         }
         if (node.asteriskToken) {
-            transformFlags |= 768 /* AssertGenerator */;
+            transformFlags |= 768;
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~1003668801 /* MethodOrAccessorExcludes */;
+        node.transformFlags = transformFlags | 536870912;
+        return transformFlags & ~1003668801;
     }
     function computeAccessor(node, subtreeFlags) {
         var transformFlags = subtreeFlags;
-        // Decorators, TypeScript-specific modifiers, type annotations, and overloads are
-        // TypeScript syntax.
         if (node.decorators
-            || ts.hasModifier(node, 2270 /* TypeScriptModifier */)
+            || ts.hasModifier(node, 2270)
             || node.type
-            || (node.name && ts.isComputedPropertyName(node.name)) // While computed accessor names aren't typescript, the TS transform must visit them to emit property declarations correctly
+            || (node.name && ts.isComputedPropertyName(node.name))
             || !node.body) {
-            transformFlags |= 3 /* AssertTypeScript */;
+            transformFlags |= 3;
         }
-        // function declarations with object rest destructuring are ES Next syntax
-        if (subtreeFlags & 1048576 /* ContainsObjectRest */) {
-            transformFlags |= 8 /* AssertESNext */;
+        if (subtreeFlags & 1048576) {
+            transformFlags |= 8;
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~1003668801 /* MethodOrAccessorExcludes */;
+        node.transformFlags = transformFlags | 536870912;
+        return transformFlags & ~1003668801;
     }
     function computePropertyDeclaration(node, subtreeFlags) {
-        // A PropertyDeclaration is TypeScript syntax.
-        var transformFlags = subtreeFlags | 3 /* AssertTypeScript */;
-        // If the PropertyDeclaration has an initializer or a computed name, we need to inform its ancestor
-        // so that it handle the transformation.
+        var transformFlags = subtreeFlags | 3;
         if (node.initializer || ts.isComputedPropertyName(node.name)) {
-            transformFlags |= 8192 /* ContainsPropertyInitializer */;
+            transformFlags |= 8192;
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~939525441 /* NodeExcludes */;
+        node.transformFlags = transformFlags | 536870912;
+        return transformFlags & ~939525441;
     }
     function computeFunctionDeclaration(node, subtreeFlags) {
         var transformFlags;
         var modifierFlags = ts.getModifierFlags(node);
         var body = node.body;
-        if (!body || (modifierFlags & 2 /* Ambient */)) {
-            // An ambient declaration is TypeScript syntax.
-            // A FunctionDeclaration without a body is an overload and is TypeScript syntax.
-            transformFlags = 3 /* AssertTypeScript */;
+        if (!body || (modifierFlags & 2)) {
+            transformFlags = 3;
         }
         else {
-            transformFlags = subtreeFlags | 33554432 /* ContainsHoistedDeclarationOrCompletion */;
-            // TypeScript-specific modifiers, type parameters, and type annotations are TypeScript
-            // syntax.
-            if (modifierFlags & 2270 /* TypeScriptModifier */
+            transformFlags = subtreeFlags | 33554432;
+            if (modifierFlags & 2270
                 || node.typeParameters
                 || node.type) {
-                transformFlags |= 3 /* AssertTypeScript */;
-            }
-            // An async function declaration is ES2017 syntax.
-            if (modifierFlags & 256 /* Async */) {
-                transformFlags |= node.asteriskToken ? 8 /* AssertESNext */ : 16 /* AssertES2017 */;
-            }
-            // function declarations with object rest destructuring are ES Next syntax
-            if (subtreeFlags & 1048576 /* ContainsObjectRest */) {
-                transformFlags |= 8 /* AssertESNext */;
-            }
-            // If a FunctionDeclaration's subtree has marked the container as needing to capture the
-            // lexical this, or the function contains parameters with initializers, then this node is
-            // ES6 syntax.
-            if (subtreeFlags & 163840 /* ES2015FunctionSyntaxMask */) {
-                transformFlags |= 192 /* AssertES2015 */;
-            }
-            // If a FunctionDeclaration is generator function and is the body of a
-            // transformed async function, then this node can be transformed to a
-            // down-level generator.
-            // Currently we do not support transforming any other generator fucntions
-            // down level.
+                transformFlags |= 3;
+            }
+            if (modifierFlags & 256) {
+                transformFlags |= node.asteriskToken ? 8 : 16;
+            }
+            if (subtreeFlags & 1048576) {
+                transformFlags |= 8;
+            }
+            if (subtreeFlags & 163840) {
+                transformFlags |= 192;
+            }
             if (node.asteriskToken) {
-                transformFlags |= 768 /* AssertGenerator */;
+                transformFlags |= 768;
             }
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~1003935041 /* FunctionExcludes */;
+        node.transformFlags = transformFlags | 536870912;
+        return transformFlags & ~1003935041;
     }
     function computeFunctionExpression(node, subtreeFlags) {
         var transformFlags = subtreeFlags;
-        // TypeScript-specific modifiers, type parameters, and type annotations are TypeScript
-        // syntax.
-        if (ts.hasModifier(node, 2270 /* TypeScriptModifier */)
+        if (ts.hasModifier(node, 2270)
             || node.typeParameters
             || node.type) {
-            transformFlags |= 3 /* AssertTypeScript */;
+            transformFlags |= 3;
         }
-        // An async function expression is ES2017 syntax.
-        if (ts.hasModifier(node, 256 /* Async */)) {
-            transformFlags |= node.asteriskToken ? 8 /* AssertESNext */ : 16 /* AssertES2017 */;
+        if (ts.hasModifier(node, 256)) {
+            transformFlags |= node.asteriskToken ? 8 : 16;
         }
-        // function expressions with object rest destructuring are ES Next syntax
-        if (subtreeFlags & 1048576 /* ContainsObjectRest */) {
-            transformFlags |= 8 /* AssertESNext */;
+        if (subtreeFlags & 1048576) {
+            transformFlags |= 8;
         }
-        // If a FunctionExpression's subtree has marked the container as needing to capture the
-        // lexical this, or the function contains parameters with initializers, then this node is
-        // ES6 syntax.
-        if (subtreeFlags & 163840 /* ES2015FunctionSyntaxMask */) {
-            transformFlags |= 192 /* AssertES2015 */;
+        if (subtreeFlags & 163840) {
+            transformFlags |= 192;
         }
-        // If a FunctionExpression is generator function and is the body of a
-        // transformed async function, then this node can be transformed to a
-        // down-level generator.
         if (node.asteriskToken) {
-            transformFlags |= 768 /* AssertGenerator */;
+            transformFlags |= 768;
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~1003935041 /* FunctionExcludes */;
+        node.transformFlags = transformFlags | 536870912;
+        return transformFlags & ~1003935041;
     }
     function computeArrowFunction(node, subtreeFlags) {
-        // An ArrowFunction is ES6 syntax, and excludes markers that should not escape the scope of an ArrowFunction.
-        var transformFlags = subtreeFlags | 192 /* AssertES2015 */;
-        // TypeScript-specific modifiers, type parameters, and type annotations are TypeScript
-        // syntax.
-        if (ts.hasModifier(node, 2270 /* TypeScriptModifier */)
+        var transformFlags = subtreeFlags | 192;
+        if (ts.hasModifier(node, 2270)
             || node.typeParameters
             || node.type) {
-            transformFlags |= 3 /* AssertTypeScript */;
+            transformFlags |= 3;
         }
-        // An async arrow function is ES2017 syntax.
-        if (ts.hasModifier(node, 256 /* Async */)) {
-            transformFlags |= 16 /* AssertES2017 */;
+        if (ts.hasModifier(node, 256)) {
+            transformFlags |= 16;
         }
-        // arrow functions with object rest destructuring are ES Next syntax
-        if (subtreeFlags & 1048576 /* ContainsObjectRest */) {
-            transformFlags |= 8 /* AssertESNext */;
+        if (subtreeFlags & 1048576) {
+            transformFlags |= 8;
         }
-        // If an ArrowFunction contains a lexical this, its container must capture the lexical this.
-        if (subtreeFlags & 16384 /* ContainsLexicalThis */) {
-            transformFlags |= 32768 /* ContainsCapturedLexicalThis */;
+        if (subtreeFlags & 16384) {
+            transformFlags |= 32768;
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~1003902273 /* ArrowFunctionExcludes */;
+        node.transformFlags = transformFlags | 536870912;
+        return transformFlags & ~1003902273;
     }
     function computePropertyAccess(node, subtreeFlags) {
         var transformFlags = subtreeFlags;
-        // If a PropertyAccessExpression starts with a super keyword, then it is
-        // ES6 syntax, and requires a lexical `this` binding.
-        if (transformFlags & 134217728 /* Super */) {
-            transformFlags ^= 134217728 /* Super */;
-            transformFlags |= 268435456 /* ContainsSuper */;
+        if (transformFlags & 134217728) {
+            transformFlags ^= 134217728;
+            transformFlags |= 268435456;
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~671089985 /* PropertyAccessExcludes */;
+        node.transformFlags = transformFlags | 536870912;
+        return transformFlags & ~671089985;
     }
     function computeElementAccess(node, subtreeFlags) {
         var transformFlags = subtreeFlags;
         var expression = node.expression;
-        var expressionFlags = expression.transformFlags; // We do not want to aggregate flags from the argument expression for super/this capturing
-        // If an ElementAccessExpression starts with a super keyword, then it is
-        // ES6 syntax, and requires a lexical `this` binding.
-        if (expressionFlags & 134217728 /* Super */) {
-            transformFlags &= ~134217728 /* Super */;
-            transformFlags |= 268435456 /* ContainsSuper */;
+        var expressionFlags = expression.transformFlags;
+        if (expressionFlags & 134217728) {
+            transformFlags &= ~134217728;
+            transformFlags |= 268435456;
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~671089985 /* PropertyAccessExcludes */;
+        node.transformFlags = transformFlags | 536870912;
+        return transformFlags & ~671089985;
     }
     function computeVariableDeclaration(node, subtreeFlags) {
         var transformFlags = subtreeFlags;
-        transformFlags |= 192 /* AssertES2015 */ | 8388608 /* ContainsBindingPattern */;
-        // A VariableDeclaration containing ObjectRest is ESNext syntax
-        if (subtreeFlags & 1048576 /* ContainsObjectRest */) {
-            transformFlags |= 8 /* AssertESNext */;
+        transformFlags |= 192 | 8388608;
+        if (subtreeFlags & 1048576) {
+            transformFlags |= 8;
         }
-        // Type annotations are TypeScript syntax.
         if (node.type) {
-            transformFlags |= 3 /* AssertTypeScript */;
+            transformFlags |= 3;
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~939525441 /* NodeExcludes */;
+        node.transformFlags = transformFlags | 536870912;
+        return transformFlags & ~939525441;
     }
     function computeVariableStatement(node, subtreeFlags) {
         var transformFlags;
         var declarationListTransformFlags = node.declarationList.transformFlags;
-        // An ambient declaration is TypeScript syntax.
-        if (ts.hasModifier(node, 2 /* Ambient */)) {
-            transformFlags = 3 /* AssertTypeScript */;
+        if (ts.hasModifier(node, 2)) {
+            transformFlags = 3;
         }
         else {
             transformFlags = subtreeFlags;
-            if (declarationListTransformFlags & 8388608 /* ContainsBindingPattern */) {
-                transformFlags |= 192 /* AssertES2015 */;
+            if (declarationListTransformFlags & 8388608) {
+                transformFlags |= 192;
             }
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~939525441 /* NodeExcludes */;
+        node.transformFlags = transformFlags | 536870912;
+        return transformFlags & ~939525441;
     }
     function computeLabeledStatement(node, subtreeFlags) {
         var transformFlags = subtreeFlags;
-        // A labeled statement containing a block scoped binding *may* need to be transformed from ES6.
-        if (subtreeFlags & 4194304 /* ContainsBlockScopedBinding */
-            && ts.isIterationStatement(node, /*lookInLabeledStatements*/ true)) {
-            transformFlags |= 192 /* AssertES2015 */;
+        if (subtreeFlags & 4194304
+            && ts.isIterationStatement(node, true)) {
+            transformFlags |= 192;
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~939525441 /* NodeExcludes */;
+        node.transformFlags = transformFlags | 536870912;
+        return transformFlags & ~939525441;
     }
     function computeImportEquals(node, subtreeFlags) {
         var transformFlags = subtreeFlags;
-        // An ImportEqualsDeclaration with a namespace reference is TypeScript.
         if (!ts.isExternalModuleImportEqualsDeclaration(node)) {
-            transformFlags |= 3 /* AssertTypeScript */;
+            transformFlags |= 3;
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~939525441 /* NodeExcludes */;
+        node.transformFlags = transformFlags | 536870912;
+        return transformFlags & ~939525441;
     }
     function computeExpressionStatement(node, subtreeFlags) {
         var transformFlags = subtreeFlags;
-        // If the expression of an expression statement is a destructuring assignment,
-        // then we treat the statement as ES6 so that we can indicate that we do not
-        // need to hold on to the right-hand side.
-        if (node.expression.transformFlags & 1024 /* DestructuringAssignment */) {
-            transformFlags |= 192 /* AssertES2015 */;
+        if (node.expression.transformFlags & 1024) {
+            transformFlags |= 192;
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~939525441 /* NodeExcludes */;
+        node.transformFlags = transformFlags | 536870912;
+        return transformFlags & ~939525441;
     }
     function computeModuleDeclaration(node, subtreeFlags) {
-        var transformFlags = 3 /* AssertTypeScript */;
+        var transformFlags = 3;
         var modifierFlags = ts.getModifierFlags(node);
-        if ((modifierFlags & 2 /* Ambient */) === 0) {
+        if ((modifierFlags & 2) === 0) {
             transformFlags |= subtreeFlags;
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~977327425 /* ModuleExcludes */;
+        node.transformFlags = transformFlags | 536870912;
+        return transformFlags & ~977327425;
     }
     function computeVariableDeclarationList(node, subtreeFlags) {
-        var transformFlags = subtreeFlags | 33554432 /* ContainsHoistedDeclarationOrCompletion */;
-        if (subtreeFlags & 8388608 /* ContainsBindingPattern */) {
-            transformFlags |= 192 /* AssertES2015 */;
+        var transformFlags = subtreeFlags | 33554432;
+        if (subtreeFlags & 8388608) {
+            transformFlags |= 192;
         }
-        // If a VariableDeclarationList is `let` or `const`, then it is ES6 syntax.
-        if (node.flags & 3 /* BlockScoped */) {
-            transformFlags |= 192 /* AssertES2015 */ | 4194304 /* ContainsBlockScopedBinding */;
+        if (node.flags & 3) {
+            transformFlags |= 192 | 4194304;
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~948962625 /* VariableDeclarationListExcludes */;
+        node.transformFlags = transformFlags | 536870912;
+        return transformFlags & ~948962625;
     }
     function computeOther(node, kind, subtreeFlags) {
-        // Mark transformations needed for each node
         var transformFlags = subtreeFlags;
-        var excludeFlags = 939525441 /* NodeExcludes */;
+        var excludeFlags = 939525441;
         switch (kind) {
-            case 120 /* AsyncKeyword */:
-            case 197 /* AwaitExpression */:
-                // async/await is ES2017 syntax, but may be ESNext syntax (for async generators)
-                transformFlags |= 8 /* AssertESNext */ | 16 /* AssertES2017 */;
+            case 120:
+            case 197:
+                transformFlags |= 8 | 16;
                 break;
-            case 190 /* TypeAssertionExpression */:
-            case 208 /* AsExpression */:
-            case 301 /* PartiallyEmittedExpression */:
-                // These nodes are TypeScript syntax.
-                transformFlags |= 3 /* AssertTypeScript */;
-                excludeFlags = 536872257 /* OuterExpressionExcludes */;
+            case 190:
+            case 208:
+            case 301:
+                transformFlags |= 3;
+                excludeFlags = 536872257;
                 break;
-            case 114 /* PublicKeyword */:
-            case 112 /* PrivateKeyword */:
-            case 113 /* ProtectedKeyword */:
-            case 117 /* AbstractKeyword */:
-            case 124 /* DeclareKeyword */:
-            case 76 /* ConstKeyword */:
-            case 238 /* EnumDeclaration */:
-            case 273 /* EnumMember */:
-            case 209 /* NonNullExpression */:
-            case 132 /* ReadonlyKeyword */:
-                // These nodes are TypeScript syntax.
-                transformFlags |= 3 /* AssertTypeScript */;
+            case 114:
+            case 112:
+            case 113:
+            case 117:
+            case 124:
+            case 76:
+            case 238:
+            case 273:
+            case 209:
+            case 132:
+                transformFlags |= 3;
                 break;
-            case 255 /* JsxElement */:
-            case 256 /* JsxSelfClosingElement */:
-            case 257 /* JsxOpeningElement */:
-            case 10 /* JsxText */:
-            case 258 /* JsxClosingElement */:
-            case 259 /* JsxFragment */:
-            case 260 /* JsxOpeningFragment */:
-            case 261 /* JsxClosingFragment */:
-            case 262 /* JsxAttribute */:
-            case 263 /* JsxAttributes */:
-            case 264 /* JsxSpreadAttribute */:
-            case 265 /* JsxExpression */:
-                // These nodes are Jsx syntax.
-                transformFlags |= 4 /* AssertJsx */;
+            case 255:
+            case 256:
+            case 257:
+            case 10:
+            case 258:
+            case 259:
+            case 260:
+            case 261:
+            case 262:
+            case 263:
+            case 264:
+            case 265:
+                transformFlags |= 4;
                 break;
-            case 13 /* NoSubstitutionTemplateLiteral */:
-            case 14 /* TemplateHead */:
-            case 15 /* TemplateMiddle */:
-            case 16 /* TemplateTail */:
-            case 202 /* TemplateExpression */:
-            case 189 /* TaggedTemplateExpression */:
-            case 271 /* ShorthandPropertyAssignment */:
-            case 115 /* StaticKeyword */:
-            case 210 /* MetaProperty */:
-                // These nodes are ES6 syntax.
-                transformFlags |= 192 /* AssertES2015 */;
+            case 13:
+            case 14:
+            case 15:
+            case 16:
+            case 202:
+            case 189:
+            case 271:
+            case 115:
+            case 210:
+                transformFlags |= 192;
                 break;
-            case 9 /* StringLiteral */:
+            case 9:
                 if (node.hasExtendedUnicodeEscape) {
-                    transformFlags |= 192 /* AssertES2015 */;
+                    transformFlags |= 192;
                 }
                 break;
-            case 8 /* NumericLiteral */:
-                if (node.numericLiteralFlags & 384 /* BinaryOrOctalSpecifier */) {
-                    transformFlags |= 192 /* AssertES2015 */;
+            case 8:
+                if (node.numericLiteralFlags & 384) {
+                    transformFlags |= 192;
                 }
                 break;
-            case 222 /* ForOfStatement */:
-                // This node is either ES2015 syntax or ES2017 syntax (if it is a for-await-of).
+            case 222:
                 if (node.awaitModifier) {
-                    transformFlags |= 8 /* AssertESNext */;
+                    transformFlags |= 8;
                 }
-                transformFlags |= 192 /* AssertES2015 */;
+                transformFlags |= 192;
                 break;
-            case 203 /* YieldExpression */:
-                // This node is either ES2015 syntax (in a generator) or ES2017 syntax (in an async
-                // generator).
-                transformFlags |= 8 /* AssertESNext */ | 192 /* AssertES2015 */ | 16777216 /* ContainsYield */;
+            case 203:
+                transformFlags |= 8 | 192 | 16777216;
                 break;
-            case 119 /* AnyKeyword */:
-            case 134 /* NumberKeyword */:
-            case 131 /* NeverKeyword */:
-            case 135 /* ObjectKeyword */:
-            case 137 /* StringKeyword */:
-            case 122 /* BooleanKeyword */:
-            case 138 /* SymbolKeyword */:
-            case 105 /* VoidKeyword */:
-            case 148 /* TypeParameter */:
-            case 151 /* PropertySignature */:
-            case 153 /* MethodSignature */:
-            case 158 /* CallSignature */:
-            case 159 /* ConstructSignature */:
-            case 160 /* IndexSignature */:
-            case 161 /* TypePredicate */:
-            case 162 /* TypeReference */:
-            case 163 /* FunctionType */:
-            case 164 /* ConstructorType */:
-            case 165 /* TypeQuery */:
-            case 166 /* TypeLiteral */:
-            case 167 /* ArrayType */:
-            case 168 /* TupleType */:
-            case 169 /* UnionType */:
-            case 170 /* IntersectionType */:
-            case 171 /* ConditionalType */:
-            case 172 /* InferType */:
-            case 173 /* ParenthesizedType */:
-            case 236 /* InterfaceDeclaration */:
-            case 237 /* TypeAliasDeclaration */:
-            case 174 /* ThisType */:
-            case 175 /* TypeOperator */:
-            case 176 /* IndexedAccessType */:
-            case 177 /* MappedType */:
-            case 178 /* LiteralType */:
-            case 242 /* NamespaceExportDeclaration */:
-                // Types and signatures are TypeScript syntax, and exclude all other facts.
-                transformFlags = 3 /* AssertTypeScript */;
-                excludeFlags = -3 /* TypeExcludes */;
+            case 119:
+            case 134:
+            case 131:
+            case 135:
+            case 137:
+            case 122:
+            case 138:
+            case 105:
+            case 148:
+            case 151:
+            case 153:
+            case 158:
+            case 159:
+            case 160:
+            case 161:
+            case 162:
+            case 163:
+            case 164:
+            case 165:
+            case 166:
+            case 167:
+            case 168:
+            case 169:
+            case 170:
+            case 171:
+            case 172:
+            case 173:
+            case 236:
+            case 237:
+            case 174:
+            case 175:
+            case 176:
+            case 177:
+            case 178:
+            case 242:
+                transformFlags = 3;
+                excludeFlags = -3;
                 break;
-            case 147 /* ComputedPropertyName */:
-                // Even though computed property names are ES6, we don't treat them as such.
-                // This is so that they can flow through PropertyName transforms unaffected.
-                // Instead, we mark the container as ES6, so that it can properly handle the transform.
-                transformFlags |= 2097152 /* ContainsComputedPropertyName */;
-                if (subtreeFlags & 16384 /* ContainsLexicalThis */) {
-                    // A computed method name like `[this.getName()](x: string) { ... }` needs to
-                    // distinguish itself from the normal case of a method body containing `this`:
-                    // `this` inside a method doesn't need to be rewritten (the method provides `this`),
-                    // whereas `this` inside a computed name *might* need to be rewritten if the class/object
-                    // is inside an arrow function:
-                    // `_this = this; () => class K { [_this.getName()]() { ... } }`
-                    // To make this distinction, use ContainsLexicalThisInComputedPropertyName
-                    // instead of ContainsLexicalThis for computed property names
-                    transformFlags |= 65536 /* ContainsLexicalThisInComputedPropertyName */;
+            case 147:
+                transformFlags |= 2097152;
+                if (subtreeFlags & 16384) {
+                    transformFlags |= 65536;
                 }
                 break;
-            case 204 /* SpreadElement */:
-                transformFlags |= 192 /* AssertES2015 */ | 524288 /* ContainsSpread */;
+            case 204:
+                transformFlags |= 192 | 524288;
                 break;
-            case 272 /* SpreadAssignment */:
-                transformFlags |= 8 /* AssertESNext */ | 1048576 /* ContainsObjectSpread */;
+            case 272:
+                transformFlags |= 8 | 1048576;
                 break;
-            case 97 /* SuperKeyword */:
-                // This node is ES6 syntax.
-                transformFlags |= 192 /* AssertES2015 */ | 134217728 /* Super */;
-                excludeFlags = 536872257 /* OuterExpressionExcludes */; // must be set to persist `Super`
+            case 97:
+                transformFlags |= 192 | 134217728;
+                excludeFlags = 536872257;
                 break;
-            case 99 /* ThisKeyword */:
-                // Mark this node and its ancestors as containing a lexical `this` keyword.
-                transformFlags |= 16384 /* ContainsLexicalThis */;
+            case 99:
+                transformFlags |= 16384;
                 break;
-            case 180 /* ObjectBindingPattern */:
-                transformFlags |= 192 /* AssertES2015 */ | 8388608 /* ContainsBindingPattern */;
-                if (subtreeFlags & 524288 /* ContainsRest */) {
-                    transformFlags |= 8 /* AssertESNext */ | 1048576 /* ContainsObjectRest */;
+            case 180:
+                transformFlags |= 192 | 8388608;
+                if (subtreeFlags & 524288) {
+                    transformFlags |= 8 | 1048576;
                 }
-                excludeFlags = 940049729 /* BindingPatternExcludes */;
+                excludeFlags = 940049729;
                 break;
-            case 181 /* ArrayBindingPattern */:
-                transformFlags |= 192 /* AssertES2015 */ | 8388608 /* ContainsBindingPattern */;
-                excludeFlags = 940049729 /* BindingPatternExcludes */;
+            case 181:
+                transformFlags |= 192 | 8388608;
+                excludeFlags = 940049729;
                 break;
-            case 182 /* BindingElement */:
-                transformFlags |= 192 /* AssertES2015 */;
+            case 182:
+                transformFlags |= 192;
                 if (node.dotDotDotToken) {
-                    transformFlags |= 524288 /* ContainsRest */;
+                    transformFlags |= 524288;
                 }
                 break;
-            case 150 /* Decorator */:
-                // This node is TypeScript syntax, and marks its container as also being TypeScript syntax.
-                transformFlags |= 3 /* AssertTypeScript */ | 4096 /* ContainsDecorators */;
+            case 150:
+                transformFlags |= 3 | 4096;
                 break;
-            case 184 /* ObjectLiteralExpression */:
-                excludeFlags = 942740801 /* ObjectLiteralExcludes */;
-                if (subtreeFlags & 2097152 /* ContainsComputedPropertyName */) {
-                    // If an ObjectLiteralExpression contains a ComputedPropertyName, then it
-                    // is an ES6 node.
-                    transformFlags |= 192 /* AssertES2015 */;
-                }
-                if (subtreeFlags & 65536 /* ContainsLexicalThisInComputedPropertyName */) {
-                    // A computed property name containing `this` might need to be rewritten,
-                    // so propagate the ContainsLexicalThis flag upward.
-                    transformFlags |= 16384 /* ContainsLexicalThis */;
-                }
-                if (subtreeFlags & 1048576 /* ContainsObjectSpread */) {
-                    // If an ObjectLiteralExpression contains a spread element, then it
-                    // is an ES next node.
-                    transformFlags |= 8 /* AssertESNext */;
+            case 184:
+                excludeFlags = 942740801;
+                if (subtreeFlags & 2097152) {
+                    transformFlags |= 192;
+                }
+                if (subtreeFlags & 65536) {
+                    transformFlags |= 16384;
+                }
+                if (subtreeFlags & 1048576) {
+                    transformFlags |= 8;
                 }
                 break;
-            case 183 /* ArrayLiteralExpression */:
-            case 188 /* NewExpression */:
-                excludeFlags = 940049729 /* ArrayLiteralOrCallOrNewExcludes */;
-                if (subtreeFlags & 524288 /* ContainsSpread */) {
-                    // If the this node contains a SpreadExpression, then it is an ES6
-                    // node.
-                    transformFlags |= 192 /* AssertES2015 */;
+            case 183:
+            case 188:
+                excludeFlags = 940049729;
+                if (subtreeFlags & 524288) {
+                    transformFlags |= 192;
                 }
                 break;
-            case 218 /* DoStatement */:
-            case 219 /* WhileStatement */:
-            case 220 /* ForStatement */:
-            case 221 /* ForInStatement */:
-                // A loop containing a block scoped binding *may* need to be transformed from ES6.
-                if (subtreeFlags & 4194304 /* ContainsBlockScopedBinding */) {
-                    transformFlags |= 192 /* AssertES2015 */;
+            case 218:
+            case 219:
+            case 220:
+            case 221:
+                if (subtreeFlags & 4194304) {
+                    transformFlags |= 192;
                 }
                 break;
-            case 274 /* SourceFile */:
-                if (subtreeFlags & 32768 /* ContainsCapturedLexicalThis */) {
-                    transformFlags |= 192 /* AssertES2015 */;
+            case 274:
+                if (subtreeFlags & 32768) {
+                    transformFlags |= 192;
                 }
                 break;
-            case 225 /* ReturnStatement */:
-                // Return statements may require an `await` in ESNext.
-                transformFlags |= 33554432 /* ContainsHoistedDeclarationOrCompletion */ | 8 /* AssertESNext */;
+            case 225:
+                transformFlags |= 33554432 | 8;
                 break;
-            case 223 /* ContinueStatement */:
-            case 224 /* BreakStatement */:
-                transformFlags |= 33554432 /* ContainsHoistedDeclarationOrCompletion */;
+            case 223:
+            case 224:
+                transformFlags |= 33554432;
                 break;
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        node.transformFlags = transformFlags | 536870912;
         return transformFlags & ~excludeFlags;
     }
-    /**
-     * Gets the transform flags to exclude when unioning the transform flags of a subtree.
-     *
-     * NOTE: This needs to be kept up-to-date with the exclusions used in `computeTransformFlagsForNode`.
-     *       For performance reasons, `computeTransformFlagsForNode` uses local constant values rather
-     *       than calling this function.
-     */
-    /* @internal */
     function getTransformFlagsSubtreeExclusions(kind) {
-        if (kind >= 161 /* FirstTypeNode */ && kind <= 179 /* LastTypeNode */) {
-            return -3 /* TypeExcludes */;
+        if (kind >= 161 && kind <= 179) {
+            return -3;
         }
         switch (kind) {
-            case 187 /* CallExpression */:
-            case 188 /* NewExpression */:
-            case 183 /* ArrayLiteralExpression */:
-                return 940049729 /* ArrayLiteralOrCallOrNewExcludes */;
-            case 239 /* ModuleDeclaration */:
-                return 977327425 /* ModuleExcludes */;
-            case 149 /* Parameter */:
-                return 939525441 /* ParameterExcludes */;
-            case 193 /* ArrowFunction */:
-                return 1003902273 /* ArrowFunctionExcludes */;
-            case 192 /* FunctionExpression */:
-            case 234 /* FunctionDeclaration */:
-                return 1003935041 /* FunctionExcludes */;
-            case 233 /* VariableDeclarationList */:
-                return 948962625 /* VariableDeclarationListExcludes */;
-            case 235 /* ClassDeclaration */:
-            case 205 /* ClassExpression */:
-                return 942011713 /* ClassExcludes */;
-            case 155 /* Constructor */:
-                return 1003668801 /* ConstructorExcludes */;
-            case 154 /* MethodDeclaration */:
-            case 156 /* GetAccessor */:
-            case 157 /* SetAccessor */:
-                return 1003668801 /* MethodOrAccessorExcludes */;
-            case 119 /* AnyKeyword */:
-            case 134 /* NumberKeyword */:
-            case 131 /* NeverKeyword */:
-            case 137 /* StringKeyword */:
-            case 135 /* ObjectKeyword */:
-            case 122 /* BooleanKeyword */:
-            case 138 /* SymbolKeyword */:
-            case 105 /* VoidKeyword */:
-            case 148 /* TypeParameter */:
-            case 151 /* PropertySignature */:
-            case 153 /* MethodSignature */:
-            case 158 /* CallSignature */:
-            case 159 /* ConstructSignature */:
-            case 160 /* IndexSignature */:
-            case 236 /* InterfaceDeclaration */:
-            case 237 /* TypeAliasDeclaration */:
-                return -3 /* TypeExcludes */;
-            case 184 /* ObjectLiteralExpression */:
-                return 942740801 /* ObjectLiteralExcludes */;
-            case 269 /* CatchClause */:
-                return 940574017 /* CatchClauseExcludes */;
-            case 180 /* ObjectBindingPattern */:
-            case 181 /* ArrayBindingPattern */:
-                return 940049729 /* BindingPatternExcludes */;
-            case 190 /* TypeAssertionExpression */:
-            case 208 /* AsExpression */:
-            case 301 /* PartiallyEmittedExpression */:
-            case 191 /* ParenthesizedExpression */:
-            case 97 /* SuperKeyword */:
-                return 536872257 /* OuterExpressionExcludes */;
-            case 185 /* PropertyAccessExpression */:
-            case 186 /* ElementAccessExpression */:
-                return 671089985 /* PropertyAccessExcludes */;
+            case 187:
+            case 188:
+            case 183:
+                return 940049729;
+            case 239:
+                return 977327425;
+            case 149:
+                return 939525441;
+            case 193:
+                return 1003902273;
+            case 192:
+            case 234:
+                return 1003935041;
+            case 233:
+                return 948962625;
+            case 235:
+            case 205:
+                return 942011713;
+            case 155:
+                return 1003668801;
+            case 154:
+            case 156:
+            case 157:
+                return 1003668801;
+            case 119:
+            case 134:
+            case 131:
+            case 137:
+            case 135:
+            case 122:
+            case 138:
+            case 105:
+            case 148:
+            case 151:
+            case 153:
+            case 158:
+            case 159:
+            case 160:
+            case 236:
+            case 237:
+                return -3;
+            case 184:
+                return 942740801;
+            case 269:
+                return 940574017;
+            case 180:
+            case 181:
+                return 940049729;
+            case 190:
+            case 208:
+            case 301:
+            case 191:
+            case 97:
+                return 536872257;
+            case 185:
+            case 186:
+                return 671089985;
             default:
-                return 939525441 /* NodeExcludes */;
+                return 939525441;
         }
     }
     ts.getTransformFlagsSubtreeExclusions = getTransformFlagsSubtreeExclusions;
-    /**
-     * "Binds" JSDoc nodes in TypeScript code.
-     * Since we will never create symbols for JSDoc, we just set parent pointers instead.
-     */
     function setParentPointers(parent, child) {
         child.parent = parent;
         ts.forEachChild(child, function (grandchild) { return setParentPointers(child, grandchild); });
     }
 })(ts || (ts = {}));
-/** @internal */
 var ts;
 (function (ts) {
     function createGetSymbolWalker(getRestTypeOfSignature, getTypePredicateOfSignature, getReturnTypeOfSignature, getBaseTypes, resolveStructuredTypeMembers, getTypeOfSymbol, getResolvedSymbol, getIndexTypeOfStructuredType, getConstraintFromTypeParameter, getFirstIdentifier) {
         return getSymbolWalker;
         function getSymbolWalker(accept) {
             if (accept === void 0) { accept = function () { return true; }; }
-            var visitedTypes = []; // Sparse array from id to type
-            var visitedSymbols = []; // Sparse array from id to symbol
+            var visitedTypes = [];
+            var visitedSymbols = [];
             return {
                 walkType: function (type) {
                     try {
@@ -28805,38 +23404,35 @@ var ts;
                     return;
                 }
                 visitedTypes[type.id] = type;
-                // Reuse visitSymbol to visit the type's symbol,
-                //  but be sure to bail on recuring into the type if accept declines the symbol.
                 var shouldBail = visitSymbol(type.symbol);
                 if (shouldBail)
                     return;
-                // Visit the type's related types, if any
-                if (type.flags & 131072 /* Object */) {
+                if (type.flags & 131072) {
                     var objectType = type;
                     var objectFlags = objectType.objectFlags;
-                    if (objectFlags & 4 /* Reference */) {
+                    if (objectFlags & 4) {
                         visitTypeReference(type);
                     }
-                    if (objectFlags & 32 /* Mapped */) {
+                    if (objectFlags & 32) {
                         visitMappedType(type);
                     }
-                    if (objectFlags & (1 /* Class */ | 2 /* Interface */)) {
+                    if (objectFlags & (1 | 2)) {
                         visitInterfaceType(type);
                     }
-                    if (objectFlags & (8 /* Tuple */ | 16 /* Anonymous */)) {
+                    if (objectFlags & (8 | 16)) {
                         visitObjectType(objectType);
                     }
                 }
-                if (type.flags & 65536 /* TypeParameter */) {
+                if (type.flags & 65536) {
                     visitTypeParameter(type);
                 }
-                if (type.flags & 786432 /* UnionOrIntersection */) {
+                if (type.flags & 786432) {
                     visitUnionOrIntersectionType(type);
                 }
-                if (type.flags & 1048576 /* Index */) {
+                if (type.flags & 1048576) {
                     visitIndexType(type);
                 }
-                if (type.flags & 2097152 /* IndexedAccess */) {
+                if (type.flags & 2097152) {
                     visitIndexedAccessType(type);
                 }
             }
@@ -28884,11 +23480,10 @@ var ts;
                 visitType(interfaceT.thisType);
             }
             function visitObjectType(type) {
-                var stringIndexType = getIndexTypeOfStructuredType(type, 0 /* String */);
+                var stringIndexType = getIndexTypeOfStructuredType(type, 0);
                 visitType(stringIndexType);
-                var numberIndexType = getIndexTypeOfStructuredType(type, 1 /* Number */);
+                var numberIndexType = getIndexTypeOfStructuredType(type, 1);
                 visitType(numberIndexType);
-                // The two checks above *should* have already resolved the type (if needed), so this should be cached
                 var resolved = resolveStructuredTypeMembers(type);
                 for (var _i = 0, _a = resolved.callSignatures; _i < _a.length; _i++) {
                     var signature = _a[_i];
@@ -28916,16 +23511,12 @@ var ts;
                     return true;
                 }
                 var t = getTypeOfSymbol(symbol);
-                visitType(t); // Should handle members on classes and such
-                if (symbol.flags & 1952 /* HasExports */) {
+                visitType(t);
+                if (symbol.flags & 1955) {
                     symbol.exports.forEach(visitSymbol);
                 }
                 ts.forEach(symbol.declarations, function (d) {
-                    // Type queries are too far resolved when we just visit the symbol's type
-                    //  (their type resolved directly to the member deeply referenced)
-                    // So to get the intervening symbols, we need to check if there's a type
-                    // query node on any of the symbol's declarations and get symbols there
-                    if (d.type && d.type.kind === 165 /* TypeQuery */) {
+                    if (d.type && d.type.kind === 165) {
                         var query = d.type;
                         var entity = getResolvedSymbol(getFirstIdentifier(query.exprName));
                         visitSymbol(entity);
@@ -28937,7 +23528,6 @@ var ts;
     }
     ts.createGetSymbolWalker = createGetSymbolWalker;
 })(ts || (ts = {}));
-/* @internal */
 var ts;
 (function (ts) {
     var ambientModuleSymbolRegex = /^".+"$/;
@@ -28963,28 +23553,17 @@ var ts;
     ts.getSymbolId = getSymbolId;
     function isInstantiatedModule(node, preserveConstEnums) {
         var moduleState = ts.getModuleInstanceState(node);
-        return moduleState === 1 /* Instantiated */ ||
-            (preserveConstEnums && moduleState === 2 /* ConstEnumOnly */);
+        return moduleState === 1 ||
+            (preserveConstEnums && moduleState === 2);
     }
     ts.isInstantiatedModule = isInstantiatedModule;
     function createTypeChecker(host, produceDiagnostics) {
-        // Cancellation that controls whether or not we can cancel in the middle of type checking.
-        // In general cancelling is *not* safe for the type checker.  We might be in the middle of
-        // computing something, and we will leave our internals in an inconsistent state.  Callers
-        // who set the cancellation token should catch if a cancellation exception occurs, and
-        // should throw away and create a new TypeChecker.
-        //
-        // Currently we only support setting the cancellation token when getting diagnostics.  This
-        // is because diagnostics can be quite expensive, and we want to allow hosts to bail out if
-        // they no longer need the information (for example, if the user started editing again).
         var cancellationToken;
         var requestedExternalEmitHelpers;
         var externalHelpersModule;
-        // tslint:disable variable-name
         var Symbol = ts.objectAllocator.getSymbolConstructor();
         var Type = ts.objectAllocator.getTypeConstructor();
         var Signature = ts.objectAllocator.getSignatureConstructor();
-        // tslint:enable variable-name
         var typeCount = 0;
         var symbolCount = 0;
         var enumCount = 0;
@@ -29003,18 +23582,12 @@ var ts;
         var keyofStringsOnly = !!compilerOptions.keyofStringsOnly;
         var emitResolver = createResolver();
         var nodeBuilder = createNodeBuilder();
-        var undefinedSymbol = createSymbol(4 /* Property */, "undefined");
+        var undefinedSymbol = createSymbol(4, "undefined");
         undefinedSymbol.declarations = [];
-        var argumentsSymbol = createSymbol(4 /* Property */, "arguments");
-        var requireSymbol = createSymbol(4 /* Property */, "require");
-        var moduleSymbol = createSymbol(4 /* Property */, "module");
-        /** This will be set during calls to `getResolvedSignature` where services determines an apparent number of arguments greater than what is actually provided. */
+        var argumentsSymbol = createSymbol(4, "arguments");
+        var requireSymbol = createSymbol(4, "require");
+        var moduleSymbol = createSymbol(4, "module");
         var apparentArgumentCount;
-        // for public members that accept a Node or one of its subtypes, we must guard against
-        // synthetic nodes created during transformations by calling `getParseTreeNode`.
-        // for most of these, we perform the guard only on `checker` to avoid any possible
-        // extra cost of calling `getParseTreeNode` when calling these functions from inside the
-        // checker.
         var checker = {
             getNodeCount: function () { return ts.sum(host.getSourceFiles(), "nodeCount"); },
             getIdentifierCount: function () { return ts.sum(host.getSourceFiles(), "identifierCount"); },
@@ -29157,13 +23730,13 @@ var ts;
                 return parsed ? isImplementationOfOverload(parsed) : undefined;
             },
             getImmediateAliasedSymbol: function (symbol) {
-                ts.Debug.assert((symbol.flags & 2097152 /* Alias */) !== 0, "Should only get Alias here.");
+                ts.Debug.assert((symbol.flags & 2097152) !== 0, "Should only get Alias here.");
                 var links = getSymbolLinks(symbol);
                 if (!links.immediateTarget) {
                     var node = getDeclarationOfAliasSymbol(symbol);
                     if (!node)
                         return ts.Debug.fail();
-                    links.immediateTarget = getTargetOfAliasDeclaration(node, /*dontRecursivelyResolve*/ true);
+                    links.immediateTarget = getTargetOfAliasDeclaration(node, true);
                 }
                 return links.immediateTarget;
             },
@@ -29185,9 +23758,7 @@ var ts;
             tryGetMemberInModuleExports: function (name, symbol) { return tryGetMemberInModuleExports(ts.escapeLeadingUnderscores(name), symbol); },
             tryGetMemberInModuleExportsAndProperties: function (name, symbol) { return tryGetMemberInModuleExportsAndProperties(ts.escapeLeadingUnderscores(name), symbol); },
             tryFindAmbientModuleWithoutAugmentations: function (moduleName) {
-                // we deliberately exclude augmentations
-                // since we are only interested in declarations of the module itself
-                return tryFindAmbientModule(moduleName, /*withAugmentations*/ false);
+                return tryFindAmbientModule(moduleName, false);
             },
             getApparentType: getApparentType,
             getUnionType: getUnionType,
@@ -29215,9 +23786,9 @@ var ts;
             getSuggestionForNonexistentSymbol: function (location, name, meaning) { return getSuggestionForNonexistentSymbol(location, ts.escapeLeadingUnderscores(name), meaning); },
             getSuggestionForNonexistentModule: function (node, target) { return getSuggestionForNonexistentModule(node, target); },
             getBaseConstraintOfType: getBaseConstraintOfType,
-            getDefaultFromTypeParameter: function (type) { return type && type.flags & 65536 /* TypeParameter */ ? getDefaultFromTypeParameter(type) : undefined; },
+            getDefaultFromTypeParameter: function (type) { return type && type.flags & 65536 ? getDefaultFromTypeParameter(type) : undefined; },
             resolveName: function (name, location, meaning, excludeGlobals) {
-                return resolveName(location, ts.escapeLeadingUnderscores(name), meaning, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined, /*isUse*/ false, excludeGlobals);
+                return resolveName(location, ts.escapeLeadingUnderscores(name), meaning, undefined, undefined, false, excludeGlobals);
             },
             getJsxNamespace: function (n) { return ts.unescapeLeadingUnderscores(getJsxNamespace(n)); },
             getAccessibleSymbolChain: getAccessibleSymbolChain,
@@ -29234,15 +23805,11 @@ var ts;
             getSuggestionDiagnostics: function (file, ct) {
                 var diagnostics;
                 try {
-                    // Record the cancellation token so it can be checked later on during checkSourceElement.
-                    // Do this in a finally block so we can ensure that it gets reset back to nothing after
-                    // this call is done.
                     cancellationToken = ct;
-                    // Ensure file is type checked
                     checkSourceFile(file);
-                    ts.Debug.assert(!!(getNodeLinks(file).flags & 1 /* TypeChecked */));
+                    ts.Debug.assert(!!(getNodeLinks(file).flags & 1));
                     diagnostics = ts.addRange(diagnostics, suggestionDiagnostics.get(file.fileName));
-                    if (!file.isDeclarationFile && (!unusedIsError(0 /* Local */) || !unusedIsError(1 /* Parameter */))) {
+                    if (!file.isDeclarationFile && (!unusedIsError(0) || !unusedIsError(1))) {
                         addUnusedDiagnostics();
                     }
                     return diagnostics || ts.emptyArray;
@@ -29275,63 +23842,56 @@ var ts;
         var indexedAccessTypes = ts.createMap();
         var evolvingArrayTypes = [];
         var undefinedProperties = ts.createMap();
-        var unknownSymbol = createSymbol(4 /* Property */, "unknown");
-        var resolvingSymbol = createSymbol(0, "__resolving__" /* Resolving */);
-        var anyType = createIntrinsicType(1 /* Any */, "any");
-        var autoType = createIntrinsicType(1 /* Any */, "any");
-        var wildcardType = createIntrinsicType(1 /* Any */, "any");
-        var errorType = createIntrinsicType(1 /* Any */, "error");
-        var unknownType = createIntrinsicType(2 /* Unknown */, "unknown");
-        var undefinedType = createIntrinsicType(8192 /* Undefined */, "undefined");
-        var undefinedWideningType = strictNullChecks ? undefinedType : createIntrinsicType(8192 /* Undefined */ | 134217728 /* ContainsWideningType */, "undefined");
-        var nullType = createIntrinsicType(16384 /* Null */, "null");
-        var nullWideningType = strictNullChecks ? nullType : createIntrinsicType(16384 /* Null */ | 134217728 /* ContainsWideningType */, "null");
-        var stringType = createIntrinsicType(4 /* String */, "string");
-        var numberType = createIntrinsicType(8 /* Number */, "number");
-        var falseType = createIntrinsicType(256 /* BooleanLiteral */, "false");
-        var trueType = createIntrinsicType(256 /* BooleanLiteral */, "true");
+        var unknownSymbol = createSymbol(4, "unknown");
+        var resolvingSymbol = createSymbol(0, "__resolving__");
+        var anyType = createIntrinsicType(1, "any");
+        var autoType = createIntrinsicType(1, "any");
+        var wildcardType = createIntrinsicType(1, "any");
+        var errorType = createIntrinsicType(1, "error");
+        var unknownType = createIntrinsicType(2, "unknown");
+        var undefinedType = createIntrinsicType(8192, "undefined");
+        var undefinedWideningType = strictNullChecks ? undefinedType : createIntrinsicType(8192 | 134217728, "undefined");
+        var nullType = createIntrinsicType(16384, "null");
+        var nullWideningType = strictNullChecks ? nullType : createIntrinsicType(16384 | 134217728, "null");
+        var stringType = createIntrinsicType(4, "string");
+        var numberType = createIntrinsicType(8, "number");
+        var falseType = createIntrinsicType(256, "false");
+        var trueType = createIntrinsicType(256, "true");
         var booleanType = createBooleanType([falseType, trueType]);
-        var esSymbolType = createIntrinsicType(1024 /* ESSymbol */, "symbol");
-        var voidType = createIntrinsicType(4096 /* Void */, "void");
-        var neverType = createIntrinsicType(32768 /* Never */, "never");
-        var silentNeverType = createIntrinsicType(32768 /* Never */, "never");
-        var implicitNeverType = createIntrinsicType(32768 /* Never */, "never");
-        var nonPrimitiveType = createIntrinsicType(16777216 /* NonPrimitive */, "object");
+        var esSymbolType = createIntrinsicType(1024, "symbol");
+        var voidType = createIntrinsicType(4096, "void");
+        var neverType = createIntrinsicType(32768, "never");
+        var silentNeverType = createIntrinsicType(32768, "never");
+        var implicitNeverType = createIntrinsicType(32768, "never");
+        var nonPrimitiveType = createIntrinsicType(16777216, "object");
         var stringNumberSymbolType = getUnionType([stringType, numberType, esSymbolType]);
         var keyofConstraintType = keyofStringsOnly ? stringType : stringNumberSymbolType;
         var emptyObjectType = createAnonymousType(undefined, emptySymbols, ts.emptyArray, ts.emptyArray, undefined, undefined);
-        var emptyTypeLiteralSymbol = createSymbol(2048 /* TypeLiteral */, "__type" /* Type */);
+        var emptyTypeLiteralSymbol = createSymbol(2048, "__type");
         emptyTypeLiteralSymbol.members = ts.createSymbolTable();
         var emptyTypeLiteralType = createAnonymousType(emptyTypeLiteralSymbol, emptySymbols, ts.emptyArray, ts.emptyArray, undefined, undefined);
         var emptyGenericType = createAnonymousType(undefined, emptySymbols, ts.emptyArray, ts.emptyArray, undefined, undefined);
         emptyGenericType.instantiations = ts.createMap();
         var anyFunctionType = createAnonymousType(undefined, emptySymbols, ts.emptyArray, ts.emptyArray, undefined, undefined);
-        // The anyFunctionType contains the anyFunctionType by definition. The flag is further propagated
-        // in getPropagatingFlagsOfTypes, and it is checked in inferFromTypes.
-        anyFunctionType.flags |= 536870912 /* ContainsAnyFunctionType */;
+        anyFunctionType.flags |= 536870912;
         var noConstraintType = createAnonymousType(undefined, emptySymbols, ts.emptyArray, ts.emptyArray, undefined, undefined);
         var circularConstraintType = createAnonymousType(undefined, emptySymbols, ts.emptyArray, ts.emptyArray, undefined, undefined);
         var resolvingDefaultType = createAnonymousType(undefined, emptySymbols, ts.emptyArray, ts.emptyArray, undefined, undefined);
-        var markerSuperType = createType(65536 /* TypeParameter */);
-        var markerSubType = createType(65536 /* TypeParameter */);
+        var markerSuperType = createType(65536);
+        var markerSubType = createType(65536);
         markerSubType.constraint = markerSuperType;
-        var markerOtherType = createType(65536 /* TypeParameter */);
+        var markerOtherType = createType(65536);
         var noTypePredicate = createIdentifierTypePredicate("<<unresolved>>", 0, anyType);
-        var anySignature = createSignature(undefined, undefined, undefined, ts.emptyArray, anyType, /*resolvedTypePredicate*/ undefined, 0, /*hasRestParameter*/ false, /*hasLiteralTypes*/ false);
-        var unknownSignature = createSignature(undefined, undefined, undefined, ts.emptyArray, errorType, /*resolvedTypePredicate*/ undefined, 0, /*hasRestParameter*/ false, /*hasLiteralTypes*/ false);
-        var resolvingSignature = createSignature(undefined, undefined, undefined, ts.emptyArray, anyType, /*resolvedTypePredicate*/ undefined, 0, /*hasRestParameter*/ false, /*hasLiteralTypes*/ false);
-        var silentNeverSignature = createSignature(undefined, undefined, undefined, ts.emptyArray, silentNeverType, /*resolvedTypePredicate*/ undefined, 0, /*hasRestParameter*/ false, /*hasLiteralTypes*/ false);
+        var anySignature = createSignature(undefined, undefined, undefined, ts.emptyArray, anyType, undefined, 0, false, false);
+        var unknownSignature = createSignature(undefined, undefined, undefined, ts.emptyArray, errorType, undefined, 0, false, false);
+        var resolvingSignature = createSignature(undefined, undefined, undefined, ts.emptyArray, anyType, undefined, 0, false, false);
+        var silentNeverSignature = createSignature(undefined, undefined, undefined, ts.emptyArray, silentNeverType, undefined, 0, false, false);
         var resolvingSignaturesArray = [resolvingSignature];
-        var enumNumberIndexInfo = createIndexInfo(stringType, /*isReadonly*/ true);
-        var jsObjectLiteralIndexInfo = createIndexInfo(anyType, /*isReadonly*/ false);
+        var enumNumberIndexInfo = createIndexInfo(stringType, true);
+        var jsObjectLiteralIndexInfo = createIndexInfo(anyType, false);
         var globals = ts.createSymbolTable();
         var reverseMappedCache = ts.createMap();
         var ambientModulesCache;
-        /**
-         * List of every ambient module with a "*" wildcard.
-         * Unlike other ambient modules, these can't be stored in `globals` because symbol tables only deal with exact matches.
-         * This is only used if there is no exact match.
-         */
         var patternAmbientModules;
         var globalObjectType;
         var globalFunctionType;
@@ -29346,9 +23906,6 @@ var ts;
         var autoArrayType;
         var anyReadonlyArrayType;
         var deferredGlobalNonNullableTypeAlias;
-        // The library files are only loaded when the feature is used.
-        // This allows users to just specify library files they want to used through --lib
-        // and they will not get an error from not having unrelated library files
         var deferredGlobalESSymbolConstructorSymbol;
         var deferredGlobalESSymbolType;
         var deferredGlobalTypedPropertyDescriptorType;
@@ -29365,7 +23922,7 @@ var ts;
         var deferredGlobalImportMetaType;
         var deferredGlobalExtractSymbol;
         var deferredNodes;
-        var allPotentiallyUnusedIdentifiers = ts.createMap(); // key is file name
+        var allPotentiallyUnusedIdentifiers = ts.createMap();
         var flowLoopStart = 0;
         var flowLoopCount = 0;
         var sharedFlowCount = 0;
@@ -29390,87 +23947,24 @@ var ts;
         var potentialNewTargetCollisions = [];
         var awaitedTypeStack = [];
         var diagnostics = ts.createDiagnosticCollection();
-        // Suggestion diagnostics must have a file. Keyed by source file name.
         var suggestionDiagnostics = ts.createMultiMap();
-        var TypeFacts;
-        (function (TypeFacts) {
-            TypeFacts[TypeFacts["None"] = 0] = "None";
-            TypeFacts[TypeFacts["TypeofEQString"] = 1] = "TypeofEQString";
-            TypeFacts[TypeFacts["TypeofEQNumber"] = 2] = "TypeofEQNumber";
-            TypeFacts[TypeFacts["TypeofEQBoolean"] = 4] = "TypeofEQBoolean";
-            TypeFacts[TypeFacts["TypeofEQSymbol"] = 8] = "TypeofEQSymbol";
-            TypeFacts[TypeFacts["TypeofEQObject"] = 16] = "TypeofEQObject";
-            TypeFacts[TypeFacts["TypeofEQFunction"] = 32] = "TypeofEQFunction";
-            TypeFacts[TypeFacts["TypeofEQHostObject"] = 64] = "TypeofEQHostObject";
-            TypeFacts[TypeFacts["TypeofNEString"] = 128] = "TypeofNEString";
-            TypeFacts[TypeFacts["TypeofNENumber"] = 256] = "TypeofNENumber";
-            TypeFacts[TypeFacts["TypeofNEBoolean"] = 512] = "TypeofNEBoolean";
-            TypeFacts[TypeFacts["TypeofNESymbol"] = 1024] = "TypeofNESymbol";
-            TypeFacts[TypeFacts["TypeofNEObject"] = 2048] = "TypeofNEObject";
-            TypeFacts[TypeFacts["TypeofNEFunction"] = 4096] = "TypeofNEFunction";
-            TypeFacts[TypeFacts["TypeofNEHostObject"] = 8192] = "TypeofNEHostObject";
-            TypeFacts[TypeFacts["EQUndefined"] = 16384] = "EQUndefined";
-            TypeFacts[TypeFacts["EQNull"] = 32768] = "EQNull";
-            TypeFacts[TypeFacts["EQUndefinedOrNull"] = 65536] = "EQUndefinedOrNull";
-            TypeFacts[TypeFacts["NEUndefined"] = 131072] = "NEUndefined";
-            TypeFacts[TypeFacts["NENull"] = 262144] = "NENull";
-            TypeFacts[TypeFacts["NEUndefinedOrNull"] = 524288] = "NEUndefinedOrNull";
-            TypeFacts[TypeFacts["Truthy"] = 1048576] = "Truthy";
-            TypeFacts[TypeFacts["Falsy"] = 2097152] = "Falsy";
-            TypeFacts[TypeFacts["All"] = 4194303] = "All";
-            // The following members encode facts about particular kinds of types for use in the getTypeFacts function.
-            // The presence of a particular fact means that the given test is true for some (and possibly all) values
-            // of that kind of type.
-            TypeFacts[TypeFacts["BaseStringStrictFacts"] = 933633] = "BaseStringStrictFacts";
-            TypeFacts[TypeFacts["BaseStringFacts"] = 3145473] = "BaseStringFacts";
-            TypeFacts[TypeFacts["StringStrictFacts"] = 4079361] = "StringStrictFacts";
-            TypeFacts[TypeFacts["StringFacts"] = 4194049] = "StringFacts";
-            TypeFacts[TypeFacts["EmptyStringStrictFacts"] = 3030785] = "EmptyStringStrictFacts";
-            TypeFacts[TypeFacts["EmptyStringFacts"] = 3145473] = "EmptyStringFacts";
-            TypeFacts[TypeFacts["NonEmptyStringStrictFacts"] = 1982209] = "NonEmptyStringStrictFacts";
-            TypeFacts[TypeFacts["NonEmptyStringFacts"] = 4194049] = "NonEmptyStringFacts";
-            TypeFacts[TypeFacts["BaseNumberStrictFacts"] = 933506] = "BaseNumberStrictFacts";
-            TypeFacts[TypeFacts["BaseNumberFacts"] = 3145346] = "BaseNumberFacts";
-            TypeFacts[TypeFacts["NumberStrictFacts"] = 4079234] = "NumberStrictFacts";
-            TypeFacts[TypeFacts["NumberFacts"] = 4193922] = "NumberFacts";
-            TypeFacts[TypeFacts["ZeroStrictFacts"] = 3030658] = "ZeroStrictFacts";
-            TypeFacts[TypeFacts["ZeroFacts"] = 3145346] = "ZeroFacts";
-            TypeFacts[TypeFacts["NonZeroStrictFacts"] = 1982082] = "NonZeroStrictFacts";
-            TypeFacts[TypeFacts["NonZeroFacts"] = 4193922] = "NonZeroFacts";
-            TypeFacts[TypeFacts["BaseBooleanStrictFacts"] = 933252] = "BaseBooleanStrictFacts";
-            TypeFacts[TypeFacts["BaseBooleanFacts"] = 3145092] = "BaseBooleanFacts";
-            TypeFacts[TypeFacts["BooleanStrictFacts"] = 4078980] = "BooleanStrictFacts";
-            TypeFacts[TypeFacts["BooleanFacts"] = 4193668] = "BooleanFacts";
-            TypeFacts[TypeFacts["FalseStrictFacts"] = 3030404] = "FalseStrictFacts";
-            TypeFacts[TypeFacts["FalseFacts"] = 3145092] = "FalseFacts";
-            TypeFacts[TypeFacts["TrueStrictFacts"] = 1981828] = "TrueStrictFacts";
-            TypeFacts[TypeFacts["TrueFacts"] = 4193668] = "TrueFacts";
-            TypeFacts[TypeFacts["SymbolStrictFacts"] = 1981320] = "SymbolStrictFacts";
-            TypeFacts[TypeFacts["SymbolFacts"] = 4193160] = "SymbolFacts";
-            TypeFacts[TypeFacts["ObjectStrictFacts"] = 1972176] = "ObjectStrictFacts";
-            TypeFacts[TypeFacts["ObjectFacts"] = 4184016] = "ObjectFacts";
-            TypeFacts[TypeFacts["FunctionStrictFacts"] = 1970144] = "FunctionStrictFacts";
-            TypeFacts[TypeFacts["FunctionFacts"] = 4181984] = "FunctionFacts";
-            TypeFacts[TypeFacts["UndefinedFacts"] = 2457472] = "UndefinedFacts";
-            TypeFacts[TypeFacts["NullFacts"] = 2340752] = "NullFacts";
-        })(TypeFacts || (TypeFacts = {}));
         var typeofEQFacts = ts.createMapFromTemplate({
-            string: 1 /* TypeofEQString */,
-            number: 2 /* TypeofEQNumber */,
-            boolean: 4 /* TypeofEQBoolean */,
-            symbol: 8 /* TypeofEQSymbol */,
-            undefined: 16384 /* EQUndefined */,
-            object: 16 /* TypeofEQObject */,
-            function: 32 /* TypeofEQFunction */
+            string: 1,
+            number: 2,
+            boolean: 4,
+            symbol: 8,
+            undefined: 16384,
+            object: 16,
+            function: 32
         });
         var typeofNEFacts = ts.createMapFromTemplate({
-            string: 128 /* TypeofNEString */,
-            number: 256 /* TypeofNENumber */,
-            boolean: 512 /* TypeofNEBoolean */,
-            symbol: 1024 /* TypeofNESymbol */,
-            undefined: 131072 /* NEUndefined */,
-            object: 2048 /* TypeofNEObject */,
-            function: 4096 /* TypeofNEFunction */
+            string: 128,
+            number: 256,
+            boolean: 512,
+            symbol: 1024,
+            undefined: 131072,
+            object: 2048,
+            function: 4096
         });
         var typeofTypesByName = ts.createMapFromTemplate({
             string: stringType,
@@ -29488,105 +23982,57 @@ var ts;
         var comparableRelation = ts.createMap();
         var identityRelation = ts.createMap();
         var enumRelation = ts.createMap();
-        var TypeSystemPropertyName;
-        (function (TypeSystemPropertyName) {
-            TypeSystemPropertyName[TypeSystemPropertyName["Type"] = 0] = "Type";
-            TypeSystemPropertyName[TypeSystemPropertyName["ResolvedBaseConstructorType"] = 1] = "ResolvedBaseConstructorType";
-            TypeSystemPropertyName[TypeSystemPropertyName["DeclaredType"] = 2] = "DeclaredType";
-            TypeSystemPropertyName[TypeSystemPropertyName["ResolvedReturnType"] = 3] = "ResolvedReturnType";
-            TypeSystemPropertyName[TypeSystemPropertyName["ResolvedBaseConstraint"] = 4] = "ResolvedBaseConstraint";
-        })(TypeSystemPropertyName || (TypeSystemPropertyName = {}));
-        var CheckMode;
-        (function (CheckMode) {
-            CheckMode[CheckMode["Normal"] = 0] = "Normal";
-            CheckMode[CheckMode["SkipContextSensitive"] = 1] = "SkipContextSensitive";
-            CheckMode[CheckMode["Inferential"] = 2] = "Inferential";
-            CheckMode[CheckMode["Contextual"] = 3] = "Contextual";
-        })(CheckMode || (CheckMode = {}));
-        var CallbackCheck;
-        (function (CallbackCheck) {
-            CallbackCheck[CallbackCheck["None"] = 0] = "None";
-            CallbackCheck[CallbackCheck["Bivariant"] = 1] = "Bivariant";
-            CallbackCheck[CallbackCheck["Strict"] = 2] = "Strict";
-        })(CallbackCheck || (CallbackCheck = {}));
-        var MappedTypeModifiers;
-        (function (MappedTypeModifiers) {
-            MappedTypeModifiers[MappedTypeModifiers["IncludeReadonly"] = 1] = "IncludeReadonly";
-            MappedTypeModifiers[MappedTypeModifiers["ExcludeReadonly"] = 2] = "ExcludeReadonly";
-            MappedTypeModifiers[MappedTypeModifiers["IncludeOptional"] = 4] = "IncludeOptional";
-            MappedTypeModifiers[MappedTypeModifiers["ExcludeOptional"] = 8] = "ExcludeOptional";
-        })(MappedTypeModifiers || (MappedTypeModifiers = {}));
-        var ExpandingFlags;
-        (function (ExpandingFlags) {
-            ExpandingFlags[ExpandingFlags["None"] = 0] = "None";
-            ExpandingFlags[ExpandingFlags["Source"] = 1] = "Source";
-            ExpandingFlags[ExpandingFlags["Target"] = 2] = "Target";
-            ExpandingFlags[ExpandingFlags["Both"] = 3] = "Both";
-        })(ExpandingFlags || (ExpandingFlags = {}));
-        var MembersOrExportsResolutionKind;
-        (function (MembersOrExportsResolutionKind) {
-            MembersOrExportsResolutionKind["resolvedExports"] = "resolvedExports";
-            MembersOrExportsResolutionKind["resolvedMembers"] = "resolvedMembers";
-        })(MembersOrExportsResolutionKind || (MembersOrExportsResolutionKind = {}));
-        var UnusedKind;
-        (function (UnusedKind) {
-            UnusedKind[UnusedKind["Local"] = 0] = "Local";
-            UnusedKind[UnusedKind["Parameter"] = 1] = "Parameter";
-        })(UnusedKind || (UnusedKind = {}));
         var builtinGlobals = ts.createSymbolTable();
         builtinGlobals.set(undefinedSymbol.escapedName, undefinedSymbol);
         var isNotOverloadAndNotAccessor = ts.and(isNotOverload, isNotAccessor);
         initializeTypeChecker();
         return checker;
-        /**
-         * @deprecated
-         */
         function getSymbolDisplayBuilder() {
             return {
                 buildTypeDisplay: function (type, writer, enclosingDeclaration, flags) {
                     typeToString(type, enclosingDeclaration, flags, emitTextWriterWrapper(writer));
                 },
                 buildSymbolDisplay: function (symbol, writer, enclosingDeclaration, meaning, flags) {
-                    if (flags === void 0) { flags = 0 /* None */; }
-                    symbolToString(symbol, enclosingDeclaration, meaning, flags | 4 /* AllowAnyNodeKind */, emitTextWriterWrapper(writer));
+                    if (flags === void 0) { flags = 0; }
+                    symbolToString(symbol, enclosingDeclaration, meaning, flags | 4, emitTextWriterWrapper(writer));
                 },
                 buildSignatureDisplay: function (signature, writer, enclosing, flags, kind) {
                     signatureToString(signature, enclosing, flags, kind, emitTextWriterWrapper(writer));
                 },
                 buildIndexSignatureDisplay: function (info, writer, kind, enclosing, flags) {
-                    var sig = nodeBuilder.indexInfoToIndexSignatureDeclaration(info, kind, enclosing, toNodeBuilderFlags(flags) | 3112960 /* IgnoreErrors */, writer);
+                    var sig = nodeBuilder.indexInfoToIndexSignatureDeclaration(info, kind, enclosing, toNodeBuilderFlags(flags) | 3112960, writer);
                     var printer = ts.createPrinter({ removeComments: true });
-                    printer.writeNode(4 /* Unspecified */, sig, ts.getSourceFileOfNode(ts.getParseTreeNode(enclosing)), emitTextWriterWrapper(writer));
+                    printer.writeNode(4, sig, ts.getSourceFileOfNode(ts.getParseTreeNode(enclosing)), emitTextWriterWrapper(writer));
                 },
                 buildParameterDisplay: function (symbol, writer, enclosing, flags) {
-                    var node = nodeBuilder.symbolToParameterDeclaration(symbol, enclosing, toNodeBuilderFlags(flags) | 3112960 /* IgnoreErrors */, writer);
+                    var node = nodeBuilder.symbolToParameterDeclaration(symbol, enclosing, toNodeBuilderFlags(flags) | 3112960, writer);
                     var printer = ts.createPrinter({ removeComments: true });
-                    printer.writeNode(4 /* Unspecified */, node, ts.getSourceFileOfNode(ts.getParseTreeNode(enclosing)), emitTextWriterWrapper(writer)); // TODO: GH#18217
+                    printer.writeNode(4, node, ts.getSourceFileOfNode(ts.getParseTreeNode(enclosing)), emitTextWriterWrapper(writer));
                 },
                 buildTypeParameterDisplay: function (tp, writer, enclosing, flags) {
-                    var node = nodeBuilder.typeParameterToDeclaration(tp, enclosing, toNodeBuilderFlags(flags) | 3112960 /* IgnoreErrors */ | 8192 /* OmitParameterModifiers */, writer);
+                    var node = nodeBuilder.typeParameterToDeclaration(tp, enclosing, toNodeBuilderFlags(flags) | 3112960 | 8192, writer);
                     var printer = ts.createPrinter({ removeComments: true });
-                    printer.writeNode(4 /* Unspecified */, node, ts.getSourceFileOfNode(ts.getParseTreeNode(enclosing)), emitTextWriterWrapper(writer)); // TODO: GH#18217
+                    printer.writeNode(4, node, ts.getSourceFileOfNode(ts.getParseTreeNode(enclosing)), emitTextWriterWrapper(writer));
                 },
                 buildTypePredicateDisplay: function (predicate, writer, enclosing, flags) {
                     typePredicateToString(predicate, enclosing, flags, emitTextWriterWrapper(writer));
                 },
                 buildTypeParameterDisplayFromSymbol: function (symbol, writer, enclosing, flags) {
-                    var nodes = nodeBuilder.symbolToTypeParameterDeclarations(symbol, enclosing, toNodeBuilderFlags(flags) | 3112960 /* IgnoreErrors */, writer);
+                    var nodes = nodeBuilder.symbolToTypeParameterDeclarations(symbol, enclosing, toNodeBuilderFlags(flags) | 3112960, writer);
                     var printer = ts.createPrinter({ removeComments: true });
-                    printer.writeList(26896 /* TypeParameters */, nodes, ts.getSourceFileOfNode(ts.getParseTreeNode(enclosing)), emitTextWriterWrapper(writer));
+                    printer.writeList(26896, nodes, ts.getSourceFileOfNode(ts.getParseTreeNode(enclosing)), emitTextWriterWrapper(writer));
                 },
                 buildDisplayForParametersAndDelimiters: function (thisParameter, parameters, writer, enclosing, originalFlags) {
                     var printer = ts.createPrinter({ removeComments: true });
-                    var flags = 8192 /* OmitParameterModifiers */ | 3112960 /* IgnoreErrors */ | toNodeBuilderFlags(originalFlags);
-                    var thisParameterArray = thisParameter ? [nodeBuilder.symbolToParameterDeclaration(thisParameter, enclosing, flags)] : []; // TODO: GH#18217
-                    var params = ts.createNodeArray(thisParameterArray.concat(ts.map(parameters, function (param) { return nodeBuilder.symbolToParameterDeclaration(param, enclosing, flags); }))); // TODO: GH#18217
-                    printer.writeList(1296 /* CallExpressionArguments */, params, ts.getSourceFileOfNode(ts.getParseTreeNode(enclosing)), emitTextWriterWrapper(writer));
+                    var flags = 8192 | 3112960 | toNodeBuilderFlags(originalFlags);
+                    var thisParameterArray = thisParameter ? [nodeBuilder.symbolToParameterDeclaration(thisParameter, enclosing, flags)] : [];
+                    var params = ts.createNodeArray(thisParameterArray.concat(ts.map(parameters, function (param) { return nodeBuilder.symbolToParameterDeclaration(param, enclosing, flags); })));
+                    printer.writeList(1296, params, ts.getSourceFileOfNode(ts.getParseTreeNode(enclosing)), emitTextWriterWrapper(writer));
                 },
                 buildDisplayForTypeParametersAndDelimiters: function (typeParameters, writer, enclosing, flags) {
                     var printer = ts.createPrinter({ removeComments: true });
-                    var args = ts.createNodeArray(ts.map(typeParameters, function (p) { return nodeBuilder.typeParameterToDeclaration(p, enclosing, toNodeBuilderFlags(flags)); })); // TODO: GH#18217
-                    printer.writeList(26896 /* TypeParameters */, args, ts.getSourceFileOfNode(ts.getParseTreeNode(enclosing)), emitTextWriterWrapper(writer));
+                    var args = ts.createNodeArray(ts.map(typeParameters, function (p) { return nodeBuilder.typeParameterToDeclaration(p, enclosing, toNodeBuilderFlags(flags)); }));
+                    printer.writeList(26896, args, ts.getSourceFileOfNode(ts.getParseTreeNode(enclosing)), emitTextWriterWrapper(writer));
                 },
                 buildReturnTypeDisplay: function (signature, writer, enclosing, flags) {
                     writer.writePunctuation(":");
@@ -29595,9 +24041,9 @@ var ts;
                     if (predicate) {
                         return typePredicateToString(predicate, enclosing, flags, emitTextWriterWrapper(writer));
                     }
-                    var node = nodeBuilder.typeToTypeNode(getReturnTypeOfSignature(signature), enclosing, toNodeBuilderFlags(flags) | 3112960 /* IgnoreErrors */, writer);
+                    var node = nodeBuilder.typeToTypeNode(getReturnTypeOfSignature(signature), enclosing, toNodeBuilderFlags(flags) | 3112960, writer);
                     var printer = ts.createPrinter({ removeComments: true });
-                    printer.writeNode(4 /* Unspecified */, node, ts.getSourceFileOfNode(ts.getParseTreeNode(enclosing)), emitTextWriterWrapper(writer)); // TODO: GH#18217
+                    printer.writeNode(4, node, ts.getSourceFileOfNode(ts.getParseTreeNode(enclosing)), emitTextWriterWrapper(writer));
                 }
             };
             function emitTextWriterWrapper(underlying) {
@@ -29684,7 +24130,7 @@ var ts;
                     }
                     var jsxPragma = file.pragmas.get("jsx");
                     if (jsxPragma) {
-                        var chosenpragma = ts.isArray(jsxPragma) ? jsxPragma[0] : jsxPragma; // TODO: GH#18217
+                        var chosenpragma = ts.isArray(jsxPragma) ? jsxPragma[0] : jsxPragma;
                         file.localJsxFactory = ts.parseIsolatedEntityName(chosenpragma.arguments.factory, languageVersion);
                         if (file.localJsxFactory) {
                             return file.localJsxNamespace = getFirstIdentifier(file.localJsxFactory).escapedText;
@@ -29707,8 +24153,6 @@ var ts;
             return _jsxNamespace;
         }
         function getEmitResolver(sourceFile, cancellationToken) {
-            // Ensure we have all the type information in place for this file so that all the
-            // emitter questions of this resolver will return the right information.
             getDiagnostics(sourceFile, cancellationToken);
             return emitResolver;
         }
@@ -29731,47 +24175,47 @@ var ts;
         }
         function createSymbol(flags, name, checkFlags) {
             symbolCount++;
-            var symbol = (new Symbol(flags | 33554432 /* Transient */, name));
+            var symbol = (new Symbol(flags | 33554432, name));
             symbol.checkFlags = checkFlags || 0;
             return symbol;
         }
         function isTransientSymbol(symbol) {
-            return (symbol.flags & 33554432 /* Transient */) !== 0;
+            return (symbol.flags & 33554432) !== 0;
         }
         function getExcludedSymbolFlags(flags) {
             var result = 0;
-            if (flags & 2 /* BlockScopedVariable */)
-                result |= 67216319 /* BlockScopedVariableExcludes */;
-            if (flags & 1 /* FunctionScopedVariable */)
-                result |= 67216318 /* FunctionScopedVariableExcludes */;
-            if (flags & 4 /* Property */)
-                result |= 0 /* PropertyExcludes */;
-            if (flags & 8 /* EnumMember */)
-                result |= 68008959 /* EnumMemberExcludes */;
-            if (flags & 16 /* Function */)
-                result |= 67215791 /* FunctionExcludes */;
-            if (flags & 32 /* Class */)
-                result |= 68008383 /* ClassExcludes */;
-            if (flags & 64 /* Interface */)
-                result |= 67901832 /* InterfaceExcludes */;
-            if (flags & 256 /* RegularEnum */)
-                result |= 68008191 /* RegularEnumExcludes */;
-            if (flags & 128 /* ConstEnum */)
-                result |= 68008831 /* ConstEnumExcludes */;
-            if (flags & 512 /* ValueModule */)
-                result |= 67215503 /* ValueModuleExcludes */;
-            if (flags & 8192 /* Method */)
-                result |= 67208127 /* MethodExcludes */;
-            if (flags & 32768 /* GetAccessor */)
-                result |= 67150783 /* GetAccessorExcludes */;
-            if (flags & 65536 /* SetAccessor */)
-                result |= 67183551 /* SetAccessorExcludes */;
-            if (flags & 262144 /* TypeParameter */)
-                result |= 67639784 /* TypeParameterExcludes */;
-            if (flags & 524288 /* TypeAlias */)
-                result |= 67901928 /* TypeAliasExcludes */;
-            if (flags & 2097152 /* Alias */)
-                result |= 2097152 /* AliasExcludes */;
+            if (flags & 2)
+                result |= 67216319;
+            if (flags & 1)
+                result |= 67216318;
+            if (flags & 4)
+                result |= 0;
+            if (flags & 8)
+                result |= 68008959;
+            if (flags & 16)
+                result |= 67215791;
+            if (flags & 32)
+                result |= 68008383;
+            if (flags & 64)
+                result |= 67901832;
+            if (flags & 256)
+                result |= 68008191;
+            if (flags & 128)
+                result |= 68008831;
+            if (flags & 512)
+                result |= 67215503;
+            if (flags & 8192)
+                result |= 67208127;
+            if (flags & 32768)
+                result |= 67150783;
+            if (flags & 65536)
+                result |= 67183551;
+            if (flags & 262144)
+                result |= 67639784;
+            if (flags & 524288)
+                result |= 67901928;
+            if (flags & 2097152)
+                result |= 2097152;
             return result;
         }
         function recordMergedSymbol(target, source) {
@@ -29796,27 +24240,20 @@ var ts;
             recordMergedSymbol(result, symbol);
             return result;
         }
-        /**
-         * Note: if target is transient, then it is mutable, and mergeSymbol with both mutate and return it.
-         * If target is not transient, mergeSymbol will produce a transient clone, mutate that and return it.
-         */
         function mergeSymbol(target, source) {
             if (!(target.flags & getExcludedSymbolFlags(source.flags)) ||
-                (source.flags | target.flags) & 67108864 /* JSContainer */) {
+                (source.flags | target.flags) & 67108864) {
                 ts.Debug.assert(source !== target);
-                if (!(target.flags & 33554432 /* Transient */)) {
+                if (!(target.flags & 33554432)) {
                     target = cloneSymbol(target);
                 }
-                // Javascript static-property-assignment declarations always merge, even though they are also values
-                if (source.flags & 512 /* ValueModule */ && target.flags & 512 /* ValueModule */ && target.constEnumOnlyModule && !source.constEnumOnlyModule) {
-                    // reset flag when merging instantiated module into value module that has only const enums
+                if (source.flags & 512 && target.flags & 512 && target.constEnumOnlyModule && !source.constEnumOnlyModule) {
                     target.constEnumOnlyModule = false;
                 }
                 target.flags |= source.flags;
                 if (source.valueDeclaration &&
                     (!target.valueDeclaration ||
                         ts.isEffectiveModuleDeclaration(target.valueDeclaration) && !ts.isEffectiveModuleDeclaration(source.valueDeclaration))) {
-                    // other kinds of value declarations take precedence over modules
                     target.valueDeclaration = source.valueDeclaration;
                 }
                 ts.addRange(target.declarations, source.declarations);
@@ -29832,21 +24269,21 @@ var ts;
                 }
                 recordMergedSymbol(target, source);
             }
-            else if (target.flags & 1024 /* NamespaceModule */) {
+            else if (target.flags & 1024) {
                 error(ts.getNameOfDeclaration(source.declarations[0]), ts.Diagnostics.Cannot_augment_module_0_with_value_exports_because_it_resolves_to_a_non_module_entity, symbolToString(target));
             }
             else {
-                var message_2 = target.flags & 384 /* Enum */ || source.flags & 384 /* Enum */
+                var message_2 = target.flags & 384 || source.flags & 384
                     ? ts.Diagnostics.Enum_declarations_can_only_merge_with_namespace_or_other_enum_declarations
-                    : target.flags & 2 /* BlockScopedVariable */ || source.flags & 2 /* BlockScopedVariable */
+                    : target.flags & 2 || source.flags & 2
                         ? ts.Diagnostics.Cannot_redeclare_block_scoped_variable_0
                         : ts.Diagnostics.Duplicate_identifier_0;
                 ts.forEach(source.declarations, function (node) {
-                    var errorNode = (ts.getJavascriptInitializer(node, /*isPrototypeAssignment*/ false) ? ts.getOuterNameOfJsInitializer(node) : ts.getNameOfDeclaration(node)) || node;
+                    var errorNode = (ts.getJavascriptInitializer(node, false) ? ts.getOuterNameOfJsInitializer(node) : ts.getNameOfDeclaration(node)) || node;
                     error(errorNode, message_2, symbolToString(source));
                 });
                 ts.forEach(target.declarations, function (node) {
-                    var errorNode = (ts.getJavascriptInitializer(node, /*isPrototypeAssignment*/ false) ? ts.getOuterNameOfJsInitializer(node) : ts.getNameOfDeclaration(node)) || node;
+                    var errorNode = (ts.getJavascriptInitializer(node, false) ? ts.getOuterNameOfJsInitializer(node) : ts.getNameOfDeclaration(node)) || node;
                     error(errorNode, message_2, symbolToString(source));
                 });
             }
@@ -29870,9 +24307,6 @@ var ts;
         function mergeModuleAugmentation(moduleName) {
             var moduleAugmentation = moduleName.parent;
             if (moduleAugmentation.symbol.declarations[0] !== moduleAugmentation) {
-                // this is a combined symbol for multiple augmentations within the same file.
-                // its symbol already has accumulated information for all declarations
-                // so we need to add it just once - do the work only for first declaration
                 ts.Debug.assert(moduleAugmentation.symbol.declarations.length > 1);
                 return;
             }
@@ -29880,22 +24314,18 @@ var ts;
                 mergeSymbolTable(globals, moduleAugmentation.symbol.exports);
             }
             else {
-                // find a module that about to be augmented
-                // do not validate names of augmentations that are defined in ambient context
-                var moduleNotFoundError = !(moduleName.parent.parent.flags & 4194304 /* Ambient */)
+                var moduleNotFoundError = !(moduleName.parent.parent.flags & 4194304)
                     ? ts.Diagnostics.Invalid_module_name_in_augmentation_module_0_cannot_be_found
                     : undefined;
-                var mainModule = resolveExternalModuleNameWorker(moduleName, moduleName, moduleNotFoundError, /*isForAugmentation*/ true);
+                var mainModule = resolveExternalModuleNameWorker(moduleName, moduleName, moduleNotFoundError, true);
                 if (!mainModule) {
                     return;
                 }
-                // obtain item referenced by 'export='
                 mainModule = resolveExternalModuleSymbol(mainModule);
-                if (mainModule.flags & 1920 /* Namespace */) {
+                if (mainModule.flags & 1920) {
                     mainModule = mergeSymbol(mainModule, moduleAugmentation.symbol);
                 }
                 else {
-                    // moduleName will be a StringLiteral since this is not `declare global`.
                     error(moduleName, ts.Diagnostics.Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity, moduleName.text);
                 }
             }
@@ -29904,7 +24334,6 @@ var ts;
             source.forEach(function (sourceSymbol, id) {
                 var targetSymbol = target.get(id);
                 if (targetSymbol) {
-                    // Error on redeclarations
                     ts.forEach(targetSymbol.declarations, addDeclarationDiagnostic(ts.unescapeLeadingUnderscores(id), message));
                 }
                 else {
@@ -29916,7 +24345,7 @@ var ts;
             }
         }
         function getSymbolLinks(symbol) {
-            if (symbol.flags & 33554432 /* Transient */)
+            if (symbol.flags & 33554432)
                 return symbol;
             var id = getSymbolId(symbol);
             return symbolLinks[id] || (symbolLinks[id] = {});
@@ -29926,38 +24355,30 @@ var ts;
             return nodeLinks[nodeId] || (nodeLinks[nodeId] = { flags: 0 });
         }
         function isGlobalSourceFile(node) {
-            return node.kind === 274 /* SourceFile */ && !ts.isExternalOrCommonJsModule(node);
+            return node.kind === 274 && !ts.isExternalOrCommonJsModule(node);
         }
         function getSymbol(symbols, name, meaning) {
             if (meaning) {
                 var symbol = symbols.get(name);
                 if (symbol) {
-                    ts.Debug.assert((ts.getCheckFlags(symbol) & 1 /* Instantiated */) === 0, "Should never get an instantiated symbol here.");
+                    ts.Debug.assert((ts.getCheckFlags(symbol) & 1) === 0, "Should never get an instantiated symbol here.");
                     if (symbol.flags & meaning) {
                         return symbol;
                     }
-                    if (symbol.flags & 2097152 /* Alias */) {
+                    if (symbol.flags & 2097152) {
                         var target = resolveAlias(symbol);
-                        // Unknown symbol means an error occurred in alias resolution, treat it as positive answer to avoid cascading errors
                         if (target === unknownSymbol || target.flags & meaning) {
                             return symbol;
                         }
                     }
                 }
             }
-            // return undefined if we can't find a symbol.
         }
-        /**
-         * Get symbols that represent parameter-property-declaration as parameter and as property declaration
-         * @param parameter a parameterDeclaration node
-         * @param parameterName a name of the parameter to get the symbols for.
-         * @return a tuple of two symbols
-         */
         function getSymbolsOfParameterPropertyDeclaration(parameter, parameterName) {
             var constructorDeclaration = parameter.parent;
             var classDeclaration = parameter.parent.parent;
-            var parameterSymbol = getSymbol(constructorDeclaration.locals, parameterName, 67216319 /* Value */);
-            var propertySymbol = getSymbol(getMembersOfSymbol(classDeclaration.symbol), parameterName, 67216319 /* Value */);
+            var parameterSymbol = getSymbol(constructorDeclaration.locals, parameterName, 67216319);
+            var propertySymbol = getSymbol(getMembersOfSymbol(classDeclaration.symbol), parameterName, 67216319);
             if (parameterSymbol && propertySymbol) {
                 return [parameterSymbol, propertySymbol];
             }
@@ -29970,12 +24391,9 @@ var ts;
                 if ((moduleKind && (declarationFile.externalModuleIndicator || useFile.externalModuleIndicator)) ||
                     (!compilerOptions.outFile && !compilerOptions.out) ||
                     isInTypeQuery(usage) ||
-                    declaration.flags & 4194304 /* Ambient */) {
-                    // nodes are in different files and order cannot be determined
+                    declaration.flags & 4194304) {
                     return true;
                 }
-                // declaration is after usage
-                // can be legal if usage is deferred (i.e. inside function or in initializer of instance property)
                 if (isUsedInFunctionOrInstanceProperty(usage, declaration)) {
                     return true;
                 }
@@ -29983,41 +24401,26 @@ var ts;
                 return sourceFiles.indexOf(declarationFile) <= sourceFiles.indexOf(useFile);
             }
             if (declaration.pos <= usage.pos) {
-                // declaration is before usage
-                if (declaration.kind === 182 /* BindingElement */) {
-                    // still might be illegal if declaration and usage are both binding elements (eg var [a = b, b = b] = [1, 2])
-                    var errorBindingElement = ts.getAncestor(usage, 182 /* BindingElement */);
+                if (declaration.kind === 182) {
+                    var errorBindingElement = ts.getAncestor(usage, 182);
                     if (errorBindingElement) {
                         return ts.findAncestor(errorBindingElement, ts.isBindingElement) !== ts.findAncestor(declaration, ts.isBindingElement) ||
                             declaration.pos < errorBindingElement.pos;
                     }
-                    // or it might be illegal if usage happens before parent variable is declared (eg var [a] = a)
-                    return isBlockScopedNameDeclaredBeforeUse(ts.getAncestor(declaration, 232 /* VariableDeclaration */), usage);
+                    return isBlockScopedNameDeclaredBeforeUse(ts.getAncestor(declaration, 232), usage);
                 }
-                else if (declaration.kind === 232 /* VariableDeclaration */) {
-                    // still might be illegal if usage is in the initializer of the variable declaration (eg var a = a)
+                else if (declaration.kind === 232) {
                     return !isImmediatelyUsedInInitializerOfBlockScopedVariable(declaration, usage);
                 }
                 else if (ts.isClassDeclaration(declaration)) {
-                    // still might be illegal if the usage is within a computed property name in the class (eg class A { static p = "a"; [A.p]() {} })
                     return !ts.findAncestor(usage, function (n) { return ts.isComputedPropertyName(n) && n.parent.parent === declaration; });
                 }
                 return true;
             }
-            // declaration is after usage, but it can still be legal if usage is deferred:
-            // 1. inside an export specifier
-            // 2. inside a function
-            // 3. inside an instance property initializer, a reference to a non-instance property
-            // 4. inside a static property initializer, a reference to a static method in the same class
-            // 5. inside a TS export= declaration (since we will move the export statement during emit to avoid TDZ)
-            // or if usage is in a type context:
-            // 1. inside a type query (typeof in type position)
-            if (usage.parent.kind === 252 /* ExportSpecifier */ || (usage.parent.kind === 249 /* ExportAssignment */ && usage.parent.isExportEquals)) {
-                // export specifiers do not use the variable, they only make it available for use
+            if (usage.parent.kind === 252 || (usage.parent.kind === 249 && usage.parent.isExportEquals)) {
                 return true;
             }
-            // When resolving symbols for exports, the `usage` location passed in can be the export site directly
-            if (usage.kind === 249 /* ExportAssignment */ && usage.isExportEquals) {
+            if (usage.kind === 249 && usage.isExportEquals) {
                 return true;
             }
             var container = ts.getEnclosingBlockScopeContainer(declaration);
@@ -30025,17 +24428,14 @@ var ts;
             function isImmediatelyUsedInInitializerOfBlockScopedVariable(declaration, usage) {
                 var container = ts.getEnclosingBlockScopeContainer(declaration);
                 switch (declaration.parent.parent.kind) {
-                    case 214 /* VariableStatement */:
-                    case 220 /* ForStatement */:
-                    case 222 /* ForOfStatement */:
-                        // variable statement/for/for-of statement case,
-                        // use site should not be inside variable declaration (initializer of declaration or binding element)
+                    case 214:
+                    case 220:
+                    case 222:
                         if (isSameScopeDescendentOf(usage, declaration, container)) {
                             return true;
                         }
                         break;
                 }
-                // ForIn/ForOf case - use site should not be used in expression part
                 var grandparent = declaration.parent.parent;
                 return ts.isForInOrOfStatement(grandparent) && isSameScopeDescendentOf(usage, grandparent.expression, container);
             }
@@ -30048,16 +24448,16 @@ var ts;
                         return true;
                     }
                     var initializerOfProperty = current.parent &&
-                        current.parent.kind === 152 /* PropertyDeclaration */ &&
+                        current.parent.kind === 152 &&
                         current.parent.initializer === current;
                     if (initializerOfProperty) {
-                        if (ts.hasModifier(current.parent, 32 /* Static */)) {
-                            if (declaration.kind === 154 /* MethodDeclaration */) {
+                        if (ts.hasModifier(current.parent, 32)) {
+                            if (declaration.kind === 154) {
                                 return true;
                             }
                         }
                         else {
-                            var isDeclarationInstanceProperty = declaration.kind === 152 /* PropertyDeclaration */ && !ts.hasModifier(declaration, 32 /* Static */);
+                            var isDeclarationInstanceProperty = declaration.kind === 152 && !ts.hasModifier(declaration, 32);
                             if (!isDeclarationInstanceProperty || ts.getContainingClass(usage) !== ts.getContainingClass(declaration)) {
                                 return true;
                             }
@@ -30067,19 +24467,12 @@ var ts;
                 });
             }
         }
-        /**
-         * Resolve a given name for a given meaning at a given location. An error is reported if the name was not found and
-         * the nameNotFoundMessage argument is not undefined. Returns the resolved symbol, or undefined if no symbol with
-         * the given name can be found.
-         *
-         * @param isUse If true, this will count towards --noUnusedLocals / --noUnusedParameters.
-         */
         function resolveName(location, name, meaning, nameNotFoundMessage, nameArg, isUse, excludeGlobals, suggestedNameNotFoundMessage) {
             if (excludeGlobals === void 0) { excludeGlobals = false; }
             return resolveNameHelper(location, name, meaning, nameNotFoundMessage, nameArg, isUse, excludeGlobals, getSymbol, suggestedNameNotFoundMessage);
         }
         function resolveNameHelper(location, name, meaning, nameNotFoundMessage, nameArg, isUse, excludeGlobals, lookup, suggestedNameNotFoundMessage) {
-            var originalLocation = location; // needed for did-you-mean error reporting, which gathers candidates starting from the original location
+            var originalLocation = location;
             var result;
             var lastLocation;
             var lastSelfReferenceLocation;
@@ -30088,40 +24481,25 @@ var ts;
             var grandparent;
             var isInExternalModule = false;
             loop: while (location) {
-                // Locals of a source file are not in scope (because they get merged into the global symbol table)
                 if (location.locals && !isGlobalSourceFile(location)) {
                     if (result = lookup(location.locals, name, meaning)) {
                         var useResult = true;
                         if (ts.isFunctionLike(location) && lastLocation && lastLocation !== location.body) {
-                            // symbol lookup restrictions for function-like declarations
-                            // - Type parameters of a function are in scope in the entire function declaration, including the parameter
-                            //   list and return type. However, local types are only in scope in the function body.
-                            // - parameters are only in the scope of function body
-                            // This restriction does not apply to JSDoc comment types because they are parented
-                            // at a higher level than type parameters would normally be
-                            if (meaning & result.flags & 67901928 /* Type */ && lastLocation.kind !== 286 /* JSDocComment */) {
-                                useResult = result.flags & 262144 /* TypeParameter */
-                                    // type parameters are visible in parameter list, return type and type parameter list
+                            if (meaning & result.flags & 67901928 && lastLocation.kind !== 286) {
+                                useResult = result.flags & 262144
                                     ? lastLocation === location.type ||
-                                        lastLocation.kind === 149 /* Parameter */ ||
-                                        lastLocation.kind === 148 /* TypeParameter */
-                                    // local types not visible outside the function body
+                                        lastLocation.kind === 149 ||
+                                        lastLocation.kind === 148
                                     : false;
                             }
-                            if (meaning & 67216319 /* Value */ && result.flags & 1 /* FunctionScopedVariable */) {
-                                // parameters are visible only inside function body, parameter list and return type
-                                // technically for parameter list case here we might mix parameters and variables declared in function,
-                                // however it is detected separately when checking initializers of parameters
-                                // to make sure that they reference no variables declared after them.
+                            if (meaning & 67216319 && result.flags & 1) {
                                 useResult =
-                                    lastLocation.kind === 149 /* Parameter */ ||
+                                    lastLocation.kind === 149 ||
                                         (lastLocation === location.type &&
                                             !!ts.findAncestor(result.valueDeclaration, ts.isParameter));
                             }
                         }
-                        else if (location.kind === 171 /* ConditionalType */) {
-                            // A type parameter declared using 'infer T' in a conditional type is visible only in
-                            // the true branch of the conditional type.
+                        else if (location.kind === 171) {
                             useResult = lastLocation === location.trueType;
                         }
                         if (useResult) {
@@ -30133,43 +24511,28 @@ var ts;
                     }
                 }
                 switch (location.kind) {
-                    case 274 /* SourceFile */:
+                    case 274:
                         if (!ts.isExternalOrCommonJsModule(location))
                             break;
                         isInExternalModule = true;
-                    // falls through
-                    case 239 /* ModuleDeclaration */:
+                    case 239:
                         var moduleExports = getSymbolOfNode(location).exports;
-                        if (location.kind === 274 /* SourceFile */ || ts.isAmbientModule(location)) {
-                            // It's an external module. First see if the module has an export default and if the local
-                            // name of that export default matches.
-                            if (result = moduleExports.get("default" /* Default */)) {
+                        if (location.kind === 274 || ts.isAmbientModule(location)) {
+                            if (result = moduleExports.get("default")) {
                                 var localSymbol = ts.getLocalSymbolForExportDefault(result);
                                 if (localSymbol && (result.flags & meaning) && localSymbol.escapedName === name) {
                                     break loop;
                                 }
                                 result = undefined;
                             }
-                            // Because of module/namespace merging, a module's exports are in scope,
-                            // yet we never want to treat an export specifier as putting a member in scope.
-                            // Therefore, if the name we find is purely an export specifier, it is not actually considered in scope.
-                            // Two things to note about this:
-                            //     1. We have to check this without calling getSymbol. The problem with calling getSymbol
-                            //        on an export specifier is that it might find the export specifier itself, and try to
-                            //        resolve it as an alias. This will cause the checker to consider the export specifier
-                            //        a circular alias reference when it might not be.
-                            //     2. We check === SymbolFlags.Alias in order to check that the symbol is *purely*
-                            //        an alias. If we used &, we'd be throwing out symbols that have non alias aspects,
-                            //        which is not the desired behavior.
                             var moduleExport = moduleExports.get(name);
                             if (moduleExport &&
-                                moduleExport.flags === 2097152 /* Alias */ &&
-                                ts.getDeclarationOfKind(moduleExport, 252 /* ExportSpecifier */)) {
+                                moduleExport.flags === 2097152 &&
+                                ts.getDeclarationOfKind(moduleExport, 252)) {
                                 break;
                             }
                         }
-                        // ES6 exports are also visible locally (except for 'default'), but commonjs exports are not (except typedefs)
-                        if (name !== "default" /* Default */ && (result = lookup(moduleExports, name, meaning & 2623475 /* ModuleMember */))) {
+                        if (name !== "default" && (result = lookup(moduleExports, name, meaning & 2623475))) {
                             if (ts.isSourceFile(location) && location.commonJsModuleIndicator && !result.declarations.some(ts.isJSDocTypeAlias)) {
                                 result = undefined;
                             }
@@ -30178,48 +24541,37 @@ var ts;
                             }
                         }
                         break;
-                    case 238 /* EnumDeclaration */:
-                        if (result = lookup(getSymbolOfNode(location).exports, name, meaning & 8 /* EnumMember */)) {
+                    case 238:
+                        if (result = lookup(getSymbolOfNode(location).exports, name, meaning & 8)) {
                             break loop;
                         }
                         break;
-                    case 152 /* PropertyDeclaration */:
-                    case 151 /* PropertySignature */:
-                        // TypeScript 1.0 spec (April 2014): 8.4.1
-                        // Initializer expressions for instance member variables are evaluated in the scope
-                        // of the class constructor body but are not permitted to reference parameters or
-                        // local variables of the constructor. This effectively means that entities from outer scopes
-                        // by the same name as a constructor parameter or local variable are inaccessible
-                        // in initializer expressions for instance member variables.
-                        if (ts.isClassLike(location.parent) && !ts.hasModifier(location, 32 /* Static */)) {
+                    case 152:
+                    case 151:
+                        if (ts.isClassLike(location.parent) && !ts.hasModifier(location, 32)) {
                             var ctor = findConstructorDeclaration(location.parent);
                             if (ctor && ctor.locals) {
-                                if (lookup(ctor.locals, name, meaning & 67216319 /* Value */)) {
-                                    // Remember the property node, it will be used later to report appropriate error
+                                if (lookup(ctor.locals, name, meaning & 67216319)) {
                                     propertyWithInvalidInitializer = location;
                                 }
                             }
                         }
                         break;
-                    case 235 /* ClassDeclaration */:
-                    case 205 /* ClassExpression */:
-                    case 236 /* InterfaceDeclaration */:
-                        if (result = lookup(getMembersOfSymbol(getSymbolOfNode(location)), name, meaning & 67901928 /* Type */)) {
+                    case 235:
+                    case 205:
+                    case 236:
+                        if (result = lookup(getMembersOfSymbol(getSymbolOfNode(location)), name, meaning & 67901928)) {
                             if (!isTypeParameterSymbolDeclaredInContainer(result, location)) {
-                                // ignore type parameters not declared in this container
                                 result = undefined;
                                 break;
                             }
-                            if (lastLocation && ts.hasModifier(lastLocation, 32 /* Static */)) {
-                                // TypeScript 1.0 spec (April 2014): 3.4.1
-                                // The scope of a type parameter extends over the entire declaration with which the type
-                                // parameter list is associated, with the exception of static member declarations in classes.
+                            if (lastLocation && ts.hasModifier(lastLocation, 32)) {
                                 error(errorLocation, ts.Diagnostics.Static_members_cannot_reference_class_type_parameters);
                                 return undefined;
                             }
                             break loop;
                         }
-                        if (location.kind === 205 /* ClassExpression */ && meaning & 32 /* Class */) {
+                        if (location.kind === 205 && meaning & 32) {
                             var className = location.name;
                             if (className && name === className.escapedText) {
                                 result = location.symbol;
@@ -30227,11 +24579,10 @@ var ts;
                             }
                         }
                         break;
-                    case 207 /* ExpressionWithTypeArguments */:
-                        // The type parameters of a class are not in scope in the base class expression.
-                        if (lastLocation === location.expression && location.parent.token === 85 /* ExtendsKeyword */) {
+                    case 207:
+                        if (lastLocation === location.expression && location.parent.token === 85) {
                             var container = location.parent.parent;
-                            if (ts.isClassLike(container) && (result = lookup(getSymbolOfNode(container).members, name, meaning & 67901928 /* Type */))) {
+                            if (ts.isClassLike(container) && (result = lookup(getSymbolOfNode(container).members, name, meaning & 67901928))) {
                                 if (nameNotFoundMessage) {
                                     error(errorLocation, ts.Diagnostics.Base_class_expressions_cannot_reference_class_type_parameters);
                                 }
@@ -30239,42 +24590,33 @@ var ts;
                             }
                         }
                         break;
-                    // It is not legal to reference a class's own type parameters from a computed property name that
-                    // belongs to the class. For example:
-                    //
-                    //   function foo<T>() { return '' }
-                    //   class C<T> { // <-- Class's own type parameter T
-                    //       [foo<T>()]() { } // <-- Reference to T from class's own computed property
-                    //   }
-                    //
-                    case 147 /* ComputedPropertyName */:
+                    case 147:
                         grandparent = location.parent.parent;
-                        if (ts.isClassLike(grandparent) || grandparent.kind === 236 /* InterfaceDeclaration */) {
-                            // A reference to this grandparent's type parameters would be an error
-                            if (result = lookup(getSymbolOfNode(grandparent).members, name, meaning & 67901928 /* Type */)) {
+                        if (ts.isClassLike(grandparent) || grandparent.kind === 236) {
+                            if (result = lookup(getSymbolOfNode(grandparent).members, name, meaning & 67901928)) {
                                 error(errorLocation, ts.Diagnostics.A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type);
                                 return undefined;
                             }
                         }
                         break;
-                    case 154 /* MethodDeclaration */:
-                    case 153 /* MethodSignature */:
-                    case 155 /* Constructor */:
-                    case 156 /* GetAccessor */:
-                    case 157 /* SetAccessor */:
-                    case 234 /* FunctionDeclaration */:
-                    case 193 /* ArrowFunction */:
-                        if (meaning & 3 /* Variable */ && name === "arguments") {
+                    case 154:
+                    case 153:
+                    case 155:
+                    case 156:
+                    case 157:
+                    case 234:
+                    case 193:
+                        if (meaning & 3 && name === "arguments") {
                             result = argumentsSymbol;
                             break loop;
                         }
                         break;
-                    case 192 /* FunctionExpression */:
-                        if (meaning & 3 /* Variable */ && name === "arguments") {
+                    case 192:
+                        if (meaning & 3 && name === "arguments") {
                             result = argumentsSymbol;
                             break loop;
                         }
-                        if (meaning & 16 /* Function */) {
+                        if (meaning & 16) {
                             var functionName = location.name;
                             if (functionName && name === functionName.escapedText) {
                                 result = location.symbol;
@@ -30282,31 +24624,16 @@ var ts;
                             }
                         }
                         break;
-                    case 150 /* Decorator */:
-                        // Decorators are resolved at the class declaration. Resolving at the parameter
-                        // or member would result in looking up locals in the method.
-                        //
-                        //   function y() {}
-                        //   class C {
-                        //       method(@y x, y) {} // <-- decorator y should be resolved at the class declaration, not the parameter.
-                        //   }
-                        //
-                        if (location.parent && location.parent.kind === 149 /* Parameter */) {
+                    case 150:
+                        if (location.parent && location.parent.kind === 149) {
                             location = location.parent;
                         }
-                        //
-                        //   function y() {}
-                        //   class C {
-                        //       @y method(x, y) {} // <-- decorator y should be resolved at the class declaration, not the method.
-                        //   }
-                        //
                         if (location.parent && ts.isClassElement(location.parent)) {
                             location = location.parent;
                         }
                         break;
-                    case 297 /* JSDocTypedefTag */:
-                    case 292 /* JSDocCallbackTag */:
-                        // js type aliases do not resolve names from their host, so skip past it
+                    case 297:
+                    case 292:
                         location = ts.getJSDocHost(location);
                         break;
                 }
@@ -30316,15 +24643,12 @@ var ts;
                 lastLocation = location;
                 location = location.parent;
             }
-            // We just climbed up parents looking for the name, meaning that we started in a descendant node of `lastLocation`.
-            // If `result === lastSelfReferenceLocation.symbol`, that means that we are somewhere inside `lastSelfReferenceLocation` looking up a name, and resolving to `lastLocation` itself.
-            // That means that this is a self-reference of `lastLocation`, and shouldn't count this when considering whether `lastLocation` is used.
             if (isUse && result && (!lastSelfReferenceLocation || result !== lastSelfReferenceLocation.symbol)) {
                 result.isReferenced |= meaning;
             }
             if (!result) {
                 if (lastLocation) {
-                    ts.Debug.assert(lastLocation.kind === 274 /* SourceFile */);
+                    ts.Debug.assert(lastLocation.kind === 274);
                     if (lastLocation.commonJsModuleIndicator && name === "exports") {
                         return lastLocation.symbol;
                     }
@@ -30335,7 +24659,7 @@ var ts;
             }
             if (!result) {
                 if (originalLocation && ts.isInJavaScriptFile(originalLocation) && originalLocation.parent) {
-                    if (ts.isRequireCall(originalLocation.parent, /*checkArgumentIsStringLiteralLike*/ false)) {
+                    if (ts.isRequireCall(originalLocation.parent, false)) {
                         return requireSymbol;
                     }
                     if (ts.isIdentifier(originalLocation) && ts.isPropertyAccessExpression(originalLocation.parent) &&
@@ -30347,7 +24671,7 @@ var ts;
             if (!result) {
                 if (nameNotFoundMessage) {
                     if (!errorLocation ||
-                        !checkAndReportErrorForMissingPrefix(errorLocation, name, nameArg) && // TODO: GH#18217
+                        !checkAndReportErrorForMissingPrefix(errorLocation, name, nameArg) &&
                             !checkAndReportErrorForExtendingInterface(errorLocation) &&
                             !checkAndReportErrorForUsingTypeAsNamespace(errorLocation, name, meaning) &&
                             !checkAndReportErrorForUsingTypeAsValue(errorLocation, name, meaning) &&
@@ -30367,39 +24691,24 @@ var ts;
                 }
                 return undefined;
             }
-            // Perform extra checks only if error reporting was requested
             if (nameNotFoundMessage) {
                 if (propertyWithInvalidInitializer) {
-                    // We have a match, but the reference occurred within a property initializer and the identifier also binds
-                    // to a local variable in the constructor where the code will be emitted.
                     var propertyName = propertyWithInvalidInitializer.name;
                     error(errorLocation, ts.Diagnostics.Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor, ts.declarationNameToString(propertyName), diagnosticName(nameArg));
                     return undefined;
                 }
-                // Only check for block-scoped variable if we have an error location and are looking for the
-                // name with variable meaning
-                //      For example,
-                //          declare module foo {
-                //              interface bar {}
-                //          }
-                //      const foo/*1*/: foo/*2*/.bar;
-                // The foo at /*1*/ and /*2*/ will share same symbol with two meanings:
-                // block-scoped variable and namespace module. However, only when we
-                // try to resolve name in /*1*/ which is used in variable position,
-                // we want to check for block-scoped
                 if (errorLocation &&
-                    (meaning & 2 /* BlockScopedVariable */ ||
-                        ((meaning & 32 /* Class */ || meaning & 384 /* Enum */) && (meaning & 67216319 /* Value */) === 67216319 /* Value */))) {
+                    (meaning & 2 ||
+                        ((meaning & 32 || meaning & 384) && (meaning & 67216319) === 67216319))) {
                     var exportOrLocalSymbol = getExportSymbolOfValueSymbolIfExported(result);
-                    if (exportOrLocalSymbol.flags & 2 /* BlockScopedVariable */ || exportOrLocalSymbol.flags & 32 /* Class */ || exportOrLocalSymbol.flags & 384 /* Enum */) {
+                    if (exportOrLocalSymbol.flags & 2 || exportOrLocalSymbol.flags & 32 || exportOrLocalSymbol.flags & 384) {
                         checkResolvedBlockScopedVariable(exportOrLocalSymbol, errorLocation);
                     }
                 }
-                // If we're in an external module, we can't reference value symbols created from UMD export declarations
-                if (result && isInExternalModule && (meaning & 67216319 /* Value */) === 67216319 /* Value */ && !(originalLocation.flags & 2097152 /* JSDoc */)) {
+                if (result && isInExternalModule && (meaning & 67216319) === 67216319 && !(originalLocation.flags & 2097152)) {
                     var decls = result.declarations;
-                    if (decls && decls.length === 1 && decls[0].kind === 242 /* NamespaceExportDeclaration */) {
-                        error(errorLocation, ts.Diagnostics._0_refers_to_a_UMD_global_but_the_current_file_is_a_module_Consider_adding_an_import_instead, ts.unescapeLeadingUnderscores(name)); // TODO: GH#18217
+                    if (decls && decls.length === 1 && decls[0].kind === 242) {
+                        error(errorLocation, ts.Diagnostics._0_refers_to_a_UMD_global_but_the_current_file_is_a_module_Consider_adding_an_import_instead, ts.unescapeLeadingUnderscores(name));
                     }
                 }
             }
@@ -30407,12 +24716,12 @@ var ts;
         }
         function isSelfReferenceLocation(node) {
             switch (node.kind) {
-                case 234 /* FunctionDeclaration */:
-                case 235 /* ClassDeclaration */:
-                case 236 /* InterfaceDeclaration */:
-                case 238 /* EnumDeclaration */:
-                case 237 /* TypeAliasDeclaration */:
-                case 239 /* ModuleDeclaration */: // For `namespace N { N; }`
+                case 234:
+                case 235:
+                case 236:
+                case 238:
+                case 237:
+                case 239:
                     return true;
                 default:
                     return false;
@@ -30424,10 +24733,10 @@ var ts;
         function isTypeParameterSymbolDeclaredInContainer(symbol, container) {
             for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
                 var decl = _a[_i];
-                if (decl.kind === 148 /* TypeParameter */) {
+                if (decl.kind === 148) {
                     var parent = ts.isJSDocTemplateTag(decl.parent) ? ts.getJSDocHost(decl.parent) : decl.parent;
                     if (parent === container) {
-                        return !(ts.isJSDocTemplateTag(decl.parent) && ts.find(decl.parent.parent.tags, ts.isJSDocTypeAlias)); // TODO: GH#18217
+                        return !(ts.isJSDocTemplateTag(decl.parent) && ts.find(decl.parent.parent.tags, ts.isJSDocTypeAlias));
                     }
                 }
             }
@@ -30437,7 +24746,7 @@ var ts;
             if (!ts.isIdentifier(errorLocation) || errorLocation.escapedText !== name || isTypeReferenceIdentifier(errorLocation) || isInTypeQuery(errorLocation)) {
                 return false;
             }
-            var container = ts.getThisContainer(errorLocation, /*includeArrowFunctions*/ false);
+            var container = ts.getThisContainer(errorLocation, false);
             var location = container;
             while (location) {
                 if (ts.isClassLike(location.parent)) {
@@ -30445,16 +24754,13 @@ var ts;
                     if (!classSymbol) {
                         break;
                     }
-                    // Check to see if a static member exists.
                     var constructorType = getTypeOfSymbol(classSymbol);
                     if (getPropertyOfType(constructorType, name)) {
                         error(errorLocation, ts.Diagnostics.Cannot_find_name_0_Did_you_mean_the_static_member_1_0, diagnosticName(nameArg), symbolToString(classSymbol));
                         return true;
                     }
-                    // No static member is present.
-                    // Check if we're in an instance method and look for a relevant instance member.
-                    if (location === container && !ts.hasModifier(location, 32 /* Static */)) {
-                        var instanceType = getDeclaredTypeOfSymbol(classSymbol).thisType; // TODO: GH#18217
+                    if (location === container && !ts.hasModifier(location, 32)) {
+                        var instanceType = getDeclaredTypeOfSymbol(classSymbol).thisType;
                         if (getPropertyOfType(instanceType, name)) {
                             error(errorLocation, ts.Diagnostics.Cannot_find_name_0_Did_you_mean_the_instance_member_this_0, diagnosticName(nameArg));
                             return true;
@@ -30467,34 +24773,29 @@ var ts;
         }
         function checkAndReportErrorForExtendingInterface(errorLocation) {
             var expression = getEntityNameForExtendingInterface(errorLocation);
-            if (expression && resolveEntityName(expression, 64 /* Interface */, /*ignoreErrors*/ true)) {
+            if (expression && resolveEntityName(expression, 64, true)) {
                 error(errorLocation, ts.Diagnostics.Cannot_extend_an_interface_0_Did_you_mean_implements, ts.getTextOfNode(expression));
                 return true;
             }
             return false;
         }
-        /**
-         * Climbs up parents to an ExpressionWithTypeArguments, and returns its expression,
-         * but returns undefined if that expression is not an EntityNameExpression.
-         */
         function getEntityNameForExtendingInterface(node) {
             switch (node.kind) {
-                case 71 /* Identifier */:
-                case 185 /* PropertyAccessExpression */:
+                case 71:
+                case 185:
                     return node.parent ? getEntityNameForExtendingInterface(node.parent) : undefined;
-                case 207 /* ExpressionWithTypeArguments */:
+                case 207:
                     if (ts.isEntityNameExpression(node.expression)) {
                         return node.expression;
                     }
-                // falls through
                 default:
                     return undefined;
             }
         }
         function checkAndReportErrorForUsingTypeAsNamespace(errorLocation, name, meaning) {
-            var namespaceMeaning = 1920 /* Namespace */ | (ts.isInJavaScriptFile(errorLocation) ? 67216319 /* Value */ : 0);
+            var namespaceMeaning = 1920 | (ts.isInJavaScriptFile(errorLocation) ? 67216319 : 0);
             if (meaning === namespaceMeaning) {
-                var symbol = resolveSymbol(resolveName(errorLocation, name, 67901928 /* Type */ & ~namespaceMeaning, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined, /*isUse*/ false));
+                var symbol = resolveSymbol(resolveName(errorLocation, name, 67901928 & ~namespaceMeaning, undefined, undefined, false));
                 var parent = errorLocation.parent;
                 if (symbol) {
                     if (ts.isQualifiedName(parent)) {
@@ -30513,13 +24814,13 @@ var ts;
             return false;
         }
         function checkAndReportErrorForUsingTypeAsValue(errorLocation, name, meaning) {
-            if (meaning & (67216319 /* Value */ & ~1024 /* NamespaceModule */)) {
+            if (meaning & (67216319 & ~1024)) {
                 if (name === "any" || name === "string" || name === "number" || name === "boolean" || name === "never") {
                     error(errorLocation, ts.Diagnostics._0_only_refers_to_a_type_but_is_being_used_as_a_value_here, ts.unescapeLeadingUnderscores(name));
                     return true;
                 }
-                var symbol = resolveSymbol(resolveName(errorLocation, name, 67901928 /* Type */ & ~67216319 /* Value */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined, /*isUse*/ false));
-                if (symbol && !(symbol.flags & 1024 /* NamespaceModule */)) {
+                var symbol = resolveSymbol(resolveName(errorLocation, name, 67901928 & ~67216319, undefined, undefined, false));
+                if (symbol && !(symbol.flags & 1024)) {
                     error(errorLocation, ts.Diagnostics._0_only_refers_to_a_type_but_is_being_used_as_a_value_here, ts.unescapeLeadingUnderscores(name));
                     return true;
                 }
@@ -30527,15 +24828,15 @@ var ts;
             return false;
         }
         function checkAndReportErrorForUsingNamespaceModuleAsValue(errorLocation, name, meaning) {
-            if (meaning & (67216319 /* Value */ & ~1024 /* NamespaceModule */ & ~67901928 /* Type */)) {
-                var symbol = resolveSymbol(resolveName(errorLocation, name, 1024 /* NamespaceModule */ & ~67216319 /* Value */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined, /*isUse*/ false));
+            if (meaning & (67216319 & ~1024 & ~67901928)) {
+                var symbol = resolveSymbol(resolveName(errorLocation, name, 1024 & ~67216319, undefined, undefined, false));
                 if (symbol) {
                     error(errorLocation, ts.Diagnostics.Cannot_use_namespace_0_as_a_value, ts.unescapeLeadingUnderscores(name));
                     return true;
                 }
             }
-            else if (meaning & (67901928 /* Type */ & ~1024 /* NamespaceModule */ & ~67216319 /* Value */)) {
-                var symbol = resolveSymbol(resolveName(errorLocation, name, (512 /* ValueModule */ | 1024 /* NamespaceModule */) & ~67901928 /* Type */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined, /*isUse*/ false));
+            else if (meaning & (67901928 & ~1024 & ~67216319)) {
+                var symbol = resolveSymbol(resolveName(errorLocation, name, (512 | 1024) & ~67901928, undefined, undefined, false));
                 if (symbol) {
                     error(errorLocation, ts.Diagnostics.Cannot_use_namespace_0_as_a_type, ts.unescapeLeadingUnderscores(name));
                     return true;
@@ -30544,39 +24845,34 @@ var ts;
             return false;
         }
         function checkResolvedBlockScopedVariable(result, errorLocation) {
-            ts.Debug.assert(!!(result.flags & 2 /* BlockScopedVariable */ || result.flags & 32 /* Class */ || result.flags & 384 /* Enum */));
-            // Block-scoped variables cannot be used before their definition
-            var declaration = ts.forEach(result.declarations, function (d) { return ts.isBlockOrCatchScoped(d) || ts.isClassLike(d) || (d.kind === 238 /* EnumDeclaration */) ? d : undefined; });
+            ts.Debug.assert(!!(result.flags & 2 || result.flags & 32 || result.flags & 384));
+            var declaration = ts.forEach(result.declarations, function (d) { return ts.isBlockOrCatchScoped(d) || ts.isClassLike(d) || (d.kind === 238) ? d : undefined; });
             if (declaration === undefined)
                 return ts.Debug.fail("Declaration to checkResolvedBlockScopedVariable is undefined");
-            if (!(declaration.flags & 4194304 /* Ambient */) && !isBlockScopedNameDeclaredBeforeUse(declaration, errorLocation)) {
-                if (result.flags & 2 /* BlockScopedVariable */) {
+            if (!(declaration.flags & 4194304) && !isBlockScopedNameDeclaredBeforeUse(declaration, errorLocation)) {
+                if (result.flags & 2) {
                     error(errorLocation, ts.Diagnostics.Block_scoped_variable_0_used_before_its_declaration, ts.declarationNameToString(ts.getNameOfDeclaration(declaration)));
                 }
-                else if (result.flags & 32 /* Class */) {
+                else if (result.flags & 32) {
                     error(errorLocation, ts.Diagnostics.Class_0_used_before_its_declaration, ts.declarationNameToString(ts.getNameOfDeclaration(declaration)));
                 }
-                else if (result.flags & 256 /* RegularEnum */) {
+                else if (result.flags & 256) {
                     error(errorLocation, ts.Diagnostics.Enum_0_used_before_its_declaration, ts.declarationNameToString(ts.getNameOfDeclaration(declaration)));
                 }
             }
         }
-        /* Starting from 'initial' node walk up the parent chain until 'stopAt' node is reached.
-         * If at any point current node is equal to 'parent' node - return true.
-         * Return false if 'stopAt' node is reached or isFunctionLike(current) === true.
-         */
         function isSameScopeDescendentOf(initial, parent, stopAt) {
             return !!parent && !!ts.findAncestor(initial, function (n) { return n === stopAt || ts.isFunctionLike(n) ? "quit" : n === parent; });
         }
         function getAnyImportSyntax(node) {
             switch (node.kind) {
-                case 243 /* ImportEqualsDeclaration */:
+                case 243:
                     return node;
-                case 245 /* ImportClause */:
+                case 245:
                     return node.parent;
-                case 246 /* NamespaceImport */:
+                case 246:
                     return node.parent.parent;
-                case 248 /* ImportSpecifier */:
+                case 248:
                     return node.parent.parent.parent;
                 default:
                     return undefined;
@@ -30586,48 +24882,37 @@ var ts;
             return ts.find(symbol.declarations, ts.isAliasSymbolDeclaration);
         }
         function getTargetOfImportEqualsDeclaration(node, dontResolveAlias) {
-            if (node.moduleReference.kind === 254 /* ExternalModuleReference */) {
+            if (node.moduleReference.kind === 254) {
                 return resolveExternalModuleSymbol(resolveExternalModuleName(node, ts.getExternalModuleImportEqualsDeclarationExpression(node)));
             }
             return getSymbolOfPartOfRightHandSideOfImportEquals(node.moduleReference, dontResolveAlias);
         }
         function resolveExportByName(moduleSymbol, name, dontResolveAlias) {
-            var exportValue = moduleSymbol.exports.get("export=" /* ExportEquals */);
+            var exportValue = moduleSymbol.exports.get("export=");
             return exportValue
                 ? getPropertyOfType(getTypeOfSymbol(exportValue), name)
                 : resolveSymbol(moduleSymbol.exports.get(name), dontResolveAlias);
         }
         function isSyntacticDefault(node) {
-            return ((ts.isExportAssignment(node) && !node.isExportEquals) || ts.hasModifier(node, 512 /* Default */) || ts.isExportSpecifier(node));
+            return ((ts.isExportAssignment(node) && !node.isExportEquals) || ts.hasModifier(node, 512) || ts.isExportSpecifier(node));
         }
         function canHaveSyntheticDefault(file, moduleSymbol, dontResolveAlias) {
             if (!allowSyntheticDefaultImports) {
                 return false;
             }
-            // Declaration files (and ambient modules)
             if (!file || file.isDeclarationFile) {
-                // Definitely cannot have a synthetic default if they have a syntactic default member specified
-                var defaultExportSymbol = resolveExportByName(moduleSymbol, "default" /* Default */, /*dontResolveAlias*/ true); // Dont resolve alias because we want the immediately exported symbol's declaration
+                var defaultExportSymbol = resolveExportByName(moduleSymbol, "default", true);
                 if (defaultExportSymbol && ts.some(defaultExportSymbol.declarations, isSyntacticDefault)) {
                     return false;
                 }
-                // It _might_ still be incorrect to assume there is no __esModule marker on the import at runtime, even if there is no `default` member
-                // So we check a bit more,
                 if (resolveExportByName(moduleSymbol, ts.escapeLeadingUnderscores("__esModule"), dontResolveAlias)) {
-                    // If there is an `__esModule` specified in the declaration (meaning someone explicitly added it or wrote it in their code),
-                    // it definitely is a module and does not have a synthetic default
                     return false;
                 }
-                // There are _many_ declaration files not written with esmodules in mind that still get compiled into a format with __esModule set
-                // Meaning there may be no default at runtime - however to be on the permissive side, we allow access to a synthetic default member
-                // as there is no marker to indicate if the accompanying JS has `__esModule` or not, or is even native esm
                 return true;
             }
-            // TypeScript files never have a synthetic default (as they are always emitted with an __esModule marker) _unless_ they contain an export= statement
             if (!ts.isSourceFileJavaScript(file)) {
                 return hasExportAssignmentSymbol(moduleSymbol);
             }
-            // JS files have a synthetic default if they do not contain ES2015+ module syntax (export = is not valid in js) _and_ do not have an __esModule marker
             return !file.externalModuleIndicator && !resolveExportByName(moduleSymbol, ts.escapeLeadingUnderscores("__esModule"), dontResolveAlias);
         }
         function getTargetOfImportClause(node, dontResolveAlias) {
@@ -30638,7 +24923,7 @@ var ts;
                     exportDefaultSymbol = moduleSymbol;
                 }
                 else {
-                    exportDefaultSymbol = resolveExportByName(moduleSymbol, "default" /* Default */, dontResolveAlias);
+                    exportDefaultSymbol = resolveExportByName(moduleSymbol, "default", dontResolveAlias);
                 }
                 var file = ts.find(moduleSymbol.declarations, ts.isSourceFile);
                 var hasSyntheticDefault = canHaveSyntheticDefault(file, moduleSymbol, dontResolveAlias);
@@ -30646,7 +24931,6 @@ var ts;
                     error(node.name, ts.Diagnostics.Module_0_has_no_default_export, symbolToString(moduleSymbol));
                 }
                 else if (hasSyntheticDefault) {
-                    // per emit behavior, a synthetic default overrides a "real" .default member if `__esModule` is not present
                     return resolveExternalModuleSymbol(moduleSymbol, dontResolveAlias) || resolveSymbol(moduleSymbol, dontResolveAlias);
                 }
                 return exportDefaultSymbol;
@@ -30656,29 +24940,11 @@ var ts;
             var moduleSpecifier = node.parent.parent.moduleSpecifier;
             return resolveESModuleSymbol(resolveExternalModuleName(node, moduleSpecifier), moduleSpecifier, dontResolveAlias);
         }
-        // This function creates a synthetic symbol that combines the value side of one symbol with the
-        // type/namespace side of another symbol. Consider this example:
-        //
-        //   declare module graphics {
-        //       interface Point {
-        //           x: number;
-        //           y: number;
-        //       }
-        //   }
-        //   declare var graphics: {
-        //       Point: new (x: number, y: number) => graphics.Point;
-        //   }
-        //   declare module "graphics" {
-        //       export = graphics;
-        //   }
-        //
-        // An 'import { Point } from "graphics"' needs to create a symbol that combines the value side 'Point'
-        // property with the type/namespace side interface 'Point'.
         function combineValueAndTypeSymbols(valueSymbol, typeSymbol) {
             if (valueSymbol === unknownSymbol && typeSymbol === unknownSymbol) {
                 return unknownSymbol;
             }
-            if (valueSymbol.flags & (67901928 /* Type */ | 1920 /* Namespace */)) {
+            if (valueSymbol.flags & (67901928 | 1920)) {
                 return valueSymbol;
             }
             var result = createSymbol(valueSymbol.flags | typeSymbol.flags, valueSymbol.escapedName);
@@ -30693,21 +24959,21 @@ var ts;
             return result;
         }
         function getExportOfModule(symbol, name, dontResolveAlias) {
-            if (symbol.flags & 1536 /* Module */) {
+            if (symbol.flags & 1536) {
                 return resolveSymbol(getExportsOfSymbol(symbol).get(name), dontResolveAlias);
             }
         }
         function getPropertyOfVariable(symbol, name) {
-            if (symbol.flags & 3 /* Variable */) {
+            if (symbol.flags & 3) {
                 var typeAnnotation = symbol.valueDeclaration.type;
                 if (typeAnnotation) {
-                    return resolveSymbol(getPropertyOfType(getTypeFromTypeNode(typeAnnotation), name)); // TODO: GH#18217
+                    return resolveSymbol(getPropertyOfType(getTypeFromTypeNode(typeAnnotation), name));
                 }
             }
         }
         function getExternalModuleMember(node, specifier, dontResolveAlias) {
             if (dontResolveAlias === void 0) { dontResolveAlias = false; }
-            var moduleSymbol = resolveExternalModuleName(node, node.moduleSpecifier); // TODO: GH#18217
+            var moduleSymbol = resolveExternalModuleName(node, node.moduleSpecifier);
             var targetSymbol = resolveESModuleSymbol(moduleSymbol, node.moduleSpecifier, dontResolveAlias);
             if (targetSymbol) {
                 var name = specifier.propertyName || specifier.name;
@@ -30716,18 +24982,15 @@ var ts;
                         return moduleSymbol;
                     }
                     var symbolFromVariable = void 0;
-                    // First check if module was specified with "export=". If so, get the member from the resolved type
-                    if (moduleSymbol && moduleSymbol.exports && moduleSymbol.exports.get("export=" /* ExportEquals */)) {
+                    if (moduleSymbol && moduleSymbol.exports && moduleSymbol.exports.get("export=")) {
                         symbolFromVariable = getPropertyOfType(getTypeOfSymbol(targetSymbol), name.escapedText);
                     }
                     else {
                         symbolFromVariable = getPropertyOfVariable(targetSymbol, name.escapedText);
                     }
-                    // if symbolFromVariable is export - get its final target
                     symbolFromVariable = resolveSymbol(symbolFromVariable, dontResolveAlias);
                     var symbolFromModule = getExportOfModule(targetSymbol, name.escapedText, dontResolveAlias);
-                    // If the export member we're looking for is default, and there is no real default but allowSyntheticDefaultImports is on, return the entire module as the default
-                    if (!symbolFromModule && allowSyntheticDefaultImports && name.escapedText === "default" /* Default */) {
+                    if (!symbolFromModule && allowSyntheticDefaultImports && name.escapedText === "default") {
                         symbolFromModule = resolveExternalModuleSymbol(moduleSymbol, dontResolveAlias) || resolveSymbol(moduleSymbol, dontResolveAlias);
                     }
                     var symbol = symbolFromModule && symbolFromVariable && symbolFromModule !== symbolFromVariable ?
@@ -30757,14 +25020,14 @@ var ts;
         function getTargetOfExportSpecifier(node, meaning, dontResolveAlias) {
             return node.parent.parent.moduleSpecifier ?
                 getExternalModuleMember(node.parent.parent, node, dontResolveAlias) :
-                resolveEntityName(node.propertyName || node.name, meaning, /*ignoreErrors*/ false, dontResolveAlias);
+                resolveEntityName(node.propertyName || node.name, meaning, false, dontResolveAlias);
         }
         function getTargetOfExportAssignment(node, dontResolveAlias) {
             var expression = (ts.isExportAssignment(node) ? node.expression : node.right);
             if (ts.isClassExpression(expression)) {
                 return checkExpression(expression).symbol;
             }
-            var aliasLike = resolveEntityName(expression, 67216319 /* Value */ | 67901928 /* Type */ | 1920 /* Namespace */, /*ignoreErrors*/ true, dontResolveAlias);
+            var aliasLike = resolveEntityName(expression, 67216319 | 67901928 | 1920, true, dontResolveAlias);
             if (aliasLike) {
                 return aliasLike;
             }
@@ -30774,40 +25037,36 @@ var ts;
         function getTargetOfAliasDeclaration(node, dontRecursivelyResolve) {
             if (dontRecursivelyResolve === void 0) { dontRecursivelyResolve = false; }
             switch (node.kind) {
-                case 243 /* ImportEqualsDeclaration */:
+                case 243:
                     return getTargetOfImportEqualsDeclaration(node, dontRecursivelyResolve);
-                case 245 /* ImportClause */:
+                case 245:
                     return getTargetOfImportClause(node, dontRecursivelyResolve);
-                case 246 /* NamespaceImport */:
+                case 246:
                     return getTargetOfNamespaceImport(node, dontRecursivelyResolve);
-                case 248 /* ImportSpecifier */:
+                case 248:
                     return getTargetOfImportSpecifier(node, dontRecursivelyResolve);
-                case 252 /* ExportSpecifier */:
-                    return getTargetOfExportSpecifier(node, 67216319 /* Value */ | 67901928 /* Type */ | 1920 /* Namespace */, dontRecursivelyResolve);
-                case 249 /* ExportAssignment */:
-                case 200 /* BinaryExpression */:
+                case 252:
+                    return getTargetOfExportSpecifier(node, 67216319 | 67901928 | 1920, dontRecursivelyResolve);
+                case 249:
+                case 200:
                     return getTargetOfExportAssignment(node, dontRecursivelyResolve);
-                case 242 /* NamespaceExportDeclaration */:
+                case 242:
                     return getTargetOfNamespaceExportDeclaration(node, dontRecursivelyResolve);
                 default:
                     return ts.Debug.fail();
             }
         }
-        /**
-         * Indicates that a symbol is an alias that does not merge with a local declaration.
-         * OR Is a JSContainer which may merge an alias with a local declaration
-         */
         function isNonLocalAlias(symbol, excludes) {
-            if (excludes === void 0) { excludes = 67216319 /* Value */ | 67901928 /* Type */ | 1920 /* Namespace */; }
+            if (excludes === void 0) { excludes = 67216319 | 67901928 | 1920; }
             if (!symbol)
                 return false;
-            return (symbol.flags & (2097152 /* Alias */ | excludes)) === 2097152 /* Alias */ || !!(symbol.flags & 2097152 /* Alias */ && symbol.flags & 67108864 /* JSContainer */);
+            return (symbol.flags & (2097152 | excludes)) === 2097152 || !!(symbol.flags & 2097152 && symbol.flags & 67108864);
         }
         function resolveSymbol(symbol, dontResolveAlias) {
             return !dontResolveAlias && isNonLocalAlias(symbol) ? resolveAlias(symbol) : symbol;
         }
         function resolveAlias(symbol) {
-            ts.Debug.assert((symbol.flags & 2097152 /* Alias */) !== 0, "Should only get Alias here.");
+            ts.Debug.assert((symbol.flags & 2097152) !== 0, "Should only get Alias here.");
             var links = getSymbolLinks(symbol);
             if (!links.target) {
                 links.target = resolvingSymbol;
@@ -30832,15 +25091,12 @@ var ts;
             var target = resolveAlias(symbol);
             if (target) {
                 var markAlias = target === unknownSymbol ||
-                    ((target.flags & 67216319 /* Value */) && !isConstEnumOrConstEnumOnlyModule(target));
+                    ((target.flags & 67216319) && !isConstEnumOrConstEnumOnlyModule(target));
                 if (markAlias) {
                     markAliasSymbolAsReferenced(symbol);
                 }
             }
         }
-        // When an alias symbol is referenced, we need to mark the entity it references as referenced and in turn repeat that until
-        // we reach a non-alias or an exported entity (which is always considered referenced). We do this by checking the target of
-        // the alias as an expression (which recursively takes us back here if the target references another alias).
         function markAliasSymbolAsReferenced(symbol) {
             var links = getSymbolLinks(symbol);
             if (!links.referenced) {
@@ -30848,66 +25104,50 @@ var ts;
                 var node = getDeclarationOfAliasSymbol(symbol);
                 if (!node)
                     return ts.Debug.fail();
-                if (node.kind === 249 /* ExportAssignment */) {
-                    // export default <symbol>
+                if (node.kind === 249) {
                     checkExpressionCached(node.expression);
                 }
-                else if (node.kind === 252 /* ExportSpecifier */) {
-                    // export { <symbol> } or export { <symbol> as foo }
+                else if (node.kind === 252) {
                     checkExpressionCached(node.propertyName || node.name);
                 }
                 else if (ts.isInternalModuleImportEqualsDeclaration(node)) {
-                    // import foo = <symbol>
                     checkExpressionCached(node.moduleReference);
                 }
             }
         }
-        // This function is only for imports with entity names
         function getSymbolOfPartOfRightHandSideOfImportEquals(entityName, dontResolveAlias) {
-            // There are three things we might try to look for. In the following examples,
-            // the search term is enclosed in |...|:
-            //
-            //     import a = |b|; // Namespace
-            //     import a = |b.c|; // Value, type, namespace
-            //     import a = |b.c|.d; // Namespace
-            if (entityName.kind === 71 /* Identifier */ && ts.isRightSideOfQualifiedNameOrPropertyAccess(entityName)) {
+            if (entityName.kind === 71 && ts.isRightSideOfQualifiedNameOrPropertyAccess(entityName)) {
                 entityName = entityName.parent;
             }
-            // Check for case 1 and 3 in the above example
-            if (entityName.kind === 71 /* Identifier */ || entityName.parent.kind === 146 /* QualifiedName */) {
-                return resolveEntityName(entityName, 1920 /* Namespace */, /*ignoreErrors*/ false, dontResolveAlias);
+            if (entityName.kind === 71 || entityName.parent.kind === 146) {
+                return resolveEntityName(entityName, 1920, false, dontResolveAlias);
             }
             else {
-                // Case 2 in above example
-                // entityName.kind could be a QualifiedName or a Missing identifier
-                ts.Debug.assert(entityName.parent.kind === 243 /* ImportEqualsDeclaration */);
-                return resolveEntityName(entityName, 67216319 /* Value */ | 67901928 /* Type */ | 1920 /* Namespace */, /*ignoreErrors*/ false, dontResolveAlias);
+                ts.Debug.assert(entityName.parent.kind === 243);
+                return resolveEntityName(entityName, 67216319 | 67901928 | 1920, false, dontResolveAlias);
             }
         }
         function getFullyQualifiedName(symbol) {
             return symbol.parent ? getFullyQualifiedName(symbol.parent) + "." + symbolToString(symbol) : symbolToString(symbol);
         }
-        /**
-         * Resolves a qualified name and any involved aliases.
-         */
         function resolveEntityName(name, meaning, ignoreErrors, dontResolveAlias, location) {
             if (ts.nodeIsMissing(name)) {
                 return undefined;
             }
-            var namespaceMeaning = 1920 /* Namespace */ | (ts.isInJavaScriptFile(name) ? meaning & 67216319 /* Value */ : 0);
+            var namespaceMeaning = 1920 | (ts.isInJavaScriptFile(name) ? meaning & 67216319 : 0);
             var symbol;
-            if (name.kind === 71 /* Identifier */) {
+            if (name.kind === 71) {
                 var message = meaning === namespaceMeaning ? ts.Diagnostics.Cannot_find_namespace_0 : ts.Diagnostics.Cannot_find_name_0;
                 var symbolFromJSPrototype = ts.isInJavaScriptFile(name) ? resolveEntityNameFromJSSpecialAssignment(name, meaning) : undefined;
-                symbol = resolveName(location || name, name.escapedText, meaning, ignoreErrors || symbolFromJSPrototype ? undefined : message, name, /*isUse*/ true);
+                symbol = resolveName(location || name, name.escapedText, meaning, ignoreErrors || symbolFromJSPrototype ? undefined : message, name, true);
                 if (!symbol) {
                     return symbolFromJSPrototype;
                 }
             }
-            else if (name.kind === 146 /* QualifiedName */ || name.kind === 185 /* PropertyAccessExpression */) {
-                var left = name.kind === 146 /* QualifiedName */ ? name.left : name.expression;
-                var right = name.kind === 146 /* QualifiedName */ ? name.right : name.name;
-                var namespace = resolveEntityName(left, namespaceMeaning, ignoreErrors, /*dontResolveAlias*/ false, location);
+            else if (name.kind === 146 || name.kind === 185) {
+                var left = name.kind === 146 ? name.left : name.expression;
+                var right = name.kind === 146 ? name.right : name.name;
+                var namespace = resolveEntityName(left, namespaceMeaning, ignoreErrors, false, location);
                 if (!namespace || ts.nodeIsMissing(right)) {
                     return undefined;
                 }
@@ -30940,32 +25180,26 @@ var ts;
             else {
                 throw ts.Debug.assertNever(name, "Unknown entity name kind.");
             }
-            ts.Debug.assert((ts.getCheckFlags(symbol) & 1 /* Instantiated */) === 0, "Should never get an instantiated symbol here.");
+            ts.Debug.assert((ts.getCheckFlags(symbol) & 1) === 0, "Should never get an instantiated symbol here.");
             return (symbol.flags & meaning) || dontResolveAlias ? symbol : resolveAlias(symbol);
         }
-        /**
-         * 1. For prototype-property methods like `A.prototype.m = function () ...`, try to resolve names in the scope of `A` too.
-         * Note that prototype-property assignment to locations outside the current file (eg globals) doesn't work, so
-         * name resolution won't work either.
-         * 2. For property assignments like `{ x: function f () { } }`, try to resolve names in the scope of `f` too.
-         */
         function resolveEntityNameFromJSSpecialAssignment(name, meaning) {
             if (isJSDocTypeReference(name.parent)) {
                 var secondaryLocation = getJSSpecialAssignmentLocation(name.parent);
                 if (secondaryLocation) {
-                    return resolveName(secondaryLocation, name.escapedText, meaning, /*nameNotFoundMessage*/ undefined, name, /*isUse*/ true);
+                    return resolveName(secondaryLocation, name.escapedText, meaning, undefined, name, true);
                 }
             }
         }
         function getJSSpecialAssignmentLocation(node) {
-            var typeAlias = ts.findAncestor(node, function (node) { return !(ts.isJSDocNode(node) || node.flags & 2097152 /* JSDoc */) ? "quit" : ts.isJSDocTypeAlias(node); });
+            var typeAlias = ts.findAncestor(node, function (node) { return !(ts.isJSDocNode(node) || node.flags & 2097152) ? "quit" : ts.isJSDocTypeAlias(node); });
             if (typeAlias) {
                 return;
             }
             var host = ts.getJSDocHost(node);
             if (ts.isExpressionStatement(host) &&
                 ts.isBinaryExpression(host.expression) &&
-                ts.getSpecialPropertyAssignmentKind(host.expression) === 3 /* PrototypeProperty */) {
+                ts.getSpecialPropertyAssignmentKind(host.expression) === 3) {
                 var symbol = getSymbolOfNode(host.expression.left);
                 return symbol && symbol.parent.valueDeclaration;
             }
@@ -30994,24 +25228,22 @@ var ts;
                 var withoutAtTypePrefix = ts.removePrefix(moduleReference, "@types/");
                 error(errorNode, diag, withoutAtTypePrefix, moduleReference);
             }
-            var ambientModule = tryFindAmbientModule(moduleReference, /*withAugmentations*/ true);
+            var ambientModule = tryFindAmbientModule(moduleReference, true);
             if (ambientModule) {
                 return ambientModule;
             }
             var currentSourceFile = ts.getSourceFileOfNode(location);
-            var resolvedModule = ts.getResolvedModule(currentSourceFile, moduleReference); // TODO: GH#18217
+            var resolvedModule = ts.getResolvedModule(currentSourceFile, moduleReference);
             var resolutionDiagnostic = resolvedModule && ts.getResolutionDiagnostic(compilerOptions, resolvedModule);
             var sourceFile = resolvedModule && !resolutionDiagnostic && host.getSourceFile(resolvedModule.resolvedFileName);
             if (sourceFile) {
                 if (sourceFile.symbol) {
                     if (resolvedModule.isExternalLibraryImport && !ts.extensionIsTypeScript(resolvedModule.extension)) {
-                        errorOnImplicitAnyModule(/*isError*/ false, errorNode, resolvedModule, moduleReference);
+                        errorOnImplicitAnyModule(false, errorNode, resolvedModule, moduleReference);
                     }
-                    // merged symbol is module declaration symbol combined with all augmentations
                     return getMergedSymbol(sourceFile.symbol);
                 }
                 if (moduleNotFoundError) {
-                    // report errors only if it was requested
                     error(errorNode, ts.Diagnostics.File_0_is_not_a_module, sourceFile.fileName);
                 }
                 return undefined;
@@ -31022,26 +25254,23 @@ var ts;
                     return getMergedSymbol(pattern.symbol);
                 }
             }
-            // May be an untyped module. If so, ignore resolutionDiagnostic.
             if (resolvedModule && !ts.resolutionExtensionIsTypeScriptOrJson(resolvedModule.extension) && resolutionDiagnostic === undefined || resolutionDiagnostic === ts.Diagnostics.Could_not_find_a_declaration_file_for_module_0_1_implicitly_has_an_any_type) {
                 if (isForAugmentation) {
                     var diag = ts.Diagnostics.Invalid_module_name_in_augmentation_Module_0_resolves_to_an_untyped_module_at_1_which_cannot_be_augmented;
                     error(errorNode, diag, moduleReference, resolvedModule.resolvedFileName);
                 }
                 else {
-                    errorOnImplicitAnyModule(/*isError*/ noImplicitAny && !!moduleNotFoundError, errorNode, resolvedModule, moduleReference);
+                    errorOnImplicitAnyModule(noImplicitAny && !!moduleNotFoundError, errorNode, resolvedModule, moduleReference);
                 }
-                // Failed imports and untyped modules are both treated in an untyped manner; only difference is whether we give a diagnostic first.
                 return undefined;
             }
             if (moduleNotFoundError) {
-                // For relative paths, see if this was possibly a projectReference redirect
                 if (ts.pathIsRelative(moduleReference)) {
                     var sourceFile_1 = ts.getSourceFileOfNode(location);
                     var redirects = sourceFile_1.redirectedReferences;
                     if (redirects) {
                         var normalizedTargetPath = ts.getNormalizedAbsolutePath(moduleReference, ts.getDirectoryPath(sourceFile_1.fileName));
-                        for (var _i = 0, _a = [".ts" /* Ts */, ".tsx" /* Tsx */]; _i < _a.length; _i++) {
+                        for (var _i = 0, _a = [".ts", ".tsx"]; _i < _a.length; _i++) {
                             var ext = _a[_i];
                             var probePath = normalizedTargetPath + ext;
                             if (redirects.indexOf(probePath) >= 0) {
@@ -31069,12 +25298,11 @@ var ts;
         }
         function errorOnImplicitAnyModule(isError, errorNode, _a, moduleReference) {
             var packageId = _a.packageId, resolvedFileName = _a.resolvedFileName;
-            var errorInfo = packageId && ts.chainDiagnosticMessages(
-            /*details*/ undefined, ts.Diagnostics.Try_npm_install_types_Slash_0_if_it_exists_or_add_a_new_declaration_d_ts_file_containing_declare_module_0, ts.getMangledNameForScopedPackage(packageId.name));
+            var errorInfo = packageId && ts.chainDiagnosticMessages(undefined, ts.Diagnostics.Try_npm_install_types_Slash_0_if_it_exists_or_add_a_new_declaration_d_ts_file_containing_declare_module_0, ts.getMangledNameForScopedPackage(packageId.name));
             errorOrSuggestion(isError, errorNode, ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Could_not_find_a_declaration_file_for_module_0_1_implicitly_has_an_any_type, moduleReference, resolvedFileName));
         }
         function resolveExternalModuleSymbol(moduleSymbol, dontResolveAlias) {
-            return moduleSymbol && getMergedSymbol(getCommonJsExportEquals(resolveSymbol(moduleSymbol.exports.get("export=" /* ExportEquals */), dontResolveAlias), moduleSymbol)) || moduleSymbol;
+            return moduleSymbol && getMergedSymbol(getCommonJsExportEquals(resolveSymbol(moduleSymbol.exports.get("export="), dontResolveAlias), moduleSymbol)) || moduleSymbol;
         }
         function getCommonJsExportEquals(exported, moduleSymbol) {
             if (!exported || moduleSymbol.exports.size === 1) {
@@ -31082,23 +25310,20 @@ var ts;
             }
             var merged = cloneSymbol(exported);
             if (merged.exports === undefined) {
-                merged.flags = merged.flags | 512 /* ValueModule */;
+                merged.flags = merged.flags | 512;
                 merged.exports = ts.createSymbolTable();
             }
             moduleSymbol.exports.forEach(function (s, name) {
-                if (name === "export=" /* ExportEquals */)
+                if (name === "export=")
                     return;
                 merged.exports.set(name, merged.exports.has(name) ? mergeSymbol(merged.exports.get(name), s) : s);
             });
             return merged;
         }
-        // An external module with an 'export =' declaration may be referenced as an ES6 module provided the 'export ='
-        // references a symbol that is at least declared as a module or a variable. The target of the 'export =' may
-        // combine other declarations with the module or variable (e.g. a class/module, function/module, interface/variable).
         function resolveESModuleSymbol(moduleSymbol, referencingLocation, dontResolveAlias) {
             var symbol = resolveExternalModuleSymbol(moduleSymbol, dontResolveAlias);
             if (!dontResolveAlias && symbol) {
-                if (!(symbol.flags & (1536 /* Module */ | 3 /* Variable */))) {
+                if (!(symbol.flags & (1536 | 3))) {
                     error(referencingLocation, ts.Diagnostics.Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct, symbolToString(moduleSymbol));
                     return symbol;
                 }
@@ -31107,13 +25332,12 @@ var ts;
                     if ((ts.isImportDeclaration(referenceParent) && ts.getNamespaceDeclarationNode(referenceParent)) ||
                         ts.isImportCall(referenceParent)) {
                         var type = getTypeOfSymbol(symbol);
-                        var sigs = getSignaturesOfStructuredType(type, 0 /* Call */);
+                        var sigs = getSignaturesOfStructuredType(type, 0);
                         if (!sigs || !sigs.length) {
-                            sigs = getSignaturesOfStructuredType(type, 1 /* Construct */);
+                            sigs = getSignaturesOfStructuredType(type, 1);
                         }
                         if (sigs && sigs.length) {
                             var moduleType = getTypeWithSyntheticDefaultImportType(type, symbol, moduleSymbol);
-                            // Create a new symbol which has the module's type less the call and construct signatures
                             var result = createSymbol(symbol.flags, symbol.escapedName);
                             result.declarations = symbol.declarations ? symbol.declarations.slice() : [];
                             result.parent = symbol.parent;
@@ -31127,7 +25351,7 @@ var ts;
                                 result.members = ts.cloneMap(symbol.members);
                             if (symbol.exports)
                                 result.exports = ts.cloneMap(symbol.exports);
-                            var resolvedModuleType = resolveStructuredTypeMembers(moduleType); // Should already be resolved from the signature checks above
+                            var resolvedModuleType = resolveStructuredTypeMembers(moduleType);
                             result.type = createAnonymousType(result, resolvedModuleType.members, ts.emptyArray, ts.emptyArray, resolvedModuleType.stringIndexInfo, resolvedModuleType.numberIndexInfo);
                             return result;
                         }
@@ -31137,7 +25361,7 @@ var ts;
             return symbol;
         }
         function hasExportAssignmentSymbol(moduleSymbol) {
-            return moduleSymbol.exports.get("export=" /* ExportEquals */) !== undefined;
+            return moduleSymbol.exports.get("export=") !== undefined;
         }
         function getExportsOfModuleAsArray(moduleSymbol) {
             return symbolsToArray(getExportsOfModule(moduleSymbol));
@@ -31166,26 +25390,22 @@ var ts;
                 return undefined;
             }
             var type = getTypeOfSymbol(exportEquals);
-            return type.flags & 32764 /* Primitive */ ? undefined : getPropertyOfType(type, memberName);
+            return type.flags & 32764 ? undefined : getPropertyOfType(type, memberName);
         }
         function getExportsOfSymbol(symbol) {
-            return symbol.flags & 32 /* Class */ ? getResolvedMembersOrExportsOfSymbol(symbol, "resolvedExports" /* resolvedExports */) :
-                symbol.flags & 1536 /* Module */ ? getExportsOfModule(symbol) :
+            return symbol.flags & 32 ? getResolvedMembersOrExportsOfSymbol(symbol, "resolvedExports") :
+                symbol.flags & 1536 ? getExportsOfModule(symbol) :
                     symbol.exports || emptySymbols;
         }
         function getExportsOfModule(moduleSymbol) {
             var links = getSymbolLinks(moduleSymbol);
             return links.resolvedExports || (links.resolvedExports = getExportsOfModuleWorker(moduleSymbol));
         }
-        /**
-         * Extends one symbol table with another while collecting information on name collisions for error message generation into the `lookupTable` argument
-         * Not passing `lookupTable` and `exportNode` disables this collection, and just extends the tables
-         */
         function extendExportSymbols(target, source, lookupTable, exportNode) {
             if (!source)
                 return;
             source.forEach(function (sourceSymbol, id) {
-                if (id === "default" /* Default */)
+                if (id === "default")
                     return;
                 var targetSymbol = target.get(id);
                 if (!targetSymbol) {
@@ -31209,18 +25429,14 @@ var ts;
         }
         function getExportsOfModuleWorker(moduleSymbol) {
             var visitedSymbols = [];
-            // A module defined by an 'export=' consists on one export that needs to be resolved
             moduleSymbol = resolveExternalModuleSymbol(moduleSymbol);
             return visit(moduleSymbol) || emptySymbols;
-            // The ES6 spec permits export * declarations in a module to circularly reference the module itself. For example,
-            // module 'a' can 'export * from "b"' and 'b' can 'export * from "a"' without error.
             function visit(symbol) {
-                if (!(symbol && symbol.flags & 1952 /* HasExports */ && ts.pushIfUnique(visitedSymbols, symbol))) {
+                if (!(symbol && symbol.flags & 1955 && ts.pushIfUnique(visitedSymbols, symbol))) {
                     return;
                 }
                 var symbols = ts.cloneMap(symbol.exports);
-                // All export * declarations are collected in an __export symbol by the binder
-                var exportStars = symbol.exports.get("__export" /* ExportStar */);
+                var exportStars = symbol.exports.get("__export");
                 if (exportStars) {
                     var nestedSymbols = ts.createSymbolTable();
                     var lookupTable_1 = ts.createMap();
@@ -31232,7 +25448,6 @@ var ts;
                     }
                     lookupTable_1.forEach(function (_a, id) {
                         var exportsWithDuplicate = _a.exportsWithDuplicate;
-                        // It's not an error if the file with multiple `export *`s with duplicate names exports a member with that name itself
                         if (id === "export=" || !(exportsWithDuplicate && exportsWithDuplicate.length) || symbols.has(id)) {
                             return;
                         }
@@ -31256,10 +25471,6 @@ var ts;
         function getParentOfSymbol(symbol) {
             return getMergedSymbol(symbol.parent && getLateBoundSymbol(symbol.parent));
         }
-        /**
-         * Attempts to find the symbol corresponding to the container a symbol is in - usually this
-         * is just its' `.parent`, but for locals, this value is `undefined`
-         */
         function getContainerOfSymbol(symbol) {
             var container = getParentOfSymbol(symbol);
             if (container) {
@@ -31274,7 +25485,6 @@ var ts;
         }
         function getAliasForSymbolInContainer(container, symbol) {
             if (container === getParentOfSymbol(symbol)) {
-                // fast path, `symbol` is either already the alias or isn't aliased
                 return symbol;
             }
             var exports = getExportsOfSymbol(container);
@@ -31294,18 +25504,18 @@ var ts;
             }
         }
         function getExportSymbolOfValueSymbolIfExported(symbol) {
-            return symbol && (symbol.flags & 1048576 /* ExportValue */) !== 0
+            return symbol && (symbol.flags & 1048576) !== 0
                 ? getMergedSymbol(symbol.exportSymbol)
                 : symbol;
         }
         function symbolIsValue(symbol) {
-            return !!(symbol.flags & 67216319 /* Value */ || symbol.flags & 2097152 /* Alias */ && resolveAlias(symbol).flags & 67216319 /* Value */);
+            return !!(symbol.flags & 67216319 || symbol.flags & 2097152 && resolveAlias(symbol).flags & 67216319);
         }
         function findConstructorDeclaration(node) {
             var members = node.members;
-            for (var _i = 0, members_1 = members; _i < members_1.length; _i++) {
-                var member = members_1[_i];
-                if (member.kind === 155 /* Constructor */ && ts.nodeIsPresent(member.body)) {
+            for (var _i = 0, members_2 = members; _i < members_2.length; _i++) {
+                var member = members_2[_i];
+                if (member.kind === 155 && ts.nodeIsPresent(member.body)) {
                     return member;
                 }
             }
@@ -31323,12 +25533,12 @@ var ts;
         }
         function createBooleanType(trueFalseTypes) {
             var type = getUnionType(trueFalseTypes);
-            type.flags |= 16 /* Boolean */;
+            type.flags |= 16;
             type.intrinsicName = "boolean";
             return type;
         }
         function createObjectType(objectFlags, symbol) {
-            var type = createType(131072 /* Object */);
+            var type = createType(131072);
             type.objectFlags = objectFlags;
             type.symbol = symbol;
             return type;
@@ -31336,15 +25546,11 @@ var ts;
         function createTypeofType() {
             return getUnionType(ts.arrayFrom(typeofEQFacts.keys(), getLiteralType));
         }
-        // A reserved member name starts with two underscores, but the third character cannot be an underscore
-        // or the @ symbol. A third underscore indicates an escaped form of an identifer that started
-        // with at least two underscores. The @ character indicates that the name is denoted by a well known ES
-        // Symbol instance.
         function isReservedMemberName(name) {
-            return name.charCodeAt(0) === 95 /* _ */ &&
-                name.charCodeAt(1) === 95 /* _ */ &&
-                name.charCodeAt(2) !== 95 /* _ */ &&
-                name.charCodeAt(2) !== 64 /* at */;
+            return name.charCodeAt(0) === 95 &&
+                name.charCodeAt(1) === 95 &&
+                name.charCodeAt(2) !== 95 &&
+                name.charCodeAt(2) !== 64;
         }
         function getNamedMembers(members) {
             var result;
@@ -31371,24 +25577,22 @@ var ts;
             return type;
         }
         function createAnonymousType(symbol, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo) {
-            return setStructuredTypeMembers(createObjectType(16 /* Anonymous */, symbol), members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+            return setStructuredTypeMembers(createObjectType(16, symbol), members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
         }
         function forEachSymbolTableInScope(enclosingDeclaration, callback) {
             var result;
             for (var location = enclosingDeclaration; location; location = location.parent) {
-                // Locals of a source file are not in scope (because they get merged into the global symbol table)
                 if (location.locals && !isGlobalSourceFile(location)) {
                     if (result = callback(location.locals)) {
                         return result;
                     }
                 }
                 switch (location.kind) {
-                    case 274 /* SourceFile */:
+                    case 274:
                         if (!ts.isExternalOrCommonJsModule(location)) {
                             break;
                         }
-                    // falls through
-                    case 239 /* ModuleDeclaration */:
+                    case 239:
                         if (result = callback(getSymbolOfNode(location).exports)) {
                             return result;
                         }
@@ -31398,8 +25602,7 @@ var ts;
             return callback(globals);
         }
         function getQualifiedLeftMeaning(rightMeaning) {
-            // If we are looking in value space, the parent meaning is value, other wise it is namespace
-            return rightMeaning === 67216319 /* Value */ ? 67216319 /* Value */ : 1920 /* Namespace */;
+            return rightMeaning === 67216319 ? 67216319 : 1920;
         }
         function getAccessibleSymbolChain(symbol, enclosingDeclaration, meaning, useOnlyExternalAliasing, visitedSymbolTablesMap) {
             if (visitedSymbolTablesMap === void 0) { visitedSymbolTablesMap = ts.createMap(); }
@@ -31412,9 +25615,6 @@ var ts;
                 visitedSymbolTablesMap.set(id, visitedSymbolTables = []);
             }
             return forEachSymbolTableInScope(enclosingDeclaration, getAccessibleSymbolChainFromSymbolTable);
-            /**
-             * @param {ignoreQualification} boolean Set when a symbol is being looked for through the exports of another symbol (meaning we have a route to qualify it already)
-             */
             function getAccessibleSymbolChainFromSymbolTable(symbols, ignoreQualification) {
                 if (!ts.pushIfUnique(visitedSymbolTables, symbols)) {
                     return undefined;
@@ -31424,46 +25624,36 @@ var ts;
                 return result;
             }
             function canQualifySymbol(symbolFromSymbolTable, meaning) {
-                // If the symbol is equivalent and doesn't need further qualification, this symbol is accessible
                 return !needsQualification(symbolFromSymbolTable, enclosingDeclaration, meaning) ||
-                    // If symbol needs qualification, make sure that parent is accessible, if it is then this symbol is accessible too
                     !!getAccessibleSymbolChain(symbolFromSymbolTable.parent, enclosingDeclaration, getQualifiedLeftMeaning(meaning), useOnlyExternalAliasing, visitedSymbolTablesMap);
             }
             function isAccessible(symbolFromSymbolTable, resolvedAliasSymbol, ignoreQualification) {
                 return symbol === (resolvedAliasSymbol || symbolFromSymbolTable) &&
-                    // if the symbolFromSymbolTable is not external module (it could be if it was determined as ambient external module and would be in globals table)
-                    // and if symbolFromSymbolTable or alias resolution matches the symbol,
-                    // check the symbol can be qualified, it is only then this symbol is accessible
                     !ts.some(symbolFromSymbolTable.declarations, hasNonGlobalAugmentationExternalModuleSymbol) &&
                     (ignoreQualification || canQualifySymbol(symbolFromSymbolTable, meaning));
             }
             function trySymbolTable(symbols, ignoreQualification) {
-                // If symbol is directly available by its name in the symbol table
-                if (isAccessible(symbols.get(symbol.escapedName), /*resolvedAliasSymbol*/ undefined, ignoreQualification)) {
+                if (isAccessible(symbols.get(symbol.escapedName), undefined, ignoreQualification)) {
                     return [symbol];
                 }
-                // Check if symbol is any of the alias
                 return ts.forEachEntry(symbols, function (symbolFromSymbolTable) {
-                    if (symbolFromSymbolTable.flags & 2097152 /* Alias */
-                        && symbolFromSymbolTable.escapedName !== "export=" /* ExportEquals */
-                        && symbolFromSymbolTable.escapedName !== "default" /* Default */
+                    if (symbolFromSymbolTable.flags & 2097152
+                        && symbolFromSymbolTable.escapedName !== "export="
+                        && symbolFromSymbolTable.escapedName !== "default"
                         && !(ts.isUMDExportSymbol(symbolFromSymbolTable) && enclosingDeclaration && ts.isExternalModule(ts.getSourceFileOfNode(enclosingDeclaration)))
-                        // If `!useOnlyExternalAliasing`, we can use any type of alias to get the name
                         && (!useOnlyExternalAliasing || ts.some(symbolFromSymbolTable.declarations, ts.isExternalModuleImportEqualsDeclaration))) {
                         var resolvedImportedSymbol = resolveAlias(symbolFromSymbolTable);
                         if (isAccessible(symbolFromSymbolTable, resolvedImportedSymbol, ignoreQualification)) {
                             return [symbolFromSymbolTable];
                         }
-                        // Look in the exported members, if we can find accessibleSymbolChain, symbol is accessible using this chain
-                        // but only if the symbolFromSymbolTable can be qualified
                         var candidateTable = getExportsOfSymbol(resolvedImportedSymbol);
-                        var accessibleSymbolsFromExports = candidateTable && getAccessibleSymbolChainFromSymbolTable(candidateTable, /*ignoreQualification*/ true);
+                        var accessibleSymbolsFromExports = candidateTable && getAccessibleSymbolChainFromSymbolTable(candidateTable, true);
                         if (accessibleSymbolsFromExports && canQualifySymbol(symbolFromSymbolTable, getQualifiedLeftMeaning(meaning))) {
                             return [symbolFromSymbolTable].concat(accessibleSymbolsFromExports);
                         }
                     }
                     if (symbolFromSymbolTable.escapedName === symbol.escapedName && symbolFromSymbolTable.exportSymbol) {
-                        if (isAccessible(getMergedSymbol(symbolFromSymbolTable.exportSymbol), /*aliasSymbol*/ undefined, ignoreQualification)) {
+                        if (isAccessible(getMergedSymbol(symbolFromSymbolTable.exportSymbol), undefined, ignoreQualification)) {
                             return [symbol];
                         }
                     }
@@ -31473,24 +25663,18 @@ var ts;
         function needsQualification(symbol, enclosingDeclaration, meaning) {
             var qualify = false;
             forEachSymbolTableInScope(enclosingDeclaration, function (symbolTable) {
-                // If symbol of this name is not available in the symbol table we are ok
                 var symbolFromSymbolTable = getMergedSymbol(symbolTable.get(symbol.escapedName));
                 if (!symbolFromSymbolTable) {
-                    // Continue to the next symbol table
                     return false;
                 }
-                // If the symbol with this name is present it should refer to the symbol
                 if (symbolFromSymbolTable === symbol) {
-                    // No need to qualify
                     return true;
                 }
-                // Qualify if the symbol from symbol table has same meaning as expected
-                symbolFromSymbolTable = (symbolFromSymbolTable.flags & 2097152 /* Alias */ && !ts.getDeclarationOfKind(symbolFromSymbolTable, 252 /* ExportSpecifier */)) ? resolveAlias(symbolFromSymbolTable) : symbolFromSymbolTable;
+                symbolFromSymbolTable = (symbolFromSymbolTable.flags & 2097152 && !ts.getDeclarationOfKind(symbolFromSymbolTable, 252)) ? resolveAlias(symbolFromSymbolTable) : symbolFromSymbolTable;
                 if (symbolFromSymbolTable.flags & meaning) {
                     qualify = true;
                     return true;
                 }
-                // Continue to the next symbol table
                 return false;
             });
             return qualify;
@@ -31500,10 +25684,10 @@ var ts;
                 for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
                     var declaration = _a[_i];
                     switch (declaration.kind) {
-                        case 152 /* PropertyDeclaration */:
-                        case 154 /* MethodDeclaration */:
-                        case 156 /* GetAccessor */:
-                        case 157 /* SetAccessor */:
+                        case 152:
+                        case 154:
+                        case 156:
+                        case 157:
                             continue;
                         default:
                             return false;
@@ -31514,129 +25698,97 @@ var ts;
             return false;
         }
         function isTypeSymbolAccessible(typeSymbol, enclosingDeclaration) {
-            var access = isSymbolAccessible(typeSymbol, enclosingDeclaration, 67901928 /* Type */, /*shouldComputeAliasesToMakeVisible*/ false);
-            return access.accessibility === 0 /* Accessible */;
+            var access = isSymbolAccessible(typeSymbol, enclosingDeclaration, 67901928, false);
+            return access.accessibility === 0;
         }
         function isValueSymbolAccessible(typeSymbol, enclosingDeclaration) {
-            var access = isSymbolAccessible(typeSymbol, enclosingDeclaration, 67216319 /* Value */, /*shouldComputeAliasesToMakeVisible*/ false);
-            return access.accessibility === 0 /* Accessible */;
-        }
-        /**
-         * Check if the given symbol in given enclosing declaration is accessible and mark all associated alias to be visible if requested
-         *
-         * @param symbol a Symbol to check if accessible
-         * @param enclosingDeclaration a Node containing reference to the symbol
-         * @param meaning a SymbolFlags to check if such meaning of the symbol is accessible
-         * @param shouldComputeAliasToMakeVisible a boolean value to indicate whether to return aliases to be mark visible in case the symbol is accessible
-         */
+            var access = isSymbolAccessible(typeSymbol, enclosingDeclaration, 67216319, false);
+            return access.accessibility === 0;
+        }
         function isSymbolAccessible(symbol, enclosingDeclaration, meaning, shouldComputeAliasesToMakeVisible) {
             if (symbol && enclosingDeclaration) {
                 var initialSymbol = symbol;
                 var meaningToLook = meaning;
                 while (symbol) {
-                    // Symbol is accessible if it by itself is accessible
-                    var accessibleSymbolChain = getAccessibleSymbolChain(symbol, enclosingDeclaration, meaningToLook, /*useOnlyExternalAliasing*/ false);
+                    var accessibleSymbolChain = getAccessibleSymbolChain(symbol, enclosingDeclaration, meaningToLook, false);
                     if (accessibleSymbolChain) {
                         var hasAccessibleDeclarations = hasVisibleDeclarations(accessibleSymbolChain[0], shouldComputeAliasesToMakeVisible);
                         if (!hasAccessibleDeclarations) {
                             return {
-                                accessibility: 1 /* NotAccessible */,
+                                accessibility: 1,
                                 errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning),
-                                errorModuleName: symbol !== initialSymbol ? symbolToString(symbol, enclosingDeclaration, 1920 /* Namespace */) : undefined,
+                                errorModuleName: symbol !== initialSymbol ? symbolToString(symbol, enclosingDeclaration, 1920) : undefined,
                             };
                         }
                         return hasAccessibleDeclarations;
                     }
                     else {
                         if (ts.some(symbol.declarations, hasNonGlobalAugmentationExternalModuleSymbol)) {
-                            // Any meaning of a module symbol is always accessible via an `import` type
                             return {
-                                accessibility: 0 /* Accessible */
+                                accessibility: 0
                             };
                         }
                     }
-                    // If we haven't got the accessible symbol, it doesn't mean the symbol is actually inaccessible.
-                    // It could be a qualified symbol and hence verify the path
-                    // e.g.:
-                    // module m {
-                    //     export class c {
-                    //     }
-                    // }
-                    // const x: typeof m.c
-                    // In the above example when we start with checking if typeof m.c symbol is accessible,
-                    // we are going to see if c can be accessed in scope directly.
-                    // But it can't, hence the accessible is going to be undefined, but that doesn't mean m.c is inaccessible
-                    // It is accessible if the parent m is accessible because then m.c can be accessed through qualification
                     meaningToLook = getQualifiedLeftMeaning(meaning);
                     symbol = getContainerOfSymbol(symbol);
                 }
-                // This could be a symbol that is not exported in the external module
-                // or it could be a symbol from different external module that is not aliased and hence cannot be named
                 var symbolExternalModule = ts.forEach(initialSymbol.declarations, getExternalModuleContainer);
                 if (symbolExternalModule) {
                     var enclosingExternalModule = getExternalModuleContainer(enclosingDeclaration);
                     if (symbolExternalModule !== enclosingExternalModule) {
-                        // name from different external module that is not visible
                         return {
-                            accessibility: 2 /* CannotBeNamed */,
+                            accessibility: 2,
                             errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning),
                             errorModuleName: symbolToString(symbolExternalModule)
                         };
                     }
                 }
-                // Just a local name that is not accessible
                 return {
-                    accessibility: 1 /* NotAccessible */,
+                    accessibility: 1,
                     errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning),
                 };
             }
-            return { accessibility: 0 /* Accessible */ };
+            return { accessibility: 0 };
             function getExternalModuleContainer(declaration) {
                 var node = ts.findAncestor(declaration, hasExternalModuleSymbol);
                 return node && getSymbolOfNode(node);
             }
         }
         function hasExternalModuleSymbol(declaration) {
-            return ts.isAmbientModule(declaration) || (declaration.kind === 274 /* SourceFile */ && ts.isExternalOrCommonJsModule(declaration));
+            return ts.isAmbientModule(declaration) || (declaration.kind === 274 && ts.isExternalOrCommonJsModule(declaration));
         }
         function hasNonGlobalAugmentationExternalModuleSymbol(declaration) {
-            return ts.isModuleWithStringLiteralName(declaration) || (declaration.kind === 274 /* SourceFile */ && ts.isExternalOrCommonJsModule(declaration));
+            return ts.isModuleWithStringLiteralName(declaration) || (declaration.kind === 274 && ts.isExternalOrCommonJsModule(declaration));
         }
         function hasVisibleDeclarations(symbol, shouldComputeAliasToMakeVisible) {
             var aliasesToMakeVisible;
             if (!ts.every(symbol.declarations, getIsDeclarationVisible)) {
                 return undefined;
             }
-            return { accessibility: 0 /* Accessible */, aliasesToMakeVisible: aliasesToMakeVisible };
+            return { accessibility: 0, aliasesToMakeVisible: aliasesToMakeVisible };
             function getIsDeclarationVisible(declaration) {
                 if (!isDeclarationVisible(declaration)) {
-                    // Mark the unexported alias as visible if its parent is visible
-                    // because these kind of aliases can be used to name types in declaration file
                     var anyImportSyntax = getAnyImportSyntax(declaration);
                     if (anyImportSyntax &&
-                        !ts.hasModifier(anyImportSyntax, 1 /* Export */) && // import clause without export
+                        !ts.hasModifier(anyImportSyntax, 1) &&
                         isDeclarationVisible(anyImportSyntax.parent)) {
                         return addVisibleAlias(declaration, anyImportSyntax);
                     }
                     else if (ts.isVariableDeclaration(declaration) && ts.isVariableStatement(declaration.parent.parent) &&
-                        !ts.hasModifier(declaration.parent.parent, 1 /* Export */) && // unexported variable statement
+                        !ts.hasModifier(declaration.parent.parent, 1) &&
                         isDeclarationVisible(declaration.parent.parent.parent)) {
                         return addVisibleAlias(declaration, declaration.parent.parent);
                     }
-                    else if (ts.isLateVisibilityPaintedStatement(declaration) // unexported top-level statement
-                        && !ts.hasModifier(declaration, 1 /* Export */)
+                    else if (ts.isLateVisibilityPaintedStatement(declaration)
+                        && !ts.hasModifier(declaration, 1)
                         && isDeclarationVisible(declaration.parent)) {
                         return addVisibleAlias(declaration, declaration);
                     }
-                    // Declaration is not visible
                     return false;
                 }
                 return true;
             }
             function addVisibleAlias(declaration, aliasingStatement) {
-                // In function "buildTypeDisplay" where we decide whether to write type-alias or serialize types,
-                // we want to just check if type- alias is accessible or not but we don't care about emitting those alias at that time
-                // since we will do the emitting later in trackSymbol.
                 if (shouldComputeAliasToMakeVisible) {
                     getNodeLinks(declaration).isVisible = true;
                     aliasesToMakeVisible = ts.appendIfUnique(aliasesToMakeVisible, aliasingStatement);
@@ -31645,147 +25797,141 @@ var ts;
             }
         }
         function isEntityNameVisible(entityName, enclosingDeclaration) {
-            // get symbol of the first identifier of the entityName
             var meaning;
-            if (entityName.parent.kind === 165 /* TypeQuery */ ||
+            if (entityName.parent.kind === 165 ||
                 ts.isExpressionWithTypeArgumentsInClassExtendsClause(entityName.parent) ||
-                entityName.parent.kind === 147 /* ComputedPropertyName */) {
-                // Typeof value
-                meaning = 67216319 /* Value */ | 1048576 /* ExportValue */;
+                entityName.parent.kind === 147) {
+                meaning = 67216319 | 1048576;
             }
-            else if (entityName.kind === 146 /* QualifiedName */ || entityName.kind === 185 /* PropertyAccessExpression */ ||
-                entityName.parent.kind === 243 /* ImportEqualsDeclaration */) {
-                // Left identifier from type reference or TypeAlias
-                // Entity name of the import declaration
-                meaning = 1920 /* Namespace */;
+            else if (entityName.kind === 146 || entityName.kind === 185 ||
+                entityName.parent.kind === 243) {
+                meaning = 1920;
             }
             else {
-                // Type Reference or TypeAlias entity = Identifier
-                meaning = 67901928 /* Type */;
+                meaning = 67901928;
             }
             var firstIdentifier = getFirstIdentifier(entityName);
-            var symbol = resolveName(enclosingDeclaration, firstIdentifier.escapedText, meaning, /*nodeNotFoundErrorMessage*/ undefined, /*nameArg*/ undefined, /*isUse*/ false);
-            // Verify if the symbol is accessible
-            return (symbol && hasVisibleDeclarations(symbol, /*shouldComputeAliasToMakeVisible*/ true)) || {
-                accessibility: 1 /* NotAccessible */,
+            var symbol = resolveName(enclosingDeclaration, firstIdentifier.escapedText, meaning, undefined, undefined, false);
+            return (symbol && hasVisibleDeclarations(symbol, true)) || {
+                accessibility: 1,
                 errorSymbolName: ts.getTextOfNode(firstIdentifier),
                 errorNode: firstIdentifier
             };
         }
         function symbolToString(symbol, enclosingDeclaration, meaning, flags, writer) {
-            if (flags === void 0) { flags = 4 /* AllowAnyNodeKind */; }
-            var nodeFlags = 3112960 /* IgnoreErrors */;
-            if (flags & 2 /* UseOnlyExternalAliasing */) {
-                nodeFlags |= 128 /* UseOnlyExternalAliasing */;
+            if (flags === void 0) { flags = 4; }
+            var nodeFlags = 3112960;
+            if (flags & 2) {
+                nodeFlags |= 128;
             }
-            if (flags & 1 /* WriteTypeParametersOrArguments */) {
-                nodeFlags |= 512 /* WriteTypeParametersInQualifiedName */;
+            if (flags & 1) {
+                nodeFlags |= 512;
             }
-            if (flags & 8 /* UseAliasDefinedOutsideCurrentScope */) {
-                nodeFlags |= 16384 /* UseAliasDefinedOutsideCurrentScope */;
+            if (flags & 8) {
+                nodeFlags |= 16384;
             }
-            var builder = flags & 4 /* AllowAnyNodeKind */ ? nodeBuilder.symbolToExpression : nodeBuilder.symbolToEntityName;
+            var builder = flags & 4 ? nodeBuilder.symbolToExpression : nodeBuilder.symbolToEntityName;
             return writer ? symbolToStringWorker(writer).getText() : ts.usingSingleLineStringWriter(symbolToStringWorker);
             function symbolToStringWorker(writer) {
-                var entity = builder(symbol, meaning, enclosingDeclaration, nodeFlags); // TODO: GH#18217
+                var entity = builder(symbol, meaning, enclosingDeclaration, nodeFlags);
                 var printer = ts.createPrinter({ removeComments: true });
                 var sourceFile = enclosingDeclaration && ts.getSourceFileOfNode(enclosingDeclaration);
-                printer.writeNode(4 /* Unspecified */, entity, /*sourceFile*/ sourceFile, writer);
+                printer.writeNode(4, entity, sourceFile, writer);
                 return writer;
             }
         }
         function signatureToString(signature, enclosingDeclaration, flags, kind, writer) {
-            if (flags === void 0) { flags = 0 /* None */; }
+            if (flags === void 0) { flags = 0; }
             return writer ? signatureToStringWorker(writer).getText() : ts.usingSingleLineStringWriter(signatureToStringWorker);
             function signatureToStringWorker(writer) {
                 var sigOutput;
-                if (flags & 262144 /* WriteArrowStyleSignature */) {
-                    sigOutput = kind === 1 /* Construct */ ? 164 /* ConstructorType */ : 163 /* FunctionType */;
+                if (flags & 262144) {
+                    sigOutput = kind === 1 ? 164 : 163;
                 }
                 else {
-                    sigOutput = kind === 1 /* Construct */ ? 159 /* ConstructSignature */ : 158 /* CallSignature */;
+                    sigOutput = kind === 1 ? 159 : 158;
                 }
-                var sig = nodeBuilder.signatureToSignatureDeclaration(signature, sigOutput, enclosingDeclaration, toNodeBuilderFlags(flags) | 3112960 /* IgnoreErrors */ | 512 /* WriteTypeParametersInQualifiedName */);
+                var sig = nodeBuilder.signatureToSignatureDeclaration(signature, sigOutput, enclosingDeclaration, toNodeBuilderFlags(flags) | 3112960 | 512);
                 var printer = ts.createPrinter({ removeComments: true, omitTrailingSemicolon: true });
                 var sourceFile = enclosingDeclaration && ts.getSourceFileOfNode(enclosingDeclaration);
-                printer.writeNode(4 /* Unspecified */, sig, /*sourceFile*/ sourceFile, writer); // TODO: GH#18217
+                printer.writeNode(4, sig, sourceFile, writer);
                 return writer;
             }
         }
         function typeToString(type, enclosingDeclaration, flags, writer) {
-            if (flags === void 0) { flags = 1048576 /* AllowUniqueESSymbolType */ | 16384 /* UseAliasDefinedOutsideCurrentScope */; }
+            if (flags === void 0) { flags = 1048576 | 16384; }
             if (writer === void 0) { writer = ts.createTextWriter(""); }
-            var typeNode = nodeBuilder.typeToTypeNode(type, enclosingDeclaration, toNodeBuilderFlags(flags) | 3112960 /* IgnoreErrors */, writer);
+            var typeNode = nodeBuilder.typeToTypeNode(type, enclosingDeclaration, toNodeBuilderFlags(flags) | 3112960, writer);
             if (typeNode === undefined)
                 return ts.Debug.fail("should always get typenode");
             var options = { removeComments: true };
             var printer = ts.createPrinter(options);
             var sourceFile = enclosingDeclaration && ts.getSourceFileOfNode(enclosingDeclaration);
-            printer.writeNode(4 /* Unspecified */, typeNode, /*sourceFile*/ sourceFile, writer);
+            printer.writeNode(4, typeNode, sourceFile, writer);
             var result = writer.getText();
-            var maxLength = compilerOptions.noErrorTruncation || flags & 1 /* NoTruncation */ ? undefined : 100;
+            var maxLength = compilerOptions.noErrorTruncation || flags & 1 ? undefined : 100;
             if (maxLength && result && result.length >= maxLength) {
                 return result.substr(0, maxLength - "...".length) + "...";
             }
             return result;
         }
         function toNodeBuilderFlags(flags) {
-            if (flags === void 0) { flags = 0 /* None */; }
-            return flags & 9469291 /* NodeBuilderFlagsMask */;
+            if (flags === void 0) { flags = 0; }
+            return flags & 9469291;
         }
         function createNodeBuilder() {
             return {
                 typeToTypeNode: function (type, enclosingDeclaration, flags, tracker) {
-                    ts.Debug.assert(enclosingDeclaration === undefined || (enclosingDeclaration.flags & 8 /* Synthesized */) === 0);
+                    ts.Debug.assert(enclosingDeclaration === undefined || (enclosingDeclaration.flags & 8) === 0);
                     var context = createNodeBuilderContext(enclosingDeclaration, flags, tracker);
                     var resultingNode = typeToTypeNodeHelper(type, context);
                     var result = context.encounteredError ? undefined : resultingNode;
                     return result;
                 },
                 indexInfoToIndexSignatureDeclaration: function (indexInfo, kind, enclosingDeclaration, flags, tracker) {
-                    ts.Debug.assert(enclosingDeclaration === undefined || (enclosingDeclaration.flags & 8 /* Synthesized */) === 0);
+                    ts.Debug.assert(enclosingDeclaration === undefined || (enclosingDeclaration.flags & 8) === 0);
                     var context = createNodeBuilderContext(enclosingDeclaration, flags, tracker);
                     var resultingNode = indexInfoToIndexSignatureDeclarationHelper(indexInfo, kind, context);
                     var result = context.encounteredError ? undefined : resultingNode;
-                    return result; // TODO: GH#18217
+                    return result;
                 },
                 signatureToSignatureDeclaration: function (signature, kind, enclosingDeclaration, flags, tracker) {
-                    ts.Debug.assert(enclosingDeclaration === undefined || (enclosingDeclaration.flags & 8 /* Synthesized */) === 0);
+                    ts.Debug.assert(enclosingDeclaration === undefined || (enclosingDeclaration.flags & 8) === 0);
                     var context = createNodeBuilderContext(enclosingDeclaration, flags, tracker);
                     var resultingNode = signatureToSignatureDeclarationHelper(signature, kind, context);
                     var result = context.encounteredError ? undefined : resultingNode;
                     return result;
                 },
                 symbolToEntityName: function (symbol, meaning, enclosingDeclaration, flags, tracker) {
-                    ts.Debug.assert(enclosingDeclaration === undefined || (enclosingDeclaration.flags & 8 /* Synthesized */) === 0);
+                    ts.Debug.assert(enclosingDeclaration === undefined || (enclosingDeclaration.flags & 8) === 0);
                     var context = createNodeBuilderContext(enclosingDeclaration, flags, tracker);
-                    var resultingNode = symbolToName(symbol, context, meaning, /*expectsIdentifier*/ false);
+                    var resultingNode = symbolToName(symbol, context, meaning, false);
                     var result = context.encounteredError ? undefined : resultingNode;
                     return result;
                 },
                 symbolToExpression: function (symbol, meaning, enclosingDeclaration, flags, tracker) {
-                    ts.Debug.assert(enclosingDeclaration === undefined || (enclosingDeclaration.flags & 8 /* Synthesized */) === 0);
+                    ts.Debug.assert(enclosingDeclaration === undefined || (enclosingDeclaration.flags & 8) === 0);
                     var context = createNodeBuilderContext(enclosingDeclaration, flags, tracker);
                     var resultingNode = symbolToExpression(symbol, context, meaning);
                     var result = context.encounteredError ? undefined : resultingNode;
                     return result;
                 },
                 symbolToTypeParameterDeclarations: function (symbol, enclosingDeclaration, flags, tracker) {
-                    ts.Debug.assert(enclosingDeclaration === undefined || (enclosingDeclaration.flags & 8 /* Synthesized */) === 0);
+                    ts.Debug.assert(enclosingDeclaration === undefined || (enclosingDeclaration.flags & 8) === 0);
                     var context = createNodeBuilderContext(enclosingDeclaration, flags, tracker);
                     var resultingNode = typeParametersToTypeParameterDeclarations(symbol, context);
                     var result = context.encounteredError ? undefined : resultingNode;
                     return result;
                 },
                 symbolToParameterDeclaration: function (symbol, enclosingDeclaration, flags, tracker) {
-                    ts.Debug.assert(enclosingDeclaration === undefined || (enclosingDeclaration.flags & 8 /* Synthesized */) === 0);
+                    ts.Debug.assert(enclosingDeclaration === undefined || (enclosingDeclaration.flags & 8) === 0);
                     var context = createNodeBuilderContext(enclosingDeclaration, flags, tracker);
                     var resultingNode = symbolToParameterDeclaration(symbol, context);
                     var result = context.encounteredError ? undefined : resultingNode;
                     return result;
                 },
                 typeParameterToDeclaration: function (parameter, enclosingDeclaration, flags, tracker) {
-                    ts.Debug.assert(enclosingDeclaration === undefined || (enclosingDeclaration.flags & 8 /* Synthesized */) === 0);
+                    ts.Debug.assert(enclosingDeclaration === undefined || (enclosingDeclaration.flags & 8) === 0);
                     var context = createNodeBuilderContext(enclosingDeclaration, flags, tracker);
                     var resultingNode = typeParameterToDeclaration(parameter, context);
                     var result = context.encounteredError ? undefined : resultingNode;
@@ -31795,7 +25941,7 @@ var ts;
             function createNodeBuilderContext(enclosingDeclaration, flags, tracker) {
                 return {
                     enclosingDeclaration: enclosingDeclaration,
-                    flags: flags || 0 /* None */,
+                    flags: flags || 0,
                     tracker: tracker && tracker.trackSymbol ? tracker : { trackSymbol: ts.noop },
                     encounteredError: false,
                     visitedSymbols: undefined,
@@ -31806,78 +25952,78 @@ var ts;
                 if (cancellationToken && cancellationToken.throwIfCancellationRequested) {
                     cancellationToken.throwIfCancellationRequested();
                 }
-                var inTypeAlias = context.flags & 8388608 /* InTypeAlias */;
-                context.flags &= ~8388608 /* InTypeAlias */;
+                var inTypeAlias = context.flags & 8388608;
+                context.flags &= ~8388608;
                 if (!type) {
                     context.encounteredError = true;
-                    return undefined; // TODO: GH#18217
+                    return undefined;
                 }
-                if (type.flags & 1 /* Any */) {
-                    return ts.createKeywordTypeNode(119 /* AnyKeyword */);
+                if (type.flags & 1) {
+                    return ts.createKeywordTypeNode(119);
                 }
-                if (type.flags & 2 /* Unknown */) {
-                    return ts.createKeywordTypeNode(142 /* UnknownKeyword */);
+                if (type.flags & 2) {
+                    return ts.createKeywordTypeNode(142);
                 }
-                if (type.flags & 4 /* String */) {
-                    return ts.createKeywordTypeNode(137 /* StringKeyword */);
+                if (type.flags & 4) {
+                    return ts.createKeywordTypeNode(137);
                 }
-                if (type.flags & 8 /* Number */) {
-                    return ts.createKeywordTypeNode(134 /* NumberKeyword */);
+                if (type.flags & 8) {
+                    return ts.createKeywordTypeNode(134);
                 }
-                if (type.flags & 16 /* Boolean */) {
-                    return ts.createKeywordTypeNode(122 /* BooleanKeyword */);
+                if (type.flags & 16) {
+                    return ts.createKeywordTypeNode(122);
                 }
-                if (type.flags & 512 /* EnumLiteral */ && !(type.flags & 262144 /* Union */)) {
+                if (type.flags & 512 && !(type.flags & 262144)) {
                     var parentSymbol = getParentOfSymbol(type.symbol);
-                    var parentName = symbolToName(parentSymbol, context, 67901928 /* Type */, /*expectsIdentifier*/ false);
+                    var parentName = symbolToName(parentSymbol, context, 67901928, false);
                     var enumLiteralName = getDeclaredTypeOfSymbol(parentSymbol) === type ? parentName : ts.createQualifiedName(parentName, ts.symbolName(type.symbol));
-                    return ts.createTypeReferenceNode(enumLiteralName, /*typeArguments*/ undefined);
+                    return ts.createTypeReferenceNode(enumLiteralName, undefined);
                 }
-                if (type.flags & 544 /* EnumLike */) {
-                    var name = symbolToName(type.symbol, context, 67901928 /* Type */, /*expectsIdentifier*/ false);
-                    return ts.createTypeReferenceNode(name, /*typeArguments*/ undefined);
+                if (type.flags & 544) {
+                    var name = symbolToName(type.symbol, context, 67901928, false);
+                    return ts.createTypeReferenceNode(name, undefined);
                 }
-                if (type.flags & (64 /* StringLiteral */)) {
-                    return ts.createLiteralTypeNode(ts.setEmitFlags(ts.createLiteral(type.value), 16777216 /* NoAsciiEscaping */));
+                if (type.flags & (64)) {
+                    return ts.createLiteralTypeNode(ts.setEmitFlags(ts.createLiteral(type.value), 16777216));
                 }
-                if (type.flags & (128 /* NumberLiteral */)) {
+                if (type.flags & (128)) {
                     return ts.createLiteralTypeNode((ts.createLiteral(type.value)));
                 }
-                if (type.flags & 256 /* BooleanLiteral */) {
+                if (type.flags & 256) {
                     return type.intrinsicName === "true" ? ts.createTrue() : ts.createFalse();
                 }
-                if (type.flags & 2048 /* UniqueESSymbol */) {
-                    if (!(context.flags & 1048576 /* AllowUniqueESSymbolType */)) {
+                if (type.flags & 2048) {
+                    if (!(context.flags & 1048576)) {
                         if (isValueSymbolAccessible(type.symbol, context.enclosingDeclaration)) {
-                            return symbolToTypeNode(type.symbol, context, 67216319 /* Value */);
+                            return symbolToTypeNode(type.symbol, context, 67216319);
                         }
                         if (context.tracker.reportInaccessibleUniqueSymbolError) {
                             context.tracker.reportInaccessibleUniqueSymbolError();
                         }
                     }
-                    return ts.createTypeOperatorNode(141 /* UniqueKeyword */, ts.createKeywordTypeNode(138 /* SymbolKeyword */));
+                    return ts.createTypeOperatorNode(141, ts.createKeywordTypeNode(138));
                 }
-                if (type.flags & 4096 /* Void */) {
-                    return ts.createKeywordTypeNode(105 /* VoidKeyword */);
+                if (type.flags & 4096) {
+                    return ts.createKeywordTypeNode(105);
                 }
-                if (type.flags & 8192 /* Undefined */) {
-                    return ts.createKeywordTypeNode(140 /* UndefinedKeyword */);
+                if (type.flags & 8192) {
+                    return ts.createKeywordTypeNode(140);
                 }
-                if (type.flags & 16384 /* Null */) {
-                    return ts.createKeywordTypeNode(95 /* NullKeyword */);
+                if (type.flags & 16384) {
+                    return ts.createKeywordTypeNode(95);
                 }
-                if (type.flags & 32768 /* Never */) {
-                    return ts.createKeywordTypeNode(131 /* NeverKeyword */);
+                if (type.flags & 32768) {
+                    return ts.createKeywordTypeNode(131);
                 }
-                if (type.flags & 1024 /* ESSymbol */) {
-                    return ts.createKeywordTypeNode(138 /* SymbolKeyword */);
+                if (type.flags & 1024) {
+                    return ts.createKeywordTypeNode(138);
                 }
-                if (type.flags & 16777216 /* NonPrimitive */) {
-                    return ts.createKeywordTypeNode(135 /* ObjectKeyword */);
+                if (type.flags & 16777216) {
+                    return ts.createKeywordTypeNode(135);
                 }
-                if (type.flags & 65536 /* TypeParameter */ && type.isThisType) {
-                    if (context.flags & 4194304 /* InObjectTypeLiteral */) {
-                        if (!context.encounteredError && !(context.flags & 32768 /* AllowThisInObjectLiteral */)) {
+                if (type.flags & 65536 && type.isThisType) {
+                    if (context.flags & 4194304) {
+                        if (!context.encounteredError && !(context.flags & 32768)) {
                             context.encounteredError = true;
                         }
                         if (context.tracker.reportInaccessibleThisError) {
@@ -31887,63 +26033,61 @@ var ts;
                     return ts.createThis();
                 }
                 var objectFlags = ts.getObjectFlags(type);
-                if (objectFlags & 4 /* Reference */) {
-                    ts.Debug.assert(!!(type.flags & 131072 /* Object */));
+                if (objectFlags & 4) {
+                    ts.Debug.assert(!!(type.flags & 131072));
                     return typeReferenceToTypeNode(type);
                 }
-                if (type.flags & 65536 /* TypeParameter */ || objectFlags & 3 /* ClassOrInterface */) {
-                    if (type.flags & 65536 /* TypeParameter */ && ts.contains(context.inferTypeParameters, type)) {
-                        return ts.createInferTypeNode(typeParameterToDeclarationWithConstraint(type, context, /*constraintNode*/ undefined));
+                if (type.flags & 65536 || objectFlags & 3) {
+                    if (type.flags & 65536 && ts.contains(context.inferTypeParameters, type)) {
+                        return ts.createInferTypeNode(typeParameterToDeclarationWithConstraint(type, context, undefined));
                     }
-                    if (context.flags & 4 /* GenerateNamesForShadowedTypeParams */ &&
-                        type.flags & 65536 /* TypeParameter */ &&
+                    if (context.flags & 4 &&
+                        type.flags & 65536 &&
                         ts.length(type.symbol.declarations) &&
                         ts.isTypeParameterDeclaration(type.symbol.declarations[0]) &&
                         typeParameterShadowsNameInScope(type, context) &&
                         !isTypeSymbolAccessible(type.symbol, context.enclosingDeclaration)) {
-                        return ts.createTypeReferenceNode(ts.getGeneratedNameForNode(type.symbol.declarations[0].name, 16 /* Optimistic */ | 8 /* ReservedInNestedScopes */), /*typeArguments*/ undefined);
+                        return ts.createTypeReferenceNode(ts.getGeneratedNameForNode(type.symbol.declarations[0].name, 16 | 8), undefined);
                     }
-                    // Ignore constraint/default when creating a usage (as opposed to declaration) of a type parameter.
                     return type.symbol
-                        ? symbolToTypeNode(type.symbol, context, 67901928 /* Type */)
-                        : ts.createTypeReferenceNode(ts.createIdentifier("?"), /*typeArguments*/ undefined);
+                        ? symbolToTypeNode(type.symbol, context, 67901928)
+                        : ts.createTypeReferenceNode(ts.createIdentifier("?"), undefined);
                 }
-                if (!inTypeAlias && type.aliasSymbol && (context.flags & 16384 /* UseAliasDefinedOutsideCurrentScope */ || isTypeSymbolAccessible(type.aliasSymbol, context.enclosingDeclaration))) {
+                if (!inTypeAlias && type.aliasSymbol && (context.flags & 16384 || isTypeSymbolAccessible(type.aliasSymbol, context.enclosingDeclaration))) {
                     var typeArgumentNodes = mapToTypeNodes(type.aliasTypeArguments, context);
-                    if (isReservedMemberName(type.aliasSymbol.escapedName) && !(type.aliasSymbol.flags & 32 /* Class */))
+                    if (isReservedMemberName(type.aliasSymbol.escapedName) && !(type.aliasSymbol.flags & 32))
                         return ts.createTypeReferenceNode(ts.createIdentifier(""), typeArgumentNodes);
-                    return symbolToTypeNode(type.aliasSymbol, context, 67901928 /* Type */, typeArgumentNodes);
+                    return symbolToTypeNode(type.aliasSymbol, context, 67901928, typeArgumentNodes);
                 }
-                if (type.flags & (262144 /* Union */ | 524288 /* Intersection */)) {
-                    var types = type.flags & 262144 /* Union */ ? formatUnionTypes(type.types) : type.types;
+                if (type.flags & (262144 | 524288)) {
+                    var types = type.flags & 262144 ? formatUnionTypes(type.types) : type.types;
                     var typeNodes = mapToTypeNodes(types, context);
                     if (typeNodes && typeNodes.length > 0) {
-                        var unionOrIntersectionTypeNode = ts.createUnionOrIntersectionTypeNode(type.flags & 262144 /* Union */ ? 169 /* UnionType */ : 170 /* IntersectionType */, typeNodes);
+                        var unionOrIntersectionTypeNode = ts.createUnionOrIntersectionTypeNode(type.flags & 262144 ? 169 : 170, typeNodes);
                         return unionOrIntersectionTypeNode;
                     }
                     else {
-                        if (!context.encounteredError && !(context.flags & 262144 /* AllowEmptyUnionOrIntersection */)) {
+                        if (!context.encounteredError && !(context.flags & 262144)) {
                             context.encounteredError = true;
                         }
-                        return undefined; // TODO: GH#18217
+                        return undefined;
                     }
                 }
-                if (objectFlags & (16 /* Anonymous */ | 32 /* Mapped */)) {
-                    ts.Debug.assert(!!(type.flags & 131072 /* Object */));
-                    // The type is an object literal type.
+                if (objectFlags & (16 | 32)) {
+                    ts.Debug.assert(!!(type.flags & 131072));
                     return createAnonymousTypeNode(type);
                 }
-                if (type.flags & 1048576 /* Index */) {
+                if (type.flags & 1048576) {
                     var indexedType = type.type;
                     var indexTypeNode = typeToTypeNodeHelper(indexedType, context);
                     return ts.createTypeOperatorNode(indexTypeNode);
                 }
-                if (type.flags & 2097152 /* IndexedAccess */) {
+                if (type.flags & 2097152) {
                     var objectTypeNode = typeToTypeNodeHelper(type.objectType, context);
                     var indexTypeNode = typeToTypeNodeHelper(type.indexType, context);
                     return ts.createIndexedAccessTypeNode(objectTypeNode, indexTypeNode);
                 }
-                if (type.flags & 4194304 /* Conditional */) {
+                if (type.flags & 4194304) {
                     var checkTypeNode = typeToTypeNodeHelper(type.checkType, context);
                     var saveInferTypeParameters = context.inferTypeParameters;
                     context.inferTypeParameters = type.root.inferTypeParameters;
@@ -31953,18 +26097,16 @@ var ts;
                     var falseTypeNode = typeToTypeNodeHelper(getFalseTypeFromConditionalType(type), context);
                     return ts.createConditionalTypeNode(checkTypeNode, extendsTypeNode, trueTypeNode, falseTypeNode);
                 }
-                if (type.flags & 8388608 /* Substitution */) {
+                if (type.flags & 8388608) {
                     return typeToTypeNodeHelper(type.typeVariable, context);
                 }
                 return ts.Debug.fail("Should be unreachable.");
                 function createMappedTypeNodeFromType(type) {
-                    ts.Debug.assert(!!(type.flags & 131072 /* Object */));
+                    ts.Debug.assert(!!(type.flags & 131072));
                     var readonlyToken = type.declaration.readonlyToken ? ts.createToken(type.declaration.readonlyToken.kind) : undefined;
                     var questionToken = type.declaration.questionToken ? ts.createToken(type.declaration.questionToken.kind) : undefined;
                     var appropriateConstraintTypeNode;
                     if (isMappedTypeWithKeyofConstraintDeclaration(type)) {
-                        // We have a { [P in keyof T]: X }
-                        // We do this to ensure we retain the toplevel keyof-ness of the type which may be lost due to keyof distribution during `getConstraintTypeFromMappedType`
                         appropriateConstraintTypeNode = ts.createTypeOperatorNode(typeToTypeNodeHelper(getModifiersTypeFromMappedType(type), context));
                     }
                     else {
@@ -31973,39 +26115,33 @@ var ts;
                     var typeParameterNode = typeParameterToDeclarationWithConstraint(getTypeParameterFromMappedType(type), context, appropriateConstraintTypeNode);
                     var templateTypeNode = typeToTypeNodeHelper(getTemplateTypeFromMappedType(type), context);
                     var mappedTypeNode = ts.createMappedTypeNode(readonlyToken, typeParameterNode, questionToken, templateTypeNode);
-                    return ts.setEmitFlags(mappedTypeNode, 1 /* SingleLine */);
+                    return ts.setEmitFlags(mappedTypeNode, 1);
                 }
                 function createAnonymousTypeNode(type) {
                     var symbol = type.symbol;
                     var id;
                     if (symbol) {
-                        var isConstructorObject = ts.getObjectFlags(type) & 16 /* Anonymous */ && type.symbol && type.symbol.flags & 32 /* Class */;
+                        var isConstructorObject = ts.getObjectFlags(type) & 16 && type.symbol && type.symbol.flags & 32;
                         id = (isConstructorObject ? "+" : "") + getSymbolId(symbol);
                         if (isJavaScriptConstructor(symbol.valueDeclaration)) {
-                            // Instance and static types share the same symbol; only add 'typeof' for the static side.
-                            var isInstanceType = type === getInferredClassType(symbol) ? 67901928 /* Type */ : 67216319 /* Value */;
+                            var isInstanceType = type === getInferredClassType(symbol) ? 67901928 : 67216319;
                             return symbolToTypeNode(symbol, context, isInstanceType);
                         }
-                        // Always use 'typeof T' for type of class, enum, and module objects
-                        else if (symbol.flags & 32 /* Class */ && !getBaseTypeVariableOfClass(symbol) && !(symbol.valueDeclaration.kind === 205 /* ClassExpression */ && context.flags & 2048 /* WriteClassExpressionAsTypeLiteral */) ||
-                            symbol.flags & (384 /* Enum */ | 512 /* ValueModule */) ||
+                        else if (symbol.flags & 32 && !getBaseTypeVariableOfClass(symbol) && !(symbol.valueDeclaration.kind === 205 && context.flags & 2048) ||
+                            symbol.flags & (384 | 512) ||
                             shouldWriteTypeOfFunctionSymbol()) {
-                            return symbolToTypeNode(symbol, context, 67216319 /* Value */);
+                            return symbolToTypeNode(symbol, context, 67216319);
                         }
                         else if (context.visitedSymbols && context.visitedSymbols.has(id)) {
-                            // If type is an anonymous type literal in a type alias declaration, use type alias name
                             var typeAlias = getTypeAliasForTypeLiteral(type);
                             if (typeAlias) {
-                                // The specified symbol flags need to be reinterpreted as type flags
-                                return symbolToTypeNode(typeAlias, context, 67901928 /* Type */);
+                                return symbolToTypeNode(typeAlias, context, 67901928);
                             }
                             else {
-                                return ts.createKeywordTypeNode(119 /* AnyKeyword */);
+                                return ts.createKeywordTypeNode(119);
                             }
                         }
                         else {
-                            // Since instantiations of the same anonymous type have the same symbol, tracking symbols instead
-                            // of types allows us to catch circular references to instantiations of the same anonymous type
                             if (!context.visitedSymbols) {
                                 context.visitedSymbols = ts.createMap();
                             }
@@ -32016,21 +26152,19 @@ var ts;
                         }
                     }
                     else {
-                        // Anonymous types without a symbol are never circular.
                         return createTypeNodeFromObjectType(type);
                     }
                     function shouldWriteTypeOfFunctionSymbol() {
-                        var isStaticMethodSymbol = !!(symbol.flags & 8192 /* Method */) && // typeof static method
-                            ts.some(symbol.declarations, function (declaration) { return ts.hasModifier(declaration, 32 /* Static */); });
-                        var isNonLocalFunctionSymbol = !!(symbol.flags & 16 /* Function */) &&
-                            (symbol.parent || // is exported function symbol
+                        var isStaticMethodSymbol = !!(symbol.flags & 8192) &&
+                            ts.some(symbol.declarations, function (declaration) { return ts.hasModifier(declaration, 32); });
+                        var isNonLocalFunctionSymbol = !!(symbol.flags & 16) &&
+                            (symbol.parent ||
                                 ts.forEach(symbol.declarations, function (declaration) {
-                                    return declaration.parent.kind === 274 /* SourceFile */ || declaration.parent.kind === 240 /* ModuleBlock */;
+                                    return declaration.parent.kind === 274 || declaration.parent.kind === 240;
                                 }));
                         if (isStaticMethodSymbol || isNonLocalFunctionSymbol) {
-                            // typeof is allowed only for static/non local functions
-                            return (!!(context.flags & 4096 /* UseTypeOfFunction */) || (context.visitedSymbols && context.visitedSymbols.has(id))) && // it is type of the symbol uses itself recursively
-                                (!(context.flags & 8 /* UseStructuralFallback */) || isValueSymbolAccessible(symbol, context.enclosingDeclaration)); // TODO: GH#18217 // And the build is going to succeed without visibility error or there is no structural fallback allowed
+                            return (!!(context.flags & 4096) || (context.visitedSymbols && context.visitedSymbols.has(id))) &&
+                                (!(context.flags & 8) || isValueSymbolAccessible(symbol, context.enclosingDeclaration));
                         }
                     }
                 }
@@ -32041,50 +26175,50 @@ var ts;
                     var resolved = resolveStructuredTypeMembers(type);
                     if (!resolved.properties.length && !resolved.stringIndexInfo && !resolved.numberIndexInfo) {
                         if (!resolved.callSignatures.length && !resolved.constructSignatures.length) {
-                            return ts.setEmitFlags(ts.createTypeLiteralNode(/*members*/ undefined), 1 /* SingleLine */);
+                            return ts.setEmitFlags(ts.createTypeLiteralNode(undefined), 1);
                         }
                         if (resolved.callSignatures.length === 1 && !resolved.constructSignatures.length) {
                             var signature = resolved.callSignatures[0];
-                            var signatureNode = signatureToSignatureDeclarationHelper(signature, 163 /* FunctionType */, context);
+                            var signatureNode = signatureToSignatureDeclarationHelper(signature, 163, context);
                             return signatureNode;
                         }
                         if (resolved.constructSignatures.length === 1 && !resolved.callSignatures.length) {
                             var signature = resolved.constructSignatures[0];
-                            var signatureNode = signatureToSignatureDeclarationHelper(signature, 164 /* ConstructorType */, context);
+                            var signatureNode = signatureToSignatureDeclarationHelper(signature, 164, context);
                             return signatureNode;
                         }
                     }
                     var savedFlags = context.flags;
-                    context.flags |= 4194304 /* InObjectTypeLiteral */;
+                    context.flags |= 4194304;
                     var members = createTypeNodesFromResolvedType(resolved);
                     context.flags = savedFlags;
                     var typeLiteralNode = ts.createTypeLiteralNode(members);
-                    return ts.setEmitFlags(typeLiteralNode, (context.flags & 1024 /* MultilineObjectLiterals */) ? 0 : 1 /* SingleLine */);
+                    return ts.setEmitFlags(typeLiteralNode, (context.flags & 1024) ? 0 : 1);
                 }
                 function typeReferenceToTypeNode(type) {
                     var typeArguments = type.typeArguments || ts.emptyArray;
                     if (type.target === globalArrayType) {
-                        if (context.flags & 2 /* WriteArrayAsGenericType */) {
+                        if (context.flags & 2) {
                             var typeArgumentNode = typeToTypeNodeHelper(typeArguments[0], context);
                             return ts.createTypeReferenceNode("Array", [typeArgumentNode]);
                         }
                         var elementType = typeToTypeNodeHelper(typeArguments[0], context);
                         return ts.createArrayTypeNode(elementType);
                     }
-                    else if (type.target.objectFlags & 8 /* Tuple */) {
+                    else if (type.target.objectFlags & 8) {
                         if (typeArguments.length > 0) {
                             var tupleConstituentNodes = mapToTypeNodes(typeArguments.slice(0, getTypeReferenceArity(type)), context);
                             if (tupleConstituentNodes && tupleConstituentNodes.length > 0) {
                                 return ts.createTupleTypeNode(tupleConstituentNodes);
                             }
                         }
-                        if (context.encounteredError || (context.flags & 524288 /* AllowEmptyTuple */)) {
+                        if (context.encounteredError || (context.flags & 524288)) {
                             return ts.createTupleTypeNode([]);
                         }
                         context.encounteredError = true;
-                        return undefined; // TODO: GH#18217
+                        return undefined;
                     }
-                    else if (context.flags & 2048 /* WriteClassExpressionAsTypeLiteral */ &&
+                    else if (context.flags & 2048 &&
                         type.symbol.valueDeclaration &&
                         ts.isClassLike(type.symbol.valueDeclaration) &&
                         !isValueSymbolAccessible(type.symbol, context.enclosingDeclaration)) {
@@ -32097,19 +26231,16 @@ var ts;
                         if (outerTypeParameters) {
                             var length_1 = outerTypeParameters.length;
                             while (i < length_1) {
-                                // Find group of type arguments for type parameters with the same declaring container.
                                 var start = i;
                                 var parent = getParentSymbolOfTypeParameter(outerTypeParameters[i]);
                                 do {
                                     i++;
                                 } while (i < length_1 && getParentSymbolOfTypeParameter(outerTypeParameters[i]) === parent);
-                                // When type parameters are their own type arguments for the whole group (i.e. we have
-                                // the default outer type arguments), we don't show the group.
                                 if (!ts.rangeEquals(outerTypeParameters, typeArguments, start, i)) {
                                     var typeArgumentSlice = mapToTypeNodes(typeArguments.slice(start, i), context);
                                     var flags_2 = context.flags;
-                                    context.flags |= 16 /* ForbidIndexedAccessSymbolReferences */;
-                                    var ref = symbolToTypeNode(parent, context, 67901928 /* Type */, typeArgumentSlice);
+                                    context.flags |= 16;
+                                    var ref = symbolToTypeNode(parent, context, 67901928, typeArgumentSlice);
                                     context.flags = flags_2;
                                     resultType = !resultType ? ref : appendReferenceToType(resultType, ref);
                                 }
@@ -32121,21 +26252,19 @@ var ts;
                             typeArgumentNodes = mapToTypeNodes(typeArguments.slice(i, typeParameterCount), context);
                         }
                         var flags = context.flags;
-                        context.flags |= 16 /* ForbidIndexedAccessSymbolReferences */;
-                        var finalRef = symbolToTypeNode(type.symbol, context, 67901928 /* Type */, typeArgumentNodes);
+                        context.flags |= 16;
+                        var finalRef = symbolToTypeNode(type.symbol, context, 67901928, typeArgumentNodes);
                         context.flags = flags;
                         return !resultType ? finalRef : appendReferenceToType(resultType, finalRef);
                     }
                 }
                 function appendReferenceToType(root, ref) {
                     if (ts.isImportTypeNode(root)) {
-                        // first shift type arguments
                         var innerParams = root.typeArguments;
                         if (root.qualifier) {
                             (ts.isIdentifier(root.qualifier) ? root.qualifier : root.qualifier.right).typeArguments = innerParams;
                         }
                         root.typeArguments = ref.typeArguments;
-                        // then move qualifiers
                         var ids = getAccessStack(ref);
                         for (var _i = 0, ids_1 = ids; _i < ids_1.length; _i++) {
                             var id = ids_1[_i];
@@ -32144,11 +26273,9 @@ var ts;
                         return root;
                     }
                     else {
-                        // first shift type arguments
                         var innerParams = root.typeArguments;
                         (ts.isIdentifier(root.typeName) ? root.typeName : root.typeName.right).typeArguments = innerParams;
                         root.typeArguments = ref.typeArguments;
-                        // then move qualifiers
                         var ids = getAccessStack(ref);
                         for (var _a = 0, ids_2 = ids; _a < ids_2.length; _a++) {
                             var id = ids_2[_a];
@@ -32171,20 +26298,20 @@ var ts;
                     var typeElements = [];
                     for (var _i = 0, _a = resolvedType.callSignatures; _i < _a.length; _i++) {
                         var signature = _a[_i];
-                        typeElements.push(signatureToSignatureDeclarationHelper(signature, 158 /* CallSignature */, context));
+                        typeElements.push(signatureToSignatureDeclarationHelper(signature, 158, context));
                     }
                     for (var _b = 0, _c = resolvedType.constructSignatures; _b < _c.length; _b++) {
                         var signature = _c[_b];
-                        typeElements.push(signatureToSignatureDeclarationHelper(signature, 159 /* ConstructSignature */, context));
+                        typeElements.push(signatureToSignatureDeclarationHelper(signature, 159, context));
                     }
                     if (resolvedType.stringIndexInfo) {
-                        var indexInfo = resolvedType.objectFlags & 2048 /* ReverseMapped */ ?
+                        var indexInfo = resolvedType.objectFlags & 2048 ?
                             createIndexInfo(anyType, resolvedType.stringIndexInfo.isReadonly, resolvedType.stringIndexInfo.declaration) :
                             resolvedType.stringIndexInfo;
-                        typeElements.push(indexInfoToIndexSignatureDeclarationHelper(indexInfo, 0 /* String */, context));
+                        typeElements.push(indexInfoToIndexSignatureDeclarationHelper(indexInfo, 0, context));
                     }
                     if (resolvedType.numberIndexInfo) {
-                        typeElements.push(indexInfoToIndexSignatureDeclarationHelper(resolvedType.numberIndexInfo, 1 /* Number */, context));
+                        typeElements.push(indexInfoToIndexSignatureDeclarationHelper(resolvedType.numberIndexInfo, 1, context));
                     }
                     var properties = resolvedType.properties;
                     if (!properties) {
@@ -32192,41 +26319,39 @@ var ts;
                     }
                     for (var _d = 0, properties_1 = properties; _d < properties_1.length; _d++) {
                         var propertySymbol = properties_1[_d];
-                        if (context.flags & 2048 /* WriteClassExpressionAsTypeLiteral */) {
-                            if (propertySymbol.flags & 4194304 /* Prototype */) {
+                        if (context.flags & 2048) {
+                            if (propertySymbol.flags & 4194304) {
                                 continue;
                             }
-                            if (ts.getDeclarationModifierFlagsFromSymbol(propertySymbol) & (8 /* Private */ | 16 /* Protected */) && context.tracker.reportPrivateInBaseOfClassExpression) {
+                            if (ts.getDeclarationModifierFlagsFromSymbol(propertySymbol) & (8 | 16) && context.tracker.reportPrivateInBaseOfClassExpression) {
                                 context.tracker.reportPrivateInBaseOfClassExpression(ts.unescapeLeadingUnderscores(propertySymbol.escapedName));
                             }
                         }
-                        var propertyType = ts.getCheckFlags(propertySymbol) & 2048 /* ReverseMapped */ && context.flags & 33554432 /* InReverseMappedType */ ?
+                        var propertyType = ts.getCheckFlags(propertySymbol) & 2048 && context.flags & 33554432 ?
                             anyType : getTypeOfSymbol(propertySymbol);
                         var saveEnclosingDeclaration = context.enclosingDeclaration;
                         context.enclosingDeclaration = undefined;
-                        if (ts.getCheckFlags(propertySymbol) & 1024 /* Late */) {
+                        if (ts.getCheckFlags(propertySymbol) & 1024) {
                             var decl = ts.first(propertySymbol.declarations);
                             if (context.tracker.trackSymbol && hasLateBindableName(decl)) {
-                                // get symbol of the first identifier of the entityName
                                 var firstIdentifier = getFirstIdentifier(decl.name.expression);
-                                var name = resolveName(firstIdentifier, firstIdentifier.escapedText, 67216319 /* Value */ | 1048576 /* ExportValue */, /*nodeNotFoundErrorMessage*/ undefined, /*nameArg*/ undefined, /*isUse*/ true);
+                                var name = resolveName(firstIdentifier, firstIdentifier.escapedText, 67216319 | 1048576, undefined, undefined, true);
                                 if (name) {
-                                    context.tracker.trackSymbol(name, saveEnclosingDeclaration, 67216319 /* Value */);
+                                    context.tracker.trackSymbol(name, saveEnclosingDeclaration, 67216319);
                                 }
                             }
                         }
-                        var propertyName = symbolToName(propertySymbol, context, 67216319 /* Value */, /*expectsIdentifier*/ true);
+                        var propertyName = symbolToName(propertySymbol, context, 67216319, true);
                         context.enclosingDeclaration = saveEnclosingDeclaration;
-                        var optionalToken = propertySymbol.flags & 16777216 /* Optional */ ? ts.createToken(55 /* QuestionToken */) : undefined;
-                        if (propertySymbol.flags & (16 /* Function */ | 8192 /* Method */) && !getPropertiesOfObjectType(propertyType).length) {
-                            var signatures = getSignaturesOfType(propertyType, 0 /* Call */);
+                        var optionalToken = propertySymbol.flags & 16777216 ? ts.createToken(55) : undefined;
+                        if (propertySymbol.flags & (16 | 8192) && !getPropertiesOfObjectType(propertyType).length) {
+                            var signatures = getSignaturesOfType(propertyType, 0);
                             for (var _e = 0, signatures_1 = signatures; _e < signatures_1.length; _e++) {
                                 var signature = signatures_1[_e];
-                                var methodDeclaration = signatureToSignatureDeclarationHelper(signature, 153 /* MethodSignature */, context);
+                                var methodDeclaration = signatureToSignatureDeclarationHelper(signature, 153, context);
                                 methodDeclaration.name = propertyName;
                                 methodDeclaration.questionToken = optionalToken;
                                 if (propertySymbol.valueDeclaration) {
-                                    // Copy comments to node for declaration emit
                                     ts.setCommentRange(methodDeclaration, propertySymbol.valueDeclaration);
                                 }
                                 typeElements.push(methodDeclaration);
@@ -32234,14 +26359,12 @@ var ts;
                         }
                         else {
                             var savedFlags = context.flags;
-                            context.flags |= !!(ts.getCheckFlags(propertySymbol) & 2048 /* ReverseMapped */) ? 33554432 /* InReverseMappedType */ : 0;
-                            var propertyTypeNode = propertyType ? typeToTypeNodeHelper(propertyType, context) : ts.createKeywordTypeNode(119 /* AnyKeyword */);
+                            context.flags |= !!(ts.getCheckFlags(propertySymbol) & 2048) ? 33554432 : 0;
+                            var propertyTypeNode = propertyType ? typeToTypeNodeHelper(propertyType, context) : ts.createKeywordTypeNode(119);
                             context.flags = savedFlags;
-                            var modifiers = isReadonlySymbol(propertySymbol) ? [ts.createToken(132 /* ReadonlyKeyword */)] : undefined;
-                            var propertySignature = ts.createPropertySignature(modifiers, propertyName, optionalToken, propertyTypeNode, 
-                            /*initializer*/ undefined);
+                            var modifiers = isReadonlySymbol(propertySymbol) ? [ts.createToken(132)] : undefined;
+                            var propertySignature = ts.createPropertySignature(modifiers, propertyName, optionalToken, propertyTypeNode, undefined);
                             if (propertySymbol.valueDeclaration) {
-                                // Copy comments to node for declaration emit
                                 ts.setCommentRange(propertySignature, propertySymbol.valueDeclaration);
                             }
                             typeElements.push(propertySignature);
@@ -32265,30 +26388,24 @@ var ts;
             }
             function indexInfoToIndexSignatureDeclarationHelper(indexInfo, kind, context) {
                 var name = ts.getNameFromIndexInfo(indexInfo) || "x";
-                var indexerTypeNode = ts.createKeywordTypeNode(kind === 0 /* String */ ? 137 /* StringKeyword */ : 134 /* NumberKeyword */);
-                var indexingParameter = ts.createParameter(
-                /*decorators*/ undefined, 
-                /*modifiers*/ undefined, 
-                /*dotDotDotToken*/ undefined, name, 
-                /*questionToken*/ undefined, indexerTypeNode, 
-                /*initializer*/ undefined);
+                var indexerTypeNode = ts.createKeywordTypeNode(kind === 0 ? 137 : 134);
+                var indexingParameter = ts.createParameter(undefined, undefined, undefined, name, undefined, indexerTypeNode, undefined);
                 var typeNode = typeToTypeNodeHelper(indexInfo.type || anyType, context);
-                if (!indexInfo.type && !(context.flags & 2097152 /* AllowEmptyIndexInfoType */)) {
+                if (!indexInfo.type && !(context.flags & 2097152)) {
                     context.encounteredError = true;
                 }
-                return ts.createIndexSignature(
-                /*decorators*/ undefined, indexInfo.isReadonly ? [ts.createToken(132 /* ReadonlyKeyword */)] : undefined, [indexingParameter], typeNode);
+                return ts.createIndexSignature(undefined, indexInfo.isReadonly ? [ts.createToken(132)] : undefined, [indexingParameter], typeNode);
             }
             function signatureToSignatureDeclarationHelper(signature, kind, context) {
                 var typeParameters;
                 var typeArguments;
-                if (context.flags & 32 /* WriteTypeArgumentsOfSignature */ && signature.target && signature.mapper && signature.target.typeParameters) {
+                if (context.flags & 32 && signature.target && signature.mapper && signature.target.typeParameters) {
                     typeArguments = signature.target.typeParameters.map(function (parameter) { return typeToTypeNodeHelper(instantiateType(parameter, signature.mapper), context); });
                 }
                 else {
                     typeParameters = signature.typeParameters && signature.typeParameters.map(function (parameter) { return typeParameterToDeclaration(parameter, context); });
                 }
-                var parameters = signature.parameters.map(function (parameter) { return symbolToParameterDeclaration(parameter, context, kind === 155 /* Constructor */); });
+                var parameters = signature.parameters.map(function (parameter) { return symbolToParameterDeclaration(parameter, context, kind === 155); });
                 if (signature.thisParameter) {
                     var thisParameter = symbolToParameterDeclaration(signature.thisParameter, context);
                     parameters.unshift(thisParameter);
@@ -32296,8 +26413,8 @@ var ts;
                 var returnTypeNode;
                 var typePredicate = getTypePredicateOfSignature(signature);
                 if (typePredicate) {
-                    var parameterName = typePredicate.kind === 1 /* Identifier */ ?
-                        ts.setEmitFlags(ts.createIdentifier(typePredicate.parameterName), 16777216 /* NoAsciiEscaping */) :
+                    var parameterName = typePredicate.kind === 1 ?
+                        ts.setEmitFlags(ts.createIdentifier(typePredicate.parameterName), 16777216) :
                         ts.createThisTypeNode();
                     var typeNode = typeToTypeNodeHelper(typePredicate.type, context);
                     returnTypeNode = ts.createTypePredicateNode(parameterName, typeNode);
@@ -32306,29 +26423,29 @@ var ts;
                     var returnType = getReturnTypeOfSignature(signature);
                     returnTypeNode = returnType && typeToTypeNodeHelper(returnType, context);
                 }
-                if (context.flags & 256 /* SuppressAnyReturnType */) {
-                    if (returnTypeNode && returnTypeNode.kind === 119 /* AnyKeyword */) {
+                if (context.flags & 256) {
+                    if (returnTypeNode && returnTypeNode.kind === 119) {
                         returnTypeNode = undefined;
                     }
                 }
                 else if (!returnTypeNode) {
-                    returnTypeNode = ts.createKeywordTypeNode(119 /* AnyKeyword */);
+                    returnTypeNode = ts.createKeywordTypeNode(119);
                 }
                 return ts.createSignatureDeclaration(kind, typeParameters, parameters, returnTypeNode, typeArguments);
             }
             function typeParameterShadowsNameInScope(type, context) {
-                return !!resolveName(context.enclosingDeclaration, type.symbol.escapedName, 67901928 /* Type */, /*nameNotFoundArg*/ undefined, type.symbol.escapedName, /*isUse*/ false);
+                return !!resolveName(context.enclosingDeclaration, type.symbol.escapedName, 67901928, undefined, type.symbol.escapedName, false);
             }
             function typeParameterToDeclarationWithConstraint(type, context, constraintNode) {
                 var savedContextFlags = context.flags;
-                context.flags &= ~512 /* WriteTypeParametersInQualifiedName */; // Avoids potential infinite loop when building for a claimspace with a generic
-                var shouldUseGeneratedName = context.flags & 4 /* GenerateNamesForShadowedTypeParams */ &&
+                context.flags &= ~512;
+                var shouldUseGeneratedName = context.flags & 4 &&
                     type.symbol.declarations[0] &&
                     ts.isTypeParameterDeclaration(type.symbol.declarations[0]) &&
                     typeParameterShadowsNameInScope(type, context);
                 var name = shouldUseGeneratedName
-                    ? ts.getGeneratedNameForNode(type.symbol.declarations[0].name, 16 /* Optimistic */ | 8 /* ReservedInNestedScopes */)
-                    : symbolToName(type.symbol, context, 67901928 /* Type */, /*expectsIdentifier*/ true);
+                    ? ts.getGeneratedNameForNode(type.symbol.declarations[0].name, 16 | 8)
+                    : symbolToName(type.symbol, context, 67901928, true);
                 var defaultParameter = getDefaultFromTypeParameter(type);
                 var defaultParameterNode = defaultParameter && typeToTypeNodeHelper(defaultParameter, context);
                 context.flags = savedContextFlags;
@@ -32340,65 +26457,60 @@ var ts;
                 return typeParameterToDeclarationWithConstraint(type, context, constraintNode);
             }
             function symbolToParameterDeclaration(parameterSymbol, context, preserveModifierFlags) {
-                var parameterDeclaration = ts.getDeclarationOfKind(parameterSymbol, 149 /* Parameter */);
+                var parameterDeclaration = ts.getDeclarationOfKind(parameterSymbol, 149);
                 if (!parameterDeclaration && !isTransientSymbol(parameterSymbol)) {
-                    parameterDeclaration = ts.getDeclarationOfKind(parameterSymbol, 293 /* JSDocParameterTag */);
+                    parameterDeclaration = ts.getDeclarationOfKind(parameterSymbol, 293);
                 }
                 var parameterType = getTypeOfSymbol(parameterSymbol);
                 if (parameterDeclaration && isRequiredInitializedParameter(parameterDeclaration)) {
                     parameterType = getOptionalType(parameterType);
                 }
                 var parameterTypeNode = typeToTypeNodeHelper(parameterType, context);
-                var modifiers = !(context.flags & 8192 /* OmitParameterModifiers */) && preserveModifierFlags && parameterDeclaration && parameterDeclaration.modifiers ? parameterDeclaration.modifiers.map(ts.getSynthesizedClone) : undefined;
+                var modifiers = !(context.flags & 8192) && preserveModifierFlags && parameterDeclaration && parameterDeclaration.modifiers ? parameterDeclaration.modifiers.map(ts.getSynthesizedClone) : undefined;
                 var isRest = parameterDeclaration ? ts.isRestParameter(parameterDeclaration) : parameterSymbol.isRestParameter;
-                var dotDotDotToken = isRest ? ts.createToken(24 /* DotDotDotToken */) : undefined;
+                var dotDotDotToken = isRest ? ts.createToken(24) : undefined;
                 var name = parameterDeclaration
                     ? parameterDeclaration.name ?
-                        parameterDeclaration.name.kind === 71 /* Identifier */ ? ts.setEmitFlags(ts.getSynthesizedClone(parameterDeclaration.name), 16777216 /* NoAsciiEscaping */) :
-                            parameterDeclaration.name.kind === 146 /* QualifiedName */ ? ts.setEmitFlags(ts.getSynthesizedClone(parameterDeclaration.name.right), 16777216 /* NoAsciiEscaping */) :
+                        parameterDeclaration.name.kind === 71 ? ts.setEmitFlags(ts.getSynthesizedClone(parameterDeclaration.name), 16777216) :
+                            parameterDeclaration.name.kind === 146 ? ts.setEmitFlags(ts.getSynthesizedClone(parameterDeclaration.name.right), 16777216) :
                                 cloneBindingName(parameterDeclaration.name) :
                         ts.symbolName(parameterSymbol)
                     : ts.symbolName(parameterSymbol);
-                var questionToken = parameterDeclaration && isOptionalParameter(parameterDeclaration) ? ts.createToken(55 /* QuestionToken */) : undefined;
-                var parameterNode = ts.createParameter(
-                /*decorators*/ undefined, modifiers, dotDotDotToken, name, questionToken, parameterTypeNode, 
-                /*initializer*/ undefined);
+                var questionToken = parameterDeclaration && isOptionalParameter(parameterDeclaration) ? ts.createToken(55) : undefined;
+                var parameterNode = ts.createParameter(undefined, modifiers, dotDotDotToken, name, questionToken, parameterTypeNode, undefined);
                 return parameterNode;
                 function cloneBindingName(node) {
                     return elideInitializerAndSetEmitFlags(node);
                     function elideInitializerAndSetEmitFlags(node) {
-                        var visited = ts.visitEachChild(node, elideInitializerAndSetEmitFlags, ts.nullTransformationContext, /*nodesVisitor*/ undefined, elideInitializerAndSetEmitFlags);
+                        var visited = ts.visitEachChild(node, elideInitializerAndSetEmitFlags, ts.nullTransformationContext, undefined, elideInitializerAndSetEmitFlags);
                         var clone = ts.nodeIsSynthesized(visited) ? visited : ts.getSynthesizedClone(visited);
-                        if (clone.kind === 182 /* BindingElement */) {
+                        if (clone.kind === 182) {
                             clone.initializer = undefined;
                         }
-                        return ts.setEmitFlags(clone, 1 /* SingleLine */ | 16777216 /* NoAsciiEscaping */);
+                        return ts.setEmitFlags(clone, 1 | 16777216);
                     }
                 }
             }
             function lookupSymbolChain(symbol, context, meaning, yieldModuleSymbol) {
-                context.tracker.trackSymbol(symbol, context.enclosingDeclaration, meaning); // TODO: GH#18217
-                // Try to get qualified name if the symbol is not a type parameter and there is an enclosing declaration.
+                context.tracker.trackSymbol(symbol, context.enclosingDeclaration, meaning);
                 var chain;
-                var isTypeParameter = symbol.flags & 262144 /* TypeParameter */;
-                if (!isTypeParameter && (context.enclosingDeclaration || context.flags & 64 /* UseFullyQualifiedType */)) {
-                    chain = ts.Debug.assertDefined(getSymbolChain(symbol, meaning, /*endOfChain*/ true));
+                var isTypeParameter = symbol.flags & 262144;
+                if (!isTypeParameter && (context.enclosingDeclaration || context.flags & 64)) {
+                    chain = ts.Debug.assertDefined(getSymbolChain(symbol, meaning, true));
                     ts.Debug.assert(chain && chain.length > 0);
                 }
                 else {
                     chain = [symbol];
                 }
                 return chain;
-                /** @param endOfChain Set to false for recursive calls; non-recursive calls should always output something. */
                 function getSymbolChain(symbol, meaning, endOfChain) {
-                    var accessibleSymbolChain = getAccessibleSymbolChain(symbol, context.enclosingDeclaration, meaning, !!(context.flags & 128 /* UseOnlyExternalAliasing */));
+                    var accessibleSymbolChain = getAccessibleSymbolChain(symbol, context.enclosingDeclaration, meaning, !!(context.flags & 128));
                     var parentSymbol;
                     if (!accessibleSymbolChain ||
                         needsQualification(accessibleSymbolChain[0], context.enclosingDeclaration, accessibleSymbolChain.length === 1 ? meaning : getQualifiedLeftMeaning(meaning))) {
-                        // Go up and add our parent.
                         var parent = getContainerOfSymbol(accessibleSymbolChain ? accessibleSymbolChain[0] : symbol);
                         if (parent) {
-                            var parentChain = getSymbolChain(parent, getQualifiedLeftMeaning(meaning), /*endOfChain*/ false);
+                            var parentChain = getSymbolChain(parent, getQualifiedLeftMeaning(meaning), false);
                             if (parentChain) {
                                 parentSymbol = parent;
                                 accessibleSymbolChain = parentChain.concat(accessibleSymbolChain || [getAliasForSymbolInContainer(parent, symbol) || symbol]);
@@ -32408,13 +26520,9 @@ var ts;
                     if (accessibleSymbolChain) {
                         return accessibleSymbolChain;
                     }
-                    if (
-                    // If this is the last part of outputting the symbol, always output. The cases apply only to parent symbols.
-                    endOfChain ||
-                        // If a parent symbol is an external module, don't write it. (We prefer just `x` vs `"foo/bar".x`.)
+                    if (endOfChain ||
                         (yieldModuleSymbol || !(!parentSymbol && ts.forEach(symbol.declarations, hasNonGlobalAugmentationExternalModuleSymbol))) &&
-                            // If a parent symbol is an anonymous type, don't write it.
-                            !(symbol.flags & (2048 /* TypeLiteral */ | 4096 /* ObjectLiteral */))) {
+                            !(symbol.flags & (2048 | 4096))) {
                         return [symbol];
                     }
                 }
@@ -32422,7 +26530,7 @@ var ts;
             function typeParametersToTypeParameterDeclarations(symbol, context) {
                 var typeParameterNodes;
                 var targetSymbol = getTargetSymbol(symbol);
-                if (targetSymbol.flags & (32 /* Class */ | 64 /* Interface */ | 524288 /* TypeAlias */)) {
+                if (targetSymbol.flags & (32 | 64 | 524288)) {
                     typeParameterNodes = ts.createNodeArray(ts.map(getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol), function (tp) { return typeParameterToDeclaration(tp, context); }));
                 }
                 return typeParameterNodes;
@@ -32431,11 +26539,11 @@ var ts;
                 ts.Debug.assert(chain && 0 <= index && index < chain.length);
                 var symbol = chain[index];
                 var typeParameterNodes;
-                if (context.flags & 512 /* WriteTypeParametersInQualifiedName */ && index < (chain.length - 1)) {
+                if (context.flags & 512 && index < (chain.length - 1)) {
                     var parentSymbol = symbol;
                     var nextSymbol = chain[index + 1];
-                    if (ts.getCheckFlags(nextSymbol) & 1 /* Instantiated */) {
-                        var params = getTypeParametersOfClassOrInterface(parentSymbol.flags & 2097152 /* Alias */ ? resolveAlias(parentSymbol) : parentSymbol);
+                    if (ts.getCheckFlags(nextSymbol) & 1) {
+                        var params = getTypeParametersOfClassOrInterface(parentSymbol.flags & 2097152 ? resolveAlias(parentSymbol) : parentSymbol);
                         typeParameterNodes = mapToTypeNodes(ts.map(params, nextSymbol.mapper), context);
                     }
                     else {
@@ -32444,9 +26552,6 @@ var ts;
                 }
                 return typeParameterNodes;
             }
-            /**
-             * Given A[B][C][D], finds A[B]
-             */
             function getTopmostIndexedAccessType(top) {
                 if (ts.isIndexedAccessTypeNode(top.objectType)) {
                     return getTopmostIndexedAccessType(top.objectType);
@@ -32454,13 +26559,12 @@ var ts;
                 return top;
             }
             function symbolToTypeNode(symbol, context, meaning, overrideTypeArguments) {
-                var chain = lookupSymbolChain(symbol, context, meaning, !(context.flags & 16384 /* UseAliasDefinedOutsideCurrentScope */)); // If we're using aliases outside the current scope, dont bother with the module
-                context.flags |= 16777216 /* InInitialEntityName */;
+                var chain = lookupSymbolChain(symbol, context, meaning, !(context.flags & 16384));
+                context.flags |= 16777216;
                 var rootName = getNameOfSymbolAsWritten(chain[0], context);
-                context.flags ^= 16777216 /* InInitialEntityName */;
-                var isTypeOf = meaning === 67216319 /* Value */;
+                context.flags ^= 16777216;
+                var isTypeOf = meaning === 67216319;
                 if (ambientModuleSymbolRegex.test(rootName)) {
-                    // module is root, must use `ImportTypeNode`
                     var nonRootParts = chain.length > 1 ? createAccessFromSymbolChain(chain, chain.length - 1, 1) : undefined;
                     var typeParameterNodes = overrideTypeArguments || lookupTypeParameterNodes(chain, 0, context);
                     var lit = ts.createLiteralTypeNode(ts.createLiteral(rootName.substring(1, rootName.length - 1)));
@@ -32479,7 +26583,7 @@ var ts;
                 }
                 var entityName = createAccessFromSymbolChain(chain, chain.length - 1, 0);
                 if (ts.isIndexedAccessTypeNode(entityName)) {
-                    return entityName; // Indexed accesses can never be `typeof`
+                    return entityName;
                 }
                 if (isTypeOf) {
                     return ts.createTypeQueryNode(entityName);
@@ -32494,15 +26598,14 @@ var ts;
                     var typeParameterNodes = index === (chain.length - 1) ? overrideTypeArguments : lookupTypeParameterNodes(chain, index, context);
                     var symbol = chain[index];
                     if (index === 0) {
-                        context.flags |= 16777216 /* InInitialEntityName */;
+                        context.flags |= 16777216;
                     }
                     var symbolName = getNameOfSymbolAsWritten(symbol, context);
                     if (index === 0) {
-                        context.flags ^= 16777216 /* InInitialEntityName */;
+                        context.flags ^= 16777216;
                     }
                     var parent = chain[index - 1];
-                    if (!(context.flags & 16 /* ForbidIndexedAccessSymbolReferences */) && parent && getMembersOfSymbol(parent) && getMembersOfSymbol(parent).get(symbol.escapedName) === symbol) {
-                        // Should use an indexed access
+                    if (!(context.flags & 16) && parent && getMembersOfSymbol(parent) && getMembersOfSymbol(parent).get(symbol.escapedName) === symbol) {
                         var LHS = createAccessFromSymbolChain(chain, index - 1, stopper);
                         if (ts.isIndexedAccessTypeNode(LHS)) {
                             return ts.createIndexedAccessTypeNode(LHS, ts.createLiteralTypeNode(ts.createLiteral(symbolName)));
@@ -32511,7 +26614,7 @@ var ts;
                             return ts.createIndexedAccessTypeNode(ts.createTypeReferenceNode(LHS, typeParameterNodes), ts.createLiteralTypeNode(ts.createLiteral(symbolName)));
                         }
                     }
-                    var identifier = ts.setEmitFlags(ts.createIdentifier(symbolName, typeParameterNodes), 16777216 /* NoAsciiEscaping */);
+                    var identifier = ts.setEmitFlags(ts.createIdentifier(symbolName, typeParameterNodes), 16777216);
                     identifier.symbol = symbol;
                     if (index > stopper) {
                         var LHS = createAccessFromSymbolChain(chain, index - 1, stopper);
@@ -32527,7 +26630,7 @@ var ts;
                 var chain = lookupSymbolChain(symbol, context, meaning);
                 if (expectsIdentifier && chain.length !== 1
                     && !context.encounteredError
-                    && !(context.flags & 65536 /* AllowQualifedNameInPlaceOfIdentifier */)) {
+                    && !(context.flags & 65536)) {
                     context.encounteredError = true;
                 }
                 return createEntityNameFromSymbolChain(chain, chain.length - 1);
@@ -32535,13 +26638,13 @@ var ts;
                     var typeParameterNodes = lookupTypeParameterNodes(chain, index, context);
                     var symbol = chain[index];
                     if (index === 0) {
-                        context.flags |= 16777216 /* InInitialEntityName */;
+                        context.flags |= 16777216;
                     }
                     var symbolName = getNameOfSymbolAsWritten(symbol, context);
                     if (index === 0) {
-                        context.flags ^= 16777216 /* InInitialEntityName */;
+                        context.flags ^= 16777216;
                     }
-                    var identifier = ts.setEmitFlags(ts.createIdentifier(symbolName, typeParameterNodes), 16777216 /* NoAsciiEscaping */);
+                    var identifier = ts.setEmitFlags(ts.createIdentifier(symbolName, typeParameterNodes), 16777216);
                     identifier.symbol = symbol;
                     return index > 0 ? ts.createQualifiedName(createEntityNameFromSymbolChain(chain, index - 1), identifier) : identifier;
                 }
@@ -32553,34 +26656,34 @@ var ts;
                     var typeParameterNodes = lookupTypeParameterNodes(chain, index, context);
                     var symbol = chain[index];
                     if (index === 0) {
-                        context.flags |= 16777216 /* InInitialEntityName */;
+                        context.flags |= 16777216;
                     }
                     var symbolName = getNameOfSymbolAsWritten(symbol, context);
                     if (index === 0) {
-                        context.flags ^= 16777216 /* InInitialEntityName */;
+                        context.flags ^= 16777216;
                     }
                     var firstChar = symbolName.charCodeAt(0);
                     var canUsePropertyAccess = ts.isIdentifierStart(firstChar, languageVersion);
                     if (index === 0 || canUsePropertyAccess) {
-                        var identifier = ts.setEmitFlags(ts.createIdentifier(symbolName, typeParameterNodes), 16777216 /* NoAsciiEscaping */);
+                        var identifier = ts.setEmitFlags(ts.createIdentifier(symbolName, typeParameterNodes), 16777216);
                         identifier.symbol = symbol;
                         return index > 0 ? ts.createPropertyAccess(createExpressionFromSymbolChain(chain, index - 1), identifier) : identifier;
                     }
                     else {
-                        if (firstChar === 91 /* openBracket */) {
+                        if (firstChar === 91) {
                             symbolName = symbolName.substring(1, symbolName.length - 1);
                             firstChar = symbolName.charCodeAt(0);
                         }
                         var expression = void 0;
                         if (ts.isSingleOrDoubleQuote(firstChar)) {
                             expression = ts.createLiteral(symbolName.substring(1, symbolName.length - 1).replace(/\\./g, function (s) { return s.substring(1); }));
-                            expression.singleQuote = firstChar === 39 /* singleQuote */;
+                            expression.singleQuote = firstChar === 39;
                         }
                         else if (("" + +symbolName) === symbolName) {
                             expression = ts.createLiteral(+symbolName);
                         }
                         if (!expression) {
-                            expression = ts.setEmitFlags(ts.createIdentifier(symbolName, typeParameterNodes), 16777216 /* NoAsciiEscaping */);
+                            expression = ts.setEmitFlags(ts.createIdentifier(symbolName, typeParameterNodes), 16777216);
                             expression.symbol = symbol;
                         }
                         return ts.createElementAccess(createExpressionFromSymbolChain(chain, index - 1), expression);
@@ -32589,13 +26692,13 @@ var ts;
             }
         }
         function typePredicateToString(typePredicate, enclosingDeclaration, flags, writer) {
-            if (flags === void 0) { flags = 16384 /* UseAliasDefinedOutsideCurrentScope */; }
+            if (flags === void 0) { flags = 16384; }
             return writer ? typePredicateToStringWorker(writer).getText() : ts.usingSingleLineStringWriter(typePredicateToStringWorker);
             function typePredicateToStringWorker(writer) {
-                var predicate = ts.createTypePredicateNode(typePredicate.kind === 1 /* Identifier */ ? ts.createIdentifier(typePredicate.parameterName) : ts.createThisTypeNode(), nodeBuilder.typeToTypeNode(typePredicate.type, enclosingDeclaration, toNodeBuilderFlags(flags) | 3112960 /* IgnoreErrors */ | 512 /* WriteTypeParametersInQualifiedName */));
+                var predicate = ts.createTypePredicateNode(typePredicate.kind === 1 ? ts.createIdentifier(typePredicate.parameterName) : ts.createThisTypeNode(), nodeBuilder.typeToTypeNode(typePredicate.type, enclosingDeclaration, toNodeBuilderFlags(flags) | 3112960 | 512));
                 var printer = ts.createPrinter({ removeComments: true });
                 var sourceFile = enclosingDeclaration && ts.getSourceFileOfNode(enclosingDeclaration);
-                printer.writeNode(4 /* Unspecified */, predicate, /*sourceFile*/ sourceFile, writer);
+                printer.writeNode(4, predicate, sourceFile, writer);
                 return writer;
             }
         }
@@ -32605,10 +26708,10 @@ var ts;
             for (var i = 0; i < types.length; i++) {
                 var t = types[i];
                 flags |= t.flags;
-                if (!(t.flags & 24576 /* Nullable */)) {
-                    if (t.flags & (256 /* BooleanLiteral */ | 512 /* EnumLiteral */)) {
-                        var baseType = t.flags & 256 /* BooleanLiteral */ ? booleanType : getBaseTypeOfEnumLiteralType(t);
-                        if (baseType.flags & 262144 /* Union */) {
+                if (!(t.flags & 24576)) {
+                    if (t.flags & (256 | 512)) {
+                        var baseType = t.flags & 256 ? booleanType : getBaseTypeOfEnumLiteralType(t);
+                        if (baseType.flags & 262144) {
                             var count = baseType.types.length;
                             if (i + count <= types.length && types[i + count - 1] === baseType.types[count - 1]) {
                                 result.push(baseType);
@@ -32620,25 +26723,25 @@ var ts;
                     result.push(t);
                 }
             }
-            if (flags & 16384 /* Null */)
+            if (flags & 16384)
                 result.push(nullType);
-            if (flags & 8192 /* Undefined */)
+            if (flags & 8192)
                 result.push(undefinedType);
             return result || types;
         }
         function visibilityToString(flags) {
-            if (flags === 8 /* Private */) {
+            if (flags === 8) {
                 return "private";
             }
-            if (flags === 16 /* Protected */) {
+            if (flags === 16) {
                 return "protected";
             }
             return "public";
         }
         function getTypeAliasForTypeLiteral(type) {
-            if (type.symbol && type.symbol.flags & 2048 /* TypeLiteral */) {
-                var node = ts.findAncestor(type.symbol.declarations[0].parent, function (n) { return n.kind !== 173 /* ParenthesizedType */; });
-                if (node.kind === 237 /* TypeAliasDeclaration */) {
+            if (type.symbol && type.symbol.flags & 2048) {
+                var node = ts.findAncestor(type.symbol.declarations[0].parent, function (n) { return n.kind !== 173; });
+                if (node.kind === 237) {
                     return getSymbolOfNode(node);
                 }
             }
@@ -32646,43 +26749,32 @@ var ts;
         }
         function isTopLevelInExternalModuleAugmentation(node) {
             return node && node.parent &&
-                node.parent.kind === 240 /* ModuleBlock */ &&
+                node.parent.kind === 240 &&
                 ts.isExternalModuleAugmentation(node.parent.parent);
         }
         function isDefaultBindingContext(location) {
-            return location.kind === 274 /* SourceFile */ || ts.isAmbientModule(location);
-        }
-        /**
-         * Gets a human-readable name for a symbol.
-         * Should *not* be used for the right-hand side of a `.` -- use `symbolName(symbol)` for that instead.
-         *
-         * Unlike `symbolName(symbol)`, this will include quotes if the name is from a string literal.
-         * It will also use a representation of a number as written instead of a decimal form, e.g. `0o11` instead of `9`.
-         */
+            return location.kind === 274 || ts.isAmbientModule(location);
+        }
         function getNameOfSymbolAsWritten(symbol, context) {
-            if (context && symbol.escapedName === "default" /* Default */ && !(context.flags & 16384 /* UseAliasDefinedOutsideCurrentScope */) &&
-                // If it's not the first part of an entity name, it must print as `default`
-                (!(context.flags & 16777216 /* InInitialEntityName */) ||
-                    // if the symbol is synthesized, it will only be referenced externally it must print as `default`
+            if (context && symbol.escapedName === "default" && !(context.flags & 16384) &&
+                (!(context.flags & 16777216) ||
                     !symbol.declarations ||
-                    // if not in the same binding context (source file, module declaration), it must print as `default`
                     (context.enclosingDeclaration && ts.findAncestor(symbol.declarations[0], isDefaultBindingContext) !== ts.findAncestor(context.enclosingDeclaration, isDefaultBindingContext)))) {
                 return "default";
             }
             if (symbol.declarations && symbol.declarations.length) {
-                if (ts.some(symbol.declarations, hasExternalModuleSymbol) && context.enclosingDeclaration) { // TODO: GH#18217
-                    var file = ts.getDeclarationOfKind(symbol, 274 /* SourceFile */);
+                if (ts.some(symbol.declarations, hasExternalModuleSymbol) && context.enclosingDeclaration) {
+                    var file = ts.getDeclarationOfKind(symbol, 274);
                     if (!file || !context.tracker.moduleResolverHost) {
                         if (context.tracker.trackReferencedAmbientModule) {
                             var ambientDecls = ts.filter(symbol.declarations, ts.isAmbientModule);
                             if (ts.length(ambientDecls)) {
                                 for (var _i = 0, ambientDecls_1 = ambientDecls; _i < ambientDecls_1.length; _i++) {
                                     var decl = ambientDecls_1[_i];
-                                    context.tracker.trackReferencedAmbientModule(decl); // TODO: GH#18217
+                                    context.tracker.trackReferencedAmbientModule(decl);
                                 }
                             }
                         }
-                        // ambient module, just use declaration/symbol name (fallthrough)
                     }
                     else {
                         var contextFile = ts.getSourceFileOfNode(ts.getOriginalNode(context.enclosingDeclaration));
@@ -32694,26 +26786,26 @@ var ts;
                 if (name) {
                     return ts.declarationNameToString(name);
                 }
-                if (declaration.parent && declaration.parent.kind === 232 /* VariableDeclaration */) {
+                if (declaration.parent && declaration.parent.kind === 232) {
                     return ts.declarationNameToString(declaration.parent.name);
                 }
-                if (context && !context.encounteredError && !(context.flags & 131072 /* AllowAnonymousIdentifier */)) {
+                if (context && !context.encounteredError && !(context.flags & 131072)) {
                     context.encounteredError = true;
                 }
                 switch (declaration.kind) {
-                    case 205 /* ClassExpression */:
+                    case 205:
                         return "(Anonymous class)";
-                    case 192 /* FunctionExpression */:
-                    case 193 /* ArrowFunction */:
+                    case 192:
+                    case 193:
                         return "(Anonymous function)";
                 }
             }
             var nameType = symbol.nameType;
             if (nameType) {
-                if (nameType.flags & 64 /* StringLiteral */ && !ts.isIdentifierText(nameType.value, compilerOptions.target)) {
-                    return "\"" + ts.escapeString(nameType.value, 34 /* doubleQuote */) + "\"";
+                if (nameType.flags & 64 && !ts.isIdentifierText(nameType.value, compilerOptions.target)) {
+                    return "\"" + ts.escapeString(nameType.value, 34) + "\"";
                 }
-                if (nameType && nameType.flags & 2048 /* UniqueESSymbol */) {
+                if (nameType && nameType.flags & 2048) {
                     return "[" + getNameOfSymbolAsWritten(nameType.symbol, context) + "]";
                 }
             }
@@ -32730,81 +26822,66 @@ var ts;
             return false;
             function determineIfDeclarationIsVisible() {
                 switch (node.kind) {
-                    case 292 /* JSDocCallbackTag */:
-                    case 297 /* JSDocTypedefTag */:
-                        // Top-level jsdoc type aliases are considered exported
-                        // First parent is comment node, second is hosting declaration or token; we only care about those tokens or declarations whose parent is a source file
+                    case 292:
+                    case 297:
                         return !!(node.parent && node.parent.parent && node.parent.parent.parent && ts.isSourceFile(node.parent.parent.parent));
-                    case 182 /* BindingElement */:
+                    case 182:
                         return isDeclarationVisible(node.parent.parent);
-                    case 232 /* VariableDeclaration */:
+                    case 232:
                         if (ts.isBindingPattern(node.name) &&
                             !node.name.elements.length) {
-                            // If the binding pattern is empty, this variable declaration is not visible
                             return false;
                         }
-                    // falls through
-                    case 239 /* ModuleDeclaration */:
-                    case 235 /* ClassDeclaration */:
-                    case 236 /* InterfaceDeclaration */:
-                    case 237 /* TypeAliasDeclaration */:
-                    case 234 /* FunctionDeclaration */:
-                    case 238 /* EnumDeclaration */:
-                    case 243 /* ImportEqualsDeclaration */:
-                        // external module augmentation is always visible
+                    case 239:
+                    case 235:
+                    case 236:
+                    case 237:
+                    case 234:
+                    case 238:
+                    case 243:
                         if (ts.isExternalModuleAugmentation(node)) {
                             return true;
                         }
                         var parent = getDeclarationContainer(node);
-                        // If the node is not exported or it is not ambient module element (except import declaration)
-                        if (!(ts.getCombinedModifierFlags(node) & 1 /* Export */) &&
-                            !(node.kind !== 243 /* ImportEqualsDeclaration */ && parent.kind !== 274 /* SourceFile */ && parent.flags & 4194304 /* Ambient */)) {
+                        if (!(ts.getCombinedModifierFlags(node) & 1) &&
+                            !(node.kind !== 243 && parent.kind !== 274 && parent.flags & 4194304)) {
                             return isGlobalSourceFile(parent);
                         }
-                        // Exported members/ambient module elements (exception import declaration) are visible if parent is visible
                         return isDeclarationVisible(parent);
-                    case 152 /* PropertyDeclaration */:
-                    case 151 /* PropertySignature */:
-                    case 156 /* GetAccessor */:
-                    case 157 /* SetAccessor */:
-                    case 154 /* MethodDeclaration */:
-                    case 153 /* MethodSignature */:
-                        if (ts.hasModifier(node, 8 /* Private */ | 16 /* Protected */)) {
-                            // Private/protected properties/methods are not visible
+                    case 152:
+                    case 151:
+                    case 156:
+                    case 157:
+                    case 154:
+                    case 153:
+                        if (ts.hasModifier(node, 8 | 16)) {
                             return false;
                         }
-                    // Public properties/methods are visible if its parents are visible, so:
-                    // falls through
-                    case 155 /* Constructor */:
-                    case 159 /* ConstructSignature */:
-                    case 158 /* CallSignature */:
-                    case 160 /* IndexSignature */:
-                    case 149 /* Parameter */:
-                    case 240 /* ModuleBlock */:
-                    case 163 /* FunctionType */:
-                    case 164 /* ConstructorType */:
-                    case 166 /* TypeLiteral */:
-                    case 162 /* TypeReference */:
-                    case 167 /* ArrayType */:
-                    case 168 /* TupleType */:
-                    case 169 /* UnionType */:
-                    case 170 /* IntersectionType */:
-                    case 173 /* ParenthesizedType */:
+                    case 155:
+                    case 159:
+                    case 158:
+                    case 160:
+                    case 149:
+                    case 240:
+                    case 163:
+                    case 164:
+                    case 166:
+                    case 162:
+                    case 167:
+                    case 168:
+                    case 169:
+                    case 170:
+                    case 173:
                         return isDeclarationVisible(node.parent);
-                    // Default binding, import specifier and namespace import is visible
-                    // only on demand so by default it is not visible
-                    case 245 /* ImportClause */:
-                    case 246 /* NamespaceImport */:
-                    case 248 /* ImportSpecifier */:
+                    case 245:
+                    case 246:
+                    case 248:
                         return false;
-                    // Type parameters are always visible
-                    case 148 /* TypeParameter */:
-                    // Source file and namespace export are always visible
-                    case 274 /* SourceFile */:
-                    case 242 /* NamespaceExportDeclaration */:
+                    case 148:
+                    case 274:
+                    case 242:
                         return true;
-                    // Export assignments do not create name bindings outside the module
-                    case 249 /* ExportAssignment */:
+                    case 249:
                         return false;
                     default:
                         return false;
@@ -32813,11 +26890,11 @@ var ts;
         }
         function collectLinkedAliases(node, setVisibility) {
             var exportSymbol;
-            if (node.parent && node.parent.kind === 249 /* ExportAssignment */) {
-                exportSymbol = resolveName(node, node.escapedText, 67216319 /* Value */ | 67901928 /* Type */ | 1920 /* Namespace */ | 2097152 /* Alias */, /*nameNotFoundMessage*/ undefined, node, /*isUse*/ false);
+            if (node.parent && node.parent.kind === 249) {
+                exportSymbol = resolveName(node, node.escapedText, 67216319 | 67901928 | 1920 | 2097152, undefined, node, false);
             }
-            else if (node.parent.kind === 252 /* ExportSpecifier */) {
-                exportSymbol = getTargetOfExportSpecifier(node.parent, 67216319 /* Value */ | 67901928 /* Type */ | 1920 /* Namespace */ | 2097152 /* Alias */);
+            else if (node.parent.kind === 252) {
+                exportSymbol = getTargetOfExportSpecifier(node.parent, 67216319 | 67901928 | 1920 | 2097152);
             }
             var result;
             if (exportSymbol) {
@@ -32835,10 +26912,9 @@ var ts;
                         ts.pushIfUnique(result, resultNode);
                     }
                     if (ts.isInternalModuleImportEqualsDeclaration(declaration)) {
-                        // Add the referenced top container visible
                         var internalModuleReference = declaration.moduleReference;
                         var firstIdentifier = getFirstIdentifier(internalModuleReference);
-                        var importSymbol = resolveName(declaration, firstIdentifier.escapedText, 67216319 /* Value */ | 67901928 /* Type */ | 1920 /* Namespace */, undefined, undefined, /*isUse*/ false);
+                        var importSymbol = resolveName(declaration, firstIdentifier.escapedText, 67216319 | 67901928 | 1920, undefined, undefined, false);
                         if (importSymbol) {
                             buildVisibleNodeList(importSymbol.declarations);
                         }
@@ -32846,21 +26922,9 @@ var ts;
                 });
             }
         }
-        /**
-         * Push an entry on the type resolution stack. If an entry with the given target and the given property name
-         * is already on the stack, and no entries in between already have a type, then a circularity has occurred.
-         * In this case, the result values of the existing entry and all entries pushed after it are changed to false,
-         * and the value false is returned. Otherwise, the new entry is just pushed onto the stack, and true is returned.
-         * In order to see if the same query has already been done before, the target object and the propertyName both
-         * must match the one passed in.
-         *
-         * @param target The symbol, type, or signature whose type is being queried
-         * @param propertyName The property name that should be used to query the target for its type
-         */
         function pushTypeResolution(target, propertyName) {
             var resolutionCycleStartIndex = findResolutionCycleStartIndex(target, propertyName);
             if (resolutionCycleStartIndex >= 0) {
-                // A cycle was found
                 var length_2 = resolutionTargets.length;
                 for (var i = resolutionCycleStartIndex; i < length_2; i++) {
                     resolutionResults[i] = false;
@@ -32868,7 +26932,7 @@ var ts;
                 return false;
             }
             resolutionTargets.push(target);
-            resolutionResults.push(/*items*/ true);
+            resolutionResults.push(true);
             resolutionPropertyNames.push(propertyName);
             return true;
         }
@@ -32884,26 +26948,24 @@ var ts;
             return -1;
         }
         function hasType(target, propertyName) {
-            if (propertyName === 0 /* Type */) {
+            if (propertyName === 0) {
                 return !!getSymbolLinks(target).type;
             }
-            if (propertyName === 2 /* DeclaredType */) {
+            if (propertyName === 2) {
                 return !!getSymbolLinks(target).declaredType;
             }
-            if (propertyName === 1 /* ResolvedBaseConstructorType */) {
+            if (propertyName === 1) {
                 return !!target.resolvedBaseConstructorType;
             }
-            if (propertyName === 3 /* ResolvedReturnType */) {
+            if (propertyName === 3) {
                 return !!target.resolvedReturnType;
             }
-            if (propertyName === 4 /* ResolvedBaseConstraint */) {
+            if (propertyName === 4) {
                 var bc = target.resolvedBaseConstraint;
                 return !!bc && bc !== circularConstraintType;
             }
             return ts.Debug.fail("Unhandled TypeSystemPropertyName " + propertyName);
         }
-        // Pop an entry from the type resolution stack and return its associated result value. The result value will
-        // be true if no circularities were detected, or false if a circularity was found.
         function popTypeResolution() {
             resolutionTargets.pop();
             resolutionPropertyNames.pop();
@@ -32912,12 +26974,12 @@ var ts;
         function getDeclarationContainer(node) {
             return ts.findAncestor(ts.getRootDeclaration(node), function (node) {
                 switch (node.kind) {
-                    case 232 /* VariableDeclaration */:
-                    case 233 /* VariableDeclarationList */:
-                    case 248 /* ImportSpecifier */:
-                    case 247 /* NamedImports */:
-                    case 246 /* NamespaceImport */:
-                    case 245 /* ImportClause */:
+                    case 232:
+                    case 233:
+                    case 248:
+                    case 247:
+                    case 246:
+                    case 245:
                         return false;
                     default:
                         return true;
@@ -32925,36 +26987,29 @@ var ts;
             }).parent;
         }
         function getTypeOfPrototypeProperty(prototype) {
-            // TypeScript 1.0 spec (April 2014): 8.4
-            // Every class automatically contains a static property member named 'prototype',
-            // the type of which is an instantiation of the class type with type Any supplied as a type argument for each type parameter.
-            // It is an error to explicitly declare a static property member with the name 'prototype'.
             var classType = getDeclaredTypeOfSymbol(getParentOfSymbol(prototype));
             return classType.typeParameters ? createTypeReference(classType, ts.map(classType.typeParameters, function (_) { return anyType; })) : classType;
         }
-        // Return the type of the given property in the given type, or undefined if no such property exists
         function getTypeOfPropertyOfType(type, name) {
             var prop = getPropertyOfType(type, name);
             return prop ? getTypeOfSymbol(prop) : undefined;
         }
         function isTypeAny(type) {
-            return type && (type.flags & 1 /* Any */) !== 0;
+            return type && (type.flags & 1) !== 0;
         }
-        // Return the type of a binding element parent. We check SymbolLinks first to see if a type has been
-        // assigned by contextual typing.
         function getTypeForBindingElementParent(node) {
             var symbol = getSymbolOfNode(node);
-            return symbol && getSymbolLinks(symbol).type || getTypeForVariableLikeDeclaration(node, /*includeOptionality*/ false);
+            return symbol && getSymbolLinks(symbol).type || getTypeForVariableLikeDeclaration(node, false);
         }
         function isComputedNonLiteralName(name) {
-            return name.kind === 147 /* ComputedPropertyName */ && !ts.isStringOrNumericLiteral(name.expression);
+            return name.kind === 147 && !ts.isStringOrNumericLiteral(name.expression);
         }
         function getRestType(source, properties, symbol) {
-            source = filterType(source, function (t) { return !(t.flags & 24576 /* Nullable */); });
-            if (source.flags & 32768 /* Never */) {
+            source = filterType(source, function (t) { return !(t.flags & 24576); });
+            if (source.flags & 32768) {
                 return emptyObjectType;
             }
-            if (source.flags & 262144 /* Union */) {
+            if (source.flags & 262144) {
                 return mapType(source, function (t) { return getRestType(t, properties, symbol); });
             }
             var members = ts.createSymbolTable();
@@ -32966,27 +27021,22 @@ var ts;
             for (var _a = 0, _b = getPropertiesOfType(source); _a < _b.length; _a++) {
                 var prop = _b[_a];
                 var inNamesToRemove = names.has(prop.escapedName);
-                var isPrivate = ts.getDeclarationModifierFlagsFromSymbol(prop) & (8 /* Private */ | 16 /* Protected */);
-                var isSetOnlyAccessor = prop.flags & 65536 /* SetAccessor */ && !(prop.flags & 32768 /* GetAccessor */);
+                var isPrivate = ts.getDeclarationModifierFlagsFromSymbol(prop) & (8 | 16);
+                var isSetOnlyAccessor = prop.flags & 65536 && !(prop.flags & 32768);
                 if (!inNamesToRemove && !isPrivate && !isClassMethod(prop) && !isSetOnlyAccessor) {
                     members.set(prop.escapedName, getNonReadonlySymbol(prop));
                 }
             }
-            var stringIndexInfo = getIndexInfoOfType(source, 0 /* String */);
-            var numberIndexInfo = getIndexInfoOfType(source, 1 /* Number */);
+            var stringIndexInfo = getIndexInfoOfType(source, 0);
+            var numberIndexInfo = getIndexInfoOfType(source, 1);
             return createAnonymousType(symbol, members, ts.emptyArray, ts.emptyArray, stringIndexInfo, numberIndexInfo);
         }
-        /** Return the inferred type for a binding element */
         function getTypeForBindingElement(declaration) {
             var pattern = declaration.parent;
             var parentType = getTypeForBindingElementParent(pattern.parent);
-            // If parent has the unknown (error) type, then so does this binding element
             if (parentType === errorType) {
                 return errorType;
             }
-            // If no type was specified or inferred for parent,
-            // infer from the initializer of the binding element if one is present.
-            // Otherwise, go with the undefined type of the parent.
             if (!parentType) {
                 return declaration.initializer ? checkDeclarationInitializer(declaration) : parentType;
             }
@@ -32994,9 +27044,9 @@ var ts;
                 return parentType;
             }
             var type;
-            if (pattern.kind === 180 /* ObjectBindingPattern */) {
+            if (pattern.kind === 180) {
                 if (declaration.dotDotDotToken) {
-                    if (parentType.flags & 2 /* Unknown */ || !isValidSpreadType(parentType)) {
+                    if (parentType.flags & 2 || !isValidSpreadType(parentType)) {
                         error(declaration, ts.Diagnostics.Rest_types_may_only_be_created_from_object_types);
                         return errorType;
                     }
@@ -33010,21 +27060,20 @@ var ts;
                     type = getRestType(parentType, literalMembers, declaration.symbol);
                 }
                 else {
-                    // Use explicitly specified property name ({ p: xxx } form), or otherwise the implied name ({ p } form)
                     var name = declaration.propertyName || declaration.name;
                     var isLate = isLateBindableName(name);
                     var isWellKnown = ts.isComputedPropertyName(name) && ts.isWellKnownSymbolSyntactically(name.expression);
                     if (!isLate && !isWellKnown && isComputedNonLiteralName(name)) {
                         var exprType = checkExpression(name.expression);
-                        if (isTypeAssignableToKind(exprType, 3072 /* ESSymbolLike */)) {
+                        if (isTypeAssignableToKind(exprType, 3072)) {
                             if (noImplicitAny) {
                                 error(declaration, ts.Diagnostics.Type_0_cannot_be_used_to_index_type_1, typeToString(exprType), typeToString(parentType));
                             }
                             return anyType;
                         }
-                        var indexerType = isTypeAssignableToKind(exprType, 168 /* NumberLike */) && getIndexTypeOfType(parentType, 1 /* Number */) || getIndexTypeOfType(parentType, 0 /* String */);
+                        var indexerType = isTypeAssignableToKind(exprType, 168) && getIndexTypeOfType(parentType, 1) || getIndexTypeOfType(parentType, 0);
                         if (!indexerType && noImplicitAny && !compilerOptions.suppressImplicitAnyIndexErrors) {
-                            if (getIndexTypeOfType(parentType, 1 /* Number */)) {
+                            if (getIndexTypeOfType(parentType, 1)) {
                                 error(declaration, ts.Diagnostics.Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number);
                             }
                             else {
@@ -33033,17 +27082,14 @@ var ts;
                         }
                         return indexerType || anyType;
                     }
-                    // Use type of the specified property, or otherwise, for a numeric name, the type of the numeric index signature,
-                    // or otherwise the type of the string index signature.
                     var nameType = isLate ? checkComputedPropertyName(name) : undefined;
                     var text = isLate ? getLateBoundNameFromType(nameType) :
                         isWellKnown ? ts.getPropertyNameForKnownSymbolName(ts.idText(name.expression.name)) :
                             ts.getTextOfPropertyName(name);
-                    // Relax null check on ambient destructuring parameters, since the parameters have no implementation and are just documentation
-                    if (strictNullChecks && declaration.flags & 4194304 /* Ambient */ && ts.isParameterDeclaration(declaration)) {
+                    if (strictNullChecks && declaration.flags & 4194304 && ts.isParameterDeclaration(declaration)) {
                         parentType = getNonNullableType(parentType);
                     }
-                    if (isLate && nameType && !getPropertyOfType(parentType, text) && isTypeAssignableToKind(nameType, 3072 /* ESSymbolLike */)) {
+                    if (isLate && nameType && !getPropertyOfType(parentType, text) && isTypeAssignableToKind(nameType, 3072)) {
                         if (noImplicitAny) {
                             error(declaration, ts.Diagnostics.Type_0_cannot_be_used_to_index_type_1, typeToString(nameType), typeToString(parentType));
                         }
@@ -33051,8 +27097,8 @@ var ts;
                     }
                     var declaredType = getConstraintForLocation(getTypeOfPropertyOfType(parentType, text), declaration.name);
                     type = declaredType && getFlowTypeOfReference(declaration, declaredType) ||
-                        isNumericLiteralName(text) && getIndexTypeOfType(parentType, 1 /* Number */) ||
-                        getIndexTypeOfType(parentType, 0 /* String */);
+                        isNumericLiteralName(text) && getIndexTypeOfType(parentType, 1) ||
+                        getIndexTypeOfType(parentType, 0);
                     if (!type) {
                         error(name, ts.Diagnostics.Type_0_has_no_property_1_and_no_string_index_signature, typeToString(parentType), ts.declarationNameToString(name));
                         return errorType;
@@ -33060,16 +27106,11 @@ var ts;
                 }
             }
             else {
-                // This elementType will be used if the specific property corresponding to this index is not
-                // present (aka the tuple element property). This call also checks that the parentType is in
-                // fact an iterable or array (depending on target language).
-                var elementType = checkIteratedTypeOrElementType(parentType, pattern, /*allowStringInput*/ false, /*allowAsyncIterables*/ false);
+                var elementType = checkIteratedTypeOrElementType(parentType, pattern, false, false);
                 if (declaration.dotDotDotToken) {
-                    // Rest element has an array type with the same element type as the parent type
                     type = createArrayType(elementType);
                 }
                 else {
-                    // Use specific property type when parent is a tuple or numeric index type when parent is an array
                     var propName = "" + pattern.elements.indexOf(declaration);
                     type = isTupleLikeType(parentType)
                         ? getTypeOfPropertyOfType(parentType, propName)
@@ -33085,13 +27126,11 @@ var ts;
                     }
                 }
             }
-            // In strict null checking mode, if a default value of a non-undefined type is specified, remove
-            // undefined from the final type.
-            if (strictNullChecks && declaration.initializer && !(getFalsyFlags(checkExpressionCached(declaration.initializer)) & 8192 /* Undefined */)) {
-                type = getTypeWithFacts(type, 131072 /* NEUndefined */);
+            if (strictNullChecks && declaration.initializer && !(getFalsyFlags(checkExpressionCached(declaration.initializer)) & 8192)) {
+                type = getTypeWithFacts(type, 131072);
             }
             return declaration.initializer ?
-                getUnionType([type, checkExpressionCached(declaration.initializer)], 2 /* Subtype */) :
+                getUnionType([type, checkExpressionCached(declaration.initializer)], 2) :
                 type;
         }
         function getTypeForDeclarationFromJSDocComment(declaration) {
@@ -33103,29 +27142,22 @@ var ts;
         }
         function isNullOrUndefined(node) {
             var expr = ts.skipParentheses(node);
-            return expr.kind === 95 /* NullKeyword */ || expr.kind === 71 /* Identifier */ && getResolvedSymbol(expr) === undefinedSymbol;
+            return expr.kind === 95 || expr.kind === 71 && getResolvedSymbol(expr) === undefinedSymbol;
         }
         function isEmptyArrayLiteral(node) {
             var expr = ts.skipParentheses(node);
-            return expr.kind === 183 /* ArrayLiteralExpression */ && expr.elements.length === 0;
+            return expr.kind === 183 && expr.elements.length === 0;
         }
         function addOptionality(type, optional) {
             if (optional === void 0) { optional = true; }
             return strictNullChecks && optional ? getOptionalType(type) : type;
         }
-        // Return the inferred type for a variable, parameter, or property declaration
         function getTypeForVariableLikeDeclaration(declaration, includeOptionality) {
-            // A variable declared in a for..in statement is of type string, or of type keyof T when the
-            // right hand expression is of a type parameter type.
-            if (ts.isVariableDeclaration(declaration) && declaration.parent.parent.kind === 221 /* ForInStatement */) {
+            if (ts.isVariableDeclaration(declaration) && declaration.parent.parent.kind === 221) {
                 var indexType = getIndexType(checkNonNullExpression(declaration.parent.parent.expression));
-                return indexType.flags & (65536 /* TypeParameter */ | 1048576 /* Index */) ? getExtractStringType(indexType) : stringType;
+                return indexType.flags & (65536 | 1048576) ? getExtractStringType(indexType) : stringType;
             }
-            if (ts.isVariableDeclaration(declaration) && declaration.parent.parent.kind === 222 /* ForOfStatement */) {
-                // checkRightHandSideOfForOf will return undefined if the for-of expression type was
-                // missing properties/signatures required to get its iteratedType (like
-                // [Symbol.iterator] or next). This may be because we accessed properties from anyType,
-                // or it may have led to an error inside getElementTypeOfIterable.
+            if (ts.isVariableDeclaration(declaration) && declaration.parent.parent.kind === 222) {
                 var forOfStatement = declaration.parent.parent;
                 return checkRightHandSideOfForOf(forOfStatement.expression, forOfStatement.awaitModifier) || anyType;
             }
@@ -33134,43 +27166,34 @@ var ts;
             }
             var isOptional = includeOptionality && (ts.isParameter(declaration) && isJSDocOptionalParameter(declaration)
                 || !ts.isBindingElement(declaration) && !ts.isVariableDeclaration(declaration) && !!declaration.questionToken);
-            // Use type from type annotation if one is present
             var declaredType = tryGetTypeFromEffectiveTypeNode(declaration);
             if (declaredType) {
                 return addOptionality(declaredType, isOptional);
             }
             if ((noImplicitAny || ts.isInJavaScriptFile(declaration)) &&
-                declaration.kind === 232 /* VariableDeclaration */ && !ts.isBindingPattern(declaration.name) &&
-                !(ts.getCombinedModifierFlags(declaration) & 1 /* Export */) && !(declaration.flags & 4194304 /* Ambient */)) {
-                // If --noImplicitAny is on or the declaration is in a Javascript file,
-                // use control flow tracked 'any' type for non-ambient, non-exported var or let variables with no
-                // initializer or a 'null' or 'undefined' initializer.
-                if (!(ts.getCombinedNodeFlags(declaration) & 2 /* Const */) && (!declaration.initializer || isNullOrUndefined(declaration.initializer))) {
+                declaration.kind === 232 && !ts.isBindingPattern(declaration.name) &&
+                !(ts.getCombinedModifierFlags(declaration) & 1) && !(declaration.flags & 4194304)) {
+                if (!(ts.getCombinedNodeFlags(declaration) & 2) && (!declaration.initializer || isNullOrUndefined(declaration.initializer))) {
                     return autoType;
                 }
-                // Use control flow tracked 'any[]' type for non-ambient, non-exported variables with an empty array
-                // literal initializer.
                 if (declaration.initializer && isEmptyArrayLiteral(declaration.initializer)) {
                     return autoArrayType;
                 }
             }
-            if (declaration.kind === 149 /* Parameter */) {
+            if (declaration.kind === 149) {
                 var func = declaration.parent;
-                // For a parameter of a set accessor, use the type of the get accessor if one is present
-                if (func.kind === 157 /* SetAccessor */ && !hasNonBindableDynamicName(func)) {
-                    var getter = ts.getDeclarationOfKind(getSymbolOfNode(declaration.parent), 156 /* GetAccessor */);
+                if (func.kind === 157 && !hasNonBindableDynamicName(func)) {
+                    var getter = ts.getDeclarationOfKind(getSymbolOfNode(declaration.parent), 156);
                     if (getter) {
                         var getterSignature = getSignatureFromDeclaration(getter);
                         var thisParameter = getAccessorThisParameter(func);
                         if (thisParameter && declaration === thisParameter) {
-                            // Use the type from the *getter*
                             ts.Debug.assert(!thisParameter.type);
                             return getTypeOfSymbol(getterSignature.thisParameter);
                         }
                         return getReturnTypeOfSignature(getterSignature);
                     }
                 }
-                // Use contextual parameter type if one is available
                 var type = void 0;
                 if (declaration.symbol.escapedName === "this") {
                     type = getContextualThisParameterType(func);
@@ -33182,25 +27205,19 @@ var ts;
                     return addOptionality(type, isOptional);
                 }
             }
-            // Use the type of the initializer expression if one is present
             if (declaration.initializer) {
                 var type = checkDeclarationInitializer(declaration);
                 return addOptionality(type, isOptional);
             }
             if (ts.isJsxAttribute(declaration)) {
-                // if JSX attribute doesn't have initializer, by default the attribute will have boolean value of true.
-                // I.e <Elem attr /> is sugar for <Elem attr={true} />
                 return trueType;
             }
-            // If the declaration specifies a binding pattern, use the type implied by the binding pattern
             if (ts.isBindingPattern(declaration.name)) {
-                return getTypeFromBindingPattern(declaration.name, /*includePatternInType*/ false, /*reportErrors*/ true);
+                return getTypeFromBindingPattern(declaration.name, false, true);
             }
-            // No type specified and nothing can be inferred
             return undefined;
         }
         function getWidenedTypeFromJSSpecialPropertyDeclarations(symbol) {
-            // function/class/{} assignments are fresh declarations, not property assignments, so only add prototype assignments
             var specialDeclaration = ts.getAssignedJavascriptInitializer(symbol.valueDeclaration);
             if (specialDeclaration) {
                 return getWidenedLiteralType(checkExpressionCached(specialDeclaration));
@@ -33210,22 +27227,20 @@ var ts;
             var definedInConstructor = false;
             var definedInMethod = false;
             var jsDocType;
-            var _loop_1 = function (declaration) {
+            var _loop_4 = function (declaration) {
                 var declarationInConstructor = false;
-                var expression = declaration.kind === 200 /* BinaryExpression */ ? declaration :
-                    declaration.kind === 185 /* PropertyAccessExpression */ ? ts.cast(declaration.parent, ts.isBinaryExpression) :
+                var expression = declaration.kind === 200 ? declaration :
+                    declaration.kind === 185 ? ts.cast(declaration.parent, ts.isBinaryExpression) :
                         undefined;
                 if (!expression) {
                     return { value: errorType };
                 }
                 var special = ts.getSpecialPropertyAssignmentKind(expression);
-                if (special === 4 /* ThisProperty */) {
-                    var thisContainer = ts.getThisContainer(expression, /*includeArrowFunctions*/ false);
-                    // Properties defined in a constructor (or base constructor, or javascript constructor function) don't get undefined added.
-                    // Function expressions that are assigned to the prototype count as methods.
-                    declarationInConstructor = thisContainer.kind === 155 /* Constructor */ ||
-                        thisContainer.kind === 234 /* FunctionDeclaration */ ||
-                        (thisContainer.kind === 192 /* FunctionExpression */ && !ts.isPrototypePropertyAssignment(thisContainer.parent));
+                if (special === 4) {
+                    var thisContainer = ts.getThisContainer(expression, false);
+                    declarationInConstructor = thisContainer.kind === 155 ||
+                        thisContainer.kind === 234 ||
+                        (thisContainer.kind === 192 && !ts.isPrototypePropertyAssignment(thisContainer.parent));
                     if (declarationInConstructor) {
                         definedInConstructor = true;
                     }
@@ -33233,7 +27248,6 @@ var ts;
                         definedInMethod = true;
                     }
                 }
-                // If there is a JSDoc type, use it
                 var type_1 = getTypeForDeclarationFromJSDocComment(expression.parent);
                 if (type_1) {
                     var declarationType = getWidenedType(type_1);
@@ -33242,31 +27256,30 @@ var ts;
                     }
                     else if (jsDocType !== errorType && declarationType !== errorType &&
                         !isTypeIdenticalTo(jsDocType, declarationType) &&
-                        !(symbol.flags & 67108864 /* JSContainer */)) {
+                        !(symbol.flags & 67108864)) {
                         errorNextVariableOrPropertyDeclarationMustHaveSameType(jsDocType, declaration, declarationType);
                     }
                 }
                 else if (!jsDocType) {
-                    // If we don't have an explicit JSDoc type, get the type from the expression.
                     var type_2 = getWidenedLiteralType(checkExpressionCached(expression.right));
-                    if (ts.getObjectFlags(type_2) & 16 /* Anonymous */ &&
-                        special === 2 /* ModuleExports */ &&
-                        symbol.escapedName === "export=" /* ExportEquals */) {
+                    if (ts.getObjectFlags(type_2) & 16 &&
+                        special === 2 &&
+                        symbol.escapedName === "export=") {
                         var exportedType_1 = resolveStructuredTypeMembers(type_2);
-                        var members_2 = ts.createSymbolTable();
-                        ts.copyEntries(exportedType_1.members, members_2);
+                        var members_3 = ts.createSymbolTable();
+                        ts.copyEntries(exportedType_1.members, members_3);
                         symbol.exports.forEach(function (s, name) {
-                            if (members_2.has(name)) {
+                            if (members_3.has(name)) {
                                 var exportedMember = exportedType_1.members.get(name);
                                 var union = createSymbol(s.flags | exportedMember.flags, name);
                                 union.type = getUnionType([getTypeOfSymbol(s), getTypeOfSymbol(exportedMember)]);
-                                members_2.set(name, union);
+                                members_3.set(name, union);
                             }
                             else {
-                                members_2.set(name, s);
+                                members_3.set(name, s);
                             }
                         });
-                        type_2 = createAnonymousType(exportedType_1.symbol, members_2, exportedType_1.callSignatures, exportedType_1.constructSignatures, exportedType_1.stringIndexInfo, exportedType_1.numberIndexInfo);
+                        type_2 = createAnonymousType(exportedType_1.symbol, members_3, exportedType_1.callSignatures, exportedType_1.constructSignatures, exportedType_1.stringIndexInfo, exportedType_1.numberIndexInfo);
                     }
                     var anyedType = type_2;
                     if (isEmptyArrayLiteralType(type_2)) {
@@ -33283,13 +27296,12 @@ var ts;
             };
             for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
                 var declaration = _a[_i];
-                var state_2 = _loop_1(declaration);
+                var state_2 = _loop_4(declaration);
                 if (typeof state_2 === "object")
                     return state_2.value;
             }
             var type = jsDocType;
             if (!type) {
-                // use only the constructor types unless they were only assigned null | undefined (including widening variants)
                 if (definedInMethod) {
                     var propType = getTypeOfSpecialPropertyOfBaseType(symbol);
                     if (propType) {
@@ -33297,11 +27309,11 @@ var ts;
                         definedInConstructor = true;
                     }
                 }
-                var sourceTypes = ts.some(constructorTypes, function (t) { return !!(t.flags & ~(24576 /* Nullable */ | 134217728 /* ContainsWideningType */)); }) ? constructorTypes : types; // TODO: GH#18217
-                type = getUnionType(sourceTypes, 2 /* Subtype */);
+                var sourceTypes = ts.some(constructorTypes, function (t) { return !!(t.flags & ~(24576 | 134217728)); }) ? constructorTypes : types;
+                type = getUnionType(sourceTypes, 2);
             }
             var widened = getWidenedType(addOptionality(type, definedInMethod && !definedInConstructor));
-            if (filterType(widened, function (t) { return !!(t.flags & ~24576 /* Nullable */); }) === neverType) {
+            if (filterType(widened, function (t) { return !!(t.flags & ~24576); }) === neverType) {
                 if (noImplicitAny) {
                     reportImplicitAnyError(symbol.valueDeclaration, anyType);
                 }
@@ -33309,10 +27321,9 @@ var ts;
             }
             return widened;
         }
-        /** check for definition in base class if any declaration is in a class */
         function getTypeOfSpecialPropertyOfBaseType(specialProperty) {
             var parentDeclaration = ts.forEach(specialProperty.declarations, function (d) {
-                var parent = ts.getThisContainer(d, /*includeArrowFunctions*/ false).parent;
+                var parent = ts.getThisContainer(d, false).parent;
                 return ts.isClassLike(parent) && parent;
             });
             if (parentDeclaration) {
@@ -33323,9 +27334,6 @@ var ts;
                 }
             }
         }
-        // Return the type implied by a binding pattern element. This is the type of the initializer of the element if
-        // one is present. Otherwise, if the element is itself a binding pattern, it is the type implied by the binding
-        // pattern. Otherwise, it is the type any.
         function getTypeFromBindingElement(element, includePatternInType, reportErrors) {
             if (element.initializer) {
                 return checkDeclarationInitializer(element);
@@ -33338,45 +27346,41 @@ var ts;
             }
             return anyType;
         }
-        // Return the type implied by an object binding pattern
         function getTypeFromObjectBindingPattern(pattern, includePatternInType, reportErrors) {
             var members = ts.createSymbolTable();
             var stringIndexInfo;
-            var objectFlags = 128 /* ObjectLiteral */;
+            var objectFlags = 128;
             ts.forEach(pattern.elements, function (e) {
                 var name = e.propertyName || e.name;
                 if (isComputedNonLiteralName(name)) {
-                    // do not include computed properties in the implied type
-                    objectFlags |= 512 /* ObjectLiteralPatternWithComputedProperties */;
+                    objectFlags |= 512;
                     return;
                 }
                 if (e.dotDotDotToken) {
-                    stringIndexInfo = createIndexInfo(anyType, /*isReadonly*/ false);
+                    stringIndexInfo = createIndexInfo(anyType, false);
                     return;
                 }
                 var text = ts.getTextOfPropertyName(name);
-                var flags = 4 /* Property */ | (e.initializer ? 16777216 /* Optional */ : 0);
+                var flags = 4 | (e.initializer ? 16777216 : 0);
                 var symbol = createSymbol(flags, text);
                 symbol.type = getTypeFromBindingElement(e, includePatternInType, reportErrors);
                 symbol.bindingElement = e;
                 members.set(symbol.escapedName, symbol);
             });
             var result = createAnonymousType(undefined, members, ts.emptyArray, ts.emptyArray, stringIndexInfo, undefined);
-            result.flags |= 268435456 /* ContainsObjectLiteral */;
+            result.flags |= 268435456;
             result.objectFlags |= objectFlags;
             if (includePatternInType) {
                 result.pattern = pattern;
             }
             return result;
         }
-        // Return the type implied by an array binding pattern
         function getTypeFromArrayBindingPattern(pattern, includePatternInType, reportErrors) {
             var elements = pattern.elements;
             var lastElement = ts.lastOrUndefined(elements);
             if (!lastElement || (!ts.isOmittedExpression(lastElement) && lastElement.dotDotDotToken)) {
-                return languageVersion >= 2 /* ES2015 */ ? createIterableType(anyType) : anyArrayType;
+                return languageVersion >= 2 ? createIterableType(anyType) : anyArrayType;
             }
-            // If the pattern has at least one element, and no rest element, then it should imply a tuple type.
             var elementTypes = ts.map(elements, function (e) { return ts.isOmittedExpression(e) ? anyType : getTypeFromBindingElement(e, includePatternInType, reportErrors); });
             var result = createTupleType(elementTypes);
             if (includePatternInType) {
@@ -33385,44 +27389,25 @@ var ts;
             }
             return result;
         }
-        // Return the type implied by a binding pattern. This is the type implied purely by the binding pattern itself
-        // and without regard to its context (i.e. without regard any type annotation or initializer associated with the
-        // declaration in which the binding pattern is contained). For example, the implied type of [x, y] is [any, any]
-        // and the implied type of { x, y: z = 1 } is { x: any; y: number; }. The type implied by a binding pattern is
-        // used as the contextual type of an initializer associated with the binding pattern. Also, for a destructuring
-        // parameter with no type annotation or initializer, the type implied by the binding pattern becomes the type of
-        // the parameter.
         function getTypeFromBindingPattern(pattern, includePatternInType, reportErrors) {
             if (includePatternInType === void 0) { includePatternInType = false; }
             if (reportErrors === void 0) { reportErrors = false; }
-            return pattern.kind === 180 /* ObjectBindingPattern */
+            return pattern.kind === 180
                 ? getTypeFromObjectBindingPattern(pattern, includePatternInType, reportErrors)
                 : getTypeFromArrayBindingPattern(pattern, includePatternInType, reportErrors);
         }
-        // Return the type associated with a variable, parameter, or property declaration. In the simple case this is the type
-        // specified in a type annotation or inferred from an initializer. However, in the case of a destructuring declaration it
-        // is a bit more involved. For example:
-        //
-        //   var [x, s = ""] = [1, "one"];
-        //
-        // Here, the array literal [1, "one"] is contextually typed by the type [any, string], which is the implied type of the
-        // binding pattern [x, s = ""]. Because the contextual type is a tuple type, the resulting type of [1, "one"] is the
-        // tuple type [number, string]. Thus, the type inferred for 'x' is number and the type inferred for 's' is string.
         function getWidenedTypeForVariableLikeDeclaration(declaration, reportErrors) {
-            var type = getTypeForVariableLikeDeclaration(declaration, /*includeOptionality*/ true);
+            var type = getTypeForVariableLikeDeclaration(declaration, true);
             if (type) {
                 if (reportErrors) {
                     reportErrorsFromWidening(declaration, type);
                 }
-                // always widen a 'unique symbol' type if the type was created for a different declaration.
-                if (type.flags & 2048 /* UniqueESSymbol */ && (ts.isBindingElement(declaration) || !declaration.type) && type.symbol !== getSymbolOfNode(declaration)) {
+                if (type.flags & 2048 && (ts.isBindingElement(declaration) || !declaration.type) && type.symbol !== getSymbolOfNode(declaration)) {
                     type = esSymbolType;
                 }
                 return getWidenedType(type);
             }
-            // Rest parameters default to type any[], other parameters default to type any
             type = ts.isParameter(declaration) && declaration.dotDotDotToken ? anyArrayType : anyType;
-            // Report implicit any errors unless this is a private property within an ambient declaration
             if (reportErrors && noImplicitAny) {
                 if (!declarationBelongsToPrivateAmbientMember(declaration)) {
                     reportImplicitAnyError(declaration, type);
@@ -33432,7 +27417,7 @@ var ts;
         }
         function declarationBelongsToPrivateAmbientMember(declaration) {
             var root = ts.getRootDeclaration(declaration);
-            var memberDeclaration = root.kind === 149 /* Parameter */ ? root.parent : root;
+            var memberDeclaration = root.kind === 149 ? root.parent : root;
             return isPrivateWithinAmbient(memberDeclaration);
         }
         function tryGetTypeFromEffectiveTypeNode(declaration) {
@@ -33444,42 +27429,32 @@ var ts;
         function getTypeOfVariableOrParameterOrProperty(symbol) {
             var links = getSymbolLinks(symbol);
             if (!links.type) {
-                // Handle prototype property
-                if (symbol.flags & 4194304 /* Prototype */) {
+                if (symbol.flags & 4194304) {
                     return links.type = getTypeOfPrototypeProperty(symbol);
                 }
-                // CommonsJS require and module both have type any.
                 if (symbol === requireSymbol || symbol === moduleSymbol) {
                     return links.type = anyType;
                 }
-                // Handle catch clause variables
                 var declaration = symbol.valueDeclaration;
                 if (ts.isCatchClauseVariableDeclarationOrBindingElement(declaration)) {
                     return links.type = anyType;
                 }
-                // Handle export default expressions
                 if (ts.isSourceFile(declaration)) {
                     var jsonSourceFile = ts.cast(declaration, ts.isJsonSourceFile);
                     return links.type = jsonSourceFile.statements.length ? checkExpression(jsonSourceFile.statements[0].expression) : emptyObjectType;
                 }
-                if (declaration.kind === 249 /* ExportAssignment */) {
+                if (declaration.kind === 249) {
                     return links.type = checkExpression(declaration.expression);
                 }
                 if (ts.isInJavaScriptFile(declaration) && ts.isJSDocPropertyLikeTag(declaration) && declaration.typeExpression) {
                     return links.type = getTypeFromTypeNode(declaration.typeExpression.type);
                 }
-                // Handle variable, parameter or property
-                if (!pushTypeResolution(symbol, 0 /* Type */)) {
+                if (!pushTypeResolution(symbol, 0)) {
                     return errorType;
                 }
                 var type = void 0;
-                // Handle certain special assignment kinds, which happen to union across multiple declarations:
-                // * module.exports = expr
-                // * exports.p = expr
-                // * this.p = expr
-                // * className.prototype.method = expr
-                if (declaration.kind === 200 /* BinaryExpression */ ||
-                    declaration.kind === 185 /* PropertyAccessExpression */ && declaration.parent.kind === 200 /* BinaryExpression */) {
+                if (declaration.kind === 200 ||
+                    declaration.kind === 185 && declaration.parent.kind === 200) {
                     type = getWidenedTypeFromJSSpecialPropertyDeclarations(symbol);
                 }
                 else if (ts.isJSDocPropertyLikeTag(declaration)
@@ -33489,8 +27464,7 @@ var ts;
                     || ts.isFunctionDeclaration(declaration)
                     || (ts.isMethodDeclaration(declaration) && !ts.isObjectLiteralMethod(declaration))
                     || ts.isMethodSignature(declaration)) {
-                    // Symbol is property of some kind that is merged with something - should use `getTypeOfFuncClassEnumModule` and not `getTypeOfVariableOrParameterOrProperty`
-                    if (symbol.flags & (16 /* Function */ | 8192 /* Method */ | 32 /* Class */ | 384 /* Enum */ | 512 /* ValueModule */)) {
+                    if (symbol.flags & (16 | 8192 | 32 | 384 | 512)) {
                         return getTypeOfFuncClassEnumModule(symbol);
                     }
                     type = tryGetTypeFromEffectiveTypeNode(declaration) || anyType;
@@ -33502,17 +27476,17 @@ var ts;
                     type = tryGetTypeFromEffectiveTypeNode(declaration) || checkJsxAttribute(declaration);
                 }
                 else if (ts.isShorthandPropertyAssignment(declaration)) {
-                    type = tryGetTypeFromEffectiveTypeNode(declaration) || checkExpressionForMutableLocation(declaration.name, 0 /* Normal */);
+                    type = tryGetTypeFromEffectiveTypeNode(declaration) || checkExpressionForMutableLocation(declaration.name, 0);
                 }
                 else if (ts.isObjectLiteralMethod(declaration)) {
-                    type = tryGetTypeFromEffectiveTypeNode(declaration) || checkObjectLiteralMethod(declaration, 0 /* Normal */);
+                    type = tryGetTypeFromEffectiveTypeNode(declaration) || checkObjectLiteralMethod(declaration, 0);
                 }
                 else if (ts.isParameter(declaration)
                     || ts.isPropertyDeclaration(declaration)
                     || ts.isPropertySignature(declaration)
                     || ts.isVariableDeclaration(declaration)
                     || ts.isBindingElement(declaration)) {
-                    type = getWidenedTypeForVariableLikeDeclaration(declaration, /*reportErrors*/ true);
+                    type = getWidenedTypeForVariableLikeDeclaration(declaration, true);
                 }
                 else {
                     return ts.Debug.fail("Unhandled declaration kind! " + ts.Debug.showSyntaxKind(declaration) + " for " + ts.Debug.showSymbol(symbol));
@@ -33526,7 +27500,7 @@ var ts;
         }
         function getAnnotatedAccessorType(accessor) {
             if (accessor) {
-                if (accessor.kind === 156 /* GetAccessor */) {
+                if (accessor.kind === 156) {
                     var getterTypeAnnotation = ts.getEffectiveReturnTypeNode(accessor);
                     return getterTypeAnnotation && getTypeFromTypeNode(getterTypeAnnotation);
                 }
@@ -33547,35 +27521,31 @@ var ts;
         function getTypeOfAccessors(symbol) {
             var links = getSymbolLinks(symbol);
             if (!links.type) {
-                var getter = ts.getDeclarationOfKind(symbol, 156 /* GetAccessor */);
-                var setter = ts.getDeclarationOfKind(symbol, 157 /* SetAccessor */);
+                var getter = ts.getDeclarationOfKind(symbol, 156);
+                var setter = ts.getDeclarationOfKind(symbol, 157);
                 if (getter && ts.isInJavaScriptFile(getter)) {
                     var jsDocType = getTypeForDeclarationFromJSDocComment(getter);
                     if (jsDocType) {
                         return links.type = jsDocType;
                     }
                 }
-                if (!pushTypeResolution(symbol, 0 /* Type */)) {
+                if (!pushTypeResolution(symbol, 0)) {
                     return errorType;
                 }
                 var type = void 0;
-                // First try to see if the user specified a return type on the get-accessor.
                 var getterReturnType = getAnnotatedAccessorType(getter);
                 if (getterReturnType) {
                     type = getterReturnType;
                 }
                 else {
-                    // If the user didn't specify a return type, try to use the set-accessor's parameter type.
                     var setterParameterType = getAnnotatedAccessorType(setter);
                     if (setterParameterType) {
                         type = setterParameterType;
                     }
                     else {
-                        // If there are no specified types, try to infer it from the body of the get accessor if it exists.
                         if (getter && getter.body) {
                             type = getReturnTypeFromBody(getter);
                         }
-                        // Otherwise, fall back to 'any'.
                         else {
                             if (noImplicitAny) {
                                 if (setter) {
@@ -33593,7 +27563,7 @@ var ts;
                 if (!popTypeResolution()) {
                     type = anyType;
                     if (noImplicitAny) {
-                        var getter_1 = ts.getDeclarationOfKind(symbol, 156 /* GetAccessor */);
+                        var getter_1 = ts.getDeclarationOfKind(symbol, 156);
                         error(getter_1, ts.Diagnostics._0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions, symbolToString(symbol));
                     }
                 }
@@ -33603,7 +27573,7 @@ var ts;
         }
         function getBaseTypeVariableOfClass(symbol) {
             var baseConstructorType = getBaseConstructorTypeOfClass(getDeclaredTypeOfClassOrInterface(symbol));
-            return baseConstructorType.flags & 2162688 /* TypeVariable */ ? baseConstructorType : undefined;
+            return baseConstructorType.flags & 2162688 ? baseConstructorType : undefined;
         }
         function getTypeOfFuncClassEnumModule(symbol) {
             var links = getSymbolLinks(symbol);
@@ -33613,7 +27583,6 @@ var ts;
                     var jsSymbol = getSymbolOfNode(jsDeclaration);
                     if (jsSymbol && (ts.hasEntries(jsSymbol.exports) || ts.hasEntries(jsSymbol.members))) {
                         symbol = cloneSymbol(symbol);
-                        // note:we overwrite links because we just cloned the symbol
                         links = symbol;
                         if (ts.hasEntries(jsSymbol.exports)) {
                             symbol.exports = symbol.exports || ts.createSymbolTable();
@@ -33625,21 +27594,21 @@ var ts;
                         }
                     }
                 }
-                if (symbol.flags & 1536 /* Module */ && ts.isShorthandAmbientModuleSymbol(symbol)) {
+                if (symbol.flags & 1536 && ts.isShorthandAmbientModuleSymbol(symbol)) {
                     links.type = anyType;
                 }
-                else if (symbol.valueDeclaration.kind === 200 /* BinaryExpression */ ||
-                    symbol.valueDeclaration.kind === 185 /* PropertyAccessExpression */ && symbol.valueDeclaration.parent.kind === 200 /* BinaryExpression */) {
+                else if (symbol.valueDeclaration.kind === 200 ||
+                    symbol.valueDeclaration.kind === 185 && symbol.valueDeclaration.parent.kind === 200) {
                     links.type = getWidenedTypeFromJSSpecialPropertyDeclarations(symbol);
                 }
                 else {
-                    var type = createObjectType(16 /* Anonymous */, symbol);
-                    if (symbol.flags & 32 /* Class */) {
+                    var type = createObjectType(16, symbol);
+                    if (symbol.flags & 32) {
                         var baseTypeVariable = getBaseTypeVariableOfClass(symbol);
                         links.type = baseTypeVariable ? getIntersectionType([type, baseTypeVariable]) : type;
                     }
                     else {
-                        links.type = strictNullChecks && symbol.flags & 16777216 /* Optional */ ? getOptionalType(type) : type;
+                        links.type = strictNullChecks && symbol.flags & 16777216 ? getOptionalType(type) : type;
                     }
                 }
             }
@@ -33656,12 +27625,7 @@ var ts;
             var links = getSymbolLinks(symbol);
             if (!links.type) {
                 var targetSymbol = resolveAlias(symbol);
-                // It only makes sense to get the type of a value symbol. If the result of resolving
-                // the alias is not a value, then it has no type. To get the type associated with a
-                // type symbol, call getDeclaredTypeOfSymbol.
-                // This check is important because without it, a call to getTypeOfSymbol could end
-                // up recursively calling getTypeOfAlias, causing a stack overflow.
-                links.type = targetSymbol.flags & 67216319 /* Value */
+                links.type = targetSymbol.flags & 67216319
                     ? getTypeOfSymbol(targetSymbol)
                     : errorType;
             }
@@ -33675,7 +27639,7 @@ var ts;
                     links.type = errorType;
                 }
                 else {
-                    if (!pushTypeResolution(symbol, 0 /* Type */)) {
+                    if (!pushTypeResolution(symbol, 0)) {
                         return errorType;
                     }
                     symbolInstantiationDepth++;
@@ -33690,37 +27654,35 @@ var ts;
             return links.type;
         }
         function reportCircularityError(symbol) {
-            // Check if variable has type annotation that circularly references the variable itself
             if (ts.getEffectiveTypeAnnotationNode(symbol.valueDeclaration)) {
                 error(symbol.valueDeclaration, ts.Diagnostics._0_is_referenced_directly_or_indirectly_in_its_own_type_annotation, symbolToString(symbol));
                 return errorType;
             }
-            // Otherwise variable has initializer that circularly references the variable itself
             if (noImplicitAny) {
                 error(symbol.valueDeclaration, ts.Diagnostics._0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or_indirectly_in_its_own_initializer, symbolToString(symbol));
             }
             return anyType;
         }
         function getTypeOfSymbol(symbol) {
-            if (ts.getCheckFlags(symbol) & 1 /* Instantiated */) {
+            if (ts.getCheckFlags(symbol) & 1) {
                 return getTypeOfInstantiatedSymbol(symbol);
             }
-            if (ts.getCheckFlags(symbol) & 2048 /* ReverseMapped */) {
+            if (ts.getCheckFlags(symbol) & 2048) {
                 return getTypeOfReverseMappedSymbol(symbol);
             }
-            if (symbol.flags & (3 /* Variable */ | 4 /* Property */)) {
+            if (symbol.flags & (3 | 4)) {
                 return getTypeOfVariableOrParameterOrProperty(symbol);
             }
-            if (symbol.flags & (16 /* Function */ | 8192 /* Method */ | 32 /* Class */ | 384 /* Enum */ | 512 /* ValueModule */)) {
+            if (symbol.flags & (16 | 8192 | 32 | 384 | 512)) {
                 return getTypeOfFuncClassEnumModule(symbol);
             }
-            if (symbol.flags & 8 /* EnumMember */) {
+            if (symbol.flags & 8) {
                 return getTypeOfEnumMember(symbol);
             }
-            if (symbol.flags & 98304 /* Accessor */) {
+            if (symbol.flags & 98304) {
                 return getTypeOfAccessors(symbol);
             }
-            if (symbol.flags & 2097152 /* Alias */) {
+            if (symbol.flags & 2097152) {
                 return getTypeOfAlias(symbol);
             }
             return errorType;
@@ -33728,92 +27690,84 @@ var ts;
         function isReferenceToType(type, target) {
             return type !== undefined
                 && target !== undefined
-                && (ts.getObjectFlags(type) & 4 /* Reference */) !== 0
+                && (ts.getObjectFlags(type) & 4) !== 0
                 && type.target === target;
         }
         function getTargetType(type) {
-            return ts.getObjectFlags(type) & 4 /* Reference */ ? type.target : type;
+            return ts.getObjectFlags(type) & 4 ? type.target : type;
         }
-        // TODO: GH#18217 If `checkBase` is undefined, we should not call this because this will always return false.
         function hasBaseType(type, checkBase) {
             return check(type);
             function check(type) {
-                if (ts.getObjectFlags(type) & (3 /* ClassOrInterface */ | 4 /* Reference */)) {
+                if (ts.getObjectFlags(type) & (3 | 4)) {
                     var target = getTargetType(type);
                     return target === checkBase || ts.some(getBaseTypes(target), check);
                 }
-                else if (type.flags & 524288 /* Intersection */) {
+                else if (type.flags & 524288) {
                     return ts.some(type.types, check);
                 }
                 return false;
             }
         }
-        // Appends the type parameters given by a list of declarations to a set of type parameters and returns the resulting set.
-        // The function allocates a new array if the input type parameter set is undefined, but otherwise it modifies the set
-        // in-place and returns the same array.
         function appendTypeParameters(typeParameters, declarations) {
-            for (var _i = 0, declarations_1 = declarations; _i < declarations_1.length; _i++) {
-                var declaration = declarations_1[_i];
+            for (var _i = 0, declarations_2 = declarations; _i < declarations_2.length; _i++) {
+                var declaration = declarations_2[_i];
                 typeParameters = ts.appendIfUnique(typeParameters, getDeclaredTypeOfTypeParameter(getSymbolOfNode(declaration)));
             }
             return typeParameters;
         }
-        // Return the outer type parameters of a node or undefined if the node has no outer type parameters.
         function getOuterTypeParameters(node, includeThisTypes) {
             while (true) {
-                node = node.parent; // TODO: GH#18217 Use SourceFile kind check instead
+                node = node.parent;
                 if (!node) {
                     return undefined;
                 }
                 switch (node.kind) {
-                    case 235 /* ClassDeclaration */:
-                    case 205 /* ClassExpression */:
-                    case 236 /* InterfaceDeclaration */:
-                    case 158 /* CallSignature */:
-                    case 159 /* ConstructSignature */:
-                    case 153 /* MethodSignature */:
-                    case 163 /* FunctionType */:
-                    case 164 /* ConstructorType */:
-                    case 284 /* JSDocFunctionType */:
-                    case 234 /* FunctionDeclaration */:
-                    case 154 /* MethodDeclaration */:
-                    case 192 /* FunctionExpression */:
-                    case 193 /* ArrowFunction */:
-                    case 237 /* TypeAliasDeclaration */:
-                    case 296 /* JSDocTemplateTag */:
-                    case 297 /* JSDocTypedefTag */:
-                    case 292 /* JSDocCallbackTag */:
-                    case 177 /* MappedType */:
-                    case 171 /* ConditionalType */:
+                    case 235:
+                    case 205:
+                    case 236:
+                    case 158:
+                    case 159:
+                    case 153:
+                    case 163:
+                    case 164:
+                    case 284:
+                    case 234:
+                    case 154:
+                    case 192:
+                    case 193:
+                    case 237:
+                    case 296:
+                    case 297:
+                    case 292:
+                    case 177:
+                    case 171:
                         var outerTypeParameters = getOuterTypeParameters(node, includeThisTypes);
-                        if (node.kind === 177 /* MappedType */) {
+                        if (node.kind === 177) {
                             return ts.append(outerTypeParameters, getDeclaredTypeOfTypeParameter(getSymbolOfNode(node.typeParameter)));
                         }
-                        else if (node.kind === 171 /* ConditionalType */) {
+                        else if (node.kind === 171) {
                             return ts.concatenate(outerTypeParameters, getInferTypeParameters(node));
                         }
                         var outerAndOwnTypeParameters = appendTypeParameters(outerTypeParameters, ts.getEffectiveTypeParameterDeclarations(node));
                         var thisType = includeThisTypes &&
-                            (node.kind === 235 /* ClassDeclaration */ || node.kind === 205 /* ClassExpression */ || node.kind === 236 /* InterfaceDeclaration */) &&
+                            (node.kind === 235 || node.kind === 205 || node.kind === 236) &&
                             getDeclaredTypeOfClassOrInterface(getSymbolOfNode(node)).thisType;
                         return thisType ? ts.append(outerAndOwnTypeParameters, thisType) : outerAndOwnTypeParameters;
                 }
             }
         }
-        // The outer type parameters are those defined by enclosing generic classes, methods, or functions.
         function getOuterTypeParametersOfClassOrInterface(symbol) {
-            var declaration = symbol.flags & 32 /* Class */ ? symbol.valueDeclaration : ts.getDeclarationOfKind(symbol, 236 /* InterfaceDeclaration */);
+            var declaration = symbol.flags & 32 ? symbol.valueDeclaration : ts.getDeclarationOfKind(symbol, 236);
             return getOuterTypeParameters(declaration);
         }
-        // The local type parameters are the combined set of type parameters from all declarations of the class,
-        // interface, or type alias.
         function getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol) {
             var result;
             for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
                 var node = _a[_i];
-                if (node.kind === 236 /* InterfaceDeclaration */ ||
-                    node.kind === 235 /* ClassDeclaration */ ||
-                    node.kind === 205 /* ClassExpression */ ||
+                if (node.kind === 236 ||
+                    node.kind === 235 ||
+                    node.kind === 205 ||
                     ts.isTypeAlias(node)) {
                     var declaration = node;
                     result = appendTypeParameters(result, ts.getEffectiveTypeParameterDeclarations(declaration));
@@ -33821,15 +27775,11 @@ var ts;
             }
             return result;
         }
-        // The full set of type parameters for a generic class or interface type consists of its outer type parameters plus
-        // its locally declared type parameters.
         function getTypeParametersOfClassOrInterface(symbol) {
             return ts.concatenate(getOuterTypeParametersOfClassOrInterface(symbol), getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol));
         }
-        // A type is a mixin constructor if it has a single construct signature taking no type parameters and a single
-        // rest parameter of type any[].
         function isMixinConstructorType(type) {
-            var signatures = getSignaturesOfType(type, 1 /* Construct */);
+            var signatures = getSignaturesOfType(type, 1);
             if (signatures.length === 1) {
                 var s = signatures[0];
                 return !s.typeParameters && s.parameters.length === 1 && s.hasRestParameter && getTypeOfParameter(s.parameters[0]) === anyArrayType;
@@ -33837,10 +27787,10 @@ var ts;
             return false;
         }
         function isConstructorType(type) {
-            if (isValidBaseType(type) && getSignaturesOfType(type, 1 /* Construct */).length > 0) {
+            if (isValidBaseType(type) && getSignaturesOfType(type, 1).length > 0) {
                 return true;
             }
-            if (type.flags & 2162688 /* TypeVariable */) {
+            if (type.flags & 2162688) {
                 var constraint = getBaseConstraintOfType(type);
                 return !!constraint && isValidBaseType(constraint) && isMixinConstructorType(constraint);
             }
@@ -33849,7 +27799,6 @@ var ts;
         function getBaseTypeNodeOfClass(type) {
             var decl = type.symbol.valueDeclaration;
             if (ts.isInJavaScriptFile(decl)) {
-                // Prefer an @augments tag because it may have type parameters.
                 var tag = ts.getJSDocAugmentsTag(decl);
                 if (tag) {
                     return tag.class;
@@ -33860,21 +27809,13 @@ var ts;
         function getConstructorsForTypeArguments(type, typeArgumentNodes, location) {
             var typeArgCount = ts.length(typeArgumentNodes);
             var isJavaScript = ts.isInJavaScriptFile(location);
-            return ts.filter(getSignaturesOfType(type, 1 /* Construct */), function (sig) { return (isJavaScript || typeArgCount >= getMinTypeArgumentCount(sig.typeParameters)) && typeArgCount <= ts.length(sig.typeParameters); });
+            return ts.filter(getSignaturesOfType(type, 1), function (sig) { return (isJavaScript || typeArgCount >= getMinTypeArgumentCount(sig.typeParameters)) && typeArgCount <= ts.length(sig.typeParameters); });
         }
         function getInstantiatedConstructorsForTypeArguments(type, typeArgumentNodes, location) {
             var signatures = getConstructorsForTypeArguments(type, typeArgumentNodes, location);
             var typeArguments = ts.map(typeArgumentNodes, getTypeFromTypeNode);
             return ts.sameMap(signatures, function (sig) { return ts.some(sig.typeParameters) ? getSignatureInstantiation(sig, typeArguments, ts.isInJavaScriptFile(location)) : sig; });
         }
-        /**
-         * The base constructor of a class can resolve to
-         * * undefinedType if the class has no extends clause,
-         * * unknownType if an error occurred during resolution of the extends expression,
-         * * nullType if the extends expression is the null value,
-         * * anyType if the extends expression has type any, or
-         * * an object type with at least one construct signature.
-         */
         function getBaseConstructorTypeOfClass(type) {
             if (!type.resolvedBaseConstructorType) {
                 var decl = type.symbol.valueDeclaration;
@@ -33883,24 +27824,22 @@ var ts;
                 if (!baseTypeNode) {
                     return type.resolvedBaseConstructorType = undefinedType;
                 }
-                if (!pushTypeResolution(type, 1 /* ResolvedBaseConstructorType */)) {
+                if (!pushTypeResolution(type, 1)) {
                     return errorType;
                 }
                 var baseConstructorType = checkExpression(baseTypeNode.expression);
                 if (extended && baseTypeNode !== extended) {
-                    ts.Debug.assert(!extended.typeArguments); // Because this is in a JS file, and baseTypeNode is in an @extends tag
+                    ts.Debug.assert(!extended.typeArguments);
                     checkExpression(extended.expression);
                 }
-                if (baseConstructorType.flags & (131072 /* Object */ | 524288 /* Intersection */)) {
-                    // Resolving the members of a class requires us to resolve the base class of that class.
-                    // We force resolution here such that we catch circularities now.
+                if (baseConstructorType.flags & (131072 | 524288)) {
                     resolveStructuredTypeMembers(baseConstructorType);
                 }
                 if (!popTypeResolution()) {
                     error(type.symbol.valueDeclaration, ts.Diagnostics._0_is_referenced_directly_or_indirectly_in_its_own_base_expression, symbolToString(type.symbol));
                     return type.resolvedBaseConstructorType = errorType;
                 }
-                if (!(baseConstructorType.flags & 1 /* Any */) && baseConstructorType !== nullWideningType && !isConstructorType(baseConstructorType)) {
+                if (!(baseConstructorType.flags & 1) && baseConstructorType !== nullWideningType && !isConstructorType(baseConstructorType)) {
                     error(baseTypeNode.expression, ts.Diagnostics.Type_0_is_not_a_constructor_function_type, typeToString(baseConstructorType));
                     return type.resolvedBaseConstructorType = errorType;
                 }
@@ -33910,14 +27849,14 @@ var ts;
         }
         function getBaseTypes(type) {
             if (!type.resolvedBaseTypes) {
-                if (type.objectFlags & 8 /* Tuple */) {
+                if (type.objectFlags & 8) {
                     type.resolvedBaseTypes = [createArrayType(getUnionType(type.typeParameters))];
                 }
-                else if (type.symbol.flags & (32 /* Class */ | 64 /* Interface */)) {
-                    if (type.symbol.flags & 32 /* Class */) {
+                else if (type.symbol.flags & (32 | 64)) {
+                    if (type.symbol.flags & 32) {
                         resolveBaseTypesOfClass(type);
                     }
-                    if (type.symbol.flags & 64 /* Interface */) {
+                    if (type.symbol.flags & 64) {
                         resolveBaseTypesOfInterface(type);
                     }
                 }
@@ -33930,27 +27869,21 @@ var ts;
         function resolveBaseTypesOfClass(type) {
             type.resolvedBaseTypes = ts.resolvingEmptyArray;
             var baseConstructorType = getApparentType(getBaseConstructorTypeOfClass(type));
-            if (!(baseConstructorType.flags & (131072 /* Object */ | 524288 /* Intersection */ | 1 /* Any */))) {
+            if (!(baseConstructorType.flags & (131072 | 524288 | 1))) {
                 return type.resolvedBaseTypes = ts.emptyArray;
             }
             var baseTypeNode = getBaseTypeNodeOfClass(type);
             var typeArgs = typeArgumentsFromTypeReferenceNode(baseTypeNode);
             var baseType;
             var originalBaseType = baseConstructorType && baseConstructorType.symbol ? getDeclaredTypeOfSymbol(baseConstructorType.symbol) : undefined;
-            if (baseConstructorType.symbol && baseConstructorType.symbol.flags & 32 /* Class */ &&
+            if (baseConstructorType.symbol && baseConstructorType.symbol.flags & 32 &&
                 areAllOuterTypeParametersApplied(originalBaseType)) {
-                // When base constructor type is a class with no captured type arguments we know that the constructors all have the same type parameters as the
-                // class and all return the instance type of the class. There is no need for further checks and we can apply the
-                // type arguments in the same manner as a type reference to get the same error reporting experience.
                 baseType = getTypeFromClassOrInterfaceReference(baseTypeNode, baseConstructorType.symbol, typeArgs);
             }
-            else if (baseConstructorType.flags & 1 /* Any */) {
+            else if (baseConstructorType.flags & 1) {
                 baseType = baseConstructorType;
             }
             else {
-                // The class derives from a "class-like" constructor function, check that we have at least one construct signature
-                // with a matching number of type parameters and use the return type of the first instantiated signature. Elsewhere
-                // we check that all instantiated signatures return the same type.
                 var constructors = getInstantiatedConstructorsForTypeArguments(baseConstructorType, baseTypeNode.typeArguments, baseTypeNode);
                 if (!constructors.length) {
                     error(baseTypeNode.expression, ts.Diagnostics.No_base_constructor_has_the_specified_number_of_type_arguments);
@@ -33966,21 +27899,15 @@ var ts;
                 return type.resolvedBaseTypes = ts.emptyArray;
             }
             if (type === baseType || hasBaseType(baseType, type)) {
-                error(type.symbol.valueDeclaration, ts.Diagnostics.Type_0_recursively_references_itself_as_a_base_type, typeToString(type, /*enclosingDeclaration*/ undefined, 2 /* WriteArrayAsGenericType */));
+                error(type.symbol.valueDeclaration, ts.Diagnostics.Type_0_recursively_references_itself_as_a_base_type, typeToString(type, undefined, 2));
                 return type.resolvedBaseTypes = ts.emptyArray;
             }
             if (type.resolvedBaseTypes === ts.resolvingEmptyArray) {
-                // Circular reference, likely through instantiation of default parameters
-                // (otherwise there'd be an error from hasBaseType) - this is fine, but `.members` should be reset
-                // as `getIndexedAccessType` via `instantiateType` via `getTypeFromClassOrInterfaceReference` forces a
-                // partial instantiation of the members without the base types fully resolved
-                type.members = undefined; // TODO: GH#18217
+                type.members = undefined;
             }
             return type.resolvedBaseTypes = [baseType];
         }
         function areAllOuterTypeParametersApplied(type) {
-            // An unapplied type parameter has its symbol still the same as the matching argument symbol.
-            // Since parameters are applied outer-to-inner, only the last outer parameter needs to be checked.
             var outerTypeParameters = type.outerTypeParameters;
             if (outerTypeParameters) {
                 var last_1 = outerTypeParameters.length - 1;
@@ -33989,17 +27916,15 @@ var ts;
             }
             return true;
         }
-        // A valid base type is `any`, any non-generic object type or intersection of non-generic
-        // object types.
         function isValidBaseType(type) {
-            return !!(type.flags & (131072 /* Object */ | 16777216 /* NonPrimitive */ | 1 /* Any */)) && !isGenericMappedType(type) ||
-                !!(type.flags & 524288 /* Intersection */) && ts.every(type.types, isValidBaseType);
+            return !!(type.flags & (131072 | 16777216 | 1)) && !isGenericMappedType(type) ||
+                !!(type.flags & 524288) && ts.every(type.types, isValidBaseType);
         }
         function resolveBaseTypesOfInterface(type) {
             type.resolvedBaseTypes = type.resolvedBaseTypes || ts.emptyArray;
             for (var _i = 0, _a = type.symbol.declarations; _i < _a.length; _i++) {
                 var declaration = _a[_i];
-                if (declaration.kind === 236 /* InterfaceDeclaration */ && ts.getInterfaceBaseTypeNodes(declaration)) {
+                if (declaration.kind === 236 && ts.getInterfaceBaseTypeNodes(declaration)) {
                     for (var _b = 0, _c = ts.getInterfaceBaseTypeNodes(declaration); _b < _c.length; _b++) {
                         var node = _c[_b];
                         var baseType = getTypeFromTypeNode(node);
@@ -34014,7 +27939,7 @@ var ts;
                                     }
                                 }
                                 else {
-                                    error(declaration, ts.Diagnostics.Type_0_recursively_references_itself_as_a_base_type, typeToString(type, /*enclosingDeclaration*/ undefined, 2 /* WriteArrayAsGenericType */));
+                                    error(declaration, ts.Diagnostics.Type_0_recursively_references_itself_as_a_base_type, typeToString(type, undefined, 2));
                                 }
                             }
                             else {
@@ -34025,18 +27950,11 @@ var ts;
                 }
             }
         }
-        /**
-         * Returns true if the interface given by the symbol is free of "this" references.
-         *
-         * Specifically, the result is true if the interface itself contains no references
-         * to "this" in its body, if all base types are interfaces,
-         * and if none of the base interfaces have a "this" type.
-         */
         function isThislessInterface(symbol) {
             for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
                 var declaration = _a[_i];
-                if (declaration.kind === 236 /* InterfaceDeclaration */) {
-                    if (declaration.flags & 64 /* ContainsThis */) {
+                if (declaration.kind === 236) {
+                    if (declaration.flags & 64) {
                         return false;
                     }
                     var baseTypeNodes = ts.getInterfaceBaseTypeNodes(declaration);
@@ -34044,8 +27962,8 @@ var ts;
                         for (var _b = 0, baseTypeNodes_1 = baseTypeNodes; _b < baseTypeNodes_1.length; _b++) {
                             var node = baseTypeNodes_1[_b];
                             if (ts.isEntityNameExpression(node.expression)) {
-                                var baseSymbol = resolveEntityName(node.expression, 67901928 /* Type */, /*ignoreErrors*/ true);
-                                if (!baseSymbol || !(baseSymbol.flags & 64 /* Interface */) || getDeclaredTypeOfClassOrInterface(baseSymbol).thisType) {
+                                var baseSymbol = resolveEntityName(node.expression, 67901928, true);
+                                if (!baseSymbol || !(baseSymbol.flags & 64) || getDeclaredTypeOfClassOrInterface(baseSymbol).thisType) {
                                     return false;
                                 }
                             }
@@ -34058,17 +27976,12 @@ var ts;
         function getDeclaredTypeOfClassOrInterface(symbol) {
             var links = getSymbolLinks(symbol);
             if (!links.declaredType) {
-                var kind = symbol.flags & 32 /* Class */ ? 1 /* Class */ : 2 /* Interface */;
+                var kind = symbol.flags & 32 ? 1 : 2;
                 var type = links.declaredType = createObjectType(kind, symbol);
                 var outerTypeParameters = getOuterTypeParametersOfClassOrInterface(symbol);
                 var localTypeParameters = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol);
-                // A class or interface is generic if it has type parameters or a "this" type. We always give classes a "this" type
-                // because it is not feasible to analyze all members to determine if the "this" type escapes the class (in particular,
-                // property types inferred from initializers and method return types inferred from return statements are very hard
-                // to exhaustively analyze). We give interfaces a "this" type if we can't definitely determine that they are free of
-                // "this" references.
-                if (outerTypeParameters || localTypeParameters || kind === 1 /* Class */ || !isThislessInterface(symbol)) {
-                    type.objectFlags |= 4 /* Reference */;
+                if (outerTypeParameters || localTypeParameters || kind === 1 || !isThislessInterface(symbol)) {
+                    type.objectFlags |= 4;
                     type.typeParameters = ts.concatenate(outerTypeParameters, localTypeParameters);
                     type.outerTypeParameters = outerTypeParameters;
                     type.localTypeParameters = localTypeParameters;
@@ -34076,7 +27989,7 @@ var ts;
                     type.instantiations.set(getTypeListId(type.typeParameters), type);
                     type.target = type;
                     type.typeArguments = type.typeParameters;
-                    type.thisType = createType(65536 /* TypeParameter */);
+                    type.thisType = createType(65536);
                     type.thisType.isThisType = true;
                     type.thisType.symbol = symbol;
                     type.thisType.constraint = type;
@@ -34087,22 +28000,17 @@ var ts;
         function getDeclaredTypeOfTypeAlias(symbol) {
             var links = getSymbolLinks(symbol);
             if (!links.declaredType) {
-                // Note that we use the links object as the target here because the symbol object is used as the unique
-                // identity for resolution of the 'type' property in SymbolLinks.
-                if (!pushTypeResolution(symbol, 2 /* DeclaredType */)) {
+                if (!pushTypeResolution(symbol, 2)) {
                     return errorType;
                 }
                 var declaration = ts.find(symbol.declarations, function (d) {
-                    return ts.isJSDocTypeAlias(d) || d.kind === 237 /* TypeAliasDeclaration */;
+                    return ts.isJSDocTypeAlias(d) || d.kind === 237;
                 });
                 var typeNode = ts.isJSDocTypeAlias(declaration) ? declaration.typeExpression : declaration.type;
-                // If typeNode is missing, we will error in checkJSDocTypedefTag.
                 var type = typeNode ? getTypeFromTypeNode(typeNode) : errorType;
                 if (popTypeResolution()) {
                     var typeParameters = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol);
                     if (typeParameters) {
-                        // Initialize the instantiation cache for generic type aliases. The declared type corresponds to
-                        // an instantiation of the type alias with the type parameters supplied as type arguments.
                         links.typeParameters = typeParameters;
                         links.instantiations = ts.createMap();
                         links.instantiations.set(getTypeListId(typeParameters), type);
@@ -34117,10 +28025,10 @@ var ts;
             return links.declaredType;
         }
         function isStringConcatExpression(expr) {
-            if (expr.kind === 9 /* StringLiteral */) {
+            if (expr.kind === 9) {
                 return true;
             }
-            else if (expr.kind === 200 /* BinaryExpression */) {
+            else if (expr.kind === 200) {
                 return isStringConcatExpression(expr.left) && isStringConcatExpression(expr.right);
             }
             return false;
@@ -34128,18 +28036,18 @@ var ts;
         function isLiteralEnumMember(member) {
             var expr = member.initializer;
             if (!expr) {
-                return !(member.flags & 4194304 /* Ambient */);
+                return !(member.flags & 4194304);
             }
             switch (expr.kind) {
-                case 9 /* StringLiteral */:
-                case 8 /* NumericLiteral */:
+                case 9:
+                case 8:
                     return true;
-                case 198 /* PrefixUnaryExpression */:
-                    return expr.operator === 38 /* MinusToken */ &&
-                        expr.operand.kind === 8 /* NumericLiteral */;
-                case 71 /* Identifier */:
+                case 198:
+                    return expr.operator === 38 &&
+                        expr.operand.kind === 8;
+                case 71:
                     return ts.nodeIsMissing(expr) || !!getSymbolOfNode(member.parent).exports.get(expr.escapedText);
-                case 200 /* BinaryExpression */:
+                case 200:
                     return isStringConcatExpression(expr);
                 default:
                     return false;
@@ -34153,11 +28061,11 @@ var ts;
             var hasNonLiteralMember = false;
             for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
                 var declaration = _a[_i];
-                if (declaration.kind === 238 /* EnumDeclaration */) {
+                if (declaration.kind === 238) {
                     for (var _b = 0, _c = declaration.members; _b < _c.length; _b++) {
                         var member = _c[_b];
-                        if (member.initializer && member.initializer.kind === 9 /* StringLiteral */) {
-                            return links.enumKind = 1 /* Literal */;
+                        if (member.initializer && member.initializer.kind === 9) {
+                            return links.enumKind = 1;
                         }
                         if (!isLiteralEnumMember(member)) {
                             hasNonLiteralMember = true;
@@ -34165,40 +28073,40 @@ var ts;
                     }
                 }
             }
-            return links.enumKind = hasNonLiteralMember ? 0 /* Numeric */ : 1 /* Literal */;
+            return links.enumKind = hasNonLiteralMember ? 0 : 1;
         }
         function getBaseTypeOfEnumLiteralType(type) {
-            return type.flags & 512 /* EnumLiteral */ && !(type.flags & 262144 /* Union */) ? getDeclaredTypeOfSymbol(getParentOfSymbol(type.symbol)) : type;
+            return type.flags & 512 && !(type.flags & 262144) ? getDeclaredTypeOfSymbol(getParentOfSymbol(type.symbol)) : type;
         }
         function getDeclaredTypeOfEnum(symbol) {
             var links = getSymbolLinks(symbol);
             if (links.declaredType) {
                 return links.declaredType;
             }
-            if (getEnumKind(symbol) === 1 /* Literal */) {
+            if (getEnumKind(symbol) === 1) {
                 enumCount++;
                 var memberTypeList = [];
                 for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
                     var declaration = _a[_i];
-                    if (declaration.kind === 238 /* EnumDeclaration */) {
+                    if (declaration.kind === 238) {
                         for (var _b = 0, _c = declaration.members; _b < _c.length; _b++) {
                             var member = _c[_b];
-                            var memberType = getLiteralType(getEnumMemberValue(member), enumCount, getSymbolOfNode(member)); // TODO: GH#18217
+                            var memberType = getLiteralType(getEnumMemberValue(member), enumCount, getSymbolOfNode(member));
                             getSymbolLinks(getSymbolOfNode(member)).declaredType = memberType;
                             memberTypeList.push(memberType);
                         }
                     }
                 }
                 if (memberTypeList.length) {
-                    var enumType_1 = getUnionType(memberTypeList, 1 /* Literal */, symbol, /*aliasTypeArguments*/ undefined);
-                    if (enumType_1.flags & 262144 /* Union */) {
-                        enumType_1.flags |= 512 /* EnumLiteral */;
+                    var enumType_1 = getUnionType(memberTypeList, 1, symbol, undefined);
+                    if (enumType_1.flags & 262144) {
+                        enumType_1.flags |= 512;
                         enumType_1.symbol = symbol;
                     }
                     return links.declaredType = enumType_1;
                 }
             }
-            var enumType = createType(32 /* Enum */);
+            var enumType = createType(32);
             enumType.symbol = symbol;
             return links.declaredType = enumType;
         }
@@ -34215,7 +28123,7 @@ var ts;
         function getDeclaredTypeOfTypeParameter(symbol) {
             var links = getSymbolLinks(symbol);
             if (!links.declaredType) {
-                var type = createType(65536 /* TypeParameter */);
+                var type = createType(65536);
                 type.symbol = symbol;
                 links.declaredType = type;
             }
@@ -34232,107 +28140,83 @@ var ts;
             return tryGetDeclaredTypeOfSymbol(symbol) || errorType;
         }
         function tryGetDeclaredTypeOfSymbol(symbol) {
-            if (symbol.flags & (32 /* Class */ | 64 /* Interface */)) {
+            if (symbol.flags & (32 | 64)) {
                 return getDeclaredTypeOfClassOrInterface(symbol);
             }
-            if (symbol.flags & 524288 /* TypeAlias */) {
+            if (symbol.flags & 524288) {
                 return getDeclaredTypeOfTypeAlias(symbol);
             }
-            if (symbol.flags & 262144 /* TypeParameter */) {
+            if (symbol.flags & 262144) {
                 return getDeclaredTypeOfTypeParameter(symbol);
             }
-            if (symbol.flags & 384 /* Enum */) {
+            if (symbol.flags & 384) {
                 return getDeclaredTypeOfEnum(symbol);
             }
-            if (symbol.flags & 8 /* EnumMember */) {
+            if (symbol.flags & 8) {
                 return getDeclaredTypeOfEnumMember(symbol);
             }
-            if (symbol.flags & 2097152 /* Alias */) {
+            if (symbol.flags & 2097152) {
                 return getDeclaredTypeOfAlias(symbol);
             }
             return undefined;
         }
-        /**
-         * A type is free of this references if it's the any, string, number, boolean, symbol, or void keyword, a string
-         * literal type, an array with an element type that is free of this references, or a type reference that is
-         * free of this references.
-         */
         function isThislessType(node) {
             switch (node.kind) {
-                case 119 /* AnyKeyword */:
-                case 142 /* UnknownKeyword */:
-                case 137 /* StringKeyword */:
-                case 134 /* NumberKeyword */:
-                case 122 /* BooleanKeyword */:
-                case 138 /* SymbolKeyword */:
-                case 135 /* ObjectKeyword */:
-                case 105 /* VoidKeyword */:
-                case 140 /* UndefinedKeyword */:
-                case 95 /* NullKeyword */:
-                case 131 /* NeverKeyword */:
-                case 178 /* LiteralType */:
+                case 119:
+                case 142:
+                case 137:
+                case 134:
+                case 122:
+                case 138:
+                case 135:
+                case 105:
+                case 140:
+                case 95:
+                case 131:
+                case 178:
                     return true;
-                case 167 /* ArrayType */:
+                case 167:
                     return isThislessType(node.elementType);
-                case 162 /* TypeReference */:
+                case 162:
                     return !node.typeArguments || node.typeArguments.every(isThislessType);
             }
             return false;
         }
-        /** A type parameter is thisless if its contraint is thisless, or if it has no constraint. */
         function isThislessTypeParameter(node) {
             return !node.constraint || isThislessType(node.constraint);
         }
-        /**
-         * A variable-like declaration is free of this references if it has a type annotation
-         * that is thisless, or if it has no type annotation and no initializer (and is thus of type any).
-         */
         function isThislessVariableLikeDeclaration(node) {
             var typeNode = ts.getEffectiveTypeAnnotationNode(node);
             return typeNode ? isThislessType(typeNode) : !ts.hasInitializer(node);
         }
-        /**
-         * A function-like declaration is considered free of `this` references if it has a return type
-         * annotation that is free of this references and if each parameter is thisless and if
-         * each type parameter (if present) is thisless.
-         */
         function isThislessFunctionLikeDeclaration(node) {
             var returnType = ts.getEffectiveReturnTypeNode(node);
             var typeParameters = ts.getEffectiveTypeParameterDeclarations(node);
-            return (node.kind === 155 /* Constructor */ || (!!returnType && isThislessType(returnType))) &&
+            return (node.kind === 155 || (!!returnType && isThislessType(returnType))) &&
                 node.parameters.every(isThislessVariableLikeDeclaration) &&
                 typeParameters.every(isThislessTypeParameter);
         }
-        /**
-         * Returns true if the class or interface member given by the symbol is free of "this" references. The
-         * function may return false for symbols that are actually free of "this" references because it is not
-         * feasible to perform a complete analysis in all cases. In particular, property members with types
-         * inferred from their initializers and function members with inferred return types are conservatively
-         * assumed not to be free of "this" references.
-         */
         function isThisless(symbol) {
             if (symbol.declarations && symbol.declarations.length === 1) {
                 var declaration = symbol.declarations[0];
                 if (declaration) {
                     switch (declaration.kind) {
-                        case 152 /* PropertyDeclaration */:
-                        case 151 /* PropertySignature */:
+                        case 152:
+                        case 151:
                             return isThislessVariableLikeDeclaration(declaration);
-                        case 154 /* MethodDeclaration */:
-                        case 153 /* MethodSignature */:
-                        case 155 /* Constructor */:
+                        case 154:
+                        case 153:
+                        case 155:
                             return isThislessFunctionLikeDeclaration(declaration);
                     }
                 }
             }
             return false;
         }
-        // The mappingThisOnly flag indicates that the only type parameter being mapped is "this". When the flag is true,
-        // we check symbols to see if we can quickly conclude they are free of "this" references, thus needing no instantiation.
         function createInstantiatedSymbolTable(symbols, mapper, mappingThisOnly) {
             var result = ts.createSymbolTable();
-            for (var _i = 0, symbols_1 = symbols; _i < symbols_1.length; _i++) {
-                var symbol = symbols_1[_i];
+            for (var _i = 0, symbols_2 = symbols; _i < symbols_2.length; _i++) {
+                var symbol = symbols_2[_i];
                 result.set(symbol.escapedName, mappingThisOnly && isThisless(symbol) ? symbol : instantiateSymbol(symbol, mapper));
             }
             return result;
@@ -34350,73 +28234,44 @@ var ts;
                 var symbol = type.symbol;
                 var members = getMembersOfSymbol(symbol);
                 type.declaredProperties = getNamedMembers(members);
-                // Start with signatures at empty array in case of recursive types
                 type.declaredCallSignatures = ts.emptyArray;
                 type.declaredConstructSignatures = ts.emptyArray;
-                type.declaredCallSignatures = getSignaturesOfSymbol(members.get("__call" /* Call */));
-                type.declaredConstructSignatures = getSignaturesOfSymbol(members.get("__new" /* New */));
-                type.declaredStringIndexInfo = getIndexInfoOfSymbol(symbol, 0 /* String */);
-                type.declaredNumberIndexInfo = getIndexInfoOfSymbol(symbol, 1 /* Number */);
+                type.declaredCallSignatures = getSignaturesOfSymbol(members.get("__call"));
+                type.declaredConstructSignatures = getSignaturesOfSymbol(members.get("__new"));
+                type.declaredStringIndexInfo = getIndexInfoOfSymbol(symbol, 0);
+                type.declaredNumberIndexInfo = getIndexInfoOfSymbol(symbol, 1);
             }
             return type;
         }
-        /**
-         * Indicates whether a type can be used as a late-bound name.
-         */
         function isTypeUsableAsLateBoundName(type) {
-            return !!(type.flags & 2240 /* StringOrNumberLiteralOrUnique */);
-        }
-        /**
-         * Indicates whether a declaration name is definitely late-bindable.
-         * A declaration name is only late-bindable if:
-         * - It is a `ComputedPropertyName`.
-         * - Its expression is an `Identifier` or either a `PropertyAccessExpression` an
-         * `ElementAccessExpression` consisting only of these same three types of nodes.
-         * - The type of its expression is a string or numeric literal type, or is a `unique symbol` type.
-         */
+            return !!(type.flags & 2240);
+        }
         function isLateBindableName(node) {
             return ts.isComputedPropertyName(node)
                 && ts.isEntityNameExpression(node.expression)
                 && isTypeUsableAsLateBoundName(checkComputedPropertyName(node));
         }
-        /**
-         * Indicates whether a declaration has a late-bindable dynamic name.
-         */
         function hasLateBindableName(node) {
             var name = ts.getNameOfDeclaration(node);
             return !!name && isLateBindableName(name);
         }
-        /**
-         * Indicates whether a declaration has a dynamic name that cannot be late-bound.
-         */
         function hasNonBindableDynamicName(node) {
             return ts.hasDynamicName(node) && !hasLateBindableName(node);
         }
-        /**
-         * Indicates whether a declaration name is a dynamic name that cannot be late-bound.
-         */
         function isNonBindableDynamicName(node) {
             return ts.isDynamicName(node) && !isLateBindableName(node);
         }
-        /**
-         * Gets the symbolic name for a late-bound member from its type.
-         */
         function getLateBoundNameFromType(type) {
-            if (type.flags & 2048 /* UniqueESSymbol */) {
+            if (type.flags & 2048) {
                 return "__@" + type.symbol.escapedName + "@" + getSymbolId(type.symbol);
             }
-            if (type.flags & 192 /* StringOrNumberLiteral */) {
+            if (type.flags & 192) {
                 return ts.escapeLeadingUnderscores("" + type.value);
             }
             return ts.Debug.fail();
         }
-        /**
-         * Adds a declaration to a late-bound dynamic member. This performs the same function for
-         * late-bound members that `addDeclarationToSymbol` in binder.ts performs for early-bound
-         * members.
-         */
         function addDeclarationToLateBoundSymbol(symbol, member, symbolFlags) {
-            ts.Debug.assert(!!(ts.getCheckFlags(symbol) & 1024 /* Late */), "Expected a late-bound symbol.");
+            ts.Debug.assert(!!(ts.getCheckFlags(symbol) & 1024), "Expected a late-bound symbol.");
             symbol.flags |= symbolFlags;
             getSymbolLinks(member.symbol).lateSymbol = symbol;
             if (!symbol.declarations) {
@@ -34425,67 +28280,31 @@ var ts;
             else {
                 symbol.declarations.push(member);
             }
-            if (symbolFlags & 67216319 /* Value */) {
+            if (symbolFlags & 67216319) {
                 if (!symbol.valueDeclaration || symbol.valueDeclaration.kind !== member.kind) {
                     symbol.valueDeclaration = member;
                 }
             }
         }
-        /**
-         * Performs late-binding of a dynamic member. This performs the same function for
-         * late-bound members that `declareSymbol` in binder.ts performs for early-bound
-         * members.
-         *
-         * If a symbol is a dynamic name from a computed property, we perform an additional "late"
-         * binding phase to attempt to resolve the name for the symbol from the type of the computed
-         * property's expression. If the type of the expression is a string-literal, numeric-literal,
-         * or unique symbol type, we can use that type as the name of the symbol.
-         *
-         * For example, given:
-         *
-         *   const x = Symbol();
-         *
-         *   interface I {
-         *     [x]: number;
-         *   }
-         *
-         * The binder gives the property `[x]: number` a special symbol with the name "__computed".
-         * In the late-binding phase we can type-check the expression `x` and see that it has a
-         * unique symbol type which we can then use as the name of the member. This allows users
-         * to define custom symbols that can be used in the members of an object type.
-         *
-         * @param parent The containing symbol for the member.
-         * @param earlySymbols The early-bound symbols of the parent.
-         * @param lateSymbols The late-bound symbols of the parent.
-         * @param decl The member to bind.
-         */
         function lateBindMember(parent, earlySymbols, lateSymbols, decl) {
             ts.Debug.assert(!!decl.symbol, "The member is expected to have a symbol.");
             var links = getNodeLinks(decl);
             if (!links.resolvedSymbol) {
-                // In the event we attempt to resolve the late-bound name of this member recursively,
-                // fall back to the early-bound name of this member.
                 links.resolvedSymbol = decl.symbol;
                 var type = checkComputedPropertyName(decl.name);
                 if (isTypeUsableAsLateBoundName(type)) {
                     var memberName = getLateBoundNameFromType(type);
                     var symbolFlags = decl.symbol.flags;
-                    // Get or add a late-bound symbol for the member. This allows us to merge late-bound accessor declarations.
                     var lateSymbol = lateSymbols.get(memberName);
                     if (!lateSymbol)
-                        lateSymbols.set(memberName, lateSymbol = createSymbol(0 /* None */, memberName, 1024 /* Late */));
-                    // Report an error if a late-bound member has the same name as an early-bound member,
-                    // or if we have another early-bound symbol declaration with the same name and
-                    // conflicting flags.
+                        lateSymbols.set(memberName, lateSymbol = createSymbol(0, memberName, 1024));
                     var earlySymbol = earlySymbols && earlySymbols.get(memberName);
                     if (lateSymbol.flags & getExcludedSymbolFlags(symbolFlags) || earlySymbol) {
-                        // If we have an existing early-bound member, combine its declarations so that we can
-                        // report an error at each declaration.
                         var declarations = earlySymbol ? ts.concatenate(earlySymbol.declarations, lateSymbol.declarations) : lateSymbol.declarations;
-                        var name_1 = ts.declarationNameToString(decl.name);
-                        ts.forEach(declarations, function (declaration) { return error(ts.getNameOfDeclaration(declaration) || declaration, ts.Diagnostics.Duplicate_declaration_0, name_1); });
-                        error(decl.name || decl, ts.Diagnostics.Duplicate_declaration_0, name_1);
-                        lateSymbol = createSymbol(0 /* None */, memberName, 1024 /* Late */);
+                        var name_2 = ts.declarationNameToString(decl.name);
+                        ts.forEach(declarations, function (declaration) { return error(ts.getNameOfDeclaration(declaration) || declaration, ts.Diagnostics.Duplicate_declaration_0, name_2); });
+                        error(decl.name || decl, ts.Diagnostics.Duplicate_declaration_0, name_2);
+                        lateSymbol = createSymbol(0, memberName, 1024);
                     }
                     lateSymbol.nameType = type;
                     addDeclarationToLateBoundSymbol(lateSymbol, decl, symbolFlags);
@@ -34503,22 +28322,18 @@ var ts;
         function getResolvedMembersOrExportsOfSymbol(symbol, resolutionKind) {
             var links = getSymbolLinks(symbol);
             if (!links[resolutionKind]) {
-                var isStatic = resolutionKind === "resolvedExports" /* resolvedExports */;
+                var isStatic = resolutionKind === "resolvedExports";
                 var earlySymbols = !isStatic ? symbol.members :
-                    symbol.flags & 1536 /* Module */ ? getExportsOfModuleWorker(symbol) :
+                    symbol.flags & 1536 ? getExportsOfModuleWorker(symbol) :
                         symbol.exports;
-                // In the event we recursively resolve the members/exports of the symbol, we
-                // set the initial value of resolvedMembers/resolvedExports to the early-bound
-                // members/exports of the symbol.
                 links[resolutionKind] = earlySymbols || emptySymbols;
-                // fill in any as-yet-unresolved late-bound members.
                 var lateSymbols = ts.createSymbolTable();
                 for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
                     var decl = _a[_i];
                     var members = ts.getMembersOfDeclaration(decl);
                     if (members) {
-                        for (var _b = 0, members_3 = members; _b < members_3.length; _b++) {
-                            var member = members_3[_b];
+                        for (var _b = 0, members_4 = members; _b < members_4.length; _b++) {
+                            var member = members_4[_b];
                             if (isStatic === ts.hasStaticModifier(member) && hasLateBindableName(member)) {
                                 lateBindMember(symbol, earlySymbols, lateSymbols, member);
                             }
@@ -34529,27 +28344,15 @@ var ts;
             }
             return links[resolutionKind];
         }
-        /**
-         * Gets a SymbolTable containing both the early- and late-bound members of a symbol.
-         *
-         * For a description of late-binding, see `lateBindMember`.
-         */
         function getMembersOfSymbol(symbol) {
-            return symbol.flags & 6240 /* LateBindingContainer */
-                ? getResolvedMembersOrExportsOfSymbol(symbol, "resolvedMembers" /* resolvedMembers */)
+            return symbol.flags & 6240
+                ? getResolvedMembersOrExportsOfSymbol(symbol, "resolvedMembers")
                 : symbol.members || emptySymbols;
         }
-        /**
-         * If a symbol is the dynamic name of the member of an object type, get the late-bound
-         * symbol of the member.
-         *
-         * For a description of late-binding, see `lateBindMember`.
-         */
         function getLateBoundSymbol(symbol) {
-            if (symbol.flags & 106500 /* ClassMember */ && symbol.escapedName === "__computed" /* Computed */) {
+            if (symbol.flags & 106500 && symbol.escapedName === "__computed") {
                 var links = getSymbolLinks(symbol);
                 if (!links.lateSymbol && ts.some(symbol.declarations, hasLateBindableName)) {
-                    // force late binding of members/exports. This will set the late-bound symbol
                     if (ts.some(symbol.declarations, ts.hasStaticModifier)) {
                         getExportsOfSymbol(symbol.parent);
                     }
@@ -34562,7 +28365,7 @@ var ts;
             return symbol;
         }
         function getTypeWithThisArgument(type, thisArgument, needApparentType) {
-            if (ts.getObjectFlags(type) & 4 /* Reference */) {
+            if (ts.getObjectFlags(type) & 4) {
                 var target = type.target;
                 var typeArguments = type.typeArguments;
                 if (ts.length(target.typeParameters) === ts.length(typeArguments)) {
@@ -34570,7 +28373,7 @@ var ts;
                     return needApparentType ? getApparentType(ref) : ref;
                 }
             }
-            else if (type.flags & 524288 /* Intersection */) {
+            else if (type.flags & 524288) {
                 return getIntersectionType(ts.map(type.types, function (t) { return getTypeWithThisArgument(t, thisArgument, needApparentType); }));
             }
             return needApparentType ? getApparentType(type) : type;
@@ -34592,7 +28395,7 @@ var ts;
             }
             else {
                 mapper = createTypeMapper(typeParameters, typeArguments);
-                members = createInstantiatedSymbolTable(source.declaredProperties, mapper, /*mappingThisOnly*/ typeParameters.length === 1);
+                members = createInstantiatedSymbolTable(source.declaredProperties, mapper, typeParameters.length === 1);
                 callSignatures = instantiateSignatures(source.declaredCallSignatures, mapper);
                 constructSignatures = instantiateSignatures(source.declaredConstructSignatures, mapper);
                 stringIndexInfo = instantiateIndexInfo(source.declaredStringIndexInfo, mapper);
@@ -34609,14 +28412,14 @@ var ts;
                     var baseType = baseTypes_1[_i];
                     var instantiatedBaseType = thisArgument ? getTypeWithThisArgument(instantiateType(baseType, mapper), thisArgument) : baseType;
                     addInheritedMembers(members, getPropertiesOfType(instantiatedBaseType));
-                    callSignatures = ts.concatenate(callSignatures, getSignaturesOfType(instantiatedBaseType, 0 /* Call */));
-                    constructSignatures = ts.concatenate(constructSignatures, getSignaturesOfType(instantiatedBaseType, 1 /* Construct */));
+                    callSignatures = ts.concatenate(callSignatures, getSignaturesOfType(instantiatedBaseType, 0));
+                    constructSignatures = ts.concatenate(constructSignatures, getSignaturesOfType(instantiatedBaseType, 1));
                     if (!stringIndexInfo) {
                         stringIndexInfo = instantiatedBaseType === anyType ?
-                            createIndexInfo(anyType, /*isReadonly*/ false) :
-                            getIndexInfoOfType(instantiatedBaseType, 0 /* String */);
+                            createIndexInfo(anyType, false) :
+                            getIndexInfoOfType(instantiatedBaseType, 0);
                     }
-                    numberIndexInfo = numberIndexInfo || getIndexInfoOfType(instantiatedBaseType, 1 /* Number */);
+                    numberIndexInfo = numberIndexInfo || getIndexInfoOfType(instantiatedBaseType, 1);
                 }
             }
             setStructuredTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
@@ -34647,14 +28450,13 @@ var ts;
             return sig;
         }
         function cloneSignature(sig) {
-            return createSignature(sig.declaration, sig.typeParameters, sig.thisParameter, sig.parameters, /*resolvedReturnType*/ undefined, 
-            /*resolvedTypePredicate*/ undefined, sig.minArgumentCount, sig.hasRestParameter, sig.hasLiteralTypes);
+            return createSignature(sig.declaration, sig.typeParameters, sig.thisParameter, sig.parameters, undefined, undefined, sig.minArgumentCount, sig.hasRestParameter, sig.hasLiteralTypes);
         }
         function getDefaultConstructSignatures(classType) {
             var baseConstructorType = getBaseConstructorTypeOfClass(classType);
-            var baseSignatures = getSignaturesOfType(baseConstructorType, 1 /* Construct */);
+            var baseSignatures = getSignaturesOfType(baseConstructorType, 1);
             if (baseSignatures.length === 0) {
-                return [createSignature(undefined, classType.localTypeParameters, undefined, ts.emptyArray, classType, /*resolvedTypePredicate*/ undefined, 0, /*hasRestParameter*/ false, /*hasLiteralTypes*/ false)]; // TODO: GH#18217
+                return [createSignature(undefined, classType.localTypeParameters, undefined, ts.emptyArray, classType, undefined, 0, false, false)];
             }
             var baseTypeNode = getBaseTypeNodeOfClass(classType);
             var isJavaScript = ts.isInJavaScriptFile(baseTypeNode);
@@ -34684,13 +28486,11 @@ var ts;
         }
         function findMatchingSignatures(signatureLists, signature, listIndex) {
             if (signature.typeParameters) {
-                // We require an exact match for generic signatures, so we only return signatures from the first
-                // signature list and only if they have exact matches in the other signature lists.
                 if (listIndex > 0) {
                     return undefined;
                 }
                 for (var i = 1; i < signatureLists.length; i++) {
-                    if (!findMatchingSignature(signatureLists[i], signature, /*partialMatch*/ false, /*ignoreThisTypes*/ false, /*ignoreReturnTypes*/ false)) {
+                    if (!findMatchingSignature(signatureLists[i], signature, false, false, false)) {
                         return undefined;
                     }
                 }
@@ -34698,8 +28498,7 @@ var ts;
             }
             var result;
             for (var i = 0; i < signatureLists.length; i++) {
-                // Allow matching non-generic signatures to have excess parameters and different return types
-                var match = i === listIndex ? signature : findMatchingSignature(signatureLists[i], signature, /*partialMatch*/ true, /*ignoreThisTypes*/ true, /*ignoreReturnTypes*/ true);
+                var match = i === listIndex ? signature : findMatchingSignature(signatureLists[i], signature, true, true, true);
                 if (!match) {
                     return undefined;
                 }
@@ -34707,27 +28506,20 @@ var ts;
             }
             return result;
         }
-        // The signatures of a union type are those signatures that are present in each of the constituent types.
-        // Generic signatures must match exactly, but non-generic signatures are allowed to have extra optional
-        // parameters and may differ in return types. When signatures differ in return types, the resulting return
-        // type is the union of the constituent return types.
         function getUnionSignatures(types, kind) {
             var signatureLists = ts.map(types, function (t) { return getSignaturesOfType(t, kind); });
             var result;
             for (var i = 0; i < signatureLists.length; i++) {
                 for (var _i = 0, _a = signatureLists[i]; _i < _a.length; _i++) {
                     var signature = _a[_i];
-                    // Only process signatures with parameter lists that aren't already in the result list
-                    if (!result || !findMatchingSignature(result, signature, /*partialMatch*/ false, /*ignoreThisTypes*/ true, /*ignoreReturnTypes*/ true)) {
+                    if (!result || !findMatchingSignature(result, signature, false, true, true)) {
                         var unionSignatures = findMatchingSignatures(signatureLists, signature, i);
                         if (unionSignatures) {
                             var s = signature;
-                            // Union the result types when more than one signature matches
                             if (unionSignatures.length > 1) {
                                 var thisParameter = signature.thisParameter;
                                 if (ts.forEach(unionSignatures, function (sig) { return sig.thisParameter; })) {
-                                    // TODO: GH#18217 We tested that *some* has thisParameter and now act as if *all* do
-                                    var thisType = getUnionType(ts.map(unionSignatures, function (sig) { return sig.thisParameter ? getTypeOfSymbol(sig.thisParameter) : anyType; }), 2 /* Subtype */);
+                                    var thisType = getUnionType(ts.map(unionSignatures, function (sig) { return sig.thisParameter ? getTypeOfSymbol(sig.thisParameter) : anyType; }), 2);
                                     thisParameter = createSymbolWithType(signature.thisParameter, thisType);
                                 }
                                 s = cloneSignature(signature);
@@ -34753,15 +28545,13 @@ var ts;
                 indexTypes.push(indexInfo.type);
                 isAnyReadonly = isAnyReadonly || indexInfo.isReadonly;
             }
-            return createIndexInfo(getUnionType(indexTypes, 2 /* Subtype */), isAnyReadonly);
+            return createIndexInfo(getUnionType(indexTypes, 2), isAnyReadonly);
         }
         function resolveUnionTypeMembers(type) {
-            // The members and properties collections are empty for union types. To get all properties of a union
-            // type use getPropertiesOfType (only the language service uses this).
-            var callSignatures = getUnionSignatures(type.types, 0 /* Call */);
-            var constructSignatures = getUnionSignatures(type.types, 1 /* Construct */);
-            var stringIndexInfo = getUnionIndexInfo(type.types, 0 /* String */);
-            var numberIndexInfo = getUnionIndexInfo(type.types, 1 /* Number */);
+            var callSignatures = getUnionSignatures(type.types, 0);
+            var constructSignatures = getUnionSignatures(type.types, 1);
+            var stringIndexInfo = getUnionIndexInfo(type.types, 0);
+            var numberIndexInfo = getUnionIndexInfo(type.types, 1);
             setStructuredTypeMembers(type, emptySymbols, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
         }
         function intersectTypes(type1, type2) {
@@ -34780,29 +28570,22 @@ var ts;
                     mixedTypes.push(type);
                 }
                 else if (isMixinConstructorType(types[i])) {
-                    mixedTypes.push(getReturnTypeOfSignature(getSignaturesOfType(types[i], 1 /* Construct */)[0]));
+                    mixedTypes.push(getReturnTypeOfSignature(getSignaturesOfType(types[i], 1)[0]));
                 }
             }
             return getIntersectionType(mixedTypes);
         }
         function resolveIntersectionTypeMembers(type) {
-            // The members and properties collections are empty for intersection types. To get all properties of an
-            // intersection type use getPropertiesOfType (only the language service uses this).
             var callSignatures = ts.emptyArray;
             var constructSignatures = ts.emptyArray;
             var stringIndexInfo;
             var numberIndexInfo;
             var types = type.types;
             var mixinCount = ts.countWhere(types, isMixinConstructorType);
-            var _loop_2 = function (i) {
+            var _loop_5 = function (i) {
                 var t = type.types[i];
-                // When an intersection type contains mixin constructor types, the construct signatures from
-                // those types are discarded and their return types are mixed into the return types of all
-                // other construct signatures in the intersection type. For example, the intersection type
-                // '{ new(...args: any[]) => A } & { new(s: string) => B }' has a single construct signature
-                // 'new(s: string) => A & B'.
                 if (mixinCount === 0 || mixinCount === types.length && i === 0 || !isMixinConstructorType(t)) {
-                    var signatures = getSignaturesOfType(t, 1 /* Construct */);
+                    var signatures = getSignaturesOfType(t, 1);
                     if (signatures.length && mixinCount > 0) {
                         signatures = ts.map(signatures, function (s) {
                             var clone = cloneSignature(s);
@@ -34812,68 +28595,59 @@ var ts;
                     }
                     constructSignatures = ts.concatenate(constructSignatures, signatures);
                 }
-                callSignatures = ts.concatenate(callSignatures, getSignaturesOfType(t, 0 /* Call */));
-                stringIndexInfo = intersectIndexInfos(stringIndexInfo, getIndexInfoOfType(t, 0 /* String */));
-                numberIndexInfo = intersectIndexInfos(numberIndexInfo, getIndexInfoOfType(t, 1 /* Number */));
+                callSignatures = ts.concatenate(callSignatures, getSignaturesOfType(t, 0));
+                stringIndexInfo = intersectIndexInfos(stringIndexInfo, getIndexInfoOfType(t, 0));
+                numberIndexInfo = intersectIndexInfos(numberIndexInfo, getIndexInfoOfType(t, 1));
             };
             for (var i = 0; i < types.length; i++) {
-                _loop_2(i);
+                _loop_5(i);
             }
             setStructuredTypeMembers(type, emptySymbols, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
         }
-        /**
-         * Converts an AnonymousType to a ResolvedType.
-         */
         function resolveAnonymousTypeMembers(type) {
             var symbol = type.symbol;
             if (type.target) {
-                var members = createInstantiatedSymbolTable(getPropertiesOfObjectType(type.target), type.mapper, /*mappingThisOnly*/ false);
-                var callSignatures = instantiateSignatures(getSignaturesOfType(type.target, 0 /* Call */), type.mapper);
-                var constructSignatures = instantiateSignatures(getSignaturesOfType(type.target, 1 /* Construct */), type.mapper);
-                var stringIndexInfo = instantiateIndexInfo(getIndexInfoOfType(type.target, 0 /* String */), type.mapper);
-                var numberIndexInfo = instantiateIndexInfo(getIndexInfoOfType(type.target, 1 /* Number */), type.mapper);
+                var members = createInstantiatedSymbolTable(getPropertiesOfObjectType(type.target), type.mapper, false);
+                var callSignatures = instantiateSignatures(getSignaturesOfType(type.target, 0), type.mapper);
+                var constructSignatures = instantiateSignatures(getSignaturesOfType(type.target, 1), type.mapper);
+                var stringIndexInfo = instantiateIndexInfo(getIndexInfoOfType(type.target, 0), type.mapper);
+                var numberIndexInfo = instantiateIndexInfo(getIndexInfoOfType(type.target, 1), type.mapper);
                 setStructuredTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
             }
-            else if (symbol.flags & 2048 /* TypeLiteral */) {
+            else if (symbol.flags & 2048) {
                 var members = getMembersOfSymbol(symbol);
-                var callSignatures = getSignaturesOfSymbol(members.get("__call" /* Call */));
-                var constructSignatures = getSignaturesOfSymbol(members.get("__new" /* New */));
-                var stringIndexInfo = getIndexInfoOfSymbol(symbol, 0 /* String */);
-                var numberIndexInfo = getIndexInfoOfSymbol(symbol, 1 /* Number */);
+                var callSignatures = getSignaturesOfSymbol(members.get("__call"));
+                var constructSignatures = getSignaturesOfSymbol(members.get("__new"));
+                var stringIndexInfo = getIndexInfoOfSymbol(symbol, 0);
+                var numberIndexInfo = getIndexInfoOfSymbol(symbol, 1);
                 setStructuredTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
             }
             else {
-                // Combinations of function, class, enum and module
                 var members = emptySymbols;
                 var stringIndexInfo = void 0;
                 if (symbol.exports) {
                     members = getExportsOfSymbol(symbol);
                 }
                 setStructuredTypeMembers(type, members, ts.emptyArray, ts.emptyArray, undefined, undefined);
-                if (symbol.flags & 32 /* Class */) {
+                if (symbol.flags & 32) {
                     var classType = getDeclaredTypeOfClassOrInterface(symbol);
                     var baseConstructorType = getBaseConstructorTypeOfClass(classType);
-                    if (baseConstructorType.flags & (131072 /* Object */ | 524288 /* Intersection */ | 2162688 /* TypeVariable */)) {
+                    if (baseConstructorType.flags & (131072 | 524288 | 2162688)) {
                         members = ts.createSymbolTable(getNamedMembers(members));
                         addInheritedMembers(members, getPropertiesOfType(baseConstructorType));
                     }
                     else if (baseConstructorType === anyType) {
-                        stringIndexInfo = createIndexInfo(anyType, /*isReadonly*/ false);
+                        stringIndexInfo = createIndexInfo(anyType, false);
                     }
                 }
-                var numberIndexInfo = symbol.flags & 384 /* Enum */ ? enumNumberIndexInfo : undefined;
+                var numberIndexInfo = symbol.flags & 384 ? enumNumberIndexInfo : undefined;
                 setStructuredTypeMembers(type, members, ts.emptyArray, ts.emptyArray, stringIndexInfo, numberIndexInfo);
-                // We resolve the members before computing the signatures because a signature may use
-                // typeof with a qualified name expression that circularly references the type we are
-                // in the process of resolving (see issue #6072). The temporarily empty signature list
-                // will never be observed because a qualified name can't reference signatures.
-                if (symbol.flags & (16 /* Function */ | 8192 /* Method */)) {
+                if (symbol.flags & (16 | 8192)) {
                     type.callSignatures = getSignaturesOfSymbol(symbol);
                 }
-                // And likewise for construct signatures for classes
-                if (symbol.flags & 32 /* Class */) {
+                if (symbol.flags & 32) {
                     var classType = getDeclaredTypeOfClassOrInterface(symbol);
-                    var constructSignatures = getSignaturesOfSymbol(symbol.members.get("__constructor" /* Constructor */));
+                    var constructSignatures = getSignaturesOfSymbol(symbol.members.get("__constructor"));
                     if (!constructSignatures.length) {
                         constructSignatures = getDefaultConstructSignatures(classType);
                     }
@@ -34882,16 +28656,16 @@ var ts;
             }
         }
         function resolveReverseMappedTypeMembers(type) {
-            var indexInfo = getIndexInfoOfType(type.source, 0 /* String */);
+            var indexInfo = getIndexInfoOfType(type.source, 0);
             var modifiers = getMappedTypeModifiers(type.mappedType);
-            var readonlyMask = modifiers & 1 /* IncludeReadonly */ ? false : true;
-            var optionalMask = modifiers & 4 /* IncludeOptional */ ? 0 : 16777216 /* Optional */;
+            var readonlyMask = modifiers & 1 ? false : true;
+            var optionalMask = modifiers & 4 ? 0 : 16777216;
             var stringIndexInfo = indexInfo && createIndexInfo(inferReverseMappedType(indexInfo.type, type.mappedType), readonlyMask && indexInfo.isReadonly);
             var members = ts.createSymbolTable();
             for (var _i = 0, _a = getPropertiesOfType(type.source); _i < _a.length; _i++) {
                 var prop = _a[_i];
-                var checkFlags = 2048 /* ReverseMapped */ | (readonlyMask && isReadonlySymbol(prop) ? 8 /* Readonly */ : 0);
-                var inferredProp = createSymbol(4 /* Property */ | prop.flags & optionalMask, prop.escapedName, checkFlags);
+                var checkFlags = 2048 | (readonlyMask && isReadonlySymbol(prop) ? 8 : 0);
+                var inferredProp = createSymbol(4 | prop.flags & optionalMask, prop.escapedName, checkFlags);
                 inferredProp.declarations = prop.declarations;
                 inferredProp.nameType = prop.nameType;
                 inferredProp.propertyType = getTypeOfSymbol(prop);
@@ -34900,64 +28674,48 @@ var ts;
             }
             setStructuredTypeMembers(type, members, ts.emptyArray, ts.emptyArray, stringIndexInfo, undefined);
         }
-        /** Resolve the members of a mapped type { [P in K]: T } */
         function resolveMappedTypeMembers(type) {
             var members = ts.createSymbolTable();
             var stringIndexInfo;
             var numberIndexInfo;
-            // Resolve upfront such that recursive references see an empty object type.
             setStructuredTypeMembers(type, emptySymbols, ts.emptyArray, ts.emptyArray, undefined, undefined);
-            // In { [P in K]: T }, we refer to P as the type parameter type, K as the constraint type,
-            // and T as the template type.
             var typeParameter = getTypeParameterFromMappedType(type);
             var constraintType = getConstraintTypeFromMappedType(type);
             var templateType = getTemplateTypeFromMappedType(type.target || type);
-            var modifiersType = getApparentType(getModifiersTypeFromMappedType(type)); // The 'T' in 'keyof T'
+            var modifiersType = getApparentType(getModifiersTypeFromMappedType(type));
             var templateModifiers = getMappedTypeModifiers(type);
-            var include = keyofStringsOnly ? 64 /* StringLiteral */ : 2240 /* StringOrNumberLiteralOrUnique */;
+            var include = keyofStringsOnly ? 64 : 2240;
             if (isMappedTypeWithKeyofConstraintDeclaration(type)) {
-                // We have a { [P in keyof T]: X }
                 for (var _i = 0, _a = getPropertiesOfType(modifiersType); _i < _a.length; _i++) {
                     var prop = _a[_i];
-                    addMemberForKeyType(getLiteralTypeFromPropertyName(prop, include), /*_index*/ undefined, prop);
+                    addMemberForKeyType(getLiteralTypeFromPropertyName(prop, include), undefined, prop);
                 }
-                if (modifiersType.flags & 1 /* Any */ || getIndexInfoOfType(modifiersType, 0 /* String */)) {
+                if (modifiersType.flags & 1 || getIndexInfoOfType(modifiersType, 0)) {
                     addMemberForKeyType(stringType);
                 }
-                if (!keyofStringsOnly && getIndexInfoOfType(modifiersType, 1 /* Number */)) {
+                if (!keyofStringsOnly && getIndexInfoOfType(modifiersType, 1)) {
                     addMemberForKeyType(numberType);
                 }
             }
             else {
-                // First, if the constraint type is a type parameter, obtain the base constraint. Then,
-                // if the key type is a 'keyof X', obtain 'keyof C' where C is the base constraint of X.
-                // Finally, iterate over the constituents of the resulting iteration type.
-                var keyType = constraintType.flags & 14745600 /* InstantiableNonPrimitive */ ? getApparentType(constraintType) : constraintType;
-                var iterationType = keyType.flags & 1048576 /* Index */ ? getIndexType(getApparentType(keyType.type)) : keyType;
+                var keyType = constraintType.flags & 14745600 ? getApparentType(constraintType) : constraintType;
+                var iterationType = keyType.flags & 1048576 ? getIndexType(getApparentType(keyType.type)) : keyType;
                 forEachType(iterationType, addMemberForKeyType);
             }
             setStructuredTypeMembers(type, members, ts.emptyArray, ts.emptyArray, stringIndexInfo, numberIndexInfo);
             function addMemberForKeyType(t, _index, origin) {
-                // Create a mapper from T to the current iteration type constituent. Then, if the
-                // mapped type is itself an instantiated type, combine the iteration mapper with the
-                // instantiation mapper.
                 var templateMapper = combineTypeMappers(type.mapper, createTypeMapper([typeParameter], [t]));
                 var propType = instantiateType(templateType, templateMapper);
-                // If the current iteration type constituent is a string literal type, create a property.
-                // Otherwise, for type string create a string index signature.
-                if (t.flags & 2240 /* StringOrNumberLiteralOrUnique */) {
+                if (t.flags & 2240) {
                     var propName = getLateBoundNameFromType(t);
                     var modifiersProp = getPropertyOfType(modifiersType, propName);
-                    var isOptional = !!(templateModifiers & 4 /* IncludeOptional */ ||
-                        !(templateModifiers & 8 /* ExcludeOptional */) && modifiersProp && modifiersProp.flags & 16777216 /* Optional */);
-                    var isReadonly = !!(templateModifiers & 1 /* IncludeReadonly */ ||
-                        !(templateModifiers & 2 /* ExcludeReadonly */) && modifiersProp && isReadonlySymbol(modifiersProp));
-                    var prop = createSymbol(4 /* Property */ | (isOptional ? 16777216 /* Optional */ : 0), propName, isReadonly ? 8 /* Readonly */ : 0);
-                    // When creating an optional property in strictNullChecks mode, if 'undefined' isn't assignable to the
-                    // type, we include 'undefined' in the type. Similarly, when creating a non-optional property in strictNullChecks
-                    // mode, if the underlying property is optional we remove 'undefined' from the type.
+                    var isOptional = !!(templateModifiers & 4 ||
+                        !(templateModifiers & 8) && modifiersProp && modifiersProp.flags & 16777216);
+                    var isReadonly = !!(templateModifiers & 1 ||
+                        !(templateModifiers & 2) && modifiersProp && isReadonlySymbol(modifiersProp));
+                    var prop = createSymbol(4 | (isOptional ? 16777216 : 0), propName, isReadonly ? 8 : 0);
                     prop.type = strictNullChecks && isOptional && !isTypeAssignableTo(undefinedType, propType) ? getOptionalType(propType) :
-                        strictNullChecks && !isOptional && modifiersProp && modifiersProp.flags & 16777216 /* Optional */ ? getTypeWithFacts(propType, 131072 /* NEUndefined */) :
+                        strictNullChecks && !isOptional && modifiersProp && modifiersProp.flags & 16777216 ? getTypeWithFacts(propType, 131072) :
                             propType;
                     if (origin) {
                         prop.syntheticOrigin = origin;
@@ -34966,11 +28724,11 @@ var ts;
                     prop.nameType = t;
                     members.set(propName, prop);
                 }
-                else if (t.flags & (1 /* Any */ | 4 /* String */)) {
-                    stringIndexInfo = createIndexInfo(propType, !!(templateModifiers & 1 /* IncludeReadonly */));
+                else if (t.flags & (1 | 4)) {
+                    stringIndexInfo = createIndexInfo(propType, !!(templateModifiers & 1));
                 }
-                else if (t.flags & 8 /* Number */) {
-                    numberIndexInfo = createIndexInfo(propType, !!(templateModifiers & 1 /* IncludeReadonly */));
+                else if (t.flags & 8) {
+                    numberIndexInfo = createIndexInfo(propType, !!(templateModifiers & 1));
                 }
             }
         }
@@ -34985,45 +28743,39 @@ var ts;
         function getTemplateTypeFromMappedType(type) {
             return type.templateType ||
                 (type.templateType = type.declaration.type ?
-                    instantiateType(addOptionality(getTypeFromTypeNode(type.declaration.type), !!(getMappedTypeModifiers(type) & 4 /* IncludeOptional */)), type.mapper || identityMapper) :
+                    instantiateType(addOptionality(getTypeFromTypeNode(type.declaration.type), !!(getMappedTypeModifiers(type) & 4)), type.mapper || identityMapper) :
                     errorType);
         }
         function getConstraintDeclarationForMappedType(type) {
             return type.declaration.typeParameter.constraint;
         }
         function isMappedTypeWithKeyofConstraintDeclaration(type) {
-            var constraintDeclaration = getConstraintDeclarationForMappedType(type); // TODO: GH#18217
-            return constraintDeclaration.kind === 175 /* TypeOperator */ &&
-                constraintDeclaration.operator === 128 /* KeyOfKeyword */;
+            var constraintDeclaration = getConstraintDeclarationForMappedType(type);
+            return constraintDeclaration.kind === 175 &&
+                constraintDeclaration.operator === 128;
         }
         function getModifiersTypeFromMappedType(type) {
             if (!type.modifiersType) {
                 if (isMappedTypeWithKeyofConstraintDeclaration(type)) {
-                    // If the constraint declaration is a 'keyof T' node, the modifiers type is T. We check
-                    // AST nodes here because, when T is a non-generic type, the logic below eagerly resolves
-                    // 'keyof T' to a literal union type and we can't recover T from that type.
                     type.modifiersType = instantiateType(getTypeFromTypeNode(getConstraintDeclarationForMappedType(type).type), type.mapper || identityMapper);
                 }
                 else {
-                    // Otherwise, get the declared constraint type, and if the constraint type is a type parameter,
-                    // get the constraint of that type parameter. If the resulting type is an indexed type 'keyof T',
-                    // the modifiers type is T. Otherwise, the modifiers type is {}.
                     var declaredType = getTypeFromMappedTypeNode(type.declaration);
                     var constraint = getConstraintTypeFromMappedType(declaredType);
-                    var extendedConstraint = constraint && constraint.flags & 65536 /* TypeParameter */ ? getConstraintOfTypeParameter(constraint) : constraint;
-                    type.modifiersType = extendedConstraint && extendedConstraint.flags & 1048576 /* Index */ ? instantiateType(extendedConstraint.type, type.mapper || identityMapper) : emptyObjectType;
+                    var extendedConstraint = constraint && constraint.flags & 65536 ? getConstraintOfTypeParameter(constraint) : constraint;
+                    type.modifiersType = extendedConstraint && extendedConstraint.flags & 1048576 ? instantiateType(extendedConstraint.type, type.mapper || identityMapper) : emptyObjectType;
                 }
             }
             return type.modifiersType;
         }
         function getMappedTypeModifiers(type) {
             var declaration = type.declaration;
-            return (declaration.readonlyToken ? declaration.readonlyToken.kind === 38 /* MinusToken */ ? 2 /* ExcludeReadonly */ : 1 /* IncludeReadonly */ : 0) |
-                (declaration.questionToken ? declaration.questionToken.kind === 38 /* MinusToken */ ? 8 /* ExcludeOptional */ : 4 /* IncludeOptional */ : 0);
+            return (declaration.readonlyToken ? declaration.readonlyToken.kind === 38 ? 2 : 1 : 0) |
+                (declaration.questionToken ? declaration.questionToken.kind === 38 ? 8 : 4 : 0);
         }
         function getMappedTypeOptionality(type) {
             var modifiers = getMappedTypeModifiers(type);
-            return modifiers & 8 /* ExcludeOptional */ ? -1 : modifiers & 4 /* IncludeOptional */ ? 1 : 0;
+            return modifiers & 8 ? -1 : modifiers & 4 ? 1 : 0;
         }
         function getCombinedMappedTypeOptionality(type) {
             var optionality = getMappedTypeOptionality(type);
@@ -35031,51 +28783,47 @@ var ts;
             return optionality || (isGenericMappedType(modifiersType) ? getMappedTypeOptionality(modifiersType) : 0);
         }
         function isPartialMappedType(type) {
-            return !!(ts.getObjectFlags(type) & 32 /* Mapped */ && getMappedTypeModifiers(type) & 4 /* IncludeOptional */);
+            return !!(ts.getObjectFlags(type) & 32 && getMappedTypeModifiers(type) & 4);
         }
         function isGenericMappedType(type) {
-            return !!(ts.getObjectFlags(type) & 32 /* Mapped */) && isGenericIndexType(getConstraintTypeFromMappedType(type));
+            return !!(ts.getObjectFlags(type) & 32) && isGenericIndexType(getConstraintTypeFromMappedType(type));
         }
         function resolveStructuredTypeMembers(type) {
             if (!type.members) {
-                if (type.flags & 131072 /* Object */) {
-                    if (type.objectFlags & 4 /* Reference */) {
+                if (type.flags & 131072) {
+                    if (type.objectFlags & 4) {
                         resolveTypeReferenceMembers(type);
                     }
-                    else if (type.objectFlags & 3 /* ClassOrInterface */) {
+                    else if (type.objectFlags & 3) {
                         resolveClassOrInterfaceMembers(type);
                     }
-                    else if (type.objectFlags & 2048 /* ReverseMapped */) {
+                    else if (type.objectFlags & 2048) {
                         resolveReverseMappedTypeMembers(type);
                     }
-                    else if (type.objectFlags & 16 /* Anonymous */) {
+                    else if (type.objectFlags & 16) {
                         resolveAnonymousTypeMembers(type);
                     }
-                    else if (type.objectFlags & 32 /* Mapped */) {
+                    else if (type.objectFlags & 32) {
                         resolveMappedTypeMembers(type);
                     }
                 }
-                else if (type.flags & 262144 /* Union */) {
+                else if (type.flags & 262144) {
                     resolveUnionTypeMembers(type);
                 }
-                else if (type.flags & 524288 /* Intersection */) {
+                else if (type.flags & 524288) {
                     resolveIntersectionTypeMembers(type);
                 }
             }
             return type;
         }
-        /** Return properties of an object type or an empty array for other types */
         function getPropertiesOfObjectType(type) {
-            if (type.flags & 131072 /* Object */) {
+            if (type.flags & 131072) {
                 return resolveStructuredTypeMembers(type).properties;
             }
             return ts.emptyArray;
         }
-        /** If the given type is an object type and that type has a property by the given name,
-         * return the symbol for that property. Otherwise return undefined.
-         */
         function getPropertyOfObjectType(type, name) {
-            if (type.flags & 131072 /* Object */) {
+            if (type.flags & 131072) {
                 var resolved = resolveStructuredTypeMembers(type);
                 var symbol = resolved.members.get(name);
                 if (symbol && symbolIsValue(symbol)) {
@@ -35097,9 +28845,7 @@ var ts;
                             }
                         }
                     }
-                    // The properties of a union type are those that are present in all constituent types, so
-                    // we only need to check the properties of the first type
-                    if (type.flags & 262144 /* Union */) {
+                    if (type.flags & 262144) {
                         break;
                     }
                 }
@@ -35109,13 +28855,13 @@ var ts;
         }
         function getPropertiesOfType(type) {
             type = getApparentType(type);
-            return type.flags & 786432 /* UnionOrIntersection */ ?
+            return type.flags & 786432 ?
                 getPropertiesOfUnionOrIntersectionType(type) :
                 getPropertiesOfObjectType(type);
         }
         function getAllPossiblePropertiesOfTypes(types) {
             var unionType = getUnionType(types);
-            if (!(unionType.flags & 262144 /* Union */)) {
+            if (!(unionType.flags & 262144)) {
                 return getAugmentedPropertiesOfType(unionType);
             }
             var props = ts.createSymbolTable();
@@ -35125,7 +28871,6 @@ var ts;
                     var escapedName = _b[_a].escapedName;
                     if (!props.has(escapedName)) {
                         var prop = createUnionOrIntersectionProperty(unionType, escapedName);
-                        // May be undefined if the property is private
                         if (prop)
                             props.set(escapedName, prop);
                     }
@@ -35134,9 +28879,9 @@ var ts;
             return ts.arrayFrom(props.values());
         }
         function getConstraintOfType(type) {
-            return type.flags & 65536 /* TypeParameter */ ? getConstraintOfTypeParameter(type) :
-                type.flags & 2097152 /* IndexedAccess */ ? getConstraintOfIndexedAccess(type) :
-                    type.flags & 4194304 /* Conditional */ ? getConstraintOfConditionalType(type) :
+            return type.flags & 65536 ? getConstraintOfTypeParameter(type) :
+                type.flags & 2097152 ? getConstraintOfIndexedAccess(type) :
+                    type.flags & 4194304 ? getConstraintOfConditionalType(type) :
                         getBaseConstraintOfType(type);
         }
         function getConstraintOfTypeParameter(typeParameter) {
@@ -35151,23 +28896,18 @@ var ts;
         function getDefaultConstraintOfConditionalType(type) {
             if (!type.resolvedDefaultConstraint) {
                 var rootTrueType = type.root.trueType;
-                var rootTrueConstraint = rootTrueType.flags & 8388608 /* Substitution */ ? rootTrueType.substitute : rootTrueType;
+                var rootTrueConstraint = rootTrueType.flags & 8388608 ? rootTrueType.substitute : rootTrueType;
                 type.resolvedDefaultConstraint = getUnionType([instantiateType(rootTrueConstraint, type.combinedMapper || type.mapper), getFalseTypeFromConditionalType(type)]);
             }
             return type.resolvedDefaultConstraint;
         }
         function getConstraintOfDistributiveConditionalType(type) {
-            // Check if we have a conditional type of the form 'T extends U ? X : Y', where T is a constrained
-            // type parameter. If so, create an instantiation of the conditional type where T is replaced
-            // with its constraint. We do this because if the constraint is a union type it will be distributed
-            // over the conditional type and possibly reduced. For example, 'T extends undefined ? never : T'
-            // removes 'undefined' from T.
             if (type.root.isDistributive) {
                 var constraint = getConstraintOfType(getSimplifiedType(type.checkType));
                 if (constraint) {
                     var mapper = makeUnaryTypeMapper(type.root.checkType, constraint);
                     var instantiated = getConditionalTypeInstantiation(type, combineTypeMappers(mapper, type.mapper));
-                    if (!(instantiated.flags & 32768 /* Never */)) {
+                    if (!(instantiated.flags & 32768)) {
                         return instantiated;
                     }
                 }
@@ -35182,35 +28922,27 @@ var ts;
             var hasDisjointDomainType = false;
             for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
                 var t = _a[_i];
-                if (t.flags & 15794176 /* Instantiable */) {
-                    // We keep following constraints as long as we have an instantiable type that is known
-                    // not to be circular or infinite (hence we stop on index access types).
+                if (t.flags & 15794176) {
                     var constraint = getConstraintOfType(t);
-                    while (constraint && constraint.flags & (65536 /* TypeParameter */ | 1048576 /* Index */ | 4194304 /* Conditional */)) {
+                    while (constraint && constraint.flags & (65536 | 1048576 | 4194304)) {
                         constraint = getConstraintOfType(constraint);
                     }
                     if (constraint) {
-                        // A constraint that isn't a union type implies that the final type would be a non-union
-                        // type as well. Since non-union constraints are of no interest, we can exit here.
-                        if (!(constraint.flags & 262144 /* Union */)) {
+                        if (!(constraint.flags & 262144)) {
                             return undefined;
                         }
                         constraints = ts.append(constraints, constraint);
                     }
                 }
-                else if (t.flags & 16809468 /* DisjointDomains */) {
+                else if (t.flags & 16809468) {
                     hasDisjointDomainType = true;
                 }
             }
-            // If the target is a union type or if we are intersecting with types belonging to one of the
-            // disjoint domans, we may end up producing a constraint that hasn't been examined before.
             if (constraints && (targetIsUnion || hasDisjointDomainType)) {
                 if (hasDisjointDomainType) {
-                    // We add any types belong to one of the disjoint domans because they might cause the final
-                    // intersection operation to reduce the union constraints.
                     for (var _b = 0, _c = type.types; _b < _c.length; _b++) {
                         var t = _c[_b];
-                        if (t.flags & 16809468 /* DisjointDomains */) {
+                        if (t.flags & 16809468) {
                             constraints = ts.append(constraints, t);
                         }
                     }
@@ -35220,7 +28952,7 @@ var ts;
             return undefined;
         }
         function getBaseConstraintOfInstantiableNonPrimitiveUnionOrIntersection(type) {
-            if (type.flags & (14745600 /* InstantiableNonPrimitive */ | 786432 /* UnionOrIntersection */)) {
+            if (type.flags & (14745600 | 786432)) {
                 var constraint = getResolvedBaseConstraint(type);
                 if (constraint !== noConstraintType && constraint !== circularConstraintType) {
                     return constraint;
@@ -35229,26 +28961,17 @@ var ts;
         }
         function getBaseConstraintOfType(type) {
             var constraint = getBaseConstraintOfInstantiableNonPrimitiveUnionOrIntersection(type);
-            if (!constraint && type.flags & 1048576 /* Index */) {
+            if (!constraint && type.flags & 1048576) {
                 return keyofConstraintType;
             }
             return constraint;
         }
-        /**
-         * This is similar to `getBaseConstraintOfType` except it returns the input type if there's no base constraint, instead of `undefined`
-         * It also doesn't map indexes to `string`, as where this is used this would be unneeded (and likely undesirable)
-         */
         function getBaseConstraintOrType(type) {
             return getBaseConstraintOfType(type) || type;
         }
         function hasNonCircularBaseConstraint(type) {
             return getResolvedBaseConstraint(type) !== circularConstraintType;
         }
-        /**
-         * Return the resolved base constraint of a type variable. The noConstraintType singleton is returned if the
-         * type variable has no constraint, and the circularConstraintType singleton is returned if the constraint
-         * circularly references the type variable.
-         */
         function getResolvedBaseConstraint(type) {
             var circular;
             if (!type.resolvedBaseConstraint) {
@@ -35257,7 +28980,7 @@ var ts;
             }
             return type.resolvedBaseConstraint;
             function getBaseConstraint(t) {
-                if (!pushTypeResolution(t, 4 /* ResolvedBaseConstraint */)) {
+                if (!pushTypeResolution(t, 4)) {
                     circular = true;
                     return undefined;
                 }
@@ -35269,13 +28992,13 @@ var ts;
                 return result;
             }
             function computeBaseConstraint(t) {
-                if (t.flags & 65536 /* TypeParameter */) {
+                if (t.flags & 65536) {
                     var constraint = getConstraintFromTypeParameter(t);
                     return t.isThisType || !constraint ?
                         constraint :
                         getBaseConstraint(constraint);
                 }
-                if (t.flags & 786432 /* UnionOrIntersection */) {
+                if (t.flags & 786432) {
                     var types = t.types;
                     var baseTypes = [];
                     for (var _i = 0, types_4 = types; _i < types_4.length; _i++) {
@@ -35285,24 +29008,24 @@ var ts;
                             baseTypes.push(baseType);
                         }
                     }
-                    return t.flags & 262144 /* Union */ && baseTypes.length === types.length ? getUnionType(baseTypes) :
-                        t.flags & 524288 /* Intersection */ && baseTypes.length ? getIntersectionType(baseTypes) :
+                    return t.flags & 262144 && baseTypes.length === types.length ? getUnionType(baseTypes) :
+                        t.flags & 524288 && baseTypes.length ? getIntersectionType(baseTypes) :
                             undefined;
                 }
-                if (t.flags & 1048576 /* Index */) {
+                if (t.flags & 1048576) {
                     return keyofConstraintType;
                 }
-                if (t.flags & 2097152 /* IndexedAccess */) {
+                if (t.flags & 2097152) {
                     var baseObjectType = getBaseConstraint(t.objectType);
                     var baseIndexType = getBaseConstraint(t.indexType);
                     var baseIndexedAccess = baseObjectType && baseIndexType ? getIndexedAccessType(baseObjectType, baseIndexType) : undefined;
                     return baseIndexedAccess && baseIndexedAccess !== errorType ? getBaseConstraint(baseIndexedAccess) : undefined;
                 }
-                if (t.flags & 4194304 /* Conditional */) {
+                if (t.flags & 4194304) {
                     var constraint = getConstraintOfConditionalType(t);
                     return constraint && getBaseConstraint(constraint);
                 }
-                if (t.flags & 8388608 /* Substitution */) {
+                if (t.flags & 8388608) {
                     return getBaseConstraint(t.substitute);
                 }
                 if (isGenericMappedType(t)) {
@@ -35312,7 +29035,7 @@ var ts;
             }
         }
         function getApparentTypeOfIntersectionType(type) {
-            return type.resolvedApparentType || (type.resolvedApparentType = getTypeWithThisArgument(type, type, /*apparentType*/ true));
+            return type.resolvedApparentType || (type.resolvedApparentType = getTypeWithThisArgument(type, type, true));
         }
         function getResolvedTypeParameterDefault(typeParameter) {
             if (!typeParameter.default) {
@@ -35321,29 +29044,19 @@ var ts;
                     typeParameter.default = targetDefault ? instantiateType(targetDefault, typeParameter.mapper) : noConstraintType;
                 }
                 else {
-                    // To block recursion, set the initial value to the resolvingDefaultType.
                     typeParameter.default = resolvingDefaultType;
                     var defaultDeclaration = typeParameter.symbol && ts.forEach(typeParameter.symbol.declarations, function (decl) { return ts.isTypeParameterDeclaration(decl) && decl.default; });
                     var defaultType = defaultDeclaration ? getTypeFromTypeNode(defaultDeclaration) : noConstraintType;
                     if (typeParameter.default === resolvingDefaultType) {
-                        // If we have not been called recursively, set the correct default type.
                         typeParameter.default = defaultType;
                     }
                 }
             }
             else if (typeParameter.default === resolvingDefaultType) {
-                // If we are called recursively for this type parameter, mark the default as circular.
                 typeParameter.default = circularConstraintType;
             }
             return typeParameter.default;
         }
-        /**
-         * Gets the default type for a type parameter.
-         *
-         * If the type parameter is the result of an instantiation, this gets the instantiated
-         * default type of its target. If the type parameter has no default type or the default is
-         * circular, `undefined` is returned.
-         */
         function getDefaultFromTypeParameter(typeParameter) {
             var defaultType = getResolvedTypeParameterDefault(typeParameter);
             return defaultType !== noConstraintType && defaultType !== circularConstraintType ? defaultType : undefined;
@@ -35351,35 +29064,26 @@ var ts;
         function hasNonCircularTypeParameterDefault(typeParameter) {
             return getResolvedTypeParameterDefault(typeParameter) !== circularConstraintType;
         }
-        /**
-         * Indicates whether the declaration of a typeParameter has a default type.
-         */
         function hasTypeParameterDefault(typeParameter) {
             return !!(typeParameter.symbol && ts.forEach(typeParameter.symbol.declarations, function (decl) { return ts.isTypeParameterDeclaration(decl) && decl.default; }));
         }
-        /**
-         * For a type parameter, return the base constraint of the type parameter. For the string, number,
-         * boolean, and symbol primitive types, return the corresponding object types. Otherwise return the
-         * type itself. Note that the apparent type of a union type is the union type itself.
-         */
         function getApparentType(type) {
-            var t = type.flags & 15794176 /* Instantiable */ ? getBaseConstraintOfType(type) || emptyObjectType : type;
-            return t.flags & 524288 /* Intersection */ ? getApparentTypeOfIntersectionType(t) :
-                t.flags & 68 /* StringLike */ ? globalStringType :
-                    t.flags & 168 /* NumberLike */ ? globalNumberType :
-                        t.flags & 272 /* BooleanLike */ ? globalBooleanType :
-                            t.flags & 3072 /* ESSymbolLike */ ? getGlobalESSymbolType(/*reportErrors*/ languageVersion >= 2 /* ES2015 */) :
-                                t.flags & 16777216 /* NonPrimitive */ ? emptyObjectType :
-                                    t.flags & 1048576 /* Index */ ? keyofConstraintType :
+            var t = type.flags & 15794176 ? getBaseConstraintOfType(type) || emptyObjectType : type;
+            return t.flags & 524288 ? getApparentTypeOfIntersectionType(t) :
+                t.flags & 68 ? globalStringType :
+                    t.flags & 168 ? globalNumberType :
+                        t.flags & 272 ? globalBooleanType :
+                            t.flags & 3072 ? getGlobalESSymbolType(languageVersion >= 2) :
+                                t.flags & 16777216 ? emptyObjectType :
+                                    t.flags & 1048576 ? keyofConstraintType :
                                         t;
         }
         function createUnionOrIntersectionProperty(containingType, name) {
             var props;
-            var isUnion = containingType.flags & 262144 /* Union */;
-            var excludeModifiers = isUnion ? 24 /* NonPublicAccessibilityModifier */ : 0;
-            // Flags we want to propagate to the result if they exist in all source symbols
-            var commonFlags = isUnion ? 0 /* None */ : 16777216 /* Optional */;
-            var syntheticFlag = 4 /* SyntheticMethod */;
+            var isUnion = containingType.flags & 262144;
+            var excludeModifiers = isUnion ? 24 : 0;
+            var commonFlags = isUnion ? 0 : 16777216;
+            var syntheticFlag = 4;
             var checkFlags = 0;
             for (var _i = 0, _a = containingType.types; _i < _a.length; _i++) {
                 var current = _a[_i];
@@ -35390,24 +29094,24 @@ var ts;
                     if (prop && !(modifiers & excludeModifiers)) {
                         commonFlags &= prop.flags;
                         props = ts.appendIfUnique(props, prop);
-                        checkFlags |= (isReadonlySymbol(prop) ? 8 /* Readonly */ : 0) |
-                            (!(modifiers & 24 /* NonPublicAccessibilityModifier */) ? 64 /* ContainsPublic */ : 0) |
-                            (modifiers & 16 /* Protected */ ? 128 /* ContainsProtected */ : 0) |
-                            (modifiers & 8 /* Private */ ? 256 /* ContainsPrivate */ : 0) |
-                            (modifiers & 32 /* Static */ ? 512 /* ContainsStatic */ : 0);
+                        checkFlags |= (isReadonlySymbol(prop) ? 8 : 0) |
+                            (!(modifiers & 24) ? 64 : 0) |
+                            (modifiers & 16 ? 128 : 0) |
+                            (modifiers & 8 ? 256 : 0) |
+                            (modifiers & 32 ? 512 : 0);
                         if (!isPrototypeProperty(prop)) {
-                            syntheticFlag = 2 /* SyntheticProperty */;
+                            syntheticFlag = 2;
                         }
                     }
                     else if (isUnion) {
-                        checkFlags |= 16 /* Partial */;
+                        checkFlags |= 16;
                     }
                 }
             }
             if (!props) {
                 return undefined;
             }
-            if (props.length === 1 && !(checkFlags & 16 /* Partial */)) {
+            if (props.length === 1 && !(checkFlags & 16)) {
                 return props[0];
             }
             var declarations;
@@ -35434,12 +29138,12 @@ var ts;
                 }
                 else {
                     if (type !== commonType) {
-                        checkFlags |= 32 /* HasNonUniformType */;
+                        checkFlags |= 32;
                     }
                 }
                 propTypes.push(type);
             }
-            var result = createSymbol(4 /* Property */ | commonFlags, name, syntheticFlag | checkFlags);
+            var result = createSymbol(4 | commonFlags, name, syntheticFlag | checkFlags);
             result.containingType = containingType;
             if (!hasNonUniformValueDeclaration && commonValueDeclaration) {
                 result.valueDeclaration = commonValueDeclaration;
@@ -35449,11 +29153,6 @@ var ts;
             result.type = isUnion ? getUnionType(propTypes) : getIntersectionType(propTypes);
             return result;
         }
-        // Return the symbol for a given property in a union or intersection type, or undefined if the property
-        // does not exist in any constituent type. Note that the returned property may only be present in some
-        // constituents, in which case the isPartial flag is set when the containing type is union type. We need
-        // these partial properties when identifying discriminant properties, but otherwise they are filtered out
-        // and do not appear to be present in the union type.
         function getUnionOrIntersectionProperty(type, name) {
             var properties = type.propertyCache || (type.propertyCache = ts.createSymbolTable());
             var property = properties.get(name);
@@ -35467,20 +29166,11 @@ var ts;
         }
         function getPropertyOfUnionOrIntersectionType(type, name) {
             var property = getUnionOrIntersectionProperty(type, name);
-            // We need to filter out partial properties in union types
-            return property && !(ts.getCheckFlags(property) & 16 /* Partial */) ? property : undefined;
-        }
-        /**
-         * Return the symbol for the property with the given name in the given type. Creates synthetic union properties when
-         * necessary, maps primitive types and type parameters are to their apparent types, and augments with properties from
-         * Object and Function as appropriate.
-         *
-         * @param type a type to look up property from
-         * @param name a name of property to look up in a given type
-         */
+            return property && !(ts.getCheckFlags(property) & 16) ? property : undefined;
+        }
         function getPropertyOfType(type, name) {
             type = getApparentType(type);
-            if (type.flags & 131072 /* Object */) {
+            if (type.flags & 131072) {
                 var resolved = resolveStructuredTypeMembers(type);
                 var symbol = resolved.members.get(name);
                 if (symbol && symbolIsValue(symbol)) {
@@ -35494,42 +29184,34 @@ var ts;
                 }
                 return getPropertyOfObjectType(globalObjectType, name);
             }
-            if (type.flags & 786432 /* UnionOrIntersection */) {
+            if (type.flags & 786432) {
                 return getPropertyOfUnionOrIntersectionType(type, name);
             }
             return undefined;
         }
         function getSignaturesOfStructuredType(type, kind) {
-            if (type.flags & 917504 /* StructuredType */) {
+            if (type.flags & 917504) {
                 var resolved = resolveStructuredTypeMembers(type);
-                return kind === 0 /* Call */ ? resolved.callSignatures : resolved.constructSignatures;
+                return kind === 0 ? resolved.callSignatures : resolved.constructSignatures;
             }
             return ts.emptyArray;
         }
-        /**
-         * Return the signatures of the given kind in the given type. Creates synthetic union signatures when necessary and
-         * maps primitive types and type parameters are to their apparent types.
-         */
         function getSignaturesOfType(type, kind) {
             return getSignaturesOfStructuredType(getApparentType(type), kind);
         }
         function getIndexInfoOfStructuredType(type, kind) {
-            if (type.flags & 917504 /* StructuredType */) {
+            if (type.flags & 917504) {
                 var resolved = resolveStructuredTypeMembers(type);
-                return kind === 0 /* String */ ? resolved.stringIndexInfo : resolved.numberIndexInfo;
+                return kind === 0 ? resolved.stringIndexInfo : resolved.numberIndexInfo;
             }
         }
         function getIndexTypeOfStructuredType(type, kind) {
             var info = getIndexInfoOfStructuredType(type, kind);
             return info && info.type;
         }
-        // Return the indexing info of the given kind in the given type. Creates synthetic union index types when necessary and
-        // maps primitive types and type parameters are to their apparent types.
         function getIndexInfoOfType(type, kind) {
             return getIndexInfoOfStructuredType(getApparentType(type), kind);
         }
-        // Return the index type of the given kind in the given type. Creates synthetic union index types when necessary and
-        // maps primitive types and type parameters are to their apparent types.
         function getIndexTypeOfType(type, kind) {
             return getIndexTypeOfStructuredType(getApparentType(type), kind);
         }
@@ -35538,18 +29220,16 @@ var ts;
                 var propTypes = [];
                 for (var _i = 0, _a = getPropertiesOfType(type); _i < _a.length; _i++) {
                     var prop = _a[_i];
-                    if (kind === 0 /* String */ || isNumericLiteralName(prop.escapedName)) {
+                    if (kind === 0 || isNumericLiteralName(prop.escapedName)) {
                         propTypes.push(getTypeOfSymbol(prop));
                     }
                 }
                 if (propTypes.length) {
-                    return getUnionType(propTypes, 2 /* Subtype */);
+                    return getUnionType(propTypes, 2);
                 }
             }
             return undefined;
         }
-        // Return list of type parameters with duplicates removed (duplicate identifier errors are generated in the actual
-        // type checking functions).
         function getTypeParametersFromDeclaration(declaration) {
             var result;
             for (var _i = 0, _a = ts.getEffectiveTypeParameterDeclarations(declaration); _i < _a.length; _i++) {
@@ -35568,20 +29248,17 @@ var ts;
             return result;
         }
         function isJSDocOptionalParameter(node) {
-            return ts.isInJavaScriptFile(node) && (
-            // node.type should only be a JSDocOptionalType when node is a parameter of a JSDocFunctionType
-            node.type && node.type.kind === 283 /* JSDocOptionalType */
+            return ts.isInJavaScriptFile(node) && (node.type && node.type.kind === 283
                 || ts.getJSDocParameterTags(node).some(function (_a) {
                     var isBracketed = _a.isBracketed, typeExpression = _a.typeExpression;
-                    return isBracketed || !!typeExpression && typeExpression.type.kind === 283 /* JSDocOptionalType */;
+                    return isBracketed || !!typeExpression && typeExpression.type.kind === 283;
                 }));
         }
         function tryFindAmbientModule(moduleName, withAugmentations) {
             if (ts.isExternalModuleNameRelative(moduleName)) {
                 return undefined;
             }
-            var symbol = getSymbol(globals, '"' + moduleName + '"', 512 /* ValueModule */);
-            // merged symbol is module declaration symbol combined with all augmentations
+            var symbol = getSymbol(globals, '"' + moduleName + '"', 512);
             return symbol && withAugmentations ? getMergedSymbol(symbol) : symbol;
         }
         function isOptionalParameter(node) {
@@ -35607,29 +29284,24 @@ var ts;
                 return false;
             }
             var isBracketed = node.isBracketed, typeExpression = node.typeExpression;
-            return isBracketed || !!typeExpression && typeExpression.type.kind === 283 /* JSDocOptionalType */;
+            return isBracketed || !!typeExpression && typeExpression.type.kind === 283;
         }
         function createTypePredicateFromTypePredicateNode(node) {
             var parameterName = node.parameterName;
             var type = getTypeFromTypeNode(node.type);
-            if (parameterName.kind === 71 /* Identifier */) {
-                return createIdentifierTypePredicate(parameterName && parameterName.escapedText, // TODO: GH#18217
-                parameterName && getTypePredicateParameterIndex(node.parent.parameters, parameterName), type);
+            if (parameterName.kind === 71) {
+                return createIdentifierTypePredicate(parameterName && parameterName.escapedText, parameterName && getTypePredicateParameterIndex(node.parent.parameters, parameterName), type);
             }
             else {
                 return createThisTypePredicate(type);
             }
         }
         function createIdentifierTypePredicate(parameterName, parameterIndex, type) {
-            return { kind: 1 /* Identifier */, parameterName: parameterName, parameterIndex: parameterIndex, type: type };
+            return { kind: 1, parameterName: parameterName, parameterIndex: parameterIndex, type: type };
         }
         function createThisTypePredicate(type) {
-            return { kind: 0 /* This */, type: type };
+            return { kind: 0, type: type };
         }
-        /**
-         * Gets the minimum number of type arguments needed to satisfy all non-optional type
-         * parameters.
-         */
         function getMinTypeArgumentCount(typeParameters) {
             var minTypeArgumentCount = 0;
             if (typeParameters) {
@@ -35649,9 +29321,6 @@ var ts;
                     if (!typeArguments) {
                         typeArguments = [];
                     }
-                    // Map an unsatisfied type parameter with a default type.
-                    // If a type parameter does not have a default type, or if the default type
-                    // is a forward reference, the empty object type is used.
                     for (var i = numTypeArguments; i < numTypeParameters; i++) {
                         typeArguments[i] = getDefaultTypeArgumentType(isJavaScriptImplicitAny);
                     }
@@ -35683,16 +29352,12 @@ var ts;
                     ts.isValueSignatureDeclaration(declaration) &&
                     !ts.hasJSDocParameterTags(declaration) &&
                     !ts.getJSDocType(declaration);
-                // If this is a JSDoc construct signature, then skip the first parameter in the
-                // parameter list.  The first parameter represents the return type of the construct
-                // signature.
                 for (var i = isJSConstructSignature ? 1 : 0; i < declaration.parameters.length; i++) {
                     var param = declaration.parameters[i];
                     var paramSymbol = param.symbol;
                     var type = ts.isJSDocParameterTag(param) ? (param.typeExpression && param.typeExpression.type) : param.type;
-                    // Include parameter symbol instead of property symbol in the signature
-                    if (paramSymbol && !!(paramSymbol.flags & 4 /* Property */) && !ts.isBindingPattern(param.name)) {
-                        var resolvedSymbol = resolveName(param, paramSymbol.escapedName, 67216319 /* Value */, undefined, undefined, /*isUse*/ false);
+                    if (paramSymbol && !!(paramSymbol.flags & 4) && !ts.isBindingPattern(param.name)) {
+                        var resolvedSymbol = resolveName(param, paramSymbol.escapedName, 67216319, undefined, undefined, false);
                         paramSymbol = resolvedSymbol;
                     }
                     if (i === 0 && paramSymbol.escapedName === "this") {
@@ -35702,10 +29367,9 @@ var ts;
                     else {
                         parameters.push(paramSymbol);
                     }
-                    if (type && type.kind === 178 /* LiteralType */) {
+                    if (type && type.kind === 178) {
                         hasLiteralTypes = true;
                     }
-                    // Record a new minimum argument count if this is not an optional parameter
                     var isOptionalParameter_1 = isOptionalJSDocParameterTag(param) ||
                         param.initializer || param.questionToken || param.dotDotDotToken ||
                         iife && parameters.length > iife.arguments.length && !type ||
@@ -35715,32 +29379,25 @@ var ts;
                         minArgumentCount = parameters.length;
                     }
                 }
-                // If only one accessor includes a this-type annotation, the other behaves as if it had the same type annotation
-                if ((declaration.kind === 156 /* GetAccessor */ || declaration.kind === 157 /* SetAccessor */) &&
+                if ((declaration.kind === 156 || declaration.kind === 157) &&
                     !hasNonBindableDynamicName(declaration) &&
                     (!hasThisParameter || !thisParameter)) {
-                    var otherKind = declaration.kind === 156 /* GetAccessor */ ? 157 /* SetAccessor */ : 156 /* GetAccessor */;
+                    var otherKind = declaration.kind === 156 ? 157 : 156;
                     var other = ts.getDeclarationOfKind(getSymbolOfNode(declaration), otherKind);
                     if (other) {
                         thisParameter = getAnnotatedAccessorThisParameter(other);
                     }
                 }
-                var classType = declaration.kind === 155 /* Constructor */ ?
+                var classType = declaration.kind === 155 ?
                     getDeclaredTypeOfClassOrInterface(getMergedSymbol(declaration.parent.symbol))
                     : undefined;
                 var typeParameters = classType ? classType.localTypeParameters : getTypeParametersFromDeclaration(declaration);
                 var returnType = getSignatureReturnTypeFromDeclaration(declaration, isJSConstructSignature, classType);
                 var hasRestLikeParameter = ts.hasRestParameter(declaration) || ts.isInJavaScriptFile(declaration) && maybeAddJsSyntheticRestParameter(declaration, parameters);
-                links.resolvedSignature = createSignature(declaration, typeParameters, thisParameter, parameters, returnType, /*resolvedTypePredicate*/ undefined, minArgumentCount, hasRestLikeParameter, hasLiteralTypes);
+                links.resolvedSignature = createSignature(declaration, typeParameters, thisParameter, parameters, returnType, undefined, minArgumentCount, hasRestLikeParameter, hasLiteralTypes);
             }
             return links.resolvedSignature;
         }
-        /**
-         * A JS function gets a synthetic rest parameter if it references `arguments` AND:
-         * 1. It has no parameters but at least one `@param` with a type that starts with `...`
-         * OR
-         * 2. It has at least one parameter, and the last parameter has a matching `@param` with a type that starts with `...`
-         */
         function maybeAddJsSyntheticRestParameter(declaration, parameters) {
             if (ts.isJSDocSignature(declaration) || !containsArgumentsReference(declaration)) {
                 return false;
@@ -35750,11 +29407,10 @@ var ts;
             var lastParamVariadicType = ts.firstDefined(lastParamTags, function (p) {
                 return p.typeExpression && ts.isJSDocVariadicType(p.typeExpression.type) ? p.typeExpression.type : undefined;
             });
-            var syntheticArgsSymbol = createSymbol(3 /* Variable */, "args");
+            var syntheticArgsSymbol = createSymbol(3, "args");
             syntheticArgsSymbol.type = lastParamVariadicType ? createArrayType(getTypeFromTypeNode(lastParamVariadicType.type)) : anyArrayType;
             syntheticArgsSymbol.isRestParameter = true;
             if (lastParamVariadicType) {
-                // Replace the last parameter with a rest parameter.
                 parameters.pop();
             }
             parameters.push(syntheticArgsSymbol);
@@ -35762,7 +29418,7 @@ var ts;
         }
         function getSignatureReturnTypeFromDeclaration(declaration, isJSConstructSignature, classType) {
             if (isJSConstructSignature) {
-                return getTypeFromTypeNode(declaration.parameters[0].type); // TODO: GH#18217
+                return getTypeFromTypeNode(declaration.parameters[0].type);
             }
             else if (classType) {
                 return classType;
@@ -35771,10 +29427,8 @@ var ts;
             if (typeNode) {
                 return getTypeFromTypeNode(typeNode);
             }
-            // TypeScript 1.0 spec (April 2014):
-            // If only one accessor includes a type annotation, the other behaves as if it had the same type annotation.
-            if (declaration.kind === 156 /* GetAccessor */ && !hasNonBindableDynamicName(declaration)) {
-                var setter = ts.getDeclarationOfKind(getSymbolOfNode(declaration), 157 /* SetAccessor */);
+            if (declaration.kind === 156 && !hasNonBindableDynamicName(declaration)) {
+                var setter = ts.getDeclarationOfKind(getSymbolOfNode(declaration), 157);
                 return getAnnotatedAccessorType(setter);
             }
             if (ts.nodeIsMissing(declaration.body)) {
@@ -35784,7 +29438,7 @@ var ts;
         function containsArgumentsReference(declaration) {
             var links = getNodeLinks(declaration);
             if (links.containsArgumentsReference === undefined) {
-                if (links.flags & 8192 /* CaptureArguments */) {
+                if (links.flags & 8192) {
                     links.containsArgumentsReference = true;
                 }
                 else {
@@ -35796,13 +29450,13 @@ var ts;
                 if (!node)
                     return false;
                 switch (node.kind) {
-                    case 71 /* Identifier */:
+                    case 71:
                         return node.escapedText === "arguments" && ts.isExpressionNode(node);
-                    case 152 /* PropertyDeclaration */:
-                    case 154 /* MethodDeclaration */:
-                    case 156 /* GetAccessor */:
-                    case 157 /* SetAccessor */:
-                        return node.name.kind === 147 /* ComputedPropertyName */
+                    case 152:
+                    case 154:
+                    case 156:
+                    case 157:
+                        return node.name.kind === 147
                             && traverse(node.name);
                     default:
                         return !ts.nodeStartsNewLexicalEnvironment(node) && !ts.isPartOfTypeNode(node) && !!ts.forEachChild(node, traverse);
@@ -35817,9 +29471,6 @@ var ts;
                 var decl = symbol.declarations[i];
                 if (!ts.isFunctionLike(decl))
                     continue;
-                // Don't include signature if node is the implementation of an overloaded function. A node is considered
-                // an implementation node if it has a body and the previous node is of the same kind and immediately
-                // precedes the implementation node (i.e. has the same parent and ends where the implementation starts).
                 if (i > 0 && decl.body) {
                     var previous = symbol.declarations[i - 1];
                     if (decl.parent === previous.parent && decl.kind === previous.kind && decl.pos === previous.end) {
@@ -35859,7 +29510,7 @@ var ts;
                 }
                 else {
                     var declaration = signature.declaration;
-                    signature.resolvedTypePredicate = declaration && declaration.type && declaration.type.kind === 161 /* TypePredicate */ ?
+                    signature.resolvedTypePredicate = declaration && declaration.type && declaration.type.kind === 161 ?
                         createTypePredicateFromTypePredicateNode(declaration.type) :
                         noTypePredicate;
                 }
@@ -35869,7 +29520,7 @@ var ts;
         }
         function getReturnTypeOfSignature(signature) {
             if (!signature.resolvedReturnType) {
-                if (!pushTypeResolution(signature, 3 /* ResolvedReturnType */)) {
+                if (!pushTypeResolution(signature, 3)) {
                     return errorType;
                 }
                 var type = void 0;
@@ -35877,7 +29528,7 @@ var ts;
                     type = instantiateType(getReturnTypeOfSignature(signature.target), signature.mapper);
                 }
                 else if (signature.unionSignatures) {
-                    type = getUnionType(ts.map(signature.unionSignatures, getReturnTypeOfSignature), 2 /* Subtype */);
+                    type = getUnionType(ts.map(signature.unionSignatures, getReturnTypeOfSignature), 2);
                 }
                 else {
                     type = getReturnTypeFromBody(signature.declaration);
@@ -35900,12 +29551,12 @@ var ts;
             return signature.resolvedReturnType;
         }
         function isResolvingReturnTypeOfSignature(signature) {
-            return !signature.resolvedReturnType && findResolutionCycleStartIndex(signature, 3 /* ResolvedReturnType */) >= 0;
+            return !signature.resolvedReturnType && findResolutionCycleStartIndex(signature, 3) >= 0;
         }
         function getRestTypeOfSignature(signature) {
             if (signature.hasRestParameter) {
                 var type = getTypeOfSymbol(ts.last(signature.parameters));
-                if (ts.getObjectFlags(type) & 4 /* Reference */ && type.target === globalArrayType) {
+                if (ts.getObjectFlags(type) & 4 && type.target === globalArrayType) {
                     return type.typeArguments[0];
                 }
             }
@@ -35922,7 +29573,7 @@ var ts;
             return instantiation;
         }
         function createSignatureInstantiation(signature, typeArguments) {
-            return instantiateSignature(signature, createSignatureTypeMapper(signature, typeArguments), /*eraseTypeParameters*/ true);
+            return instantiateSignature(signature, createSignatureTypeMapper(signature, typeArguments), true);
         }
         function createSignatureTypeMapper(signature, typeArguments) {
             return createTypeMapper(signature.typeParameters, typeArguments);
@@ -35933,8 +29584,7 @@ var ts;
                 signature;
         }
         function createErasedSignature(signature) {
-            // Create an instantiation of the signature where all type arguments are the any type.
-            return instantiateSignature(signature, createTypeEraser(signature.typeParameters), /*eraseTypeParameters*/ true);
+            return instantiateSignature(signature, createTypeEraser(signature.typeParameters), true);
         }
         function getCanonicalSignature(signature) {
             return signature.typeParameters ?
@@ -35942,12 +29592,6 @@ var ts;
                 signature;
         }
         function createCanonicalSignature(signature) {
-            // Create an instantiation of the signature where each unconstrained type parameter is replaced with
-            // its original. When a generic class or interface is instantiated, each generic method in the class or
-            // interface is instantiated with a fresh set of cloned type parameters (which we need to handle scenarios
-            // where different generations of the same type parameter are in scope). This leads to a lot of new type
-            // identities, and potentially a lot of work comparing those identities, so here we create an instantiation
-            // that uses the original type identities for all unconstrained type parameters.
             return getSignatureInstantiation(signature, ts.map(signature.typeParameters, function (tp) { return tp.target && !getConstraintOfTypeParameter(tp.target) ? tp.target : tp; }), ts.isInJavaScriptFile(signature.declaration));
         }
         function getBaseSignature(signature) {
@@ -35955,18 +29599,14 @@ var ts;
             if (typeParameters) {
                 var typeEraser_1 = createTypeEraser(typeParameters);
                 var baseConstraints = ts.map(typeParameters, function (tp) { return instantiateType(getBaseConstraintOfType(tp), typeEraser_1) || emptyObjectType; });
-                return instantiateSignature(signature, createTypeMapper(typeParameters, baseConstraints), /*eraseTypeParameters*/ true);
+                return instantiateSignature(signature, createTypeMapper(typeParameters, baseConstraints), true);
             }
             return signature;
         }
         function getOrCreateTypeFromSignature(signature) {
-            // There are two ways to declare a construct signature, one is by declaring a class constructor
-            // using the constructor keyword, and the other is declaring a bare construct signature in an
-            // object type literal or interface (using the new keyword). Each way of declaring a constructor
-            // will result in a different declaration kind.
             if (!signature.isolatedSignatureType) {
-                var isConstructor = signature.declaration.kind === 155 /* Constructor */ || signature.declaration.kind === 159 /* ConstructSignature */; // TODO: GH#18217
-                var type = createObjectType(16 /* Anonymous */);
+                var isConstructor = signature.declaration.kind === 155 || signature.declaration.kind === 159;
+                var type = createObjectType(16);
                 type.members = emptySymbols;
                 type.properties = ts.emptyArray;
                 type.callSignatures = !isConstructor ? [signature] : ts.emptyArray;
@@ -35976,10 +29616,10 @@ var ts;
             return signature.isolatedSignatureType;
         }
         function getIndexSymbol(symbol) {
-            return symbol.members.get("__index" /* Index */);
+            return symbol.members.get("__index");
         }
         function getIndexDeclarationOfSymbol(symbol, kind) {
-            var syntaxKind = kind === 1 /* Number */ ? 134 /* NumberKeyword */ : 137 /* StringKeyword */;
+            var syntaxKind = kind === 1 ? 134 : 137;
             var indexSymbol = getIndexSymbol(symbol);
             if (indexSymbol) {
                 for (var _i = 0, _a = indexSymbol.declarations; _i < _a.length; _i++) {
@@ -36001,12 +29641,12 @@ var ts;
         function getIndexInfoOfSymbol(symbol, kind) {
             var declaration = getIndexDeclarationOfSymbol(symbol, kind);
             if (declaration) {
-                return createIndexInfo(declaration.type ? getTypeFromTypeNode(declaration.type) : anyType, ts.hasModifier(declaration, 64 /* Readonly */), declaration);
+                return createIndexInfo(declaration.type ? getTypeFromTypeNode(declaration.type) : anyType, ts.hasModifier(declaration, 64), declaration);
             }
             return undefined;
         }
         function getConstraintDeclaration(type) {
-            var decl = type.symbol && ts.getDeclarationOfKind(type.symbol, 148 /* TypeParameter */);
+            var decl = type.symbol && ts.getDeclarationOfKind(type.symbol, 148);
             return decl && decl.constraint;
         }
         function getInferredTypeParameterConstraint(typeParameter) {
@@ -36014,11 +29654,7 @@ var ts;
             if (typeParameter.symbol) {
                 for (var _i = 0, _a = typeParameter.symbol.declarations; _i < _a.length; _i++) {
                     var declaration = _a[_i];
-                    // When an 'infer T' declaration is immediately contained in a type reference node
-                    // (such as 'Foo<infer T>'), T's constraint is inferred from the constraint of the
-                    // corresponding type parameter in 'Foo'. When multiple 'infer T' declarations are
-                    // present, we form an intersection of the inferred constraint types.
-                    if (declaration.parent.kind === 172 /* InferType */ && declaration.parent.parent.kind === 162 /* TypeReference */) {
+                    if (declaration.parent.kind === 172 && declaration.parent.parent.kind === 162) {
                         var typeReference = declaration.parent.parent;
                         var typeParameters = getTypeParametersForTypeReference(typeReference);
                         if (typeParameters) {
@@ -36026,12 +29662,6 @@ var ts;
                             if (index < typeParameters.length) {
                                 var declaredConstraint = getConstraintOfTypeParameter(typeParameters[index]);
                                 if (declaredConstraint) {
-                                    // Type parameter constraints can reference other type parameters so
-                                    // constraints need to be instantiated. If instantiation produces the
-                                    // type parameter itself, we discard that inference. For example, in
-                                    //   type Foo<T extends string, U extends T> = [T, U];
-                                    //   type Bar<T> = T extends Foo<infer X, infer X> ? Foo<X, X> : T;
-                                    // the instantiated constraint for U is X, so we discard that inference.
                                     var mapper = createTypeMapper(typeParameters, getEffectiveTypeArguments(typeReference, typeParameters));
                                     var constraint = instantiateType(declaredConstraint, mapper);
                                     if (constraint !== typeParameter) {
@@ -36060,7 +29690,7 @@ var ts;
             return typeParameter.constraint === noConstraintType ? undefined : typeParameter.constraint;
         }
         function getParentSymbolOfTypeParameter(typeParameter) {
-            return getSymbolOfNode(ts.getDeclarationOfKind(typeParameter.symbol, 148 /* TypeParameter */).parent);
+            return getSymbolOfNode(ts.getDeclarationOfKind(typeParameter.symbol, 148).parent);
         }
         function getTypeListId(types) {
             var result = "";
@@ -36085,10 +29715,6 @@ var ts;
             }
             return result;
         }
-        // This function is used to propagate certain flags when creating new object type references and union types.
-        // It is only necessary to do so if a constituent type might be the undefined type, the null type, the type
-        // of an object literal or the anyFunctionType. This is because there are operations in the type checker
-        // that care about the presence of such types at arbitrary depth in a containing type.
         function getPropagatingFlagsOfTypes(types, excludeKinds) {
             var result = 0;
             for (var _i = 0, types_5 = types; _i < types_5.length; _i++) {
@@ -36097,15 +29723,15 @@ var ts;
                     result |= type.flags;
                 }
             }
-            return result & 939524096 /* PropagatingFlags */;
+            return result & 939524096;
         }
         function createTypeReference(target, typeArguments) {
             var id = getTypeListId(typeArguments);
             var type = target.instantiations.get(id);
             if (!type) {
-                type = createObjectType(4 /* Reference */, target.symbol);
+                type = createObjectType(4, target.symbol);
                 target.instantiations.set(id, type);
-                type.flags |= typeArguments ? getPropagatingFlagsOfTypes(typeArguments, /*excludeKinds*/ 0) : 0;
+                type.flags |= typeArguments ? getPropagatingFlagsOfTypes(typeArguments, 0) : 0;
                 type.target = target;
                 type.typeArguments = typeArguments;
             }
@@ -36122,9 +29748,6 @@ var ts;
         function getTypeReferenceArity(type) {
             return ts.length(type.target.typeParameters);
         }
-        /**
-         * Get type from type-reference that reference to class or interface
-         */
         function getTypeFromClassOrInterfaceReference(node, symbol, typeArgs) {
             var type = getDeclaredTypeOfSymbol(getMergedSymbol(symbol));
             var typeParameters = type.localTypeParameters;
@@ -36134,7 +29757,7 @@ var ts;
                 var isJs = ts.isInJavaScriptFile(node);
                 var isJsImplicitAny = !noImplicitAny && isJs;
                 if (!isJsImplicitAny && (numTypeArguments < minTypeArgumentCount || numTypeArguments > typeParameters.length)) {
-                    var missingAugmentsTag = isJs && node.parent.kind !== 290 /* JSDocAugmentsTag */;
+                    var missingAugmentsTag = isJs && node.parent.kind !== 290;
                     var diag = minTypeArgumentCount === typeParameters.length
                         ? missingAugmentsTag
                             ? ts.Diagnostics.Expected_0_type_arguments_provide_these_with_an_extends_tag
@@ -36142,16 +29765,12 @@ var ts;
                         : missingAugmentsTag
                             ? ts.Diagnostics.Expected_0_1_type_arguments_provide_these_with_an_extends_tag
                             : ts.Diagnostics.Generic_type_0_requires_between_1_and_2_type_arguments;
-                    var typeStr = typeToString(type, /*enclosingDeclaration*/ undefined, 2 /* WriteArrayAsGenericType */);
+                    var typeStr = typeToString(type, undefined, 2);
                     error(node, diag, typeStr, minTypeArgumentCount, typeParameters.length);
                     if (!isJs) {
-                        // TODO: Adopt same permissive behavior in TS as in JS to reduce follow-on editing experience failures (requires editing fillMissingTypeArguments)
                         return errorType;
                     }
                 }
-                // In a type reference, the outer type parameters of the referenced class or interface are automatically
-                // supplied as type arguments and the type reference only specifies arguments for the local type parameters
-                // of the class or interface.
                 var typeArguments = ts.concatenate(type.outerTypeParameters, fillMissingTypeArguments(typeArgs, typeParameters, minTypeArgumentCount, isJs));
                 return createTypeReference(type, typeArguments);
             }
@@ -36168,11 +29787,6 @@ var ts;
             }
             return instantiation;
         }
-        /**
-         * Get type from reference to type alias. When a type alias is generic, the declared type of the type alias may include
-         * references to the type parameters of the alias. We replace those with the actual type arguments by instantiating the
-         * declared type. Instantiations are cached using the type identities of the type arguments as the key.
-         */
         function getTypeFromTypeAliasReference(node, symbol, typeArguments) {
             var type = getDeclaredTypeOfSymbol(symbol);
             var typeParameters = getSymbolLinks(symbol).typeParameters;
@@ -36191,16 +29805,13 @@ var ts;
         }
         function getTypeReferenceName(node) {
             switch (node.kind) {
-                case 162 /* TypeReference */:
+                case 162:
                     return node.typeName;
-                case 207 /* ExpressionWithTypeArguments */:
-                    // We only support expressions that are simple qualified names. For other
-                    // expressions this produces undefined.
+                case 207:
                     var expr = node.expression;
                     if (ts.isEntityNameExpression(expr)) {
                         return expr;
                     }
-                // fall through;
             }
             return undefined;
         }
@@ -36211,7 +29822,7 @@ var ts;
             return resolveEntityName(typeReferenceName, meaning) || unknownSymbol;
         }
         function getTypeReferenceType(node, symbol) {
-            var typeArguments = typeArgumentsFromTypeReferenceNode(node); // Do unconditionally so we mark type arguments as referenced.
+            var typeArguments = typeArgumentsFromTypeReferenceNode(node);
             if (symbol === unknownSymbol) {
                 return errorType;
             }
@@ -36219,40 +29830,32 @@ var ts;
             if (type) {
                 return type;
             }
-            // Get type from reference to named type that cannot be generic (enum or type parameter)
             var res = tryGetDeclaredTypeOfSymbol(symbol);
             if (res) {
                 return checkNoTypeArguments(node, symbol) ?
-                    res.flags & 65536 /* TypeParameter */ ? getConstrainedTypeVariable(res, node) : res :
+                    res.flags & 65536 ? getConstrainedTypeVariable(res, node) : res :
                     errorType;
             }
-            if (!(symbol.flags & 67216319 /* Value */ && isJSDocTypeReference(node))) {
+            if (!(symbol.flags & 67216319 && isJSDocTypeReference(node))) {
                 return errorType;
             }
             var jsdocType = getJSDocTypeReference(node, symbol, typeArguments);
             if (jsdocType) {
                 return jsdocType;
             }
-            // Resolve the type reference as a Type for the purpose of reporting errors.
-            resolveTypeReferenceName(getTypeReferenceName(node), 67901928 /* Type */);
+            resolveTypeReferenceName(getTypeReferenceName(node), 67901928);
             return getTypeOfSymbol(symbol);
         }
-        /**
-         * A jsdoc TypeReference may have resolved to a value (as opposed to a type). If
-         * the symbol is a constructor function, return the inferred class type; otherwise,
-         * the type of this reference is just the type of the value we resolved to.
-         */
         function getJSDocTypeReference(node, symbol, typeArguments) {
             var assignedType = getAssignedClassType(symbol);
             var valueType = getTypeOfSymbol(symbol);
             var referenceType = valueType.symbol && valueType.symbol !== symbol && !isInferredClassType(valueType) && getTypeReferenceTypeWorker(node, valueType.symbol, typeArguments);
             if (referenceType || assignedType) {
-                // TODO: GH#18217 (should the `|| assignedType` be at a lower precedence?)
                 return (referenceType && assignedType ? getIntersectionType([assignedType, referenceType]) : referenceType || assignedType);
             }
         }
         function getTypeReferenceTypeWorker(node, symbol, typeArguments) {
-            if (symbol.flags & (32 /* Class */ | 64 /* Interface */)) {
+            if (symbol.flags & (32 | 64)) {
                 if (symbol.valueDeclaration && ts.isBinaryExpression(symbol.valueDeclaration.parent)) {
                     var jsdocType = getJSDocTypeReference(node, symbol, typeArguments);
                     if (jsdocType) {
@@ -36261,23 +29864,23 @@ var ts;
                 }
                 return getTypeFromClassOrInterfaceReference(node, symbol, typeArguments);
             }
-            if (symbol.flags & 524288 /* TypeAlias */) {
+            if (symbol.flags & 524288) {
                 return getTypeFromTypeAliasReference(node, symbol, typeArguments);
             }
-            if (symbol.flags & 16 /* Function */ &&
+            if (symbol.flags & 16 &&
                 isJSDocTypeReference(node) &&
                 (symbol.members || ts.getJSDocClassTag(symbol.valueDeclaration))) {
                 return getInferredClassType(symbol);
             }
         }
         function getSubstitutionType(typeVariable, substitute) {
-            var result = createType(8388608 /* Substitution */);
+            var result = createType(8388608);
             result.typeVariable = typeVariable;
             result.substitute = substitute;
             return result;
         }
         function isUnaryTupleTypeNode(node) {
-            return node.kind === 168 /* TupleType */ && node.elementTypes.length === 1;
+            return node.kind === 168 && node.elementTypes.length === 1;
         }
         function getImpliedConstraint(typeVariable, checkNode, extendsNode) {
             return isUnaryTupleTypeNode(checkNode) && isUnaryTupleTypeNode(extendsNode) ? getImpliedConstraint(typeVariable, checkNode.elementTypes[0], extendsNode.elementTypes[0]) :
@@ -36286,9 +29889,9 @@ var ts;
         }
         function getConstrainedTypeVariable(typeVariable, node) {
             var constraints;
-            while (node && !ts.isStatement(node) && node.kind !== 286 /* JSDocComment */) {
+            while (node && !ts.isStatement(node) && node.kind !== 286) {
                 var parent = node.parent;
-                if (parent.kind === 171 /* ConditionalType */ && node === parent.trueType) {
+                if (parent.kind === 171 && node === parent.trueType) {
                     var constraint = getImpliedConstraint(typeVariable, parent.checkType, parent.extendsType);
                     if (constraint) {
                         constraints = ts.append(constraints, constraint);
@@ -36299,7 +29902,7 @@ var ts;
             return constraints ? getSubstitutionType(typeVariable, getIntersectionType(ts.append(constraints, typeVariable))) : typeVariable;
         }
         function isJSDocTypeReference(node) {
-            return !!(node.flags & 2097152 /* JSDoc */) && node.kind === 162 /* TypeReference */;
+            return !!(node.flags & 2097152) && node.kind === 162;
         }
         function checkNoTypeArguments(node, symbol) {
             if (node.typeArguments) {
@@ -36345,7 +29948,7 @@ var ts;
                             if (ts.isJSDocIndexSignature(node)) {
                                 var indexed = getTypeFromTypeNode(typeArgs[0]);
                                 var target = getTypeFromTypeNode(typeArgs[1]);
-                                var index = createIndexInfo(target, /*isReadonly*/ false);
+                                var index = createIndexInfo(target, false);
                                 return createAnonymousType(undefined, emptySymbols, ts.emptyArray, ts.emptyArray, indexed === stringType ? index : undefined, indexed === numberType ? index : undefined);
                             }
                             return anyType;
@@ -36357,24 +29960,22 @@ var ts;
         }
         function getTypeFromJSDocNullableTypeNode(node) {
             var type = getTypeFromTypeNode(node.type);
-            return strictNullChecks ? getNullableType(type, 16384 /* Null */) : type;
+            return strictNullChecks ? getNullableType(type, 16384) : type;
         }
         function getTypeFromTypeReference(node) {
             var links = getNodeLinks(node);
             if (!links.resolvedType) {
                 var symbol = void 0;
                 var type = void 0;
-                var meaning = 67901928 /* Type */;
+                var meaning = 67901928;
                 if (isJSDocTypeReference(node)) {
                     type = getIntendedTypeFromJSDocTypeReference(node);
-                    meaning |= 67216319 /* Value */;
+                    meaning |= 67216319;
                 }
                 if (!type) {
                     symbol = resolveTypeReferenceName(getTypeReferenceName(node), meaning);
                     type = getTypeReferenceType(node, symbol);
                 }
-                // Cache both the resolved symbol and the resolved type. The resolved symbol is needed in when we check the
-                // type reference in checkTypeReferenceNode.
                 links.resolvedSymbol = symbol;
                 links.resolvedType = type;
             }
@@ -36386,10 +29987,6 @@ var ts;
         function getTypeFromTypeQueryNode(node) {
             var links = getNodeLinks(node);
             if (!links.resolvedType) {
-                // TypeScript 1.0 spec (April 2014): 3.6.3
-                // The expression is processed as an identifier expression (section 4.3)
-                // or property access expression(section 4.10),
-                // the widened type(section 3.9) of which becomes the result.
                 links.resolvedType = getWidenedType(checkExpression(node.exprName));
             }
             return links.resolvedType;
@@ -36397,12 +29994,12 @@ var ts;
         function getTypeOfGlobalSymbol(symbol, arity) {
             function getTypeDeclaration(symbol) {
                 var declarations = symbol.declarations;
-                for (var _i = 0, declarations_2 = declarations; _i < declarations_2.length; _i++) {
-                    var declaration = declarations_2[_i];
+                for (var _i = 0, declarations_3 = declarations; _i < declarations_3.length; _i++) {
+                    var declaration = declarations_3[_i];
                     switch (declaration.kind) {
-                        case 235 /* ClassDeclaration */:
-                        case 236 /* InterfaceDeclaration */:
-                        case 238 /* EnumDeclaration */:
+                        case 235:
+                        case 236:
+                        case 238:
                             return declaration;
                     }
                 }
@@ -36411,7 +30008,7 @@ var ts;
                 return arity ? emptyGenericType : emptyObjectType;
             }
             var type = getDeclaredTypeOfSymbol(symbol);
-            if (!(type.flags & 131072 /* Object */)) {
+            if (!(type.flags & 131072)) {
                 error(getTypeDeclaration(symbol), ts.Diagnostics.Global_type_0_must_be_a_class_or_interface_type, ts.symbolName(symbol));
                 return arity ? emptyGenericType : emptyObjectType;
             }
@@ -36422,72 +30019,68 @@ var ts;
             return type;
         }
         function getGlobalValueSymbol(name, reportErrors) {
-            return getGlobalSymbol(name, 67216319 /* Value */, reportErrors ? ts.Diagnostics.Cannot_find_global_value_0 : undefined);
+            return getGlobalSymbol(name, 67216319, reportErrors ? ts.Diagnostics.Cannot_find_global_value_0 : undefined);
         }
         function getGlobalTypeSymbol(name, reportErrors) {
-            return getGlobalSymbol(name, 67901928 /* Type */, reportErrors ? ts.Diagnostics.Cannot_find_global_type_0 : undefined);
+            return getGlobalSymbol(name, 67901928, reportErrors ? ts.Diagnostics.Cannot_find_global_type_0 : undefined);
         }
         function getGlobalSymbol(name, meaning, diagnostic) {
-            // Don't track references for global symbols anyway, so value if `isReference` is arbitrary
-            return resolveName(undefined, name, meaning, diagnostic, name, /*isUse*/ false);
+            return resolveName(undefined, name, meaning, diagnostic, name, false);
         }
         function getGlobalType(name, arity, reportErrors) {
             var symbol = getGlobalTypeSymbol(name, reportErrors);
             return symbol || reportErrors ? getTypeOfGlobalSymbol(symbol, arity) : undefined;
         }
         function getGlobalTypedPropertyDescriptorType() {
-            return deferredGlobalTypedPropertyDescriptorType || (deferredGlobalTypedPropertyDescriptorType = getGlobalType("TypedPropertyDescriptor", /*arity*/ 1, /*reportErrors*/ true)) || emptyGenericType;
+            return deferredGlobalTypedPropertyDescriptorType || (deferredGlobalTypedPropertyDescriptorType = getGlobalType("TypedPropertyDescriptor", 1, true)) || emptyGenericType;
         }
         function getGlobalTemplateStringsArrayType() {
-            return deferredGlobalTemplateStringsArrayType || (deferredGlobalTemplateStringsArrayType = getGlobalType("TemplateStringsArray", /*arity*/ 0, /*reportErrors*/ true)) || emptyObjectType;
+            return deferredGlobalTemplateStringsArrayType || (deferredGlobalTemplateStringsArrayType = getGlobalType("TemplateStringsArray", 0, true)) || emptyObjectType;
         }
         function getGlobalImportMetaType() {
-            return deferredGlobalImportMetaType || (deferredGlobalImportMetaType = getGlobalType("ImportMeta", /*arity*/ 0, /*reportErrors*/ true)) || emptyObjectType;
+            return deferredGlobalImportMetaType || (deferredGlobalImportMetaType = getGlobalType("ImportMeta", 0, true)) || emptyObjectType;
         }
         function getGlobalESSymbolConstructorSymbol(reportErrors) {
             return deferredGlobalESSymbolConstructorSymbol || (deferredGlobalESSymbolConstructorSymbol = getGlobalValueSymbol("Symbol", reportErrors));
         }
         function getGlobalESSymbolType(reportErrors) {
-            return deferredGlobalESSymbolType || (deferredGlobalESSymbolType = getGlobalType("Symbol", /*arity*/ 0, reportErrors)) || emptyObjectType;
+            return deferredGlobalESSymbolType || (deferredGlobalESSymbolType = getGlobalType("Symbol", 0, reportErrors)) || emptyObjectType;
         }
         function getGlobalPromiseType(reportErrors) {
-            return deferredGlobalPromiseType || (deferredGlobalPromiseType = getGlobalType("Promise", /*arity*/ 1, reportErrors)) || emptyGenericType;
+            return deferredGlobalPromiseType || (deferredGlobalPromiseType = getGlobalType("Promise", 1, reportErrors)) || emptyGenericType;
         }
         function getGlobalPromiseConstructorSymbol(reportErrors) {
             return deferredGlobalPromiseConstructorSymbol || (deferredGlobalPromiseConstructorSymbol = getGlobalValueSymbol("Promise", reportErrors));
         }
         function getGlobalPromiseConstructorLikeType(reportErrors) {
-            return deferredGlobalPromiseConstructorLikeType || (deferredGlobalPromiseConstructorLikeType = getGlobalType("PromiseConstructorLike", /*arity*/ 0, reportErrors)) || emptyObjectType;
+            return deferredGlobalPromiseConstructorLikeType || (deferredGlobalPromiseConstructorLikeType = getGlobalType("PromiseConstructorLike", 0, reportErrors)) || emptyObjectType;
         }
         function getGlobalAsyncIterableType(reportErrors) {
-            return deferredGlobalAsyncIterableType || (deferredGlobalAsyncIterableType = getGlobalType("AsyncIterable", /*arity*/ 1, reportErrors)) || emptyGenericType;
+            return deferredGlobalAsyncIterableType || (deferredGlobalAsyncIterableType = getGlobalType("AsyncIterable", 1, reportErrors)) || emptyGenericType;
         }
         function getGlobalAsyncIteratorType(reportErrors) {
-            return deferredGlobalAsyncIteratorType || (deferredGlobalAsyncIteratorType = getGlobalType("AsyncIterator", /*arity*/ 1, reportErrors)) || emptyGenericType;
+            return deferredGlobalAsyncIteratorType || (deferredGlobalAsyncIteratorType = getGlobalType("AsyncIterator", 1, reportErrors)) || emptyGenericType;
         }
         function getGlobalAsyncIterableIteratorType(reportErrors) {
-            return deferredGlobalAsyncIterableIteratorType || (deferredGlobalAsyncIterableIteratorType = getGlobalType("AsyncIterableIterator", /*arity*/ 1, reportErrors)) || emptyGenericType;
+            return deferredGlobalAsyncIterableIteratorType || (deferredGlobalAsyncIterableIteratorType = getGlobalType("AsyncIterableIterator", 1, reportErrors)) || emptyGenericType;
         }
         function getGlobalIterableType(reportErrors) {
-            return deferredGlobalIterableType || (deferredGlobalIterableType = getGlobalType("Iterable", /*arity*/ 1, reportErrors)) || emptyGenericType;
+            return deferredGlobalIterableType || (deferredGlobalIterableType = getGlobalType("Iterable", 1, reportErrors)) || emptyGenericType;
         }
         function getGlobalIteratorType(reportErrors) {
-            return deferredGlobalIteratorType || (deferredGlobalIteratorType = getGlobalType("Iterator", /*arity*/ 1, reportErrors)) || emptyGenericType;
+            return deferredGlobalIteratorType || (deferredGlobalIteratorType = getGlobalType("Iterator", 1, reportErrors)) || emptyGenericType;
         }
         function getGlobalIterableIteratorType(reportErrors) {
-            return deferredGlobalIterableIteratorType || (deferredGlobalIterableIteratorType = getGlobalType("IterableIterator", /*arity*/ 1, reportErrors)) || emptyGenericType;
+            return deferredGlobalIterableIteratorType || (deferredGlobalIterableIteratorType = getGlobalType("IterableIterator", 1, reportErrors)) || emptyGenericType;
         }
         function getGlobalTypeOrUndefined(name, arity) {
             if (arity === void 0) { arity = 0; }
-            var symbol = getGlobalSymbol(name, 67901928 /* Type */, /*diagnostic*/ undefined);
+            var symbol = getGlobalSymbol(name, 67901928, undefined);
             return symbol && getTypeOfGlobalSymbol(symbol, arity);
         }
         function getGlobalExtractSymbol() {
-            return deferredGlobalExtractSymbol || (deferredGlobalExtractSymbol = getGlobalSymbol("Extract", 524288 /* TypeAlias */, ts.Diagnostics.Cannot_find_global_type_0)); // TODO: GH#18217
+            return deferredGlobalExtractSymbol || (deferredGlobalExtractSymbol = getGlobalSymbol("Extract", 524288, ts.Diagnostics.Cannot_find_global_type_0));
         }
-        /**
-         * Instantiates a global type that is generic with some element type, and returns that instantiation.
-         */
         function createTypeFromGenericGlobalType(genericGlobalType, typeArguments) {
             return genericGlobalType !== emptyGenericType ? createTypeReference(genericGlobalType, typeArguments) : emptyObjectType;
         }
@@ -36495,16 +30088,16 @@ var ts;
             return createTypeFromGenericGlobalType(getGlobalTypedPropertyDescriptorType(), [propertyType]);
         }
         function createAsyncIterableType(iteratedType) {
-            return createTypeFromGenericGlobalType(getGlobalAsyncIterableType(/*reportErrors*/ true), [iteratedType]);
+            return createTypeFromGenericGlobalType(getGlobalAsyncIterableType(true), [iteratedType]);
         }
         function createAsyncIterableIteratorType(iteratedType) {
-            return createTypeFromGenericGlobalType(getGlobalAsyncIterableIteratorType(/*reportErrors*/ true), [iteratedType]);
+            return createTypeFromGenericGlobalType(getGlobalAsyncIterableIteratorType(true), [iteratedType]);
         }
         function createIterableType(iteratedType) {
-            return createTypeFromGenericGlobalType(getGlobalIterableType(/*reportErrors*/ true), [iteratedType]);
+            return createTypeFromGenericGlobalType(getGlobalIterableType(true), [iteratedType]);
         }
         function createIterableIteratorType(iteratedType) {
-            return createTypeFromGenericGlobalType(getGlobalIterableIteratorType(/*reportErrors*/ true), [iteratedType]);
+            return createTypeFromGenericGlobalType(getGlobalIterableIteratorType(true), [iteratedType]);
         }
         function createArrayType(elementType) {
             return createTypeFromGenericGlobalType(globalArrayType, [elementType]);
@@ -36516,27 +30109,20 @@ var ts;
             }
             return links.resolvedType;
         }
-        // We represent tuple types as type references to synthesized generic interface types created by
-        // this function. The types are of the form:
-        //
-        //   interface Tuple<T0, T1, T2, ...> extends Array<T0 | T1 | T2 | ...> { 0: T0, 1: T1, 2: T2, ... }
-        //
-        // Note that the generic type created by this function has no symbol associated with it. The same
-        // is true for each of the synthesized type parameters.
         function createTupleTypeOfArity(arity) {
             var typeParameters = [];
             var properties = [];
             for (var i = 0; i < arity; i++) {
-                var typeParameter = createType(65536 /* TypeParameter */);
+                var typeParameter = createType(65536);
                 typeParameters.push(typeParameter);
-                var property = createSymbol(4 /* Property */, "" + i);
+                var property = createSymbol(4, "" + i);
                 property.type = typeParameter;
                 properties.push(property);
             }
-            var lengthSymbol = createSymbol(4 /* Property */, "length");
+            var lengthSymbol = createSymbol(4, "length");
             lengthSymbol.type = getLiteralType(arity);
             properties.push(lengthSymbol);
-            var type = createObjectType(8 /* Tuple */ | 4 /* Reference */);
+            var type = createObjectType(8 | 4);
             type.typeParameters = typeParameters;
             type.outerTypeParameters = undefined;
             type.localTypeParameters = typeParameters;
@@ -36544,7 +30130,7 @@ var ts;
             type.instantiations.set(getTypeListId(type.typeParameters), type);
             type.target = type;
             type.typeArguments = type.typeParameters;
-            type.thisType = createType(65536 /* TypeParameter */);
+            type.thisType = createType(65536);
             type.thisType.isThisType = true;
             type.thisType.constraint = type;
             type.declaredProperties = properties;
@@ -36573,28 +30159,20 @@ var ts;
         function containsType(types, type) {
             return ts.binarySearch(types, type, getTypeId, ts.compareValues) >= 0;
         }
-        // Return true if the given intersection type contains
-        // more than one unit type or,
-        // an object type and a nullable type (null or undefined), or
-        // a string-like type and a type known to be non-string-like, or
-        // a number-like type and a type known to be non-number-like, or
-        // a symbol-like type and a type known to be non-symbol-like, or
-        // a void-like type and a type known to be non-void-like, or
-        // a non-primitive type and a type known to be primitive.
         function isEmptyIntersectionType(type) {
             var combined = 0;
             for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
                 var t = _a[_i];
-                if (t.flags & 27072 /* Unit */ && combined & 27072 /* Unit */) {
+                if (t.flags & 27072 && combined & 27072) {
                     return true;
                 }
                 combined |= t.flags;
-                if (combined & 24576 /* Nullable */ && combined & (131072 /* Object */ | 16777216 /* NonPrimitive */) ||
-                    combined & 16777216 /* NonPrimitive */ && combined & (16809468 /* DisjointDomains */ & ~16777216 /* NonPrimitive */) ||
-                    combined & 68 /* StringLike */ && combined & (16809468 /* DisjointDomains */ & ~68 /* StringLike */) ||
-                    combined & 168 /* NumberLike */ && combined & (16809468 /* DisjointDomains */ & ~168 /* NumberLike */) ||
-                    combined & 3072 /* ESSymbolLike */ && combined & (16809468 /* DisjointDomains */ & ~3072 /* ESSymbolLike */) ||
-                    combined & 12288 /* VoidLike */ && combined & (16809468 /* DisjointDomains */ & ~12288 /* VoidLike */)) {
+                if (combined & 24576 && combined & (131072 | 16777216) ||
+                    combined & 16777216 && combined & (16809468 & ~16777216) ||
+                    combined & 68 && combined & (16809468 & ~68) ||
+                    combined & 168 && combined & (16809468 & ~168) ||
+                    combined & 3072 && combined & (16809468 & ~3072) ||
+                    combined & 12288 && combined & (16809468 & ~12288)) {
                     return true;
                 }
             }
@@ -36602,29 +30180,25 @@ var ts;
         }
         function addTypeToUnion(typeSet, includes, type) {
             var flags = type.flags;
-            if (flags & 262144 /* Union */) {
+            if (flags & 262144) {
                 return addTypesToUnion(typeSet, includes, type.types);
             }
-            // We ignore 'never' types in unions. Likewise, we ignore intersections of unit types as they are
-            // another form of 'never' (in that they have an empty value domain). We could in theory turn
-            // intersections of unit types into 'never' upon construction, but deferring the reduction makes it
-            // easier to reason about their origin.
-            if (!(flags & 32768 /* Never */ || flags & 524288 /* Intersection */ && isEmptyIntersectionType(type))) {
-                includes |= flags & ~939524096 /* ConstructionFlags */;
-                if (flags & 3 /* AnyOrUnknown */) {
+            if (!(flags & 32768 || flags & 524288 && isEmptyIntersectionType(type))) {
+                includes |= flags & ~939524096;
+                if (flags & 3) {
                     if (type === wildcardType)
-                        includes |= 268435456 /* Wildcard */;
+                        includes |= 268435456;
                 }
-                else if (!strictNullChecks && flags & 24576 /* Nullable */) {
-                    if (!(flags & 134217728 /* ContainsWideningType */))
-                        includes |= 134217728 /* NonWideningType */;
+                else if (!strictNullChecks && flags & 24576) {
+                    if (!(flags & 134217728))
+                        includes |= 134217728;
                 }
                 else {
                     var len = typeSet.length;
                     var index = len && type.id > typeSet[len - 1].id ? ~len : ts.binarySearch(typeSet, type, getTypeId, ts.compareValues);
                     if (index < 0) {
-                        if (!(flags & 131072 /* Object */ && type.objectFlags & 16 /* Anonymous */ &&
-                            type.symbol && type.symbol.flags & (16 /* Function */ | 8192 /* Method */) && containsIdenticalType(typeSet, type))) {
+                        if (!(flags & 131072 && type.objectFlags & 16 &&
+                            type.symbol && type.symbol.flags & (16 | 8192) && containsIdenticalType(typeSet, type))) {
                             typeSet.splice(~index, 0, type);
                         }
                     }
@@ -36632,8 +30206,6 @@ var ts;
             }
             return includes;
         }
-        // Add the given types to the given type set. Order is preserved, duplicates are removed,
-        // and nested types of the given kind are flattened into the set.
         function addTypesToUnion(typeSet, includes, types) {
             for (var _i = 0, types_6 = types; _i < types_6.length; _i++) {
                 var type = types_6[_i];
@@ -36653,8 +30225,8 @@ var ts;
         function isSubtypeOfAny(source, targets) {
             for (var _i = 0, targets_1 = targets; _i < targets_1.length; _i++) {
                 var target = targets_1[_i];
-                if (source !== target && isTypeSubtypeOf(source, target) && (!(ts.getObjectFlags(getTargetType(source)) & 1 /* Class */) ||
-                    !(ts.getObjectFlags(getTargetType(target)) & 1 /* Class */) ||
+                if (source !== target && isTypeSubtypeOf(source, target) && (!(ts.getObjectFlags(getTargetType(source)) & 1) ||
+                    !(ts.getObjectFlags(getTargetType(target)) & 1) ||
                     isTypeDerivedFrom(source, target))) {
                     return true;
                 }
@@ -36663,11 +30235,11 @@ var ts;
         }
         function isSetOfLiteralsFromSameEnum(types) {
             var first = types[0];
-            if (first.flags & 512 /* EnumLiteral */) {
+            if (first.flags & 512) {
                 var firstEnum = getParentOfSymbol(first.symbol);
                 for (var i = 1; i < types.length; i++) {
                     var other = types[i];
-                    if (!(other.flags & 512 /* EnumLiteral */) || (firstEnum !== getParentOfSymbol(other.symbol))) {
+                    if (!(other.flags & 512) || (firstEnum !== getParentOfSymbol(other.symbol))) {
                         return false;
                     }
                 }
@@ -36692,24 +30264,17 @@ var ts;
             while (i > 0) {
                 i--;
                 var t = types[i];
-                var remove = t.flags & 64 /* StringLiteral */ && includes & 4 /* String */ ||
-                    t.flags & 128 /* NumberLiteral */ && includes & 8 /* Number */ ||
-                    t.flags & 2048 /* UniqueESSymbol */ && includes & 1024 /* ESSymbol */ ||
-                    t.flags & 192 /* StringOrNumberLiteral */ && t.flags & 33554432 /* FreshLiteral */ && containsType(types, t.regularType);
+                var remove = t.flags & 64 && includes & 4 ||
+                    t.flags & 128 && includes & 8 ||
+                    t.flags & 2048 && includes & 1024 ||
+                    t.flags & 192 && t.flags & 33554432 && containsType(types, t.regularType);
                 if (remove) {
                     ts.orderedRemoveItemAt(types, i);
                 }
             }
         }
-        // We sort and deduplicate the constituent types based on object identity. If the subtypeReduction
-        // flag is specified we also reduce the constituent type set to only include types that aren't subtypes
-        // of other types. Subtype reduction is expensive for large union types and is possible only when union
-        // types are known not to circularly reference themselves (as is the case with union types created by
-        // expression constructs such as array literals and the || and ?: operators). Named types can
-        // circularly reference themselves and therefore cannot be subtype reduced during their declaration.
-        // For example, "type Item = string | (() => Item" is a named type that circularly references itself.
         function getUnionType(types, unionReduction, aliasSymbol, aliasTypeArguments) {
-            if (unionReduction === void 0) { unionReduction = 1 /* Literal */; }
+            if (unionReduction === void 0) { unionReduction = 1; }
             if (types.length === 0) {
                 return neverType;
             }
@@ -36718,25 +30283,25 @@ var ts;
             }
             var typeSet = [];
             var includes = addTypesToUnion(typeSet, 0, types);
-            if (includes & 3 /* AnyOrUnknown */) {
-                return includes & 1 /* Any */ ? includes & 268435456 /* Wildcard */ ? wildcardType : anyType : unknownType;
+            if (includes & 3) {
+                return includes & 1 ? includes & 268435456 ? wildcardType : anyType : unknownType;
             }
             switch (unionReduction) {
-                case 1 /* Literal */:
-                    if (includes & 2240 /* StringOrNumberLiteralOrUnique */) {
+                case 1:
+                    if (includes & 2240) {
                         removeRedundantLiteralTypes(typeSet, includes);
                     }
                     break;
-                case 2 /* Subtype */:
+                case 2:
                     removeSubtypes(typeSet);
                     break;
             }
             if (typeSet.length === 0) {
-                return includes & 16384 /* Null */ ? includes & 134217728 /* NonWideningType */ ? nullType : nullWideningType :
-                    includes & 8192 /* Undefined */ ? includes & 134217728 /* NonWideningType */ ? undefinedType : undefinedWideningType :
+                return includes & 16384 ? includes & 134217728 ? nullType : nullWideningType :
+                    includes & 8192 ? includes & 134217728 ? undefinedType : undefinedWideningType :
                         neverType;
             }
-            return getUnionTypeFromSortedList(typeSet, includes & 16749629 /* NotUnit */ ? 0 : 67108864 /* UnionOfUnitTypes */, aliasSymbol, aliasTypeArguments);
+            return getUnionTypeFromSortedList(typeSet, includes & 16749629 ? 0 : 67108864, aliasSymbol, aliasTypeArguments);
         }
         function getUnionTypePredicate(signatures) {
             var first;
@@ -36749,7 +30314,6 @@ var ts;
                 }
                 if (first) {
                     if (!typePredicateKindsMatch(first, pred)) {
-                        // No common type predicate.
                         return undefined;
                     }
                 }
@@ -36759,7 +30323,6 @@ var ts;
                 types.push(pred.type);
             }
             if (!first) {
-                // No union signatures had a type predicate.
                 return undefined;
             }
             var unionType = getUnionType(types);
@@ -36772,7 +30335,6 @@ var ts;
                 ? ts.isIdentifierTypePredicate(b) && a.parameterIndex === b.parameterIndex
                 : !ts.isIdentifierTypePredicate(b);
         }
-        // This function assumes the constituent type list is sorted and deduplicated.
         function getUnionTypeFromSortedList(types, unionOfUnitTypes, aliasSymbol, aliasTypeArguments) {
             if (types.length === 0) {
                 return neverType;
@@ -36783,16 +30345,10 @@ var ts;
             var id = getTypeListId(types);
             var type = unionTypes.get(id);
             if (!type) {
-                var propagatedFlags = getPropagatingFlagsOfTypes(types, /*excludeKinds*/ 24576 /* Nullable */);
-                type = createType(262144 /* Union */ | propagatedFlags | unionOfUnitTypes);
+                var propagatedFlags = getPropagatingFlagsOfTypes(types, 24576);
+                type = createType(262144 | propagatedFlags | unionOfUnitTypes);
                 unionTypes.set(id, type);
                 type.types = types;
-                /*
-                Note: This is the alias symbol (or lack thereof) that we see when we first encounter this union type.
-                For aliases of identical unions, eg `type T = A | B; type U = A | B`, the symbol of the first alias encountered is the aliasSymbol.
-                (In the language service, the order may depend on the order in which a user takes actions, such as hovering over symbols.)
-                It's important that we create equivalent union types only once, so that's an unfortunate side effect.
-                */
                 type.aliasSymbol = aliasSymbol;
                 type.aliasTypeArguments = aliasTypeArguments;
             }
@@ -36802,35 +30358,33 @@ var ts;
             var links = getNodeLinks(node);
             if (!links.resolvedType) {
                 var aliasSymbol = getAliasSymbolForTypeNode(node);
-                links.resolvedType = getUnionType(ts.map(node.types, getTypeFromTypeNode), 1 /* Literal */, aliasSymbol, getTypeArgumentsForAliasSymbol(aliasSymbol));
+                links.resolvedType = getUnionType(ts.map(node.types, getTypeFromTypeNode), 1, aliasSymbol, getTypeArgumentsForAliasSymbol(aliasSymbol));
             }
             return links.resolvedType;
         }
         function addTypeToIntersection(typeSet, includes, type) {
             var flags = type.flags;
-            if (flags & 524288 /* Intersection */) {
+            if (flags & 524288) {
                 return addTypesToIntersection(typeSet, includes, type.types);
             }
-            if (ts.getObjectFlags(type) & 16 /* Anonymous */ && isEmptyObjectType(type)) {
-                includes |= 536870912 /* EmptyObject */;
+            if (ts.getObjectFlags(type) & 16 && isEmptyObjectType(type)) {
+                includes |= 536870912;
             }
             else {
-                includes |= flags & ~939524096 /* ConstructionFlags */;
-                if (flags & 3 /* AnyOrUnknown */) {
+                includes |= flags & ~939524096;
+                if (flags & 3) {
                     if (type === wildcardType)
-                        includes |= 268435456 /* Wildcard */;
+                        includes |= 268435456;
                 }
-                else if ((strictNullChecks || !(flags & 24576 /* Nullable */)) && !ts.contains(typeSet, type) &&
-                    !(flags & 131072 /* Object */ && type.objectFlags & 16 /* Anonymous */ &&
-                        type.symbol && type.symbol.flags & (16 /* Function */ | 8192 /* Method */) &&
+                else if ((strictNullChecks || !(flags & 24576)) && !ts.contains(typeSet, type) &&
+                    !(flags & 131072 && type.objectFlags & 16 &&
+                        type.symbol && type.symbol.flags & (16 | 8192) &&
                         containsIdenticalType(typeSet, type))) {
                     typeSet.push(type);
                 }
             }
             return includes;
         }
-        // Add the given types to the given type set. Order is preserved, freshness is removed from literal
-        // types, duplicates are removed, and nested types of the given kind are flattened into the set.
         function addTypesToIntersection(typeSet, includes, types) {
             for (var _i = 0, types_8 = types; _i < types_8.length; _i++) {
                 var type = types_8[_i];
@@ -36843,67 +30397,54 @@ var ts;
             while (i > 0) {
                 i--;
                 var t = types[i];
-                var remove = t.flags & 4 /* String */ && includes & 64 /* StringLiteral */ ||
-                    t.flags & 8 /* Number */ && includes & 128 /* NumberLiteral */ ||
-                    t.flags & 1024 /* ESSymbol */ && includes & 2048 /* UniqueESSymbol */;
+                var remove = t.flags & 4 && includes & 64 ||
+                    t.flags & 8 && includes & 128 ||
+                    t.flags & 1024 && includes & 2048;
                 if (remove) {
                     ts.orderedRemoveItemAt(types, i);
                 }
             }
         }
-        // When intersecting unions of unit types we can simply intersect based on type identity.
-        // Here we remove all unions of unit types from the given list and replace them with a
-        // a single union containing an intersection of the unit types.
         function intersectUnionsOfUnitTypes(types) {
-            var unionIndex = ts.findIndex(types, function (t) { return (t.flags & 67108864 /* UnionOfUnitTypes */) !== 0; });
+            var unionIndex = ts.findIndex(types, function (t) { return (t.flags & 67108864) !== 0; });
             var unionType = types[unionIndex];
             var intersection = unionType.types;
             var i = types.length - 1;
-            var _loop_3 = function () {
+            var _loop_6 = function () {
                 var t = types[i];
-                if (t.flags & 67108864 /* UnionOfUnitTypes */) {
+                if (t.flags & 67108864) {
                     intersection = ts.filter(intersection, function (u) { return containsType(t.types, u); });
                     ts.orderedRemoveItemAt(types, i);
                 }
                 i--;
             };
             while (i > unionIndex) {
-                _loop_3();
+                _loop_6();
             }
             if (intersection === unionType.types) {
                 return false;
             }
-            types[unionIndex] = getUnionTypeFromSortedList(intersection, unionType.flags & 67108864 /* UnionOfUnitTypes */);
+            types[unionIndex] = getUnionTypeFromSortedList(intersection, unionType.flags & 67108864);
             return true;
         }
-        // We normalize combinations of intersection and union types based on the distributive property of the '&'
-        // operator. Specifically, because X & (A | B) is equivalent to X & A | X & B, we can transform intersection
-        // types with union type constituents into equivalent union types with intersection type constituents and
-        // effectively ensure that union types are always at the top level in type representations.
-        //
-        // We do not perform structural deduplication on intersection types. Intersection types are created only by the &
-        // type operator and we can't reduce those because we want to support recursive intersection types. For example,
-        // a type alias of the form "type List<T> = T & { next: List<T> }" cannot be reduced during its declaration.
-        // Also, unlike union types, the order of the constituent types is preserved in order that overload resolution
-        // for intersections of types with signatures can be deterministic.
         function getIntersectionType(types, aliasSymbol, aliasTypeArguments) {
             var typeSet = [];
             var includes = addTypesToIntersection(typeSet, 0, types);
-            if (includes & 32768 /* Never */) {
+            if (includes & 32768) {
                 return neverType;
             }
-            if (includes & 1 /* Any */) {
-                return includes & 268435456 /* Wildcard */ ? wildcardType : anyType;
+            if (includes & 1) {
+                return includes & 268435456 ? wildcardType : anyType;
             }
-            if (!strictNullChecks && includes & 24576 /* Nullable */) {
-                return includes & 8192 /* Undefined */ ? undefinedType : nullType;
+            if (!strictNullChecks && includes & 24576) {
+                return includes & 8192 ? undefinedType : nullType;
             }
-            if (includes & 4 /* String */ && includes & 64 /* StringLiteral */ ||
-                includes & 8 /* Number */ && includes & 128 /* NumberLiteral */ ||
-                includes & 1024 /* ESSymbol */ && includes & 2048 /* UniqueESSymbol */) {
+            if (includes & 4 && includes & 64 ||
+                includes & 8 && includes & 128 ||
+                includes & 1024 && includes & 2048) {
                 removeRedundantPrimitiveTypes(typeSet, includes);
             }
-            if (includes & 536870912 /* EmptyObject */ && !(includes & 131072 /* Object */)) {
+            if (includes & 536870912 && !(includes & 131072)) {
                 typeSet.push(emptyObjectType);
             }
             if (typeSet.length === 0) {
@@ -36912,27 +30453,22 @@ var ts;
             if (typeSet.length === 1) {
                 return typeSet[0];
             }
-            if (includes & 262144 /* Union */) {
-                if (includes & 67108864 /* UnionOfUnitTypes */ && intersectUnionsOfUnitTypes(typeSet)) {
-                    // When the intersection creates a reduced set (which might mean that *all* union types have
-                    // disappeared), we restart the operation to get a new set of combined flags. Once we have
-                    // reduced we'll never reduce again, so this occurs at most once.
+            if (includes & 262144) {
+                if (includes & 67108864 && intersectUnionsOfUnitTypes(typeSet)) {
                     return getIntersectionType(typeSet, aliasSymbol, aliasTypeArguments);
                 }
-                // We are attempting to construct a type of the form X & (A | B) & Y. Transform this into a type of
-                // the form X & A & Y | X & B & Y and recursively reduce until no union type constituents remain.
-                var unionIndex_1 = ts.findIndex(typeSet, function (t) { return (t.flags & 262144 /* Union */) !== 0; });
+                var unionIndex_1 = ts.findIndex(typeSet, function (t) { return (t.flags & 262144) !== 0; });
                 var unionType = typeSet[unionIndex_1];
-                return getUnionType(ts.map(unionType.types, function (t) { return getIntersectionType(ts.replaceElement(typeSet, unionIndex_1, t)); }), 1 /* Literal */, aliasSymbol, aliasTypeArguments);
+                return getUnionType(ts.map(unionType.types, function (t) { return getIntersectionType(ts.replaceElement(typeSet, unionIndex_1, t)); }), 1, aliasSymbol, aliasTypeArguments);
             }
             var id = getTypeListId(typeSet);
             var type = intersectionTypes.get(id);
             if (!type) {
-                var propagatedFlags = getPropagatingFlagsOfTypes(typeSet, /*excludeKinds*/ 24576 /* Nullable */);
-                type = createType(524288 /* Intersection */ | propagatedFlags);
+                var propagatedFlags = getPropagatingFlagsOfTypes(typeSet, 24576);
+                type = createType(524288 | propagatedFlags);
                 intersectionTypes.set(id, type);
                 type.types = typeSet;
-                type.aliasSymbol = aliasSymbol; // See comment in `getUnionTypeFromSortedList`.
+                type.aliasSymbol = aliasSymbol;
                 type.aliasTypeArguments = aliasTypeArguments;
             }
             return type;
@@ -36946,23 +30482,23 @@ var ts;
             return links.resolvedType;
         }
         function createIndexType(type, stringsOnly) {
-            var result = createType(1048576 /* Index */);
+            var result = createType(1048576);
             result.type = type;
             result.stringsOnly = stringsOnly;
             return result;
         }
         function getIndexTypeForGenericType(type, stringsOnly) {
             return stringsOnly ?
-                type.resolvedStringIndexType || (type.resolvedStringIndexType = createIndexType(type, /*stringsOnly*/ true)) :
-                type.resolvedIndexType || (type.resolvedIndexType = createIndexType(type, /*stringsOnly*/ false));
+                type.resolvedStringIndexType || (type.resolvedStringIndexType = createIndexType(type, true)) :
+                type.resolvedIndexType || (type.resolvedIndexType = createIndexType(type, false));
         }
         function getLiteralTypeFromPropertyName(prop, include) {
-            if (!(ts.getDeclarationModifierFlagsFromSymbol(prop) & 24 /* NonPublicAccessibilityModifier */)) {
+            if (!(ts.getDeclarationModifierFlagsFromSymbol(prop) & 24)) {
                 var type = getLateBoundSymbol(prop).nameType;
                 if (!type && !ts.isKnownSymbol(prop)) {
                     var name = ts.getNameOfDeclaration(prop.valueDeclaration);
                     type = name && ts.isNumericLiteral(name) ? getLiteralType(+name.text) :
-                        name && name.kind === 147 /* ComputedPropertyName */ && ts.isNumericLiteral(name.expression) ? getLiteralType(+name.expression.text) :
+                        name && name.kind === 147 && ts.isNumericLiteral(name.expression) ? getLiteralType(+name.expression.text) :
                             getLiteralType(ts.symbolName(prop));
                 }
                 if (type && type.flags & include) {
@@ -36975,21 +30511,21 @@ var ts;
             return getUnionType(ts.map(getPropertiesOfType(type), function (t) { return getLiteralTypeFromPropertyName(t, include); }));
         }
         function getNonEnumNumberIndexInfo(type) {
-            var numberIndexInfo = getIndexInfoOfType(type, 1 /* Number */);
+            var numberIndexInfo = getIndexInfoOfType(type, 1);
             return numberIndexInfo !== enumNumberIndexInfo ? numberIndexInfo : undefined;
         }
         function getIndexType(type, stringsOnly) {
             if (stringsOnly === void 0) { stringsOnly = keyofStringsOnly; }
-            return type.flags & 262144 /* Union */ ? getIntersectionType(ts.map(type.types, function (t) { return getIndexType(t, stringsOnly); })) :
-                type.flags & 524288 /* Intersection */ ? getUnionType(ts.map(type.types, function (t) { return getIndexType(t, stringsOnly); })) :
-                    maybeTypeOfKind(type, 14745600 /* InstantiableNonPrimitive */) ? getIndexTypeForGenericType(type, stringsOnly) :
-                        ts.getObjectFlags(type) & 32 /* Mapped */ ? getConstraintTypeFromMappedType(type) :
+            return type.flags & 262144 ? getIntersectionType(ts.map(type.types, function (t) { return getIndexType(t, stringsOnly); })) :
+                type.flags & 524288 ? getUnionType(ts.map(type.types, function (t) { return getIndexType(t, stringsOnly); })) :
+                    maybeTypeOfKind(type, 14745600) ? getIndexTypeForGenericType(type, stringsOnly) :
+                        ts.getObjectFlags(type) & 32 ? getConstraintTypeFromMappedType(type) :
                             type === wildcardType ? wildcardType :
-                                type.flags & 1 /* Any */ ? keyofConstraintType :
-                                    stringsOnly ? getIndexInfoOfType(type, 0 /* String */) ? stringType : getLiteralTypeFromPropertyNames(type, 64 /* StringLiteral */) :
-                                        getIndexInfoOfType(type, 0 /* String */) ? getUnionType([stringType, numberType, getLiteralTypeFromPropertyNames(type, 2048 /* UniqueESSymbol */)]) :
-                                            getNonEnumNumberIndexInfo(type) ? getUnionType([numberType, getLiteralTypeFromPropertyNames(type, 64 /* StringLiteral */ | 2048 /* UniqueESSymbol */)]) :
-                                                getLiteralTypeFromPropertyNames(type, 2240 /* StringOrNumberLiteralOrUnique */);
+                                type.flags & 1 ? keyofConstraintType :
+                                    stringsOnly ? getIndexInfoOfType(type, 0) ? stringType : getLiteralTypeFromPropertyNames(type, 64) :
+                                        getIndexInfoOfType(type, 0) ? getUnionType([stringType, numberType, getLiteralTypeFromPropertyNames(type, 2048)]) :
+                                            getNonEnumNumberIndexInfo(type) ? getUnionType([numberType, getLiteralTypeFromPropertyNames(type, 64 | 2048)]) :
+                                                getLiteralTypeFromPropertyNames(type, 2240);
         }
         function getExtractStringType(type) {
             if (keyofStringsOnly) {
@@ -37000,41 +30536,41 @@ var ts;
         }
         function getIndexTypeOrString(type) {
             var indexType = getExtractStringType(getIndexType(type));
-            return indexType.flags & 32768 /* Never */ ? stringType : indexType;
+            return indexType.flags & 32768 ? stringType : indexType;
         }
         function getTypeFromTypeOperatorNode(node) {
             var links = getNodeLinks(node);
             if (!links.resolvedType) {
                 switch (node.operator) {
-                    case 128 /* KeyOfKeyword */:
+                    case 128:
                         links.resolvedType = getIndexType(getTypeFromTypeNode(node.type));
                         break;
-                    case 141 /* UniqueKeyword */:
-                        links.resolvedType = node.type.kind === 138 /* SymbolKeyword */
+                    case 141:
+                        links.resolvedType = node.type.kind === 138
                             ? getESSymbolLikeTypeForNode(ts.walkUpParenthesizedTypes(node.parent))
                             : errorType;
                         break;
                 }
             }
-            return links.resolvedType; // TODO: GH#18217
+            return links.resolvedType;
         }
         function createIndexedAccessType(objectType, indexType) {
-            var type = createType(2097152 /* IndexedAccess */);
+            var type = createType(2097152);
             type.objectType = objectType;
             type.indexType = indexType;
             return type;
         }
         function getPropertyTypeForIndexType(objectType, indexType, accessNode, cacheSymbol) {
-            var accessExpression = accessNode && accessNode.kind === 186 /* ElementAccessExpression */ ? accessNode : undefined;
+            var accessExpression = accessNode && accessNode.kind === 186 ? accessNode : undefined;
             var propName = isTypeUsableAsLateBoundName(indexType) ? getLateBoundNameFromType(indexType) :
-                accessExpression && checkThatExpressionIsProperSymbolReference(accessExpression.argumentExpression, indexType, /*reportError*/ false) ?
+                accessExpression && checkThatExpressionIsProperSymbolReference(accessExpression.argumentExpression, indexType, false) ?
                     ts.getPropertyNameForKnownSymbolName(ts.idText(accessExpression.argumentExpression.name)) :
                     undefined;
             if (propName !== undefined) {
                 var prop = getPropertyOfType(objectType, propName);
                 if (prop) {
                     if (accessExpression) {
-                        markPropertyAsReferenced(prop, accessExpression, /*isThisAccess*/ accessExpression.expression.kind === 99 /* ThisKeyword */);
+                        markPropertyAsReferenced(prop, accessExpression, accessExpression.expression.kind === 99);
                         if (ts.isAssignmentTarget(accessExpression) && (isReferenceToReadonlyEntity(accessExpression, prop) || isReferenceThroughNamespaceImport(accessExpression))) {
                             error(accessExpression.argumentExpression, ts.Diagnostics.Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property, symbolToString(prop));
                             return errorType;
@@ -37046,16 +30582,16 @@ var ts;
                     return getTypeOfSymbol(prop);
                 }
             }
-            if (!(indexType.flags & 24576 /* Nullable */) && isTypeAssignableToKind(indexType, 68 /* StringLike */ | 168 /* NumberLike */ | 3072 /* ESSymbolLike */)) {
+            if (!(indexType.flags & 24576) && isTypeAssignableToKind(indexType, 68 | 168 | 3072)) {
                 if (isTypeAny(objectType)) {
                     return objectType;
                 }
-                var indexInfo = isTypeAssignableToKind(indexType, 168 /* NumberLike */) && getIndexInfoOfType(objectType, 1 /* Number */) ||
-                    getIndexInfoOfType(objectType, 0 /* String */) ||
+                var indexInfo = isTypeAssignableToKind(indexType, 168) && getIndexInfoOfType(objectType, 1) ||
+                    getIndexInfoOfType(objectType, 0) ||
                     undefined;
                 if (indexInfo) {
-                    if (accessNode && !isTypeAssignableToKind(indexType, 4 /* String */ | 8 /* Number */)) {
-                        var indexNode = accessNode.kind === 186 /* ElementAccessExpression */ ? accessNode.argumentExpression : accessNode.indexType;
+                    if (accessNode && !isTypeAssignableToKind(indexType, 4 | 8)) {
+                        var indexNode = accessNode.kind === 186 ? accessNode.argumentExpression : accessNode.indexType;
                         error(indexNode, ts.Diagnostics.Type_0_cannot_be_used_as_an_index_type, typeToString(indexType));
                     }
                     else if (accessExpression && indexInfo.isReadonly && (ts.isAssignmentTarget(accessExpression) || ts.isDeleteTarget(accessExpression))) {
@@ -37063,12 +30599,12 @@ var ts;
                     }
                     return indexInfo.type;
                 }
-                if (indexType.flags & 32768 /* Never */) {
+                if (indexType.flags & 32768) {
                     return neverType;
                 }
                 if (accessExpression && !isConstEnumObjectType(objectType)) {
                     if (noImplicitAny && !compilerOptions.suppressImplicitAnyIndexErrors) {
-                        if (getIndexTypeOfType(objectType, 1 /* Number */)) {
+                        if (getIndexTypeOfType(objectType, 1)) {
                             error(accessExpression.argumentExpression, ts.Diagnostics.Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number);
                         }
                         else {
@@ -37079,11 +30615,11 @@ var ts;
                 }
             }
             if (accessNode) {
-                var indexNode = accessNode.kind === 186 /* ElementAccessExpression */ ? accessNode.argumentExpression : accessNode.indexType;
-                if (indexType.flags & (64 /* StringLiteral */ | 128 /* NumberLiteral */)) {
+                var indexNode = accessNode.kind === 186 ? accessNode.argumentExpression : accessNode.indexType;
+                if (indexType.flags & (64 | 128)) {
                     error(indexNode, ts.Diagnostics.Property_0_does_not_exist_on_type_1, "" + indexType.value, typeToString(objectType));
                 }
-                else if (indexType.flags & (4 /* String */ | 8 /* Number */)) {
+                else if (indexType.flags & (4 | 8)) {
                     error(indexNode, ts.Diagnostics.Type_0_has_no_matching_index_signature_for_type_1, typeToString(objectType), typeToString(indexType));
                 }
                 else {
@@ -37093,15 +30629,13 @@ var ts;
             return errorType;
         }
         function isGenericObjectType(type) {
-            return maybeTypeOfKind(type, 14745600 /* InstantiableNonPrimitive */ | 134217728 /* GenericMappedType */);
+            return maybeTypeOfKind(type, 14745600 | 134217728);
         }
         function isGenericIndexType(type) {
-            return maybeTypeOfKind(type, 14745600 /* InstantiableNonPrimitive */ | 1048576 /* Index */);
+            return maybeTypeOfKind(type, 14745600 | 1048576);
         }
-        // Return true if the given type is a non-generic object type with a string index signature and no
-        // other members.
         function isStringIndexOnlyType(type) {
-            if (type.flags & 131072 /* Object */ && !isGenericMappedType(type)) {
+            if (type.flags & 131072 && !isGenericMappedType(type)) {
                 var t = resolveStructuredTypeMembers(type);
                 return t.properties.length === 0 &&
                     t.callSignatures.length === 0 && t.constructSignatures.length === 0 &&
@@ -37110,33 +30644,25 @@ var ts;
             return false;
         }
         function isMappedTypeToNever(type) {
-            return !!(ts.getObjectFlags(type) & 32 /* Mapped */) && getTemplateTypeFromMappedType(type) === neverType;
+            return !!(ts.getObjectFlags(type) & 32) && getTemplateTypeFromMappedType(type) === neverType;
         }
         function getSimplifiedType(type) {
-            return type.flags & 2097152 /* IndexedAccess */ ? getSimplifiedIndexedAccessType(type) : type;
+            return type.flags & 2097152 ? getSimplifiedIndexedAccessType(type) : type;
         }
-        // Transform an indexed access to a simpler form, if possible. Return the simpler form, or return
-        // the type itself if no transformation is possible.
         function getSimplifiedIndexedAccessType(type) {
             if (type.simplified) {
                 return type.simplified === circularConstraintType ? type : type.simplified;
             }
             type.simplified = circularConstraintType;
-            // We recursively simplify the object type as it may in turn be an indexed access type. For example, with
-            // '{ [P in T]: { [Q in U]: number } }[T][U]' we want to first simplify the inner indexed access type.
             var objectType = getSimplifiedType(type.objectType);
-            if (objectType.flags & 524288 /* Intersection */ && isGenericObjectType(objectType)) {
-                // Given an indexed access type T[K], if T is an intersection containing one or more generic types and one or
-                // more object types with only a string index signature, e.g. '(U & V & { [x: string]: D })[K]', return a
-                // transformed type of the form '(U & V)[K] | D'. This allows us to properly reason about higher order indexed
-                // access types with default property values as expressed by D.
+            if (objectType.flags & 524288 && isGenericObjectType(objectType)) {
                 if (ts.some(objectType.types, isStringIndexOnlyType)) {
                     var regularTypes = [];
                     var stringIndexTypes = [];
                     for (var _i = 0, _a = objectType.types; _i < _a.length; _i++) {
                         var t = _a[_i];
                         if (isStringIndexOnlyType(t)) {
-                            stringIndexTypes.push(getIndexTypeOfType(t, 0 /* String */));
+                            stringIndexTypes.push(getIndexTypeOfType(t, 0));
                         }
                         else {
                             regularTypes.push(t);
@@ -37147,23 +30673,15 @@ var ts;
                         getIntersectionType(stringIndexTypes)
                     ]);
                 }
-                // Given an indexed access type T[K], if T is an intersection containing one or more generic types and one or
-                // more mapped types with a template type `never`, '(U & V & { [P in T]: never })[K]', return a
-                // transformed type that removes the never-mapped type: '(U & V)[K]'. This mirrors what would happen
-                // eventually anyway, but it easier to reason about.
                 if (ts.some(objectType.types, isMappedTypeToNever)) {
                     var nonNeverTypes = ts.filter(objectType.types, function (t) { return !isMappedTypeToNever(t); });
                     return type.simplified = getSimplifiedType(getIndexedAccessType(getIntersectionType(nonNeverTypes), type.indexType));
                 }
             }
-            // If the object type is a mapped type { [P in K]: E }, where K is generic, instantiate E using a mapper
-            // that substitutes the index type for P. For example, for an index access { [P in K]: Box<T[P]> }[X], we
-            // construct the type Box<T[X]>. We do not further simplify the result because mapped types can be recursive
-            // and we might never terminate.
             if (isGenericMappedType(objectType)) {
                 return type.simplified = substituteIndexedMappedType(objectType, type);
             }
-            if (objectType.flags & 65536 /* TypeParameter */) {
+            if (objectType.flags & 65536) {
                 var constraint = getConstraintFromTypeParameter(objectType);
                 if (constraint && isGenericMappedType(constraint)) {
                     return type.simplified = substituteIndexedMappedType(constraint, type);
@@ -37180,16 +30698,10 @@ var ts;
             if (objectType === wildcardType || indexType === wildcardType) {
                 return wildcardType;
             }
-            // If the index type is generic, or if the object type is generic and doesn't originate in an expression,
-            // we are performing a higher-order index access where we cannot meaningfully access the properties of the
-            // object type. Note that for a generic T and a non-generic K, we eagerly resolve T[K] if it originates in
-            // an expression. This is to preserve backwards compatibility. For example, an element access 'this["foo"]'
-            // has always been resolved eagerly using the constraint type of 'this' at the given location.
-            if (isGenericIndexType(indexType) || !(accessNode && accessNode.kind === 186 /* ElementAccessExpression */) && isGenericObjectType(objectType)) {
-                if (objectType.flags & 3 /* AnyOrUnknown */) {
+            if (isGenericIndexType(indexType) || !(accessNode && accessNode.kind === 186) && isGenericObjectType(objectType)) {
+                if (objectType.flags & 3) {
                     return objectType;
                 }
-                // Defer the operation by creating an indexed access type.
                 var id = objectType.id + "," + indexType.id;
                 var type = indexedAccessTypes.get(id);
                 if (!type) {
@@ -37197,15 +30709,12 @@ var ts;
                 }
                 return type;
             }
-            // In the following we resolve T[K] to the type of the property in T selected by K.
-            // We treat boolean as different from other unions to improve errors;
-            // skipping straight to getPropertyTypeForIndexType gives errors with 'boolean' instead of 'true'.
             var apparentObjectType = getApparentType(objectType);
-            if (indexType.flags & 262144 /* Union */ && !(indexType.flags & 16 /* Boolean */)) {
+            if (indexType.flags & 262144 && !(indexType.flags & 16)) {
                 var propTypes = [];
                 for (var _i = 0, _a = indexType.types; _i < _a.length; _i++) {
                     var t = _a[_i];
-                    var propType = getPropertyTypeForIndexType(apparentObjectType, t, accessNode, /*cacheSymbol*/ false);
+                    var propType = getPropertyTypeForIndexType(apparentObjectType, t, accessNode, false);
                     if (propType === errorType) {
                         return errorType;
                     }
@@ -37213,7 +30722,7 @@ var ts;
                 }
                 return getUnionType(propTypes);
             }
-            return getPropertyTypeForIndexType(apparentObjectType, indexType, accessNode, /*cacheSymbol*/ true);
+            return getPropertyTypeForIndexType(apparentObjectType, indexType, accessNode, true);
         }
         function getTypeFromIndexedAccessTypeNode(node) {
             var links = getNodeLinks(node);
@@ -37221,7 +30730,7 @@ var ts;
                 var objectType = getTypeFromTypeNode(node.objectType);
                 var indexType = getTypeFromTypeNode(node.indexType);
                 var resolved = getIndexedAccessType(objectType, indexType, node);
-                links.resolvedType = resolved.flags & 2097152 /* IndexedAccess */ &&
+                links.resolvedType = resolved.flags & 2097152 &&
                     resolved.objectType === objectType &&
                     resolved.indexType === indexType ?
                     getConstrainedTypeVariable(resolved, node) : resolved;
@@ -37231,19 +30740,17 @@ var ts;
         function getTypeFromMappedTypeNode(node) {
             var links = getNodeLinks(node);
             if (!links.resolvedType) {
-                var type = createObjectType(32 /* Mapped */, node.symbol);
+                var type = createObjectType(32, node.symbol);
                 type.declaration = node;
                 type.aliasSymbol = getAliasSymbolForTypeNode(node);
                 type.aliasTypeArguments = getTypeArgumentsForAliasSymbol(type.aliasSymbol);
                 links.resolvedType = type;
-                // Eagerly resolve the constraint type which forces an error if the constraint type circularly
-                // references itself through one or more type aliases.
                 getConstraintTypeFromMappedType(type);
             }
             return links.resolvedType;
         }
         function getActualTypeVariable(type) {
-            return type.flags & 8388608 /* Substitution */ ? type.typeVariable : type;
+            return type.flags & 8388608 ? type.typeVariable : type;
         }
         function getConditionalType(root, mapper) {
             var checkType = instantiateType(root.checkType, mapper);
@@ -37251,56 +30758,39 @@ var ts;
             if (checkType === wildcardType || extendsType === wildcardType) {
                 return wildcardType;
             }
-            // If this is a distributive conditional type and the check type is generic we need to defer
-            // resolution of the conditional type such that a later instantiation will properly distribute
-            // over union types.
-            var isDeferred = root.isDistributive && maybeTypeOfKind(checkType, 15794176 /* Instantiable */);
+            var isDeferred = root.isDistributive && maybeTypeOfKind(checkType, 15794176);
             var combinedMapper;
             if (root.inferTypeParameters) {
-                var context = createInferenceContext(root.inferTypeParameters, /*signature*/ undefined, 0 /* None */);
+                var context = createInferenceContext(root.inferTypeParameters, undefined, 0);
                 if (!isDeferred) {
-                    // We don't want inferences from constraints as they may cause us to eagerly resolve the
-                    // conditional type instead of deferring resolution. Also, we always want strict function
-                    // types rules (i.e. proper contravariance) for inferences.
-                    inferTypes(context.inferences, checkType, extendsType, 32 /* NoConstraints */ | 64 /* AlwaysStrict */);
+                    inferTypes(context.inferences, checkType, extendsType, 32 | 64);
                 }
                 combinedMapper = combineTypeMappers(mapper, context);
             }
             if (!isDeferred) {
-                if (extendsType.flags & 3 /* AnyOrUnknown */) {
+                if (extendsType.flags & 3) {
                     return instantiateType(root.trueType, mapper);
                 }
-                // Return union of trueType and falseType for 'any' since it matches anything
-                if (checkType.flags & 1 /* Any */) {
+                if (checkType.flags & 1) {
                     return getUnionType([instantiateType(root.trueType, combinedMapper || mapper), instantiateType(root.falseType, mapper)]);
                 }
-                // Instantiate the extends type including inferences for 'infer T' type parameters
                 var inferredExtendsType = combinedMapper ? instantiateType(root.extendsType, combinedMapper) : extendsType;
-                // Return falseType for a definitely false extends check. We check an instantations of the two
-                // types with type parameters mapped to the wildcard type, the most permissive instantiations
-                // possible (the wildcard type is assignable to and from all types). If those are not related,
-                // then no instatiations will be and we can just return the false branch type.
                 if (!isTypeAssignableTo(getWildcardInstantiation(checkType), getWildcardInstantiation(inferredExtendsType))) {
                     return instantiateType(root.falseType, mapper);
                 }
-                // Return trueType for a definitely true extends check. The definitely assignable relation excludes
-                // type variable constraints from consideration. Without the definitely assignable relation, the type
-                //   type Foo<T extends { x: any }> = T extends { x: string } ? string : number
-                // would immediately resolve to 'string' instead of being deferred.
-                if (checkTypeRelatedTo(checkType, inferredExtendsType, definitelyAssignableRelation, /*errorNode*/ undefined)) {
+                if (checkTypeRelatedTo(checkType, inferredExtendsType, definitelyAssignableRelation, undefined)) {
                     return instantiateType(root.trueType, combinedMapper || mapper);
                 }
             }
-            // Return a deferred type for a check that is neither definitely true nor definitely false
             var erasedCheckType = getActualTypeVariable(checkType);
-            var result = createType(4194304 /* Conditional */);
+            var result = createType(4194304);
             result.root = root;
             result.checkType = erasedCheckType;
             result.extendsType = extendsType;
             result.mapper = mapper;
             result.combinedMapper = combinedMapper;
             result.aliasSymbol = root.aliasSymbol;
-            result.aliasTypeArguments = instantiateTypes(root.aliasTypeArguments, mapper); // TODO: GH#18217
+            result.aliasTypeArguments = instantiateTypes(root.aliasTypeArguments, mapper);
             return result;
         }
         function getTrueTypeFromConditionalType(type) {
@@ -37313,7 +30803,7 @@ var ts;
             var result;
             if (node.locals) {
                 node.locals.forEach(function (symbol) {
-                    if (symbol.flags & 262144 /* TypeParameter */) {
+                    if (symbol.flags & 262144) {
                         result = ts.append(result, getDeclaredTypeOfSymbol(symbol));
                     }
                 });
@@ -37325,7 +30815,7 @@ var ts;
                 return true;
             }
             while (node) {
-                if (node.kind === 171 /* ConditionalType */) {
+                if (node.kind === 171) {
                     if (isTypeParameterPossiblyReferenced(tp, node.extendsType)) {
                         return true;
                     }
@@ -37340,7 +30830,7 @@ var ts;
                 var checkType = getTypeFromTypeNode(node.checkType);
                 var aliasSymbol = getAliasSymbolForTypeNode(node);
                 var aliasTypeArguments = getTypeArgumentsForAliasSymbol(aliasSymbol);
-                var allOuterTypeParameters = getOuterTypeParameters(node, /*includeThisTypes*/ true);
+                var allOuterTypeParameters = getOuterTypeParameters(node, true);
                 var outerTypeParameters = aliasTypeArguments ? allOuterTypeParameters : ts.filter(allOuterTypeParameters, function (tp) { return isPossiblyReferencedInConditionalType(tp, node); });
                 var root = {
                     node: node,
@@ -37348,14 +30838,14 @@ var ts;
                     extendsType: getTypeFromTypeNode(node.extendsType),
                     trueType: getTypeFromTypeNode(node.trueType),
                     falseType: getTypeFromTypeNode(node.falseType),
-                    isDistributive: !!(checkType.flags & 65536 /* TypeParameter */),
+                    isDistributive: !!(checkType.flags & 65536),
                     inferTypeParameters: getInferTypeParameters(node),
                     outerTypeParameters: outerTypeParameters,
                     instantiations: undefined,
                     aliasSymbol: aliasSymbol,
                     aliasTypeArguments: aliasTypeArguments
                 };
-                links.resolvedType = getConditionalType(root, /*mapper*/ undefined);
+                links.resolvedType = getConditionalType(root, undefined);
                 if (outerTypeParameters) {
                     root.instantiations = ts.createMap();
                     root.instantiations.set(getTypeListId(outerTypeParameters), links.resolvedType);
@@ -37381,7 +30871,7 @@ var ts;
         function getTypeFromImportTypeNode(node) {
             var links = getNodeLinks(node);
             if (!links.resolvedType) {
-                if (node.isTypeOf && node.typeArguments) { // Only the non-typeof form can make use of type arguments
+                if (node.isTypeOf && node.typeArguments) {
                     error(node, ts.Diagnostics.Type_arguments_cannot_be_used_here);
                     links.resolvedSymbol = unknownSymbol;
                     return links.resolvedType = errorType;
@@ -37392,21 +30882,20 @@ var ts;
                     return links.resolvedType = errorType;
                 }
                 var argumentType = getTypeFromTypeNode(node.argument);
-                var targetMeaning = node.isTypeOf ? 67216319 /* Value */ : 67901928 /* Type */;
-                // TODO: Future work: support unions/generics/whatever via a deferred import-type
+                var targetMeaning = node.isTypeOf ? 67216319 : 67901928;
                 var moduleName = argumentType.value;
-                var innerModuleSymbol = resolveExternalModule(node, moduleName, ts.Diagnostics.Cannot_find_module_0, node, /*isForAugmentation*/ false);
+                var innerModuleSymbol = resolveExternalModule(node, moduleName, ts.Diagnostics.Cannot_find_module_0, node, false);
                 if (!innerModuleSymbol) {
                     links.resolvedSymbol = unknownSymbol;
                     return links.resolvedType = errorType;
                 }
-                var moduleSymbol_1 = resolveExternalModuleSymbol(innerModuleSymbol, /*dontResolveAlias*/ false);
+                var moduleSymbol_1 = resolveExternalModuleSymbol(innerModuleSymbol, false);
                 if (!ts.nodeIsMissing(node.qualifier)) {
                     var nameStack = getIdentifierChain(node.qualifier);
                     var currentNamespace = moduleSymbol_1;
                     var current = void 0;
                     while (current = nameStack.shift()) {
-                        var meaning = nameStack.length ? 1920 /* Namespace */ : targetMeaning;
+                        var meaning = nameStack.length ? 1920 : targetMeaning;
                         var next = getSymbol(getExportsOfSymbol(getMergedSymbol(resolveSymbol(currentNamespace))), current.escapedText, meaning);
                         if (!next) {
                             error(current, ts.Diagnostics.Namespace_0_has_no_exported_member_1, getFullyQualifiedName(currentNamespace), ts.declarationNameToString(current));
@@ -37423,34 +30912,33 @@ var ts;
                         resolveImportSymbolType(node, links, moduleSymbol_1, targetMeaning);
                     }
                     else {
-                        error(node, targetMeaning === 67216319 /* Value */ ? ts.Diagnostics.Module_0_does_not_refer_to_a_value_but_is_used_as_a_value_here : ts.Diagnostics.Module_0_does_not_refer_to_a_type_but_is_used_as_a_type_here, moduleName);
+                        error(node, targetMeaning === 67216319 ? ts.Diagnostics.Module_0_does_not_refer_to_a_value_but_is_used_as_a_value_here : ts.Diagnostics.Module_0_does_not_refer_to_a_type_but_is_used_as_a_type_here, moduleName);
                         links.resolvedSymbol = unknownSymbol;
                         links.resolvedType = errorType;
                     }
                 }
             }
-            return links.resolvedType; // TODO: GH#18217
+            return links.resolvedType;
         }
         function resolveImportSymbolType(node, links, symbol, meaning) {
             var resolvedSymbol = resolveSymbol(symbol);
             links.resolvedSymbol = resolvedSymbol;
-            if (meaning === 67216319 /* Value */) {
-                return links.resolvedType = getTypeOfSymbol(symbol); // intentionally doesn't use resolved symbol so type is cached as expected on the alias
+            if (meaning === 67216319) {
+                return links.resolvedType = getTypeOfSymbol(symbol);
             }
             else {
-                return links.resolvedType = getTypeReferenceType(node, resolvedSymbol); // getTypeReferenceType doesn't handle aliases - it must get the resolved symbol
+                return links.resolvedType = getTypeReferenceType(node, resolvedSymbol);
             }
         }
         function getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node) {
             var links = getNodeLinks(node);
             if (!links.resolvedType) {
-                // Deferred resolution of members is handled by resolveObjectTypeMembers
                 var aliasSymbol = getAliasSymbolForTypeNode(node);
                 if (getMembersOfSymbol(node.symbol).size === 0 && !aliasSymbol) {
                     links.resolvedType = emptyTypeLiteralType;
                 }
                 else {
-                    var type = createObjectType(16 /* Anonymous */, node.symbol);
+                    var type = createObjectType(16, node.symbol);
                     type.aliasSymbol = aliasSymbol;
                     type.aliasTypeArguments = getTypeArgumentsForAliasSymbol(aliasSymbol);
                     if (ts.isJSDocTypeLiteral(node) && node.isArrayType) {
@@ -37467,31 +30955,26 @@ var ts;
         function getTypeArgumentsForAliasSymbol(symbol) {
             return symbol ? getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol) : undefined;
         }
-        /**
-         * Since the source of spread types are object literals, which are not binary,
-         * this function should be called in a left folding style, with left = previous result of getSpreadType
-         * and right = the new element to be spread.
-         */
         function getSpreadType(left, right, symbol, typeFlags, objectFlags) {
-            if (left.flags & 1 /* Any */ || right.flags & 1 /* Any */) {
+            if (left.flags & 1 || right.flags & 1) {
                 return anyType;
             }
-            if (left.flags & 2 /* Unknown */ || right.flags & 2 /* Unknown */) {
+            if (left.flags & 2 || right.flags & 2) {
                 return unknownType;
             }
-            if (left.flags & 32768 /* Never */) {
+            if (left.flags & 32768) {
                 return right;
             }
-            if (right.flags & 32768 /* Never */) {
+            if (right.flags & 32768) {
                 return left;
             }
-            if (left.flags & 262144 /* Union */) {
+            if (left.flags & 262144) {
                 return mapType(left, function (t) { return getSpreadType(t, right, symbol, typeFlags, objectFlags); });
             }
-            if (right.flags & 262144 /* Union */) {
+            if (right.flags & 262144) {
                 return mapType(right, function (t) { return getSpreadType(left, t, symbol, typeFlags, objectFlags); });
             }
-            if (right.flags & (272 /* BooleanLike */ | 168 /* NumberLike */ | 68 /* StringLike */ | 544 /* EnumLike */ | 16777216 /* NonPrimitive */ | 1048576 /* Index */)) {
+            if (right.flags & (272 | 168 | 68 | 544 | 16777216 | 1048576)) {
                 return left;
             }
             var members = ts.createSymbolTable();
@@ -37499,19 +30982,17 @@ var ts;
             var stringIndexInfo;
             var numberIndexInfo;
             if (left === emptyObjectType) {
-                // for the first spread element, left === emptyObjectType, so take the right's string indexer
-                stringIndexInfo = getIndexInfoOfType(right, 0 /* String */);
-                numberIndexInfo = getIndexInfoOfType(right, 1 /* Number */);
+                stringIndexInfo = getIndexInfoOfType(right, 0);
+                numberIndexInfo = getIndexInfoOfType(right, 1);
             }
             else {
-                stringIndexInfo = unionSpreadIndexInfos(getIndexInfoOfType(left, 0 /* String */), getIndexInfoOfType(right, 0 /* String */));
-                numberIndexInfo = unionSpreadIndexInfos(getIndexInfoOfType(left, 1 /* Number */), getIndexInfoOfType(right, 1 /* Number */));
+                stringIndexInfo = unionSpreadIndexInfos(getIndexInfoOfType(left, 0), getIndexInfoOfType(right, 0));
+                numberIndexInfo = unionSpreadIndexInfos(getIndexInfoOfType(left, 1), getIndexInfoOfType(right, 1));
             }
             for (var _i = 0, _a = getPropertiesOfType(right); _i < _a.length; _i++) {
                 var rightProp = _a[_i];
-                // we approximate own properties as non-methods plus methods that are inside the object literal
-                var isSetterWithoutGetter = rightProp.flags & 65536 /* SetAccessor */ && !(rightProp.flags & 32768 /* GetAccessor */);
-                if (ts.getDeclarationModifierFlagsFromSymbol(rightProp) & (8 /* Private */ | 16 /* Protected */)) {
+                var isSetterWithoutGetter = rightProp.flags & 65536 && !(rightProp.flags & 32768);
+                if (ts.getDeclarationModifierFlagsFromSymbol(rightProp) & (8 | 16)) {
                     skippedPrivateMembers.set(rightProp.escapedName, true);
                 }
                 else if (!isClassMethod(rightProp) && !isSetterWithoutGetter) {
@@ -37520,7 +31001,7 @@ var ts;
             }
             for (var _b = 0, _c = getPropertiesOfType(left); _b < _c.length; _b++) {
                 var leftProp = _c[_b];
-                if (leftProp.flags & 65536 /* SetAccessor */ && !(leftProp.flags & 32768 /* GetAccessor */)
+                if (leftProp.flags & 65536 && !(leftProp.flags & 32768)
                     || skippedPrivateMembers.has(leftProp.escapedName)
                     || isClassMethod(leftProp)) {
                     continue;
@@ -37528,11 +31009,11 @@ var ts;
                 if (members.has(leftProp.escapedName)) {
                     var rightProp = members.get(leftProp.escapedName);
                     var rightType = getTypeOfSymbol(rightProp);
-                    if (rightProp.flags & 16777216 /* Optional */) {
+                    if (rightProp.flags & 16777216) {
                         var declarations = ts.concatenate(leftProp.declarations, rightProp.declarations);
-                        var flags = 4 /* Property */ | (leftProp.flags & 16777216 /* Optional */);
+                        var flags = 4 | (leftProp.flags & 16777216);
                         var result = createSymbol(flags, leftProp.escapedName);
-                        result.type = getUnionType([getTypeOfSymbol(leftProp), getTypeWithFacts(rightType, 131072 /* NEUndefined */)]);
+                        result.type = getUnionType([getTypeOfSymbol(leftProp), getTypeWithFacts(rightType, 131072)]);
                         result.leftSpread = leftProp;
                         result.rightSpread = rightProp;
                         result.declarations = declarations;
@@ -37545,15 +31026,15 @@ var ts;
                 }
             }
             var spread = createAnonymousType(symbol, members, ts.emptyArray, ts.emptyArray, getNonReadonlyIndexSignature(stringIndexInfo), getNonReadonlyIndexSignature(numberIndexInfo));
-            spread.flags |= typeFlags | 268435456 /* ContainsObjectLiteral */;
-            spread.objectFlags |= objectFlags | (128 /* ObjectLiteral */ | 1024 /* ContainsSpread */);
+            spread.flags |= typeFlags | 268435456;
+            spread.objectFlags |= objectFlags | (128 | 1024);
             return spread;
         }
         function getNonReadonlySymbol(prop) {
             if (!isReadonlySymbol(prop)) {
                 return prop;
             }
-            var flags = 4 /* Property */ | (prop.flags & 16777216 /* Optional */);
+            var flags = 4 | (prop.flags & 16777216);
             var result = createSymbol(flags, prop.escapedName);
             result.type = getTypeOfSymbol(prop);
             result.declarations = prop.declarations;
@@ -37563,12 +31044,12 @@ var ts;
         }
         function getNonReadonlyIndexSignature(index) {
             if (index && index.isReadonly) {
-                return createIndexInfo(index.type, /*isReadonly*/ false, index.declaration);
+                return createIndexInfo(index.type, false, index.declaration);
             }
             return index;
         }
         function isClassMethod(prop) {
-            return prop.flags & 8192 /* Method */ && ts.find(prop.declarations, function (decl) { return ts.isClassLike(decl.parent); });
+            return prop.flags & 8192 && ts.find(prop.declarations, function (decl) { return ts.isClassLike(decl.parent); });
         }
         function createLiteralType(flags, value, symbol) {
             var type = createType(flags);
@@ -37577,9 +31058,9 @@ var ts;
             return type;
         }
         function getFreshTypeOfLiteralType(type) {
-            if (type.flags & 192 /* StringOrNumberLiteral */ && !(type.flags & 33554432 /* FreshLiteral */)) {
+            if (type.flags & 192 && !(type.flags & 33554432)) {
                 if (!type.freshType) {
-                    var freshType = createLiteralType(type.flags | 33554432 /* FreshLiteral */, type.value, type.symbol);
+                    var freshType = createLiteralType(type.flags | 33554432, type.value, type.symbol);
                     freshType.regularType = type;
                     type.freshType = freshType;
                 }
@@ -37588,20 +31069,16 @@ var ts;
             return type;
         }
         function getRegularTypeOfLiteralType(type) {
-            return type.flags & 192 /* StringOrNumberLiteral */ && type.flags & 33554432 /* FreshLiteral */ ? type.regularType :
-                type.flags & 262144 /* Union */ ? getUnionType(ts.sameMap(type.types, getRegularTypeOfLiteralType)) :
+            return type.flags & 192 && type.flags & 33554432 ? type.regularType :
+                type.flags & 262144 ? getUnionType(ts.sameMap(type.types, getRegularTypeOfLiteralType)) :
                     type;
         }
         function getLiteralType(value, enumId, symbol) {
-            // We store all literal types in a single map with keys of the form '#NNN' and '@SSS',
-            // where NNN is the text representation of a numeric literal and SSS are the characters
-            // of a string literal. For literal enum members we use 'EEE#NNN' and 'EEE@SSS', where
-            // EEE is a unique id for the containing enum type.
             var qualifier = typeof value === "number" ? "#" : "@";
             var key = enumId ? enumId + qualifier + value : qualifier + value;
             var type = literalTypes.get(key);
             if (!type) {
-                var flags = (typeof value === "number" ? 128 /* NumberLiteral */ : 64 /* StringLiteral */) | (enumId ? 512 /* EnumLiteral */ : 0);
+                var flags = (typeof value === "number" ? 128 : 64) | (enumId ? 512 : 0);
                 literalTypes.set(key, type = createLiteralType(flags, value, symbol));
             }
             return type;
@@ -37614,7 +31091,7 @@ var ts;
             return links.resolvedType;
         }
         function createUniqueESSymbolType(symbol) {
-            var type = createType(2048 /* UniqueESSymbol */);
+            var type = createType(2048);
             type.symbol = symbol;
             return type;
         }
@@ -37627,11 +31104,11 @@ var ts;
             return esSymbolType;
         }
         function getThisType(node) {
-            var container = ts.getThisContainer(node, /*includeArrowFunctions*/ false);
+            var container = ts.getThisContainer(node, false);
             var parent = container && container.parent;
-            if (parent && (ts.isClassLike(parent) || parent.kind === 236 /* InterfaceDeclaration */)) {
-                if (!ts.hasModifier(container, 32 /* Static */) &&
-                    (container.kind !== 155 /* Constructor */ || ts.isNodeDescendantOf(node, container.body))) {
+            if (parent && (ts.isClassLike(parent) || parent.kind === 236)) {
+                if (!ts.hasModifier(container, 32) &&
+                    (container.kind !== 155 || ts.isNodeDescendantOf(node, container.body))) {
                     return getDeclaredTypeOfClassOrInterface(getSymbolOfNode(parent)).thisType;
                 }
             }
@@ -37647,86 +31124,84 @@ var ts;
         }
         function getTypeFromTypeNode(node) {
             switch (node.kind) {
-                case 119 /* AnyKeyword */:
-                case 279 /* JSDocAllType */:
-                case 280 /* JSDocUnknownType */:
+                case 119:
+                case 279:
+                case 280:
                     return anyType;
-                case 142 /* UnknownKeyword */:
+                case 142:
                     return unknownType;
-                case 137 /* StringKeyword */:
+                case 137:
                     return stringType;
-                case 134 /* NumberKeyword */:
+                case 134:
                     return numberType;
-                case 122 /* BooleanKeyword */:
+                case 122:
                     return booleanType;
-                case 138 /* SymbolKeyword */:
+                case 138:
                     return esSymbolType;
-                case 105 /* VoidKeyword */:
+                case 105:
                     return voidType;
-                case 140 /* UndefinedKeyword */:
+                case 140:
                     return undefinedType;
-                case 95 /* NullKeyword */:
+                case 95:
                     return nullType;
-                case 131 /* NeverKeyword */:
+                case 131:
                     return neverType;
-                case 135 /* ObjectKeyword */:
-                    return node.flags & 65536 /* JavaScriptFile */ ? anyType : nonPrimitiveType;
-                case 174 /* ThisType */:
-                case 99 /* ThisKeyword */:
+                case 135:
+                    return node.flags & 65536 ? anyType : nonPrimitiveType;
+                case 174:
+                case 99:
                     return getTypeFromThisTypeNode(node);
-                case 178 /* LiteralType */:
+                case 178:
                     return getTypeFromLiteralTypeNode(node);
-                case 162 /* TypeReference */:
+                case 162:
                     return getTypeFromTypeReference(node);
-                case 161 /* TypePredicate */:
+                case 161:
                     return booleanType;
-                case 207 /* ExpressionWithTypeArguments */:
+                case 207:
                     return getTypeFromTypeReference(node);
-                case 165 /* TypeQuery */:
+                case 165:
                     return getTypeFromTypeQueryNode(node);
-                case 167 /* ArrayType */:
+                case 167:
                     return getTypeFromArrayTypeNode(node);
-                case 168 /* TupleType */:
+                case 168:
                     return getTypeFromTupleTypeNode(node);
-                case 169 /* UnionType */:
+                case 169:
                     return getTypeFromUnionTypeNode(node);
-                case 170 /* IntersectionType */:
+                case 170:
                     return getTypeFromIntersectionTypeNode(node);
-                case 281 /* JSDocNullableType */:
+                case 281:
                     return getTypeFromJSDocNullableTypeNode(node);
-                case 283 /* JSDocOptionalType */:
+                case 283:
                     return addOptionality(getTypeFromTypeNode(node.type));
-                case 173 /* ParenthesizedType */:
-                case 282 /* JSDocNonNullableType */:
-                case 278 /* JSDocTypeExpression */:
+                case 173:
+                case 282:
+                case 278:
                     return getTypeFromTypeNode(node.type);
-                case 285 /* JSDocVariadicType */:
+                case 285:
                     return getTypeFromJSDocVariadicType(node);
-                case 163 /* FunctionType */:
-                case 164 /* ConstructorType */:
-                case 166 /* TypeLiteral */:
-                case 287 /* JSDocTypeLiteral */:
-                case 284 /* JSDocFunctionType */:
-                case 288 /* JSDocSignature */:
+                case 163:
+                case 164:
+                case 166:
+                case 287:
+                case 284:
+                case 288:
                     return getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node);
-                case 175 /* TypeOperator */:
+                case 175:
                     return getTypeFromTypeOperatorNode(node);
-                case 176 /* IndexedAccessType */:
+                case 176:
                     return getTypeFromIndexedAccessTypeNode(node);
-                case 177 /* MappedType */:
+                case 177:
                     return getTypeFromMappedTypeNode(node);
-                case 171 /* ConditionalType */:
+                case 171:
                     return getTypeFromConditionalTypeNode(node);
-                case 172 /* InferType */:
+                case 172:
                     return getTypeFromInferTypeNode(node);
-                case 179 /* ImportType */:
+                case 179:
                     return getTypeFromImportTypeNode(node);
-                // This function assumes that an identifier or qualified name is a type expression
-                // Callers should first ensure this by calling isTypeNode
-                case 71 /* Identifier */:
-                case 146 /* QualifiedName */:
+                case 71:
+                case 146:
                     var symbol = getSymbolAtLocation(node);
-                    return (symbol && getDeclaredTypeOfSymbol(symbol)); // TODO: GH#18217
+                    return (symbol && getDeclaredTypeOfSymbol(symbol));
                 default:
                     return errorType;
             }
@@ -37777,12 +31252,8 @@ var ts;
                     makeArrayTypeMapper(sources, targets);
         }
         function createTypeEraser(sources) {
-            return createTypeMapper(sources, /*targets*/ undefined);
+            return createTypeMapper(sources, undefined);
         }
-        /**
-         * Maps forward-references to later types parameters to the empty object type.
-         * This is used during inference when instantiating type parameter defaults.
-         */
         function createBackreferenceMapper(typeParameters, index) {
             return function (t) { return typeParameters.indexOf(t) >= index ? emptyObjectType : t; };
         }
@@ -37791,7 +31262,7 @@ var ts;
         }
         function cloneTypeMapper(mapper) {
             return mapper && isInferenceContext(mapper) ?
-                createInferenceContext(mapper.typeParameters, mapper.signature, mapper.flags | 2 /* NoDefault */, mapper.compareTypes, mapper.inferences) :
+                createInferenceContext(mapper.typeParameters, mapper.signature, mapper.flags | 2, mapper.compareTypes, mapper.inferences) :
                 mapper;
         }
         function combineTypeMappers(mapper1, mapper2) {
@@ -37805,10 +31276,10 @@ var ts;
             return function (t) { return t === source ? target : baseMapper(t); };
         }
         function wildcardMapper(type) {
-            return type.flags & 65536 /* TypeParameter */ ? wildcardType : type;
+            return type.flags & 65536 ? wildcardType : type;
         }
         function cloneTypeParameter(typeParameter) {
-            var result = createType(65536 /* TypeParameter */);
+            var result = createType(65536);
             result.symbol = typeParameter.symbol;
             result.target = typeParameter;
             return result;
@@ -37816,7 +31287,7 @@ var ts;
         function instantiateTypePredicate(predicate, mapper) {
             if (ts.isIdentifierTypePredicate(predicate)) {
                 return {
-                    kind: 1 /* Identifier */,
+                    kind: 1,
                     parameterName: predicate.parameterName,
                     parameterIndex: predicate.parameterIndex,
                     type: instantiateType(predicate.type, mapper)
@@ -37824,7 +31295,7 @@ var ts;
             }
             else {
                 return {
-                    kind: 0 /* This */,
+                    kind: 0,
                     type: instantiateType(predicate.type, mapper)
                 };
             }
@@ -37832,9 +31303,6 @@ var ts;
         function instantiateSignature(signature, mapper, eraseTypeParameters) {
             var freshTypeParameters;
             if (signature.typeParameters && !eraseTypeParameters) {
-                // First create a fresh set of type parameters, then include a mapping from the old to the
-                // new type parameters in the mapper function. Finally store this mapper in the new type
-                // parameters such that we can use it when instantiating constraints.
                 freshTypeParameters = ts.map(signature.typeParameters, cloneTypeParameter);
                 mapper = combineTypeMappers(createTypeMapper(signature.typeParameters, freshTypeParameters), mapper);
                 for (var _i = 0, freshTypeParameters_1 = freshTypeParameters; _i < freshTypeParameters_1.length; _i++) {
@@ -37842,33 +31310,21 @@ var ts;
                     tp.mapper = mapper;
                 }
             }
-            // Don't compute resolvedReturnType and resolvedTypePredicate now,
-            // because using `mapper` now could trigger inferences to become fixed. (See `createInferenceContext`.)
-            // See GH#17600.
-            var result = createSignature(signature.declaration, freshTypeParameters, signature.thisParameter && instantiateSymbol(signature.thisParameter, mapper), instantiateList(signature.parameters, mapper, instantiateSymbol), 
-            /*resolvedReturnType*/ undefined, 
-            /*resolvedTypePredicate*/ undefined, signature.minArgumentCount, signature.hasRestParameter, signature.hasLiteralTypes);
+            var result = createSignature(signature.declaration, freshTypeParameters, signature.thisParameter && instantiateSymbol(signature.thisParameter, mapper), instantiateList(signature.parameters, mapper, instantiateSymbol), undefined, undefined, signature.minArgumentCount, signature.hasRestParameter, signature.hasLiteralTypes);
             result.target = signature;
             result.mapper = mapper;
             return result;
         }
         function instantiateSymbol(symbol, mapper) {
             var links = getSymbolLinks(symbol);
-            if (links.type && !maybeTypeOfKind(links.type, 131072 /* Object */ | 15794176 /* Instantiable */)) {
-                // If the type of the symbol is already resolved, and if that type could not possibly
-                // be affected by instantiation, simply return the symbol itself.
+            if (links.type && !maybeTypeOfKind(links.type, 131072 | 15794176)) {
                 return symbol;
             }
-            if (ts.getCheckFlags(symbol) & 1 /* Instantiated */) {
-                // If symbol being instantiated is itself a instantiation, fetch the original target and combine the
-                // type mappers. This ensures that original type identities are properly preserved and that aliases
-                // always reference a non-aliases.
+            if (ts.getCheckFlags(symbol) & 1) {
                 symbol = links.target;
                 mapper = combineTypeMappers(links.mapper, mapper);
             }
-            // Keep the flags from the symbol we're instantiating.  Mark that is instantiated, and
-            // also transient so that we can just store data on it directly.
-            var result = createSymbol(symbol.flags, symbol.escapedName, 1 /* Instantiated */ | (ts.getCheckFlags(symbol) & 1024 /* Late */));
+            var result = createSymbol(symbol.flags, symbol.escapedName, 1 | (ts.getCheckFlags(symbol) & 1024));
             result.declarations = symbol.declarations;
             result.parent = symbol.parent;
             result.target = symbol;
@@ -37887,15 +31343,11 @@ var ts;
             return result;
         }
         function getAnonymousTypeInstantiation(type, mapper) {
-            var target = type.objectFlags & 64 /* Instantiated */ ? type.target : type;
+            var target = type.objectFlags & 64 ? type.target : type;
             var symbol = target.symbol;
             var links = getSymbolLinks(symbol);
             var typeParameters = links.outerTypeParameters;
             if (!typeParameters) {
-                // The first time an anonymous type is instantiated we compute and store a list of the type
-                // parameters that are in scope (and therefore potentially referenced). For type literals that
-                // aren't the right hand side of a generic type alias declaration we optimize by reducing the
-                // set of type parameters to those that are possibly referenced in the literal.
                 var declaration_1 = symbol.declarations[0];
                 if (ts.isInJavaScriptFile(declaration_1)) {
                     var paramTag = ts.findAncestor(declaration_1, ts.isJSDocParameterTag);
@@ -37906,13 +31358,13 @@ var ts;
                         }
                     }
                 }
-                var outerTypeParameters = getOuterTypeParameters(declaration_1, /*includeThisTypes*/ true);
+                var outerTypeParameters = getOuterTypeParameters(declaration_1, true);
                 if (isJavaScriptConstructor(declaration_1)) {
                     var templateTagParameters = getTypeParametersFromDeclaration(declaration_1);
                     outerTypeParameters = ts.addRange(outerTypeParameters, templateTagParameters);
                 }
                 typeParameters = outerTypeParameters || ts.emptyArray;
-                typeParameters = symbol.flags & 2048 /* TypeLiteral */ && !target.aliasTypeArguments ?
+                typeParameters = symbol.flags & 2048 && !target.aliasTypeArguments ?
                     ts.filter(typeParameters, function (tp) { return isTypeParameterPossiblyReferenced(tp, declaration_1); }) :
                     typeParameters;
                 links.outerTypeParameters = typeParameters;
@@ -37922,16 +31374,13 @@ var ts;
                 }
             }
             if (typeParameters.length) {
-                // We are instantiating an anonymous type that has one or more type parameters in scope. Apply the
-                // mapper to the type parameters to produce the effective list of type arguments, and compute the
-                // instantiation cache key from the type IDs of the type arguments.
-                var combinedMapper = type.objectFlags & 64 /* Instantiated */ ? combineTypeMappers(type.mapper, mapper) : mapper;
+                var combinedMapper = type.objectFlags & 64 ? combineTypeMappers(type.mapper, mapper) : mapper;
                 var typeArguments = ts.map(typeParameters, combinedMapper);
                 var id = getTypeListId(typeArguments);
                 var result = links.instantiations.get(id);
                 if (!result) {
                     var newMapper = createTypeMapper(typeParameters, typeArguments);
-                    result = target.objectFlags & 32 /* Mapped */ ? instantiateMappedType(target, newMapper) : instantiateAnonymousType(target, newMapper);
+                    result = target.objectFlags & 32 ? instantiateMappedType(target, newMapper) : instantiateAnonymousType(target, newMapper);
                     links.instantiations.set(id, result);
                 }
                 return result;
@@ -37939,43 +31388,35 @@ var ts;
             return type;
         }
         function maybeTypeParameterReference(node) {
-            return !(node.kind === 146 /* QualifiedName */ ||
-                node.parent.kind === 162 /* TypeReference */ && node.parent.typeArguments && node === node.parent.typeName);
+            return !(node.kind === 146 ||
+                node.parent.kind === 162 && node.parent.typeArguments && node === node.parent.typeName);
         }
         function isTypeParameterPossiblyReferenced(tp, node) {
-            // If the type parameter doesn't have exactly one declaration, if there are invening statement blocks
-            // between the node and the type parameter declaration, if the node contains actual references to the
-            // type parameter, or if the node contains type queries, we consider the type parameter possibly referenced.
             if (tp.symbol && tp.symbol.declarations && tp.symbol.declarations.length === 1) {
                 var container_3 = tp.symbol.declarations[0].parent;
-                if (ts.findAncestor(node, function (n) { return n.kind === 213 /* Block */ ? "quit" : n === container_3; })) {
+                if (ts.findAncestor(node, function (n) { return n.kind === 213 ? "quit" : n === container_3; })) {
                     return !!ts.forEachChild(node, containsReference);
                 }
             }
             return true;
             function containsReference(node) {
                 switch (node.kind) {
-                    case 174 /* ThisType */:
+                    case 174:
                         return !!tp.isThisType;
-                    case 71 /* Identifier */:
+                    case 71:
                         return !tp.isThisType && ts.isPartOfTypeNode(node) && maybeTypeParameterReference(node) &&
                             getTypeFromTypeNode(node) === tp;
-                    case 165 /* TypeQuery */:
+                    case 165:
                         return true;
                 }
                 return !!ts.forEachChild(node, containsReference);
             }
         }
         function instantiateMappedType(type, mapper) {
-            // Check if we have a homomorphic mapped type, i.e. a type of the form { [P in keyof T]: X } for some
-            // type variable T. If so, the mapped type is distributive over a union type and when T is instantiated
-            // to a union type A | B, we produce { [P in keyof A]: X } | { [P in keyof B]: X }. Furthermore, for
-            // homomorphic mapped types we leave primitive types alone. For example, when T is instantiated to a
-            // union type A | undefined, we produce { [P in keyof A]: X } | undefined.
             var constraintType = getConstraintTypeFromMappedType(type);
-            if (constraintType.flags & 1048576 /* Index */) {
+            if (constraintType.flags & 1048576) {
                 var typeVariable_1 = constraintType.type;
-                if (typeVariable_1.flags & 65536 /* TypeParameter */) {
+                if (typeVariable_1.flags & 65536) {
                     var mappedTypeVariable = instantiateType(typeVariable_1, mapper);
                     if (typeVariable_1 !== mappedTypeVariable) {
                         return mapType(mappedTypeVariable, function (t) {
@@ -37990,11 +31431,11 @@ var ts;
             return instantiateAnonymousType(type, mapper);
         }
         function isMappableType(type) {
-            return type.flags & (3 /* AnyOrUnknown */ | 14745600 /* InstantiableNonPrimitive */ | 131072 /* Object */ | 524288 /* Intersection */);
+            return type.flags & (3 | 14745600 | 131072 | 524288);
         }
         function instantiateAnonymousType(type, mapper) {
-            var result = createObjectType(type.objectFlags | 64 /* Instantiated */, type.symbol);
-            if (type.objectFlags & 32 /* Mapped */) {
+            var result = createObjectType(type.objectFlags | 64, type.symbol);
+            if (type.objectFlags & 32) {
                 result.declaration = type.declaration;
             }
             result.target = type;
@@ -38006,9 +31447,6 @@ var ts;
         function getConditionalTypeInstantiation(type, mapper) {
             var root = type.root;
             if (root.outerTypeParameters) {
-                // We are instantiating a conditional type that has one or more type parameters in scope. Apply the
-                // mapper to the type parameters to produce the effective list of type arguments, and compute the
-                // instantiation cache key from the type IDs of the type arguments.
                 var typeArguments = ts.map(root.outerTypeParameters, mapper);
                 var id = getTypeListId(typeArguments);
                 var result = root.instantiations.get(id);
@@ -38022,13 +31460,10 @@ var ts;
             return type;
         }
         function instantiateConditionalType(root, mapper) {
-            // Check if we have a conditional type where the check type is a naked type parameter. If so,
-            // the conditional type is distributive over union types and when T is instantiated to a union
-            // type A | B, we produce (A extends U ? X : Y) | (B extends U ? X : Y).
             if (root.isDistributive) {
                 var checkType_1 = root.checkType;
                 var instantiatedType = mapper(checkType_1);
-                if (checkType_1 !== instantiatedType && instantiatedType.flags & (262144 /* Union */ | 32768 /* Never */)) {
+                if (checkType_1 !== instantiatedType && instantiatedType.flags & (262144 | 32768)) {
                     return mapType(instantiatedType, function (t) { return getConditionalType(root, createReplacementMapper(checkType_1, t, mapper)); });
                 }
             }
@@ -38036,90 +31471,83 @@ var ts;
         }
         function instantiateType(type, mapper) {
             if (type && mapper && mapper !== identityMapper) {
-                if (type.flags & 65536 /* TypeParameter */) {
+                if (type.flags & 65536) {
                     return mapper(type);
                 }
-                if (type.flags & 131072 /* Object */) {
-                    if (type.objectFlags & 16 /* Anonymous */) {
-                        // If the anonymous type originates in a declaration of a function, method, class, or
-                        // interface, in an object type literal, or in an object literal expression, we may need
-                        // to instantiate the type because it might reference a type parameter.
-                        return type.symbol && type.symbol.flags & (16 /* Function */ | 8192 /* Method */ | 32 /* Class */ | 2048 /* TypeLiteral */ | 4096 /* ObjectLiteral */) && type.symbol.declarations ?
+                if (type.flags & 131072) {
+                    if (type.objectFlags & 16) {
+                        return type.symbol && type.symbol.flags & (16 | 8192 | 32 | 2048 | 4096) && type.symbol.declarations ?
                             getAnonymousTypeInstantiation(type, mapper) : type;
                     }
-                    if (type.objectFlags & 32 /* Mapped */) {
+                    if (type.objectFlags & 32) {
                         return getAnonymousTypeInstantiation(type, mapper);
                     }
-                    if (type.objectFlags & 4 /* Reference */) {
+                    if (type.objectFlags & 4) {
                         var typeArguments = type.typeArguments;
                         var newTypeArguments = instantiateTypes(typeArguments, mapper);
                         return newTypeArguments !== typeArguments ? createTypeReference(type.target, newTypeArguments) : type;
                     }
                 }
-                if (type.flags & 262144 /* Union */ && !(type.flags & 32764 /* Primitive */)) {
+                if (type.flags & 262144 && !(type.flags & 32764)) {
                     var types = type.types;
                     var newTypes = instantiateTypes(types, mapper);
-                    return newTypes !== types ? getUnionType(newTypes, 1 /* Literal */, type.aliasSymbol, instantiateTypes(type.aliasTypeArguments, mapper)) : type;
+                    return newTypes !== types ? getUnionType(newTypes, 1, type.aliasSymbol, instantiateTypes(type.aliasTypeArguments, mapper)) : type;
                 }
-                if (type.flags & 524288 /* Intersection */) {
+                if (type.flags & 524288) {
                     var types = type.types;
                     var newTypes = instantiateTypes(types, mapper);
                     return newTypes !== types ? getIntersectionType(newTypes, type.aliasSymbol, instantiateTypes(type.aliasTypeArguments, mapper)) : type;
                 }
-                if (type.flags & 1048576 /* Index */) {
+                if (type.flags & 1048576) {
                     return getIndexType(instantiateType(type.type, mapper));
                 }
-                if (type.flags & 2097152 /* IndexedAccess */) {
+                if (type.flags & 2097152) {
                     return getIndexedAccessType(instantiateType(type.objectType, mapper), instantiateType(type.indexType, mapper));
                 }
-                if (type.flags & 4194304 /* Conditional */) {
+                if (type.flags & 4194304) {
                     return getConditionalTypeInstantiation(type, combineTypeMappers(type.mapper, mapper));
                 }
-                if (type.flags & 8388608 /* Substitution */) {
+                if (type.flags & 8388608) {
                     return instantiateType(type.typeVariable, mapper);
                 }
             }
             return type;
         }
         function getWildcardInstantiation(type) {
-            return type.flags & (32764 /* Primitive */ | 3 /* AnyOrUnknown */ | 32768 /* Never */) ? type :
+            return type.flags & (32764 | 3 | 32768) ? type :
                 type.wildcardInstantiation || (type.wildcardInstantiation = instantiateType(type, wildcardMapper));
         }
         function instantiateIndexInfo(info, mapper) {
             return info && createIndexInfo(instantiateType(info.type, mapper), info.isReadonly, info.declaration);
         }
-        // Returns true if the given expression contains (at any level of nesting) a function or arrow expression
-        // that is subject to contextual typing.
         function isContextSensitive(node) {
-            ts.Debug.assert(node.kind !== 154 /* MethodDeclaration */ || ts.isObjectLiteralMethod(node));
+            ts.Debug.assert(node.kind !== 154 || ts.isObjectLiteralMethod(node));
             switch (node.kind) {
-                case 192 /* FunctionExpression */:
-                case 193 /* ArrowFunction */:
-                case 154 /* MethodDeclaration */:
+                case 192:
+                case 193:
+                case 154:
                     return isContextSensitiveFunctionLikeDeclaration(node);
-                case 184 /* ObjectLiteralExpression */:
+                case 184:
                     return ts.some(node.properties, isContextSensitive);
-                case 183 /* ArrayLiteralExpression */:
+                case 183:
                     return ts.some(node.elements, isContextSensitive);
-                case 201 /* ConditionalExpression */:
+                case 201:
                     return isContextSensitive(node.whenTrue) ||
                         isContextSensitive(node.whenFalse);
-                case 200 /* BinaryExpression */:
-                    return node.operatorToken.kind === 54 /* BarBarToken */ &&
+                case 200:
+                    return node.operatorToken.kind === 54 &&
                         (isContextSensitive(node.left) || isContextSensitive(node.right));
-                case 270 /* PropertyAssignment */:
+                case 270:
                     return isContextSensitive(node.initializer);
-                case 191 /* ParenthesizedExpression */:
+                case 191:
                     return isContextSensitive(node.expression);
-                case 263 /* JsxAttributes */:
+                case 263:
                     return ts.some(node.properties, isContextSensitive);
-                case 262 /* JsxAttribute */: {
-                    // If there is no initializer, JSX attribute has a boolean value of true which is not context sensitive.
+                case 262: {
                     var initializer = node.initializer;
                     return !!initializer && isContextSensitive(initializer);
                 }
-                case 265 /* JsxExpression */: {
-                    // It is possible to that node.expression is undefined (e.g <div x={} />)
+                case 265: {
                     var expression = node.expression;
                     return !!expression && isContextSensitive(expression);
                 }
@@ -38127,35 +31555,30 @@ var ts;
             return false;
         }
         function isContextSensitiveFunctionLikeDeclaration(node) {
-            // Functions with type parameters are not context sensitive.
             if (node.typeParameters) {
                 return false;
             }
-            // Functions with any parameters that lack type annotations are context sensitive.
             if (ts.some(node.parameters, function (p) { return !ts.getEffectiveTypeAnnotationNode(p); })) {
                 return true;
             }
-            if (node.kind !== 193 /* ArrowFunction */) {
-                // If the first parameter is not an explicit 'this' parameter, then the function has
-                // an implicit 'this' parameter which is subject to contextual typing.
+            if (node.kind !== 193) {
                 var parameter = ts.firstOrUndefined(node.parameters);
                 if (!(parameter && ts.parameterIsThisKeyword(parameter))) {
                     return true;
                 }
             }
-            // TODO(anhans): A block should be context-sensitive if it has a context-sensitive return value.
             var body = node.body;
-            return body.kind === 213 /* Block */ ? false : isContextSensitive(body);
+            return body.kind === 213 ? false : isContextSensitive(body);
         }
         function isContextSensitiveFunctionOrObjectLiteralMethod(func) {
             return (ts.isInJavaScriptFile(func) && ts.isFunctionDeclaration(func) || isFunctionExpressionOrArrowFunction(func) || ts.isObjectLiteralMethod(func)) &&
                 isContextSensitiveFunctionLikeDeclaration(func);
         }
         function getTypeWithoutSignatures(type) {
-            if (type.flags & 131072 /* Object */) {
+            if (type.flags & 131072) {
                 var resolved = resolveStructuredTypeMembers(type);
                 if (resolved.constructSignatures.length) {
-                    var result = createObjectType(16 /* Anonymous */, type.symbol);
+                    var result = createObjectType(16, type.symbol);
                     result.members = resolved.members;
                     result.properties = resolved.properties;
                     result.callSignatures = ts.emptyArray;
@@ -38163,20 +31586,19 @@ var ts;
                     return result;
                 }
             }
-            else if (type.flags & 524288 /* Intersection */) {
+            else if (type.flags & 524288) {
                 return getIntersectionType(ts.map(type.types, getTypeWithoutSignatures));
             }
             return type;
         }
-        // TYPE CHECKING
         function isTypeIdenticalTo(source, target) {
             return isTypeRelatedTo(source, target, identityRelation);
         }
         function compareTypesIdentical(source, target) {
-            return isTypeRelatedTo(source, target, identityRelation) ? -1 /* True */ : 0 /* False */;
+            return isTypeRelatedTo(source, target, identityRelation) ? -1 : 0;
         }
         function compareTypesAssignable(source, target) {
-            return isTypeRelatedTo(source, target, assignableRelation) ? -1 /* True */ : 0 /* False */;
+            return isTypeRelatedTo(source, target, assignableRelation) ? -1 : 0;
         }
         function isTypeSubtypeOf(source, target) {
             return isTypeRelatedTo(source, target, subtypeRelation);
@@ -38184,31 +31606,13 @@ var ts;
         function isTypeAssignableTo(source, target) {
             return isTypeRelatedTo(source, target, assignableRelation);
         }
-        // An object type S is considered to be derived from an object type T if
-        // S is a union type and every constituent of S is derived from T,
-        // T is a union type and S is derived from at least one constituent of T, or
-        // S is a type variable with a base constraint that is derived from T,
-        // T is one of the global types Object and Function and S is a subtype of T, or
-        // T occurs directly or indirectly in an 'extends' clause of S.
-        // Note that this check ignores type parameters and only considers the
-        // inheritance hierarchy.
         function isTypeDerivedFrom(source, target) {
-            return source.flags & 262144 /* Union */ ? ts.every(source.types, function (t) { return isTypeDerivedFrom(t, target); }) :
-                target.flags & 262144 /* Union */ ? ts.some(target.types, function (t) { return isTypeDerivedFrom(source, t); }) :
-                    source.flags & 14745600 /* InstantiableNonPrimitive */ ? isTypeDerivedFrom(getBaseConstraintOfType(source) || emptyObjectType, target) :
+            return source.flags & 262144 ? ts.every(source.types, function (t) { return isTypeDerivedFrom(t, target); }) :
+                target.flags & 262144 ? ts.some(target.types, function (t) { return isTypeDerivedFrom(source, t); }) :
+                    source.flags & 14745600 ? isTypeDerivedFrom(getBaseConstraintOfType(source) || emptyObjectType, target) :
                         target === globalObjectType || target === globalFunctionType ? isTypeSubtypeOf(source, target) :
                             hasBaseType(source, getTargetType(target));
         }
-        /**
-         * This is *not* a bi-directional relationship.
-         * If one needs to check both directions for comparability, use a second call to this function or 'checkTypeComparableTo'.
-         *
-         * A type S is comparable to a type T if some (but not necessarily all) of the possible values of S are also possible values of T.
-         * It is used to check following cases:
-         *   - the types of the left and right sides of equality/inequality operators (`===`, `!==`, `==`, `!=`).
-         *   - the types of `case` clause expressions and their respective `switch` expressions.
-         *   - the type of an expression in a type assertion with the type being asserted.
-         */
         function isTypeComparableTo(source, target) {
             return isTypeRelatedTo(source, target, comparableRelation);
         }
@@ -38218,48 +31622,38 @@ var ts;
         function checkTypeAssignableTo(source, target, errorNode, headMessage, containingMessageChain) {
             return checkTypeRelatedTo(source, target, assignableRelation, errorNode, headMessage, containingMessageChain);
         }
-        /**
-         * This is *not* a bi-directional relationship.
-         * If one needs to check both directions for comparability, use a second call to this function or 'isTypeComparableTo'.
-         */
         function checkTypeComparableTo(source, target, errorNode, headMessage, containingMessageChain) {
             return checkTypeRelatedTo(source, target, comparableRelation, errorNode, headMessage, containingMessageChain);
         }
         function isSignatureAssignableTo(source, target, ignoreReturnTypes) {
-            return compareSignaturesRelated(source, target, 0 /* None */, ignoreReturnTypes, /*reportErrors*/ false, 
-            /*errorReporter*/ undefined, compareTypesAssignable) !== 0 /* False */;
+            return compareSignaturesRelated(source, target, 0, ignoreReturnTypes, false, undefined, compareTypesAssignable) !== 0;
         }
-        /**
-         * See signatureRelatedTo, compareSignaturesIdentical
-         */
         function compareSignaturesRelated(source, target, callbackCheck, ignoreReturnTypes, reportErrors, errorReporter, compareTypes) {
-            // TODO (drosen): De-duplicate code between related functions.
             if (source === target) {
-                return -1 /* True */;
+                return -1;
             }
             if (!target.hasRestParameter && source.minArgumentCount > target.parameters.length) {
-                return 0 /* False */;
+                return 0;
             }
             if (source.typeParameters && source.typeParameters !== target.typeParameters) {
                 target = getCanonicalSignature(target);
-                source = instantiateSignatureInContextOf(source, target, /*contextualMapper*/ undefined, compareTypes);
+                source = instantiateSignatureInContextOf(source, target, undefined, compareTypes);
             }
-            var kind = target.declaration ? target.declaration.kind : 0 /* Unknown */;
-            var strictVariance = !callbackCheck && strictFunctionTypes && kind !== 154 /* MethodDeclaration */ &&
-                kind !== 153 /* MethodSignature */ && kind !== 155 /* Constructor */;
-            var result = -1 /* True */;
+            var kind = target.declaration ? target.declaration.kind : 0;
+            var strictVariance = !callbackCheck && strictFunctionTypes && kind !== 154 &&
+                kind !== 153 && kind !== 155;
+            var result = -1;
             var sourceThisType = getThisTypeOfSignature(source);
             if (sourceThisType && sourceThisType !== voidType) {
                 var targetThisType = getThisTypeOfSignature(target);
                 if (targetThisType) {
-                    // void sources are assignable to anything.
-                    var related = !strictVariance && compareTypes(sourceThisType, targetThisType, /*reportErrors*/ false)
+                    var related = !strictVariance && compareTypes(sourceThisType, targetThisType, false)
                         || compareTypes(targetThisType, sourceThisType, reportErrors);
                     if (!related) {
                         if (reportErrors) {
                             errorReporter(ts.Diagnostics.The_this_types_of_each_signature_are_incompatible);
                         }
-                        return 0 /* False */;
+                        return 0;
                     }
                     result &= related;
                 }
@@ -38272,27 +31666,18 @@ var ts;
             for (var i = 0; i < checkCount; i++) {
                 var sourceType = i < sourceMax ? getTypeOfParameter(sourceParams[i]) : getRestTypeOfSignature(source);
                 var targetType = i < targetMax ? getTypeOfParameter(targetParams[i]) : getRestTypeOfSignature(target);
-                // In order to ensure that any generic type Foo<T> is at least co-variant with respect to T no matter
-                // how Foo uses T, we need to relate parameters bi-variantly (given that parameters are input positions,
-                // they naturally relate only contra-variantly). However, if the source and target parameters both have
-                // function types with a single call signature, we know we are relating two callback parameters. In
-                // that case it is sufficient to only relate the parameters of the signatures co-variantly because,
-                // similar to return values, callback parameters are output positions. This means that a Promise<T>,
-                // where T is used only in callback parameter positions, will be co-variant (as opposed to bi-variant)
-                // with respect to T.
                 var sourceSig = callbackCheck ? undefined : getSingleCallSignature(getNonNullableType(sourceType));
                 var targetSig = callbackCheck ? undefined : getSingleCallSignature(getNonNullableType(targetType));
                 var callbacks = sourceSig && targetSig && !signatureHasTypePredicate(sourceSig) && !signatureHasTypePredicate(targetSig) &&
-                    (getFalsyFlags(sourceType) & 24576 /* Nullable */) === (getFalsyFlags(targetType) & 24576 /* Nullable */);
+                    (getFalsyFlags(sourceType) & 24576) === (getFalsyFlags(targetType) & 24576);
                 var related = callbacks ?
-                    // TODO: GH#18217 It will work if they're both `undefined`, but not if only one is
-                    compareSignaturesRelated(targetSig, sourceSig, strictVariance ? 2 /* Strict */ : 1 /* Bivariant */, /*ignoreReturnTypes*/ false, reportErrors, errorReporter, compareTypes) :
-                    !callbackCheck && !strictVariance && compareTypes(sourceType, targetType, /*reportErrors*/ false) || compareTypes(targetType, sourceType, reportErrors);
+                    compareSignaturesRelated(targetSig, sourceSig, strictVariance ? 2 : 1, false, reportErrors, errorReporter, compareTypes) :
+                    !callbackCheck && !strictVariance && compareTypes(sourceType, targetType, false) || compareTypes(targetType, sourceType, reportErrors);
                 if (!related) {
                     if (reportErrors) {
                         errorReporter(ts.Diagnostics.Types_of_parameters_0_and_1_are_incompatible, ts.symbolName(sourceParams[i < sourceMax ? i : sourceMax]), ts.symbolName(targetParams[i < targetMax ? i : targetMax]));
                     }
-                    return 0 /* False */;
+                    return 0;
                 }
                 result &= related;
             }
@@ -38302,25 +31687,21 @@ var ts;
                     return result;
                 }
                 var sourceReturnType = getReturnTypeOfSignature(source);
-                // The following block preserves behavior forbidding boolean returning functions from being assignable to type guard returning functions
                 var targetTypePredicate = getTypePredicateOfSignature(target);
                 if (targetTypePredicate) {
                     var sourceTypePredicate = getTypePredicateOfSignature(source);
                     if (sourceTypePredicate) {
-                        result &= compareTypePredicateRelatedTo(sourceTypePredicate, targetTypePredicate, source.declaration, target.declaration, reportErrors, errorReporter, compareTypes); // TODO: GH#18217
+                        result &= compareTypePredicateRelatedTo(sourceTypePredicate, targetTypePredicate, source.declaration, target.declaration, reportErrors, errorReporter, compareTypes);
                     }
                     else if (ts.isIdentifierTypePredicate(targetTypePredicate)) {
                         if (reportErrors) {
                             errorReporter(ts.Diagnostics.Signature_0_must_be_a_type_predicate, signatureToString(source));
                         }
-                        return 0 /* False */;
+                        return 0;
                     }
                 }
                 else {
-                    // When relating callback signatures, we still need to relate return types bi-variantly as otherwise
-                    // the containing type wouldn't be co-variant. For example, interface Foo<T> { add(cb: () => T): void }
-                    // wouldn't be co-variant for T without this rule.
-                    result &= callbackCheck === 1 /* Bivariant */ && compareTypes(targetReturnType, sourceReturnType, /*reportErrors*/ false) ||
+                    result &= callbackCheck === 1 && compareTypes(targetReturnType, sourceReturnType, false) ||
                         compareTypes(sourceReturnType, targetReturnType, reportErrors);
                 }
             }
@@ -38332,9 +31713,9 @@ var ts;
                     errorReporter(ts.Diagnostics.A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard);
                     errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
                 }
-                return 0 /* False */;
+                return 0;
             }
-            if (source.kind === 1 /* Identifier */) {
+            if (source.kind === 1) {
                 var targetPredicate = target;
                 var sourceIndex = source.parameterIndex - (ts.getThisParameter(sourceDeclaration) ? 1 : 0);
                 var targetIndex = targetPredicate.parameterIndex - (ts.getThisParameter(targetDeclaration) ? 1 : 0);
@@ -38343,11 +31724,11 @@ var ts;
                         errorReporter(ts.Diagnostics.Parameter_0_is_not_in_the_same_position_as_parameter_1, source.parameterName, targetPredicate.parameterName);
                         errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
                     }
-                    return 0 /* False */;
+                    return 0;
                 }
             }
             var related = compareTypes(source.type, target.type, reportErrors);
-            if (related === 0 /* False */ && reportErrors) {
+            if (related === 0 && reportErrors) {
                 errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
             }
             return related;
@@ -38355,13 +31736,12 @@ var ts;
         function isImplementationCompatibleWithOverload(implementation, overload) {
             var erasedSource = getErasedSignature(implementation);
             var erasedTarget = getErasedSignature(overload);
-            // First see if the return types are compatible in either direction.
             var sourceReturnType = getReturnTypeOfSignature(erasedSource);
             var targetReturnType = getReturnTypeOfSignature(erasedTarget);
             if (targetReturnType === voidType
                 || isTypeRelatedTo(targetReturnType, sourceReturnType, assignableRelation)
                 || isTypeRelatedTo(sourceReturnType, targetReturnType, assignableRelation)) {
-                return isSignatureAssignableTo(erasedSource, erasedTarget, /*ignoreReturnTypes*/ true);
+                return isSignatureAssignableTo(erasedSource, erasedTarget, true);
             }
             return false;
         }
@@ -38374,8 +31754,6 @@ var ts;
         function getNumParametersToCheckForSignatureRelatability(source, sourceNonRestParamCount, target, targetNonRestParamCount) {
             if (source.hasRestParameter === target.hasRestParameter) {
                 if (source.hasRestParameter) {
-                    // If both have rest parameters, get the max and add 1 to
-                    // compensate for the rest parameter.
                     return Math.max(sourceNonRestParamCount, targetNonRestParamCount) + 1;
                 }
                 else {
@@ -38383,7 +31761,6 @@ var ts;
                 }
             }
             else {
-                // Return the count for whichever signature doesn't have rest parameters.
                 return source.hasRestParameter ?
                     targetNonRestParamCount :
                     sourceNonRestParamCount;
@@ -38397,10 +31774,10 @@ var ts;
                 !t.numberIndexInfo;
         }
         function isEmptyObjectType(type) {
-            return type.flags & 131072 /* Object */ ? isEmptyResolvedType(resolveStructuredTypeMembers(type)) :
-                type.flags & 16777216 /* NonPrimitive */ ? true :
-                    type.flags & 262144 /* Union */ ? ts.some(type.types, isEmptyObjectType) :
-                        type.flags & 524288 /* Intersection */ ? ts.every(type.types, isEmptyObjectType) :
+            return type.flags & 131072 ? isEmptyResolvedType(resolveStructuredTypeMembers(type)) :
+                type.flags & 16777216 ? true :
+                    type.flags & 262144 ? ts.some(type.types, isEmptyObjectType) :
+                        type.flags & 524288 ? ts.every(type.types, isEmptyObjectType) :
                             false;
         }
         function isEnumTypeRelatedTo(sourceSymbol, targetSymbol, errorReporter) {
@@ -38412,18 +31789,18 @@ var ts;
             if (relation !== undefined) {
                 return relation;
             }
-            if (sourceSymbol.escapedName !== targetSymbol.escapedName || !(sourceSymbol.flags & 256 /* RegularEnum */) || !(targetSymbol.flags & 256 /* RegularEnum */)) {
+            if (sourceSymbol.escapedName !== targetSymbol.escapedName || !(sourceSymbol.flags & 256) || !(targetSymbol.flags & 256)) {
                 enumRelation.set(id, false);
                 return false;
             }
             var targetEnumType = getTypeOfSymbol(targetSymbol);
             for (var _i = 0, _a = getPropertiesOfType(getTypeOfSymbol(sourceSymbol)); _i < _a.length; _i++) {
                 var property = _a[_i];
-                if (property.flags & 8 /* EnumMember */) {
+                if (property.flags & 8) {
                     var targetProperty = getPropertyOfType(targetEnumType, property.escapedName);
-                    if (!targetProperty || !(targetProperty.flags & 8 /* EnumMember */)) {
+                    if (!targetProperty || !(targetProperty.flags & 8)) {
                         if (errorReporter) {
-                            errorReporter(ts.Diagnostics.Property_0_is_missing_in_type_1, ts.symbolName(property), typeToString(getDeclaredTypeOfSymbol(targetSymbol), /*enclosingDeclaration*/ undefined, 64 /* UseFullyQualifiedType */));
+                            errorReporter(ts.Diagnostics.Property_0_is_missing_in_type_1, ts.symbolName(property), typeToString(getDeclaredTypeOfSymbol(targetSymbol), undefined, 64));
                         }
                         enumRelation.set(id, false);
                         return false;
@@ -38436,91 +31813,78 @@ var ts;
         function isSimpleTypeRelatedTo(source, target, relation, errorReporter) {
             var s = source.flags;
             var t = target.flags;
-            if (t & 3 /* AnyOrUnknown */ || s & 32768 /* Never */ || source === wildcardType)
+            if (t & 3 || s & 32768 || source === wildcardType)
                 return true;
-            if (t & 32768 /* Never */)
+            if (t & 32768)
                 return false;
-            if (s & 68 /* StringLike */ && t & 4 /* String */)
+            if (s & 68 && t & 4)
                 return true;
-            if (s & 64 /* StringLiteral */ && s & 512 /* EnumLiteral */ &&
-                t & 64 /* StringLiteral */ && !(t & 512 /* EnumLiteral */) &&
+            if (s & 64 && s & 512 &&
+                t & 64 && !(t & 512) &&
                 source.value === target.value)
                 return true;
-            if (s & 168 /* NumberLike */ && t & 8 /* Number */)
+            if (s & 168 && t & 8)
                 return true;
-            if (s & 128 /* NumberLiteral */ && s & 512 /* EnumLiteral */ &&
-                t & 128 /* NumberLiteral */ && !(t & 512 /* EnumLiteral */) &&
+            if (s & 128 && s & 512 &&
+                t & 128 && !(t & 512) &&
                 source.value === target.value)
                 return true;
-            if (s & 272 /* BooleanLike */ && t & 16 /* Boolean */)
+            if (s & 272 && t & 16)
                 return true;
-            if (s & 3072 /* ESSymbolLike */ && t & 1024 /* ESSymbol */)
+            if (s & 3072 && t & 1024)
                 return true;
-            if (s & 32 /* Enum */ && t & 32 /* Enum */ && isEnumTypeRelatedTo(source.symbol, target.symbol, errorReporter))
+            if (s & 32 && t & 32 && isEnumTypeRelatedTo(source.symbol, target.symbol, errorReporter))
                 return true;
-            if (s & 512 /* EnumLiteral */ && t & 512 /* EnumLiteral */) {
-                if (s & 262144 /* Union */ && t & 262144 /* Union */ && isEnumTypeRelatedTo(source.symbol, target.symbol, errorReporter))
+            if (s & 512 && t & 512) {
+                if (s & 262144 && t & 262144 && isEnumTypeRelatedTo(source.symbol, target.symbol, errorReporter))
                     return true;
-                if (s & 448 /* Literal */ && t & 448 /* Literal */ &&
+                if (s & 448 && t & 448 &&
                     source.value === target.value &&
                     isEnumTypeRelatedTo(getParentOfSymbol(source.symbol), getParentOfSymbol(target.symbol), errorReporter))
                     return true;
             }
-            if (s & 8192 /* Undefined */ && (!strictNullChecks || t & (8192 /* Undefined */ | 4096 /* Void */)))
+            if (s & 8192 && (!strictNullChecks || t & (8192 | 4096)))
                 return true;
-            if (s & 16384 /* Null */ && (!strictNullChecks || t & 16384 /* Null */))
+            if (s & 16384 && (!strictNullChecks || t & 16384))
                 return true;
-            if (s & 131072 /* Object */ && t & 16777216 /* NonPrimitive */)
+            if (s & 131072 && t & 16777216)
                 return true;
-            if (s & 2048 /* UniqueESSymbol */ || t & 2048 /* UniqueESSymbol */)
+            if (s & 2048 || t & 2048)
                 return false;
             if (relation === assignableRelation || relation === definitelyAssignableRelation || relation === comparableRelation) {
-                if (s & 1 /* Any */)
+                if (s & 1)
                     return true;
-                // Type number or any numeric literal type is assignable to any numeric enum type or any
-                // numeric enum literal type. This rule exists for backwards compatibility reasons because
-                // bit-flag enum types sometimes look like literal enum types with numeric literal values.
-                if (s & (8 /* Number */ | 128 /* NumberLiteral */) && !(s & 512 /* EnumLiteral */) && (t & 32 /* Enum */ || t & 128 /* NumberLiteral */ && t & 512 /* EnumLiteral */))
+                if (s & (8 | 128) && !(s & 512) && (t & 32 || t & 128 && t & 512))
                     return true;
             }
             return false;
         }
         function isTypeRelatedTo(source, target, relation) {
-            if (source.flags & 192 /* StringOrNumberLiteral */ && source.flags & 33554432 /* FreshLiteral */) {
+            if (source.flags & 192 && source.flags & 33554432) {
                 source = source.regularType;
             }
-            if (target.flags & 192 /* StringOrNumberLiteral */ && target.flags & 33554432 /* FreshLiteral */) {
+            if (target.flags & 192 && target.flags & 33554432) {
                 target = target.regularType;
             }
             if (source === target ||
-                relation === comparableRelation && !(target.flags & 32768 /* Never */) && isSimpleTypeRelatedTo(target, source, relation) ||
+                relation === comparableRelation && !(target.flags & 32768) && isSimpleTypeRelatedTo(target, source, relation) ||
                 relation !== identityRelation && isSimpleTypeRelatedTo(source, target, relation)) {
                 return true;
             }
-            if (source.flags & 131072 /* Object */ && target.flags & 131072 /* Object */) {
+            if (source.flags & 131072 && target.flags & 131072) {
                 var related = relation.get(getRelationKey(source, target, relation));
                 if (related !== undefined) {
-                    return related === 1 /* Succeeded */;
+                    return related === 1;
                 }
             }
-            if (source.flags & 16711680 /* StructuredOrInstantiable */ || target.flags & 16711680 /* StructuredOrInstantiable */) {
-                return checkTypeRelatedTo(source, target, relation, /*errorNode*/ undefined);
+            if (source.flags & 16711680 || target.flags & 16711680) {
+                return checkTypeRelatedTo(source, target, relation, undefined);
             }
             return false;
         }
         function isIgnoredJsxProperty(source, sourceProp, targetMemberType) {
-            return ts.getObjectFlags(source) & 4096 /* JsxAttributes */ && !(isUnhyphenatedJsxName(sourceProp.escapedName) || targetMemberType);
-        }
-        /**
-         * Checks if 'source' is related to 'target' (e.g.: is a assignable to).
-         * @param source The left-hand-side of the relation.
-         * @param target The right-hand-side of the relation.
-         * @param relation The relation considered. One of 'identityRelation', 'subtypeRelation', 'assignableRelation', or 'comparableRelation'.
-         * Used as both to determine which checks are performed and as a cache of previously computed results.
-         * @param errorNode The suggested node upon which all errors will be reported, if defined. This may or may not be the actual node used.
-         * @param headMessage If the error chain should be prepended by a head message, then headMessage will be used.
-         * @param containingMessageChain A chain of errors to prepend any new errors found.
-         */
+            return ts.getObjectFlags(source) & 4096 && !(isUnhyphenatedJsxName(sourceProp.escapedName) || targetMemberType);
+        }
         function checkTypeRelatedTo(source, target, relation, errorNode, headMessage, containingMessageChain) {
             var errorInfo;
             var maybeKeys;
@@ -38528,11 +31892,11 @@ var ts;
             var targetStack;
             var maybeCount = 0;
             var depth = 0;
-            var expandingFlags = 0 /* None */;
+            var expandingFlags = 0;
             var overflow = false;
             var isIntersectionConstituent = false;
             ts.Debug.assert(relation !== identityRelation || !errorNode, "no error reporting in identity checking");
-            var result = isRelatedTo(source, target, /*reportErrors*/ !!errorNode, headMessage);
+            var result = isRelatedTo(source, target, !!errorNode, headMessage);
             if (overflow) {
                 error(errorNode, ts.Diagnostics.Excessive_stack_depth_comparing_types_0_and_1, typeToString(source), typeToString(target));
             }
@@ -38543,20 +31907,18 @@ var ts;
                         errorInfo = ts.concatenateDiagnosticMessageChains(chain_1, errorInfo);
                     }
                 }
-                diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(errorNode, errorInfo)); // TODO: GH#18217
+                diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(errorNode, errorInfo));
             }
-            // Check if we should issue an extra diagnostic to produce a quickfix for a slightly incorrect import statement
             if (headMessage && errorNode && !result && source.symbol) {
                 var links = getSymbolLinks(source.symbol);
                 if (links.originatingImport && !ts.isImportCall(links.originatingImport)) {
-                    var helpfulRetry = checkTypeRelatedTo(getTypeOfSymbol(links.target), target, relation, /*errorNode*/ undefined);
+                    var helpfulRetry = checkTypeRelatedTo(getTypeOfSymbol(links.target), target, relation, undefined);
                     if (helpfulRetry) {
-                        // Likely an incorrect import. Issue a helpful diagnostic to produce a quickfix to change the import
                         diagnostics.add(ts.createDiagnosticForNode(links.originatingImport, ts.Diagnostics.A_namespace_style_import_cannot_be_called_or_constructed_and_will_cause_a_failure_at_runtime));
                     }
                 }
             }
-            return result !== 0 /* False */;
+            return result !== 0;
             function reportError(message, arg0, arg1, arg2) {
                 ts.Debug.assert(!!errorNode);
                 errorInfo = ts.chainDiagnosticMessages(errorInfo, message, arg0, arg1, arg2);
@@ -38565,8 +31927,8 @@ var ts;
                 var sourceType = typeToString(source);
                 var targetType = typeToString(target);
                 if (sourceType === targetType) {
-                    sourceType = typeToString(source, /*enclosingDeclaration*/ undefined, 64 /* UseFullyQualifiedType */);
-                    targetType = typeToString(target, /*enclosingDeclaration*/ undefined, 64 /* UseFullyQualifiedType */);
+                    sourceType = typeToString(source, undefined, 64);
+                    targetType = typeToString(target, undefined, 64);
                 }
                 if (!message) {
                     if (relation === comparableRelation) {
@@ -38587,20 +31949,18 @@ var ts;
                 if ((globalStringType === source && stringType === target) ||
                     (globalNumberType === source && numberType === target) ||
                     (globalBooleanType === source && booleanType === target) ||
-                    (getGlobalESSymbolType(/*reportErrors*/ false) === source && esSymbolType === target)) {
+                    (getGlobalESSymbolType(false) === source && esSymbolType === target)) {
                     reportError(ts.Diagnostics._0_is_a_primitive_but_1_is_a_wrapper_object_Prefer_using_0_when_possible, targetType, sourceType);
                 }
             }
             function isUnionOrIntersectionTypeWithoutNullableConstituents(type) {
-                if (!(type.flags & 786432 /* UnionOrIntersection */)) {
+                if (!(type.flags & 786432)) {
                     return false;
                 }
-                // at this point we know that this is union or intersection type possibly with nullable constituents.
-                // check if we still will have compound type if we ignore nullable components.
                 var seenNonNullable = false;
                 for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
                     var t = _a[_i];
-                    if (t.flags & 24576 /* Nullable */) {
+                    if (t.flags & 24576) {
                         continue;
                     }
                     if (seenNonNullable) {
@@ -38610,131 +31970,95 @@ var ts;
                 }
                 return false;
             }
-            /**
-             * Compare two types and return
-             * * Ternary.True if they are related with no assumptions,
-             * * Ternary.Maybe if they are related with assumptions of other relationships, or
-             * * Ternary.False if they are not related.
-             */
             function isRelatedTo(source, target, reportErrors, headMessage) {
                 if (reportErrors === void 0) { reportErrors = false; }
-                if (source.flags & 192 /* StringOrNumberLiteral */ && source.flags & 33554432 /* FreshLiteral */) {
+                if (source.flags & 192 && source.flags & 33554432) {
                     source = source.regularType;
                 }
-                if (target.flags & 192 /* StringOrNumberLiteral */ && target.flags & 33554432 /* FreshLiteral */) {
+                if (target.flags & 192 && target.flags & 33554432) {
                     target = target.regularType;
                 }
-                if (source.flags & 8388608 /* Substitution */) {
+                if (source.flags & 8388608) {
                     source = relation === definitelyAssignableRelation ? source.typeVariable : source.substitute;
                 }
-                if (target.flags & 8388608 /* Substitution */) {
+                if (target.flags & 8388608) {
                     target = target.typeVariable;
                 }
-                if (source.flags & 2097152 /* IndexedAccess */) {
+                if (source.flags & 2097152) {
                     source = getSimplifiedType(source);
                 }
-                if (target.flags & 2097152 /* IndexedAccess */) {
+                if (target.flags & 2097152) {
                     target = getSimplifiedType(target);
                 }
-                // both types are the same - covers 'they are the same primitive type or both are Any' or the same type parameter cases
                 if (source === target)
-                    return -1 /* True */;
+                    return -1;
                 if (relation === identityRelation) {
                     return isIdenticalTo(source, target);
                 }
-                if (relation === comparableRelation && !(target.flags & 32768 /* Never */) && isSimpleTypeRelatedTo(target, source, relation) ||
+                if (relation === comparableRelation && !(target.flags & 32768) && isSimpleTypeRelatedTo(target, source, relation) ||
                     isSimpleTypeRelatedTo(source, target, relation, reportErrors ? reportError : undefined))
-                    return -1 /* True */;
-                if (isObjectLiteralType(source) && source.flags & 33554432 /* FreshLiteral */) {
-                    var discriminantType = target.flags & 262144 /* Union */ ? findMatchingDiscriminantType(source, target) : undefined;
+                    return -1;
+                if (isObjectLiteralType(source) && source.flags & 33554432) {
+                    var discriminantType = target.flags & 262144 ? findMatchingDiscriminantType(source, target) : undefined;
                     if (hasExcessProperties(source, target, discriminantType, reportErrors)) {
                         if (reportErrors) {
                             reportRelationError(headMessage, source, target);
                         }
-                        return 0 /* False */;
+                        return 0;
                     }
-                    // Above we check for excess properties with respect to the entire target type. When union
-                    // and intersection types are further deconstructed on the target side, we don't want to
-                    // make the check again (as it might fail for a partial target type). Therefore we obtain
-                    // the regular source type and proceed with that.
                     if (isUnionOrIntersectionTypeWithoutNullableConstituents(target) && !discriminantType) {
                         source = getRegularTypeOfObjectLiteral(source);
                     }
                 }
                 if (relation !== comparableRelation &&
-                    !(source.flags & 786432 /* UnionOrIntersection */) &&
-                    !(target.flags & 262144 /* Union */) &&
+                    !(source.flags & 786432) &&
+                    !(target.flags & 262144) &&
                     !isIntersectionConstituent &&
                     source !== globalObjectType &&
                     (getPropertiesOfType(source).length > 0 || typeHasCallOrConstructSignatures(source)) &&
                     isWeakType(target) &&
                     !hasCommonProperties(source, target)) {
                     if (reportErrors) {
-                        var calls = getSignaturesOfType(source, 0 /* Call */);
-                        var constructs = getSignaturesOfType(source, 1 /* Construct */);
-                        if (calls.length > 0 && isRelatedTo(getReturnTypeOfSignature(calls[0]), target, /*reportErrors*/ false) ||
-                            constructs.length > 0 && isRelatedTo(getReturnTypeOfSignature(constructs[0]), target, /*reportErrors*/ false)) {
+                        var calls = getSignaturesOfType(source, 0);
+                        var constructs = getSignaturesOfType(source, 1);
+                        if (calls.length > 0 && isRelatedTo(getReturnTypeOfSignature(calls[0]), target, false) ||
+                            constructs.length > 0 && isRelatedTo(getReturnTypeOfSignature(constructs[0]), target, false)) {
                             reportError(ts.Diagnostics.Value_of_type_0_has_no_properties_in_common_with_type_1_Did_you_mean_to_call_it, typeToString(source), typeToString(target));
                         }
                         else {
                             reportError(ts.Diagnostics.Type_0_has_no_properties_in_common_with_type_1, typeToString(source), typeToString(target));
                         }
                     }
-                    return 0 /* False */;
+                    return 0;
                 }
-                var result = 0 /* False */;
+                var result = 0;
                 var saveErrorInfo = errorInfo;
                 var saveIsIntersectionConstituent = isIntersectionConstituent;
                 isIntersectionConstituent = false;
-                // Note that these checks are specifically ordered to produce correct results. In particular,
-                // we need to deconstruct unions before intersections (because unions are always at the top),
-                // and we need to handle "each" relations before "some" relations for the same kind of type.
-                if (source.flags & 262144 /* Union */) {
+                if (source.flags & 262144) {
                     result = relation === comparableRelation ?
-                        someTypeRelatedToType(source, target, reportErrors && !(source.flags & 32764 /* Primitive */)) :
-                        eachTypeRelatedToType(source, target, reportErrors && !(source.flags & 32764 /* Primitive */));
+                        someTypeRelatedToType(source, target, reportErrors && !(source.flags & 32764)) :
+                        eachTypeRelatedToType(source, target, reportErrors && !(source.flags & 32764));
                 }
                 else {
-                    if (target.flags & 262144 /* Union */) {
-                        result = typeRelatedToSomeType(source, target, reportErrors && !(source.flags & 32764 /* Primitive */) && !(target.flags & 32764 /* Primitive */));
+                    if (target.flags & 262144) {
+                        result = typeRelatedToSomeType(source, target, reportErrors && !(source.flags & 32764) && !(target.flags & 32764));
                     }
-                    else if (target.flags & 524288 /* Intersection */) {
+                    else if (target.flags & 524288) {
                         isIntersectionConstituent = true;
                         result = typeRelatedToEachType(source, target, reportErrors);
                     }
-                    else if (source.flags & 524288 /* Intersection */) {
-                        // Check to see if any constituents of the intersection are immediately related to the target.
-                        //
-                        // Don't report errors though. Checking whether a constituent is related to the source is not actually
-                        // useful and leads to some confusing error messages. Instead it is better to let the below checks
-                        // take care of this, or to not elaborate at all. For instance,
-                        //
-                        //    - For an object type (such as 'C = A & B'), users are usually more interested in structural errors.
-                        //
-                        //    - For a union type (such as '(A | B) = (C & D)'), it's better to hold onto the whole intersection
-                        //          than to report that 'D' is not assignable to 'A' or 'B'.
-                        //
-                        //    - For a primitive type or type parameter (such as 'number = A & B') there is no point in
-                        //          breaking the intersection apart.
-                        result = someTypeRelatedToType(source, target, /*reportErrors*/ false);
-                    }
-                    if (!result && (source.flags & 16711680 /* StructuredOrInstantiable */ || target.flags & 16711680 /* StructuredOrInstantiable */)) {
+                    else if (source.flags & 524288) {
+                        result = someTypeRelatedToType(source, target, false);
+                    }
+                    if (!result && (source.flags & 16711680 || target.flags & 16711680)) {
                         if (result = recursiveTypeRelatedTo(source, target, reportErrors)) {
                             errorInfo = saveErrorInfo;
                         }
                     }
                 }
-                if (!result && source.flags & 524288 /* Intersection */) {
-                    // The combined constraint of an intersection type is the intersection of the constraints of
-                    // the constituents. When an intersection type contains instantiable types with union type
-                    // constraints, there are situations where we need to examine the combined constraint. One is
-                    // when the target is a union type. Another is when the intersection contains types belonging
-                    // to one of the disjoint domains. For example, given type variables T and U, each with the
-                    // constraint 'string | number', the combined constraint of 'T & U' is 'string | number' and
-                    // we need to check this constraint against a union on the target side. Also, given a type
-                    // variable V constrained to 'string | number', 'V & number' has a combined constraint of
-                    // 'string & number | number & number' which reduces to just 'number'.
-                    var constraint = getUnionConstraintOfIntersection(source, !!(target.flags & 262144 /* Union */));
+                if (!result && source.flags & 524288) {
+                    var constraint = getUnionConstraintOfIntersection(source, !!(target.flags & 262144));
                     if (constraint) {
                         if (result = isRelatedTo(constraint, target, reportErrors)) {
                             errorInfo = saveErrorInfo;
@@ -38743,19 +32067,18 @@ var ts;
                 }
                 isIntersectionConstituent = saveIsIntersectionConstituent;
                 if (!result && reportErrors) {
-                    if (source.flags & 131072 /* Object */ && target.flags & 32764 /* Primitive */) {
+                    if (source.flags & 131072 && target.flags & 32764) {
                         tryElaborateErrorsForPrimitivesAndObjects(source, target);
                     }
-                    else if (source.symbol && source.flags & 131072 /* Object */ && globalObjectType === source) {
+                    else if (source.symbol && source.flags & 131072 && globalObjectType === source) {
                         reportError(ts.Diagnostics.The_Object_type_is_assignable_to_very_few_other_types_Did_you_mean_to_use_the_any_type_instead);
                     }
-                    else if (ts.getObjectFlags(source) & 4096 /* JsxAttributes */ && target.flags & 524288 /* Intersection */) {
+                    else if (ts.getObjectFlags(source) & 4096 && target.flags & 524288) {
                         var targetTypes = target.types;
                         var intrinsicAttributes = getJsxType(JsxNames.IntrinsicAttributes, errorNode);
                         var intrinsicClassAttributes = getJsxType(JsxNames.IntrinsicClassAttributes, errorNode);
                         if (intrinsicAttributes !== errorType && intrinsicClassAttributes !== errorType &&
                             (ts.contains(targetTypes, intrinsicAttributes) || ts.contains(targetTypes, intrinsicClassAttributes))) {
-                            // do not report top error
                             return result;
                         }
                     }
@@ -38766,32 +32089,32 @@ var ts;
             function isIdenticalTo(source, target) {
                 var result;
                 var flags = source.flags & target.flags;
-                if (flags & 131072 /* Object */) {
-                    return recursiveTypeRelatedTo(source, target, /*reportErrors*/ false);
+                if (flags & 131072) {
+                    return recursiveTypeRelatedTo(source, target, false);
                 }
-                if (flags & (262144 /* Union */ | 524288 /* Intersection */)) {
+                if (flags & (262144 | 524288)) {
                     if (result = eachTypeRelatedToSomeType(source, target)) {
                         if (result &= eachTypeRelatedToSomeType(target, source)) {
                             return result;
                         }
                     }
                 }
-                if (flags & 1048576 /* Index */) {
-                    return isRelatedTo(source.type, target.type, /*reportErrors*/ false);
+                if (flags & 1048576) {
+                    return isRelatedTo(source.type, target.type, false);
                 }
-                if (flags & 2097152 /* IndexedAccess */) {
-                    if (result = isRelatedTo(source.objectType, target.objectType, /*reportErrors*/ false)) {
-                        if (result &= isRelatedTo(source.indexType, target.indexType, /*reportErrors*/ false)) {
+                if (flags & 2097152) {
+                    if (result = isRelatedTo(source.objectType, target.objectType, false)) {
+                        if (result &= isRelatedTo(source.indexType, target.indexType, false)) {
                             return result;
                         }
                     }
                 }
-                if (flags & 4194304 /* Conditional */) {
+                if (flags & 4194304) {
                     if (source.root.isDistributive === target.root.isDistributive) {
-                        if (result = isRelatedTo(source.checkType, target.checkType, /*reportErrors*/ false)) {
-                            if (result &= isRelatedTo(source.extendsType, target.extendsType, /*reportErrors*/ false)) {
-                                if (result &= isRelatedTo(getTrueTypeFromConditionalType(source), getTrueTypeFromConditionalType(target), /*reportErrors*/ false)) {
-                                    if (result &= isRelatedTo(getFalseTypeFromConditionalType(source), getFalseTypeFromConditionalType(target), /*reportErrors*/ false)) {
+                        if (result = isRelatedTo(source.checkType, target.checkType, false)) {
+                            if (result &= isRelatedTo(source.extendsType, target.extendsType, false)) {
+                                if (result &= isRelatedTo(getTrueTypeFromConditionalType(source), getTrueTypeFromConditionalType(target), false)) {
+                                    if (result &= isRelatedTo(getFalseTypeFromConditionalType(source), getFalseTypeFromConditionalType(target), false)) {
                                         return result;
                                     }
                                 }
@@ -38799,37 +32122,30 @@ var ts;
                         }
                     }
                 }
-                if (flags & 8388608 /* Substitution */) {
-                    return isRelatedTo(source.substitute, target.substitute, /*reportErrors*/ false);
+                if (flags & 8388608) {
+                    return isRelatedTo(source.substitute, target.substitute, false);
                 }
-                return 0 /* False */;
+                return 0;
             }
             function hasExcessProperties(source, target, discriminant, reportErrors) {
-                if (maybeTypeOfKind(target, 131072 /* Object */) && !(ts.getObjectFlags(target) & 512 /* ObjectLiteralPatternWithComputedProperties */)) {
-                    var isComparingJsxAttributes = !!(ts.getObjectFlags(source) & 4096 /* JsxAttributes */);
+                if (maybeTypeOfKind(target, 131072) && !(ts.getObjectFlags(target) & 512)) {
+                    var isComparingJsxAttributes = !!(ts.getObjectFlags(source) & 4096);
                     if ((relation === assignableRelation || relation === definitelyAssignableRelation || relation === comparableRelation) &&
                         (isTypeSubsetOf(globalObjectType, target) || (!isComparingJsxAttributes && isEmptyObjectType(target)))) {
                         return false;
                     }
                     if (discriminant) {
-                        // check excess properties against discriminant type only, not the entire union
-                        return hasExcessProperties(source, discriminant, /*discriminant*/ undefined, reportErrors);
+                        return hasExcessProperties(source, discriminant, undefined, reportErrors);
                     }
-                    var _loop_4 = function (prop) {
+                    var _loop_7 = function (prop) {
                         if (!isKnownProperty(target, prop.escapedName, isComparingJsxAttributes)) {
                             if (reportErrors) {
-                                // We know *exactly* where things went wrong when comparing the types.
-                                // Use this property as the error node as this will be more helpful in
-                                // reasoning about what went wrong.
                                 if (!errorNode)
                                     return { value: ts.Debug.fail() };
                                 if (ts.isJsxAttributes(errorNode) || ts.isJsxOpeningLikeElement(errorNode)) {
-                                    // JsxAttributes has an object-literal flag and undergo same type-assignablity check as normal object-literal.
-                                    // However, using an object-literal error message will be very confusing to the users so we give different a message.
                                     reportError(ts.Diagnostics.Property_0_does_not_exist_on_type_1, symbolToString(prop), typeToString(target));
                                 }
                                 else {
-                                    // use the property's value declaration if the property is assigned inside the literal itself
                                     var objectLiteralDeclaration_1 = source.symbol && ts.firstOrUndefined(source.symbol.declarations);
                                     var suggestion = void 0;
                                     if (prop.valueDeclaration && ts.findAncestor(prop.valueDeclaration, function (d) { return d === objectLiteralDeclaration_1; })) {
@@ -38854,7 +32170,7 @@ var ts;
                     };
                     for (var _i = 0, _a = getPropertiesOfObjectType(source); _i < _a.length; _i++) {
                         var prop = _a[_i];
-                        var state_3 = _loop_4(prop);
+                        var state_3 = _loop_7(prop);
                         if (typeof state_3 === "object")
                             return state_3.value;
                     }
@@ -38862,13 +32178,13 @@ var ts;
                 return false;
             }
             function eachTypeRelatedToSomeType(source, target) {
-                var result = -1 /* True */;
+                var result = -1;
                 var sourceTypes = source.types;
                 for (var _i = 0, sourceTypes_1 = sourceTypes; _i < sourceTypes_1.length; _i++) {
                     var sourceType = sourceTypes_1[_i];
-                    var related = typeRelatedToSomeType(sourceType, target, /*reportErrors*/ false);
+                    var related = typeRelatedToSomeType(sourceType, target, false);
                     if (!related) {
-                        return 0 /* False */;
+                        return 0;
                     }
                     result &= related;
                 }
@@ -38876,23 +32192,22 @@ var ts;
             }
             function typeRelatedToSomeType(source, target, reportErrors) {
                 var targetTypes = target.types;
-                if (target.flags & 262144 /* Union */ && containsType(targetTypes, source)) {
-                    return -1 /* True */;
+                if (target.flags & 262144 && containsType(targetTypes, source)) {
+                    return -1;
                 }
                 for (var _i = 0, targetTypes_1 = targetTypes; _i < targetTypes_1.length; _i++) {
                     var type = targetTypes_1[_i];
-                    var related = isRelatedTo(source, type, /*reportErrors*/ false);
+                    var related = isRelatedTo(source, type, false);
                     if (related) {
                         return related;
                     }
                 }
                 if (reportErrors) {
                     var discriminantType = findMatchingDiscriminantType(source, target);
-                    isRelatedTo(source, discriminantType || targetTypes[targetTypes.length - 1], /*reportErrors*/ true);
+                    isRelatedTo(source, discriminantType || targetTypes[targetTypes.length - 1], true);
                 }
-                return 0 /* False */;
+                return 0;
             }
-            // Keep this up-to-date with the same logic within `getApparentTypeOfContextualType`, since they should behave similarly
             function findMatchingDiscriminantType(source, target) {
                 var match;
                 var sourceProperties = getPropertiesOfObjectType(source);
@@ -38907,7 +32222,7 @@ var ts;
                                 var targetType = getTypeOfPropertyOfType(type, sourceProperty.escapedName);
                                 if (targetType && isRelatedTo(sourceType, targetType)) {
                                     if (type === match)
-                                        continue; // Finding multiple fields which discriminate to the same type is fine
+                                        continue;
                                     if (match) {
                                         return undefined;
                                     }
@@ -38920,13 +32235,13 @@ var ts;
                 return match;
             }
             function typeRelatedToEachType(source, target, reportErrors) {
-                var result = -1 /* True */;
+                var result = -1;
                 var targetTypes = target.types;
                 for (var _i = 0, targetTypes_2 = targetTypes; _i < targetTypes_2.length; _i++) {
                     var targetType = targetTypes_2[_i];
                     var related = isRelatedTo(source, targetType, reportErrors);
                     if (!related) {
-                        return 0 /* False */;
+                        return 0;
                     }
                     result &= related;
                 }
@@ -38934,8 +32249,8 @@ var ts;
             }
             function someTypeRelatedToType(source, target, reportErrors) {
                 var sourceTypes = source.types;
-                if (source.flags & 262144 /* Union */ && containsType(sourceTypes, target)) {
-                    return -1 /* True */;
+                if (source.flags & 262144 && containsType(sourceTypes, target)) {
+                    return -1;
                 }
                 var len = sourceTypes.length;
                 for (var i = 0; i < len; i++) {
@@ -38944,16 +32259,16 @@ var ts;
                         return related;
                     }
                 }
-                return 0 /* False */;
+                return 0;
             }
             function eachTypeRelatedToType(source, target, reportErrors) {
-                var result = -1 /* True */;
+                var result = -1;
                 var sourceTypes = source.types;
                 for (var _i = 0, sourceTypes_2 = sourceTypes; _i < sourceTypes_2.length; _i++) {
                     var sourceType = sourceTypes_2[_i];
                     var related = isRelatedTo(sourceType, target, reportErrors);
                     if (!related) {
-                        return 0 /* False */;
+                        return 0;
                     }
                     result &= related;
                 }
@@ -38963,72 +32278,54 @@ var ts;
                 var sources = source.typeArguments || ts.emptyArray;
                 var targets = target.typeArguments || ts.emptyArray;
                 if (sources.length !== targets.length && relation === identityRelation) {
-                    return 0 /* False */;
+                    return 0;
                 }
                 var length = sources.length <= targets.length ? sources.length : targets.length;
-                var result = -1 /* True */;
+                var result = -1;
                 for (var i = 0; i < length; i++) {
-                    // When variance information isn't available we default to covariance. This happens
-                    // in the process of computing variance information for recursive types and when
-                    // comparing 'this' type arguments.
-                    var variance = i < variances.length ? variances[i] : 1 /* Covariant */;
-                    // We ignore arguments for independent type parameters (because they're never witnessed).
-                    if (variance !== 4 /* Independent */) {
+                    var variance = i < variances.length ? variances[i] : 1;
+                    if (variance !== 4) {
                         var s = sources[i];
                         var t = targets[i];
-                        var related = -1 /* True */;
-                        if (variance === 1 /* Covariant */) {
+                        var related = -1;
+                        if (variance === 1) {
                             related = isRelatedTo(s, t, reportErrors);
                         }
-                        else if (variance === 2 /* Contravariant */) {
+                        else if (variance === 2) {
                             related = isRelatedTo(t, s, reportErrors);
                         }
-                        else if (variance === 3 /* Bivariant */) {
-                            // In the bivariant case we first compare contravariantly without reporting
-                            // errors. Then, if that doesn't succeed, we compare covariantly with error
-                            // reporting. Thus, error elaboration will be based on the the covariant check,
-                            // which is generally easier to reason about.
-                            related = isRelatedTo(t, s, /*reportErrors*/ false);
+                        else if (variance === 3) {
+                            related = isRelatedTo(t, s, false);
                             if (!related) {
                                 related = isRelatedTo(s, t, reportErrors);
                             }
                         }
                         else {
-                            // In the invariant case we first compare covariantly, and only when that
-                            // succeeds do we proceed to compare contravariantly. Thus, error elaboration
-                            // will typically be based on the covariant check.
                             related = isRelatedTo(s, t, reportErrors);
                             if (related) {
                                 related &= isRelatedTo(t, s, reportErrors);
                             }
                         }
                         if (!related) {
-                            return 0 /* False */;
+                            return 0;
                         }
                         result &= related;
                     }
                 }
                 return result;
             }
-            // Determine if possibly recursive types are related. First, check if the result is already available in the global cache.
-            // Second, check if we have already started a comparison of the given two types in which case we assume the result to be true.
-            // Third, check if both types are part of deeply nested chains of generic type instantiations and if so assume the types are
-            // equal and infinitely expanding. Fourth, if we have reached a depth of 100 nested comparisons, assume we have runaway recursion
-            // and issue an error. Otherwise, actually compare the structure of the two types.
             function recursiveTypeRelatedTo(source, target, reportErrors) {
                 if (overflow) {
-                    return 0 /* False */;
+                    return 0;
                 }
                 var id = getRelationKey(source, target, relation);
                 var related = relation.get(id);
                 if (related !== undefined) {
-                    if (reportErrors && related === 2 /* Failed */) {
-                        // We are elaborating errors and the cached result is an unreported failure. Record the result as a reported
-                        // failure and continue computing the relation such that errors get reported.
-                        relation.set(id, 3 /* FailedAndReported */);
+                    if (reportErrors && related === 2) {
+                        relation.set(id, 3);
                     }
                     else {
-                        return related === 1 /* Succeeded */ ? -1 /* True */ : 0 /* False */;
+                        return related === 1 ? -1 : 0;
                     }
                 }
                 if (!maybeKeys) {
@@ -39038,14 +32335,13 @@ var ts;
                 }
                 else {
                     for (var i = 0; i < maybeCount; i++) {
-                        // If source and target are already being compared, consider them related with assumptions
                         if (id === maybeKeys[i]) {
-                            return 1 /* Maybe */;
+                            return 1;
                         }
                     }
                     if (depth === 100) {
                         overflow = true;
-                        return 0 /* False */;
+                        return 0;
                     }
                 }
                 var maybeStart = maybeCount;
@@ -39055,26 +32351,23 @@ var ts;
                 targetStack[depth] = target;
                 depth++;
                 var saveExpandingFlags = expandingFlags;
-                if (!(expandingFlags & 1 /* Source */) && isDeeplyNestedType(source, sourceStack, depth))
-                    expandingFlags |= 1 /* Source */;
-                if (!(expandingFlags & 2 /* Target */) && isDeeplyNestedType(target, targetStack, depth))
-                    expandingFlags |= 2 /* Target */;
-                var result = expandingFlags !== 3 /* Both */ ? structuredTypeRelatedTo(source, target, reportErrors) : 1 /* Maybe */;
+                if (!(expandingFlags & 1) && isDeeplyNestedType(source, sourceStack, depth))
+                    expandingFlags |= 1;
+                if (!(expandingFlags & 2) && isDeeplyNestedType(target, targetStack, depth))
+                    expandingFlags |= 2;
+                var result = expandingFlags !== 3 ? structuredTypeRelatedTo(source, target, reportErrors) : 1;
                 expandingFlags = saveExpandingFlags;
                 depth--;
                 if (result) {
-                    if (result === -1 /* True */ || depth === 0) {
-                        // If result is definitely true, record all maybe keys as having succeeded
+                    if (result === -1 || depth === 0) {
                         for (var i = maybeStart; i < maybeCount; i++) {
-                            relation.set(maybeKeys[i], 1 /* Succeeded */);
+                            relation.set(maybeKeys[i], 1);
                         }
                         maybeCount = maybeStart;
                     }
                 }
                 else {
-                    // A false result goes straight into global cache (when something is false under
-                    // assumptions it will also be false without assumptions)
-                    relation.set(id, reportErrors ? 3 /* FailedAndReported */ : 2 /* Failed */);
+                    relation.set(id, reportErrors ? 3 : 2);
                     maybeCount = maybeStart;
                 }
                 return result;
@@ -39086,10 +32379,9 @@ var ts;
                 var result;
                 var originalErrorInfo;
                 var saveErrorInfo = errorInfo;
-                if (target.flags & 65536 /* TypeParameter */) {
-                    // A source type { [P in keyof T]: X } is related to a target type T if X is related to T[P].
-                    if (ts.getObjectFlags(source) & 32 /* Mapped */ && getConstraintTypeFromMappedType(source) === getIndexType(target)) {
-                        if (!(getMappedTypeModifiers(source) & 4 /* IncludeOptional */)) {
+                if (target.flags & 65536) {
+                    if (ts.getObjectFlags(source) & 32 && getConstraintTypeFromMappedType(source) === getIndexType(target)) {
+                        if (!(getMappedTypeModifiers(source) & 4)) {
                             var templateType = getTemplateTypeFromMappedType(source);
                             var indexedAccessType = getIndexedAccessType(target, getTypeParameterFromMappedType(source));
                             if (result = isRelatedTo(templateType, indexedAccessType, reportErrors)) {
@@ -39098,15 +32390,12 @@ var ts;
                         }
                     }
                 }
-                else if (target.flags & 1048576 /* Index */) {
-                    // A keyof S is related to a keyof T if T is related to S.
-                    if (source.flags & 1048576 /* Index */) {
-                        if (result = isRelatedTo(target.type, source.type, /*reportErrors*/ false)) {
+                else if (target.flags & 1048576) {
+                    if (source.flags & 1048576) {
+                        if (result = isRelatedTo(target.type, source.type, false)) {
                             return result;
                         }
                     }
-                    // A type S is assignable to keyof T if S is assignable to keyof C, where C is the
-                    // simplified form of T or, if T doesn't simplify, the constraint of T.
                     if (relation !== definitelyAssignableRelation) {
                         var simplified = getSimplifiedType(target.type);
                         var constraint = simplified !== target.type ? simplified : getConstraintOfType(target.type);
@@ -39117,9 +32406,7 @@ var ts;
                         }
                     }
                 }
-                else if (target.flags & 2097152 /* IndexedAccess */) {
-                    // A type S is related to a type T[K] if S is related to C, where C is the
-                    // constraint of T[K]
+                else if (target.flags & 2097152) {
                     var constraint = getConstraintForRelation(target);
                     if (constraint) {
                         if (result = isRelatedTo(source, constraint, reportErrors)) {
@@ -39129,15 +32416,13 @@ var ts;
                     }
                 }
                 else if (isGenericMappedType(target)) {
-                    // A source type T is related to a target type { [P in X]: T[P] }
                     var template = getTemplateTypeFromMappedType(target);
                     var modifiers = getMappedTypeModifiers(target);
-                    if (!(modifiers & 8 /* ExcludeOptional */)) {
-                        if (template.flags & 2097152 /* IndexedAccess */ && template.objectType === source &&
+                    if (!(modifiers & 8)) {
+                        if (template.flags & 2097152 && template.objectType === source &&
                             template.indexType === getTypeParameterFromMappedType(target)) {
-                            return -1 /* True */;
+                            return -1;
                         }
-                        // A source type T is related to a target type { [P in keyof T]: X } if T[P] is related to X.
                         if (!isGenericMappedType(source) && getConstraintTypeFromMappedType(target) === getIndexType(source)) {
                             var indexedAccessType = getIndexedAccessType(source, getTypeParameterFromMappedType(target));
                             var templateType = getTemplateTypeFromMappedType(target);
@@ -39148,9 +32433,8 @@ var ts;
                         }
                     }
                 }
-                if (source.flags & 2162688 /* TypeVariable */) {
-                    if (source.flags & 2097152 /* IndexedAccess */ && target.flags & 2097152 /* IndexedAccess */) {
-                        // A type S[K] is related to a type T[J] if S is related to T and K is related to J.
+                if (source.flags & 2162688) {
+                    if (source.flags & 2097152 && target.flags & 2097152) {
                         if (result = isRelatedTo(source.objectType, target.objectType, reportErrors)) {
                             result &= isRelatedTo(source.indexType, target.indexType, reportErrors);
                         }
@@ -39160,9 +32444,8 @@ var ts;
                         }
                     }
                     var constraint = getConstraintForRelation(source);
-                    if (!constraint || (source.flags & 65536 /* TypeParameter */ && constraint.flags & 3 /* AnyOrUnknown */)) {
-                        // A type variable with no constraint is not related to the non-primitive object type.
-                        if (result = isRelatedTo(emptyObjectType, extractTypesOfKind(target, ~16777216 /* NonPrimitive */))) {
+                    if (!constraint || (source.flags & 65536 && constraint.flags & 3)) {
+                        if (result = isRelatedTo(emptyObjectType, extractTypesOfKind(target, ~16777216))) {
                             errorInfo = saveErrorInfo;
                             return result;
                         }
@@ -39175,17 +32458,14 @@ var ts;
                         }
                     }
                 }
-                else if (source.flags & 1048576 /* Index */) {
+                else if (source.flags & 1048576) {
                     if (result = isRelatedTo(keyofConstraintType, target, reportErrors)) {
                         errorInfo = saveErrorInfo;
                         return result;
                     }
                 }
-                else if (source.flags & 4194304 /* Conditional */) {
-                    if (target.flags & 4194304 /* Conditional */) {
-                        // Two conditional types 'T1 extends U1 ? X1 : Y1' and 'T2 extends U2 ? X2 : Y2' are related if
-                        // one of T1 and T2 is related to the other, U1 and U2 are identical types, X1 is related to X2,
-                        // and Y1 is related to Y2.
+                else if (source.flags & 4194304) {
+                    if (target.flags & 4194304) {
                         if (isTypeIdenticalTo(source.extendsType, target.extendsType) &&
                             (isRelatedTo(source.checkType, target.checkType) || isRelatedTo(target.checkType, source.checkType))) {
                             if (result = isRelatedTo(getTrueTypeFromConditionalType(source), getTrueTypeFromConditionalType(target), reportErrors)) {
@@ -39215,68 +32495,42 @@ var ts;
                     }
                 }
                 else {
-                    if (ts.getObjectFlags(source) & 4 /* Reference */ && ts.getObjectFlags(target) & 4 /* Reference */ && source.target === target.target &&
-                        !(ts.getObjectFlags(source) & 8192 /* MarkerType */ || ts.getObjectFlags(target) & 8192 /* MarkerType */)) {
-                        // We have type references to the same generic type, and the type references are not marker
-                        // type references (which are intended by be compared structurally). Obtain the variance
-                        // information for the type parameters and relate the type arguments accordingly.
+                    if (ts.getObjectFlags(source) & 4 && ts.getObjectFlags(target) & 4 && source.target === target.target &&
+                        !(ts.getObjectFlags(source) & 8192 || ts.getObjectFlags(target) & 8192)) {
                         var variances = getVariances(source.target);
                         if (result = typeArgumentsRelatedTo(source, target, variances, reportErrors)) {
                             return result;
                         }
-                        // The type arguments did not relate appropriately, but it may be because we have no variance
-                        // information (in which case typeArgumentsRelatedTo defaulted to covariance for all type
-                        // arguments). It might also be the case that the target type has a 'void' type argument for
-                        // a covariant type parameter that is only used in return positions within the generic type
-                        // (in which case any type argument is permitted on the source side). In those cases we proceed
-                        // with a structural comparison. Otherwise, we know for certain the instantiations aren't
-                        // related and we can return here.
                         if (variances !== ts.emptyArray && !hasCovariantVoidArgument(target, variances)) {
-                            // In some cases generic types that are covariant in regular type checking mode become
-                            // invariant in --strictFunctionTypes mode because one or more type parameters are used in
-                            // both co- and contravariant positions. In order to make it easier to diagnose *why* such
-                            // types are invariant, if any of the type parameters are invariant we reset the reported
-                            // errors and instead force a structural comparison (which will include elaborations that
-                            // reveal the reason).
-                            if (!(reportErrors && ts.some(variances, function (v) { return v === 0 /* Invariant */; }))) {
-                                return 0 /* False */;
+                            if (!(reportErrors && ts.some(variances, function (v) { return v === 0; }))) {
+                                return 0;
                             }
-                            // We remember the original error information so we can restore it in case the structural
-                            // comparison unexpectedly succeeds. This can happen when the structural comparison result
-                            // is a Ternary.Maybe for example caused by the recursion depth limiter.
                             originalErrorInfo = errorInfo;
                             errorInfo = saveErrorInfo;
                         }
                     }
-                    // Even if relationship doesn't hold for unions, intersections, or generic type references,
-                    // it may hold in a structural comparison.
-                    var sourceIsPrimitive = !!(source.flags & 32764 /* Primitive */);
+                    var sourceIsPrimitive = !!(source.flags & 32764);
                     if (relation !== identityRelation) {
                         source = getApparentType(source);
                     }
-                    // In a check of the form X = A & B, we will have previously checked if A relates to X or B relates
-                    // to X. Failing both of those we want to check if the aggregation of A and B's members structurally
-                    // relates to X. Thus, we include intersection types on the source side here.
-                    if (source.flags & (131072 /* Object */ | 524288 /* Intersection */) && target.flags & 131072 /* Object */) {
-                        // Report structural errors only if we haven't reported any errors yet
+                    if (source.flags & (131072 | 524288) && target.flags & 131072) {
                         var reportStructuralErrors = reportErrors && errorInfo === saveErrorInfo && !sourceIsPrimitive;
-                        // An empty object type is related to any mapped type that includes a '?' modifier.
                         if (isPartialMappedType(target) && !isGenericMappedType(source) && isEmptyObjectType(source)) {
-                            result = -1 /* True */;
+                            result = -1;
                         }
                         else if (isGenericMappedType(target)) {
-                            result = isGenericMappedType(source) ? mappedTypeRelatedTo(source, target, reportStructuralErrors) : 0 /* False */;
+                            result = isGenericMappedType(source) ? mappedTypeRelatedTo(source, target, reportStructuralErrors) : 0;
                         }
                         else {
                             result = propertiesRelatedTo(source, target, reportStructuralErrors);
                             if (result) {
-                                result &= signaturesRelatedTo(source, target, 0 /* Call */, reportStructuralErrors);
+                                result &= signaturesRelatedTo(source, target, 0, reportStructuralErrors);
                                 if (result) {
-                                    result &= signaturesRelatedTo(source, target, 1 /* Construct */, reportStructuralErrors);
+                                    result &= signaturesRelatedTo(source, target, 1, reportStructuralErrors);
                                     if (result) {
-                                        result &= indexTypesRelatedTo(source, target, 0 /* String */, sourceIsPrimitive, reportStructuralErrors);
+                                        result &= indexTypesRelatedTo(source, target, 0, sourceIsPrimitive, reportStructuralErrors);
                                         if (result) {
-                                            result &= indexTypesRelatedTo(source, target, 1 /* Number */, sourceIsPrimitive, reportStructuralErrors);
+                                            result &= indexTypesRelatedTo(source, target, 1, sourceIsPrimitive, reportStructuralErrors);
                                         }
                                     }
                                 }
@@ -39291,22 +32545,19 @@ var ts;
                         }
                     }
                 }
-                return 0 /* False */;
+                return 0;
             }
-            // A type [P in S]: X is related to a type [Q in T]: Y if T is related to S and X' is
-            // related to Y, where X' is an instantiation of X in which P is replaced with Q. Notice
-            // that S and T are contra-variant whereas X and Y are co-variant.
             function mappedTypeRelatedTo(source, target, reportErrors) {
                 var modifiersRelated = relation === comparableRelation || (relation === identityRelation ? getMappedTypeModifiers(source) === getMappedTypeModifiers(target) :
                     getCombinedMappedTypeOptionality(source) <= getCombinedMappedTypeOptionality(target));
                 if (modifiersRelated) {
-                    var result_1;
-                    if (result_1 = isRelatedTo(getConstraintTypeFromMappedType(target), getConstraintTypeFromMappedType(source), reportErrors)) {
+                    var result_2;
+                    if (result_2 = isRelatedTo(getConstraintTypeFromMappedType(target), getConstraintTypeFromMappedType(source), reportErrors)) {
                         var mapper = createTypeMapper([getTypeParameterFromMappedType(source)], [getTypeParameterFromMappedType(target)]);
-                        return result_1 & isRelatedTo(instantiateType(getTemplateTypeFromMappedType(source), mapper), getTemplateTypeFromMappedType(target), reportErrors);
+                        return result_2 & isRelatedTo(instantiateType(getTemplateTypeFromMappedType(source), mapper), getTemplateTypeFromMappedType(target), reportErrors);
                     }
                 }
-                return 0 /* False */;
+                return 0;
             }
             function propertiesRelatedTo(source, target, reportErrors) {
                 if (relation === identityRelation) {
@@ -39318,7 +32569,7 @@ var ts;
                     if (reportErrors) {
                         reportError(ts.Diagnostics.Property_0_is_missing_in_type_1, symbolToString(unmatchedProperty), typeToString(source));
                     }
-                    return 0 /* False */;
+                    return 0;
                 }
                 if (isObjectLiteralType(target)) {
                     for (var _i = 0, _a = getPropertiesOfType(source); _i < _a.length; _i++) {
@@ -39329,16 +32580,16 @@ var ts;
                                 if (reportErrors) {
                                     reportError(ts.Diagnostics.Property_0_does_not_exist_on_type_1, symbolToString(sourceProp), typeToString(target));
                                 }
-                                return 0 /* False */;
+                                return 0;
                             }
                         }
                     }
                 }
-                var result = -1 /* True */;
+                var result = -1;
                 var properties = getPropertiesOfObjectType(target);
                 for (var _b = 0, properties_3 = properties; _b < properties_3.length; _b++) {
                     var targetProp = properties_3[_b];
-                    if (!(targetProp.flags & 4194304 /* Prototype */)) {
+                    if (!(targetProp.flags & 4194304)) {
                         var sourceProp = getPropertyOfType(source, targetProp.escapedName);
                         if (sourceProp && sourceProp !== targetProp) {
                             if (isIgnoredJsxProperty(source, sourceProp, getTypeOfSymbol(targetProp))) {
@@ -39346,86 +32597,74 @@ var ts;
                             }
                             var sourcePropFlags = ts.getDeclarationModifierFlagsFromSymbol(sourceProp);
                             var targetPropFlags = ts.getDeclarationModifierFlagsFromSymbol(targetProp);
-                            if (sourcePropFlags & 8 /* Private */ || targetPropFlags & 8 /* Private */) {
+                            if (sourcePropFlags & 8 || targetPropFlags & 8) {
                                 var hasDifferingDeclarations = sourceProp.valueDeclaration !== targetProp.valueDeclaration;
-                                if (ts.getCheckFlags(sourceProp) & 256 /* ContainsPrivate */ && hasDifferingDeclarations) {
+                                if (ts.getCheckFlags(sourceProp) & 256 && hasDifferingDeclarations) {
                                     if (reportErrors) {
                                         reportError(ts.Diagnostics.Property_0_has_conflicting_declarations_and_is_inaccessible_in_type_1, symbolToString(sourceProp), typeToString(source));
                                     }
-                                    return 0 /* False */;
+                                    return 0;
                                 }
                                 if (hasDifferingDeclarations) {
                                     if (reportErrors) {
-                                        if (sourcePropFlags & 8 /* Private */ && targetPropFlags & 8 /* Private */) {
+                                        if (sourcePropFlags & 8 && targetPropFlags & 8) {
                                             reportError(ts.Diagnostics.Types_have_separate_declarations_of_a_private_property_0, symbolToString(targetProp));
                                         }
                                         else {
-                                            reportError(ts.Diagnostics.Property_0_is_private_in_type_1_but_not_in_type_2, symbolToString(targetProp), typeToString(sourcePropFlags & 8 /* Private */ ? source : target), typeToString(sourcePropFlags & 8 /* Private */ ? target : source));
+                                            reportError(ts.Diagnostics.Property_0_is_private_in_type_1_but_not_in_type_2, symbolToString(targetProp), typeToString(sourcePropFlags & 8 ? source : target), typeToString(sourcePropFlags & 8 ? target : source));
                                         }
                                     }
-                                    return 0 /* False */;
+                                    return 0;
                                 }
                             }
-                            else if (targetPropFlags & 16 /* Protected */) {
+                            else if (targetPropFlags & 16) {
                                 if (!isValidOverrideOf(sourceProp, targetProp)) {
                                     if (reportErrors) {
                                         reportError(ts.Diagnostics.Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2, symbolToString(targetProp), typeToString(getDeclaringClass(sourceProp) || source), typeToString(getDeclaringClass(targetProp) || target));
                                     }
-                                    return 0 /* False */;
+                                    return 0;
                                 }
                             }
-                            else if (sourcePropFlags & 16 /* Protected */) {
+                            else if (sourcePropFlags & 16) {
                                 if (reportErrors) {
                                     reportError(ts.Diagnostics.Property_0_is_protected_in_type_1_but_public_in_type_2, symbolToString(targetProp), typeToString(source), typeToString(target));
                                 }
-                                return 0 /* False */;
+                                return 0;
                             }
                             var related = isRelatedTo(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp), reportErrors);
                             if (!related) {
                                 if (reportErrors) {
                                     reportError(ts.Diagnostics.Types_of_property_0_are_incompatible, symbolToString(targetProp));
                                 }
-                                return 0 /* False */;
+                                return 0;
                             }
                             result &= related;
-                            // When checking for comparability, be more lenient with optional properties.
-                            if (relation !== comparableRelation && sourceProp.flags & 16777216 /* Optional */ && !(targetProp.flags & 16777216 /* Optional */)) {
-                                // TypeScript 1.0 spec (April 2014): 3.8.3
-                                // S is a subtype of a type T, and T is a supertype of S if ...
-                                // S' and T are object types and, for each member M in T..
-                                // M is a property and S' contains a property N where
-                                // if M is a required property, N is also a required property
-                                // (M - property in T)
-                                // (N - property in S)
+                            if (relation !== comparableRelation && sourceProp.flags & 16777216 && !(targetProp.flags & 16777216)) {
                                 if (reportErrors) {
                                     reportError(ts.Diagnostics.Property_0_is_optional_in_type_1_but_required_in_type_2, symbolToString(targetProp), typeToString(source), typeToString(target));
                                 }
-                                return 0 /* False */;
+                                return 0;
                             }
                         }
                     }
                 }
                 return result;
             }
-            /**
-             * A type is 'weak' if it is an object type with at least one optional property
-             * and no required properties, call/construct signatures or index signatures
-             */
             function isWeakType(type) {
-                if (type.flags & 131072 /* Object */) {
+                if (type.flags & 131072) {
                     var resolved = resolveStructuredTypeMembers(type);
                     return resolved.callSignatures.length === 0 && resolved.constructSignatures.length === 0 &&
                         !resolved.stringIndexInfo && !resolved.numberIndexInfo &&
                         resolved.properties.length > 0 &&
-                        ts.every(resolved.properties, function (p) { return !!(p.flags & 16777216 /* Optional */); });
+                        ts.every(resolved.properties, function (p) { return !!(p.flags & 16777216); });
                 }
-                if (type.flags & 524288 /* Intersection */) {
+                if (type.flags & 524288) {
                     return ts.every(type.types, isWeakType);
                 }
                 return false;
             }
             function hasCommonProperties(source, target) {
-                var isComparingJsxAttributes = !!(ts.getObjectFlags(source) & 4096 /* JsxAttributes */);
+                var isComparingJsxAttributes = !!(ts.getObjectFlags(source) & 4096);
                 for (var _i = 0, _a = getPropertiesOfType(source); _i < _a.length; _i++) {
                     var prop = _a[_i];
                     if (isKnownProperty(target, prop.escapedName, isComparingJsxAttributes)) {
@@ -39435,24 +32674,24 @@ var ts;
                 return false;
             }
             function propertiesIdenticalTo(source, target) {
-                if (!(source.flags & 131072 /* Object */ && target.flags & 131072 /* Object */)) {
-                    return 0 /* False */;
+                if (!(source.flags & 131072 && target.flags & 131072)) {
+                    return 0;
                 }
                 var sourceProperties = getPropertiesOfObjectType(source);
                 var targetProperties = getPropertiesOfObjectType(target);
                 if (sourceProperties.length !== targetProperties.length) {
-                    return 0 /* False */;
+                    return 0;
                 }
-                var result = -1 /* True */;
+                var result = -1;
                 for (var _i = 0, sourceProperties_1 = sourceProperties; _i < sourceProperties_1.length; _i++) {
                     var sourceProp = sourceProperties_1[_i];
                     var targetProp = getPropertyOfObjectType(target, sourceProp.escapedName);
                     if (!targetProp) {
-                        return 0 /* False */;
+                        return 0;
                     }
                     var related = compareProperties(sourceProp, targetProp, isRelatedTo);
                     if (!related) {
-                        return 0 /* False */;
+                        return 0;
                     }
                     result &= related;
                 }
@@ -39463,57 +32702,43 @@ var ts;
                     return signaturesIdenticalTo(source, target, kind);
                 }
                 if (target === anyFunctionType || source === anyFunctionType) {
-                    return -1 /* True */;
+                    return -1;
                 }
                 var sourceSignatures = getSignaturesOfType(source, kind);
                 var targetSignatures = getSignaturesOfType(target, kind);
-                if (kind === 1 /* Construct */ && sourceSignatures.length && targetSignatures.length) {
+                if (kind === 1 && sourceSignatures.length && targetSignatures.length) {
                     if (ts.isAbstractConstructorType(source) && !ts.isAbstractConstructorType(target)) {
-                        // An abstract constructor type is not assignable to a non-abstract constructor type
-                        // as it would otherwise be possible to new an abstract class. Note that the assignability
-                        // check we perform for an extends clause excludes construct signatures from the target,
-                        // so this check never proceeds.
                         if (reportErrors) {
                             reportError(ts.Diagnostics.Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type);
                         }
-                        return 0 /* False */;
+                        return 0;
                     }
                     if (!constructorVisibilitiesAreCompatible(sourceSignatures[0], targetSignatures[0], reportErrors)) {
-                        return 0 /* False */;
+                        return 0;
                     }
                 }
-                var result = -1 /* True */;
+                var result = -1;
                 var saveErrorInfo = errorInfo;
-                if (ts.getObjectFlags(source) & 64 /* Instantiated */ && ts.getObjectFlags(target) & 64 /* Instantiated */ && source.symbol === target.symbol) {
-                    // We have instantiations of the same anonymous type (which typically will be the type of a
-                    // method). Simply do a pairwise comparison of the signatures in the two signature lists instead
-                    // of the much more expensive N * M comparison matrix we explore below. We erase type parameters
-                    // as they are known to always be the same.
+                if (ts.getObjectFlags(source) & 64 && ts.getObjectFlags(target) & 64 && source.symbol === target.symbol) {
                     for (var i = 0; i < targetSignatures.length; i++) {
-                        var related = signatureRelatedTo(sourceSignatures[i], targetSignatures[i], /*erase*/ true, reportErrors);
+                        var related = signatureRelatedTo(sourceSignatures[i], targetSignatures[i], true, reportErrors);
                         if (!related) {
-                            return 0 /* False */;
+                            return 0;
                         }
                         result &= related;
                     }
                 }
                 else if (sourceSignatures.length === 1 && targetSignatures.length === 1) {
-                    // For simple functions (functions with a single signature) we only erase type parameters for
-                    // the comparable relation. Otherwise, if the source signature is generic, we instantiate it
-                    // in the context of the target signature before checking the relationship. Ideally we'd do
-                    // this regardless of the number of signatures, but the potential costs are prohibitive due
-                    // to the quadratic nature of the logic below.
                     var eraseGenerics = relation === comparableRelation || !!compilerOptions.noStrictGenericChecks;
                     result = signatureRelatedTo(sourceSignatures[0], targetSignatures[0], eraseGenerics, reportErrors);
                 }
                 else {
                     outer: for (var _i = 0, targetSignatures_1 = targetSignatures; _i < targetSignatures_1.length; _i++) {
                         var t = targetSignatures_1[_i];
-                        // Only elaborate errors from the first failure
                         var shouldElaborateErrors = reportErrors;
                         for (var _a = 0, sourceSignatures_1 = sourceSignatures; _a < sourceSignatures_1.length; _a++) {
                             var s = sourceSignatures_1[_a];
-                            var related = signatureRelatedTo(s, t, /*erase*/ true, shouldElaborateErrors);
+                            var related = signatureRelatedTo(s, t, true, shouldElaborateErrors);
                             if (related) {
                                 result &= related;
                                 errorInfo = saveErrorInfo;
@@ -39522,53 +32747,49 @@ var ts;
                             shouldElaborateErrors = false;
                         }
                         if (shouldElaborateErrors) {
-                            reportError(ts.Diagnostics.Type_0_provides_no_match_for_the_signature_1, typeToString(source), signatureToString(t, /*enclosingDeclaration*/ undefined, /*flags*/ undefined, kind));
+                            reportError(ts.Diagnostics.Type_0_provides_no_match_for_the_signature_1, typeToString(source), signatureToString(t, undefined, undefined, kind));
                         }
-                        return 0 /* False */;
+                        return 0;
                     }
                 }
                 return result;
             }
-            /**
-             * See signatureAssignableTo, compareSignaturesIdentical
-             */
             function signatureRelatedTo(source, target, erase, reportErrors) {
-                return compareSignaturesRelated(erase ? getErasedSignature(source) : source, erase ? getErasedSignature(target) : target, 0 /* None */, /*ignoreReturnTypes*/ false, reportErrors, reportError, isRelatedTo);
+                return compareSignaturesRelated(erase ? getErasedSignature(source) : source, erase ? getErasedSignature(target) : target, 0, false, reportErrors, reportError, isRelatedTo);
             }
             function signaturesIdenticalTo(source, target, kind) {
                 var sourceSignatures = getSignaturesOfType(source, kind);
                 var targetSignatures = getSignaturesOfType(target, kind);
                 if (sourceSignatures.length !== targetSignatures.length) {
-                    return 0 /* False */;
+                    return 0;
                 }
-                var result = -1 /* True */;
+                var result = -1;
                 for (var i = 0; i < sourceSignatures.length; i++) {
-                    var related = compareSignaturesIdentical(sourceSignatures[i], targetSignatures[i], /*partialMatch*/ false, /*ignoreThisTypes*/ false, /*ignoreReturnTypes*/ false, isRelatedTo);
+                    var related = compareSignaturesIdentical(sourceSignatures[i], targetSignatures[i], false, false, false, isRelatedTo);
                     if (!related) {
-                        return 0 /* False */;
+                        return 0;
                     }
                     result &= related;
                 }
                 return result;
             }
             function eachPropertyRelatedTo(source, target, kind, reportErrors) {
-                var result = -1 /* True */;
+                var result = -1;
                 for (var _i = 0, _a = getPropertiesOfObjectType(source); _i < _a.length; _i++) {
                     var prop = _a[_i];
-                    if (isIgnoredJsxProperty(source, prop, /*targetMemberType*/ undefined)) {
+                    if (isIgnoredJsxProperty(source, prop, undefined)) {
                         continue;
                     }
-                    // Skip over symbol-named members
-                    if (prop.nameType && prop.nameType.flags & 2048 /* UniqueESSymbol */) {
+                    if (prop.nameType && prop.nameType.flags & 2048) {
                         continue;
                     }
-                    if (kind === 0 /* String */ || isNumericLiteralName(prop.escapedName)) {
+                    if (kind === 0 || isNumericLiteralName(prop.escapedName)) {
                         var related = isRelatedTo(getTypeOfSymbol(prop), target, reportErrors);
                         if (!related) {
                             if (reportErrors) {
                                 reportError(ts.Diagnostics.Property_0_is_incompatible_with_index_signature, symbolToString(prop));
                             }
-                            return 0 /* False */;
+                            return 0;
                         }
                         result &= related;
                     }
@@ -39587,24 +32808,21 @@ var ts;
                     return indexTypesIdenticalTo(source, target, kind);
                 }
                 var targetInfo = getIndexInfoOfType(target, kind);
-                if (!targetInfo || targetInfo.type.flags & 3 /* AnyOrUnknown */ && !sourceIsPrimitive) {
-                    // Index signature of type any permits assignment from everything but primitives
-                    return -1 /* True */;
+                if (!targetInfo || targetInfo.type.flags & 3 && !sourceIsPrimitive) {
+                    return -1;
                 }
                 var sourceInfo = getIndexInfoOfType(source, kind) ||
-                    kind === 1 /* Number */ && getIndexInfoOfType(source, 0 /* String */);
+                    kind === 1 && getIndexInfoOfType(source, 0);
                 if (sourceInfo) {
                     return indexInfoRelatedTo(sourceInfo, targetInfo, reportErrors);
                 }
                 if (isGenericMappedType(source)) {
-                    // A generic mapped type { [P in K]: T } is related to an index signature { [x: string]: U }
-                    // if T is related to U.
-                    return (kind === 0 /* String */ && isRelatedTo(getTemplateTypeFromMappedType(source), targetInfo.type, reportErrors)); // TODO: GH#18217
+                    return (kind === 0 && isRelatedTo(getTemplateTypeFromMappedType(source), targetInfo.type, reportErrors));
                 }
                 if (isObjectTypeWithInferableIndex(source)) {
-                    var related = -1 /* True */;
-                    if (kind === 0 /* String */) {
-                        var sourceNumberInfo = getIndexInfoOfType(source, 1 /* Number */);
+                    var related = -1;
+                    if (kind === 0) {
+                        var sourceNumberInfo = getIndexInfoOfType(source, 1);
                         if (sourceNumberInfo) {
                             related = indexInfoRelatedTo(sourceNumberInfo, targetInfo, reportErrors);
                         }
@@ -39617,35 +32835,32 @@ var ts;
                 if (reportErrors) {
                     reportError(ts.Diagnostics.Index_signature_is_missing_in_type_0, typeToString(source));
                 }
-                return 0 /* False */;
+                return 0;
             }
             function indexTypesIdenticalTo(source, target, indexKind) {
                 var targetInfo = getIndexInfoOfType(target, indexKind);
                 var sourceInfo = getIndexInfoOfType(source, indexKind);
                 if (!sourceInfo && !targetInfo) {
-                    return -1 /* True */;
+                    return -1;
                 }
                 if (sourceInfo && targetInfo && sourceInfo.isReadonly === targetInfo.isReadonly) {
                     return isRelatedTo(sourceInfo.type, targetInfo.type);
                 }
-                return 0 /* False */;
+                return 0;
             }
             function constructorVisibilitiesAreCompatible(sourceSignature, targetSignature, reportErrors) {
                 if (!sourceSignature.declaration || !targetSignature.declaration) {
                     return true;
                 }
-                var sourceAccessibility = ts.getSelectedModifierFlags(sourceSignature.declaration, 24 /* NonPublicAccessibilityModifier */);
-                var targetAccessibility = ts.getSelectedModifierFlags(targetSignature.declaration, 24 /* NonPublicAccessibilityModifier */);
-                // A public, protected and private signature is assignable to a private signature.
-                if (targetAccessibility === 8 /* Private */) {
+                var sourceAccessibility = ts.getSelectedModifierFlags(sourceSignature.declaration, 24);
+                var targetAccessibility = ts.getSelectedModifierFlags(targetSignature.declaration, 24);
+                if (targetAccessibility === 8) {
                     return true;
                 }
-                // A public and protected signature is assignable to a protected signature.
-                if (targetAccessibility === 16 /* Protected */ && sourceAccessibility !== 8 /* Private */) {
+                if (targetAccessibility === 16 && sourceAccessibility !== 8) {
                     return true;
                 }
-                // Only a public signature is assignable to public signature.
-                if (targetAccessibility !== 16 /* Protected */ && !sourceAccessibility) {
+                if (targetAccessibility !== 16 && !sourceAccessibility) {
                     return true;
                 }
                 if (reportErrors) {
@@ -39654,19 +32869,11 @@ var ts;
                 return false;
             }
         }
-        // Return a type reference where the source type parameter is replaced with the target marker
-        // type, and flag the result as a marker type reference.
         function getMarkerTypeReference(type, source, target) {
             var result = createTypeReference(type, ts.map(type.typeParameters, function (t) { return t === source ? target : t; }));
-            result.objectFlags |= 8192 /* MarkerType */;
+            result.objectFlags |= 8192;
             return result;
         }
-        // Return an array containing the variance of each type parameter. The variance is effectively
-        // a digest of the type comparisons that occur for each type argument when instantiations of the
-        // generic type are structurally compared. We infer the variance information by comparing
-        // instantiations of the generic type for type arguments with known relations. The function
-        // returns the emptyArray singleton if we're not in strictFunctionTypes mode or if the function
-        // has been invoked recursively for the given generic type.
         function getVariances(type) {
             if (!strictFunctionTypes) {
                 return ts.emptyArray;
@@ -39675,28 +32882,19 @@ var ts;
             var variances = type.variances;
             if (!variances) {
                 if (type === globalArrayType || type === globalReadonlyArrayType) {
-                    // Arrays are known to be covariant, no need to spend time computing this
-                    variances = [1 /* Covariant */];
+                    variances = [1];
                 }
                 else {
-                    // The emptyArray singleton is used to signal a recursive invocation.
                     type.variances = ts.emptyArray;
                     variances = [];
                     for (var _i = 0, typeParameters_1 = typeParameters; _i < typeParameters_1.length; _i++) {
                         var tp = typeParameters_1[_i];
-                        // We first compare instantiations where the type parameter is replaced with
-                        // marker types that have a known subtype relationship. From this we can infer
-                        // invariance, covariance, contravariance or bivariance.
                         var typeWithSuper = getMarkerTypeReference(type, tp, markerSuperType);
                         var typeWithSub = getMarkerTypeReference(type, tp, markerSubType);
-                        var variance = (isTypeAssignableTo(typeWithSub, typeWithSuper) ? 1 /* Covariant */ : 0) |
-                            (isTypeAssignableTo(typeWithSuper, typeWithSub) ? 2 /* Contravariant */ : 0);
-                        // If the instantiations appear to be related bivariantly it may be because the
-                        // type parameter is independent (i.e. it isn't witnessed anywhere in the generic
-                        // type). To determine this we compare instantiations where the type parameter is
-                        // replaced with marker types that are known to be unrelated.
-                        if (variance === 3 /* Bivariant */ && isTypeAssignableTo(getMarkerTypeReference(type, tp, markerOtherType), typeWithSuper)) {
-                            variance = 4 /* Independent */;
+                        var variance = (isTypeAssignableTo(typeWithSub, typeWithSuper) ? 1 : 0) |
+                            (isTypeAssignableTo(typeWithSuper, typeWithSub) ? 2 : 0);
+                        if (variance === 3 && isTypeAssignableTo(getMarkerTypeReference(type, tp, markerOtherType), typeWithSuper)) {
+                            variance = 4;
                         }
                         variances.push(variance);
                     }
@@ -39705,26 +32903,20 @@ var ts;
             }
             return variances;
         }
-        // Return true if the given type reference has a 'void' type argument for a covariant type parameter.
-        // See comment at call in recursiveTypeRelatedTo for when this case matters.
         function hasCovariantVoidArgument(type, variances) {
             for (var i = 0; i < variances.length; i++) {
-                if (variances[i] === 1 /* Covariant */ && type.typeArguments[i].flags & 4096 /* Void */) {
+                if (variances[i] === 1 && type.typeArguments[i].flags & 4096) {
                     return true;
                 }
             }
             return false;
         }
         function isUnconstrainedTypeParameter(type) {
-            return type.flags & 65536 /* TypeParameter */ && !getConstraintFromTypeParameter(type);
+            return type.flags & 65536 && !getConstraintFromTypeParameter(type);
         }
         function isTypeReferenceWithGenericArguments(type) {
-            return !!(ts.getObjectFlags(type) & 4 /* Reference */) && ts.some(type.typeArguments, function (t) { return isUnconstrainedTypeParameter(t) || isTypeReferenceWithGenericArguments(t); });
+            return !!(ts.getObjectFlags(type) & 4) && ts.some(type.typeArguments, function (t) { return isUnconstrainedTypeParameter(t) || isTypeReferenceWithGenericArguments(t); });
         }
-        /**
-         * getTypeReferenceId(A<T, number, U>) returns "111=0-12=1"
-         *   where A.id=111 and number.id=12
-         */
         function getTypeReferenceId(type, typeParameters, depth) {
             if (depth === void 0) { depth = 0; }
             var result = "" + type.target.id;
@@ -39747,10 +32939,6 @@ var ts;
             }
             return result;
         }
-        /**
-         * To improve caching, the relation key for two generic types uses the target's id plus ids of the type parameters.
-         * For other cases, the types ids are used.
-         */
         function getRelationKey(source, target, relation) {
             if (relation === identityRelation && source.id > target.id) {
                 var temp = source;
@@ -39763,10 +32951,8 @@ var ts;
             }
             return source.id + "," + target.id;
         }
-        // Invoke the callback for each underlying property symbol of the given symbol and return the first
-        // value that isn't undefined.
         function forEachProperty(prop, callback) {
-            if (ts.getCheckFlags(prop) & 6 /* Synthetic */) {
+            if (ts.getCheckFlags(prop) & 6) {
                 for (var _i = 0, _a = prop.containingType.types; _i < _a.length; _i++) {
                     var t = _a[_i];
                     var p = getPropertyOfType(t, prop.escapedName);
@@ -39779,43 +32965,31 @@ var ts;
             }
             return callback(prop);
         }
-        // Return the declaring class type of a property or undefined if property not declared in class
         function getDeclaringClass(prop) {
-            return prop.parent && prop.parent.flags & 32 /* Class */ ? getDeclaredTypeOfSymbol(getParentOfSymbol(prop)) : undefined;
+            return prop.parent && prop.parent.flags & 32 ? getDeclaredTypeOfSymbol(getParentOfSymbol(prop)) : undefined;
         }
-        // Return true if some underlying source property is declared in a class that derives
-        // from the given base class.
         function isPropertyInClassDerivedFrom(prop, baseClass) {
             return forEachProperty(prop, function (sp) {
                 var sourceClass = getDeclaringClass(sp);
                 return sourceClass ? hasBaseType(sourceClass, baseClass) : false;
             });
         }
-        // Return true if source property is a valid override of protected parts of target property.
         function isValidOverrideOf(sourceProp, targetProp) {
-            return !forEachProperty(targetProp, function (tp) { return ts.getDeclarationModifierFlagsFromSymbol(tp) & 16 /* Protected */ ?
+            return !forEachProperty(targetProp, function (tp) { return ts.getDeclarationModifierFlagsFromSymbol(tp) & 16 ?
                 !isPropertyInClassDerivedFrom(sourceProp, getDeclaringClass(tp)) : false; });
         }
-        // Return true if the given class derives from each of the declaring classes of the protected
-        // constituents of the given property.
         function isClassDerivedFromDeclaringClasses(checkClass, prop) {
-            return forEachProperty(prop, function (p) { return ts.getDeclarationModifierFlagsFromSymbol(p) & 16 /* Protected */ ?
+            return forEachProperty(prop, function (p) { return ts.getDeclarationModifierFlagsFromSymbol(p) & 16 ?
                 !hasBaseType(checkClass, getDeclaringClass(p)) : false; }) ? undefined : checkClass;
         }
-        // Return true if the given type is deeply nested. We consider this to be the case when structural type comparisons
-        // for 5 or more occurrences or instantiations of the type have been recorded on the given stack. It is possible,
-        // though highly unlikely, for this test to be true in a situation where a chain of instantiations is not infinitely
-        // expanding. Effectively, we will generate a false positive when two types are structurally equal to at least 5
-        // levels, but unequal at some level beyond that.
         function isDeeplyNestedType(type, stack, depth) {
-            // We track all object types that have an associated symbol (representing the origin of the type)
-            if (depth >= 5 && type.flags & 131072 /* Object */) {
+            if (depth >= 5 && type.flags & 131072) {
                 var symbol = type.symbol;
                 if (symbol) {
                     var count = 0;
                     for (var i = 0; i < depth; i++) {
                         var t = stack[i];
-                        if (t.flags & 131072 /* Object */ && t.symbol === symbol) {
+                        if (t.flags & 131072 && t.symbol === symbol) {
                             count++;
                             if (count >= 5)
                                 return true;
@@ -39826,46 +33000,38 @@ var ts;
             return false;
         }
         function isPropertyIdenticalTo(sourceProp, targetProp) {
-            return compareProperties(sourceProp, targetProp, compareTypesIdentical) !== 0 /* False */;
+            return compareProperties(sourceProp, targetProp, compareTypesIdentical) !== 0;
         }
         function compareProperties(sourceProp, targetProp, compareTypes) {
-            // Two members are considered identical when
-            // - they are public properties with identical names, optionality, and types,
-            // - they are private or protected properties originating in the same declaration and having identical types
             if (sourceProp === targetProp) {
-                return -1 /* True */;
+                return -1;
             }
-            var sourcePropAccessibility = ts.getDeclarationModifierFlagsFromSymbol(sourceProp) & 24 /* NonPublicAccessibilityModifier */;
-            var targetPropAccessibility = ts.getDeclarationModifierFlagsFromSymbol(targetProp) & 24 /* NonPublicAccessibilityModifier */;
+            var sourcePropAccessibility = ts.getDeclarationModifierFlagsFromSymbol(sourceProp) & 24;
+            var targetPropAccessibility = ts.getDeclarationModifierFlagsFromSymbol(targetProp) & 24;
             if (sourcePropAccessibility !== targetPropAccessibility) {
-                return 0 /* False */;
+                return 0;
             }
             if (sourcePropAccessibility) {
                 if (getTargetSymbol(sourceProp) !== getTargetSymbol(targetProp)) {
-                    return 0 /* False */;
+                    return 0;
                 }
             }
             else {
-                if ((sourceProp.flags & 16777216 /* Optional */) !== (targetProp.flags & 16777216 /* Optional */)) {
-                    return 0 /* False */;
+                if ((sourceProp.flags & 16777216) !== (targetProp.flags & 16777216)) {
+                    return 0;
                 }
             }
             if (isReadonlySymbol(sourceProp) !== isReadonlySymbol(targetProp)) {
-                return 0 /* False */;
+                return 0;
             }
             return compareTypes(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp));
         }
         function isMatchingSignature(source, target, partialMatch) {
-            // A source signature matches a target signature if the two signatures have the same number of required,
-            // optional, and rest parameters.
             if (source.parameters.length === target.parameters.length &&
                 source.minArgumentCount === target.minArgumentCount &&
                 source.hasRestParameter === target.hasRestParameter) {
                 return true;
             }
-            // A source signature partially matches a target signature if the target signature has no fewer required
-            // parameters and no more overall parameters than the source signature (where a signature with a rest
-            // parameter is always considered to have more overall parameters than one without).
             var sourceRestCount = source.hasRestParameter ? 1 : 0;
             var targetRestCount = target.hasRestParameter ? 1 : 0;
             if (partialMatch && source.minArgumentCount <= target.minArgumentCount && (sourceRestCount > targetRestCount ||
@@ -39874,30 +33040,19 @@ var ts;
             }
             return false;
         }
-        /**
-         * See signatureRelatedTo, compareSignaturesIdentical
-         */
         function compareSignaturesIdentical(source, target, partialMatch, ignoreThisTypes, ignoreReturnTypes, compareTypes) {
-            // TODO (drosen): De-duplicate code between related functions.
             if (source === target) {
-                return -1 /* True */;
+                return -1;
             }
             if (!(isMatchingSignature(source, target, partialMatch))) {
-                return 0 /* False */;
+                return 0;
             }
-            // Check that the two signatures have the same number of type parameters. We might consider
-            // also checking that any type parameter constraints match, but that would require instantiating
-            // the constraints with a common set of type arguments to get relatable entities in places where
-            // type parameters occur in the constraints. The complexity of doing that doesn't seem worthwhile,
-            // particularly as we're comparing erased versions of the signatures below.
             if (ts.length(source.typeParameters) !== ts.length(target.typeParameters)) {
-                return 0 /* False */;
+                return 0;
             }
-            // Spec 1.0 Section 3.8.3 & 3.8.4:
-            // M and N (the signatures) are instantiated using type Any as the type argument for all type parameters declared by M and N
             source = getErasedSignature(source);
             target = getErasedSignature(target);
-            var result = -1 /* True */;
+            var result = -1;
             if (!ignoreThisTypes) {
                 var sourceThisType = getThisTypeOfSignature(source);
                 if (sourceThisType) {
@@ -39905,7 +33060,7 @@ var ts;
                     if (targetThisType) {
                         var related = compareTypes(sourceThisType, targetThisType);
                         if (!related) {
-                            return 0 /* False */;
+                            return 0;
                         }
                         result &= related;
                     }
@@ -39917,7 +33072,7 @@ var ts;
                 var t = isRestParameterIndex(target, i) ? getRestTypeOfSignature(target) : getTypeOfParameter(target.parameters[i]);
                 var related = compareTypes(s, t);
                 if (!related) {
-                    return 0 /* False */;
+                    return 0;
                 }
                 result &= related;
             }
@@ -39926,13 +33081,12 @@ var ts;
                 var targetTypePredicate = getTypePredicateOfSignature(target);
                 result &= sourceTypePredicate !== undefined || targetTypePredicate !== undefined
                     ? compareTypePredicatesIdentical(sourceTypePredicate, targetTypePredicate, compareTypes)
-                    // If they're both type predicates their return types will both be `boolean`, so no need to compare those.
                     : compareTypes(getReturnTypeOfSignature(source), getReturnTypeOfSignature(target));
             }
             return result;
         }
         function compareTypePredicatesIdentical(source, target, compareTypes) {
-            return source === undefined || target === undefined || !typePredicateKindsMatch(source, target) ? 0 /* False */ : compareTypes(source.type, target.type);
+            return source === undefined || target === undefined || !typePredicateKindsMatch(source, target) ? 0 : compareTypes(source.type, target.type);
         }
         function isRestParameterIndex(signature, parameterIndex) {
             return signature.hasRestParameter && parameterIndex >= signature.parameters.length - 1;
@@ -39951,9 +33105,6 @@ var ts;
             }
             return true;
         }
-        // When the candidate types are all literal types with the same base type, return a union
-        // of those literal types. Otherwise, return the leftmost type for which no type to the
-        // right is a supertype.
         function getSupertypeOrUnion(types) {
             return literalTypesWithSameBaseType(types) ?
                 getUnionType(types) :
@@ -39963,23 +33114,20 @@ var ts;
             if (!strictNullChecks) {
                 return getSupertypeOrUnion(types);
             }
-            var primaryTypes = ts.filter(types, function (t) { return !(t.flags & 24576 /* Nullable */); });
+            var primaryTypes = ts.filter(types, function (t) { return !(t.flags & 24576); });
             return primaryTypes.length ?
-                getNullableType(getSupertypeOrUnion(primaryTypes), getFalsyFlagsOfTypes(types) & 24576 /* Nullable */) :
-                getUnionType(types, 2 /* Subtype */);
+                getNullableType(getSupertypeOrUnion(primaryTypes), getFalsyFlagsOfTypes(types) & 24576) :
+                getUnionType(types, 2);
         }
-        // Return the leftmost type for which no type to the right is a subtype.
         function getCommonSubtype(types) {
             return ts.reduceLeft(types, function (s, t) { return isTypeSubtypeOf(t, s) ? t : s; });
         }
         function isArrayType(type) {
-            return !!(ts.getObjectFlags(type) & 4 /* Reference */) && type.target === globalArrayType;
+            return !!(ts.getObjectFlags(type) & 4) && type.target === globalArrayType;
         }
         function isArrayLikeType(type) {
-            // A type is array-like if it is a reference to the global Array or global ReadonlyArray type,
-            // or if it is not the undefined or null type and if it is assignable to ReadonlyArray<any>
-            return ts.getObjectFlags(type) & 4 /* Reference */ && (type.target === globalArrayType || type.target === globalReadonlyArrayType) ||
-                !(type.flags & 24576 /* Nullable */) && isTypeAssignableTo(type, anyReadonlyArrayType);
+            return ts.getObjectFlags(type) & 4 && (type.target === globalArrayType || type.target === globalReadonlyArrayType) ||
+                !(type.flags & 24576) && isTypeAssignableTo(type, anyReadonlyArrayType);
         }
         function isEmptyArrayLiteralType(type) {
             var elementType = isArrayType(type) ? type.typeArguments[0] : undefined;
@@ -39989,35 +33137,35 @@ var ts;
             return !!getPropertyOfType(type, "0");
         }
         function isNeitherUnitTypeNorNever(type) {
-            return !(type.flags & (27072 /* Unit */ | 32768 /* Never */));
+            return !(type.flags & (27072 | 32768));
         }
         function isUnitType(type) {
-            return !!(type.flags & 27072 /* Unit */);
+            return !!(type.flags & 27072);
         }
         function isLiteralType(type) {
-            return type.flags & 16 /* Boolean */ ? true :
-                type.flags & 262144 /* Union */ ? type.flags & 512 /* EnumLiteral */ ? true : ts.every(type.types, isUnitType) :
+            return type.flags & 16 ? true :
+                type.flags & 262144 ? type.flags & 512 ? true : ts.every(type.types, isUnitType) :
                     isUnitType(type);
         }
         function getBaseTypeOfLiteralType(type) {
-            return type.flags & 512 /* EnumLiteral */ ? getBaseTypeOfEnumLiteralType(type) :
-                type.flags & 64 /* StringLiteral */ ? stringType :
-                    type.flags & 128 /* NumberLiteral */ ? numberType :
-                        type.flags & 256 /* BooleanLiteral */ ? booleanType :
-                            type.flags & 262144 /* Union */ ? getUnionType(ts.sameMap(type.types, getBaseTypeOfLiteralType)) :
+            return type.flags & 512 ? getBaseTypeOfEnumLiteralType(type) :
+                type.flags & 64 ? stringType :
+                    type.flags & 128 ? numberType :
+                        type.flags & 256 ? booleanType :
+                            type.flags & 262144 ? getUnionType(ts.sameMap(type.types, getBaseTypeOfLiteralType)) :
                                 type;
         }
         function getWidenedLiteralType(type) {
-            return type.flags & 512 /* EnumLiteral */ ? getBaseTypeOfEnumLiteralType(type) :
-                type.flags & 64 /* StringLiteral */ && type.flags & 33554432 /* FreshLiteral */ ? stringType :
-                    type.flags & 128 /* NumberLiteral */ && type.flags & 33554432 /* FreshLiteral */ ? numberType :
-                        type.flags & 256 /* BooleanLiteral */ ? booleanType :
-                            type.flags & 262144 /* Union */ ? getUnionType(ts.sameMap(type.types, getWidenedLiteralType)) :
+            return type.flags & 512 ? getBaseTypeOfEnumLiteralType(type) :
+                type.flags & 64 && type.flags & 33554432 ? stringType :
+                    type.flags & 128 && type.flags & 33554432 ? numberType :
+                        type.flags & 256 ? booleanType :
+                            type.flags & 262144 ? getUnionType(ts.sameMap(type.types, getWidenedLiteralType)) :
                                 type;
         }
         function getWidenedUniqueESSymbolType(type) {
-            return type.flags & 2048 /* UniqueESSymbol */ ? esSymbolType :
-                type.flags & 262144 /* Union */ ? getUnionType(ts.sameMap(type.types, getWidenedUniqueESSymbolType)) :
+            return type.flags & 2048 ? esSymbolType :
+                type.flags & 262144 ? getUnionType(ts.sameMap(type.types, getWidenedUniqueESSymbolType)) :
                     type;
         }
         function getWidenedLiteralLikeTypeForContextualType(type, contextualType) {
@@ -40026,12 +33174,8 @@ var ts;
             }
             return type;
         }
-        /**
-         * Check if a Type was written as a tuple type literal.
-         * Prefer using isTupleLikeType() unless the use of `elementTypes` is required.
-         */
         function isTupleType(type) {
-            return !!(ts.getObjectFlags(type) & 4 /* Reference */ && type.target.objectFlags & 8 /* Tuple */);
+            return !!(ts.getObjectFlags(type) & 4 && type.target.objectFlags & 8);
         }
         function getFalsyFlagsOfTypes(types) {
             var result = 0;
@@ -40041,68 +33185,55 @@ var ts;
             }
             return result;
         }
-        // Returns the String, Number, Boolean, StringLiteral, NumberLiteral, BooleanLiteral, Void, Undefined, or Null
-        // flags for the string, number, boolean, "", 0, false, void, undefined, or null types respectively. Returns
-        // no flags for all other types (including non-falsy literal types).
         function getFalsyFlags(type) {
-            return type.flags & 262144 /* Union */ ? getFalsyFlagsOfTypes(type.types) :
-                type.flags & 64 /* StringLiteral */ ? type.value === "" ? 64 /* StringLiteral */ : 0 :
-                    type.flags & 128 /* NumberLiteral */ ? type.value === 0 ? 128 /* NumberLiteral */ : 0 :
-                        type.flags & 256 /* BooleanLiteral */ ? type === falseType ? 256 /* BooleanLiteral */ : 0 :
-                            type.flags & 29148 /* PossiblyFalsy */;
+            return type.flags & 262144 ? getFalsyFlagsOfTypes(type.types) :
+                type.flags & 64 ? type.value === "" ? 64 : 0 :
+                    type.flags & 128 ? type.value === 0 ? 128 : 0 :
+                        type.flags & 256 ? type === falseType ? 256 : 0 :
+                            type.flags & 29148;
         }
         function removeDefinitelyFalsyTypes(type) {
-            return getFalsyFlags(type) & 29120 /* DefinitelyFalsy */ ?
-                filterType(type, function (t) { return !(getFalsyFlags(t) & 29120 /* DefinitelyFalsy */); }) :
+            return getFalsyFlags(type) & 29120 ?
+                filterType(type, function (t) { return !(getFalsyFlags(t) & 29120); }) :
                 type;
         }
         function extractDefinitelyFalsyTypes(type) {
             return mapType(type, getDefinitelyFalsyPartOfType);
         }
         function getDefinitelyFalsyPartOfType(type) {
-            return type.flags & 4 /* String */ ? emptyStringType :
-                type.flags & 8 /* Number */ ? zeroType :
-                    type.flags & 16 /* Boolean */ || type === falseType ? falseType :
-                        type.flags & (4096 /* Void */ | 8192 /* Undefined */ | 16384 /* Null */) ||
-                            type.flags & 64 /* StringLiteral */ && type.value === "" ||
-                            type.flags & 128 /* NumberLiteral */ && type.value === 0 ? type :
+            return type.flags & 4 ? emptyStringType :
+                type.flags & 8 ? zeroType :
+                    type.flags & 16 || type === falseType ? falseType :
+                        type.flags & (4096 | 8192 | 16384) ||
+                            type.flags & 64 && type.value === "" ||
+                            type.flags & 128 && type.value === 0 ? type :
                             neverType;
         }
-        /**
-         * Add undefined or null or both to a type if they are missing.
-         * @param type - type to add undefined and/or null to if not present
-         * @param flags - Either TypeFlags.Undefined or TypeFlags.Null, or both
-         */
         function getNullableType(type, flags) {
-            var missing = (flags & ~type.flags) & (8192 /* Undefined */ | 16384 /* Null */);
+            var missing = (flags & ~type.flags) & (8192 | 16384);
             return missing === 0 ? type :
-                missing === 8192 /* Undefined */ ? getUnionType([type, undefinedType]) :
-                    missing === 16384 /* Null */ ? getUnionType([type, nullType]) :
+                missing === 8192 ? getUnionType([type, undefinedType]) :
+                    missing === 16384 ? getUnionType([type, nullType]) :
                         getUnionType([type, undefinedType, nullType]);
         }
         function getOptionalType(type) {
             ts.Debug.assert(strictNullChecks);
-            return type.flags & 8192 /* Undefined */ ? type : getUnionType([type, undefinedType]);
+            return type.flags & 8192 ? type : getUnionType([type, undefinedType]);
         }
         function getGlobalNonNullableTypeInstantiation(type) {
             if (!deferredGlobalNonNullableTypeAlias) {
-                deferredGlobalNonNullableTypeAlias = getGlobalSymbol("NonNullable", 524288 /* TypeAlias */, /*diagnostic*/ undefined) || unknownSymbol;
+                deferredGlobalNonNullableTypeAlias = getGlobalSymbol("NonNullable", 524288, undefined) || unknownSymbol;
             }
-            // Use NonNullable global type alias if available to improve quick info/declaration emit
             if (deferredGlobalNonNullableTypeAlias !== unknownSymbol) {
                 return getTypeAliasInstantiation(deferredGlobalNonNullableTypeAlias, [type]);
             }
-            return getTypeWithFacts(type, 524288 /* NEUndefinedOrNull */); // Type alias unavailable, fall back to non-higherorder behavior
+            return getTypeWithFacts(type, 524288);
         }
         function getNonNullableType(type) {
             return strictNullChecks ? getGlobalNonNullableTypeInstantiation(type) : type;
         }
-        /**
-         * Return true if type was inferred from an object literal, written as an object type literal, or is the shape of a module
-         * with no call or construct signatures.
-         */
         function isObjectTypeWithInferableIndex(type) {
-            return type.symbol && (type.symbol.flags & (4096 /* ObjectLiteral */ | 2048 /* TypeLiteral */ | 512 /* ValueModule */)) !== 0 &&
+            return type.symbol && (type.symbol.flags & (4096 | 2048 | 512)) !== 0 &&
                 !typeHasCallOrConstructSignatures(type);
         }
         function createSymbolWithType(source, type) {
@@ -40129,13 +33260,8 @@ var ts;
             }
             return members;
         }
-        /**
-         * If the the provided object literal is subject to the excess properties check,
-         * create a new that is exempt. Recursively mark object literal members as exempt.
-         * Leave signatures alone since they are not subject to the check.
-         */
         function getRegularTypeOfObjectLiteral(type) {
-            if (!(isObjectLiteralType(type) && type.flags & 33554432 /* FreshLiteral */)) {
+            if (!(isObjectLiteralType(type) && type.flags & 33554432)) {
                 return type;
             }
             var regularType = type.regularType;
@@ -40145,8 +33271,8 @@ var ts;
             var resolved = type;
             var members = transformTypeOfMembers(type, getRegularTypeOfObjectLiteral);
             var regularNew = createAnonymousType(resolved.symbol, members, resolved.callSignatures, resolved.constructSignatures, resolved.stringIndexInfo, resolved.numberIndexInfo);
-            regularNew.flags = resolved.flags & ~33554432 /* FreshLiteral */;
-            regularNew.objectFlags |= 128 /* ObjectLiteral */;
+            regularNew.flags = resolved.flags & ~33554432;
+            regularNew.objectFlags |= 128;
             type.regularType = regularNew;
             return regularNew;
         }
@@ -40176,7 +33302,7 @@ var ts;
                 var names = ts.createMap();
                 for (var _i = 0, _a = getSiblingsOfContext(context); _i < _a.length; _i++) {
                     var t = _a[_i];
-                    if (isObjectLiteralType(t) && !(ts.getObjectFlags(t) & 1024 /* ContainsSpread */)) {
+                    if (isObjectLiteralType(t) && !(ts.getObjectFlags(t) & 1024)) {
                         for (var _b = 0, _c = getPropertiesOfType(t); _b < _c.length; _b++) {
                             var prop = _c[_b];
                             names.set(prop.escapedName, prop);
@@ -40188,21 +33314,18 @@ var ts;
             return context.resolvedProperties;
         }
         function getWidenedProperty(prop, context) {
-            if (!(prop.flags & 4 /* Property */)) {
-                // Since get accessors already widen their return value there is no need to
-                // widen accessor based properties here.
+            if (!(prop.flags & 4)) {
                 return prop;
             }
-            if (prop.flags & 67108864 /* JSContainer */) {
+            if (prop.flags & 67108864) {
                 var node = prop.declarations && ts.first(prop.declarations);
                 var init = ts.getAssignedJavascriptInitializer(node);
-                if (init && init.kind !== 184 /* ObjectLiteralExpression */) {
-                    // for JS special declarations, the only kind of initializer that will widen is object literals
+                if (init && init.kind !== 184) {
                     return prop;
                 }
             }
             var original = getTypeOfSymbol(prop);
-            var propContext = context && createWideningContext(context, prop.escapedName, /*siblings*/ undefined);
+            var propContext = context && createWideningContext(context, prop.escapedName, undefined);
             var widened = getWidenedTypeWithContext(original, propContext);
             return widened === original ? prop : createSymbolWithType(prop, widened);
         }
@@ -40212,7 +33335,7 @@ var ts;
                 return cached;
             }
             var result = createSymbolWithType(prop, undefinedType);
-            result.flags |= 16777216 /* Optional */;
+            result.flags |= 16777216;
             undefinedProperties.set(prop.escapedName, result);
             return result;
         }
@@ -40230,28 +33353,25 @@ var ts;
                     }
                 }
             }
-            var stringIndexInfo = getIndexInfoOfType(type, 0 /* String */);
-            var numberIndexInfo = getIndexInfoOfType(type, 1 /* Number */);
+            var stringIndexInfo = getIndexInfoOfType(type, 0);
+            var numberIndexInfo = getIndexInfoOfType(type, 1);
             return createAnonymousType(type.symbol, members, ts.emptyArray, ts.emptyArray, stringIndexInfo && createIndexInfo(getWidenedType(stringIndexInfo.type), stringIndexInfo.isReadonly), numberIndexInfo && createIndexInfo(getWidenedType(numberIndexInfo.type), numberIndexInfo.isReadonly));
         }
         function getWidenedType(type) {
-            return getWidenedTypeWithContext(type, /*context*/ undefined);
+            return getWidenedTypeWithContext(type, undefined);
         }
         function getWidenedTypeWithContext(type, context) {
-            if (type.flags & 402653184 /* RequiresWidening */) {
-                if (type.flags & 24576 /* Nullable */) {
+            if (type.flags & 402653184) {
+                if (type.flags & 24576) {
                     return anyType;
                 }
                 if (isObjectLiteralType(type)) {
                     return getWidenedTypeOfObjectLiteral(type, context);
                 }
-                if (type.flags & 262144 /* Union */) {
-                    var unionContext_1 = context || createWideningContext(/*parent*/ undefined, /*propertyName*/ undefined, type.types);
-                    var widenedTypes = ts.sameMap(type.types, function (t) { return t.flags & 24576 /* Nullable */ ? t : getWidenedTypeWithContext(t, unionContext_1); });
-                    // Widening an empty object literal transitions from a highly restrictive type to
-                    // a highly inclusive one. For that reason we perform subtype reduction here if the
-                    // union includes empty object types (e.g. reducing {} | string to just {}).
-                    return getUnionType(widenedTypes, ts.some(widenedTypes, isEmptyObjectType) ? 2 /* Subtype */ : 1 /* Literal */);
+                if (type.flags & 262144) {
+                    var unionContext_1 = context || createWideningContext(undefined, undefined, type.types);
+                    var widenedTypes = ts.sameMap(type.types, function (t) { return t.flags & 24576 ? t : getWidenedTypeWithContext(t, unionContext_1); });
+                    return getUnionType(widenedTypes, ts.some(widenedTypes, isEmptyObjectType) ? 2 : 1);
                 }
                 if (isArrayType(type) || isTupleType(type)) {
                     return createTypeReference(type.target, ts.sameMap(type.typeArguments, getWidenedType));
@@ -40259,21 +33379,10 @@ var ts;
             }
             return type;
         }
-        /**
-         * Reports implicit any errors that occur as a result of widening 'null' and 'undefined'
-         * to 'any'. A call to reportWideningErrorsInType is normally accompanied by a call to
-         * getWidenedType. But in some cases getWidenedType is called without reporting errors
-         * (type argument inference is an example).
-         *
-         * The return value indicates whether an error was in fact reported. The particular circumstances
-         * are on a best effort basis. Currently, if the null or undefined that causes widening is inside
-         * an object literal property (arbitrarily deeply), this function reports an error. If no error is
-         * reported, reportImplicitAnyError is a suitable fallback to report a general error.
-         */
         function reportWideningErrorsInType(type) {
             var errorReported = false;
-            if (type.flags & 134217728 /* ContainsWideningType */) {
-                if (type.flags & 262144 /* Union */) {
+            if (type.flags & 134217728) {
+                if (type.flags & 262144) {
                     if (ts.some(type.types, isEmptyObjectType)) {
                         errorReported = true;
                     }
@@ -40298,7 +33407,7 @@ var ts;
                     for (var _d = 0, _e = getPropertiesOfObjectType(type); _d < _e.length; _d++) {
                         var p = _e[_d];
                         var t = getTypeOfSymbol(p);
-                        if (t.flags & 134217728 /* ContainsWideningType */) {
+                        if (t.flags & 134217728) {
                             if (!reportWideningErrorsInType(t)) {
                                 error(p.valueDeclaration, ts.Diagnostics.Object_literal_s_property_0_implicitly_has_an_1_type, symbolToString(p), typeToString(getWidenedType(t)));
                             }
@@ -40313,33 +33422,33 @@ var ts;
             var typeAsString = typeToString(getWidenedType(type));
             var diagnostic;
             switch (declaration.kind) {
-                case 200 /* BinaryExpression */:
-                case 152 /* PropertyDeclaration */:
-                case 151 /* PropertySignature */:
+                case 200:
+                case 152:
+                case 151:
                     diagnostic = ts.Diagnostics.Member_0_implicitly_has_an_1_type;
                     break;
-                case 149 /* Parameter */:
+                case 149:
                     diagnostic = declaration.dotDotDotToken ?
                         ts.Diagnostics.Rest_parameter_0_implicitly_has_an_any_type :
                         ts.Diagnostics.Parameter_0_implicitly_has_an_1_type;
                     break;
-                case 182 /* BindingElement */:
+                case 182:
                     diagnostic = ts.Diagnostics.Binding_element_0_implicitly_has_an_1_type;
                     break;
-                case 234 /* FunctionDeclaration */:
-                case 154 /* MethodDeclaration */:
-                case 153 /* MethodSignature */:
-                case 156 /* GetAccessor */:
-                case 157 /* SetAccessor */:
-                case 192 /* FunctionExpression */:
-                case 193 /* ArrowFunction */:
+                case 234:
+                case 154:
+                case 153:
+                case 156:
+                case 157:
+                case 192:
+                case 193:
                     if (!declaration.name) {
                         error(declaration, ts.Diagnostics.Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type, typeAsString);
                         return;
                     }
                     diagnostic = ts.Diagnostics._0_which_lacks_return_type_annotation_implicitly_has_an_1_return_type;
                     break;
-                case 177 /* MappedType */:
+                case 177:
                     error(declaration, ts.Diagnostics.Mapped_object_type_implicitly_has_an_any_template_type);
                     return;
                 default:
@@ -40348,8 +33457,7 @@ var ts;
             error(declaration, diagnostic, ts.declarationNameToString(ts.getNameOfDeclaration(declaration)), typeAsString);
         }
         function reportErrorsFromWidening(declaration, type) {
-            if (produceDiagnostics && noImplicitAny && type.flags & 134217728 /* ContainsWideningType */) {
-                // Report implicit any error within type if possible, otherwise report error on declaration
+            if (produceDiagnostics && noImplicitAny && type.flags & 134217728) {
                 if (!reportWideningErrorsInType(type)) {
                     reportImplicitAnyError(declaration, type);
                 }
@@ -40416,16 +33524,13 @@ var ts;
                 isFixed: inference.isFixed
             };
         }
-        // Return true if the given type could possibly reference a type parameter for which
-        // we perform type inference (i.e. a type parameter of a generic function). We cache
-        // results for union and intersection types for performance reasons.
         function couldContainTypeVariables(type) {
             var objectFlags = ts.getObjectFlags(type);
-            return !!(type.flags & 15794176 /* Instantiable */ ||
-                objectFlags & 4 /* Reference */ && ts.forEach(type.typeArguments, couldContainTypeVariables) ||
-                objectFlags & 16 /* Anonymous */ && type.symbol && type.symbol.flags & (16 /* Function */ | 8192 /* Method */ | 2048 /* TypeLiteral */ | 32 /* Class */) ||
-                objectFlags & 32 /* Mapped */ ||
-                type.flags & 786432 /* UnionOrIntersection */ && couldUnionOrIntersectionContainTypeVariables(type));
+            return !!(type.flags & 15794176 ||
+                objectFlags & 4 && ts.forEach(type.typeArguments, couldContainTypeVariables) ||
+                objectFlags & 16 && type.symbol && type.symbol.flags & (16 | 8192 | 2048 | 32) ||
+                objectFlags & 32 ||
+                type.flags & 786432 && couldUnionOrIntersectionContainTypeVariables(type));
         }
         function couldUnionOrIntersectionContainTypeVariables(type) {
             if (type.couldContainTypeVariables === undefined) {
@@ -40434,17 +33539,16 @@ var ts;
             return type.couldContainTypeVariables;
         }
         function isTypeParameterAtTopLevel(type, typeParameter) {
-            return type === typeParameter || !!(type.flags & 786432 /* UnionOrIntersection */) && ts.some(type.types, function (t) { return isTypeParameterAtTopLevel(t, typeParameter); });
+            return type === typeParameter || !!(type.flags & 786432) && ts.some(type.types, function (t) { return isTypeParameterAtTopLevel(t, typeParameter); });
         }
-        /** Create an object with properties named in the string literal type. Every property has type `any` */
         function createEmptyObjectTypeFromStringLiteral(type) {
             var members = ts.createSymbolTable();
             forEachType(type, function (t) {
-                if (!(t.flags & 64 /* StringLiteral */)) {
+                if (!(t.flags & 64)) {
                     return;
                 }
                 var name = ts.escapeLeadingUnderscores(t.value);
-                var literalProp = createSymbol(4 /* Property */, name);
+                var literalProp = createSymbol(4, name);
                 literalProp.type = anyType;
                 if (t.symbol) {
                     literalProp.declarations = t.symbol.declarations;
@@ -40452,15 +33556,9 @@ var ts;
                 }
                 members.set(name, literalProp);
             });
-            var indexInfo = type.flags & 4 /* String */ ? createIndexInfo(emptyObjectType, /*isReadonly*/ false) : undefined;
+            var indexInfo = type.flags & 4 ? createIndexInfo(emptyObjectType, false) : undefined;
             return createAnonymousType(undefined, members, ts.emptyArray, ts.emptyArray, indexInfo, undefined);
         }
-        /**
-         * Infer a suitable input type for a homomorphic mapped type { [P in keyof T]: X }. We construct
-         * an object type with the same set of properties as the source type, where the type of each
-         * property is computed by inferring from the source property type to X for the type
-         * variable T[P] (i.e. we treat the type T[P] as the type variable we're inferring for).
-         */
         function inferTypeForHomomorphicMappedType(source, target) {
             var key = source.id + "," + target.id;
             if (reverseMappedCache.has(key)) {
@@ -40473,18 +33571,16 @@ var ts;
         }
         function createReverseMappedType(source, target) {
             var properties = getPropertiesOfType(source);
-            if (properties.length === 0 && !getIndexInfoOfType(source, 0 /* String */)) {
+            if (properties.length === 0 && !getIndexInfoOfType(source, 0)) {
                 return undefined;
             }
-            // If any property contains context sensitive functions that have been skipped, the source type
-            // is incomplete and we can't infer a meaningful input type.
             for (var _i = 0, properties_4 = properties; _i < properties_4.length; _i++) {
                 var prop = properties_4[_i];
-                if (getTypeOfSymbol(prop).flags & 536870912 /* ContainsAnyFunctionType */) {
+                if (getTypeOfSymbol(prop).flags & 536870912) {
                     return undefined;
                 }
             }
-            var reversed = createObjectType(2048 /* ReverseMapped */ | 16 /* Anonymous */, /*symbol*/ undefined);
+            var reversed = createObjectType(2048 | 16, undefined);
             reversed.source = source;
             reversed.mappedType = target;
             return reversed;
@@ -40500,10 +33596,10 @@ var ts;
             return getTypeFromInference(inference);
         }
         function getUnmatchedProperty(source, target, requireOptionalProperties) {
-            var properties = target.flags & 524288 /* Intersection */ ? getPropertiesOfUnionOrIntersectionType(target) : getPropertiesOfObjectType(target);
+            var properties = target.flags & 524288 ? getPropertiesOfUnionOrIntersectionType(target) : getPropertiesOfObjectType(target);
             for (var _i = 0, properties_5 = properties; _i < properties_5.length; _i++) {
                 var targetProp = properties_5[_i];
-                if (requireOptionalProperties || !(targetProp.flags & 16777216 /* Optional */)) {
+                if (requireOptionalProperties || !(targetProp.flags & 16777216)) {
                     var sourceProp = getPropertyOfType(source, targetProp.escapedName);
                     if (!sourceProp) {
                         return targetProp;
@@ -40513,13 +33609,11 @@ var ts;
             return undefined;
         }
         function typesDefinitelyUnrelated(source, target) {
-            // Two tuple types with different arity are definitely unrelated.
-            // Two object types that each have a property that is unmatched in the other are definitely unrelated.
             return isTupleType(source) && isTupleType(target) && getTypeReferenceArity(source) !== getTypeReferenceArity(target) ||
-                !!getUnmatchedProperty(source, target, /*requireOptionalProperties*/ false) && !!getUnmatchedProperty(target, source, /*requireOptionalProperties*/ false);
+                !!getUnmatchedProperty(source, target, false) && !!getUnmatchedProperty(target, source, false);
         }
         function getTypeFromInference(inference) {
-            return inference.candidates ? getUnionType(inference.candidates, 2 /* Subtype */) :
+            return inference.candidates ? getUnionType(inference.candidates, 2) :
                 inference.contraCandidates ? getIntersectionType(inference.contraCandidates) :
                     emptyObjectType;
         }
@@ -40535,9 +33629,6 @@ var ts;
                     return;
                 }
                 if (source === wildcardType) {
-                    // We are inferring from an 'any' type. We want to infer this type for every type parameter
-                    // referenced in the target type, so we record it as the propagation type and infer from the
-                    // target to itself. Then, as we find candidates we substitute the propagation type.
                     var savePropagationType = propagationType;
                     propagationType = source;
                     inferFromTypes(target, target);
@@ -40545,8 +33636,6 @@ var ts;
                     return;
                 }
                 if (source.aliasSymbol && source.aliasTypeArguments && source.aliasSymbol === target.aliasSymbol) {
-                    // Source and target are types originating in the same generic type alias declaration.
-                    // Simply infer from source type arguments to target type arguments.
                     var sourceTypes = source.aliasTypeArguments;
                     var targetTypes = target.aliasTypeArguments;
                     for (var i = 0; i < sourceTypes.length; i++) {
@@ -40554,10 +33643,8 @@ var ts;
                     }
                     return;
                 }
-                if (source.flags & 262144 /* Union */ && target.flags & 262144 /* Union */ && !(source.flags & 512 /* EnumLiteral */ && target.flags & 512 /* EnumLiteral */) ||
-                    source.flags & 524288 /* Intersection */ && target.flags & 524288 /* Intersection */) {
-                    // Source and target are both unions or both intersections. If source and target
-                    // are the same type, just relate each constituent type to itself.
+                if (source.flags & 262144 && target.flags & 262144 && !(source.flags & 512 && target.flags & 512) ||
+                    source.flags & 524288 && target.flags & 524288) {
                     if (source === target) {
                         for (var _i = 0, _a = source.types; _i < _a.length; _i++) {
                             var t = _a[_i];
@@ -40565,12 +33652,6 @@ var ts;
                         }
                         return;
                     }
-                    // Find each source constituent type that has an identically matching target constituent
-                    // type, and for each such type infer from the type to itself. When inferring from a
-                    // type to itself we effectively find all type parameter occurrences within that type
-                    // and infer themselves as their type arguments. We have special handling for numeric
-                    // and string literals because the number and string types are not represented as unions
-                    // of all their possible values.
                     var matchingTypes = void 0;
                     for (var _b = 0, _c = source.types; _b < _c.length; _b++) {
                         var t = _c[_b];
@@ -40578,30 +33659,20 @@ var ts;
                             (matchingTypes || (matchingTypes = [])).push(t);
                             inferFromTypes(t, t);
                         }
-                        else if (t.flags & (128 /* NumberLiteral */ | 64 /* StringLiteral */)) {
+                        else if (t.flags & (128 | 64)) {
                             var b = getBaseTypeOfLiteralType(t);
                             if (typeIdenticalToSomeType(b, target.types)) {
                                 (matchingTypes || (matchingTypes = [])).push(t, b);
                             }
                         }
                     }
-                    // Next, to improve the quality of inferences, reduce the source and target types by
-                    // removing the identically matched constituents. For example, when inferring from
-                    // 'string | string[]' to 'string | T' we reduce the types to 'string[]' and 'T'.
                     if (matchingTypes) {
                         source = removeTypesFromUnionOrIntersection(source, matchingTypes);
                         target = removeTypesFromUnionOrIntersection(target, matchingTypes);
                     }
                 }
-                if (target.flags & 2162688 /* TypeVariable */) {
-                    // If target is a type parameter, make an inference, unless the source type contains
-                    // the anyFunctionType (the wildcard type that's used to avoid contextually typing functions).
-                    // Because the anyFunctionType is internal, it should not be exposed to the user by adding
-                    // it as an inference candidate. Hopefully, a better candidate will come along that does
-                    // not contain anyFunctionType when we come back to this argument for its second round
-                    // of inference. Also, we exclude inferences for silentNeverType (which is used as a wildcard
-                    // when constructing types from type parameters that had no inference candidates).
-                    if (source.flags & 536870912 /* ContainsAnyFunctionType */ || source === silentNeverType) {
+                if (target.flags & 2162688) {
+                    if (source.flags & 536870912 || source === silentNeverType) {
                         return;
                     }
                     var inference = getInferenceInfoForType(target);
@@ -40621,21 +33692,20 @@ var ts;
                                     inference.candidates = ts.append(inference.candidates, candidate);
                                 }
                             }
-                            if (!(priority & 8 /* ReturnType */) && target.flags & 65536 /* TypeParameter */ && !isTypeParameterAtTopLevel(originalTarget, target)) {
+                            if (!(priority & 8) && target.flags & 65536 && !isTypeParameterAtTopLevel(originalTarget, target)) {
                                 inference.topLevel = false;
                             }
                         }
                         return;
                     }
                 }
-                if (ts.getObjectFlags(source) & 4 /* Reference */ && ts.getObjectFlags(target) & 4 /* Reference */ && source.target === target.target) {
-                    // If source and target are references to the same generic type, infer from type arguments
+                if (ts.getObjectFlags(source) & 4 && ts.getObjectFlags(target) & 4 && source.target === target.target) {
                     var sourceTypes = source.typeArguments || ts.emptyArray;
                     var targetTypes = target.typeArguments || ts.emptyArray;
                     var count = sourceTypes.length < targetTypes.length ? sourceTypes.length : targetTypes.length;
                     var variances = getVariances(source.target);
                     for (var i = 0; i < count; i++) {
-                        if (i < variances.length && variances[i] === 2 /* Contravariant */) {
+                        if (i < variances.length && variances[i] === 2) {
                             inferFromContravariantTypes(sourceTypes[i], targetTypes[i]);
                         }
                         else {
@@ -40643,35 +33713,34 @@ var ts;
                         }
                     }
                 }
-                else if (source.flags & 1048576 /* Index */ && target.flags & 1048576 /* Index */) {
+                else if (source.flags & 1048576 && target.flags & 1048576) {
                     contravariant = !contravariant;
                     inferFromTypes(source.type, target.type);
                     contravariant = !contravariant;
                 }
-                else if ((isLiteralType(source) || source.flags & 4 /* String */) && target.flags & 1048576 /* Index */) {
+                else if ((isLiteralType(source) || source.flags & 4) && target.flags & 1048576) {
                     var empty = createEmptyObjectTypeFromStringLiteral(source);
                     contravariant = !contravariant;
                     var savePriority = priority;
-                    priority |= 16 /* LiteralKeyof */;
+                    priority |= 16;
                     inferFromTypes(empty, target.type);
                     priority = savePriority;
                     contravariant = !contravariant;
                 }
-                else if (source.flags & 2097152 /* IndexedAccess */ && target.flags & 2097152 /* IndexedAccess */) {
+                else if (source.flags & 2097152 && target.flags & 2097152) {
                     inferFromTypes(source.objectType, target.objectType);
                     inferFromTypes(source.indexType, target.indexType);
                 }
-                else if (source.flags & 4194304 /* Conditional */ && target.flags & 4194304 /* Conditional */) {
+                else if (source.flags & 4194304 && target.flags & 4194304) {
                     inferFromTypes(source.checkType, target.checkType);
                     inferFromTypes(source.extendsType, target.extendsType);
                     inferFromTypes(getTrueTypeFromConditionalType(source), getTrueTypeFromConditionalType(target));
                     inferFromTypes(getFalseTypeFromConditionalType(source), getFalseTypeFromConditionalType(target));
                 }
-                else if (target.flags & 786432 /* UnionOrIntersection */) {
+                else if (target.flags & 786432) {
                     var targetTypes = target.types;
                     var typeVariableCount = 0;
                     var typeVariable = void 0;
-                    // First infer to each type in union or intersection that isn't a type variable
                     for (var _d = 0, targetTypes_3 = targetTypes; _d < targetTypes_3.length; _d++) {
                         var t = targetTypes_3[_d];
                         if (getInferenceInfoForType(t)) {
@@ -40682,18 +33751,14 @@ var ts;
                             inferFromTypes(source, t);
                         }
                     }
-                    // Next, if target containings a single naked type variable, make a secondary inference to that type
-                    // variable. This gives meaningful results for union types in co-variant positions and intersection
-                    // types in contra-variant positions (such as callback parameters).
                     if (typeVariableCount === 1) {
                         var savePriority = priority;
-                        priority |= 1 /* NakedTypeVariable */;
+                        priority |= 1;
                         inferFromTypes(source, typeVariable);
                         priority = savePriority;
                     }
                 }
-                else if (source.flags & 262144 /* Union */) {
-                    // Source is a union or intersection type, infer from each constituent type
+                else if (source.flags & 262144) {
                     var sourceTypes = source.types;
                     for (var _e = 0, sourceTypes_3 = sourceTypes; _e < sourceTypes_3.length; _e++) {
                         var sourceType = sourceTypes_3[_e];
@@ -40701,21 +33766,17 @@ var ts;
                     }
                 }
                 else {
-                    if (!(priority & 32 /* NoConstraints */ && source.flags & (524288 /* Intersection */ | 15794176 /* Instantiable */))) {
+                    if (!(priority & 32 && source.flags & (524288 | 15794176))) {
                         source = getApparentType(source);
                     }
-                    if (source.flags & (131072 /* Object */ | 524288 /* Intersection */)) {
+                    if (source.flags & (131072 | 524288)) {
                         var key = source.id + "," + target.id;
                         if (visited && visited.get(key)) {
                             return;
                         }
                         (visited || (visited = ts.createMap())).set(key, true);
-                        // If we are already processing another target type with the same associated symbol (such as
-                        // an instantiation of the same generic type), we do not explore this target as it would yield
-                        // no further inferences. We exclude the static side of classes from this check since it shares
-                        // its symbol with the instance side which would lead to false positives.
-                        var isNonConstructorObject = target.flags & 131072 /* Object */ &&
-                            !(ts.getObjectFlags(target) & 16 /* Anonymous */ && target.symbol && target.symbol.flags & 32 /* Class */);
+                        var isNonConstructorObject = target.flags & 131072 &&
+                            !(ts.getObjectFlags(target) & 16 && target.symbol && target.symbol.flags & 32);
                         var symbol = isNonConstructorObject ? target.symbol : undefined;
                         if (symbol) {
                             if (ts.contains(symbolStack, symbol)) {
@@ -40732,7 +33793,7 @@ var ts;
                 }
             }
             function inferFromContravariantTypes(source, target) {
-                if (strictFunctionTypes || priority & 64 /* AlwaysStrict */) {
+                if (strictFunctionTypes || priority & 64) {
                     contravariant = !contravariant;
                     inferFromTypes(source, target);
                     contravariant = !contravariant;
@@ -40742,7 +33803,7 @@ var ts;
                 }
             }
             function getInferenceInfoForType(type) {
-                if (type.flags & 2162688 /* TypeVariable */) {
+                if (type.flags & 2162688) {
                     for (var _i = 0, inferences_1 = inferences; _i < inferences_1.length; _i++) {
                         var inference = inferences_1[_i];
                         if (type === inference.typeParameter) {
@@ -40754,46 +33815,37 @@ var ts;
             }
             function inferFromObjectTypes(source, target) {
                 if (isGenericMappedType(source) && isGenericMappedType(target)) {
-                    // The source and target types are generic types { [P in S]: X } and { [P in T]: Y }, so we infer
-                    // from S to T and from X to Y.
                     inferFromTypes(getConstraintTypeFromMappedType(source), getConstraintTypeFromMappedType(target));
                     inferFromTypes(getTemplateTypeFromMappedType(source), getTemplateTypeFromMappedType(target));
                 }
-                if (ts.getObjectFlags(target) & 32 /* Mapped */) {
+                if (ts.getObjectFlags(target) & 32) {
                     var constraintType = getConstraintTypeFromMappedType(target);
-                    if (constraintType.flags & 1048576 /* Index */) {
-                        // We're inferring from some source type S to a homomorphic mapped type { [P in keyof T]: X },
-                        // where T is a type variable. Use inferTypeForHomomorphicMappedType to infer a suitable source
-                        // type and then make a secondary inference from that type to T. We make a secondary inference
-                        // such that direct inferences to T get priority over inferences to Partial<T>, for example.
+                    if (constraintType.flags & 1048576) {
                         var inference = getInferenceInfoForType(constraintType.type);
                         if (inference && !inference.isFixed) {
                             var inferredType = inferTypeForHomomorphicMappedType(source, target);
                             if (inferredType) {
                                 var savePriority = priority;
-                                priority |= 2 /* HomomorphicMappedType */;
+                                priority |= 2;
                                 inferFromTypes(inferredType, inference.typeParameter);
                                 priority = savePriority;
                             }
                         }
                         return;
                     }
-                    if (constraintType.flags & 65536 /* TypeParameter */) {
-                        // We're inferring from some source type S to a mapped type { [P in T]: X }, where T is a type
-                        // parameter. Infer from 'keyof S' to T and infer from a union of each property type in S to X.
+                    if (constraintType.flags & 65536) {
                         var savePriority = priority;
-                        priority |= 4 /* MappedTypeConstraint */;
+                        priority |= 4;
                         inferFromTypes(getIndexType(source), constraintType);
                         priority = savePriority;
                         inferFromTypes(getUnionType(ts.map(getPropertiesOfType(source), getTypeOfSymbol)), getTemplateTypeFromMappedType(target));
                         return;
                     }
                 }
-                // Infer from the members of source and target only if the two types are possibly related
                 if (!typesDefinitelyUnrelated(source, target)) {
                     inferFromProperties(source, target);
-                    inferFromSignatures(source, target, 0 /* Call */);
-                    inferFromSignatures(source, target, 1 /* Construct */);
+                    inferFromSignatures(source, target, 0);
+                    inferFromSignatures(source, target, 1);
                     inferFromIndexTypes(source, target);
                 }
             }
@@ -40829,19 +33881,19 @@ var ts;
                 }
             }
             function inferFromIndexTypes(source, target) {
-                var targetStringIndexType = getIndexTypeOfType(target, 0 /* String */);
+                var targetStringIndexType = getIndexTypeOfType(target, 0);
                 if (targetStringIndexType) {
-                    var sourceIndexType = getIndexTypeOfType(source, 0 /* String */) ||
-                        getImplicitIndexTypeOfType(source, 0 /* String */);
+                    var sourceIndexType = getIndexTypeOfType(source, 0) ||
+                        getImplicitIndexTypeOfType(source, 0);
                     if (sourceIndexType) {
                         inferFromTypes(sourceIndexType, targetStringIndexType);
                     }
                 }
-                var targetNumberIndexType = getIndexTypeOfType(target, 1 /* Number */);
+                var targetNumberIndexType = getIndexTypeOfType(target, 1);
                 if (targetNumberIndexType) {
-                    var sourceIndexType = getIndexTypeOfType(source, 1 /* Number */) ||
-                        getIndexTypeOfType(source, 0 /* String */) ||
-                        getImplicitIndexTypeOfType(source, 1 /* Number */);
+                    var sourceIndexType = getIndexTypeOfType(source, 1) ||
+                        getIndexTypeOfType(source, 0) ||
+                        getImplicitIndexTypeOfType(source, 1);
                     if (sourceIndexType) {
                         inferFromTypes(sourceIndexType, targetNumberIndexType);
                     }
@@ -40857,10 +33909,6 @@ var ts;
             }
             return false;
         }
-        /**
-         * Return a new union or intersection type computed by removing a given set of types
-         * from a given union or intersection type.
-         */
         function removeTypesFromUnionOrIntersection(type, typesToRemove) {
             var reducedTypes = [];
             for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
@@ -40869,46 +33917,38 @@ var ts;
                     reducedTypes.push(t);
                 }
             }
-            return type.flags & 262144 /* Union */ ? getUnionType(reducedTypes) : getIntersectionType(reducedTypes);
+            return type.flags & 262144 ? getUnionType(reducedTypes) : getIntersectionType(reducedTypes);
         }
         function hasPrimitiveConstraint(type) {
             var constraint = getConstraintOfTypeParameter(type);
-            return !!constraint && maybeTypeOfKind(constraint, 32764 /* Primitive */ | 1048576 /* Index */);
+            return !!constraint && maybeTypeOfKind(constraint, 32764 | 1048576);
         }
         function isObjectLiteralType(type) {
-            return !!(ts.getObjectFlags(type) & 128 /* ObjectLiteral */);
+            return !!(ts.getObjectFlags(type) & 128);
         }
         function widenObjectLiteralCandidates(candidates) {
             if (candidates.length > 1) {
                 var objectLiterals = ts.filter(candidates, isObjectLiteralType);
                 if (objectLiterals.length) {
-                    var objectLiteralsType = getWidenedType(getUnionType(objectLiterals, 2 /* Subtype */));
+                    var objectLiteralsType = getWidenedType(getUnionType(objectLiterals, 2));
                     return ts.concatenate(ts.filter(candidates, function (t) { return !isObjectLiteralType(t); }), [objectLiteralsType]);
                 }
             }
             return candidates;
         }
         function getContravariantInference(inference) {
-            return inference.priority & 28 /* PriorityImpliesCombination */ ? getIntersectionType(inference.contraCandidates) : getCommonSubtype(inference.contraCandidates);
+            return inference.priority & 28 ? getIntersectionType(inference.contraCandidates) : getCommonSubtype(inference.contraCandidates);
         }
         function getCovariantInference(inference, context, signature) {
-            // Extract all object literal types and replace them with a single widened and normalized type.
             var candidates = widenObjectLiteralCandidates(inference.candidates);
-            // We widen inferred literal types if
-            // all inferences were made to top-level occurrences of the type parameter, and
-            // the type parameter has no constraint or its constraint includes no primitive or literal types, and
-            // the type parameter was fixed during inference or does not occur at top-level in the return type.
             var primitiveConstraint = hasPrimitiveConstraint(inference.typeParameter);
             var widenLiteralTypes = !primitiveConstraint && inference.topLevel &&
                 (inference.isFixed || !isTypeParameterAtTopLevel(getReturnTypeOfSignature(signature), inference.typeParameter));
             var baseCandidates = primitiveConstraint ? ts.sameMap(candidates, getRegularTypeOfLiteralType) :
                 widenLiteralTypes ? ts.sameMap(candidates, getWidenedLiteralType) :
                     candidates;
-            // If all inferences were made from contravariant positions, infer a common subtype. Otherwise, if
-            // union types were requested or if all inferences were made from the return type position, infer a
-            // union type. Otherwise, infer a common supertype.
-            var unwidenedType = context.flags & 1 /* InferUnionTypes */ || inference.priority & 28 /* PriorityImpliesCombination */ ?
-                getUnionType(baseCandidates, 2 /* Subtype */) :
+            var unwidenedType = context.flags & 1 || inference.priority & 28 ?
+                getUnionType(baseCandidates, 2) :
                 getCommonSupertype(baseCandidates);
             return getWidenedType(unwidenedType);
         }
@@ -40920,34 +33960,23 @@ var ts;
                 if (signature) {
                     if (inference.candidates) {
                         inferredType = getCovariantInference(inference, context, signature);
-                        // If we have inferred 'never' but have contravariant candidates. To get a more specific type we
-                        // infer from the contravariant candidates instead.
-                        if (inferredType.flags & 32768 /* Never */ && inference.contraCandidates) {
+                        if (inferredType.flags & 32768 && inference.contraCandidates) {
                             inferredType = getContravariantInference(inference);
                         }
                     }
                     else if (inference.contraCandidates) {
-                        // We only have contravariant inferences, infer the best common subtype of those
                         inferredType = getContravariantInference(inference);
                     }
-                    else if (context.flags & 2 /* NoDefault */) {
-                        // We use silentNeverType as the wildcard that signals no inferences.
+                    else if (context.flags & 2) {
                         inferredType = silentNeverType;
                     }
                     else {
-                        // Infer either the default or the empty object type when no inferences were
-                        // made. It is important to remember that in this case, inference still
-                        // succeeds, meaning there is no error for not having inference candidates. An
-                        // inference error only occurs when there are *conflicting* candidates, i.e.
-                        // candidates with no common supertype.
                         var defaultType = getDefaultFromTypeParameter(inference.typeParameter);
                         if (defaultType) {
-                            // Instantiate the default type. Any forward reference to a type
-                            // parameter should be instantiated to the empty object type.
                             inferredType = instantiateType(defaultType, combineTypeMappers(createBackreferenceMapper(context.signature.typeParameters, index), context));
                         }
                         else {
-                            inferredType = getDefaultTypeArgumentType(!!(context.flags & 4 /* AnyDefault */));
+                            inferredType = getDefaultTypeArgumentType(!!(context.flags & 4));
                         }
                     }
                 }
@@ -40975,43 +34004,32 @@ var ts;
             }
             return result;
         }
-        // EXPRESSION TYPE CHECKING
         function getResolvedSymbol(node) {
             var links = getNodeLinks(node);
             if (!links.resolvedSymbol) {
                 links.resolvedSymbol = !ts.nodeIsMissing(node) &&
-                    resolveName(node, node.escapedText, 67216319 /* Value */ | 1048576 /* ExportValue */, ts.Diagnostics.Cannot_find_name_0, node, !ts.isWriteOnlyAccess(node), 
-                    /*excludeGlobals*/ false, ts.Diagnostics.Cannot_find_name_0_Did_you_mean_1) || unknownSymbol;
+                    resolveName(node, node.escapedText, 67216319 | 1048576, ts.Diagnostics.Cannot_find_name_0, node, !ts.isWriteOnlyAccess(node), false, ts.Diagnostics.Cannot_find_name_0_Did_you_mean_1) || unknownSymbol;
             }
             return links.resolvedSymbol;
         }
         function isInTypeQuery(node) {
-            // TypeScript 1.0 spec (April 2014): 3.6.3
-            // A type query consists of the keyword typeof followed by an expression.
-            // The expression is restricted to a single identifier or a sequence of identifiers separated by periods
-            return !!ts.findAncestor(node, function (n) { return n.kind === 165 /* TypeQuery */ ? true : n.kind === 71 /* Identifier */ || n.kind === 146 /* QualifiedName */ ? false : "quit"; });
-        }
-        // Return the flow cache key for a "dotted name" (i.e. a sequence of identifiers
-        // separated by dots). The key consists of the id of the symbol referenced by the
-        // leftmost identifier followed by zero or more property names separated by dots.
-        // The result is undefined if the reference isn't a dotted name. We prefix nodes
-        // occurring in an apparent type position with '@' because the control flow type
-        // of such nodes may be based on the apparent type instead of the declared type.
+            return !!ts.findAncestor(node, function (n) { return n.kind === 165 ? true : n.kind === 71 || n.kind === 146 ? false : "quit"; });
+        }
         function getFlowCacheKey(node) {
-            if (node.kind === 71 /* Identifier */) {
+            if (node.kind === 71) {
                 var symbol = getResolvedSymbol(node);
                 return symbol !== unknownSymbol ? (isConstraintPosition(node) ? "@" : "") + getSymbolId(symbol) : undefined;
             }
-            if (node.kind === 99 /* ThisKeyword */) {
+            if (node.kind === 99) {
                 return "0";
             }
-            if (node.kind === 185 /* PropertyAccessExpression */) {
+            if (node.kind === 185) {
                 var key = getFlowCacheKey(node.expression);
                 return key && key + "." + ts.idText(node.name);
             }
-            if (node.kind === 182 /* BindingElement */) {
+            if (node.kind === 182) {
                 var container = node.parent.parent;
-                var key = container.kind === 182 /* BindingElement */ ? getFlowCacheKey(container) : (container.initializer && getFlowCacheKey(container.initializer));
+                var key = container.kind === 182 ? getFlowCacheKey(container) : (container.initializer && getFlowCacheKey(container.initializer));
                 var text = getBindingElementNameText(node);
                 var result = key && text && (key + "." + text);
                 return result;
@@ -41020,18 +34038,17 @@ var ts;
         }
         function getBindingElementNameText(element) {
             var parent = element.parent;
-            if (parent.kind === 180 /* ObjectBindingPattern */) {
+            if (parent.kind === 180) {
                 var name = element.propertyName || element.name;
                 switch (name.kind) {
-                    case 71 /* Identifier */:
+                    case 71:
                         return ts.idText(name);
-                    case 147 /* ComputedPropertyName */:
+                    case 147:
                         return ts.isStringOrNumericLiteral(name.expression) ? name.expression.text : undefined;
-                    case 9 /* StringLiteral */:
-                    case 8 /* NumericLiteral */:
+                    case 9:
+                    case 8:
                         return name.text;
                     default:
-                        // Per types, array and object binding patterns remain, however they should never be present if propertyName is not defined
                         ts.Debug.fail("Unexpected name kind for binding element name");
                 }
             }
@@ -41041,28 +34058,28 @@ var ts;
         }
         function isMatchingReference(source, target) {
             switch (source.kind) {
-                case 71 /* Identifier */:
-                    return target.kind === 71 /* Identifier */ && getResolvedSymbol(source) === getResolvedSymbol(target) ||
-                        (target.kind === 232 /* VariableDeclaration */ || target.kind === 182 /* BindingElement */) &&
+                case 71:
+                    return target.kind === 71 && getResolvedSymbol(source) === getResolvedSymbol(target) ||
+                        (target.kind === 232 || target.kind === 182) &&
                             getExportSymbolOfValueSymbolIfExported(getResolvedSymbol(source)) === getSymbolOfNode(target);
-                case 99 /* ThisKeyword */:
-                    return target.kind === 99 /* ThisKeyword */;
-                case 97 /* SuperKeyword */:
-                    return target.kind === 97 /* SuperKeyword */;
-                case 185 /* PropertyAccessExpression */:
-                    return target.kind === 185 /* PropertyAccessExpression */ &&
+                case 99:
+                    return target.kind === 99;
+                case 97:
+                    return target.kind === 97;
+                case 185:
+                    return target.kind === 185 &&
                         source.name.escapedText === target.name.escapedText &&
                         isMatchingReference(source.expression, target.expression);
-                case 182 /* BindingElement */:
-                    if (target.kind !== 185 /* PropertyAccessExpression */)
+                case 182:
+                    if (target.kind !== 185)
                         return false;
                     var t = target;
                     if (t.name.escapedText !== getBindingElementNameText(source))
                         return false;
-                    if (source.parent.parent.kind === 182 /* BindingElement */ && isMatchingReference(source.parent.parent, t.expression)) {
+                    if (source.parent.parent.kind === 182 && isMatchingReference(source.parent.parent, t.expression)) {
                         return true;
                     }
-                    if (source.parent.parent.kind === 232 /* VariableDeclaration */) {
+                    if (source.parent.parent.kind === 232) {
                         var maybeId = source.parent.parent.initializer;
                         return !!maybeId && isMatchingReference(maybeId, t.expression);
                     }
@@ -41070,7 +34087,7 @@ var ts;
             return false;
         }
         function containsMatchingReference(source, target) {
-            while (source.kind === 185 /* PropertyAccessExpression */) {
+            while (source.kind === 185) {
                 source = source.expression;
                 if (isMatchingReference(source, target)) {
                     return true;
@@ -41078,31 +34095,27 @@ var ts;
             }
             return false;
         }
-        // Return true if target is a property access xxx.yyy, source is a property access xxx.zzz, the declared
-        // type of xxx is a union type, and yyy is a property that is possibly a discriminant. We consider a property
-        // a possible discriminant if its type differs in the constituents of containing union type, and if every
-        // choice is a unit type or a union of unit types.
         function containsMatchingReferenceDiscriminant(source, target) {
-            return target.kind === 185 /* PropertyAccessExpression */ &&
+            return target.kind === 185 &&
                 containsMatchingReference(source, target.expression) &&
                 isDiscriminantProperty(getDeclaredTypeOfReference(target.expression), target.name.escapedText);
         }
         function getDeclaredTypeOfReference(expr) {
-            if (expr.kind === 71 /* Identifier */) {
+            if (expr.kind === 71) {
                 return getTypeOfSymbol(getResolvedSymbol(expr));
             }
-            if (expr.kind === 185 /* PropertyAccessExpression */) {
+            if (expr.kind === 185) {
                 var type = getDeclaredTypeOfReference(expr.expression);
                 return type && getTypeOfPropertyOfType(type, expr.name.escapedText);
             }
             return undefined;
         }
         function isDiscriminantProperty(type, name) {
-            if (type && type.flags & 262144 /* Union */) {
+            if (type && type.flags & 262144) {
                 var prop = getUnionOrIntersectionProperty(type, name);
-                if (prop && ts.getCheckFlags(prop) & 2 /* SyntheticProperty */) {
+                if (prop && ts.getCheckFlags(prop) & 2) {
                     if (prop.isDiscriminantProperty === undefined) {
-                        prop.isDiscriminantProperty = !!(prop.checkFlags & 32 /* HasNonUniformType */) && isLiteralType(getTypeOfSymbol(prop));
+                        prop.isDiscriminantProperty = !!(prop.checkFlags & 32) && isLiteralType(getTypeOfSymbol(prop));
                     }
                     return prop.isDiscriminantProperty;
                 }
@@ -41135,7 +34148,7 @@ var ts;
                     }
                 }
             }
-            if (callExpression.expression.kind === 185 /* PropertyAccessExpression */ &&
+            if (callExpression.expression.kind === 185 &&
                 isOrContainsMatchingReference(reference, callExpression.expression.expression)) {
                 return true;
             }
@@ -41149,7 +34162,7 @@ var ts;
             return flow.id;
         }
         function typeMaybeAssignableTo(source, target) {
-            if (!(source.flags & 262144 /* Union */)) {
+            if (!(source.flags & 262144)) {
                 return isTypeAssignableTo(source, target);
             }
             for (var _i = 0, _a = source.types; _i < _a.length; _i++) {
@@ -41160,23 +34173,20 @@ var ts;
             }
             return false;
         }
-        // Remove those constituent types of declaredType to which no constituent type of assignedType is assignable.
-        // For example, when a variable of type number | string | boolean is assigned a value of type number | boolean,
-        // we remove type string.
         function getAssignmentReducedType(declaredType, assignedType) {
             if (declaredType !== assignedType) {
-                if (assignedType.flags & 32768 /* Never */) {
+                if (assignedType.flags & 32768) {
                     return assignedType;
                 }
                 var reducedType = filterType(declaredType, function (t) { return typeMaybeAssignableTo(assignedType, t); });
-                if (!(reducedType.flags & 32768 /* Never */)) {
+                if (!(reducedType.flags & 32768)) {
                     return reducedType;
                 }
             }
             return declaredType;
         }
         function getTypeFactsOfTypes(types) {
-            var result = 0 /* None */;
+            var result = 0;
             for (var _i = 0, types_12 = types; _i < types_12.length; _i++) {
                 var t = types_12[_i];
                 result |= getTypeFacts(t);
@@ -41184,64 +34194,62 @@ var ts;
             return result;
         }
         function isFunctionObjectType(type) {
-            // We do a quick check for a "bind" property before performing the more expensive subtype
-            // check. This gives us a quicker out in the common case where an object type is not a function.
             var resolved = resolveStructuredTypeMembers(type);
             return !!(resolved.callSignatures.length || resolved.constructSignatures.length ||
                 resolved.members.get("bind") && isTypeSubtypeOf(type, globalFunctionType));
         }
         function getTypeFacts(type) {
             var flags = type.flags;
-            if (flags & 4 /* String */) {
-                return strictNullChecks ? 4079361 /* StringStrictFacts */ : 4194049 /* StringFacts */;
+            if (flags & 4) {
+                return strictNullChecks ? 4079361 : 4194049;
             }
-            if (flags & 64 /* StringLiteral */) {
+            if (flags & 64) {
                 var isEmpty = type.value === "";
                 return strictNullChecks ?
-                    isEmpty ? 3030785 /* EmptyStringStrictFacts */ : 1982209 /* NonEmptyStringStrictFacts */ :
-                    isEmpty ? 3145473 /* EmptyStringFacts */ : 4194049 /* NonEmptyStringFacts */;
+                    isEmpty ? 3030785 : 1982209 :
+                    isEmpty ? 3145473 : 4194049;
             }
-            if (flags & (8 /* Number */ | 32 /* Enum */)) {
-                return strictNullChecks ? 4079234 /* NumberStrictFacts */ : 4193922 /* NumberFacts */;
+            if (flags & (8 | 32)) {
+                return strictNullChecks ? 4079234 : 4193922;
             }
-            if (flags & 128 /* NumberLiteral */) {
+            if (flags & 128) {
                 var isZero = type.value === 0;
                 return strictNullChecks ?
-                    isZero ? 3030658 /* ZeroStrictFacts */ : 1982082 /* NonZeroStrictFacts */ :
-                    isZero ? 3145346 /* ZeroFacts */ : 4193922 /* NonZeroFacts */;
+                    isZero ? 3030658 : 1982082 :
+                    isZero ? 3145346 : 4193922;
             }
-            if (flags & 16 /* Boolean */) {
-                return strictNullChecks ? 4078980 /* BooleanStrictFacts */ : 4193668 /* BooleanFacts */;
+            if (flags & 16) {
+                return strictNullChecks ? 4078980 : 4193668;
             }
-            if (flags & 272 /* BooleanLike */) {
+            if (flags & 272) {
                 return strictNullChecks ?
-                    type === falseType ? 3030404 /* FalseStrictFacts */ : 1981828 /* TrueStrictFacts */ :
-                    type === falseType ? 3145092 /* FalseFacts */ : 4193668 /* TrueFacts */;
+                    type === falseType ? 3030404 : 1981828 :
+                    type === falseType ? 3145092 : 4193668;
             }
-            if (flags & 131072 /* Object */) {
+            if (flags & 131072) {
                 return isFunctionObjectType(type) ?
-                    strictNullChecks ? 1970144 /* FunctionStrictFacts */ : 4181984 /* FunctionFacts */ :
-                    strictNullChecks ? 1972176 /* ObjectStrictFacts */ : 4184016 /* ObjectFacts */;
+                    strictNullChecks ? 1970144 : 4181984 :
+                    strictNullChecks ? 1972176 : 4184016;
             }
-            if (flags & (4096 /* Void */ | 8192 /* Undefined */)) {
-                return 2457472 /* UndefinedFacts */;
+            if (flags & (4096 | 8192)) {
+                return 2457472;
             }
-            if (flags & 16384 /* Null */) {
-                return 2340752 /* NullFacts */;
+            if (flags & 16384) {
+                return 2340752;
             }
-            if (flags & 3072 /* ESSymbolLike */) {
-                return strictNullChecks ? 1981320 /* SymbolStrictFacts */ : 4193160 /* SymbolFacts */;
+            if (flags & 3072) {
+                return strictNullChecks ? 1981320 : 4193160;
             }
-            if (flags & 16777216 /* NonPrimitive */) {
-                return strictNullChecks ? 1972176 /* ObjectStrictFacts */ : 4184016 /* ObjectFacts */;
+            if (flags & 16777216) {
+                return strictNullChecks ? 1972176 : 4184016;
             }
-            if (flags & 15794176 /* Instantiable */) {
+            if (flags & 15794176) {
                 return getTypeFacts(getBaseConstraintOfType(type) || emptyObjectType);
             }
-            if (flags & 786432 /* UnionOrIntersection */) {
+            if (flags & 786432) {
                 return getTypeFactsOfTypes(type.types);
             }
-            return 4194303 /* All */;
+            return 4194303;
         }
         function getTypeWithFacts(type, include) {
             return filterType(type, function (t) { return (getTypeFacts(t) & include) !== 0; });
@@ -41249,35 +34257,35 @@ var ts;
         function getTypeWithDefault(type, defaultExpression) {
             if (defaultExpression) {
                 var defaultType = getTypeOfExpression(defaultExpression);
-                return getUnionType([getTypeWithFacts(type, 131072 /* NEUndefined */), defaultType]);
+                return getUnionType([getTypeWithFacts(type, 131072), defaultType]);
             }
             return type;
         }
         function getTypeOfDestructuredProperty(type, name) {
             var text = ts.getTextOfPropertyName(name);
             return getConstraintForLocation(getTypeOfPropertyOfType(type, text), name) ||
-                isNumericLiteralName(text) && getIndexTypeOfType(type, 1 /* Number */) ||
-                getIndexTypeOfType(type, 0 /* String */) ||
+                isNumericLiteralName(text) && getIndexTypeOfType(type, 1) ||
+                getIndexTypeOfType(type, 0) ||
                 errorType;
         }
         function getTypeOfDestructuredArrayElement(type, index) {
             return isTupleLikeType(type) && getTypeOfPropertyOfType(type, "" + index) ||
-                checkIteratedTypeOrElementType(type, /*errorNode*/ undefined, /*allowStringInput*/ false, /*allowAsyncIterables*/ false) ||
+                checkIteratedTypeOrElementType(type, undefined, false, false) ||
                 errorType;
         }
         function getTypeOfDestructuredSpreadExpression(type) {
-            return createArrayType(checkIteratedTypeOrElementType(type, /*errorNode*/ undefined, /*allowStringInput*/ false, /*allowAsyncIterables*/ false) || errorType);
+            return createArrayType(checkIteratedTypeOrElementType(type, undefined, false, false) || errorType);
         }
         function getAssignedTypeOfBinaryExpression(node) {
-            var isDestructuringDefaultAssignment = node.parent.kind === 183 /* ArrayLiteralExpression */ && isDestructuringAssignmentTarget(node.parent) ||
-                node.parent.kind === 270 /* PropertyAssignment */ && isDestructuringAssignmentTarget(node.parent.parent);
+            var isDestructuringDefaultAssignment = node.parent.kind === 183 && isDestructuringAssignmentTarget(node.parent) ||
+                node.parent.kind === 270 && isDestructuringAssignmentTarget(node.parent.parent);
             return isDestructuringDefaultAssignment ?
                 getTypeWithDefault(getAssignedType(node), node.right) :
                 getTypeOfExpression(node.right);
         }
         function isDestructuringAssignmentTarget(parent) {
-            return parent.parent.kind === 200 /* BinaryExpression */ && parent.parent.left === parent ||
-                parent.parent.kind === 222 /* ForOfStatement */ && parent.parent.initializer === parent;
+            return parent.parent.kind === 200 && parent.parent.left === parent ||
+                parent.parent.kind === 222 && parent.parent.initializer === parent;
         }
         function getAssignedTypeOfArrayLiteralElement(node, element) {
             return getTypeOfDestructuredArrayElement(getAssignedType(node), node.elements.indexOf(element));
@@ -41294,21 +34302,21 @@ var ts;
         function getAssignedType(node) {
             var parent = node.parent;
             switch (parent.kind) {
-                case 221 /* ForInStatement */:
+                case 221:
                     return stringType;
-                case 222 /* ForOfStatement */:
+                case 222:
                     return checkRightHandSideOfForOf(parent.expression, parent.awaitModifier) || errorType;
-                case 200 /* BinaryExpression */:
+                case 200:
                     return getAssignedTypeOfBinaryExpression(parent);
-                case 194 /* DeleteExpression */:
+                case 194:
                     return undefinedType;
-                case 183 /* ArrayLiteralExpression */:
+                case 183:
                     return getAssignedTypeOfArrayLiteralElement(parent, node);
-                case 204 /* SpreadElement */:
+                case 204:
                     return getAssignedTypeOfSpreadExpression(parent);
-                case 270 /* PropertyAssignment */:
+                case 270:
                     return getAssignedTypeOfPropertyAssignment(parent);
-                case 271 /* ShorthandPropertyAssignment */:
+                case 271:
                     return getAssignedTypeOfShorthandPropertyAssignment(parent);
             }
             return errorType;
@@ -41316,7 +34324,7 @@ var ts;
         function getInitialTypeOfBindingElement(node) {
             var pattern = node.parent;
             var parentType = getInitialType(pattern.parent);
-            var type = pattern.kind === 180 /* ObjectBindingPattern */ ?
+            var type = pattern.kind === 180 ?
                 getTypeOfDestructuredProperty(parentType, node.propertyName || node.name) :
                 !node.dotDotDotToken ?
                     getTypeOfDestructuredArrayElement(parentType, pattern.elements.indexOf(node)) :
@@ -41324,9 +34332,6 @@ var ts;
             return getTypeWithDefault(type, node.initializer);
         }
         function getTypeOfInitializer(node) {
-            // Return the cached type if one is available. If the type of the variable was inferred
-            // from its initializer, we'll already have cached the type. Otherwise we compute it now
-            // without caching such that transient types are reflected.
             var links = getNodeLinks(node);
             return links.resolvedType || getTypeOfExpression(node);
         }
@@ -41334,39 +34339,39 @@ var ts;
             if (node.initializer) {
                 return getTypeOfInitializer(node.initializer);
             }
-            if (node.parent.parent.kind === 221 /* ForInStatement */) {
+            if (node.parent.parent.kind === 221) {
                 return stringType;
             }
-            if (node.parent.parent.kind === 222 /* ForOfStatement */) {
+            if (node.parent.parent.kind === 222) {
                 return checkRightHandSideOfForOf(node.parent.parent.expression, node.parent.parent.awaitModifier) || errorType;
             }
             return errorType;
         }
         function getInitialType(node) {
-            return node.kind === 232 /* VariableDeclaration */ ?
+            return node.kind === 232 ?
                 getInitialTypeOfVariableDeclaration(node) :
                 getInitialTypeOfBindingElement(node);
         }
         function getInitialOrAssignedType(node) {
-            return node.kind === 232 /* VariableDeclaration */ || node.kind === 182 /* BindingElement */ ?
+            return node.kind === 232 || node.kind === 182 ?
                 getInitialType(node) :
                 getAssignedType(node);
         }
         function isEmptyArrayAssignment(node) {
-            return node.kind === 232 /* VariableDeclaration */ && node.initializer &&
+            return node.kind === 232 && node.initializer &&
                 isEmptyArrayLiteral(node.initializer) ||
-                node.kind !== 182 /* BindingElement */ && node.parent.kind === 200 /* BinaryExpression */ &&
+                node.kind !== 182 && node.parent.kind === 200 &&
                     isEmptyArrayLiteral(node.parent.right);
         }
         function getReferenceCandidate(node) {
             switch (node.kind) {
-                case 191 /* ParenthesizedExpression */:
+                case 191:
                     return getReferenceCandidate(node.expression);
-                case 200 /* BinaryExpression */:
+                case 200:
                     switch (node.operatorToken.kind) {
-                        case 58 /* EqualsToken */:
+                        case 58:
                             return getReferenceCandidate(node.left);
-                        case 26 /* CommaToken */:
+                        case 26:
                             return getReferenceCandidate(node.right);
                     }
             }
@@ -41374,13 +34379,13 @@ var ts;
         }
         function getReferenceRoot(node) {
             var parent = node.parent;
-            return parent.kind === 191 /* ParenthesizedExpression */ ||
-                parent.kind === 200 /* BinaryExpression */ && parent.operatorToken.kind === 58 /* EqualsToken */ && parent.left === node ||
-                parent.kind === 200 /* BinaryExpression */ && parent.operatorToken.kind === 26 /* CommaToken */ && parent.right === node ?
+            return parent.kind === 191 ||
+                parent.kind === 200 && parent.operatorToken.kind === 58 && parent.left === node ||
+                parent.kind === 200 && parent.operatorToken.kind === 26 && parent.right === node ?
                 getReferenceRoot(parent) : node;
         }
         function getTypeOfSwitchClause(clause) {
-            if (clause.kind === 266 /* CaseClause */) {
+            if (clause.kind === 266) {
                 return getRegularTypeOfLiteralType(getTypeOfExpression(clause.expression));
             }
             return neverType;
@@ -41397,13 +34402,13 @@ var ts;
             return links.switchTypes;
         }
         function eachTypeContainedIn(source, types) {
-            return source.flags & 262144 /* Union */ ? !ts.forEach(source.types, function (t) { return !ts.contains(types, t); }) : ts.contains(types, source);
+            return source.flags & 262144 ? !ts.forEach(source.types, function (t) { return !ts.contains(types, t); }) : ts.contains(types, source);
         }
         function isTypeSubsetOf(source, target) {
-            return source === target || target.flags & 262144 /* Union */ && isTypeSubsetOfUnion(source, target);
+            return source === target || target.flags & 262144 && isTypeSubsetOfUnion(source, target);
         }
         function isTypeSubsetOfUnion(source, target) {
-            if (source.flags & 262144 /* Union */) {
+            if (source.flags & 262144) {
                 for (var _i = 0, _a = source.types; _i < _a.length; _i++) {
                     var t = _a[_i];
                     if (!containsType(target.types, t)) {
@@ -41412,27 +34417,27 @@ var ts;
                 }
                 return true;
             }
-            if (source.flags & 512 /* EnumLiteral */ && getBaseTypeOfEnumLiteralType(source) === target) {
+            if (source.flags & 512 && getBaseTypeOfEnumLiteralType(source) === target) {
                 return true;
             }
             return containsType(target.types, source);
         }
         function forEachType(type, f) {
-            return type.flags & 262144 /* Union */ ? ts.forEach(type.types, f) : f(type);
+            return type.flags & 262144 ? ts.forEach(type.types, f) : f(type);
         }
         function filterType(type, f) {
-            if (type.flags & 262144 /* Union */) {
+            if (type.flags & 262144) {
                 var types = type.types;
                 var filtered = ts.filter(types, f);
-                return filtered === types ? type : getUnionTypeFromSortedList(filtered, type.flags & 67108864 /* UnionOfUnitTypes */);
+                return filtered === types ? type : getUnionTypeFromSortedList(filtered, type.flags & 67108864);
             }
             return f(type) ? type : neverType;
         }
         function mapType(type, mapper, noReductions) {
-            if (type.flags & 32768 /* Never */) {
+            if (type.flags & 32768) {
                 return type;
             }
-            if (!(type.flags & 262144 /* Union */)) {
+            if (!(type.flags & 262144)) {
                 return mapper(type);
             }
             var types = type.types;
@@ -41453,20 +34458,17 @@ var ts;
                     }
                 }
             }
-            return mappedTypes ? getUnionType(mappedTypes, noReductions ? 0 /* None */ : 1 /* Literal */) : mappedType;
+            return mappedTypes ? getUnionType(mappedTypes, noReductions ? 0 : 1) : mappedType;
         }
         function extractTypesOfKind(type, kind) {
             return filterType(type, function (t) { return (t.flags & kind) !== 0; });
         }
-        // Return a new type in which occurrences of the string and number primitive types in
-        // typeWithPrimitives have been replaced with occurrences of string literals and numeric
-        // literals in typeWithLiterals, respectively.
         function replacePrimitivesWithLiterals(typeWithPrimitives, typeWithLiterals) {
-            if (isTypeSubsetOf(stringType, typeWithPrimitives) && maybeTypeOfKind(typeWithLiterals, 64 /* StringLiteral */) ||
-                isTypeSubsetOf(numberType, typeWithPrimitives) && maybeTypeOfKind(typeWithLiterals, 128 /* NumberLiteral */)) {
+            if (isTypeSubsetOf(stringType, typeWithPrimitives) && maybeTypeOfKind(typeWithLiterals, 64) ||
+                isTypeSubsetOf(numberType, typeWithPrimitives) && maybeTypeOfKind(typeWithLiterals, 128)) {
                 return mapType(typeWithPrimitives, function (t) {
-                    return t.flags & 4 /* String */ ? extractTypesOfKind(typeWithLiterals, 4 /* String */ | 64 /* StringLiteral */) :
-                        t.flags & 8 /* Number */ ? extractTypesOfKind(typeWithLiterals, 8 /* Number */ | 128 /* NumberLiteral */) :
+                    return t.flags & 4 ? extractTypesOfKind(typeWithLiterals, 4 | 64) :
+                        t.flags & 8 ? extractTypesOfKind(typeWithLiterals, 8 | 128) :
                             t;
                 });
             }
@@ -41481,48 +34483,40 @@ var ts;
         function createFlowType(type, incomplete) {
             return incomplete ? { flags: 0, type: type } : type;
         }
-        // An evolving array type tracks the element types that have so far been seen in an
-        // 'x.push(value)' or 'x[n] = value' operation along the control flow graph. Evolving
-        // array types are ultimately converted into manifest array types (using getFinalArrayType)
-        // and never escape the getFlowTypeOfReference function.
         function createEvolvingArrayType(elementType) {
-            var result = createObjectType(256 /* EvolvingArray */);
+            var result = createObjectType(256);
             result.elementType = elementType;
             return result;
         }
         function getEvolvingArrayType(elementType) {
             return evolvingArrayTypes[elementType.id] || (evolvingArrayTypes[elementType.id] = createEvolvingArrayType(elementType));
         }
-        // When adding evolving array element types we do not perform subtype reduction. Instead,
-        // we defer subtype reduction until the evolving array type is finalized into a manifest
-        // array type.
         function addEvolvingArrayElementType(evolvingArrayType, node) {
             var elementType = getBaseTypeOfLiteralType(getContextFreeTypeOfExpression(node));
             return isTypeSubsetOf(elementType, evolvingArrayType.elementType) ? evolvingArrayType : getEvolvingArrayType(getUnionType([evolvingArrayType.elementType, elementType]));
         }
         function createFinalArrayType(elementType) {
-            return elementType.flags & 32768 /* Never */ ?
+            return elementType.flags & 32768 ?
                 autoArrayType :
-                createArrayType(elementType.flags & 262144 /* Union */ ?
-                    getUnionType(elementType.types, 2 /* Subtype */) :
+                createArrayType(elementType.flags & 262144 ?
+                    getUnionType(elementType.types, 2) :
                     elementType);
         }
-        // We perform subtype reduction upon obtaining the final array type from an evolving array type.
         function getFinalArrayType(evolvingArrayType) {
             return evolvingArrayType.finalArrayType || (evolvingArrayType.finalArrayType = createFinalArrayType(evolvingArrayType.elementType));
         }
         function finalizeEvolvingArrayType(type) {
-            return ts.getObjectFlags(type) & 256 /* EvolvingArray */ ? getFinalArrayType(type) : type;
+            return ts.getObjectFlags(type) & 256 ? getFinalArrayType(type) : type;
         }
         function getElementTypeOfEvolvingArrayType(type) {
-            return ts.getObjectFlags(type) & 256 /* EvolvingArray */ ? type.elementType : neverType;
+            return ts.getObjectFlags(type) & 256 ? type.elementType : neverType;
         }
         function isEvolvingArrayTypeList(types) {
             var hasEvolvingArrayType = false;
             for (var _i = 0, types_14 = types; _i < types_14.length; _i++) {
                 var t = types_14[_i];
-                if (!(t.flags & 32768 /* Never */)) {
-                    if (!(ts.getObjectFlags(t) & 256 /* EvolvingArray */)) {
+                if (!(t.flags & 32768)) {
+                    if (!(ts.getObjectFlags(t) & 256)) {
                         return false;
                     }
                     hasEvolvingArrayType = true;
@@ -41530,28 +34524,23 @@ var ts;
             }
             return hasEvolvingArrayType;
         }
-        // At flow control branch or loop junctions, if the type along every antecedent code path
-        // is an evolving array type, we construct a combined evolving array type. Otherwise we
-        // finalize all evolving array types.
         function getUnionOrEvolvingArrayType(types, subtypeReduction) {
             return isEvolvingArrayTypeList(types) ?
                 getEvolvingArrayType(getUnionType(ts.map(types, getElementTypeOfEvolvingArrayType))) :
                 getUnionType(ts.sameMap(types, finalizeEvolvingArrayType), subtypeReduction);
         }
-        // Return true if the given node is 'x' in an 'x.length', x.push(value)', 'x.unshift(value)' or
-        // 'x[n] = value' operation, where 'n' is an expression of type any, undefined, or a number-like type.
         function isEvolvingArrayOperationTarget(node) {
             var root = getReferenceRoot(node);
             var parent = root.parent;
-            var isLengthPushOrUnshift = parent.kind === 185 /* PropertyAccessExpression */ && (parent.name.escapedText === "length" ||
-                parent.parent.kind === 187 /* CallExpression */ && ts.isPushOrUnshiftIdentifier(parent.name));
-            var isElementAssignment = parent.kind === 186 /* ElementAccessExpression */ &&
+            var isLengthPushOrUnshift = parent.kind === 185 && (parent.name.escapedText === "length" ||
+                parent.parent.kind === 187 && ts.isPushOrUnshiftIdentifier(parent.name));
+            var isElementAssignment = parent.kind === 186 &&
                 parent.expression === root &&
-                parent.parent.kind === 200 /* BinaryExpression */ &&
-                parent.parent.operatorToken.kind === 58 /* EqualsToken */ &&
+                parent.parent.kind === 200 &&
+                parent.parent.operatorToken.kind === 58 &&
                 parent.parent.left === parent &&
                 !ts.isAssignmentTarget(parent.parent) &&
-                isTypeAssignableToKind(getTypeOfExpression(parent.argumentExpression), 168 /* NumberLike */);
+                isTypeAssignableToKind(getTypeOfExpression(parent.argumentExpression), 168);
             return isLengthPushOrUnshift || isElementAssignment;
         }
         function maybeTypePredicateCall(node) {
@@ -41562,11 +34551,11 @@ var ts;
             return links.maybeTypePredicate;
         }
         function getMaybeTypePredicate(node) {
-            if (node.expression.kind !== 97 /* SuperKeyword */) {
+            if (node.expression.kind !== 97) {
                 var funcType = checkNonNullExpression(node.expression);
                 if (funcType !== silentNeverType) {
                     var apparentType = getApparentType(funcType);
-                    return apparentType !== errorType && ts.some(getSignaturesOfType(apparentType, 0 /* Call */), signatureHasTypePredicate);
+                    return apparentType !== errorType && ts.some(getSignaturesOfType(apparentType, 0), signatureHasTypePredicate);
                 }
             }
             return false;
@@ -41584,25 +34573,19 @@ var ts;
             if (flowAnalysisDisabled) {
                 return errorType;
             }
-            if (!reference.flowNode || !couldBeUninitialized && !(declaredType.flags & 33492479 /* Narrowable */)) {
+            if (!reference.flowNode || !couldBeUninitialized && !(declaredType.flags & 33492479)) {
                 return declaredType;
             }
             var sharedFlowStart = sharedFlowCount;
             var evolvedType = getTypeFromFlowType(getTypeAtFlowNode(reference.flowNode));
             sharedFlowCount = sharedFlowStart;
-            // When the reference is 'x' in an 'x.length', 'x.push(value)', 'x.unshift(value)' or x[n] = value' operation,
-            // we give type 'any[]' to 'x' instead of using the type determined by control flow analysis such that operations
-            // on empty arrays are possible without implicit any errors and new element types can be inferred without
-            // type mismatch errors.
-            var resultType = ts.getObjectFlags(evolvedType) & 256 /* EvolvingArray */ && isEvolvingArrayOperationTarget(reference) ? anyArrayType : finalizeEvolvingArrayType(evolvedType);
-            if (reference.parent && reference.parent.kind === 209 /* NonNullExpression */ && getTypeWithFacts(resultType, 524288 /* NEUndefinedOrNull */).flags & 32768 /* Never */) {
+            var resultType = ts.getObjectFlags(evolvedType) & 256 && isEvolvingArrayOperationTarget(reference) ? anyArrayType : finalizeEvolvingArrayType(evolvedType);
+            if (reference.parent && reference.parent.kind === 209 && getTypeWithFacts(resultType, 524288).flags & 32768) {
                 return declaredType;
             }
             return resultType;
             function getTypeAtFlowNode(flow) {
                 if (flowDepth === 2500) {
-                    // We have made 2500 recursive invocations. To avoid overflowing the call stack we report an error
-                    // and disable further control flow analysis in the containing function or module body.
                     flowAnalysisDisabled = true;
                     reportFlowControlError(reference);
                     return errorType;
@@ -41610,10 +34593,7 @@ var ts;
                 flowDepth++;
                 while (true) {
                     var flags = flow.flags;
-                    if (flags & 1024 /* Shared */) {
-                        // We cache results of flow type resolution for shared nodes that were previously visited in
-                        // the same getFlowTypeOfReference invocation. A node is considered shared when it is the
-                        // antecedent of more than one node.
+                    if (flags & 1024) {
                         for (var i = sharedFlowStart; i < sharedFlowCount; i++) {
                             if (sharedFlowNodes[i] === flow) {
                                 flowDepth--;
@@ -41622,64 +34602,56 @@ var ts;
                         }
                     }
                     var type = void 0;
-                    if (flags & 4096 /* AfterFinally */) {
-                        // block flow edge: finally -> pre-try (for larger explanation check comment in binder.ts - bindTryStatement
+                    if (flags & 4096) {
                         flow.locked = true;
                         type = getTypeAtFlowNode(flow.antecedent);
                         flow.locked = false;
                     }
-                    else if (flags & 2048 /* PreFinally */) {
-                        // locked pre-finally flows are filtered out in getTypeAtFlowBranchLabel
-                        // so here just redirect to antecedent
+                    else if (flags & 2048) {
                         flow = flow.antecedent;
                         continue;
                     }
-                    else if (flags & 16 /* Assignment */) {
+                    else if (flags & 16) {
                         type = getTypeAtFlowAssignment(flow);
                         if (!type) {
                             flow = flow.antecedent;
                             continue;
                         }
                     }
-                    else if (flags & 96 /* Condition */) {
+                    else if (flags & 96) {
                         type = getTypeAtFlowCondition(flow);
                     }
-                    else if (flags & 128 /* SwitchClause */) {
+                    else if (flags & 128) {
                         type = getTypeAtSwitchClause(flow);
                     }
-                    else if (flags & 12 /* Label */) {
+                    else if (flags & 12) {
                         if (flow.antecedents.length === 1) {
                             flow = flow.antecedents[0];
                             continue;
                         }
-                        type = flags & 4 /* BranchLabel */ ?
+                        type = flags & 4 ?
                             getTypeAtFlowBranchLabel(flow) :
                             getTypeAtFlowLoopLabel(flow);
                     }
-                    else if (flags & 256 /* ArrayMutation */) {
+                    else if (flags & 256) {
                         type = getTypeAtFlowArrayMutation(flow);
                         if (!type) {
                             flow = flow.antecedent;
                             continue;
                         }
                     }
-                    else if (flags & 2 /* Start */) {
-                        // Check if we should continue with the control flow of the containing function.
+                    else if (flags & 2) {
                         var container = flow.container;
-                        if (container && container !== flowContainer && reference.kind !== 185 /* PropertyAccessExpression */ && reference.kind !== 99 /* ThisKeyword */) {
+                        if (container && container !== flowContainer && reference.kind !== 185 && reference.kind !== 99) {
                             flow = container.flowNode;
                             continue;
                         }
-                        // At the top of the flow we have the initial type.
                         type = initialType;
                     }
                     else {
-                        // Unreachable code errors are reported in the binding phase. Here we
-                        // simply return the non-auto declared type to reduce follow-on errors.
                         type = convertAutoToAny(declaredType);
                     }
-                    if (flags & 1024 /* Shared */) {
-                        // Record visited node and the associated type in the cache.
+                    if (flags & 1024) {
                         sharedFlowNodes[sharedFlowCount] = flow;
                         sharedFlowTypes[sharedFlowCount] = type;
                         sharedFlowCount++;
@@ -41690,10 +34662,8 @@ var ts;
             }
             function getTypeAtFlowAssignment(flow) {
                 var node = flow.node;
-                // Assignments only narrow the computed type if the declared type is a union type. Thus, we
-                // only need to evaluate the assigned type if the declared type is a union type.
                 if (isMatchingReference(reference, node)) {
-                    if (ts.getAssignmentTargetKind(node) === 2 /* Compound */) {
+                    if (ts.getAssignmentTargetKind(node) === 2) {
                         var flowType = getTypeAtFlowNode(flow.antecedent);
                         return createFlowType(getBaseTypeOfLiteralType(getTypeFromFlowType(flowType)), isIncomplete(flowType));
                     }
@@ -41704,33 +34674,28 @@ var ts;
                         var assignedType = getBaseTypeOfLiteralType(getInitialOrAssignedType(node));
                         return isTypeAssignableTo(assignedType, declaredType) ? assignedType : anyArrayType;
                     }
-                    if (declaredType.flags & 262144 /* Union */) {
+                    if (declaredType.flags & 262144) {
                         return getAssignmentReducedType(declaredType, getInitialOrAssignedType(node));
                     }
                     return declaredType;
                 }
-                // We didn't have a direct match. However, if the reference is a dotted name, this
-                // may be an assignment to a left hand part of the reference. For example, for a
-                // reference 'x.y.z', we may be at an assignment to 'x.y' or 'x'. In that case,
-                // return the declared type.
                 if (containsMatchingReference(reference, node)) {
                     return declaredType;
                 }
-                // Assignment doesn't affect reference
                 return undefined;
             }
             function getTypeAtFlowArrayMutation(flow) {
                 if (declaredType === autoType || declaredType === autoArrayType) {
                     var node = flow.node;
-                    var expr = node.kind === 187 /* CallExpression */ ?
+                    var expr = node.kind === 187 ?
                         node.expression.expression :
                         node.left.expression;
                     if (isMatchingReference(reference, getReferenceCandidate(expr))) {
                         var flowType = getTypeAtFlowNode(flow.antecedent);
                         var type = getTypeFromFlowType(flowType);
-                        if (ts.getObjectFlags(type) & 256 /* EvolvingArray */) {
+                        if (ts.getObjectFlags(type) & 256) {
                             var evolvedType_1 = type;
-                            if (node.kind === 187 /* CallExpression */) {
+                            if (node.kind === 187) {
                                 for (var _i = 0, _a = node.arguments; _i < _a.length; _i++) {
                                     var arg = _a[_i];
                                     evolvedType_1 = addEvolvingArrayElementType(evolvedType_1, arg);
@@ -41738,7 +34703,7 @@ var ts;
                             }
                             else {
                                 var indexType = getTypeOfExpression(node.left.argumentExpression);
-                                if (isTypeAssignableToKind(indexType, 168 /* NumberLike */)) {
+                                if (isTypeAssignableToKind(indexType, 168)) {
                                     evolvedType_1 = addEvolvingArrayElementType(evolvedType_1, node.right);
                                 }
                             }
@@ -41752,24 +34717,17 @@ var ts;
             function getTypeAtFlowCondition(flow) {
                 var flowType = getTypeAtFlowNode(flow.antecedent);
                 var type = getTypeFromFlowType(flowType);
-                if (type.flags & 32768 /* Never */) {
+                if (type.flags & 32768) {
                     return flowType;
                 }
-                // If we have an antecedent type (meaning we're reachable in some way), we first
-                // attempt to narrow the antecedent type. If that produces the never type, and if
-                // the antecedent type is incomplete (i.e. a transient type in a loop), then we
-                // take the type guard as an indication that control *could* reach here once we
-                // have the complete type. We proceed by switching to the silent never type which
-                // doesn't report errors when operators are applied to it. Note that this is the
-                // *only* place a silent never type is ever generated.
-                var assumeTrue = (flow.flags & 32 /* TrueCondition */) !== 0;
+                var assumeTrue = (flow.flags & 32) !== 0;
                 var nonEvolvingType = finalizeEvolvingArrayType(type);
                 var narrowedType = narrowType(nonEvolvingType, flow.expression, assumeTrue);
                 if (narrowedType === nonEvolvingType) {
                     return flowType;
                 }
                 var incomplete = isIncomplete(flowType);
-                var resultType = incomplete && narrowedType.flags & 32768 /* Never */ ? silentNeverType : narrowedType;
+                var resultType = incomplete && narrowedType.flags & 32768 ? silentNeverType : narrowedType;
                 return createFlowType(resultType, incomplete);
             }
             function getTypeAtSwitchClause(flow) {
@@ -41790,25 +34748,15 @@ var ts;
                 var seenIncomplete = false;
                 for (var _i = 0, _a = flow.antecedents; _i < _a.length; _i++) {
                     var antecedent = _a[_i];
-                    if (antecedent.flags & 2048 /* PreFinally */ && antecedent.lock.locked) {
-                        // if flow correspond to branch from pre-try to finally and this branch is locked - this means that
-                        // we initially have started following the flow outside the finally block.
-                        // in this case we should ignore this branch.
+                    if (antecedent.flags & 2048 && antecedent.lock.locked) {
                         continue;
                     }
                     var flowType = getTypeAtFlowNode(antecedent);
                     var type = getTypeFromFlowType(flowType);
-                    // If the type at a particular antecedent path is the declared type and the
-                    // reference is known to always be assigned (i.e. when declared and initial types
-                    // are the same), there is no reason to process more antecedents since the only
-                    // possible outcome is subtypes that will be removed in the final union type anyway.
                     if (type === declaredType && declaredType === initialType) {
                         return type;
                     }
                     ts.pushIfUnique(antecedentTypes, type);
-                    // If an antecedent type is not a subset of the declared type, we need to perform
-                    // subtype reduction. This happens when a "foreign" type is injected into the control
-                    // flow using the instanceof operator or a user defined type predicate.
                     if (!isTypeSubsetOf(type, declaredType)) {
                         subtypeReduction = true;
                     }
@@ -41816,16 +34764,13 @@ var ts;
                         seenIncomplete = true;
                     }
                 }
-                return createFlowType(getUnionOrEvolvingArrayType(antecedentTypes, subtypeReduction ? 2 /* Subtype */ : 1 /* Literal */), seenIncomplete);
+                return createFlowType(getUnionOrEvolvingArrayType(antecedentTypes, subtypeReduction ? 2 : 1), seenIncomplete);
             }
             function getTypeAtFlowLoopLabel(flow) {
-                // If we have previously computed the control flow type for the reference at
-                // this flow loop junction, return the cached type.
                 var id = getFlowNodeId(flow);
                 var cache = flowLoopCaches[id] || (flowLoopCaches[id] = ts.createMap());
                 if (!key) {
                     key = getFlowCacheKey(reference);
-                    // No cache key is generated when binding patterns are in unnarrowable situations
                     if (!key) {
                         return declaredType;
                     }
@@ -41834,21 +34779,11 @@ var ts;
                 if (cached) {
                     return cached;
                 }
-                // If this flow loop junction and reference are already being processed, return
-                // the union of the types computed for each branch so far, marked as incomplete.
-                // It is possible to see an empty array in cases where loops are nested and the
-                // back edge of the outer loop reaches an inner loop that is already being analyzed.
-                // In such cases we restart the analysis of the inner loop, which will then see
-                // a non-empty in-process array for the outer loop and eventually terminate because
-                // the first antecedent of a loop junction is always the non-looping control flow
-                // path that leads to the top.
                 for (var i = flowLoopStart; i < flowLoopCount; i++) {
                     if (flowLoopNodes[i] === flow && flowLoopKeys[i] === key && flowLoopTypes[i].length) {
-                        return createFlowType(getUnionOrEvolvingArrayType(flowLoopTypes[i], 1 /* Literal */), /*incomplete*/ true);
+                        return createFlowType(getUnionOrEvolvingArrayType(flowLoopTypes[i], 1), true);
                     }
                 }
-                // Add the flow loop junction and reference to the in-process stack and analyze
-                // each antecedent code path.
                 var antecedentTypes = [];
                 var subtypeReduction = false;
                 var firstAntecedentType;
@@ -41864,39 +34799,28 @@ var ts;
                         firstAntecedentType = flowType;
                     }
                     var type = getTypeFromFlowType(flowType);
-                    // If we see a value appear in the cache it is a sign that control flow analysis
-                    // was restarted and completed by checkExpressionCached. We can simply pick up
-                    // the resulting type and bail out.
                     var cached_1 = cache.get(key);
                     if (cached_1) {
                         return cached_1;
                     }
                     ts.pushIfUnique(antecedentTypes, type);
-                    // If an antecedent type is not a subset of the declared type, we need to perform
-                    // subtype reduction. This happens when a "foreign" type is injected into the control
-                    // flow using the instanceof operator or a user defined type predicate.
                     if (!isTypeSubsetOf(type, declaredType)) {
                         subtypeReduction = true;
                     }
-                    // If the type at a particular antecedent path is the declared type there is no
-                    // reason to process more antecedents since the only possible outcome is subtypes
-                    // that will be removed in the final union type anyway.
                     if (type === declaredType) {
                         break;
                     }
                 }
-                // The result is incomplete if the first antecedent (the non-looping control flow path)
-                // is incomplete.
-                var result = getUnionOrEvolvingArrayType(antecedentTypes, subtypeReduction ? 2 /* Subtype */ : 1 /* Literal */);
+                var result = getUnionOrEvolvingArrayType(antecedentTypes, subtypeReduction ? 2 : 1);
                 if (isIncomplete(firstAntecedentType)) {
-                    return createFlowType(result, /*incomplete*/ true);
+                    return createFlowType(result, true);
                 }
                 cache.set(key, result);
                 return result;
             }
             function isMatchingReferenceDiscriminant(expr, computedType) {
-                return expr.kind === 185 /* PropertyAccessExpression */ &&
-                    computedType.flags & 262144 /* Union */ &&
+                return expr.kind === 185 &&
+                    computedType.flags & 262144 &&
                     isMatchingReference(reference, expr.expression) &&
                     isDiscriminantProperty(computedType, expr.name.escapedText);
             }
@@ -41908,10 +34832,10 @@ var ts;
             }
             function narrowTypeByTruthiness(type, expr, assumeTrue) {
                 if (isMatchingReference(reference, expr)) {
-                    return getTypeWithFacts(type, assumeTrue ? 1048576 /* Truthy */ : 2097152 /* Falsy */);
+                    return getTypeWithFacts(type, assumeTrue ? 1048576 : 2097152);
                 }
                 if (isMatchingReferenceDiscriminant(expr, declaredType)) {
-                    return narrowTypeByDiscriminant(type, expr, function (t) { return getTypeWithFacts(t, assumeTrue ? 1048576 /* Truthy */ : 2097152 /* Falsy */); });
+                    return narrowTypeByDiscriminant(type, expr, function (t) { return getTypeWithFacts(t, assumeTrue ? 1048576 : 2097152); });
                 }
                 if (containsMatchingReferenceDiscriminant(reference, expr)) {
                     return declaredType;
@@ -41919,17 +34843,17 @@ var ts;
                 return type;
             }
             function isTypePresencePossible(type, propName, assumeTrue) {
-                if (getIndexInfoOfType(type, 0 /* String */)) {
+                if (getIndexInfoOfType(type, 0)) {
                     return true;
                 }
                 var prop = getPropertyOfType(type, propName);
                 if (prop) {
-                    return prop.flags & 16777216 /* Optional */ ? true : assumeTrue;
+                    return prop.flags & 16777216 ? true : assumeTrue;
                 }
                 return !assumeTrue;
             }
             function narrowByInKeyword(type, literal, assumeTrue) {
-                if ((type.flags & (262144 /* Union */ | 131072 /* Object */)) || (type.flags & 65536 /* TypeParameter */ && type.isThisType)) {
+                if ((type.flags & (262144 | 131072)) || (type.flags & 65536 && type.isThisType)) {
                     var propName_1 = ts.escapeLeadingUnderscores(literal.text);
                     return filterType(type, function (t) { return isTypePresencePossible(t, propName_1, assumeTrue); });
                 }
@@ -41937,19 +34861,19 @@ var ts;
             }
             function narrowTypeByBinaryExpression(type, expr, assumeTrue) {
                 switch (expr.operatorToken.kind) {
-                    case 58 /* EqualsToken */:
+                    case 58:
                         return narrowTypeByTruthiness(type, expr.left, assumeTrue);
-                    case 32 /* EqualsEqualsToken */:
-                    case 33 /* ExclamationEqualsToken */:
-                    case 34 /* EqualsEqualsEqualsToken */:
-                    case 35 /* ExclamationEqualsEqualsToken */:
+                    case 32:
+                    case 33:
+                    case 34:
+                    case 35:
                         var operator_1 = expr.operatorToken.kind;
                         var left_1 = getReferenceCandidate(expr.left);
                         var right_1 = getReferenceCandidate(expr.right);
-                        if (left_1.kind === 195 /* TypeOfExpression */ && ts.isStringLiteralLike(right_1)) {
+                        if (left_1.kind === 195 && ts.isStringLiteralLike(right_1)) {
                             return narrowTypeByTypeof(type, left_1, operator_1, right_1, assumeTrue);
                         }
-                        if (right_1.kind === 195 /* TypeOfExpression */ && ts.isStringLiteralLike(left_1)) {
+                        if (right_1.kind === 195 && ts.isStringLiteralLike(left_1)) {
                             return narrowTypeByTypeof(type, right_1, operator_1, left_1, assumeTrue);
                         }
                         if (isMatchingReference(reference, left_1)) {
@@ -41968,45 +34892,45 @@ var ts;
                             return declaredType;
                         }
                         break;
-                    case 93 /* InstanceOfKeyword */:
+                    case 93:
                         return narrowTypeByInstanceof(type, expr, assumeTrue);
-                    case 92 /* InKeyword */:
+                    case 92:
                         var target = getReferenceCandidate(expr.right);
                         if (ts.isStringLiteralLike(expr.left) && isMatchingReference(reference, target)) {
                             return narrowByInKeyword(type, expr.left, assumeTrue);
                         }
                         break;
-                    case 26 /* CommaToken */:
+                    case 26:
                         return narrowType(type, expr.right, assumeTrue);
                 }
                 return type;
             }
             function narrowTypeByEquality(type, operator, value, assumeTrue) {
-                if (type.flags & 1 /* Any */) {
+                if (type.flags & 1) {
                     return type;
                 }
-                if (operator === 33 /* ExclamationEqualsToken */ || operator === 35 /* ExclamationEqualsEqualsToken */) {
+                if (operator === 33 || operator === 35) {
                     assumeTrue = !assumeTrue;
                 }
                 var valueType = getTypeOfExpression(value);
-                if (valueType.flags & 24576 /* Nullable */) {
+                if (valueType.flags & 24576) {
                     if (!strictNullChecks) {
                         return type;
                     }
-                    var doubleEquals = operator === 32 /* EqualsEqualsToken */ || operator === 33 /* ExclamationEqualsToken */;
+                    var doubleEquals = operator === 32 || operator === 33;
                     var facts = doubleEquals ?
-                        assumeTrue ? 65536 /* EQUndefinedOrNull */ : 524288 /* NEUndefinedOrNull */ :
-                        valueType.flags & 16384 /* Null */ ?
-                            assumeTrue ? 32768 /* EQNull */ : 262144 /* NENull */ :
-                            assumeTrue ? 16384 /* EQUndefined */ : 131072 /* NEUndefined */;
+                        assumeTrue ? 65536 : 524288 :
+                        valueType.flags & 16384 ?
+                            assumeTrue ? 32768 : 262144 :
+                            assumeTrue ? 16384 : 131072;
                     return getTypeWithFacts(type, facts);
                 }
-                if (type.flags & 16909315 /* NotUnionOrUnit */) {
+                if (type.flags & 16909315) {
                     return type;
                 }
                 if (assumeTrue) {
                     var narrowedType = filterType(type, function (t) { return areTypesComparable(t, valueType); });
-                    return narrowedType.flags & 32768 /* Never */ ? type : replacePrimitivesWithLiterals(narrowedType, valueType);
+                    return narrowedType.flags & 32768 ? type : replacePrimitivesWithLiterals(narrowedType, valueType);
                 }
                 if (isUnitType(valueType)) {
                     var regularType_1 = getRegularTypeOfLiteralType(valueType);
@@ -42015,32 +34939,26 @@ var ts;
                 return type;
             }
             function narrowTypeByTypeof(type, typeOfExpr, operator, literal, assumeTrue) {
-                // We have '==', '!=', '====', or !==' operator with 'typeof xxx' and string literal operands
                 var target = getReferenceCandidate(typeOfExpr.expression);
                 if (!isMatchingReference(reference, target)) {
-                    // For a reference of the form 'x.y', a 'typeof x === ...' type guard resets the
-                    // narrowed type of 'y' to its declared type.
                     if (containsMatchingReference(reference, target)) {
                         return declaredType;
                     }
                     return type;
                 }
-                if (operator === 33 /* ExclamationEqualsToken */ || operator === 35 /* ExclamationEqualsEqualsToken */) {
+                if (operator === 33 || operator === 35) {
                     assumeTrue = !assumeTrue;
                 }
-                if (type.flags & 1 /* Any */ && literal.text === "function") {
+                if (type.flags & 1 && literal.text === "function") {
                     return type;
                 }
-                if (assumeTrue && !(type.flags & 262144 /* Union */)) {
-                    // We narrow a non-union type to an exact primitive type if the non-union type
-                    // is a supertype of that primitive type. For example, type 'any' can be narrowed
-                    // to one of the primitive types.
+                if (assumeTrue && !(type.flags & 262144)) {
                     var targetType = literal.text === "function" ? globalFunctionType : typeofTypesByName.get(literal.text);
                     if (targetType) {
                         if (isTypeSubtypeOf(targetType, type)) {
                             return targetType;
                         }
-                        if (type.flags & 15794176 /* Instantiable */) {
+                        if (type.flags & 15794176) {
                             var constraint = getBaseConstraintOfType(type) || anyType;
                             if (isTypeSubtypeOf(targetType, constraint)) {
                                 return getIntersectionType([type, targetType]);
@@ -42049,12 +34967,11 @@ var ts;
                     }
                 }
                 var facts = assumeTrue ?
-                    typeofEQFacts.get(literal.text) || 64 /* TypeofEQHostObject */ :
-                    typeofNEFacts.get(literal.text) || 8192 /* TypeofNEHostObject */;
+                    typeofEQFacts.get(literal.text) || 64 :
+                    typeofNEFacts.get(literal.text) || 8192;
                 return getTypeWithFacts(type, facts);
             }
             function narrowTypeBySwitchOnDiscriminant(type, switchStatement, clauseStart, clauseEnd) {
-                // We only narrow if all case expressions specify values with unit types
                 var switchTypes = getSwitchClauseTypes(switchStatement);
                 if (!switchTypes.length) {
                     return type;
@@ -42062,25 +34979,22 @@ var ts;
                 var clauseTypes = switchTypes.slice(clauseStart, clauseEnd);
                 var hasDefaultClause = clauseStart === clauseEnd || ts.contains(clauseTypes, neverType);
                 var discriminantType = getUnionType(clauseTypes);
-                var caseType = discriminantType.flags & 32768 /* Never */ ? neverType :
+                var caseType = discriminantType.flags & 32768 ? neverType :
                     replacePrimitivesWithLiterals(filterType(type, function (t) { return areTypesComparable(discriminantType, t); }), discriminantType);
                 if (!hasDefaultClause) {
                     return caseType;
                 }
                 var defaultType = filterType(type, function (t) { return !(isUnitType(t) && ts.contains(switchTypes, getRegularTypeOfLiteralType(t))); });
-                return caseType.flags & 32768 /* Never */ ? defaultType : getUnionType([caseType, defaultType]);
+                return caseType.flags & 32768 ? defaultType : getUnionType([caseType, defaultType]);
             }
             function narrowTypeByInstanceof(type, expr, assumeTrue) {
                 var left = getReferenceCandidate(expr.left);
                 if (!isMatchingReference(reference, left)) {
-                    // For a reference of the form 'x.y', an 'x instanceof T' type guard resets the
-                    // narrowed type of 'y' to its declared type.
                     if (containsMatchingReference(reference, left)) {
                         return declaredType;
                     }
                     return type;
                 }
-                // Check that right operand is a function type with a prototype property
                 var rightType = getTypeOfExpression(expr.right);
                 if (!isTypeSubtypeOf(rightType, globalFunctionType)) {
                     return type;
@@ -42088,24 +35002,21 @@ var ts;
                 var targetType;
                 var prototypeProperty = getPropertyOfType(rightType, "prototype");
                 if (prototypeProperty) {
-                    // Target type is type of the prototype property
                     var prototypePropertyType = getTypeOfSymbol(prototypeProperty);
                     if (!isTypeAny(prototypePropertyType)) {
                         targetType = prototypePropertyType;
                     }
                 }
-                // Don't narrow from 'any' if the target type is exactly 'Object' or 'Function'
                 if (isTypeAny(type) && (targetType === globalObjectType || targetType === globalFunctionType)) {
                     return type;
                 }
                 if (!targetType) {
-                    // Target type is type of construct signature
                     var constructSignatures = void 0;
-                    if (ts.getObjectFlags(rightType) & 2 /* Interface */) {
+                    if (ts.getObjectFlags(rightType) & 2) {
                         constructSignatures = resolveDeclaredMembers(rightType).declaredConstructSignatures;
                     }
-                    else if (ts.getObjectFlags(rightType) & 16 /* Anonymous */) {
-                        constructSignatures = getSignaturesOfType(rightType, 1 /* Construct */);
+                    else if (ts.getObjectFlags(rightType) & 16) {
+                        constructSignatures = getSignaturesOfType(rightType, 1);
                     }
                     if (constructSignatures && constructSignatures.length) {
                         targetType = getUnionType(ts.map(constructSignatures, function (signature) { return getReturnTypeOfSignature(getErasedSignature(signature)); }));
@@ -42120,19 +35031,12 @@ var ts;
                 if (!assumeTrue) {
                     return filterType(type, function (t) { return !isRelated(t, candidate); });
                 }
-                // If the current type is a union type, remove all constituents that couldn't be instances of
-                // the candidate type. If one or more constituents remain, return a union of those.
-                if (type.flags & 262144 /* Union */) {
+                if (type.flags & 262144) {
                     var assignableType = filterType(type, function (t) { return isRelated(t, candidate); });
-                    if (!(assignableType.flags & 32768 /* Never */)) {
+                    if (!(assignableType.flags & 32768)) {
                         return assignableType;
                     }
                 }
-                // If the candidate type is a subtype of the target type, narrow to the candidate type.
-                // Otherwise, if the target type is assignable to the candidate type, keep the target type.
-                // Otherwise, if the candidate type is assignable to the target type, narrow to the candidate
-                // type. Otherwise, the types are completely unrelated, so narrow to an intersection of the
-                // two types.
                 return isTypeSubtypeOf(candidate, type) ? candidate :
                     isTypeAssignableTo(type, candidate) ? type :
                         isTypeAssignableTo(candidate, type) ? candidate :
@@ -42147,7 +35051,6 @@ var ts;
                 if (!predicate) {
                     return type;
                 }
-                // Don't narrow from 'any' if the predicate type is exactly 'Object' or 'Function'
                 if (isTypeAny(type) && (predicate.type === globalObjectType || predicate.type === globalFunctionType)) {
                     return type;
                 }
@@ -42164,7 +35067,7 @@ var ts;
                 }
                 else {
                     var invokedExpression = ts.skipParentheses(callExpression.expression);
-                    if (invokedExpression.kind === 186 /* ElementAccessExpression */ || invokedExpression.kind === 185 /* PropertyAccessExpression */) {
+                    if (invokedExpression.kind === 186 || invokedExpression.kind === 185) {
                         var accessExpression = invokedExpression;
                         var possibleReference = ts.skipParentheses(accessExpression.expression);
                         if (isMatchingReference(reference, possibleReference)) {
@@ -42177,23 +35080,21 @@ var ts;
                 }
                 return type;
             }
-            // Narrow the given type based on the given expression having the assumed boolean value. The returned type
-            // will be a subtype or the same type as the argument.
             function narrowType(type, expr, assumeTrue) {
                 switch (expr.kind) {
-                    case 71 /* Identifier */:
-                    case 99 /* ThisKeyword */:
-                    case 97 /* SuperKeyword */:
-                    case 185 /* PropertyAccessExpression */:
+                    case 71:
+                    case 99:
+                    case 97:
+                    case 185:
                         return narrowTypeByTruthiness(type, expr, assumeTrue);
-                    case 187 /* CallExpression */:
+                    case 187:
                         return narrowTypeByTypePredicate(type, expr, assumeTrue);
-                    case 191 /* ParenthesizedExpression */:
+                    case 191:
                         return narrowType(type, expr.expression, assumeTrue);
-                    case 200 /* BinaryExpression */:
+                    case 200:
                         return narrowTypeByBinaryExpression(type, expr, assumeTrue);
-                    case 198 /* PrefixUnaryExpression */:
-                        if (expr.operator === 51 /* ExclamationToken */) {
+                    case 198:
+                        if (expr.operator === 51) {
                             return narrowType(type, expr.operand, !assumeTrue);
                         }
                         break;
@@ -42203,11 +35104,7 @@ var ts;
         }
         function getTypeOfSymbolAtLocation(symbol, location) {
             symbol = symbol.exportSymbol || symbol;
-            // If we have an identifier or a property access at the given location, if the location is
-            // an dotted name expression, and if the location is not an assignment target, obtain the type
-            // of the expression (which will reflect control flow analysis). If the expression indeed
-            // resolved to the given symbol, return the narrowed type.
-            if (location.kind === 71 /* Identifier */) {
+            if (location.kind === 71) {
                 if (ts.isRightSideOfQualifiedNameOrPropertyAccess(location)) {
                     location = location.parent;
                 }
@@ -42218,27 +35115,21 @@ var ts;
                     }
                 }
             }
-            // The location isn't a reference to the given symbol, meaning we're being asked
-            // a hypothetical question of what type the symbol would have if there was a reference
-            // to it at the given location. Since we have no control flow information for the
-            // hypothetical reference (control flow information is created and attached by the
-            // binder), we simply return the declared type of the symbol.
             return getTypeOfSymbol(symbol);
         }
         function getControlFlowContainer(node) {
             return ts.findAncestor(node.parent, function (node) {
                 return ts.isFunctionLike(node) && !ts.getImmediatelyInvokedFunctionExpression(node) ||
-                    node.kind === 240 /* ModuleBlock */ ||
-                    node.kind === 274 /* SourceFile */ ||
-                    node.kind === 152 /* PropertyDeclaration */;
+                    node.kind === 240 ||
+                    node.kind === 274 ||
+                    node.kind === 152;
             });
         }
-        // Check if a parameter is assigned anywhere within its declaring function.
         function isParameterAssigned(symbol) {
             var func = ts.getRootDeclaration(symbol.valueDeclaration).parent;
             var links = getNodeLinks(func);
-            if (!(links.flags & 4194304 /* AssignmentsMarked */)) {
-                links.flags |= 4194304 /* AssignmentsMarked */;
+            if (!(links.flags & 4194304)) {
+                links.flags |= 4194304;
                 if (!hasParentWithAssignmentsMarked(func)) {
                     markParameterAssignments(func);
                 }
@@ -42246,13 +35137,13 @@ var ts;
             return symbol.isAssigned || false;
         }
         function hasParentWithAssignmentsMarked(node) {
-            return !!ts.findAncestor(node.parent, function (node) { return ts.isFunctionLike(node) && !!(getNodeLinks(node).flags & 4194304 /* AssignmentsMarked */); });
+            return !!ts.findAncestor(node.parent, function (node) { return ts.isFunctionLike(node) && !!(getNodeLinks(node).flags & 4194304); });
         }
         function markParameterAssignments(node) {
-            if (node.kind === 71 /* Identifier */) {
+            if (node.kind === 71) {
                 if (ts.isAssignmentTarget(node)) {
                     var symbol = getResolvedSymbol(node);
-                    if (symbol.valueDeclaration && ts.getRootDeclaration(symbol.valueDeclaration).kind === 149 /* Parameter */) {
+                    if (symbol.valueDeclaration && ts.getRootDeclaration(symbol.valueDeclaration).kind === 149) {
                         symbol.isAssigned = true;
                     }
                 }
@@ -42262,39 +35153,34 @@ var ts;
             }
         }
         function isConstVariable(symbol) {
-            return symbol.flags & 3 /* Variable */ && (getDeclarationNodeFlagsFromSymbol(symbol) & 2 /* Const */) !== 0 && getTypeOfSymbol(symbol) !== autoArrayType;
+            return symbol.flags & 3 && (getDeclarationNodeFlagsFromSymbol(symbol) & 2) !== 0 && getTypeOfSymbol(symbol) !== autoArrayType;
         }
-        /** remove undefined from the annotated type of a parameter when there is an initializer (that doesn't include undefined) */
         function removeOptionalityFromDeclaredType(declaredType, declaration) {
             var annotationIncludesUndefined = strictNullChecks &&
-                declaration.kind === 149 /* Parameter */ &&
+                declaration.kind === 149 &&
                 declaration.initializer &&
-                getFalsyFlags(declaredType) & 8192 /* Undefined */ &&
-                !(getFalsyFlags(checkExpression(declaration.initializer)) & 8192 /* Undefined */);
-            return annotationIncludesUndefined ? getTypeWithFacts(declaredType, 131072 /* NEUndefined */) : declaredType;
+                getFalsyFlags(declaredType) & 8192 &&
+                !(getFalsyFlags(checkExpression(declaration.initializer)) & 8192);
+            return annotationIncludesUndefined ? getTypeWithFacts(declaredType, 131072) : declaredType;
         }
         function isConstraintPosition(node) {
             var parent = node.parent;
-            return parent.kind === 185 /* PropertyAccessExpression */ ||
-                parent.kind === 187 /* CallExpression */ && parent.expression === node ||
-                parent.kind === 186 /* ElementAccessExpression */ && parent.expression === node ||
-                parent.kind === 182 /* BindingElement */ && parent.name === node && !!parent.initializer;
+            return parent.kind === 185 ||
+                parent.kind === 187 && parent.expression === node ||
+                parent.kind === 186 && parent.expression === node ||
+                parent.kind === 182 && parent.name === node && !!parent.initializer;
         }
         function typeHasNullableConstraint(type) {
-            return type.flags & 14745600 /* InstantiableNonPrimitive */ && maybeTypeOfKind(getBaseConstraintOfType(type) || emptyObjectType, 24576 /* Nullable */);
+            return type.flags & 14745600 && maybeTypeOfKind(getBaseConstraintOfType(type) || emptyObjectType, 24576);
         }
         function getConstraintForLocation(type, node) {
-            // When a node is the left hand expression of a property access, element access, or call expression,
-            // and the type of the node includes type variables with constraints that are nullable, we fetch the
-            // apparent type of the node *before* performing control flow analysis such that narrowings apply to
-            // the constraint type.
             if (type && isConstraintPosition(node) && forEachType(type, typeHasNullableConstraint)) {
                 return mapType(getWidenedType(type), getBaseConstraintOrType);
             }
             return type;
         }
         function markAliasReferenced(symbol, location) {
-            if (isNonLocalAlias(symbol, /*excludes*/ 67216319 /* Value */) && !isInTypeQuery(location) && !isConstEnumOrConstEnumOnlyModule(resolveAlias(symbol))) {
+            if (isNonLocalAlias(symbol, 67216319) && !isInTypeQuery(location) && !isConstEnumOrConstEnumOnlyModule(resolveAlias(symbol))) {
                 markAliasSymbolAsReferenced(symbol);
             }
         }
@@ -42303,62 +35189,48 @@ var ts;
             if (symbol === unknownSymbol) {
                 return errorType;
             }
-            // As noted in ECMAScript 6 language spec, arrow functions never have an arguments objects.
-            // Although in down-level emit of arrow function, we emit it using function expression which means that
-            // arguments objects will be bound to the inner object; emitting arrow function natively in ES6, arguments objects
-            // will be bound to non-arrow function that contain this arrow function. This results in inconsistent behavior.
-            // To avoid that we will give an error to users if they use arguments objects in arrow function so that they
-            // can explicitly bound arguments objects
             if (symbol === argumentsSymbol) {
                 var container = ts.getContainingFunction(node);
-                if (languageVersion < 2 /* ES2015 */) {
-                    if (container.kind === 193 /* ArrowFunction */) {
+                if (languageVersion < 2) {
+                    if (container.kind === 193) {
                         error(node, ts.Diagnostics.The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_standard_function_expression);
                     }
-                    else if (ts.hasModifier(container, 256 /* Async */)) {
+                    else if (ts.hasModifier(container, 256)) {
                         error(node, ts.Diagnostics.The_arguments_object_cannot_be_referenced_in_an_async_function_or_method_in_ES3_and_ES5_Consider_using_a_standard_function_or_method);
                     }
                 }
-                getNodeLinks(container).flags |= 8192 /* CaptureArguments */;
+                getNodeLinks(container).flags |= 8192;
                 return getTypeOfSymbol(symbol);
             }
-            // We should only mark aliases as referenced if there isn't a local value declaration
-            // for the symbol. Also, don't mark any property access expression LHS - checkPropertyAccessExpression will handle that
             if (!(node.parent && ts.isPropertyAccessExpression(node.parent) && node.parent.expression === node)) {
                 markAliasReferenced(symbol, node);
             }
             var localOrExportSymbol = getExportSymbolOfValueSymbolIfExported(symbol);
             var declaration = localOrExportSymbol.valueDeclaration;
-            if (localOrExportSymbol.flags & 32 /* Class */) {
-                // Due to the emit for class decorators, any reference to the class from inside of the class body
-                // must instead be rewritten to point to a temporary variable to avoid issues with the double-bind
-                // behavior of class names in ES6.
-                if (declaration.kind === 235 /* ClassDeclaration */
+            if (localOrExportSymbol.flags & 32) {
+                if (declaration.kind === 235
                     && ts.nodeIsDecorated(declaration)) {
                     var container = ts.getContainingClass(node);
                     while (container !== undefined) {
                         if (container === declaration && container.name !== node) {
-                            getNodeLinks(declaration).flags |= 8388608 /* ClassWithConstructorReference */;
-                            getNodeLinks(node).flags |= 16777216 /* ConstructorReferenceInClass */;
+                            getNodeLinks(declaration).flags |= 8388608;
+                            getNodeLinks(node).flags |= 16777216;
                             break;
                         }
                         container = ts.getContainingClass(container);
                     }
                 }
-                else if (declaration.kind === 205 /* ClassExpression */) {
-                    // When we emit a class expression with static members that contain a reference
-                    // to the constructor in the initializer, we will need to substitute that
-                    // binding with an alias as the class name is not in scope.
-                    var container = ts.getThisContainer(node, /*includeArrowFunctions*/ false);
-                    while (container.kind !== 274 /* SourceFile */) {
+                else if (declaration.kind === 205) {
+                    var container = ts.getThisContainer(node, false);
+                    while (container.kind !== 274) {
                         if (container.parent === declaration) {
-                            if (container.kind === 152 /* PropertyDeclaration */ && ts.hasModifier(container, 32 /* Static */)) {
-                                getNodeLinks(declaration).flags |= 8388608 /* ClassWithConstructorReference */;
-                                getNodeLinks(node).flags |= 16777216 /* ConstructorReferenceInClass */;
+                            if (container.kind === 152 && ts.hasModifier(container, 32)) {
+                                getNodeLinks(declaration).flags |= 8388608;
+                                getNodeLinks(node).flags |= 16777216;
                             }
                             break;
                         }
-                        container = ts.getThisContainer(container, /*includeArrowFunctions*/ false);
+                        container = ts.getThisContainer(container, false);
                     }
                 }
             }
@@ -42366,8 +35238,8 @@ var ts;
             var type = getConstraintForLocation(getTypeOfSymbol(localOrExportSymbol), node);
             var assignmentKind = ts.getAssignmentTargetKind(node);
             if (assignmentKind) {
-                if (!(localOrExportSymbol.flags & 3 /* Variable */) &&
-                    !(ts.isInJavaScriptFile(node) && localOrExportSymbol.flags & 512 /* ValueModule */)) {
+                if (!(localOrExportSymbol.flags & 3) &&
+                    !(ts.isInJavaScriptFile(node) && localOrExportSymbol.flags & 512)) {
                     error(node, ts.Diagnostics.Cannot_assign_to_0_because_it_is_not_a_variable, symbolToString(symbol));
                     return errorType;
                 }
@@ -42376,11 +35248,9 @@ var ts;
                     return errorType;
                 }
             }
-            var isAlias = localOrExportSymbol.flags & 2097152 /* Alias */;
-            // We only narrow variables and parameters occurring in a non-assignment position. For all other
-            // entities we simply return the declared type.
-            if (localOrExportSymbol.flags & 3 /* Variable */) {
-                if (assignmentKind === 1 /* Definite */) {
+            var isAlias = localOrExportSymbol.flags & 2097152;
+            if (localOrExportSymbol.flags & 3) {
+                if (assignmentKind === 1) {
                     return type;
                 }
             }
@@ -42393,38 +35263,26 @@ var ts;
             if (!declaration) {
                 return type;
             }
-            // The declaration container is the innermost function that encloses the declaration of the variable
-            // or parameter. The flow container is the innermost function starting with which we analyze the control
-            // flow graph to determine the control flow based type.
-            var isParameter = ts.getRootDeclaration(declaration).kind === 149 /* Parameter */;
+            var isParameter = ts.getRootDeclaration(declaration).kind === 149;
             var declarationContainer = getControlFlowContainer(declaration);
             var flowContainer = getControlFlowContainer(node);
             var isOuterVariable = flowContainer !== declarationContainer;
             var isSpreadDestructuringAsignmentTarget = node.parent && node.parent.parent && ts.isSpreadAssignment(node.parent) && isDestructuringAssignmentTarget(node.parent.parent);
-            // When the control flow originates in a function expression or arrow function and we are referencing
-            // a const variable or parameter from an outer function, we extend the origin of the control flow
-            // analysis to include the immediately enclosing function.
-            while (flowContainer !== declarationContainer && (flowContainer.kind === 192 /* FunctionExpression */ ||
-                flowContainer.kind === 193 /* ArrowFunction */ || ts.isObjectLiteralOrClassExpressionMethod(flowContainer)) &&
+            while (flowContainer !== declarationContainer && (flowContainer.kind === 192 ||
+                flowContainer.kind === 193 || ts.isObjectLiteralOrClassExpressionMethod(flowContainer)) &&
                 (isConstVariable(localOrExportSymbol) || isParameter && !isParameterAssigned(localOrExportSymbol))) {
                 flowContainer = getControlFlowContainer(flowContainer);
             }
-            // We only look for uninitialized variables in strict null checking mode, and only when we can analyze
-            // the entire control flow graph from the variable's declaration (i.e. when the flow container and
-            // declaration container are the same).
             var assumeInitialized = isParameter || isAlias || isOuterVariable || isSpreadDestructuringAsignmentTarget ||
-                type !== autoType && type !== autoArrayType && (!strictNullChecks || (type.flags & 3 /* AnyOrUnknown */) !== 0 ||
-                    isInTypeQuery(node) || node.parent.kind === 252 /* ExportSpecifier */) ||
-                node.parent.kind === 209 /* NonNullExpression */ ||
-                declaration.kind === 232 /* VariableDeclaration */ && declaration.exclamationToken ||
-                declaration.flags & 4194304 /* Ambient */;
+                type !== autoType && type !== autoArrayType && (!strictNullChecks || (type.flags & 3) !== 0 ||
+                    isInTypeQuery(node) || node.parent.kind === 252) ||
+                node.parent.kind === 209 ||
+                declaration.kind === 232 && declaration.exclamationToken ||
+                declaration.flags & 4194304;
             var initialType = assumeInitialized ? (isParameter ? removeOptionalityFromDeclaredType(type, declaration) : type) :
                 type === autoType || type === autoArrayType ? undefinedType :
                     getOptionalType(type);
             var flowType = getFlowTypeOfReference(node, type, initialType, flowContainer, !assumeInitialized);
-            // A variable is considered uninitialized when it is possible to analyze the entire control flow graph
-            // from declaration to use, and when the variable's declared type doesn't include undefined but the
-            // control flow based type does include undefined.
             if (type === autoType || type === autoArrayType) {
                 if (flowType === autoType || flowType === autoArrayType) {
                     if (noImplicitAny) {
@@ -42434,9 +35292,8 @@ var ts;
                     return convertAutoToAny(flowType);
                 }
             }
-            else if (!assumeInitialized && !(getFalsyFlags(type) & 8192 /* Undefined */) && getFalsyFlags(flowType) & 8192 /* Undefined */) {
+            else if (!assumeInitialized && !(getFalsyFlags(type) & 8192) && getFalsyFlags(flowType) & 8192) {
                 error(node, ts.Diagnostics.Variable_0_is_used_before_being_assigned, symbolToString(symbol));
-                // Return the declared type to reduce follow-on errors
                 return type;
             }
             return assignmentKind ? getBaseTypeOfLiteralType(flowType) : flowType;
@@ -42445,21 +35302,17 @@ var ts;
             return !!ts.findAncestor(node, function (n) { return n === threshold ? "quit" : ts.isFunctionLike(n); });
         }
         function checkNestedBlockScopedBinding(node, symbol) {
-            if (languageVersion >= 2 /* ES2015 */ ||
-                (symbol.flags & (2 /* BlockScopedVariable */ | 32 /* Class */)) === 0 ||
-                symbol.valueDeclaration.parent.kind === 269 /* CatchClause */) {
+            if (languageVersion >= 2 ||
+                (symbol.flags & (2 | 32)) === 0 ||
+                symbol.valueDeclaration.parent.kind === 269) {
                 return;
             }
-            // 1. walk from the use site up to the declaration and check
-            // if there is anything function like between declaration and use-site (is binding/class is captured in function).
-            // 2. walk from the declaration up to the boundary of lexical environment and check
-            // if there is an iteration statement in between declaration and boundary (is binding/class declared inside iteration statement)
             var container = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
             var usedInFunction = isInsideFunction(node.parent, container);
             var current = container;
             var containedInIterationStatement = false;
             while (current && !ts.nodeStartsNewLexicalEnvironment(current)) {
-                if (ts.isIterationStatement(current, /*lookInLabeledStatements*/ false)) {
+                if (ts.isIterationStatement(current, false)) {
                     containedInIterationStatement = true;
                     break;
                 }
@@ -42467,53 +35320,45 @@ var ts;
             }
             if (containedInIterationStatement) {
                 if (usedInFunction) {
-                    // mark iteration statement as containing block-scoped binding captured in some function
-                    getNodeLinks(current).flags |= 65536 /* LoopWithCapturedBlockScopedBinding */;
+                    getNodeLinks(current).flags |= 65536;
                 }
-                // mark variables that are declared in loop initializer and reassigned inside the body of ForStatement.
-                // if body of ForStatement will be converted to function then we'll need a extra machinery to propagate reassigned values back.
-                if (container.kind === 220 /* ForStatement */ &&
-                    ts.getAncestor(symbol.valueDeclaration, 233 /* VariableDeclarationList */).parent === container &&
+                if (container.kind === 220 &&
+                    ts.getAncestor(symbol.valueDeclaration, 233).parent === container &&
                     isAssignedInBodyOfForStatement(node, container)) {
-                    getNodeLinks(symbol.valueDeclaration).flags |= 2097152 /* NeedsLoopOutParameter */;
+                    getNodeLinks(symbol.valueDeclaration).flags |= 2097152;
                 }
-                // set 'declared inside loop' bit on the block-scoped binding
-                getNodeLinks(symbol.valueDeclaration).flags |= 262144 /* BlockScopedBindingInLoop */;
+                getNodeLinks(symbol.valueDeclaration).flags |= 262144;
             }
             if (usedInFunction) {
-                getNodeLinks(symbol.valueDeclaration).flags |= 131072 /* CapturedBlockScopedBinding */;
+                getNodeLinks(symbol.valueDeclaration).flags |= 131072;
             }
         }
         function isAssignedInBodyOfForStatement(node, container) {
-            // skip parenthesized nodes
             var current = node;
-            while (current.parent.kind === 191 /* ParenthesizedExpression */) {
+            while (current.parent.kind === 191) {
                 current = current.parent;
             }
-            // check if node is used as LHS in some assignment expression
             var isAssigned = false;
             if (ts.isAssignmentTarget(current)) {
                 isAssigned = true;
             }
-            else if ((current.parent.kind === 198 /* PrefixUnaryExpression */ || current.parent.kind === 199 /* PostfixUnaryExpression */)) {
+            else if ((current.parent.kind === 198 || current.parent.kind === 199)) {
                 var expr = current.parent;
-                isAssigned = expr.operator === 43 /* PlusPlusToken */ || expr.operator === 44 /* MinusMinusToken */;
+                isAssigned = expr.operator === 43 || expr.operator === 44;
             }
             if (!isAssigned) {
                 return false;
             }
-            // at this point we know that node is the target of assignment
-            // now check that modification happens inside the statement part of the ForStatement
             return !!ts.findAncestor(current, function (n) { return n === container ? "quit" : n === container.statement; });
         }
         function captureLexicalThis(node, container) {
-            getNodeLinks(node).flags |= 2 /* LexicalThis */;
-            if (container.kind === 152 /* PropertyDeclaration */ || container.kind === 155 /* Constructor */) {
+            getNodeLinks(node).flags |= 2;
+            if (container.kind === 152 || container.kind === 155) {
                 var classNode = container.parent;
-                getNodeLinks(classNode).flags |= 4 /* CaptureThis */;
+                getNodeLinks(classNode).flags |= 4;
             }
             else {
-                getNodeLinks(container).flags |= 4 /* CaptureThis */;
+                getNodeLinks(container).flags |= 4;
             }
         }
         function findFirstSuperCall(n) {
@@ -42525,26 +35370,14 @@ var ts;
             }
             return ts.forEachChild(n, findFirstSuperCall);
         }
-        /**
-         * Return a cached result if super-statement is already found.
-         * Otherwise, find a super statement in a given constructor function and cache the result in the node-links of the constructor
-         *
-         * @param constructor constructor-function to look for super statement
-         */
         function getSuperCallInConstructor(constructor) {
             var links = getNodeLinks(constructor);
-            // Only trying to find super-call if we haven't yet tried to find one.  Once we try, we will record the result
             if (links.hasSuperCall === undefined) {
                 links.superCall = findFirstSuperCall(constructor.body);
                 links.hasSuperCall = links.superCall ? true : false;
             }
             return links.superCall;
         }
-        /**
-         * Check if the given class-declaration extends null then return true.
-         * Otherwise, return false
-         * @param classDecl a class declaration to check if it extends null
-         */
         function classDeclarationExtendsNull(classDecl) {
             var classSymbol = getSymbolOfNode(classDecl);
             var classInstanceType = getDeclaredTypeOfSymbol(classSymbol);
@@ -42554,60 +35387,42 @@ var ts;
         function checkThisBeforeSuper(node, container, diagnosticMessage) {
             var containingClassDecl = container.parent;
             var baseTypeNode = ts.getClassExtendsHeritageClauseElement(containingClassDecl);
-            // If a containing class does not have extends clause or the class extends null
-            // skip checking whether super statement is called before "this" accessing.
             if (baseTypeNode && !classDeclarationExtendsNull(containingClassDecl)) {
                 var superCall = getSuperCallInConstructor(container);
-                // We should give an error in the following cases:
-                //      - No super-call
-                //      - "this" is accessing before super-call.
-                //          i.e super(this)
-                //              this.x; super();
-                // We want to make sure that super-call is done before accessing "this" so that
-                // "this" is not accessed as a parameter of the super-call.
                 if (!superCall || superCall.end > node.pos) {
-                    // In ES6, super inside constructor of class-declaration has to precede "this" accessing
                     error(node, diagnosticMessage);
                 }
             }
         }
         function checkThisExpression(node) {
-            // Stop at the first arrow function so that we can
-            // tell whether 'this' needs to be captured.
-            var container = ts.getThisContainer(node, /* includeArrowFunctions */ true);
+            var container = ts.getThisContainer(node, true);
             var needToCaptureLexicalThis = false;
-            if (container.kind === 155 /* Constructor */) {
+            if (container.kind === 155) {
                 checkThisBeforeSuper(node, container, ts.Diagnostics.super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class);
             }
-            // Now skip arrow functions to get the "real" owner of 'this'.
-            if (container.kind === 193 /* ArrowFunction */) {
-                container = ts.getThisContainer(container, /* includeArrowFunctions */ false);
-                // When targeting es6, arrow function lexically bind "this" so we do not need to do the work of binding "this" in emitted code
-                needToCaptureLexicalThis = (languageVersion < 2 /* ES2015 */);
+            if (container.kind === 193) {
+                container = ts.getThisContainer(container, false);
+                needToCaptureLexicalThis = (languageVersion < 2);
             }
             switch (container.kind) {
-                case 239 /* ModuleDeclaration */:
+                case 239:
                     error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_module_or_namespace_body);
-                    // do not return here so in case if lexical this is captured - it will be reflected in flags on NodeLinks
                     break;
-                case 238 /* EnumDeclaration */:
+                case 238:
                     error(node, ts.Diagnostics.this_cannot_be_referenced_in_current_location);
-                    // do not return here so in case if lexical this is captured - it will be reflected in flags on NodeLinks
                     break;
-                case 155 /* Constructor */:
+                case 155:
                     if (isInConstructorArgumentInitializer(node, container)) {
                         error(node, ts.Diagnostics.this_cannot_be_referenced_in_constructor_arguments);
-                        // do not return here so in case if lexical this is captured - it will be reflected in flags on NodeLinks
                     }
                     break;
-                case 152 /* PropertyDeclaration */:
-                case 151 /* PropertySignature */:
-                    if (ts.hasModifier(container, 32 /* Static */)) {
+                case 152:
+                case 151:
+                    if (ts.hasModifier(container, 32)) {
                         error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_static_property_initializer);
-                        // do not return here so in case if lexical this is captured - it will be reflected in flags on NodeLinks
                     }
                     break;
-                case 147 /* ComputedPropertyName */:
+                case 147:
                     error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_computed_property_name);
                     break;
             }
@@ -42616,28 +35431,23 @@ var ts;
             }
             var type = tryGetThisTypeAt(node, container);
             if (!type && noImplicitThis) {
-                // With noImplicitThis, functions may not reference 'this' if it has type 'any'
                 error(node, ts.Diagnostics.this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation);
             }
             return type || anyType;
         }
         function tryGetThisTypeAt(node, container) {
-            if (container === void 0) { container = ts.getThisContainer(node, /*includeArrowFunctions*/ false); }
+            if (container === void 0) { container = ts.getThisContainer(node, false); }
             if (ts.isFunctionLike(container) &&
                 (!isInParameterInitializerBeforeContainingFunction(node) || ts.getThisParameter(container))) {
-                // Note: a parameter initializer should refer to class-this unless function-this is explicitly annotated.
-                // If this is a function in a JS file, it might be a class method. Check if it's the RHS
-                // of a x.prototype.y = function [name]() { .... }
-                if (container.kind === 192 /* FunctionExpression */ &&
-                    container.parent.kind === 200 /* BinaryExpression */ &&
-                    ts.getSpecialPropertyAssignmentKind(container.parent) === 3 /* PrototypeProperty */) {
-                    // Get the 'x' of 'x.prototype.y = f' (here, 'f' is 'container')
-                    var className = container.parent // x.prototype.y = f
-                        .left // x.prototype.y
-                        .expression // x.prototype
-                        .expression; // x
+                if (container.kind === 192 &&
+                    container.parent.kind === 200 &&
+                    ts.getSpecialPropertyAssignmentKind(container.parent) === 3) {
+                    var className = container.parent
+                        .left
+                        .expression
+                        .expression;
                     var classSymbol = checkExpression(className).symbol;
-                    if (classSymbol && classSymbol.members && (classSymbol.flags & 16 /* Function */)) {
+                    if (classSymbol && classSymbol.members && (classSymbol.flags & 16)) {
                         return getFlowTypeOfReference(node, getInferredClassType(classSymbol));
                     }
                 }
@@ -42648,7 +35458,7 @@ var ts;
             }
             if (ts.isClassLike(container.parent)) {
                 var symbol = getSymbolOfNode(container.parent);
-                var type = ts.hasModifier(container, 32 /* Static */) ? getTypeOfSymbol(symbol) : getDeclaredTypeOfSymbol(symbol).thisType;
+                var type = ts.hasModifier(container, 32) ? getTypeOfSymbol(symbol) : getDeclaredTypeOfSymbol(symbol).thisType;
                 return getFlowTypeOfReference(node, type);
             }
             if (ts.isInJavaScriptFile(node)) {
@@ -42660,7 +35470,7 @@ var ts;
         }
         function getTypeForThisExpressionFromJSDoc(node) {
             var jsdocType = ts.getJSDocType(node);
-            if (jsdocType && jsdocType.kind === 284 /* JSDocFunctionType */) {
+            if (jsdocType && jsdocType.kind === 284) {
                 var jsDocFunctionType = jsdocType;
                 if (jsDocFunctionType.parameters.length > 0 &&
                     jsDocFunctionType.parameters[0].name &&
@@ -42670,35 +35480,29 @@ var ts;
             }
         }
         function isInConstructorArgumentInitializer(node, constructorDecl) {
-            return !!ts.findAncestor(node, function (n) { return n === constructorDecl ? "quit" : n.kind === 149 /* Parameter */; });
+            return !!ts.findAncestor(node, function (n) { return n === constructorDecl ? "quit" : n.kind === 149; });
         }
         function checkSuperExpression(node) {
-            var isCallExpression = node.parent.kind === 187 /* CallExpression */ && node.parent.expression === node;
-            var container = ts.getSuperContainer(node, /*stopOnFunctions*/ true);
+            var isCallExpression = node.parent.kind === 187 && node.parent.expression === node;
+            var container = ts.getSuperContainer(node, true);
             var needToCaptureLexicalThis = false;
-            // adjust the container reference in case if super is used inside arrow functions with arbitrarily deep nesting
             if (!isCallExpression) {
-                while (container && container.kind === 193 /* ArrowFunction */) {
-                    container = ts.getSuperContainer(container, /*stopOnFunctions*/ true);
-                    needToCaptureLexicalThis = languageVersion < 2 /* ES2015 */;
+                while (container && container.kind === 193) {
+                    container = ts.getSuperContainer(container, true);
+                    needToCaptureLexicalThis = languageVersion < 2;
                 }
             }
             var canUseSuperExpression = isLegalUsageOfSuperExpression(container);
             var nodeCheckFlag = 0;
             if (!canUseSuperExpression) {
-                // issue more specific error if super is used in computed property name
-                // class A { foo() { return "1" }}
-                // class B {
-                //     [super.foo()]() {}
-                // }
-                var current = ts.findAncestor(node, function (n) { return n === container ? "quit" : n.kind === 147 /* ComputedPropertyName */; });
-                if (current && current.kind === 147 /* ComputedPropertyName */) {
+                var current = ts.findAncestor(node, function (n) { return n === container ? "quit" : n.kind === 147; });
+                if (current && current.kind === 147) {
                     error(node, ts.Diagnostics.super_cannot_be_referenced_in_a_computed_property_name);
                 }
                 else if (isCallExpression) {
                     error(node, ts.Diagnostics.Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors);
                 }
-                else if (!container || !container.parent || !(ts.isClassLike(container.parent) || container.parent.kind === 184 /* ObjectLiteralExpression */)) {
+                else if (!container || !container.parent || !(ts.isClassLike(container.parent) || container.parent.kind === 184)) {
                     error(node, ts.Diagnostics.super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions);
                 }
                 else {
@@ -42706,97 +35510,36 @@ var ts;
                 }
                 return errorType;
             }
-            if (!isCallExpression && container.kind === 155 /* Constructor */) {
+            if (!isCallExpression && container.kind === 155) {
                 checkThisBeforeSuper(node, container, ts.Diagnostics.super_must_be_called_before_accessing_a_property_of_super_in_the_constructor_of_a_derived_class);
             }
-            if (ts.hasModifier(container, 32 /* Static */) || isCallExpression) {
-                nodeCheckFlag = 512 /* SuperStatic */;
+            if (ts.hasModifier(container, 32) || isCallExpression) {
+                nodeCheckFlag = 512;
             }
             else {
-                nodeCheckFlag = 256 /* SuperInstance */;
+                nodeCheckFlag = 256;
             }
             getNodeLinks(node).flags |= nodeCheckFlag;
-            // Due to how we emit async functions, we need to specialize the emit for an async method that contains a `super` reference.
-            // This is due to the fact that we emit the body of an async function inside of a generator function. As generator
-            // functions cannot reference `super`, we emit a helper inside of the method body, but outside of the generator. This helper
-            // uses an arrow function, which is permitted to reference `super`.
-            //
-            // There are two primary ways we can access `super` from within an async method. The first is getting the value of a property
-            // or indexed access on super, either as part of a right-hand-side expression or call expression. The second is when setting the value
-            // of a property or indexed access, either as part of an assignment expression or destructuring assignment.
-            //
-            // The simplest case is reading a value, in which case we will emit something like the following:
-            //
-            //  // ts
-            //  ...
-            //  async asyncMethod() {
-            //    let x = await super.asyncMethod();
-            //    return x;
-            //  }
-            //  ...
-            //
-            //  // js
-            //  ...
-            //  asyncMethod() {
-            //      const _super = name => super[name];
-            //      return __awaiter(this, arguments, Promise, function *() {
-            //          let x = yield _super("asyncMethod").call(this);
-            //          return x;
-            //      });
-            //  }
-            //  ...
-            //
-            // The more complex case is when we wish to assign a value, especially as part of a destructuring assignment. As both cases
-            // are legal in ES6, but also likely less frequent, we emit the same more complex helper for both scenarios:
-            //
-            //  // ts
-            //  ...
-            //  async asyncMethod(ar: Promise<any[]>) {
-            //      [super.a, super.b] = await ar;
-            //  }
-            //  ...
-            //
-            //  // js
-            //  ...
-            //  asyncMethod(ar) {
-            //      const _super = (function (geti, seti) {
-            //          const cache = Object.create(null);
-            //          return name => cache[name] || (cache[name] = { get value() { return geti(name); }, set value(v) { seti(name, v); } });
-            //      })(name => super[name], (name, value) => super[name] = value);
-            //      return __awaiter(this, arguments, Promise, function *() {
-            //          [_super("a").value, _super("b").value] = yield ar;
-            //      });
-            //  }
-            //  ...
-            //
-            // This helper creates an object with a "value" property that wraps the `super` property or indexed access for both get and set.
-            // This is required for destructuring assignments, as a call expression cannot be used as the target of a destructuring assignment
-            // while a property access can.
-            if (container.kind === 154 /* MethodDeclaration */ && ts.hasModifier(container, 256 /* Async */)) {
+            if (container.kind === 154 && ts.hasModifier(container, 256)) {
                 if (ts.isSuperProperty(node.parent) && ts.isAssignmentTarget(node.parent)) {
-                    getNodeLinks(container).flags |= 4096 /* AsyncMethodWithSuperBinding */;
+                    getNodeLinks(container).flags |= 4096;
                 }
                 else {
-                    getNodeLinks(container).flags |= 2048 /* AsyncMethodWithSuper */;
+                    getNodeLinks(container).flags |= 2048;
                 }
             }
             if (needToCaptureLexicalThis) {
-                // call expressions are allowed only in constructors so they should always capture correct 'this'
-                // super property access expressions can also appear in arrow functions -
-                // in this case they should also use correct lexical this
                 captureLexicalThis(node.parent, container);
             }
-            if (container.parent.kind === 184 /* ObjectLiteralExpression */) {
-                if (languageVersion < 2 /* ES2015 */) {
+            if (container.parent.kind === 184) {
+                if (languageVersion < 2) {
                     error(node, ts.Diagnostics.super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_higher);
                     return errorType;
                 }
                 else {
-                    // for object literal assume that type of 'super' is 'any'
                     return anyType;
                 }
             }
-            // at this point the only legal case for parent is ClassLikeDeclaration
             var classLikeDeclaration = container.parent;
             if (!ts.getClassExtendsHeritageClauseElement(classLikeDeclaration)) {
                 error(node, ts.Diagnostics.super_can_only_be_referenced_in_a_derived_class);
@@ -42807,12 +35550,11 @@ var ts;
             if (!baseClassType) {
                 return errorType;
             }
-            if (container.kind === 155 /* Constructor */ && isInConstructorArgumentInitializer(node, container)) {
-                // issue custom error message for super property access in constructor arguments (to be aligned with old compiler)
+            if (container.kind === 155 && isInConstructorArgumentInitializer(node, container)) {
                 error(node, ts.Diagnostics.super_cannot_be_referenced_in_constructor_arguments);
                 return errorType;
             }
-            return nodeCheckFlag === 512 /* SuperStatic */
+            return nodeCheckFlag === 512
                 ? getBaseConstructorTypeOfClass(classType)
                 : getTypeWithThisArgument(baseClassType, classType.thisType);
             function isLegalUsageOfSuperExpression(container) {
@@ -42820,31 +35562,24 @@ var ts;
                     return false;
                 }
                 if (isCallExpression) {
-                    // TS 1.0 SPEC (April 2014): 4.8.1
-                    // Super calls are only permitted in constructors of derived classes
-                    return container.kind === 155 /* Constructor */;
+                    return container.kind === 155;
                 }
                 else {
-                    // TS 1.0 SPEC (April 2014)
-                    // 'super' property access is allowed
-                    // - In a constructor, instance member function, instance member accessor, or instance member variable initializer where this references a derived class instance
-                    // - In a static member function or static member accessor
-                    // topmost container must be something that is directly nested in the class declaration\object literal expression
-                    if (ts.isClassLike(container.parent) || container.parent.kind === 184 /* ObjectLiteralExpression */) {
-                        if (ts.hasModifier(container, 32 /* Static */)) {
-                            return container.kind === 154 /* MethodDeclaration */ ||
-                                container.kind === 153 /* MethodSignature */ ||
-                                container.kind === 156 /* GetAccessor */ ||
-                                container.kind === 157 /* SetAccessor */;
+                    if (ts.isClassLike(container.parent) || container.parent.kind === 184) {
+                        if (ts.hasModifier(container, 32)) {
+                            return container.kind === 154 ||
+                                container.kind === 153 ||
+                                container.kind === 156 ||
+                                container.kind === 157;
                         }
                         else {
-                            return container.kind === 154 /* MethodDeclaration */ ||
-                                container.kind === 153 /* MethodSignature */ ||
-                                container.kind === 156 /* GetAccessor */ ||
-                                container.kind === 157 /* SetAccessor */ ||
-                                container.kind === 152 /* PropertyDeclaration */ ||
-                                container.kind === 151 /* PropertySignature */ ||
-                                container.kind === 155 /* Constructor */;
+                            return container.kind === 154 ||
+                                container.kind === 153 ||
+                                container.kind === 156 ||
+                                container.kind === 157 ||
+                                container.kind === 152 ||
+                                container.kind === 151 ||
+                                container.kind === 155;
                         }
                     }
                 }
@@ -42852,22 +35587,22 @@ var ts;
             }
         }
         function getContainingObjectLiteral(func) {
-            return (func.kind === 154 /* MethodDeclaration */ ||
-                func.kind === 156 /* GetAccessor */ ||
-                func.kind === 157 /* SetAccessor */) && func.parent.kind === 184 /* ObjectLiteralExpression */ ? func.parent :
-                func.kind === 192 /* FunctionExpression */ && func.parent.kind === 270 /* PropertyAssignment */ ? func.parent.parent :
+            return (func.kind === 154 ||
+                func.kind === 156 ||
+                func.kind === 157) && func.parent.kind === 184 ? func.parent :
+                func.kind === 192 && func.parent.kind === 270 ? func.parent.parent :
                     undefined;
         }
         function getThisTypeArgument(type) {
-            return ts.getObjectFlags(type) & 4 /* Reference */ && type.target === globalThisType ? type.typeArguments[0] : undefined;
+            return ts.getObjectFlags(type) & 4 && type.target === globalThisType ? type.typeArguments[0] : undefined;
         }
         function getThisTypeFromContextualType(type) {
             return mapType(type, function (t) {
-                return t.flags & 524288 /* Intersection */ ? ts.forEach(t.types, getThisTypeArgument) : getThisTypeArgument(t);
+                return t.flags & 524288 ? ts.forEach(t.types, getThisTypeArgument) : getThisTypeArgument(t);
             });
         }
         function getContextualThisParameterType(func) {
-            if (func.kind === 193 /* ArrowFunction */) {
+            if (func.kind === 193) {
                 return undefined;
             }
             if (isContextSensitiveFunctionOrObjectLiteralMethod(func)) {
@@ -42883,9 +35618,6 @@ var ts;
             if (noImplicitThis || inJs) {
                 var containingLiteral = getContainingObjectLiteral(func);
                 if (containingLiteral) {
-                    // We have an object literal method. Check if the containing object literal has a contextual type
-                    // that includes a ThisType<T>. If so, T is the contextual type for 'this'. We continue looking in
-                    // any directly enclosing object literals.
                     var contextualType = getApparentTypeOfContextualType(containingLiteral);
                     var literal = containingLiteral;
                     var type = contextualType;
@@ -42894,25 +35626,19 @@ var ts;
                         if (thisType) {
                             return instantiateType(thisType, getContextualMapper(containingLiteral));
                         }
-                        if (literal.parent.kind !== 270 /* PropertyAssignment */) {
+                        if (literal.parent.kind !== 270) {
                             break;
                         }
                         literal = literal.parent.parent;
                         type = getApparentTypeOfContextualType(literal);
                     }
-                    // There was no contextual ThisType<T> for the containing object literal, so the contextual type
-                    // for 'this' is the non-null form of the contextual type for the containing object literal or
-                    // the type of the object literal itself.
                     return contextualType ? getNonNullableType(contextualType) : checkExpressionCached(containingLiteral);
                 }
-                // In an assignment of the form 'obj.xxx = function(...)' or 'obj[xxx] = function(...)', the
-                // contextual type for 'this' is 'obj'.
                 var parent = func.parent;
-                if (parent.kind === 200 /* BinaryExpression */ && parent.operatorToken.kind === 58 /* EqualsToken */) {
+                if (parent.kind === 200 && parent.operatorToken.kind === 58) {
                     var target = parent.left;
-                    if (target.kind === 185 /* PropertyAccessExpression */ || target.kind === 186 /* ElementAccessExpression */) {
+                    if (target.kind === 185 || target.kind === 186) {
                         var expression = target.expression;
-                        // Don't contextually type `this` as `exports` in `exports.Point = function(x, y) { this.x = x; this.y = y; }`
                         if (inJs && ts.isIdentifier(expression)) {
                             var sourceFile = ts.getSourceFileOfNode(parent);
                             if (sourceFile.commonJsModuleIndicator && getResolvedSymbol(expression) === sourceFile.symbol) {
@@ -42925,7 +35651,6 @@ var ts;
             }
             return undefined;
         }
-        // Return contextual type of parameter or undefined if no contextual type is available
         function getContextuallyTypedParameterType(parameter) {
             var func = parameter.parent;
             if (!isContextSensitiveFunctionOrObjectLiteralMethod(func)) {
@@ -42956,13 +35681,12 @@ var ts;
                 var len = func.parameters.length - (funcHasRestParameters ? 1 : 0);
                 var indexOfParameter = func.parameters.indexOf(parameter);
                 if (ts.getThisParameter(func) !== undefined && !contextualSignature.thisParameter) {
-                    ts.Debug.assert(indexOfParameter !== 0); // Otherwise we should not have called `getContextuallyTypedParameterType`.
+                    ts.Debug.assert(indexOfParameter !== 0);
                     indexOfParameter -= 1;
                 }
                 if (indexOfParameter < len) {
                     return getTypeAtPosition(contextualSignature, indexOfParameter);
                 }
-                // If last parameter is contextually rest parameter get its type
                 if (funcHasRestParameters &&
                     indexOfParameter === (func.parameters.length - 1) &&
                     isRestParameterIndex(contextualSignature, func.parameters.length - 1)) {
@@ -42970,14 +35694,6 @@ var ts;
                 }
             }
         }
-        // In a variable, parameter or property declaration with a type annotation,
-        //   the contextual type of an initializer expression is the type of the variable, parameter or property.
-        // Otherwise, in a parameter declaration of a contextually typed function expression,
-        //   the contextual type of an initializer expression is the contextual type of the parameter.
-        // Otherwise, in a variable or parameter declaration with a binding pattern name,
-        //   the contextual type of an initializer expression is the type implied by the binding pattern.
-        // Otherwise, in a binding pattern inside a variable or parameter declaration,
-        //   the contextual type of an initializer expression is the type annotation of the containing declaration, if present.
         function getContextualTypeForInitializerExpression(node) {
             var declaration = node.parent;
             if (ts.hasInitializer(declaration) && node === declaration.initializer) {
@@ -42985,19 +35701,19 @@ var ts;
                 if (typeNode) {
                     return getTypeFromTypeNode(typeNode);
                 }
-                if (declaration.kind === 149 /* Parameter */) {
+                if (declaration.kind === 149) {
                     var type = getContextuallyTypedParameterType(declaration);
                     if (type) {
                         return type;
                     }
                 }
                 if (ts.isBindingPattern(declaration.name)) {
-                    return getTypeFromBindingPattern(declaration.name, /*includePatternInType*/ true, /*reportErrors*/ false);
+                    return getTypeFromBindingPattern(declaration.name, true, false);
                 }
                 if (ts.isBindingPattern(declaration.parent)) {
                     var parentDeclaration = declaration.parent.parent;
                     var name = declaration.propertyName || declaration.name;
-                    if (parentDeclaration.kind !== 182 /* BindingElement */) {
+                    if (parentDeclaration.kind !== 182) {
                         var parentTypeNode = ts.getEffectiveTypeAnnotationNode(parentDeclaration);
                         if (parentTypeNode && !ts.isBindingPattern(name)) {
                             var text = ts.getTextOfPropertyName(name);
@@ -43014,13 +35730,13 @@ var ts;
             var func = ts.getContainingFunction(node);
             if (func) {
                 var functionFlags = ts.getFunctionFlags(func);
-                if (functionFlags & 1 /* Generator */) { // AsyncGenerator function or Generator function
+                if (functionFlags & 1) {
                     return undefined;
                 }
                 var contextualReturnType = getContextualReturnType(func);
-                return functionFlags & 2 /* Async */
-                    ? contextualReturnType && getAwaitedTypeOfPromise(contextualReturnType) // Async function
-                    : contextualReturnType; // Regular function
+                return functionFlags & 2
+                    ? contextualReturnType && getAwaitedTypeOfPromise(contextualReturnType)
+                    : contextualReturnType;
             }
             return undefined;
         }
@@ -43032,7 +35748,7 @@ var ts;
                 if (contextualReturnType) {
                     return node.asteriskToken
                         ? contextualReturnType
-                        : getIteratedTypeOfGenerator(contextualReturnType, (functionFlags & 2 /* Async */) !== 0);
+                        : getIteratedTypeOfGenerator(contextualReturnType, (functionFlags & 2) !== 0);
                 }
             }
             return undefined;
@@ -43051,35 +35767,28 @@ var ts;
             return false;
         }
         function getContextualReturnType(functionDecl) {
-            // If the containing function has a return type annotation, is a constructor, or is a get accessor whose
-            // corresponding set accessor has a type annotation, return statements in the function are contextually typed
-            if (functionDecl.kind === 155 /* Constructor */ ||
+            if (functionDecl.kind === 155 ||
                 ts.getEffectiveReturnTypeNode(functionDecl) ||
                 isGetAccessorWithAnnotatedSetAccessor(functionDecl)) {
                 return getReturnTypeOfSignature(getSignatureFromDeclaration(functionDecl));
             }
-            // Otherwise, if the containing function is contextually typed by a function type with exactly one call signature
-            // and that call signature is non-generic, return statements are contextually typed by the return type of the signature
             var signature = getContextualSignatureForFunctionLikeDeclaration(functionDecl);
             if (signature && !isResolvingReturnTypeOfSignature(signature)) {
                 return getReturnTypeOfSignature(signature);
             }
             return undefined;
         }
-        // In a typed function call, an argument or substitution expression is contextually typed by the type of the corresponding parameter.
         function getContextualTypeForArgument(callTarget, arg) {
-            var args = getEffectiveCallArguments(callTarget); // TODO: GH#18217
-            var argIndex = args.indexOf(arg); // -1 for e.g. the expression of a CallExpression, or the tag of a TaggedTemplateExpression
+            var args = getEffectiveCallArguments(callTarget);
+            var argIndex = args.indexOf(arg);
             return argIndex === -1 ? undefined : getContextualTypeForArgumentAtIndex(callTarget, argIndex);
         }
         function getContextualTypeForArgumentAtIndex(callTarget, argIndex) {
-            // If we're already in the process of resolving the given signature, don't resolve again as
-            // that could cause infinite recursion. Instead, return anySignature.
             var signature = getNodeLinks(callTarget).resolvedSignature === resolvingSignature ? resolvingSignature : getResolvedSignature(callTarget);
             return getTypeAtPosition(signature, argIndex);
         }
         function getContextualTypeForSubstitutionExpression(template, substitutionExpression) {
-            if (template.parent.kind === 189 /* TaggedTemplateExpression */) {
+            if (template.parent.kind === 189) {
                 return getContextualTypeForArgument(template.parent, substitutionExpression);
             }
             return undefined;
@@ -43088,38 +35797,31 @@ var ts;
             var binaryExpression = node.parent;
             var left = binaryExpression.left, operatorToken = binaryExpression.operatorToken, right = binaryExpression.right;
             switch (operatorToken.kind) {
-                case 58 /* EqualsToken */:
+                case 58:
                     return node === right && isContextSensitiveAssignment(binaryExpression) ? getTypeOfExpression(left) : undefined;
-                case 54 /* BarBarToken */:
-                    // When an || expression has a contextual type, the operands are contextually typed by that type. When an ||
-                    // expression has no contextual type, the right operand is contextually typed by the type of the left operand,
-                    // except for the special case of Javascript declarations of the form `namespace.prop = namespace.prop || {}`
+                case 54:
                     var type = getContextualType(binaryExpression);
                     return !type && node === right && !ts.isDefaultedJavascriptInitializer(binaryExpression) ?
                         getTypeOfExpression(left) : type;
-                case 53 /* AmpersandAmpersandToken */:
-                case 26 /* CommaToken */:
+                case 53:
+                case 26:
                     return node === right ? getContextualType(binaryExpression) : undefined;
                 default:
                     return undefined;
             }
         }
-        // In an assignment expression, the right operand is contextually typed by the type of the left operand.
-        // Don't do this for special property assignments to avoid circularity.
         function isContextSensitiveAssignment(binaryExpression) {
             var kind = ts.getSpecialPropertyAssignmentKind(binaryExpression);
             switch (kind) {
-                case 0 /* None */:
+                case 0:
                     return true;
-                case 5 /* Property */:
-                    // If `binaryExpression.left` was assigned a symbol, then this is a new declaration; otherwise it is an assignment to an existing declaration.
-                    // See `bindStaticPropertyAssignment` in `binder.ts`.
+                case 5:
                     return !binaryExpression.left.symbol;
-                case 1 /* ExportsProperty */:
-                case 2 /* ModuleExports */:
-                case 3 /* PrototypeProperty */:
-                case 4 /* ThisProperty */:
-                case 6 /* Prototype */:
+                case 1:
+                case 2:
+                case 3:
+                case 4:
+                case 6:
                     return false;
                 default:
                     return ts.Debug.assertNever(kind);
@@ -43127,24 +35829,19 @@ var ts;
         }
         function getTypeOfPropertyOfContextualType(type, name) {
             return mapType(type, function (t) {
-                var prop = t.flags & 917504 /* StructuredType */ ? getPropertyOfType(t, name) : undefined;
+                var prop = t.flags & 917504 ? getPropertyOfType(t, name) : undefined;
                 return prop ? getTypeOfSymbol(prop) : undefined;
-            }, /*noReductions*/ true);
+            }, true);
         }
         function getIndexTypeOfContextualType(type, kind) {
-            return mapType(type, function (t) { return getIndexTypeOfStructuredType(t, kind); }, /*noReductions*/ true);
+            return mapType(type, function (t) { return getIndexTypeOfStructuredType(t, kind); }, true);
         }
-        // Return true if the given contextual type is a tuple-like type
         function contextualTypeIsTupleLikeType(type) {
-            return !!(type.flags & 262144 /* Union */ ? ts.forEach(type.types, isTupleLikeType) : isTupleLikeType(type));
+            return !!(type.flags & 262144 ? ts.forEach(type.types, isTupleLikeType) : isTupleLikeType(type));
         }
-        // In an object literal contextually typed by a type T, the contextual type of a property assignment is the type of
-        // the matching property in T, if one exists. Otherwise, it is the type of the numeric index signature in T, if one
-        // exists. Otherwise, it is the type of the string index signature in T, if one exists.
         function getContextualTypeForObjectLiteralMethod(node) {
             ts.Debug.assert(ts.isObjectLiteralMethod(node));
-            if (node.flags & 8388608 /* InWithStatement */) {
-                // We cannot answer semantic questions within a with block, do not proceed any further
+            if (node.flags & 8388608) {
                 return undefined;
             }
             return getContextualTypeForObjectLiteralElement(node);
@@ -43154,37 +35851,28 @@ var ts;
             var type = getApparentTypeOfContextualType(objectLiteral);
             if (type) {
                 if (!hasNonBindableDynamicName(element)) {
-                    // For a (non-symbol) computed property, there is no reason to look up the name
-                    // in the type. It will just be "__computed", which does not appear in any
-                    // SymbolTable.
                     var symbolName_1 = getSymbolOfNode(element).escapedName;
                     var propertyType = getTypeOfPropertyOfContextualType(type, symbolName_1);
                     if (propertyType) {
                         return propertyType;
                     }
                 }
-                return isNumericName(element.name) && getIndexTypeOfContextualType(type, 1 /* Number */) ||
-                    getIndexTypeOfContextualType(type, 0 /* String */);
+                return isNumericName(element.name) && getIndexTypeOfContextualType(type, 1) ||
+                    getIndexTypeOfContextualType(type, 0);
             }
             return undefined;
         }
-        // In an array literal contextually typed by a type T, the contextual type of an element expression at index N is
-        // the type of the property with the numeric name N in T, if one exists. Otherwise, if T has a numeric index signature,
-        // it is the type of the numeric index signature in T. Otherwise, in ES6 and higher, the contextual type is the iterated
-        // type of T.
         function getContextualTypeForElementExpression(arrayContextualType, index) {
             return arrayContextualType && (getTypeOfPropertyOfContextualType(arrayContextualType, "" + index)
-                || getIndexTypeOfContextualType(arrayContextualType, 1 /* Number */)
-                || getIteratedTypeOrElementType(arrayContextualType, /*errorNode*/ undefined, /*allowStringInput*/ false, /*allowAsyncIterables*/ false, /*checkAssignability*/ false));
+                || getIndexTypeOfContextualType(arrayContextualType, 1)
+                || getIteratedTypeOrElementType(arrayContextualType, undefined, false, false, false));
         }
-        // In a contextually typed conditional expression, the true/false expressions are contextually typed by the same type.
         function getContextualTypeForConditionalOperand(node) {
             var conditional = node.parent;
             return node === conditional.whenTrue || node === conditional.whenFalse ? getContextualType(conditional) : undefined;
         }
         function getContextualTypeForChildJsxExpression(node) {
             var attributesType = getApparentTypeOfContextualType(node.openingElement.tagName);
-            // JSX expression is in children of JSX Element, we will look for an "children" atttribute (we get the name from JSX.ElementAttributesProperty)
             var jsxChildrenPropertyName = getJsxElementChildrenPropertyName(getJsxNamespaceAt(node));
             return attributesType && !isTypeAny(attributesType) && jsxChildrenPropertyName && jsxChildrenPropertyName !== "" ? getTypeOfPropertyOfContextualType(attributesType, jsxChildrenPropertyName) : undefined;
         }
@@ -43197,9 +35885,6 @@ var ts;
                     : undefined;
         }
         function getContextualTypeForJsxAttribute(attribute) {
-            // When we trying to resolve JsxOpeningLikeElement as a stateless function element, we will already give its attributes a contextual type
-            // which is a type of the parameter of the signature we are trying out.
-            // If there is no contextual type (e.g. we are trying to resolve stateful component), get attributes type from resolving element's tagName
             if (ts.isJsxAttribute(attribute)) {
                 var attributesType = getApparentTypeOfContextualType(attribute.parent);
                 if (!attributesType || isTypeAny(attributesType)) {
@@ -43211,50 +35896,44 @@ var ts;
                 return getContextualType(attribute.parent);
             }
         }
-        // Return true if the given expression is possibly a discriminant value. We limit the kinds of
-        // expressions we check to those that don't depend on their contextual type in order not to cause
-        // recursive (and possibly infinite) invocations of getContextualType.
         function isPossiblyDiscriminantValue(node) {
             switch (node.kind) {
-                case 9 /* StringLiteral */:
-                case 8 /* NumericLiteral */:
-                case 13 /* NoSubstitutionTemplateLiteral */:
-                case 101 /* TrueKeyword */:
-                case 86 /* FalseKeyword */:
-                case 95 /* NullKeyword */:
-                case 71 /* Identifier */:
+                case 9:
+                case 8:
+                case 13:
+                case 101:
+                case 86:
+                case 95:
+                case 71:
                     return true;
-                case 185 /* PropertyAccessExpression */:
-                case 191 /* ParenthesizedExpression */:
+                case 185:
+                case 191:
                     return isPossiblyDiscriminantValue(node.expression);
             }
             return false;
         }
-        // Return the contextual type for a given expression node. During overload resolution, a contextual type may temporarily
-        // be "pushed" onto a node using the contextualType property.
         function getApparentTypeOfContextualType(node) {
             var contextualType = getContextualType(node);
             contextualType = contextualType && mapType(contextualType, getApparentType);
-            if (!(contextualType && contextualType.flags & 262144 /* Union */ && ts.isObjectLiteralExpression(node))) {
+            if (!(contextualType && contextualType.flags & 262144 && ts.isObjectLiteralExpression(node))) {
                 return contextualType;
             }
-            // Keep the below up-to-date with the work done within `isRelatedTo` by `findMatchingDiscriminantType`
             var match;
             propLoop: for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
                 var prop = _a[_i];
                 if (!prop.symbol)
                     continue;
-                if (prop.kind !== 270 /* PropertyAssignment */)
+                if (prop.kind !== 270)
                     continue;
                 if (isPossiblyDiscriminantValue(prop.initializer) && isDiscriminantProperty(contextualType, prop.symbol.escapedName)) {
                     var discriminatingType = checkExpression(prop.initializer);
                     for (var _b = 0, _c = contextualType.types; _b < _c.length; _b++) {
                         var type = _c[_b];
                         var targetType = getTypeOfPropertyOfType(type, prop.symbol.escapedName);
-                        if (targetType && checkTypeAssignableTo(discriminatingType, targetType, /*errorNode*/ undefined)) {
+                        if (targetType && checkTypeAssignableTo(discriminatingType, targetType, undefined)) {
                             if (match) {
                                 if (type === match)
-                                    continue; // Finding multiple fields which discriminate to the same type is fine
+                                    continue;
                                 match = undefined;
                                 break propLoop;
                             }
@@ -43265,26 +35944,8 @@ var ts;
             }
             return match || contextualType;
         }
-        /**
-         * Woah! Do you really want to use this function?
-         *
-         * Unless you're trying to get the *non-apparent* type for a
-         * value-literal type or you're authoring relevant portions of this algorithm,
-         * you probably meant to use 'getApparentTypeOfContextualType'.
-         * Otherwise this may not be very useful.
-         *
-         * In cases where you *are* working on this function, you should understand
-         * when it is appropriate to use 'getContextualType' and 'getApparentTypeOfContextualType'.
-         *
-         *   - Use 'getContextualType' when you are simply going to propagate the result to the expression.
-         *   - Use 'getApparentTypeOfContextualType' when you're going to need the members of the type.
-         *
-         * @param node the expression whose contextual type will be returned.
-         * @returns the contextual type of an expression.
-         */
         function getContextualType(node) {
-            if (node.flags & 8388608 /* InWithStatement */) {
-                // We cannot answer semantic questions within a with block, do not proceed any further
+            if (node.flags & 8388608) {
                 return undefined;
             }
             if (node.contextualType) {
@@ -43292,52 +35953,51 @@ var ts;
             }
             var parent = node.parent;
             switch (parent.kind) {
-                case 232 /* VariableDeclaration */:
-                case 149 /* Parameter */:
-                case 152 /* PropertyDeclaration */:
-                case 151 /* PropertySignature */:
-                case 182 /* BindingElement */:
+                case 232:
+                case 149:
+                case 152:
+                case 151:
+                case 182:
                     return getContextualTypeForInitializerExpression(node);
-                case 193 /* ArrowFunction */:
-                case 225 /* ReturnStatement */:
+                case 193:
+                case 225:
                     return getContextualTypeForReturnExpression(node);
-                case 203 /* YieldExpression */:
+                case 203:
                     return getContextualTypeForYieldOperand(parent);
-                case 187 /* CallExpression */:
-                case 188 /* NewExpression */:
+                case 187:
+                case 188:
                     return getContextualTypeForArgument(parent, node);
-                case 190 /* TypeAssertionExpression */:
-                case 208 /* AsExpression */:
+                case 190:
+                case 208:
                     return getTypeFromTypeNode(parent.type);
-                case 200 /* BinaryExpression */:
+                case 200:
                     return getContextualTypeForBinaryOperand(node);
-                case 270 /* PropertyAssignment */:
-                case 271 /* ShorthandPropertyAssignment */:
+                case 270:
+                case 271:
                     return getContextualTypeForObjectLiteralElement(parent);
-                case 272 /* SpreadAssignment */:
+                case 272:
                     return getApparentTypeOfContextualType(parent.parent);
-                case 183 /* ArrayLiteralExpression */: {
+                case 183: {
                     var arrayLiteral = parent;
                     var type = getApparentTypeOfContextualType(arrayLiteral);
                     return getContextualTypeForElementExpression(type, ts.indexOfNode(arrayLiteral.elements, node));
                 }
-                case 201 /* ConditionalExpression */:
+                case 201:
                     return getContextualTypeForConditionalOperand(node);
-                case 211 /* TemplateSpan */:
-                    ts.Debug.assert(parent.parent.kind === 202 /* TemplateExpression */);
+                case 211:
+                    ts.Debug.assert(parent.parent.kind === 202);
                     return getContextualTypeForSubstitutionExpression(parent.parent, node);
-                case 191 /* ParenthesizedExpression */: {
-                    // Like in `checkParenthesizedExpression`, an `/** @type {xyz} */` comment before a parenthesized expression acts as a type cast.
+                case 191: {
                     var tag = ts.isInJavaScriptFile(parent) ? ts.getJSDocTypeTag(parent) : undefined;
                     return tag ? getTypeFromTypeNode(tag.typeExpression.type) : getContextualType(parent);
                 }
-                case 265 /* JsxExpression */:
+                case 265:
                     return getContextualTypeForJsxExpression(parent);
-                case 262 /* JsxAttribute */:
-                case 264 /* JsxSpreadAttribute */:
+                case 262:
+                case 264:
                     return getContextualTypeForJsxAttribute(parent);
-                case 257 /* JsxOpeningElement */:
-                case 256 /* JsxSelfClosingElement */:
+                case 257:
+                case 256:
                     return getContextualJsxElementAttributesType(parent);
             }
             return undefined;
@@ -43352,22 +36012,16 @@ var ts;
             }
             var valueType = checkExpression(node.tagName);
             if (isTypeAny(valueType)) {
-                // Short-circuit if the class tag is using an element type 'any'
                 return anyType;
             }
             var isJs = ts.isInJavaScriptFile(node);
             return mapType(valueType, function (t) { return getJsxSignaturesParameterTypes(t, isJs, node); });
         }
         function getJsxSignaturesParameterTypes(valueType, isJs, context) {
-            // If the elemType is a string type, we have to return anyType to prevent an error downstream as we will try to find construct or call signature of the type
-            if (valueType.flags & 4 /* String */) {
+            if (valueType.flags & 4) {
                 return anyType;
             }
-            else if (valueType.flags & 64 /* StringLiteral */) {
-                // If the elemType is a stringLiteral type, we can then provide a check to make sure that the string literal type is one of the Jsx intrinsic element type
-                // For example:
-                //      var CustomTag: "h1" = "h1";
-                //      <CustomTag> Hello World </CustomTag>
+            else if (valueType.flags & 64) {
                 var intrinsicElementsType = getJsxType(JsxNames.IntrinsicElements, context);
                 if (intrinsicElementsType !== errorType) {
                     var stringLiteralTypeName = valueType.value;
@@ -43375,22 +36029,19 @@ var ts;
                     if (intrinsicProp) {
                         return getTypeOfSymbol(intrinsicProp);
                     }
-                    var indexSignatureType = getIndexTypeOfType(intrinsicElementsType, 0 /* String */);
+                    var indexSignatureType = getIndexTypeOfType(intrinsicElementsType, 0);
                     if (indexSignatureType) {
                         return indexSignatureType;
                     }
                 }
                 return anyType;
             }
-            // Resolve the signatures, preferring constructor
-            var signatures = getSignaturesOfType(valueType, 1 /* Construct */);
+            var signatures = getSignaturesOfType(valueType, 1);
             var ctor = true;
             if (signatures.length === 0) {
-                // No construct signatures, try call signatures
-                signatures = getSignaturesOfType(valueType, 0 /* Call */);
+                signatures = getSignaturesOfType(valueType, 0);
                 ctor = false;
                 if (signatures.length === 0) {
-                    // We found no signatures at all, which is an error
                     return errorType;
                 }
             }
@@ -43407,7 +36058,7 @@ var ts;
                 links.resolvedSignatures.set(cacheKey, resolvingSignaturesArray);
                 links.resolvedSignatures.set(cacheKey, signatures = instantiateJsxSignatures(context, signatures));
             }
-            return getUnionType(ts.map(signatures, ctor ? function (t) { return getJsxPropsTypeFromClassType(t, isJs, context, /*reportErrors*/ false); } : function (t) { return getJsxPropsTypeFromCallSignature(t, context); }), 0 /* None */);
+            return getUnionType(ts.map(signatures, ctor ? function (t) { return getJsxPropsTypeFromClassType(t, isJs, context, false); } : function (t) { return getJsxPropsTypeFromCallSignature(t, context); }), 0);
         }
         function getJsxPropsTypeFromCallSignature(sig, context) {
             var propsType = getTypeOfFirstParameterOfSignatureWithFallback(sig, emptyObjectType);
@@ -43424,26 +36075,20 @@ var ts;
         function getJsxPropsTypeFromClassType(sig, isJs, context, reportErrors) {
             var forcedLookupLocation = getJsxElementPropertiesName(getJsxNamespaceAt(context));
             var attributesType = forcedLookupLocation === undefined
-                // If there is no type ElementAttributesProperty, return the type of the first parameter of the signature, which should be the props type
                 ? getTypeOfFirstParameterOfSignatureWithFallback(sig, emptyObjectType)
                 : forcedLookupLocation === ""
-                    // If there is no e.g. 'props' member in ElementAttributesProperty, use the element class type instead
                     ? getReturnTypeOfSignature(sig)
-                    // Otherwise get the type of the property on the signature return type
                     : getJsxPropsTypeForSignatureFromMember(sig, forcedLookupLocation);
             if (!attributesType) {
-                // There is no property named 'props' on this instance type
                 if (reportErrors && !!forcedLookupLocation && !!ts.length(context.attributes.properties)) {
                     error(context, ts.Diagnostics.JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property, ts.unescapeLeadingUnderscores(forcedLookupLocation));
                 }
                 return emptyObjectType;
             }
             else if (isTypeAny(attributesType)) {
-                // Props is of type 'any' or unknown
                 return attributesType;
             }
             else {
-                // Normal case -- add in IntrinsicClassElements<T> and IntrinsicElements
                 var apparentAttributesType = attributesType;
                 var intrinsicClassAttribs = getJsxType(JsxNames.IntrinsicClassAttributes, context);
                 if (intrinsicClassAttribs !== errorType) {
@@ -43460,10 +36105,8 @@ var ts;
                 return apparentAttributesType;
             }
         }
-        // If the given type is an object or union type with a single signature, and if that signature has at
-        // least as many parameters as the given function, return the signature. Otherwise return undefined.
         function getContextualCallSignature(type, node) {
-            var signatures = getSignaturesOfType(type, 0 /* Call */);
+            var signatures = getSignaturesOfType(type, 0);
             if (signatures.length === 1) {
                 var signature = signatures[0];
                 if (!isAritySmaller(signature, node)) {
@@ -43471,7 +36114,6 @@ var ts;
                 }
             }
         }
-        /** If the contextual signature has fewer parameters than the function expression, do not use it */
         function isAritySmaller(signature, target) {
             var targetParameterCount = 0;
             for (; targetParameterCount < target.parameters.length; targetParameterCount++) {
@@ -43487,10 +36129,9 @@ var ts;
             return sourceLength < targetParameterCount;
         }
         function isFunctionExpressionOrArrowFunction(node) {
-            return node.kind === 192 /* FunctionExpression */ || node.kind === 193 /* ArrowFunction */;
+            return node.kind === 192 || node.kind === 193;
         }
         function getContextualSignatureForFunctionLikeDeclaration(node) {
-            // Only function expressions, arrow functions, and object literal methods are contextually typed.
             return isFunctionExpressionOrArrowFunction(node) || ts.isObjectLiteralMethod(node)
                 ? getContextualSignature(node)
                 : undefined;
@@ -43500,13 +36141,8 @@ var ts;
                 getContextualTypeForObjectLiteralMethod(node) :
                 getApparentTypeOfContextualType(node);
         }
-        // Return the contextual signature for a given expression node. A contextual type provides a
-        // contextual signature if it has a single call signature and if that call signature is non-generic.
-        // If the contextual type is a union type, get the signature from each type possible and if they are
-        // all identical ignoring their return type, the result is same signature but with return type as
-        // union type of return types from these signatures
         function getContextualSignature(node) {
-            ts.Debug.assert(node.kind !== 154 /* MethodDeclaration */ || ts.isObjectLiteralMethod(node));
+            ts.Debug.assert(node.kind !== 154 || ts.isObjectLiteralMethod(node));
             var type;
             if (ts.isInJavaScriptFile(node)) {
                 var jsdoc = ts.getJSDocType(node);
@@ -43520,7 +36156,7 @@ var ts;
             if (!type) {
                 return undefined;
             }
-            if (!(type.flags & 262144 /* Union */)) {
+            if (!(type.flags & 262144)) {
                 return getContextualCallSignature(type, node);
             }
             var signatureList;
@@ -43530,20 +36166,16 @@ var ts;
                 var signature = getContextualCallSignature(current, node);
                 if (signature) {
                     if (!signatureList) {
-                        // This signature will contribute to contextual union signature
                         signatureList = [signature];
                     }
-                    else if (!compareSignaturesIdentical(signatureList[0], signature, /*partialMatch*/ false, /*ignoreThisTypes*/ true, /*ignoreReturnTypes*/ true, compareTypesIdentical)) {
-                        // Signatures aren't identical, do not use
+                    else if (!compareSignaturesIdentical(signatureList[0], signature, false, true, true, compareTypesIdentical)) {
                         return undefined;
                     }
                     else {
-                        // Use this signature for contextual union signature
                         signatureList.push(signature);
                     }
                 }
             }
-            // Result is union of signatures collected (return type is union of return types of this signature set)
             var result;
             if (signatureList) {
                 result = cloneSignature(signatureList[0]);
@@ -43552,15 +36184,15 @@ var ts;
             return result;
         }
         function checkSpreadExpression(node, checkMode) {
-            if (languageVersion < 2 /* ES2015 */ && compilerOptions.downlevelIteration) {
-                checkExternalEmitHelpers(node, 1536 /* SpreadIncludes */);
+            if (languageVersion < 2 && compilerOptions.downlevelIteration) {
+                checkExternalEmitHelpers(node, 1536);
             }
             var arrayOrIterableType = checkExpression(node.expression, checkMode);
-            return checkIteratedTypeOrElementType(arrayOrIterableType, node.expression, /*allowStringInput*/ false, /*allowAsyncIterables*/ false);
+            return checkIteratedTypeOrElementType(arrayOrIterableType, node.expression, false, false);
         }
         function hasDefaultValue(node) {
-            return (node.kind === 182 /* BindingElement */ && !!node.initializer) ||
-                (node.kind === 200 /* BinaryExpression */ && node.operatorToken.kind === 58 /* EqualsToken */);
+            return (node.kind === 182 && !!node.initializer) ||
+                (node.kind === 200 && node.operatorToken.kind === 58);
         }
         function checkArrayLiteral(node, checkMode) {
             var elements = node.elements;
@@ -43570,22 +36202,10 @@ var ts;
             var contextualType = getApparentTypeOfContextualType(node);
             for (var index = 0; index < elements.length; index++) {
                 var e = elements[index];
-                if (inDestructuringPattern && e.kind === 204 /* SpreadElement */) {
-                    // Given the following situation:
-                    //    var c: {};
-                    //    [...c] = ["", 0];
-                    //
-                    // c is represented in the tree as a spread element in an array literal.
-                    // But c really functions as a rest element, and its purpose is to provide
-                    // a contextual type for the right hand side of the assignment. Therefore,
-                    // instead of calling checkExpression on "...c", which will give an error
-                    // if c is not iterable/array-like, we need to act as if we are trying to
-                    // get the contextual element type from it. So we do something similar to
-                    // getContextualTypeForElementExpression, which will crucially not error
-                    // if there is no index type / iterated type.
+                if (inDestructuringPattern && e.kind === 204) {
                     var restArrayType = checkExpression(e.expression, checkMode);
-                    var restElementType = getIndexTypeOfType(restArrayType, 1 /* Number */) ||
-                        getIteratedTypeOrElementType(restArrayType, /*errorNode*/ undefined, /*allowStringInput*/ false, /*allowAsyncIterables*/ false, /*checkAssignability*/ false);
+                    var restElementType = getIndexTypeOfType(restArrayType, 1) ||
+                        getIteratedTypeOrElementType(restArrayType, undefined, false, false, false);
                     if (restElementType) {
                         elementTypes.push(restElementType);
                     }
@@ -43595,11 +36215,9 @@ var ts;
                     var type = checkExpressionForMutableLocation(e, checkMode, elementContextualType);
                     elementTypes.push(type);
                 }
-                hasSpreadElement = hasSpreadElement || e.kind === 204 /* SpreadElement */;
+                hasSpreadElement = hasSpreadElement || e.kind === 204;
             }
             if (!hasSpreadElement) {
-                // If array literal is actually a destructuring pattern, mark it as an implied type. We do this such
-                // that we get the same behavior for "var [x, y] = []" and "[x, y] = []".
                 if (inDestructuringPattern && elementTypes.length) {
                     var type = cloneTypeReference(createTupleType(elementTypes));
                     type.pattern = node;
@@ -43607,9 +36225,7 @@ var ts;
                 }
                 if (contextualType && contextualTypeIsTupleLikeType(contextualType)) {
                     var pattern = contextualType.pattern;
-                    // If array literal is contextually typed by a binding pattern or an assignment pattern, pad the resulting
-                    // tuple type with the corresponding binding or assignment element types to make the lengths equal.
-                    if (pattern && (pattern.kind === 181 /* ArrayBindingPattern */ || pattern.kind === 183 /* ArrayLiteralExpression */)) {
+                    if (pattern && (pattern.kind === 181 || pattern.kind === 183)) {
                         var patternElements = pattern.elements;
                         for (var i = elementTypes.length; i < patternElements.length; i++) {
                             var patternElement = patternElements[i];
@@ -43617,7 +36233,7 @@ var ts;
                                 elementTypes.push(contextualType.typeArguments[i]);
                             }
                             else {
-                                if (patternElement.kind !== 206 /* OmittedExpression */) {
+                                if (patternElement.kind !== 206) {
                                     error(patternElement, ts.Diagnostics.Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value);
                                 }
                                 elementTypes.push(strictNullChecks ? implicitNeverType : undefinedWideningType);
@@ -43630,67 +36246,42 @@ var ts;
                 }
             }
             return createArrayType(elementTypes.length ?
-                getUnionType(elementTypes, 2 /* Subtype */) :
+                getUnionType(elementTypes, 2) :
                 strictNullChecks ? implicitNeverType : undefinedWideningType);
         }
         function isNumericName(name) {
             switch (name.kind) {
-                case 147 /* ComputedPropertyName */:
+                case 147:
                     return isNumericComputedName(name);
-                case 71 /* Identifier */:
+                case 71:
                     return isNumericLiteralName(name.escapedText);
-                case 8 /* NumericLiteral */:
-                case 9 /* StringLiteral */:
+                case 8:
+                case 9:
                     return isNumericLiteralName(name.text);
                 default:
                     return false;
             }
         }
         function isNumericComputedName(name) {
-            // It seems odd to consider an expression of type Any to result in a numeric name,
-            // but this behavior is consistent with checkIndexedAccess
-            return isTypeAssignableToKind(checkComputedPropertyName(name), 168 /* NumberLike */);
+            return isTypeAssignableToKind(checkComputedPropertyName(name), 168);
         }
         function isInfinityOrNaNString(name) {
             return name === "Infinity" || name === "-Infinity" || name === "NaN";
         }
         function isNumericLiteralName(name) {
-            // The intent of numeric names is that
-            //     - they are names with text in a numeric form, and that
-            //     - setting properties/indexing with them is always equivalent to doing so with the numeric literal 'numLit',
-            //         acquired by applying the abstract 'ToNumber' operation on the name's text.
-            //
-            // The subtlety is in the latter portion, as we cannot reliably say that anything that looks like a numeric literal is a numeric name.
-            // In fact, it is the case that the text of the name must be equal to 'ToString(numLit)' for this to hold.
-            //
-            // Consider the property name '"0xF00D"'. When one indexes with '0xF00D', they are actually indexing with the value of 'ToString(0xF00D)'
-            // according to the ECMAScript specification, so it is actually as if the user indexed with the string '"61453"'.
-            // Thus, the text of all numeric literals equivalent to '61543' such as '0xF00D', '0xf00D', '0170015', etc. are not valid numeric names
-            // because their 'ToString' representation is not equal to their original text.
-            // This is motivated by ECMA-262 sections 9.3.1, 9.8.1, 11.1.5, and 11.2.1.
-            //
-            // Here, we test whether 'ToString(ToNumber(name))' is exactly equal to 'name'.
-            // The '+' prefix operator is equivalent here to applying the abstract ToNumber operation.
-            // Applying the 'toString()' method on a number gives us the abstract ToString operation on a number.
-            //
-            // Note that this accepts the values 'Infinity', '-Infinity', and 'NaN', and that this is intentional.
-            // This is desired behavior, because when indexing with them as numeric entities, you are indexing
-            // with the strings '"Infinity"', '"-Infinity"', and '"NaN"' respectively.
             return (+name).toString() === name;
         }
         function checkComputedPropertyName(node) {
             var links = getNodeLinks(node.expression);
             if (!links.resolvedType) {
                 links.resolvedType = checkExpression(node.expression);
-                // This will allow types number, string, symbol or any. It will also allow enums, the unknown
-                // type, and any union of these types (like string | number).
-                if (links.resolvedType.flags & 24576 /* Nullable */ ||
-                    !isTypeAssignableToKind(links.resolvedType, 68 /* StringLike */ | 168 /* NumberLike */ | 3072 /* ESSymbolLike */) &&
+                if (links.resolvedType.flags & 24576 ||
+                    !isTypeAssignableToKind(links.resolvedType, 68 | 168 | 3072) &&
                         !isTypeAssignableTo(links.resolvedType, stringNumberSymbolType)) {
                     error(node, ts.Diagnostics.A_computed_property_name_must_be_of_type_string_number_symbol_or_any);
                 }
                 else {
-                    checkThatExpressionIsProperSymbolReference(node.expression, links.resolvedType, /*reportError*/ true);
+                    checkThatExpressionIsProperSymbolReference(node.expression, links.resolvedType, true);
                 }
             }
             return links.resolvedType;
@@ -43698,24 +36289,23 @@ var ts;
         function getObjectLiteralIndexInfo(propertyNodes, offset, properties, kind) {
             var propTypes = [];
             for (var i = 0; i < properties.length; i++) {
-                if (kind === 0 /* String */ || isNumericName(propertyNodes[i + offset].name)) {
+                if (kind === 0 || isNumericName(propertyNodes[i + offset].name)) {
                     propTypes.push(getTypeOfSymbol(properties[i]));
                 }
             }
-            var unionType = propTypes.length ? getUnionType(propTypes, 2 /* Subtype */) : undefinedType;
-            return createIndexInfo(unionType, /*isReadonly*/ false);
+            var unionType = propTypes.length ? getUnionType(propTypes, 2) : undefinedType;
+            return createIndexInfo(unionType, false);
         }
         function checkObjectLiteral(node, checkMode) {
             var inDestructuringPattern = ts.isAssignmentTarget(node);
-            // Grammar checking
             checkGrammarObjectLiteralExpression(node, inDestructuringPattern);
             var propertiesTable;
             var propertiesArray = [];
             var spread = emptyObjectType;
-            var propagatedFlags = 33554432 /* FreshLiteral */;
+            var propagatedFlags = 33554432;
             var contextualType = getApparentTypeOfContextualType(node);
             var contextualTypeHasPattern = contextualType && contextualType.pattern &&
-                (contextualType.pattern.kind === 180 /* ObjectBindingPattern */ || contextualType.pattern.kind === 184 /* ObjectLiteralExpression */);
+                (contextualType.pattern.kind === 180 || contextualType.pattern.kind === 184);
             var isInJSFile = ts.isInJavaScriptFile(node) && !ts.isInJsonFile(node);
             var isJSObjectLiteral = !contextualType && isInJSFile;
             var typeFlags = 0;
@@ -43725,7 +36315,6 @@ var ts;
             if (isInJSFile) {
                 var decl = ts.getDeclarationOfJSInitializer(node);
                 if (decl) {
-                    // a JS object literal whose declaration's symbol has exports is a JS namespace
                     var symbol = getSymbolOfNode(decl);
                     if (symbol && ts.hasEntries(symbol.exports)) {
                         propertiesTable = symbol.exports;
@@ -43739,13 +36328,13 @@ var ts;
             for (var i = 0; i < node.properties.length; i++) {
                 var memberDecl = node.properties[i];
                 var member = getSymbolOfNode(memberDecl);
-                var computedNameType = memberDecl.name && memberDecl.name.kind === 147 /* ComputedPropertyName */ && !ts.isWellKnownSymbolSyntactically(memberDecl.name.expression) ?
+                var computedNameType = memberDecl.name && memberDecl.name.kind === 147 && !ts.isWellKnownSymbolSyntactically(memberDecl.name.expression) ?
                     checkComputedPropertyName(memberDecl.name) : undefined;
-                if (memberDecl.kind === 270 /* PropertyAssignment */ ||
-                    memberDecl.kind === 271 /* ShorthandPropertyAssignment */ ||
+                if (memberDecl.kind === 270 ||
+                    memberDecl.kind === 271 ||
                     ts.isObjectLiteralMethod(memberDecl)) {
-                    var type = memberDecl.kind === 270 /* PropertyAssignment */ ? checkPropertyAssignment(memberDecl, checkMode) :
-                        memberDecl.kind === 271 /* ShorthandPropertyAssignment */ ? checkExpressionForMutableLocation(memberDecl.name, checkMode) :
+                    var type = memberDecl.kind === 270 ? checkPropertyAssignment(memberDecl, checkMode) :
+                        memberDecl.kind === 271 ? checkExpressionForMutableLocation(memberDecl.name, checkMode) :
                             checkObjectLiteralMethod(memberDecl, checkMode);
                     if (isInJSFile) {
                         var jsDocType = getTypeForDeclarationFromJSDocComment(memberDecl);
@@ -43755,31 +36344,27 @@ var ts;
                         }
                     }
                     typeFlags |= type.flags;
-                    var nameType = computedNameType && computedNameType.flags & 2240 /* StringOrNumberLiteralOrUnique */ ?
+                    var nameType = computedNameType && computedNameType.flags & 2240 ?
                         computedNameType : undefined;
                     var prop = nameType ?
-                        createSymbol(4 /* Property */ | member.flags, getLateBoundNameFromType(nameType), 1024 /* Late */) :
-                        createSymbol(4 /* Property */ | member.flags, member.escapedName);
+                        createSymbol(4 | member.flags, getLateBoundNameFromType(nameType), 1024) :
+                        createSymbol(4 | member.flags, member.escapedName);
                     if (nameType) {
                         prop.nameType = nameType;
                     }
                     if (inDestructuringPattern) {
-                        // If object literal is an assignment pattern and if the assignment pattern specifies a default value
-                        // for the property, make the property optional.
-                        var isOptional = (memberDecl.kind === 270 /* PropertyAssignment */ && hasDefaultValue(memberDecl.initializer)) ||
-                            (memberDecl.kind === 271 /* ShorthandPropertyAssignment */ && memberDecl.objectAssignmentInitializer);
+                        var isOptional = (memberDecl.kind === 270 && hasDefaultValue(memberDecl.initializer)) ||
+                            (memberDecl.kind === 271 && memberDecl.objectAssignmentInitializer);
                         if (isOptional) {
-                            prop.flags |= 16777216 /* Optional */;
+                            prop.flags |= 16777216;
                         }
                     }
-                    else if (contextualTypeHasPattern && !(ts.getObjectFlags(contextualType) & 512 /* ObjectLiteralPatternWithComputedProperties */)) {
-                        // If object literal is contextually typed by the implied type of a binding pattern, and if the
-                        // binding pattern specifies a default value for the property, make the property optional.
+                    else if (contextualTypeHasPattern && !(ts.getObjectFlags(contextualType) & 512)) {
                         var impliedProp = getPropertyOfType(contextualType, member.escapedName);
                         if (impliedProp) {
-                            prop.flags |= impliedProp.flags & 16777216 /* Optional */;
+                            prop.flags |= impliedProp.flags & 16777216;
                         }
-                        else if (!compilerOptions.suppressExcessPropertyErrors && !getIndexInfoOfType(contextualType, 0 /* String */)) {
+                        else if (!compilerOptions.suppressExcessPropertyErrors && !getIndexInfoOfType(contextualType, 0)) {
                             error(memberDecl.name, ts.Diagnostics.Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1, symbolToString(member), typeToString(contextualType));
                         }
                     }
@@ -43792,12 +36377,12 @@ var ts;
                     prop.target = member;
                     member = prop;
                 }
-                else if (memberDecl.kind === 272 /* SpreadAssignment */) {
-                    if (languageVersion < 2 /* ES2015 */) {
-                        checkExternalEmitHelpers(memberDecl, 2 /* Assign */);
+                else if (memberDecl.kind === 272) {
+                    if (languageVersion < 2) {
+                        checkExternalEmitHelpers(memberDecl, 2);
                     }
                     if (propertiesArray.length > 0) {
-                        spread = getSpreadType(spread, createObjectLiteralType(), node.symbol, propagatedFlags, /*objectFlags*/ 0);
+                        spread = getSpreadType(spread, createObjectLiteralType(), node.symbol, propagatedFlags, 0);
                         propertiesArray = [];
                         propertiesTable = ts.createSymbolTable();
                         hasComputedStringProperty = false;
@@ -43809,20 +36394,15 @@ var ts;
                         error(memberDecl, ts.Diagnostics.Spread_types_may_only_be_created_from_object_types);
                         return errorType;
                     }
-                    spread = getSpreadType(spread, type, node.symbol, propagatedFlags, /*objectFlags*/ 0);
+                    spread = getSpreadType(spread, type, node.symbol, propagatedFlags, 0);
                     offset = i + 1;
                     continue;
                 }
                 else {
-                    // TypeScript 1.0 spec (April 2014)
-                    // A get accessor declaration is processed in the same manner as
-                    // an ordinary function declaration(section 6.1) with no parameters.
-                    // A set accessor declaration is processed in the same manner
-                    // as an ordinary function declaration with a single parameter and a Void return type.
-                    ts.Debug.assert(memberDecl.kind === 156 /* GetAccessor */ || memberDecl.kind === 157 /* SetAccessor */);
+                    ts.Debug.assert(memberDecl.kind === 156 || memberDecl.kind === 157);
                     checkNodeDeferred(memberDecl);
                 }
-                if (computedNameType && !(computedNameType.flags & 2240 /* StringOrNumberLiteralOrUnique */)) {
+                if (computedNameType && !(computedNameType.flags & 2240)) {
                     if (isTypeAssignableTo(computedNameType, stringNumberSymbolType)) {
                         if (isTypeAssignableTo(computedNameType, numberType)) {
                             hasComputedNumberProperty = true;
@@ -43840,13 +36420,11 @@ var ts;
                 }
                 propertiesArray.push(member);
             }
-            // If object literal is contextually typed by the implied type of a binding pattern, augment the result
-            // type with those properties for which the binding pattern specifies a default value.
             if (contextualTypeHasPattern) {
                 for (var _i = 0, _a = getPropertiesOfType(contextualType); _i < _a.length; _i++) {
                     var prop = _a[_i];
                     if (!propertiesTable.get(prop.escapedName) && !(spread && getPropertyOfType(spread, prop.escapedName))) {
-                        if (!(prop.flags & 16777216 /* Optional */)) {
+                        if (!(prop.flags & 16777216)) {
                             error(prop.valueDeclaration || prop.bindingElement, ts.Diagnostics.Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value);
                         }
                         propertiesTable.set(prop.escapedName, prop);
@@ -43856,44 +36434,42 @@ var ts;
             }
             if (spread !== emptyObjectType) {
                 if (propertiesArray.length > 0) {
-                    spread = getSpreadType(spread, createObjectLiteralType(), node.symbol, propagatedFlags, /*objectFlags*/ 0);
+                    spread = getSpreadType(spread, createObjectLiteralType(), node.symbol, propagatedFlags, 0);
                 }
                 return spread;
             }
             return createObjectLiteralType();
             function createObjectLiteralType() {
-                var stringIndexInfo = isJSObjectLiteral ? jsObjectLiteralIndexInfo : hasComputedStringProperty ? getObjectLiteralIndexInfo(node.properties, offset, propertiesArray, 0 /* String */) : undefined;
-                var numberIndexInfo = hasComputedNumberProperty && !isJSObjectLiteral ? getObjectLiteralIndexInfo(node.properties, offset, propertiesArray, 1 /* Number */) : undefined;
+                var stringIndexInfo = isJSObjectLiteral ? jsObjectLiteralIndexInfo : hasComputedStringProperty ? getObjectLiteralIndexInfo(node.properties, offset, propertiesArray, 0) : undefined;
+                var numberIndexInfo = hasComputedNumberProperty && !isJSObjectLiteral ? getObjectLiteralIndexInfo(node.properties, offset, propertiesArray, 1) : undefined;
                 var result = createAnonymousType(node.symbol, propertiesTable, ts.emptyArray, ts.emptyArray, stringIndexInfo, numberIndexInfo);
-                var freshObjectLiteralFlag = compilerOptions.suppressExcessPropertyErrors ? 0 : 33554432 /* FreshLiteral */;
-                result.flags |= 268435456 /* ContainsObjectLiteral */ | freshObjectLiteralFlag | (typeFlags & 939524096 /* PropagatingFlags */);
-                result.objectFlags |= 128 /* ObjectLiteral */;
+                var freshObjectLiteralFlag = compilerOptions.suppressExcessPropertyErrors ? 0 : 33554432;
+                result.flags |= 268435456 | freshObjectLiteralFlag | (typeFlags & 939524096);
+                result.objectFlags |= 128;
                 if (patternWithComputedProperties) {
-                    result.objectFlags |= 512 /* ObjectLiteralPatternWithComputedProperties */;
+                    result.objectFlags |= 512;
                 }
                 if (inDestructuringPattern) {
                     result.pattern = node;
                 }
-                if (!(result.flags & 24576 /* Nullable */)) {
-                    propagatedFlags |= (result.flags & 939524096 /* PropagatingFlags */);
+                if (!(result.flags & 24576)) {
+                    propagatedFlags |= (result.flags & 939524096);
                 }
                 return result;
             }
         }
         function isValidSpreadType(type) {
-            return !!(type.flags & (3 /* AnyOrUnknown */ | 16777216 /* NonPrimitive */) ||
-                getFalsyFlags(type) & 29120 /* DefinitelyFalsy */ && isValidSpreadType(removeDefinitelyFalsyTypes(type)) ||
-                type.flags & 131072 /* Object */ && !isGenericMappedType(type) ||
-                type.flags & 786432 /* UnionOrIntersection */ && ts.every(type.types, isValidSpreadType));
+            return !!(type.flags & (3 | 16777216) ||
+                getFalsyFlags(type) & 29120 && isValidSpreadType(removeDefinitelyFalsyTypes(type)) ||
+                type.flags & 131072 && !isGenericMappedType(type) ||
+                type.flags & 786432 && ts.every(type.types, isValidSpreadType));
         }
         function checkJsxSelfClosingElement(node, checkMode) {
             checkJsxOpeningLikeElementOrOpeningFragment(node, checkMode);
             return getJsxElementTypeAt(node) || anyType;
         }
         function checkJsxElement(node, checkMode) {
-            // Check attributes
             checkJsxOpeningLikeElementOrOpeningFragment(node.openingElement, checkMode);
-            // Perform resolution on the closing tag so that rename/go to definition/etc work
             if (isJsxIntrinsicIdentifier(node.closingElement.tagName)) {
                 getIntrinsicTagSymbol(node.closingElement);
             }
@@ -43904,30 +36480,22 @@ var ts;
         }
         function checkJsxFragment(node, checkMode) {
             checkJsxOpeningLikeElementOrOpeningFragment(node.openingFragment, checkMode);
-            if (compilerOptions.jsx === 2 /* React */ && (compilerOptions.jsxFactory || ts.getSourceFileOfNode(node).pragmas.has("jsx"))) {
+            if (compilerOptions.jsx === 2 && (compilerOptions.jsxFactory || ts.getSourceFileOfNode(node).pragmas.has("jsx"))) {
                 error(node, compilerOptions.jsxFactory
                     ? ts.Diagnostics.JSX_fragment_is_not_supported_when_using_jsxFactory
                     : ts.Diagnostics.JSX_fragment_is_not_supported_when_using_an_inline_JSX_factory_pragma);
             }
             return getJsxElementTypeAt(node) || anyType;
         }
-        /**
-         * Returns true iff the JSX element name would be a valid JS identifier, ignoring restrictions about keywords not being identifiers
-         */
         function isUnhyphenatedJsxName(name) {
-            // - is the only character supported in JSX attribute names that isn't valid in JavaScript identifiers
             return !ts.stringContains(name, "-");
         }
-        /**
-         * Returns true iff React would emit this tag name as a string rather than an identifier or qualified name
-         */
         function isJsxIntrinsicIdentifier(tagName) {
-            // TODO (yuisu): comment
             switch (tagName.kind) {
-                case 185 /* PropertyAccessExpression */:
-                case 99 /* ThisKeyword */:
+                case 185:
+                case 99:
                     return false;
-                case 71 /* Identifier */:
+                case 71:
                     return ts.isIntrinsicJsxName(tagName.escapedText);
                 default:
                     return ts.Debug.fail();
@@ -43936,17 +36504,8 @@ var ts;
         function checkJsxAttribute(node, checkMode) {
             return node.initializer
                 ? checkExpressionForMutableLocation(node.initializer, checkMode)
-                : trueType; // <Elem attr /> is sugar for <Elem attr={true} />
-        }
-        /**
-         * Get attributes type of the JSX opening-like element. The result is from resolving "attributes" property of the opening-like element.
-         *
-         * @param openingLikeElement a JSX opening-like element
-         * @param filter a function to remove attributes that will not participate in checking whether attributes are assignable
-         * @return an anonymous type (similar to the one returned by checkObjectLiteral) in which its properties are attributes property.
-         * @remarks Because this function calls getSpreadType, it needs to use the same checks as checkObjectLiteral,
-         * which also calls getSpreadType.
-         */
+                : trueType;
+        }
         function createJsxAttributesTypeFromAttributesProperty(openingLikeElement, checkMode) {
             var attributes = openingLikeElement.attributes;
             var attributesTable = ts.createSymbolTable();
@@ -43960,7 +36519,7 @@ var ts;
                 var member = attributeDecl.symbol;
                 if (ts.isJsxAttribute(attributeDecl)) {
                     var exprType = checkJsxAttribute(attributeDecl, checkMode);
-                    var attributeSymbol = createSymbol(4 /* Property */ | 33554432 /* Transient */ | member.flags, member.escapedName);
+                    var attributeSymbol = createSymbol(4 | 33554432 | member.flags, member.escapedName);
                     attributeSymbol.declarations = member.declarations;
                     attributeSymbol.parent = member.parent;
                     if (member.valueDeclaration) {
@@ -43974,9 +36533,9 @@ var ts;
                     }
                 }
                 else {
-                    ts.Debug.assert(attributeDecl.kind === 264 /* JsxSpreadAttribute */);
+                    ts.Debug.assert(attributeDecl.kind === 264);
                     if (attributesTable.size > 0) {
-                        spread = getSpreadType(spread, createJsxAttributesType(), attributes.symbol, /*typeFlags*/ 0, 4096 /* JsxAttributes */);
+                        spread = getSpreadType(spread, createJsxAttributesType(), attributes.symbol, 0, 4096);
                         attributesTable = ts.createSymbolTable();
                     }
                     var exprType = checkExpressionCached(attributeDecl.expression, checkMode);
@@ -43984,7 +36543,7 @@ var ts;
                         hasSpreadAnyType = true;
                     }
                     if (isValidSpreadType(exprType)) {
-                        spread = getSpreadType(spread, exprType, openingLikeElement.symbol, /*typeFlags*/ 0, 4096 /* JsxAttributes */);
+                        spread = getSpreadType(spread, exprType, openingLikeElement.symbol, 0, 4096);
                     }
                     else {
                         typeToIntersect = typeToIntersect ? getIntersectionType([typeToIntersect, exprType]) : exprType;
@@ -43993,29 +36552,23 @@ var ts;
             }
             if (!hasSpreadAnyType) {
                 if (attributesTable.size > 0) {
-                    spread = getSpreadType(spread, createJsxAttributesType(), attributes.symbol, /*typeFlags*/ 0, 4096 /* JsxAttributes */);
+                    spread = getSpreadType(spread, createJsxAttributesType(), attributes.symbol, 0, 4096);
                 }
             }
-            // Handle children attribute
-            var parent = openingLikeElement.parent.kind === 255 /* JsxElement */ ? openingLikeElement.parent : undefined;
-            // We have to check that openingElement of the parent is the one we are visiting as this may not be true for selfClosingElement
+            var parent = openingLikeElement.parent.kind === 255 ? openingLikeElement.parent : undefined;
             if (parent && parent.openingElement === openingLikeElement && parent.children.length > 0) {
                 var childrenTypes = checkJsxChildren(parent, checkMode);
                 if (!hasSpreadAnyType && jsxChildrenPropertyName && jsxChildrenPropertyName !== "") {
-                    // Error if there is a attribute named "children" explicitly specified and children element.
-                    // This is because children element will overwrite the value from attributes.
-                    // Note: we will not warn "children" attribute overwritten if "children" attribute is specified in object spread.
                     if (explicitlySpecifyChildrenAttribute) {
                         error(attributes, ts.Diagnostics._0_are_specified_twice_The_attribute_named_0_will_be_overwritten, ts.unescapeLeadingUnderscores(jsxChildrenPropertyName));
                     }
-                    // If there are children in the body of JSX element, create dummy attribute "children" with the union of children types so that it will pass the attribute checking process
-                    var childrenPropSymbol = createSymbol(4 /* Property */ | 33554432 /* Transient */, jsxChildrenPropertyName);
+                    var childrenPropSymbol = createSymbol(4 | 33554432, jsxChildrenPropertyName);
                     childrenPropSymbol.type = childrenTypes.length === 1 ?
                         childrenTypes[0] :
                         createArrayType(getUnionType(childrenTypes));
                     var childPropMap = ts.createSymbolTable();
                     childPropMap.set(jsxChildrenPropertyName, childrenPropSymbol);
-                    spread = getSpreadType(spread, createAnonymousType(attributes.symbol, childPropMap, ts.emptyArray, ts.emptyArray, /*stringIndexInfo*/ undefined, /*numberIndexInfo*/ undefined), attributes.symbol, /*typeFlags*/ 0, 4096 /* JsxAttributes */);
+                    spread = getSpreadType(spread, createAnonymousType(attributes.symbol, childPropMap, ts.emptyArray, ts.emptyArray, undefined, undefined), attributes.symbol, 0, 4096);
                 }
             }
             if (hasSpreadAnyType) {
@@ -44025,15 +36578,10 @@ var ts;
                 return getIntersectionType([typeToIntersect, spread]);
             }
             return typeToIntersect || (spread === emptyObjectType ? createJsxAttributesType() : spread);
-            /**
-             * Create anonymous type from given attributes symbol table.
-             * @param symbol a symbol of JsxAttributes containing attributes corresponding to attributesTable
-             * @param attributesTable a symbol table of attributes property
-             */
             function createJsxAttributesType() {
-                var result = createAnonymousType(attributes.symbol, attributesTable, ts.emptyArray, ts.emptyArray, /*stringIndexInfo*/ undefined, /*numberIndexInfo*/ undefined);
-                result.flags |= 268435456 /* ContainsObjectLiteral */;
-                result.objectFlags |= 128 /* ObjectLiteral */ | 4096 /* JsxAttributes */;
+                var result = createAnonymousType(attributes.symbol, attributesTable, ts.emptyArray, ts.emptyArray, undefined, undefined);
+                result.flags |= 268435456;
+                result.objectFlags |= 128 | 4096;
                 return result;
             }
         }
@@ -44041,9 +36589,7 @@ var ts;
             var childrenTypes = [];
             for (var _i = 0, _a = node.children; _i < _a.length; _i++) {
                 var child = _a[_i];
-                // In React, JSX text that contains only whitespaces will be ignored so we don't want to type-check that
-                // because then type of children property will have constituent of string type.
-                if (child.kind === 10 /* JsxText */) {
+                if (child.kind === 10) {
                     if (!child.containsOnlyWhiteSpaces) {
                         childrenTypes.push(stringType);
                     }
@@ -44054,46 +36600,32 @@ var ts;
             }
             return childrenTypes;
         }
-        /**
-         * Check attributes property of opening-like element. This function is called during chooseOverload to get call signature of a JSX opening-like element.
-         * (See "checkApplicableSignatureForJsxOpeningLikeElement" for how the function is used)
-         * @param node a JSXAttributes to be resolved of its type
-         */
         function checkJsxAttributes(node, checkMode) {
             return createJsxAttributesTypeFromAttributesProperty(node.parent, checkMode);
         }
         function getJsxType(name, location) {
             var namespace = getJsxNamespaceAt(location);
             var exports = namespace && getExportsOfSymbol(namespace);
-            var typeSymbol = exports && getSymbol(exports, name, 67901928 /* Type */);
+            var typeSymbol = exports && getSymbol(exports, name, 67901928);
             return typeSymbol ? getDeclaredTypeOfSymbol(typeSymbol) : errorType;
         }
-        /**
-         * Looks up an intrinsic tag name and returns a symbol that either points to an intrinsic
-         * property (in which case nodeLinks.jsxFlags will be IntrinsicNamedElement) or an intrinsic
-         * string index signature (in which case nodeLinks.jsxFlags will be IntrinsicIndexedElement).
-         * May also return unknownSymbol if both of these lookups fail.
-         */
         function getIntrinsicTagSymbol(node) {
             var links = getNodeLinks(node);
             if (!links.resolvedSymbol) {
                 var intrinsicElementsType = getJsxType(JsxNames.IntrinsicElements, node);
                 if (intrinsicElementsType !== errorType) {
-                    // Property case
                     if (!ts.isIdentifier(node.tagName))
                         return ts.Debug.fail();
                     var intrinsicProp = getPropertyOfType(intrinsicElementsType, node.tagName.escapedText);
                     if (intrinsicProp) {
-                        links.jsxFlags |= 1 /* IntrinsicNamedElement */;
+                        links.jsxFlags |= 1;
                         return links.resolvedSymbol = intrinsicProp;
                     }
-                    // Intrinsic string indexer case
-                    var indexSignatureType = getIndexTypeOfType(intrinsicElementsType, 0 /* String */);
+                    var indexSignatureType = getIndexTypeOfType(intrinsicElementsType, 0);
                     if (indexSignatureType) {
-                        links.jsxFlags |= 2 /* IntrinsicIndexedElement */;
+                        links.jsxFlags |= 2;
                         return links.resolvedSymbol = intrinsicElementsType.symbol;
                     }
-                    // Wasn't found
                     error(node, ts.Diagnostics.Property_0_does_not_exist_on_type_1, ts.idText(node.tagName), "JSX." + JsxNames.IntrinsicElements);
                     return links.resolvedSymbol = unknownSymbol;
                 }
@@ -44114,7 +36646,7 @@ var ts;
                 var signature = signatures_3[_i];
                 if (signature.typeParameters) {
                     var isJavascript = ts.isInJavaScriptFile(node);
-                    var typeArgumentInstantiated = getJsxSignatureTypeArgumentInstantiation(signature, node, isJavascript, /*reportErrors*/ false);
+                    var typeArgumentInstantiated = getJsxSignatureTypeArgumentInstantiation(signature, node, isJavascript, false);
                     if (typeArgumentInstantiated) {
                         hasTypeArgumentError = false;
                         instantiatedSignatures.push(typeArgumentInstantiated);
@@ -44123,7 +36655,7 @@ var ts;
                         if (node.typeArguments && hasCorrectTypeArgumentArity(signature, node.typeArguments)) {
                             candidateForTypeArgumentError = signature;
                         }
-                        var inferenceContext = createInferenceContext(signature.typeParameters, signature, /*flags*/ isJavascript ? 4 /* AnyDefault */ : 0 /* None */);
+                        var inferenceContext = createInferenceContext(signature.typeParameters, signature, isJavascript ? 4 : 0);
                         var typeArguments = inferJsxTypeArguments(signature, node, inferenceContext);
                         instantiatedSignatures.push(getSignatureInstantiation(signature, typeArguments, isJavascript));
                     }
@@ -44134,9 +36666,8 @@ var ts;
             }
             if (node.typeArguments && hasTypeArgumentError) {
                 if (candidateForTypeArgumentError) {
-                    checkTypeArguments(candidateForTypeArgumentError, node.typeArguments, /*reportErrors*/ true);
+                    checkTypeArguments(candidateForTypeArgumentError, node.typeArguments, true);
                 }
-                // Length check to avoid issuing an arity error on length=0, the "Type argument list cannot be empty" grammar error alone is fine
                 else if (node.typeArguments.length !== 0) {
                     diagnostics.add(getTypeArgumentArityError(node, signatures, node.typeArguments));
                 }
@@ -44159,52 +36690,32 @@ var ts;
         }
         function getJsxNamespaceAt(location) {
             var namespaceName = getJsxNamespace(location);
-            var resolvedNamespace = resolveName(location, namespaceName, 1920 /* Namespace */, /*diagnosticMessage*/ undefined, namespaceName, /*isUse*/ false);
+            var resolvedNamespace = resolveName(location, namespaceName, 1920, undefined, namespaceName, false);
             if (resolvedNamespace) {
-                var candidate = getSymbol(getExportsOfSymbol(resolveSymbol(resolvedNamespace)), JsxNames.JSX, 1920 /* Namespace */);
+                var candidate = getSymbol(getExportsOfSymbol(resolveSymbol(resolvedNamespace)), JsxNames.JSX, 1920);
                 if (candidate) {
                     return candidate;
                 }
             }
-            // JSX global fallback
-            return getGlobalSymbol(JsxNames.JSX, 1920 /* Namespace */, /*diagnosticMessage*/ undefined); // TODO: GH#18217
+            return getGlobalSymbol(JsxNames.JSX, 1920, undefined);
         }
-        /**
-         * Look into JSX namespace and then look for container with matching name as nameOfAttribPropContainer.
-         * Get a single property from that container if existed. Report an error if there are more than one property.
-         *
-         * @param nameOfAttribPropContainer a string of value JsxNames.ElementAttributesPropertyNameContainer or JsxNames.ElementChildrenAttributeNameContainer
-         *          if other string is given or the container doesn't exist, return undefined.
-         */
         function getNameFromJsxElementAttributesContainer(nameOfAttribPropContainer, jsxNamespace) {
-            // JSX.ElementAttributesProperty | JSX.ElementChildrenAttribute [symbol]
-            var jsxElementAttribPropInterfaceSym = jsxNamespace && getSymbol(jsxNamespace.exports, nameOfAttribPropContainer, 67901928 /* Type */);
-            // JSX.ElementAttributesProperty | JSX.ElementChildrenAttribute [type]
+            var jsxElementAttribPropInterfaceSym = jsxNamespace && getSymbol(jsxNamespace.exports, nameOfAttribPropContainer, 67901928);
             var jsxElementAttribPropInterfaceType = jsxElementAttribPropInterfaceSym && getDeclaredTypeOfSymbol(jsxElementAttribPropInterfaceSym);
-            // The properties of JSX.ElementAttributesProperty | JSX.ElementChildrenAttribute
             var propertiesOfJsxElementAttribPropInterface = jsxElementAttribPropInterfaceType && getPropertiesOfType(jsxElementAttribPropInterfaceType);
             if (propertiesOfJsxElementAttribPropInterface) {
-                // Element Attributes has zero properties, so the element attributes type will be the class instance type
                 if (propertiesOfJsxElementAttribPropInterface.length === 0) {
                     return "";
                 }
-                // Element Attributes has one property, so the element attributes type will be the type of the corresponding
-                // property of the class instance type
                 else if (propertiesOfJsxElementAttribPropInterface.length === 1) {
                     return propertiesOfJsxElementAttribPropInterface[0].escapedName;
                 }
                 else if (propertiesOfJsxElementAttribPropInterface.length > 1) {
-                    // More than one property on ElementAttributesProperty is an error
                     error(jsxElementAttribPropInterfaceSym.declarations[0], ts.Diagnostics.The_global_type_JSX_0_may_not_have_more_than_one_property, ts.unescapeLeadingUnderscores(nameOfAttribPropContainer));
                 }
             }
             return undefined;
         }
-        /// e.g. "props" for React.d.ts,
-        /// or 'undefined' if ElementAttributesProperty doesn't exist (which means all
-        ///     non-intrinsic elements' attributes type is 'any'),
-        /// or '' if it has 0 properties (which means every
-        ///     non-intrinsic elements' attributes type is the element instance type)
         function getJsxElementPropertiesName(jsxNamespace) {
             return getNameFromJsxElementAttributesContainer(JsxNames.ElementAttributesPropertyNameContainer, jsxNamespace);
         }
@@ -44215,7 +36726,7 @@ var ts;
             if (!propsType) {
                 return undefined;
             }
-            if (propsType.flags & 524288 /* Intersection */) {
+            if (propsType.flags & 524288) {
                 var propsApparentType = [];
                 for (var _i = 0, _a = propsType.types; _i < _a.length; _i++) {
                     var t = _a[_i];
@@ -44225,29 +36736,17 @@ var ts;
             }
             return getApparentType(propsType);
         }
-        /**
-         * Get JSX attributes type by trying to resolve openingLikeElement as a stateless function component.
-         * Return only attributes type of successfully resolved call signature.
-         * This function assumes that the caller handled other possible element type of the JSX element (e.g. stateful component)
-         * Unlike tryGetAllJsxStatelessFunctionAttributesType, this function is a default behavior of type-checkers.
-         * @param openingLikeElement a JSX opening-like element to find attributes type
-         * @param elementType a type of the opening-like element. This elementType can't be an union type
-         * @param elemInstanceType an element instance type (the result of newing or invoking this tag)
-         * @param elementClassType a JSX-ElementClass type. This is a result of looking up ElementClass interface in the JSX global
-         */
         function defaultTryGetJsxStatelessFunctionAttributesType(openingLikeElement, elementType, elemInstanceType, elementClassType) {
-            ts.Debug.assert(!(elementType.flags & 262144 /* Union */));
+            ts.Debug.assert(!(elementType.flags & 262144));
             if (!elementClassType || !isTypeAssignableTo(elemInstanceType, elementClassType)) {
                 var jsxStatelessElementType = getJsxStatelessElementTypeAt(openingLikeElement);
                 if (jsxStatelessElementType) {
-                    // We don't call getResolvedSignature here because we have already resolve the type of JSX Element.
-                    var callSignature = getResolvedJsxStatelessFunctionSignature(openingLikeElement, elementType, /*candidatesOutArray*/ undefined);
+                    var callSignature = getResolvedJsxStatelessFunctionSignature(openingLikeElement, elementType, undefined);
                     if (callSignature !== unknownSignature) {
                         var callReturnType = callSignature && getReturnTypeOfSignature(callSignature);
                         var paramType = callReturnType && (callSignature.parameters.length === 0 ? emptyObjectType : getTypeOfSymbol(callSignature.parameters[0]));
                         paramType = getApparentTypeOfJsxPropsType(paramType);
                         if (callReturnType && isTypeAssignableTo(callReturnType, jsxStatelessElementType)) {
-                            // Intersect in JSX.IntrinsicAttributes if it exists
                             var intrinsicAttributes = getJsxType(JsxNames.IntrinsicAttributes, openingLikeElement);
                             if (intrinsicAttributes !== errorType) {
                                 paramType = intersectTypes(intrinsicAttributes, paramType);
@@ -44259,23 +36758,11 @@ var ts;
             }
             return undefined;
         }
-        /**
-         * Get JSX attributes type by trying to resolve openingLikeElement as a stateless function component.
-         * Return all attributes type of resolved call signature including candidate signatures.
-         * This function assumes that the caller handled other possible element type of the JSX element.
-         * This function is a behavior used by language service when looking up completion in JSX element.
-         * @param openingLikeElement a JSX opening-like element to find attributes type
-         * @param elementType a type of the opening-like element. This elementType can't be an union type
-         * @param elemInstanceType an element instance type (the result of newing or invoking this tag)
-         * @param elementClassType a JSX-ElementClass type. This is a result of looking up ElementClass interface in the JSX global
-         */
         function tryGetAllJsxStatelessFunctionAttributesType(openingLikeElement, elementType, elemInstanceType, elementClassType) {
-            ts.Debug.assert(!(elementType.flags & 262144 /* Union */));
+            ts.Debug.assert(!(elementType.flags & 262144));
             if (!elementClassType || !isTypeAssignableTo(elemInstanceType, elementClassType)) {
-                // Is this is a stateless function component? See if its single signature's return type is assignable to the JSX Element Type
                 var jsxStatelessElementType = getJsxStatelessElementTypeAt(openingLikeElement);
                 if (jsxStatelessElementType) {
-                    // We don't call getResolvedSignature because here we have already resolve the type of JSX Element.
                     var candidatesOutArray = [];
                     getResolvedJsxStatelessFunctionSignature(openingLikeElement, elementType, candidatesOutArray);
                     var result = void 0;
@@ -44283,7 +36770,6 @@ var ts;
                     for (var _i = 0, candidatesOutArray_1 = candidatesOutArray; _i < candidatesOutArray_1.length; _i++) {
                         var candidate = candidatesOutArray_1[_i];
                         var callReturnType = getReturnTypeOfSignature(candidate);
-                        // TODO: GH#18217: callReturnType should always be defined...
                         var paramType = callReturnType && (candidate.parameters.length === 0 ? emptyObjectType : getTypeOfSymbol(candidate.parameters[0]));
                         paramType = getApparentTypeOfJsxPropsType(paramType);
                         if (callReturnType && isTypeAssignableTo(callReturnType, jsxStatelessElementType)) {
@@ -44292,7 +36778,7 @@ var ts;
                                 var attribute = _b[_a];
                                 if (ts.isJsxAttribute(attribute) &&
                                     isUnhyphenatedJsxName(attribute.name.escapedText) &&
-                                    !getPropertyOfType(paramType, attribute.name.escapedText)) { // TODO: GH#18217
+                                    !getPropertyOfType(paramType, attribute.name.escapedText)) {
                                     shouldBeCandidate = false;
                                     break;
                                 }
@@ -44303,11 +36789,9 @@ var ts;
                             allMatchingAttributesType = intersectTypes(allMatchingAttributesType, paramType);
                         }
                     }
-                    // If we can't find any matching, just return everything.
                     if (!result) {
                         result = allMatchingAttributesType;
                     }
-                    // Intersect in JSX.IntrinsicAttributes if it exists
                     var intrinsicAttributes = getJsxType(JsxNames.IntrinsicAttributes, openingLikeElement);
                     if (intrinsicAttributes !== errorType) {
                         result = intersectTypes(intrinsicAttributes, result);
@@ -44330,62 +36814,34 @@ var ts;
                 return links.resolvedSignatures.get(cacheKey);
             }
             links.resolvedSignatures.set(cacheKey, resolvingSignaturesArray);
-            // Resolve the signatures, preferring constructor
-            var signatures = getSignaturesOfType(elementType, 1 /* Construct */);
+            var signatures = getSignaturesOfType(elementType, 1);
             if (signatures.length === 0) {
-                // No construct signatures, try call signatures
-                signatures = getSignaturesOfType(elementType, 0 /* Call */);
+                signatures = getSignaturesOfType(elementType, 0);
                 if (signatures.length === 0) {
-                    // We found no signatures at all, which is an error
                     if (reportErrors) {
                         error(openingLikeElement.tagName, ts.Diagnostics.JSX_element_type_0_does_not_have_any_construct_or_call_signatures, ts.getTextOfNode(openingLikeElement.tagName));
                     }
                     return;
                 }
             }
-            // Instantiate in context of source type
             var results = instantiateJsxSignatures(openingLikeElement, signatures);
             links.resolvedSignatures.set(cacheKey, results);
             return results;
         }
-        /**
-         * Resolve attributes type of the given opening-like element. The attributes type is a type of attributes associated with the given elementType.
-         * For instance:
-         *      declare function Foo(attr: { p1: string}): JSX.Element;
-         *      <Foo p1={10} />;  // This function will try resolve "Foo" and return an attributes type of "Foo" which is "{ p1: string }"
-         *
-         * The function is intended to initially be called from getAttributesTypeFromJsxOpeningLikeElement which already handle JSX-intrinsic-element..
-         * This function will try to resolve custom JSX attributes type in following order: string literal, stateless function, and stateful component
-         *
-         * @param openingLikeElement a non-intrinsic JSXOPeningLikeElement
-         * @param shouldIncludeAllStatelessAttributesType a boolean indicating whether to include all attributes types from all stateless function signature
-         * @param sourceAttributesType Is the attributes type the user passed, and is used to create inferences in the target type if present
-         * @param elementType an instance type of the given opening-like element. If undefined, the function will check type openinglikeElement's tagname.
-         * @param elementClassType a JSX-ElementClass type. This is a result of looking up ElementClass interface in the JSX global (imported from react.d.ts)
-         * @return attributes type if able to resolve the type of node
-         *         anyType if there is no type ElementAttributesProperty or there is an error
-         *         emptyObjectType if there is no "prop" in the element instance type
-         */
         function resolveCustomJsxElementAttributesType(openingLikeElement, shouldIncludeAllStatelessAttributesType, elementType, elementClassType) {
-            if (elementType.flags & 262144 /* Union */) {
+            if (elementType.flags & 262144) {
                 var types = elementType.types;
                 return getUnionType(types.map(function (type) {
                     return resolveCustomJsxElementAttributesType(openingLikeElement, shouldIncludeAllStatelessAttributesType, type, elementClassType);
-                }), 2 /* Subtype */);
+                }), 2);
             }
-            // Shortcircuit any
             if (isTypeAny(elementType)) {
                 return elementType;
             }
-            // If the elemType is a string type, we have to return anyType to prevent an error downstream as we will try to find construct or call signature of the type
-            else if (elementType.flags & 4 /* String */) {
+            else if (elementType.flags & 4) {
                 return anyType;
             }
-            else if (elementType.flags & 64 /* StringLiteral */) {
-                // If the elemType is a stringLiteral type, we can then provide a check to make sure that the string literal type is one of the Jsx intrinsic element type
-                // For example:
-                //      var CustomTag: "h1" = "h1";
-                //      <CustomTag> Hello World </CustomTag>
+            else if (elementType.flags & 64) {
                 var intrinsicElementsType = getJsxType(JsxNames.IntrinsicElements, openingLikeElement);
                 if (intrinsicElementsType !== errorType) {
                     var stringLiteralTypeName = elementType.value;
@@ -44393,51 +36849,41 @@ var ts;
                     if (intrinsicProp) {
                         return getTypeOfSymbol(intrinsicProp);
                     }
-                    var indexSignatureType = getIndexTypeOfType(intrinsicElementsType, 0 /* String */);
+                    var indexSignatureType = getIndexTypeOfType(intrinsicElementsType, 0);
                     if (indexSignatureType) {
                         return indexSignatureType;
                     }
                     error(openingLikeElement, ts.Diagnostics.Property_0_does_not_exist_on_type_1, stringLiteralTypeName, "JSX." + JsxNames.IntrinsicElements);
                 }
-                // If we need to report an error, we already done so here. So just return any to prevent any more error downstream
                 return anyType;
             }
-            // Get the element instance type (the result of newing or invoking this tag)
-            var instantiatedSignatures = getInstantiatedJsxSignatures(openingLikeElement, elementType, /*reportErrors*/ true);
+            var instantiatedSignatures = getInstantiatedJsxSignatures(openingLikeElement, elementType, true);
             if (!ts.length(instantiatedSignatures)) {
                 return errorType;
             }
-            var elemInstanceType = getUnionType(instantiatedSignatures.map(getReturnTypeOfSignature), 2 /* Subtype */);
-            // If we should include all stateless attributes type, then get all attributes type from all stateless function signature.
-            // Otherwise get only attributes type from the signature picked by choose-overload logic.
+            var elemInstanceType = getUnionType(instantiatedSignatures.map(getReturnTypeOfSignature), 2);
             var statelessAttributesType = shouldIncludeAllStatelessAttributesType ?
                 tryGetAllJsxStatelessFunctionAttributesType(openingLikeElement, elementType, elemInstanceType, elementClassType) :
                 defaultTryGetJsxStatelessFunctionAttributesType(openingLikeElement, elementType, elemInstanceType, elementClassType);
             if (statelessAttributesType) {
                 return statelessAttributesType;
             }
-            // Issue an error if this return type isn't assignable to JSX.ElementClass
             if (elementClassType) {
                 checkTypeRelatedTo(elemInstanceType, elementClassType, assignableRelation, openingLikeElement, ts.Diagnostics.JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements);
             }
             var isJs = ts.isInJavaScriptFile(openingLikeElement);
-            return getUnionType(instantiatedSignatures.map(function (sig) { return getJsxPropsTypeFromClassType(sig, isJs, openingLikeElement, /*reportErrors*/ true); }));
+            return getUnionType(instantiatedSignatures.map(function (sig) { return getJsxPropsTypeFromClassType(sig, isJs, openingLikeElement, true); }));
         }
-        /**
-         * Get attributes type of the given intrinsic opening-like Jsx element by resolving the tag name.
-         * The function is intended to be called from a function which has checked that the opening element is an intrinsic element.
-         * @param node an intrinsic JSX opening-like element
-         */
         function getIntrinsicAttributesTypeFromJsxOpeningLikeElement(node) {
             ts.Debug.assert(isJsxIntrinsicIdentifier(node.tagName));
             var links = getNodeLinks(node);
             if (!links.resolvedJsxElementAttributesType) {
                 var symbol = getIntrinsicTagSymbol(node);
-                if (links.jsxFlags & 1 /* IntrinsicNamedElement */) {
+                if (links.jsxFlags & 1) {
                     return links.resolvedJsxElementAttributesType = getTypeOfSymbol(symbol);
                 }
-                else if (links.jsxFlags & 2 /* IntrinsicIndexedElement */) {
-                    return links.resolvedJsxElementAttributesType = getIndexInfoOfSymbol(symbol, 0 /* String */).type;
+                else if (links.jsxFlags & 2) {
+                    return links.resolvedJsxElementAttributesType = getIndexInfoOfSymbol(symbol, 0).type;
                 }
                 else {
                     return links.resolvedJsxElementAttributesType = errorType;
@@ -44445,48 +36891,25 @@ var ts;
             }
             return links.resolvedJsxElementAttributesType;
         }
-        /**
-         * Get attributes type of the given custom opening-like JSX element.
-         * This function is intended to be called from a caller that handles intrinsic JSX element already.
-         * @param node a custom JSX opening-like element
-         * @param shouldIncludeAllStatelessAttributesType a boolean value used by language service to get all possible attributes type from an overload stateless function component
-         */
         function getCustomJsxElementAttributesType(node, shouldIncludeAllStatelessAttributesType) {
             return resolveCustomJsxElementAttributesType(node, shouldIncludeAllStatelessAttributesType, checkExpression(node.tagName), getJsxElementClassTypeAt(node));
         }
-        /**
-         * Get all possible attributes type, especially from an overload stateless function component, of the given JSX opening-like element.
-         * This function is called by language service (see: completions-tryGetGlobalSymbols).
-         * @param node a JSX opening-like element to get attributes type for
-         */
         function getAllAttributesTypeFromJsxOpeningLikeElement(node) {
             if (isJsxIntrinsicIdentifier(node.tagName)) {
                 return getIntrinsicAttributesTypeFromJsxOpeningLikeElement(node);
             }
             else {
-                // Because in language service, the given JSX opening-like element may be incomplete and therefore,
-                // we can't resolve to exact signature if the element is a stateless function component so the best thing to do is return all attributes type from all overloads.
-                return getCustomJsxElementAttributesType(node, /*shouldIncludeAllStatelessAttributesType*/ true);
+                return getCustomJsxElementAttributesType(node, true);
             }
         }
-        /**
-         * Get the attributes type, which indicates the attributes that are valid on the given JSXOpeningLikeElement.
-         * @param node a JSXOpeningLikeElement node
-         * @return an attributes type of the given node
-         */
         function getAttributesTypeFromJsxOpeningLikeElement(node) {
             if (isJsxIntrinsicIdentifier(node.tagName)) {
                 return getIntrinsicAttributesTypeFromJsxOpeningLikeElement(node);
             }
             else {
-                return getCustomJsxElementAttributesType(node, /*shouldIncludeAllStatelessAttributesType*/ false);
+                return getCustomJsxElementAttributesType(node, false);
             }
         }
-        /**
-         * Given a JSX attribute, returns the symbol for the corresponds property
-         * of the element attributes type. Will return unknownSymbol for attributes
-         * that have no matching element attributes type property.
-         */
         function getJsxAttributePropertySymbol(attrib) {
             var attributesType = getAttributesTypeFromJsxOpeningLikeElement(attrib.parent.parent);
             var prop = getPropertyOfType(attributesType, attrib.name.escapedText);
@@ -44507,16 +36930,12 @@ var ts;
                 return getUnionType([jsxElementType, nullType]);
             }
         }
-        /**
-         * Returns all the properties of the Jsx.IntrinsicElements interface
-         */
         function getJsxIntrinsicTagNamesAt(location) {
             var intrinsics = getJsxType(JsxNames.IntrinsicElements, location);
             return intrinsics ? getPropertiesOfType(intrinsics) : ts.emptyArray;
         }
         function checkJsxPreconditions(errorNode) {
-            // Preconditions for using JSX
-            if ((compilerOptions.jsx || 0 /* None */) === 0 /* None */) {
+            if ((compilerOptions.jsx || 0) === 0) {
                 error(errorNode, ts.Diagnostics.Cannot_use_JSX_unless_the_jsx_flag_is_provided);
             }
             if (getJsxElementTypeAt(errorNode) === undefined) {
@@ -44531,18 +36950,13 @@ var ts;
                 checkGrammarJsxElement(node);
             }
             checkJsxPreconditions(node);
-            // The reactNamespace/jsxFactory's root symbol should be marked as 'used' so we don't incorrectly elide its import.
-            // And if there is no reactNamespace/jsxFactory's symbol in scope when targeting React emit, we should issue an error.
-            var reactRefErr = diagnostics && compilerOptions.jsx === 2 /* React */ ? ts.Diagnostics.Cannot_find_name_0 : undefined;
+            var reactRefErr = diagnostics && compilerOptions.jsx === 2 ? ts.Diagnostics.Cannot_find_name_0 : undefined;
             var reactNamespace = getJsxNamespace(node);
             var reactLocation = isNodeOpeningLikeElement ? node.tagName : node;
-            var reactSym = resolveName(reactLocation, reactNamespace, 67216319 /* Value */, reactRefErr, reactNamespace, /*isUse*/ true);
+            var reactSym = resolveName(reactLocation, reactNamespace, 67216319, reactRefErr, reactNamespace, true);
             if (reactSym) {
-                // Mark local symbol as referenced here because it might not have been marked
-                // if jsx emit was not react as there wont be error being emitted
-                reactSym.isReferenced = 67108863 /* All */;
-                // If react symbol is alias, mark it as refereced
-                if (reactSym.flags & 2097152 /* Alias */ && !isConstEnumOrConstEnumOnlyModule(resolveAlias(reactSym))) {
+                reactSym.isReferenced = 67108863;
+                if (reactSym.flags & 2097152 && !isConstEnumOrConstEnumOnlyModule(resolveAlias(reactSym))) {
                     markAliasSymbolAsReferenced(reactSym);
                 }
             }
@@ -44553,31 +36967,17 @@ var ts;
                 checkJsxChildren(node.parent);
             }
         }
-        /**
-         * Check if a property with the given name is known anywhere in the given type. In an object type, a property
-         * is considered known if
-         * 1. the object type is empty and the check is for assignability, or
-         * 2. if the object type has index signatures, or
-         * 3. if the property is actually declared in the object type
-         *    (this means that 'toString', for example, is not usually a known property).
-         * 4. In a union or intersection type,
-         *    a property is considered known if it is known in any constituent type.
-         * @param targetType a type to search a given name in
-         * @param name a property name to search
-         * @param isComparingJsxAttributes a boolean flag indicating whether we are searching in JsxAttributesType
-         */
         function isKnownProperty(targetType, name, isComparingJsxAttributes) {
-            if (targetType.flags & 131072 /* Object */) {
+            if (targetType.flags & 131072) {
                 var resolved = resolveStructuredTypeMembers(targetType);
                 if (resolved.stringIndexInfo ||
                     resolved.numberIndexInfo && isNumericLiteralName(name) ||
                     getPropertyOfObjectType(targetType, name) ||
                     isComparingJsxAttributes && !isUnhyphenatedJsxName(name)) {
-                    // For JSXAttributes, if the attribute has a hyphenated name, consider that the attribute to be known.
                     return true;
                 }
             }
-            else if (targetType.flags & 786432 /* UnionOrIntersection */) {
+            else if (targetType.flags & 786432) {
                 for (var _i = 0, _a = targetType.types; _i < _a.length; _i++) {
                     var t = _a[_i];
                     if (isKnownProperty(t, name, isComparingJsxAttributes)) {
@@ -44587,30 +36987,12 @@ var ts;
             }
             return false;
         }
-        /**
-         * Check whether the given attributes of JSX opening-like element is assignable to the tagName attributes.
-         *      Get the attributes type of the opening-like element through resolving the tagName, "target attributes"
-         *      Check assignablity between given attributes property, "source attributes", and the "target attributes"
-         * @param openingLikeElement an opening-like JSX element to check its JSXAttributes
-         */
         function checkJsxAttributesAssignableToTagNameAttributes(openingLikeElement, checkMode) {
-            // The function involves following steps:
-            //      1. Figure out expected attributes type by resolving tagName of the JSX opening-like element, targetAttributesType.
-            //         During these steps, we will try to resolve the tagName as intrinsic name, stateless function, stateful component (in the order)
-            //      2. Solved JSX attributes type given by users, sourceAttributesType, which is by resolving "attributes" property of the JSX opening-like element.
-            //      3. Check if the two are assignable to each other
-            // targetAttributesType is a type of an attribute from resolving tagName of an opening-like JSX element.
             var targetAttributesType = isJsxIntrinsicIdentifier(openingLikeElement.tagName) ?
                 getIntrinsicAttributesTypeFromJsxOpeningLikeElement(openingLikeElement) :
-                getCustomJsxElementAttributesType(openingLikeElement, /*shouldIncludeAllStatelessAttributesType*/ false);
-            // sourceAttributesType is a type of an attributes properties.
-            // i.e <div attr1={10} attr2="string" />
-            //     attr1 and attr2 are treated as JSXAttributes attached in the JsxOpeningLikeElement as "attributes".
+                getCustomJsxElementAttributesType(openingLikeElement, false);
             var sourceAttributesType = createJsxAttributesTypeFromAttributesProperty(openingLikeElement, checkMode);
-            // Check if sourceAttributesType assignable to targetAttributesType though this check will allow excess properties
             var isSourceAttributeTypeAssignableToTarget = isTypeAssignableTo(sourceAttributesType, targetAttributesType);
-            // After we check for assignability, we will do another pass to check that all explicitly specified attributes have correct name corresponding in targetAttributeType.
-            // This will allow excess properties in spread type as it is very common pattern to spread outer attributes into React component in its render method.
             if (isSourceAttributeTypeAssignableToTarget && !isTypeAny(sourceAttributesType) && !isTypeAny(targetAttributesType)) {
                 for (var _i = 0, _a = openingLikeElement.attributes.properties; _i < _a.length; _i++) {
                     var attribute = _a[_i];
@@ -44619,38 +37001,34 @@ var ts;
                     }
                     var attrName = attribute.name;
                     var isNotIgnoredJsxProperty = (isUnhyphenatedJsxName(ts.idText(attrName)) || !!(getPropertyOfType(targetAttributesType, attrName.escapedText)));
-                    if (isNotIgnoredJsxProperty && !isKnownProperty(targetAttributesType, attrName.escapedText, /*isComparingJsxAttributes*/ true)) {
+                    if (isNotIgnoredJsxProperty && !isKnownProperty(targetAttributesType, attrName.escapedText, true)) {
                         error(attribute, ts.Diagnostics.Property_0_does_not_exist_on_type_1, ts.idText(attrName), typeToString(targetAttributesType));
-                        // We break here so that errors won't be cascading
                         break;
                     }
                 }
             }
             else if (!isSourceAttributeTypeAssignableToTarget) {
-                // Assignability failure - check each prop individually, and if that fails, fall back on the bad error span
                 if (ts.length(openingLikeElement.attributes.properties)) {
                     var reportedError = false;
-                    var _loop_5 = function (prop) {
+                    var _loop_8 = function (prop) {
                         if (ts.isJsxSpreadAttribute(prop))
                             return "continue";
                         var name = ts.idText(prop.name);
                         var sourcePropType = getIndexedAccessType(sourceAttributesType, getLiteralType(name));
                         var targetPropType = getIndexedAccessType(targetAttributesType, getLiteralType(name));
-                        var rootChain = function () { return ts.chainDiagnosticMessages(
-                        /*details*/ undefined, ts.Diagnostics.Types_of_property_0_are_incompatible, name); };
-                        if (!checkTypeAssignableTo(sourcePropType, targetPropType, prop, /*headMessage*/ undefined, rootChain)) {
+                        var rootChain = function () { return ts.chainDiagnosticMessages(undefined, ts.Diagnostics.Types_of_property_0_are_incompatible, name); };
+                        if (!checkTypeAssignableTo(sourcePropType, targetPropType, prop, undefined, rootChain)) {
                             reportedError = true;
                         }
                     };
                     for (var _b = 0, _c = openingLikeElement.attributes.properties; _b < _c.length; _b++) {
                         var prop = _c[_b];
-                        _loop_5(prop);
+                        _loop_8(prop);
                     }
                     if (reportedError) {
                         return;
                     }
                 }
-                // Report fallback error on just the component name
                 checkTypeAssignableTo(sourceAttributesType, targetAttributesType, openingLikeElement.tagName);
             }
         }
@@ -44666,86 +37044,56 @@ var ts;
                 return errorType;
             }
         }
-        // If a symbol is a synthesized symbol with no value declaration, we assume it is a property. Example of this are the synthesized
-        // '.prototype' property as well as synthesized tuple index properties.
         function getDeclarationKindFromSymbol(s) {
-            return s.valueDeclaration ? s.valueDeclaration.kind : 152 /* PropertyDeclaration */;
+            return s.valueDeclaration ? s.valueDeclaration.kind : 152;
         }
         function getDeclarationNodeFlagsFromSymbol(s) {
             return s.valueDeclaration ? ts.getCombinedNodeFlags(s.valueDeclaration) : 0;
         }
-        /**
-         * Return whether this symbol is a member of a prototype somewhere
-         * Note that this is not tracked well within the compiler, so the answer may be incorrect.
-         */
         function isPrototypeProperty(symbol) {
-            if (symbol.flags & 8192 /* Method */ || ts.getCheckFlags(symbol) & 4 /* SyntheticMethod */) {
+            if (symbol.flags & 8192 || ts.getCheckFlags(symbol) & 4) {
                 return true;
             }
             if (ts.isInJavaScriptFile(symbol.valueDeclaration)) {
                 var parent = symbol.valueDeclaration.parent;
                 return parent && ts.isBinaryExpression(parent) &&
-                    ts.getSpecialPropertyAssignmentKind(parent) === 3 /* PrototypeProperty */;
+                    ts.getSpecialPropertyAssignmentKind(parent) === 3;
             }
         }
-        /**
-         * Check whether the requested property access is valid.
-         * Returns true if node is a valid property access, and false otherwise.
-         * @param node The node to be checked.
-         * @param left The left hand side of the property access (e.g.: the super in `super.foo`).
-         * @param type The type of left.
-         * @param prop The symbol for the right hand side of the property access.
-         */
         function checkPropertyAccessibility(node, left, type, prop) {
             var flags = ts.getDeclarationModifierFlagsFromSymbol(prop);
-            var errorNode = node.kind === 185 /* PropertyAccessExpression */ || node.kind === 232 /* VariableDeclaration */ ?
+            var errorNode = node.kind === 185 || node.kind === 232 ?
                 node.name :
-                node.kind === 179 /* ImportType */ ?
+                node.kind === 179 ?
                     node :
                     node.right;
-            if (ts.getCheckFlags(prop) & 256 /* ContainsPrivate */) {
-                // Synthetic property with private constituent property
+            if (ts.getCheckFlags(prop) & 256) {
                 error(errorNode, ts.Diagnostics.Property_0_has_conflicting_declarations_and_is_inaccessible_in_type_1, symbolToString(prop), typeToString(type));
                 return false;
             }
-            if (left.kind === 97 /* SuperKeyword */) {
-                // TS 1.0 spec (April 2014): 4.8.2
-                // - In a constructor, instance member function, instance member accessor, or
-                //   instance member variable initializer where this references a derived class instance,
-                //   a super property access is permitted and must specify a public instance member function of the base class.
-                // - In a static member function or static member accessor
-                //   where this references the constructor function object of a derived class,
-                //   a super property access is permitted and must specify a public static member function of the base class.
-                if (languageVersion < 2 /* ES2015 */) {
+            if (left.kind === 97) {
+                if (languageVersion < 2) {
                     if (symbolHasNonMethodDeclaration(prop)) {
                         error(errorNode, ts.Diagnostics.Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword);
                         return false;
                     }
                 }
-                if (flags & 128 /* Abstract */) {
-                    // A method cannot be accessed in a super property access if the method is abstract.
-                    // This error could mask a private property access error. But, a member
-                    // cannot simultaneously be private and abstract, so this will trigger an
-                    // additional error elsewhere.
+                if (flags & 128) {
                     error(errorNode, ts.Diagnostics.Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression, symbolToString(prop), typeToString(getDeclaringClass(prop)));
                     return false;
                 }
             }
-            // Referencing abstract properties within their own constructors is not allowed
-            if ((flags & 128 /* Abstract */) && ts.isThisProperty(node) && symbolHasNonMethodDeclaration(prop)) {
+            if ((flags & 128) && ts.isThisProperty(node) && symbolHasNonMethodDeclaration(prop)) {
                 var declaringClassDeclaration = ts.getClassLikeDeclarationOfSymbol(getParentOfSymbol(prop));
                 if (declaringClassDeclaration && isNodeWithinConstructorOfClass(node, declaringClassDeclaration)) {
-                    error(errorNode, ts.Diagnostics.Abstract_property_0_in_class_1_cannot_be_accessed_in_the_constructor, symbolToString(prop), ts.getTextOfIdentifierOrLiteral(declaringClassDeclaration.name)); // TODO: GH#18217
+                    error(errorNode, ts.Diagnostics.Abstract_property_0_in_class_1_cannot_be_accessed_in_the_constructor, symbolToString(prop), ts.getTextOfIdentifierOrLiteral(declaringClassDeclaration.name));
                     return false;
                 }
             }
-            // Public properties are otherwise accessible.
-            if (!(flags & 24 /* NonPublicAccessibilityModifier */)) {
+            if (!(flags & 24)) {
                 return true;
             }
-            // Property is known to be private or protected at this point
-            // Private property is accessible if the property is within the declaring class
-            if (flags & 8 /* Private */) {
+            if (flags & 8) {
                 var declaringClassDeclaration = ts.getClassLikeDeclarationOfSymbol(getParentOfSymbol(prop));
                 if (!isNodeWithinClass(node, declaringClassDeclaration)) {
                     error(errorNode, ts.Diagnostics.Property_0_is_private_and_only_accessible_within_class_1, symbolToString(prop), typeToString(getDeclaringClass(prop)));
@@ -44753,36 +37101,27 @@ var ts;
                 }
                 return true;
             }
-            // Property is known to be protected at this point
-            // All protected properties of a supertype are accessible in a super access
-            if (left.kind === 97 /* SuperKeyword */) {
+            if (left.kind === 97) {
                 return true;
             }
-            // Find the first enclosing class that has the declaring classes of the protected constituents
-            // of the property as base classes
             var enclosingClass = forEachEnclosingClass(node, function (enclosingDeclaration) {
                 var enclosingClass = getDeclaredTypeOfSymbol(getSymbolOfNode(enclosingDeclaration));
                 return isClassDerivedFromDeclaringClasses(enclosingClass, prop) ? enclosingClass : undefined;
             });
-            // A protected property is accessible if the property is within the declaring class or classes derived from it
             if (!enclosingClass) {
-                // allow PropertyAccessibility if context is in function with this parameter
-                // static member access is disallow
                 var thisParameter = void 0;
-                if (flags & 32 /* Static */ || !(thisParameter = getThisParameterFromNodeContext(node)) || !thisParameter.type) {
+                if (flags & 32 || !(thisParameter = getThisParameterFromNodeContext(node)) || !thisParameter.type) {
                     error(errorNode, ts.Diagnostics.Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses, symbolToString(prop), typeToString(getDeclaringClass(prop) || type));
                     return false;
                 }
                 var thisType = getTypeFromTypeNode(thisParameter.type);
-                enclosingClass = ((thisType.flags & 65536 /* TypeParameter */) ? getConstraintFromTypeParameter(thisType) : thisType);
+                enclosingClass = ((thisType.flags & 65536) ? getConstraintFromTypeParameter(thisType) : thisType);
             }
-            // No further restrictions for static properties
-            if (flags & 32 /* Static */) {
+            if (flags & 32) {
                 return true;
             }
-            if (type.flags & 65536 /* TypeParameter */) {
-                // get the original type -- represented as the type constraint of the 'this' type
-                type = type.isThisType ? getConstraintOfTypeParameter(type) : getBaseConstraintOfType(type); // TODO: GH#18217 Use a different variable that's allowed to be undefined
+            if (type.flags & 65536) {
+                type = type.isThisType ? getConstraintOfTypeParameter(type) : getBaseConstraintOfType(type);
             }
             if (!type || !hasBaseType(type, enclosingClass)) {
                 error(errorNode, ts.Diagnostics.Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1, symbolToString(prop), typeToString(enclosingClass));
@@ -44791,31 +37130,31 @@ var ts;
             return true;
         }
         function getThisParameterFromNodeContext(node) {
-            var thisContainer = ts.getThisContainer(node, /* includeArrowFunctions */ false);
+            var thisContainer = ts.getThisContainer(node, false);
             return thisContainer && ts.isFunctionLike(thisContainer) ? ts.getThisParameter(thisContainer) : undefined;
         }
         function symbolHasNonMethodDeclaration(symbol) {
             return forEachProperty(symbol, function (prop) {
                 var propKind = getDeclarationKindFromSymbol(prop);
-                return propKind !== 154 /* MethodDeclaration */ && propKind !== 153 /* MethodSignature */;
+                return propKind !== 154 && propKind !== 153;
             });
         }
         function checkNonNullExpression(node, nullDiagnostic, undefinedDiagnostic, nullOrUndefinedDiagnostic) {
             return checkNonNullType(checkExpression(node), node, nullDiagnostic, undefinedDiagnostic, nullOrUndefinedDiagnostic);
         }
         function checkNonNullType(type, node, nullDiagnostic, undefinedDiagnostic, nullOrUndefinedDiagnostic) {
-            if (type.flags & 2 /* Unknown */) {
+            if (type.flags & 2) {
                 error(node, ts.Diagnostics.Object_is_of_type_unknown);
                 return errorType;
             }
-            var kind = (strictNullChecks ? getFalsyFlags(type) : type.flags) & 24576 /* Nullable */;
+            var kind = (strictNullChecks ? getFalsyFlags(type) : type.flags) & 24576;
             if (kind) {
-                error(node, kind & 8192 /* Undefined */ ? kind & 16384 /* Null */ ?
+                error(node, kind & 8192 ? kind & 16384 ?
                     (nullOrUndefinedDiagnostic || ts.Diagnostics.Object_is_possibly_null_or_undefined) :
                     (undefinedDiagnostic || ts.Diagnostics.Object_is_possibly_undefined) :
                     (nullDiagnostic || ts.Diagnostics.Object_is_possibly_null));
                 var t = getNonNullableType(type);
-                return t.flags & (24576 /* Nullable */ | 32768 /* Never */) ? errorType : t;
+                return t.flags & (24576 | 32768) ? errorType : t;
             }
             return type;
         }
@@ -44842,10 +37181,10 @@ var ts;
                 markAliasReferenced(parentSymbol, node);
             }
             if (!prop) {
-                var indexInfo = getIndexInfoOfType(apparentType, 0 /* String */);
+                var indexInfo = getIndexInfoOfType(apparentType, 0);
                 if (!(indexInfo && indexInfo.type)) {
                     if (right.escapedText && !checkAndReportErrorForExtendingInterface(node)) {
-                        reportNonexistentProperty(right, leftType.flags & 65536 /* TypeParameter */ && leftType.isThisType ? apparentType : leftType);
+                        reportNonexistentProperty(right, leftType.flags & 65536 && leftType.isThisType ? apparentType : leftType);
                     }
                     return errorType;
                 }
@@ -44856,7 +37195,7 @@ var ts;
             }
             else {
                 checkPropertyNotUsedBeforeDeclaration(prop, node, right);
-                markPropertyAsReferenced(prop, node, left.kind === 99 /* ThisKeyword */);
+                markPropertyAsReferenced(prop, node, left.kind === 99);
                 getNodeLinks(node).resolvedSymbol = prop;
                 checkPropertyAccessibility(node, left, apparentType, prop);
                 if (assignmentKind) {
@@ -44867,32 +37206,24 @@ var ts;
                 }
                 propType = getConstraintForLocation(getTypeOfSymbol(prop), node);
             }
-            // Only compute control flow type if this is a property access expression that isn't an
-            // assignment target, and the referenced property was declared as a variable, property,
-            // accessor, or optional method.
-            if (node.kind !== 185 /* PropertyAccessExpression */ ||
-                assignmentKind === 1 /* Definite */ ||
-                prop && !(prop.flags & (3 /* Variable */ | 4 /* Property */ | 98304 /* Accessor */)) && !(prop.flags & 8192 /* Method */ && propType.flags & 262144 /* Union */)) {
+            if (node.kind !== 185 ||
+                assignmentKind === 1 ||
+                prop && !(prop.flags & (3 | 4 | 98304)) && !(prop.flags & 8192 && propType.flags & 262144)) {
                 return propType;
             }
-            // If strict null checks and strict property initialization checks are enabled, if we have
-            // a this.xxx property access, if the property is an instance property without an initializer,
-            // and if we are in a constructor of the same class as the property declaration, assume that
-            // the property is uninitialized at the top of the control flow.
             var assumeUninitialized = false;
-            if (strictNullChecks && strictPropertyInitialization && left.kind === 99 /* ThisKeyword */) {
+            if (strictNullChecks && strictPropertyInitialization && left.kind === 99) {
                 var declaration = prop && prop.valueDeclaration;
                 if (declaration && isInstancePropertyWithoutInitializer(declaration)) {
                     var flowContainer = getControlFlowContainer(node);
-                    if (flowContainer.kind === 155 /* Constructor */ && flowContainer.parent === declaration.parent) {
+                    if (flowContainer.kind === 155 && flowContainer.parent === declaration.parent) {
                         assumeUninitialized = true;
                     }
                 }
             }
             var flowType = getFlowTypeOfReference(node, propType, assumeUninitialized ? getOptionalType(propType) : propType);
-            if (assumeUninitialized && !(getFalsyFlags(propType) & 8192 /* Undefined */) && getFalsyFlags(flowType) & 8192 /* Undefined */) {
-                error(right, ts.Diagnostics.Property_0_is_used_before_being_assigned, symbolToString(prop)); // TODO: GH#18217
-                // Return the declared type to reduce follow-on errors
+            if (assumeUninitialized && !(getFalsyFlags(propType) & 8192) && getFalsyFlags(flowType) & 8192) {
+                error(right, ts.Diagnostics.Property_0_is_used_before_being_assigned, symbolToString(prop));
                 return propType;
             }
             return assignmentKind ? getBaseTypeOfLiteralType(flowType) : flowType;
@@ -44907,9 +37238,9 @@ var ts;
                 && !isPropertyDeclaredInAncestorClass(prop)) {
                 error(right, ts.Diagnostics.Block_scoped_variable_0_used_before_its_declaration, ts.idText(right));
             }
-            else if (valueDeclaration.kind === 235 /* ClassDeclaration */ &&
-                node.parent.kind !== 162 /* TypeReference */ &&
-                !(valueDeclaration.flags & 4194304 /* Ambient */) &&
+            else if (valueDeclaration.kind === 235 &&
+                node.parent.kind !== 162 &&
+                !(valueDeclaration.flags & 4194304) &&
                 !isBlockScopedNameDeclaredBeforeUse(valueDeclaration, right)) {
                 error(right, ts.Diagnostics.Class_0_used_before_its_declaration, ts.idText(right));
             }
@@ -44917,22 +37248,17 @@ var ts;
         function isInPropertyInitializer(node) {
             return !!ts.findAncestor(node, function (node) {
                 switch (node.kind) {
-                    case 152 /* PropertyDeclaration */:
+                    case 152:
                         return true;
-                    case 270 /* PropertyAssignment */:
-                        // We might be in `a = { b: this.b }`, so keep looking. See `tests/cases/compiler/useBeforeDeclaration_propertyAssignment.ts`.
+                    case 270:
                         return false;
                     default:
                         return ts.isExpressionNode(node) ? false : "quit";
                 }
             });
         }
-        /**
-         * It's possible that "prop.valueDeclaration" is a local declaration, but the property was also declared in a superclass.
-         * In that case we won't consider it used before its declaration, because it gets its value from the superclass' declaration.
-         */
         function isPropertyDeclaredInAncestorClass(prop) {
-            if (!(prop.parent.flags & 32 /* Class */)) {
+            if (!(prop.parent.flags & 32)) {
                 return false;
             }
             var classType = getTypeOfSymbol(prop.parent);
@@ -44956,7 +37282,7 @@ var ts;
         }
         function reportNonexistentProperty(propNode, containingType) {
             var errorInfo;
-            if (containingType.flags & 262144 /* Union */ && !(containingType.flags & 32764 /* Primitive */)) {
+            if (containingType.flags & 262144 && !(containingType.flags & 32764)) {
                 for (var _i = 0, _a = containingType.types; _i < _a.length; _i++) {
                     var subtype = _a[_i];
                     if (!getPropertyOfType(subtype, propNode.escapedText)) {
@@ -44981,40 +37307,22 @@ var ts;
             diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(propNode, errorInfo));
         }
         function getSuggestionForNonexistentProperty(node, containingType) {
-            var suggestion = getSpellingSuggestionForName(ts.idText(node), getPropertiesOfType(containingType), 67216319 /* Value */);
+            var suggestion = getSpellingSuggestionForName(ts.idText(node), getPropertiesOfType(containingType), 67216319);
             return suggestion && ts.symbolName(suggestion);
         }
         function getSuggestionForNonexistentSymbol(location, outerName, meaning) {
             ts.Debug.assert(outerName !== undefined, "outername should always be defined");
-            var result = resolveNameHelper(location, outerName, meaning, /*nameNotFoundMessage*/ undefined, outerName, /*isUse*/ false, /*excludeGlobals*/ false, function (symbols, name, meaning) {
+            var result = resolveNameHelper(location, outerName, meaning, undefined, outerName, false, false, function (symbols, name, meaning) {
                 ts.Debug.assertEqual(outerName, name, "name should equal outerName");
                 var symbol = getSymbol(symbols, name, meaning);
-                // Sometimes the symbol is found when location is a return type of a function: `typeof x` and `x` is declared in the body of the function
-                // So the table *contains* `x` but `x` isn't actually in scope.
-                // However, resolveNameHelper will continue and call this callback again, so we'll eventually get a correct suggestion.
                 return symbol || getSpellingSuggestionForName(ts.unescapeLeadingUnderscores(name), ts.arrayFrom(symbols.values()), meaning);
             });
             return result && ts.symbolName(result);
         }
         function getSuggestionForNonexistentModule(name, targetModule) {
-            var suggestion = targetModule.exports && getSpellingSuggestionForName(ts.idText(name), getExportsOfModuleAsArray(targetModule), 2623475 /* ModuleMember */);
+            var suggestion = targetModule.exports && getSpellingSuggestionForName(ts.idText(name), getExportsOfModuleAsArray(targetModule), 2623475);
             return suggestion && ts.symbolName(suggestion);
         }
-        /**
-         * Given a name and a list of symbols whose names are *not* equal to the name, return a spelling suggestion if there is one that is close enough.
-         * Names less than length 3 only check for case-insensitive equality, not levenshtein distance.
-         *
-         * If there is a candidate that's the same except for case, return that.
-         * If there is a candidate that's within one edit of the name, return that.
-         * Otherwise, return the candidate with the smallest Levenshtein distance,
-         *    except for candidates:
-         *      * With no name
-         *      * Whose meaning doesn't match the `meaning` parameter.
-         *      * Whose length differs from the target name by more than 0.34 of the length of the name.
-         *      * Whose levenshtein distance is more than 0.4 of the length of the name
-         *        (0.4 allows 1 substitution/transposition for every 5 characters,
-         *         and 1 insertion/deletion at 3 characters)
-         */
         function getSpellingSuggestionForName(name, symbols, meaning) {
             return ts.getSpellingSuggestion(name, symbols, getCandidateName);
             function getCandidateName(candidate) {
@@ -45023,38 +37331,37 @@ var ts;
             }
         }
         function markPropertyAsReferenced(prop, nodeForCheckWriteOnly, isThisAccess) {
-            if (!prop || !(prop.flags & 106500 /* ClassMember */) || !prop.valueDeclaration || !ts.hasModifier(prop.valueDeclaration, 8 /* Private */)) {
+            if (!prop || !(prop.flags & 106500) || !prop.valueDeclaration || !ts.hasModifier(prop.valueDeclaration, 8)) {
                 return;
             }
-            if (nodeForCheckWriteOnly && ts.isWriteOnlyAccess(nodeForCheckWriteOnly) && !(prop.flags & 65536 /* SetAccessor */ && !(prop.flags & 32768 /* GetAccessor */))) {
+            if (nodeForCheckWriteOnly && ts.isWriteOnlyAccess(nodeForCheckWriteOnly) && !(prop.flags & 65536 && !(prop.flags & 32768))) {
                 return;
             }
             if (isThisAccess) {
-                // Find any FunctionLikeDeclaration because those create a new 'this' binding. But this should only matter for methods (or getters/setters).
                 var containingMethod = ts.findAncestor(nodeForCheckWriteOnly, ts.isFunctionLikeDeclaration);
                 if (containingMethod && containingMethod.symbol === prop) {
                     return;
                 }
             }
-            (ts.getCheckFlags(prop) & 1 /* Instantiated */ ? getSymbolLinks(prop).target : prop).isReferenced = 67108863 /* All */;
+            (ts.getCheckFlags(prop) & 1 ? getSymbolLinks(prop).target : prop).isReferenced = 67108863;
         }
         function isValidPropertyAccess(node, propertyName) {
             switch (node.kind) {
-                case 185 /* PropertyAccessExpression */:
+                case 185:
                     return isValidPropertyAccessWithType(node, node.expression, propertyName, getWidenedType(checkExpression(node.expression)));
-                case 146 /* QualifiedName */:
+                case 146:
                     return isValidPropertyAccessWithType(node, node.left, propertyName, getWidenedType(checkExpression(node.left)));
-                case 179 /* ImportType */:
+                case 179:
                     return isValidPropertyAccessWithType(node, node, propertyName, getTypeFromTypeNode(node));
             }
         }
         function isValidPropertyAccessForCompletions(node, type, property) {
-            return isValidPropertyAccessWithType(node, node.kind === 179 /* ImportType */ ? node : node.expression, property.escapedName, type)
-                && (!(property.flags & 8192 /* Method */) || isValidMethodAccess(property, type));
+            return isValidPropertyAccessWithType(node, node.kind === 179 ? node : node.expression, property.escapedName, type)
+                && (!(property.flags & 8192) || isValidMethodAccess(property, type));
         }
         function isValidMethodAccess(method, actualThisType) {
             var propType = getTypeOfPropertyOfType(actualThisType, method.escapedName);
-            var signatures = getSignaturesOfType(getNonNullableType(propType), 0 /* Call */);
+            var signatures = getSignaturesOfType(getNonNullableType(propType), 0);
             ts.Debug.assert(signatures.length !== 0);
             return signatures.some(function (sig) {
                 var signatureThisType = getThisTypeOfSignature(sig);
@@ -45065,7 +37372,7 @@ var ts;
             if (!sig.typeParameters) {
                 return signatureThisType;
             }
-            var context = createInferenceContext(sig.typeParameters, sig, 0 /* None */);
+            var context = createInferenceContext(sig.typeParameters, sig, 0);
             inferTypes(context.inferences, actualThisType, signatureThisType);
             return instantiateType(signatureThisType, createSignatureTypeMapper(sig, getInferredTypes(context)));
         }
@@ -45075,44 +37382,33 @@ var ts;
             }
             var prop = getPropertyOfType(type, propertyName);
             return prop ? checkPropertyAccessibility(node, left, type, prop)
-                // In js files properties of unions are allowed in completion
-                : ts.isInJavaScriptFile(node) && (type.flags & 262144 /* Union */) !== 0 && type.types.some(function (elementType) { return isValidPropertyAccessWithType(node, left, propertyName, elementType); });
+                : ts.isInJavaScriptFile(node) && (type.flags & 262144) !== 0 && type.types.some(function (elementType) { return isValidPropertyAccessWithType(node, left, propertyName, elementType); });
         }
-        /**
-         * Return the symbol of the for-in variable declared or referenced by the given for-in statement.
-         */
         function getForInVariableSymbol(node) {
             var initializer = node.initializer;
-            if (initializer.kind === 233 /* VariableDeclarationList */) {
+            if (initializer.kind === 233) {
                 var variable = initializer.declarations[0];
                 if (variable && !ts.isBindingPattern(variable.name)) {
                     return getSymbolOfNode(variable);
                 }
             }
-            else if (initializer.kind === 71 /* Identifier */) {
+            else if (initializer.kind === 71) {
                 return getResolvedSymbol(initializer);
             }
             return undefined;
         }
-        /**
-         * Return true if the given type is considered to have numeric property names.
-         */
         function hasNumericPropertyNames(type) {
-            return getIndexTypeOfType(type, 1 /* Number */) && !getIndexTypeOfType(type, 0 /* String */);
+            return getIndexTypeOfType(type, 1) && !getIndexTypeOfType(type, 0);
         }
-        /**
-         * Return true if given node is an expression consisting of an identifier (possibly parenthesized)
-         * that references a for-in variable for an object with numeric property names.
-         */
         function isForInVariableForNumericPropertyNames(expr) {
             var e = ts.skipParentheses(expr);
-            if (e.kind === 71 /* Identifier */) {
+            if (e.kind === 71) {
                 var symbol = getResolvedSymbol(e);
-                if (symbol.flags & 3 /* Variable */) {
+                if (symbol.flags & 3) {
                     var child = expr;
                     var node = expr.parent;
                     while (node) {
-                        if (node.kind === 221 /* ForInStatement */ &&
+                        if (node.kind === 221 &&
                             child === node.statement &&
                             getForInVariableSymbol(node) === symbol &&
                             hasNumericPropertyNames(getTypeOfExpression(node.expression))) {
@@ -45130,7 +37426,7 @@ var ts;
             var indexExpression = node.argumentExpression;
             if (!indexExpression) {
                 var sourceFile = ts.getSourceFileOfNode(node);
-                if (node.parent.kind === 188 /* NewExpression */ && node.parent.expression === node) {
+                if (node.parent.kind === 188 && node.parent.expression === node) {
                     var start = ts.skipTrivia(sourceFile.text, node.expression.end);
                     var end = node.end;
                     grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead);
@@ -45146,7 +37442,7 @@ var ts;
             if (objectType === errorType || objectType === silentNeverType) {
                 return objectType;
             }
-            if (isConstEnumObjectType(objectType) && indexExpression.kind !== 9 /* StringLiteral */) {
+            if (isConstEnumObjectType(objectType) && indexExpression.kind !== 9) {
                 error(indexExpression, ts.Diagnostics.A_const_enum_member_can_only_be_accessed_using_a_string_literal);
                 return errorType;
             }
@@ -45154,29 +37450,24 @@ var ts;
         }
         function checkThatExpressionIsProperSymbolReference(expression, expressionType, reportError) {
             if (expressionType === errorType) {
-                // There is already an error, so no need to report one.
                 return false;
             }
             if (!ts.isWellKnownSymbolSyntactically(expression)) {
                 return false;
             }
-            // Make sure the property type is the primitive symbol type
-            if ((expressionType.flags & 3072 /* ESSymbolLike */) === 0) {
+            if ((expressionType.flags & 3072) === 0) {
                 if (reportError) {
                     error(expression, ts.Diagnostics.A_computed_property_name_of_the_form_0_must_be_of_type_symbol, ts.getTextOfNode(expression));
                 }
                 return false;
             }
-            // The name is Symbol.<someName>, so make sure Symbol actually resolves to the
-            // global Symbol object
             var leftHandSide = expression.expression;
             var leftHandSideSymbol = getResolvedSymbol(leftHandSide);
             if (!leftHandSideSymbol) {
                 return false;
             }
-            var globalESSymbol = getGlobalESSymbolConstructorSymbol(/*reportErrors*/ true);
+            var globalESSymbol = getGlobalESSymbolConstructorSymbol(true);
             if (!globalESSymbol) {
-                // Already errored when we tried to look up the symbol
                 return false;
             }
             if (leftHandSideSymbol !== globalESSymbol) {
@@ -45188,19 +37479,16 @@ var ts;
             return true;
         }
         function callLikeExpressionMayHaveTypeArguments(node) {
-            // TODO: Also include tagged templates (https://github.com/Microsoft/TypeScript/issues/11947)
             return ts.isCallOrNewExpression(node);
         }
         function resolveUntypedCall(node) {
             if (callLikeExpressionMayHaveTypeArguments(node)) {
-                // Check type arguments even though we will give an error that untyped calls may not accept type arguments.
-                // This gets us diagnostics for the type arguments and marks them as referenced.
                 ts.forEach(node.typeArguments, checkSourceElement);
             }
-            if (node.kind === 189 /* TaggedTemplateExpression */) {
+            if (node.kind === 189) {
                 checkExpression(node.template);
             }
-            else if (node.kind !== 150 /* Decorator */) {
+            else if (node.kind !== 150) {
                 ts.forEach(node.arguments, function (argument) {
                     checkExpression(argument);
                 });
@@ -45211,14 +37499,6 @@ var ts;
             resolveUntypedCall(node);
             return unknownSignature;
         }
-        // Re-order candidate signatures into the result array. Assumes the result array to be empty.
-        // The candidate list orders groups in reverse, but within a group signatures are kept in declaration order
-        // A nit here is that we reorder only signatures that belong to the same symbol,
-        // so order how inherited signatures are processed is still preserved.
-        // interface A { (x: string): void }
-        // interface B extends A { (x: 'foo'): string }
-        // const b: B;
-        // b('foo') // <- here overloads should be processed as [(x:'foo'): string, (x: string): void]
         function reorderCandidates(signatures, result) {
             var lastParent;
             var lastSymbol;
@@ -45241,20 +37521,13 @@ var ts;
                     }
                 }
                 else {
-                    // current declaration belongs to a different symbol
-                    // set cutoffIndex so re-orderings in the future won't change result set from 0 to cutoffIndex
                     index = cutoffIndex = result.length;
                     lastParent = parent;
                 }
                 lastSymbol = symbol;
-                // specialized signatures always need to be placed before non-specialized signatures regardless
-                // of the cutoff position; see GH#1133
                 if (signature.hasLiteralTypes) {
                     specializedIndex++;
                     spliceIndex = specializedIndex;
-                    // The cutoff index always needs to be greater than or equal to the specialized signature index
-                    // in order to prevent non-specialized signatures from being added before a specialized
-                    // signature.
                     cutoffIndex++;
                 }
                 else {
@@ -45266,7 +37539,7 @@ var ts;
         function getSpreadArgumentIndex(args) {
             for (var i = 0; i < args.length; i++) {
                 var arg = args[i];
-                if (arg && arg.kind === 204 /* SpreadElement */) {
+                if (arg && arg.kind === 204) {
                     return i;
                 }
             }
@@ -45274,46 +37547,36 @@ var ts;
         }
         function hasCorrectArity(node, args, signature, signatureHelpTrailingComma) {
             if (signatureHelpTrailingComma === void 0) { signatureHelpTrailingComma = false; }
-            var argCount; // Apparent number of arguments we will have in this call
-            var typeArguments; // Type arguments (undefined if none)
-            var callIsIncomplete = false; // In incomplete call we want to be lenient when we have too few arguments
+            var argCount;
+            var typeArguments;
+            var callIsIncomplete = false;
             var spreadArgIndex = -1;
             if (ts.isJsxOpeningLikeElement(node)) {
-                // The arity check will be done in "checkApplicableSignatureForJsxOpeningLikeElement".
                 return true;
             }
-            if (node.kind === 189 /* TaggedTemplateExpression */) {
-                // Even if the call is incomplete, we'll have a missing expression as our last argument,
-                // so we can say the count is just the arg list length
+            if (node.kind === 189) {
                 argCount = args.length;
                 typeArguments = node.typeArguments;
-                if (node.template.kind === 202 /* TemplateExpression */) {
-                    // If a tagged template expression lacks a tail literal, the call is incomplete.
-                    // Specifically, a template only can end in a TemplateTail or a Missing literal.
-                    var lastSpan = ts.last(node.template.templateSpans); // we should always have at least one span.
+                if (node.template.kind === 202) {
+                    var lastSpan = ts.last(node.template.templateSpans);
                     callIsIncomplete = ts.nodeIsMissing(lastSpan.literal) || !!lastSpan.literal.isUnterminated;
                 }
                 else {
-                    // If the template didn't end in a backtick, or its beginning occurred right prior to EOF,
-                    // then this might actually turn out to be a TemplateHead in the future;
-                    // so we consider the call to be incomplete.
                     var templateLiteral = node.template;
-                    ts.Debug.assert(templateLiteral.kind === 13 /* NoSubstitutionTemplateLiteral */);
+                    ts.Debug.assert(templateLiteral.kind === 13);
                     callIsIncomplete = !!templateLiteral.isUnterminated;
                 }
             }
-            else if (node.kind === 150 /* Decorator */) {
+            else if (node.kind === 150) {
                 typeArguments = undefined;
-                argCount = getEffectiveArgumentCount(node, /*args*/ undefined, signature);
+                argCount = getEffectiveArgumentCount(node, undefined, signature);
             }
             else {
                 if (!node.arguments) {
-                    // This only happens when we have something of the form: 'new C'
-                    ts.Debug.assert(node.kind === 188 /* NewExpression */);
+                    ts.Debug.assert(node.kind === 188);
                     return signature.minArgumentCount === 0;
                 }
                 argCount = signatureHelpTrailingComma ? args.length + 1 : args.length;
-                // If we are missing the close parenthesis, the call is incomplete.
                 callIsIncomplete = node.arguments.end === node.end;
                 typeArguments = node.typeArguments;
                 spreadArgIndex = getSpreadArgumentIndex(args);
@@ -45321,30 +37584,24 @@ var ts;
             if (!hasCorrectTypeArgumentArity(signature, typeArguments)) {
                 return false;
             }
-            // If a spread argument is present, check that it corresponds to a rest parameter or at least that it's in the valid range.
             if (spreadArgIndex >= 0) {
                 return isRestParameterIndex(signature, spreadArgIndex) ||
                     signature.minArgumentCount <= spreadArgIndex && spreadArgIndex < signature.parameters.length;
             }
-            // Too many arguments implies incorrect arity.
             if (!signature.hasRestParameter && argCount > signature.parameters.length) {
                 return false;
             }
-            // If the call is incomplete, we should skip the lower bound check.
             var hasEnoughArguments = argCount >= signature.minArgumentCount;
             return callIsIncomplete || hasEnoughArguments;
         }
         function hasCorrectTypeArgumentArity(signature, typeArguments) {
-            // If the user supplied type arguments, but the number of type arguments does not match
-            // the declared number of type parameters, the call has an incorrect arity.
             var numTypeParameters = ts.length(signature.typeParameters);
             var minTypeArgumentCount = getMinTypeArgumentCount(signature.typeParameters);
             return !typeArguments ||
                 (typeArguments.length >= minTypeArgumentCount && typeArguments.length <= numTypeParameters);
         }
-        // If type has a single call signature and no other members, return that signature. Otherwise, return undefined.
         function getSingleCallSignature(type) {
-            if (type.flags & 131072 /* Object */) {
+            if (type.flags & 131072) {
                 var resolved = resolveStructuredTypeMembers(type);
                 if (resolved.callSignatures.length === 1 && resolved.constructSignatures.length === 0 &&
                     resolved.properties.length === 0 && !resolved.stringIndexInfo && !resolved.numberIndexInfo) {
@@ -45353,66 +37610,42 @@ var ts;
             }
             return undefined;
         }
-        // Instantiate a generic signature in the context of a non-generic signature (section 3.8.5 in TypeScript spec)
         function instantiateSignatureInContextOf(signature, contextualSignature, contextualMapper, compareTypes) {
-            var context = createInferenceContext(signature.typeParameters, signature, 1 /* InferUnionTypes */, compareTypes);
+            var context = createInferenceContext(signature.typeParameters, signature, 1, compareTypes);
             forEachMatchingParameterType(contextualSignature, signature, function (source, target) {
-                // Type parameters from outer context referenced by source type are fixed by instantiation of the source type
                 inferTypes(context.inferences, instantiateType(source, contextualMapper || identityMapper), target);
             });
             if (!contextualMapper) {
-                inferTypes(context.inferences, getReturnTypeOfSignature(contextualSignature), getReturnTypeOfSignature(signature), 8 /* ReturnType */);
+                inferTypes(context.inferences, getReturnTypeOfSignature(contextualSignature), getReturnTypeOfSignature(signature), 8);
             }
             return getSignatureInstantiation(signature, getInferredTypes(context), ts.isInJavaScriptFile(contextualSignature.declaration));
         }
         function inferJsxTypeArguments(signature, node, context) {
-            // Skip context sensitive pass
             var skipContextParamType = getTypeAtPosition(signature, 0);
             var checkAttrTypeSkipContextSensitive = checkExpressionWithContextualType(node.attributes, skipContextParamType, identityMapper);
             inferTypes(context.inferences, checkAttrTypeSkipContextSensitive, skipContextParamType);
-            // Standard pass
             var paramType = getTypeAtPosition(signature, 0);
             var checkAttrType = checkExpressionWithContextualType(node.attributes, paramType, context);
             inferTypes(context.inferences, checkAttrType, paramType);
             return getInferredTypes(context);
         }
         function inferTypeArguments(node, signature, args, excludeArgument, context) {
-            // Clear out all the inference results from the last time inferTypeArguments was called on this context
             for (var _i = 0, _a = context.inferences; _i < _a.length; _i++) {
                 var inference = _a[_i];
-                // As an optimization, we don't have to clear (and later recompute) inferred types
-                // for type parameters that have already been fixed on the previous call to inferTypeArguments.
-                // It would be just as correct to reset all of them. But then we'd be repeating the same work
-                // for the type parameters that were fixed, namely the work done by getInferredType.
                 if (!inference.isFixed) {
                     inference.inferredType = undefined;
                 }
             }
-            // If a contextual type is available, infer from that type to the return type of the call expression. For
-            // example, given a 'function wrap<T, U>(cb: (x: T) => U): (x: T) => U' and a call expression
-            // 'let f: (x: string) => number = wrap(s => s.length)', we infer from the declared type of 'f' to the
-            // return type of 'wrap'.
-            if (node.kind !== 150 /* Decorator */) {
+            if (node.kind !== 150) {
                 var contextualType = getContextualType(node);
                 if (contextualType) {
-                    // We clone the contextual mapper to avoid disturbing a resolution in progress for an
-                    // outer call expression. Effectively we just want a snapshot of whatever has been
-                    // inferred for any outer call expression so far.
                     var instantiatedType = instantiateType(contextualType, cloneTypeMapper(getContextualMapper(node)));
-                    // If the contextual type is a generic function type with a single call signature, we
-                    // instantiate the type with its own type parameters and type arguments. This ensures that
-                    // the type parameters are not erased to type any during type inference such that they can
-                    // be inferred as actual types from the contextual type. For example:
-                    //   declare function arrayMap<T, U>(f: (x: T) => U): (a: T[]) => U[];
-                    //   const boxElements: <A>(a: A[]) => { value: A }[] = arrayMap(value => ({ value }));
-                    // Above, the type of the 'value' parameter is inferred to be 'A'.
                     var contextualSignature = getSingleCallSignature(instantiatedType);
                     var inferenceSourceType = contextualSignature && contextualSignature.typeParameters ?
                         getOrCreateTypeFromSignature(getSignatureInstantiation(contextualSignature, contextualSignature.typeParameters, ts.isInJavaScriptFile(node))) :
                         instantiatedType;
                     var inferenceTargetType = getReturnTypeOfSignature(signature);
-                    // Inferences made from return types have lower priority than all other inferences.
-                    inferTypes(context.inferences, inferenceSourceType, inferenceTargetType, 8 /* ReturnType */);
+                    inferTypes(context.inferences, inferenceSourceType, inferenceTargetType, 8);
                 }
             }
             var thisType = getThisTypeOfSignature(signature);
@@ -45421,34 +37654,21 @@ var ts;
                 var thisArgumentType = thisArgumentNode ? checkExpression(thisArgumentNode) : voidType;
                 inferTypes(context.inferences, thisArgumentType, thisType);
             }
-            // We perform two passes over the arguments. In the first pass we infer from all arguments, but use
-            // wildcards for all context sensitive function expressions.
             var argCount = getEffectiveArgumentCount(node, args, signature);
             for (var i = 0; i < argCount; i++) {
                 var arg = getEffectiveArgument(node, args, i);
-                // If the effective argument is 'undefined', then it is an argument that is present but is synthetic.
-                if (arg === undefined || arg.kind !== 206 /* OmittedExpression */) {
+                if (arg === undefined || arg.kind !== 206) {
                     var paramType = getTypeAtPosition(signature, i);
                     var argType = getEffectiveArgumentType(node, i);
-                    // If the effective argument type is 'undefined', there is no synthetic type
-                    // for the argument. In that case, we should check the argument.
                     if (argType === undefined) {
-                        // For context sensitive arguments we pass the identityMapper, which is a signal to treat all
-                        // context sensitive function expressions as wildcards
                         var mapper = excludeArgument && excludeArgument[i] !== undefined ? identityMapper : context;
                         argType = checkExpressionWithContextualType(arg, paramType, mapper);
                     }
                     inferTypes(context.inferences, argType, paramType);
                 }
             }
-            // In the second pass we visit only context sensitive arguments, and only those that aren't excluded, this
-            // time treating function expressions normally (which may cause previously inferred type arguments to be fixed
-            // as we construct types for contextually typed parameters)
-            // Decorators will not have `excludeArgument`, as their arguments cannot be contextually typed.
-            // Tagged template expressions will always have `undefined` for `excludeArgument[0]`.
             if (excludeArgument) {
                 for (var i = 0; i < argCount; i++) {
-                    // No need to check for omitted args and template expressions, their exclusion value is always undefined
                     if (excludeArgument[i] === false) {
                         var arg = args[i];
                         var paramType = getTypeAtPosition(signature, i);
@@ -45468,7 +37688,7 @@ var ts;
                 var constraint = getConstraintOfTypeParameter(typeParameters[i]);
                 if (!constraint)
                     continue;
-                var errorInfo = reportErrors && headMessage ? (function () { return ts.chainDiagnosticMessages(/*details*/ undefined, ts.Diagnostics.Type_0_does_not_satisfy_the_constraint_1); }) : undefined;
+                var errorInfo = reportErrors && headMessage ? (function () { return ts.chainDiagnosticMessages(undefined, ts.Diagnostics.Type_0_does_not_satisfy_the_constraint_1); }) : undefined;
                 var typeArgumentHeadMessage = headMessage || ts.Diagnostics.Type_0_does_not_satisfy_the_constraint_1;
                 if (!mapper) {
                     mapper = createTypeMapper(typeParameters, typeArgumentTypes);
@@ -45480,29 +37700,14 @@ var ts;
             }
             return typeArgumentTypes;
         }
-        /**
-         * Check if the given signature can possibly be a signature called by the JSX opening-like element.
-         * @param node a JSX opening-like element we are trying to figure its call signature
-         * @param signature a candidate signature we are trying whether it is a call signature
-         * @param relation a relationship to check parameter and argument type
-         * @param excludeArgument
-         */
         function checkApplicableSignatureForJsxOpeningLikeElement(node, signature, relation) {
-            // JSX opening-like element has correct arity for stateless-function component if the one of the following condition is true:
-            //      1. callIsIncomplete
-            //      2. attributes property has same number of properties as the parameter object type.
-            //         We can figure that out by resolving attributes property and check number of properties in the resolved type
-            // If the call has correct arity, we will then check if the argument type and parameter type is assignable
-            var callIsIncomplete = node.attributes.end === node.end; // If we are missing the close "/>", the call is incomplete
+            var callIsIncomplete = node.attributes.end === node.end;
             if (callIsIncomplete) {
                 return true;
             }
             var headMessage = ts.Diagnostics.Argument_of_type_0_is_not_assignable_to_parameter_of_type_1;
-            // Stateless function components can have maximum of three arguments: "props", "context", and "updater".
-            // However "context" and "updater" are implicit and can't be specify by users. Only the first parameter, props,
-            // can be specified by users through attributes property.
             var paramType = getTypeAtPosition(signature, 0);
-            var attributesType = checkExpressionWithContextualType(node.attributes, paramType, /*contextualMapper*/ undefined);
+            var attributesType = checkExpressionWithContextualType(node.attributes, paramType, undefined);
             var argProperties = getPropertiesOfType(attributesType);
             for (var _i = 0, argProperties_1 = argProperties; _i < argProperties_1.length; _i++) {
                 var arg = argProperties_1[_i];
@@ -45510,17 +37715,14 @@ var ts;
                     return false;
                 }
             }
-            return checkTypeRelatedTo(attributesType, paramType, relation, /*errorNode*/ undefined, headMessage);
+            return checkTypeRelatedTo(attributesType, paramType, relation, undefined, headMessage);
         }
         function checkApplicableSignature(node, args, signature, relation, excludeArgument, reportErrors) {
             if (ts.isJsxOpeningLikeElement(node)) {
                 return checkApplicableSignatureForJsxOpeningLikeElement(node, signature, relation);
             }
             var thisType = getThisTypeOfSignature(signature);
-            if (thisType && thisType !== voidType && node.kind !== 188 /* NewExpression */) {
-                // If the called expression is not of the form `x.f` or `x["f"]`, then sourceType = voidType
-                // If the signature's 'this' type is voidType, then the check is skipped -- anything is compatible.
-                // If the expression is a new expression, then the check is skipped.
+            if (thisType && thisType !== voidType && node.kind !== 188) {
                 var thisArgumentNode = getThisArgumentOfCall(node);
                 var thisArgumentType = thisArgumentNode ? checkExpression(thisArgumentNode) : voidType;
                 var errorNode = reportErrors ? (thisArgumentNode || node) : undefined;
@@ -45533,19 +37735,11 @@ var ts;
             var argCount = getEffectiveArgumentCount(node, args, signature);
             for (var i = 0; i < argCount; i++) {
                 var arg = getEffectiveArgument(node, args, i);
-                // If the effective argument is 'undefined', then it is an argument that is present but is synthetic.
-                if (arg === undefined || arg.kind !== 206 /* OmittedExpression */) {
-                    // Check spread elements against rest type (from arity check we know spread argument corresponds to a rest parameter)
+                if (arg === undefined || arg.kind !== 206) {
                     var paramType = getTypeAtPosition(signature, i);
-                    // If the effective argument type is undefined, there is no synthetic type for the argument.
-                    // In that case, we should check the argument.
                     var argType = getEffectiveArgumentType(node, i) ||
                         checkExpressionWithContextualType(arg, paramType, excludeArgument && excludeArgument[i] ? identityMapper : undefined);
-                    // If one or more arguments are still excluded (as indicated by a non-null excludeArgument parameter),
-                    // we obtain the regular type of any object literal arguments because we may not have inferred complete
-                    // parameter types yet and therefore excess property checks may yield false positives (see #17041).
                     var checkArgType = excludeArgument ? getRegularTypeOfObjectLiteral(argType) : argType;
-                    // Use argument expression as error location when reporting errors
                     var errorNode = reportErrors ? getEffectiveArgumentErrorNode(node, i, arg) : undefined;
                     if (!checkTypeRelatedTo(checkArgType, paramType, relation, errorNode, headMessage)) {
                         return false;
@@ -45554,41 +37748,26 @@ var ts;
             }
             return true;
         }
-        /**
-         * Returns the this argument in calls like x.f(...) and x[f](...). Undefined otherwise.
-         */
         function getThisArgumentOfCall(node) {
-            if (node.kind === 187 /* CallExpression */) {
+            if (node.kind === 187) {
                 var callee = ts.skipOuterExpressions(node.expression);
-                if (callee.kind === 185 /* PropertyAccessExpression */ || callee.kind === 186 /* ElementAccessExpression */) {
+                if (callee.kind === 185 || callee.kind === 186) {
                     return callee.expression;
                 }
             }
         }
-        /**
-         * Returns the effective arguments for an expression that works like a function invocation.
-         *
-         * If 'node' is a CallExpression or a NewExpression, then its argument list is returned.
-         * If 'node' is a TaggedTemplateExpression, a new argument list is constructed from the substitution
-         *    expressions, where the first element of the list is `undefined`.
-         * If 'node' is a Decorator, the argument list will be `undefined`, and its arguments and types
-         *    will be supplied from calls to `getEffectiveArgumentCount` and `getEffectiveArgumentType`.
-         */
         function getEffectiveCallArguments(node) {
-            if (node.kind === 189 /* TaggedTemplateExpression */) {
+            if (node.kind === 189) {
                 var template = node.template;
-                var args_1 = [undefined]; // TODO: GH#18217
-                if (template.kind === 202 /* TemplateExpression */) {
+                var args_4 = [undefined];
+                if (template.kind === 202) {
                     ts.forEach(template.templateSpans, function (span) {
-                        args_1.push(span.expression);
+                        args_4.push(span.expression);
                     });
                 }
-                return args_1;
+                return args_4;
             }
-            else if (node.kind === 150 /* Decorator */) {
-                // For a decorator, we return undefined as we will determine
-                // the number and types of arguments for a decorator using
-                // `getEffectiveArgumentCount` and `getEffectiveArgumentType` below.
+            else if (node.kind === 150) {
                 return undefined;
             }
             else if (ts.isJsxOpeningLikeElement(node)) {
@@ -45598,45 +37777,22 @@ var ts;
                 return node.arguments || ts.emptyArray;
             }
         }
-        /**
-         * Returns the effective argument count for a node that works like a function invocation.
-         * If 'node' is a Decorator, the number of arguments is derived from the decoration
-         *    target and the signature:
-         *    If 'node.target' is a class declaration or class expression, the effective argument
-         *       count is 1.
-         *    If 'node.target' is a parameter declaration, the effective argument count is 3.
-         *    If 'node.target' is a property declaration, the effective argument count is 2.
-         *    If 'node.target' is a method or accessor declaration, the effective argument count
-         *       is 3, although it can be 2 if the signature only accepts two arguments, allowing
-         *       us to match a property decorator.
-         * Otherwise, the argument count is the length of the 'args' array.
-         */
         function getEffectiveArgumentCount(node, args, signature) {
-            if (node.kind === 150 /* Decorator */) {
+            if (node.kind === 150) {
                 switch (node.parent.kind) {
-                    case 235 /* ClassDeclaration */:
-                    case 205 /* ClassExpression */:
-                        // A class decorator will have one argument (see `ClassDecorator` in core.d.ts)
+                    case 235:
+                    case 205:
                         return 1;
-                    case 152 /* PropertyDeclaration */:
-                        // A property declaration decorator will have two arguments (see
-                        // `PropertyDecorator` in core.d.ts)
+                    case 152:
                         return 2;
-                    case 154 /* MethodDeclaration */:
-                    case 156 /* GetAccessor */:
-                    case 157 /* SetAccessor */:
-                        // A method or accessor declaration decorator will have two or three arguments (see
-                        // `PropertyDecorator` and `MethodDecorator` in core.d.ts)
-                        // If we are emitting decorators for ES3, we will only pass two arguments.
-                        if (languageVersion === 0 /* ES3 */) {
+                    case 154:
+                    case 156:
+                    case 157:
+                        if (languageVersion === 0) {
                             return 2;
                         }
-                        // If the method decorator signature only accepts a target and a key, we will only
-                        // type check those arguments.
                         return signature.parameters.length >= 3 ? 3 : 2;
-                    case 149 /* Parameter */:
-                        // A parameter declaration decorator will have three arguments (see
-                        // `ParameterDecorator` in core.d.ts)
+                    case 149:
                         return 3;
                     default:
                         return ts.Debug.fail();
@@ -45646,97 +37802,53 @@ var ts;
                 return args.length;
             }
         }
-        /**
-         * Returns the effective type of the first argument to a decorator.
-         * If 'node' is a class declaration or class expression, the effective argument type
-         *    is the type of the static side of the class.
-         * If 'node' is a parameter declaration, the effective argument type is either the type
-         *    of the static or instance side of the class for the parameter's parent method,
-         *    depending on whether the method is declared static.
-         *    For a constructor, the type is always the type of the static side of the class.
-         * If 'node' is a property, method, or accessor declaration, the effective argument
-         *    type is the type of the static or instance side of the parent class for class
-         *    element, depending on whether the element is declared static.
-         */
         function getEffectiveDecoratorFirstArgumentType(node) {
-            // The first argument to a decorator is its `target`.
-            if (node.kind === 235 /* ClassDeclaration */) {
-                // For a class decorator, the `target` is the type of the class (e.g. the
-                // "static" or "constructor" side of the class)
+            if (node.kind === 235) {
                 var classSymbol = getSymbolOfNode(node);
                 return getTypeOfSymbol(classSymbol);
             }
-            if (node.kind === 149 /* Parameter */) {
-                // For a parameter decorator, the `target` is the parent type of the
-                // parameter's containing method.
+            if (node.kind === 149) {
                 node = node.parent;
-                if (node.kind === 155 /* Constructor */) {
+                if (node.kind === 155) {
                     var classSymbol = getSymbolOfNode(node);
                     return getTypeOfSymbol(classSymbol);
                 }
             }
-            if (node.kind === 152 /* PropertyDeclaration */ ||
-                node.kind === 154 /* MethodDeclaration */ ||
-                node.kind === 156 /* GetAccessor */ ||
-                node.kind === 157 /* SetAccessor */) {
-                // For a property or method decorator, the `target` is the
-                // "static"-side type of the parent of the member if the member is
-                // declared "static"; otherwise, it is the "instance"-side type of the
-                // parent of the member.
+            if (node.kind === 152 ||
+                node.kind === 154 ||
+                node.kind === 156 ||
+                node.kind === 157) {
                 return getParentTypeOfClassElement(node);
             }
             ts.Debug.fail("Unsupported decorator target.");
             return errorType;
         }
-        /**
-         * Returns the effective type for the second argument to a decorator.
-         * If 'node' is a parameter, its effective argument type is one of the following:
-         *    If 'node.parent' is a constructor, the effective argument type is 'any', as we
-         *       will emit `undefined`.
-         *    If 'node.parent' is a member with an identifier, numeric, or string literal name,
-         *       the effective argument type will be a string literal type for the member name.
-         *    If 'node.parent' is a computed property name, the effective argument type will
-         *       either be a symbol type or the string type.
-         * If 'node' is a member with an identifier, numeric, or string literal name, the
-         *    effective argument type will be a string literal type for the member name.
-         * If 'node' is a computed property name, the effective argument type will either
-         *    be a symbol type or the string type.
-         * A class decorator does not have a second argument type.
-         */
         function getEffectiveDecoratorSecondArgumentType(node) {
-            // The second argument to a decorator is its `propertyKey`
-            if (node.kind === 235 /* ClassDeclaration */) {
+            if (node.kind === 235) {
                 ts.Debug.fail("Class decorators should not have a second synthetic argument.");
                 return errorType;
             }
-            if (node.kind === 149 /* Parameter */) {
+            if (node.kind === 149) {
                 node = node.parent;
-                if (node.kind === 155 /* Constructor */) {
-                    // For a constructor parameter decorator, the `propertyKey` will be `undefined`.
+                if (node.kind === 155) {
                     return anyType;
                 }
-                // For a non-constructor parameter decorator, the `propertyKey` will be either
-                // a string or a symbol, based on the name of the parameter's containing method.
-            }
-            if (node.kind === 152 /* PropertyDeclaration */ ||
-                node.kind === 154 /* MethodDeclaration */ ||
-                node.kind === 156 /* GetAccessor */ ||
-                node.kind === 157 /* SetAccessor */) {
-                // The `propertyKey` for a property or method decorator will be a
-                // string literal type if the member name is an identifier, number, or string;
-                // otherwise, if the member name is a computed property name it will
-                // be either string or symbol.
+            }
+            if (node.kind === 152 ||
+                node.kind === 154 ||
+                node.kind === 156 ||
+                node.kind === 157) {
                 var element = node;
                 var name = element.name;
                 switch (name.kind) {
-                    case 71 /* Identifier */:
+                    case 71:
                         return getLiteralType(ts.idText(name));
-                    case 8 /* NumericLiteral */:
-                    case 9 /* StringLiteral */:
+                    case 8:
+                    case 9:
                         return getLiteralType(name.text);
-                    case 147 /* ComputedPropertyName */:
+                    case 147:
                         var nameType = checkComputedPropertyName(name);
-                        if (isTypeAssignableToKind(nameType, 3072 /* ESSymbolLike */)) {
+                        if (isTypeAssignableToKind(nameType, 3072)) {
                             return nameType;
                         }
                         else {
@@ -45750,42 +37862,27 @@ var ts;
             ts.Debug.fail("Unsupported decorator target.");
             return errorType;
         }
-        /**
-         * Returns the effective argument type for the third argument to a decorator.
-         * If 'node' is a parameter, the effective argument type is the number type.
-         * If 'node' is a method or accessor, the effective argument type is a
-         *    `TypedPropertyDescriptor<T>` instantiated with the type of the member.
-         * Class and property decorators do not have a third effective argument.
-         */
         function getEffectiveDecoratorThirdArgumentType(node) {
-            // The third argument to a decorator is either its `descriptor` for a method decorator
-            // or its `parameterIndex` for a parameter decorator
-            if (node.kind === 235 /* ClassDeclaration */) {
+            if (node.kind === 235) {
                 ts.Debug.fail("Class decorators should not have a third synthetic argument.");
                 return errorType;
             }
-            if (node.kind === 149 /* Parameter */) {
-                // The `parameterIndex` for a parameter decorator is always a number
+            if (node.kind === 149) {
                 return numberType;
             }
-            if (node.kind === 152 /* PropertyDeclaration */) {
+            if (node.kind === 152) {
                 ts.Debug.fail("Property decorators should not have a third synthetic argument.");
                 return errorType;
             }
-            if (node.kind === 154 /* MethodDeclaration */ ||
-                node.kind === 156 /* GetAccessor */ ||
-                node.kind === 157 /* SetAccessor */) {
-                // The `descriptor` for a method decorator will be a `TypedPropertyDescriptor<T>`
-                // for the type of the member.
-                var propertyType = getTypeOfNode(node); // TODO: GH#18217
+            if (node.kind === 154 ||
+                node.kind === 156 ||
+                node.kind === 157) {
+                var propertyType = getTypeOfNode(node);
                 return createTypedPropertyDescriptorType(propertyType);
             }
             ts.Debug.fail("Unsupported decorator target.");
             return errorType;
         }
-        /**
-         * Returns the effective argument type for the provided argument to a decorator.
-         */
         function getEffectiveDecoratorArgumentType(node, argIndex) {
             if (argIndex === 0) {
                 return getEffectiveDecoratorFirstArgumentType(node.parent);
@@ -45799,44 +37896,27 @@ var ts;
             ts.Debug.fail("Decorators should not have a fourth synthetic argument.");
             return errorType;
         }
-        /**
-         * Gets the effective argument type for an argument in a call expression.
-         */
         function getEffectiveArgumentType(node, argIndex) {
-            // Decorators provide special arguments, a tagged template expression provides
-            // a special first argument, and string literals get string literal types
-            // unless we're reporting errors
-            if (node.kind === 150 /* Decorator */) {
+            if (node.kind === 150) {
                 return getEffectiveDecoratorArgumentType(node, argIndex);
             }
-            else if (argIndex === 0 && node.kind === 189 /* TaggedTemplateExpression */) {
+            else if (argIndex === 0 && node.kind === 189) {
                 return getGlobalTemplateStringsArrayType();
             }
-            // This is not a synthetic argument, so we return 'undefined'
-            // to signal that the caller needs to check the argument.
             return undefined;
         }
-        /**
-         * Gets the effective argument expression for an argument in a call expression.
-         */
         function getEffectiveArgument(node, args, argIndex) {
-            // For a decorator or the first argument of a tagged template expression we return undefined.
-            if (node.kind === 150 /* Decorator */ ||
-                (argIndex === 0 && node.kind === 189 /* TaggedTemplateExpression */)) {
+            if (node.kind === 150 ||
+                (argIndex === 0 && node.kind === 189)) {
                 return undefined;
             }
             return args[argIndex];
         }
-        /**
-         * Gets the error node to use when reporting errors for an effective argument.
-         */
         function getEffectiveArgumentErrorNode(node, argIndex, arg) {
-            if (node.kind === 150 /* Decorator */) {
-                // For a decorator, we use the expression of the decorator for error reporting.
+            if (node.kind === 150) {
                 return node.expression;
             }
-            else if (argIndex === 0 && node.kind === 189 /* TaggedTemplateExpression */) {
-                // For a the first argument of a tagged template expression, we use the template of the tag for error reporting.
+            else if (argIndex === 0 && node.kind === 189) {
                 return node.template;
             }
             else {
@@ -45855,45 +37935,27 @@ var ts;
             return ts.createDiagnosticForNodeArray(ts.getSourceFileOfNode(node), typeArguments, ts.Diagnostics.Expected_0_type_arguments_but_got_1, paramCount, typeArguments.length);
         }
         function resolveCall(node, signatures, candidatesOutArray, fallbackError) {
-            var isTaggedTemplate = node.kind === 189 /* TaggedTemplateExpression */;
-            var isDecorator = node.kind === 150 /* Decorator */;
+            var isTaggedTemplate = node.kind === 189;
+            var isDecorator = node.kind === 150;
             var isJsxOpeningOrSelfClosingElement = ts.isJsxOpeningLikeElement(node);
             var typeArguments;
             if (!isDecorator) {
                 typeArguments = node.typeArguments;
-                // We already perform checking on the type arguments on the class declaration itself.
-                if (isTaggedTemplate || isJsxOpeningOrSelfClosingElement || node.expression.kind !== 97 /* SuperKeyword */) {
+                if (isTaggedTemplate || isJsxOpeningOrSelfClosingElement || node.expression.kind !== 97) {
                     ts.forEach(typeArguments, checkSourceElement);
                 }
             }
             var candidates = candidatesOutArray || [];
-            // reorderCandidates fills up the candidates array directly
             reorderCandidates(signatures, candidates);
             if (!candidates.length) {
                 diagnostics.add(ts.createDiagnosticForNode(node, ts.Diagnostics.Call_target_does_not_contain_any_signatures));
                 return resolveErrorCall(node);
             }
             var args = getEffectiveCallArguments(node);
-            // The following applies to any value of 'excludeArgument[i]':
-            //    - true:      the argument at 'i' is susceptible to a one-time permanent contextual typing.
-            //    - undefined: the argument at 'i' is *not* susceptible to permanent contextual typing.
-            //    - false:     the argument at 'i' *was* and *has been* permanently contextually typed.
-            //
-            // The idea is that we will perform type argument inference & assignability checking once
-            // without using the susceptible parameters that are functions, and once more for each of those
-            // parameters, contextually typing each as we go along.
-            //
-            // For a tagged template, then the first argument be 'undefined' if necessary
-            // because it represents a TemplateStringsArray.
-            //
-            // For a decorator, no arguments are susceptible to contextual typing due to the fact
-            // decorators are applied to a declaration by the emitter, and not to an expression.
             var isSingleNonGenericCandidate = candidates.length === 1 && !candidates[0].typeParameters;
             var excludeArgument;
             var excludeCount = 0;
             if (!isDecorator && !isSingleNonGenericCandidate) {
-                // We do not need to call `getEffectiveArgumentCount` here as it only
-                // applies when calculating the number of arguments for a decorator.
                 for (var i = isTaggedTemplate ? 1 : 0; i < args.length; i++) {
                     if (isContextSensitive(args[i])) {
                         if (!excludeArgument) {
@@ -45904,43 +37966,10 @@ var ts;
                     }
                 }
             }
-            // The following variables are captured and modified by calls to chooseOverload.
-            // If overload resolution or type argument inference fails, we want to report the
-            // best error possible. The best error is one which says that an argument was not
-            // assignable to a parameter. This implies that everything else about the overload
-            // was fine. So if there is any overload that is only incorrect because of an
-            // argument, we will report an error on that one.
-            //
-            //     function foo(s: string): void;
-            //     function foo(n: number): void; // Report argument error on this overload
-            //     function foo(): void;
-            //     foo(true);
-            //
-            // If none of the overloads even made it that far, there are two possibilities.
-            // There was a problem with type arguments for some overload, in which case
-            // report an error on that. Or none of the overloads even had correct arity,
-            // in which case give an arity error.
-            //
-            //     function foo<T extends string>(x: T): void; // Report type argument error
-            //     function foo(): void;
-            //     foo<number>(0);
-            //
             var candidateForArgumentError;
             var candidateForTypeArgumentError;
             var result;
-            // If we are in signature help, a trailing comma indicates that we intend to provide another argument,
-            // so we will only accept overloads with arity at least 1 higher than the current number of provided arguments.
-            var signatureHelpTrailingComma = candidatesOutArray && node.kind === 187 /* CallExpression */ && node.arguments.hasTrailingComma;
-            // Section 4.12.1:
-            // if the candidate list contains one or more signatures for which the type of each argument
-            // expression is a subtype of each corresponding parameter type, the return type of the first
-            // of those signatures becomes the return type of the function call.
-            // Otherwise, the return type of the first signature in the candidate list becomes the return
-            // type of the function call.
-            //
-            // Whether the call is an error is determined by assignability of the arguments. The subtype pass
-            // is just important for choosing the best signature. So in the case where there is only one
-            // signature, the subtype pass is useless. So skipping it is an optimization.
+            var signatureHelpTrailingComma = candidatesOutArray && node.kind === 187 && node.arguments.hasTrailingComma;
             if (candidates.length > 1) {
                 result = chooseOverload(candidates, subtypeRelation, signatureHelpTrailingComma);
             }
@@ -45950,24 +37979,14 @@ var ts;
             if (result) {
                 return result;
             }
-            // No signatures were applicable. Now report errors based on the last applicable signature with
-            // no arguments excluded from assignability checks.
-            // If candidate is undefined, it means that no candidates had a suitable arity. In that case,
-            // skip the checkApplicableSignature check.
             if (candidateForArgumentError) {
                 if (isJsxOpeningOrSelfClosingElement) {
-                    // We do not report any error here because any error will be handled in "resolveCustomJsxElementAttributesType".
                     return candidateForArgumentError;
                 }
-                // excludeArgument is undefined, in this case also equivalent to [undefined, undefined, ...]
-                // The importance of excludeArgument is to prevent us from typing function expression parameters
-                // in arguments too early. If possible, we'd like to only type them once we know the correct
-                // overload. However, this matters for the case where the call is correct. When the call is
-                // an error, we don't need to exclude any arguments, although it would cause no harm to do so.
-                checkApplicableSignature(node, args, candidateForArgumentError, assignableRelation, /*excludeArgument*/ undefined, /*reportErrors*/ true);
+                checkApplicableSignature(node, args, candidateForArgumentError, assignableRelation, undefined, true);
             }
             else if (candidateForTypeArgumentError) {
-                checkTypeArguments(candidateForTypeArgumentError, node.typeArguments, /*reportErrors*/ true, fallbackError);
+                checkTypeArguments(candidateForTypeArgumentError, node.typeArguments, true, fallbackError);
             }
             else if (typeArguments && ts.every(signatures, function (sig) { return ts.length(sig.typeParameters) !== typeArguments.length; })) {
                 diagnostics.add(getTypeArgumentArityError(node, signatures, typeArguments));
@@ -45998,21 +38017,13 @@ var ts;
             else if (fallbackError) {
                 diagnostics.add(ts.createDiagnosticForNode(node, fallbackError));
             }
-            // No signature was applicable. We have already reported the errors for the invalid signature.
-            // If this is a type resolution session, e.g. Language Service, try to get better information than anySignature.
-            // Pick the longest signature. This way we can get a contextual type for cases like:
-            //     declare function f(a: { xa: number; xb: number; }, b: number);
-            //     f({ |
-            // Also, use explicitly-supplied type arguments if they are provided, so we can get a contextual signature in cases like:
-            //     declare function f<T>(k: keyof T);
-            //     f<Foo>("
             if (!produceDiagnostics) {
-                ts.Debug.assert(candidates.length > 0); // Else would have exited above.
+                ts.Debug.assert(candidates.length > 0);
                 var bestIndex = getLongestCandidateIndex(candidates, apparentArgumentCount === undefined ? args.length : apparentArgumentCount);
                 var candidate = candidates[bestIndex];
                 var typeParameters = candidate.typeParameters;
                 if (typeParameters && callLikeExpressionMayHaveTypeArguments(node) && node.typeArguments) {
-                    var typeArguments_1 = node.typeArguments.map(getTypeOfNode); // TODO: GH#18217
+                    var typeArguments_1 = node.typeArguments.map(getTypeOfNode);
                     while (typeArguments_1.length > typeParameters.length) {
                         typeArguments_1.pop();
                     }
@@ -46035,7 +38046,7 @@ var ts;
                     if (!hasCorrectArity(node, args, candidate, signatureHelpTrailingComma)) {
                         return undefined;
                     }
-                    if (!checkApplicableSignature(node, args, candidate, relation, excludeArgument, /*reportErrors*/ false)) {
+                    if (!checkApplicableSignature(node, args, candidate, relation, excludeArgument, false)) {
                         candidateForArgumentError = candidate;
                         return undefined;
                     }
@@ -46048,14 +38059,14 @@ var ts;
                     }
                     var candidate = void 0;
                     var inferenceContext = originalCandidate.typeParameters ?
-                        createInferenceContext(originalCandidate.typeParameters, originalCandidate, /*flags*/ ts.isInJavaScriptFile(node) ? 4 /* AnyDefault */ : 0 /* None */) :
+                        createInferenceContext(originalCandidate.typeParameters, originalCandidate, ts.isInJavaScriptFile(node) ? 4 : 0) :
                         undefined;
                     while (true) {
                         candidate = originalCandidate;
                         if (candidate.typeParameters) {
                             var typeArgumentTypes = void 0;
                             if (typeArguments) {
-                                var typeArgumentResult = checkTypeArguments(candidate, typeArguments, /*reportErrors*/ false);
+                                var typeArgumentResult = checkTypeArguments(candidate, typeArguments, false);
                                 if (typeArgumentResult) {
                                     typeArgumentTypes = typeArgumentResult;
                                 }
@@ -46070,7 +38081,7 @@ var ts;
                             var isJavascript = ts.isInJavaScriptFile(candidate.declaration);
                             candidate = getSignatureInstantiation(candidate, typeArgumentTypes, isJavascript);
                         }
-                        if (!checkApplicableSignature(node, args, candidate, relation, excludeArgument, /*reportErrors*/ false)) {
+                        if (!checkApplicableSignature(node, args, candidate, relation, excludeArgument, false)) {
                             candidateForArgumentError = candidate;
                             break;
                         }
@@ -46080,7 +38091,7 @@ var ts;
                         }
                         excludeCount--;
                         if (excludeCount > 0) {
-                            excludeArgument[excludeArgument.indexOf(/*value*/ true)] = false;
+                            excludeArgument[excludeArgument.indexOf(true)] = false;
                         }
                         else {
                             excludeArgument = undefined;
@@ -46106,15 +38117,13 @@ var ts;
             return maxParamsIndex;
         }
         function resolveCallExpression(node, candidatesOutArray) {
-            if (node.expression.kind === 97 /* SuperKeyword */) {
+            if (node.expression.kind === 97) {
                 var superType = checkSuperExpression(node.expression);
                 if (isTypeAny(superType)) {
-                    ts.forEach(node.arguments, checkExpresionNoReturn); // Still visit arguments so they get marked for visibility, etc
+                    ts.forEach(node.arguments, checkExpresionNoReturn);
                     return anySignature;
                 }
                 if (superType !== errorType) {
-                    // In super call, the candidate signatures are the matching arity signatures of the base constructor function instantiated
-                    // with the type arguments specified in the extends clause.
                     var baseTypeNode = ts.getClassExtendsHeritageClauseElement(ts.getContainingClass(node));
                     if (baseTypeNode) {
                         var baseConstructors = getInstantiatedConstructorsForTypeArguments(superType, baseTypeNode.typeArguments, baseTypeNode);
@@ -46129,52 +38138,33 @@ var ts;
             }
             var apparentType = getApparentType(funcType);
             if (apparentType === errorType) {
-                // Another error has already been reported
                 return resolveErrorCall(node);
             }
-            // Technically, this signatures list may be incomplete. We are taking the apparent type,
-            // but we are not including call signatures that may have been added to the Object or
-            // Function interface, since they have none by default. This is a bit of a leap of faith
-            // that the user will not add any.
-            var callSignatures = getSignaturesOfType(apparentType, 0 /* Call */);
-            var constructSignatures = getSignaturesOfType(apparentType, 1 /* Construct */);
-            // TS 1.0 Spec: 4.12
-            // In an untyped function call no TypeArgs are permitted, Args can be any argument list, no contextual
-            // types are provided for the argument expressions, and the result is always of type Any.
+            var callSignatures = getSignaturesOfType(apparentType, 0);
+            var constructSignatures = getSignaturesOfType(apparentType, 1);
             if (isUntypedFunctionCall(funcType, apparentType, callSignatures.length, constructSignatures.length)) {
-                // The unknownType indicates that an error already occurred (and was reported).  No
-                // need to report another error in this case.
                 if (funcType !== errorType && node.typeArguments) {
                     error(node, ts.Diagnostics.Untyped_function_calls_may_not_accept_type_arguments);
                 }
                 return resolveUntypedCall(node);
             }
-            // If FuncExpr's apparent type(section 3.8.1) is a function type, the call is a typed function call.
-            // TypeScript employs overload resolution in typed function calls in order to support functions
-            // with multiple call signatures.
             if (!callSignatures.length) {
                 if (constructSignatures.length) {
                     error(node, ts.Diagnostics.Value_of_type_0_is_not_callable_Did_you_mean_to_include_new, typeToString(funcType));
                 }
                 else {
-                    invocationError(node, apparentType, 0 /* Call */);
+                    invocationError(node, apparentType, 0);
                 }
                 return resolveErrorCall(node);
             }
             return resolveCall(node, callSignatures, candidatesOutArray);
         }
-        /**
-         * TS 1.0 spec: 4.12
-         * If FuncExpr is of type Any, or of an object type that has no call or construct signatures
-         * but is a subtype of the Function interface, the call is an untyped function call.
-         */
         function isUntypedFunctionCall(funcType, apparentFuncType, numCallSignatures, numConstructSignatures) {
-            // We exclude union types because we may have a union of function types that happen to have no common signatures.
-            return isTypeAny(funcType) || isTypeAny(apparentFuncType) && funcType.flags & 65536 /* TypeParameter */ ||
-                !numCallSignatures && !numConstructSignatures && !(apparentFuncType.flags & (262144 /* Union */ | 32768 /* Never */)) && isTypeAssignableTo(funcType, globalFunctionType);
+            return isTypeAny(funcType) || isTypeAny(apparentFuncType) && funcType.flags & 65536 ||
+                !numCallSignatures && !numConstructSignatures && !(apparentFuncType.flags & (262144 | 32768)) && isTypeAssignableTo(funcType, globalFunctionType);
         }
         function resolveNewExpression(node, candidatesOutArray) {
-            if (node.arguments && languageVersion < 1 /* ES5 */) {
+            if (node.arguments && languageVersion < 1) {
                 var spreadIndex = getSpreadArgumentIndex(node.arguments);
                 if (spreadIndex >= 0) {
                     error(node.arguments[spreadIndex], ts.Diagnostics.Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher);
@@ -46184,50 +38174,29 @@ var ts;
             if (expressionType === silentNeverType) {
                 return silentNeverSignature;
             }
-            // If expressionType's apparent type(section 3.8.1) is an object type with one or
-            // more construct signatures, the expression is processed in the same manner as a
-            // function call, but using the construct signatures as the initial set of candidate
-            // signatures for overload resolution. The result type of the function call becomes
-            // the result type of the operation.
             expressionType = getApparentType(expressionType);
             if (expressionType === errorType) {
-                // Another error has already been reported
                 return resolveErrorCall(node);
             }
-            // TS 1.0 spec: 4.11
-            // If expressionType is of type Any, Args can be any argument
-            // list and the result of the operation is of type Any.
             if (isTypeAny(expressionType)) {
                 if (node.typeArguments) {
                     error(node, ts.Diagnostics.Untyped_function_calls_may_not_accept_type_arguments);
                 }
                 return resolveUntypedCall(node);
             }
-            // Technically, this signatures list may be incomplete. We are taking the apparent type,
-            // but we are not including construct signatures that may have been added to the Object or
-            // Function interface, since they have none by default. This is a bit of a leap of faith
-            // that the user will not add any.
-            var constructSignatures = getSignaturesOfType(expressionType, 1 /* Construct */);
+            var constructSignatures = getSignaturesOfType(expressionType, 1);
             if (constructSignatures.length) {
                 if (!isConstructorAccessible(node, constructSignatures[0])) {
                     return resolveErrorCall(node);
                 }
-                // If the expression is a class of abstract type, then it cannot be instantiated.
-                // Note, only class declarations can be declared abstract.
-                // In the case of a merged class-module or class-interface declaration,
-                // only the class declaration node will have the Abstract flag set.
                 var valueDecl = expressionType.symbol && ts.getClassLikeDeclarationOfSymbol(expressionType.symbol);
-                if (valueDecl && ts.hasModifier(valueDecl, 128 /* Abstract */)) {
+                if (valueDecl && ts.hasModifier(valueDecl, 128)) {
                     error(node, ts.Diagnostics.Cannot_create_an_instance_of_an_abstract_class);
                     return resolveErrorCall(node);
                 }
                 return resolveCall(node, constructSignatures, candidatesOutArray);
             }
-            // If expressionType's apparent type is an object type with no construct signatures but
-            // one or more call signatures, the expression is processed as a function call. A compile-time
-            // error occurs if the result of the function call is not Void. The type of the result of the
-            // operation is Any. It is an error to have a Void this type.
-            var callSignatures = getSignaturesOfType(expressionType, 0 /* Call */);
+            var callSignatures = getSignaturesOfType(expressionType, 0);
             if (callSignatures.length) {
                 var signature = resolveCall(node, callSignatures, candidatesOutArray);
                 if (!isJavaScriptConstructor(signature.declaration) && getReturnTypeOfSignature(signature) !== voidType) {
@@ -46238,7 +38207,7 @@ var ts;
                 }
                 return signature;
             }
-            invocationError(node, expressionType, 1 /* Construct */);
+            invocationError(node, expressionType, 1);
             return resolveErrorCall(node);
         }
         function isConstructorAccessible(node, signature) {
@@ -46246,14 +38215,12 @@ var ts;
                 return true;
             }
             var declaration = signature.declaration;
-            var modifiers = ts.getSelectedModifierFlags(declaration, 24 /* NonPublicAccessibilityModifier */);
-            // Public constructor is accessible.
+            var modifiers = ts.getSelectedModifierFlags(declaration, 24);
             if (!modifiers) {
                 return true;
             }
             var declaringClassDeclaration = ts.getClassLikeDeclarationOfSymbol(declaration.parent.symbol);
             var declaringClass = getDeclaredTypeOfSymbol(declaration.parent.symbol);
-            // A private or protected constructor can only be instantiated within its own class (or a subclass, for protected)
             if (!isNodeWithinClass(node, declaringClassDeclaration)) {
                 var containingClass = ts.getContainingClass(node);
                 if (containingClass) {
@@ -46261,17 +38228,17 @@ var ts;
                     var baseTypes = getBaseTypes(containingType);
                     while (baseTypes.length) {
                         var baseType = baseTypes[0];
-                        if (modifiers & 16 /* Protected */ &&
+                        if (modifiers & 16 &&
                             baseType.symbol === declaration.parent.symbol) {
                             return true;
                         }
                         baseTypes = getBaseTypes(baseType);
                     }
                 }
-                if (modifiers & 8 /* Private */) {
+                if (modifiers & 8) {
                     error(node, ts.Diagnostics.Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration, typeToString(declaringClass));
                 }
-                if (modifiers & 16 /* Protected */) {
+                if (modifiers & 16) {
                     error(node, ts.Diagnostics.Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration, typeToString(declaringClass));
                 }
                 return false;
@@ -46279,7 +38246,7 @@ var ts;
             return true;
         }
         function invocationError(node, apparentType, kind) {
-            error(node, kind === 0 /* Call */
+            error(node, kind === 0
                 ? ts.Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures
                 : ts.Diagnostics.Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature, typeToString(apparentType));
             invocationErrorRecovery(apparentType, kind);
@@ -46289,8 +38256,6 @@ var ts;
                 return;
             }
             var importNode = getSymbolLinks(apparentType.symbol).originatingImport;
-            // Create a diagnostic on the originating import if possible onto which we can attach a quickfix
-            //  An import call expression cannot be rewritten into another form to correct the error - the only solution is to use `.default` at the use-site
             if (importNode && !ts.isImportCall(importNode)) {
                 var sigs = getSignaturesOfType(getTypeOfSymbol(getSymbolLinks(apparentType.symbol).target), kind);
                 if (!sigs || !sigs.length)
@@ -46302,94 +38267,72 @@ var ts;
             var tagType = checkExpression(node.tag);
             var apparentType = getApparentType(tagType);
             if (apparentType === errorType) {
-                // Another error has already been reported
                 return resolveErrorCall(node);
             }
-            var callSignatures = getSignaturesOfType(apparentType, 0 /* Call */);
-            var constructSignatures = getSignaturesOfType(apparentType, 1 /* Construct */);
+            var callSignatures = getSignaturesOfType(apparentType, 0);
+            var constructSignatures = getSignaturesOfType(apparentType, 1);
             if (isUntypedFunctionCall(tagType, apparentType, callSignatures.length, constructSignatures.length)) {
                 return resolveUntypedCall(node);
             }
             if (!callSignatures.length) {
-                invocationError(node, apparentType, 0 /* Call */);
+                invocationError(node, apparentType, 0);
                 return resolveErrorCall(node);
             }
             return resolveCall(node, callSignatures, candidatesOutArray);
         }
-        /**
-         * Gets the localized diagnostic head message to use for errors when resolving a decorator as a call expression.
-         */
         function getDiagnosticHeadMessageForDecoratorResolution(node) {
             switch (node.parent.kind) {
-                case 235 /* ClassDeclaration */:
-                case 205 /* ClassExpression */:
+                case 235:
+                case 205:
                     return ts.Diagnostics.Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression;
-                case 149 /* Parameter */:
+                case 149:
                     return ts.Diagnostics.Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression;
-                case 152 /* PropertyDeclaration */:
+                case 152:
                     return ts.Diagnostics.Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression;
-                case 154 /* MethodDeclaration */:
-                case 156 /* GetAccessor */:
-                case 157 /* SetAccessor */:
+                case 154:
+                case 156:
+                case 157:
                     return ts.Diagnostics.Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression;
                 default:
                     return ts.Debug.fail();
             }
         }
-        /**
-         * Resolves a decorator as if it were a call expression.
-         */
         function resolveDecorator(node, candidatesOutArray) {
             var funcType = checkExpression(node.expression);
             var apparentType = getApparentType(funcType);
             if (apparentType === errorType) {
                 return resolveErrorCall(node);
             }
-            var callSignatures = getSignaturesOfType(apparentType, 0 /* Call */);
-            var constructSignatures = getSignaturesOfType(apparentType, 1 /* Construct */);
+            var callSignatures = getSignaturesOfType(apparentType, 0);
+            var constructSignatures = getSignaturesOfType(apparentType, 1);
             if (isUntypedFunctionCall(funcType, apparentType, callSignatures.length, constructSignatures.length)) {
                 return resolveUntypedCall(node);
             }
             if (isPotentiallyUncalledDecorator(node, callSignatures)) {
-                var nodeStr = ts.getTextOfNode(node.expression, /*includeTrivia*/ false);
+                var nodeStr = ts.getTextOfNode(node.expression, false);
                 error(node, ts.Diagnostics._0_accepts_too_few_arguments_to_be_used_as_a_decorator_here_Did_you_mean_to_call_it_first_and_write_0, nodeStr);
                 return resolveErrorCall(node);
             }
             var headMessage = getDiagnosticHeadMessageForDecoratorResolution(node);
             if (!callSignatures.length) {
-                var errorInfo = ts.chainDiagnosticMessages(/*details*/ undefined, ts.Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures, typeToString(apparentType));
+                var errorInfo = ts.chainDiagnosticMessages(undefined, ts.Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures, typeToString(apparentType));
                 errorInfo = ts.chainDiagnosticMessages(errorInfo, headMessage);
                 diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(node, errorInfo));
-                invocationErrorRecovery(apparentType, 0 /* Call */);
+                invocationErrorRecovery(apparentType, 0);
                 return resolveErrorCall(node);
             }
             return resolveCall(node, callSignatures, candidatesOutArray, headMessage);
         }
-        /**
-         * Sometimes, we have a decorator that could accept zero arguments,
-         * but is receiving too many arguments as part of the decorator invocation.
-         * In those cases, a user may have meant to *call* the expression before using it as a decorator.
-         */
         function isPotentiallyUncalledDecorator(decorator, signatures) {
             return signatures.length && ts.every(signatures, function (signature) {
                 return signature.minArgumentCount === 0 &&
                     !signature.hasRestParameter &&
-                    signature.parameters.length < getEffectiveArgumentCount(decorator, /*args*/ undefined, signature);
+                    signature.parameters.length < getEffectiveArgumentCount(decorator, undefined, signature);
             });
         }
-        /**
-         * This function is similar to getResolvedSignature but is exclusively for trying to resolve JSX stateless-function component.
-         * The main reason we have to use this function instead of getResolvedSignature because, the caller of this function will already check the type of openingLikeElement's tagName
-         * and pass the type as elementType. The elementType can not be a union (as such case should be handled by the caller of this function)
-         * Note: at this point, we are still not sure whether the opening-like element is a stateless function component or not.
-         * @param openingLikeElement an opening-like JSX element to try to resolve as JSX stateless function
-         * @param elementType an element type of the opneing-like element by checking opening-like element's tagname.
-         * @param candidatesOutArray an array of signature to be filled in by the function. It is passed by signature help in the language service;
-         *                           the function will fill it up with appropriate candidate signatures
-         */
         function getResolvedJsxStatelessFunctionSignature(openingLikeElement, elementType, candidatesOutArray) {
-            ts.Debug.assert(!(elementType.flags & 262144 /* Union */));
-            var callSignatures = elementType && getSignaturesOfType(elementType, 0 /* Call */);
+            ts.Debug.assert(!(elementType.flags & 262144));
+            var callSignatures = elementType && getSignaturesOfType(elementType, 0);
             if (callSignatures && callSignatures.length > 0) {
                 return resolveCall(openingLikeElement, callSignatures, candidatesOutArray);
             }
@@ -46397,17 +38340,16 @@ var ts;
         }
         function resolveSignature(node, candidatesOutArray) {
             switch (node.kind) {
-                case 187 /* CallExpression */:
+                case 187:
                     return resolveCallExpression(node, candidatesOutArray);
-                case 188 /* NewExpression */:
+                case 188:
                     return resolveNewExpression(node, candidatesOutArray);
-                case 189 /* TaggedTemplateExpression */:
+                case 189:
                     return resolveTaggedTemplateExpression(node, candidatesOutArray);
-                case 150 /* Decorator */:
+                case 150:
                     return resolveDecorator(node, candidatesOutArray);
-                case 257 /* JsxOpeningElement */:
-                case 256 /* JsxSelfClosingElement */:
-                    // This code-path is called by language service
+                case 257:
+                case 256:
                     var exprTypes = checkExpression(node.tagName);
                     return forEachType(exprTypes, function (exprType) {
                         var sfcResult = getResolvedJsxStatelessFunctionSignature(node, exprType, candidatesOutArray);
@@ -46423,41 +38365,21 @@ var ts;
             }
             throw ts.Debug.assertNever(node, "Branch in 'resolveSignature' should be unreachable.");
         }
-        /**
-         * Resolve a signature of a given call-like expression.
-         * @param node a call-like expression to try resolve a signature for
-         * @param candidatesOutArray an array of signature to be filled in by the function. It is passed by signature help in the language service;
-         *                           the function will fill it up with appropriate candidate signatures
-         * @return a signature of the call-like expression or undefined if one can't be found
-         */
         function getResolvedSignature(node, candidatesOutArray) {
             var links = getNodeLinks(node);
-            // If getResolvedSignature has already been called, we will have cached the resolvedSignature.
-            // However, it is possible that either candidatesOutArray was not passed in the first time,
-            // or that a different candidatesOutArray was passed in. Therefore, we need to redo the work
-            // to correctly fill the candidatesOutArray.
             var cached = links.resolvedSignature;
             if (cached && cached !== resolvingSignature && !candidatesOutArray) {
                 return cached;
             }
             links.resolvedSignature = resolvingSignature;
             var result = resolveSignature(node, candidatesOutArray);
-            // If signature resolution originated in control flow type analysis (for example to compute the
-            // assigned type in a flow assignment) we don't cache the result as it may be based on temporary
-            // types from the control flow analysis.
             links.resolvedSignature = flowLoopStart === flowLoopCount ? result : cached;
             return result;
         }
-        /**
-         * Indicates whether a declaration can be treated as a constructor in a JavaScript
-         * file.
-         */
         function isJavaScriptConstructor(node) {
             if (node && ts.isInJavaScriptFile(node)) {
-                // If the node has a @class tag, treat it like a constructor.
                 if (ts.getJSDocClassTag(node))
                     return true;
-                // If the symbol of the node has members, treat it like a constructor.
                 var symbol = ts.isFunctionDeclaration(node) || ts.isFunctionExpression(node) ? getSymbolOfNode(node) :
                     ts.isVariableDeclaration(node) && node.initializer && ts.isFunctionExpression(node.initializer) ? getSymbolOfNode(node.initializer) :
                         undefined;
@@ -46496,10 +38418,10 @@ var ts;
                 return false;
             }
             var parent = node.parent;
-            while (parent && parent.kind === 185 /* PropertyAccessExpression */) {
+            while (parent && parent.kind === 185) {
                 parent = parent.parent;
             }
-            if (parent && ts.isBinaryExpression(parent) && ts.isPrototypeAccess(parent.left) && parent.operatorToken.kind === 58 /* EqualsToken */) {
+            if (parent && ts.isBinaryExpression(parent) && ts.isPrototypeAccess(parent.left) && parent.operatorToken.kind === 58) {
                 var right = ts.getInitializerOfBinaryExpression(parent);
                 return ts.isObjectLiteralExpression(right) && right;
             }
@@ -46507,41 +38429,31 @@ var ts;
         function getInferredClassType(symbol) {
             var links = getSymbolLinks(symbol);
             if (!links.inferredClassType) {
-                links.inferredClassType = createAnonymousType(symbol, getMembersOfSymbol(symbol) || emptySymbols, ts.emptyArray, ts.emptyArray, /*stringIndexType*/ undefined, /*numberIndexType*/ undefined);
+                links.inferredClassType = createAnonymousType(symbol, getMembersOfSymbol(symbol) || emptySymbols, ts.emptyArray, ts.emptyArray, undefined, undefined);
             }
             return links.inferredClassType;
         }
         function isInferredClassType(type) {
             return type.symbol
-                && ts.getObjectFlags(type) & 16 /* Anonymous */
+                && ts.getObjectFlags(type) & 16
                 && getSymbolLinks(type.symbol).inferredClassType === type;
         }
-        /**
-         * Syntactically and semantically checks a call or new expression.
-         * @param node The call/new expression to be checked.
-         * @returns On success, the expression's signature's return type. On failure, anyType.
-         */
         function checkCallExpression(node) {
             if (!checkGrammarTypeArguments(node, node.typeArguments))
                 checkGrammarArguments(node.arguments);
             var signature = getResolvedSignature(node);
-            if (node.expression.kind === 97 /* SuperKeyword */) {
+            if (node.expression.kind === 97) {
                 return voidType;
             }
-            if (node.kind === 188 /* NewExpression */) {
+            if (node.kind === 188) {
                 var declaration = signature.declaration;
                 if (declaration &&
-                    declaration.kind !== 155 /* Constructor */ &&
-                    declaration.kind !== 159 /* ConstructSignature */ &&
-                    declaration.kind !== 164 /* ConstructorType */ &&
+                    declaration.kind !== 155 &&
+                    declaration.kind !== 159 &&
+                    declaration.kind !== 164 &&
                     !ts.isJSDocConstructSignature(declaration)) {
-                    // When resolved signature is a call signature (and not a construct signature) the result type is any, unless
-                    // the declaring function had members created through 'x.prototype.y = expr' or 'this.y = expr' psuedodeclarations
-                    // in a JS file
-                    // Note:JS inferred classes might come from a variable declaration instead of a function declaration.
-                    // In this case, using getResolvedSymbol directly is required to avoid losing the members from the declaration.
                     var funcSymbol = checkExpression(node.expression).symbol;
-                    if (!funcSymbol && node.expression.kind === 71 /* Identifier */) {
+                    if (!funcSymbol && node.expression.kind === 71) {
                         funcSymbol = getResolvedSymbol(node.expression);
                     }
                     var type = funcSymbol && getJavaScriptClassType(funcSymbol);
@@ -46554,14 +38466,11 @@ var ts;
                     return anyType;
                 }
             }
-            // In JavaScript files, calls to any identifier 'require' are treated as external module imports
             if (ts.isInJavaScriptFile(node) && isCommonJsRequire(node)) {
                 return resolveExternalModuleTypeByLiteral(node.arguments[0]);
             }
             var returnType = getReturnTypeOfSignature(signature);
-            // Treat any call to the global 'Symbol' function that is part of a const variable or readonly property
-            // as a fresh unique symbol literal type.
-            if (returnType.flags & 3072 /* ESSymbolLike */ && isSymbolOrSymbolForCall(node)) {
+            if (returnType.flags & 3072 && isSymbolOrSymbolForCall(node)) {
                 return getESSymbolLikeTypeForNode(ts.walkUpParenthesizedExpressions(node.parent));
             }
             var jsAssignmentType;
@@ -46586,15 +38495,13 @@ var ts;
             if (!ts.isIdentifier(left) || left.escapedText !== "Symbol") {
                 return false;
             }
-            // make sure `Symbol` is the global symbol
-            var globalESSymbol = getGlobalESSymbolConstructorSymbol(/*reportErrors*/ false);
+            var globalESSymbol = getGlobalESSymbolConstructorSymbol(false);
             if (!globalESSymbol) {
                 return false;
             }
-            return globalESSymbol === resolveName(left, "Symbol", 67216319 /* Value */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined, /*isUse*/ false);
+            return globalESSymbol === resolveName(left, "Symbol", 67216319, undefined, undefined, false);
         }
         function checkImportCallExpression(node) {
-            // Check grammar of dynamic import
             if (!checkGrammarArguments(node.arguments))
                 checkGrammarImportCallExpression(node);
             if (node.arguments.length === 0) {
@@ -46602,17 +38509,15 @@ var ts;
             }
             var specifier = node.arguments[0];
             var specifierType = checkExpressionCached(specifier);
-            // Even though multiple arugments is grammatically incorrect, type-check extra arguments for completion
             for (var i = 1; i < node.arguments.length; ++i) {
                 checkExpressionCached(node.arguments[i]);
             }
-            if (specifierType.flags & 8192 /* Undefined */ || specifierType.flags & 16384 /* Null */ || !isTypeAssignableTo(specifierType, stringType)) {
+            if (specifierType.flags & 8192 || specifierType.flags & 16384 || !isTypeAssignableTo(specifierType, stringType)) {
                 error(specifier, ts.Diagnostics.Dynamic_import_s_specifier_must_be_of_type_string_but_here_has_type_0, typeToString(specifierType));
             }
-            // resolveExternalModuleName will return undefined if the moduleReferenceExpression is not a string literal
             var moduleSymbol = resolveExternalModuleName(node, specifier);
             if (moduleSymbol) {
-                var esModuleSymbol = resolveESModuleSymbol(moduleSymbol, specifier, /*dontRecursivelyResolve*/ true);
+                var esModuleSymbol = resolveESModuleSymbol(moduleSymbol, specifier, true);
                 if (esModuleSymbol) {
                     return createPromiseReturnType(node, getTypeWithSyntheticDefaultImportType(getTypeOfSymbol(esModuleSymbol), esModuleSymbol, moduleSymbol));
                 }
@@ -46624,16 +38529,16 @@ var ts;
                 var synthType = type;
                 if (!synthType.syntheticType) {
                     var file = ts.find(originalSymbol.declarations, ts.isSourceFile);
-                    var hasSyntheticDefault = canHaveSyntheticDefault(file, originalSymbol, /*dontResolveAlias*/ false);
+                    var hasSyntheticDefault = canHaveSyntheticDefault(file, originalSymbol, false);
                     if (hasSyntheticDefault) {
                         var memberTable = ts.createSymbolTable();
-                        var newSymbol = createSymbol(2097152 /* Alias */, "default" /* Default */);
+                        var newSymbol = createSymbol(2097152, "default");
                         newSymbol.target = resolveSymbol(symbol);
-                        memberTable.set("default" /* Default */, newSymbol);
-                        var anonymousSymbol = createSymbol(2048 /* TypeLiteral */, "__type" /* Type */);
-                        var defaultContainingObject = createAnonymousType(anonymousSymbol, memberTable, ts.emptyArray, ts.emptyArray, /*stringIndexInfo*/ undefined, /*numberIndexInfo*/ undefined);
+                        memberTable.set("default", newSymbol);
+                        var anonymousSymbol = createSymbol(2048, "__type");
+                        var defaultContainingObject = createAnonymousType(anonymousSymbol, memberTable, ts.emptyArray, ts.emptyArray, undefined, undefined);
                         anonymousSymbol.type = defaultContainingObject;
-                        synthType.syntheticType = isValidSpreadType(type) ? getSpreadType(type, defaultContainingObject, anonymousSymbol, /*typeFLags*/ 0, /*objectFlags*/ 0) : defaultContainingObject;
+                        synthType.syntheticType = isValidSpreadType(type) ? getSpreadType(type, defaultContainingObject, anonymousSymbol, 0, 0) : defaultContainingObject;
                     }
                     else {
                         synthType.syntheticType = type;
@@ -46644,36 +38549,33 @@ var ts;
             return type;
         }
         function isCommonJsRequire(node) {
-            if (!ts.isRequireCall(node, /*checkArgumentIsStringLiteralLike*/ true)) {
+            if (!ts.isRequireCall(node, true)) {
                 return false;
             }
-            // Make sure require is not a local function
             if (!ts.isIdentifier(node.expression))
                 return ts.Debug.fail();
-            var resolvedRequire = resolveName(node.expression, node.expression.escapedText, 67216319 /* Value */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined, /*isUse*/ true); // TODO: GH#18217
+            var resolvedRequire = resolveName(node.expression, node.expression.escapedText, 67216319, undefined, undefined, true);
             if (resolvedRequire === requireSymbol) {
                 return true;
             }
-            // project includes symbol named 'require' - make sure that it is ambient and local non-alias
-            if (resolvedRequire.flags & 2097152 /* Alias */) {
+            if (resolvedRequire.flags & 2097152) {
                 return false;
             }
-            var targetDeclarationKind = resolvedRequire.flags & 16 /* Function */
-                ? 234 /* FunctionDeclaration */
-                : resolvedRequire.flags & 3 /* Variable */
-                    ? 232 /* VariableDeclaration */
-                    : 0 /* Unknown */;
-            if (targetDeclarationKind !== 0 /* Unknown */) {
+            var targetDeclarationKind = resolvedRequire.flags & 16
+                ? 234
+                : resolvedRequire.flags & 3
+                    ? 232
+                    : 0;
+            if (targetDeclarationKind !== 0) {
                 var decl = ts.getDeclarationOfKind(resolvedRequire, targetDeclarationKind);
-                // function/variable declaration should be ambient
-                return !!decl && !!(decl.flags & 4194304 /* Ambient */);
+                return !!decl && !!(decl.flags & 4194304);
             }
             return false;
         }
         function checkTaggedTemplateExpression(node) {
             checkGrammarTypeArguments(node, node.typeArguments);
-            if (languageVersion < 2 /* ES2015 */) {
-                checkExternalEmitHelpers(node, 65536 /* MakeTemplateObject */);
+            if (languageVersion < 2) {
+                checkExternalEmitHelpers(node, 65536);
             }
             return getReturnTypeOfSignature(getResolvedSignature(node));
         }
@@ -46697,10 +38599,10 @@ var ts;
         }
         function checkMetaProperty(node) {
             checkGrammarMetaProperty(node);
-            if (node.keywordToken === 94 /* NewKeyword */) {
+            if (node.keywordToken === 94) {
                 return checkNewTargetMetaProperty(node);
             }
-            if (node.keywordToken === 91 /* ImportKeyword */) {
+            if (node.keywordToken === 91) {
                 return checkImportMetaProperty(node);
             }
             return ts.Debug.assertNever(node.keywordToken);
@@ -46711,7 +38613,7 @@ var ts;
                 error(node, ts.Diagnostics.Meta_property_0_is_only_allowed_in_the_body_of_a_function_declaration_function_expression_or_constructor, "new.target");
                 return errorType;
             }
-            else if (container.kind === 155 /* Constructor */) {
+            else if (container.kind === 155) {
                 var symbol = getSymbolOfNode(container.parent);
                 return getTypeOfSymbol(symbol);
             }
@@ -46721,11 +38623,11 @@ var ts;
             }
         }
         function checkImportMetaProperty(node) {
-            if (languageVersion < 6 /* ESNext */ || moduleKind < ts.ModuleKind.ESNext) {
+            if (languageVersion < 6 || moduleKind < ts.ModuleKind.ESNext) {
                 error(node, ts.Diagnostics.The_import_meta_meta_property_is_only_allowed_using_ESNext_for_the_target_and_module_compiler_options);
             }
             var file = ts.getSourceFileOfNode(node);
-            ts.Debug.assert(!!(file.flags & 1048576 /* PossiblyContainsImportMeta */), "Containing file is missing import meta node flag.");
+            ts.Debug.assert(!!(file.flags & 1048576), "Containing file is missing import meta node flag.");
             ts.Debug.assert(!!file.externalModuleIndicator, "Containing file should be a module.");
             return node.name.escapedText === "meta" ? getGlobalImportMetaType() : errorType;
         }
@@ -46768,7 +38670,7 @@ var ts;
                 var parameter = signature.thisParameter;
                 if (!parameter || parameter.valueDeclaration && !parameter.valueDeclaration.type) {
                     if (!parameter) {
-                        signature.thisParameter = createSymbolWithType(context.thisParameter, /*type*/ undefined);
+                        signature.thisParameter = createSymbolWithType(context.thisParameter, undefined);
                     }
                     assignTypeToParameterAndFixTypeParameters(signature.thisParameter, getTypeOfSymbol(context.thisParameter));
                 }
@@ -46782,7 +38684,6 @@ var ts;
                 }
             }
             if (signature.hasRestParameter && isRestParameterIndex(context, signature.parameters.length - 1)) {
-                // parameter might be a transient symbol generated by use of `arguments` in the function body.
                 var parameter = ts.last(signature.parameters);
                 if (isTransientSymbol(parameter) || !ts.getEffectiveTypeAnnotationNode(parameter.valueDeclaration)) {
                     var contextualParameterType = getTypeOfSymbol(ts.last(context.parameters));
@@ -46790,13 +38691,11 @@ var ts;
                 }
             }
         }
-        // When contextual typing assigns a type to a parameter that contains a binding pattern, we also need to push
-        // the destructured type into the contained binding elements.
         function assignBindingElementTypes(pattern) {
             for (var _i = 0, _a = pattern.elements; _i < _a.length; _i++) {
                 var element = _a[_i];
                 if (!ts.isOmittedExpression(element)) {
-                    if (element.name.kind === 71 /* Identifier */) {
+                    if (element.name.kind === 71) {
                         getSymbolLinks(getSymbolOfNode(element)).type = getTypeForBindingElement(element);
                     }
                     else {
@@ -46810,8 +38709,7 @@ var ts;
             if (!links.type) {
                 links.type = contextualType;
                 var decl = parameter.valueDeclaration;
-                if (decl.name.kind !== 71 /* Identifier */) {
-                    // if inference didn't come up with anything but {}, fall back to the binding pattern if present.
+                if (decl.name.kind !== 71) {
                     if (links.type === emptyObjectType) {
                         links.type = getTypeFromBindingPattern(decl.name);
                     }
@@ -46820,10 +38718,8 @@ var ts;
             }
         }
         function createPromiseType(promisedType) {
-            // creates a `Promise<T>` type where `T` is the promisedType argument
-            var globalPromiseType = getGlobalPromiseType(/*reportErrors*/ true);
+            var globalPromiseType = getGlobalPromiseType(true);
             if (globalPromiseType !== emptyGenericType) {
-                // if the promised type is itself a promise, get the underlying type; otherwise, fallback to the promised type
                 promisedType = getAwaitedType(promisedType) || emptyObjectType;
                 return createTypeReference(globalPromiseType, [promisedType]);
             }
@@ -46837,7 +38733,7 @@ var ts;
                     ts.Diagnostics.An_async_function_or_method_must_return_a_Promise_Make_sure_you_have_a_declaration_for_Promise_or_include_ES2015_in_your_lib_option);
                 return errorType;
             }
-            else if (!getGlobalPromiseConstructorSymbol(/*reportErrors*/ true)) {
+            else if (!getGlobalPromiseConstructorSymbol(true)) {
                 error(func, ts.isImportCall(func) ?
                     ts.Diagnostics.A_dynamic_import_call_in_ES5_SlashES3_requires_the_Promise_constructor_Make_sure_you_have_a_declaration_for_the_Promise_constructor_or_include_ES2015_in_your_lib_option :
                     ts.Diagnostics.An_async_function_or_method_in_ES5_SlashES3_requires_the_Promise_constructor_Make_sure_you_have_a_declaration_for_the_Promise_constructor_or_include_ES2015_in_your_lib_option);
@@ -46850,24 +38746,20 @@ var ts;
             }
             var functionFlags = ts.getFunctionFlags(func);
             var type;
-            if (func.body.kind !== 213 /* Block */) {
+            if (func.body.kind !== 213) {
                 type = checkExpressionCached(func.body, checkMode);
-                if (functionFlags & 2 /* Async */) {
-                    // From within an async function you can return either a non-promise value or a promise. Any
-                    // Promise/A+ compatible implementation will always assimilate any foreign promise, so the
-                    // return type of the body should be unwrapped to its awaited type, which we will wrap in
-                    // the native Promise<T> type later in this function.
-                    type = checkAwaitedType(type, /*errorNode*/ func, ts.Diagnostics.The_return_type_of_an_async_function_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member);
+                if (functionFlags & 2) {
+                    type = checkAwaitedType(type, func, ts.Diagnostics.The_return_type_of_an_async_function_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member);
                 }
             }
             else {
                 var types = checkAndAggregateReturnExpressionTypes(func, checkMode);
-                if (functionFlags & 1 /* Generator */) { // Generator or AsyncGenerator function
+                if (functionFlags & 1) {
                     types = ts.concatenate(checkAndAggregateYieldOperandTypes(func, checkMode), types);
                     if (!types || types.length === 0) {
-                        var iterableIteratorAny = functionFlags & 2 /* Async */
-                            ? createAsyncIterableIteratorType(anyType) // AsyncGenerator function
-                            : createIterableIteratorType(anyType); // Generator function
+                        var iterableIteratorAny = functionFlags & 2
+                            ? createAsyncIterableIteratorType(anyType)
+                            : createIterableIteratorType(anyType);
                         if (noImplicitAny) {
                             error(func.asteriskToken, ts.Diagnostics.Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_type, typeToString(iterableIteratorAny));
                         }
@@ -46876,20 +38768,17 @@ var ts;
                 }
                 else {
                     if (!types) {
-                        // For an async function, the return type will not be never, but rather a Promise for never.
-                        return functionFlags & 2 /* Async */
-                            ? createPromiseReturnType(func, neverType) // Async function
-                            : neverType; // Normal function
+                        return functionFlags & 2
+                            ? createPromiseReturnType(func, neverType)
+                            : neverType;
                     }
                     if (types.length === 0) {
-                        // For an async function, the return type will not be void, but rather a Promise for void.
-                        return functionFlags & 2 /* Async */
-                            ? createPromiseReturnType(func, voidType) // Async function
-                            : voidType; // Normal function
+                        return functionFlags & 2
+                            ? createPromiseReturnType(func, voidType)
+                            : voidType;
                     }
                 }
-                // Return a union of the return expression types.
-                type = getUnionType(types, 2 /* Subtype */);
+                type = getUnionType(types, 2);
             }
             var contextualSignature = getContextualSignatureForFunctionLikeDeclaration(func);
             if (!contextualSignature) {
@@ -46900,14 +38789,14 @@ var ts;
                     contextualSignature === getSignatureFromDeclaration(func) ? type :
                         getReturnTypeOfSignature(contextualSignature);
                 if (contextualType) {
-                    switch (functionFlags & 3 /* AsyncGenerator */) {
-                        case 3 /* AsyncGenerator */:
-                            contextualType = getIteratedTypeOfGenerator(contextualType, /*isAsyncGenerator*/ true);
+                    switch (functionFlags & 3) {
+                        case 3:
+                            contextualType = getIteratedTypeOfGenerator(contextualType, true);
                             break;
-                        case 1 /* Generator */:
-                            contextualType = getIteratedTypeOfGenerator(contextualType, /*isAsyncGenerator*/ false);
+                        case 1:
+                            contextualType = getIteratedTypeOfGenerator(contextualType, false);
                             break;
-                        case 2 /* Async */:
+                        case 2:
                             contextualType = getPromisedTypeOfPromise(contextualType);
                             break;
                     }
@@ -46915,15 +38804,12 @@ var ts;
                 type = getWidenedLiteralLikeTypeForContextualType(type, contextualType);
             }
             var widenedType = getWidenedType(type);
-            switch (functionFlags & 3 /* AsyncGenerator */) {
-                case 3 /* AsyncGenerator */:
+            switch (functionFlags & 3) {
+                case 3:
                     return createAsyncIterableIteratorType(widenedType);
-                case 1 /* Generator */:
+                case 1:
                     return createIterableIteratorType(widenedType);
-                case 2 /* Async */:
-                    // From within an async function you can return either a non-promise value or a promise. Any
-                    // Promise/A+ compatible implementation will always assimilate any foreign promise, so the
-                    // return type of the body is awaited type of the body, wrapped in a native Promise<T> type.
+                case 2:
                     return createPromiseType(widenedType);
                 default:
                     return widenedType;
@@ -46931,7 +38817,7 @@ var ts;
         }
         function checkAndAggregateYieldOperandTypes(func, checkMode) {
             var aggregatedTypes = [];
-            var isAsync = (ts.getFunctionFlags(func) & 2 /* Async */) !== 0;
+            var isAsync = (ts.getFunctionFlags(func) & 2) !== 0;
             ts.forEachYieldExpression(func.body, function (yieldExpression) {
                 ts.pushIfUnique(aggregatedTypes, getYieldedTypeOfYieldExpression(yieldExpression, isAsync, checkMode));
             });
@@ -46940,8 +38826,7 @@ var ts;
         function getYieldedTypeOfYieldExpression(node, isAsync, checkMode) {
             var errorNode = node.expression || node;
             var expressionType = node.expression ? checkExpressionCached(node.expression, checkMode) : undefinedWideningType;
-            // A `yield*` expression effectively yields everything that its operand yields
-            var yieldedType = node.asteriskToken ? checkIteratedTypeOrElementType(expressionType, errorNode, /*allowStringInput*/ false, isAsync) : expressionType;
+            var yieldedType = node.asteriskToken ? checkIteratedTypeOrElementType(expressionType, errorNode, false, isAsync) : expressionType;
             return !isAsync ? yieldedType : getAwaitedType(yieldedType, errorNode, node.asteriskToken
                 ? ts.Diagnostics.Type_of_iterated_elements_of_a_yield_Asterisk_operand_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member
                 : ts.Diagnostics.Type_of_yield_operand_in_an_async_generator_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member);
@@ -46961,15 +38846,14 @@ var ts;
             return eachTypeContainedIn(mapType(type, getRegularTypeOfLiteralType), switchTypes);
         }
         function functionHasImplicitReturn(func) {
-            if (!(func.flags & 128 /* HasImplicitReturn */)) {
+            if (!(func.flags & 128)) {
                 return false;
             }
-            if (ts.some(func.body.statements, function (statement) { return statement.kind === 227 /* SwitchStatement */ && isExhaustiveSwitchStatement(statement); })) {
+            if (ts.some(func.body.statements, function (statement) { return statement.kind === 227 && isExhaustiveSwitchStatement(statement); })) {
                 return false;
             }
             return true;
         }
-        /** NOTE: Return value of `[]` means a different thing than `undefined`. `[]` means func returns `void`, `undefined` means it returns `never`. */
         function checkAndAggregateReturnExpressionTypes(func, checkMode) {
             var functionFlags = ts.getFunctionFlags(func);
             var aggregatedTypes = [];
@@ -46979,14 +38863,10 @@ var ts;
                 var expr = returnStatement.expression;
                 if (expr) {
                     var type = checkExpressionCached(expr, checkMode);
-                    if (functionFlags & 2 /* Async */) {
-                        // From within an async function you can return either a non-promise value or a promise. Any
-                        // Promise/A+ compatible implementation will always assimilate any foreign promise, so the
-                        // return type of the body should be unwrapped to its awaited type, which should be wrapped in
-                        // the native Promise<T> type by the caller.
+                    if (functionFlags & 2) {
                         type = checkAwaitedType(type, func, ts.Diagnostics.The_return_type_of_an_async_function_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member);
                     }
-                    if (type.flags & 32768 /* Never */) {
+                    if (type.flags & 32768) {
                         hasReturnOfTypeNever = true;
                     }
                     ts.pushIfUnique(aggregatedTypes, type);
@@ -47000,52 +38880,36 @@ var ts;
             }
             if (strictNullChecks && aggregatedTypes.length && hasReturnWithNoExpression &&
                 !(isJavaScriptConstructor(func) && aggregatedTypes.some(function (t) { return t.symbol === func.symbol; }))) {
-                // Javascript "callable constructors", containing eg `if (!(this instanceof A)) return new A()` should not add undefined
                 ts.pushIfUnique(aggregatedTypes, undefinedType);
             }
             return aggregatedTypes;
         }
         function mayReturnNever(func) {
             switch (func.kind) {
-                case 192 /* FunctionExpression */:
-                case 193 /* ArrowFunction */:
+                case 192:
+                case 193:
                     return true;
-                case 154 /* MethodDeclaration */:
-                    return func.parent.kind === 184 /* ObjectLiteralExpression */;
+                case 154:
+                    return func.parent.kind === 184;
                 default:
                     return false;
             }
         }
-        /**
-         * TypeScript Specification 1.0 (6.3) - July 2014
-         *   An explicitly typed function whose return type isn't the Void type,
-         *   the Any type, or a union type containing the Void or Any type as a constituent
-         *   must have at least one return statement somewhere in its body.
-         *   An exception to this rule is if the function implementation consists of a single 'throw' statement.
-         *
-         * @param returnType - return type of the function, can be undefined if return type is not explicitly specified
-         */
         function checkAllCodePathsInNonVoidFunctionReturnOrThrow(func, returnType) {
             if (!produceDiagnostics) {
                 return;
             }
-            // Functions with with an explicitly specified 'void' or 'any' return type don't need any return expressions.
-            if (returnType && maybeTypeOfKind(returnType, 3 /* AnyOrUnknown */ | 4096 /* Void */)) {
+            if (returnType && maybeTypeOfKind(returnType, 3 | 4096)) {
                 return;
             }
-            // If all we have is a function signature, or an arrow function with an expression body, then there is nothing to check.
-            // also if HasImplicitReturn flag is not set this means that all codepaths in function body end with return or throw
-            if (func.kind === 153 /* MethodSignature */ || ts.nodeIsMissing(func.body) || func.body.kind !== 213 /* Block */ || !functionHasImplicitReturn(func)) {
+            if (func.kind === 153 || ts.nodeIsMissing(func.body) || func.body.kind !== 213 || !functionHasImplicitReturn(func)) {
                 return;
             }
-            var hasExplicitReturn = func.flags & 256 /* HasExplicitReturn */;
-            if (returnType && returnType.flags & 32768 /* Never */) {
+            var hasExplicitReturn = func.flags & 256;
+            if (returnType && returnType.flags & 32768) {
                 error(ts.getEffectiveReturnTypeNode(func), ts.Diagnostics.A_function_returning_never_cannot_have_a_reachable_end_point);
             }
             else if (returnType && !hasExplicitReturn) {
-                // minimal check: function has syntactic return type annotation and no explicit return statements in the body
-                // this function does not conform to the specification.
-                // NOTE: having returnType !== undefined is a precondition for entering this branch so func.type will always be present
                 error(ts.getEffectiveReturnTypeNode(func), ts.Diagnostics.A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value);
             }
             else if (returnType && strictNullChecks && !isTypeAssignableTo(undefinedType, returnType)) {
@@ -47053,9 +38917,6 @@ var ts;
             }
             else if (compilerOptions.noImplicitReturns) {
                 if (!returnType) {
-                    // If return type annotation is omitted check if function has any explicit return statements.
-                    // If it does not have any - its inferred return type is void - don't do any checks.
-                    // Otherwise get inferred return type from function body and report error only if it is not void / anytype
                     if (!hasExplicitReturn) {
                         return;
                     }
@@ -47068,14 +38929,12 @@ var ts;
             }
         }
         function checkFunctionExpressionOrObjectLiteralMethod(node, checkMode) {
-            ts.Debug.assert(node.kind !== 154 /* MethodDeclaration */ || ts.isObjectLiteralMethod(node));
-            // The identityMapper object is used to indicate that function expressions are wildcards
-            if (checkMode === 1 /* SkipContextSensitive */ && isContextSensitive(node)) {
+            ts.Debug.assert(node.kind !== 154 || ts.isObjectLiteralMethod(node));
+            if (checkMode === 1 && isContextSensitive(node)) {
                 return anyFunctionType;
             }
-            // Grammar checking
             var hasGrammarError = checkGrammarFunctionLikeDeclaration(node);
-            if (!hasGrammarError && node.kind === 192 /* FunctionExpression */) {
+            if (!hasGrammarError && node.kind === 192) {
                 checkGrammarForGenerator(node);
             }
             var links = getNodeLinks(node);
@@ -47083,19 +38942,15 @@ var ts;
             if (isTypeAny(type)) {
                 return type;
             }
-            // Check if function expression is contextually typed and assign parameter types if so.
-            if (!(links.flags & 1024 /* ContextChecked */)) {
+            if (!(links.flags & 1024)) {
                 var contextualSignature = getContextualSignature(node);
-                // If a type check is started at a function expression that is an argument of a function call, obtaining the
-                // contextual type may recursively get back to here during overload resolution of the call. If so, we will have
-                // already assigned contextual types.
-                if (!(links.flags & 1024 /* ContextChecked */)) {
-                    links.flags |= 1024 /* ContextChecked */;
+                if (!(links.flags & 1024)) {
+                    links.flags |= 1024;
                     if (contextualSignature) {
-                        var signature = getSignaturesOfType(type, 0 /* Call */)[0];
+                        var signature = getSignaturesOfType(type, 0)[0];
                         if (isContextSensitive(node)) {
                             var contextualMapper = getContextualMapper(node);
-                            if (checkMode === 2 /* Inferential */) {
+                            if (checkMode === 2) {
                                 inferFromAnnotatedParameters(signature, contextualSignature, contextualMapper);
                             }
                             var instantiatedContextualSignature = contextualMapper === identityMapper ?
@@ -47116,42 +38971,31 @@ var ts;
             return type;
         }
         function checkFunctionExpressionOrObjectLiteralMethodDeferred(node) {
-            ts.Debug.assert(node.kind !== 154 /* MethodDeclaration */ || ts.isObjectLiteralMethod(node));
+            ts.Debug.assert(node.kind !== 154 || ts.isObjectLiteralMethod(node));
             var functionFlags = ts.getFunctionFlags(node);
             var returnTypeNode = ts.getEffectiveReturnTypeNode(node);
             var returnOrPromisedType = returnTypeNode &&
-                ((functionFlags & 3 /* AsyncGenerator */) === 2 /* Async */ ?
-                    checkAsyncFunctionReturnType(node) : // Async function
-                    getTypeFromTypeNode(returnTypeNode)); // AsyncGenerator function, Generator function, or normal function
-            if ((functionFlags & 1 /* Generator */) === 0) { // Async function or normal function
-                // return is not necessary in the body of generators
+                ((functionFlags & 3) === 2 ?
+                    checkAsyncFunctionReturnType(node) :
+                    getTypeFromTypeNode(returnTypeNode));
+            if ((functionFlags & 1) === 0) {
                 checkAllCodePathsInNonVoidFunctionReturnOrThrow(node, returnOrPromisedType);
             }
             if (node.body) {
                 if (!returnTypeNode) {
-                    // There are some checks that are only performed in getReturnTypeFromBody, that may produce errors
-                    // we need. An example is the noImplicitAny errors resulting from widening the return expression
-                    // of a function. Because checking of function expression bodies is deferred, there was never an
-                    // appropriate time to do this during the main walk of the file (see the comment at the top of
-                    // checkFunctionExpressionBodies). So it must be done now.
                     getReturnTypeOfSignature(getSignatureFromDeclaration(node));
                 }
-                if (node.body.kind === 213 /* Block */) {
+                if (node.body.kind === 213) {
                     checkSourceElement(node.body);
                 }
                 else {
-                    // From within an async function you can return either a non-promise value or a promise. Any
-                    // Promise/A+ compatible implementation will always assimilate any foreign promise, so we
-                    // should not be checking assignability of a promise to the return type. Instead, we need to
-                    // check assignability of the awaited type of the expression body against the promised type of
-                    // its return type annotation.
                     var exprType = checkExpression(node.body);
                     if (returnOrPromisedType) {
-                        if ((functionFlags & 3 /* AsyncGenerator */) === 2 /* Async */) { // Async function
+                        if ((functionFlags & 3) === 2) {
                             var awaitedType = checkAwaitedType(exprType, node.body, ts.Diagnostics.The_return_type_of_an_async_function_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member);
                             checkTypeAssignableTo(awaitedType, returnOrPromisedType, node.body);
                         }
-                        else { // Normal function
+                        else {
                             checkTypeAssignableTo(exprType, returnOrPromisedType, node.body);
                         }
                     }
@@ -47159,39 +39003,28 @@ var ts;
             }
         }
         function checkArithmeticOperandType(operand, type, diagnostic) {
-            if (!isTypeAssignableToKind(type, 168 /* NumberLike */)) {
+            if (!isTypeAssignableToKind(type, 168)) {
                 error(operand, diagnostic);
                 return false;
             }
             return true;
         }
         function isReadonlySymbol(symbol) {
-            // The following symbols are considered read-only:
-            // Properties with a 'readonly' modifier
-            // Variables declared with 'const'
-            // Get accessors without matching set accessors
-            // Enum members
-            // Unions and intersections of the above (unions and intersections eagerly set isReadonly on creation)
-            return !!(ts.getCheckFlags(symbol) & 8 /* Readonly */ ||
-                symbol.flags & 4 /* Property */ && ts.getDeclarationModifierFlagsFromSymbol(symbol) & 64 /* Readonly */ ||
-                symbol.flags & 3 /* Variable */ && getDeclarationNodeFlagsFromSymbol(symbol) & 2 /* Const */ ||
-                symbol.flags & 98304 /* Accessor */ && !(symbol.flags & 65536 /* SetAccessor */) ||
-                symbol.flags & 8 /* EnumMember */);
+            return !!(ts.getCheckFlags(symbol) & 8 ||
+                symbol.flags & 4 && ts.getDeclarationModifierFlagsFromSymbol(symbol) & 64 ||
+                symbol.flags & 3 && getDeclarationNodeFlagsFromSymbol(symbol) & 2 ||
+                symbol.flags & 98304 && !(symbol.flags & 65536) ||
+                symbol.flags & 8);
         }
         function isReferenceToReadonlyEntity(expr, symbol) {
             if (isReadonlySymbol(symbol)) {
-                // Allow assignments to readonly properties within constructors of the same class declaration.
-                if (symbol.flags & 4 /* Property */ &&
-                    (expr.kind === 185 /* PropertyAccessExpression */ || expr.kind === 186 /* ElementAccessExpression */) &&
-                    expr.expression.kind === 99 /* ThisKeyword */) {
-                    // Look for if this is the constructor for the class that `symbol` is a property of.
+                if (symbol.flags & 4 &&
+                    (expr.kind === 185 || expr.kind === 186) &&
+                    expr.expression.kind === 99) {
                     var func = ts.getContainingFunction(expr);
-                    if (!(func && func.kind === 155 /* Constructor */)) {
+                    if (!(func && func.kind === 155)) {
                         return true;
                     }
-                    // If func.parent is a class and symbol is a (readonly) property of that class, or
-                    // if func is a constructor and symbol is a (readonly) parameter property declared in it,
-                    // then symbol is writeable here.
                     return !(func.parent === symbol.valueDeclaration.parent || func === symbol.valueDeclaration.parent);
                 }
                 return true;
@@ -47199,22 +39032,21 @@ var ts;
             return false;
         }
         function isReferenceThroughNamespaceImport(expr) {
-            if (expr.kind === 185 /* PropertyAccessExpression */ || expr.kind === 186 /* ElementAccessExpression */) {
+            if (expr.kind === 185 || expr.kind === 186) {
                 var node = ts.skipParentheses(expr.expression);
-                if (node.kind === 71 /* Identifier */) {
+                if (node.kind === 71) {
                     var symbol = getNodeLinks(node).resolvedSymbol;
-                    if (symbol.flags & 2097152 /* Alias */) {
+                    if (symbol.flags & 2097152) {
                         var declaration = getDeclarationOfAliasSymbol(symbol);
-                        return !!declaration && declaration.kind === 246 /* NamespaceImport */;
+                        return !!declaration && declaration.kind === 246;
                     }
                 }
             }
             return false;
         }
         function checkReferenceExpression(expr, invalidReferenceMessage) {
-            // References are combinations of identifiers, parentheses, and property accesses.
-            var node = ts.skipOuterExpressions(expr, 2 /* Assertions */ | 1 /* Parentheses */);
-            if (node.kind !== 71 /* Identifier */ && node.kind !== 185 /* PropertyAccessExpression */ && node.kind !== 186 /* ElementAccessExpression */) {
+            var node = ts.skipOuterExpressions(expr, 2 | 1);
+            if (node.kind !== 71 && node.kind !== 185 && node.kind !== 186) {
                 error(expr, invalidReferenceMessage);
                 return false;
             }
@@ -47223,7 +39055,7 @@ var ts;
         function checkDeleteExpression(node) {
             checkExpression(node.expression);
             var expr = ts.skipParentheses(node.expression);
-            if (expr.kind !== 185 /* PropertyAccessExpression */ && expr.kind !== 186 /* ElementAccessExpression */) {
+            if (expr.kind !== 185 && expr.kind !== 186) {
                 error(expr, ts.Diagnostics.The_operand_of_a_delete_operator_must_be_a_property_reference);
                 return booleanType;
             }
@@ -47243,9 +39075,8 @@ var ts;
             return undefinedWideningType;
         }
         function checkAwaitExpression(node) {
-            // Grammar checking
             if (produceDiagnostics) {
-                if (!(node.flags & 16384 /* AwaitContext */)) {
+                if (!(node.flags & 16384)) {
                     grammarErrorOnFirstToken(node, ts.Diagnostics.await_expression_is_only_allowed_within_an_async_function);
                 }
                 if (isInParameterInitializerBeforeContainingFunction(node)) {
@@ -47260,33 +39091,32 @@ var ts;
             if (operandType === silentNeverType) {
                 return silentNeverType;
             }
-            if (node.operand.kind === 8 /* NumericLiteral */) {
-                if (node.operator === 38 /* MinusToken */) {
+            if (node.operand.kind === 8) {
+                if (node.operator === 38) {
                     return getFreshTypeOfLiteralType(getLiteralType(-node.operand.text));
                 }
-                else if (node.operator === 37 /* PlusToken */) {
+                else if (node.operator === 37) {
                     return getFreshTypeOfLiteralType(getLiteralType(+node.operand.text));
                 }
             }
             switch (node.operator) {
-                case 37 /* PlusToken */:
-                case 38 /* MinusToken */:
-                case 52 /* TildeToken */:
+                case 37:
+                case 38:
+                case 52:
                     checkNonNullType(operandType, node.operand);
-                    if (maybeTypeOfKind(operandType, 3072 /* ESSymbolLike */)) {
+                    if (maybeTypeOfKind(operandType, 3072)) {
                         error(node.operand, ts.Diagnostics.The_0_operator_cannot_be_applied_to_type_symbol, ts.tokenToString(node.operator));
                     }
                     return numberType;
-                case 51 /* ExclamationToken */:
-                    var facts = getTypeFacts(operandType) & (1048576 /* Truthy */ | 2097152 /* Falsy */);
-                    return facts === 1048576 /* Truthy */ ? falseType :
-                        facts === 2097152 /* Falsy */ ? trueType :
+                case 51:
+                    var facts = getTypeFacts(operandType) & (1048576 | 2097152);
+                    return facts === 1048576 ? falseType :
+                        facts === 2097152 ? trueType :
                             booleanType;
-                case 43 /* PlusPlusToken */:
-                case 44 /* MinusMinusToken */:
+                case 43:
+                case 44:
                     var ok = checkArithmeticOperandType(node.operand, checkNonNullType(operandType, node.operand), ts.Diagnostics.An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type);
                     if (ok) {
-                        // run check only if former checks succeeded to avoid reporting cascading errors
                         checkReferenceExpression(node.operand, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_or_a_property_access);
                     }
                     return numberType;
@@ -47300,18 +39130,15 @@ var ts;
             }
             var ok = checkArithmeticOperandType(node.operand, checkNonNullType(operandType, node.operand), ts.Diagnostics.An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type);
             if (ok) {
-                // run check only if former checks succeeded to avoid reporting cascading errors
                 checkReferenceExpression(node.operand, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_or_a_property_access);
             }
             return numberType;
         }
-        // Return true if type might be of the given kind. A union or intersection type might be of a given
-        // kind if at least one constituent type is of the given kind.
         function maybeTypeOfKind(type, kind) {
-            if (type.flags & kind & ~134217728 /* GenericMappedType */ || kind & 134217728 /* GenericMappedType */ && isGenericMappedType(type)) {
+            if (type.flags & kind & ~134217728 || kind & 134217728 && isGenericMappedType(type)) {
                 return true;
             }
-            if (type.flags & 786432 /* UnionOrIntersection */) {
+            if (type.flags & 786432) {
                 var types = type.types;
                 for (var _i = 0, types_16 = types; _i < types_16.length; _i++) {
                     var t = types_16[_i];
@@ -47326,44 +39153,38 @@ var ts;
             if (source.flags & kind) {
                 return true;
             }
-            if (strict && source.flags & (3 /* AnyOrUnknown */ | 4096 /* Void */ | 8192 /* Undefined */ | 16384 /* Null */)) {
+            if (strict && source.flags & (3 | 4096 | 8192 | 16384)) {
                 return false;
             }
-            return !!(kind & 168 /* NumberLike */) && isTypeAssignableTo(source, numberType) ||
-                !!(kind & 68 /* StringLike */) && isTypeAssignableTo(source, stringType) ||
-                !!(kind & 272 /* BooleanLike */) && isTypeAssignableTo(source, booleanType) ||
-                !!(kind & 4096 /* Void */) && isTypeAssignableTo(source, voidType) ||
-                !!(kind & 32768 /* Never */) && isTypeAssignableTo(source, neverType) ||
-                !!(kind & 16384 /* Null */) && isTypeAssignableTo(source, nullType) ||
-                !!(kind & 8192 /* Undefined */) && isTypeAssignableTo(source, undefinedType) ||
-                !!(kind & 1024 /* ESSymbol */) && isTypeAssignableTo(source, esSymbolType) ||
-                !!(kind & 16777216 /* NonPrimitive */) && isTypeAssignableTo(source, nonPrimitiveType);
+            return !!(kind & 168) && isTypeAssignableTo(source, numberType) ||
+                !!(kind & 68) && isTypeAssignableTo(source, stringType) ||
+                !!(kind & 272) && isTypeAssignableTo(source, booleanType) ||
+                !!(kind & 4096) && isTypeAssignableTo(source, voidType) ||
+                !!(kind & 32768) && isTypeAssignableTo(source, neverType) ||
+                !!(kind & 16384) && isTypeAssignableTo(source, nullType) ||
+                !!(kind & 8192) && isTypeAssignableTo(source, undefinedType) ||
+                !!(kind & 1024) && isTypeAssignableTo(source, esSymbolType) ||
+                !!(kind & 16777216) && isTypeAssignableTo(source, nonPrimitiveType);
         }
         function allTypesAssignableToKind(source, kind, strict) {
-            return source.flags & 262144 /* Union */ ?
+            return source.flags & 262144 ?
                 ts.every(source.types, function (subType) { return allTypesAssignableToKind(subType, kind, strict); }) :
                 isTypeAssignableToKind(source, kind, strict);
         }
         function isConstEnumObjectType(type) {
-            return !!(ts.getObjectFlags(type) & 16 /* Anonymous */) && !!type.symbol && isConstEnumSymbol(type.symbol);
+            return !!(ts.getObjectFlags(type) & 16) && !!type.symbol && isConstEnumSymbol(type.symbol);
         }
         function isConstEnumSymbol(symbol) {
-            return (symbol.flags & 128 /* ConstEnum */) !== 0;
+            return (symbol.flags & 128) !== 0;
         }
         function checkInstanceOfExpression(left, right, leftType, rightType) {
             if (leftType === silentNeverType || rightType === silentNeverType) {
                 return silentNeverType;
             }
-            // TypeScript 1.0 spec (April 2014): 4.15.4
-            // The instanceof operator requires the left operand to be of type Any, an object type, or a type parameter type,
-            // and the right operand to be of type Any, a subtype of the 'Function' interface type, or have a call or construct signature.
-            // The result is always of the Boolean primitive type.
-            // NOTE: do not raise error if leftType is unknown as related error was already reported
             if (!isTypeAny(leftType) &&
-                allTypesAssignableToKind(leftType, 32764 /* Primitive */)) {
+                allTypesAssignableToKind(leftType, 32764)) {
                 error(left, ts.Diagnostics.The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_parameter);
             }
-            // NOTE: do not raise error if right is unknown as related error was already reported
             if (!(isTypeAny(rightType) || typeHasCallOrConstructSignatures(rightType) || isTypeSubtypeOf(rightType, globalFunctionType))) {
                 error(right, ts.Diagnostics.The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_Function_interface_type);
             }
@@ -47375,14 +39196,10 @@ var ts;
             }
             leftType = checkNonNullType(leftType, left);
             rightType = checkNonNullType(rightType, right);
-            // TypeScript 1.0 spec (April 2014): 4.15.5
-            // The in operator requires the left operand to be of type Any, the String primitive type, or the Number primitive type,
-            // and the right operand to be of type Any, an object type, or a type parameter type.
-            // The result is always of the Boolean primitive type.
-            if (!(isTypeComparableTo(leftType, stringType) || isTypeAssignableToKind(leftType, 168 /* NumberLike */ | 3072 /* ESSymbolLike */))) {
+            if (!(isTypeComparableTo(leftType, stringType) || isTypeAssignableToKind(leftType, 168 | 3072))) {
                 error(left, ts.Diagnostics.The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol);
             }
-            if (!isTypeAssignableToKind(rightType, 16777216 /* NonPrimitive */ | 14745600 /* InstantiableNonPrimitive */)) {
+            if (!isTypeAssignableToKind(rightType, 16777216 | 14745600)) {
                 error(right, ts.Diagnostics.The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter);
             }
             return booleanType;
@@ -47398,11 +39215,10 @@ var ts;
             }
             return sourceType;
         }
-        /** Note: If property cannot be a SpreadAssignment, then allProperties does not need to be provided */
         function checkObjectLiteralDestructuringPropertyAssignment(objectLiteralType, property, allProperties) {
-            if (property.kind === 270 /* PropertyAssignment */ || property.kind === 271 /* ShorthandPropertyAssignment */) {
+            if (property.kind === 270 || property.kind === 271) {
                 var name = property.name;
-                if (name.kind === 147 /* ComputedPropertyName */) {
+                if (name.kind === 147) {
                     checkComputedPropertyName(name);
                 }
                 if (isComputedNonLiteralName(name)) {
@@ -47412,14 +39228,13 @@ var ts;
                 var type = isTypeAny(objectLiteralType)
                     ? objectLiteralType
                     : getTypeOfPropertyOfType(objectLiteralType, text) ||
-                        isNumericLiteralName(text) && getIndexTypeOfType(objectLiteralType, 1 /* Number */) ||
-                        getIndexTypeOfType(objectLiteralType, 0 /* String */);
+                        isNumericLiteralName(text) && getIndexTypeOfType(objectLiteralType, 1) ||
+                        getIndexTypeOfType(objectLiteralType, 0);
                 if (type) {
-                    if (property.kind === 271 /* ShorthandPropertyAssignment */) {
+                    if (property.kind === 271) {
                         return checkDestructuringAssignment(property, type);
                     }
                     else {
-                        // non-shorthand property assignments should always have initializers
                         return checkDestructuringAssignment(property.initializer, type);
                     }
                 }
@@ -47427,9 +39242,9 @@ var ts;
                     error(name, ts.Diagnostics.Type_0_has_no_property_1_and_no_string_index_signature, typeToString(objectLiteralType), ts.declarationNameToString(name));
                 }
             }
-            else if (property.kind === 272 /* SpreadAssignment */) {
-                if (languageVersion < 6 /* ESNext */) {
-                    checkExternalEmitHelpers(property, 4 /* Rest */);
+            else if (property.kind === 272) {
+                if (languageVersion < 6) {
+                    checkExternalEmitHelpers(property, 4);
                 }
                 var nonRestNames = [];
                 if (allProperties) {
@@ -47447,13 +39262,10 @@ var ts;
         }
         function checkArrayLiteralAssignment(node, sourceType, checkMode) {
             var elements = node.elements;
-            if (languageVersion < 2 /* ES2015 */ && compilerOptions.downlevelIteration) {
-                checkExternalEmitHelpers(node, 512 /* Read */);
+            if (languageVersion < 2 && compilerOptions.downlevelIteration) {
+                checkExternalEmitHelpers(node, 512);
             }
-            // This elementType will be used if the specific property corresponding to this index is not
-            // present (aka the tuple element property). This call also checks that the parentType is in
-            // fact an iterable or array (depending on target language).
-            var elementType = checkIteratedTypeOrElementType(sourceType, node, /*allowStringInput*/ false, /*allowAsyncIterables*/ false) || errorType;
+            var elementType = checkIteratedTypeOrElementType(sourceType, node, false, false) || errorType;
             for (var i = 0; i < elements.length; i++) {
                 checkArrayLiteralDestructuringElementAssignment(node, sourceType, i, elementType, checkMode);
             }
@@ -47462,8 +39274,8 @@ var ts;
         function checkArrayLiteralDestructuringElementAssignment(node, sourceType, elementIndex, elementType, checkMode) {
             var elements = node.elements;
             var element = elements[elementIndex];
-            if (element.kind !== 206 /* OmittedExpression */) {
-                if (element.kind !== 204 /* SpreadElement */) {
+            if (element.kind !== 206) {
+                if (element.kind !== 204) {
                     var propName = "" + elementIndex;
                     var type = isTypeAny(sourceType)
                         ? sourceType
@@ -47474,8 +39286,6 @@ var ts;
                         return checkDestructuringAssignment(element, type, checkMode);
                     }
                     else {
-                        // We still need to check element expression here because we may need to set appropriate flag on the expression
-                        // such as NodeCheckFlags.LexicalThis on "this"expression.
                         checkExpression(element);
                         if (isTupleType(sourceType)) {
                             error(element, ts.Diagnostics.Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2, typeToString(sourceType), getTypeReferenceArity(sourceType), elements.length);
@@ -47491,7 +39301,7 @@ var ts;
                     }
                     else {
                         var restExpression = element.expression;
-                        if (restExpression.kind === 200 /* BinaryExpression */ && restExpression.operatorToken.kind === 58 /* EqualsToken */) {
+                        if (restExpression.kind === 200 && restExpression.operatorToken.kind === 58) {
                             error(restExpression.operatorToken, ts.Diagnostics.A_rest_element_cannot_have_an_initializer);
                         }
                         else {
@@ -47505,14 +39315,12 @@ var ts;
         }
         function checkDestructuringAssignment(exprOrAssignment, sourceType, checkMode) {
             var target;
-            if (exprOrAssignment.kind === 271 /* ShorthandPropertyAssignment */) {
+            if (exprOrAssignment.kind === 271) {
                 var prop = exprOrAssignment;
                 if (prop.objectAssignmentInitializer) {
-                    // In strict null checking mode, if a default value of a non-undefined type is specified, remove
-                    // undefined from the final type.
                     if (strictNullChecks &&
-                        !(getFalsyFlags(checkExpression(prop.objectAssignmentInitializer)) & 8192 /* Undefined */)) {
-                        sourceType = getTypeWithFacts(sourceType, 131072 /* NEUndefined */);
+                        !(getFalsyFlags(checkExpression(prop.objectAssignmentInitializer)) & 8192)) {
+                        sourceType = getTypeWithFacts(sourceType, 131072);
                     }
                     checkBinaryLikeExpression(prop.name, prop.equalsToken, prop.objectAssignmentInitializer, checkMode);
                 }
@@ -47521,91 +39329,80 @@ var ts;
             else {
                 target = exprOrAssignment;
             }
-            if (target.kind === 200 /* BinaryExpression */ && target.operatorToken.kind === 58 /* EqualsToken */) {
+            if (target.kind === 200 && target.operatorToken.kind === 58) {
                 checkBinaryExpression(target, checkMode);
                 target = target.left;
             }
-            if (target.kind === 184 /* ObjectLiteralExpression */) {
+            if (target.kind === 184) {
                 return checkObjectLiteralAssignment(target, sourceType);
             }
-            if (target.kind === 183 /* ArrayLiteralExpression */) {
+            if (target.kind === 183) {
                 return checkArrayLiteralAssignment(target, sourceType, checkMode);
             }
             return checkReferenceAssignment(target, sourceType, checkMode);
         }
         function checkReferenceAssignment(target, sourceType, checkMode) {
             var targetType = checkExpression(target, checkMode);
-            var error = target.parent.kind === 272 /* SpreadAssignment */ ?
+            var error = target.parent.kind === 272 ?
                 ts.Diagnostics.The_target_of_an_object_rest_assignment_must_be_a_variable_or_a_property_access :
                 ts.Diagnostics.The_left_hand_side_of_an_assignment_expression_must_be_a_variable_or_a_property_access;
             if (checkReferenceExpression(target, error)) {
-                checkTypeAssignableTo(sourceType, targetType, target, /*headMessage*/ undefined);
+                checkTypeAssignableTo(sourceType, targetType, target, undefined);
             }
             return sourceType;
         }
-        /**
-         * This is a *shallow* check: An expression is side-effect-free if the
-         * evaluation of the expression *itself* cannot produce side effects.
-         * For example, x++ / 3 is side-effect free because the / operator
-         * does not have side effects.
-         * The intent is to "smell test" an expression for correctness in positions where
-         * its value is discarded (e.g. the left side of the comma operator).
-         */
         function isSideEffectFree(node) {
             node = ts.skipParentheses(node);
             switch (node.kind) {
-                case 71 /* Identifier */:
-                case 9 /* StringLiteral */:
-                case 12 /* RegularExpressionLiteral */:
-                case 189 /* TaggedTemplateExpression */:
-                case 202 /* TemplateExpression */:
-                case 13 /* NoSubstitutionTemplateLiteral */:
-                case 8 /* NumericLiteral */:
-                case 101 /* TrueKeyword */:
-                case 86 /* FalseKeyword */:
-                case 95 /* NullKeyword */:
-                case 140 /* UndefinedKeyword */:
-                case 192 /* FunctionExpression */:
-                case 205 /* ClassExpression */:
-                case 193 /* ArrowFunction */:
-                case 183 /* ArrayLiteralExpression */:
-                case 184 /* ObjectLiteralExpression */:
-                case 195 /* TypeOfExpression */:
-                case 209 /* NonNullExpression */:
-                case 256 /* JsxSelfClosingElement */:
-                case 255 /* JsxElement */:
+                case 71:
+                case 9:
+                case 12:
+                case 189:
+                case 202:
+                case 13:
+                case 8:
+                case 101:
+                case 86:
+                case 95:
+                case 140:
+                case 192:
+                case 205:
+                case 193:
+                case 183:
+                case 184:
+                case 195:
+                case 209:
+                case 256:
+                case 255:
                     return true;
-                case 201 /* ConditionalExpression */:
+                case 201:
                     return isSideEffectFree(node.whenTrue) &&
                         isSideEffectFree(node.whenFalse);
-                case 200 /* BinaryExpression */:
+                case 200:
                     if (ts.isAssignmentOperator(node.operatorToken.kind)) {
                         return false;
                     }
                     return isSideEffectFree(node.left) &&
                         isSideEffectFree(node.right);
-                case 198 /* PrefixUnaryExpression */:
-                case 199 /* PostfixUnaryExpression */:
-                    // Unary operators ~, !, +, and - have no side effects.
-                    // The rest do.
+                case 198:
+                case 199:
                     switch (node.operator) {
-                        case 51 /* ExclamationToken */:
-                        case 37 /* PlusToken */:
-                        case 38 /* MinusToken */:
-                        case 52 /* TildeToken */:
+                        case 51:
+                        case 37:
+                        case 38:
+                        case 52:
                             return true;
                     }
                     return false;
-                // Some forms listed here for clarity
-                case 196 /* VoidExpression */: // Explicit opt-out
-                case 190 /* TypeAssertionExpression */: // Not SEF, but can produce useful type warnings
-                case 208 /* AsExpression */: // Not SEF, but can produce useful type warnings
+                case 196:
+                case 190:
+                case 208:
                 default:
                     return false;
             }
         }
         function isTypeEqualityComparableTo(source, target) {
-            return (target.flags & 24576 /* Nullable */) !== 0 || isTypeComparableTo(source, target);
+            return (target.flags & 24576) !== 0 || isTypeComparableTo(source, target);
         }
         function checkBinaryExpression(node, checkMode) {
             if (ts.isInJavaScriptFile(node) && ts.getAssignedJavascriptInitializer(node)) {
@@ -47615,49 +39412,46 @@ var ts;
         }
         function checkBinaryLikeExpression(left, operatorToken, right, checkMode, errorNode) {
             var operator = operatorToken.kind;
-            if (operator === 58 /* EqualsToken */ && (left.kind === 184 /* ObjectLiteralExpression */ || left.kind === 183 /* ArrayLiteralExpression */)) {
+            if (operator === 58 && (left.kind === 184 || left.kind === 183)) {
                 return checkDestructuringAssignment(left, checkExpression(right, checkMode), checkMode);
             }
             var leftType = checkExpression(left, checkMode);
             var rightType = checkExpression(right, checkMode);
             switch (operator) {
-                case 39 /* AsteriskToken */:
-                case 40 /* AsteriskAsteriskToken */:
-                case 61 /* AsteriskEqualsToken */:
-                case 62 /* AsteriskAsteriskEqualsToken */:
-                case 41 /* SlashToken */:
-                case 63 /* SlashEqualsToken */:
-                case 42 /* PercentToken */:
-                case 64 /* PercentEqualsToken */:
-                case 38 /* MinusToken */:
-                case 60 /* MinusEqualsToken */:
-                case 45 /* LessThanLessThanToken */:
-                case 65 /* LessThanLessThanEqualsToken */:
-                case 46 /* GreaterThanGreaterThanToken */:
-                case 66 /* GreaterThanGreaterThanEqualsToken */:
-                case 47 /* GreaterThanGreaterThanGreaterThanToken */:
-                case 67 /* GreaterThanGreaterThanGreaterThanEqualsToken */:
-                case 49 /* BarToken */:
-                case 69 /* BarEqualsToken */:
-                case 50 /* CaretToken */:
-                case 70 /* CaretEqualsToken */:
-                case 48 /* AmpersandToken */:
-                case 68 /* AmpersandEqualsToken */:
+                case 39:
+                case 40:
+                case 61:
+                case 62:
+                case 41:
+                case 63:
+                case 42:
+                case 64:
+                case 38:
+                case 60:
+                case 45:
+                case 65:
+                case 46:
+                case 66:
+                case 47:
+                case 67:
+                case 49:
+                case 69:
+                case 50:
+                case 70:
+                case 48:
+                case 68:
                     if (leftType === silentNeverType || rightType === silentNeverType) {
                         return silentNeverType;
                     }
                     leftType = checkNonNullType(leftType, left);
                     rightType = checkNonNullType(rightType, right);
                     var suggestedOperator = void 0;
-                    // if a user tries to apply a bitwise operator to 2 boolean operands
-                    // try and return them a helpful suggestion
-                    if ((leftType.flags & 272 /* BooleanLike */) &&
-                        (rightType.flags & 272 /* BooleanLike */) &&
+                    if ((leftType.flags & 272) &&
+                        (rightType.flags & 272) &&
                         (suggestedOperator = getSuggestedBooleanOperator(operatorToken.kind)) !== undefined) {
                         error(errorNode || operatorToken, ts.Diagnostics.The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead, ts.tokenToString(operatorToken.kind), ts.tokenToString(suggestedOperator));
                     }
                     else {
-                        // otherwise just check each operand separately and report errors as normal
                         var leftOk = checkArithmeticOperandType(left, leftType, ts.Diagnostics.The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type);
                         var rightOk = checkArithmeticOperandType(right, rightType, ts.Diagnostics.The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type);
                         if (leftOk && rightOk) {
@@ -47665,31 +39459,25 @@ var ts;
                         }
                     }
                     return numberType;
-                case 37 /* PlusToken */:
-                case 59 /* PlusEqualsToken */:
+                case 37:
+                case 59:
                     if (leftType === silentNeverType || rightType === silentNeverType) {
                         return silentNeverType;
                     }
-                    if (!isTypeAssignableToKind(leftType, 68 /* StringLike */) && !isTypeAssignableToKind(rightType, 68 /* StringLike */)) {
+                    if (!isTypeAssignableToKind(leftType, 68) && !isTypeAssignableToKind(rightType, 68)) {
                         leftType = checkNonNullType(leftType, left);
                         rightType = checkNonNullType(rightType, right);
                     }
                     var resultType = void 0;
-                    if (isTypeAssignableToKind(leftType, 168 /* NumberLike */, /*strict*/ true) && isTypeAssignableToKind(rightType, 168 /* NumberLike */, /*strict*/ true)) {
-                        // Operands of an enum type are treated as having the primitive type Number.
-                        // If both operands are of the Number primitive type, the result is of the Number primitive type.
+                    if (isTypeAssignableToKind(leftType, 168, true) && isTypeAssignableToKind(rightType, 168, true)) {
                         resultType = numberType;
                     }
-                    else if (isTypeAssignableToKind(leftType, 68 /* StringLike */, /*strict*/ true) || isTypeAssignableToKind(rightType, 68 /* StringLike */, /*strict*/ true)) {
-                        // If one or both operands are of the String primitive type, the result is of the String primitive type.
+                    else if (isTypeAssignableToKind(leftType, 68, true) || isTypeAssignableToKind(rightType, 68, true)) {
                         resultType = stringType;
                     }
                     else if (isTypeAny(leftType) || isTypeAny(rightType)) {
-                        // Otherwise, the result is of type Any.
-                        // NOTE: unknown type here denotes error type. Old compiler treated this case as any type so do we.
                         resultType = leftType === errorType || rightType === errorType ? errorType : anyType;
                     }
-                    // Symbols are not allowed at all in arithmetic expressions
                     if (resultType && !checkForDisallowedESSymbolOperand(operator)) {
                         return resultType;
                     }
@@ -47697,14 +39485,14 @@ var ts;
                         reportOperatorError();
                         return anyType;
                     }
-                    if (operator === 59 /* PlusEqualsToken */) {
+                    if (operator === 59) {
                         checkAssignmentOperator(resultType);
                     }
                     return resultType;
-                case 27 /* LessThanToken */:
-                case 29 /* GreaterThanToken */:
-                case 30 /* LessThanEqualsToken */:
-                case 31 /* GreaterThanEqualsToken */:
+                case 27:
+                case 29:
+                case 30:
+                case 31:
                     if (checkForDisallowedESSymbolOperand(operator)) {
                         leftType = getBaseTypeOfLiteralType(checkNonNullType(leftType, left));
                         rightType = getBaseTypeOfLiteralType(checkNonNullType(rightType, right));
@@ -47713,10 +39501,10 @@ var ts;
                         }
                     }
                     return booleanType;
-                case 32 /* EqualsEqualsToken */:
-                case 33 /* ExclamationEqualsToken */:
-                case 34 /* EqualsEqualsEqualsToken */:
-                case 35 /* ExclamationEqualsEqualsToken */:
+                case 32:
+                case 33:
+                case 34:
+                case 35:
                     var leftIsLiteral = isLiteralType(leftType);
                     var rightIsLiteral = isLiteralType(rightType);
                     if (!leftIsLiteral || !rightIsLiteral) {
@@ -47727,23 +39515,23 @@ var ts;
                         reportOperatorError();
                     }
                     return booleanType;
-                case 93 /* InstanceOfKeyword */:
+                case 93:
                     return checkInstanceOfExpression(left, right, leftType, rightType);
-                case 92 /* InKeyword */:
+                case 92:
                     return checkInExpression(left, right, leftType, rightType);
-                case 53 /* AmpersandAmpersandToken */:
-                    return getTypeFacts(leftType) & 1048576 /* Truthy */ ?
+                case 53:
+                    return getTypeFacts(leftType) & 1048576 ?
                         getUnionType([extractDefinitelyFalsyTypes(strictNullChecks ? leftType : getBaseTypeOfLiteralType(rightType)), rightType]) :
                         leftType;
-                case 54 /* BarBarToken */:
-                    return getTypeFacts(leftType) & 2097152 /* Falsy */ ?
-                        getUnionType([removeDefinitelyFalsyTypes(leftType), rightType], 2 /* Subtype */) :
+                case 54:
+                    return getTypeFacts(leftType) & 2097152 ?
+                        getUnionType([removeDefinitelyFalsyTypes(leftType), rightType], 2) :
                         leftType;
-                case 58 /* EqualsToken */:
+                case 58:
                     checkSpecialAssignment(left, right);
                     checkAssignmentOperator(rightType);
                     return getRegularTypeOfObjectLiteral(rightType);
-                case 26 /* CommaToken */:
+                case 26:
                     if (!compilerOptions.allowUnreachableCode && isSideEffectFree(left) && !isEvalNode(right)) {
                         error(left, ts.Diagnostics.Left_side_of_comma_operator_is_unused_and_has_no_side_effects);
                     }
@@ -47753,14 +39541,14 @@ var ts;
             }
             function checkSpecialAssignment(left, right) {
                 var special = ts.getSpecialPropertyAssignmentKind(left.parent);
-                if (special === 2 /* ModuleExports */) {
+                if (special === 2) {
                     var rightType_1 = checkExpression(right, checkMode);
                     for (var _i = 0, _a = getPropertiesOfObjectType(rightType_1); _i < _a.length; _i++) {
                         var prop = _a[_i];
                         var propType = getTypeOfSymbol(prop);
-                        if (propType.symbol && propType.symbol.flags & 32 /* Class */) {
+                        if (propType.symbol && propType.symbol.flags & 32) {
                             var name = prop.escapedName;
-                            var symbol = resolveName(prop.valueDeclaration, name, 67901928 /* Type */, undefined, name, /*isUse*/ false);
+                            var symbol = resolveName(prop.valueDeclaration, name, 67901928, undefined, name, false);
                             if (symbol && symbol.declarations.some(ts.isJSDocTypedefTag)) {
                                 grammarErrorOnNode(symbol.declarations[0], ts.Diagnostics.Duplicate_identifier_0, ts.unescapeLeadingUnderscores(name));
                                 return grammarErrorOnNode(prop.valueDeclaration, ts.Diagnostics.Duplicate_identifier_0, ts.unescapeLeadingUnderscores(name));
@@ -47770,12 +39558,11 @@ var ts;
                 }
             }
             function isEvalNode(node) {
-                return node.kind === 71 /* Identifier */ && node.escapedText === "eval";
+                return node.kind === 71 && node.escapedText === "eval";
             }
-            // Return true if there was no error, false if there was an error.
             function checkForDisallowedESSymbolOperand(operator) {
-                var offendingSymbolOperand = maybeTypeOfKind(leftType, 3072 /* ESSymbolLike */) ? left :
-                    maybeTypeOfKind(rightType, 3072 /* ESSymbolLike */) ? right :
+                var offendingSymbolOperand = maybeTypeOfKind(leftType, 3072) ? left :
+                    maybeTypeOfKind(rightType, 3072) ? right :
                         undefined;
                 if (offendingSymbolOperand) {
                     error(offendingSymbolOperand, ts.Diagnostics.The_0_operator_cannot_be_applied_to_type_symbol, ts.tokenToString(operator));
@@ -47785,31 +39572,24 @@ var ts;
             }
             function getSuggestedBooleanOperator(operator) {
                 switch (operator) {
-                    case 49 /* BarToken */:
-                    case 69 /* BarEqualsToken */:
-                        return 54 /* BarBarToken */;
-                    case 50 /* CaretToken */:
-                    case 70 /* CaretEqualsToken */:
-                        return 35 /* ExclamationEqualsEqualsToken */;
-                    case 48 /* AmpersandToken */:
-                    case 68 /* AmpersandEqualsToken */:
-                        return 53 /* AmpersandAmpersandToken */;
+                    case 49:
+                    case 69:
+                        return 54;
+                    case 50:
+                    case 70:
+                        return 35;
+                    case 48:
+                    case 68:
+                        return 53;
                     default:
                         return undefined;
                 }
             }
             function checkAssignmentOperator(valueType) {
                 if (produceDiagnostics && ts.isAssignmentOperator(operator)) {
-                    // TypeScript 1.0 spec (April 2014): 4.17
-                    // An assignment of the form
-                    //    VarExpr = ValueExpr
-                    // requires VarExpr to be classified as a reference
-                    // A compound assignment furthermore requires VarExpr to be classified as a reference (section 4.1)
-                    // and the type of the non-compound operation to be assignable to the type of VarExpr.
                     if (checkReferenceExpression(left, ts.Diagnostics.The_left_hand_side_of_an_assignment_expression_must_be_a_variable_or_a_property_access)
                         && (!ts.isIdentifier(left) || ts.unescapeLeadingUnderscores(left.escapedText) !== "exports")) {
-                        // to avoid cascading errors check assignability only if 'isReference' check succeeded and no errors were reported
-                        checkTypeAssignableTo(valueType, leftType, left, /*headMessage*/ undefined);
+                        checkTypeAssignableTo(valueType, leftType, left, undefined);
                     }
                 }
             }
@@ -47833,9 +39613,8 @@ var ts;
             return false;
         }
         function checkYieldExpression(node) {
-            // Grammar checking
             if (produceDiagnostics) {
-                if (!(node.flags & 4096 /* YieldContext */) || isYieldExpressionInClass(node)) {
+                if (!(node.flags & 4096) || isYieldExpressionInClass(node)) {
                     grammarErrorOnFirstToken(node, ts.Diagnostics.A_yield_expression_is_only_allowed_in_a_generator_body);
                 }
                 if (isInParameterInitializerBeforeContainingFunction(node)) {
@@ -47846,58 +39625,45 @@ var ts;
             if (!func)
                 return anyType;
             var functionFlags = ts.getFunctionFlags(func);
-            if (!(functionFlags & 1 /* Generator */)) {
-                // If the user's code is syntactically correct, the func should always have a star. After all, we are in a yield context.
+            if (!(functionFlags & 1)) {
                 return anyType;
             }
             if (node.asteriskToken) {
-                // Async generator functions prior to ESNext require the __await, __asyncDelegator,
-                // and __asyncValues helpers
-                if ((functionFlags & 3 /* AsyncGenerator */) === 3 /* AsyncGenerator */ &&
-                    languageVersion < 6 /* ESNext */) {
-                    checkExternalEmitHelpers(node, 26624 /* AsyncDelegatorIncludes */);
-                }
-                // Generator functions prior to ES2015 require the __values helper
-                if ((functionFlags & 3 /* AsyncGenerator */) === 1 /* Generator */ &&
-                    languageVersion < 2 /* ES2015 */ && compilerOptions.downlevelIteration) {
-                    checkExternalEmitHelpers(node, 256 /* Values */);
-                }
-            }
-            var isAsync = (functionFlags & 2 /* Async */) !== 0;
-            var yieldedType = getYieldedTypeOfYieldExpression(node, isAsync); // TODO: GH#18217
-            // There is no point in doing an assignability check if the function
-            // has no explicit return type because the return type is directly computed
-            // from the yield expressions.
+                if ((functionFlags & 3) === 3 &&
+                    languageVersion < 6) {
+                    checkExternalEmitHelpers(node, 26624);
+                }
+                if ((functionFlags & 3) === 1 &&
+                    languageVersion < 2 && compilerOptions.downlevelIteration) {
+                    checkExternalEmitHelpers(node, 256);
+                }
+            }
+            var isAsync = (functionFlags & 2) !== 0;
+            var yieldedType = getYieldedTypeOfYieldExpression(node, isAsync);
             var returnType = ts.getEffectiveReturnTypeNode(func);
             if (returnType) {
                 var signatureElementType = getIteratedTypeOfGenerator(getTypeFromTypeNode(returnType), isAsync) || anyType;
-                checkTypeAssignableTo(yieldedType, signatureElementType, node.expression || node, /*headMessage*/ undefined);
+                checkTypeAssignableTo(yieldedType, signatureElementType, node.expression || node, undefined);
             }
-            // Both yield and yield* expressions have type 'any'
             return anyType;
         }
         function checkConditionalExpression(node, checkMode) {
             checkExpression(node.condition);
             var type1 = checkExpression(node.whenTrue, checkMode);
             var type2 = checkExpression(node.whenFalse, checkMode);
-            return getUnionType([type1, type2], 2 /* Subtype */);
+            return getUnionType([type1, type2], 2);
         }
         function checkTemplateExpression(node) {
-            // We just want to check each expressions, but we are unconcerned with
-            // the type of each expression, as any value may be coerced into a string.
-            // It is worth asking whether this is what we really want though.
-            // A place where we actually *are* concerned with the expressions' types are
-            // in tagged templates.
             ts.forEach(node.templateSpans, function (templateSpan) {
-                if (maybeTypeOfKind(checkExpression(templateSpan.expression), 3072 /* ESSymbolLike */)) {
+                if (maybeTypeOfKind(checkExpression(templateSpan.expression), 3072)) {
                     error(templateSpan.expression, ts.Diagnostics.Type_0_cannot_be_converted_to_type_1, typeToString(esSymbolType), typeToString(stringType));
                 }
             });
             return stringType;
         }
         function getContextNode(node) {
-            if (node.kind === 263 /* JsxAttributes */) {
-                return node.parent.parent; // Needs to be the root JsxElement, so it encompasses the attributes _and_ the children (which are essentially part of the attributes)
+            if (node.kind === 263) {
+                return node.parent.parent;
             }
             return node;
         }
@@ -47907,8 +39673,8 @@ var ts;
             var saveContextualMapper = context.contextualMapper;
             context.contextualType = contextualType;
             context.contextualMapper = contextualMapper;
-            var checkMode = contextualMapper === identityMapper ? 1 /* SkipContextSensitive */ :
-                contextualMapper ? 2 /* Inferential */ : 3 /* Contextual */;
+            var checkMode = contextualMapper === identityMapper ? 1 :
+                contextualMapper ? 2 : 3;
             var result = checkExpression(node, checkMode);
             context.contextualType = saveContextualType;
             context.contextualMapper = saveContextualMapper;
@@ -47920,9 +39686,6 @@ var ts;
                 if (checkMode) {
                     return checkExpression(node, checkMode);
                 }
-                // When computing a type that we're going to cache, we need to ignore any ongoing control flow
-                // analysis because variables may have transient types in indeterminable states. Moving flowLoopStart
-                // to the top of the stack ensures all transient types are computed from a known point.
                 var saveFlowLoopStart = flowLoopStart;
                 flowLoopStart = flowLoopCount;
                 links.resolvedType = checkExpression(node, checkMode);
@@ -47932,16 +39695,16 @@ var ts;
         }
         function isTypeAssertion(node) {
             node = ts.skipParentheses(node);
-            return node.kind === 190 /* TypeAssertionExpression */ || node.kind === 208 /* AsExpression */;
+            return node.kind === 190 || node.kind === 208;
         }
         function checkDeclarationInitializer(declaration) {
             var initializer = ts.getEffectiveInitializer(declaration);
-            var type = getTypeOfExpression(initializer, /*cache*/ true);
-            var widened = ts.getCombinedNodeFlags(declaration) & 2 /* Const */ ||
-                (ts.getCombinedModifierFlags(declaration) & 64 /* Readonly */ && !ts.isParameterPropertyDeclaration(declaration)) ||
+            var type = getTypeOfExpression(initializer, true);
+            var widened = ts.getCombinedNodeFlags(declaration) & 2 ||
+                (ts.getCombinedModifierFlags(declaration) & 64 && !ts.isParameterPropertyDeclaration(declaration)) ||
                 isTypeAssertion(initializer) ? type : getWidenedLiteralType(type);
             if (ts.isInJavaScriptFile(declaration)) {
-                if (widened.flags & 24576 /* Nullable */) {
+                if (widened.flags & 24576) {
                     if (noImplicitAny) {
                         reportImplicitAnyError(declaration, anyType);
                     }
@@ -47958,26 +39721,21 @@ var ts;
         }
         function isLiteralOfContextualType(candidateType, contextualType) {
             if (contextualType) {
-                if (contextualType.flags & 786432 /* UnionOrIntersection */) {
+                if (contextualType.flags & 786432) {
                     var types = contextualType.types;
                     return ts.some(types, function (t) { return isLiteralOfContextualType(candidateType, t); });
                 }
-                if (contextualType.flags & 14745600 /* InstantiableNonPrimitive */) {
-                    // If the contextual type is a type variable constrained to a primitive type, consider
-                    // this a literal context for literals of that primitive type. For example, given a
-                    // type parameter 'T extends string', infer string literal types for T.
+                if (contextualType.flags & 14745600) {
                     var constraint = getBaseConstraintOfType(contextualType) || emptyObjectType;
-                    return maybeTypeOfKind(constraint, 4 /* String */) && maybeTypeOfKind(candidateType, 64 /* StringLiteral */) ||
-                        maybeTypeOfKind(constraint, 8 /* Number */) && maybeTypeOfKind(candidateType, 128 /* NumberLiteral */) ||
-                        maybeTypeOfKind(constraint, 1024 /* ESSymbol */) && maybeTypeOfKind(candidateType, 2048 /* UniqueESSymbol */) ||
+                    return maybeTypeOfKind(constraint, 4) && maybeTypeOfKind(candidateType, 64) ||
+                        maybeTypeOfKind(constraint, 8) && maybeTypeOfKind(candidateType, 128) ||
+                        maybeTypeOfKind(constraint, 1024) && maybeTypeOfKind(candidateType, 2048) ||
                         isLiteralOfContextualType(candidateType, constraint);
                 }
-                // If the contextual type is a literal of a particular primitive type, we consider this a
-                // literal context for all literals of that primitive type.
-                return !!(contextualType.flags & (64 /* StringLiteral */ | 1048576 /* Index */) && maybeTypeOfKind(candidateType, 64 /* StringLiteral */) ||
-                    contextualType.flags & 128 /* NumberLiteral */ && maybeTypeOfKind(candidateType, 128 /* NumberLiteral */) ||
-                    contextualType.flags & 256 /* BooleanLiteral */ && maybeTypeOfKind(candidateType, 256 /* BooleanLiteral */) ||
-                    contextualType.flags & 2048 /* UniqueESSymbol */ && maybeTypeOfKind(candidateType, 2048 /* UniqueESSymbol */));
+                return !!(contextualType.flags & (64 | 1048576) && maybeTypeOfKind(candidateType, 64) ||
+                    contextualType.flags & 128 && maybeTypeOfKind(candidateType, 128) ||
+                    contextualType.flags & 256 && maybeTypeOfKind(candidateType, 256) ||
+                    contextualType.flags & 2048 && maybeTypeOfKind(candidateType, 2048));
             }
             return false;
         }
@@ -47990,28 +39748,21 @@ var ts;
                 getWidenedLiteralLikeTypeForContextualType(type, contextualType);
         }
         function checkPropertyAssignment(node, checkMode) {
-            // Do not use hasDynamicName here, because that returns false for well known symbols.
-            // We want to perform checkComputedPropertyName for all computed properties, including
-            // well known symbols.
-            if (node.name.kind === 147 /* ComputedPropertyName */) {
+            if (node.name.kind === 147) {
                 checkComputedPropertyName(node.name);
             }
             return checkExpressionForMutableLocation(node.initializer, checkMode);
         }
         function checkObjectLiteralMethod(node, checkMode) {
-            // Grammar checking
             checkGrammarMethod(node);
-            // Do not use hasDynamicName here, because that returns false for well known symbols.
-            // We want to perform checkComputedPropertyName for all computed properties, including
-            // well known symbols.
-            if (node.name.kind === 147 /* ComputedPropertyName */) {
+            if (node.name.kind === 147) {
                 checkComputedPropertyName(node.name);
             }
             var uninstantiatedType = checkFunctionExpressionOrObjectLiteralMethod(node, checkMode);
             return instantiateTypeWithSingleGenericCallSignature(node, uninstantiatedType, checkMode);
         }
         function instantiateTypeWithSingleGenericCallSignature(node, type, checkMode) {
-            if (checkMode === 2 /* Inferential */) {
+            if (checkMode === 2) {
                 var signature = getSingleCallSignature(type);
                 if (signature && signature.typeParameters) {
                     var contextualType = getApparentTypeOfContextualType(node);
@@ -48025,34 +39776,16 @@ var ts;
             }
             return type;
         }
-        /**
-         * Returns the type of an expression. Unlike checkExpression, this function is simply concerned
-         * with computing the type and may not fully check all contained sub-expressions for errors.
-         * A cache argument of true indicates that if the function performs a full type check, it is ok
-         * to cache the result.
-         */
         function getTypeOfExpression(node, cache) {
-            // Optimize for the common case of a call to a function with a single non-generic call
-            // signature where we can just fetch the return type without checking the arguments.
-            if (node.kind === 187 /* CallExpression */ && node.expression.kind !== 97 /* SuperKeyword */ && !ts.isRequireCall(node, /*checkArgumentIsStringLiteralLike*/ true) && !isSymbolOrSymbolForCall(node)) {
+            if (node.kind === 187 && node.expression.kind !== 97 && !ts.isRequireCall(node, true) && !isSymbolOrSymbolForCall(node)) {
                 var funcType = checkNonNullExpression(node.expression);
                 var signature = getSingleCallSignature(funcType);
                 if (signature && !signature.typeParameters) {
                     return getReturnTypeOfSignature(signature);
                 }
             }
-            // Otherwise simply call checkExpression. Ideally, the entire family of checkXXX functions
-            // should have a parameter that indicates whether full error checking is required such that
-            // we can perform the optimizations locally.
             return cache ? checkExpressionCached(node) : checkExpression(node);
         }
-        /**
-         * Returns the type of an expression. Unlike checkExpression, this function is simply concerned
-         * with computing the type and may not fully check all contained sub-expressions for errors.
-         * It is intended for uses where you know there is no contextual type,
-         * and requesting the contextual type might cause a circularity or other bad behaviour.
-         * It sets the contextual type of the node to any before calling getTypeOfExpression.
-         */
         function getContextFreeTypeOfExpression(node) {
             var saveContextualType = node.contextualType;
             node.contextualType = anyType;
@@ -48063,16 +39796,9 @@ var ts;
         function checkExpresionNoReturn(node) {
             checkExpression(node);
         }
-        // Checks an expression and returns its type. The contextualMapper parameter serves two purposes: When
-        // contextualMapper is not undefined and not equal to the identityMapper function object it indicates that the
-        // expression is being inferentially typed (section 4.15.2 in spec) and provides the type mapper to use in
-        // conjunction with the generic contextual type. When contextualMapper is equal to the identityMapper function
-        // object, it serves as an indicator that all contained function and arrow expressions should be considered to
-        // have the wildcard function type; this form of type check is used during overload resolution to exclude
-        // contextually typed function and arrow expressions in the initial phase.
         function checkExpression(node, checkMode) {
             var type;
-            if (node.kind === 146 /* QualifiedName */) {
+            if (node.kind === 146) {
                 type = checkQualifiedName(node);
             }
             else {
@@ -48080,14 +39806,10 @@ var ts;
                 type = instantiateTypeWithSingleGenericCallSignature(node, uninstantiatedType, checkMode);
             }
             if (isConstEnumObjectType(type)) {
-                // enum object type for const enums are only permitted in:
-                // - 'left' in property access
-                // - 'object' in indexed access
-                // - target in rhs of import statement
-                var ok = (node.parent.kind === 185 /* PropertyAccessExpression */ && node.parent.expression === node) ||
-                    (node.parent.kind === 186 /* ElementAccessExpression */ && node.parent.expression === node) ||
-                    ((node.kind === 71 /* Identifier */ || node.kind === 146 /* QualifiedName */) && isInRightSideOfImportOrExportAssignment(node) ||
-                        (node.parent.kind === 165 /* TypeQuery */ && node.parent.exprName === node));
+                var ok = (node.parent.kind === 185 && node.parent.expression === node) ||
+                    (node.parent.kind === 186 && node.parent.expression === node) ||
+                    ((node.kind === 71 || node.kind === 146) && isInRightSideOfImportOrExportAssignment(node) ||
+                        (node.parent.kind === 165 && node.parent.exprName === node));
                 if (!ok) {
                     error(node, ts.Diagnostics.const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_import_declaration_or_export_assignment_or_type_query);
                 }
@@ -48103,99 +39825,96 @@ var ts;
         }
         function checkExpressionWorker(node, checkMode) {
             switch (node.kind) {
-                case 71 /* Identifier */:
+                case 71:
                     return checkIdentifier(node);
-                case 99 /* ThisKeyword */:
+                case 99:
                     return checkThisExpression(node);
-                case 97 /* SuperKeyword */:
+                case 97:
                     return checkSuperExpression(node);
-                case 95 /* NullKeyword */:
+                case 95:
                     return nullWideningType;
-                case 13 /* NoSubstitutionTemplateLiteral */:
-                case 9 /* StringLiteral */:
+                case 13:
+                case 9:
                     return getFreshTypeOfLiteralType(getLiteralType(node.text));
-                case 8 /* NumericLiteral */:
+                case 8:
                     checkGrammarNumericLiteral(node);
                     return getFreshTypeOfLiteralType(getLiteralType(+node.text));
-                case 101 /* TrueKeyword */:
+                case 101:
                     return trueType;
-                case 86 /* FalseKeyword */:
+                case 86:
                     return falseType;
-                case 202 /* TemplateExpression */:
+                case 202:
                     return checkTemplateExpression(node);
-                case 12 /* RegularExpressionLiteral */:
+                case 12:
                     return globalRegExpType;
-                case 183 /* ArrayLiteralExpression */:
+                case 183:
                     return checkArrayLiteral(node, checkMode);
-                case 184 /* ObjectLiteralExpression */:
+                case 184:
                     return checkObjectLiteral(node, checkMode);
-                case 185 /* PropertyAccessExpression */:
+                case 185:
                     return checkPropertyAccessExpression(node);
-                case 186 /* ElementAccessExpression */:
+                case 186:
                     return checkIndexedAccess(node);
-                case 187 /* CallExpression */:
-                    if (node.expression.kind === 91 /* ImportKeyword */) {
+                case 187:
+                    if (node.expression.kind === 91) {
                         return checkImportCallExpression(node);
                     }
-                /* falls through */
-                case 188 /* NewExpression */:
+                case 188:
                     return checkCallExpression(node);
-                case 189 /* TaggedTemplateExpression */:
+                case 189:
                     return checkTaggedTemplateExpression(node);
-                case 191 /* ParenthesizedExpression */:
+                case 191:
                     return checkParenthesizedExpression(node, checkMode);
-                case 205 /* ClassExpression */:
+                case 205:
                     return checkClassExpression(node);
-                case 192 /* FunctionExpression */:
-                case 193 /* ArrowFunction */:
+                case 192:
+                case 193:
                     return checkFunctionExpressionOrObjectLiteralMethod(node, checkMode);
-                case 195 /* TypeOfExpression */:
+                case 195:
                     return checkTypeOfExpression(node);
-                case 190 /* TypeAssertionExpression */:
-                case 208 /* AsExpression */:
+                case 190:
+                case 208:
                     return checkAssertion(node);
-                case 209 /* NonNullExpression */:
+                case 209:
                     return checkNonNullAssertion(node);
-                case 210 /* MetaProperty */:
+                case 210:
                     return checkMetaProperty(node);
-                case 194 /* DeleteExpression */:
+                case 194:
                     return checkDeleteExpression(node);
-                case 196 /* VoidExpression */:
+                case 196:
                     return checkVoidExpression(node);
-                case 197 /* AwaitExpression */:
+                case 197:
                     return checkAwaitExpression(node);
-                case 198 /* PrefixUnaryExpression */:
+                case 198:
                     return checkPrefixUnaryExpression(node);
-                case 199 /* PostfixUnaryExpression */:
+                case 199:
                     return checkPostfixUnaryExpression(node);
-                case 200 /* BinaryExpression */:
+                case 200:
                     return checkBinaryExpression(node, checkMode);
-                case 201 /* ConditionalExpression */:
+                case 201:
                     return checkConditionalExpression(node, checkMode);
-                case 204 /* SpreadElement */:
+                case 204:
                     return checkSpreadExpression(node, checkMode);
-                case 206 /* OmittedExpression */:
+                case 206:
                     return undefinedWideningType;
-                case 203 /* YieldExpression */:
+                case 203:
                     return checkYieldExpression(node);
-                case 265 /* JsxExpression */:
+                case 265:
                     return checkJsxExpression(node, checkMode);
-                case 255 /* JsxElement */:
+                case 255:
                     return checkJsxElement(node, checkMode);
-                case 256 /* JsxSelfClosingElement */:
+                case 256:
                     return checkJsxSelfClosingElement(node, checkMode);
-                case 259 /* JsxFragment */:
+                case 259:
                     return checkJsxFragment(node, checkMode);
-                case 263 /* JsxAttributes */:
+                case 263:
                     return checkJsxAttributes(node, checkMode);
-                case 257 /* JsxOpeningElement */:
+                case 257:
                     ts.Debug.fail("Shouldn't ever directly check a JsxOpeningElement");
             }
             return errorType;
         }
-        // DECLARATION AND STATEMENT TYPE CHECKING
         function checkTypeParameter(node) {
-            // Grammar Checking
             if (node.expression) {
                 grammarErrorOnFirstToken(node.expression, ts.Diagnostics.Type_expected);
             }
@@ -48218,15 +39937,11 @@ var ts;
             }
         }
         function checkParameter(node) {
-            // Grammar checking
-            // It is a SyntaxError if the Identifier "eval" or the Identifier "arguments" occurs as the
-            // Identifier in a PropertySetParameterList of a PropertyAssignment that is contained in strict code
-            // or if its FunctionBody is strict code(11.1.5).
             checkGrammarDecoratorsAndModifiers(node);
             checkVariableLikeDeclaration(node);
             var func = ts.getContainingFunction(node);
-            if (ts.hasModifier(node, 92 /* ParameterPropertyModifier */)) {
-                if (!(func.kind === 155 /* Constructor */ && ts.nodeIsPresent(func.body))) {
+            if (ts.hasModifier(node, 92)) {
+                if (!(func.kind === 155 && ts.nodeIsPresent(func.body))) {
                     error(node, ts.Diagnostics.A_parameter_property_is_only_allowed_in_a_constructor_implementation);
                 }
             }
@@ -48237,12 +39952,10 @@ var ts;
                 if (func.parameters.indexOf(node) !== 0) {
                     error(node, ts.Diagnostics.A_0_parameter_must_be_the_first_parameter, node.name.escapedText);
                 }
-                if (func.kind === 155 /* Constructor */ || func.kind === 159 /* ConstructSignature */ || func.kind === 164 /* ConstructorType */) {
+                if (func.kind === 155 || func.kind === 159 || func.kind === 164) {
                     error(node, ts.Diagnostics.A_constructor_cannot_have_a_this_parameter);
                 }
             }
-            // Only check rest parameter type if it's not a binding pattern. Since binding patterns are
-            // not allowed in a rest parameter, we already have an error from checkGrammarParameterList.
             if (node.dotDotDotToken && !ts.isBindingPattern(node.name) && !isArrayType(getTypeOfSymbol(node.symbol))) {
                 error(node, ts.Diagnostics.A_rest_parameter_must_be_of_an_array_type);
             }
@@ -48251,7 +39964,7 @@ var ts;
             if (parameterList) {
                 for (var i = 0; i < parameterList.length; i++) {
                     var param = parameterList[i];
-                    if (param.name.kind === 71 /* Identifier */ && param.name.escapedText === parameter.escapedText) {
+                    if (param.name.kind === 71 && param.name.escapedText === parameter.escapedText) {
                         return i;
                     }
                 }
@@ -48261,7 +39974,6 @@ var ts;
         function checkTypePredicate(node) {
             var parent = getTypePredicateParent(node);
             if (!parent) {
-                // The parent must not be valid.
                 error(node, ts.Diagnostics.A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods);
                 return;
             }
@@ -48280,10 +39992,8 @@ var ts;
                         error(parameterName, ts.Diagnostics.A_type_predicate_cannot_reference_a_rest_parameter);
                     }
                     else {
-                        var leadingError = function () { return ts.chainDiagnosticMessages(/*details*/ undefined, ts.Diagnostics.A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type); };
-                        checkTypeAssignableTo(typePredicate.type, getTypeOfNode(parent.parameters[typePredicate.parameterIndex]), // TODO: GH#18217
-                        node.type, 
-                        /*headMessage*/ undefined, leadingError);
+                        var leadingError = function () { return ts.chainDiagnosticMessages(undefined, ts.Diagnostics.A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type); };
+                        checkTypeAssignableTo(typePredicate.type, getTypeOfNode(parent.parameters[typePredicate.parameterIndex]), node.type, undefined, leadingError);
                     }
                 }
                 else if (parameterName) {
@@ -48304,13 +40014,13 @@ var ts;
         }
         function getTypePredicateParent(node) {
             switch (node.parent.kind) {
-                case 193 /* ArrowFunction */:
-                case 158 /* CallSignature */:
-                case 234 /* FunctionDeclaration */:
-                case 192 /* FunctionExpression */:
-                case 163 /* FunctionType */:
-                case 154 /* MethodDeclaration */:
-                case 153 /* MethodSignature */:
+                case 193:
+                case 158:
+                case 234:
+                case 192:
+                case 163:
+                case 154:
+                case 153:
                     var parent = node.parent;
                     if (node === parent.type) {
                         return parent;
@@ -48324,11 +40034,11 @@ var ts;
                     continue;
                 }
                 var name = element.name;
-                if (name.kind === 71 /* Identifier */ && name.escapedText === predicateVariableName) {
+                if (name.kind === 71 && name.escapedText === predicateVariableName) {
                     error(predicateVariableNode, ts.Diagnostics.A_type_predicate_cannot_reference_element_0_in_a_binding_pattern, predicateVariableName);
                     return true;
                 }
-                else if (name.kind === 181 /* ArrayBindingPattern */ || name.kind === 180 /* ObjectBindingPattern */) {
+                else if (name.kind === 181 || name.kind === 180) {
                     if (checkIfTypePredicateVariableIsDeclaredInBindingPattern(name, predicateVariableNode, predicateVariableName)) {
                         return true;
                     }
@@ -48336,35 +40046,28 @@ var ts;
             }
         }
         function checkSignatureDeclaration(node) {
-            // Grammar checking
-            if (node.kind === 160 /* IndexSignature */) {
+            if (node.kind === 160) {
                 checkGrammarIndexSignature(node);
             }
-            // TODO (yuisu): Remove this check in else-if when SyntaxKind.Construct is moved and ambient context is handled
-            else if (node.kind === 163 /* FunctionType */ || node.kind === 234 /* FunctionDeclaration */ || node.kind === 164 /* ConstructorType */ ||
-                node.kind === 158 /* CallSignature */ || node.kind === 155 /* Constructor */ ||
-                node.kind === 159 /* ConstructSignature */) {
+            else if (node.kind === 163 || node.kind === 234 || node.kind === 164 ||
+                node.kind === 158 || node.kind === 155 ||
+                node.kind === 159) {
                 checkGrammarFunctionLikeDeclaration(node);
             }
             var functionFlags = ts.getFunctionFlags(node);
-            if (!(functionFlags & 4 /* Invalid */)) {
-                // Async generators prior to ESNext require the __await and __asyncGenerator helpers
-                if ((functionFlags & 3 /* AsyncGenerator */) === 3 /* AsyncGenerator */ && languageVersion < 6 /* ESNext */) {
-                    checkExternalEmitHelpers(node, 6144 /* AsyncGeneratorIncludes */);
+            if (!(functionFlags & 4)) {
+                if ((functionFlags & 3) === 3 && languageVersion < 6) {
+                    checkExternalEmitHelpers(node, 6144);
                 }
-                // Async functions prior to ES2017 require the __awaiter helper
-                if ((functionFlags & 3 /* AsyncGenerator */) === 2 /* Async */ && languageVersion < 4 /* ES2017 */) {
-                    checkExternalEmitHelpers(node, 64 /* Awaiter */);
+                if ((functionFlags & 3) === 2 && languageVersion < 4) {
+                    checkExternalEmitHelpers(node, 64);
                 }
-                // Generator functions, Async functions, and Async Generator functions prior to
-                // ES2015 require the __generator helper
-                if ((functionFlags & 3 /* AsyncGenerator */) !== 0 /* Normal */ && languageVersion < 2 /* ES2015 */) {
-                    checkExternalEmitHelpers(node, 128 /* Generator */);
+                if ((functionFlags & 3) !== 0 && languageVersion < 2) {
+                    checkExternalEmitHelpers(node, 128);
                 }
             }
             checkTypeParameters(node.typeParameters);
             ts.forEach(node.parameters, checkParameter);
-            // TODO(rbuckton): Should we start checking JSDoc types?
             if (node.type) {
                 checkSourceElement(node.type);
             }
@@ -48373,82 +40076,69 @@ var ts;
                 var returnTypeNode = ts.getEffectiveReturnTypeNode(node);
                 if (noImplicitAny && !returnTypeNode) {
                     switch (node.kind) {
-                        case 159 /* ConstructSignature */:
+                        case 159:
                             error(node, ts.Diagnostics.Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type);
                             break;
-                        case 158 /* CallSignature */:
+                        case 158:
                             error(node, ts.Diagnostics.Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type);
                             break;
                     }
                 }
                 if (returnTypeNode) {
                     var functionFlags_1 = ts.getFunctionFlags(node);
-                    if ((functionFlags_1 & (4 /* Invalid */ | 1 /* Generator */)) === 1 /* Generator */) {
+                    if ((functionFlags_1 & (4 | 1)) === 1) {
                         var returnType = getTypeFromTypeNode(returnTypeNode);
                         if (returnType === voidType) {
                             error(returnTypeNode, ts.Diagnostics.A_generator_cannot_have_a_void_type_annotation);
                         }
                         else {
-                            var generatorElementType = getIteratedTypeOfGenerator(returnType, (functionFlags_1 & 2 /* Async */) !== 0) || anyType;
-                            var iterableIteratorInstantiation = functionFlags_1 & 2 /* Async */
-                                ? createAsyncIterableIteratorType(generatorElementType) // AsyncGenerator function
-                                : createIterableIteratorType(generatorElementType); // Generator function
-                            // Naively, one could check that IterableIterator<any> is assignable to the return type annotation.
-                            // However, that would not catch the error in the following case.
-                            //
-                            //    interface BadGenerator extends Iterable<number>, Iterator<string> { }
-                            //    function* g(): BadGenerator { } // Iterable and Iterator have different types!
-                            //
+                            var generatorElementType = getIteratedTypeOfGenerator(returnType, (functionFlags_1 & 2) !== 0) || anyType;
+                            var iterableIteratorInstantiation = functionFlags_1 & 2
+                                ? createAsyncIterableIteratorType(generatorElementType)
+                                : createIterableIteratorType(generatorElementType);
                             checkTypeAssignableTo(iterableIteratorInstantiation, returnType, returnTypeNode);
                         }
                     }
-                    else if ((functionFlags_1 & 3 /* AsyncGenerator */) === 2 /* Async */) {
+                    else if ((functionFlags_1 & 3) === 2) {
                         checkAsyncFunctionReturnType(node);
                     }
                 }
-                if (node.kind !== 160 /* IndexSignature */ && node.kind !== 284 /* JSDocFunctionType */) {
+                if (node.kind !== 160 && node.kind !== 284) {
                     registerForUnusedIdentifiersCheck(node);
                 }
             }
         }
         function checkClassForDuplicateDeclarations(node) {
-            var Declaration;
-            (function (Declaration) {
-                Declaration[Declaration["Getter"] = 1] = "Getter";
-                Declaration[Declaration["Setter"] = 2] = "Setter";
-                Declaration[Declaration["Method"] = 4] = "Method";
-                Declaration[Declaration["Property"] = 3] = "Property";
-            })(Declaration || (Declaration = {}));
             var instanceNames = ts.createUnderscoreEscapedMap();
             var staticNames = ts.createUnderscoreEscapedMap();
             for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
                 var member = _a[_i];
-                if (member.kind === 155 /* Constructor */) {
+                if (member.kind === 155) {
                     for (var _b = 0, _c = member.parameters; _b < _c.length; _b++) {
                         var param = _c[_b];
                         if (ts.isParameterPropertyDeclaration(param) && !ts.isBindingPattern(param.name)) {
-                            addName(instanceNames, param.name, param.name.escapedText, 3 /* Property */);
+                            addName(instanceNames, param.name, param.name.escapedText, 3);
                         }
                     }
                 }
                 else {
-                    var isStatic = ts.hasModifier(member, 32 /* Static */);
+                    var isStatic = ts.hasModifier(member, 32);
                     var names = isStatic ? staticNames : instanceNames;
                     var name = member.name;
                     var memberName = name && ts.getPropertyNameForPropertyNameNode(name);
                     if (name && memberName) {
                         switch (member.kind) {
-                            case 156 /* GetAccessor */:
-                                addName(names, name, memberName, 1 /* Getter */);
+                            case 156:
+                                addName(names, name, memberName, 1);
                                 break;
-                            case 157 /* SetAccessor */:
-                                addName(names, name, memberName, 2 /* Setter */);
+                            case 157:
+                                addName(names, name, memberName, 2);
                                 break;
-                            case 152 /* PropertyDeclaration */:
-                                addName(names, name, memberName, 3 /* Property */);
+                            case 152:
+                                addName(names, name, memberName, 3);
                                 break;
-                            case 154 /* MethodDeclaration */:
-                                addName(names, name, memberName, 4 /* Method */);
+                            case 154:
+                                addName(names, name, memberName, 4);
                                 break;
                         }
                     }
@@ -48457,8 +40147,8 @@ var ts;
             function addName(names, location, name, meaning) {
                 var prev = names.get(name);
                 if (prev) {
-                    if (prev & 4 /* Method */) {
-                        if (meaning !== 4 /* Method */) {
+                    if (prev & 4) {
+                        if (meaning !== 4) {
                             error(location, ts.Diagnostics.Duplicate_identifier_0, ts.getTextOfNode(location));
                         }
                     }
@@ -48474,22 +40164,11 @@ var ts;
                 }
             }
         }
-        /**
-         * Static members being set on a constructor function may conflict with built-in properties
-         * of Function. Esp. in ECMAScript 5 there are non-configurable and non-writable
-         * built-in properties. This check issues a transpile error when a class has a static
-         * member with the same name as a non-writable built-in property.
-         *
-         * @see http://www.ecma-international.org/ecma-262/5.1/#sec-15.3.3
-         * @see http://www.ecma-international.org/ecma-262/5.1/#sec-15.3.5
-         * @see http://www.ecma-international.org/ecma-262/6.0/#sec-properties-of-the-function-constructor
-         * @see http://www.ecma-international.org/ecma-262/6.0/#sec-function-instances
-         */
         function checkClassForStaticPropertyNameConflicts(node) {
             for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
                 var member = _a[_i];
                 var memberNameNode = member.name;
-                var isStatic = ts.hasModifier(member, 32 /* Static */);
+                var isStatic = ts.hasModifier(member, 32);
                 if (isStatic && memberNameNode) {
                     var memberName = ts.getPropertyNameForPropertyNameNode(memberNameNode);
                     switch (memberName) {
@@ -48510,15 +40189,15 @@ var ts;
             var names = ts.createMap();
             for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
                 var member = _a[_i];
-                if (member.kind === 151 /* PropertySignature */) {
+                if (member.kind === 151) {
                     var memberName = void 0;
                     var name = member.name;
                     switch (name.kind) {
-                        case 9 /* StringLiteral */:
-                        case 8 /* NumericLiteral */:
+                        case 9:
+                        case 8:
                             memberName = name.text;
                             break;
-                        case 71 /* Identifier */:
+                        case 71:
                             memberName = ts.idText(name);
                             break;
                         default:
@@ -48535,17 +40214,12 @@ var ts;
             }
         }
         function checkTypeForDuplicateIndexSignatures(node) {
-            if (node.kind === 236 /* InterfaceDeclaration */) {
+            if (node.kind === 236) {
                 var nodeSymbol = getSymbolOfNode(node);
-                // in case of merging interface declaration it is possible that we'll enter this check procedure several times for every declaration
-                // to prevent this run check only for the first declaration of a given kind
                 if (nodeSymbol.declarations.length > 0 && nodeSymbol.declarations[0] !== node) {
                     return;
                 }
             }
-            // TypeScript 1.0 spec (April 2014)
-            // 3.7.4: An object type can contain at most one string index signature and one numeric index signature.
-            // 8.5: A class declaration can have at most one string index member declaration and one numeric index member declaration
             var indexSymbol = getIndexSymbol(getSymbolOfNode(node));
             if (indexSymbol) {
                 var seenNumericIndexer = false;
@@ -48555,7 +40229,7 @@ var ts;
                     var declaration = decl;
                     if (declaration.parameters.length === 1 && declaration.parameters[0].type) {
                         switch (declaration.parameters[0].type.kind) {
-                            case 137 /* StringKeyword */:
+                            case 137:
                                 if (!seenStringIndexer) {
                                     seenStringIndexer = true;
                                 }
@@ -48563,7 +40237,7 @@ var ts;
                                     error(declaration, ts.Diagnostics.Duplicate_string_index_signature);
                                 }
                                 break;
-                            case 134 /* NumberKeyword */:
+                            case 134:
                                 if (!seenNumericIndexer) {
                                     seenNumericIndexer = true;
                                 }
@@ -48577,37 +40251,28 @@ var ts;
             }
         }
         function checkPropertyDeclaration(node) {
-            // Grammar checking
             if (!checkGrammarDecoratorsAndModifiers(node) && !checkGrammarProperty(node))
                 checkGrammarComputedPropertyName(node.name);
             checkVariableLikeDeclaration(node);
         }
         function checkMethodDeclaration(node) {
-            // Grammar checking
             if (!checkGrammarMethod(node))
                 checkGrammarComputedPropertyName(node.name);
-            // Grammar checking for modifiers is done inside the function checkGrammarFunctionLikeDeclaration
             checkFunctionOrMethodDeclaration(node);
-            // Abstract methods cannot have an implementation.
-            // Extra checks are to avoid reporting multiple errors relating to the "abstractness" of the node.
-            if (ts.hasModifier(node, 128 /* Abstract */) && node.kind === 154 /* MethodDeclaration */ && node.body) {
+            if (ts.hasModifier(node, 128) && node.kind === 154 && node.body) {
                 error(node, ts.Diagnostics.Method_0_cannot_have_an_implementation_because_it_is_marked_abstract, ts.declarationNameToString(node.name));
             }
         }
         function checkConstructorDeclaration(node) {
-            // Grammar check on signature of constructor and modifier of the constructor is done in checkSignatureDeclaration function.
             checkSignatureDeclaration(node);
-            // Grammar check for checking only related to constructorDeclaration
             if (!checkGrammarConstructorTypeParameters(node))
                 checkGrammarConstructorTypeAnnotation(node);
             checkSourceElement(node.body);
             var symbol = getSymbolOfNode(node);
             var firstDeclaration = ts.getDeclarationOfKind(symbol, node.kind);
-            // Only type check the symbol once
             if (node === firstDeclaration) {
                 checkFunctionOrConstructorSymbol(symbol);
             }
-            // exit early in the case of signature - super checks are not relevant to them
             if (ts.nodeIsMissing(node.body)) {
                 return;
             }
@@ -48615,13 +40280,10 @@ var ts;
                 return;
             }
             function isInstancePropertyWithInitializer(n) {
-                return n.kind === 152 /* PropertyDeclaration */ &&
-                    !ts.hasModifier(n, 32 /* Static */) &&
+                return n.kind === 152 &&
+                    !ts.hasModifier(n, 32) &&
                     !!n.initializer;
             }
-            // TS 1.0 spec (April 2014): 8.3.2
-            // Constructors of classes with no extends clause may not contain super calls, whereas
-            // constructors of derived classes must contain at least one super call somewhere in their function body.
             var containingClassDecl = node.parent;
             if (ts.getClassExtendsHeritageClauseElement(containingClassDecl)) {
                 captureLexicalThis(node.parent, containingClassDecl);
@@ -48631,21 +40293,14 @@ var ts;
                     if (classExtendsNull) {
                         error(superCall, ts.Diagnostics.A_constructor_cannot_contain_a_super_call_when_its_class_extends_null);
                     }
-                    // The first statement in the body of a constructor (excluding prologue directives) must be a super call
-                    // if both of the following are true:
-                    // - The containing class is a derived class.
-                    // - The constructor declares parameter properties
-                    //   or the containing class declares instance member variables with initializers.
                     var superCallShouldBeFirst = ts.some(node.parent.members, isInstancePropertyWithInitializer) ||
-                        ts.some(node.parameters, function (p) { return ts.hasModifier(p, 92 /* ParameterPropertyModifier */); });
-                    // Skip past any prologue directives to find the first statement
-                    // to ensure that it was a super call.
+                        ts.some(node.parameters, function (p) { return ts.hasModifier(p, 92); });
                     if (superCallShouldBeFirst) {
                         var statements = node.body.statements;
                         var superCallStatement = void 0;
                         for (var _i = 0, statements_2 = statements; _i < statements_2.length; _i++) {
                             var statement = statements_2[_i];
-                            if (statement.kind === 216 /* ExpressionStatement */ && ts.isSuperCall(statement.expression)) {
+                            if (statement.kind === 216 && ts.isSuperCall(statement.expression)) {
                                 superCallStatement = statement;
                                 break;
                             }
@@ -48665,46 +40320,38 @@ var ts;
         }
         function checkAccessorDeclaration(node) {
             if (produceDiagnostics) {
-                // Grammar checking accessors
                 if (!checkGrammarFunctionLikeDeclaration(node) && !checkGrammarAccessor(node))
                     checkGrammarComputedPropertyName(node.name);
                 checkDecorators(node);
                 checkSignatureDeclaration(node);
-                if (node.kind === 156 /* GetAccessor */) {
-                    if (!(node.flags & 4194304 /* Ambient */) && ts.nodeIsPresent(node.body) && (node.flags & 128 /* HasImplicitReturn */)) {
-                        if (!(node.flags & 256 /* HasExplicitReturn */)) {
+                if (node.kind === 156) {
+                    if (!(node.flags & 4194304) && ts.nodeIsPresent(node.body) && (node.flags & 128)) {
+                        if (!(node.flags & 256)) {
                             error(node.name, ts.Diagnostics.A_get_accessor_must_return_a_value);
                         }
                     }
                 }
-                // Do not use hasDynamicName here, because that returns false for well known symbols.
-                // We want to perform checkComputedPropertyName for all computed properties, including
-                // well known symbols.
-                if (node.name.kind === 147 /* ComputedPropertyName */) {
+                if (node.name.kind === 147) {
                     checkComputedPropertyName(node.name);
                 }
                 if (!hasNonBindableDynamicName(node)) {
-                    // TypeScript 1.0 spec (April 2014): 8.4.3
-                    // Accessors for the same member name must specify the same accessibility.
-                    var otherKind = node.kind === 156 /* GetAccessor */ ? 157 /* SetAccessor */ : 156 /* GetAccessor */;
+                    var otherKind = node.kind === 156 ? 157 : 156;
                     var otherAccessor = ts.getDeclarationOfKind(getSymbolOfNode(node), otherKind);
                     if (otherAccessor) {
                         var nodeFlags = ts.getModifierFlags(node);
                         var otherFlags = ts.getModifierFlags(otherAccessor);
-                        if ((nodeFlags & 28 /* AccessibilityModifier */) !== (otherFlags & 28 /* AccessibilityModifier */)) {
+                        if ((nodeFlags & 28) !== (otherFlags & 28)) {
                             error(node.name, ts.Diagnostics.Getter_and_setter_accessors_do_not_agree_in_visibility);
                         }
-                        if ((nodeFlags & 128 /* Abstract */) !== (otherFlags & 128 /* Abstract */)) {
+                        if ((nodeFlags & 128) !== (otherFlags & 128)) {
                             error(node.name, ts.Diagnostics.Accessors_must_both_be_abstract_or_non_abstract);
                         }
-                        // TypeScript 1.0 spec (April 2014): 4.5
-                        // If both accessors include type annotations, the specified types must be identical.
                         checkAccessorDeclarationTypesIdentical(node, otherAccessor, getAnnotatedAccessorType, ts.Diagnostics.get_and_set_accessor_must_have_the_same_type);
                         checkAccessorDeclarationTypesIdentical(node, otherAccessor, getThisTypeOfDeclaration, ts.Diagnostics.get_and_set_accessor_must_have_the_same_this_type);
                     }
                 }
                 var returnType = getTypeOfAccessors(getSymbolOfNode(node));
-                if (node.kind === 156 /* GetAccessor */) {
+                if (node.kind === 156) {
                     checkAllCodePathsInNonVoidFunctionReturnOrThrow(node, returnType);
                 }
             }
@@ -48744,21 +40391,20 @@ var ts;
             if (type !== errorType) {
                 var symbol = getNodeLinks(node).resolvedSymbol;
                 if (symbol) {
-                    return symbol.flags & 524288 /* TypeAlias */ && getSymbolLinks(symbol).typeParameters ||
-                        (ts.getObjectFlags(type) & 4 /* Reference */ ? type.target.localTypeParameters : undefined);
+                    return symbol.flags & 524288 && getSymbolLinks(symbol).typeParameters ||
+                        (ts.getObjectFlags(type) & 4 ? type.target.localTypeParameters : undefined);
                 }
             }
             return undefined;
         }
         function checkTypeReferenceNode(node) {
             checkGrammarTypeArguments(node, node.typeArguments);
-            if (node.kind === 162 /* TypeReference */ && node.typeName.jsdocDotPos !== undefined && !ts.isInJavaScriptFile(node) && !ts.isInJSDoc(node)) {
+            if (node.kind === 162 && node.typeName.jsdocDotPos !== undefined && !ts.isInJavaScriptFile(node) && !ts.isInJSDoc(node)) {
                 grammarErrorAtPos(node, node.typeName.jsdocDotPos, 1, ts.Diagnostics.JSDoc_types_can_only_be_used_inside_documentation_comments);
             }
             var type = getTypeFromTypeReference(node);
             if (type !== errorType) {
                 if (node.typeArguments) {
-                    // Do type argument local checks only if referenced type is successfully resolved
                     ts.forEach(node.typeArguments, checkSourceElement);
                     if (produceDiagnostics) {
                         var typeParameters = getTypeParametersForTypeReference(node);
@@ -48767,7 +40413,7 @@ var ts;
                         }
                     }
                 }
-                if (type.flags & 32 /* Enum */ && getNodeLinks(node).resolvedSymbol.flags & 8 /* EnumMember */) {
+                if (type.flags & 32 && getNodeLinks(node).resolvedSymbol.flags & 8) {
                     error(node, ts.Diagnostics.Enum_type_0_has_members_with_initializers_that_are_not_literals, typeToString(type));
                 }
             }
@@ -48776,7 +40422,7 @@ var ts;
             var typeReferenceNode = ts.tryCast(node.parent, ts.isTypeReferenceType);
             if (!typeReferenceNode)
                 return undefined;
-            var typeParameters = getTypeParametersForTypeReference(typeReferenceNode); // TODO: GH#18217
+            var typeParameters = getTypeParametersForTypeReference(typeReferenceNode);
             var constraint = getConstraintOfTypeParameter(typeParameters[typeReferenceNode.typeArguments.indexOf(node)]);
             return constraint && instantiateType(constraint, createTypeMapper(typeParameters, getEffectiveTypeArguments(typeReferenceNode, typeParameters)));
         }
@@ -48796,7 +40442,6 @@ var ts;
             checkSourceElement(node.elementType);
         }
         function checkTupleType(node) {
-            // Grammar checking
             var hasErrorFromDisallowedTrailingComma = checkGrammarForDisallowedTrailingComma(node.elementTypes);
             if (!hasErrorFromDisallowedTrailingComma && node.elementTypes.length === 0) {
                 grammarErrorOnNode(node, ts.Diagnostics.A_tuple_type_element_list_cannot_be_empty);
@@ -48807,22 +40452,19 @@ var ts;
             ts.forEach(node.types, checkSourceElement);
         }
         function checkIndexedAccessIndexType(type, accessNode) {
-            if (!(type.flags & 2097152 /* IndexedAccess */)) {
+            if (!(type.flags & 2097152)) {
                 return type;
             }
-            // Check if the index type is assignable to 'keyof T' for the object type.
             var objectType = type.objectType;
             var indexType = type.indexType;
-            if (isTypeAssignableTo(indexType, getIndexType(objectType, /*stringsOnly*/ false))) {
-                if (accessNode.kind === 186 /* ElementAccessExpression */ && ts.isAssignmentTarget(accessNode) &&
-                    ts.getObjectFlags(objectType) & 32 /* Mapped */ && getMappedTypeModifiers(objectType) & 1 /* IncludeReadonly */) {
+            if (isTypeAssignableTo(indexType, getIndexType(objectType, false))) {
+                if (accessNode.kind === 186 && ts.isAssignmentTarget(accessNode) &&
+                    ts.getObjectFlags(objectType) & 32 && getMappedTypeModifiers(objectType) & 1) {
                     error(accessNode, ts.Diagnostics.Index_signature_in_type_0_only_permits_reading, typeToString(objectType));
                 }
                 return type;
             }
-            // Check if we're indexing with a numeric type and if either object or index types
-            // is a generic type with a constraint that has a numeric index signature.
-            if (getIndexInfoOfType(getApparentType(objectType), 1 /* Number */) && isTypeAssignableToKind(indexType, 168 /* NumberLike */)) {
+            if (getIndexInfoOfType(getApparentType(objectType), 1) && isTypeAssignableToKind(indexType, 168)) {
                 return type;
             }
             error(accessNode, ts.Diagnostics.Type_0_cannot_be_used_to_index_type_1, typeToString(indexType), typeToString(objectType));
@@ -48851,7 +40493,7 @@ var ts;
             ts.forEachChild(node, checkSourceElement);
         }
         function checkInferType(node) {
-            if (!ts.findAncestor(node, function (n) { return n.parent && n.parent.kind === 171 /* ConditionalType */ && n.parent.extendsType === n; })) {
+            if (!ts.findAncestor(node, function (n) { return n.parent && n.parent.kind === 171 && n.parent.extendsType === n; })) {
                 grammarErrorOnNode(node, ts.Diagnostics.infer_declarations_are_only_permitted_in_the_extends_clause_of_a_conditional_type);
             }
             checkSourceElement(node.typeParameter);
@@ -48861,21 +40503,18 @@ var ts;
             getTypeFromTypeNode(node);
         }
         function isPrivateWithinAmbient(node) {
-            return ts.hasModifier(node, 8 /* Private */) && !!(node.flags & 4194304 /* Ambient */);
+            return ts.hasModifier(node, 8) && !!(node.flags & 4194304);
         }
         function getEffectiveDeclarationFlags(n, flagsToCheck) {
             var flags = ts.getCombinedModifierFlags(n);
-            // children of classes (even ambient classes) should not be marked as ambient or export
-            // because those flags have no useful semantics there.
-            if (n.parent.kind !== 236 /* InterfaceDeclaration */ &&
-                n.parent.kind !== 235 /* ClassDeclaration */ &&
-                n.parent.kind !== 205 /* ClassExpression */ &&
-                n.flags & 4194304 /* Ambient */) {
-                if (!(flags & 2 /* Ambient */) && !(ts.isModuleBlock(n.parent) && ts.isModuleDeclaration(n.parent.parent) && ts.isGlobalScopeAugmentation(n.parent.parent))) {
-                    // It is nested in an ambient context, which means it is automatically exported
-                    flags |= 1 /* Export */;
-                }
-                flags |= 2 /* Ambient */;
+            if (n.parent.kind !== 236 &&
+                n.parent.kind !== 235 &&
+                n.parent.kind !== 205 &&
+                n.flags & 4194304) {
+                if (!(flags & 2) && !(ts.isModuleBlock(n.parent) && ts.isModuleDeclaration(n.parent.parent) && ts.isGlobalScopeAugmentation(n.parent.parent))) {
+                    flags |= 1;
+                }
+                flags |= 2;
             }
             return flags & flagsToCheck;
         }
@@ -48884,32 +40523,25 @@ var ts;
                 return;
             }
             function getCanonicalOverload(overloads, implementation) {
-                // Consider the canonical set of flags to be the flags of the bodyDeclaration or the first declaration
-                // Error on all deviations from this canonical set of flags
-                // The caveat is that if some overloads are defined in lib.d.ts, we don't want to
-                // report the errors on those. To achieve this, we will say that the implementation is
-                // the canonical signature only if it is in the same container as the first overload
                 var implementationSharesContainerWithFirstOverload = implementation !== undefined && implementation.parent === overloads[0].parent;
                 return implementationSharesContainerWithFirstOverload ? implementation : overloads[0];
             }
             function checkFlagAgreementBetweenOverloads(overloads, implementation, flagsToCheck, someOverloadFlags, allOverloadFlags) {
-                // Error if some overloads have a flag that is not shared by all overloads. To find the
-                // deviations, we XOR someOverloadFlags with allOverloadFlags
                 var someButNotAllOverloadFlags = someOverloadFlags ^ allOverloadFlags;
                 if (someButNotAllOverloadFlags !== 0) {
                     var canonicalFlags_1 = getEffectiveDeclarationFlags(getCanonicalOverload(overloads, implementation), flagsToCheck);
                     ts.forEach(overloads, function (o) {
                         var deviation = getEffectiveDeclarationFlags(o, flagsToCheck) ^ canonicalFlags_1;
-                        if (deviation & 1 /* Export */) {
+                        if (deviation & 1) {
                             error(ts.getNameOfDeclaration(o), ts.Diagnostics.Overload_signatures_must_all_be_exported_or_non_exported);
                         }
-                        else if (deviation & 2 /* Ambient */) {
+                        else if (deviation & 2) {
                             error(ts.getNameOfDeclaration(o), ts.Diagnostics.Overload_signatures_must_all_be_ambient_or_non_ambient);
                         }
-                        else if (deviation & (8 /* Private */ | 16 /* Protected */)) {
+                        else if (deviation & (8 | 16)) {
                             error(ts.getNameOfDeclaration(o) || o, ts.Diagnostics.Overload_signatures_must_all_be_public_private_or_protected);
                         }
-                        else if (deviation & 128 /* Abstract */) {
+                        else if (deviation & 128) {
                             error(ts.getNameOfDeclaration(o), ts.Diagnostics.Overload_signatures_must_all_be_abstract_or_non_abstract);
                         }
                     });
@@ -48926,8 +40558,8 @@ var ts;
                     });
                 }
             }
-            var flagsToCheck = 1 /* Export */ | 2 /* Ambient */ | 8 /* Private */ | 16 /* Protected */ | 128 /* Abstract */;
-            var someNodeFlags = 0 /* None */;
+            var flagsToCheck = 1 | 2 | 8 | 16 | 128;
+            var someNodeFlags = 0;
             var allNodeFlags = flagsToCheck;
             var someHaveQuestionToken = false;
             var allHaveQuestionToken = true;
@@ -48936,7 +40568,7 @@ var ts;
             var lastSeenNonAmbientDeclaration;
             var previousDeclaration;
             var declarations = symbol.declarations;
-            var isConstructor = (symbol.flags & 16384 /* Constructor */) !== 0;
+            var isConstructor = (symbol.flags & 16384) !== 0;
             function reportImplementationExpectedError(node) {
                 if (node.name && ts.nodeIsMissing(node.name)) {
                     return;
@@ -48950,24 +40582,17 @@ var ts;
                         seen = c === node;
                     }
                 });
-                // We may be here because of some extra nodes between overloads that could not be parsed into a valid node.
-                // In this case the subsequent node is not really consecutive (.pos !== node.end), and we must ignore it here.
                 if (subsequentNode && subsequentNode.pos === node.end) {
                     if (subsequentNode.kind === node.kind) {
                         var errorNode_1 = subsequentNode.name || subsequentNode;
-                        // TODO: GH#17345: These are methods, so handle computed name case. (`Always allowing computed property names is *not* the correct behavior!)
                         var subsequentName = subsequentNode.name;
                         if (node.name && subsequentName &&
                             (ts.isComputedPropertyName(node.name) && ts.isComputedPropertyName(subsequentName) ||
                                 !ts.isComputedPropertyName(node.name) && !ts.isComputedPropertyName(subsequentName) && ts.getEscapedTextOfIdentifierOrLiteral(node.name) === ts.getEscapedTextOfIdentifierOrLiteral(subsequentName))) {
-                            var reportError = (node.kind === 154 /* MethodDeclaration */ || node.kind === 153 /* MethodSignature */) &&
-                                ts.hasModifier(node, 32 /* Static */) !== ts.hasModifier(subsequentNode, 32 /* Static */);
-                            // we can get here in two cases
-                            // 1. mixed static and instance class members
-                            // 2. something with the same name was defined before the set of overloads that prevents them from merging
-                            // here we'll report error only for the first case since for second we should already report error in binder
+                            var reportError = (node.kind === 154 || node.kind === 153) &&
+                                ts.hasModifier(node, 32) !== ts.hasModifier(subsequentNode, 32);
                             if (reportError) {
-                                var diagnostic = ts.hasModifier(node, 32 /* Static */) ? ts.Diagnostics.Function_overload_must_be_static : ts.Diagnostics.Function_overload_must_not_be_static;
+                                var diagnostic = ts.hasModifier(node, 32) ? ts.Diagnostics.Function_overload_must_be_static : ts.Diagnostics.Function_overload_must_not_be_static;
                                 error(errorNode_1, diagnostic);
                             }
                             return;
@@ -48983,9 +40608,7 @@ var ts;
                     error(errorNode, ts.Diagnostics.Constructor_implementation_is_missing);
                 }
                 else {
-                    // Report different errors regarding non-consecutive blocks of declarations depending on whether
-                    // the node in question is abstract.
-                    if (ts.hasModifier(node, 128 /* Abstract */)) {
+                    if (ts.hasModifier(node, 128)) {
                         error(errorNode, ts.Diagnostics.All_declarations_of_an_abstract_method_must_be_consecutive);
                     }
                     else {
@@ -48995,22 +40618,15 @@ var ts;
             }
             var duplicateFunctionDeclaration = false;
             var multipleConstructorImplementation = false;
-            for (var _i = 0, declarations_3 = declarations; _i < declarations_3.length; _i++) {
-                var current = declarations_3[_i];
+            for (var _i = 0, declarations_4 = declarations; _i < declarations_4.length; _i++) {
+                var current = declarations_4[_i];
                 var node = current;
-                var inAmbientContext = node.flags & 4194304 /* Ambient */;
-                var inAmbientContextOrInterface = node.parent.kind === 236 /* InterfaceDeclaration */ || node.parent.kind === 166 /* TypeLiteral */ || inAmbientContext;
+                var inAmbientContext = node.flags & 4194304;
+                var inAmbientContextOrInterface = node.parent.kind === 236 || node.parent.kind === 166 || inAmbientContext;
                 if (inAmbientContextOrInterface) {
-                    // check if declarations are consecutive only if they are non-ambient
-                    // 1. ambient declarations can be interleaved
-                    // i.e. this is legal
-                    //     declare function foo();
-                    //     declare function bar();
-                    //     declare function foo();
-                    // 2. mixing ambient and non-ambient declarations is a separate error that will be reported - do not want to report an extra one
                     previousDeclaration = undefined;
                 }
-                if (node.kind === 234 /* FunctionDeclaration */ || node.kind === 154 /* MethodDeclaration */ || node.kind === 153 /* MethodSignature */ || node.kind === 155 /* Constructor */) {
+                if (node.kind === 234 || node.kind === 154 || node.kind === 153 || node.kind === 155) {
                     var currentNodeFlags = getEffectiveDeclarationFlags(node, flagsToCheck);
                     someNodeFlags |= currentNodeFlags;
                     allNodeFlags &= currentNodeFlags;
@@ -49051,9 +40667,8 @@ var ts;
                     error(ts.getNameOfDeclaration(declaration), ts.Diagnostics.Duplicate_function_implementation);
                 });
             }
-            // Abstract methods can't have an implementation -- in particular, they don't need one.
             if (lastSeenNonAmbientDeclaration && !lastSeenNonAmbientDeclaration.body &&
-                !ts.hasModifier(lastSeenNonAmbientDeclaration, 128 /* Abstract */) && !lastSeenNonAmbientDeclaration.questionToken) {
+                !ts.hasModifier(lastSeenNonAmbientDeclaration, 128) && !lastSeenNonAmbientDeclaration.questionToken) {
                 reportImplementationExpectedError(lastSeenNonAmbientDeclaration);
             }
             if (hasOverloads) {
@@ -49076,30 +40691,25 @@ var ts;
             if (!produceDiagnostics) {
                 return;
             }
-            // if localSymbol is defined on node then node itself is exported - check is required
             var symbol = node.localSymbol;
             if (!symbol) {
-                // local symbol is undefined => this declaration is non-exported.
-                // however symbol might contain other declarations that are exported
                 symbol = getSymbolOfNode(node);
                 if (!symbol.exportSymbol) {
-                    // this is a pure local symbol (all declarations are non-exported) - no need to check anything
                     return;
                 }
             }
-            // run the check only for the first declaration in the list
             if (ts.getDeclarationOfKind(symbol, node.kind) !== node) {
                 return;
             }
-            var exportedDeclarationSpaces = 0 /* None */;
-            var nonExportedDeclarationSpaces = 0 /* None */;
-            var defaultExportedDeclarationSpaces = 0 /* None */;
+            var exportedDeclarationSpaces = 0;
+            var nonExportedDeclarationSpaces = 0;
+            var defaultExportedDeclarationSpaces = 0;
             for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
                 var d = _a[_i];
                 var declarationSpaces = getDeclarationSpaces(d);
-                var effectiveDeclarationFlags = getEffectiveDeclarationFlags(d, 1 /* Export */ | 512 /* Default */);
-                if (effectiveDeclarationFlags & 1 /* Export */) {
-                    if (effectiveDeclarationFlags & 512 /* Default */) {
+                var effectiveDeclarationFlags = getEffectiveDeclarationFlags(d, 1 | 512);
+                if (effectiveDeclarationFlags & 1) {
+                    if (effectiveDeclarationFlags & 512) {
                         defaultExportedDeclarationSpaces |= declarationSpaces;
                     }
                     else {
@@ -49110,17 +40720,14 @@ var ts;
                     nonExportedDeclarationSpaces |= declarationSpaces;
                 }
             }
-            // Spaces for anything not declared a 'default export'.
             var nonDefaultExportedDeclarationSpaces = exportedDeclarationSpaces | nonExportedDeclarationSpaces;
             var commonDeclarationSpacesForExportsAndLocals = exportedDeclarationSpaces & nonExportedDeclarationSpaces;
             var commonDeclarationSpacesForDefaultAndNonDefault = defaultExportedDeclarationSpaces & nonDefaultExportedDeclarationSpaces;
             if (commonDeclarationSpacesForExportsAndLocals || commonDeclarationSpacesForDefaultAndNonDefault) {
-                // declaration spaces for exported and non-exported declarations intersect
                 for (var _b = 0, _c = symbol.declarations; _b < _c.length; _b++) {
                     var d = _c[_b];
                     var declarationSpaces = getDeclarationSpaces(d);
                     var name = ts.getNameOfDeclaration(d);
-                    // Only error on the declarations that contributed to the intersecting spaces.
                     if (declarationSpaces & commonDeclarationSpacesForDefaultAndNonDefault) {
                         error(name, ts.Diagnostics.Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead, ts.declarationNameToString(name));
                     }
@@ -49129,51 +40736,40 @@ var ts;
                     }
                 }
             }
-            var DeclarationSpaces;
-            (function (DeclarationSpaces) {
-                DeclarationSpaces[DeclarationSpaces["None"] = 0] = "None";
-                DeclarationSpaces[DeclarationSpaces["ExportValue"] = 1] = "ExportValue";
-                DeclarationSpaces[DeclarationSpaces["ExportType"] = 2] = "ExportType";
-                DeclarationSpaces[DeclarationSpaces["ExportNamespace"] = 4] = "ExportNamespace";
-            })(DeclarationSpaces || (DeclarationSpaces = {}));
             function getDeclarationSpaces(decl) {
                 var d = decl;
                 switch (d.kind) {
-                    case 236 /* InterfaceDeclaration */:
-                    case 237 /* TypeAliasDeclaration */:
-                    // A jsdoc typedef and callback are, by definition, type aliases
-                    case 297 /* JSDocTypedefTag */:
-                    case 292 /* JSDocCallbackTag */:
-                        return 2 /* ExportType */;
-                    case 239 /* ModuleDeclaration */:
-                        return ts.isAmbientModule(d) || ts.getModuleInstanceState(d) !== 0 /* NonInstantiated */
-                            ? 4 /* ExportNamespace */ | 1 /* ExportValue */
-                            : 4 /* ExportNamespace */;
-                    case 235 /* ClassDeclaration */:
-                    case 238 /* EnumDeclaration */:
-                        return 2 /* ExportType */ | 1 /* ExportValue */;
-                    case 274 /* SourceFile */:
-                        return 2 /* ExportType */ | 1 /* ExportValue */ | 4 /* ExportNamespace */;
-                    case 249 /* ExportAssignment */:
-                        // Export assigned entity name expressions act as aliases and should fall through, otherwise they export values
+                    case 236:
+                    case 237:
+                    case 297:
+                    case 292:
+                        return 2;
+                    case 239:
+                        return ts.isAmbientModule(d) || ts.getModuleInstanceState(d) !== 0
+                            ? 4 | 1
+                            : 4;
+                    case 235:
+                    case 238:
+                        return 2 | 1;
+                    case 274:
+                        return 2 | 1 | 4;
+                    case 249:
                         if (!ts.isEntityNameExpression(d.expression)) {
-                            return 1 /* ExportValue */;
+                            return 1;
                         }
                         d = d.expression;
-                    /* falls through */
-                    // The below options all declare an Alias, which is allowed to merge with other values within the importing module
-                    case 243 /* ImportEqualsDeclaration */:
-                    case 246 /* NamespaceImport */:
-                    case 245 /* ImportClause */:
-                        var result_2 = 0 /* None */;
+                    case 243:
+                    case 246:
+                    case 245:
+                        var result_3 = 0;
                         var target = resolveAlias(getSymbolOfNode(d));
-                        ts.forEach(target.declarations, function (d) { result_2 |= getDeclarationSpaces(d); });
-                        return result_2;
-                    case 232 /* VariableDeclaration */:
-                    case 182 /* BindingElement */:
-                    case 234 /* FunctionDeclaration */:
-                    case 248 /* ImportSpecifier */: // https://github.com/Microsoft/TypeScript/pull/7591
-                        return 1 /* ExportValue */;
+                        ts.forEach(target.declarations, function (d) { result_3 |= getDeclarationSpaces(d); });
+                        return result_3;
+                    case 232:
+                    case 182:
+                    case 234:
+                    case 248:
+                        return 1;
                     default:
                         return ts.Debug.fail(ts.Debug.showSyntaxKind(d));
                 }
@@ -49183,21 +40779,7 @@ var ts;
             var promisedType = getPromisedTypeOfPromise(type, errorNode);
             return promisedType && getAwaitedType(promisedType, errorNode, diagnosticMessage);
         }
-        /**
-         * Gets the "promised type" of a promise.
-         * @param type The type of the promise.
-         * @remarks The "promised type" of a type is the type of the "value" parameter of the "onfulfilled" callback.
-         */
         function getPromisedTypeOfPromise(promise, errorNode) {
-            //
-            //  { // promise
-            //      then( // thenFunction
-            //          onfulfilled: ( // onfulfilledParameterType
-            //              value: T // valueParameterType
-            //          ) => any
-            //      ): any;
-            //  }
-            //
             if (isTypeAny(promise)) {
                 return undefined;
             }
@@ -49205,40 +40787,33 @@ var ts;
             if (typeAsPromise.promisedTypeOfPromise) {
                 return typeAsPromise.promisedTypeOfPromise;
             }
-            if (isReferenceToType(promise, getGlobalPromiseType(/*reportErrors*/ false))) {
+            if (isReferenceToType(promise, getGlobalPromiseType(false))) {
                 return typeAsPromise.promisedTypeOfPromise = promise.typeArguments[0];
             }
-            var thenFunction = getTypeOfPropertyOfType(promise, "then"); // TODO: GH#18217
+            var thenFunction = getTypeOfPropertyOfType(promise, "then");
             if (isTypeAny(thenFunction)) {
                 return undefined;
             }
-            var thenSignatures = thenFunction ? getSignaturesOfType(thenFunction, 0 /* Call */) : ts.emptyArray;
+            var thenSignatures = thenFunction ? getSignaturesOfType(thenFunction, 0) : ts.emptyArray;
             if (thenSignatures.length === 0) {
                 if (errorNode) {
                     error(errorNode, ts.Diagnostics.A_promise_must_have_a_then_method);
                 }
                 return undefined;
             }
-            var onfulfilledParameterType = getTypeWithFacts(getUnionType(ts.map(thenSignatures, getTypeOfFirstParameterOfSignature)), 524288 /* NEUndefinedOrNull */);
+            var onfulfilledParameterType = getTypeWithFacts(getUnionType(ts.map(thenSignatures, getTypeOfFirstParameterOfSignature)), 524288);
             if (isTypeAny(onfulfilledParameterType)) {
                 return undefined;
             }
-            var onfulfilledParameterSignatures = getSignaturesOfType(onfulfilledParameterType, 0 /* Call */);
+            var onfulfilledParameterSignatures = getSignaturesOfType(onfulfilledParameterType, 0);
             if (onfulfilledParameterSignatures.length === 0) {
                 if (errorNode) {
                     error(errorNode, ts.Diagnostics.The_first_parameter_of_the_then_method_of_a_promise_must_be_a_callback);
                 }
                 return undefined;
             }
-            return typeAsPromise.promisedTypeOfPromise = getUnionType(ts.map(onfulfilledParameterSignatures, getTypeOfFirstParameterOfSignature), 2 /* Subtype */);
+            return typeAsPromise.promisedTypeOfPromise = getUnionType(ts.map(onfulfilledParameterSignatures, getTypeOfFirstParameterOfSignature), 2);
         }
-        /**
-         * Gets the "awaited type" of a type.
-         * @param type The type to await.
-         * @remarks The "awaited type" of an expression is its "promised type" if the expression is a
-         * Promise-like type; otherwise, it is the type of the expression. This is used to reflect
-         * The runtime behavior of the `await` keyword.
-         */
         function checkAwaitedType(type, errorNode, diagnosticMessage) {
             return getAwaitedType(type, errorNode, diagnosticMessage) || errorType;
         }
@@ -49250,7 +40825,7 @@ var ts;
             if (isTypeAny(type)) {
                 return typeAsAwaitable.awaitedTypeOfType = type;
             }
-            if (type.flags & 262144 /* Union */) {
+            if (type.flags & 262144) {
                 var types = void 0;
                 for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
                     var constituentType = _a[_i];
@@ -49264,45 +40839,11 @@ var ts;
             var promisedType = getPromisedTypeOfPromise(type);
             if (promisedType) {
                 if (type.id === promisedType.id || awaitedTypeStack.indexOf(promisedType.id) >= 0) {
-                    // Verify that we don't have a bad actor in the form of a promise whose
-                    // promised type is the same as the promise type, or a mutually recursive
-                    // promise. If so, we return undefined as we cannot guess the shape. If this
-                    // were the actual case in the JavaScript, this Promise would never resolve.
-                    //
-                    // An example of a bad actor with a singly-recursive promise type might
-                    // be:
-                    //
-                    //  interface BadPromise {
-                    //      then(
-                    //          onfulfilled: (value: BadPromise) => any,
-                    //          onrejected: (error: any) => any): BadPromise;
-                    //  }
-                    // The above interface will pass the PromiseLike check, and return a
-                    // promised type of `BadPromise`. Since this is a self reference, we
-                    // don't want to keep recursing ad infinitum.
-                    //
-                    // An example of a bad actor in the form of a mutually-recursive
-                    // promise type might be:
-                    //
-                    //  interface BadPromiseA {
-                    //      then(
-                    //          onfulfilled: (value: BadPromiseB) => any,
-                    //          onrejected: (error: any) => any): BadPromiseB;
-                    //  }
-                    //
-                    //  interface BadPromiseB {
-                    //      then(
-                    //          onfulfilled: (value: BadPromiseA) => any,
-                    //          onrejected: (error: any) => any): BadPromiseA;
-                    //  }
-                    //
                     if (errorNode) {
                         error(errorNode, ts.Diagnostics.Type_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method);
                     }
                     return undefined;
                 }
-                // Keep track of the type we're about to unwrap to avoid bad recursive promise types.
-                // See the comments above for more information.
                 awaitedTypeStack.push(type.id);
                 var awaitedType = getAwaitedType(promisedType, errorNode, diagnosticMessage);
                 awaitedTypeStack.pop();
@@ -49311,23 +40852,8 @@ var ts;
                 }
                 return typeAsAwaitable.awaitedTypeOfType = awaitedType;
             }
-            // The type was not a promise, so it could not be unwrapped any further.
-            // As long as the type does not have a callable "then" property, it is
-            // safe to return the type; otherwise, an error will be reported in
-            // the call to getNonThenableType and we will return undefined.
-            //
-            // An example of a non-promise "thenable" might be:
-            //
-            //  await { then(): void {} }
-            //
-            // The "thenable" does not match the minimal definition for a promise. When
-            // a Promise/A+-compatible or ES6 promise tries to adopt this value, the promise
-            // will never settle. We treat this as an error to help flag an early indicator
-            // of a runtime problem. If the user wants to return this value from an async
-            // function, they would need to wrap it in some other value. If they want it to
-            // be treated as a promise, they can cast to <any>.
             var thenFunction = getTypeOfPropertyOfType(type, "then");
-            if (thenFunction && getSignaturesOfType(thenFunction, 0 /* Call */).length > 0) {
+            if (thenFunction && getSignaturesOfType(thenFunction, 0).length > 0) {
                 if (errorNode) {
                     if (!diagnosticMessage)
                         return ts.Debug.fail();
@@ -49337,60 +40863,20 @@ var ts;
             }
             return typeAsAwaitable.awaitedTypeOfType = type;
         }
-        /**
-         * Checks the return type of an async function to ensure it is a compatible
-         * Promise implementation.
-         *
-         * This checks that an async function has a valid Promise-compatible return type,
-         * and returns the *awaited type* of the promise. An async function has a valid
-         * Promise-compatible return type if the resolved value of the return type has a
-         * construct signature that takes in an `initializer` function that in turn supplies
-         * a `resolve` function as one of its arguments and results in an object with a
-         * callable `then` signature.
-         *
-         * @param node The signature to check
-         */
         function checkAsyncFunctionReturnType(node) {
-            // As part of our emit for an async function, we will need to emit the entity name of
-            // the return type annotation as an expression. To meet the necessary runtime semantics
-            // for __awaiter, we must also check that the type of the declaration (e.g. the static
-            // side or "constructor" of the promise type) is compatible `PromiseConstructorLike`.
-            //
-            // An example might be (from lib.es6.d.ts):
-            //
-            //  interface Promise<T> { ... }
-            //  interface PromiseConstructor {
-            //      new <T>(...): Promise<T>;
-            //  }
-            //  declare var Promise: PromiseConstructor;
-            //
-            // When an async function declares a return type annotation of `Promise<T>`, we
-            // need to get the type of the `Promise` variable declaration above, which would
-            // be `PromiseConstructor`.
-            //
-            // The same case applies to a class:
-            //
-            //  declare class Promise<T> {
-            //      constructor(...);
-            //      then<U>(...): Promise<U>;
-            //  }
-            //
-            var returnTypeNode = ts.getEffectiveReturnTypeNode(node); // TODO: GH#18217
+            var returnTypeNode = ts.getEffectiveReturnTypeNode(node);
             var returnType = getTypeFromTypeNode(returnTypeNode);
-            if (languageVersion >= 2 /* ES2015 */) {
+            if (languageVersion >= 2) {
                 if (returnType === errorType) {
                     return errorType;
                 }
-                var globalPromiseType = getGlobalPromiseType(/*reportErrors*/ true);
+                var globalPromiseType = getGlobalPromiseType(true);
                 if (globalPromiseType !== emptyGenericType && !isReferenceToType(returnType, globalPromiseType)) {
-                    // The promise type was not a valid type reference to the global promise type, so we
-                    // report an error and return the unknown type.
                     error(returnTypeNode, ts.Diagnostics.The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type);
                     return errorType;
                 }
             }
             else {
-                // Always mark the type node as referenced if it points to a value
                 markTypeNodeAsReferenced(returnTypeNode);
                 if (returnType === errorType) {
                     return errorType;
@@ -49400,10 +40886,10 @@ var ts;
                     error(returnTypeNode, ts.Diagnostics.Type_0_is_not_a_valid_async_function_return_type_in_ES5_SlashES3_because_it_does_not_refer_to_a_Promise_compatible_constructor_value, typeToString(returnType));
                     return errorType;
                 }
-                var promiseConstructorSymbol = resolveEntityName(promiseConstructorName, 67216319 /* Value */, /*ignoreErrors*/ true);
+                var promiseConstructorSymbol = resolveEntityName(promiseConstructorName, 67216319, true);
                 var promiseConstructorType = promiseConstructorSymbol ? getTypeOfSymbol(promiseConstructorSymbol) : errorType;
                 if (promiseConstructorType === errorType) {
-                    if (promiseConstructorName.kind === 71 /* Identifier */ && promiseConstructorName.escapedText === "Promise" && getTargetType(returnType) === getGlobalPromiseType(/*reportErrors*/ false)) {
+                    if (promiseConstructorName.kind === 71 && promiseConstructorName.escapedText === "Promise" && getTargetType(returnType) === getGlobalPromiseType(false)) {
                         error(returnTypeNode, ts.Diagnostics.An_async_function_or_method_in_ES5_SlashES3_requires_the_Promise_constructor_Make_sure_you_have_a_declaration_for_the_Promise_constructor_or_include_ES2015_in_your_lib_option);
                     }
                     else {
@@ -49411,57 +40897,50 @@ var ts;
                     }
                     return errorType;
                 }
-                var globalPromiseConstructorLikeType = getGlobalPromiseConstructorLikeType(/*reportErrors*/ true);
+                var globalPromiseConstructorLikeType = getGlobalPromiseConstructorLikeType(true);
                 if (globalPromiseConstructorLikeType === emptyObjectType) {
-                    // If we couldn't resolve the global PromiseConstructorLike type we cannot verify
-                    // compatibility with __awaiter.
                     error(returnTypeNode, ts.Diagnostics.Type_0_is_not_a_valid_async_function_return_type_in_ES5_SlashES3_because_it_does_not_refer_to_a_Promise_compatible_constructor_value, ts.entityNameToString(promiseConstructorName));
                     return errorType;
                 }
                 if (!checkTypeAssignableTo(promiseConstructorType, globalPromiseConstructorLikeType, returnTypeNode, ts.Diagnostics.Type_0_is_not_a_valid_async_function_return_type_in_ES5_SlashES3_because_it_does_not_refer_to_a_Promise_compatible_constructor_value)) {
                     return errorType;
                 }
-                // Verify there is no local declaration that could collide with the promise constructor.
                 var rootName = promiseConstructorName && getFirstIdentifier(promiseConstructorName);
-                var collidingSymbol = getSymbol(node.locals, rootName.escapedText, 67216319 /* Value */);
+                var collidingSymbol = getSymbol(node.locals, rootName.escapedText, 67216319);
                 if (collidingSymbol) {
                     error(collidingSymbol.valueDeclaration, ts.Diagnostics.Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions, ts.idText(rootName), ts.entityNameToString(promiseConstructorName));
                     return errorType;
                 }
             }
-            // Get and return the awaited type of the return type.
             return checkAwaitedType(returnType, node, ts.Diagnostics.The_return_type_of_an_async_function_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member);
         }
-        /** Check a decorator */
         function checkDecorator(node) {
             var signature = getResolvedSignature(node);
             var returnType = getReturnTypeOfSignature(signature);
-            if (returnType.flags & 1 /* Any */) {
+            if (returnType.flags & 1) {
                 return;
             }
             var expectedReturnType;
             var headMessage = getDiagnosticHeadMessageForDecoratorResolution(node);
             var errorInfo;
             switch (node.parent.kind) {
-                case 235 /* ClassDeclaration */:
+                case 235:
                     var classSymbol = getSymbolOfNode(node.parent);
                     var classConstructorType = getTypeOfSymbol(classSymbol);
                     expectedReturnType = getUnionType([classConstructorType, voidType]);
                     break;
-                case 149 /* Parameter */:
+                case 149:
                     expectedReturnType = voidType;
-                    errorInfo = ts.chainDiagnosticMessages(
-                    /*details*/ undefined, ts.Diagnostics.The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any);
+                    errorInfo = ts.chainDiagnosticMessages(undefined, ts.Diagnostics.The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any);
                     break;
-                case 152 /* PropertyDeclaration */:
+                case 152:
                     expectedReturnType = voidType;
-                    errorInfo = ts.chainDiagnosticMessages(
-                    /*details*/ undefined, ts.Diagnostics.The_return_type_of_a_property_decorator_function_must_be_either_void_or_any);
+                    errorInfo = ts.chainDiagnosticMessages(undefined, ts.Diagnostics.The_return_type_of_a_property_decorator_function_must_be_either_void_or_any);
                     break;
-                case 154 /* MethodDeclaration */:
-                case 156 /* GetAccessor */:
-                case 157 /* SetAccessor */:
-                    var methodType = getTypeOfNode(node.parent); // TODO: GH#18217
+                case 154:
+                case 156:
+                case 157:
+                    var methodType = getTypeOfNode(node.parent);
                     var descriptorType = createTypedPropertyDescriptorType(methodType);
                     expectedReturnType = getUnionType([descriptorType, voidType]);
                     break;
@@ -49470,10 +40949,6 @@ var ts;
             }
             checkTypeAssignableTo(returnType, expectedReturnType, node, headMessage, function () { return errorInfo; });
         }
-        /**
-         * If a TypeNode can be resolved to a value symbol imported from an external module, it is
-         * marked as referenced to prevent import elision.
-         */
         function markTypeNodeAsReferenced(node) {
             markEntityNameOrEntityExpressionAsReference(node && ts.getEntityNameFromTypeNode(node));
         }
@@ -49481,22 +40956,15 @@ var ts;
             if (!typeName)
                 return;
             var rootName = getFirstIdentifier(typeName);
-            var meaning = (typeName.kind === 71 /* Identifier */ ? 67901928 /* Type */ : 1920 /* Namespace */) | 2097152 /* Alias */;
-            var rootSymbol = resolveName(rootName, rootName.escapedText, meaning, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined, /*isRefernce*/ true);
+            var meaning = (typeName.kind === 71 ? 67901928 : 1920) | 2097152;
+            var rootSymbol = resolveName(rootName, rootName.escapedText, meaning, undefined, undefined, true);
             if (rootSymbol
-                && rootSymbol.flags & 2097152 /* Alias */
+                && rootSymbol.flags & 2097152
                 && symbolIsValue(rootSymbol)
                 && !isConstEnumOrConstEnumOnlyModule(resolveAlias(rootSymbol))) {
                 markAliasSymbolAsReferenced(rootSymbol);
             }
         }
-        /**
-         * This function marks the type used for metadata decorator as referenced if it is import
-         * from external module.
-         * This is different from markTypeNodeAsReferenced because it tries to simplify type nodes in
-         * union and intersection type
-         * @param node
-         */
         function markDecoratorMedataDataTypeNodeAsReferenced(node) {
             var entityName = getEntityNameForDecoratorMetadata(node);
             if (entityName && ts.isEntityName(entityName)) {
@@ -49506,32 +40974,25 @@ var ts;
         function getEntityNameForDecoratorMetadata(node) {
             if (node) {
                 switch (node.kind) {
-                    case 170 /* IntersectionType */:
-                    case 169 /* UnionType */:
+                    case 170:
+                    case 169:
                         var commonEntityName = void 0;
                         for (var _i = 0, _a = node.types; _i < _a.length; _i++) {
                             var typeNode = _a[_i];
-                            while (typeNode.kind === 173 /* ParenthesizedType */) {
-                                typeNode = typeNode.type; // Skip parens if need be
+                            while (typeNode.kind === 173) {
+                                typeNode = typeNode.type;
                             }
-                            if (typeNode.kind === 131 /* NeverKeyword */) {
-                                continue; // Always elide `never` from the union/intersection if possible
+                            if (typeNode.kind === 131) {
+                                continue;
                             }
-                            if (!strictNullChecks && (typeNode.kind === 95 /* NullKeyword */ || typeNode.kind === 140 /* UndefinedKeyword */)) {
-                                continue; // Elide null and undefined from unions for metadata, just like what we did prior to the implementation of strict null checks
+                            if (!strictNullChecks && (typeNode.kind === 95 || typeNode.kind === 140)) {
+                                continue;
                             }
                             var individualEntityName = getEntityNameForDecoratorMetadata(typeNode);
                             if (!individualEntityName) {
-                                // Individual is something like string number
-                                // So it would be serialized to either that type or object
-                                // Safe to return here
                                 return undefined;
                             }
                             if (commonEntityName) {
-                                // Note this is in sync with the transformation that happens for type node.
-                                // Keep this in sync with serializeUnionOrIntersectionType
-                                // Verify if they refer to same entity and is identifier
-                                // return undefined if they dont match because we would emit object
                                 if (!ts.isIdentifier(commonEntityName) ||
                                     !ts.isIdentifier(individualEntityName) ||
                                     commonEntityName.escapedText !== individualEntityName.escapedText) {
@@ -49543,9 +41004,9 @@ var ts;
                             }
                         }
                         return commonEntityName;
-                    case 173 /* ParenthesizedType */:
+                    case 173:
                         return getEntityNameForDecoratorMetadata(node.type);
-                    case 162 /* TypeReference */:
+                    case 162:
                         return node.typeName;
                 }
             }
@@ -49554,13 +41015,10 @@ var ts;
             var typeNode = ts.getEffectiveTypeAnnotationNode(node);
             return ts.isRestParameter(node) ? ts.getRestParameterElementType(typeNode) : typeNode;
         }
-        /** Check the decorators of a node */
         function checkDecorators(node) {
             if (!node.decorators) {
                 return;
             }
-            // skip this check for nodes that cannot have decorators. These should have already had an error reported by
-            // checkGrammarDecorators.
             if (!ts.nodeCanBeDecorated(node, node.parent, node.parent.parent)) {
                 return;
             }
@@ -49568,15 +41026,14 @@ var ts;
                 error(node, ts.Diagnostics.Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning);
             }
             var firstDecorator = node.decorators[0];
-            checkExternalEmitHelpers(firstDecorator, 8 /* Decorate */);
-            if (node.kind === 149 /* Parameter */) {
-                checkExternalEmitHelpers(firstDecorator, 32 /* Param */);
+            checkExternalEmitHelpers(firstDecorator, 8);
+            if (node.kind === 149) {
+                checkExternalEmitHelpers(firstDecorator, 32);
             }
             if (compilerOptions.emitDecoratorMetadata) {
-                checkExternalEmitHelpers(firstDecorator, 16 /* Metadata */);
-                // we only need to perform these checks if we are emitting serialized type metadata for the target of a decorator.
+                checkExternalEmitHelpers(firstDecorator, 16);
                 switch (node.kind) {
-                    case 235 /* ClassDeclaration */:
+                    case 235:
                         var constructor = ts.getFirstConstructorWithBody(node);
                         if (constructor) {
                             for (var _i = 0, _a = constructor.parameters; _i < _a.length; _i++) {
@@ -49585,19 +41042,19 @@ var ts;
                             }
                         }
                         break;
-                    case 154 /* MethodDeclaration */:
-                    case 156 /* GetAccessor */:
-                    case 157 /* SetAccessor */:
+                    case 154:
+                    case 156:
+                    case 157:
                         for (var _b = 0, _c = node.parameters; _b < _c.length; _b++) {
                             var parameter = _c[_b];
                             markDecoratorMedataDataTypeNodeAsReferenced(getParameterTypeNodeForDecoratorCheck(parameter));
                         }
                         markDecoratorMedataDataTypeNodeAsReferenced(ts.getEffectiveReturnTypeNode(node));
                         break;
-                    case 152 /* PropertyDeclaration */:
+                    case 152:
                         markDecoratorMedataDataTypeNodeAsReferenced(ts.getEffectiveTypeAnnotationNode(node));
                         break;
-                    case 149 /* Parameter */:
+                    case 149:
                         markDecoratorMedataDataTypeNodeAsReferenced(getParameterTypeNodeForDecoratorCheck(node));
                         var containingSignature = node.parent;
                         for (var _d = 0, _e = containingSignature.parameters; _d < _e.length; _d++) {
@@ -49619,7 +41076,6 @@ var ts;
         }
         function checkJSDocTypeAliasTag(node) {
             if (!node.typeExpression) {
-                // If the node had `@property` tags, `typeExpression` would have been set to the first property tag.
                 error(node.name, ts.Diagnostics.JSDoc_typedef_tag_should_either_have_a_type_annotation_or_be_followed_by_property_or_member_tags);
             }
             if (node.name) {
@@ -49631,21 +41087,18 @@ var ts;
             checkSourceElement(node.typeExpression);
             if (!ts.getParameterSymbolFromJSDoc(node)) {
                 var decl = ts.getHostSignatureFromJSDoc(node);
-                // don't issue an error for invalid hosts -- just functions --
-                // and give a better error message when the host function mentions `arguments`
-                // but the tag doesn't have an array type
                 if (decl) {
                     var i = ts.getJSDocTags(decl).filter(ts.isJSDocParameterTag).indexOf(node);
                     if (i > -1 && i < decl.parameters.length && ts.isBindingPattern(decl.parameters[i].name)) {
                         return;
                     }
                     if (!containsArgumentsReference(decl)) {
-                        error(node.name, ts.Diagnostics.JSDoc_param_tag_has_name_0_but_there_is_no_parameter_with_that_name, ts.idText(node.name.kind === 146 /* QualifiedName */ ? node.name.right : node.name));
+                        error(node.name, ts.Diagnostics.JSDoc_param_tag_has_name_0_but_there_is_no_parameter_with_that_name, ts.idText(node.name.kind === 146 ? node.name.right : node.name));
                     }
                     else if (ts.findLast(ts.getJSDocTags(decl), ts.isJSDocParameterTag) === node &&
                         node.typeExpression && node.typeExpression.type &&
                         !isArrayType(getTypeFromTypeNode(node.typeExpression.type))) {
-                        error(node.name, ts.Diagnostics.JSDoc_param_tag_has_name_0_but_there_is_no_parameter_with_that_name_It_would_match_arguments_if_it_had_an_array_type, ts.idText(node.name.kind === 146 /* QualifiedName */ ? node.name.right : node.name));
+                        error(node.name, ts.Diagnostics.JSDoc_param_tag_has_name_0_but_there_is_no_parameter_with_that_name_It_would_match_arguments_if_it_had_an_array_type, ts.idText(node.name.kind === 146 ? node.name.right : node.name));
                     }
                 }
             }
@@ -49672,9 +41125,9 @@ var ts;
         }
         function getIdentifierFromEntityNameExpression(node) {
             switch (node.kind) {
-                case 71 /* Identifier */:
+                case 71:
                     return node;
-                case 185 /* PropertyAccessExpression */:
+                case 185:
                     return node.name;
                 default:
                     return undefined;
@@ -49684,63 +41137,41 @@ var ts;
             checkDecorators(node);
             checkSignatureDeclaration(node);
             var functionFlags = ts.getFunctionFlags(node);
-            // Do not use hasDynamicName here, because that returns false for well known symbols.
-            // We want to perform checkComputedPropertyName for all computed properties, including
-            // well known symbols.
-            if (node.name && node.name.kind === 147 /* ComputedPropertyName */) {
-                // This check will account for methods in class/interface declarations,
-                // as well as accessors in classes/object literals
+            if (node.name && node.name.kind === 147) {
                 checkComputedPropertyName(node.name);
             }
             if (!hasNonBindableDynamicName(node)) {
-                // first we want to check the local symbol that contain this declaration
-                // - if node.localSymbol !== undefined - this is current declaration is exported and localSymbol points to the local symbol
-                // - if node.localSymbol === undefined - this node is non-exported so we can just pick the result of getSymbolOfNode
                 var symbol = getSymbolOfNode(node);
                 var localSymbol = node.localSymbol || symbol;
-                // Since the javascript won't do semantic analysis like typescript,
-                // if the javascript file comes before the typescript file and both contain same name functions,
-                // checkFunctionOrConstructorSymbol wouldn't be called if we didnt ignore javascript function.
-                var firstDeclaration = ts.find(localSymbol.declarations, 
-                // Get first non javascript function declaration
-                function (declaration) { return declaration.kind === node.kind && !(declaration.flags & 65536 /* JavaScriptFile */); });
-                // Only type check the symbol once
+                var firstDeclaration = ts.find(localSymbol.declarations, function (declaration) { return declaration.kind === node.kind && !(declaration.flags & 65536); });
                 if (node === firstDeclaration) {
                     checkFunctionOrConstructorSymbol(localSymbol);
                 }
                 if (symbol.parent) {
-                    // run check once for the first declaration
                     if (ts.getDeclarationOfKind(symbol, node.kind) === node) {
-                        // run check on export symbol to check that modifiers agree across all exported declarations
                         checkFunctionOrConstructorSymbol(symbol);
                     }
                 }
             }
-            var body = node.kind === 153 /* MethodSignature */ ? undefined : node.body;
+            var body = node.kind === 153 ? undefined : node.body;
             checkSourceElement(body);
             var returnTypeNode = ts.getEffectiveReturnTypeNode(node);
-            if ((functionFlags & 1 /* Generator */) === 0) { // Async function or normal function
-                var returnOrPromisedType = returnTypeNode && (functionFlags & 2 /* Async */
-                    ? checkAsyncFunctionReturnType(node) // Async function
-                    : getTypeFromTypeNode(returnTypeNode)); // normal function
+            if ((functionFlags & 1) === 0) {
+                var returnOrPromisedType = returnTypeNode && (functionFlags & 2
+                    ? checkAsyncFunctionReturnType(node)
+                    : getTypeFromTypeNode(returnTypeNode));
                 checkAllCodePathsInNonVoidFunctionReturnOrThrow(node, returnOrPromisedType);
             }
             if (produceDiagnostics && !returnTypeNode) {
-                // Report an implicit any error if there is no body, no explicit return type, and node is not a private method
-                // in an ambient context
                 if (noImplicitAny && ts.nodeIsMissing(body) && !isPrivateWithinAmbient(node)) {
                     reportImplicitAnyError(node, anyType);
                 }
-                if (functionFlags & 1 /* Generator */ && ts.nodeIsPresent(body)) {
-                    // A generator with a body and no type annotation can still cause errors. It can error if the
-                    // yielded values have no common supertype, or it can give an implicit any error if it has no
-                    // yielded values. The only way to trigger these errors is to try checking its return type.
+                if (functionFlags & 1 && ts.nodeIsPresent(body)) {
                     getReturnTypeOfSignature(getSignatureFromDeclaration(node));
                 }
             }
         }
         function registerForUnusedIdentifiersCheck(node) {
-            // May be in a call such as getTypeOfNode that happened to call this. But potentiallyUnusedIdentifiers is only defined in the scope of `checkSourceFile`.
             if (produceDiagnostics) {
                 var sourceFile = ts.getSourceFileOfNode(node);
                 var potentiallyUnusedIdentifiers = allPotentiallyUnusedIdentifiers.get(sourceFile.path);
@@ -49748,8 +41179,6 @@ var ts;
                     potentiallyUnusedIdentifiers = [];
                     allPotentiallyUnusedIdentifiers.set(sourceFile.path, potentiallyUnusedIdentifiers);
                 }
-                // TODO: GH#22580
-                // Debug.assert(addToSeen(seenPotentiallyUnusedIdentifiers, getNodeId(node)), "Adding potentially-unused identifier twice");
                 potentiallyUnusedIdentifiers.push(node);
             }
         }
@@ -49757,41 +41186,41 @@ var ts;
             for (var _i = 0, potentiallyUnusedIdentifiers_1 = potentiallyUnusedIdentifiers; _i < potentiallyUnusedIdentifiers_1.length; _i++) {
                 var node = potentiallyUnusedIdentifiers_1[_i];
                 switch (node.kind) {
-                    case 235 /* ClassDeclaration */:
-                    case 205 /* ClassExpression */:
+                    case 235:
+                    case 205:
                         checkUnusedClassMembers(node, addDiagnostic);
                         checkUnusedTypeParameters(node, addDiagnostic);
                         break;
-                    case 236 /* InterfaceDeclaration */:
+                    case 236:
                         checkUnusedTypeParameters(node, addDiagnostic);
                         break;
-                    case 274 /* SourceFile */:
-                    case 239 /* ModuleDeclaration */:
-                    case 213 /* Block */:
-                    case 241 /* CaseBlock */:
-                    case 220 /* ForStatement */:
-                    case 221 /* ForInStatement */:
-                    case 222 /* ForOfStatement */:
+                    case 274:
+                    case 239:
+                    case 213:
+                    case 241:
+                    case 220:
+                    case 221:
+                    case 222:
                         checkUnusedLocalsAndParameters(node, addDiagnostic);
                         break;
-                    case 155 /* Constructor */:
-                    case 192 /* FunctionExpression */:
-                    case 234 /* FunctionDeclaration */:
-                    case 193 /* ArrowFunction */:
-                    case 154 /* MethodDeclaration */:
-                    case 156 /* GetAccessor */:
-                    case 157 /* SetAccessor */:
+                    case 155:
+                    case 192:
+                    case 234:
+                    case 193:
+                    case 154:
+                    case 156:
+                    case 157:
                         if (node.body) {
                             checkUnusedLocalsAndParameters(node, addDiagnostic);
                         }
                         checkUnusedTypeParameters(node, addDiagnostic);
                         break;
-                    case 153 /* MethodSignature */:
-                    case 158 /* CallSignature */:
-                    case 159 /* ConstructSignature */:
-                    case 163 /* FunctionType */:
-                    case 164 /* ConstructorType */:
-                    case 237 /* TypeAliasDeclaration */:
+                    case 153:
+                    case 158:
+                    case 159:
+                    case 163:
+                    case 164:
+                    case 237:
                         checkUnusedTypeParameters(node, addDiagnostic);
                         break;
                     default:
@@ -49802,43 +41231,41 @@ var ts;
         function errorUnusedLocal(declaration, name, addDiagnostic) {
             var node = ts.getNameOfDeclaration(declaration) || declaration;
             var message = isTypeDeclaration(declaration) ? ts.Diagnostics._0_is_declared_but_never_used : ts.Diagnostics._0_is_declared_but_its_value_is_never_read;
-            addDiagnostic(0 /* Local */, ts.createDiagnosticForNode(node, message, name));
+            addDiagnostic(0, ts.createDiagnosticForNode(node, message, name));
         }
         function parameterNameStartsWithUnderscore(parameterName) {
             return parameterName && isIdentifierThatStartsWithUnderScore(parameterName);
         }
         function isIdentifierThatStartsWithUnderScore(node) {
-            return ts.isIdentifier(node) && ts.idText(node).charCodeAt(0) === 95 /* _ */;
+            return ts.isIdentifier(node) && ts.idText(node).charCodeAt(0) === 95;
         }
         function checkUnusedClassMembers(node, addDiagnostic) {
-            if (!(node.flags & 4194304 /* Ambient */)) {
+            if (!(node.flags & 4194304)) {
                 for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
                     var member = _a[_i];
                     switch (member.kind) {
-                        case 154 /* MethodDeclaration */:
-                        case 152 /* PropertyDeclaration */:
-                        case 156 /* GetAccessor */:
-                        case 157 /* SetAccessor */:
-                            if (member.kind === 157 /* SetAccessor */ && member.symbol.flags & 32768 /* GetAccessor */) {
-                                // Already would have reported an error on the getter.
+                        case 154:
+                        case 152:
+                        case 156:
+                        case 157:
+                            if (member.kind === 157 && member.symbol.flags & 32768) {
                                 break;
                             }
                             var symbol = getSymbolOfNode(member);
-                            if (!symbol.isReferenced && ts.hasModifier(member, 8 /* Private */)) {
-                                addDiagnostic(0 /* Local */, ts.createDiagnosticForNode(member.name, ts.Diagnostics._0_is_declared_but_its_value_is_never_read, symbolToString(symbol)));
+                            if (!symbol.isReferenced && ts.hasModifier(member, 8)) {
+                                addDiagnostic(0, ts.createDiagnosticForNode(member.name, ts.Diagnostics._0_is_declared_but_its_value_is_never_read, symbolToString(symbol)));
                             }
                             break;
-                        case 155 /* Constructor */:
+                        case 155:
                             for (var _b = 0, _c = member.parameters; _b < _c.length; _b++) {
                                 var parameter = _c[_b];
-                                if (!parameter.symbol.isReferenced && ts.hasModifier(parameter, 8 /* Private */)) {
-                                    addDiagnostic(0 /* Local */, ts.createDiagnosticForNode(parameter.name, ts.Diagnostics.Property_0_is_declared_but_its_value_is_never_read, ts.symbolName(parameter.symbol)));
+                                if (!parameter.symbol.isReferenced && ts.hasModifier(parameter, 8)) {
+                                    addDiagnostic(0, ts.createDiagnosticForNode(parameter.name, ts.Diagnostics.Property_0_is_declared_but_its_value_is_never_read, ts.symbolName(parameter.symbol)));
                                 }
                             }
                             break;
-                        case 160 /* IndexSignature */:
-                        case 212 /* SemicolonClassElement */:
-                            // Can't be private
+                        case 160:
+                        case 212:
                             break;
                         default:
                             ts.Debug.fail();
@@ -49847,14 +41274,12 @@ var ts;
             }
         }
         function checkUnusedTypeParameters(node, addDiagnostic) {
-            // Only report errors on the last declaration for the type parameter container;
-            // this ensures that all uses have been accounted for.
             var typeParameters = ts.getEffectiveTypeParameterDeclarations(node);
-            if (!(node.flags & 4194304 /* Ambient */) && ts.last(getSymbolOfNode(node).declarations) === node) {
+            if (!(node.flags & 4194304) && ts.last(getSymbolOfNode(node).declarations) === node) {
                 for (var _i = 0, typeParameters_2 = typeParameters; _i < typeParameters_2.length; _i++) {
                     var typeParameter = typeParameters_2[_i];
-                    if (!(getMergedSymbol(typeParameter.symbol).isReferenced & 262144 /* TypeParameter */) && !isIdentifierThatStartsWithUnderScore(typeParameter.name)) {
-                        addDiagnostic(1 /* Parameter */, ts.createDiagnosticForNode(typeParameter.name, ts.Diagnostics._0_is_declared_but_its_value_is_never_read, ts.symbolName(typeParameter.symbol)));
+                    if (!(getMergedSymbol(typeParameter.symbol).isReferenced & 262144) && !isIdentifierThatStartsWithUnderScore(typeParameter.name)) {
+                        addDiagnostic(1, ts.createDiagnosticForNode(typeParameter.name, ts.Diagnostics._0_is_declared_but_its_value_is_never_read, ts.symbolName(typeParameter.symbol)));
                     }
                 }
             }
@@ -49873,16 +41298,13 @@ var ts;
             return ts.tryCast(ts.getRootDeclaration(node), ts.isParameter);
         }
         function checkUnusedLocalsAndParameters(nodeWithLocals, addDiagnostic) {
-            if (nodeWithLocals.flags & 4194304 /* Ambient */)
+            if (nodeWithLocals.flags & 4194304)
                 return;
-            // Ideally we could use the ImportClause directly as a key, but must wait until we have full ES6 maps. So must store key along with value.
             var unusedImports = ts.createMap();
             var unusedDestructures = ts.createMap();
             var unusedVariables = ts.createMap();
             nodeWithLocals.locals.forEach(function (local) {
-                // If it's purely a type parameter, ignore, will be checked in `checkUnusedTypeParameters`.
-                // If it's a type parameter merged with a parameter, check if the parameter-side is used.
-                if (local.flags & 262144 /* TypeParameter */ ? !(local.flags & 3 /* Variable */ && !(local.isReferenced & 3 /* Variable */)) : local.isReferenced || local.exportSymbol) {
+                if (local.flags & 262144 ? !(local.flags & 3 && !(local.isReferenced & 3)) : local.isReferenced || local.exportSymbol) {
                     return;
                 }
                 for (var _i = 0, _a = local.declarations; _i < _a.length; _i++) {
@@ -49893,7 +41315,6 @@ var ts;
                         addToGroup(unusedImports, importClauseFromImported(declaration), declaration, getNodeId);
                     }
                     else if (ts.isBindingElement(declaration) && ts.isObjectBindingPattern(declaration.parent)) {
-                        // In `{ a, ...b }, `a` is considered used since it removes a property from `b`. `b` may still be unused though.
                         var lastElement = ts.last(declaration.parent.elements);
                         if (declaration === lastElement || !ts.last(declaration.parent.elements).dotDotDotToken) {
                             addToGroup(unusedDestructures, declaration.parent, declaration, getNodeId);
@@ -49909,7 +41330,7 @@ var ts;
                         if (parameter) {
                             var name = ts.getNameOfDeclaration(local.valueDeclaration);
                             if (!ts.isParameterPropertyDeclaration(parameter) && !ts.parameterIsThisKeyword(parameter) && !parameterNameStartsWithUnderscore(name)) {
-                                addDiagnostic(1 /* Parameter */, ts.createDiagnosticForNode(name, ts.Diagnostics._0_is_declared_but_its_value_is_never_read, ts.symbolName(local)));
+                                addDiagnostic(1, ts.createDiagnosticForNode(name, ts.Diagnostics._0_is_declared_but_its_value_is_never_read, ts.symbolName(local)));
                             }
                         }
                         else {
@@ -49923,10 +41344,10 @@ var ts;
                 var importDecl = importClause.parent;
                 var nDeclarations = (importClause.name ? 1 : 0) +
                     (importClause.namedBindings ?
-                        (importClause.namedBindings.kind === 246 /* NamespaceImport */ ? 1 : importClause.namedBindings.elements.length)
+                        (importClause.namedBindings.kind === 246 ? 1 : importClause.namedBindings.elements.length)
                         : 0);
                 if (nDeclarations === unuseds.length) {
-                    addDiagnostic(0 /* Local */, unuseds.length === 1
+                    addDiagnostic(0, unuseds.length === 1
                         ? ts.createDiagnosticForNode(importDecl, ts.Diagnostics._0_is_declared_but_its_value_is_never_read, ts.idText(ts.first(unuseds).name))
                         : ts.createDiagnosticForNode(importDecl, ts.Diagnostics.All_imports_in_import_declaration_are_unused));
                 }
@@ -49939,9 +41360,9 @@ var ts;
             });
             unusedDestructures.forEach(function (_a) {
                 var bindingPattern = _a[0], bindingElements = _a[1];
-                var kind = tryGetRootParameterDeclaration(bindingPattern.parent) ? 1 /* Parameter */ : 0 /* Local */;
+                var kind = tryGetRootParameterDeclaration(bindingPattern.parent) ? 1 : 0;
                 if (bindingPattern.elements.length === bindingElements.length) {
-                    if (bindingElements.length === 1 && bindingPattern.parent.kind === 232 /* VariableDeclaration */ && bindingPattern.parent.parent.kind === 233 /* VariableDeclarationList */) {
+                    if (bindingElements.length === 1 && bindingPattern.parent.kind === 232 && bindingPattern.parent.parent.kind === 233) {
                         addToGroup(unusedVariables, bindingPattern.parent.parent, bindingPattern.parent, getNodeId);
                     }
                     else {
@@ -49960,38 +41381,37 @@ var ts;
             unusedVariables.forEach(function (_a) {
                 var declarationList = _a[0], declarations = _a[1];
                 if (declarationList.declarations.length === declarations.length) {
-                    addDiagnostic(0 /* Local */, declarations.length === 1
+                    addDiagnostic(0, declarations.length === 1
                         ? ts.createDiagnosticForNode(ts.first(declarations).name, ts.Diagnostics._0_is_declared_but_its_value_is_never_read, bindingNameText(ts.first(declarations).name))
-                        : ts.createDiagnosticForNode(declarationList.parent.kind === 214 /* VariableStatement */ ? declarationList.parent : declarationList, ts.Diagnostics.All_variables_are_unused));
+                        : ts.createDiagnosticForNode(declarationList.parent.kind === 214 ? declarationList.parent : declarationList, ts.Diagnostics.All_variables_are_unused));
                 }
                 else {
-                    for (var _i = 0, declarations_4 = declarations; _i < declarations_4.length; _i++) {
-                        var decl = declarations_4[_i];
-                        addDiagnostic(0 /* Local */, ts.createDiagnosticForNode(decl, ts.Diagnostics._0_is_declared_but_its_value_is_never_read, ts.idText(ts.cast(decl.name, ts.isIdentifier))));
+                    for (var _i = 0, declarations_5 = declarations; _i < declarations_5.length; _i++) {
+                        var decl = declarations_5[_i];
+                        addDiagnostic(0, ts.createDiagnosticForNode(decl, ts.Diagnostics._0_is_declared_but_its_value_is_never_read, ts.idText(ts.cast(decl.name, ts.isIdentifier))));
                     }
                 }
             });
         }
         function bindingNameText(name) {
             switch (name.kind) {
-                case 71 /* Identifier */:
+                case 71:
                     return ts.idText(name);
-                case 181 /* ArrayBindingPattern */:
-                case 180 /* ObjectBindingPattern */:
+                case 181:
+                case 180:
                     return bindingNameText(ts.cast(ts.first(name.elements), ts.isBindingElement).name);
                 default:
                     return ts.Debug.assertNever(name);
             }
         }
         function isImportedDeclaration(node) {
-            return node.kind === 245 /* ImportClause */ || node.kind === 248 /* ImportSpecifier */ || node.kind === 246 /* NamespaceImport */;
+            return node.kind === 245 || node.kind === 248 || node.kind === 246;
         }
         function importClauseFromImported(decl) {
-            return decl.kind === 245 /* ImportClause */ ? decl : decl.kind === 246 /* NamespaceImport */ ? decl.parent : decl.parent.parent;
+            return decl.kind === 245 ? decl : decl.kind === 246 ? decl.parent : decl.parent.parent;
         }
         function checkBlock(node) {
-            // Grammar checking for SyntaxKind.Block
-            if (node.kind === 213 /* Block */) {
+            if (node.kind === 213) {
                 checkGrammarStatementInAmbientContext(node);
             }
             if (ts.isFunctionOrModuleBlock(node)) {
@@ -50007,8 +41427,7 @@ var ts;
             }
         }
         function checkCollisionWithArgumentsInGeneratedCode(node) {
-            // no rest parameters \ declaration context \ overload - no codegen impact
-            if (languageVersion >= 2 /* ES2015 */ || compilerOptions.noEmit || !ts.hasRestParameter(node) || node.flags & 4194304 /* Ambient */ || ts.nodeIsMissing(node.body)) {
+            if (languageVersion >= 2 || compilerOptions.noEmit || !ts.hasRestParameter(node) || node.flags & 4194304 || ts.nodeIsMissing(node.body)) {
                 return;
             }
             ts.forEach(node.parameters, function (p) {
@@ -50021,31 +41440,27 @@ var ts;
             if (!(identifier && identifier.escapedText === name)) {
                 return false;
             }
-            if (node.kind === 152 /* PropertyDeclaration */ ||
-                node.kind === 151 /* PropertySignature */ ||
-                node.kind === 154 /* MethodDeclaration */ ||
-                node.kind === 153 /* MethodSignature */ ||
-                node.kind === 156 /* GetAccessor */ ||
-                node.kind === 157 /* SetAccessor */) {
-                // it is ok to have member named '_super' or '_this' - member access is always qualified
+            if (node.kind === 152 ||
+                node.kind === 151 ||
+                node.kind === 154 ||
+                node.kind === 153 ||
+                node.kind === 156 ||
+                node.kind === 157) {
                 return false;
             }
-            if (node.flags & 4194304 /* Ambient */) {
-                // ambient context - no codegen impact
+            if (node.flags & 4194304) {
                 return false;
             }
             var root = ts.getRootDeclaration(node);
-            if (root.kind === 149 /* Parameter */ && ts.nodeIsMissing(root.parent.body)) {
-                // just an overload - no codegen impact
+            if (root.kind === 149 && ts.nodeIsMissing(root.parent.body)) {
                 return false;
             }
             return true;
         }
-        // this function will run after checking the source file so 'CaptureThis' is correct for all nodes
         function checkIfThisIsCapturedInEnclosingScope(node) {
             ts.findAncestor(node, function (current) {
-                if (getNodeCheckFlags(current) & 4 /* CaptureThis */) {
-                    var isDeclaration_1 = node.kind !== 71 /* Identifier */;
+                if (getNodeCheckFlags(current) & 4) {
+                    var isDeclaration_1 = node.kind !== 71;
                     if (isDeclaration_1) {
                         error(ts.getNameOfDeclaration(node), ts.Diagnostics.Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference);
                     }
@@ -50059,8 +41474,8 @@ var ts;
         }
         function checkIfNewTargetIsCapturedInEnclosingScope(node) {
             ts.findAncestor(node, function (current) {
-                if (getNodeCheckFlags(current) & 8 /* CaptureNewTarget */) {
-                    var isDeclaration_2 = node.kind !== 71 /* Identifier */;
+                if (getNodeCheckFlags(current) & 8) {
+                    var isDeclaration_2 = node.kind !== 71;
                     if (isDeclaration_2) {
                         error(ts.getNameOfDeclaration(node), ts.Diagnostics.Duplicate_identifier_newTarget_Compiler_uses_variable_declaration_newTarget_to_capture_new_target_meta_property_reference);
                     }
@@ -50073,96 +41488,57 @@ var ts;
             });
         }
         function checkCollisionWithRequireExportsInGeneratedCode(node, name) {
-            // No need to check for require or exports for ES6 modules and later
             if (moduleKind >= ts.ModuleKind.ES2015 || compilerOptions.noEmit) {
                 return;
             }
             if (!needCollisionCheckForIdentifier(node, name, "require") && !needCollisionCheckForIdentifier(node, name, "exports")) {
                 return;
             }
-            // Uninstantiated modules shouldnt do this check
-            if (ts.isModuleDeclaration(node) && ts.getModuleInstanceState(node) !== 1 /* Instantiated */) {
+            if (ts.isModuleDeclaration(node) && ts.getModuleInstanceState(node) !== 1) {
                 return;
             }
-            // In case of variable declaration, node.parent is variable statement so look at the variable statement's parent
             var parent = getDeclarationContainer(node);
-            if (parent.kind === 274 /* SourceFile */ && ts.isExternalOrCommonJsModule(parent)) {
-                // If the declaration happens to be in external module, report error that require and exports are reserved keywords
+            if (parent.kind === 274 && ts.isExternalOrCommonJsModule(parent)) {
                 error(name, ts.Diagnostics.Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module, ts.declarationNameToString(name), ts.declarationNameToString(name));
             }
         }
         function checkCollisionWithGlobalPromiseInGeneratedCode(node, name) {
-            if (languageVersion >= 4 /* ES2017 */ || compilerOptions.noEmit || !needCollisionCheckForIdentifier(node, name, "Promise")) {
+            if (languageVersion >= 4 || compilerOptions.noEmit || !needCollisionCheckForIdentifier(node, name, "Promise")) {
                 return;
             }
-            // Uninstantiated modules shouldnt do this check
-            if (ts.isModuleDeclaration(node) && ts.getModuleInstanceState(node) !== 1 /* Instantiated */) {
+            if (ts.isModuleDeclaration(node) && ts.getModuleInstanceState(node) !== 1) {
                 return;
             }
-            // In case of variable declaration, node.parent is variable statement so look at the variable statement's parent
             var parent = getDeclarationContainer(node);
-            if (parent.kind === 274 /* SourceFile */ && ts.isExternalOrCommonJsModule(parent) && parent.flags & 1024 /* HasAsyncFunctions */) {
-                // If the declaration happens to be in external module, report error that Promise is a reserved identifier.
+            if (parent.kind === 274 && ts.isExternalOrCommonJsModule(parent) && parent.flags & 1024) {
                 error(name, ts.Diagnostics.Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_functions, ts.declarationNameToString(name), ts.declarationNameToString(name));
             }
         }
         function checkVarDeclaredNamesNotShadowed(node) {
-            // - ScriptBody : StatementList
-            // It is a Syntax Error if any element of the LexicallyDeclaredNames of StatementList
-            // also occurs in the VarDeclaredNames of StatementList.
-            // - Block : { StatementList }
-            // It is a Syntax Error if any element of the LexicallyDeclaredNames of StatementList
-            // also occurs in the VarDeclaredNames of StatementList.
-            // Variable declarations are hoisted to the top of their function scope. They can shadow
-            // block scoped declarations, which bind tighter. this will not be flagged as duplicate definition
-            // by the binder as the declaration scope is different.
-            // A non-initialized declaration is a no-op as the block declaration will resolve before the var
-            // declaration. the problem is if the declaration has an initializer. this will act as a write to the
-            // block declared value. this is fine for let, but not const.
-            // Only consider declarations with initializers, uninitialized const declarations will not
-            // step on a let/const variable.
-            // Do not consider const and const declarations, as duplicate block-scoped declarations
-            // are handled by the binder.
-            // We are only looking for const declarations that step on let\const declarations from a
-            // different scope. e.g.:
-            //      {
-            //          const x = 0; // localDeclarationSymbol obtained after name resolution will correspond to this declaration
-            //          const x = 0; // symbol for this declaration will be 'symbol'
-            //      }
-            // skip block-scoped variables and parameters
-            if ((ts.getCombinedNodeFlags(node) & 3 /* BlockScoped */) !== 0 || ts.isParameterDeclaration(node)) {
+            if ((ts.getCombinedNodeFlags(node) & 3) !== 0 || ts.isParameterDeclaration(node)) {
                 return;
             }
-            // skip variable declarations that don't have initializers
-            // NOTE: in ES6 spec initializer is required in variable declarations where name is binding pattern
-            // so we'll always treat binding elements as initialized
-            if (node.kind === 232 /* VariableDeclaration */ && !node.initializer) {
+            if (node.kind === 232 && !node.initializer) {
                 return;
             }
             var symbol = getSymbolOfNode(node);
-            if (symbol.flags & 1 /* FunctionScopedVariable */) {
+            if (symbol.flags & 1) {
                 if (!ts.isIdentifier(node.name))
                     return ts.Debug.fail();
-                var localDeclarationSymbol = resolveName(node, node.name.escapedText, 3 /* Variable */, /*nodeNotFoundErrorMessage*/ undefined, /*nameArg*/ undefined, /*isUse*/ false);
+                var localDeclarationSymbol = resolveName(node, node.name.escapedText, 3, undefined, undefined, false);
                 if (localDeclarationSymbol &&
                     localDeclarationSymbol !== symbol &&
-                    localDeclarationSymbol.flags & 2 /* BlockScopedVariable */) {
-                    if (getDeclarationNodeFlagsFromSymbol(localDeclarationSymbol) & 3 /* BlockScoped */) {
-                        var varDeclList = ts.getAncestor(localDeclarationSymbol.valueDeclaration, 233 /* VariableDeclarationList */);
-                        var container = varDeclList.parent.kind === 214 /* VariableStatement */ && varDeclList.parent.parent
+                    localDeclarationSymbol.flags & 2) {
+                    if (getDeclarationNodeFlagsFromSymbol(localDeclarationSymbol) & 3) {
+                        var varDeclList = ts.getAncestor(localDeclarationSymbol.valueDeclaration, 233);
+                        var container = varDeclList.parent.kind === 214 && varDeclList.parent.parent
                             ? varDeclList.parent.parent
                             : undefined;
-                        // names of block-scoped and function scoped variables can collide only
-                        // if block scoped variable is defined in the function\module\source file scope (because of variable hoisting)
                         var namesShareScope = container &&
-                            (container.kind === 213 /* Block */ && ts.isFunctionLike(container.parent) ||
-                                container.kind === 240 /* ModuleBlock */ ||
-                                container.kind === 239 /* ModuleDeclaration */ ||
-                                container.kind === 274 /* SourceFile */);
-                        // here we know that function scoped variable is shadowed by block scoped one
-                        // if they are defined in the same scope - binder has already reported redeclaration error
-                        // otherwise if variable has an initializer - show error that initialization will fail
-                        // since LHS will be block scoped name instead of function scoped
+                            (container.kind === 213 && ts.isFunctionLike(container.parent) ||
+                                container.kind === 240 ||
+                                container.kind === 239 ||
+                                container.kind === 274);
                         if (!namesShareScope) {
                             var name = symbolToString(localDeclarationSymbol);
                             error(node, ts.Diagnostics.Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1, name, name);
@@ -50171,27 +41547,21 @@ var ts;
                 }
             }
         }
-        // Check that a parameter initializer contains no references to parameters declared to the right of itself
         function checkParameterInitializer(node) {
-            if (ts.getRootDeclaration(node).kind !== 149 /* Parameter */) {
+            if (ts.getRootDeclaration(node).kind !== 149) {
                 return;
             }
             var func = ts.getContainingFunction(node);
             visit(node.initializer);
             function visit(n) {
                 if (ts.isTypeNode(n) || ts.isDeclarationName(n)) {
-                    // do not dive in types
-                    // skip declaration names (i.e. in object literal expressions)
                     return;
                 }
-                if (n.kind === 185 /* PropertyAccessExpression */) {
-                    // skip property names in property access expression
+                if (n.kind === 185) {
                     return visit(n.expression);
                 }
-                else if (n.kind === 71 /* Identifier */) {
-                    // check FunctionLikeDeclaration.locals (stores parameters\function local variable)
-                    // if it contains entry with a specified name
-                    var symbol = resolveName(n, n.escapedText, 67216319 /* Value */ | 2097152 /* Alias */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined, /*isUse*/ false);
+                else if (n.kind === 71) {
+                    var symbol = resolveName(n, n.escapedText, 67216319 | 2097152, undefined, undefined, false);
                     if (!symbol || symbol === unknownSymbol || !symbol.valueDeclaration) {
                         return;
                     }
@@ -50199,32 +41569,24 @@ var ts;
                         error(n, ts.Diagnostics.Parameter_0_cannot_be_referenced_in_its_initializer, ts.declarationNameToString(node.name));
                         return;
                     }
-                    // locals map for function contain both parameters and function locals
-                    // so we need to do a bit of extra work to check if reference is legal
                     var enclosingContainer = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
                     if (enclosingContainer === func) {
-                        if (symbol.valueDeclaration.kind === 149 /* Parameter */ ||
-                            symbol.valueDeclaration.kind === 182 /* BindingElement */) {
-                            // it is ok to reference parameter in initializer if either
-                            // - parameter is located strictly on the left of current parameter declaration
+                        if (symbol.valueDeclaration.kind === 149 ||
+                            symbol.valueDeclaration.kind === 182) {
                             if (symbol.valueDeclaration.pos < node.pos) {
                                 return;
                             }
-                            // - parameter is wrapped in function-like entity
                             if (ts.findAncestor(n, function (current) {
                                 if (current === node.initializer) {
                                     return "quit";
                                 }
                                 return ts.isFunctionLike(current.parent) ||
-                                    // computed property names/initializers in instance property declaration of class like entities
-                                    // are executed in constructor and thus deferred
-                                    (current.parent.kind === 152 /* PropertyDeclaration */ &&
-                                        !(ts.hasModifier(current.parent, 32 /* Static */)) &&
+                                    (current.parent.kind === 152 &&
+                                        !(ts.hasModifier(current.parent, 32)) &&
                                         ts.isClassLike(current.parent.parent));
                             })) {
                                 return;
                             }
-                            // fall through to report error
                         }
                         error(n, ts.Diagnostics.Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it, ts.declarationNameToString(node.name), ts.declarationNameToString(n));
                     }
@@ -50237,68 +41599,56 @@ var ts;
         function convertAutoToAny(type) {
             return type === autoType ? anyType : type === autoArrayType ? anyArrayType : type;
         }
-        // Check variable, parameter, or property declaration
         function checkVariableLikeDeclaration(node) {
             checkDecorators(node);
             if (!ts.isBindingElement(node)) {
                 checkSourceElement(node.type);
             }
-            // JSDoc `function(string, string): string` syntax results in parameters with no name
             if (!node.name) {
                 return;
             }
-            // For a computed property, just check the initializer and exit
-            // Do not use hasDynamicName here, because that returns false for well known symbols.
-            // We want to perform checkComputedPropertyName for all computed properties, including
-            // well known symbols.
-            if (node.name.kind === 147 /* ComputedPropertyName */) {
+            if (node.name.kind === 147) {
                 checkComputedPropertyName(node.name);
                 if (node.initializer) {
                     checkExpressionCached(node.initializer);
                 }
             }
-            if (node.kind === 182 /* BindingElement */) {
-                if (node.parent.kind === 180 /* ObjectBindingPattern */ && languageVersion < 6 /* ESNext */) {
-                    checkExternalEmitHelpers(node, 4 /* Rest */);
+            if (node.kind === 182) {
+                if (node.parent.kind === 180 && languageVersion < 6) {
+                    checkExternalEmitHelpers(node, 4);
                 }
-                // check computed properties inside property names of binding elements
-                if (node.propertyName && node.propertyName.kind === 147 /* ComputedPropertyName */) {
+                if (node.propertyName && node.propertyName.kind === 147) {
                     checkComputedPropertyName(node.propertyName);
                 }
-                // check private/protected variable access
                 var parent = node.parent.parent;
                 var parentType = getTypeForBindingElementParent(parent);
                 var name = node.propertyName || node.name;
                 if (!ts.isBindingPattern(name)) {
-                    var property = getPropertyOfType(parentType, ts.getTextOfPropertyName(name)); // TODO: GH#18217
-                    markPropertyAsReferenced(property, /*nodeForCheckWriteOnly*/ undefined, /*isThisAccess*/ false); // A destructuring is never a write-only reference.
+                    var property = getPropertyOfType(parentType, ts.getTextOfPropertyName(name));
+                    markPropertyAsReferenced(property, undefined, false);
                     if (parent.initializer && property) {
                         checkPropertyAccessibility(parent, parent.initializer, parentType, property);
                     }
                 }
             }
-            // For a binding pattern, check contained binding elements
             if (ts.isBindingPattern(node.name)) {
-                if (node.name.kind === 181 /* ArrayBindingPattern */ && languageVersion < 2 /* ES2015 */ && compilerOptions.downlevelIteration) {
-                    checkExternalEmitHelpers(node, 512 /* Read */);
+                if (node.name.kind === 181 && languageVersion < 2 && compilerOptions.downlevelIteration) {
+                    checkExternalEmitHelpers(node, 512);
                 }
                 ts.forEach(node.name.elements, checkSourceElement);
             }
-            // For a parameter declaration with an initializer, error and exit if the containing function doesn't have a body
-            if (node.initializer && ts.getRootDeclaration(node).kind === 149 /* Parameter */ && ts.nodeIsMissing(ts.getContainingFunction(node).body)) {
+            if (node.initializer && ts.getRootDeclaration(node).kind === 149 && ts.nodeIsMissing(ts.getContainingFunction(node).body)) {
                 error(node, ts.Diagnostics.A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation);
                 return;
             }
-            // For a binding pattern, validate the initializer and exit
             if (ts.isBindingPattern(node.name)) {
-                // Don't validate for-in initializer as it is already an error
-                if (node.initializer && node.parent.parent.kind !== 221 /* ForInStatement */) {
+                if (node.initializer && node.parent.parent.kind !== 221) {
                     var initializerType = checkExpressionCached(node.initializer);
                     if (strictNullChecks && node.name.elements.length === 0) {
                         checkNonNullType(initializerType, node);
                     }
                     else {
-                        checkTypeAssignableTo(initializerType, getWidenedTypeForVariableLikeDeclaration(node), node, /*headMessage*/ undefined);
+                        checkTypeAssignableTo(initializerType, getWidenedTypeForVariableLikeDeclaration(node), node, undefined);
                     }
                     checkParameterInitializer(node);
                 }
@@ -50307,35 +41657,30 @@ var ts;
             var symbol = getSymbolOfNode(node);
             var type = convertAutoToAny(getTypeOfSymbol(symbol));
             if (node === symbol.valueDeclaration) {
-                // Node is the primary declaration of the symbol, just validate the initializer
-                // Don't validate for-in initializer as it is already an error
                 var initializer = ts.getEffectiveInitializer(node);
-                if (initializer && node.parent.parent.kind !== 221 /* ForInStatement */) {
-                    checkTypeAssignableTo(checkExpressionCached(initializer), type, node, /*headMessage*/ undefined);
+                if (initializer && node.parent.parent.kind !== 221) {
+                    checkTypeAssignableTo(checkExpressionCached(initializer), type, node, undefined);
                     checkParameterInitializer(node);
                 }
             }
             else {
-                // Node is a secondary declaration, check that type is identical to primary declaration and check that
-                // initializer is consistent with type associated with the node
                 var declarationType = convertAutoToAny(getWidenedTypeForVariableLikeDeclaration(node));
                 if (type !== errorType && declarationType !== errorType &&
                     !isTypeIdenticalTo(type, declarationType) &&
-                    !(symbol.flags & 67108864 /* JSContainer */)) {
+                    !(symbol.flags & 67108864)) {
                     errorNextVariableOrPropertyDeclarationMustHaveSameType(type, node, declarationType);
                 }
                 if (node.initializer) {
-                    checkTypeAssignableTo(checkExpressionCached(node.initializer), declarationType, node, /*headMessage*/ undefined);
+                    checkTypeAssignableTo(checkExpressionCached(node.initializer), declarationType, node, undefined);
                 }
                 if (!areDeclarationFlagsIdentical(node, symbol.valueDeclaration)) {
                     error(ts.getNameOfDeclaration(symbol.valueDeclaration), ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
                     error(node.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
                 }
             }
-            if (node.kind !== 152 /* PropertyDeclaration */ && node.kind !== 151 /* PropertySignature */) {
-                // We know we don't have a binding pattern or computed name here
+            if (node.kind !== 152 && node.kind !== 151) {
                 checkExportsOnMergedDeclarations(node);
-                if (node.kind === 232 /* VariableDeclaration */ || node.kind === 182 /* BindingElement */) {
+                if (node.kind === 232 || node.kind === 182) {
                     checkVarDeclaredNamesNotShadowed(node);
                 }
                 checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
@@ -50344,26 +41689,25 @@ var ts;
         }
         function errorNextVariableOrPropertyDeclarationMustHaveSameType(firstType, nextDeclaration, nextType) {
             var nextDeclarationName = ts.getNameOfDeclaration(nextDeclaration);
-            var message = nextDeclaration.kind === 152 /* PropertyDeclaration */ || nextDeclaration.kind === 151 /* PropertySignature */
+            var message = nextDeclaration.kind === 152 || nextDeclaration.kind === 151
                 ? ts.Diagnostics.Subsequent_property_declarations_must_have_the_same_type_Property_0_must_be_of_type_1_but_here_has_type_2
                 : ts.Diagnostics.Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_type_2;
             error(nextDeclarationName, message, ts.declarationNameToString(nextDeclarationName), typeToString(firstType), typeToString(nextType));
         }
         function areDeclarationFlagsIdentical(left, right) {
-            if ((left.kind === 149 /* Parameter */ && right.kind === 232 /* VariableDeclaration */) ||
-                (left.kind === 232 /* VariableDeclaration */ && right.kind === 149 /* Parameter */)) {
-                // Differences in optionality between parameters and variables are allowed.
+            if ((left.kind === 149 && right.kind === 232) ||
+                (left.kind === 232 && right.kind === 149)) {
                 return true;
             }
             if (ts.hasQuestionToken(left) !== ts.hasQuestionToken(right)) {
                 return false;
             }
-            var interestingFlags = 8 /* Private */ |
-                16 /* Protected */ |
-                256 /* Async */ |
-                128 /* Abstract */ |
-                64 /* Readonly */ |
-                32 /* Static */;
+            var interestingFlags = 8 |
+                16 |
+                256 |
+                128 |
+                64 |
+                32;
             return ts.getSelectedModifierFlags(left, interestingFlags) === ts.getSelectedModifierFlags(right, interestingFlags);
         }
         function checkVariableDeclaration(node) {
@@ -50375,47 +41719,41 @@ var ts;
             return checkVariableLikeDeclaration(node);
         }
         function checkVariableStatement(node) {
-            // Grammar checking
             if (!checkGrammarDecoratorsAndModifiers(node) && !checkGrammarVariableDeclarationList(node.declarationList))
                 checkGrammarForDisallowedLetOrConstStatement(node);
             ts.forEach(node.declarationList.declarations, checkSourceElement);
         }
         function checkExpressionStatement(node) {
-            // Grammar checking
             checkGrammarStatementInAmbientContext(node);
             checkExpression(node.expression);
         }
         function checkIfStatement(node) {
-            // Grammar checking
             checkGrammarStatementInAmbientContext(node);
             checkExpression(node.expression);
             checkSourceElement(node.thenStatement);
-            if (node.thenStatement.kind === 215 /* EmptyStatement */) {
+            if (node.thenStatement.kind === 215) {
                 error(node.thenStatement, ts.Diagnostics.The_body_of_an_if_statement_cannot_be_the_empty_statement);
             }
             checkSourceElement(node.elseStatement);
         }
         function checkDoStatement(node) {
-            // Grammar checking
             checkGrammarStatementInAmbientContext(node);
             checkSourceElement(node.statement);
             checkExpression(node.expression);
         }
         function checkWhileStatement(node) {
-            // Grammar checking
             checkGrammarStatementInAmbientContext(node);
             checkExpression(node.expression);
             checkSourceElement(node.statement);
         }
         function checkForStatement(node) {
-            // Grammar checking
             if (!checkGrammarStatementInAmbientContext(node)) {
-                if (node.initializer && node.initializer.kind === 233 /* VariableDeclarationList */) {
+                if (node.initializer && node.initializer.kind === 233) {
                     checkGrammarVariableDeclarationList(node.initializer);
                 }
             }
             if (node.initializer) {
-                if (node.initializer.kind === 233 /* VariableDeclarationList */) {
+                if (node.initializer.kind === 233) {
                     ts.forEach(node.initializer.declarations, checkVariableDeclaration);
                 }
                 else {
@@ -50435,42 +41773,27 @@ var ts;
             checkGrammarForInOrForOfStatement(node);
             if (node.awaitModifier) {
                 var functionFlags = ts.getFunctionFlags(ts.getContainingFunction(node));
-                if ((functionFlags & (4 /* Invalid */ | 2 /* Async */)) === 2 /* Async */ && languageVersion < 6 /* ESNext */) {
-                    // for..await..of in an async function or async generator function prior to ESNext requires the __asyncValues helper
-                    checkExternalEmitHelpers(node, 16384 /* ForAwaitOfIncludes */);
+                if ((functionFlags & (4 | 2)) === 2 && languageVersion < 6) {
+                    checkExternalEmitHelpers(node, 16384);
                 }
             }
-            else if (compilerOptions.downlevelIteration && languageVersion < 2 /* ES2015 */) {
-                // for..of prior to ES2015 requires the __values helper when downlevelIteration is enabled
-                checkExternalEmitHelpers(node, 256 /* ForOfIncludes */);
+            else if (compilerOptions.downlevelIteration && languageVersion < 2) {
+                checkExternalEmitHelpers(node, 256);
             }
-            // Check the LHS and RHS
-            // If the LHS is a declaration, just check it as a variable declaration, which will in turn check the RHS
-            // via checkRightHandSideOfForOf.
-            // If the LHS is an expression, check the LHS, as a destructuring assignment or as a reference.
-            // Then check that the RHS is assignable to it.
-            if (node.initializer.kind === 233 /* VariableDeclarationList */) {
+            if (node.initializer.kind === 233) {
                 checkForInOrForOfVariableDeclaration(node);
             }
             else {
                 var varExpr = node.initializer;
                 var iteratedType = checkRightHandSideOfForOf(node.expression, node.awaitModifier);
-                // There may be a destructuring assignment on the left side
-                if (varExpr.kind === 183 /* ArrayLiteralExpression */ || varExpr.kind === 184 /* ObjectLiteralExpression */) {
-                    // iteratedType may be undefined. In this case, we still want to check the structure of
-                    // varExpr, in particular making sure it's a valid LeftHandSideExpression. But we'd like
-                    // to short circuit the type relation checking as much as possible, so we pass the unknownType.
+                if (varExpr.kind === 183 || varExpr.kind === 184) {
                     checkDestructuringAssignment(varExpr, iteratedType || errorType);
                 }
                 else {
                     var leftType = checkExpression(varExpr);
                     checkReferenceExpression(varExpr, ts.Diagnostics.The_left_hand_side_of_a_for_of_statement_must_be_a_variable_or_a_property_access);
-                    // iteratedType will be undefined if the rightType was missing properties/signatures
-                    // required to get its iteratedType (like [Symbol.iterator] or next). This may be
-                    // because we accessed properties from anyType, or it may have led to an error inside
-                    // getElementTypeOfIterable.
                     if (iteratedType) {
-                        checkTypeAssignableTo(iteratedType, leftType, varExpr, /*headMessage*/ undefined);
+                        checkTypeAssignableTo(iteratedType, leftType, varExpr, undefined);
                     }
                 }
             }
@@ -50480,15 +41803,9 @@ var ts;
             }
         }
         function checkForInStatement(node) {
-            // Grammar checking
             checkGrammarForInOrForOfStatement(node);
             var rightType = checkNonNullExpression(node.expression);
-            // TypeScript 1.0 spec (April 2014): 5.4
-            // In a 'for-in' statement of the form
-            // for (let VarDecl in Expr) Statement
-            //   VarDecl must be a variable declaration without a type annotation that declares a variable of type Any,
-            //   and Expr must be an expression of type Any, an object type, or a type parameter type.
-            if (node.initializer.kind === 233 /* VariableDeclarationList */) {
+            if (node.initializer.kind === 233) {
                 var variable = node.initializer.declarations[0];
                 if (variable && ts.isBindingPattern(variable.name)) {
                     error(variable.name, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern);
@@ -50496,26 +41813,19 @@ var ts;
                 checkForInOrForOfVariableDeclaration(node);
             }
             else {
-                // In a 'for-in' statement of the form
-                // for (Var in Expr) Statement
-                //   Var must be an expression classified as a reference of type Any or the String primitive type,
-                //   and Expr must be an expression of type Any, an object type, or a type parameter type.
                 var varExpr = node.initializer;
                 var leftType = checkExpression(varExpr);
-                if (varExpr.kind === 183 /* ArrayLiteralExpression */ || varExpr.kind === 184 /* ObjectLiteralExpression */) {
+                if (varExpr.kind === 183 || varExpr.kind === 184) {
                     error(varExpr, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern);
                 }
                 else if (!isTypeAssignableTo(getIndexTypeOrString(rightType), leftType)) {
                     error(varExpr, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any);
                 }
                 else {
-                    // run check only former check succeeded to avoid cascading errors
                     checkReferenceExpression(varExpr, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_must_be_a_variable_or_a_property_access);
                 }
             }
-            // unknownType is returned i.e. if node.expression is identifier whose name cannot be resolved
-            // in this case error about missing name is already reported - do not report extra one
-            if (rightType === neverType || !isTypeAssignableToKind(rightType, 16777216 /* NonPrimitive */ | 14745600 /* InstantiableNonPrimitive */)) {
+            if (rightType === neverType || !isTypeAssignableToKind(rightType, 16777216 | 14745600)) {
                 error(node.expression, ts.Diagnostics.The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter_but_here_has_type_0, typeToString(rightType));
             }
             checkSourceElement(node.statement);
@@ -50525,7 +41835,6 @@ var ts;
         }
         function checkForInOrForOfVariableDeclaration(iterationStatement) {
             var variableDeclarationList = iterationStatement.initializer;
-            // checkGrammarForInOrForOfStatement will check that there is exactly one declaration.
             if (variableDeclarationList.declarations.length >= 1) {
                 var decl = variableDeclarationList.declarations[0];
                 checkVariableDeclaration(decl);
@@ -50533,32 +41842,23 @@ var ts;
         }
         function checkRightHandSideOfForOf(rhsExpression, awaitModifier) {
             var expressionType = checkNonNullExpression(rhsExpression);
-            return checkIteratedTypeOrElementType(expressionType, rhsExpression, /*allowStringInput*/ true, awaitModifier !== undefined);
+            return checkIteratedTypeOrElementType(expressionType, rhsExpression, true, awaitModifier !== undefined);
         }
         function checkIteratedTypeOrElementType(inputType, errorNode, allowStringInput, allowAsyncIterables) {
             if (isTypeAny(inputType)) {
                 return inputType;
             }
-            return getIteratedTypeOrElementType(inputType, errorNode, allowStringInput, allowAsyncIterables, /*checkAssignability*/ true) || anyType;
+            return getIteratedTypeOrElementType(inputType, errorNode, allowStringInput, allowAsyncIterables, true) || anyType;
         }
-        /**
-         * When consuming an iterable type in a for..of, spread, or iterator destructuring assignment
-         * we want to get the iterated type of an iterable for ES2015 or later, or the iterated type
-         * of a iterable (if defined globally) or element type of an array like for ES2015 or earlier.
-         */
         function getIteratedTypeOrElementType(inputType, errorNode, allowStringInput, allowAsyncIterables, checkAssignability) {
             if (inputType === neverType) {
-                reportTypeNotIterableError(errorNode, inputType, allowAsyncIterables); // TODO: GH#18217
+                reportTypeNotIterableError(errorNode, inputType, allowAsyncIterables);
                 return undefined;
             }
-            var uplevelIteration = languageVersion >= 2 /* ES2015 */;
+            var uplevelIteration = languageVersion >= 2;
             var downlevelIteration = !uplevelIteration && compilerOptions.downlevelIteration;
-            // Get the iterated type of an `Iterable<T>` or `IterableIterator<T>` only in ES2015
-            // or higher, when inside of an async generator or for-await-if, or when
-            // downlevelIteration is requested.
             if (uplevelIteration || downlevelIteration || allowAsyncIterables) {
-                // We only report errors for an invalid iterable type in ES2015 or higher.
-                var iteratedType = getIteratedTypeOfIterable(inputType, uplevelIteration ? errorNode : undefined, allowAsyncIterables, /*allowSyncIterables*/ true, checkAssignability);
+                var iteratedType = getIteratedTypeOfIterable(inputType, uplevelIteration ? errorNode : undefined, allowAsyncIterables, true, checkAssignability);
                 if (iteratedType || uplevelIteration) {
                     return iteratedType;
                 }
@@ -50566,45 +41866,33 @@ var ts;
             var arrayType = inputType;
             var reportedError = false;
             var hasStringConstituent = false;
-            // If strings are permitted, remove any string-like constituents from the array type.
-            // This allows us to find other non-string element types from an array unioned with
-            // a string.
             if (allowStringInput) {
-                if (arrayType.flags & 262144 /* Union */) {
-                    // After we remove all types that are StringLike, we will know if there was a string constituent
-                    // based on whether the result of filter is a new array.
+                if (arrayType.flags & 262144) {
                     var arrayTypes = inputType.types;
-                    var filteredTypes = ts.filter(arrayTypes, function (t) { return !(t.flags & 68 /* StringLike */); });
+                    var filteredTypes = ts.filter(arrayTypes, function (t) { return !(t.flags & 68); });
                     if (filteredTypes !== arrayTypes) {
-                        arrayType = getUnionType(filteredTypes, 2 /* Subtype */);
+                        arrayType = getUnionType(filteredTypes, 2);
                     }
                 }
-                else if (arrayType.flags & 68 /* StringLike */) {
+                else if (arrayType.flags & 68) {
                     arrayType = neverType;
                 }
                 hasStringConstituent = arrayType !== inputType;
                 if (hasStringConstituent) {
-                    if (languageVersion < 1 /* ES5 */) {
+                    if (languageVersion < 1) {
                         if (errorNode) {
                             error(errorNode, ts.Diagnostics.Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher);
                             reportedError = true;
                         }
                     }
-                    // Now that we've removed all the StringLike types, if no constituents remain, then the entire
-                    // arrayOrStringType was a string.
-                    if (arrayType.flags & 32768 /* Never */) {
+                    if (arrayType.flags & 32768) {
                         return stringType;
                     }
                 }
             }
             if (!isArrayLikeType(arrayType)) {
                 if (errorNode && !reportedError) {
-                    // Which error we report depends on whether we allow strings or if there was a
-                    // string constituent. For example, if the input type is number | string, we
-                    // want to say that number is not an array type. But if the input was just
-                    // number and string input is allowed, we want to say that number is not an
-                    // array type or a string type.
-                    var isIterable = !!getIteratedTypeOfIterable(inputType, /* errorNode */ undefined, allowAsyncIterables, /*allowSyncIterables*/ true, checkAssignability);
+                    var isIterable = !!getIteratedTypeOfIterable(inputType, undefined, allowAsyncIterables, true, checkAssignability);
                     var diagnostic = !allowStringInput || hasStringConstituent
                         ? downlevelIteration
                             ? ts.Diagnostics.Type_0_is_not_an_array_type_or_does_not_have_a_Symbol_iterator_method_that_returns_an_iterator
@@ -50620,54 +41908,15 @@ var ts;
                 }
                 return hasStringConstituent ? stringType : undefined;
             }
-            var arrayElementType = getIndexTypeOfType(arrayType, 1 /* Number */);
+            var arrayElementType = getIndexTypeOfType(arrayType, 1);
             if (hasStringConstituent && arrayElementType) {
-                // This is just an optimization for the case where arrayOrStringType is string | string[]
-                if (arrayElementType.flags & 68 /* StringLike */) {
+                if (arrayElementType.flags & 68) {
                     return stringType;
                 }
-                return getUnionType([arrayElementType, stringType], 2 /* Subtype */);
+                return getUnionType([arrayElementType, stringType], 2);
             }
             return arrayElementType;
         }
-        /**
-         * We want to treat type as an iterable, and get the type it is an iterable of. The iterable
-         * must have the following structure (annotated with the names of the variables below):
-         *
-         *     { // iterable
-         *         [Symbol.iterator]: { // iteratorMethod
-         *             (): Iterator<T>
-         *         }
-         *     }
-         *
-         * For an async iterable, we expect the following structure:
-         *
-         *     { // iterable
-         *         [Symbol.asyncIterator]: { // iteratorMethod
-         *             (): AsyncIterator<T>
-         *         }
-         *     }
-         *
-         * T is the type we are after. At every level that involves analyzing return types
-         * of signatures, we union the return types of all the signatures.
-         *
-         * Another thing to note is that at any step of this process, we could run into a dead end,
-         * meaning either the property is missing, or we run into the anyType. If either of these things
-         * happens, we return undefined to signal that we could not find the iterated type. If a property
-         * is missing, and the previous step did not result in 'any', then we also give an error if the
-         * caller requested it. Then the caller can decide what to do in the case where there is no iterated
-         * type. This is different from returning anyType, because that would signify that we have matched the
-         * whole pattern and that T (above) is 'any'.
-         *
-         * For a **for-of** statement, `yield*` (in a normal generator), spread, array
-         * destructuring, or normal generator we will only ever look for a `[Symbol.iterator]()`
-         * method.
-         *
-         * For an async generator we will only ever look at the `[Symbol.asyncIterator]()` method.
-         *
-         * For a **for-await-of** statement or a `yield*` in an async generator we will look for
-         * the `[Symbol.asyncIterator]()` method first, and then the `[Symbol.iterator]()` method.
-         */
         function getIteratedTypeOfIterable(type, errorNode, allowAsyncIterables, allowSyncIterables, checkAssignability) {
             if (isTypeAny(type)) {
                 return undefined;
@@ -50679,10 +41928,8 @@ var ts;
                     if (typeAsIterable.iteratedTypeOfAsyncIterable) {
                         return typeAsIterable.iteratedTypeOfAsyncIterable;
                     }
-                    // As an optimization, if the type is an instantiation of the global `AsyncIterable<T>`
-                    // or the global `AsyncIterableIterator<T>` then just grab its type argument.
-                    if (isReferenceToType(type, getGlobalAsyncIterableType(/*reportErrors*/ false)) ||
-                        isReferenceToType(type, getGlobalAsyncIterableIteratorType(/*reportErrors*/ false))) {
+                    if (isReferenceToType(type, getGlobalAsyncIterableType(false)) ||
+                        isReferenceToType(type, getGlobalAsyncIterableIteratorType(false))) {
                         return typeAsIterable.iteratedTypeOfAsyncIterable = type.typeArguments[0];
                     }
                 }
@@ -50690,10 +41937,8 @@ var ts;
                     if (typeAsIterable.iteratedTypeOfIterable) {
                         return typeAsIterable.iteratedTypeOfIterable;
                     }
-                    // As an optimization, if the type is an instantiation of the global `Iterable<T>` or
-                    // `IterableIterator<T>` then just grab its type argument.
-                    if (isReferenceToType(type, getGlobalIterableType(/*reportErrors*/ false)) ||
-                        isReferenceToType(type, getGlobalIterableIteratorType(/*reportErrors*/ false))) {
+                    if (isReferenceToType(type, getGlobalIterableType(false)) ||
+                        isReferenceToType(type, getGlobalIterableIteratorType(false))) {
                         return typeAsIterable.iteratedTypeOfIterable = type.typeArguments[0];
                     }
                 }
@@ -50702,21 +41947,17 @@ var ts;
                 if (isTypeAny(methodType)) {
                     return undefined;
                 }
-                var signatures = methodType ? getSignaturesOfType(methodType, 0 /* Call */) : undefined;
+                var signatures = methodType ? getSignaturesOfType(methodType, 0) : undefined;
                 if (!ts.some(signatures)) {
                     if (errorNode) {
-                        // only report on the first error
                         reportTypeNotIterableError(errorNode, type, allowAsyncIterables);
                         errorNode = undefined;
                     }
                     return undefined;
                 }
-                var returnType = getUnionType(ts.map(signatures, getReturnTypeOfSignature), 2 /* Subtype */);
-                var iteratedType = getIteratedTypeOfIterator(returnType, errorNode, /*isAsyncIterator*/ !!asyncMethodType);
+                var returnType = getUnionType(ts.map(signatures, getReturnTypeOfSignature), 2);
+                var iteratedType = getIteratedTypeOfIterator(returnType, errorNode, !!asyncMethodType);
                 if (checkAssignability && errorNode && iteratedType) {
-                    // If `checkAssignability` was specified, we were called from
-                    // `checkIteratedTypeOrElementType`. As such, we need to validate that
-                    // the type passed in is actually an Iterable.
                     checkTypeAssignableTo(type, asyncMethodType
                         ? createAsyncIterableType(iteratedType)
                         : createIterableType(iteratedType), errorNode);
@@ -50731,28 +41972,6 @@ var ts;
                 ? ts.Diagnostics.Type_0_must_have_a_Symbol_asyncIterator_method_that_returns_an_async_iterator
                 : ts.Diagnostics.Type_0_must_have_a_Symbol_iterator_method_that_returns_an_iterator, typeToString(type));
         }
-        /**
-         * This function has very similar logic as getIteratedTypeOfIterable, except that it operates on
-         * Iterators instead of Iterables. Here is the structure:
-         *
-         *  { // iterator
-         *      next: { // nextMethod
-         *          (): { // nextResult
-         *              value: T // nextValue
-         *          }
-         *      }
-         *  }
-         *
-         * For an async iterator, we expect the following structure:
-         *
-         *  { // iterator
-         *      next: { // nextMethod
-         *          (): PromiseLike<{ // nextResult
-         *              value: T // nextValue
-         *          }>
-         *      }
-         *  }
-         */
         function getIteratedTypeOfIterator(type, errorNode, isAsyncIterator) {
             if (isTypeAny(type)) {
                 return undefined;
@@ -50761,21 +41980,17 @@ var ts;
             if (isAsyncIterator ? typeAsIterator.iteratedTypeOfAsyncIterator : typeAsIterator.iteratedTypeOfIterator) {
                 return isAsyncIterator ? typeAsIterator.iteratedTypeOfAsyncIterator : typeAsIterator.iteratedTypeOfIterator;
             }
-            // As an optimization, if the type is an instantiation of the global `Iterator<T>` (for
-            // a non-async iterator) or the global `AsyncIterator<T>` (for an async-iterator) then
-            // just grab its type argument.
             var getIteratorType = isAsyncIterator ? getGlobalAsyncIteratorType : getGlobalIteratorType;
-            if (isReferenceToType(type, getIteratorType(/*reportErrors*/ false))) {
+            if (isReferenceToType(type, getIteratorType(false))) {
                 return isAsyncIterator
                     ? typeAsIterator.iteratedTypeOfAsyncIterator = type.typeArguments[0]
                     : typeAsIterator.iteratedTypeOfIterator = type.typeArguments[0];
             }
-            // Both async and non-async iterators must have a `next` method.
             var nextMethod = getTypeOfPropertyOfType(type, "next");
             if (isTypeAny(nextMethod)) {
                 return undefined;
             }
-            var nextMethodSignatures = nextMethod ? getSignaturesOfType(nextMethod, 0 /* Call */) : ts.emptyArray;
+            var nextMethodSignatures = nextMethod ? getSignaturesOfType(nextMethod, 0) : ts.emptyArray;
             if (nextMethodSignatures.length === 0) {
                 if (errorNode) {
                     error(errorNode, isAsyncIterator
@@ -50784,11 +41999,10 @@ var ts;
                 }
                 return undefined;
             }
-            var nextResult = getUnionType(ts.map(nextMethodSignatures, getReturnTypeOfSignature), 2 /* Subtype */);
+            var nextResult = getUnionType(ts.map(nextMethodSignatures, getReturnTypeOfSignature), 2);
             if (isTypeAny(nextResult)) {
                 return undefined;
             }
-            // For an async iterator, we must get the awaited type of the return type.
             if (isAsyncIterator) {
                 nextResult = getAwaitedTypeOfPromise(nextResult, errorNode, ts.Diagnostics.The_type_returned_by_the_next_method_of_an_async_iterator_must_be_a_promise_for_a_type_with_a_value_property);
                 if (isTypeAny(nextResult)) {
@@ -50808,37 +42022,28 @@ var ts;
                 ? typeAsIterator.iteratedTypeOfAsyncIterator = nextValue
                 : typeAsIterator.iteratedTypeOfIterator = nextValue;
         }
-        /**
-         * A generator may have a return type of `Iterator<T>`, `Iterable<T>`, or
-         * `IterableIterator<T>`. An async generator may have a return type of `AsyncIterator<T>`,
-         * `AsyncIterable<T>`, or `AsyncIterableIterator<T>`. This function can be used to extract
-         * the iterated type from this return type for contextual typing and verifying signatures.
-         */
         function getIteratedTypeOfGenerator(returnType, isAsyncGenerator) {
             if (isTypeAny(returnType)) {
                 return undefined;
             }
-            return getIteratedTypeOfIterable(returnType, /*errorNode*/ undefined, /*allowAsyncIterables*/ isAsyncGenerator, /*allowSyncIterables*/ !isAsyncGenerator, /*checkAssignability*/ false)
-                || getIteratedTypeOfIterator(returnType, /*errorNode*/ undefined, isAsyncGenerator);
+            return getIteratedTypeOfIterable(returnType, undefined, isAsyncGenerator, !isAsyncGenerator, false)
+                || getIteratedTypeOfIterator(returnType, undefined, isAsyncGenerator);
         }
         function checkBreakOrContinueStatement(node) {
-            // Grammar checking
             if (!checkGrammarStatementInAmbientContext(node))
                 checkGrammarBreakOrContinueStatement(node);
-            // TODO: Check that target label is valid
         }
         function isGetAccessorWithAnnotatedSetAccessor(node) {
-            return node.kind === 156 /* GetAccessor */
-                && ts.getEffectiveSetAccessorTypeAnnotationNode(ts.getDeclarationOfKind(node.symbol, 157 /* SetAccessor */)) !== undefined;
+            return node.kind === 156
+                && ts.getEffectiveSetAccessorTypeAnnotationNode(ts.getDeclarationOfKind(node.symbol, 157)) !== undefined;
         }
         function isUnwrappedReturnTypeVoidOrAny(func, returnType) {
-            var unwrappedReturnType = (ts.getFunctionFlags(func) & 3 /* AsyncGenerator */) === 2 /* Async */
-                ? getPromisedTypeOfPromise(returnType) // Async function
-                : returnType; // AsyncGenerator function, Generator function, or normal function
-            return !!unwrappedReturnType && maybeTypeOfKind(unwrappedReturnType, 4096 /* Void */ | 3 /* AnyOrUnknown */);
+            var unwrappedReturnType = (ts.getFunctionFlags(func) & 3) === 2
+                ? getPromisedTypeOfPromise(returnType)
+                : returnType;
+            return !!unwrappedReturnType && maybeTypeOfKind(unwrappedReturnType, 4096 | 3);
         }
         function checkReturnStatement(node) {
-            // Grammar checking
             if (checkGrammarStatementInAmbientContext(node)) {
                 return;
             }
@@ -50850,34 +42055,27 @@ var ts;
             var signature = getSignatureFromDeclaration(func);
             var returnType = getReturnTypeOfSignature(signature);
             var functionFlags = ts.getFunctionFlags(func);
-            var isGenerator = functionFlags & 1 /* Generator */;
-            if (strictNullChecks || node.expression || returnType.flags & 32768 /* Never */) {
+            var isGenerator = functionFlags & 1;
+            if (strictNullChecks || node.expression || returnType.flags & 32768) {
                 var exprType = node.expression ? checkExpressionCached(node.expression) : undefinedType;
-                if (isGenerator) { // AsyncGenerator function or Generator function
-                    // A generator does not need its return expressions checked against its return type.
-                    // Instead, the yield expressions are checked against the element type.
-                    // TODO: Check return types of generators when return type tracking is added
-                    // for generators.
+                if (isGenerator) {
                     return;
                 }
-                else if (func.kind === 157 /* SetAccessor */) {
+                else if (func.kind === 157) {
                     if (node.expression) {
                         error(node, ts.Diagnostics.Setters_cannot_return_a_value);
                     }
                 }
-                else if (func.kind === 155 /* Constructor */) {
+                else if (func.kind === 155) {
                     if (node.expression && !checkTypeAssignableTo(exprType, returnType, node)) {
                         error(node, ts.Diagnostics.Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class);
                     }
                 }
                 else if (ts.getEffectiveReturnTypeNode(func) || isGetAccessorWithAnnotatedSetAccessor(func)) {
-                    if (functionFlags & 2 /* Async */) { // Async function
+                    if (functionFlags & 2) {
                         var promisedType = getPromisedTypeOfPromise(returnType);
                         var awaitedType = checkAwaitedType(exprType, node, ts.Diagnostics.The_return_type_of_an_async_function_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member);
                         if (promisedType) {
-                            // If the function has a return type, but promisedType is
-                            // undefined, an error will be reported in checkAsyncFunctionReturnType
-                            // so we don't need to report one here.
                             checkTypeAssignableTo(awaitedType, promisedType, node);
                         }
                     }
@@ -50886,15 +42084,13 @@ var ts;
                     }
                 }
             }
-            else if (func.kind !== 155 /* Constructor */ && compilerOptions.noImplicitReturns && !isUnwrappedReturnTypeVoidOrAny(func, returnType) && !isGenerator) {
-                // The function has a return type, but the return statement doesn't have an expression.
+            else if (func.kind !== 155 && compilerOptions.noImplicitReturns && !isUnwrappedReturnTypeVoidOrAny(func, returnType) && !isGenerator) {
                 error(node, ts.Diagnostics.Not_all_code_paths_return_a_value);
             }
         }
         function checkWithStatement(node) {
-            // Grammar checking for withStatement
             if (!checkGrammarStatementInAmbientContext(node)) {
-                if (node.flags & 16384 /* AwaitContext */) {
+                if (node.flags & 16384) {
                     grammarErrorOnFirstToken(node, ts.Diagnostics.with_statements_are_not_allowed_in_an_async_function_block);
                 }
             }
@@ -50907,15 +42103,13 @@ var ts;
             }
         }
         function checkSwitchStatement(node) {
-            // Grammar checking
             checkGrammarStatementInAmbientContext(node);
             var firstDefaultClause;
             var hasDuplicateDefaultClause = false;
             var expressionType = checkExpression(node.expression);
             var expressionIsLiteral = isLiteralType(expressionType);
             ts.forEach(node.caseBlock.clauses, function (clause) {
-                // Grammar check for duplicate default clauses, skip if we already report duplicate default clause
-                if (clause.kind === 267 /* DefaultClause */ && !hasDuplicateDefaultClause) {
+                if (clause.kind === 267 && !hasDuplicateDefaultClause) {
                     if (firstDefaultClause === undefined) {
                         firstDefaultClause = clause;
                     }
@@ -50927,10 +42121,7 @@ var ts;
                         hasDuplicateDefaultClause = true;
                     }
                 }
-                if (produceDiagnostics && clause.kind === 266 /* CaseClause */) {
-                    // TypeScript 1.0 spec (April 2014): 5.9
-                    // In a 'switch' statement, each 'case' expression must be of a type that is comparable
-                    // to or from the type of the 'switch' expression.
+                if (produceDiagnostics && clause.kind === 266) {
                     var caseType = checkExpression(clause.expression);
                     var caseIsLiteral = isLiteralType(caseType);
                     var comparedExpressionType = expressionType;
@@ -50939,8 +42130,7 @@ var ts;
                         comparedExpressionType = getBaseTypeOfLiteralType(expressionType);
                     }
                     if (!isTypeEqualityComparableTo(comparedExpressionType, caseType)) {
-                        // expressionType is not comparable to caseType, try the reversed check and report errors if it fails
-                        checkTypeComparableTo(caseType, comparedExpressionType, clause.expression, /*headMessage*/ undefined);
+                        checkTypeComparableTo(caseType, comparedExpressionType, clause.expression, undefined);
                     }
                 }
                 ts.forEach(clause.statements, checkSourceElement);
@@ -50950,24 +42140,21 @@ var ts;
             }
         }
         function checkLabeledStatement(node) {
-            // Grammar checking
             if (!checkGrammarStatementInAmbientContext(node)) {
                 ts.findAncestor(node.parent, function (current) {
                     if (ts.isFunctionLike(current)) {
                         return "quit";
                     }
-                    if (current.kind === 228 /* LabeledStatement */ && current.label.escapedText === node.label.escapedText) {
+                    if (current.kind === 228 && current.label.escapedText === node.label.escapedText) {
                         grammarErrorOnNode(node.label, ts.Diagnostics.Duplicate_label_0, ts.getTextOfNode(node.label));
                         return true;
                     }
                     return false;
                 });
             }
-            // ensure that label is unique
             checkSourceElement(node.statement);
         }
         function checkThrowStatement(node) {
-            // Grammar checking
             if (!checkGrammarStatementInAmbientContext(node)) {
                 if (node.expression === undefined) {
                     grammarErrorAfterFirstToken(node, ts.Diagnostics.Line_break_not_permitted_here);
@@ -50978,12 +42165,10 @@ var ts;
             }
         }
         function checkTryStatement(node) {
-            // Grammar checking
             checkGrammarStatementInAmbientContext(node);
             checkBlock(node.tryBlock);
             var catchClause = node.catchClause;
             if (catchClause) {
-                // Grammar checking
                 if (catchClause.variableDeclaration) {
                     if (catchClause.variableDeclaration.type) {
                         grammarErrorOnFirstToken(catchClause.variableDeclaration.type, ts.Diagnostics.Catch_clause_variable_cannot_have_a_type_annotation);
@@ -50996,7 +42181,7 @@ var ts;
                         if (blockLocals_1) {
                             ts.forEachKey(catchClause.locals, function (caughtName) {
                                 var blockLocal = blockLocals_1.get(caughtName);
-                                if (blockLocal && (blockLocal.flags & 2 /* BlockScopedVariable */) !== 0) {
+                                if (blockLocal && (blockLocal.flags & 2) !== 0) {
                                     grammarErrorOnNode(blockLocal.valueDeclaration, ts.Diagnostics.Cannot_redeclare_identifier_0_in_catch_clause, caughtName);
                                 }
                             });
@@ -51010,28 +42195,25 @@ var ts;
             }
         }
         function checkIndexConstraints(type) {
-            var declaredNumberIndexer = getIndexDeclarationOfSymbol(type.symbol, 1 /* Number */);
-            var declaredStringIndexer = getIndexDeclarationOfSymbol(type.symbol, 0 /* String */);
-            var stringIndexType = getIndexTypeOfType(type, 0 /* String */);
-            var numberIndexType = getIndexTypeOfType(type, 1 /* Number */);
+            var declaredNumberIndexer = getIndexDeclarationOfSymbol(type.symbol, 1);
+            var declaredStringIndexer = getIndexDeclarationOfSymbol(type.symbol, 0);
+            var stringIndexType = getIndexTypeOfType(type, 0);
+            var numberIndexType = getIndexTypeOfType(type, 1);
             if (stringIndexType || numberIndexType) {
                 ts.forEach(getPropertiesOfObjectType(type), function (prop) {
                     var propType = getTypeOfSymbol(prop);
-                    checkIndexConstraintForProperty(prop, propType, type, declaredStringIndexer, stringIndexType, 0 /* String */);
-                    checkIndexConstraintForProperty(prop, propType, type, declaredNumberIndexer, numberIndexType, 1 /* Number */);
+                    checkIndexConstraintForProperty(prop, propType, type, declaredStringIndexer, stringIndexType, 0);
+                    checkIndexConstraintForProperty(prop, propType, type, declaredNumberIndexer, numberIndexType, 1);
                 });
                 var classDeclaration = type.symbol.valueDeclaration;
-                if (ts.getObjectFlags(type) & 1 /* Class */ && ts.isClassLike(classDeclaration)) {
+                if (ts.getObjectFlags(type) & 1 && ts.isClassLike(classDeclaration)) {
                     for (var _i = 0, _a = classDeclaration.members; _i < _a.length; _i++) {
                         var member = _a[_i];
-                        // Only process instance properties with computed names here.
-                        // Static properties cannot be in conflict with indexers,
-                        // and properties with literal names were already checked.
-                        if (!ts.hasModifier(member, 32 /* Static */) && hasNonBindableDynamicName(member)) {
+                        if (!ts.hasModifier(member, 32) && hasNonBindableDynamicName(member)) {
                             var symbol = getSymbolOfNode(member);
                             var propType = getTypeOfSymbol(symbol);
-                            checkIndexConstraintForProperty(symbol, propType, type, declaredStringIndexer, stringIndexType, 0 /* String */);
-                            checkIndexConstraintForProperty(symbol, propType, type, declaredNumberIndexer, numberIndexType, 1 /* Number */);
+                            checkIndexConstraintForProperty(symbol, propType, type, declaredStringIndexer, stringIndexType, 0);
+                            checkIndexConstraintForProperty(symbol, propType, type, declaredNumberIndexer, numberIndexType, 1);
                         }
                     }
                 }
@@ -51039,46 +42221,38 @@ var ts;
             var errorNode;
             if (stringIndexType && numberIndexType) {
                 errorNode = declaredNumberIndexer || declaredStringIndexer;
-                // condition 'errorNode === undefined' may appear if types does not declare nor string neither number indexer
-                if (!errorNode && (ts.getObjectFlags(type) & 2 /* Interface */)) {
-                    var someBaseTypeHasBothIndexers = ts.forEach(getBaseTypes(type), function (base) { return getIndexTypeOfType(base, 0 /* String */) && getIndexTypeOfType(base, 1 /* Number */); });
+                if (!errorNode && (ts.getObjectFlags(type) & 2)) {
+                    var someBaseTypeHasBothIndexers = ts.forEach(getBaseTypes(type), function (base) { return getIndexTypeOfType(base, 0) && getIndexTypeOfType(base, 1); });
                     errorNode = someBaseTypeHasBothIndexers ? undefined : type.symbol.declarations[0];
                 }
             }
-            if (errorNode && !isTypeAssignableTo(numberIndexType, stringIndexType)) { // TODO: GH#18217
+            if (errorNode && !isTypeAssignableTo(numberIndexType, stringIndexType)) {
                 error(errorNode, ts.Diagnostics.Numeric_index_type_0_is_not_assignable_to_string_index_type_1, typeToString(numberIndexType), typeToString(stringIndexType));
             }
             function checkIndexConstraintForProperty(prop, propertyType, containingType, indexDeclaration, indexType, indexKind) {
-                // ESSymbol properties apply to neither string nor numeric indexers.
                 if (!indexType || ts.isKnownSymbol(prop)) {
                     return;
                 }
                 var propDeclaration = prop.valueDeclaration;
-                // index is numeric and property name is not valid numeric literal
-                if (indexKind === 1 /* Number */ && !(propDeclaration ? isNumericName(ts.getNameOfDeclaration(propDeclaration)) : isNumericLiteralName(prop.escapedName))) {
+                if (indexKind === 1 && !(propDeclaration ? isNumericName(ts.getNameOfDeclaration(propDeclaration)) : isNumericLiteralName(prop.escapedName))) {
                     return;
                 }
-                // perform property check if property or indexer is declared in 'type'
-                // this allows us to rule out cases when both property and indexer are inherited from the base class
                 var errorNode;
                 if (propDeclaration &&
-                    (propDeclaration.kind === 200 /* BinaryExpression */ ||
-                        ts.getNameOfDeclaration(propDeclaration).kind === 147 /* ComputedPropertyName */ ||
+                    (propDeclaration.kind === 200 ||
+                        ts.getNameOfDeclaration(propDeclaration).kind === 147 ||
                         prop.parent === containingType.symbol)) {
                     errorNode = propDeclaration;
                 }
                 else if (indexDeclaration) {
                     errorNode = indexDeclaration;
                 }
-                else if (ts.getObjectFlags(containingType) & 2 /* Interface */) {
-                    // for interfaces property and indexer might be inherited from different bases
-                    // check if any base class already has both property and indexer.
-                    // check should be performed only if 'type' is the first type that brings property\indexer together
+                else if (ts.getObjectFlags(containingType) & 2) {
                     var someBaseClassHasBothPropertyAndIndexer = ts.forEach(getBaseTypes(containingType), function (base) { return getPropertyOfObjectType(base, prop.escapedName) && getIndexTypeOfType(base, indexKind); });
                     errorNode = someBaseClassHasBothPropertyAndIndexer ? undefined : containingType.symbol.declarations[0];
                 }
                 if (errorNode && !isTypeAssignableTo(propertyType, indexType)) {
-                    var errorMessage = indexKind === 0 /* String */
+                    var errorMessage = indexKind === 0
                         ? ts.Diagnostics.Property_0_of_type_1_is_not_assignable_to_string_index_type_2
                         : ts.Diagnostics.Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2;
                     error(errorNode, errorMessage, symbolToString(prop), typeToString(propertyType), typeToString(indexType));
@@ -51086,8 +42260,6 @@ var ts;
             }
         }
         function checkTypeNameIsReserved(name, message) {
-            // TS 1.0 spec (April 2014): 3.6.1
-            // The predefined type keywords are reserved and cannot be used as names of user defined types.
             switch (name.escapedText) {
                 case "any":
                 case "unknown":
@@ -51100,18 +42272,12 @@ var ts;
                     error(name, message, name.escapedText);
             }
         }
-        /**
-         * The name cannot be used as 'Object' of user defined types with special target.
-         */
         function checkClassNameCollisionWithObject(name) {
-            if (languageVersion === 1 /* ES5 */ && name.escapedText === "Object"
+            if (languageVersion === 1 && name.escapedText === "Object"
                 && moduleKind !== ts.ModuleKind.ES2015 && moduleKind !== ts.ModuleKind.ESNext) {
-                error(name, ts.Diagnostics.Class_name_cannot_be_Object_when_targeting_ES5_with_module_0, ts.ModuleKind[moduleKind]); // https://github.com/Microsoft/TypeScript/issues/17494
+                error(name, ts.Diagnostics.Class_name_cannot_be_Object_when_targeting_ES5_with_module_0, ts.ModuleKind[moduleKind]);
             }
         }
-        /**
-         * Check each type parameter and check that type parameters have no duplicate type parameter declarations
-         */
         function checkTypeParameters(typeParameterDeclarations) {
             if (typeParameterDeclarations) {
                 var seenDefault = false;
@@ -51134,7 +42300,6 @@ var ts;
                 }
             }
         }
-        /** Check that type parameter lists are identical across multiple declarations */
         function checkTypeParameterListsIdentical(symbol) {
             if (symbol.declarations.length === 1) {
                 return;
@@ -51148,10 +42313,9 @@ var ts;
                 }
                 var type = getDeclaredTypeOfSymbol(symbol);
                 if (!areTypeParametersIdentical(declarations, type.localTypeParameters)) {
-                    // Report an error on every conflicting declaration.
                     var name = symbolToString(symbol);
-                    for (var _i = 0, declarations_5 = declarations; _i < declarations_5.length; _i++) {
-                        var declaration = declarations_5[_i];
+                    for (var _i = 0, declarations_6 = declarations; _i < declarations_6.length; _i++) {
+                        var declaration = declarations_6[_i];
                         error(declaration.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_type_parameters, name);
                     }
                 }
@@ -51160,9 +42324,8 @@ var ts;
         function areTypeParametersIdentical(declarations, targetParameters) {
             var maxTypeArgumentCount = ts.length(targetParameters);
             var minTypeArgumentCount = getMinTypeArgumentCount(targetParameters);
-            for (var _i = 0, declarations_6 = declarations; _i < declarations_6.length; _i++) {
-                var declaration = declarations_6[_i];
-                // If this declaration has too few or too many type parameters, we report an error
+            for (var _i = 0, declarations_7 = declarations; _i < declarations_7.length; _i++) {
+                var declaration = declarations_7[_i];
                 var sourceParameters = ts.getEffectiveTypeParameterDeclarations(declaration);
                 var numTypeParameters = sourceParameters.length;
                 if (numTypeParameters < minTypeArgumentCount || numTypeParameters > maxTypeArgumentCount) {
@@ -51171,23 +42334,16 @@ var ts;
                 for (var i = 0; i < numTypeParameters; i++) {
                     var source = sourceParameters[i];
                     var target = targetParameters[i];
-                    // If the type parameter node does not have the same as the resolved type
-                    // parameter at this position, we report an error.
                     if (source.name.escapedText !== target.symbol.escapedName) {
                         return false;
                     }
-                    // If the type parameter node does not have an identical constraint as the resolved
-                    // type parameter at this position, we report an error.
                     var sourceConstraint = source.constraint && getTypeFromTypeNode(source.constraint);
                     var targetConstraint = getConstraintFromTypeParameter(target);
                     if (sourceConstraint) {
-                        // relax check if later interface augmentation has no constraint
                         if (!targetConstraint || !isTypeIdenticalTo(sourceConstraint, targetConstraint)) {
                             return false;
                         }
                     }
-                    // If the type parameter node has a default and it is not identical to the default
-                    // for the type parameter at this position, we report an error.
                     var sourceDefault = source.default && getTypeFromTypeNode(source.default);
                     var targetDefault = getDefaultFromTypeParameter(target);
                     if (sourceDefault && targetDefault && !isTypeIdenticalTo(sourceDefault, targetDefault)) {
@@ -51207,7 +42363,7 @@ var ts;
             registerForUnusedIdentifiersCheck(node);
         }
         function checkClassDeclaration(node) {
-            if (!node.name && !ts.hasModifier(node, 512 /* Default */)) {
+            if (!node.name && !ts.hasModifier(node, 512)) {
                 grammarErrorOnFirstToken(node, ts.Diagnostics.A_class_declaration_without_the_default_modifier_must_have_a_name);
             }
             checkClassLikeDeclaration(node);
@@ -51221,7 +42377,7 @@ var ts;
                 checkTypeNameIsReserved(node.name, ts.Diagnostics.Class_name_cannot_be_0);
                 checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
                 checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
-                if (!(node.flags & 4194304 /* Ambient */)) {
+                if (!(node.flags & 4194304)) {
                     checkClassNameCollisionWithObject(node.name);
                 }
             }
@@ -51233,14 +42389,13 @@ var ts;
             var staticType = getTypeOfSymbol(symbol);
             checkTypeParameterListsIdentical(symbol);
             checkClassForDuplicateDeclarations(node);
-            // Only check for reserved static identifiers on non-ambient context.
-            if (!(node.flags & 4194304 /* Ambient */)) {
+            if (!(node.flags & 4194304)) {
                 checkClassForStaticPropertyNameConflicts(node);
             }
             var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
             if (baseTypeNode) {
-                if (languageVersion < 2 /* ES2015 */) {
-                    checkExternalEmitHelpers(baseTypeNode.parent, 1 /* Extends */);
+                if (languageVersion < 2) {
+                    checkExternalEmitHelpers(baseTypeNode.parent, 1);
                 }
                 var baseTypes = getBaseTypes(type);
                 if (baseTypes.length && produceDiagnostics) {
@@ -51259,18 +42414,14 @@ var ts;
                         }
                     }
                     var baseWithThis = getTypeWithThisArgument(baseType_1, type.thisType);
-                    if (!checkTypeAssignableTo(typeWithThis, baseWithThis, /*errorNode*/ undefined)) {
+                    if (!checkTypeAssignableTo(typeWithThis, baseWithThis, undefined)) {
                         issueMemberSpecificError(node, typeWithThis, baseWithThis, ts.Diagnostics.Class_0_incorrectly_extends_base_class_1);
                     }
                     checkTypeAssignableTo(staticType, getTypeWithoutSignatures(staticBaseType), node.name || node, ts.Diagnostics.Class_static_side_0_incorrectly_extends_base_class_static_side_1);
-                    if (baseConstructorType.flags & 2162688 /* TypeVariable */ && !isMixinConstructorType(staticType)) {
+                    if (baseConstructorType.flags & 2162688 && !isMixinConstructorType(staticType)) {
                         error(node.name || node, ts.Diagnostics.A_mixin_class_must_have_a_constructor_with_a_single_rest_parameter_of_type_any);
                     }
-                    if (!(staticBaseType.symbol && staticBaseType.symbol.flags & 32 /* Class */) && !(baseConstructorType.flags & 2162688 /* TypeVariable */)) {
-                        // When the static base type is a "class-like" constructor function (but not actually a class), we verify
-                        // that all instantiated base constructor signatures return the same type. We can simply compare the type
-                        // references (as opposed to checking the structure of the types) because elsewhere we have already checked
-                        // that the base type is a class or interface type (and not, for example, an anonymous object type).
+                    if (!(staticBaseType.symbol && staticBaseType.symbol.flags & 32) && !(baseConstructorType.flags & 2162688)) {
                         var constructors = getInstantiatedConstructorsForTypeArguments(staticBaseType, baseTypeNode.typeArguments, baseTypeNode);
                         if (ts.forEach(constructors, function (sig) { return getReturnTypeOfSignature(sig) !== baseType_1; })) {
                             error(baseTypeNode.expression, ts.Diagnostics.Base_constructors_must_all_have_the_same_return_type);
@@ -51291,11 +42442,11 @@ var ts;
                         var t = getTypeFromTypeNode(typeRefNode);
                         if (t !== errorType) {
                             if (isValidBaseType(t)) {
-                                var genericDiag = t.symbol && t.symbol.flags & 32 /* Class */ ?
+                                var genericDiag = t.symbol && t.symbol.flags & 32 ?
                                     ts.Diagnostics.Class_0_incorrectly_implements_class_1_Did_you_mean_to_extend_1_and_inherit_its_members_as_a_subclass :
                                     ts.Diagnostics.Class_0_incorrectly_implements_interface_1;
                                 var baseWithThis = getTypeWithThisArgument(t, type.thisType);
-                                if (!checkTypeAssignableTo(typeWithThis, baseWithThis, /*errorNode*/ undefined)) {
+                                if (!checkTypeAssignableTo(typeWithThis, baseWithThis, undefined)) {
                                     issueMemberSpecificError(node, typeWithThis, baseWithThis, genericDiag);
                                 }
                             }
@@ -51313,9 +42464,8 @@ var ts;
             }
         }
         function issueMemberSpecificError(node, typeWithThis, baseWithThis, broadDiag) {
-            // iterate over all implemented properties and issue errors on each one which isn't compatible, rather than the class as a whole, if possible
             var issuedMemberError = false;
-            var _loop_6 = function (member) {
+            var _loop_9 = function (member) {
                 if (ts.hasStaticModifier(member)) {
                     return "continue";
                 }
@@ -51324,9 +42474,8 @@ var ts;
                     var prop = getPropertyOfType(typeWithThis, declaredProp.escapedName);
                     var baseProp = getPropertyOfType(baseWithThis, declaredProp.escapedName);
                     if (prop && baseProp) {
-                        var rootChain = function () { return ts.chainDiagnosticMessages(
-                        /*details*/ undefined, ts.Diagnostics.Property_0_in_type_1_is_not_assignable_to_the_same_property_in_base_type_2, symbolToString(declaredProp), typeToString(typeWithThis), typeToString(baseWithThis)); };
-                        if (!checkTypeAssignableTo(getTypeOfSymbol(prop), getTypeOfSymbol(baseProp), member.name || member, /*message*/ undefined, rootChain)) {
+                        var rootChain = function () { return ts.chainDiagnosticMessages(undefined, ts.Diagnostics.Property_0_in_type_1_is_not_assignable_to_the_same_property_in_base_type_2, symbolToString(declaredProp), typeToString(typeWithThis), typeToString(baseWithThis)); };
+                        if (!checkTypeAssignableTo(getTypeOfSymbol(prop), getTypeOfSymbol(baseProp), member.name || member, undefined, rootChain)) {
                             issuedMemberError = true;
                         }
                     }
@@ -51334,18 +42483,17 @@ var ts;
             };
             for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
                 var member = _a[_i];
-                _loop_6(member);
+                _loop_9(member);
             }
             if (!issuedMemberError) {
-                // check again with diagnostics to generate a less-specific error
                 checkTypeAssignableTo(typeWithThis, baseWithThis, node.name || node, broadDiag);
             }
         }
         function checkBaseTypeAccessibility(type, node) {
-            var signatures = getSignaturesOfType(type, 1 /* Construct */);
+            var signatures = getSignaturesOfType(type, 1);
             if (signatures.length) {
                 var declaration = signatures[0].declaration;
-                if (declaration && ts.hasModifier(declaration, 8 /* Private */)) {
+                if (declaration && ts.hasModifier(declaration, 8)) {
                     var typeClassDeclaration = ts.getClassLikeDeclarationOfSymbol(type.symbol);
                     if (!isNodeWithinClass(node, typeClassDeclaration)) {
                         error(node, ts.Diagnostics.Cannot_extend_a_class_0_Class_constructor_is_marked_as_private, getFullyQualifiedName(type.symbol));
@@ -51354,52 +42502,29 @@ var ts;
             }
         }
         function getTargetSymbol(s) {
-            // if symbol is instantiated its flags are not copied from the 'target'
-            // so we'll need to get back original 'target' symbol to work with correct set of flags
-            return ts.getCheckFlags(s) & 1 /* Instantiated */ ? s.target : s;
+            return ts.getCheckFlags(s) & 1 ? s.target : s;
         }
         function getClassOrInterfaceDeclarationsOfSymbol(symbol) {
             return ts.filter(symbol.declarations, function (d) {
-                return d.kind === 235 /* ClassDeclaration */ || d.kind === 236 /* InterfaceDeclaration */;
+                return d.kind === 235 || d.kind === 236;
             });
         }
         function checkKindsOfPropertyMemberOverrides(type, baseType) {
-            // TypeScript 1.0 spec (April 2014): 8.2.3
-            // A derived class inherits all members from its base class it doesn't override.
-            // Inheritance means that a derived class implicitly contains all non - overridden members of the base class.
-            // Both public and private property members are inherited, but only public property members can be overridden.
-            // A property member in a derived class is said to override a property member in a base class
-            // when the derived class property member has the same name and kind(instance or static)
-            // as the base class property member.
-            // The type of an overriding property member must be assignable(section 3.8.4)
-            // to the type of the overridden property member, or otherwise a compile - time error occurs.
-            // Base class instance member functions can be overridden by derived class instance member functions,
-            // but not by other kinds of members.
-            // Base class instance member variables and accessors can be overridden by
-            // derived class instance member variables and accessors, but not by other kinds of members.
-            // NOTE: assignability is checked in checkClassDeclaration
             var baseProperties = getPropertiesOfType(baseType);
             for (var _i = 0, baseProperties_1 = baseProperties; _i < baseProperties_1.length; _i++) {
                 var baseProperty = baseProperties_1[_i];
                 var base = getTargetSymbol(baseProperty);
-                if (base.flags & 4194304 /* Prototype */) {
+                if (base.flags & 4194304) {
                     continue;
                 }
-                var derived = getTargetSymbol(getPropertyOfObjectType(type, base.escapedName)); // TODO: GH#18217
+                var derived = getTargetSymbol(getPropertyOfObjectType(type, base.escapedName));
                 var baseDeclarationFlags = ts.getDeclarationModifierFlagsFromSymbol(base);
                 ts.Debug.assert(!!derived, "derived should point to something, even if it is the base class' declaration.");
                 if (derived) {
-                    // In order to resolve whether the inherited method was overridden in the base class or not,
-                    // we compare the Symbols obtained. Since getTargetSymbol returns the symbol on the *uninstantiated*
-                    // type declaration, derived and base resolve to the same symbol even in the case of generic classes.
                     if (derived === base) {
-                        // derived class inherits base without override/redeclaration
                         var derivedClassDecl = ts.getClassLikeDeclarationOfSymbol(type.symbol);
-                        // It is an error to inherit an abstract member without implementing it or being declared abstract.
-                        // If there is no declaration for the derived class (as in the case of class expressions),
-                        // then the class cannot be declared abstract.
-                        if (baseDeclarationFlags & 128 /* Abstract */ && (!derivedClassDecl || !ts.hasModifier(derivedClassDecl, 128 /* Abstract */))) {
-                            if (derivedClassDecl.kind === 205 /* ClassExpression */) {
+                        if (baseDeclarationFlags & 128 && (!derivedClassDecl || !ts.hasModifier(derivedClassDecl, 128))) {
+                            if (derivedClassDecl.kind === 205) {
                                 error(derivedClassDecl, ts.Diagnostics.Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1, symbolToString(baseProperty), typeToString(baseType));
                             }
                             else {
@@ -51408,26 +42533,23 @@ var ts;
                         }
                     }
                     else {
-                        // derived overrides base.
                         var derivedDeclarationFlags = ts.getDeclarationModifierFlagsFromSymbol(derived);
-                        if (baseDeclarationFlags & 8 /* Private */ || derivedDeclarationFlags & 8 /* Private */) {
-                            // either base or derived property is private - not override, skip it
+                        if (baseDeclarationFlags & 8 || derivedDeclarationFlags & 8) {
                             continue;
                         }
-                        if (isPrototypeProperty(base) || base.flags & 98308 /* PropertyOrAccessor */ && derived.flags & 98308 /* PropertyOrAccessor */) {
-                            // method is overridden with method or property/accessor is overridden with property/accessor - correct case
+                        if (isPrototypeProperty(base) || base.flags & 98308 && derived.flags & 98308) {
                             continue;
                         }
                         var errorMessage = void 0;
                         if (isPrototypeProperty(base)) {
-                            if (derived.flags & 98304 /* Accessor */) {
+                            if (derived.flags & 98304) {
                                 errorMessage = ts.Diagnostics.Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_accessor;
                             }
                             else {
                                 errorMessage = ts.Diagnostics.Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_property;
                             }
                         }
-                        else if (base.flags & 98304 /* Accessor */) {
+                        else if (base.flags & 98304) {
                             errorMessage = ts.Diagnostics.Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_function;
                         }
                         else {
@@ -51461,7 +42583,7 @@ var ts;
                             ok = false;
                             var typeName1 = typeToString(existing.containingType);
                             var typeName2 = typeToString(base);
-                            var errorInfo = ts.chainDiagnosticMessages(/*details*/ undefined, ts.Diagnostics.Named_property_0_of_types_1_and_2_are_not_identical, symbolToString(prop), typeName1, typeName2);
+                            var errorInfo = ts.chainDiagnosticMessages(undefined, ts.Diagnostics.Named_property_0_of_types_1_and_2_are_not_identical, symbolToString(prop), typeName1, typeName2);
                             errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Interface_0_cannot_simultaneously_extend_types_1_and_2, typeToString(type), typeName1, typeName2);
                             diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(typeNode, errorInfo));
                         }
@@ -51471,7 +42593,7 @@ var ts;
             return ok;
         }
         function checkPropertyInitialization(node) {
-            if (!strictNullChecks || !strictPropertyInitialization || node.flags & 4194304 /* Ambient */) {
+            if (!strictNullChecks || !strictPropertyInitialization || node.flags & 4194304) {
                 return;
             }
             var constructor = findConstructorDeclaration(node);
@@ -51481,7 +42603,7 @@ var ts;
                     var propName = member.name;
                     if (ts.isIdentifier(propName)) {
                         var type = getTypeOfSymbol(getSymbolOfNode(member));
-                        if (!(type.flags & 3 /* AnyOrUnknown */ || getFalsyFlags(type) & 8192 /* Undefined */)) {
+                        if (!(type.flags & 3 || getFalsyFlags(type) & 8192)) {
                             if (!constructor || !isPropertyInitializedInConstructor(propName, type, constructor)) {
                                 error(member.name, ts.Diagnostics.Property_0_has_no_initializer_and_is_not_definitely_assigned_in_the_constructor, ts.declarationNameToString(propName));
                             }
@@ -51491,8 +42613,8 @@ var ts;
             }
         }
         function isInstancePropertyWithoutInitializer(node) {
-            return node.kind === 152 /* PropertyDeclaration */ &&
-                !ts.hasModifier(node, 32 /* Static */ | 128 /* Abstract */) &&
+            return node.kind === 152 &&
+                !ts.hasModifier(node, 32 | 128) &&
                 !node.exclamationToken &&
                 !node.initializer;
         }
@@ -51500,10 +42622,9 @@ var ts;
             var reference = ts.createPropertyAccess(ts.createThis(), propName);
             reference.flowNode = constructor.returnFlowNode;
             var flowType = getFlowTypeOfReference(reference, propType, getOptionalType(propType));
-            return !(getFalsyFlags(flowType) & 8192 /* Undefined */);
+            return !(getFalsyFlags(flowType) & 8192);
         }
         function checkInterfaceDeclaration(node) {
-            // Grammar checking
             if (!checkGrammarDecoratorsAndModifiers(node))
                 checkGrammarInterfaceDeclaration(node);
             checkTypeParameters(node.typeParameters);
@@ -51512,12 +42633,10 @@ var ts;
                 checkExportsOnMergedDeclarations(node);
                 var symbol = getSymbolOfNode(node);
                 checkTypeParameterListsIdentical(symbol);
-                // Only check this symbol once
-                var firstInterfaceDecl = ts.getDeclarationOfKind(symbol, 236 /* InterfaceDeclaration */);
+                var firstInterfaceDecl = ts.getDeclarationOfKind(symbol, 236);
                 if (node === firstInterfaceDecl) {
                     var type = getDeclaredTypeOfSymbol(symbol);
                     var typeWithThis = getTypeWithThisArgument(type);
-                    // run subsequent checks only if first set succeeded
                     if (checkInheritedPropertiesAreIdentical(type, node.name)) {
                         for (var _i = 0, _a = getBaseTypes(type); _i < _a.length; _i++) {
                             var baseType = _a[_i];
@@ -51541,7 +42660,6 @@ var ts;
             }
         }
         function checkTypeAliasDeclaration(node) {
-            // Grammar checking
             checkGrammarDecoratorsAndModifiers(node);
             checkTypeNameIsReserved(node.name, ts.Diagnostics.Type_alias_name_cannot_be_0);
             checkTypeParameters(node.typeParameters);
@@ -51550,8 +42668,8 @@ var ts;
         }
         function computeEnumMemberValues(node) {
             var nodeLinks = getNodeLinks(node);
-            if (!(nodeLinks.flags & 16384 /* EnumValuesComputed */)) {
-                nodeLinks.flags |= 16384 /* EnumValuesComputed */;
+            if (!(nodeLinks.flags & 16384)) {
+                nodeLinks.flags |= 16384;
                 var autoValue = 0;
                 for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
                     var member = _a[_i];
@@ -51574,15 +42692,9 @@ var ts;
             if (member.initializer) {
                 return computeConstantValue(member);
             }
-            // In ambient enum declarations that specify no const modifier, enum member declarations that omit
-            // a value are considered computed members (as opposed to having auto-incremented values).
-            if (member.parent.flags & 4194304 /* Ambient */ && !ts.isConst(member.parent)) {
+            if (member.parent.flags & 4194304 && !ts.isConst(member.parent)) {
                 return undefined;
             }
-            // If the member declaration specifies no value, the member is considered a constant enum member.
-            // If the member is the first member in the enum declaration, it is assigned the value zero.
-            // Otherwise, it is assigned the value of the immediately preceding member plus one, and an error
-            // occurs if the immediately preceding member is not a constant enum member.
             if (autoValue !== undefined) {
                 return autoValue;
             }
@@ -51593,7 +42705,7 @@ var ts;
             var enumKind = getEnumKind(getSymbolOfNode(member.parent));
             var isConstEnum = ts.isConst(member.parent);
             var initializer = member.initializer;
-            var value = enumKind === 1 /* Literal */ && !isLiteralEnumMember(member) ? undefined : evaluate(initializer);
+            var value = enumKind === 1 && !isLiteralEnumMember(member) ? undefined : evaluate(initializer);
             if (value !== undefined) {
                 if (isConstEnum && typeof value === "number" && !isFinite(value)) {
                     error(initializer, isNaN(value) ?
@@ -51601,77 +42713,76 @@ var ts;
                         ts.Diagnostics.const_enum_member_initializer_was_evaluated_to_a_non_finite_value);
                 }
             }
-            else if (enumKind === 1 /* Literal */) {
+            else if (enumKind === 1) {
                 error(initializer, ts.Diagnostics.Computed_values_are_not_permitted_in_an_enum_with_string_valued_members);
                 return 0;
             }
             else if (isConstEnum) {
                 error(initializer, ts.Diagnostics.In_const_enum_declarations_member_initializer_must_be_constant_expression);
             }
-            else if (member.parent.flags & 4194304 /* Ambient */) {
+            else if (member.parent.flags & 4194304) {
                 error(initializer, ts.Diagnostics.In_ambient_enum_declarations_member_initializer_must_be_constant_expression);
             }
             else {
-                // Only here do we need to check that the initializer is assignable to the enum type.
-                checkTypeAssignableTo(checkExpression(initializer), getDeclaredTypeOfSymbol(getSymbolOfNode(member.parent)), initializer, /*headMessage*/ undefined);
+                checkTypeAssignableTo(checkExpression(initializer), getDeclaredTypeOfSymbol(getSymbolOfNode(member.parent)), initializer, undefined);
             }
             return value;
             function evaluate(expr) {
                 switch (expr.kind) {
-                    case 198 /* PrefixUnaryExpression */:
-                        var value_1 = evaluate(expr.operand);
-                        if (typeof value_1 === "number") {
+                    case 198:
+                        var value_2 = evaluate(expr.operand);
+                        if (typeof value_2 === "number") {
                             switch (expr.operator) {
-                                case 37 /* PlusToken */: return value_1;
-                                case 38 /* MinusToken */: return -value_1;
-                                case 52 /* TildeToken */: return ~value_1;
+                                case 37: return value_2;
+                                case 38: return -value_2;
+                                case 52: return ~value_2;
                             }
                         }
                         break;
-                    case 200 /* BinaryExpression */:
+                    case 200:
                         var left = evaluate(expr.left);
                         var right = evaluate(expr.right);
                         if (typeof left === "number" && typeof right === "number") {
                             switch (expr.operatorToken.kind) {
-                                case 49 /* BarToken */: return left | right;
-                                case 48 /* AmpersandToken */: return left & right;
-                                case 46 /* GreaterThanGreaterThanToken */: return left >> right;
-                                case 47 /* GreaterThanGreaterThanGreaterThanToken */: return left >>> right;
-                                case 45 /* LessThanLessThanToken */: return left << right;
-                                case 50 /* CaretToken */: return left ^ right;
-                                case 39 /* AsteriskToken */: return left * right;
-                                case 41 /* SlashToken */: return left / right;
-                                case 37 /* PlusToken */: return left + right;
-                                case 38 /* MinusToken */: return left - right;
-                                case 42 /* PercentToken */: return left % right;
-                                case 40 /* AsteriskAsteriskToken */: return Math.pow(left, right);
+                                case 49: return left | right;
+                                case 48: return left & right;
+                                case 46: return left >> right;
+                                case 47: return left >>> right;
+                                case 45: return left << right;
+                                case 50: return left ^ right;
+                                case 39: return left * right;
+                                case 41: return left / right;
+                                case 37: return left + right;
+                                case 38: return left - right;
+                                case 42: return left % right;
+                                case 40: return Math.pow(left, right);
                             }
                         }
-                        else if (typeof left === "string" && typeof right === "string" && expr.operatorToken.kind === 37 /* PlusToken */) {
+                        else if (typeof left === "string" && typeof right === "string" && expr.operatorToken.kind === 37) {
                             return left + right;
                         }
                         break;
-                    case 9 /* StringLiteral */:
+                    case 9:
                         return expr.text;
-                    case 8 /* NumericLiteral */:
+                    case 8:
                         checkGrammarNumericLiteral(expr);
                         return +expr.text;
-                    case 191 /* ParenthesizedExpression */:
+                    case 191:
                         return evaluate(expr.expression);
-                    case 71 /* Identifier */:
+                    case 71:
                         var identifier = expr;
                         if (isInfinityOrNaNString(identifier.escapedText)) {
                             return +(identifier.escapedText);
                         }
                         return ts.nodeIsMissing(expr) ? 0 : evaluateEnumMember(expr, getSymbolOfNode(member.parent), identifier.escapedText);
-                    case 186 /* ElementAccessExpression */:
-                    case 185 /* PropertyAccessExpression */:
+                    case 186:
+                    case 185:
                         var ex = expr;
                         if (isConstantMemberAccess(ex)) {
                             var type = getTypeOfExpression(ex.expression);
-                            if (type.symbol && type.symbol.flags & 384 /* Enum */) {
+                            if (type.symbol && type.symbol.flags & 384) {
                                 var name = void 0;
-                                if (ex.kind === 185 /* PropertyAccessExpression */) {
+                                if (ex.kind === 185) {
                                     name = ex.name.escapedText;
                                 }
                                 else {
@@ -51702,16 +42813,15 @@ var ts;
             }
         }
         function isConstantMemberAccess(node) {
-            return node.kind === 71 /* Identifier */ ||
-                node.kind === 185 /* PropertyAccessExpression */ && isConstantMemberAccess(node.expression) ||
-                node.kind === 186 /* ElementAccessExpression */ && isConstantMemberAccess(node.expression) &&
-                    node.argumentExpression.kind === 9 /* StringLiteral */;
+            return node.kind === 71 ||
+                node.kind === 185 && isConstantMemberAccess(node.expression) ||
+                node.kind === 186 && isConstantMemberAccess(node.expression) &&
+                    node.argumentExpression.kind === 9;
         }
         function checkEnumDeclaration(node) {
             if (!produceDiagnostics) {
                 return;
             }
-            // Grammar checking
             checkGrammarDecoratorsAndModifiers(node);
             checkTypeNameIsReserved(node.name, ts.Diagnostics.Enum_name_cannot_be_0);
             checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
@@ -51719,20 +42829,13 @@ var ts;
             checkExportsOnMergedDeclarations(node);
             computeEnumMemberValues(node);
             var enumIsConst = ts.isConst(node);
-            if (compilerOptions.isolatedModules && enumIsConst && node.flags & 4194304 /* Ambient */) {
+            if (compilerOptions.isolatedModules && enumIsConst && node.flags & 4194304) {
                 error(node.name, ts.Diagnostics.Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided);
             }
-            // Spec 2014 - Section 9.3:
-            // It isn't possible for one enum declaration to continue the automatic numbering sequence of another,
-            // and when an enum type has multiple declarations, only one declaration is permitted to omit a value
-            // for the first member.
-            //
-            // Only perform this check once per symbol
             var enumSymbol = getSymbolOfNode(node);
             var firstDeclaration = ts.getDeclarationOfKind(enumSymbol, node.kind);
             if (node === firstDeclaration) {
                 if (enumSymbol.declarations.length > 1) {
-                    // check that const is placed\omitted on all enum declarations
                     ts.forEach(enumSymbol.declarations, function (decl) {
                         if (ts.isConstEnumDeclaration(decl) !== enumIsConst) {
                             error(ts.getNameOfDeclaration(decl), ts.Diagnostics.Enum_declarations_must_all_be_const_or_non_const);
@@ -51741,8 +42844,7 @@ var ts;
                 }
                 var seenEnumMissingInitialInitializer_1 = false;
                 ts.forEach(enumSymbol.declarations, function (declaration) {
-                    // return true if we hit a violation of the rule, false otherwise
-                    if (declaration.kind !== 238 /* EnumDeclaration */) {
+                    if (declaration.kind !== 238) {
                         return false;
                     }
                     var enumDeclaration = declaration;
@@ -51763,11 +42865,11 @@ var ts;
         }
         function getFirstNonAmbientClassOrFunctionDeclaration(symbol) {
             var declarations = symbol.declarations;
-            for (var _i = 0, declarations_7 = declarations; _i < declarations_7.length; _i++) {
-                var declaration = declarations_7[_i];
-                if ((declaration.kind === 235 /* ClassDeclaration */ ||
-                    (declaration.kind === 234 /* FunctionDeclaration */ && ts.nodeIsPresent(declaration.body))) &&
-                    !(declaration.flags & 4194304 /* Ambient */)) {
+            for (var _i = 0, declarations_8 = declarations; _i < declarations_8.length; _i++) {
+                var declaration = declarations_8[_i];
+                if ((declaration.kind === 235 ||
+                    (declaration.kind === 234 && ts.nodeIsPresent(declaration.body))) &&
+                    !(declaration.flags & 4194304)) {
                     return declaration;
                 }
             }
@@ -51788,9 +42890,8 @@ var ts;
         }
         function checkModuleDeclaration(node) {
             if (produceDiagnostics) {
-                // Grammar checking
                 var isGlobalAugmentation = ts.isGlobalScopeAugmentation(node);
-                var inAmbientContext = node.flags & 4194304 /* Ambient */;
+                var inAmbientContext = node.flags & 4194304;
                 if (isGlobalAugmentation && !inAmbientContext) {
                     error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambient_context);
                 }
@@ -51799,11 +42900,10 @@ var ts;
                     ? ts.Diagnostics.An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file
                     : ts.Diagnostics.A_namespace_declaration_is_only_allowed_in_a_namespace_or_module;
                 if (checkGrammarModuleElementContext(node, contextErrorMessage)) {
-                    // If we hit a module declaration in an illegal context, just bail out to avoid cascading errors.
                     return;
                 }
                 if (!checkGrammarDecoratorsAndModifiers(node)) {
-                    if (!inAmbientContext && node.name.kind === 9 /* StringLiteral */) {
+                    if (!inAmbientContext && node.name.kind === 9) {
                         grammarErrorOnNode(node.name, ts.Diagnostics.Only_ambient_modules_can_use_quoted_names);
                     }
                 }
@@ -51813,8 +42913,7 @@ var ts;
                 }
                 checkExportsOnMergedDeclarations(node);
                 var symbol = getSymbolOfNode(node);
-                // The following checks only apply on a non-ambient instantiated module declaration.
-                if (symbol.flags & 512 /* ValueModule */
+                if (symbol.flags & 512
                     && symbol.declarations.length > 1
                     && !inAmbientContext
                     && isInstantiatedModule(node, !!compilerOptions.preserveConstEnums || !!compilerOptions.isolatedModules)) {
@@ -51827,22 +42926,15 @@ var ts;
                             error(node.name, ts.Diagnostics.A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged);
                         }
                     }
-                    // if the module merges with a class declaration in the same lexical scope,
-                    // we need to track this to ensure the correct emit.
-                    var mergedClass = ts.getDeclarationOfKind(symbol, 235 /* ClassDeclaration */);
+                    var mergedClass = ts.getDeclarationOfKind(symbol, 235);
                     if (mergedClass &&
                         inSameLexicalScope(node, mergedClass)) {
-                        getNodeLinks(node).flags |= 32768 /* LexicalModuleMergesWithClass */;
+                        getNodeLinks(node).flags |= 32768;
                     }
                 }
                 if (isAmbientExternalModule) {
                     if (ts.isExternalModuleAugmentation(node)) {
-                        // body of the augmentation should be checked for consistency only if augmentation was applied to its target (either global scope or module)
-                        // otherwise we'll be swamped in cascading errors.
-                        // We can detect if augmentation was applied using following rules:
-                        // - augmentation for a global scope is always applied
-                        // - augmentation for some external module is applied if symbol for augmentation is merged (it was combined with target module).
-                        var checkBody = isGlobalAugmentation || (getSymbolOfNode(node).flags & 33554432 /* Transient */);
+                        var checkBody = isGlobalAugmentation || (getSymbolOfNode(node).flags & 33554432);
                         if (checkBody && node.body) {
                             for (var _i = 0, _a = node.body.statements; _i < _a.length; _i++) {
                                 var statement = _a[_i];
@@ -51863,8 +42955,6 @@ var ts;
                             error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations);
                         }
                         else {
-                            // Node is not an augmentation and is not located on the script level.
-                            // This means that this is declaration of ambient module that is located in other module or namespace which is prohibited.
                             error(node.name, ts.Diagnostics.Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces);
                         }
                     }
@@ -51879,51 +42969,43 @@ var ts;
         }
         function checkModuleAugmentationElement(node, isGlobalAugmentation) {
             switch (node.kind) {
-                case 214 /* VariableStatement */:
-                    // error each individual name in variable statement instead of marking the entire variable statement
+                case 214:
                     for (var _i = 0, _a = node.declarationList.declarations; _i < _a.length; _i++) {
                         var decl = _a[_i];
                         checkModuleAugmentationElement(decl, isGlobalAugmentation);
                     }
                     break;
-                case 249 /* ExportAssignment */:
-                case 250 /* ExportDeclaration */:
+                case 249:
+                case 250:
                     grammarErrorOnFirstToken(node, ts.Diagnostics.Exports_and_export_assignments_are_not_permitted_in_module_augmentations);
                     break;
-                case 243 /* ImportEqualsDeclaration */:
-                case 244 /* ImportDeclaration */:
+                case 243:
+                case 244:
                     grammarErrorOnFirstToken(node, ts.Diagnostics.Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_module);
                     break;
-                case 182 /* BindingElement */:
-                case 232 /* VariableDeclaration */:
+                case 182:
+                case 232:
                     var name = node.name;
                     if (ts.isBindingPattern(name)) {
                         for (var _b = 0, _c = name.elements; _b < _c.length; _b++) {
                             var el = _c[_b];
-                            // mark individual names in binding pattern
                             checkModuleAugmentationElement(el, isGlobalAugmentation);
                         }
                         break;
                     }
-                // falls through
-                case 235 /* ClassDeclaration */:
-                case 238 /* EnumDeclaration */:
-                case 234 /* FunctionDeclaration */:
-                case 236 /* InterfaceDeclaration */:
-                case 239 /* ModuleDeclaration */:
-                case 237 /* TypeAliasDeclaration */:
+                case 235:
+                case 238:
+                case 234:
+                case 236:
+                case 239:
+                case 237:
                     if (isGlobalAugmentation) {
                         return;
                     }
                     var symbol = getSymbolOfNode(node);
                     if (symbol) {
-                        // module augmentations cannot introduce new names on the top level scope of the module
-                        // this is done it two steps
-                        // 1. quick check - if symbol for node is not merged - this is local symbol to this augmentation - report error
-                        // 2. main check - report error if value declaration of the parent symbol is module augmentation)
-                        var reportError = !(symbol.flags & 33554432 /* Transient */);
+                        var reportError = !(symbol.flags & 33554432);
                         if (!reportError) {
-                            // symbol should not originate in augmentation
                             reportError = ts.isExternalModuleAugmentation(symbol.parent.declarations[0]);
                         }
                     }
@@ -51932,45 +43014,38 @@ var ts;
         }
         function getFirstIdentifier(node) {
             switch (node.kind) {
-                case 71 /* Identifier */:
+                case 71:
                     return node;
-                case 146 /* QualifiedName */:
+                case 146:
                     do {
                         node = node.left;
-                    } while (node.kind !== 71 /* Identifier */);
+                    } while (node.kind !== 71);
                     return node;
-                case 185 /* PropertyAccessExpression */:
+                case 185:
                     do {
                         node = node.expression;
-                    } while (node.kind !== 71 /* Identifier */);
+                    } while (node.kind !== 71);
                     return node;
             }
         }
         function checkExternalImportOrExportDeclaration(node) {
             var moduleName = ts.getExternalModuleName(node);
             if (!moduleName || ts.nodeIsMissing(moduleName)) {
-                // Should be a parse error.
                 return false;
             }
             if (!ts.isStringLiteral(moduleName)) {
                 error(moduleName, ts.Diagnostics.String_literal_expected);
                 return false;
             }
-            var inAmbientExternalModule = node.parent.kind === 240 /* ModuleBlock */ && ts.isAmbientModule(node.parent.parent);
-            if (node.parent.kind !== 274 /* SourceFile */ && !inAmbientExternalModule) {
-                error(moduleName, node.kind === 250 /* ExportDeclaration */ ?
+            var inAmbientExternalModule = node.parent.kind === 240 && ts.isAmbientModule(node.parent.parent);
+            if (node.parent.kind !== 274 && !inAmbientExternalModule) {
+                error(moduleName, node.kind === 250 ?
                     ts.Diagnostics.Export_declarations_are_not_permitted_in_a_namespace :
                     ts.Diagnostics.Import_declarations_in_a_namespace_cannot_reference_a_module);
                 return false;
             }
             if (inAmbientExternalModule && ts.isExternalModuleNameRelative(moduleName.text)) {
-                // we have already reported errors on top level imports\exports in external module augmentations in checkModuleDeclaration
-                // no need to do this again.
                 if (!isTopLevelInExternalModuleAugmentation(node)) {
-                    // TypeScript 1.0 spec (April 2013): 12.1.6
-                    // An ExternalImportDeclaration in an AmbientExternalModuleDeclaration may reference
-                    // other external modules only through top - level external module names.
-                    // Relative external module names are not permitted.
                     error(node, ts.Diagnostics.Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relative_module_name);
                     return false;
                 }
@@ -51981,26 +43056,19 @@ var ts;
             var symbol = getSymbolOfNode(node);
             var target = resolveAlias(symbol);
             if (target !== unknownSymbol) {
-                // For external modules symbol represent local symbol for an alias.
-                // This local symbol will merge any other local declarations (excluding other aliases)
-                // and symbol.flags will contains combined representation for all merged declaration.
-                // Based on symbol.flags we can compute a set of excluded meanings (meaning that resolved alias should not have,
-                // otherwise it will conflict with some local declaration). Note that in addition to normal flags we include matching SymbolFlags.Export*
-                // in order to prevent collisions with declarations that were exported from the current module (they still contribute to local names).
-                var excludedMeanings = (symbol.flags & (67216319 /* Value */ | 1048576 /* ExportValue */) ? 67216319 /* Value */ : 0) |
-                    (symbol.flags & 67901928 /* Type */ ? 67901928 /* Type */ : 0) |
-                    (symbol.flags & 1920 /* Namespace */ ? 1920 /* Namespace */ : 0);
+                var excludedMeanings = (symbol.flags & (67216319 | 1048576) ? 67216319 : 0) |
+                    (symbol.flags & 67901928 ? 67901928 : 0) |
+                    (symbol.flags & 1920 ? 1920 : 0);
                 if (target.flags & excludedMeanings) {
-                    var message = node.kind === 252 /* ExportSpecifier */ ?
+                    var message = node.kind === 252 ?
                         ts.Diagnostics.Export_declaration_conflicts_with_exported_declaration_of_0 :
                         ts.Diagnostics.Import_declaration_conflicts_with_local_declaration_of_0;
                     error(node, message, symbolToString(symbol));
                 }
-                // Don't allow to re-export something with no value side when `--isolatedModules` is set.
                 if (compilerOptions.isolatedModules
-                    && node.kind === 252 /* ExportSpecifier */
-                    && !(target.flags & 67216319 /* Value */)
-                    && !(node.flags & 4194304 /* Ambient */)) {
+                    && node.kind === 252
+                    && !(target.flags & 67216319)
+                    && !(node.flags & 4194304)) {
                     error(node, ts.Diagnostics.Cannot_re_export_a_type_when_the_isolatedModules_flag_is_provided);
                 }
             }
@@ -52012,7 +43080,6 @@ var ts;
         }
         function checkImportDeclaration(node) {
             if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_import_declaration_can_only_be_used_in_a_namespace_or_module)) {
-                // If we hit an import declaration in an illegal context, just bail out to avoid cascading errors.
                 return;
             }
             if (!checkGrammarDecoratorsAndModifiers(node) && ts.hasModifiers(node)) {
@@ -52025,7 +43092,7 @@ var ts;
                         checkImportBinding(importClause);
                     }
                     if (importClause.namedBindings) {
-                        if (importClause.namedBindings.kind === 246 /* NamespaceImport */) {
+                        if (importClause.namedBindings.kind === 246) {
                             checkImportBinding(importClause.namedBindings);
                         }
                         else {
@@ -52040,33 +43107,30 @@ var ts;
         }
         function checkImportEqualsDeclaration(node) {
             if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_import_declaration_can_only_be_used_in_a_namespace_or_module)) {
-                // If we hit an import declaration in an illegal context, just bail out to avoid cascading errors.
                 return;
             }
             checkGrammarDecoratorsAndModifiers(node);
             if (ts.isInternalModuleImportEqualsDeclaration(node) || checkExternalImportOrExportDeclaration(node)) {
                 checkImportBinding(node);
-                if (ts.hasModifier(node, 1 /* Export */)) {
+                if (ts.hasModifier(node, 1)) {
                     markExportAsReferenced(node);
                 }
-                if (node.moduleReference.kind !== 254 /* ExternalModuleReference */) {
+                if (node.moduleReference.kind !== 254) {
                     var target = resolveAlias(getSymbolOfNode(node));
                     if (target !== unknownSymbol) {
-                        if (target.flags & 67216319 /* Value */) {
-                            // Target is a value symbol, check that it is not hidden by a local declaration with the same name
+                        if (target.flags & 67216319) {
                             var moduleName = getFirstIdentifier(node.moduleReference);
-                            if (!(resolveEntityName(moduleName, 67216319 /* Value */ | 1920 /* Namespace */).flags & 1920 /* Namespace */)) {
+                            if (!(resolveEntityName(moduleName, 67216319 | 1920).flags & 1920)) {
                                 error(moduleName, ts.Diagnostics.Module_0_is_hidden_by_a_local_declaration_with_the_same_name, ts.declarationNameToString(moduleName));
                             }
                         }
-                        if (target.flags & 67901928 /* Type */) {
+                        if (target.flags & 67901928) {
                             checkTypeNameIsReserved(node.name, ts.Diagnostics.Import_name_cannot_be_0);
                         }
                     }
                 }
                 else {
-                    if (moduleKind >= ts.ModuleKind.ES2015 && !(node.flags & 4194304 /* Ambient */)) {
-                        // Import equals declaration is deprecated in es6 or above
+                    if (moduleKind >= ts.ModuleKind.ES2015 && !(node.flags & 4194304)) {
                         grammarErrorOnNode(node, ts.Diagnostics.Import_assignment_cannot_be_used_when_targeting_ECMAScript_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead);
                     }
                 }
@@ -52074,7 +43138,6 @@ var ts;
         }
         function checkExportDeclaration(node) {
             if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_export_declaration_can_only_be_used_in_a_module)) {
-                // If we hit an export in an illegal context, just bail out to avoid cascading errors.
                 return;
             }
             if (!checkGrammarDecoratorsAndModifiers(node) && ts.hasModifiers(node)) {
@@ -52082,30 +43145,27 @@ var ts;
             }
             if (!node.moduleSpecifier || checkExternalImportOrExportDeclaration(node)) {
                 if (node.exportClause) {
-                    // export { x, y }
-                    // export { x, y } from "foo"
                     ts.forEach(node.exportClause.elements, checkExportSpecifier);
-                    var inAmbientExternalModule = node.parent.kind === 240 /* ModuleBlock */ && ts.isAmbientModule(node.parent.parent);
-                    var inAmbientNamespaceDeclaration = !inAmbientExternalModule && node.parent.kind === 240 /* ModuleBlock */ &&
-                        !node.moduleSpecifier && node.flags & 4194304 /* Ambient */;
-                    if (node.parent.kind !== 274 /* SourceFile */ && !inAmbientExternalModule && !inAmbientNamespaceDeclaration) {
+                    var inAmbientExternalModule = node.parent.kind === 240 && ts.isAmbientModule(node.parent.parent);
+                    var inAmbientNamespaceDeclaration = !inAmbientExternalModule && node.parent.kind === 240 &&
+                        !node.moduleSpecifier && node.flags & 4194304;
+                    if (node.parent.kind !== 274 && !inAmbientExternalModule && !inAmbientNamespaceDeclaration) {
                         error(node, ts.Diagnostics.Export_declarations_are_not_permitted_in_a_namespace);
                     }
                 }
                 else {
-                    // export * from "foo"
                     var moduleSymbol_2 = resolveExternalModuleName(node, node.moduleSpecifier);
                     if (moduleSymbol_2 && hasExportAssignmentSymbol(moduleSymbol_2)) {
                         error(node.moduleSpecifier, ts.Diagnostics.Module_0_uses_export_and_cannot_be_used_with_export_Asterisk, symbolToString(moduleSymbol_2));
                     }
                     if (moduleKind !== ts.ModuleKind.System && moduleKind !== ts.ModuleKind.ES2015 && moduleKind !== ts.ModuleKind.ESNext) {
-                        checkExternalEmitHelpers(node, 32768 /* ExportStar */);
+                        checkExternalEmitHelpers(node, 32768);
                     }
                 }
             }
         }
         function checkGrammarModuleElementContext(node, errorMessage) {
-            var isInAppropriateContext = node.parent.kind === 274 /* SourceFile */ || node.parent.kind === 240 /* ModuleBlock */ || node.parent.kind === 239 /* ModuleDeclaration */;
+            var isInAppropriateContext = node.parent.kind === 274 || node.parent.kind === 240 || node.parent.kind === 239;
             if (!isInAppropriateContext) {
                 grammarErrorOnFirstToken(node, errorMessage);
             }
@@ -52114,13 +43174,11 @@ var ts;
         function checkExportSpecifier(node) {
             checkAliasSymbol(node);
             if (compilerOptions.declaration) {
-                collectLinkedAliases(node.propertyName || node.name, /*setVisibility*/ true);
+                collectLinkedAliases(node.propertyName || node.name, true);
             }
             if (!node.parent.parent.moduleSpecifier) {
                 var exportedName = node.propertyName || node.name;
-                // find immediate value referenced by exported name (SymbolFlags.Alias is set so we don't chase down aliases)
-                var symbol = resolveName(exportedName, exportedName.escapedText, 67216319 /* Value */ | 67901928 /* Type */ | 1920 /* Namespace */ | 2097152 /* Alias */, 
-                /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined, /*isUse*/ true);
+                var symbol = resolveName(exportedName, exportedName.escapedText, 67216319 | 67901928 | 1920 | 2097152, undefined, undefined, true);
                 if (symbol && (symbol === undefinedSymbol || isGlobalSourceFile(getDeclarationContainer(symbol.declarations[0])))) {
                     error(exportedName, ts.Diagnostics.Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module, ts.idText(exportedName));
                 }
@@ -52131,11 +43189,10 @@ var ts;
         }
         function checkExportAssignment(node) {
             if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_export_assignment_can_only_be_used_in_a_module)) {
-                // If we hit an export assignment in an illegal context, just bail out to avoid cascading errors.
                 return;
             }
-            var container = node.parent.kind === 274 /* SourceFile */ ? node.parent : node.parent.parent;
-            if (container.kind === 239 /* ModuleDeclaration */ && !ts.isAmbientModule(container)) {
+            var container = node.parent.kind === 274 ? node.parent : node.parent.parent;
+            if (container.kind === 239 && !ts.isAmbientModule(container)) {
                 if (node.isExportEquals) {
                     error(node, ts.Diagnostics.An_export_assignment_cannot_be_used_in_a_namespace);
                 }
@@ -52144,30 +43201,27 @@ var ts;
                 }
                 return;
             }
-            // Grammar checking
             if (!checkGrammarDecoratorsAndModifiers(node) && ts.hasModifiers(node)) {
                 grammarErrorOnFirstToken(node, ts.Diagnostics.An_export_assignment_cannot_have_modifiers);
             }
-            if (node.expression.kind === 71 /* Identifier */) {
+            if (node.expression.kind === 71) {
                 markExportAsReferenced(node);
                 if (compilerOptions.declaration) {
-                    collectLinkedAliases(node.expression, /*setVisibility*/ true);
+                    collectLinkedAliases(node.expression, true);
                 }
             }
             else {
                 checkExpressionCached(node.expression);
             }
             checkExternalModuleExports(container);
-            if ((node.flags & 4194304 /* Ambient */) && !ts.isEntityNameExpression(node.expression)) {
+            if ((node.flags & 4194304) && !ts.isEntityNameExpression(node.expression)) {
                 grammarErrorOnNode(node.expression, ts.Diagnostics.The_expression_of_an_export_assignment_must_be_an_identifier_or_qualified_name_in_an_ambient_context);
             }
-            if (node.isExportEquals && !(node.flags & 4194304 /* Ambient */)) {
+            if (node.isExportEquals && !(node.flags & 4194304)) {
                 if (moduleKind >= ts.ModuleKind.ES2015) {
-                    // export assignment is not supported in es6 modules
                     grammarErrorOnNode(node, ts.Diagnostics.Export_assignment_cannot_be_used_when_targeting_ECMAScript_modules_Consider_using_export_default_or_another_module_format_instead);
                 }
                 else if (moduleKind === ts.ModuleKind.System) {
-                    // system modules does not support export assignment
                     grammarErrorOnNode(node, ts.Diagnostics.Export_assignment_is_not_supported_when_module_flag_is_system);
                 }
             }
@@ -52186,28 +43240,23 @@ var ts;
                         error(declaration, ts.Diagnostics.An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements);
                     }
                 }
-                // Checks for export * conflicts
-                var exports = getExportsOfModule(moduleSymbol);
-                if (exports) {
-                    exports.forEach(function (_a, id) {
+                var exports_1 = getExportsOfModule(moduleSymbol);
+                if (exports_1) {
+                    exports_1.forEach(function (_a, id) {
                         var declarations = _a.declarations, flags = _a.flags;
                         if (id === "__export") {
                             return;
                         }
-                        // ECMA262: 15.2.1.1 It is a Syntax Error if the ExportedNames of ModuleItemList contains any duplicate entries.
-                        // (TS Exceptions: namespaces, function overloads, enums, and interfaces)
-                        if (flags & (1920 /* Namespace */ | 64 /* Interface */ | 384 /* Enum */)) {
+                        if (flags & (1920 | 64 | 384)) {
                             return;
                         }
                         var exportedDeclarationsCount = ts.countWhere(declarations, isNotOverloadAndNotAccessor);
-                        if (flags & 524288 /* TypeAlias */ && exportedDeclarationsCount <= 2) {
-                            // it is legal to merge type alias with other values
-                            // so count should be either 1 (just type alias) or 2 (type alias + merged value)
+                        if (flags & 524288 && exportedDeclarationsCount <= 2) {
                             return;
                         }
                         if (exportedDeclarationsCount > 1) {
-                            for (var _i = 0, declarations_8 = declarations; _i < declarations_8.length; _i++) {
-                                var declaration = declarations_8[_i];
+                            for (var _i = 0, declarations_9 = declarations; _i < declarations_9.length; _i++) {
+                                var declaration = declarations_9[_i];
                                 if (isNotOverload(declaration)) {
                                     diagnostics.add(ts.createDiagnosticForNode(declaration, ts.Diagnostics.Cannot_redeclare_exported_variable_0, ts.unescapeLeadingUnderscores(id)));
                                 }
@@ -52219,11 +43268,10 @@ var ts;
             }
         }
         function isNotAccessor(declaration) {
-            // Accessors check for their own matching duplicates, and in contexts where they are valid, there are already duplicate identifier checks
             return !ts.isAccessor(declaration);
         }
         function isNotOverload(declaration) {
-            return (declaration.kind !== 234 /* FunctionDeclaration */ && declaration.kind !== 154 /* MethodDeclaration */) ||
+            return (declaration.kind !== 234 && declaration.kind !== 154) ||
                 !!declaration.body;
         }
         function checkSourceElement(node) {
@@ -52238,153 +43286,150 @@ var ts;
             }
             var kind = node.kind;
             if (cancellationToken) {
-                // Only bother checking on a few construct kinds.  We don't want to be excessively
-                // hitting the cancellation token on every node we check.
                 switch (kind) {
-                    case 239 /* ModuleDeclaration */:
-                    case 235 /* ClassDeclaration */:
-                    case 236 /* InterfaceDeclaration */:
-                    case 234 /* FunctionDeclaration */:
+                    case 239:
+                    case 235:
+                    case 236:
+                    case 234:
                         cancellationToken.throwIfCancellationRequested();
                 }
             }
             switch (kind) {
-                case 148 /* TypeParameter */:
+                case 148:
                     return checkTypeParameter(node);
-                case 149 /* Parameter */:
+                case 149:
                     return checkParameter(node);
-                case 152 /* PropertyDeclaration */:
-                case 151 /* PropertySignature */:
+                case 152:
+                case 151:
                     return checkPropertyDeclaration(node);
-                case 163 /* FunctionType */:
-                case 164 /* ConstructorType */:
-                case 158 /* CallSignature */:
-                case 159 /* ConstructSignature */:
-                case 160 /* IndexSignature */:
+                case 163:
+                case 164:
+                case 158:
+                case 159:
+                case 160:
                     return checkSignatureDeclaration(node);
-                case 154 /* MethodDeclaration */:
-                case 153 /* MethodSignature */:
+                case 154:
+                case 153:
                     return checkMethodDeclaration(node);
-                case 155 /* Constructor */:
+                case 155:
                     return checkConstructorDeclaration(node);
-                case 156 /* GetAccessor */:
-                case 157 /* SetAccessor */:
+                case 156:
+                case 157:
                     return checkAccessorDeclaration(node);
-                case 162 /* TypeReference */:
+                case 162:
                     return checkTypeReferenceNode(node);
-                case 161 /* TypePredicate */:
+                case 161:
                     return checkTypePredicate(node);
-                case 165 /* TypeQuery */:
+                case 165:
                     return checkTypeQuery(node);
-                case 166 /* TypeLiteral */:
+                case 166:
                     return checkTypeLiteral(node);
-                case 167 /* ArrayType */:
+                case 167:
                     return checkArrayType(node);
-                case 168 /* TupleType */:
+                case 168:
                     return checkTupleType(node);
-                case 169 /* UnionType */:
-                case 170 /* IntersectionType */:
+                case 169:
+                case 170:
                     return checkUnionOrIntersectionType(node);
-                case 173 /* ParenthesizedType */:
+                case 173:
                     return checkSourceElement(node.type);
-                case 175 /* TypeOperator */:
+                case 175:
                     return checkTypeOperator(node);
-                case 171 /* ConditionalType */:
+                case 171:
                     return checkConditionalType(node);
-                case 172 /* InferType */:
+                case 172:
                     return checkInferType(node);
-                case 179 /* ImportType */:
+                case 179:
                     return checkImportType(node);
-                case 290 /* JSDocAugmentsTag */:
+                case 290:
                     return checkJSDocAugmentsTag(node);
-                case 297 /* JSDocTypedefTag */:
-                case 292 /* JSDocCallbackTag */:
+                case 297:
+                case 292:
                     return checkJSDocTypeAliasTag(node);
-                case 293 /* JSDocParameterTag */:
+                case 293:
                     return checkJSDocParameterTag(node);
-                case 284 /* JSDocFunctionType */:
+                case 284:
                     checkSignatureDeclaration(node);
-                // falls through
-                case 282 /* JSDocNonNullableType */:
-                case 281 /* JSDocNullableType */:
-                case 279 /* JSDocAllType */:
-                case 280 /* JSDocUnknownType */:
-                case 287 /* JSDocTypeLiteral */:
+                case 282:
+                case 281:
+                case 279:
+                case 280:
+                case 287:
                     checkJSDocTypeIsInJsFile(node);
                     ts.forEachChild(node, checkSourceElement);
                     return;
-                case 285 /* JSDocVariadicType */:
+                case 285:
                     checkJSDocVariadicType(node);
                     return;
-                case 278 /* JSDocTypeExpression */:
+                case 278:
                     return checkSourceElement(node.type);
-                case 176 /* IndexedAccessType */:
+                case 176:
                     return checkIndexedAccessType(node);
-                case 177 /* MappedType */:
+                case 177:
                     return checkMappedType(node);
-                case 234 /* FunctionDeclaration */:
+                case 234:
                     return checkFunctionDeclaration(node);
-                case 213 /* Block */:
-                case 240 /* ModuleBlock */:
+                case 213:
+                case 240:
                     return checkBlock(node);
-                case 214 /* VariableStatement */:
+                case 214:
                     return checkVariableStatement(node);
-                case 216 /* ExpressionStatement */:
+                case 216:
                     return checkExpressionStatement(node);
-                case 217 /* IfStatement */:
+                case 217:
                     return checkIfStatement(node);
-                case 218 /* DoStatement */:
+                case 218:
                     return checkDoStatement(node);
-                case 219 /* WhileStatement */:
+                case 219:
                     return checkWhileStatement(node);
-                case 220 /* ForStatement */:
+                case 220:
                     return checkForStatement(node);
-                case 221 /* ForInStatement */:
+                case 221:
                     return checkForInStatement(node);
-                case 222 /* ForOfStatement */:
+                case 222:
                     return checkForOfStatement(node);
-                case 223 /* ContinueStatement */:
-                case 224 /* BreakStatement */:
+                case 223:
+                case 224:
                     return checkBreakOrContinueStatement(node);
-                case 225 /* ReturnStatement */:
+                case 225:
                     return checkReturnStatement(node);
-                case 226 /* WithStatement */:
+                case 226:
                     return checkWithStatement(node);
-                case 227 /* SwitchStatement */:
+                case 227:
                     return checkSwitchStatement(node);
-                case 228 /* LabeledStatement */:
+                case 228:
                     return checkLabeledStatement(node);
-                case 229 /* ThrowStatement */:
+                case 229:
                     return checkThrowStatement(node);
-                case 230 /* TryStatement */:
+                case 230:
                     return checkTryStatement(node);
-                case 232 /* VariableDeclaration */:
+                case 232:
                     return checkVariableDeclaration(node);
-                case 182 /* BindingElement */:
+                case 182:
                     return checkBindingElement(node);
-                case 235 /* ClassDeclaration */:
+                case 235:
                     return checkClassDeclaration(node);
-                case 236 /* InterfaceDeclaration */:
+                case 236:
                     return checkInterfaceDeclaration(node);
-                case 237 /* TypeAliasDeclaration */:
+                case 237:
                     return checkTypeAliasDeclaration(node);
-                case 238 /* EnumDeclaration */:
+                case 238:
                     return checkEnumDeclaration(node);
-                case 239 /* ModuleDeclaration */:
+                case 239:
                     return checkModuleDeclaration(node);
-                case 244 /* ImportDeclaration */:
+                case 244:
                     return checkImportDeclaration(node);
-                case 243 /* ImportEqualsDeclaration */:
+                case 243:
                     return checkImportEqualsDeclaration(node);
-                case 250 /* ExportDeclaration */:
+                case 250:
                     return checkExportDeclaration(node);
-                case 249 /* ExportAssignment */:
+                case 249:
                     return checkExportAssignment(node);
-                case 215 /* EmptyStatement */:
-                case 231 /* DebuggerStatement */:
+                case 215:
+                case 231:
                     checkGrammarStatementInAmbientContext(node);
                     return;
-                case 253 /* MissingDeclaration */:
+                case 253:
                     return checkMissingDeclaration(node);
             }
         }
@@ -52396,7 +43441,6 @@ var ts;
         function checkJSDocVariadicType(node) {
             checkJSDocTypeIsInJsFile(node);
             checkSourceElement(node.type);
-            // Only legal location is in the *last* parameter tag or last parameter of a JSDoc function.
             var parent = node.parent;
             if (ts.isParameter(parent) && ts.isJSDocFunctionType(parent.parent)) {
                 if (ts.last(parent.parent.parameters) !== parent) {
@@ -52414,7 +43458,6 @@ var ts;
             }
             var param = ts.getParameterSymbolFromJSDoc(paramTag);
             if (!param) {
-                // We will error in `checkJSDocParameterTag`.
                 return;
             }
             var host = ts.getHostSignatureFromJSDoc(paramTag);
@@ -52427,16 +43470,8 @@ var ts;
             var parent = node.parent;
             var paramTag = node.parent.parent;
             if (ts.isJSDocTypeExpression(node.parent) && ts.isJSDocParameterTag(paramTag)) {
-                // Else we will add a diagnostic, see `checkJSDocVariadicType`.
                 var host_1 = ts.getHostSignatureFromJSDoc(paramTag);
                 if (host_1) {
-                    /*
-                    Only return an array type if the corresponding parameter is marked as a rest parameter, or if there are no parameters.
-                    So in the following situation we will not create an array type:
-                        /** @param {...number} a * /
-                        function f(a) {}
-                    Because `a` will just be of type `number | undefined`. A synthetic `...args` will also be added, which *will* get an array type.
-                    */
                     var lastParamDeclaration = ts.lastOrUndefined(host_1.parameters);
                     var symbol = ts.getParameterSymbolFromJSDoc(paramTag);
                     if (!lastParamDeclaration ||
@@ -52450,15 +43485,6 @@ var ts;
             }
             return addOptionality(type);
         }
-        // Function and class expression bodies are checked after all statements in the enclosing body. This is
-        // to ensure constructs like the following are permitted:
-        //     const foo = function () {
-        //        const s = foo();
-        //        return "hello";
-        //     }
-        // Here, performing a full type check of the body of the function expression whilst in the process of
-        // determining the type of foo would cause foo to be given type any because of the recursive reference.
-        // Delaying the type check of the body ensures foo has been assigned a type.
         function checkNodeDeferred(node) {
             if (deferredNodes) {
                 deferredNodes.push(node);
@@ -52468,17 +43494,17 @@ var ts;
             for (var _i = 0, _a = deferredNodes; _i < _a.length; _i++) {
                 var node = _a[_i];
                 switch (node.kind) {
-                    case 192 /* FunctionExpression */:
-                    case 193 /* ArrowFunction */:
-                    case 154 /* MethodDeclaration */:
-                    case 153 /* MethodSignature */:
+                    case 192:
+                    case 193:
+                    case 154:
+                    case 153:
                         checkFunctionExpressionOrObjectLiteralMethodDeferred(node);
                         break;
-                    case 156 /* GetAccessor */:
-                    case 157 /* SetAccessor */:
+                    case 156:
+                    case 157:
                         checkAccessorDeclaration(node);
                         break;
-                    case 205 /* ClassExpression */:
+                    case 205:
                         checkClassExpressionDeferred(node);
                         break;
                 }
@@ -52492,9 +43518,9 @@ var ts;
         }
         function unusedIsError(kind) {
             switch (kind) {
-                case 0 /* Local */:
+                case 0:
                     return !!compilerOptions.noUnusedLocals;
-                case 1 /* Parameter */:
+                case 1:
                     return !!compilerOptions.noUnusedParameters;
                 default:
                     return ts.Debug.assertNever(kind);
@@ -52503,17 +43529,12 @@ var ts;
         function getPotentiallyUnusedIdentifiers(sourceFile) {
             return allPotentiallyUnusedIdentifiers.get(sourceFile.path) || ts.emptyArray;
         }
-        // Fully type check a source file and collect the relevant diagnostics.
         function checkSourceFileWorker(node) {
             var links = getNodeLinks(node);
-            if (!(links.flags & 1 /* TypeChecked */)) {
-                // If skipLibCheck is enabled, skip type checking if file is a declaration file.
-                // If skipDefaultLibCheck is enabled, skip type checking if file contains a
-                // '/// <reference no-default-lib="true"/>' directive.
+            if (!(links.flags & 1)) {
                 if (compilerOptions.skipLibCheck && node.isDeclarationFile || compilerOptions.skipDefaultLibCheck && node.hasNoDefaultLib) {
                     return;
                 }
-                // Grammar checking
                 checkGrammarSourceFile(node);
                 ts.clear(potentialThisCollisions);
                 ts.clear(potentialNewTargetCollisions);
@@ -52542,14 +43563,11 @@ var ts;
                     ts.forEach(potentialNewTargetCollisions, checkIfNewTargetIsCapturedInEnclosingScope);
                     ts.clear(potentialNewTargetCollisions);
                 }
-                links.flags |= 1 /* TypeChecked */;
+                links.flags |= 1;
             }
         }
         function getDiagnostics(sourceFile, ct) {
             try {
-                // Record the cancellation token so it can be checked later on during checkSourceElement.
-                // Do this in a finally block so we can ensure that it gets reset back to nothing after
-                // this call is done.
                 cancellationToken = ct;
                 return getDiagnosticsWorker(sourceFile);
             }
@@ -52560,29 +43578,20 @@ var ts;
         function getDiagnosticsWorker(sourceFile) {
             throwIfNonDiagnosticsProducing();
             if (sourceFile) {
-                // Some global diagnostics are deferred until they are needed and
-                // may not be reported in the firt call to getGlobalDiagnostics.
-                // We should catch these changes and report them.
                 var previousGlobalDiagnostics = diagnostics.getGlobalDiagnostics();
                 var previousGlobalDiagnosticsSize = previousGlobalDiagnostics.length;
                 checkSourceFile(sourceFile);
                 var semanticDiagnostics = diagnostics.getDiagnostics(sourceFile.fileName);
                 var currentGlobalDiagnostics = diagnostics.getGlobalDiagnostics();
                 if (currentGlobalDiagnostics !== previousGlobalDiagnostics) {
-                    // If the arrays are not the same reference, new diagnostics were added.
                     var deferredGlobalDiagnostics = ts.relativeComplement(previousGlobalDiagnostics, currentGlobalDiagnostics, ts.compareDiagnostics);
                     return ts.concatenate(deferredGlobalDiagnostics, semanticDiagnostics);
                 }
                 else if (previousGlobalDiagnosticsSize === 0 && currentGlobalDiagnostics.length > 0) {
-                    // If the arrays are the same reference, but the length has changed, a single
-                    // new diagnostic was added as DiagnosticCollection attempts to reuse the
-                    // same array.
                     return ts.concatenate(currentGlobalDiagnostics, semanticDiagnostics);
                 }
                 return semanticDiagnostics;
             }
-            // Global diagnostics are always added when a file is not provided to
-            // getDiagnostics
             ts.forEach(host.getSourceFiles(), checkSourceFile);
             return diagnostics.getDiagnostics();
         }
@@ -52595,10 +43604,8 @@ var ts;
                 throw new Error("Trying to get diagnostics from a type checker that does not produce them.");
             }
         }
-        // Language service support
         function getSymbolsInScope(location, meaning) {
-            if (location.flags & 8388608 /* InWithStatement */) {
-                // We cannot answer semantic questions within a with block, do not proceed any further
+            if (location.flags & 8388608) {
                 return [];
             }
             var symbols = ts.createSymbolTable();
@@ -52611,31 +43618,24 @@ var ts;
                         copySymbols(location.locals, meaning);
                     }
                     switch (location.kind) {
-                        case 239 /* ModuleDeclaration */:
-                            copySymbols(getSymbolOfNode(location).exports, meaning & 2623475 /* ModuleMember */);
+                        case 239:
+                            copySymbols(getSymbolOfNode(location).exports, meaning & 2623475);
                             break;
-                        case 238 /* EnumDeclaration */:
-                            copySymbols(getSymbolOfNode(location).exports, meaning & 8 /* EnumMember */);
+                        case 238:
+                            copySymbols(getSymbolOfNode(location).exports, meaning & 8);
                             break;
-                        case 205 /* ClassExpression */:
+                        case 205:
                             var className = location.name;
                             if (className) {
                                 copySymbol(location.symbol, meaning);
                             }
-                        // falls through
-                        // this fall-through is necessary because we would like to handle
-                        // type parameter inside class expression similar to how we handle it in classDeclaration and interface Declaration
-                        case 235 /* ClassDeclaration */:
-                        case 236 /* InterfaceDeclaration */:
-                            // If we didn't come from static member of class or interface,
-                            // add the type parameters into the symbol table
-                            // (type parameters of classDeclaration/classExpression and interface are in member property of the symbol.
-                            // Note: that the memberFlags come from previous iteration.
+                        case 235:
+                        case 236:
                             if (!isStatic) {
-                                copySymbols(getMembersOfSymbol(getSymbolOfNode(location)), meaning & 67901928 /* Type */);
+                                copySymbols(getMembersOfSymbol(getSymbolOfNode(location)), meaning & 67901928);
                             }
                             break;
-                        case 192 /* FunctionExpression */:
+                        case 192:
                             var funcName = location.name;
                             if (funcName) {
                                 copySymbol(location.symbol, meaning);
@@ -52645,24 +43645,14 @@ var ts;
                     if (ts.introducesArgumentsExoticObject(location)) {
                         copySymbol(argumentsSymbol, meaning);
                     }
-                    isStatic = ts.hasModifier(location, 32 /* Static */);
+                    isStatic = ts.hasModifier(location, 32);
                     location = location.parent;
                 }
                 copySymbols(globals, meaning);
             }
-            /**
-             * Copy the given symbol into symbol tables if the symbol has the given meaning
-             * and it doesn't already existed in the symbol table
-             * @param key a key for storing in symbol table; if undefined, use symbol.name
-             * @param symbol the symbol to be added into symbol table
-             * @param meaning meaning of symbol to filter by before adding to symbol table
-             */
             function copySymbol(symbol, meaning) {
                 if (ts.getCombinedLocalAndExportSymbolFlags(symbol) & meaning) {
                     var id = symbol.escapedName;
-                    // We will copy all symbol regardless of its reserved name because
-                    // symbolsToArray will check whether the key is a reserved name and
-                    // it will not copy symbol with reserved name to the array
                     if (!symbols.has(id)) {
                         symbols.set(id, symbol);
                     }
@@ -52677,34 +43667,33 @@ var ts;
             }
         }
         function isTypeDeclarationName(name) {
-            return name.kind === 71 /* Identifier */ &&
+            return name.kind === 71 &&
                 isTypeDeclaration(name.parent) &&
                 name.parent.name === name;
         }
         function isTypeDeclaration(node) {
             switch (node.kind) {
-                case 148 /* TypeParameter */:
-                case 235 /* ClassDeclaration */:
-                case 236 /* InterfaceDeclaration */:
-                case 237 /* TypeAliasDeclaration */:
-                case 238 /* EnumDeclaration */:
+                case 148:
+                case 235:
+                case 236:
+                case 237:
+                case 238:
                     return true;
                 default:
                     return false;
             }
         }
-        // True if the given identifier is part of a type reference
         function isTypeReferenceIdentifier(node) {
-            while (node.parent.kind === 146 /* QualifiedName */) {
+            while (node.parent.kind === 146) {
                 node = node.parent;
             }
-            return node.parent.kind === 162 /* TypeReference */;
+            return node.parent.kind === 162;
         }
         function isHeritageClauseElementIdentifier(node) {
-            while (node.parent.kind === 185 /* PropertyAccessExpression */) {
+            while (node.parent.kind === 185) {
                 node = node.parent;
             }
-            return node.parent.kind === 207 /* ExpressionWithTypeArguments */;
+            return node.parent.kind === 207;
         }
         function forEachEnclosingClass(node, callback) {
             var result;
@@ -52732,13 +43721,13 @@ var ts;
             return !!forEachEnclosingClass(node, function (n) { return n === classDeclaration; });
         }
         function getLeftSideOfImportEqualsOrExportAssignment(nodeOnRightSide) {
-            while (nodeOnRightSide.parent.kind === 146 /* QualifiedName */) {
+            while (nodeOnRightSide.parent.kind === 146) {
                 nodeOnRightSide = nodeOnRightSide.parent;
             }
-            if (nodeOnRightSide.parent.kind === 243 /* ImportEqualsDeclaration */) {
+            if (nodeOnRightSide.parent.kind === 243) {
                 return nodeOnRightSide.parent.moduleReference === nodeOnRightSide ? nodeOnRightSide.parent : undefined;
             }
-            if (nodeOnRightSide.parent.kind === 249 /* ExportAssignment */) {
+            if (nodeOnRightSide.parent.kind === 249) {
                 return nodeOnRightSide.parent.expression === nodeOnRightSide ? nodeOnRightSide.parent : undefined;
             }
             return undefined;
@@ -52749,12 +43738,12 @@ var ts;
         function getSpecialPropertyAssignmentSymbolFromEntityName(entityName) {
             var specialPropertyAssignmentKind = ts.getSpecialPropertyAssignmentKind(entityName.parent.parent);
             switch (specialPropertyAssignmentKind) {
-                case 1 /* ExportsProperty */:
-                case 3 /* PrototypeProperty */:
+                case 1:
+                case 3:
                     return getSymbolOfNode(entityName.parent);
-                case 4 /* ThisProperty */:
-                case 2 /* ModuleExports */:
-                case 5 /* Property */:
+                case 4:
+                case 2:
+                case 5:
                     return getSymbolOfNode(entityName.parent.parent);
             }
         }
@@ -52764,7 +43753,7 @@ var ts;
                 node = parent;
                 parent = parent.parent;
             }
-            if (parent && parent.kind === 179 /* ImportType */ && parent.qualifier === node) {
+            if (parent && parent.kind === 179 && parent.qualifier === node) {
                 return parent;
             }
             return undefined;
@@ -52774,27 +43763,23 @@ var ts;
                 return getSymbolOfNode(entityName.parent);
             }
             if (ts.isInJavaScriptFile(entityName) &&
-                entityName.parent.kind === 185 /* PropertyAccessExpression */ &&
+                entityName.parent.kind === 185 &&
                 entityName.parent === entityName.parent.parent.left) {
-                // Check if this is a special property assignment
                 var specialPropertyAssignmentSymbol = getSpecialPropertyAssignmentSymbolFromEntityName(entityName);
                 if (specialPropertyAssignmentSymbol) {
                     return specialPropertyAssignmentSymbol;
                 }
             }
-            if (entityName.parent.kind === 249 /* ExportAssignment */ && ts.isEntityNameExpression(entityName)) {
-                // Even an entity name expression that doesn't resolve as an entityname may still typecheck as a property access expression
-                var success = resolveEntityName(entityName, 
-                /*all meanings*/ 67216319 /* Value */ | 67901928 /* Type */ | 1920 /* Namespace */ | 2097152 /* Alias */, /*ignoreErrors*/ true);
+            if (entityName.parent.kind === 249 && ts.isEntityNameExpression(entityName)) {
+                var success = resolveEntityName(entityName, 67216319 | 67901928 | 1920 | 2097152, true);
                 if (success && success !== unknownSymbol) {
                     return success;
                 }
             }
             else if (!ts.isPropertyAccessExpression(entityName) && isInRightSideOfImportOrExportAssignment(entityName)) {
-                // Since we already checked for ExportAssignment, this really could only be an Import
-                var importEqualsDeclaration = ts.getAncestor(entityName, 243 /* ImportEqualsDeclaration */);
+                var importEqualsDeclaration = ts.getAncestor(entityName, 243);
                 ts.Debug.assert(importEqualsDeclaration !== undefined);
-                return getSymbolOfPartOfRightHandSideOfImportEquals(entityName, /*dontResolveAlias*/ true);
+                return getSymbolOfPartOfRightHandSideOfImportEquals(entityName, true);
             }
             if (!ts.isPropertyAccessExpression(entityName)) {
                 var possibleImportNode = isImportTypeQualifierPart(entityName);
@@ -52808,50 +43793,47 @@ var ts;
                 entityName = entityName.parent;
             }
             if (isHeritageClauseElementIdentifier(entityName)) {
-                var meaning = 0 /* None */;
-                // In an interface or class, we're definitely interested in a type.
-                if (entityName.parent.kind === 207 /* ExpressionWithTypeArguments */) {
-                    meaning = 67901928 /* Type */;
-                    // In a class 'extends' clause we are also looking for a value.
+                var meaning = 0;
+                if (entityName.parent.kind === 207) {
+                    meaning = 67901928;
                     if (ts.isExpressionWithTypeArgumentsInClassExtendsClause(entityName.parent)) {
-                        meaning |= 67216319 /* Value */;
+                        meaning |= 67216319;
                     }
                 }
                 else {
-                    meaning = 1920 /* Namespace */;
+                    meaning = 1920;
                 }
-                meaning |= 2097152 /* Alias */;
+                meaning |= 2097152;
                 var entityNameSymbol = ts.isEntityNameExpression(entityName) ? resolveEntityName(entityName, meaning) : undefined;
                 if (entityNameSymbol) {
                     return entityNameSymbol;
                 }
             }
-            if (entityName.parent.kind === 293 /* JSDocParameterTag */) {
+            if (entityName.parent.kind === 293) {
                 return ts.getParameterSymbolFromJSDoc(entityName.parent);
             }
-            if (entityName.parent.kind === 148 /* TypeParameter */ && entityName.parent.parent.kind === 296 /* JSDocTemplateTag */) {
-                ts.Debug.assert(!ts.isInJavaScriptFile(entityName)); // Otherwise `isDeclarationName` would have been true.
+            if (entityName.parent.kind === 148 && entityName.parent.parent.kind === 296) {
+                ts.Debug.assert(!ts.isInJavaScriptFile(entityName));
                 var typeParameter = ts.getTypeParameterFromJsDoc(entityName.parent);
                 return typeParameter && typeParameter.symbol;
             }
             if (ts.isExpressionNode(entityName)) {
                 if (ts.nodeIsMissing(entityName)) {
-                    // Missing entity name.
                     return undefined;
                 }
-                if (entityName.kind === 71 /* Identifier */) {
+                if (entityName.kind === 71) {
                     if (ts.isJSXTagName(entityName) && isJsxIntrinsicIdentifier(entityName)) {
                         var symbol = getIntrinsicTagSymbol(entityName.parent);
                         return symbol === unknownSymbol ? undefined : symbol;
                     }
-                    return resolveEntityName(entityName, 67216319 /* Value */, /*ignoreErrors*/ false, /*dontResolveAlias*/ true);
+                    return resolveEntityName(entityName, 67216319, false, true);
                 }
-                else if (entityName.kind === 185 /* PropertyAccessExpression */ || entityName.kind === 146 /* QualifiedName */) {
+                else if (entityName.kind === 185 || entityName.kind === 146) {
                     var links = getNodeLinks(entityName);
                     if (links.resolvedSymbol) {
                         return links.resolvedSymbol;
                     }
-                    if (entityName.kind === 185 /* PropertyAccessExpression */) {
+                    if (entityName.kind === 185) {
                         checkPropertyAccessExpression(entityName);
                     }
                     else {
@@ -52861,41 +43843,38 @@ var ts;
                 }
             }
             else if (isTypeReferenceIdentifier(entityName)) {
-                var meaning = entityName.parent.kind === 162 /* TypeReference */ ? 67901928 /* Type */ : 1920 /* Namespace */;
-                return resolveEntityName(entityName, meaning, /*ignoreErrors*/ false, /*dontResolveAlias*/ true);
+                var meaning = entityName.parent.kind === 162 ? 67901928 : 1920;
+                return resolveEntityName(entityName, meaning, false, true);
             }
-            else if (entityName.parent.kind === 262 /* JsxAttribute */) {
+            else if (entityName.parent.kind === 262) {
                 return getJsxAttributePropertySymbol(entityName.parent);
             }
-            if (entityName.parent.kind === 161 /* TypePredicate */) {
-                return resolveEntityName(entityName, /*meaning*/ 1 /* FunctionScopedVariable */);
+            if (entityName.parent.kind === 161) {
+                return resolveEntityName(entityName, 1);
             }
-            // Do we want to return undefined here?
             return undefined;
         }
         function getSymbolAtLocation(node) {
-            if (node.kind === 274 /* SourceFile */) {
+            if (node.kind === 274) {
                 return ts.isExternalModule(node) ? getMergedSymbol(node.symbol) : undefined;
             }
             var parent = node.parent;
             var grandParent = parent.parent;
-            if (node.flags & 8388608 /* InWithStatement */) {
-                // We cannot answer semantic questions within a with block, do not proceed any further
+            if (node.flags & 8388608) {
                 return undefined;
             }
             if (isDeclarationNameOrImportPropertyName(node)) {
-                // This is a declaration, call getSymbolOfNode
                 return getSymbolOfNode(parent);
             }
             else if (ts.isLiteralComputedPropertyDeclarationName(node)) {
                 return getSymbolOfNode(parent.parent);
             }
-            if (node.kind === 71 /* Identifier */) {
+            if (node.kind === 71) {
                 if (isInRightSideOfImportOrExportAssignment(node)) {
                     return getSymbolOfEntityNameOrPropertyAccessExpression(node);
                 }
-                else if (parent.kind === 182 /* BindingElement */ &&
-                    grandParent.kind === 180 /* ObjectBindingPattern */ &&
+                else if (parent.kind === 182 &&
+                    grandParent.kind === 180 &&
                     node === parent.propertyName) {
                     var typeOfPattern = getTypeOfNode(grandParent);
                     var propertyDeclaration = typeOfPattern && getPropertyOfType(typeOfPattern, node.escapedText);
@@ -52905,12 +43884,12 @@ var ts;
                 }
             }
             switch (node.kind) {
-                case 71 /* Identifier */:
-                case 185 /* PropertyAccessExpression */:
-                case 146 /* QualifiedName */:
+                case 71:
+                case 185:
+                case 146:
                     return getSymbolOfEntityNameOrPropertyAccessExpression(node);
-                case 99 /* ThisKeyword */:
-                    var container = ts.getThisContainer(node, /*includeArrowFunctions*/ false);
+                case 99:
+                    var container = ts.getThisContainer(node, false);
                     if (ts.isFunctionLike(container)) {
                         var sig = getSignatureFromDeclaration(container);
                         if (sig.thisParameter) {
@@ -52920,64 +43899,54 @@ var ts;
                     if (ts.isInExpressionContext(node)) {
                         return checkExpression(node).symbol;
                     }
-                // falls through
-                case 174 /* ThisType */:
+                case 174:
                     return getTypeFromThisTypeNode(node).symbol;
-                case 97 /* SuperKeyword */:
+                case 97:
                     return checkExpression(node).symbol;
-                case 123 /* ConstructorKeyword */:
-                    // constructor keyword for an overload, should take us to the definition if it exist
+                case 123:
                     var constructorDeclaration = node.parent;
-                    if (constructorDeclaration && constructorDeclaration.kind === 155 /* Constructor */) {
+                    if (constructorDeclaration && constructorDeclaration.kind === 155) {
                         return constructorDeclaration.parent.symbol;
                     }
                     return undefined;
-                case 9 /* StringLiteral */:
-                case 13 /* NoSubstitutionTemplateLiteral */:
-                    // 1). import x = require("./mo/*gotToDefinitionHere*/d")
-                    // 2). External module name in an import declaration
-                    // 3). Dynamic import call or require in javascript
-                    // 4). type A = import("./f/*gotToDefinitionHere*/oo")
+                case 9:
+                case 13:
                     if ((ts.isExternalModuleImportEqualsDeclaration(node.parent.parent) && ts.getExternalModuleImportEqualsDeclarationExpression(node.parent.parent) === node) ||
-                        ((node.parent.kind === 244 /* ImportDeclaration */ || node.parent.kind === 250 /* ExportDeclaration */) && node.parent.moduleSpecifier === node) ||
-                        ((ts.isInJavaScriptFile(node) && ts.isRequireCall(node.parent, /*checkArgumentIsStringLiteralLike*/ false)) || ts.isImportCall(node.parent)) ||
+                        ((node.parent.kind === 244 || node.parent.kind === 250) && node.parent.moduleSpecifier === node) ||
+                        ((ts.isInJavaScriptFile(node) && ts.isRequireCall(node.parent, false)) || ts.isImportCall(node.parent)) ||
                         (ts.isLiteralTypeNode(node.parent) && ts.isLiteralImportTypeNode(node.parent.parent) && node.parent.parent.argument === node.parent)) {
                         return resolveExternalModuleName(node, node);
                     }
-                // falls through
-                case 8 /* NumericLiteral */:
-                    // index access
+                case 8:
                     var objectType = ts.isElementAccessExpression(parent)
                         ? parent.argumentExpression === node ? getTypeOfExpression(parent.expression) : undefined
                         : ts.isLiteralTypeNode(parent) && ts.isIndexedAccessTypeNode(grandParent)
                             ? getTypeFromTypeNode(grandParent.objectType)
                             : undefined;
                     return objectType && getPropertyOfType(objectType, ts.escapeLeadingUnderscores(node.text));
-                case 79 /* DefaultKeyword */:
-                case 89 /* FunctionKeyword */:
-                case 36 /* EqualsGreaterThanToken */:
+                case 79:
+                case 89:
+                case 36:
                     return getSymbolOfNode(node.parent);
-                case 179 /* ImportType */:
+                case 179:
                     return ts.isLiteralImportTypeNode(node) ? getSymbolAtLocation(node.argument.literal) : undefined;
                 default:
                     return undefined;
             }
         }
         function getShorthandAssignmentValueSymbol(location) {
-            if (location && location.kind === 271 /* ShorthandPropertyAssignment */) {
-                return resolveEntityName(location.name, 67216319 /* Value */ | 2097152 /* Alias */);
+            if (location && location.kind === 271) {
+                return resolveEntityName(location.name, 67216319 | 2097152);
             }
             return undefined;
         }
-        /** Returns the target of an export specifier without following aliases */
         function getExportSpecifierLocalTargetSymbol(node) {
             return node.parent.parent.moduleSpecifier ?
                 getExternalModuleMember(node.parent.parent, node) :
-                resolveEntityName(node.propertyName || node.name, 67216319 /* Value */ | 67901928 /* Type */ | 1920 /* Namespace */ | 2097152 /* Alias */);
+                resolveEntityName(node.propertyName || node.name, 67216319 | 67901928 | 1920 | 2097152);
         }
         function getTypeOfNode(node) {
-            if (node.flags & 8388608 /* InWithStatement */) {
-                // We cannot answer semantic questions within a with block, do not proceed any further
+            if (node.flags & 8388608) {
                 return errorType;
             }
             if (ts.isPartOfTypeNode(node)) {
@@ -52993,15 +43962,12 @@ var ts;
                 return getRegularTypeOfExpression(node);
             }
             if (ts.isExpressionWithTypeArgumentsInClassExtendsClause(node)) {
-                // A SyntaxKind.ExpressionWithTypeArguments is considered a type node, except when it occurs in the
-                // extends clause of a class. We handle that case here.
                 var classNode = ts.getContainingClass(node);
                 var classType = getDeclaredTypeOfSymbol(getSymbolOfNode(classNode));
                 var baseType = getBaseTypes(classType)[0];
                 return baseType && getTypeWithThisArgument(baseType, classType.thisType);
             }
             if (isTypeDeclaration(node)) {
-                // In this case, we call getSymbolOfNode instead of getSymbolAtLocation because it is a declaration
                 var symbol = getSymbolOfNode(node);
                 return getDeclaredTypeOfSymbol(symbol);
             }
@@ -53010,7 +43976,6 @@ var ts;
                 return symbol && getDeclaredTypeOfSymbol(symbol);
             }
             if (ts.isDeclaration(node)) {
-                // In this case, we call getSymbolOfNode instead of getSymbolAtLocation because it is a declaration
                 var symbol = getSymbolOfNode(node);
                 return getTypeOfSymbol(symbol);
             }
@@ -53019,7 +43984,7 @@ var ts;
                 return symbol && getTypeOfSymbol(symbol);
             }
             if (ts.isBindingPattern(node)) {
-                return getTypeForVariableLikeDeclaration(node.parent, /*includeOptionality*/ true);
+                return getTypeForVariableLikeDeclaration(node.parent, true);
             }
             if (isInRightSideOfImportOrExportAssignment(node)) {
                 var symbol = getSymbolAtLocation(node);
@@ -53030,48 +43995,26 @@ var ts;
             }
             return errorType;
         }
-        // Gets the type of object literal or array literal of destructuring assignment.
-        // { a } from
-        //     for ( { a } of elems) {
-        //     }
-        // [ a ] from
-        //     [a] = [ some array ...]
         function getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr) {
-            ts.Debug.assert(expr.kind === 184 /* ObjectLiteralExpression */ || expr.kind === 183 /* ArrayLiteralExpression */);
-            // If this is from "for of"
-            //     for ( { a } of elems) {
-            //     }
-            if (expr.parent.kind === 222 /* ForOfStatement */) {
+            ts.Debug.assert(expr.kind === 184 || expr.kind === 183);
+            if (expr.parent.kind === 222) {
                 var iteratedType = checkRightHandSideOfForOf(expr.parent.expression, expr.parent.awaitModifier);
                 return checkDestructuringAssignment(expr, iteratedType || errorType);
             }
-            // If this is from "for" initializer
-            //     for ({a } = elems[0];.....) { }
-            if (expr.parent.kind === 200 /* BinaryExpression */) {
+            if (expr.parent.kind === 200) {
                 var iteratedType = getTypeOfExpression(expr.parent.right);
                 return checkDestructuringAssignment(expr, iteratedType || errorType);
             }
-            // If this is from nested object binding pattern
-            //     for ({ skills: { primary, secondary } } = multiRobot, i = 0; i < 1; i++) {
-            if (expr.parent.kind === 270 /* PropertyAssignment */) {
+            if (expr.parent.kind === 270) {
                 var typeOfParentObjectLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr.parent.parent);
-                return checkObjectLiteralDestructuringPropertyAssignment(typeOfParentObjectLiteral || errorType, expr.parent); // TODO: GH#18217
+                return checkObjectLiteralDestructuringPropertyAssignment(typeOfParentObjectLiteral || errorType, expr.parent);
             }
-            // Array literal assignment - array destructuring pattern
-            ts.Debug.assert(expr.parent.kind === 183 /* ArrayLiteralExpression */);
-            //    [{ property1: p1, property2 }] = elems;
+            ts.Debug.assert(expr.parent.kind === 183);
             var typeOfArrayLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr.parent);
-            var elementType = checkIteratedTypeOrElementType(typeOfArrayLiteral || errorType, expr.parent, /*allowStringInput*/ false, /*allowAsyncIterables*/ false) || errorType;
-            return checkArrayLiteralDestructuringElementAssignment(expr.parent, typeOfArrayLiteral, expr.parent.elements.indexOf(expr), elementType || errorType); // TODO: GH#18217
-        }
-        // Gets the property symbol corresponding to the property in destructuring assignment
-        // 'property1' from
-        //     for ( { property1: a } of elems) {
-        //     }
-        // 'property1' at location 'a' from:
-        //     [a] = [ property1, property2 ]
+            var elementType = checkIteratedTypeOrElementType(typeOfArrayLiteral || errorType, expr.parent, false, false) || errorType;
+            return checkArrayLiteralDestructuringElementAssignment(expr.parent, typeOfArrayLiteral, expr.parent.elements.indexOf(expr), elementType || errorType);
+        }
         function getPropertySymbolOfDestructuringAssignment(location) {
-            // Get the type of the object or array literal and then look for property of given name in the type
             var typeOfObjectLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(location.parent.parent);
             return typeOfObjectLiteral && getPropertyOfType(typeOfObjectLiteral, location.escapedText);
         }
@@ -53081,18 +44024,12 @@ var ts;
             }
             return getRegularTypeOfLiteralType(getTypeOfExpression(expr));
         }
-        /**
-         * Gets either the static or instance type of a class element, based on
-         * whether the element is declared as "static".
-         */
         function getParentTypeOfClassElement(node) {
             var classSymbol = getSymbolOfNode(node.parent);
-            return ts.hasModifier(node, 32 /* Static */)
+            return ts.hasModifier(node, 32)
                 ? getTypeOfSymbol(classSymbol)
                 : getDeclaredTypeOfSymbol(classSymbol);
         }
-        // Return the list of properties of the given type, augmented with properties from Function
-        // if the type has call or construct signatures
         function getAugmentedPropertiesOfType(type) {
             type = getApparentType(type);
             var propsByName = ts.createSymbolTable(getPropertiesOfType(type));
@@ -53113,10 +44050,10 @@ var ts;
             return roots ? ts.flatMap(roots, getRootSymbols) : [symbol];
         }
         function getImmediateRootSymbols(symbol) {
-            if (ts.getCheckFlags(symbol) & 6 /* Synthetic */) {
+            if (ts.getCheckFlags(symbol) & 6) {
                 return ts.mapDefined(getSymbolLinks(symbol).containingType.types, function (type) { return getPropertyOfType(type, symbol.escapedName); });
             }
-            else if (symbol.flags & 33554432 /* Transient */) {
+            else if (symbol.flags & 33554432) {
                 var _a = symbol, leftSpread = _a.leftSpread, rightSpread = _a.rightSpread, syntheticOrigin = _a.syntheticOrigin;
                 return leftSpread ? [leftSpread, rightSpread]
                     : syntheticOrigin ? [syntheticOrigin]
@@ -53132,12 +44069,11 @@ var ts;
             }
             return target;
         }
-        // Emitter support
         function isArgumentsLocalBinding(nodeIn) {
             if (!ts.isGeneratedIdentifier(nodeIn)) {
                 var node = ts.getParseTreeNode(nodeIn, ts.isIdentifier);
                 if (node) {
-                    var isPropertyName_1 = node.parent.kind === 185 /* PropertyAccessExpression */ && node.parent.name === node;
+                    var isPropertyName_1 = node.parent.kind === 185 && node.parent.name === node;
                     return !isPropertyName_1 && getReferencedValueSymbol(node) === argumentsSymbol;
                 }
             }
@@ -53146,57 +44082,42 @@ var ts;
         function moduleExportsSomeValue(moduleReferenceExpression) {
             var moduleSymbol = resolveExternalModuleName(moduleReferenceExpression.parent, moduleReferenceExpression);
             if (!moduleSymbol || ts.isShorthandAmbientModuleSymbol(moduleSymbol)) {
-                // If the module is not found or is shorthand, assume that it may export a value.
                 return true;
             }
             var hasExportAssignment = hasExportAssignmentSymbol(moduleSymbol);
-            // if module has export assignment then 'resolveExternalModuleSymbol' will return resolved symbol for export assignment
-            // otherwise it will return moduleSymbol itself
             moduleSymbol = resolveExternalModuleSymbol(moduleSymbol);
             var symbolLinks = getSymbolLinks(moduleSymbol);
             if (symbolLinks.exportsSomeValue === undefined) {
-                // for export assignments - check if resolved symbol for RHS is itself a value
-                // otherwise - check if at least one export is value
                 symbolLinks.exportsSomeValue = hasExportAssignment
-                    ? !!(moduleSymbol.flags & 67216319 /* Value */)
+                    ? !!(moduleSymbol.flags & 67216319)
                     : ts.forEachEntry(getExportsOfModule(moduleSymbol), isValue);
             }
             return symbolLinks.exportsSomeValue;
             function isValue(s) {
                 s = resolveSymbol(s);
-                return s && !!(s.flags & 67216319 /* Value */);
+                return s && !!(s.flags & 67216319);
             }
         }
         function isNameOfModuleOrEnumDeclaration(node) {
             return ts.isModuleOrEnumDeclaration(node.parent) && node === node.parent.name;
         }
-        // When resolved as an expression identifier, if the given node references an exported entity, return the declaration
-        // node of the exported entity's container. Otherwise, return undefined.
         function getReferencedExportContainer(nodeIn, prefixLocals) {
             var node = ts.getParseTreeNode(nodeIn, ts.isIdentifier);
             if (node) {
-                // When resolving the export container for the name of a module or enum
-                // declaration, we need to start resolution at the declaration's container.
-                // Otherwise, we could incorrectly resolve the export container as the
-                // declaration if it contains an exported member with the same name.
-                var symbol = getReferencedValueSymbol(node, /*startInDeclarationContainer*/ isNameOfModuleOrEnumDeclaration(node));
+                var symbol = getReferencedValueSymbol(node, isNameOfModuleOrEnumDeclaration(node));
                 if (symbol) {
-                    if (symbol.flags & 1048576 /* ExportValue */) {
-                        // If we reference an exported entity within the same module declaration, then whether
-                        // we prefix depends on the kind of entity. SymbolFlags.ExportHasLocal encompasses all the
-                        // kinds that we do NOT prefix.
+                    if (symbol.flags & 1048576) {
                         var exportSymbol = getMergedSymbol(symbol.exportSymbol);
-                        if (!prefixLocals && exportSymbol.flags & 944 /* ExportHasLocal */ && !(exportSymbol.flags & 3 /* Variable */)) {
+                        if (!prefixLocals && exportSymbol.flags & 944 && !(exportSymbol.flags & 3)) {
                             return undefined;
                         }
                         symbol = exportSymbol;
                     }
                     var parentSymbol_1 = getParentOfSymbol(symbol);
                     if (parentSymbol_1) {
-                        if (parentSymbol_1.flags & 512 /* ValueModule */ && parentSymbol_1.valueDeclaration.kind === 274 /* SourceFile */) {
+                        if (parentSymbol_1.flags & 512 && parentSymbol_1.valueDeclaration.kind === 274) {
                             var symbolFile = parentSymbol_1.valueDeclaration;
                             var referenceFile = ts.getSourceFileOfNode(node);
-                            // If `node` accesses an export and that export isn't in the same file, then symbol is a namespace export, so return undefined.
                             var symbolIsUmdExport = symbolFile !== referenceFile;
                             return symbolIsUmdExport ? undefined : symbolFile;
                         }
@@ -53205,50 +44126,30 @@ var ts;
                 }
             }
         }
-        // When resolved as an expression identifier, if the given node references an import, return the declaration of
-        // that import. Otherwise, return undefined.
         function getReferencedImportDeclaration(nodeIn) {
             var node = ts.getParseTreeNode(nodeIn, ts.isIdentifier);
             if (node) {
                 var symbol = getReferencedValueSymbol(node);
-                // We should only get the declaration of an alias if there isn't a local value
-                // declaration for the symbol
-                if (isNonLocalAlias(symbol, /*excludes*/ 67216319 /* Value */)) {
+                if (isNonLocalAlias(symbol, 67216319)) {
                     return getDeclarationOfAliasSymbol(symbol);
                 }
             }
             return undefined;
         }
         function isSymbolOfDeclarationWithCollidingName(symbol) {
-            if (symbol.flags & 418 /* BlockScoped */) {
+            if (symbol.flags & 418) {
                 var links = getSymbolLinks(symbol);
                 if (links.isDeclarationWithCollidingName === undefined) {
                     var container = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
                     if (ts.isStatementWithLocals(container)) {
                         var nodeLinks_1 = getNodeLinks(symbol.valueDeclaration);
-                        if (resolveName(container.parent, symbol.escapedName, 67216319 /* Value */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined, /*isUse*/ false)) {
-                            // redeclaration - always should be renamed
+                        if (resolveName(container.parent, symbol.escapedName, 67216319, undefined, undefined, false)) {
                             links.isDeclarationWithCollidingName = true;
                         }
-                        else if (nodeLinks_1.flags & 131072 /* CapturedBlockScopedBinding */) {
-                            // binding is captured in the function
-                            // should be renamed if:
-                            // - binding is not top level - top level bindings never collide with anything
-                            // AND
-                            //   - binding is not declared in loop, should be renamed to avoid name reuse across siblings
-                            //     let a, b
-                            //     { let x = 1; a = () => x; }
-                            //     { let x = 100; b = () => x; }
-                            //     console.log(a()); // should print '1'
-                            //     console.log(b()); // should print '100'
-                            //     OR
-                            //   - binding is declared inside loop but not in inside initializer of iteration statement or directly inside loop body
-                            //     * variables from initializer are passed to rewritten loop body as parameters so they are not captured directly
-                            //     * variables that are declared immediately in loop body will become top level variable after loop is rewritten and thus
-                            //       they will not collide with anything
-                            var isDeclaredInLoop = nodeLinks_1.flags & 262144 /* BlockScopedBindingInLoop */;
-                            var inLoopInitializer = ts.isIterationStatement(container, /*lookInLabeledStatements*/ false);
-                            var inLoopBodyBlock = container.kind === 213 /* Block */ && ts.isIterationStatement(container.parent, /*lookInLabeledStatements*/ false);
+                        else if (nodeLinks_1.flags & 131072) {
+                            var isDeclaredInLoop = nodeLinks_1.flags & 262144;
+                            var inLoopInitializer = ts.isIterationStatement(container, false);
+                            var inLoopBodyBlock = container.kind === 213 && ts.isIterationStatement(container.parent, false);
                             links.isDeclarationWithCollidingName = !ts.isBlockScopedContainerTopLevel(container) && (!isDeclaredInLoop || (!inLoopInitializer && !inLoopBodyBlock));
                         }
                         else {
@@ -53260,9 +44161,6 @@ var ts;
             }
             return false;
         }
-        // When resolved as an expression identifier, if the given node references a nested block scoped entity with
-        // a name that either hides an existing name or might hide it when compiled downlevel,
-        // return the declaration of that entity. Otherwise, return undefined.
         function getReferencedDeclarationWithCollidingName(nodeIn) {
             if (!ts.isGeneratedIdentifier(nodeIn)) {
                 var node = ts.getParseTreeNode(nodeIn, ts.isIdentifier);
@@ -53275,8 +44173,6 @@ var ts;
             }
             return undefined;
         }
-        // Return true if the given node is a declaration of a nested block scoped entity with a name that either hides an
-        // existing name or might hide a name when compiled downlevel
         function isDeclarationWithCollidingName(nodeIn) {
             var node = ts.getParseTreeNode(nodeIn, ts.isDeclaration);
             if (node) {
@@ -53289,18 +44185,18 @@ var ts;
         }
         function isValueAliasDeclaration(node) {
             switch (node.kind) {
-                case 243 /* ImportEqualsDeclaration */:
-                case 245 /* ImportClause */:
-                case 246 /* NamespaceImport */:
-                case 248 /* ImportSpecifier */:
-                case 252 /* ExportSpecifier */:
+                case 243:
+                case 245:
+                case 246:
+                case 248:
+                case 252:
                     return isAliasResolvedToValue(getSymbolOfNode(node) || unknownSymbol);
-                case 250 /* ExportDeclaration */:
+                case 250:
                     var exportClause = node.exportClause;
                     return !!exportClause && ts.some(exportClause.elements, isValueAliasDeclaration);
-                case 249 /* ExportAssignment */:
+                case 249:
                     return node.expression
-                        && node.expression.kind === 71 /* Identifier */
+                        && node.expression.kind === 71
                         ? isAliasResolvedToValue(getSymbolOfNode(node) || unknownSymbol)
                         : true;
             }
@@ -53308,8 +44204,7 @@ var ts;
         }
         function isTopLevelValueImportEqualsWithEntityName(nodeIn) {
             var node = ts.getParseTreeNode(nodeIn, ts.isImportEqualsDeclaration);
-            if (node === undefined || node.parent.kind !== 274 /* SourceFile */ || !ts.isInternalModuleImportEqualsDeclaration(node)) {
-                // parent is not source file or it is not reference to internal module
+            if (node === undefined || node.parent.kind !== 274 || !ts.isInternalModuleImportEqualsDeclaration(node)) {
                 return false;
             }
             var isValue = isAliasResolvedToValue(getSymbolOfNode(node));
@@ -53320,9 +44215,7 @@ var ts;
             if (target === unknownSymbol) {
                 return true;
             }
-            // const enums and modules that contain only const enums are not considered values from the emit perspective
-            // unless 'preserveConstEnums' option is set to true
-            return !!(target.flags & 67216319 /* Value */) &&
+            return !!(target.flags & 67216319) &&
                 (compilerOptions.preserveConstEnums || !isConstEnumOrConstEnumOnlyModule(target));
         }
         function isConstEnumOrConstEnumOnlyModule(s) {
@@ -53334,9 +44227,8 @@ var ts;
                 if (symbol && getSymbolLinks(symbol).referenced) {
                     return true;
                 }
-                var target = getSymbolLinks(symbol).target; // TODO: GH#18217
-                if (target && ts.getModifierFlags(node) & 1 /* Export */ && target.flags & 67216319 /* Value */) {
-                    // An `export import ... =` of a value symbol is always considered referenced
+                var target = getSymbolLinks(symbol).target;
+                if (target && ts.getModifierFlags(node) & 1 && target.flags & 67216319) {
                     return true;
                 }
             }
@@ -53348,21 +44240,10 @@ var ts;
         function isImplementationOfOverload(node) {
             if (ts.nodeIsPresent(node.body)) {
                 if (ts.isGetAccessor(node) || ts.isSetAccessor(node))
-                    return false; // Get or set accessors can never be overload implementations, but can have up to 2 signatures
+                    return false;
                 var symbol = getSymbolOfNode(node);
                 var signaturesOfSymbol = getSignaturesOfSymbol(symbol);
-                // If this function body corresponds to function with multiple signature, it is implementation of overload
-                // e.g.: function foo(a: string): string;
-                //       function foo(a: number): number;
-                //       function foo(a: any) { // This is implementation of the overloads
-                //           return a;
-                //       }
                 return signaturesOfSymbol.length > 1 ||
-                    // If there is single signature for the symbol, it is overload if that signature isn't coming from the node
-                    // e.g.: function foo(a: string): string;
-                    //       function foo(a: any) { // This is implementation of the overloads
-                    //           return a;
-                    //       }
                     (signaturesOfSymbol.length === 1 && signaturesOfSymbol[0].declaration !== node);
             }
             return false;
@@ -53372,13 +44253,13 @@ var ts;
                 !isOptionalParameter(parameter) &&
                 !ts.isJSDocParameterTag(parameter) &&
                 !!parameter.initializer &&
-                !ts.hasModifier(parameter, 92 /* ParameterPropertyModifier */);
+                !ts.hasModifier(parameter, 92);
         }
         function isOptionalUninitializedParameterProperty(parameter) {
             return strictNullChecks &&
                 isOptionalParameter(parameter) &&
                 !parameter.initializer &&
-                ts.hasModifier(parameter, 92 /* ParameterPropertyModifier */);
+                ts.hasModifier(parameter, 92);
         }
         function getNodeCheckFlags(node) {
             return getNodeLinks(node).flags || 0;
@@ -53389,20 +44270,19 @@ var ts;
         }
         function canHaveConstantValue(node) {
             switch (node.kind) {
-                case 273 /* EnumMember */:
-                case 185 /* PropertyAccessExpression */:
-                case 186 /* ElementAccessExpression */:
+                case 273:
+                case 185:
+                case 186:
                     return true;
             }
             return false;
         }
         function getConstantValue(node) {
-            if (node.kind === 273 /* EnumMember */) {
+            if (node.kind === 273) {
                 return getEnumMemberValue(node);
             }
             var symbol = getNodeLinks(node).resolvedSymbol;
-            if (symbol && (symbol.flags & 8 /* EnumMember */)) {
-                // inline property\index accesses only for const enums
+            if (symbol && (symbol.flags & 8)) {
                 if (ts.isConstEnumDeclaration(symbol.valueDeclaration.parent)) {
                     return getEnumMemberValue(symbol.valueDeclaration);
                 }
@@ -53410,10 +44290,9 @@ var ts;
             return undefined;
         }
         function isFunctionType(type) {
-            return !!(type.flags & 131072 /* Object */) && getSignaturesOfType(type, 0 /* Call */).length > 0;
+            return !!(type.flags & 131072) && getSignaturesOfType(type, 0).length > 0;
         }
         function getTypeReferenceSerializationKind(typeNameIn, location) {
-            // ensure both `typeName` and `location` are parse tree nodes.
             var typeName = ts.getParseTreeNode(typeNameIn, ts.isEntityName);
             if (!typeName)
                 return ts.TypeReferenceSerializationKind.Unknown;
@@ -53422,12 +44301,10 @@ var ts;
                 if (!location)
                     return ts.TypeReferenceSerializationKind.Unknown;
             }
-            // Resolve the symbol as a value to ensure the type can be reached at runtime during emit.
-            var valueSymbol = resolveEntityName(typeName, 67216319 /* Value */, /*ignoreErrors*/ true, /*dontResolveAlias*/ false, location);
-            // Resolve the symbol as a type so that we can provide a more useful hint for the type serializer.
-            var typeSymbol = resolveEntityName(typeName, 67901928 /* Type */, /*ignoreErrors*/ true, /*dontResolveAlias*/ false, location);
+            var valueSymbol = resolveEntityName(typeName, 67216319, true, false, location);
+            var typeSymbol = resolveEntityName(typeName, 67901928, true, false, location);
             if (valueSymbol && valueSymbol === typeSymbol) {
-                var globalPromiseSymbol = getGlobalPromiseConstructorSymbol(/*reportErrors*/ false);
+                var globalPromiseSymbol = getGlobalPromiseConstructorSymbol(false);
                 if (globalPromiseSymbol && valueSymbol === globalPromiseSymbol) {
                     return ts.TypeReferenceSerializationKind.Promise;
                 }
@@ -53436,7 +44313,6 @@ var ts;
                     return ts.TypeReferenceSerializationKind.TypeWithConstructSignatureAndValue;
                 }
             }
-            // We might not be able to resolve type symbol so use unknown type in that case (eg error case)
             if (!typeSymbol) {
                 return ts.TypeReferenceSerializationKind.Unknown;
             }
@@ -53444,25 +44320,25 @@ var ts;
             if (type === errorType) {
                 return ts.TypeReferenceSerializationKind.Unknown;
             }
-            else if (type.flags & 3 /* AnyOrUnknown */) {
+            else if (type.flags & 3) {
                 return ts.TypeReferenceSerializationKind.ObjectType;
             }
-            else if (isTypeAssignableToKind(type, 4096 /* Void */ | 24576 /* Nullable */ | 32768 /* Never */)) {
+            else if (isTypeAssignableToKind(type, 4096 | 24576 | 32768)) {
                 return ts.TypeReferenceSerializationKind.VoidNullableOrNeverType;
             }
-            else if (isTypeAssignableToKind(type, 272 /* BooleanLike */)) {
+            else if (isTypeAssignableToKind(type, 272)) {
                 return ts.TypeReferenceSerializationKind.BooleanType;
             }
-            else if (isTypeAssignableToKind(type, 168 /* NumberLike */)) {
+            else if (isTypeAssignableToKind(type, 168)) {
                 return ts.TypeReferenceSerializationKind.NumberLikeType;
             }
-            else if (isTypeAssignableToKind(type, 68 /* StringLike */)) {
+            else if (isTypeAssignableToKind(type, 68)) {
                 return ts.TypeReferenceSerializationKind.StringLikeType;
             }
             else if (isTupleType(type)) {
                 return ts.TypeReferenceSerializationKind.ArrayLikeType;
             }
-            else if (isTypeAssignableToKind(type, 3072 /* ESSymbolLike */)) {
+            else if (isTypeAssignableToKind(type, 3072)) {
                 return ts.TypeReferenceSerializationKind.ESSymbolType;
             }
             else if (isFunctionType(type)) {
@@ -53478,37 +44354,36 @@ var ts;
         function createTypeOfDeclaration(declarationIn, enclosingDeclaration, flags, tracker, addUndefined) {
             var declaration = ts.getParseTreeNode(declarationIn, ts.isVariableLikeOrAccessor);
             if (!declaration) {
-                return ts.createToken(119 /* AnyKeyword */);
+                return ts.createToken(119);
             }
-            // Get type of the symbol if this is the valid symbol otherwise get type at location
             var symbol = getSymbolOfNode(declaration);
-            var type = symbol && !(symbol.flags & (2048 /* TypeLiteral */ | 131072 /* Signature */))
+            var type = symbol && !(symbol.flags & (2048 | 131072))
                 ? getWidenedLiteralType(getTypeOfSymbol(symbol))
                 : errorType;
-            if (type.flags & 2048 /* UniqueESSymbol */ &&
+            if (type.flags & 2048 &&
                 type.symbol === symbol) {
-                flags |= 1048576 /* AllowUniqueESSymbolType */;
+                flags |= 1048576;
             }
             if (addUndefined) {
                 type = getOptionalType(type);
             }
-            return nodeBuilder.typeToTypeNode(type, enclosingDeclaration, flags | 1024 /* MultilineObjectLiterals */, tracker);
+            return nodeBuilder.typeToTypeNode(type, enclosingDeclaration, flags | 1024, tracker);
         }
         function createReturnTypeOfSignatureDeclaration(signatureDeclarationIn, enclosingDeclaration, flags, tracker) {
             var signatureDeclaration = ts.getParseTreeNode(signatureDeclarationIn, ts.isFunctionLike);
             if (!signatureDeclaration) {
-                return ts.createToken(119 /* AnyKeyword */);
+                return ts.createToken(119);
             }
             var signature = getSignatureFromDeclaration(signatureDeclaration);
-            return nodeBuilder.typeToTypeNode(getReturnTypeOfSignature(signature), enclosingDeclaration, flags | 1024 /* MultilineObjectLiterals */, tracker);
+            return nodeBuilder.typeToTypeNode(getReturnTypeOfSignature(signature), enclosingDeclaration, flags | 1024, tracker);
         }
         function createTypeOfExpression(exprIn, enclosingDeclaration, flags, tracker) {
             var expr = ts.getParseTreeNode(exprIn, ts.isExpression);
             if (!expr) {
-                return ts.createToken(119 /* AnyKeyword */);
+                return ts.createToken(119);
             }
             var type = getWidenedType(getRegularTypeOfExpression(expr));
-            return nodeBuilder.typeToTypeNode(type, enclosingDeclaration, flags | 1024 /* MultilineObjectLiterals */, tracker);
+            return nodeBuilder.typeToTypeNode(type, enclosingDeclaration, flags | 1024, tracker);
         }
         function hasGlobalName(name) {
             return globals.has(ts.escapeLeadingUnderscores(name));
@@ -53520,14 +44395,12 @@ var ts;
             }
             var location = reference;
             if (startInDeclarationContainer) {
-                // When resolving the name of a declaration as a value, we need to start resolution
-                // at a point outside of the declaration.
                 var parent = reference.parent;
                 if (ts.isDeclaration(parent) && reference === parent.name) {
                     location = getDeclarationContainer(parent);
                 }
             }
-            return resolveName(location, reference.escapedText, 67216319 /* Value */ | 1048576 /* ExportValue */ | 2097152 /* Alias */, /*nodeNotFoundMessage*/ undefined, /*nameArg*/ undefined, /*isUse*/ true);
+            return resolveName(location, reference.escapedText, 67216319 | 1048576 | 2097152, undefined, undefined, true);
         }
         function getReferencedValueDeclaration(referenceIn) {
             if (!ts.isGeneratedIdentifier(referenceIn)) {
@@ -53544,7 +44417,7 @@ var ts;
         function isLiteralConstDeclaration(node) {
             if (ts.isConst(node)) {
                 var type = getTypeOfSymbol(getSymbolOfNode(node));
-                return !!(type.flags & 192 /* StringOrNumberLiteral */ && type.flags & 33554432 /* FreshLiteral */);
+                return !!(type.flags & 192 && type.flags & 33554432);
             }
             return false;
         }
@@ -53556,12 +44429,9 @@ var ts;
             return literalTypeToNode(type);
         }
         function createResolver() {
-            // this variable and functions that use it are deliberately moved here from the outer scope
-            // to avoid scope pollution
             var resolvedTypeReferenceDirectives = host.getResolvedTypeReferenceDirectives();
             var fileToDirective;
             if (resolvedTypeReferenceDirectives) {
-                // populate reverse mapping: file path -> type reference directive that was resolved to this file
                 fileToDirective = ts.createMap();
                 resolvedTypeReferenceDirectives.forEach(function (resolvedDirective, key) {
                     if (!resolvedDirective || !resolvedDirective.resolvedFileName) {
@@ -53578,13 +44448,11 @@ var ts;
                 isDeclarationWithCollidingName: isDeclarationWithCollidingName,
                 isValueAliasDeclaration: function (node) {
                     node = ts.getParseTreeNode(node);
-                    // Synthesized nodes are always treated like values.
                     return node ? isValueAliasDeclaration(node) : true;
                 },
                 hasGlobalName: hasGlobalName,
                 isReferencedAliasDeclaration: function (node, checkChildren) {
                     node = ts.getParseTreeNode(node);
-                    // Synthesized nodes are always treated as referenced.
                     return node ? isReferencedAliasDeclaration(node, checkChildren) : true;
                 },
                 getNodeCheckFlags: function (node) {
@@ -53619,17 +44487,17 @@ var ts;
                 isLateBound: function (nodeIn) {
                     var node = ts.getParseTreeNode(nodeIn, ts.isDeclaration);
                     var symbol = node && getSymbolOfNode(node);
-                    return !!(symbol && ts.getCheckFlags(symbol) & 1024 /* Late */);
+                    return !!(symbol && ts.getCheckFlags(symbol) & 1024);
                 },
                 getJsxFactoryEntity: function (location) { return location ? (getJsxNamespace(location), (ts.getSourceFileOfNode(location).localJsxFactory || _jsxFactoryEntity)) : _jsxFactoryEntity; },
                 getAllAccessorDeclarations: function (accessor) {
-                    accessor = ts.getParseTreeNode(accessor, ts.isGetOrSetAccessorDeclaration); // TODO: GH#18217
-                    var otherKind = accessor.kind === 157 /* SetAccessor */ ? 156 /* GetAccessor */ : 157 /* SetAccessor */;
+                    accessor = ts.getParseTreeNode(accessor, ts.isGetOrSetAccessorDeclaration);
+                    var otherKind = accessor.kind === 157 ? 156 : 157;
                     var otherAccessor = ts.getDeclarationOfKind(getSymbolOfNode(accessor), otherKind);
                     var firstAccessor = otherAccessor && (otherAccessor.pos < accessor.pos) ? otherAccessor : accessor;
                     var secondAccessor = otherAccessor && (otherAccessor.pos < accessor.pos) ? accessor : otherAccessor;
-                    var setAccessor = accessor.kind === 157 /* SetAccessor */ ? accessor : otherAccessor;
-                    var getAccessor = accessor.kind === 156 /* GetAccessor */ ? accessor : otherAccessor;
+                    var setAccessor = accessor.kind === 157 ? accessor : otherAccessor;
+                    var getAccessor = accessor.kind === 156 ? accessor : otherAccessor;
                     return {
                         firstAccessor: firstAccessor,
                         secondAccessor: secondAccessor,
@@ -53639,38 +44507,29 @@ var ts;
                 }
             };
             function isInHeritageClause(node) {
-                return node.parent && node.parent.kind === 207 /* ExpressionWithTypeArguments */ && node.parent.parent && node.parent.parent.kind === 268 /* HeritageClause */;
+                return node.parent && node.parent.kind === 207 && node.parent.parent && node.parent.parent.kind === 268;
             }
-            // defined here to avoid outer scope pollution
             function getTypeReferenceDirectivesForEntityName(node) {
-                // program does not have any files with type reference directives - bail out
                 if (!fileToDirective) {
                     return undefined;
                 }
-                // property access can only be used as values, or types when within an expression with type arguments inside a heritage clause
-                // qualified names can only be used as types\namespaces
-                // identifiers are treated as values only if they appear in type queries
-                var meaning = 67901928 /* Type */ | 1920 /* Namespace */;
-                if ((node.kind === 71 /* Identifier */ && isInTypeQuery(node)) || (node.kind === 185 /* PropertyAccessExpression */ && !isInHeritageClause(node))) {
-                    meaning = 67216319 /* Value */ | 1048576 /* ExportValue */;
+                var meaning = 67901928 | 1920;
+                if ((node.kind === 71 && isInTypeQuery(node)) || (node.kind === 185 && !isInHeritageClause(node))) {
+                    meaning = 67216319 | 1048576;
                 }
-                var symbol = resolveEntityName(node, meaning, /*ignoreErrors*/ true);
+                var symbol = resolveEntityName(node, meaning, true);
                 return symbol && symbol !== unknownSymbol ? getTypeReferenceDirectivesForSymbol(symbol, meaning) : undefined;
             }
-            // defined here to avoid outer scope pollution
             function getTypeReferenceDirectivesForSymbol(symbol, meaning) {
-                // program does not have any files with type reference directives - bail out
                 if (!fileToDirective) {
                     return undefined;
                 }
                 if (!isSymbolFromTypeDeclarationFile(symbol)) {
                     return undefined;
                 }
-                // check what declarations in the symbol can contribute to the target meaning
                 var typeReferenceDirectives;
                 for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
                     var decl = _a[_i];
-                    // check meaning of the local symbol to see if declaration needs to be analyzed further
                     if (decl.symbol && decl.symbol.flags & meaning) {
                         var file = ts.getSourceFileOfNode(decl);
                         var typeReferenceDirective = fileToDirective.get(file.path);
@@ -53678,7 +44537,6 @@ var ts;
                             (typeReferenceDirectives || (typeReferenceDirectives = [])).push(typeReferenceDirective);
                         }
                         else {
-                            // found at least one entry that does not originate from type reference directive
                             return undefined;
                         }
                     }
@@ -53686,12 +44544,9 @@ var ts;
                 return typeReferenceDirectives;
             }
             function isSymbolFromTypeDeclarationFile(symbol) {
-                // bail out if symbol does not have associated declarations (i.e. this is transient symbol created for property in binding pattern)
                 if (!symbol.declarations) {
                     return false;
                 }
-                // walk the parent chain for symbols to make sure that top level parent symbol is in the global scope
-                // external modules cannot define or contribute to type declaration files
                 var current = symbol;
                 while (true) {
                     var parent = getParentOfSymbol(current);
@@ -53702,10 +44557,9 @@ var ts;
                         break;
                     }
                 }
-                if (current.valueDeclaration && current.valueDeclaration.kind === 274 /* SourceFile */ && current.flags & 512 /* ValueModule */) {
+                if (current.valueDeclaration && current.valueDeclaration.kind === 274 && current.flags & 512) {
                     return false;
                 }
-                // check that at least one declaration of top level symbol originates from type declaration file
                 for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
                     var decl = _a[_i];
                     var file = ts.getSourceFileOfNode(decl);
@@ -53717,20 +44571,18 @@ var ts;
             }
         }
         function getExternalModuleFileFromDeclaration(declaration) {
-            var specifier = declaration.kind === 239 /* ModuleDeclaration */ ? ts.tryCast(declaration.name, ts.isStringLiteral) : ts.getExternalModuleName(declaration);
-            var moduleSymbol = resolveExternalModuleNameWorker(specifier, specifier, /*moduleNotFoundError*/ undefined); // TODO: GH#18217
+            var specifier = declaration.kind === 239 ? ts.tryCast(declaration.name, ts.isStringLiteral) : ts.getExternalModuleName(declaration);
+            var moduleSymbol = resolveExternalModuleNameWorker(specifier, specifier, undefined);
             if (!moduleSymbol) {
                 return undefined;
             }
-            return ts.getDeclarationOfKind(moduleSymbol, 274 /* SourceFile */);
+            return ts.getDeclarationOfKind(moduleSymbol, 274);
         }
         function initializeTypeChecker() {
-            // Bind all source files and propagate errors
             for (var _i = 0, _a = host.getSourceFiles(); _i < _a.length; _i++) {
                 var file = _a[_i];
                 ts.bindSourceFile(file, compilerOptions);
             }
-            // Initialize global symbol table
             var augmentations;
             for (var _b = 0, _c = host.getSourceFiles(); _b < _c.length; _b++) {
                 var file = _c[_b];
@@ -53744,7 +44596,6 @@ var ts;
                     (augmentations || (augmentations = [])).push(file.moduleAugmentations);
                 }
                 if (file.symbol && file.symbol.globalExports) {
-                    // Merge in UMD exports with first-in-wins semantics (see #9771)
                     var source = file.symbol.globalExports;
                     source.forEach(function (sourceSymbol, id) {
                         if (!globals.has(id)) {
@@ -53753,15 +44604,7 @@ var ts;
                     });
                 }
             }
-            // We do global augmentations separately from module augmentations (and before creating global types) because they
-            //  1. Affect global types. We won't have the correct global types until global augmentations are merged. Also,
-            //  2. Module augmentation instantiation requires creating the type of a module, which, in turn, can require
-            //       checking for an export or property on the module (if export=) which, in turn, can fall back to the
-            //       apparent type of the module - either globalObjectType or globalFunctionType - which wouldn't exist if we
-            //       did module augmentations prior to finalizing the global types.
             if (augmentations) {
-                // merge _global_ module augmentations.
-                // this needs to be done after global symbol table is initialized to make sure that all ambient modules are indexed
                 for (var _d = 0, augmentations_1 = augmentations; _d < augmentations_1.length; _d++) {
                     var list = augmentations_1[_d];
                     for (var _e = 0, list_1 = list; _e < list_1.length; _e++) {
@@ -53772,31 +44615,26 @@ var ts;
                     }
                 }
             }
-            // Setup global builtins
             addToSymbolTable(globals, builtinGlobals, ts.Diagnostics.Declaration_name_conflicts_with_built_in_global_identifier_0);
             getSymbolLinks(undefinedSymbol).type = undefinedWideningType;
-            getSymbolLinks(argumentsSymbol).type = getGlobalType("IArguments", /*arity*/ 0, /*reportErrors*/ true);
+            getSymbolLinks(argumentsSymbol).type = getGlobalType("IArguments", 0, true);
             getSymbolLinks(unknownSymbol).type = errorType;
-            // Initialize special types
-            globalArrayType = getGlobalType("Array", /*arity*/ 1, /*reportErrors*/ true);
-            globalObjectType = getGlobalType("Object", /*arity*/ 0, /*reportErrors*/ true);
-            globalFunctionType = getGlobalType("Function", /*arity*/ 0, /*reportErrors*/ true);
-            globalStringType = getGlobalType("String", /*arity*/ 0, /*reportErrors*/ true);
-            globalNumberType = getGlobalType("Number", /*arity*/ 0, /*reportErrors*/ true);
-            globalBooleanType = getGlobalType("Boolean", /*arity*/ 0, /*reportErrors*/ true);
-            globalRegExpType = getGlobalType("RegExp", /*arity*/ 0, /*reportErrors*/ true);
+            globalArrayType = getGlobalType("Array", 1, true);
+            globalObjectType = getGlobalType("Object", 0, true);
+            globalFunctionType = getGlobalType("Function", 0, true);
+            globalStringType = getGlobalType("String", 0, true);
+            globalNumberType = getGlobalType("Number", 0, true);
+            globalBooleanType = getGlobalType("Boolean", 0, true);
+            globalRegExpType = getGlobalType("RegExp", 0, true);
             anyArrayType = createArrayType(anyType);
             autoArrayType = createArrayType(autoType);
             if (autoArrayType === emptyObjectType) {
-                // autoArrayType is used as a marker, so even if global Array type is not defined, it needs to be a unique type
                 autoArrayType = createAnonymousType(undefined, emptySymbols, ts.emptyArray, ts.emptyArray, undefined, undefined);
             }
-            globalReadonlyArrayType = getGlobalTypeOrUndefined("ReadonlyArray", /*arity*/ 1);
+            globalReadonlyArrayType = getGlobalTypeOrUndefined("ReadonlyArray", 1);
             anyReadonlyArrayType = globalReadonlyArrayType ? createTypeFromGenericGlobalType(globalReadonlyArrayType, [anyType]) : anyArrayType;
-            globalThisType = getGlobalTypeOrUndefined("ThisType", /*arity*/ 1);
+            globalThisType = getGlobalTypeOrUndefined("ThisType", 1);
             if (augmentations) {
-                // merge _nonglobal_ module augmentations.
-                // this needs to be done after global symbol table is initialized to make sure that all ambient modules are indexed
                 for (var _f = 0, augmentations_2 = augmentations; _f < augmentations_2.length; _f++) {
                     var list = augmentations_2[_f];
                     for (var _g = 0, list_2 = list; _g < list_2.length; _g++) {
@@ -53811,14 +44649,14 @@ var ts;
         function checkExternalEmitHelpers(location, helpers) {
             if ((requestedExternalEmitHelpers & helpers) !== helpers && compilerOptions.importHelpers) {
                 var sourceFile = ts.getSourceFileOfNode(location);
-                if (ts.isEffectiveExternalModule(sourceFile, compilerOptions) && !(location.flags & 4194304 /* Ambient */)) {
+                if (ts.isEffectiveExternalModule(sourceFile, compilerOptions) && !(location.flags & 4194304)) {
                     var helpersModule = resolveHelpersModule(sourceFile, location);
                     if (helpersModule !== unknownSymbol) {
                         var uncheckedHelpers = helpers & ~requestedExternalEmitHelpers;
-                        for (var helper = 1 /* FirstEmitHelper */; helper <= 65536 /* LastEmitHelper */; helper <<= 1) {
+                        for (var helper = 1; helper <= 65536; helper <<= 1) {
                             if (uncheckedHelpers & helper) {
                                 var name = getHelperName(helper);
-                                var symbol = getSymbol(helpersModule.exports, ts.escapeLeadingUnderscores(name), 67216319 /* Value */);
+                                var symbol = getSymbol(helpersModule.exports, ts.escapeLeadingUnderscores(name), 67216319);
                                 if (!symbol) {
                                     error(location, ts.Diagnostics.This_syntax_requires_an_imported_helper_named_1_but_module_0_has_no_exported_member_1, ts.externalHelpersModuleNameText, name);
                                 }
@@ -53831,23 +44669,23 @@ var ts;
         }
         function getHelperName(helper) {
             switch (helper) {
-                case 1 /* Extends */: return "__extends";
-                case 2 /* Assign */: return "__assign";
-                case 4 /* Rest */: return "__rest";
-                case 8 /* Decorate */: return "__decorate";
-                case 16 /* Metadata */: return "__metadata";
-                case 32 /* Param */: return "__param";
-                case 64 /* Awaiter */: return "__awaiter";
-                case 128 /* Generator */: return "__generator";
-                case 256 /* Values */: return "__values";
-                case 512 /* Read */: return "__read";
-                case 1024 /* Spread */: return "__spread";
-                case 2048 /* Await */: return "__await";
-                case 4096 /* AsyncGenerator */: return "__asyncGenerator";
-                case 8192 /* AsyncDelegator */: return "__asyncDelegator";
-                case 16384 /* AsyncValues */: return "__asyncValues";
-                case 32768 /* ExportStar */: return "__exportStar";
-                case 65536 /* MakeTemplateObject */: return "__makeTemplateObject";
+                case 1: return "__extends";
+                case 2: return "__assign";
+                case 4: return "__rest";
+                case 8: return "__decorate";
+                case 16: return "__metadata";
+                case 32: return "__param";
+                case 64: return "__awaiter";
+                case 128: return "__generator";
+                case 256: return "__values";
+                case 512: return "__read";
+                case 1024: return "__spread";
+                case 2048: return "__await";
+                case 4096: return "__asyncGenerator";
+                case 8192: return "__asyncDelegator";
+                case 16384: return "__asyncValues";
+                case 32768: return "__exportStar";
+                case 65536: return "__makeTemplateObject";
                 default: return ts.Debug.fail("Unrecognized helper");
             }
         }
@@ -53857,7 +44695,6 @@ var ts;
             }
             return externalHelpersModule;
         }
-        // GRAMMAR CHECKING
         function checkGrammarDecoratorsAndModifiers(node) {
             return checkGrammarDecorators(node) || checkGrammarModifiers(node);
         }
@@ -53866,14 +44703,14 @@ var ts;
                 return false;
             }
             if (!ts.nodeCanBeDecorated(node, node.parent, node.parent.parent)) {
-                if (node.kind === 154 /* MethodDeclaration */ && !ts.nodeIsPresent(node.body)) {
+                if (node.kind === 154 && !ts.nodeIsPresent(node.body)) {
                     return grammarErrorOnFirstToken(node, ts.Diagnostics.A_decorator_can_only_decorate_a_method_implementation_not_an_overload);
                 }
                 else {
                     return grammarErrorOnFirstToken(node, ts.Diagnostics.Decorators_are_not_valid_here);
                 }
             }
-            else if (node.kind === 156 /* GetAccessor */ || node.kind === 157 /* SetAccessor */) {
+            else if (node.kind === 156 || node.kind === 157) {
                 var accessors = ts.getAllAccessorDeclarations(node.parent.members, node);
                 if (accessors.firstAccessor.decorators && node === accessors.secondAccessor) {
                     return grammarErrorOnFirstToken(node, ts.Diagnostics.Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name);
@@ -53887,44 +44724,44 @@ var ts;
                 return quickResult;
             }
             var lastStatic, lastDeclare, lastAsync, lastReadonly;
-            var flags = 0 /* None */;
+            var flags = 0;
             for (var _i = 0, _a = node.modifiers; _i < _a.length; _i++) {
                 var modifier = _a[_i];
-                if (modifier.kind !== 132 /* ReadonlyKeyword */) {
-                    if (node.kind === 151 /* PropertySignature */ || node.kind === 153 /* MethodSignature */) {
+                if (modifier.kind !== 132) {
+                    if (node.kind === 151 || node.kind === 153) {
                         return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_type_member, ts.tokenToString(modifier.kind));
                     }
-                    if (node.kind === 160 /* IndexSignature */) {
+                    if (node.kind === 160) {
                         return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_an_index_signature, ts.tokenToString(modifier.kind));
                     }
                 }
                 switch (modifier.kind) {
-                    case 76 /* ConstKeyword */:
-                        if (node.kind !== 238 /* EnumDeclaration */ && node.parent.kind === 235 /* ClassDeclaration */) {
-                            return grammarErrorOnNode(node, ts.Diagnostics.A_class_member_cannot_have_the_0_keyword, ts.tokenToString(76 /* ConstKeyword */));
+                    case 76:
+                        if (node.kind !== 238 && node.parent.kind === 235) {
+                            return grammarErrorOnNode(node, ts.Diagnostics.A_class_member_cannot_have_the_0_keyword, ts.tokenToString(76));
                         }
                         break;
-                    case 114 /* PublicKeyword */:
-                    case 113 /* ProtectedKeyword */:
-                    case 112 /* PrivateKeyword */:
+                    case 114:
+                    case 113:
+                    case 112:
                         var text = visibilityToString(ts.modifierToFlag(modifier.kind));
-                        if (flags & 28 /* AccessibilityModifier */) {
+                        if (flags & 28) {
                             return grammarErrorOnNode(modifier, ts.Diagnostics.Accessibility_modifier_already_seen);
                         }
-                        else if (flags & 32 /* Static */) {
+                        else if (flags & 32) {
                             return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "static");
                         }
-                        else if (flags & 64 /* Readonly */) {
+                        else if (flags & 64) {
                             return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "readonly");
                         }
-                        else if (flags & 256 /* Async */) {
+                        else if (flags & 256) {
                             return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "async");
                         }
-                        else if (node.parent.kind === 240 /* ModuleBlock */ || node.parent.kind === 274 /* SourceFile */) {
+                        else if (node.parent.kind === 240 || node.parent.kind === 274) {
                             return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_module_or_namespace_element, text);
                         }
-                        else if (flags & 128 /* Abstract */) {
-                            if (modifier.kind === 112 /* PrivateKeyword */) {
+                        else if (flags & 128) {
+                            if (modifier.kind === 112) {
                                 return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, text, "abstract");
                             }
                             else {
@@ -53933,157 +44770,152 @@ var ts;
                         }
                         flags |= ts.modifierToFlag(modifier.kind);
                         break;
-                    case 115 /* StaticKeyword */:
-                        if (flags & 32 /* Static */) {
+                    case 115:
+                        if (flags & 32) {
                             return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "static");
                         }
-                        else if (flags & 64 /* Readonly */) {
+                        else if (flags & 64) {
                             return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "static", "readonly");
                         }
-                        else if (flags & 256 /* Async */) {
+                        else if (flags & 256) {
                             return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "static", "async");
                         }
-                        else if (node.parent.kind === 240 /* ModuleBlock */ || node.parent.kind === 274 /* SourceFile */) {
+                        else if (node.parent.kind === 240 || node.parent.kind === 274) {
                             return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_module_or_namespace_element, "static");
                         }
-                        else if (node.kind === 149 /* Parameter */) {
+                        else if (node.kind === 149) {
                             return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "static");
                         }
-                        else if (flags & 128 /* Abstract */) {
+                        else if (flags & 128) {
                             return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "static", "abstract");
                         }
-                        flags |= 32 /* Static */;
+                        flags |= 32;
                         lastStatic = modifier;
                         break;
-                    case 132 /* ReadonlyKeyword */:
-                        if (flags & 64 /* Readonly */) {
+                    case 132:
+                        if (flags & 64) {
                             return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "readonly");
                         }
-                        else if (node.kind !== 152 /* PropertyDeclaration */ && node.kind !== 151 /* PropertySignature */ && node.kind !== 160 /* IndexSignature */ && node.kind !== 149 /* Parameter */) {
-                            // If node.kind === SyntaxKind.Parameter, checkParameter report an error if it's not a parameter property.
+                        else if (node.kind !== 152 && node.kind !== 151 && node.kind !== 160 && node.kind !== 149) {
                             return grammarErrorOnNode(modifier, ts.Diagnostics.readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature);
                         }
-                        flags |= 64 /* Readonly */;
+                        flags |= 64;
                         lastReadonly = modifier;
                         break;
-                    case 84 /* ExportKeyword */:
-                        if (flags & 1 /* Export */) {
+                    case 84:
+                        if (flags & 1) {
                             return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "export");
                         }
-                        else if (flags & 2 /* Ambient */) {
+                        else if (flags & 2) {
                             return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "declare");
                         }
-                        else if (flags & 128 /* Abstract */) {
+                        else if (flags & 128) {
                             return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "abstract");
                         }
-                        else if (flags & 256 /* Async */) {
+                        else if (flags & 256) {
                             return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "async");
                         }
-                        else if (node.parent.kind === 235 /* ClassDeclaration */) {
+                        else if (node.parent.kind === 235) {
                             return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_class_element, "export");
                         }
-                        else if (node.kind === 149 /* Parameter */) {
+                        else if (node.kind === 149) {
                             return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "export");
                         }
-                        flags |= 1 /* Export */;
+                        flags |= 1;
                         break;
-                    case 79 /* DefaultKeyword */:
-                        var container = node.parent.kind === 274 /* SourceFile */ ? node.parent : node.parent.parent;
-                        if (container.kind === 239 /* ModuleDeclaration */ && !ts.isAmbientModule(container)) {
+                    case 79:
+                        var container = node.parent.kind === 274 ? node.parent : node.parent.parent;
+                        if (container.kind === 239 && !ts.isAmbientModule(container)) {
                             return grammarErrorOnNode(modifier, ts.Diagnostics.A_default_export_can_only_be_used_in_an_ECMAScript_style_module);
                         }
-                        flags |= 512 /* Default */;
+                        flags |= 512;
                         break;
-                    case 124 /* DeclareKeyword */:
-                        if (flags & 2 /* Ambient */) {
+                    case 124:
+                        if (flags & 2) {
                             return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "declare");
                         }
-                        else if (flags & 256 /* Async */) {
+                        else if (flags & 256) {
                             return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_in_an_ambient_context, "async");
                         }
-                        else if (node.parent.kind === 235 /* ClassDeclaration */) {
+                        else if (node.parent.kind === 235) {
                             return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_class_element, "declare");
                         }
-                        else if (node.kind === 149 /* Parameter */) {
+                        else if (node.kind === 149) {
                             return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "declare");
                         }
-                        else if ((node.parent.flags & 4194304 /* Ambient */) && node.parent.kind === 240 /* ModuleBlock */) {
+                        else if ((node.parent.flags & 4194304) && node.parent.kind === 240) {
                             return grammarErrorOnNode(modifier, ts.Diagnostics.A_declare_modifier_cannot_be_used_in_an_already_ambient_context);
                         }
-                        flags |= 2 /* Ambient */;
+                        flags |= 2;
                         lastDeclare = modifier;
                         break;
-                    case 117 /* AbstractKeyword */:
-                        if (flags & 128 /* Abstract */) {
+                    case 117:
+                        if (flags & 128) {
                             return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "abstract");
                         }
-                        if (node.kind !== 235 /* ClassDeclaration */) {
-                            if (node.kind !== 154 /* MethodDeclaration */ &&
-                                node.kind !== 152 /* PropertyDeclaration */ &&
-                                node.kind !== 156 /* GetAccessor */ &&
-                                node.kind !== 157 /* SetAccessor */) {
+                        if (node.kind !== 235) {
+                            if (node.kind !== 154 &&
+                                node.kind !== 152 &&
+                                node.kind !== 156 &&
+                                node.kind !== 157) {
                                 return grammarErrorOnNode(modifier, ts.Diagnostics.abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration);
                             }
-                            if (!(node.parent.kind === 235 /* ClassDeclaration */ && ts.hasModifier(node.parent, 128 /* Abstract */))) {
+                            if (!(node.parent.kind === 235 && ts.hasModifier(node.parent, 128))) {
                                 return grammarErrorOnNode(modifier, ts.Diagnostics.Abstract_methods_can_only_appear_within_an_abstract_class);
                             }
-                            if (flags & 32 /* Static */) {
+                            if (flags & 32) {
                                 return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "static", "abstract");
                             }
-                            if (flags & 8 /* Private */) {
+                            if (flags & 8) {
                                 return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "private", "abstract");
                             }
                         }
-                        flags |= 128 /* Abstract */;
+                        flags |= 128;
                         break;
-                    case 120 /* AsyncKeyword */:
-                        if (flags & 256 /* Async */) {
+                    case 120:
+                        if (flags & 256) {
                             return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "async");
                         }
-                        else if (flags & 2 /* Ambient */ || node.parent.flags & 4194304 /* Ambient */) {
+                        else if (flags & 2 || node.parent.flags & 4194304) {
                             return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_in_an_ambient_context, "async");
                         }
-                        else if (node.kind === 149 /* Parameter */) {
+                        else if (node.kind === 149) {
                             return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "async");
                         }
-                        flags |= 256 /* Async */;
+                        flags |= 256;
                         lastAsync = modifier;
                         break;
                 }
             }
-            if (node.kind === 155 /* Constructor */) {
-                if (flags & 32 /* Static */) {
+            if (node.kind === 155) {
+                if (flags & 32) {
                     return grammarErrorOnNode(lastStatic, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "static");
                 }
-                if (flags & 128 /* Abstract */) {
-                    return grammarErrorOnNode(lastStatic, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "abstract"); // TODO: GH#18217
+                if (flags & 128) {
+                    return grammarErrorOnNode(lastStatic, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "abstract");
                 }
-                else if (flags & 256 /* Async */) {
+                else if (flags & 256) {
                     return grammarErrorOnNode(lastAsync, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "async");
                 }
-                else if (flags & 64 /* Readonly */) {
+                else if (flags & 64) {
                     return grammarErrorOnNode(lastReadonly, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "readonly");
                 }
                 return false;
             }
-            else if ((node.kind === 244 /* ImportDeclaration */ || node.kind === 243 /* ImportEqualsDeclaration */) && flags & 2 /* Ambient */) {
+            else if ((node.kind === 244 || node.kind === 243) && flags & 2) {
                 return grammarErrorOnNode(lastDeclare, ts.Diagnostics.A_0_modifier_cannot_be_used_with_an_import_declaration, "declare");
             }
-            else if (node.kind === 149 /* Parameter */ && (flags & 92 /* ParameterPropertyModifier */) && ts.isBindingPattern(node.name)) {
+            else if (node.kind === 149 && (flags & 92) && ts.isBindingPattern(node.name)) {
                 return grammarErrorOnNode(node, ts.Diagnostics.A_parameter_property_may_not_be_declared_using_a_binding_pattern);
             }
-            else if (node.kind === 149 /* Parameter */ && (flags & 92 /* ParameterPropertyModifier */) && node.dotDotDotToken) {
+            else if (node.kind === 149 && (flags & 92) && node.dotDotDotToken) {
                 return grammarErrorOnNode(node, ts.Diagnostics.A_parameter_property_cannot_be_declared_using_a_rest_parameter);
             }
-            if (flags & 256 /* Async */) {
+            if (flags & 256) {
                 return checkGrammarAsyncModifier(node, lastAsync);
             }
             return false;
         }
-        /**
-         * true | false: Early return this value from checkGrammarModifiers.
-         * undefined: Need to do full checking on the modifiers.
-         */
         function reportObviousModifierErrors(node) {
             return !node.modifiers
                 ? false
@@ -54093,38 +44925,38 @@ var ts;
         }
         function shouldReportBadModifier(node) {
             switch (node.kind) {
-                case 156 /* GetAccessor */:
-                case 157 /* SetAccessor */:
-                case 155 /* Constructor */:
-                case 152 /* PropertyDeclaration */:
-                case 151 /* PropertySignature */:
-                case 154 /* MethodDeclaration */:
-                case 153 /* MethodSignature */:
-                case 160 /* IndexSignature */:
-                case 239 /* ModuleDeclaration */:
-                case 244 /* ImportDeclaration */:
-                case 243 /* ImportEqualsDeclaration */:
-                case 250 /* ExportDeclaration */:
-                case 249 /* ExportAssignment */:
-                case 192 /* FunctionExpression */:
-                case 193 /* ArrowFunction */:
-                case 149 /* Parameter */:
+                case 156:
+                case 157:
+                case 155:
+                case 152:
+                case 151:
+                case 154:
+                case 153:
+                case 160:
+                case 239:
+                case 244:
+                case 243:
+                case 250:
+                case 249:
+                case 192:
+                case 193:
+                case 149:
                     return false;
                 default:
-                    if (node.parent.kind === 240 /* ModuleBlock */ || node.parent.kind === 274 /* SourceFile */) {
+                    if (node.parent.kind === 240 || node.parent.kind === 274) {
                         return false;
                     }
                     switch (node.kind) {
-                        case 234 /* FunctionDeclaration */:
-                            return nodeHasAnyModifiersExcept(node, 120 /* AsyncKeyword */);
-                        case 235 /* ClassDeclaration */:
-                            return nodeHasAnyModifiersExcept(node, 117 /* AbstractKeyword */);
-                        case 236 /* InterfaceDeclaration */:
-                        case 214 /* VariableStatement */:
-                        case 237 /* TypeAliasDeclaration */:
+                        case 234:
+                            return nodeHasAnyModifiersExcept(node, 120);
+                        case 235:
+                            return nodeHasAnyModifiersExcept(node, 117);
+                        case 236:
+                        case 214:
+                        case 237:
                             return true;
-                        case 238 /* EnumDeclaration */:
-                            return nodeHasAnyModifiersExcept(node, 76 /* ConstKeyword */);
+                        case 238:
+                            return nodeHasAnyModifiersExcept(node, 76);
                         default:
                             ts.Debug.fail();
                             return false;
@@ -54136,10 +44968,10 @@ var ts;
         }
         function checkGrammarAsyncModifier(node, asyncModifier) {
             switch (node.kind) {
-                case 154 /* MethodDeclaration */:
-                case 234 /* FunctionDeclaration */:
-                case 192 /* FunctionExpression */:
-                case 193 /* ArrowFunction */:
+                case 154:
+                case 234:
+                case 192:
+                case 193:
                     return false;
             }
             return grammarErrorOnNode(asyncModifier, ts.Diagnostics._0_modifier_cannot_be_used_here, "async");
@@ -54168,7 +45000,7 @@ var ts;
                     if (i !== (parameterCount - 1)) {
                         return grammarErrorOnNode(parameter.dotDotDotToken, ts.Diagnostics.A_rest_parameter_must_be_last_in_a_parameter_list);
                     }
-                    if (!(parameter.flags & 4194304 /* Ambient */)) { // Allow `...foo,` in ambient declarations; see GH#23070
+                    if (!(parameter.flags & 4194304)) {
                         checkGrammarForDisallowedTrailingComma(parameters, ts.Diagnostics.A_rest_parameter_or_binding_pattern_may_not_have_a_trailing_comma);
                     }
                     if (ts.isBindingPattern(parameter.name)) {
@@ -54193,7 +45025,6 @@ var ts;
             }
         }
         function checkGrammarFunctionLikeDeclaration(node) {
-            // Prevent cascading error by short-circuit
             var file = ts.getSourceFileOfNode(node);
             return checkGrammarDecoratorsAndModifiers(node) || checkGrammarTypeParameterList(node.typeParameters, file) ||
                 checkGrammarParameterList(node.parameters) || checkGrammarArrowFunction(node, file);
@@ -54236,12 +45067,12 @@ var ts;
             if (!parameter.type) {
                 return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_must_have_a_type_annotation);
             }
-            if (parameter.type.kind !== 137 /* StringKeyword */ && parameter.type.kind !== 134 /* NumberKeyword */) {
+            if (parameter.type.kind !== 137 && parameter.type.kind !== 134) {
                 var type = getTypeFromTypeNode(parameter.type);
-                if (type.flags & 4 /* String */ || type.flags & 8 /* Number */) {
+                if (type.flags & 4 || type.flags & 8) {
                     return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_type_cannot_be_a_type_alias_Consider_writing_0_Colon_1_Colon_2_instead, ts.getTextOfNode(parameter.name), typeToString(type), typeToString(getTypeFromTypeNode(node.type)));
                 }
-                if (type.flags & 262144 /* Union */ && allTypesAssignableToKind(type, 64 /* StringLiteral */, /*strict*/ true)) {
+                if (type.flags & 262144 && allTypesAssignableToKind(type, 64, true)) {
                     return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_type_cannot_be_a_union_type_Consider_using_a_mapped_object_type_instead);
                 }
                 return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_type_must_be_string_or_number);
@@ -54252,7 +45083,6 @@ var ts;
             return false;
         }
         function checkGrammarIndexSignature(node) {
-            // Prevent cascading error by short-circuit
             return checkGrammarDecoratorsAndModifiers(node) || checkGrammarIndexSignatureParameters(node);
         }
         function checkGrammarForAtLeastOneTypeArgument(node, typeArguments) {
@@ -54270,9 +45100,9 @@ var ts;
         }
         function checkGrammarForOmittedArgument(args) {
             if (args) {
-                for (var _i = 0, args_2 = args; _i < args_2.length; _i++) {
-                    var arg = args_2[_i];
-                    if (arg.kind === 206 /* OmittedExpression */) {
+                for (var _i = 0, args_5 = args; _i < args_5.length; _i++) {
+                    var arg = args_5[_i];
+                    if (arg.kind === 206) {
                         return grammarErrorAtPos(arg, arg.pos, 0, ts.Diagnostics.Argument_expression_expected);
                     }
                 }
@@ -54302,7 +45132,7 @@ var ts;
             if (!checkGrammarDecoratorsAndModifiers(node) && node.heritageClauses) {
                 for (var _i = 0, _a = node.heritageClauses; _i < _a.length; _i++) {
                     var heritageClause = _a[_i];
-                    if (heritageClause.token === 85 /* ExtendsKeyword */) {
+                    if (heritageClause.token === 85) {
                         if (seenExtendsClause) {
                             return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.extends_clause_already_seen);
                         }
@@ -54315,13 +45145,12 @@ var ts;
                         seenExtendsClause = true;
                     }
                     else {
-                        ts.Debug.assert(heritageClause.token === 108 /* ImplementsKeyword */);
+                        ts.Debug.assert(heritageClause.token === 108);
                         if (seenImplementsClause) {
                             return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.implements_clause_already_seen);
                         }
                         seenImplementsClause = true;
                     }
-                    // Grammar checking heritageClause inside class declaration
                     checkGrammarHeritageClause(heritageClause);
                 }
             }
@@ -54331,39 +45160,37 @@ var ts;
             if (node.heritageClauses) {
                 for (var _i = 0, _a = node.heritageClauses; _i < _a.length; _i++) {
                     var heritageClause = _a[_i];
-                    if (heritageClause.token === 85 /* ExtendsKeyword */) {
+                    if (heritageClause.token === 85) {
                         if (seenExtendsClause) {
                             return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.extends_clause_already_seen);
                         }
                         seenExtendsClause = true;
                     }
                     else {
-                        ts.Debug.assert(heritageClause.token === 108 /* ImplementsKeyword */);
+                        ts.Debug.assert(heritageClause.token === 108);
                         return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.Interface_declaration_cannot_have_implements_clause);
                     }
-                    // Grammar checking heritageClause inside class declaration
                     checkGrammarHeritageClause(heritageClause);
                 }
             }
             return false;
         }
         function checkGrammarComputedPropertyName(node) {
-            // If node is not a computedPropertyName, just skip the grammar checking
-            if (node.kind !== 147 /* ComputedPropertyName */) {
+            if (node.kind !== 147) {
                 return false;
             }
             var computedPropertyName = node;
-            if (computedPropertyName.expression.kind === 200 /* BinaryExpression */ && computedPropertyName.expression.operatorToken.kind === 26 /* CommaToken */) {
+            if (computedPropertyName.expression.kind === 200 && computedPropertyName.expression.operatorToken.kind === 26) {
                 return grammarErrorOnNode(computedPropertyName.expression, ts.Diagnostics.A_comma_expression_is_not_allowed_in_a_computed_property_name);
             }
             return false;
         }
         function checkGrammarForGenerator(node) {
             if (node.asteriskToken) {
-                ts.Debug.assert(node.kind === 234 /* FunctionDeclaration */ ||
-                    node.kind === 192 /* FunctionExpression */ ||
-                    node.kind === 154 /* MethodDeclaration */);
-                if (node.flags & 4194304 /* Ambient */) {
+                ts.Debug.assert(node.kind === 234 ||
+                    node.kind === 192 ||
+                    node.kind === 154);
+                if (node.flags & 4194304) {
                     return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.Generators_are_not_allowed_in_an_ambient_context);
                 }
                 if (!node.body) {
@@ -54375,64 +45202,43 @@ var ts;
             return !!questionToken && grammarErrorOnNode(questionToken, message);
         }
         function checkGrammarObjectLiteralExpression(node, inDestructuring) {
-            var Flags;
-            (function (Flags) {
-                Flags[Flags["Property"] = 1] = "Property";
-                Flags[Flags["GetAccessor"] = 2] = "GetAccessor";
-                Flags[Flags["SetAccessor"] = 4] = "SetAccessor";
-                Flags[Flags["GetOrSetAccessor"] = 6] = "GetOrSetAccessor";
-            })(Flags || (Flags = {}));
             var seen = ts.createUnderscoreEscapedMap();
             for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
                 var prop = _a[_i];
-                if (prop.kind === 272 /* SpreadAssignment */) {
+                if (prop.kind === 272) {
                     continue;
                 }
                 var name = prop.name;
-                if (name.kind === 147 /* ComputedPropertyName */) {
-                    // If the name is not a ComputedPropertyName, the grammar checking will skip it
+                if (name.kind === 147) {
                     checkGrammarComputedPropertyName(name);
                 }
-                if (prop.kind === 271 /* ShorthandPropertyAssignment */ && !inDestructuring && prop.objectAssignmentInitializer) {
-                    // having objectAssignmentInitializer is only valid in ObjectAssignmentPattern
-                    // outside of destructuring it is a syntax error
+                if (prop.kind === 271 && !inDestructuring && prop.objectAssignmentInitializer) {
                     return grammarErrorOnNode(prop.equalsToken, ts.Diagnostics.can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment);
                 }
-                // Modifiers are never allowed on properties except for 'async' on a method declaration
                 if (prop.modifiers) {
-                    for (var _b = 0, _c = prop.modifiers; _b < _c.length; _b++) { // TODO: GH#19955
+                    for (var _b = 0, _c = prop.modifiers; _b < _c.length; _b++) {
                         var mod = _c[_b];
-                        if (mod.kind !== 120 /* AsyncKeyword */ || prop.kind !== 154 /* MethodDeclaration */) {
+                        if (mod.kind !== 120 || prop.kind !== 154) {
                             grammarErrorOnNode(mod, ts.Diagnostics._0_modifier_cannot_be_used_here, ts.getTextOfNode(mod));
                         }
                     }
                 }
-                // ECMA-262 11.1.5 Object Initializer
-                // If previous is not undefined then throw a SyntaxError exception if any of the following conditions are true
-                // a.This production is contained in strict code and IsDataDescriptor(previous) is true and
-                // IsDataDescriptor(propId.descriptor) is true.
-                //    b.IsDataDescriptor(previous) is true and IsAccessorDescriptor(propId.descriptor) is true.
-                //    c.IsAccessorDescriptor(previous) is true and IsDataDescriptor(propId.descriptor) is true.
-                //    d.IsAccessorDescriptor(previous) is true and IsAccessorDescriptor(propId.descriptor) is true
-                // and either both previous and propId.descriptor have[[Get]] fields or both previous and propId.descriptor have[[Set]] fields
                 var currentKind = void 0;
                 switch (prop.kind) {
-                    case 270 /* PropertyAssignment */:
-                    case 271 /* ShorthandPropertyAssignment */:
-                        // Grammar checking for computedPropertyName and shorthandPropertyAssignment
+                    case 270:
+                    case 271:
                         checkGrammarForInvalidQuestionMark(prop.questionToken, ts.Diagnostics.An_object_member_cannot_be_declared_optional);
-                        if (name.kind === 8 /* NumericLiteral */) {
+                        if (name.kind === 8) {
                             checkGrammarNumericLiteral(name);
                         }
-                    // falls through
-                    case 154 /* MethodDeclaration */:
-                        currentKind = 1 /* Property */;
+                    case 154:
+                        currentKind = 1;
                         break;
-                    case 156 /* GetAccessor */:
-                        currentKind = 2 /* GetAccessor */;
+                    case 156:
+                        currentKind = 2;
                         break;
-                    case 157 /* SetAccessor */:
-                        currentKind = 4 /* SetAccessor */;
+                    case 157:
+                        currentKind = 4;
                         break;
                     default:
                         throw ts.Debug.assertNever(prop, "Unexpected syntax kind:" + prop.kind);
@@ -54446,11 +45252,11 @@ var ts;
                     seen.set(effectiveName, currentKind);
                 }
                 else {
-                    if (currentKind === 1 /* Property */ && existingKind === 1 /* Property */) {
+                    if (currentKind === 1 && existingKind === 1) {
                         grammarErrorOnNode(name, ts.Diagnostics.Duplicate_identifier_0, ts.getTextOfNode(name));
                     }
-                    else if ((currentKind & 6 /* GetOrSetAccessor */) && (existingKind & 6 /* GetOrSetAccessor */)) {
-                        if (existingKind !== 6 /* GetOrSetAccessor */ && currentKind !== existingKind) {
+                    else if ((currentKind & 6) && (existingKind & 6)) {
+                        if (existingKind !== 6 && currentKind !== existingKind) {
                             seen.set(effectiveName, currentKind | existingKind);
                         }
                         else {
@@ -54468,7 +45274,7 @@ var ts;
             var seen = ts.createUnderscoreEscapedMap();
             for (var _i = 0, _a = node.attributes.properties; _i < _a.length; _i++) {
                 var attr = _a[_i];
-                if (attr.kind === 264 /* JsxSpreadAttribute */) {
+                if (attr.kind === 264) {
                     continue;
                 }
                 var name = attr.name, initializer = attr.initializer;
@@ -54478,7 +45284,7 @@ var ts;
                 else {
                     return grammarErrorOnNode(name, ts.Diagnostics.JSX_elements_cannot_have_multiple_attributes_with_the_same_name);
                 }
-                if (initializer && initializer.kind === 265 /* JsxExpression */ && !initializer.expression) {
+                if (initializer && initializer.kind === 265 && !initializer.expression) {
                     return grammarErrorOnNode(initializer, ts.Diagnostics.JSX_attributes_must_only_be_assigned_a_non_empty_expression);
                 }
             }
@@ -54487,40 +45293,33 @@ var ts;
             if (checkGrammarStatementInAmbientContext(forInOrOfStatement)) {
                 return true;
             }
-            if (forInOrOfStatement.kind === 222 /* ForOfStatement */ && forInOrOfStatement.awaitModifier) {
-                if ((forInOrOfStatement.flags & 16384 /* AwaitContext */) === 0 /* None */) {
+            if (forInOrOfStatement.kind === 222 && forInOrOfStatement.awaitModifier) {
+                if ((forInOrOfStatement.flags & 16384) === 0) {
                     return grammarErrorOnNode(forInOrOfStatement.awaitModifier, ts.Diagnostics.A_for_await_of_statement_is_only_allowed_within_an_async_function_or_async_generator);
                 }
             }
-            if (forInOrOfStatement.initializer.kind === 233 /* VariableDeclarationList */) {
+            if (forInOrOfStatement.initializer.kind === 233) {
                 var variableList = forInOrOfStatement.initializer;
                 if (!checkGrammarVariableDeclarationList(variableList)) {
                     var declarations = variableList.declarations;
-                    // declarations.length can be zero if there is an error in variable declaration in for-of or for-in
-                    // See http://www.ecma-international.org/ecma-262/6.0/#sec-for-in-and-for-of-statements for details
-                    // For example:
-                    //      var let = 10;
-                    //      for (let of [1,2,3]) {} // this is invalid ES6 syntax
-                    //      for (let in [1,2,3]) {} // this is invalid ES6 syntax
-                    // We will then want to skip on grammar checking on variableList declaration
                     if (!declarations.length) {
                         return false;
                     }
                     if (declarations.length > 1) {
-                        var diagnostic = forInOrOfStatement.kind === 221 /* ForInStatement */
+                        var diagnostic = forInOrOfStatement.kind === 221
                             ? ts.Diagnostics.Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement
                             : ts.Diagnostics.Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement;
                         return grammarErrorOnFirstToken(variableList.declarations[1], diagnostic);
                     }
                     var firstDeclaration = declarations[0];
                     if (firstDeclaration.initializer) {
-                        var diagnostic = forInOrOfStatement.kind === 221 /* ForInStatement */
+                        var diagnostic = forInOrOfStatement.kind === 221
                             ? ts.Diagnostics.The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer
                             : ts.Diagnostics.The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer;
                         return grammarErrorOnNode(firstDeclaration.name, diagnostic);
                     }
                     if (firstDeclaration.type) {
-                        var diagnostic = forInOrOfStatement.kind === 221 /* ForInStatement */
+                        var diagnostic = forInOrOfStatement.kind === 221
                             ? ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation
                             : ts.Diagnostics.The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation;
                         return grammarErrorOnNode(firstDeclaration, diagnostic);
@@ -54531,27 +45330,27 @@ var ts;
         }
         function checkGrammarAccessor(accessor) {
             var kind = accessor.kind;
-            if (languageVersion < 1 /* ES5 */) {
+            if (languageVersion < 1) {
                 return grammarErrorOnNode(accessor.name, ts.Diagnostics.Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher);
             }
-            else if (accessor.flags & 4194304 /* Ambient */) {
+            else if (accessor.flags & 4194304) {
                 return grammarErrorOnNode(accessor.name, ts.Diagnostics.An_accessor_cannot_be_declared_in_an_ambient_context);
             }
-            else if (accessor.body === undefined && !ts.hasModifier(accessor, 128 /* Abstract */)) {
+            else if (accessor.body === undefined && !ts.hasModifier(accessor, 128)) {
                 return grammarErrorAtPos(accessor, accessor.end - 1, ";".length, ts.Diagnostics._0_expected, "{");
             }
-            else if (accessor.body && ts.hasModifier(accessor, 128 /* Abstract */)) {
+            else if (accessor.body && ts.hasModifier(accessor, 128)) {
                 return grammarErrorOnNode(accessor, ts.Diagnostics.An_abstract_accessor_cannot_have_an_implementation);
             }
             else if (accessor.typeParameters) {
                 return grammarErrorOnNode(accessor.name, ts.Diagnostics.An_accessor_cannot_have_type_parameters);
             }
             else if (!doesAccessorHaveCorrectParameterCount(accessor)) {
-                return grammarErrorOnNode(accessor.name, kind === 156 /* GetAccessor */ ?
+                return grammarErrorOnNode(accessor.name, kind === 156 ?
                     ts.Diagnostics.A_get_accessor_cannot_have_parameters :
                     ts.Diagnostics.A_set_accessor_must_have_exactly_one_parameter);
             }
-            else if (kind === 157 /* SetAccessor */) {
+            else if (kind === 157) {
                 if (accessor.type) {
                     return grammarErrorOnNode(accessor.name, ts.Diagnostics.A_set_accessor_cannot_have_a_return_type_annotation);
                 }
@@ -54570,45 +45369,41 @@ var ts;
             }
             return false;
         }
-        /** Does the accessor have the right number of parameters?
-         * A get accessor has no parameters or a single `this` parameter.
-         * A set accessor has one parameter or a `this` parameter and one more parameter.
-         */
         function doesAccessorHaveCorrectParameterCount(accessor) {
-            return getAccessorThisParameter(accessor) || accessor.parameters.length === (accessor.kind === 156 /* GetAccessor */ ? 0 : 1);
+            return getAccessorThisParameter(accessor) || accessor.parameters.length === (accessor.kind === 156 ? 0 : 1);
         }
         function getAccessorThisParameter(accessor) {
-            if (accessor.parameters.length === (accessor.kind === 156 /* GetAccessor */ ? 1 : 2)) {
+            if (accessor.parameters.length === (accessor.kind === 156 ? 1 : 2)) {
                 return ts.getThisParameter(accessor);
             }
         }
         function checkGrammarTypeOperatorNode(node) {
-            if (node.operator === 141 /* UniqueKeyword */) {
-                if (node.type.kind !== 138 /* SymbolKeyword */) {
-                    return grammarErrorOnNode(node.type, ts.Diagnostics._0_expected, ts.tokenToString(138 /* SymbolKeyword */));
+            if (node.operator === 141) {
+                if (node.type.kind !== 138) {
+                    return grammarErrorOnNode(node.type, ts.Diagnostics._0_expected, ts.tokenToString(138));
                 }
                 var parent = ts.walkUpParenthesizedTypes(node.parent);
                 switch (parent.kind) {
-                    case 232 /* VariableDeclaration */:
+                    case 232:
                         var decl = parent;
-                        if (decl.name.kind !== 71 /* Identifier */) {
+                        if (decl.name.kind !== 71) {
                             return grammarErrorOnNode(node, ts.Diagnostics.unique_symbol_types_may_not_be_used_on_a_variable_declaration_with_a_binding_name);
                         }
                         if (!ts.isVariableDeclarationInVariableStatement(decl)) {
                             return grammarErrorOnNode(node, ts.Diagnostics.unique_symbol_types_are_only_allowed_on_variables_in_a_variable_statement);
                         }
-                        if (!(decl.parent.flags & 2 /* Const */)) {
+                        if (!(decl.parent.flags & 2)) {
                             return grammarErrorOnNode(parent.name, ts.Diagnostics.A_variable_whose_type_is_a_unique_symbol_type_must_be_const);
                         }
                         break;
-                    case 152 /* PropertyDeclaration */:
-                        if (!ts.hasModifier(parent, 32 /* Static */) ||
-                            !ts.hasModifier(parent, 64 /* Readonly */)) {
+                    case 152:
+                        if (!ts.hasModifier(parent, 32) ||
+                            !ts.hasModifier(parent, 64)) {
                             return grammarErrorOnNode(parent.name, ts.Diagnostics.A_property_of_a_class_whose_type_is_a_unique_symbol_type_must_be_both_static_and_readonly);
                         }
                         break;
-                    case 151 /* PropertySignature */:
-                        if (!ts.hasModifier(parent, 64 /* Readonly */)) {
+                    case 151:
+                        if (!ts.hasModifier(parent, 64)) {
                             return grammarErrorOnNode(parent.name, ts.Diagnostics.A_property_of_an_interface_or_type_literal_whose_type_is_a_unique_symbol_type_must_be_readonly);
                         }
                         break;
@@ -54626,10 +45421,9 @@ var ts;
             if (checkGrammarFunctionLikeDeclaration(node)) {
                 return true;
             }
-            if (node.kind === 154 /* MethodDeclaration */) {
-                if (node.parent.kind === 184 /* ObjectLiteralExpression */) {
-                    // We only disallow modifier on a method declaration if it is a property of object-literal-expression
-                    if (node.modifiers && !(node.modifiers.length === 1 && ts.first(node.modifiers).kind === 120 /* AsyncKeyword */)) {
+            if (node.kind === 154) {
+                if (node.parent.kind === 184) {
+                    if (node.modifiers && !(node.modifiers.length === 1 && ts.first(node.modifiers).kind === 120)) {
                         return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
                     }
                     else if (checkGrammarForInvalidQuestionMark(node.questionToken, ts.Diagnostics.An_object_member_cannot_be_declared_optional)) {
@@ -54644,22 +45438,17 @@ var ts;
                 }
             }
             if (ts.isClassLike(node.parent)) {
-                // Technically, computed properties in ambient contexts is disallowed
-                // for property declarations and accessors too, not just methods.
-                // However, property declarations disallow computed names in general,
-                // and accessors are not allowed in ambient contexts in general,
-                // so this error only really matters for methods.
-                if (node.flags & 4194304 /* Ambient */) {
+                if (node.flags & 4194304) {
                     return checkGrammarForInvalidDynamicName(node.name, ts.Diagnostics.A_computed_property_name_in_an_ambient_context_must_refer_to_an_expression_whose_type_is_a_literal_type_or_a_unique_symbol_type);
                 }
-                else if (node.kind === 154 /* MethodDeclaration */ && !node.body) {
+                else if (node.kind === 154 && !node.body) {
                     return checkGrammarForInvalidDynamicName(node.name, ts.Diagnostics.A_computed_property_name_in_a_method_overload_must_refer_to_an_expression_whose_type_is_a_literal_type_or_a_unique_symbol_type);
                 }
             }
-            else if (node.parent.kind === 236 /* InterfaceDeclaration */) {
+            else if (node.parent.kind === 236) {
                 return checkGrammarForInvalidDynamicName(node.name, ts.Diagnostics.A_computed_property_name_in_an_interface_must_refer_to_an_expression_whose_type_is_a_literal_type_or_a_unique_symbol_type);
             }
-            else if (node.parent.kind === 166 /* TypeLiteral */) {
+            else if (node.parent.kind === 166) {
                 return checkGrammarForInvalidDynamicName(node.name, ts.Diagnostics.A_computed_property_name_in_a_type_literal_must_refer_to_an_expression_whose_type_is_a_literal_type_or_a_unique_symbol_type);
             }
         }
@@ -54670,27 +45459,23 @@ var ts;
                     return grammarErrorOnNode(node, ts.Diagnostics.Jump_target_cannot_cross_function_boundary);
                 }
                 switch (current.kind) {
-                    case 228 /* LabeledStatement */:
+                    case 228:
                         if (node.label && current.label.escapedText === node.label.escapedText) {
-                            // found matching label - verify that label usage is correct
-                            // continue can only target labels that are on iteration statements
-                            var isMisplacedContinueLabel = node.kind === 223 /* ContinueStatement */
-                                && !ts.isIterationStatement(current.statement, /*lookInLabeledStatement*/ true);
+                            var isMisplacedContinueLabel = node.kind === 223
+                                && !ts.isIterationStatement(current.statement, true);
                             if (isMisplacedContinueLabel) {
                                 return grammarErrorOnNode(node, ts.Diagnostics.A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement);
                             }
                             return false;
                         }
                         break;
-                    case 227 /* SwitchStatement */:
-                        if (node.kind === 224 /* BreakStatement */ && !node.label) {
-                            // unlabeled break within switch statement - ok
+                    case 227:
+                        if (node.kind === 224 && !node.label) {
                             return false;
                         }
                         break;
                     default:
-                        if (ts.isIterationStatement(current, /*lookInLabeledStatement*/ false) && !node.label) {
-                            // unlabeled break or continue within iteration statement - ok
+                        if (ts.isIterationStatement(current, false) && !node.label) {
                             return false;
                         }
                         break;
@@ -54698,13 +45483,13 @@ var ts;
                 current = current.parent;
             }
             if (node.label) {
-                var message = node.kind === 224 /* BreakStatement */
+                var message = node.kind === 224
                     ? ts.Diagnostics.A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement
                     : ts.Diagnostics.A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement;
                 return grammarErrorOnNode(node, message);
             }
             else {
-                var message = node.kind === 224 /* BreakStatement */
+                var message = node.kind === 224
                     ? ts.Diagnostics.A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement
                     : ts.Diagnostics.A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement;
                 return grammarErrorOnNode(node, message);
@@ -54717,26 +45502,25 @@ var ts;
                     return grammarErrorOnNode(node, ts.Diagnostics.A_rest_element_must_be_last_in_a_destructuring_pattern);
                 }
                 checkGrammarForDisallowedTrailingComma(elements, ts.Diagnostics.A_rest_parameter_or_binding_pattern_may_not_have_a_trailing_comma);
-                if (node.name.kind === 181 /* ArrayBindingPattern */ || node.name.kind === 180 /* ObjectBindingPattern */) {
+                if (node.name.kind === 181 || node.name.kind === 180) {
                     return grammarErrorOnNode(node.name, ts.Diagnostics.A_rest_element_cannot_contain_a_binding_pattern);
                 }
                 if (node.propertyName) {
                     return grammarErrorOnNode(node.name, ts.Diagnostics.A_rest_element_cannot_have_a_property_name);
                 }
                 if (node.initializer) {
-                    // Error on equals token which immediately precedes the initializer
                     return grammarErrorAtPos(node, node.initializer.pos - 1, 1, ts.Diagnostics.A_rest_element_cannot_have_an_initializer);
                 }
             }
         }
         function isStringOrNumberLiteralExpression(expr) {
-            return expr.kind === 9 /* StringLiteral */ || expr.kind === 8 /* NumericLiteral */ ||
-                expr.kind === 198 /* PrefixUnaryExpression */ && expr.operator === 38 /* MinusToken */ &&
-                    expr.operand.kind === 8 /* NumericLiteral */;
+            return expr.kind === 9 || expr.kind === 8 ||
+                expr.kind === 198 && expr.operator === 38 &&
+                    expr.operand.kind === 8;
         }
         function checkGrammarVariableDeclaration(node) {
-            if (node.parent.parent.kind !== 221 /* ForInStatement */ && node.parent.parent.kind !== 222 /* ForOfStatement */) {
-                if (node.flags & 4194304 /* Ambient */) {
+            if (node.parent.parent.kind !== 221 && node.parent.parent.kind !== 222) {
+                if (node.flags & 4194304) {
                     if (node.initializer) {
                         if (ts.isConst(node) && !node.type) {
                             if (!isStringOrNumberLiteralExpression(node.initializer)) {
@@ -54744,13 +45528,11 @@ var ts;
                             }
                         }
                         else {
-                            // Error on equals token which immediate precedes the initializer
                             var equalsTokenLength = "=".length;
                             return grammarErrorAtPos(node, node.initializer.pos - equalsTokenLength, equalsTokenLength, ts.Diagnostics.Initializers_are_not_allowed_in_ambient_contexts);
                         }
                     }
                     if (node.initializer && !(ts.isConst(node) && isStringOrNumberLiteralExpression(node.initializer))) {
-                        // Error on equals token which immediate precedes the initializer
                         var equalsTokenLength = "=".length;
                         return grammarErrorAtPos(node, node.initializer.pos - equalsTokenLength, equalsTokenLength, ts.Diagnostics.Initializers_are_not_allowed_in_ambient_contexts);
                     }
@@ -54764,24 +45546,18 @@ var ts;
                     }
                 }
             }
-            if (node.exclamationToken && (node.parent.parent.kind !== 214 /* VariableStatement */ || !node.type || node.initializer || node.flags & 4194304 /* Ambient */)) {
+            if (node.exclamationToken && (node.parent.parent.kind !== 214 || !node.type || node.initializer || node.flags & 4194304)) {
                 return grammarErrorOnNode(node.exclamationToken, ts.Diagnostics.A_definite_assignment_assertion_is_not_permitted_in_this_context);
             }
             if (compilerOptions.module !== ts.ModuleKind.ES2015 && compilerOptions.module !== ts.ModuleKind.ESNext && compilerOptions.module !== ts.ModuleKind.System && !compilerOptions.noEmit &&
-                !(node.parent.parent.flags & 4194304 /* Ambient */) && ts.hasModifier(node.parent.parent, 1 /* Export */)) {
+                !(node.parent.parent.flags & 4194304) && ts.hasModifier(node.parent.parent, 1)) {
                 checkESModuleMarker(node.name);
             }
             var checkLetConstNames = (ts.isLet(node) || ts.isConst(node));
-            // 1. LexicalDeclaration : LetOrConst BindingList ;
-            // It is a Syntax Error if the BoundNames of BindingList contains "let".
-            // 2. ForDeclaration: ForDeclaration : LetOrConst ForBinding
-            // It is a Syntax Error if the BoundNames of ForDeclaration contains "let".
-            // It is a SyntaxError if a VariableDeclaration or VariableDeclarationNoIn occurs within strict code
-            // and its Identifier is eval or arguments
             return checkLetConstNames && checkGrammarNameInLetOrConstDeclarations(node.name);
         }
         function checkESModuleMarker(name) {
-            if (name.kind === 71 /* Identifier */) {
+            if (name.kind === 71) {
                 if (ts.idText(name) === "__esModule") {
                     return grammarErrorOnNode(name, ts.Diagnostics.Identifier_expected_esModule_is_reserved_as_an_exported_marker_when_transforming_ECMAScript_modules);
                 }
@@ -54798,8 +45574,8 @@ var ts;
             return false;
         }
         function checkGrammarNameInLetOrConstDeclarations(name) {
-            if (name.kind === 71 /* Identifier */) {
-                if (name.originalKeywordKind === 110 /* LetKeyword */) {
+            if (name.kind === 71) {
+                if (name.originalKeywordKind === 110) {
                     return grammarErrorOnNode(name, ts.Diagnostics.let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations);
                 }
             }
@@ -54826,15 +45602,15 @@ var ts;
         }
         function allowLetAndConstDeclarations(parent) {
             switch (parent.kind) {
-                case 217 /* IfStatement */:
-                case 218 /* DoStatement */:
-                case 219 /* WhileStatement */:
-                case 226 /* WithStatement */:
-                case 220 /* ForStatement */:
-                case 221 /* ForInStatement */:
-                case 222 /* ForOfStatement */:
+                case 217:
+                case 218:
+                case 219:
+                case 226:
+                case 220:
+                case 221:
+                case 222:
                     return false;
-                case 228 /* LabeledStatement */:
+                case 228:
                     return allowLetAndConstDeclarations(parent.parent);
             }
             return true;
@@ -54852,12 +45628,12 @@ var ts;
         function checkGrammarMetaProperty(node) {
             var escapedText = node.name.escapedText;
             switch (node.keywordToken) {
-                case 94 /* NewKeyword */:
+                case 94:
                     if (escapedText !== "target") {
                         return grammarErrorOnNode(node.name, ts.Diagnostics._0_is_not_a_valid_meta_property_for_keyword_1_Did_you_mean_2, node.name.escapedText, ts.tokenToString(node.keywordToken), "target");
                     }
                     break;
-                case 91 /* ImportKeyword */:
+                case 91:
                     if (escapedText !== "meta") {
                         return grammarErrorOnNode(node.name, ts.Diagnostics._0_is_not_a_valid_meta_property_for_keyword_1_Did_you_mean_2, node.name.escapedText, ts.tokenToString(node.keywordToken), "meta");
                     }
@@ -54911,7 +45687,7 @@ var ts;
                     return true;
                 }
             }
-            else if (node.parent.kind === 236 /* InterfaceDeclaration */) {
+            else if (node.parent.kind === 236) {
                 if (checkGrammarForInvalidDynamicName(node.name, ts.Diagnostics.A_computed_property_name_in_an_interface_must_refer_to_an_expression_whose_type_is_a_literal_type_or_a_unique_symbol_type)) {
                     return true;
                 }
@@ -54919,7 +45695,7 @@ var ts;
                     return grammarErrorOnNode(node.initializer, ts.Diagnostics.An_interface_property_cannot_have_an_initializer);
                 }
             }
-            else if (node.parent.kind === 166 /* TypeLiteral */) {
+            else if (node.parent.kind === 166) {
                 if (checkGrammarForInvalidDynamicName(node.name, ts.Diagnostics.A_computed_property_name_in_a_type_literal_must_refer_to_an_expression_whose_type_is_a_literal_type_or_a_unique_symbol_type)) {
                     return true;
                 }
@@ -54927,35 +45703,23 @@ var ts;
                     return grammarErrorOnNode(node.initializer, ts.Diagnostics.A_type_literal_property_cannot_have_an_initializer);
                 }
             }
-            if (node.flags & 4194304 /* Ambient */ && node.initializer) {
+            if (node.flags & 4194304 && node.initializer) {
                 return grammarErrorOnFirstToken(node.initializer, ts.Diagnostics.Initializers_are_not_allowed_in_ambient_contexts);
             }
             if (ts.isPropertyDeclaration(node) && node.exclamationToken && (!ts.isClassLike(node.parent) || !node.type || node.initializer ||
-                node.flags & 4194304 /* Ambient */ || ts.hasModifier(node, 32 /* Static */ | 128 /* Abstract */))) {
+                node.flags & 4194304 || ts.hasModifier(node, 32 | 128))) {
                 return grammarErrorOnNode(node.exclamationToken, ts.Diagnostics.A_definite_assignment_assertion_is_not_permitted_in_this_context);
             }
         }
         function checkGrammarTopLevelElementForRequiredDeclareModifier(node) {
-            // A declare modifier is required for any top level .d.ts declaration except export=, export default, export as namespace
-            // interfaces and imports categories:
-            //
-            //  DeclarationElement:
-            //     ExportAssignment
-            //     export_opt   InterfaceDeclaration
-            //     export_opt   TypeAliasDeclaration
-            //     export_opt   ImportDeclaration
-            //     export_opt   ExternalImportDeclaration
-            //     export_opt   AmbientDeclaration
-            //
-            // TODO: The spec needs to be amended to reflect this grammar.
-            if (node.kind === 236 /* InterfaceDeclaration */ ||
-                node.kind === 237 /* TypeAliasDeclaration */ ||
-                node.kind === 244 /* ImportDeclaration */ ||
-                node.kind === 243 /* ImportEqualsDeclaration */ ||
-                node.kind === 250 /* ExportDeclaration */ ||
-                node.kind === 249 /* ExportAssignment */ ||
-                node.kind === 242 /* NamespaceExportDeclaration */ ||
-                ts.hasModifier(node, 2 /* Ambient */ | 1 /* Export */ | 512 /* Default */)) {
+            if (node.kind === 236 ||
+                node.kind === 237 ||
+                node.kind === 244 ||
+                node.kind === 243 ||
+                node.kind === 250 ||
+                node.kind === 249 ||
+                node.kind === 242 ||
+                ts.hasModifier(node, 2 | 1 | 512)) {
                 return false;
             }
             return grammarErrorOnFirstToken(node, ts.Diagnostics.A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file);
@@ -54963,7 +45727,7 @@ var ts;
         function checkGrammarTopLevelElementsForRequiredDeclareModifier(file) {
             for (var _i = 0, _a = file.statements; _i < _a.length; _i++) {
                 var decl = _a[_i];
-                if (ts.isDeclaration(decl) || decl.kind === 214 /* VariableStatement */) {
+                if (ts.isDeclaration(decl) || decl.kind === 214) {
                     if (checkGrammarTopLevelElementForRequiredDeclareModifier(decl)) {
                         return true;
                     }
@@ -54972,54 +45736,42 @@ var ts;
             return false;
         }
         function checkGrammarSourceFile(node) {
-            return !!(node.flags & 4194304 /* Ambient */) && checkGrammarTopLevelElementsForRequiredDeclareModifier(node);
+            return !!(node.flags & 4194304) && checkGrammarTopLevelElementsForRequiredDeclareModifier(node);
         }
         function checkGrammarStatementInAmbientContext(node) {
-            if (node.flags & 4194304 /* Ambient */) {
-                // An accessors is already reported about the ambient context
+            if (node.flags & 4194304) {
                 if (ts.isAccessor(node.parent)) {
                     return getNodeLinks(node).hasReportedStatementInAmbientContext = true;
                 }
-                // Find containing block which is either Block, ModuleBlock, SourceFile
                 var links = getNodeLinks(node);
                 if (!links.hasReportedStatementInAmbientContext && ts.isFunctionLike(node.parent)) {
                     return getNodeLinks(node).hasReportedStatementInAmbientContext = grammarErrorOnFirstToken(node, ts.Diagnostics.An_implementation_cannot_be_declared_in_ambient_contexts);
                 }
-                // We are either parented by another statement, or some sort of block.
-                // If we're in a block, we only want to really report an error once
-                // to prevent noisiness.  So use a bit on the block to indicate if
-                // this has already been reported, and don't report if it has.
-                //
-                if (node.parent.kind === 213 /* Block */ || node.parent.kind === 240 /* ModuleBlock */ || node.parent.kind === 274 /* SourceFile */) {
+                if (node.parent.kind === 213 || node.parent.kind === 240 || node.parent.kind === 274) {
                     var links_1 = getNodeLinks(node.parent);
-                    // Check if the containing block ever report this error
                     if (!links_1.hasReportedStatementInAmbientContext) {
                         return links_1.hasReportedStatementInAmbientContext = grammarErrorOnFirstToken(node, ts.Diagnostics.Statements_are_not_allowed_in_ambient_contexts);
                     }
                 }
                 else {
-                    // We must be parented by a statement.  If so, there's no need
-                    // to report the error as our parent will have already done it.
-                    // Debug.assert(isStatement(node.parent));
                 }
             }
             return false;
         }
         function checkGrammarNumericLiteral(node) {
-            // Grammar checking
-            if (node.numericLiteralFlags & 32 /* Octal */) {
+            if (node.numericLiteralFlags & 32) {
                 var diagnosticMessage = void 0;
-                if (languageVersion >= 1 /* ES5 */) {
+                if (languageVersion >= 1) {
                     diagnosticMessage = ts.Diagnostics.Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher_Use_the_syntax_0;
                 }
-                else if (ts.isChildOfNodeWithKind(node, 178 /* LiteralType */)) {
+                else if (ts.isChildOfNodeWithKind(node, 178)) {
                     diagnosticMessage = ts.Diagnostics.Octal_literal_types_must_use_ES2015_syntax_Use_the_syntax_0;
                 }
-                else if (ts.isChildOfNodeWithKind(node, 273 /* EnumMember */)) {
+                else if (ts.isChildOfNodeWithKind(node, 273)) {
                     diagnosticMessage = ts.Diagnostics.Octal_literals_are_not_allowed_in_enums_members_initializer_Use_the_syntax_0;
                 }
                 if (diagnosticMessage) {
-                    var withMinus = ts.isPrefixUnaryExpression(node.parent) && node.parent.operator === 38 /* MinusToken */;
+                    var withMinus = ts.isPrefixUnaryExpression(node.parent) && node.parent.operator === 38;
                     var literal = (withMinus ? "-" : "") + "0o" + node.text;
                     return grammarErrorOnNode(withMinus ? node.parent : node, diagnosticMessage, literal);
                 }
@@ -55030,7 +45782,7 @@ var ts;
             var sourceFile = ts.getSourceFileOfNode(node);
             if (!hasParseDiagnostics(sourceFile)) {
                 var span = ts.getSpanOfTokenAtPosition(sourceFile, node.pos);
-                diagnostics.add(ts.createFileDiagnostic(sourceFile, ts.textSpanEnd(span), /*length*/ 0, message, arg0, arg1, arg2));
+                diagnostics.add(ts.createFileDiagnostic(sourceFile, ts.textSpanEnd(span), 0, message, arg0, arg1, arg2));
                 return true;
             }
             return false;
@@ -55039,7 +45791,6 @@ var ts;
             if (!ambientModulesCache) {
                 ambientModulesCache = [];
                 globals.forEach(function (global, sym) {
-                    // No need to `unescapeLeadingUnderscores`, an escaped symbol is never an ambient module.
                     if (ambientModuleSymbolRegex.test(sym)) {
                         ambientModulesCache.push(global);
                     }
@@ -55058,8 +45809,6 @@ var ts;
             if (nodeArguments.length !== 1) {
                 return grammarErrorOnNode(node, ts.Diagnostics.Dynamic_import_must_have_one_specifier_as_an_argument);
             }
-            // see: parseArgumentOrArrayLiteralElement...we use this function which parse arguments of callExpression to parse specifier for dynamic import.
-            // parseArgumentOrArrayLiteralElement allows spread element to be in an argument list which is not allowed as specifier in dynamic import.
             if (ts.isSpreadElement(nodeArguments[0])) {
                 return grammarErrorOnNode(nodeArguments[0], ts.Diagnostics.Specifier_of_dynamic_import_cannot_be_spread_element);
             }
@@ -55067,11 +45816,10 @@ var ts;
         }
     }
     ts.createTypeChecker = createTypeChecker;
-    /** Like 'isDeclarationName', but returns true for LHS of `import { x as y }` or `export { x as y }`. */
     function isDeclarationNameOrImportPropertyName(name) {
         switch (name.parent.kind) {
-            case 248 /* ImportSpecifier */:
-            case 252 /* ExportSpecifier */:
+            case 248:
+            case 252:
                 return ts.isIdentifier(name);
             default:
                 return ts.isDeclarationName(name);
@@ -55079,40 +45827,36 @@ var ts;
     }
     function isSomeImportDeclaration(decl) {
         switch (decl.kind) {
-            case 245 /* ImportClause */: // For default import
-            case 243 /* ImportEqualsDeclaration */:
-            case 246 /* NamespaceImport */:
-            case 248 /* ImportSpecifier */: // For rename import `x as y`
+            case 245:
+            case 243:
+            case 246:
+            case 248:
                 return true;
-            case 71 /* Identifier */:
-                // For regular import, `decl` is an Identifier under the ImportSpecifier.
-                return decl.parent.kind === 248 /* ImportSpecifier */;
+            case 71:
+                return decl.parent.kind === 248;
             default:
                 return false;
         }
     }
     var JsxNames;
     (function (JsxNames) {
-        // tslint:disable variable-name
         JsxNames.JSX = "JSX";
         JsxNames.IntrinsicElements = "IntrinsicElements";
         JsxNames.ElementClass = "ElementClass";
-        JsxNames.ElementAttributesPropertyNameContainer = "ElementAttributesProperty"; // TODO: Deprecate and remove support
+        JsxNames.ElementAttributesPropertyNameContainer = "ElementAttributesProperty";
         JsxNames.ElementChildrenAttributeNameContainer = "ElementChildrenAttribute";
         JsxNames.Element = "Element";
         JsxNames.IntrinsicAttributes = "IntrinsicAttributes";
         JsxNames.IntrinsicClassAttributes = "IntrinsicClassAttributes";
-        // tslint:enable variable-name
     })(JsxNames || (JsxNames = {}));
 })(ts || (ts = {}));
 var ts;
 (function (ts) {
     function createSynthesizedNode(kind) {
         var node = ts.createNode(kind, -1, -1);
-        node.flags |= 8 /* Synthesized */;
+        node.flags |= 8;
         return node;
     }
-    /* @internal */
     function updateNode(updated, original) {
         if (updated !== original) {
             setOriginalNode(updated, original);
@@ -55122,9 +45866,6 @@ var ts;
         return updated;
     }
     ts.updateNode = updateNode;
-    /**
-     * Make `elements` into a `NodeArray<T>`. If `elements` is `undefined`, returns an empty `NodeArray<T>`.
-     */
     function createNodeArray(elements, hasTrailingComma) {
         if (!elements || elements === ts.emptyArray) {
             elements = [];
@@ -55139,14 +45880,7 @@ var ts;
         return array;
     }
     ts.createNodeArray = createNodeArray;
-    /**
-     * Creates a shallow, memberwise clone of a node with no source map location.
-     */
-    /* @internal */
     function getSynthesizedClone(node) {
-        // We don't use "clone" from core.ts here, as we need to preserve the prototype chain of
-        // the original node. We also need to exclude specific properties and only include own-
-        // properties (to skip members already defined on the shared prototype).
         if (node === undefined) {
             return node;
         }
@@ -55179,20 +45913,20 @@ var ts;
     }
     ts.createLiteral = createLiteral;
     function createNumericLiteral(value) {
-        var node = createSynthesizedNode(8 /* NumericLiteral */);
+        var node = createSynthesizedNode(8);
         node.text = value;
         node.numericLiteralFlags = 0;
         return node;
     }
     ts.createNumericLiteral = createNumericLiteral;
     function createStringLiteral(text) {
-        var node = createSynthesizedNode(9 /* StringLiteral */);
+        var node = createSynthesizedNode(9);
         node.text = text;
         return node;
     }
     ts.createStringLiteral = createStringLiteral;
     function createRegularExpressionLiteral(text) {
-        var node = createSynthesizedNode(12 /* RegularExpressionLiteral */);
+        var node = createSynthesizedNode(12);
         node.text = text;
         return node;
     }
@@ -55203,10 +45937,10 @@ var ts;
         return node;
     }
     function createIdentifier(text, typeArguments) {
-        var node = createSynthesizedNode(71 /* Identifier */);
+        var node = createSynthesizedNode(71);
         node.escapedText = ts.escapeLeadingUnderscores(text);
-        node.originalKeywordKind = text ? ts.stringToToken(text) : 0 /* Unknown */;
-        node.autoGenerateFlags = 0 /* None */;
+        node.originalKeywordKind = text ? ts.stringToToken(text) : 0;
+        node.autoGenerateFlags = 0;
         node.autoGenerateId = 0;
         if (typeArguments) {
             node.typeArguments = createNodeArray(typeArguments);
@@ -55223,31 +45957,29 @@ var ts;
     var nextAutoGenerateId = 0;
     function createTempVariable(recordTempVariable, reservedInNestedScopes) {
         var name = createIdentifier("");
-        name.autoGenerateFlags = 1 /* Auto */;
+        name.autoGenerateFlags = 1;
         name.autoGenerateId = nextAutoGenerateId;
         nextAutoGenerateId++;
         if (recordTempVariable) {
             recordTempVariable(name);
         }
         if (reservedInNestedScopes) {
-            name.autoGenerateFlags |= 8 /* ReservedInNestedScopes */;
+            name.autoGenerateFlags |= 8;
         }
         return name;
     }
     ts.createTempVariable = createTempVariable;
-    /** Create a unique temporary variable for use in a loop. */
     function createLoopVariable() {
         var name = createIdentifier("");
-        name.autoGenerateFlags = 2 /* Loop */;
+        name.autoGenerateFlags = 2;
         name.autoGenerateId = nextAutoGenerateId;
         nextAutoGenerateId++;
         return name;
     }
     ts.createLoopVariable = createLoopVariable;
-    /** Create a unique name based on the supplied text. */
     function createUniqueName(text) {
         var name = createIdentifier(text);
-        name.autoGenerateFlags = 3 /* Unique */;
+        name.autoGenerateFlags = 3;
         name.autoGenerateId = nextAutoGenerateId;
         nextAutoGenerateId++;
         return name;
@@ -55255,100 +45987,95 @@ var ts;
     ts.createUniqueName = createUniqueName;
     function createOptimisticUniqueName(text) {
         var name = createIdentifier(text);
-        name.autoGenerateFlags = 3 /* Unique */ | 16 /* Optimistic */;
+        name.autoGenerateFlags = 3 | 16;
         name.autoGenerateId = nextAutoGenerateId;
         nextAutoGenerateId++;
         return name;
     }
     ts.createOptimisticUniqueName = createOptimisticUniqueName;
-    /** Create a unique name based on the supplied text. This does not consider names injected by the transformer. */
     function createFileLevelUniqueName(text) {
         var name = createOptimisticUniqueName(text);
-        name.autoGenerateFlags |= 32 /* FileLevel */;
+        name.autoGenerateFlags |= 32;
         return name;
     }
     ts.createFileLevelUniqueName = createFileLevelUniqueName;
     function getGeneratedNameForNode(node, flags) {
         var name = createIdentifier(ts.isIdentifier(node) ? ts.idText(node) : "");
-        name.autoGenerateFlags = 4 /* Node */ | flags;
+        name.autoGenerateFlags = 4 | flags;
         name.autoGenerateId = nextAutoGenerateId;
         name.original = node;
         nextAutoGenerateId++;
         return name;
     }
     ts.getGeneratedNameForNode = getGeneratedNameForNode;
-    // Punctuation
     function createToken(token) {
         return createSynthesizedNode(token);
     }
     ts.createToken = createToken;
-    // Reserved words
     function createSuper() {
-        return createSynthesizedNode(97 /* SuperKeyword */);
+        return createSynthesizedNode(97);
     }
     ts.createSuper = createSuper;
     function createThis() {
-        return createSynthesizedNode(99 /* ThisKeyword */);
+        return createSynthesizedNode(99);
     }
     ts.createThis = createThis;
     function createNull() {
-        return createSynthesizedNode(95 /* NullKeyword */);
+        return createSynthesizedNode(95);
     }
     ts.createNull = createNull;
     function createTrue() {
-        return createSynthesizedNode(101 /* TrueKeyword */);
+        return createSynthesizedNode(101);
     }
     ts.createTrue = createTrue;
     function createFalse() {
-        return createSynthesizedNode(86 /* FalseKeyword */);
+        return createSynthesizedNode(86);
     }
     ts.createFalse = createFalse;
-    // Modifiers
     function createModifier(kind) {
         return createToken(kind);
     }
     ts.createModifier = createModifier;
     function createModifiersFromModifierFlags(flags) {
         var result = [];
-        if (flags & 1 /* Export */) {
-            result.push(createModifier(84 /* ExportKeyword */));
+        if (flags & 1) {
+            result.push(createModifier(84));
         }
-        if (flags & 2 /* Ambient */) {
-            result.push(createModifier(124 /* DeclareKeyword */));
+        if (flags & 2) {
+            result.push(createModifier(124));
         }
-        if (flags & 512 /* Default */) {
-            result.push(createModifier(79 /* DefaultKeyword */));
+        if (flags & 512) {
+            result.push(createModifier(79));
         }
-        if (flags & 2048 /* Const */) {
-            result.push(createModifier(76 /* ConstKeyword */));
+        if (flags & 2048) {
+            result.push(createModifier(76));
         }
-        if (flags & 4 /* Public */) {
-            result.push(createModifier(114 /* PublicKeyword */));
+        if (flags & 4) {
+            result.push(createModifier(114));
         }
-        if (flags & 8 /* Private */) {
-            result.push(createModifier(112 /* PrivateKeyword */));
+        if (flags & 8) {
+            result.push(createModifier(112));
         }
-        if (flags & 16 /* Protected */) {
-            result.push(createModifier(113 /* ProtectedKeyword */));
+        if (flags & 16) {
+            result.push(createModifier(113));
         }
-        if (flags & 128 /* Abstract */) {
-            result.push(createModifier(117 /* AbstractKeyword */));
+        if (flags & 128) {
+            result.push(createModifier(117));
         }
-        if (flags & 32 /* Static */) {
-            result.push(createModifier(115 /* StaticKeyword */));
+        if (flags & 32) {
+            result.push(createModifier(115));
         }
-        if (flags & 64 /* Readonly */) {
-            result.push(createModifier(132 /* ReadonlyKeyword */));
+        if (flags & 64) {
+            result.push(createModifier(132));
         }
-        if (flags & 256 /* Async */) {
-            result.push(createModifier(120 /* AsyncKeyword */));
+        if (flags & 256) {
+            result.push(createModifier(120));
         }
         return result;
     }
     ts.createModifiersFromModifierFlags = createModifiersFromModifierFlags;
-    // Names
     function createQualifiedName(left, right) {
-        var node = createSynthesizedNode(146 /* QualifiedName */);
+        var node = createSynthesizedNode(146);
         node.left = left;
         node.right = asName(right);
         return node;
@@ -55362,13 +46089,13 @@ var ts;
     }
     ts.updateQualifiedName = updateQualifiedName;
     function parenthesizeForComputedName(expression) {
-        return (ts.isBinaryExpression(expression) && expression.operatorToken.kind === 26 /* CommaToken */) ||
-            expression.kind === 302 /* CommaListExpression */ ?
+        return (ts.isBinaryExpression(expression) && expression.operatorToken.kind === 26) ||
+            expression.kind === 302 ?
             createParen(expression) :
             expression;
     }
     function createComputedPropertyName(expression) {
-        var node = createSynthesizedNode(147 /* ComputedPropertyName */);
+        var node = createSynthesizedNode(147);
         node.expression = parenthesizeForComputedName(expression);
         return node;
     }
@@ -55379,9 +46106,8 @@ var ts;
             : node;
     }
     ts.updateComputedPropertyName = updateComputedPropertyName;
-    // Signature elements
     function createTypeParameterDeclaration(name, constraint, defaultType) {
-        var node = createSynthesizedNode(148 /* TypeParameter */);
+        var node = createSynthesizedNode(148);
         node.name = asName(name);
         node.constraint = constraint;
         node.default = defaultType;
@@ -55397,7 +46123,7 @@ var ts;
     }
     ts.updateTypeParameterDeclaration = updateTypeParameterDeclaration;
     function createParameter(decorators, modifiers, dotDotDotToken, name, questionToken, type, initializer) {
-        var node = createSynthesizedNode(149 /* Parameter */);
+        var node = createSynthesizedNode(149);
         node.decorators = asNodeArray(decorators);
         node.modifiers = asNodeArray(modifiers);
         node.dotDotDotToken = dotDotDotToken;
@@ -55421,7 +46147,7 @@ var ts;
     }
     ts.updateParameter = updateParameter;
     function createDecorator(expression) {
-        var node = createSynthesizedNode(150 /* Decorator */);
+        var node = createSynthesizedNode(150);
         node.expression = ts.parenthesizeForAccess(expression);
         return node;
     }
@@ -55432,9 +46158,8 @@ var ts;
             : node;
     }
     ts.updateDecorator = updateDecorator;
-    // Type Elements
     function createPropertySignature(modifiers, name, questionToken, type, initializer) {
-        var node = createSynthesizedNode(151 /* PropertySignature */);
+        var node = createSynthesizedNode(151);
         node.modifiers = asNodeArray(modifiers);
         node.name = asName(name);
         node.questionToken = questionToken;
@@ -55454,12 +46179,12 @@ var ts;
     }
     ts.updatePropertySignature = updatePropertySignature;
     function createProperty(decorators, modifiers, name, questionOrExclamationToken, type, initializer) {
-        var node = createSynthesizedNode(152 /* PropertyDeclaration */);
+        var node = createSynthesizedNode(152);
         node.decorators = asNodeArray(decorators);
         node.modifiers = asNodeArray(modifiers);
         node.name = asName(name);
-        node.questionToken = questionOrExclamationToken !== undefined && questionOrExclamationToken.kind === 55 /* QuestionToken */ ? questionOrExclamationToken : undefined;
-        node.exclamationToken = questionOrExclamationToken !== undefined && questionOrExclamationToken.kind === 51 /* ExclamationToken */ ? questionOrExclamationToken : undefined;
+        node.questionToken = questionOrExclamationToken !== undefined && questionOrExclamationToken.kind === 55 ? questionOrExclamationToken : undefined;
+        node.exclamationToken = questionOrExclamationToken !== undefined && questionOrExclamationToken.kind === 51 ? questionOrExclamationToken : undefined;
         node.type = type;
         node.initializer = initializer;
         return node;
@@ -55469,8 +46194,8 @@ var ts;
         return node.decorators !== decorators
             || node.modifiers !== modifiers
             || node.name !== name
-            || node.questionToken !== (questionOrExclamationToken !== undefined && questionOrExclamationToken.kind === 55 /* QuestionToken */ ? questionOrExclamationToken : undefined)
-            || node.exclamationToken !== (questionOrExclamationToken !== undefined && questionOrExclamationToken.kind === 51 /* ExclamationToken */ ? questionOrExclamationToken : undefined)
+            || node.questionToken !== (questionOrExclamationToken !== undefined && questionOrExclamationToken.kind === 55 ? questionOrExclamationToken : undefined)
+            || node.exclamationToken !== (questionOrExclamationToken !== undefined && questionOrExclamationToken.kind === 51 ? questionOrExclamationToken : undefined)
             || node.type !== type
             || node.initializer !== initializer
             ? updateNode(createProperty(decorators, modifiers, name, questionOrExclamationToken, type, initializer), node)
@@ -55478,7 +46203,7 @@ var ts;
     }
     ts.updateProperty = updateProperty;
     function createMethodSignature(typeParameters, parameters, type, name, questionToken) {
-        var node = createSignatureDeclaration(153 /* MethodSignature */, typeParameters, parameters, type);
+        var node = createSignatureDeclaration(153, typeParameters, parameters, type);
         node.name = asName(name);
         node.questionToken = questionToken;
         return node;
@@ -55495,7 +46220,7 @@ var ts;
     }
     ts.updateMethodSignature = updateMethodSignature;
     function createMethod(decorators, modifiers, asteriskToken, name, questionToken, typeParameters, parameters, type, body) {
-        var node = createSynthesizedNode(154 /* MethodDeclaration */);
+        var node = createSynthesizedNode(154);
         node.decorators = asNodeArray(decorators);
         node.modifiers = asNodeArray(modifiers);
         node.asteriskToken = asteriskToken;
@@ -55523,7 +46248,7 @@ var ts;
     }
     ts.updateMethod = updateMethod;
     function createConstructor(decorators, modifiers, parameters, body) {
-        var node = createSynthesizedNode(155 /* Constructor */);
+        var node = createSynthesizedNode(155);
         node.decorators = asNodeArray(decorators);
         node.modifiers = asNodeArray(modifiers);
         node.typeParameters = undefined;
@@ -55543,7 +46268,7 @@ var ts;
     }
     ts.updateConstructor = updateConstructor;
     function createGetAccessor(decorators, modifiers, name, parameters, type, body) {
-        var node = createSynthesizedNode(156 /* GetAccessor */);
+        var node = createSynthesizedNode(156);
         node.decorators = asNodeArray(decorators);
         node.modifiers = asNodeArray(modifiers);
         node.name = asName(name);
@@ -55566,7 +46291,7 @@ var ts;
     }
     ts.updateGetAccessor = updateGetAccessor;
     function createSetAccessor(decorators, modifiers, name, parameters, body) {
-        var node = createSynthesizedNode(157 /* SetAccessor */);
+        var node = createSynthesizedNode(157);
         node.decorators = asNodeArray(decorators);
         node.modifiers = asNodeArray(modifiers);
         node.name = asName(name);
@@ -55587,7 +46312,7 @@ var ts;
     }
     ts.updateSetAccessor = updateSetAccessor;
     function createCallSignature(typeParameters, parameters, type) {
-        return createSignatureDeclaration(158 /* CallSignature */, typeParameters, parameters, type);
+        return createSignatureDeclaration(158, typeParameters, parameters, type);
     }
     ts.createCallSignature = createCallSignature;
     function updateCallSignature(node, typeParameters, parameters, type) {
@@ -55595,7 +46320,7 @@ var ts;
     }
     ts.updateCallSignature = updateCallSignature;
     function createConstructSignature(typeParameters, parameters, type) {
-        return createSignatureDeclaration(159 /* ConstructSignature */, typeParameters, parameters, type);
+        return createSignatureDeclaration(159, typeParameters, parameters, type);
     }
     ts.createConstructSignature = createConstructSignature;
     function updateConstructSignature(node, typeParameters, parameters, type) {
@@ -55603,7 +46328,7 @@ var ts;
     }
     ts.updateConstructSignature = updateConstructSignature;
     function createIndexSignature(decorators, modifiers, parameters, type) {
-        var node = createSynthesizedNode(160 /* IndexSignature */);
+        var node = createSynthesizedNode(160);
         node.decorators = asNodeArray(decorators);
         node.modifiers = asNodeArray(modifiers);
         node.parameters = createNodeArray(parameters);
@@ -55620,7 +46345,6 @@ var ts;
             : node;
     }
     ts.updateIndexSignature = updateIndexSignature;
-    /* @internal */
     function createSignatureDeclaration(kind, typeParameters, parameters, type, typeArguments) {
         var node = createSynthesizedNode(kind);
         node.typeParameters = asNodeArray(typeParameters);
@@ -55637,13 +46361,12 @@ var ts;
             ? updateNode(createSignatureDeclaration(node.kind, typeParameters, parameters, type), node)
             : node;
     }
-    // Types
     function createKeywordTypeNode(kind) {
         return createSynthesizedNode(kind);
     }
     ts.createKeywordTypeNode = createKeywordTypeNode;
     function createTypePredicateNode(parameterName, type) {
-        var node = createSynthesizedNode(161 /* TypePredicate */);
+        var node = createSynthesizedNode(161);
         node.parameterName = asName(parameterName);
         node.type = type;
         return node;
@@ -55657,7 +46380,7 @@ var ts;
     }
     ts.updateTypePredicateNode = updateTypePredicateNode;
     function createTypeReferenceNode(typeName, typeArguments) {
-        var node = createSynthesizedNode(162 /* TypeReference */);
+        var node = createSynthesizedNode(162);
         node.typeName = asName(typeName);
         node.typeArguments = typeArguments && ts.parenthesizeTypeParameters(typeArguments);
         return node;
@@ -55671,7 +46394,7 @@ var ts;
     }
     ts.updateTypeReferenceNode = updateTypeReferenceNode;
     function createFunctionTypeNode(typeParameters, parameters, type) {
-        return createSignatureDeclaration(163 /* FunctionType */, typeParameters, parameters, type);
+        return createSignatureDeclaration(163, typeParameters, parameters, type);
     }
     ts.createFunctionTypeNode = createFunctionTypeNode;
     function updateFunctionTypeNode(node, typeParameters, parameters, type) {
@@ -55679,7 +46402,7 @@ var ts;
     }
     ts.updateFunctionTypeNode = updateFunctionTypeNode;
     function createConstructorTypeNode(typeParameters, parameters, type) {
-        return createSignatureDeclaration(164 /* ConstructorType */, typeParameters, parameters, type);
+        return createSignatureDeclaration(164, typeParameters, parameters, type);
     }
     ts.createConstructorTypeNode = createConstructorTypeNode;
     function updateConstructorTypeNode(node, typeParameters, parameters, type) {
@@ -55687,7 +46410,7 @@ var ts;
     }
     ts.updateConstructorTypeNode = updateConstructorTypeNode;
     function createTypeQueryNode(exprName) {
-        var node = createSynthesizedNode(165 /* TypeQuery */);
+        var node = createSynthesizedNode(165);
         node.exprName = exprName;
         return node;
     }
@@ -55699,7 +46422,7 @@ var ts;
     }
     ts.updateTypeQueryNode = updateTypeQueryNode;
     function createTypeLiteralNode(members) {
-        var node = createSynthesizedNode(166 /* TypeLiteral */);
+        var node = createSynthesizedNode(166);
         node.members = createNodeArray(members);
         return node;
     }
@@ -55711,7 +46434,7 @@ var ts;
     }
     ts.updateTypeLiteralNode = updateTypeLiteralNode;
     function createArrayTypeNode(elementType) {
-        var node = createSynthesizedNode(167 /* ArrayType */);
+        var node = createSynthesizedNode(167);
         node.elementType = ts.parenthesizeArrayTypeMember(elementType);
         return node;
     }
@@ -55723,7 +46446,7 @@ var ts;
     }
     ts.updateArrayTypeNode = updateArrayTypeNode;
     function createTupleTypeNode(elementTypes) {
-        var node = createSynthesizedNode(168 /* TupleType */);
+        var node = createSynthesizedNode(168);
         node.elementTypes = createNodeArray(elementTypes);
         return node;
     }
@@ -55735,7 +46458,7 @@ var ts;
     }
     ts.updateTypleTypeNode = updateTypleTypeNode;
     function createUnionTypeNode(types) {
-        return createUnionOrIntersectionTypeNode(169 /* UnionType */, types);
+        return createUnionOrIntersectionTypeNode(169, types);
     }
     ts.createUnionTypeNode = createUnionTypeNode;
     function updateUnionTypeNode(node, types) {
@@ -55743,7 +46466,7 @@ var ts;
     }
     ts.updateUnionTypeNode = updateUnionTypeNode;
     function createIntersectionTypeNode(types) {
-        return createUnionOrIntersectionTypeNode(170 /* IntersectionType */, types);
+        return createUnionOrIntersectionTypeNode(170, types);
     }
     ts.createIntersectionTypeNode = createIntersectionTypeNode;
     function updateIntersectionTypeNode(node, types) {
@@ -55762,7 +46485,7 @@ var ts;
             : node;
     }
     function createConditionalTypeNode(checkType, extendsType, trueType, falseType) {
-        var node = createSynthesizedNode(171 /* ConditionalType */);
+        var node = createSynthesizedNode(171);
         node.checkType = ts.parenthesizeConditionalTypeMember(checkType);
         node.extendsType = ts.parenthesizeConditionalTypeMember(extendsType);
         node.trueType = trueType;
@@ -55780,7 +46503,7 @@ var ts;
     }
     ts.updateConditionalTypeNode = updateConditionalTypeNode;
     function createInferTypeNode(typeParameter) {
-        var node = createSynthesizedNode(172 /* InferType */);
+        var node = createSynthesizedNode(172);
         node.typeParameter = typeParameter;
         return node;
     }
@@ -55792,7 +46515,7 @@ var ts;
     }
     ts.updateInferTypeNode = updateInferTypeNode;
     function createImportTypeNode(argument, qualifier, typeArguments, isTypeOf) {
-        var node = createSynthesizedNode(179 /* ImportType */);
+        var node = createSynthesizedNode(179);
         node.argument = argument;
         node.qualifier = qualifier;
         node.typeArguments = asNodeArray(typeArguments);
@@ -55810,7 +46533,7 @@ var ts;
     }
     ts.updateImportTypeNode = updateImportTypeNode;
     function createParenthesizedType(type) {
-        var node = createSynthesizedNode(173 /* ParenthesizedType */);
+        var node = createSynthesizedNode(173);
         node.type = type;
         return node;
     }
@@ -55822,12 +46545,12 @@ var ts;
     }
     ts.updateParenthesizedType = updateParenthesizedType;
     function createThisTypeNode() {
-        return createSynthesizedNode(174 /* ThisType */);
+        return createSynthesizedNode(174);
     }
     ts.createThisTypeNode = createThisTypeNode;
     function createTypeOperatorNode(operatorOrType, type) {
-        var node = createSynthesizedNode(175 /* TypeOperator */);
-        node.operator = typeof operatorOrType === "number" ? operatorOrType : 128 /* KeyOfKeyword */;
+        var node = createSynthesizedNode(175);
+        node.operator = typeof operatorOrType === "number" ? operatorOrType : 128;
         node.type = ts.parenthesizeElementTypeMember(typeof operatorOrType === "number" ? type : operatorOrType);
         return node;
     }
@@ -55837,7 +46560,7 @@ var ts;
     }
     ts.updateTypeOperatorNode = updateTypeOperatorNode;
     function createIndexedAccessTypeNode(objectType, indexType) {
-        var node = createSynthesizedNode(176 /* IndexedAccessType */);
+        var node = createSynthesizedNode(176);
         node.objectType = ts.parenthesizeElementTypeMember(objectType);
         node.indexType = indexType;
         return node;
@@ -55851,7 +46574,7 @@ var ts;
     }
     ts.updateIndexedAccessTypeNode = updateIndexedAccessTypeNode;
     function createMappedTypeNode(readonlyToken, typeParameter, questionToken, type) {
-        var node = createSynthesizedNode(177 /* MappedType */);
+        var node = createSynthesizedNode(177);
         node.readonlyToken = readonlyToken;
         node.typeParameter = typeParameter;
         node.questionToken = questionToken;
@@ -55869,7 +46592,7 @@ var ts;
     }
     ts.updateMappedTypeNode = updateMappedTypeNode;
     function createLiteralTypeNode(literal) {
-        var node = createSynthesizedNode(178 /* LiteralType */);
+        var node = createSynthesizedNode(178);
         node.literal = literal;
         return node;
     }
@@ -55880,9 +46603,8 @@ var ts;
             : node;
     }
     ts.updateLiteralTypeNode = updateLiteralTypeNode;
-    // Binding Patterns
     function createObjectBindingPattern(elements) {
-        var node = createSynthesizedNode(180 /* ObjectBindingPattern */);
+        var node = createSynthesizedNode(180);
         node.elements = createNodeArray(elements);
         return node;
     }
@@ -55894,7 +46616,7 @@ var ts;
     }
     ts.updateObjectBindingPattern = updateObjectBindingPattern;
     function createArrayBindingPattern(elements) {
-        var node = createSynthesizedNode(181 /* ArrayBindingPattern */);
+        var node = createSynthesizedNode(181);
         node.elements = createNodeArray(elements);
         return node;
     }
@@ -55906,7 +46628,7 @@ var ts;
     }
     ts.updateArrayBindingPattern = updateArrayBindingPattern;
     function createBindingElement(dotDotDotToken, propertyName, name, initializer) {
-        var node = createSynthesizedNode(182 /* BindingElement */);
+        var node = createSynthesizedNode(182);
         node.dotDotDotToken = dotDotDotToken;
         node.propertyName = asName(propertyName);
         node.name = asName(name);
@@ -55923,9 +46645,8 @@ var ts;
             : node;
     }
     ts.updateBindingElement = updateBindingElement;
-    // Expression
     function createArrayLiteral(elements, multiLine) {
-        var node = createSynthesizedNode(183 /* ArrayLiteralExpression */);
+        var node = createSynthesizedNode(183);
         node.elements = ts.parenthesizeListElements(createNodeArray(elements));
         if (multiLine)
             node.multiLine = true;
@@ -55939,7 +46660,7 @@ var ts;
     }
     ts.updateArrayLiteral = updateArrayLiteral;
     function createObjectLiteral(properties, multiLine) {
-        var node = createSynthesizedNode(184 /* ObjectLiteralExpression */);
+        var node = createSynthesizedNode(184);
         node.properties = createNodeArray(properties);
         if (multiLine)
             node.multiLine = true;
@@ -55953,16 +46674,14 @@ var ts;
     }
     ts.updateObjectLiteral = updateObjectLiteral;
     function createPropertyAccess(expression, name) {
-        var node = createSynthesizedNode(185 /* PropertyAccessExpression */);
+        var node = createSynthesizedNode(185);
         node.expression = ts.parenthesizeForAccess(expression);
-        node.name = asName(name); // TODO: GH#18217
-        setEmitFlags(node, 131072 /* NoIndentation */);
+        node.name = asName(name);
+        setEmitFlags(node, 131072);
         return node;
     }
     ts.createPropertyAccess = createPropertyAccess;
     function updatePropertyAccess(node, expression, name) {
-        // Because we are updating existed propertyAccess we want to inherit its emitFlags
-        // instead of using the default from createPropertyAccess
         return node.expression !== expression
             || node.name !== name
             ? updateNode(setEmitFlags(createPropertyAccess(expression, name), ts.getEmitFlags(node)), node)
@@ -55970,7 +46689,7 @@ var ts;
     }
     ts.updatePropertyAccess = updatePropertyAccess;
     function createElementAccess(expression, index) {
-        var node = createSynthesizedNode(186 /* ElementAccessExpression */);
+        var node = createSynthesizedNode(186);
         node.expression = ts.parenthesizeForAccess(expression);
         node.argumentExpression = asExpression(index);
         return node;
@@ -55984,7 +46703,7 @@ var ts;
     }
     ts.updateElementAccess = updateElementAccess;
     function createCall(expression, typeArguments, argumentsArray) {
-        var node = createSynthesizedNode(187 /* CallExpression */);
+        var node = createSynthesizedNode(187);
         node.expression = ts.parenthesizeForAccess(expression);
         node.typeArguments = asNodeArray(typeArguments);
         node.arguments = ts.parenthesizeListElements(createNodeArray(argumentsArray));
@@ -56000,7 +46719,7 @@ var ts;
     }
     ts.updateCall = updateCall;
     function createNew(expression, typeArguments, argumentsArray) {
-        var node = createSynthesizedNode(188 /* NewExpression */);
+        var node = createSynthesizedNode(188);
         node.expression = ts.parenthesizeForNew(expression);
         node.typeArguments = asNodeArray(typeArguments);
         node.arguments = argumentsArray ? ts.parenthesizeListElements(createNodeArray(argumentsArray)) : undefined;
@@ -56016,7 +46735,7 @@ var ts;
     }
     ts.updateNew = updateNew;
     function createTaggedTemplate(tag, typeArgumentsOrTemplate, template) {
-        var node = createSynthesizedNode(189 /* TaggedTemplateExpression */);
+        var node = createSynthesizedNode(189);
         node.tag = ts.parenthesizeForAccess(tag);
         if (template) {
             node.typeArguments = asNodeArray(typeArgumentsOrTemplate);
@@ -56039,7 +46758,7 @@ var ts;
     }
     ts.updateTaggedTemplate = updateTaggedTemplate;
     function createTypeAssertion(type, expression) {
-        var node = createSynthesizedNode(190 /* TypeAssertionExpression */);
+        var node = createSynthesizedNode(190);
         node.type = type;
         node.expression = ts.parenthesizePrefixOperand(expression);
         return node;
@@ -56053,7 +46772,7 @@ var ts;
     }
     ts.updateTypeAssertion = updateTypeAssertion;
     function createParen(expression) {
-        var node = createSynthesizedNode(191 /* ParenthesizedExpression */);
+        var node = createSynthesizedNode(191);
         node.expression = expression;
         return node;
     }
@@ -56065,7 +46784,7 @@ var ts;
     }
     ts.updateParen = updateParen;
     function createFunctionExpression(modifiers, asteriskToken, name, typeParameters, parameters, type, body) {
-        var node = createSynthesizedNode(192 /* FunctionExpression */);
+        var node = createSynthesizedNode(192);
         node.modifiers = asNodeArray(modifiers);
         node.asteriskToken = asteriskToken;
         node.name = asName(name);
@@ -56089,12 +46808,12 @@ var ts;
     }
     ts.updateFunctionExpression = updateFunctionExpression;
     function createArrowFunction(modifiers, typeParameters, parameters, type, equalsGreaterThanToken, body) {
-        var node = createSynthesizedNode(193 /* ArrowFunction */);
+        var node = createSynthesizedNode(193);
         node.modifiers = asNodeArray(modifiers);
         node.typeParameters = asNodeArray(typeParameters);
         node.parameters = createNodeArray(parameters);
         node.type = type;
-        node.equalsGreaterThanToken = equalsGreaterThanToken || createToken(36 /* EqualsGreaterThanToken */);
+        node.equalsGreaterThanToken = equalsGreaterThanToken || createToken(36);
         node.body = ts.parenthesizeConciseBody(body);
         return node;
     }
@@ -56108,7 +46827,7 @@ var ts;
         }
         else {
             equalsGreaterThanToken = ts.cast(equalsGreaterThanTokenOrBody, function (n) {
-                return n.kind === 36 /* EqualsGreaterThanToken */;
+                return n.kind === 36;
             });
             body = bodyOrUndefined;
         }
@@ -56123,7 +46842,7 @@ var ts;
     }
     ts.updateArrowFunction = updateArrowFunction;
     function createDelete(expression) {
-        var node = createSynthesizedNode(194 /* DeleteExpression */);
+        var node = createSynthesizedNode(194);
         node.expression = ts.parenthesizePrefixOperand(expression);
         return node;
     }
@@ -56135,7 +46854,7 @@ var ts;
     }
     ts.updateDelete = updateDelete;
     function createTypeOf(expression) {
-        var node = createSynthesizedNode(195 /* TypeOfExpression */);
+        var node = createSynthesizedNode(195);
         node.expression = ts.parenthesizePrefixOperand(expression);
         return node;
     }
@@ -56147,7 +46866,7 @@ var ts;
     }
     ts.updateTypeOf = updateTypeOf;
     function createVoid(expression) {
-        var node = createSynthesizedNode(196 /* VoidExpression */);
+        var node = createSynthesizedNode(196);
         node.expression = ts.parenthesizePrefixOperand(expression);
         return node;
     }
@@ -56159,7 +46878,7 @@ var ts;
     }
     ts.updateVoid = updateVoid;
     function createAwait(expression) {
-        var node = createSynthesizedNode(197 /* AwaitExpression */);
+        var node = createSynthesizedNode(197);
         node.expression = ts.parenthesizePrefixOperand(expression);
         return node;
     }
@@ -56171,7 +46890,7 @@ var ts;
     }
     ts.updateAwait = updateAwait;
     function createPrefix(operator, operand) {
-        var node = createSynthesizedNode(198 /* PrefixUnaryExpression */);
+        var node = createSynthesizedNode(198);
         node.operator = operator;
         node.operand = ts.parenthesizePrefixOperand(operand);
         return node;
@@ -56184,7 +46903,7 @@ var ts;
     }
     ts.updatePrefix = updatePrefix;
     function createPostfix(operand, operator) {
-        var node = createSynthesizedNode(199 /* PostfixUnaryExpression */);
+        var node = createSynthesizedNode(199);
         node.operand = ts.parenthesizePostfixOperand(operand);
         node.operator = operator;
         return node;
@@ -56197,12 +46916,12 @@ var ts;
     }
     ts.updatePostfix = updatePostfix;
     function createBinary(left, operator, right) {
-        var node = createSynthesizedNode(200 /* BinaryExpression */);
+        var node = createSynthesizedNode(200);
         var operatorToken = asToken(operator);
         var operatorKind = operatorToken.kind;
-        node.left = ts.parenthesizeBinaryOperand(operatorKind, left, /*isLeftSideOfBinary*/ true, /*leftOperand*/ undefined);
+        node.left = ts.parenthesizeBinaryOperand(operatorKind, left, true, undefined);
         node.operatorToken = operatorToken;
-        node.right = ts.parenthesizeBinaryOperand(operatorKind, right, /*isLeftSideOfBinary*/ false, node.left);
+        node.right = ts.parenthesizeBinaryOperand(operatorKind, right, false, node.left);
         return node;
     }
     ts.createBinary = createBinary;
@@ -56214,11 +46933,11 @@ var ts;
     }
     ts.updateBinary = updateBinary;
     function createConditional(condition, questionTokenOrWhenTrue, whenTrueOrWhenFalse, colonToken, whenFalse) {
-        var node = createSynthesizedNode(201 /* ConditionalExpression */);
+        var node = createSynthesizedNode(201);
         node.condition = ts.parenthesizeForConditionalHead(condition);
-        node.questionToken = whenFalse ? questionTokenOrWhenTrue : createToken(55 /* QuestionToken */);
+        node.questionToken = whenFalse ? questionTokenOrWhenTrue : createToken(55);
         node.whenTrue = ts.parenthesizeSubexpressionOfConditionalExpression(whenFalse ? whenTrueOrWhenFalse : questionTokenOrWhenTrue);
-        node.colonToken = whenFalse ? colonToken : createToken(56 /* ColonToken */);
+        node.colonToken = whenFalse ? colonToken : createToken(56);
         node.whenFalse = ts.parenthesizeSubexpressionOfConditionalExpression(whenFalse ? whenFalse : whenTrueOrWhenFalse);
         return node;
     }
@@ -56244,7 +46963,7 @@ var ts;
     }
     ts.updateConditional = updateConditional;
     function createTemplateExpression(head, templateSpans) {
-        var node = createSynthesizedNode(202 /* TemplateExpression */);
+        var node = createSynthesizedNode(202);
         node.head = head;
         node.templateSpans = createNodeArray(templateSpans);
         return node;
@@ -56258,33 +46977,33 @@ var ts;
     }
     ts.updateTemplateExpression = updateTemplateExpression;
     function createTemplateHead(text) {
-        var node = createSynthesizedNode(14 /* TemplateHead */);
+        var node = createSynthesizedNode(14);
         node.text = text;
         return node;
     }
     ts.createTemplateHead = createTemplateHead;
     function createTemplateMiddle(text) {
-        var node = createSynthesizedNode(15 /* TemplateMiddle */);
+        var node = createSynthesizedNode(15);
         node.text = text;
         return node;
     }
     ts.createTemplateMiddle = createTemplateMiddle;
     function createTemplateTail(text) {
-        var node = createSynthesizedNode(16 /* TemplateTail */);
+        var node = createSynthesizedNode(16);
         node.text = text;
         return node;
     }
     ts.createTemplateTail = createTemplateTail;
     function createNoSubstitutionTemplateLiteral(text) {
-        var node = createSynthesizedNode(13 /* NoSubstitutionTemplateLiteral */);
+        var node = createSynthesizedNode(13);
         node.text = text;
         return node;
     }
     ts.createNoSubstitutionTemplateLiteral = createNoSubstitutionTemplateLiteral;
     function createYield(asteriskTokenOrExpression, expression) {
-        var node = createSynthesizedNode(203 /* YieldExpression */);
-        node.asteriskToken = asteriskTokenOrExpression && asteriskTokenOrExpression.kind === 39 /* AsteriskToken */ ? asteriskTokenOrExpression : undefined;
-        node.expression = asteriskTokenOrExpression && asteriskTokenOrExpression.kind !== 39 /* AsteriskToken */ ? asteriskTokenOrExpression : expression;
+        var node = createSynthesizedNode(203);
+        node.asteriskToken = asteriskTokenOrExpression && asteriskTokenOrExpression.kind === 39 ? asteriskTokenOrExpression : undefined;
+        node.expression = asteriskTokenOrExpression && asteriskTokenOrExpression.kind !== 39 ? asteriskTokenOrExpression : expression;
         return node;
     }
     ts.createYield = createYield;
@@ -56296,7 +47015,7 @@ var ts;
     }
     ts.updateYield = updateYield;
     function createSpread(expression) {
-        var node = createSynthesizedNode(204 /* SpreadElement */);
+        var node = createSynthesizedNode(204);
         node.expression = ts.parenthesizeExpressionForList(expression);
         return node;
     }
@@ -56308,7 +47027,7 @@ var ts;
     }
     ts.updateSpread = updateSpread;
     function createClassExpression(modifiers, name, typeParameters, heritageClauses, members) {
-        var node = createSynthesizedNode(205 /* ClassExpression */);
+        var node = createSynthesizedNode(205);
         node.decorators = undefined;
         node.modifiers = asNodeArray(modifiers);
         node.name = asName(name);
@@ -56329,11 +47048,11 @@ var ts;
     }
     ts.updateClassExpression = updateClassExpression;
     function createOmittedExpression() {
-        return createSynthesizedNode(206 /* OmittedExpression */);
+        return createSynthesizedNode(206);
     }
     ts.createOmittedExpression = createOmittedExpression;
     function createExpressionWithTypeArguments(typeArguments, expression) {
-        var node = createSynthesizedNode(207 /* ExpressionWithTypeArguments */);
+        var node = createSynthesizedNode(207);
         node.expression = ts.parenthesizeForAccess(expression);
         node.typeArguments = asNodeArray(typeArguments);
         return node;
@@ -56347,7 +47066,7 @@ var ts;
     }
     ts.updateExpressionWithTypeArguments = updateExpressionWithTypeArguments;
     function createAsExpression(expression, type) {
-        var node = createSynthesizedNode(208 /* AsExpression */);
+        var node = createSynthesizedNode(208);
         node.expression = expression;
         node.type = type;
         return node;
@@ -56361,7 +47080,7 @@ var ts;
     }
     ts.updateAsExpression = updateAsExpression;
     function createNonNullExpression(expression) {
-        var node = createSynthesizedNode(209 /* NonNullExpression */);
+        var node = createSynthesizedNode(209);
         node.expression = ts.parenthesizeForAccess(expression);
         return node;
     }
@@ -56373,7 +47092,7 @@ var ts;
     }
     ts.updateNonNullExpression = updateNonNullExpression;
     function createMetaProperty(keywordToken, name) {
-        var node = createSynthesizedNode(210 /* MetaProperty */);
+        var node = createSynthesizedNode(210);
         node.keywordToken = keywordToken;
         node.name = name;
         return node;
@@ -56385,9 +47104,8 @@ var ts;
             : node;
     }
     ts.updateMetaProperty = updateMetaProperty;
-    // Misc
     function createTemplateSpan(expression, literal) {
-        var node = createSynthesizedNode(211 /* TemplateSpan */);
+        var node = createSynthesizedNode(211);
         node.expression = expression;
         node.literal = literal;
         return node;
@@ -56401,21 +47119,19 @@ var ts;
     }
     ts.updateTemplateSpan = updateTemplateSpan;
     function createSemicolonClassElement() {
-        return createSynthesizedNode(212 /* SemicolonClassElement */);
+        return createSynthesizedNode(212);
     }
     ts.createSemicolonClassElement = createSemicolonClassElement;
-    // Element
     function createBlock(statements, multiLine) {
-        var block = createSynthesizedNode(213 /* Block */);
+        var block = createSynthesizedNode(213);
         block.statements = createNodeArray(statements);
         if (multiLine)
             block.multiLine = multiLine;
         return block;
     }
     ts.createBlock = createBlock;
-    /* @internal */
     function createExpressionStatement(expression) {
-        var node = createSynthesizedNode(216 /* ExpressionStatement */);
+        var node = createSynthesizedNode(216);
         node.expression = expression;
         return node;
     }
@@ -56427,7 +47143,7 @@ var ts;
     }
     ts.updateBlock = updateBlock;
     function createVariableStatement(modifiers, declarationList) {
-        var node = createSynthesizedNode(214 /* VariableStatement */);
+        var node = createSynthesizedNode(214);
         node.decorators = undefined;
         node.modifiers = asNodeArray(modifiers);
         node.declarationList = ts.isArray(declarationList) ? createVariableDeclarationList(declarationList) : declarationList;
@@ -56442,7 +47158,7 @@ var ts;
     }
     ts.updateVariableStatement = updateVariableStatement;
     function createEmptyStatement() {
-        return createSynthesizedNode(215 /* EmptyStatement */);
+        return createSynthesizedNode(215);
     }
     ts.createEmptyStatement = createEmptyStatement;
     function createStatement(expression) {
@@ -56456,7 +47172,7 @@ var ts;
     }
     ts.updateStatement = updateStatement;
     function createIf(expression, thenStatement, elseStatement) {
-        var node = createSynthesizedNode(217 /* IfStatement */);
+        var node = createSynthesizedNode(217);
         node.expression = expression;
         node.thenStatement = thenStatement;
         node.elseStatement = elseStatement;
@@ -56472,7 +47188,7 @@ var ts;
     }
     ts.updateIf = updateIf;
     function createDo(statement, expression) {
-        var node = createSynthesizedNode(218 /* DoStatement */);
+        var node = createSynthesizedNode(218);
         node.statement = statement;
         node.expression = expression;
         return node;
@@ -56486,7 +47202,7 @@ var ts;
     }
     ts.updateDo = updateDo;
     function createWhile(expression, statement) {
-        var node = createSynthesizedNode(219 /* WhileStatement */);
+        var node = createSynthesizedNode(219);
         node.expression = expression;
         node.statement = statement;
         return node;
@@ -56500,7 +47216,7 @@ var ts;
     }
     ts.updateWhile = updateWhile;
     function createFor(initializer, condition, incrementor, statement) {
-        var node = createSynthesizedNode(220 /* ForStatement */);
+        var node = createSynthesizedNode(220);
         node.initializer = initializer;
         node.condition = condition;
         node.incrementor = incrementor;
@@ -56518,7 +47234,7 @@ var ts;
     }
     ts.updateFor = updateFor;
     function createForIn(initializer, expression, statement) {
-        var node = createSynthesizedNode(221 /* ForInStatement */);
+        var node = createSynthesizedNode(221);
         node.initializer = initializer;
         node.expression = expression;
         node.statement = statement;
@@ -56534,7 +47250,7 @@ var ts;
     }
     ts.updateForIn = updateForIn;
     function createForOf(awaitModifier, initializer, expression, statement) {
-        var node = createSynthesizedNode(222 /* ForOfStatement */);
+        var node = createSynthesizedNode(222);
         node.awaitModifier = awaitModifier;
         node.initializer = initializer;
         node.expression = expression;
@@ -56552,7 +47268,7 @@ var ts;
     }
     ts.updateForOf = updateForOf;
     function createContinue(label) {
-        var node = createSynthesizedNode(223 /* ContinueStatement */);
+        var node = createSynthesizedNode(223);
         node.label = asName(label);
         return node;
     }
@@ -56564,7 +47280,7 @@ var ts;
     }
     ts.updateContinue = updateContinue;
     function createBreak(label) {
-        var node = createSynthesizedNode(224 /* BreakStatement */);
+        var node = createSynthesizedNode(224);
         node.label = asName(label);
         return node;
     }
@@ -56576,7 +47292,7 @@ var ts;
     }
     ts.updateBreak = updateBreak;
     function createReturn(expression) {
-        var node = createSynthesizedNode(225 /* ReturnStatement */);
+        var node = createSynthesizedNode(225);
         node.expression = expression;
         return node;
     }
@@ -56588,7 +47304,7 @@ var ts;
     }
     ts.updateReturn = updateReturn;
     function createWith(expression, statement) {
-        var node = createSynthesizedNode(226 /* WithStatement */);
+        var node = createSynthesizedNode(226);
         node.expression = expression;
         node.statement = statement;
         return node;
@@ -56602,7 +47318,7 @@ var ts;
     }
     ts.updateWith = updateWith;
     function createSwitch(expression, caseBlock) {
-        var node = createSynthesizedNode(227 /* SwitchStatement */);
+        var node = createSynthesizedNode(227);
         node.expression = ts.parenthesizeExpressionForList(expression);
         node.caseBlock = caseBlock;
         return node;
@@ -56616,7 +47332,7 @@ var ts;
     }
     ts.updateSwitch = updateSwitch;
     function createLabel(label, statement) {
-        var node = createSynthesizedNode(228 /* LabeledStatement */);
+        var node = createSynthesizedNode(228);
         node.label = asName(label);
         node.statement = statement;
         return node;
@@ -56630,7 +47346,7 @@ var ts;
     }
     ts.updateLabel = updateLabel;
     function createThrow(expression) {
-        var node = createSynthesizedNode(229 /* ThrowStatement */);
+        var node = createSynthesizedNode(229);
         node.expression = expression;
         return node;
     }
@@ -56642,7 +47358,7 @@ var ts;
     }
     ts.updateThrow = updateThrow;
     function createTry(tryBlock, catchClause, finallyBlock) {
-        var node = createSynthesizedNode(230 /* TryStatement */);
+        var node = createSynthesizedNode(230);
         node.tryBlock = tryBlock;
         node.catchClause = catchClause;
         node.finallyBlock = finallyBlock;
@@ -56658,11 +47374,11 @@ var ts;
     }
     ts.updateTry = updateTry;
     function createDebuggerStatement() {
-        return createSynthesizedNode(231 /* DebuggerStatement */);
+        return createSynthesizedNode(231);
     }
     ts.createDebuggerStatement = createDebuggerStatement;
     function createVariableDeclaration(name, type, initializer) {
-        var node = createSynthesizedNode(232 /* VariableDeclaration */);
+        var node = createSynthesizedNode(232);
         node.name = asName(name);
         node.type = type;
         node.initializer = initializer !== undefined ? ts.parenthesizeExpressionForList(initializer) : undefined;
@@ -56678,9 +47394,9 @@ var ts;
     }
     ts.updateVariableDeclaration = updateVariableDeclaration;
     function createVariableDeclarationList(declarations, flags) {
-        if (flags === void 0) { flags = 0 /* None */; }
-        var node = createSynthesizedNode(233 /* VariableDeclarationList */);
-        node.flags |= flags & 3 /* BlockScoped */;
+        if (flags === void 0) { flags = 0; }
+        var node = createSynthesizedNode(233);
+        node.flags |= flags & 3;
         node.declarations = createNodeArray(declarations);
         return node;
     }
@@ -56692,7 +47408,7 @@ var ts;
     }
     ts.updateVariableDeclarationList = updateVariableDeclarationList;
     function createFunctionDeclaration(decorators, modifiers, asteriskToken, name, typeParameters, parameters, type, body) {
-        var node = createSynthesizedNode(234 /* FunctionDeclaration */);
+        var node = createSynthesizedNode(234);
         node.decorators = asNodeArray(decorators);
         node.modifiers = asNodeArray(modifiers);
         node.asteriskToken = asteriskToken;
@@ -56718,7 +47434,7 @@ var ts;
     }
     ts.updateFunctionDeclaration = updateFunctionDeclaration;
     function createClassDeclaration(decorators, modifiers, name, typeParameters, heritageClauses, members) {
-        var node = createSynthesizedNode(235 /* ClassDeclaration */);
+        var node = createSynthesizedNode(235);
         node.decorators = asNodeArray(decorators);
         node.modifiers = asNodeArray(modifiers);
         node.name = asName(name);
@@ -56740,7 +47456,7 @@ var ts;
     }
     ts.updateClassDeclaration = updateClassDeclaration;
     function createInterfaceDeclaration(decorators, modifiers, name, typeParameters, heritageClauses, members) {
-        var node = createSynthesizedNode(236 /* InterfaceDeclaration */);
+        var node = createSynthesizedNode(236);
         node.decorators = asNodeArray(decorators);
         node.modifiers = asNodeArray(modifiers);
         node.name = asName(name);
@@ -56762,7 +47478,7 @@ var ts;
     }
     ts.updateInterfaceDeclaration = updateInterfaceDeclaration;
     function createTypeAliasDeclaration(decorators, modifiers, name, typeParameters, type) {
-        var node = createSynthesizedNode(237 /* TypeAliasDeclaration */);
+        var node = createSynthesizedNode(237);
         node.decorators = asNodeArray(decorators);
         node.modifiers = asNodeArray(modifiers);
         node.name = asName(name);
@@ -56782,7 +47498,7 @@ var ts;
     }
     ts.updateTypeAliasDeclaration = updateTypeAliasDeclaration;
     function createEnumDeclaration(decorators, modifiers, name, members) {
-        var node = createSynthesizedNode(238 /* EnumDeclaration */);
+        var node = createSynthesizedNode(238);
         node.decorators = asNodeArray(decorators);
         node.modifiers = asNodeArray(modifiers);
         node.name = asName(name);
@@ -56800,9 +47516,9 @@ var ts;
     }
     ts.updateEnumDeclaration = updateEnumDeclaration;
     function createModuleDeclaration(decorators, modifiers, name, body, flags) {
-        if (flags === void 0) { flags = 0 /* None */; }
-        var node = createSynthesizedNode(239 /* ModuleDeclaration */);
-        node.flags |= flags & (16 /* Namespace */ | 4 /* NestedNamespace */ | 512 /* GlobalAugmentation */);
+        if (flags === void 0) { flags = 0; }
+        var node = createSynthesizedNode(239);
+        node.flags |= flags & (16 | 4 | 512);
         node.decorators = asNodeArray(decorators);
         node.modifiers = asNodeArray(modifiers);
         node.name = name;
@@ -56820,7 +47536,7 @@ var ts;
     }
     ts.updateModuleDeclaration = updateModuleDeclaration;
     function createModuleBlock(statements) {
-        var node = createSynthesizedNode(240 /* ModuleBlock */);
+        var node = createSynthesizedNode(240);
         node.statements = createNodeArray(statements);
         return node;
     }
@@ -56832,7 +47548,7 @@ var ts;
     }
     ts.updateModuleBlock = updateModuleBlock;
     function createCaseBlock(clauses) {
-        var node = createSynthesizedNode(241 /* CaseBlock */);
+        var node = createSynthesizedNode(241);
         node.clauses = createNodeArray(clauses);
         return node;
     }
@@ -56844,7 +47560,7 @@ var ts;
     }
     ts.updateCaseBlock = updateCaseBlock;
     function createNamespaceExportDeclaration(name) {
-        var node = createSynthesizedNode(242 /* NamespaceExportDeclaration */);
+        var node = createSynthesizedNode(242);
         node.name = asName(name);
         return node;
     }
@@ -56856,7 +47572,7 @@ var ts;
     }
     ts.updateNamespaceExportDeclaration = updateNamespaceExportDeclaration;
     function createImportEqualsDeclaration(decorators, modifiers, name, moduleReference) {
-        var node = createSynthesizedNode(243 /* ImportEqualsDeclaration */);
+        var node = createSynthesizedNode(243);
         node.decorators = asNodeArray(decorators);
         node.modifiers = asNodeArray(modifiers);
         node.name = asName(name);
@@ -56874,7 +47590,7 @@ var ts;
     }
     ts.updateImportEqualsDeclaration = updateImportEqualsDeclaration;
     function createImportDeclaration(decorators, modifiers, importClause, moduleSpecifier) {
-        var node = createSynthesizedNode(244 /* ImportDeclaration */);
+        var node = createSynthesizedNode(244);
         node.decorators = asNodeArray(decorators);
         node.modifiers = asNodeArray(modifiers);
         node.importClause = importClause;
@@ -56892,7 +47608,7 @@ var ts;
     }
     ts.updateImportDeclaration = updateImportDeclaration;
     function createImportClause(name, namedBindings) {
-        var node = createSynthesizedNode(245 /* ImportClause */);
+        var node = createSynthesizedNode(245);
         node.name = name;
         node.namedBindings = namedBindings;
         return node;
@@ -56906,7 +47622,7 @@ var ts;
     }
     ts.updateImportClause = updateImportClause;
     function createNamespaceImport(name) {
-        var node = createSynthesizedNode(246 /* NamespaceImport */);
+        var node = createSynthesizedNode(246);
         node.name = name;
         return node;
     }
@@ -56918,7 +47634,7 @@ var ts;
     }
     ts.updateNamespaceImport = updateNamespaceImport;
     function createNamedImports(elements) {
-        var node = createSynthesizedNode(247 /* NamedImports */);
+        var node = createSynthesizedNode(247);
         node.elements = createNodeArray(elements);
         return node;
     }
@@ -56930,7 +47646,7 @@ var ts;
     }
     ts.updateNamedImports = updateNamedImports;
     function createImportSpecifier(propertyName, name) {
-        var node = createSynthesizedNode(248 /* ImportSpecifier */);
+        var node = createSynthesizedNode(248);
         node.propertyName = propertyName;
         node.name = name;
         return node;
@@ -56944,11 +47660,11 @@ var ts;
     }
     ts.updateImportSpecifier = updateImportSpecifier;
     function createExportAssignment(decorators, modifiers, isExportEquals, expression) {
-        var node = createSynthesizedNode(249 /* ExportAssignment */);
+        var node = createSynthesizedNode(249);
         node.decorators = asNodeArray(decorators);
         node.modifiers = asNodeArray(modifiers);
         node.isExportEquals = isExportEquals;
-        node.expression = isExportEquals ? ts.parenthesizeBinaryOperand(58 /* EqualsToken */, expression, /*isLeftSideOfBinary*/ false, /*leftOperand*/ undefined) : ts.parenthesizeDefaultExpression(expression);
+        node.expression = isExportEquals ? ts.parenthesizeBinaryOperand(58, expression, false, undefined) : ts.parenthesizeDefaultExpression(expression);
         return node;
     }
     ts.createExportAssignment = createExportAssignment;
@@ -56961,7 +47677,7 @@ var ts;
     }
     ts.updateExportAssignment = updateExportAssignment;
     function createExportDeclaration(decorators, modifiers, exportClause, moduleSpecifier) {
-        var node = createSynthesizedNode(250 /* ExportDeclaration */);
+        var node = createSynthesizedNode(250);
         node.decorators = asNodeArray(decorators);
         node.modifiers = asNodeArray(modifiers);
         node.exportClause = exportClause;
@@ -56979,7 +47695,7 @@ var ts;
     }
     ts.updateExportDeclaration = updateExportDeclaration;
     function createNamedExports(elements) {
-        var node = createSynthesizedNode(251 /* NamedExports */);
+        var node = createSynthesizedNode(251);
         node.elements = createNodeArray(elements);
         return node;
     }
@@ -56991,7 +47707,7 @@ var ts;
     }
     ts.updateNamedExports = updateNamedExports;
     function createExportSpecifier(propertyName, name) {
-        var node = createSynthesizedNode(252 /* ExportSpecifier */);
+        var node = createSynthesizedNode(252);
         node.propertyName = asName(propertyName);
         node.name = asName(name);
         return node;
@@ -57004,9 +47720,8 @@ var ts;
             : node;
     }
     ts.updateExportSpecifier = updateExportSpecifier;
-    // Module references
     function createExternalModuleReference(expression) {
-        var node = createSynthesizedNode(254 /* ExternalModuleReference */);
+        var node = createSynthesizedNode(254);
         node.expression = expression;
         return node;
     }
@@ -57017,9 +47732,8 @@ var ts;
             : node;
     }
     ts.updateExternalModuleReference = updateExternalModuleReference;
-    // JSX
     function createJsxElement(openingElement, children, closingElement) {
-        var node = createSynthesizedNode(255 /* JsxElement */);
+        var node = createSynthesizedNode(255);
         node.openingElement = openingElement;
         node.children = createNodeArray(children);
         node.closingElement = closingElement;
@@ -57035,7 +47749,7 @@ var ts;
     }
     ts.updateJsxElement = updateJsxElement;
     function createJsxSelfClosingElement(tagName, typeArguments, attributes) {
-        var node = createSynthesizedNode(256 /* JsxSelfClosingElement */);
+        var node = createSynthesizedNode(256);
         node.tagName = tagName;
         node.typeArguments = typeArguments && createNodeArray(typeArguments);
         node.attributes = attributes;
@@ -57051,7 +47765,7 @@ var ts;
     }
     ts.updateJsxSelfClosingElement = updateJsxSelfClosingElement;
     function createJsxOpeningElement(tagName, typeArguments, attributes) {
-        var node = createSynthesizedNode(257 /* JsxOpeningElement */);
+        var node = createSynthesizedNode(257);
         node.tagName = tagName;
         node.typeArguments = typeArguments && createNodeArray(typeArguments);
         node.attributes = attributes;
@@ -57067,7 +47781,7 @@ var ts;
     }
     ts.updateJsxOpeningElement = updateJsxOpeningElement;
     function createJsxClosingElement(tagName) {
-        var node = createSynthesizedNode(258 /* JsxClosingElement */);
+        var node = createSynthesizedNode(258);
         node.tagName = tagName;
         return node;
     }
@@ -57079,7 +47793,7 @@ var ts;
     }
     ts.updateJsxClosingElement = updateJsxClosingElement;
     function createJsxFragment(openingFragment, children, closingFragment) {
-        var node = createSynthesizedNode(259 /* JsxFragment */);
+        var node = createSynthesizedNode(259);
         node.openingFragment = openingFragment;
         node.children = createNodeArray(children);
         node.closingFragment = closingFragment;
@@ -57095,7 +47809,7 @@ var ts;
     }
     ts.updateJsxFragment = updateJsxFragment;
     function createJsxAttribute(name, initializer) {
-        var node = createSynthesizedNode(262 /* JsxAttribute */);
+        var node = createSynthesizedNode(262);
         node.name = name;
         node.initializer = initializer;
         return node;
@@ -57109,7 +47823,7 @@ var ts;
     }
     ts.updateJsxAttribute = updateJsxAttribute;
     function createJsxAttributes(properties) {
-        var node = createSynthesizedNode(263 /* JsxAttributes */);
+        var node = createSynthesizedNode(263);
         node.properties = createNodeArray(properties);
         return node;
     }
@@ -57121,7 +47835,7 @@ var ts;
     }
     ts.updateJsxAttributes = updateJsxAttributes;
     function createJsxSpreadAttribute(expression) {
-        var node = createSynthesizedNode(264 /* JsxSpreadAttribute */);
+        var node = createSynthesizedNode(264);
         node.expression = expression;
         return node;
     }
@@ -57133,7 +47847,7 @@ var ts;
     }
     ts.updateJsxSpreadAttribute = updateJsxSpreadAttribute;
     function createJsxExpression(dotDotDotToken, expression) {
-        var node = createSynthesizedNode(265 /* JsxExpression */);
+        var node = createSynthesizedNode(265);
         node.dotDotDotToken = dotDotDotToken;
         node.expression = expression;
         return node;
@@ -57145,9 +47859,8 @@ var ts;
             : node;
     }
     ts.updateJsxExpression = updateJsxExpression;
-    // Clauses
     function createCaseClause(expression, statements) {
-        var node = createSynthesizedNode(266 /* CaseClause */);
+        var node = createSynthesizedNode(266);
         node.expression = ts.parenthesizeExpressionForList(expression);
         node.statements = createNodeArray(statements);
         return node;
@@ -57161,7 +47874,7 @@ var ts;
     }
     ts.updateCaseClause = updateCaseClause;
     function createDefaultClause(statements) {
-        var node = createSynthesizedNode(267 /* DefaultClause */);
+        var node = createSynthesizedNode(267);
         node.statements = createNodeArray(statements);
         return node;
     }
@@ -57173,7 +47886,7 @@ var ts;
     }
     ts.updateDefaultClause = updateDefaultClause;
     function createHeritageClause(token, types) {
-        var node = createSynthesizedNode(268 /* HeritageClause */);
+        var node = createSynthesizedNode(268);
         node.token = token;
         node.types = createNodeArray(types);
         return node;
@@ -57186,7 +47899,7 @@ var ts;
     }
     ts.updateHeritageClause = updateHeritageClause;
     function createCatchClause(variableDeclaration, block) {
-        var node = createSynthesizedNode(269 /* CatchClause */);
+        var node = createSynthesizedNode(269);
         node.variableDeclaration = ts.isString(variableDeclaration) ? createVariableDeclaration(variableDeclaration) : variableDeclaration;
         node.block = block;
         return node;
@@ -57199,9 +47912,8 @@ var ts;
             : node;
     }
     ts.updateCatchClause = updateCatchClause;
-    // Property assignments
     function createPropertyAssignment(name, initializer) {
-        var node = createSynthesizedNode(270 /* PropertyAssignment */);
+        var node = createSynthesizedNode(270);
         node.name = asName(name);
         node.questionToken = undefined;
         node.initializer = ts.parenthesizeExpressionForList(initializer);
@@ -57216,7 +47928,7 @@ var ts;
     }
     ts.updatePropertyAssignment = updatePropertyAssignment;
     function createShorthandPropertyAssignment(name, objectAssignmentInitializer) {
-        var node = createSynthesizedNode(271 /* ShorthandPropertyAssignment */);
+        var node = createSynthesizedNode(271);
         node.name = asName(name);
         node.objectAssignmentInitializer = objectAssignmentInitializer !== undefined ? ts.parenthesizeExpressionForList(objectAssignmentInitializer) : undefined;
         return node;
@@ -57230,8 +47942,8 @@ var ts;
     }
     ts.updateShorthandPropertyAssignment = updateShorthandPropertyAssignment;
     function createSpreadAssignment(expression) {
-        var node = createSynthesizedNode(272 /* SpreadAssignment */);
-        node.expression = expression !== undefined ? ts.parenthesizeExpressionForList(expression) : undefined; // TODO: GH#18217
+        var node = createSynthesizedNode(272);
+        node.expression = expression !== undefined ? ts.parenthesizeExpressionForList(expression) : undefined;
         return node;
     }
     ts.createSpreadAssignment = createSpreadAssignment;
@@ -57241,9 +47953,8 @@ var ts;
             : node;
     }
     ts.updateSpreadAssignment = updateSpreadAssignment;
-    // Enum
     function createEnumMember(name, initializer) {
-        var node = createSynthesizedNode(273 /* EnumMember */);
+        var node = createSynthesizedNode(273);
         node.name = asName(name);
         node.initializer = initializer && ts.parenthesizeExpressionForList(initializer);
         return node;
@@ -57256,7 +47967,6 @@ var ts;
             : node;
     }
     ts.updateEnumMember = updateEnumMember;
-    // Top-level nodes
     function updateSourceFileNode(node, statements, isDeclarationFile, referencedFiles, typeReferences, hasNoDefaultLib, libReferences) {
         if (node.statements !== statements ||
             (isDeclarationFile !== undefined && node.isDeclarationFile !== isDeclarationFile) ||
@@ -57264,7 +47974,7 @@ var ts;
             (typeReferences !== undefined && node.typeReferenceDirectives !== typeReferences) ||
             (libReferences !== undefined && node.libReferenceDirectives !== libReferences) ||
             (hasNoDefaultLib !== undefined && node.hasNoDefaultLib !== hasNoDefaultLib)) {
-            var updated = createSynthesizedNode(274 /* SourceFile */);
+            var updated = createSynthesizedNode(274);
             updated.flags |= node.flags;
             updated.statements = createNodeArray(statements);
             updated.endOfFileToken = node.endOfFileToken;
@@ -57329,9 +48039,6 @@ var ts;
         return node;
     }
     ts.updateSourceFileNode = updateSourceFileNode;
-    /**
-     * Creates a shallow, memberwise clone of a node for mutation.
-     */
     function getMutableClone(node) {
         var clone = getSynthesizedClone(node);
         clone.pos = node.pos;
@@ -57340,54 +48047,29 @@ var ts;
         return clone;
     }
     ts.getMutableClone = getMutableClone;
-    // Transformation nodes
-    /**
-     * Creates a synthetic statement to act as a placeholder for a not-emitted statement in
-     * order to preserve comments.
-     *
-     * @param original The original statement.
-     */
     function createNotEmittedStatement(original) {
-        var node = createSynthesizedNode(300 /* NotEmittedStatement */);
+        var node = createSynthesizedNode(300);
         node.original = original;
         setTextRange(node, original);
         return node;
     }
     ts.createNotEmittedStatement = createNotEmittedStatement;
-    /**
-     * Creates a synthetic element to act as a placeholder for the end of an emitted declaration in
-     * order to properly emit exports.
-     */
-    /* @internal */
     function createEndOfDeclarationMarker(original) {
-        var node = createSynthesizedNode(304 /* EndOfDeclarationMarker */);
+        var node = createSynthesizedNode(304);
         node.emitNode = {};
         node.original = original;
         return node;
     }
     ts.createEndOfDeclarationMarker = createEndOfDeclarationMarker;
-    /**
-     * Creates a synthetic element to act as a placeholder for the beginning of a merged declaration in
-     * order to properly emit exports.
-     */
-    /* @internal */
     function createMergeDeclarationMarker(original) {
-        var node = createSynthesizedNode(303 /* MergeDeclarationMarker */);
+        var node = createSynthesizedNode(303);
         node.emitNode = {};
         node.original = original;
         return node;
     }
     ts.createMergeDeclarationMarker = createMergeDeclarationMarker;
-    /**
-     * Creates a synthetic expression to act as a placeholder for a not-emitted expression in
-     * order to preserve comments or sourcemap positions.
-     *
-     * @param expression The inner expression to emit.
-     * @param original The original outer expression.
-     * @param location The location for the expression. Defaults to the positions from "original" if provided.
-     */
     function createPartiallyEmittedExpression(expression, original) {
-        var node = createSynthesizedNode(301 /* PartiallyEmittedExpression */);
+        var node = createSynthesizedNode(301);
         node.expression = expression;
         node.original = original;
         setTextRange(node, original);
@@ -57403,17 +48085,17 @@ var ts;
     ts.updatePartiallyEmittedExpression = updatePartiallyEmittedExpression;
     function flattenCommaElements(node) {
         if (ts.nodeIsSynthesized(node) && !ts.isParseTreeNode(node) && !node.original && !node.emitNode && !node.id) {
-            if (node.kind === 302 /* CommaListExpression */) {
+            if (node.kind === 302) {
                 return node.elements;
             }
-            if (ts.isBinaryExpression(node) && node.operatorToken.kind === 26 /* CommaToken */) {
+            if (ts.isBinaryExpression(node) && node.operatorToken.kind === 26) {
                 return [node.left, node.right];
             }
         }
         return node;
     }
     function createCommaList(elements) {
-        var node = createSynthesizedNode(302 /* CommaListExpression */);
+        var node = createSynthesizedNode(302);
         node.elements = createNodeArray(ts.sameFlatMap(elements, flattenCommaElements));
         return node;
     }
@@ -57426,21 +48108,21 @@ var ts;
     ts.updateCommaList = updateCommaList;
     function createBundle(sourceFiles, prepends) {
         if (prepends === void 0) { prepends = ts.emptyArray; }
-        var node = ts.createNode(275 /* Bundle */);
+        var node = ts.createNode(275);
         node.prepends = prepends;
         node.sourceFiles = sourceFiles;
         return node;
     }
     ts.createBundle = createBundle;
     function createUnparsedSourceFile(text, map) {
-        var node = ts.createNode(276 /* UnparsedSource */);
+        var node = ts.createNode(276);
         node.text = text;
         node.sourceMapText = map;
         return node;
     }
     ts.createUnparsedSourceFile = createUnparsedSourceFile;
     function createInputFiles(javascript, declaration, javascriptMapText, declarationMapText) {
-        var node = ts.createNode(277 /* InputFiles */);
+        var node = ts.createNode(277);
         node.javascriptText = javascript;
         node.javascriptMapText = javascriptMapText;
         node.declarationText = declaration;
@@ -57457,70 +48139,55 @@ var ts;
     }
     ts.updateBundle = updateBundle;
     function createImmediatelyInvokedFunctionExpression(statements, param, paramValue) {
-        return createCall(createFunctionExpression(
-        /*modifiers*/ undefined, 
-        /*asteriskToken*/ undefined, 
-        /*name*/ undefined, 
-        /*typeParameters*/ undefined, 
-        /*parameters*/ param ? [param] : [], 
-        /*type*/ undefined, createBlock(statements, /*multiLine*/ true)), 
-        /*typeArguments*/ undefined, 
-        /*argumentsArray*/ paramValue ? [paramValue] : []);
+        return createCall(createFunctionExpression(undefined, undefined, undefined, undefined, param ? [param] : [], undefined, createBlock(statements, true)), undefined, paramValue ? [paramValue] : []);
     }
     ts.createImmediatelyInvokedFunctionExpression = createImmediatelyInvokedFunctionExpression;
     function createImmediatelyInvokedArrowFunction(statements, param, paramValue) {
-        return createCall(createArrowFunction(
-        /*modifiers*/ undefined, 
-        /*typeParameters*/ undefined, 
-        /*parameters*/ param ? [param] : [], 
-        /*type*/ undefined, 
-        /*equalsGreaterThanToken*/ undefined, createBlock(statements, /*multiLine*/ true)), 
-        /*typeArguments*/ undefined, 
-        /*argumentsArray*/ paramValue ? [paramValue] : []);
+        return createCall(createArrowFunction(undefined, undefined, param ? [param] : [], undefined, undefined, createBlock(statements, true)), undefined, paramValue ? [paramValue] : []);
     }
     ts.createImmediatelyInvokedArrowFunction = createImmediatelyInvokedArrowFunction;
     function createComma(left, right) {
-        return createBinary(left, 26 /* CommaToken */, right);
+        return createBinary(left, 26, right);
     }
     ts.createComma = createComma;
     function createLessThan(left, right) {
-        return createBinary(left, 27 /* LessThanToken */, right);
+        return createBinary(left, 27, right);
     }
     ts.createLessThan = createLessThan;
     function createAssignment(left, right) {
-        return createBinary(left, 58 /* EqualsToken */, right);
+        return createBinary(left, 58, right);
     }
     ts.createAssignment = createAssignment;
     function createStrictEquality(left, right) {
-        return createBinary(left, 34 /* EqualsEqualsEqualsToken */, right);
+        return createBinary(left, 34, right);
     }
     ts.createStrictEquality = createStrictEquality;
     function createStrictInequality(left, right) {
-        return createBinary(left, 35 /* ExclamationEqualsEqualsToken */, right);
+        return createBinary(left, 35, right);
     }
     ts.createStrictInequality = createStrictInequality;
     function createAdd(left, right) {
-        return createBinary(left, 37 /* PlusToken */, right);
+        return createBinary(left, 37, right);
     }
     ts.createAdd = createAdd;
     function createSubtract(left, right) {
-        return createBinary(left, 38 /* MinusToken */, right);
+        return createBinary(left, 38, right);
     }
     ts.createSubtract = createSubtract;
     function createPostfixIncrement(operand) {
-        return createPostfix(operand, 43 /* PlusPlusToken */);
+        return createPostfix(operand, 43);
     }
     ts.createPostfixIncrement = createPostfixIncrement;
     function createLogicalAnd(left, right) {
-        return createBinary(left, 53 /* AmpersandAmpersandToken */, right);
+        return createBinary(left, 53, right);
     }
     ts.createLogicalAnd = createLogicalAnd;
     function createLogicalOr(left, right) {
-        return createBinary(left, 54 /* BarBarToken */, right);
+        return createBinary(left, 54, right);
     }
     ts.createLogicalOr = createLogicalOr;
     function createLogicalNot(operand) {
-        return createPrefix(51 /* ExclamationToken */, operand);
+        return createPrefix(51, operand);
     }
     ts.createLogicalNot = createLogicalNot;
     function createVoidZero() {
@@ -57528,14 +48195,13 @@ var ts;
     }
     ts.createVoidZero = createVoidZero;
     function createExportDefault(expression) {
-        return createExportAssignment(/*decorators*/ undefined, /*modifiers*/ undefined, /*isExportEquals*/ false, expression);
+        return createExportAssignment(undefined, undefined, false, expression);
     }
     ts.createExportDefault = createExportDefault;
     function createExternalModuleExport(exportName) {
-        return createExportDeclaration(/*decorators*/ undefined, /*modifiers*/ undefined, createNamedExports([createExportSpecifier(/*propertyName*/ undefined, exportName)]));
+        return createExportDeclaration(undefined, undefined, createNamedExports([createExportSpecifier(undefined, exportName)]));
     }
     ts.createExternalModuleExport = createExternalModuleExport;
-    // Utilities
     function asName(name) {
         return ts.isString(name) ? createIdentifier(name) : name;
     }
@@ -57548,17 +48214,7 @@ var ts;
     function asToken(value) {
         return typeof value === "number" ? createToken(value) : value;
     }
-    /**
-     * Clears any EmitNode entries from parse-tree nodes.
-     * @param sourceFile A source file.
-     */
     function disposeEmitNodes(sourceFile) {
-        // During transformation we may need to annotate a parse tree node with transient
-        // transformation properties. As parse tree nodes live longer than transformation
-        // nodes, we need to make sure we reclaim any memory allocated for custom ranges
-        // from these nodes to ensure we do not hold onto entire subtrees just for position
-        // information. We also need to reset these nodes to a pre-transformation state
-        // for incremental parsing scenarios so that we do not impact later emit.
         sourceFile = ts.getSourceFileOfNode(ts.getParseTreeNode(sourceFile));
         var emitNode = sourceFile && sourceFile.emitNode;
         var annotatedNodes = emitNode && emitNode.annotatedNodes;
@@ -57570,18 +48226,10 @@ var ts;
         }
     }
     ts.disposeEmitNodes = disposeEmitNodes;
-    /**
-     * Associates a node with the current transformation, initializing
-     * various transient transformation properties.
-     */
-    /* @internal */
     function getOrCreateEmitNode(node) {
         if (!node.emitNode) {
             if (ts.isParseTreeNode(node)) {
-                // To avoid holding onto transformation artifacts, we keep track of any
-                // parse tree node we are annotating. This allows us to clean them up after
-                // all transformations have completed.
-                if (node.kind === 274 /* SourceFile */) {
+                if (node.kind === 274) {
                     return node.emitNode = { annotatedNodes: [node] };
                 }
                 var sourceFile = ts.getSourceFileOfNode(node);
@@ -57600,61 +48248,38 @@ var ts;
         return range;
     }
     ts.setTextRange = setTextRange;
-    /**
-     * Sets flags that control emit behavior of a node.
-     */
     function setEmitFlags(node, emitFlags) {
         getOrCreateEmitNode(node).flags = emitFlags;
         return node;
     }
     ts.setEmitFlags = setEmitFlags;
-    /**
-     * Sets flags that control emit behavior of a node.
-     */
-    /* @internal */
     function addEmitFlags(node, emitFlags) {
         var emitNode = getOrCreateEmitNode(node);
         emitNode.flags = emitNode.flags | emitFlags;
         return node;
     }
     ts.addEmitFlags = addEmitFlags;
-    /**
-     * Gets a custom text range to use when emitting source maps.
-     */
     function getSourceMapRange(node) {
         var emitNode = node.emitNode;
         return (emitNode && emitNode.sourceMapRange) || node;
     }
     ts.getSourceMapRange = getSourceMapRange;
-    /**
-     * Sets a custom text range to use when emitting source maps.
-     */
     function setSourceMapRange(node, range) {
         getOrCreateEmitNode(node).sourceMapRange = range;
         return node;
     }
     ts.setSourceMapRange = setSourceMapRange;
-    // tslint:disable-next-line variable-name
     var SourceMapSource;
-    /**
-     * Create an external source map source file reference
-     */
     function createSourceMapSource(fileName, text, skipTrivia) {
         return new (SourceMapSource || (SourceMapSource = ts.objectAllocator.getSourceMapSourceConstructor()))(fileName, text, skipTrivia);
     }
     ts.createSourceMapSource = createSourceMapSource;
-    /**
-     * Gets the TextRange to use for source maps for a token of a node.
-     */
     function getTokenSourceMapRange(node, token) {
         var emitNode = node.emitNode;
         var tokenSourceMapRanges = emitNode && emitNode.tokenSourceMapRanges;
         return tokenSourceMapRanges && tokenSourceMapRanges[token];
     }
     ts.getTokenSourceMapRange = getTokenSourceMapRange;
-    /**
-     * Sets the TextRange to use for source maps for a token of a node.
-     */
     function setTokenSourceMapRange(node, token, range) {
         var emitNode = getOrCreateEmitNode(node);
         var tokenSourceMapRanges = emitNode.tokenSourceMapRanges || (emitNode.tokenSourceMapRanges = []);
@@ -57662,35 +48287,21 @@ var ts;
         return node;
     }
     ts.setTokenSourceMapRange = setTokenSourceMapRange;
-    /**
-     * Gets a custom text range to use when emitting comments.
-     */
-    /*@internal*/
     function getStartsOnNewLine(node) {
         var emitNode = node.emitNode;
         return emitNode && emitNode.startsOnNewLine;
     }
     ts.getStartsOnNewLine = getStartsOnNewLine;
-    /**
-     * Sets a custom text range to use when emitting comments.
-     */
-    /*@internal*/
     function setStartsOnNewLine(node, newLine) {
         getOrCreateEmitNode(node).startsOnNewLine = newLine;
         return node;
     }
     ts.setStartsOnNewLine = setStartsOnNewLine;
-    /**
-     * Gets a custom text range to use when emitting comments.
-     */
     function getCommentRange(node) {
         var emitNode = node.emitNode;
         return (emitNode && emitNode.commentRange) || node;
     }
     ts.getCommentRange = getCommentRange;
-    /**
-     * Sets a custom text range to use when emitting comments.
-     */
     function setCommentRange(node, range) {
         getOrCreateEmitNode(node).commentRange = range;
         return node;
@@ -57733,35 +48344,23 @@ var ts;
         return node;
     }
     ts.moveSyntheticComments = moveSyntheticComments;
-    /**
-     * Gets the constant value to emit for an expression.
-     */
     function getConstantValue(node) {
         var emitNode = node.emitNode;
         return emitNode && emitNode.constantValue;
     }
     ts.getConstantValue = getConstantValue;
-    /**
-     * Sets the constant value to emit for an expression.
-     */
     function setConstantValue(node, value) {
         var emitNode = getOrCreateEmitNode(node);
         emitNode.constantValue = value;
         return node;
     }
     ts.setConstantValue = setConstantValue;
-    /**
-     * Adds an EmitHelper to a node.
-     */
     function addEmitHelper(node, helper) {
         var emitNode = getOrCreateEmitNode(node);
         emitNode.helpers = ts.append(emitNode.helpers, helper);
         return node;
     }
     ts.addEmitHelper = addEmitHelper;
-    /**
-     * Add EmitHelpers to a node.
-     */
     function addEmitHelpers(node, helpers) {
         if (ts.some(helpers)) {
             var emitNode = getOrCreateEmitNode(node);
@@ -57773,9 +48372,6 @@ var ts;
         return node;
     }
     ts.addEmitHelpers = addEmitHelpers;
-    /**
-     * Removes an EmitHelper from a node.
-     */
     function removeEmitHelper(node, helper) {
         var emitNode = node.emitNode;
         if (emitNode) {
@@ -57787,17 +48383,11 @@ var ts;
         return false;
     }
     ts.removeEmitHelper = removeEmitHelper;
-    /**
-     * Gets the EmitHelpers of a node.
-     */
     function getEmitHelpers(node) {
         var emitNode = node.emitNode;
         return emitNode && emitNode.helpers;
     }
     ts.getEmitHelpers = getEmitHelpers;
-    /**
-     * Moves matching emit helpers from a source node to a target node.
-     */
     function moveEmitHelpers(source, target, predicate) {
         var sourceEmitNode = source.emitNode;
         var sourceEmitHelpers = sourceEmitNode && sourceEmitNode.helpers;
@@ -57820,16 +48410,15 @@ var ts;
         }
     }
     ts.moveEmitHelpers = moveEmitHelpers;
-    /* @internal */
     function compareEmitHelpers(x, y) {
         if (x === y)
-            return 0 /* EqualTo */;
+            return 0;
         if (x.priority === y.priority)
-            return 0 /* EqualTo */;
+            return 0;
         if (x.priority === undefined)
-            return 1 /* GreaterThan */;
+            return 1;
         if (y.priority === undefined)
-            return -1 /* LessThan */;
+            return -1;
         return ts.compareValues(x.priority, y.priority);
     }
     ts.compareEmitHelpers = compareEmitHelpers;
@@ -57847,7 +48436,6 @@ var ts;
         var flags = sourceEmitNode.flags, leadingComments = sourceEmitNode.leadingComments, trailingComments = sourceEmitNode.trailingComments, commentRange = sourceEmitNode.commentRange, sourceMapRange = sourceEmitNode.sourceMapRange, tokenSourceMapRanges = sourceEmitNode.tokenSourceMapRanges, constantValue = sourceEmitNode.constantValue, helpers = sourceEmitNode.helpers, startsOnNewLine = sourceEmitNode.startsOnNewLine;
         if (!destEmitNode)
             destEmitNode = {};
-        // We are using `.slice()` here in case `destEmitNode.leadingComments` is pushed to later.
         if (leadingComments)
             destEmitNode.leadingComments = ts.addRange(leadingComments.slice(), destEmitNode.leadingComments);
         if (trailingComments)
@@ -57877,7 +48465,6 @@ var ts;
         return destRanges;
     }
 })(ts || (ts = {}));
-/* @internal */
 (function (ts) {
     ts.nullTransformationContext = {
         enableEmitNotification: ts.noop,
@@ -57913,21 +48500,19 @@ var ts;
             var expression = ts.setTextRange(ts.isIdentifier(memberName)
                 ? ts.createPropertyAccess(target, memberName)
                 : ts.createElementAccess(target, memberName), memberName);
-            ts.getOrCreateEmitNode(expression).flags |= 64 /* NoNestedSourceMaps */;
+            ts.getOrCreateEmitNode(expression).flags |= 64;
             return expression;
         }
     }
     ts.createMemberAccessForPropertyName = createMemberAccessForPropertyName;
     function createFunctionCall(func, thisArg, argumentsList, location) {
-        return ts.setTextRange(ts.createCall(ts.createPropertyAccess(func, "call"), 
-        /*typeArguments*/ undefined, [
+        return ts.setTextRange(ts.createCall(ts.createPropertyAccess(func, "call"), undefined, [
             thisArg
         ].concat(argumentsList)), location);
     }
     ts.createFunctionCall = createFunctionCall;
     function createFunctionApply(func, thisArg, argumentsExpression, location) {
-        return ts.setTextRange(ts.createCall(ts.createPropertyAccess(func, "apply"), 
-        /*typeArguments*/ undefined, [
+        return ts.setTextRange(ts.createCall(ts.createPropertyAccess(func, "apply"), undefined, [
             thisArg,
             argumentsExpression
         ]), location);
@@ -57938,27 +48523,20 @@ var ts;
         if (start !== undefined) {
             argumentsList.push(typeof start === "number" ? ts.createLiteral(start) : start);
         }
-        return ts.createCall(ts.createPropertyAccess(array, "slice"), /*typeArguments*/ undefined, argumentsList);
+        return ts.createCall(ts.createPropertyAccess(array, "slice"), undefined, argumentsList);
     }
     ts.createArraySlice = createArraySlice;
     function createArrayConcat(array, values) {
-        return ts.createCall(ts.createPropertyAccess(array, "concat"), 
-        /*typeArguments*/ undefined, values);
+        return ts.createCall(ts.createPropertyAccess(array, "concat"), undefined, values);
     }
     ts.createArrayConcat = createArrayConcat;
     function createMathPow(left, right, location) {
-        return ts.setTextRange(ts.createCall(ts.createPropertyAccess(ts.createIdentifier("Math"), "pow"), 
-        /*typeArguments*/ undefined, [left, right]), location);
+        return ts.setTextRange(ts.createCall(ts.createPropertyAccess(ts.createIdentifier("Math"), "pow"), undefined, [left, right]), location);
     }
     ts.createMathPow = createMathPow;
     function createReactNamespace(reactNamespace, parent) {
-        // To ensure the emit resolver can properly resolve the namespace, we need to
-        // treat this identifier as if it were a source tree node by clearing the `Synthesized`
-        // flag and setting a parent node.
         var react = ts.createIdentifier(reactNamespace || "React");
-        react.flags &= ~8 /* Synthesized */;
-        // Set the parent that is in parse tree
-        // this makes sure that parent chain is intact for checker to traverse complete scope tree
+        react.flags &= ~8;
         react.parent = ts.getParseTreeNode(parent);
         return react;
     }
@@ -57998,8 +48576,7 @@ var ts;
                 argumentsList.push(children[0]);
             }
         }
-        return ts.setTextRange(ts.createCall(createJsxFactoryExpression(jsxFactoryEntity, reactNamespace, parentElement), 
-        /*typeArguments*/ undefined, argumentsList), location);
+        return ts.setTextRange(ts.createCall(createJsxFactoryExpression(jsxFactoryEntity, reactNamespace, parentElement), undefined, argumentsList), location);
     }
     ts.createExpressionForJsxElement = createExpressionForJsxElement;
     function createExpressionForJsxFragment(jsxFactoryEntity, reactNamespace, children, parentElement, location) {
@@ -58018,13 +48595,11 @@ var ts;
                 argumentsList.push(children[0]);
             }
         }
-        return ts.setTextRange(ts.createCall(createJsxFactoryExpression(jsxFactoryEntity, reactNamespace, parentElement), 
-        /*typeArguments*/ undefined, argumentsList), location);
+        return ts.setTextRange(ts.createCall(createJsxFactoryExpression(jsxFactoryEntity, reactNamespace, parentElement), undefined, argumentsList), location);
     }
     ts.createExpressionForJsxFragment = createExpressionForJsxFragment;
-    // Helpers
     function getHelperName(name) {
-        return ts.setEmitFlags(ts.createIdentifier(name), 4096 /* HelperName */ | 2 /* AdviseOnEmitNode */);
+        return ts.setEmitFlags(ts.createIdentifier(name), 4096 | 2);
     }
     ts.getHelperName = getHelperName;
     var valuesHelper = {
@@ -58034,8 +48609,7 @@ var ts;
     };
     function createValuesHelper(context, expression, location) {
         context.requestEmitHelper(valuesHelper);
-        return ts.setTextRange(ts.createCall(getHelperName("__values"), 
-        /*typeArguments*/ undefined, [expression]), location);
+        return ts.setTextRange(ts.createCall(getHelperName("__values"), undefined, [expression]), location);
     }
     ts.createValuesHelper = createValuesHelper;
     var readHelper = {
@@ -58045,8 +48619,7 @@ var ts;
     };
     function createReadHelper(context, iteratorRecord, count, location) {
         context.requestEmitHelper(readHelper);
-        return ts.setTextRange(ts.createCall(getHelperName("__read"), 
-        /*typeArguments*/ undefined, count !== undefined
+        return ts.setTextRange(ts.createCall(getHelperName("__read"), undefined, count !== undefined
             ? [iteratorRecord, ts.createLiteral(count)]
             : [iteratorRecord]), location);
     }
@@ -58059,23 +48632,18 @@ var ts;
     function createSpreadHelper(context, argumentList, location) {
         context.requestEmitHelper(readHelper);
         context.requestEmitHelper(spreadHelper);
-        return ts.setTextRange(ts.createCall(getHelperName("__spread"), 
-        /*typeArguments*/ undefined, argumentList), location);
+        return ts.setTextRange(ts.createCall(getHelperName("__spread"), undefined, argumentList), location);
     }
     ts.createSpreadHelper = createSpreadHelper;
-    // Utilities
     function createForOfBindingStatement(node, boundValue) {
         if (ts.isVariableDeclarationList(node)) {
             var firstDeclaration = ts.first(node.declarations);
-            var updatedDeclaration = ts.updateVariableDeclaration(firstDeclaration, firstDeclaration.name, 
-            /*typeNode*/ undefined, boundValue);
-            return ts.setTextRange(ts.createVariableStatement(
-            /*modifiers*/ undefined, ts.updateVariableDeclarationList(node, [updatedDeclaration])), 
-            /*location*/ node);
+            var updatedDeclaration = ts.updateVariableDeclaration(firstDeclaration, firstDeclaration.name, undefined, boundValue);
+            return ts.setTextRange(ts.createVariableStatement(undefined, ts.updateVariableDeclarationList(node, [updatedDeclaration])), node);
         }
         else {
-            var updatedExpression = ts.setTextRange(ts.createAssignment(node, boundValue), /*location*/ node);
-            return ts.setTextRange(ts.createStatement(updatedExpression), /*location*/ node);
+            var updatedExpression = ts.setTextRange(ts.createAssignment(node, boundValue), node);
+            return ts.setTextRange(ts.createStatement(updatedExpression), node);
         }
     }
     ts.createForOfBindingStatement = createForOfBindingStatement;
@@ -58084,7 +48652,7 @@ var ts;
             return ts.updateBlock(dest, ts.setTextRange(ts.createNodeArray([source].concat(dest.statements)), dest.statements));
         }
         else {
-            return ts.createBlock(ts.createNodeArray([dest, source]), /*multiLine*/ true);
+            return ts.createBlock(ts.createNodeArray([dest, source]), true);
         }
     }
     ts.insertLeadingStatement = insertLeadingStatement;
@@ -58092,7 +48660,7 @@ var ts;
         if (!outermostLabeledStatement) {
             return node;
         }
-        var updated = ts.updateLabel(outermostLabeledStatement, outermostLabeledStatement.label, outermostLabeledStatement.statement.kind === 228 /* LabeledStatement */
+        var updated = ts.updateLabel(outermostLabeledStatement, outermostLabeledStatement.label, outermostLabeledStatement.statement.kind === 228
             ? restoreEnclosingLabel(node, outermostLabeledStatement.statement)
             : node);
         if (afterRestoreLabelCallback) {
@@ -58104,19 +48672,19 @@ var ts;
     function shouldBeCapturedInTempVariable(node, cacheIdentifiers) {
         var target = ts.skipParentheses(node);
         switch (target.kind) {
-            case 71 /* Identifier */:
+            case 71:
                 return cacheIdentifiers;
-            case 99 /* ThisKeyword */:
-            case 8 /* NumericLiteral */:
-            case 9 /* StringLiteral */:
+            case 99:
+            case 8:
+            case 9:
                 return false;
-            case 183 /* ArrayLiteralExpression */:
+            case 183:
                 var elements = target.elements;
                 if (elements.length === 0) {
                     return false;
                 }
                 return true;
-            case 184 /* ObjectLiteralExpression */:
+            case 184:
                 return target.properties.length > 0;
             default:
                 return true;
@@ -58124,28 +48692,27 @@ var ts;
     }
     function createCallBinding(expression, recordTempVariable, languageVersion, cacheIdentifiers) {
         if (cacheIdentifiers === void 0) { cacheIdentifiers = false; }
-        var callee = skipOuterExpressions(expression, 7 /* All */);
+        var callee = skipOuterExpressions(expression, 7);
         var thisArg;
         var target;
         if (ts.isSuperProperty(callee)) {
             thisArg = ts.createThis();
             target = callee;
         }
-        else if (callee.kind === 97 /* SuperKeyword */) {
+        else if (callee.kind === 97) {
             thisArg = ts.createThis();
-            target = languageVersion < 2 /* ES2015 */
+            target = languageVersion < 2
                 ? ts.setTextRange(ts.createIdentifier("_super"), callee)
                 : callee;
         }
-        else if (ts.getEmitFlags(callee) & 4096 /* HelperName */) {
+        else if (ts.getEmitFlags(callee) & 4096) {
             thisArg = ts.createVoidZero();
             target = parenthesizeForAccess(callee);
         }
         else {
             switch (callee.kind) {
-                case 185 /* PropertyAccessExpression */: {
+                case 185: {
                     if (shouldBeCapturedInTempVariable(callee.expression, cacheIdentifiers)) {
-                        // for `a.b()` target is `(_a = a).b` and thisArg is `_a`
                         thisArg = ts.createTempVariable(recordTempVariable);
                         target = ts.createPropertyAccess(ts.setTextRange(ts.createAssignment(thisArg, callee.expression), callee.expression), callee.name);
                         ts.setTextRange(target, callee);
@@ -58156,9 +48723,8 @@ var ts;
                     }
                     break;
                 }
-                case 186 /* ElementAccessExpression */: {
+                case 186: {
                     if (shouldBeCapturedInTempVariable(callee.expression, cacheIdentifiers)) {
-                        // for `a[b]()` target is `(_a = a)[b]` and thisArg is `_a`
                         thisArg = ts.createTempVariable(recordTempVariable);
                         target = ts.createElementAccess(ts.setTextRange(ts.createAssignment(thisArg, callee.expression), callee.expression), callee.argumentExpression);
                         ts.setTextRange(target, callee);
@@ -58170,7 +48736,6 @@ var ts;
                     break;
                 }
                 default: {
-                    // for `a()` target is `a` and thisArg is `void 0`
                     thisArg = ts.createVoidZero();
                     target = parenthesizeForAccess(expression);
                     break;
@@ -58181,8 +48746,6 @@ var ts;
     }
     ts.createCallBinding = createCallBinding;
     function inlineExpressions(expressions) {
-        // Avoid deeply nested comma expressions as traversing them during emit can result in "Maximum call
-        // stack size exceeded" errors.
         return expressions.length > 10
             ? ts.createCommaList(expressions)
             : ts.reduceLeft(expressions, ts.createComma);
@@ -58213,14 +48776,14 @@ var ts;
     ts.createExpressionForPropertyName = createExpressionForPropertyName;
     function createExpressionForObjectLiteralElementLike(node, property, receiver) {
         switch (property.kind) {
-            case 156 /* GetAccessor */:
-            case 157 /* SetAccessor */:
+            case 156:
+            case 157:
                 return createExpressionForAccessorDeclaration(node.properties, property, receiver, !!node.multiLine);
-            case 270 /* PropertyAssignment */:
+            case 270:
                 return createExpressionForPropertyAssignment(property, receiver);
-            case 271 /* ShorthandPropertyAssignment */:
+            case 271:
                 return createExpressionForShorthandPropertyAssignment(property, receiver);
-            case 154 /* MethodDeclaration */:
+            case 154:
                 return createExpressionForMethodDeclaration(property, receiver);
         }
     }
@@ -58230,24 +48793,14 @@ var ts;
         if (property === firstAccessor) {
             var properties_9 = [];
             if (getAccessor) {
-                var getterFunction = ts.createFunctionExpression(getAccessor.modifiers, 
-                /*asteriskToken*/ undefined, 
-                /*name*/ undefined, 
-                /*typeParameters*/ undefined, getAccessor.parameters, 
-                /*type*/ undefined, getAccessor.body // TODO: GH#18217
-                );
+                var getterFunction = ts.createFunctionExpression(getAccessor.modifiers, undefined, undefined, undefined, getAccessor.parameters, undefined, getAccessor.body);
                 ts.setTextRange(getterFunction, getAccessor);
                 ts.setOriginalNode(getterFunction, getAccessor);
                 var getter = ts.createPropertyAssignment("get", getterFunction);
                 properties_9.push(getter);
             }
             if (setAccessor) {
-                var setterFunction = ts.createFunctionExpression(setAccessor.modifiers, 
-                /*asteriskToken*/ undefined, 
-                /*name*/ undefined, 
-                /*typeParameters*/ undefined, setAccessor.parameters, 
-                /*type*/ undefined, setAccessor.body // TODO: GH#18217
-                );
+                var setterFunction = ts.createFunctionExpression(setAccessor.modifiers, undefined, undefined, undefined, setAccessor.parameters, undefined, setAccessor.body);
                 ts.setTextRange(setterFunction, setAccessor);
                 ts.setOriginalNode(setterFunction, setAccessor);
                 var setter = ts.createPropertyAssignment("set", setterFunction);
@@ -58255,108 +48808,48 @@ var ts;
             }
             properties_9.push(ts.createPropertyAssignment("enumerable", ts.createTrue()));
             properties_9.push(ts.createPropertyAssignment("configurable", ts.createTrue()));
-            var expression = ts.setTextRange(ts.createCall(ts.createPropertyAccess(ts.createIdentifier("Object"), "defineProperty"), 
-            /*typeArguments*/ undefined, [
+            var expression = ts.setTextRange(ts.createCall(ts.createPropertyAccess(ts.createIdentifier("Object"), "defineProperty"), undefined, [
                 receiver,
                 createExpressionForPropertyName(property.name),
                 ts.createObjectLiteral(properties_9, multiLine)
-            ]), 
-            /*location*/ firstAccessor);
+            ]), firstAccessor);
             return ts.aggregateTransformFlags(expression);
         }
         return undefined;
     }
     function createExpressionForPropertyAssignment(property, receiver) {
-        return ts.aggregateTransformFlags(ts.setOriginalNode(ts.setTextRange(ts.createAssignment(createMemberAccessForPropertyName(receiver, property.name, /*location*/ property.name), property.initializer), property), property));
+        return ts.aggregateTransformFlags(ts.setOriginalNode(ts.setTextRange(ts.createAssignment(createMemberAccessForPropertyName(receiver, property.name, property.name), property.initializer), property), property));
     }
     function createExpressionForShorthandPropertyAssignment(property, receiver) {
-        return ts.aggregateTransformFlags(ts.setOriginalNode(ts.setTextRange(ts.createAssignment(createMemberAccessForPropertyName(receiver, property.name, /*location*/ property.name), ts.getSynthesizedClone(property.name)), 
-        /*location*/ property), 
-        /*original*/ property));
+        return ts.aggregateTransformFlags(ts.setOriginalNode(ts.setTextRange(ts.createAssignment(createMemberAccessForPropertyName(receiver, property.name, property.name), ts.getSynthesizedClone(property.name)), property), property));
     }
     function createExpressionForMethodDeclaration(method, receiver) {
-        return ts.aggregateTransformFlags(ts.setOriginalNode(ts.setTextRange(ts.createAssignment(createMemberAccessForPropertyName(receiver, method.name, /*location*/ method.name), ts.setOriginalNode(ts.setTextRange(ts.createFunctionExpression(method.modifiers, method.asteriskToken, 
-        /*name*/ undefined, 
-        /*typeParameters*/ undefined, method.parameters, 
-        /*type*/ undefined, method.body // TODO: GH#18217
-        ), 
-        /*location*/ method), 
-        /*original*/ method)), 
-        /*location*/ method), 
-        /*original*/ method));
-    }
-    /**
-     * Gets the internal name of a declaration. This is primarily used for declarations that can be
-     * referred to by name in the body of an ES5 class function body. An internal name will *never*
-     * be prefixed with an module or namespace export modifier like "exports." when emitted as an
-     * expression. An internal name will also *never* be renamed due to a collision with a block
-     * scoped variable.
-     *
-     * @param node The declaration.
-     * @param allowComments A value indicating whether comments may be emitted for the name.
-     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
-     */
+        return ts.aggregateTransformFlags(ts.setOriginalNode(ts.setTextRange(ts.createAssignment(createMemberAccessForPropertyName(receiver, method.name, method.name), ts.setOriginalNode(ts.setTextRange(ts.createFunctionExpression(method.modifiers, method.asteriskToken, undefined, undefined, method.parameters, undefined, method.body), method), method)), method), method));
+    }
     function getInternalName(node, allowComments, allowSourceMaps) {
-        return getName(node, allowComments, allowSourceMaps, 16384 /* LocalName */ | 32768 /* InternalName */);
+        return getName(node, allowComments, allowSourceMaps, 16384 | 32768);
     }
     ts.getInternalName = getInternalName;
-    /**
-     * Gets whether an identifier should only be referred to by its internal name.
-     */
     function isInternalName(node) {
-        return (ts.getEmitFlags(node) & 32768 /* InternalName */) !== 0;
+        return (ts.getEmitFlags(node) & 32768) !== 0;
     }
     ts.isInternalName = isInternalName;
-    /**
-     * Gets the local name of a declaration. This is primarily used for declarations that can be
-     * referred to by name in the declaration's immediate scope (classes, enums, namespaces). A
-     * local name will *never* be prefixed with an module or namespace export modifier like
-     * "exports." when emitted as an expression.
-     *
-     * @param node The declaration.
-     * @param allowComments A value indicating whether comments may be emitted for the name.
-     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
-     */
     function getLocalName(node, allowComments, allowSourceMaps) {
-        return getName(node, allowComments, allowSourceMaps, 16384 /* LocalName */);
+        return getName(node, allowComments, allowSourceMaps, 16384);
     }
     ts.getLocalName = getLocalName;
-    /**
-     * Gets whether an identifier should only be referred to by its local name.
-     */
     function isLocalName(node) {
-        return (ts.getEmitFlags(node) & 16384 /* LocalName */) !== 0;
+        return (ts.getEmitFlags(node) & 16384) !== 0;
     }
     ts.isLocalName = isLocalName;
-    /**
-     * Gets the export name of a declaration. This is primarily used for declarations that can be
-     * referred to by name in the declaration's immediate scope (classes, enums, namespaces). An
-     * export name will *always* be prefixed with an module or namespace export modifier like
-     * `"exports."` when emitted as an expression if the name points to an exported symbol.
-     *
-     * @param node The declaration.
-     * @param allowComments A value indicating whether comments may be emitted for the name.
-     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
-     */
     function getExportName(node, allowComments, allowSourceMaps) {
-        return getName(node, allowComments, allowSourceMaps, 8192 /* ExportName */);
+        return getName(node, allowComments, allowSourceMaps, 8192);
     }
     ts.getExportName = getExportName;
-    /**
-     * Gets whether an identifier should only be referred to by its export representation if the
-     * name points to an exported symbol.
-     */
     function isExportName(node) {
-        return (ts.getEmitFlags(node) & 8192 /* ExportName */) !== 0;
+        return (ts.getEmitFlags(node) & 8192) !== 0;
     }
     ts.isExportName = isExportName;
-    /**
-     * Gets the name of a declaration for use in declarations.
-     *
-     * @param node The declaration.
-     * @param allowComments A value indicating whether comments may be emitted for the name.
-     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
-     */
     function getDeclarationName(node, allowComments, allowSourceMaps) {
         return getName(node, allowComments, allowSourceMaps);
     }
@@ -58368,49 +48861,30 @@ var ts;
             var name = ts.getMutableClone(nodeName);
             emitFlags |= ts.getEmitFlags(nodeName);
             if (!allowSourceMaps)
-                emitFlags |= 48 /* NoSourceMap */;
+                emitFlags |= 48;
             if (!allowComments)
-                emitFlags |= 1536 /* NoComments */;
+                emitFlags |= 1536;
             if (emitFlags)
                 ts.setEmitFlags(name, emitFlags);
             return name;
         }
         return ts.getGeneratedNameForNode(node);
     }
-    /**
-     * Gets the exported name of a declaration for use in expressions.
-     *
-     * An exported name will *always* be prefixed with an module or namespace export modifier like
-     * "exports." if the name points to an exported symbol.
-     *
-     * @param ns The namespace identifier.
-     * @param node The declaration.
-     * @param allowComments A value indicating whether comments may be emitted for the name.
-     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
-     */
     function getExternalModuleOrNamespaceExportName(ns, node, allowComments, allowSourceMaps) {
-        if (ns && ts.hasModifier(node, 1 /* Export */)) {
+        if (ns && ts.hasModifier(node, 1)) {
             return getNamespaceMemberName(ns, getName(node), allowComments, allowSourceMaps);
         }
         return getExportName(node, allowComments, allowSourceMaps);
     }
     ts.getExternalModuleOrNamespaceExportName = getExternalModuleOrNamespaceExportName;
-    /**
-     * Gets a namespace-qualified name for use in expressions.
-     *
-     * @param ns The namespace identifier.
-     * @param name The name.
-     * @param allowComments A value indicating whether comments may be emitted for the name.
-     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
-     */
     function getNamespaceMemberName(ns, name, allowComments, allowSourceMaps) {
         var qualifiedName = ts.createPropertyAccess(ns, ts.nodeIsSynthesized(name) ? name : ts.getSynthesizedClone(name));
         ts.setTextRange(qualifiedName, name);
         var emitFlags = 0;
         if (!allowSourceMaps)
-            emitFlags |= 48 /* NoSourceMap */;
+            emitFlags |= 48;
         if (!allowComments)
-            emitFlags |= 1536 /* NoComments */;
+            emitFlags |= 1536;
         if (emitFlags)
             ts.setEmitFlags(qualifiedName, emitFlags);
         return qualifiedName;
@@ -58427,7 +48901,7 @@ var ts;
         ts.setOriginalNode(updated, node);
         ts.setTextRange(updated, node);
         if (ts.getStartsOnNewLine(node)) {
-            ts.setStartsOnNewLine(updated, /*newLine*/ true);
+            ts.setStartsOnNewLine(updated, true);
         }
         ts.aggregateTransformFlags(updated);
         return updated;
@@ -58436,28 +48910,11 @@ var ts;
     function isUseStrictPrologue(node) {
         return ts.isStringLiteral(node.expression) && node.expression.text === "use strict";
     }
-    /**
-     * Add any necessary prologue-directives into target statement-array.
-     * The function needs to be called during each transformation step.
-     * This function needs to be called whenever we transform the statement
-     * list of a source file, namespace, or function-like body.
-     *
-     * @param target: result statements array
-     * @param source: origin statements array
-     * @param ensureUseStrict: boolean determining whether the function need to add prologue-directives
-     * @param visitor: Optional callback used to visit any custom prologue directives.
-     */
     function addPrologue(target, source, ensureUseStrict, visitor) {
         var offset = addStandardPrologue(target, source, ensureUseStrict);
         return addCustomPrologue(target, source, offset, visitor);
     }
     ts.addPrologue = addPrologue;
-    /**
-     * Add just the standard (string-expression) prologue-directives into target statement-array.
-     * The function needs to be called during each transformation step.
-     * This function needs to be called whenever we transform the statement
-     * list of a source file, namespace, or function-like body.
-     */
     function addStandardPrologue(target, source, ensureUseStrict) {
         ts.Debug.assert(target.length === 0, "Prologue directives should be at the first statement in the target statements array");
         var foundUseStrict = false;
@@ -58486,7 +48943,7 @@ var ts;
         var numStatements = source.length;
         while (statementOffset !== undefined && statementOffset < numStatements) {
             var statement = source[statementOffset];
-            if (ts.getEmitFlags(statement) & 1048576 /* CustomPrologue */) {
+            if (ts.getEmitFlags(statement) & 1048576) {
                 ts.append(target, visitor ? ts.visitNode(statement, visitor, ts.isStatement) : statement);
             }
             else {
@@ -58504,11 +48961,6 @@ var ts;
             && isUseStrictPrologue(firstStatement);
     }
     ts.startsWithUseStrict = startsWithUseStrict;
-    /**
-     * Ensures "use strict" directive is added
-     *
-     * @param statements An array of statements
-     */
     function ensureUseStrict(statements) {
         var foundUseStrict = false;
         for (var _i = 0, statements_3 = statements; _i < statements_3.length; _i++) {
@@ -58531,19 +48983,9 @@ var ts;
         return statements;
     }
     ts.ensureUseStrict = ensureUseStrict;
-    /**
-     * Wraps the operand to a BinaryExpression in parentheses if they are needed to preserve the intended
-     * order of operations.
-     *
-     * @param binaryOperator The operator for the BinaryExpression.
-     * @param operand The operand for the BinaryExpression.
-     * @param isLeftSideOfBinary A value indicating whether the operand is the left side of the
-     *                           BinaryExpression.
-     */
     function parenthesizeBinaryOperand(binaryOperator, operand, isLeftSideOfBinary, leftOperand) {
         var skipped = ts.skipPartiallyEmittedExpressions(operand);
-        // If the resulting expression is already parenthesized, we do not need to do any further processing.
-        if (skipped.kind === 191 /* ParenthesizedExpression */) {
+        if (skipped.kind === 191) {
             return operand;
         }
         return binaryOperandNeedsParentheses(binaryOperator, operand, isLeftSideOfBinary, leftOperand)
@@ -58551,131 +48993,55 @@ var ts;
             : operand;
     }
     ts.parenthesizeBinaryOperand = parenthesizeBinaryOperand;
-    /**
-     * Determines whether the operand to a BinaryExpression needs to be parenthesized.
-     *
-     * @param binaryOperator The operator for the BinaryExpression.
-     * @param operand The operand for the BinaryExpression.
-     * @param isLeftSideOfBinary A value indicating whether the operand is the left side of the
-     *                           BinaryExpression.
-     */
     function binaryOperandNeedsParentheses(binaryOperator, operand, isLeftSideOfBinary, leftOperand) {
-        // If the operand has lower precedence, then it needs to be parenthesized to preserve the
-        // intent of the expression. For example, if the operand is `a + b` and the operator is
-        // `*`, then we need to parenthesize the operand to preserve the intended order of
-        // operations: `(a + b) * x`.
-        //
-        // If the operand has higher precedence, then it does not need to be parenthesized. For
-        // example, if the operand is `a * b` and the operator is `+`, then we do not need to
-        // parenthesize to preserve the intended order of operations: `a * b + x`.
-        //
-        // If the operand has the same precedence, then we need to check the associativity of
-        // the operator based on whether this is the left or right operand of the expression.
-        //
-        // For example, if `a / d` is on the right of operator `*`, we need to parenthesize
-        // to preserve the intended order of operations: `x * (a / d)`
-        //
-        // If `a ** d` is on the left of operator `**`, we need to parenthesize to preserve
-        // the intended order of operations: `(a ** b) ** c`
-        var binaryOperatorPrecedence = ts.getOperatorPrecedence(200 /* BinaryExpression */, binaryOperator);
-        var binaryOperatorAssociativity = ts.getOperatorAssociativity(200 /* BinaryExpression */, binaryOperator);
+        var binaryOperatorPrecedence = ts.getOperatorPrecedence(200, binaryOperator);
+        var binaryOperatorAssociativity = ts.getOperatorAssociativity(200, binaryOperator);
         var emittedOperand = ts.skipPartiallyEmittedExpressions(operand);
         var operandPrecedence = ts.getExpressionPrecedence(emittedOperand);
         switch (ts.compareValues(operandPrecedence, binaryOperatorPrecedence)) {
-            case -1 /* LessThan */:
-                // If the operand is the right side of a right-associative binary operation
-                // and is a yield expression, then we do not need parentheses.
+            case -1:
                 if (!isLeftSideOfBinary
-                    && binaryOperatorAssociativity === 1 /* Right */
-                    && operand.kind === 203 /* YieldExpression */) {
+                    && binaryOperatorAssociativity === 1
+                    && operand.kind === 203) {
                     return false;
                 }
                 return true;
-            case 1 /* GreaterThan */:
+            case 1:
                 return false;
-            case 0 /* EqualTo */:
+            case 0:
                 if (isLeftSideOfBinary) {
-                    // No need to parenthesize the left operand when the binary operator is
-                    // left associative:
-                    //  (a*b)/x    -> a*b/x
-                    //  (a**b)/x   -> a**b/x
-                    //
-                    // Parentheses are needed for the left operand when the binary operator is
-                    // right associative:
-                    //  (a/b)**x   -> (a/b)**x
-                    //  (a**b)**x  -> (a**b)**x
-                    return binaryOperatorAssociativity === 1 /* Right */;
+                    return binaryOperatorAssociativity === 1;
                 }
                 else {
                     if (ts.isBinaryExpression(emittedOperand)
                         && emittedOperand.operatorToken.kind === binaryOperator) {
-                        // No need to parenthesize the right operand when the binary operator and
-                        // operand are the same and one of the following:
-                        //  x*(a*b)     => x*a*b
-                        //  x|(a|b)     => x|a|b
-                        //  x&(a&b)     => x&a&b
-                        //  x^(a^b)     => x^a^b
                         if (operatorHasAssociativeProperty(binaryOperator)) {
                             return false;
                         }
-                        // No need to parenthesize the right operand when the binary operator
-                        // is plus (+) if both the left and right operands consist solely of either
-                        // literals of the same kind or binary plus (+) expressions for literals of
-                        // the same kind (recursively).
-                        //  "a"+(1+2)       => "a"+(1+2)
-                        //  "a"+("b"+"c")   => "a"+"b"+"c"
-                        if (binaryOperator === 37 /* PlusToken */) {
-                            var leftKind = leftOperand ? getLiteralKindOfBinaryPlusOperand(leftOperand) : 0 /* Unknown */;
+                        if (binaryOperator === 37) {
+                            var leftKind = leftOperand ? getLiteralKindOfBinaryPlusOperand(leftOperand) : 0;
                             if (ts.isLiteralKind(leftKind) && leftKind === getLiteralKindOfBinaryPlusOperand(emittedOperand)) {
                                 return false;
                             }
                         }
                     }
-                    // No need to parenthesize the right operand when the operand is right
-                    // associative:
-                    //  x/(a**b)    -> x/a**b
-                    //  x**(a**b)   -> x**a**b
-                    //
-                    // Parentheses are needed for the right operand when the operand is left
-                    // associative:
-                    //  x/(a*b)     -> x/(a*b)
-                    //  x**(a/b)    -> x**(a/b)
                     var operandAssociativity = ts.getExpressionAssociativity(emittedOperand);
-                    return operandAssociativity === 0 /* Left */;
+                    return operandAssociativity === 0;
                 }
         }
     }
-    /**
-     * Determines whether a binary operator is mathematically associative.
-     *
-     * @param binaryOperator The binary operator.
-     */
     function operatorHasAssociativeProperty(binaryOperator) {
-        // The following operators are associative in JavaScript:
-        //  (a*b)*c     -> a*(b*c)  -> a*b*c
-        //  (a|b)|c     -> a|(b|c)  -> a|b|c
-        //  (a&b)&c     -> a&(b&c)  -> a&b&c
-        //  (a^b)^c     -> a^(b^c)  -> a^b^c
-        //
-        // While addition is associative in mathematics, JavaScript's `+` is not
-        // guaranteed to be associative as it is overloaded with string concatenation.
-        return binaryOperator === 39 /* AsteriskToken */
-            || binaryOperator === 49 /* BarToken */
-            || binaryOperator === 48 /* AmpersandToken */
-            || binaryOperator === 50 /* CaretToken */;
-    }
-    /**
-     * This function determines whether an expression consists of a homogeneous set of
-     * literal expressions or binary plus expressions that all share the same literal kind.
-     * It is used to determine whether the right-hand operand of a binary plus expression can be
-     * emitted without parentheses.
-     */
+        return binaryOperator === 39
+            || binaryOperator === 49
+            || binaryOperator === 48
+            || binaryOperator === 50;
+    }
     function getLiteralKindOfBinaryPlusOperand(node) {
         node = ts.skipPartiallyEmittedExpressions(node);
         if (ts.isLiteralKind(node.kind)) {
             return node.kind;
         }
-        if (node.kind === 200 /* BinaryExpression */ && node.operatorToken.kind === 37 /* PlusToken */) {
+        if (node.kind === 200 && node.operatorToken.kind === 37) {
             if (node.cachedLiteralKind !== undefined) {
                 return node.cachedLiteralKind;
             }
@@ -58683,66 +49049,46 @@ var ts;
             var literalKind = ts.isLiteralKind(leftKind)
                 && leftKind === getLiteralKindOfBinaryPlusOperand(node.right)
                 ? leftKind
-                : 0 /* Unknown */;
+                : 0;
             node.cachedLiteralKind = literalKind;
             return literalKind;
         }
-        return 0 /* Unknown */;
+        return 0;
     }
     function parenthesizeForConditionalHead(condition) {
-        var conditionalPrecedence = ts.getOperatorPrecedence(201 /* ConditionalExpression */, 55 /* QuestionToken */);
+        var conditionalPrecedence = ts.getOperatorPrecedence(201, 55);
         var emittedCondition = ts.skipPartiallyEmittedExpressions(condition);
         var conditionPrecedence = ts.getExpressionPrecedence(emittedCondition);
-        if (ts.compareValues(conditionPrecedence, conditionalPrecedence) === -1 /* LessThan */) {
+        if (ts.compareValues(conditionPrecedence, conditionalPrecedence) === -1) {
             return ts.createParen(condition);
         }
         return condition;
     }
     ts.parenthesizeForConditionalHead = parenthesizeForConditionalHead;
     function parenthesizeSubexpressionOfConditionalExpression(e) {
-        // per ES grammar both 'whenTrue' and 'whenFalse' parts of conditional expression are assignment expressions
-        // so in case when comma expression is introduced as a part of previous transformations
-        // if should be wrapped in parens since comma operator has the lowest precedence
         var emittedExpression = ts.skipPartiallyEmittedExpressions(e);
-        return emittedExpression.kind === 200 /* BinaryExpression */ && emittedExpression.operatorToken.kind === 26 /* CommaToken */ ||
-            emittedExpression.kind === 302 /* CommaListExpression */
+        return emittedExpression.kind === 200 && emittedExpression.operatorToken.kind === 26 ||
+            emittedExpression.kind === 302
             ? ts.createParen(e)
             : e;
     }
     ts.parenthesizeSubexpressionOfConditionalExpression = parenthesizeSubexpressionOfConditionalExpression;
-    /**
-     *  [Per the spec](https://tc39.github.io/ecma262/#prod-ExportDeclaration), `export default` accepts _AssigmentExpression_ but
-     *  has a lookahead restriction for `function`, `async function`, and `class`.
-     *
-     * Basically, that means we need to parenthesize in the following cases:
-     *
-     * - BinaryExpression of CommaToken
-     * - CommaList (synthetic list of multiple comma expressions)
-     * - FunctionExpression
-     * - ClassExpression
-     */
     function parenthesizeDefaultExpression(e) {
         var check = ts.skipPartiallyEmittedExpressions(e);
-        return (check.kind === 205 /* ClassExpression */ ||
-            check.kind === 192 /* FunctionExpression */ ||
-            check.kind === 302 /* CommaListExpression */ ||
-            ts.isBinaryExpression(check) && check.operatorToken.kind === 26 /* CommaToken */)
+        return (check.kind === 205 ||
+            check.kind === 192 ||
+            check.kind === 302 ||
+            ts.isBinaryExpression(check) && check.operatorToken.kind === 26)
             ? ts.createParen(e)
             : e;
     }
     ts.parenthesizeDefaultExpression = parenthesizeDefaultExpression;
-    /**
-     * Wraps an expression in parentheses if it is needed in order to use the expression
-     * as the expression of a NewExpression node.
-     *
-     * @param expression The Expression node.
-     */
     function parenthesizeForNew(expression) {
-        var leftmostExpr = getLeftmostExpression(expression, /*stopAtCallExpressions*/ true);
+        var leftmostExpr = getLeftmostExpression(expression, true);
         switch (leftmostExpr.kind) {
-            case 187 /* CallExpression */:
+            case 187:
                 return ts.createParen(expression);
-            case 188 /* NewExpression */:
+            case 188:
                 return !leftmostExpr.arguments
                     ? ts.createParen(expression)
                     : expression;
@@ -58750,22 +49096,10 @@ var ts;
         return parenthesizeForAccess(expression);
     }
     ts.parenthesizeForNew = parenthesizeForNew;
-    /**
-     * Wraps an expression in parentheses if it is needed in order to use the expression for
-     * property or element access.
-     *
-     * @param expr The expression node.
-     */
     function parenthesizeForAccess(expression) {
-        // isLeftHandSideExpression is almost the correct criterion for when it is not necessary
-        // to parenthesize the expression before a dot. The known exception is:
-        //
-        //    NewExpression:
-        //       new C.x        -> not the same as (new C).x
-        //
         var emittedExpression = ts.skipPartiallyEmittedExpressions(expression);
         if (ts.isLeftHandSideExpression(emittedExpression)
-            && (emittedExpression.kind !== 188 /* NewExpression */ || emittedExpression.arguments)) {
+            && (emittedExpression.kind !== 188 || emittedExpression.arguments)) {
             return expression;
         }
         return ts.setTextRange(ts.createParen(expression), expression);
@@ -58803,7 +49137,7 @@ var ts;
     function parenthesizeExpressionForList(expression) {
         var emittedExpression = ts.skipPartiallyEmittedExpressions(expression);
         var expressionPrecedence = ts.getExpressionPrecedence(emittedExpression);
-        var commaPrecedence = ts.getOperatorPrecedence(200 /* BinaryExpression */, 26 /* CommaToken */);
+        var commaPrecedence = ts.getOperatorPrecedence(200, 26);
         return expressionPrecedence > commaPrecedence
             ? expression
             : ts.setTextRange(ts.createParen(expression), expression);
@@ -58814,29 +49148,29 @@ var ts;
         if (ts.isCallExpression(emittedExpression)) {
             var callee = emittedExpression.expression;
             var kind = ts.skipPartiallyEmittedExpressions(callee).kind;
-            if (kind === 192 /* FunctionExpression */ || kind === 193 /* ArrowFunction */) {
+            if (kind === 192 || kind === 193) {
                 var mutableCall = ts.getMutableClone(emittedExpression);
                 mutableCall.expression = ts.setTextRange(ts.createParen(callee), callee);
-                return recreateOuterExpressions(expression, mutableCall, 4 /* PartiallyEmittedExpressions */);
+                return recreateOuterExpressions(expression, mutableCall, 4);
             }
         }
-        var leftmostExpressionKind = getLeftmostExpression(emittedExpression, /*stopAtCallExpressions*/ false).kind;
-        if (leftmostExpressionKind === 184 /* ObjectLiteralExpression */ || leftmostExpressionKind === 192 /* FunctionExpression */) {
+        var leftmostExpressionKind = getLeftmostExpression(emittedExpression, false).kind;
+        if (leftmostExpressionKind === 184 || leftmostExpressionKind === 192) {
             return ts.setTextRange(ts.createParen(expression), expression);
         }
         return expression;
     }
     ts.parenthesizeExpressionForExpressionStatement = parenthesizeExpressionForExpressionStatement;
     function parenthesizeConditionalTypeMember(member) {
-        return member.kind === 171 /* ConditionalType */ ? ts.createParenthesizedType(member) : member;
+        return member.kind === 171 ? ts.createParenthesizedType(member) : member;
     }
     ts.parenthesizeConditionalTypeMember = parenthesizeConditionalTypeMember;
     function parenthesizeElementTypeMember(member) {
         switch (member.kind) {
-            case 169 /* UnionType */:
-            case 170 /* IntersectionType */:
-            case 163 /* FunctionType */:
-            case 164 /* ConstructorType */:
+            case 169:
+            case 170:
+            case 163:
+            case 164:
                 return ts.createParenthesizedType(member);
         }
         return parenthesizeConditionalTypeMember(member);
@@ -58844,9 +49178,9 @@ var ts;
     ts.parenthesizeElementTypeMember = parenthesizeElementTypeMember;
     function parenthesizeArrayTypeMember(member) {
         switch (member.kind) {
-            case 165 /* TypeQuery */:
-            case 175 /* TypeOperator */:
-            case 172 /* InferType */:
+            case 165:
+            case 175:
+            case 172:
                 return ts.createParenthesizedType(member);
         }
         return parenthesizeElementTypeMember(member);
@@ -58872,25 +49206,24 @@ var ts;
     function getLeftmostExpression(node, stopAtCallExpressions) {
         while (true) {
             switch (node.kind) {
-                case 199 /* PostfixUnaryExpression */:
+                case 199:
                     node = node.operand;
                     continue;
-                case 200 /* BinaryExpression */:
+                case 200:
                     node = node.left;
                     continue;
-                case 201 /* ConditionalExpression */:
+                case 201:
                     node = node.condition;
                     continue;
-                case 187 /* CallExpression */:
+                case 187:
                     if (stopAtCallExpressions) {
                         return node;
                     }
-                // falls through
-                case 186 /* ElementAccessExpression */:
-                case 185 /* PropertyAccessExpression */:
+                case 186:
+                case 185:
                     node = node.expression;
                     continue;
-                case 301 /* PartiallyEmittedExpression */:
+                case 301:
                     node = node.expression;
                     continue;
             }
@@ -58898,46 +49231,39 @@ var ts;
         }
     }
     function parenthesizeConciseBody(body) {
-        if (!ts.isBlock(body) && getLeftmostExpression(body, /*stopAtCallExpressions*/ false).kind === 184 /* ObjectLiteralExpression */) {
+        if (!ts.isBlock(body) && getLeftmostExpression(body, false).kind === 184) {
             return ts.setTextRange(ts.createParen(body), body);
         }
         return body;
     }
     ts.parenthesizeConciseBody = parenthesizeConciseBody;
-    var OuterExpressionKinds;
-    (function (OuterExpressionKinds) {
-        OuterExpressionKinds[OuterExpressionKinds["Parentheses"] = 1] = "Parentheses";
-        OuterExpressionKinds[OuterExpressionKinds["Assertions"] = 2] = "Assertions";
-        OuterExpressionKinds[OuterExpressionKinds["PartiallyEmittedExpressions"] = 4] = "PartiallyEmittedExpressions";
-        OuterExpressionKinds[OuterExpressionKinds["All"] = 7] = "All";
-    })(OuterExpressionKinds = ts.OuterExpressionKinds || (ts.OuterExpressionKinds = {}));
     function isOuterExpression(node, kinds) {
-        if (kinds === void 0) { kinds = 7 /* All */; }
+        if (kinds === void 0) { kinds = 7; }
         switch (node.kind) {
-            case 191 /* ParenthesizedExpression */:
-                return (kinds & 1 /* Parentheses */) !== 0;
-            case 190 /* TypeAssertionExpression */:
-            case 208 /* AsExpression */:
-            case 209 /* NonNullExpression */:
-                return (kinds & 2 /* Assertions */) !== 0;
-            case 301 /* PartiallyEmittedExpression */:
-                return (kinds & 4 /* PartiallyEmittedExpressions */) !== 0;
+            case 191:
+                return (kinds & 1) !== 0;
+            case 190:
+            case 208:
+            case 209:
+                return (kinds & 2) !== 0;
+            case 301:
+                return (kinds & 4) !== 0;
         }
         return false;
     }
     ts.isOuterExpression = isOuterExpression;
     function skipOuterExpressions(node, kinds) {
-        if (kinds === void 0) { kinds = 7 /* All */; }
+        if (kinds === void 0) { kinds = 7; }
         var previousNode;
         do {
             previousNode = node;
-            if (kinds & 1 /* Parentheses */) {
+            if (kinds & 1) {
                 node = ts.skipParentheses(node);
             }
-            if (kinds & 2 /* Assertions */) {
+            if (kinds & 2) {
                 node = skipAssertions(node);
             }
-            if (kinds & 4 /* PartiallyEmittedExpressions */) {
+            if (kinds & 4) {
                 node = ts.skipPartiallyEmittedExpressions(node);
             }
         } while (previousNode !== node);
@@ -58945,7 +49271,7 @@ var ts;
     }
     ts.skipOuterExpressions = skipOuterExpressions;
     function skipAssertions(node) {
-        while (ts.isAssertionExpression(node) || node.kind === 209 /* NonNullExpression */) {
+        while (ts.isAssertionExpression(node) || node.kind === 209) {
             node = node.expression;
         }
         return node;
@@ -58953,29 +49279,15 @@ var ts;
     ts.skipAssertions = skipAssertions;
     function updateOuterExpression(outerExpression, expression) {
         switch (outerExpression.kind) {
-            case 191 /* ParenthesizedExpression */: return ts.updateParen(outerExpression, expression);
-            case 190 /* TypeAssertionExpression */: return ts.updateTypeAssertion(outerExpression, outerExpression.type, expression);
-            case 208 /* AsExpression */: return ts.updateAsExpression(outerExpression, expression, outerExpression.type);
-            case 209 /* NonNullExpression */: return ts.updateNonNullExpression(outerExpression, expression);
-            case 301 /* PartiallyEmittedExpression */: return ts.updatePartiallyEmittedExpression(outerExpression, expression);
-        }
-    }
-    /**
-     * Determines whether a node is a parenthesized expression that can be ignored when recreating outer expressions.
-     *
-     * A parenthesized expression can be ignored when all of the following are true:
-     *
-     * - It's `pos` and `end` are not -1
-     * - It does not have a custom source map range
-     * - It does not have a custom comment range
-     * - It does not have synthetic leading or trailing comments
-     *
-     * If an outermost parenthesized expression is ignored, but the containing expression requires a parentheses around
-     * the expression to maintain precedence, a new parenthesized expression should be created automatically when
-     * the containing expression is created/updated.
-     */
+            case 191: return ts.updateParen(outerExpression, expression);
+            case 190: return ts.updateTypeAssertion(outerExpression, outerExpression.type, expression);
+            case 208: return ts.updateAsExpression(outerExpression, expression, outerExpression.type);
+            case 209: return ts.updateNonNullExpression(outerExpression, expression);
+            case 301: return ts.updatePartiallyEmittedExpression(outerExpression, expression);
+        }
+    }
     function isIgnorableParen(node) {
-        return node.kind === 191 /* ParenthesizedExpression */
+        return node.kind === 191
             && ts.nodeIsSynthesized(node)
             && ts.nodeIsSynthesized(ts.getSourceMapRange(node))
             && ts.nodeIsSynthesized(ts.getCommentRange(node))
@@ -58983,7 +49295,7 @@ var ts;
             && !ts.some(ts.getSyntheticTrailingComments(node));
     }
     function recreateOuterExpressions(outerExpression, innerExpression, kinds) {
-        if (kinds === void 0) { kinds = 7 /* All */; }
+        if (kinds === void 0) { kinds = 7; }
         if (outerExpression && isOuterExpression(outerExpression, kinds) && !isIgnorableParen(outerExpression)) {
             return updateOuterExpression(outerExpression, recreateOuterExpressions(outerExpression.expression, innerExpression));
         }
@@ -58991,7 +49303,7 @@ var ts;
     }
     ts.recreateOuterExpressions = recreateOuterExpressions;
     function startOnNewLine(node) {
-        return ts.setStartsOnNewLine(node, /*newLine*/ true);
+        return ts.setStartsOnNewLine(node, true);
     }
     ts.startOnNewLine = startOnNewLine;
     function getExternalHelpersModuleName(node) {
@@ -59031,35 +49343,24 @@ var ts;
         }
     }
     ts.getOrCreateExternalHelpersModuleNameIfNeeded = getOrCreateExternalHelpersModuleNameIfNeeded;
-    /**
-     * Get the name of that target module from an import or export declaration
-     */
     function getLocalNameForExternalImport(node, sourceFile) {
         var namespaceDeclaration = ts.getNamespaceDeclarationNode(node);
         if (namespaceDeclaration && !ts.isDefaultImport(node)) {
             var name = namespaceDeclaration.name;
             return ts.isGeneratedIdentifier(name) ? name : ts.createIdentifier(ts.getSourceTextOfNodeFromSourceFile(sourceFile, name) || ts.idText(name));
         }
-        if (node.kind === 244 /* ImportDeclaration */ && node.importClause) {
+        if (node.kind === 244 && node.importClause) {
             return ts.getGeneratedNameForNode(node);
         }
-        if (node.kind === 250 /* ExportDeclaration */ && node.moduleSpecifier) {
+        if (node.kind === 250 && node.moduleSpecifier) {
             return ts.getGeneratedNameForNode(node);
         }
         return undefined;
     }
     ts.getLocalNameForExternalImport = getLocalNameForExternalImport;
-    /**
-     * Get the name of a target module from an import/export declaration as should be written in the emitted output.
-     * The emitted output name can be different from the input if:
-     *  1. The module has a /// <amd-module name="<new name>" />
-     *  2. --out or --outFile is used, making the name relative to the rootDir
-     *  3- The containing SourceFile has an entry in renamedDependencies for the import as requested by some module loaders (e.g. System).
-     * Otherwise, a new StringLiteral node representing the module name will be returned.
-     */
     function getExternalModuleNameLiteral(importNode, sourceFile, host, resolver, compilerOptions) {
-        var moduleName = ts.getExternalModuleName(importNode); // TODO: GH#18217
-        if (moduleName.kind === 9 /* StringLiteral */) {
+        var moduleName = ts.getExternalModuleName(importNode);
+        if (moduleName.kind === 9) {
             return tryGetModuleNameFromDeclaration(importNode, host, resolver, compilerOptions)
                 || tryRenameExternalModule(moduleName, sourceFile)
                 || ts.getSynthesizedClone(moduleName);
@@ -59067,21 +49368,10 @@ var ts;
         return undefined;
     }
     ts.getExternalModuleNameLiteral = getExternalModuleNameLiteral;
-    /**
-     * Some bundlers (SystemJS builder) sometimes want to rename dependencies.
-     * Here we check if alternative name was provided for a given moduleName and return it if possible.
-     */
     function tryRenameExternalModule(moduleName, sourceFile) {
         var rename = sourceFile.renamedDependencies && sourceFile.renamedDependencies.get(moduleName.text);
         return rename && ts.createLiteral(rename);
     }
-    /**
-     * Get the name of a module as should be written in the emitted output.
-     * The emitted output name can be different from the input if:
-     *  1. The module has a /// <amd-module name="<new name>" />
-     *  2. --out or --outFile is used, making the name relative to the rootDir
-     * Otherwise, a new StringLiteral node representing the module name will be returned.
-     */
     function tryGetModuleNameFromFile(file, host, options) {
         if (!file) {
             return undefined;
@@ -59098,140 +49388,66 @@ var ts;
     function tryGetModuleNameFromDeclaration(declaration, host, resolver, compilerOptions) {
         return tryGetModuleNameFromFile(resolver.getExternalModuleFileFromDeclaration(declaration), host, compilerOptions);
     }
-    /**
-     * Gets the initializer of an BindingOrAssignmentElement.
-     */
     function getInitializerOfBindingOrAssignmentElement(bindingElement) {
         if (ts.isDeclarationBindingElement(bindingElement)) {
-            // `1` in `let { a = 1 } = ...`
-            // `1` in `let { a: b = 1 } = ...`
-            // `1` in `let { a: {b} = 1 } = ...`
-            // `1` in `let { a: [b] = 1 } = ...`
-            // `1` in `let [a = 1] = ...`
-            // `1` in `let [{a} = 1] = ...`
-            // `1` in `let [[a] = 1] = ...`
             return bindingElement.initializer;
         }
         if (ts.isPropertyAssignment(bindingElement)) {
-            // `1` in `({ a: b = 1 } = ...)`
-            // `1` in `({ a: {b} = 1 } = ...)`
-            // `1` in `({ a: [b] = 1 } = ...)`
             var initializer = bindingElement.initializer;
-            return ts.isAssignmentExpression(initializer, /*excludeCompoundAssignment*/ true)
+            return ts.isAssignmentExpression(initializer, true)
                 ? initializer.right
                 : undefined;
         }
         if (ts.isShorthandPropertyAssignment(bindingElement)) {
-            // `1` in `({ a = 1 } = ...)`
             return bindingElement.objectAssignmentInitializer;
         }
-        if (ts.isAssignmentExpression(bindingElement, /*excludeCompoundAssignment*/ true)) {
-            // `1` in `[a = 1] = ...`
-            // `1` in `[{a} = 1] = ...`
-            // `1` in `[[a] = 1] = ...`
+        if (ts.isAssignmentExpression(bindingElement, true)) {
             return bindingElement.right;
         }
         if (ts.isSpreadElement(bindingElement)) {
-            // Recovery consistent with existing emit.
             return getInitializerOfBindingOrAssignmentElement(bindingElement.expression);
         }
     }
     ts.getInitializerOfBindingOrAssignmentElement = getInitializerOfBindingOrAssignmentElement;
-    /**
-     * Gets the name of an BindingOrAssignmentElement.
-     */
     function getTargetOfBindingOrAssignmentElement(bindingElement) {
         if (ts.isDeclarationBindingElement(bindingElement)) {
-            // `a` in `let { a } = ...`
-            // `a` in `let { a = 1 } = ...`
-            // `b` in `let { a: b } = ...`
-            // `b` in `let { a: b = 1 } = ...`
-            // `a` in `let { ...a } = ...`
-            // `{b}` in `let { a: {b} } = ...`
-            // `{b}` in `let { a: {b} = 1 } = ...`
-            // `[b]` in `let { a: [b] } = ...`
-            // `[b]` in `let { a: [b] = 1 } = ...`
-            // `a` in `let [a] = ...`
-            // `a` in `let [a = 1] = ...`
-            // `a` in `let [...a] = ...`
-            // `{a}` in `let [{a}] = ...`
-            // `{a}` in `let [{a} = 1] = ...`
-            // `[a]` in `let [[a]] = ...`
-            // `[a]` in `let [[a] = 1] = ...`
             return bindingElement.name;
         }
         if (ts.isObjectLiteralElementLike(bindingElement)) {
             switch (bindingElement.kind) {
-                case 270 /* PropertyAssignment */:
-                    // `b` in `({ a: b } = ...)`
-                    // `b` in `({ a: b = 1 } = ...)`
-                    // `{b}` in `({ a: {b} } = ...)`
-                    // `{b}` in `({ a: {b} = 1 } = ...)`
-                    // `[b]` in `({ a: [b] } = ...)`
-                    // `[b]` in `({ a: [b] = 1 } = ...)`
-                    // `b.c` in `({ a: b.c } = ...)`
-                    // `b.c` in `({ a: b.c = 1 } = ...)`
-                    // `b[0]` in `({ a: b[0] } = ...)`
-                    // `b[0]` in `({ a: b[0] = 1 } = ...)`
+                case 270:
                     return getTargetOfBindingOrAssignmentElement(bindingElement.initializer);
-                case 271 /* ShorthandPropertyAssignment */:
-                    // `a` in `({ a } = ...)`
-                    // `a` in `({ a = 1 } = ...)`
+                case 271:
                     return bindingElement.name;
-                case 272 /* SpreadAssignment */:
-                    // `a` in `({ ...a } = ...)`
+                case 272:
                     return getTargetOfBindingOrAssignmentElement(bindingElement.expression);
             }
-            // no target
             return undefined;
         }
-        if (ts.isAssignmentExpression(bindingElement, /*excludeCompoundAssignment*/ true)) {
-            // `a` in `[a = 1] = ...`
-            // `{a}` in `[{a} = 1] = ...`
-            // `[a]` in `[[a] = 1] = ...`
-            // `a.b` in `[a.b = 1] = ...`
-            // `a[0]` in `[a[0] = 1] = ...`
+        if (ts.isAssignmentExpression(bindingElement, true)) {
             return getTargetOfBindingOrAssignmentElement(bindingElement.left);
         }
         if (ts.isSpreadElement(bindingElement)) {
-            // `a` in `[...a] = ...`
             return getTargetOfBindingOrAssignmentElement(bindingElement.expression);
         }
-        // `a` in `[a] = ...`
-        // `{a}` in `[{a}] = ...`
-        // `[a]` in `[[a]] = ...`
-        // `a.b` in `[a.b] = ...`
-        // `a[0]` in `[a[0]] = ...`
         return bindingElement;
     }
     ts.getTargetOfBindingOrAssignmentElement = getTargetOfBindingOrAssignmentElement;
-    /**
-     * Determines whether an BindingOrAssignmentElement is a rest element.
-     */
     function getRestIndicatorOfBindingOrAssignmentElement(bindingElement) {
         switch (bindingElement.kind) {
-            case 149 /* Parameter */:
-            case 182 /* BindingElement */:
-                // `...` in `let [...a] = ...`
+            case 149:
+            case 182:
                 return bindingElement.dotDotDotToken;
-            case 204 /* SpreadElement */:
-            case 272 /* SpreadAssignment */:
-                // `...` in `[...a] = ...`
+            case 204:
+            case 272:
                 return bindingElement;
         }
         return undefined;
     }
     ts.getRestIndicatorOfBindingOrAssignmentElement = getRestIndicatorOfBindingOrAssignmentElement;
-    /**
-     * Gets the property name of a BindingOrAssignmentElement
-     */
     function getPropertyNameOfBindingOrAssignmentElement(bindingElement) {
         switch (bindingElement.kind) {
-            case 182 /* BindingElement */:
-                // `a` in `let { a: b } = ...`
-                // `[a]` in `let { [a]: b } = ...`
-                // `"a"` in `let { "a": b } = ...`
-                // `1` in `let { 1: b } = ...`
+            case 182:
                 if (bindingElement.propertyName) {
                     var propertyName = bindingElement.propertyName;
                     return ts.isComputedPropertyName(propertyName) && ts.isStringOrNumericLiteral(propertyName.expression)
@@ -59239,11 +49455,7 @@ var ts;
                         : propertyName;
                 }
                 break;
-            case 270 /* PropertyAssignment */:
-                // `a` in `({ a: b } = ...)`
-                // `[a]` in `({ [a]: b } = ...)`
-                // `"a"` in `({ "a": b } = ...)`
-                // `1` in `({ 1: b } = ...)`
+            case 270:
                 if (bindingElement.name) {
                     var propertyName = bindingElement.name;
                     return ts.isComputedPropertyName(propertyName) && ts.isStringOrNumericLiteral(propertyName.expression)
@@ -59251,8 +49463,7 @@ var ts;
                         : propertyName;
                 }
                 break;
-            case 272 /* SpreadAssignment */:
-                // `a` in `({ ...a } = ...)`
+            case 272:
                 return bindingElement.name;
         }
         var target = getTargetOfBindingOrAssignmentElement(bindingElement);
@@ -59264,19 +49475,13 @@ var ts;
         ts.Debug.fail("Invalid property name for binding element.");
     }
     ts.getPropertyNameOfBindingOrAssignmentElement = getPropertyNameOfBindingOrAssignmentElement;
-    /**
-     * Gets the elements of a BindingOrAssignmentPattern
-     */
     function getElementsOfBindingOrAssignmentPattern(name) {
         switch (name.kind) {
-            case 180 /* ObjectBindingPattern */:
-            case 181 /* ArrayBindingPattern */:
-            case 183 /* ArrayLiteralExpression */:
-                // `a` in `{a}`
-                // `a` in `[a]`
+            case 180:
+            case 181:
+            case 183:
                 return name.elements;
-            case 184 /* ObjectLiteralExpression */:
-                // `a` in `{a}`
+            case 184:
                 return name.properties;
         }
     }
@@ -59315,11 +49520,11 @@ var ts;
     ts.convertToObjectAssignmentElement = convertToObjectAssignmentElement;
     function convertToAssignmentPattern(node) {
         switch (node.kind) {
-            case 181 /* ArrayBindingPattern */:
-            case 183 /* ArrayLiteralExpression */:
+            case 181:
+            case 183:
                 return convertToArrayAssignmentPattern(node);
-            case 180 /* ObjectBindingPattern */:
-            case 184 /* ObjectLiteralExpression */:
+            case 180:
+            case 184:
                 return convertToObjectAssignmentPattern(node);
         }
     }
@@ -59376,21 +49581,11 @@ var ts;
         return visitedNode;
     }
     ts.visitNode = visitNode;
-    /**
-     * Visits a NodeArray using the supplied visitor, possibly returning a new NodeArray in its place.
-     *
-     * @param nodes The NodeArray to visit.
-     * @param visitor The callback used to visit a Node.
-     * @param test A node test to execute for each node.
-     * @param start An optional value indicating the starting offset at which to start visiting.
-     * @param count An optional value indicating the maximum number of nodes to visit.
-     */
     function visitNodes(nodes, visitor, test, start, count) {
         if (nodes === undefined || visitor === undefined) {
             return nodes;
         }
         var updated;
-        // Ensure start and count have valid values
         var length = nodes.length;
         if (start === undefined || start < 0) {
             start = 0;
@@ -59399,19 +49594,14 @@ var ts;
             count = length - start;
         }
         if (start > 0 || count < length) {
-            // If we are not visiting all of the original nodes, we must always create a new array.
-            // Since this is a fragment of a node array, we do not copy over the previous location
-            // and will only copy over `hasTrailingComma` if we are including the last element.
-            updated = ts.createNodeArray([], /*hasTrailingComma*/ nodes.hasTrailingComma && start + count === length);
+            updated = ts.createNodeArray([], nodes.hasTrailingComma && start + count === length);
         }
-        // Visit each original node.
         for (var i = 0; i < count; i++) {
             var node = nodes[i + start];
             ts.aggregateTransformFlags(node);
             var visited = node !== undefined ? visitor(node) : undefined;
             if (updated !== undefined || visited === undefined || visited !== node) {
                 if (updated === undefined) {
-                    // Ensure we have a copy of `nodes`, up to the current index.
                     updated = ts.createNodeArray(nodes.slice(0, i), nodes.hasTrailingComma);
                     ts.setTextRange(updated, nodes);
                 }
@@ -59435,10 +49625,6 @@ var ts;
         return updated || nodes;
     }
     ts.visitNodes = visitNodes;
-    /**
-     * Starts a new lexical environment and visits a statement list, ending the lexical environment
-     * and merging hoisted declarations upon completion.
-     */
     function visitLexicalEnvironment(statements, visitor, context, start, ensureUseStrict) {
         context.startLexicalEnvironment();
         statements = visitNodes(statements, visitor, ts.isStatement, start);
@@ -59449,10 +49635,6 @@ var ts;
         return ts.setTextRange(ts.createNodeArray(ts.concatenate(declarations, statements)), statements);
     }
     ts.visitLexicalEnvironment = visitLexicalEnvironment;
-    /**
-     * Starts a new lexical environment and visits a parameter list, suspending the lexical
-     * environment upon completion.
-     */
     function visitParameterList(nodes, visitor, context, nodesVisitor) {
         if (nodesVisitor === void 0) { nodesVisitor = visitNodes; }
         context.startLexicalEnvironment();
@@ -59479,291 +49661,268 @@ var ts;
             return undefined;
         }
         var kind = node.kind;
-        // No need to visit nodes with no children.
-        if ((kind > 0 /* FirstToken */ && kind <= 145 /* LastToken */) || kind === 174 /* ThisType */) {
+        if ((kind > 0 && kind <= 145) || kind === 174) {
             return node;
         }
         switch (kind) {
-            // Names
-            case 71 /* Identifier */:
+            case 71:
                 return ts.updateIdentifier(node, nodesVisitor(node.typeArguments, visitor, isTypeNodeOrTypeParameterDeclaration));
-            case 146 /* QualifiedName */:
+            case 146:
                 return ts.updateQualifiedName(node, visitNode(node.left, visitor, ts.isEntityName), visitNode(node.right, visitor, ts.isIdentifier));
-            case 147 /* ComputedPropertyName */:
+            case 147:
                 return ts.updateComputedPropertyName(node, visitNode(node.expression, visitor, ts.isExpression));
-            // Signature elements
-            case 148 /* TypeParameter */:
+            case 148:
                 return ts.updateTypeParameterDeclaration(node, visitNode(node.name, visitor, ts.isIdentifier), visitNode(node.constraint, visitor, ts.isTypeNode), visitNode(node.default, visitor, ts.isTypeNode));
-            case 149 /* Parameter */:
+            case 149:
                 return ts.updateParameter(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.dotDotDotToken, tokenVisitor, ts.isToken), visitNode(node.name, visitor, ts.isBindingName), visitNode(node.questionToken, tokenVisitor, ts.isToken), visitNode(node.type, visitor, ts.isTypeNode), visitNode(node.initializer, visitor, ts.isExpression));
-            case 150 /* Decorator */:
+            case 150:
                 return ts.updateDecorator(node, visitNode(node.expression, visitor, ts.isExpression));
-            // Type elements
-            case 151 /* PropertySignature */:
+            case 151:
                 return ts.updatePropertySignature(node, nodesVisitor(node.modifiers, visitor, ts.isToken), visitNode(node.name, visitor, ts.isPropertyName), visitNode(node.questionToken, tokenVisitor, ts.isToken), visitNode(node.type, visitor, ts.isTypeNode), visitNode(node.initializer, visitor, ts.isExpression));
-            case 152 /* PropertyDeclaration */:
+            case 152:
                 return ts.updateProperty(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isPropertyName), visitNode(node.questionToken, tokenVisitor, ts.isToken), visitNode(node.type, visitor, ts.isTypeNode), visitNode(node.initializer, visitor, ts.isExpression));
-            case 153 /* MethodSignature */:
+            case 153:
                 return ts.updateMethodSignature(node, nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), nodesVisitor(node.parameters, visitor, ts.isParameterDeclaration), visitNode(node.type, visitor, ts.isTypeNode), visitNode(node.name, visitor, ts.isPropertyName), visitNode(node.questionToken, tokenVisitor, ts.isToken));
-            case 154 /* MethodDeclaration */:
+            case 154:
                 return ts.updateMethod(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.asteriskToken, tokenVisitor, ts.isToken), visitNode(node.name, visitor, ts.isPropertyName), visitNode(node.questionToken, tokenVisitor, ts.isToken), nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), visitParameterList(node.parameters, visitor, context, nodesVisitor), visitNode(node.type, visitor, ts.isTypeNode), visitFunctionBody(node.body, visitor, context));
-            case 155 /* Constructor */:
+            case 155:
                 return ts.updateConstructor(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitParameterList(node.parameters, visitor, context, nodesVisitor), visitFunctionBody(node.body, visitor, context));
-            case 156 /* GetAccessor */:
+            case 156:
                 return ts.updateGetAccessor(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isPropertyName), visitParameterList(node.parameters, visitor, context, nodesVisitor), visitNode(node.type, visitor, ts.isTypeNode), visitFunctionBody(node.body, visitor, context));
-            case 157 /* SetAccessor */:
+            case 157:
                 return ts.updateSetAccessor(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isPropertyName), visitParameterList(node.parameters, visitor, context, nodesVisitor), visitFunctionBody(node.body, visitor, context));
-            case 158 /* CallSignature */:
+            case 158:
                 return ts.updateCallSignature(node, nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), nodesVisitor(node.parameters, visitor, ts.isParameterDeclaration), visitNode(node.type, visitor, ts.isTypeNode));
-            case 159 /* ConstructSignature */:
+            case 159:
                 return ts.updateConstructSignature(node, nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), nodesVisitor(node.parameters, visitor, ts.isParameterDeclaration), visitNode(node.type, visitor, ts.isTypeNode));
-            case 160 /* IndexSignature */:
+            case 160:
                 return ts.updateIndexSignature(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), nodesVisitor(node.parameters, visitor, ts.isParameterDeclaration), visitNode(node.type, visitor, ts.isTypeNode));
-            // Types
-            case 161 /* TypePredicate */:
+            case 161:
                 return ts.updateTypePredicateNode(node, visitNode(node.parameterName, visitor), visitNode(node.type, visitor, ts.isTypeNode));
-            case 162 /* TypeReference */:
+            case 162:
                 return ts.updateTypeReferenceNode(node, visitNode(node.typeName, visitor, ts.isEntityName), nodesVisitor(node.typeArguments, visitor, ts.isTypeNode));
-            case 163 /* FunctionType */:
+            case 163:
                 return ts.updateFunctionTypeNode(node, nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), nodesVisitor(node.parameters, visitor, ts.isParameterDeclaration), visitNode(node.type, visitor, ts.isTypeNode));
-            case 164 /* ConstructorType */:
+            case 164:
                 return ts.updateConstructorTypeNode(node, nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), nodesVisitor(node.parameters, visitor, ts.isParameterDeclaration), visitNode(node.type, visitor, ts.isTypeNode));
-            case 165 /* TypeQuery */:
+            case 165:
                 return ts.updateTypeQueryNode(node, visitNode(node.exprName, visitor, ts.isEntityName));
-            case 166 /* TypeLiteral */:
+            case 166:
                 return ts.updateTypeLiteralNode(node, nodesVisitor(node.members, visitor, ts.isTypeElement));
-            case 167 /* ArrayType */:
+            case 167:
                 return ts.updateArrayTypeNode(node, visitNode(node.elementType, visitor, ts.isTypeNode));
-            case 168 /* TupleType */:
+            case 168:
                 return ts.updateTypleTypeNode(node, nodesVisitor(node.elementTypes, visitor, ts.isTypeNode));
-            case 169 /* UnionType */:
+            case 169:
                 return ts.updateUnionTypeNode(node, nodesVisitor(node.types, visitor, ts.isTypeNode));
-            case 170 /* IntersectionType */:
+            case 170:
                 return ts.updateIntersectionTypeNode(node, nodesVisitor(node.types, visitor, ts.isTypeNode));
-            case 171 /* ConditionalType */:
+            case 171:
                 return ts.updateConditionalTypeNode(node, visitNode(node.checkType, visitor, ts.isTypeNode), visitNode(node.extendsType, visitor, ts.isTypeNode), visitNode(node.trueType, visitor, ts.isTypeNode), visitNode(node.falseType, visitor, ts.isTypeNode));
-            case 172 /* InferType */:
+            case 172:
                 return ts.updateInferTypeNode(node, visitNode(node.typeParameter, visitor, ts.isTypeParameterDeclaration));
-            case 179 /* ImportType */:
+            case 179:
                 return ts.updateImportTypeNode(node, visitNode(node.argument, visitor, ts.isTypeNode), visitNode(node.qualifier, visitor, ts.isEntityName), visitNodes(node.typeArguments, visitor, ts.isTypeNode), node.isTypeOf);
-            case 173 /* ParenthesizedType */:
+            case 173:
                 return ts.updateParenthesizedType(node, visitNode(node.type, visitor, ts.isTypeNode));
-            case 175 /* TypeOperator */:
+            case 175:
                 return ts.updateTypeOperatorNode(node, visitNode(node.type, visitor, ts.isTypeNode));
-            case 176 /* IndexedAccessType */:
+            case 176:
                 return ts.updateIndexedAccessTypeNode(node, visitNode(node.objectType, visitor, ts.isTypeNode), visitNode(node.indexType, visitor, ts.isTypeNode));
-            case 177 /* MappedType */:
+            case 177:
                 return ts.updateMappedTypeNode(node, visitNode(node.readonlyToken, tokenVisitor, ts.isToken), visitNode(node.typeParameter, visitor, ts.isTypeParameterDeclaration), visitNode(node.questionToken, tokenVisitor, ts.isToken), visitNode(node.type, visitor, ts.isTypeNode));
-            case 178 /* LiteralType */:
+            case 178:
                 return ts.updateLiteralTypeNode(node, visitNode(node.literal, visitor, ts.isExpression));
-            // Binding patterns
-            case 180 /* ObjectBindingPattern */:
+            case 180:
                 return ts.updateObjectBindingPattern(node, nodesVisitor(node.elements, visitor, ts.isBindingElement));
-            case 181 /* ArrayBindingPattern */:
+            case 181:
                 return ts.updateArrayBindingPattern(node, nodesVisitor(node.elements, visitor, ts.isArrayBindingElement));
-            case 182 /* BindingElement */:
+            case 182:
                 return ts.updateBindingElement(node, visitNode(node.dotDotDotToken, tokenVisitor, ts.isToken), visitNode(node.propertyName, visitor, ts.isPropertyName), visitNode(node.name, visitor, ts.isBindingName), visitNode(node.initializer, visitor, ts.isExpression));
-            // Expression
-            case 183 /* ArrayLiteralExpression */:
+            case 183:
                 return ts.updateArrayLiteral(node, nodesVisitor(node.elements, visitor, ts.isExpression));
-            case 184 /* ObjectLiteralExpression */:
+            case 184:
                 return ts.updateObjectLiteral(node, nodesVisitor(node.properties, visitor, ts.isObjectLiteralElementLike));
-            case 185 /* PropertyAccessExpression */:
+            case 185:
                 return ts.updatePropertyAccess(node, visitNode(node.expression, visitor, ts.isExpression), visitNode(node.name, visitor, ts.isIdentifier));
-            case 186 /* ElementAccessExpression */:
+            case 186:
                 return ts.updateElementAccess(node, visitNode(node.expression, visitor, ts.isExpression), visitNode(node.argumentExpression, visitor, ts.isExpression));
-            case 187 /* CallExpression */:
+            case 187:
                 return ts.updateCall(node, visitNode(node.expression, visitor, ts.isExpression), nodesVisitor(node.typeArguments, visitor, ts.isTypeNode), nodesVisitor(node.arguments, visitor, ts.isExpression));
-            case 188 /* NewExpression */:
+            case 188:
                 return ts.updateNew(node, visitNode(node.expression, visitor, ts.isExpression), nodesVisitor(node.typeArguments, visitor, ts.isTypeNode), nodesVisitor(node.arguments, visitor, ts.isExpression));
-            case 189 /* TaggedTemplateExpression */:
+            case 189:
                 return ts.updateTaggedTemplate(node, visitNode(node.tag, visitor, ts.isExpression), visitNodes(node.typeArguments, visitor, ts.isExpression), visitNode(node.template, visitor, ts.isTemplateLiteral));
-            case 190 /* TypeAssertionExpression */:
+            case 190:
                 return ts.updateTypeAssertion(node, visitNode(node.type, visitor, ts.isTypeNode), visitNode(node.expression, visitor, ts.isExpression));
-            case 191 /* ParenthesizedExpression */:
+            case 191:
                 return ts.updateParen(node, visitNode(node.expression, visitor, ts.isExpression));
-            case 192 /* FunctionExpression */:
+            case 192:
                 return ts.updateFunctionExpression(node, nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.asteriskToken, tokenVisitor, ts.isToken), visitNode(node.name, visitor, ts.isIdentifier), nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), visitParameterList(node.parameters, visitor, context, nodesVisitor), visitNode(node.type, visitor, ts.isTypeNode), visitFunctionBody(node.body, visitor, context));
-            case 193 /* ArrowFunction */:
+            case 193:
                 return ts.updateArrowFunction(node, nodesVisitor(node.modifiers, visitor, ts.isModifier), nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), visitParameterList(node.parameters, visitor, context, nodesVisitor), visitNode(node.type, visitor, ts.isTypeNode), visitNode(node.equalsGreaterThanToken, visitor, ts.isToken), visitFunctionBody(node.body, visitor, context));
-            case 194 /* DeleteExpression */:
+            case 194:
                 return ts.updateDelete(node, visitNode(node.expression, visitor, ts.isExpression));
-            case 195 /* TypeOfExpression */:
+            case 195:
                 return ts.updateTypeOf(node, visitNode(node.expression, visitor, ts.isExpression));
-            case 196 /* VoidExpression */:
+            case 196:
                 return ts.updateVoid(node, visitNode(node.expression, visitor, ts.isExpression));
-            case 197 /* AwaitExpression */:
+            case 197:
                 return ts.updateAwait(node, visitNode(node.expression, visitor, ts.isExpression));
-            case 198 /* PrefixUnaryExpression */:
+            case 198:
                 return ts.updatePrefix(node, visitNode(node.operand, visitor, ts.isExpression));
-            case 199 /* PostfixUnaryExpression */:
+            case 199:
                 return ts.updatePostfix(node, visitNode(node.operand, visitor, ts.isExpression));
-            case 200 /* BinaryExpression */:
+            case 200:
                 return ts.updateBinary(node, visitNode(node.left, visitor, ts.isExpression), visitNode(node.right, visitor, ts.isExpression), visitNode(node.operatorToken, visitor, ts.isToken));
-            case 201 /* ConditionalExpression */:
+            case 201:
                 return ts.updateConditional(node, visitNode(node.condition, visitor, ts.isExpression), visitNode(node.questionToken, visitor, ts.isToken), visitNode(node.whenTrue, visitor, ts.isExpression), visitNode(node.colonToken, visitor, ts.isToken), visitNode(node.whenFalse, visitor, ts.isExpression));
-            case 202 /* TemplateExpression */:
+            case 202:
                 return ts.updateTemplateExpression(node, visitNode(node.head, visitor, ts.isTemplateHead), nodesVisitor(node.templateSpans, visitor, ts.isTemplateSpan));
-            case 203 /* YieldExpression */:
+            case 203:
                 return ts.updateYield(node, visitNode(node.asteriskToken, tokenVisitor, ts.isToken), visitNode(node.expression, visitor, ts.isExpression));
-            case 204 /* SpreadElement */:
+            case 204:
                 return ts.updateSpread(node, visitNode(node.expression, visitor, ts.isExpression));
-            case 205 /* ClassExpression */:
+            case 205:
                 return ts.updateClassExpression(node, nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isIdentifier), nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), nodesVisitor(node.heritageClauses, visitor, ts.isHeritageClause), nodesVisitor(node.members, visitor, ts.isClassElement));
-            case 207 /* ExpressionWithTypeArguments */:
+            case 207:
                 return ts.updateExpressionWithTypeArguments(node, nodesVisitor(node.typeArguments, visitor, ts.isTypeNode), visitNode(node.expression, visitor, ts.isExpression));
-            case 208 /* AsExpression */:
+            case 208:
                 return ts.updateAsExpression(node, visitNode(node.expression, visitor, ts.isExpression), visitNode(node.type, visitor, ts.isTypeNode));
-            case 209 /* NonNullExpression */:
+            case 209:
                 return ts.updateNonNullExpression(node, visitNode(node.expression, visitor, ts.isExpression));
-            case 210 /* MetaProperty */:
+            case 210:
                 return ts.updateMetaProperty(node, visitNode(node.name, visitor, ts.isIdentifier));
-            // Misc
-            case 211 /* TemplateSpan */:
+            case 211:
                 return ts.updateTemplateSpan(node, visitNode(node.expression, visitor, ts.isExpression), visitNode(node.literal, visitor, ts.isTemplateMiddleOrTemplateTail));
-            // Element
-            case 213 /* Block */:
+            case 213:
                 return ts.updateBlock(node, nodesVisitor(node.statements, visitor, ts.isStatement));
-            case 214 /* VariableStatement */:
+            case 214:
                 return ts.updateVariableStatement(node, nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.declarationList, visitor, ts.isVariableDeclarationList));
-            case 216 /* ExpressionStatement */:
+            case 216:
                 return ts.updateStatement(node, visitNode(node.expression, visitor, ts.isExpression));
-            case 217 /* IfStatement */:
+            case 217:
                 return ts.updateIf(node, visitNode(node.expression, visitor, ts.isExpression), visitNode(node.thenStatement, visitor, ts.isStatement, ts.liftToBlock), visitNode(node.elseStatement, visitor, ts.isStatement, ts.liftToBlock));
-            case 218 /* DoStatement */:
+            case 218:
                 return ts.updateDo(node, visitNode(node.statement, visitor, ts.isStatement, ts.liftToBlock), visitNode(node.expression, visitor, ts.isExpression));
-            case 219 /* WhileStatement */:
+            case 219:
                 return ts.updateWhile(node, visitNode(node.expression, visitor, ts.isExpression), visitNode(node.statement, visitor, ts.isStatement, ts.liftToBlock));
-            case 220 /* ForStatement */:
+            case 220:
                 return ts.updateFor(node, visitNode(node.initializer, visitor, ts.isForInitializer), visitNode(node.condition, visitor, ts.isExpression), visitNode(node.incrementor, visitor, ts.isExpression), visitNode(node.statement, visitor, ts.isStatement, ts.liftToBlock));
-            case 221 /* ForInStatement */:
+            case 221:
                 return ts.updateForIn(node, visitNode(node.initializer, visitor, ts.isForInitializer), visitNode(node.expression, visitor, ts.isExpression), visitNode(node.statement, visitor, ts.isStatement, ts.liftToBlock));
-            case 222 /* ForOfStatement */:
+            case 222:
                 return ts.updateForOf(node, visitNode(node.awaitModifier, visitor, ts.isToken), visitNode(node.initializer, visitor, ts.isForInitializer), visitNode(node.expression, visitor, ts.isExpression), visitNode(node.statement, visitor, ts.isStatement, ts.liftToBlock));
-            case 223 /* ContinueStatement */:
+            case 223:
                 return ts.updateContinue(node, visitNode(node.label, visitor, ts.isIdentifier));
-            case 224 /* BreakStatement */:
+            case 224:
                 return ts.updateBreak(node, visitNode(node.label, visitor, ts.isIdentifier));
-            case 225 /* ReturnStatement */:
+            case 225:
                 return ts.updateReturn(node, visitNode(node.expression, visitor, ts.isExpression));
-            case 226 /* WithStatement */:
+            case 226:
                 return ts.updateWith(node, visitNode(node.expression, visitor, ts.isExpression), visitNode(node.statement, visitor, ts.isStatement, ts.liftToBlock));
-            case 227 /* SwitchStatement */:
+            case 227:
                 return ts.updateSwitch(node, visitNode(node.expression, visitor, ts.isExpression), visitNode(node.caseBlock, visitor, ts.isCaseBlock));
-            case 228 /* LabeledStatement */:
+            case 228:
                 return ts.updateLabel(node, visitNode(node.label, visitor, ts.isIdentifier), visitNode(node.statement, visitor, ts.isStatement, ts.liftToBlock));
-            case 229 /* ThrowStatement */:
+            case 229:
                 return ts.updateThrow(node, visitNode(node.expression, visitor, ts.isExpression));
-            case 230 /* TryStatement */:
+            case 230:
                 return ts.updateTry(node, visitNode(node.tryBlock, visitor, ts.isBlock), visitNode(node.catchClause, visitor, ts.isCatchClause), visitNode(node.finallyBlock, visitor, ts.isBlock));
-            case 232 /* VariableDeclaration */:
+            case 232:
                 return ts.updateVariableDeclaration(node, visitNode(node.name, visitor, ts.isBindingName), visitNode(node.type, visitor, ts.isTypeNode), visitNode(node.initializer, visitor, ts.isExpression));
-            case 233 /* VariableDeclarationList */:
+            case 233:
                 return ts.updateVariableDeclarationList(node, nodesVisitor(node.declarations, visitor, ts.isVariableDeclaration));
-            case 234 /* FunctionDeclaration */:
+            case 234:
                 return ts.updateFunctionDeclaration(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.asteriskToken, tokenVisitor, ts.isToken), visitNode(node.name, visitor, ts.isIdentifier), nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), visitParameterList(node.parameters, visitor, context, nodesVisitor), visitNode(node.type, visitor, ts.isTypeNode), visitFunctionBody(node.body, visitor, context));
-            case 235 /* ClassDeclaration */:
+            case 235:
                 return ts.updateClassDeclaration(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isIdentifier), nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), nodesVisitor(node.heritageClauses, visitor, ts.isHeritageClause), nodesVisitor(node.members, visitor, ts.isClassElement));
-            case 236 /* InterfaceDeclaration */:
+            case 236:
                 return ts.updateInterfaceDeclaration(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isIdentifier), nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), nodesVisitor(node.heritageClauses, visitor, ts.isHeritageClause), nodesVisitor(node.members, visitor, ts.isTypeElement));
-            case 237 /* TypeAliasDeclaration */:
+            case 237:
                 return ts.updateTypeAliasDeclaration(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isIdentifier), nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), visitNode(node.type, visitor, ts.isTypeNode));
-            case 238 /* EnumDeclaration */:
+            case 238:
                 return ts.updateEnumDeclaration(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isIdentifier), nodesVisitor(node.members, visitor, ts.isEnumMember));
-            case 239 /* ModuleDeclaration */:
+            case 239:
                 return ts.updateModuleDeclaration(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isIdentifier), visitNode(node.body, visitor, ts.isModuleBody));
-            case 240 /* ModuleBlock */:
+            case 240:
                 return ts.updateModuleBlock(node, nodesVisitor(node.statements, visitor, ts.isStatement));
-            case 241 /* CaseBlock */:
+            case 241:
                 return ts.updateCaseBlock(node, nodesVisitor(node.clauses, visitor, ts.isCaseOrDefaultClause));
-            case 242 /* NamespaceExportDeclaration */:
+            case 242:
                 return ts.updateNamespaceExportDeclaration(node, visitNode(node.name, visitor, ts.isIdentifier));
-            case 243 /* ImportEqualsDeclaration */:
+            case 243:
                 return ts.updateImportEqualsDeclaration(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isIdentifier), visitNode(node.moduleReference, visitor, ts.isModuleReference));
-            case 244 /* ImportDeclaration */:
+            case 244:
                 return ts.updateImportDeclaration(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.importClause, visitor, ts.isImportClause), visitNode(node.moduleSpecifier, visitor, ts.isExpression));
-            case 245 /* ImportClause */:
+            case 245:
                 return ts.updateImportClause(node, visitNode(node.name, visitor, ts.isIdentifier), visitNode(node.namedBindings, visitor, ts.isNamedImportBindings));
-            case 246 /* NamespaceImport */:
+            case 246:
                 return ts.updateNamespaceImport(node, visitNode(node.name, visitor, ts.isIdentifier));
-            case 247 /* NamedImports */:
+            case 247:
                 return ts.updateNamedImports(node, nodesVisitor(node.elements, visitor, ts.isImportSpecifier));
-            case 248 /* ImportSpecifier */:
+            case 248:
                 return ts.updateImportSpecifier(node, visitNode(node.propertyName, visitor, ts.isIdentifier), visitNode(node.name, visitor, ts.isIdentifier));
-            case 249 /* ExportAssignment */:
+            case 249:
                 return ts.updateExportAssignment(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.expression, visitor, ts.isExpression));
-            case 250 /* ExportDeclaration */:
+            case 250:
                 return ts.updateExportDeclaration(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.exportClause, visitor, ts.isNamedExports), visitNode(node.moduleSpecifier, visitor, ts.isExpression));
-            case 251 /* NamedExports */:
+            case 251:
                 return ts.updateNamedExports(node, nodesVisitor(node.elements, visitor, ts.isExportSpecifier));
-            case 252 /* ExportSpecifier */:
+            case 252:
                 return ts.updateExportSpecifier(node, visitNode(node.propertyName, visitor, ts.isIdentifier), visitNode(node.name, visitor, ts.isIdentifier));
-            // Module references
-            case 254 /* ExternalModuleReference */:
+            case 254:
                 return ts.updateExternalModuleReference(node, visitNode(node.expression, visitor, ts.isExpression));
-            // JSX
-            case 255 /* JsxElement */:
+            case 255:
                 return ts.updateJsxElement(node, visitNode(node.openingElement, visitor, ts.isJsxOpeningElement), nodesVisitor(node.children, visitor, ts.isJsxChild), visitNode(node.closingElement, visitor, ts.isJsxClosingElement));
-            case 256 /* JsxSelfClosingElement */:
+            case 256:
                 return ts.updateJsxSelfClosingElement(node, visitNode(node.tagName, visitor, ts.isJsxTagNameExpression), nodesVisitor(node.typeArguments, visitor, ts.isTypeNode), visitNode(node.attributes, visitor, ts.isJsxAttributes));
-            case 257 /* JsxOpeningElement */:
+            case 257:
                 return ts.updateJsxOpeningElement(node, visitNode(node.tagName, visitor, ts.isJsxTagNameExpression), nodesVisitor(node.typeArguments, visitor, ts.isTypeNode), visitNode(node.attributes, visitor, ts.isJsxAttributes));
-            case 258 /* JsxClosingElement */:
+            case 258:
                 return ts.updateJsxClosingElement(node, visitNode(node.tagName, visitor, ts.isJsxTagNameExpression));
-            case 259 /* JsxFragment */:
+            case 259:
                 return ts.updateJsxFragment(node, visitNode(node.openingFragment, visitor, ts.isJsxOpeningFragment), nodesVisitor(node.children, visitor, ts.isJsxChild), visitNode(node.closingFragment, visitor, ts.isJsxClosingFragment));
-            case 262 /* JsxAttribute */:
+            case 262:
                 return ts.updateJsxAttribute(node, visitNode(node.name, visitor, ts.isIdentifier), visitNode(node.initializer, visitor, ts.isStringLiteralOrJsxExpression));
-            case 263 /* JsxAttributes */:
+            case 263:
                 return ts.updateJsxAttributes(node, nodesVisitor(node.properties, visitor, ts.isJsxAttributeLike));
-            case 264 /* JsxSpreadAttribute */:
+            case 264:
                 return ts.updateJsxSpreadAttribute(node, visitNode(node.expression, visitor, ts.isExpression));
-            case 265 /* JsxExpression */:
+            case 265:
                 return ts.updateJsxExpression(node, visitNode(node.expression, visitor, ts.isExpression));
-            // Clauses
-            case 266 /* CaseClause */:
+            case 266:
                 return ts.updateCaseClause(node, visitNode(node.expression, visitor, ts.isExpression), nodesVisitor(node.statements, visitor, ts.isStatement));
-            case 267 /* DefaultClause */:
+            case 267:
                 return ts.updateDefaultClause(node, nodesVisitor(node.statements, visitor, ts.isStatement));
-            case 268 /* HeritageClause */:
+            case 268:
                 return ts.updateHeritageClause(node, nodesVisitor(node.types, visitor, ts.isExpressionWithTypeArguments));
-            case 269 /* CatchClause */:
+            case 269:
                 return ts.updateCatchClause(node, visitNode(node.variableDeclaration, visitor, ts.isVariableDeclaration), visitNode(node.block, visitor, ts.isBlock));
-            // Property assignments
-            case 270 /* PropertyAssignment */:
+            case 270:
                 return ts.updatePropertyAssignment(node, visitNode(node.name, visitor, ts.isPropertyName), visitNode(node.initializer, visitor, ts.isExpression));
-            case 271 /* ShorthandPropertyAssignment */:
+            case 271:
                 return ts.updateShorthandPropertyAssignment(node, visitNode(node.name, visitor, ts.isIdentifier), visitNode(node.objectAssignmentInitializer, visitor, ts.isExpression));
-            case 272 /* SpreadAssignment */:
+            case 272:
                 return ts.updateSpreadAssignment(node, visitNode(node.expression, visitor, ts.isExpression));
-            // Enum
-            case 273 /* EnumMember */:
+            case 273:
                 return ts.updateEnumMember(node, visitNode(node.name, visitor, ts.isPropertyName), visitNode(node.initializer, visitor, ts.isExpression));
-            // Top-level nodes
-            case 274 /* SourceFile */:
+            case 274:
                 return ts.updateSourceFileNode(node, visitLexicalEnvironment(node.statements, visitor, context));
-            // Transformation nodes
-            case 301 /* PartiallyEmittedExpression */:
+            case 301:
                 return ts.updatePartiallyEmittedExpression(node, visitNode(node.expression, visitor, ts.isExpression));
-            case 302 /* CommaListExpression */:
+            case 302:
                 return ts.updateCommaList(node, nodesVisitor(node.elements, visitor, ts.isExpression));
             default:
-                // No need to visit nodes with no children.
                 return node;
         }
     }
     ts.visitEachChild = visitEachChild;
-    /**
-     * Extracts the single node from a NodeArray.
-     *
-     * @param nodes The NodeArray.
-     */
     function extractSingleNode(nodes) {
         ts.Debug.assert(nodes.length <= 1, "Too many nodes written to output.");
         return ts.singleOrUndefined(nodes);
     }
 })(ts || (ts = {}));
-/* @internal */
 (function (ts) {
     function reduceNode(node, f, initial) {
         return node ? f(initial, node) : initial;
@@ -59771,14 +49930,6 @@ var ts;
     function reduceNodeArray(nodes, f, initial) {
         return nodes ? f(initial, nodes) : initial;
     }
-    /**
-     * Similar to `reduceLeft`, performs a reduction against each child of a node.
-     * NOTE: Unlike `forEachChild`, this does *not* visit every node.
-     *
-     * @param node The node containing the children to reduce.
-     * @param initial The initial value to supply to the reduction.
-     * @param f The callback function
-     */
     function reduceEachChild(node, initial, cbNode, cbNodeArray) {
         if (node === undefined) {
             return initial;
@@ -59786,59 +49937,52 @@ var ts;
         var reduceNodes = cbNodeArray ? reduceNodeArray : ts.reduceLeft;
         var cbNodes = cbNodeArray || cbNode;
         var kind = node.kind;
-        // No need to visit nodes with no children.
-        if ((kind > 0 /* FirstToken */ && kind <= 145 /* LastToken */)) {
+        if ((kind > 0 && kind <= 145)) {
             return initial;
         }
-        // We do not yet support types.
-        if ((kind >= 161 /* TypePredicate */ && kind <= 178 /* LiteralType */)) {
+        if ((kind >= 161 && kind <= 178)) {
             return initial;
         }
         var result = initial;
         switch (node.kind) {
-            // Leaf nodes
-            case 212 /* SemicolonClassElement */:
-            case 215 /* EmptyStatement */:
-            case 206 /* OmittedExpression */:
-            case 231 /* DebuggerStatement */:
-            case 300 /* NotEmittedStatement */:
-                // No need to visit nodes with no children.
+            case 212:
+            case 215:
+            case 206:
+            case 231:
+            case 300:
                 break;
-            // Names
-            case 146 /* QualifiedName */:
+            case 146:
                 result = reduceNode(node.left, cbNode, result);
                 result = reduceNode(node.right, cbNode, result);
                 break;
-            case 147 /* ComputedPropertyName */:
+            case 147:
                 result = reduceNode(node.expression, cbNode, result);
                 break;
-            // Signature elements
-            case 149 /* Parameter */:
+            case 149:
                 result = reduceNodes(node.decorators, cbNodes, result);
                 result = reduceNodes(node.modifiers, cbNodes, result);
                 result = reduceNode(node.name, cbNode, result);
                 result = reduceNode(node.type, cbNode, result);
                 result = reduceNode(node.initializer, cbNode, result);
                 break;
-            case 150 /* Decorator */:
+            case 150:
                 result = reduceNode(node.expression, cbNode, result);
                 break;
-            // Type member
-            case 151 /* PropertySignature */:
+            case 151:
                 result = reduceNodes(node.modifiers, cbNodes, result);
                 result = reduceNode(node.name, cbNode, result);
                 result = reduceNode(node.questionToken, cbNode, result);
                 result = reduceNode(node.type, cbNode, result);
                 result = reduceNode(node.initializer, cbNode, result);
                 break;
-            case 152 /* PropertyDeclaration */:
+            case 152:
                 result = reduceNodes(node.decorators, cbNodes, result);
                 result = reduceNodes(node.modifiers, cbNodes, result);
                 result = reduceNode(node.name, cbNode, result);
                 result = reduceNode(node.type, cbNode, result);
                 result = reduceNode(node.initializer, cbNode, result);
                 break;
-            case 154 /* MethodDeclaration */:
+            case 154:
                 result = reduceNodes(node.decorators, cbNodes, result);
                 result = reduceNodes(node.modifiers, cbNodes, result);
                 result = reduceNode(node.name, cbNode, result);
@@ -59847,12 +49991,12 @@ var ts;
                 result = reduceNode(node.type, cbNode, result);
                 result = reduceNode(node.body, cbNode, result);
                 break;
-            case 155 /* Constructor */:
+            case 155:
                 result = reduceNodes(node.modifiers, cbNodes, result);
                 result = reduceNodes(node.parameters, cbNodes, result);
                 result = reduceNode(node.body, cbNode, result);
                 break;
-            case 156 /* GetAccessor */:
+            case 156:
                 result = reduceNodes(node.decorators, cbNodes, result);
                 result = reduceNodes(node.modifiers, cbNodes, result);
                 result = reduceNode(node.name, cbNode, result);
@@ -59860,57 +50004,55 @@ var ts;
                 result = reduceNode(node.type, cbNode, result);
                 result = reduceNode(node.body, cbNode, result);
                 break;
-            case 157 /* SetAccessor */:
+            case 157:
                 result = reduceNodes(node.decorators, cbNodes, result);
                 result = reduceNodes(node.modifiers, cbNodes, result);
                 result = reduceNode(node.name, cbNode, result);
                 result = reduceNodes(node.parameters, cbNodes, result);
                 result = reduceNode(node.body, cbNode, result);
                 break;
-            // Binding patterns
-            case 180 /* ObjectBindingPattern */:
-            case 181 /* ArrayBindingPattern */:
+            case 180:
+            case 181:
                 result = reduceNodes(node.elements, cbNodes, result);
                 break;
-            case 182 /* BindingElement */:
+            case 182:
                 result = reduceNode(node.propertyName, cbNode, result);
                 result = reduceNode(node.name, cbNode, result);
                 result = reduceNode(node.initializer, cbNode, result);
                 break;
-            // Expression
-            case 183 /* ArrayLiteralExpression */:
+            case 183:
                 result = reduceNodes(node.elements, cbNodes, result);
                 break;
-            case 184 /* ObjectLiteralExpression */:
+            case 184:
                 result = reduceNodes(node.properties, cbNodes, result);
                 break;
-            case 185 /* PropertyAccessExpression */:
+            case 185:
                 result = reduceNode(node.expression, cbNode, result);
                 result = reduceNode(node.name, cbNode, result);
                 break;
-            case 186 /* ElementAccessExpression */:
+            case 186:
                 result = reduceNode(node.expression, cbNode, result);
                 result = reduceNode(node.argumentExpression, cbNode, result);
                 break;
-            case 187 /* CallExpression */:
+            case 187:
                 result = reduceNode(node.expression, cbNode, result);
                 result = reduceNodes(node.typeArguments, cbNodes, result);
                 result = reduceNodes(node.arguments, cbNodes, result);
                 break;
-            case 188 /* NewExpression */:
+            case 188:
                 result = reduceNode(node.expression, cbNode, result);
                 result = reduceNodes(node.typeArguments, cbNodes, result);
                 result = reduceNodes(node.arguments, cbNodes, result);
                 break;
-            case 189 /* TaggedTemplateExpression */:
+            case 189:
                 result = reduceNode(node.tag, cbNode, result);
                 result = reduceNode(node.template, cbNode, result);
                 break;
-            case 190 /* TypeAssertionExpression */:
+            case 190:
                 result = reduceNode(node.type, cbNode, result);
                 result = reduceNode(node.expression, cbNode, result);
                 break;
-            case 192 /* FunctionExpression */:
+            case 192:
                 result = reduceNodes(node.modifiers, cbNodes, result);
                 result = reduceNode(node.name, cbNode, result);
                 result = reduceNodes(node.typeParameters, cbNodes, result);
@@ -59918,123 +50060,121 @@ var ts;
                 result = reduceNode(node.type, cbNode, result);
                 result = reduceNode(node.body, cbNode, result);
                 break;
-            case 193 /* ArrowFunction */:
+            case 193:
                 result = reduceNodes(node.modifiers, cbNodes, result);
                 result = reduceNodes(node.typeParameters, cbNodes, result);
                 result = reduceNodes(node.parameters, cbNodes, result);
                 result = reduceNode(node.type, cbNode, result);
                 result = reduceNode(node.body, cbNode, result);
                 break;
-            case 191 /* ParenthesizedExpression */:
-            case 194 /* DeleteExpression */:
-            case 195 /* TypeOfExpression */:
-            case 196 /* VoidExpression */:
-            case 197 /* AwaitExpression */:
-            case 203 /* YieldExpression */:
-            case 204 /* SpreadElement */:
-            case 209 /* NonNullExpression */:
+            case 191:
+            case 194:
+            case 195:
+            case 196:
+            case 197:
+            case 203:
+            case 204:
+            case 209:
                 result = reduceNode(node.expression, cbNode, result);
                 break;
-            case 198 /* PrefixUnaryExpression */:
-            case 199 /* PostfixUnaryExpression */:
+            case 198:
+            case 199:
                 result = reduceNode(node.operand, cbNode, result);
                 break;
-            case 200 /* BinaryExpression */:
+            case 200:
                 result = reduceNode(node.left, cbNode, result);
                 result = reduceNode(node.right, cbNode, result);
                 break;
-            case 201 /* ConditionalExpression */:
+            case 201:
                 result = reduceNode(node.condition, cbNode, result);
                 result = reduceNode(node.whenTrue, cbNode, result);
                 result = reduceNode(node.whenFalse, cbNode, result);
                 break;
-            case 202 /* TemplateExpression */:
+            case 202:
                 result = reduceNode(node.head, cbNode, result);
                 result = reduceNodes(node.templateSpans, cbNodes, result);
                 break;
-            case 205 /* ClassExpression */:
+            case 205:
                 result = reduceNodes(node.modifiers, cbNodes, result);
                 result = reduceNode(node.name, cbNode, result);
                 result = reduceNodes(node.typeParameters, cbNodes, result);
                 result = reduceNodes(node.heritageClauses, cbNodes, result);
                 result = reduceNodes(node.members, cbNodes, result);
                 break;
-            case 207 /* ExpressionWithTypeArguments */:
+            case 207:
                 result = reduceNode(node.expression, cbNode, result);
                 result = reduceNodes(node.typeArguments, cbNodes, result);
                 break;
-            case 208 /* AsExpression */:
+            case 208:
                 result = reduceNode(node.expression, cbNode, result);
                 result = reduceNode(node.type, cbNode, result);
                 break;
-            // Misc
-            case 211 /* TemplateSpan */:
+            case 211:
                 result = reduceNode(node.expression, cbNode, result);
                 result = reduceNode(node.literal, cbNode, result);
                 break;
-            // Element
-            case 213 /* Block */:
+            case 213:
                 result = reduceNodes(node.statements, cbNodes, result);
                 break;
-            case 214 /* VariableStatement */:
+            case 214:
                 result = reduceNodes(node.modifiers, cbNodes, result);
                 result = reduceNode(node.declarationList, cbNode, result);
                 break;
-            case 216 /* ExpressionStatement */:
+            case 216:
                 result = reduceNode(node.expression, cbNode, result);
                 break;
-            case 217 /* IfStatement */:
+            case 217:
                 result = reduceNode(node.expression, cbNode, result);
                 result = reduceNode(node.thenStatement, cbNode, result);
                 result = reduceNode(node.elseStatement, cbNode, result);
                 break;
-            case 218 /* DoStatement */:
+            case 218:
                 result = reduceNode(node.statement, cbNode, result);
                 result = reduceNode(node.expression, cbNode, result);
                 break;
-            case 219 /* WhileStatement */:
-            case 226 /* WithStatement */:
+            case 219:
+            case 226:
                 result = reduceNode(node.expression, cbNode, result);
                 result = reduceNode(node.statement, cbNode, result);
                 break;
-            case 220 /* ForStatement */:
+            case 220:
                 result = reduceNode(node.initializer, cbNode, result);
                 result = reduceNode(node.condition, cbNode, result);
                 result = reduceNode(node.incrementor, cbNode, result);
                 result = reduceNode(node.statement, cbNode, result);
                 break;
-            case 221 /* ForInStatement */:
-            case 222 /* ForOfStatement */:
+            case 221:
+            case 222:
                 result = reduceNode(node.initializer, cbNode, result);
                 result = reduceNode(node.expression, cbNode, result);
                 result = reduceNode(node.statement, cbNode, result);
                 break;
-            case 225 /* ReturnStatement */:
-            case 229 /* ThrowStatement */:
+            case 225:
+            case 229:
                 result = reduceNode(node.expression, cbNode, result);
                 break;
-            case 227 /* SwitchStatement */:
+            case 227:
                 result = reduceNode(node.expression, cbNode, result);
                 result = reduceNode(node.caseBlock, cbNode, result);
                 break;
-            case 228 /* LabeledStatement */:
+            case 228:
                 result = reduceNode(node.label, cbNode, result);
                 result = reduceNode(node.statement, cbNode, result);
                 break;
-            case 230 /* TryStatement */:
+            case 230:
                 result = reduceNode(node.tryBlock, cbNode, result);
                 result = reduceNode(node.catchClause, cbNode, result);
                 result = reduceNode(node.finallyBlock, cbNode, result);
                 break;
-            case 232 /* VariableDeclaration */:
+            case 232:
                 result = reduceNode(node.name, cbNode, result);
                 result = reduceNode(node.type, cbNode, result);
                 result = reduceNode(node.initializer, cbNode, result);
                 break;
-            case 233 /* VariableDeclarationList */:
+            case 233:
                 result = reduceNodes(node.declarations, cbNodes, result);
                 break;
-            case 234 /* FunctionDeclaration */:
+            case 234:
                 result = reduceNodes(node.decorators, cbNodes, result);
                 result = reduceNodes(node.modifiers, cbNodes, result);
                 result = reduceNode(node.name, cbNode, result);
@@ -60043,7 +50183,7 @@ var ts;
                 result = reduceNode(node.type, cbNode, result);
                 result = reduceNode(node.body, cbNode, result);
                 break;
-            case 235 /* ClassDeclaration */:
+            case 235:
                 result = reduceNodes(node.decorators, cbNodes, result);
                 result = reduceNodes(node.modifiers, cbNodes, result);
                 result = reduceNode(node.name, cbNode, result);
@@ -60051,139 +50191,131 @@ var ts;
                 result = reduceNodes(node.heritageClauses, cbNodes, result);
                 result = reduceNodes(node.members, cbNodes, result);
                 break;
-            case 238 /* EnumDeclaration */:
+            case 238:
                 result = reduceNodes(node.decorators, cbNodes, result);
                 result = reduceNodes(node.modifiers, cbNodes, result);
                 result = reduceNode(node.name, cbNode, result);
                 result = reduceNodes(node.members, cbNodes, result);
                 break;
-            case 239 /* ModuleDeclaration */:
+            case 239:
                 result = reduceNodes(node.decorators, cbNodes, result);
                 result = reduceNodes(node.modifiers, cbNodes, result);
                 result = reduceNode(node.name, cbNode, result);
                 result = reduceNode(node.body, cbNode, result);
                 break;
-            case 240 /* ModuleBlock */:
+            case 240:
                 result = reduceNodes(node.statements, cbNodes, result);
                 break;
-            case 241 /* CaseBlock */:
+            case 241:
                 result = reduceNodes(node.clauses, cbNodes, result);
                 break;
-            case 243 /* ImportEqualsDeclaration */:
+            case 243:
                 result = reduceNodes(node.decorators, cbNodes, result);
                 result = reduceNodes(node.modifiers, cbNodes, result);
                 result = reduceNode(node.name, cbNode, result);
                 result = reduceNode(node.moduleReference, cbNode, result);
                 break;
-            case 244 /* ImportDeclaration */:
+            case 244:
                 result = reduceNodes(node.decorators, cbNodes, result);
                 result = reduceNodes(node.modifiers, cbNodes, result);
                 result = reduceNode(node.importClause, cbNode, result);
                 result = reduceNode(node.moduleSpecifier, cbNode, result);
                 break;
-            case 245 /* ImportClause */:
+            case 245:
                 result = reduceNode(node.name, cbNode, result);
                 result = reduceNode(node.namedBindings, cbNode, result);
                 break;
-            case 246 /* NamespaceImport */:
+            case 246:
                 result = reduceNode(node.name, cbNode, result);
                 break;
-            case 247 /* NamedImports */:
-            case 251 /* NamedExports */:
+            case 247:
+            case 251:
                 result = reduceNodes(node.elements, cbNodes, result);
                 break;
-            case 248 /* ImportSpecifier */:
-            case 252 /* ExportSpecifier */:
+            case 248:
+            case 252:
                 result = reduceNode(node.propertyName, cbNode, result);
                 result = reduceNode(node.name, cbNode, result);
                 break;
-            case 249 /* ExportAssignment */:
+            case 249:
                 result = ts.reduceLeft(node.decorators, cbNode, result);
                 result = ts.reduceLeft(node.modifiers, cbNode, result);
                 result = reduceNode(node.expression, cbNode, result);
                 break;
-            case 250 /* ExportDeclaration */:
+            case 250:
                 result = ts.reduceLeft(node.decorators, cbNode, result);
                 result = ts.reduceLeft(node.modifiers, cbNode, result);
                 result = reduceNode(node.exportClause, cbNode, result);
                 result = reduceNode(node.moduleSpecifier, cbNode, result);
                 break;
-            // Module references
-            case 254 /* ExternalModuleReference */:
+            case 254:
                 result = reduceNode(node.expression, cbNode, result);
                 break;
-            // JSX
-            case 255 /* JsxElement */:
+            case 255:
                 result = reduceNode(node.openingElement, cbNode, result);
                 result = ts.reduceLeft(node.children, cbNode, result);
                 result = reduceNode(node.closingElement, cbNode, result);
                 break;
-            case 259 /* JsxFragment */:
+            case 259:
                 result = reduceNode(node.openingFragment, cbNode, result);
                 result = ts.reduceLeft(node.children, cbNode, result);
                 result = reduceNode(node.closingFragment, cbNode, result);
                 break;
-            case 256 /* JsxSelfClosingElement */:
-            case 257 /* JsxOpeningElement */:
+            case 256:
+            case 257:
                 result = reduceNode(node.tagName, cbNode, result);
                 result = reduceNode(node.attributes, cbNode, result);
                 break;
-            case 263 /* JsxAttributes */:
+            case 263:
                 result = reduceNodes(node.properties, cbNodes, result);
                 break;
-            case 258 /* JsxClosingElement */:
+            case 258:
                 result = reduceNode(node.tagName, cbNode, result);
                 break;
-            case 262 /* JsxAttribute */:
+            case 262:
                 result = reduceNode(node.name, cbNode, result);
                 result = reduceNode(node.initializer, cbNode, result);
                 break;
-            case 264 /* JsxSpreadAttribute */:
+            case 264:
                 result = reduceNode(node.expression, cbNode, result);
                 break;
-            case 265 /* JsxExpression */:
+            case 265:
                 result = reduceNode(node.expression, cbNode, result);
                 break;
-            // Clauses
-            case 266 /* CaseClause */:
+            case 266:
                 result = reduceNode(node.expression, cbNode, result);
-            // falls through
-            case 267 /* DefaultClause */:
+            case 267:
                 result = reduceNodes(node.statements, cbNodes, result);
                 break;
-            case 268 /* HeritageClause */:
+            case 268:
                 result = reduceNodes(node.types, cbNodes, result);
                 break;
-            case 269 /* CatchClause */:
+            case 269:
                 result = reduceNode(node.variableDeclaration, cbNode, result);
                 result = reduceNode(node.block, cbNode, result);
                 break;
-            // Property assignments
-            case 270 /* PropertyAssignment */:
+            case 270:
                 result = reduceNode(node.name, cbNode, result);
                 result = reduceNode(node.initializer, cbNode, result);
                 break;
-            case 271 /* ShorthandPropertyAssignment */:
+            case 271:
                 result = reduceNode(node.name, cbNode, result);
                 result = reduceNode(node.objectAssignmentInitializer, cbNode, result);
                 break;
-            case 272 /* SpreadAssignment */:
+            case 272:
                 result = reduceNode(node.expression, cbNode, result);
                 break;
-            // Enum
-            case 273 /* EnumMember */:
+            case 273:
                 result = reduceNode(node.name, cbNode, result);
                 result = reduceNode(node.initializer, cbNode, result);
                 break;
-            // Top-level nodes
-            case 274 /* SourceFile */:
+            case 274:
                 result = reduceNodes(node.statements, cbNodes, result);
                 break;
-            // Transformation nodes
-            case 301 /* PartiallyEmittedExpression */:
+            case 301:
                 result = reduceNode(node.expression, cbNode, result);
                 break;
-            case 302 /* CommaListExpression */:
+            case 302:
                 result = reduceNodes(node.elements, cbNodes, result);
                 break;
             default:
@@ -60201,36 +50333,21 @@ var ts;
             : ts.prependStatements(statements, declarations);
     }
     ts.mergeLexicalEnvironment = mergeLexicalEnvironment;
-    /**
-     * Lifts a NodeArray containing only Statement nodes to a block.
-     *
-     * @param nodes The NodeArray.
-     */
     function liftToBlock(nodes) {
         Debug.assert(ts.every(nodes, ts.isStatement), "Cannot lift nodes to a Block.");
         return ts.singleOrUndefined(nodes) || ts.createBlock(nodes);
     }
     ts.liftToBlock = liftToBlock;
-    /**
-     * Aggregates the TransformFlags for a Node and its subtree.
-     */
     function aggregateTransformFlags(node) {
         aggregateTransformFlagsForNode(node);
         return node;
     }
     ts.aggregateTransformFlags = aggregateTransformFlags;
-    /**
-     * Aggregates the TransformFlags for a Node and its subtree. The flags for the subtree are
-     * computed first, then the transform flags for the current node are computed from the subtree
-     * flags and the state of the current node. Finally, the transform flags of the node are
-     * returned, excluding any flags that should not be included in its parent node's subtree
-     * flags.
-     */
     function aggregateTransformFlagsForNode(node) {
         if (node === undefined) {
-            return 0 /* None */;
+            return 0;
         }
-        if (node.transformFlags & 536870912 /* HasComputedFlags */) {
+        if (node.transformFlags & 536870912) {
             return node.transformFlags & ~ts.getTransformFlagsSubtreeExclusions(node.kind);
         }
         var subtreeFlags = aggregateTransformFlagsForSubtree(node);
@@ -60238,34 +50355,24 @@ var ts;
     }
     function aggregateTransformFlagsForNodeArray(nodes) {
         if (nodes === undefined) {
-            return 0 /* None */;
+            return 0;
         }
-        var subtreeFlags = 0 /* None */;
-        var nodeArrayFlags = 0 /* None */;
-        for (var _i = 0, nodes_2 = nodes; _i < nodes_2.length; _i++) {
-            var node = nodes_2[_i];
+        var subtreeFlags = 0;
+        var nodeArrayFlags = 0;
+        for (var _i = 0, nodes_3 = nodes; _i < nodes_3.length; _i++) {
+            var node = nodes_3[_i];
             subtreeFlags |= aggregateTransformFlagsForNode(node);
-            nodeArrayFlags |= node.transformFlags & ~536870912 /* HasComputedFlags */;
+            nodeArrayFlags |= node.transformFlags & ~536870912;
         }
-        nodes.transformFlags = nodeArrayFlags | 536870912 /* HasComputedFlags */;
+        nodes.transformFlags = nodeArrayFlags | 536870912;
         return subtreeFlags;
     }
-    /**
-     * Aggregates the transform flags for the subtree of a node.
-     */
     function aggregateTransformFlagsForSubtree(node) {
-        // We do not transform ambient declarations or types, so there is no need to
-        // recursively aggregate transform flags.
-        if (ts.hasModifier(node, 2 /* Ambient */) || (ts.isTypeNode(node) && node.kind !== 207 /* ExpressionWithTypeArguments */)) {
-            return 0 /* None */;
-        }
-        // Aggregate the transform flags of each child.
-        return reduceEachChild(node, 0 /* None */, aggregateTransformFlagsForChildNode, aggregateTransformFlagsForChildNodes);
-    }
-    /**
-     * Aggregates the TransformFlags of a child node with the TransformFlags of its
-     * siblings.
-     */
+        if (ts.hasModifier(node, 2) || (ts.isTypeNode(node) && node.kind !== 207)) {
+            return 0;
+        }
+        return reduceEachChild(node, 0, aggregateTransformFlagsForChildNode, aggregateTransformFlagsForChildNodes);
+    }
     function aggregateTransformFlagsForChildNode(transformFlags, node) {
         return transformFlags | aggregateTransformFlagsForNode(node);
     }
@@ -60279,34 +50386,30 @@ var ts;
             return Debug.fail((message || "Unexpected node.") + "\r\nNode " + ts.formatSyntaxKind(node.kind) + " was unexpected.", failBadSyntaxKind);
         }
         Debug.failBadSyntaxKind = failBadSyntaxKind;
-        Debug.assertEachNode = Debug.shouldAssert(1 /* Normal */)
+        Debug.assertEachNode = Debug.shouldAssert(1)
             ? function (nodes, test, message) { return Debug.assert(test === undefined || ts.every(nodes, test), message || "Unexpected node.", function () { return "Node array did not pass test '" + Debug.getFunctionName(test) + "'."; }, Debug.assertEachNode); }
             : ts.noop;
-        Debug.assertNode = Debug.shouldAssert(1 /* Normal */)
+        Debug.assertNode = Debug.shouldAssert(1)
             ? function (node, test, message) { return Debug.assert(test === undefined || test(node), message || "Unexpected node.", function () { return "Node " + ts.formatSyntaxKind(node.kind) + " did not pass test '" + Debug.getFunctionName(test) + "'."; }, Debug.assertNode); }
             : ts.noop;
-        Debug.assertOptionalNode = Debug.shouldAssert(1 /* Normal */)
+        Debug.assertOptionalNode = Debug.shouldAssert(1)
             ? function (node, test, message) { return Debug.assert(test === undefined || node === undefined || test(node), message || "Unexpected node.", function () { return "Node " + ts.formatSyntaxKind(node.kind) + " did not pass test '" + Debug.getFunctionName(test) + "'."; }, Debug.assertOptionalNode); }
             : ts.noop;
-        Debug.assertOptionalToken = Debug.shouldAssert(1 /* Normal */)
+        Debug.assertOptionalToken = Debug.shouldAssert(1)
             ? function (node, kind, message) { return Debug.assert(kind === undefined || node === undefined || node.kind === kind, message || "Unexpected node.", function () { return "Node " + ts.formatSyntaxKind(node.kind) + " was not a '" + ts.formatSyntaxKind(kind) + "' token."; }, Debug.assertOptionalToken); }
             : ts.noop;
-        Debug.assertMissingNode = Debug.shouldAssert(1 /* Normal */)
+        Debug.assertMissingNode = Debug.shouldAssert(1)
             ? function (node, message) { return Debug.assert(node === undefined, message || "Unexpected node.", function () { return "Node " + ts.formatSyntaxKind(node.kind) + " was unexpected'."; }, Debug.assertMissingNode); }
             : ts.noop;
-        /**
-         * Injects debug information into frequently used types.
-         */
         function enableDebugInfo() {
             if (isDebugInfoEnabled)
                 return;
-            // Add additional properties in debug mode to assist with debugging.
             Object.defineProperties(ts.objectAllocator.getSymbolConstructor().prototype, {
                 __debugFlags: { get: function () { return ts.formatSymbolFlags(this.flags); } }
             });
             Object.defineProperties(ts.objectAllocator.getTypeConstructor().prototype, {
                 __debugFlags: { get: function () { return ts.formatTypeFlags(this.flags); } },
-                __debugObjectFlags: { get: function () { return this.flags & 131072 /* Object */ ? ts.formatObjectFlags(this.objectFlags) : ""; } },
+                __debugObjectFlags: { get: function () { return this.flags & 131072 ? ts.formatObjectFlags(this.objectFlags) : ""; } },
                 __debugTypeToString: { value: function () { return this.checker.typeToString(this); } },
             });
             var nodeConstructors = [
@@ -60340,7 +50443,6 @@ var ts;
         Debug.enableDebugInfo = enableDebugInfo;
     })(Debug = ts.Debug || (ts.Debug = {}));
 })(ts || (ts = {}));
-/* @internal */
 var ts;
 (function (ts) {
     function getOriginalNodeId(node) {
@@ -60356,12 +50458,12 @@ var ts;
         return ts.some(node.elements, isNamedDefaultReference);
     }
     function isNamedDefaultReference(e) {
-        return e.propertyName !== undefined && e.propertyName.escapedText === "default" /* Default */;
+        return e.propertyName !== undefined && e.propertyName.escapedText === "default";
     }
     function chainBundle(transformSourceFile) {
         return transformSourceFileOrBundle;
         function transformSourceFileOrBundle(node) {
-            return node.kind === 274 /* SourceFile */ ? transformSourceFile(node) : transformBundle(node);
+            return node.kind === 274 ? transformSourceFile(node) : transformBundle(node);
         }
         function transformBundle(node) {
             return ts.createBundle(ts.map(node.sourceFiles, transformSourceFile), node.prepends);
@@ -60385,13 +50487,11 @@ var ts;
                 defaultRefCount++;
             }
         }
-        // Import star is required if there's default named refs mixed with non-default refs, or if theres non-default refs and it has a default import
         return (defaultRefCount > 0 && defaultRefCount !== bindings.elements.length) || (!!(bindings.elements.length - defaultRefCount) && ts.isDefaultImport(node));
     }
     ts.getImportNeedsImportStarHelper = getImportNeedsImportStarHelper;
     function getImportNeedsImportDefaultHelper(node) {
-        // Import default is needed if there's a default import or a default ref and no other refs (meaning an import star helper wasn't requested)
-        return !getImportNeedsImportStarHelper(node) && (ts.isDefaultImport(node) || (!!node.importClause && ts.isNamedImports(node.importClause.namedBindings) && containsDefaultReference(node.importClause.namedBindings))); // TODO: GH#18217
+        return !getImportNeedsImportStarHelper(node) && (ts.isDefaultImport(node) || (!!node.importClause && ts.isNamedImports(node.importClause.namedBindings) && containsDefaultReference(node.importClause.namedBindings)));
     }
     ts.getImportNeedsImportDefaultHelper = getImportNeedsImportDefaultHelper;
     function collectExternalModuleInfo(sourceFile, resolver, compilerOptions) {
@@ -60407,34 +50507,26 @@ var ts;
         for (var _i = 0, _a = sourceFile.statements; _i < _a.length; _i++) {
             var node = _a[_i];
             switch (node.kind) {
-                case 244 /* ImportDeclaration */:
-                    // import "mod"
-                    // import x from "mod"
-                    // import * as x from "mod"
-                    // import { x, y } from "mod"
+                case 244:
                     externalImports.push(node);
                     hasImportStarOrImportDefault = hasImportStarOrImportDefault || getImportNeedsImportStarHelper(node) || getImportNeedsImportDefaultHelper(node);
                     break;
-                case 243 /* ImportEqualsDeclaration */:
-                    if (node.moduleReference.kind === 254 /* ExternalModuleReference */) {
-                        // import x = require("mod")
+                case 243:
+                    if (node.moduleReference.kind === 254) {
                         externalImports.push(node);
                     }
                     break;
-                case 250 /* ExportDeclaration */:
+                case 250:
                     if (node.moduleSpecifier) {
                         if (!node.exportClause) {
-                            // export * from "mod"
                             externalImports.push(node);
                             hasExportStarsToExportValues = true;
                         }
                         else {
-                            // export { x, y } from "mod"
                             externalImports.push(node);
                         }
                     }
                     else {
-                        // export { x, y }
                         for (var _b = 0, _c = node.exportClause.elements; _b < _c.length; _b++) {
                             var specifier = _c[_b];
                             if (!uniqueExports.get(ts.idText(specifier.name))) {
@@ -60451,31 +50543,28 @@ var ts;
                         }
                     }
                     break;
-                case 249 /* ExportAssignment */:
+                case 249:
                     if (node.isExportEquals && !exportEquals) {
-                        // export = x
                         exportEquals = node;
                     }
                     break;
-                case 214 /* VariableStatement */:
-                    if (ts.hasModifier(node, 1 /* Export */)) {
+                case 214:
+                    if (ts.hasModifier(node, 1)) {
                         for (var _d = 0, _e = node.declarationList.declarations; _d < _e.length; _d++) {
                             var decl = _e[_d];
                             exportedNames = collectExportedVariableInfo(decl, uniqueExports, exportedNames);
                         }
                     }
                     break;
-                case 234 /* FunctionDeclaration */:
-                    if (ts.hasModifier(node, 1 /* Export */)) {
-                        if (ts.hasModifier(node, 512 /* Default */)) {
-                            // export default function() { }
+                case 234:
+                    if (ts.hasModifier(node, 1)) {
+                        if (ts.hasModifier(node, 512)) {
                             if (!hasExportDefault) {
                                 multiMapSparseArrayAdd(exportedBindings, getOriginalNodeId(node), ts.getDeclarationName(node));
                                 hasExportDefault = true;
                             }
                         }
                         else {
-                            // export function x() { }
                             var name = node.name;
                             if (!uniqueExports.get(ts.idText(name))) {
                                 multiMapSparseArrayAdd(exportedBindings, getOriginalNodeId(node), name);
@@ -60485,17 +50574,15 @@ var ts;
                         }
                     }
                     break;
-                case 235 /* ClassDeclaration */:
-                    if (ts.hasModifier(node, 1 /* Export */)) {
-                        if (ts.hasModifier(node, 512 /* Default */)) {
-                            // export default class { }
+                case 235:
+                    if (ts.hasModifier(node, 1)) {
+                        if (ts.hasModifier(node, 512)) {
                             if (!hasExportDefault) {
                                 multiMapSparseArrayAdd(exportedBindings, getOriginalNodeId(node), ts.getDeclarationName(node));
                                 hasExportDefault = true;
                             }
                         }
                         else {
-                            // export class x { }
                             var name = node.name;
                             if (name && !uniqueExports.get(ts.idText(name))) {
                                 multiMapSparseArrayAdd(exportedBindings, getOriginalNodeId(node), name);
@@ -60508,11 +50595,9 @@ var ts;
             }
         }
         var externalHelpersModuleName = ts.getOrCreateExternalHelpersModuleNameIfNeeded(sourceFile, compilerOptions, hasExportStarsToExportValues, hasImportStarOrImportDefault);
-        var externalHelpersImportDeclaration = externalHelpersModuleName && ts.createImportDeclaration(
-        /*decorators*/ undefined, 
-        /*modifiers*/ undefined, ts.createImportClause(/*name*/ undefined, ts.createNamespaceImport(externalHelpersModuleName)), ts.createLiteral(ts.externalHelpersModuleNameText));
+        var externalHelpersImportDeclaration = externalHelpersModuleName && ts.createImportDeclaration(undefined, undefined, ts.createImportClause(undefined, ts.createNamespaceImport(externalHelpersModuleName)), ts.createLiteral(ts.externalHelpersModuleNameText));
         if (externalHelpersImportDeclaration) {
-            ts.addEmitFlags(externalHelpersImportDeclaration, 67108864 /* NeverApplyImportHelper */);
+            ts.addEmitFlags(externalHelpersImportDeclaration, 67108864);
             externalImports.unshift(externalHelpersImportDeclaration);
         }
         return { externalImports: externalImports, exportSpecifiers: exportSpecifiers, exportEquals: exportEquals, hasExportStarsToExportValues: hasExportStarsToExportValues, exportedBindings: exportedBindings, exportedNames: exportedNames, externalHelpersImportDeclaration: externalHelpersImportDeclaration };
@@ -60536,7 +50621,6 @@ var ts;
         }
         return exportedNames;
     }
-    /** Use a sparse array as a multi-map. */
     function multiMapSparseArrayAdd(map, key, value) {
         var values = map[key];
         if (values) {
@@ -60547,22 +50631,13 @@ var ts;
         }
         return values;
     }
-    /**
-     * Used in the module transformer to check if an expression is reasonably without sideeffect,
-     *  and thus better to copy into multiple places rather than to cache in a temporary variable
-     *  - this is mostly subjective beyond the requirement that the expression not be sideeffecting
-     */
     function isSimpleCopiableExpression(expression) {
         return ts.isStringLiteralLike(expression) ||
-            expression.kind === 8 /* NumericLiteral */ ||
+            expression.kind === 8 ||
             ts.isKeyword(expression.kind) ||
             ts.isIdentifier(expression);
     }
     ts.isSimpleCopiableExpression = isSimpleCopiableExpression;
-    /**
-     * @param input Template string input strings
-     * @param args Names which need to be made file-level unique
-     */
     function helperString(input) {
         var args = [];
         for (var _i = 1; _i < arguments.length; _i++) {
@@ -60580,25 +50655,8 @@ var ts;
     }
     ts.helperString = helperString;
 })(ts || (ts = {}));
-/*@internal*/
 var ts;
 (function (ts) {
-    var FlattenLevel;
-    (function (FlattenLevel) {
-        FlattenLevel[FlattenLevel["All"] = 0] = "All";
-        FlattenLevel[FlattenLevel["ObjectRest"] = 1] = "ObjectRest";
-    })(FlattenLevel = ts.FlattenLevel || (ts.FlattenLevel = {}));
-    /**
-     * Flattens a DestructuringAssignment or a VariableDeclaration to an expression.
-     *
-     * @param node The node to flatten.
-     * @param visitor An optional visitor used to visit initializers.
-     * @param context The transformation context.
-     * @param level Indicates the extent to which flattening should occur.
-     * @param needsValue An optional value indicating whether the value from the right-hand-side of
-     * the destructuring assignment is needed as part of a larger expression.
-     * @param createAssignmentCallback An optional callback used to create the assignment expression.
-     */
     function flattenDestructuringAssignment(node, visitor, context, level, needsValue, createAssignmentCallback) {
         var location = node;
         var value;
@@ -60630,30 +50688,16 @@ var ts;
         if (value) {
             value = ts.visitNode(value, visitor, ts.isExpression);
             if (ts.isIdentifier(value) && bindingOrAssignmentElementAssignsToName(node, value.escapedText)) {
-                // If the right-hand value of the assignment is also an assignment target then
-                // we need to cache the right-hand value.
-                value = ensureIdentifier(flattenContext, value, /*reuseIdentifierExpressions*/ false, location);
+                value = ensureIdentifier(flattenContext, value, false, location);
             }
             else if (needsValue) {
-                // If the right-hand value of the destructuring assignment needs to be preserved (as
-                // is the case when the destructuring assignment is part of a larger expression),
-                // then we need to cache the right-hand value.
-                //
-                // The source map location for the assignment should point to the entire binary
-                // expression.
-                value = ensureIdentifier(flattenContext, value, /*reuseIdentifierExpressions*/ true, location);
+                value = ensureIdentifier(flattenContext, value, true, location);
             }
             else if (ts.nodeIsSynthesized(node)) {
-                // Generally, the source map location for a destructuring assignment is the root
-                // expression.
-                //
-                // However, if the root expression is synthesized (as in the case
-                // of the initializer when transforming a ForOfStatement), then the source map
-                // location should point to the right-hand value of the expression.
                 location = value;
             }
         }
-        flattenBindingOrAssignmentElement(flattenContext, node, value, location, /*skipInitializer*/ ts.isDestructuringAssignment(node));
+        flattenBindingOrAssignmentElement(flattenContext, node, value, location, ts.isDestructuringAssignment(node));
         if (value && needsValue) {
             if (!ts.some(expressions)) {
                 return value;
@@ -60662,9 +50706,7 @@ var ts;
         }
         return ts.aggregateTransformFlags(ts.inlineExpressions(expressions)) || ts.createOmittedExpression();
         function emitExpression(expression) {
-            // NOTE: this completely disables source maps, but aligns with the behavior of
-            //       `emitAssignment` in the old emitter.
-            ts.setEmitFlags(expression, 64 /* NoNestedSourceMaps */);
+            ts.setEmitFlags(expression, 64);
             ts.aggregateTransformFlags(expression);
             expressions = ts.append(expressions, expression);
         }
@@ -60679,7 +50721,7 @@ var ts;
     }
     ts.flattenDestructuringAssignment = flattenDestructuringAssignment;
     function bindingOrAssignmentElementAssignsToName(element, escapedName) {
-        var target = ts.getTargetOfBindingOrAssignmentElement(element); // TODO: GH#18217
+        var target = ts.getTargetOfBindingOrAssignmentElement(element);
         if (ts.isBindingOrAssignmentPattern(target)) {
             return bindingOrAssignmentPatternAssignsToName(target, escapedName);
         }
@@ -60698,17 +50740,6 @@ var ts;
         }
         return false;
     }
-    /**
-     * Flattens a VariableDeclaration or ParameterDeclaration to one or more variable declarations.
-     *
-     * @param node The node to flatten.
-     * @param visitor An optional visitor used to visit initializers.
-     * @param context The transformation context.
-     * @param boundValue The value bound to the declaration.
-     * @param skipInitializer A value indicating whether to ignore the initializer of `node`.
-     * @param hoistTempVariables Indicates whether temporary variables should not be recorded in-line.
-     * @param level Indicates the extent to which flattening should occur.
-     */
     function flattenDestructuringBinding(node, visitor, context, level, rval, hoistTempVariables, skipInitializer) {
         if (hoistTempVariables === void 0) { hoistTempVariables = false; }
         var pendingExpressions;
@@ -60729,19 +50760,17 @@ var ts;
         if (ts.isVariableDeclaration(node)) {
             var initializer = ts.getInitializerOfBindingOrAssignmentElement(node);
             if (initializer && ts.isIdentifier(initializer) && bindingOrAssignmentElementAssignsToName(node, initializer.escapedText)) {
-                // If the right-hand value of the assignment is also an assignment target then
-                // we need to cache the right-hand value.
-                initializer = ensureIdentifier(flattenContext, initializer, /*reuseIdentifierExpressions*/ false, initializer);
+                initializer = ensureIdentifier(flattenContext, initializer, false, initializer);
                 node = ts.updateVariableDeclaration(node, node.name, node.type, initializer);
             }
         }
         flattenBindingOrAssignmentElement(flattenContext, node, rval, node, skipInitializer);
         if (pendingExpressions) {
-            var temp = ts.createTempVariable(/*recordTempVariable*/ undefined);
+            var temp = ts.createTempVariable(undefined);
             if (hoistTempVariables) {
                 var value = ts.inlineExpressions(pendingExpressions);
                 pendingExpressions = undefined;
-                emitBindingOrAssignment(temp, value, /*location*/ undefined, /*original*/ undefined);
+                emitBindingOrAssignment(temp, value, undefined, undefined);
             }
             else {
                 context.hoistVariableDeclaration(temp);
@@ -60753,12 +50782,11 @@ var ts;
         }
         for (var _i = 0, pendingDeclarations_1 = pendingDeclarations; _i < pendingDeclarations_1.length; _i++) {
             var _a = pendingDeclarations_1[_i], pendingExpressions_1 = _a.pendingExpressions, name = _a.name, value = _a.value, location = _a.location, original = _a.original;
-            var variable = ts.createVariableDeclaration(name, 
-            /*type*/ undefined, pendingExpressions_1 ? ts.inlineExpressions(ts.append(pendingExpressions_1, value)) : value);
+            var variable = ts.createVariableDeclaration(name, undefined, pendingExpressions_1 ? ts.inlineExpressions(ts.append(pendingExpressions_1, value)) : value);
             variable.original = original;
             ts.setTextRange(variable, location);
             if (ts.isIdentifier(name)) {
-                ts.setEmitFlags(variable, 64 /* NoNestedSourceMaps */);
+                ts.setEmitFlags(variable, 64);
             }
             ts.aggregateTransformFlags(variable);
             declarations.push(variable);
@@ -60777,29 +50805,17 @@ var ts;
         }
     }
     ts.flattenDestructuringBinding = flattenDestructuringBinding;
-    /**
-     * Flattens a BindingOrAssignmentElement into zero or more bindings or assignments.
-     *
-     * @param flattenContext Options used to control flattening.
-     * @param element The element to flatten.
-     * @param value The current RHS value to assign to the element.
-     * @param location The location to use for source maps and comments.
-     * @param skipInitializer An optional value indicating whether to include the initializer
-     * for the element.
-     */
     function flattenBindingOrAssignmentElement(flattenContext, element, value, location, skipInitializer) {
         if (!skipInitializer) {
             var initializer = ts.visitNode(ts.getInitializerOfBindingOrAssignmentElement(element), flattenContext.visitor, ts.isExpression);
             if (initializer) {
-                // Combine value and initializer
                 value = value ? createDefaultValueCheck(flattenContext, value, initializer, location) : initializer;
             }
             else if (!value) {
-                // Use 'void 0' in absence of value and initializer
                 value = ts.createVoidZero();
             }
         }
-        var bindingTarget = ts.getTargetOfBindingOrAssignmentElement(element); // TODO: GH#18217
+        var bindingTarget = ts.getTargetOfBindingOrAssignmentElement(element);
         if (ts.isObjectBindingOrAssignmentPattern(bindingTarget)) {
             flattenObjectBindingOrAssignmentPattern(flattenContext, element, bindingTarget, value, location);
         }
@@ -60807,26 +50823,13 @@ var ts;
             flattenArrayBindingOrAssignmentPattern(flattenContext, element, bindingTarget, value, location);
         }
         else {
-            flattenContext.emitBindingOrAssignment(bindingTarget, value, location, /*original*/ element); // TODO: GH#18217
-        }
-    }
-    /**
-     * Flattens an ObjectBindingOrAssignmentPattern into zero or more bindings or assignments.
-     *
-     * @param flattenContext Options used to control flattening.
-     * @param parent The parent element of the pattern.
-     * @param pattern The ObjectBindingOrAssignmentPattern to flatten.
-     * @param value The current RHS value to assign to the element.
-     * @param location The location to use for source maps and comments.
-     */
+            flattenContext.emitBindingOrAssignment(bindingTarget, value, location, element);
+        }
+    }
     function flattenObjectBindingOrAssignmentPattern(flattenContext, parent, pattern, value, location) {
         var elements = ts.getElementsOfBindingOrAssignmentPattern(pattern);
         var numElements = elements.length;
         if (numElements !== 1) {
-            // For anything other than a single-element destructuring we need to generate a temporary
-            // to ensure value is evaluated exactly once. Additionally, if we have zero elements
-            // we need to emit *something* to ensure that in case a 'var' keyword was already emitted,
-            // so in that case, we'll intentionally create that temporary.
             var reuseIdentifierExpressions = !ts.isDeclarationBindingElement(parent) || numElements !== 0;
             value = ensureIdentifier(flattenContext, value, reuseIdentifierExpressions, location);
         }
@@ -60836,9 +50839,9 @@ var ts;
             var element = elements[i];
             if (!ts.getRestIndicatorOfBindingOrAssignmentElement(element)) {
                 var propertyName = ts.getPropertyNameOfBindingOrAssignmentElement(element);
-                if (flattenContext.level >= 1 /* ObjectRest */
-                    && !(element.transformFlags & (524288 /* ContainsRest */ | 1048576 /* ContainsObjectRest */))
-                    && !(ts.getTargetOfBindingOrAssignmentElement(element).transformFlags & (524288 /* ContainsRest */ | 1048576 /* ContainsObjectRest */))
+                if (flattenContext.level >= 1
+                    && !(element.transformFlags & (524288 | 1048576))
+                    && !(ts.getTargetOfBindingOrAssignmentElement(element).transformFlags & (524288 | 1048576))
                     && !ts.isComputedPropertyName(propertyName)) {
                     bindingElements = ts.append(bindingElements, element);
                 }
@@ -60851,7 +50854,7 @@ var ts;
                     if (ts.isComputedPropertyName(propertyName)) {
                         computedTempVariables = ts.append(computedTempVariables, rhsValue.argumentExpression);
                     }
-                    flattenBindingOrAssignmentElement(flattenContext, element, rhsValue, /*location*/ element);
+                    flattenBindingOrAssignmentElement(flattenContext, element, rhsValue, element);
                 }
             }
             else if (i === numElements - 1) {
@@ -60859,7 +50862,7 @@ var ts;
                     flattenContext.emitBindingOrAssignment(flattenContext.createObjectBindingOrAssignmentPattern(bindingElements), value, location, pattern);
                     bindingElements = undefined;
                 }
-                var rhsValue = createRestCall(flattenContext.context, value, elements, computedTempVariables, pattern); // TODO: GH#18217
+                var rhsValue = createRestCall(flattenContext.context, value, elements, computedTempVariables, pattern);
                 flattenBindingOrAssignmentElement(flattenContext, element, rhsValue, element);
             }
         }
@@ -60867,33 +50870,16 @@ var ts;
             flattenContext.emitBindingOrAssignment(flattenContext.createObjectBindingOrAssignmentPattern(bindingElements), value, location, pattern);
         }
     }
-    /**
-     * Flattens an ArrayBindingOrAssignmentPattern into zero or more bindings or assignments.
-     *
-     * @param flattenContext Options used to control flattening.
-     * @param parent The parent element of the pattern.
-     * @param pattern The ArrayBindingOrAssignmentPattern to flatten.
-     * @param value The current RHS value to assign to the element.
-     * @param location The location to use for source maps and comments.
-     */
     function flattenArrayBindingOrAssignmentPattern(flattenContext, parent, pattern, value, location) {
         var elements = ts.getElementsOfBindingOrAssignmentPattern(pattern);
         var numElements = elements.length;
-        if (flattenContext.level < 1 /* ObjectRest */ && flattenContext.downlevelIteration) {
-            // Read the elements of the iterable into an array
+        if (flattenContext.level < 1 && flattenContext.downlevelIteration) {
             value = ensureIdentifier(flattenContext, ts.createReadHelper(flattenContext.context, value, numElements > 0 && ts.getRestIndicatorOfBindingOrAssignmentElement(elements[numElements - 1])
                 ? undefined
-                : numElements, location), 
-            /*reuseIdentifierExpressions*/ false, location);
+                : numElements, location), false, location);
         }
-        else if (numElements !== 1 && (flattenContext.level < 1 /* ObjectRest */ || numElements === 0)
+        else if (numElements !== 1 && (flattenContext.level < 1 || numElements === 0)
             || ts.every(elements, ts.isOmittedExpression)) {
-            // For anything other than a single-element destructuring we need to generate a temporary
-            // to ensure value is evaluated exactly once. Additionally, if we have zero elements
-            // we need to emit *something* to ensure that in case a 'var' keyword was already emitted,
-            // so in that case, we'll intentionally create that temporary.
-            // Or all the elements of the binding pattern are omitted expression such as "var [,] = [1,2]",
-            // then we will create temporary variable.
             var reuseIdentifierExpressions = !ts.isDeclarationBindingElement(parent) || numElements !== 0;
             value = ensureIdentifier(flattenContext, value, reuseIdentifierExpressions, location);
         }
@@ -60901,11 +50887,9 @@ var ts;
         var restContainingElements;
         for (var i = 0; i < numElements; i++) {
             var element = elements[i];
-            if (flattenContext.level >= 1 /* ObjectRest */) {
-                // If an array pattern contains an ObjectRest, we must cache the result so that we
-                // can perform the ObjectRest destructuring in a different declaration
-                if (element.transformFlags & 1048576 /* ContainsObjectRest */) {
-                    var temp = ts.createTempVariable(/*recordTempVariable*/ undefined);
+            if (flattenContext.level >= 1) {
+                if (element.transformFlags & 1048576) {
+                    var temp = ts.createTempVariable(undefined);
                     if (flattenContext.hoistTempVariables) {
                         flattenContext.context.hoistVariableDeclaration(temp);
                     }
@@ -60921,11 +50905,11 @@ var ts;
             }
             else if (!ts.getRestIndicatorOfBindingOrAssignmentElement(element)) {
                 var rhsValue = ts.createElementAccess(value, i);
-                flattenBindingOrAssignmentElement(flattenContext, element, rhsValue, /*location*/ element);
+                flattenBindingOrAssignmentElement(flattenContext, element, rhsValue, element);
             }
             else if (i === numElements - 1) {
                 var rhsValue = ts.createArraySlice(value, i);
-                flattenBindingOrAssignmentElement(flattenContext, element, rhsValue, /*location*/ element);
+                flattenBindingOrAssignmentElement(flattenContext, element, rhsValue, element);
             }
         }
         if (bindingElements) {
@@ -60938,31 +50922,13 @@ var ts;
             }
         }
     }
-    /**
-     * Creates an expression used to provide a default value if a value is `undefined` at runtime.
-     *
-     * @param flattenContext Options used to control flattening.
-     * @param value The RHS value to test.
-     * @param defaultValue The default value to use if `value` is `undefined` at runtime.
-     * @param location The location to use for source maps and comments.
-     */
     function createDefaultValueCheck(flattenContext, value, defaultValue, location) {
-        value = ensureIdentifier(flattenContext, value, /*reuseIdentifierExpressions*/ true, location);
+        value = ensureIdentifier(flattenContext, value, true, location);
         return ts.createConditional(ts.createTypeCheck(value, "undefined"), defaultValue, value);
     }
-    /**
-     * Creates either a PropertyAccessExpression or an ElementAccessExpression for the
-     * right-hand side of a transformed destructuring assignment.
-     *
-     * @link https://tc39.github.io/ecma262/#sec-runtime-semantics-keyeddestructuringassignmentevaluation
-     *
-     * @param flattenContext Options used to control flattening.
-     * @param value The RHS value that is the source of the property.
-     * @param propertyName The destructuring property name.
-     */
     function createDestructuringPropertyAccess(flattenContext, value, propertyName) {
         if (ts.isComputedPropertyName(propertyName)) {
-            var argumentExpression = ensureIdentifier(flattenContext, ts.visitNode(propertyName.expression, flattenContext.visitor), /*reuseIdentifierExpressions*/ false, /*location*/ propertyName);
+            var argumentExpression = ensureIdentifier(flattenContext, ts.visitNode(propertyName.expression, flattenContext.visitor), false, propertyName);
             return ts.createElementAccess(value, argumentExpression);
         }
         else if (ts.isStringOrNumericLiteral(propertyName)) {
@@ -60975,29 +50941,18 @@ var ts;
             return ts.createPropertyAccess(value, name);
         }
     }
-    /**
-     * Ensures that there exists a declared identifier whose value holds the given expression.
-     * This function is useful to ensure that the expression's value can be read from in subsequent expressions.
-     * Unless 'reuseIdentifierExpressions' is false, 'value' will be returned if it is just an identifier.
-     *
-     * @param flattenContext Options used to control flattening.
-     * @param value the expression whose value needs to be bound.
-     * @param reuseIdentifierExpressions true if identifier expressions can simply be returned;
-     * false if it is necessary to always emit an identifier.
-     * @param location The location to use for source maps and comments.
-     */
     function ensureIdentifier(flattenContext, value, reuseIdentifierExpressions, location) {
         if (ts.isIdentifier(value) && reuseIdentifierExpressions) {
             return value;
         }
         else {
-            var temp = ts.createTempVariable(/*recordTempVariable*/ undefined);
+            var temp = ts.createTempVariable(undefined);
             if (flattenContext.hoistTempVariables) {
                 flattenContext.context.hoistVariableDeclaration(temp);
                 flattenContext.emitExpression(ts.setTextRange(ts.createAssignment(temp, value), location));
             }
             else {
-                flattenContext.emitBindingOrAssignment(temp, value, location, /*original*/ undefined);
+                flattenContext.emitBindingOrAssignment(temp, value, location, undefined);
             }
             return temp;
         }
@@ -61017,7 +50972,7 @@ var ts;
         return ts.createObjectLiteral(ts.map(elements, ts.convertToObjectAssignmentElement));
     }
     function makeBindingElement(name) {
-        return ts.createBindingElement(/*dotDotDotToken*/ undefined, /*propertyName*/ undefined, name);
+        return ts.createBindingElement(undefined, undefined, name);
     }
     function makeAssignmentElement(name) {
         return name;
@@ -61027,9 +50982,6 @@ var ts;
         scoped: false,
         text: "\n            var __rest = (this && this.__rest) || function (s, e) {\n                var t = {};\n                for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)\n                    t[p] = s[p];\n                if (s != null && typeof Object.getOwnPropertySymbols === \"function\")\n                    for (var i = 0, p = Object.getOwnPropertySymbols(s); i < p.length; i++) if (e.indexOf(p[i]) < 0)\n                        t[p[i]] = s[p[i]];\n                return t;\n            };"
     };
-    /** Given value: o, propName: p, pattern: { a, b, ...p } from the original statement
-     * `{ a, b, ...p } = o`, create `p = __rest(o, ["a", "b"]);`
-     */
     function createRestCall(context, value, elements, computedTempVariables, location) {
         context.requestEmitHelper(restHelper);
         var propertyNames = [];
@@ -61040,7 +50992,6 @@ var ts;
                 if (ts.isComputedPropertyName(propertyName)) {
                     var temp = computedTempVariables[computedTempVariableOffset];
                     computedTempVariableOffset++;
-                    // typeof _tmp === "symbol" ? _tmp : _tmp + ""
                     propertyNames.push(ts.createConditional(ts.createTypeCheck(temp, "symbol"), temp, ts.createAdd(temp, ts.createLiteral(""))));
                 }
                 else {
@@ -61048,45 +50999,15 @@ var ts;
                 }
             }
         }
-        return ts.createCall(ts.getHelperName("__rest"), 
-        /*typeArguments*/ undefined, [
+        return ts.createCall(ts.getHelperName("__rest"), undefined, [
             value,
             ts.setTextRange(ts.createArrayLiteral(propertyNames), location)
         ]);
     }
 })(ts || (ts = {}));
-/*@internal*/
 var ts;
 (function (ts) {
-    /**
-     * Indicates whether to emit type metadata in the new format.
-     */
     var USE_NEW_TYPE_METADATA_FORMAT = false;
-    var TypeScriptSubstitutionFlags;
-    (function (TypeScriptSubstitutionFlags) {
-        /** Enables substitutions for decorated classes. */
-        TypeScriptSubstitutionFlags[TypeScriptSubstitutionFlags["ClassAliases"] = 1] = "ClassAliases";
-        /** Enables substitutions for namespace exports. */
-        TypeScriptSubstitutionFlags[TypeScriptSubstitutionFlags["NamespaceExports"] = 2] = "NamespaceExports";
-        /* Enables substitutions for unqualified enum members */
-        TypeScriptSubstitutionFlags[TypeScriptSubstitutionFlags["NonQualifiedEnumMembers"] = 8] = "NonQualifiedEnumMembers";
-    })(TypeScriptSubstitutionFlags || (TypeScriptSubstitutionFlags = {}));
-    var ClassFacts;
-    (function (ClassFacts) {
-        ClassFacts[ClassFacts["None"] = 0] = "None";
-        ClassFacts[ClassFacts["HasStaticInitializedProperties"] = 1] = "HasStaticInitializedProperties";
-        ClassFacts[ClassFacts["HasConstructorDecorators"] = 2] = "HasConstructorDecorators";
-        ClassFacts[ClassFacts["HasMemberDecorators"] = 4] = "HasMemberDecorators";
-        ClassFacts[ClassFacts["IsExportOfNamespace"] = 8] = "IsExportOfNamespace";
-        ClassFacts[ClassFacts["IsNamedExternalExport"] = 16] = "IsNamedExternalExport";
-        ClassFacts[ClassFacts["IsDefaultExternalExport"] = 32] = "IsDefaultExternalExport";
-        ClassFacts[ClassFacts["IsDerivedClass"] = 64] = "IsDerivedClass";
-        ClassFacts[ClassFacts["UseImmediatelyInvokedFunctionExpression"] = 128] = "UseImmediatelyInvokedFunctionExpression";
-        ClassFacts[ClassFacts["HasAnyDecorators"] = 6] = "HasAnyDecorators";
-        ClassFacts[ClassFacts["NeedsName"] = 5] = "NeedsName";
-        ClassFacts[ClassFacts["MayNeedImmediatelyInvokedFunctionExpression"] = 7] = "MayNeedImmediatelyInvokedFunctionExpression";
-        ClassFacts[ClassFacts["IsExported"] = 56] = "IsExported";
-    })(ClassFacts || (ClassFacts = {}));
     function transformTypeScript(context) {
         var startLexicalEnvironment = context.startLexicalEnvironment, resumeLexicalEnvironment = context.resumeLexicalEnvironment, endLexicalEnvironment = context.endLexicalEnvironment, hoistVariableDeclaration = context.hoistVariableDeclaration;
         var resolver = context.getEmitResolver();
@@ -61094,61 +51015,36 @@ var ts;
         var strictNullChecks = ts.getStrictOptionValue(compilerOptions, "strictNullChecks");
         var languageVersion = ts.getEmitScriptTarget(compilerOptions);
         var moduleKind = ts.getEmitModuleKind(compilerOptions);
-        // Save the previous transformation hooks.
         var previousOnEmitNode = context.onEmitNode;
         var previousOnSubstituteNode = context.onSubstituteNode;
-        // Set new transformation hooks.
         context.onEmitNode = onEmitNode;
         context.onSubstituteNode = onSubstituteNode;
-        // Enable substitution for property/element access to emit const enum values.
-        context.enableSubstitution(185 /* PropertyAccessExpression */);
-        context.enableSubstitution(186 /* ElementAccessExpression */);
-        // These variables contain state that changes as we descend into the tree.
+        context.enableSubstitution(185);
+        context.enableSubstitution(186);
         var currentSourceFile;
         var currentNamespace;
         var currentNamespaceContainerName;
         var currentScope;
         var currentScopeFirstDeclarationsOfName;
-        /**
-         * Keeps track of whether expression substitution has been enabled for specific edge cases.
-         * They are persisted between each SourceFile transformation and should not be reset.
-         */
         var enabledSubstitutions;
-        /**
-         * A map that keeps track of aliases created for classes with decorators to avoid issues
-         * with the double-binding behavior of classes.
-         */
         var classAliases;
-        /**
-         * Keeps track of whether we are within any containing namespaces when performing
-         * just-in-time substitution while printing an expression identifier.
-         */
         var applicableSubstitutions;
-        /**
-         * Tracks what computed name expressions originating from elided names must be inlined
-         * at the next execution site, in document order
-         */
         var pendingExpressions;
         return transformSourceFileOrBundle;
         function transformSourceFileOrBundle(node) {
-            if (node.kind === 275 /* Bundle */) {
+            if (node.kind === 275) {
                 return transformBundle(node);
             }
             return transformSourceFile(node);
         }
         function transformBundle(node) {
             return ts.createBundle(node.sourceFiles.map(transformSourceFile), ts.mapDefined(node.prepends, function (prepend) {
-                if (prepend.kind === 277 /* InputFiles */) {
+                if (prepend.kind === 277) {
                     return ts.createUnparsedSourceFile(prepend.javascriptText, prepend.javascriptMapText);
                 }
                 return prepend;
             }));
         }
-        /**
-         * Transform TypeScript-specific syntax in a SourceFile.
-         *
-         * @param node A SourceFile node.
-         */
         function transformSourceFile(node) {
             if (node.isDeclarationFile) {
                 return node;
@@ -61159,100 +51055,61 @@ var ts;
             currentSourceFile = undefined;
             return visited;
         }
-        /**
-         * Visits a node, saving and restoring state variables on the stack.
-         *
-         * @param node The node to visit.
-         */
         function saveStateAndInvoke(node, f) {
-            // Save state
             var savedCurrentScope = currentScope;
             var savedCurrentScopeFirstDeclarationsOfName = currentScopeFirstDeclarationsOfName;
-            // Handle state changes before visiting a node.
             onBeforeVisitNode(node);
             var visited = f(node);
-            // Restore state
             if (currentScope !== savedCurrentScope) {
                 currentScopeFirstDeclarationsOfName = savedCurrentScopeFirstDeclarationsOfName;
             }
             currentScope = savedCurrentScope;
             return visited;
         }
-        /**
-         * Performs actions that should always occur immediately before visiting a node.
-         *
-         * @param node The node to visit.
-         */
         function onBeforeVisitNode(node) {
             switch (node.kind) {
-                case 274 /* SourceFile */:
-                case 241 /* CaseBlock */:
-                case 240 /* ModuleBlock */:
-                case 213 /* Block */:
+                case 274:
+                case 241:
+                case 240:
+                case 213:
                     currentScope = node;
                     currentScopeFirstDeclarationsOfName = undefined;
                     break;
-                case 235 /* ClassDeclaration */:
-                case 234 /* FunctionDeclaration */:
-                    if (ts.hasModifier(node, 2 /* Ambient */)) {
+                case 235:
+                case 234:
+                    if (ts.hasModifier(node, 2)) {
                         break;
                     }
-                    // Record these declarations provided that they have a name.
                     if (node.name) {
                         recordEmittedDeclarationInScope(node);
                     }
                     else {
-                        // These nodes should always have names unless they are default-exports;
-                        // however, class declaration parsing allows for undefined names, so syntactically invalid
-                        // programs may also have an undefined name.
-                        ts.Debug.assert(node.kind === 235 /* ClassDeclaration */ || ts.hasModifier(node, 512 /* Default */));
+                        ts.Debug.assert(node.kind === 235 || ts.hasModifier(node, 512));
                     }
                     break;
             }
         }
-        /**
-         * General-purpose node visitor.
-         *
-         * @param node The node to visit.
-         */
         function visitor(node) {
             return saveStateAndInvoke(node, visitorWorker);
         }
-        /**
-         * Visits and possibly transforms any node.
-         *
-         * @param node The node to visit.
-         */
         function visitorWorker(node) {
-            if (node.transformFlags & 1 /* TypeScript */) {
-                // This node is explicitly marked as TypeScript, so we should transform the node.
+            if (node.transformFlags & 1) {
                 return visitTypeScript(node);
             }
-            else if (node.transformFlags & 2 /* ContainsTypeScript */) {
-                // This node contains TypeScript, so we should visit its children.
+            else if (node.transformFlags & 2) {
                 return ts.visitEachChild(node, visitor, context);
             }
             return node;
         }
-        /**
-         * Specialized visitor that visits the immediate children of a SourceFile.
-         *
-         * @param node The node to visit.
-         */
         function sourceElementVisitor(node) {
             return saveStateAndInvoke(node, sourceElementVisitorWorker);
         }
-        /**
-         * Specialized visitor that visits the immediate children of a SourceFile.
-         *
-         * @param node The node to visit.
-         */
         function sourceElementVisitorWorker(node) {
             switch (node.kind) {
-                case 244 /* ImportDeclaration */:
-                case 243 /* ImportEqualsDeclaration */:
-                case 249 /* ExportAssignment */:
-                case 250 /* ExportDeclaration */:
+                case 244:
+                case 243:
+                case 249:
+                case 250:
                     return visitEllidableStatement(node);
                 default:
                     return visitorWorker(node);
@@ -61261,265 +51118,168 @@ var ts;
         function visitEllidableStatement(node) {
             var parsed = ts.getParseTreeNode(node);
             if (parsed !== node) {
-                // If the node has been transformed by a `before` transformer, perform no ellision on it
-                // As the type information we would attempt to lookup to perform ellision is potentially unavailable for the synthesized nodes
-                // We do not reuse `visitorWorker`, as the ellidable statement syntax kinds are technically unrecognized by the switch-case in `visitTypeScript`,
-                // and will trigger debug failures when debug verbosity is turned up
-                if (node.transformFlags & 2 /* ContainsTypeScript */) {
-                    // This node contains TypeScript, so we should visit its children.
+                if (node.transformFlags & 2) {
                     return ts.visitEachChild(node, visitor, context);
                 }
-                // Otherwise, we can just return the node
                 return node;
             }
             switch (node.kind) {
-                case 244 /* ImportDeclaration */:
+                case 244:
                     return visitImportDeclaration(node);
-                case 243 /* ImportEqualsDeclaration */:
+                case 243:
                     return visitImportEqualsDeclaration(node);
-                case 249 /* ExportAssignment */:
+                case 249:
                     return visitExportAssignment(node);
-                case 250 /* ExportDeclaration */:
+                case 250:
                     return visitExportDeclaration(node);
                 default:
                     ts.Debug.fail("Unhandled ellided statement");
             }
         }
-        /**
-         * Specialized visitor that visits the immediate children of a namespace.
-         *
-         * @param node The node to visit.
-         */
         function namespaceElementVisitor(node) {
             return saveStateAndInvoke(node, namespaceElementVisitorWorker);
         }
-        /**
-         * Specialized visitor that visits the immediate children of a namespace.
-         *
-         * @param node The node to visit.
-         */
         function namespaceElementVisitorWorker(node) {
-            if (node.kind === 250 /* ExportDeclaration */ ||
-                node.kind === 244 /* ImportDeclaration */ ||
-                node.kind === 245 /* ImportClause */ ||
-                (node.kind === 243 /* ImportEqualsDeclaration */ &&
-                    node.moduleReference.kind === 254 /* ExternalModuleReference */)) {
-                // do not emit ES6 imports and exports since they are illegal inside a namespace
+            if (node.kind === 250 ||
+                node.kind === 244 ||
+                node.kind === 245 ||
+                (node.kind === 243 &&
+                    node.moduleReference.kind === 254)) {
                 return undefined;
             }
-            else if (node.transformFlags & 1 /* TypeScript */ || ts.hasModifier(node, 1 /* Export */)) {
-                // This node is explicitly marked as TypeScript, or is exported at the namespace
-                // level, so we should transform the node.
+            else if (node.transformFlags & 1 || ts.hasModifier(node, 1)) {
                 return visitTypeScript(node);
             }
-            else if (node.transformFlags & 2 /* ContainsTypeScript */) {
-                // This node contains TypeScript, so we should visit its children.
+            else if (node.transformFlags & 2) {
                 return ts.visitEachChild(node, visitor, context);
             }
             return node;
         }
-        /**
-         * Specialized visitor that visits the immediate children of a class with TypeScript syntax.
-         *
-         * @param node The node to visit.
-         */
         function classElementVisitor(node) {
             return saveStateAndInvoke(node, classElementVisitorWorker);
         }
-        /**
-         * Specialized visitor that visits the immediate children of a class with TypeScript syntax.
-         *
-         * @param node The node to visit.
-         */
         function classElementVisitorWorker(node) {
             switch (node.kind) {
-                case 155 /* Constructor */:
-                    // TypeScript constructors are transformed in `visitClassDeclaration`.
-                    // We elide them here as `visitorWorker` checks transform flags, which could
-                    // erronously include an ES6 constructor without TypeScript syntax.
+                case 155:
                     return undefined;
-                case 152 /* PropertyDeclaration */:
-                case 160 /* IndexSignature */:
-                case 156 /* GetAccessor */:
-                case 157 /* SetAccessor */:
-                case 154 /* MethodDeclaration */:
-                    // Fallback to the default visit behavior.
+                case 152:
+                case 160:
+                case 156:
+                case 157:
+                case 154:
                     return visitorWorker(node);
-                case 212 /* SemicolonClassElement */:
+                case 212:
                     return node;
                 default:
                     return ts.Debug.failBadSyntaxKind(node);
             }
         }
         function modifierVisitor(node) {
-            if (ts.modifierToFlag(node.kind) & 2270 /* TypeScriptModifier */) {
+            if (ts.modifierToFlag(node.kind) & 2270) {
                 return undefined;
             }
-            else if (currentNamespace && node.kind === 84 /* ExportKeyword */) {
+            else if (currentNamespace && node.kind === 84) {
                 return undefined;
             }
             return node;
         }
-        /**
-         * Branching visitor, visits a TypeScript syntax node.
-         *
-         * @param node The node to visit.
-         */
         function visitTypeScript(node) {
-            if (ts.hasModifier(node, 2 /* Ambient */) && ts.isStatement(node)) {
-                // TypeScript ambient declarations are elided, but some comments may be preserved.
-                // See the implementation of `getLeadingComments` in comments.ts for more details.
+            if (ts.hasModifier(node, 2) && ts.isStatement(node)) {
                 return ts.createNotEmittedStatement(node);
             }
             switch (node.kind) {
-                case 84 /* ExportKeyword */:
-                case 79 /* DefaultKeyword */:
-                    // ES6 export and default modifiers are elided when inside a namespace.
+                case 84:
+                case 79:
                     return currentNamespace ? undefined : node;
-                case 114 /* PublicKeyword */:
-                case 112 /* PrivateKeyword */:
-                case 113 /* ProtectedKeyword */:
-                case 117 /* AbstractKeyword */:
-                case 76 /* ConstKeyword */:
-                case 124 /* DeclareKeyword */:
-                case 132 /* ReadonlyKeyword */:
-                // TypeScript accessibility and readonly modifiers are elided.
-                case 167 /* ArrayType */:
-                case 168 /* TupleType */:
-                case 166 /* TypeLiteral */:
-                case 161 /* TypePredicate */:
-                case 148 /* TypeParameter */:
-                case 119 /* AnyKeyword */:
-                case 142 /* UnknownKeyword */:
-                case 122 /* BooleanKeyword */:
-                case 137 /* StringKeyword */:
-                case 134 /* NumberKeyword */:
-                case 131 /* NeverKeyword */:
-                case 105 /* VoidKeyword */:
-                case 138 /* SymbolKeyword */:
-                case 164 /* ConstructorType */:
-                case 163 /* FunctionType */:
-                case 165 /* TypeQuery */:
-                case 162 /* TypeReference */:
-                case 169 /* UnionType */:
-                case 170 /* IntersectionType */:
-                case 171 /* ConditionalType */:
-                case 173 /* ParenthesizedType */:
-                case 174 /* ThisType */:
-                case 175 /* TypeOperator */:
-                case 176 /* IndexedAccessType */:
-                case 177 /* MappedType */:
-                case 178 /* LiteralType */:
-                // TypeScript type nodes are elided.
-                case 160 /* IndexSignature */:
-                // TypeScript index signatures are elided.
-                case 150 /* Decorator */:
-                // TypeScript decorators are elided. They will be emitted as part of visitClassDeclaration.
-                case 237 /* TypeAliasDeclaration */:
-                    // TypeScript type-only declarations are elided.
+                case 114:
+                case 112:
+                case 113:
+                case 117:
+                case 76:
+                case 124:
+                case 132:
+                case 167:
+                case 168:
+                case 166:
+                case 161:
+                case 148:
+                case 119:
+                case 142:
+                case 122:
+                case 137:
+                case 134:
+                case 131:
+                case 105:
+                case 138:
+                case 164:
+                case 163:
+                case 165:
+                case 162:
+                case 169:
+                case 170:
+                case 171:
+                case 173:
+                case 174:
+                case 175:
+                case 176:
+                case 177:
+                case 178:
+                case 160:
+                case 150:
+                case 237:
                     return undefined;
-                case 152 /* PropertyDeclaration */:
-                    // TypeScript property declarations are elided. However their names are still visited, and can potentially be retained if they could have sideeffects
+                case 152:
                     return visitPropertyDeclaration(node);
-                case 242 /* NamespaceExportDeclaration */:
-                    // TypeScript namespace export declarations are elided.
+                case 242:
                     return undefined;
-                case 155 /* Constructor */:
+                case 155:
                     return visitConstructor(node);
-                case 236 /* InterfaceDeclaration */:
-                    // TypeScript interfaces are elided, but some comments may be preserved.
-                    // See the implementation of `getLeadingComments` in comments.ts for more details.
+                case 236:
                     return ts.createNotEmittedStatement(node);
-                case 235 /* ClassDeclaration */:
-                    // This is a class declaration with TypeScript syntax extensions.
-                    //
-                    // TypeScript class syntax extensions include:
-                    // - decorators
-                    // - optional `implements` heritage clause
-                    // - parameter property assignments in the constructor
-                    // - property declarations
-                    // - index signatures
-                    // - method overload signatures
+                case 235:
                     return visitClassDeclaration(node);
-                case 205 /* ClassExpression */:
-                    // This is a class expression with TypeScript syntax extensions.
-                    //
-                    // TypeScript class syntax extensions include:
-                    // - decorators
-                    // - optional `implements` heritage clause
-                    // - parameter property assignments in the constructor
-                    // - property declarations
-                    // - index signatures
-                    // - method overload signatures
+                case 205:
                     return visitClassExpression(node);
-                case 268 /* HeritageClause */:
-                    // This is a heritage clause with TypeScript syntax extensions.
-                    //
-                    // TypeScript heritage clause extensions include:
-                    // - `implements` clause
+                case 268:
                     return visitHeritageClause(node);
-                case 207 /* ExpressionWithTypeArguments */:
-                    // TypeScript supports type arguments on an expression in an `extends` heritage clause.
+                case 207:
                     return visitExpressionWithTypeArguments(node);
-                case 154 /* MethodDeclaration */:
-                    // TypeScript method declarations may have decorators, modifiers
-                    // or type annotations.
+                case 154:
                     return visitMethodDeclaration(node);
-                case 156 /* GetAccessor */:
-                    // Get Accessors can have TypeScript modifiers, decorators, and type annotations.
+                case 156:
                     return visitGetAccessor(node);
-                case 157 /* SetAccessor */:
-                    // Set Accessors can have TypeScript modifiers and type annotations.
+                case 157:
                     return visitSetAccessor(node);
-                case 234 /* FunctionDeclaration */:
-                    // Typescript function declarations can have modifiers, decorators, and type annotations.
+                case 234:
                     return visitFunctionDeclaration(node);
-                case 192 /* FunctionExpression */:
-                    // TypeScript function expressions can have modifiers and type annotations.
+                case 192:
                     return visitFunctionExpression(node);
-                case 193 /* ArrowFunction */:
-                    // TypeScript arrow functions can have modifiers and type annotations.
+                case 193:
                     return visitArrowFunction(node);
-                case 149 /* Parameter */:
-                    // This is a parameter declaration with TypeScript syntax extensions.
-                    //
-                    // TypeScript parameter declaration syntax extensions include:
-                    // - decorators
-                    // - accessibility modifiers
-                    // - the question mark (?) token for optional parameters
-                    // - type annotations
-                    // - this parameters
+                case 149:
                     return visitParameter(node);
-                case 191 /* ParenthesizedExpression */:
-                    // ParenthesizedExpressions are TypeScript if their expression is a
-                    // TypeAssertion or AsExpression
+                case 191:
                     return visitParenthesizedExpression(node);
-                case 190 /* TypeAssertionExpression */:
-                case 208 /* AsExpression */:
-                    // TypeScript type assertions are removed, but their subtrees are preserved.
+                case 190:
+                case 208:
                     return visitAssertionExpression(node);
-                case 187 /* CallExpression */:
+                case 187:
                     return visitCallExpression(node);
-                case 188 /* NewExpression */:
+                case 188:
                     return visitNewExpression(node);
-                case 189 /* TaggedTemplateExpression */:
+                case 189:
                     return visitTaggedTemplateExpression(node);
-                case 209 /* NonNullExpression */:
-                    // TypeScript non-null expressions are removed, but their subtrees are preserved.
+                case 209:
                     return visitNonNullExpression(node);
-                case 238 /* EnumDeclaration */:
-                    // TypeScript enum declarations do not exist in ES6 and must be rewritten.
+                case 238:
                     return visitEnumDeclaration(node);
-                case 214 /* VariableStatement */:
-                    // TypeScript namespace exports for variable statements must be transformed.
+                case 214:
                     return visitVariableStatement(node);
-                case 232 /* VariableDeclaration */:
+                case 232:
                     return visitVariableDeclaration(node);
-                case 239 /* ModuleDeclaration */:
-                    // TypeScript namespace declarations must be transformed.
+                case 239:
                     return visitModuleDeclaration(node);
-                case 243 /* ImportEqualsDeclaration */:
-                    // TypeScript namespace or external module import.
+                case 243:
                     return visitImportEqualsDeclaration(node);
                 default:
                     return ts.Debug.failBadSyntaxKind(node);
@@ -61529,11 +51289,8 @@ var ts;
             var alwaysStrict = ts.getStrictOptionValue(compilerOptions, "alwaysStrict") &&
                 !(ts.isExternalModule(node) && moduleKind >= ts.ModuleKind.ES2015) &&
                 !ts.isJsonSourceFile(node);
-            return ts.updateSourceFileNode(node, ts.visitLexicalEnvironment(node.statements, sourceElementVisitor, context, /*start*/ 0, alwaysStrict));
+            return ts.updateSourceFileNode(node, ts.visitLexicalEnvironment(node.statements, sourceElementVisitor, context, 0, alwaysStrict));
         }
-        /**
-         * Tests whether we should emit a __decorate call for a class declaration.
-         */
         function shouldEmitDecorateCallForClass(node) {
             if (node.decorators && node.decorators.length > 0) {
                 return true;
@@ -61544,104 +51301,68 @@ var ts;
             }
             return false;
         }
-        /**
-         * Tests whether we should emit a __decorate call for a parameter declaration.
-         */
         function shouldEmitDecorateCallForParameter(parameter) {
             return parameter.decorators !== undefined && parameter.decorators.length > 0;
         }
         function getClassFacts(node, staticProperties) {
-            var facts = 0 /* None */;
+            var facts = 0;
             if (ts.some(staticProperties))
-                facts |= 1 /* HasStaticInitializedProperties */;
+                facts |= 1;
             var extendsClauseElement = ts.getClassExtendsHeritageClauseElement(node);
-            if (extendsClauseElement && ts.skipOuterExpressions(extendsClauseElement.expression).kind !== 95 /* NullKeyword */)
-                facts |= 64 /* IsDerivedClass */;
+            if (extendsClauseElement && ts.skipOuterExpressions(extendsClauseElement.expression).kind !== 95)
+                facts |= 64;
             if (shouldEmitDecorateCallForClass(node))
-                facts |= 2 /* HasConstructorDecorators */;
+                facts |= 2;
             if (ts.childIsDecorated(node))
-                facts |= 4 /* HasMemberDecorators */;
+                facts |= 4;
             if (isExportOfNamespace(node))
-                facts |= 8 /* IsExportOfNamespace */;
+                facts |= 8;
             else if (isDefaultExternalModuleExport(node))
-                facts |= 32 /* IsDefaultExternalExport */;
+                facts |= 32;
             else if (isNamedExternalModuleExport(node))
-                facts |= 16 /* IsNamedExternalExport */;
-            if (languageVersion <= 1 /* ES5 */ && (facts & 7 /* MayNeedImmediatelyInvokedFunctionExpression */))
-                facts |= 128 /* UseImmediatelyInvokedFunctionExpression */;
+                facts |= 16;
+            if (languageVersion <= 1 && (facts & 7))
+                facts |= 128;
             return facts;
         }
-        /**
-         * Transforms a class declaration with TypeScript syntax into compatible ES6.
-         *
-         * This function will only be called when one of the following conditions are met:
-         * - The class has decorators.
-         * - The class has property declarations with initializers.
-         * - The class contains a constructor that contains parameters with accessibility modifiers.
-         * - The class is an export in a TypeScript namespace.
-         *
-         * @param node The node to transform.
-         */
         function visitClassDeclaration(node) {
             var savedPendingExpressions = pendingExpressions;
             pendingExpressions = undefined;
-            var staticProperties = getInitializedProperties(node, /*isStatic*/ true);
+            var staticProperties = getInitializedProperties(node, true);
             var facts = getClassFacts(node, staticProperties);
-            if (facts & 128 /* UseImmediatelyInvokedFunctionExpression */) {
+            if (facts & 128) {
                 context.startLexicalEnvironment();
             }
-            var name = node.name || (facts & 5 /* NeedsName */ ? ts.getGeneratedNameForNode(node) : undefined);
-            var classStatement = facts & 2 /* HasConstructorDecorators */
+            var name = node.name || (facts & 5 ? ts.getGeneratedNameForNode(node) : undefined);
+            var classStatement = facts & 2
                 ? createClassDeclarationHeadWithDecorators(node, name, facts)
                 : createClassDeclarationHeadWithoutDecorators(node, name, facts);
             var statements = [classStatement];
-            // Write any pending expressions from elided or moved computed property names
             if (ts.some(pendingExpressions)) {
                 statements.push(ts.createStatement(ts.inlineExpressions(pendingExpressions)));
             }
             pendingExpressions = savedPendingExpressions;
-            // Emit static property assignment. Because classDeclaration is lexically evaluated,
-            // it is safe to emit static property assignment after classDeclaration
-            // From ES6 specification:
-            //      HasLexicalDeclaration (N) : Determines if the argument identifier has a binding in this environment record that was created using
-            //                                  a lexical declaration such as a LexicalDeclaration or a ClassDeclaration.
-            if (facts & 1 /* HasStaticInitializedProperties */) {
-                addInitializedPropertyStatements(statements, staticProperties, facts & 128 /* UseImmediatelyInvokedFunctionExpression */ ? ts.getInternalName(node) : ts.getLocalName(node));
-            }
-            // Write any decorators of the node.
-            addClassElementDecorationStatements(statements, node, /*isStatic*/ false);
-            addClassElementDecorationStatements(statements, node, /*isStatic*/ true);
+            if (facts & 1) {
+                addInitializedPropertyStatements(statements, staticProperties, facts & 128 ? ts.getInternalName(node) : ts.getLocalName(node));
+            }
+            addClassElementDecorationStatements(statements, node, false);
+            addClassElementDecorationStatements(statements, node, true);
             addConstructorDecorationStatement(statements, node);
-            if (facts & 128 /* UseImmediatelyInvokedFunctionExpression */) {
-                // When we emit a TypeScript class down to ES5, we must wrap it in an IIFE so that the
-                // 'es2015' transformer can properly nest static initializers and decorators. The result
-                // looks something like:
-                //
-                //  var C = function () {
-                //      class C {
-                //      }
-                //      C.static_prop = 1;
-                //      return C;
-                //  }();
-                //
-                var closingBraceLocation = ts.createTokenRange(ts.skipTrivia(currentSourceFile.text, node.members.end), 18 /* CloseBraceToken */);
+            if (facts & 128) {
+                var closingBraceLocation = ts.createTokenRange(ts.skipTrivia(currentSourceFile.text, node.members.end), 18);
                 var localName = ts.getInternalName(node);
-                // The following partially-emitted expression exists purely to align our sourcemap
-                // emit with the original emitter.
                 var outer = ts.createPartiallyEmittedExpression(localName);
                 outer.end = closingBraceLocation.end;
-                ts.setEmitFlags(outer, 1536 /* NoComments */);
+                ts.setEmitFlags(outer, 1536);
                 var statement = ts.createReturn(outer);
                 statement.pos = closingBraceLocation.pos;
-                ts.setEmitFlags(statement, 1536 /* NoComments */ | 384 /* NoTokenSourceMaps */);
+                ts.setEmitFlags(statement, 1536 | 384);
                 statements.push(statement);
                 ts.prependStatements(statements, context.endLexicalEnvironment());
                 var iife = ts.createImmediatelyInvokedArrowFunction(statements);
-                ts.setEmitFlags(iife, 33554432 /* TypeScriptClassWrapper */);
-                var varStatement = ts.createVariableStatement(
-                /*modifiers*/ undefined, ts.createVariableDeclarationList([
-                    ts.createVariableDeclaration(ts.getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ false), 
-                    /*type*/ undefined, iife)
+                ts.setEmitFlags(iife, 33554432);
+                var varStatement = ts.createVariableStatement(undefined, ts.createVariableDeclarationList([
+                    ts.createVariableDeclaration(ts.getLocalName(node, false, false), undefined, iife)
                 ]));
                 ts.setOriginalNode(varStatement, node);
                 ts.setCommentRange(varStatement, node);
@@ -61649,205 +51370,75 @@ var ts;
                 ts.startOnNewLine(varStatement);
                 statements = [varStatement];
             }
-            // If the class is exported as part of a TypeScript namespace, emit the namespace export.
-            // Otherwise, if the class was exported at the top level and was decorated, emit an export
-            // declaration or export default for the class.
-            if (facts & 8 /* IsExportOfNamespace */) {
+            if (facts & 8) {
                 addExportMemberAssignment(statements, node);
             }
-            else if (facts & 128 /* UseImmediatelyInvokedFunctionExpression */ || facts & 2 /* HasConstructorDecorators */) {
-                if (facts & 32 /* IsDefaultExternalExport */) {
-                    statements.push(ts.createExportDefault(ts.getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ true)));
+            else if (facts & 128 || facts & 2) {
+                if (facts & 32) {
+                    statements.push(ts.createExportDefault(ts.getLocalName(node, false, true)));
                 }
-                else if (facts & 16 /* IsNamedExternalExport */) {
-                    statements.push(ts.createExternalModuleExport(ts.getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ true)));
+                else if (facts & 16) {
+                    statements.push(ts.createExternalModuleExport(ts.getLocalName(node, false, true)));
                 }
             }
             if (statements.length > 1) {
-                // Add a DeclarationMarker as a marker for the end of the declaration
                 statements.push(ts.createEndOfDeclarationMarker(node));
-                ts.setEmitFlags(classStatement, ts.getEmitFlags(classStatement) | 4194304 /* HasEndOfDeclarationMarker */);
+                ts.setEmitFlags(classStatement, ts.getEmitFlags(classStatement) | 4194304);
             }
             return ts.singleOrMany(statements);
         }
-        /**
-         * Transforms a non-decorated class declaration and appends the resulting statements.
-         *
-         * @param node A ClassDeclaration node.
-         * @param name The name of the class.
-         * @param facts Precomputed facts about the class.
-         */
         function createClassDeclarationHeadWithoutDecorators(node, name, facts) {
-            //  ${modifiers} class ${name} ${heritageClauses} {
-            //      ${members}
-            //  }
-            // we do not emit modifiers on the declaration if we are emitting an IIFE
-            var modifiers = !(facts & 128 /* UseImmediatelyInvokedFunctionExpression */)
+            var modifiers = !(facts & 128)
                 ? ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier)
                 : undefined;
-            var classDeclaration = ts.createClassDeclaration(
-            /*decorators*/ undefined, modifiers, name, 
-            /*typeParameters*/ undefined, ts.visitNodes(node.heritageClauses, visitor, ts.isHeritageClause), transformClassMembers(node, (facts & 64 /* IsDerivedClass */) !== 0));
-            // To better align with the old emitter, we should not emit a trailing source map
-            // entry if the class has static properties.
+            var classDeclaration = ts.createClassDeclaration(undefined, modifiers, name, undefined, ts.visitNodes(node.heritageClauses, visitor, ts.isHeritageClause), transformClassMembers(node, (facts & 64) !== 0));
             var emitFlags = ts.getEmitFlags(node);
-            if (facts & 1 /* HasStaticInitializedProperties */) {
-                emitFlags |= 32 /* NoTrailingSourceMap */;
+            if (facts & 1) {
+                emitFlags |= 32;
             }
             ts.setTextRange(classDeclaration, node);
             ts.setOriginalNode(classDeclaration, node);
             ts.setEmitFlags(classDeclaration, emitFlags);
             return classDeclaration;
         }
-        /**
-         * Transforms a decorated class declaration and appends the resulting statements. If
-         * the class requires an alias to avoid issues with double-binding, the alias is returned.
-         */
         function createClassDeclarationHeadWithDecorators(node, name, facts) {
-            // When we emit an ES6 class that has a class decorator, we must tailor the
-            // emit to certain specific cases.
-            //
-            // In the simplest case, we emit the class declaration as a let declaration, and
-            // evaluate decorators after the close of the class body:
-            //
-            //  [Example 1]
-            //  ---------------------------------------------------------------------
-            //  TypeScript                      | Javascript
-            //  ---------------------------------------------------------------------
-            //  @dec                            | let C = class C {
-            //  class C {                       | }
-            //  }                               | C = __decorate([dec], C);
-            //  ---------------------------------------------------------------------
-            //  @dec                            | let C = class C {
-            //  export class C {                | }
-            //  }                               | C = __decorate([dec], C);
-            //                                  | export { C };
-            //  ---------------------------------------------------------------------
-            //
-            // If a class declaration contains a reference to itself *inside* of the class body,
-            // this introduces two bindings to the class: One outside of the class body, and one
-            // inside of the class body. If we apply decorators as in [Example 1] above, there
-            // is the possibility that the decorator `dec` will return a new value for the
-            // constructor, which would result in the binding inside of the class no longer
-            // pointing to the same reference as the binding outside of the class.
-            //
-            // As a result, we must instead rewrite all references to the class *inside* of the
-            // class body to instead point to a local temporary alias for the class:
-            //
-            //  [Example 2]
-            //  ---------------------------------------------------------------------
-            //  TypeScript                      | Javascript
-            //  ---------------------------------------------------------------------
-            //  @dec                            | let C = C_1 = class C {
-            //  class C {                       |   static x() { return C_1.y; }
-            //    static x() { return C.y; }    | }
-            //    static y = 1;                 | C.y = 1;
-            //  }                               | C = C_1 = __decorate([dec], C);
-            //                                  | var C_1;
-            //  ---------------------------------------------------------------------
-            //  @dec                            | let C = class C {
-            //  export class C {                |   static x() { return C_1.y; }
-            //    static x() { return C.y; }    | }
-            //    static y = 1;                 | C.y = 1;
-            //  }                               | C = C_1 = __decorate([dec], C);
-            //                                  | export { C };
-            //                                  | var C_1;
-            //  ---------------------------------------------------------------------
-            //
-            // If a class declaration is the default export of a module, we instead emit
-            // the export after the decorated declaration:
-            //
-            //  [Example 3]
-            //  ---------------------------------------------------------------------
-            //  TypeScript                      | Javascript
-            //  ---------------------------------------------------------------------
-            //  @dec                            | let default_1 = class {
-            //  export default class {          | }
-            //  }                               | default_1 = __decorate([dec], default_1);
-            //                                  | export default default_1;
-            //  ---------------------------------------------------------------------
-            //  @dec                            | let C = class C {
-            //  export default class C {        | }
-            //  }                               | C = __decorate([dec], C);
-            //                                  | export default C;
-            //  ---------------------------------------------------------------------
-            //
-            // If the class declaration is the default export and a reference to itself
-            // inside of the class body, we must emit both an alias for the class *and*
-            // move the export after the declaration:
-            //
-            //  [Example 4]
-            //  ---------------------------------------------------------------------
-            //  TypeScript                      | Javascript
-            //  ---------------------------------------------------------------------
-            //  @dec                            | let C = class C {
-            //  export default class C {        |   static x() { return C_1.y; }
-            //    static x() { return C.y; }    | }
-            //    static y = 1;                 | C.y = 1;
-            //  }                               | C = C_1 = __decorate([dec], C);
-            //                                  | export default C;
-            //                                  | var C_1;
-            //  ---------------------------------------------------------------------
-            //
             var location = ts.moveRangePastDecorators(node);
             var classAlias = getClassAliasIfNeeded(node);
-            var declName = ts.getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ true);
-            //  ... = class ${name} ${heritageClauses} {
-            //      ${members}
-            //  }
+            var declName = ts.getLocalName(node, false, true);
             var heritageClauses = ts.visitNodes(node.heritageClauses, visitor, ts.isHeritageClause);
-            var members = transformClassMembers(node, (facts & 64 /* IsDerivedClass */) !== 0);
-            var classExpression = ts.createClassExpression(/*modifiers*/ undefined, name, /*typeParameters*/ undefined, heritageClauses, members);
+            var members = transformClassMembers(node, (facts & 64) !== 0);
+            var classExpression = ts.createClassExpression(undefined, name, undefined, heritageClauses, members);
             ts.setOriginalNode(classExpression, node);
             ts.setTextRange(classExpression, location);
-            //  let ${name} = ${classExpression} where name is either declaredName if the class doesn't contain self-reference
-            //                                         or decoratedClassAlias if the class contain self-reference.
-            var statement = ts.createVariableStatement(
-            /*modifiers*/ undefined, ts.createVariableDeclarationList([
-                ts.createVariableDeclaration(declName, 
-                /*type*/ undefined, classAlias ? ts.createAssignment(classAlias, classExpression) : classExpression)
-            ], 1 /* Let */));
+            var statement = ts.createVariableStatement(undefined, ts.createVariableDeclarationList([
+                ts.createVariableDeclaration(declName, undefined, classAlias ? ts.createAssignment(classAlias, classExpression) : classExpression)
+            ], 1));
             ts.setOriginalNode(statement, node);
             ts.setTextRange(statement, location);
             ts.setCommentRange(statement, node);
             return statement;
         }
-        /**
-         * Transforms a class expression with TypeScript syntax into compatible ES6.
-         *
-         * This function will only be called when one of the following conditions are met:
-         * - The class has property declarations with initializers.
-         * - The class contains a constructor that contains parameters with accessibility modifiers.
-         *
-         * @param node The node to transform.
-         */
         function visitClassExpression(node) {
             var savedPendingExpressions = pendingExpressions;
             pendingExpressions = undefined;
-            var staticProperties = getInitializedProperties(node, /*isStatic*/ true);
+            var staticProperties = getInitializedProperties(node, true);
             var heritageClauses = ts.visitNodes(node.heritageClauses, visitor, ts.isHeritageClause);
-            var members = transformClassMembers(node, ts.some(heritageClauses, function (c) { return c.token === 85 /* ExtendsKeyword */; }));
-            var classExpression = ts.createClassExpression(
-            /*modifiers*/ undefined, node.name, 
-            /*typeParameters*/ undefined, heritageClauses, members);
+            var members = transformClassMembers(node, ts.some(heritageClauses, function (c) { return c.token === 85; }));
+            var classExpression = ts.createClassExpression(undefined, node.name, undefined, heritageClauses, members);
             ts.setOriginalNode(classExpression, node);
             ts.setTextRange(classExpression, node);
             if (ts.some(staticProperties) || ts.some(pendingExpressions)) {
                 var expressions = [];
-                var isClassWithConstructorReference = resolver.getNodeCheckFlags(node) & 8388608 /* ClassWithConstructorReference */;
+                var isClassWithConstructorReference = resolver.getNodeCheckFlags(node) & 8388608;
                 var temp = ts.createTempVariable(hoistVariableDeclaration, !!isClassWithConstructorReference);
                 if (isClassWithConstructorReference) {
-                    // record an alias as the class name is not in scope for statics.
                     enableSubstitutionForClassAliases();
                     var alias = ts.getSynthesizedClone(temp);
-                    alias.autoGenerateFlags &= ~8 /* ReservedInNestedScopes */;
+                    alias.autoGenerateFlags &= ~8;
                     classAliases[ts.getOriginalNodeId(node)] = alias;
                 }
-                // To preserve the behavior of the old emitter, we explicitly indent
-                // the body of a class with static initializers.
-                ts.setEmitFlags(classExpression, 65536 /* Indented */ | ts.getEmitFlags(classExpression));
+                ts.setEmitFlags(classExpression, 65536 | ts.getEmitFlags(classExpression));
                 expressions.push(ts.startOnNewLine(ts.createAssignment(temp, classExpression)));
-                // Add any pending expressions leftover from elided or relocated computed property names
                 ts.addRange(expressions, ts.map(pendingExpressions, ts.startOnNewLine));
                 pendingExpressions = savedPendingExpressions;
                 ts.addRange(expressions, generateInitializedPropertyExpressions(staticProperties, temp));
@@ -61857,12 +51448,6 @@ var ts;
             pendingExpressions = savedPendingExpressions;
             return classExpression;
         }
-        /**
-         * Transforms the members of a class.
-         *
-         * @param node The current class.
-         * @param isDerivedClass A value indicating whether the class has an extends clause that does not extend 'null'.
-         */
         function transformClassMembers(node, isDerivedClass) {
             var members = [];
             var constructor = transformConstructor(node, isDerivedClass);
@@ -61870,137 +51455,52 @@ var ts;
                 members.push(constructor);
             }
             ts.addRange(members, ts.visitNodes(node.members, classElementVisitor, ts.isClassElement));
-            return ts.setTextRange(ts.createNodeArray(members), /*location*/ node.members);
-        }
-        /**
-         * Transforms (or creates) a constructor for a class.
-         *
-         * @param node The current class.
-         * @param isDerivedClass A value indicating whether the class has an extends clause that does not extend 'null'.
-         */
+            return ts.setTextRange(ts.createNodeArray(members), node.members);
+        }
         function transformConstructor(node, isDerivedClass) {
-            // Check if we have property assignment inside class declaration.
-            // If there is a property assignment, we need to emit constructor whether users define it or not
-            // If there is no property assignment, we can omit constructor if users do not define it
             var hasInstancePropertyWithInitializer = ts.forEach(node.members, isInstanceInitializedProperty);
-            var hasParameterPropertyAssignments = node.transformFlags & 262144 /* ContainsParameterPropertyAssignments */;
+            var hasParameterPropertyAssignments = node.transformFlags & 262144;
             var constructor = ts.getFirstConstructorWithBody(node);
-            // If the class does not contain nodes that require a synthesized constructor,
-            // accept the current constructor if it exists.
             if (!hasInstancePropertyWithInitializer && !hasParameterPropertyAssignments) {
                 return ts.visitEachChild(constructor, visitor, context);
             }
             var parameters = transformConstructorParameters(constructor);
             var body = transformConstructorBody(node, constructor, isDerivedClass);
-            //  constructor(${parameters}) {
-            //      ${body}
-            //  }
-            return ts.startOnNewLine(ts.setOriginalNode(ts.setTextRange(ts.createConstructor(
-            /*decorators*/ undefined, 
-            /*modifiers*/ undefined, parameters, body), constructor || node), constructor));
-        }
-        /**
-         * Transforms (or creates) the parameters for the constructor of a class with
-         * parameter property assignments or instance property initializers.
-         *
-         * @param constructor The constructor declaration.
-         */
+            return ts.startOnNewLine(ts.setOriginalNode(ts.setTextRange(ts.createConstructor(undefined, undefined, parameters, body), constructor || node), constructor));
+        }
         function transformConstructorParameters(constructor) {
-            // The ES2015 spec specifies in 14.5.14. Runtime Semantics: ClassDefinitionEvaluation:
-            // If constructor is empty, then
-            //     If ClassHeritag_eopt is present and protoParent is not null, then
-            //          Let constructor be the result of parsing the source text
-            //              constructor(...args) { super (...args);}
-            //          using the syntactic grammar with the goal symbol MethodDefinition[~Yield].
-            //      Else,
-            //           Let constructor be the result of parsing the source text
-            //               constructor( ){ }
-            //           using the syntactic grammar with the goal symbol MethodDefinition[~Yield].
-            //
-            // While we could emit the '...args' rest parameter, certain later tools in the pipeline might
-            // downlevel the '...args' portion less efficiently by naively copying the contents of 'arguments' to an array.
-            // Instead, we'll avoid using a rest parameter and spread into the super call as
-            // 'super(...arguments)' instead of 'super(...args)', as you can see in "transformConstructorBody".
             return ts.visitParameterList(constructor && constructor.parameters, visitor, context)
                 || [];
         }
-        /**
-         * Transforms (or creates) a constructor body for a class with parameter property
-         * assignments or instance property initializers.
-         *
-         * @param node The current class.
-         * @param constructor The current class constructor.
-         * @param isDerivedClass A value indicating whether the class has an extends clause that does not extend 'null'.
-         */
         function transformConstructorBody(node, constructor, isDerivedClass) {
             var statements = [];
             var indexOfFirstStatement = 0;
             resumeLexicalEnvironment();
             if (constructor) {
                 indexOfFirstStatement = addPrologueDirectivesAndInitialSuperCall(constructor, statements);
-                // Add parameters with property assignments. Transforms this:
-                //
-                //  constructor (public x, public y) {
-                //  }
-                //
-                // Into this:
-                //
-                //  constructor (x, y) {
-                //      this.x = x;
-                //      this.y = y;
-                //  }
-                //
                 var propertyAssignments = getParametersWithPropertyAssignments(constructor);
                 ts.addRange(statements, ts.map(propertyAssignments, transformParameterWithPropertyAssignment));
             }
             else if (isDerivedClass) {
-                // Add a synthetic `super` call:
-                //
-                //  super(...arguments);
-                //
-                statements.push(ts.createStatement(ts.createCall(ts.createSuper(), 
-                /*typeArguments*/ undefined, [ts.createSpread(ts.createIdentifier("arguments"))])));
-            }
-            // Add the property initializers. Transforms this:
-            //
-            //  public x = 1;
-            //
-            // Into this:
-            //
-            //  constructor() {
-            //      this.x = 1;
-            //  }
-            //
-            var properties = getInitializedProperties(node, /*isStatic*/ false);
+                statements.push(ts.createStatement(ts.createCall(ts.createSuper(), undefined, [ts.createSpread(ts.createIdentifier("arguments"))])));
+            }
+            var properties = getInitializedProperties(node, false);
             addInitializedPropertyStatements(statements, properties, ts.createThis());
             if (constructor) {
-                // The class already had a constructor, so we should add the existing statements, skipping the initial super call.
                 ts.addRange(statements, ts.visitNodes(constructor.body.statements, visitor, ts.isStatement, indexOfFirstStatement));
             }
-            // End the lexical environment.
             statements = ts.mergeLexicalEnvironment(statements, endLexicalEnvironment());
-            return ts.setTextRange(ts.createBlock(ts.setTextRange(ts.createNodeArray(statements), 
-            /*location*/ constructor ? constructor.body.statements : node.members), 
-            /*multiLine*/ true), 
-            /*location*/ constructor ? constructor.body : undefined);
-        }
-        /**
-         * Adds super call and preceding prologue directives into the list of statements.
-         *
-         * @param ctor The constructor node.
-         * @returns index of the statement that follows super call
-         */
+            return ts.setTextRange(ts.createBlock(ts.setTextRange(ts.createNodeArray(statements), constructor ? constructor.body.statements : node.members), true), constructor ? constructor.body : undefined);
+        }
         function addPrologueDirectivesAndInitialSuperCall(ctor, result) {
             if (ctor.body) {
                 var statements = ctor.body.statements;
-                // add prologue directives to the list (if any)
-                var index = ts.addPrologue(result, statements, /*ensureUseStrict*/ false, visitor);
+                var index = ts.addPrologue(result, statements, false, visitor);
                 if (index === statements.length) {
-                    // list contains nothing but prologue directives (or empty) - exit
                     return index;
                 }
                 var statement = statements[index];
-                if (statement.kind === 216 /* ExpressionStatement */ && ts.isSuperCall(statement.expression)) {
+                if (statement.kind === 216 && ts.isSuperCall(statement.expression)) {
                     result.push(ts.visitNode(statement, visitor, ts.isStatement));
                     return index + 1;
                 }
@@ -62008,79 +51508,36 @@ var ts;
             }
             return 0;
         }
-        /**
-         * Gets all parameters of a constructor that should be transformed into property assignments.
-         *
-         * @param node The constructor node.
-         */
         function getParametersWithPropertyAssignments(node) {
             return ts.filter(node.parameters, isParameterWithPropertyAssignment);
         }
-        /**
-         * Determines whether a parameter should be transformed into a property assignment.
-         *
-         * @param parameter The parameter node.
-         */
         function isParameterWithPropertyAssignment(parameter) {
-            return ts.hasModifier(parameter, 92 /* ParameterPropertyModifier */)
+            return ts.hasModifier(parameter, 92)
                 && ts.isIdentifier(parameter.name);
         }
-        /**
-         * Transforms a parameter into a property assignment statement.
-         *
-         * @param node The parameter declaration.
-         */
         function transformParameterWithPropertyAssignment(node) {
             ts.Debug.assert(ts.isIdentifier(node.name));
             var name = node.name;
             var propertyName = ts.getMutableClone(name);
-            ts.setEmitFlags(propertyName, 1536 /* NoComments */ | 48 /* NoSourceMap */);
+            ts.setEmitFlags(propertyName, 1536 | 48);
             var localName = ts.getMutableClone(name);
-            ts.setEmitFlags(localName, 1536 /* NoComments */);
-            return ts.startOnNewLine(ts.setEmitFlags(ts.setTextRange(ts.createStatement(ts.createAssignment(ts.setTextRange(ts.createPropertyAccess(ts.createThis(), propertyName), node.name), localName)), ts.moveRangePos(node, -1)), 1536 /* NoComments */));
-        }
-        /**
-         * Gets all property declarations with initializers on either the static or instance side of a class.
-         *
-         * @param node The class node.
-         * @param isStatic A value indicating whether to get properties from the static or instance side of the class.
-         */
+            ts.setEmitFlags(localName, 1536);
+            return ts.startOnNewLine(ts.setEmitFlags(ts.setTextRange(ts.createStatement(ts.createAssignment(ts.setTextRange(ts.createPropertyAccess(ts.createThis(), propertyName), node.name), localName)), ts.moveRangePos(node, -1)), 1536));
+        }
         function getInitializedProperties(node, isStatic) {
             return ts.filter(node.members, isStatic ? isStaticInitializedProperty : isInstanceInitializedProperty);
         }
-        /**
-         * Gets a value indicating whether a class element is a static property declaration with an initializer.
-         *
-         * @param member The class element node.
-         */
         function isStaticInitializedProperty(member) {
-            return isInitializedProperty(member, /*isStatic*/ true);
+            return isInitializedProperty(member, true);
         }
-        /**
-         * Gets a value indicating whether a class element is an instance property declaration with an initializer.
-         *
-         * @param member The class element node.
-         */
         function isInstanceInitializedProperty(member) {
-            return isInitializedProperty(member, /*isStatic*/ false);
-        }
-        /**
-         * Gets a value indicating whether a class element is either a static or an instance property declaration with an initializer.
-         *
-         * @param member The class element node.
-         * @param isStatic A value indicating whether the member should be a static or instance member.
-         */
+            return isInitializedProperty(member, false);
+        }
         function isInitializedProperty(member, isStatic) {
-            return member.kind === 152 /* PropertyDeclaration */
-                && isStatic === ts.hasModifier(member, 32 /* Static */)
+            return member.kind === 152
+                && isStatic === ts.hasModifier(member, 32)
                 && member.initializer !== undefined;
         }
-        /**
-         * Generates assignment statements for property initializers.
-         *
-         * @param properties An array of property declarations to transform.
-         * @param receiver The receiver on which each property should be assigned.
-         */
         function addInitializedPropertyStatements(statements, properties, receiver) {
             for (var _i = 0, properties_10 = properties; _i < properties_10.length; _i++) {
                 var property = properties_10[_i];
@@ -62090,12 +51547,6 @@ var ts;
                 statements.push(statement);
             }
         }
-        /**
-         * Generates assignment expressions for property initializers.
-         *
-         * @param properties An array of property declarations to transform.
-         * @param receiver The receiver on which each property should be assigned.
-         */
         function generateInitializedPropertyExpressions(properties, receiver) {
             var expressions = [];
             for (var _i = 0, properties_11 = properties; _i < properties_11.length; _i++) {
@@ -62108,66 +51559,27 @@ var ts;
             }
             return expressions;
         }
-        /**
-         * Transforms a property initializer into an assignment statement.
-         *
-         * @param property The property declaration.
-         * @param receiver The object receiving the property assignment.
-         */
         function transformInitializedProperty(property, receiver) {
-            // We generate a name here in order to reuse the value cached by the relocated computed name expression (which uses the same generated name)
             var propertyName = ts.isComputedPropertyName(property.name) && !isSimpleInlineableExpression(property.name.expression)
                 ? ts.updateComputedPropertyName(property.name, ts.getGeneratedNameForNode(property.name))
                 : property.name;
             var initializer = ts.visitNode(property.initializer, visitor, ts.isExpression);
-            var memberAccess = ts.createMemberAccessForPropertyName(receiver, propertyName, /*location*/ propertyName);
+            var memberAccess = ts.createMemberAccessForPropertyName(receiver, propertyName, propertyName);
             return ts.createAssignment(memberAccess, initializer);
         }
-        /**
-         * Gets either the static or instance members of a class that are decorated, or have
-         * parameters that are decorated.
-         *
-         * @param node The class containing the member.
-         * @param isStatic A value indicating whether to retrieve static or instance members of
-         *                 the class.
-         */
         function getDecoratedClassElements(node, isStatic) {
             return ts.filter(node.members, isStatic ? function (m) { return isStaticDecoratedClassElement(m, node); } : function (m) { return isInstanceDecoratedClassElement(m, node); });
         }
-        /**
-         * Determines whether a class member is a static member of a class that is decorated, or
-         * has parameters that are decorated.
-         *
-         * @param member The class member.
-         */
         function isStaticDecoratedClassElement(member, parent) {
-            return isDecoratedClassElement(member, /*isStatic*/ true, parent);
-        }
-        /**
-         * Determines whether a class member is an instance member of a class that is decorated,
-         * or has parameters that are decorated.
-         *
-         * @param member The class member.
-         */
+            return isDecoratedClassElement(member, true, parent);
+        }
         function isInstanceDecoratedClassElement(member, parent) {
-            return isDecoratedClassElement(member, /*isStatic*/ false, parent);
-        }
-        /**
-         * Determines whether a class member is either a static or an instance member of a class
-         * that is decorated, or has parameters that are decorated.
-         *
-         * @param member The class member.
-         */
+            return isDecoratedClassElement(member, false, parent);
+        }
         function isDecoratedClassElement(member, isStatic, parent) {
             return ts.nodeOrChildIsDecorated(member, parent)
-                && isStatic === ts.hasModifier(member, 32 /* Static */);
-        }
-        /**
-         * Gets an array of arrays of decorators for the parameters of a function-like node.
-         * The offset into the result array should correspond to the offset of the parameter.
-         *
-         * @param node The function-like node.
-         */
+                && isStatic === ts.hasModifier(member, 32);
+        }
         function getDecoratorsOfParameters(node) {
             var decorators;
             if (node) {
@@ -62184,12 +51596,6 @@ var ts;
             }
             return decorators;
         }
-        /**
-         * Gets an AllDecorators object containing the decorators for the class and the decorators for the
-         * parameters of the constructor of the class.
-         *
-         * @param node The class node.
-         */
         function getAllDecoratorsOfConstructor(node) {
             var decorators = node.decorators;
             var parameters = getDecoratorsOfParameters(ts.getFirstConstructorWithBody(node));
@@ -62201,31 +51607,19 @@ var ts;
                 parameters: parameters
             };
         }
-        /**
-         * Gets an AllDecorators object containing the decorators for the member and its parameters.
-         *
-         * @param node The class node that contains the member.
-         * @param member The class member.
-         */
         function getAllDecoratorsOfClassElement(node, member) {
             switch (member.kind) {
-                case 156 /* GetAccessor */:
-                case 157 /* SetAccessor */:
+                case 156:
+                case 157:
                     return getAllDecoratorsOfAccessors(node, member);
-                case 154 /* MethodDeclaration */:
+                case 154:
                     return getAllDecoratorsOfMethod(member);
-                case 152 /* PropertyDeclaration */:
+                case 152:
                     return getAllDecoratorsOfProperty(member);
                 default:
                     return undefined;
             }
         }
-        /**
-         * Gets an AllDecorators object containing the decorators for the accessor and its parameters.
-         *
-         * @param node The class node that contains the accessor.
-         * @param accessor The class accessor member.
-         */
         function getAllDecoratorsOfAccessors(node, accessor) {
             if (!accessor.body) {
                 return undefined;
@@ -62242,11 +51636,6 @@ var ts;
             }
             return { decorators: decorators, parameters: parameters };
         }
-        /**
-         * Gets an AllDecorators object containing the decorators for the method and its parameters.
-         *
-         * @param method The class method member.
-         */
         function getAllDecoratorsOfMethod(method) {
             if (!method.body) {
                 return undefined;
@@ -62258,11 +51647,6 @@ var ts;
             }
             return { decorators: decorators, parameters: parameters };
         }
-        /**
-         * Gets an AllDecorators object containing the decorators for the property.
-         *
-         * @param property The class property member.
-         */
         function getAllDecoratorsOfProperty(property) {
             var decorators = property.decorators;
             if (!decorators) {
@@ -62270,12 +51654,6 @@ var ts;
             }
             return { decorators: decorators };
         }
-        /**
-         * Transforms all of the decorators for a declaration into an array of expressions.
-         *
-         * @param node The declaration node.
-         * @param allDecorators An object containing all of the decorators for the declaration.
-         */
         function transformAllDecoratorsOfDeclaration(node, container, allDecorators) {
             if (!allDecorators) {
                 return undefined;
@@ -62286,30 +51664,14 @@ var ts;
             addTypeMetadata(node, container, decoratorExpressions);
             return decoratorExpressions;
         }
-        /**
-         * Generates statements used to apply decorators to either the static or instance members
-         * of a class.
-         *
-         * @param node The class node.
-         * @param isStatic A value indicating whether to generate statements for static or
-         *                 instance members.
-         */
         function addClassElementDecorationStatements(statements, node, isStatic) {
             ts.addRange(statements, ts.map(generateClassElementDecorationExpressions(node, isStatic), expressionToStatement));
         }
-        /**
-         * Generates expressions used to apply decorators to either the static or instance members
-         * of a class.
-         *
-         * @param node The class node.
-         * @param isStatic A value indicating whether to generate expressions for static or
-         *                 instance members.
-         */
         function generateClassElementDecorationExpressions(node, isStatic) {
             var members = getDecoratedClassElements(node, isStatic);
             var expressions;
-            for (var _i = 0, members_4 = members; _i < members_4.length; _i++) {
-                var member = members_4[_i];
+            for (var _i = 0, members_5 = members; _i < members_5.length; _i++) {
+                var member = members_5[_i];
                 var expression = generateClassElementDecorationExpression(node, member);
                 if (expression) {
                     if (!expressions) {
@@ -62322,79 +51684,29 @@ var ts;
             }
             return expressions;
         }
-        /**
-         * Generates an expression used to evaluate class element decorators at runtime.
-         *
-         * @param node The class node that contains the member.
-         * @param member The class member.
-         */
         function generateClassElementDecorationExpression(node, member) {
             var allDecorators = getAllDecoratorsOfClassElement(node, member);
             var decoratorExpressions = transformAllDecoratorsOfDeclaration(member, node, allDecorators);
             if (!decoratorExpressions) {
                 return undefined;
             }
-            // Emit the call to __decorate. Given the following:
-            //
-            //   class C {
-            //     @dec method(@dec2 x) {}
-            //     @dec get accessor() {}
-            //     @dec prop;
-            //   }
-            //
-            // The emit for a method is:
-            //
-            //   __decorate([
-            //       dec,
-            //       __param(0, dec2),
-            //       __metadata("design:type", Function),
-            //       __metadata("design:paramtypes", [Object]),
-            //       __metadata("design:returntype", void 0)
-            //   ], C.prototype, "method", null);
-            //
-            // The emit for an accessor is:
-            //
-            //   __decorate([
-            //       dec
-            //   ], C.prototype, "accessor", null);
-            //
-            // The emit for a property is:
-            //
-            //   __decorate([
-            //       dec
-            //   ], C.prototype, "prop");
-            //
             var prefix = getClassMemberPrefix(node, member);
-            var memberName = getExpressionForPropertyName(member, /*generateNameForComputedPropertyName*/ true);
-            var descriptor = languageVersion > 0 /* ES3 */
-                ? member.kind === 152 /* PropertyDeclaration */
-                    // We emit `void 0` here to indicate to `__decorate` that it can invoke `Object.defineProperty` directly, but that it
-                    // should not invoke `Object.getOwnPropertyDescriptor`.
+            var memberName = getExpressionForPropertyName(member, true);
+            var descriptor = languageVersion > 0
+                ? member.kind === 152
                     ? ts.createVoidZero()
-                    // We emit `null` here to indicate to `__decorate` that it can invoke `Object.getOwnPropertyDescriptor` directly.
-                    // We have this extra argument here so that we can inject an explicit property descriptor at a later date.
                     : ts.createNull()
                 : undefined;
             var helper = createDecorateHelper(context, decoratorExpressions, prefix, memberName, descriptor, ts.moveRangePastDecorators(member));
-            ts.setEmitFlags(helper, 1536 /* NoComments */);
+            ts.setEmitFlags(helper, 1536);
             return helper;
         }
-        /**
-         * Generates a __decorate helper call for a class constructor.
-         *
-         * @param node The class node.
-         */
         function addConstructorDecorationStatement(statements, node) {
             var expression = generateConstructorDecorationExpression(node);
             if (expression) {
                 statements.push(ts.setOriginalNode(ts.createStatement(expression), node));
             }
         }
-        /**
-         * Generates a __decorate helper call for a class constructor.
-         *
-         * @param node The class node.
-         */
         function generateConstructorDecorationExpression(node) {
             var allDecorators = getAllDecoratorsOfConstructor(node);
             var decoratorExpressions = transformAllDecoratorsOfDeclaration(node, node, allDecorators);
@@ -62402,47 +51714,29 @@ var ts;
                 return undefined;
             }
             var classAlias = classAliases && classAliases[ts.getOriginalNodeId(node)];
-            var localName = ts.getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ true);
+            var localName = ts.getLocalName(node, false, true);
             var decorate = createDecorateHelper(context, decoratorExpressions, localName);
             var expression = ts.createAssignment(localName, classAlias ? ts.createAssignment(classAlias, decorate) : decorate);
-            ts.setEmitFlags(expression, 1536 /* NoComments */);
+            ts.setEmitFlags(expression, 1536);
             ts.setSourceMapRange(expression, ts.moveRangePastDecorators(node));
             return expression;
         }
-        /**
-         * Transforms a decorator into an expression.
-         *
-         * @param decorator The decorator node.
-         */
         function transformDecorator(decorator) {
             return ts.visitNode(decorator.expression, visitor, ts.isExpression);
         }
-        /**
-         * Transforms the decorators of a parameter.
-         *
-         * @param decorators The decorators for the parameter at the provided offset.
-         * @param parameterOffset The offset of the parameter.
-         */
         function transformDecoratorsOfParameter(decorators, parameterOffset) {
             var expressions;
             if (decorators) {
                 expressions = [];
                 for (var _i = 0, decorators_1 = decorators; _i < decorators_1.length; _i++) {
                     var decorator = decorators_1[_i];
-                    var helper = createParamHelper(context, transformDecorator(decorator), parameterOffset, 
-                    /*location*/ decorator.expression);
-                    ts.setEmitFlags(helper, 1536 /* NoComments */);
+                    var helper = createParamHelper(context, transformDecorator(decorator), parameterOffset, decorator.expression);
+                    ts.setEmitFlags(helper, 1536);
                     expressions.push(helper);
                 }
             }
             return expressions;
         }
-        /**
-         * Adds optional type metadata for a declaration.
-         *
-         * @param node The declaration node.
-         * @param decoratorExpressions The destination array to which to add new decorator expressions.
-         */
         function addTypeMetadata(node, container, decoratorExpressions) {
             if (USE_NEW_TYPE_METADATA_FORMAT) {
                 addNewTypeMetadata(node, container, decoratorExpressions);
@@ -62468,88 +51762,57 @@ var ts;
             if (compilerOptions.emitDecoratorMetadata) {
                 var properties = void 0;
                 if (shouldAddTypeMetadata(node)) {
-                    (properties || (properties = [])).push(ts.createPropertyAssignment("type", ts.createArrowFunction(/*modifiers*/ undefined, /*typeParameters*/ undefined, [], /*type*/ undefined, ts.createToken(36 /* EqualsGreaterThanToken */), serializeTypeOfNode(node))));
+                    (properties || (properties = [])).push(ts.createPropertyAssignment("type", ts.createArrowFunction(undefined, undefined, [], undefined, ts.createToken(36), serializeTypeOfNode(node))));
                 }
                 if (shouldAddParamTypesMetadata(node)) {
-                    (properties || (properties = [])).push(ts.createPropertyAssignment("paramTypes", ts.createArrowFunction(/*modifiers*/ undefined, /*typeParameters*/ undefined, [], /*type*/ undefined, ts.createToken(36 /* EqualsGreaterThanToken */), serializeParameterTypesOfNode(node, container))));
+                    (properties || (properties = [])).push(ts.createPropertyAssignment("paramTypes", ts.createArrowFunction(undefined, undefined, [], undefined, ts.createToken(36), serializeParameterTypesOfNode(node, container))));
                 }
                 if (shouldAddReturnTypeMetadata(node)) {
-                    (properties || (properties = [])).push(ts.createPropertyAssignment("returnType", ts.createArrowFunction(/*modifiers*/ undefined, /*typeParameters*/ undefined, [], /*type*/ undefined, ts.createToken(36 /* EqualsGreaterThanToken */), serializeReturnTypeOfNode(node))));
+                    (properties || (properties = [])).push(ts.createPropertyAssignment("returnType", ts.createArrowFunction(undefined, undefined, [], undefined, ts.createToken(36), serializeReturnTypeOfNode(node))));
                 }
                 if (properties) {
-                    decoratorExpressions.push(createMetadataHelper(context, "design:typeinfo", ts.createObjectLiteral(properties, /*multiLine*/ true)));
+                    decoratorExpressions.push(createMetadataHelper(context, "design:typeinfo", ts.createObjectLiteral(properties, true)));
                 }
             }
         }
-        /**
-         * Determines whether to emit the "design:type" metadata based on the node's kind.
-         * The caller should have already tested whether the node has decorators and whether the
-         * emitDecoratorMetadata compiler option is set.
-         *
-         * @param node The node to test.
-         */
         function shouldAddTypeMetadata(node) {
             var kind = node.kind;
-            return kind === 154 /* MethodDeclaration */
-                || kind === 156 /* GetAccessor */
-                || kind === 157 /* SetAccessor */
-                || kind === 152 /* PropertyDeclaration */;
-        }
-        /**
-         * Determines whether to emit the "design:returntype" metadata based on the node's kind.
-         * The caller should have already tested whether the node has decorators and whether the
-         * emitDecoratorMetadata compiler option is set.
-         *
-         * @param node The node to test.
-         */
+            return kind === 154
+                || kind === 156
+                || kind === 157
+                || kind === 152;
+        }
         function shouldAddReturnTypeMetadata(node) {
-            return node.kind === 154 /* MethodDeclaration */;
-        }
-        /**
-         * Determines whether to emit the "design:paramtypes" metadata based on the node's kind.
-         * The caller should have already tested whether the node has decorators and whether the
-         * emitDecoratorMetadata compiler option is set.
-         *
-         * @param node The node to test.
-         */
+            return node.kind === 154;
+        }
         function shouldAddParamTypesMetadata(node) {
             switch (node.kind) {
-                case 235 /* ClassDeclaration */:
-                case 205 /* ClassExpression */:
+                case 235:
+                case 205:
                     return ts.getFirstConstructorWithBody(node) !== undefined;
-                case 154 /* MethodDeclaration */:
-                case 156 /* GetAccessor */:
-                case 157 /* SetAccessor */:
+                case 154:
+                case 156:
+                case 157:
                     return true;
             }
             return false;
         }
-        /**
-         * Serializes the type of a node for use with decorator type metadata.
-         *
-         * @param node The node that should have its type serialized.
-         */
         function serializeTypeOfNode(node) {
             switch (node.kind) {
-                case 152 /* PropertyDeclaration */:
-                case 149 /* Parameter */:
-                case 156 /* GetAccessor */:
+                case 152:
+                case 149:
+                case 156:
                     return serializeTypeNode(node.type);
-                case 157 /* SetAccessor */:
+                case 157:
                     return serializeTypeNode(ts.getSetAccessorTypeAnnotationNode(node));
-                case 235 /* ClassDeclaration */:
-                case 205 /* ClassExpression */:
-                case 154 /* MethodDeclaration */:
+                case 235:
+                case 205:
+                case 154:
                     return ts.createIdentifier("Function");
                 default:
                     return ts.createVoidZero();
             }
         }
-        /**
-         * Serializes the types of the parameters of a node for use with decorator type metadata.
-         *
-         * @param node The node that should have its parameter types serialized.
-         */
         function serializeParameterTypesOfNode(node, container) {
             var valueDeclaration = ts.isClassLike(node)
                 ? ts.getFirstConstructorWithBody(node)
@@ -62576,7 +51839,7 @@ var ts;
             return ts.createArrayLiteral(expressions);
         }
         function getParametersOfDecoratedDeclaration(node, container) {
-            if (container && node.kind === 156 /* GetAccessor */) {
+            if (container && node.kind === 156) {
                 var setAccessor = ts.getAllAccessorDeclarations(container.members, node).setAccessor;
                 if (setAccessor) {
                     return setAccessor.parameters;
@@ -62584,11 +51847,6 @@ var ts;
             }
             return node.parameters;
         }
-        /**
-         * Serializes the return type of a node for use with decorator type metadata.
-         *
-         * @param node The node that should have its return type serialized.
-         */
         function serializeReturnTypeOfNode(node) {
             if (ts.isFunctionLike(node) && node.type) {
                 return serializeTypeNode(node.type);
@@ -62598,81 +51856,63 @@ var ts;
             }
             return ts.createVoidZero();
         }
-        /**
-         * Serializes a type node for use with decorator type metadata.
-         *
-         * Types are serialized in the following fashion:
-         * - Void types point to "undefined" (e.g. "void 0")
-         * - Function and Constructor types point to the global "Function" constructor.
-         * - Interface types with a call or construct signature types point to the global
-         *   "Function" constructor.
-         * - Array and Tuple types point to the global "Array" constructor.
-         * - Type predicates and booleans point to the global "Boolean" constructor.
-         * - String literal types and strings point to the global "String" constructor.
-         * - Enum and number types point to the global "Number" constructor.
-         * - Symbol types point to the global "Symbol" constructor.
-         * - Type references to classes (or class-like variables) point to the constructor for the class.
-         * - Anything else points to the global "Object" constructor.
-         *
-         * @param node The type node to serialize.
-         */
         function serializeTypeNode(node) {
             if (node === undefined) {
                 return ts.createIdentifier("Object");
             }
             switch (node.kind) {
-                case 105 /* VoidKeyword */:
-                case 140 /* UndefinedKeyword */:
-                case 95 /* NullKeyword */:
-                case 131 /* NeverKeyword */:
+                case 105:
+                case 140:
+                case 95:
+                case 131:
                     return ts.createVoidZero();
-                case 173 /* ParenthesizedType */:
+                case 173:
                     return serializeTypeNode(node.type);
-                case 163 /* FunctionType */:
-                case 164 /* ConstructorType */:
+                case 163:
+                case 164:
                     return ts.createIdentifier("Function");
-                case 167 /* ArrayType */:
-                case 168 /* TupleType */:
+                case 167:
+                case 168:
                     return ts.createIdentifier("Array");
-                case 161 /* TypePredicate */:
-                case 122 /* BooleanKeyword */:
+                case 161:
+                case 122:
                     return ts.createIdentifier("Boolean");
-                case 137 /* StringKeyword */:
+                case 137:
                     return ts.createIdentifier("String");
-                case 135 /* ObjectKeyword */:
+                case 135:
                     return ts.createIdentifier("Object");
-                case 178 /* LiteralType */:
+                case 178:
                     switch (node.literal.kind) {
-                        case 9 /* StringLiteral */:
+                        case 9:
                             return ts.createIdentifier("String");
-                        case 8 /* NumericLiteral */:
+                        case 8:
                             return ts.createIdentifier("Number");
-                        case 101 /* TrueKeyword */:
-                        case 86 /* FalseKeyword */:
+                        case 101:
+                        case 86:
                             return ts.createIdentifier("Boolean");
                         default:
                             return ts.Debug.failBadSyntaxKind(node.literal);
                     }
-                case 134 /* NumberKeyword */:
+                case 134:
                     return ts.createIdentifier("Number");
-                case 138 /* SymbolKeyword */:
-                    return languageVersion < 2 /* ES2015 */
+                case 138:
+                    return languageVersion < 2
                         ? getGlobalSymbolNameWithFallback()
                         : ts.createIdentifier("Symbol");
-                case 162 /* TypeReference */:
+                case 162:
                     return serializeTypeReferenceNode(node);
-                case 170 /* IntersectionType */:
-                case 169 /* UnionType */:
+                case 170:
+                case 169:
                     return serializeUnionOrIntersectionType(node);
-                case 165 /* TypeQuery */:
-                case 175 /* TypeOperator */:
-                case 176 /* IndexedAccessType */:
-                case 177 /* MappedType */:
-                case 166 /* TypeLiteral */:
-                case 119 /* AnyKeyword */:
-                case 142 /* UnknownKeyword */:
-                case 174 /* ThisType */:
-                case 179 /* ImportType */:
+                case 165:
+                case 175:
+                case 176:
+                case 177:
+                case 166:
+                case 119:
+                case 142:
+                case 174:
+                case 179:
                     break;
                 default:
                     return ts.Debug.failBadSyntaxKind(node);
@@ -62680,29 +51920,23 @@ var ts;
             return ts.createIdentifier("Object");
         }
         function serializeUnionOrIntersectionType(node) {
-            // Note when updating logic here also update getEntityNameForDecoratorMetadata
-            // so that aliases can be marked as referenced
             var serializedUnion;
             for (var _i = 0, _a = node.types; _i < _a.length; _i++) {
                 var typeNode = _a[_i];
-                while (typeNode.kind === 173 /* ParenthesizedType */) {
-                    typeNode = typeNode.type; // Skip parens if need be
+                while (typeNode.kind === 173) {
+                    typeNode = typeNode.type;
                 }
-                if (typeNode.kind === 131 /* NeverKeyword */) {
-                    continue; // Always elide `never` from the union/intersection if possible
+                if (typeNode.kind === 131) {
+                    continue;
                 }
-                if (!strictNullChecks && (typeNode.kind === 95 /* NullKeyword */ || typeNode.kind === 140 /* UndefinedKeyword */)) {
-                    continue; // Elide null and undefined from unions for metadata, just like what we did prior to the implementation of strict null checks
+                if (!strictNullChecks && (typeNode.kind === 95 || typeNode.kind === 140)) {
+                    continue;
                 }
                 var serializedIndividual = serializeTypeNode(typeNode);
                 if (ts.isIdentifier(serializedIndividual) && serializedIndividual.escapedText === "Object") {
-                    // One of the individual is global object, return immediately
                     return serializedIndividual;
                 }
-                // If there exists union that is not void 0 expression, check if the the common type is identifier.
-                // anything more complex and we will just default to Object
                 else if (serializedUnion) {
-                    // Different types
                     if (!ts.isIdentifier(serializedUnion) ||
                         !ts.isIdentifier(serializedIndividual) ||
                         serializedUnion.escapedText !== serializedIndividual.escapedText) {
@@ -62710,28 +51944,20 @@ var ts;
                     }
                 }
                 else {
-                    // Initialize the union type
                     serializedUnion = serializedIndividual;
                 }
             }
-            // If we were able to find common type, use it
-            return serializedUnion || ts.createVoidZero(); // Fallback is only hit if all union constituients are null/undefined/never
+            return serializedUnion || ts.createVoidZero();
         }
-        /**
-         * Serializes a TypeReferenceNode to an appropriate JS constructor value for use with
-         * decorator type metadata.
-         *
-         * @param node The type reference node.
-         */
         function serializeTypeReferenceNode(node) {
             var kind = resolver.getTypeReferenceSerializationKind(node.typeName, currentScope);
             switch (kind) {
                 case ts.TypeReferenceSerializationKind.Unknown:
-                    var serialized = serializeEntityNameAsExpression(node.typeName, /*useFallback*/ true);
+                    var serialized = serializeEntityNameAsExpression(node.typeName, true);
                     var temp = ts.createTempVariable(hoistVariableDeclaration);
                     return ts.createLogicalOr(ts.createLogicalAnd(ts.createTypeCheck(ts.createAssignment(temp, serialized), "function"), temp), ts.createIdentifier("Object"));
                 case ts.TypeReferenceSerializationKind.TypeWithConstructSignatureAndValue:
-                    return serializeEntityNameAsExpression(node.typeName, /*useFallback*/ false);
+                    return serializeEntityNameAsExpression(node.typeName, false);
                 case ts.TypeReferenceSerializationKind.VoidNullableOrNeverType:
                     return ts.createVoidZero();
                 case ts.TypeReferenceSerializationKind.BooleanType:
@@ -62743,7 +51969,7 @@ var ts;
                 case ts.TypeReferenceSerializationKind.ArrayLikeType:
                     return ts.createIdentifier("Array");
                 case ts.TypeReferenceSerializationKind.ESSymbolType:
-                    return languageVersion < 2 /* ES2015 */
+                    return languageVersion < 2
                         ? getGlobalSymbolNameWithFallback()
                         : ts.createIdentifier("Symbol");
                 case ts.TypeReferenceSerializationKind.TypeWithCallSignature:
@@ -62756,73 +51982,42 @@ var ts;
                     return ts.Debug.assertNever(kind);
             }
         }
-        /**
-         * Serializes an entity name as an expression for decorator type metadata.
-         *
-         * @param node The entity name to serialize.
-         * @param useFallback A value indicating whether to use logical operators to test for the
-         *                    entity name at runtime.
-         */
         function serializeEntityNameAsExpression(node, useFallback) {
             switch (node.kind) {
-                case 71 /* Identifier */:
-                    // Create a clone of the name with a new parent, and treat it as if it were
-                    // a source tree node for the purposes of the checker.
+                case 71:
                     var name = ts.getMutableClone(node);
-                    name.flags &= ~8 /* Synthesized */;
+                    name.flags &= ~8;
                     name.original = undefined;
-                    name.parent = ts.getParseTreeNode(currentScope); // ensure the parent is set to a parse tree node.
+                    name.parent = ts.getParseTreeNode(currentScope);
                     if (useFallback) {
                         return ts.createLogicalAnd(ts.createStrictInequality(ts.createTypeOf(name), ts.createLiteral("undefined")), name);
                     }
                     return name;
-                case 146 /* QualifiedName */:
+                case 146:
                     return serializeQualifiedNameAsExpression(node, useFallback);
             }
         }
-        /**
-         * Serializes an qualified name as an expression for decorator type metadata.
-         *
-         * @param node The qualified name to serialize.
-         * @param useFallback A value indicating whether to use logical operators to test for the
-         *                    qualified name at runtime.
-         */
         function serializeQualifiedNameAsExpression(node, useFallback) {
             var left;
-            if (node.left.kind === 71 /* Identifier */) {
+            if (node.left.kind === 71) {
                 left = serializeEntityNameAsExpression(node.left, useFallback);
             }
             else if (useFallback) {
                 var temp = ts.createTempVariable(hoistVariableDeclaration);
-                left = ts.createLogicalAnd(ts.createAssignment(temp, serializeEntityNameAsExpression(node.left, /*useFallback*/ true)), temp);
+                left = ts.createLogicalAnd(ts.createAssignment(temp, serializeEntityNameAsExpression(node.left, true)), temp);
             }
             else {
-                left = serializeEntityNameAsExpression(node.left, /*useFallback*/ false);
+                left = serializeEntityNameAsExpression(node.left, false);
             }
             return ts.createPropertyAccess(left, node.right);
         }
-        /**
-         * Gets an expression that points to the global "Symbol" constructor at runtime if it is
-         * available.
-         */
         function getGlobalSymbolNameWithFallback() {
             return ts.createConditional(ts.createTypeCheck(ts.createIdentifier("Symbol"), "function"), ts.createIdentifier("Symbol"), ts.createIdentifier("Object"));
         }
-        /**
-         * A simple inlinable expression is an expression which can be copied into multiple locations
-         * without risk of repeating any sideeffects and whose value could not possibly change between
-         * any such locations
-         */
         function isSimpleInlineableExpression(expression) {
             return !ts.isIdentifier(expression) && ts.isSimpleCopiableExpression(expression) ||
                 ts.isWellKnownSymbolSyntactically(expression);
         }
-        /**
-         * Gets an expression that represents a property name. For a computed property, a
-         * name is generated for the node.
-         *
-         * @param member The member whose name should be converted into an expression.
-         */
         function getExpressionForPropertyName(member, generateNameForComputedPropertyName) {
             var name = member.name;
             if (ts.isComputedPropertyName(name)) {
@@ -62837,12 +52032,6 @@ var ts;
                 return ts.getSynthesizedClone(name);
             }
         }
-        /**
-         * If the name is a computed property, this function transforms it, then either returns an expression which caches the
-         * value of the result or the expression itself if the value is either unused or safe to inline into multiple locations
-         * @param shouldHoist Does the expression need to be reused? (ie, for an initializer or a decorator)
-         * @param omitSimple Should expressions with no observable side-effects be elided? (ie, the expression is not hoisted for a decorator or initializer and is a literal)
-         */
         function getPropertyNameExpressionIfNeeded(name, shouldHoist, omitSimple) {
             if (ts.isComputedPropertyName(name)) {
                 var expression = ts.visitNode(name.expression, visitor, ts.isExpression);
@@ -62856,18 +52045,10 @@ var ts;
                 return (omitSimple && (inlinable || ts.isIdentifier(innerExpression))) ? undefined : expression;
             }
         }
-        /**
-         * Visits the property name of a class element, for use when emitting property
-         * initializers. For a computed property on a node with decorators, a temporary
-         * value is stored for later use.
-         *
-         * @param member The member whose name should be visited.
-         */
         function visitPropertyNameOfClassElement(member) {
             var name = member.name;
-            var expr = getPropertyNameExpressionIfNeeded(name, ts.some(member.decorators), /*omitSimple*/ false);
-            if (expr) { // expr only exists if `name` is a computed property name
-                // Inline any pending expressions from previous elided or relocated computed property name expressions in order to preserve execution order
+            var expr = getPropertyNameExpressionIfNeeded(name, ts.some(member.decorators), false);
+            if (expr) {
                 if (ts.some(pendingExpressions)) {
                     expr = ts.inlineExpressions(pendingExpressions.concat([expr]));
                     pendingExpressions.length = 0;
@@ -62878,45 +52059,21 @@ var ts;
                 return name;
             }
         }
-        /**
-         * Transforms a HeritageClause with TypeScript syntax.
-         *
-         * This function will only be called when one of the following conditions are met:
-         * - The node is a non-`extends` heritage clause that should be elided.
-         * - The node is an `extends` heritage clause that should be visited, but only allow a single type.
-         *
-         * @param node The HeritageClause to transform.
-         */
         function visitHeritageClause(node) {
-            if (node.token === 85 /* ExtendsKeyword */) {
+            if (node.token === 85) {
                 var types = ts.visitNodes(node.types, visitor, ts.isExpressionWithTypeArguments, 0, 1);
-                return ts.setTextRange(ts.createHeritageClause(85 /* ExtendsKeyword */, types), node);
+                return ts.setTextRange(ts.createHeritageClause(85, types), node);
             }
             return undefined;
         }
-        /**
-         * Transforms an ExpressionWithTypeArguments with TypeScript syntax.
-         *
-         * This function will only be called when one of the following conditions are met:
-         * - The node contains type arguments that should be elided.
-         *
-         * @param node The ExpressionWithTypeArguments to transform.
-         */
         function visitExpressionWithTypeArguments(node) {
-            return ts.updateExpressionWithTypeArguments(node, 
-            /*typeArguments*/ undefined, ts.visitNode(node.expression, visitor, ts.isLeftHandSideExpression));
-        }
-        /**
-         * Determines whether to emit a function-like declaration. We should not emit the
-         * declaration if it does not have a body.
-         *
-         * @param node The declaration node.
-         */
+            return ts.updateExpressionWithTypeArguments(node, undefined, ts.visitNode(node.expression, visitor, ts.isLeftHandSideExpression));
+        }
         function shouldEmitFunctionLikeDeclaration(node) {
             return !ts.nodeIsMissing(node.body);
         }
         function visitPropertyDeclaration(node) {
-            var expr = getPropertyNameExpressionIfNeeded(node.name, ts.some(node.decorators) || !!node.initializer, /*omitSimple*/ true);
+            var expr = getPropertyNameExpressionIfNeeded(node.name, ts.some(node.decorators) || !!node.initializer, true);
             if (expr && !isSimpleInlineableExpression(expr)) {
                 (pendingExpressions || (pendingExpressions = [])).push(expr);
             }
@@ -62928,107 +52085,47 @@ var ts;
             }
             return ts.updateConstructor(node, ts.visitNodes(node.decorators, visitor, ts.isDecorator), ts.visitNodes(node.modifiers, visitor, ts.isModifier), ts.visitParameterList(node.parameters, visitor, context), ts.visitFunctionBody(node.body, visitor, context));
         }
-        /**
-         * Visits a method declaration of a class.
-         *
-         * This function will be called when one of the following conditions are met:
-         * - The node is an overload
-         * - The node is marked as abstract, public, private, protected, or readonly
-         * - The node has a computed property name
-         *
-         * @param node The method node.
-         */
         function visitMethodDeclaration(node) {
             if (!shouldEmitFunctionLikeDeclaration(node)) {
                 return undefined;
             }
-            var updated = ts.updateMethod(node, 
-            /*decorators*/ undefined, ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), node.asteriskToken, visitPropertyNameOfClassElement(node), 
-            /*questionToken*/ undefined, 
-            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
-            /*type*/ undefined, ts.visitFunctionBody(node.body, visitor, context));
+            var updated = ts.updateMethod(node, undefined, ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), node.asteriskToken, visitPropertyNameOfClassElement(node), undefined, undefined, ts.visitParameterList(node.parameters, visitor, context), undefined, ts.visitFunctionBody(node.body, visitor, context));
             if (updated !== node) {
-                // While we emit the source map for the node after skipping decorators and modifiers,
-                // we need to emit the comments for the original range.
                 ts.setCommentRange(updated, node);
                 ts.setSourceMapRange(updated, ts.moveRangePastDecorators(node));
             }
             return updated;
         }
-        /**
-         * Determines whether to emit an accessor declaration. We should not emit the
-         * declaration if it does not have a body and is abstract.
-         *
-         * @param node The declaration node.
-         */
         function shouldEmitAccessorDeclaration(node) {
-            return !(ts.nodeIsMissing(node.body) && ts.hasModifier(node, 128 /* Abstract */));
-        }
-        /**
-         * Visits a get accessor declaration of a class.
-         *
-         * This function will be called when one of the following conditions are met:
-         * - The node is marked as abstract, public, private, or protected
-         * - The node has a computed property name
-         *
-         * @param node The get accessor node.
-         */
+            return !(ts.nodeIsMissing(node.body) && ts.hasModifier(node, 128));
+        }
         function visitGetAccessor(node) {
             if (!shouldEmitAccessorDeclaration(node)) {
                 return undefined;
             }
-            var updated = ts.updateGetAccessor(node, 
-            /*decorators*/ undefined, ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), visitPropertyNameOfClassElement(node), ts.visitParameterList(node.parameters, visitor, context), 
-            /*type*/ undefined, ts.visitFunctionBody(node.body, visitor, context) || ts.createBlock([]));
+            var updated = ts.updateGetAccessor(node, undefined, ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), visitPropertyNameOfClassElement(node), ts.visitParameterList(node.parameters, visitor, context), undefined, ts.visitFunctionBody(node.body, visitor, context) || ts.createBlock([]));
             if (updated !== node) {
-                // While we emit the source map for the node after skipping decorators and modifiers,
-                // we need to emit the comments for the original range.
                 ts.setCommentRange(updated, node);
                 ts.setSourceMapRange(updated, ts.moveRangePastDecorators(node));
             }
             return updated;
         }
-        /**
-         * Visits a set accessor declaration of a class.
-         *
-         * This function will be called when one of the following conditions are met:
-         * - The node is marked as abstract, public, private, or protected
-         * - The node has a computed property name
-         *
-         * @param node The set accessor node.
-         */
         function visitSetAccessor(node) {
             if (!shouldEmitAccessorDeclaration(node)) {
                 return undefined;
             }
-            var updated = ts.updateSetAccessor(node, 
-            /*decorators*/ undefined, ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), visitPropertyNameOfClassElement(node), ts.visitParameterList(node.parameters, visitor, context), ts.visitFunctionBody(node.body, visitor, context) || ts.createBlock([]));
+            var updated = ts.updateSetAccessor(node, undefined, ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), visitPropertyNameOfClassElement(node), ts.visitParameterList(node.parameters, visitor, context), ts.visitFunctionBody(node.body, visitor, context) || ts.createBlock([]));
             if (updated !== node) {
-                // While we emit the source map for the node after skipping decorators and modifiers,
-                // we need to emit the comments for the original range.
                 ts.setCommentRange(updated, node);
                 ts.setSourceMapRange(updated, ts.moveRangePastDecorators(node));
             }
             return updated;
         }
-        /**
-         * Visits a function declaration.
-         *
-         * This function will be called when one of the following conditions are met:
-         * - The node is an overload
-         * - The node is exported from a TypeScript namespace
-         * - The node has decorators
-         *
-         * @param node The function node.
-         */
         function visitFunctionDeclaration(node) {
             if (!shouldEmitFunctionLikeDeclaration(node)) {
                 return ts.createNotEmittedStatement(node);
             }
-            var updated = ts.updateFunctionDeclaration(node, 
-            /*decorators*/ undefined, ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), node.asteriskToken, node.name, 
-            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
-            /*type*/ undefined, ts.visitFunctionBody(node.body, visitor, context) || ts.createBlock([]));
+            var updated = ts.updateFunctionDeclaration(node, undefined, ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), node.asteriskToken, node.name, undefined, ts.visitParameterList(node.parameters, visitor, context), undefined, ts.visitFunctionBody(node.body, visitor, context) || ts.createBlock([]));
             if (isExportOfNamespace(node)) {
                 var statements = [updated];
                 addExportMemberAssignment(statements, node);
@@ -63036,73 +52133,33 @@ var ts;
             }
             return updated;
         }
-        /**
-         * Visits a function expression node.
-         *
-         * This function will be called when one of the following conditions are met:
-         * - The node has type annotations
-         *
-         * @param node The function expression node.
-         */
         function visitFunctionExpression(node) {
             if (!shouldEmitFunctionLikeDeclaration(node)) {
                 return ts.createOmittedExpression();
             }
-            var updated = ts.updateFunctionExpression(node, ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), node.asteriskToken, node.name, 
-            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
-            /*type*/ undefined, ts.visitFunctionBody(node.body, visitor, context) || ts.createBlock([]));
+            var updated = ts.updateFunctionExpression(node, ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), node.asteriskToken, node.name, undefined, ts.visitParameterList(node.parameters, visitor, context), undefined, ts.visitFunctionBody(node.body, visitor, context) || ts.createBlock([]));
             return updated;
         }
-        /**
-         * @remarks
-         * This function will be called when one of the following conditions are met:
-         * - The node has type annotations
-         */
         function visitArrowFunction(node) {
-            var updated = ts.updateArrowFunction(node, ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), 
-            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
-            /*type*/ undefined, node.equalsGreaterThanToken, ts.visitFunctionBody(node.body, visitor, context));
+            var updated = ts.updateArrowFunction(node, ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), undefined, ts.visitParameterList(node.parameters, visitor, context), undefined, node.equalsGreaterThanToken, ts.visitFunctionBody(node.body, visitor, context));
             return updated;
         }
-        /**
-         * Visits a parameter declaration node.
-         *
-         * This function will be called when one of the following conditions are met:
-         * - The node has an accessibility modifier.
-         * - The node has a questionToken.
-         * - The node's kind is ThisKeyword.
-         *
-         * @param node The parameter declaration node.
-         */
         function visitParameter(node) {
             if (ts.parameterIsThisKeyword(node)) {
                 return undefined;
             }
-            var parameter = ts.createParameter(
-            /*decorators*/ undefined, 
-            /*modifiers*/ undefined, node.dotDotDotToken, ts.visitNode(node.name, visitor, ts.isBindingName), 
-            /*questionToken*/ undefined, 
-            /*type*/ undefined, ts.visitNode(node.initializer, visitor, ts.isExpression));
-            // While we emit the source map for the node after skipping decorators and modifiers,
-            // we need to emit the comments for the original range.
+            var parameter = ts.createParameter(undefined, undefined, node.dotDotDotToken, ts.visitNode(node.name, visitor, ts.isBindingName), undefined, undefined, ts.visitNode(node.initializer, visitor, ts.isExpression));
             ts.setOriginalNode(parameter, node);
             ts.setTextRange(parameter, ts.moveRangePastModifiers(node));
             ts.setCommentRange(parameter, node);
             ts.setSourceMapRange(parameter, ts.moveRangePastModifiers(node));
-            ts.setEmitFlags(parameter.name, 32 /* NoTrailingSourceMap */);
+            ts.setEmitFlags(parameter.name, 32);
             return parameter;
         }
-        /**
-         * Visits a variable statement in a namespace.
-         *
-         * This function will be called when one of the following conditions are met:
-         * - The node is exported from a TypeScript namespace.
-         */
         function visitVariableStatement(node) {
             if (isExportOfNamespace(node)) {
                 var variables = ts.getInitializedVariables(node.declarationList);
                 if (variables.length === 0) {
-                    // elide statement if there are no initialized variables.
                     return undefined;
                 }
                 return ts.setTextRange(ts.createStatement(ts.inlineExpressions(ts.map(variables, transformInitializedVariable))), node);
@@ -63114,45 +52171,19 @@ var ts;
         function transformInitializedVariable(node) {
             var name = node.name;
             if (ts.isBindingPattern(name)) {
-                return ts.flattenDestructuringAssignment(node, visitor, context, 0 /* All */, 
-                /*needsValue*/ false, createNamespaceExportExpression);
+                return ts.flattenDestructuringAssignment(node, visitor, context, 0, false, createNamespaceExportExpression);
             }
             else {
-                return ts.setTextRange(ts.createAssignment(getNamespaceMemberNameWithSourceMapsAndWithoutComments(name), ts.visitNode(node.initializer, visitor, ts.isExpression)), 
-                /*location*/ node);
+                return ts.setTextRange(ts.createAssignment(getNamespaceMemberNameWithSourceMapsAndWithoutComments(name), ts.visitNode(node.initializer, visitor, ts.isExpression)), node);
             }
         }
         function visitVariableDeclaration(node) {
-            return ts.updateVariableDeclaration(node, ts.visitNode(node.name, visitor, ts.isBindingName), 
-            /*type*/ undefined, ts.visitNode(node.initializer, visitor, ts.isExpression));
-        }
-        /**
-         * Visits a parenthesized expression that contains either a type assertion or an `as`
-         * expression.
-         *
-         * @param node The parenthesized expression node.
-         */
+            return ts.updateVariableDeclaration(node, ts.visitNode(node.name, visitor, ts.isBindingName), undefined, ts.visitNode(node.initializer, visitor, ts.isExpression));
+        }
         function visitParenthesizedExpression(node) {
-            var innerExpression = ts.skipOuterExpressions(node.expression, ~2 /* Assertions */);
+            var innerExpression = ts.skipOuterExpressions(node.expression, ~2);
             if (ts.isAssertionExpression(innerExpression)) {
-                // Make sure we consider all nested cast expressions, e.g.:
-                // (<any><number><any>-A).x;
                 var expression = ts.visitNode(node.expression, visitor, ts.isExpression);
-                // We have an expression of the form: (<Type>SubExpr). Emitting this as (SubExpr)
-                // is really not desirable. We would like to emit the subexpression as-is. Omitting
-                // the parentheses, however, could cause change in the semantics of the generated
-                // code if the casted expression has a lower precedence than the rest of the
-                // expression.
-                //
-                // To preserve comments, we return a "PartiallyEmittedExpression" here which will
-                // preserve the position information of the original expression.
-                //
-                // Due to the auto-parenthesization rules used by the visitor and factory functions
-                // we can safely elide the parentheses here, as a new synthetic
-                // ParenthesizedExpression will be inserted if we remove parentheses too
-                // aggressively.
-                // HOWEVER - if there are leading comments on the expression itself, to handle ASI
-                // correctly for return and throw, we must keep the parenthesis
                 if (ts.length(ts.getLeadingCommentRangesOfNode(expression, currentSourceFile))) {
                     return ts.updateParen(node, expression);
                 }
@@ -63169,93 +52200,48 @@ var ts;
             return ts.createPartiallyEmittedExpression(expression, node);
         }
         function visitCallExpression(node) {
-            return ts.updateCall(node, ts.visitNode(node.expression, visitor, ts.isExpression), 
-            /*typeArguments*/ undefined, ts.visitNodes(node.arguments, visitor, ts.isExpression));
+            return ts.updateCall(node, ts.visitNode(node.expression, visitor, ts.isExpression), undefined, ts.visitNodes(node.arguments, visitor, ts.isExpression));
         }
         function visitNewExpression(node) {
-            return ts.updateNew(node, ts.visitNode(node.expression, visitor, ts.isExpression), 
-            /*typeArguments*/ undefined, ts.visitNodes(node.arguments, visitor, ts.isExpression));
+            return ts.updateNew(node, ts.visitNode(node.expression, visitor, ts.isExpression), undefined, ts.visitNodes(node.arguments, visitor, ts.isExpression));
         }
         function visitTaggedTemplateExpression(node) {
-            return ts.updateTaggedTemplate(node, ts.visitNode(node.tag, visitor, ts.isExpression), 
-            /*typeArguments*/ undefined, ts.visitNode(node.template, visitor, ts.isExpression));
-        }
-        /**
-         * Determines whether to emit an enum declaration.
-         *
-         * @param node The enum declaration node.
-         */
+            return ts.updateTaggedTemplate(node, ts.visitNode(node.tag, visitor, ts.isExpression), undefined, ts.visitNode(node.template, visitor, ts.isExpression));
+        }
         function shouldEmitEnumDeclaration(node) {
             return !ts.isConst(node)
                 || compilerOptions.preserveConstEnums
                 || compilerOptions.isolatedModules;
         }
-        /**
-         * Visits an enum declaration.
-         *
-         * This function will be called any time a TypeScript enum is encountered.
-         *
-         * @param node The enum declaration node.
-         */
         function visitEnumDeclaration(node) {
             if (!shouldEmitEnumDeclaration(node)) {
                 return undefined;
             }
             var statements = [];
-            // We request to be advised when the printer is about to print this node. This allows
-            // us to set up the correct state for later substitutions.
-            var emitFlags = 2 /* AdviseOnEmitNode */;
-            // If needed, we should emit a variable declaration for the enum. If we emit
-            // a leading variable declaration, we should not emit leading comments for the
-            // enum body.
+            var emitFlags = 2;
             if (addVarForEnumOrModuleDeclaration(statements, node)) {
-                // We should still emit the comments if we are emitting a system module.
                 if (moduleKind !== ts.ModuleKind.System || currentScope !== currentSourceFile) {
-                    emitFlags |= 512 /* NoLeadingComments */;
+                    emitFlags |= 512;
                 }
             }
-            // `parameterName` is the declaration name used inside of the enum.
             var parameterName = getNamespaceParameterName(node);
-            // `containerName` is the expression used inside of the enum for assignments.
             var containerName = getNamespaceContainerName(node);
-            // `exportName` is the expression used within this node's container for any exported references.
-            var exportName = ts.hasModifier(node, 1 /* Export */)
-                ? ts.getExternalModuleOrNamespaceExportName(currentNamespaceContainerName, node, /*allowComments*/ false, /*allowSourceMaps*/ true)
-                : ts.getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ true);
-            //  x || (x = {})
-            //  exports.x || (exports.x = {})
+            var exportName = ts.hasModifier(node, 1)
+                ? ts.getExternalModuleOrNamespaceExportName(currentNamespaceContainerName, node, false, true)
+                : ts.getLocalName(node, false, true);
             var moduleArg = ts.createLogicalOr(exportName, ts.createAssignment(exportName, ts.createObjectLiteral()));
             if (hasNamespaceQualifiedExportName(node)) {
-                // `localName` is the expression used within this node's containing scope for any local references.
-                var localName = ts.getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ true);
-                //  x = (exports.x || (exports.x = {}))
+                var localName = ts.getLocalName(node, false, true);
                 moduleArg = ts.createAssignment(localName, moduleArg);
             }
-            //  (function (x) {
-            //      x[x["y"] = 0] = "y";
-            //      ...
-            //  })(x || (x = {}));
-            var enumStatement = ts.createStatement(ts.createCall(ts.createFunctionExpression(
-            /*modifiers*/ undefined, 
-            /*asteriskToken*/ undefined, 
-            /*name*/ undefined, 
-            /*typeParameters*/ undefined, [ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, parameterName)], 
-            /*type*/ undefined, transformEnumBody(node, containerName)), 
-            /*typeArguments*/ undefined, [moduleArg]));
+            var enumStatement = ts.createStatement(ts.createCall(ts.createFunctionExpression(undefined, undefined, undefined, undefined, [ts.createParameter(undefined, undefined, undefined, parameterName)], undefined, transformEnumBody(node, containerName)), undefined, [moduleArg]));
             ts.setOriginalNode(enumStatement, node);
             ts.setTextRange(enumStatement, node);
             ts.setEmitFlags(enumStatement, emitFlags);
             statements.push(enumStatement);
-            // Add a DeclarationMarker for the enum to preserve trailing comments and mark
-            // the end of the declaration.
             statements.push(ts.createEndOfDeclarationMarker(node));
             return statements;
         }
-        /**
-         * Transforms the body of an enum declaration.
-         *
-         * @param node The enum declaration node.
-         */
         function transformEnumBody(node, localName) {
             var savedCurrentNamespaceLocalName = currentNamespaceContainerName;
             currentNamespaceContainerName = localName;
@@ -63265,31 +52251,17 @@ var ts;
             ts.prependStatements(statements, endLexicalEnvironment());
             ts.addRange(statements, members);
             currentNamespaceContainerName = savedCurrentNamespaceLocalName;
-            return ts.createBlock(ts.setTextRange(ts.createNodeArray(statements), /*location*/ node.members), 
-            /*multiLine*/ true);
-        }
-        /**
-         * Transforms an enum member into a statement.
-         *
-         * @param member The enum member node.
-         */
+            return ts.createBlock(ts.setTextRange(ts.createNodeArray(statements), node.members), true);
+        }
         function transformEnumMember(member) {
-            // enums don't support computed properties
-            // we pass false as 'generateNameForComputedPropertyName' for a backward compatibility purposes
-            // old emitter always generate 'expression' part of the name as-is.
-            var name = getExpressionForPropertyName(member, /*generateNameForComputedPropertyName*/ false);
+            var name = getExpressionForPropertyName(member, false);
             var valueExpression = transformEnumMemberDeclarationValue(member);
             var innerAssignment = ts.createAssignment(ts.createElementAccess(currentNamespaceContainerName, name), valueExpression);
-            var outerAssignment = valueExpression.kind === 9 /* StringLiteral */ ?
+            var outerAssignment = valueExpression.kind === 9 ?
                 innerAssignment :
                 ts.createAssignment(ts.createElementAccess(currentNamespaceContainerName, innerAssignment), name);
             return ts.setTextRange(ts.createStatement(ts.setTextRange(outerAssignment, member)), member);
         }
-        /**
-         * Transforms the value of an enum member.
-         *
-         * @param member The enum member node.
-         */
         function transformEnumMemberDeclarationValue(member) {
             var value = resolver.getConstantValue(member);
             if (value !== undefined) {
@@ -63305,18 +52277,9 @@ var ts;
                 }
             }
         }
-        /**
-         * Determines whether to elide a module declaration.
-         *
-         * @param node The module declaration node.
-         */
         function shouldEmitModuleDeclaration(node) {
             return ts.isInstantiatedModule(node, !!compilerOptions.preserveConstEnums || !!compilerOptions.isolatedModules);
         }
-        /**
-         * Determines whether an exported declaration will have a qualified export name (e.g. `f.x`
-         * or `exports.x`).
-         */
         function hasNamespaceQualifiedExportName(node) {
             return isExportOfNamespace(node)
                 || (isExternalModuleExport(node)
@@ -63324,10 +52287,6 @@ var ts;
                     && moduleKind !== ts.ModuleKind.ESNext
                     && moduleKind !== ts.ModuleKind.System);
         }
-        /**
-         * Records that a declaration was emitted in the current scope, if it was the first
-         * declaration for the provided symbol.
-         */
         function recordEmittedDeclarationInScope(node) {
             if (!currentScopeFirstDeclarationsOfName) {
                 currentScopeFirstDeclarationsOfName = ts.createUnderscoreEscapedMap();
@@ -63337,10 +52296,6 @@ var ts;
                 currentScopeFirstDeclarationsOfName.set(name, node);
             }
         }
-        /**
-         * Determines whether a declaration is the first declaration with
-         * the same name emitted in the current scope.
-         */
         function isFirstEmittedDeclarationInScope(node) {
             if (currentScopeFirstDeclarationsOfName) {
                 var name = declaredNameInScope(node);
@@ -63352,67 +52307,31 @@ var ts;
             ts.Debug.assertNode(node.name, ts.isIdentifier);
             return node.name.escapedText;
         }
-        /**
-         * Adds a leading VariableStatement for a enum or module declaration.
-         */
         function addVarForEnumOrModuleDeclaration(statements, node) {
-            // Emit a variable statement for the module. We emit top-level enums as a `var`
-            // declaration to avoid static errors in global scripts scripts due to redeclaration.
-            // enums in any other scope are emitted as a `let` declaration.
             var statement = ts.createVariableStatement(ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), ts.createVariableDeclarationList([
-                ts.createVariableDeclaration(ts.getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ true))
-            ], currentScope.kind === 274 /* SourceFile */ ? 0 /* None */ : 1 /* Let */));
+                ts.createVariableDeclaration(ts.getLocalName(node, false, true))
+            ], currentScope.kind === 274 ? 0 : 1));
             ts.setOriginalNode(statement, node);
             recordEmittedDeclarationInScope(node);
             if (isFirstEmittedDeclarationInScope(node)) {
-                // Adjust the source map emit to match the old emitter.
-                if (node.kind === 238 /* EnumDeclaration */) {
+                if (node.kind === 238) {
                     ts.setSourceMapRange(statement.declarationList, node);
                 }
                 else {
                     ts.setSourceMapRange(statement, node);
                 }
-                // Trailing comments for module declaration should be emitted after the function closure
-                // instead of the variable statement:
-                //
-                //     /** Module comment*/
-                //     module m1 {
-                //         function foo4Export() {
-                //         }
-                //     } // trailing comment module
-                //
-                // Should emit:
-                //
-                //     /** Module comment*/
-                //     var m1;
-                //     (function (m1) {
-                //         function foo4Export() {
-                //         }
-                //     })(m1 || (m1 = {})); // trailing comment module
-                //
                 ts.setCommentRange(statement, node);
-                ts.setEmitFlags(statement, 1024 /* NoTrailingComments */ | 4194304 /* HasEndOfDeclarationMarker */);
+                ts.setEmitFlags(statement, 1024 | 4194304);
                 statements.push(statement);
                 return true;
             }
             else {
-                // For an EnumDeclaration or ModuleDeclaration that merges with a preceeding
-                // declaration we do not emit a leading variable declaration. To preserve the
-                // begin/end semantics of the declararation and to properly handle exports
-                // we wrap the leading variable declaration in a `MergeDeclarationMarker`.
                 var mergeMarker = ts.createMergeDeclarationMarker(statement);
-                ts.setEmitFlags(mergeMarker, 1536 /* NoComments */ | 4194304 /* HasEndOfDeclarationMarker */);
+                ts.setEmitFlags(mergeMarker, 1536 | 4194304);
                 statements.push(mergeMarker);
                 return false;
             }
         }
-        /**
-         * Visits a module declaration node.
-         *
-         * This function will be called any time a TypeScript namespace (ModuleDeclaration) is encountered.
-         *
-         * @param node The module declaration node.
-         */
         function visitModuleDeclaration(node) {
             if (!shouldEmitModuleDeclaration(node)) {
                 return ts.createNotEmittedStatement(node);
@@ -63420,59 +52339,30 @@ var ts;
             ts.Debug.assertNode(node.name, ts.isIdentifier, "A TypeScript namespace should have an Identifier name.");
             enableSubstitutionForNamespaceExports();
             var statements = [];
-            // We request to be advised when the printer is about to print this node. This allows
-            // us to set up the correct state for later substitutions.
-            var emitFlags = 2 /* AdviseOnEmitNode */;
-            // If needed, we should emit a variable declaration for the module. If we emit
-            // a leading variable declaration, we should not emit leading comments for the
-            // module body.
+            var emitFlags = 2;
             if (addVarForEnumOrModuleDeclaration(statements, node)) {
-                // We should still emit the comments if we are emitting a system module.
                 if (moduleKind !== ts.ModuleKind.System || currentScope !== currentSourceFile) {
-                    emitFlags |= 512 /* NoLeadingComments */;
+                    emitFlags |= 512;
                 }
             }
-            // `parameterName` is the declaration name used inside of the namespace.
             var parameterName = getNamespaceParameterName(node);
-            // `containerName` is the expression used inside of the namespace for exports.
             var containerName = getNamespaceContainerName(node);
-            // `exportName` is the expression used within this node's container for any exported references.
-            var exportName = ts.hasModifier(node, 1 /* Export */)
-                ? ts.getExternalModuleOrNamespaceExportName(currentNamespaceContainerName, node, /*allowComments*/ false, /*allowSourceMaps*/ true)
-                : ts.getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ true);
-            //  x || (x = {})
-            //  exports.x || (exports.x = {})
+            var exportName = ts.hasModifier(node, 1)
+                ? ts.getExternalModuleOrNamespaceExportName(currentNamespaceContainerName, node, false, true)
+                : ts.getLocalName(node, false, true);
             var moduleArg = ts.createLogicalOr(exportName, ts.createAssignment(exportName, ts.createObjectLiteral()));
             if (hasNamespaceQualifiedExportName(node)) {
-                // `localName` is the expression used within this node's containing scope for any local references.
-                var localName = ts.getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ true);
-                //  x = (exports.x || (exports.x = {}))
+                var localName = ts.getLocalName(node, false, true);
                 moduleArg = ts.createAssignment(localName, moduleArg);
             }
-            //  (function (x_1) {
-            //      x_1.y = ...;
-            //  })(x || (x = {}));
-            var moduleStatement = ts.createStatement(ts.createCall(ts.createFunctionExpression(
-            /*modifiers*/ undefined, 
-            /*asteriskToken*/ undefined, 
-            /*name*/ undefined, 
-            /*typeParameters*/ undefined, [ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, parameterName)], 
-            /*type*/ undefined, transformModuleBody(node, containerName)), 
-            /*typeArguments*/ undefined, [moduleArg]));
+            var moduleStatement = ts.createStatement(ts.createCall(ts.createFunctionExpression(undefined, undefined, undefined, undefined, [ts.createParameter(undefined, undefined, undefined, parameterName)], undefined, transformModuleBody(node, containerName)), undefined, [moduleArg]));
             ts.setOriginalNode(moduleStatement, node);
             ts.setTextRange(moduleStatement, node);
             ts.setEmitFlags(moduleStatement, emitFlags);
             statements.push(moduleStatement);
-            // Add a DeclarationMarker for the namespace to preserve trailing comments and mark
-            // the end of the declaration.
             statements.push(ts.createEndOfDeclarationMarker(node));
             return statements;
         }
-        /**
-         * Transforms the body of a module declaration.
-         *
-         * @param node The module declaration node.
-         */
         function transformModuleBody(node, namespaceLocalName) {
             var savedCurrentNamespaceContainerName = currentNamespaceContainerName;
             var savedCurrentNamespace = currentNamespace;
@@ -63485,7 +52375,7 @@ var ts;
             var statementsLocation;
             var blockLocation;
             var body = node.body;
-            if (body.kind === 240 /* ModuleBlock */) {
+            if (body.kind === 240) {
                 saveStateAndInvoke(body, function (body) { return ts.addRange(statements, ts.visitNodes(body.statements, namespaceElementVisitor, ts.isStatement)); });
                 statementsLocation = body.statements;
                 blockLocation = body;
@@ -63507,172 +52397,76 @@ var ts;
             currentNamespaceContainerName = savedCurrentNamespaceContainerName;
             currentNamespace = savedCurrentNamespace;
             currentScopeFirstDeclarationsOfName = savedCurrentScopeFirstDeclarationsOfName;
-            var block = ts.createBlock(ts.setTextRange(ts.createNodeArray(statements), 
-            /*location*/ statementsLocation), 
-            /*multiLine*/ true);
+            var block = ts.createBlock(ts.setTextRange(ts.createNodeArray(statements), statementsLocation), true);
             ts.setTextRange(block, blockLocation);
-            // namespace hello.hi.world {
-            //      function foo() {}
-            //
-            //      // TODO, blah
-            // }
-            //
-            // should be emitted as
-            //
-            // var hello;
-            // (function (hello) {
-            //     var hi;
-            //     (function (hi) {
-            //         var world;
-            //         (function (world) {
-            //             function foo() { }
-            //             // TODO, blah
-            //         })(world = hi.world || (hi.world = {}));
-            //     })(hi = hello.hi || (hello.hi = {}));
-            // })(hello || (hello = {}));
-            // We only want to emit comment on the namespace which contains block body itself, not the containing namespaces.
-            if (body.kind !== 240 /* ModuleBlock */) {
-                ts.setEmitFlags(block, ts.getEmitFlags(block) | 1536 /* NoComments */);
+            if (body.kind !== 240) {
+                ts.setEmitFlags(block, ts.getEmitFlags(block) | 1536);
             }
             return block;
         }
         function getInnerMostModuleDeclarationFromDottedModule(moduleDeclaration) {
-            if (moduleDeclaration.body.kind === 239 /* ModuleDeclaration */) {
+            if (moduleDeclaration.body.kind === 239) {
                 var recursiveInnerModule = getInnerMostModuleDeclarationFromDottedModule(moduleDeclaration.body);
                 return recursiveInnerModule || moduleDeclaration.body;
             }
         }
-        /**
-         * Visits an import declaration, eliding it if it is not referenced.
-         *
-         * @param node The import declaration node.
-         */
         function visitImportDeclaration(node) {
             if (!node.importClause) {
-                // Do not elide a side-effect only import declaration.
-                //  import "foo";
                 return node;
             }
-            // Elide the declaration if the import clause was elided.
             var importClause = ts.visitNode(node.importClause, visitImportClause, ts.isImportClause);
             return importClause
-                ? ts.updateImportDeclaration(node, 
-                /*decorators*/ undefined, 
-                /*modifiers*/ undefined, importClause, node.moduleSpecifier)
+                ? ts.updateImportDeclaration(node, undefined, undefined, importClause, node.moduleSpecifier)
                 : undefined;
         }
-        /**
-         * Visits an import clause, eliding it if it is not referenced.
-         *
-         * @param node The import clause node.
-         */
         function visitImportClause(node) {
-            // Elide the import clause if we elide both its name and its named bindings.
             var name = resolver.isReferencedAliasDeclaration(node) ? node.name : undefined;
             var namedBindings = ts.visitNode(node.namedBindings, visitNamedImportBindings, ts.isNamedImportBindings);
             return (name || namedBindings) ? ts.updateImportClause(node, name, namedBindings) : undefined;
         }
-        /**
-         * Visits named import bindings, eliding it if it is not referenced.
-         *
-         * @param node The named import bindings node.
-         */
         function visitNamedImportBindings(node) {
-            if (node.kind === 246 /* NamespaceImport */) {
-                // Elide a namespace import if it is not referenced.
+            if (node.kind === 246) {
                 return resolver.isReferencedAliasDeclaration(node) ? node : undefined;
             }
             else {
-                // Elide named imports if all of its import specifiers are elided.
                 var elements = ts.visitNodes(node.elements, visitImportSpecifier, ts.isImportSpecifier);
                 return ts.some(elements) ? ts.updateNamedImports(node, elements) : undefined;
             }
         }
-        /**
-         * Visits an import specifier, eliding it if it is not referenced.
-         *
-         * @param node The import specifier node.
-         */
         function visitImportSpecifier(node) {
-            // Elide an import specifier if it is not referenced.
             return resolver.isReferencedAliasDeclaration(node) ? node : undefined;
         }
-        /**
-         * Visits an export assignment, eliding it if it does not contain a clause that resolves
-         * to a value.
-         *
-         * @param node The export assignment node.
-         */
         function visitExportAssignment(node) {
-            // Elide the export assignment if it does not reference a value.
             return resolver.isValueAliasDeclaration(node)
                 ? ts.visitEachChild(node, visitor, context)
                 : undefined;
         }
-        /**
-         * Visits an export declaration, eliding it if it does not contain a clause that resolves
-         * to a value.
-         *
-         * @param node The export declaration node.
-         */
         function visitExportDeclaration(node) {
             if (!node.exportClause) {
-                // Elide a star export if the module it references does not export a value.
                 return compilerOptions.isolatedModules || resolver.moduleExportsSomeValue(node.moduleSpecifier) ? node : undefined;
             }
             if (!resolver.isValueAliasDeclaration(node)) {
-                // Elide the export declaration if it does not export a value.
                 return undefined;
             }
-            // Elide the export declaration if all of its named exports are elided.
             var exportClause = ts.visitNode(node.exportClause, visitNamedExports, ts.isNamedExports);
             return exportClause
-                ? ts.updateExportDeclaration(node, 
-                /*decorators*/ undefined, 
-                /*modifiers*/ undefined, exportClause, node.moduleSpecifier)
+                ? ts.updateExportDeclaration(node, undefined, undefined, exportClause, node.moduleSpecifier)
                 : undefined;
         }
-        /**
-         * Visits named exports, eliding it if it does not contain an export specifier that
-         * resolves to a value.
-         *
-         * @param node The named exports node.
-         */
         function visitNamedExports(node) {
-            // Elide the named exports if all of its export specifiers were elided.
             var elements = ts.visitNodes(node.elements, visitExportSpecifier, ts.isExportSpecifier);
             return ts.some(elements) ? ts.updateNamedExports(node, elements) : undefined;
         }
-        /**
-         * Visits an export specifier, eliding it if it does not resolve to a value.
-         *
-         * @param node The export specifier node.
-         */
         function visitExportSpecifier(node) {
-            // Elide an export specifier if it does not reference a value.
             return resolver.isValueAliasDeclaration(node) ? node : undefined;
         }
-        /**
-         * Determines whether to emit an import equals declaration.
-         *
-         * @param node The import equals declaration node.
-         */
         function shouldEmitImportEqualsDeclaration(node) {
-            // preserve old compiler's behavior: emit 'var' for import declaration (even if we do not consider them referenced) when
-            // - current file is not external module
-            // - import declaration is top level and target is value imported by entity name
             return resolver.isReferencedAliasDeclaration(node)
                 || (!ts.isExternalModule(currentSourceFile)
                     && resolver.isTopLevelValueImportEqualsWithEntityName(node));
         }
-        /**
-         * Visits an import equals declaration.
-         *
-         * @param node The import equals declaration node.
-         */
         function visitImportEqualsDeclaration(node) {
             if (ts.isExternalModuleImportEqualsDeclaration(node)) {
-                // Elide external module `import=` if it is not referenced.
                 return resolver.isReferencedAliasDeclaration(node)
                     ? ts.visitEachChild(node, visitor, context)
                     : undefined;
@@ -63681,98 +52475,59 @@ var ts;
                 return undefined;
             }
             var moduleReference = ts.createExpressionFromEntityName(node.moduleReference);
-            ts.setEmitFlags(moduleReference, 1536 /* NoComments */ | 2048 /* NoNestedComments */);
+            ts.setEmitFlags(moduleReference, 1536 | 2048);
             if (isNamedExternalModuleExport(node) || !isExportOfNamespace(node)) {
-                //  export var ${name} = ${moduleReference};
-                //  var ${name} = ${moduleReference};
                 return ts.setOriginalNode(ts.setTextRange(ts.createVariableStatement(ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), ts.createVariableDeclarationList([
-                    ts.setOriginalNode(ts.createVariableDeclaration(node.name, 
-                    /*type*/ undefined, moduleReference), node)
+                    ts.setOriginalNode(ts.createVariableDeclaration(node.name, undefined, moduleReference), node)
                 ])), node), node);
             }
             else {
-                // exports.${name} = ${moduleReference};
                 return ts.setOriginalNode(createNamespaceExport(node.name, moduleReference, node), node);
             }
         }
-        /**
-         * Gets a value indicating whether the node is exported from a namespace.
-         *
-         * @param node The node to test.
-         */
         function isExportOfNamespace(node) {
-            return currentNamespace !== undefined && ts.hasModifier(node, 1 /* Export */);
+            return currentNamespace !== undefined && ts.hasModifier(node, 1);
         }
-        /**
-         * Gets a value indicating whether the node is exported from an external module.
-         *
-         * @param node The node to test.
-         */
         function isExternalModuleExport(node) {
-            return currentNamespace === undefined && ts.hasModifier(node, 1 /* Export */);
+            return currentNamespace === undefined && ts.hasModifier(node, 1);
         }
-        /**
-         * Gets a value indicating whether the node is a named export from an external module.
-         *
-         * @param node The node to test.
-         */
         function isNamedExternalModuleExport(node) {
             return isExternalModuleExport(node)
-                && !ts.hasModifier(node, 512 /* Default */);
+                && !ts.hasModifier(node, 512);
         }
-        /**
-         * Gets a value indicating whether the node is the default export of an external module.
-         *
-         * @param node The node to test.
-         */
         function isDefaultExternalModuleExport(node) {
             return isExternalModuleExport(node)
-                && ts.hasModifier(node, 512 /* Default */);
+                && ts.hasModifier(node, 512);
         }
-        /**
-         * Creates a statement for the provided expression. This is used in calls to `map`.
-         */
         function expressionToStatement(expression) {
             return ts.createStatement(expression);
         }
         function addExportMemberAssignment(statements, node) {
-            var expression = ts.createAssignment(ts.getExternalModuleOrNamespaceExportName(currentNamespaceContainerName, node, /*allowComments*/ false, /*allowSourceMaps*/ true), ts.getLocalName(node));
+            var expression = ts.createAssignment(ts.getExternalModuleOrNamespaceExportName(currentNamespaceContainerName, node, false, true), ts.getLocalName(node));
             ts.setSourceMapRange(expression, ts.createRange(node.name ? node.name.pos : node.pos, node.end));
             var statement = ts.createStatement(expression);
             ts.setSourceMapRange(statement, ts.createRange(-1, node.end));
             statements.push(statement);
         }
         function createNamespaceExport(exportName, exportValue, location) {
-            return ts.setTextRange(ts.createStatement(ts.createAssignment(ts.getNamespaceMemberName(currentNamespaceContainerName, exportName, /*allowComments*/ false, /*allowSourceMaps*/ true), exportValue)), location);
+            return ts.setTextRange(ts.createStatement(ts.createAssignment(ts.getNamespaceMemberName(currentNamespaceContainerName, exportName, false, true), exportValue)), location);
         }
         function createNamespaceExportExpression(exportName, exportValue, location) {
             return ts.setTextRange(ts.createAssignment(getNamespaceMemberNameWithSourceMapsAndWithoutComments(exportName), exportValue), location);
         }
         function getNamespaceMemberNameWithSourceMapsAndWithoutComments(name) {
-            return ts.getNamespaceMemberName(currentNamespaceContainerName, name, /*allowComments*/ false, /*allowSourceMaps*/ true);
+            return ts.getNamespaceMemberName(currentNamespaceContainerName, name, false, true);
         }
-        /**
-         * Gets the declaration name used inside of a namespace or enum.
-         */
         function getNamespaceParameterName(node) {
             var name = ts.getGeneratedNameForNode(node);
             ts.setSourceMapRange(name, node.name);
             return name;
         }
-        /**
-         * Gets the expression used to refer to a namespace or enum within the body
-         * of its declaration.
-         */
         function getNamespaceContainerName(node) {
             return ts.getGeneratedNameForNode(node);
         }
-        /**
-         * Gets a local alias for a class declaration if it is a decorated class with an internal
-         * reference to the static side of the class. This is necessary to avoid issues with
-         * double-binding semantics for the class name.
-         */
         function getClassAliasIfNeeded(node) {
-            if (resolver.getNodeCheckFlags(node) & 8388608 /* ClassWithConstructorReference */) {
+            if (resolver.getNodeCheckFlags(node) & 8388608) {
                 enableSubstitutionForClassAliases();
                 var classAlias = ts.createUniqueName(node.name && !ts.isGeneratedIdentifier(node.name) ? ts.idText(node.name) : "default");
                 classAliases[ts.getOriginalNodeId(node)] = classAlias;
@@ -63784,75 +52539,56 @@ var ts;
             return ts.createPropertyAccess(ts.getDeclarationName(node), "prototype");
         }
         function getClassMemberPrefix(node, member) {
-            return ts.hasModifier(member, 32 /* Static */)
+            return ts.hasModifier(member, 32)
                 ? ts.getDeclarationName(node)
                 : getClassPrototype(node);
         }
         function enableSubstitutionForNonQualifiedEnumMembers() {
-            if ((enabledSubstitutions & 8 /* NonQualifiedEnumMembers */) === 0) {
-                enabledSubstitutions |= 8 /* NonQualifiedEnumMembers */;
-                context.enableSubstitution(71 /* Identifier */);
+            if ((enabledSubstitutions & 8) === 0) {
+                enabledSubstitutions |= 8;
+                context.enableSubstitution(71);
             }
         }
         function enableSubstitutionForClassAliases() {
-            if ((enabledSubstitutions & 1 /* ClassAliases */) === 0) {
-                enabledSubstitutions |= 1 /* ClassAliases */;
-                // We need to enable substitutions for identifiers. This allows us to
-                // substitute class names inside of a class declaration.
-                context.enableSubstitution(71 /* Identifier */);
-                // Keep track of class aliases.
+            if ((enabledSubstitutions & 1) === 0) {
+                enabledSubstitutions |= 1;
+                context.enableSubstitution(71);
                 classAliases = [];
             }
         }
         function enableSubstitutionForNamespaceExports() {
-            if ((enabledSubstitutions & 2 /* NamespaceExports */) === 0) {
-                enabledSubstitutions |= 2 /* NamespaceExports */;
-                // We need to enable substitutions for identifiers and shorthand property assignments. This allows us to
-                // substitute the names of exported members of a namespace.
-                context.enableSubstitution(71 /* Identifier */);
-                context.enableSubstitution(271 /* ShorthandPropertyAssignment */);
-                // We need to be notified when entering and exiting namespaces.
-                context.enableEmitNotification(239 /* ModuleDeclaration */);
+            if ((enabledSubstitutions & 2) === 0) {
+                enabledSubstitutions |= 2;
+                context.enableSubstitution(71);
+                context.enableSubstitution(271);
+                context.enableEmitNotification(239);
             }
         }
         function isTransformedModuleDeclaration(node) {
-            return ts.getOriginalNode(node).kind === 239 /* ModuleDeclaration */;
+            return ts.getOriginalNode(node).kind === 239;
         }
         function isTransformedEnumDeclaration(node) {
-            return ts.getOriginalNode(node).kind === 238 /* EnumDeclaration */;
-        }
-        /**
-         * Hook for node emit.
-         *
-         * @param hint A hint as to the intended usage of the node.
-         * @param node The node to emit.
-         * @param emit A callback used to emit the node in the printer.
-         */
+            return ts.getOriginalNode(node).kind === 238;
+        }
         function onEmitNode(hint, node, emitCallback) {
             var savedApplicableSubstitutions = applicableSubstitutions;
             var savedCurrentSourceFile = currentSourceFile;
             if (ts.isSourceFile(node)) {
                 currentSourceFile = node;
             }
-            if (enabledSubstitutions & 2 /* NamespaceExports */ && isTransformedModuleDeclaration(node)) {
-                applicableSubstitutions |= 2 /* NamespaceExports */;
+            if (enabledSubstitutions & 2 && isTransformedModuleDeclaration(node)) {
+                applicableSubstitutions |= 2;
             }
-            if (enabledSubstitutions & 8 /* NonQualifiedEnumMembers */ && isTransformedEnumDeclaration(node)) {
-                applicableSubstitutions |= 8 /* NonQualifiedEnumMembers */;
+            if (enabledSubstitutions & 8 && isTransformedEnumDeclaration(node)) {
+                applicableSubstitutions |= 8;
             }
             previousOnEmitNode(hint, node, emitCallback);
             applicableSubstitutions = savedApplicableSubstitutions;
             currentSourceFile = savedCurrentSourceFile;
         }
-        /**
-         * Hooks node substitutions.
-         *
-         * @param hint A hint as to the intended usage of the node.
-         * @param node The node to substitute.
-         */
         function onSubstituteNode(hint, node) {
             node = previousOnSubstituteNode(hint, node);
-            if (hint === 1 /* Expression */) {
+            if (hint === 1) {
                 return substituteExpression(node);
             }
             else if (ts.isShorthandPropertyAssignment(node)) {
@@ -63861,12 +52597,10 @@ var ts;
             return node;
         }
         function substituteShorthandPropertyAssignment(node) {
-            if (enabledSubstitutions & 2 /* NamespaceExports */) {
+            if (enabledSubstitutions & 2) {
                 var name = node.name;
                 var exportedName = trySubstituteNamespaceExportedName(name);
                 if (exportedName) {
-                    // A shorthand property with an assignment initializer is probably part of a
-                    // destructuring assignment
                     if (node.objectAssignmentInitializer) {
                         var initializer = ts.createAssignment(exportedName, node.objectAssignmentInitializer);
                         return ts.setTextRange(ts.createPropertyAssignment(name, initializer), node);
@@ -63878,11 +52612,11 @@ var ts;
         }
         function substituteExpression(node) {
             switch (node.kind) {
-                case 71 /* Identifier */:
+                case 71:
                     return substituteExpressionIdentifier(node);
-                case 185 /* PropertyAccessExpression */:
+                case 185:
                     return substitutePropertyAccessExpression(node);
-                case 186 /* ElementAccessExpression */:
+                case 186:
                     return substituteElementAccessExpression(node);
             }
             return node;
@@ -63893,16 +52627,11 @@ var ts;
                 || node;
         }
         function trySubstituteClassAlias(node) {
-            if (enabledSubstitutions & 1 /* ClassAliases */) {
-                if (resolver.getNodeCheckFlags(node) & 16777216 /* ConstructorReferenceInClass */) {
-                    // Due to the emit for class decorators, any reference to the class from inside of the class body
-                    // must instead be rewritten to point to a temporary variable to avoid issues with the double-bind
-                    // behavior of class names in ES6.
-                    // Also, when emitting statics for class expressions, we must substitute a class alias for
-                    // constructor references in static property initializers.
+            if (enabledSubstitutions & 1) {
+                if (resolver.getNodeCheckFlags(node) & 16777216) {
                     var declaration = resolver.getReferencedValueDeclaration(node);
                     if (declaration) {
-                        var classAlias = classAliases[declaration.id]; // TODO: GH#18217
+                        var classAlias = classAliases[declaration.id];
                         if (classAlias) {
                             var clone_1 = ts.getSynthesizedClone(classAlias);
                             ts.setSourceMapRange(clone_1, node);
@@ -63915,17 +52644,13 @@ var ts;
             return undefined;
         }
         function trySubstituteNamespaceExportedName(node) {
-            // If this is explicitly a local name, do not substitute.
             if (enabledSubstitutions & applicableSubstitutions && !ts.isGeneratedIdentifier(node) && !ts.isLocalName(node)) {
-                // If we are nested within a namespace declaration, we may need to qualifiy
-                // an identifier that is exported from a merged namespace.
-                var container = resolver.getReferencedExportContainer(node, /*prefixLocals*/ false);
-                if (container && container.kind !== 274 /* SourceFile */) {
-                    var substitute = (applicableSubstitutions & 2 /* NamespaceExports */ && container.kind === 239 /* ModuleDeclaration */) ||
-                        (applicableSubstitutions & 8 /* NonQualifiedEnumMembers */ && container.kind === 238 /* EnumDeclaration */);
+                var container = resolver.getReferencedExportContainer(node, false);
+                if (container && container.kind !== 274) {
+                    var substitute = (applicableSubstitutions & 2 && container.kind === 239) ||
+                        (applicableSubstitutions & 8 && container.kind === 238);
                     if (substitute) {
-                        return ts.setTextRange(ts.createPropertyAccess(ts.getGeneratedNameForNode(container), node), 
-                        /*location*/ node);
+                        return ts.setTextRange(ts.createPropertyAccess(ts.getGeneratedNameForNode(container), node), node);
                     }
                 }
             }
@@ -63940,14 +52665,13 @@ var ts;
         function substituteConstantValue(node) {
             var constantValue = tryGetConstEnumValue(node);
             if (constantValue !== undefined) {
-                // track the constant value on the node for the printer in needsDotDotForPropertyAccess
                 ts.setConstantValue(node, constantValue);
                 var substitute = ts.createLiteral(constantValue);
                 if (!compilerOptions.removeComments) {
                     var propertyName = ts.isPropertyAccessExpression(node)
                         ? ts.declarationNameToString(node.name)
                         : ts.getTextOfNode(node.argumentExpression);
-                    ts.addSyntheticTrailingComment(substitute, 3 /* MultiLineCommentTrivia */, " " + propertyName + " ");
+                    ts.addSyntheticTrailingComment(substitute, 3, " " + propertyName + " ");
                 }
                 return substitute;
             }
@@ -63963,7 +52687,7 @@ var ts;
     ts.transformTypeScript = transformTypeScript;
     function createDecorateHelper(context, decoratorExpressions, target, memberName, descriptor, location) {
         var argumentsArray = [];
-        argumentsArray.push(ts.createArrayLiteral(decoratorExpressions, /*multiLine*/ true));
+        argumentsArray.push(ts.createArrayLiteral(decoratorExpressions, true));
         argumentsArray.push(target);
         if (memberName) {
             argumentsArray.push(memberName);
@@ -63972,8 +52696,7 @@ var ts;
             }
         }
         context.requestEmitHelper(decorateHelper);
-        return ts.setTextRange(ts.createCall(ts.getHelperName("__decorate"), 
-        /*typeArguments*/ undefined, argumentsArray), location);
+        return ts.setTextRange(ts.createCall(ts.getHelperName("__decorate"), undefined, argumentsArray), location);
     }
     var decorateHelper = {
         name: "typescript:decorate",
@@ -63983,8 +52706,7 @@ var ts;
     };
     function createMetadataHelper(context, metadataKey, metadataValue) {
         context.requestEmitHelper(metadataHelper);
-        return ts.createCall(ts.getHelperName("__metadata"), 
-        /*typeArguments*/ undefined, [
+        return ts.createCall(ts.getHelperName("__metadata"), undefined, [
             ts.createLiteral(metadataKey),
             metadataValue
         ]);
@@ -63997,8 +52719,7 @@ var ts;
     };
     function createParamHelper(context, expression, parameterOffset, location) {
         context.requestEmitHelper(paramHelper);
-        return ts.setTextRange(ts.createCall(ts.getHelperName("__param"), 
-        /*typeArguments*/ undefined, [
+        return ts.setTextRange(ts.createCall(ts.getHelperName("__param"), undefined, [
             ts.createLiteral(parameterOffset),
             expression
         ]), location);
@@ -64010,34 +52731,18 @@ var ts;
         text: "\n            var __param = (this && this.__param) || function (paramIndex, decorator) {\n                return function (target, key) { decorator(target, key, paramIndex); }\n            };"
     };
 })(ts || (ts = {}));
-/*@internal*/
 var ts;
 (function (ts) {
-    var ES2017SubstitutionFlags;
-    (function (ES2017SubstitutionFlags) {
-        /** Enables substitutions for async methods with `super` calls. */
-        ES2017SubstitutionFlags[ES2017SubstitutionFlags["AsyncMethodsWithSuper"] = 1] = "AsyncMethodsWithSuper";
-    })(ES2017SubstitutionFlags || (ES2017SubstitutionFlags = {}));
     function transformES2017(context) {
         var resumeLexicalEnvironment = context.resumeLexicalEnvironment, endLexicalEnvironment = context.endLexicalEnvironment, hoistVariableDeclaration = context.hoistVariableDeclaration;
         var resolver = context.getEmitResolver();
         var compilerOptions = context.getCompilerOptions();
         var languageVersion = ts.getEmitScriptTarget(compilerOptions);
-        /**
-         * Keeps track of whether expression substitution has been enabled for specific edge cases.
-         * They are persisted between each SourceFile transformation and should not be reset.
-         */
         var enabledSubstitutions;
-        /**
-         * This keeps track of containers where `super` is valid, for use with
-         * just-in-time substitution for `super` expressions inside of async methods.
-         */
         var enclosingSuperContainerFlags = 0;
         var enclosingFunctionParameterNames;
-        // Save the previous transformation hooks.
         var previousOnEmitNode = context.onEmitNode;
         var previousOnSubstituteNode = context.onSubstituteNode;
-        // Set new transformation hooks.
         context.onEmitNode = onEmitNode;
         context.onSubstituteNode = onSubstituteNode;
         return ts.chainBundle(transformSourceFile);
@@ -64050,22 +52755,21 @@ var ts;
             return visited;
         }
         function visitor(node) {
-            if ((node.transformFlags & 16 /* ContainsES2017 */) === 0) {
+            if ((node.transformFlags & 16) === 0) {
                 return node;
             }
             switch (node.kind) {
-                case 120 /* AsyncKeyword */:
-                    // ES2017 async modifier should be elided for targets < ES2017
+                case 120:
                     return undefined;
-                case 197 /* AwaitExpression */:
+                case 197:
                     return visitAwaitExpression(node);
-                case 154 /* MethodDeclaration */:
+                case 154:
                     return visitMethodDeclaration(node);
-                case 234 /* FunctionDeclaration */:
+                case 234:
                     return visitFunctionDeclaration(node);
-                case 192 /* FunctionExpression */:
+                case 192:
                     return visitFunctionExpression(node);
-                case 193 /* ArrowFunction */:
+                case 193:
                     return visitArrowFunction(node);
                 default:
                     return ts.visitEachChild(node, visitor, context);
@@ -64074,27 +52778,27 @@ var ts;
         function asyncBodyVisitor(node) {
             if (ts.isNodeWithPossibleHoistedDeclaration(node)) {
                 switch (node.kind) {
-                    case 214 /* VariableStatement */:
+                    case 214:
                         return visitVariableStatementInAsyncBody(node);
-                    case 220 /* ForStatement */:
+                    case 220:
                         return visitForStatementInAsyncBody(node);
-                    case 221 /* ForInStatement */:
+                    case 221:
                         return visitForInStatementInAsyncBody(node);
-                    case 222 /* ForOfStatement */:
+                    case 222:
                         return visitForOfStatementInAsyncBody(node);
-                    case 269 /* CatchClause */:
+                    case 269:
                         return visitCatchClauseInAsyncBody(node);
-                    case 213 /* Block */:
-                    case 227 /* SwitchStatement */:
-                    case 241 /* CaseBlock */:
-                    case 266 /* CaseClause */:
-                    case 267 /* DefaultClause */:
-                    case 230 /* TryStatement */:
-                    case 218 /* DoStatement */:
-                    case 219 /* WhileStatement */:
-                    case 217 /* IfStatement */:
-                    case 226 /* WithStatement */:
-                    case 228 /* LabeledStatement */:
+                    case 213:
+                    case 227:
+                    case 241:
+                    case 266:
+                    case 267:
+                    case 230:
+                    case 218:
+                    case 219:
+                    case 217:
+                    case 226:
+                    case 228:
                         return ts.visitEachChild(node, asyncBodyVisitor, context);
                     default:
                         return ts.Debug.assertNever(node, "Unhandled node.");
@@ -64104,8 +52808,7 @@ var ts;
         }
         function visitCatchClauseInAsyncBody(node) {
             var catchClauseNames = ts.createUnderscoreEscapedMap();
-            recordDeclarationName(node.variableDeclaration, catchClauseNames); // TODO: GH#18217
-            // names declared in a catch variable are block scoped
+            recordDeclarationName(node.variableDeclaration, catchClauseNames);
             var catchClauseUnshadowedNames;
             catchClauseNames.forEach(function (_, escapedName) {
                 if (enclosingFunctionParameterNames.has(escapedName)) {
@@ -64128,98 +52831,47 @@ var ts;
         }
         function visitVariableStatementInAsyncBody(node) {
             if (isVariableDeclarationListWithCollidingName(node.declarationList)) {
-                var expression = visitVariableDeclarationListWithCollidingNames(node.declarationList, /*hasReceiver*/ false);
+                var expression = visitVariableDeclarationListWithCollidingNames(node.declarationList, false);
                 return expression ? ts.createStatement(expression) : undefined;
             }
             return ts.visitEachChild(node, visitor, context);
         }
         function visitForInStatementInAsyncBody(node) {
             return ts.updateForIn(node, isVariableDeclarationListWithCollidingName(node.initializer)
-                ? visitVariableDeclarationListWithCollidingNames(node.initializer, /*hasReceiver*/ true)
+                ? visitVariableDeclarationListWithCollidingNames(node.initializer, true)
                 : ts.visitNode(node.initializer, visitor, ts.isForInitializer), ts.visitNode(node.expression, visitor, ts.isExpression), ts.visitNode(node.statement, asyncBodyVisitor, ts.isStatement, ts.liftToBlock));
         }
         function visitForOfStatementInAsyncBody(node) {
             return ts.updateForOf(node, ts.visitNode(node.awaitModifier, visitor, ts.isToken), isVariableDeclarationListWithCollidingName(node.initializer)
-                ? visitVariableDeclarationListWithCollidingNames(node.initializer, /*hasReceiver*/ true)
+                ? visitVariableDeclarationListWithCollidingNames(node.initializer, true)
                 : ts.visitNode(node.initializer, visitor, ts.isForInitializer), ts.visitNode(node.expression, visitor, ts.isExpression), ts.visitNode(node.statement, asyncBodyVisitor, ts.isStatement, ts.liftToBlock));
         }
         function visitForStatementInAsyncBody(node) {
-            var initializer = node.initializer; // TODO: GH#18217
+            var initializer = node.initializer;
             return ts.updateFor(node, isVariableDeclarationListWithCollidingName(initializer)
-                ? visitVariableDeclarationListWithCollidingNames(initializer, /*hasReceiver*/ false)
+                ? visitVariableDeclarationListWithCollidingNames(initializer, false)
                 : ts.visitNode(node.initializer, visitor, ts.isForInitializer), ts.visitNode(node.condition, visitor, ts.isExpression), ts.visitNode(node.incrementor, visitor, ts.isExpression), ts.visitNode(node.statement, asyncBodyVisitor, ts.isStatement, ts.liftToBlock));
         }
-        /**
-         * Visits an AwaitExpression node.
-         *
-         * This function will be called any time a ES2017 await expression is encountered.
-         *
-         * @param node The node to visit.
-         */
         function visitAwaitExpression(node) {
-            return ts.setOriginalNode(ts.setTextRange(ts.createYield(
-            /*asteriskToken*/ undefined, ts.visitNode(node.expression, visitor, ts.isExpression)), node), node);
-        }
-        /**
-         * Visits a MethodDeclaration node.
-         *
-         * This function will be called when one of the following conditions are met:
-         * - The node is marked as async
-         *
-         * @param node The node to visit.
-         */
+            return ts.setOriginalNode(ts.setTextRange(ts.createYield(undefined, ts.visitNode(node.expression, visitor, ts.isExpression)), node), node);
+        }
         function visitMethodDeclaration(node) {
-            return ts.updateMethod(node, 
-            /*decorators*/ undefined, ts.visitNodes(node.modifiers, visitor, ts.isModifier), node.asteriskToken, node.name, 
-            /*questionToken*/ undefined, 
-            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
-            /*type*/ undefined, ts.getFunctionFlags(node) & 2 /* Async */
+            return ts.updateMethod(node, undefined, ts.visitNodes(node.modifiers, visitor, ts.isModifier), node.asteriskToken, node.name, undefined, undefined, ts.visitParameterList(node.parameters, visitor, context), undefined, ts.getFunctionFlags(node) & 2
                 ? transformAsyncFunctionBody(node)
                 : ts.visitFunctionBody(node.body, visitor, context));
         }
-        /**
-         * Visits a FunctionDeclaration node.
-         *
-         * This function will be called when one of the following conditions are met:
-         * - The node is marked async
-         *
-         * @param node The node to visit.
-         */
         function visitFunctionDeclaration(node) {
-            return ts.updateFunctionDeclaration(node, 
-            /*decorators*/ undefined, ts.visitNodes(node.modifiers, visitor, ts.isModifier), node.asteriskToken, node.name, 
-            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
-            /*type*/ undefined, ts.getFunctionFlags(node) & 2 /* Async */
+            return ts.updateFunctionDeclaration(node, undefined, ts.visitNodes(node.modifiers, visitor, ts.isModifier), node.asteriskToken, node.name, undefined, ts.visitParameterList(node.parameters, visitor, context), undefined, ts.getFunctionFlags(node) & 2
                 ? transformAsyncFunctionBody(node)
                 : ts.visitFunctionBody(node.body, visitor, context));
         }
-        /**
-         * Visits a FunctionExpression node.
-         *
-         * This function will be called when one of the following conditions are met:
-         * - The node is marked async
-         *
-         * @param node The node to visit.
-         */
         function visitFunctionExpression(node) {
-            return ts.updateFunctionExpression(node, ts.visitNodes(node.modifiers, visitor, ts.isModifier), node.asteriskToken, node.name, 
-            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
-            /*type*/ undefined, ts.getFunctionFlags(node) & 2 /* Async */
+            return ts.updateFunctionExpression(node, ts.visitNodes(node.modifiers, visitor, ts.isModifier), node.asteriskToken, node.name, undefined, ts.visitParameterList(node.parameters, visitor, context), undefined, ts.getFunctionFlags(node) & 2
                 ? transformAsyncFunctionBody(node)
                 : ts.visitFunctionBody(node.body, visitor, context));
         }
-        /**
-         * Visits an ArrowFunction.
-         *
-         * This function will be called when one of the following conditions are met:
-         * - The node is marked async
-         *
-         * @param node The node to visit.
-         */
         function visitArrowFunction(node) {
-            return ts.updateArrowFunction(node, ts.visitNodes(node.modifiers, visitor, ts.isModifier), 
-            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
-            /*type*/ undefined, node.equalsGreaterThanToken, ts.getFunctionFlags(node) & 2 /* Async */
+            return ts.updateArrowFunction(node, ts.visitNodes(node.modifiers, visitor, ts.isModifier), undefined, ts.visitParameterList(node.parameters, visitor, context), undefined, node.equalsGreaterThanToken, ts.getFunctionFlags(node) & 2
                 ? transformAsyncFunctionBody(node)
                 : ts.visitFunctionBody(node.body, visitor, context));
         }
@@ -64240,7 +52892,7 @@ var ts;
         function isVariableDeclarationListWithCollidingName(node) {
             return !!node
                 && ts.isVariableDeclarationList(node)
-                && !(node.flags & 3 /* BlockScoped */)
+                && !(node.flags & 3)
                 && node.declarations.some(collidesWithParameterName);
         }
         function visitVariableDeclarationListWithCollidingNames(node, hasReceiver) {
@@ -64294,14 +52946,9 @@ var ts;
             resumeLexicalEnvironment();
             var original = ts.getOriginalNode(node, ts.isFunctionLike);
             var nodeType = original.type;
-            var promiseConstructor = languageVersion < 2 /* ES2015 */ ? getPromiseConstructor(nodeType) : undefined;
-            var isArrowFunction = node.kind === 193 /* ArrowFunction */;
-            var hasLexicalArguments = (resolver.getNodeCheckFlags(node) & 8192 /* CaptureArguments */) !== 0;
-            // An async function is emit as an outer function that calls an inner
-            // generator function. To preserve lexical bindings, we pass the current
-            // `this` and `arguments` objects to `__awaiter`. The generator function
-            // passed to `__awaiter` is executed inside of the callback to the
-            // promise constructor.
+            var promiseConstructor = languageVersion < 2 ? getPromiseConstructor(nodeType) : undefined;
+            var isArrowFunction = node.kind === 193;
+            var hasLexicalArguments = (resolver.getNodeCheckFlags(node) & 8192) !== 0;
             var savedEnclosingFunctionParameterNames = enclosingFunctionParameterNames;
             enclosingFunctionParameterNames = ts.createUnderscoreEscapedMap();
             for (var _i = 0, _a = node.parameters; _i < _a.length; _i++) {
@@ -64311,19 +52958,17 @@ var ts;
             var result;
             if (!isArrowFunction) {
                 var statements = [];
-                var statementOffset = ts.addPrologue(statements, node.body.statements, /*ensureUseStrict*/ false, visitor);
+                var statementOffset = ts.addPrologue(statements, node.body.statements, false, visitor);
                 statements.push(ts.createReturn(createAwaiterHelper(context, hasLexicalArguments, promiseConstructor, transformAsyncFunctionBodyWorker(node.body, statementOffset))));
                 ts.prependStatements(statements, endLexicalEnvironment());
-                var block = ts.createBlock(statements, /*multiLine*/ true);
+                var block = ts.createBlock(statements, true);
                 ts.setTextRange(block, node.body);
-                // Minor optimization, emit `_super` helper to capture `super` access in an arrow.
-                // This step isn't needed if we eventually transform this to ES5.
-                if (languageVersion >= 2 /* ES2015 */) {
-                    if (resolver.getNodeCheckFlags(node) & 4096 /* AsyncMethodWithSuperBinding */) {
+                if (languageVersion >= 2) {
+                    if (resolver.getNodeCheckFlags(node) & 4096) {
                         enableSubstitutionForAsyncMethodsWithSuper();
                         ts.addEmitHelper(block, ts.advancedAsyncSuperHelper);
                     }
-                    else if (resolver.getNodeCheckFlags(node) & 2048 /* AsyncMethodWithSuper */) {
+                    else if (resolver.getNodeCheckFlags(node) & 2048) {
                         enableSubstitutionForAsyncMethodsWithSuper();
                         ts.addEmitHelper(block, ts.asyncSuperHelper);
                     }
@@ -64364,33 +53009,21 @@ var ts;
             return undefined;
         }
         function enableSubstitutionForAsyncMethodsWithSuper() {
-            if ((enabledSubstitutions & 1 /* AsyncMethodsWithSuper */) === 0) {
-                enabledSubstitutions |= 1 /* AsyncMethodsWithSuper */;
-                // We need to enable substitutions for call, property access, and element access
-                // if we need to rewrite super calls.
-                context.enableSubstitution(187 /* CallExpression */);
-                context.enableSubstitution(185 /* PropertyAccessExpression */);
-                context.enableSubstitution(186 /* ElementAccessExpression */);
-                // We need to be notified when entering and exiting declarations that bind super.
-                context.enableEmitNotification(235 /* ClassDeclaration */);
-                context.enableEmitNotification(154 /* MethodDeclaration */);
-                context.enableEmitNotification(156 /* GetAccessor */);
-                context.enableEmitNotification(157 /* SetAccessor */);
-                context.enableEmitNotification(155 /* Constructor */);
-            }
-        }
-        /**
-         * Hook for node emit.
-         *
-         * @param hint A hint as to the intended usage of the node.
-         * @param node The node to emit.
-         * @param emit A callback used to emit the node in the printer.
-         */
+            if ((enabledSubstitutions & 1) === 0) {
+                enabledSubstitutions |= 1;
+                context.enableSubstitution(187);
+                context.enableSubstitution(185);
+                context.enableSubstitution(186);
+                context.enableEmitNotification(235);
+                context.enableEmitNotification(154);
+                context.enableEmitNotification(156);
+                context.enableEmitNotification(157);
+                context.enableEmitNotification(155);
+            }
+        }
         function onEmitNode(hint, node, emitCallback) {
-            // If we need to support substitutions for `super` in an async method,
-            // we should track it here.
-            if (enabledSubstitutions & 1 /* AsyncMethodsWithSuper */ && isSuperContainer(node)) {
-                var superContainerFlags = resolver.getNodeCheckFlags(node) & (2048 /* AsyncMethodWithSuper */ | 4096 /* AsyncMethodWithSuperBinding */);
+            if (enabledSubstitutions & 1 && isSuperContainer(node)) {
+                var superContainerFlags = resolver.getNodeCheckFlags(node) & (2048 | 4096);
                 if (superContainerFlags !== enclosingSuperContainerFlags) {
                     var savedEnclosingSuperContainerFlags = enclosingSuperContainerFlags;
                     enclosingSuperContainerFlags = superContainerFlags;
@@ -64401,38 +53034,32 @@ var ts;
             }
             previousOnEmitNode(hint, node, emitCallback);
         }
-        /**
-         * Hooks node substitutions.
-         *
-         * @param hint A hint as to the intended usage of the node.
-         * @param node The node to substitute.
-         */
         function onSubstituteNode(hint, node) {
             node = previousOnSubstituteNode(hint, node);
-            if (hint === 1 /* Expression */ && enclosingSuperContainerFlags) {
+            if (hint === 1 && enclosingSuperContainerFlags) {
                 return substituteExpression(node);
             }
             return node;
         }
         function substituteExpression(node) {
             switch (node.kind) {
-                case 185 /* PropertyAccessExpression */:
+                case 185:
                     return substitutePropertyAccessExpression(node);
-                case 186 /* ElementAccessExpression */:
+                case 186:
                     return substituteElementAccessExpression(node);
-                case 187 /* CallExpression */:
+                case 187:
                     return substituteCallExpression(node);
             }
             return node;
         }
         function substitutePropertyAccessExpression(node) {
-            if (node.expression.kind === 97 /* SuperKeyword */) {
+            if (node.expression.kind === 97) {
                 return createSuperAccessInAsyncMethod(ts.createLiteral(ts.idText(node.name)), node);
             }
             return node;
         }
         function substituteElementAccessExpression(node) {
-            if (node.expression.kind === 97 /* SuperKeyword */) {
+            if (node.expression.kind === 97) {
                 return createSuperAccessInAsyncMethod(node.argumentExpression, node);
             }
             return node;
@@ -64443,8 +53070,7 @@ var ts;
                 var argumentExpression = ts.isPropertyAccessExpression(expression)
                     ? substitutePropertyAccessExpression(expression)
                     : substituteElementAccessExpression(expression);
-                return ts.createCall(ts.createPropertyAccess(argumentExpression, "call"), 
-                /*typeArguments*/ undefined, [
+                return ts.createCall(ts.createPropertyAccess(argumentExpression, "call"), undefined, [
                     ts.createThis()
                 ].concat(node.arguments));
             }
@@ -64452,20 +53078,18 @@ var ts;
         }
         function isSuperContainer(node) {
             var kind = node.kind;
-            return kind === 235 /* ClassDeclaration */
-                || kind === 155 /* Constructor */
-                || kind === 154 /* MethodDeclaration */
-                || kind === 156 /* GetAccessor */
-                || kind === 157 /* SetAccessor */;
+            return kind === 235
+                || kind === 155
+                || kind === 154
+                || kind === 156
+                || kind === 157;
         }
         function createSuperAccessInAsyncMethod(argumentExpression, location) {
-            if (enclosingSuperContainerFlags & 4096 /* AsyncMethodWithSuperBinding */) {
-                return ts.setTextRange(ts.createPropertyAccess(ts.createCall(ts.createFileLevelUniqueName("_super"), 
-                /*typeArguments*/ undefined, [argumentExpression]), "value"), location);
+            if (enclosingSuperContainerFlags & 4096) {
+                return ts.setTextRange(ts.createPropertyAccess(ts.createCall(ts.createFileLevelUniqueName("_super"), undefined, [argumentExpression]), "value"), location);
             }
             else {
-                return ts.setTextRange(ts.createCall(ts.createFileLevelUniqueName("_super"), 
-                /*typeArguments*/ undefined, [argumentExpression]), location);
+                return ts.setTextRange(ts.createCall(ts.createFileLevelUniqueName("_super"), undefined, [argumentExpression]), location);
             }
         }
     }
@@ -64478,16 +53102,9 @@ var ts;
     };
     function createAwaiterHelper(context, hasLexicalArguments, promiseConstructor, body) {
         context.requestEmitHelper(awaiterHelper);
-        var generatorFunc = ts.createFunctionExpression(
-        /*modifiers*/ undefined, ts.createToken(39 /* AsteriskToken */), 
-        /*name*/ undefined, 
-        /*typeParameters*/ undefined, 
-        /*parameters*/ [], 
-        /*type*/ undefined, body);
-        // Mark this node as originally an async function
-        (generatorFunc.emitNode || (generatorFunc.emitNode = {})).flags |= 262144 /* AsyncFunctionBody */ | 524288 /* ReuseTempVariableScope */;
-        return ts.createCall(ts.getHelperName("__awaiter"), 
-        /*typeArguments*/ undefined, [
+        var generatorFunc = ts.createFunctionExpression(undefined, ts.createToken(39), undefined, undefined, [], undefined, body);
+        (generatorFunc.emitNode || (generatorFunc.emitNode = {})).flags |= 262144 | 524288;
+        return ts.createCall(ts.getHelperName("__awaiter"), undefined, [
             ts.createThis(),
             hasLexicalArguments ? ts.createIdentifier("arguments") : ts.createVoidZero(),
             promiseConstructor ? ts.createExpressionFromEntityName(promiseConstructor) : ts.createVoidZero(),
@@ -64505,14 +53122,8 @@ var ts;
         text: ts.helperString(__makeTemplateObject(["\n            const ", " = (function (geti, seti) {\n                const cache = Object.create(null);\n                return name => cache[name] || (cache[name] = { get value() { return geti(name); }, set value(v) { seti(name, v); } });\n            })(name => super[name], (name, value) => super[name] = value);"], ["\n            const ", " = (function (geti, seti) {\n                const cache = Object.create(null);\n                return name => cache[name] || (cache[name] = { get value() { return geti(name); }, set value(v) { seti(name, v); } });\n            })(name => super[name], (name, value) => super[name] = value);"]), "_super")
     };
 })(ts || (ts = {}));
-/*@internal*/
 var ts;
 (function (ts) {
-    var ESNextSubstitutionFlags;
-    (function (ESNextSubstitutionFlags) {
-        /** Enables substitutions for async methods with `super` calls. */
-        ESNextSubstitutionFlags[ESNextSubstitutionFlags["AsyncMethodsWithSuper"] = 1] = "AsyncMethodsWithSuper";
-    })(ESNextSubstitutionFlags || (ESNextSubstitutionFlags = {}));
     function transformESNext(context) {
         var resumeLexicalEnvironment = context.resumeLexicalEnvironment, endLexicalEnvironment = context.endLexicalEnvironment, hoistVariableDeclaration = context.hoistVariableDeclaration;
         var resolver = context.getEmitResolver();
@@ -64535,77 +53146,76 @@ var ts;
             return visited;
         }
         function visitor(node) {
-            return visitorWorker(node, /*noDestructuringValue*/ false);
+            return visitorWorker(node, false);
         }
         function visitorNoDestructuringValue(node) {
-            return visitorWorker(node, /*noDestructuringValue*/ true);
+            return visitorWorker(node, true);
         }
         function visitorNoAsyncModifier(node) {
-            if (node.kind === 120 /* AsyncKeyword */) {
+            if (node.kind === 120) {
                 return undefined;
             }
             return node;
         }
         function visitorWorker(node, noDestructuringValue) {
-            if ((node.transformFlags & 8 /* ContainsESNext */) === 0) {
+            if ((node.transformFlags & 8) === 0) {
                 return node;
             }
             switch (node.kind) {
-                case 197 /* AwaitExpression */:
+                case 197:
                     return visitAwaitExpression(node);
-                case 203 /* YieldExpression */:
+                case 203:
                     return visitYieldExpression(node);
-                case 225 /* ReturnStatement */:
+                case 225:
                     return visitReturnStatement(node);
-                case 228 /* LabeledStatement */:
+                case 228:
                     return visitLabeledStatement(node);
-                case 184 /* ObjectLiteralExpression */:
+                case 184:
                     return visitObjectLiteralExpression(node);
-                case 200 /* BinaryExpression */:
+                case 200:
                     return visitBinaryExpression(node, noDestructuringValue);
-                case 232 /* VariableDeclaration */:
+                case 232:
                     return visitVariableDeclaration(node);
-                case 222 /* ForOfStatement */:
-                    return visitForOfStatement(node, /*outermostLabeledStatement*/ undefined);
-                case 220 /* ForStatement */:
+                case 222:
+                    return visitForOfStatement(node, undefined);
+                case 220:
                     return visitForStatement(node);
-                case 196 /* VoidExpression */:
+                case 196:
                     return visitVoidExpression(node);
-                case 155 /* Constructor */:
+                case 155:
                     return visitConstructorDeclaration(node);
-                case 154 /* MethodDeclaration */:
+                case 154:
                     return visitMethodDeclaration(node);
-                case 156 /* GetAccessor */:
+                case 156:
                     return visitGetAccessorDeclaration(node);
-                case 157 /* SetAccessor */:
+                case 157:
                     return visitSetAccessorDeclaration(node);
-                case 234 /* FunctionDeclaration */:
+                case 234:
                     return visitFunctionDeclaration(node);
-                case 192 /* FunctionExpression */:
+                case 192:
                     return visitFunctionExpression(node);
-                case 193 /* ArrowFunction */:
+                case 193:
                     return visitArrowFunction(node);
-                case 149 /* Parameter */:
+                case 149:
                     return visitParameter(node);
-                case 216 /* ExpressionStatement */:
+                case 216:
                     return visitExpressionStatement(node);
-                case 191 /* ParenthesizedExpression */:
+                case 191:
                     return visitParenthesizedExpression(node, noDestructuringValue);
-                case 269 /* CatchClause */:
+                case 269:
                     return visitCatchClause(node);
                 default:
                     return ts.visitEachChild(node, visitor, context);
             }
         }
         function visitAwaitExpression(node) {
-            if (enclosingFunctionFlags & 2 /* Async */ && enclosingFunctionFlags & 1 /* Generator */) {
-                return ts.setOriginalNode(ts.setTextRange(ts.createYield(createAwaitHelper(context, ts.visitNode(node.expression, visitor, ts.isExpression))), 
-                /*location*/ node), node);
+            if (enclosingFunctionFlags & 2 && enclosingFunctionFlags & 1) {
+                return ts.setOriginalNode(ts.setTextRange(ts.createYield(createAwaitHelper(context, ts.visitNode(node.expression, visitor, ts.isExpression))), node), node);
             }
             return ts.visitEachChild(node, visitor, context);
         }
         function visitYieldExpression(node) {
-            if (enclosingFunctionFlags & 2 /* Async */ && enclosingFunctionFlags & 1 /* Generator */) {
+            if (enclosingFunctionFlags & 2 && enclosingFunctionFlags & 1) {
                 if (node.asteriskToken) {
                     var expression = ts.visitNode(node.expression, visitor, ts.isExpression);
                     return ts.setOriginalNode(ts.setTextRange(ts.createYield(createAwaitHelper(context, ts.updateYield(node, node.asteriskToken, createAsyncDelegatorHelper(context, createAsyncValuesHelper(context, expression, expression), expression)))), node), node);
@@ -64617,15 +53227,15 @@ var ts;
             return ts.visitEachChild(node, visitor, context);
         }
         function visitReturnStatement(node) {
-            if (enclosingFunctionFlags & 2 /* Async */ && enclosingFunctionFlags & 1 /* Generator */) {
+            if (enclosingFunctionFlags & 2 && enclosingFunctionFlags & 1) {
                 return ts.updateReturn(node, createDownlevelAwait(node.expression ? ts.visitNode(node.expression, visitor, ts.isExpression) : ts.createVoidZero()));
             }
             return ts.visitEachChild(node, visitor, context);
         }
         function visitLabeledStatement(node) {
-            if (enclosingFunctionFlags & 2 /* Async */) {
+            if (enclosingFunctionFlags & 2) {
                 var statement = ts.unwrapInnermostStatementOfLabel(node);
-                if (statement.kind === 222 /* ForOfStatement */ && statement.awaitModifier) {
+                if (statement.kind === 222 && statement.awaitModifier) {
                     return visitForOfStatement(statement, node);
                 }
                 return ts.restoreEnclosingLabel(ts.visitEachChild(statement, visitor, context), node);
@@ -64637,7 +53247,7 @@ var ts;
             var objects = [];
             for (var _i = 0, elements_4 = elements; _i < elements_4.length; _i++) {
                 var e = elements_4[_i];
-                if (e.kind === 272 /* SpreadAssignment */) {
+                if (e.kind === 272) {
                     if (chunkObject) {
                         objects.push(ts.createObjectLiteral(chunkObject));
                         chunkObject = undefined;
@@ -64646,7 +53256,7 @@ var ts;
                     objects.push(ts.visitNode(target, visitor, ts.isExpression));
                 }
                 else {
-                    chunkObject = ts.append(chunkObject, e.kind === 270 /* PropertyAssignment */
+                    chunkObject = ts.append(chunkObject, e.kind === 270
                         ? ts.createPropertyAssignment(e.name, ts.visitNode(e.initializer, visitor, ts.isExpression))
                         : ts.visitNode(e, visitor, ts.isObjectLiteralElementLike));
                 }
@@ -64657,14 +53267,9 @@ var ts;
             return objects;
         }
         function visitObjectLiteralExpression(node) {
-            if (node.transformFlags & 1048576 /* ContainsObjectSpread */) {
-                // spread elements emit like so:
-                // non-spread elements are chunked together into object literals, and then all are passed to __assign:
-                //     { a, ...o, b } => __assign({a}, o, {b});
-                // If the first element is a spread element, then the first argument to __assign is {}:
-                //     { ...o, a, b, ...o2 } => __assign({}, o, {a, b}, o2)
+            if (node.transformFlags & 1048576) {
                 var objects = chunkObjectLiteralElements(node.properties);
-                if (objects.length && objects[0].kind !== 184 /* ObjectLiteralExpression */) {
+                if (objects.length && objects[0].kind !== 184) {
                     objects.unshift(ts.createObjectLiteral());
                 }
                 return createAssignHelper(context, objects);
@@ -64679,33 +53284,22 @@ var ts;
         }
         function visitCatchClause(node) {
             if (!node.variableDeclaration) {
-                return ts.updateCatchClause(node, ts.createVariableDeclaration(ts.createTempVariable(/*recordTempVariable*/ undefined)), ts.visitNode(node.block, visitor, ts.isBlock));
+                return ts.updateCatchClause(node, ts.createVariableDeclaration(ts.createTempVariable(undefined)), ts.visitNode(node.block, visitor, ts.isBlock));
             }
             return ts.visitEachChild(node, visitor, context);
         }
-        /**
-         * Visits a BinaryExpression that contains a destructuring assignment.
-         *
-         * @param node A BinaryExpression node.
-         */
         function visitBinaryExpression(node, noDestructuringValue) {
-            if (ts.isDestructuringAssignment(node) && node.left.transformFlags & 1048576 /* ContainsObjectRest */) {
-                return ts.flattenDestructuringAssignment(node, visitor, context, 1 /* ObjectRest */, !noDestructuringValue);
+            if (ts.isDestructuringAssignment(node) && node.left.transformFlags & 1048576) {
+                return ts.flattenDestructuringAssignment(node, visitor, context, 1, !noDestructuringValue);
             }
-            else if (node.operatorToken.kind === 26 /* CommaToken */) {
+            else if (node.operatorToken.kind === 26) {
                 return ts.updateBinary(node, ts.visitNode(node.left, visitorNoDestructuringValue, ts.isExpression), ts.visitNode(node.right, noDestructuringValue ? visitorNoDestructuringValue : visitor, ts.isExpression));
             }
             return ts.visitEachChild(node, visitor, context);
         }
-        /**
-         * Visits a VariableDeclaration node with a binding pattern.
-         *
-         * @param node A VariableDeclaration node.
-         */
         function visitVariableDeclaration(node) {
-            // If we are here it is because the name contains a binding pattern with a rest somewhere in it.
-            if (ts.isBindingPattern(node.name) && node.name.transformFlags & 1048576 /* ContainsObjectRest */) {
-                return ts.flattenDestructuringBinding(node, visitor, context, 1 /* ObjectRest */);
+            if (ts.isBindingPattern(node.name) && node.name.transformFlags & 1048576) {
+                return ts.flattenDestructuringBinding(node, visitor, context, 1);
             }
             return ts.visitEachChild(node, visitor, context);
         }
@@ -64715,13 +53309,8 @@ var ts;
         function visitVoidExpression(node) {
             return ts.visitEachChild(node, visitorNoDestructuringValue, context);
         }
-        /**
-         * Visits a ForOfStatement and converts it into a ES2015-compatible ForOfStatement.
-         *
-         * @param node A ForOfStatement.
-         */
         function visitForOfStatement(node, outermostLabeledStatement) {
-            if (node.initializer.transformFlags & 1048576 /* ContainsObjectRest */) {
+            if (node.initializer.transformFlags & 1048576) {
                 node = transformForOfStatementWithObjectRest(node);
             }
             if (node.awaitModifier) {
@@ -64736,7 +53325,7 @@ var ts;
             if (ts.isVariableDeclarationList(initializerWithoutParens) || ts.isAssignmentPattern(initializerWithoutParens)) {
                 var bodyLocation = void 0;
                 var statementsLocation = void 0;
-                var temp = ts.createTempVariable(/*recordTempVariable*/ undefined);
+                var temp = ts.createTempVariable(undefined);
                 var statements = [ts.createForOfBindingStatement(initializerWithoutParens, temp)];
                 if (ts.isBlock(node.statement)) {
                     ts.addRange(statements, node.statement.statements);
@@ -64750,8 +53339,7 @@ var ts;
                 }
                 return ts.updateForOf(node, node.awaitModifier, ts.setTextRange(ts.createVariableDeclarationList([
                     ts.setTextRange(ts.createVariableDeclaration(temp), node.initializer)
-                ], 1 /* Let */), node.initializer), node.expression, ts.setTextRange(ts.createBlock(ts.setTextRange(ts.createNodeArray(statements), statementsLocation), 
-                /*multiLine*/ true), bodyLocation));
+                ], 1), node.initializer), node.expression, ts.setTextRange(ts.createBlock(ts.setTextRange(ts.createNodeArray(statements), statementsLocation), true), bodyLocation));
             }
             return node;
         }
@@ -64769,102 +53357,80 @@ var ts;
             else {
                 statements.push(statement);
             }
-            return ts.setEmitFlags(ts.setTextRange(ts.createBlock(ts.setTextRange(ts.createNodeArray(statements), statementsLocation), 
-            /*multiLine*/ true), bodyLocation), 48 /* NoSourceMap */ | 384 /* NoTokenSourceMaps */);
+            return ts.setEmitFlags(ts.setTextRange(ts.createBlock(ts.setTextRange(ts.createNodeArray(statements), statementsLocation), true), bodyLocation), 48 | 384);
         }
         function createDownlevelAwait(expression) {
-            return enclosingFunctionFlags & 1 /* Generator */
-                ? ts.createYield(/*asteriskToken*/ undefined, createAwaitHelper(context, expression))
+            return enclosingFunctionFlags & 1
+                ? ts.createYield(undefined, createAwaitHelper(context, expression))
                 : ts.createAwait(expression);
         }
         function transformForAwaitOfStatement(node, outermostLabeledStatement) {
             var expression = ts.visitNode(node.expression, visitor, ts.isExpression);
-            var iterator = ts.isIdentifier(expression) ? ts.getGeneratedNameForNode(expression) : ts.createTempVariable(/*recordTempVariable*/ undefined);
-            var result = ts.isIdentifier(expression) ? ts.getGeneratedNameForNode(iterator) : ts.createTempVariable(/*recordTempVariable*/ undefined);
+            var iterator = ts.isIdentifier(expression) ? ts.getGeneratedNameForNode(expression) : ts.createTempVariable(undefined);
+            var result = ts.isIdentifier(expression) ? ts.getGeneratedNameForNode(iterator) : ts.createTempVariable(undefined);
             var errorRecord = ts.createUniqueName("e");
             var catchVariable = ts.getGeneratedNameForNode(errorRecord);
-            var returnMethod = ts.createTempVariable(/*recordTempVariable*/ undefined);
-            var callValues = createAsyncValuesHelper(context, expression, /*location*/ node.expression);
-            var callNext = ts.createCall(ts.createPropertyAccess(iterator, "next"), /*typeArguments*/ undefined, []);
+            var returnMethod = ts.createTempVariable(undefined);
+            var callValues = createAsyncValuesHelper(context, expression, node.expression);
+            var callNext = ts.createCall(ts.createPropertyAccess(iterator, "next"), undefined, []);
             var getDone = ts.createPropertyAccess(result, "done");
             var getValue = ts.createPropertyAccess(result, "value");
             var callReturn = ts.createFunctionCall(returnMethod, iterator, []);
             hoistVariableDeclaration(errorRecord);
             hoistVariableDeclaration(returnMethod);
-            var forStatement = ts.setEmitFlags(ts.setTextRange(ts.createFor(
-            /*initializer*/ ts.setEmitFlags(ts.setTextRange(ts.createVariableDeclarationList([
-                ts.setTextRange(ts.createVariableDeclaration(iterator, /*type*/ undefined, callValues), node.expression),
+            var forStatement = ts.setEmitFlags(ts.setTextRange(ts.createFor(ts.setEmitFlags(ts.setTextRange(ts.createVariableDeclarationList([
+                ts.setTextRange(ts.createVariableDeclaration(iterator, undefined, callValues), node.expression),
                 ts.createVariableDeclaration(result)
-            ]), node.expression), 2097152 /* NoHoisting */), 
-            /*condition*/ ts.createComma(ts.createAssignment(result, createDownlevelAwait(callNext)), ts.createLogicalNot(getDone)), 
-            /*incrementor*/ undefined, 
-            /*statement*/ convertForOfStatementHead(node, getValue)), 
-            /*location*/ node), 256 /* NoTokenTrailingSourceMaps */);
+            ]), node.expression), 2097152), ts.createComma(ts.createAssignment(result, createDownlevelAwait(callNext)), ts.createLogicalNot(getDone)), undefined, convertForOfStatementHead(node, getValue)), node), 256);
             return ts.createTry(ts.createBlock([
                 ts.restoreEnclosingLabel(forStatement, outermostLabeledStatement)
             ]), ts.createCatchClause(ts.createVariableDeclaration(catchVariable), ts.setEmitFlags(ts.createBlock([
                 ts.createStatement(ts.createAssignment(errorRecord, ts.createObjectLiteral([
                     ts.createPropertyAssignment("error", catchVariable)
                 ])))
-            ]), 1 /* SingleLine */)), ts.createBlock([
-                ts.createTry(
-                /*tryBlock*/ ts.createBlock([
-                    ts.setEmitFlags(ts.createIf(ts.createLogicalAnd(ts.createLogicalAnd(result, ts.createLogicalNot(getDone)), ts.createAssignment(returnMethod, ts.createPropertyAccess(iterator, "return"))), ts.createStatement(createDownlevelAwait(callReturn))), 1 /* SingleLine */)
-                ]), 
-                /*catchClause*/ undefined, 
-                /*finallyBlock*/ ts.setEmitFlags(ts.createBlock([
-                    ts.setEmitFlags(ts.createIf(errorRecord, ts.createThrow(ts.createPropertyAccess(errorRecord, "error"))), 1 /* SingleLine */)
-                ]), 1 /* SingleLine */))
+            ]), 1)), ts.createBlock([
+                ts.createTry(ts.createBlock([
+                    ts.setEmitFlags(ts.createIf(ts.createLogicalAnd(ts.createLogicalAnd(result, ts.createLogicalNot(getDone)), ts.createAssignment(returnMethod, ts.createPropertyAccess(iterator, "return"))), ts.createStatement(createDownlevelAwait(callReturn))), 1)
+                ]), undefined, ts.setEmitFlags(ts.createBlock([
+                    ts.setEmitFlags(ts.createIf(errorRecord, ts.createThrow(ts.createPropertyAccess(errorRecord, "error"))), 1)
+                ]), 1))
             ]));
         }
         function visitParameter(node) {
-            if (node.transformFlags & 1048576 /* ContainsObjectRest */) {
-                // Binding patterns are converted into a generated name and are
-                // evaluated inside the function body.
-                return ts.updateParameter(node, 
-                /*decorators*/ undefined, 
-                /*modifiers*/ undefined, node.dotDotDotToken, ts.getGeneratedNameForNode(node), 
-                /*questionToken*/ undefined, 
-                /*type*/ undefined, ts.visitNode(node.initializer, visitor, ts.isExpression));
+            if (node.transformFlags & 1048576) {
+                return ts.updateParameter(node, undefined, undefined, node.dotDotDotToken, ts.getGeneratedNameForNode(node), undefined, undefined, ts.visitNode(node.initializer, visitor, ts.isExpression));
             }
             return ts.visitEachChild(node, visitor, context);
         }
         function visitConstructorDeclaration(node) {
             var savedEnclosingFunctionFlags = enclosingFunctionFlags;
-            enclosingFunctionFlags = 0 /* Normal */;
-            var updated = ts.updateConstructor(node, 
-            /*decorators*/ undefined, node.modifiers, ts.visitParameterList(node.parameters, visitor, context), transformFunctionBody(node));
+            enclosingFunctionFlags = 0;
+            var updated = ts.updateConstructor(node, undefined, node.modifiers, ts.visitParameterList(node.parameters, visitor, context), transformFunctionBody(node));
             enclosingFunctionFlags = savedEnclosingFunctionFlags;
             return updated;
         }
         function visitGetAccessorDeclaration(node) {
             var savedEnclosingFunctionFlags = enclosingFunctionFlags;
-            enclosingFunctionFlags = 0 /* Normal */;
-            var updated = ts.updateGetAccessor(node, 
-            /*decorators*/ undefined, node.modifiers, ts.visitNode(node.name, visitor, ts.isPropertyName), ts.visitParameterList(node.parameters, visitor, context), 
-            /*type*/ undefined, transformFunctionBody(node));
+            enclosingFunctionFlags = 0;
+            var updated = ts.updateGetAccessor(node, undefined, node.modifiers, ts.visitNode(node.name, visitor, ts.isPropertyName), ts.visitParameterList(node.parameters, visitor, context), undefined, transformFunctionBody(node));
             enclosingFunctionFlags = savedEnclosingFunctionFlags;
             return updated;
         }
         function visitSetAccessorDeclaration(node) {
             var savedEnclosingFunctionFlags = enclosingFunctionFlags;
-            enclosingFunctionFlags = 0 /* Normal */;
-            var updated = ts.updateSetAccessor(node, 
-            /*decorators*/ undefined, node.modifiers, ts.visitNode(node.name, visitor, ts.isPropertyName), ts.visitParameterList(node.parameters, visitor, context), transformFunctionBody(node));
+            enclosingFunctionFlags = 0;
+            var updated = ts.updateSetAccessor(node, undefined, node.modifiers, ts.visitNode(node.name, visitor, ts.isPropertyName), ts.visitParameterList(node.parameters, visitor, context), transformFunctionBody(node));
             enclosingFunctionFlags = savedEnclosingFunctionFlags;
             return updated;
         }
         function visitMethodDeclaration(node) {
             var savedEnclosingFunctionFlags = enclosingFunctionFlags;
             enclosingFunctionFlags = ts.getFunctionFlags(node);
-            var updated = ts.updateMethod(node, 
-            /*decorators*/ undefined, enclosingFunctionFlags & 1 /* Generator */
+            var updated = ts.updateMethod(node, undefined, enclosingFunctionFlags & 1
                 ? ts.visitNodes(node.modifiers, visitorNoAsyncModifier, ts.isModifier)
-                : node.modifiers, enclosingFunctionFlags & 2 /* Async */
+                : node.modifiers, enclosingFunctionFlags & 2
                 ? undefined
-                : node.asteriskToken, ts.visitNode(node.name, visitor, ts.isPropertyName), ts.visitNode(/*questionToken*/ undefined, visitor, ts.isToken), 
-            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
-            /*type*/ undefined, enclosingFunctionFlags & 2 /* Async */ && enclosingFunctionFlags & 1 /* Generator */
+                : node.asteriskToken, ts.visitNode(node.name, visitor, ts.isPropertyName), ts.visitNode(undefined, visitor, ts.isToken), undefined, ts.visitParameterList(node.parameters, visitor, context), undefined, enclosingFunctionFlags & 2 && enclosingFunctionFlags & 1
                 ? transformAsyncGeneratorFunctionBody(node)
                 : transformFunctionBody(node));
             enclosingFunctionFlags = savedEnclosingFunctionFlags;
@@ -64873,14 +53439,11 @@ var ts;
         function visitFunctionDeclaration(node) {
             var savedEnclosingFunctionFlags = enclosingFunctionFlags;
             enclosingFunctionFlags = ts.getFunctionFlags(node);
-            var updated = ts.updateFunctionDeclaration(node, 
-            /*decorators*/ undefined, enclosingFunctionFlags & 1 /* Generator */
+            var updated = ts.updateFunctionDeclaration(node, undefined, enclosingFunctionFlags & 1
                 ? ts.visitNodes(node.modifiers, visitorNoAsyncModifier, ts.isModifier)
-                : node.modifiers, enclosingFunctionFlags & 2 /* Async */
+                : node.modifiers, enclosingFunctionFlags & 2
                 ? undefined
-                : node.asteriskToken, node.name, 
-            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
-            /*type*/ undefined, enclosingFunctionFlags & 2 /* Async */ && enclosingFunctionFlags & 1 /* Generator */
+                : node.asteriskToken, node.name, undefined, ts.visitParameterList(node.parameters, visitor, context), undefined, enclosingFunctionFlags & 2 && enclosingFunctionFlags & 1
                 ? transformAsyncGeneratorFunctionBody(node)
                 : transformFunctionBody(node));
             enclosingFunctionFlags = savedEnclosingFunctionFlags;
@@ -64889,22 +53452,18 @@ var ts;
         function visitArrowFunction(node) {
             var savedEnclosingFunctionFlags = enclosingFunctionFlags;
             enclosingFunctionFlags = ts.getFunctionFlags(node);
-            var updated = ts.updateArrowFunction(node, node.modifiers, 
-            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
-            /*type*/ undefined, node.equalsGreaterThanToken, transformFunctionBody(node));
+            var updated = ts.updateArrowFunction(node, node.modifiers, undefined, ts.visitParameterList(node.parameters, visitor, context), undefined, node.equalsGreaterThanToken, transformFunctionBody(node));
             enclosingFunctionFlags = savedEnclosingFunctionFlags;
             return updated;
         }
         function visitFunctionExpression(node) {
             var savedEnclosingFunctionFlags = enclosingFunctionFlags;
             enclosingFunctionFlags = ts.getFunctionFlags(node);
-            var updated = ts.updateFunctionExpression(node, enclosingFunctionFlags & 1 /* Generator */
+            var updated = ts.updateFunctionExpression(node, enclosingFunctionFlags & 1
                 ? ts.visitNodes(node.modifiers, visitorNoAsyncModifier, ts.isModifier)
-                : node.modifiers, enclosingFunctionFlags & 2 /* Async */
+                : node.modifiers, enclosingFunctionFlags & 2
                 ? undefined
-                : node.asteriskToken, node.name, 
-            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
-            /*type*/ undefined, enclosingFunctionFlags & 2 /* Async */ && enclosingFunctionFlags & 1 /* Generator */
+                : node.asteriskToken, node.name, undefined, ts.visitParameterList(node.parameters, visitor, context), undefined, enclosingFunctionFlags & 2 && enclosingFunctionFlags & 1
                 ? transformAsyncGeneratorFunctionBody(node)
                 : transformFunctionBody(node));
             enclosingFunctionFlags = savedEnclosingFunctionFlags;
@@ -64913,23 +53472,17 @@ var ts;
         function transformAsyncGeneratorFunctionBody(node) {
             resumeLexicalEnvironment();
             var statements = [];
-            var statementOffset = ts.addPrologue(statements, node.body.statements, /*ensureUseStrict*/ false, visitor);
+            var statementOffset = ts.addPrologue(statements, node.body.statements, false, visitor);
             appendObjectRestAssignmentsIfNeeded(statements, node);
-            statements.push(ts.createReturn(createAsyncGeneratorHelper(context, ts.createFunctionExpression(
-            /*modifiers*/ undefined, ts.createToken(39 /* AsteriskToken */), node.name && ts.getGeneratedNameForNode(node.name), 
-            /*typeParameters*/ undefined, 
-            /*parameters*/ [], 
-            /*type*/ undefined, ts.updateBlock(node.body, ts.visitLexicalEnvironment(node.body.statements, visitor, context, statementOffset))))));
+            statements.push(ts.createReturn(createAsyncGeneratorHelper(context, ts.createFunctionExpression(undefined, ts.createToken(39), node.name && ts.getGeneratedNameForNode(node.name), undefined, [], undefined, ts.updateBlock(node.body, ts.visitLexicalEnvironment(node.body.statements, visitor, context, statementOffset))))));
             ts.prependStatements(statements, endLexicalEnvironment());
             var block = ts.updateBlock(node.body, statements);
-            // Minor optimization, emit `_super` helper to capture `super` access in an arrow.
-            // This step isn't needed if we eventually transform this to ES5.
-            if (languageVersion >= 2 /* ES2015 */) {
-                if (resolver.getNodeCheckFlags(node) & 4096 /* AsyncMethodWithSuperBinding */) {
+            if (languageVersion >= 2) {
+                if (resolver.getNodeCheckFlags(node) & 4096) {
                     enableSubstitutionForAsyncMethodsWithSuper();
                     ts.addEmitHelper(block, ts.advancedAsyncSuperHelper);
                 }
-                else if (resolver.getNodeCheckFlags(node) & 2048 /* AsyncMethodWithSuper */) {
+                else if (resolver.getNodeCheckFlags(node) & 2048) {
                     enableSubstitutionForAsyncMethodsWithSuper();
                     ts.addEmitHelper(block, ts.asyncSuperHelper);
                 }
@@ -64942,12 +53495,12 @@ var ts;
             var statements = [];
             var body = ts.visitNode(node.body, visitor, ts.isConciseBody);
             if (ts.isBlock(body)) {
-                statementOffset = ts.addPrologue(statements, body.statements, /*ensureUseStrict*/ false, visitor);
+                statementOffset = ts.addPrologue(statements, body.statements, false, visitor);
             }
-            ts.addRange(statements, appendObjectRestAssignmentsIfNeeded(/*statements*/ undefined, node));
+            ts.addRange(statements, appendObjectRestAssignmentsIfNeeded(undefined, node));
             var leadingStatements = endLexicalEnvironment();
             if (statementOffset > 0 || ts.some(statements) || ts.some(leadingStatements)) {
-                var block = ts.convertToFunctionBody(body, /*multiLine*/ true);
+                var block = ts.convertToFunctionBody(body, true);
                 ts.prependStatements(statements, leadingStatements);
                 ts.addRange(statements, block.statements.slice(statementOffset));
                 return ts.updateBlock(block, ts.setTextRange(ts.createNodeArray(statements), block.statements));
@@ -64957,15 +53510,12 @@ var ts;
         function appendObjectRestAssignmentsIfNeeded(statements, node) {
             for (var _i = 0, _a = node.parameters; _i < _a.length; _i++) {
                 var parameter = _a[_i];
-                if (parameter.transformFlags & 1048576 /* ContainsObjectRest */) {
+                if (parameter.transformFlags & 1048576) {
                     var temp = ts.getGeneratedNameForNode(parameter);
-                    var declarations = ts.flattenDestructuringBinding(parameter, visitor, context, 1 /* ObjectRest */, temp, 
-                    /*doNotRecordTempVariablesInLine*/ false, 
-                    /*skipInitializer*/ true);
+                    var declarations = ts.flattenDestructuringBinding(parameter, visitor, context, 1, temp, false, true);
                     if (ts.some(declarations)) {
-                        var statement = ts.createVariableStatement(
-                        /*modifiers*/ undefined, ts.createVariableDeclarationList(declarations));
-                        ts.setEmitFlags(statement, 1048576 /* CustomPrologue */);
+                        var statement = ts.createVariableStatement(undefined, ts.createVariableDeclarationList(declarations));
+                        ts.setEmitFlags(statement, 1048576);
                         statements = ts.append(statements, statement);
                     }
                 }
@@ -64973,33 +53523,21 @@ var ts;
             return statements;
         }
         function enableSubstitutionForAsyncMethodsWithSuper() {
-            if ((enabledSubstitutions & 1 /* AsyncMethodsWithSuper */) === 0) {
-                enabledSubstitutions |= 1 /* AsyncMethodsWithSuper */;
-                // We need to enable substitutions for call, property access, and element access
-                // if we need to rewrite super calls.
-                context.enableSubstitution(187 /* CallExpression */);
-                context.enableSubstitution(185 /* PropertyAccessExpression */);
-                context.enableSubstitution(186 /* ElementAccessExpression */);
-                // We need to be notified when entering and exiting declarations that bind super.
-                context.enableEmitNotification(235 /* ClassDeclaration */);
-                context.enableEmitNotification(154 /* MethodDeclaration */);
-                context.enableEmitNotification(156 /* GetAccessor */);
-                context.enableEmitNotification(157 /* SetAccessor */);
-                context.enableEmitNotification(155 /* Constructor */);
-            }
-        }
-        /**
-         * Called by the printer just before a node is printed.
-         *
-         * @param hint A hint as to the intended usage of the node.
-         * @param node The node to be printed.
-         * @param emitCallback The callback used to emit the node.
-         */
+            if ((enabledSubstitutions & 1) === 0) {
+                enabledSubstitutions |= 1;
+                context.enableSubstitution(187);
+                context.enableSubstitution(185);
+                context.enableSubstitution(186);
+                context.enableEmitNotification(235);
+                context.enableEmitNotification(154);
+                context.enableEmitNotification(156);
+                context.enableEmitNotification(157);
+                context.enableEmitNotification(155);
+            }
+        }
         function onEmitNode(hint, node, emitCallback) {
-            // If we need to support substitutions for `super` in an async method,
-            // we should track it here.
-            if (enabledSubstitutions & 1 /* AsyncMethodsWithSuper */ && isSuperContainer(node)) {
-                var superContainerFlags = resolver.getNodeCheckFlags(node) & (2048 /* AsyncMethodWithSuper */ | 4096 /* AsyncMethodWithSuperBinding */);
+            if (enabledSubstitutions & 1 && isSuperContainer(node)) {
+                var superContainerFlags = resolver.getNodeCheckFlags(node) & (2048 | 4096);
                 if (superContainerFlags !== enclosingSuperContainerFlags) {
                     var savedEnclosingSuperContainerFlags = enclosingSuperContainerFlags;
                     enclosingSuperContainerFlags = superContainerFlags;
@@ -65010,38 +53548,32 @@ var ts;
             }
             previousOnEmitNode(hint, node, emitCallback);
         }
-        /**
-         * Hooks node substitutions.
-         *
-         * @param hint The context for the emitter.
-         * @param node The node to substitute.
-         */
         function onSubstituteNode(hint, node) {
             node = previousOnSubstituteNode(hint, node);
-            if (hint === 1 /* Expression */ && enclosingSuperContainerFlags) {
+            if (hint === 1 && enclosingSuperContainerFlags) {
                 return substituteExpression(node);
             }
             return node;
         }
         function substituteExpression(node) {
             switch (node.kind) {
-                case 185 /* PropertyAccessExpression */:
+                case 185:
                     return substitutePropertyAccessExpression(node);
-                case 186 /* ElementAccessExpression */:
+                case 186:
                     return substituteElementAccessExpression(node);
-                case 187 /* CallExpression */:
+                case 187:
                     return substituteCallExpression(node);
             }
             return node;
         }
         function substitutePropertyAccessExpression(node) {
-            if (node.expression.kind === 97 /* SuperKeyword */) {
+            if (node.expression.kind === 97) {
                 return createSuperAccessInAsyncMethod(ts.createLiteral(ts.idText(node.name)), node);
             }
             return node;
         }
         function substituteElementAccessExpression(node) {
-            if (node.expression.kind === 97 /* SuperKeyword */) {
+            if (node.expression.kind === 97) {
                 return createSuperAccessInAsyncMethod(node.argumentExpression, node);
             }
             return node;
@@ -65052,8 +53584,7 @@ var ts;
                 var argumentExpression = ts.isPropertyAccessExpression(expression)
                     ? substitutePropertyAccessExpression(expression)
                     : substituteElementAccessExpression(expression);
-                return ts.createCall(ts.createPropertyAccess(argumentExpression, "call"), 
-                /*typeArguments*/ undefined, [
+                return ts.createCall(ts.createPropertyAccess(argumentExpression, "call"), undefined, [
                     ts.createThis()
                 ].concat(node.arguments));
             }
@@ -65061,20 +53592,18 @@ var ts;
         }
         function isSuperContainer(node) {
             var kind = node.kind;
-            return kind === 235 /* ClassDeclaration */
-                || kind === 155 /* Constructor */
-                || kind === 154 /* MethodDeclaration */
-                || kind === 156 /* GetAccessor */
-                || kind === 157 /* SetAccessor */;
+            return kind === 235
+                || kind === 155
+                || kind === 154
+                || kind === 156
+                || kind === 157;
         }
         function createSuperAccessInAsyncMethod(argumentExpression, location) {
-            if (enclosingSuperContainerFlags & 4096 /* AsyncMethodWithSuperBinding */) {
-                return ts.setTextRange(ts.createPropertyAccess(ts.createCall(ts.createIdentifier("_super"), 
-                /*typeArguments*/ undefined, [argumentExpression]), "value"), location);
+            if (enclosingSuperContainerFlags & 4096) {
+                return ts.setTextRange(ts.createPropertyAccess(ts.createCall(ts.createIdentifier("_super"), undefined, [argumentExpression]), "value"), location);
             }
             else {
-                return ts.setTextRange(ts.createCall(ts.createIdentifier("_super"), 
-                /*typeArguments*/ undefined, [argumentExpression]), location);
+                return ts.setTextRange(ts.createCall(ts.createIdentifier("_super"), undefined, [argumentExpression]), location);
             }
         }
     }
@@ -65086,13 +53615,11 @@ var ts;
         text: "\n            var __assign = (this && this.__assign) || Object.assign || function(t) {\n                for (var s, i = 1, n = arguments.length; i < n; i++) {\n                    s = arguments[i];\n                    for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))\n                        t[p] = s[p];\n                }\n                return t;\n            };"
     };
     function createAssignHelper(context, attributesSegments) {
-        if (context.getCompilerOptions().target >= 2 /* ES2015 */) {
-            return ts.createCall(ts.createPropertyAccess(ts.createIdentifier("Object"), "assign"), 
-            /*typeArguments*/ undefined, attributesSegments);
+        if (context.getCompilerOptions().target >= 2) {
+            return ts.createCall(ts.createPropertyAccess(ts.createIdentifier("Object"), "assign"), undefined, attributesSegments);
         }
         context.requestEmitHelper(assignHelper);
-        return ts.createCall(ts.getHelperName("__assign"), 
-        /*typeArguments*/ undefined, attributesSegments);
+        return ts.createCall(ts.getHelperName("__assign"), undefined, attributesSegments);
     }
     ts.createAssignHelper = createAssignHelper;
     var awaitHelper = {
@@ -65102,7 +53629,7 @@ var ts;
     };
     function createAwaitHelper(context, expression) {
         context.requestEmitHelper(awaitHelper);
-        return ts.createCall(ts.getHelperName("__await"), /*typeArguments*/ undefined, [expression]);
+        return ts.createCall(ts.getHelperName("__await"), undefined, [expression]);
     }
     var asyncGeneratorHelper = {
         name: "typescript:asyncGenerator",
@@ -65112,10 +53639,8 @@ var ts;
     function createAsyncGeneratorHelper(context, generatorFunc) {
         context.requestEmitHelper(awaitHelper);
         context.requestEmitHelper(asyncGeneratorHelper);
-        // Mark this node as originally an async function
-        (generatorFunc.emitNode || (generatorFunc.emitNode = {})).flags |= 262144 /* AsyncFunctionBody */;
-        return ts.createCall(ts.getHelperName("__asyncGenerator"), 
-        /*typeArguments*/ undefined, [
+        (generatorFunc.emitNode || (generatorFunc.emitNode = {})).flags |= 262144;
+        return ts.createCall(ts.getHelperName("__asyncGenerator"), undefined, [
             ts.createThis(),
             ts.createIdentifier("arguments"),
             generatorFunc
@@ -65129,8 +53654,7 @@ var ts;
     function createAsyncDelegatorHelper(context, expression, location) {
         context.requestEmitHelper(awaitHelper);
         context.requestEmitHelper(asyncDelegator);
-        return ts.setTextRange(ts.createCall(ts.getHelperName("__asyncDelegator"), 
-        /*typeArguments*/ undefined, [expression]), location);
+        return ts.setTextRange(ts.createCall(ts.getHelperName("__asyncDelegator"), undefined, [expression]), location);
     }
     var asyncValues = {
         name: "typescript:asyncValues",
@@ -65139,22 +53663,15 @@ var ts;
     };
     function createAsyncValuesHelper(context, expression, location) {
         context.requestEmitHelper(asyncValues);
-        return ts.setTextRange(ts.createCall(ts.getHelperName("__asyncValues"), 
-        /*typeArguments*/ undefined, [expression]), location);
+        return ts.setTextRange(ts.createCall(ts.getHelperName("__asyncValues"), undefined, [expression]), location);
     }
 })(ts || (ts = {}));
-/*@internal*/
 var ts;
 (function (ts) {
     function transformJsx(context) {
         var compilerOptions = context.getCompilerOptions();
         var currentSourceFile;
         return ts.chainBundle(transformSourceFile);
-        /**
-         * Transform JSX-specific syntax in a SourceFile.
-         *
-         * @param node A SourceFile node.
-         */
         function transformSourceFile(node) {
             if (node.isDeclarationFile) {
                 return node;
@@ -65165,7 +53682,7 @@ var ts;
             return visited;
         }
         function visitor(node) {
-            if (node.transformFlags & 4 /* ContainsJsx */) {
+            if (node.transformFlags & 4) {
                 return visitorWorker(node);
             }
             else {
@@ -65174,13 +53691,13 @@ var ts;
         }
         function visitorWorker(node) {
             switch (node.kind) {
-                case 255 /* JsxElement */:
-                    return visitJsxElement(node, /*isChild*/ false);
-                case 256 /* JsxSelfClosingElement */:
-                    return visitJsxSelfClosingElement(node, /*isChild*/ false);
-                case 259 /* JsxFragment */:
-                    return visitJsxFragment(node, /*isChild*/ false);
-                case 265 /* JsxExpression */:
+                case 255:
+                    return visitJsxElement(node, false);
+                case 256:
+                    return visitJsxSelfClosingElement(node, false);
+                case 259:
+                    return visitJsxFragment(node, false);
+                case 265:
                     return visitJsxExpression(node);
                 default:
                     return ts.visitEachChild(node, visitor, context);
@@ -65188,65 +53705,56 @@ var ts;
         }
         function transformJsxChildToExpression(node) {
             switch (node.kind) {
-                case 10 /* JsxText */:
+                case 10:
                     return visitJsxText(node);
-                case 265 /* JsxExpression */:
+                case 265:
                     return visitJsxExpression(node);
-                case 255 /* JsxElement */:
-                    return visitJsxElement(node, /*isChild*/ true);
-                case 256 /* JsxSelfClosingElement */:
-                    return visitJsxSelfClosingElement(node, /*isChild*/ true);
-                case 259 /* JsxFragment */:
-                    return visitJsxFragment(node, /*isChild*/ true);
+                case 255:
+                    return visitJsxElement(node, true);
+                case 256:
+                    return visitJsxSelfClosingElement(node, true);
+                case 259:
+                    return visitJsxFragment(node, true);
                 default:
                     return ts.Debug.failBadSyntaxKind(node);
             }
         }
         function visitJsxElement(node, isChild) {
-            return visitJsxOpeningLikeElement(node.openingElement, node.children, isChild, /*location*/ node);
+            return visitJsxOpeningLikeElement(node.openingElement, node.children, isChild, node);
         }
         function visitJsxSelfClosingElement(node, isChild) {
-            return visitJsxOpeningLikeElement(node, /*children*/ undefined, isChild, /*location*/ node);
+            return visitJsxOpeningLikeElement(node, undefined, isChild, node);
         }
         function visitJsxFragment(node, isChild) {
-            return visitJsxOpeningFragment(node.openingFragment, node.children, isChild, /*location*/ node);
+            return visitJsxOpeningFragment(node.openingFragment, node.children, isChild, node);
         }
         function visitJsxOpeningLikeElement(node, children, isChild, location) {
             var tagName = getTagName(node);
             var objectProperties;
             var attrs = node.attributes.properties;
             if (attrs.length === 0) {
-                // When there are no attributes, React wants "null"
                 objectProperties = ts.createNull();
             }
             else {
-                // Map spans of JsxAttribute nodes into object literals and spans
-                // of JsxSpreadAttribute nodes into expressions.
                 var segments = ts.flatten(ts.spanMap(attrs, ts.isJsxSpreadAttribute, function (attrs, isSpread) { return isSpread
                     ? ts.map(attrs, transformJsxSpreadAttributeToExpression)
                     : ts.createObjectLiteral(ts.map(attrs, transformJsxAttributeToObjectLiteralElement)); }));
                 if (ts.isJsxSpreadAttribute(attrs[0])) {
-                    // We must always emit at least one object literal before a spread
-                    // argument.
                     segments.unshift(ts.createObjectLiteral());
                 }
-                // Either emit one big object literal (no spread attribs), or
-                // a call to the __assign helper.
                 objectProperties = ts.singleOrUndefined(segments);
                 if (!objectProperties) {
                     objectProperties = ts.createAssignHelper(context, segments);
                 }
             }
-            var element = ts.createExpressionForJsxElement(context.getEmitResolver().getJsxFactoryEntity(currentSourceFile), compilerOptions.reactNamespace, // TODO: GH#18217
-            tagName, objectProperties, ts.mapDefined(children, transformJsxChildToExpression), node, location);
+            var element = ts.createExpressionForJsxElement(context.getEmitResolver().getJsxFactoryEntity(currentSourceFile), compilerOptions.reactNamespace, tagName, objectProperties, ts.mapDefined(children, transformJsxChildToExpression), node, location);
             if (isChild) {
                 ts.startOnNewLine(element);
             }
             return element;
         }
         function visitJsxOpeningFragment(node, children, isChild, location) {
-            var element = ts.createExpressionForJsxFragment(context.getEmitResolver().getJsxFactoryEntity(currentSourceFile), compilerOptions.reactNamespace, // TODO: GH#18217
-            ts.mapDefined(children, transformJsxChildToExpression), node, location);
+            var element = ts.createExpressionForJsxFragment(context.getEmitResolver().getJsxFactoryEntity(currentSourceFile), compilerOptions.reactNamespace, ts.mapDefined(children, transformJsxChildToExpression), node, location);
             if (isChild) {
                 ts.startOnNewLine(element);
             }
@@ -65264,14 +53772,12 @@ var ts;
             if (node === undefined) {
                 return ts.createTrue();
             }
-            else if (node.kind === 9 /* StringLiteral */) {
-                // Always recreate the literal to escape any escape sequences or newlines which may be in the original jsx string and which
-                // Need to be escaped to be handled correctly in a normal string
+            else if (node.kind === 9) {
                 var literal = ts.createLiteral(tryDecodeEntities(node.text) || node.text);
                 literal.singleQuote = node.singleQuote !== undefined ? node.singleQuote : !ts.isStringDoubleQuoted(node, currentSourceFile);
                 return ts.setTextRange(literal, node);
             }
-            else if (node.kind === 265 /* JsxExpression */) {
+            else if (node.kind === 265) {
                 if (node.expression === undefined) {
                     return ts.createTrue();
                 }
@@ -65282,43 +53788,19 @@ var ts;
             }
         }
         function visitJsxText(node) {
-            var fixed = fixupWhitespaceAndDecodeEntities(ts.getTextOfNode(node, /*includeTrivia*/ true));
+            var fixed = fixupWhitespaceAndDecodeEntities(ts.getTextOfNode(node, true));
             return fixed === undefined ? undefined : ts.createLiteral(fixed);
         }
-        /**
-         * JSX trims whitespace at the end and beginning of lines, except that the
-         * start/end of a tag is considered a start/end of a line only if that line is
-         * on the same line as the closing tag. See examples in
-         * tests/cases/conformance/jsx/tsxReactEmitWhitespace.tsx
-         * See also https://www.w3.org/TR/html4/struct/text.html#h-9.1 and https://www.w3.org/TR/CSS2/text.html#white-space-model
-         *
-         * An equivalent algorithm would be:
-         * - If there is only one line, return it.
-         * - If there is only whitespace (but multiple lines), return `undefined`.
-         * - Split the text into lines.
-         * - 'trimRight' the first line, 'trimLeft' the last line, 'trim' middle lines.
-         * - Decode entities on each line (individually).
-         * - Remove empty lines and join the rest with " ".
-         */
         function fixupWhitespaceAndDecodeEntities(text) {
             var acc;
-            // First non-whitespace character on this line.
             var firstNonWhitespace = 0;
-            // Last non-whitespace character on this line.
             var lastNonWhitespace = -1;
-            // These initial values are special because the first line is:
-            // firstNonWhitespace = 0 to indicate that we want leading whitsepace,
-            // but lastNonWhitespace = -1 as a special flag to indicate that we *don't* include the line if it's all whitespace.
             for (var i = 0; i < text.length; i++) {
                 var c = text.charCodeAt(i);
                 if (ts.isLineBreak(c)) {
-                    // If we've seen any non-whitespace characters on this line, add the 'trim' of the line.
-                    // (lastNonWhitespace === -1 is a special flag to detect whether the first line is all whitespace.)
                     if (firstNonWhitespace !== -1 && lastNonWhitespace !== -1) {
                         acc = addLineOfJsxText(acc, text.substr(firstNonWhitespace, lastNonWhitespace - firstNonWhitespace + 1));
                     }
-                    // Reset firstNonWhitespace for the next line.
-                    // Don't bother to reset lastNonWhitespace because we ignore it if firstNonWhitespace = -1.
                     firstNonWhitespace = -1;
                 }
                 else if (!ts.isWhiteSpaceSingleLine(c)) {
@@ -65329,21 +53811,13 @@ var ts;
                 }
             }
             return firstNonWhitespace !== -1
-                // Last line had a non-whitespace character. Emit the 'trimLeft', meaning keep trailing whitespace.
                 ? addLineOfJsxText(acc, text.substr(firstNonWhitespace))
-                // Last line was all whitespace, so ignore it
                 : acc;
         }
         function addLineOfJsxText(acc, trimmedLine) {
-            // We do not escape the string here as that is handled by the printer
-            // when it emits the literal. We do, however, need to decode JSX entities.
             var decoded = decodeEntities(trimmedLine);
             return acc === undefined ? decoded : acc + " " + decoded;
         }
-        /**
-         * Replace entities like "&nbsp;", "&#123;", and "&#xDEADBEEF;" with the characters they encode.
-         * See https://en.wikipedia.org/wiki/List_of_XML_and_HTML_character_entity_references
-         */
         function decodeEntities(text) {
             return text.replace(/&((#((\d+)|x([\da-fA-F]+)))|(\w+));/g, function (match, _all, _number, _digits, decimal, hex, word) {
                 if (decimal) {
@@ -65354,18 +53828,16 @@ var ts;
                 }
                 else {
                     var ch = entities.get(word);
-                    // If this is not a valid entity, then just use `match` (replace it with itself, i.e. don't replace)
                     return ch ? String.fromCharCode(ch) : match;
                 }
             });
         }
-        /** Like `decodeEntities` but returns `undefined` if there were no entities to decode. */
         function tryDecodeEntities(text) {
             var decoded = decodeEntities(text);
             return decoded === text ? undefined : decoded;
         }
         function getTagName(node) {
-            if (node.kind === 255 /* JsxElement */) {
+            if (node.kind === 255) {
                 return getTagName(node.openingElement);
             }
             else {
@@ -65378,11 +53850,6 @@ var ts;
                 }
             }
         }
-        /**
-         * Emit an attribute name, which is quoted if it needs to be quoted. Because
-         * these emit into an object literal property name, we don't need to be worried
-         * about keywords, just non-identifier characters
-         */
         function getAttributeName(node) {
             var name = node.name;
             var text = ts.idText(name);
@@ -65654,7 +54121,6 @@ var ts;
         diams: 0x2666
     });
 })(ts || (ts = {}));
-/*@internal*/
 var ts;
 (function (ts) {
     function transformES2016(context) {
@@ -65667,11 +54133,11 @@ var ts;
             return ts.visitEachChild(node, visitor, context);
         }
         function visitor(node) {
-            if ((node.transformFlags & 32 /* ContainsES2016 */) === 0) {
+            if ((node.transformFlags & 32) === 0) {
                 return node;
             }
             switch (node.kind) {
-                case 200 /* BinaryExpression */:
+                case 200:
                     return visitBinaryExpression(node);
                 default:
                     return ts.visitEachChild(node, visitor, context);
@@ -65679,9 +54145,9 @@ var ts;
         }
         function visitBinaryExpression(node) {
             switch (node.operatorToken.kind) {
-                case 62 /* AsteriskAsteriskEqualsToken */:
+                case 62:
                     return visitExponentiationAssignmentExpression(node);
-                case 40 /* AsteriskAsteriskToken */:
+                case 40:
                     return visitExponentiationExpression(node);
                 default:
                     return ts.visitEachChild(node, visitor, context);
@@ -65693,155 +54159,32 @@ var ts;
             var left = ts.visitNode(node.left, visitor, ts.isExpression);
             var right = ts.visitNode(node.right, visitor, ts.isExpression);
             if (ts.isElementAccessExpression(left)) {
-                // Transforms `a[x] **= b` into `(_a = a)[_x = x] = Math.pow(_a[_x], b)`
                 var expressionTemp = ts.createTempVariable(hoistVariableDeclaration);
                 var argumentExpressionTemp = ts.createTempVariable(hoistVariableDeclaration);
                 target = ts.setTextRange(ts.createElementAccess(ts.setTextRange(ts.createAssignment(expressionTemp, left.expression), left.expression), ts.setTextRange(ts.createAssignment(argumentExpressionTemp, left.argumentExpression), left.argumentExpression)), left);
                 value = ts.setTextRange(ts.createElementAccess(expressionTemp, argumentExpressionTemp), left);
             }
             else if (ts.isPropertyAccessExpression(left)) {
-                // Transforms `a.x **= b` into `(_a = a).x = Math.pow(_a.x, b)`
                 var expressionTemp = ts.createTempVariable(hoistVariableDeclaration);
                 target = ts.setTextRange(ts.createPropertyAccess(ts.setTextRange(ts.createAssignment(expressionTemp, left.expression), left.expression), left.name), left);
                 value = ts.setTextRange(ts.createPropertyAccess(expressionTemp, left.name), left);
             }
             else {
-                // Transforms `a **= b` into `a = Math.pow(a, b)`
                 target = left;
                 value = left;
             }
-            return ts.setTextRange(ts.createAssignment(target, ts.createMathPow(value, right, /*location*/ node)), node);
+            return ts.setTextRange(ts.createAssignment(target, ts.createMathPow(value, right, node)), node);
         }
         function visitExponentiationExpression(node) {
-            // Transforms `a ** b` into `Math.pow(a, b)`
             var left = ts.visitNode(node.left, visitor, ts.isExpression);
             var right = ts.visitNode(node.right, visitor, ts.isExpression);
-            return ts.createMathPow(left, right, /*location*/ node);
+            return ts.createMathPow(left, right, node);
         }
     }
     ts.transformES2016 = transformES2016;
 })(ts || (ts = {}));
-/*@internal*/
 var ts;
 (function (ts) {
-    var ES2015SubstitutionFlags;
-    (function (ES2015SubstitutionFlags) {
-        /** Enables substitutions for captured `this` */
-        ES2015SubstitutionFlags[ES2015SubstitutionFlags["CapturedThis"] = 1] = "CapturedThis";
-        /** Enables substitutions for block-scoped bindings. */
-        ES2015SubstitutionFlags[ES2015SubstitutionFlags["BlockScopedBindings"] = 2] = "BlockScopedBindings";
-    })(ES2015SubstitutionFlags || (ES2015SubstitutionFlags = {}));
-    var CopyDirection;
-    (function (CopyDirection) {
-        CopyDirection[CopyDirection["ToOriginal"] = 0] = "ToOriginal";
-        CopyDirection[CopyDirection["ToOutParameter"] = 1] = "ToOutParameter";
-    })(CopyDirection || (CopyDirection = {}));
-    var Jump;
-    (function (Jump) {
-        Jump[Jump["Break"] = 2] = "Break";
-        Jump[Jump["Continue"] = 4] = "Continue";
-        Jump[Jump["Return"] = 8] = "Return";
-    })(Jump || (Jump = {}));
-    var SuperCaptureResult;
-    (function (SuperCaptureResult) {
-        /**
-         * A capture may have been added for calls to 'super', but
-         * the caller should emit subsequent statements normally.
-         */
-        SuperCaptureResult[SuperCaptureResult["NoReplacement"] = 0] = "NoReplacement";
-        /**
-         * A call to 'super()' got replaced with a capturing statement like:
-         *
-         *  var _this = _super.call(...) || this;
-         *
-         * Callers should skip the current statement.
-         */
-        SuperCaptureResult[SuperCaptureResult["ReplaceSuperCapture"] = 1] = "ReplaceSuperCapture";
-        /**
-         * A call to 'super()' got replaced with a capturing statement like:
-         *
-         *  return _super.call(...) || this;
-         *
-         * Callers should skip the current statement and avoid any returns of '_this'.
-         */
-        SuperCaptureResult[SuperCaptureResult["ReplaceWithReturn"] = 2] = "ReplaceWithReturn";
-    })(SuperCaptureResult || (SuperCaptureResult = {}));
-    // Facts we track as we traverse the tree
-    var HierarchyFacts;
-    (function (HierarchyFacts) {
-        HierarchyFacts[HierarchyFacts["None"] = 0] = "None";
-        //
-        // Ancestor facts
-        //
-        HierarchyFacts[HierarchyFacts["Function"] = 1] = "Function";
-        HierarchyFacts[HierarchyFacts["ArrowFunction"] = 2] = "ArrowFunction";
-        HierarchyFacts[HierarchyFacts["AsyncFunctionBody"] = 4] = "AsyncFunctionBody";
-        HierarchyFacts[HierarchyFacts["NonStaticClassElement"] = 8] = "NonStaticClassElement";
-        HierarchyFacts[HierarchyFacts["CapturesThis"] = 16] = "CapturesThis";
-        HierarchyFacts[HierarchyFacts["ExportedVariableStatement"] = 32] = "ExportedVariableStatement";
-        HierarchyFacts[HierarchyFacts["TopLevel"] = 64] = "TopLevel";
-        HierarchyFacts[HierarchyFacts["Block"] = 128] = "Block";
-        HierarchyFacts[HierarchyFacts["IterationStatement"] = 256] = "IterationStatement";
-        HierarchyFacts[HierarchyFacts["IterationStatementBlock"] = 512] = "IterationStatementBlock";
-        HierarchyFacts[HierarchyFacts["ForStatement"] = 1024] = "ForStatement";
-        HierarchyFacts[HierarchyFacts["ForInOrForOfStatement"] = 2048] = "ForInOrForOfStatement";
-        HierarchyFacts[HierarchyFacts["ConstructorWithCapturedSuper"] = 4096] = "ConstructorWithCapturedSuper";
-        HierarchyFacts[HierarchyFacts["ComputedPropertyName"] = 8192] = "ComputedPropertyName";
-        // NOTE: do not add more ancestor flags without also updating AncestorFactsMask below.
-        //
-        // Ancestor masks
-        //
-        HierarchyFacts[HierarchyFacts["AncestorFactsMask"] = 16383] = "AncestorFactsMask";
-        // We are always in *some* kind of block scope, but only specific block-scope containers are
-        // top-level or Blocks.
-        HierarchyFacts[HierarchyFacts["BlockScopeIncludes"] = 0] = "BlockScopeIncludes";
-        HierarchyFacts[HierarchyFacts["BlockScopeExcludes"] = 4032] = "BlockScopeExcludes";
-        // A source file is a top-level block scope.
-        HierarchyFacts[HierarchyFacts["SourceFileIncludes"] = 64] = "SourceFileIncludes";
-        HierarchyFacts[HierarchyFacts["SourceFileExcludes"] = 3968] = "SourceFileExcludes";
-        // Functions, methods, and accessors are both new lexical scopes and new block scopes.
-        HierarchyFacts[HierarchyFacts["FunctionIncludes"] = 65] = "FunctionIncludes";
-        HierarchyFacts[HierarchyFacts["FunctionExcludes"] = 16286] = "FunctionExcludes";
-        HierarchyFacts[HierarchyFacts["AsyncFunctionBodyIncludes"] = 69] = "AsyncFunctionBodyIncludes";
-        HierarchyFacts[HierarchyFacts["AsyncFunctionBodyExcludes"] = 16278] = "AsyncFunctionBodyExcludes";
-        // Arrow functions are lexically scoped to their container, but are new block scopes.
-        HierarchyFacts[HierarchyFacts["ArrowFunctionIncludes"] = 66] = "ArrowFunctionIncludes";
-        HierarchyFacts[HierarchyFacts["ArrowFunctionExcludes"] = 16256] = "ArrowFunctionExcludes";
-        // Constructors are both new lexical scopes and new block scopes. Constructors are also
-        // always considered non-static members of a class.
-        HierarchyFacts[HierarchyFacts["ConstructorIncludes"] = 73] = "ConstructorIncludes";
-        HierarchyFacts[HierarchyFacts["ConstructorExcludes"] = 16278] = "ConstructorExcludes";
-        // 'do' and 'while' statements are not block scopes. We track that the subtree is contained
-        // within an IterationStatement to indicate whether the embedded statement is an
-        // IterationStatementBlock.
-        HierarchyFacts[HierarchyFacts["DoOrWhileStatementIncludes"] = 256] = "DoOrWhileStatementIncludes";
-        HierarchyFacts[HierarchyFacts["DoOrWhileStatementExcludes"] = 0] = "DoOrWhileStatementExcludes";
-        // 'for' statements are new block scopes and have special handling for 'let' declarations.
-        HierarchyFacts[HierarchyFacts["ForStatementIncludes"] = 1280] = "ForStatementIncludes";
-        HierarchyFacts[HierarchyFacts["ForStatementExcludes"] = 3008] = "ForStatementExcludes";
-        // 'for-in' and 'for-of' statements are new block scopes and have special handling for
-        // 'let' declarations.
-        HierarchyFacts[HierarchyFacts["ForInOrForOfStatementIncludes"] = 2304] = "ForInOrForOfStatementIncludes";
-        HierarchyFacts[HierarchyFacts["ForInOrForOfStatementExcludes"] = 1984] = "ForInOrForOfStatementExcludes";
-        // Blocks (other than function bodies) are new block scopes.
-        HierarchyFacts[HierarchyFacts["BlockIncludes"] = 128] = "BlockIncludes";
-        HierarchyFacts[HierarchyFacts["BlockExcludes"] = 3904] = "BlockExcludes";
-        HierarchyFacts[HierarchyFacts["IterationStatementBlockIncludes"] = 512] = "IterationStatementBlockIncludes";
-        HierarchyFacts[HierarchyFacts["IterationStatementBlockExcludes"] = 4032] = "IterationStatementBlockExcludes";
-        // Computed property names track subtree flags differently than their containing members.
-        HierarchyFacts[HierarchyFacts["ComputedPropertyNameIncludes"] = 8192] = "ComputedPropertyNameIncludes";
-        HierarchyFacts[HierarchyFacts["ComputedPropertyNameExcludes"] = 0] = "ComputedPropertyNameExcludes";
-        //
-        // Subtree facts
-        //
-        HierarchyFacts[HierarchyFacts["NewTarget"] = 16384] = "NewTarget";
-        HierarchyFacts[HierarchyFacts["NewTargetInComputedPropertyName"] = 32768] = "NewTargetInComputedPropertyName";
-        //
-        // Subtree masks
-        //
-        HierarchyFacts[HierarchyFacts["SubtreeFactsMask"] = -16384] = "SubtreeFactsMask";
-        HierarchyFacts[HierarchyFacts["PropagateNewTargetMask"] = 49152] = "PropagateNewTargetMask";
-    })(HierarchyFacts || (HierarchyFacts = {}));
     function transformES2015(context) {
         var startLexicalEnvironment = context.startLexicalEnvironment, resumeLexicalEnvironment = context.resumeLexicalEnvironment, endLexicalEnvironment = context.endLexicalEnvironment, hoistVariableDeclaration = context.hoistVariableDeclaration;
         var compilerOptions = context.getCompilerOptions();
@@ -65857,15 +54200,7 @@ var ts;
         function recordTaggedTemplateString(temp) {
             taggedTemplateStringDeclarations = ts.append(taggedTemplateStringDeclarations, ts.createVariableDeclaration(temp));
         }
-        /**
-         * Used to track if we are emitting body of the converted loop
-         */
         var convertedLoopState;
-        /**
-         * Keeps track of whether substitutions have been enabled for specific cases.
-         * They are persisted between each SourceFile transformation and should not
-         * be reset.
-         */
         var enabledSubstitutions;
         return ts.chainBundle(transformSourceFile);
         function transformSourceFile(node) {
@@ -65879,40 +54214,28 @@ var ts;
             currentSourceFile = undefined;
             currentText = undefined;
             taggedTemplateStringDeclarations = undefined;
-            hierarchyFacts = 0 /* None */;
+            hierarchyFacts = 0;
             return visited;
         }
-        /**
-         * Sets the `HierarchyFacts` for this node prior to visiting this node's subtree, returning the facts set prior to modification.
-         * @param excludeFacts The existing `HierarchyFacts` to reset before visiting the subtree.
-         * @param includeFacts The new `HierarchyFacts` to set before visiting the subtree.
-         */
         function enterSubtree(excludeFacts, includeFacts) {
             var ancestorFacts = hierarchyFacts;
-            hierarchyFacts = (hierarchyFacts & ~excludeFacts | includeFacts) & 16383 /* AncestorFactsMask */;
+            hierarchyFacts = (hierarchyFacts & ~excludeFacts | includeFacts) & 16383;
             return ancestorFacts;
         }
-        /**
-         * Restores the `HierarchyFacts` for this node's ancestor after visiting this node's
-         * subtree, propagating specific facts from the subtree.
-         * @param ancestorFacts The `HierarchyFacts` of the ancestor to restore after visiting the subtree.
-         * @param excludeFacts The existing `HierarchyFacts` of the subtree that should not be propagated.
-         * @param includeFacts The new `HierarchyFacts` of the subtree that should be propagated.
-         */
         function exitSubtree(ancestorFacts, excludeFacts, includeFacts) {
-            hierarchyFacts = (hierarchyFacts & ~excludeFacts | includeFacts) & -16384 /* SubtreeFactsMask */ | ancestorFacts;
+            hierarchyFacts = (hierarchyFacts & ~excludeFacts | includeFacts) & -16384 | ancestorFacts;
         }
         function isReturnVoidStatementInConstructorWithCapturedSuper(node) {
-            return (hierarchyFacts & 4096 /* ConstructorWithCapturedSuper */) !== 0
-                && node.kind === 225 /* ReturnStatement */
+            return (hierarchyFacts & 4096) !== 0
+                && node.kind === 225
                 && !node.expression;
         }
         function shouldVisitNode(node) {
-            return (node.transformFlags & 128 /* ContainsES2015 */) !== 0
+            return (node.transformFlags & 128) !== 0
                 || convertedLoopState !== undefined
-                || (hierarchyFacts & 4096 /* ConstructorWithCapturedSuper */ && (ts.isStatement(node) || (node.kind === 213 /* Block */)))
-                || (ts.isIterationStatement(node, /*lookInLabeledStatements*/ false) && shouldConvertIterationStatementBody(node))
-                || (ts.getEmitFlags(node) & 33554432 /* TypeScriptClassWrapper */) !== 0;
+                || (hierarchyFacts & 4096 && (ts.isStatement(node) || (node.kind === 213)))
+                || (ts.isIterationStatement(node, false) && shouldConvertIterationStatementBody(node))
+                || (ts.getEmitFlags(node) & 33554432) !== 0;
         }
         function visitor(node) {
             if (shouldVisitNode(node)) {
@@ -65924,134 +54247,133 @@ var ts;
         }
         function functionBodyVisitor(node) {
             if (shouldVisitNode(node)) {
-                return visitBlock(node, /*isFunctionBody*/ true);
+                return visitBlock(node, true);
             }
             return node;
         }
         function callExpressionVisitor(node) {
-            if (node.kind === 97 /* SuperKeyword */) {
-                return visitSuperKeyword(/*isExpressionOfCall*/ true);
+            if (node.kind === 97) {
+                return visitSuperKeyword(true);
             }
             return visitor(node);
         }
         function visitJavaScript(node) {
             switch (node.kind) {
-                case 115 /* StaticKeyword */:
-                    return undefined; // elide static keyword
-                case 235 /* ClassDeclaration */:
+                case 115:
+                    return undefined;
+                case 235:
                     return visitClassDeclaration(node);
-                case 205 /* ClassExpression */:
+                case 205:
                     return visitClassExpression(node);
-                case 149 /* Parameter */:
+                case 149:
                     return visitParameter(node);
-                case 234 /* FunctionDeclaration */:
+                case 234:
                     return visitFunctionDeclaration(node);
-                case 193 /* ArrowFunction */:
+                case 193:
                     return visitArrowFunction(node);
-                case 192 /* FunctionExpression */:
+                case 192:
                     return visitFunctionExpression(node);
-                case 232 /* VariableDeclaration */:
+                case 232:
                     return visitVariableDeclaration(node);
-                case 71 /* Identifier */:
+                case 71:
                     return visitIdentifier(node);
-                case 233 /* VariableDeclarationList */:
+                case 233:
                     return visitVariableDeclarationList(node);
-                case 227 /* SwitchStatement */:
+                case 227:
                     return visitSwitchStatement(node);
-                case 241 /* CaseBlock */:
+                case 241:
                     return visitCaseBlock(node);
-                case 213 /* Block */:
-                    return visitBlock(node, /*isFunctionBody*/ false);
-                case 224 /* BreakStatement */:
-                case 223 /* ContinueStatement */:
+                case 213:
+                    return visitBlock(node, false);
+                case 224:
+                case 223:
                     return visitBreakOrContinueStatement(node);
-                case 228 /* LabeledStatement */:
+                case 228:
                     return visitLabeledStatement(node);
-                case 218 /* DoStatement */:
-                case 219 /* WhileStatement */:
-                    return visitDoOrWhileStatement(node, /*outermostLabeledStatement*/ undefined);
-                case 220 /* ForStatement */:
-                    return visitForStatement(node, /*outermostLabeledStatement*/ undefined);
-                case 221 /* ForInStatement */:
-                    return visitForInStatement(node, /*outermostLabeledStatement*/ undefined);
-                case 222 /* ForOfStatement */:
-                    return visitForOfStatement(node, /*outermostLabeledStatement*/ undefined);
-                case 216 /* ExpressionStatement */:
+                case 218:
+                case 219:
+                    return visitDoOrWhileStatement(node, undefined);
+                case 220:
+                    return visitForStatement(node, undefined);
+                case 221:
+                    return visitForInStatement(node, undefined);
+                case 222:
+                    return visitForOfStatement(node, undefined);
+                case 216:
                     return visitExpressionStatement(node);
-                case 184 /* ObjectLiteralExpression */:
+                case 184:
                     return visitObjectLiteralExpression(node);
-                case 269 /* CatchClause */:
+                case 269:
                     return visitCatchClause(node);
-                case 271 /* ShorthandPropertyAssignment */:
+                case 271:
                     return visitShorthandPropertyAssignment(node);
-                case 147 /* ComputedPropertyName */:
+                case 147:
                     return visitComputedPropertyName(node);
-                case 183 /* ArrayLiteralExpression */:
+                case 183:
                     return visitArrayLiteralExpression(node);
-                case 187 /* CallExpression */:
+                case 187:
                     return visitCallExpression(node);
-                case 188 /* NewExpression */:
+                case 188:
                     return visitNewExpression(node);
-                case 191 /* ParenthesizedExpression */:
-                    return visitParenthesizedExpression(node, /*needsDestructuringValue*/ true);
-                case 200 /* BinaryExpression */:
-                    return visitBinaryExpression(node, /*needsDestructuringValue*/ true);
-                case 13 /* NoSubstitutionTemplateLiteral */:
-                case 14 /* TemplateHead */:
-                case 15 /* TemplateMiddle */:
-                case 16 /* TemplateTail */:
+                case 191:
+                    return visitParenthesizedExpression(node, true);
+                case 200:
+                    return visitBinaryExpression(node, true);
+                case 13:
+                case 14:
+                case 15:
+                case 16:
                     return visitTemplateLiteral(node);
-                case 9 /* StringLiteral */:
+                case 9:
                     return visitStringLiteral(node);
-                case 8 /* NumericLiteral */:
+                case 8:
                     return visitNumericLiteral(node);
-                case 189 /* TaggedTemplateExpression */:
+                case 189:
                     return visitTaggedTemplateExpression(node);
-                case 202 /* TemplateExpression */:
+                case 202:
                     return visitTemplateExpression(node);
-                case 203 /* YieldExpression */:
+                case 203:
                     return visitYieldExpression(node);
-                case 204 /* SpreadElement */:
+                case 204:
                     return visitSpreadElement(node);
-                case 97 /* SuperKeyword */:
-                    return visitSuperKeyword(/*isExpressionOfCall*/ false);
-                case 99 /* ThisKeyword */:
+                case 97:
+                    return visitSuperKeyword(false);
+                case 99:
                     return visitThisKeyword(node);
-                case 210 /* MetaProperty */:
+                case 210:
                     return visitMetaProperty(node);
-                case 154 /* MethodDeclaration */:
+                case 154:
                     return visitMethodDeclaration(node);
-                case 156 /* GetAccessor */:
-                case 157 /* SetAccessor */:
+                case 156:
+                case 157:
                     return visitAccessorDeclaration(node);
-                case 214 /* VariableStatement */:
+                case 214:
                     return visitVariableStatement(node);
-                case 225 /* ReturnStatement */:
+                case 225:
                     return visitReturnStatement(node);
                 default:
                     return ts.visitEachChild(node, visitor, context);
             }
         }
         function visitSourceFile(node) {
-            var ancestorFacts = enterSubtree(3968 /* SourceFileExcludes */, 64 /* SourceFileIncludes */);
+            var ancestorFacts = enterSubtree(3968, 64);
             var statements = [];
             startLexicalEnvironment();
-            var statementOffset = ts.addStandardPrologue(statements, node.statements, /*ensureUseStrict*/ false);
+            var statementOffset = ts.addStandardPrologue(statements, node.statements, false);
             addCaptureThisForNodeIfNeeded(statements, node);
             statementOffset = ts.addCustomPrologue(statements, node.statements, statementOffset, visitor);
             ts.addRange(statements, ts.visitNodes(node.statements, visitor, ts.isStatement, statementOffset));
             if (taggedTemplateStringDeclarations) {
-                statements.push(ts.createVariableStatement(/*modifiers*/ undefined, ts.createVariableDeclarationList(taggedTemplateStringDeclarations)));
+                statements.push(ts.createVariableStatement(undefined, ts.createVariableDeclarationList(taggedTemplateStringDeclarations)));
             }
             ts.prependStatements(statements, endLexicalEnvironment());
-            exitSubtree(ancestorFacts, 0 /* None */, 0 /* None */);
+            exitSubtree(ancestorFacts, 0, 0);
             return ts.updateSourceFileNode(node, ts.setTextRange(ts.createNodeArray(statements), node.statements));
         }
         function visitSwitchStatement(node) {
             if (convertedLoopState !== undefined) {
                 var savedAllowedNonLabeledJumps = convertedLoopState.allowedNonLabeledJumps;
-                // for switch statement allow only non-labeled break
-                convertedLoopState.allowedNonLabeledJumps |= 2 /* Break */;
+                convertedLoopState.allowedNonLabeledJumps |= 2;
                 var result = ts.visitEachChild(node, visitor, context);
                 convertedLoopState.allowedNonLabeledJumps = savedAllowedNonLabeledJumps;
                 return result;
@@ -66059,9 +54381,9 @@ var ts;
             return ts.visitEachChild(node, visitor, context);
         }
         function visitCaseBlock(node) {
-            var ancestorFacts = enterSubtree(4032 /* BlockScopeExcludes */, 0 /* BlockScopeIncludes */);
+            var ancestorFacts = enterSubtree(4032, 0);
             var updated = ts.visitEachChild(node, visitor, context);
-            exitSubtree(ancestorFacts, 0 /* None */, 0 /* None */);
+            exitSubtree(ancestorFacts, 0, 0);
             return updated;
         }
         function returnCapturedThis(node) {
@@ -66069,7 +54391,7 @@ var ts;
         }
         function visitReturnStatement(node) {
             if (convertedLoopState) {
-                convertedLoopState.nonLocalJumps |= 8 /* Return */;
+                convertedLoopState.nonLocalJumps |= 8;
                 if (isReturnVoidStatementInConstructorWithCapturedSuper(node)) {
                     node = returnCapturedThis(node);
                 }
@@ -66086,8 +54408,7 @@ var ts;
         }
         function visitThisKeyword(node) {
             if (convertedLoopState) {
-                if (hierarchyFacts & 2 /* ArrowFunction */) {
-                    // if the enclosing function is an ArrowFunction then we use the captured 'this' keyword.
+                if (hierarchyFacts & 2) {
                     convertedLoopState.containsLexicalThis = true;
                     return node;
                 }
@@ -66109,35 +54430,30 @@ var ts;
         }
         function visitBreakOrContinueStatement(node) {
             if (convertedLoopState) {
-                // check if we can emit break/continue as is
-                // it is possible if either
-                //   - break/continue is labeled and label is located inside the converted loop
-                //   - break/continue is non-labeled and located in non-converted loop/switch statement
-                var jump = node.kind === 224 /* BreakStatement */ ? 2 /* Break */ : 4 /* Continue */;
+                var jump = node.kind === 224 ? 2 : 4;
                 var canUseBreakOrContinue = (node.label && convertedLoopState.labels && convertedLoopState.labels.get(ts.idText(node.label))) ||
                     (!node.label && (convertedLoopState.allowedNonLabeledJumps & jump));
                 if (!canUseBreakOrContinue) {
                     var labelMarker = void 0;
                     var label = node.label;
                     if (!label) {
-                        if (node.kind === 224 /* BreakStatement */) {
-                            convertedLoopState.nonLocalJumps |= 2 /* Break */;
+                        if (node.kind === 224) {
+                            convertedLoopState.nonLocalJumps |= 2;
                             labelMarker = "break";
                         }
                         else {
-                            convertedLoopState.nonLocalJumps |= 4 /* Continue */;
-                            // note: return value is emitted only to simplify debugging, call to converted loop body does not do any dispatching on it.
+                            convertedLoopState.nonLocalJumps |= 4;
                             labelMarker = "continue";
                         }
                     }
                     else {
-                        if (node.kind === 224 /* BreakStatement */) {
+                        if (node.kind === 224) {
                             labelMarker = "break-" + label.escapedText;
-                            setLabeledJump(convertedLoopState, /*isBreak*/ true, ts.idText(label), labelMarker);
+                            setLabeledJump(convertedLoopState, true, ts.idText(label), labelMarker);
                         }
                         else {
                             labelMarker = "continue-" + label.escapedText;
-                            setLabeledJump(convertedLoopState, /*isBreak*/ false, ts.idText(label), labelMarker);
+                            setLabeledJump(convertedLoopState, false, ts.idText(label), labelMarker);
                         }
                     }
                     var returnExpression = ts.createLiteral(labelMarker);
@@ -66145,305 +54461,167 @@ var ts;
                         var outParams = convertedLoopState.loopOutParameters;
                         var expr = void 0;
                         for (var i = 0; i < outParams.length; i++) {
-                            var copyExpr = copyOutParameter(outParams[i], 1 /* ToOutParameter */);
+                            var copyExpr = copyOutParameter(outParams[i], 1);
                             if (i === 0) {
                                 expr = copyExpr;
                             }
                             else {
-                                expr = ts.createBinary(expr, 26 /* CommaToken */, copyExpr);
+                                expr = ts.createBinary(expr, 26, copyExpr);
                             }
                         }
-                        returnExpression = ts.createBinary(expr, 26 /* CommaToken */, returnExpression);
+                        returnExpression = ts.createBinary(expr, 26, returnExpression);
                     }
                     return ts.createReturn(returnExpression);
                 }
             }
             return ts.visitEachChild(node, visitor, context);
         }
-        /**
-         * Visits a ClassDeclaration and transforms it into a variable statement.
-         *
-         * @param node A ClassDeclaration node.
-         */
         function visitClassDeclaration(node) {
-            // [source]
-            //      class C { }
-            //
-            // [output]
-            //      var C = (function () {
-            //          function C() {
-            //          }
-            //          return C;
-            //      }());
-            var variable = ts.createVariableDeclaration(ts.getLocalName(node, /*allowComments*/ true), 
-            /*type*/ undefined, transformClassLikeDeclarationToExpression(node));
+            var variable = ts.createVariableDeclaration(ts.getLocalName(node, true), undefined, transformClassLikeDeclarationToExpression(node));
             ts.setOriginalNode(variable, node);
             var statements = [];
-            var statement = ts.createVariableStatement(/*modifiers*/ undefined, ts.createVariableDeclarationList([variable]));
+            var statement = ts.createVariableStatement(undefined, ts.createVariableDeclarationList([variable]));
             ts.setOriginalNode(statement, node);
             ts.setTextRange(statement, node);
             ts.startOnNewLine(statement);
             statements.push(statement);
-            // Add an `export default` statement for default exports (for `--target es5 --module es6`)
-            if (ts.hasModifier(node, 1 /* Export */)) {
-                var exportStatement = ts.hasModifier(node, 512 /* Default */)
+            if (ts.hasModifier(node, 1)) {
+                var exportStatement = ts.hasModifier(node, 512)
                     ? ts.createExportDefault(ts.getLocalName(node))
                     : ts.createExternalModuleExport(ts.getLocalName(node));
                 ts.setOriginalNode(exportStatement, statement);
                 statements.push(exportStatement);
             }
             var emitFlags = ts.getEmitFlags(node);
-            if ((emitFlags & 4194304 /* HasEndOfDeclarationMarker */) === 0) {
-                // Add a DeclarationMarker as a marker for the end of the declaration
+            if ((emitFlags & 4194304) === 0) {
                 statements.push(ts.createEndOfDeclarationMarker(node));
-                ts.setEmitFlags(statement, emitFlags | 4194304 /* HasEndOfDeclarationMarker */);
+                ts.setEmitFlags(statement, emitFlags | 4194304);
             }
             return ts.singleOrMany(statements);
         }
-        /**
-         * Visits a ClassExpression and transforms it into an expression.
-         *
-         * @param node A ClassExpression node.
-         */
         function visitClassExpression(node) {
-            // [source]
-            //      C = class { }
-            //
-            // [output]
-            //      C = (function () {
-            //          function class_1() {
-            //          }
-            //          return class_1;
-            //      }())
             return transformClassLikeDeclarationToExpression(node);
         }
-        /**
-         * Transforms a ClassExpression or ClassDeclaration into an expression.
-         *
-         * @param node A ClassExpression or ClassDeclaration node.
-         */
         function transformClassLikeDeclarationToExpression(node) {
-            // [source]
-            //      class C extends D {
-            //          constructor() {}
-            //          method() {}
-            //          get prop() {}
-            //          set prop(v) {}
-            //      }
-            //
-            // [output]
-            //      (function (_super) {
-            //          __extends(C, _super);
-            //          function C() {
-            //          }
-            //          C.prototype.method = function () {}
-            //          Object.defineProperty(C.prototype, "prop", {
-            //              get: function() {},
-            //              set: function() {},
-            //              enumerable: true,
-            //              configurable: true
-            //          });
-            //          return C;
-            //      }(D))
             if (node.name) {
                 enableSubstitutionsForBlockScopedBindings();
             }
             var extendsClauseElement = ts.getClassExtendsHeritageClauseElement(node);
-            var classFunction = ts.createFunctionExpression(
-            /*modifiers*/ undefined, 
-            /*asteriskToken*/ undefined, 
-            /*name*/ undefined, 
-            /*typeParameters*/ undefined, extendsClauseElement ? [ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, ts.createFileLevelUniqueName("_super"))] : [], 
-            /*type*/ undefined, transformClassBody(node, extendsClauseElement));
-            // To preserve the behavior of the old emitter, we explicitly indent
-            // the body of the function here if it was requested in an earlier
-            // transformation.
-            ts.setEmitFlags(classFunction, (ts.getEmitFlags(node) & 65536 /* Indented */) | 524288 /* ReuseTempVariableScope */);
-            // "inner" and "outer" below are added purely to preserve source map locations from
-            // the old emitter
+            var classFunction = ts.createFunctionExpression(undefined, undefined, undefined, undefined, extendsClauseElement ? [ts.createParameter(undefined, undefined, undefined, ts.createFileLevelUniqueName("_super"))] : [], undefined, transformClassBody(node, extendsClauseElement));
+            ts.setEmitFlags(classFunction, (ts.getEmitFlags(node) & 65536) | 524288);
             var inner = ts.createPartiallyEmittedExpression(classFunction);
             inner.end = node.end;
-            ts.setEmitFlags(inner, 1536 /* NoComments */);
+            ts.setEmitFlags(inner, 1536);
             var outer = ts.createPartiallyEmittedExpression(inner);
             outer.end = ts.skipTrivia(currentText, node.pos);
-            ts.setEmitFlags(outer, 1536 /* NoComments */);
-            var result = ts.createParen(ts.createCall(outer, 
-            /*typeArguments*/ undefined, extendsClauseElement
+            ts.setEmitFlags(outer, 1536);
+            var result = ts.createParen(ts.createCall(outer, undefined, extendsClauseElement
                 ? [ts.visitNode(extendsClauseElement.expression, visitor, ts.isExpression)]
                 : []));
-            ts.addSyntheticLeadingComment(result, 3 /* MultiLineCommentTrivia */, "* @class ");
+            ts.addSyntheticLeadingComment(result, 3, "* @class ");
             return result;
         }
-        /**
-         * Transforms a ClassExpression or ClassDeclaration into a function body.
-         *
-         * @param node A ClassExpression or ClassDeclaration node.
-         * @param extendsClauseElement The expression for the class `extends` clause.
-         */
         function transformClassBody(node, extendsClauseElement) {
             var statements = [];
             startLexicalEnvironment();
             addExtendsHelperIfNeeded(statements, node, extendsClauseElement);
             addConstructor(statements, node, extendsClauseElement);
             addClassMembers(statements, node);
-            // Create a synthetic text range for the return statement.
-            var closingBraceLocation = ts.createTokenRange(ts.skipTrivia(currentText, node.members.end), 18 /* CloseBraceToken */);
+            var closingBraceLocation = ts.createTokenRange(ts.skipTrivia(currentText, node.members.end), 18);
             var localName = ts.getInternalName(node);
-            // The following partially-emitted expression exists purely to align our sourcemap
-            // emit with the original emitter.
             var outer = ts.createPartiallyEmittedExpression(localName);
             outer.end = closingBraceLocation.end;
-            ts.setEmitFlags(outer, 1536 /* NoComments */);
+            ts.setEmitFlags(outer, 1536);
             var statement = ts.createReturn(outer);
             statement.pos = closingBraceLocation.pos;
-            ts.setEmitFlags(statement, 1536 /* NoComments */ | 384 /* NoTokenSourceMaps */);
+            ts.setEmitFlags(statement, 1536 | 384);
             statements.push(statement);
             ts.prependStatements(statements, endLexicalEnvironment());
-            var block = ts.createBlock(ts.setTextRange(ts.createNodeArray(statements), /*location*/ node.members), /*multiLine*/ true);
-            ts.setEmitFlags(block, 1536 /* NoComments */);
+            var block = ts.createBlock(ts.setTextRange(ts.createNodeArray(statements), node.members), true);
+            ts.setEmitFlags(block, 1536);
             return block;
         }
-        /**
-         * Adds a call to the `__extends` helper if needed for a class.
-         *
-         * @param statements The statements of the class body function.
-         * @param node The ClassExpression or ClassDeclaration node.
-         * @param extendsClauseElement The expression for the class `extends` clause.
-         */
         function addExtendsHelperIfNeeded(statements, node, extendsClauseElement) {
             if (extendsClauseElement) {
-                statements.push(ts.setTextRange(ts.createStatement(createExtendsHelper(context, ts.getInternalName(node))), 
-                /*location*/ extendsClauseElement));
+                statements.push(ts.setTextRange(ts.createStatement(createExtendsHelper(context, ts.getInternalName(node))), extendsClauseElement));
             }
         }
-        /**
-         * Adds the constructor of the class to a class body function.
-         *
-         * @param statements The statements of the class body function.
-         * @param node The ClassExpression or ClassDeclaration node.
-         * @param extendsClauseElement The expression for the class `extends` clause.
-         */
         function addConstructor(statements, node, extendsClauseElement) {
             var savedConvertedLoopState = convertedLoopState;
             convertedLoopState = undefined;
-            var ancestorFacts = enterSubtree(16278 /* ConstructorExcludes */, 73 /* ConstructorIncludes */);
+            var ancestorFacts = enterSubtree(16278, 73);
             var constructor = ts.getFirstConstructorWithBody(node);
             var hasSynthesizedSuper = hasSynthesizedDefaultSuperCall(constructor, extendsClauseElement !== undefined);
-            var constructorFunction = ts.createFunctionDeclaration(
-            /*decorators*/ undefined, 
-            /*modifiers*/ undefined, 
-            /*asteriskToken*/ undefined, ts.getInternalName(node), 
-            /*typeParameters*/ undefined, transformConstructorParameters(constructor, hasSynthesizedSuper), 
-            /*type*/ undefined, transformConstructorBody(constructor, node, extendsClauseElement, hasSynthesizedSuper));
+            var constructorFunction = ts.createFunctionDeclaration(undefined, undefined, undefined, ts.getInternalName(node), undefined, transformConstructorParameters(constructor, hasSynthesizedSuper), undefined, transformConstructorBody(constructor, node, extendsClauseElement, hasSynthesizedSuper));
             ts.setTextRange(constructorFunction, constructor || node);
             if (extendsClauseElement) {
-                ts.setEmitFlags(constructorFunction, 8 /* CapturesThis */);
+                ts.setEmitFlags(constructorFunction, 8);
             }
             statements.push(constructorFunction);
-            exitSubtree(ancestorFacts, 49152 /* PropagateNewTargetMask */, 0 /* None */);
+            exitSubtree(ancestorFacts, 49152, 0);
             convertedLoopState = savedConvertedLoopState;
         }
-        /**
-         * Transforms the parameters of the constructor declaration of a class.
-         *
-         * @param constructor The constructor for the class.
-         * @param hasSynthesizedSuper A value indicating whether the constructor starts with a
-         *                            synthesized `super` call.
-         */
         function transformConstructorParameters(constructor, hasSynthesizedSuper) {
-            // If the TypeScript transformer needed to synthesize a constructor for property
-            // initializers, it would have also added a synthetic `...args` parameter and
-            // `super` call.
-            // If this is the case, we do not include the synthetic `...args` parameter and
-            // will instead use the `arguments` object in ES5/3.
             return ts.visitParameterList(constructor && !hasSynthesizedSuper ? constructor.parameters : undefined, visitor, context)
                 || [];
         }
-        /**
-         * Transforms the body of a constructor declaration of a class.
-         *
-         * @param constructor The constructor for the class.
-         * @param node The node which contains the constructor.
-         * @param extendsClauseElement The expression for the class `extends` clause.
-         * @param hasSynthesizedSuper A value indicating whether the constructor starts with a
-         *                            synthesized `super` call.
-         */
         function transformConstructorBody(constructor, node, extendsClauseElement, hasSynthesizedSuper) {
             var statements = [];
             resumeLexicalEnvironment();
             var statementOffset = -1;
             if (hasSynthesizedSuper) {
-                // If a super call has already been synthesized,
-                // we're going to assume that we should just transform everything after that.
-                // The assumption is that no prior step in the pipeline has added any prologue directives.
                 statementOffset = 0;
             }
             else if (constructor) {
-                statementOffset = ts.addStandardPrologue(statements, constructor.body.statements, /*ensureUseStrict*/ false);
+                statementOffset = ts.addStandardPrologue(statements, constructor.body.statements, false);
             }
             if (constructor) {
                 addDefaultValueAssignmentsIfNeeded(statements, constructor);
                 addRestParameterIfNeeded(statements, constructor, hasSynthesizedSuper);
                 if (!hasSynthesizedSuper) {
-                    // If no super call has been synthesized, emit custom prologue directives.
                     statementOffset = ts.addCustomPrologue(statements, constructor.body.statements, statementOffset, visitor);
                 }
                 ts.Debug.assert(statementOffset >= 0, "statementOffset not initialized correctly!");
             }
-            // determine whether the class is known syntactically to be a derived class (e.g. a
-            // class that extends a value that is not syntactically known to be `null`).
-            var isDerivedClass = !!extendsClauseElement && ts.skipOuterExpressions(extendsClauseElement.expression).kind !== 95 /* NullKeyword */;
+            var isDerivedClass = !!extendsClauseElement && ts.skipOuterExpressions(extendsClauseElement.expression).kind !== 95;
             var superCaptureStatus = declareOrCaptureOrReturnThisForConstructorIfNeeded(statements, constructor, isDerivedClass, hasSynthesizedSuper, statementOffset);
-            // The last statement expression was replaced. Skip it.
-            if (superCaptureStatus === 1 /* ReplaceSuperCapture */ || superCaptureStatus === 2 /* ReplaceWithReturn */) {
+            if (superCaptureStatus === 1 || superCaptureStatus === 2) {
                 statementOffset++;
             }
             if (constructor) {
-                if (superCaptureStatus === 1 /* ReplaceSuperCapture */) {
-                    hierarchyFacts |= 4096 /* ConstructorWithCapturedSuper */;
+                if (superCaptureStatus === 1) {
+                    hierarchyFacts |= 4096;
                 }
-                ts.addRange(statements, ts.visitNodes(constructor.body.statements, visitor, ts.isStatement, /*start*/ statementOffset));
+                ts.addRange(statements, ts.visitNodes(constructor.body.statements, visitor, ts.isStatement, statementOffset));
             }
-            // Return `_this` unless we're sure enough that it would be pointless to add a return statement.
-            // If there's a constructor that we can tell returns in enough places, then we *do not* want to add a return.
             if (isDerivedClass
-                && superCaptureStatus !== 2 /* ReplaceWithReturn */
+                && superCaptureStatus !== 2
                 && !(constructor && isSufficientlyCoveredByReturnStatements(constructor.body))) {
                 statements.push(ts.createReturn(ts.createFileLevelUniqueName("_this")));
             }
             ts.prependStatements(statements, endLexicalEnvironment());
             if (constructor) {
-                prependCaptureNewTargetIfNeeded(statements, constructor, /*copyOnWrite*/ false);
+                prependCaptureNewTargetIfNeeded(statements, constructor, false);
             }
-            var block = ts.createBlock(ts.setTextRange(ts.createNodeArray(statements), 
-            /*location*/ constructor ? constructor.body.statements : node.members), 
-            /*multiLine*/ true);
+            var block = ts.createBlock(ts.setTextRange(ts.createNodeArray(statements), constructor ? constructor.body.statements : node.members), true);
             ts.setTextRange(block, constructor ? constructor.body : node);
             if (!constructor) {
-                ts.setEmitFlags(block, 1536 /* NoComments */);
+                ts.setEmitFlags(block, 1536);
             }
             return block;
         }
-        /**
-         * We want to try to avoid emitting a return statement in certain cases if a user already returned something.
-         * It would generate obviously dead code, so we'll try to make things a little bit prettier
-         * by doing a minimal check on whether some common patterns always explicitly return.
-         */
         function isSufficientlyCoveredByReturnStatements(statement) {
-            // A return statement is considered covered.
-            if (statement.kind === 225 /* ReturnStatement */) {
+            if (statement.kind === 225) {
                 return true;
             }
-            // An if-statement with two covered branches is covered.
-            else if (statement.kind === 217 /* IfStatement */) {
+            else if (statement.kind === 217) {
                 var ifStatement = statement;
                 if (ifStatement.elseStatement) {
                     return isSufficientlyCoveredByReturnStatements(ifStatement.thenStatement) &&
                         isSufficientlyCoveredByReturnStatements(ifStatement.elseStatement);
                 }
             }
-            // A block is covered if it has a last statement which is covered.
-            else if (statement.kind === 213 /* Block */) {
+            else if (statement.kind === 213) {
                 var lastStatement = ts.lastOrUndefined(statement.statements);
                 if (lastStatement && isSufficientlyCoveredByReturnStatements(lastStatement)) {
                     return true;
@@ -66451,144 +54629,72 @@ var ts;
             }
             return false;
         }
-        /**
-         * Declares a `_this` variable for derived classes and for when arrow functions capture `this`.
-         *
-         * @returns The new statement offset into the `statements` array.
-         */
         function declareOrCaptureOrReturnThisForConstructorIfNeeded(statements, ctor, isDerivedClass, hasSynthesizedSuper, statementOffset) {
-            // If this isn't a derived class, just capture 'this' for arrow functions if necessary.
             if (!isDerivedClass) {
                 if (ctor) {
                     addCaptureThisForNodeIfNeeded(statements, ctor);
                 }
-                return 0 /* NoReplacement */;
+                return 0;
             }
-            // We must be here because the user didn't write a constructor
-            // but we needed to call 'super(...args)' anyway as per 14.5.14 of the ES2016 spec.
-            // If that's the case we can just immediately return the result of a 'super()' call.
             if (!ctor) {
                 statements.push(ts.createReturn(createDefaultSuperCallOrThis()));
-                return 2 /* ReplaceWithReturn */;
+                return 2;
             }
-            // The constructor exists, but it and the 'super()' call it contains were generated
-            // for something like property initializers.
-            // Create a captured '_this' variable and assume it will subsequently be used.
             if (hasSynthesizedSuper) {
                 captureThisForNode(statements, ctor, createDefaultSuperCallOrThis());
                 enableSubstitutionsForCapturedThis();
-                return 1 /* ReplaceSuperCapture */;
-            }
-            // Most of the time, a 'super' call will be the first real statement in a constructor body.
-            // In these cases, we'd like to transform these into a *single* statement instead of a declaration
-            // followed by an assignment statement for '_this'. For instance, if we emitted without an initializer,
-            // we'd get:
-            //
-            //      var _this;
-            //      _this = _super.call(...) || this;
-            //
-            // instead of
-            //
-            //      var _this = _super.call(...) || this;
-            //
-            // Additionally, if the 'super()' call is the last statement, we should just avoid capturing
-            // entirely and immediately return the result like so:
-            //
-            //      return _super.call(...) || this;
-            //
+                return 1;
+            }
             var firstStatement;
             var superCallExpression;
             var ctorStatements = ctor.body.statements;
             if (statementOffset < ctorStatements.length) {
                 firstStatement = ctorStatements[statementOffset];
-                if (firstStatement.kind === 216 /* ExpressionStatement */ && ts.isSuperCall(firstStatement.expression)) {
+                if (firstStatement.kind === 216 && ts.isSuperCall(firstStatement.expression)) {
                     superCallExpression = visitImmediateSuperCallInBody(firstStatement.expression);
                 }
             }
-            // Return the result if we have an immediate super() call on the last statement,
-            // but only if the constructor itself doesn't use 'this' elsewhere.
             if (superCallExpression
                 && statementOffset === ctorStatements.length - 1
-                && !(ctor.transformFlags & (16384 /* ContainsLexicalThis */ | 32768 /* ContainsCapturedLexicalThis */))) {
+                && !(ctor.transformFlags & (16384 | 32768))) {
                 var returnStatement = ts.createReturn(superCallExpression);
-                if (superCallExpression.kind !== 200 /* BinaryExpression */
-                    || superCallExpression.left.kind !== 187 /* CallExpression */) {
+                if (superCallExpression.kind !== 200
+                    || superCallExpression.left.kind !== 187) {
                     ts.Debug.fail("Assumed generated super call would have form 'super.call(...) || this'.");
                 }
-                // Shift comments from the original super call to the return statement.
-                ts.setCommentRange(returnStatement, ts.getCommentRange(ts.setEmitFlags(superCallExpression.left, 1536 /* NoComments */)));
+                ts.setCommentRange(returnStatement, ts.getCommentRange(ts.setEmitFlags(superCallExpression.left, 1536)));
                 statements.push(returnStatement);
-                return 2 /* ReplaceWithReturn */;
+                return 2;
             }
-            // Perform the capture.
             captureThisForNode(statements, ctor, superCallExpression || createActualThis(), firstStatement);
-            // If we're actually replacing the original statement, we need to signal this to the caller.
             if (superCallExpression) {
-                return 1 /* ReplaceSuperCapture */;
+                return 1;
             }
-            return 0 /* NoReplacement */;
+            return 0;
         }
         function createActualThis() {
-            return ts.setEmitFlags(ts.createThis(), 4 /* NoSubstitution */);
+            return ts.setEmitFlags(ts.createThis(), 4);
         }
         function createDefaultSuperCallOrThis() {
             return ts.createLogicalOr(ts.createLogicalAnd(ts.createStrictInequality(ts.createFileLevelUniqueName("_super"), ts.createNull()), ts.createFunctionApply(ts.createFileLevelUniqueName("_super"), createActualThis(), ts.createIdentifier("arguments"))), createActualThis());
         }
-        /**
-         * Visits a parameter declaration.
-         *
-         * @param node A ParameterDeclaration node.
-         */
         function visitParameter(node) {
             if (node.dotDotDotToken) {
-                // rest parameters are elided
                 return undefined;
             }
             else if (ts.isBindingPattern(node.name)) {
-                // Binding patterns are converted into a generated name and are
-                // evaluated inside the function body.
-                return ts.setOriginalNode(ts.setTextRange(ts.createParameter(
-                /*decorators*/ undefined, 
-                /*modifiers*/ undefined, 
-                /*dotDotDotToken*/ undefined, ts.getGeneratedNameForNode(node), 
-                /*questionToken*/ undefined, 
-                /*type*/ undefined, 
-                /*initializer*/ undefined), 
-                /*location*/ node), 
-                /*original*/ node);
+                return ts.setOriginalNode(ts.setTextRange(ts.createParameter(undefined, undefined, undefined, ts.getGeneratedNameForNode(node), undefined, undefined, undefined), node), node);
             }
             else if (node.initializer) {
-                // Initializers are elided
-                return ts.setOriginalNode(ts.setTextRange(ts.createParameter(
-                /*decorators*/ undefined, 
-                /*modifiers*/ undefined, 
-                /*dotDotDotToken*/ undefined, node.name, 
-                /*questionToken*/ undefined, 
-                /*type*/ undefined, 
-                /*initializer*/ undefined), 
-                /*location*/ node), 
-                /*original*/ node);
+                return ts.setOriginalNode(ts.setTextRange(ts.createParameter(undefined, undefined, undefined, node.name, undefined, undefined, undefined), node), node);
             }
             else {
                 return node;
             }
         }
-        /**
-         * Gets a value indicating whether we need to add default value assignments for a
-         * function-like node.
-         *
-         * @param node A function-like node.
-         */
         function shouldAddDefaultValueAssignments(node) {
-            return (node.transformFlags & 131072 /* ContainsDefaultValueAssignments */) !== 0;
-        }
-        /**
-         * Adds statements to the body of a function-like node if it contains parameters with
-         * binding patterns or initializers.
-         *
-         * @param statements The statements for the new function body.
-         * @param node A function-like node.
-         */
+            return (node.transformFlags & 131072) !== 0;
+        }
         function addDefaultValueAssignmentsIfNeeded(statements, node) {
             if (!shouldAddDefaultValueAssignments(node)) {
                 return;
@@ -66596,8 +54702,6 @@ var ts;
             for (var _i = 0, _a = node.parameters; _i < _a.length; _i++) {
                 var parameter = _a[_i];
                 var name = parameter.name, initializer = parameter.initializer, dotDotDotToken = parameter.dotDotDotToken;
-                // A rest parameter cannot have a binding pattern or an initializer,
-                // so let's just ignore it.
                 if (dotDotDotToken) {
                     continue;
                 }
@@ -66609,153 +54713,90 @@ var ts;
                 }
             }
         }
-        /**
-         * Adds statements to the body of a function-like node for parameters with binding patterns
-         *
-         * @param statements The statements for the new function body.
-         * @param parameter The parameter for the function.
-         * @param name The name of the parameter.
-         * @param initializer The initializer for the parameter.
-         */
         function addDefaultValueAssignmentForBindingPattern(statements, parameter, name, initializer) {
             var temp = ts.getGeneratedNameForNode(parameter);
-            // In cases where a binding pattern is simply '[]' or '{}',
-            // we usually don't want to emit a var declaration; however, in the presence
-            // of an initializer, we must emit that expression to preserve side effects.
             if (name.elements.length > 0) {
-                statements.push(ts.setEmitFlags(ts.createVariableStatement(
-                /*modifiers*/ undefined, ts.createVariableDeclarationList(ts.flattenDestructuringBinding(parameter, visitor, context, 0 /* All */, temp))), 1048576 /* CustomPrologue */));
+                statements.push(ts.setEmitFlags(ts.createVariableStatement(undefined, ts.createVariableDeclarationList(ts.flattenDestructuringBinding(parameter, visitor, context, 0, temp))), 1048576));
             }
             else if (initializer) {
-                statements.push(ts.setEmitFlags(ts.createStatement(ts.createAssignment(temp, ts.visitNode(initializer, visitor, ts.isExpression))), 1048576 /* CustomPrologue */));
+                statements.push(ts.setEmitFlags(ts.createStatement(ts.createAssignment(temp, ts.visitNode(initializer, visitor, ts.isExpression))), 1048576));
             }
         }
-        /**
-         * Adds statements to the body of a function-like node for parameters with initializers.
-         *
-         * @param statements The statements for the new function body.
-         * @param parameter The parameter for the function.
-         * @param name The name of the parameter.
-         * @param initializer The initializer for the parameter.
-         */
         function addDefaultValueAssignmentForInitializer(statements, parameter, name, initializer) {
             initializer = ts.visitNode(initializer, visitor, ts.isExpression);
             var statement = ts.createIf(ts.createTypeCheck(ts.getSynthesizedClone(name), "undefined"), ts.setEmitFlags(ts.setTextRange(ts.createBlock([
-                ts.createStatement(ts.setEmitFlags(ts.setTextRange(ts.createAssignment(ts.setEmitFlags(ts.getMutableClone(name), 48 /* NoSourceMap */), ts.setEmitFlags(initializer, 48 /* NoSourceMap */ | ts.getEmitFlags(initializer) | 1536 /* NoComments */)), parameter), 1536 /* NoComments */))
-            ]), parameter), 1 /* SingleLine */ | 32 /* NoTrailingSourceMap */ | 384 /* NoTokenSourceMaps */ | 1536 /* NoComments */));
+                ts.createStatement(ts.setEmitFlags(ts.setTextRange(ts.createAssignment(ts.setEmitFlags(ts.getMutableClone(name), 48), ts.setEmitFlags(initializer, 48 | ts.getEmitFlags(initializer) | 1536)), parameter), 1536))
+            ]), parameter), 1 | 32 | 384 | 1536));
             ts.startOnNewLine(statement);
             ts.setTextRange(statement, parameter);
-            ts.setEmitFlags(statement, 384 /* NoTokenSourceMaps */ | 32 /* NoTrailingSourceMap */ | 1048576 /* CustomPrologue */ | 1536 /* NoComments */);
+            ts.setEmitFlags(statement, 384 | 32 | 1048576 | 1536);
             statements.push(statement);
         }
-        /**
-         * Gets a value indicating whether we need to add statements to handle a rest parameter.
-         *
-         * @param node A ParameterDeclaration node.
-         * @param inConstructorWithSynthesizedSuper A value indicating whether the parameter is
-         *                                          part of a constructor declaration with a
-         *                                          synthesized call to `super`
-         */
         function shouldAddRestParameter(node, inConstructorWithSynthesizedSuper) {
-            return node && node.dotDotDotToken && node.name.kind === 71 /* Identifier */ && !inConstructorWithSynthesizedSuper;
-        }
-        /**
-         * Adds statements to the body of a function-like node if it contains a rest parameter.
-         *
-         * @param statements The statements for the new function body.
-         * @param node A function-like node.
-         * @param inConstructorWithSynthesizedSuper A value indicating whether the parameter is
-         *                                          part of a constructor declaration with a
-         *                                          synthesized call to `super`
-         */
+            return node && node.dotDotDotToken && node.name.kind === 71 && !inConstructorWithSynthesizedSuper;
+        }
         function addRestParameterIfNeeded(statements, node, inConstructorWithSynthesizedSuper) {
             var parameter = ts.lastOrUndefined(node.parameters);
             if (!shouldAddRestParameter(parameter, inConstructorWithSynthesizedSuper)) {
                 return;
             }
-            // `declarationName` is the name of the local declaration for the parameter.
             var declarationName = ts.getMutableClone(parameter.name);
-            ts.setEmitFlags(declarationName, 48 /* NoSourceMap */);
-            // `expressionName` is the name of the parameter used in expressions.
+            ts.setEmitFlags(declarationName, 48);
             var expressionName = ts.getSynthesizedClone(parameter.name);
             var restIndex = node.parameters.length - 1;
             var temp = ts.createLoopVariable();
-            // var param = [];
-            statements.push(ts.setEmitFlags(ts.setTextRange(ts.createVariableStatement(
-            /*modifiers*/ undefined, ts.createVariableDeclarationList([
-                ts.createVariableDeclaration(declarationName, 
-                /*type*/ undefined, ts.createArrayLiteral([]))
-            ])), 
-            /*location*/ parameter), 1048576 /* CustomPrologue */));
-            // for (var _i = restIndex; _i < arguments.length; _i++) {
-            //   param[_i - restIndex] = arguments[_i];
-            // }
+            statements.push(ts.setEmitFlags(ts.setTextRange(ts.createVariableStatement(undefined, ts.createVariableDeclarationList([
+                ts.createVariableDeclaration(declarationName, undefined, ts.createArrayLiteral([]))
+            ])), parameter), 1048576));
             var forStatement = ts.createFor(ts.setTextRange(ts.createVariableDeclarationList([
-                ts.createVariableDeclaration(temp, /*type*/ undefined, ts.createLiteral(restIndex))
+                ts.createVariableDeclaration(temp, undefined, ts.createLiteral(restIndex))
             ]), parameter), ts.setTextRange(ts.createLessThan(temp, ts.createPropertyAccess(ts.createIdentifier("arguments"), "length")), parameter), ts.setTextRange(ts.createPostfixIncrement(temp), parameter), ts.createBlock([
                 ts.startOnNewLine(ts.setTextRange(ts.createStatement(ts.createAssignment(ts.createElementAccess(expressionName, restIndex === 0
                     ? temp
-                    : ts.createSubtract(temp, ts.createLiteral(restIndex))), ts.createElementAccess(ts.createIdentifier("arguments"), temp))), 
-                /*location*/ parameter))
+                    : ts.createSubtract(temp, ts.createLiteral(restIndex))), ts.createElementAccess(ts.createIdentifier("arguments"), temp))), parameter))
             ]));
-            ts.setEmitFlags(forStatement, 1048576 /* CustomPrologue */);
+            ts.setEmitFlags(forStatement, 1048576);
             ts.startOnNewLine(forStatement);
             statements.push(forStatement);
         }
-        /**
-         * Adds a statement to capture the `this` of a function declaration if it is needed.
-         *
-         * @param statements The statements for the new function body.
-         * @param node A node.
-         */
         function addCaptureThisForNodeIfNeeded(statements, node) {
-            if (node.transformFlags & 32768 /* ContainsCapturedLexicalThis */ && node.kind !== 193 /* ArrowFunction */) {
+            if (node.transformFlags & 32768 && node.kind !== 193) {
                 captureThisForNode(statements, node, ts.createThis());
             }
         }
         function captureThisForNode(statements, node, initializer, originalStatement) {
             enableSubstitutionsForCapturedThis();
-            var captureThisStatement = ts.createVariableStatement(
-            /*modifiers*/ undefined, ts.createVariableDeclarationList([
-                ts.createVariableDeclaration(ts.createFileLevelUniqueName("_this"), 
-                /*type*/ undefined, initializer)
+            var captureThisStatement = ts.createVariableStatement(undefined, ts.createVariableDeclarationList([
+                ts.createVariableDeclaration(ts.createFileLevelUniqueName("_this"), undefined, initializer)
             ]));
-            ts.setEmitFlags(captureThisStatement, 1536 /* NoComments */ | 1048576 /* CustomPrologue */);
+            ts.setEmitFlags(captureThisStatement, 1536 | 1048576);
             ts.setTextRange(captureThisStatement, originalStatement);
             ts.setSourceMapRange(captureThisStatement, node);
             statements.push(captureThisStatement);
         }
         function prependCaptureNewTargetIfNeeded(statements, node, copyOnWrite) {
-            if (hierarchyFacts & 16384 /* NewTarget */) {
+            if (hierarchyFacts & 16384) {
                 var newTarget = void 0;
                 switch (node.kind) {
-                    case 193 /* ArrowFunction */:
+                    case 193:
                         return statements;
-                    case 154 /* MethodDeclaration */:
-                    case 156 /* GetAccessor */:
-                    case 157 /* SetAccessor */:
-                        // Methods and accessors cannot be constructors, so 'new.target' will
-                        // always return 'undefined'.
+                    case 154:
+                    case 156:
+                    case 157:
                         newTarget = ts.createVoidZero();
                         break;
-                    case 155 /* Constructor */:
-                        // Class constructors can only be called with `new`, so `this.constructor`
-                        // should be relatively safe to use.
-                        newTarget = ts.createPropertyAccess(ts.setEmitFlags(ts.createThis(), 4 /* NoSubstitution */), "constructor");
+                    case 155:
+                        newTarget = ts.createPropertyAccess(ts.setEmitFlags(ts.createThis(), 4), "constructor");
                         break;
-                    case 234 /* FunctionDeclaration */:
-                    case 192 /* FunctionExpression */:
-                        // Functions can be called or constructed, and may have a `this` due to
-                        // being a member or when calling an imported function via `other_1.f()`.
-                        newTarget = ts.createConditional(ts.createLogicalAnd(ts.setEmitFlags(ts.createThis(), 4 /* NoSubstitution */), ts.createBinary(ts.setEmitFlags(ts.createThis(), 4 /* NoSubstitution */), 93 /* InstanceOfKeyword */, ts.getLocalName(node))), ts.createPropertyAccess(ts.setEmitFlags(ts.createThis(), 4 /* NoSubstitution */), "constructor"), ts.createVoidZero());
+                    case 234:
+                    case 192:
+                        newTarget = ts.createConditional(ts.createLogicalAnd(ts.setEmitFlags(ts.createThis(), 4), ts.createBinary(ts.setEmitFlags(ts.createThis(), 4), 93, ts.getLocalName(node))), ts.createPropertyAccess(ts.setEmitFlags(ts.createThis(), 4), "constructor"), ts.createVoidZero());
                         break;
                     default:
                         return ts.Debug.failBadSyntaxKind(node);
                 }
-                var captureNewTargetStatement = ts.createVariableStatement(
-                /*modifiers*/ undefined, ts.createVariableDeclarationList([
-                    ts.createVariableDeclaration(ts.createFileLevelUniqueName("_newTarget"), 
-                    /*type*/ undefined, newTarget)
+                var captureNewTargetStatement = ts.createVariableStatement(undefined, ts.createVariableDeclarationList([
+                    ts.createVariableDeclaration(ts.createFileLevelUniqueName("_newTarget"), undefined, newTarget)
                 ]));
                 if (copyOnWrite) {
                     return [captureNewTargetStatement].concat(statements);
@@ -66764,32 +54805,24 @@ var ts;
             }
             return statements;
         }
-        /**
-         * Adds statements to the class body function for a class to define the members of the
-         * class.
-         *
-         * @param statements The statements for the class body function.
-         * @param node The ClassExpression or ClassDeclaration node.
-         */
         function addClassMembers(statements, node) {
             for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
                 var member = _a[_i];
                 switch (member.kind) {
-                    case 212 /* SemicolonClassElement */:
+                    case 212:
                         statements.push(transformSemicolonClassElementToStatement(member));
                         break;
-                    case 154 /* MethodDeclaration */:
+                    case 154:
                         statements.push(transformClassMethodDeclarationToStatement(getClassMemberPrefix(node, member), member, node));
                         break;
-                    case 156 /* GetAccessor */:
-                    case 157 /* SetAccessor */:
+                    case 156:
+                    case 157:
                         var accessors = ts.getAllAccessorDeclarations(node.members, member);
                         if (member === accessors.firstAccessor) {
                             statements.push(transformAccessorsToStatement(getClassMemberPrefix(node, member), accessors, node));
                         }
                         break;
-                    case 155 /* Constructor */:
-                        // Constructors are handled in visitClassExpression/visitClassDeclaration
+                    case 155:
                         break;
                     default:
                         ts.Debug.failBadSyntaxKind(node);
@@ -66797,208 +54830,133 @@ var ts;
                 }
             }
         }
-        /**
-         * Transforms a SemicolonClassElement into a statement for a class body function.
-         *
-         * @param member The SemicolonClassElement node.
-         */
         function transformSemicolonClassElementToStatement(member) {
             return ts.setTextRange(ts.createEmptyStatement(), member);
         }
-        /**
-         * Transforms a MethodDeclaration into a statement for a class body function.
-         *
-         * @param receiver The receiver for the member.
-         * @param member The MethodDeclaration node.
-         */
         function transformClassMethodDeclarationToStatement(receiver, member, container) {
-            var ancestorFacts = enterSubtree(0 /* None */, 0 /* None */);
+            var ancestorFacts = enterSubtree(0, 0);
             var commentRange = ts.getCommentRange(member);
             var sourceMapRange = ts.getSourceMapRange(member);
-            var memberName = ts.createMemberAccessForPropertyName(receiver, ts.visitNode(member.name, visitor, ts.isPropertyName), /*location*/ member.name);
-            var memberFunction = transformFunctionLikeToExpression(member, /*location*/ member, /*name*/ undefined, container);
-            ts.setEmitFlags(memberFunction, 1536 /* NoComments */);
+            var memberName = ts.createMemberAccessForPropertyName(receiver, ts.visitNode(member.name, visitor, ts.isPropertyName), member.name);
+            var memberFunction = transformFunctionLikeToExpression(member, member, undefined, container);
+            ts.setEmitFlags(memberFunction, 1536);
             ts.setSourceMapRange(memberFunction, sourceMapRange);
-            var statement = ts.setTextRange(ts.createStatement(ts.createAssignment(memberName, memberFunction)), 
-            /*location*/ member);
+            var statement = ts.setTextRange(ts.createStatement(ts.createAssignment(memberName, memberFunction)), member);
             ts.setOriginalNode(statement, member);
             ts.setCommentRange(statement, commentRange);
-            // The location for the statement is used to emit comments only.
-            // No source map should be emitted for this statement to align with the
-            // old emitter.
-            ts.setEmitFlags(statement, 48 /* NoSourceMap */);
-            exitSubtree(ancestorFacts, 49152 /* PropagateNewTargetMask */, hierarchyFacts & 49152 /* PropagateNewTargetMask */ ? 16384 /* NewTarget */ : 0 /* None */);
+            ts.setEmitFlags(statement, 48);
+            exitSubtree(ancestorFacts, 49152, hierarchyFacts & 49152 ? 16384 : 0);
             return statement;
         }
-        /**
-         * Transforms a set of related of get/set accessors into a statement for a class body function.
-         *
-         * @param receiver The receiver for the member.
-         * @param accessors The set of related get/set accessors.
-         */
         function transformAccessorsToStatement(receiver, accessors, container) {
-            var statement = ts.createStatement(transformAccessorsToExpression(receiver, accessors, container, /*startsOnNewLine*/ false));
-            // The location for the statement is used to emit source maps only.
-            // No comments should be emitted for this statement to align with the
-            // old emitter.
-            ts.setEmitFlags(statement, 1536 /* NoComments */);
+            var statement = ts.createStatement(transformAccessorsToExpression(receiver, accessors, container, false));
+            ts.setEmitFlags(statement, 1536);
             ts.setSourceMapRange(statement, ts.getSourceMapRange(accessors.firstAccessor));
             return statement;
         }
-        /**
-         * Transforms a set of related get/set accessors into an expression for either a class
-         * body function or an ObjectLiteralExpression with computed properties.
-         *
-         * @param receiver The receiver for the member.
-         */
         function transformAccessorsToExpression(receiver, _a, container, startsOnNewLine) {
             var firstAccessor = _a.firstAccessor, getAccessor = _a.getAccessor, setAccessor = _a.setAccessor;
-            var ancestorFacts = enterSubtree(0 /* None */, 0 /* None */);
-            // To align with source maps in the old emitter, the receiver and property name
-            // arguments are both mapped contiguously to the accessor name.
+            var ancestorFacts = enterSubtree(0, 0);
             var target = ts.getMutableClone(receiver);
-            ts.setEmitFlags(target, 1536 /* NoComments */ | 32 /* NoTrailingSourceMap */);
-            ts.setSourceMapRange(target, firstAccessor.name); // TODO: GH#18217
+            ts.setEmitFlags(target, 1536 | 32);
+            ts.setSourceMapRange(target, firstAccessor.name);
             var propertyName = ts.createExpressionForPropertyName(ts.visitNode(firstAccessor.name, visitor, ts.isPropertyName));
-            ts.setEmitFlags(propertyName, 1536 /* NoComments */ | 16 /* NoLeadingSourceMap */);
+            ts.setEmitFlags(propertyName, 1536 | 16);
             ts.setSourceMapRange(propertyName, firstAccessor.name);
             var properties = [];
             if (getAccessor) {
-                var getterFunction = transformFunctionLikeToExpression(getAccessor, /*location*/ undefined, /*name*/ undefined, container);
+                var getterFunction = transformFunctionLikeToExpression(getAccessor, undefined, undefined, container);
                 ts.setSourceMapRange(getterFunction, ts.getSourceMapRange(getAccessor));
-                ts.setEmitFlags(getterFunction, 512 /* NoLeadingComments */);
+                ts.setEmitFlags(getterFunction, 512);
                 var getter = ts.createPropertyAssignment("get", getterFunction);
                 ts.setCommentRange(getter, ts.getCommentRange(getAccessor));
                 properties.push(getter);
             }
             if (setAccessor) {
-                var setterFunction = transformFunctionLikeToExpression(setAccessor, /*location*/ undefined, /*name*/ undefined, container);
+                var setterFunction = transformFunctionLikeToExpression(setAccessor, undefined, undefined, container);
                 ts.setSourceMapRange(setterFunction, ts.getSourceMapRange(setAccessor));
-                ts.setEmitFlags(setterFunction, 512 /* NoLeadingComments */);
+                ts.setEmitFlags(setterFunction, 512);
                 var setter = ts.createPropertyAssignment("set", setterFunction);
                 ts.setCommentRange(setter, ts.getCommentRange(setAccessor));
                 properties.push(setter);
             }
             properties.push(ts.createPropertyAssignment("enumerable", ts.createTrue()), ts.createPropertyAssignment("configurable", ts.createTrue()));
-            var call = ts.createCall(ts.createPropertyAccess(ts.createIdentifier("Object"), "defineProperty"), 
-            /*typeArguments*/ undefined, [
+            var call = ts.createCall(ts.createPropertyAccess(ts.createIdentifier("Object"), "defineProperty"), undefined, [
                 target,
                 propertyName,
-                ts.createObjectLiteral(properties, /*multiLine*/ true)
+                ts.createObjectLiteral(properties, true)
             ]);
             if (startsOnNewLine) {
                 ts.startOnNewLine(call);
             }
-            exitSubtree(ancestorFacts, 49152 /* PropagateNewTargetMask */, hierarchyFacts & 49152 /* PropagateNewTargetMask */ ? 16384 /* NewTarget */ : 0 /* None */);
+            exitSubtree(ancestorFacts, 49152, hierarchyFacts & 49152 ? 16384 : 0);
             return call;
         }
-        /**
-         * Visits an ArrowFunction and transforms it into a FunctionExpression.
-         *
-         * @param node An ArrowFunction node.
-         */
         function visitArrowFunction(node) {
-            if (node.transformFlags & 16384 /* ContainsLexicalThis */) {
+            if (node.transformFlags & 16384) {
                 enableSubstitutionsForCapturedThis();
             }
             var savedConvertedLoopState = convertedLoopState;
             convertedLoopState = undefined;
-            var ancestorFacts = enterSubtree(16256 /* ArrowFunctionExcludes */, 66 /* ArrowFunctionIncludes */);
-            var func = ts.createFunctionExpression(
-            /*modifiers*/ undefined, 
-            /*asteriskToken*/ undefined, 
-            /*name*/ undefined, 
-            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
-            /*type*/ undefined, transformFunctionBody(node));
+            var ancestorFacts = enterSubtree(16256, 66);
+            var func = ts.createFunctionExpression(undefined, undefined, undefined, undefined, ts.visitParameterList(node.parameters, visitor, context), undefined, transformFunctionBody(node));
             ts.setTextRange(func, node);
             ts.setOriginalNode(func, node);
-            ts.setEmitFlags(func, 8 /* CapturesThis */);
-            exitSubtree(ancestorFacts, 0 /* None */, 0 /* None */);
+            ts.setEmitFlags(func, 8);
+            exitSubtree(ancestorFacts, 0, 0);
             convertedLoopState = savedConvertedLoopState;
             return func;
         }
-        /**
-         * Visits a FunctionExpression node.
-         *
-         * @param node a FunctionExpression node.
-         */
         function visitFunctionExpression(node) {
-            var ancestorFacts = ts.getEmitFlags(node) & 262144 /* AsyncFunctionBody */
-                ? enterSubtree(16278 /* AsyncFunctionBodyExcludes */, 69 /* AsyncFunctionBodyIncludes */)
-                : enterSubtree(16286 /* FunctionExcludes */, 65 /* FunctionIncludes */);
+            var ancestorFacts = ts.getEmitFlags(node) & 262144
+                ? enterSubtree(16278, 69)
+                : enterSubtree(16286, 65);
             var savedConvertedLoopState = convertedLoopState;
             convertedLoopState = undefined;
             var parameters = ts.visitParameterList(node.parameters, visitor, context);
-            var body = node.transformFlags & 64 /* ES2015 */
+            var body = node.transformFlags & 64
                 ? transformFunctionBody(node)
                 : visitFunctionBodyDownLevel(node);
-            var name = hierarchyFacts & 16384 /* NewTarget */
+            var name = hierarchyFacts & 16384
                 ? ts.getLocalName(node)
                 : node.name;
-            exitSubtree(ancestorFacts, 49152 /* PropagateNewTargetMask */, 0 /* None */);
+            exitSubtree(ancestorFacts, 49152, 0);
             convertedLoopState = savedConvertedLoopState;
-            return ts.updateFunctionExpression(node, 
-            /*modifiers*/ undefined, node.asteriskToken, name, 
-            /*typeParameters*/ undefined, parameters, 
-            /*type*/ undefined, body);
-        }
-        /**
-         * Visits a FunctionDeclaration node.
-         *
-         * @param node a FunctionDeclaration node.
-         */
+            return ts.updateFunctionExpression(node, undefined, node.asteriskToken, name, undefined, parameters, undefined, body);
+        }
         function visitFunctionDeclaration(node) {
             var savedConvertedLoopState = convertedLoopState;
             convertedLoopState = undefined;
-            var ancestorFacts = enterSubtree(16286 /* FunctionExcludes */, 65 /* FunctionIncludes */);
+            var ancestorFacts = enterSubtree(16286, 65);
             var parameters = ts.visitParameterList(node.parameters, visitor, context);
-            var body = node.transformFlags & 64 /* ES2015 */
+            var body = node.transformFlags & 64
                 ? transformFunctionBody(node)
                 : visitFunctionBodyDownLevel(node);
-            var name = hierarchyFacts & 16384 /* NewTarget */
+            var name = hierarchyFacts & 16384
                 ? ts.getLocalName(node)
                 : node.name;
-            exitSubtree(ancestorFacts, 49152 /* PropagateNewTargetMask */, 0 /* None */);
+            exitSubtree(ancestorFacts, 49152, 0);
             convertedLoopState = savedConvertedLoopState;
-            return ts.updateFunctionDeclaration(node, 
-            /*decorators*/ undefined, ts.visitNodes(node.modifiers, visitor, ts.isModifier), node.asteriskToken, name, 
-            /*typeParameters*/ undefined, parameters, 
-            /*type*/ undefined, body);
-        }
-        /**
-         * Transforms a function-like node into a FunctionExpression.
-         *
-         * @param node The function-like node to transform.
-         * @param location The source-map location for the new FunctionExpression.
-         * @param name The name of the new FunctionExpression.
-         */
+            return ts.updateFunctionDeclaration(node, undefined, ts.visitNodes(node.modifiers, visitor, ts.isModifier), node.asteriskToken, name, undefined, parameters, undefined, body);
+        }
         function transformFunctionLikeToExpression(node, location, name, container) {
             var savedConvertedLoopState = convertedLoopState;
             convertedLoopState = undefined;
-            var ancestorFacts = container && ts.isClassLike(container) && !ts.hasModifier(node, 32 /* Static */)
-                ? enterSubtree(16286 /* FunctionExcludes */, 65 /* FunctionIncludes */ | 8 /* NonStaticClassElement */)
-                : enterSubtree(16286 /* FunctionExcludes */, 65 /* FunctionIncludes */);
+            var ancestorFacts = container && ts.isClassLike(container) && !ts.hasModifier(node, 32)
+                ? enterSubtree(16286, 65 | 8)
+                : enterSubtree(16286, 65);
             var parameters = ts.visitParameterList(node.parameters, visitor, context);
             var body = transformFunctionBody(node);
-            if (hierarchyFacts & 16384 /* NewTarget */ && !name && (node.kind === 234 /* FunctionDeclaration */ || node.kind === 192 /* FunctionExpression */)) {
+            if (hierarchyFacts & 16384 && !name && (node.kind === 234 || node.kind === 192)) {
                 name = ts.getGeneratedNameForNode(node);
             }
-            exitSubtree(ancestorFacts, 49152 /* PropagateNewTargetMask */, 0 /* None */);
+            exitSubtree(ancestorFacts, 49152, 0);
             convertedLoopState = savedConvertedLoopState;
-            return ts.setOriginalNode(ts.setTextRange(ts.createFunctionExpression(
-            /*modifiers*/ undefined, node.asteriskToken, name, 
-            /*typeParameters*/ undefined, parameters, 
-            /*type*/ undefined, body), location), 
-            /*original*/ node);
-        }
-        /**
-         * Transforms the body of a function-like node.
-         *
-         * @param node A function-like node.
-         */
+            return ts.setOriginalNode(ts.setTextRange(ts.createFunctionExpression(undefined, node.asteriskToken, name, undefined, parameters, undefined, body), location), node);
+        }
         function transformFunctionBody(node) {
-            var multiLine = false; // indicates whether the block *must* be emitted as multiple lines
-            var singleLine = false; // indicates whether the block *may* be emitted as a single line
+            var multiLine = false;
+            var singleLine = false;
             var statementsLocation;
             var closeBraceLocation;
             var leadingStatements = [];
@@ -67007,29 +54965,21 @@ var ts;
             var statementOffset;
             resumeLexicalEnvironment();
             if (ts.isBlock(body)) {
-                // ensureUseStrict is false because no new prologue-directive should be added.
-                // addStandardPrologue will put already-existing directives at the beginning of the target statement-array
-                statementOffset = ts.addStandardPrologue(leadingStatements, body.statements, /*ensureUseStrict*/ false);
+                statementOffset = ts.addStandardPrologue(leadingStatements, body.statements, false);
             }
             addCaptureThisForNodeIfNeeded(leadingStatements, node);
             addDefaultValueAssignmentsIfNeeded(leadingStatements, node);
-            addRestParameterIfNeeded(leadingStatements, node, /*inConstructorWithSynthesizedSuper*/ false);
+            addRestParameterIfNeeded(leadingStatements, node, false);
             if (ts.isBlock(body)) {
-                // addCustomPrologue puts already-existing directives at the beginning of the target statement-array
                 statementOffset = ts.addCustomPrologue(leadingStatements, body.statements, statementOffset, visitor);
                 statementsLocation = body.statements;
                 ts.addRange(statements, ts.visitNodes(body.statements, visitor, ts.isStatement, statementOffset));
-                // If the original body was a multi-line block, this must be a multi-line block.
                 if (!multiLine && body.multiLine) {
                     multiLine = true;
                 }
             }
             else {
-                ts.Debug.assert(node.kind === 193 /* ArrowFunction */);
-                // To align with the old emitter, we use a synthetic end position on the location
-                // for the statement list we synthesize when we down-level an arrow function with
-                // an expression function body. This prevents both comments and source maps from
-                // being emitted for the end position only.
+                ts.Debug.assert(node.kind === 193);
                 statementsLocation = ts.moveRangeEnd(body, -1);
                 var equalsGreaterThanToken = node.equalsGreaterThanToken;
                 if (!ts.nodeIsSynthesized(equalsGreaterThanToken) && !ts.nodeIsSynthesized(body)) {
@@ -67044,103 +54994,72 @@ var ts;
                 var returnStatement = ts.createReturn(expression);
                 ts.setTextRange(returnStatement, body);
                 ts.moveSyntheticComments(returnStatement, body);
-                ts.setEmitFlags(returnStatement, 384 /* NoTokenSourceMaps */ | 32 /* NoTrailingSourceMap */ | 1024 /* NoTrailingComments */);
+                ts.setEmitFlags(returnStatement, 384 | 32 | 1024);
                 statements.push(returnStatement);
-                // To align with the source map emit for the old emitter, we set a custom
-                // source map location for the close brace.
                 closeBraceLocation = body;
             }
             var lexicalEnvironment = context.endLexicalEnvironment();
             ts.prependStatements(statements, lexicalEnvironment);
-            prependCaptureNewTargetIfNeeded(statements, node, /*copyOnWrite*/ false);
-            // If we added any final generated statements, this must be a multi-line block
+            prependCaptureNewTargetIfNeeded(statements, node, false);
             if (ts.some(leadingStatements) || ts.some(lexicalEnvironment)) {
                 multiLine = true;
             }
             var block = ts.createBlock(ts.setTextRange(ts.createNodeArray(leadingStatements.concat(statements)), statementsLocation), multiLine);
             ts.setTextRange(block, node.body);
             if (!multiLine && singleLine) {
-                ts.setEmitFlags(block, 1 /* SingleLine */);
+                ts.setEmitFlags(block, 1);
             }
             if (closeBraceLocation) {
-                ts.setTokenSourceMapRange(block, 18 /* CloseBraceToken */, closeBraceLocation);
+                ts.setTokenSourceMapRange(block, 18, closeBraceLocation);
             }
             ts.setOriginalNode(block, node.body);
             return block;
         }
         function visitFunctionBodyDownLevel(node) {
             var updated = ts.visitFunctionBody(node.body, functionBodyVisitor, context);
-            return ts.updateBlock(updated, ts.setTextRange(ts.createNodeArray(prependCaptureNewTargetIfNeeded(updated.statements, node, /*copyOnWrite*/ true)), 
-            /*location*/ updated.statements));
+            return ts.updateBlock(updated, ts.setTextRange(ts.createNodeArray(prependCaptureNewTargetIfNeeded(updated.statements, node, true)), updated.statements));
         }
         function visitBlock(node, isFunctionBody) {
             if (isFunctionBody) {
-                // A function body is not a block scope.
                 return ts.visitEachChild(node, visitor, context);
             }
-            var ancestorFacts = hierarchyFacts & 256 /* IterationStatement */
-                ? enterSubtree(4032 /* IterationStatementBlockExcludes */, 512 /* IterationStatementBlockIncludes */)
-                : enterSubtree(3904 /* BlockExcludes */, 128 /* BlockIncludes */);
+            var ancestorFacts = hierarchyFacts & 256
+                ? enterSubtree(4032, 512)
+                : enterSubtree(3904, 128);
             var updated = ts.visitEachChild(node, visitor, context);
-            exitSubtree(ancestorFacts, 0 /* None */, 0 /* None */);
+            exitSubtree(ancestorFacts, 0, 0);
             return updated;
         }
-        /**
-         * Visits an ExpressionStatement that contains a destructuring assignment.
-         *
-         * @param node An ExpressionStatement node.
-         */
         function visitExpressionStatement(node) {
-            // If we are here it is most likely because our expression is a destructuring assignment.
             switch (node.expression.kind) {
-                case 191 /* ParenthesizedExpression */:
-                    return ts.updateStatement(node, visitParenthesizedExpression(node.expression, /*needsDestructuringValue*/ false));
-                case 200 /* BinaryExpression */:
-                    return ts.updateStatement(node, visitBinaryExpression(node.expression, /*needsDestructuringValue*/ false));
+                case 191:
+                    return ts.updateStatement(node, visitParenthesizedExpression(node.expression, false));
+                case 200:
+                    return ts.updateStatement(node, visitBinaryExpression(node.expression, false));
             }
             return ts.visitEachChild(node, visitor, context);
         }
-        /**
-         * Visits a ParenthesizedExpression that may contain a destructuring assignment.
-         *
-         * @param node A ParenthesizedExpression node.
-         * @param needsDestructuringValue A value indicating whether we need to hold onto the rhs
-         *                                of a destructuring assignment.
-         */
         function visitParenthesizedExpression(node, needsDestructuringValue) {
-            // If we are here it is most likely because our expression is a destructuring assignment.
             if (!needsDestructuringValue) {
-                // By default we always emit the RHS at the end of a flattened destructuring
-                // expression. If we are in a state where we do not need the destructuring value,
-                // we pass that information along to the children that care about it.
                 switch (node.expression.kind) {
-                    case 191 /* ParenthesizedExpression */:
-                        return ts.updateParen(node, visitParenthesizedExpression(node.expression, /*needsDestructuringValue*/ false));
-                    case 200 /* BinaryExpression */:
-                        return ts.updateParen(node, visitBinaryExpression(node.expression, /*needsDestructuringValue*/ false));
+                    case 191:
+                        return ts.updateParen(node, visitParenthesizedExpression(node.expression, false));
+                    case 200:
+                        return ts.updateParen(node, visitBinaryExpression(node.expression, false));
                 }
             }
             return ts.visitEachChild(node, visitor, context);
         }
-        /**
-         * Visits a BinaryExpression that contains a destructuring assignment.
-         *
-         * @param node A BinaryExpression node.
-         * @param needsDestructuringValue A value indicating whether we need to hold onto the rhs
-         *                                of a destructuring assignment.
-         */
         function visitBinaryExpression(node, needsDestructuringValue) {
-            // If we are here it is because this is a destructuring assignment.
             if (ts.isDestructuringAssignment(node)) {
-                return ts.flattenDestructuringAssignment(node, visitor, context, 0 /* All */, needsDestructuringValue);
+                return ts.flattenDestructuringAssignment(node, visitor, context, 0, needsDestructuringValue);
             }
             return ts.visitEachChild(node, visitor, context);
         }
         function visitVariableStatement(node) {
-            var ancestorFacts = enterSubtree(0 /* None */, ts.hasModifier(node, 1 /* Export */) ? 32 /* ExportedVariableStatement */ : 0 /* None */);
+            var ancestorFacts = enterSubtree(0, ts.hasModifier(node, 1) ? 32 : 0);
             var updated;
-            if (convertedLoopState && (node.declarationList.flags & 3 /* BlockScoped */) === 0) {
-                // we are inside a converted loop - hoist variable declarations
+            if (convertedLoopState && (node.declarationList.flags & 3) === 0) {
                 var assignments = void 0;
                 for (var _i = 0, _a = node.declarationList.declarations; _i < _a.length; _i++) {
                     var decl = _a[_i];
@@ -67148,10 +55067,10 @@ var ts;
                     if (decl.initializer) {
                         var assignment = void 0;
                         if (ts.isBindingPattern(decl.name)) {
-                            assignment = ts.flattenDestructuringAssignment(decl, visitor, context, 0 /* All */);
+                            assignment = ts.flattenDestructuringAssignment(decl, visitor, context, 0);
                         }
                         else {
-                            assignment = ts.createBinary(decl.name, 58 /* EqualsToken */, ts.visitNode(decl.initializer, visitor, ts.isExpression));
+                            assignment = ts.createBinary(decl.name, 58, ts.visitNode(decl.initializer, visitor, ts.isExpression));
                             ts.setTextRange(assignment, decl);
                         }
                         assignments = ts.append(assignments, assignment);
@@ -67161,37 +55080,29 @@ var ts;
                     updated = ts.setTextRange(ts.createStatement(ts.inlineExpressions(assignments)), node);
                 }
                 else {
-                    // none of declarations has initializer - the entire variable statement can be deleted
                     updated = undefined;
                 }
             }
             else {
                 updated = ts.visitEachChild(node, visitor, context);
             }
-            exitSubtree(ancestorFacts, 0 /* None */, 0 /* None */);
+            exitSubtree(ancestorFacts, 0, 0);
             return updated;
         }
-        /**
-         * Visits a VariableDeclarationList that is block scoped (e.g. `let` or `const`).
-         *
-         * @param node A VariableDeclarationList node.
-         */
         function visitVariableDeclarationList(node) {
-            if (node.transformFlags & 64 /* ES2015 */) {
-                if (node.flags & 3 /* BlockScoped */) {
+            if (node.transformFlags & 64) {
+                if (node.flags & 3) {
                     enableSubstitutionsForBlockScopedBindings();
                 }
-                var declarations = ts.flatMap(node.declarations, node.flags & 1 /* Let */
+                var declarations = ts.flatMap(node.declarations, node.flags & 1
                     ? visitVariableDeclarationInLetDeclarationList
                     : visitVariableDeclaration);
                 var declarationList = ts.createVariableDeclarationList(declarations);
                 ts.setOriginalNode(declarationList, node);
                 ts.setTextRange(declarationList, node);
                 ts.setCommentRange(declarationList, node);
-                if (node.transformFlags & 8388608 /* ContainsBindingPattern */
+                if (node.transformFlags & 8388608
                     && (ts.isBindingPattern(node.declarations[0].name) || ts.isBindingPattern(ts.last(node.declarations).name))) {
-                    // If the first or last declaration is a binding pattern, we need to modify
-                    // the source map range for the declaration list.
                     var firstDeclaration = ts.firstOrUndefined(declarations);
                     if (firstDeclaration) {
                         ts.setSourceMapRange(declarationList, ts.createRange(firstDeclaration.pos, ts.last(declarations).end));
@@ -67201,76 +55112,23 @@ var ts;
             }
             return ts.visitEachChild(node, visitor, context);
         }
-        /**
-         * Gets a value indicating whether we should emit an explicit initializer for a variable
-         * declaration in a `let` declaration list.
-         *
-         * @param node A VariableDeclaration node.
-         */
         function shouldEmitExplicitInitializerForLetDeclaration(node) {
-            // Nested let bindings might need to be initialized explicitly to preserve
-            // ES6 semantic:
-            //
-            //  { let x = 1; }
-            //  { let x; } // x here should be undefined. not 1
-            //
-            // Top level bindings never collide with anything and thus don't require
-            // explicit initialization. As for nested let bindings there are two cases:
-            //
-            // - Nested let bindings that were not renamed definitely should be
-            //   initialized explicitly:
-            //
-            //    { let x = 1; }
-            //    { let x; if (some-condition) { x = 1}; if (x) { /*1*/ } }
-            //
-            //   Without explicit initialization code in /*1*/ can be executed even if
-            //   some-condition is evaluated to false.
-            //
-            // - Renaming introduces fresh name that should not collide with any
-            //   existing names, however renamed bindings sometimes also should be
-            //   explicitly initialized. One particular case: non-captured binding
-            //   declared inside loop body (but not in loop initializer):
-            //
-            //    let x;
-            //    for (;;) {
-            //        let x;
-            //    }
-            //
-            //   In downlevel codegen inner 'x' will be renamed so it won't collide
-            //   with outer 'x' however it will should be reset on every iteration as
-            //   if it was declared anew.
-            //
-            //   * Why non-captured binding?
-            //     - Because if loop contains block scoped binding captured in some
-            //       function then loop body will be rewritten to have a fresh scope
-            //       on every iteration so everything will just work.
-            //
-            //   * Why loop initializer is excluded?
-            //     - Since we've introduced a fresh name it already will be undefined.
             var flags = resolver.getNodeCheckFlags(node);
-            var isCapturedInFunction = flags & 131072 /* CapturedBlockScopedBinding */;
-            var isDeclaredInLoop = flags & 262144 /* BlockScopedBindingInLoop */;
-            var emittedAsTopLevel = (hierarchyFacts & 64 /* TopLevel */) !== 0
+            var isCapturedInFunction = flags & 131072;
+            var isDeclaredInLoop = flags & 262144;
+            var emittedAsTopLevel = (hierarchyFacts & 64) !== 0
                 || (isCapturedInFunction
                     && isDeclaredInLoop
-                    && (hierarchyFacts & 512 /* IterationStatementBlock */) !== 0);
+                    && (hierarchyFacts & 512) !== 0);
             var emitExplicitInitializer = !emittedAsTopLevel
-                && (hierarchyFacts & 2048 /* ForInOrForOfStatement */) === 0
+                && (hierarchyFacts & 2048) === 0
                 && (!resolver.isDeclarationWithCollidingName(node)
                     || (isDeclaredInLoop
                         && !isCapturedInFunction
-                        && (hierarchyFacts & (1024 /* ForStatement */ | 2048 /* ForInOrForOfStatement */)) === 0));
+                        && (hierarchyFacts & (1024 | 2048)) === 0));
             return emitExplicitInitializer;
         }
-        /**
-         * Visits a VariableDeclaration in a `let` declaration list.
-         *
-         * @param node A VariableDeclaration node.
-         */
         function visitVariableDeclarationInLetDeclarationList(node) {
-            // For binding pattern names that lack initializers there is no point to emit
-            // explicit initializer since downlevel codegen for destructuring will fail
-            // in the absence of initializer so all binding elements will say uninitialized
             var name = node.name;
             if (ts.isBindingPattern(name)) {
                 return visitVariableDeclaration(node);
@@ -67282,22 +55140,16 @@ var ts;
             }
             return ts.visitEachChild(node, visitor, context);
         }
-        /**
-         * Visits a VariableDeclaration node with a binding pattern.
-         *
-         * @param node A VariableDeclaration node.
-         */
         function visitVariableDeclaration(node) {
-            var ancestorFacts = enterSubtree(32 /* ExportedVariableStatement */, 0 /* None */);
+            var ancestorFacts = enterSubtree(32, 0);
             var updated;
             if (ts.isBindingPattern(node.name)) {
-                updated = ts.flattenDestructuringBinding(node, visitor, context, 0 /* All */, 
-                /*value*/ undefined, (ancestorFacts & 32 /* ExportedVariableStatement */) !== 0);
+                updated = ts.flattenDestructuringBinding(node, visitor, context, 0, undefined, (ancestorFacts & 32) !== 0);
             }
             else {
                 updated = ts.visitEachChild(node, visitor, context);
             }
-            exitSubtree(ancestorFacts, 0 /* None */, 0 /* None */);
+            exitSubtree(ancestorFacts, 0, 0);
             return updated;
         }
         function recordLabel(node) {
@@ -67311,78 +55163,67 @@ var ts;
                 convertedLoopState.labels = ts.createMap();
             }
             var statement = ts.unwrapInnermostStatementOfLabel(node, convertedLoopState && recordLabel);
-            return ts.isIterationStatement(statement, /*lookInLabeledStatements*/ false)
-                ? visitIterationStatement(statement, /*outermostLabeledStatement*/ node)
+            return ts.isIterationStatement(statement, false)
+                ? visitIterationStatement(statement, node)
                 : ts.restoreEnclosingLabel(ts.visitNode(statement, visitor, ts.isStatement), node, convertedLoopState && resetLabel);
         }
         function visitIterationStatement(node, outermostLabeledStatement) {
             switch (node.kind) {
-                case 218 /* DoStatement */:
-                case 219 /* WhileStatement */:
+                case 218:
+                case 219:
                     return visitDoOrWhileStatement(node, outermostLabeledStatement);
-                case 220 /* ForStatement */:
+                case 220:
                     return visitForStatement(node, outermostLabeledStatement);
-                case 221 /* ForInStatement */:
+                case 221:
                     return visitForInStatement(node, outermostLabeledStatement);
-                case 222 /* ForOfStatement */:
+                case 222:
                     return visitForOfStatement(node, outermostLabeledStatement);
             }
         }
         function visitIterationStatementWithFacts(excludeFacts, includeFacts, node, outermostLabeledStatement, convert) {
             var ancestorFacts = enterSubtree(excludeFacts, includeFacts);
             var updated = convertIterationStatementBodyIfNecessary(node, outermostLabeledStatement, convert);
-            exitSubtree(ancestorFacts, 0 /* None */, 0 /* None */);
+            exitSubtree(ancestorFacts, 0, 0);
             return updated;
         }
         function visitDoOrWhileStatement(node, outermostLabeledStatement) {
-            return visitIterationStatementWithFacts(0 /* DoOrWhileStatementExcludes */, 256 /* DoOrWhileStatementIncludes */, node, outermostLabeledStatement);
+            return visitIterationStatementWithFacts(0, 256, node, outermostLabeledStatement);
         }
         function visitForStatement(node, outermostLabeledStatement) {
-            return visitIterationStatementWithFacts(3008 /* ForStatementExcludes */, 1280 /* ForStatementIncludes */, node, outermostLabeledStatement);
+            return visitIterationStatementWithFacts(3008, 1280, node, outermostLabeledStatement);
         }
         function visitForInStatement(node, outermostLabeledStatement) {
-            return visitIterationStatementWithFacts(1984 /* ForInOrForOfStatementExcludes */, 2304 /* ForInOrForOfStatementIncludes */, node, outermostLabeledStatement);
+            return visitIterationStatementWithFacts(1984, 2304, node, outermostLabeledStatement);
         }
         function visitForOfStatement(node, outermostLabeledStatement) {
-            return visitIterationStatementWithFacts(1984 /* ForInOrForOfStatementExcludes */, 2304 /* ForInOrForOfStatementIncludes */, node, outermostLabeledStatement, compilerOptions.downlevelIteration ? convertForOfStatementForIterable : convertForOfStatementForArray);
+            return visitIterationStatementWithFacts(1984, 2304, node, outermostLabeledStatement, compilerOptions.downlevelIteration ? convertForOfStatementForIterable : convertForOfStatementForArray);
         }
         function convertForOfStatementHead(node, boundValue, convertedLoopBodyStatements) {
             var statements = [];
             var initializer = node.initializer;
             if (ts.isVariableDeclarationList(initializer)) {
-                if (node.initializer.flags & 3 /* BlockScoped */) {
+                if (node.initializer.flags & 3) {
                     enableSubstitutionsForBlockScopedBindings();
                 }
                 var firstOriginalDeclaration = ts.firstOrUndefined(initializer.declarations);
                 if (firstOriginalDeclaration && ts.isBindingPattern(firstOriginalDeclaration.name)) {
-                    // This works whether the declaration is a var, let, or const.
-                    // It will use rhsIterationValue _a[_i] as the initializer.
-                    var declarations = ts.flattenDestructuringBinding(firstOriginalDeclaration, visitor, context, 0 /* All */, boundValue);
+                    var declarations = ts.flattenDestructuringBinding(firstOriginalDeclaration, visitor, context, 0, boundValue);
                     var declarationList = ts.setTextRange(ts.createVariableDeclarationList(declarations), node.initializer);
                     ts.setOriginalNode(declarationList, node.initializer);
-                    // Adjust the source map range for the first declaration to align with the old
-                    // emitter.
                     ts.setSourceMapRange(declarationList, ts.createRange(declarations[0].pos, ts.last(declarations).end));
-                    statements.push(ts.createVariableStatement(
-                    /*modifiers*/ undefined, declarationList));
+                    statements.push(ts.createVariableStatement(undefined, declarationList));
                 }
                 else {
-                    // The following call does not include the initializer, so we have
-                    // to emit it separately.
-                    statements.push(ts.setTextRange(ts.createVariableStatement(
-                    /*modifiers*/ undefined, ts.setOriginalNode(ts.setTextRange(ts.createVariableDeclarationList([
-                        ts.createVariableDeclaration(firstOriginalDeclaration ? firstOriginalDeclaration.name : ts.createTempVariable(/*recordTempVariable*/ undefined), 
-                        /*type*/ undefined, boundValue)
+                    statements.push(ts.setTextRange(ts.createVariableStatement(undefined, ts.setOriginalNode(ts.setTextRange(ts.createVariableDeclarationList([
+                        ts.createVariableDeclaration(firstOriginalDeclaration ? firstOriginalDeclaration.name : ts.createTempVariable(undefined), undefined, boundValue)
                     ]), ts.moveRangePos(initializer, -1)), initializer)), ts.moveRangeEnd(initializer, -1)));
                 }
             }
             else {
-                // Initializer is an expression. Emit the expression in the body, so that it's
-                // evaluated on every iteration.
                 var assignment = ts.createAssignment(initializer, boundValue);
                 if (ts.isDestructuringAssignment(assignment)) {
                     ts.aggregateTransformFlags(assignment);
-                    statements.push(ts.createStatement(visitBinaryExpression(assignment, /*needsDestructuringValue*/ false)));
+                    statements.push(ts.createStatement(visitBinaryExpression(assignment, false)));
                 }
                 else {
                     assignment.end = initializer.end;
@@ -67404,111 +55245,62 @@ var ts;
             }
         }
         function createSyntheticBlockForConvertedStatements(statements) {
-            return ts.setEmitFlags(ts.createBlock(ts.createNodeArray(statements), 
-            /*multiLine*/ true), 48 /* NoSourceMap */ | 384 /* NoTokenSourceMaps */);
+            return ts.setEmitFlags(ts.createBlock(ts.createNodeArray(statements), true), 48 | 384);
         }
         function convertForOfStatementForArray(node, outermostLabeledStatement, convertedLoopBodyStatements) {
-            // The following ES6 code:
-            //
-            //    for (let v of expr) { }
-            //
-            // should be emitted as
-            //
-            //    for (var _i = 0, _a = expr; _i < _a.length; _i++) {
-            //        var v = _a[_i];
-            //    }
-            //
-            // where _a and _i are temps emitted to capture the RHS and the counter,
-            // respectively.
-            // When the left hand side is an expression instead of a let declaration,
-            // the "let v" is not emitted.
-            // When the left hand side is a let/const, the v is renamed if there is
-            // another v in scope.
-            // Note that all assignments to the LHS are emitted in the body, including
-            // all destructuring.
-            // Note also that because an extra statement is needed to assign to the LHS,
-            // for-of bodies are always emitted as blocks.
             var expression = ts.visitNode(node.expression, visitor, ts.isExpression);
-            // In the case where the user wrote an identifier as the RHS, like this:
-            //
-            //     for (let v of arr) { }
-            //
-            // we don't want to emit a temporary variable for the RHS, just use it directly.
             var counter = ts.createLoopVariable();
-            var rhsReference = ts.isIdentifier(expression) ? ts.getGeneratedNameForNode(expression) : ts.createTempVariable(/*recordTempVariable*/ undefined);
-            // The old emitter does not emit source maps for the expression
-            ts.setEmitFlags(expression, 48 /* NoSourceMap */ | ts.getEmitFlags(expression));
-            var forStatement = ts.setTextRange(ts.createFor(
-            /*initializer*/ ts.setEmitFlags(ts.setTextRange(ts.createVariableDeclarationList([
-                ts.setTextRange(ts.createVariableDeclaration(counter, /*type*/ undefined, ts.createLiteral(0)), ts.moveRangePos(node.expression, -1)),
-                ts.setTextRange(ts.createVariableDeclaration(rhsReference, /*type*/ undefined, expression), node.expression)
-            ]), node.expression), 2097152 /* NoHoisting */), 
-            /*condition*/ ts.setTextRange(ts.createLessThan(counter, ts.createPropertyAccess(rhsReference, "length")), node.expression), 
-            /*incrementor*/ ts.setTextRange(ts.createPostfixIncrement(counter), node.expression), 
-            /*statement*/ convertForOfStatementHead(node, ts.createElementAccess(rhsReference, counter), convertedLoopBodyStatements)), 
-            /*location*/ node);
-            // Disable trailing source maps for the OpenParenToken to align source map emit with the old emitter.
-            ts.setEmitFlags(forStatement, 256 /* NoTokenTrailingSourceMaps */);
+            var rhsReference = ts.isIdentifier(expression) ? ts.getGeneratedNameForNode(expression) : ts.createTempVariable(undefined);
+            ts.setEmitFlags(expression, 48 | ts.getEmitFlags(expression));
+            var forStatement = ts.setTextRange(ts.createFor(ts.setEmitFlags(ts.setTextRange(ts.createVariableDeclarationList([
+                ts.setTextRange(ts.createVariableDeclaration(counter, undefined, ts.createLiteral(0)), ts.moveRangePos(node.expression, -1)),
+                ts.setTextRange(ts.createVariableDeclaration(rhsReference, undefined, expression), node.expression)
+            ]), node.expression), 2097152), ts.setTextRange(ts.createLessThan(counter, ts.createPropertyAccess(rhsReference, "length")), node.expression), ts.setTextRange(ts.createPostfixIncrement(counter), node.expression), convertForOfStatementHead(node, ts.createElementAccess(rhsReference, counter), convertedLoopBodyStatements)), node);
+            ts.setEmitFlags(forStatement, 256);
             ts.setTextRange(forStatement, node);
             return ts.restoreEnclosingLabel(forStatement, outermostLabeledStatement, convertedLoopState && resetLabel);
         }
         function convertForOfStatementForIterable(node, outermostLabeledStatement, convertedLoopBodyStatements) {
             var expression = ts.visitNode(node.expression, visitor, ts.isExpression);
-            var iterator = ts.isIdentifier(expression) ? ts.getGeneratedNameForNode(expression) : ts.createTempVariable(/*recordTempVariable*/ undefined);
-            var result = ts.isIdentifier(expression) ? ts.getGeneratedNameForNode(iterator) : ts.createTempVariable(/*recordTempVariable*/ undefined);
+            var iterator = ts.isIdentifier(expression) ? ts.getGeneratedNameForNode(expression) : ts.createTempVariable(undefined);
+            var result = ts.isIdentifier(expression) ? ts.getGeneratedNameForNode(iterator) : ts.createTempVariable(undefined);
             var errorRecord = ts.createUniqueName("e");
             var catchVariable = ts.getGeneratedNameForNode(errorRecord);
-            var returnMethod = ts.createTempVariable(/*recordTempVariable*/ undefined);
+            var returnMethod = ts.createTempVariable(undefined);
             var values = ts.createValuesHelper(context, expression, node.expression);
-            var next = ts.createCall(ts.createPropertyAccess(iterator, "next"), /*typeArguments*/ undefined, []);
+            var next = ts.createCall(ts.createPropertyAccess(iterator, "next"), undefined, []);
             hoistVariableDeclaration(errorRecord);
             hoistVariableDeclaration(returnMethod);
-            var forStatement = ts.setEmitFlags(ts.setTextRange(ts.createFor(
-            /*initializer*/ ts.setEmitFlags(ts.setTextRange(ts.createVariableDeclarationList([
-                ts.setTextRange(ts.createVariableDeclaration(iterator, /*type*/ undefined, values), node.expression),
-                ts.createVariableDeclaration(result, /*type*/ undefined, next)
-            ]), node.expression), 2097152 /* NoHoisting */), 
-            /*condition*/ ts.createLogicalNot(ts.createPropertyAccess(result, "done")), 
-            /*incrementor*/ ts.createAssignment(result, next), 
-            /*statement*/ convertForOfStatementHead(node, ts.createPropertyAccess(result, "value"), convertedLoopBodyStatements)), 
-            /*location*/ node), 256 /* NoTokenTrailingSourceMaps */);
+            var forStatement = ts.setEmitFlags(ts.setTextRange(ts.createFor(ts.setEmitFlags(ts.setTextRange(ts.createVariableDeclarationList([
+                ts.setTextRange(ts.createVariableDeclaration(iterator, undefined, values), node.expression),
+                ts.createVariableDeclaration(result, undefined, next)
+            ]), node.expression), 2097152), ts.createLogicalNot(ts.createPropertyAccess(result, "done")), ts.createAssignment(result, next), convertForOfStatementHead(node, ts.createPropertyAccess(result, "value"), convertedLoopBodyStatements)), node), 256);
             return ts.createTry(ts.createBlock([
                 ts.restoreEnclosingLabel(forStatement, outermostLabeledStatement, convertedLoopState && resetLabel)
             ]), ts.createCatchClause(ts.createVariableDeclaration(catchVariable), ts.setEmitFlags(ts.createBlock([
                 ts.createStatement(ts.createAssignment(errorRecord, ts.createObjectLiteral([
                     ts.createPropertyAssignment("error", catchVariable)
                 ])))
-            ]), 1 /* SingleLine */)), ts.createBlock([
-                ts.createTry(
-                /*tryBlock*/ ts.createBlock([
-                    ts.setEmitFlags(ts.createIf(ts.createLogicalAnd(ts.createLogicalAnd(result, ts.createLogicalNot(ts.createPropertyAccess(result, "done"))), ts.createAssignment(returnMethod, ts.createPropertyAccess(iterator, "return"))), ts.createStatement(ts.createFunctionCall(returnMethod, iterator, []))), 1 /* SingleLine */),
-                ]), 
-                /*catchClause*/ undefined, 
-                /*finallyBlock*/ ts.setEmitFlags(ts.createBlock([
-                    ts.setEmitFlags(ts.createIf(errorRecord, ts.createThrow(ts.createPropertyAccess(errorRecord, "error"))), 1 /* SingleLine */)
-                ]), 1 /* SingleLine */))
+            ]), 1)), ts.createBlock([
+                ts.createTry(ts.createBlock([
+                    ts.setEmitFlags(ts.createIf(ts.createLogicalAnd(ts.createLogicalAnd(result, ts.createLogicalNot(ts.createPropertyAccess(result, "done"))), ts.createAssignment(returnMethod, ts.createPropertyAccess(iterator, "return"))), ts.createStatement(ts.createFunctionCall(returnMethod, iterator, []))), 1),
+                ]), undefined, ts.setEmitFlags(ts.createBlock([
+                    ts.setEmitFlags(ts.createIf(errorRecord, ts.createThrow(ts.createPropertyAccess(errorRecord, "error"))), 1)
+                ]), 1))
             ]));
         }
-        /**
-         * Visits an ObjectLiteralExpression with computed property names.
-         *
-         * @param node An ObjectLiteralExpression node.
-         */
         function visitObjectLiteralExpression(node) {
-            // We are here because a ComputedPropertyName was used somewhere in the expression.
             var properties = node.properties;
             var numProperties = properties.length;
-            // Find the first computed property.
-            // Everything until that point can be emitted as part of the initial object literal.
             var numInitialProperties = numProperties;
             var numInitialPropertiesWithoutYield = numProperties;
             for (var i = 0; i < numProperties; i++) {
                 var property = properties[i];
-                if ((property.transformFlags & 16777216 /* ContainsYield */ && hierarchyFacts & 4 /* AsyncFunctionBody */)
+                if ((property.transformFlags & 16777216 && hierarchyFacts & 4)
                     && i < numInitialPropertiesWithoutYield) {
                     numInitialPropertiesWithoutYield = i;
                 }
-                if (property.name.kind === 147 /* ComputedPropertyName */) {
+                if (property.name.kind === 147) {
                     numInitialProperties = i;
                     break;
                 }
@@ -67517,37 +55309,29 @@ var ts;
                 if (numInitialPropertiesWithoutYield < numInitialProperties) {
                     numInitialProperties = numInitialPropertiesWithoutYield;
                 }
-                // For computed properties, we need to create a unique handle to the object
-                // literal so we can modify it without risking internal assignments tainting the object.
                 var temp = ts.createTempVariable(hoistVariableDeclaration);
-                // Write out the first non-computed properties, then emit the rest through indexing on the temp variable.
                 var expressions = [];
-                var assignment = ts.createAssignment(temp, ts.setEmitFlags(ts.createObjectLiteral(ts.visitNodes(properties, visitor, ts.isObjectLiteralElementLike, 0, numInitialProperties), node.multiLine), 65536 /* Indented */));
+                var assignment = ts.createAssignment(temp, ts.setEmitFlags(ts.createObjectLiteral(ts.visitNodes(properties, visitor, ts.isObjectLiteralElementLike, 0, numInitialProperties), node.multiLine), 65536));
                 if (node.multiLine) {
                     ts.startOnNewLine(assignment);
                 }
                 expressions.push(assignment);
                 addObjectLiteralMembers(expressions, node, temp, numInitialProperties);
-                // We need to clone the temporary identifier so that we can write it on a
-                // new line
                 expressions.push(node.multiLine ? ts.startOnNewLine(ts.getMutableClone(temp)) : temp);
                 return ts.inlineExpressions(expressions);
             }
             return ts.visitEachChild(node, visitor, context);
         }
         function shouldConvertIterationStatementBody(node) {
-            return (resolver.getNodeCheckFlags(node) & 65536 /* LoopWithCapturedBlockScopedBinding */) !== 0;
+            return (resolver.getNodeCheckFlags(node) & 65536) !== 0;
         }
-        /**
-         * Records constituents of name for the given variable to be hoisted in the outer scope.
-         */
         function hoistVariableDeclarationDeclaredInConvertedLoop(state, node) {
             if (!state.hoistedLocalVariables) {
                 state.hoistedLocalVariables = [];
             }
             visit(node.name);
             function visit(node) {
-                if (node.kind === 71 /* Identifier */) {
+                if (node.kind === 71) {
                     state.hoistedLocalVariables.push(node);
                 }
                 else {
@@ -67564,13 +55348,11 @@ var ts;
             if (!shouldConvertIterationStatementBody(node)) {
                 var saveAllowedNonLabeledJumps = void 0;
                 if (convertedLoopState) {
-                    // we get here if we are trying to emit normal loop loop inside converted loop
-                    // set allowedNonLabeledJumps to Break | Continue to mark that break\continue inside the loop should be emitted as is
                     saveAllowedNonLabeledJumps = convertedLoopState.allowedNonLabeledJumps;
-                    convertedLoopState.allowedNonLabeledJumps = 2 /* Break */ | 4 /* Continue */;
+                    convertedLoopState.allowedNonLabeledJumps = 2 | 4;
                 }
                 var result = convert
-                    ? convert(node, outermostLabeledStatement, /*convertedLoopBodyStatements*/ undefined)
+                    ? convert(node, outermostLabeledStatement, undefined)
                     : ts.restoreEnclosingLabel(ts.visitEachChild(node, visitor, context), outermostLabeledStatement, convertedLoopState && resetLabel);
                 if (convertedLoopState) {
                     convertedLoopState.allowedNonLabeledJumps = saveAllowedNonLabeledJumps;
@@ -67580,20 +55362,18 @@ var ts;
             var functionName = ts.createUniqueName("_loop");
             var loopInitializer;
             switch (node.kind) {
-                case 220 /* ForStatement */:
-                case 221 /* ForInStatement */:
-                case 222 /* ForOfStatement */:
+                case 220:
+                case 221:
+                case 222:
                     var initializer = node.initializer;
-                    if (initializer && initializer.kind === 233 /* VariableDeclarationList */) {
+                    if (initializer && initializer.kind === 233) {
                         loopInitializer = initializer;
                     }
                     break;
             }
-            // variables that will be passed to the loop as parameters
             var loopParameters = [];
-            // variables declared in the loop initializer that will be changed inside the loop
             var loopOutParameters = [];
-            if (loopInitializer && (ts.getCombinedNodeFlags(loopInitializer) & 3 /* BlockScoped */)) {
+            if (loopInitializer && (ts.getCombinedNodeFlags(loopInitializer) & 3)) {
                 for (var _i = 0, _a = loopInitializer.declarations; _i < _a.length; _i++) {
                     var decl = _a[_i];
                     processLoopVariableDeclaration(decl, loopParameters, loopOutParameters);
@@ -67602,21 +55382,13 @@ var ts;
             var outerConvertedLoopState = convertedLoopState;
             convertedLoopState = { loopOutParameters: loopOutParameters };
             if (outerConvertedLoopState) {
-                // convertedOuterLoopState !== undefined means that this converted loop is nested in another converted loop.
-                // if outer converted loop has already accumulated some state - pass it through
                 if (outerConvertedLoopState.argumentsName) {
-                    // outer loop has already used 'arguments' so we've already have some name to alias it
-                    // use the same name in all nested loops
                     convertedLoopState.argumentsName = outerConvertedLoopState.argumentsName;
                 }
                 if (outerConvertedLoopState.thisName) {
-                    // outer loop has already used 'this' so we've already have some name to alias it
-                    // use the same name in all nested loops
                     convertedLoopState.thisName = outerConvertedLoopState.thisName;
                 }
                 if (outerConvertedLoopState.hoistedLocalVariables) {
-                    // we've already collected some non-block scoped variable declarations in enclosing loop
-                    // use the same storage in nested loop
                     convertedLoopState.hoistedLocalVariables = outerConvertedLoopState.hoistedLocalVariables;
                 }
             }
@@ -67628,83 +55400,61 @@ var ts;
             if (loopOutParameters.length || lexicalEnvironment) {
                 var statements_4 = ts.isBlock(loopBody) ? loopBody.statements.slice() : [loopBody];
                 if (loopOutParameters.length) {
-                    copyOutParameters(loopOutParameters, 1 /* ToOutParameter */, statements_4);
+                    copyOutParameters(loopOutParameters, 1, statements_4);
                 }
                 ts.prependStatements(statements_4, lexicalEnvironment);
-                loopBody = ts.createBlock(statements_4, /*multiline*/ true);
+                loopBody = ts.createBlock(statements_4, true);
             }
             if (ts.isBlock(loopBody)) {
                 loopBody.multiLine = true;
             }
             else {
-                loopBody = ts.createBlock([loopBody], /*multiline*/ true);
+                loopBody = ts.createBlock([loopBody], true);
             }
-            var containsYield = (node.statement.transformFlags & 16777216 /* ContainsYield */) !== 0;
-            var isAsyncBlockContainingAwait = containsYield && (hierarchyFacts & 4 /* AsyncFunctionBody */) !== 0;
+            var containsYield = (node.statement.transformFlags & 16777216) !== 0;
+            var isAsyncBlockContainingAwait = containsYield && (hierarchyFacts & 4) !== 0;
             var loopBodyFlags = 0;
             if (currentState.containsLexicalThis) {
-                loopBodyFlags |= 8 /* CapturesThis */;
+                loopBodyFlags |= 8;
             }
             if (isAsyncBlockContainingAwait) {
-                loopBodyFlags |= 262144 /* AsyncFunctionBody */;
-            }
-            var convertedLoopVariable = ts.createVariableStatement(
-            /*modifiers*/ undefined, ts.setEmitFlags(ts.createVariableDeclarationList([
-                ts.createVariableDeclaration(functionName, 
-                /*type*/ undefined, ts.setEmitFlags(ts.createFunctionExpression(
-                /*modifiers*/ undefined, containsYield ? ts.createToken(39 /* AsteriskToken */) : undefined, 
-                /*name*/ undefined, 
-                /*typeParameters*/ undefined, loopParameters, 
-                /*type*/ undefined, loopBody), loopBodyFlags))
-            ]), 2097152 /* NoHoisting */));
+                loopBodyFlags |= 262144;
+            }
+            var convertedLoopVariable = ts.createVariableStatement(undefined, ts.setEmitFlags(ts.createVariableDeclarationList([
+                ts.createVariableDeclaration(functionName, undefined, ts.setEmitFlags(ts.createFunctionExpression(undefined, containsYield ? ts.createToken(39) : undefined, undefined, undefined, loopParameters, undefined, loopBody), loopBodyFlags))
+            ]), 2097152));
             var statements = [convertedLoopVariable];
             var extraVariableDeclarations;
-            // propagate state from the inner loop to the outer loop if necessary
             if (currentState.argumentsName) {
-                // if alias for arguments is set
                 if (outerConvertedLoopState) {
-                    // pass it to outer converted loop
                     outerConvertedLoopState.argumentsName = currentState.argumentsName;
                 }
                 else {
-                    // this is top level converted loop and we need to create an alias for 'arguments' object
-                    (extraVariableDeclarations || (extraVariableDeclarations = [])).push(ts.createVariableDeclaration(currentState.argumentsName, 
-                    /*type*/ undefined, ts.createIdentifier("arguments")));
+                    (extraVariableDeclarations || (extraVariableDeclarations = [])).push(ts.createVariableDeclaration(currentState.argumentsName, undefined, ts.createIdentifier("arguments")));
                 }
             }
             if (currentState.thisName) {
-                // if alias for this is set
                 if (outerConvertedLoopState) {
-                    // pass it to outer converted loop
                     outerConvertedLoopState.thisName = currentState.thisName;
                 }
                 else {
-                    // this is top level converted loop so we need to create an alias for 'this' here
-                    // NOTE:
-                    // if converted loops were all nested in arrow function then we'll always emit '_this' so convertedLoopState.thisName will not be set.
-                    // If it is set this means that all nested loops are not nested in arrow function and it is safe to capture 'this'.
-                    (extraVariableDeclarations || (extraVariableDeclarations = [])).push(ts.createVariableDeclaration(currentState.thisName, 
-                    /*type*/ undefined, ts.createIdentifier("this")));
+                    (extraVariableDeclarations || (extraVariableDeclarations = [])).push(ts.createVariableDeclaration(currentState.thisName, undefined, ts.createIdentifier("this")));
                 }
             }
             if (currentState.hoistedLocalVariables) {
-                // if hoistedLocalVariables !== undefined this means that we've possibly collected some variable declarations to be hoisted later
                 if (outerConvertedLoopState) {
-                    // pass them to outer converted loop
                     outerConvertedLoopState.hoistedLocalVariables = currentState.hoistedLocalVariables;
                 }
                 else {
                     if (!extraVariableDeclarations) {
                         extraVariableDeclarations = [];
                     }
-                    // hoist collected variable declarations
                     for (var _b = 0, _c = currentState.hoistedLocalVariables; _b < _c.length; _b++) {
                         var identifier = _c[_b];
                         extraVariableDeclarations.push(ts.createVariableDeclaration(identifier));
                     }
                 }
             }
-            // add extra variables to hold out parameters if necessary
             if (loopOutParameters.length) {
                 if (!extraVariableDeclarations) {
                     extraVariableDeclarations = [];
@@ -67714,10 +55464,8 @@ var ts;
                     extraVariableDeclarations.push(ts.createVariableDeclaration(outParam.outParamName));
                 }
             }
-            // create variable statement to hold all introduced variable declarations
             if (extraVariableDeclarations) {
-                statements.push(ts.createVariableStatement(
-                /*modifiers*/ undefined, ts.createVariableDeclarationList(extraVariableDeclarations)));
+                statements.push(ts.createVariableStatement(undefined, ts.createVariableDeclarationList(extraVariableDeclarations)));
             }
             var convertedLoopBodyStatements = generateCallToConvertedLoop(functionName, loopParameters, currentState, containsYield);
             var loop;
@@ -67726,13 +55474,9 @@ var ts;
             }
             else {
                 var clone_3 = ts.getMutableClone(node);
-                // clean statement part
                 clone_3.statement = undefined;
-                // visit childnodes to transform initializer/condition/incrementor parts
                 clone_3 = ts.visitEachChild(clone_3, visitor, context);
-                // set loop statement
-                clone_3.statement = ts.createBlock(convertedLoopBodyStatements, /*multiline*/ true);
-                // reset and re-aggregate the transform flags
+                clone_3.statement = ts.createBlock(convertedLoopBodyStatements, true);
                 clone_3.transformFlags = 0;
                 ts.aggregateTransformFlags(clone_3);
                 loop = ts.restoreEnclosingLabel(clone_3, outermostLabeledStatement, convertedLoopState && resetLabel);
@@ -67741,9 +55485,9 @@ var ts;
             return statements;
         }
         function copyOutParameter(outParam, copyDirection) {
-            var source = copyDirection === 0 /* ToOriginal */ ? outParam.outParamName : outParam.originalName;
-            var target = copyDirection === 0 /* ToOriginal */ ? outParam.originalName : outParam.outParamName;
-            return ts.createBinary(target, 58 /* EqualsToken */, source);
+            var source = copyDirection === 0 ? outParam.outParamName : outParam.originalName;
+            var target = copyDirection === 0 ? outParam.originalName : outParam.outParamName;
+            return ts.createBinary(target, 58, source);
         }
         function copyOutParameters(outParams, copyDirection, statements) {
             for (var _i = 0, outParams_1 = outParams; _i < outParams_1.length; _i++) {
@@ -67754,44 +55498,40 @@ var ts;
         function generateCallToConvertedLoop(loopFunctionExpressionName, parameters, state, isAsyncBlockContainingAwait) {
             var outerConvertedLoopState = convertedLoopState;
             var statements = [];
-            // loop is considered simple if it does not have any return statements or break\continue that transfer control outside of the loop
-            // simple loops are emitted as just 'loop()';
-            // NOTE: if loop uses only 'continue' it still will be emitted as simple loop
-            var isSimpleLoop = !(state.nonLocalJumps & ~4 /* Continue */) &&
+            var isSimpleLoop = !(state.nonLocalJumps & ~4) &&
                 !state.labeledNonLocalBreaks &&
                 !state.labeledNonLocalContinues;
-            var call = ts.createCall(loopFunctionExpressionName, /*typeArguments*/ undefined, ts.map(parameters, function (p) { return p.name; }));
+            var call = ts.createCall(loopFunctionExpressionName, undefined, ts.map(parameters, function (p) { return p.name; }));
             var callResult = isAsyncBlockContainingAwait
-                ? ts.createYield(ts.createToken(39 /* AsteriskToken */), ts.setEmitFlags(call, 8388608 /* Iterator */))
+                ? ts.createYield(ts.createToken(39), ts.setEmitFlags(call, 8388608))
                 : call;
             if (isSimpleLoop) {
                 statements.push(ts.createStatement(callResult));
-                copyOutParameters(state.loopOutParameters, 0 /* ToOriginal */, statements);
+                copyOutParameters(state.loopOutParameters, 0, statements);
             }
             else {
                 var loopResultName = ts.createUniqueName("state");
-                var stateVariable = ts.createVariableStatement(
-                /*modifiers*/ undefined, ts.createVariableDeclarationList([ts.createVariableDeclaration(loopResultName, /*type*/ undefined, callResult)]));
+                var stateVariable = ts.createVariableStatement(undefined, ts.createVariableDeclarationList([ts.createVariableDeclaration(loopResultName, undefined, callResult)]));
                 statements.push(stateVariable);
-                copyOutParameters(state.loopOutParameters, 0 /* ToOriginal */, statements);
-                if (state.nonLocalJumps & 8 /* Return */) {
+                copyOutParameters(state.loopOutParameters, 0, statements);
+                if (state.nonLocalJumps & 8) {
                     var returnStatement = void 0;
                     if (outerConvertedLoopState) {
-                        outerConvertedLoopState.nonLocalJumps |= 8 /* Return */;
+                        outerConvertedLoopState.nonLocalJumps |= 8;
                         returnStatement = ts.createReturn(loopResultName);
                     }
                     else {
                         returnStatement = ts.createReturn(ts.createPropertyAccess(loopResultName, "value"));
                     }
-                    statements.push(ts.createIf(ts.createBinary(ts.createTypeOf(loopResultName), 34 /* EqualsEqualsEqualsToken */, ts.createLiteral("object")), returnStatement));
+                    statements.push(ts.createIf(ts.createBinary(ts.createTypeOf(loopResultName), 34, ts.createLiteral("object")), returnStatement));
                 }
-                if (state.nonLocalJumps & 2 /* Break */) {
-                    statements.push(ts.createIf(ts.createBinary(loopResultName, 34 /* EqualsEqualsEqualsToken */, ts.createLiteral("break")), ts.createBreak()));
+                if (state.nonLocalJumps & 2) {
+                    statements.push(ts.createIf(ts.createBinary(loopResultName, 34, ts.createLiteral("break")), ts.createBreak()));
                 }
                 if (state.labeledNonLocalBreaks || state.labeledNonLocalContinues) {
                     var caseClauses = [];
-                    processLabeledJumps(state.labeledNonLocalBreaks, /*isBreak*/ true, loopResultName, outerConvertedLoopState, caseClauses);
-                    processLabeledJumps(state.labeledNonLocalContinues, /*isBreak*/ false, loopResultName, outerConvertedLoopState, caseClauses);
+                    processLabeledJumps(state.labeledNonLocalBreaks, true, loopResultName, outerConvertedLoopState, caseClauses);
+                    processLabeledJumps(state.labeledNonLocalContinues, false, loopResultName, outerConvertedLoopState, caseClauses);
                     statements.push(ts.createSwitch(loopResultName, ts.createCaseBlock(caseClauses)));
                 }
             }
@@ -67817,9 +55557,6 @@ var ts;
             }
             table.forEach(function (labelMarker, labelText) {
                 var statements = [];
-                // if there are no outer converted loop or outer label in question is located inside outer converted loop
-                // then emit labeled break\continue
-                // otherwise propagate pair 'label -> marker' to outer converted loop and emit 'return labelMarker' so outer loop can later decide what to do
                 if (!outerLoop || (outerLoop.labels && outerLoop.labels.get(labelText))) {
                     var label = ts.createIdentifier(labelText);
                     statements.push(isBreak ? ts.createBreak(label) : ts.createContinue(label));
@@ -67842,42 +55579,33 @@ var ts;
                 }
             }
             else {
-                loopParameters.push(ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, name));
-                if (resolver.getNodeCheckFlags(decl) & 2097152 /* NeedsLoopOutParameter */) {
+                loopParameters.push(ts.createParameter(undefined, undefined, undefined, name));
+                if (resolver.getNodeCheckFlags(decl) & 2097152) {
                     var outParamName = ts.createUniqueName("out_" + ts.idText(name));
                     loopOutParameters.push({ originalName: name, outParamName: outParamName });
                 }
             }
         }
-        /**
-         * Adds the members of an object literal to an array of expressions.
-         *
-         * @param expressions An array of expressions.
-         * @param node An ObjectLiteralExpression node.
-         * @param receiver The receiver for members of the ObjectLiteralExpression.
-         * @param numInitialNonComputedProperties The number of initial properties without
-         *                                        computed property names.
-         */
         function addObjectLiteralMembers(expressions, node, receiver, start) {
             var properties = node.properties;
             var numProperties = properties.length;
             for (var i = start; i < numProperties; i++) {
                 var property = properties[i];
                 switch (property.kind) {
-                    case 156 /* GetAccessor */:
-                    case 157 /* SetAccessor */:
+                    case 156:
+                    case 157:
                         var accessors = ts.getAllAccessorDeclarations(node.properties, property);
                         if (property === accessors.firstAccessor) {
                             expressions.push(transformAccessorsToExpression(receiver, accessors, node, !!node.multiLine));
                         }
                         break;
-                    case 154 /* MethodDeclaration */:
+                    case 154:
                         expressions.push(transformObjectLiteralMethodDeclarationToExpression(property, receiver, node, node.multiLine));
                         break;
-                    case 270 /* PropertyAssignment */:
+                    case 270:
                         expressions.push(transformPropertyAssignmentToExpression(property, receiver, node.multiLine));
                         break;
-                    case 271 /* ShorthandPropertyAssignment */:
+                    case 271:
                         expressions.push(transformShorthandPropertyAssignmentToExpression(property, receiver, node.multiLine));
                         break;
                     default:
@@ -67886,13 +55614,6 @@ var ts;
                 }
             }
         }
-        /**
-         * Transforms a PropertyAssignment node into an expression.
-         *
-         * @param node The ObjectLiteralExpression that contains the PropertyAssignment.
-         * @param property The PropertyAssignment node.
-         * @param receiver The receiver for the assignment.
-         */
         function transformPropertyAssignmentToExpression(property, receiver, startsOnNewLine) {
             var expression = ts.createAssignment(ts.createMemberAccessForPropertyName(receiver, ts.visitNode(property.name, visitor, ts.isPropertyName)), ts.visitNode(property.initializer, visitor, ts.isExpression));
             ts.setTextRange(expression, property);
@@ -67901,13 +55622,6 @@ var ts;
             }
             return expression;
         }
-        /**
-         * Transforms a ShorthandPropertyAssignment node into an expression.
-         *
-         * @param node The ObjectLiteralExpression that contains the ShorthandPropertyAssignment.
-         * @param property The ShorthandPropertyAssignment node.
-         * @param receiver The receiver for the assignment.
-         */
         function transformShorthandPropertyAssignmentToExpression(property, receiver, startsOnNewLine) {
             var expression = ts.createAssignment(ts.createMemberAccessForPropertyName(receiver, ts.visitNode(property.name, visitor, ts.isPropertyName)), ts.getSynthesizedClone(property.name));
             ts.setTextRange(expression, property);
@@ -67916,201 +55630,103 @@ var ts;
             }
             return expression;
         }
-        /**
-         * Transforms a MethodDeclaration of an ObjectLiteralExpression into an expression.
-         *
-         * @param node The ObjectLiteralExpression that contains the MethodDeclaration.
-         * @param method The MethodDeclaration node.
-         * @param receiver The receiver for the assignment.
-         */
         function transformObjectLiteralMethodDeclarationToExpression(method, receiver, container, startsOnNewLine) {
-            var ancestorFacts = enterSubtree(0 /* None */, 0 /* None */);
-            var expression = ts.createAssignment(ts.createMemberAccessForPropertyName(receiver, ts.visitNode(method.name, visitor, ts.isPropertyName)), transformFunctionLikeToExpression(method, /*location*/ method, /*name*/ undefined, container));
+            var ancestorFacts = enterSubtree(0, 0);
+            var expression = ts.createAssignment(ts.createMemberAccessForPropertyName(receiver, ts.visitNode(method.name, visitor, ts.isPropertyName)), transformFunctionLikeToExpression(method, method, undefined, container));
             ts.setTextRange(expression, method);
             if (startsOnNewLine) {
                 ts.startOnNewLine(expression);
             }
-            exitSubtree(ancestorFacts, 49152 /* PropagateNewTargetMask */, hierarchyFacts & 49152 /* PropagateNewTargetMask */ ? 16384 /* NewTarget */ : 0 /* None */);
+            exitSubtree(ancestorFacts, 49152, hierarchyFacts & 49152 ? 16384 : 0);
             return expression;
         }
         function visitCatchClause(node) {
-            var ancestorFacts = enterSubtree(4032 /* BlockScopeExcludes */, 0 /* BlockScopeIncludes */);
+            var ancestorFacts = enterSubtree(4032, 0);
             var updated;
             ts.Debug.assert(!!node.variableDeclaration, "Catch clause variable should always be present when downleveling ES2015.");
             if (ts.isBindingPattern(node.variableDeclaration.name)) {
-                var temp = ts.createTempVariable(/*recordTempVariable*/ undefined);
+                var temp = ts.createTempVariable(undefined);
                 var newVariableDeclaration = ts.createVariableDeclaration(temp);
                 ts.setTextRange(newVariableDeclaration, node.variableDeclaration);
-                var vars = ts.flattenDestructuringBinding(node.variableDeclaration, visitor, context, 0 /* All */, temp);
+                var vars = ts.flattenDestructuringBinding(node.variableDeclaration, visitor, context, 0, temp);
                 var list = ts.createVariableDeclarationList(vars);
                 ts.setTextRange(list, node.variableDeclaration);
-                var destructure = ts.createVariableStatement(/*modifiers*/ undefined, list);
+                var destructure = ts.createVariableStatement(undefined, list);
                 updated = ts.updateCatchClause(node, newVariableDeclaration, addStatementToStartOfBlock(node.block, destructure));
             }
             else {
                 updated = ts.visitEachChild(node, visitor, context);
             }
-            exitSubtree(ancestorFacts, 0 /* None */, 0 /* None */);
+            exitSubtree(ancestorFacts, 0, 0);
             return updated;
         }
         function addStatementToStartOfBlock(block, statement) {
             var transformedStatements = ts.visitNodes(block.statements, visitor, ts.isStatement);
             return ts.updateBlock(block, [statement].concat(transformedStatements));
         }
-        /**
-         * Visits a MethodDeclaration of an ObjectLiteralExpression and transforms it into a
-         * PropertyAssignment.
-         *
-         * @param node A MethodDeclaration node.
-         */
         function visitMethodDeclaration(node) {
-            // We should only get here for methods on an object literal with regular identifier names.
-            // Methods on classes are handled in visitClassDeclaration/visitClassExpression.
-            // Methods with computed property names are handled in visitObjectLiteralExpression.
             ts.Debug.assert(!ts.isComputedPropertyName(node.name));
-            var functionExpression = transformFunctionLikeToExpression(node, /*location*/ ts.moveRangePos(node, -1), /*name*/ undefined, /*container*/ undefined);
-            ts.setEmitFlags(functionExpression, 512 /* NoLeadingComments */ | ts.getEmitFlags(functionExpression));
-            return ts.setTextRange(ts.createPropertyAssignment(node.name, functionExpression), 
-            /*location*/ node);
-        }
-        /**
-         * Visits an AccessorDeclaration of an ObjectLiteralExpression.
-         *
-         * @param node An AccessorDeclaration node.
-         */
+            var functionExpression = transformFunctionLikeToExpression(node, ts.moveRangePos(node, -1), undefined, undefined);
+            ts.setEmitFlags(functionExpression, 512 | ts.getEmitFlags(functionExpression));
+            return ts.setTextRange(ts.createPropertyAssignment(node.name, functionExpression), node);
+        }
         function visitAccessorDeclaration(node) {
             ts.Debug.assert(!ts.isComputedPropertyName(node.name));
             var savedConvertedLoopState = convertedLoopState;
             convertedLoopState = undefined;
-            var ancestorFacts = enterSubtree(16286 /* FunctionExcludes */, 65 /* FunctionIncludes */);
+            var ancestorFacts = enterSubtree(16286, 65);
             var updated;
             var parameters = ts.visitParameterList(node.parameters, visitor, context);
-            var body = node.transformFlags & (32768 /* ContainsCapturedLexicalThis */ | 128 /* ContainsES2015 */)
+            var body = node.transformFlags & (32768 | 128)
                 ? transformFunctionBody(node)
                 : visitFunctionBodyDownLevel(node);
-            if (node.kind === 156 /* GetAccessor */) {
+            if (node.kind === 156) {
                 updated = ts.updateGetAccessor(node, node.decorators, node.modifiers, node.name, parameters, node.type, body);
             }
             else {
                 updated = ts.updateSetAccessor(node, node.decorators, node.modifiers, node.name, parameters, body);
             }
-            exitSubtree(ancestorFacts, 49152 /* PropagateNewTargetMask */, 0 /* None */);
+            exitSubtree(ancestorFacts, 49152, 0);
             convertedLoopState = savedConvertedLoopState;
             return updated;
         }
-        /**
-         * Visits a ShorthandPropertyAssignment and transforms it into a PropertyAssignment.
-         *
-         * @param node A ShorthandPropertyAssignment node.
-         */
         function visitShorthandPropertyAssignment(node) {
-            return ts.setTextRange(ts.createPropertyAssignment(node.name, ts.getSynthesizedClone(node.name)), 
-            /*location*/ node);
+            return ts.setTextRange(ts.createPropertyAssignment(node.name, ts.getSynthesizedClone(node.name)), node);
         }
         function visitComputedPropertyName(node) {
-            var ancestorFacts = enterSubtree(0 /* ComputedPropertyNameExcludes */, 8192 /* ComputedPropertyNameIncludes */);
+            var ancestorFacts = enterSubtree(0, 8192);
             var updated = ts.visitEachChild(node, visitor, context);
-            exitSubtree(ancestorFacts, 49152 /* PropagateNewTargetMask */, hierarchyFacts & 49152 /* PropagateNewTargetMask */ ? 32768 /* NewTargetInComputedPropertyName */ : 0 /* None */);
+            exitSubtree(ancestorFacts, 49152, hierarchyFacts & 49152 ? 32768 : 0);
             return updated;
         }
-        /**
-         * Visits a YieldExpression node.
-         *
-         * @param node A YieldExpression node.
-         */
         function visitYieldExpression(node) {
-            // `yield` expressions are transformed using the generators transformer.
             return ts.visitEachChild(node, visitor, context);
         }
-        /**
-         * Visits an ArrayLiteralExpression that contains a spread element.
-         *
-         * @param node An ArrayLiteralExpression node.
-         */
         function visitArrayLiteralExpression(node) {
-            if (node.transformFlags & 64 /* ES2015 */) {
-                // We are here because we contain a SpreadElementExpression.
-                return transformAndSpreadElements(node.elements, /*needsUniqueCopy*/ true, !!node.multiLine, /*hasTrailingComma*/ !!node.elements.hasTrailingComma);
+            if (node.transformFlags & 64) {
+                return transformAndSpreadElements(node.elements, true, !!node.multiLine, !!node.elements.hasTrailingComma);
             }
             return ts.visitEachChild(node, visitor, context);
         }
-        /**
-         * Visits a CallExpression that contains either a spread element or `super`.
-         *
-         * @param node a CallExpression.
-         */
         function visitCallExpression(node) {
-            if (ts.getEmitFlags(node) & 33554432 /* TypeScriptClassWrapper */) {
+            if (ts.getEmitFlags(node) & 33554432) {
                 return visitTypeScriptClassWrapper(node);
             }
-            if (node.transformFlags & 64 /* ES2015 */) {
-                return visitCallExpressionWithPotentialCapturedThisAssignment(node, /*assignToCapturedThis*/ true);
+            if (node.transformFlags & 64) {
+                return visitCallExpressionWithPotentialCapturedThisAssignment(node, true);
             }
-            return ts.updateCall(node, ts.visitNode(node.expression, callExpressionVisitor, ts.isExpression), 
-            /*typeArguments*/ undefined, ts.visitNodes(node.arguments, visitor, ts.isExpression));
+            return ts.updateCall(node, ts.visitNode(node.expression, callExpressionVisitor, ts.isExpression), undefined, ts.visitNodes(node.arguments, visitor, ts.isExpression));
         }
         function visitTypeScriptClassWrapper(node) {
-            // This is a call to a class wrapper function (an IIFE) created by the 'ts' transformer.
-            // The wrapper has a form similar to:
-            //
-            //  (function() {
-            //      class C { // 1
-            //      }
-            //      C.x = 1; // 2
-            //      return C;
-            //  }())
-            //
-            // When we transform the class, we end up with something like this:
-            //
-            //  (function () {
-            //      var C = (function () { // 3
-            //          function C() {
-            //          }
-            //          return C; // 4
-            //      }());
-            //      C.x = 1;
-            //      return C;
-            //  }())
-            //
-            // We want to simplify the two nested IIFEs to end up with something like this:
-            //
-            //  (function () {
-            //      function C() {
-            //      }
-            //      C.x = 1;
-            //      return C;
-            //  }())
-            // We skip any outer expressions in a number of places to get to the innermost
-            // expression, but we will restore them later to preserve comments and source maps.
             var body = ts.cast(ts.cast(ts.skipOuterExpressions(node.expression), ts.isArrowFunction).body, ts.isBlock);
-            // The class statements are the statements generated by visiting the first statement with initializer of the
-            // body (1), while all other statements are added to remainingStatements (2)
             var isVariableStatementWithInitializer = function (stmt) { return ts.isVariableStatement(stmt) && !!ts.first(stmt.declarationList.declarations).initializer; };
             var bodyStatements = ts.visitNodes(body.statements, visitor, ts.isStatement);
             var classStatements = ts.filter(bodyStatements, isVariableStatementWithInitializer);
             var remainingStatements = ts.filter(bodyStatements, function (stmt) { return !isVariableStatementWithInitializer(stmt); });
             var varStatement = ts.cast(ts.first(classStatements), ts.isVariableStatement);
-            // We know there is only one variable declaration here as we verified this in an
-            // earlier call to isTypeScriptClassWrapper
             var variable = varStatement.declarationList.declarations[0];
             var initializer = ts.skipOuterExpressions(variable.initializer);
-            // Under certain conditions, the 'ts' transformer may introduce a class alias, which
-            // we see as an assignment, for example:
-            //
-            //  (function () {
-            //      var C_1;
-            //      var C = C_1 = (function () {
-            //          function C() {
-            //          }
-            //          C.x = function () { return C_1; }
-            //          return C;
-            //      }());
-            //      C = C_1 = __decorate([dec], C);
-            //      return C;
-            //  }())
-            //
             var aliasAssignment = ts.tryCast(initializer, ts.isAssignmentExpression);
-            // The underlying call (3) is another IIFE that may contain a '_super' argument.
             var call = ts.cast(aliasAssignment ? ts.skipOuterExpressions(aliasAssignment.right) : initializer, ts.isCallExpression);
             var func = ts.cast(ts.skipOuterExpressions(call.expression), ts.isFunctionExpression);
             var funcStatements = func.body.statements;
@@ -68118,92 +55734,47 @@ var ts;
             var classBodyEnd = -1;
             var statements = [];
             if (aliasAssignment) {
-                // If we have a class alias assignment, we need to move it to the down-level constructor
-                // function we generated for the class.
                 var extendsCall = ts.tryCast(funcStatements[classBodyStart], ts.isExpressionStatement);
                 if (extendsCall) {
                     statements.push(extendsCall);
                     classBodyStart++;
                 }
-                // The next statement is the function declaration.
                 statements.push(funcStatements[classBodyStart]);
                 classBodyStart++;
-                // Add the class alias following the declaration.
                 statements.push(ts.createStatement(ts.createAssignment(aliasAssignment.left, ts.cast(variable.name, ts.isIdentifier))));
             }
-            // Find the trailing 'return' statement (4)
             while (!ts.isReturnStatement(ts.elementAt(funcStatements, classBodyEnd))) {
                 classBodyEnd--;
             }
-            // When we extract the statements of the inner IIFE, we exclude the 'return' statement (4)
-            // as we already have one that has been introduced by the 'ts' transformer.
             ts.addRange(statements, funcStatements, classBodyStart, classBodyEnd);
             if (classBodyEnd < -1) {
-                // If there were any hoisted declarations following the return statement, we should
-                // append them.
                 ts.addRange(statements, funcStatements, classBodyEnd + 1);
             }
-            // Add the remaining statements of the outer wrapper.
             ts.addRange(statements, remainingStatements);
-            // The 'es2015' class transform may add an end-of-declaration marker. If so we will add it
-            // after the remaining statements from the 'ts' transformer.
-            ts.addRange(statements, classStatements, /*start*/ 1);
-            // Recreate any outer parentheses or partially-emitted expressions to preserve source map
-            // and comment locations.
-            return ts.recreateOuterExpressions(node.expression, ts.recreateOuterExpressions(variable.initializer, ts.recreateOuterExpressions(aliasAssignment && aliasAssignment.right, ts.updateCall(call, ts.recreateOuterExpressions(call.expression, ts.updateFunctionExpression(func, 
-            /*modifiers*/ undefined, 
-            /*asteriskToken*/ undefined, 
-            /*name*/ undefined, 
-            /*typeParameters*/ undefined, func.parameters, 
-            /*type*/ undefined, ts.updateBlock(func.body, statements))), 
-            /*typeArguments*/ undefined, call.arguments))));
+            ts.addRange(statements, classStatements, 1);
+            return ts.recreateOuterExpressions(node.expression, ts.recreateOuterExpressions(variable.initializer, ts.recreateOuterExpressions(aliasAssignment && aliasAssignment.right, ts.updateCall(call, ts.recreateOuterExpressions(call.expression, ts.updateFunctionExpression(func, undefined, undefined, undefined, undefined, func.parameters, undefined, ts.updateBlock(func.body, statements))), undefined, call.arguments))));
         }
         function visitImmediateSuperCallInBody(node) {
-            return visitCallExpressionWithPotentialCapturedThisAssignment(node, /*assignToCapturedThis*/ false);
+            return visitCallExpressionWithPotentialCapturedThisAssignment(node, false);
         }
         function visitCallExpressionWithPotentialCapturedThisAssignment(node, assignToCapturedThis) {
-            // We are here either because SuperKeyword was used somewhere in the expression, or
-            // because we contain a SpreadElementExpression.
-            if (node.transformFlags & 524288 /* ContainsSpread */ ||
-                node.expression.kind === 97 /* SuperKeyword */ ||
+            if (node.transformFlags & 524288 ||
+                node.expression.kind === 97 ||
                 ts.isSuperProperty(ts.skipOuterExpressions(node.expression))) {
                 var _a = ts.createCallBinding(node.expression, hoistVariableDeclaration), target = _a.target, thisArg = _a.thisArg;
-                if (node.expression.kind === 97 /* SuperKeyword */) {
-                    ts.setEmitFlags(thisArg, 4 /* NoSubstitution */);
+                if (node.expression.kind === 97) {
+                    ts.setEmitFlags(thisArg, 4);
                 }
                 var resultingCall = void 0;
-                if (node.transformFlags & 524288 /* ContainsSpread */) {
-                    // [source]
-                    //      f(...a, b)
-                    //      x.m(...a, b)
-                    //      super(...a, b)
-                    //      super.m(...a, b) // in static
-                    //      super.m(...a, b) // in instance
-                    //
-                    // [output]
-                    //      f.apply(void 0, a.concat([b]))
-                    //      (_a = x).m.apply(_a, a.concat([b]))
-                    //      _super.apply(this, a.concat([b]))
-                    //      _super.m.apply(this, a.concat([b]))
-                    //      _super.prototype.m.apply(this, a.concat([b]))
-                    resultingCall = ts.createFunctionApply(ts.visitNode(target, callExpressionVisitor, ts.isExpression), ts.visitNode(thisArg, visitor, ts.isExpression), transformAndSpreadElements(node.arguments, /*needsUniqueCopy*/ false, /*multiLine*/ false, /*hasTrailingComma*/ false));
+                if (node.transformFlags & 524288) {
+                    resultingCall = ts.createFunctionApply(ts.visitNode(target, callExpressionVisitor, ts.isExpression), ts.visitNode(thisArg, visitor, ts.isExpression), transformAndSpreadElements(node.arguments, false, false, false));
                 }
                 else {
-                    // [source]
-                    //      super(a)
-                    //      super.m(a) // in static
-                    //      super.m(a) // in instance
-                    //
-                    // [output]
-                    //      _super.call(this, a)
-                    //      _super.m.call(this, a)
-                    //      _super.prototype.m.call(this, a)
-                    resultingCall = ts.createFunctionCall(ts.visitNode(target, callExpressionVisitor, ts.isExpression), ts.visitNode(thisArg, visitor, ts.isExpression), ts.visitNodes(node.arguments, visitor, ts.isExpression), 
-                    /*location*/ node);
-                }
-                if (node.expression.kind === 97 /* SuperKeyword */) {
+                    resultingCall = ts.createFunctionCall(ts.visitNode(target, callExpressionVisitor, ts.isExpression), ts.visitNode(thisArg, visitor, ts.isExpression), ts.visitNodes(node.arguments, visitor, ts.isExpression), node);
+                }
+                if (node.expression.kind === 97) {
                     var actualThis = ts.createThis();
-                    ts.setEmitFlags(actualThis, 4 /* NoSubstitution */);
+                    ts.setEmitFlags(actualThis, 4);
                     var initializer = ts.createLogicalOr(resultingCall, actualThis);
                     resultingCall = assignToCapturedThis
                         ? ts.createAssignment(ts.createFileLevelUniqueName("_this"), initializer)
@@ -68213,40 +55784,14 @@ var ts;
             }
             return ts.visitEachChild(node, visitor, context);
         }
-        /**
-         * Visits a NewExpression that contains a spread element.
-         *
-         * @param node A NewExpression node.
-         */
         function visitNewExpression(node) {
-            if (node.transformFlags & 524288 /* ContainsSpread */) {
-                // We are here because we contain a SpreadElementExpression.
-                // [source]
-                //      new C(...a)
-                //
-                // [output]
-                //      new ((_a = C).bind.apply(_a, [void 0].concat(a)))()
+            if (node.transformFlags & 524288) {
                 var _a = ts.createCallBinding(ts.createPropertyAccess(node.expression, "bind"), hoistVariableDeclaration), target = _a.target, thisArg = _a.thisArg;
-                return ts.createNew(ts.createFunctionApply(ts.visitNode(target, visitor, ts.isExpression), thisArg, transformAndSpreadElements(ts.createNodeArray([ts.createVoidZero()].concat(node.arguments)), /*needsUniqueCopy*/ false, /*multiLine*/ false, /*hasTrailingComma*/ false)), 
-                /*typeArguments*/ undefined, []);
+                return ts.createNew(ts.createFunctionApply(ts.visitNode(target, visitor, ts.isExpression), thisArg, transformAndSpreadElements(ts.createNodeArray([ts.createVoidZero()].concat(node.arguments)), false, false, false)), undefined, []);
             }
             return ts.visitEachChild(node, visitor, context);
         }
-        /**
-         * Transforms an array of Expression nodes that contains a SpreadExpression.
-         *
-         * @param elements The array of Expression nodes.
-         * @param needsUniqueCopy A value indicating whether to ensure that the result is a fresh array.
-         * @param multiLine A value indicating whether the result should be emitted on multiple lines.
-         */
         function transformAndSpreadElements(elements, needsUniqueCopy, multiLine, hasTrailingComma) {
-            // [source]
-            //      [a, ...b, c]
-            //
-            // [output]
-            //      [a].concat(b, [c])
-            // Map spans of spread expressions into their expressions and spans of other
-            // expressions into an array literal.
             var numElements = elements.length;
             var segments = ts.flatten(ts.spanMap(elements, partitionSpread, function (partition, visitPartition, _start, end) {
                 return visitPartition(partition, multiLine, hasTrailingComma && end === numElements);
@@ -68256,7 +55801,7 @@ var ts;
                     var firstSegment = segments[0];
                     if (ts.isCallExpression(firstSegment)
                         && ts.isIdentifier(firstSegment.expression)
-                        && (ts.getEmitFlags(firstSegment.expression) & 4096 /* HelperName */)
+                        && (ts.getEmitFlags(firstSegment.expression) & 4096)
                         && firstSegment.expression.escapedText === "___spread") {
                         return segments[0];
                     }
@@ -68266,11 +55811,10 @@ var ts;
             else {
                 if (segments.length === 1) {
                     var firstElement = elements[0];
-                    return needsUniqueCopy && ts.isSpreadElement(firstElement) && firstElement.expression.kind !== 183 /* ArrayLiteralExpression */
+                    return needsUniqueCopy && ts.isSpreadElement(firstElement) && firstElement.expression.kind !== 183
                         ? ts.createArraySlice(segments[0])
                         : segments[0];
                 }
-                // Rewrite using the pattern <segment0>.concat(<segment1>, <segment2>, ...)
                 return ts.createArrayConcat(segments.shift(), segments);
             }
         }
@@ -68288,55 +55832,26 @@ var ts;
         function visitSpreadElement(node) {
             return ts.visitNode(node.expression, visitor, ts.isExpression);
         }
-        /**
-         * Transforms the expression of a SpreadExpression node.
-         *
-         * @param node A SpreadExpression node.
-         */
         function visitExpressionOfSpread(node) {
             return ts.visitNode(node.expression, visitor, ts.isExpression);
         }
-        /**
-         * Visits a template literal.
-         *
-         * @param node A template literal.
-         */
         function visitTemplateLiteral(node) {
             return ts.setTextRange(ts.createLiteral(node.text), node);
         }
-        /**
-         * Visits a string literal with an extended unicode escape.
-         *
-         * @param node A string literal.
-         */
         function visitStringLiteral(node) {
             if (node.hasExtendedUnicodeEscape) {
                 return ts.setTextRange(ts.createLiteral(node.text), node);
             }
             return node;
         }
-        /**
-         * Visits a binary or octal (ES6) numeric literal.
-         *
-         * @param node A string literal.
-         */
         function visitNumericLiteral(node) {
-            if (node.numericLiteralFlags & 384 /* BinaryOrOctalSpecifier */) {
+            if (node.numericLiteralFlags & 384) {
                 return ts.setTextRange(ts.createNumericLiteral(node.text), node);
             }
             return node;
         }
-        /**
-         * Visits a TaggedTemplateExpression node.
-         *
-         * @param node A TaggedTemplateExpression node.
-         */
         function visitTaggedTemplateExpression(node) {
-            // Visit the tag expression
             var tag = ts.visitNode(node.tag, visitor, ts.isExpression);
-            // Build up the template arguments and the raw and cooked strings for the template.
-            // We start out with 'undefined' for the first argument and revisit later
-            // to avoid walking over the template string twice and shifting all our arguments over after the fact.
             var templateArguments = [undefined];
             var cookedStrings = [];
             var rawStrings = [];
@@ -68356,9 +55871,6 @@ var ts;
                 }
             }
             var helperCall = createTemplateObjectHelper(context, ts.createArrayLiteral(cookedStrings), ts.createArrayLiteral(rawStrings));
-            // Create a variable to cache the template object if we're in a module.
-            // Do not do this in the global scope, as any variable we currently generate could conflict with
-            // variables from outside of the current compilation. In the future, we can revisit this behavior.
             if (ts.isExternalModule(currentSourceFile)) {
                 var tempVar = ts.createUniqueName("templateObject");
                 recordTaggedTemplateString(tempVar);
@@ -68367,48 +55879,19 @@ var ts;
             else {
                 templateArguments[0] = helperCall;
             }
-            return ts.createCall(tag, /*typeArguments*/ undefined, templateArguments);
+            return ts.createCall(tag, undefined, templateArguments);
         }
-        /**
-         * Creates an ES5 compatible literal from an ES6 template literal.
-         *
-         * @param node The ES6 template literal.
-         */
         function getRawLiteral(node) {
-            // Find original source text, since we need to emit the raw strings of the tagged template.
-            // The raw strings contain the (escaped) strings of what the user wrote.
-            // Examples: `\n` is converted to "\\n", a template string with a newline to "\n".
             var text = ts.getSourceTextOfNodeFromSourceFile(currentSourceFile, node);
-            // text contains the original source, it will also contain quotes ("`"), dolar signs and braces ("${" and "}"),
-            // thus we need to remove those characters.
-            // First template piece starts with "`", others with "}"
-            // Last template piece ends with "`", others with "${"
-            var isLast = node.kind === 13 /* NoSubstitutionTemplateLiteral */ || node.kind === 16 /* TemplateTail */;
+            var isLast = node.kind === 13 || node.kind === 16;
             text = text.substring(1, text.length - (isLast ? 1 : 2));
-            // Newline normalization:
-            // ES6 Spec 11.8.6.1 - Static Semantics of TV's and TRV's
-            // <CR><LF> and <CR> LineTerminatorSequences are normalized to <LF> for both TV and TRV.
             text = text.replace(/\r\n?/g, "\n");
             return ts.setTextRange(ts.createLiteral(text), node);
         }
-        /**
-         * Visits a TemplateExpression node.
-         *
-         * @param node A TemplateExpression node.
-         */
         function visitTemplateExpression(node) {
             var expressions = [];
             addTemplateHead(expressions, node);
             addTemplateSpans(expressions, node);
-            // createAdd will check if each expression binds less closely than binary '+'.
-            // If it does, it wraps the expression in parentheses. Otherwise, something like
-            //    `abc${ 1 << 2 }`
-            // becomes
-            //    "abc" + 1 << 2 + ""
-            // which is really
-            //    ("abc" + 1) << (2 + "")
-            // rather than
-            //    "abc" + (1 << 2) + ""
             var expression = ts.reduceLeft(expressions, ts.createAdd);
             if (ts.nodeIsSynthesized(expression)) {
                 expression.pos = node.pos;
@@ -68416,137 +55899,76 @@ var ts;
             }
             return expression;
         }
-        /**
-         * Gets a value indicating whether we need to include the head of a TemplateExpression.
-         *
-         * @param node A TemplateExpression node.
-         */
         function shouldAddTemplateHead(node) {
-            // If this expression has an empty head literal and the first template span has a non-empty
-            // literal, then emitting the empty head literal is not necessary.
-            //     `${ foo } and ${ bar }`
-            // can be emitted as
-            //     foo + " and " + bar
-            // This is because it is only required that one of the first two operands in the emit
-            // output must be a string literal, so that the other operand and all following operands
-            // are forced into strings.
-            //
-            // If the first template span has an empty literal, then the head must still be emitted.
-            //     `${ foo }${ bar }`
-            // must still be emitted as
-            //     "" + foo + bar
-            // There is always atleast one templateSpan in this code path, since
-            // NoSubstitutionTemplateLiterals are directly emitted via emitLiteral()
             ts.Debug.assert(node.templateSpans.length !== 0);
             return node.head.text.length !== 0 || node.templateSpans[0].literal.text.length === 0;
         }
-        /**
-         * Adds the head of a TemplateExpression to an array of expressions.
-         *
-         * @param expressions An array of expressions.
-         * @param node A TemplateExpression node.
-         */
         function addTemplateHead(expressions, node) {
             if (!shouldAddTemplateHead(node)) {
                 return;
             }
             expressions.push(ts.createLiteral(node.head.text));
         }
-        /**
-         * Visits and adds the template spans of a TemplateExpression to an array of expressions.
-         *
-         * @param expressions An array of expressions.
-         * @param node A TemplateExpression node.
-         */
         function addTemplateSpans(expressions, node) {
             for (var _i = 0, _a = node.templateSpans; _i < _a.length; _i++) {
                 var span = _a[_i];
                 expressions.push(ts.visitNode(span.expression, visitor, ts.isExpression));
-                // Only emit if the literal is non-empty.
-                // The binary '+' operator is left-associative, so the first string concatenation
-                // with the head will force the result up to this point to be a string.
-                // Emitting a '+ ""' has no semantic effect for middles and tails.
                 if (span.literal.text.length !== 0) {
                     expressions.push(ts.createLiteral(span.literal.text));
                 }
             }
         }
-        /**
-         * Visits the `super` keyword
-         */
         function visitSuperKeyword(isExpressionOfCall) {
-            return hierarchyFacts & 8 /* NonStaticClassElement */
+            return hierarchyFacts & 8
                 && !isExpressionOfCall
                 ? ts.createPropertyAccess(ts.createFileLevelUniqueName("_super"), "prototype")
                 : ts.createFileLevelUniqueName("_super");
         }
         function visitMetaProperty(node) {
-            if (node.keywordToken === 94 /* NewKeyword */ && node.name.escapedText === "target") {
-                if (hierarchyFacts & 8192 /* ComputedPropertyName */) {
-                    hierarchyFacts |= 32768 /* NewTargetInComputedPropertyName */;
+            if (node.keywordToken === 94 && node.name.escapedText === "target") {
+                if (hierarchyFacts & 8192) {
+                    hierarchyFacts |= 32768;
                 }
                 else {
-                    hierarchyFacts |= 16384 /* NewTarget */;
+                    hierarchyFacts |= 16384;
                 }
                 return ts.createFileLevelUniqueName("_newTarget");
             }
             return node;
         }
-        /**
-         * Called by the printer just before a node is printed.
-         *
-         * @param hint A hint as to the intended usage of the node.
-         * @param node The node to be printed.
-         * @param emitCallback The callback used to emit the node.
-         */
         function onEmitNode(hint, node, emitCallback) {
-            if (enabledSubstitutions & 1 /* CapturedThis */ && ts.isFunctionLike(node)) {
-                // If we are tracking a captured `this`, keep track of the enclosing function.
-                var ancestorFacts = enterSubtree(16286 /* FunctionExcludes */, ts.getEmitFlags(node) & 8 /* CapturesThis */
-                    ? 65 /* FunctionIncludes */ | 16 /* CapturesThis */
-                    : 65 /* FunctionIncludes */);
+            if (enabledSubstitutions & 1 && ts.isFunctionLike(node)) {
+                var ancestorFacts = enterSubtree(16286, ts.getEmitFlags(node) & 8
+                    ? 65 | 16
+                    : 65);
                 previousOnEmitNode(hint, node, emitCallback);
-                exitSubtree(ancestorFacts, 0 /* None */, 0 /* None */);
+                exitSubtree(ancestorFacts, 0, 0);
                 return;
             }
             previousOnEmitNode(hint, node, emitCallback);
         }
-        /**
-         * Enables a more costly code path for substitutions when we determine a source file
-         * contains block-scoped bindings (e.g. `let` or `const`).
-         */
         function enableSubstitutionsForBlockScopedBindings() {
-            if ((enabledSubstitutions & 2 /* BlockScopedBindings */) === 0) {
-                enabledSubstitutions |= 2 /* BlockScopedBindings */;
-                context.enableSubstitution(71 /* Identifier */);
+            if ((enabledSubstitutions & 2) === 0) {
+                enabledSubstitutions |= 2;
+                context.enableSubstitution(71);
             }
         }
-        /**
-         * Enables a more costly code path for substitutions when we determine a source file
-         * contains a captured `this`.
-         */
         function enableSubstitutionsForCapturedThis() {
-            if ((enabledSubstitutions & 1 /* CapturedThis */) === 0) {
-                enabledSubstitutions |= 1 /* CapturedThis */;
-                context.enableSubstitution(99 /* ThisKeyword */);
-                context.enableEmitNotification(155 /* Constructor */);
-                context.enableEmitNotification(154 /* MethodDeclaration */);
-                context.enableEmitNotification(156 /* GetAccessor */);
-                context.enableEmitNotification(157 /* SetAccessor */);
-                context.enableEmitNotification(193 /* ArrowFunction */);
-                context.enableEmitNotification(192 /* FunctionExpression */);
-                context.enableEmitNotification(234 /* FunctionDeclaration */);
-            }
-        }
-        /**
-         * Hooks node substitutions.
-         *
-         * @param hint The context for the emitter.
-         * @param node The node to substitute.
-         */
+            if ((enabledSubstitutions & 1) === 0) {
+                enabledSubstitutions |= 1;
+                context.enableSubstitution(99);
+                context.enableEmitNotification(155);
+                context.enableEmitNotification(154);
+                context.enableEmitNotification(156);
+                context.enableEmitNotification(157);
+                context.enableEmitNotification(193);
+                context.enableEmitNotification(192);
+                context.enableEmitNotification(234);
+            }
+        }
         function onSubstituteNode(hint, node) {
             node = previousOnSubstituteNode(hint, node);
-            if (hint === 1 /* Expression */) {
+            if (hint === 1) {
                 return substituteExpression(node);
             }
             if (ts.isIdentifier(node)) {
@@ -68554,13 +55976,8 @@ var ts;
             }
             return node;
         }
-        /**
-         * Hooks substitutions for non-expression identifiers.
-         */
         function substituteIdentifier(node) {
-            // Only substitute the identifier if we have enabled substitutions for block-scoped
-            // bindings.
-            if (enabledSubstitutions & 2 /* BlockScopedBindings */ && !ts.isInternalName(node)) {
+            if (enabledSubstitutions & 2 && !ts.isInternalName(node)) {
                 var original = ts.getParseTreeNode(node, ts.isIdentifier);
                 if (original && isNameOfDeclarationWithCollidingName(original)) {
                     return ts.setTextRange(ts.getGeneratedNameForNode(original), node);
@@ -68568,44 +55985,28 @@ var ts;
             }
             return node;
         }
-        /**
-         * Determines whether a name is the name of a declaration with a colliding name.
-         * NOTE: This function expects to be called with an original source tree node.
-         *
-         * @param node An original source tree node.
-         */
         function isNameOfDeclarationWithCollidingName(node) {
             switch (node.parent.kind) {
-                case 182 /* BindingElement */:
-                case 235 /* ClassDeclaration */:
-                case 238 /* EnumDeclaration */:
-                case 232 /* VariableDeclaration */:
+                case 182:
+                case 235:
+                case 238:
+                case 232:
                     return node.parent.name === node
                         && resolver.isDeclarationWithCollidingName(node.parent);
             }
             return false;
         }
-        /**
-         * Substitutes an expression.
-         *
-         * @param node An Expression node.
-         */
         function substituteExpression(node) {
             switch (node.kind) {
-                case 71 /* Identifier */:
+                case 71:
                     return substituteExpressionIdentifier(node);
-                case 99 /* ThisKeyword */:
+                case 99:
                     return substituteThisKeyword(node);
             }
             return node;
         }
-        /**
-         * Substitutes an expression identifier.
-         *
-         * @param node An Identifier node.
-         */
         function substituteExpressionIdentifier(node) {
-            if (enabledSubstitutions & 2 /* BlockScopedBindings */ && !ts.isInternalName(node)) {
+            if (enabledSubstitutions & 2 && !ts.isInternalName(node)) {
                 var declaration = resolver.getReferencedDeclarationWithCollidingName(node);
                 if (declaration && !(ts.isClassLike(declaration) && isPartOfClassBody(declaration, node))) {
                     return ts.setTextRange(ts.getGeneratedNameForNode(ts.getNameOfDeclaration(declaration)), node);
@@ -68616,17 +56017,11 @@ var ts;
         function isPartOfClassBody(declaration, node) {
             var currentNode = ts.getParseTreeNode(node);
             if (!currentNode || currentNode === declaration || currentNode.end <= declaration.pos || currentNode.pos >= declaration.end) {
-                // if the node has no correlation to a parse tree node, its definitely not
-                // part of the body.
-                // if the node is outside of the document range of the declaration, its
-                // definitely not part of the body.
                 return false;
             }
             var blockScope = ts.getEnclosingBlockScopeContainer(declaration);
             while (currentNode) {
                 if (currentNode === blockScope || currentNode === declaration) {
-                    // if we are in the enclosing block scope of the declaration, we are definitely
-                    // not inside the class body.
                     return false;
                 }
                 if (ts.isClassElement(currentNode) && currentNode.parent === declaration) {
@@ -68636,20 +56031,15 @@ var ts;
             }
             return false;
         }
-        /**
-         * Substitutes `this` when contained within an arrow function.
-         *
-         * @param node The ThisKeyword node.
-         */
         function substituteThisKeyword(node) {
-            if (enabledSubstitutions & 1 /* CapturedThis */
-                && hierarchyFacts & 16 /* CapturesThis */) {
+            if (enabledSubstitutions & 1
+                && hierarchyFacts & 16) {
                 return ts.setTextRange(ts.createFileLevelUniqueName("_this"), node);
             }
             return node;
         }
         function getClassMemberPrefix(node, member) {
-            return ts.hasModifier(member, 32 /* Static */)
+            return ts.hasModifier(member, 32)
                 ? ts.getInternalName(node)
                 : ts.createPropertyAccess(ts.getInternalName(node), "prototype");
         }
@@ -68661,19 +56051,19 @@ var ts;
                 return false;
             }
             var statement = ts.firstOrUndefined(constructor.body.statements);
-            if (!statement || !ts.nodeIsSynthesized(statement) || statement.kind !== 216 /* ExpressionStatement */) {
+            if (!statement || !ts.nodeIsSynthesized(statement) || statement.kind !== 216) {
                 return false;
             }
             var statementExpression = statement.expression;
-            if (!ts.nodeIsSynthesized(statementExpression) || statementExpression.kind !== 187 /* CallExpression */) {
+            if (!ts.nodeIsSynthesized(statementExpression) || statementExpression.kind !== 187) {
                 return false;
             }
             var callTarget = statementExpression.expression;
-            if (!ts.nodeIsSynthesized(callTarget) || callTarget.kind !== 97 /* SuperKeyword */) {
+            if (!ts.nodeIsSynthesized(callTarget) || callTarget.kind !== 97) {
                 return false;
             }
             var callArgument = ts.singleOrUndefined(statementExpression.arguments);
-            if (!callArgument || !ts.nodeIsSynthesized(callArgument) || callArgument.kind !== 204 /* SpreadElement */) {
+            if (!callArgument || !ts.nodeIsSynthesized(callArgument) || callArgument.kind !== 204) {
                 return false;
             }
             var expression = callArgument.expression;
@@ -68683,16 +56073,14 @@ var ts;
     ts.transformES2015 = transformES2015;
     function createExtendsHelper(context, name) {
         context.requestEmitHelper(extendsHelper);
-        return ts.createCall(ts.getHelperName("__extends"), 
-        /*typeArguments*/ undefined, [
+        return ts.createCall(ts.getHelperName("__extends"), undefined, [
             name,
             ts.createFileLevelUniqueName("_super")
         ]);
     }
     function createTemplateObjectHelper(context, cooked, raw) {
         context.requestEmitHelper(templateObjectHelper);
-        return ts.createCall(ts.getHelperName("__makeTemplateObject"), 
-        /*typeArguments*/ undefined, [
+        return ts.createCall(ts.getHelperName("__makeTemplateObject"), undefined, [
             cooked,
             raw
         ]);
@@ -68710,64 +56098,39 @@ var ts;
         text: "\n            var __makeTemplateObject = (this && this.__makeTemplateObject) || function (cooked, raw) {\n                if (Object.defineProperty) { Object.defineProperty(cooked, \"raw\", { value: raw }); } else { cooked.raw = raw; }\n                return cooked;\n            };"
     };
 })(ts || (ts = {}));
-/*@internal*/
 var ts;
 (function (ts) {
-    /**
-     * Transforms ES5 syntax into ES3 syntax.
-     *
-     * @param context Context and state information for the transformation.
-     */
     function transformES5(context) {
         var compilerOptions = context.getCompilerOptions();
-        // enable emit notification only if using --jsx preserve or react-native
         var previousOnEmitNode;
         var noSubstitution;
-        if (compilerOptions.jsx === 1 /* Preserve */ || compilerOptions.jsx === 3 /* ReactNative */) {
+        if (compilerOptions.jsx === 1 || compilerOptions.jsx === 3) {
             previousOnEmitNode = context.onEmitNode;
             context.onEmitNode = onEmitNode;
-            context.enableEmitNotification(257 /* JsxOpeningElement */);
-            context.enableEmitNotification(258 /* JsxClosingElement */);
-            context.enableEmitNotification(256 /* JsxSelfClosingElement */);
+            context.enableEmitNotification(257);
+            context.enableEmitNotification(258);
+            context.enableEmitNotification(256);
             noSubstitution = [];
         }
         var previousOnSubstituteNode = context.onSubstituteNode;
         context.onSubstituteNode = onSubstituteNode;
-        context.enableSubstitution(185 /* PropertyAccessExpression */);
-        context.enableSubstitution(270 /* PropertyAssignment */);
+        context.enableSubstitution(185);
+        context.enableSubstitution(270);
         return ts.chainBundle(transformSourceFile);
-        /**
-         * Transforms an ES5 source file to ES3.
-         *
-         * @param node A SourceFile
-         */
         function transformSourceFile(node) {
             return node;
         }
-        /**
-         * Called by the printer just before a node is printed.
-         *
-         * @param hint A hint as to the intended usage of the node.
-         * @param node The node to emit.
-         * @param emitCallback A callback used to emit the node.
-         */
         function onEmitNode(hint, node, emitCallback) {
             switch (node.kind) {
-                case 257 /* JsxOpeningElement */:
-                case 258 /* JsxClosingElement */:
-                case 256 /* JsxSelfClosingElement */:
+                case 257:
+                case 258:
+                case 256:
                     var tagName = node.tagName;
                     noSubstitution[ts.getOriginalNodeId(tagName)] = true;
                     break;
             }
             previousOnEmitNode(hint, node, emitCallback);
         }
-        /**
-         * Hooks node substitutions.
-         *
-         * @param hint A hint as to the intended usage of the node.
-         * @param node The node to substitute.
-         */
         function onSubstituteNode(hint, node) {
             if (node.id && noSubstitution && noSubstitution[node.id]) {
                 return previousOnSubstituteNode(hint, node);
@@ -68781,11 +56144,6 @@ var ts;
             }
             return node;
         }
-        /**
-         * Substitutes a PropertyAccessExpression whose name is a reserved word.
-         *
-         * @param node A PropertyAccessExpression
-         */
         function substitutePropertyAccessExpression(node) {
             var literalName = trySubstituteReservedName(node.name);
             if (literalName) {
@@ -68793,11 +56151,6 @@ var ts;
             }
             return node;
         }
-        /**
-         * Substitutes a PropertyAssignment whose name is a reserved word.
-         *
-         * @param node A PropertyAssignment
-         */
         function substitutePropertyAssignment(node) {
             var literalName = ts.isIdentifier(node.name) && trySubstituteReservedName(node.name);
             if (literalName) {
@@ -68805,14 +56158,9 @@ var ts;
             }
             return node;
         }
-        /**
-         * If an identifier name is a reserved word, returns a string literal for the name.
-         *
-         * @param name An Identifier
-         */
         function trySubstituteReservedName(name) {
             var token = name.originalKeywordKind || (ts.nodeIsSynthesized(name) ? ts.stringToToken(ts.idText(name)) : undefined);
-            if (token !== undefined && token >= 72 /* FirstReservedWord */ && token <= 107 /* LastReservedWord */) {
+            if (token !== undefined && token >= 72 && token <= 107) {
                 return ts.setTextRange(ts.createLiteral(name), name);
             }
             return undefined;
@@ -68820,184 +56168,16 @@ var ts;
     }
     ts.transformES5 = transformES5;
 })(ts || (ts = {}));
-// Transforms generator functions into a compatible ES5 representation with similar runtime
-// semantics. This is accomplished by first transforming the body of each generator
-// function into an intermediate representation that is the compiled into a JavaScript
-// switch statement.
-//
-// Many functions in this transformer will contain comments indicating the expected
-// intermediate representation. For illustrative purposes, the following intermediate
-// language is used to define this intermediate representation:
-//
-//  .nop                            - Performs no operation.
-//  .local NAME, ...                - Define local variable declarations.
-//  .mark LABEL                     - Mark the location of a label.
-//  .br LABEL                       - Jump to a label. If jumping out of a protected
-//                                    region, all .finally blocks are executed.
-//  .brtrue LABEL, (x)              - Jump to a label IIF the expression `x` is truthy.
-//                                    If jumping out of a protected region, all .finally
-//                                    blocks are executed.
-//  .brfalse LABEL, (x)             - Jump to a label IIF the expression `x` is falsey.
-//                                    If jumping out of a protected region, all .finally
-//                                    blocks are executed.
-//  .yield (x)                      - Yield the value of the optional expression `x`.
-//                                    Resume at the next label.
-//  .yieldstar (x)                  - Delegate yield to the value of the optional
-//                                    expression `x`. Resume at the next label.
-//                                    NOTE: `x` must be an Iterator, not an Iterable.
-//  .loop CONTINUE, BREAK           - Marks the beginning of a loop. Any "continue" or
-//                                    "break" abrupt completions jump to the CONTINUE or
-//                                    BREAK labels, respectively.
-//  .endloop                        - Marks the end of a loop.
-//  .with (x)                       - Marks the beginning of a WithStatement block, using
-//                                    the supplied expression.
-//  .endwith                        - Marks the end of a WithStatement.
-//  .switch                         - Marks the beginning of a SwitchStatement.
-//  .endswitch                      - Marks the end of a SwitchStatement.
-//  .labeled NAME                   - Marks the beginning of a LabeledStatement with the
-//                                    supplied name.
-//  .endlabeled                     - Marks the end of a LabeledStatement.
-//  .try TRY, CATCH, FINALLY, END   - Marks the beginning of a protected region, and the
-//                                    labels for each block.
-//  .catch (x)                      - Marks the beginning of a catch block.
-//  .finally                        - Marks the beginning of a finally block.
-//  .endfinally                     - Marks the end of a finally block.
-//  .endtry                         - Marks the end of a protected region.
-//  .throw (x)                      - Throws the value of the expression `x`.
-//  .return (x)                     - Returns the value of the expression `x`.
-//
-// In addition, the illustrative intermediate representation introduces some special
-// variables:
-//
-//  %sent%                          - Either returns the next value sent to the generator,
-//                                    returns the result of a delegated yield, or throws
-//                                    the exception sent to the generator.
-//  %error%                         - Returns the value of the current exception in a
-//                                    catch block.
-//
-// This intermediate representation is then compiled into JavaScript syntax. The resulting
-// compilation output looks something like the following:
-//
-//  function f() {
-//      var /*locals*/;
-//      /*functions*/
-//      return __generator(function (state) {
-//          switch (state.label) {
-//              /*cases per label*/
-//          }
-//      });
-//  }
-//
-// Each of the above instructions corresponds to JavaScript emit similar to the following:
-//
-//  .local NAME                   | var NAME;
-// -------------------------------|----------------------------------------------
-//  .mark LABEL                   | case LABEL:
-// -------------------------------|----------------------------------------------
-//  .br LABEL                     |     return [3 /*break*/, LABEL];
-// -------------------------------|----------------------------------------------
-//  .brtrue LABEL, (x)            |     if (x) return [3 /*break*/, LABEL];
-// -------------------------------|----------------------------------------------
-//  .brfalse LABEL, (x)           |     if (!(x)) return [3, /*break*/, LABEL];
-// -------------------------------|----------------------------------------------
-//  .yield (x)                    |     return [4 /*yield*/, x];
-//  .mark RESUME                  | case RESUME:
-//      a = %sent%;               |     a = state.sent();
-// -------------------------------|----------------------------------------------
-//  .yieldstar (x)                |     return [5 /*yield**/, x];
-//  .mark RESUME                  | case RESUME:
-//      a = %sent%;               |     a = state.sent();
-// -------------------------------|----------------------------------------------
-//  .with (_a)                    |     with (_a) {
-//      a();                      |         a();
-//                                |     }
-//                                |     state.label = LABEL;
-//  .mark LABEL                   | case LABEL:
-//                                |     with (_a) {
-//      b();                      |         b();
-//                                |     }
-//  .endwith                      |
-// -------------------------------|----------------------------------------------
-//                                | case 0:
-//                                |     state.trys = [];
-//                                | ...
-//  .try TRY, CATCH, FINALLY, END |
-//  .mark TRY                     | case TRY:
-//                                |     state.trys.push([TRY, CATCH, FINALLY, END]);
-//  .nop                          |
-//      a();                      |     a();
-//  .br END                       |     return [3 /*break*/, END];
-//  .catch (e)                    |
-//  .mark CATCH                   | case CATCH:
-//                                |     e = state.sent();
-//      b();                      |     b();
-//  .br END                       |     return [3 /*break*/, END];
-//  .finally                      |
-//  .mark FINALLY                 | case FINALLY:
-//      c();                      |     c();
-//  .endfinally                   |     return [7 /*endfinally*/];
-//  .endtry                       |
-//  .mark END                     | case END:
-/*@internal*/
 var ts;
 (function (ts) {
-    var OpCode;
-    (function (OpCode) {
-        OpCode[OpCode["Nop"] = 0] = "Nop";
-        OpCode[OpCode["Statement"] = 1] = "Statement";
-        OpCode[OpCode["Assign"] = 2] = "Assign";
-        OpCode[OpCode["Break"] = 3] = "Break";
-        OpCode[OpCode["BreakWhenTrue"] = 4] = "BreakWhenTrue";
-        OpCode[OpCode["BreakWhenFalse"] = 5] = "BreakWhenFalse";
-        OpCode[OpCode["Yield"] = 6] = "Yield";
-        OpCode[OpCode["YieldStar"] = 7] = "YieldStar";
-        OpCode[OpCode["Return"] = 8] = "Return";
-        OpCode[OpCode["Throw"] = 9] = "Throw";
-        OpCode[OpCode["Endfinally"] = 10] = "Endfinally"; // Marks the end of a `finally` block
-    })(OpCode || (OpCode = {}));
-    // whether a generated code block is opening or closing at the current operation for a FunctionBuilder
-    var BlockAction;
-    (function (BlockAction) {
-        BlockAction[BlockAction["Open"] = 0] = "Open";
-        BlockAction[BlockAction["Close"] = 1] = "Close";
-    })(BlockAction || (BlockAction = {}));
-    // the kind for a generated code block in a FunctionBuilder
-    var CodeBlockKind;
-    (function (CodeBlockKind) {
-        CodeBlockKind[CodeBlockKind["Exception"] = 0] = "Exception";
-        CodeBlockKind[CodeBlockKind["With"] = 1] = "With";
-        CodeBlockKind[CodeBlockKind["Switch"] = 2] = "Switch";
-        CodeBlockKind[CodeBlockKind["Loop"] = 3] = "Loop";
-        CodeBlockKind[CodeBlockKind["Labeled"] = 4] = "Labeled";
-    })(CodeBlockKind || (CodeBlockKind = {}));
-    // the state for a generated code exception block
-    var ExceptionBlockState;
-    (function (ExceptionBlockState) {
-        ExceptionBlockState[ExceptionBlockState["Try"] = 0] = "Try";
-        ExceptionBlockState[ExceptionBlockState["Catch"] = 1] = "Catch";
-        ExceptionBlockState[ExceptionBlockState["Finally"] = 2] = "Finally";
-        ExceptionBlockState[ExceptionBlockState["Done"] = 3] = "Done";
-    })(ExceptionBlockState || (ExceptionBlockState = {}));
-    // NOTE: changes to this enum should be reflected in the __generator helper.
-    var Instruction;
-    (function (Instruction) {
-        Instruction[Instruction["Next"] = 0] = "Next";
-        Instruction[Instruction["Throw"] = 1] = "Throw";
-        Instruction[Instruction["Return"] = 2] = "Return";
-        Instruction[Instruction["Break"] = 3] = "Break";
-        Instruction[Instruction["Yield"] = 4] = "Yield";
-        Instruction[Instruction["YieldStar"] = 5] = "YieldStar";
-        Instruction[Instruction["Catch"] = 6] = "Catch";
-        Instruction[Instruction["Endfinally"] = 7] = "Endfinally";
-    })(Instruction || (Instruction = {}));
     function getInstructionName(instruction) {
         switch (instruction) {
-            case 2 /* Return */: return "return";
-            case 3 /* Break */: return "break";
-            case 4 /* Yield */: return "yield";
-            case 5 /* YieldStar */: return "yield*";
-            case 7 /* Endfinally */: return "endfinally";
-            default: return undefined; // TODO: GH#18217
+            case 2: return "return";
+            case 3: return "break";
+            case 4: return "yield";
+            case 5: return "yield*";
+            case 7: return "endfinally";
+            default: return undefined;
         }
     }
     function transformGenerators(context) {
@@ -69011,57 +56191,36 @@ var ts;
         var renamedCatchVariableDeclarations;
         var inGeneratorFunctionBody;
         var inStatementContainingYield;
-        // The following three arrays store information about generated code blocks.
-        // All three arrays are correlated by their index. This approach is used over allocating
-        // objects to store the same information to avoid GC overhead.
-        //
-        var blocks; // Information about the code block
-        var blockOffsets; // The operation offset at which a code block begins or ends
-        var blockActions; // Whether the code block is opened or closed
-        var blockStack; // A stack of currently open code blocks
-        // Labels are used to mark locations in the code that can be the target of a Break (jump)
-        // operation. These are translated into case clauses in a switch statement.
-        // The following two arrays are correlated by their index. This approach is used over
-        // allocating objects to store the same information to avoid GC overhead.
-        //
-        var labelOffsets; // The operation offset at which the label is defined.
-        var labelExpressions; // The NumericLiteral nodes bound to each label.
-        var nextLabelId = 1; // The next label id to use.
-        // Operations store information about generated code for the function body. This
-        // Includes things like statements, assignments, breaks (jumps), and yields.
-        // The following three arrays are correlated by their index. This approach is used over
-        // allocating objects to store the same information to avoid GC overhead.
-        //
-        var operations; // The operation to perform.
-        var operationArguments; // The arguments to the operation.
-        var operationLocations; // The source map location for the operation.
-        var state; // The name of the state object used by the generator at runtime.
-        // The following variables store information used by the `build` function:
-        //
-        var blockIndex = 0; // The index of the current block.
-        var labelNumber = 0; // The current label number.
+        var blocks;
+        var blockOffsets;
+        var blockActions;
+        var blockStack;
+        var labelOffsets;
+        var labelExpressions;
+        var nextLabelId = 1;
+        var operations;
+        var operationArguments;
+        var operationLocations;
+        var state;
+        var blockIndex = 0;
+        var labelNumber = 0;
         var labelNumbers;
-        var lastOperationWasAbrupt; // Indicates whether the last operation was abrupt (break/continue).
-        var lastOperationWasCompletion; // Indicates whether the last operation was a completion (return/throw).
-        var clauses; // The case clauses generated for labels.
-        var statements; // The statements for the current label.
-        var exceptionBlockStack; // A stack of containing exception blocks.
-        var currentExceptionBlock; // The current exception block.
-        var withBlockStack; // A stack containing `with` blocks.
+        var lastOperationWasAbrupt;
+        var lastOperationWasCompletion;
+        var clauses;
+        var statements;
+        var exceptionBlockStack;
+        var currentExceptionBlock;
+        var withBlockStack;
         return ts.chainBundle(transformSourceFile);
         function transformSourceFile(node) {
-            if (node.isDeclarationFile || (node.transformFlags & 512 /* ContainsGenerator */) === 0) {
+            if (node.isDeclarationFile || (node.transformFlags & 512) === 0) {
                 return node;
             }
             var visited = ts.visitEachChild(node, visitor, context);
             ts.addEmitHelpers(visited, context.readEmitHelpers());
             return visited;
         }
-        /**
-         * Visits a node.
-         *
-         * @param node The node to visit.
-         */
         function visitor(node) {
             var transformFlags = node.transformFlags;
             if (inStatementContainingYield) {
@@ -69070,66 +56229,56 @@ var ts;
             else if (inGeneratorFunctionBody) {
                 return visitJavaScriptInGeneratorFunctionBody(node);
             }
-            else if (transformFlags & 256 /* Generator */) {
+            else if (transformFlags & 256) {
                 return visitGenerator(node);
             }
-            else if (transformFlags & 512 /* ContainsGenerator */) {
+            else if (transformFlags & 512) {
                 return ts.visitEachChild(node, visitor, context);
             }
             else {
                 return node;
             }
         }
-        /**
-         * Visits a node that is contained within a statement that contains yield.
-         *
-         * @param node The node to visit.
-         */
         function visitJavaScriptInStatementContainingYield(node) {
             switch (node.kind) {
-                case 218 /* DoStatement */:
+                case 218:
                     return visitDoStatement(node);
-                case 219 /* WhileStatement */:
+                case 219:
                     return visitWhileStatement(node);
-                case 227 /* SwitchStatement */:
+                case 227:
                     return visitSwitchStatement(node);
-                case 228 /* LabeledStatement */:
+                case 228:
                     return visitLabeledStatement(node);
                 default:
                     return visitJavaScriptInGeneratorFunctionBody(node);
             }
         }
-        /**
-         * Visits a node that is contained within a generator function.
-         *
-         * @param node The node to visit.
-         */
         function visitJavaScriptInGeneratorFunctionBody(node) {
             switch (node.kind) {
-                case 234 /* FunctionDeclaration */:
+                case 234:
                     return visitFunctionDeclaration(node);
-                case 192 /* FunctionExpression */:
+                case 192:
                     return visitFunctionExpression(node);
-                case 156 /* GetAccessor */:
-                case 157 /* SetAccessor */:
+                case 156:
+                case 157:
                     return visitAccessorDeclaration(node);
-                case 214 /* VariableStatement */:
+                case 214:
                     return visitVariableStatement(node);
-                case 220 /* ForStatement */:
+                case 220:
                     return visitForStatement(node);
-                case 221 /* ForInStatement */:
+                case 221:
                     return visitForInStatement(node);
-                case 224 /* BreakStatement */:
+                case 224:
                     return visitBreakStatement(node);
-                case 223 /* ContinueStatement */:
+                case 223:
                     return visitContinueStatement(node);
-                case 225 /* ReturnStatement */:
+                case 225:
                     return visitReturnStatement(node);
                 default:
-                    if (node.transformFlags & 16777216 /* ContainsYield */) {
+                    if (node.transformFlags & 16777216) {
                         return visitJavaScriptContainingYield(node);
                     }
-                    else if (node.transformFlags & (512 /* ContainsGenerator */ | 33554432 /* ContainsHoistedDeclarationOrCompletion */)) {
+                    else if (node.transformFlags & (512 | 33554432)) {
                         return ts.visitEachChild(node, visitor, context);
                     }
                     else {
@@ -69137,66 +56286,41 @@ var ts;
                     }
             }
         }
-        /**
-         * Visits a node that contains a YieldExpression.
-         *
-         * @param node The node to visit.
-         */
         function visitJavaScriptContainingYield(node) {
             switch (node.kind) {
-                case 200 /* BinaryExpression */:
+                case 200:
                     return visitBinaryExpression(node);
-                case 201 /* ConditionalExpression */:
+                case 201:
                     return visitConditionalExpression(node);
-                case 203 /* YieldExpression */:
+                case 203:
                     return visitYieldExpression(node);
-                case 183 /* ArrayLiteralExpression */:
+                case 183:
                     return visitArrayLiteralExpression(node);
-                case 184 /* ObjectLiteralExpression */:
+                case 184:
                     return visitObjectLiteralExpression(node);
-                case 186 /* ElementAccessExpression */:
+                case 186:
                     return visitElementAccessExpression(node);
-                case 187 /* CallExpression */:
+                case 187:
                     return visitCallExpression(node);
-                case 188 /* NewExpression */:
+                case 188:
                     return visitNewExpression(node);
                 default:
                     return ts.visitEachChild(node, visitor, context);
             }
         }
-        /**
-         * Visits a generator function.
-         *
-         * @param node The node to visit.
-         */
         function visitGenerator(node) {
             switch (node.kind) {
-                case 234 /* FunctionDeclaration */:
+                case 234:
                     return visitFunctionDeclaration(node);
-                case 192 /* FunctionExpression */:
+                case 192:
                     return visitFunctionExpression(node);
                 default:
                     return ts.Debug.failBadSyntaxKind(node);
             }
         }
-        /**
-         * Visits a function declaration.
-         *
-         * This will be called when one of the following conditions are met:
-         * - The function declaration is a generator function.
-         * - The function declaration is contained within the body of a generator function.
-         *
-         * @param node The node to visit.
-         */
         function visitFunctionDeclaration(node) {
-            // Currently, we only support generators that were originally async functions.
             if (node.asteriskToken) {
-                node = ts.setOriginalNode(ts.setTextRange(ts.createFunctionDeclaration(
-                /*decorators*/ undefined, node.modifiers, 
-                /*asteriskToken*/ undefined, node.name, 
-                /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
-                /*type*/ undefined, transformGeneratorFunctionBody(node.body)), 
-                /*location*/ node), node);
+                node = ts.setOriginalNode(ts.setTextRange(ts.createFunctionDeclaration(undefined, node.modifiers, undefined, node.name, undefined, ts.visitParameterList(node.parameters, visitor, context), undefined, transformGeneratorFunctionBody(node.body)), node), node);
             }
             else {
                 var savedInGeneratorFunctionBody = inGeneratorFunctionBody;
@@ -69208,8 +56332,6 @@ var ts;
                 inStatementContainingYield = savedInStatementContainingYield;
             }
             if (inGeneratorFunctionBody) {
-                // Function declarations in a generator function body are hoisted
-                // to the top of the lexical scope and elided from the current statement.
                 hoistFunctionDeclaration(node);
                 return undefined;
             }
@@ -69217,24 +56339,9 @@ var ts;
                 return node;
             }
         }
-        /**
-         * Visits a function expression.
-         *
-         * This will be called when one of the following conditions are met:
-         * - The function expression is a generator function.
-         * - The function expression is contained within the body of a generator function.
-         *
-         * @param node The node to visit.
-         */
         function visitFunctionExpression(node) {
-            // Currently, we only support generators that were originally async functions.
             if (node.asteriskToken) {
-                node = ts.setOriginalNode(ts.setTextRange(ts.createFunctionExpression(
-                /*modifiers*/ undefined, 
-                /*asteriskToken*/ undefined, node.name, 
-                /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
-                /*type*/ undefined, transformGeneratorFunctionBody(node.body)), 
-                /*location*/ node), node);
+                node = ts.setOriginalNode(ts.setTextRange(ts.createFunctionExpression(undefined, undefined, node.name, undefined, ts.visitParameterList(node.parameters, visitor, context), undefined, transformGeneratorFunctionBody(node.body)), node), node);
             }
             else {
                 var savedInGeneratorFunctionBody = inGeneratorFunctionBody;
@@ -69247,14 +56354,6 @@ var ts;
             }
             return node;
         }
-        /**
-         * Visits a get or set accessor declaration.
-         *
-         * This will be called when one of the following conditions are met:
-         * - The accessor is contained within the body of a generator function.
-         *
-         * @param node The node to visit.
-         */
         function visitAccessorDeclaration(node) {
             var savedInGeneratorFunctionBody = inGeneratorFunctionBody;
             var savedInStatementContainingYield = inStatementContainingYield;
@@ -69265,13 +56364,7 @@ var ts;
             inStatementContainingYield = savedInStatementContainingYield;
             return node;
         }
-        /**
-         * Transforms the body of a generator function declaration.
-         *
-         * @param node The function body to transform.
-         */
         function transformGeneratorFunctionBody(body) {
-            // Save existing generator state
             var statements = [];
             var savedInGeneratorFunctionBody = inGeneratorFunctionBody;
             var savedInStatementContainingYield = inStatementContainingYield;
@@ -69286,7 +56379,6 @@ var ts;
             var savedOperationArguments = operationArguments;
             var savedOperationLocations = operationLocations;
             var savedState = state;
-            // Initialize generator state
             inGeneratorFunctionBody = true;
             inStatementContainingYield = false;
             blocks = undefined;
@@ -69299,15 +56391,13 @@ var ts;
             operations = undefined;
             operationArguments = undefined;
             operationLocations = undefined;
-            state = ts.createTempVariable(/*recordTempVariable*/ undefined);
-            // Build the generator
+            state = ts.createTempVariable(undefined);
             resumeLexicalEnvironment();
-            var statementOffset = ts.addPrologue(statements, body.statements, /*ensureUseStrict*/ false, visitor);
+            var statementOffset = ts.addPrologue(statements, body.statements, false, visitor);
             transformAndEmitStatements(body.statements, statementOffset);
             var buildResult = build();
             ts.prependStatements(statements, endLexicalEnvironment());
             statements.push(ts.createReturn(buildResult));
-            // Restore previous generator state
             inGeneratorFunctionBody = savedInGeneratorFunctionBody;
             inStatementContainingYield = savedInStatementContainingYield;
             blocks = savedBlocks;
@@ -69323,22 +56413,13 @@ var ts;
             state = savedState;
             return ts.setTextRange(ts.createBlock(statements, body.multiLine), body);
         }
-        /**
-         * Visits a variable statement.
-         *
-         * This will be called when one of the following conditions are met:
-         * - The variable statement is contained within the body of a generator function.
-         *
-         * @param node The node to visit.
-         */
         function visitVariableStatement(node) {
-            if (node.transformFlags & 16777216 /* ContainsYield */) {
+            if (node.transformFlags & 16777216) {
                 transformAndEmitVariableDeclarationList(node.declarationList);
                 return undefined;
             }
             else {
-                // Do not hoist custom prologues.
-                if (ts.getEmitFlags(node) & 1048576 /* CustomPrologue */) {
+                if (ts.getEmitFlags(node) & 1048576) {
                     return node;
                 }
                 for (var _i = 0, _a = node.declarationList.declarations; _i < _a.length; _i++) {
@@ -69352,78 +56433,46 @@ var ts;
                 return ts.setSourceMapRange(ts.createStatement(ts.inlineExpressions(ts.map(variables, transformInitializedVariable))), node);
             }
         }
-        /**
-         * Visits a binary expression.
-         *
-         * This will be called when one of the following conditions are met:
-         * - The node contains a YieldExpression.
-         *
-         * @param node The node to visit.
-         */
         function visitBinaryExpression(node) {
             var assoc = ts.getExpressionAssociativity(node);
             switch (assoc) {
-                case 0 /* Left */:
+                case 0:
                     return visitLeftAssociativeBinaryExpression(node);
-                case 1 /* Right */:
+                case 1:
                     return visitRightAssociativeBinaryExpression(node);
                 default:
                     return ts.Debug.assertNever(assoc);
             }
         }
         function isCompoundAssignment(kind) {
-            return kind >= 59 /* FirstCompoundAssignment */
-                && kind <= 70 /* LastCompoundAssignment */;
+            return kind >= 59
+                && kind <= 70;
         }
         function getOperatorForCompoundAssignment(kind) {
             switch (kind) {
-                case 59 /* PlusEqualsToken */: return 37 /* PlusToken */;
-                case 60 /* MinusEqualsToken */: return 38 /* MinusToken */;
-                case 61 /* AsteriskEqualsToken */: return 39 /* AsteriskToken */;
-                case 62 /* AsteriskAsteriskEqualsToken */: return 40 /* AsteriskAsteriskToken */;
-                case 63 /* SlashEqualsToken */: return 41 /* SlashToken */;
-                case 64 /* PercentEqualsToken */: return 42 /* PercentToken */;
-                case 65 /* LessThanLessThanEqualsToken */: return 45 /* LessThanLessThanToken */;
-                case 66 /* GreaterThanGreaterThanEqualsToken */: return 46 /* GreaterThanGreaterThanToken */;
-                case 67 /* GreaterThanGreaterThanGreaterThanEqualsToken */: return 47 /* GreaterThanGreaterThanGreaterThanToken */;
-                case 68 /* AmpersandEqualsToken */: return 48 /* AmpersandToken */;
-                case 69 /* BarEqualsToken */: return 49 /* BarToken */;
-                case 70 /* CaretEqualsToken */: return 50 /* CaretToken */;
-            }
-        }
-        /**
-         * Visits a right-associative binary expression containing `yield`.
-         *
-         * @param node The node to visit.
-         */
+                case 59: return 37;
+                case 60: return 38;
+                case 61: return 39;
+                case 62: return 40;
+                case 63: return 41;
+                case 64: return 42;
+                case 65: return 45;
+                case 66: return 46;
+                case 67: return 47;
+                case 68: return 48;
+                case 69: return 49;
+                case 70: return 50;
+            }
+        }
         function visitRightAssociativeBinaryExpression(node) {
             var left = node.left, right = node.right;
             if (containsYield(right)) {
                 var target = void 0;
                 switch (left.kind) {
-                    case 185 /* PropertyAccessExpression */:
-                        // [source]
-                        //      a.b = yield;
-                        //
-                        // [intermediate]
-                        //  .local _a
-                        //      _a = a;
-                        //  .yield resumeLabel
-                        //  .mark resumeLabel
-                        //      _a.b = %sent%;
+                    case 185:
                         target = ts.updatePropertyAccess(left, cacheExpression(ts.visitNode(left.expression, visitor, ts.isLeftHandSideExpression)), left.name);
                         break;
-                    case 186 /* ElementAccessExpression */:
-                        // [source]
-                        //      a[b] = yield;
-                        //
-                        // [intermediate]
-                        //  .local _a, _b
-                        //      _a = a;
-                        //      _b = b;
-                        //  .yield resumeLabel
-                        //  .mark resumeLabel
-                        //      _a[_b] = %sent%;
+                    case 186:
                         target = ts.updateElementAccess(left, cacheExpression(ts.visitNode(left.expression, visitor, ts.isLeftHandSideExpression)), cacheExpression(ts.visitNode(left.argumentExpression, visitor, ts.isExpression)));
                         break;
                     default:
@@ -69445,17 +56494,9 @@ var ts;
                 if (ts.isLogicalOperator(node.operatorToken.kind)) {
                     return visitLogicalBinaryExpression(node);
                 }
-                else if (node.operatorToken.kind === 26 /* CommaToken */) {
+                else if (node.operatorToken.kind === 26) {
                     return visitCommaExpression(node);
                 }
-                // [source]
-                //      a() + (yield) + c()
-                //
-                // [intermediate]
-                //  .local _a
-                //      _a = a();
-                //  .yield resumeLabel
-                //      _a + %sent% + c()
                 var clone_4 = ts.getMutableClone(node);
                 clone_4.left = cacheExpression(ts.visitNode(node.left, visitor, ts.isExpression));
                 clone_4.right = ts.visitNode(node.right, visitor, ts.isExpression);
@@ -69463,176 +56504,73 @@ var ts;
             }
             return ts.visitEachChild(node, visitor, context);
         }
-        /**
-         * Visits a logical binary expression containing `yield`.
-         *
-         * @param node A node to visit.
-         */
         function visitLogicalBinaryExpression(node) {
-            // Logical binary expressions (`&&` and `||`) are shortcutting expressions and need
-            // to be transformed as such:
-            //
-            // [source]
-            //      x = a() && yield;
-            //
-            // [intermediate]
-            //  .local _a
-            //      _a = a();
-            //  .brfalse resultLabel, (_a)
-            //  .yield resumeLabel
-            //  .mark resumeLabel
-            //      _a = %sent%;
-            //  .mark resultLabel
-            //      x = _a;
-            //
-            // [source]
-            //      x = a() || yield;
-            //
-            // [intermediate]
-            //  .local _a
-            //      _a = a();
-            //  .brtrue resultLabel, (_a)
-            //  .yield resumeLabel
-            //  .mark resumeLabel
-            //      _a = %sent%;
-            //  .mark resultLabel
-            //      x = _a;
             var resultLabel = defineLabel();
             var resultLocal = declareLocal();
-            emitAssignment(resultLocal, ts.visitNode(node.left, visitor, ts.isExpression), /*location*/ node.left);
-            if (node.operatorToken.kind === 53 /* AmpersandAmpersandToken */) {
-                // Logical `&&` shortcuts when the left-hand operand is falsey.
-                emitBreakWhenFalse(resultLabel, resultLocal, /*location*/ node.left);
+            emitAssignment(resultLocal, ts.visitNode(node.left, visitor, ts.isExpression), node.left);
+            if (node.operatorToken.kind === 53) {
+                emitBreakWhenFalse(resultLabel, resultLocal, node.left);
             }
             else {
-                // Logical `||` shortcuts when the left-hand operand is truthy.
-                emitBreakWhenTrue(resultLabel, resultLocal, /*location*/ node.left);
+                emitBreakWhenTrue(resultLabel, resultLocal, node.left);
             }
-            emitAssignment(resultLocal, ts.visitNode(node.right, visitor, ts.isExpression), /*location*/ node.right);
+            emitAssignment(resultLocal, ts.visitNode(node.right, visitor, ts.isExpression), node.right);
             markLabel(resultLabel);
             return resultLocal;
         }
-        /**
-         * Visits a comma expression containing `yield`.
-         *
-         * @param node The node to visit.
-         */
         function visitCommaExpression(node) {
-            // [source]
-            //      x = a(), yield, b();
-            //
-            // [intermediate]
-            //      a();
-            //  .yield resumeLabel
-            //  .mark resumeLabel
-            //      x = %sent%, b();
             var pendingExpressions = [];
             visit(node.left);
             visit(node.right);
             return ts.inlineExpressions(pendingExpressions);
             function visit(node) {
-                if (ts.isBinaryExpression(node) && node.operatorToken.kind === 26 /* CommaToken */) {
+                if (ts.isBinaryExpression(node) && node.operatorToken.kind === 26) {
                     visit(node.left);
                     visit(node.right);
                 }
                 else {
                     if (containsYield(node) && pendingExpressions.length > 0) {
-                        emitWorker(1 /* Statement */, [ts.createStatement(ts.inlineExpressions(pendingExpressions))]);
+                        emitWorker(1, [ts.createStatement(ts.inlineExpressions(pendingExpressions))]);
                         pendingExpressions = [];
                     }
                     pendingExpressions.push(ts.visitNode(node, visitor, ts.isExpression));
                 }
             }
         }
-        /**
-         * Visits a conditional expression containing `yield`.
-         *
-         * @param node The node to visit.
-         */
         function visitConditionalExpression(node) {
-            // [source]
-            //      x = a() ? yield : b();
-            //
-            // [intermediate]
-            //  .local _a
-            //  .brfalse whenFalseLabel, (a())
-            //  .yield resumeLabel
-            //  .mark resumeLabel
-            //      _a = %sent%;
-            //  .br resultLabel
-            //  .mark whenFalseLabel
-            //      _a = b();
-            //  .mark resultLabel
-            //      x = _a;
-            // We only need to perform a specific transformation if a `yield` expression exists
-            // in either the `whenTrue` or `whenFalse` branches.
-            // A `yield` in the condition will be handled by the normal visitor.
             if (containsYield(node.whenTrue) || containsYield(node.whenFalse)) {
                 var whenFalseLabel = defineLabel();
                 var resultLabel = defineLabel();
                 var resultLocal = declareLocal();
-                emitBreakWhenFalse(whenFalseLabel, ts.visitNode(node.condition, visitor, ts.isExpression), /*location*/ node.condition);
-                emitAssignment(resultLocal, ts.visitNode(node.whenTrue, visitor, ts.isExpression), /*location*/ node.whenTrue);
+                emitBreakWhenFalse(whenFalseLabel, ts.visitNode(node.condition, visitor, ts.isExpression), node.condition);
+                emitAssignment(resultLocal, ts.visitNode(node.whenTrue, visitor, ts.isExpression), node.whenTrue);
                 emitBreak(resultLabel);
                 markLabel(whenFalseLabel);
-                emitAssignment(resultLocal, ts.visitNode(node.whenFalse, visitor, ts.isExpression), /*location*/ node.whenFalse);
+                emitAssignment(resultLocal, ts.visitNode(node.whenFalse, visitor, ts.isExpression), node.whenFalse);
                 markLabel(resultLabel);
                 return resultLocal;
             }
             return ts.visitEachChild(node, visitor, context);
         }
-        /**
-         * Visits a `yield` expression.
-         *
-         * @param node The node to visit.
-         */
         function visitYieldExpression(node) {
-            // [source]
-            //      x = yield a();
-            //
-            // [intermediate]
-            //  .yield resumeLabel, (a())
-            //  .mark resumeLabel
-            //      x = %sent%;
             var resumeLabel = defineLabel();
             var expression = ts.visitNode(node.expression, visitor, ts.isExpression);
             if (node.asteriskToken) {
-                var iterator = (ts.getEmitFlags(node.expression) & 8388608 /* Iterator */) === 0
-                    ? ts.createValuesHelper(context, expression, /*location*/ node)
+                var iterator = (ts.getEmitFlags(node.expression) & 8388608) === 0
+                    ? ts.createValuesHelper(context, expression, node)
                     : expression;
-                emitYieldStar(iterator, /*location*/ node);
+                emitYieldStar(iterator, node);
             }
             else {
-                emitYield(expression, /*location*/ node);
+                emitYield(expression, node);
             }
             markLabel(resumeLabel);
-            return createGeneratorResume(/*location*/ node);
+            return createGeneratorResume(node);
         }
-        /**
-         * Visits an ArrayLiteralExpression that contains a YieldExpression.
-         *
-         * @param node The node to visit.
-         */
         function visitArrayLiteralExpression(node) {
-            return visitElements(node.elements, /*leadingElement*/ undefined, /*location*/ undefined, node.multiLine);
-        }
-        /**
-         * Visits an array of expressions containing one or more YieldExpression nodes
-         * and returns an expression for the resulting value.
-         *
-         * @param elements The elements to visit.
-         * @param multiLine Whether array literals created should be emitted on multiple lines.
-         */
+            return visitElements(node.elements, undefined, undefined, node.multiLine);
+        }
         function visitElements(elements, leadingElement, location, multiLine) {
-            // [source]
-            //      ar = [1, yield, 2];
-            //
-            // [intermediate]
-            //  .local _a
-            //      _a = [1];
-            //  .yield resumeLabel
-            //  .mark resumeLabel
-            //      ar = _a.concat([%sent%, 2]);
             var numInitialElements = countInitialNodesWithoutYield(elements);
             var temp;
             if (numInitialElements > 0) {
@@ -69663,23 +56601,6 @@ var ts;
             }
         }
         function visitObjectLiteralExpression(node) {
-            // [source]
-            //      o = {
-            //          a: 1,
-            //          b: yield,
-            //          c: 2
-            //      };
-            //
-            // [intermediate]
-            //  .local _a
-            //      _a = {
-            //          a: 1
-            //      };
-            //  .yield resumeLabel
-            //  .mark resumeLabel
-            //      o = (_a.b = %sent%,
-            //          _a.c = 2,
-            //          _a);
             var properties = node.properties;
             var multiLine = node.multiLine;
             var numInitialProperties = countInitialNodesWithoutYield(properties);
@@ -69704,22 +56625,8 @@ var ts;
                 return expressions;
             }
         }
-        /**
-         * Visits an ElementAccessExpression that contains a YieldExpression.
-         *
-         * @param node The node to visit.
-         */
         function visitElementAccessExpression(node) {
             if (containsYield(node.argumentExpression)) {
-                // [source]
-                //      a = x[yield];
-                //
-                // [intermediate]
-                //  .local _a
-                //      _a = x;
-                //  .yield resumeLabel
-                //  .mark resumeLabel
-                //      a = _a[%sent%]
                 var clone_5 = ts.getMutableClone(node);
                 clone_5.expression = cacheExpression(ts.visitNode(node.expression, visitor, ts.isLeftHandSideExpression));
                 clone_5.argumentExpression = ts.visitNode(node.argumentExpression, visitor, ts.isExpression);
@@ -69729,38 +56636,15 @@ var ts;
         }
         function visitCallExpression(node) {
             if (!ts.isImportCall(node) && ts.forEach(node.arguments, containsYield)) {
-                // [source]
-                //      a.b(1, yield, 2);
-                //
-                // [intermediate]
-                //  .local _a, _b, _c
-                //      _b = (_a = a).b;
-                //      _c = [1];
-                //  .yield resumeLabel
-                //  .mark resumeLabel
-                //      _b.apply(_a, _c.concat([%sent%, 2]));
-                var _a = ts.createCallBinding(node.expression, hoistVariableDeclaration, languageVersion, /*cacheIdentifiers*/ true), target = _a.target, thisArg = _a.thisArg;
-                return ts.setOriginalNode(ts.createFunctionApply(cacheExpression(ts.visitNode(target, visitor, ts.isLeftHandSideExpression)), thisArg, visitElements(node.arguments), 
-                /*location*/ node), node);
+                var _a = ts.createCallBinding(node.expression, hoistVariableDeclaration, languageVersion, true), target = _a.target, thisArg = _a.thisArg;
+                return ts.setOriginalNode(ts.createFunctionApply(cacheExpression(ts.visitNode(target, visitor, ts.isLeftHandSideExpression)), thisArg, visitElements(node.arguments), node), node);
             }
             return ts.visitEachChild(node, visitor, context);
         }
         function visitNewExpression(node) {
             if (ts.forEach(node.arguments, containsYield)) {
-                // [source]
-                //      new a.b(1, yield, 2);
-                //
-                // [intermediate]
-                //  .local _a, _b, _c
-                //      _b = (_a = a.b).bind;
-                //      _c = [1];
-                //  .yield resumeLabel
-                //  .mark resumeLabel
-                //      new (_b.apply(_a, _c.concat([%sent%, 2])));
                 var _a = ts.createCallBinding(ts.createPropertyAccess(node.expression, "bind"), hoistVariableDeclaration), target = _a.target, thisArg = _a.thisArg;
-                return ts.setOriginalNode(ts.setTextRange(ts.createNew(ts.createFunctionApply(cacheExpression(ts.visitNode(target, visitor, ts.isExpression)), thisArg, visitElements(node.arguments, 
-                /*leadingElement*/ ts.createVoidZero())), 
-                /*typeArguments*/ undefined, []), node), node);
+                return ts.setOriginalNode(ts.setTextRange(ts.createNew(ts.createFunctionApply(cacheExpression(ts.visitNode(target, visitor, ts.isExpression)), thisArg, visitElements(node.arguments, ts.createVoidZero())), undefined, []), node), node);
             }
             return ts.visitEachChild(node, visitor, context);
         }
@@ -69789,35 +56673,35 @@ var ts;
         }
         function transformAndEmitStatementWorker(node) {
             switch (node.kind) {
-                case 213 /* Block */:
+                case 213:
                     return transformAndEmitBlock(node);
-                case 216 /* ExpressionStatement */:
+                case 216:
                     return transformAndEmitExpressionStatement(node);
-                case 217 /* IfStatement */:
+                case 217:
                     return transformAndEmitIfStatement(node);
-                case 218 /* DoStatement */:
+                case 218:
                     return transformAndEmitDoStatement(node);
-                case 219 /* WhileStatement */:
+                case 219:
                     return transformAndEmitWhileStatement(node);
-                case 220 /* ForStatement */:
+                case 220:
                     return transformAndEmitForStatement(node);
-                case 221 /* ForInStatement */:
+                case 221:
                     return transformAndEmitForInStatement(node);
-                case 223 /* ContinueStatement */:
+                case 223:
                     return transformAndEmitContinueStatement(node);
-                case 224 /* BreakStatement */:
+                case 224:
                     return transformAndEmitBreakStatement(node);
-                case 225 /* ReturnStatement */:
+                case 225:
                     return transformAndEmitReturnStatement(node);
-                case 226 /* WithStatement */:
+                case 226:
                     return transformAndEmitWithStatement(node);
-                case 227 /* SwitchStatement */:
+                case 227:
                     return transformAndEmitSwitchStatement(node);
-                case 228 /* LabeledStatement */:
+                case 228:
                     return transformAndEmitLabeledStatement(node);
-                case 229 /* ThrowStatement */:
+                case 229:
                     return transformAndEmitThrowStatement(node);
-                case 230 /* TryStatement */:
+                case 230:
                     return transformAndEmitTryStatement(node);
                 default:
                     return emitStatement(ts.visitNode(node, visitor, ts.isStatement));
@@ -69866,23 +56750,10 @@ var ts;
         }
         function transformAndEmitIfStatement(node) {
             if (containsYield(node)) {
-                // [source]
-                //      if (x)
-                //          /*thenStatement*/
-                //      else
-                //          /*elseStatement*/
-                //
-                // [intermediate]
-                //  .brfalse elseLabel, (x)
-                //      /*thenStatement*/
-                //  .br endLabel
-                //  .mark elseLabel
-                //      /*elseStatement*/
-                //  .mark endLabel
                 if (containsYield(node.thenStatement) || containsYield(node.elseStatement)) {
                     var endLabel = defineLabel();
                     var elseLabel = node.elseStatement ? defineLabel() : undefined;
-                    emitBreakWhenFalse(node.elseStatement ? elseLabel : endLabel, ts.visitNode(node.expression, visitor, ts.isExpression), /*location*/ node.expression);
+                    emitBreakWhenFalse(node.elseStatement ? elseLabel : endLabel, ts.visitNode(node.expression, visitor, ts.isExpression), node.expression);
                     transformAndEmitEmbeddedStatement(node.thenStatement);
                     if (node.elseStatement) {
                         emitBreak(endLabel);
@@ -69901,23 +56772,9 @@ var ts;
         }
         function transformAndEmitDoStatement(node) {
             if (containsYield(node)) {
-                // [source]
-                //      do {
-                //          /*body*/
-                //      }
-                //      while (i < 10);
-                //
-                // [intermediate]
-                //  .loop conditionLabel, endLabel
-                //  .mark loopLabel
-                //      /*body*/
-                //  .mark conditionLabel
-                //  .brtrue loopLabel, (i < 10)
-                //  .endloop
-                //  .mark endLabel
                 var conditionLabel = defineLabel();
                 var loopLabel = defineLabel();
-                beginLoopBlock(/*continueLabel*/ conditionLabel);
+                beginLoopBlock(conditionLabel);
                 markLabel(loopLabel);
                 transformAndEmitEmbeddedStatement(node.statement);
                 markLabel(conditionLabel);
@@ -69941,19 +56798,6 @@ var ts;
         }
         function transformAndEmitWhileStatement(node) {
             if (containsYield(node)) {
-                // [source]
-                //      while (i < 10) {
-                //          /*body*/
-                //      }
-                //
-                // [intermediate]
-                //  .loop loopLabel, endLabel
-                //  .mark loopLabel
-                //  .brfalse endLabel, (i < 10)
-                //      /*body*/
-                //  .br loopLabel
-                //  .endloop
-                //  .mark endLabel
                 var loopLabel = defineLabel();
                 var endLabel = beginLoopBlock(loopLabel);
                 markLabel(loopLabel);
@@ -69979,23 +56823,6 @@ var ts;
         }
         function transformAndEmitForStatement(node) {
             if (containsYield(node)) {
-                // [source]
-                //      for (var i = 0; i < 10; i++) {
-                //          /*body*/
-                //      }
-                //
-                // [intermediate]
-                //  .local i
-                //      i = 0;
-                //  .loop incrementLabel, endLoopLabel
-                //  .mark conditionLabel
-                //  .brfalse endLoopLabel, (i < 10)
-                //      /*body*/
-                //  .mark incrementLabel
-                //      i++;
-                //  .br conditionLabel
-                //  .endloop
-                //  .mark endLoopLabel
                 var conditionLabel = defineLabel();
                 var incrementLabel = defineLabel();
                 var endLabel = beginLoopBlock(incrementLabel);
@@ -70048,36 +56875,14 @@ var ts;
             return node;
         }
         function transformAndEmitForInStatement(node) {
-            // TODO(rbuckton): Source map locations
             if (containsYield(node)) {
-                // [source]
-                //      for (var p in o) {
-                //          /*body*/
-                //      }
-                //
-                // [intermediate]
-                //  .local _a, _b, _i
-                //      _a = [];
-                //      for (_b in o) _a.push(_b);
-                //      _i = 0;
-                //  .loop incrementLabel, endLoopLabel
-                //  .mark conditionLabel
-                //  .brfalse endLoopLabel, (_i < _a.length)
-                //      p = _a[_i];
-                //      /*body*/
-                //  .mark incrementLabel
-                //      _b++;
-                //  .br conditionLabel
-                //  .endloop
-                //  .mark endLoopLabel
-                var keysArray = declareLocal(); // _a
-                var key = declareLocal(); // _b
-                var keysIndex = ts.createLoopVariable(); // _i
+                var keysArray = declareLocal();
+                var key = declareLocal();
+                var keysIndex = ts.createLoopVariable();
                 var initializer = node.initializer;
                 hoistVariableDeclaration(keysIndex);
                 emitAssignment(keysArray, ts.createArrayLiteral());
-                emitStatement(ts.createForIn(key, ts.visitNode(node.expression, visitor, ts.isExpression), ts.createStatement(ts.createCall(ts.createPropertyAccess(keysArray, "push"), 
-                /*typeArguments*/ undefined, [key]))));
+                emitStatement(ts.createForIn(key, ts.visitNode(node.expression, visitor, ts.isExpression), ts.createStatement(ts.createCall(ts.createPropertyAccess(keysArray, "push"), undefined, [key]))));
                 emitAssignment(keysIndex, ts.createLiteral(0));
                 var conditionLabel = defineLabel();
                 var incrementLabel = defineLabel();
@@ -70108,18 +56913,6 @@ var ts;
             }
         }
         function visitForInStatement(node) {
-            // [source]
-            //      for (var x in a) {
-            //          /*body*/
-            //      }
-            //
-            // [intermediate]
-            //  .local x
-            //  .loop
-            //      for (x in a) {
-            //          /*body*/
-            //      }
-            //  .endloop
             if (inStatementContainingYield) {
                 beginScriptLoopBlock();
             }
@@ -70142,10 +56935,9 @@ var ts;
         function transformAndEmitContinueStatement(node) {
             var label = findContinueTarget(node.label ? ts.idText(node.label) : undefined);
             if (label > 0) {
-                emitBreak(label, /*location*/ node);
+                emitBreak(label, node);
             }
             else {
-                // invalid continue without a containing loop. Leave the node as is, per #17875.
                 emitStatement(node);
             }
         }
@@ -70153,7 +56945,7 @@ var ts;
             if (inStatementContainingYield) {
                 var label = findContinueTarget(node.label && ts.idText(node.label));
                 if (label > 0) {
-                    return createInlineBreak(label, /*location*/ node);
+                    return createInlineBreak(label, node);
                 }
             }
             return ts.visitEachChild(node, visitor, context);
@@ -70161,10 +56953,9 @@ var ts;
         function transformAndEmitBreakStatement(node) {
             var label = findBreakTarget(node.label ? ts.idText(node.label) : undefined);
             if (label > 0) {
-                emitBreak(label, /*location*/ node);
+                emitBreak(label, node);
             }
             else {
-                // invalid break without a containing loop, switch, or labeled statement. Leave the node as is, per #17875.
                 emitStatement(node);
             }
         }
@@ -70172,30 +56963,19 @@ var ts;
             if (inStatementContainingYield) {
                 var label = findBreakTarget(node.label && ts.idText(node.label));
                 if (label > 0) {
-                    return createInlineBreak(label, /*location*/ node);
+                    return createInlineBreak(label, node);
                 }
             }
             return ts.visitEachChild(node, visitor, context);
         }
         function transformAndEmitReturnStatement(node) {
-            emitReturn(ts.visitNode(node.expression, visitor, ts.isExpression), 
-            /*location*/ node);
+            emitReturn(ts.visitNode(node.expression, visitor, ts.isExpression), node);
         }
         function visitReturnStatement(node) {
-            return createInlineReturn(ts.visitNode(node.expression, visitor, ts.isExpression), 
-            /*location*/ node);
+            return createInlineReturn(ts.visitNode(node.expression, visitor, ts.isExpression), node);
         }
         function transformAndEmitWithStatement(node) {
             if (containsYield(node)) {
-                // [source]
-                //      with (x) {
-                //          /*body*/
-                //      }
-                //
-                // [intermediate]
-                //  .with (x)
-                //      /*body*/
-                //  .endwith
                 beginWithBlock(cacheExpression(ts.visitNode(node.expression, visitor, ts.isExpression)));
                 transformAndEmitEmbeddedStatement(node.statement);
                 endWithBlock();
@@ -70206,66 +56986,31 @@ var ts;
         }
         function transformAndEmitSwitchStatement(node) {
             if (containsYield(node.caseBlock)) {
-                // [source]
-                //      switch (x) {
-                //          case a:
-                //              /*caseStatements*/
-                //          case b:
-                //              /*caseStatements*/
-                //          default:
-                //              /*defaultStatements*/
-                //      }
-                //
-                // [intermediate]
-                //  .local _a
-                //  .switch endLabel
-                //      _a = x;
-                //      switch (_a) {
-                //          case a:
-                //  .br clauseLabels[0]
-                //      }
-                //      switch (_a) {
-                //          case b:
-                //  .br clauseLabels[1]
-                //      }
-                //  .br clauseLabels[2]
-                //  .mark clauseLabels[0]
-                //      /*caseStatements*/
-                //  .mark clauseLabels[1]
-                //      /*caseStatements*/
-                //  .mark clauseLabels[2]
-                //      /*caseStatements*/
-                //  .endswitch
-                //  .mark endLabel
                 var caseBlock = node.caseBlock;
                 var numClauses = caseBlock.clauses.length;
                 var endLabel = beginSwitchBlock();
                 var expression = cacheExpression(ts.visitNode(node.expression, visitor, ts.isExpression));
-                // Create labels for each clause and find the index of the first default clause.
                 var clauseLabels = [];
                 var defaultClauseIndex = -1;
                 for (var i = 0; i < numClauses; i++) {
                     var clause = caseBlock.clauses[i];
                     clauseLabels.push(defineLabel());
-                    if (clause.kind === 267 /* DefaultClause */ && defaultClauseIndex === -1) {
+                    if (clause.kind === 267 && defaultClauseIndex === -1) {
                         defaultClauseIndex = i;
                     }
                 }
-                // Emit switch statements for each run of case clauses either from the first case
-                // clause or the next case clause with a `yield` in its expression, up to the next
-                // case clause with a `yield` in its expression.
                 var clausesWritten = 0;
                 var pendingClauses = [];
                 while (clausesWritten < numClauses) {
                     var defaultClausesSkipped = 0;
                     for (var i = clausesWritten; i < numClauses; i++) {
                         var clause = caseBlock.clauses[i];
-                        if (clause.kind === 266 /* CaseClause */) {
+                        if (clause.kind === 266) {
                             if (containsYield(clause.expression) && pendingClauses.length > 0) {
                                 break;
                             }
                             pendingClauses.push(ts.createCaseClause(ts.visitNode(clause.expression, visitor, ts.isExpression), [
-                                createInlineBreak(clauseLabels[i], /*location*/ clause.expression)
+                                createInlineBreak(clauseLabels[i], clause.expression)
                             ]));
                         }
                         else {
@@ -70310,16 +57055,6 @@ var ts;
         }
         function transformAndEmitLabeledStatement(node) {
             if (containsYield(node)) {
-                // [source]
-                //      x: {
-                //          /*body*/
-                //      }
-                //
-                // [intermediate]
-                //  .labeled "x", endLabel
-                //      /*body*/
-                //  .endlabeled
-                //  .mark endLabel
                 beginLabeledBlock(ts.idText(node.label));
                 transformAndEmitEmbeddedStatement(node.statement);
                 endLabeledBlock();
@@ -70339,44 +57074,14 @@ var ts;
             return node;
         }
         function transformAndEmitThrowStatement(node) {
-            emitThrow(ts.visitNode(node.expression, visitor, ts.isExpression), 
-            /*location*/ node);
+            emitThrow(ts.visitNode(node.expression, visitor, ts.isExpression), node);
         }
         function transformAndEmitTryStatement(node) {
             if (containsYield(node)) {
-                // [source]
-                //      try {
-                //          /*tryBlock*/
-                //      }
-                //      catch (e) {
-                //          /*catchBlock*/
-                //      }
-                //      finally {
-                //          /*finallyBlock*/
-                //      }
-                //
-                // [intermediate]
-                //  .local _a
-                //  .try tryLabel, catchLabel, finallyLabel, endLabel
-                //  .mark tryLabel
-                //  .nop
-                //      /*tryBlock*/
-                //  .br endLabel
-                //  .catch
-                //  .mark catchLabel
-                //      _a = %error%;
-                //      /*catchBlock*/
-                //  .br endLabel
-                //  .finally
-                //  .mark finallyLabel
-                //      /*finallyBlock*/
-                //  .endfinally
-                //  .endtry
-                //  .mark endLabel
                 beginExceptionBlock();
                 transformAndEmitEmbeddedStatement(node.tryBlock);
                 if (node.catchClause) {
-                    beginCatchBlock(node.catchClause.variableDeclaration); // TODO: GH#18217
+                    beginCatchBlock(node.catchClause.variableDeclaration);
                     transformAndEmitEmbeddedStatement(node.catchClause.block);
                 }
                 if (node.finallyBlock) {
@@ -70390,7 +57095,7 @@ var ts;
             }
         }
         function containsYield(node) {
-            return !!node && (node.transformFlags & 16777216 /* ContainsYield */) !== 0;
+            return !!node && (node.transformFlags & 16777216) !== 0;
         }
         function countInitialNodesWithoutYield(nodes) {
             var numNodes = nodes.length;
@@ -70403,7 +57108,7 @@ var ts;
         }
         function onSubstituteNode(hint, node) {
             node = previousOnSubstituteNode(hint, node);
-            if (hint === 1 /* Expression */) {
+            if (hint === 1) {
                 return substituteExpression(node);
             }
             return node;
@@ -70434,23 +57139,20 @@ var ts;
         }
         function cacheExpression(node) {
             var temp;
-            if (ts.isGeneratedIdentifier(node) || ts.getEmitFlags(node) & 4096 /* HelperName */) {
+            if (ts.isGeneratedIdentifier(node) || ts.getEmitFlags(node) & 4096) {
                 return node;
             }
             temp = ts.createTempVariable(hoistVariableDeclaration);
-            emitAssignment(temp, node, /*location*/ node);
+            emitAssignment(temp, node, node);
             return temp;
         }
         function declareLocal(name) {
             var temp = name
                 ? ts.createUniqueName(name)
-                : ts.createTempVariable(/*recordTempVariable*/ undefined);
+                : ts.createTempVariable(undefined);
             hoistVariableDeclaration(temp);
             return temp;
         }
-        /**
-         * Defines a label, uses as the target of a Break operation.
-         */
         function defineLabel() {
             if (!labelOffsets) {
                 labelOffsets = [];
@@ -70460,18 +57162,10 @@ var ts;
             labelOffsets[label] = -1;
             return label;
         }
-        /**
-         * Marks the current operation with the specified label.
-         */
         function markLabel(label) {
             ts.Debug.assert(labelOffsets !== undefined, "No labels were defined.");
             labelOffsets[label] = operations ? operations.length : 0;
         }
-        /**
-         * Begins a block operation (With, Break/Continue, Try/Catch/Finally)
-         *
-         * @param block Information about the block.
-         */
         function beginBlock(block) {
             if (!blocks) {
                 blocks = [];
@@ -70480,87 +57174,61 @@ var ts;
                 blockStack = [];
             }
             var index = blockActions.length;
-            blockActions[index] = 0 /* Open */;
+            blockActions[index] = 0;
             blockOffsets[index] = operations ? operations.length : 0;
             blocks[index] = block;
             blockStack.push(block);
             return index;
         }
-        /**
-         * Ends the current block operation.
-         */
         function endBlock() {
             var block = peekBlock();
             if (block === undefined)
                 return ts.Debug.fail("beginBlock was never called.");
             var index = blockActions.length;
-            blockActions[index] = 1 /* Close */;
+            blockActions[index] = 1;
             blockOffsets[index] = operations ? operations.length : 0;
             blocks[index] = block;
             blockStack.pop();
             return block;
         }
-        /**
-         * Gets the current open block.
-         */
         function peekBlock() {
             return ts.lastOrUndefined(blockStack);
         }
-        /**
-         * Gets the kind of the current open block.
-         */
         function peekBlockKind() {
             var block = peekBlock();
             return block && block.kind;
         }
-        /**
-         * Begins a code block for a generated `with` statement.
-         *
-         * @param expression An identifier representing expression for the `with` block.
-         */
         function beginWithBlock(expression) {
             var startLabel = defineLabel();
             var endLabel = defineLabel();
             markLabel(startLabel);
             beginBlock({
-                kind: 1 /* With */,
+                kind: 1,
                 expression: expression,
                 startLabel: startLabel,
                 endLabel: endLabel
             });
         }
-        /**
-         * Ends a code block for a generated `with` statement.
-         */
         function endWithBlock() {
-            ts.Debug.assert(peekBlockKind() === 1 /* With */);
+            ts.Debug.assert(peekBlockKind() === 1);
             var block = endBlock();
             markLabel(block.endLabel);
         }
-        /**
-         * Begins a code block for a generated `try` statement.
-         */
         function beginExceptionBlock() {
             var startLabel = defineLabel();
             var endLabel = defineLabel();
             markLabel(startLabel);
             beginBlock({
-                kind: 0 /* Exception */,
-                state: 0 /* Try */,
+                kind: 0,
+                state: 0,
                 startLabel: startLabel,
                 endLabel: endLabel
             });
             emitNop();
             return endLabel;
         }
-        /**
-         * Enters the `catch` clause of a generated `try` statement.
-         *
-         * @param variable The catch variable.
-         */
         function beginCatchBlock(variable) {
-            ts.Debug.assert(peekBlockKind() === 0 /* Exception */);
-            // generated identifiers should already be unique within a file
+            ts.Debug.assert(peekBlockKind() === 0);
             var name;
             if (ts.isGeneratedIdentifier(variable.name)) {
                 name = variable.name;
@@ -70572,45 +57240,39 @@ var ts;
                 if (!renamedCatchVariables) {
                     renamedCatchVariables = ts.createMap();
                     renamedCatchVariableDeclarations = [];
-                    context.enableSubstitution(71 /* Identifier */);
+                    context.enableSubstitution(71);
                 }
                 renamedCatchVariables.set(text, true);
                 renamedCatchVariableDeclarations[ts.getOriginalNodeId(variable)] = name;
             }
             var exception = peekBlock();
-            ts.Debug.assert(exception.state < 1 /* Catch */);
+            ts.Debug.assert(exception.state < 1);
             var endLabel = exception.endLabel;
             emitBreak(endLabel);
             var catchLabel = defineLabel();
             markLabel(catchLabel);
-            exception.state = 1 /* Catch */;
+            exception.state = 1;
             exception.catchVariable = name;
             exception.catchLabel = catchLabel;
-            emitAssignment(name, ts.createCall(ts.createPropertyAccess(state, "sent"), /*typeArguments*/ undefined, []));
+            emitAssignment(name, ts.createCall(ts.createPropertyAccess(state, "sent"), undefined, []));
             emitNop();
         }
-        /**
-         * Enters the `finally` block of a generated `try` statement.
-         */
         function beginFinallyBlock() {
-            ts.Debug.assert(peekBlockKind() === 0 /* Exception */);
+            ts.Debug.assert(peekBlockKind() === 0);
             var exception = peekBlock();
-            ts.Debug.assert(exception.state < 2 /* Finally */);
+            ts.Debug.assert(exception.state < 2);
             var endLabel = exception.endLabel;
             emitBreak(endLabel);
             var finallyLabel = defineLabel();
             markLabel(finallyLabel);
-            exception.state = 2 /* Finally */;
+            exception.state = 2;
             exception.finallyLabel = finallyLabel;
         }
-        /**
-         * Ends the code block for a generated `try` statement.
-         */
         function endExceptionBlock() {
-            ts.Debug.assert(peekBlockKind() === 0 /* Exception */);
+            ts.Debug.assert(peekBlockKind() === 0);
             var exception = endBlock();
             var state = exception.state;
-            if (state < 2 /* Finally */) {
+            if (state < 2) {
                 emitBreak(exception.endLabel);
             }
             else {
@@ -70618,83 +57280,52 @@ var ts;
             }
             markLabel(exception.endLabel);
             emitNop();
-            exception.state = 3 /* Done */;
-        }
-        /**
-         * Begins a code block that supports `break` or `continue` statements that are defined in
-         * the source tree and not from generated code.
-         *
-         * @param labelText Names from containing labeled statements.
-         */
+            exception.state = 3;
+        }
         function beginScriptLoopBlock() {
             beginBlock({
-                kind: 3 /* Loop */,
+                kind: 3,
                 isScript: true,
                 breakLabel: -1,
                 continueLabel: -1
             });
         }
-        /**
-         * Begins a code block that supports `break` or `continue` statements that are defined in
-         * generated code. Returns a label used to mark the operation to which to jump when a
-         * `break` statement targets this block.
-         *
-         * @param continueLabel A Label used to mark the operation to which to jump when a
-         *                      `continue` statement targets this block.
-         */
         function beginLoopBlock(continueLabel) {
             var breakLabel = defineLabel();
             beginBlock({
-                kind: 3 /* Loop */,
+                kind: 3,
                 isScript: false,
                 breakLabel: breakLabel,
                 continueLabel: continueLabel,
             });
             return breakLabel;
         }
-        /**
-         * Ends a code block that supports `break` or `continue` statements that are defined in
-         * generated code or in the source tree.
-         */
         function endLoopBlock() {
-            ts.Debug.assert(peekBlockKind() === 3 /* Loop */);
+            ts.Debug.assert(peekBlockKind() === 3);
             var block = endBlock();
             var breakLabel = block.breakLabel;
             if (!block.isScript) {
                 markLabel(breakLabel);
             }
         }
-        /**
-         * Begins a code block that supports `break` statements that are defined in the source
-         * tree and not from generated code.
-         *
-         */
         function beginScriptSwitchBlock() {
             beginBlock({
-                kind: 2 /* Switch */,
+                kind: 2,
                 isScript: true,
                 breakLabel: -1
             });
         }
-        /**
-         * Begins a code block that supports `break` statements that are defined in generated code.
-         * Returns a label used to mark the operation to which to jump when a `break` statement
-         * targets this block.
-         */
         function beginSwitchBlock() {
             var breakLabel = defineLabel();
             beginBlock({
-                kind: 2 /* Switch */,
+                kind: 2,
                 isScript: false,
                 breakLabel: breakLabel,
             });
             return breakLabel;
         }
-        /**
-         * Ends a code block that supports `break` statements that are defined in generated code.
-         */
         function endSwitchBlock() {
-            ts.Debug.assert(peekBlockKind() === 2 /* Switch */);
+            ts.Debug.assert(peekBlockKind() === 2);
             var block = endBlock();
             var breakLabel = block.breakLabel;
             if (!block.isScript) {
@@ -70703,7 +57334,7 @@ var ts;
         }
         function beginScriptLabeledBlock(labelText) {
             beginBlock({
-                kind: 4 /* Labeled */,
+                kind: 4,
                 isScript: true,
                 labelText: labelText,
                 breakLabel: -1
@@ -70712,43 +57343,28 @@ var ts;
         function beginLabeledBlock(labelText) {
             var breakLabel = defineLabel();
             beginBlock({
-                kind: 4 /* Labeled */,
+                kind: 4,
                 isScript: false,
                 labelText: labelText,
                 breakLabel: breakLabel
             });
         }
         function endLabeledBlock() {
-            ts.Debug.assert(peekBlockKind() === 4 /* Labeled */);
+            ts.Debug.assert(peekBlockKind() === 4);
             var block = endBlock();
             if (!block.isScript) {
                 markLabel(block.breakLabel);
             }
         }
-        /**
-         * Indicates whether the provided block supports `break` statements.
-         *
-         * @param block A code block.
-         */
         function supportsUnlabeledBreak(block) {
-            return block.kind === 2 /* Switch */
-                || block.kind === 3 /* Loop */;
-        }
-        /**
-         * Indicates whether the provided block supports `break` statements with labels.
-         *
-         * @param block A code block.
-         */
+            return block.kind === 2
+                || block.kind === 3;
+        }
         function supportsLabeledBreakOrContinue(block) {
-            return block.kind === 4 /* Labeled */;
+            return block.kind === 4;
         }
-        /**
-         * Indicates whether the provided block supports `continue` statements.
-         *
-         * @param block A code block.
-         */
         function supportsUnlabeledContinue(block) {
-            return block.kind === 3 /* Loop */;
+            return block.kind === 3;
         }
         function hasImmediateContainingLabeledBlock(labelText, start) {
             for (var j = start; j >= 0; j--) {
@@ -70764,11 +57380,6 @@ var ts;
             }
             return false;
         }
-        /**
-         * Finds the label that is the target for a `break` statement.
-         *
-         * @param labelText An optional name of a containing labeled statement.
-         */
         function findBreakTarget(labelText) {
             if (blockStack) {
                 if (labelText) {
@@ -70793,11 +57404,6 @@ var ts;
             }
             return 0;
         }
-        /**
-         * Finds the label that is the target for a `continue` statement.
-         *
-         * @param labelText An optional name of a containing labeled statement.
-         */
         function findContinueTarget(labelText) {
             if (blockStack) {
                 if (labelText) {
@@ -70819,11 +57425,6 @@ var ts;
             }
             return 0;
         }
-        /**
-         * Creates an expression that can be used to indicate the value for a label.
-         *
-         * @param label A label.
-         */
         function createLabel(label) {
             if (label !== undefined && label > 0) {
                 if (labelExpressions === undefined) {
@@ -70840,153 +57441,64 @@ var ts;
             }
             return ts.createOmittedExpression();
         }
-        /**
-         * Creates a numeric literal for the provided instruction.
-         */
         function createInstruction(instruction) {
             var literal = ts.createLiteral(instruction);
-            ts.addSyntheticTrailingComment(literal, 3 /* MultiLineCommentTrivia */, getInstructionName(instruction));
+            ts.addSyntheticTrailingComment(literal, 3, getInstructionName(instruction));
             return literal;
         }
-        /**
-         * Creates a statement that can be used indicate a Break operation to the provided label.
-         *
-         * @param label A label.
-         * @param location An optional source map location for the statement.
-         */
         function createInlineBreak(label, location) {
             ts.Debug.assertLessThan(0, label, "Invalid label");
             return ts.setTextRange(ts.createReturn(ts.createArrayLiteral([
-                createInstruction(3 /* Break */),
+                createInstruction(3),
                 createLabel(label)
             ])), location);
         }
-        /**
-         * Creates a statement that can be used indicate a Return operation.
-         *
-         * @param expression The expression for the return statement.
-         * @param location An optional source map location for the statement.
-         */
         function createInlineReturn(expression, location) {
             return ts.setTextRange(ts.createReturn(ts.createArrayLiteral(expression
-                ? [createInstruction(2 /* Return */), expression]
-                : [createInstruction(2 /* Return */)])), location);
+                ? [createInstruction(2), expression]
+                : [createInstruction(2)])), location);
         }
-        /**
-         * Creates an expression that can be used to resume from a Yield operation.
-         */
         function createGeneratorResume(location) {
-            return ts.setTextRange(ts.createCall(ts.createPropertyAccess(state, "sent"), 
-            /*typeArguments*/ undefined, []), location);
+            return ts.setTextRange(ts.createCall(ts.createPropertyAccess(state, "sent"), undefined, []), location);
         }
-        /**
-         * Emits an empty instruction.
-         */
         function emitNop() {
-            emitWorker(0 /* Nop */);
+            emitWorker(0);
         }
-        /**
-         * Emits a Statement.
-         *
-         * @param node A statement.
-         */
         function emitStatement(node) {
             if (node) {
-                emitWorker(1 /* Statement */, [node]);
+                emitWorker(1, [node]);
             }
             else {
                 emitNop();
             }
         }
-        /**
-         * Emits an Assignment operation.
-         *
-         * @param left The left-hand side of the assignment.
-         * @param right The right-hand side of the assignment.
-         * @param location An optional source map location for the assignment.
-         */
         function emitAssignment(left, right, location) {
-            emitWorker(2 /* Assign */, [left, right], location);
-        }
-        /**
-         * Emits a Break operation to the specified label.
-         *
-         * @param label A label.
-         * @param location An optional source map location for the assignment.
-         */
+            emitWorker(2, [left, right], location);
+        }
         function emitBreak(label, location) {
-            emitWorker(3 /* Break */, [label], location);
-        }
-        /**
-         * Emits a Break operation to the specified label when a condition evaluates to a truthy
-         * value at runtime.
-         *
-         * @param label A label.
-         * @param condition The condition.
-         * @param location An optional source map location for the assignment.
-         */
+            emitWorker(3, [label], location);
+        }
         function emitBreakWhenTrue(label, condition, location) {
-            emitWorker(4 /* BreakWhenTrue */, [label, condition], location);
-        }
-        /**
-         * Emits a Break to the specified label when a condition evaluates to a falsey value at
-         * runtime.
-         *
-         * @param label A label.
-         * @param condition The condition.
-         * @param location An optional source map location for the assignment.
-         */
+            emitWorker(4, [label, condition], location);
+        }
         function emitBreakWhenFalse(label, condition, location) {
-            emitWorker(5 /* BreakWhenFalse */, [label, condition], location);
-        }
-        /**
-         * Emits a YieldStar operation for the provided expression.
-         *
-         * @param expression An optional value for the yield operation.
-         * @param location An optional source map location for the assignment.
-         */
+            emitWorker(5, [label, condition], location);
+        }
         function emitYieldStar(expression, location) {
-            emitWorker(7 /* YieldStar */, [expression], location);
-        }
-        /**
-         * Emits a Yield operation for the provided expression.
-         *
-         * @param expression An optional value for the yield operation.
-         * @param location An optional source map location for the assignment.
-         */
+            emitWorker(7, [expression], location);
+        }
         function emitYield(expression, location) {
-            emitWorker(6 /* Yield */, [expression], location);
-        }
-        /**
-         * Emits a Return operation for the provided expression.
-         *
-         * @param expression An optional value for the operation.
-         * @param location An optional source map location for the assignment.
-         */
+            emitWorker(6, [expression], location);
+        }
         function emitReturn(expression, location) {
-            emitWorker(8 /* Return */, [expression], location);
-        }
-        /**
-         * Emits a Throw operation for the provided expression.
-         *
-         * @param expression A value for the operation.
-         * @param location An optional source map location for the assignment.
-         */
+            emitWorker(8, [expression], location);
+        }
         function emitThrow(expression, location) {
-            emitWorker(9 /* Throw */, [expression], location);
+            emitWorker(9, [expression], location);
         }
-        /**
-         * Emits an Endfinally operation. This is used to handle `finally` block semantics.
-         */
         function emitEndfinally() {
-            emitWorker(10 /* Endfinally */);
-        }
-        /**
-         * Emits an operation.
-         *
-         * @param code The OpCode for the operation.
-         * @param args The optional arguments for the operation.
-         */
+            emitWorker(10);
+        }
         function emitWorker(code, args, location) {
             if (operations === undefined) {
                 operations = [];
@@ -70994,7 +57506,6 @@ var ts;
                 operationLocations = [];
             }
             if (labelOffsets === undefined) {
-                // mark entry point
                 markLabel(defineLabel());
             }
             var operationIndex = operations.length;
@@ -71002,9 +57513,6 @@ var ts;
             operationArguments[operationIndex] = args;
             operationLocations[operationIndex] = location;
         }
-        /**
-         * Builds the generator function body.
-         */
         function build() {
             blockIndex = 0;
             labelNumber = 0;
@@ -71017,17 +57525,8 @@ var ts;
             currentExceptionBlock = undefined;
             withBlockStack = undefined;
             var buildResult = buildStatements();
-            return createGeneratorHelper(context, ts.setEmitFlags(ts.createFunctionExpression(
-            /*modifiers*/ undefined, 
-            /*asteriskToken*/ undefined, 
-            /*name*/ undefined, 
-            /*typeParameters*/ undefined, [ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, state)], 
-            /*type*/ undefined, ts.createBlock(buildResult, 
-            /*multiLine*/ buildResult.length > 0)), 524288 /* ReuseTempVariableScope */));
-        }
-        /**
-         * Builds the statements for the generator function body.
-         */
+            return createGeneratorHelper(context, ts.setEmitFlags(ts.createFunctionExpression(undefined, undefined, undefined, undefined, [ts.createParameter(undefined, undefined, undefined, state)], undefined, ts.createBlock(buildResult, buildResult.length > 0)), 524288));
+        }
         function buildStatements() {
             if (operations) {
                 for (var operationIndex = 0; operationIndex < operations.length; operationIndex++) {
@@ -71048,49 +57547,33 @@ var ts;
             }
             return [];
         }
-        /**
-         * Flush the current label and advance to a new label.
-         */
         function flushLabel() {
             if (!statements) {
                 return;
             }
-            appendLabel(/*markLabelEnd*/ !lastOperationWasAbrupt);
+            appendLabel(!lastOperationWasAbrupt);
             lastOperationWasAbrupt = false;
             lastOperationWasCompletion = false;
             labelNumber++;
         }
-        /**
-         * Flush the final label of the generator function body.
-         */
         function flushFinalLabel(operationIndex) {
             if (isFinalLabelReachable(operationIndex)) {
                 tryEnterLabel(operationIndex);
                 withBlockStack = undefined;
-                writeReturn(/*expression*/ undefined, /*operationLocation*/ undefined);
+                writeReturn(undefined, undefined);
             }
             if (statements && clauses) {
-                appendLabel(/*markLabelEnd*/ false);
+                appendLabel(false);
             }
             updateLabelExpressions();
         }
-        /**
-         * Tests whether the final label of the generator function body
-         * is reachable by user code.
-         */
         function isFinalLabelReachable(operationIndex) {
-            // if the last operation was *not* a completion (return/throw) then
-            // the final label is reachable.
             if (!lastOperationWasCompletion) {
                 return true;
             }
-            // if there are no labels defined or referenced, then the final label is
-            // not reachable.
             if (!labelOffsets || !labelExpressions) {
                 return false;
             }
-            // if the label for this offset is referenced, then the final label
-            // is reachable.
             for (var label = 0; label < labelOffsets.length; label++) {
                 if (labelOffsets[label] === operationIndex && labelExpressions[label]) {
                     return true;
@@ -71098,33 +57581,20 @@ var ts;
             }
             return false;
         }
-        /**
-         * Appends a case clause for the last label and sets the new label.
-         *
-         * @param markLabelEnd Indicates that the transition between labels was a fall-through
-         *                     from a previous case clause and the change in labels should be
-         *                     reflected on the `state` object.
-         */
         function appendLabel(markLabelEnd) {
             if (!clauses) {
                 clauses = [];
             }
             if (statements) {
                 if (withBlockStack) {
-                    // The previous label was nested inside one or more `with` blocks, so we
-                    // surround the statements in generated `with` blocks to create the same environment.
                     for (var i = withBlockStack.length - 1; i >= 0; i--) {
                         var withBlock = withBlockStack[i];
                         statements = [ts.createWith(withBlock.expression, ts.createBlock(statements))];
                     }
                 }
                 if (currentExceptionBlock) {
-                    // The previous label was nested inside of an exception block, so we must
-                    // indicate entry into a protected region by pushing the label numbers
-                    // for each block in the protected region.
                     var startLabel = currentExceptionBlock.startLabel, catchLabel = currentExceptionBlock.catchLabel, finallyLabel = currentExceptionBlock.finallyLabel, endLabel = currentExceptionBlock.endLabel;
-                    statements.unshift(ts.createStatement(ts.createCall(ts.createPropertyAccess(ts.createPropertyAccess(state, "trys"), "push"), 
-                    /*typeArguments*/ undefined, [
+                    statements.unshift(ts.createStatement(ts.createCall(ts.createPropertyAccess(ts.createPropertyAccess(state, "trys"), "push"), undefined, [
                         ts.createArrayLiteral([
                             createLabel(startLabel),
                             createLabel(catchLabel),
@@ -71135,17 +57605,12 @@ var ts;
                     currentExceptionBlock = undefined;
                 }
                 if (markLabelEnd) {
-                    // The case clause for the last label falls through to this label, so we
-                    // add an assignment statement to reflect the change in labels.
                     statements.push(ts.createStatement(ts.createAssignment(ts.createPropertyAccess(state, "label"), ts.createLiteral(labelNumber + 1))));
                 }
             }
             clauses.push(ts.createCaseClause(ts.createLiteral(labelNumber), statements || []));
             statements = undefined;
         }
-        /**
-         * Tries to enter into a new label at the current operation index.
-         */
         function tryEnterLabel(operationIndex) {
             if (!labelOffsets) {
                 return;
@@ -71165,9 +57630,6 @@ var ts;
                 }
             }
         }
-        /**
-         * Updates literal expressions for labels with actual label numbers.
-         */
         function updateLabelExpressions() {
             if (labelExpressions !== undefined && labelNumbers !== undefined) {
                 for (var labelNumber_1 = 0; labelNumber_1 < labelNumbers.length; labelNumber_1++) {
@@ -71187,17 +57649,14 @@ var ts;
                 }
             }
         }
-        /**
-         * Tries to enter or leave a code block.
-         */
         function tryEnterOrLeaveBlock(operationIndex) {
             if (blocks) {
                 for (; blockIndex < blockActions.length && blockOffsets[blockIndex] <= operationIndex; blockIndex++) {
                     var block = blocks[blockIndex];
                     var blockAction = blockActions[blockIndex];
                     switch (block.kind) {
-                        case 0 /* Exception */:
-                            if (blockAction === 0 /* Open */) {
+                        case 0:
+                            if (blockAction === 0) {
                                 if (!exceptionBlockStack) {
                                     exceptionBlockStack = [];
                                 }
@@ -71207,76 +57666,64 @@ var ts;
                                 exceptionBlockStack.push(currentExceptionBlock);
                                 currentExceptionBlock = block;
                             }
-                            else if (blockAction === 1 /* Close */) {
+                            else if (blockAction === 1) {
                                 currentExceptionBlock = exceptionBlockStack.pop();
                             }
                             break;
-                        case 1 /* With */:
-                            if (blockAction === 0 /* Open */) {
+                        case 1:
+                            if (blockAction === 0) {
                                 if (!withBlockStack) {
                                     withBlockStack = [];
                                 }
                                 withBlockStack.push(block);
                             }
-                            else if (blockAction === 1 /* Close */) {
+                            else if (blockAction === 1) {
                                 withBlockStack.pop();
                             }
                             break;
-                        // default: do nothing
                     }
                 }
             }
         }
-        /**
-         * Writes an operation as a statement to the current label's statement list.
-         *
-         * @param operation The OpCode of the operation
-         */
         function writeOperation(operationIndex) {
             tryEnterLabel(operationIndex);
             tryEnterOrLeaveBlock(operationIndex);
-            // early termination, nothing else to process in this label
             if (lastOperationWasAbrupt) {
                 return;
             }
             lastOperationWasAbrupt = false;
             lastOperationWasCompletion = false;
             var opcode = operations[operationIndex];
-            if (opcode === 0 /* Nop */) {
+            if (opcode === 0) {
                 return;
             }
-            else if (opcode === 10 /* Endfinally */) {
+            else if (opcode === 10) {
                 return writeEndfinally();
             }
             var args = operationArguments[operationIndex];
-            if (opcode === 1 /* Statement */) {
+            if (opcode === 1) {
                 return writeStatement(args[0]);
             }
             var location = operationLocations[operationIndex];
             switch (opcode) {
-                case 2 /* Assign */:
+                case 2:
                     return writeAssign(args[0], args[1], location);
-                case 3 /* Break */:
+                case 3:
                     return writeBreak(args[0], location);
-                case 4 /* BreakWhenTrue */:
+                case 4:
                     return writeBreakWhenTrue(args[0], args[1], location);
-                case 5 /* BreakWhenFalse */:
+                case 5:
                     return writeBreakWhenFalse(args[0], args[1], location);
-                case 6 /* Yield */:
+                case 6:
                     return writeYield(args[0], location);
-                case 7 /* YieldStar */:
+                case 7:
                     return writeYieldStar(args[0], location);
-                case 8 /* Return */:
+                case 8:
                     return writeReturn(args[0], location);
-                case 9 /* Throw */:
+                case 9:
                     return writeThrow(args[0], location);
             }
         }
-        /**
-         * Writes a statement to the current label's statement list.
-         *
-         * @param statement A statement to write.
-         */
         function writeStatement(statement) {
             if (statement) {
                 if (!statements) {
@@ -71287,179 +57734,65 @@ var ts;
                 }
             }
         }
-        /**
-         * Writes an Assign operation to the current label's statement list.
-         *
-         * @param left The left-hand side of the assignment.
-         * @param right The right-hand side of the assignment.
-         * @param operationLocation The source map location for the operation.
-         */
         function writeAssign(left, right, operationLocation) {
             writeStatement(ts.setTextRange(ts.createStatement(ts.createAssignment(left, right)), operationLocation));
         }
-        /**
-         * Writes a Throw operation to the current label's statement list.
-         *
-         * @param expression The value to throw.
-         * @param operationLocation The source map location for the operation.
-         */
         function writeThrow(expression, operationLocation) {
             lastOperationWasAbrupt = true;
             lastOperationWasCompletion = true;
             writeStatement(ts.setTextRange(ts.createThrow(expression), operationLocation));
         }
-        /**
-         * Writes a Return operation to the current label's statement list.
-         *
-         * @param expression The value to return.
-         * @param operationLocation The source map location for the operation.
-         */
         function writeReturn(expression, operationLocation) {
             lastOperationWasAbrupt = true;
             lastOperationWasCompletion = true;
             writeStatement(ts.setEmitFlags(ts.setTextRange(ts.createReturn(ts.createArrayLiteral(expression
-                ? [createInstruction(2 /* Return */), expression]
-                : [createInstruction(2 /* Return */)])), operationLocation), 384 /* NoTokenSourceMaps */));
-        }
-        /**
-         * Writes a Break operation to the current label's statement list.
-         *
-         * @param label The label for the Break.
-         * @param operationLocation The source map location for the operation.
-         */
+                ? [createInstruction(2), expression]
+                : [createInstruction(2)])), operationLocation), 384));
+        }
         function writeBreak(label, operationLocation) {
             lastOperationWasAbrupt = true;
             writeStatement(ts.setEmitFlags(ts.setTextRange(ts.createReturn(ts.createArrayLiteral([
-                createInstruction(3 /* Break */),
+                createInstruction(3),
                 createLabel(label)
-            ])), operationLocation), 384 /* NoTokenSourceMaps */));
-        }
-        /**
-         * Writes a BreakWhenTrue operation to the current label's statement list.
-         *
-         * @param label The label for the Break.
-         * @param condition The condition for the Break.
-         * @param operationLocation The source map location for the operation.
-         */
+            ])), operationLocation), 384));
+        }
         function writeBreakWhenTrue(label, condition, operationLocation) {
             writeStatement(ts.setEmitFlags(ts.createIf(condition, ts.setEmitFlags(ts.setTextRange(ts.createReturn(ts.createArrayLiteral([
-                createInstruction(3 /* Break */),
+                createInstruction(3),
                 createLabel(label)
-            ])), operationLocation), 384 /* NoTokenSourceMaps */)), 1 /* SingleLine */));
-        }
-        /**
-         * Writes a BreakWhenFalse operation to the current label's statement list.
-         *
-         * @param label The label for the Break.
-         * @param condition The condition for the Break.
-         * @param operationLocation The source map location for the operation.
-         */
+            ])), operationLocation), 384)), 1));
+        }
         function writeBreakWhenFalse(label, condition, operationLocation) {
             writeStatement(ts.setEmitFlags(ts.createIf(ts.createLogicalNot(condition), ts.setEmitFlags(ts.setTextRange(ts.createReturn(ts.createArrayLiteral([
-                createInstruction(3 /* Break */),
+                createInstruction(3),
                 createLabel(label)
-            ])), operationLocation), 384 /* NoTokenSourceMaps */)), 1 /* SingleLine */));
-        }
-        /**
-         * Writes a Yield operation to the current label's statement list.
-         *
-         * @param expression The expression to yield.
-         * @param operationLocation The source map location for the operation.
-         */
+            ])), operationLocation), 384)), 1));
+        }
         function writeYield(expression, operationLocation) {
             lastOperationWasAbrupt = true;
             writeStatement(ts.setEmitFlags(ts.setTextRange(ts.createReturn(ts.createArrayLiteral(expression
-                ? [createInstruction(4 /* Yield */), expression]
-                : [createInstruction(4 /* Yield */)])), operationLocation), 384 /* NoTokenSourceMaps */));
-        }
-        /**
-         * Writes a YieldStar instruction to the current label's statement list.
-         *
-         * @param expression The expression to yield.
-         * @param operationLocation The source map location for the operation.
-         */
+                ? [createInstruction(4), expression]
+                : [createInstruction(4)])), operationLocation), 384));
+        }
         function writeYieldStar(expression, operationLocation) {
             lastOperationWasAbrupt = true;
             writeStatement(ts.setEmitFlags(ts.setTextRange(ts.createReturn(ts.createArrayLiteral([
-                createInstruction(5 /* YieldStar */),
+                createInstruction(5),
                 expression
-            ])), operationLocation), 384 /* NoTokenSourceMaps */));
+            ])), operationLocation), 384));
         }
-        /**
-         * Writes an Endfinally instruction to the current label's statement list.
-         */
         function writeEndfinally() {
             lastOperationWasAbrupt = true;
             writeStatement(ts.createReturn(ts.createArrayLiteral([
-                createInstruction(7 /* Endfinally */)
+                createInstruction(7)
             ])));
         }
     }
     ts.transformGenerators = transformGenerators;
     function createGeneratorHelper(context, body) {
         context.requestEmitHelper(generatorHelper);
-        return ts.createCall(ts.getHelperName("__generator"), 
-        /*typeArguments*/ undefined, [ts.createThis(), body]);
-    }
-    // The __generator helper is used by down-level transformations to emulate the runtime
-    // semantics of an ES2015 generator function. When called, this helper returns an
-    // object that implements the Iterator protocol, in that it has `next`, `return`, and
-    // `throw` methods that step through the generator when invoked.
-    //
-    // parameters:
-    //  @param thisArg  The value to use as the `this` binding for the transformed generator body.
-    //  @param body     A function that acts as the transformed generator body.
-    //
-    // variables:
-    //  _       Persistent state for the generator that is shared between the helper and the
-    //          generator body. The state object has the following members:
-    //            sent() - A method that returns or throws the current completion value.
-    //            label  - The next point at which to resume evaluation of the generator body.
-    //            trys   - A stack of protected regions (try/catch/finally blocks).
-    //            ops    - A stack of pending instructions when inside of a finally block.
-    //  f       A value indicating whether the generator is executing.
-    //  y       An iterator to delegate for a yield*.
-    //  t       A temporary variable that holds one of the following values (note that these
-    //          cases do not overlap):
-    //          - The completion value when resuming from a `yield` or `yield*`.
-    //          - The error value for a catch block.
-    //          - The current protected region (array of try/catch/finally/end labels).
-    //          - The verb (`next`, `throw`, or `return` method) to delegate to the expression
-    //            of a `yield*`.
-    //          - The result of evaluating the verb delegated to the expression of a `yield*`.
-    //
-    // functions:
-    //  verb(n)     Creates a bound callback to the `step` function for opcode `n`.
-    //  step(op)    Evaluates opcodes in a generator body until execution is suspended or
-    //              completed.
-    //
-    // The __generator helper understands a limited set of instructions:
-    //  0: next(value?)     - Start or resume the generator with the specified value.
-    //  1: throw(error)     - Resume the generator with an exception. If the generator is
-    //                        suspended inside of one or more protected regions, evaluates
-    //                        any intervening finally blocks between the current label and
-    //                        the nearest catch block or function boundary. If uncaught, the
-    //                        exception is thrown to the caller.
-    //  2: return(value?)   - Resume the generator as if with a return. If the generator is
-    //                        suspended inside of one or more protected regions, evaluates any
-    //                        intervening finally blocks.
-    //  3: break(label)     - Jump to the specified label. If the label is outside of the
-    //                        current protected region, evaluates any intervening finally
-    //                        blocks.
-    //  4: yield(value?)    - Yield execution to the caller with an optional value. When
-    //                        resumed, the generator will continue at the next label.
-    //  5: yield*(value)    - Delegates evaluation to the supplied iterator. When
-    //                        delegation completes, the generator will continue at the next
-    //                        label.
-    //  6: catch(error)     - Handles an exception thrown from within the generator body. If
-    //                        the current label is inside of one or more protected regions,
-    //                        evaluates any intervening finally blocks between the current
-    //                        label and the nearest catch block or function boundary. If
-    //                        uncaught, the exception is thrown to the caller.
-    //  7: endfinally       - Ends a finally block, resuming the last instruction prior to
-    //                        entering a finally block.
-    //
-    // For examples of how these are used, see the comments in ./transformers/generators.ts
+        return ts.createCall(ts.getHelperName("__generator"), undefined, [ts.createThis(), body]);
+    }
     var generatorHelper = {
         name: "typescript:generator",
         scoped: false,
@@ -71467,7 +57800,6 @@ var ts;
         text: "\n            var __generator = (this && this.__generator) || function (thisArg, body) {\n                var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;\n                return g = { next: verb(0), \"throw\": verb(1), \"return\": verb(2) }, typeof Symbol === \"function\" && (g[Symbol.iterator] = function() { return this; }), g;\n                function verb(n) { return function (v) { return step([n, v]); }; }\n                function step(op) {\n                    if (f) throw new TypeError(\"Generator is already executing.\");\n                    while (_) try {\n                        if (f = 1, y && (t = op[0] & 2 ? y[\"return\"] : op[0] ? y[\"throw\"] || ((t = y[\"return\"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;\n                        if (y = 0, t) op = [op[0] & 2, t.value];\n                        switch (op[0]) {\n                            case 0: case 1: t = op; break;\n                            case 4: _.label++; return { value: op[1], done: false };\n                            case 5: _.label++; y = op[1]; op = [0]; continue;\n                            case 7: op = _.ops.pop(); _.trys.pop(); continue;\n                            default:\n                                if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }\n                                if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }\n                                if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }\n                                if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }\n                                if (t[2]) _.ops.pop();\n                                _.trys.pop(); continue;\n                        }\n                        op = body.call(thisArg, _);\n                    } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }\n                    if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };\n                }\n            };"
     };
 })(ts || (ts = {}));
-/*@internal*/
 var ts;
 (function (ts) {
     function transformModule(context) {
@@ -71488,32 +57820,26 @@ var ts;
         var previousOnEmitNode = context.onEmitNode;
         context.onSubstituteNode = onSubstituteNode;
         context.onEmitNode = onEmitNode;
-        context.enableSubstitution(71 /* Identifier */); // Substitutes expression identifiers with imported/exported symbols.
-        context.enableSubstitution(200 /* BinaryExpression */); // Substitutes assignments to exported symbols.
-        context.enableSubstitution(198 /* PrefixUnaryExpression */); // Substitutes updates to exported symbols.
-        context.enableSubstitution(199 /* PostfixUnaryExpression */); // Substitutes updates to exported symbols.
-        context.enableSubstitution(271 /* ShorthandPropertyAssignment */); // Substitutes shorthand property assignments for imported/exported symbols.
-        context.enableEmitNotification(274 /* SourceFile */); // Restore state when substituting nodes in a file.
-        var moduleInfoMap = []; // The ExternalModuleInfo for each file.
-        var deferredExports = []; // Exports to defer until an EndOfDeclarationMarker is found.
-        var currentSourceFile; // The current file.
-        var currentModuleInfo; // The ExternalModuleInfo for the current file.
-        var noSubstitution; // Set of nodes for which substitution rules should be ignored.
+        context.enableSubstitution(71);
+        context.enableSubstitution(200);
+        context.enableSubstitution(198);
+        context.enableSubstitution(199);
+        context.enableSubstitution(271);
+        context.enableEmitNotification(274);
+        var moduleInfoMap = [];
+        var deferredExports = [];
+        var currentSourceFile;
+        var currentModuleInfo;
+        var noSubstitution;
         var needUMDDynamicImportHelper;
         return ts.chainBundle(transformSourceFile);
-        /**
-         * Transforms the module aspects of a SourceFile.
-         *
-         * @param node The SourceFile node.
-         */
         function transformSourceFile(node) {
-            if (node.isDeclarationFile || !(ts.isEffectiveExternalModule(node, compilerOptions) || node.transformFlags & 67108864 /* ContainsDynamicImport */)) {
+            if (node.isDeclarationFile || !(ts.isEffectiveExternalModule(node, compilerOptions) || node.transformFlags & 67108864)) {
                 return node;
             }
             currentSourceFile = node;
             currentModuleInfo = ts.collectExternalModuleInfo(node, resolver, compilerOptions);
             moduleInfoMap[ts.getOriginalNodeId(node)] = currentModuleInfo;
-            // Perform the transformation.
             var transformModule = getTransformModuleDelegate(moduleKind);
             var updated = transformModule(node);
             currentSourceFile = undefined;
@@ -71527,11 +57853,6 @@ var ts;
             }
             return false;
         }
-        /**
-         * Transforms a SourceFile into a CommonJS module.
-         *
-         * @param node The SourceFile node.
-         */
         function transformCommonJSModule(node) {
             startLexicalEnvironment();
             var statements = [];
@@ -71542,105 +57863,48 @@ var ts;
             }
             ts.append(statements, ts.visitNode(currentModuleInfo.externalHelpersImportDeclaration, sourceElementVisitor, ts.isStatement));
             ts.addRange(statements, ts.visitNodes(node.statements, sourceElementVisitor, ts.isStatement, statementOffset));
-            addExportEqualsIfNeeded(statements, /*emitAsReturn*/ false);
+            addExportEqualsIfNeeded(statements, false);
             ts.prependStatements(statements, endLexicalEnvironment());
             var updated = ts.updateSourceFileNode(node, ts.setTextRange(ts.createNodeArray(statements), node.statements));
             if (currentModuleInfo.hasExportStarsToExportValues && !compilerOptions.importHelpers) {
-                // If we have any `export * from ...` declarations
-                // we need to inform the emitter to add the __export helper.
                 ts.addEmitHelper(updated, exportStarHelper);
             }
             ts.addEmitHelpers(updated, context.readEmitHelpers());
             return updated;
         }
-        /**
-         * Transforms a SourceFile into an AMD module.
-         *
-         * @param node The SourceFile node.
-         */
         function transformAMDModule(node) {
             var define = ts.createIdentifier("define");
             var moduleName = ts.tryGetModuleNameFromFile(node, host, compilerOptions);
-            // An AMD define function has the following shape:
-            //
-            //     define(id?, dependencies?, factory);
-            //
-            // This has the shape of the following:
-            //
-            //     define(name, ["module1", "module2"], function (module1Alias) { ... }
-            //
-            // The location of the alias in the parameter list in the factory function needs to
-            // match the position of the module name in the dependency list.
-            //
-            // To ensure this is true in cases of modules with no aliases, e.g.:
-            //
-            //     import "module"
-            //
-            // or
-            //
-            //     /// <amd-dependency path= "a.css" />
-            //
-            // we need to add modules without alias names to the end of the dependencies list
-            var _a = collectAsynchronousDependencies(node, /*includeNonAmdDependencies*/ true), aliasedModuleNames = _a.aliasedModuleNames, unaliasedModuleNames = _a.unaliasedModuleNames, importAliasNames = _a.importAliasNames;
-            // Create an updated SourceFile:
-            //
-            //     define(moduleName?, ["module1", "module2"], function ...
+            var _a = collectAsynchronousDependencies(node, true), aliasedModuleNames = _a.aliasedModuleNames, unaliasedModuleNames = _a.unaliasedModuleNames, importAliasNames = _a.importAliasNames;
             var updated = ts.updateSourceFileNode(node, ts.setTextRange(ts.createNodeArray([
-                ts.createStatement(ts.createCall(define, 
-                /*typeArguments*/ undefined, (moduleName ? [moduleName] : []).concat([
-                    // Add the dependency array argument:
-                    //
-                    //     ["require", "exports", module1", "module2", ...]
+                ts.createStatement(ts.createCall(define, undefined, (moduleName ? [moduleName] : []).concat([
                     ts.createArrayLiteral([
                         ts.createLiteral("require"),
                         ts.createLiteral("exports")
                     ].concat(aliasedModuleNames, unaliasedModuleNames)),
-                    // Add the module body function argument:
-                    //
-                    //     function (require, exports, module1, module2) ...
-                    ts.createFunctionExpression(
-                    /*modifiers*/ undefined, 
-                    /*asteriskToken*/ undefined, 
-                    /*name*/ undefined, 
-                    /*typeParameters*/ undefined, [
-                        ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, "require"),
-                        ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, "exports")
-                    ].concat(importAliasNames), 
-                    /*type*/ undefined, transformAsynchronousModuleBody(node))
+                    ts.createFunctionExpression(undefined, undefined, undefined, undefined, [
+                        ts.createParameter(undefined, undefined, undefined, "require"),
+                        ts.createParameter(undefined, undefined, undefined, "exports")
+                    ].concat(importAliasNames), undefined, transformAsynchronousModuleBody(node))
                 ])))
-            ]), 
-            /*location*/ node.statements));
+            ]), node.statements));
             ts.addEmitHelpers(updated, context.readEmitHelpers());
             return updated;
         }
-        /**
-         * Transforms a SourceFile into a UMD module.
-         *
-         * @param node The SourceFile node.
-         */
         function transformUMDModule(node) {
-            var _a = collectAsynchronousDependencies(node, /*includeNonAmdDependencies*/ false), aliasedModuleNames = _a.aliasedModuleNames, unaliasedModuleNames = _a.unaliasedModuleNames, importAliasNames = _a.importAliasNames;
+            var _a = collectAsynchronousDependencies(node, false), aliasedModuleNames = _a.aliasedModuleNames, unaliasedModuleNames = _a.unaliasedModuleNames, importAliasNames = _a.importAliasNames;
             var moduleName = ts.tryGetModuleNameFromFile(node, host, compilerOptions);
-            var umdHeader = ts.createFunctionExpression(
-            /*modifiers*/ undefined, 
-            /*asteriskToken*/ undefined, 
-            /*name*/ undefined, 
-            /*typeParameters*/ undefined, [ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, "factory")], 
-            /*type*/ undefined, ts.setTextRange(ts.createBlock([
+            var umdHeader = ts.createFunctionExpression(undefined, undefined, undefined, undefined, [ts.createParameter(undefined, undefined, undefined, "factory")], undefined, ts.setTextRange(ts.createBlock([
                 ts.createIf(ts.createLogicalAnd(ts.createTypeCheck(ts.createIdentifier("module"), "object"), ts.createTypeCheck(ts.createPropertyAccess(ts.createIdentifier("module"), "exports"), "object")), ts.createBlock([
-                    ts.createVariableStatement(
-                    /*modifiers*/ undefined, [
-                        ts.createVariableDeclaration("v", 
-                        /*type*/ undefined, ts.createCall(ts.createIdentifier("factory"), 
-                        /*typeArguments*/ undefined, [
+                    ts.createVariableStatement(undefined, [
+                        ts.createVariableDeclaration("v", undefined, ts.createCall(ts.createIdentifier("factory"), undefined, [
                             ts.createIdentifier("require"),
                             ts.createIdentifier("exports")
                         ]))
                     ]),
-                    ts.setEmitFlags(ts.createIf(ts.createStrictInequality(ts.createIdentifier("v"), ts.createIdentifier("undefined")), ts.createStatement(ts.createAssignment(ts.createPropertyAccess(ts.createIdentifier("module"), "exports"), ts.createIdentifier("v")))), 1 /* SingleLine */)
+                    ts.setEmitFlags(ts.createIf(ts.createStrictInequality(ts.createIdentifier("v"), ts.createIdentifier("undefined")), ts.createStatement(ts.createAssignment(ts.createPropertyAccess(ts.createIdentifier("module"), "exports"), ts.createIdentifier("v")))), 1)
                 ]), ts.createIf(ts.createLogicalAnd(ts.createTypeCheck(ts.createIdentifier("define"), "function"), ts.createPropertyAccess(ts.createIdentifier("define"), "amd")), ts.createBlock([
-                    ts.createStatement(ts.createCall(ts.createIdentifier("define"), 
-                    /*typeArguments*/ undefined, (moduleName ? [moduleName] : []).concat([
+                    ts.createStatement(ts.createCall(ts.createIdentifier("define"), undefined, (moduleName ? [moduleName] : []).concat([
                         ts.createArrayLiteral([
                             ts.createLiteral("require"),
                             ts.createLiteral("exports")
@@ -71648,62 +57912,27 @@ var ts;
                         ts.createIdentifier("factory")
                     ])))
                 ])))
-            ], 
-            /*multiLine*/ true), 
-            /*location*/ undefined));
-            // Create an updated SourceFile:
-            //
-            //  (function (factory) {
-            //      if (typeof module === "object" && typeof module.exports === "object") {
-            //          var v = factory(require, exports);
-            //          if (v !== undefined) module.exports = v;
-            //      }
-            //      else if (typeof define === 'function' && define.amd) {
-            //          define(["require", "exports"], factory);
-            //      }
-            //  })(function ...)
+            ], true), undefined));
             var updated = ts.updateSourceFileNode(node, ts.setTextRange(ts.createNodeArray([
-                ts.createStatement(ts.createCall(umdHeader, 
-                /*typeArguments*/ undefined, [
-                    // Add the module body function argument:
-                    //
-                    //     function (require, exports) ...
-                    ts.createFunctionExpression(
-                    /*modifiers*/ undefined, 
-                    /*asteriskToken*/ undefined, 
-                    /*name*/ undefined, 
-                    /*typeParameters*/ undefined, [
-                        ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, "require"),
-                        ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, "exports")
-                    ].concat(importAliasNames), 
-                    /*type*/ undefined, transformAsynchronousModuleBody(node))
+                ts.createStatement(ts.createCall(umdHeader, undefined, [
+                    ts.createFunctionExpression(undefined, undefined, undefined, undefined, [
+                        ts.createParameter(undefined, undefined, undefined, "require"),
+                        ts.createParameter(undefined, undefined, undefined, "exports")
+                    ].concat(importAliasNames), undefined, transformAsynchronousModuleBody(node))
                 ]))
-            ]), 
-            /*location*/ node.statements));
+            ]), node.statements));
             ts.addEmitHelpers(updated, context.readEmitHelpers());
             return updated;
         }
-        /**
-         * Collect the additional asynchronous dependencies for the module.
-         *
-         * @param node The source file.
-         * @param includeNonAmdDependencies A value indicating whether to include non-AMD dependencies.
-         */
         function collectAsynchronousDependencies(node, includeNonAmdDependencies) {
-            // names of modules with corresponding parameter in the factory function
             var aliasedModuleNames = [];
-            // names of modules with no corresponding parameters in factory function
             var unaliasedModuleNames = [];
-            // names of the parameters in the factory function; these
-            // parameters need to match the indexes of the corresponding
-            // module names in aliasedModuleNames.
             var importAliasNames = [];
-            // Fill in amd-dependency tags
             for (var _i = 0, _a = node.amdDependencies; _i < _a.length; _i++) {
                 var amdDependency = _a[_i];
                 if (amdDependency.name) {
                     aliasedModuleNames.push(ts.createLiteral(amdDependency.path));
-                    importAliasNames.push(ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, amdDependency.name));
+                    importAliasNames.push(ts.createParameter(undefined, undefined, undefined, amdDependency.name));
                 }
                 else {
                     unaliasedModuleNames.push(ts.createLiteral(amdDependency.path));
@@ -71711,20 +57940,13 @@ var ts;
             }
             for (var _b = 0, _c = currentModuleInfo.externalImports; _b < _c.length; _b++) {
                 var importNode = _c[_b];
-                // Find the name of the external module
                 var externalModuleName = ts.getExternalModuleNameLiteral(importNode, currentSourceFile, host, resolver, compilerOptions);
-                // Find the name of the module alias, if there is one
                 var importAliasName = ts.getLocalNameForExternalImport(importNode, currentSourceFile);
-                // It is possible that externalModuleName is undefined if it is not string literal.
-                // This can happen in the invalid import syntax.
-                // E.g : "import * from alias from 'someLib';"
                 if (externalModuleName) {
                     if (includeNonAmdDependencies && importAliasName) {
-                        // Set emitFlags on the name of the classDeclaration
-                        // This is so that when printer will not substitute the identifier
-                        ts.setEmitFlags(importAliasName, 4 /* NoSubstitution */);
+                        ts.setEmitFlags(importAliasName, 4);
                         aliasedModuleNames.push(externalModuleName);
-                        importAliasNames.push(ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, importAliasName));
+                        importAliasNames.push(ts.createParameter(undefined, undefined, undefined, importAliasName));
                     }
                     else {
                         unaliasedModuleNames.push(externalModuleName);
@@ -71737,40 +57959,29 @@ var ts;
             if (ts.isImportEqualsDeclaration(node) || ts.isExportDeclaration(node) || !ts.getExternalModuleNameLiteral(node, currentSourceFile, host, resolver, compilerOptions)) {
                 return undefined;
             }
-            var name = ts.getLocalNameForExternalImport(node, currentSourceFile); // TODO: GH#18217
+            var name = ts.getLocalNameForExternalImport(node, currentSourceFile);
             var expr = getHelperExpressionForImport(node, name);
             if (expr === name) {
                 return undefined;
             }
             return ts.createStatement(ts.createAssignment(name, expr));
         }
-        /**
-         * Transforms a SourceFile into an AMD or UMD module body.
-         *
-         * @param node The SourceFile node.
-         */
         function transformAsynchronousModuleBody(node) {
             startLexicalEnvironment();
             var statements = [];
-            var statementOffset = ts.addPrologue(statements, node.statements, /*ensureUseStrict*/ !compilerOptions.noImplicitUseStrict, sourceElementVisitor);
+            var statementOffset = ts.addPrologue(statements, node.statements, !compilerOptions.noImplicitUseStrict, sourceElementVisitor);
             if (shouldEmitUnderscoreUnderscoreESModule()) {
                 ts.append(statements, createUnderscoreUnderscoreESModule());
             }
-            // Visit each statement of the module body.
             ts.append(statements, ts.visitNode(currentModuleInfo.externalHelpersImportDeclaration, sourceElementVisitor, ts.isStatement));
             if (moduleKind === ts.ModuleKind.AMD) {
                 ts.addRange(statements, ts.mapDefined(currentModuleInfo.externalImports, getAMDImportExpressionForImport));
             }
             ts.addRange(statements, ts.visitNodes(node.statements, sourceElementVisitor, ts.isStatement, statementOffset));
-            // Append the 'export =' statement if provided.
-            addExportEqualsIfNeeded(statements, /*emitAsReturn*/ true);
-            // End the lexical environment for the module body
-            // and merge any new lexical declarations.
+            addExportEqualsIfNeeded(statements, true);
             ts.prependStatements(statements, endLexicalEnvironment());
-            var body = ts.createBlock(statements, /*multiLine*/ true);
+            var body = ts.createBlock(statements, true);
             if (currentModuleInfo.hasExportStarsToExportValues && !compilerOptions.importHelpers) {
-                // If we have any `export * from ...` declarations
-                // we need to inform the emitter to add the __export helper.
                 ts.addEmitHelper(body, exportStarHelper);
             }
             if (needUMDDynamicImportHelper) {
@@ -71778,14 +57989,6 @@ var ts;
             }
             return body;
         }
-        /**
-         * Adds the down-level representation of `export=` to the statement list if one exists
-         * in the source file.
-         *
-         * @param statements The Statement list to modify.
-         * @param emitAsReturn A value indicating whether to emit the `export=` statement as a
-         * return statement.
-         */
         function addExportEqualsIfNeeded(statements, emitAsReturn) {
             if (currentModuleInfo.exportEquals) {
                 var expressionResult = ts.visitNode(currentModuleInfo.exportEquals.expression, moduleExpressionElementVisitor);
@@ -71793,60 +57996,50 @@ var ts;
                     if (emitAsReturn) {
                         var statement = ts.createReturn(expressionResult);
                         ts.setTextRange(statement, currentModuleInfo.exportEquals);
-                        ts.setEmitFlags(statement, 384 /* NoTokenSourceMaps */ | 1536 /* NoComments */);
+                        ts.setEmitFlags(statement, 384 | 1536);
                         statements.push(statement);
                     }
                     else {
                         var statement = ts.createStatement(ts.createAssignment(ts.createPropertyAccess(ts.createIdentifier("module"), "exports"), expressionResult));
                         ts.setTextRange(statement, currentModuleInfo.exportEquals);
-                        ts.setEmitFlags(statement, 1536 /* NoComments */);
+                        ts.setEmitFlags(statement, 1536);
                         statements.push(statement);
                     }
                 }
             }
         }
-        //
-        // Top-Level Source Element Visitors
-        //
-        /**
-         * Visits a node at the top level of the source file.
-         *
-         * @param node The node to visit.
-         */
         function sourceElementVisitor(node) {
             switch (node.kind) {
-                case 244 /* ImportDeclaration */:
+                case 244:
                     return visitImportDeclaration(node);
-                case 243 /* ImportEqualsDeclaration */:
+                case 243:
                     return visitImportEqualsDeclaration(node);
-                case 250 /* ExportDeclaration */:
+                case 250:
                     return visitExportDeclaration(node);
-                case 249 /* ExportAssignment */:
+                case 249:
                     return visitExportAssignment(node);
-                case 214 /* VariableStatement */:
+                case 214:
                     return visitVariableStatement(node);
-                case 234 /* FunctionDeclaration */:
+                case 234:
                     return visitFunctionDeclaration(node);
-                case 235 /* ClassDeclaration */:
+                case 235:
                     return visitClassDeclaration(node);
-                case 303 /* MergeDeclarationMarker */:
+                case 303:
                     return visitMergeDeclarationMarker(node);
-                case 304 /* EndOfDeclarationMarker */:
+                case 304:
                     return visitEndOfDeclarationMarker(node);
                 default:
                     return ts.visitEachChild(node, moduleExpressionElementVisitor, context);
             }
         }
         function moduleExpressionElementVisitor(node) {
-            // This visitor does not need to descend into the tree if there is no dynamic import or destructuring assignment,
-            // as export/import statements are only transformed at the top level of a file.
-            if (!(node.transformFlags & 67108864 /* ContainsDynamicImport */) && !(node.transformFlags & 2048 /* ContainsDestructuringAssignment */)) {
+            if (!(node.transformFlags & 67108864) && !(node.transformFlags & 2048)) {
                 return node;
             }
             if (ts.isImportCall(node)) {
                 return visitImportCallExpression(node);
             }
-            else if (node.transformFlags & 1024 /* DestructuringAssignment */ && ts.isBinaryExpression(node)) {
+            else if (node.transformFlags & 1024 && ts.isBinaryExpression(node)) {
                 return visitDestructuringAssignment(node);
             }
             else {
@@ -71858,24 +58051,24 @@ var ts;
                 for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
                     var elem = _a[_i];
                     switch (elem.kind) {
-                        case 270 /* PropertyAssignment */:
+                        case 270:
                             if (destructuringNeedsFlattening(elem.initializer)) {
                                 return true;
                             }
                             break;
-                        case 271 /* ShorthandPropertyAssignment */:
+                        case 271:
                             if (destructuringNeedsFlattening(elem.name)) {
                                 return true;
                             }
                             break;
-                        case 272 /* SpreadAssignment */:
+                        case 272:
                             if (destructuringNeedsFlattening(elem.expression)) {
                                 return true;
                             }
                             break;
-                        case 154 /* MethodDeclaration */:
-                        case 156 /* GetAccessor */:
-                        case 157 /* SetAccessor */:
+                        case 154:
+                        case 156:
+                        case 157:
                             return false;
                         default: ts.Debug.assertNever(elem, "Unhandled object member kind");
                     }
@@ -71901,13 +58094,13 @@ var ts;
         }
         function visitDestructuringAssignment(node) {
             if (destructuringNeedsFlattening(node.left)) {
-                return ts.flattenDestructuringAssignment(node, moduleExpressionElementVisitor, context, 0 /* All */, /*needsValue*/ false, createAllExportExpressions);
+                return ts.flattenDestructuringAssignment(node, moduleExpressionElementVisitor, context, 0, false, createAllExportExpressions);
             }
             return ts.visitEachChild(node, moduleExpressionElementVisitor, context);
         }
         function visitImportCallExpression(node) {
             var argument = ts.visitNode(ts.firstOrUndefined(node.arguments), moduleExpressionElementVisitor);
-            var containsLexicalThis = !!(node.transformFlags & 16384 /* ContainsLexicalThis */);
+            var containsLexicalThis = !!(node.transformFlags & 16384);
             switch (compilerOptions.module) {
                 case ts.ModuleKind.AMD:
                     return createImportCallExpressionAMD(argument, containsLexicalThis);
@@ -71919,181 +58112,103 @@ var ts;
             }
         }
         function createImportCallExpressionUMD(arg, containsLexicalThis) {
-            // (function (factory) {
-            //      ... (regular UMD)
-            // }
-            // })(function (require, exports, useSyncRequire) {
-            //      "use strict";
-            //      Object.defineProperty(exports, "__esModule", { value: true });
-            //      var __syncRequire = typeof module === "object" && typeof module.exports === "object";
-            //      var __resolved = new Promise(function (resolve) { resolve(); });
-            //      .....
-            //      __syncRequire
-            //          ? __resolved.then(function () { return require(x); }) /*CommonJs Require*/
-            //          : new Promise(function (_a, _b) { require([x], _a, _b); }); /*Amd Require*/
-            // });
             needUMDDynamicImportHelper = true;
             if (ts.isSimpleCopiableExpression(arg)) {
-                var argClone = ts.isGeneratedIdentifier(arg) ? arg : ts.isStringLiteral(arg) ? ts.createLiteral(arg) : ts.setEmitFlags(ts.setTextRange(ts.getSynthesizedClone(arg), arg), 1536 /* NoComments */);
-                return ts.createConditional(
-                /*condition*/ ts.createIdentifier("__syncRequire"), 
-                /*whenTrue*/ createImportCallExpressionCommonJS(arg, containsLexicalThis), 
-                /*whenFalse*/ createImportCallExpressionAMD(argClone, containsLexicalThis));
+                var argClone = ts.isGeneratedIdentifier(arg) ? arg : ts.isStringLiteral(arg) ? ts.createLiteral(arg) : ts.setEmitFlags(ts.setTextRange(ts.getSynthesizedClone(arg), arg), 1536);
+                return ts.createConditional(ts.createIdentifier("__syncRequire"), createImportCallExpressionCommonJS(arg, containsLexicalThis), createImportCallExpressionAMD(argClone, containsLexicalThis));
             }
             else {
                 var temp = ts.createTempVariable(hoistVariableDeclaration);
-                return ts.createComma(ts.createAssignment(temp, arg), ts.createConditional(
-                /*condition*/ ts.createIdentifier("__syncRequire"), 
-                /*whenTrue*/ createImportCallExpressionCommonJS(temp, containsLexicalThis), 
-                /*whenFalse*/ createImportCallExpressionAMD(temp, containsLexicalThis)));
+                return ts.createComma(ts.createAssignment(temp, arg), ts.createConditional(ts.createIdentifier("__syncRequire"), createImportCallExpressionCommonJS(temp, containsLexicalThis), createImportCallExpressionAMD(temp, containsLexicalThis)));
             }
         }
         function createImportCallExpressionAMD(arg, containsLexicalThis) {
-            // improt("./blah")
-            // emit as
-            // define(["require", "exports", "blah"], function (require, exports) {
-            //     ...
-            //     new Promise(function (_a, _b) { require([x], _a, _b); }); /*Amd Require*/
-            // });
             var resolve = ts.createUniqueName("resolve");
             var reject = ts.createUniqueName("reject");
             var parameters = [
-                ts.createParameter(/*decorator*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, /*name*/ resolve),
-                ts.createParameter(/*decorator*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, /*name*/ reject)
+                ts.createParameter(undefined, undefined, undefined, resolve),
+                ts.createParameter(undefined, undefined, undefined, reject)
             ];
             var body = ts.createBlock([
-                ts.createStatement(ts.createCall(ts.createIdentifier("require"), 
-                /*typeArguments*/ undefined, [ts.createArrayLiteral([arg || ts.createOmittedExpression()]), resolve, reject]))
+                ts.createStatement(ts.createCall(ts.createIdentifier("require"), undefined, [ts.createArrayLiteral([arg || ts.createOmittedExpression()]), resolve, reject]))
             ]);
             var func;
-            if (languageVersion >= 2 /* ES2015 */) {
-                func = ts.createArrowFunction(
-                /*modifiers*/ undefined, 
-                /*typeParameters*/ undefined, parameters, 
-                /*type*/ undefined, 
-                /*equalsGreaterThanToken*/ undefined, body);
+            if (languageVersion >= 2) {
+                func = ts.createArrowFunction(undefined, undefined, parameters, undefined, undefined, body);
             }
             else {
-                func = ts.createFunctionExpression(
-                /*modifiers*/ undefined, 
-                /*asteriskToken*/ undefined, 
-                /*name*/ undefined, 
-                /*typeParameters*/ undefined, parameters, 
-                /*type*/ undefined, body);
-                // if there is a lexical 'this' in the import call arguments, ensure we indicate
-                // that this new function expression indicates it captures 'this' so that the
-                // es2015 transformer will properly substitute 'this' with '_this'.
+                func = ts.createFunctionExpression(undefined, undefined, undefined, undefined, parameters, undefined, body);
                 if (containsLexicalThis) {
-                    ts.setEmitFlags(func, 8 /* CapturesThis */);
+                    ts.setEmitFlags(func, 8);
                 }
             }
-            var promise = ts.createNew(ts.createIdentifier("Promise"), /*typeArguments*/ undefined, [func]);
+            var promise = ts.createNew(ts.createIdentifier("Promise"), undefined, [func]);
             if (compilerOptions.esModuleInterop) {
                 context.requestEmitHelper(importStarHelper);
-                return ts.createCall(ts.createPropertyAccess(promise, ts.createIdentifier("then")), /*typeArguments*/ undefined, [ts.getHelperName("__importStar")]);
+                return ts.createCall(ts.createPropertyAccess(promise, ts.createIdentifier("then")), undefined, [ts.getHelperName("__importStar")]);
             }
             return promise;
         }
         function createImportCallExpressionCommonJS(arg, containsLexicalThis) {
-            // import("./blah")
-            // emit as
-            // Promise.resolve().then(function () { return require(x); }) /*CommonJs Require*/
-            // We have to wrap require in then callback so that require is done in asynchronously
-            // if we simply do require in resolve callback in Promise constructor. We will execute the loading immediately
-            var promiseResolveCall = ts.createCall(ts.createPropertyAccess(ts.createIdentifier("Promise"), "resolve"), /*typeArguments*/ undefined, /*argumentsArray*/ []);
-            var requireCall = ts.createCall(ts.createIdentifier("require"), /*typeArguments*/ undefined, arg ? [arg] : []);
+            var promiseResolveCall = ts.createCall(ts.createPropertyAccess(ts.createIdentifier("Promise"), "resolve"), undefined, []);
+            var requireCall = ts.createCall(ts.createIdentifier("require"), undefined, arg ? [arg] : []);
             if (compilerOptions.esModuleInterop) {
                 context.requestEmitHelper(importStarHelper);
-                requireCall = ts.createCall(ts.getHelperName("__importStar"), /*typeArguments*/ undefined, [requireCall]);
+                requireCall = ts.createCall(ts.getHelperName("__importStar"), undefined, [requireCall]);
             }
             var func;
-            if (languageVersion >= 2 /* ES2015 */) {
-                func = ts.createArrowFunction(
-                /*modifiers*/ undefined, 
-                /*typeParameters*/ undefined, 
-                /*parameters*/ [], 
-                /*type*/ undefined, 
-                /*equalsGreaterThanToken*/ undefined, requireCall);
+            if (languageVersion >= 2) {
+                func = ts.createArrowFunction(undefined, undefined, [], undefined, undefined, requireCall);
             }
             else {
-                func = ts.createFunctionExpression(
-                /*modifiers*/ undefined, 
-                /*asteriskToken*/ undefined, 
-                /*name*/ undefined, 
-                /*typeParameters*/ undefined, 
-                /*parameters*/ [], 
-                /*type*/ undefined, ts.createBlock([ts.createReturn(requireCall)]));
-                // if there is a lexical 'this' in the import call arguments, ensure we indicate
-                // that this new function expression indicates it captures 'this' so that the
-                // es2015 transformer will properly substitute 'this' with '_this'.
+                func = ts.createFunctionExpression(undefined, undefined, undefined, undefined, [], undefined, ts.createBlock([ts.createReturn(requireCall)]));
                 if (containsLexicalThis) {
-                    ts.setEmitFlags(func, 8 /* CapturesThis */);
+                    ts.setEmitFlags(func, 8);
                 }
             }
-            return ts.createCall(ts.createPropertyAccess(promiseResolveCall, "then"), /*typeArguments*/ undefined, [func]);
+            return ts.createCall(ts.createPropertyAccess(promiseResolveCall, "then"), undefined, [func]);
         }
         function getHelperExpressionForImport(node, innerExpr) {
-            if (!compilerOptions.esModuleInterop || ts.getEmitFlags(node) & 67108864 /* NeverApplyImportHelper */) {
+            if (!compilerOptions.esModuleInterop || ts.getEmitFlags(node) & 67108864) {
                 return innerExpr;
             }
             if (ts.getImportNeedsImportStarHelper(node)) {
                 context.requestEmitHelper(importStarHelper);
-                return ts.createCall(ts.getHelperName("__importStar"), /*typeArguments*/ undefined, [innerExpr]);
+                return ts.createCall(ts.getHelperName("__importStar"), undefined, [innerExpr]);
             }
             if (ts.getImportNeedsImportDefaultHelper(node)) {
                 context.requestEmitHelper(importDefaultHelper);
-                return ts.createCall(ts.getHelperName("__importDefault"), /*typeArguments*/ undefined, [innerExpr]);
+                return ts.createCall(ts.getHelperName("__importDefault"), undefined, [innerExpr]);
             }
             return innerExpr;
         }
-        /**
-         * Visits an ImportDeclaration node.
-         *
-         * @param node The node to visit.
-         */
         function visitImportDeclaration(node) {
             var statements;
             var namespaceDeclaration = ts.getNamespaceDeclarationNode(node);
             if (moduleKind !== ts.ModuleKind.AMD) {
                 if (!node.importClause) {
-                    // import "mod";
                     return ts.setTextRange(ts.createStatement(createRequireCall(node)), node);
                 }
                 else {
                     var variables = [];
                     if (namespaceDeclaration && !ts.isDefaultImport(node)) {
-                        // import * as n from "mod";
-                        variables.push(ts.createVariableDeclaration(ts.getSynthesizedClone(namespaceDeclaration.name), 
-                        /*type*/ undefined, getHelperExpressionForImport(node, createRequireCall(node))));
+                        variables.push(ts.createVariableDeclaration(ts.getSynthesizedClone(namespaceDeclaration.name), undefined, getHelperExpressionForImport(node, createRequireCall(node))));
                     }
                     else {
-                        // import d from "mod";
-                        // import { x, y } from "mod";
-                        // import d, { x, y } from "mod";
-                        // import d, * as n from "mod";
-                        variables.push(ts.createVariableDeclaration(ts.getGeneratedNameForNode(node), 
-                        /*type*/ undefined, getHelperExpressionForImport(node, createRequireCall(node))));
+                        variables.push(ts.createVariableDeclaration(ts.getGeneratedNameForNode(node), undefined, getHelperExpressionForImport(node, createRequireCall(node))));
                         if (namespaceDeclaration && ts.isDefaultImport(node)) {
-                            variables.push(ts.createVariableDeclaration(ts.getSynthesizedClone(namespaceDeclaration.name), 
-                            /*type*/ undefined, ts.getGeneratedNameForNode(node)));
+                            variables.push(ts.createVariableDeclaration(ts.getSynthesizedClone(namespaceDeclaration.name), undefined, ts.getGeneratedNameForNode(node)));
                         }
                     }
-                    statements = ts.append(statements, ts.setTextRange(ts.createVariableStatement(
-                    /*modifiers*/ undefined, ts.createVariableDeclarationList(variables, languageVersion >= 2 /* ES2015 */ ? 2 /* Const */ : 0 /* None */)), 
-                    /*location*/ node));
+                    statements = ts.append(statements, ts.setTextRange(ts.createVariableStatement(undefined, ts.createVariableDeclarationList(variables, languageVersion >= 2 ? 2 : 0)), node));
                 }
             }
             else if (namespaceDeclaration && ts.isDefaultImport(node)) {
-                // import d, * as n from "mod";
-                statements = ts.append(statements, ts.createVariableStatement(
-                /*modifiers*/ undefined, ts.createVariableDeclarationList([
-                    ts.setTextRange(ts.createVariableDeclaration(ts.getSynthesizedClone(namespaceDeclaration.name), 
-                    /*type*/ undefined, ts.getGeneratedNameForNode(node)), 
-                    /*location*/ node)
-                ], languageVersion >= 2 /* ES2015 */ ? 2 /* Const */ : 0 /* None */)));
+                statements = ts.append(statements, ts.createVariableStatement(undefined, ts.createVariableDeclarationList([
+                    ts.setTextRange(ts.createVariableDeclaration(ts.getSynthesizedClone(namespaceDeclaration.name), undefined, ts.getGeneratedNameForNode(node)), node)
+                ], languageVersion >= 2 ? 2 : 0)));
             }
             if (hasAssociatedEndOfDeclarationMarker(node)) {
-                // Defer exports until we encounter an EndOfDeclarationMarker node
                 var id = ts.getOriginalNodeId(node);
                 deferredExports[id] = appendExportsOfImportDeclaration(deferredExports[id], node);
             }
@@ -72102,47 +58217,33 @@ var ts;
             }
             return ts.singleOrMany(statements);
         }
-        /**
-         * Creates a `require()` call to import an external module.
-         *
-         * @param importNode The declararation to import.
-         */
         function createRequireCall(importNode) {
             var moduleName = ts.getExternalModuleNameLiteral(importNode, currentSourceFile, host, resolver, compilerOptions);
             var args = [];
             if (moduleName) {
                 args.push(moduleName);
             }
-            return ts.createCall(ts.createIdentifier("require"), /*typeArguments*/ undefined, args);
+            return ts.createCall(ts.createIdentifier("require"), undefined, args);
         }
-        /**
-         * Visits an ImportEqualsDeclaration node.
-         *
-         * @param node The node to visit.
-         */
         function visitImportEqualsDeclaration(node) {
             ts.Debug.assert(ts.isExternalModuleImportEqualsDeclaration(node), "import= for internal module references should be handled in an earlier transformer.");
             var statements;
             if (moduleKind !== ts.ModuleKind.AMD) {
-                if (ts.hasModifier(node, 1 /* Export */)) {
+                if (ts.hasModifier(node, 1)) {
                     statements = ts.append(statements, ts.setTextRange(ts.createStatement(createExportExpression(node.name, createRequireCall(node))), node));
                 }
                 else {
-                    statements = ts.append(statements, ts.setTextRange(ts.createVariableStatement(
-                    /*modifiers*/ undefined, ts.createVariableDeclarationList([
-                        ts.createVariableDeclaration(ts.getSynthesizedClone(node.name), 
-                        /*type*/ undefined, createRequireCall(node))
-                    ], 
-                    /*flags*/ languageVersion >= 2 /* ES2015 */ ? 2 /* Const */ : 0 /* None */)), node));
+                    statements = ts.append(statements, ts.setTextRange(ts.createVariableStatement(undefined, ts.createVariableDeclarationList([
+                        ts.createVariableDeclaration(ts.getSynthesizedClone(node.name), undefined, createRequireCall(node))
+                    ], languageVersion >= 2 ? 2 : 0)), node));
                 }
             }
             else {
-                if (ts.hasModifier(node, 1 /* Export */)) {
+                if (ts.hasModifier(node, 1)) {
                     statements = ts.append(statements, ts.setTextRange(ts.createStatement(createExportExpression(ts.getExportName(node), ts.getLocalName(node))), node));
                 }
             }
             if (hasAssociatedEndOfDeclarationMarker(node)) {
-                // Defer exports until we encounter an EndOfDeclarationMarker node
                 var id = ts.getOriginalNodeId(node);
                 deferredExports[id] = appendExportsOfImportEqualsDeclaration(deferredExports[id], node);
             }
@@ -72151,28 +58252,17 @@ var ts;
             }
             return ts.singleOrMany(statements);
         }
-        /**
-         * Visits an ExportDeclaration node.
-         *
-         * @param The node to visit.
-         */
         function visitExportDeclaration(node) {
             if (!node.moduleSpecifier) {
-                // Elide export declarations with no module specifier as they are handled
-                // elsewhere.
                 return undefined;
             }
             var generatedName = ts.getGeneratedNameForNode(node);
             if (node.exportClause) {
                 var statements = [];
-                // export { x, y } from "mod";
                 if (moduleKind !== ts.ModuleKind.AMD) {
-                    statements.push(ts.setTextRange(ts.createVariableStatement(
-                    /*modifiers*/ undefined, ts.createVariableDeclarationList([
-                        ts.createVariableDeclaration(generatedName, 
-                        /*type*/ undefined, createRequireCall(node))
-                    ])), 
-                    /*location*/ node));
+                    statements.push(ts.setTextRange(ts.createVariableStatement(undefined, ts.createVariableDeclarationList([
+                        ts.createVariableDeclaration(generatedName, undefined, createRequireCall(node))
+                    ])), node));
                 }
                 for (var _i = 0, _a = node.exportClause.elements; _i < _a.length; _i++) {
                     var specifier = _a[_i];
@@ -72182,15 +58272,9 @@ var ts;
                 return ts.singleOrMany(statements);
             }
             else {
-                // export * from "mod";
                 return ts.setTextRange(ts.createStatement(createExportStarHelper(context, moduleKind !== ts.ModuleKind.AMD ? createRequireCall(node) : generatedName)), node);
             }
         }
-        /**
-         * Visits an ExportAssignment node.
-         *
-         * @param node The node to visit.
-         */
         function visitExportAssignment(node) {
             if (node.isExportEquals) {
                 return undefined;
@@ -72198,35 +58282,23 @@ var ts;
             var statements;
             var original = node.original;
             if (original && hasAssociatedEndOfDeclarationMarker(original)) {
-                // Defer exports until we encounter an EndOfDeclarationMarker node
                 var id = ts.getOriginalNodeId(node);
-                deferredExports[id] = appendExportStatement(deferredExports[id], ts.createIdentifier("default"), ts.visitNode(node.expression, moduleExpressionElementVisitor), /*location*/ node, /*allowComments*/ true);
+                deferredExports[id] = appendExportStatement(deferredExports[id], ts.createIdentifier("default"), ts.visitNode(node.expression, moduleExpressionElementVisitor), node, true);
             }
             else {
-                statements = appendExportStatement(statements, ts.createIdentifier("default"), ts.visitNode(node.expression, moduleExpressionElementVisitor), /*location*/ node, /*allowComments*/ true);
+                statements = appendExportStatement(statements, ts.createIdentifier("default"), ts.visitNode(node.expression, moduleExpressionElementVisitor), node, true);
             }
             return ts.singleOrMany(statements);
         }
-        /**
-         * Visits a FunctionDeclaration node.
-         *
-         * @param node The node to visit.
-         */
         function visitFunctionDeclaration(node) {
             var statements;
-            if (ts.hasModifier(node, 1 /* Export */)) {
-                statements = ts.append(statements, ts.setOriginalNode(ts.setTextRange(ts.createFunctionDeclaration(
-                /*decorators*/ undefined, ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), node.asteriskToken, ts.getDeclarationName(node, /*allowComments*/ true, /*allowSourceMaps*/ true), 
-                /*typeParameters*/ undefined, ts.visitNodes(node.parameters, moduleExpressionElementVisitor), 
-                /*type*/ undefined, ts.visitEachChild(node.body, moduleExpressionElementVisitor, context)), 
-                /*location*/ node), 
-                /*original*/ node));
+            if (ts.hasModifier(node, 1)) {
+                statements = ts.append(statements, ts.setOriginalNode(ts.setTextRange(ts.createFunctionDeclaration(undefined, ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), node.asteriskToken, ts.getDeclarationName(node, true, true), undefined, ts.visitNodes(node.parameters, moduleExpressionElementVisitor), undefined, ts.visitEachChild(node.body, moduleExpressionElementVisitor, context)), node), node));
             }
             else {
                 statements = ts.append(statements, ts.visitEachChild(node, moduleExpressionElementVisitor, context));
             }
             if (hasAssociatedEndOfDeclarationMarker(node)) {
-                // Defer exports until we encounter an EndOfDeclarationMarker node
                 var id = ts.getOriginalNodeId(node);
                 deferredExports[id] = appendExportsOfHoistedDeclaration(deferredExports[id], node);
             }
@@ -72235,23 +58307,15 @@ var ts;
             }
             return ts.singleOrMany(statements);
         }
-        /**
-         * Visits a ClassDeclaration node.
-         *
-         * @param node The node to visit.
-         */
         function visitClassDeclaration(node) {
             var statements;
-            if (ts.hasModifier(node, 1 /* Export */)) {
-                statements = ts.append(statements, ts.setOriginalNode(ts.setTextRange(ts.createClassDeclaration(
-                /*decorators*/ undefined, ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), ts.getDeclarationName(node, /*allowComments*/ true, /*allowSourceMaps*/ true), 
-                /*typeParameters*/ undefined, ts.visitNodes(node.heritageClauses, moduleExpressionElementVisitor), ts.visitNodes(node.members, moduleExpressionElementVisitor)), node), node));
+            if (ts.hasModifier(node, 1)) {
+                statements = ts.append(statements, ts.setOriginalNode(ts.setTextRange(ts.createClassDeclaration(undefined, ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), ts.getDeclarationName(node, true, true), undefined, ts.visitNodes(node.heritageClauses, moduleExpressionElementVisitor), ts.visitNodes(node.members, moduleExpressionElementVisitor)), node), node));
             }
             else {
                 statements = ts.append(statements, ts.visitEachChild(node, moduleExpressionElementVisitor, context));
             }
             if (hasAssociatedEndOfDeclarationMarker(node)) {
-                // Defer exports until we encounter an EndOfDeclarationMarker node
                 var id = ts.getOriginalNodeId(node);
                 deferredExports[id] = appendExportsOfHoistedDeclaration(deferredExports[id], node);
             }
@@ -72260,19 +58324,12 @@ var ts;
             }
             return ts.singleOrMany(statements);
         }
-        /**
-         * Visits a VariableStatement node.
-         *
-         * @param node The node to visit.
-         */
         function visitVariableStatement(node) {
             var statements;
             var variables;
             var expressions;
-            if (ts.hasModifier(node, 1 /* Export */)) {
+            if (ts.hasModifier(node, 1)) {
                 var modifiers = void 0;
-                // If we're exporting these variables, then these just become assignments to 'exports.x'.
-                // We only want to emit assignments for variables with initializers.
                 for (var _i = 0, _a = node.declarationList.declarations; _i < _a.length; _i++) {
                     var variable = _a[_i];
                     if (ts.isIdentifier(variable.name) && ts.isLocalName(variable.name)) {
@@ -72296,7 +58353,6 @@ var ts;
                 statements = ts.append(statements, ts.visitEachChild(node, moduleExpressionElementVisitor, context));
             }
             if (hasAssociatedEndOfDeclarationMarker(node)) {
-                // Defer exports until we encounter an EndOfDeclarationMarker node
                 var id = ts.getOriginalNodeId(node);
                 deferredExports[id] = appendExportsOfVariableStatement(deferredExports[id], node);
             }
@@ -72308,72 +58364,35 @@ var ts;
         function createAllExportExpressions(name, value, location) {
             var exportedNames = getExports(name);
             if (exportedNames) {
-                // For each additional export of the declaration, apply an export assignment.
                 var expression = ts.isExportName(name) ? value : ts.createAssignment(name, value);
                 for (var _i = 0, exportedNames_1 = exportedNames; _i < exportedNames_1.length; _i++) {
                     var exportName = exportedNames_1[_i];
-                    // Mark the node to prevent triggering substitution.
-                    ts.setEmitFlags(expression, 4 /* NoSubstitution */);
-                    expression = createExportExpression(exportName, expression, /*location*/ location);
+                    ts.setEmitFlags(expression, 4);
+                    expression = createExportExpression(exportName, expression, location);
                 }
                 return expression;
             }
             return ts.createAssignment(name, value);
         }
-        /**
-         * Transforms an exported variable with an initializer into an expression.
-         *
-         * @param node The node to transform.
-         */
         function transformInitializedVariable(node) {
             if (ts.isBindingPattern(node.name)) {
-                return ts.flattenDestructuringAssignment(ts.visitNode(node, moduleExpressionElementVisitor), 
-                /*visitor*/ undefined, context, 0 /* All */, 
-                /*needsValue*/ false, createAllExportExpressions);
+                return ts.flattenDestructuringAssignment(ts.visitNode(node, moduleExpressionElementVisitor), undefined, context, 0, false, createAllExportExpressions);
             }
             else {
-                return ts.createAssignment(ts.setTextRange(ts.createPropertyAccess(ts.createIdentifier("exports"), node.name), 
-                /*location*/ node.name), ts.visitNode(node.initializer, moduleExpressionElementVisitor));
+                return ts.createAssignment(ts.setTextRange(ts.createPropertyAccess(ts.createIdentifier("exports"), node.name), node.name), ts.visitNode(node.initializer, moduleExpressionElementVisitor));
             }
         }
-        /**
-         * Visits a MergeDeclarationMarker used as a placeholder for the beginning of a merged
-         * and transformed declaration.
-         *
-         * @param node The node to visit.
-         */
         function visitMergeDeclarationMarker(node) {
-            // For an EnumDeclaration or ModuleDeclaration that merges with a preceeding
-            // declaration we do not emit a leading variable declaration. To preserve the
-            // begin/end semantics of the declararation and to properly handle exports
-            // we wrapped the leading variable declaration in a `MergeDeclarationMarker`.
-            //
-            // To balance the declaration, add the exports of the elided variable
-            // statement.
-            if (hasAssociatedEndOfDeclarationMarker(node) && node.original.kind === 214 /* VariableStatement */) {
+            if (hasAssociatedEndOfDeclarationMarker(node) && node.original.kind === 214) {
                 var id = ts.getOriginalNodeId(node);
                 deferredExports[id] = appendExportsOfVariableStatement(deferredExports[id], node.original);
             }
             return node;
         }
-        /**
-         * Determines whether a node has an associated EndOfDeclarationMarker.
-         *
-         * @param node The node to test.
-         */
         function hasAssociatedEndOfDeclarationMarker(node) {
-            return (ts.getEmitFlags(node) & 4194304 /* HasEndOfDeclarationMarker */) !== 0;
-        }
-        /**
-         * Visits a DeclarationMarker used as a placeholder for the end of a transformed
-         * declaration.
-         *
-         * @param node The node to visit.
-         */
+            return (ts.getEmitFlags(node) & 4194304) !== 0;
+        }
         function visitEndOfDeclarationMarker(node) {
-            // For some transformations we emit an `EndOfDeclarationMarker` to mark the actual
-            // end of the transformed declaration. We use this marker to emit any deferred exports
-            // of the declaration.
             var id = ts.getOriginalNodeId(node);
             var statements = deferredExports[id];
             if (statements) {
@@ -72382,15 +58401,6 @@ var ts;
             }
             return node;
         }
-        /**
-         * Appends the exports of an ImportDeclaration to a statement list, returning the
-         * statement list.
-         *
-         * @param statements A statement list to which the down-level export statements are to be
-         * appended. If `statements` is `undefined`, a new array is allocated if statements are
-         * appended.
-         * @param decl The declaration whose exports are to be recorded.
-         */
         function appendExportsOfImportDeclaration(statements, decl) {
             if (currentModuleInfo.exportEquals) {
                 return statements;
@@ -72405,10 +58415,10 @@ var ts;
             var namedBindings = importClause.namedBindings;
             if (namedBindings) {
                 switch (namedBindings.kind) {
-                    case 246 /* NamespaceImport */:
+                    case 246:
                         statements = appendExportsOfDeclaration(statements, namedBindings);
                         break;
-                    case 247 /* NamedImports */:
+                    case 247:
                         for (var _i = 0, _a = namedBindings.elements; _i < _a.length; _i++) {
                             var importBinding = _a[_i];
                             statements = appendExportsOfDeclaration(statements, importBinding);
@@ -72418,30 +58428,12 @@ var ts;
             }
             return statements;
         }
-        /**
-         * Appends the exports of an ImportEqualsDeclaration to a statement list, returning the
-         * statement list.
-         *
-         * @param statements A statement list to which the down-level export statements are to be
-         * appended. If `statements` is `undefined`, a new array is allocated if statements are
-         * appended.
-         * @param decl The declaration whose exports are to be recorded.
-         */
         function appendExportsOfImportEqualsDeclaration(statements, decl) {
             if (currentModuleInfo.exportEquals) {
                 return statements;
             }
             return appendExportsOfDeclaration(statements, decl);
         }
-        /**
-         * Appends the exports of a VariableStatement to a statement list, returning the statement
-         * list.
-         *
-         * @param statements A statement list to which the down-level export statements are to be
-         * appended. If `statements` is `undefined`, a new array is allocated if statements are
-         * appended.
-         * @param node The VariableStatement whose exports are to be recorded.
-         */
         function appendExportsOfVariableStatement(statements, node) {
             if (currentModuleInfo.exportEquals) {
                 return statements;
@@ -72452,15 +58444,6 @@ var ts;
             }
             return statements;
         }
-        /**
-         * Appends the exports of a VariableDeclaration or BindingElement to a statement list,
-         * returning the statement list.
-         *
-         * @param statements A statement list to which the down-level export statements are to be
-         * appended. If `statements` is `undefined`, a new array is allocated if statements are
-         * appended.
-         * @param decl The declaration whose exports are to be recorded.
-         */
         function appendExportsOfBindingElement(statements, decl) {
             if (currentModuleInfo.exportEquals) {
                 return statements;
@@ -72478,136 +58461,72 @@ var ts;
             }
             return statements;
         }
-        /**
-         * Appends the exports of a ClassDeclaration or FunctionDeclaration to a statement list,
-         * returning the statement list.
-         *
-         * @param statements A statement list to which the down-level export statements are to be
-         * appended. If `statements` is `undefined`, a new array is allocated if statements are
-         * appended.
-         * @param decl The declaration whose exports are to be recorded.
-         */
         function appendExportsOfHoistedDeclaration(statements, decl) {
             if (currentModuleInfo.exportEquals) {
                 return statements;
             }
-            if (ts.hasModifier(decl, 1 /* Export */)) {
-                var exportName = ts.hasModifier(decl, 512 /* Default */) ? ts.createIdentifier("default") : ts.getDeclarationName(decl);
-                statements = appendExportStatement(statements, exportName, ts.getLocalName(decl), /*location*/ decl);
+            if (ts.hasModifier(decl, 1)) {
+                var exportName = ts.hasModifier(decl, 512) ? ts.createIdentifier("default") : ts.getDeclarationName(decl);
+                statements = appendExportStatement(statements, exportName, ts.getLocalName(decl), decl);
             }
             if (decl.name) {
                 statements = appendExportsOfDeclaration(statements, decl);
             }
             return statements;
         }
-        /**
-         * Appends the exports of a declaration to a statement list, returning the statement list.
-         *
-         * @param statements A statement list to which the down-level export statements are to be
-         * appended. If `statements` is `undefined`, a new array is allocated if statements are
-         * appended.
-         * @param decl The declaration to export.
-         */
         function appendExportsOfDeclaration(statements, decl) {
             var name = ts.getDeclarationName(decl);
             var exportSpecifiers = currentModuleInfo.exportSpecifiers.get(ts.idText(name));
             if (exportSpecifiers) {
                 for (var _i = 0, exportSpecifiers_1 = exportSpecifiers; _i < exportSpecifiers_1.length; _i++) {
                     var exportSpecifier = exportSpecifiers_1[_i];
-                    statements = appendExportStatement(statements, exportSpecifier.name, name, /*location*/ exportSpecifier.name);
+                    statements = appendExportStatement(statements, exportSpecifier.name, name, exportSpecifier.name);
                 }
             }
             return statements;
         }
-        /**
-         * Appends the down-level representation of an export to a statement list, returning the
-         * statement list.
-         *
-         * @param statements A statement list to which the down-level export statements are to be
-         * appended. If `statements` is `undefined`, a new array is allocated if statements are
-         * appended.
-         * @param exportName The name of the export.
-         * @param expression The expression to export.
-         * @param location The location to use for source maps and comments for the export.
-         * @param allowComments Whether to allow comments on the export.
-         */
         function appendExportStatement(statements, exportName, expression, location, allowComments) {
             statements = ts.append(statements, createExportStatement(exportName, expression, location, allowComments));
             return statements;
         }
         function createUnderscoreUnderscoreESModule() {
             var statement;
-            if (languageVersion === 0 /* ES3 */) {
-                statement = ts.createStatement(createExportExpression(ts.createIdentifier("__esModule"), ts.createLiteral(/*value*/ true)));
+            if (languageVersion === 0) {
+                statement = ts.createStatement(createExportExpression(ts.createIdentifier("__esModule"), ts.createLiteral(true)));
             }
             else {
-                statement = ts.createStatement(ts.createCall(ts.createPropertyAccess(ts.createIdentifier("Object"), "defineProperty"), 
-                /*typeArguments*/ undefined, [
+                statement = ts.createStatement(ts.createCall(ts.createPropertyAccess(ts.createIdentifier("Object"), "defineProperty"), undefined, [
                     ts.createIdentifier("exports"),
                     ts.createLiteral("__esModule"),
                     ts.createObjectLiteral([
-                        ts.createPropertyAssignment("value", ts.createLiteral(/*value*/ true))
+                        ts.createPropertyAssignment("value", ts.createLiteral(true))
                     ])
                 ]));
             }
-            ts.setEmitFlags(statement, 1048576 /* CustomPrologue */);
+            ts.setEmitFlags(statement, 1048576);
             return statement;
         }
-        /**
-         * Creates a call to the current file's export function to export a value.
-         *
-         * @param name The bound name of the export.
-         * @param value The exported value.
-         * @param location The location to use for source maps and comments for the export.
-         * @param allowComments An optional value indicating whether to emit comments for the statement.
-         */
         function createExportStatement(name, value, location, allowComments) {
             var statement = ts.setTextRange(ts.createStatement(createExportExpression(name, value)), location);
             ts.startOnNewLine(statement);
             if (!allowComments) {
-                ts.setEmitFlags(statement, 1536 /* NoComments */);
+                ts.setEmitFlags(statement, 1536);
             }
             return statement;
         }
-        /**
-         * Creates a call to the current file's export function to export a value.
-         *
-         * @param name The bound name of the export.
-         * @param value The exported value.
-         * @param location The location to use for source maps and comments for the export.
-         */
         function createExportExpression(name, value, location) {
             return ts.setTextRange(ts.createAssignment(ts.createPropertyAccess(ts.createIdentifier("exports"), ts.getSynthesizedClone(name)), value), location);
         }
-        //
-        // Modifier Visitors
-        //
-        /**
-         * Visit nodes to elide module-specific modifiers.
-         *
-         * @param node The node to visit.
-         */
         function modifierVisitor(node) {
-            // Elide module-specific modifiers.
             switch (node.kind) {
-                case 84 /* ExportKeyword */:
-                case 79 /* DefaultKeyword */:
+                case 84:
+                case 79:
                     return undefined;
             }
             return node;
         }
-        //
-        // Emit Notification
-        //
-        /**
-         * Hook for node emit notifications.
-         *
-         * @param hint A hint as to the intended usage of the node.
-         * @param node The node to emit.
-         * @param emit A callback used to emit the node in the printer.
-         */
         function onEmitNode(hint, node, emitCallback) {
-            if (node.kind === 274 /* SourceFile */) {
+            if (node.kind === 274) {
                 currentSourceFile = node;
                 currentModuleInfo = moduleInfoMap[ts.getOriginalNodeId(currentSourceFile)];
                 noSubstitution = [];
@@ -72620,21 +58539,12 @@ var ts;
                 previousOnEmitNode(hint, node, emitCallback);
             }
         }
-        //
-        // Substitutions
-        //
-        /**
-         * Hooks node substitutions.
-         *
-         * @param hint A hint as to the intended usage of the node.
-         * @param node The node to substitute.
-         */
         function onSubstituteNode(hint, node) {
             node = previousOnSubstituteNode(hint, node);
             if (node.id && noSubstitution[node.id]) {
                 return node;
             }
-            if (hint === 1 /* Expression */) {
+            if (hint === 1) {
                 return substituteExpression(node);
             }
             else if (ts.isShorthandPropertyAssignment(node)) {
@@ -72642,18 +58552,10 @@ var ts;
             }
             return node;
         }
-        /**
-         * Substitution for a ShorthandPropertyAssignment whose declaration name is an imported
-         * or exported symbol.
-         *
-         * @param node The node to substitute.
-         */
         function substituteShorthandPropertyAssignment(node) {
             var name = node.name;
             var exportedOrImportedName = substituteExpressionIdentifier(name);
             if (exportedOrImportedName !== name) {
-                // A shorthand property with an assignment initializer is probably part of a
-                // destructuring assignment
                 if (node.objectAssignmentInitializer) {
                     var initializer = ts.createAssignment(exportedOrImportedName, node.objectAssignmentInitializer);
                     return ts.setTextRange(ts.createPropertyAssignment(name, initializer), node);
@@ -72662,31 +58564,20 @@ var ts;
             }
             return node;
         }
-        /**
-         * Substitution for an Expression that may contain an imported or exported symbol.
-         *
-         * @param node The node to substitute.
-         */
         function substituteExpression(node) {
             switch (node.kind) {
-                case 71 /* Identifier */:
+                case 71:
                     return substituteExpressionIdentifier(node);
-                case 200 /* BinaryExpression */:
+                case 200:
                     return substituteBinaryExpression(node);
-                case 199 /* PostfixUnaryExpression */:
-                case 198 /* PrefixUnaryExpression */:
+                case 199:
+                case 198:
                     return substituteUnaryExpression(node);
             }
             return node;
         }
-        /**
-         * Substitution for an Identifier expression that may contain an imported or exported
-         * symbol.
-         *
-         * @param node The node to substitute.
-         */
         function substituteExpressionIdentifier(node) {
-            if (ts.getEmitFlags(node) & 4096 /* HelperName */) {
+            if (ts.getEmitFlags(node) & 4096) {
                 var externalHelpersModuleName = ts.getExternalHelpersModuleName(currentSourceFile);
                 if (externalHelpersModuleName) {
                     return ts.createPropertyAccess(externalHelpersModuleName, node);
@@ -72695,39 +58586,23 @@ var ts;
             }
             if (!ts.isGeneratedIdentifier(node) && !ts.isLocalName(node)) {
                 var exportContainer = resolver.getReferencedExportContainer(node, ts.isExportName(node));
-                if (exportContainer && exportContainer.kind === 274 /* SourceFile */) {
-                    return ts.setTextRange(ts.createPropertyAccess(ts.createIdentifier("exports"), ts.getSynthesizedClone(node)), 
-                    /*location*/ node);
+                if (exportContainer && exportContainer.kind === 274) {
+                    return ts.setTextRange(ts.createPropertyAccess(ts.createIdentifier("exports"), ts.getSynthesizedClone(node)), node);
                 }
                 var importDeclaration = resolver.getReferencedImportDeclaration(node);
                 if (importDeclaration) {
                     if (ts.isImportClause(importDeclaration)) {
-                        return ts.setTextRange(ts.createPropertyAccess(ts.getGeneratedNameForNode(importDeclaration.parent), ts.createIdentifier("default")), 
-                        /*location*/ node);
+                        return ts.setTextRange(ts.createPropertyAccess(ts.getGeneratedNameForNode(importDeclaration.parent), ts.createIdentifier("default")), node);
                     }
                     else if (ts.isImportSpecifier(importDeclaration)) {
                         var name = importDeclaration.propertyName || importDeclaration.name;
-                        return ts.setTextRange(ts.createPropertyAccess(ts.getGeneratedNameForNode(importDeclaration.parent.parent.parent), ts.getSynthesizedClone(name)), 
-                        /*location*/ node);
+                        return ts.setTextRange(ts.createPropertyAccess(ts.getGeneratedNameForNode(importDeclaration.parent.parent.parent), ts.getSynthesizedClone(name)), node);
                     }
                 }
             }
             return node;
         }
-        /**
-         * Substitution for a BinaryExpression that may contain an imported or exported symbol.
-         *
-         * @param node The node to substitute.
-         */
         function substituteBinaryExpression(node) {
-            // When we see an assignment expression whose left-hand side is an exported symbol,
-            // we should ensure all exports of that symbol are updated with the correct value.
-            //
-            // - We do not substitute generated identifiers for any reason.
-            // - We do not substitute identifiers tagged with the LocalName flag.
-            // - We do not substitute identifiers that were originally the name of an enum or
-            //   namespace due to how they are transformed in TypeScript.
-            // - We only substitute identifiers that are exported at the top level.
             if (ts.isAssignmentOperator(node.operatorToken.kind)
                 && ts.isIdentifier(node.left)
                 && !ts.isGeneratedIdentifier(node.left)
@@ -72735,48 +58610,30 @@ var ts;
                 && !ts.isDeclarationNameOfEnumOrNamespace(node.left)) {
                 var exportedNames = getExports(node.left);
                 if (exportedNames) {
-                    // For each additional export of the declaration, apply an export assignment.
                     var expression = node;
                     for (var _i = 0, exportedNames_2 = exportedNames; _i < exportedNames_2.length; _i++) {
                         var exportName = exportedNames_2[_i];
-                        // Mark the node to prevent triggering this rule again.
                         noSubstitution[ts.getNodeId(expression)] = true;
-                        expression = createExportExpression(exportName, expression, /*location*/ node);
+                        expression = createExportExpression(exportName, expression, node);
                     }
                     return expression;
                 }
             }
             return node;
         }
-        /**
-         * Substitution for a UnaryExpression that may contain an imported or exported symbol.
-         *
-         * @param node The node to substitute.
-         */
         function substituteUnaryExpression(node) {
-            // When we see a prefix or postfix increment expression whose operand is an exported
-            // symbol, we should ensure all exports of that symbol are updated with the correct
-            // value.
-            //
-            // - We do not substitute generated identifiers for any reason.
-            // - We do not substitute identifiers tagged with the LocalName flag.
-            // - We do not substitute identifiers that were originally the name of an enum or
-            //   namespace due to how they are transformed in TypeScript.
-            // - We only substitute identifiers that are exported at the top level.
-            if ((node.operator === 43 /* PlusPlusToken */ || node.operator === 44 /* MinusMinusToken */)
+            if ((node.operator === 43 || node.operator === 44)
                 && ts.isIdentifier(node.operand)
                 && !ts.isGeneratedIdentifier(node.operand)
                 && !ts.isLocalName(node.operand)
                 && !ts.isDeclarationNameOfEnumOrNamespace(node.operand)) {
                 var exportedNames = getExports(node.operand);
                 if (exportedNames) {
-                    var expression = node.kind === 199 /* PostfixUnaryExpression */
-                        ? ts.setTextRange(ts.createBinary(node.operand, ts.createToken(node.operator === 43 /* PlusPlusToken */ ? 59 /* PlusEqualsToken */ : 60 /* MinusEqualsToken */), ts.createLiteral(1)), 
-                        /*location*/ node)
+                    var expression = node.kind === 199
+                        ? ts.setTextRange(ts.createBinary(node.operand, ts.createToken(node.operator === 43 ? 59 : 60), ts.createLiteral(1)), node)
                         : node;
                     for (var _i = 0, exportedNames_3 = exportedNames; _i < exportedNames_3.length; _i++) {
                         var exportName = exportedNames_3[_i];
-                        // Mark the node to prevent triggering this rule again.
                         noSubstitution[ts.getNodeId(expression)] = true;
                         expression = createExportExpression(exportName, expression);
                     }
@@ -72785,11 +58642,6 @@ var ts;
             }
             return node;
         }
-        /**
-         * Gets the additional exports of a name.
-         *
-         * @param name The name.
-         */
         function getExports(name) {
             if (!ts.isGeneratedIdentifier(name)) {
                 var valueDeclaration = resolver.getReferencedImportDeclaration(name)
@@ -72802,7 +58654,6 @@ var ts;
         }
     }
     ts.transformModule = transformModule;
-    // emit output for the __export helper function
     var exportStarHelper = {
         name: "typescript:export-star",
         scoped: true,
@@ -72811,29 +58662,25 @@ var ts;
     function createExportStarHelper(context, module) {
         var compilerOptions = context.getCompilerOptions();
         return compilerOptions.importHelpers
-            ? ts.createCall(ts.getHelperName("__exportStar"), /*typeArguments*/ undefined, [module, ts.createIdentifier("exports")])
-            : ts.createCall(ts.createIdentifier("__export"), /*typeArguments*/ undefined, [module]);
+            ? ts.createCall(ts.getHelperName("__exportStar"), undefined, [module, ts.createIdentifier("exports")])
+            : ts.createCall(ts.createIdentifier("__export"), undefined, [module]);
     }
-    // emit helper for dynamic import
     var dynamicImportUMDHelper = {
         name: "typescript:dynamicimport-sync-require",
         scoped: true,
         text: "\n            var __syncRequire = typeof module === \"object\" && typeof module.exports === \"object\";"
     };
-    // emit helper for `import * as Name from "foo"`
     var importStarHelper = {
         name: "typescript:commonjsimportstar",
         scoped: false,
         text: "\nvar __importStar = (this && this.__importStar) || function (mod) {\n    if (mod && mod.__esModule) return mod;\n    var result = {};\n    if (mod != null) for (var k in mod) if (Object.hasOwnProperty.call(mod, k)) result[k] = mod[k];\n    result[\"default\"] = mod;\n    return result;\n};"
     };
-    // emit helper for `import Name from "foo"`
     var importDefaultHelper = {
         name: "typescript:commonjsimportdefault",
         scoped: false,
         text: "\nvar __importDefault = (this && this.__importDefault) || function (mod) {\n    return (mod && mod.__esModule) ? mod : { \"default\": mod };\n};"
     };
 })(ts || (ts = {}));
-/*@internal*/
 var ts;
 (function (ts) {
     function transformSystemModule(context) {
@@ -72845,78 +58692,48 @@ var ts;
         var previousOnEmitNode = context.onEmitNode;
         context.onSubstituteNode = onSubstituteNode;
         context.onEmitNode = onEmitNode;
-        context.enableSubstitution(71 /* Identifier */); // Substitutes expression identifiers for imported symbols.
-        context.enableSubstitution(271 /* ShorthandPropertyAssignment */); // Substitutes expression identifiers for imported symbols
-        context.enableSubstitution(200 /* BinaryExpression */); // Substitutes assignments to exported symbols.
-        context.enableSubstitution(198 /* PrefixUnaryExpression */); // Substitutes updates to exported symbols.
-        context.enableSubstitution(199 /* PostfixUnaryExpression */); // Substitutes updates to exported symbols.
-        context.enableEmitNotification(274 /* SourceFile */); // Restore state when substituting nodes in a file.
-        var moduleInfoMap = []; // The ExternalModuleInfo for each file.
-        var deferredExports = []; // Exports to defer until an EndOfDeclarationMarker is found.
-        var exportFunctionsMap = []; // The export function associated with a source file.
-        var noSubstitutionMap = []; // Set of nodes for which substitution rules should be ignored for each file.
-        var currentSourceFile; // The current file.
-        var moduleInfo; // ExternalModuleInfo for the current file.
-        var exportFunction; // The export function for the current file.
-        var contextObject; // The context object for the current file.
+        context.enableSubstitution(71);
+        context.enableSubstitution(271);
+        context.enableSubstitution(200);
+        context.enableSubstitution(198);
+        context.enableSubstitution(199);
+        context.enableEmitNotification(274);
+        var moduleInfoMap = [];
+        var deferredExports = [];
+        var exportFunctionsMap = [];
+        var noSubstitutionMap = [];
+        var currentSourceFile;
+        var moduleInfo;
+        var exportFunction;
+        var contextObject;
         var hoistedStatements;
         var enclosingBlockScopedContainer;
-        var noSubstitution; // Set of nodes for which substitution rules should be ignored.
+        var noSubstitution;
         return ts.chainBundle(transformSourceFile);
-        /**
-         * Transforms the module aspects of a SourceFile.
-         *
-         * @param node The SourceFile node.
-         */
         function transformSourceFile(node) {
-            if (node.isDeclarationFile || !(ts.isEffectiveExternalModule(node, compilerOptions) || node.transformFlags & 67108864 /* ContainsDynamicImport */)) {
+            if (node.isDeclarationFile || !(ts.isEffectiveExternalModule(node, compilerOptions) || node.transformFlags & 67108864)) {
                 return node;
             }
             var id = ts.getOriginalNodeId(node);
             currentSourceFile = node;
             enclosingBlockScopedContainer = node;
-            // System modules have the following shape:
-            //
-            //     System.register(['dep-1', ... 'dep-n'], function(exports) {/* module body function */})
-            //
-            // The parameter 'exports' here is a callback '<T>(name: string, value: T) => T' that
-            // is used to publish exported values. 'exports' returns its 'value' argument so in
-            // most cases expressions that mutate exported values can be rewritten as:
-            //
-            //     expr -> exports('name', expr)
-            //
-            // The only exception in this rule is postfix unary operators,
-            // see comment to 'substitutePostfixUnaryExpression' for more details
-            // Collect information about the external module and dependency groups.
             moduleInfo = moduleInfoMap[id] = ts.collectExternalModuleInfo(node, resolver, compilerOptions);
-            // Make sure that the name of the 'exports' function does not conflict with
-            // existing identifiers.
             exportFunction = ts.createUniqueName("exports");
             exportFunctionsMap[id] = exportFunction;
             contextObject = ts.createUniqueName("context");
-            // Add the body of the module.
             var dependencyGroups = collectDependencyGroups(moduleInfo.externalImports);
             var moduleBodyBlock = createSystemModuleBody(node, dependencyGroups);
-            var moduleBodyFunction = ts.createFunctionExpression(
-            /*modifiers*/ undefined, 
-            /*asteriskToken*/ undefined, 
-            /*name*/ undefined, 
-            /*typeParameters*/ undefined, [
-                ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, exportFunction),
-                ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, contextObject)
-            ], 
-            /*type*/ undefined, moduleBodyBlock);
-            // Write the call to `System.register`
-            // Clear the emit-helpers flag for later passes since we'll have already used it in the module body
-            // So the helper will be emit at the correct position instead of at the top of the source-file
+            var moduleBodyFunction = ts.createFunctionExpression(undefined, undefined, undefined, undefined, [
+                ts.createParameter(undefined, undefined, undefined, exportFunction),
+                ts.createParameter(undefined, undefined, undefined, contextObject)
+            ], undefined, moduleBodyBlock);
             var moduleName = ts.tryGetModuleNameFromFile(node, host, compilerOptions);
             var dependencies = ts.createArrayLiteral(ts.map(dependencyGroups, function (dependencyGroup) { return dependencyGroup.name; }));
             var updated = ts.setEmitFlags(ts.updateSourceFileNode(node, ts.setTextRange(ts.createNodeArray([
-                ts.createStatement(ts.createCall(ts.createPropertyAccess(ts.createIdentifier("System"), "register"), 
-                /*typeArguments*/ undefined, moduleName
+                ts.createStatement(ts.createCall(ts.createPropertyAccess(ts.createIdentifier("System"), "register"), undefined, moduleName
                     ? [moduleName, dependencies, moduleBodyFunction]
                     : [dependencies, moduleBodyFunction]))
-            ]), node.statements)), 1024 /* NoTrailingComments */);
+            ]), node.statements)), 1024);
             if (!(compilerOptions.outFile || compilerOptions.out)) {
                 ts.moveEmitHelpers(updated, moduleBodyBlock, function (helper) { return !helper.scoped; });
             }
@@ -72932,11 +58749,6 @@ var ts;
             enclosingBlockScopedContainer = undefined;
             return ts.aggregateTransformFlags(updated);
         }
-        /**
-         * Collects the dependency groups for this files imports.
-         *
-         * @param externalImports The imports for the file.
-         */
         function collectDependencyGroups(externalImports) {
             var groupIndices = ts.createMap();
             var dependencyGroups = [];
@@ -72947,7 +58759,6 @@ var ts;
                     var text = externalModuleName.text;
                     var groupIndex = groupIndices.get(text);
                     if (groupIndex !== undefined) {
-                        // deduplicate/group entries in dependency list by the dependency name
                         dependencyGroups[groupIndex].externalImports.push(externalImport);
                     }
                     else {
@@ -72961,124 +58772,42 @@ var ts;
             }
             return dependencyGroups;
         }
-        /**
-         * Adds the statements for the module body function for the source file.
-         *
-         * @param node The source file for the module.
-         * @param dependencyGroups The grouped dependencies of the module.
-         */
         function createSystemModuleBody(node, dependencyGroups) {
-            // Shape of the body in system modules:
-            //
-            //  function (exports) {
-            //      <list of local aliases for imports>
-            //      <hoisted variable declarations>
-            //      <hoisted function declarations>
-            //      return {
-            //          setters: [
-            //              <list of setter function for imports>
-            //          ],
-            //          execute: function() {
-            //              <module statements>
-            //          }
-            //      }
-            //      <temp declarations>
-            //  }
-            //
-            // i.e:
-            //
-            //   import {x} from 'file1'
-            //   var y = 1;
-            //   export function foo() { return y + x(); }
-            //   console.log(y);
-            //
-            // Will be transformed to:
-            //
-            //  function(exports) {
-            //      function foo() { return y + file_1.x(); }
-            //      exports("foo", foo);
-            //      var file_1, y;
-            //      return {
-            //          setters: [
-            //              function(v) { file_1 = v }
-            //          ],
-            //          execute(): function() {
-            //              y = 1;
-            //              console.log(y);
-            //          }
-            //      };
-            //  }
             var statements = [];
-            // We start a new lexical environment in this function body, but *not* in the
-            // body of the execute function. This allows us to emit temporary declarations
-            // only in the outer module body and not in the inner one.
             startLexicalEnvironment();
-            // Add any prologue directives.
             var ensureUseStrict = ts.getStrictOptionValue(compilerOptions, "alwaysStrict") || (!compilerOptions.noImplicitUseStrict && ts.isExternalModule(currentSourceFile));
             var statementOffset = ts.addPrologue(statements, node.statements, ensureUseStrict, sourceElementVisitor);
-            // var __moduleName = context_1 && context_1.id;
-            statements.push(ts.createVariableStatement(
-            /*modifiers*/ undefined, ts.createVariableDeclarationList([
-                ts.createVariableDeclaration("__moduleName", 
-                /*type*/ undefined, ts.createLogicalAnd(contextObject, ts.createPropertyAccess(contextObject, "id")))
+            statements.push(ts.createVariableStatement(undefined, ts.createVariableDeclarationList([
+                ts.createVariableDeclaration("__moduleName", undefined, ts.createLogicalAnd(contextObject, ts.createPropertyAccess(contextObject, "id")))
             ])));
-            // Visit the synthetic external helpers import declaration if present
             ts.visitNode(moduleInfo.externalHelpersImportDeclaration, sourceElementVisitor, ts.isStatement);
-            // Visit the statements of the source file, emitting any transformations into
-            // the `executeStatements` array. We do this *before* we fill the `setters` array
-            // as we both emit transformations as well as aggregate some data used when creating
-            // setters. This allows us to reduce the number of times we need to loop through the
-            // statements of the source file.
             var executeStatements = ts.visitNodes(node.statements, sourceElementVisitor, ts.isStatement, statementOffset);
-            // Emit early exports for function declarations.
             ts.addRange(statements, hoistedStatements);
-            // We emit hoisted variables early to align roughly with our previous emit output.
-            // Two key differences in this approach are:
-            // - Temporary variables will appear at the top rather than at the bottom of the file
             ts.prependStatements(statements, endLexicalEnvironment());
-            var exportStarFunction = addExportStarIfNeeded(statements); // TODO: GH#18217
+            var exportStarFunction = addExportStarIfNeeded(statements);
             var moduleObject = ts.createObjectLiteral([
                 ts.createPropertyAssignment("setters", createSettersArray(exportStarFunction, dependencyGroups)),
-                ts.createPropertyAssignment("execute", ts.createFunctionExpression(
-                /*modifiers*/ undefined, 
-                /*asteriskToken*/ undefined, 
-                /*name*/ undefined, 
-                /*typeParameters*/ undefined, 
-                /*parameters*/ [], 
-                /*type*/ undefined, ts.createBlock(executeStatements, /*multiLine*/ true)))
+                ts.createPropertyAssignment("execute", ts.createFunctionExpression(undefined, undefined, undefined, undefined, [], undefined, ts.createBlock(executeStatements, true)))
             ]);
             moduleObject.multiLine = true;
             statements.push(ts.createReturn(moduleObject));
-            return ts.createBlock(statements, /*multiLine*/ true);
+            return ts.createBlock(statements, true);
         }
-        /**
-         * Adds an exportStar function to a statement list if it is needed for the file.
-         *
-         * @param statements A statement list.
-         */
         function addExportStarIfNeeded(statements) {
             if (!moduleInfo.hasExportStarsToExportValues) {
                 return;
             }
-            // when resolving exports local exported entries/indirect exported entries in the module
-            // should always win over entries with similar names that were added via star exports
-            // to support this we store names of local/indirect exported entries in a set.
-            // this set is used to filter names brought by star expors.
-            // local names set should only be added if we have anything exported
             if (!moduleInfo.exportedNames && moduleInfo.exportSpecifiers.size === 0) {
-                // no exported declarations (export var ...) or export specifiers (export {x})
-                // check if we have any non star export declarations.
                 var hasExportDeclarationWithExportClause = false;
                 for (var _i = 0, _a = moduleInfo.externalImports; _i < _a.length; _i++) {
                     var externalImport = _a[_i];
-                    if (externalImport.kind === 250 /* ExportDeclaration */ && externalImport.exportClause) {
+                    if (externalImport.kind === 250 && externalImport.exportClause) {
                         hasExportDeclarationWithExportClause = true;
                         break;
                     }
                 }
                 if (!hasExportDeclarationWithExportClause) {
-                    // we still need to emit exportStar helper
-                    var exportStarFunction_1 = createExportStarFunction(/*localNames*/ undefined);
+                    var exportStarFunction_1 = createExportStarFunction(undefined);
                     statements.push(exportStarFunction_1);
                     return exportStarFunction_1.name;
                 }
@@ -73090,42 +58819,30 @@ var ts;
                     if (exportedLocalName.escapedText === "default") {
                         continue;
                     }
-                    // write name of exported declaration, i.e 'export var x...'
                     exportedNames.push(ts.createPropertyAssignment(ts.createLiteral(exportedLocalName), ts.createTrue()));
                 }
             }
             for (var _d = 0, _e = moduleInfo.externalImports; _d < _e.length; _d++) {
                 var externalImport = _e[_d];
-                if (externalImport.kind !== 250 /* ExportDeclaration */) {
+                if (externalImport.kind !== 250) {
                     continue;
                 }
                 if (!externalImport.exportClause) {
-                    // export * from ...
                     continue;
                 }
                 for (var _f = 0, _g = externalImport.exportClause.elements; _f < _g.length; _f++) {
                     var element = _g[_f];
-                    // write name of indirectly exported entry, i.e. 'export {x} from ...'
                     exportedNames.push(ts.createPropertyAssignment(ts.createLiteral(ts.idText(element.name || element.propertyName)), ts.createTrue()));
                 }
             }
             var exportedNamesStorageRef = ts.createUniqueName("exportedNames");
-            statements.push(ts.createVariableStatement(
-            /*modifiers*/ undefined, ts.createVariableDeclarationList([
-                ts.createVariableDeclaration(exportedNamesStorageRef, 
-                /*type*/ undefined, ts.createObjectLiteral(exportedNames, /*multiline*/ true))
+            statements.push(ts.createVariableStatement(undefined, ts.createVariableDeclarationList([
+                ts.createVariableDeclaration(exportedNamesStorageRef, undefined, ts.createObjectLiteral(exportedNames, true))
             ])));
             var exportStarFunction = createExportStarFunction(exportedNamesStorageRef);
             statements.push(exportStarFunction);
             return exportStarFunction.name;
         }
-        /**
-         * Creates an exportStar function for the file, with an optional set of excluded local
-         * names.
-         *
-         * @param localNames An optional reference to an object containing a set of excluded local
-         * names.
-         */
         function createExportStarFunction(localNames) {
             var exportStarFunction = ts.createUniqueName("exportStar");
             var m = ts.createIdentifier("m");
@@ -73133,135 +58850,79 @@ var ts;
             var exports = ts.createIdentifier("exports");
             var condition = ts.createStrictInequality(n, ts.createLiteral("default"));
             if (localNames) {
-                condition = ts.createLogicalAnd(condition, ts.createLogicalNot(ts.createCall(ts.createPropertyAccess(localNames, "hasOwnProperty"), 
-                /*typeArguments*/ undefined, [n])));
-            }
-            return ts.createFunctionDeclaration(
-            /*decorators*/ undefined, 
-            /*modifiers*/ undefined, 
-            /*asteriskToken*/ undefined, exportStarFunction, 
-            /*typeParameters*/ undefined, [ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, m)], 
-            /*type*/ undefined, ts.createBlock([
-                ts.createVariableStatement(
-                /*modifiers*/ undefined, ts.createVariableDeclarationList([
-                    ts.createVariableDeclaration(exports, 
-                    /*type*/ undefined, ts.createObjectLiteral([]))
+                condition = ts.createLogicalAnd(condition, ts.createLogicalNot(ts.createCall(ts.createPropertyAccess(localNames, "hasOwnProperty"), undefined, [n])));
+            }
+            return ts.createFunctionDeclaration(undefined, undefined, undefined, exportStarFunction, undefined, [ts.createParameter(undefined, undefined, undefined, m)], undefined, ts.createBlock([
+                ts.createVariableStatement(undefined, ts.createVariableDeclarationList([
+                    ts.createVariableDeclaration(exports, undefined, ts.createObjectLiteral([]))
                 ])),
                 ts.createForIn(ts.createVariableDeclarationList([
-                    ts.createVariableDeclaration(n, /*type*/ undefined)
+                    ts.createVariableDeclaration(n, undefined)
                 ]), m, ts.createBlock([
-                    ts.setEmitFlags(ts.createIf(condition, ts.createStatement(ts.createAssignment(ts.createElementAccess(exports, n), ts.createElementAccess(m, n)))), 1 /* SingleLine */)
+                    ts.setEmitFlags(ts.createIf(condition, ts.createStatement(ts.createAssignment(ts.createElementAccess(exports, n), ts.createElementAccess(m, n)))), 1)
                 ])),
-                ts.createStatement(ts.createCall(exportFunction, 
-                /*typeArguments*/ undefined, [exports]))
-            ], /*multiline*/ true));
-        }
-        /**
-         * Creates an array setter callbacks for each dependency group.
-         *
-         * @param exportStarFunction A reference to an exportStarFunction for the file.
-         * @param dependencyGroups An array of grouped dependencies.
-         */
+                ts.createStatement(ts.createCall(exportFunction, undefined, [exports]))
+            ], true));
+        }
         function createSettersArray(exportStarFunction, dependencyGroups) {
             var setters = [];
             for (var _i = 0, dependencyGroups_1 = dependencyGroups; _i < dependencyGroups_1.length; _i++) {
                 var group_1 = dependencyGroups_1[_i];
-                // derive a unique name for parameter from the first named entry in the group
                 var localName = ts.forEach(group_1.externalImports, function (i) { return ts.getLocalNameForExternalImport(i, currentSourceFile); });
                 var parameterName = localName ? ts.getGeneratedNameForNode(localName) : ts.createUniqueName("");
                 var statements = [];
                 for (var _a = 0, _b = group_1.externalImports; _a < _b.length; _a++) {
                     var entry = _b[_a];
-                    var importVariableName = ts.getLocalNameForExternalImport(entry, currentSourceFile); // TODO: GH#18217
+                    var importVariableName = ts.getLocalNameForExternalImport(entry, currentSourceFile);
                     switch (entry.kind) {
-                        case 244 /* ImportDeclaration */:
+                        case 244:
                             if (!entry.importClause) {
-                                // 'import "..."' case
-                                // module is imported only for side-effects, no emit required
                                 break;
                             }
-                        // falls through
-                        case 243 /* ImportEqualsDeclaration */:
+                        case 243:
                             ts.Debug.assert(importVariableName !== undefined);
-                            // save import into the local
                             statements.push(ts.createStatement(ts.createAssignment(importVariableName, parameterName)));
                             break;
-                        case 250 /* ExportDeclaration */:
+                        case 250:
                             ts.Debug.assert(importVariableName !== undefined);
                             if (entry.exportClause) {
-                                //  export {a, b as c} from 'foo'
-                                //
-                                // emit as:
-                                //
-                                //  exports_({
-                                //     "a": _["a"],
-                                //     "c": _["b"]
-                                //  });
                                 var properties = [];
                                 for (var _c = 0, _d = entry.exportClause.elements; _c < _d.length; _c++) {
                                     var e = _d[_c];
                                     properties.push(ts.createPropertyAssignment(ts.createLiteral(ts.idText(e.name)), ts.createElementAccess(parameterName, ts.createLiteral(ts.idText(e.propertyName || e.name)))));
                                 }
-                                statements.push(ts.createStatement(ts.createCall(exportFunction, 
-                                /*typeArguments*/ undefined, [ts.createObjectLiteral(properties, /*multiline*/ true)])));
+                                statements.push(ts.createStatement(ts.createCall(exportFunction, undefined, [ts.createObjectLiteral(properties, true)])));
                             }
                             else {
-                                //  export * from 'foo'
-                                //
-                                // emit as:
-                                //
-                                //  exportStar(foo_1_1);
-                                statements.push(ts.createStatement(ts.createCall(exportStarFunction, 
-                                /*typeArguments*/ undefined, [parameterName])));
+                                statements.push(ts.createStatement(ts.createCall(exportStarFunction, undefined, [parameterName])));
                             }
                             break;
                     }
                 }
-                setters.push(ts.createFunctionExpression(
-                /*modifiers*/ undefined, 
-                /*asteriskToken*/ undefined, 
-                /*name*/ undefined, 
-                /*typeParameters*/ undefined, [ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, parameterName)], 
-                /*type*/ undefined, ts.createBlock(statements, /*multiLine*/ true)));
+                setters.push(ts.createFunctionExpression(undefined, undefined, undefined, undefined, [ts.createParameter(undefined, undefined, undefined, parameterName)], undefined, ts.createBlock(statements, true)));
             }
-            return ts.createArrayLiteral(setters, /*multiLine*/ true);
+            return ts.createArrayLiteral(setters, true);
         }
-        //
-        // Top-level Source Element Visitors
-        //
-        /**
-         * Visit source elements at the top-level of a module.
-         *
-         * @param node The node to visit.
-         */
         function sourceElementVisitor(node) {
             switch (node.kind) {
-                case 244 /* ImportDeclaration */:
+                case 244:
                     return visitImportDeclaration(node);
-                case 243 /* ImportEqualsDeclaration */:
+                case 243:
                     return visitImportEqualsDeclaration(node);
-                case 250 /* ExportDeclaration */:
-                    // ExportDeclarations are elided as they are handled via
-                    // `appendExportsOfDeclaration`.
+                case 250:
                     return undefined;
-                case 249 /* ExportAssignment */:
+                case 249:
                     return visitExportAssignment(node);
                 default:
                     return nestedElementVisitor(node);
             }
         }
-        /**
-         * Visits an ImportDeclaration node.
-         *
-         * @param node The node to visit.
-         */
         function visitImportDeclaration(node) {
             var statements;
             if (node.importClause) {
-                hoistVariableDeclaration(ts.getLocalNameForExternalImport(node, currentSourceFile)); // TODO: GH#18217
+                hoistVariableDeclaration(ts.getLocalNameForExternalImport(node, currentSourceFile));
             }
             if (hasAssociatedEndOfDeclarationMarker(node)) {
-                // Defer exports until we encounter an EndOfDeclarationMarker node
                 var id = ts.getOriginalNodeId(node);
                 deferredExports[id] = appendExportsOfImportDeclaration(deferredExports[id], node);
             }
@@ -73270,17 +58931,11 @@ var ts;
             }
             return ts.singleOrMany(statements);
         }
-        /**
-         * Visits an ImportEqualsDeclaration node.
-         *
-         * @param node The node to visit.
-         */
         function visitImportEqualsDeclaration(node) {
             ts.Debug.assert(ts.isExternalModuleImportEqualsDeclaration(node), "import= for internal module references should be handled in an earlier transformer.");
             var statements;
-            hoistVariableDeclaration(ts.getLocalNameForExternalImport(node, currentSourceFile)); // TODO: GH#18217
+            hoistVariableDeclaration(ts.getLocalNameForExternalImport(node, currentSourceFile));
             if (hasAssociatedEndOfDeclarationMarker(node)) {
-                // Defer exports until we encounter an EndOfDeclarationMarker node
                 var id = ts.getOriginalNodeId(node);
                 deferredExports[id] = appendExportsOfImportEqualsDeclaration(deferredExports[id], node);
             }
@@ -73289,43 +58944,28 @@ var ts;
             }
             return ts.singleOrMany(statements);
         }
-        /**
-         * Visits an ExportAssignment node.
-         *
-         * @param node The node to visit.
-         */
         function visitExportAssignment(node) {
             if (node.isExportEquals) {
-                // Elide `export=` as it is illegal in a SystemJS module.
                 return undefined;
             }
             var expression = ts.visitNode(node.expression, destructuringAndImportCallVisitor, ts.isExpression);
             var original = node.original;
             if (original && hasAssociatedEndOfDeclarationMarker(original)) {
-                // Defer exports until we encounter an EndOfDeclarationMarker node
                 var id = ts.getOriginalNodeId(node);
-                deferredExports[id] = appendExportStatement(deferredExports[id], ts.createIdentifier("default"), expression, /*allowComments*/ true);
+                deferredExports[id] = appendExportStatement(deferredExports[id], ts.createIdentifier("default"), expression, true);
             }
             else {
-                return createExportStatement(ts.createIdentifier("default"), expression, /*allowComments*/ true);
+                return createExportStatement(ts.createIdentifier("default"), expression, true);
             }
         }
-        /**
-         * Visits a FunctionDeclaration, hoisting it to the outer module body function.
-         *
-         * @param node The node to visit.
-         */
         function visitFunctionDeclaration(node) {
-            if (ts.hasModifier(node, 1 /* Export */)) {
-                hoistedStatements = ts.append(hoistedStatements, ts.updateFunctionDeclaration(node, node.decorators, ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), node.asteriskToken, ts.getDeclarationName(node, /*allowComments*/ true, /*allowSourceMaps*/ true), 
-                /*typeParameters*/ undefined, ts.visitNodes(node.parameters, destructuringAndImportCallVisitor, ts.isParameterDeclaration), 
-                /*type*/ undefined, ts.visitNode(node.body, destructuringAndImportCallVisitor, ts.isBlock)));
+            if (ts.hasModifier(node, 1)) {
+                hoistedStatements = ts.append(hoistedStatements, ts.updateFunctionDeclaration(node, node.decorators, ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), node.asteriskToken, ts.getDeclarationName(node, true, true), undefined, ts.visitNodes(node.parameters, destructuringAndImportCallVisitor, ts.isParameterDeclaration), undefined, ts.visitNode(node.body, destructuringAndImportCallVisitor, ts.isBlock)));
             }
             else {
                 hoistedStatements = ts.append(hoistedStatements, ts.visitEachChild(node, destructuringAndImportCallVisitor, context));
             }
             if (hasAssociatedEndOfDeclarationMarker(node)) {
-                // Defer exports until we encounter an EndOfDeclarationMarker node
                 var id = ts.getOriginalNodeId(node);
                 deferredExports[id] = appendExportsOfHoistedDeclaration(deferredExports[id], node);
             }
@@ -73334,22 +58974,12 @@ var ts;
             }
             return undefined;
         }
-        /**
-         * Visits a ClassDeclaration, hoisting its name to the outer module body function.
-         *
-         * @param node The node to visit.
-         */
         function visitClassDeclaration(node) {
             var statements;
-            // Hoist the name of the class declaration to the outer module body function.
             var name = ts.getLocalName(node);
             hoistVariableDeclaration(name);
-            // Rewrite the class declaration into an assignment of a class expression.
-            statements = ts.append(statements, ts.setTextRange(ts.createStatement(ts.createAssignment(name, ts.setTextRange(ts.createClassExpression(
-            /*modifiers*/ undefined, node.name, 
-            /*typeParameters*/ undefined, ts.visitNodes(node.heritageClauses, destructuringAndImportCallVisitor, ts.isHeritageClause), ts.visitNodes(node.members, destructuringAndImportCallVisitor, ts.isClassElement)), node))), node));
+            statements = ts.append(statements, ts.setTextRange(ts.createStatement(ts.createAssignment(name, ts.setTextRange(ts.createClassExpression(undefined, node.name, undefined, ts.visitNodes(node.heritageClauses, destructuringAndImportCallVisitor, ts.isHeritageClause), ts.visitNodes(node.members, destructuringAndImportCallVisitor, ts.isClassElement)), node))), node));
             if (hasAssociatedEndOfDeclarationMarker(node)) {
-                // Defer exports until we encounter an EndOfDeclarationMarker node
                 var id = ts.getOriginalNodeId(node);
                 deferredExports[id] = appendExportsOfHoistedDeclaration(deferredExports[id], node);
             }
@@ -73358,18 +58988,12 @@ var ts;
             }
             return ts.singleOrMany(statements);
         }
-        /**
-         * Visits a variable statement, hoisting declared names to the top-level module body.
-         * Each declaration is rewritten into an assignment expression.
-         *
-         * @param node The node to visit.
-         */
         function visitVariableStatement(node) {
             if (!shouldHoistVariableDeclarationList(node.declarationList)) {
                 return ts.visitNode(node, destructuringAndImportCallVisitor, ts.isStatement);
             }
             var expressions;
-            var isExportedDeclaration = ts.hasModifier(node, 1 /* Export */);
+            var isExportedDeclaration = ts.hasModifier(node, 1);
             var isMarkedDeclaration = hasAssociatedEndOfDeclarationMarker(node);
             for (var _i = 0, _a = node.declarationList.declarations; _i < _a.length; _i++) {
                 var variable = _a[_i];
@@ -73385,20 +59009,14 @@ var ts;
                 statements = ts.append(statements, ts.setTextRange(ts.createStatement(ts.inlineExpressions(expressions)), node));
             }
             if (isMarkedDeclaration) {
-                // Defer exports until we encounter an EndOfDeclarationMarker node
                 var id = ts.getOriginalNodeId(node);
                 deferredExports[id] = appendExportsOfVariableStatement(deferredExports[id], node, isExportedDeclaration);
             }
             else {
-                statements = appendExportsOfVariableStatement(statements, node, /*exportSelf*/ false);
+                statements = appendExportsOfVariableStatement(statements, node, false);
             }
             return ts.singleOrMany(statements);
         }
-        /**
-         * Hoists the declared names of a VariableDeclaration or BindingElement.
-         *
-         * @param node The declaration to hoist.
-         */
         function hoistBindingElement(node) {
             if (ts.isBindingPattern(node.name)) {
                 for (var _i = 0, _a = node.name.elements; _i < _a.length; _i++) {
@@ -73412,103 +59030,41 @@ var ts;
                 hoistVariableDeclaration(ts.getSynthesizedClone(node.name));
             }
         }
-        /**
-         * Determines whether a VariableDeclarationList should be hoisted.
-         *
-         * @param node The node to test.
-         */
         function shouldHoistVariableDeclarationList(node) {
-            // hoist only non-block scoped declarations or block scoped declarations parented by source file
-            return (ts.getEmitFlags(node) & 2097152 /* NoHoisting */) === 0
-                && (enclosingBlockScopedContainer.kind === 274 /* SourceFile */
-                    || (ts.getOriginalNode(node).flags & 3 /* BlockScoped */) === 0);
-        }
-        /**
-         * Transform an initialized variable declaration into an expression.
-         *
-         * @param node The node to transform.
-         * @param isExportedDeclaration A value indicating whether the variable is exported.
-         */
+            return (ts.getEmitFlags(node) & 2097152) === 0
+                && (enclosingBlockScopedContainer.kind === 274
+                    || (ts.getOriginalNode(node).flags & 3) === 0);
+        }
         function transformInitializedVariable(node, isExportedDeclaration) {
             var createAssignment = isExportedDeclaration ? createExportedVariableAssignment : createNonExportedVariableAssignment;
             return ts.isBindingPattern(node.name)
-                ? ts.flattenDestructuringAssignment(node, destructuringAndImportCallVisitor, context, 0 /* All */, 
-                /*needsValue*/ false, createAssignment)
+                ? ts.flattenDestructuringAssignment(node, destructuringAndImportCallVisitor, context, 0, false, createAssignment)
                 : node.initializer ? createAssignment(node.name, ts.visitNode(node.initializer, destructuringAndImportCallVisitor, ts.isExpression)) : node.name;
         }
-        /**
-         * Creates an assignment expression for an exported variable declaration.
-         *
-         * @param name The name of the variable.
-         * @param value The value of the variable's initializer.
-         * @param location The source map location for the assignment.
-         */
         function createExportedVariableAssignment(name, value, location) {
-            return createVariableAssignment(name, value, location, /*isExportedDeclaration*/ true);
-        }
-        /**
-         * Creates an assignment expression for a non-exported variable declaration.
-         *
-         * @param name The name of the variable.
-         * @param value The value of the variable's initializer.
-         * @param location The source map location for the assignment.
-         */
+            return createVariableAssignment(name, value, location, true);
+        }
         function createNonExportedVariableAssignment(name, value, location) {
-            return createVariableAssignment(name, value, location, /*isExportedDeclaration*/ false);
-        }
-        /**
-         * Creates an assignment expression for a variable declaration.
-         *
-         * @param name The name of the variable.
-         * @param value The value of the variable's initializer.
-         * @param location The source map location for the assignment.
-         * @param isExportedDeclaration A value indicating whether the variable is exported.
-         */
+            return createVariableAssignment(name, value, location, false);
+        }
         function createVariableAssignment(name, value, location, isExportedDeclaration) {
             hoistVariableDeclaration(ts.getSynthesizedClone(name));
             return isExportedDeclaration
                 ? createExportExpression(name, preventSubstitution(ts.setTextRange(ts.createAssignment(name, value), location)))
                 : preventSubstitution(ts.setTextRange(ts.createAssignment(name, value), location));
         }
-        /**
-         * Visits a MergeDeclarationMarker used as a placeholder for the beginning of a merged
-         * and transformed declaration.
-         *
-         * @param node The node to visit.
-         */
         function visitMergeDeclarationMarker(node) {
-            // For an EnumDeclaration or ModuleDeclaration that merges with a preceeding
-            // declaration we do not emit a leading variable declaration. To preserve the
-            // begin/end semantics of the declararation and to properly handle exports
-            // we wrapped the leading variable declaration in a `MergeDeclarationMarker`.
-            //
-            // To balance the declaration, we defer the exports of the elided variable
-            // statement until we visit this declaration's `EndOfDeclarationMarker`.
-            if (hasAssociatedEndOfDeclarationMarker(node) && node.original.kind === 214 /* VariableStatement */) {
+            if (hasAssociatedEndOfDeclarationMarker(node) && node.original.kind === 214) {
                 var id = ts.getOriginalNodeId(node);
-                var isExportedDeclaration = ts.hasModifier(node.original, 1 /* Export */);
+                var isExportedDeclaration = ts.hasModifier(node.original, 1);
                 deferredExports[id] = appendExportsOfVariableStatement(deferredExports[id], node.original, isExportedDeclaration);
             }
             return node;
         }
-        /**
-         * Determines whether a node has an associated EndOfDeclarationMarker.
-         *
-         * @param node The node to test.
-         */
         function hasAssociatedEndOfDeclarationMarker(node) {
-            return (ts.getEmitFlags(node) & 4194304 /* HasEndOfDeclarationMarker */) !== 0;
-        }
-        /**
-         * Visits a DeclarationMarker used as a placeholder for the end of a transformed
-         * declaration.
-         *
-         * @param node The node to visit.
-         */
+            return (ts.getEmitFlags(node) & 4194304) !== 0;
+        }
         function visitEndOfDeclarationMarker(node) {
-            // For some transformations we emit an `EndOfDeclarationMarker` to mark the actual
-            // end of the transformed declaration. We use this marker to emit any deferred exports
-            // of the declaration.
             var id = ts.getOriginalNodeId(node);
             var statements = deferredExports[id];
             if (statements) {
@@ -73523,15 +59079,6 @@ var ts;
             }
             return node;
         }
-        /**
-         * Appends the exports of an ImportDeclaration to a statement list, returning the
-         * statement list.
-         *
-         * @param statements A statement list to which the down-level export statements are to be
-         * appended. If `statements` is `undefined`, a new array is allocated if statements are
-         * appended.
-         * @param decl The declaration whose exports are to be recorded.
-         */
         function appendExportsOfImportDeclaration(statements, decl) {
             if (moduleInfo.exportEquals) {
                 return statements;
@@ -73546,10 +59093,10 @@ var ts;
             var namedBindings = importClause.namedBindings;
             if (namedBindings) {
                 switch (namedBindings.kind) {
-                    case 246 /* NamespaceImport */:
+                    case 246:
                         statements = appendExportsOfDeclaration(statements, namedBindings);
                         break;
-                    case 247 /* NamedImports */:
+                    case 247:
                         for (var _i = 0, _a = namedBindings.elements; _i < _a.length; _i++) {
                             var importBinding = _a[_i];
                             statements = appendExportsOfDeclaration(statements, importBinding);
@@ -73559,32 +59106,12 @@ var ts;
             }
             return statements;
         }
-        /**
-         * Appends the export of an ImportEqualsDeclaration to a statement list, returning the
-         * statement list.
-         *
-         * @param statements A statement list to which the down-level export statements are to be
-         * appended. If `statements` is `undefined`, a new array is allocated if statements are
-         * appended.
-         * @param decl The declaration whose exports are to be recorded.
-         */
         function appendExportsOfImportEqualsDeclaration(statements, decl) {
             if (moduleInfo.exportEquals) {
                 return statements;
             }
             return appendExportsOfDeclaration(statements, decl);
         }
-        /**
-         * Appends the exports of a VariableStatement to a statement list, returning the statement
-         * list.
-         *
-         * @param statements A statement list to which the down-level export statements are to be
-         * appended. If `statements` is `undefined`, a new array is allocated if statements are
-         * appended.
-         * @param node The VariableStatement whose exports are to be recorded.
-         * @param exportSelf A value indicating whether to also export each VariableDeclaration of
-         * `nodes` declaration list.
-         */
         function appendExportsOfVariableStatement(statements, node, exportSelf) {
             if (moduleInfo.exportEquals) {
                 return statements;
@@ -73597,16 +59124,6 @@ var ts;
             }
             return statements;
         }
-        /**
-         * Appends the exports of a VariableDeclaration or BindingElement to a statement list,
-         * returning the statement list.
-         *
-         * @param statements A statement list to which the down-level export statements are to be
-         * appended. If `statements` is `undefined`, a new array is allocated if statements are
-         * appended.
-         * @param decl The declaration whose exports are to be recorded.
-         * @param exportSelf A value indicating whether to also export the declaration itself.
-         */
         function appendExportsOfBindingElement(statements, decl, exportSelf) {
             if (moduleInfo.exportEquals) {
                 return statements;
@@ -73629,22 +59146,13 @@ var ts;
             }
             return statements;
         }
-        /**
-         * Appends the exports of a ClassDeclaration or FunctionDeclaration to a statement list,
-         * returning the statement list.
-         *
-         * @param statements A statement list to which the down-level export statements are to be
-         * appended. If `statements` is `undefined`, a new array is allocated if statements are
-         * appended.
-         * @param decl The declaration whose exports are to be recorded.
-         */
         function appendExportsOfHoistedDeclaration(statements, decl) {
             if (moduleInfo.exportEquals) {
                 return statements;
             }
             var excludeName;
-            if (ts.hasModifier(decl, 1 /* Export */)) {
-                var exportName = ts.hasModifier(decl, 512 /* Default */) ? ts.createLiteral("default") : decl.name;
+            if (ts.hasModifier(decl, 1)) {
+                var exportName = ts.hasModifier(decl, 512) ? ts.createLiteral("default") : decl.name;
                 statements = appendExportStatement(statements, exportName, ts.getLocalName(decl));
                 excludeName = ts.getTextOfIdentifierOrLiteral(exportName);
             }
@@ -73653,15 +59161,6 @@ var ts;
             }
             return statements;
         }
-        /**
-         * Appends the exports of a declaration to a statement list, returning the statement list.
-         *
-         * @param statements A statement list to which the down-level export statements are to be
-         * appended. If `statements` is `undefined`, a new array is allocated if statements are
-         * appended.
-         * @param decl The declaration to export.
-         * @param excludeName An optional name to exclude from exports.
-         */
         function appendExportsOfDeclaration(statements, decl, excludeName) {
             if (moduleInfo.exportEquals) {
                 return statements;
@@ -73678,104 +59177,67 @@ var ts;
             }
             return statements;
         }
-        /**
-         * Appends the down-level representation of an export to a statement list, returning the
-         * statement list.
-         *
-         * @param statements A statement list to which the down-level export statements are to be
-         * appended. If `statements` is `undefined`, a new array is allocated if statements are
-         * appended.
-         * @param exportName The name of the export.
-         * @param expression The expression to export.
-         * @param allowComments Whether to allow comments on the export.
-         */
         function appendExportStatement(statements, exportName, expression, allowComments) {
             statements = ts.append(statements, createExportStatement(exportName, expression, allowComments));
             return statements;
         }
-        /**
-         * Creates a call to the current file's export function to export a value.
-         *
-         * @param name The bound name of the export.
-         * @param value The exported value.
-         * @param allowComments An optional value indicating whether to emit comments for the statement.
-         */
         function createExportStatement(name, value, allowComments) {
             var statement = ts.createStatement(createExportExpression(name, value));
             ts.startOnNewLine(statement);
             if (!allowComments) {
-                ts.setEmitFlags(statement, 1536 /* NoComments */);
+                ts.setEmitFlags(statement, 1536);
             }
             return statement;
         }
-        /**
-         * Creates a call to the current file's export function to export a value.
-         *
-         * @param name The bound name of the export.
-         * @param value The exported value.
-         */
         function createExportExpression(name, value) {
             var exportName = ts.isIdentifier(name) ? ts.createLiteral(name) : name;
-            ts.setEmitFlags(value, ts.getEmitFlags(value) | 1536 /* NoComments */);
-            return ts.setCommentRange(ts.createCall(exportFunction, /*typeArguments*/ undefined, [exportName, value]), value);
-        }
-        //
-        // Top-Level or Nested Source Element Visitors
-        //
-        /**
-         * Visit nested elements at the top-level of a module.
-         *
-         * @param node The node to visit.
-         */
+            ts.setEmitFlags(value, ts.getEmitFlags(value) | 1536);
+            return ts.setCommentRange(ts.createCall(exportFunction, undefined, [exportName, value]), value);
+        }
         function nestedElementVisitor(node) {
             switch (node.kind) {
-                case 214 /* VariableStatement */:
+                case 214:
                     return visitVariableStatement(node);
-                case 234 /* FunctionDeclaration */:
+                case 234:
                     return visitFunctionDeclaration(node);
-                case 235 /* ClassDeclaration */:
+                case 235:
                     return visitClassDeclaration(node);
-                case 220 /* ForStatement */:
+                case 220:
                     return visitForStatement(node);
-                case 221 /* ForInStatement */:
+                case 221:
                     return visitForInStatement(node);
-                case 222 /* ForOfStatement */:
+                case 222:
                     return visitForOfStatement(node);
-                case 218 /* DoStatement */:
+                case 218:
                     return visitDoStatement(node);
-                case 219 /* WhileStatement */:
+                case 219:
                     return visitWhileStatement(node);
-                case 228 /* LabeledStatement */:
+                case 228:
                     return visitLabeledStatement(node);
-                case 226 /* WithStatement */:
+                case 226:
                     return visitWithStatement(node);
-                case 227 /* SwitchStatement */:
+                case 227:
                     return visitSwitchStatement(node);
-                case 241 /* CaseBlock */:
+                case 241:
                     return visitCaseBlock(node);
-                case 266 /* CaseClause */:
+                case 266:
                     return visitCaseClause(node);
-                case 267 /* DefaultClause */:
+                case 267:
                     return visitDefaultClause(node);
-                case 230 /* TryStatement */:
+                case 230:
                     return visitTryStatement(node);
-                case 269 /* CatchClause */:
+                case 269:
                     return visitCatchClause(node);
-                case 213 /* Block */:
+                case 213:
                     return visitBlock(node);
-                case 303 /* MergeDeclarationMarker */:
+                case 303:
                     return visitMergeDeclarationMarker(node);
-                case 304 /* EndOfDeclarationMarker */:
+                case 304:
                     return visitEndOfDeclarationMarker(node);
                 default:
                     return destructuringAndImportCallVisitor(node);
             }
         }
-        /**
-         * Visits the body of a ForStatement to hoist declarations.
-         *
-         * @param node The node to visit.
-         */
         function visitForStatement(node) {
             var savedEnclosingBlockScopedContainer = enclosingBlockScopedContainer;
             enclosingBlockScopedContainer = node;
@@ -73783,11 +59245,6 @@ var ts;
             enclosingBlockScopedContainer = savedEnclosingBlockScopedContainer;
             return node;
         }
-        /**
-         * Visits the body of a ForInStatement to hoist declarations.
-         *
-         * @param node The node to visit.
-         */
         function visitForInStatement(node) {
             var savedEnclosingBlockScopedContainer = enclosingBlockScopedContainer;
             enclosingBlockScopedContainer = node;
@@ -73795,11 +59252,6 @@ var ts;
             enclosingBlockScopedContainer = savedEnclosingBlockScopedContainer;
             return node;
         }
-        /**
-         * Visits the body of a ForOfStatement to hoist declarations.
-         *
-         * @param node The node to visit.
-         */
         function visitForOfStatement(node) {
             var savedEnclosingBlockScopedContainer = enclosingBlockScopedContainer;
             enclosingBlockScopedContainer = node;
@@ -73807,27 +59259,16 @@ var ts;
             enclosingBlockScopedContainer = savedEnclosingBlockScopedContainer;
             return node;
         }
-        /**
-         * Determines whether to hoist the initializer of a ForStatement, ForInStatement, or
-         * ForOfStatement.
-         *
-         * @param node The node to test.
-         */
         function shouldHoistForInitializer(node) {
             return ts.isVariableDeclarationList(node)
                 && shouldHoistVariableDeclarationList(node);
         }
-        /**
-         * Visits the initializer of a ForStatement, ForInStatement, or ForOfStatement
-         *
-         * @param node The node to visit.
-         */
         function visitForInitializer(node) {
             if (shouldHoistForInitializer(node)) {
                 var expressions = void 0;
                 for (var _i = 0, _a = node.declarations; _i < _a.length; _i++) {
                     var variable = _a[_i];
-                    expressions = ts.append(expressions, transformInitializedVariable(variable, /*isExportedDeclaration*/ false));
+                    expressions = ts.append(expressions, transformInitializedVariable(variable, false));
                     if (!variable.initializer) {
                         hoistBindingElement(variable);
                     }
@@ -73838,51 +59279,21 @@ var ts;
                 return ts.visitEachChild(node, nestedElementVisitor, context);
             }
         }
-        /**
-         * Visits the body of a DoStatement to hoist declarations.
-         *
-         * @param node The node to visit.
-         */
         function visitDoStatement(node) {
             return ts.updateDo(node, ts.visitNode(node.statement, nestedElementVisitor, ts.isStatement, ts.liftToBlock), ts.visitNode(node.expression, destructuringAndImportCallVisitor, ts.isExpression));
         }
-        /**
-         * Visits the body of a WhileStatement to hoist declarations.
-         *
-         * @param node The node to visit.
-         */
         function visitWhileStatement(node) {
             return ts.updateWhile(node, ts.visitNode(node.expression, destructuringAndImportCallVisitor, ts.isExpression), ts.visitNode(node.statement, nestedElementVisitor, ts.isStatement, ts.liftToBlock));
         }
-        /**
-         * Visits the body of a LabeledStatement to hoist declarations.
-         *
-         * @param node The node to visit.
-         */
         function visitLabeledStatement(node) {
             return ts.updateLabel(node, node.label, ts.visitNode(node.statement, nestedElementVisitor, ts.isStatement, ts.liftToBlock));
         }
-        /**
-         * Visits the body of a WithStatement to hoist declarations.
-         *
-         * @param node The node to visit.
-         */
         function visitWithStatement(node) {
             return ts.updateWith(node, ts.visitNode(node.expression, destructuringAndImportCallVisitor, ts.isExpression), ts.visitNode(node.statement, nestedElementVisitor, ts.isStatement, ts.liftToBlock));
         }
-        /**
-         * Visits the body of a SwitchStatement to hoist declarations.
-         *
-         * @param node The node to visit.
-         */
         function visitSwitchStatement(node) {
             return ts.updateSwitch(node, ts.visitNode(node.expression, destructuringAndImportCallVisitor, ts.isExpression), ts.visitNode(node.caseBlock, nestedElementVisitor, ts.isCaseBlock));
         }
-        /**
-         * Visits the body of a CaseBlock to hoist declarations.
-         *
-         * @param node The node to visit.
-         */
         function visitCaseBlock(node) {
             var savedEnclosingBlockScopedContainer = enclosingBlockScopedContainer;
             enclosingBlockScopedContainer = node;
@@ -73890,35 +59301,15 @@ var ts;
             enclosingBlockScopedContainer = savedEnclosingBlockScopedContainer;
             return node;
         }
-        /**
-         * Visits the body of a CaseClause to hoist declarations.
-         *
-         * @param node The node to visit.
-         */
         function visitCaseClause(node) {
             return ts.updateCaseClause(node, ts.visitNode(node.expression, destructuringAndImportCallVisitor, ts.isExpression), ts.visitNodes(node.statements, nestedElementVisitor, ts.isStatement));
         }
-        /**
-         * Visits the body of a DefaultClause to hoist declarations.
-         *
-         * @param node The node to visit.
-         */
         function visitDefaultClause(node) {
             return ts.visitEachChild(node, nestedElementVisitor, context);
         }
-        /**
-         * Visits the body of a TryStatement to hoist declarations.
-         *
-         * @param node The node to visit.
-         */
         function visitTryStatement(node) {
             return ts.visitEachChild(node, nestedElementVisitor, context);
         }
-        /**
-         * Visits the body of a CatchClause to hoist declarations.
-         *
-         * @param node The node to visit.
-         */
         function visitCatchClause(node) {
             var savedEnclosingBlockScopedContainer = enclosingBlockScopedContainer;
             enclosingBlockScopedContainer = node;
@@ -73926,11 +59317,6 @@ var ts;
             enclosingBlockScopedContainer = savedEnclosingBlockScopedContainer;
             return node;
         }
-        /**
-         * Visits the body of a Block to hoist declarations.
-         *
-         * @param node The node to visit.
-         */
         function visitBlock(node) {
             var savedEnclosingBlockScopedContainer = enclosingBlockScopedContainer;
             enclosingBlockScopedContainer = node;
@@ -73938,23 +59324,15 @@ var ts;
             enclosingBlockScopedContainer = savedEnclosingBlockScopedContainer;
             return node;
         }
-        //
-        // Destructuring Assignment Visitors
-        //
-        /**
-         * Visit nodes to flatten destructuring assignments to exported symbols.
-         *
-         * @param node The node to visit.
-         */
         function destructuringAndImportCallVisitor(node) {
-            if (node.transformFlags & 1024 /* DestructuringAssignment */
-                && node.kind === 200 /* BinaryExpression */) {
+            if (node.transformFlags & 1024
+                && node.kind === 200) {
                 return visitDestructuringAssignment(node);
             }
             else if (ts.isImportCall(node)) {
                 return visitImportCallExpression(node);
             }
-            else if ((node.transformFlags & 2048 /* ContainsDestructuringAssignment */) || (node.transformFlags & 67108864 /* ContainsDynamicImport */)) {
+            else if ((node.transformFlags & 2048) || (node.transformFlags & 67108864)) {
                 return ts.visitEachChild(node, destructuringAndImportCallVisitor, context);
             }
             else {
@@ -73962,38 +59340,16 @@ var ts;
             }
         }
         function visitImportCallExpression(node) {
-            // import("./blah")
-            // emit as
-            // System.register([], function (_export, _context) {
-            //     return {
-            //         setters: [],
-            //         execute: () => {
-            //             _context.import('./blah');
-            //         }
-            //     };
-            // });
-            return ts.createCall(ts.createPropertyAccess(contextObject, ts.createIdentifier("import")), 
-            /*typeArguments*/ undefined, ts.some(node.arguments) ? [ts.visitNode(node.arguments[0], destructuringAndImportCallVisitor)] : []);
-        }
-        /**
-         * Visits a DestructuringAssignment to flatten destructuring to exported symbols.
-         *
-         * @param node The node to visit.
-         */
+            return ts.createCall(ts.createPropertyAccess(contextObject, ts.createIdentifier("import")), undefined, ts.some(node.arguments) ? [ts.visitNode(node.arguments[0], destructuringAndImportCallVisitor)] : []);
+        }
         function visitDestructuringAssignment(node) {
             if (hasExportedReferenceInDestructuringTarget(node.left)) {
-                return ts.flattenDestructuringAssignment(node, destructuringAndImportCallVisitor, context, 0 /* All */, 
-                /*needsValue*/ true);
+                return ts.flattenDestructuringAssignment(node, destructuringAndImportCallVisitor, context, 0, true);
             }
             return ts.visitEachChild(node, destructuringAndImportCallVisitor, context);
         }
-        /**
-         * Determines whether the target of a destructuring assigment refers to an exported symbol.
-         *
-         * @param node The destructuring target.
-         */
         function hasExportedReferenceInDestructuringTarget(node) {
-            if (ts.isAssignmentExpression(node, /*excludeCompoundAssignment*/ true)) {
+            if (ts.isAssignmentExpression(node, true)) {
                 return hasExportedReferenceInDestructuringTarget(node.left);
             }
             else if (ts.isSpreadElement(node)) {
@@ -74013,40 +59369,22 @@ var ts;
             }
             else if (ts.isIdentifier(node)) {
                 var container = resolver.getReferencedExportContainer(node);
-                return container !== undefined && container.kind === 274 /* SourceFile */;
+                return container !== undefined && container.kind === 274;
             }
             else {
                 return false;
             }
         }
-        //
-        // Modifier Visitors
-        //
-        /**
-         * Visit nodes to elide module-specific modifiers.
-         *
-         * @param node The node to visit.
-         */
         function modifierVisitor(node) {
             switch (node.kind) {
-                case 84 /* ExportKeyword */:
-                case 79 /* DefaultKeyword */:
+                case 84:
+                case 79:
                     return undefined;
             }
             return node;
         }
-        //
-        // Emit Notification
-        //
-        /**
-         * Hook for node emit notifications.
-         *
-         * @param hint A hint as to the intended usage of the node.
-         * @param node The node to emit.
-         * @param emitCallback A callback used to emit the node in the printer.
-         */
         function onEmitNode(hint, node, emitCallback) {
-            if (node.kind === 274 /* SourceFile */) {
+            if (node.kind === 274) {
                 var id = ts.getOriginalNodeId(node);
                 currentSourceFile = node;
                 moduleInfo = moduleInfoMap[id];
@@ -74065,127 +59403,75 @@ var ts;
                 previousOnEmitNode(hint, node, emitCallback);
             }
         }
-        //
-        // Substitutions
-        //
-        /**
-         * Hooks node substitutions.
-         *
-         * @param hint A hint as to the intended usage of the node.
-         * @param node The node to substitute.
-         */
         function onSubstituteNode(hint, node) {
             node = previousOnSubstituteNode(hint, node);
             if (isSubstitutionPrevented(node)) {
                 return node;
             }
-            if (hint === 1 /* Expression */) {
+            if (hint === 1) {
                 return substituteExpression(node);
             }
-            else if (hint === 4 /* Unspecified */) {
+            else if (hint === 4) {
                 return substituteUnspecified(node);
             }
             return node;
         }
-        /**
-         * Substitute the node, if necessary.
-         *
-         * @param node The node to substitute.
-         */
         function substituteUnspecified(node) {
             switch (node.kind) {
-                case 271 /* ShorthandPropertyAssignment */:
+                case 271:
                     return substituteShorthandPropertyAssignment(node);
             }
             return node;
         }
-        /**
-         * Substitution for a ShorthandPropertyAssignment whose name that may contain an imported or exported symbol.
-         *
-         * @param node The node to substitute.
-         */
         function substituteShorthandPropertyAssignment(node) {
             var name = node.name;
             if (!ts.isGeneratedIdentifier(name) && !ts.isLocalName(name)) {
                 var importDeclaration = resolver.getReferencedImportDeclaration(name);
                 if (importDeclaration) {
                     if (ts.isImportClause(importDeclaration)) {
-                        return ts.setTextRange(ts.createPropertyAssignment(ts.getSynthesizedClone(name), ts.createPropertyAccess(ts.getGeneratedNameForNode(importDeclaration.parent), ts.createIdentifier("default"))), 
-                        /*location*/ node);
+                        return ts.setTextRange(ts.createPropertyAssignment(ts.getSynthesizedClone(name), ts.createPropertyAccess(ts.getGeneratedNameForNode(importDeclaration.parent), ts.createIdentifier("default"))), node);
                     }
                     else if (ts.isImportSpecifier(importDeclaration)) {
-                        return ts.setTextRange(ts.createPropertyAssignment(ts.getSynthesizedClone(name), ts.createPropertyAccess(ts.getGeneratedNameForNode(importDeclaration.parent.parent.parent), ts.getSynthesizedClone(importDeclaration.propertyName || importDeclaration.name))), 
-                        /*location*/ node);
+                        return ts.setTextRange(ts.createPropertyAssignment(ts.getSynthesizedClone(name), ts.createPropertyAccess(ts.getGeneratedNameForNode(importDeclaration.parent.parent.parent), ts.getSynthesizedClone(importDeclaration.propertyName || importDeclaration.name))), node);
                     }
                 }
             }
             return node;
         }
-        /**
-         * Substitute the expression, if necessary.
-         *
-         * @param node The node to substitute.
-         */
         function substituteExpression(node) {
             switch (node.kind) {
-                case 71 /* Identifier */:
+                case 71:
                     return substituteExpressionIdentifier(node);
-                case 200 /* BinaryExpression */:
+                case 200:
                     return substituteBinaryExpression(node);
-                case 198 /* PrefixUnaryExpression */:
-                case 199 /* PostfixUnaryExpression */:
+                case 198:
+                case 199:
                     return substituteUnaryExpression(node);
             }
             return node;
         }
-        /**
-         * Substitution for an Identifier expression that may contain an imported or exported symbol.
-         *
-         * @param node The node to substitute.
-         */
         function substituteExpressionIdentifier(node) {
-            if (ts.getEmitFlags(node) & 4096 /* HelperName */) {
+            if (ts.getEmitFlags(node) & 4096) {
                 var externalHelpersModuleName = ts.getExternalHelpersModuleName(currentSourceFile);
                 if (externalHelpersModuleName) {
                     return ts.createPropertyAccess(externalHelpersModuleName, node);
                 }
                 return node;
             }
-            // When we see an identifier in an expression position that
-            // points to an imported symbol, we should substitute a qualified
-            // reference to the imported symbol if one is needed.
-            //
-            // - We do not substitute generated identifiers for any reason.
-            // - We do not substitute identifiers tagged with the LocalName flag.
             if (!ts.isGeneratedIdentifier(node) && !ts.isLocalName(node)) {
                 var importDeclaration = resolver.getReferencedImportDeclaration(node);
                 if (importDeclaration) {
                     if (ts.isImportClause(importDeclaration)) {
-                        return ts.setTextRange(ts.createPropertyAccess(ts.getGeneratedNameForNode(importDeclaration.parent), ts.createIdentifier("default")), 
-                        /*location*/ node);
+                        return ts.setTextRange(ts.createPropertyAccess(ts.getGeneratedNameForNode(importDeclaration.parent), ts.createIdentifier("default")), node);
                     }
                     else if (ts.isImportSpecifier(importDeclaration)) {
-                        return ts.setTextRange(ts.createPropertyAccess(ts.getGeneratedNameForNode(importDeclaration.parent.parent.parent), ts.getSynthesizedClone(importDeclaration.propertyName || importDeclaration.name)), 
-                        /*location*/ node);
+                        return ts.setTextRange(ts.createPropertyAccess(ts.getGeneratedNameForNode(importDeclaration.parent.parent.parent), ts.getSynthesizedClone(importDeclaration.propertyName || importDeclaration.name)), node);
                     }
                 }
             }
             return node;
         }
-        /**
-         * Substitution for a BinaryExpression that may contain an imported or exported symbol.
-         *
-         * @param node The node to substitute.
-         */
         function substituteBinaryExpression(node) {
-            // When we see an assignment expression whose left-hand side is an exported symbol,
-            // we should ensure all exports of that symbol are updated with the correct value.
-            //
-            // - We do not substitute generated identifiers for any reason.
-            // - We do not substitute identifiers tagged with the LocalName flag.
-            // - We do not substitute identifiers that were originally the name of an enum or
-            //   namespace due to how they are transformed in TypeScript.
-            // - We only substitute identifiers that are exported at the top level.
             if (ts.isAssignmentOperator(node.operatorToken.kind)
                 && ts.isIdentifier(node.left)
                 && !ts.isGeneratedIdentifier(node.left)
@@ -74193,7 +59479,6 @@ var ts;
                 && !ts.isDeclarationNameOfEnumOrNamespace(node.left)) {
                 var exportedNames = getExports(node.left);
                 if (exportedNames) {
-                    // For each additional export of the declaration, apply an export assignment.
                     var expression = node;
                     for (var _i = 0, exportedNames_4 = exportedNames; _i < exportedNames_4.length; _i++) {
                         var exportName = exportedNames_4[_i];
@@ -74204,37 +59489,23 @@ var ts;
             }
             return node;
         }
-        /**
-         * Substitution for a UnaryExpression that may contain an imported or exported symbol.
-         *
-         * @param node The node to substitute.
-         */
         function substituteUnaryExpression(node) {
-            // When we see a prefix or postfix increment expression whose operand is an exported
-            // symbol, we should ensure all exports of that symbol are updated with the correct
-            // value.
-            //
-            // - We do not substitute generated identifiers for any reason.
-            // - We do not substitute identifiers tagged with the LocalName flag.
-            // - We do not substitute identifiers that were originally the name of an enum or
-            //   namespace due to how they are transformed in TypeScript.
-            // - We only substitute identifiers that are exported at the top level.
-            if ((node.operator === 43 /* PlusPlusToken */ || node.operator === 44 /* MinusMinusToken */)
+            if ((node.operator === 43 || node.operator === 44)
                 && ts.isIdentifier(node.operand)
                 && !ts.isGeneratedIdentifier(node.operand)
                 && !ts.isLocalName(node.operand)
                 && !ts.isDeclarationNameOfEnumOrNamespace(node.operand)) {
                 var exportedNames = getExports(node.operand);
                 if (exportedNames) {
-                    var expression = node.kind === 199 /* PostfixUnaryExpression */
+                    var expression = node.kind === 199
                         ? ts.setTextRange(ts.createPrefix(node.operator, node.operand), node)
                         : node;
                     for (var _i = 0, exportedNames_5 = exportedNames; _i < exportedNames_5.length; _i++) {
                         var exportName = exportedNames_5[_i];
                         expression = createExportExpression(exportName, preventSubstitution(expression));
                     }
-                    if (node.kind === 199 /* PostfixUnaryExpression */) {
-                        expression = node.operator === 43 /* PlusPlusToken */
+                    if (node.kind === 199) {
+                        expression = node.operator === 43
                             ? ts.createSubtract(preventSubstitution(expression), ts.createLiteral(1))
                             : ts.createAdd(preventSubstitution(expression), ts.createLiteral(1));
                     }
@@ -74243,19 +59514,14 @@ var ts;
             }
             return node;
         }
-        /**
-         * Gets the exports of a name.
-         *
-         * @param name The name.
-         */
         function getExports(name) {
             var exportedNames;
             if (!ts.isGeneratedIdentifier(name)) {
                 var valueDeclaration = resolver.getReferencedImportDeclaration(name)
                     || resolver.getReferencedValueDeclaration(name);
                 if (valueDeclaration) {
-                    var exportContainer = resolver.getReferencedExportContainer(name, /*prefixLocals*/ false);
-                    if (exportContainer && exportContainer.kind === 274 /* SourceFile */) {
+                    var exportContainer = resolver.getReferencedExportContainer(name, false);
+                    if (exportContainer && exportContainer.kind === 274) {
                         exportedNames = ts.append(exportedNames, ts.getDeclarationName(valueDeclaration));
                     }
                     exportedNames = ts.addRange(exportedNames, moduleInfo && moduleInfo.exportedBindings[ts.getOriginalNodeId(valueDeclaration)]);
@@ -74263,29 +59529,18 @@ var ts;
             }
             return exportedNames;
         }
-        /**
-         * Prevent substitution of a node for this transformer.
-         *
-         * @param node The node which should not be substituted.
-         */
         function preventSubstitution(node) {
             if (noSubstitution === undefined)
                 noSubstitution = [];
             noSubstitution[ts.getNodeId(node)] = true;
             return node;
         }
-        /**
-         * Determines whether a node should not be substituted.
-         *
-         * @param node The node to test.
-         */
         function isSubstitutionPrevented(node) {
             return noSubstitution && node.id && noSubstitution[node.id];
         }
     }
     ts.transformSystemModule = transformSystemModule;
 })(ts || (ts = {}));
-/*@internal*/
 var ts;
 (function (ts) {
     function transformES2015Module(context) {
@@ -74294,8 +59549,8 @@ var ts;
         var previousOnSubstituteNode = context.onSubstituteNode;
         context.onEmitNode = onEmitNode;
         context.onSubstituteNode = onSubstituteNode;
-        context.enableEmitNotification(274 /* SourceFile */);
-        context.enableSubstitution(71 /* Identifier */);
+        context.enableEmitNotification(274);
+        context.enableSubstitution(71);
         var currentSourceFile;
         return ts.chainBundle(transformSourceFile);
         function transformSourceFile(node) {
@@ -74307,10 +59562,8 @@ var ts;
                 if (externalHelpersModuleName) {
                     var statements = [];
                     var statementOffset = ts.addPrologue(statements, node.statements);
-                    var tslibImport = ts.createImportDeclaration(
-                    /*decorators*/ undefined, 
-                    /*modifiers*/ undefined, ts.createImportClause(/*name*/ undefined, ts.createNamespaceImport(externalHelpersModuleName)), ts.createLiteral(ts.externalHelpersModuleNameText));
-                    ts.addEmitFlags(tslibImport, 67108864 /* NeverApplyImportHelper */);
+                    var tslibImport = ts.createImportDeclaration(undefined, undefined, ts.createImportClause(undefined, ts.createNamespaceImport(externalHelpersModuleName)), ts.createLiteral(ts.externalHelpersModuleNameText));
+                    ts.addEmitFlags(tslibImport, 67108864);
                     ts.append(statements, tslibImport);
                     ts.addRange(statements, ts.visitNodes(node.statements, visitor, ts.isStatement, statementOffset));
                     return ts.updateSourceFileNode(node, ts.setTextRange(ts.createNodeArray(statements), node.statements));
@@ -74323,28 +59576,16 @@ var ts;
         }
         function visitor(node) {
             switch (node.kind) {
-                case 243 /* ImportEqualsDeclaration */:
-                    // Elide `import=` as it is not legal with --module ES6
+                case 243:
                     return undefined;
-                case 249 /* ExportAssignment */:
+                case 249:
                     return visitExportAssignment(node);
             }
             return node;
         }
         function visitExportAssignment(node) {
-            // Elide `export=` as it is not legal with --module ES6
             return node.isExportEquals ? undefined : node;
         }
-        //
-        // Emit Notification
-        //
-        /**
-         * Hook for node emit.
-         *
-         * @param hint A hint as to the intended usage of the node.
-         * @param node The node to emit.
-         * @param emit A callback used to emit the node in the printer.
-         */
         function onEmitNode(hint, node, emitCallback) {
             if (ts.isSourceFile(node)) {
                 currentSourceFile = node;
@@ -74355,24 +59596,15 @@ var ts;
                 previousOnEmitNode(hint, node, emitCallback);
             }
         }
-        //
-        // Substitutions
-        //
-        /**
-         * Hooks node substitutions.
-         *
-         * @param hint A hint as to the intended usage of the node.
-         * @param node The node to substitute.
-         */
         function onSubstituteNode(hint, node) {
             node = previousOnSubstituteNode(hint, node);
-            if (ts.isIdentifier(node) && hint === 1 /* Expression */) {
+            if (ts.isIdentifier(node) && hint === 1) {
                 return substituteExpressionIdentifier(node);
             }
             return node;
         }
         function substituteExpressionIdentifier(node) {
-            if (ts.getEmitFlags(node) & 4096 /* HelperName */) {
+            if (ts.getEmitFlags(node) & 4096) {
                 var externalHelpersModuleName = ts.getExternalHelpersModuleName(currentSourceFile);
                 if (externalHelpersModuleName) {
                     return ts.createPropertyAccess(externalHelpersModuleName, node);
@@ -74383,7 +59615,6 @@ var ts;
     }
     ts.transformES2015Module = transformES2015Module;
 })(ts || (ts = {}));
-/* @internal */
 var ts;
 (function (ts) {
     function canProduceDiagnostics(node) {
@@ -74426,16 +59657,16 @@ var ts;
             } : undefined;
         }
         function getAccessorNameVisibilityDiagnosticMessage(symbolAccessibilityResult) {
-            if (ts.hasModifier(node, 32 /* Static */)) {
+            if (ts.hasModifier(node, 32)) {
                 return symbolAccessibilityResult.errorModuleName ?
-                    symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                    symbolAccessibilityResult.accessibility === 2 ?
                         ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
                         ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2 :
                     ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_private_name_1;
             }
-            else if (node.parent.kind === 235 /* ClassDeclaration */) {
+            else if (node.parent.kind === 235) {
                 return symbolAccessibilityResult.errorModuleName ?
-                    symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                    symbolAccessibilityResult.accessibility === 2 ?
                         ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
                         ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2 :
                     ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_private_name_1;
@@ -74455,16 +59686,16 @@ var ts;
             } : undefined;
         }
         function getMethodNameVisibilityDiagnosticMessage(symbolAccessibilityResult) {
-            if (ts.hasModifier(node, 32 /* Static */)) {
+            if (ts.hasModifier(node, 32)) {
                 return symbolAccessibilityResult.errorModuleName ?
-                    symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                    symbolAccessibilityResult.accessibility === 2 ?
                         ts.Diagnostics.Public_static_method_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
                         ts.Diagnostics.Public_static_method_0_of_exported_class_has_or_is_using_name_1_from_private_module_2 :
                     ts.Diagnostics.Public_static_method_0_of_exported_class_has_or_is_using_private_name_1;
             }
-            else if (node.parent.kind === 235 /* ClassDeclaration */) {
+            else if (node.parent.kind === 235) {
                 return symbolAccessibilityResult.errorModuleName ?
-                    symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                    symbolAccessibilityResult.accessibility === 2 ?
                         ts.Diagnostics.Public_method_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
                         ts.Diagnostics.Public_method_0_of_exported_class_has_or_is_using_name_1_from_private_module_2 :
                     ts.Diagnostics.Public_method_0_of_exported_class_has_or_is_using_private_name_1;
@@ -74488,7 +59719,7 @@ var ts;
             return getReturnTypeVisibilityError;
         }
         else if (ts.isParameter(node)) {
-            if (ts.isParameterPropertyDeclaration(node) && ts.hasModifier(node.parent, 8 /* Private */)) {
+            if (ts.isParameterPropertyDeclaration(node) && ts.hasModifier(node.parent, 8)) {
                 return getVariableDeclarationTypeVisibilityError;
             }
             return getParameterDeclarationTypeVisibilityError;
@@ -74509,34 +59740,30 @@ var ts;
             return ts.Debug.assertNever(node, "Attempted to set a declaration diagnostic context for unhandled node kind: " + ts.SyntaxKind[node.kind]);
         }
         function getVariableDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult) {
-            if (node.kind === 232 /* VariableDeclaration */ || node.kind === 182 /* BindingElement */) {
+            if (node.kind === 232 || node.kind === 182) {
                 return symbolAccessibilityResult.errorModuleName ?
-                    symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                    symbolAccessibilityResult.accessibility === 2 ?
                         ts.Diagnostics.Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
                         ts.Diagnostics.Exported_variable_0_has_or_is_using_name_1_from_private_module_2 :
                     ts.Diagnostics.Exported_variable_0_has_or_is_using_private_name_1;
             }
-            // This check is to ensure we don't report error on constructor parameter property as that error would be reported during parameter emit
-            // The only exception here is if the constructor was marked as private. we are not emitting the constructor parameters at all.
-            else if (node.kind === 152 /* PropertyDeclaration */ || node.kind === 151 /* PropertySignature */ ||
-                (node.kind === 149 /* Parameter */ && ts.hasModifier(node.parent, 8 /* Private */))) {
-                // TODO(jfreeman): Deal with computed properties in error reporting.
-                if (ts.hasModifier(node, 32 /* Static */)) {
+            else if (node.kind === 152 || node.kind === 151 ||
+                (node.kind === 149 && ts.hasModifier(node.parent, 8))) {
+                if (ts.hasModifier(node, 32)) {
                     return symbolAccessibilityResult.errorModuleName ?
-                        symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                        symbolAccessibilityResult.accessibility === 2 ?
                             ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
                             ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2 :
                         ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_private_name_1;
                 }
-                else if (node.parent.kind === 235 /* ClassDeclaration */ || node.kind === 149 /* Parameter */) {
+                else if (node.parent.kind === 235 || node.kind === 149) {
                     return symbolAccessibilityResult.errorModuleName ?
-                        symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                        symbolAccessibilityResult.accessibility === 2 ?
                             ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
                             ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2 :
                         ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_private_name_1;
                 }
                 else {
-                    // Interfaces cannot have types that cannot be named
                     return symbolAccessibilityResult.errorModuleName ?
                         ts.Diagnostics.Property_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2 :
                         ts.Diagnostics.Property_0_of_exported_interface_has_or_is_using_private_name_1;
@@ -74553,10 +59780,8 @@ var ts;
         }
         function getAccessorDeclarationTypeVisibilityError(symbolAccessibilityResult) {
             var diagnosticMessage;
-            if (node.kind === 157 /* SetAccessor */) {
-                // Getters can infer the return type from the returned expression, but setters cannot, so the
-                // "_from_external_module_1_but_cannot_be_named" case cannot occur.
-                if (ts.hasModifier(node, 32 /* Static */)) {
+            if (node.kind === 157) {
+                if (ts.hasModifier(node, 32)) {
                     diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
                         ts.Diagnostics.Parameter_type_of_public_static_setter_0_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
                         ts.Diagnostics.Parameter_type_of_public_static_setter_0_from_exported_class_has_or_is_using_private_name_1;
@@ -74568,16 +59793,16 @@ var ts;
                 }
             }
             else {
-                if (ts.hasModifier(node, 32 /* Static */)) {
+                if (ts.hasModifier(node, 32)) {
                     diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                        symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                        symbolAccessibilityResult.accessibility === 2 ?
                             ts.Diagnostics.Return_type_of_public_static_getter_0_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
                             ts.Diagnostics.Return_type_of_public_static_getter_0_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
                         ts.Diagnostics.Return_type_of_public_static_getter_0_from_exported_class_has_or_is_using_private_name_1;
                 }
                 else {
                     diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                        symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                        symbolAccessibilityResult.accessibility === 2 ?
                             ts.Diagnostics.Return_type_of_public_getter_0_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
                             ts.Diagnostics.Return_type_of_public_getter_0_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
                         ts.Diagnostics.Return_type_of_public_getter_0_from_exported_class_has_or_is_using_private_name_1;
@@ -74592,50 +59817,46 @@ var ts;
         function getReturnTypeVisibilityError(symbolAccessibilityResult) {
             var diagnosticMessage;
             switch (node.kind) {
-                case 159 /* ConstructSignature */:
-                    // Interfaces cannot have return types that cannot be named
+                case 159:
                     diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
                         ts.Diagnostics.Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
                         ts.Diagnostics.Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_0;
                     break;
-                case 158 /* CallSignature */:
-                    // Interfaces cannot have return types that cannot be named
+                case 158:
                     diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
                         ts.Diagnostics.Return_type_of_call_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
                         ts.Diagnostics.Return_type_of_call_signature_from_exported_interface_has_or_is_using_private_name_0;
                     break;
-                case 160 /* IndexSignature */:
-                    // Interfaces cannot have return types that cannot be named
+                case 160:
                     diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
                         ts.Diagnostics.Return_type_of_index_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
                         ts.Diagnostics.Return_type_of_index_signature_from_exported_interface_has_or_is_using_private_name_0;
                     break;
-                case 154 /* MethodDeclaration */:
-                case 153 /* MethodSignature */:
-                    if (ts.hasModifier(node, 32 /* Static */)) {
+                case 154:
+                case 153:
+                    if (ts.hasModifier(node, 32)) {
                         diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                            symbolAccessibilityResult.accessibility === 2 ?
                                 ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
                                 ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
                             ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_private_name_0;
                     }
-                    else if (node.parent.kind === 235 /* ClassDeclaration */) {
+                    else if (node.parent.kind === 235) {
                         diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                            symbolAccessibilityResult.accessibility === 2 ?
                                 ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
                                 ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
                             ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_private_name_0;
                     }
                     else {
-                        // Interfaces cannot have return types that cannot be named
                         diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
                             ts.Diagnostics.Return_type_of_method_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
                             ts.Diagnostics.Return_type_of_method_from_exported_interface_has_or_is_using_private_name_0;
                     }
                     break;
-                case 234 /* FunctionDeclaration */:
+                case 234:
                     diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                        symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                        symbolAccessibilityResult.accessibility === 2 ?
                             ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
                             ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_name_0_from_private_module_1 :
                         ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_private_name_0;
@@ -74658,54 +59879,50 @@ var ts;
         }
         function getParameterDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult) {
             switch (node.parent.kind) {
-                case 155 /* Constructor */:
+                case 155:
                     return symbolAccessibilityResult.errorModuleName ?
-                        symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                        symbolAccessibilityResult.accessibility === 2 ?
                             ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
                             ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
                         ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_private_name_1;
-                case 159 /* ConstructSignature */:
-                case 164 /* ConstructorType */:
-                    // Interfaces cannot have parameter types that cannot be named
+                case 159:
+                case 164:
                     return symbolAccessibilityResult.errorModuleName ?
                         ts.Diagnostics.Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
                         ts.Diagnostics.Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1;
-                case 158 /* CallSignature */:
-                    // Interfaces cannot have parameter types that cannot be named
+                case 158:
                     return symbolAccessibilityResult.errorModuleName ?
                         ts.Diagnostics.Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
                         ts.Diagnostics.Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1;
-                case 160 /* IndexSignature */:
-                    // Interfaces cannot have parameter types that cannot be named
+                case 160:
                     return symbolAccessibilityResult.errorModuleName ?
                         ts.Diagnostics.Parameter_0_of_index_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
                         ts.Diagnostics.Parameter_0_of_index_signature_from_exported_interface_has_or_is_using_private_name_1;
-                case 154 /* MethodDeclaration */:
-                case 153 /* MethodSignature */:
-                    if (ts.hasModifier(node.parent, 32 /* Static */)) {
+                case 154:
+                case 153:
+                    if (ts.hasModifier(node.parent, 32)) {
                         return symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                            symbolAccessibilityResult.accessibility === 2 ?
                                 ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
                                 ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
                             ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1;
                     }
-                    else if (node.parent.parent.kind === 235 /* ClassDeclaration */) {
+                    else if (node.parent.parent.kind === 235) {
                         return symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                            symbolAccessibilityResult.accessibility === 2 ?
                                 ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
                                 ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
                             ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1;
                     }
                     else {
-                        // Interfaces cannot have parameter types that cannot be named
                         return symbolAccessibilityResult.errorModuleName ?
                             ts.Diagnostics.Parameter_0_of_method_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
                             ts.Diagnostics.Parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1;
                     }
-                case 234 /* FunctionDeclaration */:
-                case 163 /* FunctionType */:
+                case 234:
+                case 163:
                     return symbolAccessibilityResult.errorModuleName ?
-                        symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                        symbolAccessibilityResult.accessibility === 2 ?
                             ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
                             ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_name_1_from_private_module_2 :
                         ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_private_name_1;
@@ -74714,37 +59931,36 @@ var ts;
             }
         }
         function getTypeParameterConstraintVisibilityError() {
-            // Type parameter constraints are named by user so we should always be able to name it
             var diagnosticMessage;
             switch (node.parent.kind) {
-                case 235 /* ClassDeclaration */:
+                case 235:
                     diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_class_has_or_is_using_private_name_1;
                     break;
-                case 236 /* InterfaceDeclaration */:
+                case 236:
                     diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1;
                     break;
-                case 159 /* ConstructSignature */:
+                case 159:
                     diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1;
                     break;
-                case 158 /* CallSignature */:
+                case 158:
                     diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1;
                     break;
-                case 154 /* MethodDeclaration */:
-                case 153 /* MethodSignature */:
-                    if (ts.hasModifier(node.parent, 32 /* Static */)) {
+                case 154:
+                case 153:
+                    if (ts.hasModifier(node.parent, 32)) {
                         diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1;
                     }
-                    else if (node.parent.parent.kind === 235 /* ClassDeclaration */) {
+                    else if (node.parent.parent.kind === 235) {
                         diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1;
                     }
                     else {
                         diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1;
                     }
                     break;
-                case 234 /* FunctionDeclaration */:
+                case 234:
                     diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_function_has_or_is_using_private_name_1;
                     break;
-                case 237 /* TypeAliasDeclaration */:
+                case 237:
                     diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_type_alias_has_or_is_using_private_name_1;
                     break;
                 default:
@@ -74758,15 +59974,12 @@ var ts;
         }
         function getHeritageClauseVisibilityError() {
             var diagnosticMessage;
-            // Heritage clause is written by user so it can always be named
-            if (node.parent.parent.kind === 235 /* ClassDeclaration */) {
-                // Class or Interface implemented/extended is inaccessible
-                diagnosticMessage = node.parent.token === 108 /* ImplementsKeyword */ ?
+            if (node.parent.parent.kind === 235) {
+                diagnosticMessage = node.parent.token === 108 ?
                     ts.Diagnostics.Implements_clause_of_exported_class_0_has_or_is_using_private_name_1 :
                     ts.Diagnostics.extends_clause_of_exported_class_0_has_or_is_using_private_name_1;
             }
             else {
-                // interface is inaccessible
                 diagnosticMessage = ts.Diagnostics.extends_clause_of_exported_interface_0_has_or_is_using_private_name_1;
             }
             return {
@@ -74792,30 +60005,23 @@ var ts;
     }
     ts.createGetSymbolAccessibilityDiagnosticForNode = createGetSymbolAccessibilityDiagnosticForNode;
 })(ts || (ts = {}));
-/*@internal*/
 var ts;
 (function (ts) {
     function getDeclarationDiagnostics(host, resolver, file) {
         if (file && ts.isSourceFileJavaScript(file)) {
-            return []; // No declaration diagnostics for js for now
+            return [];
         }
         var compilerOptions = host.getCompilerOptions();
-        var result = ts.transformNodes(resolver, host, compilerOptions, file ? [file] : ts.filter(host.getSourceFiles(), ts.isSourceFileNotJavaScript), [transformDeclarations], /*allowDtsFiles*/ false);
+        var result = ts.transformNodes(resolver, host, compilerOptions, file ? [file] : ts.filter(host.getSourceFiles(), ts.isSourceFileNotJavaScript), [transformDeclarations], false);
         return result.diagnostics;
     }
     ts.getDeclarationDiagnostics = getDeclarationDiagnostics;
-    var declarationEmitNodeBuilderFlags = 1024 /* MultilineObjectLiterals */ |
-        2048 /* WriteClassExpressionAsTypeLiteral */ |
-        4096 /* UseTypeOfFunction */ |
-        8 /* UseStructuralFallback */ |
-        524288 /* AllowEmptyTuple */ |
-        4 /* GenerateNamesForShadowedTypeParams */;
-    /**
-     * Transforms a ts file into a .d.ts file
-     * This process requires type information, which is retrieved through the emit resolver. Because of this,
-     * in many places this transformer assumes it will be operating on parse tree nodes directly.
-     * This means that _no transforms should be allowed to occur before this one_.
-     */
+    var declarationEmitNodeBuilderFlags = 1024 |
+        2048 |
+        4096 |
+        8 |
+        524288 |
+        4;
     function transformDeclarations(context) {
         var throwDiagnostic = function () { return ts.Debug.fail("Diagnostic emitted without context"); };
         var getSymbolAccessibilityDiagnostic = throwDiagnostic;
@@ -74851,8 +60057,8 @@ var ts;
                 return;
             }
             necessaryTypeRefernces = necessaryTypeRefernces || ts.createMap();
-            for (var _i = 0, typeReferenceDirectives_1 = typeReferenceDirectives; _i < typeReferenceDirectives_1.length; _i++) {
-                var ref = typeReferenceDirectives_1[_i];
+            for (var _i = 0, typeReferenceDirectives_2 = typeReferenceDirectives; _i < typeReferenceDirectives_2.length; _i++) {
+                var ref = typeReferenceDirectives_2[_i];
                 necessaryTypeRefernces.set(ref, true);
             }
         }
@@ -74861,8 +60067,7 @@ var ts;
             refs.set("" + ts.getOriginalNodeId(container), container);
         }
         function handleSymbolAccessibilityError(symbolAccessibilityResult) {
-            if (symbolAccessibilityResult.accessibility === 0 /* Accessible */) {
-                // Add aliases back onto the possible imports list if they're not there so we can try them again with updated visibility info
+            if (symbolAccessibilityResult.accessibility === 0) {
                 if (symbolAccessibilityResult && symbolAccessibilityResult.aliasesToMakeVisible) {
                     if (!lateMarkedStatements) {
                         lateMarkedStatements = symbolAccessibilityResult.aliasesToMakeVisible;
@@ -74874,10 +60079,8 @@ var ts;
                         }
                     }
                 }
-                // TODO: Do all these accessibility checks inside/after the first pass in the checker when declarations are enabled, if possible
             }
             else {
-                // Report error
                 var errorInfo = getSymbolAccessibilityDiagnostic(symbolAccessibilityResult);
                 if (errorInfo) {
                     if (errorInfo.typeName) {
@@ -74890,9 +60093,9 @@ var ts;
             }
         }
         function trackSymbol(symbol, enclosingDeclaration, meaning) {
-            if (symbol.flags & 262144 /* TypeParameter */)
+            if (symbol.flags & 262144)
                 return;
-            handleSymbolAccessibilityError(resolver.isSymbolAccessible(symbol, enclosingDeclaration, meaning, /*shouldComputeAliasesToMakeVisible*/ true));
+            handleSymbolAccessibilityError(resolver.isSymbolAccessible(symbol, enclosingDeclaration, meaning, true));
             recordTypeReferenceDirectivesIfNecessary(resolver.getTypeReferenceDirectivesForSymbol(symbol, meaning));
         }
         function reportPrivateInBaseOfClassExpression(propertyName) {
@@ -74911,16 +60114,16 @@ var ts;
             }
         }
         function transformRoot(node) {
-            if (node.kind === 274 /* SourceFile */ && (node.isDeclarationFile || ts.isSourceFileJavaScript(node))) {
+            if (node.kind === 274 && (node.isDeclarationFile || ts.isSourceFileJavaScript(node))) {
                 return node;
             }
-            if (node.kind === 275 /* Bundle */) {
+            if (node.kind === 275) {
                 isBundledEmit = true;
                 var refs_1 = ts.createMap();
                 var hasNoDefaultLib_1 = false;
                 var bundle = ts.createBundle(ts.map(node.sourceFiles, function (sourceFile) {
                     if (sourceFile.isDeclarationFile || ts.isSourceFileJavaScript(sourceFile))
-                        return undefined; // Omit declaration files from bundle results, too // TODO: GH#18217
+                        return undefined;
                     hasNoDefaultLib_1 = hasNoDefaultLib_1 || sourceFile.hasNoDefaultLib;
                     currentSourceFile = sourceFile;
                     enclosingDeclaration = sourceFile;
@@ -74932,29 +60135,28 @@ var ts;
                     resultHasScopeMarker = false;
                     collectReferences(sourceFile, refs_1);
                     if (ts.isExternalModule(sourceFile)) {
-                        resultHasExternalModuleIndicator = false; // unused in external module bundle emit (all external modules are within module blocks, therefore are known to be modules)
+                        resultHasExternalModuleIndicator = false;
                         needsDeclare = false;
                         var statements_5 = ts.visitNodes(sourceFile.statements, visitDeclarationStatements);
-                        var newFile = ts.updateSourceFileNode(sourceFile, [ts.createModuleDeclaration([], [ts.createModifier(124 /* DeclareKeyword */)], ts.createLiteral(ts.getResolvedExternalModuleName(context.getEmitHost(), sourceFile)), ts.createModuleBlock(ts.setTextRange(ts.createNodeArray(transformAndReplaceLatePaintedStatements(statements_5)), sourceFile.statements)))], /*isDeclarationFile*/ true, /*referencedFiles*/ [], /*typeReferences*/ [], /*hasNoDefaultLib*/ false, /*libReferences*/ []);
+                        var newFile = ts.updateSourceFileNode(sourceFile, [ts.createModuleDeclaration([], [ts.createModifier(124)], ts.createLiteral(ts.getResolvedExternalModuleName(context.getEmitHost(), sourceFile)), ts.createModuleBlock(ts.setTextRange(ts.createNodeArray(transformAndReplaceLatePaintedStatements(statements_5)), sourceFile.statements)))], true, [], [], false, []);
                         return newFile;
                     }
                     needsDeclare = true;
                     var updated = ts.visitNodes(sourceFile.statements, visitDeclarationStatements);
-                    return ts.updateSourceFileNode(sourceFile, transformAndReplaceLatePaintedStatements(updated), /*isDeclarationFile*/ true, /*referencedFiles*/ [], /*typeReferences*/ [], /*hasNoDefaultLib*/ false, /*libReferences*/ []);
+                    return ts.updateSourceFileNode(sourceFile, transformAndReplaceLatePaintedStatements(updated), true, [], [], false, []);
                 }), ts.mapDefined(node.prepends, function (prepend) {
-                    if (prepend.kind === 277 /* InputFiles */) {
+                    if (prepend.kind === 277) {
                         return ts.createUnparsedSourceFile(prepend.declarationText, prepend.declarationMapText);
                     }
                 }));
                 bundle.syntheticFileReferences = [];
                 bundle.syntheticTypeReferences = getFileReferencesForUsedTypeReferences();
                 bundle.hasNoDefaultLib = hasNoDefaultLib_1;
-                var outputFilePath_1 = ts.getDirectoryPath(ts.normalizeSlashes(ts.getOutputPathsFor(node, host, /*forceDtsPaths*/ true).declarationFilePath));
+                var outputFilePath_1 = ts.getDirectoryPath(ts.normalizeSlashes(ts.getOutputPathsFor(node, host, true).declarationFilePath));
                 var referenceVisitor_1 = mapReferencesIntoArray(bundle.syntheticFileReferences, outputFilePath_1);
                 refs_1.forEach(referenceVisitor_1);
                 return bundle;
             }
-            // Single source file
             needsDeclare = true;
             needsScopeFixMarker = false;
             resultHasScopeMarker = false;
@@ -74969,22 +60171,21 @@ var ts;
             necessaryTypeRefernces = undefined;
             refs = collectReferences(currentSourceFile, ts.createMap());
             var references = [];
-            var outputFilePath = ts.getDirectoryPath(ts.normalizeSlashes(ts.getOutputPathsFor(node, host, /*forceDtsPaths*/ true).declarationFilePath));
+            var outputFilePath = ts.getDirectoryPath(ts.normalizeSlashes(ts.getOutputPathsFor(node, host, true).declarationFilePath));
             var referenceVisitor = mapReferencesIntoArray(references, outputFilePath);
             var statements = ts.visitNodes(node.statements, visitDeclarationStatements);
             var combinedStatements = ts.setTextRange(ts.createNodeArray(transformAndReplaceLatePaintedStatements(statements)), node.statements);
             refs.forEach(referenceVisitor);
             var emittedImports = ts.filter(combinedStatements, ts.isAnyImportSyntax);
             if (ts.isExternalModule(node) && (!resultHasExternalModuleIndicator || (needsScopeFixMarker && !resultHasScopeMarker))) {
-                combinedStatements = ts.setTextRange(ts.createNodeArray(combinedStatements.concat([ts.createExportDeclaration(/*decorators*/ undefined, /*modifiers*/ undefined, ts.createNamedExports([]), /*moduleSpecifier*/ undefined)])), combinedStatements);
+                combinedStatements = ts.setTextRange(ts.createNodeArray(combinedStatements.concat([ts.createExportDeclaration(undefined, undefined, ts.createNamedExports([]), undefined)])), combinedStatements);
             }
-            var updated = ts.updateSourceFileNode(node, combinedStatements, /*isDeclarationFile*/ true, references, getFileReferencesForUsedTypeReferences(), node.hasNoDefaultLib);
+            var updated = ts.updateSourceFileNode(node, combinedStatements, true, references, getFileReferencesForUsedTypeReferences(), node.hasNoDefaultLib);
             return updated;
             function getFileReferencesForUsedTypeReferences() {
                 return necessaryTypeRefernces ? ts.mapDefined(ts.arrayFrom(necessaryTypeRefernces.keys()), getFileReferenceForTypeName) : [];
             }
             function getFileReferenceForTypeName(typeName) {
-                // Elide type references for which we have imports
                 if (emittedImports) {
                     for (var _i = 0, emittedImports_1 = emittedImports; _i < emittedImports_1.length; _i++) {
                         var importStatement = emittedImports_1[_i];
@@ -75004,18 +60205,17 @@ var ts;
             function mapReferencesIntoArray(references, outputFilePath) {
                 return function (file) {
                     var declFileName;
-                    if (file.isDeclarationFile) { // Neither decl files or js should have their refs changed
+                    if (file.isDeclarationFile) {
                         declFileName = file.fileName;
                     }
                     else {
                         if (isBundledEmit && ts.contains(node.sourceFiles, file))
-                            return; // Omit references to files which are being merged
-                        var paths = ts.getOutputPathsFor(file, host, /*forceDtsPaths*/ true);
+                            return;
+                        var paths = ts.getOutputPathsFor(file, host, true);
                         declFileName = paths.declarationFilePath || paths.jsFilePath;
                     }
                     if (declFileName) {
-                        var fileName = ts.getRelativePathToDirectoryOrUrl(outputFilePath, declFileName, host.getCurrentDirectory(), host.getCanonicalFileName, 
-                        /*isAbsolutePathAnUrl*/ false);
+                        var fileName = ts.getRelativePathToDirectoryOrUrl(outputFilePath, declFileName, host.getCurrentDirectory(), host.getCanonicalFileName, false);
                         if (ts.startsWith(fileName, "./") && ts.hasExtension(fileName)) {
                             fileName = fileName.substring(2);
                         }
@@ -75036,11 +60236,11 @@ var ts;
             return ret;
         }
         function filterBindingPatternInitializers(name) {
-            if (name.kind === 71 /* Identifier */) {
+            if (name.kind === 71) {
                 return name;
             }
             else {
-                if (name.kind === 181 /* ArrayBindingPattern */) {
+                if (name.kind === 181) {
                     return ts.updateArrayBindingPattern(name, ts.visitNodes(name.elements, visitBindingElement));
                 }
                 else {
@@ -75048,7 +60248,7 @@ var ts;
                 }
             }
             function visitBindingElement(elem) {
-                if (elem.kind === 206 /* OmittedExpression */) {
+                if (elem.kind === 206) {
                     return elem;
                 }
                 return ts.updateBindingElement(elem, elem.dotDotDotToken, elem.propertyName, filterBindingPatternInitializers(elem.name), shouldPrintWithInitializer(elem) ? elem.initializer : undefined);
@@ -75060,45 +60260,39 @@ var ts;
                 oldDiag = getSymbolAccessibilityDiagnostic;
                 getSymbolAccessibilityDiagnostic = ts.createGetSymbolAccessibilityDiagnosticForNode(p);
             }
-            var newParam = ts.updateParameter(p, 
-            /*decorators*/ undefined, maskModifiers(p, modifierMask), p.dotDotDotToken, filterBindingPatternInitializers(p.name), resolver.isOptionalParameter(p) ? (p.questionToken || ts.createToken(55 /* QuestionToken */)) : undefined, ensureType(p, p.type, /*ignorePrivate*/ true), // Ignore private param props, since this type is going straight back into a param
-            ensureNoInitializer(p));
+            var newParam = ts.updateParameter(p, undefined, maskModifiers(p, modifierMask), p.dotDotDotToken, filterBindingPatternInitializers(p.name), resolver.isOptionalParameter(p) ? (p.questionToken || ts.createToken(55)) : undefined, ensureType(p, p.type, true), ensureNoInitializer(p));
             if (!suppressNewDiagnosticContexts) {
                 getSymbolAccessibilityDiagnostic = oldDiag;
             }
             return newParam;
         }
         function shouldPrintWithInitializer(node) {
-            return canHaveLiteralInitializer(node) && resolver.isLiteralConstDeclaration(ts.getParseTreeNode(node)); // TODO: Make safe
+            return canHaveLiteralInitializer(node) && resolver.isLiteralConstDeclaration(ts.getParseTreeNode(node));
         }
         function ensureNoInitializer(node) {
             if (shouldPrintWithInitializer(node)) {
-                return resolver.createLiteralConstValue(ts.getParseTreeNode(node)); // TODO: Make safe
+                return resolver.createLiteralConstValue(ts.getParseTreeNode(node));
             }
             return undefined;
         }
         function ensureType(node, type, ignorePrivate) {
-            if (!ignorePrivate && ts.hasModifier(node, 8 /* Private */)) {
-                // Private nodes emit no types (except private parameter properties, whose parameter types are actually visible)
+            if (!ignorePrivate && ts.hasModifier(node, 8)) {
                 return;
             }
             if (shouldPrintWithInitializer(node)) {
-                // Literal const declarations will have an initializer ensured rather than a type
                 return;
             }
-            var shouldUseResolverType = node.kind === 149 /* Parameter */ &&
+            var shouldUseResolverType = node.kind === 149 &&
                 (resolver.isRequiredInitializedParameter(node) ||
                     resolver.isOptionalUninitializedParameterProperty(node));
             if (type && !shouldUseResolverType) {
                 return ts.visitNode(type, visitDeclarationSubtree);
             }
             if (!ts.getParseTreeNode(node)) {
-                return type ? ts.visitNode(type, visitDeclarationSubtree) : ts.createKeywordTypeNode(119 /* AnyKeyword */);
+                return type ? ts.visitNode(type, visitDeclarationSubtree) : ts.createKeywordTypeNode(119);
             }
-            if (node.kind === 157 /* SetAccessor */) {
-                // Set accessors with no associated type node (from it's param or get accessor return) are `any` since they are never contextually typed right now
-                // (The inferred type here will be void, but the old declaration emitter printed `any`, so this replicates that)
-                return ts.createKeywordTypeNode(119 /* AnyKeyword */);
+            if (node.kind === 157) {
+                return ts.createKeywordTypeNode(119);
             }
             errorNameNode = node.name;
             var oldDiag;
@@ -75106,12 +60300,12 @@ var ts;
                 oldDiag = getSymbolAccessibilityDiagnostic;
                 getSymbolAccessibilityDiagnostic = ts.createGetSymbolAccessibilityDiagnosticForNode(node);
             }
-            if (node.kind === 232 /* VariableDeclaration */ || node.kind === 182 /* BindingElement */) {
+            if (node.kind === 232 || node.kind === 182) {
                 return cleanup(resolver.createTypeOfDeclaration(node, enclosingDeclaration, declarationEmitNodeBuilderFlags, symbolTracker));
             }
-            if (node.kind === 149 /* Parameter */
-                || node.kind === 152 /* PropertyDeclaration */
-                || node.kind === 151 /* PropertySignature */) {
+            if (node.kind === 149
+                || node.kind === 152
+                || node.kind === 151) {
                 if (!node.initializer)
                     return cleanup(resolver.createTypeOfDeclaration(node, enclosingDeclaration, declarationEmitNodeBuilderFlags, symbolTracker, shouldUseResolverType));
                 return cleanup(resolver.createTypeOfDeclaration(node, enclosingDeclaration, declarationEmitNodeBuilderFlags, symbolTracker, shouldUseResolverType) || resolver.createTypeOfExpression(node.initializer, enclosingDeclaration, declarationEmitNodeBuilderFlags, symbolTracker));
@@ -75122,26 +60316,25 @@ var ts;
                 if (!suppressNewDiagnosticContexts) {
                     getSymbolAccessibilityDiagnostic = oldDiag;
                 }
-                return returnValue || ts.createKeywordTypeNode(119 /* AnyKeyword */);
+                return returnValue || ts.createKeywordTypeNode(119);
             }
         }
         function isDeclarationAndNotVisible(node) {
             node = ts.getParseTreeNode(node);
             switch (node.kind) {
-                case 234 /* FunctionDeclaration */:
-                case 239 /* ModuleDeclaration */:
-                case 236 /* InterfaceDeclaration */:
-                case 235 /* ClassDeclaration */:
-                case 237 /* TypeAliasDeclaration */:
-                case 238 /* EnumDeclaration */:
+                case 234:
+                case 239:
+                case 236:
+                case 235:
+                case 237:
+                case 238:
                     return !resolver.isDeclarationVisible(node);
-                // The following should be doing their own visibility checks based on filtering their members
-                case 232 /* VariableDeclaration */:
+                case 232:
                     return !getBindingNameVisible(node);
-                case 243 /* ImportEqualsDeclaration */:
-                case 244 /* ImportDeclaration */:
-                case 250 /* ExportDeclaration */:
-                case 249 /* ExportAssignment */:
+                case 243:
+                case 244:
+                case 250:
+                case 249:
                     return false;
             }
             return false;
@@ -75151,7 +60344,6 @@ var ts;
                 return false;
             }
             if (ts.isBindingPattern(elem.name)) {
-                // If any child binding pattern element has been marked visible (usually by collect linked aliases), then this is visible
                 return ts.some(elem.name.elements, getBindingNameVisible);
             }
             else {
@@ -75159,17 +60351,17 @@ var ts;
             }
         }
         function updateParamsList(node, params, modifierMask) {
-            if (ts.hasModifier(node, 8 /* Private */)) {
-                return undefined; // TODO: GH#18217
+            if (ts.hasModifier(node, 8)) {
+                return undefined;
             }
             var newParams = ts.map(params, function (p) { return ensureParameter(p, modifierMask); });
             if (!newParams) {
-                return undefined; // TODO: GH#18217
+                return undefined;
             }
             return ts.createNodeArray(newParams, params.hasTrailingComma);
         }
         function ensureTypeParams(node, params) {
-            return ts.hasModifier(node, 8 /* Private */) ? undefined : ts.visitNodes(params, visitDeclarationSubtree);
+            return ts.hasModifier(node, 8) ? undefined : ts.visitNodes(params, visitDeclarationSubtree);
         }
         function isEnclosingDeclaration(node) {
             return ts.isSourceFile(node)
@@ -75194,9 +60386,9 @@ var ts;
         }
         function rewriteModuleSpecifier(parent, input) {
             if (!input)
-                return undefined; // TODO: GH#18217
-            resultHasExternalModuleIndicator = resultHasExternalModuleIndicator || (parent.kind !== 239 /* ModuleDeclaration */ && parent.kind !== 179 /* ImportType */);
-            if (input.kind === 9 /* StringLiteral */ && isBundledEmit) {
+                return undefined;
+            resultHasExternalModuleIndicator = resultHasExternalModuleIndicator || (parent.kind !== 239 && parent.kind !== 179);
+            if (input.kind === 9 && isBundledEmit) {
                 var newName = ts.getExternalModuleNameFromDeclaration(context.getEmitHost(), resolver, parent);
                 if (newName) {
                     return ts.createLiteral(newName);
@@ -75207,11 +60399,9 @@ var ts;
         function transformImportEqualsDeclaration(decl) {
             if (!resolver.isDeclarationVisible(decl))
                 return;
-            if (decl.moduleReference.kind === 254 /* ExternalModuleReference */) {
-                // Rewrite external module names if necessary
+            if (decl.moduleReference.kind === 254) {
                 var specifier = ts.getExternalModuleImportEqualsDeclarationExpression(decl);
-                return ts.updateImportEqualsDeclaration(decl, 
-                /*decorators*/ undefined, decl.modifiers, decl.name, ts.updateExternalModuleReference(decl.moduleReference, rewriteModuleSpecifier(decl, specifier)));
+                return ts.updateImportEqualsDeclaration(decl, undefined, decl.modifiers, decl.name, ts.updateExternalModuleReference(decl.moduleReference, rewriteModuleSpecifier(decl, specifier)));
             }
             else {
                 var oldDiag = getSymbolAccessibilityDiagnostic;
@@ -75223,55 +60413,30 @@ var ts;
         }
         function transformImportDeclaration(decl) {
             if (!decl.importClause) {
-                // import "mod" - possibly needed for side effects? (global interface patches, module augmentations, etc)
-                return ts.updateImportDeclaration(decl, 
-                /*decorators*/ undefined, decl.modifiers, decl.importClause, rewriteModuleSpecifier(decl, decl.moduleSpecifier));
+                return ts.updateImportDeclaration(decl, undefined, decl.modifiers, decl.importClause, rewriteModuleSpecifier(decl, decl.moduleSpecifier));
             }
-            // The `importClause` visibility corresponds to the default's visibility.
             var visibleDefaultBinding = decl.importClause && decl.importClause.name && resolver.isDeclarationVisible(decl.importClause) ? decl.importClause.name : undefined;
             if (!decl.importClause.namedBindings) {
-                // No named bindings (either namespace or list), meaning the import is just default or should be elided
-                return visibleDefaultBinding && ts.updateImportDeclaration(decl, /*decorators*/ undefined, decl.modifiers, ts.updateImportClause(decl.importClause, visibleDefaultBinding, 
-                /*namedBindings*/ undefined), rewriteModuleSpecifier(decl, decl.moduleSpecifier));
+                return visibleDefaultBinding && ts.updateImportDeclaration(decl, undefined, decl.modifiers, ts.updateImportClause(decl.importClause, visibleDefaultBinding, undefined), rewriteModuleSpecifier(decl, decl.moduleSpecifier));
             }
-            if (decl.importClause.namedBindings.kind === 246 /* NamespaceImport */) {
-                // Namespace import (optionally with visible default)
-                var namedBindings = resolver.isDeclarationVisible(decl.importClause.namedBindings) ? decl.importClause.namedBindings : /*namedBindings*/ undefined;
-                return visibleDefaultBinding || namedBindings ? ts.updateImportDeclaration(decl, /*decorators*/ undefined, decl.modifiers, ts.updateImportClause(decl.importClause, visibleDefaultBinding, namedBindings), rewriteModuleSpecifier(decl, decl.moduleSpecifier)) : undefined;
+            if (decl.importClause.namedBindings.kind === 246) {
+                var namedBindings = resolver.isDeclarationVisible(decl.importClause.namedBindings) ? decl.importClause.namedBindings : undefined;
+                return visibleDefaultBinding || namedBindings ? ts.updateImportDeclaration(decl, undefined, decl.modifiers, ts.updateImportClause(decl.importClause, visibleDefaultBinding, namedBindings), rewriteModuleSpecifier(decl, decl.moduleSpecifier)) : undefined;
             }
-            // Named imports (optionally with visible default)
             var bindingList = ts.mapDefined(decl.importClause.namedBindings.elements, function (b) { return resolver.isDeclarationVisible(b) ? b : undefined; });
             if ((bindingList && bindingList.length) || visibleDefaultBinding) {
-                return ts.updateImportDeclaration(decl, 
-                /*decorators*/ undefined, decl.modifiers, ts.updateImportClause(decl.importClause, visibleDefaultBinding, bindingList && bindingList.length ? ts.updateNamedImports(decl.importClause.namedBindings, bindingList) : undefined), rewriteModuleSpecifier(decl, decl.moduleSpecifier));
+                return ts.updateImportDeclaration(decl, undefined, decl.modifiers, ts.updateImportClause(decl.importClause, visibleDefaultBinding, bindingList && bindingList.length ? ts.updateNamedImports(decl.importClause.namedBindings, bindingList) : undefined), rewriteModuleSpecifier(decl, decl.moduleSpecifier));
             }
-            // Nothing visible
         }
         function transformAndReplaceLatePaintedStatements(statements) {
-            // This is a `while` loop because `handleSymbolAccessibilityError` can see additional import aliases marked as visible during
-            // error handling which must now be included in the output and themselves checked for errors.
-            // For example:
-            // ```
-            // module A {
-            //   export module Q {}
-            //   import B = Q;
-            //   import C = B;
-            //   export import D = C;
-            // }
-            // ```
-            // In such a scenario, only Q and D are initially visible, but we don't consider imports as private names - instead we say they if they are referenced they must
-            // be recorded. So while checking D's visibility we mark C as visible, then we must check C which in turn marks B, completing the chain of
-            // dependent imports and allowing a valid declaration file output. Today, this dependent alias marking only happens for internal import aliases.
             while (ts.length(lateMarkedStatements)) {
                 var i = lateMarkedStatements.shift();
                 if (!ts.isLateVisibilityPaintedStatement(i)) {
                     return ts.Debug.fail("Late replaced statement was found which is not handled by the declaration transformer!: " + (ts.SyntaxKind ? ts.SyntaxKind[i.kind] : i.kind));
                 }
-                var result = transformTopLevelDeclaration(i, /*privateDeclaration*/ true);
+                var result = transformTopLevelDeclaration(i, true);
                 lateStatementReplacementMap.set("" + ts.getOriginalNodeId(i), result);
             }
-            // And lastly, we need to get the final form of all those indetermine import declarations from before and add them to the output list
-            // (and remove them from the set to examine for outter declarations)
             return ts.visitNodes(statements, visitLateVisibilityMarkedStatements);
             function visitLateVisibilityMarkedStatements(statement) {
                 if (ts.isLateVisibilityPaintedStatement(statement)) {
@@ -75281,7 +60446,6 @@ var ts;
                         lateStatementReplacementMap.delete(key);
                         if (result && ts.isSourceFile(statement.parent)) {
                             if (ts.isArray(result) ? ts.some(result, needsScopeMarker) : needsScopeMarker(result)) {
-                                // Top-level declarations in .d.ts files are always considered exported even without a modifier unless there's an export assignment or specifier
                                 needsScopeFixMarker = true;
                             }
                             if (ts.isArray(result) ? ts.some(result, isExternalModuleIndicator) : isExternalModuleIndicator(result)) {
@@ -75295,11 +60459,10 @@ var ts;
             }
         }
         function isExternalModuleIndicator(result) {
-            // Exported top-level member indicates moduleness
-            return ts.isAnyImportOrReExport(result) || ts.isExportAssignment(result) || ts.hasModifier(result, 1 /* Export */);
+            return ts.isAnyImportOrReExport(result) || ts.isExportAssignment(result) || ts.hasModifier(result, 1);
         }
         function needsScopeMarker(result) {
-            return !ts.isAnyImportOrReExport(result) && !ts.isExportAssignment(result) && !ts.hasModifier(result, 1 /* Export */) && !ts.isAmbientModule(result);
+            return !ts.isAnyImportOrReExport(result) && !ts.isExportAssignment(result) && !ts.hasModifier(result, 1) && !ts.isAmbientModule(result);
         }
         function visitDeclarationSubtree(input) {
             if (shouldStripInternal(input))
@@ -75311,10 +60474,8 @@ var ts;
                     return;
                 }
             }
-            // Elide implementation signatures from overload sets
             if (ts.isFunctionLike(input) && resolver.isImplementationOfOverload(input))
                 return;
-            // Elide semicolon class statements
             if (ts.isSemicolonClassElement(input))
                 return;
             var previousEnclosingDeclaration;
@@ -75323,12 +60484,11 @@ var ts;
                 enclosingDeclaration = input;
             }
             var oldDiag = getSymbolAccessibilityDiagnostic;
-            // Emit methods which are private as properties with no type information
             if (ts.isMethodDeclaration(input) || ts.isMethodSignature(input)) {
-                if (ts.hasModifier(input, 8 /* Private */)) {
+                if (ts.hasModifier(input, 8)) {
                     if (input.symbol && input.symbol.declarations && input.symbol.declarations[0] !== input)
-                        return; // Elide all but the first overload
-                    return cleanup(ts.createProperty(/*decorators*/ undefined, ensureModifiers(input), input.name, /*questionToken*/ undefined, /*type*/ undefined, /*initializer*/ undefined));
+                        return;
+                    return cleanup(ts.createProperty(undefined, ensureModifiers(input), input.name, undefined, undefined, undefined));
                 }
             }
             var canProdiceDiagnostic = ts.canProduceDiagnostics(input);
@@ -75339,84 +60499,75 @@ var ts;
                 checkEntityNameVisibility(input.exprName, enclosingDeclaration);
             }
             var oldWithinObjectLiteralType = suppressNewDiagnosticContexts;
-            var shouldEnterSuppressNewDiagnosticsContextContext = ((input.kind === 166 /* TypeLiteral */ || input.kind === 177 /* MappedType */) && input.parent.kind !== 237 /* TypeAliasDeclaration */);
+            var shouldEnterSuppressNewDiagnosticsContextContext = ((input.kind === 166 || input.kind === 177) && input.parent.kind !== 237);
             if (shouldEnterSuppressNewDiagnosticsContextContext) {
-                // We stop making new diagnostic contexts within object literal types. Unless it's an object type on the RHS of a type alias declaration. Then we do.
                 suppressNewDiagnosticContexts = true;
             }
             if (isProcessedComponent(input)) {
                 switch (input.kind) {
-                    case 207 /* ExpressionWithTypeArguments */: {
+                    case 207: {
                         if ((ts.isEntityName(input.expression) || ts.isEntityNameExpression(input.expression))) {
                             checkEntityNameVisibility(input.expression, enclosingDeclaration);
                         }
                         var node = ts.visitEachChild(input, visitDeclarationSubtree, context);
                         return cleanup(ts.updateExpressionWithTypeArguments(node, ts.parenthesizeTypeParameters(node.typeArguments), node.expression));
                     }
-                    case 162 /* TypeReference */: {
+                    case 162: {
                         checkEntityNameVisibility(input.typeName, enclosingDeclaration);
                         var node = ts.visitEachChild(input, visitDeclarationSubtree, context);
                         return cleanup(ts.updateTypeReferenceNode(node, node.typeName, ts.parenthesizeTypeParameters(node.typeArguments)));
                     }
-                    case 159 /* ConstructSignature */:
+                    case 159:
                         return cleanup(ts.updateConstructSignature(input, ensureTypeParams(input, input.typeParameters), updateParamsList(input, input.parameters), ensureType(input, input.type)));
-                    case 155 /* Constructor */: {
-                        var isPrivate = ts.hasModifier(input, 8 /* Private */);
-                        // A constructor declaration may not have a type annotation
-                        var ctor = ts.createSignatureDeclaration(155 /* Constructor */, isPrivate ? undefined : ensureTypeParams(input, input.typeParameters), 
-                        // TODO: GH#18217
-                        isPrivate ? undefined : updateParamsList(input, input.parameters, 0 /* None */), 
-                        /*type*/ undefined);
+                    case 155: {
+                        var isPrivate = ts.hasModifier(input, 8);
+                        var ctor = ts.createSignatureDeclaration(155, isPrivate ? undefined : ensureTypeParams(input, input.typeParameters), isPrivate ? undefined : updateParamsList(input, input.parameters, 0), undefined);
                         ctor.modifiers = ts.createNodeArray(ensureModifiers(input));
                         return cleanup(ctor);
                     }
-                    case 154 /* MethodDeclaration */: {
-                        var sig = ts.createSignatureDeclaration(153 /* MethodSignature */, ensureTypeParams(input, input.typeParameters), updateParamsList(input, input.parameters), ensureType(input, input.type));
+                    case 154: {
+                        var sig = ts.createSignatureDeclaration(153, ensureTypeParams(input, input.typeParameters), updateParamsList(input, input.parameters), ensureType(input, input.type));
                         sig.name = input.name;
                         sig.modifiers = ts.createNodeArray(ensureModifiers(input));
                         sig.questionToken = input.questionToken;
                         return cleanup(sig);
                     }
-                    case 156 /* GetAccessor */: {
+                    case 156: {
                         var newNode = ensureAccessor(input);
                         return cleanup(newNode);
                     }
-                    case 157 /* SetAccessor */: {
+                    case 157: {
                         var newNode = ensureAccessor(input);
                         return cleanup(newNode);
                     }
-                    case 152 /* PropertyDeclaration */:
-                        return cleanup(ts.updateProperty(input, 
-                        /*decorators*/ undefined, ensureModifiers(input), input.name, input.questionToken, !ts.hasModifier(input, 8 /* Private */) ? ensureType(input, input.type) : undefined, ensureNoInitializer(input)));
-                    case 151 /* PropertySignature */:
-                        return cleanup(ts.updatePropertySignature(input, ensureModifiers(input), input.name, input.questionToken, !ts.hasModifier(input, 8 /* Private */) ? ensureType(input, input.type) : undefined, ensureNoInitializer(input)));
-                    case 153 /* MethodSignature */: {
+                    case 152:
+                        return cleanup(ts.updateProperty(input, undefined, ensureModifiers(input), input.name, input.questionToken, !ts.hasModifier(input, 8) ? ensureType(input, input.type) : undefined, ensureNoInitializer(input)));
+                    case 151:
+                        return cleanup(ts.updatePropertySignature(input, ensureModifiers(input), input.name, input.questionToken, !ts.hasModifier(input, 8) ? ensureType(input, input.type) : undefined, ensureNoInitializer(input)));
+                    case 153: {
                         return cleanup(ts.updateMethodSignature(input, ensureTypeParams(input, input.typeParameters), updateParamsList(input, input.parameters), ensureType(input, input.type), input.name, input.questionToken));
                     }
-                    case 158 /* CallSignature */: {
+                    case 158: {
                         return cleanup(ts.updateCallSignature(input, ensureTypeParams(input, input.typeParameters), updateParamsList(input, input.parameters), ensureType(input, input.type)));
                     }
-                    case 160 /* IndexSignature */: {
-                        return cleanup(ts.updateIndexSignature(input, 
-                        /*decorators*/ undefined, ensureModifiers(input), updateParamsList(input, input.parameters), ts.visitNode(input.type, visitDeclarationSubtree) || ts.createKeywordTypeNode(119 /* AnyKeyword */)));
+                    case 160: {
+                        return cleanup(ts.updateIndexSignature(input, undefined, ensureModifiers(input), updateParamsList(input, input.parameters), ts.visitNode(input.type, visitDeclarationSubtree) || ts.createKeywordTypeNode(119)));
                     }
-                    case 232 /* VariableDeclaration */: {
+                    case 232: {
                         if (ts.isBindingPattern(input.name)) {
                             return recreateBindingPattern(input.name);
                         }
                         shouldEnterSuppressNewDiagnosticsContextContext = true;
-                        suppressNewDiagnosticContexts = true; // Variable declaration types also suppress new diagnostic contexts, provided the contexts wouldn't be made for binding pattern types
+                        suppressNewDiagnosticContexts = true;
                         return cleanup(ts.updateVariableDeclaration(input, input.name, ensureType(input, input.type), ensureNoInitializer(input)));
                     }
-                    case 148 /* TypeParameter */: {
+                    case 148: {
                         if (isPrivateMethodTypeParameter(input) && (input.default || input.constraint)) {
-                            return cleanup(ts.updateTypeParameterDeclaration(input, input.name, /*constraint*/ undefined, /*defaultType*/ undefined));
+                            return cleanup(ts.updateTypeParameterDeclaration(input, input.name, undefined, undefined));
                         }
                         return cleanup(ts.visitEachChild(input, visitDeclarationSubtree, context));
                     }
-                    case 171 /* ConditionalType */: {
-                        // We have to process conditional types in a special way because for visibility purposes we need to push a new enclosingDeclaration
-                        // just for the `infer` types in the true branch. It's an implicit declaration scope that only applies to _part_ of the type.
+                    case 171: {
                         var checkType = ts.visitNode(input.checkType, visitDeclarationSubtree);
                         var extendsType = ts.visitNode(input.extendsType, visitDeclarationSubtree);
                         var oldEnclosingDecl = enclosingDeclaration;
@@ -75426,13 +60577,13 @@ var ts;
                         var falseType = ts.visitNode(input.falseType, visitDeclarationSubtree);
                         return cleanup(ts.updateConditionalTypeNode(input, checkType, extendsType, trueType, falseType));
                     }
-                    case 163 /* FunctionType */: {
+                    case 163: {
                         return cleanup(ts.updateFunctionTypeNode(input, ts.visitNodes(input.typeParameters, visitDeclarationSubtree), updateParamsList(input, input.parameters), ts.visitNode(input.type, visitDeclarationSubtree)));
                     }
-                    case 164 /* ConstructorType */: {
+                    case 164: {
                         return cleanup(ts.updateConstructorTypeNode(input, ts.visitNodes(input.typeParameters, visitDeclarationSubtree), updateParamsList(input, input.parameters), ts.visitNode(input.type, visitDeclarationSubtree)));
                     }
-                    case 179 /* ImportType */: {
+                    case 179: {
                         if (!ts.isLiteralImportTypeNode(input))
                             return cleanup(input);
                         return cleanup(ts.updateImportTypeNode(input, ts.updateLiteralTypeNode(input.argument, rewriteModuleSpecifier(input, input.argument.literal)), input.qualifier, ts.visitNodes(input.typeArguments, visitDeclarationSubtree, ts.isTypeNode), input.isTypeOf));
@@ -75461,32 +60612,28 @@ var ts;
             }
         }
         function isPrivateMethodTypeParameter(node) {
-            return node.parent.kind === 154 /* MethodDeclaration */ && ts.hasModifier(node.parent, 8 /* Private */);
+            return node.parent.kind === 154 && ts.hasModifier(node.parent, 8);
         }
         function visitDeclarationStatements(input) {
             if (!isPreservedDeclarationStatement(input)) {
-                // return undefined for unmatched kinds to omit them from the tree
                 return;
             }
             if (shouldStripInternal(input))
                 return;
             switch (input.kind) {
-                case 250 /* ExportDeclaration */: {
+                case 250: {
                     if (ts.isSourceFile(input.parent)) {
                         resultHasExternalModuleIndicator = true;
                         resultHasScopeMarker = true;
                     }
-                    // Always visible if the parent node isn't dropped for being not visible
-                    // Rewrite external module names if necessary
-                    return ts.updateExportDeclaration(input, /*decorators*/ undefined, input.modifiers, input.exportClause, rewriteModuleSpecifier(input, input.moduleSpecifier));
+                    return ts.updateExportDeclaration(input, undefined, input.modifiers, input.exportClause, rewriteModuleSpecifier(input, input.moduleSpecifier));
                 }
-                case 249 /* ExportAssignment */: {
-                    // Always visible if the parent node isn't dropped for being not visible
+                case 249: {
                     if (ts.isSourceFile(input.parent)) {
                         resultHasExternalModuleIndicator = true;
                         resultHasScopeMarker = true;
                     }
-                    if (input.expression.kind === 71 /* Identifier */) {
+                    if (input.expression.kind === 71) {
                         return input;
                     }
                     else {
@@ -75495,14 +60642,13 @@ var ts;
                             diagnosticMessage: ts.Diagnostics.Default_export_of_the_module_has_or_is_using_private_name_0,
                             errorNode: input
                         }); };
-                        var varDecl = ts.createVariableDeclaration(newId, resolver.createTypeOfExpression(input.expression, input, declarationEmitNodeBuilderFlags, symbolTracker), /*initializer*/ undefined);
-                        var statement = ts.createVariableStatement(needsDeclare ? [ts.createModifier(124 /* DeclareKeyword */)] : [], ts.createVariableDeclarationList([varDecl], 2 /* Const */));
+                        var varDecl = ts.createVariableDeclaration(newId, resolver.createTypeOfExpression(input.expression, input, declarationEmitNodeBuilderFlags, symbolTracker), undefined);
+                        var statement = ts.createVariableStatement(needsDeclare ? [ts.createModifier(124)] : [], ts.createVariableDeclarationList([varDecl], 2));
                         return [statement, ts.updateExportAssignment(input, input.decorators, input.modifiers, newId)];
                     }
                 }
             }
             var result = transformTopLevelDeclaration(input);
-            // Don't actually transform yet; just leave as original node - will be elided/swapped by late pass
             lateStatementReplacementMap.set("" + ts.getOriginalNodeId(input), result);
             return input;
         }
@@ -75510,16 +60656,15 @@ var ts;
             if (shouldStripInternal(input))
                 return;
             switch (input.kind) {
-                case 243 /* ImportEqualsDeclaration */: {
+                case 243: {
                     return transformImportEqualsDeclaration(input);
                 }
-                case 244 /* ImportDeclaration */: {
+                case 244: {
                     return transformImportDeclaration(input);
                 }
             }
             if (ts.isDeclaration(input) && isDeclarationAndNotVisible(input))
                 return;
-            // Elide implementation signatures from overload sets
             if (ts.isFunctionLike(input) && resolver.isImplementationOfOverload(input))
                 return;
             var previousEnclosingDeclaration;
@@ -75534,45 +60679,36 @@ var ts;
             }
             var previousNeedsDeclare = needsDeclare;
             switch (input.kind) {
-                case 237 /* TypeAliasDeclaration */: // Type aliases get `declare`d if need be (for legacy support), but that's all
-                    return cleanup(ts.updateTypeAliasDeclaration(input, 
-                    /*decorators*/ undefined, ensureModifiers(input, isPrivate), input.name, ts.visitNodes(input.typeParameters, visitDeclarationSubtree, ts.isTypeParameterDeclaration), ts.visitNode(input.type, visitDeclarationSubtree, ts.isTypeNode)));
-                case 236 /* InterfaceDeclaration */: {
-                    return cleanup(ts.updateInterfaceDeclaration(input, 
-                    /*decorators*/ undefined, ensureModifiers(input, isPrivate), input.name, ensureTypeParams(input, input.typeParameters), transformHeritageClauses(input.heritageClauses), ts.visitNodes(input.members, visitDeclarationSubtree)));
-                }
-                case 234 /* FunctionDeclaration */: {
-                    // Generators lose their generator-ness, excepting their return type
-                    return cleanup(ts.updateFunctionDeclaration(input, 
-                    /*decorators*/ undefined, ensureModifiers(input, isPrivate), 
-                    /*asteriskToken*/ undefined, input.name, ensureTypeParams(input, input.typeParameters), updateParamsList(input, input.parameters), ensureType(input, input.type), 
-                    /*body*/ undefined));
-                }
-                case 239 /* ModuleDeclaration */: {
+                case 237:
+                    return cleanup(ts.updateTypeAliasDeclaration(input, undefined, ensureModifiers(input, isPrivate), input.name, ts.visitNodes(input.typeParameters, visitDeclarationSubtree, ts.isTypeParameterDeclaration), ts.visitNode(input.type, visitDeclarationSubtree, ts.isTypeNode)));
+                case 236: {
+                    return cleanup(ts.updateInterfaceDeclaration(input, undefined, ensureModifiers(input, isPrivate), input.name, ensureTypeParams(input, input.typeParameters), transformHeritageClauses(input.heritageClauses), ts.visitNodes(input.members, visitDeclarationSubtree)));
+                }
+                case 234: {
+                    return cleanup(ts.updateFunctionDeclaration(input, undefined, ensureModifiers(input, isPrivate), undefined, input.name, ensureTypeParams(input, input.typeParameters), updateParamsList(input, input.parameters), ensureType(input, input.type), undefined));
+                }
+                case 239: {
                     needsDeclare = false;
                     var inner = input.body;
-                    if (inner && inner.kind === 240 /* ModuleBlock */) {
+                    if (inner && inner.kind === 240) {
                         var statements = ts.visitNodes(inner.statements, visitDeclarationStatements);
                         var body = ts.updateModuleBlock(inner, transformAndReplaceLatePaintedStatements(statements));
                         needsDeclare = previousNeedsDeclare;
                         var mods = ensureModifiers(input, isPrivate);
-                        return cleanup(ts.updateModuleDeclaration(input, 
-                        /*decorators*/ undefined, mods, ts.isExternalModuleAugmentation(input) ? rewriteModuleSpecifier(input, input.name) : input.name, body));
+                        return cleanup(ts.updateModuleDeclaration(input, undefined, mods, ts.isExternalModuleAugmentation(input) ? rewriteModuleSpecifier(input, input.name) : input.name, body));
                     }
                     else {
                         needsDeclare = previousNeedsDeclare;
                         var mods = ensureModifiers(input, isPrivate);
                         needsDeclare = false;
                         ts.visitNode(inner, visitDeclarationStatements);
-                        // eagerly transform nested namespaces (the nesting doesn't need any elision or painting done)
-                        var id = "" + ts.getOriginalNodeId(inner); // TODO: GH#18217
+                        var id = "" + ts.getOriginalNodeId(inner);
                         var body = lateStatementReplacementMap.get(id);
                         lateStatementReplacementMap.delete(id);
-                        return cleanup(ts.updateModuleDeclaration(input, 
-                        /*decorators*/ undefined, mods, input.name, body));
+                        return cleanup(ts.updateModuleDeclaration(input, undefined, mods, input.name, body));
                     }
                 }
-                case 235 /* ClassDeclaration */: {
+                case 235: {
                     var modifiers = ts.createNodeArray(ensureModifiers(input, isPrivate));
                     var typeParameters = ensureTypeParams(input, input.typeParameters);
                     var ctor = ts.getFirstConstructorWithBody(input);
@@ -75580,15 +60716,13 @@ var ts;
                     if (ctor) {
                         var oldDiag_1 = getSymbolAccessibilityDiagnostic;
                         parameterProperties = ts.compact(ts.flatMap(ctor.parameters, function (param) {
-                            if (!ts.hasModifier(param, 92 /* ParameterPropertyModifier */))
+                            if (!ts.hasModifier(param, 92))
                                 return;
                             getSymbolAccessibilityDiagnostic = ts.createGetSymbolAccessibilityDiagnosticForNode(param);
-                            if (param.name.kind === 71 /* Identifier */) {
-                                return preserveJsDoc(ts.createProperty(
-                                /*decorators*/ undefined, ensureModifiers(param), param.name, param.questionToken, ensureType(param, param.type), ensureNoInitializer(param)), param);
+                            if (param.name.kind === 71) {
+                                return preserveJsDoc(ts.createProperty(undefined, ensureModifiers(param), param.name, param.questionToken, ensureType(param, param.type), ensureNoInitializer(param)), param);
                             }
                             else {
-                                // Pattern - this is currently an error, but we emit declarations for it somewhat correctly
                                 return walkBindingPattern(param.name);
                             }
                             function walkBindingPattern(pattern) {
@@ -75601,10 +60735,7 @@ var ts;
                                         elems = ts.concatenate(elems, walkBindingPattern(elem.name));
                                     }
                                     elems = elems || [];
-                                    elems.push(ts.createProperty(
-                                    /*decorators*/ undefined, ensureModifiers(param), elem.name, 
-                                    /*questionToken*/ undefined, ensureType(elem, /*type*/ undefined), 
-                                    /*initializer*/ undefined));
+                                    elems.push(ts.createProperty(undefined, ensureModifiers(param), elem.name, undefined, ensureType(elem, undefined), undefined));
                                 }
                                 return elems;
                             }
@@ -75613,49 +60744,44 @@ var ts;
                     }
                     var members = ts.createNodeArray(ts.concatenate(parameterProperties, ts.visitNodes(input.members, visitDeclarationSubtree)));
                     var extendsClause_1 = ts.getClassExtendsHeritageClauseElement(input);
-                    if (extendsClause_1 && !ts.isEntityNameExpression(extendsClause_1.expression) && extendsClause_1.expression.kind !== 95 /* NullKeyword */) {
-                        // We must add a temporary declaration for the extends clause expression
-                        var newId_1 = ts.createOptimisticUniqueName(ts.unescapeLeadingUnderscores(input.name.escapedText) + "_base"); // TODO: GH#18217
+                    if (extendsClause_1 && !ts.isEntityNameExpression(extendsClause_1.expression) && extendsClause_1.expression.kind !== 95) {
+                        var newId_1 = ts.createOptimisticUniqueName(ts.unescapeLeadingUnderscores(input.name.escapedText) + "_base");
                         getSymbolAccessibilityDiagnostic = function () { return ({
                             diagnosticMessage: ts.Diagnostics.extends_clause_of_exported_class_0_has_or_is_using_private_name_1,
                             errorNode: extendsClause_1,
                             typeName: input.name
                         }); };
-                        var varDecl = ts.createVariableDeclaration(newId_1, resolver.createTypeOfExpression(extendsClause_1.expression, input, declarationEmitNodeBuilderFlags, symbolTracker), /*initializer*/ undefined);
-                        var statement = ts.createVariableStatement(needsDeclare ? [ts.createModifier(124 /* DeclareKeyword */)] : [], ts.createVariableDeclarationList([varDecl], 2 /* Const */));
+                        var varDecl = ts.createVariableDeclaration(newId_1, resolver.createTypeOfExpression(extendsClause_1.expression, input, declarationEmitNodeBuilderFlags, symbolTracker), undefined);
+                        var statement = ts.createVariableStatement(needsDeclare ? [ts.createModifier(124)] : [], ts.createVariableDeclarationList([varDecl], 2));
                         var heritageClauses = ts.createNodeArray(ts.map(input.heritageClauses, function (clause) {
-                            if (clause.token === 85 /* ExtendsKeyword */) {
+                            if (clause.token === 85) {
                                 var oldDiag_2 = getSymbolAccessibilityDiagnostic;
                                 getSymbolAccessibilityDiagnostic = ts.createGetSymbolAccessibilityDiagnosticForNode(clause.types[0]);
                                 var newClause = ts.updateHeritageClause(clause, ts.map(clause.types, function (t) { return ts.updateExpressionWithTypeArguments(t, ts.visitNodes(t.typeArguments, visitDeclarationSubtree), newId_1); }));
                                 getSymbolAccessibilityDiagnostic = oldDiag_2;
                                 return newClause;
                             }
-                            return ts.updateHeritageClause(clause, ts.visitNodes(ts.createNodeArray(ts.filter(clause.types, function (t) { return ts.isEntityNameExpression(t.expression) || t.expression.kind === 95 /* NullKeyword */; })), visitDeclarationSubtree));
+                            return ts.updateHeritageClause(clause, ts.visitNodes(ts.createNodeArray(ts.filter(clause.types, function (t) { return ts.isEntityNameExpression(t.expression) || t.expression.kind === 95; })), visitDeclarationSubtree));
                         }));
-                        return [statement, cleanup(ts.updateClassDeclaration(input, 
-                            /*decorators*/ undefined, modifiers, input.name, typeParameters, heritageClauses, members))]; // TODO: GH#18217
+                        return [statement, cleanup(ts.updateClassDeclaration(input, undefined, modifiers, input.name, typeParameters, heritageClauses, members))];
                     }
                     else {
                         var heritageClauses = transformHeritageClauses(input.heritageClauses);
-                        return cleanup(ts.updateClassDeclaration(input, 
-                        /*decorators*/ undefined, modifiers, input.name, typeParameters, heritageClauses, members));
+                        return cleanup(ts.updateClassDeclaration(input, undefined, modifiers, input.name, typeParameters, heritageClauses, members));
                     }
                 }
-                case 214 /* VariableStatement */: {
+                case 214: {
                     return cleanup(transformVariableStatement(input, isPrivate));
                 }
-                case 238 /* EnumDeclaration */: {
-                    return cleanup(ts.updateEnumDeclaration(input, /*decorators*/ undefined, ts.createNodeArray(ensureModifiers(input, isPrivate)), input.name, ts.createNodeArray(ts.mapDefined(input.members, function (m) {
+                case 238: {
+                    return cleanup(ts.updateEnumDeclaration(input, undefined, ts.createNodeArray(ensureModifiers(input, isPrivate)), input.name, ts.createNodeArray(ts.mapDefined(input.members, function (m) {
                         if (shouldStripInternal(m))
                             return;
-                        // Rewrite enum values to their constants, if available
                         var constValue = resolver.getConstantValue(m);
                         return preserveJsDoc(ts.updateEnumMember(m, m.name, constValue !== undefined ? ts.createLiteral(constValue) : undefined), m);
                     }))));
                 }
             }
-            // Anything left unhandled is an error, so this should be unreachable
             return ts.Debug.assertNever(input, "Unhandled top-level node in declaration emit: " + ts.SyntaxKind[input.kind]);
             function cleanup(node) {
                 if (isEnclosingDeclaration(input)) {
@@ -75664,7 +60790,7 @@ var ts;
                 if (canProdiceDiagnostic) {
                     getSymbolAccessibilityDiagnostic = oldDiag;
                 }
-                if (input.kind === 239 /* ModuleDeclaration */) {
+                if (input.kind === 239) {
                     needsDeclare = previousNeedsDeclare;
                 }
                 if (node === input) {
@@ -75685,7 +60811,7 @@ var ts;
             return ts.flatten(ts.mapDefined(d.elements, function (e) { return recreateBindingElement(e); }));
         }
         function recreateBindingElement(e) {
-            if (e.kind === 206 /* OmittedExpression */) {
+            if (e.kind === 206) {
                 return;
             }
             if (e.name) {
@@ -75695,7 +60821,7 @@ var ts;
                     return recreateBindingPattern(e.name);
                 }
                 else {
-                    return ts.createVariableDeclaration(e.name, ensureType(e, /*type*/ undefined), /*initializer*/ undefined);
+                    return ts.createVariableDeclaration(e.name, ensureType(e, undefined), undefined);
                 }
             }
         }
@@ -75706,7 +60832,7 @@ var ts;
                 getSymbolAccessibilityDiagnostic = ts.createGetSymbolAccessibilityDiagnosticForNodeName(node);
             }
             errorNameNode = node.name;
-            ts.Debug.assert(resolver.isLateBound(ts.getParseTreeNode(node))); // Should only be called with dynamic names
+            ts.Debug.assert(resolver.isLateBound(ts.getParseTreeNode(node)));
             var decl = node;
             var entityName = decl.name.expression;
             checkEntityNameVisibility(entityName, enclosingDeclaration);
@@ -75737,12 +60863,12 @@ var ts;
             return ts.createModifiersFromModifierFlags(newFlags);
         }
         function ensureModifierFlags(node, privateDeclaration) {
-            var mask = 3071 /* All */ ^ (4 /* Public */ | 256 /* Async */); // No async modifiers in declaration files
-            var additions = (needsDeclare && !isAlwaysType(node)) ? 2 /* Ambient */ : 0 /* None */;
-            var parentIsFile = node.parent.kind === 274 /* SourceFile */;
+            var mask = 3071 ^ (4 | 256);
+            var additions = (needsDeclare && !isAlwaysType(node)) ? 2 : 0;
+            var parentIsFile = node.parent.kind === 274;
             if (!parentIsFile || (isBundledEmit && parentIsFile && ts.isExternalModule(node.parent))) {
-                mask ^= ((privateDeclaration || (isBundledEmit && parentIsFile) ? 0 : 1 /* Export */) | 512 /* Default */ | 2 /* Ambient */);
-                additions = 0 /* None */;
+                mask ^= ((privateDeclaration || (isBundledEmit && parentIsFile) ? 0 : 1) | 512 | 2);
+                additions = 0;
             }
             return maskModifierFlags(node, mask, additions);
         }
@@ -75754,14 +60880,13 @@ var ts;
             var accessorType = getTypeAnnotationFromAccessor(node);
             if (!accessorType && accessors.secondAccessor) {
                 accessorType = getTypeAnnotationFromAccessor(accessors.secondAccessor);
-                // If we end up pulling the type from the second accessor, we also need to change the diagnostic context to get the expected error message
                 getSymbolAccessibilityDiagnostic = ts.createGetSymbolAccessibilityDiagnosticForNode(accessors.secondAccessor);
             }
-            var prop = ts.createProperty(/*decorators*/ undefined, maskModifiers(node, /*mask*/ undefined, (!accessors.setAccessor) ? 64 /* Readonly */ : 0 /* None */), node.name, node.questionToken, ensureType(node, accessorType), /*initializer*/ undefined);
+            var prop = ts.createProperty(undefined, maskModifiers(node, undefined, (!accessors.setAccessor) ? 64 : 0), node.name, node.questionToken, ensureType(node, accessorType), undefined);
             var leadingsSyntheticCommentRanges = accessors.secondAccessor && ts.getLeadingCommentRangesOfNode(accessors.secondAccessor, currentSourceFile);
             if (leadingsSyntheticCommentRanges) {
-                var _loop_7 = function (range) {
-                    if (range.kind === 3 /* MultiLineCommentTrivia */) {
+                var _loop_10 = function (range) {
+                    if (range.kind === 3) {
                         var text = currentSourceFile.text.slice(range.pos + 2, range.end - 2);
                         var lines = text.split(/\r\n?|\n/g);
                         if (lines.length > 1) {
@@ -75774,99 +60899,97 @@ var ts;
                 };
                 for (var _i = 0, leadingsSyntheticCommentRanges_1 = leadingsSyntheticCommentRanges; _i < leadingsSyntheticCommentRanges_1.length; _i++) {
                     var range = leadingsSyntheticCommentRanges_1[_i];
-                    _loop_7(range);
+                    _loop_10(range);
                 }
             }
             return prop;
         }
         function transformHeritageClauses(nodes) {
             return ts.createNodeArray(ts.filter(ts.map(nodes, function (clause) { return ts.updateHeritageClause(clause, ts.visitNodes(ts.createNodeArray(ts.filter(clause.types, function (t) {
-                return ts.isEntityNameExpression(t.expression) || (clause.token === 85 /* ExtendsKeyword */ && t.expression.kind === 95 /* NullKeyword */);
+                return ts.isEntityNameExpression(t.expression) || (clause.token === 85 && t.expression.kind === 95);
             })), visitDeclarationSubtree)); }), function (clause) { return clause.types && !!clause.types.length; }));
         }
     }
     ts.transformDeclarations = transformDeclarations;
     function isAlwaysType(node) {
-        if (node.kind === 236 /* InterfaceDeclaration */) {
+        if (node.kind === 236) {
             return true;
         }
         return false;
     }
-    // Elide "public" modifier, as it is the default
     function maskModifiers(node, modifierMask, modifierAdditions) {
         return ts.createModifiersFromModifierFlags(maskModifierFlags(node, modifierMask, modifierAdditions));
     }
     function maskModifierFlags(node, modifierMask, modifierAdditions) {
-        if (modifierMask === void 0) { modifierMask = 3071 /* All */ ^ 4 /* Public */; }
-        if (modifierAdditions === void 0) { modifierAdditions = 0 /* None */; }
+        if (modifierMask === void 0) { modifierMask = 3071 ^ 4; }
+        if (modifierAdditions === void 0) { modifierAdditions = 0; }
         var flags = (ts.getModifierFlags(node) & modifierMask) | modifierAdditions;
-        if (flags & 512 /* Default */ && flags & 2 /* Ambient */) {
-            flags ^= 2 /* Ambient */; // `declare` is never required alongside `default` (and would be an error if printed)
+        if (flags & 512 && flags & 2) {
+            flags ^= 2;
         }
         return flags;
     }
     function getTypeAnnotationFromAccessor(accessor) {
         if (accessor) {
-            return accessor.kind === 156 /* GetAccessor */
-                ? accessor.type // Getter - return type
+            return accessor.kind === 156
+                ? accessor.type
                 : accessor.parameters.length > 0
-                    ? accessor.parameters[0].type // Setter parameter type
+                    ? accessor.parameters[0].type
                     : undefined;
         }
     }
     function canHaveLiteralInitializer(node) {
         switch (node.kind) {
-            case 232 /* VariableDeclaration */:
-            case 152 /* PropertyDeclaration */:
-            case 151 /* PropertySignature */:
-            case 149 /* Parameter */:
+            case 232:
+            case 152:
+            case 151:
+            case 149:
                 return true;
         }
         return false;
     }
     function isPreservedDeclarationStatement(node) {
         switch (node.kind) {
-            case 234 /* FunctionDeclaration */:
-            case 239 /* ModuleDeclaration */:
-            case 243 /* ImportEqualsDeclaration */:
-            case 236 /* InterfaceDeclaration */:
-            case 235 /* ClassDeclaration */:
-            case 237 /* TypeAliasDeclaration */:
-            case 238 /* EnumDeclaration */:
-            case 214 /* VariableStatement */:
-            case 244 /* ImportDeclaration */:
-            case 250 /* ExportDeclaration */:
-            case 249 /* ExportAssignment */:
+            case 234:
+            case 239:
+            case 243:
+            case 236:
+            case 235:
+            case 237:
+            case 238:
+            case 214:
+            case 244:
+            case 250:
+            case 249:
                 return true;
         }
         return false;
     }
     function isProcessedComponent(node) {
         switch (node.kind) {
-            case 159 /* ConstructSignature */:
-            case 155 /* Constructor */:
-            case 154 /* MethodDeclaration */:
-            case 156 /* GetAccessor */:
-            case 157 /* SetAccessor */:
-            case 152 /* PropertyDeclaration */:
-            case 151 /* PropertySignature */:
-            case 153 /* MethodSignature */:
-            case 158 /* CallSignature */:
-            case 160 /* IndexSignature */:
-            case 232 /* VariableDeclaration */:
-            case 148 /* TypeParameter */:
-            case 207 /* ExpressionWithTypeArguments */:
-            case 162 /* TypeReference */:
-            case 171 /* ConditionalType */:
-            case 163 /* FunctionType */:
-            case 164 /* ConstructorType */:
-            case 179 /* ImportType */:
+            case 159:
+            case 155:
+            case 154:
+            case 156:
+            case 157:
+            case 152:
+            case 151:
+            case 153:
+            case 158:
+            case 160:
+            case 232:
+            case 148:
+            case 207:
+            case 162:
+            case 171:
+            case 163:
+            case 164:
+            case 179:
                 return true;
         }
         return false;
     }
 })(ts || (ts = {}));
-/* @internal */
 var ts;
 (function (ts) {
     function getModuleTransformer(moduleKind) {
@@ -75880,18 +61003,6 @@ var ts;
                 return ts.transformModule;
         }
     }
-    var TransformationState;
-    (function (TransformationState) {
-        TransformationState[TransformationState["Uninitialized"] = 0] = "Uninitialized";
-        TransformationState[TransformationState["Initialized"] = 1] = "Initialized";
-        TransformationState[TransformationState["Completed"] = 2] = "Completed";
-        TransformationState[TransformationState["Disposed"] = 3] = "Disposed";
-    })(TransformationState || (TransformationState = {}));
-    var SyntaxKindFeatureFlags;
-    (function (SyntaxKindFeatureFlags) {
-        SyntaxKindFeatureFlags[SyntaxKindFeatureFlags["Substitution"] = 1] = "Substitution";
-        SyntaxKindFeatureFlags[SyntaxKindFeatureFlags["EmitNotifications"] = 2] = "EmitNotifications";
-    })(SyntaxKindFeatureFlags || (SyntaxKindFeatureFlags = {}));
     function getTransformers(compilerOptions, customTransformers) {
         var jsx = compilerOptions.jsx;
         var languageVersion = ts.getEmitScriptTarget(compilerOptions);
@@ -75899,44 +61010,32 @@ var ts;
         var transformers = [];
         ts.addRange(transformers, customTransformers && customTransformers.before);
         transformers.push(ts.transformTypeScript);
-        if (jsx === 2 /* React */) {
+        if (jsx === 2) {
             transformers.push(ts.transformJsx);
         }
-        if (languageVersion < 6 /* ESNext */) {
+        if (languageVersion < 6) {
             transformers.push(ts.transformESNext);
         }
-        if (languageVersion < 4 /* ES2017 */) {
+        if (languageVersion < 4) {
             transformers.push(ts.transformES2017);
         }
-        if (languageVersion < 3 /* ES2016 */) {
+        if (languageVersion < 3) {
             transformers.push(ts.transformES2016);
         }
-        if (languageVersion < 2 /* ES2015 */) {
+        if (languageVersion < 2) {
             transformers.push(ts.transformES2015);
             transformers.push(ts.transformGenerators);
         }
         transformers.push(getModuleTransformer(moduleKind));
-        // The ES5 transformer is last so that it can substitute expressions like `exports.default`
-        // for ES3.
-        if (languageVersion < 1 /* ES5 */) {
+        if (languageVersion < 1) {
             transformers.push(ts.transformES5);
         }
         ts.addRange(transformers, customTransformers && customTransformers.after);
         return transformers;
     }
     ts.getTransformers = getTransformers;
-    /**
-     * Transforms an array of SourceFiles by passing them through each transformer.
-     *
-     * @param resolver The emit resolver provided by the checker.
-     * @param host The emit host object used to interact with the file system.
-     * @param options Compiler options to surface in the `TransformationContext`.
-     * @param nodes An array of nodes to transform.
-     * @param transforms An array of `TransformerFactory` callbacks.
-     * @param allowDtsFiles A value indicating whether to allow the transformation of .d.ts files.
-     */
     function transformNodes(resolver, host, options, nodes, transformers, allowDtsFiles) {
-        var enabledSyntaxKindFeatures = new Array(305 /* Count */);
+        var enabledSyntaxKindFeatures = new Array(305);
         var lexicalEnvironmentVariableDeclarations;
         var lexicalEnvironmentFunctionDeclarations;
         var lexicalEnvironmentVariableDeclarationsStack = [];
@@ -75946,10 +61045,8 @@ var ts;
         var emitHelpers;
         var onSubstituteNode = function (_, node) { return node; };
         var onEmitNode = function (hint, node, callback) { return callback(hint, node); };
-        var state = 0 /* Uninitialized */;
+        var state = 0;
         var diagnostics = [];
-        // The transformation context is provided to each transformer as part of transformer
-        // initialization.
         var context = {
             getCompilerOptions: function () { return options; },
             getEmitResolver: function () { return resolver; },
@@ -75968,13 +61065,13 @@ var ts;
             isEmitNotificationEnabled: isEmitNotificationEnabled,
             get onSubstituteNode() { return onSubstituteNode; },
             set onSubstituteNode(value) {
-                ts.Debug.assert(state < 1 /* Initialized */, "Cannot modify transformation hooks after initialization has completed.");
+                ts.Debug.assert(state < 1, "Cannot modify transformation hooks after initialization has completed.");
                 ts.Debug.assert(value !== undefined, "Value must not be 'undefined'");
                 onSubstituteNode = value;
             },
             get onEmitNode() { return onEmitNode; },
             set onEmitNode(value) {
-                ts.Debug.assert(state < 1 /* Initialized */, "Cannot modify transformation hooks after initialization has completed.");
+                ts.Debug.assert(state < 1, "Cannot modify transformation hooks after initialization has completed.");
                 ts.Debug.assert(value !== undefined, "Value must not be 'undefined'");
                 onEmitNode = value;
             },
@@ -75982,20 +61079,15 @@ var ts;
                 diagnostics.push(diag);
             }
         };
-        // Ensure the parse tree is clean before applying transformations
-        for (var _i = 0, nodes_3 = nodes; _i < nodes_3.length; _i++) {
-            var node = nodes_3[_i];
+        for (var _i = 0, nodes_4 = nodes; _i < nodes_4.length; _i++) {
+            var node = nodes_4[_i];
             ts.disposeEmitNodes(ts.getSourceFileOfNode(ts.getParseTreeNode(node)));
         }
         ts.performance.mark("beforeTransform");
-        // Chain together and initialize each transformer.
         var transformation = ts.chain.apply(void 0, transformers)(context);
-        // prevent modification of transformation hooks.
-        state = 1 /* Initialized */;
-        // Transform each node.
+        state = 1;
         var transformed = ts.map(nodes, allowDtsFiles ? transformation : transformRoot);
-        // prevent modification of the lexical environment.
-        state = 2 /* Completed */;
+        state = 2;
         ts.performance.mark("afterTransform");
         ts.performance.measure("transformTime", "beforeTransform", "afterTransform");
         return {
@@ -76008,55 +61100,28 @@ var ts;
         function transformRoot(node) {
             return node && (!ts.isSourceFile(node) || !node.isDeclarationFile) ? transformation(node) : node;
         }
-        /**
-         * Enables expression substitutions in the pretty printer for the provided SyntaxKind.
-         */
         function enableSubstitution(kind) {
-            ts.Debug.assert(state < 2 /* Completed */, "Cannot modify the transformation context after transformation has completed.");
-            enabledSyntaxKindFeatures[kind] |= 1 /* Substitution */;
+            ts.Debug.assert(state < 2, "Cannot modify the transformation context after transformation has completed.");
+            enabledSyntaxKindFeatures[kind] |= 1;
         }
-        /**
-         * Determines whether expression substitutions are enabled for the provided node.
-         */
         function isSubstitutionEnabled(node) {
-            return (enabledSyntaxKindFeatures[node.kind] & 1 /* Substitution */) !== 0
-                && (ts.getEmitFlags(node) & 4 /* NoSubstitution */) === 0;
-        }
-        /**
-         * Emits a node with possible substitution.
-         *
-         * @param hint A hint as to the intended usage of the node.
-         * @param node The node to emit.
-         * @param emitCallback The callback used to emit the node or its substitute.
-         */
+            return (enabledSyntaxKindFeatures[node.kind] & 1) !== 0
+                && (ts.getEmitFlags(node) & 4) === 0;
+        }
         function substituteNode(hint, node) {
-            ts.Debug.assert(state < 3 /* Disposed */, "Cannot substitute a node after the result is disposed.");
+            ts.Debug.assert(state < 3, "Cannot substitute a node after the result is disposed.");
             return node && isSubstitutionEnabled(node) && onSubstituteNode(hint, node) || node;
         }
-        /**
-         * Enables before/after emit notifications in the pretty printer for the provided SyntaxKind.
-         */
         function enableEmitNotification(kind) {
-            ts.Debug.assert(state < 2 /* Completed */, "Cannot modify the transformation context after transformation has completed.");
-            enabledSyntaxKindFeatures[kind] |= 2 /* EmitNotifications */;
+            ts.Debug.assert(state < 2, "Cannot modify the transformation context after transformation has completed.");
+            enabledSyntaxKindFeatures[kind] |= 2;
         }
-        /**
-         * Determines whether before/after emit notifications should be raised in the pretty
-         * printer when it emits a node.
-         */
         function isEmitNotificationEnabled(node) {
-            return (enabledSyntaxKindFeatures[node.kind] & 2 /* EmitNotifications */) !== 0
-                || (ts.getEmitFlags(node) & 2 /* AdviseOnEmitNode */) !== 0;
-        }
-        /**
-         * Emits a node with possible emit notification.
-         *
-         * @param hint A hint as to the intended usage of the node.
-         * @param node The node to emit.
-         * @param emitCallback The callback used to emit the node.
-         */
+            return (enabledSyntaxKindFeatures[node.kind] & 2) !== 0
+                || (ts.getEmitFlags(node) & 2) !== 0;
+        }
         function emitNodeWithNotification(hint, node, emitCallback) {
-            ts.Debug.assert(state < 3 /* Disposed */, "Cannot invoke TransformationResult callbacks after the result is disposed.");
+            ts.Debug.assert(state < 3, "Cannot invoke TransformationResult callbacks after the result is disposed.");
             if (node) {
                 if (isEmitNotificationEnabled(node)) {
                     onEmitNode(hint, node, emitCallback);
@@ -76066,13 +61131,10 @@ var ts;
                 }
             }
         }
-        /**
-         * Records a hoisted variable declaration for the provided name within a lexical environment.
-         */
         function hoistVariableDeclaration(name) {
-            ts.Debug.assert(state > 0 /* Uninitialized */, "Cannot modify the lexical environment during initialization.");
-            ts.Debug.assert(state < 2 /* Completed */, "Cannot modify the lexical environment after transformation has completed.");
-            var decl = ts.setEmitFlags(ts.createVariableDeclaration(name), 64 /* NoNestedSourceMaps */);
+            ts.Debug.assert(state > 0, "Cannot modify the lexical environment during initialization.");
+            ts.Debug.assert(state < 2, "Cannot modify the lexical environment after transformation has completed.");
+            var decl = ts.setEmitFlags(ts.createVariableDeclaration(name), 64);
             if (!lexicalEnvironmentVariableDeclarations) {
                 lexicalEnvironmentVariableDeclarations = [decl];
             }
@@ -76080,12 +61142,9 @@ var ts;
                 lexicalEnvironmentVariableDeclarations.push(decl);
             }
         }
-        /**
-         * Records a hoisted function declaration within a lexical environment.
-         */
         function hoistFunctionDeclaration(func) {
-            ts.Debug.assert(state > 0 /* Uninitialized */, "Cannot modify the lexical environment during initialization.");
-            ts.Debug.assert(state < 2 /* Completed */, "Cannot modify the lexical environment after transformation has completed.");
+            ts.Debug.assert(state > 0, "Cannot modify the lexical environment during initialization.");
+            ts.Debug.assert(state < 2, "Cannot modify the lexical environment after transformation has completed.");
             if (!lexicalEnvironmentFunctionDeclarations) {
                 lexicalEnvironmentFunctionDeclarations = [func];
             }
@@ -76093,45 +61152,31 @@ var ts;
                 lexicalEnvironmentFunctionDeclarations.push(func);
             }
         }
-        /**
-         * Starts a new lexical environment. Any existing hoisted variable or function declarations
-         * are pushed onto a stack, and the related storage variables are reset.
-         */
         function startLexicalEnvironment() {
-            ts.Debug.assert(state > 0 /* Uninitialized */, "Cannot modify the lexical environment during initialization.");
-            ts.Debug.assert(state < 2 /* Completed */, "Cannot modify the lexical environment after transformation has completed.");
+            ts.Debug.assert(state > 0, "Cannot modify the lexical environment during initialization.");
+            ts.Debug.assert(state < 2, "Cannot modify the lexical environment after transformation has completed.");
             ts.Debug.assert(!lexicalEnvironmentSuspended, "Lexical environment is suspended.");
-            // Save the current lexical environment. Rather than resizing the array we adjust the
-            // stack size variable. This allows us to reuse existing array slots we've
-            // already allocated between transformations to avoid allocation and GC overhead during
-            // transformation.
             lexicalEnvironmentVariableDeclarationsStack[lexicalEnvironmentStackOffset] = lexicalEnvironmentVariableDeclarations;
             lexicalEnvironmentFunctionDeclarationsStack[lexicalEnvironmentStackOffset] = lexicalEnvironmentFunctionDeclarations;
             lexicalEnvironmentStackOffset++;
             lexicalEnvironmentVariableDeclarations = undefined;
             lexicalEnvironmentFunctionDeclarations = undefined;
         }
-        /** Suspends the current lexical environment, usually after visiting a parameter list. */
         function suspendLexicalEnvironment() {
-            ts.Debug.assert(state > 0 /* Uninitialized */, "Cannot modify the lexical environment during initialization.");
-            ts.Debug.assert(state < 2 /* Completed */, "Cannot modify the lexical environment after transformation has completed.");
+            ts.Debug.assert(state > 0, "Cannot modify the lexical environment during initialization.");
+            ts.Debug.assert(state < 2, "Cannot modify the lexical environment after transformation has completed.");
             ts.Debug.assert(!lexicalEnvironmentSuspended, "Lexical environment is already suspended.");
             lexicalEnvironmentSuspended = true;
         }
-        /** Resumes a suspended lexical environment, usually before visiting a function body. */
         function resumeLexicalEnvironment() {
-            ts.Debug.assert(state > 0 /* Uninitialized */, "Cannot modify the lexical environment during initialization.");
-            ts.Debug.assert(state < 2 /* Completed */, "Cannot modify the lexical environment after transformation has completed.");
+            ts.Debug.assert(state > 0, "Cannot modify the lexical environment during initialization.");
+            ts.Debug.assert(state < 2, "Cannot modify the lexical environment after transformation has completed.");
             ts.Debug.assert(lexicalEnvironmentSuspended, "Lexical environment is not suspended.");
             lexicalEnvironmentSuspended = false;
         }
-        /**
-         * Ends a lexical environment. The previous set of hoisted declarations are restored and
-         * any hoisted declarations added in this environment are returned.
-         */
         function endLexicalEnvironment() {
-            ts.Debug.assert(state > 0 /* Uninitialized */, "Cannot modify the lexical environment during initialization.");
-            ts.Debug.assert(state < 2 /* Completed */, "Cannot modify the lexical environment after transformation has completed.");
+            ts.Debug.assert(state > 0, "Cannot modify the lexical environment during initialization.");
+            ts.Debug.assert(state < 2, "Cannot modify the lexical environment after transformation has completed.");
             ts.Debug.assert(!lexicalEnvironmentSuspended, "Lexical environment is suspended.");
             var statements;
             if (lexicalEnvironmentVariableDeclarations || lexicalEnvironmentFunctionDeclarations) {
@@ -76139,8 +61184,7 @@ var ts;
                     statements = lexicalEnvironmentFunctionDeclarations.slice();
                 }
                 if (lexicalEnvironmentVariableDeclarations) {
-                    var statement = ts.createVariableStatement(
-                    /*modifiers*/ undefined, ts.createVariableDeclarationList(lexicalEnvironmentVariableDeclarations));
+                    var statement = ts.createVariableStatement(undefined, ts.createVariableDeclarationList(lexicalEnvironmentVariableDeclarations));
                     if (!statements) {
                         statements = [statement];
                     }
@@ -76149,7 +61193,6 @@ var ts;
                     }
                 }
             }
-            // Restore the previous lexical environment.
             lexicalEnvironmentStackOffset--;
             lexicalEnvironmentVariableDeclarations = lexicalEnvironmentVariableDeclarationsStack[lexicalEnvironmentStackOffset];
             lexicalEnvironmentFunctionDeclarations = lexicalEnvironmentFunctionDeclarationsStack[lexicalEnvironmentStackOffset];
@@ -76160,26 +61203,24 @@ var ts;
             return statements;
         }
         function requestEmitHelper(helper) {
-            ts.Debug.assert(state > 0 /* Uninitialized */, "Cannot modify the transformation context during initialization.");
-            ts.Debug.assert(state < 2 /* Completed */, "Cannot modify the transformation context after transformation has completed.");
+            ts.Debug.assert(state > 0, "Cannot modify the transformation context during initialization.");
+            ts.Debug.assert(state < 2, "Cannot modify the transformation context after transformation has completed.");
             ts.Debug.assert(!helper.scoped, "Cannot request a scoped emit helper.");
             emitHelpers = ts.append(emitHelpers, helper);
         }
         function readEmitHelpers() {
-            ts.Debug.assert(state > 0 /* Uninitialized */, "Cannot modify the transformation context during initialization.");
-            ts.Debug.assert(state < 2 /* Completed */, "Cannot modify the transformation context after transformation has completed.");
+            ts.Debug.assert(state > 0, "Cannot modify the transformation context during initialization.");
+            ts.Debug.assert(state < 2, "Cannot modify the transformation context after transformation has completed.");
             var helpers = emitHelpers;
             emitHelpers = undefined;
             return helpers;
         }
         function dispose() {
-            if (state < 3 /* Disposed */) {
-                // Clean up emit nodes on parse tree
-                for (var _i = 0, nodes_4 = nodes; _i < nodes_4.length; _i++) {
-                    var node = nodes_4[_i];
+            if (state < 3) {
+                for (var _i = 0, nodes_5 = nodes; _i < nodes_5.length; _i++) {
+                    var node = nodes_5[_i];
                     ts.disposeEmitNodes(ts.getSourceFileOfNode(ts.getParseTreeNode(node)));
                 }
-                // Release references to external entries for GC purposes.
                 lexicalEnvironmentVariableDeclarations = undefined;
                 lexicalEnvironmentVariableDeclarationsStack = undefined;
                 lexicalEnvironmentFunctionDeclarations = undefined;
@@ -76187,17 +61228,14 @@ var ts;
                 onSubstituteNode = undefined;
                 onEmitNode = undefined;
                 emitHelpers = undefined;
-                // Prevent further use of the transformation result.
-                state = 3 /* Disposed */;
+                state = 3;
             }
         }
     }
     ts.transformNodes = transformNodes;
 })(ts || (ts = {}));
-/* @internal */
 var ts;
 (function (ts) {
-    // Used for initialize lastEncodedSourceMapSpan and reset lastEncodedSourceMapSpan when updateLastEncodedAndRecordedSpans
     var defaultLastEncodedSourceMapSpan = {
         emittedLine: 1,
         emittedColumn: 1,
@@ -76210,14 +61248,11 @@ var ts;
         var extendedDiagnostics = compilerOptions.extendedDiagnostics;
         var currentSource;
         var currentSourceText;
-        var sourceMapDir; // The directory in which sourcemap will be
-        // Current source map file and its index in the sources list
+        var sourceMapDir;
         var sourceMapSourceIndex;
-        // Last recorded and encoded spans
         var lastRecordedSourceMapSpan;
         var lastEncodedSourceMapSpan;
         var lastEncodedNameIndex;
-        // Source map data
         var sourceMapData;
         var sourceMapDataList;
         var disabled = !(compilerOptions.sourceMap || compilerOptions.inlineSourceMap);
@@ -76234,21 +61269,11 @@ var ts;
             getText: getText,
             getSourceMappingURL: getSourceMappingURL,
         };
-        /**
-         * Skips trivia such as comments and white-space that can optionally overriden by the source map source
-         */
         function skipSourceTrivia(pos) {
             return currentSource.skipTrivia ? currentSource.skipTrivia(pos) : ts.skipTrivia(currentSourceText, pos);
         }
-        /**
-         * Initialize the SourceMapWriter for a new output file.
-         *
-         * @param filePath The path to the generated output file.
-         * @param sourceMapFilePath The path to the output source map file.
-         * @param sourceFileOrBundle The input source file or bundle for the program.
-         */
         function initialize(filePath, sourceMapFilePath, sourceFileOrBundle, outputSourceMapDataList) {
-            if (disabled || ts.fileExtensionIs(filePath, ".json" /* Json */)) {
+            if (disabled || ts.fileExtensionIs(filePath, ".json")) {
                 return;
             }
             if (sourceMapData) {
@@ -76257,13 +61282,10 @@ var ts;
             sourceMapDataList = outputSourceMapDataList;
             currentSource = undefined;
             currentSourceText = undefined;
-            // Current source map file and its index in the sources list
             sourceMapSourceIndex = -1;
-            // Last recorded and encoded spans
             lastRecordedSourceMapSpan = undefined;
             lastEncodedSourceMapSpan = defaultLastEncodedSourceMapSpan;
             lastEncodedNameIndex = 0;
-            // Initialize source map data
             completedSections = [];
             sectionStartLine = 1;
             sectionStartColumn = 1;
@@ -76279,26 +61301,18 @@ var ts;
                 sourceMapSourcesContent: compilerOptions.inlineSources ? [] : undefined,
                 sourceMapDecodedMappings: []
             };
-            // Normalize source root and make sure it has trailing "/" so that it can be used to combine paths with the
-            // relative paths of the sources list in the sourcemap
             sourceMapData.sourceMapSourceRoot = ts.normalizeSlashes(sourceMapData.sourceMapSourceRoot);
-            if (sourceMapData.sourceMapSourceRoot.length && sourceMapData.sourceMapSourceRoot.charCodeAt(sourceMapData.sourceMapSourceRoot.length - 1) !== 47 /* slash */) {
+            if (sourceMapData.sourceMapSourceRoot.length && sourceMapData.sourceMapSourceRoot.charCodeAt(sourceMapData.sourceMapSourceRoot.length - 1) !== 47) {
                 sourceMapData.sourceMapSourceRoot += ts.directorySeparator;
             }
             if (compilerOptions.mapRoot) {
                 sourceMapDir = ts.normalizeSlashes(compilerOptions.mapRoot);
-                if (sourceFileOrBundle.kind === 274 /* SourceFile */) { // emitting single module file
-                    // For modules or multiple emit files the mapRoot will have directory structure like the sources
-                    // So if src\a.ts and src\lib\b.ts are compiled together user would be moving the maps into mapRoot\a.js.map and mapRoot\lib\b.js.map
+                if (sourceFileOrBundle.kind === 274) {
                     sourceMapDir = ts.getDirectoryPath(ts.getSourceFilePathInNewDir(sourceFileOrBundle, host, sourceMapDir));
                 }
                 if (!ts.isRootedDiskPath(sourceMapDir) && !ts.isUrl(sourceMapDir)) {
-                    // The relative paths are relative to the common directory
                     sourceMapDir = ts.combinePaths(host.getCommonSourceDirectory(), sourceMapDir);
-                    sourceMapData.jsSourceMappingURL = ts.getRelativePathToDirectoryOrUrl(ts.getDirectoryPath(ts.normalizePath(filePath)), // get the relative sourceMapDir path based on jsFilePath
-                    ts.combinePaths(sourceMapDir, sourceMapData.jsSourceMappingURL), // this is where user expects to see sourceMap
-                    host.getCurrentDirectory(), host.getCanonicalFileName, 
-                    /*isAbsolutePathAnUrl*/ true);
+                    sourceMapData.jsSourceMappingURL = ts.getRelativePathToDirectoryOrUrl(ts.getDirectoryPath(ts.normalizePath(filePath)), ts.combinePaths(sourceMapDir, sourceMapData.jsSourceMappingURL), host.getCurrentDirectory(), host.getCanonicalFileName, true);
                 }
                 else {
                     sourceMapData.jsSourceMappingURL = ts.combinePaths(sourceMapDir, sourceMapData.jsSourceMappingURL);
@@ -76308,14 +61322,10 @@ var ts;
                 sourceMapDir = ts.getDirectoryPath(ts.normalizePath(filePath));
             }
         }
-        /**
-         * Reset the SourceMapWriter to an empty state.
-         */
         function reset() {
             if (disabled) {
                 return;
             }
-            // Record source map data for the test harness.
             if (sourceMapDataList) {
                 sourceMapDataList.push(sourceMapData);
             }
@@ -76350,7 +61360,7 @@ var ts;
         }
         function generateMap() {
             if (completedSections.length) {
-                captureSectionalSpanIfNeeded(/*reset*/ false);
+                captureSectionalSpanIfNeeded(false);
                 return {
                     version: 3,
                     file: sourceMapData.sourceMapFile,
@@ -76361,35 +61371,26 @@ var ts;
                 return captureSection();
             }
         }
-        // Encoding for sourcemap span
         function encodeLastRecordedSourceMapSpan() {
             if (!lastRecordedSourceMapSpan || lastRecordedSourceMapSpan === lastEncodedSourceMapSpan) {
                 return;
             }
             var prevEncodedEmittedColumn = lastEncodedSourceMapSpan.emittedColumn;
-            // Line/Comma delimiters
             if (lastEncodedSourceMapSpan.emittedLine === lastRecordedSourceMapSpan.emittedLine) {
-                // Emit comma to separate the entry
                 if (sourceMapData.sourceMapMappings) {
                     sourceMapData.sourceMapMappings += ",";
                 }
             }
             else {
-                // Emit line delimiters
                 for (var encodedLine = lastEncodedSourceMapSpan.emittedLine; encodedLine < lastRecordedSourceMapSpan.emittedLine; encodedLine++) {
                     sourceMapData.sourceMapMappings += ";";
                 }
                 prevEncodedEmittedColumn = 1;
             }
-            // 1. Relative Column 0 based
             sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.emittedColumn - prevEncodedEmittedColumn);
-            // 2. Relative sourceIndex
             sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.sourceIndex - lastEncodedSourceMapSpan.sourceIndex);
-            // 3. Relative sourceLine 0 based
             sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.sourceLine - lastEncodedSourceMapSpan.sourceLine);
-            // 4. Relative sourceColumn 0 based
             sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.sourceColumn - lastEncodedSourceMapSpan.sourceColumn);
-            // 5. Relative namePosition 0 based
             if (lastRecordedSourceMapSpan.nameIndex >= 0) {
                 ts.Debug.assert(false, "We do not support name index right now, Make sure to update updateLastEncodedAndRecordedSpans when we start using this");
                 sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.nameIndex - lastEncodedNameIndex);
@@ -76398,14 +61399,6 @@ var ts;
             lastEncodedSourceMapSpan = lastRecordedSourceMapSpan;
             sourceMapData.sourceMapDecodedMappings.push(lastEncodedSourceMapSpan);
         }
-        /**
-         * Emits a mapping.
-         *
-         * If the position is synthetic (undefined or a negative value), no mapping will be
-         * created.
-         *
-         * @param pos The position.
-         */
         function emitPos(pos) {
             if (disabled || ts.positionIsSynthesized(pos) || isJsonSourceMapSource(currentSource)) {
                 return;
@@ -76414,21 +61407,17 @@ var ts;
                 ts.performance.mark("beforeSourcemap");
             }
             var sourceLinePos = ts.getLineAndCharacterOfPosition(currentSource, pos);
-            // Convert the location to be one-based.
             sourceLinePos.line++;
             sourceLinePos.character++;
             var emittedLine = writer.getLine() - sectionStartLine + 1;
             var emittedColumn = emittedLine === 0 ? (writer.getColumn() - sectionStartColumn + 1) : writer.getColumn();
-            // If this location wasn't recorded or the location in source is going backwards, record the span
             if (!lastRecordedSourceMapSpan ||
                 lastRecordedSourceMapSpan.emittedLine !== emittedLine ||
                 lastRecordedSourceMapSpan.emittedColumn !== emittedColumn ||
                 (lastRecordedSourceMapSpan.sourceIndex === sourceMapSourceIndex &&
                     (lastRecordedSourceMapSpan.sourceLine > sourceLinePos.line ||
                         (lastRecordedSourceMapSpan.sourceLine === sourceLinePos.line && lastRecordedSourceMapSpan.sourceColumn > sourceLinePos.character)))) {
-                // Encode the last recordedSpan before assigning new
                 encodeLastRecordedSourceMapSpan();
-                // New span
                 lastRecordedSourceMapSpan = {
                     emittedLine: emittedLine,
                     emittedColumn: emittedColumn,
@@ -76438,7 +61427,6 @@ var ts;
                 };
             }
             else {
-                // Take the new pos instead since there is no change in emittedLine and column since last location
                 lastRecordedSourceMapSpan.sourceLine = sourceLinePos.line;
                 lastRecordedSourceMapSpan.sourceColumn = sourceLinePos.character;
                 lastRecordedSourceMapSpan.sourceIndex = sourceMapSourceIndex;
@@ -76449,34 +61437,26 @@ var ts;
             }
         }
         function captureSectionalSpanIfNeeded(reset) {
-            if (lastRecordedSourceMapSpan && lastRecordedSourceMapSpan === lastEncodedSourceMapSpan) { // If we've recorded some spans, save them
+            if (lastRecordedSourceMapSpan && lastRecordedSourceMapSpan === lastEncodedSourceMapSpan) {
                 completedSections.push({ offset: { line: sectionStartLine - 1, column: sectionStartColumn - 1 }, map: captureSection() });
                 if (reset) {
                     resetSectionalData();
                 }
             }
         }
-        /**
-         * Emits a node with possible leading and trailing source maps.
-         *
-         * @param hint A hint as to the intended usage of the node.
-         * @param node The node to emit.
-         * @param emitCallback The callback used to emit the node.
-         */
         function emitNodeWithSourceMap(hint, node, emitCallback) {
             if (disabled || ts.isInJsonFile(node)) {
                 return emitCallback(hint, node);
             }
             if (node) {
                 if (ts.isUnparsedSource(node) && node.sourceMapText !== undefined) {
-                    captureSectionalSpanIfNeeded(/*reset*/ true);
+                    captureSectionalSpanIfNeeded(true);
                     var text = node.sourceMapText;
                     var parsed = void 0;
                     try {
                         parsed = JSON.parse(text);
                     }
                     catch (_a) {
-                        // empty
                     }
                     var offset = { line: writer.getLine() - 1, column: writer.getColumn() - 1 };
                     completedSections.push(parsed
@@ -76486,7 +61466,6 @@ var ts;
                         }
                         : {
                             offset: offset,
-                            // This is just passes the buck on sourcemaps we don't really understand, instead of issuing an error (which would be difficult this late)
                             url: "data:application/json;charset=utf-8;base64," + ts.base64encode(ts.sys, text)
                         });
                     var emitResult = emitCallback(hint, node);
@@ -76497,7 +61476,7 @@ var ts;
                     return emitResult;
                 }
                 var emitNode = node.emitNode;
-                var emitFlags = emitNode && emitNode.flags || 0 /* None */;
+                var emitFlags = emitNode && emitNode.flags || 0;
                 var range = emitNode && emitNode.sourceMapRange;
                 var _b = range || node, pos = _b.pos, end = _b.end;
                 var source = range && range.source;
@@ -76506,14 +61485,14 @@ var ts;
                     source = undefined;
                 if (source)
                     setSourceFile(source);
-                if (node.kind !== 300 /* NotEmittedStatement */
-                    && (emitFlags & 16 /* NoLeadingSourceMap */) === 0
+                if (node.kind !== 300
+                    && (emitFlags & 16) === 0
                     && pos >= 0) {
                     emitPos(skipSourceTrivia(pos));
                 }
                 if (source)
                     setSourceFile(oldSource);
-                if (emitFlags & 64 /* NoNestedSourceMaps */) {
+                if (emitFlags & 64) {
                     disabled = true;
                     emitCallback(hint, node);
                     disabled = false;
@@ -76523,8 +61502,8 @@ var ts;
                 }
                 if (source)
                     setSourceFile(source);
-                if (node.kind !== 300 /* NotEmittedStatement */
-                    && (emitFlags & 32 /* NoTrailingSourceMap */) === 0
+                if (node.kind !== 300
+                    && (emitFlags & 32) === 0
                     && end >= 0) {
                     emitPos(end);
                 }
@@ -76532,41 +61511,28 @@ var ts;
                     setSourceFile(oldSource);
             }
         }
-        /**
-         * Emits a token of a node with possible leading and trailing source maps.
-         *
-         * @param node The node containing the token.
-         * @param token The token to emit.
-         * @param tokenStartPos The start pos of the token.
-         * @param emitCallback The callback used to emit the token.
-         */
         function emitTokenWithSourceMap(node, token, writer, tokenPos, emitCallback) {
             if (disabled || ts.isInJsonFile(node)) {
                 return emitCallback(token, writer, tokenPos);
             }
             var emitNode = node && node.emitNode;
-            var emitFlags = emitNode && emitNode.flags || 0 /* None */;
+            var emitFlags = emitNode && emitNode.flags || 0;
             var range = emitNode && emitNode.tokenSourceMapRanges && emitNode.tokenSourceMapRanges[token];
             tokenPos = skipSourceTrivia(range ? range.pos : tokenPos);
-            if ((emitFlags & 128 /* NoTokenLeadingSourceMaps */) === 0 && tokenPos >= 0) {
+            if ((emitFlags & 128) === 0 && tokenPos >= 0) {
                 emitPos(tokenPos);
             }
             tokenPos = emitCallback(token, writer, tokenPos);
             if (range)
                 tokenPos = range.end;
-            if ((emitFlags & 256 /* NoTokenTrailingSourceMaps */) === 0 && tokenPos >= 0) {
+            if ((emitFlags & 256) === 0 && tokenPos >= 0) {
                 emitPos(tokenPos);
             }
             return tokenPos;
         }
         function isJsonSourceMapSource(sourceFile) {
-            return ts.fileExtensionIs(sourceFile.fileName, ".json" /* Json */);
+            return ts.fileExtensionIs(sourceFile.fileName, ".json");
         }
-        /**
-         * Set the current source file.
-         *
-         * @param sourceFile The source file.
-         */
         function setSourceFile(sourceFile) {
             if (disabled) {
                 return;
@@ -76576,42 +61542,30 @@ var ts;
             if (isJsonSourceMapSource(sourceFile)) {
                 return;
             }
-            // Add the file to tsFilePaths
-            // If sourceroot option: Use the relative path corresponding to the common directory path
-            // otherwise source locations relative to map file location
             var sourcesDirectoryPath = compilerOptions.sourceRoot ? host.getCommonSourceDirectory() : sourceMapDir;
-            var source = ts.getRelativePathToDirectoryOrUrl(sourcesDirectoryPath, currentSource.fileName, host.getCurrentDirectory(), host.getCanonicalFileName, 
-            /*isAbsolutePathAnUrl*/ true);
+            var source = ts.getRelativePathToDirectoryOrUrl(sourcesDirectoryPath, currentSource.fileName, host.getCurrentDirectory(), host.getCanonicalFileName, true);
             sourceMapSourceIndex = sourceMapData.sourceMapSources.indexOf(source);
             if (sourceMapSourceIndex === -1) {
                 sourceMapSourceIndex = sourceMapData.sourceMapSources.length;
                 sourceMapData.sourceMapSources.push(source);
-                // The one that can be used from program to get the actual source file
                 sourceMapData.inputSourceFileNames.push(currentSource.fileName);
                 if (compilerOptions.inlineSources) {
                     sourceMapData.sourceMapSourcesContent.push(currentSource.text);
                 }
             }
         }
-        /**
-         * Gets the text for the source map.
-         */
         function getText() {
             if (disabled || isJsonSourceMapSource(currentSource)) {
-                return undefined; // TODO: GH#18217
+                return undefined;
             }
             encodeLastRecordedSourceMapSpan();
             return JSON.stringify(generateMap());
         }
-        /**
-         * Gets the SourceMappingURL for the source map.
-         */
         function getSourceMappingURL() {
             if (disabled || isJsonSourceMapSource(currentSource)) {
-                return undefined; // TODO: GH#18217
+                return undefined;
             }
             if (compilerOptions.inlineSourceMap) {
-                // Encode the sourceMap into the sourceMap url
                 var base64SourceMapText = ts.base64encode(ts.sys, getText());
                 return sourceMapData.jsSourceMappingURL = "data:application/json;base64," + base64SourceMapText;
             }
@@ -76629,24 +61583,17 @@ var ts;
         throw TypeError(inValue + ": not a 64 based value");
     }
     function base64VLQFormatEncode(inValue) {
-        // Add a new least significant bit that has the sign of the value.
-        // if negative number the least significant bit that gets added to the number has value 1
-        // else least significant bit value that gets added is 0
-        // eg. -1 changes to binary : 01 [1] => 3
-        //     +1 changes to binary : 01 [0] => 2
         if (inValue < 0) {
             inValue = ((-inValue) << 1) + 1;
         }
         else {
             inValue = inValue << 1;
         }
-        // Encode 5 bits at a time starting from least significant bits
         var encodedStr = "";
         do {
-            var currentDigit = inValue & 31; // 11111
+            var currentDigit = inValue & 31;
             inValue = inValue >> 5;
             if (inValue > 0) {
-                // There are still more digits to decode, set the msb (6th bit)
                 currentDigit = currentDigit | 32;
             }
             encodedStr = encodedStr + base64FormatEncode(currentDigit);
@@ -76654,7 +61601,6 @@ var ts;
         return encodedStr;
     }
 })(ts || (ts = {}));
-/* @internal */
 var ts;
 (function (ts) {
     function createCommentWriter(printerOptions, emitPos) {
@@ -76690,24 +61636,18 @@ var ts;
                 var emitFlags = emitNode && emitNode.flags || 0;
                 var _a = emitNode && emitNode.commentRange || node, pos = _a.pos, end = _a.end;
                 if ((pos < 0 && end < 0) || (pos === end)) {
-                    // Both pos and end are synthesized, so just emit the node without comments.
                     emitNodeWithSynthesizedComments(hint, node, emitNode, emitFlags, emitCallback);
                 }
                 else {
                     if (extendedDiagnostics) {
                         ts.performance.mark("preEmitNodeWithComment");
                     }
-                    var isEmittedNode = node.kind !== 300 /* NotEmittedStatement */;
-                    // We have to explicitly check that the node is JsxText because if the compilerOptions.jsx is "preserve" we will not do any transformation.
-                    // It is expensive to walk entire tree just to set one kind of node to have no comments.
-                    var skipLeadingComments = pos < 0 || (emitFlags & 512 /* NoLeadingComments */) !== 0 || node.kind === 10 /* JsxText */;
-                    var skipTrailingComments = end < 0 || (emitFlags & 1024 /* NoTrailingComments */) !== 0 || node.kind === 10 /* JsxText */;
-                    // Emit leading comments if the position is not synthesized and the node
-                    // has not opted out from emitting leading comments.
+                    var isEmittedNode = node.kind !== 300;
+                    var skipLeadingComments = pos < 0 || (emitFlags & 512) !== 0 || node.kind === 10;
+                    var skipTrailingComments = end < 0 || (emitFlags & 1024) !== 0 || node.kind === 10;
                     if (!skipLeadingComments) {
                         emitLeadingComments(pos, isEmittedNode);
                     }
-                    // Save current container state on the stack.
                     var savedContainerPos = containerPos;
                     var savedContainerEnd = containerEnd;
                     var savedDeclarationListContainerEnd = declarationListContainerEnd;
@@ -76716,9 +61656,7 @@ var ts;
                     }
                     if (!skipTrailingComments) {
                         containerEnd = end;
-                        // To avoid invalid comment emit in a down-level binding pattern, we
-                        // keep track of the last declaration list container's end
-                        if (node.kind === 233 /* VariableDeclarationList */) {
+                        if (node.kind === 233) {
                             declarationListContainerEnd = end;
                         }
                     }
@@ -76729,12 +61667,9 @@ var ts;
                     if (extendedDiagnostics) {
                         ts.performance.mark("postEmitNodeWithComment");
                     }
-                    // Restore previous container state.
                     containerPos = savedContainerPos;
                     containerEnd = savedContainerEnd;
                     declarationListContainerEnd = savedDeclarationListContainerEnd;
-                    // Emit trailing comments if the position is not synthesized and the node
-                    // has not opted out from emitting leading comments and is an emitted node.
                     if (!skipTrailingComments && isEmittedNode) {
                         emitTrailingComments(end);
                     }
@@ -76768,11 +61703,11 @@ var ts;
             }
         }
         function emitLeadingSynthesizedComment(comment) {
-            if (comment.kind === 2 /* SingleLineCommentTrivia */) {
+            if (comment.kind === 2) {
                 writer.writeLine();
             }
             writeSynthesizedComment(comment);
-            if (comment.hasTrailingNewLine || comment.kind === 2 /* SingleLineCommentTrivia */) {
+            if (comment.hasTrailingNewLine || comment.kind === 2) {
                 writer.writeLine();
             }
             else {
@@ -76790,16 +61725,16 @@ var ts;
         }
         function writeSynthesizedComment(comment) {
             var text = formatSynthesizedComment(comment);
-            var lineMap = comment.kind === 3 /* MultiLineCommentTrivia */ ? ts.computeLineStarts(text) : undefined;
+            var lineMap = comment.kind === 3 ? ts.computeLineStarts(text) : undefined;
             ts.writeCommentRange(text, lineMap, writer, 0, text.length, newLine);
         }
         function formatSynthesizedComment(comment) {
-            return comment.kind === 3 /* MultiLineCommentTrivia */
+            return comment.kind === 3
                 ? "/*" + comment.text + "*/"
                 : "//" + comment.text;
         }
         function emitNodeWithNestedComments(hint, node, emitFlags, emitCallback) {
-            if (emitFlags & 2048 /* NoNestedComments */) {
+            if (emitFlags & 2048) {
                 disabled = true;
                 emitCallback(hint, node);
                 disabled = false;
@@ -76814,15 +61749,15 @@ var ts;
             }
             var pos = detachedRange.pos, end = detachedRange.end;
             var emitFlags = ts.getEmitFlags(node);
-            var skipLeadingComments = pos < 0 || (emitFlags & 512 /* NoLeadingComments */) !== 0;
-            var skipTrailingComments = disabled || end < 0 || (emitFlags & 1024 /* NoTrailingComments */) !== 0;
+            var skipLeadingComments = pos < 0 || (emitFlags & 512) !== 0;
+            var skipTrailingComments = disabled || end < 0 || (emitFlags & 1024) !== 0;
             if (!skipLeadingComments) {
                 emitDetachedCommentsAndUpdateCommentsInfo(detachedRange);
             }
             if (extendedDiagnostics) {
                 ts.performance.measure("commentTime", "preEmitBodyWithDetachedComments");
             }
-            if (emitFlags & 2048 /* NoNestedComments */ && !disabled) {
+            if (emitFlags & 2048 && !disabled) {
                 disabled = true;
                 emitCallback(node);
                 disabled = false;
@@ -76834,7 +61769,7 @@ var ts;
                 ts.performance.mark("beginEmitBodyWithDetachedCommetns");
             }
             if (!skipTrailingComments) {
-                emitLeadingComments(detachedRange.end, /*isEmittedNode*/ true);
+                emitLeadingComments(detachedRange.end, true);
                 if (hasWrittenComment && !writer.isAtStartOfLine()) {
                     writer.writeLine();
                 }
@@ -76849,14 +61784,6 @@ var ts;
                 forEachLeadingCommentToEmit(pos, emitLeadingComment);
             }
             else if (pos === 0) {
-                // If the node will not be emitted in JS, remove all the comments(normal, pinned and ///) associated with the node,
-                // unless it is a triple slash comment at the top of the file.
-                // For Example:
-                //      /// <reference-path ...>
-                //      declare var x;
-                //      /// <reference-path ...>
-                //      interface F {}
-                //  The first /// will NOT be removed while the second one will be removed even though both node will not be emitted
                 forEachLeadingCommentToEmit(pos, emitTripleSlashLeadingComment);
             }
         }
@@ -76878,7 +61805,6 @@ var ts;
                 ts.emitNewLineBeforeLeadingCommentOfPosition(currentLineMap, writer, rangePos, commentPos);
                 hasWrittenComment = true;
             }
-            // Leading comments are emitted at /*leading comment1 */space/*leading comment*/space
             if (emitPos)
                 emitPos(commentPos);
             ts.writeCommentRange(currentText, currentLineMap, writer, commentPos, commentEnd, newLine);
@@ -76887,7 +61813,7 @@ var ts;
             if (hasTrailingNewLine) {
                 writer.writeLine();
             }
-            else if (kind === 3 /* MultiLineCommentTrivia */) {
+            else if (kind === 3) {
                 writer.write(" ");
             }
         }
@@ -76895,7 +61821,7 @@ var ts;
             if (disabled || pos === -1) {
                 return;
             }
-            emitLeadingComments(pos, /*isEmittedNode*/ true);
+            emitLeadingComments(pos, true);
         }
         function emitTrailingComments(pos) {
             forEachTrailingCommentToEmit(pos, emitTrailingComment);
@@ -76903,7 +61829,6 @@ var ts;
         function emitTrailingComment(commentPos, commentEnd, _kind, hasTrailingNewLine) {
             if (!shouldWriteComment(currentText, commentPos))
                 return;
-            // trailing comments are emitted at space/*trailing comment1 */space/*trailing comment2*/
             if (!writer.isAtStartOfLine()) {
                 writer.write(" ");
             }
@@ -76929,7 +61854,6 @@ var ts;
             }
         }
         function emitTrailingCommentOfPosition(commentPos, commentEnd, _kind, hasTrailingNewLine) {
-            // trailing comments of a position are emitted at /*trailing comment1 */space/*trailing comment*/space
             if (emitPos)
                 emitPos(commentPos);
             ts.writeCommentRange(currentText, currentLineMap, writer, commentPos, commentEnd, newLine);
@@ -76943,18 +61867,16 @@ var ts;
             }
         }
         function forEachLeadingCommentToEmit(pos, cb) {
-            // Emit the leading comments only if the container's pos doesn't match because the container should take care of emitting these comments
             if (containerPos === -1 || pos !== containerPos) {
                 if (hasDetachedComments(pos)) {
                     forEachLeadingCommentWithoutDetachedComments(cb);
                 }
                 else {
-                    ts.forEachLeadingCommentRange(currentText, pos, cb, /*state*/ pos);
+                    ts.forEachLeadingCommentRange(currentText, pos, cb, pos);
                 }
             }
         }
         function forEachTrailingCommentToEmit(end, cb) {
-            // Emit the trailing comments only if the container's end doesn't match because the container should take care of emitting these comments
             if (containerEnd === -1 || (end !== containerEnd && end !== declarationListContainerEnd)) {
                 ts.forEachTrailingCommentRange(currentText, end, cb);
             }
@@ -76978,7 +61900,6 @@ var ts;
             return detachedCommentsInfo !== undefined && ts.last(detachedCommentsInfo).nodePos === pos;
         }
         function forEachLeadingCommentWithoutDetachedComments(cb) {
-            // get the leading comments from detachedPos
             var pos = ts.last(detachedCommentsInfo).detachedCommentEndPos;
             if (detachedCommentsInfo.length - 1) {
                 detachedCommentsInfo.pop();
@@ -76986,7 +61907,7 @@ var ts;
             else {
                 detachedCommentsInfo = undefined;
             }
-            ts.forEachLeadingCommentRange(currentText, pos, cb, /*state*/ pos);
+            ts.forEachLeadingCommentRange(currentText, pos, cb, pos);
         }
         function emitDetachedCommentsAndUpdateCommentsInfo(range) {
             var currentDetachedCommentInfo = ts.emitDetachedComments(currentText, currentLineMap, writer, writeComment, range, newLine, disabled);
@@ -77008,11 +61929,6 @@ var ts;
             if (emitPos)
                 emitPos(commentEnd);
         }
-        /**
-         * Determine if the given comment is a triple-slash
-         *
-         * @return true if the comment is a triple-slash comment else false
-         */
         function isTripleSlashComment(commentPos, commentEnd) {
             return ts.isRecognizedTripleSlashComment(currentText, commentPos, commentEnd);
         }
@@ -77023,16 +61939,6 @@ var ts;
 (function (ts) {
     var infoExtension = ".tsbundleinfo";
     var brackets = createBracketsMap();
-    /*@internal*/
-    /**
-     * Iterates over the source files that are expected to have an emit output.
-     *
-     * @param host An EmitHost.
-     * @param action The action to execute.
-     * @param sourceFilesOrTargetSourceFile
-     *   If an array, the full list of source files to emit.
-     *   Else, calls `getSourceFilesToEmit` with the (optional) target source file to determine the list of source files to emit.
-     */
     function forEachEmittedFile(host, action, sourceFilesOrTargetSourceFile, emitOnlyDtsFiles) {
         if (emitOnlyDtsFiles === void 0) { emitOnlyDtsFiles = false; }
         var sourceFiles = ts.isArray(sourceFilesOrTargetSourceFile) ? sourceFilesOrTargetSourceFile : ts.getSourceFilesToEmit(host, sourceFilesOrTargetSourceFile);
@@ -77057,13 +61963,12 @@ var ts;
         }
     }
     ts.forEachEmittedFile = forEachEmittedFile;
-    /*@internal*/
     function getOutputPathsFor(sourceFile, host, forceDtsPaths) {
         var options = host.getCompilerOptions();
-        if (sourceFile.kind === 275 /* Bundle */) {
+        if (sourceFile.kind === 275) {
             var jsFilePath = options.outFile || options.out;
             var sourceMapFilePath = getSourceMapFilePath(jsFilePath, options);
-            var declarationFilePath = (forceDtsPaths || options.declaration) ? ts.removeFileExtension(jsFilePath) + ".d.ts" /* Dts */ : undefined;
+            var declarationFilePath = (forceDtsPaths || options.declaration) ? ts.removeFileExtension(jsFilePath) + ".d.ts" : undefined;
             var declarationMapPath = ts.getAreDeclarationMapsEnabled(options) ? declarationFilePath + ".map" : undefined;
             var bundleInfoPath = options.references && jsFilePath ? (ts.removeFileExtension(jsFilePath) + infoExtension) : undefined;
             return { jsFilePath: jsFilePath, sourceMapFilePath: sourceMapFilePath, declarationFilePath: declarationFilePath, declarationMapPath: declarationMapPath, bundleInfoPath: bundleInfoPath };
@@ -77071,7 +61976,6 @@ var ts;
         else {
             var jsFilePath = ts.getOwnEmitOutputFilePath(sourceFile, host, getOutputExtension(sourceFile, options));
             var sourceMapFilePath = ts.isJsonSourceFile(sourceFile) ? undefined : getSourceMapFilePath(jsFilePath, options);
-            // For legacy reasons (ie, we have baselines capturing the behavior), js files don't report a .d.ts output path - this would only matter if `declaration` and `allowJs` were both on, which is currently an error
             var isJs = ts.isSourceFileJavaScript(sourceFile);
             var declarationFilePath = ((forceDtsPaths || options.declaration) && !isJs) ? ts.getDeclarationEmitOutputFilePath(sourceFile, host) : undefined;
             var declarationMapPath = ts.getAreDeclarationMapsEnabled(options) ? declarationFilePath + ".map" : undefined;
@@ -77088,30 +61992,23 @@ var ts;
             totalLength: -1
         };
     }
-    // JavaScript files are always LanguageVariant.JSX, as JSX syntax is allowed in .js files also.
-    // So for JavaScript files, '.jsx' is only emitted if the input was '.jsx', and JsxEmit.Preserve.
-    // For TypeScript, the only time to emit with a '.jsx' extension, is on JSX input, and JsxEmit.Preserve
-    /* @internal */
     function getOutputExtension(sourceFile, options) {
         if (ts.isJsonSourceFile(sourceFile)) {
-            return ".json" /* Json */;
+            return ".json";
         }
-        if (options.jsx === 1 /* Preserve */) {
+        if (options.jsx === 1) {
             if (ts.isSourceFileJavaScript(sourceFile)) {
-                if (ts.fileExtensionIs(sourceFile.fileName, ".jsx" /* Jsx */)) {
-                    return ".jsx" /* Jsx */;
+                if (ts.fileExtensionIs(sourceFile.fileName, ".jsx")) {
+                    return ".jsx";
                 }
             }
-            else if (sourceFile.languageVariant === 1 /* JSX */) {
-                // TypeScript source file preserving JSX syntax
-                return ".jsx" /* Jsx */;
+            else if (sourceFile.languageVariant === 1) {
+                return ".jsx";
             }
         }
-        return ".js" /* Js */;
+        return ".js";
     }
     ts.getOutputExtension = getOutputExtension;
-    /*@internal*/
-    // targetSourceFile is when users only want one file in entire project to be emitted. This is used in compileOnSave feature
     function emitFiles(resolver, host, targetSourceFile, emitOnlyDtsFiles, transformers, declarationTransformers) {
         var compilerOptions = host.getCompilerOptions();
         var sourceMapDataList = (compilerOptions.sourceMap || compilerOptions.inlineSourceMap || ts.getAreDeclarationMapsEnabled(compilerOptions)) ? [] : undefined;
@@ -77128,7 +62025,6 @@ var ts;
         });
         var bundleInfo = createDefaultBundleInfo();
         var emitSkipped = false;
-        // Emit each output file
         ts.performance.mark("beforePrint");
         forEachEmittedFile(host, emitSourceFileOrBundle, ts.getSourceFilesToEmit(host, targetSourceFile), emitOnlyDtsFiles);
         ts.performance.measure("printTime", "beforePrint");
@@ -77158,7 +62054,6 @@ var ts;
             }
         }
         function emitJsFileOrBundle(sourceFileOrBundle, jsFilePath, sourceMapFilePath, bundleInfoPath) {
-            // Make sure not to write js file and source map file if any of them cannot be written
             if (host.isEmitBlocked(jsFilePath) || compilerOptions.noEmit || compilerOptions.emitDeclarationOnly) {
                 emitSkipped = true;
                 return;
@@ -77166,25 +62061,18 @@ var ts;
             if (emitOnlyDtsFiles) {
                 return;
             }
-            // Transform the source files
-            var transform = ts.transformNodes(resolver, host, compilerOptions, [sourceFileOrBundle], transformers, /*allowDtsFiles*/ false);
-            // Create a printer to print the nodes
+            var transform = ts.transformNodes(resolver, host, compilerOptions, [sourceFileOrBundle], transformers, false);
             var printer = createPrinter(__assign({}, compilerOptions, { noEmitHelpers: compilerOptions.noEmitHelpers }), {
-                // resolver hooks
                 hasGlobalName: resolver.hasGlobalName,
-                // transform hooks
                 onEmitNode: transform.emitNodeWithNotification,
                 substituteNode: transform.substituteNode,
-                // sourcemap hooks
                 onEmitSourceMapOfNode: sourceMap.emitNodeWithSourceMap,
                 onEmitSourceMapOfToken: sourceMap.emitTokenWithSourceMap,
                 onEmitSourceMapOfPosition: sourceMap.emitPos,
-                // emitter hooks
                 onSetSourceFile: setSourceFile,
             });
             ts.Debug.assert(transform.transformed.length === 1, "Should only see one output from the transform");
             printSourceFileOrBundle(jsFilePath, sourceMapFilePath, transform.transformed[0], bundleInfoPath, printer, sourceMap);
-            // Clean up emit nodes on parse tree
             transform.dispose();
         }
         function emitDeclarationFileOrBundle(sourceFileOrBundle, declarationFilePath, declarationMapPath) {
@@ -77192,10 +62080,9 @@ var ts;
                 return;
             }
             var sourceFiles = ts.isSourceFile(sourceFileOrBundle) ? [sourceFileOrBundle] : sourceFileOrBundle.sourceFiles;
-            // Setup and perform the transformation to retrieve declarations from the input files
             var nonJsFiles = ts.filter(sourceFiles, ts.isSourceFileNotJavaScript);
             var inputListOrBundle = (compilerOptions.outFile || compilerOptions.out) ? [ts.createBundle(nonJsFiles, !ts.isSourceFile(sourceFileOrBundle) ? sourceFileOrBundle.prepends : undefined)] : nonJsFiles;
-            var declarationTransform = ts.transformNodes(resolver, host, compilerOptions, inputListOrBundle, ts.concatenate([ts.transformDeclarations], declarationTransformers), /*allowDtsFiles*/ false);
+            var declarationTransform = ts.transformNodes(resolver, host, compilerOptions, inputListOrBundle, ts.concatenate([ts.transformDeclarations], declarationTransformers), false);
             if (ts.length(declarationTransform.diagnostics)) {
                 for (var _a = 0, _b = declarationTransform.diagnostics; _a < _b.length; _a++) {
                     var diagnostic = _b[_a];
@@ -77203,14 +62090,11 @@ var ts;
                 }
             }
             var declarationPrinter = createPrinter(__assign({}, compilerOptions, { onlyPrintJsDocStyle: true, noEmitHelpers: true }), {
-                // resolver hooks
                 hasGlobalName: resolver.hasGlobalName,
-                // sourcemap hooks
                 onEmitSourceMapOfNode: declarationSourceMap.emitNodeWithSourceMap,
                 onEmitSourceMapOfToken: declarationSourceMap.emitTokenWithSourceMap,
                 onEmitSourceMapOfPosition: declarationSourceMap.emitPos,
                 onSetSourceFile: setSourceFileForDeclarationSourceMaps,
-                // transform hooks
                 onEmitNode: declarationTransform.emitNodeWithNotification,
                 substituteNode: declarationTransform.substituteNode,
             });
@@ -77218,13 +62102,13 @@ var ts;
             emitSkipped = emitSkipped || declBlocked;
             if (!declBlocked || emitOnlyDtsFiles) {
                 ts.Debug.assert(declarationTransform.transformed.length === 1, "Should only see one output from the decl transform");
-                printSourceFileOrBundle(declarationFilePath, declarationMapPath, declarationTransform.transformed[0], /* bundleInfopath*/ undefined, declarationPrinter, declarationSourceMap);
+                printSourceFileOrBundle(declarationFilePath, declarationMapPath, declarationTransform.transformed[0], undefined, declarationPrinter, declarationSourceMap);
             }
             declarationTransform.dispose();
         }
         function printSourceFileOrBundle(jsFilePath, sourceMapFilePath, sourceFileOrBundle, bundleInfoPath, printer, mapRecorder) {
-            var bundle = sourceFileOrBundle.kind === 275 /* Bundle */ ? sourceFileOrBundle : undefined;
-            var sourceFile = sourceFileOrBundle.kind === 274 /* SourceFile */ ? sourceFileOrBundle : undefined;
+            var bundle = sourceFileOrBundle.kind === 275 ? sourceFileOrBundle : undefined;
+            var sourceFile = sourceFileOrBundle.kind === 274 ? sourceFileOrBundle : undefined;
             var sourceFiles = bundle ? bundle.sourceFiles : [sourceFile];
             mapRecorder.initialize(jsFilePath, sourceMapFilePath || "", sourceFileOrBundle, sourceMapDataList);
             if (bundle) {
@@ -77236,20 +62120,16 @@ var ts;
             writer.writeLine();
             var sourceMappingURL = mapRecorder.getSourceMappingURL();
             if (sourceMappingURL) {
-                writer.write("//# " + "sourceMappingURL" + "=" + sourceMappingURL); // Sometimes tools can sometimes see this line as a source mapping url comment
+                writer.write("//# " + "sourceMappingURL" + "=" + sourceMappingURL);
             }
-            // Write the source map
             if (sourceMapFilePath) {
-                ts.writeFile(host, emitterDiagnostics, sourceMapFilePath, mapRecorder.getText(), /*writeByteOrderMark*/ false, sourceFiles);
+                ts.writeFile(host, emitterDiagnostics, sourceMapFilePath, mapRecorder.getText(), false, sourceFiles);
             }
-            // Write the output file
             ts.writeFile(host, emitterDiagnostics, jsFilePath, writer.getText(), !!compilerOptions.emitBOM, sourceFiles);
-            // Write bundled offset information if applicable
             if (bundleInfoPath) {
                 bundleInfo.totalLength = writer.getTextPos();
-                ts.writeFile(host, emitterDiagnostics, bundleInfoPath, JSON.stringify(bundleInfo, undefined, 2), /*writeByteOrderMark*/ false);
+                ts.writeFile(host, emitterDiagnostics, bundleInfoPath, JSON.stringify(bundleInfo, undefined, 2), false);
             }
-            // Reset state
             mapRecorder.reset();
             writer.clear();
             bundleInfo = createDefaultBundleInfo();
@@ -77262,13 +62142,6 @@ var ts;
         }
     }
     ts.emitFiles = emitFiles;
-    var PipelinePhase;
-    (function (PipelinePhase) {
-        PipelinePhase[PipelinePhase["Notification"] = 0] = "Notification";
-        PipelinePhase[PipelinePhase["Comments"] = 1] = "Comments";
-        PipelinePhase[PipelinePhase["SourceMaps"] = 2] = "SourceMaps";
-        PipelinePhase[PipelinePhase["Emit"] = 3] = "Emit";
-    })(PipelinePhase || (PipelinePhase = {}));
     function createPrinter(printerOptions, handlers) {
         if (printerOptions === void 0) { printerOptions = {}; }
         if (handlers === void 0) { handlers = {}; }
@@ -77277,13 +62150,13 @@ var ts;
         var comments = ts.createCommentWriter(printerOptions, onEmitSourceMapOfPosition);
         var emitNodeWithComments = comments.emitNodeWithComments, emitBodyWithDetachedComments = comments.emitBodyWithDetachedComments, emitTrailingCommentsOfPosition = comments.emitTrailingCommentsOfPosition, emitLeadingCommentsOfPosition = comments.emitLeadingCommentsOfPosition;
         var currentSourceFile;
-        var nodeIdToGeneratedName; // Map of generated names for specific nodes.
-        var autoGeneratedIdToGeneratedName; // Map of generated names for temp and loop variables.
-        var generatedNames; // Set of names generated by the NameGenerator.
-        var tempFlagsStack; // Stack of enclosing name generation scopes.
-        var tempFlags; // TempFlags for the current name generation scope.
-        var reservedNamesStack; // Stack of TempFlags reserved in enclosing name generation scopes.
-        var reservedNames; // TempFlags to reserve in nested name generation scopes.
+        var nodeIdToGeneratedName;
+        var autoGeneratedIdToGeneratedName;
+        var generatedNames;
+        var tempFlagsStack;
+        var tempFlags;
+        var reservedNamesStack;
+        var reservedNames;
         var writer;
         var ownWriter;
         var write = writeBase;
@@ -77300,12 +62173,10 @@ var ts;
         var isOwnFileEmit;
         reset();
         return {
-            // public API
             printNode: printNode,
             printList: printList,
             printFile: printFile,
             printBundle: printBundle,
-            // internal API
             writeNode: writeNode,
             writeList: writeList,
             writeFile: writeFile,
@@ -77313,20 +62184,20 @@ var ts;
         };
         function printNode(hint, node, sourceFile) {
             switch (hint) {
-                case 0 /* SourceFile */:
+                case 0:
                     ts.Debug.assert(ts.isSourceFile(node), "Expected a SourceFile node.");
                     break;
-                case 2 /* IdentifierName */:
+                case 2:
                     ts.Debug.assert(ts.isIdentifier(node), "Expected an Identifier node.");
                     break;
-                case 1 /* Expression */:
+                case 1:
                     ts.Debug.assert(ts.isExpression(node), "Expected an Expression node.");
                     break;
             }
             switch (node.kind) {
-                case 274 /* SourceFile */: return printFile(node);
-                case 275 /* Bundle */: return printBundle(node);
-                case 276 /* UnparsedSource */: return printUnparsedSource(node);
+                case 274: return printFile(node);
+                case 275: return printBundle(node);
+                case 276: return printUnparsedSource(node);
             }
             writeNode(hint, node, sourceFile, beginPrint());
             return endPrint();
@@ -77374,7 +62245,7 @@ var ts;
             emitSyntheticTripleSlashReferencesIfNeeded(bundle);
             for (var _a = 0, _b = bundle.prepends; _a < _b.length; _a++) {
                 var prepend = _b[_a];
-                print(4 /* Unspecified */, prepend, /*sourceFile*/ undefined);
+                print(4, prepend, undefined);
                 writeLine();
             }
             if (bundleInfo) {
@@ -77382,7 +62253,7 @@ var ts;
             }
             for (var _c = 0, _d = bundle.sourceFiles; _c < _d.length; _c++) {
                 var sourceFile = _d[_c];
-                print(0 /* SourceFile */, sourceFile, sourceFile);
+                print(0, sourceFile, sourceFile);
             }
             reset();
             writer = previousWriter;
@@ -77390,7 +62261,7 @@ var ts;
         function writeUnparsedSource(unparsed, output) {
             var previousWriter = writer;
             setWriter(output);
-            print(4 /* Unspecified */, unparsed, /*sourceFile*/ undefined);
+            print(4, unparsed, undefined);
             reset();
             writer = previousWriter;
         }
@@ -77400,7 +62271,7 @@ var ts;
             setWriter(output);
             emitShebangIfNeeded(sourceFile);
             emitPrologueDirectivesIfNeeded(sourceFile);
-            print(0 /* SourceFile */, sourceFile, sourceFile);
+            print(0, sourceFile, sourceFile);
             reset();
             writer = previousWriter;
         }
@@ -77416,7 +62287,7 @@ var ts;
             if (sourceFile) {
                 setSourceFile(sourceFile);
             }
-            var pipelinePhase = getPipelinePhase(0 /* Notification */, hint);
+            var pipelinePhase = getPipelinePhase(0, hint);
             pipelinePhase(hint, node);
         }
         function setSourceFile(sourceFile) {
@@ -77427,7 +62298,7 @@ var ts;
             }
         }
         function setWriter(output) {
-            writer = output; // TODO: GH#18217
+            writer = output;
             comments.setWriter(output);
         }
         function reset() {
@@ -77435,47 +62306,45 @@ var ts;
             autoGeneratedIdToGeneratedName = [];
             generatedNames = ts.createMap();
             tempFlagsStack = [];
-            tempFlags = 0 /* Auto */;
+            tempFlags = 0;
             reservedNamesStack = [];
             comments.reset();
-            setWriter(/*output*/ undefined);
+            setWriter(undefined);
         }
         function emit(node) {
             if (!node)
                 return;
-            var pipelinePhase = getPipelinePhase(0 /* Notification */, 4 /* Unspecified */);
-            pipelinePhase(4 /* Unspecified */, node);
+            var pipelinePhase = getPipelinePhase(0, 4);
+            pipelinePhase(4, node);
         }
         function emitIdentifierName(node) {
             if (!node)
                 return;
-            var pipelinePhase = getPipelinePhase(0 /* Notification */, 2 /* IdentifierName */);
-            pipelinePhase(2 /* IdentifierName */, node);
+            var pipelinePhase = getPipelinePhase(0, 2);
+            pipelinePhase(2, node);
         }
         function emitExpression(node) {
             if (!node)
                 return;
-            var pipelinePhase = getPipelinePhase(0 /* Notification */, 1 /* Expression */);
-            pipelinePhase(1 /* Expression */, node);
+            var pipelinePhase = getPipelinePhase(0, 1);
+            pipelinePhase(1, node);
         }
         function getPipelinePhase(phase, hint) {
             switch (phase) {
-                case 0 /* Notification */:
+                case 0:
                     if (onEmitNode) {
                         return pipelineEmitWithNotification;
                     }
-                // falls through
-                case 1 /* Comments */:
-                    if (emitNodeWithComments && hint !== 0 /* SourceFile */) {
+                case 1:
+                    if (emitNodeWithComments && hint !== 0) {
                         return pipelineEmitWithComments;
                     }
                     return pipelineEmitWithoutComments;
-                case 2 /* SourceMaps */:
-                    if (onEmitSourceMapOfNode && hint !== 0 /* SourceFile */ && hint !== 2 /* IdentifierName */) {
+                case 2:
+                    if (onEmitSourceMapOfNode && hint !== 0 && hint !== 2) {
                         return pipelineEmitWithSourceMap;
                     }
-                // falls through
-                case 3 /* Emit */:
+                case 3:
                     return pipelineEmitWithHint;
                 default:
                     return ts.Debug.assertNever(phase, "Unexpected value for PipelinePhase: " + phase);
@@ -77485,365 +62354,341 @@ var ts;
             return getPipelinePhase(currentPhase + 1, hint);
         }
         function pipelineEmitWithNotification(hint, node) {
-            ts.Debug.assertDefined(onEmitNode)(hint, node, getNextPipelinePhase(0 /* Notification */, hint));
+            ts.Debug.assertDefined(onEmitNode)(hint, node, getNextPipelinePhase(0, hint));
         }
         function pipelineEmitWithComments(hint, node) {
             ts.Debug.assertDefined(emitNodeWithComments);
-            ts.Debug.assert(hint !== 0 /* SourceFile */);
-            emitNodeWithComments(hint, trySubstituteNode(hint, node), getNextPipelinePhase(1 /* Comments */, hint));
+            ts.Debug.assert(hint !== 0);
+            emitNodeWithComments(hint, trySubstituteNode(hint, node), getNextPipelinePhase(1, hint));
         }
         function pipelineEmitWithoutComments(hint, node) {
-            var pipelinePhase = getNextPipelinePhase(1 /* Comments */, hint);
+            var pipelinePhase = getNextPipelinePhase(1, hint);
             pipelinePhase(hint, trySubstituteNode(hint, node));
         }
         function pipelineEmitWithSourceMap(hint, node) {
-            ts.Debug.assert(hint !== 0 /* SourceFile */ && hint !== 2 /* IdentifierName */);
+            ts.Debug.assert(hint !== 0 && hint !== 2);
             ts.Debug.assertDefined(onEmitSourceMapOfNode)(hint, node, pipelineEmitWithHint);
         }
         function pipelineEmitWithHint(hint, node) {
-            if (hint === 0 /* SourceFile */)
+            if (hint === 0)
                 return emitSourceFile(ts.cast(node, ts.isSourceFile));
-            if (hint === 2 /* IdentifierName */)
+            if (hint === 2)
                 return emitIdentifier(ts.cast(node, ts.isIdentifier));
-            if (hint === 3 /* MappedTypeParameter */)
+            if (hint === 3)
                 return emitMappedTypeParameter(ts.cast(node, ts.isTypeParameterDeclaration));
-            if (hint === 4 /* Unspecified */) {
+            if (hint === 4) {
                 if (ts.isKeyword(node.kind))
                     return writeTokenNode(node, writeKeyword);
                 switch (node.kind) {
-                    // Pseudo-literals
-                    case 14 /* TemplateHead */:
-                    case 15 /* TemplateMiddle */:
-                    case 16 /* TemplateTail */:
+                    case 14:
+                    case 15:
+                    case 16:
                         return emitLiteral(node);
-                    case 276 /* UnparsedSource */:
+                    case 276:
                         return emitUnparsedSource(node);
-                    // Identifiers
-                    case 71 /* Identifier */:
+                    case 71:
                         return emitIdentifier(node);
-                    // Parse tree nodes
-                    // Names
-                    case 146 /* QualifiedName */:
+                    case 146:
                         return emitQualifiedName(node);
-                    case 147 /* ComputedPropertyName */:
+                    case 147:
                         return emitComputedPropertyName(node);
-                    // Signature elements
-                    case 148 /* TypeParameter */:
+                    case 148:
                         return emitTypeParameter(node);
-                    case 149 /* Parameter */:
+                    case 149:
                         return emitParameter(node);
-                    case 150 /* Decorator */:
+                    case 150:
                         return emitDecorator(node);
-                    // Type members
-                    case 151 /* PropertySignature */:
+                    case 151:
                         return emitPropertySignature(node);
-                    case 152 /* PropertyDeclaration */:
+                    case 152:
                         return emitPropertyDeclaration(node);
-                    case 153 /* MethodSignature */:
+                    case 153:
                         return emitMethodSignature(node);
-                    case 154 /* MethodDeclaration */:
+                    case 154:
                         return emitMethodDeclaration(node);
-                    case 155 /* Constructor */:
+                    case 155:
                         return emitConstructor(node);
-                    case 156 /* GetAccessor */:
-                    case 157 /* SetAccessor */:
+                    case 156:
+                    case 157:
                         return emitAccessorDeclaration(node);
-                    case 158 /* CallSignature */:
+                    case 158:
                         return emitCallSignature(node);
-                    case 159 /* ConstructSignature */:
+                    case 159:
                         return emitConstructSignature(node);
-                    case 160 /* IndexSignature */:
+                    case 160:
                         return emitIndexSignature(node);
-                    // Types
-                    case 161 /* TypePredicate */:
+                    case 161:
                         return emitTypePredicate(node);
-                    case 162 /* TypeReference */:
+                    case 162:
                         return emitTypeReference(node);
-                    case 163 /* FunctionType */:
+                    case 163:
                         return emitFunctionType(node);
-                    case 284 /* JSDocFunctionType */:
+                    case 284:
                         return emitJSDocFunctionType(node);
-                    case 164 /* ConstructorType */:
+                    case 164:
                         return emitConstructorType(node);
-                    case 165 /* TypeQuery */:
+                    case 165:
                         return emitTypeQuery(node);
-                    case 166 /* TypeLiteral */:
+                    case 166:
                         return emitTypeLiteral(node);
-                    case 167 /* ArrayType */:
+                    case 167:
                         return emitArrayType(node);
-                    case 168 /* TupleType */:
+                    case 168:
                         return emitTupleType(node);
-                    case 169 /* UnionType */:
+                    case 169:
                         return emitUnionType(node);
-                    case 170 /* IntersectionType */:
+                    case 170:
                         return emitIntersectionType(node);
-                    case 171 /* ConditionalType */:
+                    case 171:
                         return emitConditionalType(node);
-                    case 172 /* InferType */:
+                    case 172:
                         return emitInferType(node);
-                    case 173 /* ParenthesizedType */:
+                    case 173:
                         return emitParenthesizedType(node);
-                    case 207 /* ExpressionWithTypeArguments */:
+                    case 207:
                         return emitExpressionWithTypeArguments(node);
-                    case 174 /* ThisType */:
+                    case 174:
                         return emitThisType();
-                    case 175 /* TypeOperator */:
+                    case 175:
                         return emitTypeOperator(node);
-                    case 176 /* IndexedAccessType */:
+                    case 176:
                         return emitIndexedAccessType(node);
-                    case 177 /* MappedType */:
+                    case 177:
                         return emitMappedType(node);
-                    case 178 /* LiteralType */:
+                    case 178:
                         return emitLiteralType(node);
-                    case 179 /* ImportType */:
+                    case 179:
                         return emitImportTypeNode(node);
-                    case 279 /* JSDocAllType */:
+                    case 279:
                         write("*");
                         return;
-                    case 280 /* JSDocUnknownType */:
+                    case 280:
                         write("?");
                         return;
-                    case 281 /* JSDocNullableType */:
+                    case 281:
                         return emitJSDocNullableType(node);
-                    case 282 /* JSDocNonNullableType */:
+                    case 282:
                         return emitJSDocNonNullableType(node);
-                    case 283 /* JSDocOptionalType */:
+                    case 283:
                         return emitJSDocOptionalType(node);
-                    case 285 /* JSDocVariadicType */:
+                    case 285:
                         return emitJSDocVariadicType(node);
-                    // Binding patterns
-                    case 180 /* ObjectBindingPattern */:
+                    case 180:
                         return emitObjectBindingPattern(node);
-                    case 181 /* ArrayBindingPattern */:
+                    case 181:
                         return emitArrayBindingPattern(node);
-                    case 182 /* BindingElement */:
+                    case 182:
                         return emitBindingElement(node);
-                    // Misc
-                    case 211 /* TemplateSpan */:
+                    case 211:
                         return emitTemplateSpan(node);
-                    case 212 /* SemicolonClassElement */:
+                    case 212:
                         return emitSemicolonClassElement();
-                    // Statements
-                    case 213 /* Block */:
+                    case 213:
                         return emitBlock(node);
-                    case 214 /* VariableStatement */:
+                    case 214:
                         return emitVariableStatement(node);
-                    case 215 /* EmptyStatement */:
+                    case 215:
                         return emitEmptyStatement();
-                    case 216 /* ExpressionStatement */:
+                    case 216:
                         return emitExpressionStatement(node);
-                    case 217 /* IfStatement */:
+                    case 217:
                         return emitIfStatement(node);
-                    case 218 /* DoStatement */:
+                    case 218:
                         return emitDoStatement(node);
-                    case 219 /* WhileStatement */:
+                    case 219:
                         return emitWhileStatement(node);
-                    case 220 /* ForStatement */:
+                    case 220:
                         return emitForStatement(node);
-                    case 221 /* ForInStatement */:
+                    case 221:
                         return emitForInStatement(node);
-                    case 222 /* ForOfStatement */:
+                    case 222:
                         return emitForOfStatement(node);
-                    case 223 /* ContinueStatement */:
+                    case 223:
                         return emitContinueStatement(node);
-                    case 224 /* BreakStatement */:
+                    case 224:
                         return emitBreakStatement(node);
-                    case 225 /* ReturnStatement */:
+                    case 225:
                         return emitReturnStatement(node);
-                    case 226 /* WithStatement */:
+                    case 226:
                         return emitWithStatement(node);
-                    case 227 /* SwitchStatement */:
+                    case 227:
                         return emitSwitchStatement(node);
-                    case 228 /* LabeledStatement */:
+                    case 228:
                         return emitLabeledStatement(node);
-                    case 229 /* ThrowStatement */:
+                    case 229:
                         return emitThrowStatement(node);
-                    case 230 /* TryStatement */:
+                    case 230:
                         return emitTryStatement(node);
-                    case 231 /* DebuggerStatement */:
+                    case 231:
                         return emitDebuggerStatement(node);
-                    // Declarations
-                    case 232 /* VariableDeclaration */:
+                    case 232:
                         return emitVariableDeclaration(node);
-                    case 233 /* VariableDeclarationList */:
+                    case 233:
                         return emitVariableDeclarationList(node);
-                    case 234 /* FunctionDeclaration */:
+                    case 234:
                         return emitFunctionDeclaration(node);
-                    case 235 /* ClassDeclaration */:
+                    case 235:
                         return emitClassDeclaration(node);
-                    case 236 /* InterfaceDeclaration */:
+                    case 236:
                         return emitInterfaceDeclaration(node);
-                    case 237 /* TypeAliasDeclaration */:
+                    case 237:
                         return emitTypeAliasDeclaration(node);
-                    case 238 /* EnumDeclaration */:
+                    case 238:
                         return emitEnumDeclaration(node);
-                    case 239 /* ModuleDeclaration */:
+                    case 239:
                         return emitModuleDeclaration(node);
-                    case 240 /* ModuleBlock */:
+                    case 240:
                         return emitModuleBlock(node);
-                    case 241 /* CaseBlock */:
+                    case 241:
                         return emitCaseBlock(node);
-                    case 242 /* NamespaceExportDeclaration */:
+                    case 242:
                         return emitNamespaceExportDeclaration(node);
-                    case 243 /* ImportEqualsDeclaration */:
+                    case 243:
                         return emitImportEqualsDeclaration(node);
-                    case 244 /* ImportDeclaration */:
+                    case 244:
                         return emitImportDeclaration(node);
-                    case 245 /* ImportClause */:
+                    case 245:
                         return emitImportClause(node);
-                    case 246 /* NamespaceImport */:
+                    case 246:
                         return emitNamespaceImport(node);
-                    case 247 /* NamedImports */:
+                    case 247:
                         return emitNamedImports(node);
-                    case 248 /* ImportSpecifier */:
+                    case 248:
                         return emitImportSpecifier(node);
-                    case 249 /* ExportAssignment */:
+                    case 249:
                         return emitExportAssignment(node);
-                    case 250 /* ExportDeclaration */:
+                    case 250:
                         return emitExportDeclaration(node);
-                    case 251 /* NamedExports */:
+                    case 251:
                         return emitNamedExports(node);
-                    case 252 /* ExportSpecifier */:
+                    case 252:
                         return emitExportSpecifier(node);
-                    case 253 /* MissingDeclaration */:
+                    case 253:
                         return;
-                    // Module references
-                    case 254 /* ExternalModuleReference */:
+                    case 254:
                         return emitExternalModuleReference(node);
-                    // JSX (non-expression)
-                    case 10 /* JsxText */:
+                    case 10:
                         return emitJsxText(node);
-                    case 257 /* JsxOpeningElement */:
-                    case 260 /* JsxOpeningFragment */:
+                    case 257:
+                    case 260:
                         return emitJsxOpeningElementOrFragment(node);
-                    case 258 /* JsxClosingElement */:
-                    case 261 /* JsxClosingFragment */:
+                    case 258:
+                    case 261:
                         return emitJsxClosingElementOrFragment(node);
-                    case 262 /* JsxAttribute */:
+                    case 262:
                         return emitJsxAttribute(node);
-                    case 263 /* JsxAttributes */:
+                    case 263:
                         return emitJsxAttributes(node);
-                    case 264 /* JsxSpreadAttribute */:
+                    case 264:
                         return emitJsxSpreadAttribute(node);
-                    case 265 /* JsxExpression */:
+                    case 265:
                         return emitJsxExpression(node);
-                    // Clauses
-                    case 266 /* CaseClause */:
+                    case 266:
                         return emitCaseClause(node);
-                    case 267 /* DefaultClause */:
+                    case 267:
                         return emitDefaultClause(node);
-                    case 268 /* HeritageClause */:
+                    case 268:
                         return emitHeritageClause(node);
-                    case 269 /* CatchClause */:
+                    case 269:
                         return emitCatchClause(node);
-                    // Property assignments
-                    case 270 /* PropertyAssignment */:
+                    case 270:
                         return emitPropertyAssignment(node);
-                    case 271 /* ShorthandPropertyAssignment */:
+                    case 271:
                         return emitShorthandPropertyAssignment(node);
-                    case 272 /* SpreadAssignment */:
+                    case 272:
                         return emitSpreadAssignment(node);
-                    // Enum
-                    case 273 /* EnumMember */:
+                    case 273:
                         return emitEnumMember(node);
-                    // JSDoc nodes (ignored)
-                    // Transformation nodes (ignored)
                 }
                 if (ts.isExpression(node)) {
-                    hint = 1 /* Expression */;
-                    node = trySubstituteNode(1 /* Expression */, node);
+                    hint = 1;
+                    node = trySubstituteNode(1, node);
                 }
                 else if (ts.isToken(node)) {
                     return writeTokenNode(node, writePunctuation);
                 }
             }
-            if (hint === 1 /* Expression */) {
+            if (hint === 1) {
                 switch (node.kind) {
-                    // Literals
-                    case 8 /* NumericLiteral */:
+                    case 8:
                         return emitNumericLiteral(node);
-                    case 9 /* StringLiteral */:
-                    case 12 /* RegularExpressionLiteral */:
-                    case 13 /* NoSubstitutionTemplateLiteral */:
+                    case 9:
+                    case 12:
+                    case 13:
                         return emitLiteral(node);
-                    // Identifiers
-                    case 71 /* Identifier */:
+                    case 71:
                         return emitIdentifier(node);
-                    // Reserved words
-                    case 86 /* FalseKeyword */:
-                    case 95 /* NullKeyword */:
-                    case 97 /* SuperKeyword */:
-                    case 101 /* TrueKeyword */:
-                    case 99 /* ThisKeyword */:
-                    case 91 /* ImportKeyword */:
+                    case 86:
+                    case 95:
+                    case 97:
+                    case 101:
+                    case 99:
+                    case 91:
                         writeTokenNode(node, writeKeyword);
                         return;
-                    // Expressions
-                    case 183 /* ArrayLiteralExpression */:
+                    case 183:
                         return emitArrayLiteralExpression(node);
-                    case 184 /* ObjectLiteralExpression */:
+                    case 184:
                         return emitObjectLiteralExpression(node);
-                    case 185 /* PropertyAccessExpression */:
+                    case 185:
                         return emitPropertyAccessExpression(node);
-                    case 186 /* ElementAccessExpression */:
+                    case 186:
                         return emitElementAccessExpression(node);
-                    case 187 /* CallExpression */:
+                    case 187:
                         return emitCallExpression(node);
-                    case 188 /* NewExpression */:
+                    case 188:
                         return emitNewExpression(node);
-                    case 189 /* TaggedTemplateExpression */:
+                    case 189:
                         return emitTaggedTemplateExpression(node);
-                    case 190 /* TypeAssertionExpression */:
+                    case 190:
                         return emitTypeAssertionExpression(node);
-                    case 191 /* ParenthesizedExpression */:
+                    case 191:
                         return emitParenthesizedExpression(node);
-                    case 192 /* FunctionExpression */:
+                    case 192:
                         return emitFunctionExpression(node);
-                    case 193 /* ArrowFunction */:
+                    case 193:
                         return emitArrowFunction(node);
-                    case 194 /* DeleteExpression */:
+                    case 194:
                         return emitDeleteExpression(node);
-                    case 195 /* TypeOfExpression */:
+                    case 195:
                         return emitTypeOfExpression(node);
-                    case 196 /* VoidExpression */:
+                    case 196:
                         return emitVoidExpression(node);
-                    case 197 /* AwaitExpression */:
+                    case 197:
                         return emitAwaitExpression(node);
-                    case 198 /* PrefixUnaryExpression */:
+                    case 198:
                         return emitPrefixUnaryExpression(node);
-                    case 199 /* PostfixUnaryExpression */:
+                    case 199:
                         return emitPostfixUnaryExpression(node);
-                    case 200 /* BinaryExpression */:
+                    case 200:
                         return emitBinaryExpression(node);
-                    case 201 /* ConditionalExpression */:
+                    case 201:
                         return emitConditionalExpression(node);
-                    case 202 /* TemplateExpression */:
+                    case 202:
                         return emitTemplateExpression(node);
-                    case 203 /* YieldExpression */:
+                    case 203:
                         return emitYieldExpression(node);
-                    case 204 /* SpreadElement */:
+                    case 204:
                         return emitSpreadExpression(node);
-                    case 205 /* ClassExpression */:
+                    case 205:
                         return emitClassExpression(node);
-                    case 206 /* OmittedExpression */:
+                    case 206:
                         return;
-                    case 208 /* AsExpression */:
+                    case 208:
                         return emitAsExpression(node);
-                    case 209 /* NonNullExpression */:
+                    case 209:
                         return emitNonNullExpression(node);
-                    case 210 /* MetaProperty */:
+                    case 210:
                         return emitMetaProperty(node);
-                    // JSX
-                    case 255 /* JsxElement */:
+                    case 255:
                         return emitJsxElement(node);
-                    case 256 /* JsxSelfClosingElement */:
+                    case 256:
                         return emitJsxSelfClosingElement(node);
-                    case 259 /* JsxFragment */:
+                    case 259:
                         return emitJsxFragment(node);
-                    // Transformation nodes
-                    case 301 /* PartiallyEmittedExpression */:
+                    case 301:
                         return emitPartiallyEmittedExpression(node);
-                    case 302 /* CommaListExpression */:
+                    case 302:
                         return emitCommaList(node);
                 }
             }
@@ -77860,7 +62705,7 @@ var ts;
         }
         function emitHelpers(node) {
             var helpersEmitted = false;
-            var bundle = node.kind === 275 /* Bundle */ ? node : undefined;
+            var bundle = node.kind === 275 ? node : undefined;
             if (bundle && moduleKind === ts.ModuleKind.None) {
                 return;
             }
@@ -77875,13 +62720,8 @@ var ts;
                     for (var _a = 0, _b = ts.stableSort(helpers, ts.compareEmitHelpers); _a < _b.length; _a++) {
                         var helper = _b[_a];
                         if (!helper.scoped) {
-                            // Skip the helper if it can be skipped and the noEmitHelpers compiler
-                            // option is set, or if it can be imported and the importHelpers compiler
-                            // option is set.
                             if (shouldSkip)
                                 continue;
-                            // Skip the helper if it can be bundled but hasn't already been emitted and we
-                            // are emitting a bundled module.
                             if (shouldBundle) {
                                 if (bundledHelpers.get(helper.name)) {
                                     continue;
@@ -77890,7 +62730,6 @@ var ts;
                             }
                         }
                         else if (bundle) {
-                            // Skip the helper if it is scoped and we are emitting bundled helpers
                             continue;
                         }
                         if (typeof helper.text === "string") {
@@ -77905,52 +62744,34 @@ var ts;
             }
             return helpersEmitted;
         }
-        //
-        // Literals/Pseudo-literals
-        //
-        // SyntaxKind.NumericLiteral
         function emitNumericLiteral(node) {
             emitLiteral(node);
         }
-        // SyntaxKind.StringLiteral
-        // SyntaxKind.RegularExpressionLiteral
-        // SyntaxKind.NoSubstitutionTemplateLiteral
-        // SyntaxKind.TemplateHead
-        // SyntaxKind.TemplateMiddle
-        // SyntaxKind.TemplateTail
         function emitLiteral(node) {
             var text = getLiteralTextOfNode(node);
             if ((printerOptions.sourceMap || printerOptions.inlineSourceMap)
-                && (node.kind === 9 /* StringLiteral */ || ts.isTemplateLiteralKind(node.kind))) {
+                && (node.kind === 9 || ts.isTemplateLiteralKind(node.kind))) {
                 writeLiteral(text);
             }
             else {
-                // Quick info expects all literals to be called with writeStringLiteral, as there's no specific type for numberLiterals
                 writeStringLiteral(text);
             }
         }
-        // SyntaxKind.UnparsedSource
         function emitUnparsedSource(unparsed) {
             writer.rawWrite(unparsed.text);
         }
-        //
-        // Identifiers
-        //
         function emitIdentifier(node) {
             var writeText = node.symbol ? writeSymbol : write;
-            writeText(getTextOfNode(node, /*includeTrivia*/ false), node.symbol);
-            emitList(node, node.typeArguments, 26896 /* TypeParameters */); // Call emitList directly since it could be an array of TypeParameterDeclarations _or_ type arguments
+            writeText(getTextOfNode(node, false), node.symbol);
+            emitList(node, node.typeArguments, 26896);
         }
-        //
-        // Names
-        //
         function emitQualifiedName(node) {
             emitEntityName(node.left);
             writePunctuation(".");
             emit(node.right);
         }
         function emitEntityName(node) {
-            if (node.kind === 71 /* Identifier */) {
+            if (node.kind === 71) {
                 emitExpression(node);
             }
             else {
@@ -77962,9 +62783,6 @@ var ts;
             emitExpression(node.expression);
             writePunctuation("]");
         }
-        //
-        // Signature elements
-        //
         function emitTypeParameter(node) {
             emit(node.name);
             if (node.constraint) {
@@ -77986,22 +62804,18 @@ var ts;
             emit(node.dotDotDotToken);
             emitNodeWithWriter(node.name, writeParameter);
             emit(node.questionToken);
-            if (node.parent && node.parent.kind === 284 /* JSDocFunctionType */ && !node.name) {
+            if (node.parent && node.parent.kind === 284 && !node.name) {
                 emit(node.type);
             }
             else {
                 emitTypeAnnotation(node.type);
             }
-            // The comment position has to fallback to any present node within the parameterdeclaration because as it turns out, the parser can make parameter declarations with _just_ an initializer.
             emitInitializer(node.initializer, node.type ? node.type.end : node.questionToken ? node.questionToken.end : node.name ? node.name.end : node.modifiers ? node.modifiers.end : node.decorators ? node.decorators.end : node.pos, node);
         }
         function emitDecorator(decorator) {
             writePunctuation("@");
             emitExpression(decorator.expression);
         }
-        //
-        // Type members
-        //
         function emitPropertySignature(node) {
             emitDecorators(node, node.decorators);
             emitModifiers(node, node.modifiers);
@@ -78048,7 +62862,7 @@ var ts;
         function emitAccessorDeclaration(node) {
             emitDecorators(node, node.decorators);
             emitModifiers(node, node.modifiers);
-            writeKeyword(node.kind === 156 /* GetAccessor */ ? "get" : "set");
+            writeKeyword(node.kind === 156 ? "get" : "set");
             writeSpace();
             emit(node.name);
             emitSignatureAndBody(node, emitSignatureHead);
@@ -78085,9 +62899,6 @@ var ts;
         function emitSemicolonClassElement() {
             writeSemicolon();
         }
-        //
-        // Types
-        //
         function emitTypePredicate(node) {
             emit(node.parameterName);
             writeSpace();
@@ -78146,8 +62957,8 @@ var ts;
         }
         function emitTypeLiteral(node) {
             writePunctuation("{");
-            var flags = ts.getEmitFlags(node) & 1 /* SingleLine */ ? 384 /* SingleLineTypeLiteralMembers */ : 16449 /* MultiLineTypeLiteralMembers */;
-            emitList(node, node.members, flags | 262144 /* NoSpaceIfEmpty */);
+            var flags = ts.getEmitFlags(node) & 1 ? 384 : 16449;
+            emitList(node, node.members, flags | 262144);
             writePunctuation("}");
         }
         function emitArrayType(node) {
@@ -78161,14 +62972,14 @@ var ts;
         }
         function emitTupleType(node) {
             writePunctuation("[");
-            emitList(node, node.elementTypes, 272 /* TupleTypeElements */);
+            emitList(node, node.elementTypes, 272);
             writePunctuation("]");
         }
         function emitUnionType(node) {
-            emitList(node, node.types, 260 /* UnionTypeConstituents */);
+            emitList(node, node.types, 260);
         }
         function emitIntersectionType(node) {
-            emitList(node, node.types, 264 /* IntersectionTypeConstituents */);
+            emitList(node, node.types, 264);
         }
         function emitConditionalType(node) {
             emit(node.checkType);
@@ -78212,7 +63023,7 @@ var ts;
         function emitMappedType(node) {
             var emitFlags = ts.getEmitFlags(node);
             writePunctuation("{");
-            if (emitFlags & 1 /* SingleLine */) {
+            if (emitFlags & 1) {
                 writeSpace();
             }
             else {
@@ -78221,18 +63032,18 @@ var ts;
             }
             if (node.readonlyToken) {
                 emit(node.readonlyToken);
-                if (node.readonlyToken.kind !== 132 /* ReadonlyKeyword */) {
+                if (node.readonlyToken.kind !== 132) {
                     writeKeyword("readonly");
                 }
                 writeSpace();
             }
             writePunctuation("[");
-            var pipelinePhase = getPipelinePhase(0 /* Notification */, 3 /* MappedTypeParameter */);
-            pipelinePhase(3 /* MappedTypeParameter */, node.typeParameter);
+            var pipelinePhase = getPipelinePhase(0, 3);
+            pipelinePhase(3, node.typeParameter);
             writePunctuation("]");
             if (node.questionToken) {
                 emit(node.questionToken);
-                if (node.questionToken.kind !== 55 /* QuestionToken */) {
+                if (node.questionToken.kind !== 55) {
                     writePunctuation("?");
                 }
             }
@@ -78240,7 +63051,7 @@ var ts;
             writeSpace();
             emit(node.type);
             writeSemicolon();
-            if (emitFlags & 1 /* SingleLine */) {
+            if (emitFlags & 1) {
                 writeSpace();
             }
             else {
@@ -78267,17 +63078,14 @@ var ts;
             }
             emitTypeArguments(node, node.typeArguments);
         }
-        //
-        // Binding patterns
-        //
         function emitObjectBindingPattern(node) {
             writePunctuation("{");
-            emitList(node, node.elements, 262576 /* ObjectBindingPatternElements */);
+            emitList(node, node.elements, 262576);
             writePunctuation("}");
         }
         function emitArrayBindingPattern(node) {
             writePunctuation("[");
-            emitList(node, node.elements, 262448 /* ArrayBindingPatternElements */);
+            emitList(node, node.elements, 262448);
             writePunctuation("]");
         }
         function emitBindingElement(node) {
@@ -78290,23 +63098,20 @@ var ts;
             emit(node.name);
             emitInitializer(node.initializer, node.name.end, node);
         }
-        //
-        // Expressions
-        //
         function emitArrayLiteralExpression(node) {
             var elements = node.elements;
-            var preferNewLine = node.multiLine ? 32768 /* PreferNewLine */ : 0 /* None */;
-            emitExpressionList(node, elements, 4466 /* ArrayLiteralExpressionElements */ | preferNewLine);
+            var preferNewLine = node.multiLine ? 32768 : 0;
+            emitExpressionList(node, elements, 4466 | preferNewLine);
         }
         function emitObjectLiteralExpression(node) {
             ts.forEach(node.properties, generateMemberNames);
-            var indentedFlag = ts.getEmitFlags(node) & 65536 /* Indented */;
+            var indentedFlag = ts.getEmitFlags(node) & 65536;
             if (indentedFlag) {
                 increaseIndent();
             }
-            var preferNewLine = node.multiLine ? 32768 /* PreferNewLine */ : 0 /* None */;
-            var allowTrailingComma = currentSourceFile.languageVersion >= 1 /* ES5 */ && !ts.isJsonSourceFile(currentSourceFile) ? 32 /* AllowTrailingComma */ : 0 /* None */;
-            emitList(node, node.properties, 263122 /* ObjectLiteralExpressionProperties */ | allowTrailingComma | preferNewLine);
+            var preferNewLine = node.multiLine ? 32768 : 0;
+            var allowTrailingComma = currentSourceFile.languageVersion >= 1 && !ts.isJsonSourceFile(currentSourceFile) ? 32 : 0;
+            emitList(node, node.properties, 263122 | allowTrailingComma | preferNewLine);
             if (indentedFlag) {
                 decreaseIndent();
             }
@@ -78314,10 +63119,10 @@ var ts;
         function emitPropertyAccessExpression(node) {
             var indentBeforeDot = false;
             var indentAfterDot = false;
-            if (!(ts.getEmitFlags(node) & 131072 /* NoIndentation */)) {
+            if (!(ts.getEmitFlags(node) & 131072)) {
                 var dotRangeStart = node.expression.end;
                 var dotRangeEnd = ts.skipTrivia(currentSourceFile.text, node.expression.end) + 1;
-                var dotToken = ts.createToken(23 /* DotToken */);
+                var dotToken = ts.createToken(23);
                 dotToken.pos = dotRangeStart;
                 dotToken.end = dotRangeEnd;
                 indentBeforeDot = needsIndentation(node, node.expression, dotToken);
@@ -78329,25 +63134,20 @@ var ts;
             if (shouldEmitDotDot) {
                 writePunctuation(".");
             }
-            emitTokenWithComment(23 /* DotToken */, node.expression.end, writePunctuation, node);
+            emitTokenWithComment(23, node.expression.end, writePunctuation, node);
             increaseIndentIf(indentAfterDot);
             emit(node.name);
             decreaseIndentIf(indentBeforeDot, indentAfterDot);
         }
-        // 1..toString is a valid property access, emit a dot after the literal
-        // Also emit a dot if expression is a integer const enum value - it will appear in generated code as numeric literal
         function needsDotDotForPropertyAccess(expression) {
             expression = ts.skipPartiallyEmittedExpressions(expression);
             if (ts.isNumericLiteral(expression)) {
-                // check if numeric literal is a decimal literal that was originally written with a dot
                 var text = getLiteralTextOfNode(expression);
                 return !expression.numericLiteralFlags
-                    && !ts.stringContains(text, ts.tokenToString(23 /* DotToken */));
+                    && !ts.stringContains(text, ts.tokenToString(23));
             }
             else if (ts.isPropertyAccessExpression(expression) || ts.isElementAccessExpression(expression)) {
-                // check if constant enum value is integer
                 var constantValue = ts.getConstantValue(expression);
-                // isFinite handles cases when constantValue is undefined
                 return typeof constantValue === "number" && isFinite(constantValue)
                     && Math.floor(constantValue) === constantValue
                     && printerOptions.removeComments;
@@ -78355,21 +63155,21 @@ var ts;
         }
         function emitElementAccessExpression(node) {
             emitExpression(node.expression);
-            emitTokenWithComment(21 /* OpenBracketToken */, node.expression.end, writePunctuation, node);
+            emitTokenWithComment(21, node.expression.end, writePunctuation, node);
             emitExpression(node.argumentExpression);
-            emitTokenWithComment(22 /* CloseBracketToken */, node.argumentExpression.end, writePunctuation, node);
+            emitTokenWithComment(22, node.argumentExpression.end, writePunctuation, node);
         }
         function emitCallExpression(node) {
             emitExpression(node.expression);
             emitTypeArguments(node, node.typeArguments);
-            emitExpressionList(node, node.arguments, 1296 /* CallExpressionArguments */);
+            emitExpressionList(node, node.arguments, 1296);
         }
         function emitNewExpression(node) {
-            emitTokenWithComment(94 /* NewKeyword */, node.pos, writeKeyword, node);
+            emitTokenWithComment(94, node.pos, writeKeyword, node);
             writeSpace();
             emitExpression(node.expression);
             emitTypeArguments(node, node.typeArguments);
-            emitExpressionList(node, node.arguments, 9488 /* NewExpressionArguments */);
+            emitExpressionList(node, node.arguments, 9488);
         }
         function emitTaggedTemplateExpression(node) {
             emitExpression(node.tag);
@@ -78384,9 +63184,9 @@ var ts;
             emitExpression(node.expression);
         }
         function emitParenthesizedExpression(node) {
-            var openParenPos = emitTokenWithComment(19 /* OpenParenToken */, node.pos, writePunctuation, node);
+            var openParenPos = emitTokenWithComment(19, node.pos, writePunctuation, node);
             emitExpression(node.expression);
-            emitTokenWithComment(20 /* CloseParenToken */, node.expression ? node.expression.end : openParenPos, writePunctuation, node);
+            emitTokenWithComment(20, node.expression ? node.expression.end : openParenPos, writePunctuation, node);
         }
         function emitFunctionExpression(node) {
             generateNameIfNeeded(node.name);
@@ -78405,22 +63205,22 @@ var ts;
             emit(node.equalsGreaterThanToken);
         }
         function emitDeleteExpression(node) {
-            emitTokenWithComment(80 /* DeleteKeyword */, node.pos, writeKeyword, node);
+            emitTokenWithComment(80, node.pos, writeKeyword, node);
             writeSpace();
             emitExpression(node.expression);
         }
         function emitTypeOfExpression(node) {
-            emitTokenWithComment(103 /* TypeOfKeyword */, node.pos, writeKeyword, node);
+            emitTokenWithComment(103, node.pos, writeKeyword, node);
             writeSpace();
             emitExpression(node.expression);
         }
         function emitVoidExpression(node) {
-            emitTokenWithComment(105 /* VoidKeyword */, node.pos, writeKeyword, node);
+            emitTokenWithComment(105, node.pos, writeKeyword, node);
             writeSpace();
             emitExpression(node.expression);
         }
         function emitAwaitExpression(node) {
-            emitTokenWithComment(121 /* AwaitKeyword */, node.pos, writeKeyword, node);
+            emitTokenWithComment(121, node.pos, writeKeyword, node);
             writeSpace();
             emitExpression(node.expression);
         }
@@ -78432,36 +63232,24 @@ var ts;
             emitExpression(node.operand);
         }
         function shouldEmitWhitespaceBeforeOperand(node) {
-            // In some cases, we need to emit a space between the operator and the operand. One obvious case
-            // is when the operator is an identifier, like delete or typeof. We also need to do this for plus
-            // and minus expressions in certain cases. Specifically, consider the following two cases (parens
-            // are just for clarity of exposition, and not part of the source code):
-            //
-            //  (+(+1))
-            //  (+(++1))
-            //
-            // We need to emit a space in both cases. In the first case, the absence of a space will make
-            // the resulting expression a prefix increment operation. And in the second, it will make the resulting
-            // expression a prefix increment whose operand is a plus expression - (++(+x))
-            // The same is true of minus of course.
             var operand = node.operand;
-            return operand.kind === 198 /* PrefixUnaryExpression */
-                && ((node.operator === 37 /* PlusToken */ && (operand.operator === 37 /* PlusToken */ || operand.operator === 43 /* PlusPlusToken */))
-                    || (node.operator === 38 /* MinusToken */ && (operand.operator === 38 /* MinusToken */ || operand.operator === 44 /* MinusMinusToken */)));
+            return operand.kind === 198
+                && ((node.operator === 37 && (operand.operator === 37 || operand.operator === 43))
+                    || (node.operator === 38 && (operand.operator === 38 || operand.operator === 44)));
         }
         function emitPostfixUnaryExpression(node) {
             emitExpression(node.operand);
             writeTokenText(node.operator, writeOperator);
         }
         function emitBinaryExpression(node) {
-            var isCommaOperator = node.operatorToken.kind !== 26 /* CommaToken */;
+            var isCommaOperator = node.operatorToken.kind !== 26;
             var indentBeforeOperator = needsIndentation(node, node.left, node.operatorToken);
             var indentAfterOperator = needsIndentation(node, node.operatorToken, node.right);
             emitExpression(node.left);
             increaseIndentIf(indentBeforeOperator, isCommaOperator ? " " : undefined);
             emitLeadingCommentsOfPosition(node.operatorToken.pos);
             writeTokenNode(node.operatorToken, writeOperator);
-            emitTrailingCommentsOfPosition(node.operatorToken.end, /*prefixSpace*/ true); // Binary operators should have a space before the comment starts
+            emitTrailingCommentsOfPosition(node.operatorToken.end, true);
             increaseIndentIf(indentAfterOperator, " ");
             emitExpression(node.right);
             decreaseIndentIf(indentBeforeOperator, indentAfterOperator);
@@ -78485,10 +63273,10 @@ var ts;
         }
         function emitTemplateExpression(node) {
             emit(node.head);
-            emitList(node, node.templateSpans, 131072 /* TemplateExpressionSpans */);
+            emitList(node, node.templateSpans, 131072);
         }
         function emitYieldExpression(node) {
-            emitTokenWithComment(116 /* YieldKeyword */, node.pos, writeKeyword, node);
+            emitTokenWithComment(116, node.pos, writeKeyword, node);
             emit(node.asteriskToken);
             emitExpressionWithLeadingSpace(node.expression);
         }
@@ -78522,24 +63310,18 @@ var ts;
             writePunctuation(".");
             emit(node.name);
         }
-        //
-        // Misc
-        //
         function emitTemplateSpan(node) {
             emitExpression(node.expression);
             emit(node.literal);
         }
-        //
-        // Statements
-        //
         function emitBlock(node) {
-            emitBlockStatements(node, /*forceSingleLine*/ !node.multiLine && isEmptyBlock(node));
+            emitBlockStatements(node, !node.multiLine && isEmptyBlock(node));
         }
         function emitBlockStatements(node, forceSingleLine) {
-            emitTokenWithComment(17 /* OpenBraceToken */, node.pos, writePunctuation, /*contextNode*/ node);
-            var format = forceSingleLine || ts.getEmitFlags(node) & 1 /* SingleLine */ ? 384 /* SingleLineBlockStatements */ : 65 /* MultiLineBlockStatements */;
+            emitTokenWithComment(17, node.pos, writePunctuation, node);
+            var format = forceSingleLine || ts.getEmitFlags(node) & 1 ? 384 : 65;
             emitList(node, node.statements, format);
-            emitTokenWithComment(18 /* CloseBraceToken */, node.statements.end, writePunctuation, /*contextNode*/ node, /*indentLeading*/ !!(format & 1 /* MultiLine */));
+            emitTokenWithComment(18, node.statements.end, writePunctuation, node, !!(format & 1));
         }
         function emitVariableStatement(node) {
             emitModifiers(node, node.modifiers);
@@ -78556,16 +63338,16 @@ var ts;
             }
         }
         function emitIfStatement(node) {
-            var openParenPos = emitTokenWithComment(90 /* IfKeyword */, node.pos, writeKeyword, node);
+            var openParenPos = emitTokenWithComment(90, node.pos, writeKeyword, node);
             writeSpace();
-            emitTokenWithComment(19 /* OpenParenToken */, openParenPos, writePunctuation, node);
+            emitTokenWithComment(19, openParenPos, writePunctuation, node);
             emitExpression(node.expression);
-            emitTokenWithComment(20 /* CloseParenToken */, node.expression.end, writePunctuation, node);
+            emitTokenWithComment(20, node.expression.end, writePunctuation, node);
             emitEmbeddedStatement(node, node.thenStatement);
             if (node.elseStatement) {
                 writeLineOrSpace(node);
-                emitTokenWithComment(82 /* ElseKeyword */, node.thenStatement.end, writeKeyword, node);
-                if (node.elseStatement.kind === 217 /* IfStatement */) {
+                emitTokenWithComment(82, node.thenStatement.end, writeKeyword, node);
+                if (node.elseStatement.kind === 217) {
                     writeSpace();
                     emit(node.elseStatement);
                 }
@@ -78575,14 +63357,14 @@ var ts;
             }
         }
         function emitWhileClause(node, startPos) {
-            var openParenPos = emitTokenWithComment(106 /* WhileKeyword */, startPos, writeKeyword, node);
+            var openParenPos = emitTokenWithComment(106, startPos, writeKeyword, node);
             writeSpace();
-            emitTokenWithComment(19 /* OpenParenToken */, openParenPos, writePunctuation, node);
+            emitTokenWithComment(19, openParenPos, writePunctuation, node);
             emitExpression(node.expression);
-            emitTokenWithComment(20 /* CloseParenToken */, node.expression.end, writePunctuation, node);
+            emitTokenWithComment(20, node.expression.end, writePunctuation, node);
         }
         function emitDoStatement(node) {
-            emitTokenWithComment(81 /* DoKeyword */, node.pos, writeKeyword, node);
+            emitTokenWithComment(81, node.pos, writeKeyword, node);
             emitEmbeddedStatement(node, node.statement);
             if (ts.isBlock(node.statement)) {
                 writeSpace();
@@ -78598,45 +63380,45 @@ var ts;
             emitEmbeddedStatement(node, node.statement);
         }
         function emitForStatement(node) {
-            var openParenPos = emitTokenWithComment(88 /* ForKeyword */, node.pos, writeKeyword, node);
+            var openParenPos = emitTokenWithComment(88, node.pos, writeKeyword, node);
             writeSpace();
-            var pos = emitTokenWithComment(19 /* OpenParenToken */, openParenPos, writePunctuation, /*contextNode*/ node);
+            var pos = emitTokenWithComment(19, openParenPos, writePunctuation, node);
             emitForBinding(node.initializer);
-            pos = emitTokenWithComment(25 /* SemicolonToken */, node.initializer ? node.initializer.end : pos, writeSemicolon, node);
+            pos = emitTokenWithComment(25, node.initializer ? node.initializer.end : pos, writeSemicolon, node);
             emitExpressionWithLeadingSpace(node.condition);
-            pos = emitTokenWithComment(25 /* SemicolonToken */, node.condition ? node.condition.end : pos, writeSemicolon, node);
+            pos = emitTokenWithComment(25, node.condition ? node.condition.end : pos, writeSemicolon, node);
             emitExpressionWithLeadingSpace(node.incrementor);
-            emitTokenWithComment(20 /* CloseParenToken */, node.incrementor ? node.incrementor.end : pos, writePunctuation, node);
+            emitTokenWithComment(20, node.incrementor ? node.incrementor.end : pos, writePunctuation, node);
             emitEmbeddedStatement(node, node.statement);
         }
         function emitForInStatement(node) {
-            var openParenPos = emitTokenWithComment(88 /* ForKeyword */, node.pos, writeKeyword, node);
+            var openParenPos = emitTokenWithComment(88, node.pos, writeKeyword, node);
             writeSpace();
-            emitTokenWithComment(19 /* OpenParenToken */, openParenPos, writePunctuation, node);
+            emitTokenWithComment(19, openParenPos, writePunctuation, node);
             emitForBinding(node.initializer);
             writeSpace();
-            emitTokenWithComment(92 /* InKeyword */, node.initializer.end, writeKeyword, node);
+            emitTokenWithComment(92, node.initializer.end, writeKeyword, node);
             writeSpace();
             emitExpression(node.expression);
-            emitTokenWithComment(20 /* CloseParenToken */, node.expression.end, writePunctuation, node);
+            emitTokenWithComment(20, node.expression.end, writePunctuation, node);
             emitEmbeddedStatement(node, node.statement);
         }
         function emitForOfStatement(node) {
-            var openParenPos = emitTokenWithComment(88 /* ForKeyword */, node.pos, writeKeyword, node);
+            var openParenPos = emitTokenWithComment(88, node.pos, writeKeyword, node);
             writeSpace();
             emitWithTrailingSpace(node.awaitModifier);
-            emitTokenWithComment(19 /* OpenParenToken */, openParenPos, writePunctuation, node);
+            emitTokenWithComment(19, openParenPos, writePunctuation, node);
             emitForBinding(node.initializer);
             writeSpace();
-            emitTokenWithComment(145 /* OfKeyword */, node.initializer.end, writeKeyword, node);
+            emitTokenWithComment(145, node.initializer.end, writeKeyword, node);
             writeSpace();
             emitExpression(node.expression);
-            emitTokenWithComment(20 /* CloseParenToken */, node.expression.end, writePunctuation, node);
+            emitTokenWithComment(20, node.expression.end, writePunctuation, node);
             emitEmbeddedStatement(node, node.statement);
         }
         function emitForBinding(node) {
             if (node !== undefined) {
-                if (node.kind === 233 /* VariableDeclarationList */) {
+                if (node.kind === 233) {
                     emit(node);
                 }
                 else {
@@ -78645,12 +63427,12 @@ var ts;
             }
         }
         function emitContinueStatement(node) {
-            emitTokenWithComment(77 /* ContinueKeyword */, node.pos, writeKeyword, node);
+            emitTokenWithComment(77, node.pos, writeKeyword, node);
             emitWithLeadingSpace(node.label);
             writeSemicolon();
         }
         function emitBreakStatement(node) {
-            emitTokenWithComment(72 /* BreakKeyword */, node.pos, writeKeyword, node);
+            emitTokenWithComment(72, node.pos, writeKeyword, node);
             emitWithLeadingSpace(node.label);
             writeSemicolon();
         }
@@ -78673,45 +63455,45 @@ var ts;
             }
             pos = writeTokenText(token, writer, pos);
             if (emitTrailingCommentsOfPosition && isSimilarNode && contextNode.end !== pos) {
-                emitTrailingCommentsOfPosition(pos, /*prefixSpace*/ true);
+                emitTrailingCommentsOfPosition(pos, true);
             }
             return pos;
         }
         function emitReturnStatement(node) {
-            emitTokenWithComment(96 /* ReturnKeyword */, node.pos, writeKeyword, /*contextNode*/ node);
+            emitTokenWithComment(96, node.pos, writeKeyword, node);
             emitExpressionWithLeadingSpace(node.expression);
             writeSemicolon();
         }
         function emitWithStatement(node) {
-            var openParenPos = emitTokenWithComment(107 /* WithKeyword */, node.pos, writeKeyword, node);
+            var openParenPos = emitTokenWithComment(107, node.pos, writeKeyword, node);
             writeSpace();
-            emitTokenWithComment(19 /* OpenParenToken */, openParenPos, writePunctuation, node);
+            emitTokenWithComment(19, openParenPos, writePunctuation, node);
             emitExpression(node.expression);
-            emitTokenWithComment(20 /* CloseParenToken */, node.expression.end, writePunctuation, node);
+            emitTokenWithComment(20, node.expression.end, writePunctuation, node);
             emitEmbeddedStatement(node, node.statement);
         }
         function emitSwitchStatement(node) {
-            var openParenPos = emitTokenWithComment(98 /* SwitchKeyword */, node.pos, writeKeyword, node);
+            var openParenPos = emitTokenWithComment(98, node.pos, writeKeyword, node);
             writeSpace();
-            emitTokenWithComment(19 /* OpenParenToken */, openParenPos, writePunctuation, node);
+            emitTokenWithComment(19, openParenPos, writePunctuation, node);
             emitExpression(node.expression);
-            emitTokenWithComment(20 /* CloseParenToken */, node.expression.end, writePunctuation, node);
+            emitTokenWithComment(20, node.expression.end, writePunctuation, node);
             writeSpace();
             emit(node.caseBlock);
         }
         function emitLabeledStatement(node) {
             emit(node.label);
-            emitTokenWithComment(56 /* ColonToken */, node.label.end, writePunctuation, node);
+            emitTokenWithComment(56, node.label.end, writePunctuation, node);
             writeSpace();
             emit(node.statement);
         }
         function emitThrowStatement(node) {
-            emitTokenWithComment(100 /* ThrowKeyword */, node.pos, writeKeyword, node);
+            emitTokenWithComment(100, node.pos, writeKeyword, node);
             emitExpressionWithLeadingSpace(node.expression);
             writeSemicolon();
         }
         function emitTryStatement(node) {
-            emitTokenWithComment(102 /* TryKeyword */, node.pos, writeKeyword, node);
+            emitTokenWithComment(102, node.pos, writeKeyword, node);
             writeSpace();
             emit(node.tryBlock);
             if (node.catchClause) {
@@ -78720,18 +63502,15 @@ var ts;
             }
             if (node.finallyBlock) {
                 writeLineOrSpace(node);
-                emitTokenWithComment(87 /* FinallyKeyword */, (node.catchClause || node.tryBlock).end, writeKeyword, node);
+                emitTokenWithComment(87, (node.catchClause || node.tryBlock).end, writeKeyword, node);
                 writeSpace();
                 emit(node.finallyBlock);
             }
         }
         function emitDebuggerStatement(node) {
-            writeToken(78 /* DebuggerKeyword */, node.pos, writeKeyword);
+            writeToken(78, node.pos, writeKeyword);
             writeSemicolon();
         }
-        //
-        // Declarations
-        //
         function emitVariableDeclaration(node) {
             emit(node.name);
             emitTypeAnnotation(node.type);
@@ -78740,7 +63519,7 @@ var ts;
         function emitVariableDeclarationList(node) {
             writeKeyword(ts.isLet(node) ? "let" : ts.isConst(node) ? "const" : "var");
             writeSpace();
-            emitList(node, node.declarations, 272 /* VariableDeclarationList */);
+            emitList(node, node.declarations, 272);
         }
         function emitFunctionDeclaration(node) {
             emitFunctionDeclarationOrExpression(node);
@@ -78751,7 +63530,7 @@ var ts;
             writeKeyword("function");
             emit(node.asteriskToken);
             writeSpace();
-            emitIdentifierName(node.name); // TODO: GH#18217
+            emitIdentifierName(node.name);
             emitSignatureAndBody(node, emitSignatureHead);
         }
         function emitBlockCallback(_hint, body) {
@@ -78761,7 +63540,7 @@ var ts;
             var body = node.body;
             if (body) {
                 if (ts.isBlock(body)) {
-                    var indentedFlag = ts.getEmitFlags(node) & 65536 /* Indented */;
+                    var indentedFlag = ts.getEmitFlags(node) & 65536;
                     if (indentedFlag) {
                         increaseIndent();
                     }
@@ -78770,7 +63549,7 @@ var ts;
                     generateNames(node.body);
                     emitSignatureHead(node);
                     if (onEmitNode) {
-                        onEmitNode(4 /* Unspecified */, body, emitBlockCallback);
+                        onEmitNode(4, body, emitBlockCallback);
                     }
                     else {
                         emitBlockFunctionBody(body);
@@ -78797,13 +63576,7 @@ var ts;
             emitTypeAnnotation(node.type);
         }
         function shouldEmitBlockFunctionBodyOnSingleLine(body) {
-            // We must emit a function body as a single-line body in the following case:
-            // * The body has NodeEmitFlags.SingleLine specified.
-            // We must emit a function body as a multi-line body in the following cases:
-            // * The body is explicitly marked as multi-line.
-            // * A non-synthesized body's start and end position are on different lines.
-            // * Any statement in the body starts on a new line.
-            if (ts.getEmitFlags(body) & 1 /* SingleLine */) {
+            if (ts.getEmitFlags(body) & 1) {
                 return true;
             }
             if (body.multiLine) {
@@ -78812,14 +63585,14 @@ var ts;
             if (!ts.nodeIsSynthesized(body) && !ts.rangeIsOnSingleLine(body, currentSourceFile)) {
                 return false;
             }
-            if (shouldWriteLeadingLineTerminator(body, body.statements, 2 /* PreserveLines */)
-                || shouldWriteClosingLineTerminator(body, body.statements, 2 /* PreserveLines */)) {
+            if (shouldWriteLeadingLineTerminator(body, body.statements, 2)
+                || shouldWriteClosingLineTerminator(body, body.statements, 2)) {
                 return false;
             }
             var previousStatement;
             for (var _a = 0, _b = body.statements; _a < _b.length; _a++) {
                 var statement = _b[_a];
-                if (shouldWriteSeparatingLineTerminator(previousStatement, statement, 2 /* PreserveLines */)) {
+                if (shouldWriteSeparatingLineTerminator(previousStatement, statement, 2)) {
                     return false;
                 }
                 previousStatement = statement;
@@ -78840,23 +63613,22 @@ var ts;
                 emitBlockFunctionBody(body);
             }
             decreaseIndent();
-            writeToken(18 /* CloseBraceToken */, body.statements.end, writePunctuation, body);
+            writeToken(18, body.statements.end, writePunctuation, body);
         }
         function emitBlockFunctionBodyOnSingleLine(body) {
-            emitBlockFunctionBodyWorker(body, /*emitBlockFunctionBodyOnSingleLine*/ true);
+            emitBlockFunctionBodyWorker(body, true);
         }
         function emitBlockFunctionBodyWorker(body, emitBlockFunctionBodyOnSingleLine) {
-            // Emit all the prologue directives (like "use strict").
-            var statementOffset = emitPrologueDirectives(body.statements, /*startWithNewLine*/ true);
+            var statementOffset = emitPrologueDirectives(body.statements, true);
             var pos = writer.getTextPos();
             emitHelpers(body);
             if (statementOffset === 0 && pos === writer.getTextPos() && emitBlockFunctionBodyOnSingleLine) {
                 decreaseIndent();
-                emitList(body, body.statements, 384 /* SingleLineFunctionBodyStatements */);
+                emitList(body, body.statements, 384);
                 increaseIndent();
             }
             else {
-                emitList(body, body.statements, 1 /* MultiLineFunctionBodyStatements */, statementOffset);
+                emitList(body, body.statements, 1, statementOffset);
             }
         }
         function emitClassDeclaration(node) {
@@ -78871,15 +63643,15 @@ var ts;
                 writeSpace();
                 emitIdentifierName(node.name);
             }
-            var indentedFlag = ts.getEmitFlags(node) & 65536 /* Indented */;
+            var indentedFlag = ts.getEmitFlags(node) & 65536;
             if (indentedFlag) {
                 increaseIndent();
             }
             emitTypeParameters(node, node.typeParameters);
-            emitList(node, node.heritageClauses, 0 /* ClassHeritageClauses */);
+            emitList(node, node.heritageClauses, 0);
             writeSpace();
             writePunctuation("{");
-            emitList(node, node.members, 65 /* ClassMembers */);
+            emitList(node, node.members, 65);
             writePunctuation("}");
             if (indentedFlag) {
                 decreaseIndent();
@@ -78892,10 +63664,10 @@ var ts;
             writeSpace();
             emit(node.name);
             emitTypeParameters(node, node.typeParameters);
-            emitList(node, node.heritageClauses, 256 /* HeritageClauses */);
+            emitList(node, node.heritageClauses, 256);
             writeSpace();
             writePunctuation("{");
-            emitList(node, node.members, 65 /* InterfaceMembers */);
+            emitList(node, node.members, 65);
             writePunctuation("}");
         }
         function emitTypeAliasDeclaration(node) {
@@ -78918,20 +63690,20 @@ var ts;
             emit(node.name);
             writeSpace();
             writePunctuation("{");
-            emitList(node, node.members, 81 /* EnumMembers */);
+            emitList(node, node.members, 81);
             writePunctuation("}");
         }
         function emitModuleDeclaration(node) {
             emitModifiers(node, node.modifiers);
-            if (~node.flags & 512 /* GlobalAugmentation */) {
-                writeKeyword(node.flags & 16 /* Namespace */ ? "namespace" : "module");
+            if (~node.flags & 512) {
+                writeKeyword(node.flags & 16 ? "namespace" : "module");
                 writeSpace();
             }
             emit(node.name);
             var body = node.body;
             if (!body)
                 return writeSemicolon();
-            while (body.kind === 239 /* ModuleDeclaration */) {
+            while (body.kind === 239) {
                 writePunctuation(".");
                 emit(body.name);
                 body = body.body;
@@ -78942,27 +63714,27 @@ var ts;
         function emitModuleBlock(node) {
             pushNameGenerationScope(node);
             ts.forEach(node.statements, generateNames);
-            emitBlockStatements(node, /*forceSingleLine*/ isEmptyBlock(node));
+            emitBlockStatements(node, isEmptyBlock(node));
             popNameGenerationScope(node);
         }
         function emitCaseBlock(node) {
-            emitTokenWithComment(17 /* OpenBraceToken */, node.pos, writePunctuation, node);
-            emitList(node, node.clauses, 65 /* CaseBlockClauses */);
-            emitTokenWithComment(18 /* CloseBraceToken */, node.clauses.end, writePunctuation, node, /*indentLeading*/ true);
+            emitTokenWithComment(17, node.pos, writePunctuation, node);
+            emitList(node, node.clauses, 65);
+            emitTokenWithComment(18, node.clauses.end, writePunctuation, node, true);
         }
         function emitImportEqualsDeclaration(node) {
             emitModifiers(node, node.modifiers);
-            emitTokenWithComment(91 /* ImportKeyword */, node.modifiers ? node.modifiers.end : node.pos, writeKeyword, node);
+            emitTokenWithComment(91, node.modifiers ? node.modifiers.end : node.pos, writeKeyword, node);
             writeSpace();
             emit(node.name);
             writeSpace();
-            emitTokenWithComment(58 /* EqualsToken */, node.name.end, writePunctuation, node);
+            emitTokenWithComment(58, node.name.end, writePunctuation, node);
             writeSpace();
             emitModuleReference(node.moduleReference);
             writeSemicolon();
         }
         function emitModuleReference(node) {
-            if (node.kind === 71 /* Identifier */) {
+            if (node.kind === 71) {
                 emitExpression(node);
             }
             else {
@@ -78971,12 +63743,12 @@ var ts;
         }
         function emitImportDeclaration(node) {
             emitModifiers(node, node.modifiers);
-            emitTokenWithComment(91 /* ImportKeyword */, node.modifiers ? node.modifiers.end : node.pos, writeKeyword, node);
+            emitTokenWithComment(91, node.modifiers ? node.modifiers.end : node.pos, writeKeyword, node);
             writeSpace();
             if (node.importClause) {
                 emit(node.importClause);
                 writeSpace();
-                emitTokenWithComment(143 /* FromKeyword */, node.importClause.end, writeKeyword, node);
+                emitTokenWithComment(143, node.importClause.end, writeKeyword, node);
                 writeSpace();
             }
             emitExpression(node.moduleSpecifier);
@@ -78985,15 +63757,15 @@ var ts;
         function emitImportClause(node) {
             emit(node.name);
             if (node.name && node.namedBindings) {
-                emitTokenWithComment(26 /* CommaToken */, node.name.end, writePunctuation, node);
+                emitTokenWithComment(26, node.name.end, writePunctuation, node);
                 writeSpace();
             }
             emit(node.namedBindings);
         }
         function emitNamespaceImport(node) {
-            var asPos = emitTokenWithComment(39 /* AsteriskToken */, node.pos, writePunctuation, node);
+            var asPos = emitTokenWithComment(39, node.pos, writePunctuation, node);
             writeSpace();
-            emitTokenWithComment(118 /* AsKeyword */, asPos, writeKeyword, node);
+            emitTokenWithComment(118, asPos, writeKeyword, node);
             writeSpace();
             emit(node.name);
         }
@@ -79004,42 +63776,42 @@ var ts;
             emitImportOrExportSpecifier(node);
         }
         function emitExportAssignment(node) {
-            var nextPos = emitTokenWithComment(84 /* ExportKeyword */, node.pos, writeKeyword, node);
+            var nextPos = emitTokenWithComment(84, node.pos, writeKeyword, node);
             writeSpace();
             if (node.isExportEquals) {
-                emitTokenWithComment(58 /* EqualsToken */, nextPos, writeOperator, node);
+                emitTokenWithComment(58, nextPos, writeOperator, node);
             }
             else {
-                emitTokenWithComment(79 /* DefaultKeyword */, nextPos, writeKeyword, node);
+                emitTokenWithComment(79, nextPos, writeKeyword, node);
             }
             writeSpace();
             emitExpression(node.expression);
             writeSemicolon();
         }
         function emitExportDeclaration(node) {
-            var nextPos = emitTokenWithComment(84 /* ExportKeyword */, node.pos, writeKeyword, node);
+            var nextPos = emitTokenWithComment(84, node.pos, writeKeyword, node);
             writeSpace();
             if (node.exportClause) {
                 emit(node.exportClause);
             }
             else {
-                nextPos = emitTokenWithComment(39 /* AsteriskToken */, nextPos, writePunctuation, node);
+                nextPos = emitTokenWithComment(39, nextPos, writePunctuation, node);
             }
             if (node.moduleSpecifier) {
                 writeSpace();
                 var fromPos = node.exportClause ? node.exportClause.end : nextPos;
-                emitTokenWithComment(143 /* FromKeyword */, fromPos, writeKeyword, node);
+                emitTokenWithComment(143, fromPos, writeKeyword, node);
                 writeSpace();
                 emitExpression(node.moduleSpecifier);
             }
             writeSemicolon();
         }
         function emitNamespaceExportDeclaration(node) {
-            var nextPos = emitTokenWithComment(84 /* ExportKeyword */, node.pos, writeKeyword, node);
+            var nextPos = emitTokenWithComment(84, node.pos, writeKeyword, node);
             writeSpace();
-            nextPos = emitTokenWithComment(118 /* AsKeyword */, nextPos, writeKeyword, node);
+            nextPos = emitTokenWithComment(118, nextPos, writeKeyword, node);
             writeSpace();
-            nextPos = emitTokenWithComment(130 /* NamespaceKeyword */, nextPos, writeKeyword, node);
+            nextPos = emitTokenWithComment(130, nextPos, writeKeyword, node);
             writeSpace();
             emit(node.name);
             writeSemicolon();
@@ -79052,33 +63824,27 @@ var ts;
         }
         function emitNamedImportsOrExports(node) {
             writePunctuation("{");
-            emitList(node, node.elements, 262576 /* NamedImportsOrExportsElements */);
+            emitList(node, node.elements, 262576);
             writePunctuation("}");
         }
         function emitImportOrExportSpecifier(node) {
             if (node.propertyName) {
                 emit(node.propertyName);
                 writeSpace();
-                emitTokenWithComment(118 /* AsKeyword */, node.propertyName.end, writeKeyword, node);
+                emitTokenWithComment(118, node.propertyName.end, writeKeyword, node);
                 writeSpace();
             }
             emit(node.name);
         }
-        //
-        // Module references
-        //
         function emitExternalModuleReference(node) {
             writeKeyword("require");
             writePunctuation("(");
             emitExpression(node.expression);
             writePunctuation(")");
         }
-        //
-        // JSX
-        //
         function emitJsxElement(node) {
             emit(node.openingElement);
-            emitList(node, node.children, 131072 /* JsxElementOrFragmentChildren */);
+            emitList(node, node.children, 131072);
             emit(node.closingElement);
         }
         function emitJsxSelfClosingElement(node) {
@@ -79090,7 +63856,7 @@ var ts;
         }
         function emitJsxFragment(node) {
             emit(node.openingFragment);
-            emitList(node, node.children, 131072 /* JsxElementOrFragmentChildren */);
+            emitList(node, node.children, 131072);
             emit(node.closingFragment);
         }
         function emitJsxOpeningElementOrFragment(node) {
@@ -79106,7 +63872,7 @@ var ts;
         }
         function emitJsxText(node) {
             commitPendingSemicolon();
-            writer.writeLiteral(getTextOfNode(node, /*includeTrivia*/ true));
+            writer.writeLiteral(getTextOfNode(node, true));
         }
         function emitJsxClosingElementOrFragment(node) {
             writePunctuation("</");
@@ -79116,11 +63882,11 @@ var ts;
             writePunctuation(">");
         }
         function emitJsxAttributes(node) {
-            emitList(node, node.properties, 131328 /* JsxElementAttributes */);
+            emitList(node, node.properties, 131328);
         }
         function emitJsxAttribute(node) {
             emit(node.name);
-            emitNodeWithPrefix("=", writePunctuation, node.initializer, emit); // TODO: GH#18217
+            emitNodeWithPrefix("=", writePunctuation, node.initializer, emit);
         }
         function emitJsxSpreadAttribute(node) {
             writePunctuation("{...");
@@ -79136,41 +63902,36 @@ var ts;
             }
         }
         function emitJsxTagName(node) {
-            if (node.kind === 71 /* Identifier */) {
+            if (node.kind === 71) {
                 emitExpression(node);
             }
             else {
                 emit(node);
             }
         }
-        //
-        // Clauses
-        //
         function emitCaseClause(node) {
-            emitTokenWithComment(73 /* CaseKeyword */, node.pos, writeKeyword, node);
+            emitTokenWithComment(73, node.pos, writeKeyword, node);
             writeSpace();
             emitExpression(node.expression);
             emitCaseOrDefaultClauseRest(node, node.statements, node.expression.end);
         }
         function emitDefaultClause(node) {
-            var pos = emitTokenWithComment(79 /* DefaultKeyword */, node.pos, writeKeyword, node);
+            var pos = emitTokenWithComment(79, node.pos, writeKeyword, node);
             emitCaseOrDefaultClauseRest(node, node.statements, pos);
         }
         function emitCaseOrDefaultClauseRest(parentNode, statements, colonPos) {
             var emitAsSingleStatement = statements.length === 1 &&
-                (
-                // treat synthesized nodes as located on the same line for emit purposes
-                ts.nodeIsSynthesized(parentNode) ||
+                (ts.nodeIsSynthesized(parentNode) ||
                     ts.nodeIsSynthesized(statements[0]) ||
                     ts.rangeStartPositionsAreOnSameLine(parentNode, statements[0], currentSourceFile));
-            var format = 81985 /* CaseOrDefaultClauseStatements */;
+            var format = 81985;
             if (emitAsSingleStatement) {
-                writeToken(56 /* ColonToken */, colonPos, writePunctuation, parentNode);
+                writeToken(56, colonPos, writePunctuation, parentNode);
                 writeSpace();
-                format &= ~(1 /* MultiLine */ | 64 /* Indented */);
+                format &= ~(1 | 64);
             }
             else {
-                emitTokenWithComment(56 /* ColonToken */, colonPos, writePunctuation, parentNode);
+                emitTokenWithComment(56, colonPos, writePunctuation, parentNode);
             }
             emitList(parentNode, statements, format);
         }
@@ -79178,35 +63939,25 @@ var ts;
             writeSpace();
             writeTokenText(node.token, writeKeyword);
             writeSpace();
-            emitList(node, node.types, 272 /* HeritageClauseTypes */);
+            emitList(node, node.types, 272);
         }
         function emitCatchClause(node) {
-            var openParenPos = emitTokenWithComment(74 /* CatchKeyword */, node.pos, writeKeyword, node);
+            var openParenPos = emitTokenWithComment(74, node.pos, writeKeyword, node);
             writeSpace();
             if (node.variableDeclaration) {
-                emitTokenWithComment(19 /* OpenParenToken */, openParenPos, writePunctuation, node);
+                emitTokenWithComment(19, openParenPos, writePunctuation, node);
                 emit(node.variableDeclaration);
-                emitTokenWithComment(20 /* CloseParenToken */, node.variableDeclaration.end, writePunctuation, node);
+                emitTokenWithComment(20, node.variableDeclaration.end, writePunctuation, node);
                 writeSpace();
             }
             emit(node.block);
         }
-        //
-        // Property assignments
-        //
         function emitPropertyAssignment(node) {
             emit(node.name);
             writePunctuation(":");
             writeSpace();
-            // This is to ensure that we emit comment in the following case:
-            //      For example:
-            //          obj = {
-            //              id: /*comment1*/ ()=>void
-            //          }
-            // "comment1" is not considered to be leading comment for node.initializer
-            // but rather a trailing comment on the previous node.
             var initializer = node.initializer;
-            if (emitTrailingCommentsOfPosition && (ts.getEmitFlags(initializer) & 512 /* NoLeadingComments */) === 0) {
+            if (emitTrailingCommentsOfPosition && (ts.getEmitFlags(initializer) & 512) === 0) {
                 var commentRange = ts.getCommentRange(initializer);
                 emitTrailingCommentsOfPosition(commentRange.pos);
             }
@@ -79227,22 +63978,14 @@ var ts;
                 emitExpression(node.expression);
             }
         }
-        //
-        // Enum
-        //
         function emitEnumMember(node) {
             emit(node.name);
             emitInitializer(node.initializer, node.name.end, node);
         }
-        //
-        // Top-level nodes
-        //
         function emitSourceFile(node) {
             writeLine();
             var statements = node.statements;
             if (emitBodyWithDetachedComments) {
-                // Emit detached comment if there are no prologue directives or if the first node is synthesized.
-                // The synthesized node will have no leading comment so some comments may be missed.
                 var shouldEmitDetachedComment = statements.length === 0 ||
                     !ts.isPrologueDirective(statements[0]) ||
                     ts.nodeIsSynthesized(statements[0]);
@@ -79299,20 +64042,15 @@ var ts;
             emitHelpers(node);
             var index = ts.findIndex(statements, function (statement) { return !ts.isPrologueDirective(statement); });
             emitTripleSlashDirectivesIfNeeded(node);
-            emitList(node, statements, 1 /* MultiLine */, index === -1 ? statements.length : index);
+            emitList(node, statements, 1, index === -1 ? statements.length : index);
             popNameGenerationScope(node);
         }
-        // Transformation nodes
         function emitPartiallyEmittedExpression(node) {
             emitExpression(node.expression);
         }
         function emitCommaList(node) {
-            emitExpressionList(node, node.elements, 272 /* CommaListElements */);
+            emitExpressionList(node, node.elements, 272);
         }
-        /**
-         * Emits any prologue directives at the start of a Statement list, returning the
-         * number of prologue directives written to the output.
-         */
         function emitPrologueDirectives(statements, startWithNewLine, seenPrologueDirectives) {
             for (var i = 0; i < statements.length; i++) {
                 var statement = statements[i];
@@ -79329,7 +64067,6 @@ var ts;
                     }
                 }
                 else {
-                    // return index of the first non prologue directive
                     return i;
                 }
             }
@@ -79345,7 +64082,7 @@ var ts;
                 for (var _a = 0, _b = sourceFileOrBundle.sourceFiles; _a < _b.length; _a++) {
                     var sourceFile = _b[_a];
                     setSourceFile(sourceFile);
-                    emitPrologueDirectives(sourceFile.statements, /*startWithNewLine*/ true, seenPrologueDirectives);
+                    emitPrologueDirectives(sourceFile.statements, true, seenPrologueDirectives);
                 }
             }
         }
@@ -79361,16 +64098,12 @@ var ts;
             else {
                 for (var _a = 0, _b = sourceFileOrBundle.sourceFiles; _a < _b.length; _a++) {
                     var sourceFile = _b[_a];
-                    // Emit only the first encountered shebang
                     if (emitShebangIfNeeded(sourceFile)) {
                         break;
                     }
                 }
             }
         }
-        //
-        // Helpers
-        //
         function emitNodeWithWriter(node, writer) {
             if (!node)
                 return;
@@ -79381,7 +64114,7 @@ var ts;
         }
         function emitModifiers(node, modifiers) {
             if (modifiers && modifiers.length) {
-                emitList(node, modifiers, 131328 /* Modifiers */);
+                emitList(node, modifiers, 131328);
                 writeSpace();
             }
         }
@@ -79395,7 +64128,7 @@ var ts;
         function emitInitializer(node, equalCommentStartPos, container) {
             if (node) {
                 writeSpace();
-                emitTokenWithComment(58 /* EqualsToken */, equalCommentStartPos, writeOperator, container);
+                emitTokenWithComment(58, equalCommentStartPos, writeOperator, container);
                 writeSpace();
                 emitExpression(node);
             }
@@ -79425,7 +64158,7 @@ var ts;
             }
         }
         function emitEmbeddedStatement(parent, node) {
-            if (ts.isBlock(node) || ts.getEmitFlags(parent) & 1 /* SingleLine */) {
+            if (ts.isBlock(node) || ts.getEmitFlags(parent) & 1) {
                 writeSpace();
                 emit(node);
             }
@@ -79437,65 +64170,65 @@ var ts;
             }
         }
         function emitDecorators(parentNode, decorators) {
-            emitList(parentNode, decorators, 24577 /* Decorators */);
+            emitList(parentNode, decorators, 24577);
         }
         function emitTypeArguments(parentNode, typeArguments) {
-            emitList(parentNode, typeArguments, 26896 /* TypeArguments */);
+            emitList(parentNode, typeArguments, 26896);
         }
         function emitTypeParameters(parentNode, typeParameters) {
-            if (ts.isFunctionLike(parentNode) && parentNode.typeArguments) { // Quick info uses type arguments in place of type parameters on instantiated signatures
+            if (ts.isFunctionLike(parentNode) && parentNode.typeArguments) {
                 return emitTypeArguments(parentNode, parentNode.typeArguments);
             }
-            emitList(parentNode, typeParameters, 26896 /* TypeParameters */);
+            emitList(parentNode, typeParameters, 26896);
         }
         function emitParameters(parentNode, parameters) {
-            emitList(parentNode, parameters, 1296 /* Parameters */);
+            emitList(parentNode, parameters, 1296);
         }
         function canEmitSimpleArrowHead(parentNode, parameters) {
             var parameter = ts.singleOrUndefined(parameters);
             return parameter
-                && parameter.pos === parentNode.pos // may not have parsed tokens between parent and parameter
-                && !(ts.isArrowFunction(parentNode) && parentNode.type) // arrow function may not have return type annotation
-                && !ts.some(parentNode.decorators) // parent may not have decorators
-                && !ts.some(parentNode.modifiers) // parent may not have modifiers
-                && !ts.some(parentNode.typeParameters) // parent may not have type parameters
-                && !ts.some(parameter.decorators) // parameter may not have decorators
-                && !ts.some(parameter.modifiers) // parameter may not have modifiers
-                && !parameter.dotDotDotToken // parameter may not be rest
-                && !parameter.questionToken // parameter may not be optional
-                && !parameter.type // parameter may not have a type annotation
-                && !parameter.initializer // parameter may not have an initializer
-                && ts.isIdentifier(parameter.name); // parameter name must be identifier
+                && parameter.pos === parentNode.pos
+                && !(ts.isArrowFunction(parentNode) && parentNode.type)
+                && !ts.some(parentNode.decorators)
+                && !ts.some(parentNode.modifiers)
+                && !ts.some(parentNode.typeParameters)
+                && !ts.some(parameter.decorators)
+                && !ts.some(parameter.modifiers)
+                && !parameter.dotDotDotToken
+                && !parameter.questionToken
+                && !parameter.type
+                && !parameter.initializer
+                && ts.isIdentifier(parameter.name);
         }
         function emitParametersForArrow(parentNode, parameters) {
             if (canEmitSimpleArrowHead(parentNode, parameters)) {
-                emitList(parentNode, parameters, 1296 /* Parameters */ & ~1024 /* Parenthesis */);
+                emitList(parentNode, parameters, 1296 & ~1024);
             }
             else {
                 emitParameters(parentNode, parameters);
             }
         }
         function emitParametersForIndexSignature(parentNode, parameters) {
-            emitList(parentNode, parameters, 4432 /* IndexSignatureParameters */);
+            emitList(parentNode, parameters, 4432);
         }
         function emitList(parentNode, children, format, start, count) {
             emitNodeList(emit, parentNode, children, format, start, count);
         }
         function emitExpressionList(parentNode, children, format, start, count) {
-            emitNodeList(emitExpression, parentNode, children, format, start, count); // TODO: GH#18217
+            emitNodeList(emitExpression, parentNode, children, format, start, count);
         }
         function writeDelimiter(format) {
-            switch (format & 28 /* DelimitersMask */) {
-                case 0 /* None */:
+            switch (format & 28) {
+                case 0:
                     break;
-                case 16 /* CommaDelimited */:
+                case 16:
                     writePunctuation(",");
                     break;
-                case 4 /* BarDelimited */:
+                case 4:
                     writeSpace();
                     writePunctuation("|");
                     break;
-                case 8 /* AmpersandDelimited */:
+                case 8:
                     writeSpace();
                     writePunctuation("&");
                     break;
@@ -79505,11 +64238,11 @@ var ts;
             if (start === void 0) { start = 0; }
             if (count === void 0) { count = children ? children.length - start : 0; }
             var isUndefined = children === undefined;
-            if (isUndefined && format & 8192 /* OptionalIfUndefined */) {
+            if (isUndefined && format & 8192) {
                 return;
             }
             var isEmpty = children === undefined || start >= children.length || count === 0;
-            if (isEmpty && format & 16384 /* OptionalIfEmpty */) {
+            if (isEmpty && format & 16384) {
                 if (onBeforeEmitNodeArray) {
                     onBeforeEmitNodeArray(children);
                 }
@@ -79518,73 +64251,57 @@ var ts;
                 }
                 return;
             }
-            if (format & 7680 /* BracketsMask */) {
+            if (format & 7680) {
                 writePunctuation(getOpeningBracket(format));
                 if (isEmpty && !isUndefined) {
-                    // TODO: GH#18217
-                    emitTrailingCommentsOfPosition(children.pos, /*prefixSpace*/ true); // Emit comments within empty bracketed lists
+                    emitTrailingCommentsOfPosition(children.pos, true);
                 }
             }
             if (onBeforeEmitNodeArray) {
                 onBeforeEmitNodeArray(children);
             }
             if (isEmpty) {
-                // Write a line terminator if the parent node was multi-line
-                if (format & 1 /* MultiLine */) {
+                if (format & 1) {
                     writeLine();
                 }
-                else if (format & 128 /* SpaceBetweenBraces */ && !(format & 262144 /* NoSpaceIfEmpty */)) {
+                else if (format & 128 && !(format & 262144)) {
                     writeSpace();
                 }
             }
             else {
-                // Write the opening line terminator or leading whitespace.
-                var mayEmitInterveningComments = (format & 131072 /* NoInterveningComments */) === 0;
+                var mayEmitInterveningComments = (format & 131072) === 0;
                 var shouldEmitInterveningComments = mayEmitInterveningComments;
-                if (shouldWriteLeadingLineTerminator(parentNode, children, format)) { // TODO: GH#18217
+                if (shouldWriteLeadingLineTerminator(parentNode, children, format)) {
                     writeLine();
                     shouldEmitInterveningComments = false;
                 }
-                else if (format & 128 /* SpaceBetweenBraces */) {
+                else if (format & 128) {
                     writeSpace();
                 }
-                // Increase the indent, if requested.
-                if (format & 64 /* Indented */) {
+                if (format & 64) {
                     increaseIndent();
                 }
-                // Emit each child.
                 var previousSibling = void 0;
                 var shouldDecreaseIndentAfterEmit = false;
                 for (var i = 0; i < count; i++) {
                     var child = children[start + i];
-                    // Write the delimiter if this is not the first node.
                     if (previousSibling) {
-                        // i.e
-                        //      function commentedParameters(
-                        //          /* Parameter a */
-                        //          a
-                        //          /* End of parameter a */ -> this comment isn't considered to be trailing comment of parameter "a" due to newline
-                        //          ,
-                        if (format & 28 /* DelimitersMask */ && previousSibling.end !== parentNode.end) {
+                        if (format & 28 && previousSibling.end !== parentNode.end) {
                             emitLeadingCommentsOfPosition(previousSibling.end);
                         }
                         writeDelimiter(format);
-                        // Write either a line terminator or whitespace to separate the elements.
                         if (shouldWriteSeparatingLineTerminator(previousSibling, child, format)) {
-                            // If a synthesized node in a single-line list starts on a new
-                            // line, we should increase the indent.
-                            if ((format & (3 /* LinesMask */ | 64 /* Indented */)) === 0 /* SingleLine */) {
+                            if ((format & (3 | 64)) === 0) {
                                 increaseIndent();
                                 shouldDecreaseIndentAfterEmit = true;
                             }
                             writeLine();
                             shouldEmitInterveningComments = false;
                         }
-                        else if (previousSibling && format & 256 /* SpaceBetweenSiblings */) {
+                        else if (previousSibling && format & 256) {
                             writeSpace();
                         }
                     }
-                    // Emit this child.
                     if (shouldEmitInterveningComments) {
                         if (emitTrailingCommentsOfPosition) {
                             var commentRange = ts.getCommentRange(child);
@@ -79601,39 +64318,29 @@ var ts;
                     }
                     previousSibling = child;
                 }
-                // Write a trailing comma, if requested.
-                var hasTrailingComma = (format & 32 /* AllowTrailingComma */) && children.hasTrailingComma;
-                if (format & 16 /* CommaDelimited */ && hasTrailingComma) {
+                var hasTrailingComma = (format & 32) && children.hasTrailingComma;
+                if (format & 16 && hasTrailingComma) {
                     writePunctuation(",");
                 }
-                // Emit any trailing comment of the last element in the list
-                // i.e
-                //       var array = [...
-                //          2
-                //          /* end of element 2 */
-                //       ];
-                if (previousSibling && format & 28 /* DelimitersMask */ && previousSibling.end !== parentNode.end && !(ts.getEmitFlags(previousSibling) & 1024 /* NoTrailingComments */)) {
+                if (previousSibling && format & 28 && previousSibling.end !== parentNode.end && !(ts.getEmitFlags(previousSibling) & 1024)) {
                     emitLeadingCommentsOfPosition(previousSibling.end);
                 }
-                // Decrease the indent, if requested.
-                if (format & 64 /* Indented */) {
+                if (format & 64) {
                     decreaseIndent();
                 }
-                // Write the closing line terminator or closing whitespace.
                 if (shouldWriteClosingLineTerminator(parentNode, children, format)) {
                     writeLine();
                 }
-                else if (format & 128 /* SpaceBetweenBraces */) {
+                else if (format & 128) {
                     writeSpace();
                 }
             }
             if (onAfterEmitNodeArray) {
                 onAfterEmitNodeArray(children);
             }
-            if (format & 7680 /* BracketsMask */) {
+            if (format & 7680) {
                 if (isEmpty && !isUndefined) {
-                    // TODO: GH#18217
-                    emitLeadingCommentsOfPosition(children.end); // Emit leading comments within empty lists
+                    emitLeadingCommentsOfPosition(children.end);
                 }
                 writePunctuation(getClosingBracket(format));
             }
@@ -79722,7 +64429,7 @@ var ts;
             return pos < 0 ? pos : pos + tokenString.length;
         }
         function writeLineOrSpace(node) {
-            if (ts.getEmitFlags(node) & 1 /* SingleLine */) {
+            if (ts.getEmitFlags(node) & 1) {
                 writeSpace();
             }
             else {
@@ -79732,8 +64439,8 @@ var ts;
         function writeLines(text) {
             var lines = text.split(/\r\n?|\n/g);
             var indentation = ts.guessIndentation(lines);
-            for (var _a = 0, lines_1 = lines; _a < lines_1.length; _a++) {
-                var lineText = lines_1[_a];
+            for (var _a = 0, lines_2 = lines; _a < lines_2.length; _a++) {
+                var lineText = lines_2[_a];
                 var line = indentation ? lineText.slice(indentation) : lineText;
                 if (line.length) {
                     writeLine();
@@ -79751,10 +64458,6 @@ var ts;
                 write(valueToWriteWhenNotIndenting);
             }
         }
-        // Helper function to decrease the indent if we previously indented.  Allows multiple
-        // previous indent values to be considered at a time.  This also allows caller to just
-        // call this once, passing in all their appropriate indent values, instead of needing
-        // to call this helper function multiple times.
         function decreaseIndentIf(value1, value2) {
             if (value1) {
                 decreaseIndent();
@@ -79764,11 +64467,11 @@ var ts;
             }
         }
         function shouldWriteLeadingLineTerminator(parentNode, children, format) {
-            if (format & 1 /* MultiLine */) {
+            if (format & 1) {
                 return true;
             }
-            if (format & 2 /* PreserveLines */) {
-                if (format & 32768 /* PreferNewLine */) {
+            if (format & 2) {
+                if (format & 32768) {
                     return true;
                 }
                 var firstChild = children[0];
@@ -79787,10 +64490,10 @@ var ts;
             }
         }
         function shouldWriteSeparatingLineTerminator(previousNode, nextNode, format) {
-            if (format & 1 /* MultiLine */) {
+            if (format & 1) {
                 return true;
             }
-            else if (format & 2 /* PreserveLines */) {
+            else if (format & 2) {
                 if (previousNode === undefined || nextNode === undefined) {
                     return false;
                 }
@@ -79806,11 +64509,11 @@ var ts;
             }
         }
         function shouldWriteClosingLineTerminator(parentNode, children, format) {
-            if (format & 1 /* MultiLine */) {
-                return (format & 65536 /* NoTrailingNewLine */) === 0;
+            if (format & 1) {
+                return (format & 65536) === 0;
             }
-            else if (format & 2 /* PreserveLines */) {
-                if (format & 32768 /* PreferNewLine */) {
+            else if (format & 2) {
+                if (format & 32768) {
                     return true;
                 }
                 var lastChild = ts.lastOrUndefined(children);
@@ -79832,17 +64535,16 @@ var ts;
             if (ts.nodeIsSynthesized(node)) {
                 var startsOnNewLine = ts.getStartsOnNewLine(node);
                 if (startsOnNewLine === undefined) {
-                    return (format & 32768 /* PreferNewLine */) !== 0;
+                    return (format & 32768) !== 0;
                 }
                 return startsOnNewLine;
             }
-            return (format & 32768 /* PreferNewLine */) !== 0;
+            return (format & 32768) !== 0;
         }
         function needsIndentation(parent, node1, node2) {
             parent = skipSynthesizedParentheses(parent);
             node1 = skipSynthesizedParentheses(node1);
             node2 = skipSynthesizedParentheses(node2);
-            // Always use a newline for synthesized code if the synthesizer desires it.
             if (ts.getStartsOnNewLine(node2)) {
                 return true;
             }
@@ -79856,7 +64558,7 @@ var ts;
                 && ts.rangeEndIsOnSameLineAsRangeStart(block, block, currentSourceFile);
         }
         function skipSynthesizedParentheses(node) {
-            while (node.kind === 191 /* ParenthesizedExpression */ && ts.nodeIsSynthesized(node)) {
+            while (node.kind === 191 && ts.nodeIsSynthesized(node)) {
                 node = node.expression;
             }
             return node;
@@ -79868,7 +64570,7 @@ var ts;
             else if (ts.isIdentifier(node) && (ts.nodeIsSynthesized(node) || !node.parent || !currentSourceFile || (node.parent && currentSourceFile && ts.getSourceFileOfNode(node) !== ts.getOriginalNode(currentSourceFile)))) {
                 return ts.idText(node);
             }
-            else if (node.kind === 9 /* StringLiteral */ && node.textSourceNode) {
+            else if (node.kind === 9 && node.textSourceNode) {
                 return getTextOfNode(node.textSourceNode, includeTrivia);
             }
             else if (ts.isLiteralExpression(node) && (ts.nodeIsSynthesized(node) || !node.parent)) {
@@ -79877,10 +64579,10 @@ var ts;
             return ts.getSourceTextOfNodeFromSourceFile(currentSourceFile, node, includeTrivia);
         }
         function getLiteralTextOfNode(node) {
-            if (node.kind === 9 /* StringLiteral */ && node.textSourceNode) {
+            if (node.kind === 9 && node.textSourceNode) {
                 var textSourceNode = node.textSourceNode;
                 if (ts.isIdentifier(textSourceNode)) {
-                    return ts.getEmitFlags(node) & 16777216 /* NoAsciiEscaping */ ?
+                    return ts.getEmitFlags(node) & 16777216 ?
                         "\"" + ts.escapeString(getTextOfNode(textSourceNode)) + "\"" :
                         "\"" + ts.escapeNonAsciiString(getTextOfNode(textSourceNode)) + "\"";
                 }
@@ -79890,22 +64592,16 @@ var ts;
             }
             return ts.getLiteralText(node, currentSourceFile);
         }
-        /**
-         * Push a new name generation scope.
-         */
         function pushNameGenerationScope(node) {
-            if (node && ts.getEmitFlags(node) & 524288 /* ReuseTempVariableScope */) {
+            if (node && ts.getEmitFlags(node) & 524288) {
                 return;
             }
             tempFlagsStack.push(tempFlags);
             tempFlags = 0;
             reservedNamesStack.push(reservedNames);
         }
-        /**
-         * Pop the current name generation scope.
-         */
         function popNameGenerationScope(node) {
-            if (node && ts.getEmitFlags(node) & 524288 /* ReuseTempVariableScope */) {
+            if (node && ts.getEmitFlags(node) & 524288) {
                 return;
             }
             tempFlags = tempFlagsStack.pop();
@@ -79921,81 +64617,81 @@ var ts;
             if (!node)
                 return;
             switch (node.kind) {
-                case 213 /* Block */:
+                case 213:
                     ts.forEach(node.statements, generateNames);
                     break;
-                case 228 /* LabeledStatement */:
-                case 226 /* WithStatement */:
-                case 218 /* DoStatement */:
-                case 219 /* WhileStatement */:
+                case 228:
+                case 226:
+                case 218:
+                case 219:
                     generateNames(node.statement);
                     break;
-                case 217 /* IfStatement */:
+                case 217:
                     generateNames(node.thenStatement);
                     generateNames(node.elseStatement);
                     break;
-                case 220 /* ForStatement */:
-                case 222 /* ForOfStatement */:
-                case 221 /* ForInStatement */:
+                case 220:
+                case 222:
+                case 221:
                     generateNames(node.initializer);
                     generateNames(node.statement);
                     break;
-                case 227 /* SwitchStatement */:
+                case 227:
                     generateNames(node.caseBlock);
                     break;
-                case 241 /* CaseBlock */:
+                case 241:
                     ts.forEach(node.clauses, generateNames);
                     break;
-                case 266 /* CaseClause */:
-                case 267 /* DefaultClause */:
+                case 266:
+                case 267:
                     ts.forEach(node.statements, generateNames);
                     break;
-                case 230 /* TryStatement */:
+                case 230:
                     generateNames(node.tryBlock);
                     generateNames(node.catchClause);
                     generateNames(node.finallyBlock);
                     break;
-                case 269 /* CatchClause */:
+                case 269:
                     generateNames(node.variableDeclaration);
                     generateNames(node.block);
                     break;
-                case 214 /* VariableStatement */:
+                case 214:
                     generateNames(node.declarationList);
                     break;
-                case 233 /* VariableDeclarationList */:
+                case 233:
                     ts.forEach(node.declarations, generateNames);
                     break;
-                case 232 /* VariableDeclaration */:
-                case 149 /* Parameter */:
-                case 182 /* BindingElement */:
-                case 235 /* ClassDeclaration */:
+                case 232:
+                case 149:
+                case 182:
+                case 235:
                     generateNameIfNeeded(node.name);
                     break;
-                case 234 /* FunctionDeclaration */:
+                case 234:
                     generateNameIfNeeded(node.name);
-                    if (ts.getEmitFlags(node) & 524288 /* ReuseTempVariableScope */) {
+                    if (ts.getEmitFlags(node) & 524288) {
                         ts.forEach(node.parameters, generateNames);
                         generateNames(node.body);
                     }
                     break;
-                case 180 /* ObjectBindingPattern */:
-                case 181 /* ArrayBindingPattern */:
+                case 180:
+                case 181:
                     ts.forEach(node.elements, generateNames);
                     break;
-                case 244 /* ImportDeclaration */:
+                case 244:
                     generateNames(node.importClause);
                     break;
-                case 245 /* ImportClause */:
+                case 245:
                     generateNameIfNeeded(node.name);
                     generateNames(node.namedBindings);
                     break;
-                case 246 /* NamespaceImport */:
+                case 246:
                     generateNameIfNeeded(node.name);
                     break;
-                case 247 /* NamedImports */:
+                case 247:
                     ts.forEach(node.elements, generateNames);
                     break;
-                case 248 /* ImportSpecifier */:
+                case 248:
                     generateNameIfNeeded(node.propertyName || node.name);
                     break;
             }
@@ -80004,12 +64700,12 @@ var ts;
             if (!node)
                 return;
             switch (node.kind) {
-                case 270 /* PropertyAssignment */:
-                case 271 /* ShorthandPropertyAssignment */:
-                case 152 /* PropertyDeclaration */:
-                case 154 /* MethodDeclaration */:
-                case 156 /* GetAccessor */:
-                case 157 /* SetAccessor */:
+                case 270:
+                case 271:
+                case 152:
+                case 154:
+                case 156:
+                case 157:
                     generateNameIfNeeded(node.name);
                     break;
             }
@@ -80024,18 +64720,11 @@ var ts;
                 }
             }
         }
-        /**
-         * Generate the text for a generated identifier.
-         */
         function generateName(name) {
-            if ((name.autoGenerateFlags & 7 /* KindMask */) === 4 /* Node */) {
-                // Node names generate unique names based on their original node
-                // and are cached based on that node's id.
+            if ((name.autoGenerateFlags & 7) === 4) {
                 return generateNameCached(getNodeForGeneratedName(name), name.autoGenerateFlags);
             }
             else {
-                // Auto, Loop, and Unique names are cached based on their unique
-                // autoGenerateId.
                 var autoGenerateId = name.autoGenerateId;
                 return autoGeneratedIdToGeneratedName[autoGenerateId] || (autoGeneratedIdToGeneratedName[autoGenerateId] = makeName(name));
             }
@@ -80044,44 +64733,28 @@ var ts;
             var nodeId = ts.getNodeId(node);
             return nodeIdToGeneratedName[nodeId] || (nodeIdToGeneratedName[nodeId] = generateNameForNode(node, flags));
         }
-        /**
-         * Returns a value indicating whether a name is unique globally, within the current file,
-         * or within the NameGenerator.
-         */
         function isUniqueName(name) {
             return isFileLevelUniqueName(name)
                 && !generatedNames.has(name)
                 && !(reservedNames && reservedNames.has(name));
         }
-        /**
-         * Returns a value indicating whether a name is unique globally or within the current file.
-         */
         function isFileLevelUniqueName(name) {
             return currentSourceFile ? ts.isFileLevelUniqueName(currentSourceFile, name, hasGlobalName) : true;
         }
-        /**
-         * Returns a value indicating whether a name is unique within a container.
-         */
         function isUniqueLocalName(name, container) {
             for (var node = container; ts.isNodeDescendantOf(node, container); node = node.nextContainer) {
                 if (node.locals) {
                     var local = node.locals.get(ts.escapeLeadingUnderscores(name));
-                    // We conservatively include alias symbols to cover cases where they're emitted as locals
-                    if (local && local.flags & (67216319 /* Value */ | 1048576 /* ExportValue */ | 2097152 /* Alias */)) {
+                    if (local && local.flags & (67216319 | 1048576 | 2097152)) {
                         return false;
                     }
                 }
             }
             return true;
         }
-        /**
-         * Return the next available name in the pattern _a ... _z, _0, _1, ...
-         * TempFlags._i or TempFlags._n may be used to express a preference for that dedicated name.
-         * Note that names generated by makeTempVariableName and makeUniqueName will never conflict.
-         */
         function makeTempVariableName(flags, reservedInNestedScopes) {
             if (flags && !(tempFlags & flags)) {
-                var name = flags === 268435456 /* _i */ ? "_i" : "_n";
+                var name = flags === 268435456 ? "_i" : "_n";
                 if (isUniqueName(name)) {
                     tempFlags |= flags;
                     if (reservedInNestedScopes) {
@@ -80091,12 +64764,11 @@ var ts;
                 }
             }
             while (true) {
-                var count = tempFlags & 268435455 /* CountMask */;
+                var count = tempFlags & 268435455;
                 tempFlags++;
-                // Skip over 'i' and 'n'
                 if (count !== 8 && count !== 13) {
                     var name = count < 26
-                        ? "_" + String.fromCharCode(97 /* a */ + count)
+                        ? "_" + String.fromCharCode(97 + count)
                         : "_" + (count - 26);
                     if (isUniqueName(name)) {
                         if (reservedInNestedScopes) {
@@ -80107,13 +64779,6 @@ var ts;
                 }
             }
         }
-        /**
-         * Generate a name that is unique within the current file and doesn't conflict with any names
-         * in global scope. The name is formed by adding an '_n' suffix to the specified base name,
-         * where n is a positive integer. Note that names generated by makeTempVariableName and
-         * makeUniqueName are guaranteed to never conflict.
-         * If `optimistic` is set, the first instance will use 'baseName' verbatim instead of 'baseName_1'
-         */
         function makeUniqueName(baseName, checkFn, optimistic, scoped) {
             if (checkFn === void 0) { checkFn = isUniqueName; }
             if (optimistic) {
@@ -80127,8 +64792,7 @@ var ts;
                     return baseName;
                 }
             }
-            // Find the first unique 'name_n', where n is a positive number
-            if (baseName.charCodeAt(baseName.length - 1) !== 95 /* _ */) {
+            if (baseName.charCodeAt(baseName.length - 1) !== 95) {
                 baseName += "_";
             }
             var i = 1;
@@ -80147,34 +64811,21 @@ var ts;
             }
         }
         function makeFileLevelOptmiisticUniqueName(name) {
-            return makeUniqueName(name, isFileLevelUniqueName, /*optimistic*/ true);
+            return makeUniqueName(name, isFileLevelUniqueName, true);
         }
-        /**
-         * Generates a unique name for a ModuleDeclaration or EnumDeclaration.
-         */
         function generateNameForModuleOrEnum(node) {
             var name = getTextOfNode(node.name);
-            // Use module/enum name itself if it is unique, otherwise make a unique variation
             return isUniqueLocalName(name, node) ? name : makeUniqueName(name);
         }
-        /**
-         * Generates a unique name for an ImportDeclaration or ExportDeclaration.
-         */
         function generateNameForImportOrExportDeclaration(node) {
-            var expr = ts.getExternalModuleName(node); // TODO: GH#18217
+            var expr = ts.getExternalModuleName(node);
             var baseName = ts.isStringLiteral(expr) ?
                 ts.makeIdentifierFromModuleName(expr.text) : "module";
             return makeUniqueName(baseName);
         }
-        /**
-         * Generates a unique name for a default export.
-         */
         function generateNameForExportDefault() {
             return makeUniqueName("default");
         }
-        /**
-         * Generates a unique name for a class expression.
-         */
         function generateNameForClassExpression() {
             return makeUniqueName("class");
         }
@@ -80182,95 +64833,75 @@ var ts;
             if (ts.isIdentifier(node.name)) {
                 return generateNameCached(node.name);
             }
-            return makeTempVariableName(0 /* Auto */);
+            return makeTempVariableName(0);
         }
-        /**
-         * Generates a unique name from a node.
-         */
         function generateNameForNode(node, flags) {
             switch (node.kind) {
-                case 71 /* Identifier */:
-                    return makeUniqueName(getTextOfNode(node), isUniqueName, !!(flags & 16 /* Optimistic */), !!(flags & 8 /* ReservedInNestedScopes */));
-                case 239 /* ModuleDeclaration */:
-                case 238 /* EnumDeclaration */:
+                case 71:
+                    return makeUniqueName(getTextOfNode(node), isUniqueName, !!(flags & 16), !!(flags & 8));
+                case 239:
+                case 238:
                     return generateNameForModuleOrEnum(node);
-                case 244 /* ImportDeclaration */:
-                case 250 /* ExportDeclaration */:
+                case 244:
+                case 250:
                     return generateNameForImportOrExportDeclaration(node);
-                case 234 /* FunctionDeclaration */:
-                case 235 /* ClassDeclaration */:
-                case 249 /* ExportAssignment */:
+                case 234:
+                case 235:
+                case 249:
                     return generateNameForExportDefault();
-                case 205 /* ClassExpression */:
+                case 205:
                     return generateNameForClassExpression();
-                case 154 /* MethodDeclaration */:
-                case 156 /* GetAccessor */:
-                case 157 /* SetAccessor */:
+                case 154:
+                case 156:
+                case 157:
                     return generateNameForMethodOrAccessor(node);
                 default:
-                    return makeTempVariableName(0 /* Auto */);
+                    return makeTempVariableName(0);
             }
         }
-        /**
-         * Generates a unique identifier for a node.
-         */
         function makeName(name) {
-            switch (name.autoGenerateFlags & 7 /* KindMask */) {
-                case 1 /* Auto */:
-                    return makeTempVariableName(0 /* Auto */, !!(name.autoGenerateFlags & 8 /* ReservedInNestedScopes */));
-                case 2 /* Loop */:
-                    return makeTempVariableName(268435456 /* _i */, !!(name.autoGenerateFlags & 8 /* ReservedInNestedScopes */));
-                case 3 /* Unique */:
-                    return makeUniqueName(ts.idText(name), (name.autoGenerateFlags & 32 /* FileLevel */) ? isFileLevelUniqueName : isUniqueName, !!(name.autoGenerateFlags & 16 /* Optimistic */), !!(name.autoGenerateFlags & 8 /* ReservedInNestedScopes */));
+            switch (name.autoGenerateFlags & 7) {
+                case 1:
+                    return makeTempVariableName(0, !!(name.autoGenerateFlags & 8));
+                case 2:
+                    return makeTempVariableName(268435456, !!(name.autoGenerateFlags & 8));
+                case 3:
+                    return makeUniqueName(ts.idText(name), (name.autoGenerateFlags & 32) ? isFileLevelUniqueName : isUniqueName, !!(name.autoGenerateFlags & 16), !!(name.autoGenerateFlags & 8));
             }
             return ts.Debug.fail("Unsupported GeneratedIdentifierKind.");
         }
-        /**
-         * Gets the node from which a name should be generated.
-         */
         function getNodeForGeneratedName(name) {
             var autoGenerateId = name.autoGenerateId;
             var node = name;
             var original = node.original;
             while (original) {
                 node = original;
-                // if "node" is a different generated name (having a different
-                // "autoGenerateId"), use it and stop traversing.
                 if (ts.isIdentifier(node)
-                    && !!(node.autoGenerateFlags & 4 /* Node */)
+                    && !!(node.autoGenerateFlags & 4)
                     && node.autoGenerateId !== autoGenerateId) {
                     break;
                 }
                 original = node.original;
             }
-            // otherwise, return the original node for the source;
             return node;
         }
     }
     ts.createPrinter = createPrinter;
     function createBracketsMap() {
         var brackets = [];
-        brackets[512 /* Braces */] = ["{", "}"];
-        brackets[1024 /* Parenthesis */] = ["(", ")"];
-        brackets[2048 /* AngleBrackets */] = ["<", ">"];
-        brackets[4096 /* SquareBrackets */] = ["[", "]"];
+        brackets[512] = ["{", "}"];
+        brackets[1024] = ["(", ")"];
+        brackets[2048] = ["<", ">"];
+        brackets[4096] = ["[", "]"];
         return brackets;
     }
     function getOpeningBracket(format) {
-        return brackets[format & 7680 /* BracketsMask */][0];
+        return brackets[format & 7680][0];
     }
     function getClosingBracket(format) {
-        return brackets[format & 7680 /* BracketsMask */][1];
-    }
-    // Flags enum to track count of temp variables and a few dedicated names
-    var TempFlags;
-    (function (TempFlags) {
-        TempFlags[TempFlags["Auto"] = 0] = "Auto";
-        TempFlags[TempFlags["CountMask"] = 268435455] = "CountMask";
-        TempFlags[TempFlags["_i"] = 268435456] = "_i";
-    })(TempFlags || (TempFlags = {}));
+        return brackets[format & 7680][1];
+    }
 })(ts || (ts = {}));
-/* @internal */
 var ts;
 (function (ts) {
     function createCachedDirectoryStructureHost(host, currentDirectory, useCaseSensitiveFileNames) {
@@ -80306,17 +64937,12 @@ var ts;
         }
         function createCachedFileSystemEntries(rootDir, rootDirPath) {
             var resultFromHost = {
-                files: ts.map(host.readDirectory(rootDir, /*extensions*/ undefined, /*exclude*/ undefined, /*include*/ ["*.*"]), getBaseNameOfFileName) || [],
+                files: ts.map(host.readDirectory(rootDir, undefined, undefined, ["*.*"]), getBaseNameOfFileName) || [],
                 directories: host.getDirectories(rootDir) || []
             };
             cachedReadDirectoryResult.set(ts.ensureTrailingDirectorySeparator(rootDirPath), resultFromHost);
             return resultFromHost;
         }
-        /**
-         * If the readDirectory result was already cached, it returns that
-         * Otherwise gets result from host and caches it.
-         * The host request is done under try catch block to avoid caching incorrect result
-         */
         function tryReadDirectory(rootDir, rootDirPath) {
             rootDirPath = ts.ensureTrailingDirectorySeparator(rootDirPath);
             var cachedResult = getCachedFileSystemEntries(rootDirPath);
@@ -80327,7 +64953,6 @@ var ts;
                 return createCachedFileSystemEntries(rootDir, rootDirPath);
             }
             catch (_e) {
-                // If there is exception to read directories, dont cache the result and direct the calls to host
                 ts.Debug.assert(!cachedReadDirectoryResult.has(ts.ensureTrailingDirectorySeparator(rootDirPath)));
                 return undefined;
             }
@@ -80352,7 +64977,7 @@ var ts;
             var path = toPath(fileName);
             var result = getCachedFileSystemEntriesForBaseDir(path);
             if (result) {
-                updateFilesOfFileSystemEntry(result, getBaseNameOfFileName(fileName), /*fileExists*/ true);
+                updateFilesOfFileSystemEntry(result, getBaseNameOfFileName(fileName), true);
             }
             return host.writeFile(fileName, data, writeByteOrderMark);
         }
@@ -80371,7 +64996,7 @@ var ts;
             var result = getCachedFileSystemEntriesForBaseDir(path);
             var baseFileName = getBaseNameOfFileName(dirPath);
             if (result) {
-                updateFileSystemEntry(result.directories, baseFileName, /*isValid*/ true);
+                updateFileSystemEntry(result.directories, baseFileName, true);
             }
             host.createDirectory(dirPath);
         }
@@ -80401,8 +65026,6 @@ var ts;
         function addOrDeleteFileOrDirectory(fileOrDirectory, fileOrDirectoryPath) {
             var existingResult = getCachedFileSystemEntries(fileOrDirectoryPath);
             if (existingResult) {
-                // Just clear the cache for now
-                // For now just clear the cache, since this could mean that multiple level entries might need to be re-evaluated
                 clearCache();
                 return undefined;
             }
@@ -80410,10 +65033,7 @@ var ts;
             if (!parentResult) {
                 return undefined;
             }
-            // This was earlier a file (hence not in cached directory contents)
-            // or we never cached the directory containing it
             if (!host.directoryExists) {
-                // Since host doesnt support directory exists, clear the cache as otherwise it might not be same
                 clearCache();
                 return undefined;
             }
@@ -80423,11 +65043,9 @@ var ts;
                 directoryExists: host.directoryExists(fileOrDirectoryPath)
             };
             if (fsQueryResult.directoryExists || hasEntry(parentResult.directories, baseName)) {
-                // Folder added or removed, clear the cache instead of updating the folder and its structure
                 clearCache();
             }
             else {
-                // No need to update the directory structure, just files
                 updateFilesOfFileSystemEntry(parentResult, baseName, fsQueryResult.fileExists);
             }
             return fsQueryResult;
@@ -80452,51 +65070,31 @@ var ts;
     var ConfigFileProgramReloadLevel;
     (function (ConfigFileProgramReloadLevel) {
         ConfigFileProgramReloadLevel[ConfigFileProgramReloadLevel["None"] = 0] = "None";
-        /** Update the file name list from the disk */
         ConfigFileProgramReloadLevel[ConfigFileProgramReloadLevel["Partial"] = 1] = "Partial";
-        /** Reload completely by re-reading contents of config file from disk and updating program */
         ConfigFileProgramReloadLevel[ConfigFileProgramReloadLevel["Full"] = 2] = "Full";
     })(ConfigFileProgramReloadLevel = ts.ConfigFileProgramReloadLevel || (ts.ConfigFileProgramReloadLevel = {}));
-    /**
-     * Updates the existing missing file watches with the new set of missing files after new program is created
-     */
     function updateMissingFilePathsWatch(program, missingFileWatches, createMissingFileWatch) {
         var missingFilePaths = program.getMissingFilePaths();
         var newMissingFilePathMap = ts.arrayToSet(missingFilePaths);
-        // Update the missing file paths watcher
         ts.mutateMap(missingFileWatches, newMissingFilePathMap, {
-            // Watch the missing files
             createNewValue: createMissingFileWatch,
-            // Files that are no longer missing (e.g. because they are no longer required)
-            // should no longer be watched.
             onDeleteValue: ts.closeFileWatcher
         });
     }
     ts.updateMissingFilePathsWatch = updateMissingFilePathsWatch;
-    /**
-     * Updates the existing wild card directory watches with the new set of wild card directories from the config file
-     * after new program is created because the config file was reloaded or program was created first time from the config file
-     * Note that there is no need to call this function when the program is updated with additional files without reloading config files,
-     * as wildcard directories wont change unless reloading config file
-     */
     function updateWatchingWildcardDirectories(existingWatchedForWildcards, wildcardDirectories, watchDirectory) {
         ts.mutateMap(existingWatchedForWildcards, wildcardDirectories, {
-            // Create new watch and recursive info
             createNewValue: createWildcardDirectoryWatcher,
-            // Close existing watch thats not needed any more
             onDeleteValue: closeFileWatcherOf,
-            // Close existing watch that doesnt match in the flags
             onExistingValue: updateWildcardDirectoryWatcher
         });
         function createWildcardDirectoryWatcher(directory, flags) {
-            // Create new watch and recursive info
             return {
                 watcher: watchDirectory(directory, flags),
                 flags: flags
             };
         }
         function updateWildcardDirectoryWatcher(existingWatcher, flags, directory) {
-            // Watcher needs to be updated if the recursive flags dont match
             if (existingWatcher.flags === flags) {
                 return;
             }
@@ -80528,13 +65126,13 @@ var ts;
         var createDirectoryWatcher = getCreateFileWatcher(watchLogLevel, watchDirectory);
         return {
             watchFile: function (host, file, callback, pollingInterval, detailInfo1, detailInfo2) {
-                return createFileWatcher(host, file, callback, pollingInterval, /*passThrough*/ undefined, detailInfo1, detailInfo2, watchFile, log, "FileWatcher", getDetailWatchInfo);
+                return createFileWatcher(host, file, callback, pollingInterval, undefined, detailInfo1, detailInfo2, watchFile, log, "FileWatcher", getDetailWatchInfo);
             },
             watchFilePath: function (host, file, callback, pollingInterval, path, detailInfo1, detailInfo2) {
                 return createFilePathWatcher(host, file, callback, pollingInterval, path, detailInfo1, detailInfo2, watchFile, log, "FileWatcher", getDetailWatchInfo);
             },
             watchDirectory: function (host, directory, callback, flags, detailInfo1, detailInfo2) {
-                return createDirectoryWatcher(host, directory, callback, flags, /*passThrough*/ undefined, detailInfo1, detailInfo2, watchDirectory, log, "DirectoryWatcher", getDetailWatchInfo);
+                return createDirectoryWatcher(host, directory, callback, flags, undefined, detailInfo1, detailInfo2, watchDirectory, log, "DirectoryWatcher", getDetailWatchInfo);
             }
         };
         function watchFilePath(host, file, callback, pollingInterval, path) {
@@ -80545,7 +65143,7 @@ var ts;
         return host.watchFile(file, callback, pollingInterval);
     }
     function watchDirectory(host, directory, callback, flags) {
-        return host.watchDirectory(directory, callback, (flags & 1 /* Recursive */) !== 0);
+        return host.watchDirectory(directory, callback, (flags & 1) !== 0);
     }
     function getCreateFileWatcher(watchLogLevel, addWatch) {
         switch (watchLogLevel) {
@@ -80602,15 +65200,12 @@ var ts;
         return ts.normalizePath(referencedFileName);
     }
     ts.resolveTripleslashReference = resolveTripleslashReference;
-    /* @internal */
     function computeCommonSourceDirectoryOfFilenames(fileNames, currentDirectory, getCanonicalFileName) {
         var commonPathComponents;
         var failed = ts.forEach(fileNames, function (sourceFile) {
-            // Each file contributes into common source file path
             var sourcePathComponents = ts.getNormalizedPathComponents(sourceFile, currentDirectory);
-            sourcePathComponents.pop(); // The base file name is not part of the common directory path
+            sourcePathComponents.pop();
             if (!commonPathComponents) {
-                // first file
                 commonPathComponents = sourcePathComponents;
                 return;
             }
@@ -80618,24 +65213,20 @@ var ts;
             for (var i = 0; i < n; i++) {
                 if (getCanonicalFileName(commonPathComponents[i]) !== getCanonicalFileName(sourcePathComponents[i])) {
                     if (i === 0) {
-                        // Failed to find any common path component
                         return true;
                     }
-                    // New common path found that is 0 -> i-1
                     commonPathComponents.length = i;
                     break;
                 }
             }
-            // If the sourcePathComponents was shorter than the commonPathComponents, truncate to the sourcePathComponents
             if (sourcePathComponents.length < commonPathComponents.length) {
                 commonPathComponents.length = sourcePathComponents.length;
             }
         });
-        // A common path can not be found when paths span multiple drives on windows, for example
         if (failed) {
             return "";
         }
-        if (!commonPathComponents) { // Can happen when all input files are .d.ts files
+        if (!commonPathComponents) {
             return currentDirectory;
         }
         return ts.getPathFromPathComponents(commonPathComponents);
@@ -80644,8 +65235,6 @@ var ts;
     function createCompilerHost(options, setParentNodes) {
         var existingDirectories = ts.createMap();
         function getCanonicalFileName(fileName) {
-            // if underlying system can distinguish between two files whose names differs only in cases then file name already in canonical form.
-            // otherwise use toLowerCase as a canonical form.
             return ts.sys.useCaseSensitiveFileNames ? fileName : fileName.toLowerCase();
         }
         function getSourceFile(fileName, languageVersion, onError) {
@@ -80686,11 +65275,10 @@ var ts;
             if (!outputFingerprints) {
                 outputFingerprints = ts.createMap();
             }
-            var hash = ts.sys.createHash(data); // TODO: GH#18217
-            var mtimeBefore = ts.sys.getModifiedTime(fileName); // TODO: GH#18217
+            var hash = ts.sys.createHash(data);
+            var mtimeBefore = ts.sys.getModifiedTime(fileName);
             if (mtimeBefore) {
                 var fingerprint = outputFingerprints.get(fileName);
-                // If output has not been changed, and the file has no external modification
                 if (fingerprint &&
                     fingerprint.byteOrderMark === writeByteOrderMark &&
                     fingerprint.hash === hash &&
@@ -80699,7 +65287,7 @@ var ts;
                 }
             }
             ts.sys.writeFile(fileName, data, writeByteOrderMark);
-            var mtimeAfter = ts.sys.getModifiedTime(fileName); // TODO: GH#18217
+            var mtimeAfter = ts.sys.getModifiedTime(fileName);
             outputFingerprints.set(fileName, {
                 hash: hash,
                 byteOrderMark: writeByteOrderMark,
@@ -80773,7 +65361,7 @@ var ts;
     function formatDiagnostic(diagnostic, host) {
         var errorMessage = ts.diagnosticCategoryName(diagnostic) + " TS" + diagnostic.code + ": " + flattenDiagnosticMessageText(diagnostic.messageText, host.getNewLine()) + host.getNewLine();
         if (diagnostic.file) {
-            var _a = ts.getLineAndCharacterOfPosition(diagnostic.file, diagnostic.start), line = _a.line, character = _a.character; // TODO: GH#18217
+            var _a = ts.getLineAndCharacterOfPosition(diagnostic.file, diagnostic.start), line = _a.line, character = _a.character;
             var fileName = diagnostic.file.fileName;
             var relativeFileName = ts.convertToRelativePath(fileName, host.getCurrentDirectory(), function (fileName) { return host.getCanonicalFileName(fileName); });
             return relativeFileName + "(" + (line + 1) + "," + (character + 1) + "): " + errorMessage;
@@ -80781,7 +65369,6 @@ var ts;
         return errorMessage;
     }
     ts.formatDiagnostic = formatDiagnostic;
-    /** @internal */
     var ForegroundColorEscapeSequences;
     (function (ForegroundColorEscapeSequences) {
         ForegroundColorEscapeSequences["Grey"] = "\u001B[90m";
@@ -80802,7 +65389,6 @@ var ts;
             case ts.DiagnosticCategory.Message: return ForegroundColorEscapeSequences.Blue;
         }
     }
-    /** @internal */
     function formatColorAndReset(text, formatStyle) {
         return formatStyle + text + resetEscapeSequence;
     }
@@ -80820,7 +65406,7 @@ var ts;
             var context = "";
             if (diagnostic.file) {
                 var start = diagnostic.start, length_4 = diagnostic.length, file = diagnostic.file;
-                var _a = ts.getLineAndCharacterOfPosition(file, start), firstLine = _a.line, firstLineChar = _a.character; // TODO: GH#18217
+                var _a = ts.getLineAndCharacterOfPosition(file, start), firstLine = _a.line, firstLineChar = _a.character;
                 var _b = ts.getLineAndCharacterOfPosition(file, start + length_4), lastLine = _b.line, lastLineChar = _b.character;
                 var lastLineInFile = ts.getLineAndCharacterOfPosition(file, file.text.length).line;
                 var relativeFileName = host ? ts.convertToRelativePath(file.fileName, host.getCurrentDirectory(), function (fileName) { return host.getCanonicalFileName(fileName); }) : file.fileName;
@@ -80831,8 +65417,6 @@ var ts;
                 }
                 for (var i = firstLine; i <= lastLine; i++) {
                     context += host.getNewLine();
-                    // If the error spans over 5 lines, we'll only show the first 2 and last 2 lines,
-                    // so we'll skip ahead to the second-to-last line.
                     if (hasMoreThanFiveLines && firstLine + 1 < i && i < lastLine - 1) {
                         context += formatColorAndReset(padLeft(ellipsis, gutterWidth), gutterStyleSequence) + gutterSeparator + host.getNewLine();
                         i = lastLine - 1;
@@ -80840,17 +65424,13 @@ var ts;
                     var lineStart = ts.getPositionOfLineAndCharacter(file, i, 0);
                     var lineEnd = i < lastLineInFile ? ts.getPositionOfLineAndCharacter(file, i + 1, 0) : file.text.length;
                     var lineContent = file.text.slice(lineStart, lineEnd);
-                    lineContent = lineContent.replace(/\s+$/g, ""); // trim from end
-                    lineContent = lineContent.replace("\t", " "); // convert tabs to single spaces
-                    // Output the gutter and the actual contents of the line.
+                    lineContent = lineContent.replace(/\s+$/g, "");
+                    lineContent = lineContent.replace("\t", " ");
                     context += formatColorAndReset(padLeft(i + 1 + "", gutterWidth), gutterStyleSequence) + gutterSeparator;
                     context += lineContent + host.getNewLine();
-                    // Output the gutter and the error span for the line using tildes.
                     context += formatColorAndReset(padLeft("", gutterWidth), gutterStyleSequence) + gutterSeparator;
                     context += ForegroundColorEscapeSequences.Red;
                     if (i === firstLine) {
-                        // If we're on the last line, then limit it to the last character of the last line.
-                        // Otherwise, we'll just squiggle the rest of the line, giving 'slice' no end position.
                         var lastCharForLine = i === lastLine ? lastLineChar : undefined;
                         context += lineContent.slice(0, firstLineChar).replace(/\S/g, " ");
                         context += lineContent.slice(firstLineChar, lastCharForLine).replace(/./g, "~");
@@ -80859,7 +65439,6 @@ var ts;
                         context += lineContent.slice(0, lastLineChar).replace(/./g, "~");
                     }
                     else {
-                        // Squiggle the entire line.
                         context += lineContent.replace(/./g, "~");
                     }
                     context += resetEscapeSequence;
@@ -80925,34 +65504,23 @@ var ts;
         }
         return resolutions;
     }
-    /**
-     * Determines if program structure is upto date or needs to be recreated
-     */
-    /* @internal */
     function isProgramUptoDate(program, rootFileNames, newOptions, getSourceVersion, fileExists, hasInvalidatedResolution, hasChangedAutomaticTypeDirectiveNames) {
-        // If we haven't created a program yet or have changed automatic type directives, then it is not up-to-date
         if (!program || hasChangedAutomaticTypeDirectiveNames) {
             return false;
         }
-        // If number of files in the program do not match, it is not up-to-date
         if (program.getRootFileNames().length !== rootFileNames.length) {
             return false;
         }
-        // If any file is not up-to-date, then the whole program is not up-to-date
         if (program.getSourceFiles().some(sourceFileNotUptoDate)) {
             return false;
         }
-        // If any of the missing file paths are now created
         if (program.getMissingFilePaths().some(fileExists)) {
             return false;
         }
         var currentOptions = program.getCompilerOptions();
-        // If the compilation settings do no match, then the program is not up-to-date
         if (!ts.compareDataObjects(currentOptions, newOptions)) {
             return false;
         }
-        // If everything matches but the text of config file is changed,
-        // error locations can change for program options, so update the program
         if (currentOptions.configFile && newOptions.configFile) {
             return currentOptions.configFile.text === newOptions.configFile.text;
         }
@@ -80968,12 +65536,7 @@ var ts;
             configFileParseResult.errors;
     }
     ts.getConfigFileParsingDiagnostics = getConfigFileParsingDiagnostics;
-    /**
-     * Determined if source file needs to be re-created even if its text hasn't changed
-     */
     function shouldProgramCreateNewSourceFiles(program, newOptions) {
-        // If any of these options change, we can't reuse old source file even if version match
-        // The change in options like these could result in change in syntax tree change
         var oldOptions = program && program.getCompilerOptions();
         return oldOptions && (oldOptions.target !== newOptions.target ||
             oldOptions.module !== newOptions.module ||
@@ -80995,7 +65558,7 @@ var ts;
         };
     }
     function createProgram(rootNamesOrOptions, _options, _host, _oldProgram, _configFileParsingDiagnostics) {
-        var createProgramOptions = ts.isArray(rootNamesOrOptions) ? createCreateProgramOptions(rootNamesOrOptions, _options, _host, _oldProgram, _configFileParsingDiagnostics) : rootNamesOrOptions; // TODO: GH#18217
+        var createProgramOptions = ts.isArray(rootNamesOrOptions) ? createCreateProgramOptions(rootNamesOrOptions, _options, _host, _oldProgram, _configFileParsingDiagnostics) : rootNamesOrOptions;
         var rootNames = createProgramOptions.rootNames, options = createProgramOptions.options, configFileParsingDiagnostics = createProgramOptions.configFileParsingDiagnostics, projectReferences = createProgramOptions.projectReferences;
         var oldProgram = createProgramOptions.oldProgram;
         var program;
@@ -81011,19 +65574,9 @@ var ts;
         var cachedDeclarationDiagnosticsForFile = {};
         var resolvedTypeReferenceDirectives = ts.createMap();
         var fileProcessingDiagnostics = ts.createDiagnosticCollection();
-        // The below settings are to track if a .js file should be add to the program if loaded via searching under node_modules.
-        // This works as imported modules are discovered recursively in a depth first manner, specifically:
-        // - For each root file, findSourceFile is called.
-        // - This calls processImportedModules for each module imported in the source file.
-        // - This calls resolveModuleNames, and then calls findSourceFile for each resolved module.
-        // As all these operations happen - and are nested - within the createProgram call, they close over the below variables.
-        // The current resolution depth is tracked by incrementing/decrementing as the depth first search progresses.
         var maxNodeModuleJsDepth = typeof options.maxNodeModuleJsDepth === "number" ? options.maxNodeModuleJsDepth : 0;
         var currentNodeModulesDepth = 0;
-        // If a module has some of its imports skipped due to being at the depth limit under node_modules, then track
-        // this, as it may be imported at a shallower depth later, and then it will need its skipped imports processed.
         var modulesWithElidedImports = ts.createMap();
-        // Track source files that are source files found by searching under node_modules, as these shouldn't be compiled.
         var sourceFilesFoundSearchingNodeModules = ts.createMap();
         ts.performance.mark("beforeProgram");
         var host = createProgramOptions.host || createCompilerHost(options);
@@ -81034,7 +65587,6 @@ var ts;
         var programDiagnostics = ts.createDiagnosticCollection();
         var currentDirectory = host.getCurrentDirectory();
         var supportedExtensions = ts.getSupportedExtensions(options);
-        // Map storing if there is emit blocking diagnostics for given input
         var hasEmitBlockingDiagnostics = ts.createMap();
         var _compilerOptionsObjectLiteralSyntax;
         var _referencesArrayLiteralSyntax;
@@ -81043,7 +65595,6 @@ var ts;
         var hasInvalidatedResolution = host.hasInvalidatedResolution || ts.returnFalse;
         if (host.resolveModuleNames) {
             resolveModuleNamesWorker = function (moduleNames, containingFile, reusedNames) { return host.resolveModuleNames(ts.Debug.assertEachDefined(moduleNames), containingFile, reusedNames).map(function (resolved) {
-                // An older host may have omitted extension, in which case we should infer it from the file extension of resolvedFileName.
                 if (!resolved || resolved.extension !== undefined) {
                     return resolved;
                 }
@@ -81054,7 +65605,7 @@ var ts;
         }
         else {
             moduleResolutionCache = ts.createModuleResolutionCache(currentDirectory, function (x) { return host.getCanonicalFileName(x); });
-            var loader_1 = function (moduleName, containingFile) { return ts.resolveModuleName(moduleName, containingFile, options, host, moduleResolutionCache).resolvedModule; }; // TODO: GH#18217
+            var loader_1 = function (moduleName, containingFile) { return ts.resolveModuleName(moduleName, containingFile, options, host, moduleResolutionCache).resolvedModule; };
             resolveModuleNamesWorker = function (moduleNames, containingFile) { return loadWithLocalCache(ts.Debug.assertEachDefined(moduleNames), containingFile, loader_1); };
         }
         var resolveTypeReferenceDirectiveNamesWorker;
@@ -81062,27 +65613,20 @@ var ts;
             resolveTypeReferenceDirectiveNamesWorker = function (typeDirectiveNames, containingFile) { return host.resolveTypeReferenceDirectives(ts.Debug.assertEachDefined(typeDirectiveNames), containingFile); };
         }
         else {
-            var loader_2 = function (typesRef, containingFile) { return ts.resolveTypeReferenceDirective(typesRef, containingFile, options, host).resolvedTypeReferenceDirective; }; // TODO: GH#18217
+            var loader_2 = function (typesRef, containingFile) { return ts.resolveTypeReferenceDirective(typesRef, containingFile, options, host).resolvedTypeReferenceDirective; };
             resolveTypeReferenceDirectiveNamesWorker = function (typeReferenceDirectiveNames, containingFile) { return loadWithLocalCache(ts.Debug.assertEachDefined(typeReferenceDirectiveNames), containingFile, loader_2); };
         }
-        // Map from a stringified PackageId to the source file with that id.
-        // Only one source file may have a given packageId. Others become redirects (see createRedirectSourceFile).
-        // `packageIdToSourceFile` is only used while building the program, while `sourceFileToPackageName` and `isSourceFileTargetOfRedirect` are kept around.
         var packageIdToSourceFile = ts.createMap();
-        // Maps from a SourceFile's `.path` to the name of the package it was imported with.
         var sourceFileToPackageName = ts.createMap();
         var redirectTargetsSet = ts.createMap();
         var filesByName = ts.createMap();
         var missingFilePaths;
-        // stores 'filename -> file association' ignoring case
-        // used to track cases when two file names differ only in casing
         var filesByNameIgnoreCase = host.useCaseSensitiveFileNames() ? ts.createMap() : undefined;
-        // A parallel array to projectReferences storing the results of reading in the referenced tsconfig files
         var resolvedProjectReferences = projectReferences ? [] : undefined;
         var projectReferenceRedirects = ts.createMap();
         var shouldCreateNewSourceFile = shouldProgramCreateNewSourceFiles(oldProgram, options);
         var structuralIsReused = tryReuseStructureFromOldProgram();
-        if (structuralIsReused !== 2 /* Completely */) {
+        if (structuralIsReused !== 2) {
             processingDefaultLibFiles = [];
             processingOtherFiles = [];
             if (projectReferences) {
@@ -81093,17 +65637,15 @@ var ts;
                     if (parsedRef) {
                         if (parsedRef.commandLine.options.outFile) {
                             var dtsOutfile = ts.changeExtension(parsedRef.commandLine.options.outFile, ".d.ts");
-                            processSourceFile(dtsOutfile, /*isDefaultLib*/ false, /*ignoreNoDefaultLib*/ false, /*packageId*/ undefined);
+                            processSourceFile(dtsOutfile, false, false, undefined);
                         }
                         addProjectReferenceRedirects(parsedRef.commandLine, projectReferenceRedirects);
                     }
                 }
             }
-            ts.forEach(rootNames, function (name) { return processRootFile(name, /*isDefaultLib*/ false, /*ignoreNoDefaultLib*/ false); });
-            // load type declarations specified via 'types' argument or implicitly from types/ and node_modules/@types folders
+            ts.forEach(rootNames, function (name) { return processRootFile(name, false, false); });
             var typeReferences = ts.getAutomaticTypeDirectiveNames(options, host);
             if (typeReferences.length) {
-                // This containingFilename needs to match with the one used in managed-side
                 var containingDirectory = options.configFilePath ? ts.getDirectoryPath(options.configFilePath) : host.getCurrentDirectory();
                 var containingFilename = ts.combinePaths(containingDirectory, "__inferred type names__.ts");
                 var resolutions = resolveTypeReferenceDirectiveNamesWorker(typeReferences, containingFilename);
@@ -81111,20 +65653,14 @@ var ts;
                     processTypeReferenceDirective(typeReferences[i], resolutions[i]);
                 }
             }
-            // Do not process the default library if:
-            //  - The '--noLib' flag is used.
-            //  - A 'no-default-lib' reference comment is encountered in
-            //      processing the root files.
             if (!skipDefaultLib) {
-                // If '--lib' is not specified, include default library file according to '--target'
-                // otherwise, using options specified in '--lib' instead of '--target' default library file
                 var defaultLibraryFileName = getDefaultLibraryFileName();
                 if (!options.lib && defaultLibraryFileName) {
-                    processRootFile(defaultLibraryFileName, /*isDefaultLib*/ true, /*ignoreNoDefaultLib*/ false);
+                    processRootFile(defaultLibraryFileName, true, false);
                 }
                 else {
                     ts.forEach(options.lib, function (libFileName) {
-                        processRootFile(ts.combinePaths(defaultLibraryPath, libFileName), /*isDefaultLib*/ true, /*ignoreNoDefaultLib*/ false);
+                        processRootFile(ts.combinePaths(defaultLibraryPath, libFileName), true, false);
                     });
                 }
             }
@@ -81134,8 +65670,6 @@ var ts;
             processingOtherFiles = undefined;
         }
         ts.Debug.assert(!!missingFilePaths);
-        // Release any files we have acquired in the old program but are
-        // not part of the new program.
         if (oldProgram && host.onReleaseOldSourceFile) {
             var oldSourceFiles = oldProgram.getSourceFiles();
             for (var _a = 0, oldSourceFiles_1 = oldSourceFiles; _a < oldSourceFiles_1.length; _a++) {
@@ -81145,7 +65679,6 @@ var ts;
                 }
             }
         }
-        // unconditionally set oldProgram to undefined to prevent it from being captured in closure
         oldProgram = undefined;
         program = {
             getRootFileNames: function () { return rootNames; },
@@ -81192,7 +65725,7 @@ var ts;
             return ts.compareValues(getDefaultLibFilePriority(a), getDefaultLibFilePriority(b));
         }
         function getDefaultLibFilePriority(a) {
-            if (ts.containsPath(defaultLibraryPath, a.fileName, /*ignoreCase*/ false)) {
+            if (ts.containsPath(defaultLibraryPath, a.fileName, false)) {
                 var basename = ts.getBaseFileName(a.fileName);
                 if (basename === "lib.d.ts" || basename === "lib.es6.d.ts")
                     return 0;
@@ -81213,21 +65746,16 @@ var ts;
             if (commonSourceDirectory === undefined) {
                 var emittedFiles = ts.filter(files, function (file) { return ts.sourceFileMayBeEmitted(file, options, isSourceFileFromExternalLibrary); });
                 if (options.rootDir && checkSourceFilesBelongToPath(emittedFiles, options.rootDir)) {
-                    // If a rootDir is specified use it as the commonSourceDirectory
                     commonSourceDirectory = ts.getNormalizedAbsolutePath(options.rootDir, currentDirectory);
                 }
                 else if (options.composite) {
-                    // Project compilations never infer their root from the input source paths
-                    commonSourceDirectory = ts.getDirectoryPath(ts.normalizeSlashes(options.configFilePath)); // TODO: GH#18217
+                    commonSourceDirectory = ts.getDirectoryPath(ts.normalizeSlashes(options.configFilePath));
                     checkSourceFilesBelongToPath(emittedFiles, commonSourceDirectory);
                 }
                 else {
                     commonSourceDirectory = computeCommonSourceDirectory(emittedFiles);
                 }
                 if (commonSourceDirectory && commonSourceDirectory[commonSourceDirectory.length - 1] !== ts.directorySeparator) {
-                    // Make sure directory path ends with directory separator so this string can directly
-                    // used to replace with "" to get the relative path of the source file and the relative path doesn't
-                    // start with / making it rooted path
                     commonSourceDirectory += ts.directorySeparator;
                 }
             }
@@ -81235,7 +65763,6 @@ var ts;
         }
         function getClassifiableNames() {
             if (!classifiableNames) {
-                // Initialize a checker so that all our files are bound.
                 getTypeChecker();
                 classifiableNames = ts.createUnderscoreEscapedMap();
                 for (var _i = 0, files_2 = files; _i < files_2.length; _i++) {
@@ -81246,51 +65773,25 @@ var ts;
             return classifiableNames;
         }
         function resolveModuleNamesReusingOldState(moduleNames, containingFile, file, oldProgramState) {
-            if (structuralIsReused === 0 /* Not */ && !file.ambientModuleNames.length) {
-                // If the old program state does not permit reusing resolutions and `file` does not contain locally defined ambient modules,
-                // the best we can do is fallback to the default logic.
+            if (structuralIsReused === 0 && !file.ambientModuleNames.length) {
                 return resolveModuleNamesWorker(moduleNames, containingFile);
             }
             var oldSourceFile = oldProgramState.program && oldProgramState.program.getSourceFile(containingFile);
             if (oldSourceFile !== file && file.resolvedModules) {
-                // `file` was created for the new program.
-                //
-                // We only set `file.resolvedModules` via work from the current function,
-                // so it is defined iff we already called the current function on `file`.
-                // That call happened no later than the creation of the `file` object,
-                // which per above occurred during the current program creation.
-                // Since we assume the filesystem does not change during program creation,
-                // it is safe to reuse resolutions from the earlier call.
-                var result_3 = [];
+                var result_4 = [];
                 for (var _i = 0, moduleNames_1 = moduleNames; _i < moduleNames_1.length; _i++) {
                     var moduleName = moduleNames_1[_i];
                     var resolvedModule = file.resolvedModules.get(moduleName);
-                    result_3.push(resolvedModule);
+                    result_4.push(resolvedModule);
                 }
-                return result_3;
+                return result_4;
             }
-            // At this point, we know at least one of the following hold:
-            // - file has local declarations for ambient modules
-            // - old program state is available
-            // With this information, we can infer some module resolutions without performing resolution.
-            /** An ordered list of module names for which we cannot recover the resolution. */
             var unknownModuleNames;
-            /**
-             * The indexing of elements in this list matches that of `moduleNames`.
-             *
-             * Before combining results, result[i] is in one of the following states:
-             * * undefined: needs to be recomputed,
-             * * predictedToResolveToAmbientModuleMarker: known to be an ambient module.
-             * Needs to be reset to undefined before returning,
-             * * ResolvedModuleFull instance: can be reused.
-             */
             var result;
             var reusedNames;
-            /** A transient placeholder used to mark predicted resolution in the result list. */
             var predictedToResolveToAmbientModuleMarker = {};
             for (var i = 0; i < moduleNames.length; i++) {
                 var moduleName = moduleNames[i];
-                // If the source file is unchanged and doesnt have invalidated resolution, reuse the module resolutions
                 if (file === oldSourceFile && !hasInvalidatedResolution(oldSourceFile.path)) {
                     var oldResolvedModule = oldSourceFile && oldSourceFile.resolvedModules.get(moduleName);
                     if (oldResolvedModule) {
@@ -81302,10 +65803,6 @@ var ts;
                         continue;
                     }
                 }
-                // We know moduleName resolves to an ambient module provided that moduleName:
-                // - is in the list of ambient modules locally declared in the current source file.
-                // - resolved to an ambient module in the old program whose declaration is in an unmodified file
-                //   (so the same module declaration will land in the new program)
                 var resolvesToAmbientModuleInNonModifiedFile = false;
                 if (ts.contains(file.ambientModuleNames, moduleName)) {
                     resolvesToAmbientModuleInNonModifiedFile = true;
@@ -81320,26 +65817,21 @@ var ts;
                     (result || (result = new Array(moduleNames.length)))[i] = predictedToResolveToAmbientModuleMarker;
                 }
                 else {
-                    // Resolution failed in the old program, or resolved to an ambient module for which we can't reuse the result.
                     (unknownModuleNames || (unknownModuleNames = [])).push(moduleName);
                 }
             }
             var resolutions = unknownModuleNames && unknownModuleNames.length
                 ? resolveModuleNamesWorker(unknownModuleNames, containingFile, reusedNames)
                 : ts.emptyArray;
-            // Combine results of resolutions and predicted results
             if (!result) {
-                // There were no unresolved/ambient resolutions.
                 ts.Debug.assert(resolutions.length === moduleNames.length);
                 return resolutions;
             }
             var j = 0;
             for (var i = 0; i < result.length; i++) {
                 if (result[i]) {
-                    // `result[i]` is either a `ResolvedModuleFull` or a marker.
-                    // If it is the former, we can leave it as is.
                     if (result[i] === predictedToResolveToAmbientModuleMarker) {
-                        result[i] = undefined; // TODO: GH#18217
+                        result[i] = undefined;
                     }
                 }
                 else {
@@ -81349,23 +65841,16 @@ var ts;
             }
             ts.Debug.assert(j === resolutions.length);
             return result;
-            // If we change our policy of rechecking failed lookups on each program create,
-            // we should adjust the value returned here.
             function moduleNameResolvesToAmbientModuleInNonModifiedFile(moduleName, oldProgramState) {
-                var resolutionToFile = ts.getResolvedModule(oldProgramState.oldSourceFile, moduleName); // TODO: GH#18217
+                var resolutionToFile = ts.getResolvedModule(oldProgramState.oldSourceFile, moduleName);
                 var resolvedFile = resolutionToFile && oldProgramState.program && oldProgramState.program.getSourceFile(resolutionToFile.resolvedFileName);
                 if (resolutionToFile && resolvedFile && !resolvedFile.externalModuleIndicator) {
-                    // In the old program, we resolved to an ambient module that was in the same
-                    //   place as we expected to find an actual module file.
-                    // We actually need to return 'false' here even though this seems like a 'true' case
-                    //   because the normal module resolution algorithm will find this anyway.
                     return false;
                 }
                 var ambientModule = oldProgramState.program && oldProgramState.program.getTypeChecker().tryFindAmbientModuleWithoutAugmentations(moduleName);
                 if (!(ambientModule && ambientModule.declarations)) {
                     return false;
                 }
-                // at least one of declarations should come from non-modified source file
                 var firstUnmodifiedFile = ts.forEach(ambientModule.declarations, function (d) {
                     var f = ts.getSourceFileOfNode(d);
                     return !ts.contains(oldProgramState.modifiedFilePaths, f.path) && f;
@@ -81381,93 +65866,74 @@ var ts;
         }
         function tryReuseStructureFromOldProgram() {
             if (!oldProgram) {
-                return 0 /* Not */;
+                return 0;
             }
-            // check properties that can affect structure of the program or module resolution strategy
-            // if any of these properties has changed - structure cannot be reused
             var oldOptions = oldProgram.getCompilerOptions();
             if (ts.changesAffectModuleResolution(oldOptions, options)) {
-                return oldProgram.structureIsReused = 0 /* Not */;
+                return oldProgram.structureIsReused = 0;
             }
-            ts.Debug.assert(!(oldProgram.structureIsReused & (2 /* Completely */ | 1 /* SafeModules */)));
-            // there is an old program, check if we can reuse its structure
+            ts.Debug.assert(!(oldProgram.structureIsReused & (2 | 1)));
             var oldRootNames = oldProgram.getRootFileNames();
             if (!ts.arrayIsEqualTo(oldRootNames, rootNames)) {
-                return oldProgram.structureIsReused = 0 /* Not */;
+                return oldProgram.structureIsReused = 0;
             }
             if (!ts.arrayIsEqualTo(options.types, oldOptions.types)) {
-                return oldProgram.structureIsReused = 0 /* Not */;
+                return oldProgram.structureIsReused = 0;
             }
-            // Check if any referenced project tsconfig files are different
             var oldRefs = oldProgram.getProjectReferences();
             if (projectReferences) {
                 if (!oldRefs) {
-                    return oldProgram.structureIsReused = 0 /* Not */;
+                    return oldProgram.structureIsReused = 0;
                 }
                 for (var i = 0; i < projectReferences.length; i++) {
                     var oldRef = oldRefs[i];
                     if (oldRef) {
                         var newRef = parseProjectReferenceConfigFile(projectReferences[i]);
                         if (!newRef || newRef.sourceFile !== oldRef.sourceFile) {
-                            // Resolved project reference has gone missing or changed
-                            return oldProgram.structureIsReused = 0 /* Not */;
+                            return oldProgram.structureIsReused = 0;
                         }
                     }
                     else {
-                        // A previously-unresolved reference may be resolved now
                         if (parseProjectReferenceConfigFile(projectReferences[i]) !== undefined) {
-                            return oldProgram.structureIsReused = 0 /* Not */;
+                            return oldProgram.structureIsReused = 0;
                         }
                     }
                 }
             }
             else {
                 if (oldRefs) {
-                    return oldProgram.structureIsReused = 0 /* Not */;
+                    return oldProgram.structureIsReused = 0;
                 }
             }
-            // check if program source files has changed in the way that can affect structure of the program
             var newSourceFiles = [];
             var filePaths = [];
             var modifiedSourceFiles = [];
-            oldProgram.structureIsReused = 2 /* Completely */;
-            // If the missing file paths are now present, it can change the progam structure,
-            // and hence cant reuse the structure.
-            // This is same as how we dont reuse the structure if one of the file from old program is now missing
+            oldProgram.structureIsReused = 2;
             if (oldProgram.getMissingFilePaths().some(function (missingFilePath) { return host.fileExists(missingFilePath); })) {
-                return oldProgram.structureIsReused = 0 /* Not */;
+                return oldProgram.structureIsReused = 0;
             }
             var oldSourceFiles = oldProgram.getSourceFiles();
-            var SeenPackageName;
-            (function (SeenPackageName) {
-                SeenPackageName[SeenPackageName["Exists"] = 0] = "Exists";
-                SeenPackageName[SeenPackageName["Modified"] = 1] = "Modified";
-            })(SeenPackageName || (SeenPackageName = {}));
             var seenPackageNames = ts.createMap();
             for (var _i = 0, oldSourceFiles_2 = oldSourceFiles; _i < oldSourceFiles_2.length; _i++) {
                 var oldSourceFile = oldSourceFiles_2[_i];
                 var newSourceFile = host.getSourceFileByPath
-                    ? host.getSourceFileByPath(oldSourceFile.fileName, oldSourceFile.resolvedPath || oldSourceFile.path, options.target, /*onError*/ undefined, shouldCreateNewSourceFile)
-                    : host.getSourceFile(oldSourceFile.fileName, options.target, /*onError*/ undefined, shouldCreateNewSourceFile); // TODO: GH#18217
+                    ? host.getSourceFileByPath(oldSourceFile.fileName, oldSourceFile.resolvedPath || oldSourceFile.path, options.target, undefined, shouldCreateNewSourceFile)
+                    : host.getSourceFile(oldSourceFile.fileName, options.target, undefined, shouldCreateNewSourceFile);
                 if (!newSourceFile) {
-                    return oldProgram.structureIsReused = 0 /* Not */;
+                    return oldProgram.structureIsReused = 0;
                 }
                 ts.Debug.assert(!newSourceFile.redirectInfo, "Host should not return a redirect source file from `getSourceFile`");
                 var fileChanged = void 0;
                 if (oldSourceFile.redirectInfo) {
-                    // We got `newSourceFile` by path, so it is actually for the unredirected file.
-                    // This lets us know if the unredirected file has changed. If it has we should break the redirect.
                     if (newSourceFile !== oldSourceFile.redirectInfo.unredirected) {
-                        // Underlying file has changed. Might not redirect anymore. Must rebuild program.
-                        return oldProgram.structureIsReused = 0 /* Not */;
+                        return oldProgram.structureIsReused = 0;
                     }
                     fileChanged = false;
-                    newSourceFile = oldSourceFile; // Use the redirect.
+                    newSourceFile = oldSourceFile;
                 }
                 else if (oldProgram.redirectTargetsSet.has(oldSourceFile.path)) {
-                    // If a redirected-to source file changes, the redirect may be broken.
                     if (newSourceFile !== oldSourceFile) {
-                        return oldProgram.structureIsReused = 0 /* Not */;
+                        return oldProgram.structureIsReused = 0;
                     }
                     fileChanged = false;
                 }
@@ -81478,66 +65944,48 @@ var ts;
                 filePaths.push(newSourceFile.path);
                 var packageName = oldProgram.sourceFileToPackageName.get(oldSourceFile.path);
                 if (packageName !== undefined) {
-                    // If there are 2 different source files for the same package name and at least one of them changes,
-                    // they might become redirects. So we must rebuild the program.
                     var prevKind = seenPackageNames.get(packageName);
-                    var newKind = fileChanged ? 1 /* Modified */ : 0 /* Exists */;
-                    if ((prevKind !== undefined && newKind === 1 /* Modified */) || prevKind === 1 /* Modified */) {
-                        return oldProgram.structureIsReused = 0 /* Not */;
+                    var newKind = fileChanged ? 1 : 0;
+                    if ((prevKind !== undefined && newKind === 1) || prevKind === 1) {
+                        return oldProgram.structureIsReused = 0;
                     }
                     seenPackageNames.set(packageName, newKind);
                 }
                 if (fileChanged) {
-                    // The `newSourceFile` object was created for the new program.
                     if (!ts.arrayIsEqualTo(oldSourceFile.libReferenceDirectives, newSourceFile.libReferenceDirectives, fileReferenceIsEqualTo)) {
-                        // 'lib' references has changed. Matches behavior in changesAffectModuleResolution
-                        return oldProgram.structureIsReused = 0 /* Not */;
+                        return oldProgram.structureIsReused = 0;
                     }
                     if (oldSourceFile.hasNoDefaultLib !== newSourceFile.hasNoDefaultLib) {
-                        // value of no-default-lib has changed
-                        // this will affect if default library is injected into the list of files
-                        oldProgram.structureIsReused = 1 /* SafeModules */;
+                        oldProgram.structureIsReused = 1;
                     }
-                    // check tripleslash references
                     if (!ts.arrayIsEqualTo(oldSourceFile.referencedFiles, newSourceFile.referencedFiles, fileReferenceIsEqualTo)) {
-                        // tripleslash references has changed
-                        oldProgram.structureIsReused = 1 /* SafeModules */;
+                        oldProgram.structureIsReused = 1;
                     }
-                    // check imports and module augmentations
                     collectExternalModuleReferences(newSourceFile);
                     if (!ts.arrayIsEqualTo(oldSourceFile.imports, newSourceFile.imports, moduleNameIsEqualTo)) {
-                        // imports has changed
-                        oldProgram.structureIsReused = 1 /* SafeModules */;
+                        oldProgram.structureIsReused = 1;
                     }
                     if (!ts.arrayIsEqualTo(oldSourceFile.moduleAugmentations, newSourceFile.moduleAugmentations, moduleNameIsEqualTo)) {
-                        // moduleAugmentations has changed
-                        oldProgram.structureIsReused = 1 /* SafeModules */;
+                        oldProgram.structureIsReused = 1;
                     }
-                    if ((oldSourceFile.flags & 1572864 /* PermanentlySetIncrementalFlags */) !== (newSourceFile.flags & 1572864 /* PermanentlySetIncrementalFlags */)) {
-                        // dynamicImport has changed
-                        oldProgram.structureIsReused = 1 /* SafeModules */;
+                    if ((oldSourceFile.flags & 1572864) !== (newSourceFile.flags & 1572864)) {
+                        oldProgram.structureIsReused = 1;
                     }
                     if (!ts.arrayIsEqualTo(oldSourceFile.typeReferenceDirectives, newSourceFile.typeReferenceDirectives, fileReferenceIsEqualTo)) {
-                        // 'types' references has changed
-                        oldProgram.structureIsReused = 1 /* SafeModules */;
+                        oldProgram.structureIsReused = 1;
                     }
-                    // tentatively approve the file
                     modifiedSourceFiles.push({ oldFile: oldSourceFile, newFile: newSourceFile });
                 }
                 else if (hasInvalidatedResolution(oldSourceFile.path)) {
-                    // 'module/types' references could have changed
-                    oldProgram.structureIsReused = 1 /* SafeModules */;
-                    // add file to the modified list so that we will resolve it later
+                    oldProgram.structureIsReused = 1;
                     modifiedSourceFiles.push({ oldFile: oldSourceFile, newFile: newSourceFile });
                 }
-                // if file has passed all checks it should be safe to reuse it
                 newSourceFiles.push(newSourceFile);
             }
-            if (oldProgram.structureIsReused !== 2 /* Completely */) {
+            if (oldProgram.structureIsReused !== 2) {
                 return oldProgram.structureIsReused;
             }
             modifiedFilePaths = modifiedSourceFiles.map(function (f) { return f.newFile.path; });
-            // try to verify results of module resolution
             for (var _a = 0, modifiedSourceFiles_1 = modifiedSourceFiles; _a < modifiedSourceFiles_1.length; _a++) {
                 var _b = modifiedSourceFiles_1[_a], oldSourceFile = _b.oldFile, newSourceFile = _b.newFile;
                 var newSourceFilePath = ts.getNormalizedAbsolutePath(newSourceFile.fileName, currentDirectory);
@@ -81545,10 +65993,9 @@ var ts;
                     var moduleNames = getModuleNames(newSourceFile);
                     var oldProgramState = { program: oldProgram, oldSourceFile: oldSourceFile, modifiedFilePaths: modifiedFilePaths };
                     var resolutions = resolveModuleNamesReusingOldState(moduleNames, newSourceFilePath, newSourceFile, oldProgramState);
-                    // ensure that module resolution results are still correct
                     var resolutionsChanged = ts.hasChangesInResolutions(moduleNames, resolutions, oldSourceFile.resolvedModules, ts.moduleResolutionIsEqualTo);
                     if (resolutionsChanged) {
-                        oldProgram.structureIsReused = 1 /* SafeModules */;
+                        oldProgram.structureIsReused = 1;
                         newSourceFile.resolvedModules = ts.zipToMap(moduleNames, resolutions);
                     }
                     else {
@@ -81558,10 +66005,9 @@ var ts;
                 if (resolveTypeReferenceDirectiveNamesWorker) {
                     var typesReferenceDirectives = ts.map(newSourceFile.typeReferenceDirectives, function (x) { return x.fileName; });
                     var resolutions = resolveTypeReferenceDirectiveNamesWorker(typesReferenceDirectives, newSourceFilePath);
-                    // ensure that types resolutions are still correct
                     var resolutionsChanged = ts.hasChangesInResolutions(typesReferenceDirectives, resolutions, oldSourceFile.resolvedTypeReferenceDirectiveNames, ts.typeDirectiveIsEqualTo);
                     if (resolutionsChanged) {
-                        oldProgram.structureIsReused = 1 /* SafeModules */;
+                        oldProgram.structureIsReused = 1;
                         newSourceFile.resolvedTypeReferenceDirectiveNames = ts.zipToMap(typesReferenceDirectives, resolutions);
                     }
                     else {
@@ -81569,17 +66015,15 @@ var ts;
                     }
                 }
             }
-            if (oldProgram.structureIsReused !== 2 /* Completely */) {
+            if (oldProgram.structureIsReused !== 2) {
                 return oldProgram.structureIsReused;
             }
             if (host.hasChangedAutomaticTypeDirectiveNames) {
-                return oldProgram.structureIsReused = 1 /* SafeModules */;
+                return oldProgram.structureIsReused = 1;
             }
             missingFilePaths = oldProgram.getMissingFilePaths();
-            // update fileName -> file mapping
             for (var i = 0; i < newSourceFiles.length; i++) {
                 filesByName.set(filePaths[i], newSourceFiles[i]);
-                // Set the file as found during node modules search if it was found that way in old progra,
                 if (oldProgram.isSourceFileFromExternalLibrary(oldProgram.getSourceFileByPath(filePaths[i]))) {
                     sourceFilesFoundSearchingNodeModules.set(filePaths[i], true);
                 }
@@ -81593,7 +66037,7 @@ var ts;
             resolvedTypeReferenceDirectives = oldProgram.getResolvedTypeReferenceDirectives();
             sourceFileToPackageName = oldProgram.sourceFileToPackageName;
             redirectTargetsSet = oldProgram.redirectTargetsSet;
-            return oldProgram.structureIsReused = 2 /* Completely */;
+            return oldProgram.structureIsReused = 2;
         }
         function getEmitHost(writeFileCallback) {
             return __assign({ getPrependNodes: getPrependNodes,
@@ -81613,12 +66057,11 @@ var ts;
                 var ref = projectReferences[i];
                 var resolvedRefOpts = resolvedProjectReferences[i].commandLine;
                 if (ref.prepend && resolvedRefOpts && resolvedRefOpts.options) {
-                    // Upstream project didn't have outFile set -- skip (error will have been issued earlier)
                     if (!resolvedRefOpts.options.outFile)
                         continue;
                     var dtsFilename = ts.changeExtension(resolvedRefOpts.options.outFile, ".d.ts");
                     var js = host.readFile(resolvedRefOpts.options.outFile) || "/* Input file " + resolvedRefOpts.options.outFile + " was missing */\r\n";
-                    var jsMap = host.readFile(resolvedRefOpts.options.outFile + ".map"); // TODO: try to read sourceMappingUrl comment from the js file
+                    var jsMap = host.readFile(resolvedRefOpts.options.outFile + ".map");
                     var dts = host.readFile(dtsFilename) || "/* Input file " + dtsFilename + " was missing */\r\n";
                     var dtsMap = host.readFile(dtsFilename + ".map");
                     var node = ts.createInputFiles(js, dts, jsMap, dtsMap);
@@ -81637,8 +66080,6 @@ var ts;
             if (!options.noLib) {
                 return false;
             }
-            // If '--lib' is not specified, include default library file according to '--target'
-            // otherwise, using options specified in '--lib' instead of '--target' default library file
             var equalityComparer = host.useCaseSensitiveFileNames() ? ts.equateStringsCaseSensitive : ts.equateStringsCaseInsensitive;
             if (!options.lib) {
                 return equalityComparer(file.fileName, getDefaultLibraryFileName());
@@ -81648,13 +66089,13 @@ var ts;
             }
         }
         function getDiagnosticsProducingTypeChecker() {
-            return diagnosticsProducingTypeChecker || (diagnosticsProducingTypeChecker = ts.createTypeChecker(program, /*produceDiagnostics:*/ true));
+            return diagnosticsProducingTypeChecker || (diagnosticsProducingTypeChecker = ts.createTypeChecker(program, true));
         }
         function dropDiagnosticsProducingTypeChecker() {
             diagnosticsProducingTypeChecker = undefined;
         }
         function getTypeChecker() {
-            return noDiagnosticsTypeChecker || (noDiagnosticsTypeChecker = ts.createTypeChecker(program, /*produceDiagnostics:*/ false));
+            return noDiagnosticsTypeChecker || (noDiagnosticsTypeChecker = ts.createTypeChecker(program, false));
         }
         function emit(sourceFile, writeFileCallback, cancellationToken, emitOnlyDtsFiles, transformers) {
             return runWithCancellationToken(function () { return emitWorker(program, sourceFile, writeFileCallback, cancellationToken, emitOnlyDtsFiles, transformers); });
@@ -81668,13 +66109,10 @@ var ts;
                 if (options.noEmit) {
                     return { diagnostics: declarationDiagnostics, sourceMaps: undefined, emittedFiles: undefined, emitSkipped: true };
                 }
-                // If the noEmitOnError flag is set, then check if we have any errors so far.  If so,
-                // immediately bail out.  Note that we pass 'undefined' for 'sourceFile' so that we
-                // get any preEmit diagnostics, not just the ones
                 if (options.noEmitOnError) {
                     var diagnostics = program.getOptionsDiagnostics(cancellationToken).concat(program.getSyntacticDiagnostics(sourceFile, cancellationToken), program.getGlobalDiagnostics(cancellationToken), program.getSemanticDiagnostics(sourceFile, cancellationToken));
                     if (diagnostics.length === 0 && program.getCompilerOptions().declaration) {
-                        declarationDiagnostics = program.getDeclarationDiagnostics(/*sourceFile*/ undefined, cancellationToken);
+                        declarationDiagnostics = program.getDeclarationDiagnostics(undefined, cancellationToken);
                     }
                     if (diagnostics.length > 0 || declarationDiagnostics.length > 0) {
                         return {
@@ -81686,19 +66124,10 @@ var ts;
                     }
                 }
             }
-            // Create the emit resolver outside of the "emitTime" tracking code below.  That way
-            // any cost associated with it (like type checking) are appropriate associated with
-            // the type-checking counter.
-            //
-            // If the -out option is specified, we should not pass the source file to getEmitResolver.
-            // This is because in the -out scenario all files need to be emitted, and therefore all
-            // files need to be type checked. And the way to specify that all files need to be type
-            // checked is to not pass the file to getEmitResolver.
             var emitResolver = getDiagnosticsProducingTypeChecker().getEmitResolver((options.outFile || options.out) ? undefined : sourceFile, cancellationToken);
             ts.performance.mark("beforeEmit");
             var transformers = emitOnlyDtsFiles ? [] : ts.getTransformers(options, customTransformers);
-            var emitResult = ts.emitFiles(emitResolver, getEmitHost(writeFileCallback), sourceFile, // TODO: GH#18217
-            emitOnlyDtsFiles, transformers, customTransformers && customTransformers.afterDeclarations);
+            var emitResult = ts.emitFiles(emitResolver, getEmitHost(writeFileCallback), sourceFile, emitOnlyDtsFiles, transformers, customTransformers && customTransformers.afterDeclarations);
             ts.performance.mark("afterEmit");
             ts.performance.measure("Emit", "beforeEmit", "afterEmit");
             return emitResult;
@@ -81728,7 +66157,6 @@ var ts;
         }
         function getDeclarationDiagnostics(sourceFile, cancellationToken) {
             var options = program.getCompilerOptions();
-            // collect diagnostics from the program only once if either no source file was specified or out/outFile is set (bundled emit)
             if (!sourceFile || options.out || options.outFile) {
                 return getDeclarationDiagnosticsWorker(sourceFile, cancellationToken);
             }
@@ -81737,8 +66165,6 @@ var ts;
             }
         }
         function getSyntacticDiagnosticsForFile(sourceFile) {
-            // For JavaScript files, we report semantic errors for using TypeScript-only
-            // constructs from within a JavaScript file as syntactic errors.
             if (ts.isSourceFileJavaScript(sourceFile)) {
                 if (!sourceFile.additionalSyntacticDiagnostics) {
                     sourceFile.additionalSyntacticDiagnostics = getJavaScriptSyntacticDiagnosticsForFile(sourceFile);
@@ -81753,15 +66179,6 @@ var ts;
             }
             catch (e) {
                 if (e instanceof ts.OperationCanceledException) {
-                    // We were canceled while performing the operation.  Because our type checker
-                    // might be a bad state, we need to throw it away.
-                    //
-                    // Note: we are overly aggressive here.  We do not actually *have* to throw away
-                    // the "noDiagnosticsTypeChecker".  However, for simplicity, i'd like to keep
-                    // the lifetimes of these two TypeCheckers the same.  Also, we generally only
-                    // cancel when the user has made a change anyways.  And, in that case, we (the
-                    // program instance) will get thrown away anyways.  So trying to keep one of
-                    // these type checkers alive doesn't serve much purpose.
                     noDiagnosticsTypeChecker = undefined;
                     diagnosticsProducingTypeChecker = undefined;
                 }
@@ -81773,18 +66190,14 @@ var ts;
         }
         function getSemanticDiagnosticsForFileNoCache(sourceFile, cancellationToken) {
             return runWithCancellationToken(function () {
-                // If skipLibCheck is enabled, skip reporting errors if file is a declaration file.
-                // If skipDefaultLibCheck is enabled, skip reporting errors if file contains a
-                // '/// <reference no-default-lib="true"/>' directive.
                 if (options.skipLibCheck && sourceFile.isDeclarationFile || options.skipDefaultLibCheck && sourceFile.hasNoDefaultLib) {
                     return ts.emptyArray;
                 }
                 var typeChecker = getDiagnosticsProducingTypeChecker();
                 ts.Debug.assert(!!sourceFile.bindDiagnostics);
                 var isCheckJs = ts.isCheckJsEnabledForFile(sourceFile, options);
-                // By default, only type-check .ts, .tsx, 'Deferred' and 'External' files (external files are added by plugins)
-                var includeBindAndCheckDiagnostics = sourceFile.scriptKind === 3 /* TS */ || sourceFile.scriptKind === 4 /* TSX */ ||
-                    sourceFile.scriptKind === 5 /* External */ || isCheckJs || sourceFile.scriptKind === 7 /* Deferred */;
+                var includeBindAndCheckDiagnostics = sourceFile.scriptKind === 3 || sourceFile.scriptKind === 4 ||
+                    sourceFile.scriptKind === 5 || isCheckJs || sourceFile.scriptKind === 7;
                 var bindDiagnostics = includeBindAndCheckDiagnostics ? sourceFile.bindDiagnostics : ts.emptyArray;
                 var checkDiagnostics = includeBindAndCheckDiagnostics ? typeChecker.getDiagnostics(sourceFile, cancellationToken) : ts.emptyArray;
                 var fileProcessingDiagnosticsInFile = fileProcessingDiagnostics.getDiagnostics(sourceFile.fileName);
@@ -81809,23 +66222,18 @@ var ts;
                 return getDiagnosticsProducingTypeChecker().getSuggestionDiagnostics(sourceFile, cancellationToken);
             });
         }
-        /**
-         * Skip errors if previous line start with '// @ts-ignore' comment, not counting non-empty non-comment lines
-         */
         function shouldReportDiagnostic(diagnostic) {
             var file = diagnostic.file, start = diagnostic.start;
             if (file) {
                 var lineStarts = ts.getLineStarts(file);
-                var line = ts.computeLineAndCharacterOfPosition(lineStarts, start).line; // TODO: GH#18217
+                var line = ts.computeLineAndCharacterOfPosition(lineStarts, start).line;
                 while (line > 0) {
                     var previousLineText = file.text.slice(lineStarts[line - 1], lineStarts[line]);
                     var result = ignoreDiagnosticCommentRegEx.exec(previousLineText);
                     if (!result) {
-                        // non-empty line
                         return true;
                     }
                     if (result[3]) {
-                        // @ts-ignore
                         return false;
                     }
                     line--;
@@ -81840,68 +66248,64 @@ var ts;
                 walk(sourceFile);
                 return diagnostics;
                 function walk(node) {
-                    // Return directly from the case if the given node doesnt want to visit each child
-                    // Otherwise break to visit each child
                     switch (parent.kind) {
-                        case 149 /* Parameter */:
-                        case 152 /* PropertyDeclaration */:
+                        case 149:
+                        case 152:
                             if (parent.questionToken === node) {
                                 diagnostics.push(createDiagnosticForNode(node, ts.Diagnostics._0_can_only_be_used_in_a_ts_file, "?"));
                                 return;
                             }
-                        // falls through
-                        case 154 /* MethodDeclaration */:
-                        case 153 /* MethodSignature */:
-                        case 155 /* Constructor */:
-                        case 156 /* GetAccessor */:
-                        case 157 /* SetAccessor */:
-                        case 192 /* FunctionExpression */:
-                        case 234 /* FunctionDeclaration */:
-                        case 193 /* ArrowFunction */:
-                        case 232 /* VariableDeclaration */:
-                            // type annotation
+                        case 154:
+                        case 153:
+                        case 155:
+                        case 156:
+                        case 157:
+                        case 192:
+                        case 234:
+                        case 193:
+                        case 232:
                             if (parent.type === node) {
                                 diagnostics.push(createDiagnosticForNode(node, ts.Diagnostics.types_can_only_be_used_in_a_ts_file));
                                 return;
                             }
                     }
                     switch (node.kind) {
-                        case 243 /* ImportEqualsDeclaration */:
+                        case 243:
                             diagnostics.push(createDiagnosticForNode(node, ts.Diagnostics.import_can_only_be_used_in_a_ts_file));
                             return;
-                        case 249 /* ExportAssignment */:
+                        case 249:
                             if (node.isExportEquals) {
                                 diagnostics.push(createDiagnosticForNode(node, ts.Diagnostics.export_can_only_be_used_in_a_ts_file));
                                 return;
                             }
                             break;
-                        case 268 /* HeritageClause */:
+                        case 268:
                             var heritageClause = node;
-                            if (heritageClause.token === 108 /* ImplementsKeyword */) {
+                            if (heritageClause.token === 108) {
                                 diagnostics.push(createDiagnosticForNode(node, ts.Diagnostics.implements_clauses_can_only_be_used_in_a_ts_file));
                                 return;
                             }
                             break;
-                        case 236 /* InterfaceDeclaration */:
+                        case 236:
                             diagnostics.push(createDiagnosticForNode(node, ts.Diagnostics.interface_declarations_can_only_be_used_in_a_ts_file));
                             return;
-                        case 239 /* ModuleDeclaration */:
+                        case 239:
                             diagnostics.push(createDiagnosticForNode(node, ts.Diagnostics.module_declarations_can_only_be_used_in_a_ts_file));
                             return;
-                        case 237 /* TypeAliasDeclaration */:
+                        case 237:
                             diagnostics.push(createDiagnosticForNode(node, ts.Diagnostics.type_aliases_can_only_be_used_in_a_ts_file));
                             return;
-                        case 238 /* EnumDeclaration */:
+                        case 238:
                             diagnostics.push(createDiagnosticForNode(node, ts.Diagnostics.enum_declarations_can_only_be_used_in_a_ts_file));
                             return;
-                        case 209 /* NonNullExpression */:
+                        case 209:
                             diagnostics.push(createDiagnosticForNode(node, ts.Diagnostics.non_null_assertions_can_only_be_used_in_a_ts_file));
                             return;
-                        case 208 /* AsExpression */:
+                        case 208:
                             diagnostics.push(createDiagnosticForNode(node.type, ts.Diagnostics.type_assertion_expressions_can_only_be_used_in_a_ts_file));
                             return;
-                        case 190 /* TypeAssertionExpression */:
-                            ts.Debug.fail(); // Won't parse these in a JS file anyway, as they are interpreted as JSX.
+                        case 190:
+                            ts.Debug.fail();
                     }
                     var prevParent = parent;
                     parent = node;
@@ -81913,60 +66317,54 @@ var ts;
                         diagnostics.push(createDiagnosticForNode(parent, ts.Diagnostics.Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning));
                     }
                     switch (parent.kind) {
-                        case 235 /* ClassDeclaration */:
-                        case 154 /* MethodDeclaration */:
-                        case 153 /* MethodSignature */:
-                        case 155 /* Constructor */:
-                        case 156 /* GetAccessor */:
-                        case 157 /* SetAccessor */:
-                        case 192 /* FunctionExpression */:
-                        case 234 /* FunctionDeclaration */:
-                        case 193 /* ArrowFunction */:
-                            // Check type parameters
+                        case 235:
+                        case 154:
+                        case 153:
+                        case 155:
+                        case 156:
+                        case 157:
+                        case 192:
+                        case 234:
+                        case 193:
                             if (nodes === parent.typeParameters) {
                                 diagnostics.push(createDiagnosticForNodeArray(nodes, ts.Diagnostics.type_parameter_declarations_can_only_be_used_in_a_ts_file));
                                 return;
                             }
-                        // falls through
-                        case 214 /* VariableStatement */:
-                            // Check modifiers
+                        case 214:
                             if (nodes === parent.modifiers) {
-                                return checkModifiers(nodes, parent.kind === 214 /* VariableStatement */);
+                                return checkModifiers(nodes, parent.kind === 214);
                             }
                             break;
-                        case 152 /* PropertyDeclaration */:
-                            // Check modifiers of property declaration
+                        case 152:
                             if (nodes === parent.modifiers) {
                                 for (var _i = 0, _a = nodes; _i < _a.length; _i++) {
                                     var modifier = _a[_i];
-                                    if (modifier.kind !== 115 /* StaticKeyword */) {
+                                    if (modifier.kind !== 115) {
                                         diagnostics.push(createDiagnosticForNode(modifier, ts.Diagnostics._0_can_only_be_used_in_a_ts_file, ts.tokenToString(modifier.kind)));
                                     }
                                 }
                                 return;
                             }
                             break;
-                        case 149 /* Parameter */:
-                            // Check modifiers of parameter declaration
+                        case 149:
                             if (nodes === parent.modifiers) {
                                 diagnostics.push(createDiagnosticForNodeArray(nodes, ts.Diagnostics.parameter_modifiers_can_only_be_used_in_a_ts_file));
                                 return;
                             }
                             break;
-                        case 187 /* CallExpression */:
-                        case 188 /* NewExpression */:
-                        case 207 /* ExpressionWithTypeArguments */:
-                        case 256 /* JsxSelfClosingElement */:
-                        case 257 /* JsxOpeningElement */:
-                            // Check type arguments
+                        case 187:
+                        case 188:
+                        case 207:
+                        case 256:
+                        case 257:
                             if (nodes === parent.typeArguments) {
                                 diagnostics.push(createDiagnosticForNodeArray(nodes, ts.Diagnostics.type_arguments_can_only_be_used_in_a_ts_file));
                                 return;
                             }
                             break;
                     }
-                    for (var _b = 0, nodes_5 = nodes; _b < nodes_5.length; _b++) {
-                        var node = nodes_5[_b];
+                    for (var _b = 0, nodes_6 = nodes; _b < nodes_6.length; _b++) {
+                        var node = nodes_6[_b];
                         walk(node);
                     }
                 }
@@ -81974,24 +66372,21 @@ var ts;
                     for (var _i = 0, modifiers_1 = modifiers; _i < modifiers_1.length; _i++) {
                         var modifier = modifiers_1[_i];
                         switch (modifier.kind) {
-                            case 76 /* ConstKeyword */:
+                            case 76:
                                 if (isConstValid) {
                                     continue;
                                 }
-                            // to report error,
-                            // falls through
-                            case 114 /* PublicKeyword */:
-                            case 112 /* PrivateKeyword */:
-                            case 113 /* ProtectedKeyword */:
-                            case 132 /* ReadonlyKeyword */:
-                            case 124 /* DeclareKeyword */:
-                            case 117 /* AbstractKeyword */:
+                            case 114:
+                            case 112:
+                            case 113:
+                            case 132:
+                            case 124:
+                            case 117:
                                 diagnostics.push(createDiagnosticForNode(modifier, ts.Diagnostics._0_can_only_be_used_in_a_ts_file, ts.tokenToString(modifier.kind)));
                                 break;
-                            // These are all legal modifiers.
-                            case 115 /* StaticKeyword */:
-                            case 84 /* ExportKeyword */:
-                            case 79 /* DefaultKeyword */:
+                            case 115:
+                            case 84:
+                            case 79:
                         }
                     }
                 }
@@ -81999,8 +66394,6 @@ var ts;
                     var start = nodes.pos;
                     return ts.createFileDiagnostic(sourceFile, start, nodes.end - start, message, arg0, arg1, arg2);
                 }
-                // Since these are syntactic diagnostics, parent might not have been set
-                // this means the sourceFile cannot be infered from the node
                 function createDiagnosticForNode(node, message, arg0, arg1, arg2) {
                     return ts.createDiagnosticForNodeInSourceFile(sourceFile, node, message, arg0, arg1, arg2);
                 }
@@ -82012,7 +66405,6 @@ var ts;
         function getDeclarationDiagnosticsForFileNoCache(sourceFile, cancellationToken) {
             return runWithCancellationToken(function () {
                 var resolver = getDiagnosticsProducingTypeChecker().getEmitResolver(sourceFile, cancellationToken);
-                // Don't actually write any files since we're just getting diagnostics.
                 return ts.getDeclarationDiagnostics(getEmitHost(ts.noop), resolver, sourceFile);
             });
         }
@@ -82023,7 +66415,7 @@ var ts;
             if (cachedResult) {
                 return cachedResult;
             }
-            var result = getDiagnostics(sourceFile, cancellationToken) || ts.emptyArray; // TODO: GH#18217
+            var result = getDiagnostics(sourceFile, cancellationToken) || ts.emptyArray;
             if (sourceFile) {
                 if (!cache.perFile) {
                     cache.perFile = ts.createMap();
@@ -82048,15 +66440,15 @@ var ts;
             return configFileParsingDiagnostics || ts.emptyArray;
         }
         function processRootFile(fileName, isDefaultLib, ignoreNoDefaultLib) {
-            processSourceFile(ts.normalizePath(fileName), isDefaultLib, ignoreNoDefaultLib, /*packageId*/ undefined);
+            processSourceFile(ts.normalizePath(fileName), isDefaultLib, ignoreNoDefaultLib, undefined);
         }
         function fileReferenceIsEqualTo(a, b) {
             return a.fileName === b.fileName;
         }
         function moduleNameIsEqualTo(a, b) {
-            return a.kind === 71 /* Identifier */
-                ? b.kind === 71 /* Identifier */ && a.escapedText === b.escapedText
-                : b.kind === 9 /* StringLiteral */ && a.text === b.text;
+            return a.kind === 71
+                ? b.kind === 71 && a.escapedText === b.escapedText
+                : b.kind === 9 && a.text === b.text;
         }
         function collectExternalModuleReferences(file) {
             if (file.imports) {
@@ -82064,31 +66456,27 @@ var ts;
             }
             var isJavaScriptFile = ts.isSourceFileJavaScript(file);
             var isExternalModuleFile = ts.isExternalModule(file);
-            // file.imports may not be undefined if there exists dynamic import
             var imports;
             var moduleAugmentations;
             var ambientModules;
-            // If we are importing helpers, we need to add a synthetic reference to resolve the
-            // helpers library.
             if (options.importHelpers
                 && (options.isolatedModules || isExternalModuleFile)
                 && !file.isDeclarationFile) {
-                // synthesize 'import "tslib"' declaration
                 var externalHelpersModuleReference = ts.createLiteral(ts.externalHelpersModuleNameText);
-                var importDecl = ts.createImportDeclaration(/*decorators*/ undefined, /*modifiers*/ undefined, /*importClause*/ undefined, externalHelpersModuleReference);
-                ts.addEmitFlags(importDecl, 67108864 /* NeverApplyImportHelper */);
+                var importDecl = ts.createImportDeclaration(undefined, undefined, undefined, externalHelpersModuleReference);
+                ts.addEmitFlags(importDecl, 67108864);
                 externalHelpersModuleReference.parent = importDecl;
                 importDecl.parent = file;
                 imports = [externalHelpersModuleReference];
             }
             for (var _i = 0, _a = file.statements; _i < _a.length; _i++) {
                 var node = _a[_i];
-                collectModuleReferences(node, /*inAmbientModule*/ false);
-                if ((file.flags & 524288 /* PossiblyContainsDynamicImport */) || isJavaScriptFile) {
+                collectModuleReferences(node, false);
+                if ((file.flags & 524288) || isJavaScriptFile) {
                     collectDynamicImportOrRequireCalls(node);
                 }
             }
-            if ((file.flags & 524288 /* PossiblyContainsDynamicImport */) || isJavaScriptFile) {
+            if ((file.flags & 524288) || isJavaScriptFile) {
                 collectDynamicImportOrRequireCalls(file.endOfFileToken);
             }
             file.imports = imports || ts.emptyArray;
@@ -82098,39 +66486,25 @@ var ts;
             function collectModuleReferences(node, inAmbientModule) {
                 if (ts.isAnyImportOrReExport(node)) {
                     var moduleNameExpr = ts.getExternalModuleName(node);
-                    // TypeScript 1.0 spec (April 2014): 12.1.6
-                    // An ExternalImportDeclaration in an AmbientExternalModuleDeclaration may reference other external modules
-                    // only through top - level external module names. Relative external module names are not permitted.
                     if (moduleNameExpr && ts.isStringLiteral(moduleNameExpr) && moduleNameExpr.text && (!inAmbientModule || !ts.isExternalModuleNameRelative(moduleNameExpr.text))) {
                         imports = ts.append(imports, moduleNameExpr);
                     }
                 }
                 else if (ts.isModuleDeclaration(node)) {
-                    if (ts.isAmbientModule(node) && (inAmbientModule || ts.hasModifier(node, 2 /* Ambient */) || file.isDeclarationFile)) {
+                    if (ts.isAmbientModule(node) && (inAmbientModule || ts.hasModifier(node, 2) || file.isDeclarationFile)) {
                         var nameText = ts.getTextOfIdentifierOrLiteral(node.name);
-                        // Ambient module declarations can be interpreted as augmentations for some existing external modules.
-                        // This will happen in two cases:
-                        // - if current file is external module then module augmentation is a ambient module declaration defined in the top level scope
-                        // - if current file is not external module then module augmentation is an ambient module declaration with non-relative module name
-                        //   immediately nested in top level ambient module declaration .
                         if (isExternalModuleFile || (inAmbientModule && !ts.isExternalModuleNameRelative(nameText))) {
                             (moduleAugmentations || (moduleAugmentations = [])).push(node.name);
                         }
                         else if (!inAmbientModule) {
                             if (file.isDeclarationFile) {
-                                // for global .d.ts files record name of ambient module
                                 (ambientModules || (ambientModules = [])).push(nameText);
                             }
-                            // An AmbientExternalModuleDeclaration declares an external module.
-                            // This type of declaration is permitted only in the global module.
-                            // The StringLiteral must specify a top - level external module name.
-                            // Relative external module names are not permitted
-                            // NOTE: body of ambient module is always a module block, if it exists
                             var body = node.body;
                             if (body) {
                                 for (var _i = 0, _a = body.statements; _i < _a.length; _i++) {
                                     var statement = _a[_i];
-                                    collectModuleReferences(statement, /*inAmbientModule*/ true);
+                                    collectModuleReferences(statement, true);
                                 }
                             }
                         }
@@ -82138,10 +66512,9 @@ var ts;
                 }
             }
             function collectDynamicImportOrRequireCalls(node) {
-                if (ts.isRequireCall(node, /*checkArgumentIsStringLiteralLike*/ true)) {
+                if (ts.isRequireCall(node, true)) {
                     imports = ts.append(imports, node.arguments[0]);
                 }
-                // we have to check the argument list has length of 1. We will still have to process these even though we have parsing error.
                 else if (ts.isImportCall(node) && node.arguments.length === 1 && ts.isStringLiteralLike(node.arguments[0])) {
                     imports = ts.append(imports, node.arguments[0]);
                 }
@@ -82164,7 +66537,6 @@ var ts;
                 return getSourceFile(ts.combinePaths(defaultLibraryPath, libFileName));
             }
         }
-        /** This should have similar behavior to 'processSourceFile' without diagnostics or mutation. */
         function getSourceFileFromReference(referencingFile, ref) {
             return getSourceFileFromReferenceWorker(resolveTripleslashReference(ref.fileName, referencingFile.fileName), function (fileName) { return filesByName.get(toPath(fileName)); });
         }
@@ -82202,14 +66574,12 @@ var ts;
                 }
                 var sourceFileWithAddedExtension = ts.forEach(supportedExtensions, function (extension) { return getSourceFile(fileName + extension); });
                 if (fail && !sourceFileWithAddedExtension)
-                    fail(ts.Diagnostics.File_0_not_found, fileName + ".ts" /* Ts */);
+                    fail(ts.Diagnostics.File_0_not_found, fileName + ".ts");
                 return sourceFileWithAddedExtension;
             }
         }
-        /** This has side effects through `findSourceFile`. */
         function processSourceFile(fileName, isDefaultLib, ignoreNoDefaultLib, packageId, refFile, refPos, refEnd) {
-            getSourceFileFromReferenceWorker(fileName, function (fileName) { return findSourceFile(fileName, toPath(fileName), isDefaultLib, ignoreNoDefaultLib, refFile, refPos, refEnd, packageId); }, // TODO: GH#18217
-            function (diagnostic) {
+            getSourceFileFromReferenceWorker(fileName, function (fileName) { return findSourceFile(fileName, toPath(fileName), isDefaultLib, ignoreNoDefaultLib, refFile, refPos, refEnd, packageId); }, function (diagnostic) {
                 var args = [];
                 for (var _i = 1; _i < arguments.length; _i++) {
                     args[_i - 1] = arguments[_i];
@@ -82243,17 +66613,12 @@ var ts;
             });
             return redirect;
         }
-        // Get source file from normalized fileName
         function findSourceFile(fileName, path, isDefaultLib, ignoreNoDefaultLib, refFile, refPos, refEnd, packageId) {
             if (filesByName.has(path)) {
                 var file_1 = filesByName.get(path);
-                // try to check if we've already seen this file but with a different casing in path
-                // NOTE: this only makes sense for case-insensitive file systems
                 if (file_1 && options.forceConsistentCasingInFileNames && ts.getNormalizedAbsolutePath(file_1.fileName, currentDirectory) !== ts.getNormalizedAbsolutePath(fileName, currentDirectory)) {
                     reportFileNamesDifferOnlyInCasingError(fileName, file_1.fileName, refFile, refPos, refEnd);
                 }
-                // If the file was previously found via a node_modules search, but is now being processed as a root file,
-                // then everything it sucks in may also be marked incorrectly, and needs to be checked again.
                 if (file_1 && sourceFilesFoundSearchingNodeModules.get(file_1.path) && currentNodeModulesDepth === 0) {
                     sourceFilesFoundSearchingNodeModules.set(file_1.path, false);
                     if (!options.noResolve) {
@@ -82264,7 +66629,6 @@ var ts;
                     modulesWithElidedImports.set(file_1.path, false);
                     processImportedModules(file_1);
                 }
-                // See if we need to reprocess the imports due to prior skipped imports
                 else if (file_1 && modulesWithElidedImports.get(file_1.path)) {
                     if (currentNodeModulesDepth < maxNodeModuleJsDepth) {
                         modulesWithElidedImports.set(file_1.path, false);
@@ -82279,15 +66643,9 @@ var ts;
                 if (redirect) {
                     (refFile.redirectedReferences || (refFile.redirectedReferences = [])).push(fileName);
                     fileName = redirect;
-                    // Once we start redirecting to a file, we can potentially come back to it
-                    // via a back-reference from another file in the .d.ts folder. If that happens we'll
-                    // end up trying to add it to the program *again* because we were tracking it via its
-                    // original (un-redirected) name. So we have to map both the original path and the redirected path
-                    // to the source file we're about to find/create
                     redirectedPath = toPath(redirect);
                 }
             }
-            // We haven't looked for this file, do so now and cache result
             var file = host.getSourceFile(fileName, options.target, function (hostErrorMessage) {
                 if (refFile !== undefined && refPos !== undefined && refEnd !== undefined) {
                     fileProcessingDiagnostics.add(ts.createFileDiagnostic(refFile, refPos, refEnd - refPos, ts.Diagnostics.Cannot_read_file_0_Colon_1, fileName, hostErrorMessage));
@@ -82300,9 +66658,7 @@ var ts;
                 var packageIdKey = ts.packageIdToString(packageId);
                 var fileFromPackageId = packageIdToSourceFile.get(packageIdKey);
                 if (fileFromPackageId) {
-                    // Some other SourceFile already exists with this package name and version.
-                    // Instead of creating a duplicate, just redirect to the existing one.
-                    var dupFile = createRedirectSourceFile(fileFromPackageId, file, fileName, path); // TODO: GH#18217
+                    var dupFile = createRedirectSourceFile(fileFromPackageId, file, fileName, path);
                     redirectTargetsSet.set(fileFromPackageId.path, true);
                     filesByName.set(path, dupFile);
                     sourceFileToPackageName.set(path, packageId.name);
@@ -82310,7 +66666,6 @@ var ts;
                     return dupFile;
                 }
                 else if (file) {
-                    // This is the first source file to have this packageId.
                     packageIdToSourceFile.set(packageIdKey, file);
                     sourceFileToPackageName.set(path, packageId.name);
                 }
@@ -82325,7 +66680,6 @@ var ts;
                 file.resolvedPath = toPath(fileName);
                 if (host.useCaseSensitiveFileNames()) {
                     var pathLowerCase = path.toLowerCase();
-                    // for case-sensitive file systems check if we've already seen some file with similar filename ignoring case
                     var existingFile = filesByNameIgnoreCase.get(pathLowerCase);
                     if (existingFile) {
                         reportFileNamesDifferOnlyInCasingError(fileName, existingFile.fileName, refFile, refPos, refEnd);
@@ -82340,7 +66694,6 @@ var ts;
                     processTypeReferenceDirectives(file);
                 }
                 processLibReferenceDirectives(file);
-                // always process imported modules to record module name resolutions
                 processImportedModules(file);
                 if (isDefaultLib) {
                     processingDefaultLibFiles.push(file);
@@ -82353,8 +66706,6 @@ var ts;
         }
         function getProjectReferenceRedirect(fileName) {
             var path = toPath(fileName);
-            // If this file is produced by a referenced project, we need to rewrite it to
-            // look in the output folder of the referenced project rather than the input
             var normalized = ts.getNormalizedAbsolutePath(fileName, path);
             var result;
             projectReferenceRedirects.forEach(function (v, k) {
@@ -82370,11 +66721,10 @@ var ts;
         function processReferencedFiles(file, isDefaultLib) {
             ts.forEach(file.referencedFiles, function (ref) {
                 var referencedFileName = resolveTripleslashReference(ref.fileName, file.fileName);
-                processSourceFile(referencedFileName, isDefaultLib, /*ignoreNoDefaultLib*/ false, /*packageId*/ undefined, file, ref.pos, ref.end);
+                processSourceFile(referencedFileName, isDefaultLib, false, undefined, file, ref.pos, ref.end);
             });
         }
         function processTypeReferenceDirectives(file) {
-            // We lower-case all type references because npm automatically lowercases all packages. See GH#9824.
             var typeDirectives = ts.map(file.typeReferenceDirectives, function (ref) { return ref.fileName.toLocaleLowerCase(); });
             if (!typeDirectives) {
                 return;
@@ -82383,14 +66733,12 @@ var ts;
             for (var i = 0; i < typeDirectives.length; i++) {
                 var ref = file.typeReferenceDirectives[i];
                 var resolvedTypeReferenceDirective = resolutions[i];
-                // store resolved type directive on the file
                 var fileName = ref.fileName.toLocaleLowerCase();
                 ts.setResolvedTypeReferenceDirective(file, fileName, resolvedTypeReferenceDirective);
                 processTypeReferenceDirective(fileName, resolvedTypeReferenceDirective, file, ref.pos, ref.end);
             }
         }
         function processTypeReferenceDirective(typeReferenceDirective, resolvedTypeReferenceDirective, refFile, refPos, refEnd) {
-            // If we already found this library as a primary reference - nothing to do
             var previousResolution = resolvedTypeReferenceDirectives.get(typeReferenceDirective);
             if (previousResolution && previousResolution.primary) {
                 return;
@@ -82398,32 +66746,25 @@ var ts;
             var saveResolution = true;
             if (resolvedTypeReferenceDirective) {
                 if (resolvedTypeReferenceDirective.primary) {
-                    // resolved from the primary path
-                    processSourceFile(resolvedTypeReferenceDirective.resolvedFileName, /*isDefaultLib*/ false, /*ignoreNoDefaultLib*/ false, resolvedTypeReferenceDirective.packageId, refFile, refPos, refEnd); // TODO: GH#18217
+                    processSourceFile(resolvedTypeReferenceDirective.resolvedFileName, false, false, resolvedTypeReferenceDirective.packageId, refFile, refPos, refEnd);
                 }
                 else {
-                    // If we already resolved to this file, it must have been a secondary reference. Check file contents
-                    // for sameness and possibly issue an error
                     if (previousResolution) {
-                        // Don't bother reading the file again if it's the same file.
                         if (resolvedTypeReferenceDirective.resolvedFileName !== previousResolution.resolvedFileName) {
                             var otherFileText = host.readFile(resolvedTypeReferenceDirective.resolvedFileName);
                             if (otherFileText !== getSourceFile(previousResolution.resolvedFileName).text) {
-                                fileProcessingDiagnostics.add(createDiagnostic(refFile, refPos, refEnd, // TODO: GH#18217
-                                ts.Diagnostics.Conflicting_definitions_for_0_found_at_1_and_2_Consider_installing_a_specific_version_of_this_library_to_resolve_the_conflict, typeReferenceDirective, resolvedTypeReferenceDirective.resolvedFileName, previousResolution.resolvedFileName));
+                                fileProcessingDiagnostics.add(createDiagnostic(refFile, refPos, refEnd, ts.Diagnostics.Conflicting_definitions_for_0_found_at_1_and_2_Consider_installing_a_specific_version_of_this_library_to_resolve_the_conflict, typeReferenceDirective, resolvedTypeReferenceDirective.resolvedFileName, previousResolution.resolvedFileName));
                             }
                         }
-                        // don't overwrite previous resolution result
                         saveResolution = false;
                     }
                     else {
-                        // First resolution of this library
-                        processSourceFile(resolvedTypeReferenceDirective.resolvedFileName, /*isDefaultLib*/ false, /*ignoreNoDefaultLib*/ false, resolvedTypeReferenceDirective.packageId, refFile, refPos, refEnd);
+                        processSourceFile(resolvedTypeReferenceDirective.resolvedFileName, false, false, resolvedTypeReferenceDirective.packageId, refFile, refPos, refEnd);
                     }
                 }
             }
             else {
-                fileProcessingDiagnostics.add(createDiagnostic(refFile, refPos, refEnd, ts.Diagnostics.Cannot_find_type_definition_file_for_0, typeReferenceDirective)); // TODO: GH#18217
+                fileProcessingDiagnostics.add(createDiagnostic(refFile, refPos, refEnd, ts.Diagnostics.Cannot_find_type_definition_file_for_0, typeReferenceDirective));
             }
             if (saveResolution) {
                 resolvedTypeReferenceDirectives.set(typeReferenceDirective, resolvedTypeReferenceDirective);
@@ -82434,8 +66775,7 @@ var ts;
                 var libName = libReference.fileName.toLocaleLowerCase();
                 var libFileName = ts.libMap.get(libName);
                 if (libFileName) {
-                    // we ignore any 'no-default-lib' reference set on this file.
-                    processRootFile(ts.combinePaths(defaultLibraryPath, libFileName), /*isDefaultLib*/ true, /*ignoreNoDefaultLib*/ true);
+                    processRootFile(ts.combinePaths(defaultLibraryPath, libFileName), true, true);
                 }
                 else {
                     var unqualifiedLibName = ts.removeSuffix(ts.removePrefix(libName, "lib."), ".d.ts");
@@ -82463,7 +66803,6 @@ var ts;
         function processImportedModules(file) {
             collectExternalModuleReferences(file);
             if (file.imports.length || file.moduleAugmentations.length) {
-                // Because global augmentation doesn't have string literal name, we can check for global augmentation as such.
                 var moduleNames = getModuleNames(file);
                 var oldProgramState = { program: oldProgram, oldSourceFile: oldProgram && oldProgram.getSourceFile(file.fileName), modifiedFilePaths: modifiedFilePaths };
                 var resolutions = resolveModuleNamesReusingOldState(moduleNames, ts.getNormalizedAbsolutePath(file.fileName, currentDirectory), file, oldProgramState);
@@ -82481,28 +66820,21 @@ var ts;
                     if (isFromNodeModulesSearch) {
                         currentNodeModulesDepth++;
                     }
-                    // add file to program only if:
-                    // - resolution was successful
-                    // - noResolve is falsy
-                    // - module name comes from the list of imports
-                    // - it's not a top level JavaScript module that exceeded the search max
                     var elideImport = isJsFileFromNodeModules && currentNodeModulesDepth > maxNodeModuleJsDepth;
-                    // Don't add the file if it has a bad extension (e.g. 'tsx' if we don't have '--allowJs')
-                    // This may still end up being an untyped module -- the file won't be included but imports will be allowed.
                     var shouldAddFile = resolvedFileName
                         && !getResolutionDiagnostic(options, resolution)
                         && !options.noResolve
                         && i < file.imports.length
                         && !elideImport
                         && !(isJsFile && !options.allowJs)
-                        && (ts.isInJavaScriptFile(file.imports[i]) || !(file.imports[i].flags & 2097152 /* JSDoc */));
+                        && (ts.isInJavaScriptFile(file.imports[i]) || !(file.imports[i].flags & 2097152));
                     if (elideImport) {
                         modulesWithElidedImports.set(file.path, true);
                     }
                     else if (shouldAddFile) {
                         var path = toPath(resolvedFileName);
                         var pos = ts.skipTrivia(file.text, file.imports[i].pos);
-                        findSourceFile(resolvedFileName, path, /*isDefaultLib*/ false, /*ignoreNoDefaultLib*/ false, file, pos, file.imports[i].end, resolution.packageId);
+                        findSourceFile(resolvedFileName, path, false, false, file, pos, file.imports[i].end, resolution.packageId);
                     }
                     if (isFromNodeModulesSearch) {
                         currentNodeModulesDepth--;
@@ -82510,7 +66842,6 @@ var ts;
                 }
             }
             else {
-                // no imports - drop cached module resolutions
                 file.resolvedModules = undefined;
             }
         }
@@ -82542,25 +66873,23 @@ var ts;
             return allFilesBelongToPath;
         }
         function parseProjectReferenceConfigFile(ref) {
-            // The actual filename (i.e. add "/tsconfig.json" if necessary)
-            var refPath = resolveProjectReferencePath(host, ref); // TODO: GH#18217
-            // An absolute path pointing to the containing directory of the config file
+            var refPath = resolveProjectReferencePath(host, ref);
             var basePath = ts.getNormalizedAbsolutePath(ts.getDirectoryPath(refPath), host.getCurrentDirectory());
-            var sourceFile = host.getSourceFile(refPath, 100 /* JSON */);
+            var sourceFile = host.getSourceFile(refPath, 100);
             if (sourceFile === undefined) {
                 return undefined;
             }
-            var commandLine = ts.parseJsonSourceFileConfigFileContent(sourceFile, configParsingHost, basePath, /*existingOptions*/ undefined, refPath);
+            var commandLine = ts.parseJsonSourceFileConfigFileContent(sourceFile, configParsingHost, basePath, undefined, refPath);
             return { commandLine: commandLine, sourceFile: sourceFile };
         }
         function addProjectReferenceRedirects(referencedProject, target) {
-            var rootDir = ts.normalizePath(referencedProject.options.rootDir || ts.getDirectoryPath(referencedProject.options.configFilePath)); // TODO: GH#18217
+            var rootDir = ts.normalizePath(referencedProject.options.rootDir || ts.getDirectoryPath(referencedProject.options.configFilePath));
             target.set(rootDir, getDeclarationOutputDirectory(referencedProject));
         }
         function getDeclarationOutputDirectory(proj) {
             return proj.options.declarationDir ||
                 proj.options.outDir ||
-                ts.getDirectoryPath(proj.options.configFilePath); // TODO: GH#18217
+                ts.getDirectoryPath(proj.options.configFilePath);
         }
         function verifyCompilerOptions() {
             if (options.strictPropertyInitialization && !options.strictNullChecks) {
@@ -82619,18 +66948,17 @@ var ts;
                     }
                 }
             }
-            // List of collected files is complete; validate exhautiveness if this is a project with a file list
             if (options.composite && rootNames.length < files.length) {
                 var normalizedRootNames = rootNames.map(function (r) { return ts.normalizePath(r).toLowerCase(); });
                 var sourceFiles = files.filter(function (f) { return !f.isDeclarationFile; }).map(function (f) { return ts.normalizePath(f.path).toLowerCase(); });
-                var _loop_8 = function (file) {
+                var _loop_11 = function (file) {
                     if (normalizedRootNames.every(function (r) { return r !== file; })) {
                         programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.File_0_is_not_in_project_file_list_Projects_must_list_all_files_or_use_an_include_pattern, file));
                     }
                 };
                 for (var _i = 0, sourceFiles_4 = sourceFiles; _i < sourceFiles_4.length; _i++) {
                     var file = sourceFiles_4[_i];
-                    _loop_8(file);
+                    _loop_11(file);
                 }
             }
             if (options.paths) {
@@ -82639,12 +66967,12 @@ var ts;
                         continue;
                     }
                     if (!ts.hasZeroOrOneAsteriskCharacter(key)) {
-                        createDiagnosticForOptionPaths(/*onKey*/ true, key, ts.Diagnostics.Pattern_0_can_have_at_most_one_Asterisk_character, key);
+                        createDiagnosticForOptionPaths(true, key, ts.Diagnostics.Pattern_0_can_have_at_most_one_Asterisk_character, key);
                     }
                     if (ts.isArray(options.paths[key])) {
                         var len = options.paths[key].length;
                         if (len === 0) {
-                            createDiagnosticForOptionPaths(/*onKey*/ false, key, ts.Diagnostics.Substitutions_for_pattern_0_shouldn_t_be_an_empty_array, key);
+                            createDiagnosticForOptionPaths(false, key, ts.Diagnostics.Substitutions_for_pattern_0_shouldn_t_be_an_empty_array, key);
                         }
                         for (var i = 0; i < len; i++) {
                             var subst = options.paths[key][i];
@@ -82660,7 +66988,7 @@ var ts;
                         }
                     }
                     else {
-                        createDiagnosticForOptionPaths(/*onKey*/ false, key, ts.Diagnostics.Substitutions_for_pattern_0_should_be_an_array, key);
+                        createDiagnosticForOptionPaths(false, key, ts.Diagnostics.Substitutions_for_pattern_0_should_be_an_array, key);
                     }
                 }
             }
@@ -82676,7 +67004,6 @@ var ts;
                 createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "out", "outFile");
             }
             if (options.mapRoot && !(options.sourceMap || options.declarationMap)) {
-                // Error to specify --mapRoot without --sourcemap
                 createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1_or_option_2, "mapRoot", "sourceMap", "declarationMap");
             }
             if (options.declarationDir) {
@@ -82696,11 +67023,11 @@ var ts;
             if (options.noImplicitUseStrict && ts.getStrictOptionValue(options, "alwaysStrict")) {
                 createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "noImplicitUseStrict", "alwaysStrict");
             }
-            var languageVersion = options.target || 0 /* ES3 */;
+            var languageVersion = options.target || 0;
             var outFile = options.outFile || options.out;
             var firstNonAmbientExternalModuleSourceFile = ts.forEach(files, function (f) { return ts.isExternalModule(f) && !f.isDeclarationFile ? f : undefined; });
             if (options.isolatedModules) {
-                if (options.module === ts.ModuleKind.None && languageVersion < 2 /* ES2015 */) {
+                if (options.module === ts.ModuleKind.None && languageVersion < 2) {
                     createDiagnosticForOptionName(ts.Diagnostics.Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES2015_or_higher, "isolatedModules", "target");
                 }
                 var firstNonExternalModuleSourceFile = ts.forEach(files, function (f) { return !ts.isExternalModule(f) && !f.isDeclarationFile ? f : undefined; });
@@ -82709,12 +67036,10 @@ var ts;
                     programDiagnostics.add(ts.createFileDiagnostic(firstNonExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided));
                 }
             }
-            else if (firstNonAmbientExternalModuleSourceFile && languageVersion < 2 /* ES2015 */ && options.module === ts.ModuleKind.None) {
-                // We cannot use createDiagnosticFromNode because nodes do not have parents yet
+            else if (firstNonAmbientExternalModuleSourceFile && languageVersion < 2 && options.module === ts.ModuleKind.None) {
                 var span = ts.getErrorSpanForNode(firstNonAmbientExternalModuleSourceFile, firstNonAmbientExternalModuleSourceFile.externalModuleIndicator);
                 programDiagnostics.add(ts.createFileDiagnostic(firstNonAmbientExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_use_imports_exports_or_module_augmentations_when_module_is_none));
             }
-            // Cannot specify module gen that isn't amd or system with --out
             if (outFile) {
                 if (options.module && !(options.module === ts.ModuleKind.AMD || options.module === ts.ModuleKind.System)) {
                     createDiagnosticForOptionName(ts.Diagnostics.Only_amd_and_system_modules_are_supported_alongside_0, options.out ? "out" : "outFile", "module");
@@ -82729,14 +67054,10 @@ var ts;
                     createDiagnosticForOptionName(ts.Diagnostics.Option_resolveJsonModule_cannot_be_specified_without_node_module_resolution_strategy, "resolveJsonModule");
                 }
             }
-            // there has to be common source directory if user specified --outdir || --sourceRoot
-            // if user specified --mapRoot, there needs to be common source directory if there would be multiple files being emitted
-            if (options.outDir || // there is --outDir specified
-                options.sourceRoot || // there is --sourceRoot specified
-                options.mapRoot) { // there is --mapRoot specified
-                // Precalculate and cache the common source directory
+            if (options.outDir ||
+                options.sourceRoot ||
+                options.mapRoot) {
                 var dir = getCommonSourceDirectory();
-                // If we failed to find a good common directory, but outDir is specified and at least one of our files is on a windows drive/URL/other resource, add a failure
                 if (options.outDir && dir === "" && ts.forEach(files, function (file) { return ts.getRootLength(file.fileName) > 1; })) {
                     createDiagnosticForOptionName(ts.Diagnostics.Cannot_find_the_common_subdirectory_path_for_the_input_files, "outDir");
                 }
@@ -82770,7 +67091,6 @@ var ts;
             else if (options.reactNamespace && !ts.isIdentifierText(options.reactNamespace, languageVersion)) {
                 createOptionValueDiagnostic("reactNamespace", ts.Diagnostics.Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier, options.reactNamespace);
             }
-            // If the emit is enabled make sure that every output file is unique and not overwriting any of the input files
             if (!options.noEmit && !options.suppressOutputPathCheck) {
                 var emitHost = getEmitHost();
                 var emitFilesSeen_1 = ts.createMap();
@@ -82781,24 +67101,19 @@ var ts;
                     verifyEmitFilePath(emitFileNames.declarationFilePath, emitFilesSeen_1);
                 });
             }
-            // Verify that all the emit files are unique and don't overwrite input files
             function verifyEmitFilePath(emitFileName, emitFilesSeen) {
                 if (emitFileName) {
                     var emitFilePath = toPath(emitFileName);
-                    // Report error if the output overwrites input file
                     if (filesByName.has(emitFilePath)) {
                         var chain_2;
                         if (!options.configFilePath) {
-                            // The program is from either an inferred project or an external project
-                            chain_2 = ts.chainDiagnosticMessages(/*details*/ undefined, ts.Diagnostics.Adding_a_tsconfig_json_file_will_help_organize_projects_that_contain_both_TypeScript_and_JavaScript_files_Learn_more_at_https_Colon_Slash_Slashaka_ms_Slashtsconfig);
+                            chain_2 = ts.chainDiagnosticMessages(undefined, ts.Diagnostics.Adding_a_tsconfig_json_file_will_help_organize_projects_that_contain_both_TypeScript_and_JavaScript_files_Learn_more_at_https_Colon_Slash_Slashaka_ms_Slashtsconfig);
                         }
                         chain_2 = ts.chainDiagnosticMessages(chain_2, ts.Diagnostics.Cannot_write_file_0_because_it_would_overwrite_input_file, emitFileName);
                         blockEmittingOfFile(emitFileName, ts.createCompilerDiagnosticFromMessageChain(chain_2));
                     }
                     var emitFileKey = !host.useCaseSensitiveFileNames() ? emitFilePath.toLocaleLowerCase() : emitFilePath;
-                    // Report error if multiple files write into same file
                     if (emitFilesSeen.has(emitFileKey)) {
-                        // Already seen the same emit file - report error
                         blockEmittingOfFile(emitFileName, ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files, emitFileName));
                     }
                     else {
@@ -82833,7 +67148,7 @@ var ts;
             for (var _i = 0, pathsSyntax_2 = pathsSyntax; _i < pathsSyntax_2.length; _i++) {
                 var pathProp = pathsSyntax_2[_i];
                 if (ts.isObjectLiteralExpression(pathProp.initializer) &&
-                    createOptionDiagnosticInObjectLiteralSyntax(pathProp.initializer, onKey, key, /*key2*/ undefined, message, arg0)) {
+                    createOptionDiagnosticInObjectLiteralSyntax(pathProp.initializer, onKey, key, undefined, message, arg0)) {
                     needCompilerDiagnostic = false;
                 }
             }
@@ -82852,10 +67167,10 @@ var ts;
             return getOptionsSyntaxByName("paths") || ts.emptyArray;
         }
         function createDiagnosticForOptionName(message, option1, option2, option3) {
-            createDiagnosticForOption(/*onKey*/ true, option1, option2, message, option1, option2, option3);
+            createDiagnosticForOption(true, option1, option2, message, option1, option2, option3);
         }
         function createOptionValueDiagnostic(option1, message, arg0) {
-            createDiagnosticForOption(/*onKey*/ false, option1, /*option2*/ undefined, message, arg0);
+            createDiagnosticForOption(false, option1, undefined, message, arg0);
         }
         function createDiagnosticForReference(index, message, arg0, arg1) {
             var referencesSyntax = getProjectReferencesSyntax();
@@ -82876,9 +67191,9 @@ var ts;
         }
         function getProjectReferencesSyntax() {
             if (_referencesArrayLiteralSyntax === undefined) {
-                _referencesArrayLiteralSyntax = null; // tslint:disable-line:no-null-keyword
+                _referencesArrayLiteralSyntax = null;
                 if (options.configFile) {
-                    var jsonObjectLiteral = ts.getTsConfigObjectLiteralExpression(options.configFile); // TODO: GH#18217
+                    var jsonObjectLiteral = ts.getTsConfigObjectLiteralExpression(options.configFile);
                     for (var _i = 0, _a = ts.getPropertyAssignment(jsonObjectLiteral, "references"); _i < _a.length; _i++) {
                         var prop = _a[_i];
                         if (ts.isArrayLiteralExpression(prop.initializer)) {
@@ -82892,7 +67207,7 @@ var ts;
         }
         function getCompilerOptionsObjectLiteralSyntax() {
             if (_compilerOptionsObjectLiteralSyntax === undefined) {
-                _compilerOptionsObjectLiteralSyntax = null; // tslint:disable-line:no-null-keyword
+                _compilerOptionsObjectLiteralSyntax = null;
                 var jsonObjectLiteral = ts.getTsConfigObjectLiteralExpression(options.configFile);
                 if (jsonObjectLiteral) {
                     for (var _i = 0, _a = ts.getPropertyAssignment(jsonObjectLiteral, "compilerOptions"); _i < _a.length; _i++) {
@@ -82916,11 +67231,10 @@ var ts;
         }
         function createOptionDiagnosticInArrayLiteralSyntax(arrayLiteral, index, message, arg0, arg1, arg2) {
             if (arrayLiteral.elements.length <= index) {
-                // Out-of-bounds
                 return false;
             }
             programDiagnostics.add(ts.createDiagnosticForNodeInSourceFile(options.configFile, arrayLiteral.elements[index], message, arg0, arg1, arg2));
-            return false; // TODO: GH#18217 This function always returns `false`!`
+            return false;
         }
         function blockEmittingOfFile(emitFileName, diag) {
             hasEmitBlockingDiagnostics.set(toPath(emitFileName), true);
@@ -82930,38 +67244,32 @@ var ts;
             if (options.noEmit) {
                 return false;
             }
-            // If this is source file, its not emitted file
             var filePath = toPath(file);
             if (getSourceFileByPath(filePath)) {
                 return false;
             }
-            // If options have --outFile or --out just check that
             var out = options.outFile || options.out;
             if (out) {
-                return isSameFile(filePath, out) || isSameFile(filePath, ts.removeFileExtension(out) + ".d.ts" /* Dts */);
+                return isSameFile(filePath, out) || isSameFile(filePath, ts.removeFileExtension(out) + ".d.ts");
             }
-            // If declarationDir is specified, return if its a file in that directory
             if (options.declarationDir && ts.containsPath(options.declarationDir, filePath, currentDirectory, !host.useCaseSensitiveFileNames())) {
                 return true;
             }
-            // If --outDir, check if file is in that directory
             if (options.outDir) {
                 return ts.containsPath(options.outDir, filePath, currentDirectory, !host.useCaseSensitiveFileNames());
             }
-            if (ts.fileExtensionIsOneOf(filePath, ts.supportedJavascriptExtensions) || ts.fileExtensionIs(filePath, ".d.ts" /* Dts */)) {
-                // Otherwise just check if sourceFile with the name exists
+            if (ts.fileExtensionIsOneOf(filePath, ts.supportedJavascriptExtensions) || ts.fileExtensionIs(filePath, ".d.ts")) {
                 var filePathWithoutExtension = ts.removeFileExtension(filePath);
-                return !!getSourceFileByPath((filePathWithoutExtension + ".ts" /* Ts */)) ||
-                    !!getSourceFileByPath((filePathWithoutExtension + ".tsx" /* Tsx */));
+                return !!getSourceFileByPath((filePathWithoutExtension + ".ts")) ||
+                    !!getSourceFileByPath((filePathWithoutExtension + ".tsx"));
             }
             return false;
         }
         function isSameFile(file1, file2) {
-            return ts.comparePaths(file1, file2, currentDirectory, !host.useCaseSensitiveFileNames()) === 0 /* EqualTo */;
+            return ts.comparePaths(file1, file2, currentDirectory, !host.useCaseSensitiveFileNames()) === 0;
         }
     }
     ts.createProgram = createProgram;
-    /* @internal */
     function parseConfigHostFromCompilerHost(host) {
         return {
             fileExists: function (f) { return host.fileExists(f); },
@@ -82973,9 +67281,6 @@ var ts;
         };
     }
     ts.parseConfigHostFromCompilerHost = parseConfigHostFromCompilerHost;
-    /**
-     * Returns the target config filename of a project reference
-     */
     function resolveProjectReferencePath(host, ref) {
         if (!host.fileExists(ref.path)) {
             return ts.combinePaths(ref.path, "tsconfig.json");
@@ -82983,25 +67288,18 @@ var ts;
         return ref.path;
     }
     ts.resolveProjectReferencePath = resolveProjectReferencePath;
-    /* @internal */
-    /**
-     * Returns a DiagnosticMessage if we won't include a resolved module due to its extension.
-     * The DiagnosticMessage's parameters are the imported module name, and the filename it resolved to.
-     * This returns a diagnostic even if the module will be an untyped module.
-     */
     function getResolutionDiagnostic(options, _a) {
         var extension = _a.extension;
         switch (extension) {
-            case ".ts" /* Ts */:
-            case ".d.ts" /* Dts */:
-            case ".json" /* Json */: // Since module is resolved to json file only when --resolveJsonModule, we dont need further check
-                // These are always allowed.
+            case ".ts":
+            case ".d.ts":
+            case ".json":
                 return undefined;
-            case ".tsx" /* Tsx */:
+            case ".tsx":
                 return needJsx();
-            case ".jsx" /* Jsx */:
+            case ".jsx":
                 return needJsx() || needAllowJs();
-            case ".js" /* Js */:
+            case ".js":
                 return needAllowJs();
         }
         function needJsx() {
@@ -83017,15 +67315,13 @@ var ts;
         var res = imports.map(function (i) { return i.text; });
         for (var _i = 0, moduleAugmentations_1 = moduleAugmentations; _i < moduleAugmentations_1.length; _i++) {
             var aug = moduleAugmentations_1[_i];
-            if (aug.kind === 9 /* StringLiteral */) {
+            if (aug.kind === 9) {
                 res.push(aug.text);
             }
-            // Do nothing if it's an Identifier; we don't need to do module resolution for `declare global`.
         }
         return res;
     }
 })(ts || (ts = {}));
-/*@internal*/
 var ts;
 (function (ts) {
     function getFileEmitOutput(program, sourceFile, emitOnlyDtsFiles, cancellationToken, customTransformers) {
@@ -83038,18 +67334,11 @@ var ts;
     }
     ts.getFileEmitOutput = getFileEmitOutput;
 })(ts || (ts = {}));
-/*@internal*/
 (function (ts) {
     var BuilderState;
     (function (BuilderState) {
-        /**
-         * Gets the referenced files for a file from the program with values for the keys as referenced file's path to be true
-         */
         function getReferencedFiles(program, sourceFile, getCanonicalFileName) {
             var referencedFiles;
-            // We need to use a set here since the code can contain the same import twice,
-            // but that will only be one dependency.
-            // To avoid invernal conversion, the key of the referencedFiles map must be of type Path
             if (sourceFile.imports && sourceFile.imports.length > 0) {
                 var checker = program.getTypeChecker();
                 for (var _i = 0, _a = sourceFile.imports; _i < _a.length; _i++) {
@@ -83064,7 +67353,6 @@ var ts;
                 }
             }
             var sourceFileDirectory = ts.getDirectoryPath(sourceFile.path);
-            // Handle triple slash references
             if (sourceFile.referencedFiles && sourceFile.referencedFiles.length > 0) {
                 for (var _b = 0, _c = sourceFile.referencedFiles; _b < _c.length; _b++) {
                     var referencedFile = _c[_b];
@@ -83072,13 +67360,12 @@ var ts;
                     addReferencedFile(referencedPath);
                 }
             }
-            // Handle type reference directives
             if (sourceFile.resolvedTypeReferenceDirectiveNames) {
                 sourceFile.resolvedTypeReferenceDirectiveNames.forEach(function (resolvedTypeReferenceDirective) {
                     if (!resolvedTypeReferenceDirective) {
                         return;
                     }
-                    var fileName = resolvedTypeReferenceDirective.resolvedFileName; // TODO: GH#18217
+                    var fileName = resolvedTypeReferenceDirective.resolvedFileName;
                     var typeFilePath = ts.toPath(fileName, sourceFileDirectory, getCanonicalFileName);
                     addReferencedFile(typeFilePath);
                 });
@@ -83091,22 +67378,15 @@ var ts;
                 referencedFiles.set(referencedPath, true);
             }
         }
-        /**
-         * Returns true if oldState is reusable, that is the emitKind = module/non module has not changed
-         */
         function canReuseOldState(newReferencedMap, oldState) {
             return oldState && !oldState.referencedMap === !newReferencedMap;
         }
         BuilderState.canReuseOldState = canReuseOldState;
-        /**
-         * Creates the state of file references and signature for the new program from oldState if it is safe
-         */
         function create(newProgram, getCanonicalFileName, oldState) {
             var fileInfos = ts.createMap();
             var referencedMap = newProgram.getCompilerOptions().module !== ts.ModuleKind.None ? ts.createMap() : undefined;
             var hasCalledUpdateShapeSignature = ts.createMap();
             var useOldState = canReuseOldState(referencedMap, oldState);
-            // Create the reference map, and set the file infos
             for (var _i = 0, _a = newProgram.getSourceFiles(); _i < _a.length; _i++) {
                 var sourceFile = _a[_i];
                 var version_1 = sourceFile.version;
@@ -83128,14 +67408,7 @@ var ts;
             };
         }
         BuilderState.create = create;
-        /**
-         * Gets the files affected by the path from the program
-         */
         function getFilesAffectedBy(state, programOfThisState, path, cancellationToken, computeHash, cacheToUpdateSignature) {
-            // Since the operation could be cancelled, the signatures are always stored in the cache
-            // They will be commited once it is safe to use them
-            // eg when calling this api from tsserver, if there is no cancellation of the operation
-            // In the other cases the affected files signatures are commited only after the iteration through the result is complete
             var signatureCache = cacheToUpdateSignature || ts.createMap();
             var sourceFile = programOfThisState.getSourceFileByPath(path);
             if (!sourceFile) {
@@ -83146,16 +67419,11 @@ var ts;
             }
             var result = (state.referencedMap ? getFilesAffectedByUpdatedShapeWhenModuleEmit : getFilesAffectedByUpdatedShapeWhenNonModuleEmit)(state, programOfThisState, sourceFile, signatureCache, cancellationToken, computeHash);
             if (!cacheToUpdateSignature) {
-                // Commit all the signatures in the signature cache
                 updateSignaturesFromCache(state, signatureCache);
             }
             return result;
         }
         BuilderState.getFilesAffectedBy = getFilesAffectedBy;
-        /**
-         * Updates the signatures from the cache into state's fileinfo signatures
-         * This should be called whenever it is safe to commit the state of the builder
-         */
         function updateSignaturesFromCache(state, signatureCache) {
             signatureCache.forEach(function (signature, path) {
                 state.fileInfos.get(path).signature = signature;
@@ -83163,12 +67431,8 @@ var ts;
             });
         }
         BuilderState.updateSignaturesFromCache = updateSignaturesFromCache;
-        /**
-         * Returns if the shape of the signature has changed since last emit
-         */
         function updateShapeSignature(state, programOfThisState, sourceFile, cacheToUpdateSignature, cancellationToken, computeHash) {
             ts.Debug.assert(!!sourceFile);
-            // If we have cached the result for this file, that means hence forth we should assume file shape is uptodate
             if (state.hasCalledUpdateShapeSignature.has(sourceFile.path) || cacheToUpdateSignature.has(sourceFile.path)) {
                 return false;
             }
@@ -83181,32 +67445,26 @@ var ts;
                 latestSignature = sourceFile.version;
             }
             else {
-                var emitOutput = ts.getFileEmitOutput(programOfThisState, sourceFile, /*emitOnlyDtsFiles*/ true, cancellationToken);
+                var emitOutput = ts.getFileEmitOutput(programOfThisState, sourceFile, true, cancellationToken);
                 if (emitOutput.outputFiles && emitOutput.outputFiles.length > 0) {
                     latestSignature = computeHash(emitOutput.outputFiles[0].text);
                 }
                 else {
-                    latestSignature = prevSignature; // TODO: GH#18217
+                    latestSignature = prevSignature;
                 }
             }
             cacheToUpdateSignature.set(sourceFile.path, latestSignature);
             return !prevSignature || latestSignature !== prevSignature;
         }
-        /**
-         * Get all the dependencies of the sourceFile
-         */
         function getAllDependencies(state, programOfThisState, sourceFile) {
             var _a;
             var compilerOptions = programOfThisState.getCompilerOptions();
-            // With --out or --outFile all outputs go into single file, all files depend on each other
             if (compilerOptions.outFile || compilerOptions.out) {
                 return getAllFileNames(state, programOfThisState);
             }
-            // If this is non module emit, or its a global file, it depends on all the source files
             if (!state.referencedMap || (!ts.isExternalModule(sourceFile) && !containsOnlyAmbientModules(sourceFile))) {
                 return getAllFileNames(state, programOfThisState);
             }
-            // Get the references, traversing deep from the referenceMap
             var seenMap = ts.createMap();
             var queue = [sourceFile.path];
             while (queue.length) {
@@ -83228,9 +67486,6 @@ var ts;
             }));
         }
         BuilderState.getAllDependencies = getAllDependencies;
-        /**
-         * Gets the names of all files from the program
-         */
         function getAllFileNames(state, programOfThisState) {
             if (!state.allFileNames) {
                 var sourceFiles = programOfThisState.getSourceFiles();
@@ -83238,21 +67493,12 @@ var ts;
             }
             return state.allFileNames;
         }
-        /**
-         * Gets the files referenced by the the file path
-         */
         function getReferencedByPaths(state, referencedFilePath) {
             return ts.arrayFrom(ts.mapDefinedIterator(state.referencedMap.entries(), function (_a) {
                 var filePath = _a[0], referencesInFile = _a[1];
                 return referencesInFile.has(referencedFilePath) ? filePath : undefined;
             }));
         }
-        /**
-         * For script files that contains only ambient external modules, although they are not actually external module files,
-         * they can only be consumed via importing elements from them. Regular script files cannot consume them. Therefore,
-         * there are no point to rebuild all script files if these special files have changed. However, if any statement
-         * in the file is not ambient external module, we treat it as a regular script file.
-         */
         function containsOnlyAmbientModules(sourceFile) {
             for (var _i = 0, _a = sourceFile.statements; _i < _a.length; _i++) {
                 var statement = _a[_i];
@@ -83262,11 +67508,7 @@ var ts;
             }
             return true;
         }
-        /**
-         * Gets all files of the program excluding the default library file
-         */
         function getAllFilesExcludingDefaultLibraryFile(state, programOfThisState, firstSourceFile) {
-            // Use cached result
             if (state.allFilesExcludingDefaultLibraryFile) {
                 return state.allFilesExcludingDefaultLibraryFile;
             }
@@ -83286,21 +67528,13 @@ var ts;
                 }
             }
         }
-        /**
-         * When program emits non modular code, gets the files affected by the sourceFile whose shape has changed
-         */
         function getFilesAffectedByUpdatedShapeWhenNonModuleEmit(state, programOfThisState, sourceFileWithUpdatedShape) {
             var compilerOptions = programOfThisState.getCompilerOptions();
-            // If `--out` or `--outFile` is specified, any new emit will result in re-emitting the entire project,
-            // so returning the file itself is good enough.
             if (compilerOptions && (compilerOptions.out || compilerOptions.outFile)) {
                 return [sourceFileWithUpdatedShape];
             }
             return getAllFilesExcludingDefaultLibraryFile(state, programOfThisState, sourceFileWithUpdatedShape);
         }
-        /**
-         * When program emits modular code, gets the files affected by the sourceFile whose shape has changed
-         */
         function getFilesAffectedByUpdatedShapeWhenModuleEmit(state, programOfThisState, sourceFileWithUpdatedShape, cacheToUpdateSignature, cancellationToken, computeHash) {
             if (!ts.isExternalModule(sourceFileWithUpdatedShape) && !containsOnlyAmbientModules(sourceFileWithUpdatedShape)) {
                 return getAllFilesExcludingDefaultLibraryFile(state, programOfThisState, sourceFileWithUpdatedShape);
@@ -83309,11 +67543,7 @@ var ts;
             if (compilerOptions && (compilerOptions.isolatedModules || compilerOptions.out || compilerOptions.outFile)) {
                 return [sourceFileWithUpdatedShape];
             }
-            // Now we need to if each file in the referencedBy list has a shape change as well.
-            // Because if so, its own referencedBy files need to be saved as well to make the
-            // emitting result consistent with files on disk.
             var seenFileNamesMap = ts.createMap();
-            // Start with the paths this file was referenced by
             seenFileNamesMap.set(sourceFileWithUpdatedShape.path, sourceFileWithUpdatedShape);
             var queue = getReferencedByPaths(state, sourceFileWithUpdatedShape.path);
             while (queue.length > 0) {
@@ -83321,28 +67551,20 @@ var ts;
                 if (!seenFileNamesMap.has(currentPath)) {
                     var currentSourceFile = programOfThisState.getSourceFileByPath(currentPath);
                     seenFileNamesMap.set(currentPath, currentSourceFile);
-                    if (currentSourceFile && updateShapeSignature(state, programOfThisState, currentSourceFile, cacheToUpdateSignature, cancellationToken, computeHash)) { // TODO: GH#18217
-                        queue.push.apply(// TODO: GH#18217
-                        queue, getReferencedByPaths(state, currentPath));
+                    if (currentSourceFile && updateShapeSignature(state, programOfThisState, currentSourceFile, cacheToUpdateSignature, cancellationToken, computeHash)) {
+                        queue.push.apply(queue, getReferencedByPaths(state, currentPath));
                     }
                 }
             }
-            // Return array of values that needs emit
-            // Return array of values that needs emit
             return ts.arrayFrom(ts.mapDefinedIterator(seenFileNamesMap.values(), function (value) { return value; }));
         }
     })(BuilderState = ts.BuilderState || (ts.BuilderState = {}));
 })(ts || (ts = {}));
-/*@internal*/
 var ts;
 (function (ts) {
     function hasSameKeys(map1, map2) {
-        // Has same size and every key is present in both maps
         return map1 === map2 || map1 !== undefined && map2 !== undefined && map1.size === map2.size && !ts.forEachKey(map1, function (key) { return !map2.has(key); });
     }
-    /**
-     * Create the state so that we can iterate on changedFiles/affected files
-     */
     function createBuilderProgramState(newProgram, getCanonicalFileName, oldState) {
         var state = ts.BuilderState.create(newProgram, getCanonicalFileName, oldState);
         state.program = newProgram;
@@ -83354,37 +67576,27 @@ var ts;
         var useOldState = ts.BuilderState.canReuseOldState(state.referencedMap, oldState);
         var canCopySemanticDiagnostics = useOldState && oldState.semanticDiagnosticsPerFile && !!state.semanticDiagnosticsPerFile;
         if (useOldState) {
-            // Verify the sanity of old state
             if (!oldState.currentChangedFilePath) {
                 ts.Debug.assert(!oldState.affectedFiles && (!oldState.currentAffectedFilesSignatures || !oldState.currentAffectedFilesSignatures.size), "Cannot reuse if only few affected files of currentChangedFile were iterated");
             }
             if (canCopySemanticDiagnostics) {
                 ts.Debug.assert(!ts.forEachKey(oldState.changedFilesSet, function (path) { return oldState.semanticDiagnosticsPerFile.has(path); }), "Semantic diagnostics shouldnt be available for changed files");
             }
-            // Copy old state's changed files set
             ts.copyEntries(oldState.changedFilesSet, state.changedFilesSet);
         }
-        // Update changed files and copy semantic diagnostics if we can
         var referencedMap = state.referencedMap;
         var oldReferencedMap = useOldState ? oldState.referencedMap : undefined;
         state.fileInfos.forEach(function (info, sourceFilePath) {
             var oldInfo;
             var newReferences;
-            // if not using old state, every file is changed
             if (!useOldState ||
-                // File wasnt present in old state
                 !(oldInfo = oldState.fileInfos.get(sourceFilePath)) ||
-                // versions dont match
                 oldInfo.version !== info.version ||
-                // Referenced files changed
                 !hasSameKeys(newReferences = referencedMap && referencedMap.get(sourceFilePath), oldReferencedMap && oldReferencedMap.get(sourceFilePath)) ||
-                // Referenced file was deleted in the new program
                 newReferences && ts.forEachKey(newReferences, function (path) { return !state.fileInfos.has(path) && oldState.fileInfos.has(path); })) {
-                // Register file as changed file and do not copy semantic diagnostics, since all changed files need to be re-evaluated
                 state.changedFilesSet.set(sourceFilePath, true);
             }
             else if (canCopySemanticDiagnostics) {
-                // Unchanged file copy diagnostics
                 var diagnostics = oldState.semanticDiagnosticsPerFile.get(sourceFilePath);
                 if (diagnostics) {
                     state.semanticDiagnosticsPerFile.set(sourceFilePath, diagnostics);
@@ -83393,28 +67605,18 @@ var ts;
         });
         return state;
     }
-    /**
-     * Verifies that source file is ok to be used in calls that arent handled by next
-     */
     function assertSourceFileOkWithoutNextAffectedCall(state, sourceFile) {
         ts.Debug.assert(!sourceFile || !state.affectedFiles || state.affectedFiles[state.affectedFilesIndex - 1] !== sourceFile || !state.semanticDiagnosticsPerFile.has(sourceFile.path));
     }
-    /**
-     * This function returns the next affected file to be processed.
-     * Note that until doneAffected is called it would keep reporting same result
-     * This is to allow the callers to be able to actually remove affected file only when the operation is complete
-     * eg. if during diagnostics check cancellation token ends up cancelling the request, the affected file should be retained
-     */
     function getNextAffectedFile(state, cancellationToken, computeHash) {
         while (true) {
             var affectedFiles = state.affectedFiles;
             if (affectedFiles) {
                 var seenAffectedFiles = state.seenAffectedFiles, semanticDiagnosticsPerFile = state.semanticDiagnosticsPerFile;
-                var affectedFilesIndex = state.affectedFilesIndex; // TODO: GH#18217
+                var affectedFilesIndex = state.affectedFilesIndex;
                 while (affectedFilesIndex < affectedFiles.length) {
                     var affectedFile = affectedFiles[affectedFilesIndex];
                     if (!seenAffectedFiles.has(affectedFile.path)) {
-                        // Set the next affected file as seen and remove the cached semantic diagnostics
                         state.affectedFilesIndex = affectedFilesIndex;
                         semanticDiagnosticsPerFile.delete(affectedFile.path);
                         return affectedFile;
@@ -83422,28 +67624,21 @@ var ts;
                     seenAffectedFiles.set(affectedFile.path, true);
                     affectedFilesIndex++;
                 }
-                // Remove the changed file from the change set
                 state.changedFilesSet.delete(state.currentChangedFilePath);
                 state.currentChangedFilePath = undefined;
-                // Commit the changes in file signature
                 ts.BuilderState.updateSignaturesFromCache(state, state.currentAffectedFilesSignatures);
                 state.currentAffectedFilesSignatures.clear();
                 state.affectedFiles = undefined;
             }
-            // Get next changed file
             var nextKey = state.changedFilesSet.keys().next();
             if (nextKey.done) {
-                // Done
                 return undefined;
             }
-            // With --out or --outFile all outputs go into single file
-            // so operations are performed directly on program, return program
             var compilerOptions = state.program.getCompilerOptions();
             if (compilerOptions.outFile || compilerOptions.out) {
                 ts.Debug.assert(!state.semanticDiagnosticsPerFile);
                 return state.program;
             }
-            // Get next batch of affected files
             state.currentAffectedFilesSignatures = state.currentAffectedFilesSignatures || ts.createMap();
             state.affectedFiles = ts.BuilderState.getFilesAffectedBy(state, state.program, nextKey.value, cancellationToken, computeHash, state.currentAffectedFilesSignatures);
             state.currentChangedFilePath = nextKey.value;
@@ -83452,10 +67647,6 @@ var ts;
             state.seenAffectedFiles = state.seenAffectedFiles || ts.createMap();
         }
     }
-    /**
-     * This is called after completing operation on the next affected file.
-     * The operations here are postponed to ensure that cancellation during the iteration is handled correctly
-     */
     function doneWithAffectedFile(state, affected) {
         if (affected === state.program) {
             state.changedFilesSet.clear();
@@ -83465,25 +67656,16 @@ var ts;
             state.affectedFilesIndex++;
         }
     }
-    /**
-     * Returns the result with affected file
-     */
     function toAffectedFileResult(state, result, affected) {
         doneWithAffectedFile(state, affected);
         return { result: result, affected: affected };
     }
-    /**
-     * Gets the semantic diagnostics either from cache if present, or otherwise from program and caches it
-     * Note that it is assumed that the when asked about semantic diagnostics, the file has been taken out of affected files/changed file set
-     */
     function getSemanticDiagnosticsOfFile(state, sourceFile, cancellationToken) {
         var path = sourceFile.path;
         var cachedDiagnostics = state.semanticDiagnosticsPerFile.get(path);
-        // Report the semantic diagnostics from the cache if we already have those diagnostics present
         if (cachedDiagnostics) {
             return cachedDiagnostics;
         }
-        // Diagnostics werent cached, get them from program, and cache the result
         var diagnostics = state.program.getSemanticDiagnostics(sourceFile, cancellationToken);
         state.semanticDiagnosticsPerFile.set(path, diagnostics);
         return diagnostics;
@@ -83520,24 +67702,16 @@ var ts;
     ts.getBuilderCreationParameters = getBuilderCreationParameters;
     function createBuilderProgram(kind, _a) {
         var newProgram = _a.newProgram, host = _a.host, oldProgram = _a.oldProgram, configFileParsingDiagnostics = _a.configFileParsingDiagnostics;
-        // Return same program if underlying program doesnt change
         var oldState = oldProgram && oldProgram.getState();
         if (oldState && newProgram === oldState.program && configFileParsingDiagnostics === newProgram.getConfigFileParsingDiagnostics()) {
-            newProgram = undefined; // TODO: GH#18217
+            newProgram = undefined;
             oldState = undefined;
             return oldProgram;
         }
-        /**
-         * Create the canonical file name for identity
-         */
         var getCanonicalFileName = ts.createGetCanonicalFileName(host.useCaseSensitiveFileNames());
-        /**
-         * Computing hash to for signature verification
-         */
         var computeHash = host.createHash || ts.identity;
         var state = createBuilderProgramState(newProgram, getCanonicalFileName, oldState);
-        // To ensure that we arent storing any references to old program or new program without state
-        newProgram = undefined; // TODO: GH#18217
+        newProgram = undefined;
         oldProgram = undefined;
         oldState = undefined;
         var result = {
@@ -83565,38 +67739,17 @@ var ts;
             ts.notImplemented();
         }
         return result;
-        /**
-         * Emits the next affected file's emit result (EmitResult and sourceFiles emitted) or returns undefined if iteration is complete
-         * The first of writeFile if provided, writeFile of BuilderProgramHost if provided, writeFile of compiler host
-         * in that order would be used to write the files
-         */
         function emitNextAffectedFile(writeFile, cancellationToken, emitOnlyDtsFiles, customTransformers) {
             var affected = getNextAffectedFile(state, cancellationToken, computeHash);
             if (!affected) {
-                // Done
                 return undefined;
             }
-            return toAffectedFileResult(state, 
-            // When whole program is affected, do emit only once (eg when --out or --outFile is specified)
-            // Otherwise just affected file
-            state.program.emit(affected === state.program ? undefined : affected, writeFile || host.writeFile, cancellationToken, emitOnlyDtsFiles, customTransformers), affected);
-        }
-        /**
-         * Emits the JavaScript and declaration files.
-         * When targetSource file is specified, emits the files corresponding to that source file,
-         * otherwise for the whole program.
-         * In case of EmitAndSemanticDiagnosticsBuilderProgram, when targetSourceFile is specified,
-         * it is assumed that that file is handled from affected file list. If targetSourceFile is not specified,
-         * it will only emit all the affected files instead of whole program
-         *
-         * The first of writeFile if provided, writeFile of BuilderProgramHost if provided, writeFile of compiler host
-         * in that order would be used to write the files
-         */
+            return toAffectedFileResult(state, state.program.emit(affected === state.program ? undefined : affected, writeFile || host.writeFile, cancellationToken, emitOnlyDtsFiles, customTransformers), affected);
+        }
         function emit(targetSourceFile, writeFile, cancellationToken, emitOnlyDtsFiles, customTransformers) {
             if (kind === BuilderProgramKind.EmitAndSemanticDiagnosticsBuilderProgram) {
                 assertSourceFileOkWithoutNextAffectedCall(state, targetSourceFile);
                 if (!targetSourceFile) {
-                    // Emit and report any errors we ran into.
                     var sourceMaps = [];
                     var emitSkipped = false;
                     var diagnostics = void 0;
@@ -83618,52 +67771,33 @@ var ts;
             }
             return state.program.emit(targetSourceFile, writeFile || host.writeFile, cancellationToken, emitOnlyDtsFiles, customTransformers);
         }
-        /**
-         * Return the semantic diagnostics for the next affected file or undefined if iteration is complete
-         * If provided ignoreSourceFile would be called before getting the diagnostics and would ignore the sourceFile if the returned value was true
-         */
         function getSemanticDiagnosticsOfNextAffectedFile(cancellationToken, ignoreSourceFile) {
             while (true) {
                 var affected = getNextAffectedFile(state, cancellationToken, computeHash);
                 if (!affected) {
-                    // Done
                     return undefined;
                 }
                 else if (affected === state.program) {
-                    // When whole program is affected, get all semantic diagnostics (eg when --out or --outFile is specified)
-                    return toAffectedFileResult(state, state.program.getSemanticDiagnostics(/*targetSourceFile*/ undefined, cancellationToken), affected);
+                    return toAffectedFileResult(state, state.program.getSemanticDiagnostics(undefined, cancellationToken), affected);
                 }
-                // Get diagnostics for the affected file if its not ignored
                 if (ignoreSourceFile && ignoreSourceFile(affected)) {
-                    // Get next affected file
                     doneWithAffectedFile(state, affected);
                     continue;
                 }
                 return toAffectedFileResult(state, getSemanticDiagnosticsOfFile(state, affected, cancellationToken), affected);
             }
         }
-        /**
-         * Gets the semantic diagnostics from the program corresponding to this state of file (if provided) or whole program
-         * The semantic diagnostics are cached and managed here
-         * Note that it is assumed that when asked about semantic diagnostics through this API,
-         * the file has been taken out of affected files so it is safe to use cache or get from program and cache the diagnostics
-         * In case of SemanticDiagnosticsBuilderProgram if the source file is not provided,
-         * it will iterate through all the affected files, to ensure that cache stays valid and yet provide a way to get all semantic diagnostics
-         */
         function getSemanticDiagnostics(sourceFile, cancellationToken) {
             assertSourceFileOkWithoutNextAffectedCall(state, sourceFile);
             var compilerOptions = state.program.getCompilerOptions();
             if (compilerOptions.outFile || compilerOptions.out) {
                 ts.Debug.assert(!state.semanticDiagnosticsPerFile);
-                // We dont need to cache the diagnostics just return them from program
                 return state.program.getSemanticDiagnostics(sourceFile, cancellationToken);
             }
             if (sourceFile) {
                 return getSemanticDiagnosticsOfFile(state, sourceFile, cancellationToken);
             }
             if (kind === BuilderProgramKind.SemanticDiagnosticsBuilderProgram) {
-                // When semantic builder asks for diagnostics of the whole program,
-                // ensure that all the affected files are handled
                 var affected = void 0;
                 while (affected = getNextAffectedFile(state, cancellationToken, computeHash)) {
                     doneWithAffectedFile(state, affected);
@@ -83691,7 +67825,6 @@ var ts;
     function createAbstractBuilder(newProgramOrRootNames, hostOrOptions, oldProgramOrHost, configFileParsingDiagnosticsOrOldProgram, configFileParsingDiagnostics) {
         var program = ts.getBuilderCreationParameters(newProgramOrRootNames, hostOrOptions, oldProgramOrHost, configFileParsingDiagnosticsOrOldProgram, configFileParsingDiagnostics).newProgram;
         return {
-            // Only return program, all other methods are not implemented
             getProgram: function () { return program; },
             getState: ts.notImplemented,
             getCompilerOptions: ts.notImplemented,
@@ -83709,7 +67842,6 @@ var ts;
     }
     ts.createAbstractBuilder = createAbstractBuilder;
 })(ts || (ts = {}));
-/*@internal*/
 var ts;
 (function (ts) {
     ts.maxNumberOfFilesToIterateForInvalidation = 256;
@@ -83718,35 +67850,23 @@ var ts;
         var filesWithInvalidatedResolutions;
         var filesWithInvalidatedNonRelativeUnresolvedImports;
         var allFilesHaveInvalidatedResolution = false;
-        var getCurrentDirectory = ts.memoize(function () { return resolutionHost.getCurrentDirectory(); }); // TODO: GH#18217
+        var getCurrentDirectory = ts.memoize(function () { return resolutionHost.getCurrentDirectory(); });
         var cachedDirectoryStructureHost = resolutionHost.getCachedDirectoryStructureHost();
-        // The resolvedModuleNames and resolvedTypeReferenceDirectives are the cache of resolutions per file.
-        // The key in the map is source file's path.
-        // The values are Map of resolutions with key being name lookedup.
         var resolvedModuleNames = ts.createMap();
         var perDirectoryResolvedModuleNames = ts.createMap();
         var nonRelaticeModuleNameCache = ts.createMap();
         var moduleResolutionCache = ts.createModuleResolutionCacheWithMaps(perDirectoryResolvedModuleNames, nonRelaticeModuleNameCache, getCurrentDirectory(), resolutionHost.getCanonicalFileName);
         var resolvedTypeReferenceDirectives = ts.createMap();
         var perDirectoryResolvedTypeReferenceDirectives = ts.createMap();
-        /**
-         * These are the extensions that failed lookup files will have by default,
-         * any other extension of failed lookup will be store that path in custom failed lookup path
-         * This helps in not having to comb through all resolutions when files are added/removed
-         * Note that .d.ts file also has .d.ts extension hence will be part of default extensions
-         */
-        var failedLookupDefaultExtensions = [".ts" /* Ts */, ".tsx" /* Tsx */, ".js" /* Js */, ".jsx" /* Jsx */, ".json" /* Json */];
+        var failedLookupDefaultExtensions = [".ts", ".tsx", ".js", ".jsx", ".json"];
         var customFailedLookupPaths = ts.createMap();
         var directoryWatchesOfFailedLookups = ts.createMap();
         var rootDir = rootDirForResolution && ts.removeTrailingDirectorySeparator(ts.getNormalizedAbsolutePath(rootDirForResolution, getCurrentDirectory()));
-        var rootPath = (rootDir && resolutionHost.toPath(rootDir)); // TODO: GH#18217
-        // TypeRoot watches for the types that get added as part of getAutomaticTypeDirectiveNames
+        var rootPath = (rootDir && resolutionHost.toPath(rootDir));
         var typeRootsWatches = ts.createMap();
         return {
             startRecordingFilesWithChangedResolutions: startRecordingFilesWithChangedResolutions,
             finishRecordingFilesWithChangedResolutions: finishRecordingFilesWithChangedResolutions,
-            // perDirectoryResolvedModuleNames and perDirectoryResolvedTypeReferenceDirectives could be non empty if there was exception during program update
-            // (between startCachingPerDirectoryResolution and finishCachingPerDirectoryResolution)
             startCachingPerDirectoryResolution: clearPerDirectoryResolutions,
             finishCachingPerDirectoryResolution: finishCachingPerDirectoryResolution,
             resolveModuleNames: resolveModuleNames,
@@ -83779,8 +67899,6 @@ var ts;
             resolvedModuleNames.clear();
             resolvedTypeReferenceDirectives.clear();
             allFilesHaveInvalidatedResolution = false;
-            // perDirectoryResolvedModuleNames and perDirectoryResolvedTypeReferenceDirectives could be non empty if there was exception during program update
-            // (between startCachingPerDirectoryResolution and finishCachingPerDirectoryResolution)
             clearPerDirectoryResolutions();
         }
         function startRecordingFilesWithChangedResolutions() {
@@ -83795,13 +67913,11 @@ var ts;
             if (!filesWithInvalidatedNonRelativeUnresolvedImports) {
                 return false;
             }
-            // Invalidated if file has unresolved imports
             var value = filesWithInvalidatedNonRelativeUnresolvedImports.get(path);
             return !!value && !!value.length;
         }
         function createHasInvalidatedResolution(forceAllFilesAsInvalidated) {
             if (allFilesHaveInvalidatedResolution || forceAllFilesAsInvalidated) {
-                // Any file asked would have invalidated resolution
                 filesWithInvalidatedResolutions = undefined;
                 return ts.returnTrue;
             }
@@ -83828,21 +67944,16 @@ var ts;
         }
         function resolveModuleName(moduleName, containingFile, compilerOptions, host) {
             var primaryResult = ts.resolveModuleName(moduleName, containingFile, compilerOptions, host, moduleResolutionCache);
-            // return result immediately only if global cache support is not enabled or if it is .ts, .tsx or .d.ts
             if (!resolutionHost.getGlobalCache) {
                 return primaryResult;
             }
-            // otherwise try to load typings from @types
             var globalCache = resolutionHost.getGlobalCache();
             if (globalCache !== undefined && !ts.isExternalModuleNameRelative(moduleName) && !(primaryResult.resolvedModule && ts.extensionIsTypeScript(primaryResult.resolvedModule.extension))) {
-                // create different collection of failed lookup locations for second pass
-                // if it will fail and we've already found something during the first pass - we don't want to pollute its results
                 var _a = ts.loadModuleFromGlobalCache(moduleName, resolutionHost.projectName, compilerOptions, host, globalCache), resolvedModule = _a.resolvedModule, failedLookupLocations = _a.failedLookupLocations;
                 if (resolvedModule) {
                     return { resolvedModule: resolvedModule, failedLookupLocations: ts.addRange(primaryResult.failedLookupLocations, failedLookupLocations) };
                 }
             }
-            // Default return the result from the first pass
             return primaryResult;
         }
         function resolveNamesWithLocalCache(names, containingFile, cache, perDirectoryCache, loader, getResolutionWithResolvedFileName, reusedNames, logChanges) {
@@ -83861,10 +67972,8 @@ var ts;
             for (var _i = 0, names_2 = names; _i < names_2.length; _i++) {
                 var name = names_2[_i];
                 var resolution = resolutionsInFile.get(name);
-                // Resolution is valid if it is present and not invalidated
                 if (!seenNamesInFile.has(name) &&
                     allFilesHaveInvalidatedResolution || !resolution || resolution.isInvalidated ||
-                    // If the name is unresolved import that was invalidated, recalculate
                     (hasInvalidatedNonRelativeUnresolvedImport && !ts.isExternalModuleNameRelative(name) && !getResolutionWithResolvedFileName(resolution))) {
                     var existingResolution = resolution;
                     var resolutionInDirectory = perDirectoryResolution.get(name);
@@ -83882,15 +67991,13 @@ var ts;
                     }
                     if (logChanges && filesWithChangedSetOfUnresolvedImports && !resolutionIsEqualTo(existingResolution, resolution)) {
                         filesWithChangedSetOfUnresolvedImports.push(path);
-                        // reset log changes to avoid recording the same file multiple times
                         logChanges = false;
                     }
                 }
                 ts.Debug.assert(resolution !== undefined && !resolution.isInvalidated);
                 seenNamesInFile.set(name, true);
-                resolvedModules.push(getResolutionWithResolvedFileName(resolution)); // TODO: GH#18217
+                resolvedModules.push(getResolutionWithResolvedFileName(resolution));
             }
-            // Stop watching and remove the unused name
             resolutionsInFile.forEach(function (resolution, name) {
                 if (!seenNamesInFile.has(name) && !ts.contains(reusedNames, name)) {
                     stopWatchFailedLookupLocationOfResolution(resolution);
@@ -83917,8 +68024,7 @@ var ts;
             }
         }
         function resolveTypeReferenceDirectives(typeDirectiveNames, containingFile) {
-            return resolveNamesWithLocalCache(typeDirectiveNames, containingFile, resolvedTypeReferenceDirectives, perDirectoryResolvedTypeReferenceDirectives, ts.resolveTypeReferenceDirective, getResolvedTypeReferenceDirective, 
-            /*reusedNames*/ undefined, /*logChanges*/ false);
+            return resolveNamesWithLocalCache(typeDirectiveNames, containingFile, resolvedTypeReferenceDirectives, perDirectoryResolvedTypeReferenceDirectives, ts.resolveTypeReferenceDirective, getResolvedTypeReferenceDirective, undefined, false);
         }
         function resolveModuleNames(moduleNames, containingFile, reusedNames) {
             return resolveNamesWithLocalCache(moduleNames, containingFile, resolvedModuleNames, perDirectoryResolvedModuleNames, resolveModuleName, getResolvedModule, reusedNames, logChangesWhenResolvingModule);
@@ -83933,32 +68039,22 @@ var ts;
         function isNodeModulesAtTypesDirectory(dirPath) {
             return ts.endsWith(dirPath, "/node_modules/@types");
         }
-        /**
-         * Filter out paths like
-         * "/", "/user", "/user/username", "/user/username/folderAtRoot",
-         * "c:/", "c:/users", "c:/users/username", "c:/users/username/folderAtRoot", "c:/folderAtRoot"
-         * @param dirPath
-         */
         function canWatchDirectory(dirPath) {
             var rootLength = ts.getRootLength(dirPath);
             if (dirPath.length === rootLength) {
-                // Ignore "/", "c:/"
                 return false;
             }
             var nextDirectorySeparator = dirPath.indexOf(ts.directorySeparator, rootLength);
             if (nextDirectorySeparator === -1) {
-                // ignore "/user", "c:/users" or "c:/folderAtRoot"
                 return false;
             }
-            if (dirPath.charCodeAt(0) !== 47 /* slash */ &&
+            if (dirPath.charCodeAt(0) !== 47 &&
                 dirPath.substr(rootLength, nextDirectorySeparator).search(/users/i) === -1) {
-                // Paths like c:/folderAtRoot/subFolder are allowed
                 return true;
             }
             for (var searchIndex = nextDirectorySeparator + 1, searchLevels = 2; searchLevels > 0; searchLevels--) {
                 searchIndex = dirPath.indexOf(ts.directorySeparator, searchIndex) + 1;
                 if (searchIndex === 0) {
-                    // Folder isnt at expected minimun levels
                     return false;
                 }
             }
@@ -83972,21 +68068,18 @@ var ts;
         }
         function getDirectoryToWatchFailedLookupLocation(failedLookupLocation, failedLookupLocationPath) {
             if (isInDirectoryPath(rootPath, failedLookupLocationPath)) {
-                return { dir: rootDir, dirPath: rootPath }; // TODO: GH#18217
+                return { dir: rootDir, dirPath: rootPath };
             }
             return getDirectoryToWatchFromFailedLookupLocationDirectory(ts.getDirectoryPath(ts.getNormalizedAbsolutePath(failedLookupLocation, getCurrentDirectory())), ts.getDirectoryPath(failedLookupLocationPath));
         }
         function getDirectoryToWatchFromFailedLookupLocationDirectory(dir, dirPath) {
-            // If directory path contains node module, get the most parent node_modules directory for watching
             while (ts.stringContains(dirPath, "/node_modules/")) {
                 dir = ts.getDirectoryPath(dir);
                 dirPath = ts.getDirectoryPath(dirPath);
             }
-            // If the directory is node_modules use it to watch
             if (isNodeModulesDirectory(dirPath)) {
                 return filterFSRootDirectoriesToWatch({ dir: dir, dirPath: dirPath }, ts.getDirectoryPath(dirPath));
             }
-            // Use some ancestor of the root directory
             var subDirectoryPath, subDirectory;
             if (rootPath !== undefined) {
                 while (!isInDirectoryPath(dirPath, rootPath)) {
@@ -84006,7 +68099,6 @@ var ts;
             return ts.fileExtensionIsOneOf(path, failedLookupDefaultExtensions);
         }
         function watchFailedLookupLocationOfResolution(resolution) {
-            // No need to set the resolution refCount
             if (!resolution.failedLookupLocations || !resolution.failedLookupLocations.length) {
                 return;
             }
@@ -84022,8 +68114,6 @@ var ts;
                 var failedLookupLocationPath = resolutionHost.toPath(failedLookupLocation);
                 var _a = getDirectoryToWatchFailedLookupLocation(failedLookupLocation, failedLookupLocationPath), dir = _a.dir, dirPath = _a.dirPath, ignore = _a.ignore;
                 if (!ignore) {
-                    // If the failed lookup location path is not one of the supported extensions,
-                    // store it in the custom path
                     if (!isPathWithDefaultFailedLookupExtension(failedLookupLocationPath)) {
                         var refCount = customFailedLookupPaths.get(failedLookupLocationPath) || 0;
                         customFailedLookupPaths.set(failedLookupLocationPath, refCount + 1);
@@ -84037,7 +68127,7 @@ var ts;
                 }
             }
             if (setAtRoot) {
-                setDirectoryWatcher(rootDir, rootPath); // TODO: GH#18217
+                setDirectoryWatcher(rootDir, rootPath);
             }
         }
         function setDirectoryWatcher(dir, dirPath) {
@@ -84088,23 +68178,20 @@ var ts;
         }
         function removeDirectoryWatcher(dirPath) {
             var dirWatcher = directoryWatchesOfFailedLookups.get(dirPath);
-            // Do not close the watcher yet since it might be needed by other failed lookup locations.
             dirWatcher.refCount--;
         }
         function createDirectoryWatcher(directory, dirPath) {
             return resolutionHost.watchDirectoryOfFailedLookupLocation(directory, function (fileOrDirectory) {
                 var fileOrDirectoryPath = resolutionHost.toPath(fileOrDirectory);
                 if (cachedDirectoryStructureHost) {
-                    // Since the file existence changed, update the sourceFiles cache
                     cachedDirectoryStructureHost.addOrDeleteFileOrDirectory(fileOrDirectory, fileOrDirectoryPath);
                 }
                 if (!allFilesHaveInvalidatedResolution && invalidateResolutionOfFailedLookupLocation(fileOrDirectoryPath, dirPath === fileOrDirectoryPath)) {
                     resolutionHost.onInvalidatedResolution();
                 }
-            }, 1 /* Recursive */);
+            }, 1);
         }
         function removeResolutionsOfFileFromCache(cache, filePath) {
-            // Deleted file, stop watching failed lookups for all the resolutions in the file
             var resolutions = cache.get(filePath);
             if (resolutions) {
                 resolutions.forEach(stopWatchFailedLookupLocationOfResolution);
@@ -84130,7 +68217,6 @@ var ts;
                     }
                     seenInDir.set(name, true);
                     if (!resolution.isInvalidated && isInvalidatedResolution(resolution, getResolutionWithResolvedFileName)) {
-                        // Mark the file as needing re-evaluation of module resolution instead of using it blindly.
                         resolution.isInvalidated = true;
                         (filesWithInvalidatedResolutions || (filesWithInvalidatedResolutions = ts.createMap())).set(containingFilePath, true);
                     }
@@ -84142,8 +68228,6 @@ var ts;
             return resolvedModuleNames.size > maxSize || resolvedTypeReferenceDirectives.size > maxSize;
         }
         function invalidateResolutions(isInvalidatedResolution) {
-            // If more than maxNumberOfFilesToIterateForInvalidation present,
-            // just invalidated all files and recalculate the resolutions for files instead
             if (hasReachedResolutionIterationLimit()) {
                 allFilesHaveInvalidatedResolution = true;
                 return;
@@ -84153,11 +68237,9 @@ var ts;
         }
         function invalidateResolutionOfFile(filePath) {
             removeResolutionsOfFile(filePath);
-            invalidateResolutions(
-            // Resolution is invalidated if the resulting file name is same as the deleted file path
-            function (resolution, getResolutionWithResolvedFileName) {
+            invalidateResolutions(function (resolution, getResolutionWithResolvedFileName) {
                 var result = getResolutionWithResolvedFileName(resolution);
-                return !!result && resolutionHost.toPath(result.resolvedFileName) === filePath; // TODO: GH#18217
+                return !!result && resolutionHost.toPath(result.resolvedFileName) === filePath;
             });
         }
         function setFilesWithInvalidatedNonRelativeUnresolvedImports(filesMap) {
@@ -84167,17 +68249,12 @@ var ts;
         function invalidateResolutionOfFailedLookupLocation(fileOrDirectoryPath, isCreatingWatchedDirectory) {
             var isChangedFailedLookupLocation;
             if (isCreatingWatchedDirectory) {
-                // Watching directory is created
-                // Invalidate any resolution has failed lookup in this directory
                 isChangedFailedLookupLocation = function (location) { return isInDirectoryPath(fileOrDirectoryPath, resolutionHost.toPath(location)); };
             }
             else {
-                // Some file or directory in the watching directory is created
-                // Return early if it does not have any of the watching extension or not the custom failed lookup path
                 var dirOfFileOrDirectory = ts.getDirectoryPath(fileOrDirectoryPath);
                 if (isNodeModulesAtTypesDirectory(fileOrDirectoryPath) || isNodeModulesDirectory(fileOrDirectoryPath) ||
                     isNodeModulesAtTypesDirectory(dirOfFileOrDirectory) || isNodeModulesDirectory(dirOfFileOrDirectory)) {
-                    // Invalidate any resolution from this directory
                     isChangedFailedLookupLocation = function (location) {
                         var locationPath = resolutionHost.toPath(location);
                         return locationPath === fileOrDirectoryPath || ts.startsWith(resolutionHost.toPath(location), fileOrDirectoryPath);
@@ -84187,19 +68264,15 @@ var ts;
                     if (!isPathWithDefaultFailedLookupExtension(fileOrDirectoryPath) && !customFailedLookupPaths.has(fileOrDirectoryPath)) {
                         return false;
                     }
-                    // Ignore emits from the program
                     if (ts.isEmittedFileOfProgram(resolutionHost.getCurrentProgram(), fileOrDirectoryPath)) {
                         return false;
                     }
-                    // Resolution need to be invalidated if failed lookup location is same as the file or directory getting created
                     isChangedFailedLookupLocation = function (location) { return resolutionHost.toPath(location) === fileOrDirectoryPath; };
                 }
             }
             var hasChangedFailedLookupLocation = function (resolution) { return ts.some(resolution.failedLookupLocations, isChangedFailedLookupLocation); };
             var invalidatedFilesCount = filesWithInvalidatedResolutions && filesWithInvalidatedResolutions.size;
-            invalidateResolutions(
-            // Resolution is invalidated if the resulting file name is same as the deleted file path
-            hasChangedFailedLookupLocation);
+            invalidateResolutions(hasChangedFailedLookupLocation);
             return allFilesHaveInvalidatedResolution || filesWithInvalidatedResolutions && filesWithInvalidatedResolutions.size !== invalidatedFilesCount;
         }
         function closeTypeRootsWatch() {
@@ -84216,39 +68289,24 @@ var ts;
             return !ignore && directoryWatchesOfFailedLookups.has(dirPath) ? dirPath : undefined;
         }
         function createTypeRootsWatch(typeRootPath, typeRoot) {
-            // Create new watch and recursive info
             return resolutionHost.watchTypeRootsDirectory(typeRoot, function (fileOrDirectory) {
                 var fileOrDirectoryPath = resolutionHost.toPath(fileOrDirectory);
                 if (cachedDirectoryStructureHost) {
-                    // Since the file existence changed, update the sourceFiles cache
                     cachedDirectoryStructureHost.addOrDeleteFileOrDirectory(fileOrDirectory, fileOrDirectoryPath);
                 }
-                // For now just recompile
-                // We could potentially store more data here about whether it was/would be really be used or not
-                // and with that determine to trigger compilation but for now this is enough
                 resolutionHost.onChangedAutomaticTypeDirectiveNames();
-                // Since directory watchers invoked are flaky, the failed lookup location events might not be triggered
-                // So handle to failed lookup locations here as well to ensure we are invalidating resolutions
                 var dirPath = getDirectoryToWatchFailedLookupLocationFromTypeRoot(typeRoot, typeRootPath);
                 if (dirPath && invalidateResolutionOfFailedLookupLocation(fileOrDirectoryPath, dirPath === fileOrDirectoryPath)) {
                     resolutionHost.onInvalidatedResolution();
                 }
-            }, 1 /* Recursive */);
+            }, 1);
         }
-        /**
-         * Watches the types that would get added as part of getAutomaticTypeDirectiveNames
-         * To be called when compiler options change
-         */
         function updateTypeRootsWatch() {
             var options = resolutionHost.getCompilationSettings();
             if (options.types) {
-                // No need to do any watch since resolution cache is going to handle the failed lookups
-                // for the types added by this
                 closeTypeRootsWatch();
                 return;
             }
-            // we need to assume the directories exist to ensure that we can get all the type root directories that get included
-            // But filter directories that are at root level to say directory doesnt exist, so that we arent watching them
             var typeRoots = ts.getEffectiveTypeRoots(options, { directoryExists: directoryExistsForTypeRootWatch, getCurrentDirectory: getCurrentDirectory });
             if (typeRoots) {
                 ts.mutateMap(typeRootsWatches, ts.arrayToMap(typeRoots, function (tr) { return resolutionHost.toPath(tr); }), {
@@ -84260,11 +68318,6 @@ var ts;
                 closeTypeRootsWatch();
             }
         }
-        /**
-         * Use this function to return if directory exists to get type roots to watch
-         * If we return directory exists then only the paths will be added to type roots
-         * Hence return true for all directories except root directories which are filtered from watching
-         */
         function directoryExistsForTypeRootWatch(nodeTypesDirectory) {
             var dir = ts.getDirectoryPath(ts.getDirectoryPath(nodeTypesDirectory));
             var dirPath = resolutionHost.toPath(dir);
@@ -84273,13 +68326,10 @@ var ts;
     }
     ts.createResolutionCache = createResolutionCache;
 })(ts || (ts = {}));
-// Used by importFixes to synthesize import module specifiers.
-/* @internal */
 var ts;
 (function (ts) {
     var moduleSpecifiers;
     (function (moduleSpecifiers) {
-        // Note: fromSourceFile is just for usesJsExtensionOnImports
         function getModuleSpecifier(compilerOptions, fromSourceFile, fromSourceFileName, toFileName, host, preferences) {
             if (preferences === void 0) { preferences = {}; }
             var info = getInfo(compilerOptions, fromSourceFile, fromSourceFileName, host);
@@ -84287,7 +68337,6 @@ var ts;
                 ts.first(getLocalModuleSpecifiers(toFileName, info, compilerOptions, preferences));
         }
         moduleSpecifiers.getModuleSpecifier = getModuleSpecifier;
-        // For each symlink/original for a module, returns a list of ways to import that file.
         function getModuleSpecifiers(moduleSymbol, program, importingSourceFile, host, preferences) {
             var ambient = tryGetModuleNameFromAmbientModule(moduleSymbol);
             if (ambient)
@@ -84301,7 +68350,6 @@ var ts;
             });
         }
         moduleSpecifiers.getModuleSpecifiers = getModuleSpecifiers;
-        // importingSourceFileName is separate because getEditsForFileRename may need to specify an updated path
         function getInfo(compilerOptions, importingSourceFile, importingSourceFileName, host) {
             var moduleResolutionKind = ts.getEmitModuleResolutionKind(compilerOptions);
             var addJsExtension = usesJsExtensionOnImports(importingSourceFile);
@@ -84341,33 +68389,6 @@ var ts;
             if (isPathRelativeToParent(relativeToBaseUrl)) {
                 return [relativePath];
             }
-            /*
-            Prefer a relative import over a baseUrl import if it doesn't traverse up to baseUrl.
-    
-            Suppose we have:
-                baseUrl = /base
-                sourceDirectory = /base/a/b
-                moduleFileName = /base/foo/bar
-            Then:
-                relativePath = ../../foo/bar
-                getRelativePathNParents(relativePath) = 2
-                pathFromSourceToBaseUrl = ../../
-                getRelativePathNParents(pathFromSourceToBaseUrl) = 2
-                2 < 2 = false
-            In this case we should prefer using the baseUrl path "/a/b" instead of the relative path "../../foo/bar".
-    
-            Suppose we have:
-                baseUrl = /base
-                sourceDirectory = /base/foo/a
-                moduleFileName = /base/foo/bar
-            Then:
-                relativePath = ../a
-                getRelativePathNParents(relativePath) = 1
-                pathFromSourceToBaseUrl = ../../
-                getRelativePathNParents(pathFromSourceToBaseUrl) = 2
-                1 < 2 = true
-            In this case we should prefer using the relative path "../a" instead of the baseUrl path "foo/a".
-            */
             var pathFromSourceToBaseUrl = ts.ensurePathIsNonModuleName(ts.getRelativePathFromDirectory(sourceDirectory, baseUrl, getCanonicalFileName));
             var relativeFirst = getRelativePathNParents(relativePath) < getRelativePathNParents(pathFromSourceToBaseUrl);
             return relativeFirst ? [relativePath, importRelativeToBaseUrl] : [importRelativeToBaseUrl, relativePath];
@@ -84376,13 +68397,9 @@ var ts;
             var imports = _a.imports;
             return ts.firstDefined(imports, function (_a) {
                 var text = _a.text;
-                return ts.pathIsRelative(text) ? ts.fileExtensionIs(text, ".js" /* Js */) : undefined;
+                return ts.pathIsRelative(text) ? ts.fileExtensionIs(text, ".js") : undefined;
             }) || false;
         }
-        /**
-         * Looks for a existing imports that use symlinks to this module.
-         * Only if no symlink is available, the real path will be used.
-         */
         function getAllModulePaths(program, _a) {
             var fileName = _a.fileName;
             var symlinks = ts.mapDefined(program.getSourceFiles(), function (sf) {
@@ -84445,36 +68462,28 @@ var ts;
         function tryGetModuleNameFromTypeRoots(options, host, getCanonicalFileName, moduleFileName, addJsExtension) {
             var roots = ts.getEffectiveTypeRoots(options, host);
             return ts.firstDefined(roots, function (unNormalizedTypeRoot) {
-                var typeRoot = ts.toPath(unNormalizedTypeRoot, /*basePath*/ undefined, getCanonicalFileName);
+                var typeRoot = ts.toPath(unNormalizedTypeRoot, undefined, getCanonicalFileName);
                 if (ts.startsWith(moduleFileName, typeRoot)) {
-                    // For a type definition, we can strip `/index` even with classic resolution.
                     return removeExtensionAndIndexPostFix(moduleFileName.substring(typeRoot.length + 1), ts.ModuleResolutionKind.NodeJs, addJsExtension);
                 }
             });
         }
         function tryGetModuleNameAsNodeModule(options, moduleFileName, host, getCanonicalFileName, sourceDirectory) {
             if (ts.getEmitModuleResolutionKind(options) !== ts.ModuleResolutionKind.NodeJs) {
-                // nothing to do here
                 return undefined;
             }
             var parts = getNodeModulePathParts(moduleFileName);
             if (!parts) {
                 return undefined;
             }
-            // Simplify the full file path to something that can be resolved by Node.
-            // If the module could be imported by a directory name, use that directory's name
             var moduleSpecifier = getDirectoryOrExtensionlessFileName(moduleFileName);
-            // Get a path that's relative to node_modules or the importing file's path
-            // if node_modules folder is in this folder or any of its parent folders, no need to keep it.
             if (!ts.startsWith(sourceDirectory, moduleSpecifier.substring(0, parts.topLevelNodeModulesIndex)))
                 return undefined;
-            // If the module was found in @types, get the actual Node package name
             return ts.getPackageNameFromAtTypesDirectory(moduleSpecifier.substring(parts.topLevelPackageNameIndex + 1));
             function getDirectoryOrExtensionlessFileName(path) {
-                // If the file is the main module, it can be imported by the package name
                 var packageRootPath = path.substring(0, parts.packageRootIndex);
                 var packageJsonPath = ts.combinePaths(packageRootPath, "package.json");
-                if (host.fileExists(packageJsonPath)) { // TODO: GH#18217
+                if (host.fileExists(packageJsonPath)) {
                     var packageJsonContent = JSON.parse(host.readFile(packageJsonPath));
                     if (packageJsonContent) {
                         var mainFileRelative = packageJsonContent.typings || packageJsonContent.types || packageJsonContent.main;
@@ -84486,10 +68495,7 @@ var ts;
                         }
                     }
                 }
-                // We still have a file name - remove the extension
                 var fullModulePathWithoutExtension = ts.removeFileExtension(path);
-                // If the file is /index, it can be imported by its directory name
-                // IFF there is not _also_ a file by the same name
                 if (getCanonicalFileName(fullModulePathWithoutExtension.substring(parts.fileNameIndex)) === "/index" && !tryGetAnyFileFromPath(host, fullModulePathWithoutExtension.substring(0, parts.fileNameIndex))) {
                     return fullModulePathWithoutExtension.substring(0, parts.fileNameIndex);
                 }
@@ -84497,71 +68503,60 @@ var ts;
             }
         }
         function tryGetAnyFileFromPath(host, path) {
-            // We check all js, `node` and `json` extensions in addition to TS, since node module resolution would also choose those over the directory
-            var extensions = ts.getSupportedExtensions({ allowJs: true }, [{ extension: "node", isMixedContent: false }, { extension: "json", isMixedContent: false, scriptKind: 6 /* JSON */ }]);
-            for (var _i = 0, extensions_1 = extensions; _i < extensions_1.length; _i++) {
-                var e = extensions_1[_i];
+            var extensions = ts.getSupportedExtensions({ allowJs: true }, [{ extension: "node", isMixedContent: false }, { extension: "json", isMixedContent: false, scriptKind: 6 }]);
+            for (var _i = 0, extensions_3 = extensions; _i < extensions_3.length; _i++) {
+                var e = extensions_3[_i];
                 var fullPath = path + e;
-                if (host.fileExists(fullPath)) { // TODO: GH#18217
+                if (host.fileExists(fullPath)) {
                     return fullPath;
                 }
             }
         }
         function getNodeModulePathParts(fullPath) {
-            // If fullPath can't be valid module file within node_modules, returns undefined.
-            // Example of expected pattern: /base/path/node_modules/[@scope/otherpackage/@otherscope/node_modules/]package/[subdirectory/]file.js
-            // Returns indices:                       ^            ^                                                      ^             ^
             var topLevelNodeModulesIndex = 0;
             var topLevelPackageNameIndex = 0;
             var packageRootIndex = 0;
             var fileNameIndex = 0;
-            var States;
-            (function (States) {
-                States[States["BeforeNodeModules"] = 0] = "BeforeNodeModules";
-                States[States["NodeModules"] = 1] = "NodeModules";
-                States[States["Scope"] = 2] = "Scope";
-                States[States["PackageContent"] = 3] = "PackageContent";
-            })(States || (States = {}));
             var partStart = 0;
             var partEnd = 0;
-            var state = 0 /* BeforeNodeModules */;
+            var state = 0;
             while (partEnd >= 0) {
                 partStart = partEnd;
                 partEnd = fullPath.indexOf("/", partStart + 1);
                 switch (state) {
-                    case 0 /* BeforeNodeModules */:
+                    case 0:
                         if (fullPath.indexOf("/node_modules/", partStart) === partStart) {
                             topLevelNodeModulesIndex = partStart;
                             topLevelPackageNameIndex = partEnd;
-                            state = 1 /* NodeModules */;
+                            state = 1;
                         }
                         break;
-                    case 1 /* NodeModules */:
-                    case 2 /* Scope */:
-                        if (state === 1 /* NodeModules */ && fullPath.charAt(partStart + 1) === "@") {
-                            state = 2 /* Scope */;
+                    case 1:
+                    case 2:
+                        if (state === 1 && fullPath.charAt(partStart + 1) === "@") {
+                            state = 2;
                         }
                         else {
                             packageRootIndex = partEnd;
-                            state = 3 /* PackageContent */;
+                            state = 3;
                         }
                         break;
-                    case 3 /* PackageContent */:
+                    case 3:
                         if (fullPath.indexOf("/node_modules/", partStart) === partStart) {
-                            state = 1 /* NodeModules */;
+                            state = 1;
                         }
                         else {
-                            state = 3 /* PackageContent */;
+                            state = 3;
                         }
                         break;
                 }
             }
             fileNameIndex = partStart;
-            return state > 1 /* NodeModules */ ? { topLevelNodeModulesIndex: topLevelNodeModulesIndex, topLevelPackageNameIndex: topLevelPackageNameIndex, packageRootIndex: packageRootIndex, fileNameIndex: fileNameIndex } : undefined;
+            return state > 1 ? { topLevelNodeModulesIndex: topLevelNodeModulesIndex, topLevelPackageNameIndex: topLevelPackageNameIndex, packageRootIndex: packageRootIndex, fileNameIndex: fileNameIndex } : undefined;
         }
         function getPathRelativeToRootDirs(path, rootDirs, getCanonicalFileName) {
             return ts.firstDefined(rootDirs, function (rootDir) {
-                var relativePath = getRelativePathIfInDirectory(path, rootDir, getCanonicalFileName); // TODO: GH#18217
+                var relativePath = getRelativePathIfInDirectory(path, rootDir, getCanonicalFileName);
                 return isPathRelativeToParent(relativePath) ? undefined : relativePath;
             });
         }
@@ -84574,7 +68569,7 @@ var ts;
                     : noExtension;
         }
         function getRelativePathIfInDirectory(path, directoryPath, getCanonicalFileName) {
-            var relativePath = ts.getRelativePathToDirectoryOrUrl(directoryPath, path, directoryPath, getCanonicalFileName, /*isAbsolutePathAnUrl*/ false);
+            var relativePath = ts.getRelativePathToDirectoryOrUrl(directoryPath, path, directoryPath, getCanonicalFileName, false);
             return ts.isRootedDiskPath(relativePath) ? undefined : relativePath;
         }
         function isPathRelativeToParent(path) {
@@ -84582,17 +68577,13 @@ var ts;
         }
     })(moduleSpecifiers = ts.moduleSpecifiers || (ts.moduleSpecifiers = {}));
 })(ts || (ts = {}));
-/*@internal*/
 var ts;
 (function (ts) {
     var sysFormatDiagnosticsHost = ts.sys ? {
         getCurrentDirectory: function () { return ts.sys.getCurrentDirectory(); },
         getNewLine: function () { return ts.sys.newLine; },
         getCanonicalFileName: ts.createGetCanonicalFileName(ts.sys.useCaseSensitiveFileNames)
-    } : undefined; // TODO: GH#18217
-    /**
-     * Create a function that reports error by writing to the system and handles the formating of the diagnostic
-     */
+    } : undefined;
     function createDiagnosticReporter(system, pretty) {
         var host = system === ts.sys ? sysFormatDiagnosticsHost : {
             getCurrentDirectory: function () { return system.getCurrentDirectory(); },
@@ -84606,18 +68597,14 @@ var ts;
         return function (diagnostic) {
             diagnostics[0] = diagnostic;
             system.write(ts.formatDiagnosticsWithColorAndContext(diagnostics, host) + host.getNewLine());
-            diagnostics[0] = undefined; // TODO: GH#18217
+            diagnostics[0] = undefined;
         };
     }
     ts.createDiagnosticReporter = createDiagnosticReporter;
-    /** @internal */
     ts.nonClearingMessageCodes = [
         ts.Diagnostics.Found_1_error_Watching_for_file_changes.code,
         ts.Diagnostics.Found_0_errors_Watching_for_file_changes.code
     ];
-    /**
-     * @returns Whether the screen was cleared.
-     */
     function clearScreenIfNotWatchingForFileChanges(system, diagnostic, options) {
         if (system.clearScreen &&
             !options.preserveWatchOutput &&
@@ -84629,7 +68616,6 @@ var ts;
         }
         return false;
     }
-    /** @internal */
     ts.screenStartingMessageCodes = [
         ts.Diagnostics.Starting_compilation_in_watch_mode.code,
         ts.Diagnostics.File_change_detected_Starting_incremental_compilation.code,
@@ -84639,9 +68625,6 @@ var ts;
             ? newLine + newLine
             : newLine;
     }
-    /**
-     * Create a function that reports watch status by writing to the system and handles the formating of the diagnostic
-     */
     function createWatchStatusReporter(system, pretty) {
         return pretty ?
             function (diagnostic, newLine, options) {
@@ -84661,26 +68644,19 @@ var ts;
             };
     }
     ts.createWatchStatusReporter = createWatchStatusReporter;
-    /** Parses config file using System interface */
     function parseConfigFileWithSystem(configFileName, optionsToExtend, system, reportDiagnostic) {
         var host = system;
         host.onUnRecoverableConfigFileDiagnostic = function (diagnostic) { return reportUnrecoverableDiagnostic(ts.sys, reportDiagnostic, diagnostic); };
         var result = ts.getParsedCommandLineOfConfigFile(configFileName, optionsToExtend, host);
-        host.onUnRecoverableConfigFileDiagnostic = undefined; // TODO: GH#18217
+        host.onUnRecoverableConfigFileDiagnostic = undefined;
         return result;
     }
     ts.parseConfigFileWithSystem = parseConfigFileWithSystem;
-    /**
-     * Helper that emit files, report diagnostics and lists emitted and/or source files depending on compiler options
-     */
     function emitFilesAndReportErrors(program, reportDiagnostic, writeFileName, reportSummary) {
-        // First get and report any syntactic errors.
         var diagnostics = program.getConfigFileParsingDiagnostics().slice();
         var configFileParsingDiagnosticsLength = diagnostics.length;
         ts.addRange(diagnostics, program.getSyntacticDiagnostics());
         var reportSemanticDiagnostics = false;
-        // If we didn't have any syntactic errors, then also try getting the global and
-        // semantic errors.
         if (diagnostics.length === configFileParsingDiagnosticsLength) {
             ts.addRange(diagnostics, program.getOptionsDiagnostics());
             ts.addRange(diagnostics, program.getGlobalDiagnostics());
@@ -84688,7 +68664,6 @@ var ts;
                 reportSemanticDiagnostics = true;
             }
         }
-        // Emit and report any errors we ran into.
         var _a = program.emit(), emittedFiles = _a.emittedFiles, emitSkipped = _a.emitSkipped, emitDiagnostics = _a.diagnostics;
         ts.addRange(diagnostics, emitDiagnostics);
         if (reportSemanticDiagnostics) {
@@ -84711,21 +68686,15 @@ var ts;
             reportSummary(diagnostics.filter(function (diagnostic) { return diagnostic.category === ts.DiagnosticCategory.Error; }).length);
         }
         if (emitSkipped && diagnostics.length > 0) {
-            // If the emitter didn't emit anything, then pass that value along.
             return ts.ExitStatus.DiagnosticsPresent_OutputsSkipped;
         }
         else if (diagnostics.length > 0) {
-            // The emitter emitted something, inform the caller if that happened in the presence
-            // of diagnostics or not.
             return ts.ExitStatus.DiagnosticsPresent_OutputsGenerated;
         }
         return ts.ExitStatus.Success;
     }
     ts.emitFilesAndReportErrors = emitFilesAndReportErrors;
     var noopFileWatcher = { close: ts.noop };
-    /**
-     * Creates the watch compiler host that can be extended with config file or root file names and options host
-     */
     function createWatchCompilerHost(system, createProgram, reportDiagnostic, reportWatchStatus) {
         if (system === void 0) { system = ts.sys; }
         if (!createProgram) {
@@ -84785,16 +68754,10 @@ var ts;
             emitFilesAndReportErrors(builderProgram, reportDiagnostic, writeFileName, reportSummary);
         }
     }
-    /**
-     * Report error and exit
-     */
     function reportUnrecoverableDiagnostic(system, reportDiagnostic, diagnostic) {
         reportDiagnostic(diagnostic);
         system.exit(ts.ExitStatus.DiagnosticsPresent_OutputsSkipped);
     }
-    /**
-     * Creates the watch compiler host from system for config file in watch mode
-     */
     function createWatchCompilerHostOfConfigFile(configFileName, optionsToExtend, system, createProgram, reportDiagnostic, reportWatchStatus) {
         var diagnosticReporter = reportDiagnostic || createDiagnosticReporter(system);
         var host = createWatchCompilerHost(system, createProgram, diagnosticReporter, reportWatchStatus);
@@ -84804,9 +68767,6 @@ var ts;
         return host;
     }
     ts.createWatchCompilerHostOfConfigFile = createWatchCompilerHostOfConfigFile;
-    /**
-     * Creates the watch compiler host from system for compiling root files and options in watch mode
-     */
     function createWatchCompilerHostOfFilesAndCompilerOptions(rootFiles, options, system, createProgram, reportDiagnostic, reportWatchStatus) {
         var host = createWatchCompilerHost(system, createProgram, reportDiagnostic || createDiagnosticReporter(system), reportWatchStatus);
         host.rootFiles = rootFiles;
@@ -84818,7 +68778,7 @@ var ts;
 (function (ts) {
     function createWatchCompilerHost(rootFilesOrConfigFileName, options, system, createProgram, reportDiagnostic, reportWatchStatus) {
         if (ts.isArray(rootFilesOrConfigFileName)) {
-            return ts.createWatchCompilerHostOfFilesAndCompilerOptions(rootFilesOrConfigFileName, options, system, createProgram, reportDiagnostic, reportWatchStatus); // TODO: GH#18217
+            return ts.createWatchCompilerHostOfFilesAndCompilerOptions(rootFilesOrConfigFileName, options, system, createProgram, reportDiagnostic, reportWatchStatus);
         }
         else {
             return ts.createWatchCompilerHostOfConfigFile(rootFilesOrConfigFileName, options, system, createProgram, reportDiagnostic, reportWatchStatus);
@@ -84828,14 +68788,14 @@ var ts;
     var initialVersion = 1;
     function createWatchProgram(host) {
         var builderProgram;
-        var reloadLevel; // level to indicate if the program needs to be reloaded from config file/just filenames etc
-        var missingFilesMap; // Map of file watchers for the missing files
-        var watchedWildcardDirectories; // map of watchers for the wild card directories in the config file
-        var timerToUpdateProgram; // timer callback to recompile the program
-        var sourceFilesCache = ts.createMap(); // Cache that stores the source file and version info
-        var missingFilePathsRequestedForRelease; // These paths are held temparirly so that we can remove the entry from source file cache if the file is not tracked by missing files
-        var hasChangedCompilerOptions = false; // True if the compiler options have changed between compilations
-        var hasChangedAutomaticTypeDirectiveNames = false; // True if the automatic type directives have changed
+        var reloadLevel;
+        var missingFilesMap;
+        var watchedWildcardDirectories;
+        var timerToUpdateProgram;
+        var sourceFilesCache = ts.createMap();
+        var missingFilePathsRequestedForRelease;
+        var hasChangedCompilerOptions = false;
+        var hasChangedAutomaticTypeDirectiveNames = false;
         var useCaseSensitiveFileNames = host.useCaseSensitiveFileNames();
         var currentDirectory = host.getCurrentDirectory();
         var getCurrentDirectory = function () { return currentDirectory; };
@@ -84858,7 +68818,6 @@ var ts;
             getCurrentDirectory: getCurrentDirectory,
             onUnRecoverableConfigFileDiagnostic: host.onUnRecoverableConfigFileDiagnostic
         };
-        // From tsc we want to get already parsed result and hence check for rootFileNames
         var newLine = updateNewLine();
         reportWatchDiagnostic(ts.Diagnostics.Starting_compilation_in_watch_mode);
         if (configFileName) {
@@ -84875,7 +68834,7 @@ var ts;
         var trace = host.trace && (function (s) { host.trace(s + newLine); });
         var watchLogLevel = trace ? compilerOptions.extendedDiagnostics ? ts.WatchLogLevel.Verbose :
             compilerOptions.diagnostis ? ts.WatchLogLevel.TriggerOnly : ts.WatchLogLevel.None : ts.WatchLogLevel.None;
-        var writeLog = watchLogLevel !== ts.WatchLogLevel.None ? trace : ts.noop; // TODO: GH#18217
+        var writeLog = watchLogLevel !== ts.WatchLogLevel.None ? trace : ts.noop;
         var _b = ts.getWatchFactory(watchLogLevel, writeLog), watchFile = _b.watchFile, watchFilePath = _b.watchFilePath, watchDirectory = _b.watchDirectory;
         var getCanonicalFileName = ts.createGetCanonicalFileName(useCaseSensitiveFileNames);
         writeLog("Current directory: " + currentDirectory + " CaseSensitiveFileNames: " + useCaseSensitiveFileNames);
@@ -84883,7 +68842,6 @@ var ts;
             watchFile(host, configFileName, scheduleProgramReload, ts.PollingInterval.High, "Config file");
         }
         var compilerHost = {
-            // Members for CompilerHost
             getSourceFile: function (fileName, languageVersion, onError, shouldCreateNewSourceFile) { return getVersionedSourceFileByPath(fileName, toPath(fileName), languageVersion, onError, shouldCreateNewSourceFile); },
             getSourceFileByPath: getVersionedSourceFileByPath,
             getDefaultLibLocation: host.getDefaultLibLocation && (function () { return host.getDefaultLibLocation(); }),
@@ -84902,7 +68860,6 @@ var ts;
             getEnvironmentVariable: host.getEnvironmentVariable ? (function (name) { return host.getEnvironmentVariable(name); }) : (function () { return ""; }),
             onReleaseOldSourceFile: onReleaseOldSourceFile,
             createHash: host.createHash && (function (data) { return host.createHash(data); }),
-            // Members for ResolutionCacheHost
             toPath: toPath,
             getCompilationSettings: function () { return compilerOptions; },
             watchDirectoryOfFailedLookupLocation: function (dir, cb, flags) { return watchDirectory(host, dir, cb, flags, "Failed Lookup Locations"); },
@@ -84917,12 +68874,9 @@ var ts;
             getCurrentProgram: getCurrentProgram,
             writeLog: writeLog
         };
-        // Cache for the module resolution
         var resolutionCache = ts.createResolutionCache(compilerHost, configFileName ?
             ts.getDirectoryPath(ts.getNormalizedAbsolutePath(configFileName, currentDirectory)) :
-            currentDirectory, 
-        /*logChangesWhenResolvingModule*/ false);
-        // Resolve module using host module resolution strategy if provided otherwise use resolution cache to resolve module names
+            currentDirectory, false);
         compilerHost.resolveModuleNames = host.resolveModuleNames ?
             (function (moduleNames, containingFile, reusedNames) { return host.resolveModuleNames(moduleNames, containingFile, reusedNames); }) :
             (function (moduleNames, containingFile, reusedNames) { return resolutionCache.resolveModuleNames(moduleNames, containingFile, reusedNames); });
@@ -84931,7 +68885,6 @@ var ts;
             (function (typeDirectiveNames, containingFile) { return resolutionCache.resolveTypeReferenceDirectives(typeDirectiveNames, containingFile); });
         var userProvidedResolution = !!host.resolveModuleNames || !!host.resolveTypeReferenceDirectives;
         synchronizeProgram();
-        // Update the wild card directory watch
         watchConfigFileWildCardDirectories();
         return configFileName ?
             { getCurrentProgram: getCurrentBuilderProgram, getProgram: synchronizeProgram } :
@@ -84951,11 +68904,10 @@ var ts;
                     resolutionCache.clear();
                 }
             }
-            // All resolutions are invalid if user provided resolutions
             var hasInvalidatedResolution = resolutionCache.createHasInvalidatedResolution(userProvidedResolution);
             if (ts.isProgramUptoDate(getCurrentProgram(), rootFileNames, compilerOptions, getSourceVersion, fileExists, hasInvalidatedResolution, hasChangedAutomaticTypeDirectiveNames)) {
                 if (hasChangedConfigFileParsingErrors) {
-                    builderProgram = createProgram(/*rootNames*/ undefined, /*options*/ undefined, compilerHost, builderProgram, configFileParsingDiagnostics);
+                    builderProgram = createProgram(undefined, undefined, compilerHost, builderProgram, configFileParsingDiagnostics);
                     hasChangedConfigFileParsingErrors = false;
                 }
             }
@@ -84968,7 +68920,6 @@ var ts;
             return builderProgram;
         }
         function createNewProgram(program, hasInvalidatedResolution) {
-            // Compile the program
             if (watchLogLevel !== ts.WatchLogLevel.None) {
                 writeLog("CreatingProgramWith::");
                 writeLog("  roots: " + JSON.stringify(rootFileNames));
@@ -84982,17 +68933,11 @@ var ts;
             compilerHost.hasChangedAutomaticTypeDirectiveNames = hasChangedAutomaticTypeDirectiveNames;
             builderProgram = createProgram(rootFileNames, compilerOptions, compilerHost, builderProgram, configFileParsingDiagnostics);
             resolutionCache.finishCachingPerDirectoryResolution();
-            // Update watches
             ts.updateMissingFilePathsWatch(builderProgram.getProgram(), missingFilesMap || (missingFilesMap = ts.createMap()), watchMissingFilePath);
             if (needsUpdateInTypeRootWatch) {
                 resolutionCache.updateTypeRootsWatch();
             }
             if (missingFilePathsRequestedForRelease) {
-                // These are the paths that program creater told us as not in use any more but were missing on the disk.
-                // We didnt remove the entry for them from sourceFiles cache so that we dont have to do File IO,
-                // if there is already watcher for it (for missing files)
-                // At this point our watches were updated, hence now we know that these paths are not tracked and need to be removed
-                // so that at later time we have correct result of their presence
                 for (var _i = 0, missingFilePathsRequestedForRelease_1 = missingFilePathsRequestedForRelease; _i < missingFilePathsRequestedForRelease_1.length; _i++) {
                     var missingFilePath = missingFilePathsRequestedForRelease_1[_i];
                     if (!missingFilesMap.has(missingFilePath)) {
@@ -85021,8 +68966,6 @@ var ts;
         }
         function fileExists(fileName) {
             var path = toPath(fileName);
-            // If file is missing on host from cache, we can definitely say file doesnt exist
-            // otherwise we need to ensure from the disk
             if (isFileMissingOnHost(sourceFilesCache.get(path))) {
                 return true;
             }
@@ -85030,11 +68973,9 @@ var ts;
         }
         function getVersionedSourceFileByPath(fileName, path, languageVersion, onError, shouldCreateNewSourceFile) {
             var hostSourceFile = sourceFilesCache.get(path);
-            // No source file on the host
             if (isFileMissingOnHost(hostSourceFile)) {
                 return undefined;
             }
-            // Create new source file if requested or the versions dont match
             if (!hostSourceFile || shouldCreateNewSourceFile || !isFilePresentOnHost(hostSourceFile) || hostSourceFile.version.toString() !== hostSourceFile.sourceFile.version) {
                 var sourceFile = getNewSourceFile();
                 if (hostSourceFile) {
@@ -85042,7 +68983,6 @@ var ts;
                         hostSourceFile.version++;
                     }
                     if (sourceFile) {
-                        // Set the source file and create file watcher now that file was present on the disk
                         hostSourceFile.sourceFile = sourceFile;
                         sourceFile.version = hostSourceFile.version.toString();
                         if (!hostSourceFile.fileWatcher) {
@@ -85050,7 +68990,6 @@ var ts;
                         }
                     }
                     else {
-                        // There is no source file on host any more, close the watch, missing file paths will track it
                         if (isFilePresentOnHost(hostSourceFile)) {
                             hostSourceFile.fileWatcher.close();
                         }
@@ -85090,7 +69029,6 @@ var ts;
             var hostSourceFile = sourceFilesCache.get(path);
             if (hostSourceFile !== undefined) {
                 if (isFileMissingOnHost(hostSourceFile)) {
-                    // The next version, lets set it as presence unknown file
                     sourceFilesCache.set(path, { version: Number(hostSourceFile) + 1 });
                 }
                 else {
@@ -85104,12 +69042,7 @@ var ts;
         }
         function onReleaseOldSourceFile(oldSourceFile, _oldOptions) {
             var hostSourceFileInfo = sourceFilesCache.get(oldSourceFile.path);
-            // If this is the source file thats in the cache and new program doesnt need it,
-            // remove the cached entry.
-            // Note we arent deleting entry if file became missing in new program or
-            // there was version update and new source file was created.
             if (hostSourceFileInfo) {
-                // record the missing file paths so they can be removed later if watchers arent tracking them
                 if (isFileMissingOnHost(hostSourceFileInfo)) {
                     (missingFilePathsRequestedForRelease || (missingFilePathsRequestedForRelease = [])).push(oldSourceFile.path);
                 }
@@ -85127,9 +69060,6 @@ var ts;
                 host.onWatchStatusChange(ts.createCompilerDiagnostic(message), newLine, compilerOptions || optionsToExtendForConfigFile);
             }
         }
-        // Upon detecting a file change, wait for 250ms and then perform a recompilation. This gives batch
-        // operations (such as saving all modified files in an editor) a chance to complete before we kick
-        // off a new compilation.
         function scheduleProgramUpdate() {
             if (!host.setTimeout || !host.clearTimeout) {
                 return;
@@ -85170,7 +69100,6 @@ var ts;
                 hasChangedConfigFileParsingErrors = true;
             }
             rootFileNames = result.fileNames;
-            // Update the program
             synchronizeProgram();
         }
         function reloadConfigFile() {
@@ -85182,27 +69111,24 @@ var ts;
             parseConfigFile();
             hasChangedCompilerOptions = true;
             synchronizeProgram();
-            // Update the wild card directory watch
             watchConfigFileWildCardDirectories();
         }
         function parseConfigFile() {
-            setConfigFileParsingResult(ts.getParsedCommandLineOfConfigFile(configFileName, optionsToExtendForConfigFile, parseConfigFileHost)); // TODO: GH#18217
+            setConfigFileParsingResult(ts.getParsedCommandLineOfConfigFile(configFileName, optionsToExtendForConfigFile, parseConfigFileHost));
         }
         function setConfigFileParsingResult(configFileParseResult) {
             rootFileNames = configFileParseResult.fileNames;
             compilerOptions = configFileParseResult.options;
-            configFileSpecs = configFileParseResult.configFileSpecs; // TODO: GH#18217
+            configFileSpecs = configFileParseResult.configFileSpecs;
             configFileParsingDiagnostics = ts.getConfigFileParsingDiagnostics(configFileParseResult);
             hasChangedConfigFileParsingErrors = true;
         }
         function onSourceFileChange(fileName, eventKind, path) {
             updateCachedSystemWithFile(fileName, path, eventKind);
-            // Update the source file cache
             if (eventKind === ts.FileWatcherEventKind.Deleted && sourceFilesCache.get(path)) {
                 resolutionCache.invalidateResolutionOfFile(path);
             }
             nextSourceFileVersion(path);
-            // Update the program
             scheduleProgramUpdate();
         }
         function updateCachedSystemWithFile(fileName, path, eventKind) {
@@ -85218,9 +69144,7 @@ var ts;
             if (eventKind === ts.FileWatcherEventKind.Created && missingFilesMap.has(missingFilePath)) {
                 missingFilesMap.get(missingFilePath).close();
                 missingFilesMap.delete(missingFilePath);
-                // Delete the entry in the source files cache so that new source file is created
                 nextSourceFileVersion(missingFilePath);
-                // When a missing file is created, we should update the graph.
                 scheduleProgramUpdate();
             }
         }
@@ -85236,21 +69160,16 @@ var ts;
             return watchDirectory(host, directory, function (fileOrDirectory) {
                 ts.Debug.assert(!!configFileName);
                 var fileOrDirectoryPath = toPath(fileOrDirectory);
-                // Since the file existance changed, update the sourceFiles cache
                 if (cachedDirectoryStructureHost) {
                     cachedDirectoryStructureHost.addOrDeleteFileOrDirectory(fileOrDirectory, fileOrDirectoryPath);
                 }
                 nextSourceFileVersion(fileOrDirectoryPath);
-                // If the the added or created file or directory is not supported file name, ignore the file
-                // But when watched directory is added/removed, we need to reload the file list
                 if (fileOrDirectoryPath !== directory && ts.hasExtension(fileOrDirectoryPath) && !ts.isSupportedSourceFileName(fileOrDirectory, compilerOptions)) {
                     writeLog("Project: " + configFileName + " Detected file add/remove of non supported extension: " + fileOrDirectory);
                     return;
                 }
-                // Reload is pending, do the reload
                 if (reloadLevel !== ts.ConfigFileProgramReloadLevel.Full) {
                     reloadLevel = ts.ConfigFileProgramReloadLevel.Partial;
-                    // Schedule Update the program
                     scheduleProgramUpdate();
                 }
             }, flags, "Wild card directories");
@@ -85286,14 +69205,7 @@ var ts;
     var BuildResultFlags;
     (function (BuildResultFlags) {
         BuildResultFlags[BuildResultFlags["None"] = 0] = "None";
-        /**
-         * No errors of any kind occurred during build
-         */
         BuildResultFlags[BuildResultFlags["Success"] = 1] = "Success";
-        /**
-         * None of the .d.ts files emitted by this build were
-         * different from the existing files on disk
-         */
         BuildResultFlags[BuildResultFlags["DeclarationOutputUnchanged"] = 2] = "DeclarationOutputUnchanged";
         BuildResultFlags[BuildResultFlags["ConfigFileErrors"] = 4] = "ConfigFileErrors";
         BuildResultFlags[BuildResultFlags["SyntaxErrors"] = 8] = "SyntaxErrors";
@@ -85305,27 +69217,15 @@ var ts;
     (function (UpToDateStatusType) {
         UpToDateStatusType[UpToDateStatusType["Unbuildable"] = 0] = "Unbuildable";
         UpToDateStatusType[UpToDateStatusType["UpToDate"] = 1] = "UpToDate";
-        /**
-         * The project appears out of date because its upstream inputs are newer than its outputs,
-         * but all of its outputs are actually newer than the previous identical outputs of its (.d.ts) inputs.
-         * This means we can Pseudo-build (just touch timestamps), as if we had actually built this project.
-         */
         UpToDateStatusType[UpToDateStatusType["UpToDateWithUpstreamTypes"] = 2] = "UpToDateWithUpstreamTypes";
         UpToDateStatusType[UpToDateStatusType["OutputMissing"] = 3] = "OutputMissing";
         UpToDateStatusType[UpToDateStatusType["OutOfDateWithSelf"] = 4] = "OutOfDateWithSelf";
         UpToDateStatusType[UpToDateStatusType["OutOfDateWithUpstream"] = 5] = "OutOfDateWithUpstream";
         UpToDateStatusType[UpToDateStatusType["UpstreamOutOfDate"] = 6] = "UpstreamOutOfDate";
         UpToDateStatusType[UpToDateStatusType["UpstreamBlocked"] = 7] = "UpstreamBlocked";
-        /**
-         * Projects with no outputs (i.e. "solution" files)
-         */
         UpToDateStatusType[UpToDateStatusType["ContainerOnly"] = 8] = "ContainerOnly";
     })(UpToDateStatusType = ts.UpToDateStatusType || (ts.UpToDateStatusType = {}));
-    /**
-     * A FileMap maintains a normalized-key to value relationship
-     */
     function createFileMap() {
-        // tslint:disable-next-line:no-null-keyword
         var lookup = ts.createMap();
         return {
             setValue: setValue,
@@ -85398,16 +69298,15 @@ var ts;
             getKeys: getKeys
         };
     }
-    ts.createDependencyMapper = createDependencyMapper;
     function getOutputDeclarationFileName(inputFileName, configFile) {
-        var relativePath = ts.getRelativePathFromDirectory(rootDirOfOptions(configFile.options, configFile.options.configFilePath), inputFileName, /*ignoreCase*/ true);
+        var relativePath = ts.getRelativePathFromDirectory(rootDirOfOptions(configFile.options, configFile.options.configFilePath), inputFileName, true);
         var outputPath = ts.resolvePath(configFile.options.declarationDir || configFile.options.outDir || ts.getDirectoryPath(configFile.options.configFilePath), relativePath);
-        return ts.changeExtension(outputPath, ".d.ts" /* Dts */);
+        return ts.changeExtension(outputPath, ".d.ts");
     }
     function getOutputJavaScriptFileName(inputFileName, configFile) {
-        var relativePath = ts.getRelativePathFromDirectory(rootDirOfOptions(configFile.options, configFile.options.configFilePath), inputFileName, /*ignoreCase*/ true);
+        var relativePath = ts.getRelativePathFromDirectory(rootDirOfOptions(configFile.options, configFile.options.configFilePath), inputFileName, true);
         var outputPath = ts.resolvePath(configFile.options.outDir || ts.getDirectoryPath(configFile.options.configFilePath), relativePath);
-        return ts.changeExtension(outputPath, (ts.fileExtensionIs(inputFileName, ".tsx" /* Tsx */) && configFile.options.jsx === 1 /* Preserve */) ? ".jsx" /* Jsx */ : ".js" /* Js */);
+        return ts.changeExtension(outputPath, (ts.fileExtensionIs(inputFileName, ".tsx") && configFile.options.jsx === 1) ? ".jsx" : ".js");
     }
     function getOutputFileNames(inputFileName, configFile) {
         if (configFile.options.outFile) {
@@ -85430,7 +69329,7 @@ var ts;
         var outputs = [];
         outputs.push(project.options.outFile);
         if (project.options.declaration) {
-            var dts = ts.changeExtension(project.options.outFile, ".d.ts" /* Dts */);
+            var dts = ts.changeExtension(project.options.outFile, ".d.ts");
             outputs.push(dts);
             if (project.options.declarationMap) {
                 outputs.push(dts + ".map");
@@ -85445,7 +69344,7 @@ var ts;
         var cache = createFileMap();
         var configParseHost = ts.parseConfigHostFromCompilerHost(host);
         function parseConfigFile(configFilePath) {
-            var sourceFile = host.getSourceFile(configFilePath, 100 /* JSON */);
+            var sourceFile = host.getSourceFile(configFilePath, 100);
             if (sourceFile === undefined) {
                 return undefined;
             }
@@ -85466,7 +69365,7 @@ var ts;
         return date2 > date1 ? date2 : date1;
     }
     function isDeclarationFile(fileName) {
-        return ts.fileExtensionIs(fileName, ".d.ts" /* Dts */);
+        return ts.fileExtensionIs(fileName, ".d.ts");
     }
     function createBuildContext(options) {
         var invalidatedProjects = createFileMap();
@@ -85524,8 +69423,8 @@ var ts;
         var clean = false;
         var watch = false;
         var projects = [];
-        for (var _i = 0, args_3 = args; _i < args_3.length; _i++) {
-            var arg = args_3[_i];
+        for (var _i = 0, args_6 = args; _i < args_6.length; _i++) {
+            var arg = args_6[_i];
             switch (arg.toLowerCase()) {
                 case "-v":
                 case "--verbose":
@@ -85549,38 +69448,39 @@ var ts;
                 case "--?":
                 case "-?":
                 case "--help":
-                    return ts.printHelp(buildOpts, "--build ");
+                    ts.printHelp(buildOpts, "--build ");
+                    return ts.ExitStatus.Success;
             }
-            // Not a flag, parse as filename
             addProject(arg);
         }
-        // Nonsensical combinations
         if (clean && force) {
-            return buildHost.error(ts.Diagnostics.Options_0_and_1_cannot_be_combined, "clean", "force");
+            buildHost.error(ts.Diagnostics.Options_0_and_1_cannot_be_combined, "clean", "force");
+            return ts.ExitStatus.DiagnosticsPresent_OutputsSkipped;
         }
         if (clean && verbose) {
-            return buildHost.error(ts.Diagnostics.Options_0_and_1_cannot_be_combined, "clean", "verbose");
+            buildHost.error(ts.Diagnostics.Options_0_and_1_cannot_be_combined, "clean", "verbose");
+            return ts.ExitStatus.DiagnosticsPresent_OutputsSkipped;
         }
         if (clean && watch) {
-            return buildHost.error(ts.Diagnostics.Options_0_and_1_cannot_be_combined, "clean", "watch");
+            buildHost.error(ts.Diagnostics.Options_0_and_1_cannot_be_combined, "clean", "watch");
+            return ts.ExitStatus.DiagnosticsPresent_OutputsSkipped;
         }
         if (watch && dry) {
-            return buildHost.error(ts.Diagnostics.Options_0_and_1_cannot_be_combined, "watch", "dry");
+            buildHost.error(ts.Diagnostics.Options_0_and_1_cannot_be_combined, "watch", "dry");
+            return ts.ExitStatus.DiagnosticsPresent_OutputsSkipped;
         }
         if (projects.length === 0) {
-            // tsc -b invoked with no extra arguments; act as if invoked with "tsc -b ."
             addProject(".");
         }
         var builder = createSolutionBuilder(compilerHost, buildHost, projects, { dry: dry, force: force, verbose: verbose }, system);
         if (clean) {
-            builder.cleanAllProjects();
-        }
-        else {
-            builder.buildAllProjects();
+            return builder.cleanAllProjects();
         }
         if (watch) {
-            return builder.startWatching();
+            builder.startWatching();
+            return undefined;
         }
+        return builder.buildAllProjects();
         function addProject(projectSpecification) {
             var fileName = ts.resolvePath(compilerHost.getCurrentDirectory(), projectSpecification);
             var refPath = ts.resolveProjectReferencePath(compilerHost, { path: fileName });
@@ -85594,10 +69494,6 @@ var ts;
         }
     }
     ts.performBuild = performBuild;
-    /**
-     * A SolutionBuilder has an immutable set of rootNames that are the "entry point" projects, but
-     * can dynamically add/remove other projects based on changes on the rootNames' references
-     */
     function createSolutionBuilder(compilerHost, buildHost, rootNames, defaultOptions, system) {
         if (!compilerHost.getModifiedTime || !compilerHost.setModifiedTime) {
             throw new Error("Host must support timestamp APIs");
@@ -85625,26 +69521,22 @@ var ts;
                 throw new Error("System host must support watchFile / watchDirectory / setTimeout if using --watch");
             var graph = getGlobalDependencyGraph();
             if (!graph.buildQueue) {
-                // Everything is broken - we don't even know what to watch. Give up.
                 return;
             }
-            var _loop_9 = function (resolved) {
+            var _loop_12 = function (resolved) {
                 var cfg = configFileCache.parseConfigFile(resolved);
                 if (cfg) {
-                    // Watch this file
                     system.watchFile(resolved, function () {
                         configFileCache.removeKey(resolved);
                         invalidateProjectAndScheduleBuilds(resolved);
                     });
-                    // Update watchers for wildcard directories
                     if (cfg.configFileSpecs) {
                         ts.updateWatchingWildcardDirectories(existingWatchersForWildcards, ts.createMapFromTemplate(cfg.configFileSpecs.wildcardDirectories), function (dir, flags) {
                             return system.watchDirectory(dir, function () {
                                 invalidateProjectAndScheduleBuilds(resolved);
-                            }, !!(flags & 1 /* Recursive */));
+                            }, !!(flags & 1));
                         });
                     }
-                    // Watch input files
                     for (var _i = 0, _a = cfg.fileNames; _i < _a.length; _i++) {
                         var input = _a[_i];
                         system.watchFile(input, function () {
@@ -85655,7 +69547,7 @@ var ts;
             };
             for (var _i = 0, _a = graph.buildQueue; _i < _a.length; _i++) {
                 var resolved = _a[_i];
-                _loop_9(resolved);
+                _loop_12(resolved);
             }
             function invalidateProjectAndScheduleBuilds(resolved) {
                 invalidateProject(resolved);
@@ -85694,10 +69586,6 @@ var ts;
         function invalidateProject(configFileName) {
             var resolved = resolveProjectName(configFileName);
             if (resolved === undefined) {
-                // If this was a rootName, we need to track it as missing.
-                // Otherwise we can just ignore it and have it possibly surface as an error in any downstream projects,
-                // if they exist
-                // TODO: do those things
                 return;
             }
             configFileCache.removeKey(resolved);
@@ -85707,13 +69595,11 @@ var ts;
             if (graph) {
                 queueBuildForDownstreamReferences(resolved);
             }
-            // Mark all downstream projects of this one needing to be built "later"
             function queueBuildForDownstreamReferences(root) {
                 debugger;
                 var deps = graph.dependencyMap.getReferencesTo(root);
                 for (var _i = 0, deps_1 = deps; _i < deps_1.length; _i++) {
                     var ref = deps_1[_i];
-                    // Can skip circular references
                     if (!context.queuedProjects.hasKey(ref)) {
                         context.queuedProjects.setValue(ref, true);
                         queueBuildForDownstreamReferences(ref);
@@ -85738,10 +69624,10 @@ var ts;
                     continue;
                 var resolved = resolveProjectName(next);
                 if (!resolved)
-                    continue; // ??
+                    continue;
                 var proj = configFileCache.parseConfigFile(resolved);
                 if (!proj)
-                    continue; // ?
+                    continue;
                 var status = getUpToDateStatus(proj);
                 verboseReportProjectStatus(next, status);
                 if (status.type === UpToDateStatusType.UpstreamBlocked) {
@@ -85768,7 +69654,6 @@ var ts;
         function getUpToDateStatusWorker(project) {
             var newestInputFileName = undefined;
             var newestInputFileTime = minimumDate;
-            // Get timestamps of input files
             for (var _i = 0, _a = project.fileNames; _i < _a.length; _i++) {
                 var inputFile = _a[_i];
                 if (!compilerHost.fileExists(inputFile)) {
@@ -85783,14 +69668,12 @@ var ts;
                     newestInputFileTime = inputTime;
                 }
             }
-            // Collect the expected outputs of this project
             var outputs = getAllProjectOutputs(project);
             if (outputs.length === 0) {
                 return {
                     type: UpToDateStatusType.ContainerOnly
                 };
             }
-            // Now see if all outputs are newer than the newest input
             var oldestOutputFileName = "(none)";
             var oldestOutputFileTime = maximumDate;
             var newestOutputFileName = "(none)";
@@ -85800,8 +69683,6 @@ var ts;
             var isOutOfDateWithInputs = false;
             for (var _b = 0, outputs_1 = outputs; _b < outputs_1.length; _b++) {
                 var output = outputs_1[_b];
-                // Output is missing; can stop checking
-                // Don't immediately return because we can still be upstream-blocked, which is a higher-priority status
                 if (!compilerHost.fileExists(output)) {
                     missingOutputFileName = output;
                     break;
@@ -85811,8 +69692,6 @@ var ts;
                     oldestOutputFileTime = outputTime;
                     oldestOutputFileName = output;
                 }
-                // If an output is older than the newest input, we can stop checking
-                // Don't immediately return because we can still be upstream-blocked, which is a higher-priority status
                 if (outputTime < newestInputFileTime) {
                     isOutOfDateWithInputs = true;
                     break;
@@ -85821,10 +69700,6 @@ var ts;
                     newestOutputFileTime = outputTime;
                     newestOutputFileName = output;
                 }
-                // Keep track of when the most recent time a .d.ts file was changed.
-                // In addition to file timestamps, we also keep track of when a .d.ts file
-                // had its file touched but not had its contents changed - this allows us
-                // to skip a downstream typecheck
                 if (isDeclarationFile(output)) {
                     var unchangedTime = context.unchangedOutputs.getValueOrUndefined(output);
                     if (unchangedTime !== undefined) {
@@ -85836,37 +69711,32 @@ var ts;
                 }
             }
             var pseudoUpToDate = false;
+            var usesPrepend = false;
             if (project.projectReferences) {
                 for (var _c = 0, _d = project.projectReferences; _c < _d.length; _c++) {
                     var ref = _d[_c];
+                    usesPrepend = usesPrepend || !!(ref.prepend);
                     var resolvedRef = ts.resolveProjectReferencePath(compilerHost, ref);
                     var refStatus = getUpToDateStatus(configFileCache.parseConfigFile(resolvedRef));
-                    // An upstream project is blocked
                     if (refStatus.type === UpToDateStatusType.Unbuildable) {
                         return {
                             type: UpToDateStatusType.UpstreamBlocked,
                             upstreamProjectName: ref.path
                         };
                     }
-                    // If the upstream project is out of date, then so are we (someone shouldn't have asked, though?)
                     if (refStatus.type !== UpToDateStatusType.UpToDate) {
                         return {
                             type: UpToDateStatusType.UpstreamOutOfDate,
                             upstreamProjectName: ref.path
                         };
                     }
-                    // If the upstream project's newest file is older than our oldest output, we
-                    // can't be out of date because of it
                     if (refStatus.newestInputFileTime <= oldestOutputFileTime) {
                         continue;
                     }
-                    // If the upstream project has only change .d.ts files, and we've built
-                    // *after* those files, then we're "psuedo up to date" and eligible for a fast rebuild
                     if (refStatus.newestDeclarationFileContentChangedTime <= oldestOutputFileTime) {
                         pseudoUpToDate = true;
                         continue;
                     }
-                    // We have an output older than an upstream output - we are out of date
                     ts.Debug.assert(oldestOutputFileName !== undefined, "Should have an oldest output filename here");
                     return {
                         type: UpToDateStatusType.OutOfDateWithUpstream,
@@ -85888,7 +69758,9 @@ var ts;
                     newerInputFileName: newestInputFileName
                 };
             }
-            // Up to date
+            if (usesPrepend) {
+                pseudoUpToDate = false;
+            }
             return {
                 type: pseudoUpToDate ? UpToDateStatusType.UpToDateWithUpstreamTypes : UpToDateStatusType.UpToDate,
                 newestDeclarationFileContentChangedTime: newestDeclarationFileContentChangedTime,
@@ -85919,10 +69791,8 @@ var ts;
             };
             function visit(projPath, inCircularContext) {
                 if (inCircularContext === void 0) { inCircularContext = false; }
-                // Already visited
                 if (permanentMarks[projPath])
                     return;
-                // Circular
                 if (temporaryMarks[projPath]) {
                     if (!inCircularContext) {
                         hadError = true;
@@ -85965,13 +69835,11 @@ var ts;
             resultFlags |= BuildResultFlags.DeclarationOutputUnchanged;
             var configFile = configFileCache.parseConfigFile(proj);
             if (!configFile) {
-                // Failed to read the config file
                 resultFlags |= BuildResultFlags.ConfigFileErrors;
                 context.projectStatus.setValue(proj, { type: UpToDateStatusType.Unbuildable, reason: "Config file errors" });
                 return resultFlags;
             }
             if (configFile.fileNames.length === 0) {
-                // Nothing to build - must be a solution file, basically
                 return BuildResultFlags.None;
             }
             var programOptions = {
@@ -85981,7 +69849,6 @@ var ts;
                 options: configFile.options
             };
             var program = ts.createProgram(programOptions);
-            // Don't emit anything in the presence of syntactic errors or options diagnostics
             var syntaxDiagnostics = program.getOptionsDiagnostics().concat(program.getSyntacticDiagnostics());
             if (syntaxDiagnostics.length) {
                 resultFlags |= BuildResultFlags.SyntaxErrors;
@@ -85992,7 +69859,6 @@ var ts;
                 context.projectStatus.setValue(proj, { type: UpToDateStatusType.Unbuildable, reason: "Syntactic errors" });
                 return resultFlags;
             }
-            // Don't emit .d.ts if there are decl file errors
             if (program.getCompilerOptions().declaration) {
                 var declDiagnostics = program.getDeclarationDiagnostics();
                 if (declDiagnostics.length) {
@@ -86005,7 +69871,6 @@ var ts;
                     return resultFlags;
                 }
             }
-            // Same as above but now for semantic diagnostics
             var semanticDiagnostics = program.getSemanticDiagnostics();
             if (semanticDiagnostics.length) {
                 resultFlags |= BuildResultFlags.TypeErrors;
@@ -86017,11 +69882,10 @@ var ts;
                 return resultFlags;
             }
             var newestDeclarationFileContentChangedTime = minimumDate;
-            program.emit(/*targetSourceFile*/ undefined, function (fileName, content, writeBom, onError) {
+            program.emit(undefined, function (fileName, content, writeBom, onError) {
                 var priorChangeTime;
                 if (isDeclarationFile(fileName) && compilerHost.fileExists(fileName)) {
                     if (compilerHost.readFile(fileName) === content) {
-                        // Check for unchanged .d.ts files
                         resultFlags &= ~BuildResultFlags.DeclarationOutputUnchanged;
                         priorChangeTime = compilerHost.getModifiedTime && compilerHost.getModifiedTime(fileName);
                     }
@@ -86057,7 +69921,6 @@ var ts;
             var resolvedNames = resolveProjectNames(configFileNames);
             if (resolvedNames === undefined)
                 return undefined;
-            // Get the same graph for cleaning we'd use for building
             var graph = createDependencyGraph(resolvedNames);
             if (graph === undefined)
                 return undefined;
@@ -86066,7 +69929,6 @@ var ts;
                 var proj = _a[_i];
                 var parsed = configFileCache.parseConfigFile(proj);
                 if (parsed === undefined) {
-                    // File has gone missing; fine to ignore here
                     continue;
                 }
                 var outputs = getAllProjectOutputs(parsed);
@@ -86091,16 +69953,18 @@ var ts;
         function cleanAllProjects() {
             var resolvedNames = getAllProjectsInScope();
             if (resolvedNames === undefined) {
-                return buildHost.message(ts.Diagnostics.Skipping_clean_because_not_all_projects_could_be_located);
+                buildHost.message(ts.Diagnostics.Skipping_clean_because_not_all_projects_could_be_located);
+                return ts.ExitStatus.DiagnosticsPresent_OutputsSkipped;
             }
             var filesToDelete = getFilesToClean(resolvedNames);
             if (filesToDelete === undefined) {
-                return buildHost.message(ts.Diagnostics.Skipping_clean_because_not_all_projects_could_be_located);
+                buildHost.message(ts.Diagnostics.Skipping_clean_because_not_all_projects_could_be_located);
+                return ts.ExitStatus.DiagnosticsPresent_OutputsSkipped;
             }
             if (context.options.dry) {
-                return buildHost.message(ts.Diagnostics.A_non_dry_build_would_delete_the_following_files_Colon_0, filesToDelete.map(function (f) { return "\r\n * " + f; }).join(""));
+                buildHost.message(ts.Diagnostics.A_non_dry_build_would_delete_the_following_files_Colon_0, filesToDelete.map(function (f) { return "\r\n * " + f; }).join(""));
+                return ts.ExitStatus.Success;
             }
-            // Do this check later to allow --clean --dry to function even if the host can't delete files
             if (!compilerHost.deleteFile) {
                 throw new Error("Host does not support deleting files");
             }
@@ -86108,6 +69972,7 @@ var ts;
                 var output = filesToDelete_1[_i];
                 compilerHost.deleteFile(output);
             }
+            return ts.ExitStatus.Success;
         }
         function resolveProjectName(name) {
             var fullPath = ts.resolvePath(compilerHost.getCurrentDirectory(), name);
@@ -86136,28 +70001,27 @@ var ts;
         function buildAllProjects() {
             var graph = getGlobalDependencyGraph();
             if (graph === undefined)
-                return;
+                return ts.ExitStatus.DiagnosticsPresent_OutputsSkipped;
             var queue = graph.buildQueue;
             reportBuildQueue(graph);
+            var anyFailed = false;
             for (var _i = 0, queue_1 = queue; _i < queue_1.length; _i++) {
                 var next = queue_1[_i];
                 var proj = configFileCache.parseConfigFile(next);
                 if (proj === undefined) {
+                    anyFailed = true;
                     break;
                 }
                 var status = getUpToDateStatus(proj);
                 verboseReportProjectStatus(next, status);
                 var projName = proj.options.configFilePath;
                 if (status.type === UpToDateStatusType.UpToDate && !context.options.force) {
-                    // Up to date, skip
                     if (defaultOptions.dry) {
-                        // In a dry build, inform the user of this fact
                         buildHost.message(ts.Diagnostics.Project_0_is_up_to_date, projName);
                     }
                     continue;
                 }
                 if (status.type === UpToDateStatusType.UpToDateWithUpstreamTypes && !context.options.force) {
-                    // Fake build
                     updateOutputTimestamps(proj);
                     continue;
                 }
@@ -86167,15 +70031,13 @@ var ts;
                     continue;
                 }
                 if (status.type === UpToDateStatusType.ContainerOnly) {
-                    // Do nothing
                     continue;
                 }
-                buildSingleProject(next);
+                var buildResult = buildSingleProject(next);
+                anyFailed = anyFailed || !!(buildResult & BuildResultFlags.AnyErrors);
             }
+            return anyFailed ? ts.ExitStatus.DiagnosticsPresent_OutputsSkipped : ts.ExitStatus.Success;
         }
-        /**
-         * Report the build ordering inferred from the current project graph if we're in verbose mode
-         */
         function reportBuildQueue(graph) {
             if (!context.options.verbose)
                 return;
@@ -86190,9 +70052,6 @@ var ts;
         function relName(path) {
             return ts.convertToRelativePath(path, compilerHost.getCurrentDirectory(), function (f) { return compilerHost.getCanonicalFileName(f); });
         }
-        /**
-         * Report the up-to-date status of a project if we're in verbose mode
-         */
         function verboseReportProjectStatus(configFileName, status) {
             if (!context.options.verbose)
                 return;
@@ -86207,7 +70066,6 @@ var ts;
                     if (status.newestInputFileTime !== undefined) {
                         return buildHost.verbose(ts.Diagnostics.Project_0_is_up_to_date_because_newest_input_1_is_older_than_oldest_output_2, relName(configFileName), relName(status.newestInputFileName), relName(status.oldestOutputFileName));
                     }
-                    // Don't report anything for "up to date because it was already built" -- too verbose
                     break;
                 case UpToDateStatusType.UpToDateWithUpstreamTypes:
                     return buildHost.verbose(ts.Diagnostics.Project_0_is_up_to_date_with_d_ts_files_from_its_dependencies, relName(configFileName));
@@ -86218,7 +70076,6 @@ var ts;
                 case UpToDateStatusType.Unbuildable:
                     return buildHost.verbose(ts.Diagnostics.Failed_to_parse_file_0_Colon_1, relName(configFileName), status.reason);
                 case UpToDateStatusType.ContainerOnly:
-                    // Don't report status on "solution" projects
                     break;
                 default:
                     ts.assertTypeIsNever(status);
@@ -86227,7 +70084,7 @@ var ts;
     }
     ts.createSolutionBuilder = createSolutionBuilder;
 })(ts || (ts = {}));
-//# sourceMappingURL=compiler.js.map
+//# sourceMappingURL=compiler.release.js.map
 var ts;
 (function (ts) {
     function countLines(program) {
@@ -86283,7 +70140,14 @@ var ts;
                 message: report,
                 errorDiagnostic: function (d) { return reportDiag_1(d); }
             };
-            return ts.performBuild(args.slice(1), ts.createCompilerHost({}), buildHost, ts.sys);
+            var result = ts.performBuild(args.slice(1), ts.createCompilerHost({}), buildHost, ts.sys);
+            // undefined = in watch mode, do not exit
+            if (result !== undefined) {
+                return ts.sys.exit(result);
+            }
+            else {
+                return;
+            }
         }
         var commandLine = ts.parseCommandLine(args);
         if (commandLine.options.build) {
diff --git a/lib/tsserver.js b/lib/tsserver.js
index 5a4c9ee9cc559..47de11d43fdda 100644
--- a/lib/tsserver.js
+++ b/lib/tsserver.js
@@ -13,6 +13,7 @@ See the Apache Version 2.0 License for specific language governing permissions
 and limitations under the License.
 ***************************************************************************** */
 
+
 "use strict";
 var __extends = (this && this.__extends) || (function () {
     var extendStatics = Object.setPrototypeOf ||
@@ -33,99 +34,18 @@ var __assign = (this && this.__assign) || Object.assign || function(t) {
     return t;
 };
 "use strict";
-/*@internal*/
-var ts;
-(function (ts) {
-    /** Gets a timestamp with (at least) ms resolution */
-    ts.timestamp = typeof performance !== "undefined" && performance.now ? function () { return performance.now(); } : Date.now ? Date.now : function () { return +(new Date()); };
-})(ts || (ts = {}));
-/*@internal*/
-/** Performance measurements for the compiler. */
-(function (ts) {
-    var performance;
-    (function (performance) {
-        // NOTE: cannot use ts.noop as core.ts loads after this
-        var profilerEvent = typeof onProfilerEvent === "function" && onProfilerEvent.profiler === true ? onProfilerEvent : function () { };
-        var enabled = false;
-        var profilerStart = 0;
-        var counts;
-        var marks;
-        var measures;
-        /**
-         * Marks a performance event.
-         *
-         * @param markName The name of the mark.
-         */
-        function mark(markName) {
-            if (enabled) {
-                marks.set(markName, ts.timestamp());
-                counts.set(markName, (counts.get(markName) || 0) + 1);
-                profilerEvent(markName);
-            }
-        }
-        performance.mark = mark;
-        /**
-         * Adds a performance measurement with the specified name.
-         *
-         * @param measureName The name of the performance measurement.
-         * @param startMarkName The name of the starting mark. If not supplied, the point at which the
-         *      profiler was enabled is used.
-         * @param endMarkName The name of the ending mark. If not supplied, the current timestamp is
-         *      used.
-         */
-        function measure(measureName, startMarkName, endMarkName) {
-            if (enabled) {
-                var end = endMarkName && marks.get(endMarkName) || ts.timestamp();
-                var start = startMarkName && marks.get(startMarkName) || profilerStart;
-                measures.set(measureName, (measures.get(measureName) || 0) + (end - start));
-            }
-        }
-        performance.measure = measure;
-        /**
-         * Gets the number of times a marker was encountered.
-         *
-         * @param markName The name of the mark.
-         */
-        function getCount(markName) {
-            return counts && counts.get(markName) || 0;
-        }
-        performance.getCount = getCount;
-        /**
-         * Gets the total duration of all measurements with the supplied name.
-         *
-         * @param measureName The name of the measure whose durations should be accumulated.
-         */
-        function getDuration(measureName) {
-            return measures && measures.get(measureName) || 0;
-        }
-        performance.getDuration = getDuration;
-        /**
-         * Iterate over each measure, performing some action
-         *
-         * @param cb The action to perform for each measure
-         */
-        function forEachMeasure(cb) {
-            measures.forEach(function (measure, key) {
-                cb(key, measure);
-            });
-        }
-        performance.forEachMeasure = forEachMeasure;
-        /** Enables (and resets) performance measurements for the compiler. */
-        function enable() {
-            counts = ts.createMap();
-            marks = ts.createMap();
-            measures = ts.createMap();
-            enabled = true;
-            profilerStart = ts.timestamp();
-        }
-        performance.enable = enable;
-        /** Disables performance measurements for the compiler. */
-        function disable() {
-            enabled = false;
-        }
-        performance.disable = disable;
-    })(performance = ts.performance || (ts.performance = {}));
-})(ts || (ts = {}));
+var __assign = (this && this.__assign) || Object.assign || function(t) {
+    for (var s, i = 1, n = arguments.length; i < n; i++) {
+        s = arguments[i];
+        for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
+            t[p] = s[p];
+    }
+    return t;
+};
+var __makeTemplateObject = (this && this.__makeTemplateObject) || function (cooked, raw) {
+    if (Object.defineProperty) { Object.defineProperty(cooked, "raw", { value: raw }); } else { cooked.raw = raw; }
+    return cooked;
+};
 var ts;
 (function (ts) {
     // WARNING: The script `configureNightly.ts` uses a regexp to parse out these values.
@@ -134,14 +54,17 @@ var ts;
     /** The version of the TypeScript compiler release */
     ts.version = ts.versionMajorMinor + ".0-dev";
 })(ts || (ts = {}));
-/* @internal */
 (function (ts) {
+    /* @internal */
     var Comparison;
     (function (Comparison) {
         Comparison[Comparison["LessThan"] = -1] = "LessThan";
         Comparison[Comparison["EqualTo"] = 0] = "EqualTo";
         Comparison[Comparison["GreaterThan"] = 1] = "GreaterThan";
     })(Comparison = ts.Comparison || (ts.Comparison = {}));
+})(ts || (ts = {}));
+/* @internal */
+(function (ts) {
     /** Create a MapLike with good performance. */
     function createDictionaryObject() {
         var map = Object.create(/*prototype*/ null); // tslint:disable-line:no-null-keyword
@@ -2003,16 +1926,99 @@ var ts;
     }
     ts.enumerateInsertsAndDeletes = enumerateInsertsAndDeletes;
 })(ts || (ts = {}));
-//# sourceMappingURL=core.js.map
-"use strict";
-var __assign = (this && this.__assign) || Object.assign || function(t) {
-    for (var s, i = 1, n = arguments.length; i < n; i++) {
-        s = arguments[i];
-        for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
-            t[p] = s[p];
-    }
-    return t;
-};
+/*@internal*/
+var ts;
+(function (ts) {
+    /** Gets a timestamp with (at least) ms resolution */
+    ts.timestamp = typeof performance !== "undefined" && performance.now ? function () { return performance.now(); } : Date.now ? Date.now : function () { return +(new Date()); };
+})(ts || (ts = {}));
+/*@internal*/
+/** Performance measurements for the compiler. */
+(function (ts) {
+    var performance;
+    (function (performance) {
+        // NOTE: cannot use ts.noop as core.ts loads after this
+        var profilerEvent = typeof onProfilerEvent === "function" && onProfilerEvent.profiler === true ? onProfilerEvent : function () { };
+        var enabled = false;
+        var profilerStart = 0;
+        var counts;
+        var marks;
+        var measures;
+        /**
+         * Marks a performance event.
+         *
+         * @param markName The name of the mark.
+         */
+        function mark(markName) {
+            if (enabled) {
+                marks.set(markName, ts.timestamp());
+                counts.set(markName, (counts.get(markName) || 0) + 1);
+                profilerEvent(markName);
+            }
+        }
+        performance.mark = mark;
+        /**
+         * Adds a performance measurement with the specified name.
+         *
+         * @param measureName The name of the performance measurement.
+         * @param startMarkName The name of the starting mark. If not supplied, the point at which the
+         *      profiler was enabled is used.
+         * @param endMarkName The name of the ending mark. If not supplied, the current timestamp is
+         *      used.
+         */
+        function measure(measureName, startMarkName, endMarkName) {
+            if (enabled) {
+                var end = endMarkName && marks.get(endMarkName) || ts.timestamp();
+                var start = startMarkName && marks.get(startMarkName) || profilerStart;
+                measures.set(measureName, (measures.get(measureName) || 0) + (end - start));
+            }
+        }
+        performance.measure = measure;
+        /**
+         * Gets the number of times a marker was encountered.
+         *
+         * @param markName The name of the mark.
+         */
+        function getCount(markName) {
+            return counts && counts.get(markName) || 0;
+        }
+        performance.getCount = getCount;
+        /**
+         * Gets the total duration of all measurements with the supplied name.
+         *
+         * @param measureName The name of the measure whose durations should be accumulated.
+         */
+        function getDuration(measureName) {
+            return measures && measures.get(measureName) || 0;
+        }
+        performance.getDuration = getDuration;
+        /**
+         * Iterate over each measure, performing some action
+         *
+         * @param cb The action to perform for each measure
+         */
+        function forEachMeasure(cb) {
+            measures.forEach(function (measure, key) {
+                cb(key, measure);
+            });
+        }
+        performance.forEachMeasure = forEachMeasure;
+        /** Enables (and resets) performance measurements for the compiler. */
+        function enable() {
+            counts = ts.createMap();
+            marks = ts.createMap();
+            measures = ts.createMap();
+            enabled = true;
+            profilerStart = ts.timestamp();
+        }
+        performance.enable = enable;
+        /** Disables performance measurements for the compiler. */
+        function disable() {
+            enabled = false;
+        }
+        performance.disable = disable;
+    })(performance = ts.performance || (ts.performance = {}));
+})(ts || (ts = {}));
 var ts;
 (function (ts) {
     // token > SyntaxKind.Identifier => token is a keyword
@@ -2746,7 +2752,7 @@ var ts;
         SymbolFlags[SymbolFlags["AliasExcludes"] = 2097152] = "AliasExcludes";
         SymbolFlags[SymbolFlags["ModuleMember"] = 2623475] = "ModuleMember";
         SymbolFlags[SymbolFlags["ExportHasLocal"] = 944] = "ExportHasLocal";
-        SymbolFlags[SymbolFlags["HasExports"] = 1952] = "HasExports";
+        SymbolFlags[SymbolFlags["HasExports"] = 1955] = "HasExports";
         SymbolFlags[SymbolFlags["HasMembers"] = 6240] = "HasMembers";
         SymbolFlags[SymbolFlags["BlockScoped"] = 418] = "BlockScoped";
         SymbolFlags[SymbolFlags["PropertyOrAccessor"] = 98308] = "PropertyOrAccessor";
@@ -4289,8 +4295,8 @@ var ts;
                     var entries = _fs.readdirSync(path || ".").sort();
                     var files = [];
                     var directories = [];
-                    for (var _i = 0, entries_1 = entries; _i < entries_1.length; _i++) {
-                        var entry = entries_1[_i];
+                    for (var _i = 0, entries_2 = entries; _i < entries_2.length; _i++) {
+                        var entry = entries_2[_i];
                         // This is necessary because on some file system node fails to exclude
                         // "." and "..". See https://github.com/nodejs/node/issues/4002
                         if (entry === "." || entry === "..") {
@@ -4470,7 +4476,7 @@ var ts;
     }
 })(ts || (ts = {}));
 // <auto-generated />
-// generated from './diagnosticInformationMap.generated.ts' by 'src\parser'
+// generated from './diagnosticInformationMap.generated.ts' by 'src\compiler'
 /* @internal */
 var ts;
 (function (ts) {
@@ -7464,11 +7470,6 @@ var ts;
 /** Non-internal stuff goes here */
 var ts;
 (function (ts) {
-    ts.emptyArray = [];
-    function closeFileWatcher(watcher) {
-        watcher.close();
-    }
-    ts.closeFileWatcher = closeFileWatcher;
     function isExternalModuleNameRelative(moduleName) {
         // TypeScript 1.0 spec (April 2014): 11.2.1
         // An external module name is "relative" if the first term is "." or "..".
@@ -7480,20 +7481,10 @@ var ts;
         return ts.sortAndDeduplicate(diagnostics, ts.compareDiagnostics);
     }
     ts.sortAndDeduplicateDiagnostics = sortAndDeduplicateDiagnostics;
-    function toPath(fileName, basePath, getCanonicalFileName) {
-        var nonCanonicalizedPath = ts.isRootedDiskPath(fileName)
-            ? ts.normalizePath(fileName)
-            : ts.getNormalizedAbsolutePath(fileName, basePath);
-        return getCanonicalFileName(nonCanonicalizedPath);
-    }
-    ts.toPath = toPath;
-    function hasEntries(map) {
-        return !!map && !!map.size;
-    }
-    ts.hasEntries = hasEntries;
 })(ts || (ts = {}));
 /* @internal */
 (function (ts) {
+    ts.emptyArray = [];
     ts.resolvingEmptyArray = [];
     ts.emptyMap = ts.createMap();
     ts.emptyUnderscoreEscapedMap = ts.emptyMap;
@@ -7516,6 +7507,10 @@ var ts;
         return new ts.MapCtr();
     }
     ts.createUnderscoreEscapedMap = createUnderscoreEscapedMap;
+    function hasEntries(map) {
+        return !!map && !!map.size;
+    }
+    ts.hasEntries = hasEntries;
     function createSymbolTable(symbols) {
         var result = ts.createMap();
         if (symbols) {
@@ -7562,6 +7557,13 @@ var ts;
             reportPrivateInBaseOfClassExpression: ts.noop,
         };
     }
+    function toPath(fileName, basePath, getCanonicalFileName) {
+        var nonCanonicalizedPath = ts.isRootedDiskPath(fileName)
+            ? ts.normalizePath(fileName)
+            : ts.getNormalizedAbsolutePath(fileName, basePath);
+        return getCanonicalFileName(nonCanonicalizedPath);
+    }
+    ts.toPath = toPath;
     function changesAffectModuleResolution(oldOptions, newOptions) {
         return !oldOptions ||
             (oldOptions.module !== newOptions.module) ||
@@ -10391,7 +10393,7 @@ var ts;
      */
     function getExternalModuleNameFromPath(host, fileName, referencePath) {
         var getCanonicalFileName = function (f) { return host.getCanonicalFileName(f); };
-        var dir = ts.toPath(referencePath ? ts.getDirectoryPath(referencePath) : host.getCommonSourceDirectory(), host.getCurrentDirectory(), getCanonicalFileName);
+        var dir = toPath(referencePath ? ts.getDirectoryPath(referencePath) : host.getCommonSourceDirectory(), host.getCurrentDirectory(), getCanonicalFileName);
         var filePath = ts.getNormalizedAbsolutePath(fileName, host.getCurrentDirectory());
         var relativePath = ts.getRelativePathToDirectoryOrUrl(dir, filePath, dir, getCanonicalFileName, /*isAbsolutePathAnUrl*/ false);
         var extensionless = ts.removeFileExtension(relativePath);
@@ -11299,6 +11301,10 @@ var ts;
         return options.watch && options.hasOwnProperty("watch");
     }
     ts.isWatchSet = isWatchSet;
+    function closeFileWatcher(watcher) {
+        watcher.close();
+    }
+    ts.closeFileWatcher = closeFileWatcher;
     function getCheckFlags(symbol) {
         return symbol.flags & 33554432 /* Transient */ ? symbol.checkFlags : 0;
     }
@@ -13721,6 +13727,9 @@ var ts;
         return node.kind === 9 /* StringLiteral */ || node.kind === 13 /* NoSubstitutionTemplateLiteral */;
     }
     ts.isStringLiteralLike = isStringLiteralLike;
+})(ts || (ts = {}));
+/* @internal */
+(function (ts) {
     /** @internal */
     function isNamedImportsOrExports(node) {
         return node.kind === 247 /* NamedImports */ || node.kind === 251 /* NamedExports */;
@@ -13737,7 +13746,7 @@ var ts;
     }
     function Type(checker, flags) {
         this.flags = flags;
-        if (Debug.isDebugging) {
+        if (ts.Debug.isDebugging) {
             this.checker = checker;
         }
     }
@@ -13768,9 +13777,10 @@ var ts;
         getSignatureConstructor: function () { return Signature; },
         getSourceMapSourceConstructor: function () { return SourceMapSource; },
     };
+    /* @internal */
     function formatStringFromArgs(text, args, baseIndex) {
         if (baseIndex === void 0) { baseIndex = 0; }
-        return text.replace(/{(\d+)}/g, function (_match, index) { return Debug.assertDefined(args[+index + baseIndex]); });
+        return text.replace(/{(\d+)}/g, function (_match, index) { return ts.Debug.assertDefined(args[+index + baseIndex]); });
     }
     ts.formatStringFromArgs = formatStringFromArgs;
     function getLocaleSpecificMessage(message) {
@@ -13778,11 +13788,11 @@ var ts;
     }
     ts.getLocaleSpecificMessage = getLocaleSpecificMessage;
     function createFileDiagnostic(file, start, length, message) {
-        Debug.assertGreaterThanOrEqual(start, 0);
-        Debug.assertGreaterThanOrEqual(length, 0);
+        ts.Debug.assertGreaterThanOrEqual(start, 0);
+        ts.Debug.assertGreaterThanOrEqual(length, 0);
         if (file) {
-            Debug.assertLessThanOrEqual(start, file.text.length);
-            Debug.assertLessThanOrEqual(start + length, file.text.length);
+            ts.Debug.assertLessThanOrEqual(start, file.text.length);
+            ts.Debug.assertLessThanOrEqual(start + length, file.text.length);
         }
         var text = getLocaleSpecificMessage(message);
         if (arguments.length > 4) {
@@ -13824,6 +13834,7 @@ var ts;
         };
     }
     ts.createCompilerDiagnostic = createCompilerDiagnostic;
+    /* @internal */
     function createCompilerDiagnosticFromMessageChain(chain) {
         return {
             file: undefined,
@@ -13860,6 +13871,7 @@ var ts;
     function getDiagnosticFilePath(diagnostic) {
         return diagnostic.file ? diagnostic.file.path : undefined;
     }
+    /* @internal */
     function compareDiagnostics(d1, d2) {
         return ts.compareStringsCaseSensitive(getDiagnosticFilePath(d1), getDiagnosticFilePath(d2)) ||
             ts.compareValues(d1.start, d2.start) ||
@@ -14074,7 +14086,7 @@ var ts;
     ts.getRootLength = getRootLength;
     // TODO(rbuckton): replace references with `resolvePath`
     function normalizePath(path) {
-        return resolvePath(path);
+        return ts.resolvePath(path);
     }
     ts.normalizePath = normalizePath;
     function normalizePathAndParts(path) {
@@ -14082,7 +14094,7 @@ var ts;
         var _a = reducePathComponents(getPathComponents(path)), root = _a[0], parts = _a.slice(1);
         if (parts.length) {
             var joinedParts = root + parts.join(ts.directorySeparator);
-            return { path: hasTrailingDirectorySeparator(path) ? ensureTrailingDirectorySeparator(joinedParts) : joinedParts, parts: parts };
+            return { path: ts.hasTrailingDirectorySeparator(path) ? ts.ensureTrailingDirectorySeparator(joinedParts) : joinedParts, parts: parts };
         }
         else {
             return { path: root, parts: parts };
@@ -14097,7 +14109,7 @@ var ts;
             return path;
         // return the leading portion of the path up to the last (non-terminal) directory separator
         // but not including any trailing directory separator.
-        path = removeTrailingDirectorySeparator(path);
+        path = ts.removeTrailingDirectorySeparator(path);
         return path.slice(0, Math.max(rootLength, path.lastIndexOf(ts.directorySeparator)));
     }
     ts.getDirectoryPath = getDirectoryPath;
@@ -14125,10 +14137,11 @@ var ts;
         return rootLength > 0 && rootLength === path.length;
     }
     ts.isDiskPathRoot = isDiskPathRoot;
+    /* @internal */
     function convertToRelativePath(absoluteOrRelativePath, basePath, getCanonicalFileName) {
         return !isRootedDiskPath(absoluteOrRelativePath)
             ? absoluteOrRelativePath
-            : getRelativePathToDirectoryOrUrl(basePath, absoluteOrRelativePath, basePath, getCanonicalFileName, /*isAbsolutePathAnUrl*/ false);
+            : ts.getRelativePathToDirectoryOrUrl(basePath, absoluteOrRelativePath, basePath, getCanonicalFileName, /*isAbsolutePathAnUrl*/ false);
     }
     ts.convertToRelativePath = convertToRelativePath;
     function pathComponents(path, rootLength) {
@@ -14146,7 +14159,7 @@ var ts;
      */
     function getPathComponents(path, currentDirectory) {
         if (currentDirectory === void 0) { currentDirectory = ""; }
-        path = combinePaths(currentDirectory, path);
+        path = ts.combinePaths(currentDirectory, path);
         var rootLength = getRootLength(path);
         return pathComponents(path, rootLength);
     }
@@ -14201,15 +14214,18 @@ var ts;
     function getPathFromPathComponents(pathComponents) {
         if (pathComponents.length === 0)
             return "";
-        var root = pathComponents[0] && ensureTrailingDirectorySeparator(pathComponents[0]);
+        var root = pathComponents[0] && ts.ensureTrailingDirectorySeparator(pathComponents[0]);
         if (pathComponents.length === 1)
             return root;
         return root + pathComponents.slice(1).join(ts.directorySeparator);
     }
     ts.getPathFromPathComponents = getPathFromPathComponents;
+})(ts || (ts = {}));
+/* @internal */
+(function (ts) {
     function getPathComponentsRelativeTo(from, to, stringEqualityComparer, getCanonicalFileName) {
-        var fromComponents = reducePathComponents(getPathComponents(from));
-        var toComponents = reducePathComponents(getPathComponents(to));
+        var fromComponents = ts.reducePathComponents(ts.getPathComponents(from));
+        var toComponents = ts.reducePathComponents(ts.getPathComponents(to));
         var start;
         for (start = 0; start < fromComponents.length && start < toComponents.length; start++) {
             var fromComponent = getCanonicalFileName(fromComponents[start]);
@@ -14228,26 +14244,27 @@ var ts;
         }
         return [""].concat(relative, components);
     }
+    ts.getPathComponentsRelativeTo = getPathComponentsRelativeTo;
     function getRelativePathFromFile(from, to, getCanonicalFileName) {
-        return ensurePathIsNonModuleName(getRelativePathFromDirectory(getDirectoryPath(from), to, getCanonicalFileName));
+        return ensurePathIsNonModuleName(getRelativePathFromDirectory(ts.getDirectoryPath(from), to, getCanonicalFileName));
     }
     ts.getRelativePathFromFile = getRelativePathFromFile;
     function getRelativePathFromDirectory(fromDirectory, to, getCanonicalFileNameOrIgnoreCase) {
-        Debug.assert((getRootLength(fromDirectory) > 0) === (getRootLength(to) > 0), "Paths must either both be absolute or both be relative");
+        Debug.assert((ts.getRootLength(fromDirectory) > 0) === (ts.getRootLength(to) > 0), "Paths must either both be absolute or both be relative");
         var getCanonicalFileName = typeof getCanonicalFileNameOrIgnoreCase === "function" ? getCanonicalFileNameOrIgnoreCase : ts.identity;
         var ignoreCase = typeof getCanonicalFileNameOrIgnoreCase === "boolean" ? getCanonicalFileNameOrIgnoreCase : false;
         var pathComponents = getPathComponentsRelativeTo(fromDirectory, to, ignoreCase ? ts.equateStringsCaseInsensitive : ts.equateStringsCaseSensitive, getCanonicalFileName);
-        return getPathFromPathComponents(pathComponents);
+        return ts.getPathFromPathComponents(pathComponents);
     }
     ts.getRelativePathFromDirectory = getRelativePathFromDirectory;
     function getRelativePathToDirectoryOrUrl(directoryPathOrUrl, relativeOrAbsolutePath, currentDirectory, getCanonicalFileName, isAbsolutePathAnUrl) {
         var pathComponents = getPathComponentsRelativeTo(resolvePath(currentDirectory, directoryPathOrUrl), resolvePath(currentDirectory, relativeOrAbsolutePath), ts.equateStringsCaseSensitive, getCanonicalFileName);
         var firstComponent = pathComponents[0];
-        if (isAbsolutePathAnUrl && isRootedDiskPath(firstComponent)) {
+        if (isAbsolutePathAnUrl && ts.isRootedDiskPath(firstComponent)) {
             var prefix = firstComponent.charAt(0) === ts.directorySeparator ? "file://" : "file:///";
             pathComponents[0] = prefix + firstComponent;
         }
-        return getPathFromPathComponents(pathComponents);
+        return ts.getPathFromPathComponents(pathComponents);
     }
     ts.getRelativePathToDirectoryOrUrl = getRelativePathToDirectoryOrUrl;
     /**
@@ -14255,19 +14272,19 @@ var ts;
      * with `./` or `../`) so as not to be confused with an unprefixed module name.
      */
     function ensurePathIsNonModuleName(path) {
-        return getRootLength(path) === 0 && !pathIsRelative(path) ? "./" + path : path;
+        return ts.getRootLength(path) === 0 && !ts.pathIsRelative(path) ? "./" + path : path;
     }
     ts.ensurePathIsNonModuleName = ensurePathIsNonModuleName;
     function getBaseFileName(path, extensions, ignoreCase) {
-        path = normalizeSlashes(path);
+        path = ts.normalizeSlashes(path);
         // if the path provided is itself the root, then it has not file name.
-        var rootLength = getRootLength(path);
+        var rootLength = ts.getRootLength(path);
         if (rootLength === path.length)
             return "";
         // return the trailing portion of the path starting after the last (non-terminal) directory
         // separator but not including any trailing directory separator.
         path = removeTrailingDirectorySeparator(path);
-        var name = path.slice(Math.max(getRootLength(path), path.lastIndexOf(ts.directorySeparator) + 1));
+        var name = path.slice(Math.max(ts.getRootLength(path), path.lastIndexOf(ts.directorySeparator) + 1));
         var extension = extensions !== undefined && ignoreCase !== undefined ? getAnyExtensionFromPath(name, extensions, ignoreCase) : undefined;
         return extension ? name.slice(0, name.length - extension.length) : name;
     }
@@ -14281,13 +14298,13 @@ var ts;
             paths[_i - 1] = arguments[_i];
         }
         if (path)
-            path = normalizeSlashes(path);
+            path = ts.normalizeSlashes(path);
         for (var _a = 0, paths_1 = paths; _a < paths_1.length; _a++) {
             var relativePath = paths_1[_a];
             if (!relativePath)
                 continue;
-            relativePath = normalizeSlashes(relativePath);
-            if (!path || getRootLength(relativePath) !== 0) {
+            relativePath = ts.normalizeSlashes(relativePath);
+            if (!path || ts.getRootLength(relativePath) !== 0) {
                 path = relativePath;
             }
             else {
@@ -14306,8 +14323,8 @@ var ts;
         for (var _i = 1; _i < arguments.length; _i++) {
             paths[_i - 1] = arguments[_i];
         }
-        var combined = ts.some(paths) ? combinePaths.apply(void 0, [path].concat(paths)) : normalizeSlashes(path);
-        var normalized = getPathFromPathComponents(reducePathComponents(getPathComponents(combined)));
+        var combined = ts.some(paths) ? combinePaths.apply(void 0, [path].concat(paths)) : ts.normalizeSlashes(path);
+        var normalized = ts.getPathFromPathComponents(ts.reducePathComponents(ts.getPathComponents(combined)));
         return normalized && hasTrailingDirectorySeparator(combined) ? ensureTrailingDirectorySeparator(normalized) : normalized;
     }
     ts.resolvePath = resolvePath;
@@ -14342,8 +14359,8 @@ var ts;
             return -1 /* LessThan */;
         if (b === undefined)
             return 1 /* GreaterThan */;
-        var aComponents = reducePathComponents(getPathComponents(a));
-        var bComponents = reducePathComponents(getPathComponents(b));
+        var aComponents = ts.reducePathComponents(ts.getPathComponents(a));
+        var bComponents = ts.reducePathComponents(ts.getPathComponents(b));
         var sharedLength = Math.min(aComponents.length, bComponents.length);
         for (var i = 0; i < sharedLength; i++) {
             var stringComparer = i === 0 ? ts.compareStringsCaseInsensitive : componentComparer;
@@ -14391,8 +14408,8 @@ var ts;
             return false;
         if (parent === child)
             return true;
-        var parentComponents = reducePathComponents(getPathComponents(parent));
-        var childComponents = reducePathComponents(getPathComponents(child));
+        var parentComponents = ts.reducePathComponents(ts.getPathComponents(parent));
+        var childComponents = ts.reducePathComponents(ts.getPathComponents(child));
         if (childComponents.length < parentComponents.length) {
             return false;
         }
@@ -14495,7 +14512,7 @@ var ts;
         var singleAsteriskRegexFragment = _a.singleAsteriskRegexFragment, doubleAsteriskRegexFragment = _a.doubleAsteriskRegexFragment, replaceWildcardCharacter = _a.replaceWildcardCharacter;
         var subpattern = "";
         var hasWrittenComponent = false;
-        var components = getNormalizedPathComponents(spec, basePath);
+        var components = ts.getNormalizedPathComponents(spec, basePath);
         var lastComponent = ts.last(components);
         if (usage !== "exclude" && lastComponent === "**") {
             return undefined;
@@ -14562,8 +14579,8 @@ var ts;
     }
     /** @param path directory of the tsconfig.json */
     function getFileMatcherPatterns(path, excludes, includes, useCaseSensitiveFileNames, currentDirectory) {
-        path = normalizePath(path);
-        currentDirectory = normalizePath(currentDirectory);
+        path = ts.normalizePath(path);
+        currentDirectory = ts.normalizePath(currentDirectory);
         var absolutePath = combinePaths(currentDirectory, path);
         return {
             includeFilePatterns: ts.map(getRegularExpressionsForWildcards(includes, absolutePath, "files"), function (pattern) { return "^" + pattern + "$"; }),
@@ -14580,8 +14597,8 @@ var ts;
     ts.getRegexFromPattern = getRegexFromPattern;
     /** @param path directory of the tsconfig.json */
     function matchFiles(path, extensions, excludes, includes, useCaseSensitiveFileNames, currentDirectory, depth, getFileSystemEntries) {
-        path = normalizePath(path);
-        currentDirectory = normalizePath(currentDirectory);
+        path = ts.normalizePath(path);
+        currentDirectory = ts.normalizePath(currentDirectory);
         var patterns = getFileMatcherPatterns(path, excludes, includes, useCaseSensitiveFileNames, currentDirectory);
         var includeFileRegexes = patterns.includeFilePatterns && patterns.includeFilePatterns.map(function (pattern) { return getRegexFromPattern(pattern, useCaseSensitiveFileNames); });
         var includeDirectoryRegex = patterns.includeDirectoryPattern && getRegexFromPattern(patterns.includeDirectoryPattern, useCaseSensitiveFileNames);
@@ -14648,7 +14665,7 @@ var ts;
                 var include = includes_1[_i];
                 // We also need to check the relative paths by converting them to absolute and normalizing
                 // in case they escape the base path (e.g "..\somedirectory")
-                var absolute = isRootedDiskPath(include) ? include : normalizePath(combinePaths(path, include));
+                var absolute = ts.isRootedDiskPath(include) ? include : ts.normalizePath(combinePaths(path, include));
                 // Append the literal and canonical candidate base paths.
                 includeBasePaths.push(getIncludeBasePath(absolute));
             }
@@ -14674,7 +14691,7 @@ var ts;
             // No "*" or "?" in the path
             return !hasExtension(absolute)
                 ? absolute
-                : removeTrailingDirectorySeparator(getDirectoryPath(absolute));
+                : removeTrailingDirectorySeparator(ts.getDirectoryPath(absolute));
         }
         return absolute.substring(0, absolute.lastIndexOf(ts.directorySeparator, wildcardOffset));
     }
@@ -14851,7 +14868,7 @@ var ts;
     })(Debug = ts.Debug || (ts.Debug = {}));
     function tryParsePattern(pattern) {
         // This should be verified outside of here and a proper error thrown.
-        Debug.assert(hasZeroOrOneAsteriskCharacter(pattern));
+        Debug.assert(ts.hasZeroOrOneAsteriskCharacter(pattern));
         var indexOfStar = pattern.indexOf("*");
         return indexOfStar === -1 ? undefined : {
             prefix: pattern.substr(0, indexOfStar),
@@ -14894,8 +14911,8 @@ var ts;
     function getAnyExtensionFromPathWorker(path, extensions, stringEqualityComparer) {
         if (typeof extensions === "string")
             extensions = [extensions];
-        for (var _i = 0, extensions_1 = extensions; _i < extensions_1.length; _i++) {
-            var extension = extensions_1[_i];
+        for (var _i = 0, extensions_2 = extensions; _i < extensions_2.length; _i++) {
+            var extension = extensions_2[_i];
             if (!ts.startsWith(extension, "."))
                 extension = "." + extension;
             if (path.length >= extension.length && path.charAt(path.length - extension.length) === ".") {
@@ -21368,8 +21385,8 @@ var ts;
                 array._children = undefined;
                 array.pos += delta;
                 array.end += delta;
-                for (var _i = 0, array_1 = array; _i < array_1.length; _i++) {
-                    var node = array_1[_i];
+                for (var _i = 0, array_8 = array; _i < array_8.length; _i++) {
+                    var node = array_8[_i];
                     visitNode(node);
                 }
             }
@@ -21519,8 +21536,8 @@ var ts;
                     array._children = undefined;
                     // Adjust the pos or end (or both) of the intersecting array accordingly.
                     adjustIntersectingElement(array, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta);
-                    for (var _i = 0, array_2 = array; _i < array_2.length; _i++) {
-                        var node = array_2[_i];
+                    for (var _i = 0, array_9 = array; _i < array_9.length; _i++) {
+                        var node = array_9[_i];
                         visitNode(node);
                     }
                     return;
@@ -25356,20 +25373,6 @@ var ts;
         return value !== undefined ? { value: value } : undefined;
     }
 })(ts || (ts = {}));
-//# sourceMappingURL=parser.js.map
-"use strict";
-var __assign = (this && this.__assign) || Object.assign || function(t) {
-    for (var s, i = 1, n = arguments.length; i < n; i++) {
-        s = arguments[i];
-        for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
-            t[p] = s[p];
-    }
-    return t;
-};
-var __makeTemplateObject = (this && this.__makeTemplateObject) || function (cooked, raw) {
-    if (Object.defineProperty) { Object.defineProperty(cooked, "raw", { value: raw }); } else { cooked.raw = raw; }
-    return cooked;
-};
 /* @internal */
 var ts;
 (function (ts) {
@@ -25567,7 +25570,7 @@ var ts;
             symbol.flags |= symbolFlags;
             node.symbol = symbol;
             symbol.declarations = ts.append(symbol.declarations, node);
-            if (symbolFlags & 1952 /* HasExports */ && !symbol.exports) {
+            if (symbolFlags & 1955 /* HasExports */ && !symbol.exports) {
                 symbol.exports = ts.createSymbolTable();
             }
             if (symbolFlags & 6240 /* HasMembers */ && !symbol.members) {
@@ -25930,8 +25933,8 @@ var ts;
                 var savedSubtreeTransformFlags = subtreeTransformFlags;
                 subtreeTransformFlags = 0 /* None */;
                 var nodeArrayFlags = 0 /* None */;
-                for (var _i = 0, nodes_1 = nodes; _i < nodes_1.length; _i++) {
-                    var node = nodes_1[_i];
+                for (var _i = 0, nodes_2 = nodes; _i < nodes_2.length; _i++) {
+                    var node = nodes_2[_i];
                     bindFunction(node);
                     nodeArrayFlags |= node.transformFlags & ~536870912 /* HasComputedFlags */;
                 }
@@ -28936,7 +28939,7 @@ var ts;
                 }
                 var t = getTypeOfSymbol(symbol);
                 visitType(t); // Should handle members on classes and such
-                if (symbol.flags & 1952 /* HasExports */) {
+                if (symbol.flags & 1955 /* HasExports */) {
                     symbol.exports.forEach(visitSymbol);
                 }
                 ts.forEach(symbol.declarations, function (d) {
@@ -31234,7 +31237,7 @@ var ts;
             // The ES6 spec permits export * declarations in a module to circularly reference the module itself. For example,
             // module 'a' can 'export * from "b"' and 'b' can 'export * from "a"' without error.
             function visit(symbol) {
-                if (!(symbol && symbol.flags & 1952 /* HasExports */ && ts.pushIfUnique(visitedSymbols, symbol))) {
+                if (!(symbol && symbol.flags & 1955 /* HasExports */ && ts.pushIfUnique(visitedSymbols, symbol))) {
                     return;
                 }
                 var symbols = ts.cloneMap(symbol.exports);
@@ -31322,8 +31325,8 @@ var ts;
         }
         function findConstructorDeclaration(node) {
             var members = node.members;
-            for (var _i = 0, members_1 = members; _i < members_1.length; _i++) {
-                var member = members_1[_i];
+            for (var _i = 0, members_2 = members; _i < members_2.length; _i++) {
+                var member = members_2[_i];
                 if (member.kind === 155 /* Constructor */ && ts.nodeIsPresent(member.body)) {
                     return member;
                 }
@@ -33229,7 +33232,7 @@ var ts;
             var definedInConstructor = false;
             var definedInMethod = false;
             var jsDocType;
-            var _loop_1 = function (declaration) {
+            var _loop_4 = function (declaration) {
                 var declarationInConstructor = false;
                 var expression = declaration.kind === 200 /* BinaryExpression */ ? declaration :
                     declaration.kind === 185 /* PropertyAccessExpression */ ? ts.cast(declaration.parent, ts.isBinaryExpression) :
@@ -33272,20 +33275,20 @@ var ts;
                         special === 2 /* ModuleExports */ &&
                         symbol.escapedName === "export=" /* ExportEquals */) {
                         var exportedType_1 = resolveStructuredTypeMembers(type_2);
-                        var members_2 = ts.createSymbolTable();
-                        ts.copyEntries(exportedType_1.members, members_2);
+                        var members_3 = ts.createSymbolTable();
+                        ts.copyEntries(exportedType_1.members, members_3);
                         symbol.exports.forEach(function (s, name) {
-                            if (members_2.has(name)) {
+                            if (members_3.has(name)) {
                                 var exportedMember = exportedType_1.members.get(name);
                                 var union = createSymbol(s.flags | exportedMember.flags, name);
                                 union.type = getUnionType([getTypeOfSymbol(s), getTypeOfSymbol(exportedMember)]);
-                                members_2.set(name, union);
+                                members_3.set(name, union);
                             }
                             else {
-                                members_2.set(name, s);
+                                members_3.set(name, s);
                             }
                         });
-                        type_2 = createAnonymousType(exportedType_1.symbol, members_2, exportedType_1.callSignatures, exportedType_1.constructSignatures, exportedType_1.stringIndexInfo, exportedType_1.numberIndexInfo);
+                        type_2 = createAnonymousType(exportedType_1.symbol, members_3, exportedType_1.callSignatures, exportedType_1.constructSignatures, exportedType_1.stringIndexInfo, exportedType_1.numberIndexInfo);
                     }
                     var anyedType = type_2;
                     if (isEmptyArrayLiteralType(type_2)) {
@@ -33302,7 +33305,7 @@ var ts;
             };
             for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
                 var declaration = _a[_i];
-                var state_2 = _loop_1(declaration);
+                var state_2 = _loop_4(declaration);
                 if (typeof state_2 === "object")
                     return state_2.value;
             }
@@ -33771,8 +33774,8 @@ var ts;
         // The function allocates a new array if the input type parameter set is undefined, but otherwise it modifies the set
         // in-place and returns the same array.
         function appendTypeParameters(typeParameters, declarations) {
-            for (var _i = 0, declarations_1 = declarations; _i < declarations_1.length; _i++) {
-                var declaration = declarations_1[_i];
+            for (var _i = 0, declarations_2 = declarations; _i < declarations_2.length; _i++) {
+                var declaration = declarations_2[_i];
                 typeParameters = ts.appendIfUnique(typeParameters, getDeclaredTypeOfTypeParameter(getSymbolOfNode(declaration)));
             }
             return typeParameters;
@@ -34350,8 +34353,8 @@ var ts;
         // we check symbols to see if we can quickly conclude they are free of "this" references, thus needing no instantiation.
         function createInstantiatedSymbolTable(symbols, mapper, mappingThisOnly) {
             var result = ts.createSymbolTable();
-            for (var _i = 0, symbols_1 = symbols; _i < symbols_1.length; _i++) {
-                var symbol = symbols_1[_i];
+            for (var _i = 0, symbols_2 = symbols; _i < symbols_2.length; _i++) {
+                var symbol = symbols_2[_i];
                 result.set(symbol.escapedName, mappingThisOnly && isThisless(symbol) ? symbol : instantiateSymbol(symbol, mapper));
             }
             return result;
@@ -34501,9 +34504,9 @@ var ts;
                         // If we have an existing early-bound member, combine its declarations so that we can
                         // report an error at each declaration.
                         var declarations = earlySymbol ? ts.concatenate(earlySymbol.declarations, lateSymbol.declarations) : lateSymbol.declarations;
-                        var name_1 = ts.declarationNameToString(decl.name);
-                        ts.forEach(declarations, function (declaration) { return error(ts.getNameOfDeclaration(declaration) || declaration, ts.Diagnostics.Duplicate_declaration_0, name_1); });
-                        error(decl.name || decl, ts.Diagnostics.Duplicate_declaration_0, name_1);
+                        var name_2 = ts.declarationNameToString(decl.name);
+                        ts.forEach(declarations, function (declaration) { return error(ts.getNameOfDeclaration(declaration) || declaration, ts.Diagnostics.Duplicate_declaration_0, name_2); });
+                        error(decl.name || decl, ts.Diagnostics.Duplicate_declaration_0, name_2);
                         lateSymbol = createSymbol(0 /* None */, memberName, 1024 /* Late */);
                     }
                     lateSymbol.nameType = type;
@@ -34536,8 +34539,8 @@ var ts;
                     var decl = _a[_i];
                     var members = ts.getMembersOfDeclaration(decl);
                     if (members) {
-                        for (var _b = 0, members_3 = members; _b < members_3.length; _b++) {
-                            var member = members_3[_b];
+                        for (var _b = 0, members_4 = members; _b < members_4.length; _b++) {
+                            var member = members_4[_b];
                             if (isStatic === ts.hasStaticModifier(member) && hasLateBindableName(member)) {
                                 lateBindMember(symbol, earlySymbols, lateSymbols, member);
                             }
@@ -34813,7 +34816,7 @@ var ts;
             var numberIndexInfo;
             var types = type.types;
             var mixinCount = ts.countWhere(types, isMixinConstructorType);
-            var _loop_2 = function (i) {
+            var _loop_5 = function (i) {
                 var t = type.types[i];
                 // When an intersection type contains mixin constructor types, the construct signatures from
                 // those types are discarded and their return types are mixed into the return types of all
@@ -34836,7 +34839,7 @@ var ts;
                 numberIndexInfo = intersectIndexInfos(numberIndexInfo, getIndexInfoOfType(t, 1 /* Number */));
             };
             for (var i = 0; i < types.length; i++) {
-                _loop_2(i);
+                _loop_5(i);
             }
             setStructuredTypeMembers(type, emptySymbols, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
         }
@@ -36416,8 +36419,8 @@ var ts;
         function getTypeOfGlobalSymbol(symbol, arity) {
             function getTypeDeclaration(symbol) {
                 var declarations = symbol.declarations;
-                for (var _i = 0, declarations_2 = declarations; _i < declarations_2.length; _i++) {
-                    var declaration = declarations_2[_i];
+                for (var _i = 0, declarations_3 = declarations; _i < declarations_3.length; _i++) {
+                    var declaration = declarations_3[_i];
                     switch (declaration.kind) {
                         case 235 /* ClassDeclaration */:
                         case 236 /* InterfaceDeclaration */:
@@ -36878,7 +36881,7 @@ var ts;
             var unionType = types[unionIndex];
             var intersection = unionType.types;
             var i = types.length - 1;
-            var _loop_3 = function () {
+            var _loop_6 = function () {
                 var t = types[i];
                 if (t.flags & 67108864 /* UnionOfUnitTypes */) {
                     intersection = ts.filter(intersection, function (u) { return containsType(t.types, u); });
@@ -36887,7 +36890,7 @@ var ts;
                 i--;
             };
             while (i > unionIndex) {
-                _loop_3();
+                _loop_6();
             }
             if (intersection === unionType.types) {
                 return false;
@@ -38834,7 +38837,7 @@ var ts;
                         // check excess properties against discriminant type only, not the entire union
                         return hasExcessProperties(source, discriminant, /*discriminant*/ undefined, reportErrors);
                     }
-                    var _loop_4 = function (prop) {
+                    var _loop_7 = function (prop) {
                         if (!isKnownProperty(target, prop.escapedName, isComparingJsxAttributes)) {
                             if (reportErrors) {
                                 // We know *exactly* where things went wrong when comparing the types.
@@ -38873,7 +38876,7 @@ var ts;
                     };
                     for (var _i = 0, _a = getPropertiesOfObjectType(source); _i < _a.length; _i++) {
                         var prop = _a[_i];
-                        var state_3 = _loop_4(prop);
+                        var state_3 = _loop_7(prop);
                         if (typeof state_3 === "object")
                             return state_3.value;
                     }
@@ -39319,10 +39322,10 @@ var ts;
                 var modifiersRelated = relation === comparableRelation || (relation === identityRelation ? getMappedTypeModifiers(source) === getMappedTypeModifiers(target) :
                     getCombinedMappedTypeOptionality(source) <= getCombinedMappedTypeOptionality(target));
                 if (modifiersRelated) {
-                    var result_1;
-                    if (result_1 = isRelatedTo(getConstraintTypeFromMappedType(target), getConstraintTypeFromMappedType(source), reportErrors)) {
+                    var result_2;
+                    if (result_2 = isRelatedTo(getConstraintTypeFromMappedType(target), getConstraintTypeFromMappedType(source), reportErrors)) {
                         var mapper = createTypeMapper([getTypeParameterFromMappedType(source)], [getTypeParameterFromMappedType(target)]);
-                        return result_1 & isRelatedTo(instantiateType(getTemplateTypeFromMappedType(source), mapper), getTemplateTypeFromMappedType(target), reportErrors);
+                        return result_2 & isRelatedTo(instantiateType(getTemplateTypeFromMappedType(source), mapper), getTemplateTypeFromMappedType(target), reportErrors);
                     }
                 }
                 return 0 /* False */;
@@ -44649,7 +44652,7 @@ var ts;
                 // Assignability failure - check each prop individually, and if that fails, fall back on the bad error span
                 if (ts.length(openingLikeElement.attributes.properties)) {
                     var reportedError = false;
-                    var _loop_5 = function (prop) {
+                    var _loop_8 = function (prop) {
                         if (ts.isJsxSpreadAttribute(prop))
                             return "continue";
                         var name = ts.idText(prop.name);
@@ -44663,7 +44666,7 @@ var ts;
                     };
                     for (var _b = 0, _c = openingLikeElement.attributes.properties; _b < _c.length; _b++) {
                         var prop = _c[_b];
-                        _loop_5(prop);
+                        _loop_8(prop);
                     }
                     if (reportedError) {
                         return;
@@ -45596,13 +45599,13 @@ var ts;
         function getEffectiveCallArguments(node) {
             if (node.kind === 189 /* TaggedTemplateExpression */) {
                 var template = node.template;
-                var args_1 = [undefined]; // TODO: GH#18217
+                var args_4 = [undefined]; // TODO: GH#18217
                 if (template.kind === 202 /* TemplateExpression */) {
                     ts.forEach(template.templateSpans, function (span) {
-                        args_1.push(span.expression);
+                        args_4.push(span.expression);
                     });
                 }
-                return args_1;
+                return args_4;
             }
             else if (node.kind === 150 /* Decorator */) {
                 // For a decorator, we return undefined as we will determine
@@ -49014,8 +49017,8 @@ var ts;
             }
             var duplicateFunctionDeclaration = false;
             var multipleConstructorImplementation = false;
-            for (var _i = 0, declarations_3 = declarations; _i < declarations_3.length; _i++) {
-                var current = declarations_3[_i];
+            for (var _i = 0, declarations_4 = declarations; _i < declarations_4.length; _i++) {
+                var current = declarations_4[_i];
                 var node = current;
                 var inAmbientContext = node.flags & 4194304 /* Ambient */;
                 var inAmbientContextOrInterface = node.parent.kind === 236 /* InterfaceDeclaration */ || node.parent.kind === 166 /* TypeLiteral */ || inAmbientContext;
@@ -49184,10 +49187,10 @@ var ts;
                     case 243 /* ImportEqualsDeclaration */:
                     case 246 /* NamespaceImport */:
                     case 245 /* ImportClause */:
-                        var result_2 = 0 /* None */;
+                        var result_3 = 0 /* None */;
                         var target = resolveAlias(getSymbolOfNode(d));
-                        ts.forEach(target.declarations, function (d) { result_2 |= getDeclarationSpaces(d); });
-                        return result_2;
+                        ts.forEach(target.declarations, function (d) { result_3 |= getDeclarationSpaces(d); });
+                        return result_3;
                     case 232 /* VariableDeclaration */:
                     case 182 /* BindingElement */:
                     case 234 /* FunctionDeclaration */:
@@ -49984,8 +49987,8 @@ var ts;
                         : ts.createDiagnosticForNode(declarationList.parent.kind === 214 /* VariableStatement */ ? declarationList.parent : declarationList, ts.Diagnostics.All_variables_are_unused));
                 }
                 else {
-                    for (var _i = 0, declarations_4 = declarations; _i < declarations_4.length; _i++) {
-                        var decl = declarations_4[_i];
+                    for (var _i = 0, declarations_5 = declarations; _i < declarations_5.length; _i++) {
+                        var decl = declarations_5[_i];
                         addDiagnostic(0 /* Local */, ts.createDiagnosticForNode(decl, ts.Diagnostics._0_is_declared_but_its_value_is_never_read, ts.idText(ts.cast(decl.name, ts.isIdentifier))));
                     }
                 }
@@ -51169,8 +51172,8 @@ var ts;
                 if (!areTypeParametersIdentical(declarations, type.localTypeParameters)) {
                     // Report an error on every conflicting declaration.
                     var name = symbolToString(symbol);
-                    for (var _i = 0, declarations_5 = declarations; _i < declarations_5.length; _i++) {
-                        var declaration = declarations_5[_i];
+                    for (var _i = 0, declarations_6 = declarations; _i < declarations_6.length; _i++) {
+                        var declaration = declarations_6[_i];
                         error(declaration.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_type_parameters, name);
                     }
                 }
@@ -51179,8 +51182,8 @@ var ts;
         function areTypeParametersIdentical(declarations, targetParameters) {
             var maxTypeArgumentCount = ts.length(targetParameters);
             var minTypeArgumentCount = getMinTypeArgumentCount(targetParameters);
-            for (var _i = 0, declarations_6 = declarations; _i < declarations_6.length; _i++) {
-                var declaration = declarations_6[_i];
+            for (var _i = 0, declarations_7 = declarations; _i < declarations_7.length; _i++) {
+                var declaration = declarations_7[_i];
                 // If this declaration has too few or too many type parameters, we report an error
                 var sourceParameters = ts.getEffectiveTypeParameterDeclarations(declaration);
                 var numTypeParameters = sourceParameters.length;
@@ -51334,7 +51337,7 @@ var ts;
         function issueMemberSpecificError(node, typeWithThis, baseWithThis, broadDiag) {
             // iterate over all implemented properties and issue errors on each one which isn't compatible, rather than the class as a whole, if possible
             var issuedMemberError = false;
-            var _loop_6 = function (member) {
+            var _loop_9 = function (member) {
                 if (ts.hasStaticModifier(member)) {
                     return "continue";
                 }
@@ -51353,7 +51356,7 @@ var ts;
             };
             for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
                 var member = _a[_i];
-                _loop_6(member);
+                _loop_9(member);
             }
             if (!issuedMemberError) {
                 // check again with diagnostics to generate a less-specific error
@@ -51638,12 +51641,12 @@ var ts;
             function evaluate(expr) {
                 switch (expr.kind) {
                     case 198 /* PrefixUnaryExpression */:
-                        var value_1 = evaluate(expr.operand);
-                        if (typeof value_1 === "number") {
+                        var value_2 = evaluate(expr.operand);
+                        if (typeof value_2 === "number") {
                             switch (expr.operator) {
-                                case 37 /* PlusToken */: return value_1;
-                                case 38 /* MinusToken */: return -value_1;
-                                case 52 /* TildeToken */: return ~value_1;
+                                case 37 /* PlusToken */: return value_2;
+                                case 38 /* MinusToken */: return -value_2;
+                                case 52 /* TildeToken */: return ~value_2;
                             }
                         }
                         break;
@@ -51782,8 +51785,8 @@ var ts;
         }
         function getFirstNonAmbientClassOrFunctionDeclaration(symbol) {
             var declarations = symbol.declarations;
-            for (var _i = 0, declarations_7 = declarations; _i < declarations_7.length; _i++) {
-                var declaration = declarations_7[_i];
+            for (var _i = 0, declarations_8 = declarations; _i < declarations_8.length; _i++) {
+                var declaration = declarations_8[_i];
                 if ((declaration.kind === 235 /* ClassDeclaration */ ||
                     (declaration.kind === 234 /* FunctionDeclaration */ && ts.nodeIsPresent(declaration.body))) &&
                     !(declaration.flags & 4194304 /* Ambient */)) {
@@ -52206,9 +52209,9 @@ var ts;
                     }
                 }
                 // Checks for export * conflicts
-                var exports = getExportsOfModule(moduleSymbol);
-                if (exports) {
-                    exports.forEach(function (_a, id) {
+                var exports_1 = getExportsOfModule(moduleSymbol);
+                if (exports_1) {
+                    exports_1.forEach(function (_a, id) {
                         var declarations = _a.declarations, flags = _a.flags;
                         if (id === "__export") {
                             return;
@@ -52225,8 +52228,8 @@ var ts;
                             return;
                         }
                         if (exportedDeclarationsCount > 1) {
-                            for (var _i = 0, declarations_8 = declarations; _i < declarations_8.length; _i++) {
-                                var declaration = declarations_8[_i];
+                            for (var _i = 0, declarations_9 = declarations; _i < declarations_9.length; _i++) {
+                                var declaration = declarations_9[_i];
                                 if (isNotOverload(declaration)) {
                                     diagnostics.add(ts.createDiagnosticForNode(declaration, ts.Diagnostics.Cannot_redeclare_exported_variable_0, ts.unescapeLeadingUnderscores(id)));
                                 }
@@ -54289,8 +54292,8 @@ var ts;
         }
         function checkGrammarForOmittedArgument(args) {
             if (args) {
-                for (var _i = 0, args_2 = args; _i < args_2.length; _i++) {
-                    var arg = args_2[_i];
+                for (var _i = 0, args_5 = args; _i < args_5.length; _i++) {
+                    var arg = args_5[_i];
                     if (arg.kind === 206 /* OmittedExpression */) {
                         return grammarErrorAtPos(arg, arg.pos, 0, ts.Diagnostics.Argument_expression_expected);
                     }
@@ -60261,8 +60264,8 @@ var ts;
         }
         var subtreeFlags = 0 /* None */;
         var nodeArrayFlags = 0 /* None */;
-        for (var _i = 0, nodes_2 = nodes; _i < nodes_2.length; _i++) {
-            var node = nodes_2[_i];
+        for (var _i = 0, nodes_3 = nodes; _i < nodes_3.length; _i++) {
+            var node = nodes_3[_i];
             subtreeFlags |= aggregateTransformFlagsForNode(node);
             nodeArrayFlags |= node.transformFlags & ~536870912 /* HasComputedFlags */;
         }
@@ -62327,8 +62330,8 @@ var ts;
         function generateClassElementDecorationExpressions(node, isStatic) {
             var members = getDecoratedClassElements(node, isStatic);
             var expressions;
-            for (var _i = 0, members_4 = members; _i < members_4.length; _i++) {
-                var member = members_4[_i];
+            for (var _i = 0, members_5 = members; _i < members_5.length; _i++) {
+                var member = members_5[_i];
                 var expression = generateClassElementDecorationExpression(node, member);
                 if (expression) {
                     if (!expressions) {
@@ -74870,8 +74873,8 @@ var ts;
                 return;
             }
             necessaryTypeRefernces = necessaryTypeRefernces || ts.createMap();
-            for (var _i = 0, typeReferenceDirectives_1 = typeReferenceDirectives; _i < typeReferenceDirectives_1.length; _i++) {
-                var ref = typeReferenceDirectives_1[_i];
+            for (var _i = 0, typeReferenceDirectives_2 = typeReferenceDirectives; _i < typeReferenceDirectives_2.length; _i++) {
+                var ref = typeReferenceDirectives_2[_i];
                 necessaryTypeRefernces.set(ref, true);
             }
         }
@@ -75779,7 +75782,7 @@ var ts;
             var prop = ts.createProperty(/*decorators*/ undefined, maskModifiers(node, /*mask*/ undefined, (!accessors.setAccessor) ? 64 /* Readonly */ : 0 /* None */), node.name, node.questionToken, ensureType(node, accessorType), /*initializer*/ undefined);
             var leadingsSyntheticCommentRanges = accessors.secondAccessor && ts.getLeadingCommentRangesOfNode(accessors.secondAccessor, currentSourceFile);
             if (leadingsSyntheticCommentRanges) {
-                var _loop_7 = function (range) {
+                var _loop_10 = function (range) {
                     if (range.kind === 3 /* MultiLineCommentTrivia */) {
                         var text = currentSourceFile.text.slice(range.pos + 2, range.end - 2);
                         var lines = text.split(/\r\n?|\n/g);
@@ -75793,7 +75796,7 @@ var ts;
                 };
                 for (var _i = 0, leadingsSyntheticCommentRanges_1 = leadingsSyntheticCommentRanges; _i < leadingsSyntheticCommentRanges_1.length; _i++) {
                     var range = leadingsSyntheticCommentRanges_1[_i];
-                    _loop_7(range);
+                    _loop_10(range);
                 }
             }
             return prop;
@@ -76002,8 +76005,8 @@ var ts;
             }
         };
         // Ensure the parse tree is clean before applying transformations
-        for (var _i = 0, nodes_3 = nodes; _i < nodes_3.length; _i++) {
-            var node = nodes_3[_i];
+        for (var _i = 0, nodes_4 = nodes; _i < nodes_4.length; _i++) {
+            var node = nodes_4[_i];
             ts.disposeEmitNodes(ts.getSourceFileOfNode(ts.getParseTreeNode(node)));
         }
         ts.performance.mark("beforeTransform");
@@ -76194,8 +76197,8 @@ var ts;
         function dispose() {
             if (state < 3 /* Disposed */) {
                 // Clean up emit nodes on parse tree
-                for (var _i = 0, nodes_4 = nodes; _i < nodes_4.length; _i++) {
-                    var node = nodes_4[_i];
+                for (var _i = 0, nodes_5 = nodes; _i < nodes_5.length; _i++) {
+                    var node = nodes_5[_i];
                     ts.disposeEmitNodes(ts.getSourceFileOfNode(ts.getParseTreeNode(node)));
                 }
                 // Release references to external entries for GC purposes.
@@ -79751,8 +79754,8 @@ var ts;
         function writeLines(text) {
             var lines = text.split(/\r\n?|\n/g);
             var indentation = ts.guessIndentation(lines);
-            for (var _a = 0, lines_1 = lines; _a < lines_1.length; _a++) {
-                var lineText = lines_1[_a];
+            for (var _a = 0, lines_2 = lines; _a < lines_2.length; _a++) {
+                var lineText = lines_2[_a];
                 var line = indentation ? lineText.slice(indentation) : lineText;
                 if (line.length) {
                     writeLine();
@@ -81280,13 +81283,13 @@ var ts;
                 // which per above occurred during the current program creation.
                 // Since we assume the filesystem does not change during program creation,
                 // it is safe to reuse resolutions from the earlier call.
-                var result_3 = [];
+                var result_4 = [];
                 for (var _i = 0, moduleNames_1 = moduleNames; _i < moduleNames_1.length; _i++) {
                     var moduleName = moduleNames_1[_i];
                     var resolvedModule = file.resolvedModules.get(moduleName);
-                    result_3.push(resolvedModule);
+                    result_4.push(resolvedModule);
                 }
-                return result_3;
+                return result_4;
             }
             // At this point, we know at least one of the following hold:
             // - file has local declarations for ambient modules
@@ -81984,8 +81987,8 @@ var ts;
                             }
                             break;
                     }
-                    for (var _b = 0, nodes_5 = nodes; _b < nodes_5.length; _b++) {
-                        var node = nodes_5[_b];
+                    for (var _b = 0, nodes_6 = nodes; _b < nodes_6.length; _b++) {
+                        var node = nodes_6[_b];
                         walk(node);
                     }
                 }
@@ -82642,14 +82645,14 @@ var ts;
             if (options.composite && rootNames.length < files.length) {
                 var normalizedRootNames = rootNames.map(function (r) { return ts.normalizePath(r).toLowerCase(); });
                 var sourceFiles = files.filter(function (f) { return !f.isDeclarationFile; }).map(function (f) { return ts.normalizePath(f.path).toLowerCase(); });
-                var _loop_8 = function (file) {
+                var _loop_11 = function (file) {
                     if (normalizedRootNames.every(function (r) { return r !== file; })) {
                         programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.File_0_is_not_in_project_file_list_Projects_must_list_all_files_or_use_an_include_pattern, file));
                     }
                 };
                 for (var _i = 0, sourceFiles_4 = sourceFiles; _i < sourceFiles_4.length; _i++) {
                     var file = sourceFiles_4[_i];
-                    _loop_8(file);
+                    _loop_11(file);
                 }
             }
             if (options.paths) {
@@ -84518,8 +84521,8 @@ var ts;
         function tryGetAnyFileFromPath(host, path) {
             // We check all js, `node` and `json` extensions in addition to TS, since node module resolution would also choose those over the directory
             var extensions = ts.getSupportedExtensions({ allowJs: true }, [{ extension: "node", isMixedContent: false }, { extension: "json", isMixedContent: false, scriptKind: 6 /* JSON */ }]);
-            for (var _i = 0, extensions_1 = extensions; _i < extensions_1.length; _i++) {
-                var e = extensions_1[_i];
+            for (var _i = 0, extensions_3 = extensions; _i < extensions_3.length; _i++) {
+                var e = extensions_3[_i];
                 var fullPath = path + e;
                 if (host.fileExists(fullPath)) { // TODO: GH#18217
                     return fullPath;
@@ -85417,7 +85420,6 @@ var ts;
             getKeys: getKeys
         };
     }
-    ts.createDependencyMapper = createDependencyMapper;
     function getOutputDeclarationFileName(inputFileName, configFile) {
         var relativePath = ts.getRelativePathFromDirectory(rootDirOfOptions(configFile.options, configFile.options.configFilePath), inputFileName, /*ignoreCase*/ true);
         var outputPath = ts.resolvePath(configFile.options.declarationDir || configFile.options.outDir || ts.getDirectoryPath(configFile.options.configFilePath), relativePath);
@@ -85543,8 +85545,8 @@ var ts;
         var clean = false;
         var watch = false;
         var projects = [];
-        for (var _i = 0, args_3 = args; _i < args_3.length; _i++) {
-            var arg = args_3[_i];
+        for (var _i = 0, args_6 = args; _i < args_6.length; _i++) {
+            var arg = args_6[_i];
             switch (arg.toLowerCase()) {
                 case "-v":
                 case "--verbose":
@@ -85568,23 +85570,28 @@ var ts;
                 case "--?":
                 case "-?":
                 case "--help":
-                    return ts.printHelp(buildOpts, "--build ");
+                    ts.printHelp(buildOpts, "--build ");
+                    return ts.ExitStatus.Success;
             }
             // Not a flag, parse as filename
             addProject(arg);
         }
         // Nonsensical combinations
         if (clean && force) {
-            return buildHost.error(ts.Diagnostics.Options_0_and_1_cannot_be_combined, "clean", "force");
+            buildHost.error(ts.Diagnostics.Options_0_and_1_cannot_be_combined, "clean", "force");
+            return ts.ExitStatus.DiagnosticsPresent_OutputsSkipped;
         }
         if (clean && verbose) {
-            return buildHost.error(ts.Diagnostics.Options_0_and_1_cannot_be_combined, "clean", "verbose");
+            buildHost.error(ts.Diagnostics.Options_0_and_1_cannot_be_combined, "clean", "verbose");
+            return ts.ExitStatus.DiagnosticsPresent_OutputsSkipped;
         }
         if (clean && watch) {
-            return buildHost.error(ts.Diagnostics.Options_0_and_1_cannot_be_combined, "clean", "watch");
+            buildHost.error(ts.Diagnostics.Options_0_and_1_cannot_be_combined, "clean", "watch");
+            return ts.ExitStatus.DiagnosticsPresent_OutputsSkipped;
         }
         if (watch && dry) {
-            return buildHost.error(ts.Diagnostics.Options_0_and_1_cannot_be_combined, "watch", "dry");
+            buildHost.error(ts.Diagnostics.Options_0_and_1_cannot_be_combined, "watch", "dry");
+            return ts.ExitStatus.DiagnosticsPresent_OutputsSkipped;
         }
         if (projects.length === 0) {
             // tsc -b invoked with no extra arguments; act as if invoked with "tsc -b ."
@@ -85592,14 +85599,13 @@ var ts;
         }
         var builder = createSolutionBuilder(compilerHost, buildHost, projects, { dry: dry, force: force, verbose: verbose }, system);
         if (clean) {
-            builder.cleanAllProjects();
-        }
-        else {
-            builder.buildAllProjects();
+            return builder.cleanAllProjects();
         }
         if (watch) {
-            return builder.startWatching();
+            builder.startWatching();
+            return undefined;
         }
+        return builder.buildAllProjects();
         function addProject(projectSpecification) {
             var fileName = ts.resolvePath(compilerHost.getCurrentDirectory(), projectSpecification);
             var refPath = ts.resolveProjectReferencePath(compilerHost, { path: fileName });
@@ -85647,7 +85653,7 @@ var ts;
                 // Everything is broken - we don't even know what to watch. Give up.
                 return;
             }
-            var _loop_9 = function (resolved) {
+            var _loop_12 = function (resolved) {
                 var cfg = configFileCache.parseConfigFile(resolved);
                 if (cfg) {
                     // Watch this file
@@ -85674,7 +85680,7 @@ var ts;
             };
             for (var _i = 0, _a = graph.buildQueue; _i < _a.length; _i++) {
                 var resolved = _a[_i];
-                _loop_9(resolved);
+                _loop_12(resolved);
             }
             function invalidateProjectAndScheduleBuilds(resolved) {
                 invalidateProject(resolved);
@@ -85855,9 +85861,11 @@ var ts;
                 }
             }
             var pseudoUpToDate = false;
+            var usesPrepend = false;
             if (project.projectReferences) {
                 for (var _c = 0, _d = project.projectReferences; _c < _d.length; _c++) {
                     var ref = _d[_c];
+                    usesPrepend = usesPrepend || !!(ref.prepend);
                     var resolvedRef = ts.resolveProjectReferencePath(compilerHost, ref);
                     var refStatus = getUpToDateStatus(configFileCache.parseConfigFile(resolvedRef));
                     // An upstream project is blocked
@@ -85907,6 +85915,9 @@ var ts;
                     newerInputFileName: newestInputFileName
                 };
             }
+            if (usesPrepend) {
+                pseudoUpToDate = false;
+            }
             // Up to date
             return {
                 type: pseudoUpToDate ? UpToDateStatusType.UpToDateWithUpstreamTypes : UpToDateStatusType.UpToDate,
@@ -86110,14 +86121,17 @@ var ts;
         function cleanAllProjects() {
             var resolvedNames = getAllProjectsInScope();
             if (resolvedNames === undefined) {
-                return buildHost.message(ts.Diagnostics.Skipping_clean_because_not_all_projects_could_be_located);
+                buildHost.message(ts.Diagnostics.Skipping_clean_because_not_all_projects_could_be_located);
+                return ts.ExitStatus.DiagnosticsPresent_OutputsSkipped;
             }
             var filesToDelete = getFilesToClean(resolvedNames);
             if (filesToDelete === undefined) {
-                return buildHost.message(ts.Diagnostics.Skipping_clean_because_not_all_projects_could_be_located);
+                buildHost.message(ts.Diagnostics.Skipping_clean_because_not_all_projects_could_be_located);
+                return ts.ExitStatus.DiagnosticsPresent_OutputsSkipped;
             }
             if (context.options.dry) {
-                return buildHost.message(ts.Diagnostics.A_non_dry_build_would_delete_the_following_files_Colon_0, filesToDelete.map(function (f) { return "\r\n * " + f; }).join(""));
+                buildHost.message(ts.Diagnostics.A_non_dry_build_would_delete_the_following_files_Colon_0, filesToDelete.map(function (f) { return "\r\n * " + f; }).join(""));
+                return ts.ExitStatus.Success;
             }
             // Do this check later to allow --clean --dry to function even if the host can't delete files
             if (!compilerHost.deleteFile) {
@@ -86127,6 +86141,7 @@ var ts;
                 var output = filesToDelete_1[_i];
                 compilerHost.deleteFile(output);
             }
+            return ts.ExitStatus.Success;
         }
         function resolveProjectName(name) {
             var fullPath = ts.resolvePath(compilerHost.getCurrentDirectory(), name);
@@ -86155,13 +86170,15 @@ var ts;
         function buildAllProjects() {
             var graph = getGlobalDependencyGraph();
             if (graph === undefined)
-                return;
+                return ts.ExitStatus.DiagnosticsPresent_OutputsSkipped;
             var queue = graph.buildQueue;
             reportBuildQueue(graph);
+            var anyFailed = false;
             for (var _i = 0, queue_1 = queue; _i < queue_1.length; _i++) {
                 var next = queue_1[_i];
                 var proj = configFileCache.parseConfigFile(next);
                 if (proj === undefined) {
+                    anyFailed = true;
                     break;
                 }
                 var status = getUpToDateStatus(proj);
@@ -86189,8 +86206,10 @@ var ts;
                     // Do nothing
                     continue;
                 }
-                buildSingleProject(next);
+                var buildResult = buildSingleProject(next);
+                anyFailed = anyFailed || !!(buildResult & BuildResultFlags.AnyErrors);
             }
+            return anyFailed ? ts.ExitStatus.DiagnosticsPresent_OutputsSkipped : ts.ExitStatus.Success;
         }
         /**
          * Report the build ordering inferred from the current project graph if we're in verbose mode
@@ -111557,6 +111576,7 @@ var TypeScript;
 var toolsVersion = ts.versionMajorMinor;
 //# sourceMappingURL=services.js.map
 "use strict";
+/* @internal */
 var ts;
 (function (ts) {
     var server;
diff --git a/lib/tsserverlibrary.d.ts b/lib/tsserverlibrary.d.ts
index 2cfb99444e582..6de868d459aa1 100644
--- a/lib/tsserverlibrary.d.ts
+++ b/lib/tsserverlibrary.d.ts
@@ -13,6 +13,13 @@ See the Apache Version 2.0 License for specific language governing permissions
 and limitations under the License.
 ***************************************************************************** */
 
+
+
+declare namespace ts {
+    const versionMajorMinor = "3.0";
+    /** The version of the TypeScript compiler release */
+    const version: string;
+}
 declare namespace ts {
     /**
      * Type of objects whose values are all of the same type.
@@ -22,6 +29,9 @@ declare namespace ts {
     interface MapLike<T> {
         [index: string]: T;
     }
+    interface SortedArray<T> extends Array<T> {
+        " __sortedArrayBrand": any;
+    }
     /** ES6 Map interface, only read methods included. */
     interface ReadonlyMap<T> {
         get(key: string): T | undefined;
@@ -52,6 +62,528 @@ declare namespace ts {
     interface Push<T> {
         push(...values: T[]): void;
     }
+    type EqualityComparer<T> = (a: T, b: T) => boolean;
+    type Comparer<T> = (a: T, b: T) => Comparison;
+    enum Comparison {
+        LessThan = -1,
+        EqualTo = 0,
+        GreaterThan = 1
+    }
+}
+declare namespace ts {
+    /** Create a new map. If a template object is provided, the map will copy entries from it. */
+    function createMap<T>(): Map<T>;
+    function createMapFromEntries<T>(entries: [string, T][]): Map<T>;
+    function createMapFromTemplate<T>(template: MapLike<T>): Map<T>;
+    const MapCtr: new <T>() => Map<T>;
+    function length(array: ReadonlyArray<any> | undefined): number;
+    /**
+     * Iterates through 'array' by index and performs the callback on each element of array until the callback
+     * returns a truthy value, then returns that value.
+     * If no such value is found, the callback is applied to each element of array and undefined is returned.
+     */
+    function forEach<T, U>(array: ReadonlyArray<T> | undefined, callback: (element: T, index: number) => U | undefined): U | undefined;
+    /** Like `forEach`, but suitable for use with numbers and strings (which may be falsy). */
+    function firstDefined<T, U>(array: ReadonlyArray<T> | undefined, callback: (element: T, index: number) => U | undefined): U | undefined;
+    function firstDefinedIterator<T, U>(iter: Iterator<T>, callback: (element: T) => U | undefined): U | undefined;
+    function zipWith<T, U, V>(arrayA: ReadonlyArray<T>, arrayB: ReadonlyArray<U>, callback: (a: T, b: U, index: number) => V): V[];
+    function zipToIterator<T, U>(arrayA: ReadonlyArray<T>, arrayB: ReadonlyArray<U>): Iterator<[T, U]>;
+    function zipToMap<T>(keys: ReadonlyArray<string>, values: ReadonlyArray<T>): Map<T>;
+    /**
+     * Iterates through `array` by index and performs the callback on each element of array until the callback
+     * returns a falsey value, then returns false.
+     * If no such value is found, the callback is applied to each element of array and `true` is returned.
+     */
+    function every<T>(array: ReadonlyArray<T>, callback: (element: T, index: number) => boolean): boolean;
+    /** Works like Array.prototype.find, returning `undefined` if no element satisfying the predicate is found. */
+    function find<T, U extends T>(array: ReadonlyArray<T>, predicate: (element: T, index: number) => element is U): U | undefined;
+    function find<T>(array: ReadonlyArray<T>, predicate: (element: T, index: number) => boolean): T | undefined;
+    function findLast<T, U extends T>(array: ReadonlyArray<T>, predicate: (element: T, index: number) => element is U): U | undefined;
+    function findLast<T>(array: ReadonlyArray<T>, predicate: (element: T, index: number) => boolean): T | undefined;
+    /** Works like Array.prototype.findIndex, returning `-1` if no element satisfying the predicate is found. */
+    function findIndex<T>(array: ReadonlyArray<T>, predicate: (element: T, index: number) => boolean, startIndex?: number): number;
+    function findLastIndex<T>(array: ReadonlyArray<T>, predicate: (element: T, index: number) => boolean, startIndex?: number): number;
+    /**
+     * Returns the first truthy result of `callback`, or else fails.
+     * This is like `forEach`, but never returns undefined.
+     */
+    function findMap<T, U>(array: ReadonlyArray<T>, callback: (element: T, index: number) => U | undefined): U;
+    function contains<T>(array: ReadonlyArray<T> | undefined, value: T, equalityComparer?: EqualityComparer<T>): boolean;
+    function arraysEqual<T>(a: ReadonlyArray<T>, b: ReadonlyArray<T>, equalityComparer?: EqualityComparer<T>): boolean;
+    function indexOfAnyCharCode(text: string, charCodes: ReadonlyArray<number>, start?: number): number;
+    function countWhere<T>(array: ReadonlyArray<T>, predicate: (x: T, i: number) => boolean): number;
+    /**
+     * Filters an array by a predicate function. Returns the same array instance if the predicate is
+     * true for all elements, otherwise returns a new array instance containing the filtered subset.
+     */
+    function filter<T, U extends T>(array: T[], f: (x: T) => x is U): U[];
+    function filter<T>(array: T[], f: (x: T) => boolean): T[];
+    function filter<T, U extends T>(array: ReadonlyArray<T>, f: (x: T) => x is U): ReadonlyArray<U>;
+    function filter<T, U extends T>(array: ReadonlyArray<T>, f: (x: T) => boolean): ReadonlyArray<T>;
+    function filter<T, U extends T>(array: T[] | undefined, f: (x: T) => x is U): U[] | undefined;
+    function filter<T>(array: T[] | undefined, f: (x: T) => boolean): T[] | undefined;
+    function filter<T, U extends T>(array: ReadonlyArray<T> | undefined, f: (x: T) => x is U): ReadonlyArray<U> | undefined;
+    function filter<T, U extends T>(array: ReadonlyArray<T> | undefined, f: (x: T) => boolean): ReadonlyArray<T> | undefined;
+    function filterMutate<T>(array: T[], f: (x: T, i: number, array: T[]) => boolean): void;
+    function clear(array: {}[]): void;
+    function map<T, U>(array: ReadonlyArray<T>, f: (x: T, i: number) => U): U[];
+    function map<T, U>(array: ReadonlyArray<T> | undefined, f: (x: T, i: number) => U): U[] | undefined;
+    function mapIterator<T, U>(iter: Iterator<T>, mapFn: (x: T) => U): Iterator<U>;
+    function sameMap<T>(array: T[], f: (x: T, i: number) => T): T[];
+    function sameMap<T>(array: ReadonlyArray<T>, f: (x: T, i: number) => T): ReadonlyArray<T>;
+    function sameMap<T>(array: T[] | undefined, f: (x: T, i: number) => T): T[] | undefined;
+    function sameMap<T>(array: ReadonlyArray<T> | undefined, f: (x: T, i: number) => T): ReadonlyArray<T> | undefined;
+    /**
+     * Flattens an array containing a mix of array or non-array elements.
+     *
+     * @param array The array to flatten.
+     */
+    function flatten<T>(array: ReadonlyArray<T | ReadonlyArray<T> | undefined>): T[];
+    function flatten<T>(array: ReadonlyArray<T | ReadonlyArray<T> | undefined> | undefined): T[] | undefined;
+    /**
+     * Maps an array. If the mapped value is an array, it is spread into the result.
+     *
+     * @param array The array to map.
+     * @param mapfn The callback used to map the result into one or more values.
+     */
+    function flatMap<T, U>(array: ReadonlyArray<T>, mapfn: (x: T, i: number) => U | ReadonlyArray<U> | undefined): U[];
+    function flatMap<T, U>(array: ReadonlyArray<T> | undefined, mapfn: (x: T, i: number) => U | ReadonlyArray<U> | undefined): U[] | undefined;
+    function flatMapIterator<T, U>(iter: Iterator<T>, mapfn: (x: T) => U[] | Iterator<U> | undefined): Iterator<U>;
+    /**
+     * Maps an array. If the mapped value is an array, it is spread into the result.
+     * Avoids allocation if all elements map to themselves.
+     *
+     * @param array The array to map.
+     * @param mapfn The callback used to map the result into one or more values.
+     */
+    function sameFlatMap<T>(array: T[], mapfn: (x: T, i: number) => T | ReadonlyArray<T>): T[];
+    function sameFlatMap<T>(array: ReadonlyArray<T>, mapfn: (x: T, i: number) => T | ReadonlyArray<T>): ReadonlyArray<T>;
+    function mapAllOrFail<T, U>(array: ReadonlyArray<T>, mapFn: (x: T, i: number) => U | undefined): U[] | undefined;
+    function mapDefined<T, U>(array: ReadonlyArray<T> | undefined, mapFn: (x: T, i: number) => U | undefined): U[];
+    function mapDefinedIterator<T, U>(iter: Iterator<T>, mapFn: (x: T) => U | undefined): Iterator<U>;
+    const emptyIterator: Iterator<never>;
+    function singleIterator<T>(value: T): Iterator<T>;
+    /**
+     * Maps contiguous spans of values with the same key.
+     *
+     * @param array The array to map.
+     * @param keyfn A callback used to select the key for an element.
+     * @param mapfn A callback used to map a contiguous chunk of values to a single value.
+     */
+    function spanMap<T, K, U>(array: ReadonlyArray<T>, keyfn: (x: T, i: number) => K, mapfn: (chunk: T[], key: K, start: number, end: number) => U): U[];
+    function spanMap<T, K, U>(array: ReadonlyArray<T> | undefined, keyfn: (x: T, i: number) => K, mapfn: (chunk: T[], key: K, start: number, end: number) => U): U[] | undefined;
+    function mapEntries<T, U>(map: ReadonlyMap<T>, f: (key: string, value: T) => [string, U]): Map<U>;
+    function mapEntries<T, U>(map: ReadonlyMap<T> | undefined, f: (key: string, value: T) => [string, U]): Map<U> | undefined;
+    function some<T>(array: ReadonlyArray<T> | undefined): array is ReadonlyArray<T>;
+    function some<T>(array: ReadonlyArray<T> | undefined, predicate: (value: T) => boolean): boolean;
+    /** Calls the callback with (start, afterEnd) index pairs for each range where 'pred' is true. */
+    function getRangesWhere<T>(arr: ReadonlyArray<T>, pred: (t: T) => boolean, cb: (start: number, afterEnd: number) => void): void;
+    function concatenate<T>(array1: T[], array2: T[]): T[];
+    function concatenate<T>(array1: ReadonlyArray<T>, array2: ReadonlyArray<T>): ReadonlyArray<T>;
+    function concatenate<T>(array1: T[] | undefined, array2: T[] | undefined): T[];
+    function concatenate<T>(array1: ReadonlyArray<T> | undefined, array2: ReadonlyArray<T> | undefined): ReadonlyArray<T>;
+    /**
+     * Deduplicates an unsorted array.
+     * @param equalityComparer An optional `EqualityComparer` used to determine if two values are duplicates.
+     * @param comparer An optional `Comparer` used to sort entries before comparison, though the
+     * result will remain in the original order in `array`.
+     */
+    function deduplicate<T>(array: ReadonlyArray<T>, equalityComparer?: EqualityComparer<T>, comparer?: Comparer<T>): T[];
+    function deduplicate<T>(array: ReadonlyArray<T> | undefined, equalityComparer?: EqualityComparer<T>, comparer?: Comparer<T>): T[] | undefined;
+    function insertSorted<T>(array: SortedArray<T>, insert: T, compare: Comparer<T>): void;
+    function sortAndDeduplicate<T>(array: ReadonlyArray<T>, comparer: Comparer<T>, equalityComparer?: EqualityComparer<T>): T[];
+    function arrayIsEqualTo<T>(array1: ReadonlyArray<T> | undefined, array2: ReadonlyArray<T> | undefined, equalityComparer?: (a: T, b: T) => boolean): boolean;
+    /**
+     * Compacts an array, removing any falsey elements.
+     */
+    function compact<T>(array: T[]): T[];
+    function compact<T>(array: ReadonlyArray<T>): ReadonlyArray<T>;
+    /**
+     * Gets the relative complement of `arrayA` with respect to `arrayB`, returning the elements that
+     * are not present in `arrayA` but are present in `arrayB`. Assumes both arrays are sorted
+     * based on the provided comparer.
+     */
+    function relativeComplement<T>(arrayA: T[] | undefined, arrayB: T[] | undefined, comparer: Comparer<T>): T[] | undefined;
+    function sum<T extends Record<K, number>, K extends string>(array: ReadonlyArray<T>, prop: K): number;
+    /**
+     * Appends a value to an array, returning the array.
+     *
+     * @param to The array to which `value` is to be appended. If `to` is `undefined`, a new array
+     * is created if `value` was appended.
+     * @param value The value to append to the array. If `value` is `undefined`, nothing is
+     * appended.
+     */
+    function append<T>(to: T[], value: T | undefined): T[];
+    function append<T>(to: T[] | undefined, value: T): T[];
+    function append<T>(to: T[] | undefined, value: T | undefined): T[] | undefined;
+    function append<T>(to: Push<T>, value: T | undefined): void;
+    /**
+     * Appends a range of value to an array, returning the array.
+     *
+     * @param to The array to which `value` is to be appended. If `to` is `undefined`, a new array
+     * is created if `value` was appended.
+     * @param from The values to append to the array. If `from` is `undefined`, nothing is
+     * appended. If an element of `from` is `undefined`, that element is not appended.
+     * @param start The offset in `from` at which to start copying values.
+     * @param end The offset in `from` at which to stop copying values (non-inclusive).
+     */
+    function addRange<T>(to: T[], from: ReadonlyArray<T> | undefined, start?: number, end?: number): T[];
+    function addRange<T>(to: T[] | undefined, from: ReadonlyArray<T> | undefined, start?: number, end?: number): T[] | undefined;
+    /**
+     * @return Whether the value was added.
+     */
+    function pushIfUnique<T>(array: T[], toAdd: T, equalityComparer?: EqualityComparer<T>): boolean;
+    /**
+     * Unlike `pushIfUnique`, this can take `undefined` as an input, and returns a new array.
+     */
+    function appendIfUnique<T>(array: T[] | undefined, toAdd: T, equalityComparer?: EqualityComparer<T>): T[];
+    /**
+     * Returns a new sorted array.
+     */
+    function sort<T>(array: ReadonlyArray<T>, comparer: Comparer<T>): T[];
+    function best<T>(iter: Iterator<T>, isBetter: (a: T, b: T) => boolean): T | undefined;
+    function arrayIterator<T>(array: ReadonlyArray<T>): Iterator<T>;
+    /**
+     * Stable sort of an array. Elements equal to each other maintain their relative position in the array.
+     */
+    function stableSort<T>(array: ReadonlyArray<T>, comparer: Comparer<T>): T[];
+    function rangeEquals<T>(array1: ReadonlyArray<T>, array2: ReadonlyArray<T>, pos: number, end: number): boolean;
+    /**
+     * Returns the element at a specific offset in an array if non-empty, `undefined` otherwise.
+     * A negative offset indicates the element should be retrieved from the end of the array.
+     */
+    function elementAt<T>(array: ReadonlyArray<T> | undefined, offset: number): T | undefined;
+    /**
+     * Returns the first element of an array if non-empty, `undefined` otherwise.
+     */
+    function firstOrUndefined<T>(array: ReadonlyArray<T>): T | undefined;
+    function first<T>(array: ReadonlyArray<T>): T;
+    /**
+     * Returns the last element of an array if non-empty, `undefined` otherwise.
+     */
+    function lastOrUndefined<T>(array: ReadonlyArray<T>): T | undefined;
+    function last<T>(array: ReadonlyArray<T>): T;
+    /**
+     * Returns the only element of an array if it contains only one element, `undefined` otherwise.
+     */
+    function singleOrUndefined<T>(array: ReadonlyArray<T> | undefined): T | undefined;
+    /**
+     * Returns the only element of an array if it contains only one element; otheriwse, returns the
+     * array.
+     */
+    function singleOrMany<T>(array: T[]): T | T[];
+    function singleOrMany<T>(array: ReadonlyArray<T>): T | ReadonlyArray<T>;
+    function singleOrMany<T>(array: T[] | undefined): T | T[] | undefined;
+    function singleOrMany<T>(array: ReadonlyArray<T> | undefined): T | ReadonlyArray<T> | undefined;
+    function replaceElement<T>(array: ReadonlyArray<T>, index: number, value: T): T[];
+    /**
+     * Performs a binary search, finding the index at which `value` occurs in `array`.
+     * If no such index is found, returns the 2's-complement of first index at which
+     * `array[index]` exceeds `value`.
+     * @param array A sorted array whose first element must be no larger than number
+     * @param value The value to be searched for in the array.
+     * @param keySelector A callback used to select the search key from `value` and each element of
+     * `array`.
+     * @param keyComparer A callback used to compare two keys in a sorted array.
+     * @param offset An offset into `array` at which to start the search.
+     */
+    function binarySearch<T, U>(array: ReadonlyArray<T>, value: T, keySelector: (v: T) => U, keyComparer: Comparer<U>, offset?: number): number;
+    function reduceLeft<T, U>(array: ReadonlyArray<T> | undefined, f: (memo: U, value: T, i: number) => U, initial: U, start?: number, count?: number): U;
+    function reduceLeft<T>(array: ReadonlyArray<T>, f: (memo: T, value: T, i: number) => T): T | undefined;
+    /**
+     * Indicates whether a map-like contains an own property with the specified key.
+     *
+     * @param map A map-like.
+     * @param key A property key.
+     */
+    function hasProperty(map: MapLike<any>, key: string): boolean;
+    /**
+     * Gets the value of an owned property in a map-like.
+     *
+     * @param map A map-like.
+     * @param key A property key.
+     */
+    function getProperty<T>(map: MapLike<T>, key: string): T | undefined;
+    /**
+     * Gets the owned, enumerable property keys of a map-like.
+     */
+    function getOwnKeys<T>(map: MapLike<T>): string[];
+    function getOwnValues<T>(sparseArray: T[]): T[];
+    /** Shims `Array.from`. */
+    function arrayFrom<T, U>(iterator: Iterator<T>, map: (t: T) => U): U[];
+    function arrayFrom<T>(iterator: Iterator<T>): T[];
+    function assign<T extends object>(t: T, ...args: (T | undefined)[]): T;
+    /**
+     * Performs a shallow equality comparison of the contents of two map-likes.
+     *
+     * @param left A map-like whose properties should be compared.
+     * @param right A map-like whose properties should be compared.
+     */
+    function equalOwnProperties<T>(left: MapLike<T> | undefined, right: MapLike<T> | undefined, equalityComparer?: EqualityComparer<T>): boolean;
+    /**
+     * Creates a map from the elements of an array.
+     *
+     * @param array the array of input elements.
+     * @param makeKey a function that produces a key for a given element.
+     *
+     * This function makes no effort to avoid collisions; if any two elements produce
+     * the same key with the given 'makeKey' function, then the element with the higher
+     * index in the array will be the one associated with the produced key.
+     */
+    function arrayToMap<T>(array: ReadonlyArray<T>, makeKey: (value: T) => string | undefined): Map<T>;
+    function arrayToMap<T, U>(array: ReadonlyArray<T>, makeKey: (value: T) => string | undefined, makeValue: (value: T) => U): Map<U>;
+    function arrayToNumericMap<T>(array: ReadonlyArray<T>, makeKey: (value: T) => number): T[];
+    function arrayToNumericMap<T, U>(array: ReadonlyArray<T>, makeKey: (value: T) => number, makeValue: (value: T) => U): U[];
+    function arrayToMultiMap<T>(values: ReadonlyArray<T>, makeKey: (value: T) => string): MultiMap<T>;
+    function arrayToMultiMap<T, U>(values: ReadonlyArray<T>, makeKey: (value: T) => string, makeValue: (value: T) => U): MultiMap<U>;
+    function group<T>(values: ReadonlyArray<T>, getGroupId: (value: T) => string): ReadonlyArray<ReadonlyArray<T>>;
+    function clone<T>(object: T): T;
+    function extend<T1, T2>(first: T1, second: T2): T1 & T2;
+    interface MultiMap<T> extends Map<T[]> {
+        /**
+         * Adds the value to an array of values associated with the key, and returns the array.
+         * Creates the array if it does not already exist.
+         */
+        add(key: string, value: T): T[];
+        /**
+         * Removes a value from an array of values associated with the key.
+         * Does not preserve the order of those values.
+         * Does nothing if `key` is not in `map`, or `value` is not in `map[key]`.
+         */
+        remove(key: string, value: T): void;
+    }
+    function createMultiMap<T>(): MultiMap<T>;
+    /**
+     * Tests whether a value is an array.
+     */
+    function isArray(value: any): value is ReadonlyArray<{}>;
+    function toArray<T>(value: T | T[]): T[];
+    function toArray<T>(value: T | ReadonlyArray<T>): ReadonlyArray<T>;
+    /**
+     * Tests whether a value is string
+     */
+    function isString(text: any): text is string;
+    function tryCast<TOut extends TIn, TIn = any>(value: TIn | undefined, test: (value: TIn) => value is TOut): TOut | undefined;
+    function cast<TOut extends TIn, TIn = any>(value: TIn | undefined, test: (value: TIn) => value is TOut): TOut;
+    /** Does nothing. */
+    function noop(_?: {} | null | undefined): void;
+    /** Do nothing and return false */
+    function returnFalse(): false;
+    /** Do nothing and return true */
+    function returnTrue(): true;
+    /** Returns its argument. */
+    function identity<T>(x: T): T;
+    /** Returns lower case string */
+    function toLowerCase(x: string): string;
+    /** Throws an error because a function is not implemented. */
+    function notImplemented(): never;
+    function memoize<T>(callback: () => T): () => T;
+    /**
+     * High-order function, creates a function that executes a function composition.
+     * For example, `chain(a, b)` is the equivalent of `x => ((a', b') => y => b'(a'(y)))(a(x), b(x))`
+     *
+     * @param args The functions to chain.
+     */
+    function chain<T, U>(...args: ((t: T) => (u: U) => U)[]): (t: T) => (u: U) => U;
+    /**
+     * High-order function, composes functions. Note that functions are composed inside-out;
+     * for example, `compose(a, b)` is the equivalent of `x => b(a(x))`.
+     *
+     * @param args The functions to compose.
+     */
+    function compose<T>(...args: ((t: T) => T)[]): (t: T) => T;
+    enum AssertionLevel {
+        None = 0,
+        Normal = 1,
+        Aggressive = 2,
+        VeryAggressive = 3
+    }
+    /**
+     * Safer version of `Function` which should not be called.
+     * Every function should be assignable to this, but this should not be assignable to every function.
+     */
+    type AnyFunction = (...args: never[]) => void;
+    namespace Debug {
+        let currentAssertionLevel: AssertionLevel;
+        let isDebugging: boolean;
+        function shouldAssert(level: AssertionLevel): boolean;
+        function assert(expression: boolean, message?: string, verboseDebugInfo?: string | (() => string), stackCrawlMark?: AnyFunction): void;
+        function assertEqual<T>(a: T, b: T, msg?: string, msg2?: string): void;
+        function assertLessThan(a: number, b: number, msg?: string): void;
+        function assertLessThanOrEqual(a: number, b: number): void;
+        function assertGreaterThanOrEqual(a: number, b: number): void;
+        function fail(message?: string, stackCrawlMark?: AnyFunction): never;
+        function assertDefined<T>(value: T | null | undefined, message?: string): T;
+        function assertEachDefined<T, A extends ReadonlyArray<T>>(value: A, message?: string): A;
+        function assertNever(member: never, message?: string, stackCrawlMark?: AnyFunction): never;
+        function getFunctionName(func: AnyFunction): any;
+    }
+    function equateValues<T>(a: T, b: T): boolean;
+    /**
+     * Compare the equality of two strings using a case-sensitive ordinal comparison.
+     *
+     * Case-sensitive comparisons compare both strings one code-point at a time using the integer
+     * value of each code-point after applying `toUpperCase` to each string. We always map both
+     * strings to their upper-case form as some unicode characters do not properly round-trip to
+     * lowercase (such as `ẞ` (German sharp capital s)).
+     */
+    function equateStringsCaseInsensitive(a: string, b: string): boolean;
+    /**
+     * Compare the equality of two strings using a case-sensitive ordinal comparison.
+     *
+     * Case-sensitive comparisons compare both strings one code-point at a time using the
+     * integer value of each code-point.
+     */
+    function equateStringsCaseSensitive(a: string, b: string): boolean;
+    /**
+     * Compare two numeric values for their order relative to each other.
+     * To compare strings, use any of the `compareStrings` functions.
+     */
+    function compareValues(a: number | undefined, b: number | undefined): Comparison;
+    function min<T>(a: T, b: T, compare: Comparer<T>): T;
+    /**
+     * Compare two strings using a case-insensitive ordinal comparison.
+     *
+     * Ordinal comparisons are based on the difference between the unicode code points of both
+     * strings. Characters with multiple unicode representations are considered unequal. Ordinal
+     * comparisons provide predictable ordering, but place "a" after "B".
+     *
+     * Case-insensitive comparisons compare both strings one code-point at a time using the integer
+     * value of each code-point after applying `toUpperCase` to each string. We always map both
+     * strings to their upper-case form as some unicode characters do not properly round-trip to
+     * lowercase (such as `ẞ` (German sharp capital s)).
+     */
+    function compareStringsCaseInsensitive(a: string, b: string): Comparison;
+    /**
+     * Compare two strings using a case-sensitive ordinal comparison.
+     *
+     * Ordinal comparisons are based on the difference between the unicode code points of both
+     * strings. Characters with multiple unicode representations are considered unequal. Ordinal
+     * comparisons provide predictable ordering, but place "a" after "B".
+     *
+     * Case-sensitive comparisons compare both strings one code-point at a time using the integer
+     * value of each code-point.
+     */
+    function compareStringsCaseSensitive(a: string | undefined, b: string | undefined): Comparison;
+    function getStringComparer(ignoreCase?: boolean): typeof compareStringsCaseInsensitive;
+    function getUILocale(): string | undefined;
+    function setUILocale(value: string | undefined): void;
+    /**
+     * Compare two strings in a using the case-sensitive sort behavior of the UI locale.
+     *
+     * Ordering is not predictable between different host locales, but is best for displaying
+     * ordered data for UI presentation. Characters with multiple unicode representations may
+     * be considered equal.
+     *
+     * Case-sensitive comparisons compare strings that differ in base characters, or
+     * accents/diacritic marks, or case as unequal.
+     */
+    function compareStringsCaseSensitiveUI(a: string, b: string): Comparison;
+    function compareProperties<T, K extends keyof T>(a: T | undefined, b: T | undefined, key: K, comparer: Comparer<T[K]>): Comparison;
+    /** True is greater than false. */
+    function compareBooleans(a: boolean, b: boolean): Comparison;
+    /**
+     * Given a name and a list of names that are *not* equal to the name, return a spelling suggestion if there is one that is close enough.
+     * Names less than length 3 only check for case-insensitive equality, not Levenshtein distance.
+     *
+     * If there is a candidate that's the same except for case, return that.
+     * If there is a candidate that's within one edit of the name, return that.
+     * Otherwise, return the candidate with the smallest Levenshtein distance,
+     *    except for candidates:
+     *      * With no name
+     *      * Whose length differs from the target name by more than 0.34 of the length of the name.
+     *      * Whose levenshtein distance is more than 0.4 of the length of the name
+     *        (0.4 allows 1 substitution/transposition for every 5 characters,
+     *         and 1 insertion/deletion at 3 characters)
+     */
+    function getSpellingSuggestion<T>(name: string, candidates: T[], getName: (candidate: T) => string | undefined): T | undefined;
+    function endsWith(str: string, suffix: string): boolean;
+    function removeSuffix(str: string, suffix: string): string;
+    function tryRemoveSuffix(str: string, suffix: string): string | undefined;
+    function stringContains(str: string, substring: string): boolean;
+    function fileExtensionIs(path: string, extension: string): boolean;
+    function fileExtensionIsOneOf(path: string, extensions: ReadonlyArray<string>): boolean;
+    /**
+     * Takes a string like "jquery-min.4.2.3" and returns "jquery"
+     */
+    function removeMinAndVersionNumbers(fileName: string): string;
+    /** Remove an item from an array, moving everything to its right one space left. */
+    function orderedRemoveItem<T>(array: T[], item: T): boolean;
+    /** Remove an item by index from an array, moving everything to its right one space left. */
+    function orderedRemoveItemAt<T>(array: T[], index: number): void;
+    function unorderedRemoveItemAt<T>(array: T[], index: number): void;
+    /** Remove the *first* occurrence of `item` from the array. */
+    function unorderedRemoveItem<T>(array: T[], item: T): boolean;
+    type GetCanonicalFileName = (fileName: string) => string;
+    function createGetCanonicalFileName(useCaseSensitiveFileNames: boolean): GetCanonicalFileName;
+    /** Represents a "prefix*suffix" pattern. */
+    interface Pattern {
+        prefix: string;
+        suffix: string;
+    }
+    function patternText({ prefix, suffix }: Pattern): string;
+    /**
+     * Given that candidate matches pattern, returns the text matching the '*'.
+     * E.g.: matchedText(tryParsePattern("foo*baz"), "foobarbaz") === "bar"
+     */
+    function matchedText(pattern: Pattern, candidate: string): string;
+    /** Return the object corresponding to the best pattern to match `candidate`. */
+    function findBestPatternMatch<T>(values: ReadonlyArray<T>, getPattern: (value: T) => Pattern, candidate: string): T | undefined;
+    function startsWith(str: string, prefix: string): boolean;
+    function removePrefix(str: string, prefix: string): string;
+    function tryRemovePrefix(str: string, prefix: string): string | undefined;
+    function and<T>(f: (arg: T) => boolean, g: (arg: T) => boolean): (arg: T) => boolean;
+    function or<T>(f: (arg: T) => boolean, g: (arg: T) => boolean): (arg: T) => boolean;
+    function assertTypeIsNever(_: never): void;
+    function singleElementArray<T>(t: T | undefined): T[] | undefined;
+    function enumerateInsertsAndDeletes<T, U>(newItems: ReadonlyArray<T>, oldItems: ReadonlyArray<U>, comparer: (a: T, b: U) => Comparison, inserted: (newItem: T) => void, deleted: (oldItem: U) => void, unchanged?: (oldItem: U, newItem: T) => void): void;
+}
+declare namespace ts {
+    /** Gets a timestamp with (at least) ms resolution */
+    const timestamp: () => number;
+}
+/** Performance measurements for the compiler. */
+declare namespace ts.performance {
+    /**
+     * Marks a performance event.
+     *
+     * @param markName The name of the mark.
+     */
+    function mark(markName: string): void;
+    /**
+     * Adds a performance measurement with the specified name.
+     *
+     * @param measureName The name of the performance measurement.
+     * @param startMarkName The name of the starting mark. If not supplied, the point at which the
+     *      profiler was enabled is used.
+     * @param endMarkName The name of the ending mark. If not supplied, the current timestamp is
+     *      used.
+     */
+    function measure(measureName: string, startMarkName?: string, endMarkName?: string): void;
+    /**
+     * Gets the number of times a marker was encountered.
+     *
+     * @param markName The name of the mark.
+     */
+    function getCount(markName: string): number;
+    /**
+     * Gets the total duration of all measurements with the supplied name.
+     *
+     * @param measureName The name of the measure whose durations should be accumulated.
+     */
+    function getDuration(measureName: string): number;
+    /**
+     * Iterate over each measure, performing some action
+     *
+     * @param cb The action to perform for each measure
+     */
+    function forEachMeasure(cb: (measureName: string, duration: number) => void): void;
+    /** Enables (and resets) performance measurements for the compiler. */
+    function enable(): void;
+    /** Disables performance measurements for the compiler. */
+    function disable(): void;
+}
+declare namespace ts {
     type Path = string & {
         __pathBrand: any;
     };
@@ -396,7 +928,9 @@ declare namespace ts {
         FirstJSDocNode = 278,
         LastJSDocNode = 298,
         FirstJSDocTagNode = 289,
-        LastJSDocTagNode = 298
+        LastJSDocTagNode = 298,
+        FirstContextualKeyword = 117,
+        LastContextualKeyword = 145
     }
     enum NodeFlags {
         None = 0,
@@ -419,13 +953,18 @@ declare namespace ts {
         JavaScriptFile = 65536,
         ThisNodeOrAnySubNodesHasError = 131072,
         HasAggregatedChildData = 262144,
+        PossiblyContainsDynamicImport = 524288,
+        PossiblyContainsImportMeta = 1048576,
         JSDoc = 2097152,
+        Ambient = 4194304,
+        InWithStatement = 8388608,
         JsonFile = 16777216,
         BlockScoped = 3,
         ReachabilityCheckFlags = 384,
         ReachabilityAndEmitFlags = 1408,
         ContextFlags = 12679168,
-        TypeExcludesFlags = 20480
+        TypeExcludesFlags = 20480,
+        PermanentlySetIncrementalFlags = 1572864
     }
     enum ModifierFlags {
         None = 0,
@@ -456,21 +995,42 @@ declare namespace ts {
         IntrinsicIndexedElement = 2,
         IntrinsicElement = 3
     }
+    enum RelationComparisonResult {
+        Succeeded = 1,
+        Failed = 2,
+        FailedAndReported = 3
+    }
     interface Node extends TextRange {
         kind: SyntaxKind;
         flags: NodeFlags;
+        modifierFlagsCache?: ModifierFlags;
+        transformFlags: TransformFlags;
         decorators?: NodeArray<Decorator>;
         modifiers?: ModifiersArray;
+        id?: number;
         parent: Node;
+        original?: Node;
+        symbol: Symbol;
+        locals?: SymbolTable;
+        nextContainer?: Node;
+        localSymbol?: Symbol;
+        flowNode?: FlowNode;
+        emitNode?: EmitNode;
+        contextualType?: Type;
+        contextualMapper?: TypeMapper;
     }
     interface JSDocContainer {
+        jsDoc?: JSDoc[];
+        jsDocCache?: ReadonlyArray<JSDocTag>;
     }
     type HasJSDoc = ParameterDeclaration | CallSignatureDeclaration | ConstructSignatureDeclaration | MethodSignature | PropertySignature | ArrowFunction | ParenthesizedExpression | SpreadAssignment | ShorthandPropertyAssignment | PropertyAssignment | FunctionExpression | LabeledStatement | ExpressionStatement | VariableStatement | FunctionDeclaration | ConstructorDeclaration | MethodDeclaration | PropertyDeclaration | AccessorDeclaration | ClassLikeDeclaration | InterfaceDeclaration | TypeAliasDeclaration | EnumMember | EnumDeclaration | ModuleDeclaration | ImportEqualsDeclaration | IndexSignatureDeclaration | FunctionTypeNode | ConstructorTypeNode | JSDocFunctionType | EndOfFileToken;
     type HasType = SignatureDeclaration | VariableDeclaration | ParameterDeclaration | PropertySignature | PropertyDeclaration | TypePredicateNode | ParenthesizedTypeNode | TypeOperatorNode | MappedTypeNode | AssertionExpression | TypeAliasDeclaration | JSDocTypeExpression | JSDocNonNullableType | JSDocNullableType | JSDocOptionalType | JSDocVariadicType;
     type HasInitializer = HasExpressionInitializer | ForStatement | ForInStatement | ForOfStatement | JsxAttribute;
     type HasExpressionInitializer = VariableDeclaration | ParameterDeclaration | BindingElement | PropertySignature | PropertyDeclaration | PropertyAssignment | EnumMember;
+    type MutableNodeArray<T extends Node> = NodeArray<T> & T[];
     interface NodeArray<T extends Node> extends ReadonlyArray<T>, TextRange {
         hasTrailingComma?: boolean;
+        transformFlags: TransformFlags;
     }
     interface Token<TKind extends SyntaxKind> extends Node {
         kind: TKind;
@@ -490,6 +1050,17 @@ declare namespace ts {
     type MinusToken = Token<SyntaxKind.MinusToken>;
     type Modifier = Token<SyntaxKind.AbstractKeyword> | Token<SyntaxKind.AsyncKeyword> | Token<SyntaxKind.ConstKeyword> | Token<SyntaxKind.DeclareKeyword> | Token<SyntaxKind.DefaultKeyword> | Token<SyntaxKind.ExportKeyword> | Token<SyntaxKind.PublicKeyword> | Token<SyntaxKind.PrivateKeyword> | Token<SyntaxKind.ProtectedKeyword> | Token<SyntaxKind.ReadonlyKeyword> | Token<SyntaxKind.StaticKeyword>;
     type ModifiersArray = NodeArray<Modifier>;
+    enum GeneratedIdentifierFlags {
+        None = 0,
+        Auto = 1,
+        Loop = 2,
+        Unique = 3,
+        Node = 4,
+        KindMask = 7,
+        ReservedInNestedScopes = 8,
+        Optimistic = 16,
+        FileLevel = 32
+    }
     interface Identifier extends PrimaryExpression, Declaration {
         kind: SyntaxKind.Identifier;
         /**
@@ -498,15 +1069,23 @@ declare namespace ts {
          */
         escapedText: __String;
         originalKeywordKind?: SyntaxKind;
+        autoGenerateFlags?: GeneratedIdentifierFlags;
+        autoGenerateId?: number;
         isInJSDocNamespace?: boolean;
+        typeArguments?: NodeArray<TypeNode | TypeParameterDeclaration>;
+        jsdocDotPos?: number;
     }
     interface TransientIdentifier extends Identifier {
         resolvedSymbol: Symbol;
     }
+    interface GeneratedIdentifier extends Identifier {
+        autoGenerateFlags: GeneratedIdentifierFlags;
+    }
     interface QualifiedName extends Node {
         kind: SyntaxKind.QualifiedName;
         left: EntityName;
         right: Identifier;
+        jsdocDotPos?: number;
     }
     type EntityName = Identifier | QualifiedName;
     type PropertyName = Identifier | StringLiteral | NumericLiteral | ComputedPropertyName;
@@ -517,6 +1096,12 @@ declare namespace ts {
     interface NamedDeclaration extends Declaration {
         name?: DeclarationName;
     }
+    interface DynamicNamedDeclaration extends NamedDeclaration {
+        name: ComputedPropertyName;
+    }
+    interface LateBoundDeclaration extends DynamicNamedDeclaration {
+        name: LateBoundName;
+    }
     interface DeclarationStatement extends NamedDeclaration, Statement {
         name?: Identifier | StringLiteral | NumericLiteral;
     }
@@ -524,6 +1109,9 @@ declare namespace ts {
         kind: SyntaxKind.ComputedPropertyName;
         expression: Expression;
     }
+    interface LateBoundName extends ComputedPropertyName {
+        expression: EntityNameExpression;
+    }
     interface Decorator extends Node {
         kind: SyntaxKind.Decorator;
         parent: NamedDeclaration;
@@ -543,6 +1131,7 @@ declare namespace ts {
         typeParameters?: NodeArray<TypeParameterDeclaration>;
         parameters: NodeArray<ParameterDeclaration>;
         type?: TypeNode;
+        typeArguments?: NodeArray<TypeNode>;
     }
     type SignatureDeclaration = CallSignatureDeclaration | ConstructSignatureDeclaration | MethodSignature | IndexSignatureDeclaration | FunctionTypeNode | ConstructorTypeNode | JSDocFunctionType | FunctionDeclaration | MethodDeclaration | ConstructorDeclaration | AccessorDeclaration | FunctionExpression | ArrowFunction;
     interface CallSignatureDeclaration extends SignatureDeclarationBase, TypeElement {
@@ -582,6 +1171,7 @@ declare namespace ts {
         name: BindingName;
         initializer?: Expression;
     }
+    type BindingElementGrandparent = BindingElement["parent"]["parent"];
     interface PropertySignature extends TypeElement, JSDocContainer {
         kind: SyntaxKind.PropertySignature;
         name: PropertyName;
@@ -676,6 +1266,7 @@ declare namespace ts {
         kind: SyntaxKind.Constructor;
         parent: ClassLikeDeclaration;
         body?: FunctionBody;
+        returnFlowNode?: FlowNode;
     }
     /** For when we encounter a semicolon in a class declaration. ES6 allows these as class elements. */
     interface SemicolonClassElement extends ClassElement {
@@ -711,6 +1302,11 @@ declare namespace ts {
         argument: TypeNode;
         qualifier?: EntityName;
     }
+    type LiteralImportTypeNode = ImportTypeNode & {
+        argument: LiteralTypeNode & {
+            literal: StringLiteral;
+        };
+    };
     interface ThisTypeNode extends TypeNode {
         kind: SyntaxKind.ThisType;
     }
@@ -784,6 +1380,9 @@ declare namespace ts {
         operator: SyntaxKind.KeyOfKeyword | SyntaxKind.UniqueKeyword;
         type: TypeNode;
     }
+    interface UniqueTypeOperatorNode extends TypeOperatorNode {
+        operator: SyntaxKind.UniqueKeyword;
+    }
     interface IndexedAccessTypeNode extends TypeNode {
         kind: SyntaxKind.IndexedAccessType;
         objectType: TypeNode;
@@ -802,6 +1401,9 @@ declare namespace ts {
     }
     interface StringLiteral extends LiteralExpression {
         kind: SyntaxKind.StringLiteral;
+        textSourceNode?: Identifier | StringLiteralLike | NumericLiteral;
+        /** Note: this is only set when synthesizing a node, not during parsing. */
+        singleQuote?: boolean;
     }
     type StringLiteralLike = StringLiteral | NoSubstitutionTemplateLiteral;
     interface Expression extends Node {
@@ -959,8 +1561,24 @@ declare namespace ts {
     interface NoSubstitutionTemplateLiteral extends LiteralExpression {
         kind: SyntaxKind.NoSubstitutionTemplateLiteral;
     }
+    enum TokenFlags {
+        None = 0,
+        PrecedingLineBreak = 1,
+        PrecedingJSDocComment = 2,
+        Unterminated = 4,
+        ExtendedUnicodeEscape = 8,
+        Scientific = 16,
+        Octal = 32,
+        HexSpecifier = 64,
+        BinarySpecifier = 128,
+        OctalSpecifier = 256,
+        ContainsSeparator = 512,
+        BinaryOrOctalSpecifier = 384,
+        NumericLiteralFlags = 1008
+    }
     interface NumericLiteral extends LiteralExpression {
         kind: SyntaxKind.NumericLiteral;
+        numericLiteralFlags: TokenFlags;
     }
     interface TemplateHead extends LiteralLikeNode {
         kind: SyntaxKind.TemplateHead;
@@ -993,6 +1611,7 @@ declare namespace ts {
     interface ArrayLiteralExpression extends PrimaryExpression {
         kind: SyntaxKind.ArrayLiteralExpression;
         elements: NodeArray<Expression>;
+        multiLine?: boolean;
     }
     interface SpreadElement extends Expression {
         kind: SyntaxKind.SpreadElement;
@@ -1010,6 +1629,7 @@ declare namespace ts {
     }
     interface ObjectLiteralExpression extends ObjectLiteralExpressionBase<ObjectLiteralElementLike> {
         kind: SyntaxKind.ObjectLiteralExpression;
+        multiLine?: boolean;
     }
     type EntityNameExpression = Identifier | PropertyAccessEntityNameExpression;
     type EntityNameOrEntityNameExpression = EntityName | EntityNameExpression;
@@ -1158,6 +1778,12 @@ declare namespace ts {
     interface NotEmittedStatement extends Statement {
         kind: SyntaxKind.NotEmittedStatement;
     }
+    /**
+     * Marks the end of transformed declaration to properly emit exports.
+     */
+    interface EndOfDeclarationMarker extends Statement {
+        kind: SyntaxKind.EndOfDeclarationMarker;
+    }
     /**
      * A list of comma-separated expressions. This node is only created by transformations.
      */
@@ -1165,6 +1791,12 @@ declare namespace ts {
         kind: SyntaxKind.CommaListExpression;
         elements: NodeArray<Expression>;
     }
+    /**
+     * Marks the beginning of a merged transformed declaration.
+     */
+    interface MergeDeclarationMarker extends Statement {
+        kind: SyntaxKind.MergeDeclarationMarker;
+    }
     interface EmptyStatement extends Statement {
         kind: SyntaxKind.EmptyStatement;
     }
@@ -1179,6 +1811,7 @@ declare namespace ts {
     interface Block extends Statement {
         kind: SyntaxKind.Block;
         statements: NodeArray<Statement>;
+        multiLine?: boolean;
     }
     interface VariableStatement extends Statement, JSDocContainer {
         kind: SyntaxKind.VariableStatement;
@@ -1188,6 +1821,9 @@ declare namespace ts {
         kind: SyntaxKind.ExpressionStatement;
         expression: Expression;
     }
+    interface PrologueDirective extends ExpressionStatement {
+        expression: StringLiteral;
+    }
     interface IfStatement extends Statement {
         kind: SyntaxKind.IfStatement;
         expression: Expression;
@@ -1345,6 +1981,9 @@ declare namespace ts {
     }
     type ModuleName = Identifier | StringLiteral;
     type ModuleBody = NamespaceBody | JSDocNamespaceBody;
+    interface AmbientModuleDeclaration extends ModuleDeclaration {
+        body?: ModuleBlock;
+    }
     interface ModuleDeclaration extends DeclarationStatement, JSDocContainer {
         kind: SyntaxKind.ModuleDeclaration;
         parent: ModuleBody | SourceFile;
@@ -1642,12 +2281,36 @@ declare namespace ts {
         path: string;
         name?: string;
     }
+    /**
+     * Subset of properties from SourceFile that are used in multiple utility functions
+     */
+    interface SourceFileLike {
+        readonly text: string;
+        lineMap?: ReadonlyArray<number>;
+    }
+    interface RedirectInfo {
+        /** Source file this redirects to. */
+        readonly redirectTarget: SourceFile;
+        /**
+         * Source file for the duplicate package. This will not be used by the Program,
+         * but we need to keep this around so we can watch for changes in underlying.
+         */
+        readonly unredirected: SourceFile;
+    }
     interface SourceFile extends Declaration {
         kind: SyntaxKind.SourceFile;
         statements: NodeArray<Statement>;
         endOfFileToken: Token<SyntaxKind.EndOfFileToken>;
         fileName: string;
+        path: Path;
         text: string;
+        resolvedPath: Path;
+        /**
+         * If two source files are for the same version of the same package, one will redirect to the other.
+         * (See `createRedirectSourceFile` in program.ts.)
+         * The redirect will have this set. The redirected-to source file will be in `redirectTargetsSet`.
+         */
+        redirectInfo?: RedirectInfo;
         amdDependencies: ReadonlyArray<AmdDependency>;
         moduleName?: string;
         referencedFiles: ReadonlyArray<FileReference>;
@@ -1655,6 +2318,7 @@ declare namespace ts {
         libReferenceDirectives: ReadonlyArray<FileReference>;
         languageVariant: LanguageVariant;
         isDeclarationFile: boolean;
+        renamedDependencies?: ReadonlyMap<string>;
         /**
          * lib.d.ts should have a reference comment like
          *
@@ -1665,11 +2329,49 @@ declare namespace ts {
          */
         hasNoDefaultLib: boolean;
         languageVersion: ScriptTarget;
+        scriptKind: ScriptKind;
+        /**
+         * The first "most obvious" node that makes a file an external module.
+         * This is intended to be the first top-level import/export,
+         * but could be arbitrarily nested (e.g. `import.meta`).
+         */
+        externalModuleIndicator?: Node;
+        commonJsModuleIndicator?: Node;
+        identifiers: Map<string>;
+        nodeCount: number;
+        identifierCount: number;
+        symbolCount: number;
+        parseDiagnostics: DiagnosticWithLocation[];
+        bindDiagnostics: DiagnosticWithLocation[];
+        bindSuggestionDiagnostics?: DiagnosticWithLocation[];
+        jsDocDiagnostics?: DiagnosticWithLocation[];
+        additionalSyntacticDiagnostics?: ReadonlyArray<DiagnosticWithLocation>;
+        lineMap: ReadonlyArray<number>;
+        classifiableNames?: ReadonlyUnderscoreEscapedMap<true>;
+        resolvedModules?: Map<ResolvedModuleFull | undefined>;
+        resolvedTypeReferenceDirectiveNames: Map<ResolvedTypeReferenceDirective>;
+        imports: ReadonlyArray<StringLiteralLike>;
+        /**
+         * When a file's references are redirected due to project reference directives,
+         * the original names of the references are stored in this array
+         */
+        redirectedReferences?: ReadonlyArray<string>;
+        moduleAugmentations: ReadonlyArray<StringLiteral | Identifier>;
+        patternAmbientModules?: PatternAmbientModule[];
+        ambientModuleNames: ReadonlyArray<string>;
+        checkJsDirective?: CheckJsDirective;
+        version: string;
+        pragmas: PragmaMap;
+        localJsxNamespace?: __String;
+        localJsxFactory?: EntityName;
     }
     interface Bundle extends Node {
         kind: SyntaxKind.Bundle;
         prepends: ReadonlyArray<InputFiles | UnparsedSource>;
         sourceFiles: ReadonlyArray<SourceFile>;
+        syntheticFileReferences?: ReadonlyArray<FileReference>;
+        syntheticTypeReferences?: ReadonlyArray<FileReference>;
+        hasNoDefaultLib?: boolean;
     }
     interface InputFiles extends Node {
         kind: SyntaxKind.InputFiles;
@@ -1730,6 +2432,11 @@ declare namespace ts {
          * Get a list of files in the program
          */
         getSourceFiles(): ReadonlyArray<SourceFile>;
+        /**
+         * Get a list of file names that were passed to 'createProgram' or referenced in a
+         * program source file but could not be located.
+         */
+        getMissingFilePaths(): ReadonlyArray<Path>;
         /**
          * Emits the JavaScript and declaration files.  If targetSourceFile is not specified, then
          * the JavaScript and declaration files will be produced for all the files in this program.
@@ -1748,17 +2455,44 @@ declare namespace ts {
         getSemanticDiagnostics(sourceFile?: SourceFile, cancellationToken?: CancellationToken): ReadonlyArray<Diagnostic>;
         getDeclarationDiagnostics(sourceFile?: SourceFile, cancellationToken?: CancellationToken): ReadonlyArray<DiagnosticWithLocation>;
         getConfigFileParsingDiagnostics(): ReadonlyArray<Diagnostic>;
+        getSuggestionDiagnostics(sourceFile: SourceFile, cancellationToken?: CancellationToken): ReadonlyArray<DiagnosticWithLocation>;
         /**
          * Gets a type checker that can be used to semantically analyze source files in the program.
          */
         getTypeChecker(): TypeChecker;
+        getCommonSourceDirectory(): string;
+        getDiagnosticsProducingTypeChecker(): TypeChecker;
+        dropDiagnosticsProducingTypeChecker(): void;
+        getClassifiableNames(): UnderscoreEscapedMap<true>;
+        getNodeCount(): number;
+        getIdentifierCount(): number;
+        getSymbolCount(): number;
+        getTypeCount(): number;
+        getFileProcessingDiagnostics(): DiagnosticCollection;
+        getResolvedTypeReferenceDirectives(): Map<ResolvedTypeReferenceDirective>;
         isSourceFileFromExternalLibrary(file: SourceFile): boolean;
+        isSourceFileDefaultLibrary(file: SourceFile): boolean;
+        structureIsReused?: StructureIsReused;
+        getSourceFileFromReference(referencingFile: SourceFile, ref: FileReference): SourceFile | undefined;
+        getLibFileFromReference(ref: FileReference): SourceFile | undefined;
+        /** Given a source file, get the name of the package it was imported from. */
+        sourceFileToPackageName: Map<string>;
+        /** Set of all source files that some other source file redirects to. */
+        redirectTargetsSet: Map<true>;
+        /** Is the file emitted file */
+        isEmittedFile(file: string): boolean;
+        getResolvedModuleWithFailedLookupLocationsFromCache(moduleName: string, containingFile: string): ResolvedModuleWithFailedLookupLocations | undefined;
         getProjectReferences(): (ResolvedProjectReference | undefined)[] | undefined;
     }
     interface ResolvedProjectReference {
         commandLine: ParsedCommandLine;
         sourceFile: SourceFile;
     }
+    enum StructureIsReused {
+        Not = 0,
+        SafeModules = 1,
+        Completely = 2
+    }
     interface CustomTransformers {
         /** Custom transformers to evaluate before built-in .js transformations. */
         before?: TransformerFactory<SourceFile>[];
@@ -1804,6 +2538,13 @@ declare namespace ts {
         /** Contains declaration emit diagnostics */
         diagnostics: ReadonlyArray<Diagnostic>;
         emittedFiles?: string[];
+        sourceMaps?: SourceMapData[];
+    }
+    interface TypeCheckerHost {
+        getCompilerOptions(): CompilerOptions;
+        getSourceFiles(): ReadonlyArray<SourceFile>;
+        getSourceFile(fileName: string): SourceFile | undefined;
+        getResolvedTypeReferenceDirectives(): ReadonlyMap<ResolvedTypeReferenceDirective>;
     }
     interface TypeChecker {
         getTypeOfSymbolAtLocation(symbol: Symbol, node: Node): Type;
@@ -1817,10 +2558,16 @@ declare namespace ts {
         getBaseTypeOfLiteralType(type: Type): Type;
         getWidenedType(type: Type): Type;
         getReturnTypeOfSignature(signature: Signature): Type;
+        /**
+         * Gets the type of a parameter at a given position in a signature.
+         * Returns `any` if the index is not valid.
+         */
+        getParameterType(signature: Signature, parameterIndex: number): Type;
         getNullableType(type: Type, flags: TypeFlags): Type;
         getNonNullableType(type: Type): Type;
         /** Note that the resulting nodes cannot be checked. */
         typeToTypeNode(type: Type, enclosingDeclaration?: Node, flags?: NodeBuilderFlags): TypeNode | undefined;
+        typeToTypeNode(type: Type, enclosingDeclaration?: Node, flags?: NodeBuilderFlags, tracker?: SymbolTracker): TypeNode | undefined;
         /** Note that the resulting nodes cannot be checked. */
         signatureToSignatureDeclaration(signature: Signature, kind: SyntaxKind, enclosingDeclaration?: Node, flags?: NodeBuilderFlags): (SignatureDeclaration & {
             typeArguments?: NodeArray<TypeNode>;
@@ -1862,6 +2609,10 @@ declare namespace ts {
         typeToString(type: Type, enclosingDeclaration?: Node, flags?: TypeFormatFlags): string;
         symbolToString(symbol: Symbol, enclosingDeclaration?: Node, meaning?: SymbolFlags, flags?: SymbolFormatFlags): string;
         typePredicateToString(predicate: TypePredicate, enclosingDeclaration?: Node, flags?: TypeFormatFlags): string;
+        writeSignature(signature: Signature, enclosingDeclaration?: Node, flags?: TypeFormatFlags, kind?: SignatureKind, writer?: EmitTextWriter): string;
+        writeType(type: Type, enclosingDeclaration?: Node, flags?: TypeFormatFlags, writer?: EmitTextWriter): string;
+        writeSymbol(symbol: Symbol, enclosingDeclaration?: Node, meaning?: SymbolFlags, flags?: SymbolFormatFlags, writer?: EmitTextWriter): string;
+        writeTypePredicate(predicate: TypePredicate, enclosingDeclaration?: Node, flags?: TypeFormatFlags, writer?: EmitTextWriter): string;
         /**
          * @deprecated Use the createX factory functions or XToY typechecker methods and `createPrinter` or the `xToString` methods instead
          * This will be removed in a future version.
@@ -1871,6 +2622,9 @@ declare namespace ts {
         getAugmentedPropertiesOfType(type: Type): Symbol[];
         getRootSymbols(symbol: Symbol): Symbol[];
         getContextualType(node: Expression): Type | undefined;
+        getContextualTypeForArgumentAtIndex(call: CallLikeExpression, argIndex: number): Type | undefined;
+        getContextualTypeForJsxAttribute(attribute: JsxAttribute | JsxSpreadAttribute): Type | undefined;
+        isContextSensitive(node: Expression | MethodDeclaration | ObjectLiteralElementLike | JsxAttributeLike): boolean;
         /**
          * returns unknownSignature in the case of an error.
          * returns undefined if the node is not valid.
@@ -1882,22 +2636,91 @@ declare namespace ts {
         isUndefinedSymbol(symbol: Symbol): boolean;
         isArgumentsSymbol(symbol: Symbol): boolean;
         isUnknownSymbol(symbol: Symbol): boolean;
+        getMergedSymbol(symbol: Symbol): Symbol;
         getConstantValue(node: EnumMember | PropertyAccessExpression | ElementAccessExpression): string | number | undefined;
         isValidPropertyAccess(node: PropertyAccessExpression | QualifiedName | ImportTypeNode, propertyName: string): boolean;
+        /** Exclude accesses to private properties or methods with a `this` parameter that `type` doesn't satisfy. */
+        isValidPropertyAccessForCompletions(node: PropertyAccessExpression | ImportTypeNode, type: Type, property: Symbol): boolean;
         /** Follow all aliases to get the original symbol. */
         getAliasedSymbol(symbol: Symbol): Symbol;
+        /** Follow a *single* alias to get the immediately aliased symbol. */
+        getImmediateAliasedSymbol(symbol: Symbol): Symbol | undefined;
         getExportsOfModule(moduleSymbol: Symbol): Symbol[];
+        /** Unlike `getExportsOfModule`, this includes properties of an `export =` value. */
+        getExportsAndPropertiesOfModule(moduleSymbol: Symbol): Symbol[];
         getAllAttributesTypeFromJsxOpeningLikeElement(elementNode: JsxOpeningLikeElement): Type | undefined;
         getJsxIntrinsicTagNamesAt(location: Node): Symbol[];
         isOptionalParameter(node: ParameterDeclaration): boolean;
         getAmbientModules(): Symbol[];
         tryGetMemberInModuleExports(memberName: string, moduleSymbol: Symbol): Symbol | undefined;
+        /**
+         * Unlike `tryGetMemberInModuleExports`, this includes properties of an `export =` value.
+         * Does *not* return properties of primitive types.
+         */
+        tryGetMemberInModuleExportsAndProperties(memberName: string, moduleSymbol: Symbol): Symbol | undefined;
         getApparentType(type: Type): Type;
         getSuggestionForNonexistentProperty(node: Identifier, containingType: Type): string | undefined;
         getSuggestionForNonexistentSymbol(location: Node, name: string, meaning: SymbolFlags): string | undefined;
         getSuggestionForNonexistentModule(node: Identifier, target: Symbol): string | undefined;
         getBaseConstraintOfType(type: Type): Type | undefined;
         getDefaultFromTypeParameter(type: Type): Type | undefined;
+        getAnyType(): Type;
+        getStringType(): Type;
+        getNumberType(): Type;
+        getBooleanType(): Type;
+        getFalseType(): Type;
+        getTrueType(): Type;
+        getVoidType(): Type;
+        getUndefinedType(): Type;
+        getNullType(): Type;
+        getESSymbolType(): Type;
+        getNeverType(): Type;
+        getUnionType(types: Type[], subtypeReduction?: UnionReduction): Type;
+        createArrayType(elementType: Type): Type;
+        createPromiseType(type: Type): Type;
+        createAnonymousType(symbol: Symbol, members: SymbolTable, callSignatures: Signature[], constructSignatures: Signature[], stringIndexInfo: IndexInfo | undefined, numberIndexInfo: IndexInfo | undefined): Type;
+        createSignature(declaration: SignatureDeclaration, typeParameters: TypeParameter[] | undefined, thisParameter: Symbol | undefined, parameters: Symbol[], resolvedReturnType: Type, typePredicate: TypePredicate | undefined, minArgumentCount: number, hasRestParameter: boolean, hasLiteralTypes: boolean): Signature;
+        createSymbol(flags: SymbolFlags, name: __String): TransientSymbol;
+        createIndexInfo(type: Type, isReadonly: boolean, declaration?: SignatureDeclaration): IndexInfo;
+        isSymbolAccessible(symbol: Symbol, enclosingDeclaration: Node | undefined, meaning: SymbolFlags, shouldComputeAliasToMarkVisible: boolean): SymbolAccessibilityResult;
+        tryFindAmbientModuleWithoutAugmentations(moduleName: string): Symbol | undefined;
+        getSymbolWalker(accept?: (symbol: Symbol) => boolean): SymbolWalker;
+        getDiagnostics(sourceFile?: SourceFile, cancellationToken?: CancellationToken): Diagnostic[];
+        getGlobalDiagnostics(): Diagnostic[];
+        getEmitResolver(sourceFile?: SourceFile, cancellationToken?: CancellationToken): EmitResolver;
+        getNodeCount(): number;
+        getIdentifierCount(): number;
+        getSymbolCount(): number;
+        getTypeCount(): number;
+        isArrayLikeType(type: Type): boolean;
+        /**
+         * For a union, will include a property if it's defined in *any* of the member types.
+         * So for `{ a } | { b }`, this will include both `a` and `b`.
+         * Does not include properties of primitive types.
+         */
+        getAllPossiblePropertiesOfTypes(type: ReadonlyArray<Type>): Symbol[];
+        resolveName(name: string, location: Node, meaning: SymbolFlags, excludeGlobals: boolean): Symbol | undefined;
+        getJsxNamespace(location?: Node): string;
+        /**
+         * Note that this will return undefined in the following case:
+         *     // a.ts
+         *     export namespace N { export class C { } }
+         *     // b.ts
+         *     <<enclosingDeclaration>>
+         * Where `C` is the symbol we're looking for.
+         * This should be called in a loop climbing parents of the symbol, so we'll get `N`.
+         */
+        getAccessibleSymbolChain(symbol: Symbol, enclosingDeclaration: Node | undefined, meaning: SymbolFlags, useOnlyExternalAliasing: boolean): Symbol[] | undefined;
+        getTypePredicateOfSignature(signature: Signature): TypePredicate;
+        resolveExternalModuleSymbol(symbol: Symbol): Symbol;
+        /** @param node A location where we might consider accessing `this`. Not necessarily a ThisExpression. */
+        tryGetThisTypeAt(node: Node): Type | undefined;
+        getTypeArgumentConstraint(node: TypeNode): Type | undefined;
+        /**
+         * Does *not* get *all* suggestion diagnostics, just the ones that were convenient to report in the checker.
+         * Others are added in computeSuggestionDiagnostics.
+         */
+        getSuggestionDiagnostics(file: SourceFile, cancellationToken?: CancellationToken): ReadonlyArray<DiagnosticWithLocation>;
         /**
          * Depending on the operation performed, it may be appropriate to throw away the checker
          * if the cancellation token is triggered. Typically, if it is used for error checking
@@ -1905,6 +2728,11 @@ declare namespace ts {
          */
         runWithCancellationToken<T>(token: CancellationToken, cb: (checker: TypeChecker) => T): T;
     }
+    enum UnionReduction {
+        None = 0,
+        Literal = 1,
+        Subtype = 2
+    }
     enum NodeBuilderFlags {
         None = 0,
         NoTruncation = 1,
@@ -1965,6 +2793,18 @@ declare namespace ts {
         AllowAnyNodeKind = 4,
         UseAliasDefinedOutsideCurrentScope = 8
     }
+    interface SymbolWalker {
+        /** Note: Return values are not ordered. */
+        walkType(root: Type): {
+            visitedTypes: ReadonlyArray<Type>;
+            visitedSymbols: ReadonlyArray<Symbol>;
+        };
+        /** Note: Return values are not ordered. */
+        walkSymbol(root: Symbol): {
+            visitedTypes: ReadonlyArray<Type>;
+            visitedSymbols: ReadonlyArray<Symbol>;
+        };
+    }
     /**
      * @deprecated
      */
@@ -1998,6 +2838,15 @@ declare namespace ts {
         decreaseIndent(): void;
         clear(): void;
     }
+    enum SymbolAccessibility {
+        Accessible = 0,
+        NotAccessible = 1,
+        CannotBeNamed = 2
+    }
+    enum SyntheticSymbolKind {
+        UnionOrIntersection = 0,
+        Spread = 1
+    }
     enum TypePredicateKind {
         This = 0,
         Identifier = 1
@@ -2015,6 +2864,88 @@ declare namespace ts {
         parameterIndex: number;
     }
     type TypePredicate = IdentifierTypePredicate | ThisTypePredicate;
+    type AnyImportSyntax = ImportDeclaration | ImportEqualsDeclaration;
+    type AnyImportOrReExport = AnyImportSyntax | ExportDeclaration;
+    interface ValidImportTypeNode extends ImportTypeNode {
+        argument: LiteralTypeNode & {
+            literal: StringLiteral;
+        };
+    }
+    type AnyValidImportOrReExport = (ImportDeclaration | ExportDeclaration) & {
+        moduleSpecifier: StringLiteral;
+    } | ImportEqualsDeclaration & {
+        moduleReference: ExternalModuleReference & {
+            expression: StringLiteral;
+        };
+    } | RequireOrImportCall | ValidImportTypeNode;
+    type RequireOrImportCall = CallExpression & {
+        arguments: [StringLiteralLike];
+    };
+    type LateVisibilityPaintedStatement = AnyImportSyntax | VariableStatement | ClassDeclaration | FunctionDeclaration | ModuleDeclaration | TypeAliasDeclaration | InterfaceDeclaration | EnumDeclaration;
+    interface SymbolVisibilityResult {
+        accessibility: SymbolAccessibility;
+        aliasesToMakeVisible?: LateVisibilityPaintedStatement[];
+        errorSymbolName?: string;
+        errorNode?: Node;
+    }
+    interface SymbolAccessibilityResult extends SymbolVisibilityResult {
+        errorModuleName?: string;
+    }
+    interface AllAccessorDeclarations {
+        firstAccessor: AccessorDeclaration;
+        secondAccessor: AccessorDeclaration | undefined;
+        getAccessor: AccessorDeclaration | undefined;
+        setAccessor: AccessorDeclaration | undefined;
+    }
+    /** Indicates how to serialize the name for a TypeReferenceNode when emitting decorator metadata */
+    enum TypeReferenceSerializationKind {
+        Unknown = 0,
+        TypeWithConstructSignatureAndValue = 1,
+        VoidNullableOrNeverType = 2,
+        NumberLikeType = 3,
+        StringLikeType = 4,
+        BooleanType = 5,
+        ArrayLikeType = 6,
+        ESSymbolType = 7,
+        Promise = 8,
+        TypeWithCallSignature = 9,
+        ObjectType = 10
+    }
+    interface EmitResolver {
+        hasGlobalName(name: string): boolean;
+        getReferencedExportContainer(node: Identifier, prefixLocals?: boolean): SourceFile | ModuleDeclaration | EnumDeclaration | undefined;
+        getReferencedImportDeclaration(node: Identifier): Declaration | undefined;
+        getReferencedDeclarationWithCollidingName(node: Identifier): Declaration | undefined;
+        isDeclarationWithCollidingName(node: Declaration): boolean;
+        isValueAliasDeclaration(node: Node): boolean;
+        isReferencedAliasDeclaration(node: Node, checkChildren?: boolean): boolean;
+        isTopLevelValueImportEqualsWithEntityName(node: ImportEqualsDeclaration): boolean;
+        getNodeCheckFlags(node: Node): NodeCheckFlags;
+        isDeclarationVisible(node: Declaration | AnyImportSyntax): boolean;
+        isLateBound(node: Declaration): node is LateBoundDeclaration;
+        collectLinkedAliases(node: Identifier): Node[] | undefined;
+        isImplementationOfOverload(node: FunctionLike): boolean | undefined;
+        isRequiredInitializedParameter(node: ParameterDeclaration): boolean;
+        isOptionalUninitializedParameterProperty(node: ParameterDeclaration): boolean;
+        createTypeOfDeclaration(declaration: AccessorDeclaration | VariableLikeDeclaration, enclosingDeclaration: Node, flags: NodeBuilderFlags, tracker: SymbolTracker, addUndefined?: boolean): TypeNode | undefined;
+        createReturnTypeOfSignatureDeclaration(signatureDeclaration: SignatureDeclaration, enclosingDeclaration: Node, flags: NodeBuilderFlags, tracker: SymbolTracker): TypeNode | undefined;
+        createTypeOfExpression(expr: Expression, enclosingDeclaration: Node, flags: NodeBuilderFlags, tracker: SymbolTracker): TypeNode | undefined;
+        createLiteralConstValue(node: VariableDeclaration | PropertyDeclaration | PropertySignature | ParameterDeclaration): Expression;
+        isSymbolAccessible(symbol: Symbol, enclosingDeclaration: Node | undefined, meaning: SymbolFlags | undefined, shouldComputeAliasToMarkVisible: boolean): SymbolAccessibilityResult;
+        isEntityNameVisible(entityName: EntityNameOrEntityNameExpression, enclosingDeclaration: Node): SymbolVisibilityResult;
+        getConstantValue(node: EnumMember | PropertyAccessExpression | ElementAccessExpression): string | number | undefined;
+        getReferencedValueDeclaration(reference: Identifier): Declaration | undefined;
+        getTypeReferenceSerializationKind(typeName: EntityName, location?: Node): TypeReferenceSerializationKind;
+        isOptionalParameter(node: ParameterDeclaration): boolean;
+        moduleExportsSomeValue(moduleReferenceExpression: Expression): boolean;
+        isArgumentsLocalBinding(node: Identifier): boolean;
+        getExternalModuleFileFromDeclaration(declaration: ImportEqualsDeclaration | ImportDeclaration | ExportDeclaration | ModuleDeclaration | ImportTypeNode): SourceFile | undefined;
+        getTypeReferenceDirectivesForEntityName(name: EntityNameOrEntityNameExpression): string[] | undefined;
+        getTypeReferenceDirectivesForSymbol(symbol: Symbol, meaning?: SymbolFlags): string[] | undefined;
+        isLiteralConstDeclaration(node: VariableDeclaration | PropertyDeclaration | PropertySignature | ParameterDeclaration): boolean;
+        getJsxFactoryEntity(location?: Node): EntityName | undefined;
+        getAllAccessorDeclarations(declaration: AccessorDeclaration): AllAccessorDeclarations;
+    }
     enum SymbolFlags {
         None = 0,
         FunctionScopedVariable = 1,
@@ -2044,6 +2975,7 @@ declare namespace ts {
         Optional = 16777216,
         Transient = 33554432,
         JSContainer = 67108864,
+        All = 67108863,
         Enum = 384,
         Variable = 3,
         Value = 67216319,
@@ -2071,11 +3003,13 @@ declare namespace ts {
         AliasExcludes = 2097152,
         ModuleMember = 2623475,
         ExportHasLocal = 944,
-        HasExports = 1952,
+        HasExports = 1955,
         HasMembers = 6240,
         BlockScoped = 418,
         PropertyOrAccessor = 98308,
-        ClassMember = 106500
+        ClassMember = 106500,
+        Classifiable = 2885600,
+        LateBindingContainer = 6240
     }
     interface Symbol {
         flags: SymbolFlags;
@@ -2085,6 +3019,70 @@ declare namespace ts {
         members?: SymbolTable;
         exports?: SymbolTable;
         globalExports?: SymbolTable;
+        id?: number;
+        mergeId?: number;
+        parent?: Symbol;
+        exportSymbol?: Symbol;
+        nameType?: Type;
+        constEnumOnlyModule?: boolean;
+        isReferenced?: SymbolFlags;
+        isReplaceableByMethod?: boolean;
+        isAssigned?: boolean;
+    }
+    interface SymbolLinks {
+        immediateTarget?: Symbol;
+        target?: Symbol;
+        type?: Type;
+        uniqueESSymbolType?: Type;
+        declaredType?: Type;
+        typeParameters?: TypeParameter[];
+        outerTypeParameters?: TypeParameter[];
+        inferredClassType?: Type;
+        instantiations?: Map<Type>;
+        mapper?: TypeMapper;
+        referenced?: boolean;
+        containingType?: UnionOrIntersectionType;
+        leftSpread?: Symbol;
+        rightSpread?: Symbol;
+        syntheticOrigin?: Symbol;
+        isDiscriminantProperty?: boolean;
+        resolvedExports?: SymbolTable;
+        resolvedMembers?: SymbolTable;
+        exportsChecked?: boolean;
+        typeParametersChecked?: boolean;
+        isDeclarationWithCollidingName?: boolean;
+        bindingElement?: BindingElement;
+        exportsSomeValue?: boolean;
+        enumKind?: EnumKind;
+        originatingImport?: ImportDeclaration | ImportCall;
+        lateSymbol?: Symbol;
+    }
+    enum EnumKind {
+        Numeric = 0,
+        Literal = 1
+    }
+    enum CheckFlags {
+        Instantiated = 1,
+        SyntheticProperty = 2,
+        SyntheticMethod = 4,
+        Readonly = 8,
+        Partial = 16,
+        HasNonUniformType = 32,
+        ContainsPublic = 64,
+        ContainsProtected = 128,
+        ContainsPrivate = 256,
+        ContainsStatic = 512,
+        Late = 1024,
+        ReverseMapped = 2048,
+        Synthetic = 6
+    }
+    interface TransientSymbol extends Symbol, SymbolLinks {
+        checkFlags: CheckFlags;
+        isRestParameter?: boolean;
+    }
+    interface ReverseMappedSymbol extends TransientSymbol {
+        propertyType: Type;
+        mappedType: MappedType;
     }
     enum InternalSymbolName {
         Call = "__call",
@@ -2135,6 +3133,53 @@ declare namespace ts {
     }
     /** SymbolTable based on ES6 Map interface. */
     type SymbolTable = UnderscoreEscapedMap<Symbol>;
+    /** Used to track a `declare module "foo*"`-like declaration. */
+    interface PatternAmbientModule {
+        pattern: Pattern;
+        symbol: Symbol;
+    }
+    enum NodeCheckFlags {
+        TypeChecked = 1,
+        LexicalThis = 2,
+        CaptureThis = 4,
+        CaptureNewTarget = 8,
+        SuperInstance = 256,
+        SuperStatic = 512,
+        ContextChecked = 1024,
+        AsyncMethodWithSuper = 2048,
+        AsyncMethodWithSuperBinding = 4096,
+        CaptureArguments = 8192,
+        EnumValuesComputed = 16384,
+        LexicalModuleMergesWithClass = 32768,
+        LoopWithCapturedBlockScopedBinding = 65536,
+        CapturedBlockScopedBinding = 131072,
+        BlockScopedBindingInLoop = 262144,
+        ClassWithBodyScopedClassBinding = 524288,
+        BodyScopedClassBinding = 1048576,
+        NeedsLoopOutParameter = 2097152,
+        AssignmentsMarked = 4194304,
+        ClassWithConstructorReference = 8388608,
+        ConstructorReferenceInClass = 16777216
+    }
+    interface NodeLinks {
+        flags: NodeCheckFlags;
+        resolvedType?: Type;
+        resolvedSignature?: Signature;
+        resolvedSignatures?: Map<Signature[]>;
+        resolvedSymbol?: Symbol;
+        resolvedIndexInfo?: IndexInfo;
+        maybeTypePredicate?: boolean;
+        enumMemberValue?: string | number;
+        isVisible?: boolean;
+        containsArgumentsReference?: boolean;
+        hasReportedStatementInAmbientContext?: boolean;
+        jsxFlags: JsxFlags;
+        resolvedJsxElementAttributesType?: Type;
+        resolvedJsxElementAllAttributesType?: Type;
+        hasSuperCall?: boolean;
+        superCall?: SuperCall;
+        switchTypes?: Type[];
+    }
     enum TypeFlags {
         Any = 1,
         Unknown = 2,
@@ -2161,16 +3206,28 @@ declare namespace ts {
         Conditional = 4194304,
         Substitution = 8388608,
         NonPrimitive = 16777216,
+        FreshLiteral = 33554432,
+        UnionOfUnitTypes = 67108864,
+        ContainsWideningType = 134217728,
+        ContainsObjectLiteral = 268435456,
+        ContainsAnyFunctionType = 536870912,
+        AnyOrUnknown = 3,
+        Nullable = 24576,
         Literal = 448,
         Unit = 27072,
         StringOrNumberLiteral = 192,
+        StringOrNumberLiteralOrUnique = 2240,
+        DefinitelyFalsy = 29120,
         PossiblyFalsy = 29148,
+        Intrinsic = 16839967,
+        Primitive = 32764,
         StringLike = 68,
         NumberLike = 168,
         BooleanLike = 272,
         EnumLike = 544,
         ESSymbolLike = 3072,
         VoidLike = 12288,
+        DisjointDomains = 16809468,
         UnionOrIntersection = 786432,
         StructuredType = 917504,
         TypeVariable = 2162688,
@@ -2179,15 +3236,29 @@ declare namespace ts {
         Instantiable = 15794176,
         StructuredOrInstantiable = 16711680,
         Narrowable = 33492479,
-        NotUnionOrUnit = 16909315
+        NotUnionOrUnit = 16909315,
+        NotUnit = 16749629,
+        RequiresWidening = 402653184,
+        PropagatingFlags = 939524096,
+        NonWideningType = 134217728,
+        Wildcard = 268435456,
+        EmptyObject = 536870912,
+        ConstructionFlags = 939524096,
+        GenericMappedType = 134217728
     }
     type DestructuringPattern = BindingPattern | ObjectLiteralExpression | ArrayLiteralExpression;
     interface Type {
         flags: TypeFlags;
+        id: number;
+        checker: TypeChecker;
         symbol: Symbol;
         pattern?: DestructuringPattern;
         aliasSymbol?: Symbol;
         aliasTypeArguments?: Type[];
+        wildcardInstantiation?: Type;
+    }
+    interface IntrinsicType extends Type {
+        intrinsicName: string;
     }
     interface LiteralType extends Type {
         value: string | number;
@@ -2231,6 +3302,8 @@ declare namespace ts {
         outerTypeParameters: TypeParameter[] | undefined;
         localTypeParameters: TypeParameter[] | undefined;
         thisType: TypeParameter | undefined;
+        resolvedBaseConstructorType?: Type;
+        resolvedBaseTypes: BaseType[];
     }
     type BaseType = ObjectType | IntersectionType;
     interface InterfaceTypeWithDeclaredMembers extends InterfaceType {
@@ -2254,23 +3327,89 @@ declare namespace ts {
         target: GenericType;
         typeArguments?: Type[];
     }
+    enum Variance {
+        Invariant = 0,
+        Covariant = 1,
+        Contravariant = 2,
+        Bivariant = 3,
+        Independent = 4
+    }
     interface GenericType extends InterfaceType, TypeReference {
+        instantiations: Map<TypeReference>;
+        variances?: Variance[];
     }
     interface UnionOrIntersectionType extends Type {
         types: Type[];
+        propertyCache: SymbolTable;
+        resolvedProperties: Symbol[];
+        resolvedIndexType: IndexType;
+        resolvedStringIndexType: IndexType;
+        resolvedBaseConstraint: Type;
+        couldContainTypeVariables: boolean;
     }
     interface UnionType extends UnionOrIntersectionType {
     }
     interface IntersectionType extends UnionOrIntersectionType {
+        resolvedApparentType: Type;
     }
     type StructuredType = ObjectType | UnionType | IntersectionType;
+    interface AnonymousType extends ObjectType {
+        target?: AnonymousType;
+        mapper?: TypeMapper;
+    }
+    interface MappedType extends AnonymousType {
+        declaration: MappedTypeNode;
+        typeParameter?: TypeParameter;
+        constraintType?: Type;
+        templateType?: Type;
+        modifiersType?: Type;
+    }
     interface EvolvingArrayType extends ObjectType {
         elementType: Type;
         finalArrayType?: Type;
     }
+    interface ReverseMappedType extends ObjectType {
+        source: Type;
+        mappedType: MappedType;
+    }
+    interface ResolvedType extends ObjectType, UnionOrIntersectionType {
+        members: SymbolTable;
+        properties: Symbol[];
+        callSignatures: Signature[];
+        constructSignatures: Signature[];
+        stringIndexInfo?: IndexInfo;
+        numberIndexInfo?: IndexInfo;
+    }
+    interface FreshObjectLiteralType extends ResolvedType {
+        regularType: ResolvedType;
+    }
+    interface IterableOrIteratorType extends ObjectType, UnionType {
+        iteratedTypeOfIterable?: Type;
+        iteratedTypeOfIterator?: Type;
+        iteratedTypeOfAsyncIterable?: Type;
+        iteratedTypeOfAsyncIterator?: Type;
+    }
+    interface PromiseOrAwaitableType extends ObjectType, UnionType {
+        promiseTypeOfPromiseConstructor?: Type;
+        promisedTypeOfPromise?: Type;
+        awaitedTypeOfType?: Type;
+    }
+    interface SyntheticDefaultModuleType extends Type {
+        syntheticType?: Type;
+    }
     interface InstantiableType extends Type {
+        resolvedBaseConstraint?: Type;
+        resolvedIndexType?: IndexType;
+        resolvedStringIndexType?: IndexType;
     }
     interface TypeParameter extends InstantiableType {
+        /** Retrieve using getConstraintFromTypeParameter */
+        constraint?: Type;
+        default?: Type;
+        target?: TypeParameter;
+        mapper?: TypeMapper;
+        isThisType?: boolean;
+        resolvedDefaultType?: Type;
     }
     interface IndexedAccessType extends InstantiableType {
         objectType: Type;
@@ -2281,6 +3420,7 @@ declare namespace ts {
     type TypeVariable = TypeParameter | IndexedAccessType;
     interface IndexType extends InstantiableType {
         type: InstantiableType | UnionOrIntersectionType;
+        stringsOnly: boolean;
     }
     interface ConditionalRoot {
         node: ConditionalTypeNode;
@@ -2301,6 +3441,9 @@ declare namespace ts {
         extendsType: Type;
         resolvedTrueType?: Type;
         resolvedFalseType?: Type;
+        resolvedDefaultConstraint?: Type;
+        mapper?: TypeMapper;
+        combinedMapper?: TypeMapper;
     }
     interface SubstitutionType extends InstantiableType {
         typeVariable: TypeVariable;
@@ -2314,6 +3457,19 @@ declare namespace ts {
         declaration?: SignatureDeclaration | JSDocSignature;
         typeParameters?: TypeParameter[];
         parameters: Symbol[];
+        thisParameter?: Symbol;
+        resolvedReturnType?: Type;
+        resolvedTypePredicate?: TypePredicate;
+        minArgumentCount: number;
+        hasRestParameter: boolean;
+        hasLiteralTypes: boolean;
+        target?: Signature;
+        mapper?: TypeMapper;
+        unionSignatures?: Signature[];
+        erasedSignatureCache?: Signature;
+        canonicalSignatureCache?: Signature;
+        isolatedSignatureType?: ObjectType;
+        instantiations?: Map<Signature>;
     }
     enum IndexKind {
         String = 0,
@@ -2324,6 +3480,7 @@ declare namespace ts {
         isReadonly: boolean;
         declaration?: IndexSignatureDeclaration;
     }
+    type TypeMapper = (t: TypeParameter) => Type;
     enum InferencePriority {
         NakedTypeVariable = 1,
         HomomorphicMappedType = 2,
@@ -2334,6 +3491,58 @@ declare namespace ts {
         AlwaysStrict = 64,
         PriorityImpliesCombination = 28
     }
+    interface InferenceInfo {
+        typeParameter: TypeParameter;
+        candidates: Type[] | undefined;
+        contraCandidates: Type[] | undefined;
+        inferredType?: Type;
+        priority?: InferencePriority;
+        topLevel: boolean;
+        isFixed: boolean;
+    }
+    enum InferenceFlags {
+        None = 0,
+        InferUnionTypes = 1,
+        NoDefault = 2,
+        AnyDefault = 4
+    }
+    /**
+     * Ternary values are defined such that
+     * x & y is False if either x or y is False.
+     * x & y is Maybe if either x or y is Maybe, but neither x or y is False.
+     * x & y is True if both x and y are True.
+     * x | y is False if both x and y are False.
+     * x | y is Maybe if either x or y is Maybe, but neither x or y is True.
+     * x | y is True if either x or y is True.
+     */
+    enum Ternary {
+        False = 0,
+        Maybe = 1,
+        True = -1
+    }
+    type TypeComparer = (s: Type, t: Type, reportErrors?: boolean) => Ternary;
+    interface InferenceContext extends TypeMapper {
+        typeParameters: TypeParameter[];
+        signature?: Signature;
+        inferences: InferenceInfo[];
+        flags: InferenceFlags;
+        compareTypes: TypeComparer;
+    }
+    interface WideningContext {
+        parent?: WideningContext;
+        propertyName?: __String;
+        siblings?: Type[];
+        resolvedProperties?: Symbol[];
+    }
+    enum SpecialPropertyAssignmentKind {
+        None = 0,
+        ExportsProperty = 1,
+        ModuleExports = 2,
+        PrototypeProperty = 3,
+        ThisProperty = 4,
+        Property = 5,
+        Prototype = 6
+    }
     /** @deprecated Use FileExtensionInfo instead. */
     type JsFileExtensionInfo = FileExtensionInfo;
     interface FileExtensionInfo {
@@ -2382,6 +3591,9 @@ declare namespace ts {
         Suggestion = 2,
         Message = 3
     }
+    function diagnosticCategoryName(d: {
+        category: DiagnosticCategory;
+    }, lowerCase?: boolean): string;
     enum ModuleResolutionKind {
         Classic = 1,
         NodeJs = 2
@@ -2401,31 +3613,44 @@ declare namespace ts {
     }
     type CompilerOptionsValue = string | number | boolean | (string | number)[] | string[] | MapLike<string[]> | PluginImport[] | ProjectReference[] | null | undefined;
     interface CompilerOptions {
+        all?: boolean;
         allowJs?: boolean;
+        allowNonTsExtensions?: boolean;
         allowSyntheticDefaultImports?: boolean;
         allowUnreachableCode?: boolean;
         allowUnusedLabels?: boolean;
         alwaysStrict?: boolean;
         baseUrl?: string;
+        /** An error if set - this should only go through the -b pipeline and not actually be observed */
+        build?: boolean;
         charset?: string;
         checkJs?: boolean;
+        configFilePath?: string;
+        /** configFile is set as non enumerable property so as to avoid checking of json source files */
+        readonly configFile?: TsConfigSourceFile;
         declaration?: boolean;
         declarationMap?: boolean;
         emitDeclarationOnly?: boolean;
         declarationDir?: string;
+        diagnostics?: boolean;
+        extendedDiagnostics?: boolean;
         disableSizeLimit?: boolean;
         downlevelIteration?: boolean;
         emitBOM?: boolean;
         emitDecoratorMetadata?: boolean;
         experimentalDecorators?: boolean;
         forceConsistentCasingInFileNames?: boolean;
+        help?: boolean;
         importHelpers?: boolean;
+        init?: boolean;
         inlineSourceMap?: boolean;
         inlineSources?: boolean;
         isolatedModules?: boolean;
         jsx?: JsxEmit;
         keyofStringsOnly?: boolean;
         lib?: string[];
+        listEmittedFiles?: boolean;
+        listFiles?: boolean;
         locale?: string;
         mapRoot?: string;
         maxNodeModuleJsDepth?: number;
@@ -2433,6 +3658,7 @@ declare namespace ts {
         moduleResolution?: ModuleResolutionKind;
         newLine?: NewLineKind;
         noEmit?: boolean;
+        noEmitForJsFiles?: boolean;
         noEmitHelpers?: boolean;
         noEmitOnError?: boolean;
         noErrorTruncation?: boolean;
@@ -2450,9 +3676,12 @@ declare namespace ts {
         outDir?: string;
         outFile?: string;
         paths?: MapLike<string[]>;
+        plugins?: PluginImport[];
         preserveConstEnums?: boolean;
         preserveSymlinks?: boolean;
+        preserveWatchOutput?: boolean;
         project?: string;
+        pretty?: boolean;
         reactNamespace?: string;
         jsxFactory?: string;
         composite?: boolean;
@@ -2467,14 +3696,18 @@ declare namespace ts {
         strictFunctionTypes?: boolean;
         strictNullChecks?: boolean;
         strictPropertyInitialization?: boolean;
+        stripInternal?: boolean;
         suppressExcessPropertyErrors?: boolean;
         suppressImplicitAnyIndexErrors?: boolean;
+        suppressOutputPathCheck?: boolean;
         target?: ScriptTarget;
         traceResolution?: boolean;
         resolveJsonModule?: boolean;
         types?: string[];
         /** Paths used to compute primary types search locations */
         typeRoots?: string[];
+        version?: boolean;
+        watch?: boolean;
         esModuleInterop?: boolean;
         [option: string]: CompilerOptionsValue | TsConfigSourceFile | undefined;
     }
@@ -2548,15 +3781,32 @@ declare namespace ts {
         errors: Diagnostic[];
         wildcardDirectories?: MapLike<WatchDirectoryFlags>;
         compileOnSave?: boolean;
+        configFileSpecs?: ConfigFileSpecs;
     }
     enum WatchDirectoryFlags {
         None = 0,
         Recursive = 1
     }
+    interface ConfigFileSpecs {
+        filesSpecs: ReadonlyArray<string> | undefined;
+        referencesSpecs: ReadonlyArray<ProjectReference> | undefined;
+        /**
+         * Present to report errors (user specified specs), validatedIncludeSpecs are used for file name matching
+         */
+        includeSpecs?: ReadonlyArray<string>;
+        /**
+         * Present to report errors (user specified specs), validatedExcludeSpecs are used for file name matching
+         */
+        excludeSpecs?: ReadonlyArray<string>;
+        validatedIncludeSpecs?: ReadonlyArray<string>;
+        validatedExcludeSpecs?: ReadonlyArray<string>;
+        wildcardDirectories: MapLike<WatchDirectoryFlags>;
+    }
     interface ExpandResult {
         fileNames: string[];
         projectReferences: ReadonlyArray<ProjectReference> | undefined;
         wildcardDirectories: MapLike<WatchDirectoryFlags>;
+        spec: ConfigFileSpecs;
     }
     interface CreateProgramOptions {
         rootNames: ReadonlyArray<string>;
@@ -2566,6 +3816,160 @@ declare namespace ts {
         oldProgram?: Program;
         configFileParsingDiagnostics?: ReadonlyArray<Diagnostic>;
     }
+    interface CommandLineOptionBase {
+        name: string;
+        type: "string" | "number" | "boolean" | "object" | "list" | Map<number | string>;
+        isFilePath?: boolean;
+        shortName?: string;
+        description?: DiagnosticMessage;
+        paramType?: DiagnosticMessage;
+        isTSConfigOnly?: boolean;
+        isCommandLineOnly?: boolean;
+        showInSimplifiedHelpView?: boolean;
+        category?: DiagnosticMessage;
+    }
+    interface CommandLineOptionOfPrimitiveType extends CommandLineOptionBase {
+        type: "string" | "number" | "boolean";
+    }
+    interface CommandLineOptionOfCustomType extends CommandLineOptionBase {
+        type: Map<number | string>;
+    }
+    interface TsConfigOnlyOption extends CommandLineOptionBase {
+        type: "object";
+        elementOptions?: Map<CommandLineOption>;
+        extraKeyDiagnosticMessage?: DiagnosticMessage;
+    }
+    interface CommandLineOptionOfListType extends CommandLineOptionBase {
+        type: "list";
+        element: CommandLineOptionOfCustomType | CommandLineOptionOfPrimitiveType | TsConfigOnlyOption;
+    }
+    type CommandLineOption = CommandLineOptionOfCustomType | CommandLineOptionOfPrimitiveType | TsConfigOnlyOption | CommandLineOptionOfListType;
+    enum CharacterCodes {
+        nullCharacter = 0,
+        maxAsciiCharacter = 127,
+        lineFeed = 10,
+        carriageReturn = 13,
+        lineSeparator = 8232,
+        paragraphSeparator = 8233,
+        nextLine = 133,
+        space = 32,
+        nonBreakingSpace = 160,
+        enQuad = 8192,
+        emQuad = 8193,
+        enSpace = 8194,
+        emSpace = 8195,
+        threePerEmSpace = 8196,
+        fourPerEmSpace = 8197,
+        sixPerEmSpace = 8198,
+        figureSpace = 8199,
+        punctuationSpace = 8200,
+        thinSpace = 8201,
+        hairSpace = 8202,
+        zeroWidthSpace = 8203,
+        narrowNoBreakSpace = 8239,
+        ideographicSpace = 12288,
+        mathematicalSpace = 8287,
+        ogham = 5760,
+        _ = 95,
+        $ = 36,
+        _0 = 48,
+        _1 = 49,
+        _2 = 50,
+        _3 = 51,
+        _4 = 52,
+        _5 = 53,
+        _6 = 54,
+        _7 = 55,
+        _8 = 56,
+        _9 = 57,
+        a = 97,
+        b = 98,
+        c = 99,
+        d = 100,
+        e = 101,
+        f = 102,
+        g = 103,
+        h = 104,
+        i = 105,
+        j = 106,
+        k = 107,
+        l = 108,
+        m = 109,
+        n = 110,
+        o = 111,
+        p = 112,
+        q = 113,
+        r = 114,
+        s = 115,
+        t = 116,
+        u = 117,
+        v = 118,
+        w = 119,
+        x = 120,
+        y = 121,
+        z = 122,
+        A = 65,
+        B = 66,
+        C = 67,
+        D = 68,
+        E = 69,
+        F = 70,
+        G = 71,
+        H = 72,
+        I = 73,
+        J = 74,
+        K = 75,
+        L = 76,
+        M = 77,
+        N = 78,
+        O = 79,
+        P = 80,
+        Q = 81,
+        R = 82,
+        S = 83,
+        T = 84,
+        U = 85,
+        V = 86,
+        W = 87,
+        X = 88,
+        Y = 89,
+        Z = 90,
+        ampersand = 38,
+        asterisk = 42,
+        at = 64,
+        backslash = 92,
+        backtick = 96,
+        bar = 124,
+        caret = 94,
+        closeBrace = 125,
+        closeBracket = 93,
+        closeParen = 41,
+        colon = 58,
+        comma = 44,
+        dot = 46,
+        doubleQuote = 34,
+        equals = 61,
+        exclamation = 33,
+        greaterThan = 62,
+        hash = 35,
+        lessThan = 60,
+        minus = 45,
+        openBrace = 123,
+        openBracket = 91,
+        openParen = 40,
+        percent = 37,
+        plus = 43,
+        question = 63,
+        semicolon = 59,
+        singleQuote = 39,
+        slash = 47,
+        tilde = 126,
+        backspace = 8,
+        formFeed = 12,
+        byteOrderMark = 65279,
+        tab = 9,
+        verticalTab = 11
+    }
     interface ModuleResolutionHost {
         fileExists(fileName: string): boolean;
         readFile(fileName: string): string | undefined;
@@ -2598,6 +4002,7 @@ declare namespace ts {
      * If changing this, remember to change `moduleResolutionIsEqualTo`.
      */
     interface ResolvedModuleFull extends ResolvedModule {
+        readonly originalPath?: string;
         /**
          * Extension of resolvedFileName. This must match what's at the end of resolvedFileName.
          * This is optional for backwards-compatibility, but will be added if not provided.
@@ -2634,6 +4039,7 @@ declare namespace ts {
     }
     interface ResolvedModuleWithFailedLookupLocations {
         readonly resolvedModule: ResolvedModuleFull | undefined;
+        readonly failedLookupLocations: ReadonlyArray<string>;
     }
     interface ResolvedTypeReferenceDirective {
         primary: boolean;
@@ -2644,6 +4050,7 @@ declare namespace ts {
         readonly resolvedTypeReferenceDirective: ResolvedTypeReferenceDirective | undefined;
         readonly failedLookupLocations: ReadonlyArray<string>;
     }
+    type HasInvalidatedResolution = (sourceFile: Path) => boolean;
     interface CompilerHost extends ModuleResolutionHost {
         getSourceFile(fileName: string, languageVersion: ScriptTarget, onError?: (message: string) => void, shouldCreateNewSourceFile?: boolean): SourceFile | undefined;
         getSourceFileByPath?(fileName: string, path: Path, languageVersion: ScriptTarget, onError?: (message: string) => void, shouldCreateNewSourceFile?: boolean): SourceFile | undefined;
@@ -2663,19 +4070,97 @@ declare namespace ts {
          */
         resolveTypeReferenceDirectives?(typeReferenceDirectiveNames: string[], containingFile: string): ResolvedTypeReferenceDirective[];
         getEnvironmentVariable?(name: string): string | undefined;
+        onReleaseOldSourceFile?(oldSourceFile: SourceFile, oldOptions: CompilerOptions): void;
+        hasInvalidatedResolution?: HasInvalidatedResolution;
+        hasChangedAutomaticTypeDirectiveNames?: boolean;
         createHash?(data: string): string;
         getModifiedTime?(fileName: string): Date;
         setModifiedTime?(fileName: string, date: Date): void;
         deleteFile?(fileName: string): void;
     }
+    enum TransformFlags {
+        None = 0,
+        TypeScript = 1,
+        ContainsTypeScript = 2,
+        ContainsJsx = 4,
+        ContainsESNext = 8,
+        ContainsES2017 = 16,
+        ContainsES2016 = 32,
+        ES2015 = 64,
+        ContainsES2015 = 128,
+        Generator = 256,
+        ContainsGenerator = 512,
+        DestructuringAssignment = 1024,
+        ContainsDestructuringAssignment = 2048,
+        ContainsDecorators = 4096,
+        ContainsPropertyInitializer = 8192,
+        ContainsLexicalThis = 16384,
+        ContainsCapturedLexicalThis = 32768,
+        ContainsLexicalThisInComputedPropertyName = 65536,
+        ContainsDefaultValueAssignments = 131072,
+        ContainsParameterPropertyAssignments = 262144,
+        ContainsSpread = 524288,
+        ContainsObjectSpread = 1048576,
+        ContainsRest = 524288,
+        ContainsObjectRest = 1048576,
+        ContainsComputedPropertyName = 2097152,
+        ContainsBlockScopedBinding = 4194304,
+        ContainsBindingPattern = 8388608,
+        ContainsYield = 16777216,
+        ContainsHoistedDeclarationOrCompletion = 33554432,
+        ContainsDynamicImport = 67108864,
+        Super = 134217728,
+        ContainsSuper = 268435456,
+        HasComputedFlags = 536870912,
+        AssertTypeScript = 3,
+        AssertJsx = 4,
+        AssertESNext = 8,
+        AssertES2017 = 16,
+        AssertES2016 = 32,
+        AssertES2015 = 192,
+        AssertGenerator = 768,
+        AssertDestructuringAssignment = 3072,
+        OuterExpressionExcludes = 536872257,
+        PropertyAccessExcludes = 671089985,
+        NodeExcludes = 939525441,
+        ArrowFunctionExcludes = 1003902273,
+        FunctionExcludes = 1003935041,
+        ConstructorExcludes = 1003668801,
+        MethodOrAccessorExcludes = 1003668801,
+        ClassExcludes = 942011713,
+        ModuleExcludes = 977327425,
+        TypeExcludes = -3,
+        ObjectLiteralExcludes = 942740801,
+        ArrayLiteralOrCallOrNewExcludes = 940049729,
+        VariableDeclarationListExcludes = 948962625,
+        ParameterExcludes = 939525441,
+        CatchClauseExcludes = 940574017,
+        BindingPatternExcludes = 940049729,
+        TypeScriptClassSyntaxMask = 274432,
+        ES2015FunctionSyntaxMask = 163840
+    }
     interface SourceMapRange extends TextRange {
         source?: SourceMapSource;
     }
     interface SourceMapSource {
         fileName: string;
         text: string;
+        lineMap: ReadonlyArray<number>;
         skipTrivia?: (pos: number) => number;
     }
+    interface EmitNode {
+        annotatedNodes?: Node[];
+        flags: EmitFlags;
+        leadingComments?: SynthesizedComment[];
+        trailingComments?: SynthesizedComment[];
+        commentRange?: TextRange;
+        sourceMapRange?: SourceMapRange;
+        tokenSourceMapRanges?: (SourceMapRange | undefined)[];
+        constantValue?: string | number;
+        externalHelpersModuleName?: Identifier;
+        helpers?: EmitHelper[];
+        startsOnNewLine?: boolean;
+    }
     enum EmitFlags {
         None = 0,
         SingleLine = 1,
@@ -2705,7 +4190,9 @@ declare namespace ts {
         NoHoisting = 2097152,
         HasEndOfDeclarationMarker = 4194304,
         Iterator = 8388608,
-        NoAsciiEscaping = 16777216
+        NoAsciiEscaping = 16777216,
+        TypeScriptClassWrapper = 33554432,
+        NeverApplyImportHelper = 67108864
     }
     interface EmitHelper {
         readonly name: string;
@@ -2713,7 +4200,38 @@ declare namespace ts {
         readonly text: string | ((node: EmitHelperUniqueNameCallback) => string);
         readonly priority?: number;
     }
+    type UniqueNameHandler = (baseName: string, checkFn?: (name: string) => boolean, optimistic?: boolean) => string;
     type EmitHelperUniqueNameCallback = (name: string) => string;
+    /**
+     * Used by the checker, this enum keeps track of external emit helpers that should be type
+     * checked.
+     */
+    enum ExternalEmitHelpers {
+        Extends = 1,
+        Assign = 2,
+        Rest = 4,
+        Decorate = 8,
+        Metadata = 16,
+        Param = 32,
+        Awaiter = 64,
+        Generator = 128,
+        Values = 256,
+        Read = 512,
+        Spread = 1024,
+        Await = 2048,
+        AsyncGenerator = 4096,
+        AsyncDelegator = 8192,
+        AsyncValues = 16384,
+        ExportStar = 32768,
+        MakeTemplateObject = 65536,
+        FirstEmitHelper = 1,
+        LastEmitHelper = 65536,
+        ForOfIncludes = 256,
+        ForAwaitOfIncludes = 16384,
+        AsyncGeneratorIncludes = 6144,
+        AsyncDelegatorIncludes = 26624,
+        SpreadIncludes = 1536
+    }
     enum EmitHint {
         SourceFile = 0,
         Expression = 1,
@@ -2721,7 +4239,20 @@ declare namespace ts {
         MappedTypeParameter = 3,
         Unspecified = 4
     }
+    interface EmitHost extends ScriptReferenceHost, ModuleSpecifierResolutionHost {
+        getSourceFiles(): ReadonlyArray<SourceFile>;
+        getCurrentDirectory(): string;
+        isSourceFileFromExternalLibrary(file: SourceFile): boolean;
+        getCommonSourceDirectory(): string;
+        getCanonicalFileName(fileName: string): string;
+        getNewLine(): string;
+        isEmitBlocked(emitFileName: string): boolean;
+        getPrependNodes(): ReadonlyArray<InputFiles>;
+        writeFile: WriteFileCallback;
+    }
     interface TransformationContext {
+        getEmitResolver(): EmitResolver;
+        getEmitHost(): EmitHost;
         /** Gets the compiler options supplied to the transformer. */
         getCompilerOptions(): CompilerOptions;
         /** Starts a new lexical environment. */
@@ -2770,6 +4301,7 @@ declare namespace ts {
          * before returning the `NodeTransformer` callback.
          */
         onEmitNode: (hint: EmitHint, node: Node, emitCallback: (hint: EmitHint, node: Node) => void) => void;
+        addDiagnostic(diag: DiagnosticWithLocation): void;
     }
     interface TransformationResult<T extends Node> {
         /** Gets the transformed source files. */
@@ -2837,6 +4369,20 @@ declare namespace ts {
          * Prints a bundle of source files as-is, without any emit transformations.
          */
         printBundle(bundle: Bundle): string;
+        writeNode(hint: EmitHint, node: Node, sourceFile: SourceFile | undefined, writer: EmitTextWriter): void;
+        writeList<T extends Node>(format: ListFormat, list: NodeArray<T> | undefined, sourceFile: SourceFile | undefined, writer: EmitTextWriter): void;
+        writeFile(sourceFile: SourceFile, writer: EmitTextWriter): void;
+        writeBundle(bundle: Bundle, writer: EmitTextWriter, info?: BundleInfo): void;
+    }
+    /**
+     * When a bundle contains prepended content, we store a file on disk indicating where the non-prepended
+     * content of that file starts. On a subsequent build where there are no upstream .d.ts changes, we
+     * read the bundle info file and the original .js file to quickly re-use portion of the file
+     * that didn't originate in prepended content.
+     */
+    interface BundleInfo {
+        originalOffset: number;
+        totalLength: number;
     }
     interface PrintHandlers {
         /**
@@ -2880,23 +4426,57 @@ declare namespace ts {
          * ```
          */
         substituteNode?(hint: EmitHint, node: Node): Node;
+        onEmitSourceMapOfNode?: (hint: EmitHint, node: Node, emitCallback: (hint: EmitHint, node: Node) => void) => void;
+        onEmitSourceMapOfToken?: (node: Node | undefined, token: SyntaxKind, writer: (s: string) => void, pos: number, emitCallback: (token: SyntaxKind, writer: (s: string) => void, pos: number) => number) => number;
+        onEmitSourceMapOfPosition?: (pos: number) => void;
+        onSetSourceFile?: (node: SourceFile) => void;
+        onBeforeEmitNodeArray?: (nodes: NodeArray<any> | undefined) => void;
+        onAfterEmitNodeArray?: (nodes: NodeArray<any> | undefined) => void;
+        onBeforeEmitToken?: (node: Node) => void;
+        onAfterEmitToken?: (node: Node) => void;
     }
     interface PrinterOptions {
         removeComments?: boolean;
         newLine?: NewLineKind;
         omitTrailingSemicolon?: boolean;
         noEmitHelpers?: boolean;
+        module?: CompilerOptions["module"];
+        target?: CompilerOptions["target"];
+        sourceMap?: boolean;
+        inlineSourceMap?: boolean;
+        extendedDiagnostics?: boolean;
+        onlyPrintJsDocStyle?: boolean;
+    }
+    interface EmitTextWriter extends SymbolWriter {
+        write(s: string): void;
+        writeTextOfNode(text: string, node: Node): void;
+        getText(): string;
+        rawWrite(s: string): void;
+        writeLiteral(s: string): void;
+        getTextPos(): number;
+        getLine(): number;
+        getColumn(): number;
+        getIndent(): number;
+        isAtStartOfLine(): boolean;
     }
     interface GetEffectiveTypeRootsHost {
         directoryExists?(directoryName: string): boolean;
         getCurrentDirectory?(): string;
     }
+    /** @internal */
+    interface ModuleSpecifierResolutionHost extends GetEffectiveTypeRootsHost {
+        useCaseSensitiveFileNames?(): boolean;
+        fileExists?(path: string): boolean;
+        readFile?(path: string): string | undefined;
+    }
     /** @deprecated See comment on SymbolWriter */
     interface SymbolTracker {
         trackSymbol?(symbol: Symbol, enclosingDeclaration?: Node, meaning?: SymbolFlags): void;
         reportInaccessibleThisError?(): void;
         reportPrivateInBaseOfClassExpression?(propertyName: string): void;
         reportInaccessibleUniqueSymbolError?(): void;
+        moduleResolverHost?: ModuleSpecifierResolutionHost;
+        trackReferencedAmbientModule?(decl: ModuleDeclaration): void;
     }
     interface TextSpan {
         start: number;
@@ -2906,8 +4486,12 @@ declare namespace ts {
         span: TextSpan;
         newLength: number;
     }
-    interface SortedArray<T> extends Array<T> {
-        " __sortedArrayBrand": any;
+    interface DiagnosticCollection {
+        add(diagnostic: Diagnostic): void;
+        getGlobalDiagnostics(): Diagnostic[];
+        getDiagnostics(fileName: string): DiagnosticWithLocation[];
+        getDiagnostics(): Diagnostic[];
+        reattachFileDiagnostics(newFile: SourceFile): void;
     }
     interface SyntaxList extends Node {
         _children: Node[];
@@ -2977,19 +4561,145 @@ declare namespace ts {
         Parameters = 1296,
         IndexSignatureParameters = 4432
     }
+    enum PragmaKindFlags {
+        None = 0,
+        /**
+         * Triple slash comment of the form
+         * /// <pragma-name argname="value" />
+         */
+        TripleSlashXML = 1,
+        /**
+         * Single line comment of the form
+         * // @pragma-name argval1 argval2
+         * or
+         * /// @pragma-name argval1 argval2
+         */
+        SingleLine = 2,
+        /**
+         * Multiline non-jsdoc pragma of the form
+         * /* @pragma-name argval1 argval2 * /
+         */
+        MultiLine = 4,
+        All = 7,
+        Default = 7
+    }
+    interface PragmaArgumentSpecification<TName extends string> {
+        name: TName;
+        optional?: boolean;
+        captureSpan?: boolean;
+    }
+    interface PragmaDefinition<T1 extends string = string, T2 extends string = string, T3 extends string = string, T4 extends string = string> {
+        args?: [PragmaArgumentSpecification<T1>] | [PragmaArgumentSpecification<T1>, PragmaArgumentSpecification<T2>] | [PragmaArgumentSpecification<T1>, PragmaArgumentSpecification<T2>, PragmaArgumentSpecification<T3>] | [PragmaArgumentSpecification<T1>, PragmaArgumentSpecification<T2>, PragmaArgumentSpecification<T3>, PragmaArgumentSpecification<T4>];
+        kind?: PragmaKindFlags;
+    }
+    const commentPragmas: {
+        "reference": {
+            args: [{
+                name: "types";
+                optional: true;
+                captureSpan: true;
+            }, {
+                name: "lib";
+                optional: true;
+                captureSpan: true;
+            }, {
+                name: "path";
+                optional: true;
+                captureSpan: true;
+            }, {
+                name: "no-default-lib";
+                optional: true;
+            }];
+            kind: PragmaKindFlags;
+        };
+        "amd-dependency": {
+            args: [{
+                name: "path";
+            }, {
+                name: "name";
+                optional: true;
+            }];
+            kind: PragmaKindFlags;
+        };
+        "amd-module": {
+            args: [{
+                name: "name";
+            }];
+            kind: PragmaKindFlags;
+        };
+        "ts-check": {
+            kind: PragmaKindFlags;
+        };
+        "ts-nocheck": {
+            kind: PragmaKindFlags;
+        };
+        "jsx": {
+            args: [{
+                name: "factory";
+            }];
+            kind: PragmaKindFlags;
+        };
+    };
+    type PragmaArgTypeMaybeCapture<TDesc> = TDesc extends {
+        captureSpan: true;
+    } ? {
+        value: string;
+        pos: number;
+        end: number;
+    } : string;
+    type PragmaArgTypeOptional<TDesc, TName extends string> = TDesc extends {
+        optional: true;
+    } ? {
+        [K in TName]?: PragmaArgTypeMaybeCapture<TDesc>;
+    } : {
+        [K in TName]: PragmaArgTypeMaybeCapture<TDesc>;
+    };
+    /**
+     * Maps a pragma definition into the desired shape for its arguments object
+     * Maybe the below is a good argument for types being iterable on struture in some way.
+     */
+    type PragmaArgumentType<T extends PragmaDefinition> = T extends {
+        args: [PragmaArgumentSpecification<infer TName1>, PragmaArgumentSpecification<infer TName2>, PragmaArgumentSpecification<infer TName3>, PragmaArgumentSpecification<infer TName4>];
+    } ? PragmaArgTypeOptional<T["args"][0], TName1> & PragmaArgTypeOptional<T["args"][1], TName2> & PragmaArgTypeOptional<T["args"][2], TName3> & PragmaArgTypeOptional<T["args"][2], TName4> : T extends {
+        args: [PragmaArgumentSpecification<infer TName1>, PragmaArgumentSpecification<infer TName2>, PragmaArgumentSpecification<infer TName3>];
+    } ? PragmaArgTypeOptional<T["args"][0], TName1> & PragmaArgTypeOptional<T["args"][1], TName2> & PragmaArgTypeOptional<T["args"][2], TName3> : T extends {
+        args: [PragmaArgumentSpecification<infer TName1>, PragmaArgumentSpecification<infer TName2>];
+    } ? PragmaArgTypeOptional<T["args"][0], TName1> & PragmaArgTypeOptional<T["args"][1], TName2> : T extends {
+        args: [PragmaArgumentSpecification<infer TName>];
+    } ? PragmaArgTypeOptional<T["args"][0], TName> : object;
+    type ConcretePragmaSpecs = typeof commentPragmas;
+    type PragmaPsuedoMap = {
+        [K in keyof ConcretePragmaSpecs]?: {
+            arguments: PragmaArgumentType<ConcretePragmaSpecs[K]>;
+            range: CommentRange;
+        };
+    };
+    type PragmaPsuedoMapEntry = {
+        [K in keyof PragmaPsuedoMap]: {
+            name: K;
+            args: PragmaPsuedoMap[K];
+        };
+    }[keyof PragmaPsuedoMap];
+    /**
+     * A strongly-typed es6 map of pragma entries, the values of which are either a single argument
+     * value (if only one was found), or an array of multiple argument values if the pragma is present
+     * in multiple places
+     */
+    interface PragmaMap extends Map<PragmaPsuedoMap[keyof PragmaPsuedoMap] | PragmaPsuedoMap[keyof PragmaPsuedoMap][]> {
+        set<TKey extends keyof PragmaPsuedoMap>(key: TKey, value: PragmaPsuedoMap[TKey] | PragmaPsuedoMap[TKey][]): this;
+        get<TKey extends keyof PragmaPsuedoMap>(key: TKey): PragmaPsuedoMap[TKey] | PragmaPsuedoMap[TKey][];
+        forEach(action: <TKey extends keyof PragmaPsuedoMap>(value: PragmaPsuedoMap[TKey] | PragmaPsuedoMap[TKey][], key: TKey) => void): void;
+    }
 }
+declare function setTimeout(handler: (...args: any[]) => void, timeout: number): any;
+declare function clearTimeout(handle: any): void;
 declare namespace ts {
-    const versionMajorMinor = "3.0";
-    /** The version of the TypeScript compiler release */
-    const version: string;
-}
-declare namespace ts {
-    function isExternalModuleNameRelative(moduleName: string): boolean;
-    function sortAndDeduplicateDiagnostics<T extends Diagnostic>(diagnostics: ReadonlyArray<T>): T[];
-}
-declare function setTimeout(handler: (...args: any[]) => void, timeout: number): any;
-declare function clearTimeout(handle: any): void;
-declare namespace ts {
+    /**
+     * Set a high stack trace limit to provide more information in case of an error.
+     * Called for command-line and server use cases.
+     * Not called if TypeScript is used as a library.
+     */
+    function setStackTraceLimit(): void;
     enum FileWatcherEventKind {
         Created = 0,
         Changed = 1,
@@ -2997,6 +4707,47 @@ declare namespace ts {
     }
     type FileWatcherCallback = (fileName: string, eventKind: FileWatcherEventKind) => void;
     type DirectoryWatcherCallback = (fileName: string) => void;
+    interface WatchedFile {
+        readonly fileName: string;
+        readonly callback: FileWatcherCallback;
+        mtime: Date;
+    }
+    enum PollingInterval {
+        High = 2000,
+        Medium = 500,
+        Low = 250
+    }
+    function watchFileUsingPriorityPollingInterval(host: System, fileName: string, callback: FileWatcherCallback, watchPriority: PollingInterval): FileWatcher;
+    type HostWatchFile = (fileName: string, callback: FileWatcherCallback, pollingInterval: PollingInterval | undefined) => FileWatcher;
+    type HostWatchDirectory = (fileName: string, callback: DirectoryWatcherCallback, recursive?: boolean) => FileWatcher;
+    const missingFileModifiedTime: Date;
+    let unchangedPollThresholds: {
+        [PollingInterval.Low]: number;
+        [PollingInterval.Medium]: number;
+        [PollingInterval.High]: number;
+    };
+    function setCustomPollingValues(system: System): void;
+    function createDynamicPriorityPollingWatchFile(host: {
+        getModifiedTime: System["getModifiedTime"];
+        setTimeout: System["setTimeout"];
+    }): HostWatchFile;
+    /**
+     * Returns true if file status changed
+     */
+    function onWatchedFileStat(watchedFile: WatchedFile, modifiedTime: Date): boolean;
+    interface RecursiveDirectoryWatcherHost {
+        watchDirectory: HostWatchDirectory;
+        getAccessibleSortedChildDirectories(path: string): ReadonlyArray<string>;
+        directoryExists(dir: string): boolean;
+        filePathComparer: Comparer<string>;
+        realpath(s: string): string;
+    }
+    /**
+     * Watch the directory recursively using host provided method to watch child directories
+     * that means if this is recursive watcher, watch the children directories as well
+     * (eg on OS that dont support recursive watch using fs.watch use fs.watchFile)
+     */
+    function createRecursiveDirectoryWatcher(host: RecursiveDirectoryWatcherHost): (directoryName: string, callback: DirectoryWatcherCallback) => FileWatcher;
     interface System {
         args: string[];
         newLine: string;
@@ -3032,9 +4783,13 @@ declare namespace ts {
         getMemoryUsage?(): number;
         exit(exitCode?: number): void;
         realpath?(path: string): string;
+        getEnvironmentVariable(name: string): string;
+        tryEnableSourceMapsForHost?(): void;
+        debugMode?: boolean;
         setTimeout?(callback: (...args: any[]) => void, ms: number, ...args: any[]): any;
         clearTimeout?(timeoutId: any): void;
         clearScreen?(): void;
+        setBlocking?(): void;
         base64decode?(input: string): string;
         base64encode?(input: string): string;
     }
@@ -3044,8 +4799,1113 @@ declare namespace ts {
     function getNodeMajorVersion(): number | undefined;
     let sys: System;
 }
+declare namespace ts {
+    const Diagnostics: {
+        Unterminated_string_literal: DiagnosticMessage;
+        Identifier_expected: DiagnosticMessage;
+        _0_expected: DiagnosticMessage;
+        A_file_cannot_have_a_reference_to_itself: DiagnosticMessage;
+        Trailing_comma_not_allowed: DiagnosticMessage;
+        Asterisk_Slash_expected: DiagnosticMessage;
+        An_element_access_expression_should_take_an_argument: DiagnosticMessage;
+        Unexpected_token: DiagnosticMessage;
+        A_rest_parameter_or_binding_pattern_may_not_have_a_trailing_comma: DiagnosticMessage;
+        A_rest_parameter_must_be_last_in_a_parameter_list: DiagnosticMessage;
+        Parameter_cannot_have_question_mark_and_initializer: DiagnosticMessage;
+        A_required_parameter_cannot_follow_an_optional_parameter: DiagnosticMessage;
+        An_index_signature_cannot_have_a_rest_parameter: DiagnosticMessage;
+        An_index_signature_parameter_cannot_have_an_accessibility_modifier: DiagnosticMessage;
+        An_index_signature_parameter_cannot_have_a_question_mark: DiagnosticMessage;
+        An_index_signature_parameter_cannot_have_an_initializer: DiagnosticMessage;
+        An_index_signature_must_have_a_type_annotation: DiagnosticMessage;
+        An_index_signature_parameter_must_have_a_type_annotation: DiagnosticMessage;
+        An_index_signature_parameter_type_must_be_string_or_number: DiagnosticMessage;
+        readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature: DiagnosticMessage;
+        Accessibility_modifier_already_seen: DiagnosticMessage;
+        _0_modifier_must_precede_1_modifier: DiagnosticMessage;
+        _0_modifier_already_seen: DiagnosticMessage;
+        _0_modifier_cannot_appear_on_a_class_element: DiagnosticMessage;
+        super_must_be_followed_by_an_argument_list_or_member_access: DiagnosticMessage;
+        Only_ambient_modules_can_use_quoted_names: DiagnosticMessage;
+        Statements_are_not_allowed_in_ambient_contexts: DiagnosticMessage;
+        A_declare_modifier_cannot_be_used_in_an_already_ambient_context: DiagnosticMessage;
+        Initializers_are_not_allowed_in_ambient_contexts: DiagnosticMessage;
+        _0_modifier_cannot_be_used_in_an_ambient_context: DiagnosticMessage;
+        _0_modifier_cannot_be_used_with_a_class_declaration: DiagnosticMessage;
+        _0_modifier_cannot_be_used_here: DiagnosticMessage;
+        _0_modifier_cannot_appear_on_a_data_property: DiagnosticMessage;
+        _0_modifier_cannot_appear_on_a_module_or_namespace_element: DiagnosticMessage;
+        A_0_modifier_cannot_be_used_with_an_interface_declaration: DiagnosticMessage;
+        A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file: DiagnosticMessage;
+        A_rest_parameter_cannot_be_optional: DiagnosticMessage;
+        A_rest_parameter_cannot_have_an_initializer: DiagnosticMessage;
+        A_set_accessor_must_have_exactly_one_parameter: DiagnosticMessage;
+        A_set_accessor_cannot_have_an_optional_parameter: DiagnosticMessage;
+        A_set_accessor_parameter_cannot_have_an_initializer: DiagnosticMessage;
+        A_set_accessor_cannot_have_rest_parameter: DiagnosticMessage;
+        A_get_accessor_cannot_have_parameters: DiagnosticMessage;
+        Type_0_is_not_a_valid_async_function_return_type_in_ES5_SlashES3_because_it_does_not_refer_to_a_Promise_compatible_constructor_value: DiagnosticMessage;
+        Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher: DiagnosticMessage;
+        An_async_function_or_method_must_have_a_valid_awaitable_return_type: DiagnosticMessage;
+        The_return_type_of_an_async_function_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member: DiagnosticMessage;
+        A_promise_must_have_a_then_method: DiagnosticMessage;
+        The_first_parameter_of_the_then_method_of_a_promise_must_be_a_callback: DiagnosticMessage;
+        Enum_member_must_have_initializer: DiagnosticMessage;
+        Type_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method: DiagnosticMessage;
+        An_export_assignment_cannot_be_used_in_a_namespace: DiagnosticMessage;
+        The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type: DiagnosticMessage;
+        In_ambient_enum_declarations_member_initializer_must_be_constant_expression: DiagnosticMessage;
+        Unexpected_token_A_constructor_method_accessor_or_property_was_expected: DiagnosticMessage;
+        Unexpected_token_A_type_parameter_name_was_expected_without_curly_braces: DiagnosticMessage;
+        _0_modifier_cannot_appear_on_a_type_member: DiagnosticMessage;
+        _0_modifier_cannot_appear_on_an_index_signature: DiagnosticMessage;
+        A_0_modifier_cannot_be_used_with_an_import_declaration: DiagnosticMessage;
+        Invalid_reference_directive_syntax: DiagnosticMessage;
+        Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher_Use_the_syntax_0: DiagnosticMessage;
+        An_accessor_cannot_be_declared_in_an_ambient_context: DiagnosticMessage;
+        _0_modifier_cannot_appear_on_a_constructor_declaration: DiagnosticMessage;
+        _0_modifier_cannot_appear_on_a_parameter: DiagnosticMessage;
+        Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement: DiagnosticMessage;
+        Type_parameters_cannot_appear_on_a_constructor_declaration: DiagnosticMessage;
+        Type_annotation_cannot_appear_on_a_constructor_declaration: DiagnosticMessage;
+        An_accessor_cannot_have_type_parameters: DiagnosticMessage;
+        A_set_accessor_cannot_have_a_return_type_annotation: DiagnosticMessage;
+        An_index_signature_must_have_exactly_one_parameter: DiagnosticMessage;
+        _0_list_cannot_be_empty: DiagnosticMessage;
+        Type_parameter_list_cannot_be_empty: DiagnosticMessage;
+        Type_argument_list_cannot_be_empty: DiagnosticMessage;
+        Invalid_use_of_0_in_strict_mode: DiagnosticMessage;
+        with_statements_are_not_allowed_in_strict_mode: DiagnosticMessage;
+        delete_cannot_be_called_on_an_identifier_in_strict_mode: DiagnosticMessage;
+        A_for_await_of_statement_is_only_allowed_within_an_async_function_or_async_generator: DiagnosticMessage;
+        A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement: DiagnosticMessage;
+        A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement: DiagnosticMessage;
+        Jump_target_cannot_cross_function_boundary: DiagnosticMessage;
+        A_return_statement_can_only_be_used_within_a_function_body: DiagnosticMessage;
+        Expression_expected: DiagnosticMessage;
+        Type_expected: DiagnosticMessage;
+        A_default_clause_cannot_appear_more_than_once_in_a_switch_statement: DiagnosticMessage;
+        Duplicate_label_0: DiagnosticMessage;
+        A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement: DiagnosticMessage;
+        A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement: DiagnosticMessage;
+        An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode: DiagnosticMessage;
+        An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name: DiagnosticMessage;
+        An_object_literal_cannot_have_property_and_accessor_with_the_same_name: DiagnosticMessage;
+        An_export_assignment_cannot_have_modifiers: DiagnosticMessage;
+        Octal_literals_are_not_allowed_in_strict_mode: DiagnosticMessage;
+        A_tuple_type_element_list_cannot_be_empty: DiagnosticMessage;
+        Variable_declaration_list_cannot_be_empty: DiagnosticMessage;
+        Digit_expected: DiagnosticMessage;
+        Hexadecimal_digit_expected: DiagnosticMessage;
+        Unexpected_end_of_text: DiagnosticMessage;
+        Invalid_character: DiagnosticMessage;
+        Declaration_or_statement_expected: DiagnosticMessage;
+        Statement_expected: DiagnosticMessage;
+        case_or_default_expected: DiagnosticMessage;
+        Property_or_signature_expected: DiagnosticMessage;
+        Enum_member_expected: DiagnosticMessage;
+        Variable_declaration_expected: DiagnosticMessage;
+        Argument_expression_expected: DiagnosticMessage;
+        Property_assignment_expected: DiagnosticMessage;
+        Expression_or_comma_expected: DiagnosticMessage;
+        Parameter_declaration_expected: DiagnosticMessage;
+        Type_parameter_declaration_expected: DiagnosticMessage;
+        Type_argument_expected: DiagnosticMessage;
+        String_literal_expected: DiagnosticMessage;
+        Line_break_not_permitted_here: DiagnosticMessage;
+        or_expected: DiagnosticMessage;
+        Declaration_expected: DiagnosticMessage;
+        Import_declarations_in_a_namespace_cannot_reference_a_module: DiagnosticMessage;
+        Cannot_use_imports_exports_or_module_augmentations_when_module_is_none: DiagnosticMessage;
+        File_name_0_differs_from_already_included_file_name_1_only_in_casing: DiagnosticMessage;
+        new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead: DiagnosticMessage;
+        const_declarations_must_be_initialized: DiagnosticMessage;
+        const_declarations_can_only_be_declared_inside_a_block: DiagnosticMessage;
+        let_declarations_can_only_be_declared_inside_a_block: DiagnosticMessage;
+        Unterminated_template_literal: DiagnosticMessage;
+        Unterminated_regular_expression_literal: DiagnosticMessage;
+        An_object_member_cannot_be_declared_optional: DiagnosticMessage;
+        A_yield_expression_is_only_allowed_in_a_generator_body: DiagnosticMessage;
+        Computed_property_names_are_not_allowed_in_enums: DiagnosticMessage;
+        A_computed_property_name_in_an_ambient_context_must_refer_to_an_expression_whose_type_is_a_literal_type_or_a_unique_symbol_type: DiagnosticMessage;
+        A_computed_property_name_in_a_class_property_declaration_must_refer_to_an_expression_whose_type_is_a_literal_type_or_a_unique_symbol_type: DiagnosticMessage;
+        A_computed_property_name_in_a_method_overload_must_refer_to_an_expression_whose_type_is_a_literal_type_or_a_unique_symbol_type: DiagnosticMessage;
+        A_computed_property_name_in_an_interface_must_refer_to_an_expression_whose_type_is_a_literal_type_or_a_unique_symbol_type: DiagnosticMessage;
+        A_computed_property_name_in_a_type_literal_must_refer_to_an_expression_whose_type_is_a_literal_type_or_a_unique_symbol_type: DiagnosticMessage;
+        A_comma_expression_is_not_allowed_in_a_computed_property_name: DiagnosticMessage;
+        extends_clause_already_seen: DiagnosticMessage;
+        extends_clause_must_precede_implements_clause: DiagnosticMessage;
+        Classes_can_only_extend_a_single_class: DiagnosticMessage;
+        implements_clause_already_seen: DiagnosticMessage;
+        Interface_declaration_cannot_have_implements_clause: DiagnosticMessage;
+        Binary_digit_expected: DiagnosticMessage;
+        Octal_digit_expected: DiagnosticMessage;
+        Unexpected_token_expected: DiagnosticMessage;
+        Property_destructuring_pattern_expected: DiagnosticMessage;
+        Array_element_destructuring_pattern_expected: DiagnosticMessage;
+        A_destructuring_declaration_must_have_an_initializer: DiagnosticMessage;
+        An_implementation_cannot_be_declared_in_ambient_contexts: DiagnosticMessage;
+        Modifiers_cannot_appear_here: DiagnosticMessage;
+        Merge_conflict_marker_encountered: DiagnosticMessage;
+        A_rest_element_cannot_have_an_initializer: DiagnosticMessage;
+        A_parameter_property_may_not_be_declared_using_a_binding_pattern: DiagnosticMessage;
+        Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement: DiagnosticMessage;
+        The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer: DiagnosticMessage;
+        The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer: DiagnosticMessage;
+        An_import_declaration_cannot_have_modifiers: DiagnosticMessage;
+        Module_0_has_no_default_export: DiagnosticMessage;
+        An_export_declaration_cannot_have_modifiers: DiagnosticMessage;
+        Export_declarations_are_not_permitted_in_a_namespace: DiagnosticMessage;
+        Catch_clause_variable_cannot_have_a_type_annotation: DiagnosticMessage;
+        Catch_clause_variable_cannot_have_an_initializer: DiagnosticMessage;
+        An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive: DiagnosticMessage;
+        Unterminated_Unicode_escape_sequence: DiagnosticMessage;
+        Line_terminator_not_permitted_before_arrow: DiagnosticMessage;
+        Import_assignment_cannot_be_used_when_targeting_ECMAScript_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead: DiagnosticMessage;
+        Export_assignment_cannot_be_used_when_targeting_ECMAScript_modules_Consider_using_export_default_or_another_module_format_instead: DiagnosticMessage;
+        Cannot_re_export_a_type_when_the_isolatedModules_flag_is_provided: DiagnosticMessage;
+        Decorators_are_not_valid_here: DiagnosticMessage;
+        Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name: DiagnosticMessage;
+        Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided: DiagnosticMessage;
+        Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided: DiagnosticMessage;
+        Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode: DiagnosticMessage;
+        A_class_declaration_without_the_default_modifier_must_have_a_name: DiagnosticMessage;
+        Identifier_expected_0_is_a_reserved_word_in_strict_mode: DiagnosticMessage;
+        Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_strict_mode: DiagnosticMessage;
+        Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode: DiagnosticMessage;
+        Invalid_use_of_0_Modules_are_automatically_in_strict_mode: DiagnosticMessage;
+        Identifier_expected_esModule_is_reserved_as_an_exported_marker_when_transforming_ECMAScript_modules: DiagnosticMessage;
+        Export_assignment_is_not_supported_when_module_flag_is_system: DiagnosticMessage;
+        Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning: DiagnosticMessage;
+        Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher: DiagnosticMessage;
+        Generators_are_not_allowed_in_an_ambient_context: DiagnosticMessage;
+        An_overload_signature_cannot_be_declared_as_a_generator: DiagnosticMessage;
+        _0_tag_already_specified: DiagnosticMessage;
+        Signature_0_must_be_a_type_predicate: DiagnosticMessage;
+        Cannot_find_parameter_0: DiagnosticMessage;
+        Type_predicate_0_is_not_assignable_to_1: DiagnosticMessage;
+        Parameter_0_is_not_in_the_same_position_as_parameter_1: DiagnosticMessage;
+        A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods: DiagnosticMessage;
+        A_type_predicate_cannot_reference_a_rest_parameter: DiagnosticMessage;
+        A_type_predicate_cannot_reference_element_0_in_a_binding_pattern: DiagnosticMessage;
+        An_export_assignment_can_only_be_used_in_a_module: DiagnosticMessage;
+        An_import_declaration_can_only_be_used_in_a_namespace_or_module: DiagnosticMessage;
+        An_export_declaration_can_only_be_used_in_a_module: DiagnosticMessage;
+        An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file: DiagnosticMessage;
+        A_namespace_declaration_is_only_allowed_in_a_namespace_or_module: DiagnosticMessage;
+        The_return_type_of_a_property_decorator_function_must_be_either_void_or_any: DiagnosticMessage;
+        The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any: DiagnosticMessage;
+        Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression: DiagnosticMessage;
+        Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression: DiagnosticMessage;
+        Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression: DiagnosticMessage;
+        Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression: DiagnosticMessage;
+        abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration: DiagnosticMessage;
+        _0_modifier_cannot_be_used_with_1_modifier: DiagnosticMessage;
+        Abstract_methods_can_only_appear_within_an_abstract_class: DiagnosticMessage;
+        Method_0_cannot_have_an_implementation_because_it_is_marked_abstract: DiagnosticMessage;
+        An_interface_property_cannot_have_an_initializer: DiagnosticMessage;
+        A_type_literal_property_cannot_have_an_initializer: DiagnosticMessage;
+        A_class_member_cannot_have_the_0_keyword: DiagnosticMessage;
+        A_decorator_can_only_decorate_a_method_implementation_not_an_overload: DiagnosticMessage;
+        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5: DiagnosticMessage;
+        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_definitions_are_automatically_in_strict_mode: DiagnosticMessage;
+        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_are_automatically_in_strict_mode: DiagnosticMessage;
+        _0_tag_cannot_be_used_independently_as_a_top_level_JSDoc_tag: DiagnosticMessage;
+        A_const_initializer_in_an_ambient_context_must_be_a_string_or_numeric_literal: DiagnosticMessage;
+        A_definite_assignment_assertion_is_not_permitted_in_this_context: DiagnosticMessage;
+        with_statements_are_not_allowed_in_an_async_function_block: DiagnosticMessage;
+        await_expression_is_only_allowed_within_an_async_function: DiagnosticMessage;
+        can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment: DiagnosticMessage;
+        The_body_of_an_if_statement_cannot_be_the_empty_statement: DiagnosticMessage;
+        Global_module_exports_may_only_appear_in_module_files: DiagnosticMessage;
+        Global_module_exports_may_only_appear_in_declaration_files: DiagnosticMessage;
+        Global_module_exports_may_only_appear_at_top_level: DiagnosticMessage;
+        A_parameter_property_cannot_be_declared_using_a_rest_parameter: DiagnosticMessage;
+        An_abstract_accessor_cannot_have_an_implementation: DiagnosticMessage;
+        A_default_export_can_only_be_used_in_an_ECMAScript_style_module: DiagnosticMessage;
+        Type_of_await_operand_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member: DiagnosticMessage;
+        Type_of_yield_operand_in_an_async_generator_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member: DiagnosticMessage;
+        Type_of_iterated_elements_of_a_yield_Asterisk_operand_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member: DiagnosticMessage;
+        Dynamic_import_is_only_supported_when_module_flag_is_commonjs_or_esNext: DiagnosticMessage;
+        Dynamic_import_must_have_one_specifier_as_an_argument: DiagnosticMessage;
+        Specifier_of_dynamic_import_cannot_be_spread_element: DiagnosticMessage;
+        Dynamic_import_cannot_have_type_arguments: DiagnosticMessage;
+        String_literal_with_double_quotes_expected: DiagnosticMessage;
+        Property_value_can_only_be_string_literal_numeric_literal_true_false_null_object_literal_or_array_literal: DiagnosticMessage;
+        _0_accepts_too_few_arguments_to_be_used_as_a_decorator_here_Did_you_mean_to_call_it_first_and_write_0: DiagnosticMessage;
+        A_property_of_an_interface_or_type_literal_whose_type_is_a_unique_symbol_type_must_be_readonly: DiagnosticMessage;
+        A_property_of_a_class_whose_type_is_a_unique_symbol_type_must_be_both_static_and_readonly: DiagnosticMessage;
+        A_variable_whose_type_is_a_unique_symbol_type_must_be_const: DiagnosticMessage;
+        unique_symbol_types_may_not_be_used_on_a_variable_declaration_with_a_binding_name: DiagnosticMessage;
+        unique_symbol_types_are_only_allowed_on_variables_in_a_variable_statement: DiagnosticMessage;
+        unique_symbol_types_are_not_allowed_here: DiagnosticMessage;
+        An_index_signature_parameter_type_cannot_be_a_type_alias_Consider_writing_0_Colon_1_Colon_2_instead: DiagnosticMessage;
+        An_index_signature_parameter_type_cannot_be_a_union_type_Consider_using_a_mapped_object_type_instead: DiagnosticMessage;
+        infer_declarations_are_only_permitted_in_the_extends_clause_of_a_conditional_type: DiagnosticMessage;
+        Module_0_does_not_refer_to_a_value_but_is_used_as_a_value_here: DiagnosticMessage;
+        Module_0_does_not_refer_to_a_type_but_is_used_as_a_type_here: DiagnosticMessage;
+        Type_arguments_cannot_be_used_here: DiagnosticMessage;
+        The_import_meta_meta_property_is_only_allowed_using_ESNext_for_the_target_and_module_compiler_options: DiagnosticMessage;
+        Duplicate_identifier_0: DiagnosticMessage;
+        Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor: DiagnosticMessage;
+        Static_members_cannot_reference_class_type_parameters: DiagnosticMessage;
+        Circular_definition_of_import_alias_0: DiagnosticMessage;
+        Cannot_find_name_0: DiagnosticMessage;
+        Module_0_has_no_exported_member_1: DiagnosticMessage;
+        File_0_is_not_a_module: DiagnosticMessage;
+        Cannot_find_module_0: DiagnosticMessage;
+        Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambiguity: DiagnosticMessage;
+        An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements: DiagnosticMessage;
+        Type_0_recursively_references_itself_as_a_base_type: DiagnosticMessage;
+        A_class_may_only_extend_another_class: DiagnosticMessage;
+        An_interface_may_only_extend_a_class_or_another_interface: DiagnosticMessage;
+        Type_parameter_0_has_a_circular_constraint: DiagnosticMessage;
+        Generic_type_0_requires_1_type_argument_s: DiagnosticMessage;
+        Type_0_is_not_generic: DiagnosticMessage;
+        Global_type_0_must_be_a_class_or_interface_type: DiagnosticMessage;
+        Global_type_0_must_have_1_type_parameter_s: DiagnosticMessage;
+        Cannot_find_global_type_0: DiagnosticMessage;
+        Named_property_0_of_types_1_and_2_are_not_identical: DiagnosticMessage;
+        Interface_0_cannot_simultaneously_extend_types_1_and_2: DiagnosticMessage;
+        Excessive_stack_depth_comparing_types_0_and_1: DiagnosticMessage;
+        Type_0_is_not_assignable_to_type_1: DiagnosticMessage;
+        Cannot_redeclare_exported_variable_0: DiagnosticMessage;
+        Property_0_is_missing_in_type_1: DiagnosticMessage;
+        Property_0_is_private_in_type_1_but_not_in_type_2: DiagnosticMessage;
+        Types_of_property_0_are_incompatible: DiagnosticMessage;
+        Property_0_is_optional_in_type_1_but_required_in_type_2: DiagnosticMessage;
+        Types_of_parameters_0_and_1_are_incompatible: DiagnosticMessage;
+        Index_signature_is_missing_in_type_0: DiagnosticMessage;
+        Index_signatures_are_incompatible: DiagnosticMessage;
+        this_cannot_be_referenced_in_a_module_or_namespace_body: DiagnosticMessage;
+        this_cannot_be_referenced_in_current_location: DiagnosticMessage;
+        this_cannot_be_referenced_in_constructor_arguments: DiagnosticMessage;
+        this_cannot_be_referenced_in_a_static_property_initializer: DiagnosticMessage;
+        super_can_only_be_referenced_in_a_derived_class: DiagnosticMessage;
+        super_cannot_be_referenced_in_constructor_arguments: DiagnosticMessage;
+        Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors: DiagnosticMessage;
+        super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_derived_class: DiagnosticMessage;
+        Property_0_does_not_exist_on_type_1: DiagnosticMessage;
+        Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword: DiagnosticMessage;
+        Property_0_is_private_and_only_accessible_within_class_1: DiagnosticMessage;
+        An_index_expression_argument_must_be_of_type_string_number_symbol_or_any: DiagnosticMessage;
+        This_syntax_requires_an_imported_helper_named_1_but_module_0_has_no_exported_member_1: DiagnosticMessage;
+        Type_0_does_not_satisfy_the_constraint_1: DiagnosticMessage;
+        Argument_of_type_0_is_not_assignable_to_parameter_of_type_1: DiagnosticMessage;
+        Call_target_does_not_contain_any_signatures: DiagnosticMessage;
+        Untyped_function_calls_may_not_accept_type_arguments: DiagnosticMessage;
+        Value_of_type_0_is_not_callable_Did_you_mean_to_include_new: DiagnosticMessage;
+        Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures: DiagnosticMessage;
+        Only_a_void_function_can_be_called_with_the_new_keyword: DiagnosticMessage;
+        Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature: DiagnosticMessage;
+        Type_0_cannot_be_converted_to_type_1: DiagnosticMessage;
+        Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1: DiagnosticMessage;
+        This_syntax_requires_an_imported_helper_but_module_0_cannot_be_found: DiagnosticMessage;
+        A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value: DiagnosticMessage;
+        An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type: DiagnosticMessage;
+        The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_or_a_property_access: DiagnosticMessage;
+        The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_parameter: DiagnosticMessage;
+        The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_Function_interface_type: DiagnosticMessage;
+        The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol: DiagnosticMessage;
+        The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter: DiagnosticMessage;
+        The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type: DiagnosticMessage;
+        The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type: DiagnosticMessage;
+        The_left_hand_side_of_an_assignment_expression_must_be_a_variable_or_a_property_access: DiagnosticMessage;
+        Operator_0_cannot_be_applied_to_types_1_and_2: DiagnosticMessage;
+        Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined: DiagnosticMessage;
+        Type_parameter_name_cannot_be_0: DiagnosticMessage;
+        A_parameter_property_is_only_allowed_in_a_constructor_implementation: DiagnosticMessage;
+        A_rest_parameter_must_be_of_an_array_type: DiagnosticMessage;
+        A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation: DiagnosticMessage;
+        Parameter_0_cannot_be_referenced_in_its_initializer: DiagnosticMessage;
+        Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it: DiagnosticMessage;
+        Duplicate_string_index_signature: DiagnosticMessage;
+        Duplicate_number_index_signature: DiagnosticMessage;
+        A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_properties_or_has_parameter_properties: DiagnosticMessage;
+        Constructors_for_derived_classes_must_contain_a_super_call: DiagnosticMessage;
+        A_get_accessor_must_return_a_value: DiagnosticMessage;
+        Getter_and_setter_accessors_do_not_agree_in_visibility: DiagnosticMessage;
+        get_and_set_accessor_must_have_the_same_type: DiagnosticMessage;
+        A_signature_with_an_implementation_cannot_use_a_string_literal_type: DiagnosticMessage;
+        Specialized_overload_signature_is_not_assignable_to_any_non_specialized_signature: DiagnosticMessage;
+        Overload_signatures_must_all_be_exported_or_non_exported: DiagnosticMessage;
+        Overload_signatures_must_all_be_ambient_or_non_ambient: DiagnosticMessage;
+        Overload_signatures_must_all_be_public_private_or_protected: DiagnosticMessage;
+        Overload_signatures_must_all_be_optional_or_required: DiagnosticMessage;
+        Function_overload_must_be_static: DiagnosticMessage;
+        Function_overload_must_not_be_static: DiagnosticMessage;
+        Function_implementation_name_must_be_0: DiagnosticMessage;
+        Constructor_implementation_is_missing: DiagnosticMessage;
+        Function_implementation_is_missing_or_not_immediately_following_the_declaration: DiagnosticMessage;
+        Multiple_constructor_implementations_are_not_allowed: DiagnosticMessage;
+        Duplicate_function_implementation: DiagnosticMessage;
+        Overload_signature_is_not_compatible_with_function_implementation: DiagnosticMessage;
+        Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local: DiagnosticMessage;
+        Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters: DiagnosticMessage;
+        Declaration_name_conflicts_with_built_in_global_identifier_0: DiagnosticMessage;
+        Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference: DiagnosticMessage;
+        Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference: DiagnosticMessage;
+        Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference: DiagnosticMessage;
+        Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference: DiagnosticMessage;
+        Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_type_2: DiagnosticMessage;
+        The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation: DiagnosticMessage;
+        The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any: DiagnosticMessage;
+        The_left_hand_side_of_a_for_in_statement_must_be_a_variable_or_a_property_access: DiagnosticMessage;
+        The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter_but_here_has_type_0: DiagnosticMessage;
+        Setters_cannot_return_a_value: DiagnosticMessage;
+        Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class: DiagnosticMessage;
+        The_with_statement_is_not_supported_All_symbols_in_a_with_block_will_have_type_any: DiagnosticMessage;
+        Property_0_of_type_1_is_not_assignable_to_string_index_type_2: DiagnosticMessage;
+        Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2: DiagnosticMessage;
+        Numeric_index_type_0_is_not_assignable_to_string_index_type_1: DiagnosticMessage;
+        Class_name_cannot_be_0: DiagnosticMessage;
+        Class_0_incorrectly_extends_base_class_1: DiagnosticMessage;
+        Property_0_in_type_1_is_not_assignable_to_the_same_property_in_base_type_2: DiagnosticMessage;
+        Class_static_side_0_incorrectly_extends_base_class_static_side_1: DiagnosticMessage;
+        Class_0_incorrectly_implements_interface_1: DiagnosticMessage;
+        A_class_may_only_implement_another_class_or_interface: DiagnosticMessage;
+        Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_accessor: DiagnosticMessage;
+        Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_property: DiagnosticMessage;
+        Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_function: DiagnosticMessage;
+        Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_function: DiagnosticMessage;
+        Interface_name_cannot_be_0: DiagnosticMessage;
+        All_declarations_of_0_must_have_identical_type_parameters: DiagnosticMessage;
+        Interface_0_incorrectly_extends_interface_1: DiagnosticMessage;
+        Enum_name_cannot_be_0: DiagnosticMessage;
+        In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enum_element: DiagnosticMessage;
+        A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merged: DiagnosticMessage;
+        A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged: DiagnosticMessage;
+        Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces: DiagnosticMessage;
+        Ambient_module_declaration_cannot_specify_relative_module_name: DiagnosticMessage;
+        Module_0_is_hidden_by_a_local_declaration_with_the_same_name: DiagnosticMessage;
+        Import_name_cannot_be_0: DiagnosticMessage;
+        Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relative_module_name: DiagnosticMessage;
+        Import_declaration_conflicts_with_local_declaration_of_0: DiagnosticMessage;
+        Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module: DiagnosticMessage;
+        Types_have_separate_declarations_of_a_private_property_0: DiagnosticMessage;
+        Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2: DiagnosticMessage;
+        Property_0_is_protected_in_type_1_but_public_in_type_2: DiagnosticMessage;
+        Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses: DiagnosticMessage;
+        Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1: DiagnosticMessage;
+        The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead: DiagnosticMessage;
+        Block_scoped_variable_0_used_before_its_declaration: DiagnosticMessage;
+        Class_0_used_before_its_declaration: DiagnosticMessage;
+        Enum_0_used_before_its_declaration: DiagnosticMessage;
+        Cannot_redeclare_block_scoped_variable_0: DiagnosticMessage;
+        An_enum_member_cannot_have_a_numeric_name: DiagnosticMessage;
+        The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_type_arguments_explicitly: DiagnosticMessage;
+        Variable_0_is_used_before_being_assigned: DiagnosticMessage;
+        Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0: DiagnosticMessage;
+        Type_alias_0_circularly_references_itself: DiagnosticMessage;
+        Type_alias_name_cannot_be_0: DiagnosticMessage;
+        An_AMD_module_cannot_have_multiple_name_assignments: DiagnosticMessage;
+        Type_0_has_no_property_1_and_no_string_index_signature: DiagnosticMessage;
+        Type_0_has_no_property_1: DiagnosticMessage;
+        Type_0_is_not_an_array_type: DiagnosticMessage;
+        A_rest_element_must_be_last_in_a_destructuring_pattern: DiagnosticMessage;
+        A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature: DiagnosticMessage;
+        A_computed_property_name_must_be_of_type_string_number_symbol_or_any: DiagnosticMessage;
+        this_cannot_be_referenced_in_a_computed_property_name: DiagnosticMessage;
+        super_cannot_be_referenced_in_a_computed_property_name: DiagnosticMessage;
+        A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type: DiagnosticMessage;
+        Cannot_find_global_value_0: DiagnosticMessage;
+        The_0_operator_cannot_be_applied_to_type_symbol: DiagnosticMessage;
+        Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object: DiagnosticMessage;
+        A_computed_property_name_of_the_form_0_must_be_of_type_symbol: DiagnosticMessage;
+        Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher: DiagnosticMessage;
+        Enum_declarations_must_all_be_const_or_non_const: DiagnosticMessage;
+        In_const_enum_declarations_member_initializer_must_be_constant_expression: DiagnosticMessage;
+        const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_import_declaration_or_export_assignment_or_type_query: DiagnosticMessage;
+        A_const_enum_member_can_only_be_accessed_using_a_string_literal: DiagnosticMessage;
+        const_enum_member_initializer_was_evaluated_to_a_non_finite_value: DiagnosticMessage;
+        const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN: DiagnosticMessage;
+        Property_0_does_not_exist_on_const_enum_1: DiagnosticMessage;
+        let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations: DiagnosticMessage;
+        Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1: DiagnosticMessage;
+        The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation: DiagnosticMessage;
+        Export_declaration_conflicts_with_exported_declaration_of_0: DiagnosticMessage;
+        The_left_hand_side_of_a_for_of_statement_must_be_a_variable_or_a_property_access: DiagnosticMessage;
+        Type_0_must_have_a_Symbol_iterator_method_that_returns_an_iterator: DiagnosticMessage;
+        An_iterator_must_have_a_next_method: DiagnosticMessage;
+        The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property: DiagnosticMessage;
+        The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern: DiagnosticMessage;
+        Cannot_redeclare_identifier_0_in_catch_clause: DiagnosticMessage;
+        Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2: DiagnosticMessage;
+        Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher: DiagnosticMessage;
+        Type_0_is_not_an_array_type_or_a_string_type: DiagnosticMessage;
+        The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_standard_function_expression: DiagnosticMessage;
+        Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct: DiagnosticMessage;
+        Module_0_uses_export_and_cannot_be_used_with_export_Asterisk: DiagnosticMessage;
+        An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments: DiagnosticMessage;
+        A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments: DiagnosticMessage;
+        A_rest_element_cannot_contain_a_binding_pattern: DiagnosticMessage;
+        _0_is_referenced_directly_or_indirectly_in_its_own_type_annotation: DiagnosticMessage;
+        Cannot_find_namespace_0: DiagnosticMessage;
+        Type_0_must_have_a_Symbol_asyncIterator_method_that_returns_an_async_iterator: DiagnosticMessage;
+        A_generator_cannot_have_a_void_type_annotation: DiagnosticMessage;
+        _0_is_referenced_directly_or_indirectly_in_its_own_base_expression: DiagnosticMessage;
+        Type_0_is_not_a_constructor_function_type: DiagnosticMessage;
+        No_base_constructor_has_the_specified_number_of_type_arguments: DiagnosticMessage;
+        Base_constructor_return_type_0_is_not_a_class_or_interface_type: DiagnosticMessage;
+        Base_constructors_must_all_have_the_same_return_type: DiagnosticMessage;
+        Cannot_create_an_instance_of_an_abstract_class: DiagnosticMessage;
+        Overload_signatures_must_all_be_abstract_or_non_abstract: DiagnosticMessage;
+        Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression: DiagnosticMessage;
+        Classes_containing_abstract_methods_must_be_marked_abstract: DiagnosticMessage;
+        Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2: DiagnosticMessage;
+        All_declarations_of_an_abstract_method_must_be_consecutive: DiagnosticMessage;
+        Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type: DiagnosticMessage;
+        A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard: DiagnosticMessage;
+        An_async_iterator_must_have_a_next_method: DiagnosticMessage;
+        Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions: DiagnosticMessage;
+        Expression_resolves_to_variable_declaration_0_that_compiler_uses_to_support_async_functions: DiagnosticMessage;
+        The_arguments_object_cannot_be_referenced_in_an_async_function_or_method_in_ES3_and_ES5_Consider_using_a_standard_function_or_method: DiagnosticMessage;
+        yield_expressions_cannot_be_used_in_a_parameter_initializer: DiagnosticMessage;
+        await_expressions_cannot_be_used_in_a_parameter_initializer: DiagnosticMessage;
+        Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value: DiagnosticMessage;
+        A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface: DiagnosticMessage;
+        The_inferred_type_of_0_references_an_inaccessible_1_type_A_type_annotation_is_necessary: DiagnosticMessage;
+        A_module_cannot_have_multiple_default_exports: DiagnosticMessage;
+        Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_functions: DiagnosticMessage;
+        Property_0_is_incompatible_with_index_signature: DiagnosticMessage;
+        Object_is_possibly_null: DiagnosticMessage;
+        Object_is_possibly_undefined: DiagnosticMessage;
+        Object_is_possibly_null_or_undefined: DiagnosticMessage;
+        A_function_returning_never_cannot_have_a_reachable_end_point: DiagnosticMessage;
+        Enum_type_0_has_members_with_initializers_that_are_not_literals: DiagnosticMessage;
+        Type_0_cannot_be_used_to_index_type_1: DiagnosticMessage;
+        Type_0_has_no_matching_index_signature_for_type_1: DiagnosticMessage;
+        Type_0_cannot_be_used_as_an_index_type: DiagnosticMessage;
+        Cannot_assign_to_0_because_it_is_not_a_variable: DiagnosticMessage;
+        Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property: DiagnosticMessage;
+        The_target_of_an_assignment_must_be_a_variable_or_a_property_access: DiagnosticMessage;
+        Index_signature_in_type_0_only_permits_reading: DiagnosticMessage;
+        Duplicate_identifier_newTarget_Compiler_uses_variable_declaration_newTarget_to_capture_new_target_meta_property_reference: DiagnosticMessage;
+        Expression_resolves_to_variable_declaration_newTarget_that_compiler_uses_to_capture_new_target_meta_property_reference: DiagnosticMessage;
+        A_mixin_class_must_have_a_constructor_with_a_single_rest_parameter_of_type_any: DiagnosticMessage;
+        Property_0_has_conflicting_declarations_and_is_inaccessible_in_type_1: DiagnosticMessage;
+        The_type_returned_by_the_next_method_of_an_async_iterator_must_be_a_promise_for_a_type_with_a_value_property: DiagnosticMessage;
+        Type_0_is_not_an_array_type_or_does_not_have_a_Symbol_iterator_method_that_returns_an_iterator: DiagnosticMessage;
+        Type_0_is_not_an_array_type_or_a_string_type_or_does_not_have_a_Symbol_iterator_method_that_returns_an_iterator: DiagnosticMessage;
+        Generic_type_instantiation_is_excessively_deep_and_possibly_infinite: DiagnosticMessage;
+        Property_0_does_not_exist_on_type_1_Did_you_mean_2: DiagnosticMessage;
+        Cannot_find_name_0_Did_you_mean_1: DiagnosticMessage;
+        Computed_values_are_not_permitted_in_an_enum_with_string_valued_members: DiagnosticMessage;
+        Expected_0_arguments_but_got_1: DiagnosticMessage;
+        Expected_at_least_0_arguments_but_got_1: DiagnosticMessage;
+        Expected_0_arguments_but_got_1_or_more: DiagnosticMessage;
+        Expected_at_least_0_arguments_but_got_1_or_more: DiagnosticMessage;
+        Expected_0_type_arguments_but_got_1: DiagnosticMessage;
+        Type_0_has_no_properties_in_common_with_type_1: DiagnosticMessage;
+        Value_of_type_0_has_no_properties_in_common_with_type_1_Did_you_mean_to_call_it: DiagnosticMessage;
+        Object_literal_may_only_specify_known_properties_but_0_does_not_exist_in_type_1_Did_you_mean_to_write_2: DiagnosticMessage;
+        Base_class_expressions_cannot_reference_class_type_parameters: DiagnosticMessage;
+        The_containing_function_or_module_body_is_too_large_for_control_flow_analysis: DiagnosticMessage;
+        Property_0_has_no_initializer_and_is_not_definitely_assigned_in_the_constructor: DiagnosticMessage;
+        Property_0_is_used_before_being_assigned: DiagnosticMessage;
+        A_rest_element_cannot_have_a_property_name: DiagnosticMessage;
+        Enum_declarations_can_only_merge_with_namespace_or_other_enum_declarations: DiagnosticMessage;
+        Type_0_is_not_an_array_type_Use_compiler_option_downlevelIteration_to_allow_iterating_of_iterators: DiagnosticMessage;
+        Type_0_is_not_an_array_type_or_a_string_type_Use_compiler_option_downlevelIteration_to_allow_iterating_of_iterators: DiagnosticMessage;
+        Property_0_does_not_exist_on_type_1_Did_you_forget_to_use_await: DiagnosticMessage;
+        Object_is_of_type_unknown: DiagnosticMessage;
+        JSX_element_attributes_type_0_may_not_be_a_union_type: DiagnosticMessage;
+        The_return_type_of_a_JSX_element_constructor_must_return_an_object_type: DiagnosticMessage;
+        JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist: DiagnosticMessage;
+        Property_0_in_type_1_is_not_assignable_to_type_2: DiagnosticMessage;
+        JSX_element_type_0_does_not_have_any_construct_or_call_signatures: DiagnosticMessage;
+        JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements: DiagnosticMessage;
+        Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property: DiagnosticMessage;
+        JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property: DiagnosticMessage;
+        The_global_type_JSX_0_may_not_have_more_than_one_property: DiagnosticMessage;
+        JSX_spread_child_must_be_an_array_type: DiagnosticMessage;
+        Cannot_augment_module_0_with_value_exports_because_it_resolves_to_a_non_module_entity: DiagnosticMessage;
+        A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums: DiagnosticMessage;
+        Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead: DiagnosticMessage;
+        Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1: DiagnosticMessage;
+        Exported_external_package_typings_file_cannot_contain_tripleslash_references_Please_contact_the_package_author_to_update_the_package_definition: DiagnosticMessage;
+        Exported_external_package_typings_file_0_is_not_a_module_Please_contact_the_package_author_to_update_the_package_definition: DiagnosticMessage;
+        JSX_expressions_must_have_one_parent_element: DiagnosticMessage;
+        Type_0_provides_no_match_for_the_signature_1: DiagnosticMessage;
+        super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_higher: DiagnosticMessage;
+        super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions: DiagnosticMessage;
+        Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module: DiagnosticMessage;
+        Cannot_find_name_0_Did_you_mean_the_static_member_1_0: DiagnosticMessage;
+        Cannot_find_name_0_Did_you_mean_the_instance_member_this_0: DiagnosticMessage;
+        Invalid_module_name_in_augmentation_module_0_cannot_be_found: DiagnosticMessage;
+        Invalid_module_name_in_augmentation_Module_0_resolves_to_an_untyped_module_at_1_which_cannot_be_augmented: DiagnosticMessage;
+        Exports_and_export_assignments_are_not_permitted_in_module_augmentations: DiagnosticMessage;
+        Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_module: DiagnosticMessage;
+        export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always_visible: DiagnosticMessage;
+        Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations: DiagnosticMessage;
+        Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambient_context: DiagnosticMessage;
+        Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity: DiagnosticMessage;
+        Cannot_assign_a_0_constructor_type_to_a_1_constructor_type: DiagnosticMessage;
+        Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration: DiagnosticMessage;
+        Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration: DiagnosticMessage;
+        Cannot_extend_a_class_0_Class_constructor_is_marked_as_private: DiagnosticMessage;
+        Accessors_must_both_be_abstract_or_non_abstract: DiagnosticMessage;
+        A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type: DiagnosticMessage;
+        Type_0_is_not_comparable_to_type_1: DiagnosticMessage;
+        A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void: DiagnosticMessage;
+        A_0_parameter_must_be_the_first_parameter: DiagnosticMessage;
+        A_constructor_cannot_have_a_this_parameter: DiagnosticMessage;
+        get_and_set_accessor_must_have_the_same_this_type: DiagnosticMessage;
+        this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation: DiagnosticMessage;
+        The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1: DiagnosticMessage;
+        The_this_types_of_each_signature_are_incompatible: DiagnosticMessage;
+        _0_refers_to_a_UMD_global_but_the_current_file_is_a_module_Consider_adding_an_import_instead: DiagnosticMessage;
+        All_declarations_of_0_must_have_identical_modifiers: DiagnosticMessage;
+        Cannot_find_type_definition_file_for_0: DiagnosticMessage;
+        Cannot_extend_an_interface_0_Did_you_mean_implements: DiagnosticMessage;
+        An_import_path_cannot_end_with_a_0_extension_Consider_importing_1_instead: DiagnosticMessage;
+        _0_is_a_primitive_but_1_is_a_wrapper_object_Prefer_using_0_when_possible: DiagnosticMessage;
+        _0_only_refers_to_a_type_but_is_being_used_as_a_value_here: DiagnosticMessage;
+        Namespace_0_has_no_exported_member_1: DiagnosticMessage;
+        Left_side_of_comma_operator_is_unused_and_has_no_side_effects: DiagnosticMessage;
+        The_Object_type_is_assignable_to_very_few_other_types_Did_you_mean_to_use_the_any_type_instead: DiagnosticMessage;
+        An_async_function_or_method_must_return_a_Promise_Make_sure_you_have_a_declaration_for_Promise_or_include_ES2015_in_your_lib_option: DiagnosticMessage;
+        Spread_types_may_only_be_created_from_object_types: DiagnosticMessage;
+        Static_property_0_conflicts_with_built_in_property_Function_0_of_constructor_function_1: DiagnosticMessage;
+        Rest_types_may_only_be_created_from_object_types: DiagnosticMessage;
+        The_target_of_an_object_rest_assignment_must_be_a_variable_or_a_property_access: DiagnosticMessage;
+        _0_only_refers_to_a_type_but_is_being_used_as_a_namespace_here: DiagnosticMessage;
+        The_operand_of_a_delete_operator_must_be_a_property_reference: DiagnosticMessage;
+        The_operand_of_a_delete_operator_cannot_be_a_read_only_property: DiagnosticMessage;
+        An_async_function_or_method_in_ES5_SlashES3_requires_the_Promise_constructor_Make_sure_you_have_a_declaration_for_the_Promise_constructor_or_include_ES2015_in_your_lib_option: DiagnosticMessage;
+        Required_type_parameters_may_not_follow_optional_type_parameters: DiagnosticMessage;
+        Generic_type_0_requires_between_1_and_2_type_arguments: DiagnosticMessage;
+        Cannot_use_namespace_0_as_a_value: DiagnosticMessage;
+        Cannot_use_namespace_0_as_a_type: DiagnosticMessage;
+        _0_are_specified_twice_The_attribute_named_0_will_be_overwritten: DiagnosticMessage;
+        A_dynamic_import_call_returns_a_Promise_Make_sure_you_have_a_declaration_for_Promise_or_include_ES2015_in_your_lib_option: DiagnosticMessage;
+        A_dynamic_import_call_in_ES5_SlashES3_requires_the_Promise_constructor_Make_sure_you_have_a_declaration_for_the_Promise_constructor_or_include_ES2015_in_your_lib_option: DiagnosticMessage;
+        Cannot_access_0_1_because_0_is_a_type_but_not_a_namespace_Did_you_mean_to_retrieve_the_type_of_the_property_1_in_0_with_0_1: DiagnosticMessage;
+        The_expression_of_an_export_assignment_must_be_an_identifier_or_qualified_name_in_an_ambient_context: DiagnosticMessage;
+        Abstract_property_0_in_class_1_cannot_be_accessed_in_the_constructor: DiagnosticMessage;
+        Type_parameter_0_has_a_circular_default: DiagnosticMessage;
+        Subsequent_property_declarations_must_have_the_same_type_Property_0_must_be_of_type_1_but_here_has_type_2: DiagnosticMessage;
+        Duplicate_declaration_0: DiagnosticMessage;
+        Type_0_is_not_assignable_to_type_1_Two_different_types_with_this_name_exist_but_they_are_unrelated: DiagnosticMessage;
+        Class_0_incorrectly_implements_class_1_Did_you_mean_to_extend_1_and_inherit_its_members_as_a_subclass: DiagnosticMessage;
+        Cannot_invoke_an_object_which_is_possibly_null: DiagnosticMessage;
+        Cannot_invoke_an_object_which_is_possibly_undefined: DiagnosticMessage;
+        Cannot_invoke_an_object_which_is_possibly_null_or_undefined: DiagnosticMessage;
+        Module_0_has_no_exported_member_1_Did_you_mean_2: DiagnosticMessage;
+        Class_name_cannot_be_Object_when_targeting_ES5_with_module_0: DiagnosticMessage;
+        Cannot_find_lib_definition_for_0: DiagnosticMessage;
+        Cannot_find_lib_definition_for_0_Did_you_mean_1: DiagnosticMessage;
+        Import_declaration_0_is_using_private_name_1: DiagnosticMessage;
+        Type_parameter_0_of_exported_class_has_or_is_using_private_name_1: DiagnosticMessage;
+        Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1: DiagnosticMessage;
+        Type_parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1: DiagnosticMessage;
+        Type_parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1: DiagnosticMessage;
+        Type_parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1: DiagnosticMessage;
+        Type_parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1: DiagnosticMessage;
+        Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1: DiagnosticMessage;
+        Type_parameter_0_of_exported_function_has_or_is_using_private_name_1: DiagnosticMessage;
+        Implements_clause_of_exported_class_0_has_or_is_using_private_name_1: DiagnosticMessage;
+        extends_clause_of_exported_class_0_has_or_is_using_private_name_1: DiagnosticMessage;
+        extends_clause_of_exported_interface_0_has_or_is_using_private_name_1: DiagnosticMessage;
+        Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: DiagnosticMessage;
+        Exported_variable_0_has_or_is_using_name_1_from_private_module_2: DiagnosticMessage;
+        Exported_variable_0_has_or_is_using_private_name_1: DiagnosticMessage;
+        Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: DiagnosticMessage;
+        Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2: DiagnosticMessage;
+        Public_static_property_0_of_exported_class_has_or_is_using_private_name_1: DiagnosticMessage;
+        Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: DiagnosticMessage;
+        Public_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2: DiagnosticMessage;
+        Public_property_0_of_exported_class_has_or_is_using_private_name_1: DiagnosticMessage;
+        Property_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2: DiagnosticMessage;
+        Property_0_of_exported_interface_has_or_is_using_private_name_1: DiagnosticMessage;
+        Parameter_type_of_public_static_setter_0_from_exported_class_has_or_is_using_name_1_from_private_module_2: DiagnosticMessage;
+        Parameter_type_of_public_static_setter_0_from_exported_class_has_or_is_using_private_name_1: DiagnosticMessage;
+        Parameter_type_of_public_setter_0_from_exported_class_has_or_is_using_name_1_from_private_module_2: DiagnosticMessage;
+        Parameter_type_of_public_setter_0_from_exported_class_has_or_is_using_private_name_1: DiagnosticMessage;
+        Return_type_of_public_static_getter_0_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: DiagnosticMessage;
+        Return_type_of_public_static_getter_0_from_exported_class_has_or_is_using_name_1_from_private_module_2: DiagnosticMessage;
+        Return_type_of_public_static_getter_0_from_exported_class_has_or_is_using_private_name_1: DiagnosticMessage;
+        Return_type_of_public_getter_0_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: DiagnosticMessage;
+        Return_type_of_public_getter_0_from_exported_class_has_or_is_using_name_1_from_private_module_2: DiagnosticMessage;
+        Return_type_of_public_getter_0_from_exported_class_has_or_is_using_private_name_1: DiagnosticMessage;
+        Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: DiagnosticMessage;
+        Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_0: DiagnosticMessage;
+        Return_type_of_call_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: DiagnosticMessage;
+        Return_type_of_call_signature_from_exported_interface_has_or_is_using_private_name_0: DiagnosticMessage;
+        Return_type_of_index_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: DiagnosticMessage;
+        Return_type_of_index_signature_from_exported_interface_has_or_is_using_private_name_0: DiagnosticMessage;
+        Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: DiagnosticMessage;
+        Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_private_module_1: DiagnosticMessage;
+        Return_type_of_public_static_method_from_exported_class_has_or_is_using_private_name_0: DiagnosticMessage;
+        Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: DiagnosticMessage;
+        Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_private_module_1: DiagnosticMessage;
+        Return_type_of_public_method_from_exported_class_has_or_is_using_private_name_0: DiagnosticMessage;
+        Return_type_of_method_from_exported_interface_has_or_is_using_name_0_from_private_module_1: DiagnosticMessage;
+        Return_type_of_method_from_exported_interface_has_or_is_using_private_name_0: DiagnosticMessage;
+        Return_type_of_exported_function_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: DiagnosticMessage;
+        Return_type_of_exported_function_has_or_is_using_name_0_from_private_module_1: DiagnosticMessage;
+        Return_type_of_exported_function_has_or_is_using_private_name_0: DiagnosticMessage;
+        Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: DiagnosticMessage;
+        Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_private_module_2: DiagnosticMessage;
+        Parameter_0_of_constructor_from_exported_class_has_or_is_using_private_name_1: DiagnosticMessage;
+        Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2: DiagnosticMessage;
+        Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1: DiagnosticMessage;
+        Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2: DiagnosticMessage;
+        Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1: DiagnosticMessage;
+        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: DiagnosticMessage;
+        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_private_module_2: DiagnosticMessage;
+        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1: DiagnosticMessage;
+        Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: DiagnosticMessage;
+        Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_private_module_2: DiagnosticMessage;
+        Parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1: DiagnosticMessage;
+        Parameter_0_of_method_from_exported_interface_has_or_is_using_name_1_from_private_module_2: DiagnosticMessage;
+        Parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1: DiagnosticMessage;
+        Parameter_0_of_exported_function_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: DiagnosticMessage;
+        Parameter_0_of_exported_function_has_or_is_using_name_1_from_private_module_2: DiagnosticMessage;
+        Parameter_0_of_exported_function_has_or_is_using_private_name_1: DiagnosticMessage;
+        Exported_type_alias_0_has_or_is_using_private_name_1: DiagnosticMessage;
+        Default_export_of_the_module_has_or_is_using_private_name_0: DiagnosticMessage;
+        Type_parameter_0_of_exported_type_alias_has_or_is_using_private_name_1: DiagnosticMessage;
+        Conflicting_definitions_for_0_found_at_1_and_2_Consider_installing_a_specific_version_of_this_library_to_resolve_the_conflict: DiagnosticMessage;
+        Parameter_0_of_index_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2: DiagnosticMessage;
+        Parameter_0_of_index_signature_from_exported_interface_has_or_is_using_private_name_1: DiagnosticMessage;
+        Property_0_of_exported_class_expression_may_not_be_private_or_protected: DiagnosticMessage;
+        Public_static_method_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: DiagnosticMessage;
+        Public_static_method_0_of_exported_class_has_or_is_using_name_1_from_private_module_2: DiagnosticMessage;
+        Public_static_method_0_of_exported_class_has_or_is_using_private_name_1: DiagnosticMessage;
+        Public_method_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: DiagnosticMessage;
+        Public_method_0_of_exported_class_has_or_is_using_name_1_from_private_module_2: DiagnosticMessage;
+        Public_method_0_of_exported_class_has_or_is_using_private_name_1: DiagnosticMessage;
+        Method_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2: DiagnosticMessage;
+        Method_0_of_exported_interface_has_or_is_using_private_name_1: DiagnosticMessage;
+        The_current_host_does_not_support_the_0_option: DiagnosticMessage;
+        Cannot_find_the_common_subdirectory_path_for_the_input_files: DiagnosticMessage;
+        File_specification_cannot_end_in_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0: DiagnosticMessage;
+        Cannot_read_file_0_Colon_1: DiagnosticMessage;
+        Failed_to_parse_file_0_Colon_1: DiagnosticMessage;
+        Unknown_compiler_option_0: DiagnosticMessage;
+        Compiler_option_0_requires_a_value_of_type_1: DiagnosticMessage;
+        Could_not_write_file_0_Colon_1: DiagnosticMessage;
+        Option_project_cannot_be_mixed_with_source_files_on_a_command_line: DiagnosticMessage;
+        Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES2015_or_higher: DiagnosticMessage;
+        Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided: DiagnosticMessage;
+        Option_0_cannot_be_specified_without_specifying_option_1: DiagnosticMessage;
+        Option_0_cannot_be_specified_with_option_1: DiagnosticMessage;
+        A_tsconfig_json_file_is_already_defined_at_Colon_0: DiagnosticMessage;
+        Cannot_write_file_0_because_it_would_overwrite_input_file: DiagnosticMessage;
+        Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files: DiagnosticMessage;
+        Cannot_find_a_tsconfig_json_file_at_the_specified_directory_Colon_0: DiagnosticMessage;
+        The_specified_path_does_not_exist_Colon_0: DiagnosticMessage;
+        Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier: DiagnosticMessage;
+        Option_paths_cannot_be_used_without_specifying_baseUrl_option: DiagnosticMessage;
+        Pattern_0_can_have_at_most_one_Asterisk_character: DiagnosticMessage;
+        Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character: DiagnosticMessage;
+        Substitutions_for_pattern_0_should_be_an_array: DiagnosticMessage;
+        Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2: DiagnosticMessage;
+        File_specification_cannot_contain_a_parent_directory_that_appears_after_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0: DiagnosticMessage;
+        Substitutions_for_pattern_0_shouldn_t_be_an_empty_array: DiagnosticMessage;
+        Invalid_value_for_jsxFactory_0_is_not_a_valid_identifier_or_qualified_name: DiagnosticMessage;
+        Adding_a_tsconfig_json_file_will_help_organize_projects_that_contain_both_TypeScript_and_JavaScript_files_Learn_more_at_https_Colon_Slash_Slashaka_ms_Slashtsconfig: DiagnosticMessage;
+        Option_0_cannot_be_specified_without_specifying_option_1_or_option_2: DiagnosticMessage;
+        Option_resolveJsonModule_cannot_be_specified_without_node_module_resolution_strategy: DiagnosticMessage;
+        Generates_a_sourcemap_for_each_corresponding_d_ts_file: DiagnosticMessage;
+        Concatenate_and_emit_output_to_single_file: DiagnosticMessage;
+        Generates_corresponding_d_ts_file: DiagnosticMessage;
+        Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations: DiagnosticMessage;
+        Specify_the_location_where_debugger_should_locate_TypeScript_files_instead_of_source_locations: DiagnosticMessage;
+        Watch_input_files: DiagnosticMessage;
+        Redirect_output_structure_to_the_directory: DiagnosticMessage;
+        Do_not_erase_const_enum_declarations_in_generated_code: DiagnosticMessage;
+        Do_not_emit_outputs_if_any_errors_were_reported: DiagnosticMessage;
+        Do_not_emit_comments_to_output: DiagnosticMessage;
+        Do_not_emit_outputs: DiagnosticMessage;
+        Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typechecking: DiagnosticMessage;
+        Skip_type_checking_of_declaration_files: DiagnosticMessage;
+        Do_not_resolve_the_real_path_of_symlinks: DiagnosticMessage;
+        Only_emit_d_ts_declaration_files: DiagnosticMessage;
+        Specify_ECMAScript_target_version_Colon_ES3_default_ES5_ES2015_ES2016_ES2017_ES2018_or_ESNEXT: DiagnosticMessage;
+        Specify_module_code_generation_Colon_none_commonjs_amd_system_umd_es2015_or_ESNext: DiagnosticMessage;
+        Print_this_message: DiagnosticMessage;
+        Print_the_compiler_s_version: DiagnosticMessage;
+        Compile_the_project_given_the_path_to_its_configuration_file_or_to_a_folder_with_a_tsconfig_json: DiagnosticMessage;
+        Syntax_Colon_0: DiagnosticMessage;
+        options: DiagnosticMessage;
+        file: DiagnosticMessage;
+        Examples_Colon_0: DiagnosticMessage;
+        Options_Colon: DiagnosticMessage;
+        Version_0: DiagnosticMessage;
+        Insert_command_line_options_and_files_from_a_file: DiagnosticMessage;
+        Starting_compilation_in_watch_mode: DiagnosticMessage;
+        File_change_detected_Starting_incremental_compilation: DiagnosticMessage;
+        KIND: DiagnosticMessage;
+        FILE: DiagnosticMessage;
+        VERSION: DiagnosticMessage;
+        LOCATION: DiagnosticMessage;
+        DIRECTORY: DiagnosticMessage;
+        STRATEGY: DiagnosticMessage;
+        FILE_OR_DIRECTORY: DiagnosticMessage;
+        Generates_corresponding_map_file: DiagnosticMessage;
+        Compiler_option_0_expects_an_argument: DiagnosticMessage;
+        Unterminated_quoted_string_in_response_file_0: DiagnosticMessage;
+        Argument_for_0_option_must_be_Colon_1: DiagnosticMessage;
+        Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1: DiagnosticMessage;
+        Unsupported_locale_0: DiagnosticMessage;
+        Unable_to_open_file_0: DiagnosticMessage;
+        Corrupted_locale_file_0: DiagnosticMessage;
+        Raise_error_on_expressions_and_declarations_with_an_implied_any_type: DiagnosticMessage;
+        File_0_not_found: DiagnosticMessage;
+        File_0_has_unsupported_extension_The_only_supported_extensions_are_1: DiagnosticMessage;
+        Suppress_noImplicitAny_errors_for_indexing_objects_lacking_index_signatures: DiagnosticMessage;
+        Do_not_emit_declarations_for_code_that_has_an_internal_annotation: DiagnosticMessage;
+        Specify_the_root_directory_of_input_files_Use_to_control_the_output_directory_structure_with_outDir: DiagnosticMessage;
+        File_0_is_not_under_rootDir_1_rootDir_is_expected_to_contain_all_source_files: DiagnosticMessage;
+        Specify_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix: DiagnosticMessage;
+        NEWLINE: DiagnosticMessage;
+        Option_0_can_only_be_specified_in_tsconfig_json_file: DiagnosticMessage;
+        Enables_experimental_support_for_ES7_decorators: DiagnosticMessage;
+        Enables_experimental_support_for_emitting_type_metadata_for_decorators: DiagnosticMessage;
+        Enables_experimental_support_for_ES7_async_functions: DiagnosticMessage;
+        Specify_module_resolution_strategy_Colon_node_Node_js_or_classic_TypeScript_pre_1_6: DiagnosticMessage;
+        Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file: DiagnosticMessage;
+        Successfully_created_a_tsconfig_json_file: DiagnosticMessage;
+        Suppress_excess_property_checks_for_object_literals: DiagnosticMessage;
+        Stylize_errors_and_messages_using_color_and_context_experimental: DiagnosticMessage;
+        Do_not_report_errors_on_unused_labels: DiagnosticMessage;
+        Report_error_when_not_all_code_paths_in_function_return_a_value: DiagnosticMessage;
+        Report_errors_for_fallthrough_cases_in_switch_statement: DiagnosticMessage;
+        Do_not_report_errors_on_unreachable_code: DiagnosticMessage;
+        Disallow_inconsistently_cased_references_to_the_same_file: DiagnosticMessage;
+        Specify_library_files_to_be_included_in_the_compilation: DiagnosticMessage;
+        Specify_JSX_code_generation_Colon_preserve_react_native_or_react: DiagnosticMessage;
+        File_0_has_an_unsupported_extension_so_skipping_it: DiagnosticMessage;
+        Only_amd_and_system_modules_are_supported_alongside_0: DiagnosticMessage;
+        Base_directory_to_resolve_non_absolute_module_names: DiagnosticMessage;
+        Deprecated_Use_jsxFactory_instead_Specify_the_object_invoked_for_createElement_when_targeting_react_JSX_emit: DiagnosticMessage;
+        Enable_tracing_of_the_name_resolution_process: DiagnosticMessage;
+        Resolving_module_0_from_1: DiagnosticMessage;
+        Explicitly_specified_module_resolution_kind_Colon_0: DiagnosticMessage;
+        Module_resolution_kind_is_not_specified_using_0: DiagnosticMessage;
+        Module_name_0_was_successfully_resolved_to_1: DiagnosticMessage;
+        Module_name_0_was_not_resolved: DiagnosticMessage;
+        paths_option_is_specified_looking_for_a_pattern_to_match_module_name_0: DiagnosticMessage;
+        Module_name_0_matched_pattern_1: DiagnosticMessage;
+        Trying_substitution_0_candidate_module_location_Colon_1: DiagnosticMessage;
+        Resolving_module_name_0_relative_to_base_url_1_2: DiagnosticMessage;
+        Loading_module_as_file_Slash_folder_candidate_module_location_0_target_file_type_1: DiagnosticMessage;
+        File_0_does_not_exist: DiagnosticMessage;
+        File_0_exist_use_it_as_a_name_resolution_result: DiagnosticMessage;
+        Loading_module_0_from_node_modules_folder_target_file_type_1: DiagnosticMessage;
+        Found_package_json_at_0: DiagnosticMessage;
+        package_json_does_not_have_a_0_field: DiagnosticMessage;
+        package_json_has_0_field_1_that_references_2: DiagnosticMessage;
+        Allow_javascript_files_to_be_compiled: DiagnosticMessage;
+        Option_0_should_have_array_of_strings_as_a_value: DiagnosticMessage;
+        Checking_if_0_is_the_longest_matching_prefix_for_1_2: DiagnosticMessage;
+        Expected_type_of_0_field_in_package_json_to_be_string_got_1: DiagnosticMessage;
+        baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1: DiagnosticMessage;
+        rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0: DiagnosticMessage;
+        Longest_matching_prefix_for_0_is_1: DiagnosticMessage;
+        Loading_0_from_the_root_dir_1_candidate_location_2: DiagnosticMessage;
+        Trying_other_entries_in_rootDirs: DiagnosticMessage;
+        Module_resolution_using_rootDirs_has_failed: DiagnosticMessage;
+        Do_not_emit_use_strict_directives_in_module_output: DiagnosticMessage;
+        Enable_strict_null_checks: DiagnosticMessage;
+        Unknown_option_excludes_Did_you_mean_exclude: DiagnosticMessage;
+        Raise_error_on_this_expressions_with_an_implied_any_type: DiagnosticMessage;
+        Resolving_type_reference_directive_0_containing_file_1_root_directory_2: DiagnosticMessage;
+        Resolving_using_primary_search_paths: DiagnosticMessage;
+        Resolving_from_node_modules_folder: DiagnosticMessage;
+        Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2: DiagnosticMessage;
+        Type_reference_directive_0_was_not_resolved: DiagnosticMessage;
+        Resolving_with_primary_search_path_0: DiagnosticMessage;
+        Root_directory_cannot_be_determined_skipping_primary_search_paths: DiagnosticMessage;
+        Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set: DiagnosticMessage;
+        Type_declaration_files_to_be_included_in_compilation: DiagnosticMessage;
+        Looking_up_in_node_modules_folder_initial_location_0: DiagnosticMessage;
+        Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_modules_folder: DiagnosticMessage;
+        Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1: DiagnosticMessage;
+        Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set: DiagnosticMessage;
+        Resolving_real_path_for_0_result_1: DiagnosticMessage;
+        Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system: DiagnosticMessage;
+        File_name_0_has_a_1_extension_stripping_it: DiagnosticMessage;
+        _0_is_declared_but_its_value_is_never_read: DiagnosticMessage;
+        Report_errors_on_unused_locals: DiagnosticMessage;
+        Report_errors_on_unused_parameters: DiagnosticMessage;
+        The_maximum_dependency_depth_to_search_under_node_modules_and_load_JavaScript_files: DiagnosticMessage;
+        Cannot_import_type_declaration_files_Consider_importing_0_instead_of_1: DiagnosticMessage;
+        Property_0_is_declared_but_its_value_is_never_read: DiagnosticMessage;
+        Import_emit_helpers_from_tslib: DiagnosticMessage;
+        Auto_discovery_for_typings_is_enabled_in_project_0_Running_extra_resolution_pass_for_module_1_using_cache_location_2: DiagnosticMessage;
+        Parse_in_strict_mode_and_emit_use_strict_for_each_source_file: DiagnosticMessage;
+        Module_0_was_resolved_to_1_but_jsx_is_not_set: DiagnosticMessage;
+        Module_0_was_resolved_as_locally_declared_ambient_module_in_file_1: DiagnosticMessage;
+        Module_0_was_resolved_as_ambient_module_declared_in_1_since_this_file_was_not_modified: DiagnosticMessage;
+        Specify_the_JSX_factory_function_to_use_when_targeting_react_JSX_emit_e_g_React_createElement_or_h: DiagnosticMessage;
+        Resolution_for_module_0_was_found_in_cache_from_location_1: DiagnosticMessage;
+        Directory_0_does_not_exist_skipping_all_lookups_in_it: DiagnosticMessage;
+        Show_diagnostic_information: DiagnosticMessage;
+        Show_verbose_diagnostic_information: DiagnosticMessage;
+        Emit_a_single_file_with_source_maps_instead_of_having_a_separate_file: DiagnosticMessage;
+        Emit_the_source_alongside_the_sourcemaps_within_a_single_file_requires_inlineSourceMap_or_sourceMap_to_be_set: DiagnosticMessage;
+        Transpile_each_file_as_a_separate_module_similar_to_ts_transpileModule: DiagnosticMessage;
+        Print_names_of_generated_files_part_of_the_compilation: DiagnosticMessage;
+        Print_names_of_files_part_of_the_compilation: DiagnosticMessage;
+        The_locale_used_when_displaying_messages_to_the_user_e_g_en_us: DiagnosticMessage;
+        Do_not_generate_custom_helper_functions_like_extends_in_compiled_output: DiagnosticMessage;
+        Do_not_include_the_default_library_file_lib_d_ts: DiagnosticMessage;
+        Do_not_add_triple_slash_references_or_imported_modules_to_the_list_of_compiled_files: DiagnosticMessage;
+        Deprecated_Use_skipLibCheck_instead_Skip_type_checking_of_default_library_declaration_files: DiagnosticMessage;
+        List_of_folders_to_include_type_definitions_from: DiagnosticMessage;
+        Disable_size_limitations_on_JavaScript_projects: DiagnosticMessage;
+        The_character_set_of_the_input_files: DiagnosticMessage;
+        Emit_a_UTF_8_Byte_Order_Mark_BOM_in_the_beginning_of_output_files: DiagnosticMessage;
+        Do_not_truncate_error_messages: DiagnosticMessage;
+        Output_directory_for_generated_declaration_files: DiagnosticMessage;
+        A_series_of_entries_which_re_map_imports_to_lookup_locations_relative_to_the_baseUrl: DiagnosticMessage;
+        List_of_root_folders_whose_combined_content_represents_the_structure_of_the_project_at_runtime: DiagnosticMessage;
+        Show_all_compiler_options: DiagnosticMessage;
+        Deprecated_Use_outFile_instead_Concatenate_and_emit_output_to_single_file: DiagnosticMessage;
+        Command_line_Options: DiagnosticMessage;
+        Basic_Options: DiagnosticMessage;
+        Strict_Type_Checking_Options: DiagnosticMessage;
+        Module_Resolution_Options: DiagnosticMessage;
+        Source_Map_Options: DiagnosticMessage;
+        Additional_Checks: DiagnosticMessage;
+        Experimental_Options: DiagnosticMessage;
+        Advanced_Options: DiagnosticMessage;
+        Provide_full_support_for_iterables_in_for_of_spread_and_destructuring_when_targeting_ES5_or_ES3: DiagnosticMessage;
+        Enable_all_strict_type_checking_options: DiagnosticMessage;
+        List_of_language_service_plugins: DiagnosticMessage;
+        Scoped_package_detected_looking_in_0: DiagnosticMessage;
+        Reusing_resolution_of_module_0_to_file_1_from_old_program: DiagnosticMessage;
+        Reusing_module_resolutions_originating_in_0_since_resolutions_are_unchanged_from_old_program: DiagnosticMessage;
+        Disable_strict_checking_of_generic_signatures_in_function_types: DiagnosticMessage;
+        Enable_strict_checking_of_function_types: DiagnosticMessage;
+        Enable_strict_checking_of_property_initialization_in_classes: DiagnosticMessage;
+        Numeric_separators_are_not_allowed_here: DiagnosticMessage;
+        Multiple_consecutive_numeric_separators_are_not_permitted: DiagnosticMessage;
+        Found_package_json_at_0_Package_ID_is_1: DiagnosticMessage;
+        Whether_to_keep_outdated_console_output_in_watch_mode_instead_of_clearing_the_screen: DiagnosticMessage;
+        All_imports_in_import_declaration_are_unused: DiagnosticMessage;
+        Found_1_error_Watching_for_file_changes: DiagnosticMessage;
+        Found_0_errors_Watching_for_file_changes: DiagnosticMessage;
+        Resolve_keyof_to_string_valued_property_names_only_no_numbers_or_symbols: DiagnosticMessage;
+        _0_is_declared_but_never_used: DiagnosticMessage;
+        Include_modules_imported_with_json_extension: DiagnosticMessage;
+        All_destructured_elements_are_unused: DiagnosticMessage;
+        All_variables_are_unused: DiagnosticMessage;
+        Projects_to_reference: DiagnosticMessage;
+        Enable_project_compilation: DiagnosticMessage;
+        Project_references_may_not_form_a_circular_graph_Cycle_detected_Colon_0: DiagnosticMessage;
+        Composite_projects_may_not_disable_declaration_emit: DiagnosticMessage;
+        Output_file_0_has_not_been_built_from_source_file_1: DiagnosticMessage;
+        Referenced_project_0_must_have_setting_composite_Colon_true: DiagnosticMessage;
+        File_0_is_not_in_project_file_list_Projects_must_list_all_files_or_use_an_include_pattern: DiagnosticMessage;
+        Cannot_prepend_project_0_because_it_does_not_have_outFile_set: DiagnosticMessage;
+        Output_file_0_from_project_1_does_not_exist: DiagnosticMessage;
+        Project_0_is_out_of_date_because_oldest_output_1_is_older_than_newest_input_2: DiagnosticMessage;
+        Project_0_is_up_to_date_because_newest_input_1_is_older_than_oldest_output_2: DiagnosticMessage;
+        Project_0_is_out_of_date_because_output_file_1_does_not_exist: DiagnosticMessage;
+        Project_0_is_out_of_date_because_its_dependency_1_is_out_of_date: DiagnosticMessage;
+        Project_0_is_up_to_date_with_d_ts_files_from_its_dependencies: DiagnosticMessage;
+        Projects_in_this_build_Colon_0: DiagnosticMessage;
+        A_non_dry_build_would_delete_the_following_files_Colon_0: DiagnosticMessage;
+        A_non_dry_build_would_build_project_0: DiagnosticMessage;
+        Building_project_0: DiagnosticMessage;
+        Updating_output_timestamps_of_project_0: DiagnosticMessage;
+        delete_this_Project_0_is_up_to_date_because_it_was_previously_built: DiagnosticMessage;
+        Project_0_is_up_to_date: DiagnosticMessage;
+        Skipping_build_of_project_0_because_its_dependency_1_has_errors: DiagnosticMessage;
+        Project_0_can_t_be_built_because_its_dependency_1_has_errors: DiagnosticMessage;
+        Build_one_or_more_projects_and_their_dependencies_if_out_of_date: DiagnosticMessage;
+        Delete_the_outputs_of_all_projects: DiagnosticMessage;
+        Enable_verbose_logging: DiagnosticMessage;
+        Show_what_would_be_built_or_deleted_if_specified_with_clean: DiagnosticMessage;
+        Build_all_projects_including_those_that_appear_to_be_up_to_date: DiagnosticMessage;
+        Option_build_must_be_the_first_command_line_argument: DiagnosticMessage;
+        Options_0_and_1_cannot_be_combined: DiagnosticMessage;
+        Skipping_clean_because_not_all_projects_could_be_located: DiagnosticMessage;
+        Variable_0_implicitly_has_an_1_type: DiagnosticMessage;
+        Parameter_0_implicitly_has_an_1_type: DiagnosticMessage;
+        Member_0_implicitly_has_an_1_type: DiagnosticMessage;
+        new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type: DiagnosticMessage;
+        _0_which_lacks_return_type_annotation_implicitly_has_an_1_return_type: DiagnosticMessage;
+        Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type: DiagnosticMessage;
+        Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type: DiagnosticMessage;
+        Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number: DiagnosticMessage;
+        Could_not_find_a_declaration_file_for_module_0_1_implicitly_has_an_any_type: DiagnosticMessage;
+        Element_implicitly_has_an_any_type_because_type_0_has_no_index_signature: DiagnosticMessage;
+        Object_literal_s_property_0_implicitly_has_an_1_type: DiagnosticMessage;
+        Rest_parameter_0_implicitly_has_an_any_type: DiagnosticMessage;
+        Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type: DiagnosticMessage;
+        _0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or_indirectly_in_its_own_initializer: DiagnosticMessage;
+        _0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions: DiagnosticMessage;
+        Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions: DiagnosticMessage;
+        Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_type: DiagnosticMessage;
+        JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists: DiagnosticMessage;
+        Unreachable_code_detected: DiagnosticMessage;
+        Unused_label: DiagnosticMessage;
+        Fallthrough_case_in_switch: DiagnosticMessage;
+        Not_all_code_paths_return_a_value: DiagnosticMessage;
+        Binding_element_0_implicitly_has_an_1_type: DiagnosticMessage;
+        Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_parameter_type_annotation: DiagnosticMessage;
+        Property_0_implicitly_has_type_any_because_its_get_accessor_lacks_a_return_type_annotation: DiagnosticMessage;
+        Variable_0_implicitly_has_type_1_in_some_locations_where_its_type_cannot_be_determined: DiagnosticMessage;
+        Try_npm_install_types_Slash_0_if_it_exists_or_add_a_new_declaration_d_ts_file_containing_declare_module_0: DiagnosticMessage;
+        Dynamic_import_s_specifier_must_be_of_type_string_but_here_has_type_0: DiagnosticMessage;
+        Enables_emit_interoperability_between_CommonJS_and_ES_Modules_via_creation_of_namespace_objects_for_all_imports_Implies_allowSyntheticDefaultImports: DiagnosticMessage;
+        A_namespace_style_import_cannot_be_called_or_constructed_and_will_cause_a_failure_at_runtime: DiagnosticMessage;
+        Mapped_object_type_implicitly_has_an_any_template_type: DiagnosticMessage;
+        You_cannot_rename_this_element: DiagnosticMessage;
+        You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library: DiagnosticMessage;
+        import_can_only_be_used_in_a_ts_file: DiagnosticMessage;
+        export_can_only_be_used_in_a_ts_file: DiagnosticMessage;
+        type_parameter_declarations_can_only_be_used_in_a_ts_file: DiagnosticMessage;
+        implements_clauses_can_only_be_used_in_a_ts_file: DiagnosticMessage;
+        interface_declarations_can_only_be_used_in_a_ts_file: DiagnosticMessage;
+        module_declarations_can_only_be_used_in_a_ts_file: DiagnosticMessage;
+        type_aliases_can_only_be_used_in_a_ts_file: DiagnosticMessage;
+        _0_can_only_be_used_in_a_ts_file: DiagnosticMessage;
+        types_can_only_be_used_in_a_ts_file: DiagnosticMessage;
+        type_arguments_can_only_be_used_in_a_ts_file: DiagnosticMessage;
+        parameter_modifiers_can_only_be_used_in_a_ts_file: DiagnosticMessage;
+        non_null_assertions_can_only_be_used_in_a_ts_file: DiagnosticMessage;
+        enum_declarations_can_only_be_used_in_a_ts_file: DiagnosticMessage;
+        type_assertion_expressions_can_only_be_used_in_a_ts_file: DiagnosticMessage;
+        Octal_literal_types_must_use_ES2015_syntax_Use_the_syntax_0: DiagnosticMessage;
+        Octal_literals_are_not_allowed_in_enums_members_initializer_Use_the_syntax_0: DiagnosticMessage;
+        Report_errors_in_js_files: DiagnosticMessage;
+        JSDoc_types_can_only_be_used_inside_documentation_comments: DiagnosticMessage;
+        JSDoc_typedef_tag_should_either_have_a_type_annotation_or_be_followed_by_property_or_member_tags: DiagnosticMessage;
+        JSDoc_0_is_not_attached_to_a_class: DiagnosticMessage;
+        JSDoc_0_1_does_not_match_the_extends_2_clause: DiagnosticMessage;
+        JSDoc_param_tag_has_name_0_but_there_is_no_parameter_with_that_name: DiagnosticMessage;
+        Class_declarations_cannot_have_more_than_one_augments_or_extends_tag: DiagnosticMessage;
+        Expected_0_type_arguments_provide_these_with_an_extends_tag: DiagnosticMessage;
+        Expected_0_1_type_arguments_provide_these_with_an_extends_tag: DiagnosticMessage;
+        JSDoc_may_only_appear_in_the_last_parameter_of_a_signature: DiagnosticMessage;
+        JSDoc_param_tag_has_name_0_but_there_is_no_parameter_with_that_name_It_would_match_arguments_if_it_had_an_array_type: DiagnosticMessage;
+        Only_identifiers_Slashqualified_names_with_optional_type_arguments_are_currently_supported_in_a_class_extends_clause: DiagnosticMessage;
+        class_expressions_are_not_currently_supported: DiagnosticMessage;
+        Language_service_is_disabled: DiagnosticMessage;
+        JSX_attributes_must_only_be_assigned_a_non_empty_expression: DiagnosticMessage;
+        JSX_elements_cannot_have_multiple_attributes_with_the_same_name: DiagnosticMessage;
+        Expected_corresponding_JSX_closing_tag_for_0: DiagnosticMessage;
+        JSX_attribute_expected: DiagnosticMessage;
+        Cannot_use_JSX_unless_the_jsx_flag_is_provided: DiagnosticMessage;
+        A_constructor_cannot_contain_a_super_call_when_its_class_extends_null: DiagnosticMessage;
+        An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses: DiagnosticMessage;
+        A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses: DiagnosticMessage;
+        JSX_element_0_has_no_corresponding_closing_tag: DiagnosticMessage;
+        super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class: DiagnosticMessage;
+        Unknown_type_acquisition_option_0: DiagnosticMessage;
+        super_must_be_called_before_accessing_a_property_of_super_in_the_constructor_of_a_derived_class: DiagnosticMessage;
+        _0_is_not_a_valid_meta_property_for_keyword_1_Did_you_mean_2: DiagnosticMessage;
+        Meta_property_0_is_only_allowed_in_the_body_of_a_function_declaration_function_expression_or_constructor: DiagnosticMessage;
+        JSX_fragment_has_no_corresponding_closing_tag: DiagnosticMessage;
+        Expected_corresponding_closing_tag_for_JSX_fragment: DiagnosticMessage;
+        JSX_fragment_is_not_supported_when_using_jsxFactory: DiagnosticMessage;
+        JSX_fragment_is_not_supported_when_using_an_inline_JSX_factory_pragma: DiagnosticMessage;
+        Circularity_detected_while_resolving_configuration_Colon_0: DiagnosticMessage;
+        A_path_in_an_extends_option_must_be_relative_or_rooted_but_0_is_not: DiagnosticMessage;
+        The_files_list_in_config_file_0_is_empty: DiagnosticMessage;
+        No_inputs_were_found_in_config_file_0_Specified_include_paths_were_1_and_exclude_paths_were_2: DiagnosticMessage;
+        File_is_a_CommonJS_module_it_may_be_converted_to_an_ES6_module: DiagnosticMessage;
+        This_constructor_function_may_be_converted_to_a_class_declaration: DiagnosticMessage;
+        Import_may_be_converted_to_a_default_import: DiagnosticMessage;
+        JSDoc_types_may_be_moved_to_TypeScript_types: DiagnosticMessage;
+        require_call_may_be_converted_to_an_import: DiagnosticMessage;
+        Add_missing_super_call: DiagnosticMessage;
+        Make_super_call_the_first_statement_in_the_constructor: DiagnosticMessage;
+        Change_extends_to_implements: DiagnosticMessage;
+        Remove_declaration_for_Colon_0: DiagnosticMessage;
+        Remove_import_from_0: DiagnosticMessage;
+        Implement_interface_0: DiagnosticMessage;
+        Implement_inherited_abstract_class: DiagnosticMessage;
+        Add_0_to_unresolved_variable: DiagnosticMessage;
+        Remove_destructuring: DiagnosticMessage;
+        Remove_variable_statement: DiagnosticMessage;
+        Import_0_from_module_1: DiagnosticMessage;
+        Change_0_to_1: DiagnosticMessage;
+        Add_0_to_existing_import_declaration_from_1: DiagnosticMessage;
+        Declare_property_0: DiagnosticMessage;
+        Add_index_signature_for_property_0: DiagnosticMessage;
+        Disable_checking_for_this_file: DiagnosticMessage;
+        Ignore_this_error_message: DiagnosticMessage;
+        Initialize_property_0_in_the_constructor: DiagnosticMessage;
+        Initialize_static_property_0: DiagnosticMessage;
+        Change_spelling_to_0: DiagnosticMessage;
+        Declare_method_0: DiagnosticMessage;
+        Declare_static_method_0: DiagnosticMessage;
+        Prefix_0_with_an_underscore: DiagnosticMessage;
+        Rewrite_as_the_indexed_access_type_0: DiagnosticMessage;
+        Declare_static_property_0: DiagnosticMessage;
+        Call_decorator_expression: DiagnosticMessage;
+        Add_async_modifier_to_containing_function: DiagnosticMessage;
+        Convert_function_to_an_ES2015_class: DiagnosticMessage;
+        Convert_function_0_to_class: DiagnosticMessage;
+        Extract_to_0_in_1: DiagnosticMessage;
+        Extract_function: DiagnosticMessage;
+        Extract_constant: DiagnosticMessage;
+        Extract_to_0_in_enclosing_scope: DiagnosticMessage;
+        Extract_to_0_in_1_scope: DiagnosticMessage;
+        Annotate_with_type_from_JSDoc: DiagnosticMessage;
+        Annotate_with_types_from_JSDoc: DiagnosticMessage;
+        Infer_type_of_0_from_usage: DiagnosticMessage;
+        Infer_parameter_types_from_usage: DiagnosticMessage;
+        Convert_to_default_import: DiagnosticMessage;
+        Install_0: DiagnosticMessage;
+        Replace_import_with_0: DiagnosticMessage;
+        Use_synthetic_default_member: DiagnosticMessage;
+        Convert_to_ES6_module: DiagnosticMessage;
+        Add_undefined_type_to_property_0: DiagnosticMessage;
+        Add_initializer_to_property_0: DiagnosticMessage;
+        Add_definite_assignment_assertion_to_property_0: DiagnosticMessage;
+        Add_all_missing_members: DiagnosticMessage;
+        Infer_all_types_from_usage: DiagnosticMessage;
+        Delete_all_unused_declarations: DiagnosticMessage;
+        Prefix_all_unused_declarations_with_where_possible: DiagnosticMessage;
+        Fix_all_detected_spelling_errors: DiagnosticMessage;
+        Add_initializers_to_all_uninitialized_properties: DiagnosticMessage;
+        Add_definite_assignment_assertions_to_all_uninitialized_properties: DiagnosticMessage;
+        Add_undefined_type_to_all_uninitialized_properties: DiagnosticMessage;
+        Change_all_jsdoc_style_types_to_TypeScript: DiagnosticMessage;
+        Change_all_jsdoc_style_types_to_TypeScript_and_add_undefined_to_nullable_types: DiagnosticMessage;
+        Implement_all_unimplemented_interfaces: DiagnosticMessage;
+        Install_all_missing_types_packages: DiagnosticMessage;
+        Rewrite_all_as_indexed_access_types: DiagnosticMessage;
+        Convert_all_to_default_imports: DiagnosticMessage;
+        Make_all_super_calls_the_first_statement_in_their_constructor: DiagnosticMessage;
+        Add_qualifier_to_all_unresolved_variables_matching_a_member_name: DiagnosticMessage;
+        Change_all_extended_interfaces_to_implements: DiagnosticMessage;
+        Add_all_missing_super_calls: DiagnosticMessage;
+        Implement_all_inherited_abstract_classes: DiagnosticMessage;
+        Add_all_missing_async_modifiers: DiagnosticMessage;
+        Add_ts_ignore_to_all_error_messages: DiagnosticMessage;
+        Annotate_everything_with_types_from_JSDoc: DiagnosticMessage;
+        Add_to_all_uncalled_decorators: DiagnosticMessage;
+        Convert_all_constructor_functions_to_classes: DiagnosticMessage;
+        Generate_get_and_set_accessors: DiagnosticMessage;
+        Convert_require_to_import: DiagnosticMessage;
+        Convert_all_require_to_import: DiagnosticMessage;
+        Move_to_a_new_file: DiagnosticMessage;
+        Remove_unreachable_code: DiagnosticMessage;
+        Remove_all_unreachable_code: DiagnosticMessage;
+        Add_missing_typeof: DiagnosticMessage;
+        Remove_unused_label: DiagnosticMessage;
+        Remove_all_unused_labels: DiagnosticMessage;
+        Convert_0_to_mapped_object_type: DiagnosticMessage;
+        Convert_namespace_import_to_named_imports: DiagnosticMessage;
+        Convert_named_imports_to_namespace_import: DiagnosticMessage;
+        Add_or_remove_braces_in_an_arrow_function: DiagnosticMessage;
+        Add_braces_to_arrow_function: DiagnosticMessage;
+        Remove_braces_from_arrow_function: DiagnosticMessage;
+    };
+}
 declare namespace ts {
     type ErrorCallback = (message: DiagnosticMessage, length: number) => void;
+    function tokenIsIdentifierOrKeyword(token: SyntaxKind): boolean;
+    function tokenIsIdentifierOrKeywordOrGreaterThan(token: SyntaxKind): boolean;
     interface Scanner {
         getStartPos(): number;
         getToken(): SyntaxKind;
@@ -3058,6 +5918,7 @@ declare namespace ts {
         isIdentifier(): boolean;
         isReservedWord(): boolean;
         isUnterminated(): boolean;
+        getTokenFlags(): TokenFlags;
         reScanGreaterToken(): SyntaxKind;
         reScanSlashToken(): SyntaxKind;
         reScanTemplateToken(): SyntaxKind;
@@ -3077,14 +5938,25 @@ declare namespace ts {
         scanRange<T>(start: number, length: number, callback: () => T): T;
         tryScan<T>(callback: () => T): T;
     }
+    function isUnicodeIdentifierStart(code: number, languageVersion: ScriptTarget | undefined): boolean;
     function tokenToString(t: SyntaxKind): string | undefined;
+    function stringToToken(s: string): SyntaxKind | undefined;
+    function computeLineStarts(text: string): number[];
     function getPositionOfLineAndCharacter(sourceFile: SourceFileLike, line: number, character: number): number;
+    function computePositionOfLineAndCharacter(lineStarts: ReadonlyArray<number>, line: number, character: number, debugText?: string): number;
+    function getLineStarts(sourceFile: SourceFileLike): ReadonlyArray<number>;
+    /**
+     * We assume the first line starts at position 0 and 'position' is non-negative.
+     */
+    function computeLineAndCharacterOfPosition(lineStarts: ReadonlyArray<number>, position: number): LineAndCharacter;
     function getLineAndCharacterOfPosition(sourceFile: SourceFileLike, position: number): LineAndCharacter;
     function isWhiteSpaceLike(ch: number): boolean;
     /** Does not include line breaks. For that, see isWhiteSpaceLike. */
     function isWhiteSpaceSingleLine(ch: number): boolean;
     function isLineBreak(ch: number): boolean;
+    function isOctalDigit(ch: number): boolean;
     function couldStartTrivia(text: string, pos: number): boolean;
+    function skipTrivia(text: string, pos: number, stopAfterLineBreak?: boolean, stopAtComments?: boolean): number;
     function forEachLeadingCommentRange<U>(text: string, pos: number, cb: (pos: number, end: number, kind: CommentKind, hasTrailingNewLine: boolean) => U): U | undefined;
     function forEachLeadingCommentRange<T, U>(text: string, pos: number, cb: (pos: number, end: number, kind: CommentKind, hasTrailingNewLine: boolean, state: T) => U, state: T): U | undefined;
     function forEachTrailingCommentRange<U>(text: string, pos: number, cb: (pos: number, end: number, kind: CommentKind, hasTrailingNewLine: boolean) => U): U | undefined;
@@ -3097,8 +5969,628 @@ declare namespace ts {
     function getShebang(text: string): string | undefined;
     function isIdentifierStart(ch: number, languageVersion: ScriptTarget | undefined): boolean;
     function isIdentifierPart(ch: number, languageVersion: ScriptTarget | undefined): boolean;
+    function isIdentifierText(name: string, languageVersion: ScriptTarget | undefined): boolean;
     function createScanner(languageVersion: ScriptTarget, skipTrivia: boolean, languageVariant?: LanguageVariant, textInitial?: string, onError?: ErrorCallback, start?: number, length?: number): Scanner;
 }
+/** Non-internal stuff goes here */
+declare namespace ts {
+    function isExternalModuleNameRelative(moduleName: string): boolean;
+    function sortAndDeduplicateDiagnostics<T extends Diagnostic>(diagnostics: ReadonlyArray<T>): T[];
+}
+declare namespace ts {
+    const emptyArray: never[];
+    const resolvingEmptyArray: never[];
+    const emptyMap: ReadonlyMap<never>;
+    const emptyUnderscoreEscapedMap: ReadonlyUnderscoreEscapedMap<never>;
+    const externalHelpersModuleNameText = "tslib";
+    function getDeclarationOfKind<T extends Declaration>(symbol: Symbol, kind: T["kind"]): T | undefined;
+    /** Create a new escaped identifier map. */
+    function createUnderscoreEscapedMap<T>(): UnderscoreEscapedMap<T>;
+    function hasEntries(map: ReadonlyUnderscoreEscapedMap<any> | undefined): map is ReadonlyUnderscoreEscapedMap<any>;
+    function createSymbolTable(symbols?: ReadonlyArray<Symbol>): SymbolTable;
+    function toPath(fileName: string, basePath: string | undefined, getCanonicalFileName: (path: string) => string): Path;
+    function changesAffectModuleResolution(oldOptions: CompilerOptions, newOptions: CompilerOptions): boolean;
+    /**
+     * Iterates through the parent chain of a node and performs the callback on each parent until the callback
+     * returns a truthy value, then returns that value.
+     * If no such value is found, it applies the callback until the parent pointer is undefined or the callback returns "quit"
+     * At that point findAncestor returns undefined.
+     */
+    function findAncestor<T extends Node>(node: Node | undefined, callback: (element: Node) => element is T): T | undefined;
+    function findAncestor(node: Node | undefined, callback: (element: Node) => boolean | "quit"): Node | undefined;
+    /**
+     * Calls `callback` for each entry in the map, returning the first truthy result.
+     * Use `map.forEach` instead for normal iteration.
+     */
+    function forEachEntry<T, U>(map: ReadonlyUnderscoreEscapedMap<T>, callback: (value: T, key: __String) => U | undefined): U | undefined;
+    function forEachEntry<T, U>(map: ReadonlyMap<T>, callback: (value: T, key: string) => U | undefined): U | undefined;
+    /** `forEachEntry` for just keys. */
+    function forEachKey<T>(map: ReadonlyUnderscoreEscapedMap<{}>, callback: (key: __String) => T | undefined): T | undefined;
+    function forEachKey<T>(map: ReadonlyMap<{}>, callback: (key: string) => T | undefined): T | undefined;
+    /** Copy entries from `source` to `target`. */
+    function copyEntries<T>(source: ReadonlyUnderscoreEscapedMap<T>, target: UnderscoreEscapedMap<T>): void;
+    function copyEntries<T>(source: ReadonlyMap<T>, target: Map<T>): void;
+    /**
+     * Creates a set from the elements of an array.
+     *
+     * @param array the array of input elements.
+     */
+    function arrayToSet(array: ReadonlyArray<string>): Map<true>;
+    function arrayToSet<T>(array: ReadonlyArray<T>, makeKey: (value: T) => string | undefined): Map<true>;
+    function arrayToSet<T>(array: ReadonlyArray<T>, makeKey: (value: T) => __String | undefined): UnderscoreEscapedMap<true>;
+    function cloneMap(map: SymbolTable): SymbolTable;
+    function cloneMap<T>(map: ReadonlyMap<T>): Map<T>;
+    function cloneMap<T>(map: ReadonlyUnderscoreEscapedMap<T>): UnderscoreEscapedMap<T>;
+    function usingSingleLineStringWriter(action: (writer: EmitTextWriter) => void): string;
+    function getFullWidth(node: Node): number;
+    function getResolvedModule(sourceFile: SourceFile, moduleNameText: string): ResolvedModuleFull | undefined;
+    function setResolvedModule(sourceFile: SourceFile, moduleNameText: string, resolvedModule: ResolvedModuleFull): void;
+    function setResolvedTypeReferenceDirective(sourceFile: SourceFile, typeReferenceDirectiveName: string, resolvedTypeReferenceDirective: ResolvedTypeReferenceDirective): void;
+    function moduleResolutionIsEqualTo(oldResolution: ResolvedModuleFull, newResolution: ResolvedModuleFull): boolean;
+    function packageIdToString({ name, subModuleName, version }: PackageId): string;
+    function typeDirectiveIsEqualTo(oldResolution: ResolvedTypeReferenceDirective, newResolution: ResolvedTypeReferenceDirective): boolean;
+    function hasChangesInResolutions<T>(names: ReadonlyArray<string>, newResolutions: ReadonlyArray<T>, oldResolutions: ReadonlyMap<T> | undefined, comparer: (oldResolution: T, newResolution: T) => boolean): boolean;
+    function containsParseError(node: Node): boolean;
+    function getSourceFileOfNode(node: Node): SourceFile;
+    function getSourceFileOfNode(node: Node | undefined): SourceFile | undefined;
+    function isStatementWithLocals(node: Node): boolean;
+    function getStartPositionOfLine(line: number, sourceFile: SourceFileLike): number;
+    function nodePosToString(node: Node): string;
+    function getEndLinePosition(line: number, sourceFile: SourceFileLike): number;
+    /**
+     * Returns a value indicating whether a name is unique globally or within the current file.
+     * Note: This does not consider whether a name appears as a free identifier or not, so at the expression `x.y` this includes both `x` and `y`.
+     */
+    function isFileLevelUniqueName(sourceFile: SourceFile, name: string, hasGlobalName?: PrintHandlers["hasGlobalName"]): boolean;
+    function nodeIsMissing(node: Node | undefined): boolean;
+    function nodeIsPresent(node: Node | undefined): boolean;
+    /**
+     * Appends a range of value to begin of an array, returning the array.
+     *
+     * @param to The array to which `value` is to be appended. If `to` is `undefined`, a new array
+     * is created if `value` was appended.
+     * @param from The values to append to the array. If `from` is `undefined`, nothing is
+     * appended. If an element of `from` is `undefined`, that element is not appended.
+     */
+    function prependStatements<T extends Statement>(to: T[], from: ReadonlyArray<T> | undefined): T[] | undefined;
+    /**
+     * Determine if the given comment is a triple-slash
+     *
+     * @return true if the comment is a triple-slash comment else false
+     */
+    function isRecognizedTripleSlashComment(text: string, commentPos: number, commentEnd: number): boolean;
+    function isPinnedComment(text: string, start: number): boolean;
+    function getTokenPosOfNode(node: Node, sourceFile?: SourceFileLike, includeJsDoc?: boolean): number;
+    function getNonDecoratorTokenPosOfNode(node: Node, sourceFile?: SourceFileLike): number;
+    function getSourceTextOfNodeFromSourceFile(sourceFile: SourceFile, node: Node, includeTrivia?: boolean): string;
+    function getTextOfNodeFromSourceText(sourceText: string, node: Node, includeTrivia?: boolean): string;
+    function getTextOfNode(node: Node, includeTrivia?: boolean): string;
+    /**
+     * Note: it is expected that the `nodeArray` and the `node` are within the same file.
+     * For example, searching for a `SourceFile` in a `SourceFile[]` wouldn't work.
+     */
+    function indexOfNode(nodeArray: ReadonlyArray<Node>, node: Node): number;
+    /**
+     * Gets flags that control emit behavior of a node.
+     */
+    function getEmitFlags(node: Node): EmitFlags;
+    function getLiteralText(node: LiteralLikeNode, sourceFile: SourceFile): string;
+    function getTextOfConstantValue(value: string | number): string;
+    function escapeLeadingUnderscores(identifier: string): __String;
+    /**
+     * @deprecated Use `id.escapedText` to get the escaped text of an Identifier.
+     * @param identifier The identifier to escape
+     */
+    function escapeIdentifier(identifier: string): string;
+    function makeIdentifierFromModuleName(moduleName: string): string;
+    function isBlockOrCatchScoped(declaration: Declaration): boolean;
+    function isCatchClauseVariableDeclarationOrBindingElement(declaration: Declaration): boolean;
+    function isAmbientModule(node: Node): node is AmbientModuleDeclaration;
+    function isModuleWithStringLiteralName(node: Node): node is ModuleDeclaration;
+    function isNonGlobalAmbientModule(node: Node): node is ModuleDeclaration & {
+        name: StringLiteral;
+    };
+    /**
+     * An effective module (namespace) declaration is either
+     * 1. An actual declaration: namespace X { ... }
+     * 2. A Javascript declaration, which is:
+     *    An identifier in a nested property access expression: Y in `X.Y.Z = { ... }`
+     */
+    function isEffectiveModuleDeclaration(node: Node): boolean;
+    /** Given a symbol for a module, checks that it is a shorthand ambient module. */
+    function isShorthandAmbientModuleSymbol(moduleSymbol: Symbol): boolean;
+    function isBlockScopedContainerTopLevel(node: Node): boolean;
+    function isGlobalScopeAugmentation(module: ModuleDeclaration): boolean;
+    function isExternalModuleAugmentation(node: Node): node is AmbientModuleDeclaration;
+    function isModuleAugmentationExternal(node: AmbientModuleDeclaration): boolean;
+    function isEffectiveExternalModule(node: SourceFile, compilerOptions: CompilerOptions): boolean;
+    function isBlockScope(node: Node, parentNode: Node): boolean;
+    function isDeclarationWithTypeParameters(node: Node): node is DeclarationWithTypeParameters;
+    function isAnyImportSyntax(node: Node): node is AnyImportSyntax;
+    function isLateVisibilityPaintedStatement(node: Node): node is LateVisibilityPaintedStatement;
+    function isAnyImportOrReExport(node: Node): node is AnyImportOrReExport;
+    function getEnclosingBlockScopeContainer(node: Node): Node;
+    function declarationNameToString(name: DeclarationName | QualifiedName): string;
+    function getNameFromIndexInfo(info: IndexInfo): string | undefined;
+    function getTextOfPropertyName(name: PropertyName): __String;
+    function entityNameToString(name: EntityNameOrEntityNameExpression): string;
+    function createDiagnosticForNode(node: Node, message: DiagnosticMessage, arg0?: string | number, arg1?: string | number, arg2?: string | number, arg3?: string | number): DiagnosticWithLocation;
+    function createDiagnosticForNodeArray(sourceFile: SourceFile, nodes: NodeArray<Node>, message: DiagnosticMessage, arg0?: string | number, arg1?: string | number, arg2?: string | number, arg3?: string | number): Diagnostic;
+    function createDiagnosticForNodeInSourceFile(sourceFile: SourceFile, node: Node, message: DiagnosticMessage, arg0?: string | number, arg1?: string | number, arg2?: string | number, arg3?: string | number): DiagnosticWithLocation;
+    function createDiagnosticForNodeFromMessageChain(node: Node, messageChain: DiagnosticMessageChain): DiagnosticWithLocation;
+    function getSpanOfTokenAtPosition(sourceFile: SourceFile, pos: number): TextSpan;
+    function getErrorSpanForNode(sourceFile: SourceFile, node: Node): TextSpan;
+    function isExternalOrCommonJsModule(file: SourceFile): boolean;
+    function isJsonSourceFile(file: SourceFile): file is JsonSourceFile;
+    function isConstEnumDeclaration(node: Node): boolean;
+    function isConst(node: Node): boolean;
+    function isLet(node: Node): boolean;
+    function isSuperCall(n: Node): n is SuperCall;
+    function isImportCall(n: Node): n is ImportCall;
+    function isLiteralImportTypeNode(n: Node): n is LiteralImportTypeNode;
+    function isPrologueDirective(node: Node): node is PrologueDirective;
+    function getLeadingCommentRangesOfNode(node: Node, sourceFileOfNode: SourceFile): CommentRange[] | undefined;
+    function getJSDocCommentRanges(node: Node, text: string): CommentRange[] | undefined;
+    const fullTripleSlashReferencePathRegEx: RegExp;
+    const fullTripleSlashAMDReferencePathRegEx: RegExp;
+    function isPartOfTypeNode(node: Node): boolean;
+    function isChildOfNodeWithKind(node: Node, kind: SyntaxKind): boolean;
+    function forEachReturnStatement<T>(body: Block, visitor: (stmt: ReturnStatement) => T): T | undefined;
+    function forEachYieldExpression(body: Block, visitor: (expr: YieldExpression) => void): void;
+    /**
+     * Gets the most likely element type for a TypeNode. This is not an exhaustive test
+     * as it assumes a rest argument can only be an array type (either T[], or Array<T>).
+     *
+     * @param node The type node.
+     */
+    function getRestParameterElementType(node: TypeNode | undefined): TypeNode | undefined;
+    function getMembersOfDeclaration(node: Declaration): NodeArray<ClassElement | TypeElement | ObjectLiteralElement> | undefined;
+    function isVariableLike(node: Node): node is VariableLikeDeclaration;
+    function isVariableLikeOrAccessor(node: Node): node is AccessorDeclaration | VariableLikeDeclaration;
+    function isVariableDeclarationInVariableStatement(node: VariableDeclaration): boolean;
+    function isValidESSymbolDeclaration(node: Node): node is VariableDeclaration | PropertyDeclaration | SignatureDeclaration;
+    function introducesArgumentsExoticObject(node: Node): boolean;
+    function unwrapInnermostStatementOfLabel(node: LabeledStatement, beforeUnwrapLabelCallback?: (node: LabeledStatement) => void): Statement;
+    function isFunctionBlock(node: Node): boolean;
+    function isObjectLiteralMethod(node: Node): node is MethodDeclaration;
+    function isObjectLiteralOrClassExpressionMethod(node: Node): node is MethodDeclaration;
+    function isIdentifierTypePredicate(predicate: TypePredicate): predicate is IdentifierTypePredicate;
+    function isThisTypePredicate(predicate: TypePredicate): predicate is ThisTypePredicate;
+    function getPropertyAssignment(objectLiteral: ObjectLiteralExpression, key: string, key2?: string): ReadonlyArray<PropertyAssignment>;
+    function getTsConfigObjectLiteralExpression(tsConfigSourceFile: TsConfigSourceFile | undefined): ObjectLiteralExpression | undefined;
+    function getTsConfigPropArrayElementValue(tsConfigSourceFile: TsConfigSourceFile | undefined, propKey: string, elementValue: string): StringLiteral | undefined;
+    function getTsConfigPropArray(tsConfigSourceFile: TsConfigSourceFile | undefined, propKey: string): ReadonlyArray<PropertyAssignment>;
+    function getContainingFunction(node: Node): SignatureDeclaration | undefined;
+    function getContainingClass(node: Node): ClassLikeDeclaration | undefined;
+    function getThisContainer(node: Node, includeArrowFunctions: boolean): Node;
+    function getNewTargetContainer(node: Node): Node | undefined;
+    /**
+     * Given an super call/property node, returns the closest node where
+     * - a super call/property access is legal in the node and not legal in the parent node the node.
+     *   i.e. super call is legal in constructor but not legal in the class body.
+     * - the container is an arrow function (so caller might need to call getSuperContainer again in case it needs to climb higher)
+     * - a super call/property is definitely illegal in the container (but might be legal in some subnode)
+     *   i.e. super property access is illegal in function declaration but can be legal in the statement list
+     */
+    function getSuperContainer(node: Node, stopOnFunctions: boolean): Node;
+    function getImmediatelyInvokedFunctionExpression(func: Node): CallExpression | undefined;
+    /**
+     * Determines whether a node is a property or element access expression for `super`.
+     */
+    function isSuperProperty(node: Node): node is SuperProperty;
+    /**
+     * Determines whether a node is a property or element access expression for `this`.
+     */
+    function isThisProperty(node: Node): boolean;
+    function getEntityNameFromTypeNode(node: TypeNode): EntityNameOrEntityNameExpression | undefined;
+    function getInvokedExpression(node: CallLikeExpression): Expression;
+    function nodeCanBeDecorated(node: ClassDeclaration): true;
+    function nodeCanBeDecorated(node: ClassElement, parent: Node): boolean;
+    function nodeCanBeDecorated(node: Node, parent: Node, grandparent: Node): boolean;
+    function nodeIsDecorated(node: ClassDeclaration): boolean;
+    function nodeIsDecorated(node: ClassElement, parent: Node): boolean;
+    function nodeIsDecorated(node: Node, parent: Node, grandparent: Node): boolean;
+    function nodeOrChildIsDecorated(node: ClassDeclaration): boolean;
+    function nodeOrChildIsDecorated(node: ClassElement, parent: Node): boolean;
+    function nodeOrChildIsDecorated(node: Node, parent: Node, grandparent: Node): boolean;
+    function childIsDecorated(node: ClassDeclaration): boolean;
+    function childIsDecorated(node: Node, parent: Node): boolean;
+    function isJSXTagName(node: Node): boolean;
+    function isExpressionNode(node: Node): boolean;
+    function isInExpressionContext(node: Node): boolean;
+    function isExternalModuleImportEqualsDeclaration(node: Node): boolean;
+    function getExternalModuleImportEqualsDeclarationExpression(node: Node): Expression;
+    function isInternalModuleImportEqualsDeclaration(node: Node): node is ImportEqualsDeclaration;
+    function isSourceFileJavaScript(file: SourceFile): boolean;
+    function isSourceFileNotJavaScript(file: SourceFile): boolean;
+    function isInJavaScriptFile(node: Node | undefined): boolean;
+    function isInJsonFile(node: Node | undefined): boolean;
+    function isInJSDoc(node: Node | undefined): boolean;
+    function isJSDocIndexSignature(node: TypeReferenceNode | ExpressionWithTypeArguments): boolean | undefined;
+    /**
+     * Returns true if the node is a CallExpression to the identifier 'require' with
+     * exactly one argument (of the form 'require("name")').
+     * This function does not test if the node is in a JavaScript file or not.
+     */
+    function isRequireCall(callExpression: Node, checkArgumentIsStringLiteralLike: true): callExpression is RequireOrImportCall & {
+        expression: Identifier;
+        arguments: [StringLiteralLike];
+    };
+    function isRequireCall(callExpression: Node, checkArgumentIsStringLiteralLike: boolean): callExpression is CallExpression;
+    function isSingleOrDoubleQuote(charCode: number): boolean;
+    function isStringDoubleQuoted(str: StringLiteralLike, sourceFile: SourceFile): boolean;
+    function getDeclarationOfJSInitializer(node: Node): Node | undefined;
+    /** Get the initializer, taking into account defaulted Javascript initializers */
+    function getEffectiveInitializer(node: HasExpressionInitializer): Expression | undefined;
+    /**
+     * Get the assignment 'initializer' -- the righthand side-- when the initializer is container-like (See getJavascriptInitializer).
+     * We treat the right hand side of assignments with container-like initalizers as declarations.
+     */
+    function getAssignedJavascriptInitializer(node: Node): Expression | undefined;
+    /**
+     * Recognized Javascript container-like initializers are:
+     * 1. (function() {})() -- IIFEs
+     * 2. function() { } -- Function expressions
+     * 3. class { } -- Class expressions
+     * 4. {} -- Empty object literals
+     * 5. { ... } -- Non-empty object literals, when used to initialize a prototype, like `C.prototype = { m() { } }`
+     *
+     * This function returns the provided initializer, or undefined if it is not valid.
+     */
+    function getJavascriptInitializer(initializer: Node, isPrototypeAssignment: boolean): Expression | undefined;
+    function isDefaultedJavascriptInitializer(node: BinaryExpression): boolean | undefined;
+    /** Given a Javascript initializer, return the outer name. That is, the lhs of the assignment or the declaration name. */
+    function getOuterNameOfJsInitializer(node: Declaration): DeclarationName | undefined;
+    function getRightMostAssignedExpression(node: Expression): Expression;
+    function isExportsIdentifier(node: Node): boolean;
+    function isModuleExportsPropertyAccessExpression(node: Node): boolean;
+    function getSpecialPropertyAssignmentKind(expr: BinaryExpression): SpecialPropertyAssignmentKind;
+    function getInitializerOfBinaryExpression(expr: BinaryExpression): Expression;
+    function isPrototypePropertyAssignment(node: Node): boolean;
+    function isSpecialPropertyDeclaration(expr: PropertyAccessExpression): boolean;
+    function importFromModuleSpecifier(node: StringLiteralLike): AnyValidImportOrReExport;
+    function tryGetImportFromModuleSpecifier(node: StringLiteralLike): AnyValidImportOrReExport | undefined;
+    function getExternalModuleName(node: AnyImportOrReExport | ImportTypeNode): Expression | undefined;
+    function getNamespaceDeclarationNode(node: ImportDeclaration | ImportEqualsDeclaration | ExportDeclaration): ImportEqualsDeclaration | NamespaceImport | undefined;
+    function isDefaultImport(node: ImportDeclaration | ImportEqualsDeclaration | ExportDeclaration): boolean;
+    function hasQuestionToken(node: Node): boolean;
+    function isJSDocConstructSignature(node: Node): boolean;
+    function isJSDocTypeAlias(node: Node): node is JSDocTypedefTag | JSDocCallbackTag;
+    function isTypeAlias(node: Node): node is JSDocTypedefTag | JSDocCallbackTag | TypeAliasDeclaration;
+    function getJSDocCommentsAndTags(hostNode: Node): ReadonlyArray<JSDoc | JSDocTag>;
+    /** Does the opposite of `getJSDocParameterTags`: given a JSDoc parameter, finds the parameter corresponding to it. */
+    function getParameterSymbolFromJSDoc(node: JSDocParameterTag): Symbol | undefined;
+    function getHostSignatureFromJSDoc(node: Node): SignatureDeclaration | undefined;
+    function getHostSignatureFromJSDocHost(host: HasJSDoc): SignatureDeclaration | undefined;
+    function getJSDocHost(node: Node): HasJSDoc;
+    function getTypeParameterFromJsDoc(node: TypeParameterDeclaration & {
+        parent: JSDocTemplateTag;
+    }): TypeParameterDeclaration | undefined;
+    function hasRestParameter(s: SignatureDeclaration | JSDocSignature): boolean;
+    function isRestParameter(node: ParameterDeclaration | JSDocParameterTag): boolean;
+    enum AssignmentKind {
+        None = 0,
+        Definite = 1,
+        Compound = 2
+    }
+    function getAssignmentTargetKind(node: Node): AssignmentKind;
+    function isAssignmentTarget(node: Node): boolean;
+    type NodeWithPossibleHoistedDeclaration = Block | VariableStatement | WithStatement | IfStatement | SwitchStatement | CaseBlock | CaseClause | DefaultClause | LabeledStatement | ForStatement | ForInStatement | ForOfStatement | DoStatement | WhileStatement | TryStatement | CatchClause;
+    /**
+     * Indicates whether a node could contain a `var` VariableDeclarationList that contributes to
+     * the same `var` declaration scope as the node's parent.
+     */
+    function isNodeWithPossibleHoistedDeclaration(node: Node): node is NodeWithPossibleHoistedDeclaration;
+    type ValueSignatureDeclaration = FunctionDeclaration | MethodDeclaration | ConstructorDeclaration | AccessorDeclaration | FunctionExpression | ArrowFunction;
+    function isValueSignatureDeclaration(node: Node): node is ValueSignatureDeclaration;
+    function walkUpParenthesizedTypes(node: Node): Node;
+    function walkUpParenthesizedExpressions(node: Node): Node;
+    function skipParentheses(node: Expression): Expression;
+    function skipParentheses(node: Node): Node;
+    function isDeleteTarget(node: Node): boolean;
+    function isNodeDescendantOf(node: Node, ancestor: Node): boolean;
+    function isDeclarationName(name: Node): boolean;
+    function isAnyDeclarationName(name: Node): boolean;
+    function isLiteralComputedPropertyDeclarationName(node: Node): boolean;
+    function isIdentifierName(node: Identifier): boolean;
+    function isAliasSymbolDeclaration(node: Node): boolean;
+    function exportAssignmentIsAlias(node: ExportAssignment | BinaryExpression): boolean;
+    function getClassExtendsHeritageClauseElement(node: ClassLikeDeclaration | InterfaceDeclaration): ExpressionWithTypeArguments | undefined;
+    function getClassImplementsHeritageClauseElements(node: ClassLikeDeclaration): NodeArray<ExpressionWithTypeArguments> | undefined;
+    /** Returns the node in an `extends` or `implements` clause of a class or interface. */
+    function getAllSuperTypeNodes(node: Node): ReadonlyArray<TypeNode>;
+    function getInterfaceBaseTypeNodes(node: InterfaceDeclaration): NodeArray<ExpressionWithTypeArguments> | undefined;
+    function getHeritageClause(clauses: NodeArray<HeritageClause> | undefined, kind: SyntaxKind): HeritageClause | undefined;
+    function tryResolveScriptReference(host: ScriptReferenceHost, sourceFile: SourceFile, reference: FileReference): SourceFile | undefined;
+    function getAncestor(node: Node | undefined, kind: SyntaxKind): Node | undefined;
+    function isKeyword(token: SyntaxKind): boolean;
+    function isContextualKeyword(token: SyntaxKind): boolean;
+    function isNonContextualKeyword(token: SyntaxKind): boolean;
+    function isStringANonContextualKeyword(name: string): boolean;
+    type TriviaKind = SyntaxKind.SingleLineCommentTrivia | SyntaxKind.MultiLineCommentTrivia | SyntaxKind.NewLineTrivia | SyntaxKind.WhitespaceTrivia | SyntaxKind.ShebangTrivia | SyntaxKind.ConflictMarkerTrivia;
+    function isTrivia(token: SyntaxKind): token is TriviaKind;
+    enum FunctionFlags {
+        Normal = 0,
+        Generator = 1,
+        Async = 2,
+        Invalid = 4,
+        AsyncGenerator = 3
+    }
+    function getFunctionFlags(node: SignatureDeclaration | undefined): FunctionFlags;
+    function isAsyncFunction(node: Node): boolean;
+    function isStringOrNumericLiteral(node: Node): node is StringLiteral | NumericLiteral;
+    /**
+     * A declaration has a dynamic name if both of the following are true:
+     *   1. The declaration has a computed property name
+     *   2. The computed name is *not* expressed as Symbol.<name>, where name
+     *      is a property of the Symbol constructor that denotes a built in
+     *      Symbol.
+     */
+    function hasDynamicName(declaration: Declaration): declaration is DynamicNamedDeclaration;
+    function isDynamicName(name: DeclarationName): boolean;
+    /**
+     * Checks if the expression is of the form:
+     *    Symbol.name
+     * where Symbol is literally the word "Symbol", and name is any identifierName
+     */
+    function isWellKnownSymbolSyntactically(node: Expression): boolean;
+    function getPropertyNameForPropertyNameNode(name: DeclarationName): __String | undefined;
+    type PropertyNameLiteral = Identifier | StringLiteralLike | NumericLiteral;
+    function isPropertyNameLiteral(node: Node): node is PropertyNameLiteral;
+    function getTextOfIdentifierOrLiteral(node: PropertyNameLiteral): string;
+    function getEscapedTextOfIdentifierOrLiteral(node: PropertyNameLiteral): __String;
+    function getPropertyNameForKnownSymbolName(symbolName: string): __String;
+    function isKnownSymbol(symbol: Symbol): boolean;
+    /**
+     * Includes the word "Symbol" with unicode escapes
+     */
+    function isESSymbolIdentifier(node: Node): boolean;
+    function isPushOrUnshiftIdentifier(node: Identifier): boolean;
+    function isParameterDeclaration(node: VariableLikeDeclaration): boolean;
+    function getRootDeclaration(node: Node): Node;
+    function nodeStartsNewLexicalEnvironment(node: Node): boolean;
+    function nodeIsSynthesized(range: TextRange): boolean;
+    function getOriginalSourceFile(sourceFile: SourceFile): SourceFile;
+    enum Associativity {
+        Left = 0,
+        Right = 1
+    }
+    function getExpressionAssociativity(expression: Expression): Associativity;
+    function getOperatorAssociativity(kind: SyntaxKind, operator: SyntaxKind, hasArguments?: boolean): Associativity;
+    function getExpressionPrecedence(expression: Expression): number;
+    function getOperator(expression: Expression): SyntaxKind.Unknown | SyntaxKind.EndOfFileToken | SyntaxKind.SingleLineCommentTrivia | SyntaxKind.MultiLineCommentTrivia | SyntaxKind.NewLineTrivia | SyntaxKind.WhitespaceTrivia | SyntaxKind.ShebangTrivia | SyntaxKind.ConflictMarkerTrivia | SyntaxKind.NumericLiteral | SyntaxKind.StringLiteral | SyntaxKind.JsxText | SyntaxKind.JsxTextAllWhiteSpaces | SyntaxKind.RegularExpressionLiteral | SyntaxKind.NoSubstitutionTemplateLiteral | SyntaxKind.TemplateHead | SyntaxKind.TemplateMiddle | SyntaxKind.TemplateTail | SyntaxKind.OpenBraceToken | SyntaxKind.CloseBraceToken | SyntaxKind.OpenParenToken | SyntaxKind.CloseParenToken | SyntaxKind.OpenBracketToken | SyntaxKind.CloseBracketToken | SyntaxKind.DotToken | SyntaxKind.DotDotDotToken | SyntaxKind.SemicolonToken | SyntaxKind.CommaToken | SyntaxKind.LessThanToken | SyntaxKind.LessThanSlashToken | SyntaxKind.GreaterThanToken | SyntaxKind.LessThanEqualsToken | SyntaxKind.GreaterThanEqualsToken | SyntaxKind.EqualsEqualsToken | SyntaxKind.ExclamationEqualsToken | SyntaxKind.EqualsEqualsEqualsToken | SyntaxKind.ExclamationEqualsEqualsToken | SyntaxKind.EqualsGreaterThanToken | SyntaxKind.PlusToken | SyntaxKind.MinusToken | SyntaxKind.AsteriskToken | SyntaxKind.AsteriskAsteriskToken | SyntaxKind.SlashToken | SyntaxKind.PercentToken | SyntaxKind.PlusPlusToken | SyntaxKind.MinusMinusToken | SyntaxKind.LessThanLessThanToken | SyntaxKind.GreaterThanGreaterThanToken | SyntaxKind.GreaterThanGreaterThanGreaterThanToken | SyntaxKind.AmpersandToken | SyntaxKind.BarToken | SyntaxKind.CaretToken | SyntaxKind.ExclamationToken | SyntaxKind.TildeToken | SyntaxKind.AmpersandAmpersandToken | SyntaxKind.BarBarToken | SyntaxKind.QuestionToken | SyntaxKind.ColonToken | SyntaxKind.AtToken | SyntaxKind.EqualsToken | SyntaxKind.PlusEqualsToken | SyntaxKind.MinusEqualsToken | SyntaxKind.AsteriskEqualsToken | SyntaxKind.AsteriskAsteriskEqualsToken | SyntaxKind.SlashEqualsToken | SyntaxKind.PercentEqualsToken | SyntaxKind.LessThanLessThanEqualsToken | SyntaxKind.GreaterThanGreaterThanEqualsToken | SyntaxKind.GreaterThanGreaterThanGreaterThanEqualsToken | SyntaxKind.AmpersandEqualsToken | SyntaxKind.BarEqualsToken | SyntaxKind.CaretEqualsToken | SyntaxKind.Identifier | SyntaxKind.BreakKeyword | SyntaxKind.CaseKeyword | SyntaxKind.CatchKeyword | SyntaxKind.ClassKeyword | SyntaxKind.ConstKeyword | SyntaxKind.ContinueKeyword | SyntaxKind.DebuggerKeyword | SyntaxKind.DefaultKeyword | SyntaxKind.DeleteKeyword | SyntaxKind.DoKeyword | SyntaxKind.ElseKeyword | SyntaxKind.EnumKeyword | SyntaxKind.ExportKeyword | SyntaxKind.ExtendsKeyword | SyntaxKind.FalseKeyword | SyntaxKind.FinallyKeyword | SyntaxKind.ForKeyword | SyntaxKind.FunctionKeyword | SyntaxKind.IfKeyword | SyntaxKind.ImportKeyword | SyntaxKind.InKeyword | SyntaxKind.InstanceOfKeyword | SyntaxKind.NewKeyword | SyntaxKind.NullKeyword | SyntaxKind.ReturnKeyword | SyntaxKind.SuperKeyword | SyntaxKind.SwitchKeyword | SyntaxKind.ThisKeyword | SyntaxKind.ThrowKeyword | SyntaxKind.TrueKeyword | SyntaxKind.TryKeyword | SyntaxKind.TypeOfKeyword | SyntaxKind.VarKeyword | SyntaxKind.VoidKeyword | SyntaxKind.WhileKeyword | SyntaxKind.WithKeyword | SyntaxKind.ImplementsKeyword | SyntaxKind.InterfaceKeyword | SyntaxKind.LetKeyword | SyntaxKind.PackageKeyword | SyntaxKind.PrivateKeyword | SyntaxKind.ProtectedKeyword | SyntaxKind.PublicKeyword | SyntaxKind.StaticKeyword | SyntaxKind.YieldKeyword | SyntaxKind.AbstractKeyword | SyntaxKind.AsKeyword | SyntaxKind.AnyKeyword | SyntaxKind.AsyncKeyword | SyntaxKind.AwaitKeyword | SyntaxKind.BooleanKeyword | SyntaxKind.ConstructorKeyword | SyntaxKind.DeclareKeyword | SyntaxKind.GetKeyword | SyntaxKind.InferKeyword | SyntaxKind.IsKeyword | SyntaxKind.KeyOfKeyword | SyntaxKind.ModuleKeyword | SyntaxKind.NamespaceKeyword | SyntaxKind.NeverKeyword | SyntaxKind.ReadonlyKeyword | SyntaxKind.RequireKeyword | SyntaxKind.NumberKeyword | SyntaxKind.ObjectKeyword | SyntaxKind.SetKeyword | SyntaxKind.StringKeyword | SyntaxKind.SymbolKeyword | SyntaxKind.TypeKeyword | SyntaxKind.UndefinedKeyword | SyntaxKind.UniqueKeyword | SyntaxKind.UnknownKeyword | SyntaxKind.FromKeyword | SyntaxKind.GlobalKeyword | SyntaxKind.OfKeyword | SyntaxKind.QualifiedName | SyntaxKind.ComputedPropertyName | SyntaxKind.TypeParameter | SyntaxKind.Parameter | SyntaxKind.Decorator | SyntaxKind.PropertySignature | SyntaxKind.PropertyDeclaration | SyntaxKind.MethodSignature | SyntaxKind.MethodDeclaration | SyntaxKind.Constructor | SyntaxKind.GetAccessor | SyntaxKind.SetAccessor | SyntaxKind.CallSignature | SyntaxKind.ConstructSignature | SyntaxKind.IndexSignature | SyntaxKind.TypePredicate | SyntaxKind.TypeReference | SyntaxKind.FunctionType | SyntaxKind.ConstructorType | SyntaxKind.TypeQuery | SyntaxKind.TypeLiteral | SyntaxKind.ArrayType | SyntaxKind.TupleType | SyntaxKind.UnionType | SyntaxKind.IntersectionType | SyntaxKind.ConditionalType | SyntaxKind.InferType | SyntaxKind.ParenthesizedType | SyntaxKind.ThisType | SyntaxKind.TypeOperator | SyntaxKind.IndexedAccessType | SyntaxKind.MappedType | SyntaxKind.LiteralType | SyntaxKind.ImportType | SyntaxKind.ObjectBindingPattern | SyntaxKind.ArrayBindingPattern | SyntaxKind.BindingElement | SyntaxKind.ArrayLiteralExpression | SyntaxKind.ObjectLiteralExpression | SyntaxKind.PropertyAccessExpression | SyntaxKind.ElementAccessExpression | SyntaxKind.CallExpression | SyntaxKind.NewExpression | SyntaxKind.TaggedTemplateExpression | SyntaxKind.TypeAssertionExpression | SyntaxKind.ParenthesizedExpression | SyntaxKind.FunctionExpression | SyntaxKind.ArrowFunction | SyntaxKind.DeleteExpression | SyntaxKind.TypeOfExpression | SyntaxKind.VoidExpression | SyntaxKind.AwaitExpression | SyntaxKind.ConditionalExpression | SyntaxKind.TemplateExpression | SyntaxKind.YieldExpression | SyntaxKind.SpreadElement | SyntaxKind.ClassExpression | SyntaxKind.OmittedExpression | SyntaxKind.ExpressionWithTypeArguments | SyntaxKind.AsExpression | SyntaxKind.NonNullExpression | SyntaxKind.MetaProperty | SyntaxKind.TemplateSpan | SyntaxKind.SemicolonClassElement | SyntaxKind.Block | SyntaxKind.VariableStatement | SyntaxKind.EmptyStatement | SyntaxKind.ExpressionStatement | SyntaxKind.IfStatement | SyntaxKind.DoStatement | SyntaxKind.WhileStatement | SyntaxKind.ForStatement | SyntaxKind.ForInStatement | SyntaxKind.ForOfStatement | SyntaxKind.ContinueStatement | SyntaxKind.BreakStatement | SyntaxKind.ReturnStatement | SyntaxKind.WithStatement | SyntaxKind.SwitchStatement | SyntaxKind.LabeledStatement | SyntaxKind.ThrowStatement | SyntaxKind.TryStatement | SyntaxKind.DebuggerStatement | SyntaxKind.VariableDeclaration | SyntaxKind.VariableDeclarationList | SyntaxKind.FunctionDeclaration | SyntaxKind.ClassDeclaration | SyntaxKind.InterfaceDeclaration | SyntaxKind.TypeAliasDeclaration | SyntaxKind.EnumDeclaration | SyntaxKind.ModuleDeclaration | SyntaxKind.ModuleBlock | SyntaxKind.CaseBlock | SyntaxKind.NamespaceExportDeclaration | SyntaxKind.ImportEqualsDeclaration | SyntaxKind.ImportDeclaration | SyntaxKind.ImportClause | SyntaxKind.NamespaceImport | SyntaxKind.NamedImports | SyntaxKind.ImportSpecifier | SyntaxKind.ExportAssignment | SyntaxKind.ExportDeclaration | SyntaxKind.NamedExports | SyntaxKind.ExportSpecifier | SyntaxKind.MissingDeclaration | SyntaxKind.ExternalModuleReference | SyntaxKind.JsxElement | SyntaxKind.JsxSelfClosingElement | SyntaxKind.JsxOpeningElement | SyntaxKind.JsxClosingElement | SyntaxKind.JsxFragment | SyntaxKind.JsxOpeningFragment | SyntaxKind.JsxClosingFragment | SyntaxKind.JsxAttribute | SyntaxKind.JsxAttributes | SyntaxKind.JsxSpreadAttribute | SyntaxKind.JsxExpression | SyntaxKind.CaseClause | SyntaxKind.DefaultClause | SyntaxKind.HeritageClause | SyntaxKind.CatchClause | SyntaxKind.PropertyAssignment | SyntaxKind.ShorthandPropertyAssignment | SyntaxKind.SpreadAssignment | SyntaxKind.EnumMember | SyntaxKind.SourceFile | SyntaxKind.Bundle | SyntaxKind.UnparsedSource | SyntaxKind.InputFiles | SyntaxKind.JSDocTypeExpression | SyntaxKind.JSDocAllType | SyntaxKind.JSDocUnknownType | SyntaxKind.JSDocNullableType | SyntaxKind.JSDocNonNullableType | SyntaxKind.JSDocOptionalType | SyntaxKind.JSDocFunctionType | SyntaxKind.JSDocVariadicType | SyntaxKind.JSDocComment | SyntaxKind.JSDocTypeLiteral | SyntaxKind.JSDocSignature | SyntaxKind.JSDocTag | SyntaxKind.JSDocAugmentsTag | SyntaxKind.JSDocClassTag | SyntaxKind.JSDocCallbackTag | SyntaxKind.JSDocParameterTag | SyntaxKind.JSDocReturnTag | SyntaxKind.JSDocTypeTag | SyntaxKind.JSDocTemplateTag | SyntaxKind.JSDocTypedefTag | SyntaxKind.JSDocPropertyTag | SyntaxKind.SyntaxList | SyntaxKind.NotEmittedStatement | SyntaxKind.PartiallyEmittedExpression | SyntaxKind.CommaListExpression | SyntaxKind.MergeDeclarationMarker | SyntaxKind.EndOfDeclarationMarker | SyntaxKind.Count;
+    function getOperatorPrecedence(nodeKind: SyntaxKind, operatorKind: SyntaxKind, hasArguments?: boolean): number;
+    function getBinaryOperatorPrecedence(kind: SyntaxKind): number;
+    function createDiagnosticCollection(): DiagnosticCollection;
+    /**
+     * Based heavily on the abstract 'Quote'/'QuoteJSONString' operation from ECMA-262 (24.3.2.2),
+     * but augmented for a few select characters (e.g. lineSeparator, paragraphSeparator, nextLine)
+     * Note that this doesn't actually wrap the input in double quotes.
+     */
+    function escapeString(s: string, quoteChar?: CharacterCodes.doubleQuote | CharacterCodes.singleQuote | CharacterCodes.backtick): string;
+    function isIntrinsicJsxName(name: __String | string): boolean;
+    function escapeNonAsciiString(s: string, quoteChar?: CharacterCodes.doubleQuote | CharacterCodes.singleQuote | CharacterCodes.backtick): string;
+    function getIndentString(level: number): string;
+    function getIndentSize(): number;
+    function createTextWriter(newLine: string): EmitTextWriter;
+    function getResolvedExternalModuleName(host: EmitHost, file: SourceFile, referenceFile?: SourceFile): string;
+    function getExternalModuleNameFromDeclaration(host: EmitHost, resolver: EmitResolver, declaration: ImportEqualsDeclaration | ImportDeclaration | ExportDeclaration | ModuleDeclaration | ImportTypeNode): string | undefined;
+    /**
+     * Resolves a local path to a path which is absolute to the base of the emit
+     */
+    function getExternalModuleNameFromPath(host: EmitHost, fileName: string, referencePath?: string): string;
+    function getOwnEmitOutputFilePath(sourceFile: SourceFile, host: EmitHost, extension: string): string;
+    function getDeclarationEmitOutputFilePath(sourceFile: SourceFile, host: EmitHost): string;
+    interface EmitFileNames {
+        jsFilePath: string;
+        sourceMapFilePath: string | undefined;
+        declarationFilePath: string | undefined;
+        declarationMapPath: string | undefined;
+        bundleInfoPath: string | undefined;
+    }
+    /**
+     * Gets the source files that are expected to have an emit output.
+     *
+     * Originally part of `forEachExpectedEmitFile`, this functionality was extracted to support
+     * transformations.
+     *
+     * @param host An EmitHost.
+     * @param targetSourceFile An optional target source file to emit.
+     */
+    function getSourceFilesToEmit(host: EmitHost, targetSourceFile?: SourceFile): ReadonlyArray<SourceFile>;
+    /** Don't call this for `--outFile`, just for `--outDir` or plain emit. `--outFile` needs additional checks. */
+    function sourceFileMayBeEmitted(sourceFile: SourceFile, options: CompilerOptions, isSourceFileFromExternalLibrary: (file: SourceFile) => boolean): boolean;
+    function getSourceFilePathInNewDir(sourceFile: SourceFile, host: EmitHost, newDirPath: string): string;
+    function writeFile(host: EmitHost, diagnostics: DiagnosticCollection, fileName: string, data: string, writeByteOrderMark: boolean, sourceFiles?: ReadonlyArray<SourceFile>): void;
+    function getLineOfLocalPosition(currentSourceFile: SourceFile, pos: number): number;
+    function getLineOfLocalPositionFromLineMap(lineMap: ReadonlyArray<number>, pos: number): number;
+    function getFirstConstructorWithBody(node: ClassLikeDeclaration): ConstructorDeclaration | undefined;
+    /** Get the type annotation for the value parameter. */
+    function getSetAccessorTypeAnnotationNode(accessor: SetAccessorDeclaration): TypeNode | undefined;
+    function getThisParameter(signature: SignatureDeclaration | JSDocSignature): ParameterDeclaration | undefined;
+    function parameterIsThisKeyword(parameter: ParameterDeclaration): boolean;
+    function isThisIdentifier(node: Node | undefined): boolean;
+    function identifierIsThisKeyword(id: Identifier): boolean;
+    function getAllAccessorDeclarations(declarations: NodeArray<Declaration>, accessor: AccessorDeclaration): AllAccessorDeclarations;
+    /**
+     * Gets the effective type annotation of a variable, parameter, or property. If the node was
+     * parsed in a JavaScript file, gets the type annotation from JSDoc.
+     */
+    function getEffectiveTypeAnnotationNode(node: Node): TypeNode | undefined;
+    function getTypeAnnotationNode(node: Node): TypeNode | undefined;
+    /**
+     * Gets the effective return type annotation of a signature. If the node was parsed in a
+     * JavaScript file, gets the return type annotation from JSDoc.
+     */
+    function getEffectiveReturnTypeNode(node: SignatureDeclaration | JSDocSignature): TypeNode | undefined;
+    /**
+     * Gets the effective type parameters. If the node was parsed in a
+     * JavaScript file, gets the type parameters from the `@template` tag from JSDoc.
+     */
+    function getEffectiveTypeParameterDeclarations(node: DeclarationWithTypeParameters): ReadonlyArray<TypeParameterDeclaration>;
+    function getJSDocTypeParameterDeclarations(node: DeclarationWithTypeParameters): ReadonlyArray<TypeParameterDeclaration>;
+    /**
+     * Gets the effective type annotation of the value parameter of a set accessor. If the node
+     * was parsed in a JavaScript file, gets the type annotation from JSDoc.
+     */
+    function getEffectiveSetAccessorTypeAnnotationNode(node: SetAccessorDeclaration): TypeNode | undefined;
+    function emitNewLineBeforeLeadingComments(lineMap: ReadonlyArray<number>, writer: EmitTextWriter, node: TextRange, leadingComments: ReadonlyArray<CommentRange> | undefined): void;
+    function emitNewLineBeforeLeadingCommentsOfPosition(lineMap: ReadonlyArray<number>, writer: EmitTextWriter, pos: number, leadingComments: ReadonlyArray<CommentRange> | undefined): void;
+    function emitNewLineBeforeLeadingCommentOfPosition(lineMap: ReadonlyArray<number>, writer: EmitTextWriter, pos: number, commentPos: number): void;
+    function emitComments(text: string, lineMap: ReadonlyArray<number>, writer: EmitTextWriter, comments: ReadonlyArray<CommentRange> | undefined, leadingSeparator: boolean, trailingSeparator: boolean, newLine: string, writeComment: (text: string, lineMap: ReadonlyArray<number>, writer: EmitTextWriter, commentPos: number, commentEnd: number, newLine: string) => void): void;
+    /**
+     * Detached comment is a comment at the top of file or function body that is separated from
+     * the next statement by space.
+     */
+    function emitDetachedComments(text: string, lineMap: ReadonlyArray<number>, writer: EmitTextWriter, writeComment: (text: string, lineMap: ReadonlyArray<number>, writer: EmitTextWriter, commentPos: number, commentEnd: number, newLine: string) => void, node: TextRange, newLine: string, removeComments: boolean): {
+        nodePos: number;
+        detachedCommentEndPos: number;
+    } | undefined;
+    function writeCommentRange(text: string, lineMap: ReadonlyArray<number>, writer: EmitTextWriter, commentPos: number, commentEnd: number, newLine: string): void;
+    function hasModifiers(node: Node): boolean;
+    function hasModifier(node: Node, flags: ModifierFlags): boolean;
+    function hasStaticModifier(node: Node): boolean;
+    function hasReadonlyModifier(node: Node): boolean;
+    function getSelectedModifierFlags(node: Node, flags: ModifierFlags): ModifierFlags;
+    function getModifierFlags(node: Node): ModifierFlags;
+    function getModifierFlagsNoCache(node: Node): ModifierFlags;
+    function modifierToFlag(token: SyntaxKind): ModifierFlags;
+    function isLogicalOperator(token: SyntaxKind): boolean;
+    function isAssignmentOperator(token: SyntaxKind): boolean;
+    /** Get `C` given `N` if `N` is in the position `class C extends N` where `N` is an ExpressionWithTypeArguments. */
+    function tryGetClassExtendingExpressionWithTypeArguments(node: Node): ClassLikeDeclaration | undefined;
+    function isAssignmentExpression(node: Node, excludeCompoundAssignment: true): node is AssignmentExpression<EqualsToken>;
+    function isAssignmentExpression(node: Node, excludeCompoundAssignment?: false): node is AssignmentExpression<AssignmentOperatorToken>;
+    function isDestructuringAssignment(node: Node): node is DestructuringAssignment;
+    function isExpressionWithTypeArgumentsInClassExtendsClause(node: Node): boolean;
+    function isExpressionWithTypeArgumentsInClassImplementsClause(node: Node): node is ExpressionWithTypeArguments;
+    function isEntityNameExpression(node: Node): node is EntityNameExpression;
+    function isPropertyAccessEntityNameExpression(node: Node): node is PropertyAccessEntityNameExpression;
+    function isPrototypeAccess(node: Node): node is PropertyAccessExpression;
+    function isRightSideOfQualifiedNameOrPropertyAccess(node: Node): boolean;
+    function isEmptyObjectLiteral(expression: Node): boolean;
+    function isEmptyArrayLiteral(expression: Node): boolean;
+    function getLocalSymbolForExportDefault(symbol: Symbol): Symbol | undefined;
+    /** Return ".ts", ".d.ts", or ".tsx", if that is the extension. */
+    function tryExtractTypeScriptExtension(fileName: string): string | undefined;
+    /**
+     * Converts a string to a base-64 encoded ASCII string.
+     */
+    function convertToBase64(input: string): string;
+    function base64encode(host: {
+        base64encode?(input: string): string;
+    } | undefined, input: string): string;
+    function base64decode(host: {
+        base64decode?(input: string): string;
+    } | undefined, input: string): string;
+    function getNewLineCharacter(options: CompilerOptions | PrinterOptions, getNewLine?: () => string): string;
+    function formatSyntaxKind(kind: SyntaxKind | undefined): string;
+    function formatModifierFlags(flags: ModifierFlags | undefined): string;
+    function formatTransformFlags(flags: TransformFlags | undefined): string;
+    function formatEmitFlags(flags: EmitFlags | undefined): string;
+    function formatSymbolFlags(flags: SymbolFlags | undefined): string;
+    function formatTypeFlags(flags: TypeFlags | undefined): string;
+    function formatObjectFlags(flags: ObjectFlags | undefined): string;
+    /**
+     * Creates a new TextRange from the provided pos and end.
+     *
+     * @param pos The start position.
+     * @param end The end position.
+     */
+    function createRange(pos: number, end: number): TextRange;
+    /**
+     * Creates a new TextRange from a provided range with a new end position.
+     *
+     * @param range A TextRange.
+     * @param end The new end position.
+     */
+    function moveRangeEnd(range: TextRange, end: number): TextRange;
+    /**
+     * Creates a new TextRange from a provided range with a new start position.
+     *
+     * @param range A TextRange.
+     * @param pos The new Start position.
+     */
+    function moveRangePos(range: TextRange, pos: number): TextRange;
+    /**
+     * Moves the start position of a range past any decorators.
+     */
+    function moveRangePastDecorators(node: Node): TextRange;
+    /**
+     * Moves the start position of a range past any decorators or modifiers.
+     */
+    function moveRangePastModifiers(node: Node): TextRange;
+    /**
+     * Determines whether a TextRange has the same start and end positions.
+     *
+     * @param range A TextRange.
+     */
+    function isCollapsedRange(range: TextRange): boolean;
+    /**
+     * Creates a new TextRange for a token at the provides start position.
+     *
+     * @param pos The start position.
+     * @param token The token.
+     */
+    function createTokenRange(pos: number, token: SyntaxKind): TextRange;
+    function rangeIsOnSingleLine(range: TextRange, sourceFile: SourceFile): boolean;
+    function rangeStartPositionsAreOnSameLine(range1: TextRange, range2: TextRange, sourceFile: SourceFile): boolean;
+    function rangeEndPositionsAreOnSameLine(range1: TextRange, range2: TextRange, sourceFile: SourceFile): boolean;
+    function rangeStartIsOnSameLineAsRangeEnd(range1: TextRange, range2: TextRange, sourceFile: SourceFile): boolean;
+    function rangeEndIsOnSameLineAsRangeStart(range1: TextRange, range2: TextRange, sourceFile: SourceFile): boolean;
+    function positionsAreOnSameLine(pos1: number, pos2: number, sourceFile: SourceFile): boolean;
+    function getStartPositionOfRange(range: TextRange, sourceFile: SourceFile): number;
+    /**
+     * Determines whether a name was originally the declaration name of an enum or namespace
+     * declaration.
+     */
+    function isDeclarationNameOfEnumOrNamespace(node: Identifier): boolean;
+    function getInitializedVariables(node: VariableDeclarationList): ReadonlyArray<VariableDeclaration>;
+    function isWatchSet(options: CompilerOptions): boolean | undefined;
+    function closeFileWatcher(watcher: FileWatcher): void;
+    function getCheckFlags(symbol: Symbol): CheckFlags;
+    function getDeclarationModifierFlagsFromSymbol(s: Symbol): ModifierFlags;
+    function skipAlias(symbol: Symbol, checker: TypeChecker): Symbol;
+    /** See comment on `declareModuleMember` in `binder.ts`. */
+    function getCombinedLocalAndExportSymbolFlags(symbol: Symbol): SymbolFlags;
+    function isWriteOnlyAccess(node: Node): boolean;
+    function isWriteAccess(node: Node): boolean;
+    function compareDataObjects(dst: any, src: any): boolean;
+    /**
+     * clears already present map by calling onDeleteExistingValue callback before deleting that key/value
+     */
+    function clearMap<T>(map: Map<T>, onDeleteValue: (valueInMap: T, key: string) => void): void;
+    interface MutateMapOptions<T, U> {
+        createNewValue(key: string, valueInNewMap: U): T;
+        onDeleteValue(existingValue: T, key: string): void;
+        /**
+         * If present this is called with the key when there is value for that key both in new map as well as existing map provided
+         * Caller can then decide to update or remove this key.
+         * If the key is removed, caller will get callback of createNewValue for that key.
+         * If this callback is not provided, the value of such keys is not updated.
+         */
+        onExistingValue?(existingValue: T, valueInNewMap: U, key: string): void;
+    }
+    /**
+     * Mutates the map with newMap such that keys in map will be same as newMap.
+     */
+    function mutateMap<T, U>(map: Map<T>, newMap: ReadonlyMap<U>, options: MutateMapOptions<T, U>): void;
+    /** Calls `callback` on `directory` and every ancestor directory it has, returning the first defined result. */
+    function forEachAncestorDirectory<T>(directory: string, callback: (directory: string) => T | undefined): T | undefined;
+    function isAbstractConstructorType(type: Type): boolean;
+    function isAbstractConstructorSymbol(symbol: Symbol): boolean;
+    function getClassLikeDeclarationOfSymbol(symbol: Symbol): ClassLikeDeclaration | undefined;
+    function getObjectFlags(type: Type): ObjectFlags;
+    function typeHasCallOrConstructSignatures(type: Type, checker: TypeChecker): boolean;
+    function forSomeAncestorDirectory(directory: string, callback: (directory: string) => boolean): boolean;
+    function isUMDExportSymbol(symbol: Symbol | undefined): boolean | undefined;
+    function showModuleSpecifier({ moduleSpecifier }: ImportDeclaration): string;
+    function getLastChild(node: Node): Node | undefined;
+    /** Add a value to a set, and return true if it wasn't already present. */
+    function addToSeen(seen: Map<true>, key: string | number): boolean;
+    function addToSeen<T>(seen: Map<T>, key: string | number, value: T): boolean;
+    function isObjectTypeDeclaration(node: Node): node is ObjectTypeDeclaration;
+}
 declare namespace ts {
     function getDefaultLibFileName(options: CompilerOptions): string;
     function textSpanEnd(span: TextSpan): number;
@@ -3113,6 +6605,7 @@ declare namespace ts {
     function textSpanIntersectsWithPosition(span: TextSpan, position: number): boolean;
     function textSpanIntersection(span1: TextSpan, span2: TextSpan): TextSpan | undefined;
     function createTextSpan(start: number, length: number): TextSpan;
+    function createTextRange(pos: number, end?: number): TextRange;
     function createTextSpanFromBounds(start: number, end: number): TextSpan;
     function textChangeRangeNewSpan(range: TextChangeRange): TextSpan;
     function textChangeRangeIsUnchanged(range: TextChangeRange): boolean;
@@ -3189,6 +6682,10 @@ declare namespace ts {
      */
     function unescapeIdentifier(id: string): string;
     function getNameOfJSDocTypedef(declaration: JSDocTypedefTag): Identifier | undefined;
+    /** @internal */
+    function isNamedDeclaration(node: Node): node is NamedDeclaration & {
+        name: DeclarationName;
+    };
     function getNameOfDeclaration(declaration: Declaration | Expression): DeclarationName;
     /**
      * Gets the JSDoc parameter tags for the node if present.
@@ -3270,6 +6767,7 @@ declare namespace ts {
     function isCallSignatureDeclaration(node: Node): node is CallSignatureDeclaration;
     function isConstructSignatureDeclaration(node: Node): node is ConstructSignatureDeclaration;
     function isIndexSignatureDeclaration(node: Node): node is IndexSignatureDeclaration;
+    function isGetOrSetAccessorDeclaration(node: Node): node is AccessorDeclaration;
     function isTypePredicateNode(node: Node): node is TypePredicateNode;
     function isTypeReferenceNode(node: Node): node is TypeReferenceNode;
     function isFunctionTypeNode(node: Node): node is FunctionTypeNode;
@@ -3412,25 +6910,39 @@ declare namespace ts {
     function isJSDocSignature(node: Node): node is JSDocSignature;
 }
 declare namespace ts {
+    function isSyntaxList(n: Node): n is SyntaxList;
+    function isNode(node: Node): boolean;
+    function isNodeKind(kind: SyntaxKind): boolean;
     /**
      * True if node is of some token syntax kind.
      * For example, this is true for an IfKeyword but not for an IfStatement.
      * Literals are considered tokens, except TemplateLiteral, but does include TemplateHead/Middle/Tail.
      */
     function isToken(n: Node): boolean;
+    function isNodeArray<T extends Node>(array: ReadonlyArray<T>): array is NodeArray<T>;
+    function isLiteralKind(kind: SyntaxKind): boolean;
     function isLiteralExpression(node: Node): node is LiteralExpression;
+    function isTemplateLiteralKind(kind: SyntaxKind): boolean;
     type TemplateLiteralToken = NoSubstitutionTemplateLiteral | TemplateHead | TemplateMiddle | TemplateTail;
     function isTemplateLiteralToken(node: Node): node is TemplateLiteralToken;
     function isTemplateMiddleOrTemplateTail(node: Node): node is TemplateMiddle | TemplateTail;
     function isStringTextContainingNode(node: Node): node is StringLiteral | TemplateLiteralToken;
+    function isGeneratedIdentifier(node: Node): node is GeneratedIdentifier;
+    function isModifierKind(token: SyntaxKind): boolean;
+    function isParameterPropertyModifier(kind: SyntaxKind): boolean;
+    function isClassMemberModifier(idToken: SyntaxKind): boolean;
     function isModifier(node: Node): node is Modifier;
     function isEntityName(node: Node): node is EntityName;
     function isPropertyName(node: Node): node is PropertyName;
     function isBindingName(node: Node): node is BindingName;
     function isFunctionLike(node: Node): node is SignatureDeclaration;
+    function isFunctionLikeDeclaration(node: Node): node is FunctionLikeDeclaration;
+    function isFunctionLikeKind(kind: SyntaxKind): boolean;
+    function isFunctionOrModuleBlock(node: Node): boolean;
     function isClassElement(node: Node): node is ClassElement;
     function isClassLike(node: Node): node is ClassLikeDeclaration;
     function isAccessor(node: Node): node is AccessorDeclaration;
+    function isMethodOrAccessor(node: Node): node is MethodDeclaration | AccessorDeclaration;
     function isTypeElement(node: Node): node is TypeElement;
     function isClassOrTypeElement(node: Node): node is ClassElement | TypeElement;
     function isObjectLiteralElementLike(node: Node): node is ObjectLiteralElementLike;
@@ -3441,24 +6953,405 @@ declare namespace ts {
      */
     function isTypeNode(node: Node): node is TypeNode;
     function isFunctionOrConstructorTypeNode(node: Node): node is FunctionTypeNode | ConstructorTypeNode;
+    function isBindingPattern(node: Node | undefined): node is BindingPattern;
+    function isAssignmentPattern(node: Node): node is AssignmentPattern;
+    function isArrayBindingElement(node: Node): node is ArrayBindingElement;
+    /**
+     * Determines whether the BindingOrAssignmentElement is a BindingElement-like declaration
+     */
+    function isDeclarationBindingElement(bindingElement: BindingOrAssignmentElement): bindingElement is VariableDeclaration | ParameterDeclaration | BindingElement;
+    /**
+     * Determines whether a node is a BindingOrAssignmentPattern
+     */
+    function isBindingOrAssignmentPattern(node: BindingOrAssignmentElementTarget): node is BindingOrAssignmentPattern;
+    /**
+     * Determines whether a node is an ObjectBindingOrAssignmentPattern
+     */
+    function isObjectBindingOrAssignmentPattern(node: BindingOrAssignmentElementTarget): node is ObjectBindingOrAssignmentPattern;
+    /**
+     * Determines whether a node is an ArrayBindingOrAssignmentPattern
+     */
+    function isArrayBindingOrAssignmentPattern(node: BindingOrAssignmentElementTarget): node is ArrayBindingOrAssignmentPattern;
+    function isPropertyAccessOrQualifiedNameOrImportTypeNode(node: Node): node is PropertyAccessExpression | QualifiedName | ImportTypeNode;
     function isPropertyAccessOrQualifiedName(node: Node): node is PropertyAccessExpression | QualifiedName;
     function isCallLikeExpression(node: Node): node is CallLikeExpression;
     function isCallOrNewExpression(node: Node): node is CallExpression | NewExpression;
     function isTemplateLiteral(node: Node): node is TemplateLiteral;
+    function isLeftHandSideExpression(node: Node): node is LeftHandSideExpression;
+    function isUnaryExpression(node: Node): node is UnaryExpression;
+    function isUnaryExpressionWithWrite(expr: Node): expr is PrefixUnaryExpression | PostfixUnaryExpression;
+    /**
+     * Determines whether a node is an expression based only on its kind.
+     * Use `isExpressionNode` if not in transforms.
+     */
+    function isExpression(node: Node): node is Expression;
     function isAssertionExpression(node: Node): node is AssertionExpression;
+    function isPartiallyEmittedExpression(node: Node): node is PartiallyEmittedExpression;
+    function isNotEmittedStatement(node: Node): node is NotEmittedStatement;
+    function isNotEmittedOrPartiallyEmittedNode(node: Node): node is NotEmittedStatement | PartiallyEmittedExpression;
     function isIterationStatement(node: Node, lookInLabeledStatements: false): node is IterationStatement;
     function isIterationStatement(node: Node, lookInLabeledStatements: boolean): node is IterationStatement | LabeledStatement;
+    function isForInOrOfStatement(node: Node): node is ForInOrOfStatement;
+    function isConciseBody(node: Node): node is ConciseBody;
+    function isFunctionBody(node: Node): node is FunctionBody;
+    function isForInitializer(node: Node): node is ForInitializer;
+    function isModuleBody(node: Node): node is ModuleBody;
+    function isNamespaceBody(node: Node): node is NamespaceBody;
+    function isJSDocNamespaceBody(node: Node): node is JSDocNamespaceBody;
+    function isNamedImportBindings(node: Node): node is NamedImportBindings;
+    function isModuleOrEnumDeclaration(node: Node): node is ModuleDeclaration | EnumDeclaration;
+    function isDeclaration(node: Node): node is NamedDeclaration;
+    function isDeclarationStatement(node: Node): node is DeclarationStatement;
+    /**
+     * Determines whether the node is a statement that is not also a declaration
+     */
+    function isStatementButNotDeclaration(node: Node): node is Statement;
+    function isStatement(node: Node): node is Statement;
+    function isModuleReference(node: Node): node is ModuleReference;
+    function isJsxTagNameExpression(node: Node): node is JsxTagNameExpression;
+    function isJsxChild(node: Node): node is JsxChild;
+    function isJsxAttributeLike(node: Node): node is JsxAttributeLike;
+    function isStringLiteralOrJsxExpression(node: Node): node is StringLiteral | JsxExpression;
     function isJsxOpeningLikeElement(node: Node): node is JsxOpeningLikeElement;
     function isCaseOrDefaultClause(node: Node): node is CaseOrDefaultClause;
+    /** True if node is of some JSDoc syntax kind. */
+    function isJSDocNode(node: Node): boolean;
     /** True if node is of a kind that may contain comment text. */
     function isJSDocCommentContainingNode(node: Node): boolean;
+    function isJSDocTag(node: Node): boolean;
     function isSetAccessor(node: Node): node is SetAccessorDeclaration;
     function isGetAccessor(node: Node): node is GetAccessorDeclaration;
+    /** True if has jsdoc nodes attached to it. */
+    function hasJSDocNodes(node: Node): node is HasJSDoc;
+    /** True if has type node attached to it. */
+    function hasType(node: Node): node is HasType;
+    function couldHaveType(node: Node): node is HasType;
+    /** True if has initializer node attached to it. */
+    function hasInitializer(node: Node): node is HasInitializer;
+    /** True if has initializer node attached to it. */
+    function hasOnlyExpressionInitializer(node: Node): node is HasExpressionInitializer;
     function isObjectLiteralElement(node: Node): node is ObjectLiteralElement;
+    function isTypeReferenceType(node: Node): node is TypeReferenceType;
+    function guessIndentation(lines: string[]): number | undefined;
     function isStringLiteralLike(node: Node): node is StringLiteralLike;
 }
+declare namespace ts {
+    /** @internal */
+    function isNamedImportsOrExports(node: Node): node is NamedImportsOrExports;
+    interface ObjectAllocator {
+        getNodeConstructor(): new (kind: SyntaxKind, pos?: number, end?: number) => Node;
+        getTokenConstructor(): new <TKind extends SyntaxKind>(kind: TKind, pos?: number, end?: number) => Token<TKind>;
+        getIdentifierConstructor(): new (kind: SyntaxKind.Identifier, pos?: number, end?: number) => Identifier;
+        getSourceFileConstructor(): new (kind: SyntaxKind.SourceFile, pos?: number, end?: number) => SourceFile;
+        getSymbolConstructor(): new (flags: SymbolFlags, name: __String) => Symbol;
+        getTypeConstructor(): new (checker: TypeChecker, flags: TypeFlags) => Type;
+        getSignatureConstructor(): new (checker: TypeChecker) => Signature;
+        getSourceMapSourceConstructor(): new (fileName: string, text: string, skipTrivia?: (pos: number) => number) => SourceMapSource;
+    }
+    let objectAllocator: ObjectAllocator;
+    function formatStringFromArgs(text: string, args: ArrayLike<string>, baseIndex?: number): string;
+    let localizedDiagnosticMessages: MapLike<string> | undefined;
+    function getLocaleSpecificMessage(message: DiagnosticMessage): string;
+    function createFileDiagnostic(file: SourceFile, start: number, length: number, message: DiagnosticMessage, ...args: (string | number | undefined)[]): DiagnosticWithLocation;
+    function formatMessage(_dummy: any, message: DiagnosticMessage): string;
+    function createCompilerDiagnostic(message: DiagnosticMessage, ...args: (string | number | undefined)[]): Diagnostic;
+    function createCompilerDiagnosticFromMessageChain(chain: DiagnosticMessageChain): Diagnostic;
+    function chainDiagnosticMessages(details: DiagnosticMessageChain | undefined, message: DiagnosticMessage, ...args: (string | undefined)[]): DiagnosticMessageChain;
+    function concatenateDiagnosticMessageChains(headChain: DiagnosticMessageChain, tailChain: DiagnosticMessageChain): DiagnosticMessageChain;
+    function compareDiagnostics(d1: Diagnostic, d2: Diagnostic): Comparison;
+    function getEmitScriptTarget(compilerOptions: CompilerOptions): ScriptTarget;
+    function getEmitModuleKind(compilerOptions: {
+        module?: CompilerOptions["module"];
+        target?: CompilerOptions["target"];
+    }): ModuleKind;
+    function getEmitModuleResolutionKind(compilerOptions: CompilerOptions): ModuleResolutionKind;
+    function unreachableCodeIsError(options: CompilerOptions): boolean;
+    function unusedLabelIsError(options: CompilerOptions): boolean;
+    function getAreDeclarationMapsEnabled(options: CompilerOptions): boolean;
+    function getAllowSyntheticDefaultImports(compilerOptions: CompilerOptions): boolean;
+    function getEmitDeclarations(compilerOptions: CompilerOptions): boolean;
+    type StrictOptionName = "noImplicitAny" | "noImplicitThis" | "strictNullChecks" | "strictFunctionTypes" | "strictPropertyInitialization" | "alwaysStrict";
+    function getStrictOptionValue(compilerOptions: CompilerOptions, flag: StrictOptionName): boolean;
+    function hasZeroOrOneAsteriskCharacter(str: string): boolean;
+    /**
+     * Internally, we represent paths as strings with '/' as the directory separator.
+     * When we make system calls (eg: LanguageServiceHost.getDirectory()),
+     * we expect the host to correctly handle paths in our specified format.
+     */
+    const directorySeparator = "/";
+    /**
+     * Normalize path separators.
+     */
+    function normalizeSlashes(path: string): string;
+    /**
+     * Returns length of the root part of a path or URL (i.e. length of "/", "x:/", "//server/share/, file:///user/files").
+     *
+     * For example:
+     * ```ts
+     * getRootLength("a") === 0                   // ""
+     * getRootLength("/") === 1                   // "/"
+     * getRootLength("c:") === 2                  // "c:"
+     * getRootLength("c:d") === 0                 // ""
+     * getRootLength("c:/") === 3                 // "c:/"
+     * getRootLength("c:\\") === 3                // "c:\\"
+     * getRootLength("//server") === 7            // "//server"
+     * getRootLength("//server/share") === 8      // "//server/"
+     * getRootLength("\\\\server") === 7          // "\\\\server"
+     * getRootLength("\\\\server\\share") === 8   // "\\\\server\\"
+     * getRootLength("file:///path") === 8        // "file:///"
+     * getRootLength("file:///c:") === 10         // "file:///c:"
+     * getRootLength("file:///c:d") === 8         // "file:///"
+     * getRootLength("file:///c:/path") === 11    // "file:///c:/"
+     * getRootLength("file://server") === 13      // "file://server"
+     * getRootLength("file://server/path") === 14 // "file://server/"
+     * getRootLength("http://server") === 13      // "http://server"
+     * getRootLength("http://server/path") === 14 // "http://server/"
+     * ```
+     */
+    function getRootLength(path: string): number;
+    function normalizePath(path: string): string;
+    function normalizePathAndParts(path: string): {
+        path: string;
+        parts: string[];
+    };
+    /**
+     * Returns the path except for its basename. Semantics align with NodeJS's `path.dirname`
+     * except that we support URL's as well.
+     *
+     * ```ts
+     * getDirectoryPath("/path/to/file.ext") === "/path/to"
+     * getDirectoryPath("/path/to/") === "/path"
+     * getDirectoryPath("/") === "/"
+     * ```
+     */
+    function getDirectoryPath(path: Path): Path;
+    /**
+     * Returns the path except for its basename. Semantics align with NodeJS's `path.dirname`
+     * except that we support URL's as well.
+     *
+     * ```ts
+     * getDirectoryPath("/path/to/file.ext") === "/path/to"
+     * getDirectoryPath("/path/to/") === "/path"
+     * getDirectoryPath("/") === "/"
+     * ```
+     */
+    function getDirectoryPath(path: string): string;
+    function isUrl(path: string): boolean;
+    function pathIsRelative(path: string): boolean;
+    /**
+     * Determines whether a path is an absolute path (e.g. starts with `/`, or a dos path
+     * like `c:`, `c:\` or `c:/`).
+     */
+    function isRootedDiskPath(path: string): boolean;
+    /**
+     * Determines whether a path consists only of a path root.
+     */
+    function isDiskPathRoot(path: string): boolean;
+    function convertToRelativePath(absoluteOrRelativePath: string, basePath: string, getCanonicalFileName: (path: string) => string): string;
+    /**
+     * Parse a path into an array containing a root component (at index 0) and zero or more path
+     * components (at indices > 0). The result is not normalized.
+     * If the path is relative, the root component is `""`.
+     * If the path is absolute, the root component includes the first path separator (`/`).
+     */
+    function getPathComponents(path: string, currentDirectory?: string): string[];
+    /**
+     * Reduce an array of path components to a more simplified path by navigating any
+     * `"."` or `".."` entries in the path.
+     */
+    function reducePathComponents(components: ReadonlyArray<string>): string[];
+    /**
+     * Parse a path into an array containing a root component (at index 0) and zero or more path
+     * components (at indices > 0). The result is normalized.
+     * If the path is relative, the root component is `""`.
+     * If the path is absolute, the root component includes the first path separator (`/`).
+     */
+    function getNormalizedPathComponents(path: string, currentDirectory: string | undefined): string[];
+    function getNormalizedAbsolutePath(fileName: string, currentDirectory: string | undefined): string;
+    /**
+     * Formats a parsed path consisting of a root component (at index 0) and zero or more path
+     * segments (at indices > 0).
+     */
+    function getPathFromPathComponents(pathComponents: ReadonlyArray<string>): string;
+}
+declare namespace ts {
+    function getPathComponentsRelativeTo(from: string, to: string, stringEqualityComparer: (a: string, b: string) => boolean, getCanonicalFileName: GetCanonicalFileName): string[];
+    function getRelativePathFromFile(from: string, to: string, getCanonicalFileName: GetCanonicalFileName): string;
+    /**
+     * Gets a relative path that can be used to traverse between `from` and `to`.
+     */
+    function getRelativePathFromDirectory(from: string, to: string, ignoreCase: boolean): string;
+    /**
+     * Gets a relative path that can be used to traverse between `from` and `to`.
+     */
+    function getRelativePathFromDirectory(fromDirectory: string, to: string, getCanonicalFileName: GetCanonicalFileName): string;
+    function getRelativePathToDirectoryOrUrl(directoryPathOrUrl: string, relativeOrAbsolutePath: string, currentDirectory: string, getCanonicalFileName: GetCanonicalFileName, isAbsolutePathAnUrl: boolean): string;
+    /**
+     * Ensures a path is either absolute (prefixed with `/` or `c:`) or dot-relative (prefixed
+     * with `./` or `../`) so as not to be confused with an unprefixed module name.
+     */
+    function ensurePathIsNonModuleName(path: string): string;
+    /**
+     * Returns the path except for its containing directory name.
+     * Semantics align with NodeJS's `path.basename` except that we support URL's as well.
+     *
+     * ```ts
+     * getBaseFileName("/path/to/file.ext") === "file.ext"
+     * getBaseFileName("/path/to/") === "to"
+     * getBaseFileName("/") === ""
+     * ```
+     */
+    function getBaseFileName(path: string): string;
+    /**
+     * Gets the portion of a path following the last (non-terminal) separator (`/`).
+     * Semantics align with NodeJS's `path.basename` except that we support URL's as well.
+     * If the base name has any one of the provided extensions, it is removed.
+     *
+     * ```ts
+     * getBaseFileName("/path/to/file.ext", ".ext", true) === "file"
+     * getBaseFileName("/path/to/file.js", ".ext", true) === "file.js"
+     * ```
+     */
+    function getBaseFileName(path: string, extensions: string | ReadonlyArray<string>, ignoreCase: boolean): string;
+    /**
+     * Combines paths. If a path is absolute, it replaces any previous path.
+     */
+    function combinePaths(path: string, ...paths: (string | undefined)[]): string;
+    /**
+     * Combines and resolves paths. If a path is absolute, it replaces any previous path. Any
+     * `.` and `..` path components are resolved.
+     */
+    function resolvePath(path: string, ...paths: (string | undefined)[]): string;
+    /**
+     * Determines whether a path has a trailing separator (`/` or `\\`).
+     */
+    function hasTrailingDirectorySeparator(path: string): boolean;
+    /**
+     * Removes a trailing directory separator from a path.
+     * @param path The path.
+     */
+    function removeTrailingDirectorySeparator(path: Path): Path;
+    function removeTrailingDirectorySeparator(path: string): string;
+    /**
+     * Adds a trailing directory separator to a path, if it does not already have one.
+     * @param path The path.
+     */
+    function ensureTrailingDirectorySeparator(path: Path): Path;
+    function ensureTrailingDirectorySeparator(path: string): string;
+    /**
+     * Performs a case-sensitive comparison of two paths.
+     */
+    function comparePathsCaseSensitive(a: string, b: string): Comparison;
+    /**
+     * Performs a case-insensitive comparison of two paths.
+     */
+    function comparePathsCaseInsensitive(a: string, b: string): Comparison;
+    function comparePaths(a: string, b: string, ignoreCase?: boolean): Comparison;
+    function comparePaths(a: string, b: string, currentDirectory: string, ignoreCase?: boolean): Comparison;
+    function containsPath(parent: string, child: string, ignoreCase?: boolean): boolean;
+    function containsPath(parent: string, child: string, currentDirectory: string, ignoreCase?: boolean): boolean;
+    function tryRemoveDirectoryPrefix(path: string, dirPath: string): string | undefined;
+    function hasExtension(fileName: string): boolean;
+    const commonPackageFolders: ReadonlyArray<string>;
+    function getRegularExpressionForWildcard(specs: ReadonlyArray<string> | undefined, basePath: string, usage: "files" | "directories" | "exclude"): string | undefined;
+    /**
+     * An "includes" path "foo" is implicitly a glob "foo/** /*" (without the space) if its last component has no extension,
+     * and does not contain any glob characters itself.
+     */
+    function isImplicitGlob(lastPathComponent: string): boolean;
+    interface FileSystemEntries {
+        readonly files: ReadonlyArray<string>;
+        readonly directories: ReadonlyArray<string>;
+    }
+    interface FileMatcherPatterns {
+        /** One pattern for each "include" spec. */
+        includeFilePatterns: ReadonlyArray<string> | undefined;
+        /** One pattern matching one of any of the "include" specs. */
+        includeFilePattern: string | undefined;
+        includeDirectoryPattern: string | undefined;
+        excludePattern: string | undefined;
+        basePaths: ReadonlyArray<string>;
+    }
+    /** @param path directory of the tsconfig.json */
+    function getFileMatcherPatterns(path: string, excludes: ReadonlyArray<string> | undefined, includes: ReadonlyArray<string> | undefined, useCaseSensitiveFileNames: boolean, currentDirectory: string): FileMatcherPatterns;
+    function getRegexFromPattern(pattern: string, useCaseSensitiveFileNames: boolean): RegExp;
+    /** @param path directory of the tsconfig.json */
+    function matchFiles(path: string, extensions: ReadonlyArray<string> | undefined, excludes: ReadonlyArray<string> | undefined, includes: ReadonlyArray<string> | undefined, useCaseSensitiveFileNames: boolean, currentDirectory: string, depth: number | undefined, getFileSystemEntries: (path: string) => FileSystemEntries): string[];
+    function ensureScriptKind(fileName: string, scriptKind: ScriptKind | undefined): ScriptKind;
+    function getScriptKindFromFileName(fileName: string): ScriptKind;
+    /**
+     *  List of supported extensions in order of file resolution precedence.
+     */
+    const supportedTypeScriptExtensions: ReadonlyArray<Extension>;
+    /** Must have ".d.ts" first because if ".ts" goes first, that will be detected as the extension instead of ".d.ts". */
+    const supportedTypescriptExtensionsForExtractExtension: ReadonlyArray<Extension>;
+    const supportedJavascriptExtensions: ReadonlyArray<Extension>;
+    function getSupportedExtensions(options?: CompilerOptions, extraFileExtensions?: ReadonlyArray<FileExtensionInfo>): ReadonlyArray<string>;
+    function hasJavaScriptFileExtension(fileName: string): boolean;
+    function hasTypeScriptFileExtension(fileName: string): boolean;
+    function isSupportedSourceFileName(fileName: string, compilerOptions?: CompilerOptions, extraFileExtensions?: ReadonlyArray<FileExtensionInfo>): boolean;
+    /**
+     * Extension boundaries by priority. Lower numbers indicate higher priorities, and are
+     * aligned to the offset of the highest priority extension in the
+     * allSupportedExtensions array.
+     */
+    enum ExtensionPriority {
+        TypeScriptFiles = 0,
+        DeclarationAndJavaScriptFiles = 2,
+        Highest = 0,
+        Lowest = 2
+    }
+    function getExtensionPriority(path: string, supportedExtensions: ReadonlyArray<string>): ExtensionPriority;
+    /**
+     * Adjusts an extension priority to be the highest priority within the same range.
+     */
+    function adjustExtensionPriority(extensionPriority: ExtensionPriority, supportedExtensions: ReadonlyArray<string>): ExtensionPriority;
+    /**
+     * Gets the next lowest extension priority for a given priority.
+     */
+    function getNextLowestExtensionPriority(extensionPriority: ExtensionPriority, supportedExtensions: ReadonlyArray<string>): ExtensionPriority;
+    function removeFileExtension(path: string): string;
+    function tryRemoveExtension(path: string, extension: string): string | undefined;
+    function removeExtension(path: string, extension: string): string;
+    function changeExtension<T extends string | Path>(path: T, newExtension: string): T;
+    function changeAnyExtension(path: string, ext: string): string;
+    function changeAnyExtension(path: string, ext: string, extensions: string | ReadonlyArray<string>, ignoreCase: boolean): string;
+    namespace Debug {
+        function showSymbol(symbol: Symbol): string;
+        function showSyntaxKind(node: Node): string;
+    }
+    function tryParsePattern(pattern: string): Pattern | undefined;
+    function positionIsSynthesized(pos: number): boolean;
+    /** True if an extension is one of the supported TypeScript extensions. */
+    function extensionIsTypeScript(ext: Extension): boolean;
+    function resolutionExtensionIsTypeScriptOrJson(ext: Extension): boolean;
+    /**
+     * Gets the extension from a path.
+     * Path must have a valid extension.
+     */
+    function extensionFromPath(path: string): Extension;
+    function isAnySupportedFileExtension(path: string): boolean;
+    function tryGetExtensionFromPath(path: string): Extension | undefined;
+    /**
+     * Gets the file extension for a path.
+     */
+    function getAnyExtensionFromPath(path: string): string;
+    /**
+     * Gets the file extension for a path, provided it is one of the provided extensions.
+     */
+    function getAnyExtensionFromPath(path: string, extensions: string | ReadonlyArray<string>, ignoreCase: boolean): string;
+    function isCheckJsEnabledForFile(sourceFile: SourceFile, compilerOptions: CompilerOptions): boolean | undefined;
+    const emptyFileSystemEntries: FileSystemEntries;
+    /**
+     * patternStrings contains both pattern strings (containing "*") and regular strings.
+     * Return an exact match if possible, or a pattern match, or undefined.
+     * (These are verified by verifyCompilerOptions to have 0 or 1 "*" characters.)
+     */
+    function matchPatternOrExact(patternStrings: ReadonlyArray<string>, candidate: string): string | Pattern | undefined;
+}
 declare namespace ts {
     function createNode(kind: SyntaxKind, pos?: number, end?: number): Node;
+    function isJSDocLikeText(text: string, start: number): boolean;
     /**
      * Invokes a callback for each child of the given node. The 'cbNode' callback is invoked for all child nodes
      * stored in properties. If a 'cbNodes' callback is specified, it is invoked for embedded arrays; otherwise,
@@ -3483,8 +7376,198 @@ declare namespace ts {
     function parseJsonText(fileName: string, sourceText: string): JsonSourceFile;
     function isExternalModule(file: SourceFile): boolean;
     function updateSourceFile(sourceFile: SourceFile, newText: string, textChangeRange: TextChangeRange, aggressiveChecks?: boolean): SourceFile;
+    function parseIsolatedJSDocComment(content: string, start?: number, length?: number): {
+        jsDoc: JSDoc;
+        diagnostics: Diagnostic[];
+    } | undefined;
+    function parseJSDocTypeExpressionForTests(content: string, start?: number, length?: number): {
+        jsDocTypeExpression: JSDocTypeExpression;
+        diagnostics: Diagnostic[];
+    } | undefined;
+    interface PragmaContext {
+        languageVersion: ScriptTarget;
+        pragmas?: PragmaMap;
+        checkJsDirective?: CheckJsDirective;
+        referencedFiles: FileReference[];
+        typeReferenceDirectives: FileReference[];
+        libReferenceDirectives: FileReference[];
+        amdDependencies: AmdDependency[];
+        hasNoDefaultLib?: boolean;
+        moduleName?: string;
+    }
+    function processCommentPragmas(context: PragmaContext, sourceText: string): void;
+    type PragmaDiagnosticReporter = (pos: number, length: number, message: DiagnosticMessage) => void;
+    function processPragmasIntoFields(context: PragmaContext, reportDiagnostic: PragmaDiagnosticReporter): void;
+    /** @internal */
+    function tagNamesAreEquivalent(lhs: JsxTagNameExpression, rhs: JsxTagNameExpression): boolean;
+}
+declare namespace ts {
+    const compileOnSaveCommandLineOption: CommandLineOption;
+    /**
+     * An array of supported "lib" reference file names used to determine the order for inclusion
+     * when referenced, as well as for spelling suggestions. This ensures the correct ordering for
+     * overload resolution when a type declared in one lib is extended by another.
+     */
+    const libs: string[];
+    /**
+     * A map of lib names to lib files. This map is used both for parsing the "lib" command line
+     * option as well as for resolving lib reference directives.
+     */
+    const libMap: Map<string>;
+    const optionDeclarations: CommandLineOption[];
+    const typeAcquisitionDeclarations: CommandLineOption[];
+    interface OptionNameMap {
+        optionNameMap: Map<CommandLineOption>;
+        shortOptionNames: Map<string>;
+    }
+    const defaultInitCompilerOptions: CompilerOptions;
+    function convertEnableAutoDiscoveryToEnable(typeAcquisition: TypeAcquisition): TypeAcquisition;
+    function createCompilerDiagnosticForInvalidCustomType(opt: CommandLineOptionOfCustomType): Diagnostic;
+    function parseCustomTypeOption(opt: CommandLineOptionOfCustomType, value: string, errors: Push<Diagnostic>): string | number | undefined;
+    function parseListTypeOption(opt: CommandLineOptionOfListType, value: string | undefined, errors: Push<Diagnostic>): (string | number)[] | undefined;
+    function parseCommandLine(commandLine: ReadonlyArray<string>, readFile?: (path: string) => string | undefined): ParsedCommandLine;
+    /** @internal */
+    function getOptionFromName(optionName: string, allowShort?: boolean): CommandLineOption | undefined;
+    function printVersion(): void;
+    function printHelp(optionsList: CommandLineOption[], syntaxPrefix?: string): void;
+    type DiagnosticReporter = (diagnostic: Diagnostic) => void;
+    /**
+     * Reports config file diagnostics
+     */
+    interface ConfigFileDiagnosticsReporter {
+        /**
+         * Reports unrecoverable error when parsing config file
+         */
+        onUnRecoverableConfigFileDiagnostic: DiagnosticReporter;
+    }
+    /**
+     * Interface extending ParseConfigHost to support ParseConfigFile that reads config file and reports errors
+     */
+    interface ParseConfigFileHost extends ParseConfigHost, ConfigFileDiagnosticsReporter {
+        getCurrentDirectory(): string;
+    }
+    /**
+     * Reads the config file, reports errors if any and exits if the config file cannot be found
+     */
+    function getParsedCommandLineOfConfigFile(configFileName: string, optionsToExtend: CompilerOptions, host: ParseConfigFileHost): ParsedCommandLine | undefined;
+    /**
+     * Read tsconfig.json file
+     * @param fileName The path to the config file
+     */
+    function readConfigFile(fileName: string, readFile: (path: string) => string | undefined): {
+        config?: any;
+        error?: Diagnostic;
+    };
+    /**
+     * Parse the text of the tsconfig.json file
+     * @param fileName The path to the config file
+     * @param jsonText The text of the config file
+     */
+    function parseConfigFileTextToJson(fileName: string, jsonText: string): {
+        config?: any;
+        error?: Diagnostic;
+    };
+    /**
+     * Read tsconfig.json file
+     * @param fileName The path to the config file
+     */
+    function readJsonConfigFile(fileName: string, readFile: (path: string) => string | undefined): TsConfigSourceFile;
+    interface JsonConversionNotifier {
+        /**
+         * Notifies parent option object is being set with the optionKey and a valid optionValue
+         * Currently it notifies only if there is element with type object (parentOption) and
+         * has element's option declarations map associated with it
+         * @param parentOption parent option name in which the option and value are being set
+         * @param option option declaration which is being set with the value
+         * @param value value of the option
+         */
+        onSetValidOptionKeyValueInParent(parentOption: string, option: CommandLineOption, value: CompilerOptionsValue): void;
+        /**
+         * Notify when valid root key value option is being set
+         * @param key option key
+         * @param keyNode node corresponding to node in the source file
+         * @param value computed value of the key
+         * @param ValueNode node corresponding to value in the source file
+         */
+        onSetValidOptionKeyValueInRoot(key: string, keyNode: PropertyName, value: CompilerOptionsValue, valueNode: Expression): void;
+        /**
+         * Notify when unknown root key value option is being set
+         * @param key option key
+         * @param keyNode node corresponding to node in the source file
+         * @param value computed value of the key
+         * @param ValueNode node corresponding to value in the source file
+         */
+        onSetUnknownOptionKeyValueInRoot(key: string, keyNode: PropertyName, value: CompilerOptionsValue, valueNode: Expression): void;
+    }
+    /**
+     * Convert the json syntax tree into the json value
+     */
+    function convertToObject(sourceFile: JsonSourceFile, errors: Push<Diagnostic>): any;
+    /**
+     * Convert the json syntax tree into the json value and report errors
+     * This returns the json value (apart from checking errors) only if returnValue provided is true.
+     * Otherwise it just checks the errors and returns undefined
+     */
+    function convertToObjectWorker(sourceFile: JsonSourceFile, errors: Push<Diagnostic>, returnValue: boolean, knownRootOptions: CommandLineOption | undefined, jsonConversionNotifier: JsonConversionNotifier | undefined): any;
+    /**
+     * Generate tsconfig configuration when running command line "--init"
+     * @param options commandlineOptions to be generated into tsconfig.json
+     * @param fileNames array of filenames to be generated into tsconfig.json
+     */
+    function generateTSConfig(options: CompilerOptions, fileNames: ReadonlyArray<string>, newLine: string): string;
+    /**
+     * Parse the contents of a config file (tsconfig.json).
+     * @param json The contents of the config file to parse
+     * @param host Instance of ParseConfigHost used to enumerate files in folder.
+     * @param basePath A root directory to resolve relative path entries in the config
+     *    file to. e.g. outDir
+     */
+    function parseJsonConfigFileContent(json: any, host: ParseConfigHost, basePath: string, existingOptions?: CompilerOptions, configFileName?: string, resolutionStack?: Path[], extraFileExtensions?: ReadonlyArray<FileExtensionInfo>): ParsedCommandLine;
+    /**
+     * Parse the contents of a config file (tsconfig.json).
+     * @param jsonNode The contents of the config file to parse
+     * @param host Instance of ParseConfigHost used to enumerate files in folder.
+     * @param basePath A root directory to resolve relative path entries in the config
+     *    file to. e.g. outDir
+     */
+    function parseJsonSourceFileConfigFileContent(sourceFile: TsConfigSourceFile, host: ParseConfigHost, basePath: string, existingOptions?: CompilerOptions, configFileName?: string, resolutionStack?: Path[], extraFileExtensions?: ReadonlyArray<FileExtensionInfo>): ParsedCommandLine;
+    function setConfigFileInOptions(options: CompilerOptions, configFile: TsConfigSourceFile | undefined): void;
+    function isErrorNoInputFiles(error: Diagnostic): boolean;
+    function getErrorForNoInputFiles({ includeSpecs, excludeSpecs }: ConfigFileSpecs, configFileName: string | undefined): Diagnostic;
+    function convertCompilerOptionsFromJson(jsonOptions: any, basePath: string, configFileName?: string): {
+        options: CompilerOptions;
+        errors: Diagnostic[];
+    };
+    function convertTypeAcquisitionFromJson(jsonOptions: any, basePath: string, configFileName?: string): {
+        options: TypeAcquisition;
+        errors: Diagnostic[];
+    };
+    /**
+     * Gets the file names from the provided config file specs that contain, files, include, exclude and
+     * other properties needed to resolve the file names
+     * @param spec The config file specs extracted with file names to include, wildcards to include/exclude and other details
+     * @param basePath The base path for any relative file specifications.
+     * @param options Compiler options.
+     * @param host The host used to resolve files and directories.
+     * @param extraFileExtensions optionaly file extra file extension information from host
+     */
+    function getFileNamesFromConfigSpecs(spec: ConfigFileSpecs, basePath: string, options: CompilerOptions, host: ParseConfigHost, extraFileExtensions?: ReadonlyArray<FileExtensionInfo>): ExpandResult;
+    /**
+     * Produces a cleaned version of compiler options with personally identifiying info (aka, paths) removed.
+     * Also converts enum values back to strings.
+     */
+    function convertCompilerOptionsForTelemetry(opts: CompilerOptions): CompilerOptions;
 }
 declare namespace ts {
+    function trace(host: ModuleResolutionHost, message: DiagnosticMessage, ...args: any[]): void;
+    function isTraceEnabled(compilerOptions: CompilerOptions, host: ModuleResolutionHost): boolean;
+    /** Array that is only intended to be pushed to, never read. */
+    interface Push<T> {
+        push(value: T): void;
+    }
+    function readJson(path: string, host: {
+        readFile(fileName: string): string | undefined;
+    }): object;
     function getEffectiveTypeRoots(options: CompilerOptions, host: GetEffectiveTypeRootsHost): string[] | undefined;
     /**
      * @param {string | undefined} containingFile - file that contains type reference directive, can be undefined if containing file is unknown.
@@ -3520,35 +7603,105 @@ declare namespace ts {
         set(directory: string, result: ResolvedModuleWithFailedLookupLocations): void;
     }
     function createModuleResolutionCache(currentDirectory: string, getCanonicalFileName: (s: string) => string): ModuleResolutionCache;
+    function createModuleResolutionCacheWithMaps(directoryToModuleNameMap: Map<Map<ResolvedModuleWithFailedLookupLocations>>, moduleNameToDirectoryMap: Map<PerModuleNameCache>, currentDirectory: string, getCanonicalFileName: GetCanonicalFileName): ModuleResolutionCache;
     function resolveModuleNameFromCache(moduleName: string, containingFile: string, cache: ModuleResolutionCache): ResolvedModuleWithFailedLookupLocations | undefined;
     function resolveModuleName(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost, cache?: ModuleResolutionCache): ResolvedModuleWithFailedLookupLocations;
     function nodeModuleNameResolver(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost, cache?: ModuleResolutionCache): ResolvedModuleWithFailedLookupLocations;
+    /**
+     * Expose resolution logic to allow us to use Node module resolution logic from arbitrary locations.
+     * No way to do this with `require()`: https://github.com/nodejs/node/issues/5963
+     * Throws an error if the module can't be resolved.
+     */
+    function resolveJavaScriptModule(moduleName: string, initialDir: string, host: ModuleResolutionHost): string;
+    function directoryProbablyExists(directoryName: string, host: {
+        directoryExists?: (directoryName: string) => boolean;
+    }): boolean;
+    function getPackageName(moduleName: string): {
+        packageName: string;
+        rest: string;
+    };
+    function getTypesPackageName(packageName: string): string;
+    function getMangledNameForScopedPackage(packageName: string): string;
+    function getPackageNameFromAtTypesDirectory(mangledName: string): string;
+    function getUnmangledNameForScopedPackage(typesPackageName: string): string;
     function classicNameResolver(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost, cache?: NonRelativeModuleNameResolutionCache): ResolvedModuleWithFailedLookupLocations;
+    /**
+     * LSHost may load a module from a global cache of typings.
+     * This is the minumum code needed to expose that functionality; the rest is in LSHost.
+     */
+    function loadModuleFromGlobalCache(moduleName: string, projectName: string | undefined, compilerOptions: CompilerOptions, host: ModuleResolutionHost, globalCache: string): ResolvedModuleWithFailedLookupLocations;
 }
 declare namespace ts {
-    function createNodeArray<T extends Node>(elements?: ReadonlyArray<T>, hasTrailingComma?: boolean): NodeArray<T>;
-    /** If a node is passed, creates a string literal whose source text is read from a source node during emit. */
-    function createLiteral(value: string | StringLiteral | NoSubstitutionTemplateLiteral | NumericLiteral | Identifier): StringLiteral;
-    function createLiteral(value: number): NumericLiteral;
-    function createLiteral(value: boolean): BooleanLiteral;
+    enum ModuleInstanceState {
+        NonInstantiated = 0,
+        Instantiated = 1,
+        ConstEnumOnly = 2
+    }
+    function getModuleInstanceState(node: ModuleDeclaration): ModuleInstanceState;
+    function bindSourceFile(file: SourceFile, options: CompilerOptions): void;
+    function isExportsOrModuleExportsOrAlias(sourceFile: SourceFile, node: Expression): boolean;
+    /**
+     * Computes the transform flags for a node, given the transform flags of its subtree
+     *
+     * @param node The node to analyze
+     * @param subtreeFlags Transform flags computed for this node's subtree
+     */
+    function computeTransformFlagsForNode(node: Node, subtreeFlags: TransformFlags): TransformFlags;
+    /**
+     * Gets the transform flags to exclude when unioning the transform flags of a subtree.
+     *
+     * NOTE: This needs to be kept up-to-date with the exclusions used in `computeTransformFlagsForNode`.
+     *       For performance reasons, `computeTransformFlagsForNode` uses local constant values rather
+     *       than calling this function.
+     */
+    function getTransformFlagsSubtreeExclusions(kind: SyntaxKind): TransformFlags;
+}
+/** @internal */
+declare namespace ts {
+    function createGetSymbolWalker(getRestTypeOfSignature: (sig: Signature) => Type, getTypePredicateOfSignature: (sig: Signature) => TypePredicate | undefined, getReturnTypeOfSignature: (sig: Signature) => Type, getBaseTypes: (type: Type) => Type[], resolveStructuredTypeMembers: (type: ObjectType) => ResolvedType, getTypeOfSymbol: (sym: Symbol) => Type, getResolvedSymbol: (node: Node) => Symbol, getIndexTypeOfStructuredType: (type: Type, kind: IndexKind) => Type | undefined, getConstraintFromTypeParameter: (typeParameter: TypeParameter) => Type | undefined, getFirstIdentifier: (node: EntityNameOrEntityNameExpression) => Identifier): (accept?: (symbol: Symbol) => boolean) => SymbolWalker;
+}
+declare namespace ts {
+    function getNodeId(node: Node): number;
+    function getSymbolId(symbol: Symbol): number;
+    function isInstantiatedModule(node: ModuleDeclaration, preserveConstEnums: boolean): boolean;
+    function createTypeChecker(host: TypeCheckerHost, produceDiagnostics: boolean): TypeChecker;
+}
+declare namespace ts {
+    function updateNode<T extends Node>(updated: T, original: T): T;
+    function createNodeArray<T extends Node>(elements?: T[], hasTrailingComma?: boolean): MutableNodeArray<T>;
+    function createNodeArray<T extends Node>(elements?: ReadonlyArray<T>, hasTrailingComma?: boolean): NodeArray<T>;
+    /**
+     * Creates a shallow, memberwise clone of a node with no source map location.
+     */
+    function getSynthesizedClone<T extends Node>(node: T): T;
+    function createLiteral(value: string | StringLiteral | NoSubstitutionTemplateLiteral | NumericLiteral | Identifier, isSingleQuote: boolean): StringLiteral;
+    /** If a node is passed, creates a string literal whose source text is read from a source node during emit. */
+    function createLiteral(value: string | StringLiteral | NoSubstitutionTemplateLiteral | NumericLiteral | Identifier): StringLiteral;
+    function createLiteral(value: number): NumericLiteral;
+    function createLiteral(value: boolean): BooleanLiteral;
     function createLiteral(value: string | number | boolean): PrimaryExpression;
     function createNumericLiteral(value: string): NumericLiteral;
     function createStringLiteral(text: string): StringLiteral;
     function createRegularExpressionLiteral(text: string): RegularExpressionLiteral;
     function createIdentifier(text: string): Identifier;
+    function createIdentifier(text: string, typeArguments: ReadonlyArray<TypeNode | TypeParameterDeclaration> | undefined): Identifier;
     function updateIdentifier(node: Identifier): Identifier;
+    function updateIdentifier(node: Identifier, typeArguments: NodeArray<TypeNode | TypeParameterDeclaration> | undefined): Identifier;
     /** Create a unique temporary variable. */
     function createTempVariable(recordTempVariable: ((node: Identifier) => void) | undefined): Identifier;
+    function createTempVariable(recordTempVariable: ((node: Identifier) => void) | undefined, reservedInNestedScopes: boolean): GeneratedIdentifier;
     /** Create a unique temporary variable for use in a loop. */
     function createLoopVariable(): Identifier;
     /** Create a unique name based on the supplied text. */
     function createUniqueName(text: string): Identifier;
+    function createOptimisticUniqueName(text: string): GeneratedIdentifier;
     /** Create a unique name based on the supplied text. */
     function createOptimisticUniqueName(text: string): Identifier;
     /** Create a unique name based on the supplied text. This does not consider names injected by the transformer. */
     function createFileLevelUniqueName(text: string): Identifier;
     /** Create a unique name generated for a node. */
     function getGeneratedNameForNode(node: Node): Identifier;
+    function getGeneratedNameForNode(node: Node, flags: GeneratedIdentifierFlags): Identifier;
     function createToken<TKind extends SyntaxKind>(token: TKind): Token<TKind>;
     function createSuper(): SuperExpression;
     function createThis(): ThisExpression & Token<SyntaxKind.ThisKeyword>;
@@ -3587,6 +7740,7 @@ declare namespace ts {
     function updateConstructSignature(node: ConstructSignatureDeclaration, typeParameters: NodeArray<TypeParameterDeclaration> | undefined, parameters: NodeArray<ParameterDeclaration>, type: TypeNode | undefined): ConstructSignatureDeclaration;
     function createIndexSignature(decorators: ReadonlyArray<Decorator> | undefined, modifiers: ReadonlyArray<Modifier> | undefined, parameters: ReadonlyArray<ParameterDeclaration>, type: TypeNode): IndexSignatureDeclaration;
     function updateIndexSignature(node: IndexSignatureDeclaration, decorators: ReadonlyArray<Decorator> | undefined, modifiers: ReadonlyArray<Modifier> | undefined, parameters: ReadonlyArray<ParameterDeclaration>, type: TypeNode): IndexSignatureDeclaration;
+    function createSignatureDeclaration(kind: SyntaxKind, typeParameters: ReadonlyArray<TypeParameterDeclaration> | undefined, parameters: ReadonlyArray<ParameterDeclaration>, type: TypeNode | undefined, typeArguments?: ReadonlyArray<TypeNode> | undefined): SignatureDeclaration;
     function createKeywordTypeNode(kind: KeywordTypeNode["kind"]): KeywordTypeNode;
     function createTypePredicateNode(parameterName: Identifier | ThisTypeNode | string, type: TypeNode): TypePredicateNode;
     function updateTypePredicateNode(node: TypePredicateNode, parameterName: Identifier | ThisTypeNode, type: TypeNode): TypePredicateNode;
@@ -3647,6 +7801,8 @@ declare namespace ts {
     function updateNew(node: NewExpression, expression: Expression, typeArguments: ReadonlyArray<TypeNode> | undefined, argumentsArray: ReadonlyArray<Expression> | undefined): NewExpression;
     function createTaggedTemplate(tag: Expression, template: TemplateLiteral): TaggedTemplateExpression;
     function createTaggedTemplate(tag: Expression, typeArguments: ReadonlyArray<TypeNode> | undefined, template: TemplateLiteral): TaggedTemplateExpression;
+    /** @internal */
+    function createTaggedTemplate(tag: Expression, typeArgumentsOrTemplate: ReadonlyArray<TypeNode> | TemplateLiteral | undefined, template?: TemplateLiteral): TaggedTemplateExpression;
     function updateTaggedTemplate(node: TaggedTemplateExpression, tag: Expression, template: TemplateLiteral): TaggedTemplateExpression;
     function updateTaggedTemplate(node: TaggedTemplateExpression, tag: Expression, typeArguments: ReadonlyArray<TypeNode> | undefined, template: TemplateLiteral): TaggedTemplateExpression;
     function createTypeAssertion(type: TypeNode, expression: Expression): TypeAssertion;
@@ -3702,6 +7858,7 @@ declare namespace ts {
     function updateTemplateSpan(node: TemplateSpan, expression: Expression, literal: TemplateMiddle | TemplateTail): TemplateSpan;
     function createSemicolonClassElement(): SemicolonClassElement;
     function createBlock(statements: ReadonlyArray<Statement>, multiLine?: boolean): Block;
+    function createExpressionStatement(expression: Expression): ExpressionStatement;
     function updateBlock(node: Block, statements: ReadonlyArray<Statement>): Block;
     function createVariableStatement(modifiers: ReadonlyArray<Modifier> | undefined, declarationList: VariableDeclarationList | ReadonlyArray<VariableDeclaration>): VariableStatement;
     function updateVariableStatement(node: VariableStatement, modifiers: ReadonlyArray<Modifier> | undefined, declarationList: VariableDeclarationList): VariableStatement;
@@ -3827,6 +7984,16 @@ declare namespace ts {
      * @param original The original statement.
      */
     function createNotEmittedStatement(original: Node): NotEmittedStatement;
+    /**
+     * Creates a synthetic element to act as a placeholder for the end of an emitted declaration in
+     * order to properly emit exports.
+     */
+    function createEndOfDeclarationMarker(original: Node): EndOfDeclarationMarker;
+    /**
+     * Creates a synthetic element to act as a placeholder for the beginning of a merged declaration in
+     * order to properly emit exports.
+     */
+    function createMergeDeclarationMarker(original: Node): MergeDeclarationMarker;
     /**
      * Creates a synthetic expression to act as a placeholder for a not-emitted expression in
      * order to preserve comments or sourcemap positions.
@@ -3867,11 +8034,20 @@ declare namespace ts {
      * @param sourceFile A source file.
      */
     function disposeEmitNodes(sourceFile: SourceFile): void;
+    /**
+     * Associates a node with the current transformation, initializing
+     * various transient transformation properties.
+     */
+    function getOrCreateEmitNode(node: Node): EmitNode;
     function setTextRange<T extends TextRange>(range: T, location: TextRange | undefined): T;
     /**
      * Sets flags that control emit behavior of a node.
      */
     function setEmitFlags<T extends Node>(node: T, emitFlags: EmitFlags): T;
+    /**
+     * Sets flags that control emit behavior of a node.
+     */
+    function addEmitFlags<T extends Node>(node: T, emitFlags: EmitFlags): T;
     /**
      * Gets a custom text range to use when emitting source maps.
      */
@@ -3892,6 +8068,14 @@ declare namespace ts {
      * Sets the TextRange to use for source maps for a token of a node.
      */
     function setTokenSourceMapRange<T extends Node>(node: T, token: SyntaxKind, range: SourceMapRange | undefined): T;
+    /**
+     * Gets a custom text range to use when emitting comments.
+     */
+    function getStartsOnNewLine(node: Node): boolean | undefined;
+    /**
+     * Sets a custom text range to use when emitting comments.
+     */
+    function setStartsOnNewLine<T extends Node>(node: T, newLine: boolean): T;
     /**
      * Gets a custom text range to use when emitting comments.
      */
@@ -3935,8 +8119,262 @@ declare namespace ts {
      * Moves matching emit helpers from a source node to a target node.
      */
     function moveEmitHelpers(source: Node, target: Node, predicate: (helper: EmitHelper) => boolean): void;
+    function compareEmitHelpers(x: EmitHelper, y: EmitHelper): Comparison;
     function setOriginalNode<T extends Node>(node: T, original: Node | undefined): T;
 }
+declare namespace ts {
+    const nullTransformationContext: TransformationContext;
+    type TypeOfTag = "undefined" | "number" | "boolean" | "string" | "symbol" | "object" | "function";
+    function createTypeCheck(value: Expression, tag: TypeOfTag): BinaryExpression;
+    function createMemberAccessForPropertyName(target: Expression, memberName: PropertyName, location?: TextRange): MemberExpression;
+    function createFunctionCall(func: Expression, thisArg: Expression, argumentsList: ReadonlyArray<Expression>, location?: TextRange): CallExpression;
+    function createFunctionApply(func: Expression, thisArg: Expression, argumentsExpression: Expression, location?: TextRange): CallExpression;
+    function createArraySlice(array: Expression, start?: number | Expression): CallExpression;
+    function createArrayConcat(array: Expression, values: ReadonlyArray<Expression>): CallExpression;
+    function createMathPow(left: Expression, right: Expression, location?: TextRange): CallExpression;
+    function createExpressionForJsxElement(jsxFactoryEntity: EntityName | undefined, reactNamespace: string, tagName: Expression, props: Expression, children: ReadonlyArray<Expression>, parentElement: JsxOpeningLikeElement, location: TextRange): LeftHandSideExpression;
+    function createExpressionForJsxFragment(jsxFactoryEntity: EntityName | undefined, reactNamespace: string, children: ReadonlyArray<Expression>, parentElement: JsxOpeningFragment, location: TextRange): LeftHandSideExpression;
+    function getHelperName(name: string): Identifier;
+    function createValuesHelper(context: TransformationContext, expression: Expression, location?: TextRange): CallExpression;
+    function createReadHelper(context: TransformationContext, iteratorRecord: Expression, count: number | undefined, location?: TextRange): CallExpression;
+    function createSpreadHelper(context: TransformationContext, argumentList: ReadonlyArray<Expression>, location?: TextRange): CallExpression;
+    function createForOfBindingStatement(node: ForInitializer, boundValue: Expression): Statement;
+    function insertLeadingStatement(dest: Statement, source: Statement): Block;
+    function restoreEnclosingLabel(node: Statement, outermostLabeledStatement: LabeledStatement | undefined, afterRestoreLabelCallback?: (node: LabeledStatement) => void): Statement;
+    interface CallBinding {
+        target: LeftHandSideExpression;
+        thisArg: Expression;
+    }
+    function createCallBinding(expression: Expression, recordTempVariable: (temp: Identifier) => void, languageVersion?: ScriptTarget, cacheIdentifiers?: boolean): CallBinding;
+    function inlineExpressions(expressions: ReadonlyArray<Expression>): Expression;
+    function createExpressionFromEntityName(node: EntityName | Expression): Expression;
+    function createExpressionForPropertyName(memberName: PropertyName): Expression;
+    function createExpressionForObjectLiteralElementLike(node: ObjectLiteralExpression, property: ObjectLiteralElementLike, receiver: Expression): Expression | undefined;
+    /**
+     * Gets the internal name of a declaration. This is primarily used for declarations that can be
+     * referred to by name in the body of an ES5 class function body. An internal name will *never*
+     * be prefixed with an module or namespace export modifier like "exports." when emitted as an
+     * expression. An internal name will also *never* be renamed due to a collision with a block
+     * scoped variable.
+     *
+     * @param node The declaration.
+     * @param allowComments A value indicating whether comments may be emitted for the name.
+     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
+     */
+    function getInternalName(node: Declaration, allowComments?: boolean, allowSourceMaps?: boolean): Identifier;
+    /**
+     * Gets whether an identifier should only be referred to by its internal name.
+     */
+    function isInternalName(node: Identifier): boolean;
+    /**
+     * Gets the local name of a declaration. This is primarily used for declarations that can be
+     * referred to by name in the declaration's immediate scope (classes, enums, namespaces). A
+     * local name will *never* be prefixed with an module or namespace export modifier like
+     * "exports." when emitted as an expression.
+     *
+     * @param node The declaration.
+     * @param allowComments A value indicating whether comments may be emitted for the name.
+     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
+     */
+    function getLocalName(node: Declaration, allowComments?: boolean, allowSourceMaps?: boolean): Identifier;
+    /**
+     * Gets whether an identifier should only be referred to by its local name.
+     */
+    function isLocalName(node: Identifier): boolean;
+    /**
+     * Gets the export name of a declaration. This is primarily used for declarations that can be
+     * referred to by name in the declaration's immediate scope (classes, enums, namespaces). An
+     * export name will *always* be prefixed with an module or namespace export modifier like
+     * `"exports."` when emitted as an expression if the name points to an exported symbol.
+     *
+     * @param node The declaration.
+     * @param allowComments A value indicating whether comments may be emitted for the name.
+     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
+     */
+    function getExportName(node: Declaration, allowComments?: boolean, allowSourceMaps?: boolean): Identifier;
+    /**
+     * Gets whether an identifier should only be referred to by its export representation if the
+     * name points to an exported symbol.
+     */
+    function isExportName(node: Identifier): boolean;
+    /**
+     * Gets the name of a declaration for use in declarations.
+     *
+     * @param node The declaration.
+     * @param allowComments A value indicating whether comments may be emitted for the name.
+     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
+     */
+    function getDeclarationName(node: Declaration, allowComments?: boolean, allowSourceMaps?: boolean): Identifier;
+    /**
+     * Gets the exported name of a declaration for use in expressions.
+     *
+     * An exported name will *always* be prefixed with an module or namespace export modifier like
+     * "exports." if the name points to an exported symbol.
+     *
+     * @param ns The namespace identifier.
+     * @param node The declaration.
+     * @param allowComments A value indicating whether comments may be emitted for the name.
+     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
+     */
+    function getExternalModuleOrNamespaceExportName(ns: Identifier | undefined, node: Declaration, allowComments?: boolean, allowSourceMaps?: boolean): Identifier | PropertyAccessExpression;
+    /**
+     * Gets a namespace-qualified name for use in expressions.
+     *
+     * @param ns The namespace identifier.
+     * @param name The name.
+     * @param allowComments A value indicating whether comments may be emitted for the name.
+     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
+     */
+    function getNamespaceMemberName(ns: Identifier, name: Identifier, allowComments?: boolean, allowSourceMaps?: boolean): PropertyAccessExpression;
+    function convertToFunctionBody(node: ConciseBody, multiLine?: boolean): Block;
+    function convertFunctionDeclarationToExpression(node: FunctionDeclaration): FunctionExpression;
+    /**
+     * Add any necessary prologue-directives into target statement-array.
+     * The function needs to be called during each transformation step.
+     * This function needs to be called whenever we transform the statement
+     * list of a source file, namespace, or function-like body.
+     *
+     * @param target: result statements array
+     * @param source: origin statements array
+     * @param ensureUseStrict: boolean determining whether the function need to add prologue-directives
+     * @param visitor: Optional callback used to visit any custom prologue directives.
+     */
+    function addPrologue(target: Statement[], source: ReadonlyArray<Statement>, ensureUseStrict?: boolean, visitor?: (node: Node) => VisitResult<Node>): number;
+    /**
+     * Add just the standard (string-expression) prologue-directives into target statement-array.
+     * The function needs to be called during each transformation step.
+     * This function needs to be called whenever we transform the statement
+     * list of a source file, namespace, or function-like body.
+     */
+    function addStandardPrologue(target: Statement[], source: ReadonlyArray<Statement>, ensureUseStrict?: boolean): number;
+    /**
+     * Add just the custom prologue-directives into target statement-array.
+     * The function needs to be called during each transformation step.
+     * This function needs to be called whenever we transform the statement
+     * list of a source file, namespace, or function-like body.
+     */
+    function addCustomPrologue(target: Statement[], source: ReadonlyArray<Statement>, statementOffset: number, visitor?: (node: Node) => VisitResult<Node>): number;
+    function addCustomPrologue(target: Statement[], source: ReadonlyArray<Statement>, statementOffset: number | undefined, visitor?: (node: Node) => VisitResult<Node>): number | undefined;
+    function startsWithUseStrict(statements: ReadonlyArray<Statement>): boolean;
+    /**
+     * Ensures "use strict" directive is added
+     *
+     * @param statements An array of statements
+     */
+    function ensureUseStrict(statements: NodeArray<Statement>): NodeArray<Statement>;
+    /**
+     * Wraps the operand to a BinaryExpression in parentheses if they are needed to preserve the intended
+     * order of operations.
+     *
+     * @param binaryOperator The operator for the BinaryExpression.
+     * @param operand The operand for the BinaryExpression.
+     * @param isLeftSideOfBinary A value indicating whether the operand is the left side of the
+     *                           BinaryExpression.
+     */
+    function parenthesizeBinaryOperand(binaryOperator: SyntaxKind, operand: Expression, isLeftSideOfBinary: boolean, leftOperand?: Expression): Expression;
+    function parenthesizeForConditionalHead(condition: Expression): Expression;
+    function parenthesizeSubexpressionOfConditionalExpression(e: Expression): Expression;
+    /**
+     *  [Per the spec](https://tc39.github.io/ecma262/#prod-ExportDeclaration), `export default` accepts _AssigmentExpression_ but
+     *  has a lookahead restriction for `function`, `async function`, and `class`.
+     *
+     * Basically, that means we need to parenthesize in the following cases:
+     *
+     * - BinaryExpression of CommaToken
+     * - CommaList (synthetic list of multiple comma expressions)
+     * - FunctionExpression
+     * - ClassExpression
+     */
+    function parenthesizeDefaultExpression(e: Expression): Expression;
+    /**
+     * Wraps an expression in parentheses if it is needed in order to use the expression
+     * as the expression of a NewExpression node.
+     *
+     * @param expression The Expression node.
+     */
+    function parenthesizeForNew(expression: Expression): LeftHandSideExpression;
+    /**
+     * Wraps an expression in parentheses if it is needed in order to use the expression for
+     * property or element access.
+     *
+     * @param expr The expression node.
+     */
+    function parenthesizeForAccess(expression: Expression): LeftHandSideExpression;
+    function parenthesizePostfixOperand(operand: Expression): LeftHandSideExpression;
+    function parenthesizePrefixOperand(operand: Expression): UnaryExpression;
+    function parenthesizeListElements(elements: NodeArray<Expression>): NodeArray<Expression>;
+    function parenthesizeExpressionForList(expression: Expression): Expression;
+    function parenthesizeExpressionForExpressionStatement(expression: Expression): Expression;
+    function parenthesizeConditionalTypeMember(member: TypeNode): TypeNode;
+    function parenthesizeElementTypeMember(member: TypeNode): TypeNode;
+    function parenthesizeArrayTypeMember(member: TypeNode): TypeNode;
+    function parenthesizeElementTypeMembers(members: ReadonlyArray<TypeNode>): NodeArray<TypeNode>;
+    function parenthesizeTypeParameters(typeParameters: ReadonlyArray<TypeNode> | undefined): MutableNodeArray<TypeNode> | undefined;
+    function parenthesizeConciseBody(body: ConciseBody): ConciseBody;
+    enum OuterExpressionKinds {
+        Parentheses = 1,
+        Assertions = 2,
+        PartiallyEmittedExpressions = 4,
+        All = 7
+    }
+    type OuterExpression = ParenthesizedExpression | TypeAssertion | AsExpression | NonNullExpression | PartiallyEmittedExpression;
+    function isOuterExpression(node: Node, kinds?: OuterExpressionKinds): node is OuterExpression;
+    function skipOuterExpressions(node: Expression, kinds?: OuterExpressionKinds): Expression;
+    function skipOuterExpressions(node: Node, kinds?: OuterExpressionKinds): Node;
+    function skipAssertions(node: Expression): Expression;
+    function skipAssertions(node: Node): Node;
+    function recreateOuterExpressions(outerExpression: Expression | undefined, innerExpression: Expression, kinds?: OuterExpressionKinds): Expression;
+    function startOnNewLine<T extends Node>(node: T): T;
+    function getExternalHelpersModuleName(node: SourceFile): Identifier | undefined;
+    function getOrCreateExternalHelpersModuleNameIfNeeded(node: SourceFile, compilerOptions: CompilerOptions, hasExportStarsToExportValues?: boolean, hasImportStarOrImportDefault?: boolean): Identifier | undefined;
+    /**
+     * Get the name of that target module from an import or export declaration
+     */
+    function getLocalNameForExternalImport(node: ImportDeclaration | ExportDeclaration | ImportEqualsDeclaration, sourceFile: SourceFile): Identifier | undefined;
+    /**
+     * Get the name of a target module from an import/export declaration as should be written in the emitted output.
+     * The emitted output name can be different from the input if:
+     *  1. The module has a /// <amd-module name="<new name>" />
+     *  2. --out or --outFile is used, making the name relative to the rootDir
+     *  3- The containing SourceFile has an entry in renamedDependencies for the import as requested by some module loaders (e.g. System).
+     * Otherwise, a new StringLiteral node representing the module name will be returned.
+     */
+    function getExternalModuleNameLiteral(importNode: ImportDeclaration | ExportDeclaration | ImportEqualsDeclaration, sourceFile: SourceFile, host: EmitHost, resolver: EmitResolver, compilerOptions: CompilerOptions): StringLiteral | undefined;
+    /**
+     * Get the name of a module as should be written in the emitted output.
+     * The emitted output name can be different from the input if:
+     *  1. The module has a /// <amd-module name="<new name>" />
+     *  2. --out or --outFile is used, making the name relative to the rootDir
+     * Otherwise, a new StringLiteral node representing the module name will be returned.
+     */
+    function tryGetModuleNameFromFile(file: SourceFile | undefined, host: EmitHost, options: CompilerOptions): StringLiteral | undefined;
+    /**
+     * Gets the initializer of an BindingOrAssignmentElement.
+     */
+    function getInitializerOfBindingOrAssignmentElement(bindingElement: BindingOrAssignmentElement): Expression | undefined;
+    /**
+     * Gets the name of an BindingOrAssignmentElement.
+     */
+    function getTargetOfBindingOrAssignmentElement(bindingElement: BindingOrAssignmentElement): BindingOrAssignmentElementTarget | undefined;
+    /**
+     * Determines whether an BindingOrAssignmentElement is a rest element.
+     */
+    function getRestIndicatorOfBindingOrAssignmentElement(bindingElement: BindingOrAssignmentElement): BindingOrAssignmentElementRestIndicator | undefined;
+    /**
+     * Gets the property name of a BindingOrAssignmentElement
+     */
+    function getPropertyNameOfBindingOrAssignmentElement(bindingElement: BindingOrAssignmentElement): Identifier | StringLiteral | NumericLiteral | ComputedPropertyName | undefined;
+    /**
+     * Gets the elements of a BindingOrAssignmentPattern
+     */
+    function getElementsOfBindingOrAssignmentPattern(name: BindingOrAssignmentPattern): ReadonlyArray<BindingOrAssignmentElement>;
+    function convertToArrayAssignmentElement(element: BindingOrAssignmentElement): Expression;
+    function convertToObjectAssignmentElement(element: BindingOrAssignmentElement): ObjectLiteralElementLike;
+    function convertToAssignmentPattern(node: BindingOrAssignmentPattern): AssignmentPattern;
+    function convertToObjectAssignmentPattern(node: ObjectBindingOrAssignmentPattern): ObjectLiteralExpression;
+    function convertToArrayAssignmentPattern(node: ArrayBindingOrAssignmentPattern): ArrayLiteralExpression;
+    function convertToAssignmentElementTarget(node: BindingOrAssignmentElementTarget): Expression;
+}
 declare namespace ts {
     /**
      * Visits a Node using the supplied visitor, possibly returning a new Node in its place.
@@ -4019,11 +8457,357 @@ declare namespace ts {
     function visitEachChild<T extends Node>(node: T | undefined, visitor: Visitor, context: TransformationContext, nodesVisitor?: typeof visitNodes, tokenVisitor?: Visitor): T | undefined;
 }
 declare namespace ts {
+    /**
+     * Similar to `reduceLeft`, performs a reduction against each child of a node.
+     * NOTE: Unlike `forEachChild`, this does *not* visit every node.
+     *
+     * @param node The node containing the children to reduce.
+     * @param initial The initial value to supply to the reduction.
+     * @param f The callback function
+     */
+    function reduceEachChild<T>(node: Node | undefined, initial: T, cbNode: (memo: T, node: Node) => T, cbNodeArray?: (memo: T, nodes: NodeArray<Node>) => T): T;
+    /**
+     * Merges generated lexical declarations into a new statement list.
+     */
+    function mergeLexicalEnvironment(statements: NodeArray<Statement>, declarations: ReadonlyArray<Statement> | undefined): NodeArray<Statement>;
+    /**
+     * Appends generated lexical declarations to an array of statements.
+     */
+    function mergeLexicalEnvironment(statements: Statement[], declarations: ReadonlyArray<Statement> | undefined): Statement[];
+    /**
+     * Lifts a NodeArray containing only Statement nodes to a block.
+     *
+     * @param nodes The NodeArray.
+     */
+    function liftToBlock(nodes: ReadonlyArray<Node>): Statement;
+    /**
+     * Aggregates the TransformFlags for a Node and its subtree.
+     */
+    function aggregateTransformFlags<T extends Node>(node: T): T;
+    namespace Debug {
+        function failBadSyntaxKind(node: Node, message?: string): never;
+        const assertEachNode: (nodes: Node[], test: (node: Node) => boolean, message?: string | undefined) => void;
+        const assertNode: (node: Node | undefined, test: ((node: Node | undefined) => boolean) | undefined, message?: string | undefined) => void;
+        const assertOptionalNode: (node: Node, test: (node: Node) => boolean, message?: string | undefined) => void;
+        const assertOptionalToken: (node: Node, kind: SyntaxKind, message?: string | undefined) => void;
+        const assertMissingNode: typeof noop;
+        /**
+         * Injects debug information into frequently used types.
+         */
+        function enableDebugInfo(): void;
+    }
+}
+declare namespace ts {
+    function getOriginalNodeId(node: Node): number;
+    interface ExternalModuleInfo {
+        externalImports: (ImportDeclaration | ImportEqualsDeclaration | ExportDeclaration)[];
+        externalHelpersImportDeclaration: ImportDeclaration | undefined;
+        exportSpecifiers: Map<ExportSpecifier[]>;
+        exportedBindings: Identifier[][];
+        exportedNames: Identifier[] | undefined;
+        exportEquals: ExportAssignment | undefined;
+        hasExportStarsToExportValues: boolean;
+    }
+    function chainBundle(transformSourceFile: (x: SourceFile) => SourceFile): (x: SourceFile | Bundle) => SourceFile | Bundle;
+    function getImportNeedsImportStarHelper(node: ImportDeclaration): boolean;
+    function getImportNeedsImportDefaultHelper(node: ImportDeclaration): boolean;
+    function collectExternalModuleInfo(sourceFile: SourceFile, resolver: EmitResolver, compilerOptions: CompilerOptions): ExternalModuleInfo;
+    /**
+     * Used in the module transformer to check if an expression is reasonably without sideeffect,
+     *  and thus better to copy into multiple places rather than to cache in a temporary variable
+     *  - this is mostly subjective beyond the requirement that the expression not be sideeffecting
+     */
+    function isSimpleCopiableExpression(expression: Expression): boolean;
+    /**
+     * @param input Template string input strings
+     * @param args Names which need to be made file-level unique
+     */
+    function helperString(input: TemplateStringsArray, ...args: string[]): (uniqueName: EmitHelperUniqueNameCallback) => string;
+}
+declare namespace ts {
+    enum FlattenLevel {
+        All = 0,
+        ObjectRest = 1
+    }
+    /**
+     * Flattens a DestructuringAssignment or a VariableDeclaration to an expression.
+     *
+     * @param node The node to flatten.
+     * @param visitor An optional visitor used to visit initializers.
+     * @param context The transformation context.
+     * @param level Indicates the extent to which flattening should occur.
+     * @param needsValue An optional value indicating whether the value from the right-hand-side of
+     * the destructuring assignment is needed as part of a larger expression.
+     * @param createAssignmentCallback An optional callback used to create the assignment expression.
+     */
+    function flattenDestructuringAssignment(node: VariableDeclaration | DestructuringAssignment, visitor: ((node: Node) => VisitResult<Node>) | undefined, context: TransformationContext, level: FlattenLevel, needsValue?: boolean, createAssignmentCallback?: (name: Identifier, value: Expression, location?: TextRange) => Expression): Expression;
+    /**
+     * Flattens a VariableDeclaration or ParameterDeclaration to one or more variable declarations.
+     *
+     * @param node The node to flatten.
+     * @param visitor An optional visitor used to visit initializers.
+     * @param context The transformation context.
+     * @param boundValue The value bound to the declaration.
+     * @param skipInitializer A value indicating whether to ignore the initializer of `node`.
+     * @param hoistTempVariables Indicates whether temporary variables should not be recorded in-line.
+     * @param level Indicates the extent to which flattening should occur.
+     */
+    function flattenDestructuringBinding(node: VariableDeclaration | ParameterDeclaration, visitor: (node: Node) => VisitResult<Node>, context: TransformationContext, level: FlattenLevel, rval?: Expression, hoistTempVariables?: boolean, skipInitializer?: boolean): VariableDeclaration[];
+}
+declare namespace ts {
+    function transformTypeScript(context: TransformationContext): (node: SourceFile | Bundle) => SourceFile | Bundle;
+}
+declare namespace ts {
+    function transformES2017(context: TransformationContext): (x: SourceFile | Bundle) => SourceFile | Bundle;
+    const asyncSuperHelper: EmitHelper;
+    const advancedAsyncSuperHelper: EmitHelper;
+}
+declare namespace ts {
+    function transformESNext(context: TransformationContext): (x: SourceFile | Bundle) => SourceFile | Bundle;
+    function createAssignHelper(context: TransformationContext, attributesSegments: Expression[]): CallExpression;
+}
+declare namespace ts {
+    function transformJsx(context: TransformationContext): (x: SourceFile | Bundle) => SourceFile | Bundle;
+}
+declare namespace ts {
+    function transformES2016(context: TransformationContext): (x: SourceFile | Bundle) => SourceFile | Bundle;
+}
+declare namespace ts {
+    function transformES2015(context: TransformationContext): (x: SourceFile | Bundle) => SourceFile | Bundle;
+}
+declare namespace ts {
+    /**
+     * Transforms ES5 syntax into ES3 syntax.
+     *
+     * @param context Context and state information for the transformation.
+     */
+    function transformES5(context: TransformationContext): (x: SourceFile | Bundle) => SourceFile | Bundle;
+}
+declare namespace ts {
+    function transformGenerators(context: TransformationContext): (x: SourceFile | Bundle) => SourceFile | Bundle;
+}
+declare namespace ts {
+    function transformModule(context: TransformationContext): (x: SourceFile | Bundle) => SourceFile | Bundle;
+}
+declare namespace ts {
+    function transformSystemModule(context: TransformationContext): (x: SourceFile | Bundle) => SourceFile | Bundle;
+}
+declare namespace ts {
+    function transformES2015Module(context: TransformationContext): (x: SourceFile | Bundle) => SourceFile | Bundle;
+}
+declare namespace ts {
+    type GetSymbolAccessibilityDiagnostic = (symbolAccessibilityResult: SymbolAccessibilityResult) => (SymbolAccessibilityDiagnostic | undefined);
+    interface SymbolAccessibilityDiagnostic {
+        errorNode: Node;
+        diagnosticMessage: DiagnosticMessage;
+        typeName?: DeclarationName | QualifiedName;
+    }
+    type DeclarationDiagnosticProducing = VariableDeclaration | PropertyDeclaration | PropertySignature | BindingElement | SetAccessorDeclaration | GetAccessorDeclaration | ConstructSignatureDeclaration | CallSignatureDeclaration | MethodDeclaration | MethodSignature | FunctionDeclaration | ParameterDeclaration | TypeParameterDeclaration | ExpressionWithTypeArguments | ImportEqualsDeclaration | TypeAliasDeclaration | ConstructorDeclaration | IndexSignatureDeclaration;
+    function canProduceDiagnostics(node: Node): node is DeclarationDiagnosticProducing;
+    function createGetSymbolAccessibilityDiagnosticForNodeName(node: DeclarationDiagnosticProducing): (symbolAccessibilityResult: SymbolAccessibilityResult) => SymbolAccessibilityDiagnostic | undefined;
+    function createGetSymbolAccessibilityDiagnosticForNode(node: DeclarationDiagnosticProducing): (symbolAccessibilityResult: SymbolAccessibilityResult) => SymbolAccessibilityDiagnostic | undefined;
+}
+declare namespace ts {
+    function getDeclarationDiagnostics(host: EmitHost, resolver: EmitResolver, file: SourceFile | undefined): DiagnosticWithLocation[] | undefined;
+    /**
+     * Transforms a ts file into a .d.ts file
+     * This process requires type information, which is retrieved through the emit resolver. Because of this,
+     * in many places this transformer assumes it will be operating on parse tree nodes directly.
+     * This means that _no transforms should be allowed to occur before this one_.
+     */
+    function transformDeclarations(context: TransformationContext): {
+        (node: Bundle): Bundle;
+        (node: SourceFile): SourceFile;
+        (node: SourceFile | Bundle): SourceFile | Bundle;
+    };
+}
+declare namespace ts {
+    function getTransformers(compilerOptions: CompilerOptions, customTransformers?: CustomTransformers): TransformerFactory<SourceFile | Bundle>[];
+    /**
+     * Transforms an array of SourceFiles by passing them through each transformer.
+     *
+     * @param resolver The emit resolver provided by the checker.
+     * @param host The emit host object used to interact with the file system.
+     * @param options Compiler options to surface in the `TransformationContext`.
+     * @param nodes An array of nodes to transform.
+     * @param transforms An array of `TransformerFactory` callbacks.
+     * @param allowDtsFiles A value indicating whether to allow the transformation of .d.ts files.
+     */
+    function transformNodes<T extends Node>(resolver: EmitResolver | undefined, host: EmitHost | undefined, options: CompilerOptions, nodes: ReadonlyArray<T>, transformers: ReadonlyArray<TransformerFactory<T>>, allowDtsFiles: boolean): TransformationResult<T>;
+}
+declare namespace ts {
+    interface SourceMapWriter {
+        /**
+         * Initialize the SourceMapWriter for a new output file.
+         *
+         * @param filePath The path to the generated output file.
+         * @param sourceMapFilePath The path to the output source map file.
+         * @param sourceFileOrBundle The input source file or bundle for the program.
+         */
+        initialize(filePath: string, sourceMapFilePath: string | undefined, sourceFileOrBundle: SourceFile | Bundle, sourceMapOutput?: SourceMapData[]): void;
+        /**
+         * Reset the SourceMapWriter to an empty state.
+         */
+        reset(): void;
+        /**
+         * Set the current source file.
+         *
+         * @param sourceFile The source file.
+         */
+        setSourceFile(sourceFile: SourceMapSource): void;
+        /**
+         * Emits a mapping.
+         *
+         * If the position is synthetic (undefined or a negative value), no mapping will be
+         * created.
+         *
+         * @param pos The position.
+         */
+        emitPos(pos: number): void;
+        /**
+         * Emits a node with possible leading and trailing source maps.
+         *
+         * @param hint The current emit context
+         * @param node The node to emit.
+         * @param emitCallback The callback used to emit the node.
+         */
+        emitNodeWithSourceMap(hint: EmitHint, node: Node, emitCallback: (hint: EmitHint, node: Node) => void): void;
+        /**
+         * Emits a token of a node node with possible leading and trailing source maps.
+         *
+         * @param node The node containing the token.
+         * @param token The token to emit.
+         * @param tokenStartPos The start pos of the token.
+         * @param emitCallback The callback used to emit the token.
+         */
+        emitTokenWithSourceMap(node: Node, token: SyntaxKind, writer: (s: string) => void, tokenStartPos: number, emitCallback: (token: SyntaxKind, writer: (s: string) => void, tokenStartPos: number) => number): number;
+        /**
+         * Gets the text for the source map.
+         */
+        getText(): string;
+        /**
+         * Gets the SourceMappingURL for the source map.
+         */
+        getSourceMappingURL(): string;
+    }
+    interface SourceMapOptions {
+        sourceMap?: boolean;
+        inlineSourceMap?: boolean;
+        inlineSources?: boolean;
+        sourceRoot?: string;
+        mapRoot?: string;
+        extendedDiagnostics?: boolean;
+    }
+    function createSourceMapWriter(host: EmitHost, writer: EmitTextWriter, compilerOptions?: SourceMapOptions): SourceMapWriter;
+}
+declare namespace ts {
+    interface CommentWriter {
+        reset(): void;
+        setSourceFile(sourceFile: SourceFile): void;
+        setWriter(writer: EmitTextWriter | undefined): void;
+        emitNodeWithComments(hint: EmitHint, node: Node | undefined, emitCallback: (hint: EmitHint, node: Node) => void): void;
+        emitBodyWithDetachedComments(node: Node, detachedRange: TextRange, emitCallback: (node: Node) => void): void;
+        emitTrailingCommentsOfPosition(pos: number, prefixSpace?: boolean): void;
+        emitLeadingCommentsOfPosition(pos: number): void;
+    }
+    function createCommentWriter(printerOptions: PrinterOptions, emitPos: ((pos: number) => void) | undefined): CommentWriter;
+}
+declare namespace ts {
+    /**
+     * Iterates over the source files that are expected to have an emit output.
+     *
+     * @param host An EmitHost.
+     * @param action The action to execute.
+     * @param sourceFilesOrTargetSourceFile
+     *   If an array, the full list of source files to emit.
+     *   Else, calls `getSourceFilesToEmit` with the (optional) target source file to determine the list of source files to emit.
+     */
+    function forEachEmittedFile<T>(host: EmitHost, action: (emitFileNames: EmitFileNames, sourceFileOrBundle: SourceFile | Bundle) => T, sourceFilesOrTargetSourceFile?: ReadonlyArray<SourceFile> | SourceFile, emitOnlyDtsFiles?: boolean): T | undefined;
+    function getOutputPathsFor(sourceFile: SourceFile | Bundle, host: EmitHost, forceDtsPaths: boolean): EmitFileNames;
+    function getOutputExtension(sourceFile: SourceFile, options: CompilerOptions): Extension;
+    function emitFiles(resolver: EmitResolver, host: EmitHost, targetSourceFile: SourceFile, emitOnlyDtsFiles?: boolean, transformers?: TransformerFactory<Bundle | SourceFile>[], declarationTransformers?: TransformerFactory<Bundle | SourceFile>[]): EmitResult;
     function createPrinter(printerOptions?: PrinterOptions, handlers?: PrintHandlers): Printer;
 }
+declare namespace ts {
+    /**
+     * Partial interface of the System thats needed to support the caching of directory structure
+     */
+    interface DirectoryStructureHost {
+        fileExists(path: string): boolean;
+        readFile(path: string, encoding?: string): string | undefined;
+        directoryExists?(path: string): boolean;
+        getDirectories?(path: string): string[];
+        readDirectory?(path: string, extensions?: ReadonlyArray<string>, exclude?: ReadonlyArray<string>, include?: ReadonlyArray<string>, depth?: number): string[];
+        createDirectory?(path: string): void;
+        writeFile?(path: string, data: string, writeByteOrderMark?: boolean): void;
+    }
+    interface FileAndDirectoryExistence {
+        fileExists: boolean;
+        directoryExists: boolean;
+    }
+    interface CachedDirectoryStructureHost extends DirectoryStructureHost {
+        useCaseSensitiveFileNames: boolean;
+        getDirectories(path: string): string[];
+        readDirectory(path: string, extensions?: ReadonlyArray<string>, exclude?: ReadonlyArray<string>, include?: ReadonlyArray<string>, depth?: number): string[];
+        /** Returns the queried result for the file exists and directory exists if at all it was done */
+        addOrDeleteFileOrDirectory(fileOrDirectory: string, fileOrDirectoryPath: Path): FileAndDirectoryExistence | undefined;
+        addOrDeleteFile(fileName: string, filePath: Path, eventKind: FileWatcherEventKind): void;
+        clearCache(): void;
+    }
+    function createCachedDirectoryStructureHost(host: DirectoryStructureHost, currentDirectory: string, useCaseSensitiveFileNames: boolean): CachedDirectoryStructureHost | undefined;
+    enum ConfigFileProgramReloadLevel {
+        None = 0,
+        /** Update the file name list from the disk */
+        Partial = 1,
+        /** Reload completely by re-reading contents of config file from disk and updating program */
+        Full = 2
+    }
+    /**
+     * Updates the existing missing file watches with the new set of missing files after new program is created
+     */
+    function updateMissingFilePathsWatch(program: Program, missingFileWatches: Map<FileWatcher>, createMissingFileWatch: (missingFilePath: Path) => FileWatcher): void;
+    interface WildcardDirectoryWatcher {
+        watcher: FileWatcher;
+        flags: WatchDirectoryFlags;
+    }
+    /**
+     * Updates the existing wild card directory watches with the new set of wild card directories from the config file
+     * after new program is created because the config file was reloaded or program was created first time from the config file
+     * Note that there is no need to call this function when the program is updated with additional files without reloading config files,
+     * as wildcard directories wont change unless reloading config file
+     */
+    function updateWatchingWildcardDirectories(existingWatchedForWildcards: Map<WildcardDirectoryWatcher>, wildcardDirectories: Map<WatchDirectoryFlags>, watchDirectory: (directory: string, flags: WatchDirectoryFlags) => FileWatcher): void;
+    function isEmittedFileOfProgram(program: Program | undefined, file: string): boolean;
+    enum WatchLogLevel {
+        None = 0,
+        TriggerOnly = 1,
+        Verbose = 2
+    }
+    interface WatchFileHost {
+        watchFile(path: string, callback: FileWatcherCallback, pollingInterval?: number): FileWatcher;
+    }
+    interface WatchDirectoryHost {
+        watchDirectory(path: string, callback: DirectoryWatcherCallback, recursive?: boolean): FileWatcher;
+    }
+    type WatchFile<X, Y> = (host: WatchFileHost, file: string, callback: FileWatcherCallback, pollingInterval: PollingInterval, detailInfo1?: X, detailInfo2?: Y) => FileWatcher;
+    type FilePathWatcherCallback = (fileName: string, eventKind: FileWatcherEventKind, filePath: Path) => void;
+    type WatchFilePath<X, Y> = (host: WatchFileHost, file: string, callback: FilePathWatcherCallback, pollingInterval: PollingInterval, path: Path, detailInfo1?: X, detailInfo2?: Y) => FileWatcher;
+    type WatchDirectory<X, Y> = (host: WatchDirectoryHost, directory: string, callback: DirectoryWatcherCallback, flags: WatchDirectoryFlags, detailInfo1?: X, detailInfo2?: Y) => FileWatcher;
+    interface WatchFactory<X, Y> {
+        watchFile: WatchFile<X, Y>;
+        watchFilePath: WatchFilePath<X, Y>;
+        watchDirectory: WatchDirectory<X, Y>;
+    }
+    function getWatchFactory<X, Y = undefined>(watchLogLevel: WatchLogLevel, log: (s: string) => void, getDetailWatchInfo?: GetDetailWatchInfo<X, Y>): WatchFactory<X, Y>;
+    type GetDetailWatchInfo<X, Y> = (detailInfo1: X, detailInfo2: Y | undefined) => string;
+    function closeFileWatcherOf<T extends {
+        watcher: FileWatcher;
+    }>(objWithWatcher: T): void;
+}
 declare namespace ts {
     function findConfigFile(searchPath: string, fileExists: (fileName: string) => boolean, configName?: string): string | undefined;
     function resolveTripleslashReference(moduleName: string, containingFile: string): string;
+    function computeCommonSourceDirectoryOfFilenames(fileNames: string[], currentDirectory: string, getCanonicalFileName: GetCanonicalFileName): string;
     function createCompilerHost(options: CompilerOptions, setParentNodes?: boolean): CompilerHost;
     function getPreEmitDiagnostics(program: Program, sourceFile?: SourceFile, cancellationToken?: CancellationToken): Diagnostic[];
     interface FormatDiagnosticsHost {
@@ -4033,8 +8817,22 @@ declare namespace ts {
     }
     function formatDiagnostics(diagnostics: ReadonlyArray<Diagnostic>, host: FormatDiagnosticsHost): string;
     function formatDiagnostic(diagnostic: Diagnostic, host: FormatDiagnosticsHost): string;
+    /** @internal */
+    enum ForegroundColorEscapeSequences {
+        Grey = "\u001B[90m",
+        Red = "\u001B[91m",
+        Yellow = "\u001B[93m",
+        Blue = "\u001B[94m",
+        Cyan = "\u001B[96m"
+    }
+    /** @internal */
+    function formatColorAndReset(text: string, formatStyle: string): string;
     function formatDiagnosticsWithColorAndContext(diagnostics: ReadonlyArray<Diagnostic>, host: FormatDiagnosticsHost): string;
     function flattenDiagnosticMessageText(messageText: string | DiagnosticMessageChain | undefined, newLine: string): string;
+    /**
+     * Determines if program structure is upto date or needs to be recreated
+     */
+    function isProgramUptoDate(program: Program | undefined, rootFileNames: string[], newOptions: CompilerOptions, getSourceVersion: (path: Path) => string | undefined, fileExists: (fileName: string) => boolean, hasInvalidatedResolution: HasInvalidatedResolution, hasChangedAutomaticTypeDirectiveNames: boolean): boolean;
     function getConfigFileParsingDiagnostics(configFileParseResult: ParsedCommandLine): ReadonlyArray<Diagnostic>;
     /**
      * Create a new 'Program' instance. A Program is an immutable collection of 'SourceFile's and a 'CompilerOptions'
@@ -4062,10 +8860,17 @@ declare namespace ts {
      * @returns A 'Program' object.
      */
     function createProgram(rootNames: ReadonlyArray<string>, options: CompilerOptions, host?: CompilerHost, oldProgram?: Program, configFileParsingDiagnostics?: ReadonlyArray<Diagnostic>): Program;
+    function parseConfigHostFromCompilerHost(host: CompilerHost): ParseConfigFileHost;
     /**
      * Returns the target config filename of a project reference
      */
     function resolveProjectReferencePath(host: CompilerHost, ref: ProjectReference): string | undefined;
+    /**
+     * Returns a DiagnosticMessage if we won't include a resolved module due to its extension.
+     * The DiagnosticMessage's parameters are the imported module name, and the filename it resolved to.
+     * This returns a diagnostic even if the module will be an untyped module.
+     */
+    function getResolutionDiagnostic(options: CompilerOptions, { extension }: ResolvedModuleFull): DiagnosticMessage | undefined;
 }
 declare namespace ts {
     interface EmitOutput {
@@ -4079,37 +8884,158 @@ declare namespace ts {
     }
 }
 declare namespace ts {
-    type AffectedFileResult<T> = {
-        result: T;
-        affected: SourceFile | Program;
-    } | undefined;
-    interface BuilderProgramHost {
+    function getFileEmitOutput(program: Program, sourceFile: SourceFile, emitOnlyDtsFiles: boolean, cancellationToken?: CancellationToken, customTransformers?: CustomTransformers): EmitOutput;
+    interface BuilderState {
         /**
-         * return true if file names are treated with case sensitivity
+         * Information of the file eg. its version, signature etc
          */
-        useCaseSensitiveFileNames(): boolean;
+        fileInfos: Map<BuilderState.FileInfo>;
         /**
-         * If provided this would be used this hash instead of actual file shape text for detecting changes
+         * Contains the map of ReferencedSet=Referenced files of the file if module emit is enabled
+         * Otherwise undefined
+         * Thus non undefined value indicates, module emit
          */
-        createHash?: (data: string) => string;
+        readonly referencedMap: ReadonlyMap<BuilderState.ReferencedSet> | undefined;
         /**
-         * When emit or emitNextAffectedFile are called without writeFile,
-         * this callback if present would be used to write files
+         * Map of files that have already called update signature.
+         * That means hence forth these files are assumed to have
+         * no change in their signature for this version of the program
          */
-        writeFile?: WriteFileCallback;
+        hasCalledUpdateShapeSignature: Map<true>;
+        /**
+         * Cache of all files excluding default library file for the current program
+         */
+        allFilesExcludingDefaultLibraryFile: ReadonlyArray<SourceFile> | undefined;
+        /**
+         * Cache of all the file names
+         */
+        allFileNames: ReadonlyArray<string> | undefined;
     }
+}
+declare namespace ts.BuilderState {
     /**
-     * Builder to manage the program state changes
+     * Information about the source file: Its version and optional signature from last emit
      */
-    interface BuilderProgram {
+    interface FileInfo {
+        readonly version: string;
+        signature: string | undefined;
+    }
+    /**
+     * Referenced files with values for the keys as referenced file's path to be true
+     */
+    type ReferencedSet = ReadonlyMap<true>;
+    /**
+     * Compute the hash to store the shape of the file
+     */
+    type ComputeHash = (data: string) => string;
+    /**
+     * Returns true if oldState is reusable, that is the emitKind = module/non module has not changed
+     */
+    function canReuseOldState(newReferencedMap: ReadonlyMap<ReferencedSet> | undefined, oldState: Readonly<BuilderState> | undefined): boolean | undefined;
+    /**
+     * Creates the state of file references and signature for the new program from oldState if it is safe
+     */
+    function create(newProgram: Program, getCanonicalFileName: GetCanonicalFileName, oldState?: Readonly<BuilderState>): BuilderState;
+    /**
+     * Gets the files affected by the path from the program
+     */
+    function getFilesAffectedBy(state: BuilderState, programOfThisState: Program, path: Path, cancellationToken: CancellationToken | undefined, computeHash: ComputeHash, cacheToUpdateSignature?: Map<string>): ReadonlyArray<SourceFile>;
+    /**
+     * Updates the signatures from the cache into state's fileinfo signatures
+     * This should be called whenever it is safe to commit the state of the builder
+     */
+    function updateSignaturesFromCache(state: BuilderState, signatureCache: Map<string>): void;
+    /**
+     * Get all the dependencies of the sourceFile
+     */
+    function getAllDependencies(state: BuilderState, programOfThisState: Program, sourceFile: SourceFile): ReadonlyArray<string>;
+}
+declare namespace ts {
+    /**
+     * State to store the changed files, affected files and cache semantic diagnostics
+     */
+    interface BuilderProgramState extends BuilderState {
         /**
-         * Returns current program
+         * Cache of semantic diagnostics for files with their Path being the key
          */
-        getProgram(): Program;
+        semanticDiagnosticsPerFile: Map<ReadonlyArray<Diagnostic>> | undefined;
         /**
-         * Get compiler options of the program
+         * The map has key by source file's path that has been changed
          */
-        getCompilerOptions(): CompilerOptions;
+        changedFilesSet: Map<true>;
+        /**
+         * Set of affected files being iterated
+         */
+        affectedFiles: ReadonlyArray<SourceFile> | undefined;
+        /**
+         * Current index to retrieve affected file from
+         */
+        affectedFilesIndex: number | undefined;
+        /**
+         * Current changed file for iterating over affected files
+         */
+        currentChangedFilePath: Path | undefined;
+        /**
+         * Map of file signatures, with key being file path, calculated while getting current changed file's affected files
+         * These will be commited whenever the iteration through affected files of current changed file is complete
+         */
+        currentAffectedFilesSignatures: Map<string> | undefined;
+        /**
+         * Already seen affected files
+         */
+        seenAffectedFiles: Map<true> | undefined;
+        /**
+         * program corresponding to this state
+         */
+        program: Program;
+    }
+    enum BuilderProgramKind {
+        SemanticDiagnosticsBuilderProgram = 0,
+        EmitAndSemanticDiagnosticsBuilderProgram = 1
+    }
+    interface BuilderCreationParameters {
+        newProgram: Program;
+        host: BuilderProgramHost;
+        oldProgram: BuilderProgram | undefined;
+        configFileParsingDiagnostics: ReadonlyArray<Diagnostic>;
+    }
+    function getBuilderCreationParameters(newProgramOrRootNames: Program | ReadonlyArray<string> | undefined, hostOrOptions: BuilderProgramHost | CompilerOptions | undefined, oldProgramOrHost?: BuilderProgram | CompilerHost, configFileParsingDiagnosticsOrOldProgram?: ReadonlyArray<Diagnostic> | BuilderProgram, configFileParsingDiagnostics?: ReadonlyArray<Diagnostic>): BuilderCreationParameters;
+    function createBuilderProgram(kind: BuilderProgramKind.SemanticDiagnosticsBuilderProgram, builderCreationParameters: BuilderCreationParameters): SemanticDiagnosticsBuilderProgram;
+    function createBuilderProgram(kind: BuilderProgramKind.EmitAndSemanticDiagnosticsBuilderProgram, builderCreationParameters: BuilderCreationParameters): EmitAndSemanticDiagnosticsBuilderProgram;
+}
+declare namespace ts {
+    type AffectedFileResult<T> = {
+        result: T;
+        affected: SourceFile | Program;
+    } | undefined;
+    interface BuilderProgramHost {
+        /**
+         * return true if file names are treated with case sensitivity
+         */
+        useCaseSensitiveFileNames(): boolean;
+        /**
+         * If provided this would be used this hash instead of actual file shape text for detecting changes
+         */
+        createHash?: (data: string) => string;
+        /**
+         * When emit or emitNextAffectedFile are called without writeFile,
+         * this callback if present would be used to write files
+         */
+        writeFile?: WriteFileCallback;
+    }
+    /**
+     * Builder to manage the program state changes
+     */
+    interface BuilderProgram {
+        getState(): BuilderProgramState;
+        /**
+         * Returns current program
+         */
+        getProgram(): Program;
+        /**
+         * Get compiler options of the program
+         */
+        getCompilerOptions(): CompilerOptions;
         /**
          * Get the source file in the program with file name
          */
@@ -4203,6 +9129,99 @@ declare namespace ts {
     function createAbstractBuilder(newProgram: Program, host: BuilderProgramHost, oldProgram?: BuilderProgram, configFileParsingDiagnostics?: ReadonlyArray<Diagnostic>): BuilderProgram;
     function createAbstractBuilder(rootNames: ReadonlyArray<string> | undefined, options: CompilerOptions | undefined, host?: CompilerHost, oldProgram?: BuilderProgram, configFileParsingDiagnostics?: ReadonlyArray<Diagnostic>): BuilderProgram;
 }
+declare namespace ts {
+    /** This is the cache of module/typedirectives resolution that can be retained across program */
+    interface ResolutionCache {
+        startRecordingFilesWithChangedResolutions(): void;
+        finishRecordingFilesWithChangedResolutions(): Path[] | undefined;
+        resolveModuleNames(moduleNames: string[], containingFile: string, reusedNames: string[] | undefined): ResolvedModuleFull[];
+        getResolvedModuleWithFailedLookupLocationsFromCache(moduleName: string, containingFile: string): CachedResolvedModuleWithFailedLookupLocations | undefined;
+        resolveTypeReferenceDirectives(typeDirectiveNames: string[], containingFile: string): ResolvedTypeReferenceDirective[];
+        invalidateResolutionOfFile(filePath: Path): void;
+        removeResolutionsOfFile(filePath: Path): void;
+        setFilesWithInvalidatedNonRelativeUnresolvedImports(filesWithUnresolvedImports: Map<ReadonlyArray<string>>): void;
+        createHasInvalidatedResolution(forceAllFilesAsInvalidated?: boolean): HasInvalidatedResolution;
+        startCachingPerDirectoryResolution(): void;
+        finishCachingPerDirectoryResolution(): void;
+        updateTypeRootsWatch(): void;
+        closeTypeRootsWatch(): void;
+        clear(): void;
+    }
+    interface ResolutionWithFailedLookupLocations {
+        readonly failedLookupLocations: ReadonlyArray<string>;
+        isInvalidated?: boolean;
+        refCount?: number;
+    }
+    interface CachedResolvedModuleWithFailedLookupLocations extends ResolvedModuleWithFailedLookupLocations, ResolutionWithFailedLookupLocations {
+    }
+    interface ResolutionCacheHost extends ModuleResolutionHost {
+        toPath(fileName: string): Path;
+        getCanonicalFileName: GetCanonicalFileName;
+        getCompilationSettings(): CompilerOptions;
+        watchDirectoryOfFailedLookupLocation(directory: string, cb: DirectoryWatcherCallback, flags: WatchDirectoryFlags): FileWatcher;
+        onInvalidatedResolution(): void;
+        watchTypeRootsDirectory(directory: string, cb: DirectoryWatcherCallback, flags: WatchDirectoryFlags): FileWatcher;
+        onChangedAutomaticTypeDirectiveNames(): void;
+        getCachedDirectoryStructureHost(): CachedDirectoryStructureHost | undefined;
+        projectName?: string;
+        getGlobalCache?(): string | undefined;
+        writeLog(s: string): void;
+        maxNumberOfFilesToIterateForInvalidation?: number;
+        getCurrentProgram(): Program;
+    }
+    const maxNumberOfFilesToIterateForInvalidation = 256;
+    function createResolutionCache(resolutionHost: ResolutionCacheHost, rootDirForResolution: string | undefined, logChangesWhenResolvingModule: boolean): ResolutionCache;
+}
+declare namespace ts.moduleSpecifiers {
+    interface ModuleSpecifierPreferences {
+        importModuleSpecifierPreference?: "relative" | "non-relative";
+    }
+    function getModuleSpecifier(compilerOptions: CompilerOptions, fromSourceFile: SourceFile, fromSourceFileName: string, toFileName: string, host: ModuleSpecifierResolutionHost, preferences?: ModuleSpecifierPreferences): string;
+    function getModuleSpecifiers(moduleSymbol: Symbol, program: Program, importingSourceFile: SourceFile, host: ModuleSpecifierResolutionHost, preferences: ModuleSpecifierPreferences): ReadonlyArray<ReadonlyArray<string>>;
+}
+declare namespace ts {
+    /**
+     * Create a function that reports error by writing to the system and handles the formating of the diagnostic
+     */
+    function createDiagnosticReporter(system: System, pretty?: boolean): DiagnosticReporter;
+    /** @internal */
+    const nonClearingMessageCodes: number[];
+    /** @internal */
+    const screenStartingMessageCodes: number[];
+    /**
+     * Create a function that reports watch status by writing to the system and handles the formating of the diagnostic
+     */
+    function createWatchStatusReporter(system: System, pretty?: boolean): WatchStatusReporter;
+    /** Parses config file using System interface */
+    function parseConfigFileWithSystem(configFileName: string, optionsToExtend: CompilerOptions, system: System, reportDiagnostic: DiagnosticReporter): ParsedCommandLine | undefined;
+    /**
+     * Program structure needed to emit the files and report diagnostics
+     */
+    interface ProgramToEmitFilesAndReportErrors {
+        getCurrentDirectory(): string;
+        getCompilerOptions(): CompilerOptions;
+        getSourceFiles(): ReadonlyArray<SourceFile>;
+        getSyntacticDiagnostics(): ReadonlyArray<Diagnostic>;
+        getOptionsDiagnostics(): ReadonlyArray<Diagnostic>;
+        getGlobalDiagnostics(): ReadonlyArray<Diagnostic>;
+        getSemanticDiagnostics(): ReadonlyArray<Diagnostic>;
+        getConfigFileParsingDiagnostics(): ReadonlyArray<Diagnostic>;
+        emit(): EmitResult;
+    }
+    type ReportEmitErrorSummary = (errorCount: number) => void;
+    /**
+     * Helper that emit files, report diagnostics and lists emitted and/or source files depending on compiler options
+     */
+    function emitFilesAndReportErrors(program: ProgramToEmitFilesAndReportErrors, reportDiagnostic: DiagnosticReporter, writeFileName?: (s: string) => void, reportSummary?: ReportEmitErrorSummary): ExitStatus;
+    /**
+     * Creates the watch compiler host from system for config file in watch mode
+     */
+    function createWatchCompilerHostOfConfigFile<T extends BuilderProgram = EmitAndSemanticDiagnosticsBuilderProgram>(configFileName: string, optionsToExtend: CompilerOptions | undefined, system: System, createProgram?: CreateProgram<T>, reportDiagnostic?: DiagnosticReporter, reportWatchStatus?: WatchStatusReporter): WatchCompilerHostOfConfigFile<T>;
+    /**
+     * Creates the watch compiler host from system for compiling root files and options in watch mode
+     */
+    function createWatchCompilerHostOfFilesAndCompilerOptions<T extends BuilderProgram = EmitAndSemanticDiagnosticsBuilderProgram>(rootFiles: string[], options: CompilerOptions, system: System, createProgram?: CreateProgram<T>, reportDiagnostic?: DiagnosticReporter, reportWatchStatus?: WatchStatusReporter): WatchCompilerHostOfFilesAndCompilerOptions<T>;
+}
 declare namespace ts {
     type WatchStatusReporter = (diagnostic: Diagnostic, newLine: string, options: CompilerOptions) => void;
     /** Create the program with rootNames and options, if they are undefined, oldProgram and new configFile diagnostics create new program */
@@ -4216,6 +9235,7 @@ declare namespace ts {
         afterProgramCreate?(program: T): void;
         /** If provided, called with Diagnostic message that informs about change in watch status */
         onWatchStatusChange?(diagnostic: Diagnostic, newLine: string, options: CompilerOptions): void;
+        maxNumberOfFilesToIterateForInvalidation?: number;
         useCaseSensitiveFileNames(): boolean;
         getNewLine(): string;
         getCurrentDirectory(): string;
@@ -4257,6 +9277,12 @@ declare namespace ts {
         /** If provided, will be used to reset existing delayed compilation */
         clearTimeout?(timeoutId: any): void;
     }
+    /** Internal interface used to wire emit through same host */
+    interface WatchCompilerHost<T extends BuilderProgram> {
+        createDirectory?(path: string): void;
+        writeFile?(path: string, data: string, writeByteOrderMark?: boolean): void;
+        onCachedDirectoryStructureHostCreate?(host: CachedDirectoryStructureHost): void;
+    }
     /**
      * Host to create watch with root files and options
      */
@@ -4280,9 +9306,18 @@ declare namespace ts {
          */
         readDirectory(path: string, extensions?: ReadonlyArray<string>, exclude?: ReadonlyArray<string>, include?: ReadonlyArray<string>, depth?: number): string[];
     }
+    /**
+     * Host to create watch with config file that is already parsed (from tsc)
+     */
+    interface WatchCompilerHostOfConfigFile<T extends BuilderProgram> extends WatchCompilerHost<T> {
+        optionsToExtend?: CompilerOptions;
+        configFileParsingResult?: ParsedCommandLine;
+    }
     interface Watch<T> {
         /** Synchronize with host and get updated program */
         getProgram(): T;
+        /** Gets the existing program without synchronizing with changes on host */
+        getCurrentProgram(): T;
     }
     /**
      * Creates the watch what generates program using the config file
@@ -4311,149 +9346,441 @@ declare namespace ts {
     function createWatchProgram<T extends BuilderProgram>(host: WatchCompilerHostOfConfigFile<T>): WatchOfConfigFile<T>;
 }
 declare namespace ts {
-    function parseCommandLine(commandLine: ReadonlyArray<string>, readFile?: (path: string) => string | undefined): ParsedCommandLine;
-    type DiagnosticReporter = (diagnostic: Diagnostic) => void;
     /**
-     * Reports config file diagnostics
+     * Branded string for keeping track of when we've turned an ambiguous path
+     * specified like "./blah" to an absolute path to an actual
+     * tsconfig file, e.g. "/root/blah/tsconfig.json"
      */
-    interface ConfigFileDiagnosticsReporter {
-        /**
-         * Reports unrecoverable error when parsing config file
-         */
-        onUnRecoverableConfigFileDiagnostic: DiagnosticReporter;
+    type ResolvedConfigFileName = string & {
+        _isResolvedConfigFileName: never;
+    };
+    interface BuildHost {
+        verbose(diag: DiagnosticMessage, ...args: string[]): void;
+        error(diag: DiagnosticMessage, ...args: string[]): void;
+        errorDiagnostic(diag: Diagnostic): void;
+        message(diag: DiagnosticMessage, ...args: string[]): void;
     }
     /**
-     * Interface extending ParseConfigHost to support ParseConfigFile that reads config file and reports errors
+     * A BuildContext tracks what's going on during the course of a build.
+     *
+     * Callers may invoke any number of build requests within the same context;
+     * until the context is reset, each project will only be built at most once.
+     *
+     * Example: In a standard setup where project B depends on project A, and both are out of date,
+     * a failed build of A will result in A remaining out of date. When we try to build
+     * B, we should immediately bail instead of recomputing A's up-to-date status again.
+     *
+     * This also matters for performing fast (i.e. fake) downstream builds of projects
+     * when their upstream .d.ts files haven't changed content (but have newer timestamps)
      */
-    interface ParseConfigFileHost extends ParseConfigHost, ConfigFileDiagnosticsReporter {
-        getCurrentDirectory(): string;
+    interface BuildContext {
+        options: BuildOptions;
+        /**
+         * Map from output file name to its pre-build timestamp
+         */
+        unchangedOutputs: FileMap<Date>;
+        /**
+         * Map from config file name to up-to-date status
+         */
+        projectStatus: FileMap<UpToDateStatus>;
+        invalidatedProjects: FileMap<true>;
+        queuedProjects: FileMap<true>;
+        missingRoots: Map<true>;
     }
-    /**
-     * Reads the config file, reports errors if any and exits if the config file cannot be found
-     */
-    function getParsedCommandLineOfConfigFile(configFileName: string, optionsToExtend: CompilerOptions, host: ParseConfigFileHost): ParsedCommandLine | undefined;
-    /**
-     * Read tsconfig.json file
-     * @param fileName The path to the config file
-     */
-    function readConfigFile(fileName: string, readFile: (path: string) => string | undefined): {
-        config?: any;
-        error?: Diagnostic;
-    };
-    /**
-     * Parse the text of the tsconfig.json file
-     * @param fileName The path to the config file
-     * @param jsonText The text of the config file
-     */
-    function parseConfigFileTextToJson(fileName: string, jsonText: string): {
-        config?: any;
-        error?: Diagnostic;
-    };
-    /**
-     * Read tsconfig.json file
-     * @param fileName The path to the config file
-     */
-    function readJsonConfigFile(fileName: string, readFile: (path: string) => string | undefined): TsConfigSourceFile;
-    /**
-     * Convert the json syntax tree into the json value
-     */
-    function convertToObject(sourceFile: JsonSourceFile, errors: Push<Diagnostic>): any;
-    /**
-     * Parse the contents of a config file (tsconfig.json).
-     * @param json The contents of the config file to parse
-     * @param host Instance of ParseConfigHost used to enumerate files in folder.
-     * @param basePath A root directory to resolve relative path entries in the config
-     *    file to. e.g. outDir
-     */
-    function parseJsonConfigFileContent(json: any, host: ParseConfigHost, basePath: string, existingOptions?: CompilerOptions, configFileName?: string, resolutionStack?: Path[], extraFileExtensions?: ReadonlyArray<FileExtensionInfo>): ParsedCommandLine;
-    /**
-     * Parse the contents of a config file (tsconfig.json).
-     * @param jsonNode The contents of the config file to parse
-     * @param host Instance of ParseConfigHost used to enumerate files in folder.
-     * @param basePath A root directory to resolve relative path entries in the config
-     *    file to. e.g. outDir
-     */
-    function parseJsonSourceFileConfigFileContent(sourceFile: TsConfigSourceFile, host: ParseConfigHost, basePath: string, existingOptions?: CompilerOptions, configFileName?: string, resolutionStack?: Path[], extraFileExtensions?: ReadonlyArray<FileExtensionInfo>): ParsedCommandLine;
-    function convertCompilerOptionsFromJson(jsonOptions: any, basePath: string, configFileName?: string): {
-        options: CompilerOptions;
-        errors: Diagnostic[];
+    type Mapper = ReturnType<typeof createDependencyMapper>;
+    interface DependencyGraph {
+        buildQueue: ResolvedConfigFileName[];
+        dependencyMap: Mapper;
+    }
+    interface BuildOptions {
+        dry: boolean;
+        force: boolean;
+        verbose: boolean;
+    }
+    enum UpToDateStatusType {
+        Unbuildable = 0,
+        UpToDate = 1,
+        /**
+         * The project appears out of date because its upstream inputs are newer than its outputs,
+         * but all of its outputs are actually newer than the previous identical outputs of its (.d.ts) inputs.
+         * This means we can Pseudo-build (just touch timestamps), as if we had actually built this project.
+         */
+        UpToDateWithUpstreamTypes = 2,
+        OutputMissing = 3,
+        OutOfDateWithSelf = 4,
+        OutOfDateWithUpstream = 5,
+        UpstreamOutOfDate = 6,
+        UpstreamBlocked = 7,
+        /**
+         * Projects with no outputs (i.e. "solution" files)
+         */
+        ContainerOnly = 8
+    }
+    type UpToDateStatus = Status.Unbuildable | Status.UpToDate | Status.OutputMissing | Status.OutOfDateWithSelf | Status.OutOfDateWithUpstream | Status.UpstreamOutOfDate | Status.UpstreamBlocked | Status.ContainerOnly;
+    namespace Status {
+        /**
+         * The project can't be built at all in its current state. For example,
+         * its config file cannot be parsed, or it has a syntax error or missing file
+         */
+        interface Unbuildable {
+            type: UpToDateStatusType.Unbuildable;
+            reason: string;
+        }
+        /**
+         * This project doesn't have any outputs, so "is it up to date" is a meaningless question.
+         */
+        interface ContainerOnly {
+            type: UpToDateStatusType.ContainerOnly;
+        }
+        /**
+         * The project is up to date with respect to its inputs.
+         * We track what the newest input file is.
+         */
+        interface UpToDate {
+            type: UpToDateStatusType.UpToDate | UpToDateStatusType.UpToDateWithUpstreamTypes;
+            newestInputFileTime: Date;
+            newestInputFileName: string;
+            newestDeclarationFileContentChangedTime: Date;
+            newestOutputFileTime: Date;
+            newestOutputFileName: string;
+            oldestOutputFileName: string;
+        }
+        /**
+         * One or more of the outputs of the project does not exist.
+         */
+        interface OutputMissing {
+            type: UpToDateStatusType.OutputMissing;
+            /**
+             * The name of the first output file that didn't exist
+             */
+            missingOutputFileName: string;
+        }
+        /**
+         * One or more of the project's outputs is older than its newest input.
+         */
+        interface OutOfDateWithSelf {
+            type: UpToDateStatusType.OutOfDateWithSelf;
+            outOfDateOutputFileName: string;
+            newerInputFileName: string;
+        }
+        /**
+         * This project depends on an out-of-date project, so shouldn't be built yet
+         */
+        interface UpstreamOutOfDate {
+            type: UpToDateStatusType.UpstreamOutOfDate;
+            upstreamProjectName: string;
+        }
+        /**
+         * This project depends an upstream project with build errors
+         */
+        interface UpstreamBlocked {
+            type: UpToDateStatusType.UpstreamBlocked;
+            upstreamProjectName: string;
+        }
+        /**
+         * One or more of the project's outputs is older than the newest output of
+         * an upstream project.
+         */
+        interface OutOfDateWithUpstream {
+            type: UpToDateStatusType.OutOfDateWithUpstream;
+            outOfDateOutputFileName: string;
+            newerProjectName: string;
+        }
+    }
+    interface FileMap<T> {
+        setValue(fileName: string, value: T): void;
+        getValue(fileName: string): T | never;
+        getValueOrUndefined(fileName: string): T | undefined;
+        hasKey(fileName: string): boolean;
+        removeKey(fileName: string): void;
+        getKeys(): string[];
+    }
+    function createDependencyMapper(): {
+        addReference: (childConfigFileName: ResolvedConfigFileName, parentConfigFileName: ResolvedConfigFileName) => void;
+        getReferencesTo: (parentConfigFileName: ResolvedConfigFileName) => ResolvedConfigFileName[];
+        getReferencesOf: (childConfigFileName: ResolvedConfigFileName) => ResolvedConfigFileName[];
+        getKeys: () => ReadonlyArray<ResolvedConfigFileName>;
     };
-    function convertTypeAcquisitionFromJson(jsonOptions: any, basePath: string, configFileName?: string): {
-        options: TypeAcquisition;
-        errors: Diagnostic[];
+    function createBuildContext(options: BuildOptions): BuildContext;
+    function performBuild(args: string[], compilerHost: CompilerHost, buildHost: BuildHost, system?: System): number | undefined;
+    /**
+     * A SolutionBuilder has an immutable set of rootNames that are the "entry point" projects, but
+     * can dynamically add/remove other projects based on changes on the rootNames' references
+     */
+    function createSolutionBuilder(compilerHost: CompilerHost, buildHost: BuildHost, rootNames: ReadonlyArray<string>, defaultOptions: BuildOptions, system?: System): {
+        buildAllProjects: () => number;
+        getUpToDateStatus: (project: ParsedCommandLine | undefined) => UpToDateStatus;
+        getUpToDateStatusOfFile: (configFileName: ResolvedConfigFileName) => UpToDateStatus;
+        cleanAllProjects: () => ExitStatus.Success | ExitStatus.DiagnosticsPresent_OutputsSkipped;
+        resetBuildContext: (opts?: BuildOptions) => void;
+        getBuildGraph: (configFileNames: ReadonlyArray<string>) => DependencyGraph | undefined;
+        invalidateProject: (configFileName: string) => void;
+        buildInvalidatedProjects: () => void;
+        buildDependentInvalidatedProjects: () => void;
+        resolveProjectName: (name: string) => ResolvedConfigFileName | undefined;
+        startWatching: () => void;
     };
 }
-declare namespace ts {
-    interface Node {
-        getSourceFile(): SourceFile;
-        getChildCount(sourceFile?: SourceFile): number;
-        getChildAt(index: number, sourceFile?: SourceFile): Node;
-        getChildren(sourceFile?: SourceFile): Node[];
-        getStart(sourceFile?: SourceFile, includeJsDocComment?: boolean): number;
-        getFullStart(): number;
-        getEnd(): number;
-        getWidth(sourceFile?: SourceFileLike): number;
-        getFullWidth(): number;
-        getLeadingTriviaWidth(sourceFile?: SourceFile): number;
-        getFullText(sourceFile?: SourceFile): string;
-        getText(sourceFile?: SourceFile): string;
-        getFirstToken(sourceFile?: SourceFile): Node | undefined;
-        getLastToken(sourceFile?: SourceFile): Node | undefined;
-        forEachChild<T>(cbNode: (node: Node) => T | undefined, cbNodeArray?: (nodes: NodeArray<Node>) => T | undefined): T | undefined;
-    }
-    interface Identifier {
-        readonly text: string;
+//# sourceMappingURL=compiler.d.ts.map
+declare namespace ts.server {
+    const ActionSet: ActionSet;
+    const ActionInvalidate: ActionInvalidate;
+    const ActionPackageInstalled: ActionPackageInstalled;
+    const EventTypesRegistry: EventTypesRegistry;
+    const EventBeginInstallTypes: EventBeginInstallTypes;
+    const EventEndInstallTypes: EventEndInstallTypes;
+    const EventInitializationFailed: EventInitializationFailed;
+    namespace Arguments {
+        const GlobalCacheLocation = "--globalTypingsCacheLocation";
+        const LogFile = "--logFile";
+        const EnableTelemetry = "--enableTelemetry";
+        const TypingSafeListLocation = "--typingSafeListLocation";
+        const TypesMapLocation = "--typesMapLocation";
+        /**
+         * This argument specifies the location of the NPM executable.
+         * typingsInstaller will run the command with `${npmLocation} install ...`.
+         */
+        const NpmLocation = "--npmLocation";
     }
-    interface Symbol {
-        readonly name: string;
-        getFlags(): SymbolFlags;
-        getEscapedName(): __String;
-        getName(): string;
-        getDeclarations(): Declaration[] | undefined;
-        getDocumentationComment(typeChecker: TypeChecker | undefined): SymbolDisplayPart[];
-        getJsDocTags(): JSDocTagInfo[];
+    function hasArgument(argumentName: string): boolean;
+    function findArgument(argumentName: string): string | undefined;
+    function nowString(): string;
+}
+declare namespace ts.server {
+    type ActionSet = "action::set";
+    type ActionInvalidate = "action::invalidate";
+    type ActionPackageInstalled = "action::packageInstalled";
+    type EventTypesRegistry = "event::typesRegistry";
+    type EventBeginInstallTypes = "event::beginInstallTypes";
+    type EventEndInstallTypes = "event::endInstallTypes";
+    type EventInitializationFailed = "event::initializationFailed";
+    interface SortedReadonlyArray<T> extends ReadonlyArray<T> {
+        " __sortedArrayBrand": any;
     }
-    interface Type {
-        getFlags(): TypeFlags;
-        getSymbol(): Symbol | undefined;
-        getProperties(): Symbol[];
-        getProperty(propertyName: string): Symbol | undefined;
-        getApparentProperties(): Symbol[];
-        getCallSignatures(): Signature[];
-        getConstructSignatures(): Signature[];
-        getStringIndexType(): Type | undefined;
-        getNumberIndexType(): Type | undefined;
-        getBaseTypes(): BaseType[] | undefined;
-        getNonNullableType(): Type;
-        getConstraint(): Type | undefined;
-        getDefault(): Type | undefined;
-        isUnion(): this is UnionType;
-        isIntersection(): this is IntersectionType;
-        isUnionOrIntersection(): this is UnionOrIntersectionType;
-        isLiteral(): this is LiteralType;
-        isStringLiteral(): this is StringLiteralType;
-        isNumberLiteral(): this is NumberLiteralType;
-        isTypeParameter(): this is TypeParameter;
-        isClassOrInterface(): this is InterfaceType;
-        isClass(): this is InterfaceType;
+    interface TypingInstallerResponse {
+        readonly kind: ActionSet | ActionInvalidate | EventTypesRegistry | ActionPackageInstalled | EventBeginInstallTypes | EventEndInstallTypes | EventInitializationFailed;
     }
-    interface Signature {
-        getDeclaration(): SignatureDeclaration;
-        getTypeParameters(): TypeParameter[] | undefined;
-        getParameters(): Symbol[];
-        getReturnType(): Type;
-        getDocumentationComment(typeChecker: TypeChecker | undefined): SymbolDisplayPart[];
-        getJsDocTags(): JSDocTagInfo[];
+    interface TypingInstallerRequestWithProjectName {
+        readonly projectName: string;
     }
-    interface SourceFile {
-        getLineAndCharacterOfPosition(pos: number): LineAndCharacter;
-        getLineEndOfPosition(pos: number): number;
-        getLineStarts(): ReadonlyArray<number>;
+    type TypingInstallerRequestUnion = DiscoverTypings | CloseProject | TypesRegistryRequest | InstallPackageRequest;
+    interface DiscoverTypings extends TypingInstallerRequestWithProjectName {
+        readonly fileNames: string[];
+        readonly projectRootPath: Path;
+        readonly compilerOptions: CompilerOptions;
+        readonly typeAcquisition: TypeAcquisition;
+        readonly unresolvedImports: SortedReadonlyArray<string>;
+        readonly cachePath?: string;
+        readonly kind: "discover";
+    }
+    interface CloseProject extends TypingInstallerRequestWithProjectName {
+        readonly kind: "closeProject";
+    }
+    interface TypesRegistryRequest {
+        readonly kind: "typesRegistry";
+    }
+    interface InstallPackageRequest extends TypingInstallerRequestWithProjectName {
+        readonly kind: "installPackage";
+        readonly fileName: Path;
+        readonly packageName: string;
+        readonly projectRootPath: Path;
+    }
+    interface TypesRegistryResponse extends TypingInstallerResponse {
+        readonly kind: EventTypesRegistry;
+        readonly typesRegistry: MapLike<MapLike<string>>;
+    }
+    interface PackageInstalledResponse extends ProjectResponse {
+        readonly kind: ActionPackageInstalled;
+        readonly success: boolean;
+        readonly message: string;
+    }
+    interface InitializationFailedResponse extends TypingInstallerResponse {
+        readonly kind: EventInitializationFailed;
+        readonly message: string;
+    }
+    interface ProjectResponse extends TypingInstallerResponse {
+        readonly projectName: string;
+    }
+    interface InvalidateCachedTypings extends ProjectResponse {
+        readonly kind: ActionInvalidate;
+    }
+    interface InstallTypes extends ProjectResponse {
+        readonly kind: EventBeginInstallTypes | EventEndInstallTypes;
+        readonly eventId: number;
+        readonly typingsInstallerVersion: string;
+        readonly packagesToInstall: ReadonlyArray<string>;
+    }
+    interface BeginInstallTypes extends InstallTypes {
+        readonly kind: EventBeginInstallTypes;
+    }
+    interface EndInstallTypes extends InstallTypes {
+        readonly kind: EventEndInstallTypes;
+        readonly installSuccess: boolean;
+    }
+    interface InstallTypingHost extends JsTyping.TypingResolutionHost {
+        useCaseSensitiveFileNames: boolean;
+        writeFile(path: string, content: string): void;
+        createDirectory(path: string): void;
+        watchFile?(path: string, callback: FileWatcherCallback, pollingInterval?: number): FileWatcher;
+        watchDirectory?(path: string, callback: DirectoryWatcherCallback, recursive?: boolean): FileWatcher;
+    }
+    interface SetTypings extends ProjectResponse {
+        readonly typeAcquisition: TypeAcquisition;
+        readonly compilerOptions: CompilerOptions;
+        readonly typings: string[];
+        readonly unresolvedImports: SortedReadonlyArray<string>;
+        readonly kind: ActionSet;
+    }
+    type TypingInstallerResponseUnion = SetTypings | InvalidateCachedTypings | TypesRegistryResponse | PackageInstalledResponse | InstallTypes | InitializationFailedResponse;
+}
+declare namespace ts.JsTyping {
+    interface TypingResolutionHost {
+        directoryExists(path: string): boolean;
+        fileExists(fileName: string): boolean;
+        readFile(path: string, encoding?: string): string | undefined;
+        readDirectory(rootDir: string, extensions: ReadonlyArray<string>, excludes: ReadonlyArray<string> | undefined, includes: ReadonlyArray<string> | undefined, depth?: number): string[];
+    }
+    interface CachedTyping {
+        typingLocation: string;
+        version: Semver;
+    }
+    function isTypingUpToDate(cachedTyping: CachedTyping, availableTypingVersions: MapLike<string>): boolean;
+    const nodeCoreModuleList: ReadonlyArray<string>;
+    const nodeCoreModules: Map<true>;
+    /**
+     * A map of loose file names to library names that we are confident require typings
+     */
+    type SafeList = ReadonlyMap<string>;
+    function loadSafeList(host: TypingResolutionHost, safeListPath: Path): SafeList;
+    function loadTypesMap(host: TypingResolutionHost, typesMapPath: Path): SafeList | undefined;
+    /**
+     * @param host is the object providing I/O related operations.
+     * @param fileNames are the file names that belong to the same project
+     * @param projectRootPath is the path to the project root directory
+     * @param safeListPath is the path used to retrieve the safe list
+     * @param packageNameToTypingLocation is the map of package names to their cached typing locations and installed versions
+     * @param typeAcquisition is used to customize the typing acquisition process
+     * @param compilerOptions are used as a source for typing inference
+     */
+    function discoverTypings(host: TypingResolutionHost, log: ((message: string) => void) | undefined, fileNames: string[], projectRootPath: Path, safeList: SafeList, packageNameToTypingLocation: ReadonlyMap<CachedTyping>, typeAcquisition: TypeAcquisition, unresolvedImports: ReadonlyArray<string>, typesRegistry: ReadonlyMap<MapLike<string>>): {
+        cachedTypingPaths: string[];
+        newTypingNames: string[];
+        filesToWatch: string[];
+    };
+    enum PackageNameValidationResult {
+        Ok = 0,
+        ScopedPackagesNotSupported = 1,
+        EmptyName = 2,
+        NameTooLong = 3,
+        NameStartsWithDot = 4,
+        NameStartsWithUnderscore = 5,
+        NameContainsNonURISafeCharacters = 6
+    }
+    /**
+     * Validates package name using rules defined at https://docs.npmjs.com/files/package.json
+     */
+    function validatePackageName(packageName: string): PackageNameValidationResult;
+    function renderPackageNameValidationFailure(result: PackageNameValidationResult, typing: string): string;
+}
+declare namespace ts {
+    class Semver {
+        readonly major: number;
+        readonly minor: number;
+        readonly patch: number;
+        /**
+         * If true, this is `major.minor.0-next.patch`.
+         * If false, this is `major.minor.patch`.
+         */
+        readonly isPrerelease: boolean;
+        static parse(semver: string): Semver;
+        static fromRaw({ major, minor, patch, isPrerelease }: Semver): Semver;
+        private static tryParse;
+        private constructor();
+        readonly versionString: string;
+        equals(sem: Semver): boolean;
+        greaterThan(sem: Semver): boolean;
+    }
+}
+//# sourceMappingURL=jsTyping.d.ts.map
+declare namespace ts {
+    interface Node {
+        getSourceFile(): SourceFile;
+        getChildCount(sourceFile?: SourceFile): number;
+        getChildAt(index: number, sourceFile?: SourceFile): Node;
+        getChildren(sourceFile?: SourceFile): Node[];
+        getChildren(sourceFile?: SourceFileLike): Node[];
+        getStart(sourceFile?: SourceFile, includeJsDocComment?: boolean): number;
+        getStart(sourceFile?: SourceFileLike, includeJsDocComment?: boolean): number;
+        getFullStart(): number;
+        getEnd(): number;
+        getWidth(sourceFile?: SourceFileLike): number;
+        getFullWidth(): number;
+        getLeadingTriviaWidth(sourceFile?: SourceFile): number;
+        getFullText(sourceFile?: SourceFile): string;
+        getText(sourceFile?: SourceFile): string;
+        getFirstToken(sourceFile?: SourceFile): Node | undefined;
+        getLastToken(sourceFile?: SourceFile): Node | undefined;
+        forEachChild<T>(cbNode: (node: Node) => T | undefined, cbNodeArray?: (nodes: NodeArray<Node>) => T | undefined): T | undefined;
+    }
+    interface Identifier {
+        readonly text: string;
+    }
+    interface Symbol {
+        readonly name: string;
+        getFlags(): SymbolFlags;
+        getEscapedName(): __String;
+        getName(): string;
+        getDeclarations(): Declaration[] | undefined;
+        getDocumentationComment(typeChecker: TypeChecker | undefined): SymbolDisplayPart[];
+        getJsDocTags(): JSDocTagInfo[];
+    }
+    interface Type {
+        getFlags(): TypeFlags;
+        getSymbol(): Symbol | undefined;
+        getProperties(): Symbol[];
+        getProperty(propertyName: string): Symbol | undefined;
+        getApparentProperties(): Symbol[];
+        getCallSignatures(): Signature[];
+        getConstructSignatures(): Signature[];
+        getStringIndexType(): Type | undefined;
+        getNumberIndexType(): Type | undefined;
+        getBaseTypes(): BaseType[] | undefined;
+        getNonNullableType(): Type;
+        getConstraint(): Type | undefined;
+        getDefault(): Type | undefined;
+        isUnion(): this is UnionType;
+        isIntersection(): this is IntersectionType;
+        isUnionOrIntersection(): this is UnionOrIntersectionType;
+        isLiteral(): this is LiteralType;
+        isStringLiteral(): this is StringLiteralType;
+        isNumberLiteral(): this is NumberLiteralType;
+        isTypeParameter(): this is TypeParameter;
+        isClassOrInterface(): this is InterfaceType;
+        isClass(): this is InterfaceType;
+    }
+    interface Signature {
+        getDeclaration(): SignatureDeclaration;
+        getTypeParameters(): TypeParameter[] | undefined;
+        getParameters(): Symbol[];
+        getReturnType(): Type;
+        getDocumentationComment(typeChecker: TypeChecker | undefined): SymbolDisplayPart[];
+        getJsDocTags(): JSDocTagInfo[];
+    }
+    interface SourceFile {
+        version: string;
+        scriptSnapshot: IScriptSnapshot | undefined;
+        nameTable: UnderscoreEscapedMap<number> | undefined;
+        getNamedDeclarations(): Map<Declaration[]>;
+        getLineAndCharacterOfPosition(pos: number): LineAndCharacter;
+        getLineEndOfPosition(pos: number): number;
+        getLineStarts(): ReadonlyArray<number>;
         getPositionOfLineAndCharacter(line: number, character: number): number;
         update(newText: string, textChangeRange: TextChangeRange): SourceFile;
+        sourceMapper?: sourcemaps.SourceMapper;
     }
     interface SourceFileLike {
         getLineAndCharacterOfPosition(pos: number): LineAndCharacter;
+        sourceMapper?: sourcemaps.SourceMapper;
     }
     interface SourceMapSource {
         getLineAndCharacterOfPosition(pos: number): LineAndCharacter;
@@ -4522,6 +9849,8 @@ declare namespace ts {
         resolveModuleNames?(moduleNames: string[], containingFile: string, reusedNames?: string[]): ResolvedModule[];
         getResolvedModuleWithFailedLookupLocationsFromCache?(modulename: string, containingFile: string): ResolvedModuleWithFailedLookupLocations | undefined;
         resolveTypeReferenceDirectives?(typeDirectiveNames: string[], containingFile: string): ResolvedTypeReferenceDirective[];
+        hasInvalidatedResolution?: HasInvalidatedResolution;
+        hasChangedAutomaticTypeDirectiveNames?: boolean;
         getDirectories?(directoryName: string): string[];
         /**
          * Gets a set of custom transformers to use during emit.
@@ -4538,6 +9867,7 @@ declare namespace ts {
         readonly importModuleSpecifierPreference?: "relative" | "non-relative";
         readonly allowTextChangesInNewFiles?: boolean;
     }
+    const defaultPreferences: UserPreferences;
     interface LanguageService {
         cleanupSemanticCache(): void;
         getSyntacticDiagnostics(fileName: string): DiagnosticWithLocation[];
@@ -4609,6 +9939,7 @@ declare namespace ts {
         getEditsForFileRename(oldFilePath: string, newFilePath: string, formatOptions: FormatCodeSettings, preferences: UserPreferences | undefined): ReadonlyArray<FileTextChanges>;
         getEmitOutput(fileName: string, emitOnlyDtsFiles?: boolean): EmitOutput;
         getProgram(): Program | undefined;
+        getNonBoundSourceFile(fileName: string): SourceFile;
         dispose(): void;
     }
     interface JsxClosingTagInfo {
@@ -4719,6 +10050,9 @@ declare namespace ts {
     }
     type CodeActionCommand = InstallPackageAction;
     interface InstallPackageAction {
+        file: string;
+        type: "install package";
+        packageName: string;
     }
     /**
      * A set of one or more available refactoring actions, grouped under a parent refactoring.
@@ -5230,8 +10564,263 @@ declare namespace ts {
         jsxAttributeStringLiteralValue = 24
     }
 }
+interface PromiseConstructor {
+    new <T>(executor: (resolve: (value?: T | PromiseLike<T>) => void, reject: (reason?: any) => void) => void): Promise<T>;
+    reject(reason: any): Promise<never>;
+    all<T>(values: (T | PromiseLike<T>)[]): Promise<T[]>;
+}
+declare var Promise: PromiseConstructor;
+declare namespace ts {
+    const scanner: Scanner;
+    enum SemanticMeaning {
+        None = 0,
+        Value = 1,
+        Type = 2,
+        Namespace = 4,
+        All = 7
+    }
+    function getMeaningFromDeclaration(node: Node): SemanticMeaning;
+    function getMeaningFromLocation(node: Node): SemanticMeaning;
+    function isInRightSideOfInternalImportEqualsDeclaration(node: Node): boolean;
+    function isCallExpressionTarget(node: Node): boolean;
+    function isNewExpressionTarget(node: Node): boolean;
+    function climbPastPropertyAccess(node: Node): Node;
+    function getTargetLabel(referenceNode: Node, labelName: string): Identifier | undefined;
+    function isJumpStatementTarget(node: Node): node is Identifier & {
+        parent: BreakOrContinueStatement;
+    };
+    function isLabelOfLabeledStatement(node: Node): node is Identifier;
+    function isLabelName(node: Node): boolean;
+    function isRightSideOfQualifiedName(node: Node): boolean;
+    function isRightSideOfPropertyAccess(node: Node): boolean;
+    function isNameOfModuleDeclaration(node: Node): boolean;
+    function isNameOfFunctionDeclaration(node: Node): boolean;
+    function isLiteralNameOfPropertyDeclarationOrIndexAccess(node: StringLiteral | NumericLiteral): boolean;
+    function isExpressionOfExternalModuleImportEqualsDeclaration(node: Node): boolean;
+    function getContainerNode(node: Node): Declaration | undefined;
+    function getNodeKind(node: Node): ScriptElementKind;
+    function isThis(node: Node): boolean;
+    interface ListItemInfo {
+        listItemIndex: number;
+        list: Node;
+    }
+    function getLineStartPositionForPosition(position: number, sourceFile: SourceFileLike): number;
+    function rangeContainsRange(r1: TextRange, r2: TextRange): boolean;
+    function rangeContainsPosition(r: TextRange, pos: number): boolean;
+    function rangeContainsPositionExclusive(r: TextRange, pos: number): boolean;
+    function startEndContainsRange(start: number, end: number, range: TextRange): boolean;
+    function rangeContainsStartEnd(range: TextRange, start: number, end: number): boolean;
+    function rangeOverlapsWithStartEnd(r1: TextRange, start: number, end: number): boolean;
+    function startEndOverlapsWithStartEnd(start1: number, end1: number, start2: number, end2: number): boolean;
+    /**
+     * Assumes `candidate.start <= position` holds.
+     */
+    function positionBelongsToNode(candidate: Node, position: number, sourceFile: SourceFile): boolean;
+    function findListItemInfo(node: Node): ListItemInfo | undefined;
+    function hasChildOfKind(n: Node, kind: SyntaxKind, sourceFile: SourceFile): boolean;
+    function findChildOfKind<T extends Node>(n: Node, kind: T["kind"], sourceFile: SourceFileLike): T | undefined;
+    function findContainingList(node: Node): SyntaxList | undefined;
+    /**
+     * Gets the token whose text has range [start, end) and
+     * position >= start and (position < end or (position === end && token is literal or keyword or identifier))
+     */
+    function getTouchingPropertyName(sourceFile: SourceFile, position: number): Node;
+    /**
+     * Returns the token if position is in [start, end).
+     * If position === end, returns the preceding token if includeItemAtEndPosition(previousToken) === true
+     */
+    function getTouchingToken(sourceFile: SourceFile, position: number, includeJsDocComment: boolean, includePrecedingTokenAtEndPosition?: (n: Node) => boolean): Node;
+    /** Returns a token if position is in [start-of-leading-trivia, end) */
+    function getTokenAtPosition(sourceFile: SourceFile, position: number, includeJsDocComment: boolean, includeEndPosition?: boolean): Node;
+    /**
+     * The token on the left of the position is the token that strictly includes the position
+     * or sits to the left of the cursor if it is on a boundary. For example
+     *
+     *   fo|o               -> will return foo
+     *   foo <comment> |bar -> will return foo
+     *
+     */
+    function findTokenOnLeftOfPosition(file: SourceFile, position: number): Node | undefined;
+    function findNextToken(previousToken: Node, parent: Node, sourceFile: SourceFile): Node | undefined;
+    /**
+     * Finds the rightmost token satisfying `token.end <= position`,
+     * excluding `JsxText` tokens containing only whitespace.
+     */
+    function findPrecedingToken(position: number, sourceFile: SourceFile, startNode?: Node, includeJsDoc?: boolean): Node | undefined;
+    function isInString(sourceFile: SourceFile, position: number, previousToken?: Node | undefined): boolean;
+    /**
+     * returns true if the position is in between the open and close elements of an JSX expression.
+     */
+    function isInsideJsxElementOrAttribute(sourceFile: SourceFile, position: number): boolean;
+    function isInTemplateString(sourceFile: SourceFile, position: number): boolean;
+    function findPrecedingMatchingToken(token: Node, matchingTokenKind: SyntaxKind, sourceFile: SourceFile): Node | undefined;
+    interface PossibleTypeArgumentInfo {
+        readonly called: Identifier;
+        readonly nTypeArguments: number;
+    }
+    function isPossiblyTypeArgumentPosition(tokenIn: Node, sourceFile: SourceFile): PossibleTypeArgumentInfo | undefined;
+    /**
+     * Returns true if the cursor at position in sourceFile is within a comment.
+     *
+     * @param tokenAtPosition Must equal `getTokenAtPosition(sourceFile, position)
+     * @param predicate Additional predicate to test on the comment range.
+     */
+    function isInComment(sourceFile: SourceFile, position: number, tokenAtPosition?: Node, predicate?: (c: CommentRange) => boolean): boolean;
+    function hasDocComment(sourceFile: SourceFile, position: number): boolean | undefined;
+    function getNodeModifiers(node: Node): string;
+    function getTypeArgumentOrTypeParameterList(node: Node): NodeArray<Node> | undefined;
+    function isComment(kind: SyntaxKind): boolean;
+    function isStringOrRegularExpressionOrTemplateLiteral(kind: SyntaxKind): boolean;
+    function isPunctuation(kind: SyntaxKind): boolean;
+    function isInsideTemplateLiteral(node: TemplateLiteralToken, position: number, sourceFile: SourceFile): boolean;
+    function isAccessibilityModifier(kind: SyntaxKind): boolean;
+    function cloneCompilerOptions(options: CompilerOptions): CompilerOptions;
+    function isArrayLiteralOrObjectLiteralDestructuringPattern(node: Node): boolean;
+    function isInReferenceComment(sourceFile: SourceFile, position: number): boolean;
+    function isInNonReferenceComment(sourceFile: SourceFile, position: number): boolean;
+    function createTextSpanFromNode(node: Node, sourceFile?: SourceFile): TextSpan;
+    function createTextSpanFromRange(range: TextRange): TextSpan;
+    function createTextRangeFromSpan(span: TextSpan): TextRange;
+    function createTextChangeFromStartLength(start: number, length: number, newText: string): TextChange;
+    function createTextChange(span: TextSpan, newText: string): TextChange;
+    const typeKeywords: ReadonlyArray<SyntaxKind>;
+    function isTypeKeyword(kind: SyntaxKind): boolean;
+    /** True if the symbol is for an external module, as opposed to a namespace. */
+    function isExternalModuleSymbol(moduleSymbol: Symbol): boolean;
+    /** Returns `true` the first time it encounters a node and `false` afterwards. */
+    type NodeSeenTracker<T = Node> = (node: T) => boolean;
+    function nodeSeenTracker<T extends Node>(): NodeSeenTracker<T>;
+    function getSnapshotText(snap: IScriptSnapshot): string;
+    function repeatString(str: string, count: number): string;
+    function skipConstraint(type: Type): Type;
+    function getNameFromPropertyName(name: PropertyName): string | undefined;
+    function programContainsEs6Modules(program: Program): boolean;
+    function compilerOptionsIndicateEs6Modules(compilerOptions: CompilerOptions): boolean;
+    function hostUsesCaseSensitiveFileNames(host: LanguageServiceHost): boolean;
+    function hostGetCanonicalFileName(host: LanguageServiceHost): GetCanonicalFileName;
+    function makeImportIfNecessary(defaultImport: Identifier | undefined, namedImports: ReadonlyArray<ImportSpecifier> | undefined, moduleSpecifier: string, quotePreference: QuotePreference): ImportDeclaration | undefined;
+    function makeImport(defaultImport: Identifier | undefined, namedImports: ReadonlyArray<ImportSpecifier> | undefined, moduleSpecifier: string | Expression, quotePreference: QuotePreference): ImportDeclaration;
+    function makeStringLiteral(text: string, quotePreference: QuotePreference): StringLiteral;
+    enum QuotePreference {
+        Single = 0,
+        Double = 1
+    }
+    function getQuotePreference(sourceFile: SourceFile, preferences: UserPreferences): QuotePreference;
+    function symbolNameNoDefault(symbol: Symbol): string | undefined;
+    function symbolEscapedNameNoDefault(symbol: Symbol): __String | undefined;
+    function getPropertySymbolFromBindingElement(checker: TypeChecker, bindingElement: BindingElement & {
+        name: Identifier;
+    }): Symbol | undefined;
+    /**
+     * Find symbol of the given property-name and add the symbol to the given result array
+     * @param symbol a symbol to start searching for the given propertyName
+     * @param propertyName a name of property to search for
+     * @param result an array of symbol of found property symbols
+     * @param previousIterationSymbolsCache a cache of symbol from previous iterations of calling this function to prevent infinite revisiting of the same symbol.
+     *                                The value of previousIterationSymbol is undefined when the function is first called.
+     */
+    function getPropertySymbolsFromBaseTypes<T>(symbol: Symbol, propertyName: string, checker: TypeChecker, cb: (symbol: Symbol) => T | undefined): T | undefined;
+    function isMemberSymbolInBaseType(memberSymbol: Symbol, checker: TypeChecker): boolean;
+    class NodeSet {
+        private map;
+        add(node: Node): void;
+        has(node: Node): boolean;
+        forEach(cb: (node: Node) => void): void;
+        some(pred: (node: Node) => boolean): boolean;
+    }
+    function getParentNodeInSpan(node: Node | undefined, file: SourceFile, span: TextSpan): Node | undefined;
+}
+declare namespace ts {
+    function isFirstDeclarationOfSymbolParameter(symbol: Symbol): boolean;
+    function symbolPart(text: string, symbol: Symbol): SymbolDisplayPart;
+    function displayPart(text: string, kind: SymbolDisplayPartKind): SymbolDisplayPart;
+    function spacePart(): SymbolDisplayPart;
+    function keywordPart(kind: SyntaxKind): SymbolDisplayPart;
+    function punctuationPart(kind: SyntaxKind): SymbolDisplayPart;
+    function operatorPart(kind: SyntaxKind): SymbolDisplayPart;
+    function textOrKeywordPart(text: string): SymbolDisplayPart;
+    function textPart(text: string): SymbolDisplayPart;
+    /**
+     * The default is CRLF.
+     */
+    function getNewLineOrDefaultFromHost(host: LanguageServiceHost | LanguageServiceShimHost, formatSettings?: FormatCodeSettings): string;
+    function lineBreakPart(): SymbolDisplayPart;
+    function mapToDisplayParts(writeDisplayParts: (writer: DisplayPartsSymbolWriter) => void): SymbolDisplayPart[];
+    function typeToDisplayParts(typechecker: TypeChecker, type: Type, enclosingDeclaration?: Node, flags?: TypeFormatFlags): SymbolDisplayPart[];
+    function symbolToDisplayParts(typeChecker: TypeChecker, symbol: Symbol, enclosingDeclaration?: Node, meaning?: SymbolFlags, flags?: SymbolFormatFlags): SymbolDisplayPart[];
+    function signatureToDisplayParts(typechecker: TypeChecker, signature: Signature, enclosingDeclaration?: Node, flags?: TypeFormatFlags): SymbolDisplayPart[];
+    function isImportOrExportSpecifierName(location: Node): location is Identifier;
+    /**
+     * Strip off existed single quotes or double quotes from a given string
+     *
+     * @return non-quoted string
+     */
+    function stripQuotes(name: string): string;
+    function startsWithQuote(name: string): boolean;
+    function scriptKindIs(fileName: string, host: LanguageServiceHost, ...scriptKinds: ScriptKind[]): boolean;
+    function getScriptKind(fileName: string, host?: LanguageServiceHost): ScriptKind;
+    function getUniqueSymbolId(symbol: Symbol, checker: TypeChecker): number;
+    function getFirstNonSpaceCharacterPosition(text: string, position: number): number;
+    /**
+     * Creates a deep, memberwise clone of a node with no source map location.
+     *
+     * WARNING: This is an expensive operation and is only intended to be used in refactorings
+     * and code fixes (because those are triggered by explicit user actions).
+     */
+    function getSynthesizedDeepClone<T extends Node | undefined>(node: T, includeTrivia?: boolean): T;
+    function getSynthesizedDeepClones<T extends Node>(nodes: NodeArray<T>, includeTrivia?: boolean): NodeArray<T>;
+    function getSynthesizedDeepClones<T extends Node>(nodes: NodeArray<T> | undefined, includeTrivia?: boolean): NodeArray<T> | undefined;
+    /**
+     * Sets EmitFlags to suppress leading and trailing trivia on the node.
+     */
+    function suppressLeadingAndTrailingTrivia(node: Node): void;
+    /**
+     * Sets EmitFlags to suppress leading trivia on the node.
+     */
+    function suppressLeadingTrivia(node: Node): void;
+    /**
+     * Sets EmitFlags to suppress trailing trivia on the node.
+     */
+    function suppressTrailingTrivia(node: Node): void;
+    function getUniqueName(baseName: string, sourceFile: SourceFile): string;
+    /**
+     * @return The index of the (only) reference to the extracted symbol.  We want the cursor
+     * to be on the reference, rather than the declaration, because it's closer to where the
+     * user was before extracting it.
+     */
+    function getRenameLocation(edits: ReadonlyArray<FileTextChanges>, renameFilename: string, name: string, preferLastLocation: boolean): number;
+    function copyComments(sourceNode: Node, targetNode: Node, sourceFile: SourceFile, commentKind?: CommentKind, hasTrailingNewLine?: boolean): void;
+}
 declare namespace ts {
     function createClassifier(): Classifier;
+    function getSemanticClassifications(typeChecker: TypeChecker, cancellationToken: CancellationToken, sourceFile: SourceFile, classifiableNames: UnderscoreEscapedMap<true>, span: TextSpan): ClassifiedSpan[];
+    function getEncodedSemanticClassifications(typeChecker: TypeChecker, cancellationToken: CancellationToken, sourceFile: SourceFile, classifiableNames: UnderscoreEscapedMap<true>, span: TextSpan): Classifications;
+    function getSyntacticClassifications(cancellationToken: CancellationToken, sourceFile: SourceFile, span: TextSpan): ClassifiedSpan[];
+    function getEncodedSyntacticClassifications(cancellationToken: CancellationToken, sourceFile: SourceFile, span: TextSpan): Classifications;
+}
+declare namespace ts.Completions.PathCompletions {
+    interface NameAndKind {
+        readonly name: string;
+        readonly kind: ScriptElementKind.scriptElement | ScriptElementKind.directory | ScriptElementKind.externalModuleName;
+    }
+    interface PathCompletion extends NameAndKind {
+        readonly span: TextSpan | undefined;
+    }
+    function getStringLiteralCompletionsFromModuleNames(sourceFile: SourceFile, node: LiteralExpression, compilerOptions: CompilerOptions, host: LanguageServiceHost, typeChecker: TypeChecker): ReadonlyArray<PathCompletion>;
+    function getTripleSlashReferenceCompletion(sourceFile: SourceFile, position: number, compilerOptions: CompilerOptions, host: LanguageServiceHost): ReadonlyArray<PathCompletion> | undefined;
+}
+declare namespace ts.Completions {
+    type Log = (message: string) => void;
+    function getCompletionsAtPosition(host: LanguageServiceHost, program: Program, log: Log, sourceFile: SourceFile, position: number, preferences: UserPreferences, triggerCharacter: CompletionsTriggerCharacter | undefined): CompletionInfo | undefined;
+    interface CompletionEntryIdentifier {
+        name: string;
+        source?: string;
+    }
+    function getCompletionEntryDetails(program: Program, log: Log, sourceFile: SourceFile, position: number, entryId: CompletionEntryIdentifier, host: LanguageServiceHost, formatContext: formatting.FormatContext, getCanonicalFileName: GetCanonicalFileName, preferences: UserPreferences, cancellationToken: CancellationToken): CompletionEntryDetails | undefined;
+    function getCompletionEntrySymbol(program: Program, log: Log, sourceFile: SourceFile, position: number, entryId: CompletionEntryIdentifier): Symbol | undefined;
+}
+declare namespace ts.DocumentHighlights {
+    function getDocumentHighlights(program: Program, cancellationToken: CancellationToken, sourceFile: SourceFile, position: number, sourceFilesToSearch: ReadonlyArray<SourceFile>): DocumentHighlights[] | undefined;
 }
 declare namespace ts {
     /**
@@ -5292,60 +10881,1149 @@ declare namespace ts {
          */
         releaseDocument(fileName: string, compilationSettings: CompilerOptions): void;
         releaseDocumentWithKey(path: Path, key: DocumentRegistryBucketKey): void;
+        getLanguageServiceRefCounts(path: Path): [string, number | undefined][];
         reportStats(): string;
     }
-    type DocumentRegistryBucketKey = string & {
-        __bucketKey: any;
-    };
-    function createDocumentRegistry(useCaseSensitiveFileNames?: boolean, currentDirectory?: string): DocumentRegistry;
-}
-declare namespace ts {
-    function preProcessFile(sourceText: string, readImportFiles?: boolean, detectJavaScriptImports?: boolean): PreProcessedFileInfo;
-}
-declare namespace ts {
-    interface TranspileOptions {
-        compilerOptions?: CompilerOptions;
-        fileName?: string;
-        reportDiagnostics?: boolean;
-        moduleName?: string;
-        renamedDependencies?: MapLike<string>;
-        transformers?: CustomTransformers;
+    interface ExternalDocumentCache {
+        setDocument(key: DocumentRegistryBucketKey, path: Path, sourceFile: SourceFile): void;
+        getDocument(key: DocumentRegistryBucketKey, path: Path): SourceFile | undefined;
+    }
+    type DocumentRegistryBucketKey = string & {
+        __bucketKey: any;
+    };
+    function createDocumentRegistry(useCaseSensitiveFileNames?: boolean, currentDirectory?: string): DocumentRegistry;
+    function createDocumentRegistryInternal(useCaseSensitiveFileNames?: boolean, currentDirectory?: string, externalCache?: ExternalDocumentCache): DocumentRegistry;
+}
+declare namespace ts.FindAllReferences {
+    interface ImportsResult {
+        /** For every import of the symbol, the location and local symbol for the import. */
+        importSearches: ReadonlyArray<[Identifier, Symbol]>;
+        /** For rename imports/exports `{ foo as bar }`, `foo` is not a local, so it may be added as a reference immediately without further searching. */
+        singleReferences: ReadonlyArray<Identifier | StringLiteral>;
+        /** List of source files that may (or may not) use the symbol via a namespace. (For UMD modules this is every file.) */
+        indirectUsers: ReadonlyArray<SourceFile>;
+    }
+    type ImportTracker = (exportSymbol: Symbol, exportInfo: ExportInfo, isForRename: boolean) => ImportsResult;
+    /** Creates the imports map and returns an ImportTracker that uses it. Call this lazily to avoid calling `getDirectImportsMap` unnecessarily.  */
+    function createImportTracker(sourceFiles: ReadonlyArray<SourceFile>, sourceFilesSet: ReadonlyMap<true>, checker: TypeChecker, cancellationToken: CancellationToken): ImportTracker;
+    /** Info about an exported symbol to perform recursive search on. */
+    interface ExportInfo {
+        exportingModuleSymbol: Symbol;
+        exportKind: ExportKind;
+    }
+    enum ExportKind {
+        Named = 0,
+        Default = 1,
+        ExportEquals = 2
+    }
+    enum ImportExport {
+        Import = 0,
+        Export = 1
+    }
+    type ModuleReference = {
+        kind: "import";
+        literal: StringLiteralLike;
+    }
+    /** <reference path> or <reference types> */
+     | {
+        kind: "reference";
+        referencingFile: SourceFile;
+        ref: FileReference;
+    };
+    function findModuleReferences(program: Program, sourceFiles: ReadonlyArray<SourceFile>, searchModuleSymbol: Symbol): ModuleReference[];
+    interface ImportedSymbol {
+        kind: ImportExport.Import;
+        symbol: Symbol;
+        isNamedImport: boolean;
+    }
+    interface ExportedSymbol {
+        kind: ImportExport.Export;
+        symbol: Symbol;
+        exportInfo: ExportInfo;
+    }
+    /**
+     * Given a local reference, we might notice that it's an import/export and recursively search for references of that.
+     * If at an import, look locally for the symbol it imports.
+     * If an an export, look for all imports of it.
+     * This doesn't handle export specifiers; that is done in `getReferencesAtExportSpecifier`.
+     * @param comingFromExport If we are doing a search for all exports, don't bother looking backwards for the imported symbol, since that's the reason we're here.
+     */
+    function getImportOrExportSymbol(node: Node, symbol: Symbol, checker: TypeChecker, comingFromExport: boolean): ImportedSymbol | ExportedSymbol | undefined;
+    function getExportInfo(exportSymbol: Symbol, exportKind: ExportKind, checker: TypeChecker): ExportInfo | undefined;
+}
+declare namespace ts.FindAllReferences {
+    interface SymbolAndEntries {
+        definition: Definition | undefined;
+        references: Entry[];
+    }
+    type Definition = {
+        type: "symbol";
+        symbol: Symbol;
+    } | {
+        type: "label";
+        node: Identifier;
+    } | {
+        type: "keyword";
+        node: Node;
+    } | {
+        type: "this";
+        node: Node;
+    } | {
+        type: "string";
+        node: StringLiteral;
+    };
+    type Entry = NodeEntry | SpanEntry;
+    interface NodeEntry {
+        type: "node";
+        node: Node;
+        isInString?: true;
+    }
+    interface SpanEntry {
+        type: "span";
+        fileName: string;
+        textSpan: TextSpan;
+    }
+    function nodeEntry(node: Node, isInString?: true): NodeEntry;
+    interface Options {
+        readonly findInStrings?: boolean;
+        readonly findInComments?: boolean;
+        /**
+         * True if we are renaming the symbol.
+         * If so, we will find fewer references -- if it is referenced by several different names, we sill only find references for the original name.
+         */
+        readonly isForRename?: boolean;
+        /** True if we are searching for implementations. We will have a different method of adding references if so. */
+        readonly implementations?: boolean;
+    }
+    function findReferencedSymbols(program: Program, cancellationToken: CancellationToken, sourceFiles: ReadonlyArray<SourceFile>, sourceFile: SourceFile, position: number): ReferencedSymbol[] | undefined;
+    function getImplementationsAtPosition(program: Program, cancellationToken: CancellationToken, sourceFiles: ReadonlyArray<SourceFile>, sourceFile: SourceFile, position: number): ImplementationLocation[] | undefined;
+    function findReferencedEntries(program: Program, cancellationToken: CancellationToken, sourceFiles: ReadonlyArray<SourceFile>, sourceFile: SourceFile, position: number, options?: Options): ReferenceEntry[] | undefined;
+    function getReferenceEntriesForNode(position: number, node: Node, program: Program, sourceFiles: ReadonlyArray<SourceFile>, cancellationToken: CancellationToken, options?: Options, sourceFilesSet?: ReadonlyMap<true>): Entry[] | undefined;
+    function toHighlightSpan(entry: Entry): {
+        fileName: string;
+        span: HighlightSpan;
+    };
+}
+/** Encapsulates the core find-all-references algorithm. */
+declare namespace ts.FindAllReferences.Core {
+    /** Core find-all-references algorithm. Handles special cases before delegating to `getReferencedSymbolsForSymbol`. */
+    function getReferencedSymbolsForNode(position: number, node: Node, program: Program, sourceFiles: ReadonlyArray<SourceFile>, cancellationToken: CancellationToken, options?: Options, sourceFilesSet?: ReadonlyMap<true>): SymbolAndEntries[] | undefined;
+    /** Used as a quick check for whether a symbol is used at all in a file (besides its definition). */
+    function isSymbolReferencedInFile(definition: Identifier, checker: TypeChecker, sourceFile: SourceFile): boolean;
+    function eachSymbolReferenceInFile<T>(definition: Identifier, checker: TypeChecker, sourceFile: SourceFile, cb: (token: Identifier) => T): T | undefined;
+    /**
+     * Given an initial searchMeaning, extracted from a location, widen the search scope based on the declarations
+     * of the corresponding symbol. e.g. if we are searching for "Foo" in value position, but "Foo" references a class
+     * then we need to widen the search to include type positions as well.
+     * On the contrary, if we are searching for "Bar" in type position and we trace bar to an interface, and an uninstantiated
+     * module, we want to keep the search limited to only types, as the two declarations (interface and uninstantiated module)
+     * do not intersect in any of the three spaces.
+     */
+    function getIntersectingMeaningFromDeclarations(node: Node, symbol: Symbol): SemanticMeaning;
+    function getReferenceEntriesForShorthandPropertyAssignment(node: Node, checker: TypeChecker, addReference: (node: Node) => void): void;
+}
+declare namespace ts {
+    function getEditsForFileRename(program: Program, oldFileOrDirPath: string, newFileOrDirPath: string, host: LanguageServiceHost, formatContext: formatting.FormatContext, preferences: UserPreferences): ReadonlyArray<FileTextChanges>;
+}
+declare namespace ts.GoToDefinition {
+    function getDefinitionAtPosition(program: Program, sourceFile: SourceFile, position: number): DefinitionInfo[] | undefined;
+    function getReferenceAtPosition(sourceFile: SourceFile, position: number, program: Program): {
+        fileName: string;
+        file: SourceFile;
+    } | undefined;
+    function getTypeDefinitionAtPosition(typeChecker: TypeChecker, sourceFile: SourceFile, position: number): DefinitionInfo[] | undefined;
+    function getDefinitionAndBoundSpan(program: Program, sourceFile: SourceFile, position: number): DefinitionInfoAndBoundSpan | undefined;
+    function findReferenceInPosition(refs: ReadonlyArray<FileReference>, pos: number): FileReference | undefined;
+}
+declare namespace ts.JsDoc {
+    function getJsDocCommentsFromDeclarations(declarations: ReadonlyArray<Declaration>): SymbolDisplayPart[];
+    function getJsDocTagsFromDeclarations(declarations?: Declaration[]): JSDocTagInfo[];
+    function getJSDocTagNameCompletions(): CompletionEntry[];
+    const getJSDocTagNameCompletionDetails: typeof getJSDocTagCompletionDetails;
+    function getJSDocTagCompletions(): CompletionEntry[];
+    function getJSDocTagCompletionDetails(name: string): CompletionEntryDetails;
+    function getJSDocParameterNameCompletions(tag: JSDocParameterTag): CompletionEntry[];
+    function getJSDocParameterNameCompletionDetails(name: string): CompletionEntryDetails;
+    /**
+     * Checks if position points to a valid position to add JSDoc comments, and if so,
+     * returns the appropriate template. Otherwise returns an empty string.
+     * Valid positions are
+     *      - outside of comments, statements, and expressions, and
+     *      - preceding a:
+     *          - function/constructor/method declaration
+     *          - class declarations
+     *          - variable statements
+     *          - namespace declarations
+     *          - interface declarations
+     *          - method signatures
+     *          - type alias declarations
+     *
+     * Hosts should ideally check that:
+     * - The line is all whitespace up to 'position' before performing the insertion.
+     * - If the keystroke sequence "/\*\*" induced the call, we also check that the next
+     * non-whitespace character is '*', which (approximately) indicates whether we added
+     * the second '*' to complete an existing (JSDoc) comment.
+     * @param fileName The file in which to perform the check.
+     * @param position The (character-indexed) position in the file where the check should
+     * be performed.
+     */
+    function getDocCommentTemplateAtPosition(newLine: string, sourceFile: SourceFile, position: number): TextInsertion | undefined;
+}
+declare namespace ts.NavigateTo {
+    function getNavigateToItems(sourceFiles: ReadonlyArray<SourceFile>, checker: TypeChecker, cancellationToken: CancellationToken, searchValue: string, maxResultCount: number | undefined, excludeDtsFiles: boolean): NavigateToItem[];
+}
+declare namespace ts.NavigationBar {
+    function getNavigationBarItems(sourceFile: SourceFile, cancellationToken: CancellationToken): NavigationBarItem[];
+    function getNavigationTree(sourceFile: SourceFile, cancellationToken: CancellationToken): NavigationTree;
+}
+declare namespace ts.OrganizeImports {
+    /**
+     * Organize imports by:
+     *   1) Removing unused imports
+     *   2) Coalescing imports from the same module
+     *   3) Sorting imports
+     */
+    function organizeImports(sourceFile: SourceFile, formatContext: formatting.FormatContext, host: LanguageServiceHost, program: Program, _preferences: UserPreferences): FileTextChanges[];
+    /**
+     * @param importGroup a list of ImportDeclarations, all with the same module name.
+     */
+    function coalesceImports(importGroup: ReadonlyArray<ImportDeclaration>): ReadonlyArray<ImportDeclaration>;
+    /**
+     * @param exportGroup a list of ExportDeclarations, all with the same module name.
+     */
+    function coalesceExports(exportGroup: ReadonlyArray<ExportDeclaration>): ReadonlyArray<ExportDeclaration>;
+    function compareModuleSpecifiers(m1: Expression, m2: Expression): Comparison;
+}
+declare namespace ts.OutliningElementsCollector {
+    function collectElements(sourceFile: SourceFile, cancellationToken: CancellationToken): OutliningSpan[];
+}
+declare namespace ts {
+    enum PatternMatchKind {
+        exact = 0,
+        prefix = 1,
+        substring = 2,
+        camelCase = 3
+    }
+    interface PatternMatch {
+        kind: PatternMatchKind;
+        isCaseSensitive: boolean;
+    }
+    interface PatternMatcher {
+        getMatchForLastSegmentOfPattern(candidate: string): PatternMatch | undefined;
+        getFullMatch(candidateContainers: ReadonlyArray<string>, candidate: string): PatternMatch | undefined;
+        patternContainsDots: boolean;
+    }
+    function createPatternMatcher(pattern: string): PatternMatcher | undefined;
+    function breakIntoCharacterSpans(identifier: string): TextSpan[];
+    function breakIntoWordSpans(identifier: string): TextSpan[];
+}
+declare namespace ts {
+    function preProcessFile(sourceText: string, readImportFiles?: boolean, detectJavaScriptImports?: boolean): PreProcessedFileInfo;
+}
+declare namespace ts.Rename {
+    function getRenameInfo(typeChecker: TypeChecker, defaultLibFileName: string, getCanonicalFileName: GetCanonicalFileName, sourceFile: SourceFile, position: number): RenameInfo;
+}
+declare namespace ts.SignatureHelp {
+    function getSignatureHelpItems(program: Program, sourceFile: SourceFile, position: number, cancellationToken: CancellationToken): SignatureHelpItems | undefined;
+    interface ArgumentInfoForCompletions {
+        readonly invocation: CallLikeExpression;
+        readonly argumentIndex: number;
+        readonly argumentCount: number;
+    }
+    function getArgumentInfoForCompletions(node: Node, position: number, sourceFile: SourceFile): ArgumentInfoForCompletions | undefined;
+}
+declare namespace ts {
+    function computeSuggestionDiagnostics(sourceFile: SourceFile, program: Program, cancellationToken: CancellationToken): DiagnosticWithLocation[];
+}
+declare namespace ts.SymbolDisplay {
+    function getSymbolKind(typeChecker: TypeChecker, symbol: Symbol, location: Node): ScriptElementKind;
+    function getSymbolModifiers(symbol: Symbol): string;
+    interface SymbolDisplayPartsDocumentationAndSymbolKind {
+        displayParts: SymbolDisplayPart[];
+        documentation: SymbolDisplayPart[];
+        symbolKind: ScriptElementKind;
+        tags: JSDocTagInfo[] | undefined;
+    }
+    function getSymbolDisplayPartsDocumentationAndSymbolKind(typeChecker: TypeChecker, symbol: Symbol, sourceFile: SourceFile, enclosingDeclaration: Node | undefined, location: Node, semanticMeaning?: SemanticMeaning, alias?: Symbol): SymbolDisplayPartsDocumentationAndSymbolKind;
+}
+declare namespace ts {
+    interface TranspileOptions {
+        compilerOptions?: CompilerOptions;
+        fileName?: string;
+        reportDiagnostics?: boolean;
+        moduleName?: string;
+        renamedDependencies?: MapLike<string>;
+        transformers?: CustomTransformers;
+    }
+    interface TranspileOutput {
+        outputText: string;
+        diagnostics?: Diagnostic[];
+        sourceMapText?: string;
+    }
+    function transpileModule(input: string, transpileOptions: TranspileOptions): TranspileOutput;
+    function transpile(input: string, compilerOptions?: CompilerOptions, fileName?: string, diagnostics?: Diagnostic[], moduleName?: string): string;
+    /** JS users may pass in string values for enum compiler options (such as ModuleKind), so convert. */
+    function fixupCompilerOptions(options: CompilerOptions, diagnostics: Diagnostic[]): CompilerOptions;
+}
+declare namespace ts.formatting {
+    enum FormattingRequestKind {
+        FormatDocument = 0,
+        FormatSelection = 1,
+        FormatOnEnter = 2,
+        FormatOnSemicolon = 3,
+        FormatOnOpeningCurlyBrace = 4,
+        FormatOnClosingCurlyBrace = 5
+    }
+    class FormattingContext {
+        readonly sourceFile: SourceFileLike;
+        formattingRequestKind: FormattingRequestKind;
+        options: FormatCodeSettings;
+        currentTokenSpan: TextRangeWithKind;
+        nextTokenSpan: TextRangeWithKind;
+        contextNode: Node;
+        currentTokenParent: Node;
+        nextTokenParent: Node;
+        private contextNodeAllOnSameLine;
+        private nextNodeAllOnSameLine;
+        private tokensAreOnSameLine;
+        private contextNodeBlockIsOnOneLine;
+        private nextNodeBlockIsOnOneLine;
+        constructor(sourceFile: SourceFileLike, formattingRequestKind: FormattingRequestKind, options: FormatCodeSettings);
+        updateContext(currentRange: TextRangeWithKind, currentTokenParent: Node, nextRange: TextRangeWithKind, nextTokenParent: Node, commonParent: Node): void;
+        ContextNodeAllOnSameLine(): boolean;
+        NextNodeAllOnSameLine(): boolean;
+        TokensAreOnSameLine(): boolean;
+        ContextNodeBlockIsOnOneLine(): boolean;
+        NextNodeBlockIsOnOneLine(): boolean;
+        private NodeIsOnOneLine;
+        private BlockIsOnOneLine;
+    }
+}
+declare namespace ts.formatting {
+    interface FormattingScanner {
+        advance(): void;
+        isOnToken(): boolean;
+        readTokenInfo(n: Node): TokenInfo;
+        getCurrentLeadingTrivia(): TextRangeWithKind[] | undefined;
+        lastTrailingTriviaWasNewLine(): boolean;
+        skipToEndOf(node: Node): void;
+    }
+    function getFormattingScanner<T>(text: string, languageVariant: LanguageVariant, startPos: number, endPos: number, cb: (scanner: FormattingScanner) => T): T;
+}
+declare namespace ts.formatting {
+    interface Rule {
+        readonly debugName: string;
+        readonly context: ReadonlyArray<ContextPredicate>;
+        readonly action: RuleAction;
+        readonly flags: RuleFlags;
+    }
+    type ContextPredicate = (context: FormattingContext) => boolean;
+    const anyContext: ReadonlyArray<ContextPredicate>;
+    enum RuleAction {
+        Ignore = 1,
+        Space = 2,
+        NewLine = 4,
+        Delete = 8
+    }
+    enum RuleFlags {
+        None = 0,
+        CanDeleteNewLines = 1
+    }
+    interface TokenRange {
+        readonly tokens: ReadonlyArray<SyntaxKind>;
+        readonly isSpecific: boolean;
+    }
+}
+declare namespace ts.formatting {
+    interface RuleSpec {
+        readonly leftTokenRange: TokenRange;
+        readonly rightTokenRange: TokenRange;
+        readonly rule: Rule;
+    }
+    function getAllRules(): RuleSpec[];
+}
+declare namespace ts.formatting {
+    function getFormatContext(options: FormatCodeSettings): FormatContext;
+    type RulesMap = (context: FormattingContext) => Rule | undefined;
+}
+declare namespace ts.formatting {
+    interface FormatContext {
+        readonly options: FormatCodeSettings;
+        readonly getRule: RulesMap;
+    }
+    interface TextRangeWithKind extends TextRange {
+        kind: SyntaxKind;
+    }
+    interface TextRangeWithTriviaKind extends TextRange {
+        kind: TriviaKind;
+    }
+    interface TokenInfo {
+        leadingTrivia: TextRangeWithTriviaKind[] | undefined;
+        token: TextRangeWithKind;
+        trailingTrivia: TextRangeWithTriviaKind[] | undefined;
+    }
+    function formatOnEnter(position: number, sourceFile: SourceFile, formatContext: FormatContext): TextChange[];
+    function formatOnSemicolon(position: number, sourceFile: SourceFile, formatContext: FormatContext): TextChange[];
+    function formatOnOpeningCurly(position: number, sourceFile: SourceFile, formatContext: FormatContext): TextChange[];
+    function formatOnClosingCurly(position: number, sourceFile: SourceFile, formatContext: FormatContext): TextChange[];
+    function formatDocument(sourceFile: SourceFile, formatContext: FormatContext): TextChange[];
+    function formatSelection(start: number, end: number, sourceFile: SourceFile, formatContext: FormatContext): TextChange[];
+    function formatNodeGivenIndentation(node: Node, sourceFileLike: SourceFileLike, languageVariant: LanguageVariant, initialIndentation: number, delta: number, formatContext: FormatContext): TextChange[];
+    /**
+     * @param precedingToken pass `null` if preceding token was already computed and result was `undefined`.
+     */
+    function getRangeOfEnclosingComment(sourceFile: SourceFile, position: number, onlyMultiLine: boolean, precedingToken?: Node | null, // tslint:disable-line:no-null-keyword
+    tokenAtPosition?: Node, predicate?: (c: CommentRange) => boolean): CommentRange | undefined;
+    function getIndentationString(indentation: number, options: EditorSettings): string;
+}
+declare namespace ts.formatting {
+    namespace SmartIndenter {
+        /**
+         * @param assumeNewLineBeforeCloseBrace
+         * `false` when called on text from a real source file.
+         * `true` when we need to assume `position` is on a newline.
+         *
+         * This is useful for codefixes. Consider
+         * ```
+         * function f() {
+         * |}
+         * ```
+         * with `position` at `|`.
+         *
+         * When inserting some text after an open brace, we would like to get indentation as if a newline was already there.
+         * By default indentation at `position` will be 0 so 'assumeNewLineBeforeCloseBrace' overrides this behavior.
+         */
+        function getIndentation(position: number, sourceFile: SourceFile, options: EditorSettings, assumeNewLineBeforeCloseBrace?: boolean): number;
+        function getIndentationForNode(n: Node, ignoreActualIndentationRange: TextRange, sourceFile: SourceFile, options: EditorSettings): number;
+        function getBaseIndentation(options: EditorSettings): number;
+        function isArgumentAndStartLineOverlapsExpressionBeingCalled(parent: Node, child: Node, childStartLine: number, sourceFile: SourceFileLike): boolean;
+        function childStartsOnTheSameLineWithElseInIfStatement(parent: Node, child: TextRangeWithKind, childStartLine: number, sourceFile: SourceFileLike): boolean;
+        function getContainingList(node: Node, sourceFile: SourceFile): NodeArray<Node> | undefined;
+        /**
+         * Character is the actual index of the character since the beginning of the line.
+         * Column - position of the character after expanding tabs to spaces.
+         * "0\t2$"
+         * value of 'character' for '$' is 3
+         * value of 'column' for '$' is 6 (assuming that tab size is 4)
+         */
+        function findFirstNonWhitespaceCharacterAndColumn(startPos: number, endPos: number, sourceFile: SourceFileLike, options: EditorSettings): {
+            column: number;
+            character: number;
+        };
+        function findFirstNonWhitespaceColumn(startPos: number, endPos: number, sourceFile: SourceFileLike, options: EditorSettings): number;
+        function nodeWillIndentChild(settings: FormatCodeSettings, parent: TextRangeWithKind, child: TextRangeWithKind | undefined, sourceFile: SourceFileLike | undefined, indentByDefault: boolean): boolean;
+        /**
+         * True when the parent node should indent the given child by an explicit rule.
+         * @param isNextChild If true, we are judging indent of a hypothetical child *after* this one, not the current child.
+         */
+        function shouldIndentChildNode(settings: FormatCodeSettings, parent: TextRangeWithKind, child?: Node, sourceFile?: SourceFileLike, isNextChild?: boolean): boolean;
+    }
+}
+declare namespace ts.textChanges {
+    interface ConfigurableStart {
+        /** True to use getStart() (NB, not getFullStart()) without adjustment. */
+        useNonAdjustedStartPosition?: boolean;
+    }
+    interface ConfigurableEnd {
+        /** True to use getEnd() without adjustment. */
+        useNonAdjustedEndPosition?: boolean;
+    }
+    enum Position {
+        FullStart = 0,
+        Start = 1
+    }
+    /**
+     * Usually node.pos points to a position immediately after the previous token.
+     * If this position is used as a beginning of the span to remove - it might lead to removing the trailing trivia of the previous node, i.e:
+     * const x; // this is x
+     *        ^ - pos for the next variable declaration will point here
+     * const y; // this is y
+     *        ^ - end for previous variable declaration
+     * Usually leading trivia of the variable declaration 'y' should not include trailing trivia (whitespace, comment 'this is x' and newline) from the preceding
+     * variable declaration and trailing trivia for 'y' should include (whitespace, comment 'this is y', newline).
+     * By default when removing nodes we adjust start and end positions to respect specification of the trivia above.
+     * If pos\end should be interpreted literally 'useNonAdjustedStartPosition' or 'useNonAdjustedEndPosition' should be set to true
+     */
+    interface ConfigurableStartEnd extends ConfigurableStart, ConfigurableEnd {
+    }
+    const useNonAdjustedPositions: ConfigurableStartEnd;
+    interface InsertNodeOptions {
+        /**
+         * Text to be inserted before the new node
+         */
+        prefix?: string;
+        /**
+         * Text to be inserted after the new node
+         */
+        suffix?: string;
+        /**
+         * Text of inserted node will be formatted with this indentation, otherwise indentation will be inferred from the old node
+         */
+        indentation?: number;
+        /**
+         * Text of inserted node will be formatted with this delta, otherwise delta will be inferred from the new node kind
+         */
+        delta?: number;
+        /**
+         * Do not trim leading white spaces in the edit range
+         */
+        preserveLeadingWhitespace?: boolean;
+    }
+    interface ReplaceWithMultipleNodesOptions extends InsertNodeOptions {
+        readonly joiner?: string;
+    }
+    interface ChangeNodeOptions extends ConfigurableStartEnd, InsertNodeOptions {
+    }
+    interface TextChangesContext {
+        host: LanguageServiceHost;
+        formatContext: formatting.FormatContext;
+    }
+    type TypeAnnotatable = SignatureDeclaration | VariableDeclaration | ParameterDeclaration | PropertyDeclaration | PropertySignature;
+    class ChangeTracker {
+        private readonly newLineCharacter;
+        private readonly formatContext;
+        private readonly changes;
+        private readonly newFiles;
+        private readonly deletedNodesInLists;
+        private readonly classesWithNodesInsertedAtStart;
+        static fromContext(context: TextChangesContext): ChangeTracker;
+        static with(context: TextChangesContext, cb: (tracker: ChangeTracker) => void): FileTextChanges[];
+        /** Public for tests only. Other callers should use `ChangeTracker.with`. */
+        constructor(newLineCharacter: string, formatContext: formatting.FormatContext);
+        deleteRange(sourceFile: SourceFile, range: TextRange): this;
+        /** Warning: This deletes comments too. See `copyComments` in `convertFunctionToEs6Class`. */
+        deleteNode(sourceFile: SourceFile, node: Node, options?: ConfigurableStartEnd): this;
+        deleteNodeRange(sourceFile: SourceFile, startNode: Node, endNode: Node, options?: ConfigurableStartEnd): this;
+        deleteNodeRangeExcludingEnd(sourceFile: SourceFile, startNode: Node, afterEndNode: Node | undefined, options?: ConfigurableStartEnd): void;
+        deleteNodeInList(sourceFile: SourceFile, node: Node): this;
+        replaceRange(sourceFile: SourceFile, range: TextRange, newNode: Node, options?: InsertNodeOptions): this;
+        replaceNode(sourceFile: SourceFile, oldNode: Node, newNode: Node, options?: ChangeNodeOptions): this;
+        replaceNodeRange(sourceFile: SourceFile, startNode: Node, endNode: Node, newNode: Node, options?: ChangeNodeOptions): void;
+        private replaceRangeWithNodes;
+        replaceNodeWithNodes(sourceFile: SourceFile, oldNode: Node, newNodes: ReadonlyArray<Node>, options?: ChangeNodeOptions): this;
+        replaceNodeRangeWithNodes(sourceFile: SourceFile, startNode: Node, endNode: Node, newNodes: ReadonlyArray<Node>, options?: ReplaceWithMultipleNodesOptions & ConfigurableStartEnd): this;
+        private nextCommaToken;
+        replacePropertyAssignment(sourceFile: SourceFile, oldNode: PropertyAssignment, newNode: PropertyAssignment): this;
+        private insertNodeAt;
+        private insertNodesAt;
+        insertNodeAtTopOfFile(sourceFile: SourceFile, newNode: Statement, blankLineBetween: boolean): void;
+        insertNodeBefore(sourceFile: SourceFile, before: Node, newNode: Node, blankLineBetween?: boolean): void;
+        insertModifierBefore(sourceFile: SourceFile, modifier: SyntaxKind, before: Node): void;
+        insertCommentBeforeLine(sourceFile: SourceFile, lineNumber: number, position: number, commentText: string): void;
+        replaceRangeWithText(sourceFile: SourceFile, range: TextRange, text: string): void;
+        private insertText;
+        /** Prefer this over replacing a node with another that has a type annotation, as it avoids reformatting the other parts of the node. */
+        tryInsertTypeAnnotation(sourceFile: SourceFile, node: TypeAnnotatable, type: TypeNode): void;
+        insertTypeParameters(sourceFile: SourceFile, node: SignatureDeclaration, typeParameters: ReadonlyArray<TypeParameterDeclaration>): void;
+        private getOptionsForInsertNodeBefore;
+        insertNodeAtConstructorStart(sourceFile: SourceFile, ctr: ConstructorDeclaration, newStatement: Statement): void;
+        insertNodeAtConstructorEnd(sourceFile: SourceFile, ctr: ConstructorDeclaration, newStatement: Statement): void;
+        private replaceConstructorBody;
+        insertNodeAtEndOfScope(sourceFile: SourceFile, scope: Node, newNode: Node): void;
+        insertNodeAtClassStart(sourceFile: SourceFile, cls: ClassLikeDeclaration, newElement: ClassElement): void;
+        private getInsertNodeAtClassStartPrefixSuffix;
+        insertNodeAfterComma(sourceFile: SourceFile, after: Node, newNode: Node): void;
+        insertNodeAfter(sourceFile: SourceFile, after: Node, newNode: Node): void;
+        insertNodesAfter(sourceFile: SourceFile, after: Node, newNodes: ReadonlyArray<Node>): void;
+        private insertNodeAfterWorker;
+        private getInsertNodeAfterOptions;
+        private getInsertNodeAfterOptionsWorker;
+        insertName(sourceFile: SourceFile, node: FunctionExpression | ClassExpression | ArrowFunction, name: string): void;
+        insertExportModifier(sourceFile: SourceFile, node: DeclarationStatement | VariableStatement): void;
+        /**
+         * This function should be used to insert nodes in lists when nodes don't carry separators as the part of the node range,
+         * i.e. arguments in arguments lists, parameters in parameter lists etc.
+         * Note that separators are part of the node in statements and class elements.
+         */
+        insertNodeInListAfter(sourceFile: SourceFile, after: Node, newNode: Node, containingList?: NodeArray<Node> | undefined): this;
+        private finishClassesWithNodesInsertedAtStart;
+        private finishTrailingCommaAfterDeletingNodesInList;
+        /**
+         * Note: after calling this, the TextChanges object must be discarded!
+         * @param validate only for tests
+         *    The reason we must validate as part of this method is that `getNonFormattedText` changes the node's positions,
+         *    so we can only call this once and can't get the non-formatted text separately.
+         */
+        getChanges(validate?: ValidateNonFormattedText): FileTextChanges[];
+        createNewFile(oldFile: SourceFile, fileName: string, statements: ReadonlyArray<Statement>): void;
+    }
+    type ValidateNonFormattedText = (node: Node, text: string) => void;
+    function applyChanges(text: string, changes: TextChange[]): string;
+    function isValidLocationToAddComment(sourceFile: SourceFile, position: number): boolean;
+}
+declare namespace ts {
+    interface CodeFixRegistration {
+        errorCodes: number[];
+        getCodeActions(context: CodeFixContext): CodeFixAction[] | undefined;
+        fixIds?: string[];
+        getAllCodeActions?(context: CodeFixAllContext): CombinedCodeActions;
+    }
+    interface CodeFixContextBase extends textChanges.TextChangesContext {
+        sourceFile: SourceFile;
+        program: Program;
+        cancellationToken: CancellationToken;
+        preferences: UserPreferences;
+    }
+    interface CodeFixAllContext extends CodeFixContextBase {
+        fixId: {};
+    }
+    interface CodeFixContext extends CodeFixContextBase {
+        errorCode: number;
+        span: TextSpan;
+    }
+    namespace codefix {
+        type DiagnosticAndArguments = DiagnosticMessage | [DiagnosticMessage, string] | [DiagnosticMessage, string, string];
+        function createCodeFixActionNoFixId(fixName: string, changes: FileTextChanges[], description: DiagnosticAndArguments): CodeFixAction;
+        function createCodeFixAction(fixName: string, changes: FileTextChanges[], description: DiagnosticAndArguments, fixId: {}, fixAllDescription: DiagnosticAndArguments, command?: CodeActionCommand): CodeFixAction;
+        function registerCodeFix(reg: CodeFixRegistration): void;
+        function getSupportedErrorCodes(): string[];
+        function getFixes(context: CodeFixContext): CodeFixAction[];
+        function getAllFixes(context: CodeFixAllContext): CombinedCodeActions;
+        function createFileTextChanges(fileName: string, textChanges: TextChange[]): FileTextChanges;
+        function codeFixAll(context: CodeFixAllContext, errorCodes: number[], use: (changes: textChanges.ChangeTracker, error: DiagnosticWithLocation, commands: Push<CodeActionCommand>) => void): CombinedCodeActions;
+    }
+}
+declare namespace ts {
+    interface Refactor {
+        /** Compute the associated code actions */
+        getEditsForAction(context: RefactorContext, actionName: string): RefactorEditInfo | undefined;
+        /** Compute (quickly) which actions are available here */
+        getAvailableActions(context: RefactorContext): ApplicableRefactorInfo[] | undefined;
+    }
+    interface RefactorContext extends textChanges.TextChangesContext {
+        file: SourceFile;
+        startPosition: number;
+        endPosition?: number;
+        program: Program;
+        cancellationToken?: CancellationToken;
+        preferences: UserPreferences;
+    }
+    namespace refactor {
+        /** @param name An unique code associated with each refactor. Does not have to be human-readable. */
+        function registerRefactor(name: string, refactor: Refactor): void;
+        function getApplicableRefactors(context: RefactorContext): ApplicableRefactorInfo[];
+        function getEditsForRefactor(context: RefactorContext, refactorName: string, actionName: string): RefactorEditInfo | undefined;
+    }
+    function getRefactorContextSpan({ startPosition, endPosition }: RefactorContext): TextSpan;
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.codefix {
+    type DeclarationWithType = FunctionLikeDeclaration | VariableDeclaration | PropertySignature | PropertyDeclaration;
+    function parameterShouldGetTypeFromJSDoc(node: Node): node is DeclarationWithType;
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.codefix {
+    function getImportCompletionAction(exportedSymbol: Symbol, moduleSymbol: Symbol, sourceFile: SourceFile, symbolName: string, host: LanguageServiceHost, program: Program, checker: TypeChecker, compilerOptions: CompilerOptions, allSourceFiles: ReadonlyArray<SourceFile>, formatContext: formatting.FormatContext, getCanonicalFileName: GetCanonicalFileName, symbolToken: Node | undefined, preferences: UserPreferences): {
+        readonly moduleSpecifier: string;
+        readonly codeAction: CodeAction;
+    };
+    function forEachExternalModuleToImportFrom(checker: TypeChecker, from: SourceFile, allSourceFiles: ReadonlyArray<SourceFile>, cb: (module: Symbol) => void): void;
+    function moduleSymbolToValidIdentifier(moduleSymbol: Symbol, target: ScriptTarget): string;
+    function moduleSpecifierToValidIdentifier(moduleSpecifier: string, target: ScriptTarget): string;
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.codefix {
+    /**
+     * Finds members of the resolved type that are missing in the class pointed to by class decl
+     * and generates source code for the missing members.
+     * @param possiblyMissingSymbols The collection of symbols to filter and then get insertions for.
+     * @returns Empty string iff there are no member insertions.
+     */
+    function createMissingMemberNodes(classDeclaration: ClassLikeDeclaration, possiblyMissingSymbols: ReadonlyArray<Symbol>, checker: TypeChecker, preferences: UserPreferences, out: (node: ClassElement) => void): void;
+    function createMethodFromCallExpression({ typeArguments, arguments: args, parent: parent }: CallExpression, methodName: string, inJs: boolean, makeStatic: boolean, preferences: UserPreferences): MethodDeclaration;
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.refactor.generateGetAccessorAndSetAccessor {
+}
+declare namespace ts.refactor.extractSymbol {
+    /**
+     * Compute the associated code actions
+     * Exported for tests.
+     */
+    function getAvailableActions(context: RefactorContext): ApplicableRefactorInfo[] | undefined;
+    function getEditsForAction(context: RefactorContext, actionName: string): RefactorEditInfo | undefined;
+    namespace Messages {
+        const cannotExtractRange: DiagnosticMessage;
+        const cannotExtractImport: DiagnosticMessage;
+        const cannotExtractSuper: DiagnosticMessage;
+        const cannotExtractEmpty: DiagnosticMessage;
+        const expressionExpected: DiagnosticMessage;
+        const uselessConstantType: DiagnosticMessage;
+        const statementOrExpressionExpected: DiagnosticMessage;
+        const cannotExtractRangeContainingConditionalBreakOrContinueStatements: DiagnosticMessage;
+        const cannotExtractRangeContainingConditionalReturnStatement: DiagnosticMessage;
+        const cannotExtractRangeContainingLabeledBreakOrContinueStatementWithTargetOutsideOfTheRange: DiagnosticMessage;
+        const cannotExtractRangeThatContainsWritesToReferencesLocatedOutsideOfTheTargetRangeInGenerators: DiagnosticMessage;
+        const typeWillNotBeVisibleInTheNewScope: DiagnosticMessage;
+        const functionWillNotBeVisibleInTheNewScope: DiagnosticMessage;
+        const cannotExtractIdentifier: DiagnosticMessage;
+        const cannotExtractExportedEntity: DiagnosticMessage;
+        const cannotWriteInExpression: DiagnosticMessage;
+        const cannotExtractReadonlyPropertyInitializerOutsideConstructor: DiagnosticMessage;
+        const cannotExtractAmbientBlock: DiagnosticMessage;
+        const cannotAccessVariablesFromNestedScopes: DiagnosticMessage;
+        const cannotExtractToOtherFunctionLike: DiagnosticMessage;
+        const cannotExtractToJSClass: DiagnosticMessage;
+        const cannotExtractToExpressionArrowFunction: DiagnosticMessage;
+    }
+    enum RangeFacts {
+        None = 0,
+        HasReturn = 1,
+        IsGenerator = 2,
+        IsAsyncFunction = 4,
+        UsesThis = 8,
+        /**
+         * The range is in a function which needs the 'static' modifier in a class
+         */
+        InStaticRegion = 16
+    }
+    /**
+     * Represents an expression or a list of statements that should be extracted with some extra information
+     */
+    interface TargetRange {
+        readonly range: Expression | Statement[];
+        readonly facts: RangeFacts;
+        /**
+         * A list of symbols that are declared in the selected range which are visible in the containing lexical scope
+         * Used to ensure we don't turn something used outside the range free (or worse, resolve to a different entity).
+         */
+        readonly declarations: Symbol[];
+    }
+    /**
+     * Result of 'getRangeToExtract' operation: contains either a range or a list of errors
+     */
+    type RangeToExtract = {
+        readonly targetRange?: never;
+        readonly errors: ReadonlyArray<Diagnostic>;
+    } | {
+        readonly targetRange: TargetRange;
+        readonly errors?: never;
+    };
+    /**
+     * getRangeToExtract takes a span inside a text file and returns either an expression or an array
+     * of statements representing the minimum set of nodes needed to extract the entire span. This
+     * process may fail, in which case a set of errors is returned instead (these are currently
+     * not shown to the user, but can be used by us diagnostically)
+     */
+    function getRangeToExtract(sourceFile: SourceFile, span: TextSpan): RangeToExtract;
+}
+declare namespace ts.refactor.generateGetAccessorAndSetAccessor {
+}
+declare namespace ts.refactor {
+}
+declare namespace ts.refactor.addOrRemoveBracesToArrowFunction {
+}
+declare namespace ts.sourcemaps {
+    interface SourceMapData {
+        version?: number;
+        file?: string;
+        sourceRoot?: string;
+        sources: string[];
+        sourcesContent?: string[];
+        names?: string[];
+        mappings: string;
+    }
+    interface SourceMappableLocation {
+        fileName: string;
+        position: number;
+    }
+    interface SourceMapper {
+        getOriginalPosition(input: SourceMappableLocation): SourceMappableLocation;
+        getGeneratedPosition(input: SourceMappableLocation): SourceMappableLocation;
+    }
+    const identitySourceMapper: {
+        getOriginalPosition: typeof identity;
+        getGeneratedPosition: typeof identity;
+    };
+    interface SourceMapDecodeHost {
+        readFile(path: string): string | undefined;
+        fileExists(path: string): boolean;
+        getCanonicalFileName(path: string): string;
+        log(text: string): void;
+    }
+    function decode(host: SourceMapDecodeHost, mapPath: string, map: SourceMapData, program?: Program, fallbackCache?: SourceFileLikeCache): SourceMapper;
+}
+declare namespace ts {
+    /** The version of the language service API */
+    const servicesVersion = "0.8";
+    interface DisplayPartsSymbolWriter extends EmitTextWriter {
+        displayParts(): SymbolDisplayPart[];
+    }
+    function toEditorSettings(options: FormatCodeOptions | FormatCodeSettings): FormatCodeSettings;
+    function toEditorSettings(options: EditorOptions | EditorSettings): EditorSettings;
+    function displayPartsToString(displayParts: SymbolDisplayPart[] | undefined): string;
+    function getDefaultCompilerOptions(): CompilerOptions;
+    function getSupportedCodeFixes(): string[];
+    function createLanguageServiceSourceFile(fileName: string, scriptSnapshot: IScriptSnapshot, scriptTarget: ScriptTarget, version: string, setNodeParents: boolean, scriptKind?: ScriptKind): SourceFile;
+    let disableIncrementalParsing: boolean;
+    function updateLanguageServiceSourceFile(sourceFile: SourceFile, scriptSnapshot: IScriptSnapshot, version: string, textChangeRange: TextChangeRange | undefined, aggressiveChecks?: boolean): SourceFile;
+    /** A cancellation that throttles calls to the host */
+    class ThrottledCancellationToken implements CancellationToken {
+        private hostCancellationToken;
+        private readonly throttleWaitMilliseconds;
+        private lastCancellationCheckTime;
+        constructor(hostCancellationToken: HostCancellationToken, throttleWaitMilliseconds?: number);
+        isCancellationRequested(): boolean;
+        throwIfCancellationRequested(): void;
+    }
+    interface SourceFileLikeCache {
+        get(path: Path): SourceFileLike | undefined;
+    }
+    function createSourceFileLikeCache(host: {
+        readFile?: (path: string) => string | undefined;
+        fileExists?: (path: string) => boolean;
+    }): SourceFileLikeCache;
+    function createLanguageService(host: LanguageServiceHost, documentRegistry?: DocumentRegistry, syntaxOnly?: boolean): LanguageService;
+    /** Names in the name table are escaped, so an identifier `__foo` will have a name table entry `___foo`. */
+    function getNameTable(sourceFile: SourceFile): UnderscoreEscapedMap<number>;
+    /**
+     * Returns the containing object literal property declaration given a possible name node, e.g. "a" in x = { "a": 1 }
+     */
+    function getContainingObjectLiteralElement(node: Node): ObjectLiteralElement | undefined;
+    function getPropertySymbolsFromContextualType(typeChecker: TypeChecker, node: ObjectLiteralElement): Symbol[];
+    function getPropertySymbolsFromType(type: Type, propName: PropertyName): Symbol[] | undefined;
+    /**
+     * Get the path of the default library files (lib.d.ts) as distributed with the typescript
+     * node package.
+     * The functionality is not supported if the ts module is consumed outside of a node module.
+     */
+    function getDefaultLibFilePath(options: CompilerOptions): string;
+}
+declare namespace ts.BreakpointResolver {
+    /**
+     * Get the breakpoint span in given sourceFile
+     */
+    function spanInSourceFileAtLocation(sourceFile: SourceFile, position: number): TextSpan | undefined;
+}
+declare namespace ts {
+    /**
+     * Transform one or more nodes using the supplied transformers.
+     * @param source A single `Node` or an array of `Node` objects.
+     * @param transformers An array of `TransformerFactory` callbacks used to process the transformation.
+     * @param compilerOptions Optional compiler options.
+     */
+    function transform<T extends Node>(source: T | T[], transformers: TransformerFactory<T>[], compilerOptions?: CompilerOptions): TransformationResult<T>;
+}
+declare let debugObjectHost: {
+    CollectGarbage(): void;
+};
+declare namespace ts {
+    interface ScriptSnapshotShim {
+        /** Gets a portion of the script snapshot specified by [start, end). */
+        getText(start: number, end: number): string;
+        /** Gets the length of this script snapshot. */
+        getLength(): number;
+        /**
+         * Returns a JSON-encoded value of the type:
+         *   { span: { start: number; length: number }; newLength: number }
+         *
+         * Or undefined value if there was no change.
+         */
+        getChangeRange(oldSnapshot: ScriptSnapshotShim): string | undefined;
+        /** Releases all resources held by this script snapshot */
+        dispose?(): void;
+    }
+    interface Logger {
+        log(s: string): void;
+        trace(s: string): void;
+        error(s: string): void;
+    }
+    /** Public interface of the host of a language service shim instance. */
+    interface LanguageServiceShimHost extends Logger {
+        getCompilationSettings(): string;
+        /** Returns a JSON-encoded value of the type: string[] */
+        getScriptFileNames(): string;
+        getScriptKind?(fileName: string): ScriptKind;
+        getScriptVersion(fileName: string): string;
+        getScriptSnapshot(fileName: string): ScriptSnapshotShim;
+        getLocalizedDiagnosticMessages(): string;
+        getCancellationToken(): HostCancellationToken;
+        getCurrentDirectory(): string;
+        getDirectories(path: string): string;
+        getDefaultLibFileName(options: string): string;
+        getNewLine?(): string;
+        getProjectVersion?(): string;
+        useCaseSensitiveFileNames?(): boolean;
+        getTypeRootsVersion?(): number;
+        readDirectory(rootDir: string, extension: string, basePaths?: string, excludeEx?: string, includeFileEx?: string, includeDirEx?: string, depth?: number): string;
+        readFile(path: string, encoding?: string): string | undefined;
+        fileExists(path: string): boolean;
+        getModuleResolutionsForFile?(fileName: string): string;
+        getTypeReferenceDirectiveResolutionsForFile?(fileName: string): string;
+        directoryExists(directoryName: string): boolean;
+    }
+    /** Public interface of the core-services host instance used in managed side */
+    interface CoreServicesShimHost extends Logger {
+        directoryExists(directoryName: string): boolean;
+        fileExists(fileName: string): boolean;
+        getCurrentDirectory(): string;
+        getDirectories(path: string): string;
+        /**
+         * Returns a JSON-encoded value of the type: string[]
+         *
+         * @param exclude A JSON encoded string[] containing the paths to exclude
+         *  when enumerating the directory.
+         */
+        readDirectory(rootDir: string, extension: string, basePaths?: string, excludeEx?: string, includeFileEx?: string, includeDirEx?: string, depth?: number): string;
+        /**
+         * Read arbitary text files on disk, i.e. when resolution procedure needs the content of 'package.json' to determine location of bundled typings for node modules
+         */
+        readFile(fileName: string): string | undefined;
+        realpath?(path: string): string;
+        trace(s: string): void;
+        useCaseSensitiveFileNames?(): boolean;
+    }
+    interface ShimsFileReference {
+        path: string;
+        position: number;
+        length: number;
+    }
+    /** Public interface of a language service instance shim. */
+    interface ShimFactory {
+        registerShim(shim: Shim): void;
+        unregisterShim(shim: Shim): void;
+    }
+    interface Shim {
+        dispose(_dummy: {}): void;
+    }
+    interface LanguageServiceShim extends Shim {
+        languageService: LanguageService;
+        dispose(_dummy: {}): void;
+        refresh(throwOnError: boolean): void;
+        cleanupSemanticCache(): void;
+        getSyntacticDiagnostics(fileName: string): string;
+        getSemanticDiagnostics(fileName: string): string;
+        getSuggestionDiagnostics(fileName: string): string;
+        getCompilerOptionsDiagnostics(): string;
+        getSyntacticClassifications(fileName: string, start: number, length: number): string;
+        getSemanticClassifications(fileName: string, start: number, length: number): string;
+        getEncodedSyntacticClassifications(fileName: string, start: number, length: number): string;
+        getEncodedSemanticClassifications(fileName: string, start: number, length: number): string;
+        getCompletionsAtPosition(fileName: string, position: number, preferences: UserPreferences | undefined): string;
+        getCompletionEntryDetails(fileName: string, position: number, entryName: string, formatOptions: string | undefined, source: string | undefined, preferences: UserPreferences | undefined): string;
+        getQuickInfoAtPosition(fileName: string, position: number): string;
+        getNameOrDottedNameSpan(fileName: string, startPos: number, endPos: number): string;
+        getBreakpointStatementAtPosition(fileName: string, position: number): string;
+        getSignatureHelpItems(fileName: string, position: number): string;
+        /**
+         * Returns a JSON-encoded value of the type:
+         * { canRename: boolean, localizedErrorMessage: string, displayName: string, fullDisplayName: string, kind: string, kindModifiers: string, triggerSpan: { start; length } }
+         */
+        getRenameInfo(fileName: string, position: number): string;
+        /**
+         * Returns a JSON-encoded value of the type:
+         * { fileName: string, textSpan: { start: number, length: number } }[]
+         */
+        findRenameLocations(fileName: string, position: number, findInStrings: boolean, findInComments: boolean): string;
+        /**
+         * Returns a JSON-encoded value of the type:
+         * { fileName: string; textSpan: { start: number; length: number}; kind: string; name: string; containerKind: string; containerName: string }
+         *
+         * Or undefined value if no definition can be found.
+         */
+        getDefinitionAtPosition(fileName: string, position: number): string;
+        getDefinitionAndBoundSpan(fileName: string, position: number): string;
+        /**
+         * Returns a JSON-encoded value of the type:
+         * { fileName: string; textSpan: { start: number; length: number}; kind: string; name: string; containerKind: string; containerName: string }
+         *
+         * Or undefined value if no definition can be found.
+         */
+        getTypeDefinitionAtPosition(fileName: string, position: number): string;
+        /**
+         * Returns a JSON-encoded value of the type:
+         * { fileName: string; textSpan: { start: number; length: number}; }[]
+         */
+        getImplementationAtPosition(fileName: string, position: number): string;
+        /**
+         * Returns a JSON-encoded value of the type:
+         * { fileName: string; textSpan: { start: number; length: number}; isWriteAccess: boolean, isDefinition?: boolean }[]
+         */
+        getReferencesAtPosition(fileName: string, position: number): string;
+        /**
+         * Returns a JSON-encoded value of the type:
+         * { definition: <encoded>; references: <encoded>[] }[]
+         */
+        findReferences(fileName: string, position: number): string;
+        /**
+         * @deprecated
+         * Returns a JSON-encoded value of the type:
+         * { fileName: string; textSpan: { start: number; length: number}; isWriteAccess: boolean }[]
+         */
+        getOccurrencesAtPosition(fileName: string, position: number): string;
+        /**
+         * Returns a JSON-encoded value of the type:
+         * { fileName: string; highlights: { start: number; length: number, isDefinition: boolean }[] }[]
+         *
+         * @param fileToSearch A JSON encoded string[] containing the file names that should be
+         *  considered when searching.
+         */
+        getDocumentHighlights(fileName: string, position: number, filesToSearch: string): string;
+        /**
+         * Returns a JSON-encoded value of the type:
+         * { name: string; kind: string; kindModifiers: string; containerName: string; containerKind: string; matchKind: string; fileName: string; textSpan: { start: number; length: number}; } [] = [];
+         */
+        getNavigateToItems(searchValue: string, maxResultCount?: number, fileName?: string): string;
+        /**
+         * Returns a JSON-encoded value of the type:
+         * { text: string; kind: string; kindModifiers: string; bolded: boolean; grayed: boolean; indent: number; spans: { start: number; length: number; }[]; childItems: <recursive use of this type>[] } [] = [];
+         */
+        getNavigationBarItems(fileName: string): string;
+        /** Returns a JSON-encoded value of the type ts.NavigationTree. */
+        getNavigationTree(fileName: string): string;
+        /**
+         * Returns a JSON-encoded value of the type:
+         * { textSpan: { start: number, length: number }; hintSpan: { start: number, length: number }; bannerText: string; autoCollapse: boolean } [] = [];
+         */
+        getOutliningSpans(fileName: string): string;
+        getTodoComments(fileName: string, todoCommentDescriptors: string): string;
+        getBraceMatchingAtPosition(fileName: string, position: number): string;
+        getIndentationAtPosition(fileName: string, position: number, options: string): string;
+        getFormattingEditsForRange(fileName: string, start: number, end: number, options: string): string;
+        getFormattingEditsForDocument(fileName: string, options: string): string;
+        getFormattingEditsAfterKeystroke(fileName: string, position: number, key: string, options: string): string;
+        /**
+         * Returns JSON-encoded value of the type TextInsertion.
+         */
+        getDocCommentTemplateAtPosition(fileName: string, position: number): string;
+        /**
+         * Returns JSON-encoded boolean to indicate whether we should support brace location
+         * at the current position.
+         * E.g. we don't want brace completion inside string-literals, comments, etc.
+         */
+        isValidBraceCompletionAtPosition(fileName: string, position: number, openingBrace: number): string;
+        /**
+         * Returns a JSON-encoded TextSpan | undefined indicating the range of the enclosing comment, if it exists.
+         */
+        getSpanOfEnclosingComment(fileName: string, position: number, onlyMultiLine: boolean): string;
+        getEmitOutput(fileName: string): string;
+        getEmitOutputObject(fileName: string): EmitOutput;
+    }
+    interface ClassifierShim extends Shim {
+        getEncodedLexicalClassifications(text: string, lexState: EndOfLineState, syntacticClassifierAbsent?: boolean): string;
+        getClassificationsForLine(text: string, lexState: EndOfLineState, syntacticClassifierAbsent?: boolean): string;
+    }
+    interface CoreServicesShim extends Shim {
+        getAutomaticTypeDirectiveNames(compilerOptionsJson: string): string;
+        getPreProcessedFileInfo(fileName: string, sourceText: IScriptSnapshot): string;
+        getTSConfigFileInfo(fileName: string, sourceText: IScriptSnapshot): string;
+        getDefaultCompilationSettings(): string;
+        discoverTypings(discoverTypingsJson: string): string;
+    }
+    class LanguageServiceShimHostAdapter implements LanguageServiceHost {
+        private shimHost;
+        private files;
+        private loggingEnabled;
+        private tracingEnabled;
+        resolveModuleNames: (moduleName: string[], containingFile: string) => ResolvedModuleFull[];
+        resolveTypeReferenceDirectives: (typeDirectiveNames: string[], containingFile: string) => ResolvedTypeReferenceDirective[];
+        directoryExists: (directoryName: string) => boolean;
+        constructor(shimHost: LanguageServiceShimHost);
+        log(s: string): void;
+        trace(s: string): void;
+        error(s: string): void;
+        getProjectVersion(): string;
+        getTypeRootsVersion(): number;
+        useCaseSensitiveFileNames(): boolean;
+        getCompilationSettings(): CompilerOptions;
+        getScriptFileNames(): string[];
+        getScriptSnapshot(fileName: string): IScriptSnapshot | undefined;
+        getScriptKind(fileName: string): ScriptKind;
+        getScriptVersion(fileName: string): string;
+        getLocalizedDiagnosticMessages(): any;
+        getCancellationToken(): HostCancellationToken;
+        getCurrentDirectory(): string;
+        getDirectories(path: string): string[];
+        getDefaultLibFileName(options: CompilerOptions): string;
+        readDirectory(path: string, extensions?: ReadonlyArray<string>, exclude?: string[], include?: string[], depth?: number): string[];
+        readFile(path: string, encoding?: string): string | undefined;
+        fileExists(path: string): boolean;
+    }
+    class CoreServicesShimHostAdapter implements ParseConfigHost, ModuleResolutionHost, JsTyping.TypingResolutionHost {
+        private shimHost;
+        directoryExists: (directoryName: string) => boolean;
+        realpath: (path: string) => string;
+        useCaseSensitiveFileNames: boolean;
+        constructor(shimHost: CoreServicesShimHost);
+        readDirectory(rootDir: string, extensions: ReadonlyArray<string>, exclude: ReadonlyArray<string>, include: ReadonlyArray<string>, depth?: number): string[];
+        fileExists(fileName: string): boolean;
+        readFile(fileName: string): string | undefined;
+        getDirectories(path: string): string[];
+    }
+    interface RealizedDiagnostic {
+        message: string;
+        start: number;
+        length: number;
+        category: string;
+        code: number;
+        reportsUnnecessary?: {};
     }
-    interface TranspileOutput {
-        outputText: string;
-        diagnostics?: Diagnostic[];
-        sourceMapText?: string;
+    function realizeDiagnostics(diagnostics: ReadonlyArray<Diagnostic>, newLine: string): RealizedDiagnostic[];
+    class TypeScriptServicesFactory implements ShimFactory {
+        private _shims;
+        private documentRegistry;
+        getServicesVersion(): string;
+        createLanguageServiceShim(host: LanguageServiceShimHost): LanguageServiceShim;
+        createClassifierShim(logger: Logger): ClassifierShim;
+        createCoreServicesShim(host: CoreServicesShimHost): CoreServicesShim;
+        close(): void;
+        registerShim(shim: Shim): void;
+        unregisterShim(shim: Shim): void;
     }
-    function transpileModule(input: string, transpileOptions: TranspileOptions): TranspileOutput;
-    function transpile(input: string, compilerOptions?: CompilerOptions, fileName?: string, diagnostics?: Diagnostic[], moduleName?: string): string;
-}
-declare namespace ts {
-    /** The version of the language service API */
-    const servicesVersion = "0.8";
-    function toEditorSettings(options: EditorOptions | EditorSettings): EditorSettings;
-    function displayPartsToString(displayParts: SymbolDisplayPart[] | undefined): string;
-    function getDefaultCompilerOptions(): CompilerOptions;
-    function getSupportedCodeFixes(): string[];
-    function createLanguageServiceSourceFile(fileName: string, scriptSnapshot: IScriptSnapshot, scriptTarget: ScriptTarget, version: string, setNodeParents: boolean, scriptKind?: ScriptKind): SourceFile;
-    let disableIncrementalParsing: boolean;
-    function updateLanguageServiceSourceFile(sourceFile: SourceFile, scriptSnapshot: IScriptSnapshot, version: string, textChangeRange: TextChangeRange | undefined, aggressiveChecks?: boolean): SourceFile;
-    function createLanguageService(host: LanguageServiceHost, documentRegistry?: DocumentRegistry, syntaxOnly?: boolean): LanguageService;
-    /**
-     * Get the path of the default library files (lib.d.ts) as distributed with the typescript
-     * node package.
-     * The functionality is not supported if the ts module is consumed outside of a node module.
-     */
-    function getDefaultLibFilePath(options: CompilerOptions): string;
 }
-declare namespace ts {
-    /**
-     * Transform one or more nodes using the supplied transformers.
-     * @param source A single `Node` or an array of `Node` objects.
-     * @param transformers An array of `TransformerFactory` callbacks used to process the transformation.
-     * @param compilerOptions Optional compiler options.
-     */
-    function transform<T extends Node>(source: T | T[], transformers: TransformerFactory<T>[], compilerOptions?: CompilerOptions): TransformationResult<T>;
+declare namespace TypeScript.Services {
+    const TypeScriptServicesFactory: typeof ts.TypeScriptServicesFactory;
 }
+declare const toolsVersion = "3.0";
+//# sourceMappingURL=services.d.ts.map
 declare namespace ts.server {
     interface CompressedData {
         length: number;
@@ -5373,101 +12051,6 @@ declare namespace ts.server {
         trace?(s: string): void;
         require?(initialPath: string, moduleName: string): RequireResult;
     }
-    interface SortedReadonlyArray<T> extends ReadonlyArray<T> {
-        " __sortedArrayBrand": any;
-    }
-    interface TypingInstallerRequestWithProjectName {
-        readonly projectName: string;
-    }
-    interface DiscoverTypings extends TypingInstallerRequestWithProjectName {
-        readonly fileNames: string[];
-        readonly projectRootPath: Path;
-        readonly compilerOptions: CompilerOptions;
-        readonly typeAcquisition: TypeAcquisition;
-        readonly unresolvedImports: SortedReadonlyArray<string>;
-        readonly cachePath?: string;
-        readonly kind: "discover";
-    }
-    interface CloseProject extends TypingInstallerRequestWithProjectName {
-        readonly kind: "closeProject";
-    }
-    interface TypesRegistryRequest {
-        readonly kind: "typesRegistry";
-    }
-    interface InstallPackageRequest extends TypingInstallerRequestWithProjectName {
-        readonly kind: "installPackage";
-        readonly fileName: Path;
-        readonly packageName: string;
-        readonly projectRootPath: Path;
-    }
-    type ActionSet = "action::set";
-    type ActionInvalidate = "action::invalidate";
-    type ActionPackageInstalled = "action::packageInstalled";
-    type EventTypesRegistry = "event::typesRegistry";
-    type EventBeginInstallTypes = "event::beginInstallTypes";
-    type EventEndInstallTypes = "event::endInstallTypes";
-    type EventInitializationFailed = "event::initializationFailed";
-    interface TypingInstallerResponse {
-        readonly kind: ActionSet | ActionInvalidate | EventTypesRegistry | ActionPackageInstalled | EventBeginInstallTypes | EventEndInstallTypes | EventInitializationFailed;
-    }
-    interface PackageInstalledResponse extends ProjectResponse {
-        readonly kind: ActionPackageInstalled;
-        readonly success: boolean;
-        readonly message: string;
-    }
-    interface InitializationFailedResponse extends TypingInstallerResponse {
-        readonly kind: EventInitializationFailed;
-        readonly message: string;
-    }
-    interface ProjectResponse extends TypingInstallerResponse {
-        readonly projectName: string;
-    }
-    interface SetTypings extends ProjectResponse {
-        readonly typeAcquisition: TypeAcquisition;
-        readonly compilerOptions: CompilerOptions;
-        readonly typings: string[];
-        readonly unresolvedImports: SortedReadonlyArray<string>;
-        readonly kind: ActionSet;
-    }
-    interface InvalidateCachedTypings extends ProjectResponse {
-        readonly kind: ActionInvalidate;
-    }
-    interface InstallTypes extends ProjectResponse {
-        readonly kind: EventBeginInstallTypes | EventEndInstallTypes;
-        readonly eventId: number;
-        readonly typingsInstallerVersion: string;
-        readonly packagesToInstall: ReadonlyArray<string>;
-    }
-    interface BeginInstallTypes extends InstallTypes {
-        readonly kind: EventBeginInstallTypes;
-    }
-    interface EndInstallTypes extends InstallTypes {
-        readonly kind: EventEndInstallTypes;
-        readonly installSuccess: boolean;
-    }
-}
-declare namespace ts.server {
-    const ActionSet: ActionSet;
-    const ActionInvalidate: ActionInvalidate;
-    const ActionPackageInstalled: ActionPackageInstalled;
-    const EventTypesRegistry: EventTypesRegistry;
-    const EventBeginInstallTypes: EventBeginInstallTypes;
-    const EventEndInstallTypes: EventEndInstallTypes;
-    const EventInitializationFailed: EventInitializationFailed;
-    namespace Arguments {
-        const GlobalCacheLocation = "--globalTypingsCacheLocation";
-        const LogFile = "--logFile";
-        const EnableTelemetry = "--enableTelemetry";
-        const TypingSafeListLocation = "--typingSafeListLocation";
-        const TypesMapLocation = "--typesMapLocation";
-        /**
-         * This argument specifies the location of the NPM executable.
-         * typingsInstaller will run the command with `${npmLocation} install ...`.
-         */
-        const NpmLocation = "--npmLocation";
-    }
-    function hasArgument(argumentName: string): boolean;
-    function findArgument(argumentName: string): string | undefined;
 }
 declare namespace ts.server {
     enum LogLevel {
@@ -5494,7 +12077,6 @@ declare namespace ts.server {
         Perf = "Perf"
     }
     namespace Msg {
-        /** @deprecated Only here for backwards-compatibility. Prefer just `Msg`. */
         type Types = Msg;
     }
     function createInstallTypingsRequest(project: Project, typeAcquisition: TypeAcquisition, unresolvedImports: SortedReadonlyArray<string>, cachePath?: string): DiscoverTypings;
@@ -5519,16 +12101,10 @@ declare namespace ts.server {
     function createNormalizedPathMap<T>(): NormalizedPathMap<T>;
     interface ProjectOptions {
         configHasExtendsProperty: boolean;
-        /**
-         * true if config file explicitly listed files
-         */
         configHasFilesProperty: boolean;
         configHasIncludeProperty: boolean;
         configHasExcludeProperty: boolean;
         projectReferences: ReadonlyArray<ProjectReference> | undefined;
-        /**
-         * these fields can be present in the project file
-         */
         files?: string[];
         wildcardDirectories?: Map<WatchDirectoryFlags>;
         compilerOptions?: CompilerOptions;
@@ -5539,47 +12115,86 @@ declare namespace ts.server {
     function makeInferredProjectName(counter: number): string;
     function createSortedArray<T>(): SortedArray<T>;
 }
-/**
- * Declaration module describing the TypeScript Server protocol
- */
+declare namespace ts.server {
+    class ThrottledOperations {
+        private readonly host;
+        private readonly pendingTimeouts;
+        private readonly logger?;
+        constructor(host: ServerHost, logger: Logger);
+        schedule(operationId: string, delay: number, cb: () => void): void;
+        private static run;
+    }
+    class GcTimer {
+        private readonly host;
+        private readonly delay;
+        private readonly logger;
+        private timerId;
+        constructor(host: ServerHost, delay: number, logger: Logger);
+        scheduleCollect(): void;
+        private static run;
+    }
+    function getBaseConfigFileName(configFilePath: NormalizedPath): "tsconfig.json" | "jsconfig.json" | undefined;
+    function removeSorted<T>(array: SortedArray<T>, remove: T, compare: Comparer<T>): void;
+    function toSortedArray(arr: string[]): SortedArray<string>;
+    function toSortedArray<T>(arr: T[], comparer: Comparer<T>): SortedArray<T>;
+    function toDeduplicatedSortedArray(arr: string[]): SortedArray<string>;
+    function indent(str: string): string;
+    function stringifyIndented(json: {}): string;
+}
 declare namespace ts.server.protocol {
     enum CommandTypes {
         JsxClosingTag = "jsxClosingTag",
         Brace = "brace",
+        BraceFull = "brace-full",
         BraceCompletion = "braceCompletion",
         GetSpanOfEnclosingComment = "getSpanOfEnclosingComment",
         Change = "change",
         Close = "close",
         Completions = "completions",
+        CompletionsFull = "completions-full",
         CompletionDetails = "completionEntryDetails",
+        CompletionDetailsFull = "completionEntryDetails-full",
         CompileOnSaveAffectedFileList = "compileOnSaveAffectedFileList",
         CompileOnSaveEmitFile = "compileOnSaveEmitFile",
         Configure = "configure",
         Definition = "definition",
+        DefinitionFull = "definition-full",
         DefinitionAndBoundSpan = "definitionAndBoundSpan",
+        DefinitionAndBoundSpanFull = "definitionAndBoundSpan-full",
         Implementation = "implementation",
+        ImplementationFull = "implementation-full",
         Exit = "exit",
         Format = "format",
         Formatonkey = "formatonkey",
+        FormatFull = "format-full",
+        FormatonkeyFull = "formatonkey-full",
+        FormatRangeFull = "formatRange-full",
         Geterr = "geterr",
         GeterrForProject = "geterrForProject",
         SemanticDiagnosticsSync = "semanticDiagnosticsSync",
         SyntacticDiagnosticsSync = "syntacticDiagnosticsSync",
         SuggestionDiagnosticsSync = "suggestionDiagnosticsSync",
         NavBar = "navbar",
+        NavBarFull = "navbar-full",
         Navto = "navto",
+        NavtoFull = "navto-full",
         NavTree = "navtree",
         NavTreeFull = "navtree-full",
-        /** @deprecated */
         Occurrences = "occurrences",
         DocumentHighlights = "documentHighlights",
+        DocumentHighlightsFull = "documentHighlights-full",
         Open = "open",
         Quickinfo = "quickinfo",
+        QuickinfoFull = "quickinfo-full",
         References = "references",
+        ReferencesFull = "references-full",
         Reload = "reload",
         Rename = "rename",
+        RenameInfoFull = "rename-full",
+        RenameLocationsFull = "renameLocations-full",
         Saveto = "saveto",
         SignatureHelp = "signatureHelp",
+        SignatureHelpFull = "signatureHelp-full",
         Status = "status",
         TypeDefinition = "typeDefinition",
         ProjectInfo = "projectInfo",
@@ -5588,101 +12203,59 @@ declare namespace ts.server.protocol {
         OpenExternalProject = "openExternalProject",
         OpenExternalProjects = "openExternalProjects",
         CloseExternalProject = "closeExternalProject",
+        SynchronizeProjectList = "synchronizeProjectList",
+        ApplyChangedToOpenFiles = "applyChangedToOpenFiles",
+        EncodedSemanticClassificationsFull = "encodedSemanticClassifications-full",
+        Cleanup = "cleanup",
         GetOutliningSpans = "getOutliningSpans",
+        GetOutliningSpansFull = "outliningSpans",
         TodoComments = "todoComments",
         Indentation = "indentation",
         DocCommentTemplate = "docCommentTemplate",
+        CompilerOptionsDiagnosticsFull = "compilerOptionsDiagnostics-full",
+        NameOrDottedNameSpan = "nameOrDottedNameSpan",
+        BreakpointStatement = "breakpointStatement",
         CompilerOptionsForInferredProjects = "compilerOptionsForInferredProjects",
         GetCodeFixes = "getCodeFixes",
+        GetCodeFixesFull = "getCodeFixes-full",
         GetCombinedCodeFix = "getCombinedCodeFix",
+        GetCombinedCodeFixFull = "getCombinedCodeFix-full",
         ApplyCodeActionCommand = "applyCodeActionCommand",
         GetSupportedCodeFixes = "getSupportedCodeFixes",
         GetApplicableRefactors = "getApplicableRefactors",
         GetEditsForRefactor = "getEditsForRefactor",
+        GetEditsForRefactorFull = "getEditsForRefactor-full",
         OrganizeImports = "organizeImports",
-        GetEditsForFileRename = "getEditsForFileRename"
+        OrganizeImportsFull = "organizeImports-full",
+        GetEditsForFileRename = "getEditsForFileRename",
+        GetEditsForFileRenameFull = "getEditsForFileRename-full"
     }
-    /**
-     * A TypeScript Server message
-     */
     interface Message {
-        /**
-         * Sequence number of the message
-         */
         seq: number;
-        /**
-         * One of "request", "response", or "event"
-         */
         type: "request" | "response" | "event";
     }
-    /**
-     * Client-initiated request message
-     */
     interface Request extends Message {
         type: "request";
-        /**
-         * The command to execute
-         */
         command: string;
-        /**
-         * Object containing arguments for the command
-         */
         arguments?: any;
     }
-    /**
-     * Request to reload the project structure for all the opened files
-     */
     interface ReloadProjectsRequest extends Message {
         command: CommandTypes.ReloadProjects;
     }
-    /**
-     * Server-initiated event message
-     */
     interface Event extends Message {
         type: "event";
-        /**
-         * Name of event
-         */
         event: string;
-        /**
-         * Event-specific information
-         */
         body?: any;
     }
-    /**
-     * Response by server to client request message.
-     */
     interface Response extends Message {
         type: "response";
-        /**
-         * Sequence number of the request message.
-         */
         request_seq: number;
-        /**
-         * Outcome of the request.
-         */
         success: boolean;
-        /**
-         * The command requested.
-         */
         command: string;
-        /**
-         * If success === false, this should always be provided.
-         * Otherwise, may (or may not) contain a success message.
-         */
         message?: string;
-        /**
-         * Contains message body if success === true.
-         */
         body?: any;
     }
-    /**
-     * Arguments for FileRequest messages.
-     */
     interface FileRequestArgs {
-        /**
-         * The file for the request (absolute pathname required).
-         */
         file: string;
         projectFileName?: string;
     }
@@ -5690,183 +12263,85 @@ declare namespace ts.server.protocol {
         command: CommandTypes.Status;
     }
     interface StatusResponseBody {
-        /**
-         * The TypeScript version (`ts.version`).
-         */
         version: string;
     }
-    /**
-     * Response to StatusRequest
-     */
     interface StatusResponse extends Response {
         body: StatusResponseBody;
     }
-    /**
-     * Requests a JS Doc comment template for a given position
-     */
     interface DocCommentTemplateRequest extends FileLocationRequest {
         command: CommandTypes.DocCommentTemplate;
     }
-    /**
-     * Response to DocCommentTemplateRequest
-     */
     interface DocCommandTemplateResponse extends Response {
         body?: TextInsertion;
     }
-    /**
-     * A request to get TODO comments from the file
-     */
     interface TodoCommentRequest extends FileRequest {
         command: CommandTypes.TodoComments;
         arguments: TodoCommentRequestArgs;
     }
-    /**
-     * Arguments for TodoCommentRequest request.
-     */
     interface TodoCommentRequestArgs extends FileRequestArgs {
-        /**
-         * Array of target TodoCommentDescriptors that describes TODO comments to be found
-         */
         descriptors: TodoCommentDescriptor[];
     }
-    /**
-     * Response for TodoCommentRequest request.
-     */
     interface TodoCommentsResponse extends Response {
         body?: TodoComment[];
     }
-    /**
-     * A request to determine if the caret is inside a comment.
-     */
     interface SpanOfEnclosingCommentRequest extends FileLocationRequest {
         command: CommandTypes.GetSpanOfEnclosingComment;
         arguments: SpanOfEnclosingCommentRequestArgs;
     }
     interface SpanOfEnclosingCommentRequestArgs extends FileLocationRequestArgs {
-        /**
-         * Requires that the enclosing span be a multi-line comment, or else the request returns undefined.
-         */
         onlyMultiLine: boolean;
     }
-    /**
-     * Request to obtain outlining spans in file.
-     */
     interface OutliningSpansRequest extends FileRequest {
         command: CommandTypes.GetOutliningSpans;
     }
     interface OutliningSpan {
-        /** The span of the document to actually collapse. */
         textSpan: TextSpan;
-        /** The span of the document to display when the user hovers over the collapsed span. */
         hintSpan: TextSpan;
-        /** The text to display in the editor for the collapsed region. */
         bannerText: string;
-        /**
-         * Whether or not this region should be automatically collapsed when
-         * the 'Collapse to Definitions' command is invoked.
-         */
         autoCollapse: boolean;
-        /**
-         * Classification of the contents of the span
-         */
         kind: OutliningSpanKind;
     }
-    /**
-     * Response to OutliningSpansRequest request.
-     */
     interface OutliningSpansResponse extends Response {
         body?: OutliningSpan[];
     }
-    /**
-     * A request to get indentation for a location in file
-     */
+    interface OutliningSpansRequestFull extends FileRequest {
+        command: CommandTypes.GetOutliningSpansFull;
+    }
+    interface OutliningSpansResponseFull extends Response {
+        body?: ts.OutliningSpan[];
+    }
     interface IndentationRequest extends FileLocationRequest {
         command: CommandTypes.Indentation;
         arguments: IndentationRequestArgs;
     }
-    /**
-     * Response for IndentationRequest request.
-     */
     interface IndentationResponse extends Response {
         body?: IndentationResult;
     }
-    /**
-     * Indentation result representing where indentation should be placed
-     */
     interface IndentationResult {
-        /**
-         * The base position in the document that the indent should be relative to
-         */
         position: number;
-        /**
-         * The number of columns the indent should be at relative to the position's column.
-         */
         indentation: number;
     }
-    /**
-     * Arguments for IndentationRequest request.
-     */
     interface IndentationRequestArgs extends FileLocationRequestArgs {
-        /**
-         * An optional set of settings to be used when computing indentation.
-         * If argument is omitted - then it will use settings for file that were previously set via 'configure' request or global settings.
-         */
         options?: EditorSettings;
     }
-    /**
-     * Arguments for ProjectInfoRequest request.
-     */
     interface ProjectInfoRequestArgs extends FileRequestArgs {
-        /**
-         * Indicate if the file name list of the project is needed
-         */
         needFileNameList: boolean;
     }
-    /**
-     * A request to get the project information of the current file.
-     */
     interface ProjectInfoRequest extends Request {
         command: CommandTypes.ProjectInfo;
         arguments: ProjectInfoRequestArgs;
-    }
-    /**
-     * A request to retrieve compiler options diagnostics for a project
-     */
+    }
     interface CompilerOptionsDiagnosticsRequest extends Request {
         arguments: CompilerOptionsDiagnosticsRequestArgs;
     }
-    /**
-     * Arguments for CompilerOptionsDiagnosticsRequest request.
-     */
     interface CompilerOptionsDiagnosticsRequestArgs {
-        /**
-         * Name of the project to retrieve compiler options diagnostics.
-         */
         projectFileName: string;
     }
-    /**
-     * Response message body for "projectInfo" request
-     */
     interface ProjectInfo {
-        /**
-         * For configured project, this is the normalized path of the 'tsconfig.json' file
-         * For inferred project, this is undefined
-         */
         configFileName: string;
-        /**
-         * The list of normalized file name in the project, including 'lib.d.ts'
-         */
         fileNames?: string[];
-        /**
-         * Indicates if the project has a active language service instance
-         */
         languageServiceDisabled?: boolean;
     }
-    /**
-     * Represents diagnostic info that includes location of diagnostic in two forms
-     * - start position and length of the error span
-     * - startLocation and endLocation - a pair of Location objects that store start/end line and offset of the error span.
-     */
     interface DiagnosticWithLinePosition {
         message: string;
         start: number;
@@ -5875,98 +12350,42 @@ declare namespace ts.server.protocol {
         endLocation: Location;
         category: string;
         code: number;
-        /** May store more in future. For now, this will simply be `true` to indicate when a diagnostic is an unused-identifier diagnostic. */
         reportsUnnecessary?: {};
     }
-    /**
-     * Response message for "projectInfo" request
-     */
     interface ProjectInfoResponse extends Response {
         body?: ProjectInfo;
     }
-    /**
-     * Request whose sole parameter is a file name.
-     */
     interface FileRequest extends Request {
         arguments: FileRequestArgs;
     }
-    /**
-     * Instances of this interface specify a location in a source file:
-     * (file, line, character offset), where line and character offset are 1-based.
-     */
     interface FileLocationRequestArgs extends FileRequestArgs {
-        /**
-         * The line number for the request (1-based).
-         */
         line: number;
-        /**
-         * The character offset (on the line) for the request (1-based).
-         */
         offset: number;
+        position?: number;
     }
     type FileLocationOrRangeRequestArgs = FileLocationRequestArgs | FileRangeRequestArgs;
-    /**
-     * Request refactorings at a given position or selection area.
-     */
     interface GetApplicableRefactorsRequest extends Request {
         command: CommandTypes.GetApplicableRefactors;
         arguments: GetApplicableRefactorsRequestArgs;
     }
     type GetApplicableRefactorsRequestArgs = FileLocationOrRangeRequestArgs;
-    /**
-     * Response is a list of available refactorings.
-     * Each refactoring exposes one or more "Actions"; a user selects one action to invoke a refactoring
-     */
     interface GetApplicableRefactorsResponse extends Response {
         body?: ApplicableRefactorInfo[];
     }
-    /**
-     * A set of one or more available refactoring actions, grouped under a parent refactoring.
-     */
     interface ApplicableRefactorInfo {
-        /**
-         * The programmatic name of the refactoring
-         */
         name: string;
-        /**
-         * A description of this refactoring category to show to the user.
-         * If the refactoring gets inlined (see below), this text will not be visible.
-         */
         description: string;
-        /**
-         * Inlineable refactorings can have their actions hoisted out to the top level
-         * of a context menu. Non-inlineanable refactorings should always be shown inside
-         * their parent grouping.
-         *
-         * If not specified, this value is assumed to be 'true'
-         */
         inlineable?: boolean;
         actions: RefactorActionInfo[];
     }
-    /**
-     * Represents a single refactoring action - for example, the "Extract Method..." refactor might
-     * offer several actions, each corresponding to a surround class or closure to extract into.
-     */
     interface RefactorActionInfo {
-        /**
-         * The programmatic name of the refactoring action
-         */
         name: string;
-        /**
-         * A description of this refactoring action to show to the user.
-         * If the parent refactoring is inlined away, this will be the only text shown,
-         * so this description should make sense by itself if the parent is inlineable=true
-         */
         description: string;
     }
     interface GetEditsForRefactorRequest extends Request {
         command: CommandTypes.GetEditsForRefactor;
         arguments: GetEditsForRefactorRequestArgs;
     }
-    /**
-     * Request the edits that a particular refactoring action produces.
-     * Callers must specify the name of the refactor and the name of the action.
-     */
     type GetEditsForRefactorRequestArgs = FileLocationOrRangeRequestArgs & {
         refactor: string;
         action: string;
@@ -5976,19 +12395,9 @@ declare namespace ts.server.protocol {
     }
     interface RefactorEditInfo {
         edits: FileCodeEdits[];
-        /**
-         * An optional location where the editor should start a rename operation once
-         * the refactoring edits have been applied
-         */
         renameLocation?: Location;
         renameFilename?: string;
     }
-    /**
-     * Organize imports by:
-     *   1) Removing unused imports
-     *   2) Coalescing imports from the same module
-     *   3) Sorting imports
-     */
     interface OrganizeImportsRequest extends Request {
         command: CommandTypes.OrganizeImports;
         arguments: OrganizeImportsRequestArgs;
@@ -6011,9 +12420,6 @@ declare namespace ts.server.protocol {
     interface GetEditsForFileRenameResponse extends Response {
         edits: ReadonlyArray<FileCodeEdits>;
     }
-    /**
-     * Request for the available codefixes at a specific position.
-     */
     interface CodeFixRequest extends Request {
         command: CommandTypes.GetCodeFixes;
         arguments: CodeFixRequestArgs;
@@ -6032,30 +12438,14 @@ declare namespace ts.server.protocol {
     interface ApplyCodeActionCommandResponse extends Response {
     }
     interface FileRangeRequestArgs extends FileRequestArgs {
-        /**
-         * The line number for the request (1-based).
-         */
         startLine: number;
-        /**
-         * The character offset (on the line) for the request (1-based).
-         */
         startOffset: number;
-        /**
-         * The line number for the request (1-based).
-         */
+        startPosition?: number;
         endLine: number;
-        /**
-         * The character offset (on the line) for the request (1-based).
-         */
         endOffset: number;
+        endPosition?: number;
     }
-    /**
-     * Instances of this interface specify errorcodes on a specific location in a sourcefile.
-     */
     interface CodeFixRequestArgs extends FileRangeRequestArgs {
-        /**
-         * Errorcodes we want to get the fixes for.
-         */
         errorCodes?: ReadonlyArray<number>;
     }
     interface GetCombinedCodeFixRequestArgs {
@@ -6067,151 +12457,71 @@ declare namespace ts.server.protocol {
         args: FileRequestArgs;
     }
     interface ApplyCodeActionCommandRequestArgs {
-        /** May also be an array of commands. */
         command: {};
     }
-    /**
-     * Response for GetCodeFixes request.
-     */
     interface GetCodeFixesResponse extends Response {
         body?: CodeAction[];
     }
-    /**
-     * A request whose arguments specify a file location (file, line, col).
-     */
     interface FileLocationRequest extends FileRequest {
         arguments: FileLocationRequestArgs;
     }
-    /**
-     * A request to get codes of supported code fixes.
-     */
     interface GetSupportedCodeFixesRequest extends Request {
         command: CommandTypes.GetSupportedCodeFixes;
     }
-    /**
-     * A response for GetSupportedCodeFixesRequest request.
-     */
     interface GetSupportedCodeFixesResponse extends Response {
-        /**
-         * List of error codes supported by the server.
-         */
         body?: string[];
     }
-    /**
-     * Arguments for EncodedSemanticClassificationsRequest request.
-     */
+    interface EncodedSemanticClassificationsRequest extends FileRequest {
+        arguments: EncodedSemanticClassificationsRequestArgs;
+    }
     interface EncodedSemanticClassificationsRequestArgs extends FileRequestArgs {
-        /**
-         * Start position of the span.
-         */
         start: number;
-        /**
-         * Length of the span.
-         */
         length: number;
     }
-    /**
-     * Arguments in document highlight request; include: filesToSearch, file,
-     * line, offset.
-     */
     interface DocumentHighlightsRequestArgs extends FileLocationRequestArgs {
-        /**
-         * List of files to search for document highlights.
-         */
         filesToSearch: string[];
     }
-    /**
-     * Go to definition request; value of command field is
-     * "definition". Return response giving the file locations that
-     * define the symbol found in file at location line, col.
-     */
     interface DefinitionRequest extends FileLocationRequest {
         command: CommandTypes.Definition;
     }
-    /**
-     * Go to type request; value of command field is
-     * "typeDefinition". Return response giving the file locations that
-     * define the type for the symbol found in file at location line, col.
-     */
     interface TypeDefinitionRequest extends FileLocationRequest {
         command: CommandTypes.TypeDefinition;
     }
-    /**
-     * Go to implementation request; value of command field is
-     * "implementation". Return response giving the file locations that
-     * implement the symbol found in file at location line, col.
-     */
     interface ImplementationRequest extends FileLocationRequest {
         command: CommandTypes.Implementation;
     }
-    /**
-     * Location in source code expressed as (one-based) line and (one-based) column offset.
-     */
     interface Location {
         line: number;
         offset: number;
     }
-    /**
-     * Object found in response messages defining a span of text in source code.
-     */
     interface TextSpan {
-        /**
-         * First character of the definition.
-         */
         start: Location;
-        /**
-         * One character past last character of the definition.
-         */
         end: Location;
     }
-    /**
-     * Object found in response messages defining a span of text in a specific source file.
-     */
     interface FileSpan extends TextSpan {
-        /**
-         * File containing text span.
-         */
         file: string;
     }
     interface DefinitionInfoAndBoundSpan {
         definitions: ReadonlyArray<FileSpan>;
         textSpan: TextSpan;
     }
-    /**
-     * Definition response message.  Gives text range for definition.
-     */
     interface DefinitionResponse extends Response {
         body?: FileSpan[];
     }
     interface DefinitionInfoAndBoundSpanReponse extends Response {
         body?: DefinitionInfoAndBoundSpan;
     }
-    /**
-     * Definition response message.  Gives text range for definition.
-     */
     interface TypeDefinitionResponse extends Response {
         body?: FileSpan[];
     }
-    /**
-     * Implementation response message.  Gives text range for implementations.
-     */
     interface ImplementationResponse extends Response {
         body?: FileSpan[];
     }
-    /**
-     * Request to get brace completion for a location in the file.
-     */
     interface BraceCompletionRequest extends FileLocationRequest {
         command: CommandTypes.BraceCompletion;
         arguments: BraceCompletionRequestArgs;
     }
-    /**
-     * Argument for BraceCompletionRequest request.
-     */
     interface BraceCompletionRequestArgs extends FileLocationRequestArgs {
-        /**
-         * Kind of opening brace
-         */
         openingBrace: string;
     }
     interface JsxClosingTagRequest extends FileLocationRequest {
@@ -6223,596 +12533,240 @@ declare namespace ts.server.protocol {
     interface JsxClosingTagResponse extends Response {
         readonly body: TextInsertion;
     }
-    /**
-     * @deprecated
-     * Get occurrences request; value of command field is
-     * "occurrences". Return response giving spans that are relevant
-     * in the file at a given line and column.
-     */
     interface OccurrencesRequest extends FileLocationRequest {
         command: CommandTypes.Occurrences;
     }
-    /** @deprecated */
     interface OccurrencesResponseItem extends FileSpan {
-        /**
-         * True if the occurrence is a write location, false otherwise.
-         */
         isWriteAccess: boolean;
-        /**
-         * True if the occurrence is in a string, undefined otherwise;
-         */
         isInString?: true;
     }
-    /** @deprecated */
     interface OccurrencesResponse extends Response {
         body?: OccurrencesResponseItem[];
     }
-    /**
-     * Get document highlights request; value of command field is
-     * "documentHighlights". Return response giving spans that are relevant
-     * in the file at a given line and column.
-     */
     interface DocumentHighlightsRequest extends FileLocationRequest {
         command: CommandTypes.DocumentHighlights;
         arguments: DocumentHighlightsRequestArgs;
     }
-    /**
-     * Span augmented with extra information that denotes the kind of the highlighting to be used for span.
-     */
     interface HighlightSpan extends TextSpan {
         kind: HighlightSpanKind;
     }
-    /**
-     * Represents a set of highligh spans for a give name
-     */
     interface DocumentHighlightsItem {
-        /**
-         * File containing highlight spans.
-         */
         file: string;
-        /**
-         * Spans to highlight in file.
-         */
         highlightSpans: HighlightSpan[];
     }
-    /**
-     * Response for a DocumentHighlightsRequest request.
-     */
     interface DocumentHighlightsResponse extends Response {
         body?: DocumentHighlightsItem[];
     }
-    /**
-     * Find references request; value of command field is
-     * "references". Return response giving the file locations that
-     * reference the symbol found in file at location line, col.
-     */
     interface ReferencesRequest extends FileLocationRequest {
         command: CommandTypes.References;
     }
     interface ReferencesResponseItem extends FileSpan {
-        /** Text of line containing the reference.  Including this
-         *  with the response avoids latency of editor loading files
-         * to show text of reference line (the server already has
-         * loaded the referencing files).
-         */
         lineText: string;
-        /**
-         * True if reference is a write location, false otherwise.
-         */
         isWriteAccess: boolean;
-        /**
-         * True if reference is a definition, false otherwise.
-         */
         isDefinition: boolean;
     }
-    /**
-     * The body of a "references" response message.
-     */
     interface ReferencesResponseBody {
-        /**
-         * The file locations referencing the symbol.
-         */
         refs: ReferencesResponseItem[];
-        /**
-         * The name of the symbol.
-         */
         symbolName: string;
-        /**
-         * The start character offset of the symbol (on the line provided by the references request).
-         */
         symbolStartOffset: number;
-        /**
-         * The full display name of the symbol.
-         */
         symbolDisplayString: string;
     }
-    /**
-     * Response to "references" request.
-     */
     interface ReferencesResponse extends Response {
         body?: ReferencesResponseBody;
     }
-    /**
-     * Argument for RenameRequest request.
-     */
     interface RenameRequestArgs extends FileLocationRequestArgs {
-        /**
-         * Should text at specified location be found/changed in comments?
-         */
         findInComments?: boolean;
-        /**
-         * Should text at specified location be found/changed in strings?
-         */
         findInStrings?: boolean;
     }
-    /**
-     * Rename request; value of command field is "rename". Return
-     * response giving the file locations that reference the symbol
-     * found in file at location line, col. Also return full display
-     * name of the symbol so that client can print it unambiguously.
-     */
     interface RenameRequest extends FileLocationRequest {
         command: CommandTypes.Rename;
         arguments: RenameRequestArgs;
     }
-    /**
-     * Information about the item to be renamed.
-     */
     interface RenameInfo {
-        /**
-         * True if item can be renamed.
-         */
         canRename: boolean;
-        /**
-         * Error message if item can not be renamed.
-         */
         localizedErrorMessage?: string;
-        /**
-         * Display name of the item to be renamed.
-         */
         displayName: string;
-        /**
-         * Full display name of item to be renamed.
-         */
         fullDisplayName: string;
-        /**
-         * The items's kind (such as 'className' or 'parameterName' or plain 'text').
-         */
         kind: ScriptElementKind;
-        /**
-         * Optional modifiers for the kind (such as 'public').
-         */
         kindModifiers: string;
     }
-    /**
-     *  A group of text spans, all in 'file'.
-     */
     interface SpanGroup {
-        /** The file to which the spans apply */
         file: string;
-        /** The text spans in this group */
         locs: TextSpan[];
     }
     interface RenameResponseBody {
-        /**
-         * Information about the item to be renamed.
-         */
         info: RenameInfo;
-        /**
-         * An array of span groups (one per file) that refer to the item to be renamed.
-         */
         locs: ReadonlyArray<SpanGroup>;
     }
-    /**
-     * Rename response message.
-     */
     interface RenameResponse extends Response {
         body?: RenameResponseBody;
     }
-    /**
-     * Represents a file in external project.
-     * External project is project whose set of files, compilation options and open\close state
-     * is maintained by the client (i.e. if all this data come from .csproj file in Visual Studio).
-     * External project will exist even if all files in it are closed and should be closed explicitly.
-     * If external project includes one or more tsconfig.json/jsconfig.json files then tsserver will
-     * create configured project for every config file but will maintain a link that these projects were created
-     * as a result of opening external project so they should be removed once external project is closed.
-     */
     interface ExternalFile {
-        /**
-         * Name of file file
-         */
         fileName: string;
-        /**
-         * Script kind of the file
-         */
         scriptKind?: ScriptKindName | ts.ScriptKind;
-        /**
-         * Whether file has mixed content (i.e. .cshtml file that combines html markup with C#/JavaScript)
-         */
         hasMixedContent?: boolean;
-        /**
-         * Content of the file
-         */
         content?: string;
     }
-    /**
-     * Represent an external project
-     */
     interface ExternalProject {
-        /**
-         * Project name
-         */
         projectFileName: string;
-        /**
-         * List of root files in project
-         */
         rootFiles: ExternalFile[];
-        /**
-         * Compiler options for the project
-         */
         options: ExternalProjectCompilerOptions;
-        /**
-         * @deprecated typingOptions. Use typeAcquisition instead
-         */
         typingOptions?: TypeAcquisition;
-        /**
-         * Explicitly specified type acquisition for the project
-         */
         typeAcquisition?: TypeAcquisition;
     }
     interface CompileOnSaveMixin {
-        /**
-         * If compile on save is enabled for the project
-         */
         compileOnSave?: boolean;
     }
-    /**
-     * For external projects, some of the project settings are sent together with
-     * compiler settings.
-     */
     type ExternalProjectCompilerOptions = CompilerOptions & CompileOnSaveMixin;
-    /**
-     * Represents a set of changes that happen in project
-     */
+    interface ProjectVersionInfo {
+        projectName: string;
+        isInferred: boolean;
+        version: number;
+        options: ts.CompilerOptions;
+        languageServiceDisabled: boolean;
+        lastFileExceededProgramSize?: string;
+    }
     interface ProjectChanges {
-        /**
-         * List of added files
-         */
         added: string[];
-        /**
-         * List of removed files
-         */
         removed: string[];
-        /**
-         * List of updated files
-         */
         updated: string[];
     }
-    /**
-     * Information found in a configure request.
-     */
+    interface ProjectFiles {
+        info?: ProjectVersionInfo;
+        files?: string[];
+        changes?: ProjectChanges;
+    }
+    interface ProjectFilesWithDiagnostics extends ProjectFiles {
+        projectErrors: DiagnosticWithLinePosition[];
+    }
+    interface ChangedOpenFile {
+        fileName: string;
+        changes: ts.TextChange[];
+    }
     interface ConfigureRequestArguments {
-        /**
-         * Information about the host, for example 'Emacs 24.4' or
-         * 'Sublime Text version 3075'
-         */
         hostInfo?: string;
-        /**
-         * If present, tab settings apply only to this file.
-         */
         file?: string;
-        /**
-         * The format options to use during formatting and other code editing features.
-         */
         formatOptions?: FormatCodeSettings;
         preferences?: UserPreferences;
-        /**
-         * The host's additional supported .js file extensions
-         */
         extraFileExtensions?: FileExtensionInfo[];
-    }
-    /**
-     *  Configure request; value of command field is "configure".  Specifies
-     *  host information, such as host type, tab size, and indent size.
-     */
+    }
     interface ConfigureRequest extends Request {
         command: CommandTypes.Configure;
         arguments: ConfigureRequestArguments;
     }
-    /**
-     * Response to "configure" request.  This is just an acknowledgement, so
-     * no body field is required.
-     */
     interface ConfigureResponse extends Response {
     }
-    /**
-     *  Information found in an "open" request.
-     */
     interface OpenRequestArgs extends FileRequestArgs {
-        /**
-         * Used when a version of the file content is known to be more up to date than the one on disk.
-         * Then the known content will be used upon opening instead of the disk copy
-         */
         fileContent?: string;
-        /**
-         * Used to specify the script kind of the file explicitly. It could be one of the following:
-         *      "TS", "JS", "TSX", "JSX"
-         */
         scriptKindName?: ScriptKindName;
-        /**
-         * Used to limit the searching for project config file. If given the searching will stop at this
-         * root path; otherwise it will go all the way up to the dist root path.
-         */
         projectRootPath?: string;
     }
     type ScriptKindName = "TS" | "JS" | "TSX" | "JSX";
-    /**
-     * Open request; value of command field is "open". Notify the
-     * server that the client has file open.  The server will not
-     * monitor the filesystem for changes in this file and will assume
-     * that the client is updating the server (using the change and/or
-     * reload messages) when the file changes. Server does not currently
-     * send a response to an open request.
-     */
     interface OpenRequest extends Request {
         command: CommandTypes.Open;
         arguments: OpenRequestArgs;
     }
-    /**
-     * Request to open or update external project
-     */
     interface OpenExternalProjectRequest extends Request {
         command: CommandTypes.OpenExternalProject;
         arguments: OpenExternalProjectArgs;
     }
-    /**
-     * Arguments to OpenExternalProjectRequest request
-     */
     type OpenExternalProjectArgs = ExternalProject;
-    /**
-     * Request to open multiple external projects
-     */
     interface OpenExternalProjectsRequest extends Request {
         command: CommandTypes.OpenExternalProjects;
         arguments: OpenExternalProjectsArgs;
     }
-    /**
-     * Arguments to OpenExternalProjectsRequest
-     */
     interface OpenExternalProjectsArgs {
-        /**
-         * List of external projects to open or update
-         */
         projects: ExternalProject[];
     }
-    /**
-     * Response to OpenExternalProjectRequest request. This is just an acknowledgement, so
-     * no body field is required.
-     */
     interface OpenExternalProjectResponse extends Response {
     }
-    /**
-     * Response to OpenExternalProjectsRequest request. This is just an acknowledgement, so
-     * no body field is required.
-     */
     interface OpenExternalProjectsResponse extends Response {
     }
-    /**
-     * Request to close external project.
-     */
     interface CloseExternalProjectRequest extends Request {
         command: CommandTypes.CloseExternalProject;
         arguments: CloseExternalProjectRequestArgs;
     }
-    /**
-     * Arguments to CloseExternalProjectRequest request
-     */
     interface CloseExternalProjectRequestArgs {
-        /**
-         * Name of the project to close
-         */
         projectFileName: string;
     }
-    /**
-     * Response to CloseExternalProjectRequest request. This is just an acknowledgement, so
-     * no body field is required.
-     */
     interface CloseExternalProjectResponse extends Response {
     }
-    /**
-     * Request to set compiler options for inferred projects.
-     * External projects are opened / closed explicitly.
-     * Configured projects are opened when user opens loose file that has 'tsconfig.json' or 'jsconfig.json' anywhere in one of containing folders.
-     * This configuration file will be used to obtain a list of files and configuration settings for the project.
-     * Inferred projects are created when user opens a loose file that is not the part of external project
-     * or configured project and will contain only open file and transitive closure of referenced files if 'useOneInferredProject' is false,
-     * or all open loose files and its transitive closure of referenced files if 'useOneInferredProject' is true.
-     */
+    interface SynchronizeProjectListRequest extends Request {
+        arguments: SynchronizeProjectListRequestArgs;
+    }
+    interface SynchronizeProjectListRequestArgs {
+        knownProjects: protocol.ProjectVersionInfo[];
+    }
+    interface ApplyChangedToOpenFilesRequest extends Request {
+        arguments: ApplyChangedToOpenFilesRequestArgs;
+    }
+    interface ApplyChangedToOpenFilesRequestArgs {
+        openFiles?: ExternalFile[];
+        changedFiles?: ChangedOpenFile[];
+        closedFiles?: string[];
+    }
     interface SetCompilerOptionsForInferredProjectsRequest extends Request {
         command: CommandTypes.CompilerOptionsForInferredProjects;
         arguments: SetCompilerOptionsForInferredProjectsArgs;
     }
-    /**
-     * Argument for SetCompilerOptionsForInferredProjectsRequest request.
-     */
     interface SetCompilerOptionsForInferredProjectsArgs {
-        /**
-         * Compiler options to be used with inferred projects.
-         */
         options: ExternalProjectCompilerOptions;
-        /**
-         * Specifies the project root path used to scope compiler options.
-         * It is an error to provide this property if the server has not been started with
-         * `useInferredProjectPerProjectRoot` enabled.
-         */
         projectRootPath?: string;
     }
-    /**
-     * Response to SetCompilerOptionsForInferredProjectsResponse request. This is just an acknowledgement, so
-     * no body field is required.
-     */
     interface SetCompilerOptionsForInferredProjectsResponse extends Response {
     }
-    /**
-     *  Exit request; value of command field is "exit".  Ask the server process
-     *  to exit.
-     */
     interface ExitRequest extends Request {
         command: CommandTypes.Exit;
     }
-    /**
-     * Close request; value of command field is "close". Notify the
-     * server that the client has closed a previously open file.  If
-     * file is still referenced by open files, the server will resume
-     * monitoring the filesystem for changes to file.  Server does not
-     * currently send a response to a close request.
-     */
     interface CloseRequest extends FileRequest {
         command: CommandTypes.Close;
     }
-    /**
-     * Request to obtain the list of files that should be regenerated if target file is recompiled.
-     * NOTE: this us query-only operation and does not generate any output on disk.
-     */
     interface CompileOnSaveAffectedFileListRequest extends FileRequest {
         command: CommandTypes.CompileOnSaveAffectedFileList;
     }
-    /**
-     * Contains a list of files that should be regenerated in a project
-     */
     interface CompileOnSaveAffectedFileListSingleProject {
-        /**
-         * Project name
-         */
         projectFileName: string;
-        /**
-         * List of files names that should be recompiled
-         */
         fileNames: string[];
-        /**
-         * true if project uses outFile or out compiler option
-         */
         projectUsesOutFile: boolean;
     }
-    /**
-     * Response for CompileOnSaveAffectedFileListRequest request;
-     */
     interface CompileOnSaveAffectedFileListResponse extends Response {
         body: CompileOnSaveAffectedFileListSingleProject[];
     }
-    /**
-     * Request to recompile the file. All generated outputs (.js, .d.ts or .js.map files) is written on disk.
-     */
     interface CompileOnSaveEmitFileRequest extends FileRequest {
         command: CommandTypes.CompileOnSaveEmitFile;
         arguments: CompileOnSaveEmitFileRequestArgs;
     }
-    /**
-     * Arguments for CompileOnSaveEmitFileRequest
-     */
     interface CompileOnSaveEmitFileRequestArgs extends FileRequestArgs {
-        /**
-         * if true - then file should be recompiled even if it does not have any changes.
-         */
         forced?: boolean;
     }
-    /**
-     * Quickinfo request; value of command field is
-     * "quickinfo". Return response giving a quick type and
-     * documentation string for the symbol found in file at location
-     * line, col.
-     */
     interface QuickInfoRequest extends FileLocationRequest {
         command: CommandTypes.Quickinfo;
     }
-    /**
-     * Body of QuickInfoResponse.
-     */
     interface QuickInfoResponseBody {
-        /**
-         * The symbol's kind (such as 'className' or 'parameterName' or plain 'text').
-         */
         kind: ScriptElementKind;
-        /**
-         * Optional modifiers for the kind (such as 'public').
-         */
         kindModifiers: string;
-        /**
-         * Starting file location of symbol.
-         */
         start: Location;
-        /**
-         * One past last character of symbol.
-         */
         end: Location;
-        /**
-         * Type and kind of symbol.
-         */
         displayString: string;
-        /**
-         * Documentation associated with symbol.
-         */
         documentation: string;
-        /**
-         * JSDoc tags associated with symbol.
-         */
         tags: JSDocTagInfo[];
     }
-    /**
-     * Quickinfo response message.
-     */
     interface QuickInfoResponse extends Response {
         body?: QuickInfoResponseBody;
     }
-    /**
-     * Arguments for format messages.
-     */
     interface FormatRequestArgs extends FileLocationRequestArgs {
-        /**
-         * Last line of range for which to format text in file.
-         */
         endLine: number;
-        /**
-         * Character offset on last line of range for which to format text in file.
-         */
         endOffset: number;
-        /**
-         * Format options to be used.
-         */
+        endPosition?: number;
         options?: FormatCodeSettings;
     }
-    /**
-     * Format request; value of command field is "format".  Return
-     * response giving zero or more edit instructions.  The edit
-     * instructions will be sorted in file order.  Applying the edit
-     * instructions in reverse to file will result in correctly
-     * reformatted text.
-     */
     interface FormatRequest extends FileLocationRequest {
         command: CommandTypes.Format;
         arguments: FormatRequestArgs;
     }
-    /**
-     * Object found in response messages defining an editing
-     * instruction for a span of text in source code.  The effect of
-     * this instruction is to replace the text starting at start and
-     * ending one character before end with newText. For an insertion,
-     * the text span is empty.  For a deletion, newText is empty.
-     */
     interface CodeEdit {
-        /**
-         * First character of the text span to edit.
-         */
         start: Location;
-        /**
-         * One character past last character of the text span to edit.
-         */
         end: Location;
-        /**
-         * Replace the span defined above with this string (may be
-         * the empty string).
-         */
         newText: string;
     }
     interface FileCodeEdits {
@@ -6820,15 +12774,11 @@ declare namespace ts.server.protocol {
         textChanges: CodeEdit[];
     }
     interface CodeFixResponse extends Response {
-        /** The code actions that are available */
         body?: CodeFixAction[];
     }
     interface CodeAction {
-        /** Description of the code action to display in the UI of the editor */
         description: string;
-        /** Text changes to apply to each file as part of the code action */
         changes: FileCodeEdits[];
-        /** A command is an opaque object that should be passed to `ApplyCodeActionCommandRequestArgs` without modification.  */
         commands?: {}[];
     }
     interface CombinedCodeActions {
@@ -6836,193 +12786,66 @@ declare namespace ts.server.protocol {
         commands?: ReadonlyArray<{}>;
     }
     interface CodeFixAction extends CodeAction {
-        /** Short name to identify the fix, for use by telemetry. */
         fixName: string;
-        /**
-         * If present, one may call 'getCombinedCodeFix' with this fixId.
-         * This may be omitted to indicate that the code fix can't be applied in a group.
-         */
         fixId?: {};
-        /** Should be present if and only if 'fixId' is. */
         fixAllDescription?: string;
     }
-    /**
-     * Format and format on key response message.
-     */
     interface FormatResponse extends Response {
         body?: CodeEdit[];
     }
-    /**
-     * Arguments for format on key messages.
-     */
     interface FormatOnKeyRequestArgs extends FileLocationRequestArgs {
-        /**
-         * Key pressed (';', '\n', or '}').
-         */
         key: string;
         options?: FormatCodeSettings;
     }
-    /**
-     * Format on key request; value of command field is
-     * "formatonkey". Given file location and key typed (as string),
-     * return response giving zero or more edit instructions.  The
-     * edit instructions will be sorted in file order.  Applying the
-     * edit instructions in reverse to file will result in correctly
-     * reformatted text.
-     */
     interface FormatOnKeyRequest extends FileLocationRequest {
         command: CommandTypes.Formatonkey;
         arguments: FormatOnKeyRequestArgs;
     }
     type CompletionsTriggerCharacter = "." | '"' | "'" | "`" | "/" | "@" | "<";
-    /**
-     * Arguments for completions messages.
-     */
     interface CompletionsRequestArgs extends FileLocationRequestArgs {
-        /**
-         * Optional prefix to apply to possible completions.
-         */
         prefix?: string;
         triggerCharacter?: CompletionsTriggerCharacter;
-        /**
-         * @deprecated Use UserPreferences.includeCompletionsForModuleExports
-         */
         includeExternalModuleExports?: boolean;
-        /**
-         * @deprecated Use UserPreferences.includeCompletionsWithInsertText
-         */
         includeInsertTextCompletions?: boolean;
     }
-    /**
-     * Completions request; value of command field is "completions".
-     * Given a file location (file, line, col) and a prefix (which may
-     * be the empty string), return the possible completions that
-     * begin with prefix.
-     */
     interface CompletionsRequest extends FileLocationRequest {
         command: CommandTypes.Completions;
         arguments: CompletionsRequestArgs;
     }
-    /**
-     * Arguments for completion details request.
-     */
     interface CompletionDetailsRequestArgs extends FileLocationRequestArgs {
-        /**
-         * Names of one or more entries for which to obtain details.
-         */
         entryNames: (string | CompletionEntryIdentifier)[];
     }
     interface CompletionEntryIdentifier {
         name: string;
         source?: string;
     }
-    /**
-     * Completion entry details request; value of command field is
-     * "completionEntryDetails".  Given a file location (file, line,
-     * col) and an array of completion entry names return more
-     * detailed information for each completion entry.
-     */
     interface CompletionDetailsRequest extends FileLocationRequest {
         command: CommandTypes.CompletionDetails;
         arguments: CompletionDetailsRequestArgs;
     }
-    /**
-     * Part of a symbol description.
-     */
     interface SymbolDisplayPart {
-        /**
-         * Text of an item describing the symbol.
-         */
         text: string;
-        /**
-         * The symbol's kind (such as 'className' or 'parameterName' or plain 'text').
-         */
         kind: string;
     }
-    /**
-     * An item found in a completion response.
-     */
     interface CompletionEntry {
-        /**
-         * The symbol's name.
-         */
         name: string;
-        /**
-         * The symbol's kind (such as 'className' or 'parameterName').
-         */
         kind: ScriptElementKind;
-        /**
-         * Optional modifiers for the kind (such as 'public').
-         */
         kindModifiers?: string;
-        /**
-         * A string that is used for comparing completion items so that they can be ordered.  This
-         * is often the same as the name but may be different in certain circumstances.
-         */
         sortText: string;
-        /**
-         * Text to insert instead of `name`.
-         * This is used to support bracketed completions; If `name` might be "a-b" but `insertText` would be `["a-b"]`,
-         * coupled with `replacementSpan` to replace a dotted access with a bracket access.
-         */
         insertText?: string;
-        /**
-         * An optional span that indicates the text to be replaced by this completion item.
-         * If present, this span should be used instead of the default one.
-         * It will be set if the required span differs from the one generated by the default replacement behavior.
-         */
         replacementSpan?: TextSpan;
-        /**
-         * Indicates whether commiting this completion entry will require additional code actions to be
-         * made to avoid errors. The CompletionEntryDetails will have these actions.
-         */
         hasAction?: true;
-        /**
-         * Identifier (not necessarily human-readable) identifying where this completion came from.
-         */
         source?: string;
-        /**
-         * If true, this completion should be highlighted as recommended. There will only be one of these.
-         * This will be set when we know the user should write an expression with a certain type and that type is an enum or constructable class.
-         * Then either that enum/class or a namespace containing it will be the recommended symbol.
-         */
         isRecommended?: true;
     }
-    /**
-     * Additional completion entry details, available on demand
-     */
     interface CompletionEntryDetails {
-        /**
-         * The symbol's name.
-         */
         name: string;
-        /**
-         * The symbol's kind (such as 'className' or 'parameterName').
-         */
         kind: ScriptElementKind;
-        /**
-         * Optional modifiers for the kind (such as 'public').
-         */
         kindModifiers: string;
-        /**
-         * Display parts of the symbol (similar to quick info).
-         */
         displayParts: SymbolDisplayPart[];
-        /**
-         * Documentation strings for the symbol.
-         */
         documentation?: SymbolDisplayPart[];
-        /**
-         * JSDoc tags for the symbol.
-         */
         tags?: JSDocTagInfo[];
-        /**
-         * The associated code actions for this entry
-         */
         codeActions?: CodeAction[];
-        /**
-         * Human-readable description of the `source` from the CompletionEntry.
-         */
         source?: SymbolDisplayPart[];
     }
     interface CompletionsResponse extends Response {
@@ -7031,108 +12854,37 @@ declare namespace ts.server.protocol {
     interface CompletionDetailsResponse extends Response {
         body?: CompletionEntryDetails[];
     }
-    /**
-     * Signature help information for a single parameter
-     */
     interface SignatureHelpParameter {
-        /**
-         * The parameter's name
-         */
         name: string;
-        /**
-         * Documentation of the parameter.
-         */
         documentation: SymbolDisplayPart[];
-        /**
-         * Display parts of the parameter.
-         */
         displayParts: SymbolDisplayPart[];
-        /**
-         * Whether the parameter is optional or not.
-         */
         isOptional: boolean;
     }
-    /**
-     * Represents a single signature to show in signature help.
-     */
     interface SignatureHelpItem {
-        /**
-         * Whether the signature accepts a variable number of arguments.
-         */
         isVariadic: boolean;
-        /**
-         * The prefix display parts.
-         */
         prefixDisplayParts: SymbolDisplayPart[];
-        /**
-         * The suffix display parts.
-         */
         suffixDisplayParts: SymbolDisplayPart[];
-        /**
-         * The separator display parts.
-         */
         separatorDisplayParts: SymbolDisplayPart[];
-        /**
-         * The signature helps items for the parameters.
-         */
         parameters: SignatureHelpParameter[];
-        /**
-         * The signature's documentation
-         */
         documentation: SymbolDisplayPart[];
-        /**
-         * The signature's JSDoc tags
-         */
         tags: JSDocTagInfo[];
     }
-    /**
-     * Signature help items found in the response of a signature help request.
-     */
     interface SignatureHelpItems {
-        /**
-         * The signature help items.
-         */
         items: SignatureHelpItem[];
-        /**
-         * The span for which signature help should appear on a signature
-         */
         applicableSpan: TextSpan;
-        /**
-         * The item selected in the set of available help items.
-         */
         selectedItemIndex: number;
-        /**
-         * The argument selected in the set of parameters.
-         */
         argumentIndex: number;
-        /**
-         * The argument count
-         */
         argumentCount: number;
     }
-    /**
-     * Arguments of a signature help request.
-     */
     interface SignatureHelpRequestArgs extends FileLocationRequestArgs {
     }
-    /**
-     * Signature help request; value of command field is "signatureHelp".
-     * Given a file location (file, line, col), return the signature
-     * help.
-     */
     interface SignatureHelpRequest extends FileLocationRequest {
         command: CommandTypes.SignatureHelp;
         arguments: SignatureHelpRequestArgs;
     }
-    /**
-     * Response object for a SignatureHelpRequest.
-     */
     interface SignatureHelpResponse extends Response {
         body?: SignatureHelpItems;
     }
-    /**
-     * Synchronous request for semantic diagnostics of one file.
-     */
     interface SemanticDiagnosticsSyncRequest extends FileRequest {
         command: CommandTypes.SemanticDiagnosticsSync;
         arguments: SemanticDiagnosticsSyncRequestArgs;
@@ -7140,9 +12892,6 @@ declare namespace ts.server.protocol {
     interface SemanticDiagnosticsSyncRequestArgs extends FileRequestArgs {
         includeLinePosition?: boolean;
     }
-    /**
-     * Response object for synchronous sematic diagnostics request.
-     */
     interface SemanticDiagnosticsSyncResponse extends Response {
         body?: Diagnostic[] | DiagnosticWithLinePosition[];
     }
@@ -7152,9 +12901,6 @@ declare namespace ts.server.protocol {
     }
     type SuggestionDiagnosticsSyncRequestArgs = SemanticDiagnosticsSyncRequestArgs;
     type SuggestionDiagnosticsSyncResponse = SemanticDiagnosticsSyncResponse;
-    /**
-     * Synchronous request for syntactic diagnostics of one file.
-     */
     interface SyntacticDiagnosticsSyncRequest extends FileRequest {
         command: CommandTypes.SyntacticDiagnosticsSync;
         arguments: SyntacticDiagnosticsSyncRequestArgs;
@@ -7162,68 +12908,26 @@ declare namespace ts.server.protocol {
     interface SyntacticDiagnosticsSyncRequestArgs extends FileRequestArgs {
         includeLinePosition?: boolean;
     }
-    /**
-     * Response object for synchronous syntactic diagnostics request.
-     */
     interface SyntacticDiagnosticsSyncResponse extends Response {
         body?: Diagnostic[] | DiagnosticWithLinePosition[];
     }
-    /**
-     * Arguments for GeterrForProject request.
-     */
     interface GeterrForProjectRequestArgs {
-        /**
-         * the file requesting project error list
-         */
         file: string;
-        /**
-         * Delay in milliseconds to wait before starting to compute
-         * errors for the files in the file list
-         */
         delay: number;
     }
-    /**
-     * GeterrForProjectRequest request; value of command field is
-     * "geterrForProject". It works similarly with 'Geterr', only
-     * it request for every file in this project.
-     */
     interface GeterrForProjectRequest extends Request {
         command: CommandTypes.GeterrForProject;
         arguments: GeterrForProjectRequestArgs;
     }
-    /**
-     * Arguments for geterr messages.
-     */
     interface GeterrRequestArgs {
-        /**
-         * List of file names for which to compute compiler errors.
-         * The files will be checked in list order.
-         */
         files: string[];
-        /**
-         * Delay in milliseconds to wait before starting to compute
-         * errors for the files in the file list
-         */
         delay: number;
     }
-    /**
-     * Geterr request; value of command field is "geterr". Wait for
-     * delay milliseconds and then, if during the wait no change or
-     * reload messages have arrived for the first file in the files
-     * list, get the syntactic errors for the file, field requests,
-     * and then get the semantic errors for the file.  Repeat with a
-     * smaller delay for each subsequent file on the files list.  Best
-     * practice for an editor is to send a file list containing each
-     * file that is currently visible, in most-recently-used order.
-     */
     interface GeterrRequest extends Request {
         command: CommandTypes.Geterr;
         arguments: GeterrRequestArgs;
     }
     type RequestCompletedEventName = "requestCompleted";
-    /**
-     * Event that is sent when server have finished processing request with specified id.
-     */
     interface RequestCompletedEvent extends Event {
         event: RequestCompletedEventName;
         body: RequestCompletedEventBody;
@@ -7231,78 +12935,31 @@ declare namespace ts.server.protocol {
     interface RequestCompletedEventBody {
         request_seq: number;
     }
-    /**
-     * Item of diagnostic information found in a DiagnosticEvent message.
-     */
     interface Diagnostic {
-        /**
-         * Starting file location at which text applies.
-         */
         start: Location;
-        /**
-         * The last file location at which the text applies.
-         */
         end: Location;
-        /**
-         * Text of diagnostic message.
-         */
         text: string;
-        /**
-         * The category of the diagnostic message, e.g. "error", "warning", or "suggestion".
-         */
         category: string;
         reportsUnnecessary?: {};
-        /**
-         * The error code of the diagnostic message.
-         */
         code?: number;
-        /**
-         * The name of the plugin reporting the message.
-         */
         source?: string;
     }
     interface DiagnosticWithFileName extends Diagnostic {
-        /**
-         * Name of the file the diagnostic is in
-         */
         fileName: string;
     }
     interface DiagnosticEventBody {
-        /**
-         * The file for which diagnostic information is reported.
-         */
         file: string;
-        /**
-         * An array of diagnostic information items.
-         */
         diagnostics: Diagnostic[];
     }
     type DiagnosticEventKind = "semanticDiag" | "syntaxDiag" | "suggestionDiag";
-    /**
-     * Event message for DiagnosticEventKind event types.
-     * These events provide syntactic and semantic errors for a file.
-     */
     interface DiagnosticEvent extends Event {
         body?: DiagnosticEventBody;
     }
     interface ConfigFileDiagnosticEventBody {
-        /**
-         * The file which trigged the searching and error-checking of the config file
-         */
         triggerFile: string;
-        /**
-         * The name of the found config file.
-         */
         configFile: string;
-        /**
-         * An arry of diagnostic information items for the found config file.
-         */
         diagnostics: DiagnosticWithFileName[];
     }
-    /**
-     * Event message for "configFileDiag" event type.
-     * This event provides errors for a found config file.
-     */
     interface ConfigFileDiagnosticEvent extends Event {
         body?: ConfigFileDiagnosticEventBody;
         event: "configFileDiag";
@@ -7313,17 +12970,7 @@ declare namespace ts.server.protocol {
         body?: ProjectLanguageServiceStateEventBody;
     }
     interface ProjectLanguageServiceStateEventBody {
-        /**
-         * Project name that has changes in the state of language service.
-         * For configured projects this will be the config file path.
-         * For external projects this will be the name of the projects specified when project was open.
-         * For inferred projects this event is not raised.
-         */
         projectName: string;
-        /**
-         * True if language service state switched from disabled to enabled
-         * and false otherwise.
-         */
         languageServiceEnabled: boolean;
     }
     type ProjectsUpdatedInBackgroundEventName = "projectsUpdatedInBackground";
@@ -7332,215 +12979,76 @@ declare namespace ts.server.protocol {
         body: ProjectsUpdatedInBackgroundEventBody;
     }
     interface ProjectsUpdatedInBackgroundEventBody {
-        /**
-         * Current set of open files
-         */
         openFiles: string[];
     }
-    /**
-     * Arguments for reload request.
-     */
     interface ReloadRequestArgs extends FileRequestArgs {
-        /**
-         * Name of temporary file from which to reload file
-         * contents. May be same as file.
-         */
         tmpfile: string;
     }
-    /**
-     * Reload request message; value of command field is "reload".
-     * Reload contents of file with name given by the 'file' argument
-     * from temporary file with name given by the 'tmpfile' argument.
-     * The two names can be identical.
-     */
     interface ReloadRequest extends FileRequest {
         command: CommandTypes.Reload;
         arguments: ReloadRequestArgs;
     }
-    /**
-     * Response to "reload" request. This is just an acknowledgement, so
-     * no body field is required.
-     */
     interface ReloadResponse extends Response {
     }
-    /**
-     * Arguments for saveto request.
-     */
     interface SavetoRequestArgs extends FileRequestArgs {
-        /**
-         * Name of temporary file into which to save server's view of
-         * file contents.
-         */
         tmpfile: string;
     }
-    /**
-     * Saveto request message; value of command field is "saveto".
-     * For debugging purposes, save to a temporaryfile (named by
-     * argument 'tmpfile') the contents of file named by argument
-     * 'file'.  The server does not currently send a response to a
-     * "saveto" request.
-     */
     interface SavetoRequest extends FileRequest {
         command: CommandTypes.Saveto;
         arguments: SavetoRequestArgs;
     }
-    /**
-     * Arguments for navto request message.
-     */
     interface NavtoRequestArgs extends FileRequestArgs {
-        /**
-         * Search term to navigate to from current location; term can
-         * be '.*' or an identifier prefix.
-         */
         searchValue: string;
-        /**
-         *  Optional limit on the number of items to return.
-         */
         maxResultCount?: number;
-        /**
-         * Optional flag to indicate we want results for just the current file
-         * or the entire project.
-         */
         currentFileOnly?: boolean;
         projectFileName?: string;
     }
-    /**
-     * Navto request message; value of command field is "navto".
-     * Return list of objects giving file locations and symbols that
-     * match the search term given in argument 'searchTerm'.  The
-     * context for the search is given by the named file.
-     */
     interface NavtoRequest extends FileRequest {
         command: CommandTypes.Navto;
         arguments: NavtoRequestArgs;
     }
-    /**
-     * An item found in a navto response.
-     */
     interface NavtoItem {
-        /**
-         * The symbol's name.
-         */
         name: string;
-        /**
-         * The symbol's kind (such as 'className' or 'parameterName').
-         */
         kind: ScriptElementKind;
-        /**
-         * exact, substring, or prefix.
-         */
         matchKind?: string;
-        /**
-         * If this was a case sensitive or insensitive match.
-         */
         isCaseSensitive?: boolean;
-        /**
-         * Optional modifiers for the kind (such as 'public').
-         */
         kindModifiers?: string;
-        /**
-         * The file in which the symbol is found.
-         */
         file: string;
-        /**
-         * The location within file at which the symbol is found.
-         */
         start: Location;
-        /**
-         * One past the last character of the symbol.
-         */
         end: Location;
-        /**
-         * Name of symbol's container symbol (if any); for example,
-         * the class name if symbol is a class member.
-         */
         containerName?: string;
-        /**
-         * Kind of symbol's container symbol (if any).
-         */
         containerKind?: ScriptElementKind;
     }
-    /**
-     * Navto response message. Body is an array of navto items.  Each
-     * item gives a symbol that matched the search term.
-     */
     interface NavtoResponse extends Response {
         body?: NavtoItem[];
     }
-    /**
-     * Arguments for change request message.
-     */
     interface ChangeRequestArgs extends FormatRequestArgs {
-        /**
-         * Optional string to insert at location (file, line, offset).
-         */
         insertString?: string;
     }
-    /**
-     * Change request message; value of command field is "change".
-     * Update the server's view of the file named by argument 'file'.
-     * Server does not currently send a response to a change request.
-     */
     interface ChangeRequest extends FileLocationRequest {
         command: CommandTypes.Change;
         arguments: ChangeRequestArgs;
     }
-    /**
-     * Response to "brace" request.
-     */
     interface BraceResponse extends Response {
         body?: TextSpan[];
     }
-    /**
-     * Brace matching request; value of command field is "brace".
-     * Return response giving the file locations of matching braces
-     * found in file at location line, offset.
-     */
     interface BraceRequest extends FileLocationRequest {
         command: CommandTypes.Brace;
     }
-    /**
-     * NavBar items request; value of command field is "navbar".
-     * Return response giving the list of navigation bar entries
-     * extracted from the requested file.
-     */
     interface NavBarRequest extends FileRequest {
         command: CommandTypes.NavBar;
     }
-    /**
-     * NavTree request; value of command field is "navtree".
-     * Return response giving the navigation tree of the requested file.
-     */
     interface NavTreeRequest extends FileRequest {
         command: CommandTypes.NavTree;
     }
     interface NavigationBarItem {
-        /**
-         * The item's display text.
-         */
         text: string;
-        /**
-         * The symbol's kind (such as 'className' or 'parameterName').
-         */
         kind: ScriptElementKind;
-        /**
-         * Optional modifiers for the kind (such as 'public').
-         */
         kindModifiers?: string;
-        /**
-         * The definition locations of the item.
-         */
         spans: TextSpan[];
-        /**
-         * Optional children.
-         */
         childItems?: NavigationBarItem[];
-        /**
-         * Number of levels deep this item should appear.
-         */
         indent: number;
     }
-    /** protocol.NavigationTree is identical to ts.NavigationTree, except using protocol.TextSpan instead of ts.TextSpan */
     interface NavigationTree {
         text: string;
         kind: ScriptElementKind;
@@ -7572,17 +13080,8 @@ declare namespace ts.server.protocol {
         payload: TypingsInstalledTelemetryEventPayload;
     }
     interface TypingsInstalledTelemetryEventPayload {
-        /**
-         * Comma separated list of installed typing packages
-         */
         installedPackages: string;
-        /**
-         * true if install request succeeded, otherwise - false
-         */
         installSuccess: boolean;
-        /**
-         * version of typings installer
-         */
         typingsInstallerVersion: string;
     }
     type BeginInstallTypesEventName = "beginInstallTypes";
@@ -7596,21 +13095,12 @@ declare namespace ts.server.protocol {
         body: EndInstallTypesEventBody;
     }
     interface InstallTypesEventBody {
-        /**
-         * correlation id to match begin and end events
-         */
         eventId: number;
-        /**
-         * list of packages to install
-         */
         packages: ReadonlyArray<string>;
     }
     interface BeginInstallTypesEventBody extends InstallTypesEventBody {
     }
     interface EndInstallTypesEventBody extends InstallTypesEventBody {
-        /**
-         * true if installation succeeded, otherwise false
-         */
         success: boolean;
     }
     interface NavBarResponse extends Response {
@@ -7653,15 +13143,7 @@ declare namespace ts.server.protocol {
     interface UserPreferences {
         readonly disableSuggestions?: boolean;
         readonly quotePreference?: "double" | "single";
-        /**
-         * If enabled, TypeScript will search through all external modules' exports and add them to the completions list.
-         * This affects lone identifier completions but not completions on the right hand side of `obj.`.
-         */
         readonly includeCompletionsForModuleExports?: boolean;
-        /**
-         * If enabled, the completion list will include completions with invalid identifier names.
-         * For those entries, The `insertText` and `replacementSpan` properties will be set to change from `.x` property access to `["x"]`.
-         */
         readonly includeCompletionsWithInsertText?: boolean;
         readonly importModuleSpecifierPreference?: "relative" | "non-relative";
         readonly allowTextChangesInNewFiles?: boolean;
@@ -7733,7 +13215,6 @@ declare namespace ts.server.protocol {
         traceResolution?: boolean;
         resolveJsonModule?: boolean;
         types?: string[];
-        /** Paths used to used to compute primary types search locations */
         typeRoots?: string[];
         [option: string]: CompilerOptionsValue | undefined;
     }
@@ -7772,25 +13253,65 @@ declare namespace ts.server.protocol {
     }
 }
 declare namespace ts.server {
+    class TextStorage {
+        private readonly host;
+        private readonly fileName;
+        private svc;
+        private svcVersion;
+        private text;
+        private lineMap;
+        private textVersion;
+        isOpen: boolean;
+        private ownFileText;
+        private pendingReloadFromDisk;
+        constructor(host: ServerHost, fileName: NormalizedPath);
+        getVersion(): string;
+        hasScriptVersionCache_TestOnly(): boolean;
+        useScriptVersionCache_TestOnly(): void;
+        useText(newText?: string): void;
+        edit(start: number, end: number, newText: string): void;
+        reload(newText: string): true | undefined;
+        reloadWithFileText(tempFileName?: string): true | undefined;
+        reloadFromDisk(): boolean | undefined;
+        delayReloadFromFileIntoText(): void;
+        getSnapshot(): IScriptSnapshot;
+        getLineInfo(line: number): AbsolutePositionAndLineText;
+        lineToTextSpan(line: number): TextSpan;
+        lineOffsetToPosition(line: number, offset: number): number;
+        positionToLineOffset(position: number): protocol.Location;
+        private getFileText;
+        private switchToScriptVersionCache;
+        private useScriptVersionCacheIfValidOrOpen;
+        private getOrLoadText;
+        private getLineMap;
+    }
+    function isDynamicFileName(fileName: NormalizedPath): boolean;
+    interface DocumentRegistrySourceFileCache {
+        key: DocumentRegistryBucketKey;
+        sourceFile: SourceFile;
+    }
     class ScriptInfo {
         private readonly host;
         readonly fileName: NormalizedPath;
         readonly scriptKind: ScriptKind;
         readonly hasMixedContent: boolean;
         readonly path: Path;
-        /**
-         * All projects that include this file
-         */
         readonly containingProjects: Project[];
         private formatSettings;
         private preferences;
+        fileWatcher: FileWatcher | undefined;
         private textStorage;
+        readonly isDynamic: boolean;
+        private realpath;
+        cacheSourceFile: DocumentRegistrySourceFileCache;
         constructor(host: ServerHost, fileName: NormalizedPath, scriptKind: ScriptKind, hasMixedContent: boolean, path: Path);
+        isDynamicOrHasMixedContent(): boolean;
         isScriptOpen(): boolean;
         open(newText: string): void;
         close(fileExists?: boolean): void;
         getSnapshot(): IScriptSnapshot;
         private ensureRealPath;
+        getRealpathIfDifferent(): Path | undefined;
         getFormatCodeSettings(): FormatCodeSettings | undefined;
         getPreferences(): UserPreferences | undefined;
         attachToProject(project: Project): boolean;
@@ -7802,18 +13323,13 @@ declare namespace ts.server {
         setOptions(formatSettings: FormatCodeSettings, preferences: UserPreferences | undefined): void;
         getLatestVersion(): string;
         saveTo(fileName: string): void;
+        delayReloadNonMixedContentFile(): void;
         reloadFromFile(tempFileName?: NormalizedPath): void;
+        getLineInfo(line: number): AbsolutePositionAndLineText;
         editContent(start: number, end: number, newText: string): void;
         markContainingProjectsAsDirty(): void;
         isOrphan(): boolean;
-        /**
-         *  @param line 1 based index
-         */
         lineToTextSpan(line: number): TextSpan;
-        /**
-         * @param line 1 based index
-         * @param offset 1 based index
-         */
         lineOffsetToPosition(line: number, offset: number): number;
         positionToLineOffset(position: number): protocol.Location;
         isJavaScript(): boolean;
@@ -7833,6 +13349,16 @@ declare namespace ts.server {
         readonly globalTypingsCacheLocation: string | undefined;
     }
     const nullTypingsInstaller: ITypingsInstaller;
+    class TypingsCache {
+        private readonly installer;
+        private readonly perProjectCache;
+        constructor(installer: ITypingsInstaller);
+        isKnownTypesPackageName(name: string): boolean;
+        installPackage(options: InstallPackageOptionsWithProject): Promise<ApplyCodeActionCommandResult>;
+        enqueueInstallTypingsForProject(project: Project, unresolvedImports: SortedReadonlyArray<string> | undefined, forceRefresh: boolean): void;
+        updateTypingsForProject(projectName: string, compilerOptions: CompilerOptions, typeAcquisition: TypeAcquisition, unresolvedImports: SortedReadonlyArray<string>, newTypings: string[]): SortedReadonlyArray<never> | SortedArray<string>;
+        onProjectClosed(project: Project): void;
+    }
 }
 declare namespace ts.server {
     enum ProjectKind {
@@ -7840,8 +13366,16 @@ declare namespace ts.server {
         Configured = 1,
         External = 2
     }
+    type Mutable<T> = {
+        -readonly [K in keyof T]: T[K];
+    };
+    function countEachFileTypes(infos: ScriptInfo[]): FileStats;
     function allRootFilesAreJsOrDts(project: Project): boolean;
     function allFilesAreJsOrDts(project: Project): boolean;
+    function hasNoTypeScriptSource(fileNames: string[]): boolean;
+    interface ProjectFilesWithTSDiagnostics extends protocol.ProjectFiles {
+        projectErrors: ReadonlyArray<Diagnostic>;
+    }
     interface PluginCreateInfo {
         project: Project;
         languageService: LanguageService;
@@ -7856,11 +13390,8 @@ declare namespace ts.server {
     type PluginModuleFactory = (mod: {
         typescript: typeof ts;
     }) => PluginModule;
-    /**
-     * The project root can be script info - if root is present,
-     * or it could be just normalized path if root wasnt present on the host(only for non inferred project)
-     */
     type ProjectRoot = ScriptInfo | NormalizedPath;
+    function isScriptInfo(value: ProjectRoot): value is ScriptInfo;
     abstract class Project implements LanguageServiceHost, ModuleResolutionHost {
         readonly projectName: string;
         readonly projectKind: ProjectKind;
@@ -7874,40 +13405,33 @@ declare namespace ts.server {
         private externalFiles;
         private missingFilesMap;
         private plugins;
+        cachedUnresolvedImportsPerFile: Map<ReadonlyArray<string>>;
+        lastCachedUnresolvedImportsList: SortedReadonlyArray<string> | undefined;
+        private hasAddedorRemovedFiles;
         private lastFileExceededProgramSize;
         protected languageService: LanguageService;
         languageServiceEnabled: boolean;
         readonly trace?: (s: string) => void;
         readonly realpath?: (path: string) => string;
+        hasInvalidatedResolution: HasInvalidatedResolution;
+        resolutionCache: ResolutionCache;
         private builderState;
-        /**
-         * Set of files names that were updated since the last call to getChangesSinceVersion.
-         */
         private updatedFileNames;
-        /**
-         * Set of files that was returned from the last call to getChangesSinceVersion.
-         */
         private lastReportedFileNames;
-        /**
-         * Last version that was reported.
-         */
         private lastReportedVersion;
-        /**
-         * Current project's program version. (incremented everytime new program is created that is not complete reuse from the old one)
-         * This property is changed in 'updateGraph' based on the set of files in program
-         */
         private projectProgramVersion;
-        /**
-         * Current version of the project state. It is changed when:
-         * - new root file was added/removed
-         * - edit happen in some file that is currently included in the project.
-         * This property is different from projectStructureVersion since in most cases edits don't affect set of files in the project
-         */
         private projectStateVersion;
+        dirty: boolean;
+        hasChangedAutomaticTypeDirectiveNames: boolean;
+        typingFiles: SortedReadonlyArray<string>;
         private readonly cancellationToken;
         isNonTsProject(): boolean;
         isJsOnlyProject(): boolean;
         static resolveModule(moduleName: string, initialDir: string, host: ServerHost, log: (message: string) => void): {} | undefined;
+        readonly currentDirectory: string;
+        directoryStructureHost: DirectoryStructureHost;
+        readonly getCanonicalFileName: GetCanonicalFileName;
+        constructor(projectName: string, projectKind: ProjectKind, projectService: ProjectService, documentRegistry: DocumentRegistry, hasExplicitListOfFiles: boolean, lastFileExceededProgramSize: string | undefined, compilerOptions: CompilerOptions, compileOnSaveEnabled: boolean, directoryStructureHost: DirectoryStructureHost, currentDirectory: string | undefined);
         isKnownTypesPackageName(name: string): boolean;
         installPackage(options: InstallPackageOptions): Promise<ApplyCodeActionCommandResult>;
         private readonly typingsCache;
@@ -7933,20 +13457,22 @@ declare namespace ts.server {
         resolveTypeReferenceDirectives(typeDirectiveNames: string[], containingFile: string): ResolvedTypeReferenceDirective[];
         directoryExists(path: string): boolean;
         getDirectories(path: string): string[];
+        getCachedDirectoryStructureHost(): CachedDirectoryStructureHost;
+        toPath(fileName: string): Path;
+        watchDirectoryOfFailedLookupLocation(directory: string, cb: DirectoryWatcherCallback, flags: WatchDirectoryFlags): FileWatcher;
+        onInvalidatedResolution(): void;
+        watchTypeRootsDirectory(directory: string, cb: DirectoryWatcherCallback, flags: WatchDirectoryFlags): FileWatcher;
+        onChangedAutomaticTypeDirectiveNames(): void;
+        getGlobalCache(): string | undefined;
+        writeLog(s: string): void;
         log(s: string): void;
         error(s: string): void;
         private setInternalCompilerOptionsForEmittingJsFiles;
-        /**
-         * Get the errors that dont have any file name associated
-         */
         getGlobalProjectErrors(): ReadonlyArray<Diagnostic>;
         getAllProjectErrors(): ReadonlyArray<Diagnostic>;
         getLanguageService(ensureSynchronized?: boolean): LanguageService;
         private shouldEmitFile;
         getCompileOnSaveAffectedFileList(scriptInfo: ScriptInfo): string[];
-        /**
-         * Returns true if emit was conducted
-         */
         emitFile(scriptInfo: ScriptInfo, writeFile: (path: string, data: string, writeByteOrderMark?: boolean) => void): boolean;
         enableLanguageService(): void;
         disableLanguageService(lastFileExceededProgramSize?: string): void;
@@ -7955,11 +13481,14 @@ declare namespace ts.server {
         protected removeLocalTypingsFromTypeAcquisition(newTypeAcquisition: TypeAcquisition): TypeAcquisition;
         getExternalFiles(): SortedReadonlyArray<string>;
         getSourceFile(path: Path): SourceFile | undefined;
+        getSourceFileOrConfigFile(path: Path): SourceFile | undefined;
         close(): void;
         private detachScriptInfoIfNotRoot;
         isClosed(): boolean;
         hasRoots(): boolean;
+        isOrphan(): boolean;
         getRootFiles(): NormalizedPath[];
+        getRootFilesMap(): Map<ProjectRoot>;
         getRootScriptInfos(): ScriptInfo[];
         getScriptInfos(): ScriptInfo[];
         getExcludedFiles(): ReadonlyArray<NormalizedPath>;
@@ -7973,11 +13502,11 @@ declare namespace ts.server {
         removeFile(info: ScriptInfo, fileExists: boolean, detachFromProject: boolean): void;
         registerFileUpdate(fileName: string): void;
         markAsDirty(): void;
-        /**
-         * Updates set of files that contribute to this project
-         * @returns: true if set of files in the project stays the same and false - otherwise.
-         */
+        private extractUnresolvedImportsFromSourceFile;
+        onFileAddedOrRemoved(): void;
         updateGraph(): boolean;
+        updateTypingFiles(typingFiles: SortedReadonlyArray<string>): void;
+        getCurrentProgram(): Program;
         protected removeExistingTypings(include: string[]): string[];
         private updateGraphWorker;
         private detachScriptInfoFromProject;
@@ -7987,76 +13516,66 @@ declare namespace ts.server {
         getScriptInfo(uncheckedFileName: string): ScriptInfo | undefined;
         filesToString(writeProjectFileNames: boolean): string;
         setCompilerOptions(compilerOptions: CompilerOptions): void;
+        getChangesSinceVersion(lastKnownVersion?: number): ProjectFilesWithTSDiagnostics;
         protected removeRoot(info: ScriptInfo): void;
         protected enableGlobalPlugins(): void;
         protected enablePlugin(pluginConfigEntry: PluginImport, searchPaths: string[]): void;
-        /** Starts a new check for diagnostics. Call this if some file has updated that would cause diagnostics to be changed. */
         refreshDiagnostics(): void;
         private enableProxy;
     }
-    /**
-     * If a file is opened and no tsconfig (or jsconfig) is found,
-     * the file and its imports/references are put into an InferredProject.
-     */
     class InferredProject extends Project {
         private static readonly newName;
         private _isJsInferredProject;
         toggleJsInferredProject(isJsInferredProject: boolean): void;
         setCompilerOptions(options?: CompilerOptions): void;
-        /** this is canonical project root path */
         readonly projectRootPath: string | undefined;
+        readonly canonicalCurrentDirectory: string | undefined;
+        constructor(projectService: ProjectService, documentRegistry: DocumentRegistry, compilerOptions: CompilerOptions, projectRootPath: NormalizedPath | undefined, currentDirectory: string | undefined);
         addRoot(info: ScriptInfo): void;
         removeRoot(info: ScriptInfo): void;
+        isOrphan(): boolean;
         isProjectWithSingleRoot(): boolean;
         close(): void;
         getTypeAcquisition(): TypeAcquisition;
     }
-    /**
-     * If a file is opened, the server will look for a tsconfig (or jsconfig)
-     * and if successfull create a ConfiguredProject for it.
-     * Otherwise it will create an InferredProject.
-     */
     class ConfiguredProject extends Project {
         compileOnSaveEnabled: boolean;
         private projectReferences;
         private typeAcquisition;
+        configFileWatcher: FileWatcher | undefined;
         private directoriesWatchedForWildcards;
         readonly canonicalConfigFilePath: NormalizedPath;
-        /** Ref count to the project when opened from external project */
+        pendingReload: ConfigFileProgramReloadLevel;
+        configFileSpecs: ConfigFileSpecs | undefined;
         private externalProjectRefCount;
         private projectErrors;
-        /**
-         * If the project has reload from disk pending, it reloads (and then updates graph as part of that) instead of just updating the graph
-         * @returns: true if set of files in the project stays the same and false - otherwise.
-         */
+        constructor(configFileName: NormalizedPath, projectService: ProjectService, documentRegistry: DocumentRegistry, hasExplicitListOfFiles: boolean, compilerOptions: CompilerOptions, lastFileExceededProgramSize: string | undefined, compileOnSaveEnabled: boolean, cachedDirectoryStructureHost: CachedDirectoryStructureHost, projectReferences: ReadonlyArray<ProjectReference> | undefined);
         updateGraph(): boolean;
+        getCachedDirectoryStructureHost(): CachedDirectoryStructureHost;
         getConfigFilePath(): NormalizedPath;
         getProjectReferences(): ReadonlyArray<ProjectReference> | undefined;
         updateReferences(refs: ReadonlyArray<ProjectReference> | undefined): void;
         enablePlugins(): void;
-        /**
-         * Get the errors that dont have any file name associated
-         */
         getGlobalProjectErrors(): ReadonlyArray<Diagnostic>;
-        /**
-         * Get all the project errors
-         */
         getAllProjectErrors(): ReadonlyArray<Diagnostic>;
         setProjectErrors(projectErrors: Diagnostic[]): void;
         setTypeAcquisition(newTypeAcquisition: TypeAcquisition): void;
         getTypeAcquisition(): TypeAcquisition;
+        watchWildcards(wildcardDirectories: Map<WatchDirectoryFlags>): void;
+        stopWatchingWildCards(): void;
         close(): void;
+        addExternalProjectReference(): void;
+        deleteExternalProjectReference(): void;
+        hasOpenRef(): boolean;
         getEffectiveTypeRoots(): string[];
+        updateErrorOnNoInputFiles(hasFileNames: boolean): void;
     }
-    /**
-     * Project whose configuration is handled externally, such as in a '.csproj'.
-     * These are created only if a host explicitly calls `openExternalProject`.
-     */
     class ExternalProject extends Project {
         externalProjectName: string;
         compileOnSaveEnabled: boolean;
         excludedFiles: ReadonlyArray<NormalizedPath>;
         private typeAcquisition;
+        constructor(externalProjectName: string, projectService: ProjectService, documentRegistry: DocumentRegistry, compilerOptions: CompilerOptions, lastFileExceededProgramSize: string | undefined, compileOnSaveEnabled: boolean, projectFilePath?: string);
         getExcludedFiles(): ReadonlyArray<NormalizedPath>;
         getTypeAcquisition(): TypeAcquisition;
         setTypeAcquisition(newTypeAcquisition: TypeAcquisition): void;
@@ -8090,20 +13609,13 @@ declare namespace ts.server {
             languageServiceEnabled: boolean;
         };
     }
-    /** This will be converted to the payload of a protocol.TelemetryEvent in session.defaultEventHandler. */
     interface ProjectInfoTelemetryEvent {
         readonly eventName: typeof ProjectInfoTelemetryEvent;
         readonly data: ProjectInfoTelemetryEventData;
     }
     interface ProjectInfoTelemetryEventData {
-        /** Cryptographically secure hash of project file location. */
         readonly projectId: string;
-        /** Count of file extensions seen in the project. */
         readonly fileStats: FileStats;
-        /**
-         * Any compiler options that might contain paths will be taken out.
-         * Enum compiler options will be converted to strings.
-         */
         readonly compilerOptions: CompilerOptions;
         readonly extends: boolean | undefined;
         readonly files: boolean | undefined;
@@ -8114,14 +13626,8 @@ declare namespace ts.server {
         readonly configFileName: "tsconfig.json" | "jsconfig.json" | "other";
         readonly projectType: "external" | "configured";
         readonly languageServiceEnabled: boolean;
-        /** TypeScript version used by the server. */
         readonly version: string;
     }
-    /**
-     * Info that we may send about a file that was just opened.
-     * Info about a file will only be sent once per session, even if the file changes in ways that might affect the info.
-     * Currently this is only sent for '.js' files.
-     */
     interface OpenFileInfoTelemetryEvent {
         readonly eventName: typeof OpenFileInfoTelemetryEvent;
         readonly data: OpenFileInfoTelemetryEventData;
@@ -8174,6 +13680,20 @@ declare namespace ts.server {
         configFileName?: NormalizedPath;
         configFileErrors?: ReadonlyArray<Diagnostic>;
     }
+    enum WatchType {
+        ConfigFilePath = "Config file for the program",
+        MissingFilePath = "Missing file from program",
+        WildcardDirectories = "Wild card directory",
+        ClosedScriptInfo = "Closed Script info",
+        ConfigFileForInferredRoot = "Config file for the inferred project root",
+        FailedLookupLocation = "Directory of Failed lookup locations in module resolution",
+        TypeRoots = "Type root directory"
+    }
+    interface ConfigFileExistenceInfo {
+        exists: boolean;
+        openFilesImpactedByConfigFile: Map<boolean>;
+        configFileWatcherForRootOfInferredProject?: FileWatcher;
+    }
     interface ProjectServiceOptions {
         host: ServerHost;
         logger: Logger;
@@ -8191,54 +13711,27 @@ declare namespace ts.server {
         syntaxOnly?: boolean;
     }
     class ProjectService {
-        /**
-         * Container of all known scripts
-         */
+        readonly typingsCache: TypingsCache;
+        readonly documentRegistry: DocumentRegistry;
         private readonly filenameToScriptInfo;
         private readonly allJsFilesForOpenFileTelemetry;
-        /**
-         * maps external project file name to list of config files that were the part of this project
-         */
+        readonly realpathToScriptInfos: MultiMap<ScriptInfo> | undefined;
         private readonly externalProjectToConfiguredProjectMap;
-        /**
-         * external projects (configuration and list of root files is not controlled by tsserver)
-         */
         readonly externalProjects: ExternalProject[];
-        /**
-         * projects built from openFileRoots
-         */
         readonly inferredProjects: InferredProject[];
-        /**
-         * projects specified by a tsconfig.json file
-         */
         readonly configuredProjects: Map<ConfiguredProject>;
-        /**
-         * Open files: with value being project root path, and key being Path of the file that is open
-         */
         readonly openFiles: Map<NormalizedPath | undefined>;
-        /**
-         * Map of open files that are opened without complete path but have projectRoot as current directory
-         */
         private readonly openFilesWithNonRootedDiskPath;
         private compilerOptionsForInferredProjects;
         private compilerOptionsForInferredProjectsPerProjectRoot;
-        /**
-         * Project size for configured or external projects
-         */
         private readonly projectToSizeMap;
-        /**
-         * This is a map of config file paths existance that doesnt need query to disk
-         * - The entry can be present because there is inferred project that needs to watch addition of config file to directory
-         *   In this case the exists could be true/false based on config file is present or not
-         * - Or it is present if we have configured project open with config file at that location
-         *   In this case the exists property is always true
-         */
         private readonly configFileExistenceInfoCache;
         private readonly throttledOperations;
         private readonly hostConfiguration;
         private safelist;
         private legacySafelist;
         private pendingProjectUpdates;
+        pendingEnsureProjectForOpenFiles: boolean;
         readonly currentDirectory: NormalizedPath;
         readonly toCanonicalFileName: (f: string) => string;
         readonly host: ServerHost;
@@ -8256,90 +13749,60 @@ declare namespace ts.server {
         readonly allowLocalPluginLoads: boolean;
         readonly typesMapLocation: string | undefined;
         readonly syntaxOnly?: boolean;
-        /** Tracks projects that we have already sent telemetry for. */
         private readonly seenProjects;
+        readonly watchFactory: WatchFactory<WatchType, Project>;
         constructor(opts: ProjectServiceOptions);
         toPath(fileName: string): Path;
+        getExecutingFilePath(): string;
+        getNormalizedAbsolutePath(fileName: string): string;
+        setDocument(key: DocumentRegistryBucketKey, path: Path, sourceFile: SourceFile): void;
+        getDocument(key: DocumentRegistryBucketKey, path: Path): SourceFile | undefined;
+        ensureInferredProjectsUpToDate_TestOnly(): void;
+        getCompilerOptionsForInferredProjects(): CompilerOptions;
+        onUpdateLanguageServiceStateForProject(project: Project, languageServiceEnabled: boolean): void;
         private loadTypesMap;
         updateTypingsForProject(response: SetTypings | InvalidateCachedTypings | PackageInstalledResponse): void;
+        updateTypingsForProject(response: SetTypings | InvalidateCachedTypings | PackageInstalledResponse | BeginInstallTypes | EndInstallTypes): void;
         private delayEnsureProjectForOpenFiles;
         private delayUpdateProjectGraph;
+        hasPendingProjectUpdate(project: Project): boolean;
+        sendProjectsUpdatedInBackgroundEvent(): void;
+        delayUpdateProjectGraphAndEnsureProjectStructureForOpenFiles(project: Project): void;
         private delayUpdateProjectGraphs;
         setCompilerOptionsForInferredProjects(projectCompilerOptions: protocol.ExternalProjectCompilerOptions, projectRootPath?: string): void;
         findProject(projectName: string): Project | undefined;
         getDefaultProjectForFile(fileName: NormalizedPath, ensureProject: boolean): Project | undefined;
         getScriptInfoEnsuringProjectsUptoDate(uncheckedFileName: string): ScriptInfo | undefined;
-        /**
-         * Ensures the project structures are upto date
-         * This means,
-         * - we go through all the projects and update them if they are dirty
-         * - if updates reflect some change in structure or there was pending request to ensure projects for open files
-         *   ensure that each open script info has project
-         */
         private ensureProjectStructuresUptoDate;
         getFormatCodeOptions(file: NormalizedPath): FormatCodeSettings;
         getPreferences(file: NormalizedPath): UserPreferences;
         private onSourceFileChanged;
         private handleDeletedFile;
+        watchWildcardDirectory(directory: Path, flags: WatchDirectoryFlags, project: ConfiguredProject): FileWatcher;
+        getConfigFileExistenceInfo(project: ConfiguredProject): ConfigFileExistenceInfo;
         private onConfigChangedForConfiguredProject;
-        /**
-         * This is the callback function for the config file add/remove/change at any location
-         * that matters to open script info but doesnt have configured project open
-         * for the config file
-         */
         private onConfigFileChangeForOpenScriptInfo;
         private removeProject;
-        /**
-         * Remove this file from the set of open, non-configured files.
-         * @param info The file that has been closed or newly configured
-         */
+        assignOrphanScriptInfoToInferredProject(info: ScriptInfo, projectRootPath: NormalizedPath | undefined): InferredProject;
         private closeOpenFile;
         private deleteScriptInfo;
         private configFileExists;
         private setConfigFileExistenceByNewConfiguredProject;
-        /**
-         * Returns true if the configFileExistenceInfo is needed/impacted by open files that are root of inferred project
-         */
         private configFileExistenceImpactsRootOfInferredProject;
         private setConfigFileExistenceInfoByClosedConfiguredProject;
         private logConfigFileWatchUpdate;
-        /**
-         * Create the watcher for the configFileExistenceInfo
-         */
         private createConfigFileWatcherOfConfigFileExistence;
-        /**
-         * Close the config file watcher in the cached ConfigFileExistenceInfo
-         *   if there arent any open files that are root of inferred project
-         */
         private closeConfigFileWatcherOfConfigFileExistenceInfo;
-        /**
-         * This is called on file close, so that we stop watching the config file for this script info
-         */
         private stopWatchingConfigFilesForClosedScriptInfo;
-        /**
-         * This function tries to search for a tsconfig.json for the given file.
-         * This is different from the method the compiler uses because
-         * the compiler can assume it will always start searching in the
-         * current directory (the directory in which tsc was invoked).
-         * The server must start searching from the directory containing
-         * the newly opened file.
-         */
+        startWatchingConfigFilesForInferredProjectRoot(info: ScriptInfo): void;
+        stopWatchingConfigFilesForInferredProjectRoot(info: ScriptInfo): void;
         private forEachConfigFileLocation;
-        /**
-         * This function tries to search for a tsconfig.json for the given file.
-         * This is different from the method the compiler uses because
-         * the compiler can assume it will always start searching in the
-         * current directory (the directory in which tsc was invoked).
-         * The server must start searching from the directory containing
-         * the newly opened file.
-         */
         private getConfigFileNameForFile;
         private printProjects;
         private findConfiguredProjectByProjectName;
         private getConfiguredProjectByCanonicalConfigFilePath;
         private findExternalProjectByProjectName;
         private convertConfigFileContentToProjectOptions;
-        /** Get a filename if the language service exceeds the maximum allowed program size; otherwise returns undefined. */
         private getFilenameForExceededTotalSizeLimitForNonTsFiles;
         private createExternalProject;
         private sendProjectTelemetry;
@@ -8347,70 +13810,45 @@ declare namespace ts.server {
         private createConfiguredProject;
         private updateNonInferredProjectFiles;
         private updateNonInferredProject;
+        reloadFileNamesOfConfiguredProject(project: ConfiguredProject): boolean;
+        reloadConfiguredProject(project: ConfiguredProject): void;
         private sendConfigFileDiagEvent;
         private getOrCreateInferredProjectForProjectRootPathIfEnabled;
         private getOrCreateSingleInferredProjectIfEnabled;
         private getOrCreateSingleInferredWithoutProjectRoot;
         private createInferredProject;
+        getOrCreateScriptInfoNotOpenedByClient(uncheckedFileName: string, currentDirectory: string, hostToQueryFileExistsOn: DirectoryStructureHost): ScriptInfo | undefined;
         getScriptInfo(uncheckedFileName: string): ScriptInfo | undefined;
+        getSymlinkedProjects(info: ScriptInfo): MultiMap<Project> | undefined;
         private watchClosedScriptInfo;
         private stopWatchingScriptInfo;
+        getOrCreateScriptInfoNotOpenedByClientForNormalizedPath(fileName: NormalizedPath, currentDirectory: string, scriptKind: ScriptKind | undefined, hasMixedContent: boolean | undefined, hostToQueryFileExistsOn: DirectoryStructureHost | undefined): ScriptInfo | undefined;
+        getOrCreateScriptInfoOpenedByClientForNormalizedPath(fileName: NormalizedPath, currentDirectory: string, fileContent: string | undefined, scriptKind: ScriptKind | undefined, hasMixedContent: boolean | undefined): ScriptInfo | undefined;
         getOrCreateScriptInfoForNormalizedPath(fileName: NormalizedPath, openedByClient: boolean, fileContent?: string, scriptKind?: ScriptKind, hasMixedContent?: boolean, hostToQueryFileExistsOn?: {
             fileExists(path: string): boolean;
         }): ScriptInfo | undefined;
         private getOrCreateScriptInfoWorker;
-        /**
-         * This gets the script info for the normalized path. If the path is not rooted disk path then the open script info with project root context is preferred
-         */
         getScriptInfoForNormalizedPath(fileName: NormalizedPath): ScriptInfo | undefined;
         getScriptInfoForPath(fileName: Path): ScriptInfo | undefined;
         setHostConfiguration(args: protocol.ConfigureRequestArguments): void;
         closeLog(): void;
-        /**
-         * This function rebuilds the project for every file opened by the client
-         * This does not reload contents of open files from disk. But we could do that if needed
-         */
         reloadProjects(): void;
         private delayReloadConfiguredProjectForFiles;
-        /**
-         * This function goes through all the openFiles and tries to file the config file for them.
-         * If the config file is found and it refers to existing project, it reloads it either immediately
-         * or schedules it for reload depending on delayReload option
-         * If the there is no existing project it just opens the configured project for the config file
-         * reloadForInfo provides a way to filter out files to reload configured project for
-         */
         private reloadConfiguredProjectForFiles;
-        /**
-         * Remove the root of inferred project if script info is part of another project
-         */
         private removeRootOfInferredProjectIfNowPartOfOtherProject;
-        /**
-         * This function is to update the project structure for every inferred project.
-         * It is called on the premise that all the configured projects are
-         * up to date.
-         * This will go through open files and assign them to inferred project if open file is not part of any other project
-         * After that all the inferred project graphs are updated
-         */
         private ensureProjectForOpenFiles;
-        /**
-         * Open file whose contents is managed by the client
-         * @param filename is absolute pathname
-         * @param fileContent is a known version of the file content that is more up to date than the one on disk
-         */
         openClientFile(fileName: string, fileContent?: string, scriptKind?: ScriptKind, projectRootPath?: string): OpenConfiguredProjectResult;
         private findExternalProjectContainingOpenScriptInfo;
         openClientFileWithNormalizedPath(fileName: NormalizedPath, fileContent?: string, scriptKind?: ScriptKind, hasMixedContent?: boolean, projectRootPath?: NormalizedPath): OpenConfiguredProjectResult;
         private telemetryOnOpenFile;
-        /**
-         * Close file whose contents is managed by the client
-         * @param filename is absolute pathname
-         */
         closeClientFile(uncheckedFileName: string): void;
         private collectChanges;
+        synchronizeProjectList(knownProjects: protocol.ProjectVersionInfo[]): ProjectFilesWithTSDiagnostics[];
+        applyChangesInOpenFiles(openFiles: protocol.ExternalFile[] | undefined, changedFiles: protocol.ChangedOpenFile[] | undefined, closedFiles: string[] | undefined): void;
+        applyChangesToFile(scriptInfo: ScriptInfo, changes: TextChange[]): void;
         private closeConfiguredProjectReferencedFromExternalProject;
         closeExternalProject(uncheckedFileName: string): void;
         openExternalProjects(projects: protocol.ExternalProject[]): void;
-        /** Makes a filename safe to insert in a RegExp */
         private static readonly filenameEscapeRegexp;
         private static escapeFilenameForRegex;
         resetSafeList(): void;
@@ -8436,6 +13874,7 @@ declare namespace ts.server {
     interface EventSender {
         event: Event;
     }
+    function toEvent(eventName: string, body: object): protocol.Event;
     interface SessionOptions {
         host: ServerHost;
         cancellationToken: ServerCancellationToken;
@@ -8445,12 +13884,8 @@ declare namespace ts.server {
         byteLength: (buf: string, encoding?: string) => number;
         hrtime: (start?: number[]) => number[];
         logger: Logger;
-        /**
-         * If falsy, all events are suppressed.
-         */
         canUseEvents: boolean;
         eventHandler?: ProjectServiceEventHandler;
-        /** Has no effect if eventHandler is also specified. */
         suppressDiagnosticEvents?: boolean;
         syntaxOnly?: boolean;
         throttleWaitMilliseconds?: number;
@@ -8482,14 +13917,12 @@ declare namespace ts.server {
         logError(err: Error, cmd: string): void;
         send(msg: protocol.Message): void;
         event<T extends object>(body: T, eventName: string): void;
-        /** @deprecated */
         output(info: any, cmdName: string, reqSeq?: number, errorMsg?: string): void;
         private doOutput;
         private semanticCheck;
         private syntacticCheck;
         private suggestionCheck;
         private sendDiagnosticsEvent;
-        /** It is the caller's responsibility to verify that `!this.suppressDiagnosticEvents`. */
         private updateErrorCheck;
         private cleanProjects;
         private cleanup;
@@ -8522,10 +13955,6 @@ declare namespace ts.server {
         private getDefaultProject;
         private getRenameLocations;
         private getReferences;
-        /**
-         * @param fileName is the name of the file to be opened
-         * @param fileContent is a version of the file content that is known to be more up to date than the one on disk
-         */
         private openClientFile;
         private getPosition;
         private getPositionInFile;
@@ -8598,7 +14027,110 @@ declare namespace ts.server {
         response?: {};
         responseRequired?: boolean;
     }
+    function getLocationInNewDocument(oldText: string, renameFilename: string, renameLocation: number, edits: ReadonlyArray<FileTextChanges>): protocol.Location;
 }
-
+declare namespace ts.server {
+    interface LineCollection {
+        charCount(): number;
+        lineCount(): number;
+        isLeaf(): this is LineLeaf;
+        walk(rangeStart: number, rangeLength: number, walkFns: LineIndexWalker): void;
+    }
+    interface AbsolutePositionAndLineText {
+        absolutePosition: number;
+        lineText: string | undefined;
+    }
+    enum CharRangeSection {
+        PreStart = 0,
+        Start = 1,
+        Entire = 2,
+        Mid = 3,
+        End = 4,
+        PostEnd = 5
+    }
+    interface LineIndexWalker {
+        goSubtree: boolean;
+        done: boolean;
+        leaf(relativeStart: number, relativeLength: number, lineCollection: LineLeaf): void;
+        pre?(relativeStart: number, relativeLength: number, lineCollection: LineCollection, parent: LineNode, nodeType: CharRangeSection): void;
+        post?(relativeStart: number, relativeLength: number, lineCollection: LineCollection, parent: LineNode, nodeType: CharRangeSection): void;
+    }
+    class ScriptVersionCache {
+        private changes;
+        private readonly versions;
+        private minVersion;
+        private currentVersion;
+        private static readonly changeNumberThreshold;
+        private static readonly changeLengthThreshold;
+        private static readonly maxVersions;
+        private versionToIndex;
+        private currentVersionToIndex;
+        edit(pos: number, deleteLen: number, insertedText?: string): void;
+        getSnapshot(): IScriptSnapshot;
+        private _getSnapshot;
+        getSnapshotVersion(): number;
+        getLineInfo(line: number): AbsolutePositionAndLineText;
+        lineOffsetToPosition(line: number, column: number): number;
+        positionToLineOffset(position: number): protocol.Location;
+        lineToTextSpan(line: number): TextSpan;
+        getTextChangesBetweenVersions(oldVersion: number, newVersion: number): TextChangeRange | undefined;
+        static fromString(script: string): ScriptVersionCache;
+    }
+    class LineIndex {
+        root: LineNode;
+        checkEdits: boolean;
+        absolutePositionOfStartOfLine(oneBasedLine: number): number;
+        positionToLineOffset(position: number): protocol.Location;
+        private positionToColumnAndLineText;
+        lineNumberToInfo(oneBasedLine: number): AbsolutePositionAndLineText;
+        load(lines: string[]): void;
+        walk(rangeStart: number, rangeLength: number, walkFns: LineIndexWalker): void;
+        getText(rangeStart: number, rangeLength: number): string;
+        getLength(): number;
+        every(f: (ll: LineLeaf, s: number, len: number) => boolean, rangeStart: number, rangeEnd?: number): boolean;
+        edit(pos: number, deleteLength: number, newText?: string): LineIndex;
+        private static buildTreeFromBottom;
+        static linesFromText(text: string): {
+            lines: string[];
+            lineMap: number[];
+        };
+    }
+    class LineNode implements LineCollection {
+        private readonly children;
+        totalChars: number;
+        totalLines: number;
+        constructor(children?: LineCollection[]);
+        isLeaf(): boolean;
+        updateCounts(): void;
+        private execWalk;
+        private skipChild;
+        walk(rangeStart: number, rangeLength: number, walkFns: LineIndexWalker): void;
+        charOffsetToLineInfo(lineNumberAccumulator: number, relativePosition: number): {
+            oneBasedLine: number;
+            zeroBasedColumn: number;
+            lineText: string | undefined;
+        };
+        lineNumberToInfo(relativeOneBasedLine: number, positionAccumulator: number): {
+            position: number;
+            leaf: LineLeaf | undefined;
+        };
+        private splitAfter;
+        remove(child: LineCollection): void;
+        private findChildIndex;
+        insertAt(child: LineCollection, nodes: LineCollection[]): LineNode[];
+        add(collection: LineCollection): void;
+        charCount(): number;
+        lineCount(): number;
+    }
+    class LineLeaf implements LineCollection {
+        text: string;
+        constructor(text: string);
+        isLeaf(): boolean;
+        walk(rangeStart: number, rangeLength: number, walkFns: LineIndexWalker): void;
+        charCount(): number;
+        lineCount(): number;
+    }
+}
+//# sourceMappingURL=server.d.ts.map
 export = ts;
 export as namespace ts;
\ No newline at end of file
diff --git a/lib/tsserverlibrary.js b/lib/tsserverlibrary.js
index 42b15ff9cf6a5..7b357e89a6e8e 100644
--- a/lib/tsserverlibrary.js
+++ b/lib/tsserverlibrary.js
@@ -2712,7 +2712,7 @@ var ts;
         SymbolFlags[SymbolFlags["AliasExcludes"] = 2097152] = "AliasExcludes";
         SymbolFlags[SymbolFlags["ModuleMember"] = 2623475] = "ModuleMember";
         SymbolFlags[SymbolFlags["ExportHasLocal"] = 944] = "ExportHasLocal";
-        SymbolFlags[SymbolFlags["HasExports"] = 1952] = "HasExports";
+        SymbolFlags[SymbolFlags["HasExports"] = 1955] = "HasExports";
         SymbolFlags[SymbolFlags["HasMembers"] = 6240] = "HasMembers";
         SymbolFlags[SymbolFlags["BlockScoped"] = 418] = "BlockScoped";
         SymbolFlags[SymbolFlags["PropertyOrAccessor"] = 98308] = "PropertyOrAccessor";
@@ -25533,7 +25533,7 @@ var ts;
             symbol.flags |= symbolFlags;
             node.symbol = symbol;
             symbol.declarations = ts.append(symbol.declarations, node);
-            if (symbolFlags & 1952 /* HasExports */ && !symbol.exports) {
+            if (symbolFlags & 1955 /* HasExports */ && !symbol.exports) {
                 symbol.exports = ts.createSymbolTable();
             }
             if (symbolFlags & 6240 /* HasMembers */ && !symbol.members) {
@@ -28902,7 +28902,7 @@ var ts;
                 }
                 var t = getTypeOfSymbol(symbol);
                 visitType(t); // Should handle members on classes and such
-                if (symbol.flags & 1952 /* HasExports */) {
+                if (symbol.flags & 1955 /* HasExports */) {
                     symbol.exports.forEach(visitSymbol);
                 }
                 ts.forEach(symbol.declarations, function (d) {
@@ -31200,7 +31200,7 @@ var ts;
             // The ES6 spec permits export * declarations in a module to circularly reference the module itself. For example,
             // module 'a' can 'export * from "b"' and 'b' can 'export * from "a"' without error.
             function visit(symbol) {
-                if (!(symbol && symbol.flags & 1952 /* HasExports */ && ts.pushIfUnique(visitedSymbols, symbol))) {
+                if (!(symbol && symbol.flags & 1955 /* HasExports */ && ts.pushIfUnique(visitedSymbols, symbol))) {
                     return;
                 }
                 var symbols = ts.cloneMap(symbol.exports);
diff --git a/lib/typescript.d.ts b/lib/typescript.d.ts
index acbcabf5beffa..c195146831d97 100644
--- a/lib/typescript.d.ts
+++ b/lib/typescript.d.ts
@@ -13,6 +13,12 @@ See the Apache Version 2.0 License for specific language governing permissions
 and limitations under the License.
 ***************************************************************************** */
 
+
+declare namespace ts {
+    const versionMajorMinor = "3.0";
+    /** The version of the TypeScript compiler release */
+    const version: string;
+}
 declare namespace ts {
     /**
      * Type of objects whose values are all of the same type.
@@ -22,6 +28,9 @@ declare namespace ts {
     interface MapLike<T> {
         [index: string]: T;
     }
+    interface SortedArray<T> extends Array<T> {
+        " __sortedArrayBrand": any;
+    }
     /** ES6 Map interface, only read methods included. */
     interface ReadonlyMap<T> {
         get(key: string): T | undefined;
@@ -52,6 +61,8 @@ declare namespace ts {
     interface Push<T> {
         push(...values: T[]): void;
     }
+}
+declare namespace ts {
     type Path = string & {
         __pathBrand: any;
     };
@@ -2071,7 +2082,7 @@ declare namespace ts {
         AliasExcludes = 2097152,
         ModuleMember = 2623475,
         ExportHasLocal = 944,
-        HasExports = 1952,
+        HasExports = 1955,
         HasMembers = 6240,
         BlockScoped = 418,
         PropertyOrAccessor = 98308,
@@ -2906,9 +2917,6 @@ declare namespace ts {
         span: TextSpan;
         newLength: number;
     }
-    interface SortedArray<T> extends Array<T> {
-        " __sortedArrayBrand": any;
-    }
     interface SyntaxList extends Node {
         _children: Node[];
     }
@@ -2978,15 +2986,6 @@ declare namespace ts {
         IndexSignatureParameters = 4432
     }
 }
-declare namespace ts {
-    const versionMajorMinor = "3.0";
-    /** The version of the TypeScript compiler release */
-    const version: string;
-}
-declare namespace ts {
-    function isExternalModuleNameRelative(moduleName: string): boolean;
-    function sortAndDeduplicateDiagnostics<T extends Diagnostic>(diagnostics: ReadonlyArray<T>): T[];
-}
 declare function setTimeout(handler: (...args: any[]) => void, timeout: number): any;
 declare function clearTimeout(handle: any): void;
 declare namespace ts {
@@ -3099,6 +3098,11 @@ declare namespace ts {
     function isIdentifierPart(ch: number, languageVersion: ScriptTarget | undefined): boolean;
     function createScanner(languageVersion: ScriptTarget, skipTrivia: boolean, languageVariant?: LanguageVariant, textInitial?: string, onError?: ErrorCallback, start?: number, length?: number): Scanner;
 }
+/** Non-internal stuff goes here */
+declare namespace ts {
+    function isExternalModuleNameRelative(moduleName: string): boolean;
+    function sortAndDeduplicateDiagnostics<T extends Diagnostic>(diagnostics: ReadonlyArray<T>): T[];
+}
 declare namespace ts {
     function getDefaultLibFileName(options: CompilerOptions): string;
     function textSpanEnd(span: TextSpan): number;
@@ -3484,6 +3488,79 @@ declare namespace ts {
     function isExternalModule(file: SourceFile): boolean;
     function updateSourceFile(sourceFile: SourceFile, newText: string, textChangeRange: TextChangeRange, aggressiveChecks?: boolean): SourceFile;
 }
+declare namespace ts {
+    function parseCommandLine(commandLine: ReadonlyArray<string>, readFile?: (path: string) => string | undefined): ParsedCommandLine;
+    type DiagnosticReporter = (diagnostic: Diagnostic) => void;
+    /**
+     * Reports config file diagnostics
+     */
+    interface ConfigFileDiagnosticsReporter {
+        /**
+         * Reports unrecoverable error when parsing config file
+         */
+        onUnRecoverableConfigFileDiagnostic: DiagnosticReporter;
+    }
+    /**
+     * Interface extending ParseConfigHost to support ParseConfigFile that reads config file and reports errors
+     */
+    interface ParseConfigFileHost extends ParseConfigHost, ConfigFileDiagnosticsReporter {
+        getCurrentDirectory(): string;
+    }
+    /**
+     * Reads the config file, reports errors if any and exits if the config file cannot be found
+     */
+    function getParsedCommandLineOfConfigFile(configFileName: string, optionsToExtend: CompilerOptions, host: ParseConfigFileHost): ParsedCommandLine | undefined;
+    /**
+     * Read tsconfig.json file
+     * @param fileName The path to the config file
+     */
+    function readConfigFile(fileName: string, readFile: (path: string) => string | undefined): {
+        config?: any;
+        error?: Diagnostic;
+    };
+    /**
+     * Parse the text of the tsconfig.json file
+     * @param fileName The path to the config file
+     * @param jsonText The text of the config file
+     */
+    function parseConfigFileTextToJson(fileName: string, jsonText: string): {
+        config?: any;
+        error?: Diagnostic;
+    };
+    /**
+     * Read tsconfig.json file
+     * @param fileName The path to the config file
+     */
+    function readJsonConfigFile(fileName: string, readFile: (path: string) => string | undefined): TsConfigSourceFile;
+    /**
+     * Convert the json syntax tree into the json value
+     */
+    function convertToObject(sourceFile: JsonSourceFile, errors: Push<Diagnostic>): any;
+    /**
+     * Parse the contents of a config file (tsconfig.json).
+     * @param json The contents of the config file to parse
+     * @param host Instance of ParseConfigHost used to enumerate files in folder.
+     * @param basePath A root directory to resolve relative path entries in the config
+     *    file to. e.g. outDir
+     */
+    function parseJsonConfigFileContent(json: any, host: ParseConfigHost, basePath: string, existingOptions?: CompilerOptions, configFileName?: string, resolutionStack?: Path[], extraFileExtensions?: ReadonlyArray<FileExtensionInfo>): ParsedCommandLine;
+    /**
+     * Parse the contents of a config file (tsconfig.json).
+     * @param jsonNode The contents of the config file to parse
+     * @param host Instance of ParseConfigHost used to enumerate files in folder.
+     * @param basePath A root directory to resolve relative path entries in the config
+     *    file to. e.g. outDir
+     */
+    function parseJsonSourceFileConfigFileContent(sourceFile: TsConfigSourceFile, host: ParseConfigHost, basePath: string, existingOptions?: CompilerOptions, configFileName?: string, resolutionStack?: Path[], extraFileExtensions?: ReadonlyArray<FileExtensionInfo>): ParsedCommandLine;
+    function convertCompilerOptionsFromJson(jsonOptions: any, basePath: string, configFileName?: string): {
+        options: CompilerOptions;
+        errors: Diagnostic[];
+    };
+    function convertTypeAcquisitionFromJson(jsonOptions: any, basePath: string, configFileName?: string): {
+        options: TypeAcquisition;
+        errors: Diagnostic[];
+    };
+}
 declare namespace ts {
     function getEffectiveTypeRoots(options: CompilerOptions, host: GetEffectiveTypeRootsHost): string[] | undefined;
     /**
@@ -4311,76 +4388,179 @@ declare namespace ts {
     function createWatchProgram<T extends BuilderProgram>(host: WatchCompilerHostOfConfigFile<T>): WatchOfConfigFile<T>;
 }
 declare namespace ts {
-    function parseCommandLine(commandLine: ReadonlyArray<string>, readFile?: (path: string) => string | undefined): ParsedCommandLine;
-    type DiagnosticReporter = (diagnostic: Diagnostic) => void;
     /**
-     * Reports config file diagnostics
+     * Branded string for keeping track of when we've turned an ambiguous path
+     * specified like "./blah" to an absolute path to an actual
+     * tsconfig file, e.g. "/root/blah/tsconfig.json"
      */
-    interface ConfigFileDiagnosticsReporter {
-        /**
-         * Reports unrecoverable error when parsing config file
-         */
-        onUnRecoverableConfigFileDiagnostic: DiagnosticReporter;
+    type ResolvedConfigFileName = string & {
+        _isResolvedConfigFileName: never;
+    };
+    interface BuildHost {
+        verbose(diag: DiagnosticMessage, ...args: string[]): void;
+        error(diag: DiagnosticMessage, ...args: string[]): void;
+        errorDiagnostic(diag: Diagnostic): void;
+        message(diag: DiagnosticMessage, ...args: string[]): void;
     }
     /**
-     * Interface extending ParseConfigHost to support ParseConfigFile that reads config file and reports errors
+     * A BuildContext tracks what's going on during the course of a build.
+     *
+     * Callers may invoke any number of build requests within the same context;
+     * until the context is reset, each project will only be built at most once.
+     *
+     * Example: In a standard setup where project B depends on project A, and both are out of date,
+     * a failed build of A will result in A remaining out of date. When we try to build
+     * B, we should immediately bail instead of recomputing A's up-to-date status again.
+     *
+     * This also matters for performing fast (i.e. fake) downstream builds of projects
+     * when their upstream .d.ts files haven't changed content (but have newer timestamps)
      */
-    interface ParseConfigFileHost extends ParseConfigHost, ConfigFileDiagnosticsReporter {
-        getCurrentDirectory(): string;
+    interface BuildContext {
+        options: BuildOptions;
+        /**
+         * Map from output file name to its pre-build timestamp
+         */
+        unchangedOutputs: FileMap<Date>;
+        /**
+         * Map from config file name to up-to-date status
+         */
+        projectStatus: FileMap<UpToDateStatus>;
+        invalidatedProjects: FileMap<true>;
+        queuedProjects: FileMap<true>;
+        missingRoots: Map<true>;
+    }
+    type Mapper = ReturnType<typeof createDependencyMapper>;
+    interface DependencyGraph {
+        buildQueue: ResolvedConfigFileName[];
+        dependencyMap: Mapper;
+    }
+    interface BuildOptions {
+        dry: boolean;
+        force: boolean;
+        verbose: boolean;
+    }
+    enum UpToDateStatusType {
+        Unbuildable = 0,
+        UpToDate = 1,
+        /**
+         * The project appears out of date because its upstream inputs are newer than its outputs,
+         * but all of its outputs are actually newer than the previous identical outputs of its (.d.ts) inputs.
+         * This means we can Pseudo-build (just touch timestamps), as if we had actually built this project.
+         */
+        UpToDateWithUpstreamTypes = 2,
+        OutputMissing = 3,
+        OutOfDateWithSelf = 4,
+        OutOfDateWithUpstream = 5,
+        UpstreamOutOfDate = 6,
+        UpstreamBlocked = 7,
+        /**
+         * Projects with no outputs (i.e. "solution" files)
+         */
+        ContainerOnly = 8
     }
-    /**
-     * Reads the config file, reports errors if any and exits if the config file cannot be found
-     */
-    function getParsedCommandLineOfConfigFile(configFileName: string, optionsToExtend: CompilerOptions, host: ParseConfigFileHost): ParsedCommandLine | undefined;
-    /**
-     * Read tsconfig.json file
-     * @param fileName The path to the config file
-     */
-    function readConfigFile(fileName: string, readFile: (path: string) => string | undefined): {
-        config?: any;
-        error?: Diagnostic;
-    };
-    /**
-     * Parse the text of the tsconfig.json file
-     * @param fileName The path to the config file
-     * @param jsonText The text of the config file
-     */
-    function parseConfigFileTextToJson(fileName: string, jsonText: string): {
-        config?: any;
-        error?: Diagnostic;
+    type UpToDateStatus = Status.Unbuildable | Status.UpToDate | Status.OutputMissing | Status.OutOfDateWithSelf | Status.OutOfDateWithUpstream | Status.UpstreamOutOfDate | Status.UpstreamBlocked | Status.ContainerOnly;
+    namespace Status {
+        /**
+         * The project can't be built at all in its current state. For example,
+         * its config file cannot be parsed, or it has a syntax error or missing file
+         */
+        interface Unbuildable {
+            type: UpToDateStatusType.Unbuildable;
+            reason: string;
+        }
+        /**
+         * This project doesn't have any outputs, so "is it up to date" is a meaningless question.
+         */
+        interface ContainerOnly {
+            type: UpToDateStatusType.ContainerOnly;
+        }
+        /**
+         * The project is up to date with respect to its inputs.
+         * We track what the newest input file is.
+         */
+        interface UpToDate {
+            type: UpToDateStatusType.UpToDate | UpToDateStatusType.UpToDateWithUpstreamTypes;
+            newestInputFileTime: Date;
+            newestInputFileName: string;
+            newestDeclarationFileContentChangedTime: Date;
+            newestOutputFileTime: Date;
+            newestOutputFileName: string;
+            oldestOutputFileName: string;
+        }
+        /**
+         * One or more of the outputs of the project does not exist.
+         */
+        interface OutputMissing {
+            type: UpToDateStatusType.OutputMissing;
+            /**
+             * The name of the first output file that didn't exist
+             */
+            missingOutputFileName: string;
+        }
+        /**
+         * One or more of the project's outputs is older than its newest input.
+         */
+        interface OutOfDateWithSelf {
+            type: UpToDateStatusType.OutOfDateWithSelf;
+            outOfDateOutputFileName: string;
+            newerInputFileName: string;
+        }
+        /**
+         * This project depends on an out-of-date project, so shouldn't be built yet
+         */
+        interface UpstreamOutOfDate {
+            type: UpToDateStatusType.UpstreamOutOfDate;
+            upstreamProjectName: string;
+        }
+        /**
+         * This project depends an upstream project with build errors
+         */
+        interface UpstreamBlocked {
+            type: UpToDateStatusType.UpstreamBlocked;
+            upstreamProjectName: string;
+        }
+        /**
+         * One or more of the project's outputs is older than the newest output of
+         * an upstream project.
+         */
+        interface OutOfDateWithUpstream {
+            type: UpToDateStatusType.OutOfDateWithUpstream;
+            outOfDateOutputFileName: string;
+            newerProjectName: string;
+        }
+    }
+    interface FileMap<T> {
+        setValue(fileName: string, value: T): void;
+        getValue(fileName: string): T | never;
+        getValueOrUndefined(fileName: string): T | undefined;
+        hasKey(fileName: string): boolean;
+        removeKey(fileName: string): void;
+        getKeys(): string[];
+    }
+    function createDependencyMapper(): {
+        addReference: (childConfigFileName: ResolvedConfigFileName, parentConfigFileName: ResolvedConfigFileName) => void;
+        getReferencesTo: (parentConfigFileName: ResolvedConfigFileName) => ResolvedConfigFileName[];
+        getReferencesOf: (childConfigFileName: ResolvedConfigFileName) => ResolvedConfigFileName[];
+        getKeys: () => ReadonlyArray<ResolvedConfigFileName>;
     };
+    function createBuildContext(options: BuildOptions): BuildContext;
+    function performBuild(args: string[], compilerHost: CompilerHost, buildHost: BuildHost, system?: System): number | undefined;
     /**
-     * Read tsconfig.json file
-     * @param fileName The path to the config file
-     */
-    function readJsonConfigFile(fileName: string, readFile: (path: string) => string | undefined): TsConfigSourceFile;
-    /**
-     * Convert the json syntax tree into the json value
+     * A SolutionBuilder has an immutable set of rootNames that are the "entry point" projects, but
+     * can dynamically add/remove other projects based on changes on the rootNames' references
      */
-    function convertToObject(sourceFile: JsonSourceFile, errors: Push<Diagnostic>): any;
-    /**
-     * Parse the contents of a config file (tsconfig.json).
-     * @param json The contents of the config file to parse
-     * @param host Instance of ParseConfigHost used to enumerate files in folder.
-     * @param basePath A root directory to resolve relative path entries in the config
-     *    file to. e.g. outDir
-     */
-    function parseJsonConfigFileContent(json: any, host: ParseConfigHost, basePath: string, existingOptions?: CompilerOptions, configFileName?: string, resolutionStack?: Path[], extraFileExtensions?: ReadonlyArray<FileExtensionInfo>): ParsedCommandLine;
-    /**
-     * Parse the contents of a config file (tsconfig.json).
-     * @param jsonNode The contents of the config file to parse
-     * @param host Instance of ParseConfigHost used to enumerate files in folder.
-     * @param basePath A root directory to resolve relative path entries in the config
-     *    file to. e.g. outDir
-     */
-    function parseJsonSourceFileConfigFileContent(sourceFile: TsConfigSourceFile, host: ParseConfigHost, basePath: string, existingOptions?: CompilerOptions, configFileName?: string, resolutionStack?: Path[], extraFileExtensions?: ReadonlyArray<FileExtensionInfo>): ParsedCommandLine;
-    function convertCompilerOptionsFromJson(jsonOptions: any, basePath: string, configFileName?: string): {
-        options: CompilerOptions;
-        errors: Diagnostic[];
-    };
-    function convertTypeAcquisitionFromJson(jsonOptions: any, basePath: string, configFileName?: string): {
-        options: TypeAcquisition;
-        errors: Diagnostic[];
+    function createSolutionBuilder(compilerHost: CompilerHost, buildHost: BuildHost, rootNames: ReadonlyArray<string>, defaultOptions: BuildOptions, system?: System): {
+        buildAllProjects: () => number;
+        getUpToDateStatus: (project: ParsedCommandLine | undefined) => UpToDateStatus;
+        getUpToDateStatusOfFile: (configFileName: ResolvedConfigFileName) => UpToDateStatus;
+        cleanAllProjects: () => ExitStatus.Success | ExitStatus.DiagnosticsPresent_OutputsSkipped;
+        resetBuildContext: (opts?: BuildOptions) => void;
+        getBuildGraph: (configFileNames: ReadonlyArray<string>) => DependencyGraph | undefined;
+        invalidateProject: (configFileName: string) => void;
+        buildInvalidatedProjects: () => void;
+        buildDependentInvalidatedProjects: () => void;
+        resolveProjectName: (name: string) => ResolvedConfigFileName | undefined;
+        startWatching: () => void;
     };
 }
 declare namespace ts {
@@ -5346,5 +5526,5 @@ declare namespace ts {
      */
     function transform<T extends Node>(source: T | T[], transformers: TransformerFactory<T>[], compilerOptions?: CompilerOptions): TransformationResult<T>;
 }
-
-export = ts;
\ No newline at end of file
+//# sourceMappingURL=typescriptservices.d.ts.map
+export = ts
\ No newline at end of file
diff --git a/lib/typescript.js b/lib/typescript.js
index 407d12fd27915..2e2171e857686 100644
--- a/lib/typescript.js
+++ b/lib/typescript.js
@@ -2727,7 +2727,7 @@ var ts;
         SymbolFlags[SymbolFlags["AliasExcludes"] = 2097152] = "AliasExcludes";
         SymbolFlags[SymbolFlags["ModuleMember"] = 2623475] = "ModuleMember";
         SymbolFlags[SymbolFlags["ExportHasLocal"] = 944] = "ExportHasLocal";
-        SymbolFlags[SymbolFlags["HasExports"] = 1952] = "HasExports";
+        SymbolFlags[SymbolFlags["HasExports"] = 1955] = "HasExports";
         SymbolFlags[SymbolFlags["HasMembers"] = 6240] = "HasMembers";
         SymbolFlags[SymbolFlags["BlockScoped"] = 418] = "BlockScoped";
         SymbolFlags[SymbolFlags["PropertyOrAccessor"] = 98308] = "PropertyOrAccessor";
@@ -25548,7 +25548,7 @@ var ts;
             symbol.flags |= symbolFlags;
             node.symbol = symbol;
             symbol.declarations = ts.append(symbol.declarations, node);
-            if (symbolFlags & 1952 /* HasExports */ && !symbol.exports) {
+            if (symbolFlags & 1955 /* HasExports */ && !symbol.exports) {
                 symbol.exports = ts.createSymbolTable();
             }
             if (symbolFlags & 6240 /* HasMembers */ && !symbol.members) {
@@ -28917,7 +28917,7 @@ var ts;
                 }
                 var t = getTypeOfSymbol(symbol);
                 visitType(t); // Should handle members on classes and such
-                if (symbol.flags & 1952 /* HasExports */) {
+                if (symbol.flags & 1955 /* HasExports */) {
                     symbol.exports.forEach(visitSymbol);
                 }
                 ts.forEach(symbol.declarations, function (d) {
@@ -31215,7 +31215,7 @@ var ts;
             // The ES6 spec permits export * declarations in a module to circularly reference the module itself. For example,
             // module 'a' can 'export * from "b"' and 'b' can 'export * from "a"' without error.
             function visit(symbol) {
-                if (!(symbol && symbol.flags & 1952 /* HasExports */ && ts.pushIfUnique(visitedSymbols, symbol))) {
+                if (!(symbol && symbol.flags & 1955 /* HasExports */ && ts.pushIfUnique(visitedSymbols, symbol))) {
                     return;
                 }
                 var symbols = ts.cloneMap(symbol.exports);
diff --git a/lib/typescriptServices.d.ts b/lib/typescriptServices.d.ts
index 528315703332f..6611fbcd0df75 100644
--- a/lib/typescriptServices.d.ts
+++ b/lib/typescriptServices.d.ts
@@ -13,6 +13,12 @@ See the Apache Version 2.0 License for specific language governing permissions
 and limitations under the License.
 ***************************************************************************** */
 
+
+declare namespace ts {
+    const versionMajorMinor = "3.0";
+    /** The version of the TypeScript compiler release */
+    const version: string;
+}
 declare namespace ts {
     /**
      * Type of objects whose values are all of the same type.
@@ -22,6 +28,9 @@ declare namespace ts {
     interface MapLike<T> {
         [index: string]: T;
     }
+    interface SortedArray<T> extends Array<T> {
+        " __sortedArrayBrand": any;
+    }
     /** ES6 Map interface, only read methods included. */
     interface ReadonlyMap<T> {
         get(key: string): T | undefined;
@@ -52,6 +61,8 @@ declare namespace ts {
     interface Push<T> {
         push(...values: T[]): void;
     }
+}
+declare namespace ts {
     type Path = string & {
         __pathBrand: any;
     };
@@ -2071,7 +2082,7 @@ declare namespace ts {
         AliasExcludes = 2097152,
         ModuleMember = 2623475,
         ExportHasLocal = 944,
-        HasExports = 1952,
+        HasExports = 1955,
         HasMembers = 6240,
         BlockScoped = 418,
         PropertyOrAccessor = 98308,
@@ -2906,9 +2917,6 @@ declare namespace ts {
         span: TextSpan;
         newLength: number;
     }
-    interface SortedArray<T> extends Array<T> {
-        " __sortedArrayBrand": any;
-    }
     interface SyntaxList extends Node {
         _children: Node[];
     }
@@ -2978,15 +2986,6 @@ declare namespace ts {
         IndexSignatureParameters = 4432
     }
 }
-declare namespace ts {
-    const versionMajorMinor = "3.0";
-    /** The version of the TypeScript compiler release */
-    const version: string;
-}
-declare namespace ts {
-    function isExternalModuleNameRelative(moduleName: string): boolean;
-    function sortAndDeduplicateDiagnostics<T extends Diagnostic>(diagnostics: ReadonlyArray<T>): T[];
-}
 declare function setTimeout(handler: (...args: any[]) => void, timeout: number): any;
 declare function clearTimeout(handle: any): void;
 declare namespace ts {
@@ -3099,6 +3098,11 @@ declare namespace ts {
     function isIdentifierPart(ch: number, languageVersion: ScriptTarget | undefined): boolean;
     function createScanner(languageVersion: ScriptTarget, skipTrivia: boolean, languageVariant?: LanguageVariant, textInitial?: string, onError?: ErrorCallback, start?: number, length?: number): Scanner;
 }
+/** Non-internal stuff goes here */
+declare namespace ts {
+    function isExternalModuleNameRelative(moduleName: string): boolean;
+    function sortAndDeduplicateDiagnostics<T extends Diagnostic>(diagnostics: ReadonlyArray<T>): T[];
+}
 declare namespace ts {
     function getDefaultLibFileName(options: CompilerOptions): string;
     function textSpanEnd(span: TextSpan): number;
@@ -3484,6 +3488,79 @@ declare namespace ts {
     function isExternalModule(file: SourceFile): boolean;
     function updateSourceFile(sourceFile: SourceFile, newText: string, textChangeRange: TextChangeRange, aggressiveChecks?: boolean): SourceFile;
 }
+declare namespace ts {
+    function parseCommandLine(commandLine: ReadonlyArray<string>, readFile?: (path: string) => string | undefined): ParsedCommandLine;
+    type DiagnosticReporter = (diagnostic: Diagnostic) => void;
+    /**
+     * Reports config file diagnostics
+     */
+    interface ConfigFileDiagnosticsReporter {
+        /**
+         * Reports unrecoverable error when parsing config file
+         */
+        onUnRecoverableConfigFileDiagnostic: DiagnosticReporter;
+    }
+    /**
+     * Interface extending ParseConfigHost to support ParseConfigFile that reads config file and reports errors
+     */
+    interface ParseConfigFileHost extends ParseConfigHost, ConfigFileDiagnosticsReporter {
+        getCurrentDirectory(): string;
+    }
+    /**
+     * Reads the config file, reports errors if any and exits if the config file cannot be found
+     */
+    function getParsedCommandLineOfConfigFile(configFileName: string, optionsToExtend: CompilerOptions, host: ParseConfigFileHost): ParsedCommandLine | undefined;
+    /**
+     * Read tsconfig.json file
+     * @param fileName The path to the config file
+     */
+    function readConfigFile(fileName: string, readFile: (path: string) => string | undefined): {
+        config?: any;
+        error?: Diagnostic;
+    };
+    /**
+     * Parse the text of the tsconfig.json file
+     * @param fileName The path to the config file
+     * @param jsonText The text of the config file
+     */
+    function parseConfigFileTextToJson(fileName: string, jsonText: string): {
+        config?: any;
+        error?: Diagnostic;
+    };
+    /**
+     * Read tsconfig.json file
+     * @param fileName The path to the config file
+     */
+    function readJsonConfigFile(fileName: string, readFile: (path: string) => string | undefined): TsConfigSourceFile;
+    /**
+     * Convert the json syntax tree into the json value
+     */
+    function convertToObject(sourceFile: JsonSourceFile, errors: Push<Diagnostic>): any;
+    /**
+     * Parse the contents of a config file (tsconfig.json).
+     * @param json The contents of the config file to parse
+     * @param host Instance of ParseConfigHost used to enumerate files in folder.
+     * @param basePath A root directory to resolve relative path entries in the config
+     *    file to. e.g. outDir
+     */
+    function parseJsonConfigFileContent(json: any, host: ParseConfigHost, basePath: string, existingOptions?: CompilerOptions, configFileName?: string, resolutionStack?: Path[], extraFileExtensions?: ReadonlyArray<FileExtensionInfo>): ParsedCommandLine;
+    /**
+     * Parse the contents of a config file (tsconfig.json).
+     * @param jsonNode The contents of the config file to parse
+     * @param host Instance of ParseConfigHost used to enumerate files in folder.
+     * @param basePath A root directory to resolve relative path entries in the config
+     *    file to. e.g. outDir
+     */
+    function parseJsonSourceFileConfigFileContent(sourceFile: TsConfigSourceFile, host: ParseConfigHost, basePath: string, existingOptions?: CompilerOptions, configFileName?: string, resolutionStack?: Path[], extraFileExtensions?: ReadonlyArray<FileExtensionInfo>): ParsedCommandLine;
+    function convertCompilerOptionsFromJson(jsonOptions: any, basePath: string, configFileName?: string): {
+        options: CompilerOptions;
+        errors: Diagnostic[];
+    };
+    function convertTypeAcquisitionFromJson(jsonOptions: any, basePath: string, configFileName?: string): {
+        options: TypeAcquisition;
+        errors: Diagnostic[];
+    };
+}
 declare namespace ts {
     function getEffectiveTypeRoots(options: CompilerOptions, host: GetEffectiveTypeRootsHost): string[] | undefined;
     /**
@@ -4311,76 +4388,179 @@ declare namespace ts {
     function createWatchProgram<T extends BuilderProgram>(host: WatchCompilerHostOfConfigFile<T>): WatchOfConfigFile<T>;
 }
 declare namespace ts {
-    function parseCommandLine(commandLine: ReadonlyArray<string>, readFile?: (path: string) => string | undefined): ParsedCommandLine;
-    type DiagnosticReporter = (diagnostic: Diagnostic) => void;
     /**
-     * Reports config file diagnostics
+     * Branded string for keeping track of when we've turned an ambiguous path
+     * specified like "./blah" to an absolute path to an actual
+     * tsconfig file, e.g. "/root/blah/tsconfig.json"
      */
-    interface ConfigFileDiagnosticsReporter {
-        /**
-         * Reports unrecoverable error when parsing config file
-         */
-        onUnRecoverableConfigFileDiagnostic: DiagnosticReporter;
+    type ResolvedConfigFileName = string & {
+        _isResolvedConfigFileName: never;
+    };
+    interface BuildHost {
+        verbose(diag: DiagnosticMessage, ...args: string[]): void;
+        error(diag: DiagnosticMessage, ...args: string[]): void;
+        errorDiagnostic(diag: Diagnostic): void;
+        message(diag: DiagnosticMessage, ...args: string[]): void;
     }
     /**
-     * Interface extending ParseConfigHost to support ParseConfigFile that reads config file and reports errors
+     * A BuildContext tracks what's going on during the course of a build.
+     *
+     * Callers may invoke any number of build requests within the same context;
+     * until the context is reset, each project will only be built at most once.
+     *
+     * Example: In a standard setup where project B depends on project A, and both are out of date,
+     * a failed build of A will result in A remaining out of date. When we try to build
+     * B, we should immediately bail instead of recomputing A's up-to-date status again.
+     *
+     * This also matters for performing fast (i.e. fake) downstream builds of projects
+     * when their upstream .d.ts files haven't changed content (but have newer timestamps)
      */
-    interface ParseConfigFileHost extends ParseConfigHost, ConfigFileDiagnosticsReporter {
-        getCurrentDirectory(): string;
+    interface BuildContext {
+        options: BuildOptions;
+        /**
+         * Map from output file name to its pre-build timestamp
+         */
+        unchangedOutputs: FileMap<Date>;
+        /**
+         * Map from config file name to up-to-date status
+         */
+        projectStatus: FileMap<UpToDateStatus>;
+        invalidatedProjects: FileMap<true>;
+        queuedProjects: FileMap<true>;
+        missingRoots: Map<true>;
+    }
+    type Mapper = ReturnType<typeof createDependencyMapper>;
+    interface DependencyGraph {
+        buildQueue: ResolvedConfigFileName[];
+        dependencyMap: Mapper;
+    }
+    interface BuildOptions {
+        dry: boolean;
+        force: boolean;
+        verbose: boolean;
+    }
+    enum UpToDateStatusType {
+        Unbuildable = 0,
+        UpToDate = 1,
+        /**
+         * The project appears out of date because its upstream inputs are newer than its outputs,
+         * but all of its outputs are actually newer than the previous identical outputs of its (.d.ts) inputs.
+         * This means we can Pseudo-build (just touch timestamps), as if we had actually built this project.
+         */
+        UpToDateWithUpstreamTypes = 2,
+        OutputMissing = 3,
+        OutOfDateWithSelf = 4,
+        OutOfDateWithUpstream = 5,
+        UpstreamOutOfDate = 6,
+        UpstreamBlocked = 7,
+        /**
+         * Projects with no outputs (i.e. "solution" files)
+         */
+        ContainerOnly = 8
     }
-    /**
-     * Reads the config file, reports errors if any and exits if the config file cannot be found
-     */
-    function getParsedCommandLineOfConfigFile(configFileName: string, optionsToExtend: CompilerOptions, host: ParseConfigFileHost): ParsedCommandLine | undefined;
-    /**
-     * Read tsconfig.json file
-     * @param fileName The path to the config file
-     */
-    function readConfigFile(fileName: string, readFile: (path: string) => string | undefined): {
-        config?: any;
-        error?: Diagnostic;
-    };
-    /**
-     * Parse the text of the tsconfig.json file
-     * @param fileName The path to the config file
-     * @param jsonText The text of the config file
-     */
-    function parseConfigFileTextToJson(fileName: string, jsonText: string): {
-        config?: any;
-        error?: Diagnostic;
+    type UpToDateStatus = Status.Unbuildable | Status.UpToDate | Status.OutputMissing | Status.OutOfDateWithSelf | Status.OutOfDateWithUpstream | Status.UpstreamOutOfDate | Status.UpstreamBlocked | Status.ContainerOnly;
+    namespace Status {
+        /**
+         * The project can't be built at all in its current state. For example,
+         * its config file cannot be parsed, or it has a syntax error or missing file
+         */
+        interface Unbuildable {
+            type: UpToDateStatusType.Unbuildable;
+            reason: string;
+        }
+        /**
+         * This project doesn't have any outputs, so "is it up to date" is a meaningless question.
+         */
+        interface ContainerOnly {
+            type: UpToDateStatusType.ContainerOnly;
+        }
+        /**
+         * The project is up to date with respect to its inputs.
+         * We track what the newest input file is.
+         */
+        interface UpToDate {
+            type: UpToDateStatusType.UpToDate | UpToDateStatusType.UpToDateWithUpstreamTypes;
+            newestInputFileTime: Date;
+            newestInputFileName: string;
+            newestDeclarationFileContentChangedTime: Date;
+            newestOutputFileTime: Date;
+            newestOutputFileName: string;
+            oldestOutputFileName: string;
+        }
+        /**
+         * One or more of the outputs of the project does not exist.
+         */
+        interface OutputMissing {
+            type: UpToDateStatusType.OutputMissing;
+            /**
+             * The name of the first output file that didn't exist
+             */
+            missingOutputFileName: string;
+        }
+        /**
+         * One or more of the project's outputs is older than its newest input.
+         */
+        interface OutOfDateWithSelf {
+            type: UpToDateStatusType.OutOfDateWithSelf;
+            outOfDateOutputFileName: string;
+            newerInputFileName: string;
+        }
+        /**
+         * This project depends on an out-of-date project, so shouldn't be built yet
+         */
+        interface UpstreamOutOfDate {
+            type: UpToDateStatusType.UpstreamOutOfDate;
+            upstreamProjectName: string;
+        }
+        /**
+         * This project depends an upstream project with build errors
+         */
+        interface UpstreamBlocked {
+            type: UpToDateStatusType.UpstreamBlocked;
+            upstreamProjectName: string;
+        }
+        /**
+         * One or more of the project's outputs is older than the newest output of
+         * an upstream project.
+         */
+        interface OutOfDateWithUpstream {
+            type: UpToDateStatusType.OutOfDateWithUpstream;
+            outOfDateOutputFileName: string;
+            newerProjectName: string;
+        }
+    }
+    interface FileMap<T> {
+        setValue(fileName: string, value: T): void;
+        getValue(fileName: string): T | never;
+        getValueOrUndefined(fileName: string): T | undefined;
+        hasKey(fileName: string): boolean;
+        removeKey(fileName: string): void;
+        getKeys(): string[];
+    }
+    function createDependencyMapper(): {
+        addReference: (childConfigFileName: ResolvedConfigFileName, parentConfigFileName: ResolvedConfigFileName) => void;
+        getReferencesTo: (parentConfigFileName: ResolvedConfigFileName) => ResolvedConfigFileName[];
+        getReferencesOf: (childConfigFileName: ResolvedConfigFileName) => ResolvedConfigFileName[];
+        getKeys: () => ReadonlyArray<ResolvedConfigFileName>;
     };
+    function createBuildContext(options: BuildOptions): BuildContext;
+    function performBuild(args: string[], compilerHost: CompilerHost, buildHost: BuildHost, system?: System): number | undefined;
     /**
-     * Read tsconfig.json file
-     * @param fileName The path to the config file
-     */
-    function readJsonConfigFile(fileName: string, readFile: (path: string) => string | undefined): TsConfigSourceFile;
-    /**
-     * Convert the json syntax tree into the json value
+     * A SolutionBuilder has an immutable set of rootNames that are the "entry point" projects, but
+     * can dynamically add/remove other projects based on changes on the rootNames' references
      */
-    function convertToObject(sourceFile: JsonSourceFile, errors: Push<Diagnostic>): any;
-    /**
-     * Parse the contents of a config file (tsconfig.json).
-     * @param json The contents of the config file to parse
-     * @param host Instance of ParseConfigHost used to enumerate files in folder.
-     * @param basePath A root directory to resolve relative path entries in the config
-     *    file to. e.g. outDir
-     */
-    function parseJsonConfigFileContent(json: any, host: ParseConfigHost, basePath: string, existingOptions?: CompilerOptions, configFileName?: string, resolutionStack?: Path[], extraFileExtensions?: ReadonlyArray<FileExtensionInfo>): ParsedCommandLine;
-    /**
-     * Parse the contents of a config file (tsconfig.json).
-     * @param jsonNode The contents of the config file to parse
-     * @param host Instance of ParseConfigHost used to enumerate files in folder.
-     * @param basePath A root directory to resolve relative path entries in the config
-     *    file to. e.g. outDir
-     */
-    function parseJsonSourceFileConfigFileContent(sourceFile: TsConfigSourceFile, host: ParseConfigHost, basePath: string, existingOptions?: CompilerOptions, configFileName?: string, resolutionStack?: Path[], extraFileExtensions?: ReadonlyArray<FileExtensionInfo>): ParsedCommandLine;
-    function convertCompilerOptionsFromJson(jsonOptions: any, basePath: string, configFileName?: string): {
-        options: CompilerOptions;
-        errors: Diagnostic[];
-    };
-    function convertTypeAcquisitionFromJson(jsonOptions: any, basePath: string, configFileName?: string): {
-        options: TypeAcquisition;
-        errors: Diagnostic[];
+    function createSolutionBuilder(compilerHost: CompilerHost, buildHost: BuildHost, rootNames: ReadonlyArray<string>, defaultOptions: BuildOptions, system?: System): {
+        buildAllProjects: () => number;
+        getUpToDateStatus: (project: ParsedCommandLine | undefined) => UpToDateStatus;
+        getUpToDateStatusOfFile: (configFileName: ResolvedConfigFileName) => UpToDateStatus;
+        cleanAllProjects: () => ExitStatus.Success | ExitStatus.DiagnosticsPresent_OutputsSkipped;
+        resetBuildContext: (opts?: BuildOptions) => void;
+        getBuildGraph: (configFileNames: ReadonlyArray<string>) => DependencyGraph | undefined;
+        invalidateProject: (configFileName: string) => void;
+        buildInvalidatedProjects: () => void;
+        buildDependentInvalidatedProjects: () => void;
+        resolveProjectName: (name: string) => ResolvedConfigFileName | undefined;
+        startWatching: () => void;
     };
 }
 declare namespace ts {
@@ -5346,3 +5526,4 @@ declare namespace ts {
      */
     function transform<T extends Node>(source: T | T[], transformers: TransformerFactory<T>[], compilerOptions?: CompilerOptions): TransformationResult<T>;
 }
+//# sourceMappingURL=typescriptservices.d.ts.map
\ No newline at end of file
diff --git a/lib/typescriptServices.js b/lib/typescriptServices.js
index 407d12fd27915..2e2171e857686 100644
--- a/lib/typescriptServices.js
+++ b/lib/typescriptServices.js
@@ -2727,7 +2727,7 @@ var ts;
         SymbolFlags[SymbolFlags["AliasExcludes"] = 2097152] = "AliasExcludes";
         SymbolFlags[SymbolFlags["ModuleMember"] = 2623475] = "ModuleMember";
         SymbolFlags[SymbolFlags["ExportHasLocal"] = 944] = "ExportHasLocal";
-        SymbolFlags[SymbolFlags["HasExports"] = 1952] = "HasExports";
+        SymbolFlags[SymbolFlags["HasExports"] = 1955] = "HasExports";
         SymbolFlags[SymbolFlags["HasMembers"] = 6240] = "HasMembers";
         SymbolFlags[SymbolFlags["BlockScoped"] = 418] = "BlockScoped";
         SymbolFlags[SymbolFlags["PropertyOrAccessor"] = 98308] = "PropertyOrAccessor";
@@ -25548,7 +25548,7 @@ var ts;
             symbol.flags |= symbolFlags;
             node.symbol = symbol;
             symbol.declarations = ts.append(symbol.declarations, node);
-            if (symbolFlags & 1952 /* HasExports */ && !symbol.exports) {
+            if (symbolFlags & 1955 /* HasExports */ && !symbol.exports) {
                 symbol.exports = ts.createSymbolTable();
             }
             if (symbolFlags & 6240 /* HasMembers */ && !symbol.members) {
@@ -28917,7 +28917,7 @@ var ts;
                 }
                 var t = getTypeOfSymbol(symbol);
                 visitType(t); // Should handle members on classes and such
-                if (symbol.flags & 1952 /* HasExports */) {
+                if (symbol.flags & 1955 /* HasExports */) {
                     symbol.exports.forEach(visitSymbol);
                 }
                 ts.forEach(symbol.declarations, function (d) {
@@ -31215,7 +31215,7 @@ var ts;
             // The ES6 spec permits export * declarations in a module to circularly reference the module itself. For example,
             // module 'a' can 'export * from "b"' and 'b' can 'export * from "a"' without error.
             function visit(symbol) {
-                if (!(symbol && symbol.flags & 1952 /* HasExports */ && ts.pushIfUnique(visitedSymbols, symbol))) {
+                if (!(symbol && symbol.flags & 1955 /* HasExports */ && ts.pushIfUnique(visitedSymbols, symbol))) {
                     return;
                 }
                 var symbols = ts.cloneMap(symbol.exports);
diff --git a/lib/typingsInstaller.js b/lib/typingsInstaller.js
index 9ce4b145af0be..ca368f2fba54f 100644
--- a/lib/typingsInstaller.js
+++ b/lib/typingsInstaller.js
@@ -1,3 +1,19 @@
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved. 
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0  
+ 
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
+MERCHANTABLITY OR NON-INFRINGEMENT. 
+ 
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+
+
 "use strict";
 var __extends = (this && this.__extends) || (function () {
     var extendStatics = Object.setPrototypeOf ||
@@ -18,99 +34,18 @@ var __assign = (this && this.__assign) || Object.assign || function(t) {
     return t;
 };
 "use strict";
-/*@internal*/
-var ts;
-(function (ts) {
-    /** Gets a timestamp with (at least) ms resolution */
-    ts.timestamp = typeof performance !== "undefined" && performance.now ? function () { return performance.now(); } : Date.now ? Date.now : function () { return +(new Date()); };
-})(ts || (ts = {}));
-/*@internal*/
-/** Performance measurements for the compiler. */
-(function (ts) {
-    var performance;
-    (function (performance) {
-        // NOTE: cannot use ts.noop as core.ts loads after this
-        var profilerEvent = typeof onProfilerEvent === "function" && onProfilerEvent.profiler === true ? onProfilerEvent : function () { };
-        var enabled = false;
-        var profilerStart = 0;
-        var counts;
-        var marks;
-        var measures;
-        /**
-         * Marks a performance event.
-         *
-         * @param markName The name of the mark.
-         */
-        function mark(markName) {
-            if (enabled) {
-                marks.set(markName, ts.timestamp());
-                counts.set(markName, (counts.get(markName) || 0) + 1);
-                profilerEvent(markName);
-            }
-        }
-        performance.mark = mark;
-        /**
-         * Adds a performance measurement with the specified name.
-         *
-         * @param measureName The name of the performance measurement.
-         * @param startMarkName The name of the starting mark. If not supplied, the point at which the
-         *      profiler was enabled is used.
-         * @param endMarkName The name of the ending mark. If not supplied, the current timestamp is
-         *      used.
-         */
-        function measure(measureName, startMarkName, endMarkName) {
-            if (enabled) {
-                var end = endMarkName && marks.get(endMarkName) || ts.timestamp();
-                var start = startMarkName && marks.get(startMarkName) || profilerStart;
-                measures.set(measureName, (measures.get(measureName) || 0) + (end - start));
-            }
-        }
-        performance.measure = measure;
-        /**
-         * Gets the number of times a marker was encountered.
-         *
-         * @param markName The name of the mark.
-         */
-        function getCount(markName) {
-            return counts && counts.get(markName) || 0;
-        }
-        performance.getCount = getCount;
-        /**
-         * Gets the total duration of all measurements with the supplied name.
-         *
-         * @param measureName The name of the measure whose durations should be accumulated.
-         */
-        function getDuration(measureName) {
-            return measures && measures.get(measureName) || 0;
-        }
-        performance.getDuration = getDuration;
-        /**
-         * Iterate over each measure, performing some action
-         *
-         * @param cb The action to perform for each measure
-         */
-        function forEachMeasure(cb) {
-            measures.forEach(function (measure, key) {
-                cb(key, measure);
-            });
-        }
-        performance.forEachMeasure = forEachMeasure;
-        /** Enables (and resets) performance measurements for the compiler. */
-        function enable() {
-            counts = ts.createMap();
-            marks = ts.createMap();
-            measures = ts.createMap();
-            enabled = true;
-            profilerStart = ts.timestamp();
-        }
-        performance.enable = enable;
-        /** Disables performance measurements for the compiler. */
-        function disable() {
-            enabled = false;
-        }
-        performance.disable = disable;
-    })(performance = ts.performance || (ts.performance = {}));
-})(ts || (ts = {}));
+var __assign = (this && this.__assign) || Object.assign || function(t) {
+    for (var s, i = 1, n = arguments.length; i < n; i++) {
+        s = arguments[i];
+        for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
+            t[p] = s[p];
+    }
+    return t;
+};
+var __makeTemplateObject = (this && this.__makeTemplateObject) || function (cooked, raw) {
+    if (Object.defineProperty) { Object.defineProperty(cooked, "raw", { value: raw }); } else { cooked.raw = raw; }
+    return cooked;
+};
 var ts;
 (function (ts) {
     // WARNING: The script `configureNightly.ts` uses a regexp to parse out these values.
@@ -119,14 +54,17 @@ var ts;
     /** The version of the TypeScript compiler release */
     ts.version = ts.versionMajorMinor + ".0-dev";
 })(ts || (ts = {}));
-/* @internal */
 (function (ts) {
+    /* @internal */
     var Comparison;
     (function (Comparison) {
         Comparison[Comparison["LessThan"] = -1] = "LessThan";
         Comparison[Comparison["EqualTo"] = 0] = "EqualTo";
         Comparison[Comparison["GreaterThan"] = 1] = "GreaterThan";
     })(Comparison = ts.Comparison || (ts.Comparison = {}));
+})(ts || (ts = {}));
+/* @internal */
+(function (ts) {
     /** Create a MapLike with good performance. */
     function createDictionaryObject() {
         var map = Object.create(/*prototype*/ null); // tslint:disable-line:no-null-keyword
@@ -1988,16 +1926,99 @@ var ts;
     }
     ts.enumerateInsertsAndDeletes = enumerateInsertsAndDeletes;
 })(ts || (ts = {}));
-//# sourceMappingURL=core.js.map
-"use strict";
-var __assign = (this && this.__assign) || Object.assign || function(t) {
-    for (var s, i = 1, n = arguments.length; i < n; i++) {
-        s = arguments[i];
-        for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
-            t[p] = s[p];
-    }
-    return t;
-};
+/*@internal*/
+var ts;
+(function (ts) {
+    /** Gets a timestamp with (at least) ms resolution */
+    ts.timestamp = typeof performance !== "undefined" && performance.now ? function () { return performance.now(); } : Date.now ? Date.now : function () { return +(new Date()); };
+})(ts || (ts = {}));
+/*@internal*/
+/** Performance measurements for the compiler. */
+(function (ts) {
+    var performance;
+    (function (performance) {
+        // NOTE: cannot use ts.noop as core.ts loads after this
+        var profilerEvent = typeof onProfilerEvent === "function" && onProfilerEvent.profiler === true ? onProfilerEvent : function () { };
+        var enabled = false;
+        var profilerStart = 0;
+        var counts;
+        var marks;
+        var measures;
+        /**
+         * Marks a performance event.
+         *
+         * @param markName The name of the mark.
+         */
+        function mark(markName) {
+            if (enabled) {
+                marks.set(markName, ts.timestamp());
+                counts.set(markName, (counts.get(markName) || 0) + 1);
+                profilerEvent(markName);
+            }
+        }
+        performance.mark = mark;
+        /**
+         * Adds a performance measurement with the specified name.
+         *
+         * @param measureName The name of the performance measurement.
+         * @param startMarkName The name of the starting mark. If not supplied, the point at which the
+         *      profiler was enabled is used.
+         * @param endMarkName The name of the ending mark. If not supplied, the current timestamp is
+         *      used.
+         */
+        function measure(measureName, startMarkName, endMarkName) {
+            if (enabled) {
+                var end = endMarkName && marks.get(endMarkName) || ts.timestamp();
+                var start = startMarkName && marks.get(startMarkName) || profilerStart;
+                measures.set(measureName, (measures.get(measureName) || 0) + (end - start));
+            }
+        }
+        performance.measure = measure;
+        /**
+         * Gets the number of times a marker was encountered.
+         *
+         * @param markName The name of the mark.
+         */
+        function getCount(markName) {
+            return counts && counts.get(markName) || 0;
+        }
+        performance.getCount = getCount;
+        /**
+         * Gets the total duration of all measurements with the supplied name.
+         *
+         * @param measureName The name of the measure whose durations should be accumulated.
+         */
+        function getDuration(measureName) {
+            return measures && measures.get(measureName) || 0;
+        }
+        performance.getDuration = getDuration;
+        /**
+         * Iterate over each measure, performing some action
+         *
+         * @param cb The action to perform for each measure
+         */
+        function forEachMeasure(cb) {
+            measures.forEach(function (measure, key) {
+                cb(key, measure);
+            });
+        }
+        performance.forEachMeasure = forEachMeasure;
+        /** Enables (and resets) performance measurements for the compiler. */
+        function enable() {
+            counts = ts.createMap();
+            marks = ts.createMap();
+            measures = ts.createMap();
+            enabled = true;
+            profilerStart = ts.timestamp();
+        }
+        performance.enable = enable;
+        /** Disables performance measurements for the compiler. */
+        function disable() {
+            enabled = false;
+        }
+        performance.disable = disable;
+    })(performance = ts.performance || (ts.performance = {}));
+})(ts || (ts = {}));
 var ts;
 (function (ts) {
     // token > SyntaxKind.Identifier => token is a keyword
@@ -2731,7 +2752,7 @@ var ts;
         SymbolFlags[SymbolFlags["AliasExcludes"] = 2097152] = "AliasExcludes";
         SymbolFlags[SymbolFlags["ModuleMember"] = 2623475] = "ModuleMember";
         SymbolFlags[SymbolFlags["ExportHasLocal"] = 944] = "ExportHasLocal";
-        SymbolFlags[SymbolFlags["HasExports"] = 1952] = "HasExports";
+        SymbolFlags[SymbolFlags["HasExports"] = 1955] = "HasExports";
         SymbolFlags[SymbolFlags["HasMembers"] = 6240] = "HasMembers";
         SymbolFlags[SymbolFlags["BlockScoped"] = 418] = "BlockScoped";
         SymbolFlags[SymbolFlags["PropertyOrAccessor"] = 98308] = "PropertyOrAccessor";
@@ -4274,8 +4295,8 @@ var ts;
                     var entries = _fs.readdirSync(path || ".").sort();
                     var files = [];
                     var directories = [];
-                    for (var _i = 0, entries_1 = entries; _i < entries_1.length; _i++) {
-                        var entry = entries_1[_i];
+                    for (var _i = 0, entries_2 = entries; _i < entries_2.length; _i++) {
+                        var entry = entries_2[_i];
                         // This is necessary because on some file system node fails to exclude
                         // "." and "..". See https://github.com/nodejs/node/issues/4002
                         if (entry === "." || entry === "..") {
@@ -4455,7 +4476,7 @@ var ts;
     }
 })(ts || (ts = {}));
 // <auto-generated />
-// generated from './diagnosticInformationMap.generated.ts' by 'src\parser'
+// generated from './diagnosticInformationMap.generated.ts' by 'src\compiler'
 /* @internal */
 var ts;
 (function (ts) {
@@ -7449,11 +7470,6 @@ var ts;
 /** Non-internal stuff goes here */
 var ts;
 (function (ts) {
-    ts.emptyArray = [];
-    function closeFileWatcher(watcher) {
-        watcher.close();
-    }
-    ts.closeFileWatcher = closeFileWatcher;
     function isExternalModuleNameRelative(moduleName) {
         // TypeScript 1.0 spec (April 2014): 11.2.1
         // An external module name is "relative" if the first term is "." or "..".
@@ -7465,20 +7481,10 @@ var ts;
         return ts.sortAndDeduplicate(diagnostics, ts.compareDiagnostics);
     }
     ts.sortAndDeduplicateDiagnostics = sortAndDeduplicateDiagnostics;
-    function toPath(fileName, basePath, getCanonicalFileName) {
-        var nonCanonicalizedPath = ts.isRootedDiskPath(fileName)
-            ? ts.normalizePath(fileName)
-            : ts.getNormalizedAbsolutePath(fileName, basePath);
-        return getCanonicalFileName(nonCanonicalizedPath);
-    }
-    ts.toPath = toPath;
-    function hasEntries(map) {
-        return !!map && !!map.size;
-    }
-    ts.hasEntries = hasEntries;
 })(ts || (ts = {}));
 /* @internal */
 (function (ts) {
+    ts.emptyArray = [];
     ts.resolvingEmptyArray = [];
     ts.emptyMap = ts.createMap();
     ts.emptyUnderscoreEscapedMap = ts.emptyMap;
@@ -7501,6 +7507,10 @@ var ts;
         return new ts.MapCtr();
     }
     ts.createUnderscoreEscapedMap = createUnderscoreEscapedMap;
+    function hasEntries(map) {
+        return !!map && !!map.size;
+    }
+    ts.hasEntries = hasEntries;
     function createSymbolTable(symbols) {
         var result = ts.createMap();
         if (symbols) {
@@ -7547,6 +7557,13 @@ var ts;
             reportPrivateInBaseOfClassExpression: ts.noop,
         };
     }
+    function toPath(fileName, basePath, getCanonicalFileName) {
+        var nonCanonicalizedPath = ts.isRootedDiskPath(fileName)
+            ? ts.normalizePath(fileName)
+            : ts.getNormalizedAbsolutePath(fileName, basePath);
+        return getCanonicalFileName(nonCanonicalizedPath);
+    }
+    ts.toPath = toPath;
     function changesAffectModuleResolution(oldOptions, newOptions) {
         return !oldOptions ||
             (oldOptions.module !== newOptions.module) ||
@@ -10376,7 +10393,7 @@ var ts;
      */
     function getExternalModuleNameFromPath(host, fileName, referencePath) {
         var getCanonicalFileName = function (f) { return host.getCanonicalFileName(f); };
-        var dir = ts.toPath(referencePath ? ts.getDirectoryPath(referencePath) : host.getCommonSourceDirectory(), host.getCurrentDirectory(), getCanonicalFileName);
+        var dir = toPath(referencePath ? ts.getDirectoryPath(referencePath) : host.getCommonSourceDirectory(), host.getCurrentDirectory(), getCanonicalFileName);
         var filePath = ts.getNormalizedAbsolutePath(fileName, host.getCurrentDirectory());
         var relativePath = ts.getRelativePathToDirectoryOrUrl(dir, filePath, dir, getCanonicalFileName, /*isAbsolutePathAnUrl*/ false);
         var extensionless = ts.removeFileExtension(relativePath);
@@ -11284,6 +11301,10 @@ var ts;
         return options.watch && options.hasOwnProperty("watch");
     }
     ts.isWatchSet = isWatchSet;
+    function closeFileWatcher(watcher) {
+        watcher.close();
+    }
+    ts.closeFileWatcher = closeFileWatcher;
     function getCheckFlags(symbol) {
         return symbol.flags & 33554432 /* Transient */ ? symbol.checkFlags : 0;
     }
@@ -13706,6 +13727,9 @@ var ts;
         return node.kind === 9 /* StringLiteral */ || node.kind === 13 /* NoSubstitutionTemplateLiteral */;
     }
     ts.isStringLiteralLike = isStringLiteralLike;
+})(ts || (ts = {}));
+/* @internal */
+(function (ts) {
     /** @internal */
     function isNamedImportsOrExports(node) {
         return node.kind === 247 /* NamedImports */ || node.kind === 251 /* NamedExports */;
@@ -13722,7 +13746,7 @@ var ts;
     }
     function Type(checker, flags) {
         this.flags = flags;
-        if (Debug.isDebugging) {
+        if (ts.Debug.isDebugging) {
             this.checker = checker;
         }
     }
@@ -13753,9 +13777,10 @@ var ts;
         getSignatureConstructor: function () { return Signature; },
         getSourceMapSourceConstructor: function () { return SourceMapSource; },
     };
+    /* @internal */
     function formatStringFromArgs(text, args, baseIndex) {
         if (baseIndex === void 0) { baseIndex = 0; }
-        return text.replace(/{(\d+)}/g, function (_match, index) { return Debug.assertDefined(args[+index + baseIndex]); });
+        return text.replace(/{(\d+)}/g, function (_match, index) { return ts.Debug.assertDefined(args[+index + baseIndex]); });
     }
     ts.formatStringFromArgs = formatStringFromArgs;
     function getLocaleSpecificMessage(message) {
@@ -13763,11 +13788,11 @@ var ts;
     }
     ts.getLocaleSpecificMessage = getLocaleSpecificMessage;
     function createFileDiagnostic(file, start, length, message) {
-        Debug.assertGreaterThanOrEqual(start, 0);
-        Debug.assertGreaterThanOrEqual(length, 0);
+        ts.Debug.assertGreaterThanOrEqual(start, 0);
+        ts.Debug.assertGreaterThanOrEqual(length, 0);
         if (file) {
-            Debug.assertLessThanOrEqual(start, file.text.length);
-            Debug.assertLessThanOrEqual(start + length, file.text.length);
+            ts.Debug.assertLessThanOrEqual(start, file.text.length);
+            ts.Debug.assertLessThanOrEqual(start + length, file.text.length);
         }
         var text = getLocaleSpecificMessage(message);
         if (arguments.length > 4) {
@@ -13809,6 +13834,7 @@ var ts;
         };
     }
     ts.createCompilerDiagnostic = createCompilerDiagnostic;
+    /* @internal */
     function createCompilerDiagnosticFromMessageChain(chain) {
         return {
             file: undefined,
@@ -13845,6 +13871,7 @@ var ts;
     function getDiagnosticFilePath(diagnostic) {
         return diagnostic.file ? diagnostic.file.path : undefined;
     }
+    /* @internal */
     function compareDiagnostics(d1, d2) {
         return ts.compareStringsCaseSensitive(getDiagnosticFilePath(d1), getDiagnosticFilePath(d2)) ||
             ts.compareValues(d1.start, d2.start) ||
@@ -14059,7 +14086,7 @@ var ts;
     ts.getRootLength = getRootLength;
     // TODO(rbuckton): replace references with `resolvePath`
     function normalizePath(path) {
-        return resolvePath(path);
+        return ts.resolvePath(path);
     }
     ts.normalizePath = normalizePath;
     function normalizePathAndParts(path) {
@@ -14067,7 +14094,7 @@ var ts;
         var _a = reducePathComponents(getPathComponents(path)), root = _a[0], parts = _a.slice(1);
         if (parts.length) {
             var joinedParts = root + parts.join(ts.directorySeparator);
-            return { path: hasTrailingDirectorySeparator(path) ? ensureTrailingDirectorySeparator(joinedParts) : joinedParts, parts: parts };
+            return { path: ts.hasTrailingDirectorySeparator(path) ? ts.ensureTrailingDirectorySeparator(joinedParts) : joinedParts, parts: parts };
         }
         else {
             return { path: root, parts: parts };
@@ -14082,7 +14109,7 @@ var ts;
             return path;
         // return the leading portion of the path up to the last (non-terminal) directory separator
         // but not including any trailing directory separator.
-        path = removeTrailingDirectorySeparator(path);
+        path = ts.removeTrailingDirectorySeparator(path);
         return path.slice(0, Math.max(rootLength, path.lastIndexOf(ts.directorySeparator)));
     }
     ts.getDirectoryPath = getDirectoryPath;
@@ -14110,10 +14137,11 @@ var ts;
         return rootLength > 0 && rootLength === path.length;
     }
     ts.isDiskPathRoot = isDiskPathRoot;
+    /* @internal */
     function convertToRelativePath(absoluteOrRelativePath, basePath, getCanonicalFileName) {
         return !isRootedDiskPath(absoluteOrRelativePath)
             ? absoluteOrRelativePath
-            : getRelativePathToDirectoryOrUrl(basePath, absoluteOrRelativePath, basePath, getCanonicalFileName, /*isAbsolutePathAnUrl*/ false);
+            : ts.getRelativePathToDirectoryOrUrl(basePath, absoluteOrRelativePath, basePath, getCanonicalFileName, /*isAbsolutePathAnUrl*/ false);
     }
     ts.convertToRelativePath = convertToRelativePath;
     function pathComponents(path, rootLength) {
@@ -14131,7 +14159,7 @@ var ts;
      */
     function getPathComponents(path, currentDirectory) {
         if (currentDirectory === void 0) { currentDirectory = ""; }
-        path = combinePaths(currentDirectory, path);
+        path = ts.combinePaths(currentDirectory, path);
         var rootLength = getRootLength(path);
         return pathComponents(path, rootLength);
     }
@@ -14186,15 +14214,18 @@ var ts;
     function getPathFromPathComponents(pathComponents) {
         if (pathComponents.length === 0)
             return "";
-        var root = pathComponents[0] && ensureTrailingDirectorySeparator(pathComponents[0]);
+        var root = pathComponents[0] && ts.ensureTrailingDirectorySeparator(pathComponents[0]);
         if (pathComponents.length === 1)
             return root;
         return root + pathComponents.slice(1).join(ts.directorySeparator);
     }
     ts.getPathFromPathComponents = getPathFromPathComponents;
+})(ts || (ts = {}));
+/* @internal */
+(function (ts) {
     function getPathComponentsRelativeTo(from, to, stringEqualityComparer, getCanonicalFileName) {
-        var fromComponents = reducePathComponents(getPathComponents(from));
-        var toComponents = reducePathComponents(getPathComponents(to));
+        var fromComponents = ts.reducePathComponents(ts.getPathComponents(from));
+        var toComponents = ts.reducePathComponents(ts.getPathComponents(to));
         var start;
         for (start = 0; start < fromComponents.length && start < toComponents.length; start++) {
             var fromComponent = getCanonicalFileName(fromComponents[start]);
@@ -14213,26 +14244,27 @@ var ts;
         }
         return [""].concat(relative, components);
     }
+    ts.getPathComponentsRelativeTo = getPathComponentsRelativeTo;
     function getRelativePathFromFile(from, to, getCanonicalFileName) {
-        return ensurePathIsNonModuleName(getRelativePathFromDirectory(getDirectoryPath(from), to, getCanonicalFileName));
+        return ensurePathIsNonModuleName(getRelativePathFromDirectory(ts.getDirectoryPath(from), to, getCanonicalFileName));
     }
     ts.getRelativePathFromFile = getRelativePathFromFile;
     function getRelativePathFromDirectory(fromDirectory, to, getCanonicalFileNameOrIgnoreCase) {
-        Debug.assert((getRootLength(fromDirectory) > 0) === (getRootLength(to) > 0), "Paths must either both be absolute or both be relative");
+        Debug.assert((ts.getRootLength(fromDirectory) > 0) === (ts.getRootLength(to) > 0), "Paths must either both be absolute or both be relative");
         var getCanonicalFileName = typeof getCanonicalFileNameOrIgnoreCase === "function" ? getCanonicalFileNameOrIgnoreCase : ts.identity;
         var ignoreCase = typeof getCanonicalFileNameOrIgnoreCase === "boolean" ? getCanonicalFileNameOrIgnoreCase : false;
         var pathComponents = getPathComponentsRelativeTo(fromDirectory, to, ignoreCase ? ts.equateStringsCaseInsensitive : ts.equateStringsCaseSensitive, getCanonicalFileName);
-        return getPathFromPathComponents(pathComponents);
+        return ts.getPathFromPathComponents(pathComponents);
     }
     ts.getRelativePathFromDirectory = getRelativePathFromDirectory;
     function getRelativePathToDirectoryOrUrl(directoryPathOrUrl, relativeOrAbsolutePath, currentDirectory, getCanonicalFileName, isAbsolutePathAnUrl) {
         var pathComponents = getPathComponentsRelativeTo(resolvePath(currentDirectory, directoryPathOrUrl), resolvePath(currentDirectory, relativeOrAbsolutePath), ts.equateStringsCaseSensitive, getCanonicalFileName);
         var firstComponent = pathComponents[0];
-        if (isAbsolutePathAnUrl && isRootedDiskPath(firstComponent)) {
+        if (isAbsolutePathAnUrl && ts.isRootedDiskPath(firstComponent)) {
             var prefix = firstComponent.charAt(0) === ts.directorySeparator ? "file://" : "file:///";
             pathComponents[0] = prefix + firstComponent;
         }
-        return getPathFromPathComponents(pathComponents);
+        return ts.getPathFromPathComponents(pathComponents);
     }
     ts.getRelativePathToDirectoryOrUrl = getRelativePathToDirectoryOrUrl;
     /**
@@ -14240,19 +14272,19 @@ var ts;
      * with `./` or `../`) so as not to be confused with an unprefixed module name.
      */
     function ensurePathIsNonModuleName(path) {
-        return getRootLength(path) === 0 && !pathIsRelative(path) ? "./" + path : path;
+        return ts.getRootLength(path) === 0 && !ts.pathIsRelative(path) ? "./" + path : path;
     }
     ts.ensurePathIsNonModuleName = ensurePathIsNonModuleName;
     function getBaseFileName(path, extensions, ignoreCase) {
-        path = normalizeSlashes(path);
+        path = ts.normalizeSlashes(path);
         // if the path provided is itself the root, then it has not file name.
-        var rootLength = getRootLength(path);
+        var rootLength = ts.getRootLength(path);
         if (rootLength === path.length)
             return "";
         // return the trailing portion of the path starting after the last (non-terminal) directory
         // separator but not including any trailing directory separator.
         path = removeTrailingDirectorySeparator(path);
-        var name = path.slice(Math.max(getRootLength(path), path.lastIndexOf(ts.directorySeparator) + 1));
+        var name = path.slice(Math.max(ts.getRootLength(path), path.lastIndexOf(ts.directorySeparator) + 1));
         var extension = extensions !== undefined && ignoreCase !== undefined ? getAnyExtensionFromPath(name, extensions, ignoreCase) : undefined;
         return extension ? name.slice(0, name.length - extension.length) : name;
     }
@@ -14266,13 +14298,13 @@ var ts;
             paths[_i - 1] = arguments[_i];
         }
         if (path)
-            path = normalizeSlashes(path);
+            path = ts.normalizeSlashes(path);
         for (var _a = 0, paths_1 = paths; _a < paths_1.length; _a++) {
             var relativePath = paths_1[_a];
             if (!relativePath)
                 continue;
-            relativePath = normalizeSlashes(relativePath);
-            if (!path || getRootLength(relativePath) !== 0) {
+            relativePath = ts.normalizeSlashes(relativePath);
+            if (!path || ts.getRootLength(relativePath) !== 0) {
                 path = relativePath;
             }
             else {
@@ -14291,8 +14323,8 @@ var ts;
         for (var _i = 1; _i < arguments.length; _i++) {
             paths[_i - 1] = arguments[_i];
         }
-        var combined = ts.some(paths) ? combinePaths.apply(void 0, [path].concat(paths)) : normalizeSlashes(path);
-        var normalized = getPathFromPathComponents(reducePathComponents(getPathComponents(combined)));
+        var combined = ts.some(paths) ? combinePaths.apply(void 0, [path].concat(paths)) : ts.normalizeSlashes(path);
+        var normalized = ts.getPathFromPathComponents(ts.reducePathComponents(ts.getPathComponents(combined)));
         return normalized && hasTrailingDirectorySeparator(combined) ? ensureTrailingDirectorySeparator(normalized) : normalized;
     }
     ts.resolvePath = resolvePath;
@@ -14327,8 +14359,8 @@ var ts;
             return -1 /* LessThan */;
         if (b === undefined)
             return 1 /* GreaterThan */;
-        var aComponents = reducePathComponents(getPathComponents(a));
-        var bComponents = reducePathComponents(getPathComponents(b));
+        var aComponents = ts.reducePathComponents(ts.getPathComponents(a));
+        var bComponents = ts.reducePathComponents(ts.getPathComponents(b));
         var sharedLength = Math.min(aComponents.length, bComponents.length);
         for (var i = 0; i < sharedLength; i++) {
             var stringComparer = i === 0 ? ts.compareStringsCaseInsensitive : componentComparer;
@@ -14376,8 +14408,8 @@ var ts;
             return false;
         if (parent === child)
             return true;
-        var parentComponents = reducePathComponents(getPathComponents(parent));
-        var childComponents = reducePathComponents(getPathComponents(child));
+        var parentComponents = ts.reducePathComponents(ts.getPathComponents(parent));
+        var childComponents = ts.reducePathComponents(ts.getPathComponents(child));
         if (childComponents.length < parentComponents.length) {
             return false;
         }
@@ -14480,7 +14512,7 @@ var ts;
         var singleAsteriskRegexFragment = _a.singleAsteriskRegexFragment, doubleAsteriskRegexFragment = _a.doubleAsteriskRegexFragment, replaceWildcardCharacter = _a.replaceWildcardCharacter;
         var subpattern = "";
         var hasWrittenComponent = false;
-        var components = getNormalizedPathComponents(spec, basePath);
+        var components = ts.getNormalizedPathComponents(spec, basePath);
         var lastComponent = ts.last(components);
         if (usage !== "exclude" && lastComponent === "**") {
             return undefined;
@@ -14547,8 +14579,8 @@ var ts;
     }
     /** @param path directory of the tsconfig.json */
     function getFileMatcherPatterns(path, excludes, includes, useCaseSensitiveFileNames, currentDirectory) {
-        path = normalizePath(path);
-        currentDirectory = normalizePath(currentDirectory);
+        path = ts.normalizePath(path);
+        currentDirectory = ts.normalizePath(currentDirectory);
         var absolutePath = combinePaths(currentDirectory, path);
         return {
             includeFilePatterns: ts.map(getRegularExpressionsForWildcards(includes, absolutePath, "files"), function (pattern) { return "^" + pattern + "$"; }),
@@ -14565,8 +14597,8 @@ var ts;
     ts.getRegexFromPattern = getRegexFromPattern;
     /** @param path directory of the tsconfig.json */
     function matchFiles(path, extensions, excludes, includes, useCaseSensitiveFileNames, currentDirectory, depth, getFileSystemEntries) {
-        path = normalizePath(path);
-        currentDirectory = normalizePath(currentDirectory);
+        path = ts.normalizePath(path);
+        currentDirectory = ts.normalizePath(currentDirectory);
         var patterns = getFileMatcherPatterns(path, excludes, includes, useCaseSensitiveFileNames, currentDirectory);
         var includeFileRegexes = patterns.includeFilePatterns && patterns.includeFilePatterns.map(function (pattern) { return getRegexFromPattern(pattern, useCaseSensitiveFileNames); });
         var includeDirectoryRegex = patterns.includeDirectoryPattern && getRegexFromPattern(patterns.includeDirectoryPattern, useCaseSensitiveFileNames);
@@ -14633,7 +14665,7 @@ var ts;
                 var include = includes_1[_i];
                 // We also need to check the relative paths by converting them to absolute and normalizing
                 // in case they escape the base path (e.g "..\somedirectory")
-                var absolute = isRootedDiskPath(include) ? include : normalizePath(combinePaths(path, include));
+                var absolute = ts.isRootedDiskPath(include) ? include : ts.normalizePath(combinePaths(path, include));
                 // Append the literal and canonical candidate base paths.
                 includeBasePaths.push(getIncludeBasePath(absolute));
             }
@@ -14659,7 +14691,7 @@ var ts;
             // No "*" or "?" in the path
             return !hasExtension(absolute)
                 ? absolute
-                : removeTrailingDirectorySeparator(getDirectoryPath(absolute));
+                : removeTrailingDirectorySeparator(ts.getDirectoryPath(absolute));
         }
         return absolute.substring(0, absolute.lastIndexOf(ts.directorySeparator, wildcardOffset));
     }
@@ -14836,7 +14868,7 @@ var ts;
     })(Debug = ts.Debug || (ts.Debug = {}));
     function tryParsePattern(pattern) {
         // This should be verified outside of here and a proper error thrown.
-        Debug.assert(hasZeroOrOneAsteriskCharacter(pattern));
+        Debug.assert(ts.hasZeroOrOneAsteriskCharacter(pattern));
         var indexOfStar = pattern.indexOf("*");
         return indexOfStar === -1 ? undefined : {
             prefix: pattern.substr(0, indexOfStar),
@@ -14879,8 +14911,8 @@ var ts;
     function getAnyExtensionFromPathWorker(path, extensions, stringEqualityComparer) {
         if (typeof extensions === "string")
             extensions = [extensions];
-        for (var _i = 0, extensions_1 = extensions; _i < extensions_1.length; _i++) {
-            var extension = extensions_1[_i];
+        for (var _i = 0, extensions_2 = extensions; _i < extensions_2.length; _i++) {
+            var extension = extensions_2[_i];
             if (!ts.startsWith(extension, "."))
                 extension = "." + extension;
             if (path.length >= extension.length && path.charAt(path.length - extension.length) === ".") {
@@ -21353,8 +21385,8 @@ var ts;
                 array._children = undefined;
                 array.pos += delta;
                 array.end += delta;
-                for (var _i = 0, array_1 = array; _i < array_1.length; _i++) {
-                    var node = array_1[_i];
+                for (var _i = 0, array_8 = array; _i < array_8.length; _i++) {
+                    var node = array_8[_i];
                     visitNode(node);
                 }
             }
@@ -21504,8 +21536,8 @@ var ts;
                     array._children = undefined;
                     // Adjust the pos or end (or both) of the intersecting array accordingly.
                     adjustIntersectingElement(array, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta);
-                    for (var _i = 0, array_2 = array; _i < array_2.length; _i++) {
-                        var node = array_2[_i];
+                    for (var _i = 0, array_9 = array; _i < array_9.length; _i++) {
+                        var node = array_9[_i];
                         visitNode(node);
                     }
                     return;
@@ -25341,8 +25373,60901 @@ var ts;
         return value !== undefined ? { value: value } : undefined;
     }
 })(ts || (ts = {}));
-//# sourceMappingURL=parser.js.map
+/* @internal */
+var ts;
+(function (ts) {
+    var ModuleInstanceState;
+    (function (ModuleInstanceState) {
+        ModuleInstanceState[ModuleInstanceState["NonInstantiated"] = 0] = "NonInstantiated";
+        ModuleInstanceState[ModuleInstanceState["Instantiated"] = 1] = "Instantiated";
+        ModuleInstanceState[ModuleInstanceState["ConstEnumOnly"] = 2] = "ConstEnumOnly";
+    })(ModuleInstanceState = ts.ModuleInstanceState || (ts.ModuleInstanceState = {}));
+    function getModuleInstanceState(node) {
+        return node.body ? getModuleInstanceStateWorker(node.body) : 1 /* Instantiated */;
+    }
+    ts.getModuleInstanceState = getModuleInstanceState;
+    function getModuleInstanceStateWorker(node) {
+        // A module is uninstantiated if it contains only
+        switch (node.kind) {
+            // 1. interface declarations, type alias declarations
+            case 236 /* InterfaceDeclaration */:
+            case 237 /* TypeAliasDeclaration */:
+                return 0 /* NonInstantiated */;
+            // 2. const enum declarations
+            case 238 /* EnumDeclaration */:
+                if (ts.isConst(node)) {
+                    return 2 /* ConstEnumOnly */;
+                }
+                break;
+            // 3. non-exported import declarations
+            case 244 /* ImportDeclaration */:
+            case 243 /* ImportEqualsDeclaration */:
+                if (!(ts.hasModifier(node, 1 /* Export */))) {
+                    return 0 /* NonInstantiated */;
+                }
+                break;
+            // 4. other uninstantiated module declarations.
+            case 240 /* ModuleBlock */: {
+                var state_1 = 0 /* NonInstantiated */;
+                ts.forEachChild(node, function (n) {
+                    var childState = getModuleInstanceStateWorker(n);
+                    switch (childState) {
+                        case 0 /* NonInstantiated */:
+                            // child is non-instantiated - continue searching
+                            return;
+                        case 2 /* ConstEnumOnly */:
+                            // child is const enum only - record state and continue searching
+                            state_1 = 2 /* ConstEnumOnly */;
+                            return;
+                        case 1 /* Instantiated */:
+                            // child is instantiated - record state and stop
+                            state_1 = 1 /* Instantiated */;
+                            return true;
+                        default:
+                            ts.Debug.assertNever(childState);
+                    }
+                });
+                return state_1;
+            }
+            case 239 /* ModuleDeclaration */:
+                return getModuleInstanceState(node);
+            case 71 /* Identifier */:
+                // Only jsdoc typedef definition can exist in jsdoc namespace, and it should
+                // be considered the same as type alias
+                if (node.isInJSDocNamespace) {
+                    return 0 /* NonInstantiated */;
+                }
+        }
+        return 1 /* Instantiated */;
+    }
+    var ContainerFlags;
+    (function (ContainerFlags) {
+        // The current node is not a container, and no container manipulation should happen before
+        // recursing into it.
+        ContainerFlags[ContainerFlags["None"] = 0] = "None";
+        // The current node is a container.  It should be set as the current container (and block-
+        // container) before recursing into it.  The current node does not have locals.  Examples:
+        //
+        //      Classes, ObjectLiterals, TypeLiterals, Interfaces...
+        ContainerFlags[ContainerFlags["IsContainer"] = 1] = "IsContainer";
+        // The current node is a block-scoped-container.  It should be set as the current block-
+        // container before recursing into it.  Examples:
+        //
+        //      Blocks (when not parented by functions), Catch clauses, For/For-in/For-of statements...
+        ContainerFlags[ContainerFlags["IsBlockScopedContainer"] = 2] = "IsBlockScopedContainer";
+        // The current node is the container of a control flow path. The current control flow should
+        // be saved and restored, and a new control flow initialized within the container.
+        ContainerFlags[ContainerFlags["IsControlFlowContainer"] = 4] = "IsControlFlowContainer";
+        ContainerFlags[ContainerFlags["IsFunctionLike"] = 8] = "IsFunctionLike";
+        ContainerFlags[ContainerFlags["IsFunctionExpression"] = 16] = "IsFunctionExpression";
+        ContainerFlags[ContainerFlags["HasLocals"] = 32] = "HasLocals";
+        ContainerFlags[ContainerFlags["IsInterface"] = 64] = "IsInterface";
+        ContainerFlags[ContainerFlags["IsObjectLiteralOrClassExpressionMethod"] = 128] = "IsObjectLiteralOrClassExpressionMethod";
+    })(ContainerFlags || (ContainerFlags = {}));
+    var binder = createBinder();
+    function bindSourceFile(file, options) {
+        ts.performance.mark("beforeBind");
+        binder(file, options);
+        ts.performance.mark("afterBind");
+        ts.performance.measure("Bind", "beforeBind", "afterBind");
+    }
+    ts.bindSourceFile = bindSourceFile;
+    function createBinder() {
+        var file;
+        var options;
+        var languageVersion;
+        var parent;
+        var container;
+        var thisParentContainer; // Container one level up
+        var blockScopeContainer;
+        var lastContainer;
+        var delayedTypeAliases;
+        var seenThisKeyword;
+        // state used by control flow analysis
+        var currentFlow;
+        var currentBreakTarget;
+        var currentContinueTarget;
+        var currentReturnTarget;
+        var currentTrueTarget;
+        var currentFalseTarget;
+        var preSwitchCaseFlow;
+        var activeLabels;
+        var hasExplicitReturn;
+        // state used for emit helpers
+        var emitFlags;
+        // If this file is an external module, then it is automatically in strict-mode according to
+        // ES6.  If it is not an external module, then we'll determine if it is in strict mode or
+        // not depending on if we see "use strict" in certain places or if we hit a class/namespace
+        // or if compiler options contain alwaysStrict.
+        var inStrictMode;
+        var symbolCount = 0;
+        var Symbol; // tslint:disable-line variable-name
+        var classifiableNames;
+        var unreachableFlow = { flags: 1 /* Unreachable */ };
+        var reportedUnreachableFlow = { flags: 1 /* Unreachable */ };
+        // state used to aggregate transform flags during bind.
+        var subtreeTransformFlags = 0 /* None */;
+        var skipTransformFlagAggregation;
+        /**
+         * Inside the binder, we may create a diagnostic for an as-yet unbound node (with potentially no parent pointers, implying no accessible source file)
+         * If so, the node _must_ be in the current file (as that's the only way anything could have traversed to it to yield it as the error node)
+         * This version of `createDiagnosticForNode` uses the binder's context to account for this, and always yields correct diagnostics even in these situations.
+         */
+        function createDiagnosticForNode(node, message, arg0, arg1, arg2) {
+            return ts.createDiagnosticForNodeInSourceFile(ts.getSourceFileOfNode(node) || file, node, message, arg0, arg1, arg2);
+        }
+        function bindSourceFile(f, opts) {
+            file = f;
+            options = opts;
+            languageVersion = ts.getEmitScriptTarget(options);
+            inStrictMode = bindInStrictMode(file, opts);
+            classifiableNames = ts.createUnderscoreEscapedMap();
+            symbolCount = 0;
+            skipTransformFlagAggregation = file.isDeclarationFile;
+            Symbol = ts.objectAllocator.getSymbolConstructor();
+            if (!file.locals) {
+                bind(file);
+                file.symbolCount = symbolCount;
+                file.classifiableNames = classifiableNames;
+                delayedBindJSDocTypedefTag();
+            }
+            file = undefined;
+            options = undefined;
+            languageVersion = undefined;
+            parent = undefined;
+            container = undefined;
+            thisParentContainer = undefined;
+            blockScopeContainer = undefined;
+            lastContainer = undefined;
+            delayedTypeAliases = undefined;
+            seenThisKeyword = false;
+            currentFlow = undefined;
+            currentBreakTarget = undefined;
+            currentContinueTarget = undefined;
+            currentReturnTarget = undefined;
+            currentTrueTarget = undefined;
+            currentFalseTarget = undefined;
+            activeLabels = undefined;
+            hasExplicitReturn = false;
+            emitFlags = 0 /* None */;
+            subtreeTransformFlags = 0 /* None */;
+        }
+        return bindSourceFile;
+        function bindInStrictMode(file, opts) {
+            if (ts.getStrictOptionValue(opts, "alwaysStrict") && !file.isDeclarationFile) {
+                // bind in strict mode source files with alwaysStrict option
+                return true;
+            }
+            else {
+                return !!file.externalModuleIndicator;
+            }
+        }
+        function createSymbol(flags, name) {
+            symbolCount++;
+            return new Symbol(flags, name);
+        }
+        function addDeclarationToSymbol(symbol, node, symbolFlags) {
+            symbol.flags |= symbolFlags;
+            node.symbol = symbol;
+            symbol.declarations = ts.append(symbol.declarations, node);
+            if (symbolFlags & 1955 /* HasExports */ && !symbol.exports) {
+                symbol.exports = ts.createSymbolTable();
+            }
+            if (symbolFlags & 6240 /* HasMembers */ && !symbol.members) {
+                symbol.members = ts.createSymbolTable();
+            }
+            if (symbolFlags & 67216319 /* Value */) {
+                var valueDeclaration = symbol.valueDeclaration;
+                if (!valueDeclaration ||
+                    (valueDeclaration.kind !== node.kind && ts.isEffectiveModuleDeclaration(valueDeclaration))) {
+                    // other kinds of value declarations take precedence over modules
+                    symbol.valueDeclaration = node;
+                }
+            }
+        }
+        // Should not be called on a declaration with a computed property name,
+        // unless it is a well known Symbol.
+        function getDeclarationName(node) {
+            if (node.kind === 249 /* ExportAssignment */) {
+                return node.isExportEquals ? "export=" /* ExportEquals */ : "default" /* Default */;
+            }
+            var name = ts.getNameOfDeclaration(node);
+            if (name) {
+                if (ts.isAmbientModule(node)) {
+                    var moduleName = ts.getTextOfIdentifierOrLiteral(name);
+                    return (ts.isGlobalScopeAugmentation(node) ? "__global" : "\"" + moduleName + "\"");
+                }
+                if (name.kind === 147 /* ComputedPropertyName */) {
+                    var nameExpression = name.expression;
+                    // treat computed property names where expression is string/numeric literal as just string/numeric literal
+                    if (ts.isStringOrNumericLiteral(nameExpression)) {
+                        return ts.escapeLeadingUnderscores(nameExpression.text);
+                    }
+                    ts.Debug.assert(ts.isWellKnownSymbolSyntactically(nameExpression));
+                    return ts.getPropertyNameForKnownSymbolName(ts.idText(nameExpression.name));
+                }
+                return ts.isPropertyNameLiteral(name) ? ts.getEscapedTextOfIdentifierOrLiteral(name) : undefined;
+            }
+            switch (node.kind) {
+                case 155 /* Constructor */:
+                    return "__constructor" /* Constructor */;
+                case 163 /* FunctionType */:
+                case 158 /* CallSignature */:
+                case 288 /* JSDocSignature */:
+                    return "__call" /* Call */;
+                case 164 /* ConstructorType */:
+                case 159 /* ConstructSignature */:
+                    return "__new" /* New */;
+                case 160 /* IndexSignature */:
+                    return "__index" /* Index */;
+                case 250 /* ExportDeclaration */:
+                    return "__export" /* ExportStar */;
+                case 274 /* SourceFile */:
+                    // json file should behave as
+                    // module.exports = ...
+                    return "export=" /* ExportEquals */;
+                case 200 /* BinaryExpression */:
+                    if (ts.getSpecialPropertyAssignmentKind(node) === 2 /* ModuleExports */) {
+                        // module.exports = ...
+                        return "export=" /* ExportEquals */;
+                    }
+                    ts.Debug.fail("Unknown binary declaration kind");
+                    break;
+                case 284 /* JSDocFunctionType */:
+                    return (ts.isJSDocConstructSignature(node) ? "__new" /* New */ : "__call" /* Call */);
+                case 149 /* Parameter */:
+                    // Parameters with names are handled at the top of this function.  Parameters
+                    // without names can only come from JSDocFunctionTypes.
+                    ts.Debug.assert(node.parent.kind === 284 /* JSDocFunctionType */, "Impossible parameter parent kind", function () { return "parent is: " + (ts.SyntaxKind ? ts.SyntaxKind[node.parent.kind] : node.parent.kind) + ", expected JSDocFunctionType"; });
+                    var functionType = node.parent;
+                    var index = functionType.parameters.indexOf(node);
+                    return "arg" + index;
+            }
+        }
+        function getDisplayName(node) {
+            return ts.isNamedDeclaration(node) ? ts.declarationNameToString(node.name) : ts.unescapeLeadingUnderscores(getDeclarationName(node)); // TODO: GH#18217
+        }
+        /**
+         * Declares a Symbol for the node and adds it to symbols. Reports errors for conflicting identifier names.
+         * @param symbolTable - The symbol table which node will be added to.
+         * @param parent - node's parent declaration.
+         * @param node - The declaration to be added to the symbol table
+         * @param includes - The SymbolFlags that node has in addition to its declaration type (eg: export, ambient, etc.)
+         * @param excludes - The flags which node cannot be declared alongside in a symbol table. Used to report forbidden declarations.
+         */
+        function declareSymbol(symbolTable, parent, node, includes, excludes, isReplaceableByMethod) {
+            ts.Debug.assert(!ts.hasDynamicName(node));
+            var isDefaultExport = ts.hasModifier(node, 512 /* Default */);
+            // The exported symbol for an export default function/class node is always named "default"
+            var name = isDefaultExport && parent ? "default" /* Default */ : getDeclarationName(node);
+            var symbol;
+            if (name === undefined) {
+                symbol = createSymbol(0 /* None */, "__missing" /* Missing */);
+            }
+            else {
+                // Check and see if the symbol table already has a symbol with this name.  If not,
+                // create a new symbol with this name and add it to the table.  Note that we don't
+                // give the new symbol any flags *yet*.  This ensures that it will not conflict
+                // with the 'excludes' flags we pass in.
+                //
+                // If we do get an existing symbol, see if it conflicts with the new symbol we're
+                // creating.  For example, a 'var' symbol and a 'class' symbol will conflict within
+                // the same symbol table.  If we have a conflict, report the issue on each
+                // declaration we have for this symbol, and then create a new symbol for this
+                // declaration.
+                //
+                // Note that when properties declared in Javascript constructors
+                // (marked by isReplaceableByMethod) conflict with another symbol, the property loses.
+                // Always. This allows the common Javascript pattern of overwriting a prototype method
+                // with an bound instance method of the same type: `this.method = this.method.bind(this)`
+                //
+                // If we created a new symbol, either because we didn't have a symbol with this name
+                // in the symbol table, or we conflicted with an existing symbol, then just add this
+                // node as the sole declaration of the new symbol.
+                //
+                // Otherwise, we'll be merging into a compatible existing symbol (for example when
+                // you have multiple 'vars' with the same name in the same container).  In this case
+                // just add this node into the declarations list of the symbol.
+                symbol = symbolTable.get(name);
+                if (includes & 2885600 /* Classifiable */) {
+                    classifiableNames.set(name, true);
+                }
+                if (!symbol) {
+                    symbolTable.set(name, symbol = createSymbol(0 /* None */, name));
+                    if (isReplaceableByMethod)
+                        symbol.isReplaceableByMethod = true;
+                }
+                else if (isReplaceableByMethod && !symbol.isReplaceableByMethod) {
+                    // A symbol already exists, so don't add this as a declaration.
+                    return symbol;
+                }
+                else if (symbol.flags & excludes) {
+                    if (symbol.isReplaceableByMethod) {
+                        // Javascript constructor-declared symbols can be discarded in favor of
+                        // prototype symbols like methods.
+                        symbolTable.set(name, symbol = createSymbol(0 /* None */, name));
+                    }
+                    else {
+                        if (ts.isNamedDeclaration(node)) {
+                            node.name.parent = node;
+                        }
+                        // Report errors every position with duplicate declaration
+                        // Report errors on previous encountered declarations
+                        var message_1 = symbol.flags & 2 /* BlockScopedVariable */
+                            ? ts.Diagnostics.Cannot_redeclare_block_scoped_variable_0
+                            : ts.Diagnostics.Duplicate_identifier_0;
+                        if (symbol.flags & 384 /* Enum */ || includes & 384 /* Enum */) {
+                            message_1 = ts.Diagnostics.Enum_declarations_can_only_merge_with_namespace_or_other_enum_declarations;
+                        }
+                        if (symbol.declarations && symbol.declarations.length) {
+                            // If the current node is a default export of some sort, then check if
+                            // there are any other default exports that we need to error on.
+                            // We'll know whether we have other default exports depending on if `symbol` already has a declaration list set.
+                            if (isDefaultExport) {
+                                message_1 = ts.Diagnostics.A_module_cannot_have_multiple_default_exports;
+                            }
+                            else {
+                                // This is to properly report an error in the case "export default { }" is after export default of class declaration or function declaration.
+                                // Error on multiple export default in the following case:
+                                // 1. multiple export default of class declaration or function declaration by checking NodeFlags.Default
+                                // 2. multiple export default of export assignment. This one doesn't have NodeFlags.Default on (as export default doesn't considered as modifiers)
+                                if (symbol.declarations && symbol.declarations.length &&
+                                    (node.kind === 249 /* ExportAssignment */ && !node.isExportEquals)) {
+                                    message_1 = ts.Diagnostics.A_module_cannot_have_multiple_default_exports;
+                                }
+                            }
+                        }
+                        ts.forEach(symbol.declarations, function (declaration) {
+                            file.bindDiagnostics.push(createDiagnosticForNode(ts.getNameOfDeclaration(declaration) || declaration, message_1, getDisplayName(declaration)));
+                        });
+                        file.bindDiagnostics.push(createDiagnosticForNode(ts.getNameOfDeclaration(node) || node, message_1, getDisplayName(node)));
+                        symbol = createSymbol(0 /* None */, name);
+                    }
+                }
+            }
+            addDeclarationToSymbol(symbol, node, includes);
+            if (symbol.parent) {
+                ts.Debug.assert(symbol.parent === parent, "Existing symbol parent should match new one");
+            }
+            else {
+                symbol.parent = parent;
+            }
+            return symbol;
+        }
+        function declareModuleMember(node, symbolFlags, symbolExcludes) {
+            var hasExportModifier = ts.getCombinedModifierFlags(node) & 1 /* Export */;
+            if (symbolFlags & 2097152 /* Alias */) {
+                if (node.kind === 252 /* ExportSpecifier */ || (node.kind === 243 /* ImportEqualsDeclaration */ && hasExportModifier)) {
+                    return declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
+                }
+                else {
+                    return declareSymbol(container.locals, /*parent*/ undefined, node, symbolFlags, symbolExcludes);
+                }
+            }
+            else {
+                // Exported module members are given 2 symbols: A local symbol that is classified with an ExportValue flag,
+                // and an associated export symbol with all the correct flags set on it. There are 2 main reasons:
+                //
+                //   1. We treat locals and exports of the same name as mutually exclusive within a container.
+                //      That means the binder will issue a Duplicate Identifier error if you mix locals and exports
+                //      with the same name in the same container.
+                //      TODO: Make this a more specific error and decouple it from the exclusion logic.
+                //   2. When we checkIdentifier in the checker, we set its resolved symbol to the local symbol,
+                //      but return the export symbol (by calling getExportSymbolOfValueSymbolIfExported). That way
+                //      when the emitter comes back to it, it knows not to qualify the name if it was found in a containing scope.
+                // NOTE: Nested ambient modules always should go to to 'locals' table to prevent their automatic merge
+                //       during global merging in the checker. Why? The only case when ambient module is permitted inside another module is module augmentation
+                //       and this case is specially handled. Module augmentations should only be merged with original module definition
+                //       and should never be merged directly with other augmentation, and the latter case would be possible if automatic merge is allowed.
+                if (ts.isJSDocTypeAlias(node))
+                    ts.Debug.assert(ts.isInJavaScriptFile(node)); // We shouldn't add symbols for JSDoc nodes if not in a JS file.
+                if ((!ts.isAmbientModule(node) && (hasExportModifier || container.flags & 32 /* ExportContext */)) || ts.isJSDocTypeAlias(node)) {
+                    if (ts.hasModifier(node, 512 /* Default */) && !getDeclarationName(node)) {
+                        return declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes); // No local symbol for an unnamed default!
+                    }
+                    var exportKind = symbolFlags & 67216319 /* Value */ ? 1048576 /* ExportValue */ : 0;
+                    var local = declareSymbol(container.locals, /*parent*/ undefined, node, exportKind, symbolExcludes);
+                    local.exportSymbol = declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
+                    node.localSymbol = local;
+                    return local;
+                }
+                else {
+                    return declareSymbol(container.locals, /*parent*/ undefined, node, symbolFlags, symbolExcludes);
+                }
+            }
+        }
+        // All container nodes are kept on a linked list in declaration order. This list is used by
+        // the getLocalNameOfContainer function in the type checker to validate that the local name
+        // used for a container is unique.
+        function bindContainer(node, containerFlags) {
+            // Before we recurse into a node's children, we first save the existing parent, container
+            // and block-container.  Then after we pop out of processing the children, we restore
+            // these saved values.
+            var saveContainer = container;
+            var saveThisParentContainer = thisParentContainer;
+            var savedBlockScopeContainer = blockScopeContainer;
+            // Depending on what kind of node this is, we may have to adjust the current container
+            // and block-container.   If the current node is a container, then it is automatically
+            // considered the current block-container as well.  Also, for containers that we know
+            // may contain locals, we eagerly initialize the .locals field. We do this because
+            // it's highly likely that the .locals will be needed to place some child in (for example,
+            // a parameter, or variable declaration).
+            //
+            // However, we do not proactively create the .locals for block-containers because it's
+            // totally normal and common for block-containers to never actually have a block-scoped
+            // variable in them.  We don't want to end up allocating an object for every 'block' we
+            // run into when most of them won't be necessary.
+            //
+            // Finally, if this is a block-container, then we clear out any existing .locals object
+            // it may contain within it.  This happens in incremental scenarios.  Because we can be
+            // reusing a node from a previous compilation, that node may have had 'locals' created
+            // for it.  We must clear this so we don't accidentally move any stale data forward from
+            // a previous compilation.
+            if (containerFlags & 1 /* IsContainer */) {
+                if (node.kind !== 193 /* ArrowFunction */) {
+                    thisParentContainer = container;
+                }
+                container = blockScopeContainer = node;
+                if (containerFlags & 32 /* HasLocals */) {
+                    container.locals = ts.createSymbolTable();
+                }
+                addToContainerChain(container);
+            }
+            else if (containerFlags & 2 /* IsBlockScopedContainer */) {
+                blockScopeContainer = node;
+                blockScopeContainer.locals = undefined;
+            }
+            if (containerFlags & 4 /* IsControlFlowContainer */) {
+                var saveCurrentFlow = currentFlow;
+                var saveBreakTarget = currentBreakTarget;
+                var saveContinueTarget = currentContinueTarget;
+                var saveReturnTarget = currentReturnTarget;
+                var saveActiveLabels = activeLabels;
+                var saveHasExplicitReturn = hasExplicitReturn;
+                var isIIFE = containerFlags & 16 /* IsFunctionExpression */ && !ts.hasModifier(node, 256 /* Async */) &&
+                    !node.asteriskToken && !!ts.getImmediatelyInvokedFunctionExpression(node);
+                // A non-async, non-generator IIFE is considered part of the containing control flow. Return statements behave
+                // similarly to break statements that exit to a label just past the statement body.
+                if (!isIIFE) {
+                    currentFlow = { flags: 2 /* Start */ };
+                    if (containerFlags & (16 /* IsFunctionExpression */ | 128 /* IsObjectLiteralOrClassExpressionMethod */)) {
+                        currentFlow.container = node;
+                    }
+                }
+                // We create a return control flow graph for IIFEs and constructors. For constructors
+                // we use the return control flow graph in strict property intialization checks.
+                currentReturnTarget = isIIFE || node.kind === 155 /* Constructor */ ? createBranchLabel() : undefined;
+                currentBreakTarget = undefined;
+                currentContinueTarget = undefined;
+                activeLabels = undefined;
+                hasExplicitReturn = false;
+                bindChildren(node);
+                // Reset all reachability check related flags on node (for incremental scenarios)
+                node.flags &= ~1408 /* ReachabilityAndEmitFlags */;
+                if (!(currentFlow.flags & 1 /* Unreachable */) && containerFlags & 8 /* IsFunctionLike */ && ts.nodeIsPresent(node.body)) {
+                    node.flags |= 128 /* HasImplicitReturn */;
+                    if (hasExplicitReturn)
+                        node.flags |= 256 /* HasExplicitReturn */;
+                }
+                if (node.kind === 274 /* SourceFile */) {
+                    node.flags |= emitFlags;
+                }
+                if (currentReturnTarget) {
+                    addAntecedent(currentReturnTarget, currentFlow);
+                    currentFlow = finishFlowLabel(currentReturnTarget);
+                    if (node.kind === 155 /* Constructor */) {
+                        node.returnFlowNode = currentFlow;
+                    }
+                }
+                if (!isIIFE) {
+                    currentFlow = saveCurrentFlow;
+                }
+                currentBreakTarget = saveBreakTarget;
+                currentContinueTarget = saveContinueTarget;
+                currentReturnTarget = saveReturnTarget;
+                activeLabels = saveActiveLabels;
+                hasExplicitReturn = saveHasExplicitReturn;
+            }
+            else if (containerFlags & 64 /* IsInterface */) {
+                seenThisKeyword = false;
+                bindChildren(node);
+                node.flags = seenThisKeyword ? node.flags | 64 /* ContainsThis */ : node.flags & ~64 /* ContainsThis */;
+            }
+            else {
+                bindChildren(node);
+            }
+            container = saveContainer;
+            thisParentContainer = saveThisParentContainer;
+            blockScopeContainer = savedBlockScopeContainer;
+        }
+        function bindChildren(node) {
+            if (skipTransformFlagAggregation) {
+                bindChildrenWorker(node);
+            }
+            else if (node.transformFlags & 536870912 /* HasComputedFlags */) {
+                skipTransformFlagAggregation = true;
+                bindChildrenWorker(node);
+                skipTransformFlagAggregation = false;
+                subtreeTransformFlags |= node.transformFlags & ~getTransformFlagsSubtreeExclusions(node.kind);
+            }
+            else {
+                var savedSubtreeTransformFlags = subtreeTransformFlags;
+                subtreeTransformFlags = 0;
+                bindChildrenWorker(node);
+                subtreeTransformFlags = savedSubtreeTransformFlags | computeTransformFlagsForNode(node, subtreeTransformFlags);
+            }
+        }
+        function bindEachFunctionsFirst(nodes) {
+            bindEach(nodes, function (n) { return n.kind === 234 /* FunctionDeclaration */ ? bind(n) : undefined; });
+            bindEach(nodes, function (n) { return n.kind !== 234 /* FunctionDeclaration */ ? bind(n) : undefined; });
+        }
+        function bindEach(nodes, bindFunction) {
+            if (bindFunction === void 0) { bindFunction = bind; }
+            if (nodes === undefined) {
+                return;
+            }
+            if (skipTransformFlagAggregation) {
+                ts.forEach(nodes, bindFunction);
+            }
+            else {
+                var savedSubtreeTransformFlags = subtreeTransformFlags;
+                subtreeTransformFlags = 0 /* None */;
+                var nodeArrayFlags = 0 /* None */;
+                for (var _i = 0, nodes_2 = nodes; _i < nodes_2.length; _i++) {
+                    var node = nodes_2[_i];
+                    bindFunction(node);
+                    nodeArrayFlags |= node.transformFlags & ~536870912 /* HasComputedFlags */;
+                }
+                nodes.transformFlags = nodeArrayFlags | 536870912 /* HasComputedFlags */;
+                subtreeTransformFlags |= savedSubtreeTransformFlags;
+            }
+        }
+        function bindEachChild(node) {
+            ts.forEachChild(node, bind, bindEach);
+        }
+        function bindChildrenWorker(node) {
+            if (checkUnreachable(node)) {
+                bindEachChild(node);
+                return;
+            }
+            switch (node.kind) {
+                case 219 /* WhileStatement */:
+                    bindWhileStatement(node);
+                    break;
+                case 218 /* DoStatement */:
+                    bindDoStatement(node);
+                    break;
+                case 220 /* ForStatement */:
+                    bindForStatement(node);
+                    break;
+                case 221 /* ForInStatement */:
+                case 222 /* ForOfStatement */:
+                    bindForInOrForOfStatement(node);
+                    break;
+                case 217 /* IfStatement */:
+                    bindIfStatement(node);
+                    break;
+                case 225 /* ReturnStatement */:
+                case 229 /* ThrowStatement */:
+                    bindReturnOrThrow(node);
+                    break;
+                case 224 /* BreakStatement */:
+                case 223 /* ContinueStatement */:
+                    bindBreakOrContinueStatement(node);
+                    break;
+                case 230 /* TryStatement */:
+                    bindTryStatement(node);
+                    break;
+                case 227 /* SwitchStatement */:
+                    bindSwitchStatement(node);
+                    break;
+                case 241 /* CaseBlock */:
+                    bindCaseBlock(node);
+                    break;
+                case 266 /* CaseClause */:
+                    bindCaseClause(node);
+                    break;
+                case 228 /* LabeledStatement */:
+                    bindLabeledStatement(node);
+                    break;
+                case 198 /* PrefixUnaryExpression */:
+                    bindPrefixUnaryExpressionFlow(node);
+                    break;
+                case 199 /* PostfixUnaryExpression */:
+                    bindPostfixUnaryExpressionFlow(node);
+                    break;
+                case 200 /* BinaryExpression */:
+                    bindBinaryExpressionFlow(node);
+                    break;
+                case 194 /* DeleteExpression */:
+                    bindDeleteExpressionFlow(node);
+                    break;
+                case 201 /* ConditionalExpression */:
+                    bindConditionalExpressionFlow(node);
+                    break;
+                case 232 /* VariableDeclaration */:
+                    bindVariableDeclarationFlow(node);
+                    break;
+                case 187 /* CallExpression */:
+                    bindCallExpressionFlow(node);
+                    break;
+                case 297 /* JSDocTypedefTag */:
+                case 292 /* JSDocCallbackTag */:
+                    bindJSDocTypeAlias(node);
+                    break;
+                // In source files and blocks, bind functions first to match hoisting that occurs at runtime
+                case 274 /* SourceFile */:
+                    bindEachFunctionsFirst(node.statements);
+                    bind(node.endOfFileToken);
+                    break;
+                case 213 /* Block */:
+                case 240 /* ModuleBlock */:
+                    bindEachFunctionsFirst(node.statements);
+                    break;
+                default:
+                    bindEachChild(node);
+                    break;
+            }
+            bindJSDoc(node);
+        }
+        function isNarrowingExpression(expr) {
+            switch (expr.kind) {
+                case 71 /* Identifier */:
+                case 99 /* ThisKeyword */:
+                case 185 /* PropertyAccessExpression */:
+                    return isNarrowableReference(expr);
+                case 187 /* CallExpression */:
+                    return hasNarrowableArgument(expr);
+                case 191 /* ParenthesizedExpression */:
+                    return isNarrowingExpression(expr.expression);
+                case 200 /* BinaryExpression */:
+                    return isNarrowingBinaryExpression(expr);
+                case 198 /* PrefixUnaryExpression */:
+                    return expr.operator === 51 /* ExclamationToken */ && isNarrowingExpression(expr.operand);
+            }
+            return false;
+        }
+        function isNarrowableReference(expr) {
+            return expr.kind === 71 /* Identifier */ ||
+                expr.kind === 99 /* ThisKeyword */ ||
+                expr.kind === 97 /* SuperKeyword */ ||
+                expr.kind === 185 /* PropertyAccessExpression */ && isNarrowableReference(expr.expression);
+        }
+        function hasNarrowableArgument(expr) {
+            if (expr.arguments) {
+                for (var _i = 0, _a = expr.arguments; _i < _a.length; _i++) {
+                    var argument = _a[_i];
+                    if (isNarrowableReference(argument)) {
+                        return true;
+                    }
+                }
+            }
+            if (expr.expression.kind === 185 /* PropertyAccessExpression */ &&
+                isNarrowableReference(expr.expression.expression)) {
+                return true;
+            }
+            return false;
+        }
+        function isNarrowingTypeofOperands(expr1, expr2) {
+            return ts.isTypeOfExpression(expr1) && isNarrowableOperand(expr1.expression) && ts.isStringLiteralLike(expr2);
+        }
+        function isNarrowableInOperands(left, right) {
+            return ts.isStringLiteralLike(left) && isNarrowingExpression(right);
+        }
+        function isNarrowingBinaryExpression(expr) {
+            switch (expr.operatorToken.kind) {
+                case 58 /* EqualsToken */:
+                    return isNarrowableReference(expr.left);
+                case 32 /* EqualsEqualsToken */:
+                case 33 /* ExclamationEqualsToken */:
+                case 34 /* EqualsEqualsEqualsToken */:
+                case 35 /* ExclamationEqualsEqualsToken */:
+                    return isNarrowableOperand(expr.left) || isNarrowableOperand(expr.right) ||
+                        isNarrowingTypeofOperands(expr.right, expr.left) || isNarrowingTypeofOperands(expr.left, expr.right);
+                case 93 /* InstanceOfKeyword */:
+                    return isNarrowableOperand(expr.left);
+                case 92 /* InKeyword */:
+                    return isNarrowableInOperands(expr.left, expr.right);
+                case 26 /* CommaToken */:
+                    return isNarrowingExpression(expr.right);
+            }
+            return false;
+        }
+        function isNarrowableOperand(expr) {
+            switch (expr.kind) {
+                case 191 /* ParenthesizedExpression */:
+                    return isNarrowableOperand(expr.expression);
+                case 200 /* BinaryExpression */:
+                    switch (expr.operatorToken.kind) {
+                        case 58 /* EqualsToken */:
+                            return isNarrowableOperand(expr.left);
+                        case 26 /* CommaToken */:
+                            return isNarrowableOperand(expr.right);
+                    }
+            }
+            return isNarrowableReference(expr);
+        }
+        function createBranchLabel() {
+            return {
+                flags: 4 /* BranchLabel */,
+                antecedents: undefined
+            };
+        }
+        function createLoopLabel() {
+            return {
+                flags: 8 /* LoopLabel */,
+                antecedents: undefined
+            };
+        }
+        function setFlowNodeReferenced(flow) {
+            // On first reference we set the Referenced flag, thereafter we set the Shared flag
+            flow.flags |= flow.flags & 512 /* Referenced */ ? 1024 /* Shared */ : 512 /* Referenced */;
+        }
+        function addAntecedent(label, antecedent) {
+            if (!(antecedent.flags & 1 /* Unreachable */) && !ts.contains(label.antecedents, antecedent)) {
+                (label.antecedents || (label.antecedents = [])).push(antecedent);
+                setFlowNodeReferenced(antecedent);
+            }
+        }
+        function createFlowCondition(flags, antecedent, expression) {
+            if (antecedent.flags & 1 /* Unreachable */) {
+                return antecedent;
+            }
+            if (!expression) {
+                return flags & 32 /* TrueCondition */ ? antecedent : unreachableFlow;
+            }
+            if (expression.kind === 101 /* TrueKeyword */ && flags & 64 /* FalseCondition */ ||
+                expression.kind === 86 /* FalseKeyword */ && flags & 32 /* TrueCondition */) {
+                return unreachableFlow;
+            }
+            if (!isNarrowingExpression(expression)) {
+                return antecedent;
+            }
+            setFlowNodeReferenced(antecedent);
+            return { flags: flags, expression: expression, antecedent: antecedent };
+        }
+        function createFlowSwitchClause(antecedent, switchStatement, clauseStart, clauseEnd) {
+            if (!isNarrowingExpression(switchStatement.expression)) {
+                return antecedent;
+            }
+            setFlowNodeReferenced(antecedent);
+            return { flags: 128 /* SwitchClause */, switchStatement: switchStatement, clauseStart: clauseStart, clauseEnd: clauseEnd, antecedent: antecedent };
+        }
+        function createFlowAssignment(antecedent, node) {
+            setFlowNodeReferenced(antecedent);
+            return { flags: 16 /* Assignment */, antecedent: antecedent, node: node };
+        }
+        function createFlowArrayMutation(antecedent, node) {
+            setFlowNodeReferenced(antecedent);
+            var res = { flags: 256 /* ArrayMutation */, antecedent: antecedent, node: node };
+            return res;
+        }
+        function finishFlowLabel(flow) {
+            var antecedents = flow.antecedents;
+            if (!antecedents) {
+                return unreachableFlow;
+            }
+            if (antecedents.length === 1) {
+                return antecedents[0];
+            }
+            return flow;
+        }
+        function isStatementCondition(node) {
+            var parent = node.parent;
+            switch (parent.kind) {
+                case 217 /* IfStatement */:
+                case 219 /* WhileStatement */:
+                case 218 /* DoStatement */:
+                    return parent.expression === node;
+                case 220 /* ForStatement */:
+                case 201 /* ConditionalExpression */:
+                    return parent.condition === node;
+            }
+            return false;
+        }
+        function isLogicalExpression(node) {
+            while (true) {
+                if (node.kind === 191 /* ParenthesizedExpression */) {
+                    node = node.expression;
+                }
+                else if (node.kind === 198 /* PrefixUnaryExpression */ && node.operator === 51 /* ExclamationToken */) {
+                    node = node.operand;
+                }
+                else {
+                    return node.kind === 200 /* BinaryExpression */ && (node.operatorToken.kind === 53 /* AmpersandAmpersandToken */ ||
+                        node.operatorToken.kind === 54 /* BarBarToken */);
+                }
+            }
+        }
+        function isTopLevelLogicalExpression(node) {
+            while (node.parent.kind === 191 /* ParenthesizedExpression */ ||
+                node.parent.kind === 198 /* PrefixUnaryExpression */ &&
+                    node.parent.operator === 51 /* ExclamationToken */) {
+                node = node.parent;
+            }
+            return !isStatementCondition(node) && !isLogicalExpression(node.parent);
+        }
+        function bindCondition(node, trueTarget, falseTarget) {
+            var saveTrueTarget = currentTrueTarget;
+            var saveFalseTarget = currentFalseTarget;
+            currentTrueTarget = trueTarget;
+            currentFalseTarget = falseTarget;
+            bind(node);
+            currentTrueTarget = saveTrueTarget;
+            currentFalseTarget = saveFalseTarget;
+            if (!node || !isLogicalExpression(node)) {
+                addAntecedent(trueTarget, createFlowCondition(32 /* TrueCondition */, currentFlow, node));
+                addAntecedent(falseTarget, createFlowCondition(64 /* FalseCondition */, currentFlow, node));
+            }
+        }
+        function bindIterativeStatement(node, breakTarget, continueTarget) {
+            var saveBreakTarget = currentBreakTarget;
+            var saveContinueTarget = currentContinueTarget;
+            currentBreakTarget = breakTarget;
+            currentContinueTarget = continueTarget;
+            bind(node);
+            currentBreakTarget = saveBreakTarget;
+            currentContinueTarget = saveContinueTarget;
+        }
+        function bindWhileStatement(node) {
+            var preWhileLabel = createLoopLabel();
+            var preBodyLabel = createBranchLabel();
+            var postWhileLabel = createBranchLabel();
+            addAntecedent(preWhileLabel, currentFlow);
+            currentFlow = preWhileLabel;
+            bindCondition(node.expression, preBodyLabel, postWhileLabel);
+            currentFlow = finishFlowLabel(preBodyLabel);
+            bindIterativeStatement(node.statement, postWhileLabel, preWhileLabel);
+            addAntecedent(preWhileLabel, currentFlow);
+            currentFlow = finishFlowLabel(postWhileLabel);
+        }
+        function bindDoStatement(node) {
+            var preDoLabel = createLoopLabel();
+            var enclosingLabeledStatement = node.parent.kind === 228 /* LabeledStatement */
+                ? ts.lastOrUndefined(activeLabels)
+                : undefined;
+            // if do statement is wrapped in labeled statement then target labels for break/continue with or without
+            // label should be the same
+            var preConditionLabel = enclosingLabeledStatement ? enclosingLabeledStatement.continueTarget : createBranchLabel();
+            var postDoLabel = enclosingLabeledStatement ? enclosingLabeledStatement.breakTarget : createBranchLabel();
+            addAntecedent(preDoLabel, currentFlow);
+            currentFlow = preDoLabel;
+            bindIterativeStatement(node.statement, postDoLabel, preConditionLabel);
+            addAntecedent(preConditionLabel, currentFlow);
+            currentFlow = finishFlowLabel(preConditionLabel);
+            bindCondition(node.expression, preDoLabel, postDoLabel);
+            currentFlow = finishFlowLabel(postDoLabel);
+        }
+        function bindForStatement(node) {
+            var preLoopLabel = createLoopLabel();
+            var preBodyLabel = createBranchLabel();
+            var postLoopLabel = createBranchLabel();
+            bind(node.initializer);
+            addAntecedent(preLoopLabel, currentFlow);
+            currentFlow = preLoopLabel;
+            bindCondition(node.condition, preBodyLabel, postLoopLabel);
+            currentFlow = finishFlowLabel(preBodyLabel);
+            bindIterativeStatement(node.statement, postLoopLabel, preLoopLabel);
+            bind(node.incrementor);
+            addAntecedent(preLoopLabel, currentFlow);
+            currentFlow = finishFlowLabel(postLoopLabel);
+        }
+        function bindForInOrForOfStatement(node) {
+            var preLoopLabel = createLoopLabel();
+            var postLoopLabel = createBranchLabel();
+            addAntecedent(preLoopLabel, currentFlow);
+            currentFlow = preLoopLabel;
+            if (node.kind === 222 /* ForOfStatement */) {
+                bind(node.awaitModifier);
+            }
+            bind(node.expression);
+            addAntecedent(postLoopLabel, currentFlow);
+            bind(node.initializer);
+            if (node.initializer.kind !== 233 /* VariableDeclarationList */) {
+                bindAssignmentTargetFlow(node.initializer);
+            }
+            bindIterativeStatement(node.statement, postLoopLabel, preLoopLabel);
+            addAntecedent(preLoopLabel, currentFlow);
+            currentFlow = finishFlowLabel(postLoopLabel);
+        }
+        function bindIfStatement(node) {
+            var thenLabel = createBranchLabel();
+            var elseLabel = createBranchLabel();
+            var postIfLabel = createBranchLabel();
+            bindCondition(node.expression, thenLabel, elseLabel);
+            currentFlow = finishFlowLabel(thenLabel);
+            bind(node.thenStatement);
+            addAntecedent(postIfLabel, currentFlow);
+            currentFlow = finishFlowLabel(elseLabel);
+            bind(node.elseStatement);
+            addAntecedent(postIfLabel, currentFlow);
+            currentFlow = finishFlowLabel(postIfLabel);
+        }
+        function bindReturnOrThrow(node) {
+            bind(node.expression);
+            if (node.kind === 225 /* ReturnStatement */) {
+                hasExplicitReturn = true;
+                if (currentReturnTarget) {
+                    addAntecedent(currentReturnTarget, currentFlow);
+                }
+            }
+            currentFlow = unreachableFlow;
+        }
+        function findActiveLabel(name) {
+            if (activeLabels) {
+                for (var _i = 0, activeLabels_1 = activeLabels; _i < activeLabels_1.length; _i++) {
+                    var label = activeLabels_1[_i];
+                    if (label.name === name) {
+                        return label;
+                    }
+                }
+            }
+            return undefined;
+        }
+        function bindBreakOrContinueFlow(node, breakTarget, continueTarget) {
+            var flowLabel = node.kind === 224 /* BreakStatement */ ? breakTarget : continueTarget;
+            if (flowLabel) {
+                addAntecedent(flowLabel, currentFlow);
+                currentFlow = unreachableFlow;
+            }
+        }
+        function bindBreakOrContinueStatement(node) {
+            bind(node.label);
+            if (node.label) {
+                var activeLabel = findActiveLabel(node.label.escapedText);
+                if (activeLabel) {
+                    activeLabel.referenced = true;
+                    bindBreakOrContinueFlow(node, activeLabel.breakTarget, activeLabel.continueTarget);
+                }
+            }
+            else {
+                bindBreakOrContinueFlow(node, currentBreakTarget, currentContinueTarget);
+            }
+        }
+        function bindTryStatement(node) {
+            var preFinallyLabel = createBranchLabel();
+            var preTryFlow = currentFlow;
+            // TODO: Every statement in try block is potentially an exit point!
+            bind(node.tryBlock);
+            addAntecedent(preFinallyLabel, currentFlow);
+            var flowAfterTry = currentFlow;
+            var flowAfterCatch = unreachableFlow;
+            if (node.catchClause) {
+                currentFlow = preTryFlow;
+                bind(node.catchClause);
+                addAntecedent(preFinallyLabel, currentFlow);
+                flowAfterCatch = currentFlow;
+            }
+            if (node.finallyBlock) {
+                // in finally flow is combined from pre-try/flow from try/flow from catch
+                // pre-flow is necessary to make sure that finally is reachable even if finally flows in both try and finally blocks are unreachable
+                // also for finally blocks we inject two extra edges into the flow graph.
+                // first -> edge that connects pre-try flow with the label at the beginning of the finally block, it has lock associated with it
+                // second -> edge that represents post-finally flow.
+                // these edges are used in following scenario:
+                // let a; (1)
+                // try { a = someOperation(); (2)}
+                // finally { (3) console.log(a) } (4)
+                // (5) a
+                // flow graph for this case looks roughly like this (arrows show ):
+                // (1-pre-try-flow) <--.. <-- (2-post-try-flow)
+                //  ^                                ^
+                //  |*****(3-pre-finally-label) -----|
+                //                ^
+                //                |-- ... <-- (4-post-finally-label) <--- (5)
+                // In case when we walk the flow starting from inside the finally block we want to take edge '*****' into account
+                // since it ensures that finally is always reachable. However when we start outside the finally block and go through label (5)
+                // then edge '*****' should be discarded because label 4 is only reachable if post-finally label-4 is reachable
+                // Simply speaking code inside finally block is treated as reachable as pre-try-flow
+                // since we conservatively assume that any line in try block can throw or return in which case we'll enter finally.
+                // However code after finally is reachable only if control flow was not abrupted in try/catch or finally blocks - it should be composed from
+                // final flows of these blocks without taking pre-try flow into account.
+                //
+                // extra edges that we inject allows to control this behavior
+                // if when walking the flow we step on post-finally edge - we can mark matching pre-finally edge as locked so it will be skipped.
+                var preFinallyFlow = { flags: 2048 /* PreFinally */, antecedent: preTryFlow, lock: {} };
+                addAntecedent(preFinallyLabel, preFinallyFlow);
+                currentFlow = finishFlowLabel(preFinallyLabel);
+                bind(node.finallyBlock);
+                // if flow after finally is unreachable - keep it
+                // otherwise check if flows after try and after catch are unreachable
+                // if yes - convert current flow to unreachable
+                // i.e.
+                // try { return "1" } finally { console.log(1); }
+                // console.log(2); // this line should be unreachable even if flow falls out of finally block
+                if (!(currentFlow.flags & 1 /* Unreachable */)) {
+                    if ((flowAfterTry.flags & 1 /* Unreachable */) && (flowAfterCatch.flags & 1 /* Unreachable */)) {
+                        currentFlow = flowAfterTry === reportedUnreachableFlow || flowAfterCatch === reportedUnreachableFlow
+                            ? reportedUnreachableFlow
+                            : unreachableFlow;
+                    }
+                }
+                if (!(currentFlow.flags & 1 /* Unreachable */)) {
+                    var afterFinallyFlow = { flags: 4096 /* AfterFinally */, antecedent: currentFlow };
+                    preFinallyFlow.lock = afterFinallyFlow;
+                    currentFlow = afterFinallyFlow;
+                }
+            }
+            else {
+                currentFlow = finishFlowLabel(preFinallyLabel);
+            }
+        }
+        function bindSwitchStatement(node) {
+            var postSwitchLabel = createBranchLabel();
+            bind(node.expression);
+            var saveBreakTarget = currentBreakTarget;
+            var savePreSwitchCaseFlow = preSwitchCaseFlow;
+            currentBreakTarget = postSwitchLabel;
+            preSwitchCaseFlow = currentFlow;
+            bind(node.caseBlock);
+            addAntecedent(postSwitchLabel, currentFlow);
+            var hasDefault = ts.forEach(node.caseBlock.clauses, function (c) { return c.kind === 267 /* DefaultClause */; });
+            // We mark a switch statement as possibly exhaustive if it has no default clause and if all
+            // case clauses have unreachable end points (e.g. they all return).
+            node.possiblyExhaustive = !hasDefault && !postSwitchLabel.antecedents;
+            if (!hasDefault) {
+                addAntecedent(postSwitchLabel, createFlowSwitchClause(preSwitchCaseFlow, node, 0, 0));
+            }
+            currentBreakTarget = saveBreakTarget;
+            preSwitchCaseFlow = savePreSwitchCaseFlow;
+            currentFlow = finishFlowLabel(postSwitchLabel);
+        }
+        function bindCaseBlock(node) {
+            var savedSubtreeTransformFlags = subtreeTransformFlags;
+            subtreeTransformFlags = 0;
+            var clauses = node.clauses;
+            var fallthroughFlow = unreachableFlow;
+            for (var i = 0; i < clauses.length; i++) {
+                var clauseStart = i;
+                while (!clauses[i].statements.length && i + 1 < clauses.length) {
+                    bind(clauses[i]);
+                    i++;
+                }
+                var preCaseLabel = createBranchLabel();
+                addAntecedent(preCaseLabel, createFlowSwitchClause(preSwitchCaseFlow, node.parent, clauseStart, i + 1));
+                addAntecedent(preCaseLabel, createFlowSwitchClause(preSwitchCaseFlow, node.parent, clauseStart, i + 1));
+                addAntecedent(preCaseLabel, fallthroughFlow);
+                currentFlow = finishFlowLabel(preCaseLabel);
+                var clause = clauses[i];
+                bind(clause);
+                fallthroughFlow = currentFlow;
+                if (!(currentFlow.flags & 1 /* Unreachable */) && i !== clauses.length - 1 && options.noFallthroughCasesInSwitch) {
+                    errorOnFirstToken(clause, ts.Diagnostics.Fallthrough_case_in_switch);
+                }
+            }
+            clauses.transformFlags = subtreeTransformFlags | 536870912 /* HasComputedFlags */;
+            subtreeTransformFlags |= savedSubtreeTransformFlags;
+        }
+        function bindCaseClause(node) {
+            var saveCurrentFlow = currentFlow;
+            currentFlow = preSwitchCaseFlow;
+            bind(node.expression);
+            currentFlow = saveCurrentFlow;
+            bindEach(node.statements);
+        }
+        function pushActiveLabel(name, breakTarget, continueTarget) {
+            var activeLabel = {
+                name: name,
+                breakTarget: breakTarget,
+                continueTarget: continueTarget,
+                referenced: false
+            };
+            (activeLabels || (activeLabels = [])).push(activeLabel);
+            return activeLabel;
+        }
+        function popActiveLabel() {
+            activeLabels.pop();
+        }
+        function bindLabeledStatement(node) {
+            var preStatementLabel = createLoopLabel();
+            var postStatementLabel = createBranchLabel();
+            bind(node.label);
+            addAntecedent(preStatementLabel, currentFlow);
+            var activeLabel = pushActiveLabel(node.label.escapedText, postStatementLabel, preStatementLabel);
+            bind(node.statement);
+            popActiveLabel();
+            if (!activeLabel.referenced && !options.allowUnusedLabels) {
+                errorOrSuggestionOnFirstToken(ts.unusedLabelIsError(options), node, ts.Diagnostics.Unused_label);
+            }
+            if (!node.statement || node.statement.kind !== 218 /* DoStatement */) {
+                // do statement sets current flow inside bindDoStatement
+                addAntecedent(postStatementLabel, currentFlow);
+                currentFlow = finishFlowLabel(postStatementLabel);
+            }
+        }
+        function bindDestructuringTargetFlow(node) {
+            if (node.kind === 200 /* BinaryExpression */ && node.operatorToken.kind === 58 /* EqualsToken */) {
+                bindAssignmentTargetFlow(node.left);
+            }
+            else {
+                bindAssignmentTargetFlow(node);
+            }
+        }
+        function bindAssignmentTargetFlow(node) {
+            if (isNarrowableReference(node)) {
+                currentFlow = createFlowAssignment(currentFlow, node);
+            }
+            else if (node.kind === 183 /* ArrayLiteralExpression */) {
+                for (var _i = 0, _a = node.elements; _i < _a.length; _i++) {
+                    var e = _a[_i];
+                    if (e.kind === 204 /* SpreadElement */) {
+                        bindAssignmentTargetFlow(e.expression);
+                    }
+                    else {
+                        bindDestructuringTargetFlow(e);
+                    }
+                }
+            }
+            else if (node.kind === 184 /* ObjectLiteralExpression */) {
+                for (var _b = 0, _c = node.properties; _b < _c.length; _b++) {
+                    var p = _c[_b];
+                    if (p.kind === 270 /* PropertyAssignment */) {
+                        bindDestructuringTargetFlow(p.initializer);
+                    }
+                    else if (p.kind === 271 /* ShorthandPropertyAssignment */) {
+                        bindAssignmentTargetFlow(p.name);
+                    }
+                    else if (p.kind === 272 /* SpreadAssignment */) {
+                        bindAssignmentTargetFlow(p.expression);
+                    }
+                }
+            }
+        }
+        function bindLogicalExpression(node, trueTarget, falseTarget) {
+            var preRightLabel = createBranchLabel();
+            if (node.operatorToken.kind === 53 /* AmpersandAmpersandToken */) {
+                bindCondition(node.left, preRightLabel, falseTarget);
+            }
+            else {
+                bindCondition(node.left, trueTarget, preRightLabel);
+            }
+            currentFlow = finishFlowLabel(preRightLabel);
+            bind(node.operatorToken);
+            bindCondition(node.right, trueTarget, falseTarget);
+        }
+        function bindPrefixUnaryExpressionFlow(node) {
+            if (node.operator === 51 /* ExclamationToken */) {
+                var saveTrueTarget = currentTrueTarget;
+                currentTrueTarget = currentFalseTarget;
+                currentFalseTarget = saveTrueTarget;
+                bindEachChild(node);
+                currentFalseTarget = currentTrueTarget;
+                currentTrueTarget = saveTrueTarget;
+            }
+            else {
+                bindEachChild(node);
+                if (node.operator === 43 /* PlusPlusToken */ || node.operator === 44 /* MinusMinusToken */) {
+                    bindAssignmentTargetFlow(node.operand);
+                }
+            }
+        }
+        function bindPostfixUnaryExpressionFlow(node) {
+            bindEachChild(node);
+            if (node.operator === 43 /* PlusPlusToken */ || node.operator === 44 /* MinusMinusToken */) {
+                bindAssignmentTargetFlow(node.operand);
+            }
+        }
+        function bindBinaryExpressionFlow(node) {
+            var operator = node.operatorToken.kind;
+            if (operator === 53 /* AmpersandAmpersandToken */ || operator === 54 /* BarBarToken */) {
+                if (isTopLevelLogicalExpression(node)) {
+                    var postExpressionLabel = createBranchLabel();
+                    bindLogicalExpression(node, postExpressionLabel, postExpressionLabel);
+                    currentFlow = finishFlowLabel(postExpressionLabel);
+                }
+                else {
+                    bindLogicalExpression(node, currentTrueTarget, currentFalseTarget);
+                }
+            }
+            else {
+                bindEachChild(node);
+                if (ts.isAssignmentOperator(operator) && !ts.isAssignmentTarget(node)) {
+                    bindAssignmentTargetFlow(node.left);
+                    if (operator === 58 /* EqualsToken */ && node.left.kind === 186 /* ElementAccessExpression */) {
+                        var elementAccess = node.left;
+                        if (isNarrowableOperand(elementAccess.expression)) {
+                            currentFlow = createFlowArrayMutation(currentFlow, node);
+                        }
+                    }
+                }
+            }
+        }
+        function bindDeleteExpressionFlow(node) {
+            bindEachChild(node);
+            if (node.expression.kind === 185 /* PropertyAccessExpression */) {
+                bindAssignmentTargetFlow(node.expression);
+            }
+        }
+        function bindConditionalExpressionFlow(node) {
+            var trueLabel = createBranchLabel();
+            var falseLabel = createBranchLabel();
+            var postExpressionLabel = createBranchLabel();
+            bindCondition(node.condition, trueLabel, falseLabel);
+            currentFlow = finishFlowLabel(trueLabel);
+            bind(node.questionToken);
+            bind(node.whenTrue);
+            addAntecedent(postExpressionLabel, currentFlow);
+            currentFlow = finishFlowLabel(falseLabel);
+            bind(node.colonToken);
+            bind(node.whenFalse);
+            addAntecedent(postExpressionLabel, currentFlow);
+            currentFlow = finishFlowLabel(postExpressionLabel);
+        }
+        function bindInitializedVariableFlow(node) {
+            var name = !ts.isOmittedExpression(node) ? node.name : undefined;
+            if (ts.isBindingPattern(name)) {
+                for (var _i = 0, _a = name.elements; _i < _a.length; _i++) {
+                    var child = _a[_i];
+                    bindInitializedVariableFlow(child);
+                }
+            }
+            else {
+                currentFlow = createFlowAssignment(currentFlow, node);
+            }
+        }
+        function bindVariableDeclarationFlow(node) {
+            bindEachChild(node);
+            if (node.initializer || ts.isForInOrOfStatement(node.parent.parent)) {
+                bindInitializedVariableFlow(node);
+            }
+        }
+        function bindJSDocTypeAlias(node) {
+            if (node.fullName) {
+                setParentPointers(node, node.fullName);
+            }
+        }
+        function bindCallExpressionFlow(node) {
+            // If the target of the call expression is a function expression or arrow function we have
+            // an immediately invoked function expression (IIFE). Initialize the flowNode property to
+            // the current control flow (which includes evaluation of the IIFE arguments).
+            var expr = node.expression;
+            while (expr.kind === 191 /* ParenthesizedExpression */) {
+                expr = expr.expression;
+            }
+            if (expr.kind === 192 /* FunctionExpression */ || expr.kind === 193 /* ArrowFunction */) {
+                bindEach(node.typeArguments);
+                bindEach(node.arguments);
+                bind(node.expression);
+            }
+            else {
+                bindEachChild(node);
+            }
+            if (node.expression.kind === 185 /* PropertyAccessExpression */) {
+                var propertyAccess = node.expression;
+                if (isNarrowableOperand(propertyAccess.expression) && ts.isPushOrUnshiftIdentifier(propertyAccess.name)) {
+                    currentFlow = createFlowArrayMutation(currentFlow, node);
+                }
+            }
+        }
+        function getContainerFlags(node) {
+            switch (node.kind) {
+                case 205 /* ClassExpression */:
+                case 235 /* ClassDeclaration */:
+                case 238 /* EnumDeclaration */:
+                case 184 /* ObjectLiteralExpression */:
+                case 166 /* TypeLiteral */:
+                case 287 /* JSDocTypeLiteral */:
+                case 263 /* JsxAttributes */:
+                    return 1 /* IsContainer */;
+                case 236 /* InterfaceDeclaration */:
+                    return 1 /* IsContainer */ | 64 /* IsInterface */;
+                case 239 /* ModuleDeclaration */:
+                case 237 /* TypeAliasDeclaration */:
+                case 177 /* MappedType */:
+                    return 1 /* IsContainer */ | 32 /* HasLocals */;
+                case 274 /* SourceFile */:
+                    return 1 /* IsContainer */ | 4 /* IsControlFlowContainer */ | 32 /* HasLocals */;
+                case 154 /* MethodDeclaration */:
+                    if (ts.isObjectLiteralOrClassExpressionMethod(node)) {
+                        return 1 /* IsContainer */ | 4 /* IsControlFlowContainer */ | 32 /* HasLocals */ | 8 /* IsFunctionLike */ | 128 /* IsObjectLiteralOrClassExpressionMethod */;
+                    }
+                // falls through
+                case 155 /* Constructor */:
+                case 234 /* FunctionDeclaration */:
+                case 153 /* MethodSignature */:
+                case 156 /* GetAccessor */:
+                case 157 /* SetAccessor */:
+                case 158 /* CallSignature */:
+                case 288 /* JSDocSignature */:
+                case 284 /* JSDocFunctionType */:
+                case 163 /* FunctionType */:
+                case 159 /* ConstructSignature */:
+                case 160 /* IndexSignature */:
+                case 164 /* ConstructorType */:
+                    return 1 /* IsContainer */ | 4 /* IsControlFlowContainer */ | 32 /* HasLocals */ | 8 /* IsFunctionLike */;
+                case 192 /* FunctionExpression */:
+                case 193 /* ArrowFunction */:
+                    return 1 /* IsContainer */ | 4 /* IsControlFlowContainer */ | 32 /* HasLocals */ | 8 /* IsFunctionLike */ | 16 /* IsFunctionExpression */;
+                case 240 /* ModuleBlock */:
+                    return 4 /* IsControlFlowContainer */;
+                case 152 /* PropertyDeclaration */:
+                    return node.initializer ? 4 /* IsControlFlowContainer */ : 0;
+                case 269 /* CatchClause */:
+                case 220 /* ForStatement */:
+                case 221 /* ForInStatement */:
+                case 222 /* ForOfStatement */:
+                case 241 /* CaseBlock */:
+                    return 2 /* IsBlockScopedContainer */;
+                case 213 /* Block */:
+                    // do not treat blocks directly inside a function as a block-scoped-container.
+                    // Locals that reside in this block should go to the function locals. Otherwise 'x'
+                    // would not appear to be a redeclaration of a block scoped local in the following
+                    // example:
+                    //
+                    //      function foo() {
+                    //          var x;
+                    //          let x;
+                    //      }
+                    //
+                    // If we placed 'var x' into the function locals and 'let x' into the locals of
+                    // the block, then there would be no collision.
+                    //
+                    // By not creating a new block-scoped-container here, we ensure that both 'var x'
+                    // and 'let x' go into the Function-container's locals, and we do get a collision
+                    // conflict.
+                    return ts.isFunctionLike(node.parent) ? 0 /* None */ : 2 /* IsBlockScopedContainer */;
+            }
+            return 0 /* None */;
+        }
+        function addToContainerChain(next) {
+            if (lastContainer) {
+                lastContainer.nextContainer = next;
+            }
+            lastContainer = next;
+        }
+        function declareSymbolAndAddToSymbolTable(node, symbolFlags, symbolExcludes) {
+            switch (container.kind) {
+                // Modules, source files, and classes need specialized handling for how their
+                // members are declared (for example, a member of a class will go into a specific
+                // symbol table depending on if it is static or not). We defer to specialized
+                // handlers to take care of declaring these child members.
+                case 239 /* ModuleDeclaration */:
+                    return declareModuleMember(node, symbolFlags, symbolExcludes);
+                case 274 /* SourceFile */:
+                    return declareSourceFileMember(node, symbolFlags, symbolExcludes);
+                case 205 /* ClassExpression */:
+                case 235 /* ClassDeclaration */:
+                    return declareClassMember(node, symbolFlags, symbolExcludes);
+                case 238 /* EnumDeclaration */:
+                    return declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
+                case 166 /* TypeLiteral */:
+                case 287 /* JSDocTypeLiteral */:
+                case 184 /* ObjectLiteralExpression */:
+                case 236 /* InterfaceDeclaration */:
+                case 263 /* JsxAttributes */:
+                    // Interface/Object-types always have their children added to the 'members' of
+                    // their container. They are only accessible through an instance of their
+                    // container, and are never in scope otherwise (even inside the body of the
+                    // object / type / interface declaring them). An exception is type parameters,
+                    // which are in scope without qualification (similar to 'locals').
+                    return declareSymbol(container.symbol.members, container.symbol, node, symbolFlags, symbolExcludes);
+                case 163 /* FunctionType */:
+                case 164 /* ConstructorType */:
+                case 158 /* CallSignature */:
+                case 159 /* ConstructSignature */:
+                case 288 /* JSDocSignature */:
+                case 160 /* IndexSignature */:
+                case 154 /* MethodDeclaration */:
+                case 153 /* MethodSignature */:
+                case 155 /* Constructor */:
+                case 156 /* GetAccessor */:
+                case 157 /* SetAccessor */:
+                case 234 /* FunctionDeclaration */:
+                case 192 /* FunctionExpression */:
+                case 193 /* ArrowFunction */:
+                case 284 /* JSDocFunctionType */:
+                case 297 /* JSDocTypedefTag */:
+                case 292 /* JSDocCallbackTag */:
+                case 237 /* TypeAliasDeclaration */:
+                case 177 /* MappedType */:
+                    // All the children of these container types are never visible through another
+                    // symbol (i.e. through another symbol's 'exports' or 'members').  Instead,
+                    // they're only accessed 'lexically' (i.e. from code that exists underneath
+                    // their container in the tree). To accomplish this, we simply add their declared
+                    // symbol to the 'locals' of the container.  These symbols can then be found as
+                    // the type checker walks up the containers, checking them for matching names.
+                    return declareSymbol(container.locals, /*parent*/ undefined, node, symbolFlags, symbolExcludes);
+            }
+        }
+        function declareClassMember(node, symbolFlags, symbolExcludes) {
+            return ts.hasModifier(node, 32 /* Static */)
+                ? declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes)
+                : declareSymbol(container.symbol.members, container.symbol, node, symbolFlags, symbolExcludes);
+        }
+        function declareSourceFileMember(node, symbolFlags, symbolExcludes) {
+            return ts.isExternalModule(file)
+                ? declareModuleMember(node, symbolFlags, symbolExcludes)
+                : declareSymbol(file.locals, /*parent*/ undefined, node, symbolFlags, symbolExcludes);
+        }
+        function hasExportDeclarations(node) {
+            var body = node.kind === 274 /* SourceFile */ ? node : node.body;
+            if (body && (body.kind === 274 /* SourceFile */ || body.kind === 240 /* ModuleBlock */)) {
+                for (var _i = 0, _a = body.statements; _i < _a.length; _i++) {
+                    var stat = _a[_i];
+                    if (stat.kind === 250 /* ExportDeclaration */ || stat.kind === 249 /* ExportAssignment */) {
+                        return true;
+                    }
+                }
+            }
+            return false;
+        }
+        function setExportContextFlag(node) {
+            // A declaration source file or ambient module declaration that contains no export declarations (but possibly regular
+            // declarations with export modifiers) is an export context in which declarations are implicitly exported.
+            if (node.flags & 4194304 /* Ambient */ && !hasExportDeclarations(node)) {
+                node.flags |= 32 /* ExportContext */;
+            }
+            else {
+                node.flags &= ~32 /* ExportContext */;
+            }
+        }
+        function bindModuleDeclaration(node) {
+            setExportContextFlag(node);
+            if (ts.isAmbientModule(node)) {
+                if (ts.hasModifier(node, 1 /* Export */)) {
+                    errorOnFirstToken(node, ts.Diagnostics.export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always_visible);
+                }
+                if (ts.isModuleAugmentationExternal(node)) {
+                    declareModuleSymbol(node);
+                }
+                else {
+                    var pattern = void 0;
+                    if (node.name.kind === 9 /* StringLiteral */) {
+                        var text = node.name.text;
+                        if (ts.hasZeroOrOneAsteriskCharacter(text)) {
+                            pattern = ts.tryParsePattern(text);
+                        }
+                        else {
+                            errorOnFirstToken(node.name, ts.Diagnostics.Pattern_0_can_have_at_most_one_Asterisk_character, text);
+                        }
+                    }
+                    var symbol = declareSymbolAndAddToSymbolTable(node, 512 /* ValueModule */, 67215503 /* ValueModuleExcludes */);
+                    file.patternAmbientModules = ts.append(file.patternAmbientModules, pattern && { pattern: pattern, symbol: symbol });
+                }
+            }
+            else {
+                var state = declareModuleSymbol(node);
+                if (state !== 0 /* NonInstantiated */) {
+                    var symbol = node.symbol;
+                    // if module was already merged with some function, class or non-const enum, treat it as non-const-enum-only
+                    symbol.constEnumOnlyModule = (!(symbol.flags & (16 /* Function */ | 32 /* Class */ | 256 /* RegularEnum */)))
+                        // Current must be `const enum` only
+                        && state === 2 /* ConstEnumOnly */
+                        // Can't have been set to 'false' in a previous merged symbol. ('undefined' OK)
+                        && symbol.constEnumOnlyModule !== false;
+                }
+            }
+        }
+        function declareModuleSymbol(node) {
+            var state = getModuleInstanceState(node);
+            var instantiated = state !== 0 /* NonInstantiated */;
+            declareSymbolAndAddToSymbolTable(node, instantiated ? 512 /* ValueModule */ : 1024 /* NamespaceModule */, instantiated ? 67215503 /* ValueModuleExcludes */ : 0 /* NamespaceModuleExcludes */);
+            return state;
+        }
+        function bindFunctionOrConstructorType(node) {
+            // For a given function symbol "<...>(...) => T" we want to generate a symbol identical
+            // to the one we would get for: { <...>(...): T }
+            //
+            // We do that by making an anonymous type literal symbol, and then setting the function
+            // symbol as its sole member. To the rest of the system, this symbol will be indistinguishable
+            // from an actual type literal symbol you would have gotten had you used the long form.
+            var symbol = createSymbol(131072 /* Signature */, getDeclarationName(node)); // TODO: GH#18217
+            addDeclarationToSymbol(symbol, node, 131072 /* Signature */);
+            var typeLiteralSymbol = createSymbol(2048 /* TypeLiteral */, "__type" /* Type */);
+            addDeclarationToSymbol(typeLiteralSymbol, node, 2048 /* TypeLiteral */);
+            typeLiteralSymbol.members = ts.createSymbolTable();
+            typeLiteralSymbol.members.set(symbol.escapedName, symbol);
+        }
+        function bindObjectLiteralExpression(node) {
+            var ElementKind;
+            (function (ElementKind) {
+                ElementKind[ElementKind["Property"] = 1] = "Property";
+                ElementKind[ElementKind["Accessor"] = 2] = "Accessor";
+            })(ElementKind || (ElementKind = {}));
+            if (inStrictMode) {
+                var seen = ts.createUnderscoreEscapedMap();
+                for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
+                    var prop = _a[_i];
+                    if (prop.kind === 272 /* SpreadAssignment */ || prop.name.kind !== 71 /* Identifier */) {
+                        continue;
+                    }
+                    var identifier = prop.name;
+                    // ECMA-262 11.1.5 Object Initializer
+                    // If previous is not undefined then throw a SyntaxError exception if any of the following conditions are true
+                    // a.This production is contained in strict code and IsDataDescriptor(previous) is true and
+                    // IsDataDescriptor(propId.descriptor) is true.
+                    //    b.IsDataDescriptor(previous) is true and IsAccessorDescriptor(propId.descriptor) is true.
+                    //    c.IsAccessorDescriptor(previous) is true and IsDataDescriptor(propId.descriptor) is true.
+                    //    d.IsAccessorDescriptor(previous) is true and IsAccessorDescriptor(propId.descriptor) is true
+                    // and either both previous and propId.descriptor have[[Get]] fields or both previous and propId.descriptor have[[Set]] fields
+                    var currentKind = prop.kind === 270 /* PropertyAssignment */ || prop.kind === 271 /* ShorthandPropertyAssignment */ || prop.kind === 154 /* MethodDeclaration */
+                        ? 1 /* Property */
+                        : 2 /* Accessor */;
+                    var existingKind = seen.get(identifier.escapedText);
+                    if (!existingKind) {
+                        seen.set(identifier.escapedText, currentKind);
+                        continue;
+                    }
+                    if (currentKind === 1 /* Property */ && existingKind === 1 /* Property */) {
+                        var span = ts.getErrorSpanForNode(file, identifier);
+                        file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, ts.Diagnostics.An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode));
+                    }
+                }
+            }
+            return bindAnonymousDeclaration(node, 4096 /* ObjectLiteral */, "__object" /* Object */);
+        }
+        function bindJsxAttributes(node) {
+            return bindAnonymousDeclaration(node, 4096 /* ObjectLiteral */, "__jsxAttributes" /* JSXAttributes */);
+        }
+        function bindJsxAttribute(node, symbolFlags, symbolExcludes) {
+            return declareSymbolAndAddToSymbolTable(node, symbolFlags, symbolExcludes);
+        }
+        function bindAnonymousDeclaration(node, symbolFlags, name) {
+            var symbol = createSymbol(symbolFlags, name);
+            if (symbolFlags & (8 /* EnumMember */ | 106500 /* ClassMember */)) {
+                symbol.parent = container.symbol;
+            }
+            addDeclarationToSymbol(symbol, node, symbolFlags);
+            return symbol;
+        }
+        function bindBlockScopedDeclaration(node, symbolFlags, symbolExcludes) {
+            switch (blockScopeContainer.kind) {
+                case 239 /* ModuleDeclaration */:
+                    declareModuleMember(node, symbolFlags, symbolExcludes);
+                    break;
+                case 274 /* SourceFile */:
+                    if (ts.isExternalOrCommonJsModule(container)) {
+                        declareModuleMember(node, symbolFlags, symbolExcludes);
+                        break;
+                    }
+                // falls through
+                default:
+                    if (!blockScopeContainer.locals) {
+                        blockScopeContainer.locals = ts.createSymbolTable();
+                        addToContainerChain(blockScopeContainer);
+                    }
+                    declareSymbol(blockScopeContainer.locals, /*parent*/ undefined, node, symbolFlags, symbolExcludes);
+            }
+        }
+        function bindBlockScopedVariableDeclaration(node) {
+            bindBlockScopedDeclaration(node, 2 /* BlockScopedVariable */, 67216319 /* BlockScopedVariableExcludes */);
+        }
+        function delayedBindJSDocTypedefTag() {
+            if (!delayedTypeAliases) {
+                return;
+            }
+            var saveContainer = container;
+            var saveLastContainer = lastContainer;
+            var saveBlockScopeContainer = blockScopeContainer;
+            var saveParent = parent;
+            var saveCurrentFlow = currentFlow;
+            for (var _i = 0, delayedTypeAliases_1 = delayedTypeAliases; _i < delayedTypeAliases_1.length; _i++) {
+                var typeAlias = delayedTypeAliases_1[_i];
+                var host = ts.getJSDocHost(typeAlias);
+                container = ts.findAncestor(host.parent, function (n) { return !!(getContainerFlags(n) & 1 /* IsContainer */); }) || file;
+                blockScopeContainer = ts.getEnclosingBlockScopeContainer(host) || file;
+                currentFlow = { flags: 2 /* Start */ };
+                parent = typeAlias;
+                bind(typeAlias.typeExpression);
+                if (!typeAlias.fullName || typeAlias.fullName.kind === 71 /* Identifier */) {
+                    parent = typeAlias.parent;
+                    bindBlockScopedDeclaration(typeAlias, 524288 /* TypeAlias */, 67901928 /* TypeAliasExcludes */);
+                }
+                else {
+                    bind(typeAlias.fullName);
+                }
+            }
+            container = saveContainer;
+            lastContainer = saveLastContainer;
+            blockScopeContainer = saveBlockScopeContainer;
+            parent = saveParent;
+            currentFlow = saveCurrentFlow;
+        }
+        // The binder visits every node in the syntax tree so it is a convenient place to perform a single localized
+        // check for reserved words used as identifiers in strict mode code.
+        function checkStrictModeIdentifier(node) {
+            if (inStrictMode &&
+                node.originalKeywordKind >= 108 /* FirstFutureReservedWord */ &&
+                node.originalKeywordKind <= 116 /* LastFutureReservedWord */ &&
+                !ts.isIdentifierName(node) &&
+                !(node.flags & 4194304 /* Ambient */)) {
+                // Report error only if there are no parse errors in file
+                if (!file.parseDiagnostics.length) {
+                    file.bindDiagnostics.push(createDiagnosticForNode(node, getStrictModeIdentifierMessage(node), ts.declarationNameToString(node)));
+                }
+            }
+        }
+        function getStrictModeIdentifierMessage(node) {
+            // Provide specialized messages to help the user understand why we think they're in
+            // strict mode.
+            if (ts.getContainingClass(node)) {
+                return ts.Diagnostics.Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_strict_mode;
+            }
+            if (file.externalModuleIndicator) {
+                return ts.Diagnostics.Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode;
+            }
+            return ts.Diagnostics.Identifier_expected_0_is_a_reserved_word_in_strict_mode;
+        }
+        function checkStrictModeBinaryExpression(node) {
+            if (inStrictMode && ts.isLeftHandSideExpression(node.left) && ts.isAssignmentOperator(node.operatorToken.kind)) {
+                // ECMA 262 (Annex C) The identifier eval or arguments may not appear as the LeftHandSideExpression of an
+                // Assignment operator(11.13) or of a PostfixExpression(11.3)
+                checkStrictModeEvalOrArguments(node, node.left);
+            }
+        }
+        function checkStrictModeCatchClause(node) {
+            // It is a SyntaxError if a TryStatement with a Catch occurs within strict code and the Identifier of the
+            // Catch production is eval or arguments
+            if (inStrictMode && node.variableDeclaration) {
+                checkStrictModeEvalOrArguments(node, node.variableDeclaration.name);
+            }
+        }
+        function checkStrictModeDeleteExpression(node) {
+            // Grammar checking
+            if (inStrictMode && node.expression.kind === 71 /* Identifier */) {
+                // When a delete operator occurs within strict mode code, a SyntaxError is thrown if its
+                // UnaryExpression is a direct reference to a variable, function argument, or function name
+                var span = ts.getErrorSpanForNode(file, node.expression);
+                file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, ts.Diagnostics.delete_cannot_be_called_on_an_identifier_in_strict_mode));
+            }
+        }
+        function isEvalOrArgumentsIdentifier(node) {
+            return ts.isIdentifier(node) && (node.escapedText === "eval" || node.escapedText === "arguments");
+        }
+        function checkStrictModeEvalOrArguments(contextNode, name) {
+            if (name && name.kind === 71 /* Identifier */) {
+                var identifier = name;
+                if (isEvalOrArgumentsIdentifier(identifier)) {
+                    // We check first if the name is inside class declaration or class expression; if so give explicit message
+                    // otherwise report generic error message.
+                    var span = ts.getErrorSpanForNode(file, name);
+                    file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, getStrictModeEvalOrArgumentsMessage(contextNode), ts.idText(identifier)));
+                }
+            }
+        }
+        function getStrictModeEvalOrArgumentsMessage(node) {
+            // Provide specialized messages to help the user understand why we think they're in
+            // strict mode.
+            if (ts.getContainingClass(node)) {
+                return ts.Diagnostics.Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode;
+            }
+            if (file.externalModuleIndicator) {
+                return ts.Diagnostics.Invalid_use_of_0_Modules_are_automatically_in_strict_mode;
+            }
+            return ts.Diagnostics.Invalid_use_of_0_in_strict_mode;
+        }
+        function checkStrictModeFunctionName(node) {
+            if (inStrictMode) {
+                // It is a SyntaxError if the identifier eval or arguments appears within a FormalParameterList of a strict mode FunctionDeclaration or FunctionExpression (13.1))
+                checkStrictModeEvalOrArguments(node, node.name);
+            }
+        }
+        function getStrictModeBlockScopeFunctionDeclarationMessage(node) {
+            // Provide specialized messages to help the user understand why we think they're in
+            // strict mode.
+            if (ts.getContainingClass(node)) {
+                return ts.Diagnostics.Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_definitions_are_automatically_in_strict_mode;
+            }
+            if (file.externalModuleIndicator) {
+                return ts.Diagnostics.Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_are_automatically_in_strict_mode;
+            }
+            return ts.Diagnostics.Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5;
+        }
+        function checkStrictModeFunctionDeclaration(node) {
+            if (languageVersion < 2 /* ES2015 */) {
+                // Report error if function is not top level function declaration
+                if (blockScopeContainer.kind !== 274 /* SourceFile */ &&
+                    blockScopeContainer.kind !== 239 /* ModuleDeclaration */ &&
+                    !ts.isFunctionLike(blockScopeContainer)) {
+                    // We check first if the name is inside class declaration or class expression; if so give explicit message
+                    // otherwise report generic error message.
+                    var errorSpan = ts.getErrorSpanForNode(file, node);
+                    file.bindDiagnostics.push(ts.createFileDiagnostic(file, errorSpan.start, errorSpan.length, getStrictModeBlockScopeFunctionDeclarationMessage(node)));
+                }
+            }
+        }
+        function checkStrictModeNumericLiteral(node) {
+            if (inStrictMode && node.numericLiteralFlags & 32 /* Octal */) {
+                file.bindDiagnostics.push(createDiagnosticForNode(node, ts.Diagnostics.Octal_literals_are_not_allowed_in_strict_mode));
+            }
+        }
+        function checkStrictModePostfixUnaryExpression(node) {
+            // Grammar checking
+            // The identifier eval or arguments may not appear as the LeftHandSideExpression of an
+            // Assignment operator(11.13) or of a PostfixExpression(11.3) or as the UnaryExpression
+            // operated upon by a Prefix Increment(11.4.4) or a Prefix Decrement(11.4.5) operator.
+            if (inStrictMode) {
+                checkStrictModeEvalOrArguments(node, node.operand);
+            }
+        }
+        function checkStrictModePrefixUnaryExpression(node) {
+            // Grammar checking
+            if (inStrictMode) {
+                if (node.operator === 43 /* PlusPlusToken */ || node.operator === 44 /* MinusMinusToken */) {
+                    checkStrictModeEvalOrArguments(node, node.operand);
+                }
+            }
+        }
+        function checkStrictModeWithStatement(node) {
+            // Grammar checking for withStatement
+            if (inStrictMode) {
+                errorOnFirstToken(node, ts.Diagnostics.with_statements_are_not_allowed_in_strict_mode);
+            }
+        }
+        function errorOnFirstToken(node, message, arg0, arg1, arg2) {
+            var span = ts.getSpanOfTokenAtPosition(file, node.pos);
+            file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, message, arg0, arg1, arg2));
+        }
+        function errorOrSuggestionOnFirstToken(isError, node, message, arg0, arg1, arg2) {
+            var span = ts.getSpanOfTokenAtPosition(file, node.pos);
+            var diag = ts.createFileDiagnostic(file, span.start, span.length, message, arg0, arg1, arg2);
+            if (isError) {
+                file.bindDiagnostics.push(diag);
+            }
+            else {
+                file.bindSuggestionDiagnostics = ts.append(file.bindSuggestionDiagnostics, __assign({}, diag, { category: ts.DiagnosticCategory.Suggestion }));
+            }
+        }
+        function bind(node) {
+            if (!node) {
+                return;
+            }
+            node.parent = parent;
+            var saveInStrictMode = inStrictMode;
+            // Even though in the AST the jsdoc @typedef node belongs to the current node,
+            // its symbol might be in the same scope with the current node's symbol. Consider:
+            //
+            //     /** @typedef {string | number} MyType */
+            //     function foo();
+            //
+            // Here the current node is "foo", which is a container, but the scope of "MyType" should
+            // not be inside "foo". Therefore we always bind @typedef before bind the parent node,
+            // and skip binding this tag later when binding all the other jsdoc tags.
+            // First we bind declaration nodes to a symbol if possible. We'll both create a symbol
+            // and then potentially add the symbol to an appropriate symbol table. Possible
+            // destination symbol tables are:
+            //
+            //  1) The 'exports' table of the current container's symbol.
+            //  2) The 'members' table of the current container's symbol.
+            //  3) The 'locals' table of the current container.
+            //
+            // However, not all symbols will end up in any of these tables. 'Anonymous' symbols
+            // (like TypeLiterals for example) will not be put in any table.
+            bindWorker(node);
+            // Then we recurse into the children of the node to bind them as well. For certain
+            // symbols we do specialized work when we recurse. For example, we'll keep track of
+            // the current 'container' node when it changes. This helps us know which symbol table
+            // a local should go into for example. Since terminal nodes are known not to have
+            // children, as an optimization we don't process those.
+            if (node.kind > 145 /* LastToken */) {
+                var saveParent = parent;
+                parent = node;
+                var containerFlags = getContainerFlags(node);
+                if (containerFlags === 0 /* None */) {
+                    bindChildren(node);
+                }
+                else {
+                    bindContainer(node, containerFlags);
+                }
+                parent = saveParent;
+            }
+            else if (!skipTransformFlagAggregation && (node.transformFlags & 536870912 /* HasComputedFlags */) === 0) {
+                subtreeTransformFlags |= computeTransformFlagsForNode(node, 0);
+                bindJSDoc(node);
+            }
+            inStrictMode = saveInStrictMode;
+        }
+        function bindJSDoc(node) {
+            if (ts.hasJSDocNodes(node)) {
+                if (ts.isInJavaScriptFile(node)) {
+                    for (var _i = 0, _a = node.jsDoc; _i < _a.length; _i++) {
+                        var j = _a[_i];
+                        bind(j);
+                    }
+                }
+                else {
+                    for (var _b = 0, _c = node.jsDoc; _b < _c.length; _b++) {
+                        var j = _c[_b];
+                        setParentPointers(node, j);
+                    }
+                }
+            }
+        }
+        function updateStrictModeStatementList(statements) {
+            if (!inStrictMode) {
+                for (var _i = 0, statements_1 = statements; _i < statements_1.length; _i++) {
+                    var statement = statements_1[_i];
+                    if (!ts.isPrologueDirective(statement)) {
+                        return;
+                    }
+                    if (isUseStrictPrologueDirective(statement)) {
+                        inStrictMode = true;
+                        return;
+                    }
+                }
+            }
+        }
+        /// Should be called only on prologue directives (isPrologueDirective(node) should be true)
+        function isUseStrictPrologueDirective(node) {
+            var nodeText = ts.getSourceTextOfNodeFromSourceFile(file, node.expression);
+            // Note: the node text must be exactly "use strict" or 'use strict'.  It is not ok for the
+            // string to contain unicode escapes (as per ES5).
+            return nodeText === '"use strict"' || nodeText === "'use strict'";
+        }
+        function bindWorker(node) {
+            switch (node.kind) {
+                /* Strict mode checks */
+                case 71 /* Identifier */:
+                    // for typedef type names with namespaces, bind the new jsdoc type symbol here
+                    // because it requires all containing namespaces to be in effect, namely the
+                    // current "blockScopeContainer" needs to be set to its immediate namespace parent.
+                    if (node.isInJSDocNamespace) {
+                        var parentNode = node.parent;
+                        while (parentNode && !ts.isJSDocTypeAlias(parentNode)) {
+                            parentNode = parentNode.parent;
+                        }
+                        bindBlockScopedDeclaration(parentNode, 524288 /* TypeAlias */, 67901928 /* TypeAliasExcludes */);
+                        break;
+                    }
+                // falls through
+                case 99 /* ThisKeyword */:
+                    if (currentFlow && (ts.isExpression(node) || parent.kind === 271 /* ShorthandPropertyAssignment */)) {
+                        node.flowNode = currentFlow;
+                    }
+                    return checkStrictModeIdentifier(node);
+                case 185 /* PropertyAccessExpression */:
+                    if (currentFlow && isNarrowableReference(node)) {
+                        node.flowNode = currentFlow;
+                    }
+                    if (ts.isSpecialPropertyDeclaration(node)) {
+                        bindSpecialPropertyDeclaration(node);
+                    }
+                    break;
+                case 200 /* BinaryExpression */:
+                    var specialKind = ts.getSpecialPropertyAssignmentKind(node);
+                    switch (specialKind) {
+                        case 1 /* ExportsProperty */:
+                            bindExportsPropertyAssignment(node);
+                            break;
+                        case 2 /* ModuleExports */:
+                            bindModuleExportsAssignment(node);
+                            break;
+                        case 3 /* PrototypeProperty */:
+                            bindPrototypePropertyAssignment(node.left, node);
+                            break;
+                        case 6 /* Prototype */:
+                            bindPrototypeAssignment(node);
+                            break;
+                        case 4 /* ThisProperty */:
+                            bindThisPropertyAssignment(node);
+                            break;
+                        case 5 /* Property */:
+                            bindSpecialPropertyAssignment(node);
+                            break;
+                        case 0 /* None */:
+                            // Nothing to do
+                            break;
+                        default:
+                            ts.Debug.fail("Unknown special property assignment kind");
+                    }
+                    return checkStrictModeBinaryExpression(node);
+                case 269 /* CatchClause */:
+                    return checkStrictModeCatchClause(node);
+                case 194 /* DeleteExpression */:
+                    return checkStrictModeDeleteExpression(node);
+                case 8 /* NumericLiteral */:
+                    return checkStrictModeNumericLiteral(node);
+                case 199 /* PostfixUnaryExpression */:
+                    return checkStrictModePostfixUnaryExpression(node);
+                case 198 /* PrefixUnaryExpression */:
+                    return checkStrictModePrefixUnaryExpression(node);
+                case 226 /* WithStatement */:
+                    return checkStrictModeWithStatement(node);
+                case 174 /* ThisType */:
+                    seenThisKeyword = true;
+                    return;
+                case 161 /* TypePredicate */:
+                    break; // Binding the children will handle everything
+                case 148 /* TypeParameter */:
+                    return bindTypeParameter(node);
+                case 149 /* Parameter */:
+                    return bindParameter(node);
+                case 232 /* VariableDeclaration */:
+                    return bindVariableDeclarationOrBindingElement(node);
+                case 182 /* BindingElement */:
+                    node.flowNode = currentFlow;
+                    return bindVariableDeclarationOrBindingElement(node);
+                case 152 /* PropertyDeclaration */:
+                case 151 /* PropertySignature */:
+                    return bindPropertyWorker(node);
+                case 270 /* PropertyAssignment */:
+                case 271 /* ShorthandPropertyAssignment */:
+                    return bindPropertyOrMethodOrAccessor(node, 4 /* Property */, 0 /* PropertyExcludes */);
+                case 273 /* EnumMember */:
+                    return bindPropertyOrMethodOrAccessor(node, 8 /* EnumMember */, 68008959 /* EnumMemberExcludes */);
+                case 158 /* CallSignature */:
+                case 159 /* ConstructSignature */:
+                case 160 /* IndexSignature */:
+                    return declareSymbolAndAddToSymbolTable(node, 131072 /* Signature */, 0 /* None */);
+                case 154 /* MethodDeclaration */:
+                case 153 /* MethodSignature */:
+                    // If this is an ObjectLiteralExpression method, then it sits in the same space
+                    // as other properties in the object literal.  So we use SymbolFlags.PropertyExcludes
+                    // so that it will conflict with any other object literal members with the same
+                    // name.
+                    return bindPropertyOrMethodOrAccessor(node, 8192 /* Method */ | (node.questionToken ? 16777216 /* Optional */ : 0 /* None */), ts.isObjectLiteralMethod(node) ? 0 /* PropertyExcludes */ : 67208127 /* MethodExcludes */);
+                case 234 /* FunctionDeclaration */:
+                    return bindFunctionDeclaration(node);
+                case 155 /* Constructor */:
+                    return declareSymbolAndAddToSymbolTable(node, 16384 /* Constructor */, /*symbolExcludes:*/ 0 /* None */);
+                case 156 /* GetAccessor */:
+                    return bindPropertyOrMethodOrAccessor(node, 32768 /* GetAccessor */, 67150783 /* GetAccessorExcludes */);
+                case 157 /* SetAccessor */:
+                    return bindPropertyOrMethodOrAccessor(node, 65536 /* SetAccessor */, 67183551 /* SetAccessorExcludes */);
+                case 163 /* FunctionType */:
+                case 284 /* JSDocFunctionType */:
+                case 288 /* JSDocSignature */:
+                case 164 /* ConstructorType */:
+                    return bindFunctionOrConstructorType(node);
+                case 166 /* TypeLiteral */:
+                case 287 /* JSDocTypeLiteral */:
+                case 177 /* MappedType */:
+                    return bindAnonymousTypeWorker(node);
+                case 184 /* ObjectLiteralExpression */:
+                    return bindObjectLiteralExpression(node);
+                case 192 /* FunctionExpression */:
+                case 193 /* ArrowFunction */:
+                    return bindFunctionExpression(node);
+                case 187 /* CallExpression */:
+                    if (ts.isInJavaScriptFile(node)) {
+                        bindCallExpression(node);
+                    }
+                    break;
+                // Members of classes, interfaces, and modules
+                case 205 /* ClassExpression */:
+                case 235 /* ClassDeclaration */:
+                    // All classes are automatically in strict mode in ES6.
+                    inStrictMode = true;
+                    return bindClassLikeDeclaration(node);
+                case 236 /* InterfaceDeclaration */:
+                    return bindBlockScopedDeclaration(node, 64 /* Interface */, 67901832 /* InterfaceExcludes */);
+                case 237 /* TypeAliasDeclaration */:
+                    return bindBlockScopedDeclaration(node, 524288 /* TypeAlias */, 67901928 /* TypeAliasExcludes */);
+                case 238 /* EnumDeclaration */:
+                    return bindEnumDeclaration(node);
+                case 239 /* ModuleDeclaration */:
+                    return bindModuleDeclaration(node);
+                // Jsx-attributes
+                case 263 /* JsxAttributes */:
+                    return bindJsxAttributes(node);
+                case 262 /* JsxAttribute */:
+                    return bindJsxAttribute(node, 4 /* Property */, 0 /* PropertyExcludes */);
+                // Imports and exports
+                case 243 /* ImportEqualsDeclaration */:
+                case 246 /* NamespaceImport */:
+                case 248 /* ImportSpecifier */:
+                case 252 /* ExportSpecifier */:
+                    return declareSymbolAndAddToSymbolTable(node, 2097152 /* Alias */, 2097152 /* AliasExcludes */);
+                case 242 /* NamespaceExportDeclaration */:
+                    return bindNamespaceExportDeclaration(node);
+                case 245 /* ImportClause */:
+                    return bindImportClause(node);
+                case 250 /* ExportDeclaration */:
+                    return bindExportDeclaration(node);
+                case 249 /* ExportAssignment */:
+                    return bindExportAssignment(node);
+                case 274 /* SourceFile */:
+                    updateStrictModeStatementList(node.statements);
+                    return bindSourceFileIfExternalModule();
+                case 213 /* Block */:
+                    if (!ts.isFunctionLike(node.parent)) {
+                        return;
+                    }
+                // falls through
+                case 240 /* ModuleBlock */:
+                    return updateStrictModeStatementList(node.statements);
+                case 293 /* JSDocParameterTag */:
+                    if (node.parent.kind === 288 /* JSDocSignature */) {
+                        return bindParameter(node);
+                    }
+                    if (node.parent.kind !== 287 /* JSDocTypeLiteral */) {
+                        break;
+                    }
+                // falls through
+                case 298 /* JSDocPropertyTag */:
+                    var propTag = node;
+                    var flags = propTag.isBracketed || propTag.typeExpression && propTag.typeExpression.type.kind === 283 /* JSDocOptionalType */ ?
+                        4 /* Property */ | 16777216 /* Optional */ :
+                        4 /* Property */;
+                    return declareSymbolAndAddToSymbolTable(propTag, flags, 0 /* PropertyExcludes */);
+                case 297 /* JSDocTypedefTag */:
+                case 292 /* JSDocCallbackTag */:
+                    return (delayedTypeAliases || (delayedTypeAliases = [])).push(node);
+            }
+        }
+        function bindPropertyWorker(node) {
+            return bindPropertyOrMethodOrAccessor(node, 4 /* Property */ | (node.questionToken ? 16777216 /* Optional */ : 0 /* None */), 0 /* PropertyExcludes */);
+        }
+        function bindAnonymousTypeWorker(node) {
+            return bindAnonymousDeclaration(node, 2048 /* TypeLiteral */, "__type" /* Type */);
+        }
+        function bindSourceFileIfExternalModule() {
+            setExportContextFlag(file);
+            if (ts.isExternalModule(file)) {
+                bindSourceFileAsExternalModule();
+            }
+            else if (ts.isJsonSourceFile(file)) {
+                bindSourceFileAsExternalModule();
+                // Create symbol equivalent for the module.exports = {}
+                var originalSymbol = file.symbol;
+                declareSymbol(file.symbol.exports, file.symbol, file, 4 /* Property */, 67108863 /* All */);
+                file.symbol = originalSymbol;
+            }
+        }
+        function bindSourceFileAsExternalModule() {
+            bindAnonymousDeclaration(file, 512 /* ValueModule */, "\"" + ts.removeFileExtension(file.fileName) + "\"");
+        }
+        function bindExportAssignment(node) {
+            if (!container.symbol || !container.symbol.exports) {
+                // Export assignment in some sort of block construct
+                bindAnonymousDeclaration(node, 2097152 /* Alias */, getDeclarationName(node));
+            }
+            else {
+                var flags = node.kind === 249 /* ExportAssignment */ && ts.exportAssignmentIsAlias(node)
+                    // An export default clause with an EntityNameExpression or a class expression exports all meanings of that identifier or expression;
+                    ? 2097152 /* Alias */
+                    // An export default clause with any other expression exports a value
+                    : 4 /* Property */;
+                // If there is an `export default x;` alias declaration, can't `export default` anything else.
+                // (In contrast, you can still have `export default function f() {}` and `export default interface I {}`.)
+                declareSymbol(container.symbol.exports, container.symbol, node, flags, 67108863 /* All */);
+            }
+        }
+        function bindNamespaceExportDeclaration(node) {
+            if (node.modifiers && node.modifiers.length) {
+                file.bindDiagnostics.push(createDiagnosticForNode(node, ts.Diagnostics.Modifiers_cannot_appear_here));
+            }
+            if (node.parent.kind !== 274 /* SourceFile */) {
+                file.bindDiagnostics.push(createDiagnosticForNode(node, ts.Diagnostics.Global_module_exports_may_only_appear_at_top_level));
+                return;
+            }
+            else {
+                var parent_1 = node.parent;
+                if (!ts.isExternalModule(parent_1)) {
+                    file.bindDiagnostics.push(createDiagnosticForNode(node, ts.Diagnostics.Global_module_exports_may_only_appear_in_module_files));
+                    return;
+                }
+                if (!parent_1.isDeclarationFile) {
+                    file.bindDiagnostics.push(createDiagnosticForNode(node, ts.Diagnostics.Global_module_exports_may_only_appear_in_declaration_files));
+                    return;
+                }
+            }
+            file.symbol.globalExports = file.symbol.globalExports || ts.createSymbolTable();
+            declareSymbol(file.symbol.globalExports, file.symbol, node, 2097152 /* Alias */, 2097152 /* AliasExcludes */);
+        }
+        function bindExportDeclaration(node) {
+            if (!container.symbol || !container.symbol.exports) {
+                // Export * in some sort of block construct
+                bindAnonymousDeclaration(node, 8388608 /* ExportStar */, getDeclarationName(node));
+            }
+            else if (!node.exportClause) {
+                // All export * declarations are collected in an __export symbol
+                declareSymbol(container.symbol.exports, container.symbol, node, 8388608 /* ExportStar */, 0 /* None */);
+            }
+        }
+        function bindImportClause(node) {
+            if (node.name) {
+                declareSymbolAndAddToSymbolTable(node, 2097152 /* Alias */, 2097152 /* AliasExcludes */);
+            }
+        }
+        function setCommonJsModuleIndicator(node) {
+            if (!file.commonJsModuleIndicator) {
+                file.commonJsModuleIndicator = node;
+                if (!file.externalModuleIndicator) {
+                    bindSourceFileAsExternalModule();
+                }
+            }
+        }
+        function bindExportsPropertyAssignment(node) {
+            // When we create a property via 'exports.foo = bar', the 'exports.foo' property access
+            // expression is the declaration
+            setCommonJsModuleIndicator(node);
+            var lhs = node.left;
+            var symbol = forEachIdentifierInEntityName(lhs.expression, /*parent*/ undefined, function (id, symbol) {
+                if (symbol) {
+                    addDeclarationToSymbol(symbol, id, 1536 /* Module */ | 67108864 /* JSContainer */);
+                }
+                return symbol;
+            });
+            if (symbol) {
+                var flags = ts.isClassExpression(node.right) ?
+                    4 /* Property */ | 1048576 /* ExportValue */ | 32 /* Class */ :
+                    4 /* Property */ | 1048576 /* ExportValue */;
+                declareSymbol(symbol.exports, symbol, lhs, flags, 0 /* None */);
+            }
+        }
+        function bindModuleExportsAssignment(node) {
+            // A common practice in node modules is to set 'export = module.exports = {}', this ensures that 'exports'
+            // is still pointing to 'module.exports'.
+            // We do not want to consider this as 'export=' since a module can have only one of these.
+            // Similarly we do not want to treat 'module.exports = exports' as an 'export='.
+            var assignedExpression = ts.getRightMostAssignedExpression(node.right);
+            if (ts.isEmptyObjectLiteral(assignedExpression) || container === file && isExportsOrModuleExportsOrAlias(file, assignedExpression)) {
+                // Mark it as a module in case there are no other exports in the file
+                setCommonJsModuleIndicator(node);
+                return;
+            }
+            // 'module.exports = expr' assignment
+            setCommonJsModuleIndicator(node);
+            var flags = ts.exportAssignmentIsAlias(node)
+                ? 2097152 /* Alias */
+                : 4 /* Property */ | 1048576 /* ExportValue */ | 512 /* ValueModule */;
+            declareSymbol(file.symbol.exports, file.symbol, node, flags, 0 /* None */);
+        }
+        function bindThisPropertyAssignment(node) {
+            ts.Debug.assert(ts.isInJavaScriptFile(node));
+            var thisContainer = ts.getThisContainer(node, /*includeArrowFunctions*/ false);
+            switch (thisContainer.kind) {
+                case 234 /* FunctionDeclaration */:
+                case 192 /* FunctionExpression */:
+                    var constructorSymbol = thisContainer.symbol;
+                    // For `f.prototype.m = function() { this.x = 0; }`, `this.x = 0` should modify `f`'s members, not the function expression.
+                    if (ts.isBinaryExpression(thisContainer.parent) && thisContainer.parent.operatorToken.kind === 58 /* EqualsToken */) {
+                        var l = thisContainer.parent.left;
+                        if (ts.isPropertyAccessEntityNameExpression(l) && ts.isPrototypeAccess(l.expression)) {
+                            constructorSymbol = lookupSymbolForPropertyAccess(l.expression.expression, thisParentContainer);
+                        }
+                    }
+                    if (constructorSymbol) {
+                        // Declare a 'member' if the container is an ES5 class or ES6 constructor
+                        constructorSymbol.members = constructorSymbol.members || ts.createSymbolTable();
+                        // It's acceptable for multiple 'this' assignments of the same identifier to occur
+                        declareSymbol(constructorSymbol.members, constructorSymbol, node, 4 /* Property */, 0 /* PropertyExcludes */ & ~4 /* Property */);
+                    }
+                    break;
+                case 155 /* Constructor */:
+                case 152 /* PropertyDeclaration */:
+                case 154 /* MethodDeclaration */:
+                case 156 /* GetAccessor */:
+                case 157 /* SetAccessor */:
+                    // this.foo assignment in a JavaScript class
+                    // Bind this property to the containing class
+                    var containingClass = thisContainer.parent;
+                    var symbolTable = ts.hasModifier(thisContainer, 32 /* Static */) ? containingClass.symbol.exports : containingClass.symbol.members;
+                    declareSymbol(symbolTable, containingClass.symbol, node, 4 /* Property */, 0 /* None */, /*isReplaceableByMethod*/ true);
+                    break;
+                case 274 /* SourceFile */:
+                    // this.foo assignment in a source file
+                    // Do not bind. It would be nice to support this someday though.
+                    break;
+                default:
+                    ts.Debug.fail(ts.Debug.showSyntaxKind(thisContainer));
+            }
+        }
+        function bindSpecialPropertyDeclaration(node) {
+            if (node.expression.kind === 99 /* ThisKeyword */) {
+                bindThisPropertyAssignment(node);
+            }
+            else if (ts.isPropertyAccessEntityNameExpression(node) && node.parent.parent.kind === 274 /* SourceFile */) {
+                if (ts.isPrototypeAccess(node.expression)) {
+                    bindPrototypePropertyAssignment(node, node.parent);
+                }
+                else {
+                    bindStaticPropertyAssignment(node);
+                }
+            }
+        }
+        /** For `x.prototype = { p, ... }`, declare members p,... if `x` is function/class/{}, or not declared. */
+        function bindPrototypeAssignment(node) {
+            node.left.parent = node;
+            node.right.parent = node;
+            var lhs = node.left;
+            bindPropertyAssignment(lhs, lhs, /*isPrototypeProperty*/ false);
+        }
+        /**
+         * For `x.prototype.y = z`, declare a member `y` on `x` if `x` is a function or class, or not declared.
+         * Note that jsdoc preceding an ExpressionStatement like `x.prototype.y;` is also treated as a declaration.
+         */
+        function bindPrototypePropertyAssignment(lhs, parent) {
+            // Look up the function in the local scope, since prototype assignments should
+            // follow the function declaration
+            var classPrototype = lhs.expression;
+            var constructorFunction = classPrototype.expression;
+            // Fix up parent pointers since we're going to use these nodes before we bind into them
+            lhs.parent = parent;
+            constructorFunction.parent = classPrototype;
+            classPrototype.parent = lhs;
+            bindPropertyAssignment(constructorFunction, lhs, /*isPrototypeProperty*/ true);
+        }
+        function bindSpecialPropertyAssignment(node) {
+            var lhs = node.left;
+            // Fix up parent pointers since we're going to use these nodes before we bind into them
+            node.left.parent = node;
+            node.right.parent = node;
+            if (ts.isIdentifier(lhs.expression) && container === file && isNameOfExportsOrModuleExportsAliasDeclaration(file, lhs.expression)) {
+                // This can be an alias for the 'exports' or 'module.exports' names, e.g.
+                //    var util = module.exports;
+                //    util.property = function ...
+                bindExportsPropertyAssignment(node);
+            }
+            else {
+                bindStaticPropertyAssignment(lhs);
+            }
+        }
+        /**
+         * For nodes like `x.y = z`, declare a member 'y' on 'x' if x is a function (or IIFE) or class or {}, or not declared.
+         * Also works for expression statements preceded by JSDoc, like / ** @type number * / x.y;
+         */
+        function bindStaticPropertyAssignment(node) {
+            node.expression.parent = node;
+            bindPropertyAssignment(node.expression, node, /*isPrototypeProperty*/ false);
+        }
+        function bindPropertyAssignment(name, propertyAccess, isPrototypeProperty) {
+            var namespaceSymbol = lookupSymbolForPropertyAccess(name);
+            var isToplevelNamespaceableInitializer = ts.isBinaryExpression(propertyAccess.parent)
+                ? getParentOfBinaryExpression(propertyAccess.parent).parent.kind === 274 /* SourceFile */ &&
+                    !!ts.getJavascriptInitializer(ts.getInitializerOfBinaryExpression(propertyAccess.parent), ts.isPrototypeAccess(propertyAccess.parent.left))
+                : propertyAccess.parent.parent.kind === 274 /* SourceFile */;
+            if (!isPrototypeProperty && (!namespaceSymbol || !(namespaceSymbol.flags & 1920 /* Namespace */)) && isToplevelNamespaceableInitializer) {
+                // make symbols or add declarations for intermediate containers
+                var flags_1 = 1536 /* Module */ | 67108864 /* JSContainer */;
+                var excludeFlags_1 = 67215503 /* ValueModuleExcludes */ & ~67108864 /* JSContainer */;
+                namespaceSymbol = forEachIdentifierInEntityName(propertyAccess.expression, namespaceSymbol, function (id, symbol, parent) {
+                    if (symbol) {
+                        addDeclarationToSymbol(symbol, id, flags_1);
+                        return symbol;
+                    }
+                    else {
+                        return declareSymbol(parent ? parent.exports : container.locals, parent, id, flags_1, excludeFlags_1);
+                    }
+                });
+            }
+            if (!namespaceSymbol || !isJavascriptContainer(namespaceSymbol)) {
+                return;
+            }
+            // Set up the members collection if it doesn't exist already
+            var symbolTable = isPrototypeProperty ?
+                (namespaceSymbol.members || (namespaceSymbol.members = ts.createSymbolTable())) :
+                (namespaceSymbol.exports || (namespaceSymbol.exports = ts.createSymbolTable()));
+            // Declare the method/property
+            var jsContainerFlag = isToplevelNamespaceableInitializer ? 67108864 /* JSContainer */ : 0;
+            var isMethod = ts.isFunctionLikeDeclaration(ts.getAssignedJavascriptInitializer(propertyAccess));
+            var symbolFlags = (isMethod ? 8192 /* Method */ : 4 /* Property */) | jsContainerFlag;
+            var symbolExcludes = (isMethod ? 67208127 /* MethodExcludes */ : 0 /* PropertyExcludes */) & ~jsContainerFlag;
+            declareSymbol(symbolTable, namespaceSymbol, propertyAccess, symbolFlags, symbolExcludes);
+        }
+        /**
+         * Javascript containers are:
+         * - Functions
+         * - classes
+         * - namespaces
+         * - variables initialized with function expressions
+         * -                       with class expressions
+         * -                       with empty object literals
+         * -                       with non-empty object literals if assigned to the prototype property
+         */
+        function isJavascriptContainer(symbol) {
+            if (symbol.flags & (16 /* Function */ | 32 /* Class */ | 1024 /* NamespaceModule */)) {
+                return true;
+            }
+            var node = symbol.valueDeclaration;
+            var init = !node ? undefined :
+                ts.isVariableDeclaration(node) ? node.initializer :
+                    ts.isBinaryExpression(node) ? node.right :
+                        ts.isPropertyAccessExpression(node) && ts.isBinaryExpression(node.parent) ? node.parent.right :
+                            undefined;
+            if (init) {
+                var isPrototypeAssignment = ts.isPrototypeAccess(ts.isVariableDeclaration(node) ? node.name : ts.isBinaryExpression(node) ? node.left : node);
+                return !!ts.getJavascriptInitializer(ts.isBinaryExpression(init) && init.operatorToken.kind === 54 /* BarBarToken */ ? init.right : init, isPrototypeAssignment);
+            }
+            return false;
+        }
+        function getParentOfBinaryExpression(expr) {
+            while (ts.isBinaryExpression(expr.parent)) {
+                expr = expr.parent;
+            }
+            return expr.parent;
+        }
+        function lookupSymbolForPropertyAccess(node, lookupContainer) {
+            if (lookupContainer === void 0) { lookupContainer = container; }
+            if (ts.isIdentifier(node)) {
+                return lookupSymbolForNameWorker(lookupContainer, node.escapedText);
+            }
+            else {
+                var symbol = lookupSymbolForPropertyAccess(node.expression);
+                return symbol && symbol.exports && symbol.exports.get(node.name.escapedText);
+            }
+        }
+        function forEachIdentifierInEntityName(e, parent, action) {
+            if (isExportsOrModuleExportsOrAlias(file, e)) {
+                return file.symbol;
+            }
+            else if (ts.isIdentifier(e)) {
+                return action(e, lookupSymbolForPropertyAccess(e), parent);
+            }
+            else {
+                var s = forEachIdentifierInEntityName(e.expression, parent, action);
+                if (!s || !s.exports)
+                    return ts.Debug.fail();
+                return action(e.name, s.exports.get(e.name.escapedText), s);
+            }
+        }
+        function bindCallExpression(node) {
+            // We're only inspecting call expressions to detect CommonJS modules, so we can skip
+            // this check if we've already seen the module indicator
+            if (!file.commonJsModuleIndicator && ts.isRequireCall(node, /*checkArgumentIsStringLiteralLike*/ false)) {
+                setCommonJsModuleIndicator(node);
+            }
+        }
+        function bindClassLikeDeclaration(node) {
+            if (node.kind === 235 /* ClassDeclaration */) {
+                bindBlockScopedDeclaration(node, 32 /* Class */, 68008383 /* ClassExcludes */);
+            }
+            else {
+                var bindingName = node.name ? node.name.escapedText : "__class" /* Class */;
+                bindAnonymousDeclaration(node, 32 /* Class */, bindingName);
+                // Add name of class expression into the map for semantic classifier
+                if (node.name) {
+                    classifiableNames.set(node.name.escapedText, true);
+                }
+            }
+            var symbol = node.symbol;
+            // TypeScript 1.0 spec (April 2014): 8.4
+            // Every class automatically contains a static property member named 'prototype', the
+            // type of which is an instantiation of the class type with type Any supplied as a type
+            // argument for each type parameter. It is an error to explicitly declare a static
+            // property member with the name 'prototype'.
+            //
+            // Note: we check for this here because this class may be merging into a module.  The
+            // module might have an exported variable called 'prototype'.  We can't allow that as
+            // that would clash with the built-in 'prototype' for the class.
+            var prototypeSymbol = createSymbol(4 /* Property */ | 4194304 /* Prototype */, "prototype");
+            var symbolExport = symbol.exports.get(prototypeSymbol.escapedName);
+            if (symbolExport) {
+                if (node.name) {
+                    node.name.parent = node;
+                }
+                file.bindDiagnostics.push(createDiagnosticForNode(symbolExport.declarations[0], ts.Diagnostics.Duplicate_identifier_0, ts.symbolName(prototypeSymbol)));
+            }
+            symbol.exports.set(prototypeSymbol.escapedName, prototypeSymbol);
+            prototypeSymbol.parent = symbol;
+        }
+        function bindEnumDeclaration(node) {
+            return ts.isConst(node)
+                ? bindBlockScopedDeclaration(node, 128 /* ConstEnum */, 68008831 /* ConstEnumExcludes */)
+                : bindBlockScopedDeclaration(node, 256 /* RegularEnum */, 68008191 /* RegularEnumExcludes */);
+        }
+        function bindVariableDeclarationOrBindingElement(node) {
+            if (inStrictMode) {
+                checkStrictModeEvalOrArguments(node, node.name);
+            }
+            if (!ts.isBindingPattern(node.name)) {
+                if (ts.isBlockOrCatchScoped(node)) {
+                    bindBlockScopedVariableDeclaration(node);
+                }
+                else if (ts.isParameterDeclaration(node)) {
+                    // It is safe to walk up parent chain to find whether the node is a destructuring parameter declaration
+                    // because its parent chain has already been set up, since parents are set before descending into children.
+                    //
+                    // If node is a binding element in parameter declaration, we need to use ParameterExcludes.
+                    // Using ParameterExcludes flag allows the compiler to report an error on duplicate identifiers in Parameter Declaration
+                    // For example:
+                    //      function foo([a,a]) {} // Duplicate Identifier error
+                    //      function bar(a,a) {}   // Duplicate Identifier error, parameter declaration in this case is handled in bindParameter
+                    //                             // which correctly set excluded symbols
+                    declareSymbolAndAddToSymbolTable(node, 1 /* FunctionScopedVariable */, 67216319 /* ParameterExcludes */);
+                }
+                else {
+                    declareSymbolAndAddToSymbolTable(node, 1 /* FunctionScopedVariable */, 67216318 /* FunctionScopedVariableExcludes */);
+                }
+            }
+        }
+        function bindParameter(node) {
+            if (node.kind === 293 /* JSDocParameterTag */ && container.kind !== 288 /* JSDocSignature */) {
+                return;
+            }
+            if (inStrictMode && !(node.flags & 4194304 /* Ambient */)) {
+                // It is a SyntaxError if the identifier eval or arguments appears within a FormalParameterList of a
+                // strict mode FunctionLikeDeclaration or FunctionExpression(13.1)
+                checkStrictModeEvalOrArguments(node, node.name);
+            }
+            if (ts.isBindingPattern(node.name)) {
+                bindAnonymousDeclaration(node, 1 /* FunctionScopedVariable */, "__" + node.parent.parameters.indexOf(node));
+            }
+            else {
+                declareSymbolAndAddToSymbolTable(node, 1 /* FunctionScopedVariable */, 67216319 /* ParameterExcludes */);
+            }
+            // If this is a property-parameter, then also declare the property symbol into the
+            // containing class.
+            if (ts.isParameterPropertyDeclaration(node)) {
+                var classDeclaration = node.parent.parent;
+                declareSymbol(classDeclaration.symbol.members, classDeclaration.symbol, node, 4 /* Property */ | (node.questionToken ? 16777216 /* Optional */ : 0 /* None */), 0 /* PropertyExcludes */);
+            }
+        }
+        function bindFunctionDeclaration(node) {
+            if (!file.isDeclarationFile && !(node.flags & 4194304 /* Ambient */)) {
+                if (ts.isAsyncFunction(node)) {
+                    emitFlags |= 1024 /* HasAsyncFunctions */;
+                }
+            }
+            checkStrictModeFunctionName(node);
+            if (inStrictMode) {
+                checkStrictModeFunctionDeclaration(node);
+                bindBlockScopedDeclaration(node, 16 /* Function */, 67215791 /* FunctionExcludes */);
+            }
+            else {
+                declareSymbolAndAddToSymbolTable(node, 16 /* Function */, 67215791 /* FunctionExcludes */);
+            }
+        }
+        function bindFunctionExpression(node) {
+            if (!file.isDeclarationFile && !(node.flags & 4194304 /* Ambient */)) {
+                if (ts.isAsyncFunction(node)) {
+                    emitFlags |= 1024 /* HasAsyncFunctions */;
+                }
+            }
+            if (currentFlow) {
+                node.flowNode = currentFlow;
+            }
+            checkStrictModeFunctionName(node);
+            var bindingName = node.name ? node.name.escapedText : "__function" /* Function */;
+            return bindAnonymousDeclaration(node, 16 /* Function */, bindingName);
+        }
+        function bindPropertyOrMethodOrAccessor(node, symbolFlags, symbolExcludes) {
+            if (!file.isDeclarationFile && !(node.flags & 4194304 /* Ambient */) && ts.isAsyncFunction(node)) {
+                emitFlags |= 1024 /* HasAsyncFunctions */;
+            }
+            if (currentFlow && ts.isObjectLiteralOrClassExpressionMethod(node)) {
+                node.flowNode = currentFlow;
+            }
+            return ts.hasDynamicName(node)
+                ? bindAnonymousDeclaration(node, symbolFlags, "__computed" /* Computed */)
+                : declareSymbolAndAddToSymbolTable(node, symbolFlags, symbolExcludes);
+        }
+        function getInferTypeContainer(node) {
+            var extendsType = ts.findAncestor(node, function (n) { return n.parent && ts.isConditionalTypeNode(n.parent) && n.parent.extendsType === n; });
+            return extendsType && extendsType.parent;
+        }
+        function bindTypeParameter(node) {
+            if (ts.isJSDocTemplateTag(node.parent)) {
+                var container_1 = ts.find(node.parent.parent.tags, ts.isJSDocTypeAlias) || ts.getHostSignatureFromJSDoc(node.parent); // TODO: GH#18217
+                if (container_1) {
+                    if (!container_1.locals) {
+                        container_1.locals = ts.createSymbolTable();
+                    }
+                    declareSymbol(container_1.locals, /*parent*/ undefined, node, 262144 /* TypeParameter */, 67639784 /* TypeParameterExcludes */);
+                }
+                else {
+                    declareSymbolAndAddToSymbolTable(node, 262144 /* TypeParameter */, 67639784 /* TypeParameterExcludes */);
+                }
+            }
+            else if (node.parent.kind === 172 /* InferType */) {
+                var container_2 = getInferTypeContainer(node.parent);
+                if (container_2) {
+                    if (!container_2.locals) {
+                        container_2.locals = ts.createSymbolTable();
+                    }
+                    declareSymbol(container_2.locals, /*parent*/ undefined, node, 262144 /* TypeParameter */, 67639784 /* TypeParameterExcludes */);
+                }
+                else {
+                    bindAnonymousDeclaration(node, 262144 /* TypeParameter */, getDeclarationName(node)); // TODO: GH#18217
+                }
+            }
+            else {
+                declareSymbolAndAddToSymbolTable(node, 262144 /* TypeParameter */, 67639784 /* TypeParameterExcludes */);
+            }
+        }
+        // reachability checks
+        function shouldReportErrorOnModuleDeclaration(node) {
+            var instanceState = getModuleInstanceState(node);
+            return instanceState === 1 /* Instantiated */ || (instanceState === 2 /* ConstEnumOnly */ && !!options.preserveConstEnums);
+        }
+        function checkUnreachable(node) {
+            if (!(currentFlow.flags & 1 /* Unreachable */)) {
+                return false;
+            }
+            if (currentFlow === unreachableFlow) {
+                var reportError = 
+                // report error on all statements except empty ones
+                (ts.isStatementButNotDeclaration(node) && node.kind !== 215 /* EmptyStatement */) ||
+                    // report error on class declarations
+                    node.kind === 235 /* ClassDeclaration */ ||
+                    // report error on instantiated modules or const-enums only modules if preserveConstEnums is set
+                    (node.kind === 239 /* ModuleDeclaration */ && shouldReportErrorOnModuleDeclaration(node)) ||
+                    // report error on regular enums and const enums if preserveConstEnums is set
+                    (node.kind === 238 /* EnumDeclaration */ && (!ts.isConstEnumDeclaration(node) || options.preserveConstEnums));
+                if (reportError) {
+                    currentFlow = reportedUnreachableFlow;
+                    if (!options.allowUnreachableCode) {
+                        // unreachable code is reported if
+                        // - user has explicitly asked about it AND
+                        // - statement is in not ambient context (statements in ambient context is already an error
+                        //   so we should not report extras) AND
+                        //   - node is not variable statement OR
+                        //   - node is block scoped variable statement OR
+                        //   - node is not block scoped variable statement and at least one variable declaration has initializer
+                        //   Rationale: we don't want to report errors on non-initialized var's since they are hoisted
+                        //   On the other side we do want to report errors on non-initialized 'lets' because of TDZ
+                        var isError = ts.unreachableCodeIsError(options) &&
+                            !(node.flags & 4194304 /* Ambient */) &&
+                            (!ts.isVariableStatement(node) ||
+                                !!(ts.getCombinedNodeFlags(node.declarationList) & 3 /* BlockScoped */) ||
+                                node.declarationList.declarations.some(function (d) { return !!d.initializer; }));
+                        errorOrSuggestionOnFirstToken(isError, node, ts.Diagnostics.Unreachable_code_detected);
+                    }
+                }
+            }
+            return true;
+        }
+    }
+    /* @internal */
+    function isExportsOrModuleExportsOrAlias(sourceFile, node) {
+        return ts.isExportsIdentifier(node) ||
+            ts.isModuleExportsPropertyAccessExpression(node) ||
+            ts.isIdentifier(node) && isNameOfExportsOrModuleExportsAliasDeclaration(sourceFile, node);
+    }
+    ts.isExportsOrModuleExportsOrAlias = isExportsOrModuleExportsOrAlias;
+    function isNameOfExportsOrModuleExportsAliasDeclaration(sourceFile, node) {
+        var symbol = lookupSymbolForNameWorker(sourceFile, node.escapedText);
+        return !!symbol && !!symbol.valueDeclaration && ts.isVariableDeclaration(symbol.valueDeclaration) &&
+            !!symbol.valueDeclaration.initializer && isExportsOrModuleExportsOrAliasOrAssignment(sourceFile, symbol.valueDeclaration.initializer);
+    }
+    function isExportsOrModuleExportsOrAliasOrAssignment(sourceFile, node) {
+        return isExportsOrModuleExportsOrAlias(sourceFile, node) ||
+            (ts.isAssignmentExpression(node, /*excludeCompoundAssignment*/ true) && (isExportsOrModuleExportsOrAliasOrAssignment(sourceFile, node.left) || isExportsOrModuleExportsOrAliasOrAssignment(sourceFile, node.right)));
+    }
+    function lookupSymbolForNameWorker(container, name) {
+        var local = container.locals && container.locals.get(name);
+        if (local) {
+            return local.exportSymbol || local;
+        }
+        return container.symbol && container.symbol.exports && container.symbol.exports.get(name);
+    }
+    /**
+     * Computes the transform flags for a node, given the transform flags of its subtree
+     *
+     * @param node The node to analyze
+     * @param subtreeFlags Transform flags computed for this node's subtree
+     */
+    function computeTransformFlagsForNode(node, subtreeFlags) {
+        var kind = node.kind;
+        switch (kind) {
+            case 187 /* CallExpression */:
+                return computeCallExpression(node, subtreeFlags);
+            case 188 /* NewExpression */:
+                return computeNewExpression(node, subtreeFlags);
+            case 239 /* ModuleDeclaration */:
+                return computeModuleDeclaration(node, subtreeFlags);
+            case 191 /* ParenthesizedExpression */:
+                return computeParenthesizedExpression(node, subtreeFlags);
+            case 200 /* BinaryExpression */:
+                return computeBinaryExpression(node, subtreeFlags);
+            case 216 /* ExpressionStatement */:
+                return computeExpressionStatement(node, subtreeFlags);
+            case 149 /* Parameter */:
+                return computeParameter(node, subtreeFlags);
+            case 193 /* ArrowFunction */:
+                return computeArrowFunction(node, subtreeFlags);
+            case 192 /* FunctionExpression */:
+                return computeFunctionExpression(node, subtreeFlags);
+            case 234 /* FunctionDeclaration */:
+                return computeFunctionDeclaration(node, subtreeFlags);
+            case 232 /* VariableDeclaration */:
+                return computeVariableDeclaration(node, subtreeFlags);
+            case 233 /* VariableDeclarationList */:
+                return computeVariableDeclarationList(node, subtreeFlags);
+            case 214 /* VariableStatement */:
+                return computeVariableStatement(node, subtreeFlags);
+            case 228 /* LabeledStatement */:
+                return computeLabeledStatement(node, subtreeFlags);
+            case 235 /* ClassDeclaration */:
+                return computeClassDeclaration(node, subtreeFlags);
+            case 205 /* ClassExpression */:
+                return computeClassExpression(node, subtreeFlags);
+            case 268 /* HeritageClause */:
+                return computeHeritageClause(node, subtreeFlags);
+            case 269 /* CatchClause */:
+                return computeCatchClause(node, subtreeFlags);
+            case 207 /* ExpressionWithTypeArguments */:
+                return computeExpressionWithTypeArguments(node, subtreeFlags);
+            case 155 /* Constructor */:
+                return computeConstructor(node, subtreeFlags);
+            case 152 /* PropertyDeclaration */:
+                return computePropertyDeclaration(node, subtreeFlags);
+            case 154 /* MethodDeclaration */:
+                return computeMethod(node, subtreeFlags);
+            case 156 /* GetAccessor */:
+            case 157 /* SetAccessor */:
+                return computeAccessor(node, subtreeFlags);
+            case 243 /* ImportEqualsDeclaration */:
+                return computeImportEquals(node, subtreeFlags);
+            case 185 /* PropertyAccessExpression */:
+                return computePropertyAccess(node, subtreeFlags);
+            case 186 /* ElementAccessExpression */:
+                return computeElementAccess(node, subtreeFlags);
+            default:
+                return computeOther(node, kind, subtreeFlags);
+        }
+    }
+    ts.computeTransformFlagsForNode = computeTransformFlagsForNode;
+    function computeCallExpression(node, subtreeFlags) {
+        var transformFlags = subtreeFlags;
+        var expression = node.expression;
+        if (node.typeArguments) {
+            transformFlags |= 3 /* AssertTypeScript */;
+        }
+        if (subtreeFlags & 524288 /* ContainsSpread */
+            || (expression.transformFlags & (134217728 /* Super */ | 268435456 /* ContainsSuper */))) {
+            // If the this node contains a SpreadExpression, or is a super call, then it is an ES6
+            // node.
+            transformFlags |= 192 /* AssertES2015 */;
+            // super property or element accesses could be inside lambdas, etc, and need a captured `this`,
+            // while super keyword for super calls (indicated by TransformFlags.Super) does not (since it can only be top-level in a constructor)
+            if (expression.transformFlags & 268435456 /* ContainsSuper */) {
+                transformFlags |= 16384 /* ContainsLexicalThis */;
+            }
+        }
+        if (expression.kind === 91 /* ImportKeyword */) {
+            transformFlags |= 67108864 /* ContainsDynamicImport */;
+            // A dynamic 'import()' call that contains a lexical 'this' will
+            // require a captured 'this' when emitting down-level.
+            if (subtreeFlags & 16384 /* ContainsLexicalThis */) {
+                transformFlags |= 32768 /* ContainsCapturedLexicalThis */;
+            }
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~940049729 /* ArrayLiteralOrCallOrNewExcludes */;
+    }
+    function computeNewExpression(node, subtreeFlags) {
+        var transformFlags = subtreeFlags;
+        if (node.typeArguments) {
+            transformFlags |= 3 /* AssertTypeScript */;
+        }
+        if (subtreeFlags & 524288 /* ContainsSpread */) {
+            // If the this node contains a SpreadElementExpression then it is an ES6
+            // node.
+            transformFlags |= 192 /* AssertES2015 */;
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~940049729 /* ArrayLiteralOrCallOrNewExcludes */;
+    }
+    function computeBinaryExpression(node, subtreeFlags) {
+        var transformFlags = subtreeFlags;
+        var operatorTokenKind = node.operatorToken.kind;
+        var leftKind = node.left.kind;
+        if (operatorTokenKind === 58 /* EqualsToken */ && leftKind === 184 /* ObjectLiteralExpression */) {
+            // Destructuring object assignments with are ES2015 syntax
+            // and possibly ESNext if they contain rest
+            transformFlags |= 8 /* AssertESNext */ | 192 /* AssertES2015 */ | 3072 /* AssertDestructuringAssignment */;
+        }
+        else if (operatorTokenKind === 58 /* EqualsToken */ && leftKind === 183 /* ArrayLiteralExpression */) {
+            // Destructuring assignments are ES2015 syntax.
+            transformFlags |= 192 /* AssertES2015 */ | 3072 /* AssertDestructuringAssignment */;
+        }
+        else if (operatorTokenKind === 40 /* AsteriskAsteriskToken */
+            || operatorTokenKind === 62 /* AsteriskAsteriskEqualsToken */) {
+            // Exponentiation is ES2016 syntax.
+            transformFlags |= 32 /* AssertES2016 */;
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~939525441 /* NodeExcludes */;
+    }
+    function computeParameter(node, subtreeFlags) {
+        var transformFlags = subtreeFlags;
+        var name = node.name;
+        var initializer = node.initializer;
+        var dotDotDotToken = node.dotDotDotToken;
+        // The '?' token, type annotations, decorators, and 'this' parameters are TypeSCript
+        // syntax.
+        if (node.questionToken
+            || node.type
+            || subtreeFlags & 4096 /* ContainsDecorators */
+            || ts.isThisIdentifier(name)) {
+            transformFlags |= 3 /* AssertTypeScript */;
+        }
+        // If a parameter has an accessibility modifier, then it is TypeScript syntax.
+        if (ts.hasModifier(node, 92 /* ParameterPropertyModifier */)) {
+            transformFlags |= 3 /* AssertTypeScript */ | 262144 /* ContainsParameterPropertyAssignments */;
+        }
+        // parameters with object rest destructuring are ES Next syntax
+        if (subtreeFlags & 1048576 /* ContainsObjectRest */) {
+            transformFlags |= 8 /* AssertESNext */;
+        }
+        // If a parameter has an initializer, a binding pattern or a dotDotDot token, then
+        // it is ES6 syntax and its container must emit default value assignments or parameter destructuring downlevel.
+        if (subtreeFlags & 8388608 /* ContainsBindingPattern */ || initializer || dotDotDotToken) {
+            transformFlags |= 192 /* AssertES2015 */ | 131072 /* ContainsDefaultValueAssignments */;
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~939525441 /* ParameterExcludes */;
+    }
+    function computeParenthesizedExpression(node, subtreeFlags) {
+        var transformFlags = subtreeFlags;
+        var expression = node.expression;
+        var expressionKind = expression.kind;
+        var expressionTransformFlags = expression.transformFlags;
+        // If the node is synthesized, it means the emitter put the parentheses there,
+        // not the user. If we didn't want them, the emitter would not have put them
+        // there.
+        if (expressionKind === 208 /* AsExpression */
+            || expressionKind === 190 /* TypeAssertionExpression */) {
+            transformFlags |= 3 /* AssertTypeScript */;
+        }
+        // If the expression of a ParenthesizedExpression is a destructuring assignment,
+        // then the ParenthesizedExpression is a destructuring assignment.
+        if (expressionTransformFlags & 1024 /* DestructuringAssignment */) {
+            transformFlags |= 1024 /* DestructuringAssignment */;
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~536872257 /* OuterExpressionExcludes */;
+    }
+    function computeClassDeclaration(node, subtreeFlags) {
+        var transformFlags;
+        if (ts.hasModifier(node, 2 /* Ambient */)) {
+            // An ambient declaration is TypeScript syntax.
+            transformFlags = 3 /* AssertTypeScript */;
+        }
+        else {
+            // A ClassDeclaration is ES6 syntax.
+            transformFlags = subtreeFlags | 192 /* AssertES2015 */;
+            // A class with a parameter property assignment, property initializer, computed property name, or decorator is
+            // TypeScript syntax.
+            // An exported declaration may be TypeScript syntax, but is handled by the visitor
+            // for a namespace declaration.
+            if ((subtreeFlags & 274432 /* TypeScriptClassSyntaxMask */)
+                || node.typeParameters) {
+                transformFlags |= 3 /* AssertTypeScript */;
+            }
+            if (subtreeFlags & 65536 /* ContainsLexicalThisInComputedPropertyName */) {
+                // A computed property name containing `this` might need to be rewritten,
+                // so propagate the ContainsLexicalThis flag upward.
+                transformFlags |= 16384 /* ContainsLexicalThis */;
+            }
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~942011713 /* ClassExcludes */;
+    }
+    function computeClassExpression(node, subtreeFlags) {
+        // A ClassExpression is ES6 syntax.
+        var transformFlags = subtreeFlags | 192 /* AssertES2015 */;
+        // A class with a parameter property assignment, property initializer, or decorator is
+        // TypeScript syntax.
+        if (subtreeFlags & 274432 /* TypeScriptClassSyntaxMask */
+            || node.typeParameters) {
+            transformFlags |= 3 /* AssertTypeScript */;
+        }
+        if (subtreeFlags & 65536 /* ContainsLexicalThisInComputedPropertyName */) {
+            // A computed property name containing `this` might need to be rewritten,
+            // so propagate the ContainsLexicalThis flag upward.
+            transformFlags |= 16384 /* ContainsLexicalThis */;
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~942011713 /* ClassExcludes */;
+    }
+    function computeHeritageClause(node, subtreeFlags) {
+        var transformFlags = subtreeFlags;
+        switch (node.token) {
+            case 85 /* ExtendsKeyword */:
+                // An `extends` HeritageClause is ES6 syntax.
+                transformFlags |= 192 /* AssertES2015 */;
+                break;
+            case 108 /* ImplementsKeyword */:
+                // An `implements` HeritageClause is TypeScript syntax.
+                transformFlags |= 3 /* AssertTypeScript */;
+                break;
+            default:
+                ts.Debug.fail("Unexpected token for heritage clause");
+                break;
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~939525441 /* NodeExcludes */;
+    }
+    function computeCatchClause(node, subtreeFlags) {
+        var transformFlags = subtreeFlags;
+        if (!node.variableDeclaration) {
+            transformFlags |= 8 /* AssertESNext */;
+        }
+        else if (ts.isBindingPattern(node.variableDeclaration.name)) {
+            transformFlags |= 192 /* AssertES2015 */;
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~940574017 /* CatchClauseExcludes */;
+    }
+    function computeExpressionWithTypeArguments(node, subtreeFlags) {
+        // An ExpressionWithTypeArguments is ES6 syntax, as it is used in the
+        // extends clause of a class.
+        var transformFlags = subtreeFlags | 192 /* AssertES2015 */;
+        // If an ExpressionWithTypeArguments contains type arguments, then it
+        // is TypeScript syntax.
+        if (node.typeArguments) {
+            transformFlags |= 3 /* AssertTypeScript */;
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~939525441 /* NodeExcludes */;
+    }
+    function computeConstructor(node, subtreeFlags) {
+        var transformFlags = subtreeFlags;
+        // TypeScript-specific modifiers and overloads are TypeScript syntax
+        if (ts.hasModifier(node, 2270 /* TypeScriptModifier */)
+            || !node.body) {
+            transformFlags |= 3 /* AssertTypeScript */;
+        }
+        // function declarations with object rest destructuring are ES Next syntax
+        if (subtreeFlags & 1048576 /* ContainsObjectRest */) {
+            transformFlags |= 8 /* AssertESNext */;
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~1003668801 /* ConstructorExcludes */;
+    }
+    function computeMethod(node, subtreeFlags) {
+        // A MethodDeclaration is ES6 syntax.
+        var transformFlags = subtreeFlags | 192 /* AssertES2015 */;
+        // Decorators, TypeScript-specific modifiers, type parameters, type annotations, and
+        // overloads are TypeScript syntax.
+        if (node.decorators
+            || ts.hasModifier(node, 2270 /* TypeScriptModifier */)
+            || node.typeParameters
+            || node.type
+            || (node.name && ts.isComputedPropertyName(node.name)) // While computed method names aren't typescript, the TS transform must visit them to emit property declarations correctly
+            || !node.body) {
+            transformFlags |= 3 /* AssertTypeScript */;
+        }
+        // function declarations with object rest destructuring are ES Next syntax
+        if (subtreeFlags & 1048576 /* ContainsObjectRest */) {
+            transformFlags |= 8 /* AssertESNext */;
+        }
+        // An async method declaration is ES2017 syntax.
+        if (ts.hasModifier(node, 256 /* Async */)) {
+            transformFlags |= node.asteriskToken ? 8 /* AssertESNext */ : 16 /* AssertES2017 */;
+        }
+        if (node.asteriskToken) {
+            transformFlags |= 768 /* AssertGenerator */;
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~1003668801 /* MethodOrAccessorExcludes */;
+    }
+    function computeAccessor(node, subtreeFlags) {
+        var transformFlags = subtreeFlags;
+        // Decorators, TypeScript-specific modifiers, type annotations, and overloads are
+        // TypeScript syntax.
+        if (node.decorators
+            || ts.hasModifier(node, 2270 /* TypeScriptModifier */)
+            || node.type
+            || (node.name && ts.isComputedPropertyName(node.name)) // While computed accessor names aren't typescript, the TS transform must visit them to emit property declarations correctly
+            || !node.body) {
+            transformFlags |= 3 /* AssertTypeScript */;
+        }
+        // function declarations with object rest destructuring are ES Next syntax
+        if (subtreeFlags & 1048576 /* ContainsObjectRest */) {
+            transformFlags |= 8 /* AssertESNext */;
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~1003668801 /* MethodOrAccessorExcludes */;
+    }
+    function computePropertyDeclaration(node, subtreeFlags) {
+        // A PropertyDeclaration is TypeScript syntax.
+        var transformFlags = subtreeFlags | 3 /* AssertTypeScript */;
+        // If the PropertyDeclaration has an initializer or a computed name, we need to inform its ancestor
+        // so that it handle the transformation.
+        if (node.initializer || ts.isComputedPropertyName(node.name)) {
+            transformFlags |= 8192 /* ContainsPropertyInitializer */;
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~939525441 /* NodeExcludes */;
+    }
+    function computeFunctionDeclaration(node, subtreeFlags) {
+        var transformFlags;
+        var modifierFlags = ts.getModifierFlags(node);
+        var body = node.body;
+        if (!body || (modifierFlags & 2 /* Ambient */)) {
+            // An ambient declaration is TypeScript syntax.
+            // A FunctionDeclaration without a body is an overload and is TypeScript syntax.
+            transformFlags = 3 /* AssertTypeScript */;
+        }
+        else {
+            transformFlags = subtreeFlags | 33554432 /* ContainsHoistedDeclarationOrCompletion */;
+            // TypeScript-specific modifiers, type parameters, and type annotations are TypeScript
+            // syntax.
+            if (modifierFlags & 2270 /* TypeScriptModifier */
+                || node.typeParameters
+                || node.type) {
+                transformFlags |= 3 /* AssertTypeScript */;
+            }
+            // An async function declaration is ES2017 syntax.
+            if (modifierFlags & 256 /* Async */) {
+                transformFlags |= node.asteriskToken ? 8 /* AssertESNext */ : 16 /* AssertES2017 */;
+            }
+            // function declarations with object rest destructuring are ES Next syntax
+            if (subtreeFlags & 1048576 /* ContainsObjectRest */) {
+                transformFlags |= 8 /* AssertESNext */;
+            }
+            // If a FunctionDeclaration's subtree has marked the container as needing to capture the
+            // lexical this, or the function contains parameters with initializers, then this node is
+            // ES6 syntax.
+            if (subtreeFlags & 163840 /* ES2015FunctionSyntaxMask */) {
+                transformFlags |= 192 /* AssertES2015 */;
+            }
+            // If a FunctionDeclaration is generator function and is the body of a
+            // transformed async function, then this node can be transformed to a
+            // down-level generator.
+            // Currently we do not support transforming any other generator fucntions
+            // down level.
+            if (node.asteriskToken) {
+                transformFlags |= 768 /* AssertGenerator */;
+            }
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~1003935041 /* FunctionExcludes */;
+    }
+    function computeFunctionExpression(node, subtreeFlags) {
+        var transformFlags = subtreeFlags;
+        // TypeScript-specific modifiers, type parameters, and type annotations are TypeScript
+        // syntax.
+        if (ts.hasModifier(node, 2270 /* TypeScriptModifier */)
+            || node.typeParameters
+            || node.type) {
+            transformFlags |= 3 /* AssertTypeScript */;
+        }
+        // An async function expression is ES2017 syntax.
+        if (ts.hasModifier(node, 256 /* Async */)) {
+            transformFlags |= node.asteriskToken ? 8 /* AssertESNext */ : 16 /* AssertES2017 */;
+        }
+        // function expressions with object rest destructuring are ES Next syntax
+        if (subtreeFlags & 1048576 /* ContainsObjectRest */) {
+            transformFlags |= 8 /* AssertESNext */;
+        }
+        // If a FunctionExpression's subtree has marked the container as needing to capture the
+        // lexical this, or the function contains parameters with initializers, then this node is
+        // ES6 syntax.
+        if (subtreeFlags & 163840 /* ES2015FunctionSyntaxMask */) {
+            transformFlags |= 192 /* AssertES2015 */;
+        }
+        // If a FunctionExpression is generator function and is the body of a
+        // transformed async function, then this node can be transformed to a
+        // down-level generator.
+        if (node.asteriskToken) {
+            transformFlags |= 768 /* AssertGenerator */;
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~1003935041 /* FunctionExcludes */;
+    }
+    function computeArrowFunction(node, subtreeFlags) {
+        // An ArrowFunction is ES6 syntax, and excludes markers that should not escape the scope of an ArrowFunction.
+        var transformFlags = subtreeFlags | 192 /* AssertES2015 */;
+        // TypeScript-specific modifiers, type parameters, and type annotations are TypeScript
+        // syntax.
+        if (ts.hasModifier(node, 2270 /* TypeScriptModifier */)
+            || node.typeParameters
+            || node.type) {
+            transformFlags |= 3 /* AssertTypeScript */;
+        }
+        // An async arrow function is ES2017 syntax.
+        if (ts.hasModifier(node, 256 /* Async */)) {
+            transformFlags |= 16 /* AssertES2017 */;
+        }
+        // arrow functions with object rest destructuring are ES Next syntax
+        if (subtreeFlags & 1048576 /* ContainsObjectRest */) {
+            transformFlags |= 8 /* AssertESNext */;
+        }
+        // If an ArrowFunction contains a lexical this, its container must capture the lexical this.
+        if (subtreeFlags & 16384 /* ContainsLexicalThis */) {
+            transformFlags |= 32768 /* ContainsCapturedLexicalThis */;
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~1003902273 /* ArrowFunctionExcludes */;
+    }
+    function computePropertyAccess(node, subtreeFlags) {
+        var transformFlags = subtreeFlags;
+        // If a PropertyAccessExpression starts with a super keyword, then it is
+        // ES6 syntax, and requires a lexical `this` binding.
+        if (transformFlags & 134217728 /* Super */) {
+            transformFlags ^= 134217728 /* Super */;
+            transformFlags |= 268435456 /* ContainsSuper */;
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~671089985 /* PropertyAccessExcludes */;
+    }
+    function computeElementAccess(node, subtreeFlags) {
+        var transformFlags = subtreeFlags;
+        var expression = node.expression;
+        var expressionFlags = expression.transformFlags; // We do not want to aggregate flags from the argument expression for super/this capturing
+        // If an ElementAccessExpression starts with a super keyword, then it is
+        // ES6 syntax, and requires a lexical `this` binding.
+        if (expressionFlags & 134217728 /* Super */) {
+            transformFlags &= ~134217728 /* Super */;
+            transformFlags |= 268435456 /* ContainsSuper */;
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~671089985 /* PropertyAccessExcludes */;
+    }
+    function computeVariableDeclaration(node, subtreeFlags) {
+        var transformFlags = subtreeFlags;
+        transformFlags |= 192 /* AssertES2015 */ | 8388608 /* ContainsBindingPattern */;
+        // A VariableDeclaration containing ObjectRest is ESNext syntax
+        if (subtreeFlags & 1048576 /* ContainsObjectRest */) {
+            transformFlags |= 8 /* AssertESNext */;
+        }
+        // Type annotations are TypeScript syntax.
+        if (node.type) {
+            transformFlags |= 3 /* AssertTypeScript */;
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~939525441 /* NodeExcludes */;
+    }
+    function computeVariableStatement(node, subtreeFlags) {
+        var transformFlags;
+        var declarationListTransformFlags = node.declarationList.transformFlags;
+        // An ambient declaration is TypeScript syntax.
+        if (ts.hasModifier(node, 2 /* Ambient */)) {
+            transformFlags = 3 /* AssertTypeScript */;
+        }
+        else {
+            transformFlags = subtreeFlags;
+            if (declarationListTransformFlags & 8388608 /* ContainsBindingPattern */) {
+                transformFlags |= 192 /* AssertES2015 */;
+            }
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~939525441 /* NodeExcludes */;
+    }
+    function computeLabeledStatement(node, subtreeFlags) {
+        var transformFlags = subtreeFlags;
+        // A labeled statement containing a block scoped binding *may* need to be transformed from ES6.
+        if (subtreeFlags & 4194304 /* ContainsBlockScopedBinding */
+            && ts.isIterationStatement(node, /*lookInLabeledStatements*/ true)) {
+            transformFlags |= 192 /* AssertES2015 */;
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~939525441 /* NodeExcludes */;
+    }
+    function computeImportEquals(node, subtreeFlags) {
+        var transformFlags = subtreeFlags;
+        // An ImportEqualsDeclaration with a namespace reference is TypeScript.
+        if (!ts.isExternalModuleImportEqualsDeclaration(node)) {
+            transformFlags |= 3 /* AssertTypeScript */;
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~939525441 /* NodeExcludes */;
+    }
+    function computeExpressionStatement(node, subtreeFlags) {
+        var transformFlags = subtreeFlags;
+        // If the expression of an expression statement is a destructuring assignment,
+        // then we treat the statement as ES6 so that we can indicate that we do not
+        // need to hold on to the right-hand side.
+        if (node.expression.transformFlags & 1024 /* DestructuringAssignment */) {
+            transformFlags |= 192 /* AssertES2015 */;
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~939525441 /* NodeExcludes */;
+    }
+    function computeModuleDeclaration(node, subtreeFlags) {
+        var transformFlags = 3 /* AssertTypeScript */;
+        var modifierFlags = ts.getModifierFlags(node);
+        if ((modifierFlags & 2 /* Ambient */) === 0) {
+            transformFlags |= subtreeFlags;
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~977327425 /* ModuleExcludes */;
+    }
+    function computeVariableDeclarationList(node, subtreeFlags) {
+        var transformFlags = subtreeFlags | 33554432 /* ContainsHoistedDeclarationOrCompletion */;
+        if (subtreeFlags & 8388608 /* ContainsBindingPattern */) {
+            transformFlags |= 192 /* AssertES2015 */;
+        }
+        // If a VariableDeclarationList is `let` or `const`, then it is ES6 syntax.
+        if (node.flags & 3 /* BlockScoped */) {
+            transformFlags |= 192 /* AssertES2015 */ | 4194304 /* ContainsBlockScopedBinding */;
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~948962625 /* VariableDeclarationListExcludes */;
+    }
+    function computeOther(node, kind, subtreeFlags) {
+        // Mark transformations needed for each node
+        var transformFlags = subtreeFlags;
+        var excludeFlags = 939525441 /* NodeExcludes */;
+        switch (kind) {
+            case 120 /* AsyncKeyword */:
+            case 197 /* AwaitExpression */:
+                // async/await is ES2017 syntax, but may be ESNext syntax (for async generators)
+                transformFlags |= 8 /* AssertESNext */ | 16 /* AssertES2017 */;
+                break;
+            case 190 /* TypeAssertionExpression */:
+            case 208 /* AsExpression */:
+            case 301 /* PartiallyEmittedExpression */:
+                // These nodes are TypeScript syntax.
+                transformFlags |= 3 /* AssertTypeScript */;
+                excludeFlags = 536872257 /* OuterExpressionExcludes */;
+                break;
+            case 114 /* PublicKeyword */:
+            case 112 /* PrivateKeyword */:
+            case 113 /* ProtectedKeyword */:
+            case 117 /* AbstractKeyword */:
+            case 124 /* DeclareKeyword */:
+            case 76 /* ConstKeyword */:
+            case 238 /* EnumDeclaration */:
+            case 273 /* EnumMember */:
+            case 209 /* NonNullExpression */:
+            case 132 /* ReadonlyKeyword */:
+                // These nodes are TypeScript syntax.
+                transformFlags |= 3 /* AssertTypeScript */;
+                break;
+            case 255 /* JsxElement */:
+            case 256 /* JsxSelfClosingElement */:
+            case 257 /* JsxOpeningElement */:
+            case 10 /* JsxText */:
+            case 258 /* JsxClosingElement */:
+            case 259 /* JsxFragment */:
+            case 260 /* JsxOpeningFragment */:
+            case 261 /* JsxClosingFragment */:
+            case 262 /* JsxAttribute */:
+            case 263 /* JsxAttributes */:
+            case 264 /* JsxSpreadAttribute */:
+            case 265 /* JsxExpression */:
+                // These nodes are Jsx syntax.
+                transformFlags |= 4 /* AssertJsx */;
+                break;
+            case 13 /* NoSubstitutionTemplateLiteral */:
+            case 14 /* TemplateHead */:
+            case 15 /* TemplateMiddle */:
+            case 16 /* TemplateTail */:
+            case 202 /* TemplateExpression */:
+            case 189 /* TaggedTemplateExpression */:
+            case 271 /* ShorthandPropertyAssignment */:
+            case 115 /* StaticKeyword */:
+            case 210 /* MetaProperty */:
+                // These nodes are ES6 syntax.
+                transformFlags |= 192 /* AssertES2015 */;
+                break;
+            case 9 /* StringLiteral */:
+                if (node.hasExtendedUnicodeEscape) {
+                    transformFlags |= 192 /* AssertES2015 */;
+                }
+                break;
+            case 8 /* NumericLiteral */:
+                if (node.numericLiteralFlags & 384 /* BinaryOrOctalSpecifier */) {
+                    transformFlags |= 192 /* AssertES2015 */;
+                }
+                break;
+            case 222 /* ForOfStatement */:
+                // This node is either ES2015 syntax or ES2017 syntax (if it is a for-await-of).
+                if (node.awaitModifier) {
+                    transformFlags |= 8 /* AssertESNext */;
+                }
+                transformFlags |= 192 /* AssertES2015 */;
+                break;
+            case 203 /* YieldExpression */:
+                // This node is either ES2015 syntax (in a generator) or ES2017 syntax (in an async
+                // generator).
+                transformFlags |= 8 /* AssertESNext */ | 192 /* AssertES2015 */ | 16777216 /* ContainsYield */;
+                break;
+            case 119 /* AnyKeyword */:
+            case 134 /* NumberKeyword */:
+            case 131 /* NeverKeyword */:
+            case 135 /* ObjectKeyword */:
+            case 137 /* StringKeyword */:
+            case 122 /* BooleanKeyword */:
+            case 138 /* SymbolKeyword */:
+            case 105 /* VoidKeyword */:
+            case 148 /* TypeParameter */:
+            case 151 /* PropertySignature */:
+            case 153 /* MethodSignature */:
+            case 158 /* CallSignature */:
+            case 159 /* ConstructSignature */:
+            case 160 /* IndexSignature */:
+            case 161 /* TypePredicate */:
+            case 162 /* TypeReference */:
+            case 163 /* FunctionType */:
+            case 164 /* ConstructorType */:
+            case 165 /* TypeQuery */:
+            case 166 /* TypeLiteral */:
+            case 167 /* ArrayType */:
+            case 168 /* TupleType */:
+            case 169 /* UnionType */:
+            case 170 /* IntersectionType */:
+            case 171 /* ConditionalType */:
+            case 172 /* InferType */:
+            case 173 /* ParenthesizedType */:
+            case 236 /* InterfaceDeclaration */:
+            case 237 /* TypeAliasDeclaration */:
+            case 174 /* ThisType */:
+            case 175 /* TypeOperator */:
+            case 176 /* IndexedAccessType */:
+            case 177 /* MappedType */:
+            case 178 /* LiteralType */:
+            case 242 /* NamespaceExportDeclaration */:
+                // Types and signatures are TypeScript syntax, and exclude all other facts.
+                transformFlags = 3 /* AssertTypeScript */;
+                excludeFlags = -3 /* TypeExcludes */;
+                break;
+            case 147 /* ComputedPropertyName */:
+                // Even though computed property names are ES6, we don't treat them as such.
+                // This is so that they can flow through PropertyName transforms unaffected.
+                // Instead, we mark the container as ES6, so that it can properly handle the transform.
+                transformFlags |= 2097152 /* ContainsComputedPropertyName */;
+                if (subtreeFlags & 16384 /* ContainsLexicalThis */) {
+                    // A computed method name like `[this.getName()](x: string) { ... }` needs to
+                    // distinguish itself from the normal case of a method body containing `this`:
+                    // `this` inside a method doesn't need to be rewritten (the method provides `this`),
+                    // whereas `this` inside a computed name *might* need to be rewritten if the class/object
+                    // is inside an arrow function:
+                    // `_this = this; () => class K { [_this.getName()]() { ... } }`
+                    // To make this distinction, use ContainsLexicalThisInComputedPropertyName
+                    // instead of ContainsLexicalThis for computed property names
+                    transformFlags |= 65536 /* ContainsLexicalThisInComputedPropertyName */;
+                }
+                break;
+            case 204 /* SpreadElement */:
+                transformFlags |= 192 /* AssertES2015 */ | 524288 /* ContainsSpread */;
+                break;
+            case 272 /* SpreadAssignment */:
+                transformFlags |= 8 /* AssertESNext */ | 1048576 /* ContainsObjectSpread */;
+                break;
+            case 97 /* SuperKeyword */:
+                // This node is ES6 syntax.
+                transformFlags |= 192 /* AssertES2015 */ | 134217728 /* Super */;
+                excludeFlags = 536872257 /* OuterExpressionExcludes */; // must be set to persist `Super`
+                break;
+            case 99 /* ThisKeyword */:
+                // Mark this node and its ancestors as containing a lexical `this` keyword.
+                transformFlags |= 16384 /* ContainsLexicalThis */;
+                break;
+            case 180 /* ObjectBindingPattern */:
+                transformFlags |= 192 /* AssertES2015 */ | 8388608 /* ContainsBindingPattern */;
+                if (subtreeFlags & 524288 /* ContainsRest */) {
+                    transformFlags |= 8 /* AssertESNext */ | 1048576 /* ContainsObjectRest */;
+                }
+                excludeFlags = 940049729 /* BindingPatternExcludes */;
+                break;
+            case 181 /* ArrayBindingPattern */:
+                transformFlags |= 192 /* AssertES2015 */ | 8388608 /* ContainsBindingPattern */;
+                excludeFlags = 940049729 /* BindingPatternExcludes */;
+                break;
+            case 182 /* BindingElement */:
+                transformFlags |= 192 /* AssertES2015 */;
+                if (node.dotDotDotToken) {
+                    transformFlags |= 524288 /* ContainsRest */;
+                }
+                break;
+            case 150 /* Decorator */:
+                // This node is TypeScript syntax, and marks its container as also being TypeScript syntax.
+                transformFlags |= 3 /* AssertTypeScript */ | 4096 /* ContainsDecorators */;
+                break;
+            case 184 /* ObjectLiteralExpression */:
+                excludeFlags = 942740801 /* ObjectLiteralExcludes */;
+                if (subtreeFlags & 2097152 /* ContainsComputedPropertyName */) {
+                    // If an ObjectLiteralExpression contains a ComputedPropertyName, then it
+                    // is an ES6 node.
+                    transformFlags |= 192 /* AssertES2015 */;
+                }
+                if (subtreeFlags & 65536 /* ContainsLexicalThisInComputedPropertyName */) {
+                    // A computed property name containing `this` might need to be rewritten,
+                    // so propagate the ContainsLexicalThis flag upward.
+                    transformFlags |= 16384 /* ContainsLexicalThis */;
+                }
+                if (subtreeFlags & 1048576 /* ContainsObjectSpread */) {
+                    // If an ObjectLiteralExpression contains a spread element, then it
+                    // is an ES next node.
+                    transformFlags |= 8 /* AssertESNext */;
+                }
+                break;
+            case 183 /* ArrayLiteralExpression */:
+            case 188 /* NewExpression */:
+                excludeFlags = 940049729 /* ArrayLiteralOrCallOrNewExcludes */;
+                if (subtreeFlags & 524288 /* ContainsSpread */) {
+                    // If the this node contains a SpreadExpression, then it is an ES6
+                    // node.
+                    transformFlags |= 192 /* AssertES2015 */;
+                }
+                break;
+            case 218 /* DoStatement */:
+            case 219 /* WhileStatement */:
+            case 220 /* ForStatement */:
+            case 221 /* ForInStatement */:
+                // A loop containing a block scoped binding *may* need to be transformed from ES6.
+                if (subtreeFlags & 4194304 /* ContainsBlockScopedBinding */) {
+                    transformFlags |= 192 /* AssertES2015 */;
+                }
+                break;
+            case 274 /* SourceFile */:
+                if (subtreeFlags & 32768 /* ContainsCapturedLexicalThis */) {
+                    transformFlags |= 192 /* AssertES2015 */;
+                }
+                break;
+            case 225 /* ReturnStatement */:
+                // Return statements may require an `await` in ESNext.
+                transformFlags |= 33554432 /* ContainsHoistedDeclarationOrCompletion */ | 8 /* AssertESNext */;
+                break;
+            case 223 /* ContinueStatement */:
+            case 224 /* BreakStatement */:
+                transformFlags |= 33554432 /* ContainsHoistedDeclarationOrCompletion */;
+                break;
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~excludeFlags;
+    }
+    /**
+     * Gets the transform flags to exclude when unioning the transform flags of a subtree.
+     *
+     * NOTE: This needs to be kept up-to-date with the exclusions used in `computeTransformFlagsForNode`.
+     *       For performance reasons, `computeTransformFlagsForNode` uses local constant values rather
+     *       than calling this function.
+     */
+    /* @internal */
+    function getTransformFlagsSubtreeExclusions(kind) {
+        if (kind >= 161 /* FirstTypeNode */ && kind <= 179 /* LastTypeNode */) {
+            return -3 /* TypeExcludes */;
+        }
+        switch (kind) {
+            case 187 /* CallExpression */:
+            case 188 /* NewExpression */:
+            case 183 /* ArrayLiteralExpression */:
+                return 940049729 /* ArrayLiteralOrCallOrNewExcludes */;
+            case 239 /* ModuleDeclaration */:
+                return 977327425 /* ModuleExcludes */;
+            case 149 /* Parameter */:
+                return 939525441 /* ParameterExcludes */;
+            case 193 /* ArrowFunction */:
+                return 1003902273 /* ArrowFunctionExcludes */;
+            case 192 /* FunctionExpression */:
+            case 234 /* FunctionDeclaration */:
+                return 1003935041 /* FunctionExcludes */;
+            case 233 /* VariableDeclarationList */:
+                return 948962625 /* VariableDeclarationListExcludes */;
+            case 235 /* ClassDeclaration */:
+            case 205 /* ClassExpression */:
+                return 942011713 /* ClassExcludes */;
+            case 155 /* Constructor */:
+                return 1003668801 /* ConstructorExcludes */;
+            case 154 /* MethodDeclaration */:
+            case 156 /* GetAccessor */:
+            case 157 /* SetAccessor */:
+                return 1003668801 /* MethodOrAccessorExcludes */;
+            case 119 /* AnyKeyword */:
+            case 134 /* NumberKeyword */:
+            case 131 /* NeverKeyword */:
+            case 137 /* StringKeyword */:
+            case 135 /* ObjectKeyword */:
+            case 122 /* BooleanKeyword */:
+            case 138 /* SymbolKeyword */:
+            case 105 /* VoidKeyword */:
+            case 148 /* TypeParameter */:
+            case 151 /* PropertySignature */:
+            case 153 /* MethodSignature */:
+            case 158 /* CallSignature */:
+            case 159 /* ConstructSignature */:
+            case 160 /* IndexSignature */:
+            case 236 /* InterfaceDeclaration */:
+            case 237 /* TypeAliasDeclaration */:
+                return -3 /* TypeExcludes */;
+            case 184 /* ObjectLiteralExpression */:
+                return 942740801 /* ObjectLiteralExcludes */;
+            case 269 /* CatchClause */:
+                return 940574017 /* CatchClauseExcludes */;
+            case 180 /* ObjectBindingPattern */:
+            case 181 /* ArrayBindingPattern */:
+                return 940049729 /* BindingPatternExcludes */;
+            case 190 /* TypeAssertionExpression */:
+            case 208 /* AsExpression */:
+            case 301 /* PartiallyEmittedExpression */:
+            case 191 /* ParenthesizedExpression */:
+            case 97 /* SuperKeyword */:
+                return 536872257 /* OuterExpressionExcludes */;
+            case 185 /* PropertyAccessExpression */:
+            case 186 /* ElementAccessExpression */:
+                return 671089985 /* PropertyAccessExcludes */;
+            default:
+                return 939525441 /* NodeExcludes */;
+        }
+    }
+    ts.getTransformFlagsSubtreeExclusions = getTransformFlagsSubtreeExclusions;
+    /**
+     * "Binds" JSDoc nodes in TypeScript code.
+     * Since we will never create symbols for JSDoc, we just set parent pointers instead.
+     */
+    function setParentPointers(parent, child) {
+        child.parent = parent;
+        ts.forEachChild(child, function (grandchild) { return setParentPointers(child, grandchild); });
+    }
+})(ts || (ts = {}));
+/** @internal */
+var ts;
+(function (ts) {
+    function createGetSymbolWalker(getRestTypeOfSignature, getTypePredicateOfSignature, getReturnTypeOfSignature, getBaseTypes, resolveStructuredTypeMembers, getTypeOfSymbol, getResolvedSymbol, getIndexTypeOfStructuredType, getConstraintFromTypeParameter, getFirstIdentifier) {
+        return getSymbolWalker;
+        function getSymbolWalker(accept) {
+            if (accept === void 0) { accept = function () { return true; }; }
+            var visitedTypes = []; // Sparse array from id to type
+            var visitedSymbols = []; // Sparse array from id to symbol
+            return {
+                walkType: function (type) {
+                    try {
+                        visitType(type);
+                        return { visitedTypes: ts.getOwnValues(visitedTypes), visitedSymbols: ts.getOwnValues(visitedSymbols) };
+                    }
+                    finally {
+                        ts.clear(visitedTypes);
+                        ts.clear(visitedSymbols);
+                    }
+                },
+                walkSymbol: function (symbol) {
+                    try {
+                        visitSymbol(symbol);
+                        return { visitedTypes: ts.getOwnValues(visitedTypes), visitedSymbols: ts.getOwnValues(visitedSymbols) };
+                    }
+                    finally {
+                        ts.clear(visitedTypes);
+                        ts.clear(visitedSymbols);
+                    }
+                },
+            };
+            function visitType(type) {
+                if (!type) {
+                    return;
+                }
+                if (visitedTypes[type.id]) {
+                    return;
+                }
+                visitedTypes[type.id] = type;
+                // Reuse visitSymbol to visit the type's symbol,
+                //  but be sure to bail on recuring into the type if accept declines the symbol.
+                var shouldBail = visitSymbol(type.symbol);
+                if (shouldBail)
+                    return;
+                // Visit the type's related types, if any
+                if (type.flags & 131072 /* Object */) {
+                    var objectType = type;
+                    var objectFlags = objectType.objectFlags;
+                    if (objectFlags & 4 /* Reference */) {
+                        visitTypeReference(type);
+                    }
+                    if (objectFlags & 32 /* Mapped */) {
+                        visitMappedType(type);
+                    }
+                    if (objectFlags & (1 /* Class */ | 2 /* Interface */)) {
+                        visitInterfaceType(type);
+                    }
+                    if (objectFlags & (8 /* Tuple */ | 16 /* Anonymous */)) {
+                        visitObjectType(objectType);
+                    }
+                }
+                if (type.flags & 65536 /* TypeParameter */) {
+                    visitTypeParameter(type);
+                }
+                if (type.flags & 786432 /* UnionOrIntersection */) {
+                    visitUnionOrIntersectionType(type);
+                }
+                if (type.flags & 1048576 /* Index */) {
+                    visitIndexType(type);
+                }
+                if (type.flags & 2097152 /* IndexedAccess */) {
+                    visitIndexedAccessType(type);
+                }
+            }
+            function visitTypeReference(type) {
+                visitType(type.target);
+                ts.forEach(type.typeArguments, visitType);
+            }
+            function visitTypeParameter(type) {
+                visitType(getConstraintFromTypeParameter(type));
+            }
+            function visitUnionOrIntersectionType(type) {
+                ts.forEach(type.types, visitType);
+            }
+            function visitIndexType(type) {
+                visitType(type.type);
+            }
+            function visitIndexedAccessType(type) {
+                visitType(type.objectType);
+                visitType(type.indexType);
+                visitType(type.constraint);
+            }
+            function visitMappedType(type) {
+                visitType(type.typeParameter);
+                visitType(type.constraintType);
+                visitType(type.templateType);
+                visitType(type.modifiersType);
+            }
+            function visitSignature(signature) {
+                var typePredicate = getTypePredicateOfSignature(signature);
+                if (typePredicate) {
+                    visitType(typePredicate.type);
+                }
+                ts.forEach(signature.typeParameters, visitType);
+                for (var _i = 0, _a = signature.parameters; _i < _a.length; _i++) {
+                    var parameter = _a[_i];
+                    visitSymbol(parameter);
+                }
+                visitType(getRestTypeOfSignature(signature));
+                visitType(getReturnTypeOfSignature(signature));
+            }
+            function visitInterfaceType(interfaceT) {
+                visitObjectType(interfaceT);
+                ts.forEach(interfaceT.typeParameters, visitType);
+                ts.forEach(getBaseTypes(interfaceT), visitType);
+                visitType(interfaceT.thisType);
+            }
+            function visitObjectType(type) {
+                var stringIndexType = getIndexTypeOfStructuredType(type, 0 /* String */);
+                visitType(stringIndexType);
+                var numberIndexType = getIndexTypeOfStructuredType(type, 1 /* Number */);
+                visitType(numberIndexType);
+                // The two checks above *should* have already resolved the type (if needed), so this should be cached
+                var resolved = resolveStructuredTypeMembers(type);
+                for (var _i = 0, _a = resolved.callSignatures; _i < _a.length; _i++) {
+                    var signature = _a[_i];
+                    visitSignature(signature);
+                }
+                for (var _b = 0, _c = resolved.constructSignatures; _b < _c.length; _b++) {
+                    var signature = _c[_b];
+                    visitSignature(signature);
+                }
+                for (var _d = 0, _e = resolved.properties; _d < _e.length; _d++) {
+                    var p = _e[_d];
+                    visitSymbol(p);
+                }
+            }
+            function visitSymbol(symbol) {
+                if (!symbol) {
+                    return false;
+                }
+                var symbolId = ts.getSymbolId(symbol);
+                if (visitedSymbols[symbolId]) {
+                    return false;
+                }
+                visitedSymbols[symbolId] = symbol;
+                if (!accept(symbol)) {
+                    return true;
+                }
+                var t = getTypeOfSymbol(symbol);
+                visitType(t); // Should handle members on classes and such
+                if (symbol.flags & 1955 /* HasExports */) {
+                    symbol.exports.forEach(visitSymbol);
+                }
+                ts.forEach(symbol.declarations, function (d) {
+                    // Type queries are too far resolved when we just visit the symbol's type
+                    //  (their type resolved directly to the member deeply referenced)
+                    // So to get the intervening symbols, we need to check if there's a type
+                    // query node on any of the symbol's declarations and get symbols there
+                    if (d.type && d.type.kind === 165 /* TypeQuery */) {
+                        var query = d.type;
+                        var entity = getResolvedSymbol(getFirstIdentifier(query.exprName));
+                        visitSymbol(entity);
+                    }
+                });
+                return false;
+            }
+        }
+    }
+    ts.createGetSymbolWalker = createGetSymbolWalker;
+})(ts || (ts = {}));
+/* @internal */
+var ts;
+(function (ts) {
+    var ambientModuleSymbolRegex = /^".+"$/;
+    var nextSymbolId = 1;
+    var nextNodeId = 1;
+    var nextMergeId = 1;
+    var nextFlowId = 1;
+    function getNodeId(node) {
+        if (!node.id) {
+            node.id = nextNodeId;
+            nextNodeId++;
+        }
+        return node.id;
+    }
+    ts.getNodeId = getNodeId;
+    function getSymbolId(symbol) {
+        if (!symbol.id) {
+            symbol.id = nextSymbolId;
+            nextSymbolId++;
+        }
+        return symbol.id;
+    }
+    ts.getSymbolId = getSymbolId;
+    function isInstantiatedModule(node, preserveConstEnums) {
+        var moduleState = ts.getModuleInstanceState(node);
+        return moduleState === 1 /* Instantiated */ ||
+            (preserveConstEnums && moduleState === 2 /* ConstEnumOnly */);
+    }
+    ts.isInstantiatedModule = isInstantiatedModule;
+    function createTypeChecker(host, produceDiagnostics) {
+        // Cancellation that controls whether or not we can cancel in the middle of type checking.
+        // In general cancelling is *not* safe for the type checker.  We might be in the middle of
+        // computing something, and we will leave our internals in an inconsistent state.  Callers
+        // who set the cancellation token should catch if a cancellation exception occurs, and
+        // should throw away and create a new TypeChecker.
+        //
+        // Currently we only support setting the cancellation token when getting diagnostics.  This
+        // is because diagnostics can be quite expensive, and we want to allow hosts to bail out if
+        // they no longer need the information (for example, if the user started editing again).
+        var cancellationToken;
+        var requestedExternalEmitHelpers;
+        var externalHelpersModule;
+        // tslint:disable variable-name
+        var Symbol = ts.objectAllocator.getSymbolConstructor();
+        var Type = ts.objectAllocator.getTypeConstructor();
+        var Signature = ts.objectAllocator.getSignatureConstructor();
+        // tslint:enable variable-name
+        var typeCount = 0;
+        var symbolCount = 0;
+        var enumCount = 0;
+        var symbolInstantiationDepth = 0;
+        var emptySymbols = ts.createSymbolTable();
+        var identityMapper = ts.identity;
+        var compilerOptions = host.getCompilerOptions();
+        var languageVersion = ts.getEmitScriptTarget(compilerOptions);
+        var moduleKind = ts.getEmitModuleKind(compilerOptions);
+        var allowSyntheticDefaultImports = ts.getAllowSyntheticDefaultImports(compilerOptions);
+        var strictNullChecks = ts.getStrictOptionValue(compilerOptions, "strictNullChecks");
+        var strictFunctionTypes = ts.getStrictOptionValue(compilerOptions, "strictFunctionTypes");
+        var strictPropertyInitialization = ts.getStrictOptionValue(compilerOptions, "strictPropertyInitialization");
+        var noImplicitAny = ts.getStrictOptionValue(compilerOptions, "noImplicitAny");
+        var noImplicitThis = ts.getStrictOptionValue(compilerOptions, "noImplicitThis");
+        var keyofStringsOnly = !!compilerOptions.keyofStringsOnly;
+        var emitResolver = createResolver();
+        var nodeBuilder = createNodeBuilder();
+        var undefinedSymbol = createSymbol(4 /* Property */, "undefined");
+        undefinedSymbol.declarations = [];
+        var argumentsSymbol = createSymbol(4 /* Property */, "arguments");
+        var requireSymbol = createSymbol(4 /* Property */, "require");
+        var moduleSymbol = createSymbol(4 /* Property */, "module");
+        /** This will be set during calls to `getResolvedSignature` where services determines an apparent number of arguments greater than what is actually provided. */
+        var apparentArgumentCount;
+        // for public members that accept a Node or one of its subtypes, we must guard against
+        // synthetic nodes created during transformations by calling `getParseTreeNode`.
+        // for most of these, we perform the guard only on `checker` to avoid any possible
+        // extra cost of calling `getParseTreeNode` when calling these functions from inside the
+        // checker.
+        var checker = {
+            getNodeCount: function () { return ts.sum(host.getSourceFiles(), "nodeCount"); },
+            getIdentifierCount: function () { return ts.sum(host.getSourceFiles(), "identifierCount"); },
+            getSymbolCount: function () { return ts.sum(host.getSourceFiles(), "symbolCount") + symbolCount; },
+            getTypeCount: function () { return typeCount; },
+            isUndefinedSymbol: function (symbol) { return symbol === undefinedSymbol; },
+            isArgumentsSymbol: function (symbol) { return symbol === argumentsSymbol; },
+            isUnknownSymbol: function (symbol) { return symbol === unknownSymbol; },
+            getMergedSymbol: getMergedSymbol,
+            getDiagnostics: getDiagnostics,
+            getGlobalDiagnostics: getGlobalDiagnostics,
+            getTypeOfSymbolAtLocation: function (symbol, location) {
+                location = ts.getParseTreeNode(location);
+                return location ? getTypeOfSymbolAtLocation(symbol, location) : errorType;
+            },
+            getSymbolsOfParameterPropertyDeclaration: function (parameterIn, parameterName) {
+                var parameter = ts.getParseTreeNode(parameterIn, ts.isParameter);
+                if (parameter === undefined)
+                    return ts.Debug.fail("Cannot get symbols of a synthetic parameter that cannot be resolved to a parse-tree node.");
+                return getSymbolsOfParameterPropertyDeclaration(parameter, ts.escapeLeadingUnderscores(parameterName));
+            },
+            getDeclaredTypeOfSymbol: getDeclaredTypeOfSymbol,
+            getPropertiesOfType: getPropertiesOfType,
+            getPropertyOfType: function (type, name) { return getPropertyOfType(type, ts.escapeLeadingUnderscores(name)); },
+            getIndexInfoOfType: getIndexInfoOfType,
+            getSignaturesOfType: getSignaturesOfType,
+            getIndexTypeOfType: getIndexTypeOfType,
+            getBaseTypes: getBaseTypes,
+            getBaseTypeOfLiteralType: getBaseTypeOfLiteralType,
+            getWidenedType: getWidenedType,
+            getTypeFromTypeNode: function (nodeIn) {
+                var node = ts.getParseTreeNode(nodeIn, ts.isTypeNode);
+                return node ? getTypeFromTypeNode(node) : errorType;
+            },
+            getParameterType: getTypeAtPosition,
+            getReturnTypeOfSignature: getReturnTypeOfSignature,
+            getNullableType: getNullableType,
+            getNonNullableType: getNonNullableType,
+            typeToTypeNode: nodeBuilder.typeToTypeNode,
+            indexInfoToIndexSignatureDeclaration: nodeBuilder.indexInfoToIndexSignatureDeclaration,
+            signatureToSignatureDeclaration: nodeBuilder.signatureToSignatureDeclaration,
+            symbolToEntityName: nodeBuilder.symbolToEntityName,
+            symbolToExpression: nodeBuilder.symbolToExpression,
+            symbolToTypeParameterDeclarations: nodeBuilder.symbolToTypeParameterDeclarations,
+            symbolToParameterDeclaration: nodeBuilder.symbolToParameterDeclaration,
+            typeParameterToDeclaration: nodeBuilder.typeParameterToDeclaration,
+            getSymbolsInScope: function (location, meaning) {
+                location = ts.getParseTreeNode(location);
+                return location ? getSymbolsInScope(location, meaning) : [];
+            },
+            getSymbolAtLocation: function (node) {
+                node = ts.getParseTreeNode(node);
+                return node ? getSymbolAtLocation(node) : undefined;
+            },
+            getShorthandAssignmentValueSymbol: function (node) {
+                node = ts.getParseTreeNode(node);
+                return node ? getShorthandAssignmentValueSymbol(node) : undefined;
+            },
+            getExportSpecifierLocalTargetSymbol: function (nodeIn) {
+                var node = ts.getParseTreeNode(nodeIn, ts.isExportSpecifier);
+                return node ? getExportSpecifierLocalTargetSymbol(node) : undefined;
+            },
+            getExportSymbolOfSymbol: function (symbol) {
+                return getMergedSymbol(symbol.exportSymbol || symbol);
+            },
+            getTypeAtLocation: function (node) {
+                node = ts.getParseTreeNode(node);
+                return node ? getTypeOfNode(node) : errorType;
+            },
+            getPropertySymbolOfDestructuringAssignment: function (locationIn) {
+                var location = ts.getParseTreeNode(locationIn, ts.isIdentifier);
+                return location ? getPropertySymbolOfDestructuringAssignment(location) : undefined;
+            },
+            signatureToString: function (signature, enclosingDeclaration, flags, kind) {
+                return signatureToString(signature, ts.getParseTreeNode(enclosingDeclaration), flags, kind);
+            },
+            typeToString: function (type, enclosingDeclaration, flags) {
+                return typeToString(type, ts.getParseTreeNode(enclosingDeclaration), flags);
+            },
+            symbolToString: function (symbol, enclosingDeclaration, meaning, flags) {
+                return symbolToString(symbol, ts.getParseTreeNode(enclosingDeclaration), meaning, flags);
+            },
+            typePredicateToString: function (predicate, enclosingDeclaration, flags) {
+                return typePredicateToString(predicate, ts.getParseTreeNode(enclosingDeclaration), flags);
+            },
+            writeSignature: function (signature, enclosingDeclaration, flags, kind, writer) {
+                return signatureToString(signature, ts.getParseTreeNode(enclosingDeclaration), flags, kind, writer);
+            },
+            writeType: function (type, enclosingDeclaration, flags, writer) {
+                return typeToString(type, ts.getParseTreeNode(enclosingDeclaration), flags, writer);
+            },
+            writeSymbol: function (symbol, enclosingDeclaration, meaning, flags, writer) {
+                return symbolToString(symbol, ts.getParseTreeNode(enclosingDeclaration), meaning, flags, writer);
+            },
+            writeTypePredicate: function (predicate, enclosingDeclaration, flags, writer) {
+                return typePredicateToString(predicate, ts.getParseTreeNode(enclosingDeclaration), flags, writer);
+            },
+            getSymbolDisplayBuilder: getSymbolDisplayBuilder,
+            getAugmentedPropertiesOfType: getAugmentedPropertiesOfType,
+            getRootSymbols: getRootSymbols,
+            getContextualType: function (nodeIn) {
+                var node = ts.getParseTreeNode(nodeIn, ts.isExpression);
+                return node ? getContextualType(node) : undefined;
+            },
+            getContextualTypeForArgumentAtIndex: function (nodeIn, argIndex) {
+                var node = ts.getParseTreeNode(nodeIn, ts.isCallLikeExpression);
+                return node && getContextualTypeForArgumentAtIndex(node, argIndex);
+            },
+            getContextualTypeForJsxAttribute: function (nodeIn) {
+                var node = ts.getParseTreeNode(nodeIn, ts.isJsxAttributeLike);
+                return node && getContextualTypeForJsxAttribute(node);
+            },
+            isContextSensitive: isContextSensitive,
+            getFullyQualifiedName: getFullyQualifiedName,
+            getResolvedSignature: function (nodeIn, candidatesOutArray, theArgumentCount) {
+                var node = ts.getParseTreeNode(nodeIn, ts.isCallLikeExpression);
+                apparentArgumentCount = theArgumentCount;
+                var res = node ? getResolvedSignature(node, candidatesOutArray) : undefined;
+                apparentArgumentCount = undefined;
+                return res;
+            },
+            getConstantValue: function (nodeIn) {
+                var node = ts.getParseTreeNode(nodeIn, canHaveConstantValue);
+                return node ? getConstantValue(node) : undefined;
+            },
+            isValidPropertyAccess: function (nodeIn, propertyName) {
+                var node = ts.getParseTreeNode(nodeIn, ts.isPropertyAccessOrQualifiedNameOrImportTypeNode);
+                return !!node && isValidPropertyAccess(node, ts.escapeLeadingUnderscores(propertyName));
+            },
+            isValidPropertyAccessForCompletions: function (nodeIn, type, property) {
+                var node = ts.getParseTreeNode(nodeIn, ts.isPropertyAccessExpression);
+                return !!node && isValidPropertyAccessForCompletions(node, type, property);
+            },
+            getSignatureFromDeclaration: function (declarationIn) {
+                var declaration = ts.getParseTreeNode(declarationIn, ts.isFunctionLike);
+                return declaration ? getSignatureFromDeclaration(declaration) : undefined;
+            },
+            isImplementationOfOverload: function (node) {
+                var parsed = ts.getParseTreeNode(node, ts.isFunctionLike);
+                return parsed ? isImplementationOfOverload(parsed) : undefined;
+            },
+            getImmediateAliasedSymbol: function (symbol) {
+                ts.Debug.assert((symbol.flags & 2097152 /* Alias */) !== 0, "Should only get Alias here.");
+                var links = getSymbolLinks(symbol);
+                if (!links.immediateTarget) {
+                    var node = getDeclarationOfAliasSymbol(symbol);
+                    if (!node)
+                        return ts.Debug.fail();
+                    links.immediateTarget = getTargetOfAliasDeclaration(node, /*dontRecursivelyResolve*/ true);
+                }
+                return links.immediateTarget;
+            },
+            getAliasedSymbol: resolveAlias,
+            getEmitResolver: getEmitResolver,
+            getExportsOfModule: getExportsOfModuleAsArray,
+            getExportsAndPropertiesOfModule: getExportsAndPropertiesOfModule,
+            getSymbolWalker: ts.createGetSymbolWalker(getRestTypeOfSignature, getTypePredicateOfSignature, getReturnTypeOfSignature, getBaseTypes, resolveStructuredTypeMembers, getTypeOfSymbol, getResolvedSymbol, getIndexTypeOfStructuredType, getConstraintFromTypeParameter, getFirstIdentifier),
+            getAmbientModules: getAmbientModules,
+            getAllAttributesTypeFromJsxOpeningLikeElement: function (nodeIn) {
+                var node = ts.getParseTreeNode(nodeIn, ts.isJsxOpeningLikeElement);
+                return node ? getAllAttributesTypeFromJsxOpeningLikeElement(node) : undefined;
+            },
+            getJsxIntrinsicTagNamesAt: getJsxIntrinsicTagNamesAt,
+            isOptionalParameter: function (nodeIn) {
+                var node = ts.getParseTreeNode(nodeIn, ts.isParameter);
+                return node ? isOptionalParameter(node) : false;
+            },
+            tryGetMemberInModuleExports: function (name, symbol) { return tryGetMemberInModuleExports(ts.escapeLeadingUnderscores(name), symbol); },
+            tryGetMemberInModuleExportsAndProperties: function (name, symbol) { return tryGetMemberInModuleExportsAndProperties(ts.escapeLeadingUnderscores(name), symbol); },
+            tryFindAmbientModuleWithoutAugmentations: function (moduleName) {
+                // we deliberately exclude augmentations
+                // since we are only interested in declarations of the module itself
+                return tryFindAmbientModule(moduleName, /*withAugmentations*/ false);
+            },
+            getApparentType: getApparentType,
+            getUnionType: getUnionType,
+            createAnonymousType: createAnonymousType,
+            createSignature: createSignature,
+            createSymbol: createSymbol,
+            createIndexInfo: createIndexInfo,
+            getAnyType: function () { return anyType; },
+            getStringType: function () { return stringType; },
+            getNumberType: function () { return numberType; },
+            createPromiseType: createPromiseType,
+            createArrayType: createArrayType,
+            getBooleanType: function () { return booleanType; },
+            getFalseType: function () { return falseType; },
+            getTrueType: function () { return trueType; },
+            getVoidType: function () { return voidType; },
+            getUndefinedType: function () { return undefinedType; },
+            getNullType: function () { return nullType; },
+            getESSymbolType: function () { return esSymbolType; },
+            getNeverType: function () { return neverType; },
+            isSymbolAccessible: isSymbolAccessible,
+            isArrayLikeType: isArrayLikeType,
+            getAllPossiblePropertiesOfTypes: getAllPossiblePropertiesOfTypes,
+            getSuggestionForNonexistentProperty: function (node, type) { return getSuggestionForNonexistentProperty(node, type); },
+            getSuggestionForNonexistentSymbol: function (location, name, meaning) { return getSuggestionForNonexistentSymbol(location, ts.escapeLeadingUnderscores(name), meaning); },
+            getSuggestionForNonexistentModule: function (node, target) { return getSuggestionForNonexistentModule(node, target); },
+            getBaseConstraintOfType: getBaseConstraintOfType,
+            getDefaultFromTypeParameter: function (type) { return type && type.flags & 65536 /* TypeParameter */ ? getDefaultFromTypeParameter(type) : undefined; },
+            resolveName: function (name, location, meaning, excludeGlobals) {
+                return resolveName(location, ts.escapeLeadingUnderscores(name), meaning, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined, /*isUse*/ false, excludeGlobals);
+            },
+            getJsxNamespace: function (n) { return ts.unescapeLeadingUnderscores(getJsxNamespace(n)); },
+            getAccessibleSymbolChain: getAccessibleSymbolChain,
+            getTypePredicateOfSignature: getTypePredicateOfSignature,
+            resolveExternalModuleSymbol: resolveExternalModuleSymbol,
+            tryGetThisTypeAt: function (node) {
+                node = ts.getParseTreeNode(node);
+                return node && tryGetThisTypeAt(node);
+            },
+            getTypeArgumentConstraint: function (nodeIn) {
+                var node = ts.getParseTreeNode(nodeIn, ts.isTypeNode);
+                return node && getTypeArgumentConstraint(node);
+            },
+            getSuggestionDiagnostics: function (file, ct) {
+                var diagnostics;
+                try {
+                    // Record the cancellation token so it can be checked later on during checkSourceElement.
+                    // Do this in a finally block so we can ensure that it gets reset back to nothing after
+                    // this call is done.
+                    cancellationToken = ct;
+                    // Ensure file is type checked
+                    checkSourceFile(file);
+                    ts.Debug.assert(!!(getNodeLinks(file).flags & 1 /* TypeChecked */));
+                    diagnostics = ts.addRange(diagnostics, suggestionDiagnostics.get(file.fileName));
+                    if (!file.isDeclarationFile && (!unusedIsError(0 /* Local */) || !unusedIsError(1 /* Parameter */))) {
+                        addUnusedDiagnostics();
+                    }
+                    return diagnostics || ts.emptyArray;
+                }
+                finally {
+                    cancellationToken = undefined;
+                }
+                function addUnusedDiagnostics() {
+                    checkUnusedIdentifiers(getPotentiallyUnusedIdentifiers(file), function (kind, diag) {
+                        if (!unusedIsError(kind)) {
+                            (diagnostics || (diagnostics = [])).push(__assign({}, diag, { category: ts.DiagnosticCategory.Suggestion }));
+                        }
+                    });
+                }
+            },
+            runWithCancellationToken: function (token, callback) {
+                try {
+                    cancellationToken = token;
+                    return callback(checker);
+                }
+                finally {
+                    cancellationToken = undefined;
+                }
+            }
+        };
+        var tupleTypes = [];
+        var unionTypes = ts.createMap();
+        var intersectionTypes = ts.createMap();
+        var literalTypes = ts.createMap();
+        var indexedAccessTypes = ts.createMap();
+        var evolvingArrayTypes = [];
+        var undefinedProperties = ts.createMap();
+        var unknownSymbol = createSymbol(4 /* Property */, "unknown");
+        var resolvingSymbol = createSymbol(0, "__resolving__" /* Resolving */);
+        var anyType = createIntrinsicType(1 /* Any */, "any");
+        var autoType = createIntrinsicType(1 /* Any */, "any");
+        var wildcardType = createIntrinsicType(1 /* Any */, "any");
+        var errorType = createIntrinsicType(1 /* Any */, "error");
+        var unknownType = createIntrinsicType(2 /* Unknown */, "unknown");
+        var undefinedType = createIntrinsicType(8192 /* Undefined */, "undefined");
+        var undefinedWideningType = strictNullChecks ? undefinedType : createIntrinsicType(8192 /* Undefined */ | 134217728 /* ContainsWideningType */, "undefined");
+        var nullType = createIntrinsicType(16384 /* Null */, "null");
+        var nullWideningType = strictNullChecks ? nullType : createIntrinsicType(16384 /* Null */ | 134217728 /* ContainsWideningType */, "null");
+        var stringType = createIntrinsicType(4 /* String */, "string");
+        var numberType = createIntrinsicType(8 /* Number */, "number");
+        var falseType = createIntrinsicType(256 /* BooleanLiteral */, "false");
+        var trueType = createIntrinsicType(256 /* BooleanLiteral */, "true");
+        var booleanType = createBooleanType([falseType, trueType]);
+        var esSymbolType = createIntrinsicType(1024 /* ESSymbol */, "symbol");
+        var voidType = createIntrinsicType(4096 /* Void */, "void");
+        var neverType = createIntrinsicType(32768 /* Never */, "never");
+        var silentNeverType = createIntrinsicType(32768 /* Never */, "never");
+        var implicitNeverType = createIntrinsicType(32768 /* Never */, "never");
+        var nonPrimitiveType = createIntrinsicType(16777216 /* NonPrimitive */, "object");
+        var stringNumberSymbolType = getUnionType([stringType, numberType, esSymbolType]);
+        var keyofConstraintType = keyofStringsOnly ? stringType : stringNumberSymbolType;
+        var emptyObjectType = createAnonymousType(undefined, emptySymbols, ts.emptyArray, ts.emptyArray, undefined, undefined);
+        var emptyTypeLiteralSymbol = createSymbol(2048 /* TypeLiteral */, "__type" /* Type */);
+        emptyTypeLiteralSymbol.members = ts.createSymbolTable();
+        var emptyTypeLiteralType = createAnonymousType(emptyTypeLiteralSymbol, emptySymbols, ts.emptyArray, ts.emptyArray, undefined, undefined);
+        var emptyGenericType = createAnonymousType(undefined, emptySymbols, ts.emptyArray, ts.emptyArray, undefined, undefined);
+        emptyGenericType.instantiations = ts.createMap();
+        var anyFunctionType = createAnonymousType(undefined, emptySymbols, ts.emptyArray, ts.emptyArray, undefined, undefined);
+        // The anyFunctionType contains the anyFunctionType by definition. The flag is further propagated
+        // in getPropagatingFlagsOfTypes, and it is checked in inferFromTypes.
+        anyFunctionType.flags |= 536870912 /* ContainsAnyFunctionType */;
+        var noConstraintType = createAnonymousType(undefined, emptySymbols, ts.emptyArray, ts.emptyArray, undefined, undefined);
+        var circularConstraintType = createAnonymousType(undefined, emptySymbols, ts.emptyArray, ts.emptyArray, undefined, undefined);
+        var resolvingDefaultType = createAnonymousType(undefined, emptySymbols, ts.emptyArray, ts.emptyArray, undefined, undefined);
+        var markerSuperType = createType(65536 /* TypeParameter */);
+        var markerSubType = createType(65536 /* TypeParameter */);
+        markerSubType.constraint = markerSuperType;
+        var markerOtherType = createType(65536 /* TypeParameter */);
+        var noTypePredicate = createIdentifierTypePredicate("<<unresolved>>", 0, anyType);
+        var anySignature = createSignature(undefined, undefined, undefined, ts.emptyArray, anyType, /*resolvedTypePredicate*/ undefined, 0, /*hasRestParameter*/ false, /*hasLiteralTypes*/ false);
+        var unknownSignature = createSignature(undefined, undefined, undefined, ts.emptyArray, errorType, /*resolvedTypePredicate*/ undefined, 0, /*hasRestParameter*/ false, /*hasLiteralTypes*/ false);
+        var resolvingSignature = createSignature(undefined, undefined, undefined, ts.emptyArray, anyType, /*resolvedTypePredicate*/ undefined, 0, /*hasRestParameter*/ false, /*hasLiteralTypes*/ false);
+        var silentNeverSignature = createSignature(undefined, undefined, undefined, ts.emptyArray, silentNeverType, /*resolvedTypePredicate*/ undefined, 0, /*hasRestParameter*/ false, /*hasLiteralTypes*/ false);
+        var resolvingSignaturesArray = [resolvingSignature];
+        var enumNumberIndexInfo = createIndexInfo(stringType, /*isReadonly*/ true);
+        var jsObjectLiteralIndexInfo = createIndexInfo(anyType, /*isReadonly*/ false);
+        var globals = ts.createSymbolTable();
+        var reverseMappedCache = ts.createMap();
+        var ambientModulesCache;
+        /**
+         * List of every ambient module with a "*" wildcard.
+         * Unlike other ambient modules, these can't be stored in `globals` because symbol tables only deal with exact matches.
+         * This is only used if there is no exact match.
+         */
+        var patternAmbientModules;
+        var globalObjectType;
+        var globalFunctionType;
+        var globalArrayType;
+        var globalReadonlyArrayType;
+        var globalStringType;
+        var globalNumberType;
+        var globalBooleanType;
+        var globalRegExpType;
+        var globalThisType;
+        var anyArrayType;
+        var autoArrayType;
+        var anyReadonlyArrayType;
+        var deferredGlobalNonNullableTypeAlias;
+        // The library files are only loaded when the feature is used.
+        // This allows users to just specify library files they want to used through --lib
+        // and they will not get an error from not having unrelated library files
+        var deferredGlobalESSymbolConstructorSymbol;
+        var deferredGlobalESSymbolType;
+        var deferredGlobalTypedPropertyDescriptorType;
+        var deferredGlobalPromiseType;
+        var deferredGlobalPromiseConstructorSymbol;
+        var deferredGlobalPromiseConstructorLikeType;
+        var deferredGlobalIterableType;
+        var deferredGlobalIteratorType;
+        var deferredGlobalIterableIteratorType;
+        var deferredGlobalAsyncIterableType;
+        var deferredGlobalAsyncIteratorType;
+        var deferredGlobalAsyncIterableIteratorType;
+        var deferredGlobalTemplateStringsArrayType;
+        var deferredGlobalImportMetaType;
+        var deferredGlobalExtractSymbol;
+        var deferredNodes;
+        var allPotentiallyUnusedIdentifiers = ts.createMap(); // key is file name
+        var flowLoopStart = 0;
+        var flowLoopCount = 0;
+        var sharedFlowCount = 0;
+        var flowAnalysisDisabled = false;
+        var emptyStringType = getLiteralType("");
+        var zeroType = getLiteralType(0);
+        var resolutionTargets = [];
+        var resolutionResults = [];
+        var resolutionPropertyNames = [];
+        var suggestionCount = 0;
+        var maximumSuggestionCount = 10;
+        var mergedSymbols = [];
+        var symbolLinks = [];
+        var nodeLinks = [];
+        var flowLoopCaches = [];
+        var flowLoopNodes = [];
+        var flowLoopKeys = [];
+        var flowLoopTypes = [];
+        var sharedFlowNodes = [];
+        var sharedFlowTypes = [];
+        var potentialThisCollisions = [];
+        var potentialNewTargetCollisions = [];
+        var awaitedTypeStack = [];
+        var diagnostics = ts.createDiagnosticCollection();
+        // Suggestion diagnostics must have a file. Keyed by source file name.
+        var suggestionDiagnostics = ts.createMultiMap();
+        var TypeFacts;
+        (function (TypeFacts) {
+            TypeFacts[TypeFacts["None"] = 0] = "None";
+            TypeFacts[TypeFacts["TypeofEQString"] = 1] = "TypeofEQString";
+            TypeFacts[TypeFacts["TypeofEQNumber"] = 2] = "TypeofEQNumber";
+            TypeFacts[TypeFacts["TypeofEQBoolean"] = 4] = "TypeofEQBoolean";
+            TypeFacts[TypeFacts["TypeofEQSymbol"] = 8] = "TypeofEQSymbol";
+            TypeFacts[TypeFacts["TypeofEQObject"] = 16] = "TypeofEQObject";
+            TypeFacts[TypeFacts["TypeofEQFunction"] = 32] = "TypeofEQFunction";
+            TypeFacts[TypeFacts["TypeofEQHostObject"] = 64] = "TypeofEQHostObject";
+            TypeFacts[TypeFacts["TypeofNEString"] = 128] = "TypeofNEString";
+            TypeFacts[TypeFacts["TypeofNENumber"] = 256] = "TypeofNENumber";
+            TypeFacts[TypeFacts["TypeofNEBoolean"] = 512] = "TypeofNEBoolean";
+            TypeFacts[TypeFacts["TypeofNESymbol"] = 1024] = "TypeofNESymbol";
+            TypeFacts[TypeFacts["TypeofNEObject"] = 2048] = "TypeofNEObject";
+            TypeFacts[TypeFacts["TypeofNEFunction"] = 4096] = "TypeofNEFunction";
+            TypeFacts[TypeFacts["TypeofNEHostObject"] = 8192] = "TypeofNEHostObject";
+            TypeFacts[TypeFacts["EQUndefined"] = 16384] = "EQUndefined";
+            TypeFacts[TypeFacts["EQNull"] = 32768] = "EQNull";
+            TypeFacts[TypeFacts["EQUndefinedOrNull"] = 65536] = "EQUndefinedOrNull";
+            TypeFacts[TypeFacts["NEUndefined"] = 131072] = "NEUndefined";
+            TypeFacts[TypeFacts["NENull"] = 262144] = "NENull";
+            TypeFacts[TypeFacts["NEUndefinedOrNull"] = 524288] = "NEUndefinedOrNull";
+            TypeFacts[TypeFacts["Truthy"] = 1048576] = "Truthy";
+            TypeFacts[TypeFacts["Falsy"] = 2097152] = "Falsy";
+            TypeFacts[TypeFacts["All"] = 4194303] = "All";
+            // The following members encode facts about particular kinds of types for use in the getTypeFacts function.
+            // The presence of a particular fact means that the given test is true for some (and possibly all) values
+            // of that kind of type.
+            TypeFacts[TypeFacts["BaseStringStrictFacts"] = 933633] = "BaseStringStrictFacts";
+            TypeFacts[TypeFacts["BaseStringFacts"] = 3145473] = "BaseStringFacts";
+            TypeFacts[TypeFacts["StringStrictFacts"] = 4079361] = "StringStrictFacts";
+            TypeFacts[TypeFacts["StringFacts"] = 4194049] = "StringFacts";
+            TypeFacts[TypeFacts["EmptyStringStrictFacts"] = 3030785] = "EmptyStringStrictFacts";
+            TypeFacts[TypeFacts["EmptyStringFacts"] = 3145473] = "EmptyStringFacts";
+            TypeFacts[TypeFacts["NonEmptyStringStrictFacts"] = 1982209] = "NonEmptyStringStrictFacts";
+            TypeFacts[TypeFacts["NonEmptyStringFacts"] = 4194049] = "NonEmptyStringFacts";
+            TypeFacts[TypeFacts["BaseNumberStrictFacts"] = 933506] = "BaseNumberStrictFacts";
+            TypeFacts[TypeFacts["BaseNumberFacts"] = 3145346] = "BaseNumberFacts";
+            TypeFacts[TypeFacts["NumberStrictFacts"] = 4079234] = "NumberStrictFacts";
+            TypeFacts[TypeFacts["NumberFacts"] = 4193922] = "NumberFacts";
+            TypeFacts[TypeFacts["ZeroStrictFacts"] = 3030658] = "ZeroStrictFacts";
+            TypeFacts[TypeFacts["ZeroFacts"] = 3145346] = "ZeroFacts";
+            TypeFacts[TypeFacts["NonZeroStrictFacts"] = 1982082] = "NonZeroStrictFacts";
+            TypeFacts[TypeFacts["NonZeroFacts"] = 4193922] = "NonZeroFacts";
+            TypeFacts[TypeFacts["BaseBooleanStrictFacts"] = 933252] = "BaseBooleanStrictFacts";
+            TypeFacts[TypeFacts["BaseBooleanFacts"] = 3145092] = "BaseBooleanFacts";
+            TypeFacts[TypeFacts["BooleanStrictFacts"] = 4078980] = "BooleanStrictFacts";
+            TypeFacts[TypeFacts["BooleanFacts"] = 4193668] = "BooleanFacts";
+            TypeFacts[TypeFacts["FalseStrictFacts"] = 3030404] = "FalseStrictFacts";
+            TypeFacts[TypeFacts["FalseFacts"] = 3145092] = "FalseFacts";
+            TypeFacts[TypeFacts["TrueStrictFacts"] = 1981828] = "TrueStrictFacts";
+            TypeFacts[TypeFacts["TrueFacts"] = 4193668] = "TrueFacts";
+            TypeFacts[TypeFacts["SymbolStrictFacts"] = 1981320] = "SymbolStrictFacts";
+            TypeFacts[TypeFacts["SymbolFacts"] = 4193160] = "SymbolFacts";
+            TypeFacts[TypeFacts["ObjectStrictFacts"] = 1972176] = "ObjectStrictFacts";
+            TypeFacts[TypeFacts["ObjectFacts"] = 4184016] = "ObjectFacts";
+            TypeFacts[TypeFacts["FunctionStrictFacts"] = 1970144] = "FunctionStrictFacts";
+            TypeFacts[TypeFacts["FunctionFacts"] = 4181984] = "FunctionFacts";
+            TypeFacts[TypeFacts["UndefinedFacts"] = 2457472] = "UndefinedFacts";
+            TypeFacts[TypeFacts["NullFacts"] = 2340752] = "NullFacts";
+        })(TypeFacts || (TypeFacts = {}));
+        var typeofEQFacts = ts.createMapFromTemplate({
+            string: 1 /* TypeofEQString */,
+            number: 2 /* TypeofEQNumber */,
+            boolean: 4 /* TypeofEQBoolean */,
+            symbol: 8 /* TypeofEQSymbol */,
+            undefined: 16384 /* EQUndefined */,
+            object: 16 /* TypeofEQObject */,
+            function: 32 /* TypeofEQFunction */
+        });
+        var typeofNEFacts = ts.createMapFromTemplate({
+            string: 128 /* TypeofNEString */,
+            number: 256 /* TypeofNENumber */,
+            boolean: 512 /* TypeofNEBoolean */,
+            symbol: 1024 /* TypeofNESymbol */,
+            undefined: 131072 /* NEUndefined */,
+            object: 2048 /* TypeofNEObject */,
+            function: 4096 /* TypeofNEFunction */
+        });
+        var typeofTypesByName = ts.createMapFromTemplate({
+            string: stringType,
+            number: numberType,
+            boolean: booleanType,
+            symbol: esSymbolType,
+            undefined: undefinedType
+        });
+        var typeofType = createTypeofType();
+        var _jsxNamespace;
+        var _jsxFactoryEntity;
+        var subtypeRelation = ts.createMap();
+        var assignableRelation = ts.createMap();
+        var definitelyAssignableRelation = ts.createMap();
+        var comparableRelation = ts.createMap();
+        var identityRelation = ts.createMap();
+        var enumRelation = ts.createMap();
+        var TypeSystemPropertyName;
+        (function (TypeSystemPropertyName) {
+            TypeSystemPropertyName[TypeSystemPropertyName["Type"] = 0] = "Type";
+            TypeSystemPropertyName[TypeSystemPropertyName["ResolvedBaseConstructorType"] = 1] = "ResolvedBaseConstructorType";
+            TypeSystemPropertyName[TypeSystemPropertyName["DeclaredType"] = 2] = "DeclaredType";
+            TypeSystemPropertyName[TypeSystemPropertyName["ResolvedReturnType"] = 3] = "ResolvedReturnType";
+            TypeSystemPropertyName[TypeSystemPropertyName["ResolvedBaseConstraint"] = 4] = "ResolvedBaseConstraint";
+        })(TypeSystemPropertyName || (TypeSystemPropertyName = {}));
+        var CheckMode;
+        (function (CheckMode) {
+            CheckMode[CheckMode["Normal"] = 0] = "Normal";
+            CheckMode[CheckMode["SkipContextSensitive"] = 1] = "SkipContextSensitive";
+            CheckMode[CheckMode["Inferential"] = 2] = "Inferential";
+            CheckMode[CheckMode["Contextual"] = 3] = "Contextual";
+        })(CheckMode || (CheckMode = {}));
+        var CallbackCheck;
+        (function (CallbackCheck) {
+            CallbackCheck[CallbackCheck["None"] = 0] = "None";
+            CallbackCheck[CallbackCheck["Bivariant"] = 1] = "Bivariant";
+            CallbackCheck[CallbackCheck["Strict"] = 2] = "Strict";
+        })(CallbackCheck || (CallbackCheck = {}));
+        var MappedTypeModifiers;
+        (function (MappedTypeModifiers) {
+            MappedTypeModifiers[MappedTypeModifiers["IncludeReadonly"] = 1] = "IncludeReadonly";
+            MappedTypeModifiers[MappedTypeModifiers["ExcludeReadonly"] = 2] = "ExcludeReadonly";
+            MappedTypeModifiers[MappedTypeModifiers["IncludeOptional"] = 4] = "IncludeOptional";
+            MappedTypeModifiers[MappedTypeModifiers["ExcludeOptional"] = 8] = "ExcludeOptional";
+        })(MappedTypeModifiers || (MappedTypeModifiers = {}));
+        var ExpandingFlags;
+        (function (ExpandingFlags) {
+            ExpandingFlags[ExpandingFlags["None"] = 0] = "None";
+            ExpandingFlags[ExpandingFlags["Source"] = 1] = "Source";
+            ExpandingFlags[ExpandingFlags["Target"] = 2] = "Target";
+            ExpandingFlags[ExpandingFlags["Both"] = 3] = "Both";
+        })(ExpandingFlags || (ExpandingFlags = {}));
+        var MembersOrExportsResolutionKind;
+        (function (MembersOrExportsResolutionKind) {
+            MembersOrExportsResolutionKind["resolvedExports"] = "resolvedExports";
+            MembersOrExportsResolutionKind["resolvedMembers"] = "resolvedMembers";
+        })(MembersOrExportsResolutionKind || (MembersOrExportsResolutionKind = {}));
+        var UnusedKind;
+        (function (UnusedKind) {
+            UnusedKind[UnusedKind["Local"] = 0] = "Local";
+            UnusedKind[UnusedKind["Parameter"] = 1] = "Parameter";
+        })(UnusedKind || (UnusedKind = {}));
+        var builtinGlobals = ts.createSymbolTable();
+        builtinGlobals.set(undefinedSymbol.escapedName, undefinedSymbol);
+        var isNotOverloadAndNotAccessor = ts.and(isNotOverload, isNotAccessor);
+        initializeTypeChecker();
+        return checker;
+        /**
+         * @deprecated
+         */
+        function getSymbolDisplayBuilder() {
+            return {
+                buildTypeDisplay: function (type, writer, enclosingDeclaration, flags) {
+                    typeToString(type, enclosingDeclaration, flags, emitTextWriterWrapper(writer));
+                },
+                buildSymbolDisplay: function (symbol, writer, enclosingDeclaration, meaning, flags) {
+                    if (flags === void 0) { flags = 0 /* None */; }
+                    symbolToString(symbol, enclosingDeclaration, meaning, flags | 4 /* AllowAnyNodeKind */, emitTextWriterWrapper(writer));
+                },
+                buildSignatureDisplay: function (signature, writer, enclosing, flags, kind) {
+                    signatureToString(signature, enclosing, flags, kind, emitTextWriterWrapper(writer));
+                },
+                buildIndexSignatureDisplay: function (info, writer, kind, enclosing, flags) {
+                    var sig = nodeBuilder.indexInfoToIndexSignatureDeclaration(info, kind, enclosing, toNodeBuilderFlags(flags) | 3112960 /* IgnoreErrors */, writer);
+                    var printer = ts.createPrinter({ removeComments: true });
+                    printer.writeNode(4 /* Unspecified */, sig, ts.getSourceFileOfNode(ts.getParseTreeNode(enclosing)), emitTextWriterWrapper(writer));
+                },
+                buildParameterDisplay: function (symbol, writer, enclosing, flags) {
+                    var node = nodeBuilder.symbolToParameterDeclaration(symbol, enclosing, toNodeBuilderFlags(flags) | 3112960 /* IgnoreErrors */, writer);
+                    var printer = ts.createPrinter({ removeComments: true });
+                    printer.writeNode(4 /* Unspecified */, node, ts.getSourceFileOfNode(ts.getParseTreeNode(enclosing)), emitTextWriterWrapper(writer)); // TODO: GH#18217
+                },
+                buildTypeParameterDisplay: function (tp, writer, enclosing, flags) {
+                    var node = nodeBuilder.typeParameterToDeclaration(tp, enclosing, toNodeBuilderFlags(flags) | 3112960 /* IgnoreErrors */ | 8192 /* OmitParameterModifiers */, writer);
+                    var printer = ts.createPrinter({ removeComments: true });
+                    printer.writeNode(4 /* Unspecified */, node, ts.getSourceFileOfNode(ts.getParseTreeNode(enclosing)), emitTextWriterWrapper(writer)); // TODO: GH#18217
+                },
+                buildTypePredicateDisplay: function (predicate, writer, enclosing, flags) {
+                    typePredicateToString(predicate, enclosing, flags, emitTextWriterWrapper(writer));
+                },
+                buildTypeParameterDisplayFromSymbol: function (symbol, writer, enclosing, flags) {
+                    var nodes = nodeBuilder.symbolToTypeParameterDeclarations(symbol, enclosing, toNodeBuilderFlags(flags) | 3112960 /* IgnoreErrors */, writer);
+                    var printer = ts.createPrinter({ removeComments: true });
+                    printer.writeList(26896 /* TypeParameters */, nodes, ts.getSourceFileOfNode(ts.getParseTreeNode(enclosing)), emitTextWriterWrapper(writer));
+                },
+                buildDisplayForParametersAndDelimiters: function (thisParameter, parameters, writer, enclosing, originalFlags) {
+                    var printer = ts.createPrinter({ removeComments: true });
+                    var flags = 8192 /* OmitParameterModifiers */ | 3112960 /* IgnoreErrors */ | toNodeBuilderFlags(originalFlags);
+                    var thisParameterArray = thisParameter ? [nodeBuilder.symbolToParameterDeclaration(thisParameter, enclosing, flags)] : []; // TODO: GH#18217
+                    var params = ts.createNodeArray(thisParameterArray.concat(ts.map(parameters, function (param) { return nodeBuilder.symbolToParameterDeclaration(param, enclosing, flags); }))); // TODO: GH#18217
+                    printer.writeList(1296 /* CallExpressionArguments */, params, ts.getSourceFileOfNode(ts.getParseTreeNode(enclosing)), emitTextWriterWrapper(writer));
+                },
+                buildDisplayForTypeParametersAndDelimiters: function (typeParameters, writer, enclosing, flags) {
+                    var printer = ts.createPrinter({ removeComments: true });
+                    var args = ts.createNodeArray(ts.map(typeParameters, function (p) { return nodeBuilder.typeParameterToDeclaration(p, enclosing, toNodeBuilderFlags(flags)); })); // TODO: GH#18217
+                    printer.writeList(26896 /* TypeParameters */, args, ts.getSourceFileOfNode(ts.getParseTreeNode(enclosing)), emitTextWriterWrapper(writer));
+                },
+                buildReturnTypeDisplay: function (signature, writer, enclosing, flags) {
+                    writer.writePunctuation(":");
+                    writer.writeSpace(" ");
+                    var predicate = getTypePredicateOfSignature(signature);
+                    if (predicate) {
+                        return typePredicateToString(predicate, enclosing, flags, emitTextWriterWrapper(writer));
+                    }
+                    var node = nodeBuilder.typeToTypeNode(getReturnTypeOfSignature(signature), enclosing, toNodeBuilderFlags(flags) | 3112960 /* IgnoreErrors */, writer);
+                    var printer = ts.createPrinter({ removeComments: true });
+                    printer.writeNode(4 /* Unspecified */, node, ts.getSourceFileOfNode(ts.getParseTreeNode(enclosing)), emitTextWriterWrapper(writer)); // TODO: GH#18217
+                }
+            };
+            function emitTextWriterWrapper(underlying) {
+                return {
+                    write: ts.noop,
+                    writeTextOfNode: ts.noop,
+                    writeLine: ts.noop,
+                    increaseIndent: function () {
+                        return underlying.increaseIndent();
+                    },
+                    decreaseIndent: function () {
+                        return underlying.decreaseIndent();
+                    },
+                    getText: function () {
+                        return "";
+                    },
+                    rawWrite: ts.noop,
+                    writeLiteral: function (s) {
+                        return underlying.writeStringLiteral(s);
+                    },
+                    getTextPos: function () {
+                        return 0;
+                    },
+                    getLine: function () {
+                        return 0;
+                    },
+                    getColumn: function () {
+                        return 0;
+                    },
+                    getIndent: function () {
+                        return 0;
+                    },
+                    isAtStartOfLine: function () {
+                        return false;
+                    },
+                    clear: function () {
+                        return underlying.clear();
+                    },
+                    writeKeyword: function (text) {
+                        return underlying.writeKeyword(text);
+                    },
+                    writeOperator: function (text) {
+                        return underlying.writeOperator(text);
+                    },
+                    writePunctuation: function (text) {
+                        return underlying.writePunctuation(text);
+                    },
+                    writeSpace: function (text) {
+                        return underlying.writeSpace(text);
+                    },
+                    writeStringLiteral: function (text) {
+                        return underlying.writeStringLiteral(text);
+                    },
+                    writeParameter: function (text) {
+                        return underlying.writeParameter(text);
+                    },
+                    writeProperty: function (text) {
+                        return underlying.writeProperty(text);
+                    },
+                    writeSymbol: function (text, symbol) {
+                        return underlying.writeSymbol(text, symbol);
+                    },
+                    trackSymbol: function (symbol, enclosing, meaning) {
+                        return underlying.trackSymbol && underlying.trackSymbol(symbol, enclosing, meaning);
+                    },
+                    reportInaccessibleThisError: function () {
+                        return underlying.reportInaccessibleThisError && underlying.reportInaccessibleThisError();
+                    },
+                    reportPrivateInBaseOfClassExpression: function (name) {
+                        return underlying.reportPrivateInBaseOfClassExpression && underlying.reportPrivateInBaseOfClassExpression(name);
+                    },
+                    reportInaccessibleUniqueSymbolError: function () {
+                        return underlying.reportInaccessibleUniqueSymbolError && underlying.reportInaccessibleUniqueSymbolError();
+                    }
+                };
+            }
+        }
+        function getJsxNamespace(location) {
+            if (location) {
+                var file = ts.getSourceFileOfNode(location);
+                if (file) {
+                    if (file.localJsxNamespace) {
+                        return file.localJsxNamespace;
+                    }
+                    var jsxPragma = file.pragmas.get("jsx");
+                    if (jsxPragma) {
+                        var chosenpragma = ts.isArray(jsxPragma) ? jsxPragma[0] : jsxPragma; // TODO: GH#18217
+                        file.localJsxFactory = ts.parseIsolatedEntityName(chosenpragma.arguments.factory, languageVersion);
+                        if (file.localJsxFactory) {
+                            return file.localJsxNamespace = getFirstIdentifier(file.localJsxFactory).escapedText;
+                        }
+                    }
+                }
+            }
+            if (!_jsxNamespace) {
+                _jsxNamespace = "React";
+                if (compilerOptions.jsxFactory) {
+                    _jsxFactoryEntity = ts.parseIsolatedEntityName(compilerOptions.jsxFactory, languageVersion);
+                    if (_jsxFactoryEntity) {
+                        _jsxNamespace = getFirstIdentifier(_jsxFactoryEntity).escapedText;
+                    }
+                }
+                else if (compilerOptions.reactNamespace) {
+                    _jsxNamespace = ts.escapeLeadingUnderscores(compilerOptions.reactNamespace);
+                }
+            }
+            return _jsxNamespace;
+        }
+        function getEmitResolver(sourceFile, cancellationToken) {
+            // Ensure we have all the type information in place for this file so that all the
+            // emitter questions of this resolver will return the right information.
+            getDiagnostics(sourceFile, cancellationToken);
+            return emitResolver;
+        }
+        function error(location, message, arg0, arg1, arg2, arg3) {
+            var diagnostic = location
+                ? ts.createDiagnosticForNode(location, message, arg0, arg1, arg2, arg3)
+                : ts.createCompilerDiagnostic(message, arg0, arg1, arg2, arg3);
+            diagnostics.add(diagnostic);
+        }
+        function addErrorOrSuggestion(isError, diagnostic) {
+            if (isError) {
+                diagnostics.add(diagnostic);
+            }
+            else {
+                suggestionDiagnostics.add(diagnostic.file.fileName, __assign({}, diagnostic, { category: ts.DiagnosticCategory.Suggestion }));
+            }
+        }
+        function errorOrSuggestion(isError, location, message, arg0, arg1, arg2, arg3) {
+            addErrorOrSuggestion(isError, "message" in message ? ts.createDiagnosticForNode(location, message, arg0, arg1, arg2, arg3) : ts.createDiagnosticForNodeFromMessageChain(location, message));
+        }
+        function createSymbol(flags, name, checkFlags) {
+            symbolCount++;
+            var symbol = (new Symbol(flags | 33554432 /* Transient */, name));
+            symbol.checkFlags = checkFlags || 0;
+            return symbol;
+        }
+        function isTransientSymbol(symbol) {
+            return (symbol.flags & 33554432 /* Transient */) !== 0;
+        }
+        function getExcludedSymbolFlags(flags) {
+            var result = 0;
+            if (flags & 2 /* BlockScopedVariable */)
+                result |= 67216319 /* BlockScopedVariableExcludes */;
+            if (flags & 1 /* FunctionScopedVariable */)
+                result |= 67216318 /* FunctionScopedVariableExcludes */;
+            if (flags & 4 /* Property */)
+                result |= 0 /* PropertyExcludes */;
+            if (flags & 8 /* EnumMember */)
+                result |= 68008959 /* EnumMemberExcludes */;
+            if (flags & 16 /* Function */)
+                result |= 67215791 /* FunctionExcludes */;
+            if (flags & 32 /* Class */)
+                result |= 68008383 /* ClassExcludes */;
+            if (flags & 64 /* Interface */)
+                result |= 67901832 /* InterfaceExcludes */;
+            if (flags & 256 /* RegularEnum */)
+                result |= 68008191 /* RegularEnumExcludes */;
+            if (flags & 128 /* ConstEnum */)
+                result |= 68008831 /* ConstEnumExcludes */;
+            if (flags & 512 /* ValueModule */)
+                result |= 67215503 /* ValueModuleExcludes */;
+            if (flags & 8192 /* Method */)
+                result |= 67208127 /* MethodExcludes */;
+            if (flags & 32768 /* GetAccessor */)
+                result |= 67150783 /* GetAccessorExcludes */;
+            if (flags & 65536 /* SetAccessor */)
+                result |= 67183551 /* SetAccessorExcludes */;
+            if (flags & 262144 /* TypeParameter */)
+                result |= 67639784 /* TypeParameterExcludes */;
+            if (flags & 524288 /* TypeAlias */)
+                result |= 67901928 /* TypeAliasExcludes */;
+            if (flags & 2097152 /* Alias */)
+                result |= 2097152 /* AliasExcludes */;
+            return result;
+        }
+        function recordMergedSymbol(target, source) {
+            if (!source.mergeId) {
+                source.mergeId = nextMergeId;
+                nextMergeId++;
+            }
+            mergedSymbols[source.mergeId] = target;
+        }
+        function cloneSymbol(symbol) {
+            var result = createSymbol(symbol.flags, symbol.escapedName);
+            result.declarations = symbol.declarations ? symbol.declarations.slice() : [];
+            result.parent = symbol.parent;
+            if (symbol.valueDeclaration)
+                result.valueDeclaration = symbol.valueDeclaration;
+            if (symbol.constEnumOnlyModule)
+                result.constEnumOnlyModule = true;
+            if (symbol.members)
+                result.members = ts.cloneMap(symbol.members);
+            if (symbol.exports)
+                result.exports = ts.cloneMap(symbol.exports);
+            recordMergedSymbol(result, symbol);
+            return result;
+        }
+        /**
+         * Note: if target is transient, then it is mutable, and mergeSymbol with both mutate and return it.
+         * If target is not transient, mergeSymbol will produce a transient clone, mutate that and return it.
+         */
+        function mergeSymbol(target, source) {
+            if (!(target.flags & getExcludedSymbolFlags(source.flags)) ||
+                (source.flags | target.flags) & 67108864 /* JSContainer */) {
+                ts.Debug.assert(source !== target);
+                if (!(target.flags & 33554432 /* Transient */)) {
+                    target = cloneSymbol(target);
+                }
+                // Javascript static-property-assignment declarations always merge, even though they are also values
+                if (source.flags & 512 /* ValueModule */ && target.flags & 512 /* ValueModule */ && target.constEnumOnlyModule && !source.constEnumOnlyModule) {
+                    // reset flag when merging instantiated module into value module that has only const enums
+                    target.constEnumOnlyModule = false;
+                }
+                target.flags |= source.flags;
+                if (source.valueDeclaration &&
+                    (!target.valueDeclaration ||
+                        ts.isEffectiveModuleDeclaration(target.valueDeclaration) && !ts.isEffectiveModuleDeclaration(source.valueDeclaration))) {
+                    // other kinds of value declarations take precedence over modules
+                    target.valueDeclaration = source.valueDeclaration;
+                }
+                ts.addRange(target.declarations, source.declarations);
+                if (source.members) {
+                    if (!target.members)
+                        target.members = ts.createSymbolTable();
+                    mergeSymbolTable(target.members, source.members);
+                }
+                if (source.exports) {
+                    if (!target.exports)
+                        target.exports = ts.createSymbolTable();
+                    mergeSymbolTable(target.exports, source.exports);
+                }
+                recordMergedSymbol(target, source);
+            }
+            else if (target.flags & 1024 /* NamespaceModule */) {
+                error(ts.getNameOfDeclaration(source.declarations[0]), ts.Diagnostics.Cannot_augment_module_0_with_value_exports_because_it_resolves_to_a_non_module_entity, symbolToString(target));
+            }
+            else {
+                var message_2 = target.flags & 384 /* Enum */ || source.flags & 384 /* Enum */
+                    ? ts.Diagnostics.Enum_declarations_can_only_merge_with_namespace_or_other_enum_declarations
+                    : target.flags & 2 /* BlockScopedVariable */ || source.flags & 2 /* BlockScopedVariable */
+                        ? ts.Diagnostics.Cannot_redeclare_block_scoped_variable_0
+                        : ts.Diagnostics.Duplicate_identifier_0;
+                ts.forEach(source.declarations, function (node) {
+                    var errorNode = (ts.getJavascriptInitializer(node, /*isPrototypeAssignment*/ false) ? ts.getOuterNameOfJsInitializer(node) : ts.getNameOfDeclaration(node)) || node;
+                    error(errorNode, message_2, symbolToString(source));
+                });
+                ts.forEach(target.declarations, function (node) {
+                    var errorNode = (ts.getJavascriptInitializer(node, /*isPrototypeAssignment*/ false) ? ts.getOuterNameOfJsInitializer(node) : ts.getNameOfDeclaration(node)) || node;
+                    error(errorNode, message_2, symbolToString(source));
+                });
+            }
+            return target;
+        }
+        function combineSymbolTables(first, second) {
+            if (!ts.hasEntries(first))
+                return second;
+            if (!ts.hasEntries(second))
+                return first;
+            var combined = ts.createSymbolTable();
+            mergeSymbolTable(combined, first);
+            mergeSymbolTable(combined, second);
+            return combined;
+        }
+        function mergeSymbolTable(target, source) {
+            source.forEach(function (sourceSymbol, id) {
+                target.set(id, target.has(id) ? mergeSymbol(target.get(id), sourceSymbol) : sourceSymbol);
+            });
+        }
+        function mergeModuleAugmentation(moduleName) {
+            var moduleAugmentation = moduleName.parent;
+            if (moduleAugmentation.symbol.declarations[0] !== moduleAugmentation) {
+                // this is a combined symbol for multiple augmentations within the same file.
+                // its symbol already has accumulated information for all declarations
+                // so we need to add it just once - do the work only for first declaration
+                ts.Debug.assert(moduleAugmentation.symbol.declarations.length > 1);
+                return;
+            }
+            if (ts.isGlobalScopeAugmentation(moduleAugmentation)) {
+                mergeSymbolTable(globals, moduleAugmentation.symbol.exports);
+            }
+            else {
+                // find a module that about to be augmented
+                // do not validate names of augmentations that are defined in ambient context
+                var moduleNotFoundError = !(moduleName.parent.parent.flags & 4194304 /* Ambient */)
+                    ? ts.Diagnostics.Invalid_module_name_in_augmentation_module_0_cannot_be_found
+                    : undefined;
+                var mainModule = resolveExternalModuleNameWorker(moduleName, moduleName, moduleNotFoundError, /*isForAugmentation*/ true);
+                if (!mainModule) {
+                    return;
+                }
+                // obtain item referenced by 'export='
+                mainModule = resolveExternalModuleSymbol(mainModule);
+                if (mainModule.flags & 1920 /* Namespace */) {
+                    mainModule = mergeSymbol(mainModule, moduleAugmentation.symbol);
+                }
+                else {
+                    // moduleName will be a StringLiteral since this is not `declare global`.
+                    error(moduleName, ts.Diagnostics.Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity, moduleName.text);
+                }
+            }
+        }
+        function addToSymbolTable(target, source, message) {
+            source.forEach(function (sourceSymbol, id) {
+                var targetSymbol = target.get(id);
+                if (targetSymbol) {
+                    // Error on redeclarations
+                    ts.forEach(targetSymbol.declarations, addDeclarationDiagnostic(ts.unescapeLeadingUnderscores(id), message));
+                }
+                else {
+                    target.set(id, sourceSymbol);
+                }
+            });
+            function addDeclarationDiagnostic(id, message) {
+                return function (declaration) { return diagnostics.add(ts.createDiagnosticForNode(declaration, message, id)); };
+            }
+        }
+        function getSymbolLinks(symbol) {
+            if (symbol.flags & 33554432 /* Transient */)
+                return symbol;
+            var id = getSymbolId(symbol);
+            return symbolLinks[id] || (symbolLinks[id] = {});
+        }
+        function getNodeLinks(node) {
+            var nodeId = getNodeId(node);
+            return nodeLinks[nodeId] || (nodeLinks[nodeId] = { flags: 0 });
+        }
+        function isGlobalSourceFile(node) {
+            return node.kind === 274 /* SourceFile */ && !ts.isExternalOrCommonJsModule(node);
+        }
+        function getSymbol(symbols, name, meaning) {
+            if (meaning) {
+                var symbol = symbols.get(name);
+                if (symbol) {
+                    ts.Debug.assert((ts.getCheckFlags(symbol) & 1 /* Instantiated */) === 0, "Should never get an instantiated symbol here.");
+                    if (symbol.flags & meaning) {
+                        return symbol;
+                    }
+                    if (symbol.flags & 2097152 /* Alias */) {
+                        var target = resolveAlias(symbol);
+                        // Unknown symbol means an error occurred in alias resolution, treat it as positive answer to avoid cascading errors
+                        if (target === unknownSymbol || target.flags & meaning) {
+                            return symbol;
+                        }
+                    }
+                }
+            }
+            // return undefined if we can't find a symbol.
+        }
+        /**
+         * Get symbols that represent parameter-property-declaration as parameter and as property declaration
+         * @param parameter a parameterDeclaration node
+         * @param parameterName a name of the parameter to get the symbols for.
+         * @return a tuple of two symbols
+         */
+        function getSymbolsOfParameterPropertyDeclaration(parameter, parameterName) {
+            var constructorDeclaration = parameter.parent;
+            var classDeclaration = parameter.parent.parent;
+            var parameterSymbol = getSymbol(constructorDeclaration.locals, parameterName, 67216319 /* Value */);
+            var propertySymbol = getSymbol(getMembersOfSymbol(classDeclaration.symbol), parameterName, 67216319 /* Value */);
+            if (parameterSymbol && propertySymbol) {
+                return [parameterSymbol, propertySymbol];
+            }
+            return ts.Debug.fail("There should exist two symbols, one as property declaration and one as parameter declaration");
+        }
+        function isBlockScopedNameDeclaredBeforeUse(declaration, usage) {
+            var declarationFile = ts.getSourceFileOfNode(declaration);
+            var useFile = ts.getSourceFileOfNode(usage);
+            if (declarationFile !== useFile) {
+                if ((moduleKind && (declarationFile.externalModuleIndicator || useFile.externalModuleIndicator)) ||
+                    (!compilerOptions.outFile && !compilerOptions.out) ||
+                    isInTypeQuery(usage) ||
+                    declaration.flags & 4194304 /* Ambient */) {
+                    // nodes are in different files and order cannot be determined
+                    return true;
+                }
+                // declaration is after usage
+                // can be legal if usage is deferred (i.e. inside function or in initializer of instance property)
+                if (isUsedInFunctionOrInstanceProperty(usage, declaration)) {
+                    return true;
+                }
+                var sourceFiles = host.getSourceFiles();
+                return sourceFiles.indexOf(declarationFile) <= sourceFiles.indexOf(useFile);
+            }
+            if (declaration.pos <= usage.pos) {
+                // declaration is before usage
+                if (declaration.kind === 182 /* BindingElement */) {
+                    // still might be illegal if declaration and usage are both binding elements (eg var [a = b, b = b] = [1, 2])
+                    var errorBindingElement = ts.getAncestor(usage, 182 /* BindingElement */);
+                    if (errorBindingElement) {
+                        return ts.findAncestor(errorBindingElement, ts.isBindingElement) !== ts.findAncestor(declaration, ts.isBindingElement) ||
+                            declaration.pos < errorBindingElement.pos;
+                    }
+                    // or it might be illegal if usage happens before parent variable is declared (eg var [a] = a)
+                    return isBlockScopedNameDeclaredBeforeUse(ts.getAncestor(declaration, 232 /* VariableDeclaration */), usage);
+                }
+                else if (declaration.kind === 232 /* VariableDeclaration */) {
+                    // still might be illegal if usage is in the initializer of the variable declaration (eg var a = a)
+                    return !isImmediatelyUsedInInitializerOfBlockScopedVariable(declaration, usage);
+                }
+                else if (ts.isClassDeclaration(declaration)) {
+                    // still might be illegal if the usage is within a computed property name in the class (eg class A { static p = "a"; [A.p]() {} })
+                    return !ts.findAncestor(usage, function (n) { return ts.isComputedPropertyName(n) && n.parent.parent === declaration; });
+                }
+                return true;
+            }
+            // declaration is after usage, but it can still be legal if usage is deferred:
+            // 1. inside an export specifier
+            // 2. inside a function
+            // 3. inside an instance property initializer, a reference to a non-instance property
+            // 4. inside a static property initializer, a reference to a static method in the same class
+            // 5. inside a TS export= declaration (since we will move the export statement during emit to avoid TDZ)
+            // or if usage is in a type context:
+            // 1. inside a type query (typeof in type position)
+            if (usage.parent.kind === 252 /* ExportSpecifier */ || (usage.parent.kind === 249 /* ExportAssignment */ && usage.parent.isExportEquals)) {
+                // export specifiers do not use the variable, they only make it available for use
+                return true;
+            }
+            // When resolving symbols for exports, the `usage` location passed in can be the export site directly
+            if (usage.kind === 249 /* ExportAssignment */ && usage.isExportEquals) {
+                return true;
+            }
+            var container = ts.getEnclosingBlockScopeContainer(declaration);
+            return isInTypeQuery(usage) || isUsedInFunctionOrInstanceProperty(usage, declaration, container);
+            function isImmediatelyUsedInInitializerOfBlockScopedVariable(declaration, usage) {
+                var container = ts.getEnclosingBlockScopeContainer(declaration);
+                switch (declaration.parent.parent.kind) {
+                    case 214 /* VariableStatement */:
+                    case 220 /* ForStatement */:
+                    case 222 /* ForOfStatement */:
+                        // variable statement/for/for-of statement case,
+                        // use site should not be inside variable declaration (initializer of declaration or binding element)
+                        if (isSameScopeDescendentOf(usage, declaration, container)) {
+                            return true;
+                        }
+                        break;
+                }
+                // ForIn/ForOf case - use site should not be used in expression part
+                var grandparent = declaration.parent.parent;
+                return ts.isForInOrOfStatement(grandparent) && isSameScopeDescendentOf(usage, grandparent.expression, container);
+            }
+            function isUsedInFunctionOrInstanceProperty(usage, declaration, container) {
+                return !!ts.findAncestor(usage, function (current) {
+                    if (current === container) {
+                        return "quit";
+                    }
+                    if (ts.isFunctionLike(current)) {
+                        return true;
+                    }
+                    var initializerOfProperty = current.parent &&
+                        current.parent.kind === 152 /* PropertyDeclaration */ &&
+                        current.parent.initializer === current;
+                    if (initializerOfProperty) {
+                        if (ts.hasModifier(current.parent, 32 /* Static */)) {
+                            if (declaration.kind === 154 /* MethodDeclaration */) {
+                                return true;
+                            }
+                        }
+                        else {
+                            var isDeclarationInstanceProperty = declaration.kind === 152 /* PropertyDeclaration */ && !ts.hasModifier(declaration, 32 /* Static */);
+                            if (!isDeclarationInstanceProperty || ts.getContainingClass(usage) !== ts.getContainingClass(declaration)) {
+                                return true;
+                            }
+                        }
+                    }
+                    return false;
+                });
+            }
+        }
+        /**
+         * Resolve a given name for a given meaning at a given location. An error is reported if the name was not found and
+         * the nameNotFoundMessage argument is not undefined. Returns the resolved symbol, or undefined if no symbol with
+         * the given name can be found.
+         *
+         * @param isUse If true, this will count towards --noUnusedLocals / --noUnusedParameters.
+         */
+        function resolveName(location, name, meaning, nameNotFoundMessage, nameArg, isUse, excludeGlobals, suggestedNameNotFoundMessage) {
+            if (excludeGlobals === void 0) { excludeGlobals = false; }
+            return resolveNameHelper(location, name, meaning, nameNotFoundMessage, nameArg, isUse, excludeGlobals, getSymbol, suggestedNameNotFoundMessage);
+        }
+        function resolveNameHelper(location, name, meaning, nameNotFoundMessage, nameArg, isUse, excludeGlobals, lookup, suggestedNameNotFoundMessage) {
+            var originalLocation = location; // needed for did-you-mean error reporting, which gathers candidates starting from the original location
+            var result;
+            var lastLocation;
+            var lastSelfReferenceLocation;
+            var propertyWithInvalidInitializer;
+            var errorLocation = location;
+            var grandparent;
+            var isInExternalModule = false;
+            loop: while (location) {
+                // Locals of a source file are not in scope (because they get merged into the global symbol table)
+                if (location.locals && !isGlobalSourceFile(location)) {
+                    if (result = lookup(location.locals, name, meaning)) {
+                        var useResult = true;
+                        if (ts.isFunctionLike(location) && lastLocation && lastLocation !== location.body) {
+                            // symbol lookup restrictions for function-like declarations
+                            // - Type parameters of a function are in scope in the entire function declaration, including the parameter
+                            //   list and return type. However, local types are only in scope in the function body.
+                            // - parameters are only in the scope of function body
+                            // This restriction does not apply to JSDoc comment types because they are parented
+                            // at a higher level than type parameters would normally be
+                            if (meaning & result.flags & 67901928 /* Type */ && lastLocation.kind !== 286 /* JSDocComment */) {
+                                useResult = result.flags & 262144 /* TypeParameter */
+                                    // type parameters are visible in parameter list, return type and type parameter list
+                                    ? lastLocation === location.type ||
+                                        lastLocation.kind === 149 /* Parameter */ ||
+                                        lastLocation.kind === 148 /* TypeParameter */
+                                    // local types not visible outside the function body
+                                    : false;
+                            }
+                            if (meaning & 67216319 /* Value */ && result.flags & 1 /* FunctionScopedVariable */) {
+                                // parameters are visible only inside function body, parameter list and return type
+                                // technically for parameter list case here we might mix parameters and variables declared in function,
+                                // however it is detected separately when checking initializers of parameters
+                                // to make sure that they reference no variables declared after them.
+                                useResult =
+                                    lastLocation.kind === 149 /* Parameter */ ||
+                                        (lastLocation === location.type &&
+                                            !!ts.findAncestor(result.valueDeclaration, ts.isParameter));
+                            }
+                        }
+                        else if (location.kind === 171 /* ConditionalType */) {
+                            // A type parameter declared using 'infer T' in a conditional type is visible only in
+                            // the true branch of the conditional type.
+                            useResult = lastLocation === location.trueType;
+                        }
+                        if (useResult) {
+                            break loop;
+                        }
+                        else {
+                            result = undefined;
+                        }
+                    }
+                }
+                switch (location.kind) {
+                    case 274 /* SourceFile */:
+                        if (!ts.isExternalOrCommonJsModule(location))
+                            break;
+                        isInExternalModule = true;
+                    // falls through
+                    case 239 /* ModuleDeclaration */:
+                        var moduleExports = getSymbolOfNode(location).exports;
+                        if (location.kind === 274 /* SourceFile */ || ts.isAmbientModule(location)) {
+                            // It's an external module. First see if the module has an export default and if the local
+                            // name of that export default matches.
+                            if (result = moduleExports.get("default" /* Default */)) {
+                                var localSymbol = ts.getLocalSymbolForExportDefault(result);
+                                if (localSymbol && (result.flags & meaning) && localSymbol.escapedName === name) {
+                                    break loop;
+                                }
+                                result = undefined;
+                            }
+                            // Because of module/namespace merging, a module's exports are in scope,
+                            // yet we never want to treat an export specifier as putting a member in scope.
+                            // Therefore, if the name we find is purely an export specifier, it is not actually considered in scope.
+                            // Two things to note about this:
+                            //     1. We have to check this without calling getSymbol. The problem with calling getSymbol
+                            //        on an export specifier is that it might find the export specifier itself, and try to
+                            //        resolve it as an alias. This will cause the checker to consider the export specifier
+                            //        a circular alias reference when it might not be.
+                            //     2. We check === SymbolFlags.Alias in order to check that the symbol is *purely*
+                            //        an alias. If we used &, we'd be throwing out symbols that have non alias aspects,
+                            //        which is not the desired behavior.
+                            var moduleExport = moduleExports.get(name);
+                            if (moduleExport &&
+                                moduleExport.flags === 2097152 /* Alias */ &&
+                                ts.getDeclarationOfKind(moduleExport, 252 /* ExportSpecifier */)) {
+                                break;
+                            }
+                        }
+                        // ES6 exports are also visible locally (except for 'default'), but commonjs exports are not (except typedefs)
+                        if (name !== "default" /* Default */ && (result = lookup(moduleExports, name, meaning & 2623475 /* ModuleMember */))) {
+                            if (ts.isSourceFile(location) && location.commonJsModuleIndicator && !result.declarations.some(ts.isJSDocTypeAlias)) {
+                                result = undefined;
+                            }
+                            else {
+                                break loop;
+                            }
+                        }
+                        break;
+                    case 238 /* EnumDeclaration */:
+                        if (result = lookup(getSymbolOfNode(location).exports, name, meaning & 8 /* EnumMember */)) {
+                            break loop;
+                        }
+                        break;
+                    case 152 /* PropertyDeclaration */:
+                    case 151 /* PropertySignature */:
+                        // TypeScript 1.0 spec (April 2014): 8.4.1
+                        // Initializer expressions for instance member variables are evaluated in the scope
+                        // of the class constructor body but are not permitted to reference parameters or
+                        // local variables of the constructor. This effectively means that entities from outer scopes
+                        // by the same name as a constructor parameter or local variable are inaccessible
+                        // in initializer expressions for instance member variables.
+                        if (ts.isClassLike(location.parent) && !ts.hasModifier(location, 32 /* Static */)) {
+                            var ctor = findConstructorDeclaration(location.parent);
+                            if (ctor && ctor.locals) {
+                                if (lookup(ctor.locals, name, meaning & 67216319 /* Value */)) {
+                                    // Remember the property node, it will be used later to report appropriate error
+                                    propertyWithInvalidInitializer = location;
+                                }
+                            }
+                        }
+                        break;
+                    case 235 /* ClassDeclaration */:
+                    case 205 /* ClassExpression */:
+                    case 236 /* InterfaceDeclaration */:
+                        if (result = lookup(getMembersOfSymbol(getSymbolOfNode(location)), name, meaning & 67901928 /* Type */)) {
+                            if (!isTypeParameterSymbolDeclaredInContainer(result, location)) {
+                                // ignore type parameters not declared in this container
+                                result = undefined;
+                                break;
+                            }
+                            if (lastLocation && ts.hasModifier(lastLocation, 32 /* Static */)) {
+                                // TypeScript 1.0 spec (April 2014): 3.4.1
+                                // The scope of a type parameter extends over the entire declaration with which the type
+                                // parameter list is associated, with the exception of static member declarations in classes.
+                                error(errorLocation, ts.Diagnostics.Static_members_cannot_reference_class_type_parameters);
+                                return undefined;
+                            }
+                            break loop;
+                        }
+                        if (location.kind === 205 /* ClassExpression */ && meaning & 32 /* Class */) {
+                            var className = location.name;
+                            if (className && name === className.escapedText) {
+                                result = location.symbol;
+                                break loop;
+                            }
+                        }
+                        break;
+                    case 207 /* ExpressionWithTypeArguments */:
+                        // The type parameters of a class are not in scope in the base class expression.
+                        if (lastLocation === location.expression && location.parent.token === 85 /* ExtendsKeyword */) {
+                            var container = location.parent.parent;
+                            if (ts.isClassLike(container) && (result = lookup(getSymbolOfNode(container).members, name, meaning & 67901928 /* Type */))) {
+                                if (nameNotFoundMessage) {
+                                    error(errorLocation, ts.Diagnostics.Base_class_expressions_cannot_reference_class_type_parameters);
+                                }
+                                return undefined;
+                            }
+                        }
+                        break;
+                    // It is not legal to reference a class's own type parameters from a computed property name that
+                    // belongs to the class. For example:
+                    //
+                    //   function foo<T>() { return '' }
+                    //   class C<T> { // <-- Class's own type parameter T
+                    //       [foo<T>()]() { } // <-- Reference to T from class's own computed property
+                    //   }
+                    //
+                    case 147 /* ComputedPropertyName */:
+                        grandparent = location.parent.parent;
+                        if (ts.isClassLike(grandparent) || grandparent.kind === 236 /* InterfaceDeclaration */) {
+                            // A reference to this grandparent's type parameters would be an error
+                            if (result = lookup(getSymbolOfNode(grandparent).members, name, meaning & 67901928 /* Type */)) {
+                                error(errorLocation, ts.Diagnostics.A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type);
+                                return undefined;
+                            }
+                        }
+                        break;
+                    case 154 /* MethodDeclaration */:
+                    case 153 /* MethodSignature */:
+                    case 155 /* Constructor */:
+                    case 156 /* GetAccessor */:
+                    case 157 /* SetAccessor */:
+                    case 234 /* FunctionDeclaration */:
+                    case 193 /* ArrowFunction */:
+                        if (meaning & 3 /* Variable */ && name === "arguments") {
+                            result = argumentsSymbol;
+                            break loop;
+                        }
+                        break;
+                    case 192 /* FunctionExpression */:
+                        if (meaning & 3 /* Variable */ && name === "arguments") {
+                            result = argumentsSymbol;
+                            break loop;
+                        }
+                        if (meaning & 16 /* Function */) {
+                            var functionName = location.name;
+                            if (functionName && name === functionName.escapedText) {
+                                result = location.symbol;
+                                break loop;
+                            }
+                        }
+                        break;
+                    case 150 /* Decorator */:
+                        // Decorators are resolved at the class declaration. Resolving at the parameter
+                        // or member would result in looking up locals in the method.
+                        //
+                        //   function y() {}
+                        //   class C {
+                        //       method(@y x, y) {} // <-- decorator y should be resolved at the class declaration, not the parameter.
+                        //   }
+                        //
+                        if (location.parent && location.parent.kind === 149 /* Parameter */) {
+                            location = location.parent;
+                        }
+                        //
+                        //   function y() {}
+                        //   class C {
+                        //       @y method(x, y) {} // <-- decorator y should be resolved at the class declaration, not the method.
+                        //   }
+                        //
+                        if (location.parent && ts.isClassElement(location.parent)) {
+                            location = location.parent;
+                        }
+                        break;
+                    case 297 /* JSDocTypedefTag */:
+                    case 292 /* JSDocCallbackTag */:
+                        // js type aliases do not resolve names from their host, so skip past it
+                        location = ts.getJSDocHost(location);
+                        break;
+                }
+                if (isSelfReferenceLocation(location)) {
+                    lastSelfReferenceLocation = location;
+                }
+                lastLocation = location;
+                location = location.parent;
+            }
+            // We just climbed up parents looking for the name, meaning that we started in a descendant node of `lastLocation`.
+            // If `result === lastSelfReferenceLocation.symbol`, that means that we are somewhere inside `lastSelfReferenceLocation` looking up a name, and resolving to `lastLocation` itself.
+            // That means that this is a self-reference of `lastLocation`, and shouldn't count this when considering whether `lastLocation` is used.
+            if (isUse && result && (!lastSelfReferenceLocation || result !== lastSelfReferenceLocation.symbol)) {
+                result.isReferenced |= meaning;
+            }
+            if (!result) {
+                if (lastLocation) {
+                    ts.Debug.assert(lastLocation.kind === 274 /* SourceFile */);
+                    if (lastLocation.commonJsModuleIndicator && name === "exports") {
+                        return lastLocation.symbol;
+                    }
+                }
+                if (!excludeGlobals) {
+                    result = lookup(globals, name, meaning);
+                }
+            }
+            if (!result) {
+                if (originalLocation && ts.isInJavaScriptFile(originalLocation) && originalLocation.parent) {
+                    if (ts.isRequireCall(originalLocation.parent, /*checkArgumentIsStringLiteralLike*/ false)) {
+                        return requireSymbol;
+                    }
+                    if (ts.isIdentifier(originalLocation) && ts.isPropertyAccessExpression(originalLocation.parent) &&
+                        originalLocation.escapedText === "module" && originalLocation.parent.name.escapedText === "exports") {
+                        return moduleSymbol;
+                    }
+                }
+            }
+            if (!result) {
+                if (nameNotFoundMessage) {
+                    if (!errorLocation ||
+                        !checkAndReportErrorForMissingPrefix(errorLocation, name, nameArg) && // TODO: GH#18217
+                            !checkAndReportErrorForExtendingInterface(errorLocation) &&
+                            !checkAndReportErrorForUsingTypeAsNamespace(errorLocation, name, meaning) &&
+                            !checkAndReportErrorForUsingTypeAsValue(errorLocation, name, meaning) &&
+                            !checkAndReportErrorForUsingNamespaceModuleAsValue(errorLocation, name, meaning)) {
+                        var suggestion = void 0;
+                        if (suggestedNameNotFoundMessage && suggestionCount < maximumSuggestionCount) {
+                            suggestion = getSuggestionForNonexistentSymbol(originalLocation, name, meaning);
+                            if (suggestion) {
+                                error(errorLocation, suggestedNameNotFoundMessage, diagnosticName(nameArg), suggestion);
+                            }
+                        }
+                        if (!suggestion) {
+                            error(errorLocation, nameNotFoundMessage, diagnosticName(nameArg));
+                        }
+                        suggestionCount++;
+                    }
+                }
+                return undefined;
+            }
+            // Perform extra checks only if error reporting was requested
+            if (nameNotFoundMessage) {
+                if (propertyWithInvalidInitializer) {
+                    // We have a match, but the reference occurred within a property initializer and the identifier also binds
+                    // to a local variable in the constructor where the code will be emitted.
+                    var propertyName = propertyWithInvalidInitializer.name;
+                    error(errorLocation, ts.Diagnostics.Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor, ts.declarationNameToString(propertyName), diagnosticName(nameArg));
+                    return undefined;
+                }
+                // Only check for block-scoped variable if we have an error location and are looking for the
+                // name with variable meaning
+                //      For example,
+                //          declare module foo {
+                //              interface bar {}
+                //          }
+                //      const foo/*1*/: foo/*2*/.bar;
+                // The foo at /*1*/ and /*2*/ will share same symbol with two meanings:
+                // block-scoped variable and namespace module. However, only when we
+                // try to resolve name in /*1*/ which is used in variable position,
+                // we want to check for block-scoped
+                if (errorLocation &&
+                    (meaning & 2 /* BlockScopedVariable */ ||
+                        ((meaning & 32 /* Class */ || meaning & 384 /* Enum */) && (meaning & 67216319 /* Value */) === 67216319 /* Value */))) {
+                    var exportOrLocalSymbol = getExportSymbolOfValueSymbolIfExported(result);
+                    if (exportOrLocalSymbol.flags & 2 /* BlockScopedVariable */ || exportOrLocalSymbol.flags & 32 /* Class */ || exportOrLocalSymbol.flags & 384 /* Enum */) {
+                        checkResolvedBlockScopedVariable(exportOrLocalSymbol, errorLocation);
+                    }
+                }
+                // If we're in an external module, we can't reference value symbols created from UMD export declarations
+                if (result && isInExternalModule && (meaning & 67216319 /* Value */) === 67216319 /* Value */ && !(originalLocation.flags & 2097152 /* JSDoc */)) {
+                    var decls = result.declarations;
+                    if (decls && decls.length === 1 && decls[0].kind === 242 /* NamespaceExportDeclaration */) {
+                        error(errorLocation, ts.Diagnostics._0_refers_to_a_UMD_global_but_the_current_file_is_a_module_Consider_adding_an_import_instead, ts.unescapeLeadingUnderscores(name)); // TODO: GH#18217
+                    }
+                }
+            }
+            return result;
+        }
+        function isSelfReferenceLocation(node) {
+            switch (node.kind) {
+                case 234 /* FunctionDeclaration */:
+                case 235 /* ClassDeclaration */:
+                case 236 /* InterfaceDeclaration */:
+                case 238 /* EnumDeclaration */:
+                case 237 /* TypeAliasDeclaration */:
+                case 239 /* ModuleDeclaration */: // For `namespace N { N; }`
+                    return true;
+                default:
+                    return false;
+            }
+        }
+        function diagnosticName(nameArg) {
+            return ts.isString(nameArg) ? ts.unescapeLeadingUnderscores(nameArg) : ts.declarationNameToString(nameArg);
+        }
+        function isTypeParameterSymbolDeclaredInContainer(symbol, container) {
+            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                var decl = _a[_i];
+                if (decl.kind === 148 /* TypeParameter */) {
+                    var parent = ts.isJSDocTemplateTag(decl.parent) ? ts.getJSDocHost(decl.parent) : decl.parent;
+                    if (parent === container) {
+                        return !(ts.isJSDocTemplateTag(decl.parent) && ts.find(decl.parent.parent.tags, ts.isJSDocTypeAlias)); // TODO: GH#18217
+                    }
+                }
+            }
+            return false;
+        }
+        function checkAndReportErrorForMissingPrefix(errorLocation, name, nameArg) {
+            if (!ts.isIdentifier(errorLocation) || errorLocation.escapedText !== name || isTypeReferenceIdentifier(errorLocation) || isInTypeQuery(errorLocation)) {
+                return false;
+            }
+            var container = ts.getThisContainer(errorLocation, /*includeArrowFunctions*/ false);
+            var location = container;
+            while (location) {
+                if (ts.isClassLike(location.parent)) {
+                    var classSymbol = getSymbolOfNode(location.parent);
+                    if (!classSymbol) {
+                        break;
+                    }
+                    // Check to see if a static member exists.
+                    var constructorType = getTypeOfSymbol(classSymbol);
+                    if (getPropertyOfType(constructorType, name)) {
+                        error(errorLocation, ts.Diagnostics.Cannot_find_name_0_Did_you_mean_the_static_member_1_0, diagnosticName(nameArg), symbolToString(classSymbol));
+                        return true;
+                    }
+                    // No static member is present.
+                    // Check if we're in an instance method and look for a relevant instance member.
+                    if (location === container && !ts.hasModifier(location, 32 /* Static */)) {
+                        var instanceType = getDeclaredTypeOfSymbol(classSymbol).thisType; // TODO: GH#18217
+                        if (getPropertyOfType(instanceType, name)) {
+                            error(errorLocation, ts.Diagnostics.Cannot_find_name_0_Did_you_mean_the_instance_member_this_0, diagnosticName(nameArg));
+                            return true;
+                        }
+                    }
+                }
+                location = location.parent;
+            }
+            return false;
+        }
+        function checkAndReportErrorForExtendingInterface(errorLocation) {
+            var expression = getEntityNameForExtendingInterface(errorLocation);
+            if (expression && resolveEntityName(expression, 64 /* Interface */, /*ignoreErrors*/ true)) {
+                error(errorLocation, ts.Diagnostics.Cannot_extend_an_interface_0_Did_you_mean_implements, ts.getTextOfNode(expression));
+                return true;
+            }
+            return false;
+        }
+        /**
+         * Climbs up parents to an ExpressionWithTypeArguments, and returns its expression,
+         * but returns undefined if that expression is not an EntityNameExpression.
+         */
+        function getEntityNameForExtendingInterface(node) {
+            switch (node.kind) {
+                case 71 /* Identifier */:
+                case 185 /* PropertyAccessExpression */:
+                    return node.parent ? getEntityNameForExtendingInterface(node.parent) : undefined;
+                case 207 /* ExpressionWithTypeArguments */:
+                    if (ts.isEntityNameExpression(node.expression)) {
+                        return node.expression;
+                    }
+                // falls through
+                default:
+                    return undefined;
+            }
+        }
+        function checkAndReportErrorForUsingTypeAsNamespace(errorLocation, name, meaning) {
+            var namespaceMeaning = 1920 /* Namespace */ | (ts.isInJavaScriptFile(errorLocation) ? 67216319 /* Value */ : 0);
+            if (meaning === namespaceMeaning) {
+                var symbol = resolveSymbol(resolveName(errorLocation, name, 67901928 /* Type */ & ~namespaceMeaning, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined, /*isUse*/ false));
+                var parent = errorLocation.parent;
+                if (symbol) {
+                    if (ts.isQualifiedName(parent)) {
+                        ts.Debug.assert(parent.left === errorLocation, "Should only be resolving left side of qualified name as a namespace");
+                        var propName = parent.right.escapedText;
+                        var propType = getPropertyOfType(getDeclaredTypeOfSymbol(symbol), propName);
+                        if (propType) {
+                            error(parent, ts.Diagnostics.Cannot_access_0_1_because_0_is_a_type_but_not_a_namespace_Did_you_mean_to_retrieve_the_type_of_the_property_1_in_0_with_0_1, ts.unescapeLeadingUnderscores(name), ts.unescapeLeadingUnderscores(propName));
+                            return true;
+                        }
+                    }
+                    error(errorLocation, ts.Diagnostics._0_only_refers_to_a_type_but_is_being_used_as_a_namespace_here, ts.unescapeLeadingUnderscores(name));
+                    return true;
+                }
+            }
+            return false;
+        }
+        function checkAndReportErrorForUsingTypeAsValue(errorLocation, name, meaning) {
+            if (meaning & (67216319 /* Value */ & ~1024 /* NamespaceModule */)) {
+                if (name === "any" || name === "string" || name === "number" || name === "boolean" || name === "never") {
+                    error(errorLocation, ts.Diagnostics._0_only_refers_to_a_type_but_is_being_used_as_a_value_here, ts.unescapeLeadingUnderscores(name));
+                    return true;
+                }
+                var symbol = resolveSymbol(resolveName(errorLocation, name, 67901928 /* Type */ & ~67216319 /* Value */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined, /*isUse*/ false));
+                if (symbol && !(symbol.flags & 1024 /* NamespaceModule */)) {
+                    error(errorLocation, ts.Diagnostics._0_only_refers_to_a_type_but_is_being_used_as_a_value_here, ts.unescapeLeadingUnderscores(name));
+                    return true;
+                }
+            }
+            return false;
+        }
+        function checkAndReportErrorForUsingNamespaceModuleAsValue(errorLocation, name, meaning) {
+            if (meaning & (67216319 /* Value */ & ~1024 /* NamespaceModule */ & ~67901928 /* Type */)) {
+                var symbol = resolveSymbol(resolveName(errorLocation, name, 1024 /* NamespaceModule */ & ~67216319 /* Value */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined, /*isUse*/ false));
+                if (symbol) {
+                    error(errorLocation, ts.Diagnostics.Cannot_use_namespace_0_as_a_value, ts.unescapeLeadingUnderscores(name));
+                    return true;
+                }
+            }
+            else if (meaning & (67901928 /* Type */ & ~1024 /* NamespaceModule */ & ~67216319 /* Value */)) {
+                var symbol = resolveSymbol(resolveName(errorLocation, name, (512 /* ValueModule */ | 1024 /* NamespaceModule */) & ~67901928 /* Type */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined, /*isUse*/ false));
+                if (symbol) {
+                    error(errorLocation, ts.Diagnostics.Cannot_use_namespace_0_as_a_type, ts.unescapeLeadingUnderscores(name));
+                    return true;
+                }
+            }
+            return false;
+        }
+        function checkResolvedBlockScopedVariable(result, errorLocation) {
+            ts.Debug.assert(!!(result.flags & 2 /* BlockScopedVariable */ || result.flags & 32 /* Class */ || result.flags & 384 /* Enum */));
+            // Block-scoped variables cannot be used before their definition
+            var declaration = ts.forEach(result.declarations, function (d) { return ts.isBlockOrCatchScoped(d) || ts.isClassLike(d) || (d.kind === 238 /* EnumDeclaration */) ? d : undefined; });
+            if (declaration === undefined)
+                return ts.Debug.fail("Declaration to checkResolvedBlockScopedVariable is undefined");
+            if (!(declaration.flags & 4194304 /* Ambient */) && !isBlockScopedNameDeclaredBeforeUse(declaration, errorLocation)) {
+                if (result.flags & 2 /* BlockScopedVariable */) {
+                    error(errorLocation, ts.Diagnostics.Block_scoped_variable_0_used_before_its_declaration, ts.declarationNameToString(ts.getNameOfDeclaration(declaration)));
+                }
+                else if (result.flags & 32 /* Class */) {
+                    error(errorLocation, ts.Diagnostics.Class_0_used_before_its_declaration, ts.declarationNameToString(ts.getNameOfDeclaration(declaration)));
+                }
+                else if (result.flags & 256 /* RegularEnum */) {
+                    error(errorLocation, ts.Diagnostics.Enum_0_used_before_its_declaration, ts.declarationNameToString(ts.getNameOfDeclaration(declaration)));
+                }
+            }
+        }
+        /* Starting from 'initial' node walk up the parent chain until 'stopAt' node is reached.
+         * If at any point current node is equal to 'parent' node - return true.
+         * Return false if 'stopAt' node is reached or isFunctionLike(current) === true.
+         */
+        function isSameScopeDescendentOf(initial, parent, stopAt) {
+            return !!parent && !!ts.findAncestor(initial, function (n) { return n === stopAt || ts.isFunctionLike(n) ? "quit" : n === parent; });
+        }
+        function getAnyImportSyntax(node) {
+            switch (node.kind) {
+                case 243 /* ImportEqualsDeclaration */:
+                    return node;
+                case 245 /* ImportClause */:
+                    return node.parent;
+                case 246 /* NamespaceImport */:
+                    return node.parent.parent;
+                case 248 /* ImportSpecifier */:
+                    return node.parent.parent.parent;
+                default:
+                    return undefined;
+            }
+        }
+        function getDeclarationOfAliasSymbol(symbol) {
+            return ts.find(symbol.declarations, ts.isAliasSymbolDeclaration);
+        }
+        function getTargetOfImportEqualsDeclaration(node, dontResolveAlias) {
+            if (node.moduleReference.kind === 254 /* ExternalModuleReference */) {
+                return resolveExternalModuleSymbol(resolveExternalModuleName(node, ts.getExternalModuleImportEqualsDeclarationExpression(node)));
+            }
+            return getSymbolOfPartOfRightHandSideOfImportEquals(node.moduleReference, dontResolveAlias);
+        }
+        function resolveExportByName(moduleSymbol, name, dontResolveAlias) {
+            var exportValue = moduleSymbol.exports.get("export=" /* ExportEquals */);
+            return exportValue
+                ? getPropertyOfType(getTypeOfSymbol(exportValue), name)
+                : resolveSymbol(moduleSymbol.exports.get(name), dontResolveAlias);
+        }
+        function isSyntacticDefault(node) {
+            return ((ts.isExportAssignment(node) && !node.isExportEquals) || ts.hasModifier(node, 512 /* Default */) || ts.isExportSpecifier(node));
+        }
+        function canHaveSyntheticDefault(file, moduleSymbol, dontResolveAlias) {
+            if (!allowSyntheticDefaultImports) {
+                return false;
+            }
+            // Declaration files (and ambient modules)
+            if (!file || file.isDeclarationFile) {
+                // Definitely cannot have a synthetic default if they have a syntactic default member specified
+                var defaultExportSymbol = resolveExportByName(moduleSymbol, "default" /* Default */, /*dontResolveAlias*/ true); // Dont resolve alias because we want the immediately exported symbol's declaration
+                if (defaultExportSymbol && ts.some(defaultExportSymbol.declarations, isSyntacticDefault)) {
+                    return false;
+                }
+                // It _might_ still be incorrect to assume there is no __esModule marker on the import at runtime, even if there is no `default` member
+                // So we check a bit more,
+                if (resolveExportByName(moduleSymbol, ts.escapeLeadingUnderscores("__esModule"), dontResolveAlias)) {
+                    // If there is an `__esModule` specified in the declaration (meaning someone explicitly added it or wrote it in their code),
+                    // it definitely is a module and does not have a synthetic default
+                    return false;
+                }
+                // There are _many_ declaration files not written with esmodules in mind that still get compiled into a format with __esModule set
+                // Meaning there may be no default at runtime - however to be on the permissive side, we allow access to a synthetic default member
+                // as there is no marker to indicate if the accompanying JS has `__esModule` or not, or is even native esm
+                return true;
+            }
+            // TypeScript files never have a synthetic default (as they are always emitted with an __esModule marker) _unless_ they contain an export= statement
+            if (!ts.isSourceFileJavaScript(file)) {
+                return hasExportAssignmentSymbol(moduleSymbol);
+            }
+            // JS files have a synthetic default if they do not contain ES2015+ module syntax (export = is not valid in js) _and_ do not have an __esModule marker
+            return !file.externalModuleIndicator && !resolveExportByName(moduleSymbol, ts.escapeLeadingUnderscores("__esModule"), dontResolveAlias);
+        }
+        function getTargetOfImportClause(node, dontResolveAlias) {
+            var moduleSymbol = resolveExternalModuleName(node, node.parent.moduleSpecifier);
+            if (moduleSymbol) {
+                var exportDefaultSymbol = void 0;
+                if (ts.isShorthandAmbientModuleSymbol(moduleSymbol)) {
+                    exportDefaultSymbol = moduleSymbol;
+                }
+                else {
+                    exportDefaultSymbol = resolveExportByName(moduleSymbol, "default" /* Default */, dontResolveAlias);
+                }
+                var file = ts.find(moduleSymbol.declarations, ts.isSourceFile);
+                var hasSyntheticDefault = canHaveSyntheticDefault(file, moduleSymbol, dontResolveAlias);
+                if (!exportDefaultSymbol && !hasSyntheticDefault) {
+                    error(node.name, ts.Diagnostics.Module_0_has_no_default_export, symbolToString(moduleSymbol));
+                }
+                else if (hasSyntheticDefault) {
+                    // per emit behavior, a synthetic default overrides a "real" .default member if `__esModule` is not present
+                    return resolveExternalModuleSymbol(moduleSymbol, dontResolveAlias) || resolveSymbol(moduleSymbol, dontResolveAlias);
+                }
+                return exportDefaultSymbol;
+            }
+        }
+        function getTargetOfNamespaceImport(node, dontResolveAlias) {
+            var moduleSpecifier = node.parent.parent.moduleSpecifier;
+            return resolveESModuleSymbol(resolveExternalModuleName(node, moduleSpecifier), moduleSpecifier, dontResolveAlias);
+        }
+        // This function creates a synthetic symbol that combines the value side of one symbol with the
+        // type/namespace side of another symbol. Consider this example:
+        //
+        //   declare module graphics {
+        //       interface Point {
+        //           x: number;
+        //           y: number;
+        //       }
+        //   }
+        //   declare var graphics: {
+        //       Point: new (x: number, y: number) => graphics.Point;
+        //   }
+        //   declare module "graphics" {
+        //       export = graphics;
+        //   }
+        //
+        // An 'import { Point } from "graphics"' needs to create a symbol that combines the value side 'Point'
+        // property with the type/namespace side interface 'Point'.
+        function combineValueAndTypeSymbols(valueSymbol, typeSymbol) {
+            if (valueSymbol === unknownSymbol && typeSymbol === unknownSymbol) {
+                return unknownSymbol;
+            }
+            if (valueSymbol.flags & (67901928 /* Type */ | 1920 /* Namespace */)) {
+                return valueSymbol;
+            }
+            var result = createSymbol(valueSymbol.flags | typeSymbol.flags, valueSymbol.escapedName);
+            result.declarations = ts.deduplicate(ts.concatenate(valueSymbol.declarations, typeSymbol.declarations), ts.equateValues);
+            result.parent = valueSymbol.parent || typeSymbol.parent;
+            if (valueSymbol.valueDeclaration)
+                result.valueDeclaration = valueSymbol.valueDeclaration;
+            if (typeSymbol.members)
+                result.members = typeSymbol.members;
+            if (valueSymbol.exports)
+                result.exports = valueSymbol.exports;
+            return result;
+        }
+        function getExportOfModule(symbol, name, dontResolveAlias) {
+            if (symbol.flags & 1536 /* Module */) {
+                return resolveSymbol(getExportsOfSymbol(symbol).get(name), dontResolveAlias);
+            }
+        }
+        function getPropertyOfVariable(symbol, name) {
+            if (symbol.flags & 3 /* Variable */) {
+                var typeAnnotation = symbol.valueDeclaration.type;
+                if (typeAnnotation) {
+                    return resolveSymbol(getPropertyOfType(getTypeFromTypeNode(typeAnnotation), name)); // TODO: GH#18217
+                }
+            }
+        }
+        function getExternalModuleMember(node, specifier, dontResolveAlias) {
+            if (dontResolveAlias === void 0) { dontResolveAlias = false; }
+            var moduleSymbol = resolveExternalModuleName(node, node.moduleSpecifier); // TODO: GH#18217
+            var targetSymbol = resolveESModuleSymbol(moduleSymbol, node.moduleSpecifier, dontResolveAlias);
+            if (targetSymbol) {
+                var name = specifier.propertyName || specifier.name;
+                if (name.escapedText) {
+                    if (ts.isShorthandAmbientModuleSymbol(moduleSymbol)) {
+                        return moduleSymbol;
+                    }
+                    var symbolFromVariable = void 0;
+                    // First check if module was specified with "export=". If so, get the member from the resolved type
+                    if (moduleSymbol && moduleSymbol.exports && moduleSymbol.exports.get("export=" /* ExportEquals */)) {
+                        symbolFromVariable = getPropertyOfType(getTypeOfSymbol(targetSymbol), name.escapedText);
+                    }
+                    else {
+                        symbolFromVariable = getPropertyOfVariable(targetSymbol, name.escapedText);
+                    }
+                    // if symbolFromVariable is export - get its final target
+                    symbolFromVariable = resolveSymbol(symbolFromVariable, dontResolveAlias);
+                    var symbolFromModule = getExportOfModule(targetSymbol, name.escapedText, dontResolveAlias);
+                    // If the export member we're looking for is default, and there is no real default but allowSyntheticDefaultImports is on, return the entire module as the default
+                    if (!symbolFromModule && allowSyntheticDefaultImports && name.escapedText === "default" /* Default */) {
+                        symbolFromModule = resolveExternalModuleSymbol(moduleSymbol, dontResolveAlias) || resolveSymbol(moduleSymbol, dontResolveAlias);
+                    }
+                    var symbol = symbolFromModule && symbolFromVariable && symbolFromModule !== symbolFromVariable ?
+                        combineValueAndTypeSymbols(symbolFromVariable, symbolFromModule) :
+                        symbolFromModule || symbolFromVariable;
+                    if (!symbol) {
+                        var moduleName = getFullyQualifiedName(moduleSymbol);
+                        var declarationName = ts.declarationNameToString(name);
+                        var suggestion = getSuggestionForNonexistentModule(name, targetSymbol);
+                        if (suggestion !== undefined) {
+                            error(name, ts.Diagnostics.Module_0_has_no_exported_member_1_Did_you_mean_2, moduleName, declarationName, suggestion);
+                        }
+                        else {
+                            error(name, ts.Diagnostics.Module_0_has_no_exported_member_1, moduleName, declarationName);
+                        }
+                    }
+                    return symbol;
+                }
+            }
+        }
+        function getTargetOfImportSpecifier(node, dontResolveAlias) {
+            return getExternalModuleMember(node.parent.parent.parent, node, dontResolveAlias);
+        }
+        function getTargetOfNamespaceExportDeclaration(node, dontResolveAlias) {
+            return resolveExternalModuleSymbol(node.parent.symbol, dontResolveAlias);
+        }
+        function getTargetOfExportSpecifier(node, meaning, dontResolveAlias) {
+            return node.parent.parent.moduleSpecifier ?
+                getExternalModuleMember(node.parent.parent, node, dontResolveAlias) :
+                resolveEntityName(node.propertyName || node.name, meaning, /*ignoreErrors*/ false, dontResolveAlias);
+        }
+        function getTargetOfExportAssignment(node, dontResolveAlias) {
+            var expression = (ts.isExportAssignment(node) ? node.expression : node.right);
+            if (ts.isClassExpression(expression)) {
+                return checkExpression(expression).symbol;
+            }
+            var aliasLike = resolveEntityName(expression, 67216319 /* Value */ | 67901928 /* Type */ | 1920 /* Namespace */, /*ignoreErrors*/ true, dontResolveAlias);
+            if (aliasLike) {
+                return aliasLike;
+            }
+            checkExpression(expression);
+            return getNodeLinks(expression).resolvedSymbol;
+        }
+        function getTargetOfAliasDeclaration(node, dontRecursivelyResolve) {
+            if (dontRecursivelyResolve === void 0) { dontRecursivelyResolve = false; }
+            switch (node.kind) {
+                case 243 /* ImportEqualsDeclaration */:
+                    return getTargetOfImportEqualsDeclaration(node, dontRecursivelyResolve);
+                case 245 /* ImportClause */:
+                    return getTargetOfImportClause(node, dontRecursivelyResolve);
+                case 246 /* NamespaceImport */:
+                    return getTargetOfNamespaceImport(node, dontRecursivelyResolve);
+                case 248 /* ImportSpecifier */:
+                    return getTargetOfImportSpecifier(node, dontRecursivelyResolve);
+                case 252 /* ExportSpecifier */:
+                    return getTargetOfExportSpecifier(node, 67216319 /* Value */ | 67901928 /* Type */ | 1920 /* Namespace */, dontRecursivelyResolve);
+                case 249 /* ExportAssignment */:
+                case 200 /* BinaryExpression */:
+                    return getTargetOfExportAssignment(node, dontRecursivelyResolve);
+                case 242 /* NamespaceExportDeclaration */:
+                    return getTargetOfNamespaceExportDeclaration(node, dontRecursivelyResolve);
+                default:
+                    return ts.Debug.fail();
+            }
+        }
+        /**
+         * Indicates that a symbol is an alias that does not merge with a local declaration.
+         * OR Is a JSContainer which may merge an alias with a local declaration
+         */
+        function isNonLocalAlias(symbol, excludes) {
+            if (excludes === void 0) { excludes = 67216319 /* Value */ | 67901928 /* Type */ | 1920 /* Namespace */; }
+            if (!symbol)
+                return false;
+            return (symbol.flags & (2097152 /* Alias */ | excludes)) === 2097152 /* Alias */ || !!(symbol.flags & 2097152 /* Alias */ && symbol.flags & 67108864 /* JSContainer */);
+        }
+        function resolveSymbol(symbol, dontResolveAlias) {
+            return !dontResolveAlias && isNonLocalAlias(symbol) ? resolveAlias(symbol) : symbol;
+        }
+        function resolveAlias(symbol) {
+            ts.Debug.assert((symbol.flags & 2097152 /* Alias */) !== 0, "Should only get Alias here.");
+            var links = getSymbolLinks(symbol);
+            if (!links.target) {
+                links.target = resolvingSymbol;
+                var node = getDeclarationOfAliasSymbol(symbol);
+                if (!node)
+                    return ts.Debug.fail();
+                var target = getTargetOfAliasDeclaration(node);
+                if (links.target === resolvingSymbol) {
+                    links.target = target || unknownSymbol;
+                }
+                else {
+                    error(node, ts.Diagnostics.Circular_definition_of_import_alias_0, symbolToString(symbol));
+                }
+            }
+            else if (links.target === resolvingSymbol) {
+                links.target = unknownSymbol;
+            }
+            return links.target;
+        }
+        function markExportAsReferenced(node) {
+            var symbol = getSymbolOfNode(node);
+            var target = resolveAlias(symbol);
+            if (target) {
+                var markAlias = target === unknownSymbol ||
+                    ((target.flags & 67216319 /* Value */) && !isConstEnumOrConstEnumOnlyModule(target));
+                if (markAlias) {
+                    markAliasSymbolAsReferenced(symbol);
+                }
+            }
+        }
+        // When an alias symbol is referenced, we need to mark the entity it references as referenced and in turn repeat that until
+        // we reach a non-alias or an exported entity (which is always considered referenced). We do this by checking the target of
+        // the alias as an expression (which recursively takes us back here if the target references another alias).
+        function markAliasSymbolAsReferenced(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.referenced) {
+                links.referenced = true;
+                var node = getDeclarationOfAliasSymbol(symbol);
+                if (!node)
+                    return ts.Debug.fail();
+                if (node.kind === 249 /* ExportAssignment */) {
+                    // export default <symbol>
+                    checkExpressionCached(node.expression);
+                }
+                else if (node.kind === 252 /* ExportSpecifier */) {
+                    // export { <symbol> } or export { <symbol> as foo }
+                    checkExpressionCached(node.propertyName || node.name);
+                }
+                else if (ts.isInternalModuleImportEqualsDeclaration(node)) {
+                    // import foo = <symbol>
+                    checkExpressionCached(node.moduleReference);
+                }
+            }
+        }
+        // This function is only for imports with entity names
+        function getSymbolOfPartOfRightHandSideOfImportEquals(entityName, dontResolveAlias) {
+            // There are three things we might try to look for. In the following examples,
+            // the search term is enclosed in |...|:
+            //
+            //     import a = |b|; // Namespace
+            //     import a = |b.c|; // Value, type, namespace
+            //     import a = |b.c|.d; // Namespace
+            if (entityName.kind === 71 /* Identifier */ && ts.isRightSideOfQualifiedNameOrPropertyAccess(entityName)) {
+                entityName = entityName.parent;
+            }
+            // Check for case 1 and 3 in the above example
+            if (entityName.kind === 71 /* Identifier */ || entityName.parent.kind === 146 /* QualifiedName */) {
+                return resolveEntityName(entityName, 1920 /* Namespace */, /*ignoreErrors*/ false, dontResolveAlias);
+            }
+            else {
+                // Case 2 in above example
+                // entityName.kind could be a QualifiedName or a Missing identifier
+                ts.Debug.assert(entityName.parent.kind === 243 /* ImportEqualsDeclaration */);
+                return resolveEntityName(entityName, 67216319 /* Value */ | 67901928 /* Type */ | 1920 /* Namespace */, /*ignoreErrors*/ false, dontResolveAlias);
+            }
+        }
+        function getFullyQualifiedName(symbol) {
+            return symbol.parent ? getFullyQualifiedName(symbol.parent) + "." + symbolToString(symbol) : symbolToString(symbol);
+        }
+        /**
+         * Resolves a qualified name and any involved aliases.
+         */
+        function resolveEntityName(name, meaning, ignoreErrors, dontResolveAlias, location) {
+            if (ts.nodeIsMissing(name)) {
+                return undefined;
+            }
+            var namespaceMeaning = 1920 /* Namespace */ | (ts.isInJavaScriptFile(name) ? meaning & 67216319 /* Value */ : 0);
+            var symbol;
+            if (name.kind === 71 /* Identifier */) {
+                var message = meaning === namespaceMeaning ? ts.Diagnostics.Cannot_find_namespace_0 : ts.Diagnostics.Cannot_find_name_0;
+                var symbolFromJSPrototype = ts.isInJavaScriptFile(name) ? resolveEntityNameFromJSSpecialAssignment(name, meaning) : undefined;
+                symbol = resolveName(location || name, name.escapedText, meaning, ignoreErrors || symbolFromJSPrototype ? undefined : message, name, /*isUse*/ true);
+                if (!symbol) {
+                    return symbolFromJSPrototype;
+                }
+            }
+            else if (name.kind === 146 /* QualifiedName */ || name.kind === 185 /* PropertyAccessExpression */) {
+                var left = name.kind === 146 /* QualifiedName */ ? name.left : name.expression;
+                var right = name.kind === 146 /* QualifiedName */ ? name.right : name.name;
+                var namespace = resolveEntityName(left, namespaceMeaning, ignoreErrors, /*dontResolveAlias*/ false, location);
+                if (!namespace || ts.nodeIsMissing(right)) {
+                    return undefined;
+                }
+                else if (namespace === unknownSymbol) {
+                    return namespace;
+                }
+                if (ts.isInJavaScriptFile(name)) {
+                    if (namespace.valueDeclaration &&
+                        ts.isVariableDeclaration(namespace.valueDeclaration) &&
+                        namespace.valueDeclaration.initializer &&
+                        isCommonJsRequire(namespace.valueDeclaration.initializer)) {
+                        var moduleName = namespace.valueDeclaration.initializer.arguments[0];
+                        var moduleSym = resolveExternalModuleName(moduleName, moduleName);
+                        if (moduleSym) {
+                            var resolvedModuleSymbol = resolveExternalModuleSymbol(moduleSym);
+                            if (resolvedModuleSymbol) {
+                                namespace = resolvedModuleSymbol;
+                            }
+                        }
+                    }
+                }
+                symbol = getSymbol(getExportsOfSymbol(namespace), right.escapedText, meaning);
+                if (!symbol) {
+                    if (!ignoreErrors) {
+                        error(right, ts.Diagnostics.Namespace_0_has_no_exported_member_1, getFullyQualifiedName(namespace), ts.declarationNameToString(right));
+                    }
+                    return undefined;
+                }
+            }
+            else {
+                throw ts.Debug.assertNever(name, "Unknown entity name kind.");
+            }
+            ts.Debug.assert((ts.getCheckFlags(symbol) & 1 /* Instantiated */) === 0, "Should never get an instantiated symbol here.");
+            return (symbol.flags & meaning) || dontResolveAlias ? symbol : resolveAlias(symbol);
+        }
+        /**
+         * 1. For prototype-property methods like `A.prototype.m = function () ...`, try to resolve names in the scope of `A` too.
+         * Note that prototype-property assignment to locations outside the current file (eg globals) doesn't work, so
+         * name resolution won't work either.
+         * 2. For property assignments like `{ x: function f () { } }`, try to resolve names in the scope of `f` too.
+         */
+        function resolveEntityNameFromJSSpecialAssignment(name, meaning) {
+            if (isJSDocTypeReference(name.parent)) {
+                var secondaryLocation = getJSSpecialAssignmentLocation(name.parent);
+                if (secondaryLocation) {
+                    return resolveName(secondaryLocation, name.escapedText, meaning, /*nameNotFoundMessage*/ undefined, name, /*isUse*/ true);
+                }
+            }
+        }
+        function getJSSpecialAssignmentLocation(node) {
+            var typeAlias = ts.findAncestor(node, function (node) { return !(ts.isJSDocNode(node) || node.flags & 2097152 /* JSDoc */) ? "quit" : ts.isJSDocTypeAlias(node); });
+            if (typeAlias) {
+                return;
+            }
+            var host = ts.getJSDocHost(node);
+            if (ts.isExpressionStatement(host) &&
+                ts.isBinaryExpression(host.expression) &&
+                ts.getSpecialPropertyAssignmentKind(host.expression) === 3 /* PrototypeProperty */) {
+                var symbol = getSymbolOfNode(host.expression.left);
+                return symbol && symbol.parent.valueDeclaration;
+            }
+            var sig = ts.getHostSignatureFromJSDocHost(host);
+            if (sig) {
+                var symbol = getSymbolOfNode(sig);
+                return symbol && symbol.valueDeclaration;
+            }
+        }
+        function resolveExternalModuleName(location, moduleReferenceExpression) {
+            return resolveExternalModuleNameWorker(location, moduleReferenceExpression, ts.Diagnostics.Cannot_find_module_0);
+        }
+        function resolveExternalModuleNameWorker(location, moduleReferenceExpression, moduleNotFoundError, isForAugmentation) {
+            if (isForAugmentation === void 0) { isForAugmentation = false; }
+            return ts.isStringLiteralLike(moduleReferenceExpression)
+                ? resolveExternalModule(location, moduleReferenceExpression.text, moduleNotFoundError, moduleReferenceExpression, isForAugmentation)
+                : undefined;
+        }
+        function resolveExternalModule(location, moduleReference, moduleNotFoundError, errorNode, isForAugmentation) {
+            if (isForAugmentation === void 0) { isForAugmentation = false; }
+            if (moduleReference === undefined) {
+                return;
+            }
+            if (ts.startsWith(moduleReference, "@types/")) {
+                var diag = ts.Diagnostics.Cannot_import_type_declaration_files_Consider_importing_0_instead_of_1;
+                var withoutAtTypePrefix = ts.removePrefix(moduleReference, "@types/");
+                error(errorNode, diag, withoutAtTypePrefix, moduleReference);
+            }
+            var ambientModule = tryFindAmbientModule(moduleReference, /*withAugmentations*/ true);
+            if (ambientModule) {
+                return ambientModule;
+            }
+            var currentSourceFile = ts.getSourceFileOfNode(location);
+            var resolvedModule = ts.getResolvedModule(currentSourceFile, moduleReference); // TODO: GH#18217
+            var resolutionDiagnostic = resolvedModule && ts.getResolutionDiagnostic(compilerOptions, resolvedModule);
+            var sourceFile = resolvedModule && !resolutionDiagnostic && host.getSourceFile(resolvedModule.resolvedFileName);
+            if (sourceFile) {
+                if (sourceFile.symbol) {
+                    if (resolvedModule.isExternalLibraryImport && !ts.extensionIsTypeScript(resolvedModule.extension)) {
+                        errorOnImplicitAnyModule(/*isError*/ false, errorNode, resolvedModule, moduleReference);
+                    }
+                    // merged symbol is module declaration symbol combined with all augmentations
+                    return getMergedSymbol(sourceFile.symbol);
+                }
+                if (moduleNotFoundError) {
+                    // report errors only if it was requested
+                    error(errorNode, ts.Diagnostics.File_0_is_not_a_module, sourceFile.fileName);
+                }
+                return undefined;
+            }
+            if (patternAmbientModules) {
+                var pattern = ts.findBestPatternMatch(patternAmbientModules, function (_) { return _.pattern; }, moduleReference);
+                if (pattern) {
+                    return getMergedSymbol(pattern.symbol);
+                }
+            }
+            // May be an untyped module. If so, ignore resolutionDiagnostic.
+            if (resolvedModule && !ts.resolutionExtensionIsTypeScriptOrJson(resolvedModule.extension) && resolutionDiagnostic === undefined || resolutionDiagnostic === ts.Diagnostics.Could_not_find_a_declaration_file_for_module_0_1_implicitly_has_an_any_type) {
+                if (isForAugmentation) {
+                    var diag = ts.Diagnostics.Invalid_module_name_in_augmentation_Module_0_resolves_to_an_untyped_module_at_1_which_cannot_be_augmented;
+                    error(errorNode, diag, moduleReference, resolvedModule.resolvedFileName);
+                }
+                else {
+                    errorOnImplicitAnyModule(/*isError*/ noImplicitAny && !!moduleNotFoundError, errorNode, resolvedModule, moduleReference);
+                }
+                // Failed imports and untyped modules are both treated in an untyped manner; only difference is whether we give a diagnostic first.
+                return undefined;
+            }
+            if (moduleNotFoundError) {
+                // For relative paths, see if this was possibly a projectReference redirect
+                if (ts.pathIsRelative(moduleReference)) {
+                    var sourceFile_1 = ts.getSourceFileOfNode(location);
+                    var redirects = sourceFile_1.redirectedReferences;
+                    if (redirects) {
+                        var normalizedTargetPath = ts.getNormalizedAbsolutePath(moduleReference, ts.getDirectoryPath(sourceFile_1.fileName));
+                        for (var _i = 0, _a = [".ts" /* Ts */, ".tsx" /* Tsx */]; _i < _a.length; _i++) {
+                            var ext = _a[_i];
+                            var probePath = normalizedTargetPath + ext;
+                            if (redirects.indexOf(probePath) >= 0) {
+                                error(errorNode, ts.Diagnostics.Output_file_0_has_not_been_built_from_source_file_1, moduleReference, probePath);
+                                return undefined;
+                            }
+                        }
+                    }
+                }
+                if (resolutionDiagnostic) {
+                    error(errorNode, resolutionDiagnostic, moduleReference, resolvedModule.resolvedFileName);
+                }
+                else {
+                    var tsExtension = ts.tryExtractTypeScriptExtension(moduleReference);
+                    if (tsExtension) {
+                        var diag = ts.Diagnostics.An_import_path_cannot_end_with_a_0_extension_Consider_importing_1_instead;
+                        error(errorNode, diag, tsExtension, ts.removeExtension(moduleReference, tsExtension));
+                    }
+                    else {
+                        error(errorNode, moduleNotFoundError, moduleReference);
+                    }
+                }
+            }
+            return undefined;
+        }
+        function errorOnImplicitAnyModule(isError, errorNode, _a, moduleReference) {
+            var packageId = _a.packageId, resolvedFileName = _a.resolvedFileName;
+            var errorInfo = packageId && ts.chainDiagnosticMessages(
+            /*details*/ undefined, ts.Diagnostics.Try_npm_install_types_Slash_0_if_it_exists_or_add_a_new_declaration_d_ts_file_containing_declare_module_0, ts.getMangledNameForScopedPackage(packageId.name));
+            errorOrSuggestion(isError, errorNode, ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Could_not_find_a_declaration_file_for_module_0_1_implicitly_has_an_any_type, moduleReference, resolvedFileName));
+        }
+        function resolveExternalModuleSymbol(moduleSymbol, dontResolveAlias) {
+            return moduleSymbol && getMergedSymbol(getCommonJsExportEquals(resolveSymbol(moduleSymbol.exports.get("export=" /* ExportEquals */), dontResolveAlias), moduleSymbol)) || moduleSymbol;
+        }
+        function getCommonJsExportEquals(exported, moduleSymbol) {
+            if (!exported || moduleSymbol.exports.size === 1) {
+                return exported;
+            }
+            var merged = cloneSymbol(exported);
+            if (merged.exports === undefined) {
+                merged.flags = merged.flags | 512 /* ValueModule */;
+                merged.exports = ts.createSymbolTable();
+            }
+            moduleSymbol.exports.forEach(function (s, name) {
+                if (name === "export=" /* ExportEquals */)
+                    return;
+                merged.exports.set(name, merged.exports.has(name) ? mergeSymbol(merged.exports.get(name), s) : s);
+            });
+            return merged;
+        }
+        // An external module with an 'export =' declaration may be referenced as an ES6 module provided the 'export ='
+        // references a symbol that is at least declared as a module or a variable. The target of the 'export =' may
+        // combine other declarations with the module or variable (e.g. a class/module, function/module, interface/variable).
+        function resolveESModuleSymbol(moduleSymbol, referencingLocation, dontResolveAlias) {
+            var symbol = resolveExternalModuleSymbol(moduleSymbol, dontResolveAlias);
+            if (!dontResolveAlias && symbol) {
+                if (!(symbol.flags & (1536 /* Module */ | 3 /* Variable */))) {
+                    error(referencingLocation, ts.Diagnostics.Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct, symbolToString(moduleSymbol));
+                    return symbol;
+                }
+                if (compilerOptions.esModuleInterop) {
+                    var referenceParent = referencingLocation.parent;
+                    if ((ts.isImportDeclaration(referenceParent) && ts.getNamespaceDeclarationNode(referenceParent)) ||
+                        ts.isImportCall(referenceParent)) {
+                        var type = getTypeOfSymbol(symbol);
+                        var sigs = getSignaturesOfStructuredType(type, 0 /* Call */);
+                        if (!sigs || !sigs.length) {
+                            sigs = getSignaturesOfStructuredType(type, 1 /* Construct */);
+                        }
+                        if (sigs && sigs.length) {
+                            var moduleType = getTypeWithSyntheticDefaultImportType(type, symbol, moduleSymbol);
+                            // Create a new symbol which has the module's type less the call and construct signatures
+                            var result = createSymbol(symbol.flags, symbol.escapedName);
+                            result.declarations = symbol.declarations ? symbol.declarations.slice() : [];
+                            result.parent = symbol.parent;
+                            result.target = symbol;
+                            result.originatingImport = referenceParent;
+                            if (symbol.valueDeclaration)
+                                result.valueDeclaration = symbol.valueDeclaration;
+                            if (symbol.constEnumOnlyModule)
+                                result.constEnumOnlyModule = true;
+                            if (symbol.members)
+                                result.members = ts.cloneMap(symbol.members);
+                            if (symbol.exports)
+                                result.exports = ts.cloneMap(symbol.exports);
+                            var resolvedModuleType = resolveStructuredTypeMembers(moduleType); // Should already be resolved from the signature checks above
+                            result.type = createAnonymousType(result, resolvedModuleType.members, ts.emptyArray, ts.emptyArray, resolvedModuleType.stringIndexInfo, resolvedModuleType.numberIndexInfo);
+                            return result;
+                        }
+                    }
+                }
+            }
+            return symbol;
+        }
+        function hasExportAssignmentSymbol(moduleSymbol) {
+            return moduleSymbol.exports.get("export=" /* ExportEquals */) !== undefined;
+        }
+        function getExportsOfModuleAsArray(moduleSymbol) {
+            return symbolsToArray(getExportsOfModule(moduleSymbol));
+        }
+        function getExportsAndPropertiesOfModule(moduleSymbol) {
+            var exports = getExportsOfModuleAsArray(moduleSymbol);
+            var exportEquals = resolveExternalModuleSymbol(moduleSymbol);
+            if (exportEquals !== moduleSymbol) {
+                ts.addRange(exports, getPropertiesOfType(getTypeOfSymbol(exportEquals)));
+            }
+            return exports;
+        }
+        function tryGetMemberInModuleExports(memberName, moduleSymbol) {
+            var symbolTable = getExportsOfModule(moduleSymbol);
+            if (symbolTable) {
+                return symbolTable.get(memberName);
+            }
+        }
+        function tryGetMemberInModuleExportsAndProperties(memberName, moduleSymbol) {
+            var symbol = tryGetMemberInModuleExports(memberName, moduleSymbol);
+            if (symbol) {
+                return symbol;
+            }
+            var exportEquals = resolveExternalModuleSymbol(moduleSymbol);
+            if (exportEquals === moduleSymbol) {
+                return undefined;
+            }
+            var type = getTypeOfSymbol(exportEquals);
+            return type.flags & 32764 /* Primitive */ ? undefined : getPropertyOfType(type, memberName);
+        }
+        function getExportsOfSymbol(symbol) {
+            return symbol.flags & 32 /* Class */ ? getResolvedMembersOrExportsOfSymbol(symbol, "resolvedExports" /* resolvedExports */) :
+                symbol.flags & 1536 /* Module */ ? getExportsOfModule(symbol) :
+                    symbol.exports || emptySymbols;
+        }
+        function getExportsOfModule(moduleSymbol) {
+            var links = getSymbolLinks(moduleSymbol);
+            return links.resolvedExports || (links.resolvedExports = getExportsOfModuleWorker(moduleSymbol));
+        }
+        /**
+         * Extends one symbol table with another while collecting information on name collisions for error message generation into the `lookupTable` argument
+         * Not passing `lookupTable` and `exportNode` disables this collection, and just extends the tables
+         */
+        function extendExportSymbols(target, source, lookupTable, exportNode) {
+            if (!source)
+                return;
+            source.forEach(function (sourceSymbol, id) {
+                if (id === "default" /* Default */)
+                    return;
+                var targetSymbol = target.get(id);
+                if (!targetSymbol) {
+                    target.set(id, sourceSymbol);
+                    if (lookupTable && exportNode) {
+                        lookupTable.set(id, {
+                            specifierText: ts.getTextOfNode(exportNode.moduleSpecifier)
+                        });
+                    }
+                }
+                else if (lookupTable && exportNode && targetSymbol && resolveSymbol(targetSymbol) !== resolveSymbol(sourceSymbol)) {
+                    var collisionTracker = lookupTable.get(id);
+                    if (!collisionTracker.exportsWithDuplicate) {
+                        collisionTracker.exportsWithDuplicate = [exportNode];
+                    }
+                    else {
+                        collisionTracker.exportsWithDuplicate.push(exportNode);
+                    }
+                }
+            });
+        }
+        function getExportsOfModuleWorker(moduleSymbol) {
+            var visitedSymbols = [];
+            // A module defined by an 'export=' consists on one export that needs to be resolved
+            moduleSymbol = resolveExternalModuleSymbol(moduleSymbol);
+            return visit(moduleSymbol) || emptySymbols;
+            // The ES6 spec permits export * declarations in a module to circularly reference the module itself. For example,
+            // module 'a' can 'export * from "b"' and 'b' can 'export * from "a"' without error.
+            function visit(symbol) {
+                if (!(symbol && symbol.flags & 1955 /* HasExports */ && ts.pushIfUnique(visitedSymbols, symbol))) {
+                    return;
+                }
+                var symbols = ts.cloneMap(symbol.exports);
+                // All export * declarations are collected in an __export symbol by the binder
+                var exportStars = symbol.exports.get("__export" /* ExportStar */);
+                if (exportStars) {
+                    var nestedSymbols = ts.createSymbolTable();
+                    var lookupTable_1 = ts.createMap();
+                    for (var _i = 0, _a = exportStars.declarations; _i < _a.length; _i++) {
+                        var node = _a[_i];
+                        var resolvedModule = resolveExternalModuleName(node, node.moduleSpecifier);
+                        var exportedSymbols = visit(resolvedModule);
+                        extendExportSymbols(nestedSymbols, exportedSymbols, lookupTable_1, node);
+                    }
+                    lookupTable_1.forEach(function (_a, id) {
+                        var exportsWithDuplicate = _a.exportsWithDuplicate;
+                        // It's not an error if the file with multiple `export *`s with duplicate names exports a member with that name itself
+                        if (id === "export=" || !(exportsWithDuplicate && exportsWithDuplicate.length) || symbols.has(id)) {
+                            return;
+                        }
+                        for (var _i = 0, exportsWithDuplicate_1 = exportsWithDuplicate; _i < exportsWithDuplicate_1.length; _i++) {
+                            var node = exportsWithDuplicate_1[_i];
+                            diagnostics.add(ts.createDiagnosticForNode(node, ts.Diagnostics.Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambiguity, lookupTable_1.get(id).specifierText, ts.unescapeLeadingUnderscores(id)));
+                        }
+                    });
+                    extendExportSymbols(symbols, nestedSymbols);
+                }
+                return symbols;
+            }
+        }
+        function getMergedSymbol(symbol) {
+            var merged;
+            return symbol && symbol.mergeId && (merged = mergedSymbols[symbol.mergeId]) ? merged : symbol;
+        }
+        function getSymbolOfNode(node) {
+            return getMergedSymbol(node.symbol && getLateBoundSymbol(node.symbol));
+        }
+        function getParentOfSymbol(symbol) {
+            return getMergedSymbol(symbol.parent && getLateBoundSymbol(symbol.parent));
+        }
+        /**
+         * Attempts to find the symbol corresponding to the container a symbol is in - usually this
+         * is just its' `.parent`, but for locals, this value is `undefined`
+         */
+        function getContainerOfSymbol(symbol) {
+            var container = getParentOfSymbol(symbol);
+            if (container) {
+                return container;
+            }
+            var candidate = ts.forEach(symbol.declarations, function (d) { return !ts.isAmbientModule(d) && d.parent && hasNonGlobalAugmentationExternalModuleSymbol(d.parent) ? getSymbolOfNode(d.parent) : undefined; });
+            if (!candidate) {
+                return undefined;
+            }
+            var alias = getAliasForSymbolInContainer(candidate, symbol);
+            return alias ? candidate : undefined;
+        }
+        function getAliasForSymbolInContainer(container, symbol) {
+            if (container === getParentOfSymbol(symbol)) {
+                // fast path, `symbol` is either already the alias or isn't aliased
+                return symbol;
+            }
+            var exports = getExportsOfSymbol(container);
+            var quick = exports.get(symbol.escapedName);
+            if (quick && symbolRefersToTarget(quick)) {
+                return quick;
+            }
+            return ts.forEachEntry(exports, function (exported) {
+                if (symbolRefersToTarget(exported)) {
+                    return exported;
+                }
+            });
+            function symbolRefersToTarget(s) {
+                if (s === symbol || resolveSymbol(s) === symbol || resolveSymbol(s) === resolveSymbol(symbol)) {
+                    return s;
+                }
+            }
+        }
+        function getExportSymbolOfValueSymbolIfExported(symbol) {
+            return symbol && (symbol.flags & 1048576 /* ExportValue */) !== 0
+                ? getMergedSymbol(symbol.exportSymbol)
+                : symbol;
+        }
+        function symbolIsValue(symbol) {
+            return !!(symbol.flags & 67216319 /* Value */ || symbol.flags & 2097152 /* Alias */ && resolveAlias(symbol).flags & 67216319 /* Value */);
+        }
+        function findConstructorDeclaration(node) {
+            var members = node.members;
+            for (var _i = 0, members_2 = members; _i < members_2.length; _i++) {
+                var member = members_2[_i];
+                if (member.kind === 155 /* Constructor */ && ts.nodeIsPresent(member.body)) {
+                    return member;
+                }
+            }
+        }
+        function createType(flags) {
+            var result = new Type(checker, flags);
+            typeCount++;
+            result.id = typeCount;
+            return result;
+        }
+        function createIntrinsicType(kind, intrinsicName) {
+            var type = createType(kind);
+            type.intrinsicName = intrinsicName;
+            return type;
+        }
+        function createBooleanType(trueFalseTypes) {
+            var type = getUnionType(trueFalseTypes);
+            type.flags |= 16 /* Boolean */;
+            type.intrinsicName = "boolean";
+            return type;
+        }
+        function createObjectType(objectFlags, symbol) {
+            var type = createType(131072 /* Object */);
+            type.objectFlags = objectFlags;
+            type.symbol = symbol;
+            return type;
+        }
+        function createTypeofType() {
+            return getUnionType(ts.arrayFrom(typeofEQFacts.keys(), getLiteralType));
+        }
+        // A reserved member name starts with two underscores, but the third character cannot be an underscore
+        // or the @ symbol. A third underscore indicates an escaped form of an identifer that started
+        // with at least two underscores. The @ character indicates that the name is denoted by a well known ES
+        // Symbol instance.
+        function isReservedMemberName(name) {
+            return name.charCodeAt(0) === 95 /* _ */ &&
+                name.charCodeAt(1) === 95 /* _ */ &&
+                name.charCodeAt(2) !== 95 /* _ */ &&
+                name.charCodeAt(2) !== 64 /* at */;
+        }
+        function getNamedMembers(members) {
+            var result;
+            members.forEach(function (symbol, id) {
+                if (!isReservedMemberName(id)) {
+                    if (!result)
+                        result = [];
+                    if (symbolIsValue(symbol)) {
+                        result.push(symbol);
+                    }
+                }
+            });
+            return result || ts.emptyArray;
+        }
+        function setStructuredTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo) {
+            type.members = members;
+            type.properties = getNamedMembers(members);
+            type.callSignatures = callSignatures;
+            type.constructSignatures = constructSignatures;
+            if (stringIndexInfo)
+                type.stringIndexInfo = stringIndexInfo;
+            if (numberIndexInfo)
+                type.numberIndexInfo = numberIndexInfo;
+            return type;
+        }
+        function createAnonymousType(symbol, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo) {
+            return setStructuredTypeMembers(createObjectType(16 /* Anonymous */, symbol), members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+        }
+        function forEachSymbolTableInScope(enclosingDeclaration, callback) {
+            var result;
+            for (var location = enclosingDeclaration; location; location = location.parent) {
+                // Locals of a source file are not in scope (because they get merged into the global symbol table)
+                if (location.locals && !isGlobalSourceFile(location)) {
+                    if (result = callback(location.locals)) {
+                        return result;
+                    }
+                }
+                switch (location.kind) {
+                    case 274 /* SourceFile */:
+                        if (!ts.isExternalOrCommonJsModule(location)) {
+                            break;
+                        }
+                    // falls through
+                    case 239 /* ModuleDeclaration */:
+                        if (result = callback(getSymbolOfNode(location).exports)) {
+                            return result;
+                        }
+                        break;
+                }
+            }
+            return callback(globals);
+        }
+        function getQualifiedLeftMeaning(rightMeaning) {
+            // If we are looking in value space, the parent meaning is value, other wise it is namespace
+            return rightMeaning === 67216319 /* Value */ ? 67216319 /* Value */ : 1920 /* Namespace */;
+        }
+        function getAccessibleSymbolChain(symbol, enclosingDeclaration, meaning, useOnlyExternalAliasing, visitedSymbolTablesMap) {
+            if (visitedSymbolTablesMap === void 0) { visitedSymbolTablesMap = ts.createMap(); }
+            if (!(symbol && !isPropertyOrMethodDeclarationSymbol(symbol))) {
+                return undefined;
+            }
+            var id = "" + getSymbolId(symbol);
+            var visitedSymbolTables = visitedSymbolTablesMap.get(id);
+            if (!visitedSymbolTables) {
+                visitedSymbolTablesMap.set(id, visitedSymbolTables = []);
+            }
+            return forEachSymbolTableInScope(enclosingDeclaration, getAccessibleSymbolChainFromSymbolTable);
+            /**
+             * @param {ignoreQualification} boolean Set when a symbol is being looked for through the exports of another symbol (meaning we have a route to qualify it already)
+             */
+            function getAccessibleSymbolChainFromSymbolTable(symbols, ignoreQualification) {
+                if (!ts.pushIfUnique(visitedSymbolTables, symbols)) {
+                    return undefined;
+                }
+                var result = trySymbolTable(symbols, ignoreQualification);
+                visitedSymbolTables.pop();
+                return result;
+            }
+            function canQualifySymbol(symbolFromSymbolTable, meaning) {
+                // If the symbol is equivalent and doesn't need further qualification, this symbol is accessible
+                return !needsQualification(symbolFromSymbolTable, enclosingDeclaration, meaning) ||
+                    // If symbol needs qualification, make sure that parent is accessible, if it is then this symbol is accessible too
+                    !!getAccessibleSymbolChain(symbolFromSymbolTable.parent, enclosingDeclaration, getQualifiedLeftMeaning(meaning), useOnlyExternalAliasing, visitedSymbolTablesMap);
+            }
+            function isAccessible(symbolFromSymbolTable, resolvedAliasSymbol, ignoreQualification) {
+                return symbol === (resolvedAliasSymbol || symbolFromSymbolTable) &&
+                    // if the symbolFromSymbolTable is not external module (it could be if it was determined as ambient external module and would be in globals table)
+                    // and if symbolFromSymbolTable or alias resolution matches the symbol,
+                    // check the symbol can be qualified, it is only then this symbol is accessible
+                    !ts.some(symbolFromSymbolTable.declarations, hasNonGlobalAugmentationExternalModuleSymbol) &&
+                    (ignoreQualification || canQualifySymbol(symbolFromSymbolTable, meaning));
+            }
+            function trySymbolTable(symbols, ignoreQualification) {
+                // If symbol is directly available by its name in the symbol table
+                if (isAccessible(symbols.get(symbol.escapedName), /*resolvedAliasSymbol*/ undefined, ignoreQualification)) {
+                    return [symbol];
+                }
+                // Check if symbol is any of the alias
+                return ts.forEachEntry(symbols, function (symbolFromSymbolTable) {
+                    if (symbolFromSymbolTable.flags & 2097152 /* Alias */
+                        && symbolFromSymbolTable.escapedName !== "export=" /* ExportEquals */
+                        && symbolFromSymbolTable.escapedName !== "default" /* Default */
+                        && !(ts.isUMDExportSymbol(symbolFromSymbolTable) && enclosingDeclaration && ts.isExternalModule(ts.getSourceFileOfNode(enclosingDeclaration)))
+                        // If `!useOnlyExternalAliasing`, we can use any type of alias to get the name
+                        && (!useOnlyExternalAliasing || ts.some(symbolFromSymbolTable.declarations, ts.isExternalModuleImportEqualsDeclaration))) {
+                        var resolvedImportedSymbol = resolveAlias(symbolFromSymbolTable);
+                        if (isAccessible(symbolFromSymbolTable, resolvedImportedSymbol, ignoreQualification)) {
+                            return [symbolFromSymbolTable];
+                        }
+                        // Look in the exported members, if we can find accessibleSymbolChain, symbol is accessible using this chain
+                        // but only if the symbolFromSymbolTable can be qualified
+                        var candidateTable = getExportsOfSymbol(resolvedImportedSymbol);
+                        var accessibleSymbolsFromExports = candidateTable && getAccessibleSymbolChainFromSymbolTable(candidateTable, /*ignoreQualification*/ true);
+                        if (accessibleSymbolsFromExports && canQualifySymbol(symbolFromSymbolTable, getQualifiedLeftMeaning(meaning))) {
+                            return [symbolFromSymbolTable].concat(accessibleSymbolsFromExports);
+                        }
+                    }
+                    if (symbolFromSymbolTable.escapedName === symbol.escapedName && symbolFromSymbolTable.exportSymbol) {
+                        if (isAccessible(getMergedSymbol(symbolFromSymbolTable.exportSymbol), /*aliasSymbol*/ undefined, ignoreQualification)) {
+                            return [symbol];
+                        }
+                    }
+                });
+            }
+        }
+        function needsQualification(symbol, enclosingDeclaration, meaning) {
+            var qualify = false;
+            forEachSymbolTableInScope(enclosingDeclaration, function (symbolTable) {
+                // If symbol of this name is not available in the symbol table we are ok
+                var symbolFromSymbolTable = getMergedSymbol(symbolTable.get(symbol.escapedName));
+                if (!symbolFromSymbolTable) {
+                    // Continue to the next symbol table
+                    return false;
+                }
+                // If the symbol with this name is present it should refer to the symbol
+                if (symbolFromSymbolTable === symbol) {
+                    // No need to qualify
+                    return true;
+                }
+                // Qualify if the symbol from symbol table has same meaning as expected
+                symbolFromSymbolTable = (symbolFromSymbolTable.flags & 2097152 /* Alias */ && !ts.getDeclarationOfKind(symbolFromSymbolTable, 252 /* ExportSpecifier */)) ? resolveAlias(symbolFromSymbolTable) : symbolFromSymbolTable;
+                if (symbolFromSymbolTable.flags & meaning) {
+                    qualify = true;
+                    return true;
+                }
+                // Continue to the next symbol table
+                return false;
+            });
+            return qualify;
+        }
+        function isPropertyOrMethodDeclarationSymbol(symbol) {
+            if (symbol.declarations && symbol.declarations.length) {
+                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                    var declaration = _a[_i];
+                    switch (declaration.kind) {
+                        case 152 /* PropertyDeclaration */:
+                        case 154 /* MethodDeclaration */:
+                        case 156 /* GetAccessor */:
+                        case 157 /* SetAccessor */:
+                            continue;
+                        default:
+                            return false;
+                    }
+                }
+                return true;
+            }
+            return false;
+        }
+        function isTypeSymbolAccessible(typeSymbol, enclosingDeclaration) {
+            var access = isSymbolAccessible(typeSymbol, enclosingDeclaration, 67901928 /* Type */, /*shouldComputeAliasesToMakeVisible*/ false);
+            return access.accessibility === 0 /* Accessible */;
+        }
+        function isValueSymbolAccessible(typeSymbol, enclosingDeclaration) {
+            var access = isSymbolAccessible(typeSymbol, enclosingDeclaration, 67216319 /* Value */, /*shouldComputeAliasesToMakeVisible*/ false);
+            return access.accessibility === 0 /* Accessible */;
+        }
+        /**
+         * Check if the given symbol in given enclosing declaration is accessible and mark all associated alias to be visible if requested
+         *
+         * @param symbol a Symbol to check if accessible
+         * @param enclosingDeclaration a Node containing reference to the symbol
+         * @param meaning a SymbolFlags to check if such meaning of the symbol is accessible
+         * @param shouldComputeAliasToMakeVisible a boolean value to indicate whether to return aliases to be mark visible in case the symbol is accessible
+         */
+        function isSymbolAccessible(symbol, enclosingDeclaration, meaning, shouldComputeAliasesToMakeVisible) {
+            if (symbol && enclosingDeclaration) {
+                var initialSymbol = symbol;
+                var meaningToLook = meaning;
+                while (symbol) {
+                    // Symbol is accessible if it by itself is accessible
+                    var accessibleSymbolChain = getAccessibleSymbolChain(symbol, enclosingDeclaration, meaningToLook, /*useOnlyExternalAliasing*/ false);
+                    if (accessibleSymbolChain) {
+                        var hasAccessibleDeclarations = hasVisibleDeclarations(accessibleSymbolChain[0], shouldComputeAliasesToMakeVisible);
+                        if (!hasAccessibleDeclarations) {
+                            return {
+                                accessibility: 1 /* NotAccessible */,
+                                errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning),
+                                errorModuleName: symbol !== initialSymbol ? symbolToString(symbol, enclosingDeclaration, 1920 /* Namespace */) : undefined,
+                            };
+                        }
+                        return hasAccessibleDeclarations;
+                    }
+                    else {
+                        if (ts.some(symbol.declarations, hasNonGlobalAugmentationExternalModuleSymbol)) {
+                            // Any meaning of a module symbol is always accessible via an `import` type
+                            return {
+                                accessibility: 0 /* Accessible */
+                            };
+                        }
+                    }
+                    // If we haven't got the accessible symbol, it doesn't mean the symbol is actually inaccessible.
+                    // It could be a qualified symbol and hence verify the path
+                    // e.g.:
+                    // module m {
+                    //     export class c {
+                    //     }
+                    // }
+                    // const x: typeof m.c
+                    // In the above example when we start with checking if typeof m.c symbol is accessible,
+                    // we are going to see if c can be accessed in scope directly.
+                    // But it can't, hence the accessible is going to be undefined, but that doesn't mean m.c is inaccessible
+                    // It is accessible if the parent m is accessible because then m.c can be accessed through qualification
+                    meaningToLook = getQualifiedLeftMeaning(meaning);
+                    symbol = getContainerOfSymbol(symbol);
+                }
+                // This could be a symbol that is not exported in the external module
+                // or it could be a symbol from different external module that is not aliased and hence cannot be named
+                var symbolExternalModule = ts.forEach(initialSymbol.declarations, getExternalModuleContainer);
+                if (symbolExternalModule) {
+                    var enclosingExternalModule = getExternalModuleContainer(enclosingDeclaration);
+                    if (symbolExternalModule !== enclosingExternalModule) {
+                        // name from different external module that is not visible
+                        return {
+                            accessibility: 2 /* CannotBeNamed */,
+                            errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning),
+                            errorModuleName: symbolToString(symbolExternalModule)
+                        };
+                    }
+                }
+                // Just a local name that is not accessible
+                return {
+                    accessibility: 1 /* NotAccessible */,
+                    errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning),
+                };
+            }
+            return { accessibility: 0 /* Accessible */ };
+            function getExternalModuleContainer(declaration) {
+                var node = ts.findAncestor(declaration, hasExternalModuleSymbol);
+                return node && getSymbolOfNode(node);
+            }
+        }
+        function hasExternalModuleSymbol(declaration) {
+            return ts.isAmbientModule(declaration) || (declaration.kind === 274 /* SourceFile */ && ts.isExternalOrCommonJsModule(declaration));
+        }
+        function hasNonGlobalAugmentationExternalModuleSymbol(declaration) {
+            return ts.isModuleWithStringLiteralName(declaration) || (declaration.kind === 274 /* SourceFile */ && ts.isExternalOrCommonJsModule(declaration));
+        }
+        function hasVisibleDeclarations(symbol, shouldComputeAliasToMakeVisible) {
+            var aliasesToMakeVisible;
+            if (!ts.every(symbol.declarations, getIsDeclarationVisible)) {
+                return undefined;
+            }
+            return { accessibility: 0 /* Accessible */, aliasesToMakeVisible: aliasesToMakeVisible };
+            function getIsDeclarationVisible(declaration) {
+                if (!isDeclarationVisible(declaration)) {
+                    // Mark the unexported alias as visible if its parent is visible
+                    // because these kind of aliases can be used to name types in declaration file
+                    var anyImportSyntax = getAnyImportSyntax(declaration);
+                    if (anyImportSyntax &&
+                        !ts.hasModifier(anyImportSyntax, 1 /* Export */) && // import clause without export
+                        isDeclarationVisible(anyImportSyntax.parent)) {
+                        return addVisibleAlias(declaration, anyImportSyntax);
+                    }
+                    else if (ts.isVariableDeclaration(declaration) && ts.isVariableStatement(declaration.parent.parent) &&
+                        !ts.hasModifier(declaration.parent.parent, 1 /* Export */) && // unexported variable statement
+                        isDeclarationVisible(declaration.parent.parent.parent)) {
+                        return addVisibleAlias(declaration, declaration.parent.parent);
+                    }
+                    else if (ts.isLateVisibilityPaintedStatement(declaration) // unexported top-level statement
+                        && !ts.hasModifier(declaration, 1 /* Export */)
+                        && isDeclarationVisible(declaration.parent)) {
+                        return addVisibleAlias(declaration, declaration);
+                    }
+                    // Declaration is not visible
+                    return false;
+                }
+                return true;
+            }
+            function addVisibleAlias(declaration, aliasingStatement) {
+                // In function "buildTypeDisplay" where we decide whether to write type-alias or serialize types,
+                // we want to just check if type- alias is accessible or not but we don't care about emitting those alias at that time
+                // since we will do the emitting later in trackSymbol.
+                if (shouldComputeAliasToMakeVisible) {
+                    getNodeLinks(declaration).isVisible = true;
+                    aliasesToMakeVisible = ts.appendIfUnique(aliasesToMakeVisible, aliasingStatement);
+                }
+                return true;
+            }
+        }
+        function isEntityNameVisible(entityName, enclosingDeclaration) {
+            // get symbol of the first identifier of the entityName
+            var meaning;
+            if (entityName.parent.kind === 165 /* TypeQuery */ ||
+                ts.isExpressionWithTypeArgumentsInClassExtendsClause(entityName.parent) ||
+                entityName.parent.kind === 147 /* ComputedPropertyName */) {
+                // Typeof value
+                meaning = 67216319 /* Value */ | 1048576 /* ExportValue */;
+            }
+            else if (entityName.kind === 146 /* QualifiedName */ || entityName.kind === 185 /* PropertyAccessExpression */ ||
+                entityName.parent.kind === 243 /* ImportEqualsDeclaration */) {
+                // Left identifier from type reference or TypeAlias
+                // Entity name of the import declaration
+                meaning = 1920 /* Namespace */;
+            }
+            else {
+                // Type Reference or TypeAlias entity = Identifier
+                meaning = 67901928 /* Type */;
+            }
+            var firstIdentifier = getFirstIdentifier(entityName);
+            var symbol = resolveName(enclosingDeclaration, firstIdentifier.escapedText, meaning, /*nodeNotFoundErrorMessage*/ undefined, /*nameArg*/ undefined, /*isUse*/ false);
+            // Verify if the symbol is accessible
+            return (symbol && hasVisibleDeclarations(symbol, /*shouldComputeAliasToMakeVisible*/ true)) || {
+                accessibility: 1 /* NotAccessible */,
+                errorSymbolName: ts.getTextOfNode(firstIdentifier),
+                errorNode: firstIdentifier
+            };
+        }
+        function symbolToString(symbol, enclosingDeclaration, meaning, flags, writer) {
+            if (flags === void 0) { flags = 4 /* AllowAnyNodeKind */; }
+            var nodeFlags = 3112960 /* IgnoreErrors */;
+            if (flags & 2 /* UseOnlyExternalAliasing */) {
+                nodeFlags |= 128 /* UseOnlyExternalAliasing */;
+            }
+            if (flags & 1 /* WriteTypeParametersOrArguments */) {
+                nodeFlags |= 512 /* WriteTypeParametersInQualifiedName */;
+            }
+            if (flags & 8 /* UseAliasDefinedOutsideCurrentScope */) {
+                nodeFlags |= 16384 /* UseAliasDefinedOutsideCurrentScope */;
+            }
+            var builder = flags & 4 /* AllowAnyNodeKind */ ? nodeBuilder.symbolToExpression : nodeBuilder.symbolToEntityName;
+            return writer ? symbolToStringWorker(writer).getText() : ts.usingSingleLineStringWriter(symbolToStringWorker);
+            function symbolToStringWorker(writer) {
+                var entity = builder(symbol, meaning, enclosingDeclaration, nodeFlags); // TODO: GH#18217
+                var printer = ts.createPrinter({ removeComments: true });
+                var sourceFile = enclosingDeclaration && ts.getSourceFileOfNode(enclosingDeclaration);
+                printer.writeNode(4 /* Unspecified */, entity, /*sourceFile*/ sourceFile, writer);
+                return writer;
+            }
+        }
+        function signatureToString(signature, enclosingDeclaration, flags, kind, writer) {
+            if (flags === void 0) { flags = 0 /* None */; }
+            return writer ? signatureToStringWorker(writer).getText() : ts.usingSingleLineStringWriter(signatureToStringWorker);
+            function signatureToStringWorker(writer) {
+                var sigOutput;
+                if (flags & 262144 /* WriteArrowStyleSignature */) {
+                    sigOutput = kind === 1 /* Construct */ ? 164 /* ConstructorType */ : 163 /* FunctionType */;
+                }
+                else {
+                    sigOutput = kind === 1 /* Construct */ ? 159 /* ConstructSignature */ : 158 /* CallSignature */;
+                }
+                var sig = nodeBuilder.signatureToSignatureDeclaration(signature, sigOutput, enclosingDeclaration, toNodeBuilderFlags(flags) | 3112960 /* IgnoreErrors */ | 512 /* WriteTypeParametersInQualifiedName */);
+                var printer = ts.createPrinter({ removeComments: true, omitTrailingSemicolon: true });
+                var sourceFile = enclosingDeclaration && ts.getSourceFileOfNode(enclosingDeclaration);
+                printer.writeNode(4 /* Unspecified */, sig, /*sourceFile*/ sourceFile, writer); // TODO: GH#18217
+                return writer;
+            }
+        }
+        function typeToString(type, enclosingDeclaration, flags, writer) {
+            if (flags === void 0) { flags = 1048576 /* AllowUniqueESSymbolType */ | 16384 /* UseAliasDefinedOutsideCurrentScope */; }
+            if (writer === void 0) { writer = ts.createTextWriter(""); }
+            var typeNode = nodeBuilder.typeToTypeNode(type, enclosingDeclaration, toNodeBuilderFlags(flags) | 3112960 /* IgnoreErrors */, writer);
+            if (typeNode === undefined)
+                return ts.Debug.fail("should always get typenode");
+            var options = { removeComments: true };
+            var printer = ts.createPrinter(options);
+            var sourceFile = enclosingDeclaration && ts.getSourceFileOfNode(enclosingDeclaration);
+            printer.writeNode(4 /* Unspecified */, typeNode, /*sourceFile*/ sourceFile, writer);
+            var result = writer.getText();
+            var maxLength = compilerOptions.noErrorTruncation || flags & 1 /* NoTruncation */ ? undefined : 100;
+            if (maxLength && result && result.length >= maxLength) {
+                return result.substr(0, maxLength - "...".length) + "...";
+            }
+            return result;
+        }
+        function toNodeBuilderFlags(flags) {
+            if (flags === void 0) { flags = 0 /* None */; }
+            return flags & 9469291 /* NodeBuilderFlagsMask */;
+        }
+        function createNodeBuilder() {
+            return {
+                typeToTypeNode: function (type, enclosingDeclaration, flags, tracker) {
+                    ts.Debug.assert(enclosingDeclaration === undefined || (enclosingDeclaration.flags & 8 /* Synthesized */) === 0);
+                    var context = createNodeBuilderContext(enclosingDeclaration, flags, tracker);
+                    var resultingNode = typeToTypeNodeHelper(type, context);
+                    var result = context.encounteredError ? undefined : resultingNode;
+                    return result;
+                },
+                indexInfoToIndexSignatureDeclaration: function (indexInfo, kind, enclosingDeclaration, flags, tracker) {
+                    ts.Debug.assert(enclosingDeclaration === undefined || (enclosingDeclaration.flags & 8 /* Synthesized */) === 0);
+                    var context = createNodeBuilderContext(enclosingDeclaration, flags, tracker);
+                    var resultingNode = indexInfoToIndexSignatureDeclarationHelper(indexInfo, kind, context);
+                    var result = context.encounteredError ? undefined : resultingNode;
+                    return result; // TODO: GH#18217
+                },
+                signatureToSignatureDeclaration: function (signature, kind, enclosingDeclaration, flags, tracker) {
+                    ts.Debug.assert(enclosingDeclaration === undefined || (enclosingDeclaration.flags & 8 /* Synthesized */) === 0);
+                    var context = createNodeBuilderContext(enclosingDeclaration, flags, tracker);
+                    var resultingNode = signatureToSignatureDeclarationHelper(signature, kind, context);
+                    var result = context.encounteredError ? undefined : resultingNode;
+                    return result;
+                },
+                symbolToEntityName: function (symbol, meaning, enclosingDeclaration, flags, tracker) {
+                    ts.Debug.assert(enclosingDeclaration === undefined || (enclosingDeclaration.flags & 8 /* Synthesized */) === 0);
+                    var context = createNodeBuilderContext(enclosingDeclaration, flags, tracker);
+                    var resultingNode = symbolToName(symbol, context, meaning, /*expectsIdentifier*/ false);
+                    var result = context.encounteredError ? undefined : resultingNode;
+                    return result;
+                },
+                symbolToExpression: function (symbol, meaning, enclosingDeclaration, flags, tracker) {
+                    ts.Debug.assert(enclosingDeclaration === undefined || (enclosingDeclaration.flags & 8 /* Synthesized */) === 0);
+                    var context = createNodeBuilderContext(enclosingDeclaration, flags, tracker);
+                    var resultingNode = symbolToExpression(symbol, context, meaning);
+                    var result = context.encounteredError ? undefined : resultingNode;
+                    return result;
+                },
+                symbolToTypeParameterDeclarations: function (symbol, enclosingDeclaration, flags, tracker) {
+                    ts.Debug.assert(enclosingDeclaration === undefined || (enclosingDeclaration.flags & 8 /* Synthesized */) === 0);
+                    var context = createNodeBuilderContext(enclosingDeclaration, flags, tracker);
+                    var resultingNode = typeParametersToTypeParameterDeclarations(symbol, context);
+                    var result = context.encounteredError ? undefined : resultingNode;
+                    return result;
+                },
+                symbolToParameterDeclaration: function (symbol, enclosingDeclaration, flags, tracker) {
+                    ts.Debug.assert(enclosingDeclaration === undefined || (enclosingDeclaration.flags & 8 /* Synthesized */) === 0);
+                    var context = createNodeBuilderContext(enclosingDeclaration, flags, tracker);
+                    var resultingNode = symbolToParameterDeclaration(symbol, context);
+                    var result = context.encounteredError ? undefined : resultingNode;
+                    return result;
+                },
+                typeParameterToDeclaration: function (parameter, enclosingDeclaration, flags, tracker) {
+                    ts.Debug.assert(enclosingDeclaration === undefined || (enclosingDeclaration.flags & 8 /* Synthesized */) === 0);
+                    var context = createNodeBuilderContext(enclosingDeclaration, flags, tracker);
+                    var resultingNode = typeParameterToDeclaration(parameter, context);
+                    var result = context.encounteredError ? undefined : resultingNode;
+                    return result;
+                },
+            };
+            function createNodeBuilderContext(enclosingDeclaration, flags, tracker) {
+                return {
+                    enclosingDeclaration: enclosingDeclaration,
+                    flags: flags || 0 /* None */,
+                    tracker: tracker && tracker.trackSymbol ? tracker : { trackSymbol: ts.noop },
+                    encounteredError: false,
+                    visitedSymbols: undefined,
+                    inferTypeParameters: undefined
+                };
+            }
+            function typeToTypeNodeHelper(type, context) {
+                if (cancellationToken && cancellationToken.throwIfCancellationRequested) {
+                    cancellationToken.throwIfCancellationRequested();
+                }
+                var inTypeAlias = context.flags & 8388608 /* InTypeAlias */;
+                context.flags &= ~8388608 /* InTypeAlias */;
+                if (!type) {
+                    context.encounteredError = true;
+                    return undefined; // TODO: GH#18217
+                }
+                if (type.flags & 1 /* Any */) {
+                    return ts.createKeywordTypeNode(119 /* AnyKeyword */);
+                }
+                if (type.flags & 2 /* Unknown */) {
+                    return ts.createKeywordTypeNode(142 /* UnknownKeyword */);
+                }
+                if (type.flags & 4 /* String */) {
+                    return ts.createKeywordTypeNode(137 /* StringKeyword */);
+                }
+                if (type.flags & 8 /* Number */) {
+                    return ts.createKeywordTypeNode(134 /* NumberKeyword */);
+                }
+                if (type.flags & 16 /* Boolean */) {
+                    return ts.createKeywordTypeNode(122 /* BooleanKeyword */);
+                }
+                if (type.flags & 512 /* EnumLiteral */ && !(type.flags & 262144 /* Union */)) {
+                    var parentSymbol = getParentOfSymbol(type.symbol);
+                    var parentName = symbolToName(parentSymbol, context, 67901928 /* Type */, /*expectsIdentifier*/ false);
+                    var enumLiteralName = getDeclaredTypeOfSymbol(parentSymbol) === type ? parentName : ts.createQualifiedName(parentName, ts.symbolName(type.symbol));
+                    return ts.createTypeReferenceNode(enumLiteralName, /*typeArguments*/ undefined);
+                }
+                if (type.flags & 544 /* EnumLike */) {
+                    var name = symbolToName(type.symbol, context, 67901928 /* Type */, /*expectsIdentifier*/ false);
+                    return ts.createTypeReferenceNode(name, /*typeArguments*/ undefined);
+                }
+                if (type.flags & (64 /* StringLiteral */)) {
+                    return ts.createLiteralTypeNode(ts.setEmitFlags(ts.createLiteral(type.value), 16777216 /* NoAsciiEscaping */));
+                }
+                if (type.flags & (128 /* NumberLiteral */)) {
+                    return ts.createLiteralTypeNode((ts.createLiteral(type.value)));
+                }
+                if (type.flags & 256 /* BooleanLiteral */) {
+                    return type.intrinsicName === "true" ? ts.createTrue() : ts.createFalse();
+                }
+                if (type.flags & 2048 /* UniqueESSymbol */) {
+                    if (!(context.flags & 1048576 /* AllowUniqueESSymbolType */)) {
+                        if (isValueSymbolAccessible(type.symbol, context.enclosingDeclaration)) {
+                            return symbolToTypeNode(type.symbol, context, 67216319 /* Value */);
+                        }
+                        if (context.tracker.reportInaccessibleUniqueSymbolError) {
+                            context.tracker.reportInaccessibleUniqueSymbolError();
+                        }
+                    }
+                    return ts.createTypeOperatorNode(141 /* UniqueKeyword */, ts.createKeywordTypeNode(138 /* SymbolKeyword */));
+                }
+                if (type.flags & 4096 /* Void */) {
+                    return ts.createKeywordTypeNode(105 /* VoidKeyword */);
+                }
+                if (type.flags & 8192 /* Undefined */) {
+                    return ts.createKeywordTypeNode(140 /* UndefinedKeyword */);
+                }
+                if (type.flags & 16384 /* Null */) {
+                    return ts.createKeywordTypeNode(95 /* NullKeyword */);
+                }
+                if (type.flags & 32768 /* Never */) {
+                    return ts.createKeywordTypeNode(131 /* NeverKeyword */);
+                }
+                if (type.flags & 1024 /* ESSymbol */) {
+                    return ts.createKeywordTypeNode(138 /* SymbolKeyword */);
+                }
+                if (type.flags & 16777216 /* NonPrimitive */) {
+                    return ts.createKeywordTypeNode(135 /* ObjectKeyword */);
+                }
+                if (type.flags & 65536 /* TypeParameter */ && type.isThisType) {
+                    if (context.flags & 4194304 /* InObjectTypeLiteral */) {
+                        if (!context.encounteredError && !(context.flags & 32768 /* AllowThisInObjectLiteral */)) {
+                            context.encounteredError = true;
+                        }
+                        if (context.tracker.reportInaccessibleThisError) {
+                            context.tracker.reportInaccessibleThisError();
+                        }
+                    }
+                    return ts.createThis();
+                }
+                var objectFlags = ts.getObjectFlags(type);
+                if (objectFlags & 4 /* Reference */) {
+                    ts.Debug.assert(!!(type.flags & 131072 /* Object */));
+                    return typeReferenceToTypeNode(type);
+                }
+                if (type.flags & 65536 /* TypeParameter */ || objectFlags & 3 /* ClassOrInterface */) {
+                    if (type.flags & 65536 /* TypeParameter */ && ts.contains(context.inferTypeParameters, type)) {
+                        return ts.createInferTypeNode(typeParameterToDeclarationWithConstraint(type, context, /*constraintNode*/ undefined));
+                    }
+                    if (context.flags & 4 /* GenerateNamesForShadowedTypeParams */ &&
+                        type.flags & 65536 /* TypeParameter */ &&
+                        ts.length(type.symbol.declarations) &&
+                        ts.isTypeParameterDeclaration(type.symbol.declarations[0]) &&
+                        typeParameterShadowsNameInScope(type, context) &&
+                        !isTypeSymbolAccessible(type.symbol, context.enclosingDeclaration)) {
+                        return ts.createTypeReferenceNode(ts.getGeneratedNameForNode(type.symbol.declarations[0].name, 16 /* Optimistic */ | 8 /* ReservedInNestedScopes */), /*typeArguments*/ undefined);
+                    }
+                    // Ignore constraint/default when creating a usage (as opposed to declaration) of a type parameter.
+                    return type.symbol
+                        ? symbolToTypeNode(type.symbol, context, 67901928 /* Type */)
+                        : ts.createTypeReferenceNode(ts.createIdentifier("?"), /*typeArguments*/ undefined);
+                }
+                if (!inTypeAlias && type.aliasSymbol && (context.flags & 16384 /* UseAliasDefinedOutsideCurrentScope */ || isTypeSymbolAccessible(type.aliasSymbol, context.enclosingDeclaration))) {
+                    var typeArgumentNodes = mapToTypeNodes(type.aliasTypeArguments, context);
+                    if (isReservedMemberName(type.aliasSymbol.escapedName) && !(type.aliasSymbol.flags & 32 /* Class */))
+                        return ts.createTypeReferenceNode(ts.createIdentifier(""), typeArgumentNodes);
+                    return symbolToTypeNode(type.aliasSymbol, context, 67901928 /* Type */, typeArgumentNodes);
+                }
+                if (type.flags & (262144 /* Union */ | 524288 /* Intersection */)) {
+                    var types = type.flags & 262144 /* Union */ ? formatUnionTypes(type.types) : type.types;
+                    var typeNodes = mapToTypeNodes(types, context);
+                    if (typeNodes && typeNodes.length > 0) {
+                        var unionOrIntersectionTypeNode = ts.createUnionOrIntersectionTypeNode(type.flags & 262144 /* Union */ ? 169 /* UnionType */ : 170 /* IntersectionType */, typeNodes);
+                        return unionOrIntersectionTypeNode;
+                    }
+                    else {
+                        if (!context.encounteredError && !(context.flags & 262144 /* AllowEmptyUnionOrIntersection */)) {
+                            context.encounteredError = true;
+                        }
+                        return undefined; // TODO: GH#18217
+                    }
+                }
+                if (objectFlags & (16 /* Anonymous */ | 32 /* Mapped */)) {
+                    ts.Debug.assert(!!(type.flags & 131072 /* Object */));
+                    // The type is an object literal type.
+                    return createAnonymousTypeNode(type);
+                }
+                if (type.flags & 1048576 /* Index */) {
+                    var indexedType = type.type;
+                    var indexTypeNode = typeToTypeNodeHelper(indexedType, context);
+                    return ts.createTypeOperatorNode(indexTypeNode);
+                }
+                if (type.flags & 2097152 /* IndexedAccess */) {
+                    var objectTypeNode = typeToTypeNodeHelper(type.objectType, context);
+                    var indexTypeNode = typeToTypeNodeHelper(type.indexType, context);
+                    return ts.createIndexedAccessTypeNode(objectTypeNode, indexTypeNode);
+                }
+                if (type.flags & 4194304 /* Conditional */) {
+                    var checkTypeNode = typeToTypeNodeHelper(type.checkType, context);
+                    var saveInferTypeParameters = context.inferTypeParameters;
+                    context.inferTypeParameters = type.root.inferTypeParameters;
+                    var extendsTypeNode = typeToTypeNodeHelper(type.extendsType, context);
+                    context.inferTypeParameters = saveInferTypeParameters;
+                    var trueTypeNode = typeToTypeNodeHelper(getTrueTypeFromConditionalType(type), context);
+                    var falseTypeNode = typeToTypeNodeHelper(getFalseTypeFromConditionalType(type), context);
+                    return ts.createConditionalTypeNode(checkTypeNode, extendsTypeNode, trueTypeNode, falseTypeNode);
+                }
+                if (type.flags & 8388608 /* Substitution */) {
+                    return typeToTypeNodeHelper(type.typeVariable, context);
+                }
+                return ts.Debug.fail("Should be unreachable.");
+                function createMappedTypeNodeFromType(type) {
+                    ts.Debug.assert(!!(type.flags & 131072 /* Object */));
+                    var readonlyToken = type.declaration.readonlyToken ? ts.createToken(type.declaration.readonlyToken.kind) : undefined;
+                    var questionToken = type.declaration.questionToken ? ts.createToken(type.declaration.questionToken.kind) : undefined;
+                    var appropriateConstraintTypeNode;
+                    if (isMappedTypeWithKeyofConstraintDeclaration(type)) {
+                        // We have a { [P in keyof T]: X }
+                        // We do this to ensure we retain the toplevel keyof-ness of the type which may be lost due to keyof distribution during `getConstraintTypeFromMappedType`
+                        appropriateConstraintTypeNode = ts.createTypeOperatorNode(typeToTypeNodeHelper(getModifiersTypeFromMappedType(type), context));
+                    }
+                    else {
+                        appropriateConstraintTypeNode = typeToTypeNodeHelper(getConstraintTypeFromMappedType(type), context);
+                    }
+                    var typeParameterNode = typeParameterToDeclarationWithConstraint(getTypeParameterFromMappedType(type), context, appropriateConstraintTypeNode);
+                    var templateTypeNode = typeToTypeNodeHelper(getTemplateTypeFromMappedType(type), context);
+                    var mappedTypeNode = ts.createMappedTypeNode(readonlyToken, typeParameterNode, questionToken, templateTypeNode);
+                    return ts.setEmitFlags(mappedTypeNode, 1 /* SingleLine */);
+                }
+                function createAnonymousTypeNode(type) {
+                    var symbol = type.symbol;
+                    var id;
+                    if (symbol) {
+                        var isConstructorObject = ts.getObjectFlags(type) & 16 /* Anonymous */ && type.symbol && type.symbol.flags & 32 /* Class */;
+                        id = (isConstructorObject ? "+" : "") + getSymbolId(symbol);
+                        if (isJavaScriptConstructor(symbol.valueDeclaration)) {
+                            // Instance and static types share the same symbol; only add 'typeof' for the static side.
+                            var isInstanceType = type === getInferredClassType(symbol) ? 67901928 /* Type */ : 67216319 /* Value */;
+                            return symbolToTypeNode(symbol, context, isInstanceType);
+                        }
+                        // Always use 'typeof T' for type of class, enum, and module objects
+                        else if (symbol.flags & 32 /* Class */ && !getBaseTypeVariableOfClass(symbol) && !(symbol.valueDeclaration.kind === 205 /* ClassExpression */ && context.flags & 2048 /* WriteClassExpressionAsTypeLiteral */) ||
+                            symbol.flags & (384 /* Enum */ | 512 /* ValueModule */) ||
+                            shouldWriteTypeOfFunctionSymbol()) {
+                            return symbolToTypeNode(symbol, context, 67216319 /* Value */);
+                        }
+                        else if (context.visitedSymbols && context.visitedSymbols.has(id)) {
+                            // If type is an anonymous type literal in a type alias declaration, use type alias name
+                            var typeAlias = getTypeAliasForTypeLiteral(type);
+                            if (typeAlias) {
+                                // The specified symbol flags need to be reinterpreted as type flags
+                                return symbolToTypeNode(typeAlias, context, 67901928 /* Type */);
+                            }
+                            else {
+                                return ts.createKeywordTypeNode(119 /* AnyKeyword */);
+                            }
+                        }
+                        else {
+                            // Since instantiations of the same anonymous type have the same symbol, tracking symbols instead
+                            // of types allows us to catch circular references to instantiations of the same anonymous type
+                            if (!context.visitedSymbols) {
+                                context.visitedSymbols = ts.createMap();
+                            }
+                            context.visitedSymbols.set(id, true);
+                            var result = createTypeNodeFromObjectType(type);
+                            context.visitedSymbols.delete(id);
+                            return result;
+                        }
+                    }
+                    else {
+                        // Anonymous types without a symbol are never circular.
+                        return createTypeNodeFromObjectType(type);
+                    }
+                    function shouldWriteTypeOfFunctionSymbol() {
+                        var isStaticMethodSymbol = !!(symbol.flags & 8192 /* Method */) && // typeof static method
+                            ts.some(symbol.declarations, function (declaration) { return ts.hasModifier(declaration, 32 /* Static */); });
+                        var isNonLocalFunctionSymbol = !!(symbol.flags & 16 /* Function */) &&
+                            (symbol.parent || // is exported function symbol
+                                ts.forEach(symbol.declarations, function (declaration) {
+                                    return declaration.parent.kind === 274 /* SourceFile */ || declaration.parent.kind === 240 /* ModuleBlock */;
+                                }));
+                        if (isStaticMethodSymbol || isNonLocalFunctionSymbol) {
+                            // typeof is allowed only for static/non local functions
+                            return (!!(context.flags & 4096 /* UseTypeOfFunction */) || (context.visitedSymbols && context.visitedSymbols.has(id))) && // it is type of the symbol uses itself recursively
+                                (!(context.flags & 8 /* UseStructuralFallback */) || isValueSymbolAccessible(symbol, context.enclosingDeclaration)); // TODO: GH#18217 // And the build is going to succeed without visibility error or there is no structural fallback allowed
+                        }
+                    }
+                }
+                function createTypeNodeFromObjectType(type) {
+                    if (isGenericMappedType(type)) {
+                        return createMappedTypeNodeFromType(type);
+                    }
+                    var resolved = resolveStructuredTypeMembers(type);
+                    if (!resolved.properties.length && !resolved.stringIndexInfo && !resolved.numberIndexInfo) {
+                        if (!resolved.callSignatures.length && !resolved.constructSignatures.length) {
+                            return ts.setEmitFlags(ts.createTypeLiteralNode(/*members*/ undefined), 1 /* SingleLine */);
+                        }
+                        if (resolved.callSignatures.length === 1 && !resolved.constructSignatures.length) {
+                            var signature = resolved.callSignatures[0];
+                            var signatureNode = signatureToSignatureDeclarationHelper(signature, 163 /* FunctionType */, context);
+                            return signatureNode;
+                        }
+                        if (resolved.constructSignatures.length === 1 && !resolved.callSignatures.length) {
+                            var signature = resolved.constructSignatures[0];
+                            var signatureNode = signatureToSignatureDeclarationHelper(signature, 164 /* ConstructorType */, context);
+                            return signatureNode;
+                        }
+                    }
+                    var savedFlags = context.flags;
+                    context.flags |= 4194304 /* InObjectTypeLiteral */;
+                    var members = createTypeNodesFromResolvedType(resolved);
+                    context.flags = savedFlags;
+                    var typeLiteralNode = ts.createTypeLiteralNode(members);
+                    return ts.setEmitFlags(typeLiteralNode, (context.flags & 1024 /* MultilineObjectLiterals */) ? 0 : 1 /* SingleLine */);
+                }
+                function typeReferenceToTypeNode(type) {
+                    var typeArguments = type.typeArguments || ts.emptyArray;
+                    if (type.target === globalArrayType) {
+                        if (context.flags & 2 /* WriteArrayAsGenericType */) {
+                            var typeArgumentNode = typeToTypeNodeHelper(typeArguments[0], context);
+                            return ts.createTypeReferenceNode("Array", [typeArgumentNode]);
+                        }
+                        var elementType = typeToTypeNodeHelper(typeArguments[0], context);
+                        return ts.createArrayTypeNode(elementType);
+                    }
+                    else if (type.target.objectFlags & 8 /* Tuple */) {
+                        if (typeArguments.length > 0) {
+                            var tupleConstituentNodes = mapToTypeNodes(typeArguments.slice(0, getTypeReferenceArity(type)), context);
+                            if (tupleConstituentNodes && tupleConstituentNodes.length > 0) {
+                                return ts.createTupleTypeNode(tupleConstituentNodes);
+                            }
+                        }
+                        if (context.encounteredError || (context.flags & 524288 /* AllowEmptyTuple */)) {
+                            return ts.createTupleTypeNode([]);
+                        }
+                        context.encounteredError = true;
+                        return undefined; // TODO: GH#18217
+                    }
+                    else if (context.flags & 2048 /* WriteClassExpressionAsTypeLiteral */ &&
+                        type.symbol.valueDeclaration &&
+                        ts.isClassLike(type.symbol.valueDeclaration) &&
+                        !isValueSymbolAccessible(type.symbol, context.enclosingDeclaration)) {
+                        return createAnonymousTypeNode(type);
+                    }
+                    else {
+                        var outerTypeParameters = type.target.outerTypeParameters;
+                        var i = 0;
+                        var resultType = void 0;
+                        if (outerTypeParameters) {
+                            var length_1 = outerTypeParameters.length;
+                            while (i < length_1) {
+                                // Find group of type arguments for type parameters with the same declaring container.
+                                var start = i;
+                                var parent = getParentSymbolOfTypeParameter(outerTypeParameters[i]);
+                                do {
+                                    i++;
+                                } while (i < length_1 && getParentSymbolOfTypeParameter(outerTypeParameters[i]) === parent);
+                                // When type parameters are their own type arguments for the whole group (i.e. we have
+                                // the default outer type arguments), we don't show the group.
+                                if (!ts.rangeEquals(outerTypeParameters, typeArguments, start, i)) {
+                                    var typeArgumentSlice = mapToTypeNodes(typeArguments.slice(start, i), context);
+                                    var flags_2 = context.flags;
+                                    context.flags |= 16 /* ForbidIndexedAccessSymbolReferences */;
+                                    var ref = symbolToTypeNode(parent, context, 67901928 /* Type */, typeArgumentSlice);
+                                    context.flags = flags_2;
+                                    resultType = !resultType ? ref : appendReferenceToType(resultType, ref);
+                                }
+                            }
+                        }
+                        var typeArgumentNodes = void 0;
+                        if (typeArguments.length > 0) {
+                            var typeParameterCount = (type.target.typeParameters || ts.emptyArray).length;
+                            typeArgumentNodes = mapToTypeNodes(typeArguments.slice(i, typeParameterCount), context);
+                        }
+                        var flags = context.flags;
+                        context.flags |= 16 /* ForbidIndexedAccessSymbolReferences */;
+                        var finalRef = symbolToTypeNode(type.symbol, context, 67901928 /* Type */, typeArgumentNodes);
+                        context.flags = flags;
+                        return !resultType ? finalRef : appendReferenceToType(resultType, finalRef);
+                    }
+                }
+                function appendReferenceToType(root, ref) {
+                    if (ts.isImportTypeNode(root)) {
+                        // first shift type arguments
+                        var innerParams = root.typeArguments;
+                        if (root.qualifier) {
+                            (ts.isIdentifier(root.qualifier) ? root.qualifier : root.qualifier.right).typeArguments = innerParams;
+                        }
+                        root.typeArguments = ref.typeArguments;
+                        // then move qualifiers
+                        var ids = getAccessStack(ref);
+                        for (var _i = 0, ids_1 = ids; _i < ids_1.length; _i++) {
+                            var id = ids_1[_i];
+                            root.qualifier = root.qualifier ? ts.createQualifiedName(root.qualifier, id) : id;
+                        }
+                        return root;
+                    }
+                    else {
+                        // first shift type arguments
+                        var innerParams = root.typeArguments;
+                        (ts.isIdentifier(root.typeName) ? root.typeName : root.typeName.right).typeArguments = innerParams;
+                        root.typeArguments = ref.typeArguments;
+                        // then move qualifiers
+                        var ids = getAccessStack(ref);
+                        for (var _a = 0, ids_2 = ids; _a < ids_2.length; _a++) {
+                            var id = ids_2[_a];
+                            root.typeName = ts.createQualifiedName(root.typeName, id);
+                        }
+                        return root;
+                    }
+                }
+                function getAccessStack(ref) {
+                    var state = ref.typeName;
+                    var ids = [];
+                    while (!ts.isIdentifier(state)) {
+                        ids.unshift(state.right);
+                        state = state.left;
+                    }
+                    ids.unshift(state);
+                    return ids;
+                }
+                function createTypeNodesFromResolvedType(resolvedType) {
+                    var typeElements = [];
+                    for (var _i = 0, _a = resolvedType.callSignatures; _i < _a.length; _i++) {
+                        var signature = _a[_i];
+                        typeElements.push(signatureToSignatureDeclarationHelper(signature, 158 /* CallSignature */, context));
+                    }
+                    for (var _b = 0, _c = resolvedType.constructSignatures; _b < _c.length; _b++) {
+                        var signature = _c[_b];
+                        typeElements.push(signatureToSignatureDeclarationHelper(signature, 159 /* ConstructSignature */, context));
+                    }
+                    if (resolvedType.stringIndexInfo) {
+                        var indexInfo = resolvedType.objectFlags & 2048 /* ReverseMapped */ ?
+                            createIndexInfo(anyType, resolvedType.stringIndexInfo.isReadonly, resolvedType.stringIndexInfo.declaration) :
+                            resolvedType.stringIndexInfo;
+                        typeElements.push(indexInfoToIndexSignatureDeclarationHelper(indexInfo, 0 /* String */, context));
+                    }
+                    if (resolvedType.numberIndexInfo) {
+                        typeElements.push(indexInfoToIndexSignatureDeclarationHelper(resolvedType.numberIndexInfo, 1 /* Number */, context));
+                    }
+                    var properties = resolvedType.properties;
+                    if (!properties) {
+                        return typeElements;
+                    }
+                    for (var _d = 0, properties_1 = properties; _d < properties_1.length; _d++) {
+                        var propertySymbol = properties_1[_d];
+                        if (context.flags & 2048 /* WriteClassExpressionAsTypeLiteral */) {
+                            if (propertySymbol.flags & 4194304 /* Prototype */) {
+                                continue;
+                            }
+                            if (ts.getDeclarationModifierFlagsFromSymbol(propertySymbol) & (8 /* Private */ | 16 /* Protected */) && context.tracker.reportPrivateInBaseOfClassExpression) {
+                                context.tracker.reportPrivateInBaseOfClassExpression(ts.unescapeLeadingUnderscores(propertySymbol.escapedName));
+                            }
+                        }
+                        var propertyType = ts.getCheckFlags(propertySymbol) & 2048 /* ReverseMapped */ && context.flags & 33554432 /* InReverseMappedType */ ?
+                            anyType : getTypeOfSymbol(propertySymbol);
+                        var saveEnclosingDeclaration = context.enclosingDeclaration;
+                        context.enclosingDeclaration = undefined;
+                        if (ts.getCheckFlags(propertySymbol) & 1024 /* Late */) {
+                            var decl = ts.first(propertySymbol.declarations);
+                            if (context.tracker.trackSymbol && hasLateBindableName(decl)) {
+                                // get symbol of the first identifier of the entityName
+                                var firstIdentifier = getFirstIdentifier(decl.name.expression);
+                                var name = resolveName(firstIdentifier, firstIdentifier.escapedText, 67216319 /* Value */ | 1048576 /* ExportValue */, /*nodeNotFoundErrorMessage*/ undefined, /*nameArg*/ undefined, /*isUse*/ true);
+                                if (name) {
+                                    context.tracker.trackSymbol(name, saveEnclosingDeclaration, 67216319 /* Value */);
+                                }
+                            }
+                        }
+                        var propertyName = symbolToName(propertySymbol, context, 67216319 /* Value */, /*expectsIdentifier*/ true);
+                        context.enclosingDeclaration = saveEnclosingDeclaration;
+                        var optionalToken = propertySymbol.flags & 16777216 /* Optional */ ? ts.createToken(55 /* QuestionToken */) : undefined;
+                        if (propertySymbol.flags & (16 /* Function */ | 8192 /* Method */) && !getPropertiesOfObjectType(propertyType).length) {
+                            var signatures = getSignaturesOfType(propertyType, 0 /* Call */);
+                            for (var _e = 0, signatures_1 = signatures; _e < signatures_1.length; _e++) {
+                                var signature = signatures_1[_e];
+                                var methodDeclaration = signatureToSignatureDeclarationHelper(signature, 153 /* MethodSignature */, context);
+                                methodDeclaration.name = propertyName;
+                                methodDeclaration.questionToken = optionalToken;
+                                if (propertySymbol.valueDeclaration) {
+                                    // Copy comments to node for declaration emit
+                                    ts.setCommentRange(methodDeclaration, propertySymbol.valueDeclaration);
+                                }
+                                typeElements.push(methodDeclaration);
+                            }
+                        }
+                        else {
+                            var savedFlags = context.flags;
+                            context.flags |= !!(ts.getCheckFlags(propertySymbol) & 2048 /* ReverseMapped */) ? 33554432 /* InReverseMappedType */ : 0;
+                            var propertyTypeNode = propertyType ? typeToTypeNodeHelper(propertyType, context) : ts.createKeywordTypeNode(119 /* AnyKeyword */);
+                            context.flags = savedFlags;
+                            var modifiers = isReadonlySymbol(propertySymbol) ? [ts.createToken(132 /* ReadonlyKeyword */)] : undefined;
+                            var propertySignature = ts.createPropertySignature(modifiers, propertyName, optionalToken, propertyTypeNode, 
+                            /*initializer*/ undefined);
+                            if (propertySymbol.valueDeclaration) {
+                                // Copy comments to node for declaration emit
+                                ts.setCommentRange(propertySignature, propertySymbol.valueDeclaration);
+                            }
+                            typeElements.push(propertySignature);
+                        }
+                    }
+                    return typeElements.length ? typeElements : undefined;
+                }
+            }
+            function mapToTypeNodes(types, context) {
+                if (ts.some(types)) {
+                    var result = [];
+                    for (var _i = 0, types_1 = types; _i < types_1.length; _i++) {
+                        var type = types_1[_i];
+                        var typeNode = typeToTypeNodeHelper(type, context);
+                        if (typeNode) {
+                            result.push(typeNode);
+                        }
+                    }
+                    return result;
+                }
+            }
+            function indexInfoToIndexSignatureDeclarationHelper(indexInfo, kind, context) {
+                var name = ts.getNameFromIndexInfo(indexInfo) || "x";
+                var indexerTypeNode = ts.createKeywordTypeNode(kind === 0 /* String */ ? 137 /* StringKeyword */ : 134 /* NumberKeyword */);
+                var indexingParameter = ts.createParameter(
+                /*decorators*/ undefined, 
+                /*modifiers*/ undefined, 
+                /*dotDotDotToken*/ undefined, name, 
+                /*questionToken*/ undefined, indexerTypeNode, 
+                /*initializer*/ undefined);
+                var typeNode = typeToTypeNodeHelper(indexInfo.type || anyType, context);
+                if (!indexInfo.type && !(context.flags & 2097152 /* AllowEmptyIndexInfoType */)) {
+                    context.encounteredError = true;
+                }
+                return ts.createIndexSignature(
+                /*decorators*/ undefined, indexInfo.isReadonly ? [ts.createToken(132 /* ReadonlyKeyword */)] : undefined, [indexingParameter], typeNode);
+            }
+            function signatureToSignatureDeclarationHelper(signature, kind, context) {
+                var typeParameters;
+                var typeArguments;
+                if (context.flags & 32 /* WriteTypeArgumentsOfSignature */ && signature.target && signature.mapper && signature.target.typeParameters) {
+                    typeArguments = signature.target.typeParameters.map(function (parameter) { return typeToTypeNodeHelper(instantiateType(parameter, signature.mapper), context); });
+                }
+                else {
+                    typeParameters = signature.typeParameters && signature.typeParameters.map(function (parameter) { return typeParameterToDeclaration(parameter, context); });
+                }
+                var parameters = signature.parameters.map(function (parameter) { return symbolToParameterDeclaration(parameter, context, kind === 155 /* Constructor */); });
+                if (signature.thisParameter) {
+                    var thisParameter = symbolToParameterDeclaration(signature.thisParameter, context);
+                    parameters.unshift(thisParameter);
+                }
+                var returnTypeNode;
+                var typePredicate = getTypePredicateOfSignature(signature);
+                if (typePredicate) {
+                    var parameterName = typePredicate.kind === 1 /* Identifier */ ?
+                        ts.setEmitFlags(ts.createIdentifier(typePredicate.parameterName), 16777216 /* NoAsciiEscaping */) :
+                        ts.createThisTypeNode();
+                    var typeNode = typeToTypeNodeHelper(typePredicate.type, context);
+                    returnTypeNode = ts.createTypePredicateNode(parameterName, typeNode);
+                }
+                else {
+                    var returnType = getReturnTypeOfSignature(signature);
+                    returnTypeNode = returnType && typeToTypeNodeHelper(returnType, context);
+                }
+                if (context.flags & 256 /* SuppressAnyReturnType */) {
+                    if (returnTypeNode && returnTypeNode.kind === 119 /* AnyKeyword */) {
+                        returnTypeNode = undefined;
+                    }
+                }
+                else if (!returnTypeNode) {
+                    returnTypeNode = ts.createKeywordTypeNode(119 /* AnyKeyword */);
+                }
+                return ts.createSignatureDeclaration(kind, typeParameters, parameters, returnTypeNode, typeArguments);
+            }
+            function typeParameterShadowsNameInScope(type, context) {
+                return !!resolveName(context.enclosingDeclaration, type.symbol.escapedName, 67901928 /* Type */, /*nameNotFoundArg*/ undefined, type.symbol.escapedName, /*isUse*/ false);
+            }
+            function typeParameterToDeclarationWithConstraint(type, context, constraintNode) {
+                var savedContextFlags = context.flags;
+                context.flags &= ~512 /* WriteTypeParametersInQualifiedName */; // Avoids potential infinite loop when building for a claimspace with a generic
+                var shouldUseGeneratedName = context.flags & 4 /* GenerateNamesForShadowedTypeParams */ &&
+                    type.symbol.declarations[0] &&
+                    ts.isTypeParameterDeclaration(type.symbol.declarations[0]) &&
+                    typeParameterShadowsNameInScope(type, context);
+                var name = shouldUseGeneratedName
+                    ? ts.getGeneratedNameForNode(type.symbol.declarations[0].name, 16 /* Optimistic */ | 8 /* ReservedInNestedScopes */)
+                    : symbolToName(type.symbol, context, 67901928 /* Type */, /*expectsIdentifier*/ true);
+                var defaultParameter = getDefaultFromTypeParameter(type);
+                var defaultParameterNode = defaultParameter && typeToTypeNodeHelper(defaultParameter, context);
+                context.flags = savedContextFlags;
+                return ts.createTypeParameterDeclaration(name, constraintNode, defaultParameterNode);
+            }
+            function typeParameterToDeclaration(type, context, constraint) {
+                if (constraint === void 0) { constraint = getConstraintFromTypeParameter(type); }
+                var constraintNode = constraint && typeToTypeNodeHelper(constraint, context);
+                return typeParameterToDeclarationWithConstraint(type, context, constraintNode);
+            }
+            function symbolToParameterDeclaration(parameterSymbol, context, preserveModifierFlags) {
+                var parameterDeclaration = ts.getDeclarationOfKind(parameterSymbol, 149 /* Parameter */);
+                if (!parameterDeclaration && !isTransientSymbol(parameterSymbol)) {
+                    parameterDeclaration = ts.getDeclarationOfKind(parameterSymbol, 293 /* JSDocParameterTag */);
+                }
+                var parameterType = getTypeOfSymbol(parameterSymbol);
+                if (parameterDeclaration && isRequiredInitializedParameter(parameterDeclaration)) {
+                    parameterType = getOptionalType(parameterType);
+                }
+                var parameterTypeNode = typeToTypeNodeHelper(parameterType, context);
+                var modifiers = !(context.flags & 8192 /* OmitParameterModifiers */) && preserveModifierFlags && parameterDeclaration && parameterDeclaration.modifiers ? parameterDeclaration.modifiers.map(ts.getSynthesizedClone) : undefined;
+                var isRest = parameterDeclaration ? ts.isRestParameter(parameterDeclaration) : parameterSymbol.isRestParameter;
+                var dotDotDotToken = isRest ? ts.createToken(24 /* DotDotDotToken */) : undefined;
+                var name = parameterDeclaration
+                    ? parameterDeclaration.name ?
+                        parameterDeclaration.name.kind === 71 /* Identifier */ ? ts.setEmitFlags(ts.getSynthesizedClone(parameterDeclaration.name), 16777216 /* NoAsciiEscaping */) :
+                            parameterDeclaration.name.kind === 146 /* QualifiedName */ ? ts.setEmitFlags(ts.getSynthesizedClone(parameterDeclaration.name.right), 16777216 /* NoAsciiEscaping */) :
+                                cloneBindingName(parameterDeclaration.name) :
+                        ts.symbolName(parameterSymbol)
+                    : ts.symbolName(parameterSymbol);
+                var questionToken = parameterDeclaration && isOptionalParameter(parameterDeclaration) ? ts.createToken(55 /* QuestionToken */) : undefined;
+                var parameterNode = ts.createParameter(
+                /*decorators*/ undefined, modifiers, dotDotDotToken, name, questionToken, parameterTypeNode, 
+                /*initializer*/ undefined);
+                return parameterNode;
+                function cloneBindingName(node) {
+                    return elideInitializerAndSetEmitFlags(node);
+                    function elideInitializerAndSetEmitFlags(node) {
+                        var visited = ts.visitEachChild(node, elideInitializerAndSetEmitFlags, ts.nullTransformationContext, /*nodesVisitor*/ undefined, elideInitializerAndSetEmitFlags);
+                        var clone = ts.nodeIsSynthesized(visited) ? visited : ts.getSynthesizedClone(visited);
+                        if (clone.kind === 182 /* BindingElement */) {
+                            clone.initializer = undefined;
+                        }
+                        return ts.setEmitFlags(clone, 1 /* SingleLine */ | 16777216 /* NoAsciiEscaping */);
+                    }
+                }
+            }
+            function lookupSymbolChain(symbol, context, meaning, yieldModuleSymbol) {
+                context.tracker.trackSymbol(symbol, context.enclosingDeclaration, meaning); // TODO: GH#18217
+                // Try to get qualified name if the symbol is not a type parameter and there is an enclosing declaration.
+                var chain;
+                var isTypeParameter = symbol.flags & 262144 /* TypeParameter */;
+                if (!isTypeParameter && (context.enclosingDeclaration || context.flags & 64 /* UseFullyQualifiedType */)) {
+                    chain = ts.Debug.assertDefined(getSymbolChain(symbol, meaning, /*endOfChain*/ true));
+                    ts.Debug.assert(chain && chain.length > 0);
+                }
+                else {
+                    chain = [symbol];
+                }
+                return chain;
+                /** @param endOfChain Set to false for recursive calls; non-recursive calls should always output something. */
+                function getSymbolChain(symbol, meaning, endOfChain) {
+                    var accessibleSymbolChain = getAccessibleSymbolChain(symbol, context.enclosingDeclaration, meaning, !!(context.flags & 128 /* UseOnlyExternalAliasing */));
+                    var parentSymbol;
+                    if (!accessibleSymbolChain ||
+                        needsQualification(accessibleSymbolChain[0], context.enclosingDeclaration, accessibleSymbolChain.length === 1 ? meaning : getQualifiedLeftMeaning(meaning))) {
+                        // Go up and add our parent.
+                        var parent = getContainerOfSymbol(accessibleSymbolChain ? accessibleSymbolChain[0] : symbol);
+                        if (parent) {
+                            var parentChain = getSymbolChain(parent, getQualifiedLeftMeaning(meaning), /*endOfChain*/ false);
+                            if (parentChain) {
+                                parentSymbol = parent;
+                                accessibleSymbolChain = parentChain.concat(accessibleSymbolChain || [getAliasForSymbolInContainer(parent, symbol) || symbol]);
+                            }
+                        }
+                    }
+                    if (accessibleSymbolChain) {
+                        return accessibleSymbolChain;
+                    }
+                    if (
+                    // If this is the last part of outputting the symbol, always output. The cases apply only to parent symbols.
+                    endOfChain ||
+                        // If a parent symbol is an external module, don't write it. (We prefer just `x` vs `"foo/bar".x`.)
+                        (yieldModuleSymbol || !(!parentSymbol && ts.forEach(symbol.declarations, hasNonGlobalAugmentationExternalModuleSymbol))) &&
+                            // If a parent symbol is an anonymous type, don't write it.
+                            !(symbol.flags & (2048 /* TypeLiteral */ | 4096 /* ObjectLiteral */))) {
+                        return [symbol];
+                    }
+                }
+            }
+            function typeParametersToTypeParameterDeclarations(symbol, context) {
+                var typeParameterNodes;
+                var targetSymbol = getTargetSymbol(symbol);
+                if (targetSymbol.flags & (32 /* Class */ | 64 /* Interface */ | 524288 /* TypeAlias */)) {
+                    typeParameterNodes = ts.createNodeArray(ts.map(getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol), function (tp) { return typeParameterToDeclaration(tp, context); }));
+                }
+                return typeParameterNodes;
+            }
+            function lookupTypeParameterNodes(chain, index, context) {
+                ts.Debug.assert(chain && 0 <= index && index < chain.length);
+                var symbol = chain[index];
+                var typeParameterNodes;
+                if (context.flags & 512 /* WriteTypeParametersInQualifiedName */ && index < (chain.length - 1)) {
+                    var parentSymbol = symbol;
+                    var nextSymbol = chain[index + 1];
+                    if (ts.getCheckFlags(nextSymbol) & 1 /* Instantiated */) {
+                        var params = getTypeParametersOfClassOrInterface(parentSymbol.flags & 2097152 /* Alias */ ? resolveAlias(parentSymbol) : parentSymbol);
+                        typeParameterNodes = mapToTypeNodes(ts.map(params, nextSymbol.mapper), context);
+                    }
+                    else {
+                        typeParameterNodes = typeParametersToTypeParameterDeclarations(symbol, context);
+                    }
+                }
+                return typeParameterNodes;
+            }
+            /**
+             * Given A[B][C][D], finds A[B]
+             */
+            function getTopmostIndexedAccessType(top) {
+                if (ts.isIndexedAccessTypeNode(top.objectType)) {
+                    return getTopmostIndexedAccessType(top.objectType);
+                }
+                return top;
+            }
+            function symbolToTypeNode(symbol, context, meaning, overrideTypeArguments) {
+                var chain = lookupSymbolChain(symbol, context, meaning, !(context.flags & 16384 /* UseAliasDefinedOutsideCurrentScope */)); // If we're using aliases outside the current scope, dont bother with the module
+                context.flags |= 16777216 /* InInitialEntityName */;
+                var rootName = getNameOfSymbolAsWritten(chain[0], context);
+                context.flags ^= 16777216 /* InInitialEntityName */;
+                var isTypeOf = meaning === 67216319 /* Value */;
+                if (ambientModuleSymbolRegex.test(rootName)) {
+                    // module is root, must use `ImportTypeNode`
+                    var nonRootParts = chain.length > 1 ? createAccessFromSymbolChain(chain, chain.length - 1, 1) : undefined;
+                    var typeParameterNodes = overrideTypeArguments || lookupTypeParameterNodes(chain, 0, context);
+                    var lit = ts.createLiteralTypeNode(ts.createLiteral(rootName.substring(1, rootName.length - 1)));
+                    if (!nonRootParts || ts.isEntityName(nonRootParts)) {
+                        if (nonRootParts) {
+                            var lastId = ts.isIdentifier(nonRootParts) ? nonRootParts : nonRootParts.right;
+                            lastId.typeArguments = undefined;
+                        }
+                        return ts.createImportTypeNode(lit, nonRootParts, typeParameterNodes, isTypeOf);
+                    }
+                    else {
+                        var splitNode = getTopmostIndexedAccessType(nonRootParts);
+                        var qualifier = splitNode.objectType.typeName;
+                        return ts.createIndexedAccessTypeNode(ts.createImportTypeNode(lit, qualifier, typeParameterNodes, isTypeOf), splitNode.indexType);
+                    }
+                }
+                var entityName = createAccessFromSymbolChain(chain, chain.length - 1, 0);
+                if (ts.isIndexedAccessTypeNode(entityName)) {
+                    return entityName; // Indexed accesses can never be `typeof`
+                }
+                if (isTypeOf) {
+                    return ts.createTypeQueryNode(entityName);
+                }
+                else {
+                    var lastId = ts.isIdentifier(entityName) ? entityName : entityName.right;
+                    var lastTypeArgs = lastId.typeArguments;
+                    lastId.typeArguments = undefined;
+                    return ts.createTypeReferenceNode(entityName, lastTypeArgs);
+                }
+                function createAccessFromSymbolChain(chain, index, stopper) {
+                    var typeParameterNodes = index === (chain.length - 1) ? overrideTypeArguments : lookupTypeParameterNodes(chain, index, context);
+                    var symbol = chain[index];
+                    if (index === 0) {
+                        context.flags |= 16777216 /* InInitialEntityName */;
+                    }
+                    var symbolName = getNameOfSymbolAsWritten(symbol, context);
+                    if (index === 0) {
+                        context.flags ^= 16777216 /* InInitialEntityName */;
+                    }
+                    var parent = chain[index - 1];
+                    if (!(context.flags & 16 /* ForbidIndexedAccessSymbolReferences */) && parent && getMembersOfSymbol(parent) && getMembersOfSymbol(parent).get(symbol.escapedName) === symbol) {
+                        // Should use an indexed access
+                        var LHS = createAccessFromSymbolChain(chain, index - 1, stopper);
+                        if (ts.isIndexedAccessTypeNode(LHS)) {
+                            return ts.createIndexedAccessTypeNode(LHS, ts.createLiteralTypeNode(ts.createLiteral(symbolName)));
+                        }
+                        else {
+                            return ts.createIndexedAccessTypeNode(ts.createTypeReferenceNode(LHS, typeParameterNodes), ts.createLiteralTypeNode(ts.createLiteral(symbolName)));
+                        }
+                    }
+                    var identifier = ts.setEmitFlags(ts.createIdentifier(symbolName, typeParameterNodes), 16777216 /* NoAsciiEscaping */);
+                    identifier.symbol = symbol;
+                    if (index > stopper) {
+                        var LHS = createAccessFromSymbolChain(chain, index - 1, stopper);
+                        if (!ts.isEntityName(LHS)) {
+                            return ts.Debug.fail("Impossible construct - an export of an indexed access cannot be reachable");
+                        }
+                        return ts.createQualifiedName(LHS, identifier);
+                    }
+                    return identifier;
+                }
+            }
+            function symbolToName(symbol, context, meaning, expectsIdentifier) {
+                var chain = lookupSymbolChain(symbol, context, meaning);
+                if (expectsIdentifier && chain.length !== 1
+                    && !context.encounteredError
+                    && !(context.flags & 65536 /* AllowQualifedNameInPlaceOfIdentifier */)) {
+                    context.encounteredError = true;
+                }
+                return createEntityNameFromSymbolChain(chain, chain.length - 1);
+                function createEntityNameFromSymbolChain(chain, index) {
+                    var typeParameterNodes = lookupTypeParameterNodes(chain, index, context);
+                    var symbol = chain[index];
+                    if (index === 0) {
+                        context.flags |= 16777216 /* InInitialEntityName */;
+                    }
+                    var symbolName = getNameOfSymbolAsWritten(symbol, context);
+                    if (index === 0) {
+                        context.flags ^= 16777216 /* InInitialEntityName */;
+                    }
+                    var identifier = ts.setEmitFlags(ts.createIdentifier(symbolName, typeParameterNodes), 16777216 /* NoAsciiEscaping */);
+                    identifier.symbol = symbol;
+                    return index > 0 ? ts.createQualifiedName(createEntityNameFromSymbolChain(chain, index - 1), identifier) : identifier;
+                }
+            }
+            function symbolToExpression(symbol, context, meaning) {
+                var chain = lookupSymbolChain(symbol, context, meaning);
+                return createExpressionFromSymbolChain(chain, chain.length - 1);
+                function createExpressionFromSymbolChain(chain, index) {
+                    var typeParameterNodes = lookupTypeParameterNodes(chain, index, context);
+                    var symbol = chain[index];
+                    if (index === 0) {
+                        context.flags |= 16777216 /* InInitialEntityName */;
+                    }
+                    var symbolName = getNameOfSymbolAsWritten(symbol, context);
+                    if (index === 0) {
+                        context.flags ^= 16777216 /* InInitialEntityName */;
+                    }
+                    var firstChar = symbolName.charCodeAt(0);
+                    var canUsePropertyAccess = ts.isIdentifierStart(firstChar, languageVersion);
+                    if (index === 0 || canUsePropertyAccess) {
+                        var identifier = ts.setEmitFlags(ts.createIdentifier(symbolName, typeParameterNodes), 16777216 /* NoAsciiEscaping */);
+                        identifier.symbol = symbol;
+                        return index > 0 ? ts.createPropertyAccess(createExpressionFromSymbolChain(chain, index - 1), identifier) : identifier;
+                    }
+                    else {
+                        if (firstChar === 91 /* openBracket */) {
+                            symbolName = symbolName.substring(1, symbolName.length - 1);
+                            firstChar = symbolName.charCodeAt(0);
+                        }
+                        var expression = void 0;
+                        if (ts.isSingleOrDoubleQuote(firstChar)) {
+                            expression = ts.createLiteral(symbolName.substring(1, symbolName.length - 1).replace(/\\./g, function (s) { return s.substring(1); }));
+                            expression.singleQuote = firstChar === 39 /* singleQuote */;
+                        }
+                        else if (("" + +symbolName) === symbolName) {
+                            expression = ts.createLiteral(+symbolName);
+                        }
+                        if (!expression) {
+                            expression = ts.setEmitFlags(ts.createIdentifier(symbolName, typeParameterNodes), 16777216 /* NoAsciiEscaping */);
+                            expression.symbol = symbol;
+                        }
+                        return ts.createElementAccess(createExpressionFromSymbolChain(chain, index - 1), expression);
+                    }
+                }
+            }
+        }
+        function typePredicateToString(typePredicate, enclosingDeclaration, flags, writer) {
+            if (flags === void 0) { flags = 16384 /* UseAliasDefinedOutsideCurrentScope */; }
+            return writer ? typePredicateToStringWorker(writer).getText() : ts.usingSingleLineStringWriter(typePredicateToStringWorker);
+            function typePredicateToStringWorker(writer) {
+                var predicate = ts.createTypePredicateNode(typePredicate.kind === 1 /* Identifier */ ? ts.createIdentifier(typePredicate.parameterName) : ts.createThisTypeNode(), nodeBuilder.typeToTypeNode(typePredicate.type, enclosingDeclaration, toNodeBuilderFlags(flags) | 3112960 /* IgnoreErrors */ | 512 /* WriteTypeParametersInQualifiedName */));
+                var printer = ts.createPrinter({ removeComments: true });
+                var sourceFile = enclosingDeclaration && ts.getSourceFileOfNode(enclosingDeclaration);
+                printer.writeNode(4 /* Unspecified */, predicate, /*sourceFile*/ sourceFile, writer);
+                return writer;
+            }
+        }
+        function formatUnionTypes(types) {
+            var result = [];
+            var flags = 0;
+            for (var i = 0; i < types.length; i++) {
+                var t = types[i];
+                flags |= t.flags;
+                if (!(t.flags & 24576 /* Nullable */)) {
+                    if (t.flags & (256 /* BooleanLiteral */ | 512 /* EnumLiteral */)) {
+                        var baseType = t.flags & 256 /* BooleanLiteral */ ? booleanType : getBaseTypeOfEnumLiteralType(t);
+                        if (baseType.flags & 262144 /* Union */) {
+                            var count = baseType.types.length;
+                            if (i + count <= types.length && types[i + count - 1] === baseType.types[count - 1]) {
+                                result.push(baseType);
+                                i += count - 1;
+                                continue;
+                            }
+                        }
+                    }
+                    result.push(t);
+                }
+            }
+            if (flags & 16384 /* Null */)
+                result.push(nullType);
+            if (flags & 8192 /* Undefined */)
+                result.push(undefinedType);
+            return result || types;
+        }
+        function visibilityToString(flags) {
+            if (flags === 8 /* Private */) {
+                return "private";
+            }
+            if (flags === 16 /* Protected */) {
+                return "protected";
+            }
+            return "public";
+        }
+        function getTypeAliasForTypeLiteral(type) {
+            if (type.symbol && type.symbol.flags & 2048 /* TypeLiteral */) {
+                var node = ts.findAncestor(type.symbol.declarations[0].parent, function (n) { return n.kind !== 173 /* ParenthesizedType */; });
+                if (node.kind === 237 /* TypeAliasDeclaration */) {
+                    return getSymbolOfNode(node);
+                }
+            }
+            return undefined;
+        }
+        function isTopLevelInExternalModuleAugmentation(node) {
+            return node && node.parent &&
+                node.parent.kind === 240 /* ModuleBlock */ &&
+                ts.isExternalModuleAugmentation(node.parent.parent);
+        }
+        function isDefaultBindingContext(location) {
+            return location.kind === 274 /* SourceFile */ || ts.isAmbientModule(location);
+        }
+        /**
+         * Gets a human-readable name for a symbol.
+         * Should *not* be used for the right-hand side of a `.` -- use `symbolName(symbol)` for that instead.
+         *
+         * Unlike `symbolName(symbol)`, this will include quotes if the name is from a string literal.
+         * It will also use a representation of a number as written instead of a decimal form, e.g. `0o11` instead of `9`.
+         */
+        function getNameOfSymbolAsWritten(symbol, context) {
+            if (context && symbol.escapedName === "default" /* Default */ && !(context.flags & 16384 /* UseAliasDefinedOutsideCurrentScope */) &&
+                // If it's not the first part of an entity name, it must print as `default`
+                (!(context.flags & 16777216 /* InInitialEntityName */) ||
+                    // if the symbol is synthesized, it will only be referenced externally it must print as `default`
+                    !symbol.declarations ||
+                    // if not in the same binding context (source file, module declaration), it must print as `default`
+                    (context.enclosingDeclaration && ts.findAncestor(symbol.declarations[0], isDefaultBindingContext) !== ts.findAncestor(context.enclosingDeclaration, isDefaultBindingContext)))) {
+                return "default";
+            }
+            if (symbol.declarations && symbol.declarations.length) {
+                if (ts.some(symbol.declarations, hasExternalModuleSymbol) && context.enclosingDeclaration) { // TODO: GH#18217
+                    var file = ts.getDeclarationOfKind(symbol, 274 /* SourceFile */);
+                    if (!file || !context.tracker.moduleResolverHost) {
+                        if (context.tracker.trackReferencedAmbientModule) {
+                            var ambientDecls = ts.filter(symbol.declarations, ts.isAmbientModule);
+                            if (ts.length(ambientDecls)) {
+                                for (var _i = 0, ambientDecls_1 = ambientDecls; _i < ambientDecls_1.length; _i++) {
+                                    var decl = ambientDecls_1[_i];
+                                    context.tracker.trackReferencedAmbientModule(decl); // TODO: GH#18217
+                                }
+                            }
+                        }
+                        // ambient module, just use declaration/symbol name (fallthrough)
+                    }
+                    else {
+                        var contextFile = ts.getSourceFileOfNode(ts.getOriginalNode(context.enclosingDeclaration));
+                        return "\"" + (file.moduleName || ts.moduleSpecifiers.getModuleSpecifier(compilerOptions, contextFile, contextFile.path, file.path, context.tracker.moduleResolverHost)) + "\"";
+                    }
+                }
+                var declaration = symbol.declarations[0];
+                var name = ts.getNameOfDeclaration(declaration);
+                if (name) {
+                    return ts.declarationNameToString(name);
+                }
+                if (declaration.parent && declaration.parent.kind === 232 /* VariableDeclaration */) {
+                    return ts.declarationNameToString(declaration.parent.name);
+                }
+                if (context && !context.encounteredError && !(context.flags & 131072 /* AllowAnonymousIdentifier */)) {
+                    context.encounteredError = true;
+                }
+                switch (declaration.kind) {
+                    case 205 /* ClassExpression */:
+                        return "(Anonymous class)";
+                    case 192 /* FunctionExpression */:
+                    case 193 /* ArrowFunction */:
+                        return "(Anonymous function)";
+                }
+            }
+            var nameType = symbol.nameType;
+            if (nameType) {
+                if (nameType.flags & 64 /* StringLiteral */ && !ts.isIdentifierText(nameType.value, compilerOptions.target)) {
+                    return "\"" + ts.escapeString(nameType.value, 34 /* doubleQuote */) + "\"";
+                }
+                if (nameType && nameType.flags & 2048 /* UniqueESSymbol */) {
+                    return "[" + getNameOfSymbolAsWritten(nameType.symbol, context) + "]";
+                }
+            }
+            return ts.symbolName(symbol);
+        }
+        function isDeclarationVisible(node) {
+            if (node) {
+                var links = getNodeLinks(node);
+                if (links.isVisible === undefined) {
+                    links.isVisible = !!determineIfDeclarationIsVisible();
+                }
+                return links.isVisible;
+            }
+            return false;
+            function determineIfDeclarationIsVisible() {
+                switch (node.kind) {
+                    case 292 /* JSDocCallbackTag */:
+                    case 297 /* JSDocTypedefTag */:
+                        // Top-level jsdoc type aliases are considered exported
+                        // First parent is comment node, second is hosting declaration or token; we only care about those tokens or declarations whose parent is a source file
+                        return !!(node.parent && node.parent.parent && node.parent.parent.parent && ts.isSourceFile(node.parent.parent.parent));
+                    case 182 /* BindingElement */:
+                        return isDeclarationVisible(node.parent.parent);
+                    case 232 /* VariableDeclaration */:
+                        if (ts.isBindingPattern(node.name) &&
+                            !node.name.elements.length) {
+                            // If the binding pattern is empty, this variable declaration is not visible
+                            return false;
+                        }
+                    // falls through
+                    case 239 /* ModuleDeclaration */:
+                    case 235 /* ClassDeclaration */:
+                    case 236 /* InterfaceDeclaration */:
+                    case 237 /* TypeAliasDeclaration */:
+                    case 234 /* FunctionDeclaration */:
+                    case 238 /* EnumDeclaration */:
+                    case 243 /* ImportEqualsDeclaration */:
+                        // external module augmentation is always visible
+                        if (ts.isExternalModuleAugmentation(node)) {
+                            return true;
+                        }
+                        var parent = getDeclarationContainer(node);
+                        // If the node is not exported or it is not ambient module element (except import declaration)
+                        if (!(ts.getCombinedModifierFlags(node) & 1 /* Export */) &&
+                            !(node.kind !== 243 /* ImportEqualsDeclaration */ && parent.kind !== 274 /* SourceFile */ && parent.flags & 4194304 /* Ambient */)) {
+                            return isGlobalSourceFile(parent);
+                        }
+                        // Exported members/ambient module elements (exception import declaration) are visible if parent is visible
+                        return isDeclarationVisible(parent);
+                    case 152 /* PropertyDeclaration */:
+                    case 151 /* PropertySignature */:
+                    case 156 /* GetAccessor */:
+                    case 157 /* SetAccessor */:
+                    case 154 /* MethodDeclaration */:
+                    case 153 /* MethodSignature */:
+                        if (ts.hasModifier(node, 8 /* Private */ | 16 /* Protected */)) {
+                            // Private/protected properties/methods are not visible
+                            return false;
+                        }
+                    // Public properties/methods are visible if its parents are visible, so:
+                    // falls through
+                    case 155 /* Constructor */:
+                    case 159 /* ConstructSignature */:
+                    case 158 /* CallSignature */:
+                    case 160 /* IndexSignature */:
+                    case 149 /* Parameter */:
+                    case 240 /* ModuleBlock */:
+                    case 163 /* FunctionType */:
+                    case 164 /* ConstructorType */:
+                    case 166 /* TypeLiteral */:
+                    case 162 /* TypeReference */:
+                    case 167 /* ArrayType */:
+                    case 168 /* TupleType */:
+                    case 169 /* UnionType */:
+                    case 170 /* IntersectionType */:
+                    case 173 /* ParenthesizedType */:
+                        return isDeclarationVisible(node.parent);
+                    // Default binding, import specifier and namespace import is visible
+                    // only on demand so by default it is not visible
+                    case 245 /* ImportClause */:
+                    case 246 /* NamespaceImport */:
+                    case 248 /* ImportSpecifier */:
+                        return false;
+                    // Type parameters are always visible
+                    case 148 /* TypeParameter */:
+                    // Source file and namespace export are always visible
+                    case 274 /* SourceFile */:
+                    case 242 /* NamespaceExportDeclaration */:
+                        return true;
+                    // Export assignments do not create name bindings outside the module
+                    case 249 /* ExportAssignment */:
+                        return false;
+                    default:
+                        return false;
+                }
+            }
+        }
+        function collectLinkedAliases(node, setVisibility) {
+            var exportSymbol;
+            if (node.parent && node.parent.kind === 249 /* ExportAssignment */) {
+                exportSymbol = resolveName(node, node.escapedText, 67216319 /* Value */ | 67901928 /* Type */ | 1920 /* Namespace */ | 2097152 /* Alias */, /*nameNotFoundMessage*/ undefined, node, /*isUse*/ false);
+            }
+            else if (node.parent.kind === 252 /* ExportSpecifier */) {
+                exportSymbol = getTargetOfExportSpecifier(node.parent, 67216319 /* Value */ | 67901928 /* Type */ | 1920 /* Namespace */ | 2097152 /* Alias */);
+            }
+            var result;
+            if (exportSymbol) {
+                buildVisibleNodeList(exportSymbol.declarations);
+            }
+            return result;
+            function buildVisibleNodeList(declarations) {
+                ts.forEach(declarations, function (declaration) {
+                    var resultNode = getAnyImportSyntax(declaration) || declaration;
+                    if (setVisibility) {
+                        getNodeLinks(declaration).isVisible = true;
+                    }
+                    else {
+                        result = result || [];
+                        ts.pushIfUnique(result, resultNode);
+                    }
+                    if (ts.isInternalModuleImportEqualsDeclaration(declaration)) {
+                        // Add the referenced top container visible
+                        var internalModuleReference = declaration.moduleReference;
+                        var firstIdentifier = getFirstIdentifier(internalModuleReference);
+                        var importSymbol = resolveName(declaration, firstIdentifier.escapedText, 67216319 /* Value */ | 67901928 /* Type */ | 1920 /* Namespace */, undefined, undefined, /*isUse*/ false);
+                        if (importSymbol) {
+                            buildVisibleNodeList(importSymbol.declarations);
+                        }
+                    }
+                });
+            }
+        }
+        /**
+         * Push an entry on the type resolution stack. If an entry with the given target and the given property name
+         * is already on the stack, and no entries in between already have a type, then a circularity has occurred.
+         * In this case, the result values of the existing entry and all entries pushed after it are changed to false,
+         * and the value false is returned. Otherwise, the new entry is just pushed onto the stack, and true is returned.
+         * In order to see if the same query has already been done before, the target object and the propertyName both
+         * must match the one passed in.
+         *
+         * @param target The symbol, type, or signature whose type is being queried
+         * @param propertyName The property name that should be used to query the target for its type
+         */
+        function pushTypeResolution(target, propertyName) {
+            var resolutionCycleStartIndex = findResolutionCycleStartIndex(target, propertyName);
+            if (resolutionCycleStartIndex >= 0) {
+                // A cycle was found
+                var length_2 = resolutionTargets.length;
+                for (var i = resolutionCycleStartIndex; i < length_2; i++) {
+                    resolutionResults[i] = false;
+                }
+                return false;
+            }
+            resolutionTargets.push(target);
+            resolutionResults.push(/*items*/ true);
+            resolutionPropertyNames.push(propertyName);
+            return true;
+        }
+        function findResolutionCycleStartIndex(target, propertyName) {
+            for (var i = resolutionTargets.length - 1; i >= 0; i--) {
+                if (hasType(resolutionTargets[i], resolutionPropertyNames[i])) {
+                    return -1;
+                }
+                if (resolutionTargets[i] === target && resolutionPropertyNames[i] === propertyName) {
+                    return i;
+                }
+            }
+            return -1;
+        }
+        function hasType(target, propertyName) {
+            if (propertyName === 0 /* Type */) {
+                return !!getSymbolLinks(target).type;
+            }
+            if (propertyName === 2 /* DeclaredType */) {
+                return !!getSymbolLinks(target).declaredType;
+            }
+            if (propertyName === 1 /* ResolvedBaseConstructorType */) {
+                return !!target.resolvedBaseConstructorType;
+            }
+            if (propertyName === 3 /* ResolvedReturnType */) {
+                return !!target.resolvedReturnType;
+            }
+            if (propertyName === 4 /* ResolvedBaseConstraint */) {
+                var bc = target.resolvedBaseConstraint;
+                return !!bc && bc !== circularConstraintType;
+            }
+            return ts.Debug.fail("Unhandled TypeSystemPropertyName " + propertyName);
+        }
+        // Pop an entry from the type resolution stack and return its associated result value. The result value will
+        // be true if no circularities were detected, or false if a circularity was found.
+        function popTypeResolution() {
+            resolutionTargets.pop();
+            resolutionPropertyNames.pop();
+            return resolutionResults.pop();
+        }
+        function getDeclarationContainer(node) {
+            return ts.findAncestor(ts.getRootDeclaration(node), function (node) {
+                switch (node.kind) {
+                    case 232 /* VariableDeclaration */:
+                    case 233 /* VariableDeclarationList */:
+                    case 248 /* ImportSpecifier */:
+                    case 247 /* NamedImports */:
+                    case 246 /* NamespaceImport */:
+                    case 245 /* ImportClause */:
+                        return false;
+                    default:
+                        return true;
+                }
+            }).parent;
+        }
+        function getTypeOfPrototypeProperty(prototype) {
+            // TypeScript 1.0 spec (April 2014): 8.4
+            // Every class automatically contains a static property member named 'prototype',
+            // the type of which is an instantiation of the class type with type Any supplied as a type argument for each type parameter.
+            // It is an error to explicitly declare a static property member with the name 'prototype'.
+            var classType = getDeclaredTypeOfSymbol(getParentOfSymbol(prototype));
+            return classType.typeParameters ? createTypeReference(classType, ts.map(classType.typeParameters, function (_) { return anyType; })) : classType;
+        }
+        // Return the type of the given property in the given type, or undefined if no such property exists
+        function getTypeOfPropertyOfType(type, name) {
+            var prop = getPropertyOfType(type, name);
+            return prop ? getTypeOfSymbol(prop) : undefined;
+        }
+        function isTypeAny(type) {
+            return type && (type.flags & 1 /* Any */) !== 0;
+        }
+        // Return the type of a binding element parent. We check SymbolLinks first to see if a type has been
+        // assigned by contextual typing.
+        function getTypeForBindingElementParent(node) {
+            var symbol = getSymbolOfNode(node);
+            return symbol && getSymbolLinks(symbol).type || getTypeForVariableLikeDeclaration(node, /*includeOptionality*/ false);
+        }
+        function isComputedNonLiteralName(name) {
+            return name.kind === 147 /* ComputedPropertyName */ && !ts.isStringOrNumericLiteral(name.expression);
+        }
+        function getRestType(source, properties, symbol) {
+            source = filterType(source, function (t) { return !(t.flags & 24576 /* Nullable */); });
+            if (source.flags & 32768 /* Never */) {
+                return emptyObjectType;
+            }
+            if (source.flags & 262144 /* Union */) {
+                return mapType(source, function (t) { return getRestType(t, properties, symbol); });
+            }
+            var members = ts.createSymbolTable();
+            var names = ts.createUnderscoreEscapedMap();
+            for (var _i = 0, properties_2 = properties; _i < properties_2.length; _i++) {
+                var name = properties_2[_i];
+                names.set(ts.getTextOfPropertyName(name), true);
+            }
+            for (var _a = 0, _b = getPropertiesOfType(source); _a < _b.length; _a++) {
+                var prop = _b[_a];
+                var inNamesToRemove = names.has(prop.escapedName);
+                var isPrivate = ts.getDeclarationModifierFlagsFromSymbol(prop) & (8 /* Private */ | 16 /* Protected */);
+                var isSetOnlyAccessor = prop.flags & 65536 /* SetAccessor */ && !(prop.flags & 32768 /* GetAccessor */);
+                if (!inNamesToRemove && !isPrivate && !isClassMethod(prop) && !isSetOnlyAccessor) {
+                    members.set(prop.escapedName, getNonReadonlySymbol(prop));
+                }
+            }
+            var stringIndexInfo = getIndexInfoOfType(source, 0 /* String */);
+            var numberIndexInfo = getIndexInfoOfType(source, 1 /* Number */);
+            return createAnonymousType(symbol, members, ts.emptyArray, ts.emptyArray, stringIndexInfo, numberIndexInfo);
+        }
+        /** Return the inferred type for a binding element */
+        function getTypeForBindingElement(declaration) {
+            var pattern = declaration.parent;
+            var parentType = getTypeForBindingElementParent(pattern.parent);
+            // If parent has the unknown (error) type, then so does this binding element
+            if (parentType === errorType) {
+                return errorType;
+            }
+            // If no type was specified or inferred for parent,
+            // infer from the initializer of the binding element if one is present.
+            // Otherwise, go with the undefined type of the parent.
+            if (!parentType) {
+                return declaration.initializer ? checkDeclarationInitializer(declaration) : parentType;
+            }
+            if (isTypeAny(parentType)) {
+                return parentType;
+            }
+            var type;
+            if (pattern.kind === 180 /* ObjectBindingPattern */) {
+                if (declaration.dotDotDotToken) {
+                    if (parentType.flags & 2 /* Unknown */ || !isValidSpreadType(parentType)) {
+                        error(declaration, ts.Diagnostics.Rest_types_may_only_be_created_from_object_types);
+                        return errorType;
+                    }
+                    var literalMembers = [];
+                    for (var _i = 0, _a = pattern.elements; _i < _a.length; _i++) {
+                        var element = _a[_i];
+                        if (!element.dotDotDotToken) {
+                            literalMembers.push(element.propertyName || element.name);
+                        }
+                    }
+                    type = getRestType(parentType, literalMembers, declaration.symbol);
+                }
+                else {
+                    // Use explicitly specified property name ({ p: xxx } form), or otherwise the implied name ({ p } form)
+                    var name = declaration.propertyName || declaration.name;
+                    var isLate = isLateBindableName(name);
+                    var isWellKnown = ts.isComputedPropertyName(name) && ts.isWellKnownSymbolSyntactically(name.expression);
+                    if (!isLate && !isWellKnown && isComputedNonLiteralName(name)) {
+                        var exprType = checkExpression(name.expression);
+                        if (isTypeAssignableToKind(exprType, 3072 /* ESSymbolLike */)) {
+                            if (noImplicitAny) {
+                                error(declaration, ts.Diagnostics.Type_0_cannot_be_used_to_index_type_1, typeToString(exprType), typeToString(parentType));
+                            }
+                            return anyType;
+                        }
+                        var indexerType = isTypeAssignableToKind(exprType, 168 /* NumberLike */) && getIndexTypeOfType(parentType, 1 /* Number */) || getIndexTypeOfType(parentType, 0 /* String */);
+                        if (!indexerType && noImplicitAny && !compilerOptions.suppressImplicitAnyIndexErrors) {
+                            if (getIndexTypeOfType(parentType, 1 /* Number */)) {
+                                error(declaration, ts.Diagnostics.Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number);
+                            }
+                            else {
+                                error(declaration, ts.Diagnostics.Element_implicitly_has_an_any_type_because_type_0_has_no_index_signature, typeToString(parentType));
+                            }
+                        }
+                        return indexerType || anyType;
+                    }
+                    // Use type of the specified property, or otherwise, for a numeric name, the type of the numeric index signature,
+                    // or otherwise the type of the string index signature.
+                    var nameType = isLate ? checkComputedPropertyName(name) : undefined;
+                    var text = isLate ? getLateBoundNameFromType(nameType) :
+                        isWellKnown ? ts.getPropertyNameForKnownSymbolName(ts.idText(name.expression.name)) :
+                            ts.getTextOfPropertyName(name);
+                    // Relax null check on ambient destructuring parameters, since the parameters have no implementation and are just documentation
+                    if (strictNullChecks && declaration.flags & 4194304 /* Ambient */ && ts.isParameterDeclaration(declaration)) {
+                        parentType = getNonNullableType(parentType);
+                    }
+                    if (isLate && nameType && !getPropertyOfType(parentType, text) && isTypeAssignableToKind(nameType, 3072 /* ESSymbolLike */)) {
+                        if (noImplicitAny) {
+                            error(declaration, ts.Diagnostics.Type_0_cannot_be_used_to_index_type_1, typeToString(nameType), typeToString(parentType));
+                        }
+                        return anyType;
+                    }
+                    var declaredType = getConstraintForLocation(getTypeOfPropertyOfType(parentType, text), declaration.name);
+                    type = declaredType && getFlowTypeOfReference(declaration, declaredType) ||
+                        isNumericLiteralName(text) && getIndexTypeOfType(parentType, 1 /* Number */) ||
+                        getIndexTypeOfType(parentType, 0 /* String */);
+                    if (!type) {
+                        error(name, ts.Diagnostics.Type_0_has_no_property_1_and_no_string_index_signature, typeToString(parentType), ts.declarationNameToString(name));
+                        return errorType;
+                    }
+                }
+            }
+            else {
+                // This elementType will be used if the specific property corresponding to this index is not
+                // present (aka the tuple element property). This call also checks that the parentType is in
+                // fact an iterable or array (depending on target language).
+                var elementType = checkIteratedTypeOrElementType(parentType, pattern, /*allowStringInput*/ false, /*allowAsyncIterables*/ false);
+                if (declaration.dotDotDotToken) {
+                    // Rest element has an array type with the same element type as the parent type
+                    type = createArrayType(elementType);
+                }
+                else {
+                    // Use specific property type when parent is a tuple or numeric index type when parent is an array
+                    var propName = "" + pattern.elements.indexOf(declaration);
+                    type = isTupleLikeType(parentType)
+                        ? getTypeOfPropertyOfType(parentType, propName)
+                        : elementType;
+                    if (!type) {
+                        if (isTupleType(parentType)) {
+                            error(declaration, ts.Diagnostics.Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2, typeToString(parentType), getTypeReferenceArity(parentType), pattern.elements.length);
+                        }
+                        else {
+                            error(declaration, ts.Diagnostics.Type_0_has_no_property_1, typeToString(parentType), propName);
+                        }
+                        return errorType;
+                    }
+                }
+            }
+            // In strict null checking mode, if a default value of a non-undefined type is specified, remove
+            // undefined from the final type.
+            if (strictNullChecks && declaration.initializer && !(getFalsyFlags(checkExpressionCached(declaration.initializer)) & 8192 /* Undefined */)) {
+                type = getTypeWithFacts(type, 131072 /* NEUndefined */);
+            }
+            return declaration.initializer ?
+                getUnionType([type, checkExpressionCached(declaration.initializer)], 2 /* Subtype */) :
+                type;
+        }
+        function getTypeForDeclarationFromJSDocComment(declaration) {
+            var jsdocType = ts.getJSDocType(declaration);
+            if (jsdocType) {
+                return getTypeFromTypeNode(jsdocType);
+            }
+            return undefined;
+        }
+        function isNullOrUndefined(node) {
+            var expr = ts.skipParentheses(node);
+            return expr.kind === 95 /* NullKeyword */ || expr.kind === 71 /* Identifier */ && getResolvedSymbol(expr) === undefinedSymbol;
+        }
+        function isEmptyArrayLiteral(node) {
+            var expr = ts.skipParentheses(node);
+            return expr.kind === 183 /* ArrayLiteralExpression */ && expr.elements.length === 0;
+        }
+        function addOptionality(type, optional) {
+            if (optional === void 0) { optional = true; }
+            return strictNullChecks && optional ? getOptionalType(type) : type;
+        }
+        // Return the inferred type for a variable, parameter, or property declaration
+        function getTypeForVariableLikeDeclaration(declaration, includeOptionality) {
+            // A variable declared in a for..in statement is of type string, or of type keyof T when the
+            // right hand expression is of a type parameter type.
+            if (ts.isVariableDeclaration(declaration) && declaration.parent.parent.kind === 221 /* ForInStatement */) {
+                var indexType = getIndexType(checkNonNullExpression(declaration.parent.parent.expression));
+                return indexType.flags & (65536 /* TypeParameter */ | 1048576 /* Index */) ? getExtractStringType(indexType) : stringType;
+            }
+            if (ts.isVariableDeclaration(declaration) && declaration.parent.parent.kind === 222 /* ForOfStatement */) {
+                // checkRightHandSideOfForOf will return undefined if the for-of expression type was
+                // missing properties/signatures required to get its iteratedType (like
+                // [Symbol.iterator] or next). This may be because we accessed properties from anyType,
+                // or it may have led to an error inside getElementTypeOfIterable.
+                var forOfStatement = declaration.parent.parent;
+                return checkRightHandSideOfForOf(forOfStatement.expression, forOfStatement.awaitModifier) || anyType;
+            }
+            if (ts.isBindingPattern(declaration.parent)) {
+                return getTypeForBindingElement(declaration);
+            }
+            var isOptional = includeOptionality && (ts.isParameter(declaration) && isJSDocOptionalParameter(declaration)
+                || !ts.isBindingElement(declaration) && !ts.isVariableDeclaration(declaration) && !!declaration.questionToken);
+            // Use type from type annotation if one is present
+            var declaredType = tryGetTypeFromEffectiveTypeNode(declaration);
+            if (declaredType) {
+                return addOptionality(declaredType, isOptional);
+            }
+            if ((noImplicitAny || ts.isInJavaScriptFile(declaration)) &&
+                declaration.kind === 232 /* VariableDeclaration */ && !ts.isBindingPattern(declaration.name) &&
+                !(ts.getCombinedModifierFlags(declaration) & 1 /* Export */) && !(declaration.flags & 4194304 /* Ambient */)) {
+                // If --noImplicitAny is on or the declaration is in a Javascript file,
+                // use control flow tracked 'any' type for non-ambient, non-exported var or let variables with no
+                // initializer or a 'null' or 'undefined' initializer.
+                if (!(ts.getCombinedNodeFlags(declaration) & 2 /* Const */) && (!declaration.initializer || isNullOrUndefined(declaration.initializer))) {
+                    return autoType;
+                }
+                // Use control flow tracked 'any[]' type for non-ambient, non-exported variables with an empty array
+                // literal initializer.
+                if (declaration.initializer && isEmptyArrayLiteral(declaration.initializer)) {
+                    return autoArrayType;
+                }
+            }
+            if (declaration.kind === 149 /* Parameter */) {
+                var func = declaration.parent;
+                // For a parameter of a set accessor, use the type of the get accessor if one is present
+                if (func.kind === 157 /* SetAccessor */ && !hasNonBindableDynamicName(func)) {
+                    var getter = ts.getDeclarationOfKind(getSymbolOfNode(declaration.parent), 156 /* GetAccessor */);
+                    if (getter) {
+                        var getterSignature = getSignatureFromDeclaration(getter);
+                        var thisParameter = getAccessorThisParameter(func);
+                        if (thisParameter && declaration === thisParameter) {
+                            // Use the type from the *getter*
+                            ts.Debug.assert(!thisParameter.type);
+                            return getTypeOfSymbol(getterSignature.thisParameter);
+                        }
+                        return getReturnTypeOfSignature(getterSignature);
+                    }
+                }
+                // Use contextual parameter type if one is available
+                var type = void 0;
+                if (declaration.symbol.escapedName === "this") {
+                    type = getContextualThisParameterType(func);
+                }
+                else {
+                    type = getContextuallyTypedParameterType(declaration);
+                }
+                if (type) {
+                    return addOptionality(type, isOptional);
+                }
+            }
+            // Use the type of the initializer expression if one is present
+            if (declaration.initializer) {
+                var type = checkDeclarationInitializer(declaration);
+                return addOptionality(type, isOptional);
+            }
+            if (ts.isJsxAttribute(declaration)) {
+                // if JSX attribute doesn't have initializer, by default the attribute will have boolean value of true.
+                // I.e <Elem attr /> is sugar for <Elem attr={true} />
+                return trueType;
+            }
+            // If the declaration specifies a binding pattern, use the type implied by the binding pattern
+            if (ts.isBindingPattern(declaration.name)) {
+                return getTypeFromBindingPattern(declaration.name, /*includePatternInType*/ false, /*reportErrors*/ true);
+            }
+            // No type specified and nothing can be inferred
+            return undefined;
+        }
+        function getWidenedTypeFromJSSpecialPropertyDeclarations(symbol) {
+            // function/class/{} assignments are fresh declarations, not property assignments, so only add prototype assignments
+            var specialDeclaration = ts.getAssignedJavascriptInitializer(symbol.valueDeclaration);
+            if (specialDeclaration) {
+                return getWidenedLiteralType(checkExpressionCached(specialDeclaration));
+            }
+            var types = [];
+            var constructorTypes;
+            var definedInConstructor = false;
+            var definedInMethod = false;
+            var jsDocType;
+            var _loop_4 = function (declaration) {
+                var declarationInConstructor = false;
+                var expression = declaration.kind === 200 /* BinaryExpression */ ? declaration :
+                    declaration.kind === 185 /* PropertyAccessExpression */ ? ts.cast(declaration.parent, ts.isBinaryExpression) :
+                        undefined;
+                if (!expression) {
+                    return { value: errorType };
+                }
+                var special = ts.getSpecialPropertyAssignmentKind(expression);
+                if (special === 4 /* ThisProperty */) {
+                    var thisContainer = ts.getThisContainer(expression, /*includeArrowFunctions*/ false);
+                    // Properties defined in a constructor (or base constructor, or javascript constructor function) don't get undefined added.
+                    // Function expressions that are assigned to the prototype count as methods.
+                    declarationInConstructor = thisContainer.kind === 155 /* Constructor */ ||
+                        thisContainer.kind === 234 /* FunctionDeclaration */ ||
+                        (thisContainer.kind === 192 /* FunctionExpression */ && !ts.isPrototypePropertyAssignment(thisContainer.parent));
+                    if (declarationInConstructor) {
+                        definedInConstructor = true;
+                    }
+                    else {
+                        definedInMethod = true;
+                    }
+                }
+                // If there is a JSDoc type, use it
+                var type_1 = getTypeForDeclarationFromJSDocComment(expression.parent);
+                if (type_1) {
+                    var declarationType = getWidenedType(type_1);
+                    if (!jsDocType) {
+                        jsDocType = declarationType;
+                    }
+                    else if (jsDocType !== errorType && declarationType !== errorType &&
+                        !isTypeIdenticalTo(jsDocType, declarationType) &&
+                        !(symbol.flags & 67108864 /* JSContainer */)) {
+                        errorNextVariableOrPropertyDeclarationMustHaveSameType(jsDocType, declaration, declarationType);
+                    }
+                }
+                else if (!jsDocType) {
+                    // If we don't have an explicit JSDoc type, get the type from the expression.
+                    var type_2 = getWidenedLiteralType(checkExpressionCached(expression.right));
+                    if (ts.getObjectFlags(type_2) & 16 /* Anonymous */ &&
+                        special === 2 /* ModuleExports */ &&
+                        symbol.escapedName === "export=" /* ExportEquals */) {
+                        var exportedType_1 = resolveStructuredTypeMembers(type_2);
+                        var members_3 = ts.createSymbolTable();
+                        ts.copyEntries(exportedType_1.members, members_3);
+                        symbol.exports.forEach(function (s, name) {
+                            if (members_3.has(name)) {
+                                var exportedMember = exportedType_1.members.get(name);
+                                var union = createSymbol(s.flags | exportedMember.flags, name);
+                                union.type = getUnionType([getTypeOfSymbol(s), getTypeOfSymbol(exportedMember)]);
+                                members_3.set(name, union);
+                            }
+                            else {
+                                members_3.set(name, s);
+                            }
+                        });
+                        type_2 = createAnonymousType(exportedType_1.symbol, members_3, exportedType_1.callSignatures, exportedType_1.constructSignatures, exportedType_1.stringIndexInfo, exportedType_1.numberIndexInfo);
+                    }
+                    var anyedType = type_2;
+                    if (isEmptyArrayLiteralType(type_2)) {
+                        anyedType = anyArrayType;
+                        if (noImplicitAny) {
+                            reportImplicitAnyError(expression, anyArrayType);
+                        }
+                    }
+                    types.push(anyedType);
+                    if (declarationInConstructor) {
+                        (constructorTypes || (constructorTypes = [])).push(anyedType);
+                    }
+                }
+            };
+            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                var declaration = _a[_i];
+                var state_2 = _loop_4(declaration);
+                if (typeof state_2 === "object")
+                    return state_2.value;
+            }
+            var type = jsDocType;
+            if (!type) {
+                // use only the constructor types unless they were only assigned null | undefined (including widening variants)
+                if (definedInMethod) {
+                    var propType = getTypeOfSpecialPropertyOfBaseType(symbol);
+                    if (propType) {
+                        (constructorTypes || (constructorTypes = [])).push(propType);
+                        definedInConstructor = true;
+                    }
+                }
+                var sourceTypes = ts.some(constructorTypes, function (t) { return !!(t.flags & ~(24576 /* Nullable */ | 134217728 /* ContainsWideningType */)); }) ? constructorTypes : types; // TODO: GH#18217
+                type = getUnionType(sourceTypes, 2 /* Subtype */);
+            }
+            var widened = getWidenedType(addOptionality(type, definedInMethod && !definedInConstructor));
+            if (filterType(widened, function (t) { return !!(t.flags & ~24576 /* Nullable */); }) === neverType) {
+                if (noImplicitAny) {
+                    reportImplicitAnyError(symbol.valueDeclaration, anyType);
+                }
+                return anyType;
+            }
+            return widened;
+        }
+        /** check for definition in base class if any declaration is in a class */
+        function getTypeOfSpecialPropertyOfBaseType(specialProperty) {
+            var parentDeclaration = ts.forEach(specialProperty.declarations, function (d) {
+                var parent = ts.getThisContainer(d, /*includeArrowFunctions*/ false).parent;
+                return ts.isClassLike(parent) && parent;
+            });
+            if (parentDeclaration) {
+                var classType = getDeclaredTypeOfSymbol(getSymbolOfNode(parentDeclaration));
+                var baseClassType = classType && getBaseTypes(classType)[0];
+                if (baseClassType) {
+                    return getTypeOfPropertyOfType(baseClassType, specialProperty.escapedName);
+                }
+            }
+        }
+        // Return the type implied by a binding pattern element. This is the type of the initializer of the element if
+        // one is present. Otherwise, if the element is itself a binding pattern, it is the type implied by the binding
+        // pattern. Otherwise, it is the type any.
+        function getTypeFromBindingElement(element, includePatternInType, reportErrors) {
+            if (element.initializer) {
+                return checkDeclarationInitializer(element);
+            }
+            if (ts.isBindingPattern(element.name)) {
+                return getTypeFromBindingPattern(element.name, includePatternInType, reportErrors);
+            }
+            if (reportErrors && noImplicitAny && !declarationBelongsToPrivateAmbientMember(element)) {
+                reportImplicitAnyError(element, anyType);
+            }
+            return anyType;
+        }
+        // Return the type implied by an object binding pattern
+        function getTypeFromObjectBindingPattern(pattern, includePatternInType, reportErrors) {
+            var members = ts.createSymbolTable();
+            var stringIndexInfo;
+            var objectFlags = 128 /* ObjectLiteral */;
+            ts.forEach(pattern.elements, function (e) {
+                var name = e.propertyName || e.name;
+                if (isComputedNonLiteralName(name)) {
+                    // do not include computed properties in the implied type
+                    objectFlags |= 512 /* ObjectLiteralPatternWithComputedProperties */;
+                    return;
+                }
+                if (e.dotDotDotToken) {
+                    stringIndexInfo = createIndexInfo(anyType, /*isReadonly*/ false);
+                    return;
+                }
+                var text = ts.getTextOfPropertyName(name);
+                var flags = 4 /* Property */ | (e.initializer ? 16777216 /* Optional */ : 0);
+                var symbol = createSymbol(flags, text);
+                symbol.type = getTypeFromBindingElement(e, includePatternInType, reportErrors);
+                symbol.bindingElement = e;
+                members.set(symbol.escapedName, symbol);
+            });
+            var result = createAnonymousType(undefined, members, ts.emptyArray, ts.emptyArray, stringIndexInfo, undefined);
+            result.flags |= 268435456 /* ContainsObjectLiteral */;
+            result.objectFlags |= objectFlags;
+            if (includePatternInType) {
+                result.pattern = pattern;
+            }
+            return result;
+        }
+        // Return the type implied by an array binding pattern
+        function getTypeFromArrayBindingPattern(pattern, includePatternInType, reportErrors) {
+            var elements = pattern.elements;
+            var lastElement = ts.lastOrUndefined(elements);
+            if (!lastElement || (!ts.isOmittedExpression(lastElement) && lastElement.dotDotDotToken)) {
+                return languageVersion >= 2 /* ES2015 */ ? createIterableType(anyType) : anyArrayType;
+            }
+            // If the pattern has at least one element, and no rest element, then it should imply a tuple type.
+            var elementTypes = ts.map(elements, function (e) { return ts.isOmittedExpression(e) ? anyType : getTypeFromBindingElement(e, includePatternInType, reportErrors); });
+            var result = createTupleType(elementTypes);
+            if (includePatternInType) {
+                result = cloneTypeReference(result);
+                result.pattern = pattern;
+            }
+            return result;
+        }
+        // Return the type implied by a binding pattern. This is the type implied purely by the binding pattern itself
+        // and without regard to its context (i.e. without regard any type annotation or initializer associated with the
+        // declaration in which the binding pattern is contained). For example, the implied type of [x, y] is [any, any]
+        // and the implied type of { x, y: z = 1 } is { x: any; y: number; }. The type implied by a binding pattern is
+        // used as the contextual type of an initializer associated with the binding pattern. Also, for a destructuring
+        // parameter with no type annotation or initializer, the type implied by the binding pattern becomes the type of
+        // the parameter.
+        function getTypeFromBindingPattern(pattern, includePatternInType, reportErrors) {
+            if (includePatternInType === void 0) { includePatternInType = false; }
+            if (reportErrors === void 0) { reportErrors = false; }
+            return pattern.kind === 180 /* ObjectBindingPattern */
+                ? getTypeFromObjectBindingPattern(pattern, includePatternInType, reportErrors)
+                : getTypeFromArrayBindingPattern(pattern, includePatternInType, reportErrors);
+        }
+        // Return the type associated with a variable, parameter, or property declaration. In the simple case this is the type
+        // specified in a type annotation or inferred from an initializer. However, in the case of a destructuring declaration it
+        // is a bit more involved. For example:
+        //
+        //   var [x, s = ""] = [1, "one"];
+        //
+        // Here, the array literal [1, "one"] is contextually typed by the type [any, string], which is the implied type of the
+        // binding pattern [x, s = ""]. Because the contextual type is a tuple type, the resulting type of [1, "one"] is the
+        // tuple type [number, string]. Thus, the type inferred for 'x' is number and the type inferred for 's' is string.
+        function getWidenedTypeForVariableLikeDeclaration(declaration, reportErrors) {
+            var type = getTypeForVariableLikeDeclaration(declaration, /*includeOptionality*/ true);
+            if (type) {
+                if (reportErrors) {
+                    reportErrorsFromWidening(declaration, type);
+                }
+                // always widen a 'unique symbol' type if the type was created for a different declaration.
+                if (type.flags & 2048 /* UniqueESSymbol */ && (ts.isBindingElement(declaration) || !declaration.type) && type.symbol !== getSymbolOfNode(declaration)) {
+                    type = esSymbolType;
+                }
+                return getWidenedType(type);
+            }
+            // Rest parameters default to type any[], other parameters default to type any
+            type = ts.isParameter(declaration) && declaration.dotDotDotToken ? anyArrayType : anyType;
+            // Report implicit any errors unless this is a private property within an ambient declaration
+            if (reportErrors && noImplicitAny) {
+                if (!declarationBelongsToPrivateAmbientMember(declaration)) {
+                    reportImplicitAnyError(declaration, type);
+                }
+            }
+            return type;
+        }
+        function declarationBelongsToPrivateAmbientMember(declaration) {
+            var root = ts.getRootDeclaration(declaration);
+            var memberDeclaration = root.kind === 149 /* Parameter */ ? root.parent : root;
+            return isPrivateWithinAmbient(memberDeclaration);
+        }
+        function tryGetTypeFromEffectiveTypeNode(declaration) {
+            var typeNode = ts.getEffectiveTypeAnnotationNode(declaration);
+            if (typeNode) {
+                return getTypeFromTypeNode(typeNode);
+            }
+        }
+        function getTypeOfVariableOrParameterOrProperty(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                // Handle prototype property
+                if (symbol.flags & 4194304 /* Prototype */) {
+                    return links.type = getTypeOfPrototypeProperty(symbol);
+                }
+                // CommonsJS require and module both have type any.
+                if (symbol === requireSymbol || symbol === moduleSymbol) {
+                    return links.type = anyType;
+                }
+                // Handle catch clause variables
+                var declaration = symbol.valueDeclaration;
+                if (ts.isCatchClauseVariableDeclarationOrBindingElement(declaration)) {
+                    return links.type = anyType;
+                }
+                // Handle export default expressions
+                if (ts.isSourceFile(declaration)) {
+                    var jsonSourceFile = ts.cast(declaration, ts.isJsonSourceFile);
+                    return links.type = jsonSourceFile.statements.length ? checkExpression(jsonSourceFile.statements[0].expression) : emptyObjectType;
+                }
+                if (declaration.kind === 249 /* ExportAssignment */) {
+                    return links.type = checkExpression(declaration.expression);
+                }
+                if (ts.isInJavaScriptFile(declaration) && ts.isJSDocPropertyLikeTag(declaration) && declaration.typeExpression) {
+                    return links.type = getTypeFromTypeNode(declaration.typeExpression.type);
+                }
+                // Handle variable, parameter or property
+                if (!pushTypeResolution(symbol, 0 /* Type */)) {
+                    return errorType;
+                }
+                var type = void 0;
+                // Handle certain special assignment kinds, which happen to union across multiple declarations:
+                // * module.exports = expr
+                // * exports.p = expr
+                // * this.p = expr
+                // * className.prototype.method = expr
+                if (declaration.kind === 200 /* BinaryExpression */ ||
+                    declaration.kind === 185 /* PropertyAccessExpression */ && declaration.parent.kind === 200 /* BinaryExpression */) {
+                    type = getWidenedTypeFromJSSpecialPropertyDeclarations(symbol);
+                }
+                else if (ts.isJSDocPropertyLikeTag(declaration)
+                    || ts.isPropertyAccessExpression(declaration)
+                    || ts.isIdentifier(declaration)
+                    || ts.isClassDeclaration(declaration)
+                    || ts.isFunctionDeclaration(declaration)
+                    || (ts.isMethodDeclaration(declaration) && !ts.isObjectLiteralMethod(declaration))
+                    || ts.isMethodSignature(declaration)) {
+                    // Symbol is property of some kind that is merged with something - should use `getTypeOfFuncClassEnumModule` and not `getTypeOfVariableOrParameterOrProperty`
+                    if (symbol.flags & (16 /* Function */ | 8192 /* Method */ | 32 /* Class */ | 384 /* Enum */ | 512 /* ValueModule */)) {
+                        return getTypeOfFuncClassEnumModule(symbol);
+                    }
+                    type = tryGetTypeFromEffectiveTypeNode(declaration) || anyType;
+                }
+                else if (ts.isPropertyAssignment(declaration)) {
+                    type = tryGetTypeFromEffectiveTypeNode(declaration) || checkPropertyAssignment(declaration);
+                }
+                else if (ts.isJsxAttribute(declaration)) {
+                    type = tryGetTypeFromEffectiveTypeNode(declaration) || checkJsxAttribute(declaration);
+                }
+                else if (ts.isShorthandPropertyAssignment(declaration)) {
+                    type = tryGetTypeFromEffectiveTypeNode(declaration) || checkExpressionForMutableLocation(declaration.name, 0 /* Normal */);
+                }
+                else if (ts.isObjectLiteralMethod(declaration)) {
+                    type = tryGetTypeFromEffectiveTypeNode(declaration) || checkObjectLiteralMethod(declaration, 0 /* Normal */);
+                }
+                else if (ts.isParameter(declaration)
+                    || ts.isPropertyDeclaration(declaration)
+                    || ts.isPropertySignature(declaration)
+                    || ts.isVariableDeclaration(declaration)
+                    || ts.isBindingElement(declaration)) {
+                    type = getWidenedTypeForVariableLikeDeclaration(declaration, /*reportErrors*/ true);
+                }
+                else {
+                    return ts.Debug.fail("Unhandled declaration kind! " + ts.Debug.showSyntaxKind(declaration) + " for " + ts.Debug.showSymbol(symbol));
+                }
+                if (!popTypeResolution()) {
+                    type = reportCircularityError(symbol);
+                }
+                links.type = type;
+            }
+            return links.type;
+        }
+        function getAnnotatedAccessorType(accessor) {
+            if (accessor) {
+                if (accessor.kind === 156 /* GetAccessor */) {
+                    var getterTypeAnnotation = ts.getEffectiveReturnTypeNode(accessor);
+                    return getterTypeAnnotation && getTypeFromTypeNode(getterTypeAnnotation);
+                }
+                else {
+                    var setterTypeAnnotation = ts.getEffectiveSetAccessorTypeAnnotationNode(accessor);
+                    return setterTypeAnnotation && getTypeFromTypeNode(setterTypeAnnotation);
+                }
+            }
+            return undefined;
+        }
+        function getAnnotatedAccessorThisParameter(accessor) {
+            var parameter = getAccessorThisParameter(accessor);
+            return parameter && parameter.symbol;
+        }
+        function getThisTypeOfDeclaration(declaration) {
+            return getThisTypeOfSignature(getSignatureFromDeclaration(declaration));
+        }
+        function getTypeOfAccessors(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                var getter = ts.getDeclarationOfKind(symbol, 156 /* GetAccessor */);
+                var setter = ts.getDeclarationOfKind(symbol, 157 /* SetAccessor */);
+                if (getter && ts.isInJavaScriptFile(getter)) {
+                    var jsDocType = getTypeForDeclarationFromJSDocComment(getter);
+                    if (jsDocType) {
+                        return links.type = jsDocType;
+                    }
+                }
+                if (!pushTypeResolution(symbol, 0 /* Type */)) {
+                    return errorType;
+                }
+                var type = void 0;
+                // First try to see if the user specified a return type on the get-accessor.
+                var getterReturnType = getAnnotatedAccessorType(getter);
+                if (getterReturnType) {
+                    type = getterReturnType;
+                }
+                else {
+                    // If the user didn't specify a return type, try to use the set-accessor's parameter type.
+                    var setterParameterType = getAnnotatedAccessorType(setter);
+                    if (setterParameterType) {
+                        type = setterParameterType;
+                    }
+                    else {
+                        // If there are no specified types, try to infer it from the body of the get accessor if it exists.
+                        if (getter && getter.body) {
+                            type = getReturnTypeFromBody(getter);
+                        }
+                        // Otherwise, fall back to 'any'.
+                        else {
+                            if (noImplicitAny) {
+                                if (setter) {
+                                    error(setter, ts.Diagnostics.Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_parameter_type_annotation, symbolToString(symbol));
+                                }
+                                else {
+                                    ts.Debug.assert(!!getter, "there must existed getter as we are current checking either setter or getter in this function");
+                                    error(getter, ts.Diagnostics.Property_0_implicitly_has_type_any_because_its_get_accessor_lacks_a_return_type_annotation, symbolToString(symbol));
+                                }
+                            }
+                            type = anyType;
+                        }
+                    }
+                }
+                if (!popTypeResolution()) {
+                    type = anyType;
+                    if (noImplicitAny) {
+                        var getter_1 = ts.getDeclarationOfKind(symbol, 156 /* GetAccessor */);
+                        error(getter_1, ts.Diagnostics._0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions, symbolToString(symbol));
+                    }
+                }
+                links.type = type;
+            }
+            return links.type;
+        }
+        function getBaseTypeVariableOfClass(symbol) {
+            var baseConstructorType = getBaseConstructorTypeOfClass(getDeclaredTypeOfClassOrInterface(symbol));
+            return baseConstructorType.flags & 2162688 /* TypeVariable */ ? baseConstructorType : undefined;
+        }
+        function getTypeOfFuncClassEnumModule(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                var jsDeclaration = ts.getDeclarationOfJSInitializer(symbol.valueDeclaration);
+                if (jsDeclaration) {
+                    var jsSymbol = getSymbolOfNode(jsDeclaration);
+                    if (jsSymbol && (ts.hasEntries(jsSymbol.exports) || ts.hasEntries(jsSymbol.members))) {
+                        symbol = cloneSymbol(symbol);
+                        // note:we overwrite links because we just cloned the symbol
+                        links = symbol;
+                        if (ts.hasEntries(jsSymbol.exports)) {
+                            symbol.exports = symbol.exports || ts.createSymbolTable();
+                            mergeSymbolTable(symbol.exports, jsSymbol.exports);
+                        }
+                        if (ts.hasEntries(jsSymbol.members)) {
+                            symbol.members = symbol.members || ts.createSymbolTable();
+                            mergeSymbolTable(symbol.members, jsSymbol.members);
+                        }
+                    }
+                }
+                if (symbol.flags & 1536 /* Module */ && ts.isShorthandAmbientModuleSymbol(symbol)) {
+                    links.type = anyType;
+                }
+                else if (symbol.valueDeclaration.kind === 200 /* BinaryExpression */ ||
+                    symbol.valueDeclaration.kind === 185 /* PropertyAccessExpression */ && symbol.valueDeclaration.parent.kind === 200 /* BinaryExpression */) {
+                    links.type = getWidenedTypeFromJSSpecialPropertyDeclarations(symbol);
+                }
+                else {
+                    var type = createObjectType(16 /* Anonymous */, symbol);
+                    if (symbol.flags & 32 /* Class */) {
+                        var baseTypeVariable = getBaseTypeVariableOfClass(symbol);
+                        links.type = baseTypeVariable ? getIntersectionType([type, baseTypeVariable]) : type;
+                    }
+                    else {
+                        links.type = strictNullChecks && symbol.flags & 16777216 /* Optional */ ? getOptionalType(type) : type;
+                    }
+                }
+            }
+            return links.type;
+        }
+        function getTypeOfEnumMember(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                links.type = getDeclaredTypeOfEnumMember(symbol);
+            }
+            return links.type;
+        }
+        function getTypeOfAlias(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                var targetSymbol = resolveAlias(symbol);
+                // It only makes sense to get the type of a value symbol. If the result of resolving
+                // the alias is not a value, then it has no type. To get the type associated with a
+                // type symbol, call getDeclaredTypeOfSymbol.
+                // This check is important because without it, a call to getTypeOfSymbol could end
+                // up recursively calling getTypeOfAlias, causing a stack overflow.
+                links.type = targetSymbol.flags & 67216319 /* Value */
+                    ? getTypeOfSymbol(targetSymbol)
+                    : errorType;
+            }
+            return links.type;
+        }
+        function getTypeOfInstantiatedSymbol(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                if (symbolInstantiationDepth === 100) {
+                    error(symbol.valueDeclaration, ts.Diagnostics.Generic_type_instantiation_is_excessively_deep_and_possibly_infinite);
+                    links.type = errorType;
+                }
+                else {
+                    if (!pushTypeResolution(symbol, 0 /* Type */)) {
+                        return errorType;
+                    }
+                    symbolInstantiationDepth++;
+                    var type = instantiateType(getTypeOfSymbol(links.target), links.mapper);
+                    symbolInstantiationDepth--;
+                    if (!popTypeResolution()) {
+                        type = reportCircularityError(symbol);
+                    }
+                    links.type = type;
+                }
+            }
+            return links.type;
+        }
+        function reportCircularityError(symbol) {
+            // Check if variable has type annotation that circularly references the variable itself
+            if (ts.getEffectiveTypeAnnotationNode(symbol.valueDeclaration)) {
+                error(symbol.valueDeclaration, ts.Diagnostics._0_is_referenced_directly_or_indirectly_in_its_own_type_annotation, symbolToString(symbol));
+                return errorType;
+            }
+            // Otherwise variable has initializer that circularly references the variable itself
+            if (noImplicitAny) {
+                error(symbol.valueDeclaration, ts.Diagnostics._0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or_indirectly_in_its_own_initializer, symbolToString(symbol));
+            }
+            return anyType;
+        }
+        function getTypeOfSymbol(symbol) {
+            if (ts.getCheckFlags(symbol) & 1 /* Instantiated */) {
+                return getTypeOfInstantiatedSymbol(symbol);
+            }
+            if (ts.getCheckFlags(symbol) & 2048 /* ReverseMapped */) {
+                return getTypeOfReverseMappedSymbol(symbol);
+            }
+            if (symbol.flags & (3 /* Variable */ | 4 /* Property */)) {
+                return getTypeOfVariableOrParameterOrProperty(symbol);
+            }
+            if (symbol.flags & (16 /* Function */ | 8192 /* Method */ | 32 /* Class */ | 384 /* Enum */ | 512 /* ValueModule */)) {
+                return getTypeOfFuncClassEnumModule(symbol);
+            }
+            if (symbol.flags & 8 /* EnumMember */) {
+                return getTypeOfEnumMember(symbol);
+            }
+            if (symbol.flags & 98304 /* Accessor */) {
+                return getTypeOfAccessors(symbol);
+            }
+            if (symbol.flags & 2097152 /* Alias */) {
+                return getTypeOfAlias(symbol);
+            }
+            return errorType;
+        }
+        function isReferenceToType(type, target) {
+            return type !== undefined
+                && target !== undefined
+                && (ts.getObjectFlags(type) & 4 /* Reference */) !== 0
+                && type.target === target;
+        }
+        function getTargetType(type) {
+            return ts.getObjectFlags(type) & 4 /* Reference */ ? type.target : type;
+        }
+        // TODO: GH#18217 If `checkBase` is undefined, we should not call this because this will always return false.
+        function hasBaseType(type, checkBase) {
+            return check(type);
+            function check(type) {
+                if (ts.getObjectFlags(type) & (3 /* ClassOrInterface */ | 4 /* Reference */)) {
+                    var target = getTargetType(type);
+                    return target === checkBase || ts.some(getBaseTypes(target), check);
+                }
+                else if (type.flags & 524288 /* Intersection */) {
+                    return ts.some(type.types, check);
+                }
+                return false;
+            }
+        }
+        // Appends the type parameters given by a list of declarations to a set of type parameters and returns the resulting set.
+        // The function allocates a new array if the input type parameter set is undefined, but otherwise it modifies the set
+        // in-place and returns the same array.
+        function appendTypeParameters(typeParameters, declarations) {
+            for (var _i = 0, declarations_2 = declarations; _i < declarations_2.length; _i++) {
+                var declaration = declarations_2[_i];
+                typeParameters = ts.appendIfUnique(typeParameters, getDeclaredTypeOfTypeParameter(getSymbolOfNode(declaration)));
+            }
+            return typeParameters;
+        }
+        // Return the outer type parameters of a node or undefined if the node has no outer type parameters.
+        function getOuterTypeParameters(node, includeThisTypes) {
+            while (true) {
+                node = node.parent; // TODO: GH#18217 Use SourceFile kind check instead
+                if (!node) {
+                    return undefined;
+                }
+                switch (node.kind) {
+                    case 235 /* ClassDeclaration */:
+                    case 205 /* ClassExpression */:
+                    case 236 /* InterfaceDeclaration */:
+                    case 158 /* CallSignature */:
+                    case 159 /* ConstructSignature */:
+                    case 153 /* MethodSignature */:
+                    case 163 /* FunctionType */:
+                    case 164 /* ConstructorType */:
+                    case 284 /* JSDocFunctionType */:
+                    case 234 /* FunctionDeclaration */:
+                    case 154 /* MethodDeclaration */:
+                    case 192 /* FunctionExpression */:
+                    case 193 /* ArrowFunction */:
+                    case 237 /* TypeAliasDeclaration */:
+                    case 296 /* JSDocTemplateTag */:
+                    case 297 /* JSDocTypedefTag */:
+                    case 292 /* JSDocCallbackTag */:
+                    case 177 /* MappedType */:
+                    case 171 /* ConditionalType */:
+                        var outerTypeParameters = getOuterTypeParameters(node, includeThisTypes);
+                        if (node.kind === 177 /* MappedType */) {
+                            return ts.append(outerTypeParameters, getDeclaredTypeOfTypeParameter(getSymbolOfNode(node.typeParameter)));
+                        }
+                        else if (node.kind === 171 /* ConditionalType */) {
+                            return ts.concatenate(outerTypeParameters, getInferTypeParameters(node));
+                        }
+                        var outerAndOwnTypeParameters = appendTypeParameters(outerTypeParameters, ts.getEffectiveTypeParameterDeclarations(node));
+                        var thisType = includeThisTypes &&
+                            (node.kind === 235 /* ClassDeclaration */ || node.kind === 205 /* ClassExpression */ || node.kind === 236 /* InterfaceDeclaration */) &&
+                            getDeclaredTypeOfClassOrInterface(getSymbolOfNode(node)).thisType;
+                        return thisType ? ts.append(outerAndOwnTypeParameters, thisType) : outerAndOwnTypeParameters;
+                }
+            }
+        }
+        // The outer type parameters are those defined by enclosing generic classes, methods, or functions.
+        function getOuterTypeParametersOfClassOrInterface(symbol) {
+            var declaration = symbol.flags & 32 /* Class */ ? symbol.valueDeclaration : ts.getDeclarationOfKind(symbol, 236 /* InterfaceDeclaration */);
+            return getOuterTypeParameters(declaration);
+        }
+        // The local type parameters are the combined set of type parameters from all declarations of the class,
+        // interface, or type alias.
+        function getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol) {
+            var result;
+            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                var node = _a[_i];
+                if (node.kind === 236 /* InterfaceDeclaration */ ||
+                    node.kind === 235 /* ClassDeclaration */ ||
+                    node.kind === 205 /* ClassExpression */ ||
+                    ts.isTypeAlias(node)) {
+                    var declaration = node;
+                    result = appendTypeParameters(result, ts.getEffectiveTypeParameterDeclarations(declaration));
+                }
+            }
+            return result;
+        }
+        // The full set of type parameters for a generic class or interface type consists of its outer type parameters plus
+        // its locally declared type parameters.
+        function getTypeParametersOfClassOrInterface(symbol) {
+            return ts.concatenate(getOuterTypeParametersOfClassOrInterface(symbol), getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol));
+        }
+        // A type is a mixin constructor if it has a single construct signature taking no type parameters and a single
+        // rest parameter of type any[].
+        function isMixinConstructorType(type) {
+            var signatures = getSignaturesOfType(type, 1 /* Construct */);
+            if (signatures.length === 1) {
+                var s = signatures[0];
+                return !s.typeParameters && s.parameters.length === 1 && s.hasRestParameter && getTypeOfParameter(s.parameters[0]) === anyArrayType;
+            }
+            return false;
+        }
+        function isConstructorType(type) {
+            if (isValidBaseType(type) && getSignaturesOfType(type, 1 /* Construct */).length > 0) {
+                return true;
+            }
+            if (type.flags & 2162688 /* TypeVariable */) {
+                var constraint = getBaseConstraintOfType(type);
+                return !!constraint && isValidBaseType(constraint) && isMixinConstructorType(constraint);
+            }
+            return false;
+        }
+        function getBaseTypeNodeOfClass(type) {
+            var decl = type.symbol.valueDeclaration;
+            if (ts.isInJavaScriptFile(decl)) {
+                // Prefer an @augments tag because it may have type parameters.
+                var tag = ts.getJSDocAugmentsTag(decl);
+                if (tag) {
+                    return tag.class;
+                }
+            }
+            return ts.getClassExtendsHeritageClauseElement(decl);
+        }
+        function getConstructorsForTypeArguments(type, typeArgumentNodes, location) {
+            var typeArgCount = ts.length(typeArgumentNodes);
+            var isJavaScript = ts.isInJavaScriptFile(location);
+            return ts.filter(getSignaturesOfType(type, 1 /* Construct */), function (sig) { return (isJavaScript || typeArgCount >= getMinTypeArgumentCount(sig.typeParameters)) && typeArgCount <= ts.length(sig.typeParameters); });
+        }
+        function getInstantiatedConstructorsForTypeArguments(type, typeArgumentNodes, location) {
+            var signatures = getConstructorsForTypeArguments(type, typeArgumentNodes, location);
+            var typeArguments = ts.map(typeArgumentNodes, getTypeFromTypeNode);
+            return ts.sameMap(signatures, function (sig) { return ts.some(sig.typeParameters) ? getSignatureInstantiation(sig, typeArguments, ts.isInJavaScriptFile(location)) : sig; });
+        }
+        /**
+         * The base constructor of a class can resolve to
+         * * undefinedType if the class has no extends clause,
+         * * unknownType if an error occurred during resolution of the extends expression,
+         * * nullType if the extends expression is the null value,
+         * * anyType if the extends expression has type any, or
+         * * an object type with at least one construct signature.
+         */
+        function getBaseConstructorTypeOfClass(type) {
+            if (!type.resolvedBaseConstructorType) {
+                var decl = type.symbol.valueDeclaration;
+                var extended = ts.getClassExtendsHeritageClauseElement(decl);
+                var baseTypeNode = getBaseTypeNodeOfClass(type);
+                if (!baseTypeNode) {
+                    return type.resolvedBaseConstructorType = undefinedType;
+                }
+                if (!pushTypeResolution(type, 1 /* ResolvedBaseConstructorType */)) {
+                    return errorType;
+                }
+                var baseConstructorType = checkExpression(baseTypeNode.expression);
+                if (extended && baseTypeNode !== extended) {
+                    ts.Debug.assert(!extended.typeArguments); // Because this is in a JS file, and baseTypeNode is in an @extends tag
+                    checkExpression(extended.expression);
+                }
+                if (baseConstructorType.flags & (131072 /* Object */ | 524288 /* Intersection */)) {
+                    // Resolving the members of a class requires us to resolve the base class of that class.
+                    // We force resolution here such that we catch circularities now.
+                    resolveStructuredTypeMembers(baseConstructorType);
+                }
+                if (!popTypeResolution()) {
+                    error(type.symbol.valueDeclaration, ts.Diagnostics._0_is_referenced_directly_or_indirectly_in_its_own_base_expression, symbolToString(type.symbol));
+                    return type.resolvedBaseConstructorType = errorType;
+                }
+                if (!(baseConstructorType.flags & 1 /* Any */) && baseConstructorType !== nullWideningType && !isConstructorType(baseConstructorType)) {
+                    error(baseTypeNode.expression, ts.Diagnostics.Type_0_is_not_a_constructor_function_type, typeToString(baseConstructorType));
+                    return type.resolvedBaseConstructorType = errorType;
+                }
+                type.resolvedBaseConstructorType = baseConstructorType;
+            }
+            return type.resolvedBaseConstructorType;
+        }
+        function getBaseTypes(type) {
+            if (!type.resolvedBaseTypes) {
+                if (type.objectFlags & 8 /* Tuple */) {
+                    type.resolvedBaseTypes = [createArrayType(getUnionType(type.typeParameters))];
+                }
+                else if (type.symbol.flags & (32 /* Class */ | 64 /* Interface */)) {
+                    if (type.symbol.flags & 32 /* Class */) {
+                        resolveBaseTypesOfClass(type);
+                    }
+                    if (type.symbol.flags & 64 /* Interface */) {
+                        resolveBaseTypesOfInterface(type);
+                    }
+                }
+                else {
+                    ts.Debug.fail("type must be class or interface");
+                }
+            }
+            return type.resolvedBaseTypes;
+        }
+        function resolveBaseTypesOfClass(type) {
+            type.resolvedBaseTypes = ts.resolvingEmptyArray;
+            var baseConstructorType = getApparentType(getBaseConstructorTypeOfClass(type));
+            if (!(baseConstructorType.flags & (131072 /* Object */ | 524288 /* Intersection */ | 1 /* Any */))) {
+                return type.resolvedBaseTypes = ts.emptyArray;
+            }
+            var baseTypeNode = getBaseTypeNodeOfClass(type);
+            var typeArgs = typeArgumentsFromTypeReferenceNode(baseTypeNode);
+            var baseType;
+            var originalBaseType = baseConstructorType && baseConstructorType.symbol ? getDeclaredTypeOfSymbol(baseConstructorType.symbol) : undefined;
+            if (baseConstructorType.symbol && baseConstructorType.symbol.flags & 32 /* Class */ &&
+                areAllOuterTypeParametersApplied(originalBaseType)) {
+                // When base constructor type is a class with no captured type arguments we know that the constructors all have the same type parameters as the
+                // class and all return the instance type of the class. There is no need for further checks and we can apply the
+                // type arguments in the same manner as a type reference to get the same error reporting experience.
+                baseType = getTypeFromClassOrInterfaceReference(baseTypeNode, baseConstructorType.symbol, typeArgs);
+            }
+            else if (baseConstructorType.flags & 1 /* Any */) {
+                baseType = baseConstructorType;
+            }
+            else {
+                // The class derives from a "class-like" constructor function, check that we have at least one construct signature
+                // with a matching number of type parameters and use the return type of the first instantiated signature. Elsewhere
+                // we check that all instantiated signatures return the same type.
+                var constructors = getInstantiatedConstructorsForTypeArguments(baseConstructorType, baseTypeNode.typeArguments, baseTypeNode);
+                if (!constructors.length) {
+                    error(baseTypeNode.expression, ts.Diagnostics.No_base_constructor_has_the_specified_number_of_type_arguments);
+                    return type.resolvedBaseTypes = ts.emptyArray;
+                }
+                baseType = getReturnTypeOfSignature(constructors[0]);
+            }
+            if (baseType === errorType) {
+                return type.resolvedBaseTypes = ts.emptyArray;
+            }
+            if (!isValidBaseType(baseType)) {
+                error(baseTypeNode.expression, ts.Diagnostics.Base_constructor_return_type_0_is_not_a_class_or_interface_type, typeToString(baseType));
+                return type.resolvedBaseTypes = ts.emptyArray;
+            }
+            if (type === baseType || hasBaseType(baseType, type)) {
+                error(type.symbol.valueDeclaration, ts.Diagnostics.Type_0_recursively_references_itself_as_a_base_type, typeToString(type, /*enclosingDeclaration*/ undefined, 2 /* WriteArrayAsGenericType */));
+                return type.resolvedBaseTypes = ts.emptyArray;
+            }
+            if (type.resolvedBaseTypes === ts.resolvingEmptyArray) {
+                // Circular reference, likely through instantiation of default parameters
+                // (otherwise there'd be an error from hasBaseType) - this is fine, but `.members` should be reset
+                // as `getIndexedAccessType` via `instantiateType` via `getTypeFromClassOrInterfaceReference` forces a
+                // partial instantiation of the members without the base types fully resolved
+                type.members = undefined; // TODO: GH#18217
+            }
+            return type.resolvedBaseTypes = [baseType];
+        }
+        function areAllOuterTypeParametersApplied(type) {
+            // An unapplied type parameter has its symbol still the same as the matching argument symbol.
+            // Since parameters are applied outer-to-inner, only the last outer parameter needs to be checked.
+            var outerTypeParameters = type.outerTypeParameters;
+            if (outerTypeParameters) {
+                var last_1 = outerTypeParameters.length - 1;
+                var typeArguments = type.typeArguments;
+                return outerTypeParameters[last_1].symbol !== typeArguments[last_1].symbol;
+            }
+            return true;
+        }
+        // A valid base type is `any`, any non-generic object type or intersection of non-generic
+        // object types.
+        function isValidBaseType(type) {
+            return !!(type.flags & (131072 /* Object */ | 16777216 /* NonPrimitive */ | 1 /* Any */)) && !isGenericMappedType(type) ||
+                !!(type.flags & 524288 /* Intersection */) && ts.every(type.types, isValidBaseType);
+        }
+        function resolveBaseTypesOfInterface(type) {
+            type.resolvedBaseTypes = type.resolvedBaseTypes || ts.emptyArray;
+            for (var _i = 0, _a = type.symbol.declarations; _i < _a.length; _i++) {
+                var declaration = _a[_i];
+                if (declaration.kind === 236 /* InterfaceDeclaration */ && ts.getInterfaceBaseTypeNodes(declaration)) {
+                    for (var _b = 0, _c = ts.getInterfaceBaseTypeNodes(declaration); _b < _c.length; _b++) {
+                        var node = _c[_b];
+                        var baseType = getTypeFromTypeNode(node);
+                        if (baseType !== errorType) {
+                            if (isValidBaseType(baseType)) {
+                                if (type !== baseType && !hasBaseType(baseType, type)) {
+                                    if (type.resolvedBaseTypes === ts.emptyArray) {
+                                        type.resolvedBaseTypes = [baseType];
+                                    }
+                                    else {
+                                        type.resolvedBaseTypes.push(baseType);
+                                    }
+                                }
+                                else {
+                                    error(declaration, ts.Diagnostics.Type_0_recursively_references_itself_as_a_base_type, typeToString(type, /*enclosingDeclaration*/ undefined, 2 /* WriteArrayAsGenericType */));
+                                }
+                            }
+                            else {
+                                error(node, ts.Diagnostics.An_interface_may_only_extend_a_class_or_another_interface);
+                            }
+                        }
+                    }
+                }
+            }
+        }
+        /**
+         * Returns true if the interface given by the symbol is free of "this" references.
+         *
+         * Specifically, the result is true if the interface itself contains no references
+         * to "this" in its body, if all base types are interfaces,
+         * and if none of the base interfaces have a "this" type.
+         */
+        function isThislessInterface(symbol) {
+            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                var declaration = _a[_i];
+                if (declaration.kind === 236 /* InterfaceDeclaration */) {
+                    if (declaration.flags & 64 /* ContainsThis */) {
+                        return false;
+                    }
+                    var baseTypeNodes = ts.getInterfaceBaseTypeNodes(declaration);
+                    if (baseTypeNodes) {
+                        for (var _b = 0, baseTypeNodes_1 = baseTypeNodes; _b < baseTypeNodes_1.length; _b++) {
+                            var node = baseTypeNodes_1[_b];
+                            if (ts.isEntityNameExpression(node.expression)) {
+                                var baseSymbol = resolveEntityName(node.expression, 67901928 /* Type */, /*ignoreErrors*/ true);
+                                if (!baseSymbol || !(baseSymbol.flags & 64 /* Interface */) || getDeclaredTypeOfClassOrInterface(baseSymbol).thisType) {
+                                    return false;
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+            return true;
+        }
+        function getDeclaredTypeOfClassOrInterface(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.declaredType) {
+                var kind = symbol.flags & 32 /* Class */ ? 1 /* Class */ : 2 /* Interface */;
+                var type = links.declaredType = createObjectType(kind, symbol);
+                var outerTypeParameters = getOuterTypeParametersOfClassOrInterface(symbol);
+                var localTypeParameters = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol);
+                // A class or interface is generic if it has type parameters or a "this" type. We always give classes a "this" type
+                // because it is not feasible to analyze all members to determine if the "this" type escapes the class (in particular,
+                // property types inferred from initializers and method return types inferred from return statements are very hard
+                // to exhaustively analyze). We give interfaces a "this" type if we can't definitely determine that they are free of
+                // "this" references.
+                if (outerTypeParameters || localTypeParameters || kind === 1 /* Class */ || !isThislessInterface(symbol)) {
+                    type.objectFlags |= 4 /* Reference */;
+                    type.typeParameters = ts.concatenate(outerTypeParameters, localTypeParameters);
+                    type.outerTypeParameters = outerTypeParameters;
+                    type.localTypeParameters = localTypeParameters;
+                    type.instantiations = ts.createMap();
+                    type.instantiations.set(getTypeListId(type.typeParameters), type);
+                    type.target = type;
+                    type.typeArguments = type.typeParameters;
+                    type.thisType = createType(65536 /* TypeParameter */);
+                    type.thisType.isThisType = true;
+                    type.thisType.symbol = symbol;
+                    type.thisType.constraint = type;
+                }
+            }
+            return links.declaredType;
+        }
+        function getDeclaredTypeOfTypeAlias(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.declaredType) {
+                // Note that we use the links object as the target here because the symbol object is used as the unique
+                // identity for resolution of the 'type' property in SymbolLinks.
+                if (!pushTypeResolution(symbol, 2 /* DeclaredType */)) {
+                    return errorType;
+                }
+                var declaration = ts.find(symbol.declarations, function (d) {
+                    return ts.isJSDocTypeAlias(d) || d.kind === 237 /* TypeAliasDeclaration */;
+                });
+                var typeNode = ts.isJSDocTypeAlias(declaration) ? declaration.typeExpression : declaration.type;
+                // If typeNode is missing, we will error in checkJSDocTypedefTag.
+                var type = typeNode ? getTypeFromTypeNode(typeNode) : errorType;
+                if (popTypeResolution()) {
+                    var typeParameters = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol);
+                    if (typeParameters) {
+                        // Initialize the instantiation cache for generic type aliases. The declared type corresponds to
+                        // an instantiation of the type alias with the type parameters supplied as type arguments.
+                        links.typeParameters = typeParameters;
+                        links.instantiations = ts.createMap();
+                        links.instantiations.set(getTypeListId(typeParameters), type);
+                    }
+                }
+                else {
+                    type = errorType;
+                    error(declaration.name, ts.Diagnostics.Type_alias_0_circularly_references_itself, symbolToString(symbol));
+                }
+                links.declaredType = type;
+            }
+            return links.declaredType;
+        }
+        function isStringConcatExpression(expr) {
+            if (expr.kind === 9 /* StringLiteral */) {
+                return true;
+            }
+            else if (expr.kind === 200 /* BinaryExpression */) {
+                return isStringConcatExpression(expr.left) && isStringConcatExpression(expr.right);
+            }
+            return false;
+        }
+        function isLiteralEnumMember(member) {
+            var expr = member.initializer;
+            if (!expr) {
+                return !(member.flags & 4194304 /* Ambient */);
+            }
+            switch (expr.kind) {
+                case 9 /* StringLiteral */:
+                case 8 /* NumericLiteral */:
+                    return true;
+                case 198 /* PrefixUnaryExpression */:
+                    return expr.operator === 38 /* MinusToken */ &&
+                        expr.operand.kind === 8 /* NumericLiteral */;
+                case 71 /* Identifier */:
+                    return ts.nodeIsMissing(expr) || !!getSymbolOfNode(member.parent).exports.get(expr.escapedText);
+                case 200 /* BinaryExpression */:
+                    return isStringConcatExpression(expr);
+                default:
+                    return false;
+            }
+        }
+        function getEnumKind(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (links.enumKind !== undefined) {
+                return links.enumKind;
+            }
+            var hasNonLiteralMember = false;
+            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                var declaration = _a[_i];
+                if (declaration.kind === 238 /* EnumDeclaration */) {
+                    for (var _b = 0, _c = declaration.members; _b < _c.length; _b++) {
+                        var member = _c[_b];
+                        if (member.initializer && member.initializer.kind === 9 /* StringLiteral */) {
+                            return links.enumKind = 1 /* Literal */;
+                        }
+                        if (!isLiteralEnumMember(member)) {
+                            hasNonLiteralMember = true;
+                        }
+                    }
+                }
+            }
+            return links.enumKind = hasNonLiteralMember ? 0 /* Numeric */ : 1 /* Literal */;
+        }
+        function getBaseTypeOfEnumLiteralType(type) {
+            return type.flags & 512 /* EnumLiteral */ && !(type.flags & 262144 /* Union */) ? getDeclaredTypeOfSymbol(getParentOfSymbol(type.symbol)) : type;
+        }
+        function getDeclaredTypeOfEnum(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (links.declaredType) {
+                return links.declaredType;
+            }
+            if (getEnumKind(symbol) === 1 /* Literal */) {
+                enumCount++;
+                var memberTypeList = [];
+                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                    var declaration = _a[_i];
+                    if (declaration.kind === 238 /* EnumDeclaration */) {
+                        for (var _b = 0, _c = declaration.members; _b < _c.length; _b++) {
+                            var member = _c[_b];
+                            var memberType = getLiteralType(getEnumMemberValue(member), enumCount, getSymbolOfNode(member)); // TODO: GH#18217
+                            getSymbolLinks(getSymbolOfNode(member)).declaredType = memberType;
+                            memberTypeList.push(memberType);
+                        }
+                    }
+                }
+                if (memberTypeList.length) {
+                    var enumType_1 = getUnionType(memberTypeList, 1 /* Literal */, symbol, /*aliasTypeArguments*/ undefined);
+                    if (enumType_1.flags & 262144 /* Union */) {
+                        enumType_1.flags |= 512 /* EnumLiteral */;
+                        enumType_1.symbol = symbol;
+                    }
+                    return links.declaredType = enumType_1;
+                }
+            }
+            var enumType = createType(32 /* Enum */);
+            enumType.symbol = symbol;
+            return links.declaredType = enumType;
+        }
+        function getDeclaredTypeOfEnumMember(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.declaredType) {
+                var enumType = getDeclaredTypeOfEnum(getParentOfSymbol(symbol));
+                if (!links.declaredType) {
+                    links.declaredType = enumType;
+                }
+            }
+            return links.declaredType;
+        }
+        function getDeclaredTypeOfTypeParameter(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.declaredType) {
+                var type = createType(65536 /* TypeParameter */);
+                type.symbol = symbol;
+                links.declaredType = type;
+            }
+            return links.declaredType;
+        }
+        function getDeclaredTypeOfAlias(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.declaredType) {
+                links.declaredType = getDeclaredTypeOfSymbol(resolveAlias(symbol));
+            }
+            return links.declaredType;
+        }
+        function getDeclaredTypeOfSymbol(symbol) {
+            return tryGetDeclaredTypeOfSymbol(symbol) || errorType;
+        }
+        function tryGetDeclaredTypeOfSymbol(symbol) {
+            if (symbol.flags & (32 /* Class */ | 64 /* Interface */)) {
+                return getDeclaredTypeOfClassOrInterface(symbol);
+            }
+            if (symbol.flags & 524288 /* TypeAlias */) {
+                return getDeclaredTypeOfTypeAlias(symbol);
+            }
+            if (symbol.flags & 262144 /* TypeParameter */) {
+                return getDeclaredTypeOfTypeParameter(symbol);
+            }
+            if (symbol.flags & 384 /* Enum */) {
+                return getDeclaredTypeOfEnum(symbol);
+            }
+            if (symbol.flags & 8 /* EnumMember */) {
+                return getDeclaredTypeOfEnumMember(symbol);
+            }
+            if (symbol.flags & 2097152 /* Alias */) {
+                return getDeclaredTypeOfAlias(symbol);
+            }
+            return undefined;
+        }
+        /**
+         * A type is free of this references if it's the any, string, number, boolean, symbol, or void keyword, a string
+         * literal type, an array with an element type that is free of this references, or a type reference that is
+         * free of this references.
+         */
+        function isThislessType(node) {
+            switch (node.kind) {
+                case 119 /* AnyKeyword */:
+                case 142 /* UnknownKeyword */:
+                case 137 /* StringKeyword */:
+                case 134 /* NumberKeyword */:
+                case 122 /* BooleanKeyword */:
+                case 138 /* SymbolKeyword */:
+                case 135 /* ObjectKeyword */:
+                case 105 /* VoidKeyword */:
+                case 140 /* UndefinedKeyword */:
+                case 95 /* NullKeyword */:
+                case 131 /* NeverKeyword */:
+                case 178 /* LiteralType */:
+                    return true;
+                case 167 /* ArrayType */:
+                    return isThislessType(node.elementType);
+                case 162 /* TypeReference */:
+                    return !node.typeArguments || node.typeArguments.every(isThislessType);
+            }
+            return false;
+        }
+        /** A type parameter is thisless if its contraint is thisless, or if it has no constraint. */
+        function isThislessTypeParameter(node) {
+            return !node.constraint || isThislessType(node.constraint);
+        }
+        /**
+         * A variable-like declaration is free of this references if it has a type annotation
+         * that is thisless, or if it has no type annotation and no initializer (and is thus of type any).
+         */
+        function isThislessVariableLikeDeclaration(node) {
+            var typeNode = ts.getEffectiveTypeAnnotationNode(node);
+            return typeNode ? isThislessType(typeNode) : !ts.hasInitializer(node);
+        }
+        /**
+         * A function-like declaration is considered free of `this` references if it has a return type
+         * annotation that is free of this references and if each parameter is thisless and if
+         * each type parameter (if present) is thisless.
+         */
+        function isThislessFunctionLikeDeclaration(node) {
+            var returnType = ts.getEffectiveReturnTypeNode(node);
+            var typeParameters = ts.getEffectiveTypeParameterDeclarations(node);
+            return (node.kind === 155 /* Constructor */ || (!!returnType && isThislessType(returnType))) &&
+                node.parameters.every(isThislessVariableLikeDeclaration) &&
+                typeParameters.every(isThislessTypeParameter);
+        }
+        /**
+         * Returns true if the class or interface member given by the symbol is free of "this" references. The
+         * function may return false for symbols that are actually free of "this" references because it is not
+         * feasible to perform a complete analysis in all cases. In particular, property members with types
+         * inferred from their initializers and function members with inferred return types are conservatively
+         * assumed not to be free of "this" references.
+         */
+        function isThisless(symbol) {
+            if (symbol.declarations && symbol.declarations.length === 1) {
+                var declaration = symbol.declarations[0];
+                if (declaration) {
+                    switch (declaration.kind) {
+                        case 152 /* PropertyDeclaration */:
+                        case 151 /* PropertySignature */:
+                            return isThislessVariableLikeDeclaration(declaration);
+                        case 154 /* MethodDeclaration */:
+                        case 153 /* MethodSignature */:
+                        case 155 /* Constructor */:
+                            return isThislessFunctionLikeDeclaration(declaration);
+                    }
+                }
+            }
+            return false;
+        }
+        // The mappingThisOnly flag indicates that the only type parameter being mapped is "this". When the flag is true,
+        // we check symbols to see if we can quickly conclude they are free of "this" references, thus needing no instantiation.
+        function createInstantiatedSymbolTable(symbols, mapper, mappingThisOnly) {
+            var result = ts.createSymbolTable();
+            for (var _i = 0, symbols_2 = symbols; _i < symbols_2.length; _i++) {
+                var symbol = symbols_2[_i];
+                result.set(symbol.escapedName, mappingThisOnly && isThisless(symbol) ? symbol : instantiateSymbol(symbol, mapper));
+            }
+            return result;
+        }
+        function addInheritedMembers(symbols, baseSymbols) {
+            for (var _i = 0, baseSymbols_1 = baseSymbols; _i < baseSymbols_1.length; _i++) {
+                var s = baseSymbols_1[_i];
+                if (!symbols.has(s.escapedName)) {
+                    symbols.set(s.escapedName, s);
+                }
+            }
+        }
+        function resolveDeclaredMembers(type) {
+            if (!type.declaredProperties) {
+                var symbol = type.symbol;
+                var members = getMembersOfSymbol(symbol);
+                type.declaredProperties = getNamedMembers(members);
+                // Start with signatures at empty array in case of recursive types
+                type.declaredCallSignatures = ts.emptyArray;
+                type.declaredConstructSignatures = ts.emptyArray;
+                type.declaredCallSignatures = getSignaturesOfSymbol(members.get("__call" /* Call */));
+                type.declaredConstructSignatures = getSignaturesOfSymbol(members.get("__new" /* New */));
+                type.declaredStringIndexInfo = getIndexInfoOfSymbol(symbol, 0 /* String */);
+                type.declaredNumberIndexInfo = getIndexInfoOfSymbol(symbol, 1 /* Number */);
+            }
+            return type;
+        }
+        /**
+         * Indicates whether a type can be used as a late-bound name.
+         */
+        function isTypeUsableAsLateBoundName(type) {
+            return !!(type.flags & 2240 /* StringOrNumberLiteralOrUnique */);
+        }
+        /**
+         * Indicates whether a declaration name is definitely late-bindable.
+         * A declaration name is only late-bindable if:
+         * - It is a `ComputedPropertyName`.
+         * - Its expression is an `Identifier` or either a `PropertyAccessExpression` an
+         * `ElementAccessExpression` consisting only of these same three types of nodes.
+         * - The type of its expression is a string or numeric literal type, or is a `unique symbol` type.
+         */
+        function isLateBindableName(node) {
+            return ts.isComputedPropertyName(node)
+                && ts.isEntityNameExpression(node.expression)
+                && isTypeUsableAsLateBoundName(checkComputedPropertyName(node));
+        }
+        /**
+         * Indicates whether a declaration has a late-bindable dynamic name.
+         */
+        function hasLateBindableName(node) {
+            var name = ts.getNameOfDeclaration(node);
+            return !!name && isLateBindableName(name);
+        }
+        /**
+         * Indicates whether a declaration has a dynamic name that cannot be late-bound.
+         */
+        function hasNonBindableDynamicName(node) {
+            return ts.hasDynamicName(node) && !hasLateBindableName(node);
+        }
+        /**
+         * Indicates whether a declaration name is a dynamic name that cannot be late-bound.
+         */
+        function isNonBindableDynamicName(node) {
+            return ts.isDynamicName(node) && !isLateBindableName(node);
+        }
+        /**
+         * Gets the symbolic name for a late-bound member from its type.
+         */
+        function getLateBoundNameFromType(type) {
+            if (type.flags & 2048 /* UniqueESSymbol */) {
+                return "__@" + type.symbol.escapedName + "@" + getSymbolId(type.symbol);
+            }
+            if (type.flags & 192 /* StringOrNumberLiteral */) {
+                return ts.escapeLeadingUnderscores("" + type.value);
+            }
+            return ts.Debug.fail();
+        }
+        /**
+         * Adds a declaration to a late-bound dynamic member. This performs the same function for
+         * late-bound members that `addDeclarationToSymbol` in binder.ts performs for early-bound
+         * members.
+         */
+        function addDeclarationToLateBoundSymbol(symbol, member, symbolFlags) {
+            ts.Debug.assert(!!(ts.getCheckFlags(symbol) & 1024 /* Late */), "Expected a late-bound symbol.");
+            symbol.flags |= symbolFlags;
+            getSymbolLinks(member.symbol).lateSymbol = symbol;
+            if (!symbol.declarations) {
+                symbol.declarations = [member];
+            }
+            else {
+                symbol.declarations.push(member);
+            }
+            if (symbolFlags & 67216319 /* Value */) {
+                if (!symbol.valueDeclaration || symbol.valueDeclaration.kind !== member.kind) {
+                    symbol.valueDeclaration = member;
+                }
+            }
+        }
+        /**
+         * Performs late-binding of a dynamic member. This performs the same function for
+         * late-bound members that `declareSymbol` in binder.ts performs for early-bound
+         * members.
+         *
+         * If a symbol is a dynamic name from a computed property, we perform an additional "late"
+         * binding phase to attempt to resolve the name for the symbol from the type of the computed
+         * property's expression. If the type of the expression is a string-literal, numeric-literal,
+         * or unique symbol type, we can use that type as the name of the symbol.
+         *
+         * For example, given:
+         *
+         *   const x = Symbol();
+         *
+         *   interface I {
+         *     [x]: number;
+         *   }
+         *
+         * The binder gives the property `[x]: number` a special symbol with the name "__computed".
+         * In the late-binding phase we can type-check the expression `x` and see that it has a
+         * unique symbol type which we can then use as the name of the member. This allows users
+         * to define custom symbols that can be used in the members of an object type.
+         *
+         * @param parent The containing symbol for the member.
+         * @param earlySymbols The early-bound symbols of the parent.
+         * @param lateSymbols The late-bound symbols of the parent.
+         * @param decl The member to bind.
+         */
+        function lateBindMember(parent, earlySymbols, lateSymbols, decl) {
+            ts.Debug.assert(!!decl.symbol, "The member is expected to have a symbol.");
+            var links = getNodeLinks(decl);
+            if (!links.resolvedSymbol) {
+                // In the event we attempt to resolve the late-bound name of this member recursively,
+                // fall back to the early-bound name of this member.
+                links.resolvedSymbol = decl.symbol;
+                var type = checkComputedPropertyName(decl.name);
+                if (isTypeUsableAsLateBoundName(type)) {
+                    var memberName = getLateBoundNameFromType(type);
+                    var symbolFlags = decl.symbol.flags;
+                    // Get or add a late-bound symbol for the member. This allows us to merge late-bound accessor declarations.
+                    var lateSymbol = lateSymbols.get(memberName);
+                    if (!lateSymbol)
+                        lateSymbols.set(memberName, lateSymbol = createSymbol(0 /* None */, memberName, 1024 /* Late */));
+                    // Report an error if a late-bound member has the same name as an early-bound member,
+                    // or if we have another early-bound symbol declaration with the same name and
+                    // conflicting flags.
+                    var earlySymbol = earlySymbols && earlySymbols.get(memberName);
+                    if (lateSymbol.flags & getExcludedSymbolFlags(symbolFlags) || earlySymbol) {
+                        // If we have an existing early-bound member, combine its declarations so that we can
+                        // report an error at each declaration.
+                        var declarations = earlySymbol ? ts.concatenate(earlySymbol.declarations, lateSymbol.declarations) : lateSymbol.declarations;
+                        var name_2 = ts.declarationNameToString(decl.name);
+                        ts.forEach(declarations, function (declaration) { return error(ts.getNameOfDeclaration(declaration) || declaration, ts.Diagnostics.Duplicate_declaration_0, name_2); });
+                        error(decl.name || decl, ts.Diagnostics.Duplicate_declaration_0, name_2);
+                        lateSymbol = createSymbol(0 /* None */, memberName, 1024 /* Late */);
+                    }
+                    lateSymbol.nameType = type;
+                    addDeclarationToLateBoundSymbol(lateSymbol, decl, symbolFlags);
+                    if (lateSymbol.parent) {
+                        ts.Debug.assert(lateSymbol.parent === parent, "Existing symbol parent should match new one");
+                    }
+                    else {
+                        lateSymbol.parent = parent;
+                    }
+                    return links.resolvedSymbol = lateSymbol;
+                }
+            }
+            return links.resolvedSymbol;
+        }
+        function getResolvedMembersOrExportsOfSymbol(symbol, resolutionKind) {
+            var links = getSymbolLinks(symbol);
+            if (!links[resolutionKind]) {
+                var isStatic = resolutionKind === "resolvedExports" /* resolvedExports */;
+                var earlySymbols = !isStatic ? symbol.members :
+                    symbol.flags & 1536 /* Module */ ? getExportsOfModuleWorker(symbol) :
+                        symbol.exports;
+                // In the event we recursively resolve the members/exports of the symbol, we
+                // set the initial value of resolvedMembers/resolvedExports to the early-bound
+                // members/exports of the symbol.
+                links[resolutionKind] = earlySymbols || emptySymbols;
+                // fill in any as-yet-unresolved late-bound members.
+                var lateSymbols = ts.createSymbolTable();
+                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                    var decl = _a[_i];
+                    var members = ts.getMembersOfDeclaration(decl);
+                    if (members) {
+                        for (var _b = 0, members_4 = members; _b < members_4.length; _b++) {
+                            var member = members_4[_b];
+                            if (isStatic === ts.hasStaticModifier(member) && hasLateBindableName(member)) {
+                                lateBindMember(symbol, earlySymbols, lateSymbols, member);
+                            }
+                        }
+                    }
+                }
+                links[resolutionKind] = combineSymbolTables(earlySymbols, lateSymbols) || emptySymbols;
+            }
+            return links[resolutionKind];
+        }
+        /**
+         * Gets a SymbolTable containing both the early- and late-bound members of a symbol.
+         *
+         * For a description of late-binding, see `lateBindMember`.
+         */
+        function getMembersOfSymbol(symbol) {
+            return symbol.flags & 6240 /* LateBindingContainer */
+                ? getResolvedMembersOrExportsOfSymbol(symbol, "resolvedMembers" /* resolvedMembers */)
+                : symbol.members || emptySymbols;
+        }
+        /**
+         * If a symbol is the dynamic name of the member of an object type, get the late-bound
+         * symbol of the member.
+         *
+         * For a description of late-binding, see `lateBindMember`.
+         */
+        function getLateBoundSymbol(symbol) {
+            if (symbol.flags & 106500 /* ClassMember */ && symbol.escapedName === "__computed" /* Computed */) {
+                var links = getSymbolLinks(symbol);
+                if (!links.lateSymbol && ts.some(symbol.declarations, hasLateBindableName)) {
+                    // force late binding of members/exports. This will set the late-bound symbol
+                    if (ts.some(symbol.declarations, ts.hasStaticModifier)) {
+                        getExportsOfSymbol(symbol.parent);
+                    }
+                    else {
+                        getMembersOfSymbol(symbol.parent);
+                    }
+                }
+                return links.lateSymbol || (links.lateSymbol = symbol);
+            }
+            return symbol;
+        }
+        function getTypeWithThisArgument(type, thisArgument, needApparentType) {
+            if (ts.getObjectFlags(type) & 4 /* Reference */) {
+                var target = type.target;
+                var typeArguments = type.typeArguments;
+                if (ts.length(target.typeParameters) === ts.length(typeArguments)) {
+                    var ref = createTypeReference(target, ts.concatenate(typeArguments, [thisArgument || target.thisType]));
+                    return needApparentType ? getApparentType(ref) : ref;
+                }
+            }
+            else if (type.flags & 524288 /* Intersection */) {
+                return getIntersectionType(ts.map(type.types, function (t) { return getTypeWithThisArgument(t, thisArgument, needApparentType); }));
+            }
+            return needApparentType ? getApparentType(type) : type;
+        }
+        function resolveObjectTypeMembers(type, source, typeParameters, typeArguments) {
+            var mapper;
+            var members;
+            var callSignatures;
+            var constructSignatures;
+            var stringIndexInfo;
+            var numberIndexInfo;
+            if (ts.rangeEquals(typeParameters, typeArguments, 0, typeParameters.length)) {
+                mapper = identityMapper;
+                members = source.symbol ? getMembersOfSymbol(source.symbol) : ts.createSymbolTable(source.declaredProperties);
+                callSignatures = source.declaredCallSignatures;
+                constructSignatures = source.declaredConstructSignatures;
+                stringIndexInfo = source.declaredStringIndexInfo;
+                numberIndexInfo = source.declaredNumberIndexInfo;
+            }
+            else {
+                mapper = createTypeMapper(typeParameters, typeArguments);
+                members = createInstantiatedSymbolTable(source.declaredProperties, mapper, /*mappingThisOnly*/ typeParameters.length === 1);
+                callSignatures = instantiateSignatures(source.declaredCallSignatures, mapper);
+                constructSignatures = instantiateSignatures(source.declaredConstructSignatures, mapper);
+                stringIndexInfo = instantiateIndexInfo(source.declaredStringIndexInfo, mapper);
+                numberIndexInfo = instantiateIndexInfo(source.declaredNumberIndexInfo, mapper);
+            }
+            var baseTypes = getBaseTypes(source);
+            if (baseTypes.length) {
+                if (source.symbol && members === getMembersOfSymbol(source.symbol)) {
+                    members = ts.createSymbolTable(source.declaredProperties);
+                }
+                setStructuredTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+                var thisArgument = ts.lastOrUndefined(typeArguments);
+                for (var _i = 0, baseTypes_1 = baseTypes; _i < baseTypes_1.length; _i++) {
+                    var baseType = baseTypes_1[_i];
+                    var instantiatedBaseType = thisArgument ? getTypeWithThisArgument(instantiateType(baseType, mapper), thisArgument) : baseType;
+                    addInheritedMembers(members, getPropertiesOfType(instantiatedBaseType));
+                    callSignatures = ts.concatenate(callSignatures, getSignaturesOfType(instantiatedBaseType, 0 /* Call */));
+                    constructSignatures = ts.concatenate(constructSignatures, getSignaturesOfType(instantiatedBaseType, 1 /* Construct */));
+                    if (!stringIndexInfo) {
+                        stringIndexInfo = instantiatedBaseType === anyType ?
+                            createIndexInfo(anyType, /*isReadonly*/ false) :
+                            getIndexInfoOfType(instantiatedBaseType, 0 /* String */);
+                    }
+                    numberIndexInfo = numberIndexInfo || getIndexInfoOfType(instantiatedBaseType, 1 /* Number */);
+                }
+            }
+            setStructuredTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+        }
+        function resolveClassOrInterfaceMembers(type) {
+            resolveObjectTypeMembers(type, resolveDeclaredMembers(type), ts.emptyArray, ts.emptyArray);
+        }
+        function resolveTypeReferenceMembers(type) {
+            var source = resolveDeclaredMembers(type.target);
+            var typeParameters = ts.concatenate(source.typeParameters, [source.thisType]);
+            var typeArguments = type.typeArguments && type.typeArguments.length === typeParameters.length ?
+                type.typeArguments : ts.concatenate(type.typeArguments, [type]);
+            resolveObjectTypeMembers(type, source, typeParameters, typeArguments);
+        }
+        function createSignature(declaration, typeParameters, thisParameter, parameters, resolvedReturnType, resolvedTypePredicate, minArgumentCount, hasRestParameter, hasLiteralTypes) {
+            var sig = new Signature(checker);
+            sig.declaration = declaration;
+            sig.typeParameters = typeParameters;
+            sig.parameters = parameters;
+            sig.thisParameter = thisParameter;
+            sig.resolvedReturnType = resolvedReturnType;
+            sig.resolvedTypePredicate = resolvedTypePredicate;
+            sig.minArgumentCount = minArgumentCount;
+            sig.hasRestParameter = hasRestParameter;
+            sig.hasLiteralTypes = hasLiteralTypes;
+            sig.target = undefined;
+            sig.mapper = undefined;
+            return sig;
+        }
+        function cloneSignature(sig) {
+            return createSignature(sig.declaration, sig.typeParameters, sig.thisParameter, sig.parameters, /*resolvedReturnType*/ undefined, 
+            /*resolvedTypePredicate*/ undefined, sig.minArgumentCount, sig.hasRestParameter, sig.hasLiteralTypes);
+        }
+        function getDefaultConstructSignatures(classType) {
+            var baseConstructorType = getBaseConstructorTypeOfClass(classType);
+            var baseSignatures = getSignaturesOfType(baseConstructorType, 1 /* Construct */);
+            if (baseSignatures.length === 0) {
+                return [createSignature(undefined, classType.localTypeParameters, undefined, ts.emptyArray, classType, /*resolvedTypePredicate*/ undefined, 0, /*hasRestParameter*/ false, /*hasLiteralTypes*/ false)]; // TODO: GH#18217
+            }
+            var baseTypeNode = getBaseTypeNodeOfClass(classType);
+            var isJavaScript = ts.isInJavaScriptFile(baseTypeNode);
+            var typeArguments = typeArgumentsFromTypeReferenceNode(baseTypeNode);
+            var typeArgCount = ts.length(typeArguments);
+            var result = [];
+            for (var _i = 0, baseSignatures_1 = baseSignatures; _i < baseSignatures_1.length; _i++) {
+                var baseSig = baseSignatures_1[_i];
+                var minTypeArgumentCount = getMinTypeArgumentCount(baseSig.typeParameters);
+                var typeParamCount = ts.length(baseSig.typeParameters);
+                if (isJavaScript || typeArgCount >= minTypeArgumentCount && typeArgCount <= typeParamCount) {
+                    var sig = typeParamCount ? createSignatureInstantiation(baseSig, fillMissingTypeArguments(typeArguments, baseSig.typeParameters, minTypeArgumentCount, isJavaScript)) : cloneSignature(baseSig);
+                    sig.typeParameters = classType.localTypeParameters;
+                    sig.resolvedReturnType = classType;
+                    result.push(sig);
+                }
+            }
+            return result;
+        }
+        function findMatchingSignature(signatureList, signature, partialMatch, ignoreThisTypes, ignoreReturnTypes) {
+            for (var _i = 0, signatureList_1 = signatureList; _i < signatureList_1.length; _i++) {
+                var s = signatureList_1[_i];
+                if (compareSignaturesIdentical(s, signature, partialMatch, ignoreThisTypes, ignoreReturnTypes, compareTypesIdentical)) {
+                    return s;
+                }
+            }
+        }
+        function findMatchingSignatures(signatureLists, signature, listIndex) {
+            if (signature.typeParameters) {
+                // We require an exact match for generic signatures, so we only return signatures from the first
+                // signature list and only if they have exact matches in the other signature lists.
+                if (listIndex > 0) {
+                    return undefined;
+                }
+                for (var i = 1; i < signatureLists.length; i++) {
+                    if (!findMatchingSignature(signatureLists[i], signature, /*partialMatch*/ false, /*ignoreThisTypes*/ false, /*ignoreReturnTypes*/ false)) {
+                        return undefined;
+                    }
+                }
+                return [signature];
+            }
+            var result;
+            for (var i = 0; i < signatureLists.length; i++) {
+                // Allow matching non-generic signatures to have excess parameters and different return types
+                var match = i === listIndex ? signature : findMatchingSignature(signatureLists[i], signature, /*partialMatch*/ true, /*ignoreThisTypes*/ true, /*ignoreReturnTypes*/ true);
+                if (!match) {
+                    return undefined;
+                }
+                result = ts.appendIfUnique(result, match);
+            }
+            return result;
+        }
+        // The signatures of a union type are those signatures that are present in each of the constituent types.
+        // Generic signatures must match exactly, but non-generic signatures are allowed to have extra optional
+        // parameters and may differ in return types. When signatures differ in return types, the resulting return
+        // type is the union of the constituent return types.
+        function getUnionSignatures(types, kind) {
+            var signatureLists = ts.map(types, function (t) { return getSignaturesOfType(t, kind); });
+            var result;
+            for (var i = 0; i < signatureLists.length; i++) {
+                for (var _i = 0, _a = signatureLists[i]; _i < _a.length; _i++) {
+                    var signature = _a[_i];
+                    // Only process signatures with parameter lists that aren't already in the result list
+                    if (!result || !findMatchingSignature(result, signature, /*partialMatch*/ false, /*ignoreThisTypes*/ true, /*ignoreReturnTypes*/ true)) {
+                        var unionSignatures = findMatchingSignatures(signatureLists, signature, i);
+                        if (unionSignatures) {
+                            var s = signature;
+                            // Union the result types when more than one signature matches
+                            if (unionSignatures.length > 1) {
+                                var thisParameter = signature.thisParameter;
+                                if (ts.forEach(unionSignatures, function (sig) { return sig.thisParameter; })) {
+                                    // TODO: GH#18217 We tested that *some* has thisParameter and now act as if *all* do
+                                    var thisType = getUnionType(ts.map(unionSignatures, function (sig) { return sig.thisParameter ? getTypeOfSymbol(sig.thisParameter) : anyType; }), 2 /* Subtype */);
+                                    thisParameter = createSymbolWithType(signature.thisParameter, thisType);
+                                }
+                                s = cloneSignature(signature);
+                                s.thisParameter = thisParameter;
+                                s.unionSignatures = unionSignatures;
+                            }
+                            (result || (result = [])).push(s);
+                        }
+                    }
+                }
+            }
+            return result || ts.emptyArray;
+        }
+        function getUnionIndexInfo(types, kind) {
+            var indexTypes = [];
+            var isAnyReadonly = false;
+            for (var _i = 0, types_2 = types; _i < types_2.length; _i++) {
+                var type = types_2[_i];
+                var indexInfo = getIndexInfoOfType(type, kind);
+                if (!indexInfo) {
+                    return undefined;
+                }
+                indexTypes.push(indexInfo.type);
+                isAnyReadonly = isAnyReadonly || indexInfo.isReadonly;
+            }
+            return createIndexInfo(getUnionType(indexTypes, 2 /* Subtype */), isAnyReadonly);
+        }
+        function resolveUnionTypeMembers(type) {
+            // The members and properties collections are empty for union types. To get all properties of a union
+            // type use getPropertiesOfType (only the language service uses this).
+            var callSignatures = getUnionSignatures(type.types, 0 /* Call */);
+            var constructSignatures = getUnionSignatures(type.types, 1 /* Construct */);
+            var stringIndexInfo = getUnionIndexInfo(type.types, 0 /* String */);
+            var numberIndexInfo = getUnionIndexInfo(type.types, 1 /* Number */);
+            setStructuredTypeMembers(type, emptySymbols, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+        }
+        function intersectTypes(type1, type2) {
+            return !type1 ? type2 : !type2 ? type1 : getIntersectionType([type1, type2]);
+        }
+        function intersectIndexInfos(info1, info2) {
+            return !info1 ? info2 : !info2 ? info1 : createIndexInfo(getIntersectionType([info1.type, info2.type]), info1.isReadonly && info2.isReadonly);
+        }
+        function unionSpreadIndexInfos(info1, info2) {
+            return info1 && info2 && createIndexInfo(getUnionType([info1.type, info2.type]), info1.isReadonly || info2.isReadonly);
+        }
+        function includeMixinType(type, types, index) {
+            var mixedTypes = [];
+            for (var i = 0; i < types.length; i++) {
+                if (i === index) {
+                    mixedTypes.push(type);
+                }
+                else if (isMixinConstructorType(types[i])) {
+                    mixedTypes.push(getReturnTypeOfSignature(getSignaturesOfType(types[i], 1 /* Construct */)[0]));
+                }
+            }
+            return getIntersectionType(mixedTypes);
+        }
+        function resolveIntersectionTypeMembers(type) {
+            // The members and properties collections are empty for intersection types. To get all properties of an
+            // intersection type use getPropertiesOfType (only the language service uses this).
+            var callSignatures = ts.emptyArray;
+            var constructSignatures = ts.emptyArray;
+            var stringIndexInfo;
+            var numberIndexInfo;
+            var types = type.types;
+            var mixinCount = ts.countWhere(types, isMixinConstructorType);
+            var _loop_5 = function (i) {
+                var t = type.types[i];
+                // When an intersection type contains mixin constructor types, the construct signatures from
+                // those types are discarded and their return types are mixed into the return types of all
+                // other construct signatures in the intersection type. For example, the intersection type
+                // '{ new(...args: any[]) => A } & { new(s: string) => B }' has a single construct signature
+                // 'new(s: string) => A & B'.
+                if (mixinCount === 0 || mixinCount === types.length && i === 0 || !isMixinConstructorType(t)) {
+                    var signatures = getSignaturesOfType(t, 1 /* Construct */);
+                    if (signatures.length && mixinCount > 0) {
+                        signatures = ts.map(signatures, function (s) {
+                            var clone = cloneSignature(s);
+                            clone.resolvedReturnType = includeMixinType(getReturnTypeOfSignature(s), types, i);
+                            return clone;
+                        });
+                    }
+                    constructSignatures = ts.concatenate(constructSignatures, signatures);
+                }
+                callSignatures = ts.concatenate(callSignatures, getSignaturesOfType(t, 0 /* Call */));
+                stringIndexInfo = intersectIndexInfos(stringIndexInfo, getIndexInfoOfType(t, 0 /* String */));
+                numberIndexInfo = intersectIndexInfos(numberIndexInfo, getIndexInfoOfType(t, 1 /* Number */));
+            };
+            for (var i = 0; i < types.length; i++) {
+                _loop_5(i);
+            }
+            setStructuredTypeMembers(type, emptySymbols, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+        }
+        /**
+         * Converts an AnonymousType to a ResolvedType.
+         */
+        function resolveAnonymousTypeMembers(type) {
+            var symbol = type.symbol;
+            if (type.target) {
+                var members = createInstantiatedSymbolTable(getPropertiesOfObjectType(type.target), type.mapper, /*mappingThisOnly*/ false);
+                var callSignatures = instantiateSignatures(getSignaturesOfType(type.target, 0 /* Call */), type.mapper);
+                var constructSignatures = instantiateSignatures(getSignaturesOfType(type.target, 1 /* Construct */), type.mapper);
+                var stringIndexInfo = instantiateIndexInfo(getIndexInfoOfType(type.target, 0 /* String */), type.mapper);
+                var numberIndexInfo = instantiateIndexInfo(getIndexInfoOfType(type.target, 1 /* Number */), type.mapper);
+                setStructuredTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+            }
+            else if (symbol.flags & 2048 /* TypeLiteral */) {
+                var members = getMembersOfSymbol(symbol);
+                var callSignatures = getSignaturesOfSymbol(members.get("__call" /* Call */));
+                var constructSignatures = getSignaturesOfSymbol(members.get("__new" /* New */));
+                var stringIndexInfo = getIndexInfoOfSymbol(symbol, 0 /* String */);
+                var numberIndexInfo = getIndexInfoOfSymbol(symbol, 1 /* Number */);
+                setStructuredTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+            }
+            else {
+                // Combinations of function, class, enum and module
+                var members = emptySymbols;
+                var stringIndexInfo = void 0;
+                if (symbol.exports) {
+                    members = getExportsOfSymbol(symbol);
+                }
+                setStructuredTypeMembers(type, members, ts.emptyArray, ts.emptyArray, undefined, undefined);
+                if (symbol.flags & 32 /* Class */) {
+                    var classType = getDeclaredTypeOfClassOrInterface(symbol);
+                    var baseConstructorType = getBaseConstructorTypeOfClass(classType);
+                    if (baseConstructorType.flags & (131072 /* Object */ | 524288 /* Intersection */ | 2162688 /* TypeVariable */)) {
+                        members = ts.createSymbolTable(getNamedMembers(members));
+                        addInheritedMembers(members, getPropertiesOfType(baseConstructorType));
+                    }
+                    else if (baseConstructorType === anyType) {
+                        stringIndexInfo = createIndexInfo(anyType, /*isReadonly*/ false);
+                    }
+                }
+                var numberIndexInfo = symbol.flags & 384 /* Enum */ ? enumNumberIndexInfo : undefined;
+                setStructuredTypeMembers(type, members, ts.emptyArray, ts.emptyArray, stringIndexInfo, numberIndexInfo);
+                // We resolve the members before computing the signatures because a signature may use
+                // typeof with a qualified name expression that circularly references the type we are
+                // in the process of resolving (see issue #6072). The temporarily empty signature list
+                // will never be observed because a qualified name can't reference signatures.
+                if (symbol.flags & (16 /* Function */ | 8192 /* Method */)) {
+                    type.callSignatures = getSignaturesOfSymbol(symbol);
+                }
+                // And likewise for construct signatures for classes
+                if (symbol.flags & 32 /* Class */) {
+                    var classType = getDeclaredTypeOfClassOrInterface(symbol);
+                    var constructSignatures = getSignaturesOfSymbol(symbol.members.get("__constructor" /* Constructor */));
+                    if (!constructSignatures.length) {
+                        constructSignatures = getDefaultConstructSignatures(classType);
+                    }
+                    type.constructSignatures = constructSignatures;
+                }
+            }
+        }
+        function resolveReverseMappedTypeMembers(type) {
+            var indexInfo = getIndexInfoOfType(type.source, 0 /* String */);
+            var modifiers = getMappedTypeModifiers(type.mappedType);
+            var readonlyMask = modifiers & 1 /* IncludeReadonly */ ? false : true;
+            var optionalMask = modifiers & 4 /* IncludeOptional */ ? 0 : 16777216 /* Optional */;
+            var stringIndexInfo = indexInfo && createIndexInfo(inferReverseMappedType(indexInfo.type, type.mappedType), readonlyMask && indexInfo.isReadonly);
+            var members = ts.createSymbolTable();
+            for (var _i = 0, _a = getPropertiesOfType(type.source); _i < _a.length; _i++) {
+                var prop = _a[_i];
+                var checkFlags = 2048 /* ReverseMapped */ | (readonlyMask && isReadonlySymbol(prop) ? 8 /* Readonly */ : 0);
+                var inferredProp = createSymbol(4 /* Property */ | prop.flags & optionalMask, prop.escapedName, checkFlags);
+                inferredProp.declarations = prop.declarations;
+                inferredProp.nameType = prop.nameType;
+                inferredProp.propertyType = getTypeOfSymbol(prop);
+                inferredProp.mappedType = type.mappedType;
+                members.set(prop.escapedName, inferredProp);
+            }
+            setStructuredTypeMembers(type, members, ts.emptyArray, ts.emptyArray, stringIndexInfo, undefined);
+        }
+        /** Resolve the members of a mapped type { [P in K]: T } */
+        function resolveMappedTypeMembers(type) {
+            var members = ts.createSymbolTable();
+            var stringIndexInfo;
+            var numberIndexInfo;
+            // Resolve upfront such that recursive references see an empty object type.
+            setStructuredTypeMembers(type, emptySymbols, ts.emptyArray, ts.emptyArray, undefined, undefined);
+            // In { [P in K]: T }, we refer to P as the type parameter type, K as the constraint type,
+            // and T as the template type.
+            var typeParameter = getTypeParameterFromMappedType(type);
+            var constraintType = getConstraintTypeFromMappedType(type);
+            var templateType = getTemplateTypeFromMappedType(type.target || type);
+            var modifiersType = getApparentType(getModifiersTypeFromMappedType(type)); // The 'T' in 'keyof T'
+            var templateModifiers = getMappedTypeModifiers(type);
+            var include = keyofStringsOnly ? 64 /* StringLiteral */ : 2240 /* StringOrNumberLiteralOrUnique */;
+            if (isMappedTypeWithKeyofConstraintDeclaration(type)) {
+                // We have a { [P in keyof T]: X }
+                for (var _i = 0, _a = getPropertiesOfType(modifiersType); _i < _a.length; _i++) {
+                    var prop = _a[_i];
+                    addMemberForKeyType(getLiteralTypeFromPropertyName(prop, include), /*_index*/ undefined, prop);
+                }
+                if (modifiersType.flags & 1 /* Any */ || getIndexInfoOfType(modifiersType, 0 /* String */)) {
+                    addMemberForKeyType(stringType);
+                }
+                if (!keyofStringsOnly && getIndexInfoOfType(modifiersType, 1 /* Number */)) {
+                    addMemberForKeyType(numberType);
+                }
+            }
+            else {
+                // First, if the constraint type is a type parameter, obtain the base constraint. Then,
+                // if the key type is a 'keyof X', obtain 'keyof C' where C is the base constraint of X.
+                // Finally, iterate over the constituents of the resulting iteration type.
+                var keyType = constraintType.flags & 14745600 /* InstantiableNonPrimitive */ ? getApparentType(constraintType) : constraintType;
+                var iterationType = keyType.flags & 1048576 /* Index */ ? getIndexType(getApparentType(keyType.type)) : keyType;
+                forEachType(iterationType, addMemberForKeyType);
+            }
+            setStructuredTypeMembers(type, members, ts.emptyArray, ts.emptyArray, stringIndexInfo, numberIndexInfo);
+            function addMemberForKeyType(t, _index, origin) {
+                // Create a mapper from T to the current iteration type constituent. Then, if the
+                // mapped type is itself an instantiated type, combine the iteration mapper with the
+                // instantiation mapper.
+                var templateMapper = combineTypeMappers(type.mapper, createTypeMapper([typeParameter], [t]));
+                var propType = instantiateType(templateType, templateMapper);
+                // If the current iteration type constituent is a string literal type, create a property.
+                // Otherwise, for type string create a string index signature.
+                if (t.flags & 2240 /* StringOrNumberLiteralOrUnique */) {
+                    var propName = getLateBoundNameFromType(t);
+                    var modifiersProp = getPropertyOfType(modifiersType, propName);
+                    var isOptional = !!(templateModifiers & 4 /* IncludeOptional */ ||
+                        !(templateModifiers & 8 /* ExcludeOptional */) && modifiersProp && modifiersProp.flags & 16777216 /* Optional */);
+                    var isReadonly = !!(templateModifiers & 1 /* IncludeReadonly */ ||
+                        !(templateModifiers & 2 /* ExcludeReadonly */) && modifiersProp && isReadonlySymbol(modifiersProp));
+                    var prop = createSymbol(4 /* Property */ | (isOptional ? 16777216 /* Optional */ : 0), propName, isReadonly ? 8 /* Readonly */ : 0);
+                    // When creating an optional property in strictNullChecks mode, if 'undefined' isn't assignable to the
+                    // type, we include 'undefined' in the type. Similarly, when creating a non-optional property in strictNullChecks
+                    // mode, if the underlying property is optional we remove 'undefined' from the type.
+                    prop.type = strictNullChecks && isOptional && !isTypeAssignableTo(undefinedType, propType) ? getOptionalType(propType) :
+                        strictNullChecks && !isOptional && modifiersProp && modifiersProp.flags & 16777216 /* Optional */ ? getTypeWithFacts(propType, 131072 /* NEUndefined */) :
+                            propType;
+                    if (origin) {
+                        prop.syntheticOrigin = origin;
+                        prop.declarations = origin.declarations;
+                    }
+                    prop.nameType = t;
+                    members.set(propName, prop);
+                }
+                else if (t.flags & (1 /* Any */ | 4 /* String */)) {
+                    stringIndexInfo = createIndexInfo(propType, !!(templateModifiers & 1 /* IncludeReadonly */));
+                }
+                else if (t.flags & 8 /* Number */) {
+                    numberIndexInfo = createIndexInfo(propType, !!(templateModifiers & 1 /* IncludeReadonly */));
+                }
+            }
+        }
+        function getTypeParameterFromMappedType(type) {
+            return type.typeParameter ||
+                (type.typeParameter = getDeclaredTypeOfTypeParameter(getSymbolOfNode(type.declaration.typeParameter)));
+        }
+        function getConstraintTypeFromMappedType(type) {
+            return type.constraintType ||
+                (type.constraintType = instantiateType(getConstraintOfTypeParameter(getTypeParameterFromMappedType(type)), type.mapper || identityMapper) || errorType);
+        }
+        function getTemplateTypeFromMappedType(type) {
+            return type.templateType ||
+                (type.templateType = type.declaration.type ?
+                    instantiateType(addOptionality(getTypeFromTypeNode(type.declaration.type), !!(getMappedTypeModifiers(type) & 4 /* IncludeOptional */)), type.mapper || identityMapper) :
+                    errorType);
+        }
+        function getConstraintDeclarationForMappedType(type) {
+            return type.declaration.typeParameter.constraint;
+        }
+        function isMappedTypeWithKeyofConstraintDeclaration(type) {
+            var constraintDeclaration = getConstraintDeclarationForMappedType(type); // TODO: GH#18217
+            return constraintDeclaration.kind === 175 /* TypeOperator */ &&
+                constraintDeclaration.operator === 128 /* KeyOfKeyword */;
+        }
+        function getModifiersTypeFromMappedType(type) {
+            if (!type.modifiersType) {
+                if (isMappedTypeWithKeyofConstraintDeclaration(type)) {
+                    // If the constraint declaration is a 'keyof T' node, the modifiers type is T. We check
+                    // AST nodes here because, when T is a non-generic type, the logic below eagerly resolves
+                    // 'keyof T' to a literal union type and we can't recover T from that type.
+                    type.modifiersType = instantiateType(getTypeFromTypeNode(getConstraintDeclarationForMappedType(type).type), type.mapper || identityMapper);
+                }
+                else {
+                    // Otherwise, get the declared constraint type, and if the constraint type is a type parameter,
+                    // get the constraint of that type parameter. If the resulting type is an indexed type 'keyof T',
+                    // the modifiers type is T. Otherwise, the modifiers type is {}.
+                    var declaredType = getTypeFromMappedTypeNode(type.declaration);
+                    var constraint = getConstraintTypeFromMappedType(declaredType);
+                    var extendedConstraint = constraint && constraint.flags & 65536 /* TypeParameter */ ? getConstraintOfTypeParameter(constraint) : constraint;
+                    type.modifiersType = extendedConstraint && extendedConstraint.flags & 1048576 /* Index */ ? instantiateType(extendedConstraint.type, type.mapper || identityMapper) : emptyObjectType;
+                }
+            }
+            return type.modifiersType;
+        }
+        function getMappedTypeModifiers(type) {
+            var declaration = type.declaration;
+            return (declaration.readonlyToken ? declaration.readonlyToken.kind === 38 /* MinusToken */ ? 2 /* ExcludeReadonly */ : 1 /* IncludeReadonly */ : 0) |
+                (declaration.questionToken ? declaration.questionToken.kind === 38 /* MinusToken */ ? 8 /* ExcludeOptional */ : 4 /* IncludeOptional */ : 0);
+        }
+        function getMappedTypeOptionality(type) {
+            var modifiers = getMappedTypeModifiers(type);
+            return modifiers & 8 /* ExcludeOptional */ ? -1 : modifiers & 4 /* IncludeOptional */ ? 1 : 0;
+        }
+        function getCombinedMappedTypeOptionality(type) {
+            var optionality = getMappedTypeOptionality(type);
+            var modifiersType = getModifiersTypeFromMappedType(type);
+            return optionality || (isGenericMappedType(modifiersType) ? getMappedTypeOptionality(modifiersType) : 0);
+        }
+        function isPartialMappedType(type) {
+            return !!(ts.getObjectFlags(type) & 32 /* Mapped */ && getMappedTypeModifiers(type) & 4 /* IncludeOptional */);
+        }
+        function isGenericMappedType(type) {
+            return !!(ts.getObjectFlags(type) & 32 /* Mapped */) && isGenericIndexType(getConstraintTypeFromMappedType(type));
+        }
+        function resolveStructuredTypeMembers(type) {
+            if (!type.members) {
+                if (type.flags & 131072 /* Object */) {
+                    if (type.objectFlags & 4 /* Reference */) {
+                        resolveTypeReferenceMembers(type);
+                    }
+                    else if (type.objectFlags & 3 /* ClassOrInterface */) {
+                        resolveClassOrInterfaceMembers(type);
+                    }
+                    else if (type.objectFlags & 2048 /* ReverseMapped */) {
+                        resolveReverseMappedTypeMembers(type);
+                    }
+                    else if (type.objectFlags & 16 /* Anonymous */) {
+                        resolveAnonymousTypeMembers(type);
+                    }
+                    else if (type.objectFlags & 32 /* Mapped */) {
+                        resolveMappedTypeMembers(type);
+                    }
+                }
+                else if (type.flags & 262144 /* Union */) {
+                    resolveUnionTypeMembers(type);
+                }
+                else if (type.flags & 524288 /* Intersection */) {
+                    resolveIntersectionTypeMembers(type);
+                }
+            }
+            return type;
+        }
+        /** Return properties of an object type or an empty array for other types */
+        function getPropertiesOfObjectType(type) {
+            if (type.flags & 131072 /* Object */) {
+                return resolveStructuredTypeMembers(type).properties;
+            }
+            return ts.emptyArray;
+        }
+        /** If the given type is an object type and that type has a property by the given name,
+         * return the symbol for that property. Otherwise return undefined.
+         */
+        function getPropertyOfObjectType(type, name) {
+            if (type.flags & 131072 /* Object */) {
+                var resolved = resolveStructuredTypeMembers(type);
+                var symbol = resolved.members.get(name);
+                if (symbol && symbolIsValue(symbol)) {
+                    return symbol;
+                }
+            }
+        }
+        function getPropertiesOfUnionOrIntersectionType(type) {
+            if (!type.resolvedProperties) {
+                var members = ts.createSymbolTable();
+                for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                    var current = _a[_i];
+                    for (var _b = 0, _c = getPropertiesOfType(current); _b < _c.length; _b++) {
+                        var prop = _c[_b];
+                        if (!members.has(prop.escapedName)) {
+                            var combinedProp = getPropertyOfUnionOrIntersectionType(type, prop.escapedName);
+                            if (combinedProp) {
+                                members.set(prop.escapedName, combinedProp);
+                            }
+                        }
+                    }
+                    // The properties of a union type are those that are present in all constituent types, so
+                    // we only need to check the properties of the first type
+                    if (type.flags & 262144 /* Union */) {
+                        break;
+                    }
+                }
+                type.resolvedProperties = getNamedMembers(members);
+            }
+            return type.resolvedProperties;
+        }
+        function getPropertiesOfType(type) {
+            type = getApparentType(type);
+            return type.flags & 786432 /* UnionOrIntersection */ ?
+                getPropertiesOfUnionOrIntersectionType(type) :
+                getPropertiesOfObjectType(type);
+        }
+        function getAllPossiblePropertiesOfTypes(types) {
+            var unionType = getUnionType(types);
+            if (!(unionType.flags & 262144 /* Union */)) {
+                return getAugmentedPropertiesOfType(unionType);
+            }
+            var props = ts.createSymbolTable();
+            for (var _i = 0, types_3 = types; _i < types_3.length; _i++) {
+                var memberType = types_3[_i];
+                for (var _a = 0, _b = getAugmentedPropertiesOfType(memberType); _a < _b.length; _a++) {
+                    var escapedName = _b[_a].escapedName;
+                    if (!props.has(escapedName)) {
+                        var prop = createUnionOrIntersectionProperty(unionType, escapedName);
+                        // May be undefined if the property is private
+                        if (prop)
+                            props.set(escapedName, prop);
+                    }
+                }
+            }
+            return ts.arrayFrom(props.values());
+        }
+        function getConstraintOfType(type) {
+            return type.flags & 65536 /* TypeParameter */ ? getConstraintOfTypeParameter(type) :
+                type.flags & 2097152 /* IndexedAccess */ ? getConstraintOfIndexedAccess(type) :
+                    type.flags & 4194304 /* Conditional */ ? getConstraintOfConditionalType(type) :
+                        getBaseConstraintOfType(type);
+        }
+        function getConstraintOfTypeParameter(typeParameter) {
+            return hasNonCircularBaseConstraint(typeParameter) ? getConstraintFromTypeParameter(typeParameter) : undefined;
+        }
+        function getConstraintOfIndexedAccess(type) {
+            var objectType = getBaseConstraintOfType(type.objectType) || type.objectType;
+            var indexType = getBaseConstraintOfType(type.indexType) || type.indexType;
+            var constraint = !isGenericObjectType(objectType) && !isGenericIndexType(indexType) ? getIndexedAccessType(objectType, indexType) : undefined;
+            return constraint && constraint !== errorType ? constraint : undefined;
+        }
+        function getDefaultConstraintOfConditionalType(type) {
+            if (!type.resolvedDefaultConstraint) {
+                var rootTrueType = type.root.trueType;
+                var rootTrueConstraint = rootTrueType.flags & 8388608 /* Substitution */ ? rootTrueType.substitute : rootTrueType;
+                type.resolvedDefaultConstraint = getUnionType([instantiateType(rootTrueConstraint, type.combinedMapper || type.mapper), getFalseTypeFromConditionalType(type)]);
+            }
+            return type.resolvedDefaultConstraint;
+        }
+        function getConstraintOfDistributiveConditionalType(type) {
+            // Check if we have a conditional type of the form 'T extends U ? X : Y', where T is a constrained
+            // type parameter. If so, create an instantiation of the conditional type where T is replaced
+            // with its constraint. We do this because if the constraint is a union type it will be distributed
+            // over the conditional type and possibly reduced. For example, 'T extends undefined ? never : T'
+            // removes 'undefined' from T.
+            if (type.root.isDistributive) {
+                var constraint = getConstraintOfType(getSimplifiedType(type.checkType));
+                if (constraint) {
+                    var mapper = makeUnaryTypeMapper(type.root.checkType, constraint);
+                    var instantiated = getConditionalTypeInstantiation(type, combineTypeMappers(mapper, type.mapper));
+                    if (!(instantiated.flags & 32768 /* Never */)) {
+                        return instantiated;
+                    }
+                }
+            }
+            return undefined;
+        }
+        function getConstraintOfConditionalType(type) {
+            return getConstraintOfDistributiveConditionalType(type) || getDefaultConstraintOfConditionalType(type);
+        }
+        function getUnionConstraintOfIntersection(type, targetIsUnion) {
+            var constraints;
+            var hasDisjointDomainType = false;
+            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                var t = _a[_i];
+                if (t.flags & 15794176 /* Instantiable */) {
+                    // We keep following constraints as long as we have an instantiable type that is known
+                    // not to be circular or infinite (hence we stop on index access types).
+                    var constraint = getConstraintOfType(t);
+                    while (constraint && constraint.flags & (65536 /* TypeParameter */ | 1048576 /* Index */ | 4194304 /* Conditional */)) {
+                        constraint = getConstraintOfType(constraint);
+                    }
+                    if (constraint) {
+                        // A constraint that isn't a union type implies that the final type would be a non-union
+                        // type as well. Since non-union constraints are of no interest, we can exit here.
+                        if (!(constraint.flags & 262144 /* Union */)) {
+                            return undefined;
+                        }
+                        constraints = ts.append(constraints, constraint);
+                    }
+                }
+                else if (t.flags & 16809468 /* DisjointDomains */) {
+                    hasDisjointDomainType = true;
+                }
+            }
+            // If the target is a union type or if we are intersecting with types belonging to one of the
+            // disjoint domans, we may end up producing a constraint that hasn't been examined before.
+            if (constraints && (targetIsUnion || hasDisjointDomainType)) {
+                if (hasDisjointDomainType) {
+                    // We add any types belong to one of the disjoint domans because they might cause the final
+                    // intersection operation to reduce the union constraints.
+                    for (var _b = 0, _c = type.types; _b < _c.length; _b++) {
+                        var t = _c[_b];
+                        if (t.flags & 16809468 /* DisjointDomains */) {
+                            constraints = ts.append(constraints, t);
+                        }
+                    }
+                }
+                return getIntersectionType(constraints);
+            }
+            return undefined;
+        }
+        function getBaseConstraintOfInstantiableNonPrimitiveUnionOrIntersection(type) {
+            if (type.flags & (14745600 /* InstantiableNonPrimitive */ | 786432 /* UnionOrIntersection */)) {
+                var constraint = getResolvedBaseConstraint(type);
+                if (constraint !== noConstraintType && constraint !== circularConstraintType) {
+                    return constraint;
+                }
+            }
+        }
+        function getBaseConstraintOfType(type) {
+            var constraint = getBaseConstraintOfInstantiableNonPrimitiveUnionOrIntersection(type);
+            if (!constraint && type.flags & 1048576 /* Index */) {
+                return keyofConstraintType;
+            }
+            return constraint;
+        }
+        /**
+         * This is similar to `getBaseConstraintOfType` except it returns the input type if there's no base constraint, instead of `undefined`
+         * It also doesn't map indexes to `string`, as where this is used this would be unneeded (and likely undesirable)
+         */
+        function getBaseConstraintOrType(type) {
+            return getBaseConstraintOfType(type) || type;
+        }
+        function hasNonCircularBaseConstraint(type) {
+            return getResolvedBaseConstraint(type) !== circularConstraintType;
+        }
+        /**
+         * Return the resolved base constraint of a type variable. The noConstraintType singleton is returned if the
+         * type variable has no constraint, and the circularConstraintType singleton is returned if the constraint
+         * circularly references the type variable.
+         */
+        function getResolvedBaseConstraint(type) {
+            var circular;
+            if (!type.resolvedBaseConstraint) {
+                var constraint = getBaseConstraint(type);
+                type.resolvedBaseConstraint = circular ? circularConstraintType : getTypeWithThisArgument(constraint || noConstraintType, type);
+            }
+            return type.resolvedBaseConstraint;
+            function getBaseConstraint(t) {
+                if (!pushTypeResolution(t, 4 /* ResolvedBaseConstraint */)) {
+                    circular = true;
+                    return undefined;
+                }
+                var result = computeBaseConstraint(getSimplifiedType(t));
+                if (!popTypeResolution()) {
+                    circular = true;
+                    return undefined;
+                }
+                return result;
+            }
+            function computeBaseConstraint(t) {
+                if (t.flags & 65536 /* TypeParameter */) {
+                    var constraint = getConstraintFromTypeParameter(t);
+                    return t.isThisType || !constraint ?
+                        constraint :
+                        getBaseConstraint(constraint);
+                }
+                if (t.flags & 786432 /* UnionOrIntersection */) {
+                    var types = t.types;
+                    var baseTypes = [];
+                    for (var _i = 0, types_4 = types; _i < types_4.length; _i++) {
+                        var type_3 = types_4[_i];
+                        var baseType = getBaseConstraint(type_3);
+                        if (baseType) {
+                            baseTypes.push(baseType);
+                        }
+                    }
+                    return t.flags & 262144 /* Union */ && baseTypes.length === types.length ? getUnionType(baseTypes) :
+                        t.flags & 524288 /* Intersection */ && baseTypes.length ? getIntersectionType(baseTypes) :
+                            undefined;
+                }
+                if (t.flags & 1048576 /* Index */) {
+                    return keyofConstraintType;
+                }
+                if (t.flags & 2097152 /* IndexedAccess */) {
+                    var baseObjectType = getBaseConstraint(t.objectType);
+                    var baseIndexType = getBaseConstraint(t.indexType);
+                    var baseIndexedAccess = baseObjectType && baseIndexType ? getIndexedAccessType(baseObjectType, baseIndexType) : undefined;
+                    return baseIndexedAccess && baseIndexedAccess !== errorType ? getBaseConstraint(baseIndexedAccess) : undefined;
+                }
+                if (t.flags & 4194304 /* Conditional */) {
+                    var constraint = getConstraintOfConditionalType(t);
+                    return constraint && getBaseConstraint(constraint);
+                }
+                if (t.flags & 8388608 /* Substitution */) {
+                    return getBaseConstraint(t.substitute);
+                }
+                if (isGenericMappedType(t)) {
+                    return emptyObjectType;
+                }
+                return t;
+            }
+        }
+        function getApparentTypeOfIntersectionType(type) {
+            return type.resolvedApparentType || (type.resolvedApparentType = getTypeWithThisArgument(type, type, /*apparentType*/ true));
+        }
+        function getResolvedTypeParameterDefault(typeParameter) {
+            if (!typeParameter.default) {
+                if (typeParameter.target) {
+                    var targetDefault = getResolvedTypeParameterDefault(typeParameter.target);
+                    typeParameter.default = targetDefault ? instantiateType(targetDefault, typeParameter.mapper) : noConstraintType;
+                }
+                else {
+                    // To block recursion, set the initial value to the resolvingDefaultType.
+                    typeParameter.default = resolvingDefaultType;
+                    var defaultDeclaration = typeParameter.symbol && ts.forEach(typeParameter.symbol.declarations, function (decl) { return ts.isTypeParameterDeclaration(decl) && decl.default; });
+                    var defaultType = defaultDeclaration ? getTypeFromTypeNode(defaultDeclaration) : noConstraintType;
+                    if (typeParameter.default === resolvingDefaultType) {
+                        // If we have not been called recursively, set the correct default type.
+                        typeParameter.default = defaultType;
+                    }
+                }
+            }
+            else if (typeParameter.default === resolvingDefaultType) {
+                // If we are called recursively for this type parameter, mark the default as circular.
+                typeParameter.default = circularConstraintType;
+            }
+            return typeParameter.default;
+        }
+        /**
+         * Gets the default type for a type parameter.
+         *
+         * If the type parameter is the result of an instantiation, this gets the instantiated
+         * default type of its target. If the type parameter has no default type or the default is
+         * circular, `undefined` is returned.
+         */
+        function getDefaultFromTypeParameter(typeParameter) {
+            var defaultType = getResolvedTypeParameterDefault(typeParameter);
+            return defaultType !== noConstraintType && defaultType !== circularConstraintType ? defaultType : undefined;
+        }
+        function hasNonCircularTypeParameterDefault(typeParameter) {
+            return getResolvedTypeParameterDefault(typeParameter) !== circularConstraintType;
+        }
+        /**
+         * Indicates whether the declaration of a typeParameter has a default type.
+         */
+        function hasTypeParameterDefault(typeParameter) {
+            return !!(typeParameter.symbol && ts.forEach(typeParameter.symbol.declarations, function (decl) { return ts.isTypeParameterDeclaration(decl) && decl.default; }));
+        }
+        /**
+         * For a type parameter, return the base constraint of the type parameter. For the string, number,
+         * boolean, and symbol primitive types, return the corresponding object types. Otherwise return the
+         * type itself. Note that the apparent type of a union type is the union type itself.
+         */
+        function getApparentType(type) {
+            var t = type.flags & 15794176 /* Instantiable */ ? getBaseConstraintOfType(type) || emptyObjectType : type;
+            return t.flags & 524288 /* Intersection */ ? getApparentTypeOfIntersectionType(t) :
+                t.flags & 68 /* StringLike */ ? globalStringType :
+                    t.flags & 168 /* NumberLike */ ? globalNumberType :
+                        t.flags & 272 /* BooleanLike */ ? globalBooleanType :
+                            t.flags & 3072 /* ESSymbolLike */ ? getGlobalESSymbolType(/*reportErrors*/ languageVersion >= 2 /* ES2015 */) :
+                                t.flags & 16777216 /* NonPrimitive */ ? emptyObjectType :
+                                    t.flags & 1048576 /* Index */ ? keyofConstraintType :
+                                        t;
+        }
+        function createUnionOrIntersectionProperty(containingType, name) {
+            var props;
+            var isUnion = containingType.flags & 262144 /* Union */;
+            var excludeModifiers = isUnion ? 24 /* NonPublicAccessibilityModifier */ : 0;
+            // Flags we want to propagate to the result if they exist in all source symbols
+            var commonFlags = isUnion ? 0 /* None */ : 16777216 /* Optional */;
+            var syntheticFlag = 4 /* SyntheticMethod */;
+            var checkFlags = 0;
+            for (var _i = 0, _a = containingType.types; _i < _a.length; _i++) {
+                var current = _a[_i];
+                var type = getApparentType(current);
+                if (type !== errorType) {
+                    var prop = getPropertyOfType(type, name);
+                    var modifiers = prop ? ts.getDeclarationModifierFlagsFromSymbol(prop) : 0;
+                    if (prop && !(modifiers & excludeModifiers)) {
+                        commonFlags &= prop.flags;
+                        props = ts.appendIfUnique(props, prop);
+                        checkFlags |= (isReadonlySymbol(prop) ? 8 /* Readonly */ : 0) |
+                            (!(modifiers & 24 /* NonPublicAccessibilityModifier */) ? 64 /* ContainsPublic */ : 0) |
+                            (modifiers & 16 /* Protected */ ? 128 /* ContainsProtected */ : 0) |
+                            (modifiers & 8 /* Private */ ? 256 /* ContainsPrivate */ : 0) |
+                            (modifiers & 32 /* Static */ ? 512 /* ContainsStatic */ : 0);
+                        if (!isPrototypeProperty(prop)) {
+                            syntheticFlag = 2 /* SyntheticProperty */;
+                        }
+                    }
+                    else if (isUnion) {
+                        checkFlags |= 16 /* Partial */;
+                    }
+                }
+            }
+            if (!props) {
+                return undefined;
+            }
+            if (props.length === 1 && !(checkFlags & 16 /* Partial */)) {
+                return props[0];
+            }
+            var declarations;
+            var commonType;
+            var nameType;
+            var propTypes = [];
+            var first = true;
+            var commonValueDeclaration;
+            var hasNonUniformValueDeclaration = false;
+            for (var _b = 0, props_1 = props; _b < props_1.length; _b++) {
+                var prop = props_1[_b];
+                if (!commonValueDeclaration) {
+                    commonValueDeclaration = prop.valueDeclaration;
+                }
+                else if (prop.valueDeclaration !== commonValueDeclaration) {
+                    hasNonUniformValueDeclaration = true;
+                }
+                declarations = ts.addRange(declarations, prop.declarations);
+                var type = getTypeOfSymbol(prop);
+                if (first) {
+                    commonType = type;
+                    nameType = prop.nameType;
+                    first = false;
+                }
+                else {
+                    if (type !== commonType) {
+                        checkFlags |= 32 /* HasNonUniformType */;
+                    }
+                }
+                propTypes.push(type);
+            }
+            var result = createSymbol(4 /* Property */ | commonFlags, name, syntheticFlag | checkFlags);
+            result.containingType = containingType;
+            if (!hasNonUniformValueDeclaration && commonValueDeclaration) {
+                result.valueDeclaration = commonValueDeclaration;
+            }
+            result.declarations = declarations;
+            result.nameType = nameType;
+            result.type = isUnion ? getUnionType(propTypes) : getIntersectionType(propTypes);
+            return result;
+        }
+        // Return the symbol for a given property in a union or intersection type, or undefined if the property
+        // does not exist in any constituent type. Note that the returned property may only be present in some
+        // constituents, in which case the isPartial flag is set when the containing type is union type. We need
+        // these partial properties when identifying discriminant properties, but otherwise they are filtered out
+        // and do not appear to be present in the union type.
+        function getUnionOrIntersectionProperty(type, name) {
+            var properties = type.propertyCache || (type.propertyCache = ts.createSymbolTable());
+            var property = properties.get(name);
+            if (!property) {
+                property = createUnionOrIntersectionProperty(type, name);
+                if (property) {
+                    properties.set(name, property);
+                }
+            }
+            return property;
+        }
+        function getPropertyOfUnionOrIntersectionType(type, name) {
+            var property = getUnionOrIntersectionProperty(type, name);
+            // We need to filter out partial properties in union types
+            return property && !(ts.getCheckFlags(property) & 16 /* Partial */) ? property : undefined;
+        }
+        /**
+         * Return the symbol for the property with the given name in the given type. Creates synthetic union properties when
+         * necessary, maps primitive types and type parameters are to their apparent types, and augments with properties from
+         * Object and Function as appropriate.
+         *
+         * @param type a type to look up property from
+         * @param name a name of property to look up in a given type
+         */
+        function getPropertyOfType(type, name) {
+            type = getApparentType(type);
+            if (type.flags & 131072 /* Object */) {
+                var resolved = resolveStructuredTypeMembers(type);
+                var symbol = resolved.members.get(name);
+                if (symbol && symbolIsValue(symbol)) {
+                    return symbol;
+                }
+                if (resolved === anyFunctionType || resolved.callSignatures.length || resolved.constructSignatures.length) {
+                    var symbol_1 = getPropertyOfObjectType(globalFunctionType, name);
+                    if (symbol_1) {
+                        return symbol_1;
+                    }
+                }
+                return getPropertyOfObjectType(globalObjectType, name);
+            }
+            if (type.flags & 786432 /* UnionOrIntersection */) {
+                return getPropertyOfUnionOrIntersectionType(type, name);
+            }
+            return undefined;
+        }
+        function getSignaturesOfStructuredType(type, kind) {
+            if (type.flags & 917504 /* StructuredType */) {
+                var resolved = resolveStructuredTypeMembers(type);
+                return kind === 0 /* Call */ ? resolved.callSignatures : resolved.constructSignatures;
+            }
+            return ts.emptyArray;
+        }
+        /**
+         * Return the signatures of the given kind in the given type. Creates synthetic union signatures when necessary and
+         * maps primitive types and type parameters are to their apparent types.
+         */
+        function getSignaturesOfType(type, kind) {
+            return getSignaturesOfStructuredType(getApparentType(type), kind);
+        }
+        function getIndexInfoOfStructuredType(type, kind) {
+            if (type.flags & 917504 /* StructuredType */) {
+                var resolved = resolveStructuredTypeMembers(type);
+                return kind === 0 /* String */ ? resolved.stringIndexInfo : resolved.numberIndexInfo;
+            }
+        }
+        function getIndexTypeOfStructuredType(type, kind) {
+            var info = getIndexInfoOfStructuredType(type, kind);
+            return info && info.type;
+        }
+        // Return the indexing info of the given kind in the given type. Creates synthetic union index types when necessary and
+        // maps primitive types and type parameters are to their apparent types.
+        function getIndexInfoOfType(type, kind) {
+            return getIndexInfoOfStructuredType(getApparentType(type), kind);
+        }
+        // Return the index type of the given kind in the given type. Creates synthetic union index types when necessary and
+        // maps primitive types and type parameters are to their apparent types.
+        function getIndexTypeOfType(type, kind) {
+            return getIndexTypeOfStructuredType(getApparentType(type), kind);
+        }
+        function getImplicitIndexTypeOfType(type, kind) {
+            if (isObjectTypeWithInferableIndex(type)) {
+                var propTypes = [];
+                for (var _i = 0, _a = getPropertiesOfType(type); _i < _a.length; _i++) {
+                    var prop = _a[_i];
+                    if (kind === 0 /* String */ || isNumericLiteralName(prop.escapedName)) {
+                        propTypes.push(getTypeOfSymbol(prop));
+                    }
+                }
+                if (propTypes.length) {
+                    return getUnionType(propTypes, 2 /* Subtype */);
+                }
+            }
+            return undefined;
+        }
+        // Return list of type parameters with duplicates removed (duplicate identifier errors are generated in the actual
+        // type checking functions).
+        function getTypeParametersFromDeclaration(declaration) {
+            var result;
+            for (var _i = 0, _a = ts.getEffectiveTypeParameterDeclarations(declaration); _i < _a.length; _i++) {
+                var node = _a[_i];
+                result = ts.appendIfUnique(result, getDeclaredTypeOfTypeParameter(node.symbol));
+            }
+            return result;
+        }
+        function symbolsToArray(symbols) {
+            var result = [];
+            symbols.forEach(function (symbol, id) {
+                if (!isReservedMemberName(id)) {
+                    result.push(symbol);
+                }
+            });
+            return result;
+        }
+        function isJSDocOptionalParameter(node) {
+            return ts.isInJavaScriptFile(node) && (
+            // node.type should only be a JSDocOptionalType when node is a parameter of a JSDocFunctionType
+            node.type && node.type.kind === 283 /* JSDocOptionalType */
+                || ts.getJSDocParameterTags(node).some(function (_a) {
+                    var isBracketed = _a.isBracketed, typeExpression = _a.typeExpression;
+                    return isBracketed || !!typeExpression && typeExpression.type.kind === 283 /* JSDocOptionalType */;
+                }));
+        }
+        function tryFindAmbientModule(moduleName, withAugmentations) {
+            if (ts.isExternalModuleNameRelative(moduleName)) {
+                return undefined;
+            }
+            var symbol = getSymbol(globals, '"' + moduleName + '"', 512 /* ValueModule */);
+            // merged symbol is module declaration symbol combined with all augmentations
+            return symbol && withAugmentations ? getMergedSymbol(symbol) : symbol;
+        }
+        function isOptionalParameter(node) {
+            if (ts.hasQuestionToken(node) || isOptionalJSDocParameterTag(node) || isJSDocOptionalParameter(node)) {
+                return true;
+            }
+            if (node.initializer) {
+                var signature = getSignatureFromDeclaration(node.parent);
+                var parameterIndex = node.parent.parameters.indexOf(node);
+                ts.Debug.assert(parameterIndex >= 0);
+                return parameterIndex >= signature.minArgumentCount;
+            }
+            var iife = ts.getImmediatelyInvokedFunctionExpression(node.parent);
+            if (iife) {
+                return !node.type &&
+                    !node.dotDotDotToken &&
+                    node.parent.parameters.indexOf(node) >= iife.arguments.length;
+            }
+            return false;
+        }
+        function isOptionalJSDocParameterTag(node) {
+            if (!ts.isJSDocParameterTag(node)) {
+                return false;
+            }
+            var isBracketed = node.isBracketed, typeExpression = node.typeExpression;
+            return isBracketed || !!typeExpression && typeExpression.type.kind === 283 /* JSDocOptionalType */;
+        }
+        function createTypePredicateFromTypePredicateNode(node) {
+            var parameterName = node.parameterName;
+            var type = getTypeFromTypeNode(node.type);
+            if (parameterName.kind === 71 /* Identifier */) {
+                return createIdentifierTypePredicate(parameterName && parameterName.escapedText, // TODO: GH#18217
+                parameterName && getTypePredicateParameterIndex(node.parent.parameters, parameterName), type);
+            }
+            else {
+                return createThisTypePredicate(type);
+            }
+        }
+        function createIdentifierTypePredicate(parameterName, parameterIndex, type) {
+            return { kind: 1 /* Identifier */, parameterName: parameterName, parameterIndex: parameterIndex, type: type };
+        }
+        function createThisTypePredicate(type) {
+            return { kind: 0 /* This */, type: type };
+        }
+        /**
+         * Gets the minimum number of type arguments needed to satisfy all non-optional type
+         * parameters.
+         */
+        function getMinTypeArgumentCount(typeParameters) {
+            var minTypeArgumentCount = 0;
+            if (typeParameters) {
+                for (var i = 0; i < typeParameters.length; i++) {
+                    if (!hasTypeParameterDefault(typeParameters[i])) {
+                        minTypeArgumentCount = i + 1;
+                    }
+                }
+            }
+            return minTypeArgumentCount;
+        }
+        function fillMissingTypeArguments(typeArguments, typeParameters, minTypeArgumentCount, isJavaScriptImplicitAny) {
+            var numTypeParameters = ts.length(typeParameters);
+            if (numTypeParameters) {
+                var numTypeArguments = ts.length(typeArguments);
+                if (isJavaScriptImplicitAny || (numTypeArguments >= minTypeArgumentCount && numTypeArguments <= numTypeParameters)) {
+                    if (!typeArguments) {
+                        typeArguments = [];
+                    }
+                    // Map an unsatisfied type parameter with a default type.
+                    // If a type parameter does not have a default type, or if the default type
+                    // is a forward reference, the empty object type is used.
+                    for (var i = numTypeArguments; i < numTypeParameters; i++) {
+                        typeArguments[i] = getDefaultTypeArgumentType(isJavaScriptImplicitAny);
+                    }
+                    for (var i = numTypeArguments; i < numTypeParameters; i++) {
+                        var mapper = createTypeMapper(typeParameters, typeArguments);
+                        var defaultType = getDefaultFromTypeParameter(typeParameters[i]);
+                        if (isJavaScriptImplicitAny && defaultType && isTypeIdenticalTo(defaultType, emptyObjectType)) {
+                            defaultType = anyType;
+                        }
+                        typeArguments[i] = defaultType ? instantiateType(defaultType, mapper) : getDefaultTypeArgumentType(isJavaScriptImplicitAny);
+                    }
+                    typeArguments.length = typeParameters.length;
+                }
+            }
+            return typeArguments;
+        }
+        function getSignatureFromDeclaration(declaration) {
+            var links = getNodeLinks(declaration);
+            if (!links.resolvedSignature) {
+                var parameters = [];
+                var hasLiteralTypes = false;
+                var minArgumentCount = 0;
+                var thisParameter = void 0;
+                var hasThisParameter = false;
+                var iife = ts.getImmediatelyInvokedFunctionExpression(declaration);
+                var isJSConstructSignature = ts.isJSDocConstructSignature(declaration);
+                var isUntypedSignatureInJSFile = !iife &&
+                    ts.isInJavaScriptFile(declaration) &&
+                    ts.isValueSignatureDeclaration(declaration) &&
+                    !ts.hasJSDocParameterTags(declaration) &&
+                    !ts.getJSDocType(declaration);
+                // If this is a JSDoc construct signature, then skip the first parameter in the
+                // parameter list.  The first parameter represents the return type of the construct
+                // signature.
+                for (var i = isJSConstructSignature ? 1 : 0; i < declaration.parameters.length; i++) {
+                    var param = declaration.parameters[i];
+                    var paramSymbol = param.symbol;
+                    var type = ts.isJSDocParameterTag(param) ? (param.typeExpression && param.typeExpression.type) : param.type;
+                    // Include parameter symbol instead of property symbol in the signature
+                    if (paramSymbol && !!(paramSymbol.flags & 4 /* Property */) && !ts.isBindingPattern(param.name)) {
+                        var resolvedSymbol = resolveName(param, paramSymbol.escapedName, 67216319 /* Value */, undefined, undefined, /*isUse*/ false);
+                        paramSymbol = resolvedSymbol;
+                    }
+                    if (i === 0 && paramSymbol.escapedName === "this") {
+                        hasThisParameter = true;
+                        thisParameter = param.symbol;
+                    }
+                    else {
+                        parameters.push(paramSymbol);
+                    }
+                    if (type && type.kind === 178 /* LiteralType */) {
+                        hasLiteralTypes = true;
+                    }
+                    // Record a new minimum argument count if this is not an optional parameter
+                    var isOptionalParameter_1 = isOptionalJSDocParameterTag(param) ||
+                        param.initializer || param.questionToken || param.dotDotDotToken ||
+                        iife && parameters.length > iife.arguments.length && !type ||
+                        isUntypedSignatureInJSFile ||
+                        isJSDocOptionalParameter(param);
+                    if (!isOptionalParameter_1) {
+                        minArgumentCount = parameters.length;
+                    }
+                }
+                // If only one accessor includes a this-type annotation, the other behaves as if it had the same type annotation
+                if ((declaration.kind === 156 /* GetAccessor */ || declaration.kind === 157 /* SetAccessor */) &&
+                    !hasNonBindableDynamicName(declaration) &&
+                    (!hasThisParameter || !thisParameter)) {
+                    var otherKind = declaration.kind === 156 /* GetAccessor */ ? 157 /* SetAccessor */ : 156 /* GetAccessor */;
+                    var other = ts.getDeclarationOfKind(getSymbolOfNode(declaration), otherKind);
+                    if (other) {
+                        thisParameter = getAnnotatedAccessorThisParameter(other);
+                    }
+                }
+                var classType = declaration.kind === 155 /* Constructor */ ?
+                    getDeclaredTypeOfClassOrInterface(getMergedSymbol(declaration.parent.symbol))
+                    : undefined;
+                var typeParameters = classType ? classType.localTypeParameters : getTypeParametersFromDeclaration(declaration);
+                var returnType = getSignatureReturnTypeFromDeclaration(declaration, isJSConstructSignature, classType);
+                var hasRestLikeParameter = ts.hasRestParameter(declaration) || ts.isInJavaScriptFile(declaration) && maybeAddJsSyntheticRestParameter(declaration, parameters);
+                links.resolvedSignature = createSignature(declaration, typeParameters, thisParameter, parameters, returnType, /*resolvedTypePredicate*/ undefined, minArgumentCount, hasRestLikeParameter, hasLiteralTypes);
+            }
+            return links.resolvedSignature;
+        }
+        /**
+         * A JS function gets a synthetic rest parameter if it references `arguments` AND:
+         * 1. It has no parameters but at least one `@param` with a type that starts with `...`
+         * OR
+         * 2. It has at least one parameter, and the last parameter has a matching `@param` with a type that starts with `...`
+         */
+        function maybeAddJsSyntheticRestParameter(declaration, parameters) {
+            if (ts.isJSDocSignature(declaration) || !containsArgumentsReference(declaration)) {
+                return false;
+            }
+            var lastParam = ts.lastOrUndefined(declaration.parameters);
+            var lastParamTags = lastParam ? ts.getJSDocParameterTags(lastParam) : ts.getJSDocTags(declaration).filter(ts.isJSDocParameterTag);
+            var lastParamVariadicType = ts.firstDefined(lastParamTags, function (p) {
+                return p.typeExpression && ts.isJSDocVariadicType(p.typeExpression.type) ? p.typeExpression.type : undefined;
+            });
+            var syntheticArgsSymbol = createSymbol(3 /* Variable */, "args");
+            syntheticArgsSymbol.type = lastParamVariadicType ? createArrayType(getTypeFromTypeNode(lastParamVariadicType.type)) : anyArrayType;
+            syntheticArgsSymbol.isRestParameter = true;
+            if (lastParamVariadicType) {
+                // Replace the last parameter with a rest parameter.
+                parameters.pop();
+            }
+            parameters.push(syntheticArgsSymbol);
+            return true;
+        }
+        function getSignatureReturnTypeFromDeclaration(declaration, isJSConstructSignature, classType) {
+            if (isJSConstructSignature) {
+                return getTypeFromTypeNode(declaration.parameters[0].type); // TODO: GH#18217
+            }
+            else if (classType) {
+                return classType;
+            }
+            var typeNode = ts.getEffectiveReturnTypeNode(declaration);
+            if (typeNode) {
+                return getTypeFromTypeNode(typeNode);
+            }
+            // TypeScript 1.0 spec (April 2014):
+            // If only one accessor includes a type annotation, the other behaves as if it had the same type annotation.
+            if (declaration.kind === 156 /* GetAccessor */ && !hasNonBindableDynamicName(declaration)) {
+                var setter = ts.getDeclarationOfKind(getSymbolOfNode(declaration), 157 /* SetAccessor */);
+                return getAnnotatedAccessorType(setter);
+            }
+            if (ts.nodeIsMissing(declaration.body)) {
+                return anyType;
+            }
+        }
+        function containsArgumentsReference(declaration) {
+            var links = getNodeLinks(declaration);
+            if (links.containsArgumentsReference === undefined) {
+                if (links.flags & 8192 /* CaptureArguments */) {
+                    links.containsArgumentsReference = true;
+                }
+                else {
+                    links.containsArgumentsReference = traverse(declaration.body);
+                }
+            }
+            return links.containsArgumentsReference;
+            function traverse(node) {
+                if (!node)
+                    return false;
+                switch (node.kind) {
+                    case 71 /* Identifier */:
+                        return node.escapedText === "arguments" && ts.isExpressionNode(node);
+                    case 152 /* PropertyDeclaration */:
+                    case 154 /* MethodDeclaration */:
+                    case 156 /* GetAccessor */:
+                    case 157 /* SetAccessor */:
+                        return node.name.kind === 147 /* ComputedPropertyName */
+                            && traverse(node.name);
+                    default:
+                        return !ts.nodeStartsNewLexicalEnvironment(node) && !ts.isPartOfTypeNode(node) && !!ts.forEachChild(node, traverse);
+                }
+            }
+        }
+        function getSignaturesOfSymbol(symbol) {
+            if (!symbol)
+                return ts.emptyArray;
+            var result = [];
+            for (var i = 0; i < symbol.declarations.length; i++) {
+                var decl = symbol.declarations[i];
+                if (!ts.isFunctionLike(decl))
+                    continue;
+                // Don't include signature if node is the implementation of an overloaded function. A node is considered
+                // an implementation node if it has a body and the previous node is of the same kind and immediately
+                // precedes the implementation node (i.e. has the same parent and ends where the implementation starts).
+                if (i > 0 && decl.body) {
+                    var previous = symbol.declarations[i - 1];
+                    if (decl.parent === previous.parent && decl.kind === previous.kind && decl.pos === previous.end) {
+                        continue;
+                    }
+                }
+                result.push(getSignatureFromDeclaration(decl));
+            }
+            return result;
+        }
+        function resolveExternalModuleTypeByLiteral(name) {
+            var moduleSym = resolveExternalModuleName(name, name);
+            if (moduleSym) {
+                var resolvedModuleSymbol = resolveExternalModuleSymbol(moduleSym);
+                if (resolvedModuleSymbol) {
+                    return getTypeOfSymbol(resolvedModuleSymbol);
+                }
+            }
+            return anyType;
+        }
+        function getThisTypeOfSignature(signature) {
+            if (signature.thisParameter) {
+                return getTypeOfSymbol(signature.thisParameter);
+            }
+        }
+        function signatureHasTypePredicate(signature) {
+            return getTypePredicateOfSignature(signature) !== undefined;
+        }
+        function getTypePredicateOfSignature(signature) {
+            if (!signature.resolvedTypePredicate) {
+                if (signature.target) {
+                    var targetTypePredicate = getTypePredicateOfSignature(signature.target);
+                    signature.resolvedTypePredicate = targetTypePredicate ? instantiateTypePredicate(targetTypePredicate, signature.mapper) : noTypePredicate;
+                }
+                else if (signature.unionSignatures) {
+                    signature.resolvedTypePredicate = getUnionTypePredicate(signature.unionSignatures) || noTypePredicate;
+                }
+                else {
+                    var declaration = signature.declaration;
+                    signature.resolvedTypePredicate = declaration && declaration.type && declaration.type.kind === 161 /* TypePredicate */ ?
+                        createTypePredicateFromTypePredicateNode(declaration.type) :
+                        noTypePredicate;
+                }
+                ts.Debug.assert(!!signature.resolvedTypePredicate);
+            }
+            return signature.resolvedTypePredicate === noTypePredicate ? undefined : signature.resolvedTypePredicate;
+        }
+        function getReturnTypeOfSignature(signature) {
+            if (!signature.resolvedReturnType) {
+                if (!pushTypeResolution(signature, 3 /* ResolvedReturnType */)) {
+                    return errorType;
+                }
+                var type = void 0;
+                if (signature.target) {
+                    type = instantiateType(getReturnTypeOfSignature(signature.target), signature.mapper);
+                }
+                else if (signature.unionSignatures) {
+                    type = getUnionType(ts.map(signature.unionSignatures, getReturnTypeOfSignature), 2 /* Subtype */);
+                }
+                else {
+                    type = getReturnTypeFromBody(signature.declaration);
+                }
+                if (!popTypeResolution()) {
+                    type = anyType;
+                    if (noImplicitAny) {
+                        var declaration = signature.declaration;
+                        var name = ts.getNameOfDeclaration(declaration);
+                        if (name) {
+                            error(name, ts.Diagnostics._0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions, ts.declarationNameToString(name));
+                        }
+                        else {
+                            error(declaration, ts.Diagnostics.Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions);
+                        }
+                    }
+                }
+                signature.resolvedReturnType = type;
+            }
+            return signature.resolvedReturnType;
+        }
+        function isResolvingReturnTypeOfSignature(signature) {
+            return !signature.resolvedReturnType && findResolutionCycleStartIndex(signature, 3 /* ResolvedReturnType */) >= 0;
+        }
+        function getRestTypeOfSignature(signature) {
+            if (signature.hasRestParameter) {
+                var type = getTypeOfSymbol(ts.last(signature.parameters));
+                if (ts.getObjectFlags(type) & 4 /* Reference */ && type.target === globalArrayType) {
+                    return type.typeArguments[0];
+                }
+            }
+            return anyType;
+        }
+        function getSignatureInstantiation(signature, typeArguments, isJavascript) {
+            typeArguments = fillMissingTypeArguments(typeArguments, signature.typeParameters, getMinTypeArgumentCount(signature.typeParameters), isJavascript);
+            var instantiations = signature.instantiations || (signature.instantiations = ts.createMap());
+            var id = getTypeListId(typeArguments);
+            var instantiation = instantiations.get(id);
+            if (!instantiation) {
+                instantiations.set(id, instantiation = createSignatureInstantiation(signature, typeArguments));
+            }
+            return instantiation;
+        }
+        function createSignatureInstantiation(signature, typeArguments) {
+            return instantiateSignature(signature, createSignatureTypeMapper(signature, typeArguments), /*eraseTypeParameters*/ true);
+        }
+        function createSignatureTypeMapper(signature, typeArguments) {
+            return createTypeMapper(signature.typeParameters, typeArguments);
+        }
+        function getErasedSignature(signature) {
+            return signature.typeParameters ?
+                signature.erasedSignatureCache || (signature.erasedSignatureCache = createErasedSignature(signature)) :
+                signature;
+        }
+        function createErasedSignature(signature) {
+            // Create an instantiation of the signature where all type arguments are the any type.
+            return instantiateSignature(signature, createTypeEraser(signature.typeParameters), /*eraseTypeParameters*/ true);
+        }
+        function getCanonicalSignature(signature) {
+            return signature.typeParameters ?
+                signature.canonicalSignatureCache || (signature.canonicalSignatureCache = createCanonicalSignature(signature)) :
+                signature;
+        }
+        function createCanonicalSignature(signature) {
+            // Create an instantiation of the signature where each unconstrained type parameter is replaced with
+            // its original. When a generic class or interface is instantiated, each generic method in the class or
+            // interface is instantiated with a fresh set of cloned type parameters (which we need to handle scenarios
+            // where different generations of the same type parameter are in scope). This leads to a lot of new type
+            // identities, and potentially a lot of work comparing those identities, so here we create an instantiation
+            // that uses the original type identities for all unconstrained type parameters.
+            return getSignatureInstantiation(signature, ts.map(signature.typeParameters, function (tp) { return tp.target && !getConstraintOfTypeParameter(tp.target) ? tp.target : tp; }), ts.isInJavaScriptFile(signature.declaration));
+        }
+        function getBaseSignature(signature) {
+            var typeParameters = signature.typeParameters;
+            if (typeParameters) {
+                var typeEraser_1 = createTypeEraser(typeParameters);
+                var baseConstraints = ts.map(typeParameters, function (tp) { return instantiateType(getBaseConstraintOfType(tp), typeEraser_1) || emptyObjectType; });
+                return instantiateSignature(signature, createTypeMapper(typeParameters, baseConstraints), /*eraseTypeParameters*/ true);
+            }
+            return signature;
+        }
+        function getOrCreateTypeFromSignature(signature) {
+            // There are two ways to declare a construct signature, one is by declaring a class constructor
+            // using the constructor keyword, and the other is declaring a bare construct signature in an
+            // object type literal or interface (using the new keyword). Each way of declaring a constructor
+            // will result in a different declaration kind.
+            if (!signature.isolatedSignatureType) {
+                var isConstructor = signature.declaration.kind === 155 /* Constructor */ || signature.declaration.kind === 159 /* ConstructSignature */; // TODO: GH#18217
+                var type = createObjectType(16 /* Anonymous */);
+                type.members = emptySymbols;
+                type.properties = ts.emptyArray;
+                type.callSignatures = !isConstructor ? [signature] : ts.emptyArray;
+                type.constructSignatures = isConstructor ? [signature] : ts.emptyArray;
+                signature.isolatedSignatureType = type;
+            }
+            return signature.isolatedSignatureType;
+        }
+        function getIndexSymbol(symbol) {
+            return symbol.members.get("__index" /* Index */);
+        }
+        function getIndexDeclarationOfSymbol(symbol, kind) {
+            var syntaxKind = kind === 1 /* Number */ ? 134 /* NumberKeyword */ : 137 /* StringKeyword */;
+            var indexSymbol = getIndexSymbol(symbol);
+            if (indexSymbol) {
+                for (var _i = 0, _a = indexSymbol.declarations; _i < _a.length; _i++) {
+                    var decl = _a[_i];
+                    var node = ts.cast(decl, ts.isIndexSignatureDeclaration);
+                    if (node.parameters.length === 1) {
+                        var parameter = node.parameters[0];
+                        if (parameter.type && parameter.type.kind === syntaxKind) {
+                            return node;
+                        }
+                    }
+                }
+            }
+            return undefined;
+        }
+        function createIndexInfo(type, isReadonly, declaration) {
+            return { type: type, isReadonly: isReadonly, declaration: declaration };
+        }
+        function getIndexInfoOfSymbol(symbol, kind) {
+            var declaration = getIndexDeclarationOfSymbol(symbol, kind);
+            if (declaration) {
+                return createIndexInfo(declaration.type ? getTypeFromTypeNode(declaration.type) : anyType, ts.hasModifier(declaration, 64 /* Readonly */), declaration);
+            }
+            return undefined;
+        }
+        function getConstraintDeclaration(type) {
+            var decl = type.symbol && ts.getDeclarationOfKind(type.symbol, 148 /* TypeParameter */);
+            return decl && decl.constraint;
+        }
+        function getInferredTypeParameterConstraint(typeParameter) {
+            var inferences;
+            if (typeParameter.symbol) {
+                for (var _i = 0, _a = typeParameter.symbol.declarations; _i < _a.length; _i++) {
+                    var declaration = _a[_i];
+                    // When an 'infer T' declaration is immediately contained in a type reference node
+                    // (such as 'Foo<infer T>'), T's constraint is inferred from the constraint of the
+                    // corresponding type parameter in 'Foo'. When multiple 'infer T' declarations are
+                    // present, we form an intersection of the inferred constraint types.
+                    if (declaration.parent.kind === 172 /* InferType */ && declaration.parent.parent.kind === 162 /* TypeReference */) {
+                        var typeReference = declaration.parent.parent;
+                        var typeParameters = getTypeParametersForTypeReference(typeReference);
+                        if (typeParameters) {
+                            var index = typeReference.typeArguments.indexOf(declaration.parent);
+                            if (index < typeParameters.length) {
+                                var declaredConstraint = getConstraintOfTypeParameter(typeParameters[index]);
+                                if (declaredConstraint) {
+                                    // Type parameter constraints can reference other type parameters so
+                                    // constraints need to be instantiated. If instantiation produces the
+                                    // type parameter itself, we discard that inference. For example, in
+                                    //   type Foo<T extends string, U extends T> = [T, U];
+                                    //   type Bar<T> = T extends Foo<infer X, infer X> ? Foo<X, X> : T;
+                                    // the instantiated constraint for U is X, so we discard that inference.
+                                    var mapper = createTypeMapper(typeParameters, getEffectiveTypeArguments(typeReference, typeParameters));
+                                    var constraint = instantiateType(declaredConstraint, mapper);
+                                    if (constraint !== typeParameter) {
+                                        inferences = ts.append(inferences, constraint);
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+            return inferences && getIntersectionType(inferences);
+        }
+        function getConstraintFromTypeParameter(typeParameter) {
+            if (!typeParameter.constraint) {
+                if (typeParameter.target) {
+                    var targetConstraint = getConstraintOfTypeParameter(typeParameter.target);
+                    typeParameter.constraint = targetConstraint ? instantiateType(targetConstraint, typeParameter.mapper) : noConstraintType;
+                }
+                else {
+                    var constraintDeclaration = getConstraintDeclaration(typeParameter);
+                    typeParameter.constraint = constraintDeclaration ? getTypeFromTypeNode(constraintDeclaration) :
+                        getInferredTypeParameterConstraint(typeParameter) || noConstraintType;
+                }
+            }
+            return typeParameter.constraint === noConstraintType ? undefined : typeParameter.constraint;
+        }
+        function getParentSymbolOfTypeParameter(typeParameter) {
+            return getSymbolOfNode(ts.getDeclarationOfKind(typeParameter.symbol, 148 /* TypeParameter */).parent);
+        }
+        function getTypeListId(types) {
+            var result = "";
+            if (types) {
+                var length_3 = types.length;
+                var i = 0;
+                while (i < length_3) {
+                    var startId = types[i].id;
+                    var count = 1;
+                    while (i + count < length_3 && types[i + count].id === startId + count) {
+                        count++;
+                    }
+                    if (result.length) {
+                        result += ",";
+                    }
+                    result += startId;
+                    if (count > 1) {
+                        result += ":" + count;
+                    }
+                    i += count;
+                }
+            }
+            return result;
+        }
+        // This function is used to propagate certain flags when creating new object type references and union types.
+        // It is only necessary to do so if a constituent type might be the undefined type, the null type, the type
+        // of an object literal or the anyFunctionType. This is because there are operations in the type checker
+        // that care about the presence of such types at arbitrary depth in a containing type.
+        function getPropagatingFlagsOfTypes(types, excludeKinds) {
+            var result = 0;
+            for (var _i = 0, types_5 = types; _i < types_5.length; _i++) {
+                var type = types_5[_i];
+                if (!(type.flags & excludeKinds)) {
+                    result |= type.flags;
+                }
+            }
+            return result & 939524096 /* PropagatingFlags */;
+        }
+        function createTypeReference(target, typeArguments) {
+            var id = getTypeListId(typeArguments);
+            var type = target.instantiations.get(id);
+            if (!type) {
+                type = createObjectType(4 /* Reference */, target.symbol);
+                target.instantiations.set(id, type);
+                type.flags |= typeArguments ? getPropagatingFlagsOfTypes(typeArguments, /*excludeKinds*/ 0) : 0;
+                type.target = target;
+                type.typeArguments = typeArguments;
+            }
+            return type;
+        }
+        function cloneTypeReference(source) {
+            var type = createType(source.flags);
+            type.symbol = source.symbol;
+            type.objectFlags = source.objectFlags;
+            type.target = source.target;
+            type.typeArguments = source.typeArguments;
+            return type;
+        }
+        function getTypeReferenceArity(type) {
+            return ts.length(type.target.typeParameters);
+        }
+        /**
+         * Get type from type-reference that reference to class or interface
+         */
+        function getTypeFromClassOrInterfaceReference(node, symbol, typeArgs) {
+            var type = getDeclaredTypeOfSymbol(getMergedSymbol(symbol));
+            var typeParameters = type.localTypeParameters;
+            if (typeParameters) {
+                var numTypeArguments = ts.length(node.typeArguments);
+                var minTypeArgumentCount = getMinTypeArgumentCount(typeParameters);
+                var isJs = ts.isInJavaScriptFile(node);
+                var isJsImplicitAny = !noImplicitAny && isJs;
+                if (!isJsImplicitAny && (numTypeArguments < minTypeArgumentCount || numTypeArguments > typeParameters.length)) {
+                    var missingAugmentsTag = isJs && node.parent.kind !== 290 /* JSDocAugmentsTag */;
+                    var diag = minTypeArgumentCount === typeParameters.length
+                        ? missingAugmentsTag
+                            ? ts.Diagnostics.Expected_0_type_arguments_provide_these_with_an_extends_tag
+                            : ts.Diagnostics.Generic_type_0_requires_1_type_argument_s
+                        : missingAugmentsTag
+                            ? ts.Diagnostics.Expected_0_1_type_arguments_provide_these_with_an_extends_tag
+                            : ts.Diagnostics.Generic_type_0_requires_between_1_and_2_type_arguments;
+                    var typeStr = typeToString(type, /*enclosingDeclaration*/ undefined, 2 /* WriteArrayAsGenericType */);
+                    error(node, diag, typeStr, minTypeArgumentCount, typeParameters.length);
+                    if (!isJs) {
+                        // TODO: Adopt same permissive behavior in TS as in JS to reduce follow-on editing experience failures (requires editing fillMissingTypeArguments)
+                        return errorType;
+                    }
+                }
+                // In a type reference, the outer type parameters of the referenced class or interface are automatically
+                // supplied as type arguments and the type reference only specifies arguments for the local type parameters
+                // of the class or interface.
+                var typeArguments = ts.concatenate(type.outerTypeParameters, fillMissingTypeArguments(typeArgs, typeParameters, minTypeArgumentCount, isJs));
+                return createTypeReference(type, typeArguments);
+            }
+            return checkNoTypeArguments(node, symbol) ? type : errorType;
+        }
+        function getTypeAliasInstantiation(symbol, typeArguments) {
+            var type = getDeclaredTypeOfSymbol(symbol);
+            var links = getSymbolLinks(symbol);
+            var typeParameters = links.typeParameters;
+            var id = getTypeListId(typeArguments);
+            var instantiation = links.instantiations.get(id);
+            if (!instantiation) {
+                links.instantiations.set(id, instantiation = instantiateType(type, createTypeMapper(typeParameters, fillMissingTypeArguments(typeArguments, typeParameters, getMinTypeArgumentCount(typeParameters), ts.isInJavaScriptFile(symbol.valueDeclaration)))));
+            }
+            return instantiation;
+        }
+        /**
+         * Get type from reference to type alias. When a type alias is generic, the declared type of the type alias may include
+         * references to the type parameters of the alias. We replace those with the actual type arguments by instantiating the
+         * declared type. Instantiations are cached using the type identities of the type arguments as the key.
+         */
+        function getTypeFromTypeAliasReference(node, symbol, typeArguments) {
+            var type = getDeclaredTypeOfSymbol(symbol);
+            var typeParameters = getSymbolLinks(symbol).typeParameters;
+            if (typeParameters) {
+                var numTypeArguments = ts.length(node.typeArguments);
+                var minTypeArgumentCount = getMinTypeArgumentCount(typeParameters);
+                if (numTypeArguments < minTypeArgumentCount || numTypeArguments > typeParameters.length) {
+                    error(node, minTypeArgumentCount === typeParameters.length
+                        ? ts.Diagnostics.Generic_type_0_requires_1_type_argument_s
+                        : ts.Diagnostics.Generic_type_0_requires_between_1_and_2_type_arguments, symbolToString(symbol), minTypeArgumentCount, typeParameters.length);
+                    return errorType;
+                }
+                return getTypeAliasInstantiation(symbol, typeArguments);
+            }
+            return checkNoTypeArguments(node, symbol) ? type : errorType;
+        }
+        function getTypeReferenceName(node) {
+            switch (node.kind) {
+                case 162 /* TypeReference */:
+                    return node.typeName;
+                case 207 /* ExpressionWithTypeArguments */:
+                    // We only support expressions that are simple qualified names. For other
+                    // expressions this produces undefined.
+                    var expr = node.expression;
+                    if (ts.isEntityNameExpression(expr)) {
+                        return expr;
+                    }
+                // fall through;
+            }
+            return undefined;
+        }
+        function resolveTypeReferenceName(typeReferenceName, meaning) {
+            if (!typeReferenceName) {
+                return unknownSymbol;
+            }
+            return resolveEntityName(typeReferenceName, meaning) || unknownSymbol;
+        }
+        function getTypeReferenceType(node, symbol) {
+            var typeArguments = typeArgumentsFromTypeReferenceNode(node); // Do unconditionally so we mark type arguments as referenced.
+            if (symbol === unknownSymbol) {
+                return errorType;
+            }
+            var type = getTypeReferenceTypeWorker(node, symbol, typeArguments);
+            if (type) {
+                return type;
+            }
+            // Get type from reference to named type that cannot be generic (enum or type parameter)
+            var res = tryGetDeclaredTypeOfSymbol(symbol);
+            if (res) {
+                return checkNoTypeArguments(node, symbol) ?
+                    res.flags & 65536 /* TypeParameter */ ? getConstrainedTypeVariable(res, node) : res :
+                    errorType;
+            }
+            if (!(symbol.flags & 67216319 /* Value */ && isJSDocTypeReference(node))) {
+                return errorType;
+            }
+            var jsdocType = getJSDocTypeReference(node, symbol, typeArguments);
+            if (jsdocType) {
+                return jsdocType;
+            }
+            // Resolve the type reference as a Type for the purpose of reporting errors.
+            resolveTypeReferenceName(getTypeReferenceName(node), 67901928 /* Type */);
+            return getTypeOfSymbol(symbol);
+        }
+        /**
+         * A jsdoc TypeReference may have resolved to a value (as opposed to a type). If
+         * the symbol is a constructor function, return the inferred class type; otherwise,
+         * the type of this reference is just the type of the value we resolved to.
+         */
+        function getJSDocTypeReference(node, symbol, typeArguments) {
+            var assignedType = getAssignedClassType(symbol);
+            var valueType = getTypeOfSymbol(symbol);
+            var referenceType = valueType.symbol && valueType.symbol !== symbol && !isInferredClassType(valueType) && getTypeReferenceTypeWorker(node, valueType.symbol, typeArguments);
+            if (referenceType || assignedType) {
+                // TODO: GH#18217 (should the `|| assignedType` be at a lower precedence?)
+                return (referenceType && assignedType ? getIntersectionType([assignedType, referenceType]) : referenceType || assignedType);
+            }
+        }
+        function getTypeReferenceTypeWorker(node, symbol, typeArguments) {
+            if (symbol.flags & (32 /* Class */ | 64 /* Interface */)) {
+                if (symbol.valueDeclaration && ts.isBinaryExpression(symbol.valueDeclaration.parent)) {
+                    var jsdocType = getJSDocTypeReference(node, symbol, typeArguments);
+                    if (jsdocType) {
+                        return jsdocType;
+                    }
+                }
+                return getTypeFromClassOrInterfaceReference(node, symbol, typeArguments);
+            }
+            if (symbol.flags & 524288 /* TypeAlias */) {
+                return getTypeFromTypeAliasReference(node, symbol, typeArguments);
+            }
+            if (symbol.flags & 16 /* Function */ &&
+                isJSDocTypeReference(node) &&
+                (symbol.members || ts.getJSDocClassTag(symbol.valueDeclaration))) {
+                return getInferredClassType(symbol);
+            }
+        }
+        function getSubstitutionType(typeVariable, substitute) {
+            var result = createType(8388608 /* Substitution */);
+            result.typeVariable = typeVariable;
+            result.substitute = substitute;
+            return result;
+        }
+        function isUnaryTupleTypeNode(node) {
+            return node.kind === 168 /* TupleType */ && node.elementTypes.length === 1;
+        }
+        function getImpliedConstraint(typeVariable, checkNode, extendsNode) {
+            return isUnaryTupleTypeNode(checkNode) && isUnaryTupleTypeNode(extendsNode) ? getImpliedConstraint(typeVariable, checkNode.elementTypes[0], extendsNode.elementTypes[0]) :
+                getActualTypeVariable(getTypeFromTypeNode(checkNode)) === typeVariable ? getTypeFromTypeNode(extendsNode) :
+                    undefined;
+        }
+        function getConstrainedTypeVariable(typeVariable, node) {
+            var constraints;
+            while (node && !ts.isStatement(node) && node.kind !== 286 /* JSDocComment */) {
+                var parent = node.parent;
+                if (parent.kind === 171 /* ConditionalType */ && node === parent.trueType) {
+                    var constraint = getImpliedConstraint(typeVariable, parent.checkType, parent.extendsType);
+                    if (constraint) {
+                        constraints = ts.append(constraints, constraint);
+                    }
+                }
+                node = parent;
+            }
+            return constraints ? getSubstitutionType(typeVariable, getIntersectionType(ts.append(constraints, typeVariable))) : typeVariable;
+        }
+        function isJSDocTypeReference(node) {
+            return !!(node.flags & 2097152 /* JSDoc */) && node.kind === 162 /* TypeReference */;
+        }
+        function checkNoTypeArguments(node, symbol) {
+            if (node.typeArguments) {
+                error(node, ts.Diagnostics.Type_0_is_not_generic, symbol ? symbolToString(symbol) : node.typeName ? ts.declarationNameToString(node.typeName) : "(anonymous)");
+                return false;
+            }
+            return true;
+        }
+        function getIntendedTypeFromJSDocTypeReference(node) {
+            if (ts.isIdentifier(node.typeName)) {
+                var typeArgs = node.typeArguments;
+                switch (node.typeName.escapedText) {
+                    case "String":
+                        checkNoTypeArguments(node);
+                        return stringType;
+                    case "Number":
+                        checkNoTypeArguments(node);
+                        return numberType;
+                    case "Boolean":
+                        checkNoTypeArguments(node);
+                        return booleanType;
+                    case "Void":
+                        checkNoTypeArguments(node);
+                        return voidType;
+                    case "Undefined":
+                        checkNoTypeArguments(node);
+                        return undefinedType;
+                    case "Null":
+                        checkNoTypeArguments(node);
+                        return nullType;
+                    case "Function":
+                    case "function":
+                        checkNoTypeArguments(node);
+                        return globalFunctionType;
+                    case "Array":
+                    case "array":
+                        return !typeArgs || !typeArgs.length ? anyArrayType : undefined;
+                    case "Promise":
+                    case "promise":
+                        return !typeArgs || !typeArgs.length ? createPromiseType(anyType) : undefined;
+                    case "Object":
+                        if (typeArgs && typeArgs.length === 2) {
+                            if (ts.isJSDocIndexSignature(node)) {
+                                var indexed = getTypeFromTypeNode(typeArgs[0]);
+                                var target = getTypeFromTypeNode(typeArgs[1]);
+                                var index = createIndexInfo(target, /*isReadonly*/ false);
+                                return createAnonymousType(undefined, emptySymbols, ts.emptyArray, ts.emptyArray, indexed === stringType ? index : undefined, indexed === numberType ? index : undefined);
+                            }
+                            return anyType;
+                        }
+                        checkNoTypeArguments(node);
+                        return anyType;
+                }
+            }
+        }
+        function getTypeFromJSDocNullableTypeNode(node) {
+            var type = getTypeFromTypeNode(node.type);
+            return strictNullChecks ? getNullableType(type, 16384 /* Null */) : type;
+        }
+        function getTypeFromTypeReference(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                var symbol = void 0;
+                var type = void 0;
+                var meaning = 67901928 /* Type */;
+                if (isJSDocTypeReference(node)) {
+                    type = getIntendedTypeFromJSDocTypeReference(node);
+                    meaning |= 67216319 /* Value */;
+                }
+                if (!type) {
+                    symbol = resolveTypeReferenceName(getTypeReferenceName(node), meaning);
+                    type = getTypeReferenceType(node, symbol);
+                }
+                // Cache both the resolved symbol and the resolved type. The resolved symbol is needed in when we check the
+                // type reference in checkTypeReferenceNode.
+                links.resolvedSymbol = symbol;
+                links.resolvedType = type;
+            }
+            return links.resolvedType;
+        }
+        function typeArgumentsFromTypeReferenceNode(node) {
+            return ts.map(node.typeArguments, getTypeFromTypeNode);
+        }
+        function getTypeFromTypeQueryNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                // TypeScript 1.0 spec (April 2014): 3.6.3
+                // The expression is processed as an identifier expression (section 4.3)
+                // or property access expression(section 4.10),
+                // the widened type(section 3.9) of which becomes the result.
+                links.resolvedType = getWidenedType(checkExpression(node.exprName));
+            }
+            return links.resolvedType;
+        }
+        function getTypeOfGlobalSymbol(symbol, arity) {
+            function getTypeDeclaration(symbol) {
+                var declarations = symbol.declarations;
+                for (var _i = 0, declarations_3 = declarations; _i < declarations_3.length; _i++) {
+                    var declaration = declarations_3[_i];
+                    switch (declaration.kind) {
+                        case 235 /* ClassDeclaration */:
+                        case 236 /* InterfaceDeclaration */:
+                        case 238 /* EnumDeclaration */:
+                            return declaration;
+                    }
+                }
+            }
+            if (!symbol) {
+                return arity ? emptyGenericType : emptyObjectType;
+            }
+            var type = getDeclaredTypeOfSymbol(symbol);
+            if (!(type.flags & 131072 /* Object */)) {
+                error(getTypeDeclaration(symbol), ts.Diagnostics.Global_type_0_must_be_a_class_or_interface_type, ts.symbolName(symbol));
+                return arity ? emptyGenericType : emptyObjectType;
+            }
+            if (ts.length(type.typeParameters) !== arity) {
+                error(getTypeDeclaration(symbol), ts.Diagnostics.Global_type_0_must_have_1_type_parameter_s, ts.symbolName(symbol), arity);
+                return arity ? emptyGenericType : emptyObjectType;
+            }
+            return type;
+        }
+        function getGlobalValueSymbol(name, reportErrors) {
+            return getGlobalSymbol(name, 67216319 /* Value */, reportErrors ? ts.Diagnostics.Cannot_find_global_value_0 : undefined);
+        }
+        function getGlobalTypeSymbol(name, reportErrors) {
+            return getGlobalSymbol(name, 67901928 /* Type */, reportErrors ? ts.Diagnostics.Cannot_find_global_type_0 : undefined);
+        }
+        function getGlobalSymbol(name, meaning, diagnostic) {
+            // Don't track references for global symbols anyway, so value if `isReference` is arbitrary
+            return resolveName(undefined, name, meaning, diagnostic, name, /*isUse*/ false);
+        }
+        function getGlobalType(name, arity, reportErrors) {
+            var symbol = getGlobalTypeSymbol(name, reportErrors);
+            return symbol || reportErrors ? getTypeOfGlobalSymbol(symbol, arity) : undefined;
+        }
+        function getGlobalTypedPropertyDescriptorType() {
+            return deferredGlobalTypedPropertyDescriptorType || (deferredGlobalTypedPropertyDescriptorType = getGlobalType("TypedPropertyDescriptor", /*arity*/ 1, /*reportErrors*/ true)) || emptyGenericType;
+        }
+        function getGlobalTemplateStringsArrayType() {
+            return deferredGlobalTemplateStringsArrayType || (deferredGlobalTemplateStringsArrayType = getGlobalType("TemplateStringsArray", /*arity*/ 0, /*reportErrors*/ true)) || emptyObjectType;
+        }
+        function getGlobalImportMetaType() {
+            return deferredGlobalImportMetaType || (deferredGlobalImportMetaType = getGlobalType("ImportMeta", /*arity*/ 0, /*reportErrors*/ true)) || emptyObjectType;
+        }
+        function getGlobalESSymbolConstructorSymbol(reportErrors) {
+            return deferredGlobalESSymbolConstructorSymbol || (deferredGlobalESSymbolConstructorSymbol = getGlobalValueSymbol("Symbol", reportErrors));
+        }
+        function getGlobalESSymbolType(reportErrors) {
+            return deferredGlobalESSymbolType || (deferredGlobalESSymbolType = getGlobalType("Symbol", /*arity*/ 0, reportErrors)) || emptyObjectType;
+        }
+        function getGlobalPromiseType(reportErrors) {
+            return deferredGlobalPromiseType || (deferredGlobalPromiseType = getGlobalType("Promise", /*arity*/ 1, reportErrors)) || emptyGenericType;
+        }
+        function getGlobalPromiseConstructorSymbol(reportErrors) {
+            return deferredGlobalPromiseConstructorSymbol || (deferredGlobalPromiseConstructorSymbol = getGlobalValueSymbol("Promise", reportErrors));
+        }
+        function getGlobalPromiseConstructorLikeType(reportErrors) {
+            return deferredGlobalPromiseConstructorLikeType || (deferredGlobalPromiseConstructorLikeType = getGlobalType("PromiseConstructorLike", /*arity*/ 0, reportErrors)) || emptyObjectType;
+        }
+        function getGlobalAsyncIterableType(reportErrors) {
+            return deferredGlobalAsyncIterableType || (deferredGlobalAsyncIterableType = getGlobalType("AsyncIterable", /*arity*/ 1, reportErrors)) || emptyGenericType;
+        }
+        function getGlobalAsyncIteratorType(reportErrors) {
+            return deferredGlobalAsyncIteratorType || (deferredGlobalAsyncIteratorType = getGlobalType("AsyncIterator", /*arity*/ 1, reportErrors)) || emptyGenericType;
+        }
+        function getGlobalAsyncIterableIteratorType(reportErrors) {
+            return deferredGlobalAsyncIterableIteratorType || (deferredGlobalAsyncIterableIteratorType = getGlobalType("AsyncIterableIterator", /*arity*/ 1, reportErrors)) || emptyGenericType;
+        }
+        function getGlobalIterableType(reportErrors) {
+            return deferredGlobalIterableType || (deferredGlobalIterableType = getGlobalType("Iterable", /*arity*/ 1, reportErrors)) || emptyGenericType;
+        }
+        function getGlobalIteratorType(reportErrors) {
+            return deferredGlobalIteratorType || (deferredGlobalIteratorType = getGlobalType("Iterator", /*arity*/ 1, reportErrors)) || emptyGenericType;
+        }
+        function getGlobalIterableIteratorType(reportErrors) {
+            return deferredGlobalIterableIteratorType || (deferredGlobalIterableIteratorType = getGlobalType("IterableIterator", /*arity*/ 1, reportErrors)) || emptyGenericType;
+        }
+        function getGlobalTypeOrUndefined(name, arity) {
+            if (arity === void 0) { arity = 0; }
+            var symbol = getGlobalSymbol(name, 67901928 /* Type */, /*diagnostic*/ undefined);
+            return symbol && getTypeOfGlobalSymbol(symbol, arity);
+        }
+        function getGlobalExtractSymbol() {
+            return deferredGlobalExtractSymbol || (deferredGlobalExtractSymbol = getGlobalSymbol("Extract", 524288 /* TypeAlias */, ts.Diagnostics.Cannot_find_global_type_0)); // TODO: GH#18217
+        }
+        /**
+         * Instantiates a global type that is generic with some element type, and returns that instantiation.
+         */
+        function createTypeFromGenericGlobalType(genericGlobalType, typeArguments) {
+            return genericGlobalType !== emptyGenericType ? createTypeReference(genericGlobalType, typeArguments) : emptyObjectType;
+        }
+        function createTypedPropertyDescriptorType(propertyType) {
+            return createTypeFromGenericGlobalType(getGlobalTypedPropertyDescriptorType(), [propertyType]);
+        }
+        function createAsyncIterableType(iteratedType) {
+            return createTypeFromGenericGlobalType(getGlobalAsyncIterableType(/*reportErrors*/ true), [iteratedType]);
+        }
+        function createAsyncIterableIteratorType(iteratedType) {
+            return createTypeFromGenericGlobalType(getGlobalAsyncIterableIteratorType(/*reportErrors*/ true), [iteratedType]);
+        }
+        function createIterableType(iteratedType) {
+            return createTypeFromGenericGlobalType(getGlobalIterableType(/*reportErrors*/ true), [iteratedType]);
+        }
+        function createIterableIteratorType(iteratedType) {
+            return createTypeFromGenericGlobalType(getGlobalIterableIteratorType(/*reportErrors*/ true), [iteratedType]);
+        }
+        function createArrayType(elementType) {
+            return createTypeFromGenericGlobalType(globalArrayType, [elementType]);
+        }
+        function getTypeFromArrayTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = createArrayType(getTypeFromTypeNode(node.elementType));
+            }
+            return links.resolvedType;
+        }
+        // We represent tuple types as type references to synthesized generic interface types created by
+        // this function. The types are of the form:
+        //
+        //   interface Tuple<T0, T1, T2, ...> extends Array<T0 | T1 | T2 | ...> { 0: T0, 1: T1, 2: T2, ... }
+        //
+        // Note that the generic type created by this function has no symbol associated with it. The same
+        // is true for each of the synthesized type parameters.
+        function createTupleTypeOfArity(arity) {
+            var typeParameters = [];
+            var properties = [];
+            for (var i = 0; i < arity; i++) {
+                var typeParameter = createType(65536 /* TypeParameter */);
+                typeParameters.push(typeParameter);
+                var property = createSymbol(4 /* Property */, "" + i);
+                property.type = typeParameter;
+                properties.push(property);
+            }
+            var lengthSymbol = createSymbol(4 /* Property */, "length");
+            lengthSymbol.type = getLiteralType(arity);
+            properties.push(lengthSymbol);
+            var type = createObjectType(8 /* Tuple */ | 4 /* Reference */);
+            type.typeParameters = typeParameters;
+            type.outerTypeParameters = undefined;
+            type.localTypeParameters = typeParameters;
+            type.instantiations = ts.createMap();
+            type.instantiations.set(getTypeListId(type.typeParameters), type);
+            type.target = type;
+            type.typeArguments = type.typeParameters;
+            type.thisType = createType(65536 /* TypeParameter */);
+            type.thisType.isThisType = true;
+            type.thisType.constraint = type;
+            type.declaredProperties = properties;
+            type.declaredCallSignatures = ts.emptyArray;
+            type.declaredConstructSignatures = ts.emptyArray;
+            type.declaredStringIndexInfo = undefined;
+            type.declaredNumberIndexInfo = undefined;
+            return type;
+        }
+        function getTupleTypeOfArity(arity) {
+            return tupleTypes[arity] || (tupleTypes[arity] = createTupleTypeOfArity(arity));
+        }
+        function createTupleType(elementTypes) {
+            return createTypeReference(getTupleTypeOfArity(elementTypes.length), elementTypes);
+        }
+        function getTypeFromTupleTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = createTupleType(ts.map(node.elementTypes, getTypeFromTypeNode));
+            }
+            return links.resolvedType;
+        }
+        function getTypeId(type) {
+            return type.id;
+        }
+        function containsType(types, type) {
+            return ts.binarySearch(types, type, getTypeId, ts.compareValues) >= 0;
+        }
+        // Return true if the given intersection type contains
+        // more than one unit type or,
+        // an object type and a nullable type (null or undefined), or
+        // a string-like type and a type known to be non-string-like, or
+        // a number-like type and a type known to be non-number-like, or
+        // a symbol-like type and a type known to be non-symbol-like, or
+        // a void-like type and a type known to be non-void-like, or
+        // a non-primitive type and a type known to be primitive.
+        function isEmptyIntersectionType(type) {
+            var combined = 0;
+            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                var t = _a[_i];
+                if (t.flags & 27072 /* Unit */ && combined & 27072 /* Unit */) {
+                    return true;
+                }
+                combined |= t.flags;
+                if (combined & 24576 /* Nullable */ && combined & (131072 /* Object */ | 16777216 /* NonPrimitive */) ||
+                    combined & 16777216 /* NonPrimitive */ && combined & (16809468 /* DisjointDomains */ & ~16777216 /* NonPrimitive */) ||
+                    combined & 68 /* StringLike */ && combined & (16809468 /* DisjointDomains */ & ~68 /* StringLike */) ||
+                    combined & 168 /* NumberLike */ && combined & (16809468 /* DisjointDomains */ & ~168 /* NumberLike */) ||
+                    combined & 3072 /* ESSymbolLike */ && combined & (16809468 /* DisjointDomains */ & ~3072 /* ESSymbolLike */) ||
+                    combined & 12288 /* VoidLike */ && combined & (16809468 /* DisjointDomains */ & ~12288 /* VoidLike */)) {
+                    return true;
+                }
+            }
+            return false;
+        }
+        function addTypeToUnion(typeSet, includes, type) {
+            var flags = type.flags;
+            if (flags & 262144 /* Union */) {
+                return addTypesToUnion(typeSet, includes, type.types);
+            }
+            // We ignore 'never' types in unions. Likewise, we ignore intersections of unit types as they are
+            // another form of 'never' (in that they have an empty value domain). We could in theory turn
+            // intersections of unit types into 'never' upon construction, but deferring the reduction makes it
+            // easier to reason about their origin.
+            if (!(flags & 32768 /* Never */ || flags & 524288 /* Intersection */ && isEmptyIntersectionType(type))) {
+                includes |= flags & ~939524096 /* ConstructionFlags */;
+                if (flags & 3 /* AnyOrUnknown */) {
+                    if (type === wildcardType)
+                        includes |= 268435456 /* Wildcard */;
+                }
+                else if (!strictNullChecks && flags & 24576 /* Nullable */) {
+                    if (!(flags & 134217728 /* ContainsWideningType */))
+                        includes |= 134217728 /* NonWideningType */;
+                }
+                else {
+                    var len = typeSet.length;
+                    var index = len && type.id > typeSet[len - 1].id ? ~len : ts.binarySearch(typeSet, type, getTypeId, ts.compareValues);
+                    if (index < 0) {
+                        if (!(flags & 131072 /* Object */ && type.objectFlags & 16 /* Anonymous */ &&
+                            type.symbol && type.symbol.flags & (16 /* Function */ | 8192 /* Method */) && containsIdenticalType(typeSet, type))) {
+                            typeSet.splice(~index, 0, type);
+                        }
+                    }
+                }
+            }
+            return includes;
+        }
+        // Add the given types to the given type set. Order is preserved, duplicates are removed,
+        // and nested types of the given kind are flattened into the set.
+        function addTypesToUnion(typeSet, includes, types) {
+            for (var _i = 0, types_6 = types; _i < types_6.length; _i++) {
+                var type = types_6[_i];
+                includes = addTypeToUnion(typeSet, includes, type);
+            }
+            return includes;
+        }
+        function containsIdenticalType(types, type) {
+            for (var _i = 0, types_7 = types; _i < types_7.length; _i++) {
+                var t = types_7[_i];
+                if (isTypeIdenticalTo(t, type)) {
+                    return true;
+                }
+            }
+            return false;
+        }
+        function isSubtypeOfAny(source, targets) {
+            for (var _i = 0, targets_1 = targets; _i < targets_1.length; _i++) {
+                var target = targets_1[_i];
+                if (source !== target && isTypeSubtypeOf(source, target) && (!(ts.getObjectFlags(getTargetType(source)) & 1 /* Class */) ||
+                    !(ts.getObjectFlags(getTargetType(target)) & 1 /* Class */) ||
+                    isTypeDerivedFrom(source, target))) {
+                    return true;
+                }
+            }
+            return false;
+        }
+        function isSetOfLiteralsFromSameEnum(types) {
+            var first = types[0];
+            if (first.flags & 512 /* EnumLiteral */) {
+                var firstEnum = getParentOfSymbol(first.symbol);
+                for (var i = 1; i < types.length; i++) {
+                    var other = types[i];
+                    if (!(other.flags & 512 /* EnumLiteral */) || (firstEnum !== getParentOfSymbol(other.symbol))) {
+                        return false;
+                    }
+                }
+                return true;
+            }
+            return false;
+        }
+        function removeSubtypes(types) {
+            if (types.length === 0 || isSetOfLiteralsFromSameEnum(types)) {
+                return;
+            }
+            var i = types.length;
+            while (i > 0) {
+                i--;
+                if (isSubtypeOfAny(types[i], types)) {
+                    ts.orderedRemoveItemAt(types, i);
+                }
+            }
+        }
+        function removeRedundantLiteralTypes(types, includes) {
+            var i = types.length;
+            while (i > 0) {
+                i--;
+                var t = types[i];
+                var remove = t.flags & 64 /* StringLiteral */ && includes & 4 /* String */ ||
+                    t.flags & 128 /* NumberLiteral */ && includes & 8 /* Number */ ||
+                    t.flags & 2048 /* UniqueESSymbol */ && includes & 1024 /* ESSymbol */ ||
+                    t.flags & 192 /* StringOrNumberLiteral */ && t.flags & 33554432 /* FreshLiteral */ && containsType(types, t.regularType);
+                if (remove) {
+                    ts.orderedRemoveItemAt(types, i);
+                }
+            }
+        }
+        // We sort and deduplicate the constituent types based on object identity. If the subtypeReduction
+        // flag is specified we also reduce the constituent type set to only include types that aren't subtypes
+        // of other types. Subtype reduction is expensive for large union types and is possible only when union
+        // types are known not to circularly reference themselves (as is the case with union types created by
+        // expression constructs such as array literals and the || and ?: operators). Named types can
+        // circularly reference themselves and therefore cannot be subtype reduced during their declaration.
+        // For example, "type Item = string | (() => Item" is a named type that circularly references itself.
+        function getUnionType(types, unionReduction, aliasSymbol, aliasTypeArguments) {
+            if (unionReduction === void 0) { unionReduction = 1 /* Literal */; }
+            if (types.length === 0) {
+                return neverType;
+            }
+            if (types.length === 1) {
+                return types[0];
+            }
+            var typeSet = [];
+            var includes = addTypesToUnion(typeSet, 0, types);
+            if (includes & 3 /* AnyOrUnknown */) {
+                return includes & 1 /* Any */ ? includes & 268435456 /* Wildcard */ ? wildcardType : anyType : unknownType;
+            }
+            switch (unionReduction) {
+                case 1 /* Literal */:
+                    if (includes & 2240 /* StringOrNumberLiteralOrUnique */) {
+                        removeRedundantLiteralTypes(typeSet, includes);
+                    }
+                    break;
+                case 2 /* Subtype */:
+                    removeSubtypes(typeSet);
+                    break;
+            }
+            if (typeSet.length === 0) {
+                return includes & 16384 /* Null */ ? includes & 134217728 /* NonWideningType */ ? nullType : nullWideningType :
+                    includes & 8192 /* Undefined */ ? includes & 134217728 /* NonWideningType */ ? undefinedType : undefinedWideningType :
+                        neverType;
+            }
+            return getUnionTypeFromSortedList(typeSet, includes & 16749629 /* NotUnit */ ? 0 : 67108864 /* UnionOfUnitTypes */, aliasSymbol, aliasTypeArguments);
+        }
+        function getUnionTypePredicate(signatures) {
+            var first;
+            var types = [];
+            for (var _i = 0, signatures_2 = signatures; _i < signatures_2.length; _i++) {
+                var sig = signatures_2[_i];
+                var pred = getTypePredicateOfSignature(sig);
+                if (!pred) {
+                    continue;
+                }
+                if (first) {
+                    if (!typePredicateKindsMatch(first, pred)) {
+                        // No common type predicate.
+                        return undefined;
+                    }
+                }
+                else {
+                    first = pred;
+                }
+                types.push(pred.type);
+            }
+            if (!first) {
+                // No union signatures had a type predicate.
+                return undefined;
+            }
+            var unionType = getUnionType(types);
+            return ts.isIdentifierTypePredicate(first)
+                ? createIdentifierTypePredicate(first.parameterName, first.parameterIndex, unionType)
+                : createThisTypePredicate(unionType);
+        }
+        function typePredicateKindsMatch(a, b) {
+            return ts.isIdentifierTypePredicate(a)
+                ? ts.isIdentifierTypePredicate(b) && a.parameterIndex === b.parameterIndex
+                : !ts.isIdentifierTypePredicate(b);
+        }
+        // This function assumes the constituent type list is sorted and deduplicated.
+        function getUnionTypeFromSortedList(types, unionOfUnitTypes, aliasSymbol, aliasTypeArguments) {
+            if (types.length === 0) {
+                return neverType;
+            }
+            if (types.length === 1) {
+                return types[0];
+            }
+            var id = getTypeListId(types);
+            var type = unionTypes.get(id);
+            if (!type) {
+                var propagatedFlags = getPropagatingFlagsOfTypes(types, /*excludeKinds*/ 24576 /* Nullable */);
+                type = createType(262144 /* Union */ | propagatedFlags | unionOfUnitTypes);
+                unionTypes.set(id, type);
+                type.types = types;
+                /*
+                Note: This is the alias symbol (or lack thereof) that we see when we first encounter this union type.
+                For aliases of identical unions, eg `type T = A | B; type U = A | B`, the symbol of the first alias encountered is the aliasSymbol.
+                (In the language service, the order may depend on the order in which a user takes actions, such as hovering over symbols.)
+                It's important that we create equivalent union types only once, so that's an unfortunate side effect.
+                */
+                type.aliasSymbol = aliasSymbol;
+                type.aliasTypeArguments = aliasTypeArguments;
+            }
+            return type;
+        }
+        function getTypeFromUnionTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                var aliasSymbol = getAliasSymbolForTypeNode(node);
+                links.resolvedType = getUnionType(ts.map(node.types, getTypeFromTypeNode), 1 /* Literal */, aliasSymbol, getTypeArgumentsForAliasSymbol(aliasSymbol));
+            }
+            return links.resolvedType;
+        }
+        function addTypeToIntersection(typeSet, includes, type) {
+            var flags = type.flags;
+            if (flags & 524288 /* Intersection */) {
+                return addTypesToIntersection(typeSet, includes, type.types);
+            }
+            if (ts.getObjectFlags(type) & 16 /* Anonymous */ && isEmptyObjectType(type)) {
+                includes |= 536870912 /* EmptyObject */;
+            }
+            else {
+                includes |= flags & ~939524096 /* ConstructionFlags */;
+                if (flags & 3 /* AnyOrUnknown */) {
+                    if (type === wildcardType)
+                        includes |= 268435456 /* Wildcard */;
+                }
+                else if ((strictNullChecks || !(flags & 24576 /* Nullable */)) && !ts.contains(typeSet, type) &&
+                    !(flags & 131072 /* Object */ && type.objectFlags & 16 /* Anonymous */ &&
+                        type.symbol && type.symbol.flags & (16 /* Function */ | 8192 /* Method */) &&
+                        containsIdenticalType(typeSet, type))) {
+                    typeSet.push(type);
+                }
+            }
+            return includes;
+        }
+        // Add the given types to the given type set. Order is preserved, freshness is removed from literal
+        // types, duplicates are removed, and nested types of the given kind are flattened into the set.
+        function addTypesToIntersection(typeSet, includes, types) {
+            for (var _i = 0, types_8 = types; _i < types_8.length; _i++) {
+                var type = types_8[_i];
+                includes = addTypeToIntersection(typeSet, includes, getRegularTypeOfLiteralType(type));
+            }
+            return includes;
+        }
+        function removeRedundantPrimitiveTypes(types, includes) {
+            var i = types.length;
+            while (i > 0) {
+                i--;
+                var t = types[i];
+                var remove = t.flags & 4 /* String */ && includes & 64 /* StringLiteral */ ||
+                    t.flags & 8 /* Number */ && includes & 128 /* NumberLiteral */ ||
+                    t.flags & 1024 /* ESSymbol */ && includes & 2048 /* UniqueESSymbol */;
+                if (remove) {
+                    ts.orderedRemoveItemAt(types, i);
+                }
+            }
+        }
+        // When intersecting unions of unit types we can simply intersect based on type identity.
+        // Here we remove all unions of unit types from the given list and replace them with a
+        // a single union containing an intersection of the unit types.
+        function intersectUnionsOfUnitTypes(types) {
+            var unionIndex = ts.findIndex(types, function (t) { return (t.flags & 67108864 /* UnionOfUnitTypes */) !== 0; });
+            var unionType = types[unionIndex];
+            var intersection = unionType.types;
+            var i = types.length - 1;
+            var _loop_6 = function () {
+                var t = types[i];
+                if (t.flags & 67108864 /* UnionOfUnitTypes */) {
+                    intersection = ts.filter(intersection, function (u) { return containsType(t.types, u); });
+                    ts.orderedRemoveItemAt(types, i);
+                }
+                i--;
+            };
+            while (i > unionIndex) {
+                _loop_6();
+            }
+            if (intersection === unionType.types) {
+                return false;
+            }
+            types[unionIndex] = getUnionTypeFromSortedList(intersection, unionType.flags & 67108864 /* UnionOfUnitTypes */);
+            return true;
+        }
+        // We normalize combinations of intersection and union types based on the distributive property of the '&'
+        // operator. Specifically, because X & (A | B) is equivalent to X & A | X & B, we can transform intersection
+        // types with union type constituents into equivalent union types with intersection type constituents and
+        // effectively ensure that union types are always at the top level in type representations.
+        //
+        // We do not perform structural deduplication on intersection types. Intersection types are created only by the &
+        // type operator and we can't reduce those because we want to support recursive intersection types. For example,
+        // a type alias of the form "type List<T> = T & { next: List<T> }" cannot be reduced during its declaration.
+        // Also, unlike union types, the order of the constituent types is preserved in order that overload resolution
+        // for intersections of types with signatures can be deterministic.
+        function getIntersectionType(types, aliasSymbol, aliasTypeArguments) {
+            var typeSet = [];
+            var includes = addTypesToIntersection(typeSet, 0, types);
+            if (includes & 32768 /* Never */) {
+                return neverType;
+            }
+            if (includes & 1 /* Any */) {
+                return includes & 268435456 /* Wildcard */ ? wildcardType : anyType;
+            }
+            if (!strictNullChecks && includes & 24576 /* Nullable */) {
+                return includes & 8192 /* Undefined */ ? undefinedType : nullType;
+            }
+            if (includes & 4 /* String */ && includes & 64 /* StringLiteral */ ||
+                includes & 8 /* Number */ && includes & 128 /* NumberLiteral */ ||
+                includes & 1024 /* ESSymbol */ && includes & 2048 /* UniqueESSymbol */) {
+                removeRedundantPrimitiveTypes(typeSet, includes);
+            }
+            if (includes & 536870912 /* EmptyObject */ && !(includes & 131072 /* Object */)) {
+                typeSet.push(emptyObjectType);
+            }
+            if (typeSet.length === 0) {
+                return unknownType;
+            }
+            if (typeSet.length === 1) {
+                return typeSet[0];
+            }
+            if (includes & 262144 /* Union */) {
+                if (includes & 67108864 /* UnionOfUnitTypes */ && intersectUnionsOfUnitTypes(typeSet)) {
+                    // When the intersection creates a reduced set (which might mean that *all* union types have
+                    // disappeared), we restart the operation to get a new set of combined flags. Once we have
+                    // reduced we'll never reduce again, so this occurs at most once.
+                    return getIntersectionType(typeSet, aliasSymbol, aliasTypeArguments);
+                }
+                // We are attempting to construct a type of the form X & (A | B) & Y. Transform this into a type of
+                // the form X & A & Y | X & B & Y and recursively reduce until no union type constituents remain.
+                var unionIndex_1 = ts.findIndex(typeSet, function (t) { return (t.flags & 262144 /* Union */) !== 0; });
+                var unionType = typeSet[unionIndex_1];
+                return getUnionType(ts.map(unionType.types, function (t) { return getIntersectionType(ts.replaceElement(typeSet, unionIndex_1, t)); }), 1 /* Literal */, aliasSymbol, aliasTypeArguments);
+            }
+            var id = getTypeListId(typeSet);
+            var type = intersectionTypes.get(id);
+            if (!type) {
+                var propagatedFlags = getPropagatingFlagsOfTypes(typeSet, /*excludeKinds*/ 24576 /* Nullable */);
+                type = createType(524288 /* Intersection */ | propagatedFlags);
+                intersectionTypes.set(id, type);
+                type.types = typeSet;
+                type.aliasSymbol = aliasSymbol; // See comment in `getUnionTypeFromSortedList`.
+                type.aliasTypeArguments = aliasTypeArguments;
+            }
+            return type;
+        }
+        function getTypeFromIntersectionTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                var aliasSymbol = getAliasSymbolForTypeNode(node);
+                links.resolvedType = getIntersectionType(ts.map(node.types, getTypeFromTypeNode), aliasSymbol, getTypeArgumentsForAliasSymbol(aliasSymbol));
+            }
+            return links.resolvedType;
+        }
+        function createIndexType(type, stringsOnly) {
+            var result = createType(1048576 /* Index */);
+            result.type = type;
+            result.stringsOnly = stringsOnly;
+            return result;
+        }
+        function getIndexTypeForGenericType(type, stringsOnly) {
+            return stringsOnly ?
+                type.resolvedStringIndexType || (type.resolvedStringIndexType = createIndexType(type, /*stringsOnly*/ true)) :
+                type.resolvedIndexType || (type.resolvedIndexType = createIndexType(type, /*stringsOnly*/ false));
+        }
+        function getLiteralTypeFromPropertyName(prop, include) {
+            if (!(ts.getDeclarationModifierFlagsFromSymbol(prop) & 24 /* NonPublicAccessibilityModifier */)) {
+                var type = getLateBoundSymbol(prop).nameType;
+                if (!type && !ts.isKnownSymbol(prop)) {
+                    var name = ts.getNameOfDeclaration(prop.valueDeclaration);
+                    type = name && ts.isNumericLiteral(name) ? getLiteralType(+name.text) :
+                        name && name.kind === 147 /* ComputedPropertyName */ && ts.isNumericLiteral(name.expression) ? getLiteralType(+name.expression.text) :
+                            getLiteralType(ts.symbolName(prop));
+                }
+                if (type && type.flags & include) {
+                    return type;
+                }
+            }
+            return neverType;
+        }
+        function getLiteralTypeFromPropertyNames(type, include) {
+            return getUnionType(ts.map(getPropertiesOfType(type), function (t) { return getLiteralTypeFromPropertyName(t, include); }));
+        }
+        function getNonEnumNumberIndexInfo(type) {
+            var numberIndexInfo = getIndexInfoOfType(type, 1 /* Number */);
+            return numberIndexInfo !== enumNumberIndexInfo ? numberIndexInfo : undefined;
+        }
+        function getIndexType(type, stringsOnly) {
+            if (stringsOnly === void 0) { stringsOnly = keyofStringsOnly; }
+            return type.flags & 262144 /* Union */ ? getIntersectionType(ts.map(type.types, function (t) { return getIndexType(t, stringsOnly); })) :
+                type.flags & 524288 /* Intersection */ ? getUnionType(ts.map(type.types, function (t) { return getIndexType(t, stringsOnly); })) :
+                    maybeTypeOfKind(type, 14745600 /* InstantiableNonPrimitive */) ? getIndexTypeForGenericType(type, stringsOnly) :
+                        ts.getObjectFlags(type) & 32 /* Mapped */ ? getConstraintTypeFromMappedType(type) :
+                            type === wildcardType ? wildcardType :
+                                type.flags & 1 /* Any */ ? keyofConstraintType :
+                                    stringsOnly ? getIndexInfoOfType(type, 0 /* String */) ? stringType : getLiteralTypeFromPropertyNames(type, 64 /* StringLiteral */) :
+                                        getIndexInfoOfType(type, 0 /* String */) ? getUnionType([stringType, numberType, getLiteralTypeFromPropertyNames(type, 2048 /* UniqueESSymbol */)]) :
+                                            getNonEnumNumberIndexInfo(type) ? getUnionType([numberType, getLiteralTypeFromPropertyNames(type, 64 /* StringLiteral */ | 2048 /* UniqueESSymbol */)]) :
+                                                getLiteralTypeFromPropertyNames(type, 2240 /* StringOrNumberLiteralOrUnique */);
+        }
+        function getExtractStringType(type) {
+            if (keyofStringsOnly) {
+                return type;
+            }
+            var extractTypeAlias = getGlobalExtractSymbol();
+            return extractTypeAlias ? getTypeAliasInstantiation(extractTypeAlias, [type, stringType]) : stringType;
+        }
+        function getIndexTypeOrString(type) {
+            var indexType = getExtractStringType(getIndexType(type));
+            return indexType.flags & 32768 /* Never */ ? stringType : indexType;
+        }
+        function getTypeFromTypeOperatorNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                switch (node.operator) {
+                    case 128 /* KeyOfKeyword */:
+                        links.resolvedType = getIndexType(getTypeFromTypeNode(node.type));
+                        break;
+                    case 141 /* UniqueKeyword */:
+                        links.resolvedType = node.type.kind === 138 /* SymbolKeyword */
+                            ? getESSymbolLikeTypeForNode(ts.walkUpParenthesizedTypes(node.parent))
+                            : errorType;
+                        break;
+                }
+            }
+            return links.resolvedType; // TODO: GH#18217
+        }
+        function createIndexedAccessType(objectType, indexType) {
+            var type = createType(2097152 /* IndexedAccess */);
+            type.objectType = objectType;
+            type.indexType = indexType;
+            return type;
+        }
+        function getPropertyTypeForIndexType(objectType, indexType, accessNode, cacheSymbol) {
+            var accessExpression = accessNode && accessNode.kind === 186 /* ElementAccessExpression */ ? accessNode : undefined;
+            var propName = isTypeUsableAsLateBoundName(indexType) ? getLateBoundNameFromType(indexType) :
+                accessExpression && checkThatExpressionIsProperSymbolReference(accessExpression.argumentExpression, indexType, /*reportError*/ false) ?
+                    ts.getPropertyNameForKnownSymbolName(ts.idText(accessExpression.argumentExpression.name)) :
+                    undefined;
+            if (propName !== undefined) {
+                var prop = getPropertyOfType(objectType, propName);
+                if (prop) {
+                    if (accessExpression) {
+                        markPropertyAsReferenced(prop, accessExpression, /*isThisAccess*/ accessExpression.expression.kind === 99 /* ThisKeyword */);
+                        if (ts.isAssignmentTarget(accessExpression) && (isReferenceToReadonlyEntity(accessExpression, prop) || isReferenceThroughNamespaceImport(accessExpression))) {
+                            error(accessExpression.argumentExpression, ts.Diagnostics.Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property, symbolToString(prop));
+                            return errorType;
+                        }
+                        if (cacheSymbol) {
+                            getNodeLinks(accessNode).resolvedSymbol = prop;
+                        }
+                    }
+                    return getTypeOfSymbol(prop);
+                }
+            }
+            if (!(indexType.flags & 24576 /* Nullable */) && isTypeAssignableToKind(indexType, 68 /* StringLike */ | 168 /* NumberLike */ | 3072 /* ESSymbolLike */)) {
+                if (isTypeAny(objectType)) {
+                    return objectType;
+                }
+                var indexInfo = isTypeAssignableToKind(indexType, 168 /* NumberLike */) && getIndexInfoOfType(objectType, 1 /* Number */) ||
+                    getIndexInfoOfType(objectType, 0 /* String */) ||
+                    undefined;
+                if (indexInfo) {
+                    if (accessNode && !isTypeAssignableToKind(indexType, 4 /* String */ | 8 /* Number */)) {
+                        var indexNode = accessNode.kind === 186 /* ElementAccessExpression */ ? accessNode.argumentExpression : accessNode.indexType;
+                        error(indexNode, ts.Diagnostics.Type_0_cannot_be_used_as_an_index_type, typeToString(indexType));
+                    }
+                    else if (accessExpression && indexInfo.isReadonly && (ts.isAssignmentTarget(accessExpression) || ts.isDeleteTarget(accessExpression))) {
+                        error(accessExpression, ts.Diagnostics.Index_signature_in_type_0_only_permits_reading, typeToString(objectType));
+                    }
+                    return indexInfo.type;
+                }
+                if (indexType.flags & 32768 /* Never */) {
+                    return neverType;
+                }
+                if (accessExpression && !isConstEnumObjectType(objectType)) {
+                    if (noImplicitAny && !compilerOptions.suppressImplicitAnyIndexErrors) {
+                        if (getIndexTypeOfType(objectType, 1 /* Number */)) {
+                            error(accessExpression.argumentExpression, ts.Diagnostics.Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number);
+                        }
+                        else {
+                            error(accessExpression, ts.Diagnostics.Element_implicitly_has_an_any_type_because_type_0_has_no_index_signature, typeToString(objectType));
+                        }
+                    }
+                    return anyType;
+                }
+            }
+            if (accessNode) {
+                var indexNode = accessNode.kind === 186 /* ElementAccessExpression */ ? accessNode.argumentExpression : accessNode.indexType;
+                if (indexType.flags & (64 /* StringLiteral */ | 128 /* NumberLiteral */)) {
+                    error(indexNode, ts.Diagnostics.Property_0_does_not_exist_on_type_1, "" + indexType.value, typeToString(objectType));
+                }
+                else if (indexType.flags & (4 /* String */ | 8 /* Number */)) {
+                    error(indexNode, ts.Diagnostics.Type_0_has_no_matching_index_signature_for_type_1, typeToString(objectType), typeToString(indexType));
+                }
+                else {
+                    error(indexNode, ts.Diagnostics.Type_0_cannot_be_used_as_an_index_type, typeToString(indexType));
+                }
+            }
+            return errorType;
+        }
+        function isGenericObjectType(type) {
+            return maybeTypeOfKind(type, 14745600 /* InstantiableNonPrimitive */ | 134217728 /* GenericMappedType */);
+        }
+        function isGenericIndexType(type) {
+            return maybeTypeOfKind(type, 14745600 /* InstantiableNonPrimitive */ | 1048576 /* Index */);
+        }
+        // Return true if the given type is a non-generic object type with a string index signature and no
+        // other members.
+        function isStringIndexOnlyType(type) {
+            if (type.flags & 131072 /* Object */ && !isGenericMappedType(type)) {
+                var t = resolveStructuredTypeMembers(type);
+                return t.properties.length === 0 &&
+                    t.callSignatures.length === 0 && t.constructSignatures.length === 0 &&
+                    !!t.stringIndexInfo && !t.numberIndexInfo;
+            }
+            return false;
+        }
+        function isMappedTypeToNever(type) {
+            return !!(ts.getObjectFlags(type) & 32 /* Mapped */) && getTemplateTypeFromMappedType(type) === neverType;
+        }
+        function getSimplifiedType(type) {
+            return type.flags & 2097152 /* IndexedAccess */ ? getSimplifiedIndexedAccessType(type) : type;
+        }
+        // Transform an indexed access to a simpler form, if possible. Return the simpler form, or return
+        // the type itself if no transformation is possible.
+        function getSimplifiedIndexedAccessType(type) {
+            if (type.simplified) {
+                return type.simplified === circularConstraintType ? type : type.simplified;
+            }
+            type.simplified = circularConstraintType;
+            // We recursively simplify the object type as it may in turn be an indexed access type. For example, with
+            // '{ [P in T]: { [Q in U]: number } }[T][U]' we want to first simplify the inner indexed access type.
+            var objectType = getSimplifiedType(type.objectType);
+            if (objectType.flags & 524288 /* Intersection */ && isGenericObjectType(objectType)) {
+                // Given an indexed access type T[K], if T is an intersection containing one or more generic types and one or
+                // more object types with only a string index signature, e.g. '(U & V & { [x: string]: D })[K]', return a
+                // transformed type of the form '(U & V)[K] | D'. This allows us to properly reason about higher order indexed
+                // access types with default property values as expressed by D.
+                if (ts.some(objectType.types, isStringIndexOnlyType)) {
+                    var regularTypes = [];
+                    var stringIndexTypes = [];
+                    for (var _i = 0, _a = objectType.types; _i < _a.length; _i++) {
+                        var t = _a[_i];
+                        if (isStringIndexOnlyType(t)) {
+                            stringIndexTypes.push(getIndexTypeOfType(t, 0 /* String */));
+                        }
+                        else {
+                            regularTypes.push(t);
+                        }
+                    }
+                    return type.simplified = getUnionType([
+                        getSimplifiedType(getIndexedAccessType(getIntersectionType(regularTypes), type.indexType)),
+                        getIntersectionType(stringIndexTypes)
+                    ]);
+                }
+                // Given an indexed access type T[K], if T is an intersection containing one or more generic types and one or
+                // more mapped types with a template type `never`, '(U & V & { [P in T]: never })[K]', return a
+                // transformed type that removes the never-mapped type: '(U & V)[K]'. This mirrors what would happen
+                // eventually anyway, but it easier to reason about.
+                if (ts.some(objectType.types, isMappedTypeToNever)) {
+                    var nonNeverTypes = ts.filter(objectType.types, function (t) { return !isMappedTypeToNever(t); });
+                    return type.simplified = getSimplifiedType(getIndexedAccessType(getIntersectionType(nonNeverTypes), type.indexType));
+                }
+            }
+            // If the object type is a mapped type { [P in K]: E }, where K is generic, instantiate E using a mapper
+            // that substitutes the index type for P. For example, for an index access { [P in K]: Box<T[P]> }[X], we
+            // construct the type Box<T[X]>. We do not further simplify the result because mapped types can be recursive
+            // and we might never terminate.
+            if (isGenericMappedType(objectType)) {
+                return type.simplified = substituteIndexedMappedType(objectType, type);
+            }
+            if (objectType.flags & 65536 /* TypeParameter */) {
+                var constraint = getConstraintFromTypeParameter(objectType);
+                if (constraint && isGenericMappedType(constraint)) {
+                    return type.simplified = substituteIndexedMappedType(constraint, type);
+                }
+            }
+            return type.simplified = type;
+        }
+        function substituteIndexedMappedType(objectType, type) {
+            var mapper = createTypeMapper([getTypeParameterFromMappedType(objectType)], [type.indexType]);
+            var templateMapper = combineTypeMappers(objectType.mapper, mapper);
+            return instantiateType(getTemplateTypeFromMappedType(objectType), templateMapper);
+        }
+        function getIndexedAccessType(objectType, indexType, accessNode) {
+            if (objectType === wildcardType || indexType === wildcardType) {
+                return wildcardType;
+            }
+            // If the index type is generic, or if the object type is generic and doesn't originate in an expression,
+            // we are performing a higher-order index access where we cannot meaningfully access the properties of the
+            // object type. Note that for a generic T and a non-generic K, we eagerly resolve T[K] if it originates in
+            // an expression. This is to preserve backwards compatibility. For example, an element access 'this["foo"]'
+            // has always been resolved eagerly using the constraint type of 'this' at the given location.
+            if (isGenericIndexType(indexType) || !(accessNode && accessNode.kind === 186 /* ElementAccessExpression */) && isGenericObjectType(objectType)) {
+                if (objectType.flags & 3 /* AnyOrUnknown */) {
+                    return objectType;
+                }
+                // Defer the operation by creating an indexed access type.
+                var id = objectType.id + "," + indexType.id;
+                var type = indexedAccessTypes.get(id);
+                if (!type) {
+                    indexedAccessTypes.set(id, type = createIndexedAccessType(objectType, indexType));
+                }
+                return type;
+            }
+            // In the following we resolve T[K] to the type of the property in T selected by K.
+            // We treat boolean as different from other unions to improve errors;
+            // skipping straight to getPropertyTypeForIndexType gives errors with 'boolean' instead of 'true'.
+            var apparentObjectType = getApparentType(objectType);
+            if (indexType.flags & 262144 /* Union */ && !(indexType.flags & 16 /* Boolean */)) {
+                var propTypes = [];
+                for (var _i = 0, _a = indexType.types; _i < _a.length; _i++) {
+                    var t = _a[_i];
+                    var propType = getPropertyTypeForIndexType(apparentObjectType, t, accessNode, /*cacheSymbol*/ false);
+                    if (propType === errorType) {
+                        return errorType;
+                    }
+                    propTypes.push(propType);
+                }
+                return getUnionType(propTypes);
+            }
+            return getPropertyTypeForIndexType(apparentObjectType, indexType, accessNode, /*cacheSymbol*/ true);
+        }
+        function getTypeFromIndexedAccessTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                var objectType = getTypeFromTypeNode(node.objectType);
+                var indexType = getTypeFromTypeNode(node.indexType);
+                var resolved = getIndexedAccessType(objectType, indexType, node);
+                links.resolvedType = resolved.flags & 2097152 /* IndexedAccess */ &&
+                    resolved.objectType === objectType &&
+                    resolved.indexType === indexType ?
+                    getConstrainedTypeVariable(resolved, node) : resolved;
+            }
+            return links.resolvedType;
+        }
+        function getTypeFromMappedTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                var type = createObjectType(32 /* Mapped */, node.symbol);
+                type.declaration = node;
+                type.aliasSymbol = getAliasSymbolForTypeNode(node);
+                type.aliasTypeArguments = getTypeArgumentsForAliasSymbol(type.aliasSymbol);
+                links.resolvedType = type;
+                // Eagerly resolve the constraint type which forces an error if the constraint type circularly
+                // references itself through one or more type aliases.
+                getConstraintTypeFromMappedType(type);
+            }
+            return links.resolvedType;
+        }
+        function getActualTypeVariable(type) {
+            return type.flags & 8388608 /* Substitution */ ? type.typeVariable : type;
+        }
+        function getConditionalType(root, mapper) {
+            var checkType = instantiateType(root.checkType, mapper);
+            var extendsType = instantiateType(root.extendsType, mapper);
+            if (checkType === wildcardType || extendsType === wildcardType) {
+                return wildcardType;
+            }
+            // If this is a distributive conditional type and the check type is generic we need to defer
+            // resolution of the conditional type such that a later instantiation will properly distribute
+            // over union types.
+            var isDeferred = root.isDistributive && maybeTypeOfKind(checkType, 15794176 /* Instantiable */);
+            var combinedMapper;
+            if (root.inferTypeParameters) {
+                var context = createInferenceContext(root.inferTypeParameters, /*signature*/ undefined, 0 /* None */);
+                if (!isDeferred) {
+                    // We don't want inferences from constraints as they may cause us to eagerly resolve the
+                    // conditional type instead of deferring resolution. Also, we always want strict function
+                    // types rules (i.e. proper contravariance) for inferences.
+                    inferTypes(context.inferences, checkType, extendsType, 32 /* NoConstraints */ | 64 /* AlwaysStrict */);
+                }
+                combinedMapper = combineTypeMappers(mapper, context);
+            }
+            if (!isDeferred) {
+                if (extendsType.flags & 3 /* AnyOrUnknown */) {
+                    return instantiateType(root.trueType, mapper);
+                }
+                // Return union of trueType and falseType for 'any' since it matches anything
+                if (checkType.flags & 1 /* Any */) {
+                    return getUnionType([instantiateType(root.trueType, combinedMapper || mapper), instantiateType(root.falseType, mapper)]);
+                }
+                // Instantiate the extends type including inferences for 'infer T' type parameters
+                var inferredExtendsType = combinedMapper ? instantiateType(root.extendsType, combinedMapper) : extendsType;
+                // Return falseType for a definitely false extends check. We check an instantations of the two
+                // types with type parameters mapped to the wildcard type, the most permissive instantiations
+                // possible (the wildcard type is assignable to and from all types). If those are not related,
+                // then no instatiations will be and we can just return the false branch type.
+                if (!isTypeAssignableTo(getWildcardInstantiation(checkType), getWildcardInstantiation(inferredExtendsType))) {
+                    return instantiateType(root.falseType, mapper);
+                }
+                // Return trueType for a definitely true extends check. The definitely assignable relation excludes
+                // type variable constraints from consideration. Without the definitely assignable relation, the type
+                //   type Foo<T extends { x: any }> = T extends { x: string } ? string : number
+                // would immediately resolve to 'string' instead of being deferred.
+                if (checkTypeRelatedTo(checkType, inferredExtendsType, definitelyAssignableRelation, /*errorNode*/ undefined)) {
+                    return instantiateType(root.trueType, combinedMapper || mapper);
+                }
+            }
+            // Return a deferred type for a check that is neither definitely true nor definitely false
+            var erasedCheckType = getActualTypeVariable(checkType);
+            var result = createType(4194304 /* Conditional */);
+            result.root = root;
+            result.checkType = erasedCheckType;
+            result.extendsType = extendsType;
+            result.mapper = mapper;
+            result.combinedMapper = combinedMapper;
+            result.aliasSymbol = root.aliasSymbol;
+            result.aliasTypeArguments = instantiateTypes(root.aliasTypeArguments, mapper); // TODO: GH#18217
+            return result;
+        }
+        function getTrueTypeFromConditionalType(type) {
+            return type.resolvedTrueType || (type.resolvedTrueType = instantiateType(type.root.trueType, type.mapper));
+        }
+        function getFalseTypeFromConditionalType(type) {
+            return type.resolvedFalseType || (type.resolvedFalseType = instantiateType(type.root.falseType, type.mapper));
+        }
+        function getInferTypeParameters(node) {
+            var result;
+            if (node.locals) {
+                node.locals.forEach(function (symbol) {
+                    if (symbol.flags & 262144 /* TypeParameter */) {
+                        result = ts.append(result, getDeclaredTypeOfSymbol(symbol));
+                    }
+                });
+            }
+            return result;
+        }
+        function isPossiblyReferencedInConditionalType(tp, node) {
+            if (isTypeParameterPossiblyReferenced(tp, node)) {
+                return true;
+            }
+            while (node) {
+                if (node.kind === 171 /* ConditionalType */) {
+                    if (isTypeParameterPossiblyReferenced(tp, node.extendsType)) {
+                        return true;
+                    }
+                }
+                node = node.parent;
+            }
+            return false;
+        }
+        function getTypeFromConditionalTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                var checkType = getTypeFromTypeNode(node.checkType);
+                var aliasSymbol = getAliasSymbolForTypeNode(node);
+                var aliasTypeArguments = getTypeArgumentsForAliasSymbol(aliasSymbol);
+                var allOuterTypeParameters = getOuterTypeParameters(node, /*includeThisTypes*/ true);
+                var outerTypeParameters = aliasTypeArguments ? allOuterTypeParameters : ts.filter(allOuterTypeParameters, function (tp) { return isPossiblyReferencedInConditionalType(tp, node); });
+                var root = {
+                    node: node,
+                    checkType: checkType,
+                    extendsType: getTypeFromTypeNode(node.extendsType),
+                    trueType: getTypeFromTypeNode(node.trueType),
+                    falseType: getTypeFromTypeNode(node.falseType),
+                    isDistributive: !!(checkType.flags & 65536 /* TypeParameter */),
+                    inferTypeParameters: getInferTypeParameters(node),
+                    outerTypeParameters: outerTypeParameters,
+                    instantiations: undefined,
+                    aliasSymbol: aliasSymbol,
+                    aliasTypeArguments: aliasTypeArguments
+                };
+                links.resolvedType = getConditionalType(root, /*mapper*/ undefined);
+                if (outerTypeParameters) {
+                    root.instantiations = ts.createMap();
+                    root.instantiations.set(getTypeListId(outerTypeParameters), links.resolvedType);
+                }
+            }
+            return links.resolvedType;
+        }
+        function getTypeFromInferTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = getDeclaredTypeOfTypeParameter(getSymbolOfNode(node.typeParameter));
+            }
+            return links.resolvedType;
+        }
+        function getIdentifierChain(node) {
+            if (ts.isIdentifier(node)) {
+                return [node];
+            }
+            else {
+                return ts.append(getIdentifierChain(node.left), node.right);
+            }
+        }
+        function getTypeFromImportTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                if (node.isTypeOf && node.typeArguments) { // Only the non-typeof form can make use of type arguments
+                    error(node, ts.Diagnostics.Type_arguments_cannot_be_used_here);
+                    links.resolvedSymbol = unknownSymbol;
+                    return links.resolvedType = errorType;
+                }
+                if (!ts.isLiteralImportTypeNode(node)) {
+                    error(node.argument, ts.Diagnostics.String_literal_expected);
+                    links.resolvedSymbol = unknownSymbol;
+                    return links.resolvedType = errorType;
+                }
+                var argumentType = getTypeFromTypeNode(node.argument);
+                var targetMeaning = node.isTypeOf ? 67216319 /* Value */ : 67901928 /* Type */;
+                // TODO: Future work: support unions/generics/whatever via a deferred import-type
+                var moduleName = argumentType.value;
+                var innerModuleSymbol = resolveExternalModule(node, moduleName, ts.Diagnostics.Cannot_find_module_0, node, /*isForAugmentation*/ false);
+                if (!innerModuleSymbol) {
+                    links.resolvedSymbol = unknownSymbol;
+                    return links.resolvedType = errorType;
+                }
+                var moduleSymbol_1 = resolveExternalModuleSymbol(innerModuleSymbol, /*dontResolveAlias*/ false);
+                if (!ts.nodeIsMissing(node.qualifier)) {
+                    var nameStack = getIdentifierChain(node.qualifier);
+                    var currentNamespace = moduleSymbol_1;
+                    var current = void 0;
+                    while (current = nameStack.shift()) {
+                        var meaning = nameStack.length ? 1920 /* Namespace */ : targetMeaning;
+                        var next = getSymbol(getExportsOfSymbol(getMergedSymbol(resolveSymbol(currentNamespace))), current.escapedText, meaning);
+                        if (!next) {
+                            error(current, ts.Diagnostics.Namespace_0_has_no_exported_member_1, getFullyQualifiedName(currentNamespace), ts.declarationNameToString(current));
+                            return links.resolvedType = errorType;
+                        }
+                        getNodeLinks(current).resolvedSymbol = next;
+                        getNodeLinks(current.parent).resolvedSymbol = next;
+                        currentNamespace = next;
+                    }
+                    resolveImportSymbolType(node, links, currentNamespace, targetMeaning);
+                }
+                else {
+                    if (moduleSymbol_1.flags & targetMeaning) {
+                        resolveImportSymbolType(node, links, moduleSymbol_1, targetMeaning);
+                    }
+                    else {
+                        error(node, targetMeaning === 67216319 /* Value */ ? ts.Diagnostics.Module_0_does_not_refer_to_a_value_but_is_used_as_a_value_here : ts.Diagnostics.Module_0_does_not_refer_to_a_type_but_is_used_as_a_type_here, moduleName);
+                        links.resolvedSymbol = unknownSymbol;
+                        links.resolvedType = errorType;
+                    }
+                }
+            }
+            return links.resolvedType; // TODO: GH#18217
+        }
+        function resolveImportSymbolType(node, links, symbol, meaning) {
+            var resolvedSymbol = resolveSymbol(symbol);
+            links.resolvedSymbol = resolvedSymbol;
+            if (meaning === 67216319 /* Value */) {
+                return links.resolvedType = getTypeOfSymbol(symbol); // intentionally doesn't use resolved symbol so type is cached as expected on the alias
+            }
+            else {
+                return links.resolvedType = getTypeReferenceType(node, resolvedSymbol); // getTypeReferenceType doesn't handle aliases - it must get the resolved symbol
+            }
+        }
+        function getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                // Deferred resolution of members is handled by resolveObjectTypeMembers
+                var aliasSymbol = getAliasSymbolForTypeNode(node);
+                if (getMembersOfSymbol(node.symbol).size === 0 && !aliasSymbol) {
+                    links.resolvedType = emptyTypeLiteralType;
+                }
+                else {
+                    var type = createObjectType(16 /* Anonymous */, node.symbol);
+                    type.aliasSymbol = aliasSymbol;
+                    type.aliasTypeArguments = getTypeArgumentsForAliasSymbol(aliasSymbol);
+                    if (ts.isJSDocTypeLiteral(node) && node.isArrayType) {
+                        type = createArrayType(type);
+                    }
+                    links.resolvedType = type;
+                }
+            }
+            return links.resolvedType;
+        }
+        function getAliasSymbolForTypeNode(node) {
+            return ts.isTypeAlias(node.parent) ? getSymbolOfNode(node.parent) : undefined;
+        }
+        function getTypeArgumentsForAliasSymbol(symbol) {
+            return symbol ? getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol) : undefined;
+        }
+        /**
+         * Since the source of spread types are object literals, which are not binary,
+         * this function should be called in a left folding style, with left = previous result of getSpreadType
+         * and right = the new element to be spread.
+         */
+        function getSpreadType(left, right, symbol, typeFlags, objectFlags) {
+            if (left.flags & 1 /* Any */ || right.flags & 1 /* Any */) {
+                return anyType;
+            }
+            if (left.flags & 2 /* Unknown */ || right.flags & 2 /* Unknown */) {
+                return unknownType;
+            }
+            if (left.flags & 32768 /* Never */) {
+                return right;
+            }
+            if (right.flags & 32768 /* Never */) {
+                return left;
+            }
+            if (left.flags & 262144 /* Union */) {
+                return mapType(left, function (t) { return getSpreadType(t, right, symbol, typeFlags, objectFlags); });
+            }
+            if (right.flags & 262144 /* Union */) {
+                return mapType(right, function (t) { return getSpreadType(left, t, symbol, typeFlags, objectFlags); });
+            }
+            if (right.flags & (272 /* BooleanLike */ | 168 /* NumberLike */ | 68 /* StringLike */ | 544 /* EnumLike */ | 16777216 /* NonPrimitive */ | 1048576 /* Index */)) {
+                return left;
+            }
+            var members = ts.createSymbolTable();
+            var skippedPrivateMembers = ts.createUnderscoreEscapedMap();
+            var stringIndexInfo;
+            var numberIndexInfo;
+            if (left === emptyObjectType) {
+                // for the first spread element, left === emptyObjectType, so take the right's string indexer
+                stringIndexInfo = getIndexInfoOfType(right, 0 /* String */);
+                numberIndexInfo = getIndexInfoOfType(right, 1 /* Number */);
+            }
+            else {
+                stringIndexInfo = unionSpreadIndexInfos(getIndexInfoOfType(left, 0 /* String */), getIndexInfoOfType(right, 0 /* String */));
+                numberIndexInfo = unionSpreadIndexInfos(getIndexInfoOfType(left, 1 /* Number */), getIndexInfoOfType(right, 1 /* Number */));
+            }
+            for (var _i = 0, _a = getPropertiesOfType(right); _i < _a.length; _i++) {
+                var rightProp = _a[_i];
+                // we approximate own properties as non-methods plus methods that are inside the object literal
+                var isSetterWithoutGetter = rightProp.flags & 65536 /* SetAccessor */ && !(rightProp.flags & 32768 /* GetAccessor */);
+                if (ts.getDeclarationModifierFlagsFromSymbol(rightProp) & (8 /* Private */ | 16 /* Protected */)) {
+                    skippedPrivateMembers.set(rightProp.escapedName, true);
+                }
+                else if (!isClassMethod(rightProp) && !isSetterWithoutGetter) {
+                    members.set(rightProp.escapedName, getNonReadonlySymbol(rightProp));
+                }
+            }
+            for (var _b = 0, _c = getPropertiesOfType(left); _b < _c.length; _b++) {
+                var leftProp = _c[_b];
+                if (leftProp.flags & 65536 /* SetAccessor */ && !(leftProp.flags & 32768 /* GetAccessor */)
+                    || skippedPrivateMembers.has(leftProp.escapedName)
+                    || isClassMethod(leftProp)) {
+                    continue;
+                }
+                if (members.has(leftProp.escapedName)) {
+                    var rightProp = members.get(leftProp.escapedName);
+                    var rightType = getTypeOfSymbol(rightProp);
+                    if (rightProp.flags & 16777216 /* Optional */) {
+                        var declarations = ts.concatenate(leftProp.declarations, rightProp.declarations);
+                        var flags = 4 /* Property */ | (leftProp.flags & 16777216 /* Optional */);
+                        var result = createSymbol(flags, leftProp.escapedName);
+                        result.type = getUnionType([getTypeOfSymbol(leftProp), getTypeWithFacts(rightType, 131072 /* NEUndefined */)]);
+                        result.leftSpread = leftProp;
+                        result.rightSpread = rightProp;
+                        result.declarations = declarations;
+                        result.nameType = leftProp.nameType;
+                        members.set(leftProp.escapedName, result);
+                    }
+                }
+                else {
+                    members.set(leftProp.escapedName, getNonReadonlySymbol(leftProp));
+                }
+            }
+            var spread = createAnonymousType(symbol, members, ts.emptyArray, ts.emptyArray, getNonReadonlyIndexSignature(stringIndexInfo), getNonReadonlyIndexSignature(numberIndexInfo));
+            spread.flags |= typeFlags | 268435456 /* ContainsObjectLiteral */;
+            spread.objectFlags |= objectFlags | (128 /* ObjectLiteral */ | 1024 /* ContainsSpread */);
+            return spread;
+        }
+        function getNonReadonlySymbol(prop) {
+            if (!isReadonlySymbol(prop)) {
+                return prop;
+            }
+            var flags = 4 /* Property */ | (prop.flags & 16777216 /* Optional */);
+            var result = createSymbol(flags, prop.escapedName);
+            result.type = getTypeOfSymbol(prop);
+            result.declarations = prop.declarations;
+            result.nameType = prop.nameType;
+            result.syntheticOrigin = prop;
+            return result;
+        }
+        function getNonReadonlyIndexSignature(index) {
+            if (index && index.isReadonly) {
+                return createIndexInfo(index.type, /*isReadonly*/ false, index.declaration);
+            }
+            return index;
+        }
+        function isClassMethod(prop) {
+            return prop.flags & 8192 /* Method */ && ts.find(prop.declarations, function (decl) { return ts.isClassLike(decl.parent); });
+        }
+        function createLiteralType(flags, value, symbol) {
+            var type = createType(flags);
+            type.symbol = symbol;
+            type.value = value;
+            return type;
+        }
+        function getFreshTypeOfLiteralType(type) {
+            if (type.flags & 192 /* StringOrNumberLiteral */ && !(type.flags & 33554432 /* FreshLiteral */)) {
+                if (!type.freshType) {
+                    var freshType = createLiteralType(type.flags | 33554432 /* FreshLiteral */, type.value, type.symbol);
+                    freshType.regularType = type;
+                    type.freshType = freshType;
+                }
+                return type.freshType;
+            }
+            return type;
+        }
+        function getRegularTypeOfLiteralType(type) {
+            return type.flags & 192 /* StringOrNumberLiteral */ && type.flags & 33554432 /* FreshLiteral */ ? type.regularType :
+                type.flags & 262144 /* Union */ ? getUnionType(ts.sameMap(type.types, getRegularTypeOfLiteralType)) :
+                    type;
+        }
+        function getLiteralType(value, enumId, symbol) {
+            // We store all literal types in a single map with keys of the form '#NNN' and '@SSS',
+            // where NNN is the text representation of a numeric literal and SSS are the characters
+            // of a string literal. For literal enum members we use 'EEE#NNN' and 'EEE@SSS', where
+            // EEE is a unique id for the containing enum type.
+            var qualifier = typeof value === "number" ? "#" : "@";
+            var key = enumId ? enumId + qualifier + value : qualifier + value;
+            var type = literalTypes.get(key);
+            if (!type) {
+                var flags = (typeof value === "number" ? 128 /* NumberLiteral */ : 64 /* StringLiteral */) | (enumId ? 512 /* EnumLiteral */ : 0);
+                literalTypes.set(key, type = createLiteralType(flags, value, symbol));
+            }
+            return type;
+        }
+        function getTypeFromLiteralTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = getRegularTypeOfLiteralType(checkExpression(node.literal));
+            }
+            return links.resolvedType;
+        }
+        function createUniqueESSymbolType(symbol) {
+            var type = createType(2048 /* UniqueESSymbol */);
+            type.symbol = symbol;
+            return type;
+        }
+        function getESSymbolLikeTypeForNode(node) {
+            if (ts.isValidESSymbolDeclaration(node)) {
+                var symbol = getSymbolOfNode(node);
+                var links = getSymbolLinks(symbol);
+                return links.uniqueESSymbolType || (links.uniqueESSymbolType = createUniqueESSymbolType(symbol));
+            }
+            return esSymbolType;
+        }
+        function getThisType(node) {
+            var container = ts.getThisContainer(node, /*includeArrowFunctions*/ false);
+            var parent = container && container.parent;
+            if (parent && (ts.isClassLike(parent) || parent.kind === 236 /* InterfaceDeclaration */)) {
+                if (!ts.hasModifier(container, 32 /* Static */) &&
+                    (container.kind !== 155 /* Constructor */ || ts.isNodeDescendantOf(node, container.body))) {
+                    return getDeclaredTypeOfClassOrInterface(getSymbolOfNode(parent)).thisType;
+                }
+            }
+            error(node, ts.Diagnostics.A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface);
+            return errorType;
+        }
+        function getTypeFromThisTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = getThisType(node);
+            }
+            return links.resolvedType;
+        }
+        function getTypeFromTypeNode(node) {
+            switch (node.kind) {
+                case 119 /* AnyKeyword */:
+                case 279 /* JSDocAllType */:
+                case 280 /* JSDocUnknownType */:
+                    return anyType;
+                case 142 /* UnknownKeyword */:
+                    return unknownType;
+                case 137 /* StringKeyword */:
+                    return stringType;
+                case 134 /* NumberKeyword */:
+                    return numberType;
+                case 122 /* BooleanKeyword */:
+                    return booleanType;
+                case 138 /* SymbolKeyword */:
+                    return esSymbolType;
+                case 105 /* VoidKeyword */:
+                    return voidType;
+                case 140 /* UndefinedKeyword */:
+                    return undefinedType;
+                case 95 /* NullKeyword */:
+                    return nullType;
+                case 131 /* NeverKeyword */:
+                    return neverType;
+                case 135 /* ObjectKeyword */:
+                    return node.flags & 65536 /* JavaScriptFile */ ? anyType : nonPrimitiveType;
+                case 174 /* ThisType */:
+                case 99 /* ThisKeyword */:
+                    return getTypeFromThisTypeNode(node);
+                case 178 /* LiteralType */:
+                    return getTypeFromLiteralTypeNode(node);
+                case 162 /* TypeReference */:
+                    return getTypeFromTypeReference(node);
+                case 161 /* TypePredicate */:
+                    return booleanType;
+                case 207 /* ExpressionWithTypeArguments */:
+                    return getTypeFromTypeReference(node);
+                case 165 /* TypeQuery */:
+                    return getTypeFromTypeQueryNode(node);
+                case 167 /* ArrayType */:
+                    return getTypeFromArrayTypeNode(node);
+                case 168 /* TupleType */:
+                    return getTypeFromTupleTypeNode(node);
+                case 169 /* UnionType */:
+                    return getTypeFromUnionTypeNode(node);
+                case 170 /* IntersectionType */:
+                    return getTypeFromIntersectionTypeNode(node);
+                case 281 /* JSDocNullableType */:
+                    return getTypeFromJSDocNullableTypeNode(node);
+                case 283 /* JSDocOptionalType */:
+                    return addOptionality(getTypeFromTypeNode(node.type));
+                case 173 /* ParenthesizedType */:
+                case 282 /* JSDocNonNullableType */:
+                case 278 /* JSDocTypeExpression */:
+                    return getTypeFromTypeNode(node.type);
+                case 285 /* JSDocVariadicType */:
+                    return getTypeFromJSDocVariadicType(node);
+                case 163 /* FunctionType */:
+                case 164 /* ConstructorType */:
+                case 166 /* TypeLiteral */:
+                case 287 /* JSDocTypeLiteral */:
+                case 284 /* JSDocFunctionType */:
+                case 288 /* JSDocSignature */:
+                    return getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node);
+                case 175 /* TypeOperator */:
+                    return getTypeFromTypeOperatorNode(node);
+                case 176 /* IndexedAccessType */:
+                    return getTypeFromIndexedAccessTypeNode(node);
+                case 177 /* MappedType */:
+                    return getTypeFromMappedTypeNode(node);
+                case 171 /* ConditionalType */:
+                    return getTypeFromConditionalTypeNode(node);
+                case 172 /* InferType */:
+                    return getTypeFromInferTypeNode(node);
+                case 179 /* ImportType */:
+                    return getTypeFromImportTypeNode(node);
+                // This function assumes that an identifier or qualified name is a type expression
+                // Callers should first ensure this by calling isTypeNode
+                case 71 /* Identifier */:
+                case 146 /* QualifiedName */:
+                    var symbol = getSymbolAtLocation(node);
+                    return (symbol && getDeclaredTypeOfSymbol(symbol)); // TODO: GH#18217
+                default:
+                    return errorType;
+            }
+        }
+        function instantiateList(items, mapper, instantiator) {
+            if (items && items.length) {
+                for (var i = 0; i < items.length; i++) {
+                    var item = items[i];
+                    var mapped = instantiator(item, mapper);
+                    if (item !== mapped) {
+                        var result = i === 0 ? [] : items.slice(0, i);
+                        result.push(mapped);
+                        for (i++; i < items.length; i++) {
+                            result.push(instantiator(items[i], mapper));
+                        }
+                        return result;
+                    }
+                }
+            }
+            return items;
+        }
+        function instantiateTypes(types, mapper) {
+            return instantiateList(types, mapper, instantiateType);
+        }
+        function instantiateSignatures(signatures, mapper) {
+            return instantiateList(signatures, mapper, instantiateSignature);
+        }
+        function makeUnaryTypeMapper(source, target) {
+            return function (t) { return t === source ? target : t; };
+        }
+        function makeBinaryTypeMapper(source1, target1, source2, target2) {
+            return function (t) { return t === source1 ? target1 : t === source2 ? target2 : t; };
+        }
+        function makeArrayTypeMapper(sources, targets) {
+            return function (t) {
+                for (var i = 0; i < sources.length; i++) {
+                    if (t === sources[i]) {
+                        return targets ? targets[i] : anyType;
+                    }
+                }
+                return t;
+            };
+        }
+        function createTypeMapper(sources, targets) {
+            ts.Debug.assert(targets === undefined || sources.length === targets.length);
+            return sources.length === 1 ? makeUnaryTypeMapper(sources[0], targets ? targets[0] : anyType) :
+                sources.length === 2 ? makeBinaryTypeMapper(sources[0], targets ? targets[0] : anyType, sources[1], targets ? targets[1] : anyType) :
+                    makeArrayTypeMapper(sources, targets);
+        }
+        function createTypeEraser(sources) {
+            return createTypeMapper(sources, /*targets*/ undefined);
+        }
+        /**
+         * Maps forward-references to later types parameters to the empty object type.
+         * This is used during inference when instantiating type parameter defaults.
+         */
+        function createBackreferenceMapper(typeParameters, index) {
+            return function (t) { return typeParameters.indexOf(t) >= index ? emptyObjectType : t; };
+        }
+        function isInferenceContext(mapper) {
+            return !!mapper.typeParameters;
+        }
+        function cloneTypeMapper(mapper) {
+            return mapper && isInferenceContext(mapper) ?
+                createInferenceContext(mapper.typeParameters, mapper.signature, mapper.flags | 2 /* NoDefault */, mapper.compareTypes, mapper.inferences) :
+                mapper;
+        }
+        function combineTypeMappers(mapper1, mapper2) {
+            if (!mapper1)
+                return mapper2;
+            if (!mapper2)
+                return mapper1;
+            return function (t) { return instantiateType(mapper1(t), mapper2); };
+        }
+        function createReplacementMapper(source, target, baseMapper) {
+            return function (t) { return t === source ? target : baseMapper(t); };
+        }
+        function wildcardMapper(type) {
+            return type.flags & 65536 /* TypeParameter */ ? wildcardType : type;
+        }
+        function cloneTypeParameter(typeParameter) {
+            var result = createType(65536 /* TypeParameter */);
+            result.symbol = typeParameter.symbol;
+            result.target = typeParameter;
+            return result;
+        }
+        function instantiateTypePredicate(predicate, mapper) {
+            if (ts.isIdentifierTypePredicate(predicate)) {
+                return {
+                    kind: 1 /* Identifier */,
+                    parameterName: predicate.parameterName,
+                    parameterIndex: predicate.parameterIndex,
+                    type: instantiateType(predicate.type, mapper)
+                };
+            }
+            else {
+                return {
+                    kind: 0 /* This */,
+                    type: instantiateType(predicate.type, mapper)
+                };
+            }
+        }
+        function instantiateSignature(signature, mapper, eraseTypeParameters) {
+            var freshTypeParameters;
+            if (signature.typeParameters && !eraseTypeParameters) {
+                // First create a fresh set of type parameters, then include a mapping from the old to the
+                // new type parameters in the mapper function. Finally store this mapper in the new type
+                // parameters such that we can use it when instantiating constraints.
+                freshTypeParameters = ts.map(signature.typeParameters, cloneTypeParameter);
+                mapper = combineTypeMappers(createTypeMapper(signature.typeParameters, freshTypeParameters), mapper);
+                for (var _i = 0, freshTypeParameters_1 = freshTypeParameters; _i < freshTypeParameters_1.length; _i++) {
+                    var tp = freshTypeParameters_1[_i];
+                    tp.mapper = mapper;
+                }
+            }
+            // Don't compute resolvedReturnType and resolvedTypePredicate now,
+            // because using `mapper` now could trigger inferences to become fixed. (See `createInferenceContext`.)
+            // See GH#17600.
+            var result = createSignature(signature.declaration, freshTypeParameters, signature.thisParameter && instantiateSymbol(signature.thisParameter, mapper), instantiateList(signature.parameters, mapper, instantiateSymbol), 
+            /*resolvedReturnType*/ undefined, 
+            /*resolvedTypePredicate*/ undefined, signature.minArgumentCount, signature.hasRestParameter, signature.hasLiteralTypes);
+            result.target = signature;
+            result.mapper = mapper;
+            return result;
+        }
+        function instantiateSymbol(symbol, mapper) {
+            var links = getSymbolLinks(symbol);
+            if (links.type && !maybeTypeOfKind(links.type, 131072 /* Object */ | 15794176 /* Instantiable */)) {
+                // If the type of the symbol is already resolved, and if that type could not possibly
+                // be affected by instantiation, simply return the symbol itself.
+                return symbol;
+            }
+            if (ts.getCheckFlags(symbol) & 1 /* Instantiated */) {
+                // If symbol being instantiated is itself a instantiation, fetch the original target and combine the
+                // type mappers. This ensures that original type identities are properly preserved and that aliases
+                // always reference a non-aliases.
+                symbol = links.target;
+                mapper = combineTypeMappers(links.mapper, mapper);
+            }
+            // Keep the flags from the symbol we're instantiating.  Mark that is instantiated, and
+            // also transient so that we can just store data on it directly.
+            var result = createSymbol(symbol.flags, symbol.escapedName, 1 /* Instantiated */ | (ts.getCheckFlags(symbol) & 1024 /* Late */));
+            result.declarations = symbol.declarations;
+            result.parent = symbol.parent;
+            result.target = symbol;
+            result.mapper = mapper;
+            if (symbol.valueDeclaration) {
+                result.valueDeclaration = symbol.valueDeclaration;
+            }
+            if (symbol.nameType) {
+                result.nameType = symbol.nameType;
+            }
+            if (isTransientSymbol(symbol)) {
+                if (symbol.isRestParameter) {
+                    result.isRestParameter = symbol.isRestParameter;
+                }
+            }
+            return result;
+        }
+        function getAnonymousTypeInstantiation(type, mapper) {
+            var target = type.objectFlags & 64 /* Instantiated */ ? type.target : type;
+            var symbol = target.symbol;
+            var links = getSymbolLinks(symbol);
+            var typeParameters = links.outerTypeParameters;
+            if (!typeParameters) {
+                // The first time an anonymous type is instantiated we compute and store a list of the type
+                // parameters that are in scope (and therefore potentially referenced). For type literals that
+                // aren't the right hand side of a generic type alias declaration we optimize by reducing the
+                // set of type parameters to those that are possibly referenced in the literal.
+                var declaration_1 = symbol.declarations[0];
+                if (ts.isInJavaScriptFile(declaration_1)) {
+                    var paramTag = ts.findAncestor(declaration_1, ts.isJSDocParameterTag);
+                    if (paramTag) {
+                        var paramSymbol = ts.getParameterSymbolFromJSDoc(paramTag);
+                        if (paramSymbol) {
+                            declaration_1 = paramSymbol.valueDeclaration;
+                        }
+                    }
+                }
+                var outerTypeParameters = getOuterTypeParameters(declaration_1, /*includeThisTypes*/ true);
+                if (isJavaScriptConstructor(declaration_1)) {
+                    var templateTagParameters = getTypeParametersFromDeclaration(declaration_1);
+                    outerTypeParameters = ts.addRange(outerTypeParameters, templateTagParameters);
+                }
+                typeParameters = outerTypeParameters || ts.emptyArray;
+                typeParameters = symbol.flags & 2048 /* TypeLiteral */ && !target.aliasTypeArguments ?
+                    ts.filter(typeParameters, function (tp) { return isTypeParameterPossiblyReferenced(tp, declaration_1); }) :
+                    typeParameters;
+                links.outerTypeParameters = typeParameters;
+                if (typeParameters.length) {
+                    links.instantiations = ts.createMap();
+                    links.instantiations.set(getTypeListId(typeParameters), target);
+                }
+            }
+            if (typeParameters.length) {
+                // We are instantiating an anonymous type that has one or more type parameters in scope. Apply the
+                // mapper to the type parameters to produce the effective list of type arguments, and compute the
+                // instantiation cache key from the type IDs of the type arguments.
+                var combinedMapper = type.objectFlags & 64 /* Instantiated */ ? combineTypeMappers(type.mapper, mapper) : mapper;
+                var typeArguments = ts.map(typeParameters, combinedMapper);
+                var id = getTypeListId(typeArguments);
+                var result = links.instantiations.get(id);
+                if (!result) {
+                    var newMapper = createTypeMapper(typeParameters, typeArguments);
+                    result = target.objectFlags & 32 /* Mapped */ ? instantiateMappedType(target, newMapper) : instantiateAnonymousType(target, newMapper);
+                    links.instantiations.set(id, result);
+                }
+                return result;
+            }
+            return type;
+        }
+        function maybeTypeParameterReference(node) {
+            return !(node.kind === 146 /* QualifiedName */ ||
+                node.parent.kind === 162 /* TypeReference */ && node.parent.typeArguments && node === node.parent.typeName);
+        }
+        function isTypeParameterPossiblyReferenced(tp, node) {
+            // If the type parameter doesn't have exactly one declaration, if there are invening statement blocks
+            // between the node and the type parameter declaration, if the node contains actual references to the
+            // type parameter, or if the node contains type queries, we consider the type parameter possibly referenced.
+            if (tp.symbol && tp.symbol.declarations && tp.symbol.declarations.length === 1) {
+                var container_3 = tp.symbol.declarations[0].parent;
+                if (ts.findAncestor(node, function (n) { return n.kind === 213 /* Block */ ? "quit" : n === container_3; })) {
+                    return !!ts.forEachChild(node, containsReference);
+                }
+            }
+            return true;
+            function containsReference(node) {
+                switch (node.kind) {
+                    case 174 /* ThisType */:
+                        return !!tp.isThisType;
+                    case 71 /* Identifier */:
+                        return !tp.isThisType && ts.isPartOfTypeNode(node) && maybeTypeParameterReference(node) &&
+                            getTypeFromTypeNode(node) === tp;
+                    case 165 /* TypeQuery */:
+                        return true;
+                }
+                return !!ts.forEachChild(node, containsReference);
+            }
+        }
+        function instantiateMappedType(type, mapper) {
+            // Check if we have a homomorphic mapped type, i.e. a type of the form { [P in keyof T]: X } for some
+            // type variable T. If so, the mapped type is distributive over a union type and when T is instantiated
+            // to a union type A | B, we produce { [P in keyof A]: X } | { [P in keyof B]: X }. Furthermore, for
+            // homomorphic mapped types we leave primitive types alone. For example, when T is instantiated to a
+            // union type A | undefined, we produce { [P in keyof A]: X } | undefined.
+            var constraintType = getConstraintTypeFromMappedType(type);
+            if (constraintType.flags & 1048576 /* Index */) {
+                var typeVariable_1 = constraintType.type;
+                if (typeVariable_1.flags & 65536 /* TypeParameter */) {
+                    var mappedTypeVariable = instantiateType(typeVariable_1, mapper);
+                    if (typeVariable_1 !== mappedTypeVariable) {
+                        return mapType(mappedTypeVariable, function (t) {
+                            if (isMappableType(t)) {
+                                return instantiateAnonymousType(type, createReplacementMapper(typeVariable_1, t, mapper));
+                            }
+                            return t;
+                        });
+                    }
+                }
+            }
+            return instantiateAnonymousType(type, mapper);
+        }
+        function isMappableType(type) {
+            return type.flags & (3 /* AnyOrUnknown */ | 14745600 /* InstantiableNonPrimitive */ | 131072 /* Object */ | 524288 /* Intersection */);
+        }
+        function instantiateAnonymousType(type, mapper) {
+            var result = createObjectType(type.objectFlags | 64 /* Instantiated */, type.symbol);
+            if (type.objectFlags & 32 /* Mapped */) {
+                result.declaration = type.declaration;
+            }
+            result.target = type;
+            result.mapper = mapper;
+            result.aliasSymbol = type.aliasSymbol;
+            result.aliasTypeArguments = instantiateTypes(type.aliasTypeArguments, mapper);
+            return result;
+        }
+        function getConditionalTypeInstantiation(type, mapper) {
+            var root = type.root;
+            if (root.outerTypeParameters) {
+                // We are instantiating a conditional type that has one or more type parameters in scope. Apply the
+                // mapper to the type parameters to produce the effective list of type arguments, and compute the
+                // instantiation cache key from the type IDs of the type arguments.
+                var typeArguments = ts.map(root.outerTypeParameters, mapper);
+                var id = getTypeListId(typeArguments);
+                var result = root.instantiations.get(id);
+                if (!result) {
+                    var newMapper = createTypeMapper(root.outerTypeParameters, typeArguments);
+                    result = instantiateConditionalType(root, newMapper);
+                    root.instantiations.set(id, result);
+                }
+                return result;
+            }
+            return type;
+        }
+        function instantiateConditionalType(root, mapper) {
+            // Check if we have a conditional type where the check type is a naked type parameter. If so,
+            // the conditional type is distributive over union types and when T is instantiated to a union
+            // type A | B, we produce (A extends U ? X : Y) | (B extends U ? X : Y).
+            if (root.isDistributive) {
+                var checkType_1 = root.checkType;
+                var instantiatedType = mapper(checkType_1);
+                if (checkType_1 !== instantiatedType && instantiatedType.flags & (262144 /* Union */ | 32768 /* Never */)) {
+                    return mapType(instantiatedType, function (t) { return getConditionalType(root, createReplacementMapper(checkType_1, t, mapper)); });
+                }
+            }
+            return getConditionalType(root, mapper);
+        }
+        function instantiateType(type, mapper) {
+            if (type && mapper && mapper !== identityMapper) {
+                if (type.flags & 65536 /* TypeParameter */) {
+                    return mapper(type);
+                }
+                if (type.flags & 131072 /* Object */) {
+                    if (type.objectFlags & 16 /* Anonymous */) {
+                        // If the anonymous type originates in a declaration of a function, method, class, or
+                        // interface, in an object type literal, or in an object literal expression, we may need
+                        // to instantiate the type because it might reference a type parameter.
+                        return type.symbol && type.symbol.flags & (16 /* Function */ | 8192 /* Method */ | 32 /* Class */ | 2048 /* TypeLiteral */ | 4096 /* ObjectLiteral */) && type.symbol.declarations ?
+                            getAnonymousTypeInstantiation(type, mapper) : type;
+                    }
+                    if (type.objectFlags & 32 /* Mapped */) {
+                        return getAnonymousTypeInstantiation(type, mapper);
+                    }
+                    if (type.objectFlags & 4 /* Reference */) {
+                        var typeArguments = type.typeArguments;
+                        var newTypeArguments = instantiateTypes(typeArguments, mapper);
+                        return newTypeArguments !== typeArguments ? createTypeReference(type.target, newTypeArguments) : type;
+                    }
+                }
+                if (type.flags & 262144 /* Union */ && !(type.flags & 32764 /* Primitive */)) {
+                    var types = type.types;
+                    var newTypes = instantiateTypes(types, mapper);
+                    return newTypes !== types ? getUnionType(newTypes, 1 /* Literal */, type.aliasSymbol, instantiateTypes(type.aliasTypeArguments, mapper)) : type;
+                }
+                if (type.flags & 524288 /* Intersection */) {
+                    var types = type.types;
+                    var newTypes = instantiateTypes(types, mapper);
+                    return newTypes !== types ? getIntersectionType(newTypes, type.aliasSymbol, instantiateTypes(type.aliasTypeArguments, mapper)) : type;
+                }
+                if (type.flags & 1048576 /* Index */) {
+                    return getIndexType(instantiateType(type.type, mapper));
+                }
+                if (type.flags & 2097152 /* IndexedAccess */) {
+                    return getIndexedAccessType(instantiateType(type.objectType, mapper), instantiateType(type.indexType, mapper));
+                }
+                if (type.flags & 4194304 /* Conditional */) {
+                    return getConditionalTypeInstantiation(type, combineTypeMappers(type.mapper, mapper));
+                }
+                if (type.flags & 8388608 /* Substitution */) {
+                    return instantiateType(type.typeVariable, mapper);
+                }
+            }
+            return type;
+        }
+        function getWildcardInstantiation(type) {
+            return type.flags & (32764 /* Primitive */ | 3 /* AnyOrUnknown */ | 32768 /* Never */) ? type :
+                type.wildcardInstantiation || (type.wildcardInstantiation = instantiateType(type, wildcardMapper));
+        }
+        function instantiateIndexInfo(info, mapper) {
+            return info && createIndexInfo(instantiateType(info.type, mapper), info.isReadonly, info.declaration);
+        }
+        // Returns true if the given expression contains (at any level of nesting) a function or arrow expression
+        // that is subject to contextual typing.
+        function isContextSensitive(node) {
+            ts.Debug.assert(node.kind !== 154 /* MethodDeclaration */ || ts.isObjectLiteralMethod(node));
+            switch (node.kind) {
+                case 192 /* FunctionExpression */:
+                case 193 /* ArrowFunction */:
+                case 154 /* MethodDeclaration */:
+                    return isContextSensitiveFunctionLikeDeclaration(node);
+                case 184 /* ObjectLiteralExpression */:
+                    return ts.some(node.properties, isContextSensitive);
+                case 183 /* ArrayLiteralExpression */:
+                    return ts.some(node.elements, isContextSensitive);
+                case 201 /* ConditionalExpression */:
+                    return isContextSensitive(node.whenTrue) ||
+                        isContextSensitive(node.whenFalse);
+                case 200 /* BinaryExpression */:
+                    return node.operatorToken.kind === 54 /* BarBarToken */ &&
+                        (isContextSensitive(node.left) || isContextSensitive(node.right));
+                case 270 /* PropertyAssignment */:
+                    return isContextSensitive(node.initializer);
+                case 191 /* ParenthesizedExpression */:
+                    return isContextSensitive(node.expression);
+                case 263 /* JsxAttributes */:
+                    return ts.some(node.properties, isContextSensitive);
+                case 262 /* JsxAttribute */: {
+                    // If there is no initializer, JSX attribute has a boolean value of true which is not context sensitive.
+                    var initializer = node.initializer;
+                    return !!initializer && isContextSensitive(initializer);
+                }
+                case 265 /* JsxExpression */: {
+                    // It is possible to that node.expression is undefined (e.g <div x={} />)
+                    var expression = node.expression;
+                    return !!expression && isContextSensitive(expression);
+                }
+            }
+            return false;
+        }
+        function isContextSensitiveFunctionLikeDeclaration(node) {
+            // Functions with type parameters are not context sensitive.
+            if (node.typeParameters) {
+                return false;
+            }
+            // Functions with any parameters that lack type annotations are context sensitive.
+            if (ts.some(node.parameters, function (p) { return !ts.getEffectiveTypeAnnotationNode(p); })) {
+                return true;
+            }
+            if (node.kind !== 193 /* ArrowFunction */) {
+                // If the first parameter is not an explicit 'this' parameter, then the function has
+                // an implicit 'this' parameter which is subject to contextual typing.
+                var parameter = ts.firstOrUndefined(node.parameters);
+                if (!(parameter && ts.parameterIsThisKeyword(parameter))) {
+                    return true;
+                }
+            }
+            // TODO(anhans): A block should be context-sensitive if it has a context-sensitive return value.
+            var body = node.body;
+            return body.kind === 213 /* Block */ ? false : isContextSensitive(body);
+        }
+        function isContextSensitiveFunctionOrObjectLiteralMethod(func) {
+            return (ts.isInJavaScriptFile(func) && ts.isFunctionDeclaration(func) || isFunctionExpressionOrArrowFunction(func) || ts.isObjectLiteralMethod(func)) &&
+                isContextSensitiveFunctionLikeDeclaration(func);
+        }
+        function getTypeWithoutSignatures(type) {
+            if (type.flags & 131072 /* Object */) {
+                var resolved = resolveStructuredTypeMembers(type);
+                if (resolved.constructSignatures.length) {
+                    var result = createObjectType(16 /* Anonymous */, type.symbol);
+                    result.members = resolved.members;
+                    result.properties = resolved.properties;
+                    result.callSignatures = ts.emptyArray;
+                    result.constructSignatures = ts.emptyArray;
+                    return result;
+                }
+            }
+            else if (type.flags & 524288 /* Intersection */) {
+                return getIntersectionType(ts.map(type.types, getTypeWithoutSignatures));
+            }
+            return type;
+        }
+        // TYPE CHECKING
+        function isTypeIdenticalTo(source, target) {
+            return isTypeRelatedTo(source, target, identityRelation);
+        }
+        function compareTypesIdentical(source, target) {
+            return isTypeRelatedTo(source, target, identityRelation) ? -1 /* True */ : 0 /* False */;
+        }
+        function compareTypesAssignable(source, target) {
+            return isTypeRelatedTo(source, target, assignableRelation) ? -1 /* True */ : 0 /* False */;
+        }
+        function isTypeSubtypeOf(source, target) {
+            return isTypeRelatedTo(source, target, subtypeRelation);
+        }
+        function isTypeAssignableTo(source, target) {
+            return isTypeRelatedTo(source, target, assignableRelation);
+        }
+        // An object type S is considered to be derived from an object type T if
+        // S is a union type and every constituent of S is derived from T,
+        // T is a union type and S is derived from at least one constituent of T, or
+        // S is a type variable with a base constraint that is derived from T,
+        // T is one of the global types Object and Function and S is a subtype of T, or
+        // T occurs directly or indirectly in an 'extends' clause of S.
+        // Note that this check ignores type parameters and only considers the
+        // inheritance hierarchy.
+        function isTypeDerivedFrom(source, target) {
+            return source.flags & 262144 /* Union */ ? ts.every(source.types, function (t) { return isTypeDerivedFrom(t, target); }) :
+                target.flags & 262144 /* Union */ ? ts.some(target.types, function (t) { return isTypeDerivedFrom(source, t); }) :
+                    source.flags & 14745600 /* InstantiableNonPrimitive */ ? isTypeDerivedFrom(getBaseConstraintOfType(source) || emptyObjectType, target) :
+                        target === globalObjectType || target === globalFunctionType ? isTypeSubtypeOf(source, target) :
+                            hasBaseType(source, getTargetType(target));
+        }
+        /**
+         * This is *not* a bi-directional relationship.
+         * If one needs to check both directions for comparability, use a second call to this function or 'checkTypeComparableTo'.
+         *
+         * A type S is comparable to a type T if some (but not necessarily all) of the possible values of S are also possible values of T.
+         * It is used to check following cases:
+         *   - the types of the left and right sides of equality/inequality operators (`===`, `!==`, `==`, `!=`).
+         *   - the types of `case` clause expressions and their respective `switch` expressions.
+         *   - the type of an expression in a type assertion with the type being asserted.
+         */
+        function isTypeComparableTo(source, target) {
+            return isTypeRelatedTo(source, target, comparableRelation);
+        }
+        function areTypesComparable(type1, type2) {
+            return isTypeComparableTo(type1, type2) || isTypeComparableTo(type2, type1);
+        }
+        function checkTypeAssignableTo(source, target, errorNode, headMessage, containingMessageChain) {
+            return checkTypeRelatedTo(source, target, assignableRelation, errorNode, headMessage, containingMessageChain);
+        }
+        /**
+         * This is *not* a bi-directional relationship.
+         * If one needs to check both directions for comparability, use a second call to this function or 'isTypeComparableTo'.
+         */
+        function checkTypeComparableTo(source, target, errorNode, headMessage, containingMessageChain) {
+            return checkTypeRelatedTo(source, target, comparableRelation, errorNode, headMessage, containingMessageChain);
+        }
+        function isSignatureAssignableTo(source, target, ignoreReturnTypes) {
+            return compareSignaturesRelated(source, target, 0 /* None */, ignoreReturnTypes, /*reportErrors*/ false, 
+            /*errorReporter*/ undefined, compareTypesAssignable) !== 0 /* False */;
+        }
+        /**
+         * See signatureRelatedTo, compareSignaturesIdentical
+         */
+        function compareSignaturesRelated(source, target, callbackCheck, ignoreReturnTypes, reportErrors, errorReporter, compareTypes) {
+            // TODO (drosen): De-duplicate code between related functions.
+            if (source === target) {
+                return -1 /* True */;
+            }
+            if (!target.hasRestParameter && source.minArgumentCount > target.parameters.length) {
+                return 0 /* False */;
+            }
+            if (source.typeParameters && source.typeParameters !== target.typeParameters) {
+                target = getCanonicalSignature(target);
+                source = instantiateSignatureInContextOf(source, target, /*contextualMapper*/ undefined, compareTypes);
+            }
+            var kind = target.declaration ? target.declaration.kind : 0 /* Unknown */;
+            var strictVariance = !callbackCheck && strictFunctionTypes && kind !== 154 /* MethodDeclaration */ &&
+                kind !== 153 /* MethodSignature */ && kind !== 155 /* Constructor */;
+            var result = -1 /* True */;
+            var sourceThisType = getThisTypeOfSignature(source);
+            if (sourceThisType && sourceThisType !== voidType) {
+                var targetThisType = getThisTypeOfSignature(target);
+                if (targetThisType) {
+                    // void sources are assignable to anything.
+                    var related = !strictVariance && compareTypes(sourceThisType, targetThisType, /*reportErrors*/ false)
+                        || compareTypes(targetThisType, sourceThisType, reportErrors);
+                    if (!related) {
+                        if (reportErrors) {
+                            errorReporter(ts.Diagnostics.The_this_types_of_each_signature_are_incompatible);
+                        }
+                        return 0 /* False */;
+                    }
+                    result &= related;
+                }
+            }
+            var sourceMax = getNumNonRestParameters(source);
+            var targetMax = getNumNonRestParameters(target);
+            var checkCount = getNumParametersToCheckForSignatureRelatability(source, sourceMax, target, targetMax);
+            var sourceParams = source.parameters;
+            var targetParams = target.parameters;
+            for (var i = 0; i < checkCount; i++) {
+                var sourceType = i < sourceMax ? getTypeOfParameter(sourceParams[i]) : getRestTypeOfSignature(source);
+                var targetType = i < targetMax ? getTypeOfParameter(targetParams[i]) : getRestTypeOfSignature(target);
+                // In order to ensure that any generic type Foo<T> is at least co-variant with respect to T no matter
+                // how Foo uses T, we need to relate parameters bi-variantly (given that parameters are input positions,
+                // they naturally relate only contra-variantly). However, if the source and target parameters both have
+                // function types with a single call signature, we know we are relating two callback parameters. In
+                // that case it is sufficient to only relate the parameters of the signatures co-variantly because,
+                // similar to return values, callback parameters are output positions. This means that a Promise<T>,
+                // where T is used only in callback parameter positions, will be co-variant (as opposed to bi-variant)
+                // with respect to T.
+                var sourceSig = callbackCheck ? undefined : getSingleCallSignature(getNonNullableType(sourceType));
+                var targetSig = callbackCheck ? undefined : getSingleCallSignature(getNonNullableType(targetType));
+                var callbacks = sourceSig && targetSig && !signatureHasTypePredicate(sourceSig) && !signatureHasTypePredicate(targetSig) &&
+                    (getFalsyFlags(sourceType) & 24576 /* Nullable */) === (getFalsyFlags(targetType) & 24576 /* Nullable */);
+                var related = callbacks ?
+                    // TODO: GH#18217 It will work if they're both `undefined`, but not if only one is
+                    compareSignaturesRelated(targetSig, sourceSig, strictVariance ? 2 /* Strict */ : 1 /* Bivariant */, /*ignoreReturnTypes*/ false, reportErrors, errorReporter, compareTypes) :
+                    !callbackCheck && !strictVariance && compareTypes(sourceType, targetType, /*reportErrors*/ false) || compareTypes(targetType, sourceType, reportErrors);
+                if (!related) {
+                    if (reportErrors) {
+                        errorReporter(ts.Diagnostics.Types_of_parameters_0_and_1_are_incompatible, ts.symbolName(sourceParams[i < sourceMax ? i : sourceMax]), ts.symbolName(targetParams[i < targetMax ? i : targetMax]));
+                    }
+                    return 0 /* False */;
+                }
+                result &= related;
+            }
+            if (!ignoreReturnTypes) {
+                var targetReturnType = getReturnTypeOfSignature(target);
+                if (targetReturnType === voidType) {
+                    return result;
+                }
+                var sourceReturnType = getReturnTypeOfSignature(source);
+                // The following block preserves behavior forbidding boolean returning functions from being assignable to type guard returning functions
+                var targetTypePredicate = getTypePredicateOfSignature(target);
+                if (targetTypePredicate) {
+                    var sourceTypePredicate = getTypePredicateOfSignature(source);
+                    if (sourceTypePredicate) {
+                        result &= compareTypePredicateRelatedTo(sourceTypePredicate, targetTypePredicate, source.declaration, target.declaration, reportErrors, errorReporter, compareTypes); // TODO: GH#18217
+                    }
+                    else if (ts.isIdentifierTypePredicate(targetTypePredicate)) {
+                        if (reportErrors) {
+                            errorReporter(ts.Diagnostics.Signature_0_must_be_a_type_predicate, signatureToString(source));
+                        }
+                        return 0 /* False */;
+                    }
+                }
+                else {
+                    // When relating callback signatures, we still need to relate return types bi-variantly as otherwise
+                    // the containing type wouldn't be co-variant. For example, interface Foo<T> { add(cb: () => T): void }
+                    // wouldn't be co-variant for T without this rule.
+                    result &= callbackCheck === 1 /* Bivariant */ && compareTypes(targetReturnType, sourceReturnType, /*reportErrors*/ false) ||
+                        compareTypes(sourceReturnType, targetReturnType, reportErrors);
+                }
+            }
+            return result;
+        }
+        function compareTypePredicateRelatedTo(source, target, sourceDeclaration, targetDeclaration, reportErrors, errorReporter, compareTypes) {
+            if (source.kind !== target.kind) {
+                if (reportErrors) {
+                    errorReporter(ts.Diagnostics.A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard);
+                    errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
+                }
+                return 0 /* False */;
+            }
+            if (source.kind === 1 /* Identifier */) {
+                var targetPredicate = target;
+                var sourceIndex = source.parameterIndex - (ts.getThisParameter(sourceDeclaration) ? 1 : 0);
+                var targetIndex = targetPredicate.parameterIndex - (ts.getThisParameter(targetDeclaration) ? 1 : 0);
+                if (sourceIndex !== targetIndex) {
+                    if (reportErrors) {
+                        errorReporter(ts.Diagnostics.Parameter_0_is_not_in_the_same_position_as_parameter_1, source.parameterName, targetPredicate.parameterName);
+                        errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
+                    }
+                    return 0 /* False */;
+                }
+            }
+            var related = compareTypes(source.type, target.type, reportErrors);
+            if (related === 0 /* False */ && reportErrors) {
+                errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
+            }
+            return related;
+        }
+        function isImplementationCompatibleWithOverload(implementation, overload) {
+            var erasedSource = getErasedSignature(implementation);
+            var erasedTarget = getErasedSignature(overload);
+            // First see if the return types are compatible in either direction.
+            var sourceReturnType = getReturnTypeOfSignature(erasedSource);
+            var targetReturnType = getReturnTypeOfSignature(erasedTarget);
+            if (targetReturnType === voidType
+                || isTypeRelatedTo(targetReturnType, sourceReturnType, assignableRelation)
+                || isTypeRelatedTo(sourceReturnType, targetReturnType, assignableRelation)) {
+                return isSignatureAssignableTo(erasedSource, erasedTarget, /*ignoreReturnTypes*/ true);
+            }
+            return false;
+        }
+        function getNumNonRestParameters(signature) {
+            var numParams = signature.parameters.length;
+            return signature.hasRestParameter ?
+                numParams - 1 :
+                numParams;
+        }
+        function getNumParametersToCheckForSignatureRelatability(source, sourceNonRestParamCount, target, targetNonRestParamCount) {
+            if (source.hasRestParameter === target.hasRestParameter) {
+                if (source.hasRestParameter) {
+                    // If both have rest parameters, get the max and add 1 to
+                    // compensate for the rest parameter.
+                    return Math.max(sourceNonRestParamCount, targetNonRestParamCount) + 1;
+                }
+                else {
+                    return Math.min(sourceNonRestParamCount, targetNonRestParamCount);
+                }
+            }
+            else {
+                // Return the count for whichever signature doesn't have rest parameters.
+                return source.hasRestParameter ?
+                    targetNonRestParamCount :
+                    sourceNonRestParamCount;
+            }
+        }
+        function isEmptyResolvedType(t) {
+            return t.properties.length === 0 &&
+                t.callSignatures.length === 0 &&
+                t.constructSignatures.length === 0 &&
+                !t.stringIndexInfo &&
+                !t.numberIndexInfo;
+        }
+        function isEmptyObjectType(type) {
+            return type.flags & 131072 /* Object */ ? isEmptyResolvedType(resolveStructuredTypeMembers(type)) :
+                type.flags & 16777216 /* NonPrimitive */ ? true :
+                    type.flags & 262144 /* Union */ ? ts.some(type.types, isEmptyObjectType) :
+                        type.flags & 524288 /* Intersection */ ? ts.every(type.types, isEmptyObjectType) :
+                            false;
+        }
+        function isEnumTypeRelatedTo(sourceSymbol, targetSymbol, errorReporter) {
+            if (sourceSymbol === targetSymbol) {
+                return true;
+            }
+            var id = getSymbolId(sourceSymbol) + "," + getSymbolId(targetSymbol);
+            var relation = enumRelation.get(id);
+            if (relation !== undefined) {
+                return relation;
+            }
+            if (sourceSymbol.escapedName !== targetSymbol.escapedName || !(sourceSymbol.flags & 256 /* RegularEnum */) || !(targetSymbol.flags & 256 /* RegularEnum */)) {
+                enumRelation.set(id, false);
+                return false;
+            }
+            var targetEnumType = getTypeOfSymbol(targetSymbol);
+            for (var _i = 0, _a = getPropertiesOfType(getTypeOfSymbol(sourceSymbol)); _i < _a.length; _i++) {
+                var property = _a[_i];
+                if (property.flags & 8 /* EnumMember */) {
+                    var targetProperty = getPropertyOfType(targetEnumType, property.escapedName);
+                    if (!targetProperty || !(targetProperty.flags & 8 /* EnumMember */)) {
+                        if (errorReporter) {
+                            errorReporter(ts.Diagnostics.Property_0_is_missing_in_type_1, ts.symbolName(property), typeToString(getDeclaredTypeOfSymbol(targetSymbol), /*enclosingDeclaration*/ undefined, 64 /* UseFullyQualifiedType */));
+                        }
+                        enumRelation.set(id, false);
+                        return false;
+                    }
+                }
+            }
+            enumRelation.set(id, true);
+            return true;
+        }
+        function isSimpleTypeRelatedTo(source, target, relation, errorReporter) {
+            var s = source.flags;
+            var t = target.flags;
+            if (t & 3 /* AnyOrUnknown */ || s & 32768 /* Never */ || source === wildcardType)
+                return true;
+            if (t & 32768 /* Never */)
+                return false;
+            if (s & 68 /* StringLike */ && t & 4 /* String */)
+                return true;
+            if (s & 64 /* StringLiteral */ && s & 512 /* EnumLiteral */ &&
+                t & 64 /* StringLiteral */ && !(t & 512 /* EnumLiteral */) &&
+                source.value === target.value)
+                return true;
+            if (s & 168 /* NumberLike */ && t & 8 /* Number */)
+                return true;
+            if (s & 128 /* NumberLiteral */ && s & 512 /* EnumLiteral */ &&
+                t & 128 /* NumberLiteral */ && !(t & 512 /* EnumLiteral */) &&
+                source.value === target.value)
+                return true;
+            if (s & 272 /* BooleanLike */ && t & 16 /* Boolean */)
+                return true;
+            if (s & 3072 /* ESSymbolLike */ && t & 1024 /* ESSymbol */)
+                return true;
+            if (s & 32 /* Enum */ && t & 32 /* Enum */ && isEnumTypeRelatedTo(source.symbol, target.symbol, errorReporter))
+                return true;
+            if (s & 512 /* EnumLiteral */ && t & 512 /* EnumLiteral */) {
+                if (s & 262144 /* Union */ && t & 262144 /* Union */ && isEnumTypeRelatedTo(source.symbol, target.symbol, errorReporter))
+                    return true;
+                if (s & 448 /* Literal */ && t & 448 /* Literal */ &&
+                    source.value === target.value &&
+                    isEnumTypeRelatedTo(getParentOfSymbol(source.symbol), getParentOfSymbol(target.symbol), errorReporter))
+                    return true;
+            }
+            if (s & 8192 /* Undefined */ && (!strictNullChecks || t & (8192 /* Undefined */ | 4096 /* Void */)))
+                return true;
+            if (s & 16384 /* Null */ && (!strictNullChecks || t & 16384 /* Null */))
+                return true;
+            if (s & 131072 /* Object */ && t & 16777216 /* NonPrimitive */)
+                return true;
+            if (s & 2048 /* UniqueESSymbol */ || t & 2048 /* UniqueESSymbol */)
+                return false;
+            if (relation === assignableRelation || relation === definitelyAssignableRelation || relation === comparableRelation) {
+                if (s & 1 /* Any */)
+                    return true;
+                // Type number or any numeric literal type is assignable to any numeric enum type or any
+                // numeric enum literal type. This rule exists for backwards compatibility reasons because
+                // bit-flag enum types sometimes look like literal enum types with numeric literal values.
+                if (s & (8 /* Number */ | 128 /* NumberLiteral */) && !(s & 512 /* EnumLiteral */) && (t & 32 /* Enum */ || t & 128 /* NumberLiteral */ && t & 512 /* EnumLiteral */))
+                    return true;
+            }
+            return false;
+        }
+        function isTypeRelatedTo(source, target, relation) {
+            if (source.flags & 192 /* StringOrNumberLiteral */ && source.flags & 33554432 /* FreshLiteral */) {
+                source = source.regularType;
+            }
+            if (target.flags & 192 /* StringOrNumberLiteral */ && target.flags & 33554432 /* FreshLiteral */) {
+                target = target.regularType;
+            }
+            if (source === target ||
+                relation === comparableRelation && !(target.flags & 32768 /* Never */) && isSimpleTypeRelatedTo(target, source, relation) ||
+                relation !== identityRelation && isSimpleTypeRelatedTo(source, target, relation)) {
+                return true;
+            }
+            if (source.flags & 131072 /* Object */ && target.flags & 131072 /* Object */) {
+                var related = relation.get(getRelationKey(source, target, relation));
+                if (related !== undefined) {
+                    return related === 1 /* Succeeded */;
+                }
+            }
+            if (source.flags & 16711680 /* StructuredOrInstantiable */ || target.flags & 16711680 /* StructuredOrInstantiable */) {
+                return checkTypeRelatedTo(source, target, relation, /*errorNode*/ undefined);
+            }
+            return false;
+        }
+        function isIgnoredJsxProperty(source, sourceProp, targetMemberType) {
+            return ts.getObjectFlags(source) & 4096 /* JsxAttributes */ && !(isUnhyphenatedJsxName(sourceProp.escapedName) || targetMemberType);
+        }
+        /**
+         * Checks if 'source' is related to 'target' (e.g.: is a assignable to).
+         * @param source The left-hand-side of the relation.
+         * @param target The right-hand-side of the relation.
+         * @param relation The relation considered. One of 'identityRelation', 'subtypeRelation', 'assignableRelation', or 'comparableRelation'.
+         * Used as both to determine which checks are performed and as a cache of previously computed results.
+         * @param errorNode The suggested node upon which all errors will be reported, if defined. This may or may not be the actual node used.
+         * @param headMessage If the error chain should be prepended by a head message, then headMessage will be used.
+         * @param containingMessageChain A chain of errors to prepend any new errors found.
+         */
+        function checkTypeRelatedTo(source, target, relation, errorNode, headMessage, containingMessageChain) {
+            var errorInfo;
+            var maybeKeys;
+            var sourceStack;
+            var targetStack;
+            var maybeCount = 0;
+            var depth = 0;
+            var expandingFlags = 0 /* None */;
+            var overflow = false;
+            var isIntersectionConstituent = false;
+            ts.Debug.assert(relation !== identityRelation || !errorNode, "no error reporting in identity checking");
+            var result = isRelatedTo(source, target, /*reportErrors*/ !!errorNode, headMessage);
+            if (overflow) {
+                error(errorNode, ts.Diagnostics.Excessive_stack_depth_comparing_types_0_and_1, typeToString(source), typeToString(target));
+            }
+            else if (errorInfo) {
+                if (containingMessageChain) {
+                    var chain_1 = containingMessageChain();
+                    if (chain_1) {
+                        errorInfo = ts.concatenateDiagnosticMessageChains(chain_1, errorInfo);
+                    }
+                }
+                diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(errorNode, errorInfo)); // TODO: GH#18217
+            }
+            // Check if we should issue an extra diagnostic to produce a quickfix for a slightly incorrect import statement
+            if (headMessage && errorNode && !result && source.symbol) {
+                var links = getSymbolLinks(source.symbol);
+                if (links.originatingImport && !ts.isImportCall(links.originatingImport)) {
+                    var helpfulRetry = checkTypeRelatedTo(getTypeOfSymbol(links.target), target, relation, /*errorNode*/ undefined);
+                    if (helpfulRetry) {
+                        // Likely an incorrect import. Issue a helpful diagnostic to produce a quickfix to change the import
+                        diagnostics.add(ts.createDiagnosticForNode(links.originatingImport, ts.Diagnostics.A_namespace_style_import_cannot_be_called_or_constructed_and_will_cause_a_failure_at_runtime));
+                    }
+                }
+            }
+            return result !== 0 /* False */;
+            function reportError(message, arg0, arg1, arg2) {
+                ts.Debug.assert(!!errorNode);
+                errorInfo = ts.chainDiagnosticMessages(errorInfo, message, arg0, arg1, arg2);
+            }
+            function reportRelationError(message, source, target) {
+                var sourceType = typeToString(source);
+                var targetType = typeToString(target);
+                if (sourceType === targetType) {
+                    sourceType = typeToString(source, /*enclosingDeclaration*/ undefined, 64 /* UseFullyQualifiedType */);
+                    targetType = typeToString(target, /*enclosingDeclaration*/ undefined, 64 /* UseFullyQualifiedType */);
+                }
+                if (!message) {
+                    if (relation === comparableRelation) {
+                        message = ts.Diagnostics.Type_0_is_not_comparable_to_type_1;
+                    }
+                    else if (sourceType === targetType) {
+                        message = ts.Diagnostics.Type_0_is_not_assignable_to_type_1_Two_different_types_with_this_name_exist_but_they_are_unrelated;
+                    }
+                    else {
+                        message = ts.Diagnostics.Type_0_is_not_assignable_to_type_1;
+                    }
+                }
+                reportError(message, sourceType, targetType);
+            }
+            function tryElaborateErrorsForPrimitivesAndObjects(source, target) {
+                var sourceType = typeToString(source);
+                var targetType = typeToString(target);
+                if ((globalStringType === source && stringType === target) ||
+                    (globalNumberType === source && numberType === target) ||
+                    (globalBooleanType === source && booleanType === target) ||
+                    (getGlobalESSymbolType(/*reportErrors*/ false) === source && esSymbolType === target)) {
+                    reportError(ts.Diagnostics._0_is_a_primitive_but_1_is_a_wrapper_object_Prefer_using_0_when_possible, targetType, sourceType);
+                }
+            }
+            function isUnionOrIntersectionTypeWithoutNullableConstituents(type) {
+                if (!(type.flags & 786432 /* UnionOrIntersection */)) {
+                    return false;
+                }
+                // at this point we know that this is union or intersection type possibly with nullable constituents.
+                // check if we still will have compound type if we ignore nullable components.
+                var seenNonNullable = false;
+                for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                    var t = _a[_i];
+                    if (t.flags & 24576 /* Nullable */) {
+                        continue;
+                    }
+                    if (seenNonNullable) {
+                        return true;
+                    }
+                    seenNonNullable = true;
+                }
+                return false;
+            }
+            /**
+             * Compare two types and return
+             * * Ternary.True if they are related with no assumptions,
+             * * Ternary.Maybe if they are related with assumptions of other relationships, or
+             * * Ternary.False if they are not related.
+             */
+            function isRelatedTo(source, target, reportErrors, headMessage) {
+                if (reportErrors === void 0) { reportErrors = false; }
+                if (source.flags & 192 /* StringOrNumberLiteral */ && source.flags & 33554432 /* FreshLiteral */) {
+                    source = source.regularType;
+                }
+                if (target.flags & 192 /* StringOrNumberLiteral */ && target.flags & 33554432 /* FreshLiteral */) {
+                    target = target.regularType;
+                }
+                if (source.flags & 8388608 /* Substitution */) {
+                    source = relation === definitelyAssignableRelation ? source.typeVariable : source.substitute;
+                }
+                if (target.flags & 8388608 /* Substitution */) {
+                    target = target.typeVariable;
+                }
+                if (source.flags & 2097152 /* IndexedAccess */) {
+                    source = getSimplifiedType(source);
+                }
+                if (target.flags & 2097152 /* IndexedAccess */) {
+                    target = getSimplifiedType(target);
+                }
+                // both types are the same - covers 'they are the same primitive type or both are Any' or the same type parameter cases
+                if (source === target)
+                    return -1 /* True */;
+                if (relation === identityRelation) {
+                    return isIdenticalTo(source, target);
+                }
+                if (relation === comparableRelation && !(target.flags & 32768 /* Never */) && isSimpleTypeRelatedTo(target, source, relation) ||
+                    isSimpleTypeRelatedTo(source, target, relation, reportErrors ? reportError : undefined))
+                    return -1 /* True */;
+                if (isObjectLiteralType(source) && source.flags & 33554432 /* FreshLiteral */) {
+                    var discriminantType = target.flags & 262144 /* Union */ ? findMatchingDiscriminantType(source, target) : undefined;
+                    if (hasExcessProperties(source, target, discriminantType, reportErrors)) {
+                        if (reportErrors) {
+                            reportRelationError(headMessage, source, target);
+                        }
+                        return 0 /* False */;
+                    }
+                    // Above we check for excess properties with respect to the entire target type. When union
+                    // and intersection types are further deconstructed on the target side, we don't want to
+                    // make the check again (as it might fail for a partial target type). Therefore we obtain
+                    // the regular source type and proceed with that.
+                    if (isUnionOrIntersectionTypeWithoutNullableConstituents(target) && !discriminantType) {
+                        source = getRegularTypeOfObjectLiteral(source);
+                    }
+                }
+                if (relation !== comparableRelation &&
+                    !(source.flags & 786432 /* UnionOrIntersection */) &&
+                    !(target.flags & 262144 /* Union */) &&
+                    !isIntersectionConstituent &&
+                    source !== globalObjectType &&
+                    (getPropertiesOfType(source).length > 0 || typeHasCallOrConstructSignatures(source)) &&
+                    isWeakType(target) &&
+                    !hasCommonProperties(source, target)) {
+                    if (reportErrors) {
+                        var calls = getSignaturesOfType(source, 0 /* Call */);
+                        var constructs = getSignaturesOfType(source, 1 /* Construct */);
+                        if (calls.length > 0 && isRelatedTo(getReturnTypeOfSignature(calls[0]), target, /*reportErrors*/ false) ||
+                            constructs.length > 0 && isRelatedTo(getReturnTypeOfSignature(constructs[0]), target, /*reportErrors*/ false)) {
+                            reportError(ts.Diagnostics.Value_of_type_0_has_no_properties_in_common_with_type_1_Did_you_mean_to_call_it, typeToString(source), typeToString(target));
+                        }
+                        else {
+                            reportError(ts.Diagnostics.Type_0_has_no_properties_in_common_with_type_1, typeToString(source), typeToString(target));
+                        }
+                    }
+                    return 0 /* False */;
+                }
+                var result = 0 /* False */;
+                var saveErrorInfo = errorInfo;
+                var saveIsIntersectionConstituent = isIntersectionConstituent;
+                isIntersectionConstituent = false;
+                // Note that these checks are specifically ordered to produce correct results. In particular,
+                // we need to deconstruct unions before intersections (because unions are always at the top),
+                // and we need to handle "each" relations before "some" relations for the same kind of type.
+                if (source.flags & 262144 /* Union */) {
+                    result = relation === comparableRelation ?
+                        someTypeRelatedToType(source, target, reportErrors && !(source.flags & 32764 /* Primitive */)) :
+                        eachTypeRelatedToType(source, target, reportErrors && !(source.flags & 32764 /* Primitive */));
+                }
+                else {
+                    if (target.flags & 262144 /* Union */) {
+                        result = typeRelatedToSomeType(source, target, reportErrors && !(source.flags & 32764 /* Primitive */) && !(target.flags & 32764 /* Primitive */));
+                    }
+                    else if (target.flags & 524288 /* Intersection */) {
+                        isIntersectionConstituent = true;
+                        result = typeRelatedToEachType(source, target, reportErrors);
+                    }
+                    else if (source.flags & 524288 /* Intersection */) {
+                        // Check to see if any constituents of the intersection are immediately related to the target.
+                        //
+                        // Don't report errors though. Checking whether a constituent is related to the source is not actually
+                        // useful and leads to some confusing error messages. Instead it is better to let the below checks
+                        // take care of this, or to not elaborate at all. For instance,
+                        //
+                        //    - For an object type (such as 'C = A & B'), users are usually more interested in structural errors.
+                        //
+                        //    - For a union type (such as '(A | B) = (C & D)'), it's better to hold onto the whole intersection
+                        //          than to report that 'D' is not assignable to 'A' or 'B'.
+                        //
+                        //    - For a primitive type or type parameter (such as 'number = A & B') there is no point in
+                        //          breaking the intersection apart.
+                        result = someTypeRelatedToType(source, target, /*reportErrors*/ false);
+                    }
+                    if (!result && (source.flags & 16711680 /* StructuredOrInstantiable */ || target.flags & 16711680 /* StructuredOrInstantiable */)) {
+                        if (result = recursiveTypeRelatedTo(source, target, reportErrors)) {
+                            errorInfo = saveErrorInfo;
+                        }
+                    }
+                }
+                if (!result && source.flags & 524288 /* Intersection */) {
+                    // The combined constraint of an intersection type is the intersection of the constraints of
+                    // the constituents. When an intersection type contains instantiable types with union type
+                    // constraints, there are situations where we need to examine the combined constraint. One is
+                    // when the target is a union type. Another is when the intersection contains types belonging
+                    // to one of the disjoint domains. For example, given type variables T and U, each with the
+                    // constraint 'string | number', the combined constraint of 'T & U' is 'string | number' and
+                    // we need to check this constraint against a union on the target side. Also, given a type
+                    // variable V constrained to 'string | number', 'V & number' has a combined constraint of
+                    // 'string & number | number & number' which reduces to just 'number'.
+                    var constraint = getUnionConstraintOfIntersection(source, !!(target.flags & 262144 /* Union */));
+                    if (constraint) {
+                        if (result = isRelatedTo(constraint, target, reportErrors)) {
+                            errorInfo = saveErrorInfo;
+                        }
+                    }
+                }
+                isIntersectionConstituent = saveIsIntersectionConstituent;
+                if (!result && reportErrors) {
+                    if (source.flags & 131072 /* Object */ && target.flags & 32764 /* Primitive */) {
+                        tryElaborateErrorsForPrimitivesAndObjects(source, target);
+                    }
+                    else if (source.symbol && source.flags & 131072 /* Object */ && globalObjectType === source) {
+                        reportError(ts.Diagnostics.The_Object_type_is_assignable_to_very_few_other_types_Did_you_mean_to_use_the_any_type_instead);
+                    }
+                    else if (ts.getObjectFlags(source) & 4096 /* JsxAttributes */ && target.flags & 524288 /* Intersection */) {
+                        var targetTypes = target.types;
+                        var intrinsicAttributes = getJsxType(JsxNames.IntrinsicAttributes, errorNode);
+                        var intrinsicClassAttributes = getJsxType(JsxNames.IntrinsicClassAttributes, errorNode);
+                        if (intrinsicAttributes !== errorType && intrinsicClassAttributes !== errorType &&
+                            (ts.contains(targetTypes, intrinsicAttributes) || ts.contains(targetTypes, intrinsicClassAttributes))) {
+                            // do not report top error
+                            return result;
+                        }
+                    }
+                    reportRelationError(headMessage, source, target);
+                }
+                return result;
+            }
+            function isIdenticalTo(source, target) {
+                var result;
+                var flags = source.flags & target.flags;
+                if (flags & 131072 /* Object */) {
+                    return recursiveTypeRelatedTo(source, target, /*reportErrors*/ false);
+                }
+                if (flags & (262144 /* Union */ | 524288 /* Intersection */)) {
+                    if (result = eachTypeRelatedToSomeType(source, target)) {
+                        if (result &= eachTypeRelatedToSomeType(target, source)) {
+                            return result;
+                        }
+                    }
+                }
+                if (flags & 1048576 /* Index */) {
+                    return isRelatedTo(source.type, target.type, /*reportErrors*/ false);
+                }
+                if (flags & 2097152 /* IndexedAccess */) {
+                    if (result = isRelatedTo(source.objectType, target.objectType, /*reportErrors*/ false)) {
+                        if (result &= isRelatedTo(source.indexType, target.indexType, /*reportErrors*/ false)) {
+                            return result;
+                        }
+                    }
+                }
+                if (flags & 4194304 /* Conditional */) {
+                    if (source.root.isDistributive === target.root.isDistributive) {
+                        if (result = isRelatedTo(source.checkType, target.checkType, /*reportErrors*/ false)) {
+                            if (result &= isRelatedTo(source.extendsType, target.extendsType, /*reportErrors*/ false)) {
+                                if (result &= isRelatedTo(getTrueTypeFromConditionalType(source), getTrueTypeFromConditionalType(target), /*reportErrors*/ false)) {
+                                    if (result &= isRelatedTo(getFalseTypeFromConditionalType(source), getFalseTypeFromConditionalType(target), /*reportErrors*/ false)) {
+                                        return result;
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+                if (flags & 8388608 /* Substitution */) {
+                    return isRelatedTo(source.substitute, target.substitute, /*reportErrors*/ false);
+                }
+                return 0 /* False */;
+            }
+            function hasExcessProperties(source, target, discriminant, reportErrors) {
+                if (maybeTypeOfKind(target, 131072 /* Object */) && !(ts.getObjectFlags(target) & 512 /* ObjectLiteralPatternWithComputedProperties */)) {
+                    var isComparingJsxAttributes = !!(ts.getObjectFlags(source) & 4096 /* JsxAttributes */);
+                    if ((relation === assignableRelation || relation === definitelyAssignableRelation || relation === comparableRelation) &&
+                        (isTypeSubsetOf(globalObjectType, target) || (!isComparingJsxAttributes && isEmptyObjectType(target)))) {
+                        return false;
+                    }
+                    if (discriminant) {
+                        // check excess properties against discriminant type only, not the entire union
+                        return hasExcessProperties(source, discriminant, /*discriminant*/ undefined, reportErrors);
+                    }
+                    var _loop_7 = function (prop) {
+                        if (!isKnownProperty(target, prop.escapedName, isComparingJsxAttributes)) {
+                            if (reportErrors) {
+                                // We know *exactly* where things went wrong when comparing the types.
+                                // Use this property as the error node as this will be more helpful in
+                                // reasoning about what went wrong.
+                                if (!errorNode)
+                                    return { value: ts.Debug.fail() };
+                                if (ts.isJsxAttributes(errorNode) || ts.isJsxOpeningLikeElement(errorNode)) {
+                                    // JsxAttributes has an object-literal flag and undergo same type-assignablity check as normal object-literal.
+                                    // However, using an object-literal error message will be very confusing to the users so we give different a message.
+                                    reportError(ts.Diagnostics.Property_0_does_not_exist_on_type_1, symbolToString(prop), typeToString(target));
+                                }
+                                else {
+                                    // use the property's value declaration if the property is assigned inside the literal itself
+                                    var objectLiteralDeclaration_1 = source.symbol && ts.firstOrUndefined(source.symbol.declarations);
+                                    var suggestion = void 0;
+                                    if (prop.valueDeclaration && ts.findAncestor(prop.valueDeclaration, function (d) { return d === objectLiteralDeclaration_1; })) {
+                                        var propDeclaration = prop.valueDeclaration;
+                                        ts.Debug.assertNode(propDeclaration, ts.isObjectLiteralElementLike);
+                                        errorNode = propDeclaration;
+                                        var name = propDeclaration.name;
+                                        if (ts.isIdentifier(name)) {
+                                            suggestion = getSuggestionForNonexistentProperty(name, target);
+                                        }
+                                    }
+                                    if (suggestion !== undefined) {
+                                        reportError(ts.Diagnostics.Object_literal_may_only_specify_known_properties_but_0_does_not_exist_in_type_1_Did_you_mean_to_write_2, symbolToString(prop), typeToString(target), suggestion);
+                                    }
+                                    else {
+                                        reportError(ts.Diagnostics.Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1, symbolToString(prop), typeToString(target));
+                                    }
+                                }
+                            }
+                            return { value: true };
+                        }
+                    };
+                    for (var _i = 0, _a = getPropertiesOfObjectType(source); _i < _a.length; _i++) {
+                        var prop = _a[_i];
+                        var state_3 = _loop_7(prop);
+                        if (typeof state_3 === "object")
+                            return state_3.value;
+                    }
+                }
+                return false;
+            }
+            function eachTypeRelatedToSomeType(source, target) {
+                var result = -1 /* True */;
+                var sourceTypes = source.types;
+                for (var _i = 0, sourceTypes_1 = sourceTypes; _i < sourceTypes_1.length; _i++) {
+                    var sourceType = sourceTypes_1[_i];
+                    var related = typeRelatedToSomeType(sourceType, target, /*reportErrors*/ false);
+                    if (!related) {
+                        return 0 /* False */;
+                    }
+                    result &= related;
+                }
+                return result;
+            }
+            function typeRelatedToSomeType(source, target, reportErrors) {
+                var targetTypes = target.types;
+                if (target.flags & 262144 /* Union */ && containsType(targetTypes, source)) {
+                    return -1 /* True */;
+                }
+                for (var _i = 0, targetTypes_1 = targetTypes; _i < targetTypes_1.length; _i++) {
+                    var type = targetTypes_1[_i];
+                    var related = isRelatedTo(source, type, /*reportErrors*/ false);
+                    if (related) {
+                        return related;
+                    }
+                }
+                if (reportErrors) {
+                    var discriminantType = findMatchingDiscriminantType(source, target);
+                    isRelatedTo(source, discriminantType || targetTypes[targetTypes.length - 1], /*reportErrors*/ true);
+                }
+                return 0 /* False */;
+            }
+            // Keep this up-to-date with the same logic within `getApparentTypeOfContextualType`, since they should behave similarly
+            function findMatchingDiscriminantType(source, target) {
+                var match;
+                var sourceProperties = getPropertiesOfObjectType(source);
+                if (sourceProperties) {
+                    var sourcePropertiesFiltered = findDiscriminantProperties(sourceProperties, target);
+                    if (sourcePropertiesFiltered) {
+                        for (var _i = 0, sourcePropertiesFiltered_1 = sourcePropertiesFiltered; _i < sourcePropertiesFiltered_1.length; _i++) {
+                            var sourceProperty = sourcePropertiesFiltered_1[_i];
+                            var sourceType = getTypeOfSymbol(sourceProperty);
+                            for (var _a = 0, _b = target.types; _a < _b.length; _a++) {
+                                var type = _b[_a];
+                                var targetType = getTypeOfPropertyOfType(type, sourceProperty.escapedName);
+                                if (targetType && isRelatedTo(sourceType, targetType)) {
+                                    if (type === match)
+                                        continue; // Finding multiple fields which discriminate to the same type is fine
+                                    if (match) {
+                                        return undefined;
+                                    }
+                                    match = type;
+                                }
+                            }
+                        }
+                    }
+                }
+                return match;
+            }
+            function typeRelatedToEachType(source, target, reportErrors) {
+                var result = -1 /* True */;
+                var targetTypes = target.types;
+                for (var _i = 0, targetTypes_2 = targetTypes; _i < targetTypes_2.length; _i++) {
+                    var targetType = targetTypes_2[_i];
+                    var related = isRelatedTo(source, targetType, reportErrors);
+                    if (!related) {
+                        return 0 /* False */;
+                    }
+                    result &= related;
+                }
+                return result;
+            }
+            function someTypeRelatedToType(source, target, reportErrors) {
+                var sourceTypes = source.types;
+                if (source.flags & 262144 /* Union */ && containsType(sourceTypes, target)) {
+                    return -1 /* True */;
+                }
+                var len = sourceTypes.length;
+                for (var i = 0; i < len; i++) {
+                    var related = isRelatedTo(sourceTypes[i], target, reportErrors && i === len - 1);
+                    if (related) {
+                        return related;
+                    }
+                }
+                return 0 /* False */;
+            }
+            function eachTypeRelatedToType(source, target, reportErrors) {
+                var result = -1 /* True */;
+                var sourceTypes = source.types;
+                for (var _i = 0, sourceTypes_2 = sourceTypes; _i < sourceTypes_2.length; _i++) {
+                    var sourceType = sourceTypes_2[_i];
+                    var related = isRelatedTo(sourceType, target, reportErrors);
+                    if (!related) {
+                        return 0 /* False */;
+                    }
+                    result &= related;
+                }
+                return result;
+            }
+            function typeArgumentsRelatedTo(source, target, variances, reportErrors) {
+                var sources = source.typeArguments || ts.emptyArray;
+                var targets = target.typeArguments || ts.emptyArray;
+                if (sources.length !== targets.length && relation === identityRelation) {
+                    return 0 /* False */;
+                }
+                var length = sources.length <= targets.length ? sources.length : targets.length;
+                var result = -1 /* True */;
+                for (var i = 0; i < length; i++) {
+                    // When variance information isn't available we default to covariance. This happens
+                    // in the process of computing variance information for recursive types and when
+                    // comparing 'this' type arguments.
+                    var variance = i < variances.length ? variances[i] : 1 /* Covariant */;
+                    // We ignore arguments for independent type parameters (because they're never witnessed).
+                    if (variance !== 4 /* Independent */) {
+                        var s = sources[i];
+                        var t = targets[i];
+                        var related = -1 /* True */;
+                        if (variance === 1 /* Covariant */) {
+                            related = isRelatedTo(s, t, reportErrors);
+                        }
+                        else if (variance === 2 /* Contravariant */) {
+                            related = isRelatedTo(t, s, reportErrors);
+                        }
+                        else if (variance === 3 /* Bivariant */) {
+                            // In the bivariant case we first compare contravariantly without reporting
+                            // errors. Then, if that doesn't succeed, we compare covariantly with error
+                            // reporting. Thus, error elaboration will be based on the the covariant check,
+                            // which is generally easier to reason about.
+                            related = isRelatedTo(t, s, /*reportErrors*/ false);
+                            if (!related) {
+                                related = isRelatedTo(s, t, reportErrors);
+                            }
+                        }
+                        else {
+                            // In the invariant case we first compare covariantly, and only when that
+                            // succeeds do we proceed to compare contravariantly. Thus, error elaboration
+                            // will typically be based on the covariant check.
+                            related = isRelatedTo(s, t, reportErrors);
+                            if (related) {
+                                related &= isRelatedTo(t, s, reportErrors);
+                            }
+                        }
+                        if (!related) {
+                            return 0 /* False */;
+                        }
+                        result &= related;
+                    }
+                }
+                return result;
+            }
+            // Determine if possibly recursive types are related. First, check if the result is already available in the global cache.
+            // Second, check if we have already started a comparison of the given two types in which case we assume the result to be true.
+            // Third, check if both types are part of deeply nested chains of generic type instantiations and if so assume the types are
+            // equal and infinitely expanding. Fourth, if we have reached a depth of 100 nested comparisons, assume we have runaway recursion
+            // and issue an error. Otherwise, actually compare the structure of the two types.
+            function recursiveTypeRelatedTo(source, target, reportErrors) {
+                if (overflow) {
+                    return 0 /* False */;
+                }
+                var id = getRelationKey(source, target, relation);
+                var related = relation.get(id);
+                if (related !== undefined) {
+                    if (reportErrors && related === 2 /* Failed */) {
+                        // We are elaborating errors and the cached result is an unreported failure. Record the result as a reported
+                        // failure and continue computing the relation such that errors get reported.
+                        relation.set(id, 3 /* FailedAndReported */);
+                    }
+                    else {
+                        return related === 1 /* Succeeded */ ? -1 /* True */ : 0 /* False */;
+                    }
+                }
+                if (!maybeKeys) {
+                    maybeKeys = [];
+                    sourceStack = [];
+                    targetStack = [];
+                }
+                else {
+                    for (var i = 0; i < maybeCount; i++) {
+                        // If source and target are already being compared, consider them related with assumptions
+                        if (id === maybeKeys[i]) {
+                            return 1 /* Maybe */;
+                        }
+                    }
+                    if (depth === 100) {
+                        overflow = true;
+                        return 0 /* False */;
+                    }
+                }
+                var maybeStart = maybeCount;
+                maybeKeys[maybeCount] = id;
+                maybeCount++;
+                sourceStack[depth] = source;
+                targetStack[depth] = target;
+                depth++;
+                var saveExpandingFlags = expandingFlags;
+                if (!(expandingFlags & 1 /* Source */) && isDeeplyNestedType(source, sourceStack, depth))
+                    expandingFlags |= 1 /* Source */;
+                if (!(expandingFlags & 2 /* Target */) && isDeeplyNestedType(target, targetStack, depth))
+                    expandingFlags |= 2 /* Target */;
+                var result = expandingFlags !== 3 /* Both */ ? structuredTypeRelatedTo(source, target, reportErrors) : 1 /* Maybe */;
+                expandingFlags = saveExpandingFlags;
+                depth--;
+                if (result) {
+                    if (result === -1 /* True */ || depth === 0) {
+                        // If result is definitely true, record all maybe keys as having succeeded
+                        for (var i = maybeStart; i < maybeCount; i++) {
+                            relation.set(maybeKeys[i], 1 /* Succeeded */);
+                        }
+                        maybeCount = maybeStart;
+                    }
+                }
+                else {
+                    // A false result goes straight into global cache (when something is false under
+                    // assumptions it will also be false without assumptions)
+                    relation.set(id, reportErrors ? 3 /* FailedAndReported */ : 2 /* Failed */);
+                    maybeCount = maybeStart;
+                }
+                return result;
+            }
+            function getConstraintForRelation(type) {
+                return relation === definitelyAssignableRelation ? undefined : getConstraintOfType(type);
+            }
+            function structuredTypeRelatedTo(source, target, reportErrors) {
+                var result;
+                var originalErrorInfo;
+                var saveErrorInfo = errorInfo;
+                if (target.flags & 65536 /* TypeParameter */) {
+                    // A source type { [P in keyof T]: X } is related to a target type T if X is related to T[P].
+                    if (ts.getObjectFlags(source) & 32 /* Mapped */ && getConstraintTypeFromMappedType(source) === getIndexType(target)) {
+                        if (!(getMappedTypeModifiers(source) & 4 /* IncludeOptional */)) {
+                            var templateType = getTemplateTypeFromMappedType(source);
+                            var indexedAccessType = getIndexedAccessType(target, getTypeParameterFromMappedType(source));
+                            if (result = isRelatedTo(templateType, indexedAccessType, reportErrors)) {
+                                return result;
+                            }
+                        }
+                    }
+                }
+                else if (target.flags & 1048576 /* Index */) {
+                    // A keyof S is related to a keyof T if T is related to S.
+                    if (source.flags & 1048576 /* Index */) {
+                        if (result = isRelatedTo(target.type, source.type, /*reportErrors*/ false)) {
+                            return result;
+                        }
+                    }
+                    // A type S is assignable to keyof T if S is assignable to keyof C, where C is the
+                    // simplified form of T or, if T doesn't simplify, the constraint of T.
+                    if (relation !== definitelyAssignableRelation) {
+                        var simplified = getSimplifiedType(target.type);
+                        var constraint = simplified !== target.type ? simplified : getConstraintOfType(target.type);
+                        if (constraint) {
+                            if (result = isRelatedTo(source, getIndexType(constraint, target.stringsOnly), reportErrors)) {
+                                return result;
+                            }
+                        }
+                    }
+                }
+                else if (target.flags & 2097152 /* IndexedAccess */) {
+                    // A type S is related to a type T[K] if S is related to C, where C is the
+                    // constraint of T[K]
+                    var constraint = getConstraintForRelation(target);
+                    if (constraint) {
+                        if (result = isRelatedTo(source, constraint, reportErrors)) {
+                            errorInfo = saveErrorInfo;
+                            return result;
+                        }
+                    }
+                }
+                else if (isGenericMappedType(target)) {
+                    // A source type T is related to a target type { [P in X]: T[P] }
+                    var template = getTemplateTypeFromMappedType(target);
+                    var modifiers = getMappedTypeModifiers(target);
+                    if (!(modifiers & 8 /* ExcludeOptional */)) {
+                        if (template.flags & 2097152 /* IndexedAccess */ && template.objectType === source &&
+                            template.indexType === getTypeParameterFromMappedType(target)) {
+                            return -1 /* True */;
+                        }
+                        // A source type T is related to a target type { [P in keyof T]: X } if T[P] is related to X.
+                        if (!isGenericMappedType(source) && getConstraintTypeFromMappedType(target) === getIndexType(source)) {
+                            var indexedAccessType = getIndexedAccessType(source, getTypeParameterFromMappedType(target));
+                            var templateType = getTemplateTypeFromMappedType(target);
+                            if (result = isRelatedTo(indexedAccessType, templateType, reportErrors)) {
+                                errorInfo = saveErrorInfo;
+                                return result;
+                            }
+                        }
+                    }
+                }
+                if (source.flags & 2162688 /* TypeVariable */) {
+                    if (source.flags & 2097152 /* IndexedAccess */ && target.flags & 2097152 /* IndexedAccess */) {
+                        // A type S[K] is related to a type T[J] if S is related to T and K is related to J.
+                        if (result = isRelatedTo(source.objectType, target.objectType, reportErrors)) {
+                            result &= isRelatedTo(source.indexType, target.indexType, reportErrors);
+                        }
+                        if (result) {
+                            errorInfo = saveErrorInfo;
+                            return result;
+                        }
+                    }
+                    var constraint = getConstraintForRelation(source);
+                    if (!constraint || (source.flags & 65536 /* TypeParameter */ && constraint.flags & 3 /* AnyOrUnknown */)) {
+                        // A type variable with no constraint is not related to the non-primitive object type.
+                        if (result = isRelatedTo(emptyObjectType, extractTypesOfKind(target, ~16777216 /* NonPrimitive */))) {
+                            errorInfo = saveErrorInfo;
+                            return result;
+                        }
+                    }
+                    else {
+                        var instantiated = getTypeWithThisArgument(constraint, source);
+                        if (result = isRelatedTo(instantiated, target, reportErrors)) {
+                            errorInfo = saveErrorInfo;
+                            return result;
+                        }
+                    }
+                }
+                else if (source.flags & 1048576 /* Index */) {
+                    if (result = isRelatedTo(keyofConstraintType, target, reportErrors)) {
+                        errorInfo = saveErrorInfo;
+                        return result;
+                    }
+                }
+                else if (source.flags & 4194304 /* Conditional */) {
+                    if (target.flags & 4194304 /* Conditional */) {
+                        // Two conditional types 'T1 extends U1 ? X1 : Y1' and 'T2 extends U2 ? X2 : Y2' are related if
+                        // one of T1 and T2 is related to the other, U1 and U2 are identical types, X1 is related to X2,
+                        // and Y1 is related to Y2.
+                        if (isTypeIdenticalTo(source.extendsType, target.extendsType) &&
+                            (isRelatedTo(source.checkType, target.checkType) || isRelatedTo(target.checkType, source.checkType))) {
+                            if (result = isRelatedTo(getTrueTypeFromConditionalType(source), getTrueTypeFromConditionalType(target), reportErrors)) {
+                                result &= isRelatedTo(getFalseTypeFromConditionalType(source), getFalseTypeFromConditionalType(target), reportErrors);
+                            }
+                            if (result) {
+                                errorInfo = saveErrorInfo;
+                                return result;
+                            }
+                        }
+                    }
+                    else if (relation !== definitelyAssignableRelation) {
+                        var distributiveConstraint = getConstraintOfDistributiveConditionalType(source);
+                        if (distributiveConstraint) {
+                            if (result = isRelatedTo(distributiveConstraint, target, reportErrors)) {
+                                errorInfo = saveErrorInfo;
+                                return result;
+                            }
+                        }
+                        var defaultConstraint = getDefaultConstraintOfConditionalType(source);
+                        if (defaultConstraint) {
+                            if (result = isRelatedTo(defaultConstraint, target, reportErrors)) {
+                                errorInfo = saveErrorInfo;
+                                return result;
+                            }
+                        }
+                    }
+                }
+                else {
+                    if (ts.getObjectFlags(source) & 4 /* Reference */ && ts.getObjectFlags(target) & 4 /* Reference */ && source.target === target.target &&
+                        !(ts.getObjectFlags(source) & 8192 /* MarkerType */ || ts.getObjectFlags(target) & 8192 /* MarkerType */)) {
+                        // We have type references to the same generic type, and the type references are not marker
+                        // type references (which are intended by be compared structurally). Obtain the variance
+                        // information for the type parameters and relate the type arguments accordingly.
+                        var variances = getVariances(source.target);
+                        if (result = typeArgumentsRelatedTo(source, target, variances, reportErrors)) {
+                            return result;
+                        }
+                        // The type arguments did not relate appropriately, but it may be because we have no variance
+                        // information (in which case typeArgumentsRelatedTo defaulted to covariance for all type
+                        // arguments). It might also be the case that the target type has a 'void' type argument for
+                        // a covariant type parameter that is only used in return positions within the generic type
+                        // (in which case any type argument is permitted on the source side). In those cases we proceed
+                        // with a structural comparison. Otherwise, we know for certain the instantiations aren't
+                        // related and we can return here.
+                        if (variances !== ts.emptyArray && !hasCovariantVoidArgument(target, variances)) {
+                            // In some cases generic types that are covariant in regular type checking mode become
+                            // invariant in --strictFunctionTypes mode because one or more type parameters are used in
+                            // both co- and contravariant positions. In order to make it easier to diagnose *why* such
+                            // types are invariant, if any of the type parameters are invariant we reset the reported
+                            // errors and instead force a structural comparison (which will include elaborations that
+                            // reveal the reason).
+                            if (!(reportErrors && ts.some(variances, function (v) { return v === 0 /* Invariant */; }))) {
+                                return 0 /* False */;
+                            }
+                            // We remember the original error information so we can restore it in case the structural
+                            // comparison unexpectedly succeeds. This can happen when the structural comparison result
+                            // is a Ternary.Maybe for example caused by the recursion depth limiter.
+                            originalErrorInfo = errorInfo;
+                            errorInfo = saveErrorInfo;
+                        }
+                    }
+                    // Even if relationship doesn't hold for unions, intersections, or generic type references,
+                    // it may hold in a structural comparison.
+                    var sourceIsPrimitive = !!(source.flags & 32764 /* Primitive */);
+                    if (relation !== identityRelation) {
+                        source = getApparentType(source);
+                    }
+                    // In a check of the form X = A & B, we will have previously checked if A relates to X or B relates
+                    // to X. Failing both of those we want to check if the aggregation of A and B's members structurally
+                    // relates to X. Thus, we include intersection types on the source side here.
+                    if (source.flags & (131072 /* Object */ | 524288 /* Intersection */) && target.flags & 131072 /* Object */) {
+                        // Report structural errors only if we haven't reported any errors yet
+                        var reportStructuralErrors = reportErrors && errorInfo === saveErrorInfo && !sourceIsPrimitive;
+                        // An empty object type is related to any mapped type that includes a '?' modifier.
+                        if (isPartialMappedType(target) && !isGenericMappedType(source) && isEmptyObjectType(source)) {
+                            result = -1 /* True */;
+                        }
+                        else if (isGenericMappedType(target)) {
+                            result = isGenericMappedType(source) ? mappedTypeRelatedTo(source, target, reportStructuralErrors) : 0 /* False */;
+                        }
+                        else {
+                            result = propertiesRelatedTo(source, target, reportStructuralErrors);
+                            if (result) {
+                                result &= signaturesRelatedTo(source, target, 0 /* Call */, reportStructuralErrors);
+                                if (result) {
+                                    result &= signaturesRelatedTo(source, target, 1 /* Construct */, reportStructuralErrors);
+                                    if (result) {
+                                        result &= indexTypesRelatedTo(source, target, 0 /* String */, sourceIsPrimitive, reportStructuralErrors);
+                                        if (result) {
+                                            result &= indexTypesRelatedTo(source, target, 1 /* Number */, sourceIsPrimitive, reportStructuralErrors);
+                                        }
+                                    }
+                                }
+                            }
+                        }
+                        if (result) {
+                            if (!originalErrorInfo) {
+                                errorInfo = saveErrorInfo;
+                                return result;
+                            }
+                            errorInfo = originalErrorInfo;
+                        }
+                    }
+                }
+                return 0 /* False */;
+            }
+            // A type [P in S]: X is related to a type [Q in T]: Y if T is related to S and X' is
+            // related to Y, where X' is an instantiation of X in which P is replaced with Q. Notice
+            // that S and T are contra-variant whereas X and Y are co-variant.
+            function mappedTypeRelatedTo(source, target, reportErrors) {
+                var modifiersRelated = relation === comparableRelation || (relation === identityRelation ? getMappedTypeModifiers(source) === getMappedTypeModifiers(target) :
+                    getCombinedMappedTypeOptionality(source) <= getCombinedMappedTypeOptionality(target));
+                if (modifiersRelated) {
+                    var result_2;
+                    if (result_2 = isRelatedTo(getConstraintTypeFromMappedType(target), getConstraintTypeFromMappedType(source), reportErrors)) {
+                        var mapper = createTypeMapper([getTypeParameterFromMappedType(source)], [getTypeParameterFromMappedType(target)]);
+                        return result_2 & isRelatedTo(instantiateType(getTemplateTypeFromMappedType(source), mapper), getTemplateTypeFromMappedType(target), reportErrors);
+                    }
+                }
+                return 0 /* False */;
+            }
+            function propertiesRelatedTo(source, target, reportErrors) {
+                if (relation === identityRelation) {
+                    return propertiesIdenticalTo(source, target);
+                }
+                var requireOptionalProperties = relation === subtypeRelation && !isObjectLiteralType(source) && !isEmptyArrayLiteralType(source);
+                var unmatchedProperty = getUnmatchedProperty(source, target, requireOptionalProperties);
+                if (unmatchedProperty) {
+                    if (reportErrors) {
+                        reportError(ts.Diagnostics.Property_0_is_missing_in_type_1, symbolToString(unmatchedProperty), typeToString(source));
+                    }
+                    return 0 /* False */;
+                }
+                if (isObjectLiteralType(target)) {
+                    for (var _i = 0, _a = getPropertiesOfType(source); _i < _a.length; _i++) {
+                        var sourceProp = _a[_i];
+                        if (!getPropertyOfObjectType(target, sourceProp.escapedName)) {
+                            var sourceType = getTypeOfSymbol(sourceProp);
+                            if (!(sourceType === undefinedType || sourceType === undefinedWideningType)) {
+                                if (reportErrors) {
+                                    reportError(ts.Diagnostics.Property_0_does_not_exist_on_type_1, symbolToString(sourceProp), typeToString(target));
+                                }
+                                return 0 /* False */;
+                            }
+                        }
+                    }
+                }
+                var result = -1 /* True */;
+                var properties = getPropertiesOfObjectType(target);
+                for (var _b = 0, properties_3 = properties; _b < properties_3.length; _b++) {
+                    var targetProp = properties_3[_b];
+                    if (!(targetProp.flags & 4194304 /* Prototype */)) {
+                        var sourceProp = getPropertyOfType(source, targetProp.escapedName);
+                        if (sourceProp && sourceProp !== targetProp) {
+                            if (isIgnoredJsxProperty(source, sourceProp, getTypeOfSymbol(targetProp))) {
+                                continue;
+                            }
+                            var sourcePropFlags = ts.getDeclarationModifierFlagsFromSymbol(sourceProp);
+                            var targetPropFlags = ts.getDeclarationModifierFlagsFromSymbol(targetProp);
+                            if (sourcePropFlags & 8 /* Private */ || targetPropFlags & 8 /* Private */) {
+                                var hasDifferingDeclarations = sourceProp.valueDeclaration !== targetProp.valueDeclaration;
+                                if (ts.getCheckFlags(sourceProp) & 256 /* ContainsPrivate */ && hasDifferingDeclarations) {
+                                    if (reportErrors) {
+                                        reportError(ts.Diagnostics.Property_0_has_conflicting_declarations_and_is_inaccessible_in_type_1, symbolToString(sourceProp), typeToString(source));
+                                    }
+                                    return 0 /* False */;
+                                }
+                                if (hasDifferingDeclarations) {
+                                    if (reportErrors) {
+                                        if (sourcePropFlags & 8 /* Private */ && targetPropFlags & 8 /* Private */) {
+                                            reportError(ts.Diagnostics.Types_have_separate_declarations_of_a_private_property_0, symbolToString(targetProp));
+                                        }
+                                        else {
+                                            reportError(ts.Diagnostics.Property_0_is_private_in_type_1_but_not_in_type_2, symbolToString(targetProp), typeToString(sourcePropFlags & 8 /* Private */ ? source : target), typeToString(sourcePropFlags & 8 /* Private */ ? target : source));
+                                        }
+                                    }
+                                    return 0 /* False */;
+                                }
+                            }
+                            else if (targetPropFlags & 16 /* Protected */) {
+                                if (!isValidOverrideOf(sourceProp, targetProp)) {
+                                    if (reportErrors) {
+                                        reportError(ts.Diagnostics.Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2, symbolToString(targetProp), typeToString(getDeclaringClass(sourceProp) || source), typeToString(getDeclaringClass(targetProp) || target));
+                                    }
+                                    return 0 /* False */;
+                                }
+                            }
+                            else if (sourcePropFlags & 16 /* Protected */) {
+                                if (reportErrors) {
+                                    reportError(ts.Diagnostics.Property_0_is_protected_in_type_1_but_public_in_type_2, symbolToString(targetProp), typeToString(source), typeToString(target));
+                                }
+                                return 0 /* False */;
+                            }
+                            var related = isRelatedTo(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp), reportErrors);
+                            if (!related) {
+                                if (reportErrors) {
+                                    reportError(ts.Diagnostics.Types_of_property_0_are_incompatible, symbolToString(targetProp));
+                                }
+                                return 0 /* False */;
+                            }
+                            result &= related;
+                            // When checking for comparability, be more lenient with optional properties.
+                            if (relation !== comparableRelation && sourceProp.flags & 16777216 /* Optional */ && !(targetProp.flags & 16777216 /* Optional */)) {
+                                // TypeScript 1.0 spec (April 2014): 3.8.3
+                                // S is a subtype of a type T, and T is a supertype of S if ...
+                                // S' and T are object types and, for each member M in T..
+                                // M is a property and S' contains a property N where
+                                // if M is a required property, N is also a required property
+                                // (M - property in T)
+                                // (N - property in S)
+                                if (reportErrors) {
+                                    reportError(ts.Diagnostics.Property_0_is_optional_in_type_1_but_required_in_type_2, symbolToString(targetProp), typeToString(source), typeToString(target));
+                                }
+                                return 0 /* False */;
+                            }
+                        }
+                    }
+                }
+                return result;
+            }
+            /**
+             * A type is 'weak' if it is an object type with at least one optional property
+             * and no required properties, call/construct signatures or index signatures
+             */
+            function isWeakType(type) {
+                if (type.flags & 131072 /* Object */) {
+                    var resolved = resolveStructuredTypeMembers(type);
+                    return resolved.callSignatures.length === 0 && resolved.constructSignatures.length === 0 &&
+                        !resolved.stringIndexInfo && !resolved.numberIndexInfo &&
+                        resolved.properties.length > 0 &&
+                        ts.every(resolved.properties, function (p) { return !!(p.flags & 16777216 /* Optional */); });
+                }
+                if (type.flags & 524288 /* Intersection */) {
+                    return ts.every(type.types, isWeakType);
+                }
+                return false;
+            }
+            function hasCommonProperties(source, target) {
+                var isComparingJsxAttributes = !!(ts.getObjectFlags(source) & 4096 /* JsxAttributes */);
+                for (var _i = 0, _a = getPropertiesOfType(source); _i < _a.length; _i++) {
+                    var prop = _a[_i];
+                    if (isKnownProperty(target, prop.escapedName, isComparingJsxAttributes)) {
+                        return true;
+                    }
+                }
+                return false;
+            }
+            function propertiesIdenticalTo(source, target) {
+                if (!(source.flags & 131072 /* Object */ && target.flags & 131072 /* Object */)) {
+                    return 0 /* False */;
+                }
+                var sourceProperties = getPropertiesOfObjectType(source);
+                var targetProperties = getPropertiesOfObjectType(target);
+                if (sourceProperties.length !== targetProperties.length) {
+                    return 0 /* False */;
+                }
+                var result = -1 /* True */;
+                for (var _i = 0, sourceProperties_1 = sourceProperties; _i < sourceProperties_1.length; _i++) {
+                    var sourceProp = sourceProperties_1[_i];
+                    var targetProp = getPropertyOfObjectType(target, sourceProp.escapedName);
+                    if (!targetProp) {
+                        return 0 /* False */;
+                    }
+                    var related = compareProperties(sourceProp, targetProp, isRelatedTo);
+                    if (!related) {
+                        return 0 /* False */;
+                    }
+                    result &= related;
+                }
+                return result;
+            }
+            function signaturesRelatedTo(source, target, kind, reportErrors) {
+                if (relation === identityRelation) {
+                    return signaturesIdenticalTo(source, target, kind);
+                }
+                if (target === anyFunctionType || source === anyFunctionType) {
+                    return -1 /* True */;
+                }
+                var sourceSignatures = getSignaturesOfType(source, kind);
+                var targetSignatures = getSignaturesOfType(target, kind);
+                if (kind === 1 /* Construct */ && sourceSignatures.length && targetSignatures.length) {
+                    if (ts.isAbstractConstructorType(source) && !ts.isAbstractConstructorType(target)) {
+                        // An abstract constructor type is not assignable to a non-abstract constructor type
+                        // as it would otherwise be possible to new an abstract class. Note that the assignability
+                        // check we perform for an extends clause excludes construct signatures from the target,
+                        // so this check never proceeds.
+                        if (reportErrors) {
+                            reportError(ts.Diagnostics.Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type);
+                        }
+                        return 0 /* False */;
+                    }
+                    if (!constructorVisibilitiesAreCompatible(sourceSignatures[0], targetSignatures[0], reportErrors)) {
+                        return 0 /* False */;
+                    }
+                }
+                var result = -1 /* True */;
+                var saveErrorInfo = errorInfo;
+                if (ts.getObjectFlags(source) & 64 /* Instantiated */ && ts.getObjectFlags(target) & 64 /* Instantiated */ && source.symbol === target.symbol) {
+                    // We have instantiations of the same anonymous type (which typically will be the type of a
+                    // method). Simply do a pairwise comparison of the signatures in the two signature lists instead
+                    // of the much more expensive N * M comparison matrix we explore below. We erase type parameters
+                    // as they are known to always be the same.
+                    for (var i = 0; i < targetSignatures.length; i++) {
+                        var related = signatureRelatedTo(sourceSignatures[i], targetSignatures[i], /*erase*/ true, reportErrors);
+                        if (!related) {
+                            return 0 /* False */;
+                        }
+                        result &= related;
+                    }
+                }
+                else if (sourceSignatures.length === 1 && targetSignatures.length === 1) {
+                    // For simple functions (functions with a single signature) we only erase type parameters for
+                    // the comparable relation. Otherwise, if the source signature is generic, we instantiate it
+                    // in the context of the target signature before checking the relationship. Ideally we'd do
+                    // this regardless of the number of signatures, but the potential costs are prohibitive due
+                    // to the quadratic nature of the logic below.
+                    var eraseGenerics = relation === comparableRelation || !!compilerOptions.noStrictGenericChecks;
+                    result = signatureRelatedTo(sourceSignatures[0], targetSignatures[0], eraseGenerics, reportErrors);
+                }
+                else {
+                    outer: for (var _i = 0, targetSignatures_1 = targetSignatures; _i < targetSignatures_1.length; _i++) {
+                        var t = targetSignatures_1[_i];
+                        // Only elaborate errors from the first failure
+                        var shouldElaborateErrors = reportErrors;
+                        for (var _a = 0, sourceSignatures_1 = sourceSignatures; _a < sourceSignatures_1.length; _a++) {
+                            var s = sourceSignatures_1[_a];
+                            var related = signatureRelatedTo(s, t, /*erase*/ true, shouldElaborateErrors);
+                            if (related) {
+                                result &= related;
+                                errorInfo = saveErrorInfo;
+                                continue outer;
+                            }
+                            shouldElaborateErrors = false;
+                        }
+                        if (shouldElaborateErrors) {
+                            reportError(ts.Diagnostics.Type_0_provides_no_match_for_the_signature_1, typeToString(source), signatureToString(t, /*enclosingDeclaration*/ undefined, /*flags*/ undefined, kind));
+                        }
+                        return 0 /* False */;
+                    }
+                }
+                return result;
+            }
+            /**
+             * See signatureAssignableTo, compareSignaturesIdentical
+             */
+            function signatureRelatedTo(source, target, erase, reportErrors) {
+                return compareSignaturesRelated(erase ? getErasedSignature(source) : source, erase ? getErasedSignature(target) : target, 0 /* None */, /*ignoreReturnTypes*/ false, reportErrors, reportError, isRelatedTo);
+            }
+            function signaturesIdenticalTo(source, target, kind) {
+                var sourceSignatures = getSignaturesOfType(source, kind);
+                var targetSignatures = getSignaturesOfType(target, kind);
+                if (sourceSignatures.length !== targetSignatures.length) {
+                    return 0 /* False */;
+                }
+                var result = -1 /* True */;
+                for (var i = 0; i < sourceSignatures.length; i++) {
+                    var related = compareSignaturesIdentical(sourceSignatures[i], targetSignatures[i], /*partialMatch*/ false, /*ignoreThisTypes*/ false, /*ignoreReturnTypes*/ false, isRelatedTo);
+                    if (!related) {
+                        return 0 /* False */;
+                    }
+                    result &= related;
+                }
+                return result;
+            }
+            function eachPropertyRelatedTo(source, target, kind, reportErrors) {
+                var result = -1 /* True */;
+                for (var _i = 0, _a = getPropertiesOfObjectType(source); _i < _a.length; _i++) {
+                    var prop = _a[_i];
+                    if (isIgnoredJsxProperty(source, prop, /*targetMemberType*/ undefined)) {
+                        continue;
+                    }
+                    // Skip over symbol-named members
+                    if (prop.nameType && prop.nameType.flags & 2048 /* UniqueESSymbol */) {
+                        continue;
+                    }
+                    if (kind === 0 /* String */ || isNumericLiteralName(prop.escapedName)) {
+                        var related = isRelatedTo(getTypeOfSymbol(prop), target, reportErrors);
+                        if (!related) {
+                            if (reportErrors) {
+                                reportError(ts.Diagnostics.Property_0_is_incompatible_with_index_signature, symbolToString(prop));
+                            }
+                            return 0 /* False */;
+                        }
+                        result &= related;
+                    }
+                }
+                return result;
+            }
+            function indexInfoRelatedTo(sourceInfo, targetInfo, reportErrors) {
+                var related = isRelatedTo(sourceInfo.type, targetInfo.type, reportErrors);
+                if (!related && reportErrors) {
+                    reportError(ts.Diagnostics.Index_signatures_are_incompatible);
+                }
+                return related;
+            }
+            function indexTypesRelatedTo(source, target, kind, sourceIsPrimitive, reportErrors) {
+                if (relation === identityRelation) {
+                    return indexTypesIdenticalTo(source, target, kind);
+                }
+                var targetInfo = getIndexInfoOfType(target, kind);
+                if (!targetInfo || targetInfo.type.flags & 3 /* AnyOrUnknown */ && !sourceIsPrimitive) {
+                    // Index signature of type any permits assignment from everything but primitives
+                    return -1 /* True */;
+                }
+                var sourceInfo = getIndexInfoOfType(source, kind) ||
+                    kind === 1 /* Number */ && getIndexInfoOfType(source, 0 /* String */);
+                if (sourceInfo) {
+                    return indexInfoRelatedTo(sourceInfo, targetInfo, reportErrors);
+                }
+                if (isGenericMappedType(source)) {
+                    // A generic mapped type { [P in K]: T } is related to an index signature { [x: string]: U }
+                    // if T is related to U.
+                    return (kind === 0 /* String */ && isRelatedTo(getTemplateTypeFromMappedType(source), targetInfo.type, reportErrors)); // TODO: GH#18217
+                }
+                if (isObjectTypeWithInferableIndex(source)) {
+                    var related = -1 /* True */;
+                    if (kind === 0 /* String */) {
+                        var sourceNumberInfo = getIndexInfoOfType(source, 1 /* Number */);
+                        if (sourceNumberInfo) {
+                            related = indexInfoRelatedTo(sourceNumberInfo, targetInfo, reportErrors);
+                        }
+                    }
+                    if (related) {
+                        related &= eachPropertyRelatedTo(source, targetInfo.type, kind, reportErrors);
+                    }
+                    return related;
+                }
+                if (reportErrors) {
+                    reportError(ts.Diagnostics.Index_signature_is_missing_in_type_0, typeToString(source));
+                }
+                return 0 /* False */;
+            }
+            function indexTypesIdenticalTo(source, target, indexKind) {
+                var targetInfo = getIndexInfoOfType(target, indexKind);
+                var sourceInfo = getIndexInfoOfType(source, indexKind);
+                if (!sourceInfo && !targetInfo) {
+                    return -1 /* True */;
+                }
+                if (sourceInfo && targetInfo && sourceInfo.isReadonly === targetInfo.isReadonly) {
+                    return isRelatedTo(sourceInfo.type, targetInfo.type);
+                }
+                return 0 /* False */;
+            }
+            function constructorVisibilitiesAreCompatible(sourceSignature, targetSignature, reportErrors) {
+                if (!sourceSignature.declaration || !targetSignature.declaration) {
+                    return true;
+                }
+                var sourceAccessibility = ts.getSelectedModifierFlags(sourceSignature.declaration, 24 /* NonPublicAccessibilityModifier */);
+                var targetAccessibility = ts.getSelectedModifierFlags(targetSignature.declaration, 24 /* NonPublicAccessibilityModifier */);
+                // A public, protected and private signature is assignable to a private signature.
+                if (targetAccessibility === 8 /* Private */) {
+                    return true;
+                }
+                // A public and protected signature is assignable to a protected signature.
+                if (targetAccessibility === 16 /* Protected */ && sourceAccessibility !== 8 /* Private */) {
+                    return true;
+                }
+                // Only a public signature is assignable to public signature.
+                if (targetAccessibility !== 16 /* Protected */ && !sourceAccessibility) {
+                    return true;
+                }
+                if (reportErrors) {
+                    reportError(ts.Diagnostics.Cannot_assign_a_0_constructor_type_to_a_1_constructor_type, visibilityToString(sourceAccessibility), visibilityToString(targetAccessibility));
+                }
+                return false;
+            }
+        }
+        // Return a type reference where the source type parameter is replaced with the target marker
+        // type, and flag the result as a marker type reference.
+        function getMarkerTypeReference(type, source, target) {
+            var result = createTypeReference(type, ts.map(type.typeParameters, function (t) { return t === source ? target : t; }));
+            result.objectFlags |= 8192 /* MarkerType */;
+            return result;
+        }
+        // Return an array containing the variance of each type parameter. The variance is effectively
+        // a digest of the type comparisons that occur for each type argument when instantiations of the
+        // generic type are structurally compared. We infer the variance information by comparing
+        // instantiations of the generic type for type arguments with known relations. The function
+        // returns the emptyArray singleton if we're not in strictFunctionTypes mode or if the function
+        // has been invoked recursively for the given generic type.
+        function getVariances(type) {
+            if (!strictFunctionTypes) {
+                return ts.emptyArray;
+            }
+            var typeParameters = type.typeParameters || ts.emptyArray;
+            var variances = type.variances;
+            if (!variances) {
+                if (type === globalArrayType || type === globalReadonlyArrayType) {
+                    // Arrays are known to be covariant, no need to spend time computing this
+                    variances = [1 /* Covariant */];
+                }
+                else {
+                    // The emptyArray singleton is used to signal a recursive invocation.
+                    type.variances = ts.emptyArray;
+                    variances = [];
+                    for (var _i = 0, typeParameters_1 = typeParameters; _i < typeParameters_1.length; _i++) {
+                        var tp = typeParameters_1[_i];
+                        // We first compare instantiations where the type parameter is replaced with
+                        // marker types that have a known subtype relationship. From this we can infer
+                        // invariance, covariance, contravariance or bivariance.
+                        var typeWithSuper = getMarkerTypeReference(type, tp, markerSuperType);
+                        var typeWithSub = getMarkerTypeReference(type, tp, markerSubType);
+                        var variance = (isTypeAssignableTo(typeWithSub, typeWithSuper) ? 1 /* Covariant */ : 0) |
+                            (isTypeAssignableTo(typeWithSuper, typeWithSub) ? 2 /* Contravariant */ : 0);
+                        // If the instantiations appear to be related bivariantly it may be because the
+                        // type parameter is independent (i.e. it isn't witnessed anywhere in the generic
+                        // type). To determine this we compare instantiations where the type parameter is
+                        // replaced with marker types that are known to be unrelated.
+                        if (variance === 3 /* Bivariant */ && isTypeAssignableTo(getMarkerTypeReference(type, tp, markerOtherType), typeWithSuper)) {
+                            variance = 4 /* Independent */;
+                        }
+                        variances.push(variance);
+                    }
+                }
+                type.variances = variances;
+            }
+            return variances;
+        }
+        // Return true if the given type reference has a 'void' type argument for a covariant type parameter.
+        // See comment at call in recursiveTypeRelatedTo for when this case matters.
+        function hasCovariantVoidArgument(type, variances) {
+            for (var i = 0; i < variances.length; i++) {
+                if (variances[i] === 1 /* Covariant */ && type.typeArguments[i].flags & 4096 /* Void */) {
+                    return true;
+                }
+            }
+            return false;
+        }
+        function isUnconstrainedTypeParameter(type) {
+            return type.flags & 65536 /* TypeParameter */ && !getConstraintFromTypeParameter(type);
+        }
+        function isTypeReferenceWithGenericArguments(type) {
+            return !!(ts.getObjectFlags(type) & 4 /* Reference */) && ts.some(type.typeArguments, function (t) { return isUnconstrainedTypeParameter(t) || isTypeReferenceWithGenericArguments(t); });
+        }
+        /**
+         * getTypeReferenceId(A<T, number, U>) returns "111=0-12=1"
+         *   where A.id=111 and number.id=12
+         */
+        function getTypeReferenceId(type, typeParameters, depth) {
+            if (depth === void 0) { depth = 0; }
+            var result = "" + type.target.id;
+            for (var _i = 0, _a = type.typeArguments; _i < _a.length; _i++) {
+                var t = _a[_i];
+                if (isUnconstrainedTypeParameter(t)) {
+                    var index = typeParameters.indexOf(t);
+                    if (index < 0) {
+                        index = typeParameters.length;
+                        typeParameters.push(t);
+                    }
+                    result += "=" + index;
+                }
+                else if (depth < 4 && isTypeReferenceWithGenericArguments(t)) {
+                    result += "<" + getTypeReferenceId(t, typeParameters, depth + 1) + ">";
+                }
+                else {
+                    result += "-" + t.id;
+                }
+            }
+            return result;
+        }
+        /**
+         * To improve caching, the relation key for two generic types uses the target's id plus ids of the type parameters.
+         * For other cases, the types ids are used.
+         */
+        function getRelationKey(source, target, relation) {
+            if (relation === identityRelation && source.id > target.id) {
+                var temp = source;
+                source = target;
+                target = temp;
+            }
+            if (isTypeReferenceWithGenericArguments(source) && isTypeReferenceWithGenericArguments(target)) {
+                var typeParameters = [];
+                return getTypeReferenceId(source, typeParameters) + "," + getTypeReferenceId(target, typeParameters);
+            }
+            return source.id + "," + target.id;
+        }
+        // Invoke the callback for each underlying property symbol of the given symbol and return the first
+        // value that isn't undefined.
+        function forEachProperty(prop, callback) {
+            if (ts.getCheckFlags(prop) & 6 /* Synthetic */) {
+                for (var _i = 0, _a = prop.containingType.types; _i < _a.length; _i++) {
+                    var t = _a[_i];
+                    var p = getPropertyOfType(t, prop.escapedName);
+                    var result = p && forEachProperty(p, callback);
+                    if (result) {
+                        return result;
+                    }
+                }
+                return undefined;
+            }
+            return callback(prop);
+        }
+        // Return the declaring class type of a property or undefined if property not declared in class
+        function getDeclaringClass(prop) {
+            return prop.parent && prop.parent.flags & 32 /* Class */ ? getDeclaredTypeOfSymbol(getParentOfSymbol(prop)) : undefined;
+        }
+        // Return true if some underlying source property is declared in a class that derives
+        // from the given base class.
+        function isPropertyInClassDerivedFrom(prop, baseClass) {
+            return forEachProperty(prop, function (sp) {
+                var sourceClass = getDeclaringClass(sp);
+                return sourceClass ? hasBaseType(sourceClass, baseClass) : false;
+            });
+        }
+        // Return true if source property is a valid override of protected parts of target property.
+        function isValidOverrideOf(sourceProp, targetProp) {
+            return !forEachProperty(targetProp, function (tp) { return ts.getDeclarationModifierFlagsFromSymbol(tp) & 16 /* Protected */ ?
+                !isPropertyInClassDerivedFrom(sourceProp, getDeclaringClass(tp)) : false; });
+        }
+        // Return true if the given class derives from each of the declaring classes of the protected
+        // constituents of the given property.
+        function isClassDerivedFromDeclaringClasses(checkClass, prop) {
+            return forEachProperty(prop, function (p) { return ts.getDeclarationModifierFlagsFromSymbol(p) & 16 /* Protected */ ?
+                !hasBaseType(checkClass, getDeclaringClass(p)) : false; }) ? undefined : checkClass;
+        }
+        // Return true if the given type is deeply nested. We consider this to be the case when structural type comparisons
+        // for 5 or more occurrences or instantiations of the type have been recorded on the given stack. It is possible,
+        // though highly unlikely, for this test to be true in a situation where a chain of instantiations is not infinitely
+        // expanding. Effectively, we will generate a false positive when two types are structurally equal to at least 5
+        // levels, but unequal at some level beyond that.
+        function isDeeplyNestedType(type, stack, depth) {
+            // We track all object types that have an associated symbol (representing the origin of the type)
+            if (depth >= 5 && type.flags & 131072 /* Object */) {
+                var symbol = type.symbol;
+                if (symbol) {
+                    var count = 0;
+                    for (var i = 0; i < depth; i++) {
+                        var t = stack[i];
+                        if (t.flags & 131072 /* Object */ && t.symbol === symbol) {
+                            count++;
+                            if (count >= 5)
+                                return true;
+                        }
+                    }
+                }
+            }
+            return false;
+        }
+        function isPropertyIdenticalTo(sourceProp, targetProp) {
+            return compareProperties(sourceProp, targetProp, compareTypesIdentical) !== 0 /* False */;
+        }
+        function compareProperties(sourceProp, targetProp, compareTypes) {
+            // Two members are considered identical when
+            // - they are public properties with identical names, optionality, and types,
+            // - they are private or protected properties originating in the same declaration and having identical types
+            if (sourceProp === targetProp) {
+                return -1 /* True */;
+            }
+            var sourcePropAccessibility = ts.getDeclarationModifierFlagsFromSymbol(sourceProp) & 24 /* NonPublicAccessibilityModifier */;
+            var targetPropAccessibility = ts.getDeclarationModifierFlagsFromSymbol(targetProp) & 24 /* NonPublicAccessibilityModifier */;
+            if (sourcePropAccessibility !== targetPropAccessibility) {
+                return 0 /* False */;
+            }
+            if (sourcePropAccessibility) {
+                if (getTargetSymbol(sourceProp) !== getTargetSymbol(targetProp)) {
+                    return 0 /* False */;
+                }
+            }
+            else {
+                if ((sourceProp.flags & 16777216 /* Optional */) !== (targetProp.flags & 16777216 /* Optional */)) {
+                    return 0 /* False */;
+                }
+            }
+            if (isReadonlySymbol(sourceProp) !== isReadonlySymbol(targetProp)) {
+                return 0 /* False */;
+            }
+            return compareTypes(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp));
+        }
+        function isMatchingSignature(source, target, partialMatch) {
+            // A source signature matches a target signature if the two signatures have the same number of required,
+            // optional, and rest parameters.
+            if (source.parameters.length === target.parameters.length &&
+                source.minArgumentCount === target.minArgumentCount &&
+                source.hasRestParameter === target.hasRestParameter) {
+                return true;
+            }
+            // A source signature partially matches a target signature if the target signature has no fewer required
+            // parameters and no more overall parameters than the source signature (where a signature with a rest
+            // parameter is always considered to have more overall parameters than one without).
+            var sourceRestCount = source.hasRestParameter ? 1 : 0;
+            var targetRestCount = target.hasRestParameter ? 1 : 0;
+            if (partialMatch && source.minArgumentCount <= target.minArgumentCount && (sourceRestCount > targetRestCount ||
+                sourceRestCount === targetRestCount && source.parameters.length >= target.parameters.length)) {
+                return true;
+            }
+            return false;
+        }
+        /**
+         * See signatureRelatedTo, compareSignaturesIdentical
+         */
+        function compareSignaturesIdentical(source, target, partialMatch, ignoreThisTypes, ignoreReturnTypes, compareTypes) {
+            // TODO (drosen): De-duplicate code between related functions.
+            if (source === target) {
+                return -1 /* True */;
+            }
+            if (!(isMatchingSignature(source, target, partialMatch))) {
+                return 0 /* False */;
+            }
+            // Check that the two signatures have the same number of type parameters. We might consider
+            // also checking that any type parameter constraints match, but that would require instantiating
+            // the constraints with a common set of type arguments to get relatable entities in places where
+            // type parameters occur in the constraints. The complexity of doing that doesn't seem worthwhile,
+            // particularly as we're comparing erased versions of the signatures below.
+            if (ts.length(source.typeParameters) !== ts.length(target.typeParameters)) {
+                return 0 /* False */;
+            }
+            // Spec 1.0 Section 3.8.3 & 3.8.4:
+            // M and N (the signatures) are instantiated using type Any as the type argument for all type parameters declared by M and N
+            source = getErasedSignature(source);
+            target = getErasedSignature(target);
+            var result = -1 /* True */;
+            if (!ignoreThisTypes) {
+                var sourceThisType = getThisTypeOfSignature(source);
+                if (sourceThisType) {
+                    var targetThisType = getThisTypeOfSignature(target);
+                    if (targetThisType) {
+                        var related = compareTypes(sourceThisType, targetThisType);
+                        if (!related) {
+                            return 0 /* False */;
+                        }
+                        result &= related;
+                    }
+                }
+            }
+            var targetLen = target.parameters.length;
+            for (var i = 0; i < targetLen; i++) {
+                var s = isRestParameterIndex(source, i) ? getRestTypeOfSignature(source) : getTypeOfParameter(source.parameters[i]);
+                var t = isRestParameterIndex(target, i) ? getRestTypeOfSignature(target) : getTypeOfParameter(target.parameters[i]);
+                var related = compareTypes(s, t);
+                if (!related) {
+                    return 0 /* False */;
+                }
+                result &= related;
+            }
+            if (!ignoreReturnTypes) {
+                var sourceTypePredicate = getTypePredicateOfSignature(source);
+                var targetTypePredicate = getTypePredicateOfSignature(target);
+                result &= sourceTypePredicate !== undefined || targetTypePredicate !== undefined
+                    ? compareTypePredicatesIdentical(sourceTypePredicate, targetTypePredicate, compareTypes)
+                    // If they're both type predicates their return types will both be `boolean`, so no need to compare those.
+                    : compareTypes(getReturnTypeOfSignature(source), getReturnTypeOfSignature(target));
+            }
+            return result;
+        }
+        function compareTypePredicatesIdentical(source, target, compareTypes) {
+            return source === undefined || target === undefined || !typePredicateKindsMatch(source, target) ? 0 /* False */ : compareTypes(source.type, target.type);
+        }
+        function isRestParameterIndex(signature, parameterIndex) {
+            return signature.hasRestParameter && parameterIndex >= signature.parameters.length - 1;
+        }
+        function literalTypesWithSameBaseType(types) {
+            var commonBaseType;
+            for (var _i = 0, types_9 = types; _i < types_9.length; _i++) {
+                var t = types_9[_i];
+                var baseType = getBaseTypeOfLiteralType(t);
+                if (!commonBaseType) {
+                    commonBaseType = baseType;
+                }
+                if (baseType === t || baseType !== commonBaseType) {
+                    return false;
+                }
+            }
+            return true;
+        }
+        // When the candidate types are all literal types with the same base type, return a union
+        // of those literal types. Otherwise, return the leftmost type for which no type to the
+        // right is a supertype.
+        function getSupertypeOrUnion(types) {
+            return literalTypesWithSameBaseType(types) ?
+                getUnionType(types) :
+                ts.reduceLeft(types, function (s, t) { return isTypeSubtypeOf(s, t) ? t : s; });
+        }
+        function getCommonSupertype(types) {
+            if (!strictNullChecks) {
+                return getSupertypeOrUnion(types);
+            }
+            var primaryTypes = ts.filter(types, function (t) { return !(t.flags & 24576 /* Nullable */); });
+            return primaryTypes.length ?
+                getNullableType(getSupertypeOrUnion(primaryTypes), getFalsyFlagsOfTypes(types) & 24576 /* Nullable */) :
+                getUnionType(types, 2 /* Subtype */);
+        }
+        // Return the leftmost type for which no type to the right is a subtype.
+        function getCommonSubtype(types) {
+            return ts.reduceLeft(types, function (s, t) { return isTypeSubtypeOf(t, s) ? t : s; });
+        }
+        function isArrayType(type) {
+            return !!(ts.getObjectFlags(type) & 4 /* Reference */) && type.target === globalArrayType;
+        }
+        function isArrayLikeType(type) {
+            // A type is array-like if it is a reference to the global Array or global ReadonlyArray type,
+            // or if it is not the undefined or null type and if it is assignable to ReadonlyArray<any>
+            return ts.getObjectFlags(type) & 4 /* Reference */ && (type.target === globalArrayType || type.target === globalReadonlyArrayType) ||
+                !(type.flags & 24576 /* Nullable */) && isTypeAssignableTo(type, anyReadonlyArrayType);
+        }
+        function isEmptyArrayLiteralType(type) {
+            var elementType = isArrayType(type) ? type.typeArguments[0] : undefined;
+            return elementType === undefinedWideningType || elementType === implicitNeverType;
+        }
+        function isTupleLikeType(type) {
+            return !!getPropertyOfType(type, "0");
+        }
+        function isNeitherUnitTypeNorNever(type) {
+            return !(type.flags & (27072 /* Unit */ | 32768 /* Never */));
+        }
+        function isUnitType(type) {
+            return !!(type.flags & 27072 /* Unit */);
+        }
+        function isLiteralType(type) {
+            return type.flags & 16 /* Boolean */ ? true :
+                type.flags & 262144 /* Union */ ? type.flags & 512 /* EnumLiteral */ ? true : ts.every(type.types, isUnitType) :
+                    isUnitType(type);
+        }
+        function getBaseTypeOfLiteralType(type) {
+            return type.flags & 512 /* EnumLiteral */ ? getBaseTypeOfEnumLiteralType(type) :
+                type.flags & 64 /* StringLiteral */ ? stringType :
+                    type.flags & 128 /* NumberLiteral */ ? numberType :
+                        type.flags & 256 /* BooleanLiteral */ ? booleanType :
+                            type.flags & 262144 /* Union */ ? getUnionType(ts.sameMap(type.types, getBaseTypeOfLiteralType)) :
+                                type;
+        }
+        function getWidenedLiteralType(type) {
+            return type.flags & 512 /* EnumLiteral */ ? getBaseTypeOfEnumLiteralType(type) :
+                type.flags & 64 /* StringLiteral */ && type.flags & 33554432 /* FreshLiteral */ ? stringType :
+                    type.flags & 128 /* NumberLiteral */ && type.flags & 33554432 /* FreshLiteral */ ? numberType :
+                        type.flags & 256 /* BooleanLiteral */ ? booleanType :
+                            type.flags & 262144 /* Union */ ? getUnionType(ts.sameMap(type.types, getWidenedLiteralType)) :
+                                type;
+        }
+        function getWidenedUniqueESSymbolType(type) {
+            return type.flags & 2048 /* UniqueESSymbol */ ? esSymbolType :
+                type.flags & 262144 /* Union */ ? getUnionType(ts.sameMap(type.types, getWidenedUniqueESSymbolType)) :
+                    type;
+        }
+        function getWidenedLiteralLikeTypeForContextualType(type, contextualType) {
+            if (!isLiteralOfContextualType(type, contextualType)) {
+                type = getWidenedUniqueESSymbolType(getWidenedLiteralType(type));
+            }
+            return type;
+        }
+        /**
+         * Check if a Type was written as a tuple type literal.
+         * Prefer using isTupleLikeType() unless the use of `elementTypes` is required.
+         */
+        function isTupleType(type) {
+            return !!(ts.getObjectFlags(type) & 4 /* Reference */ && type.target.objectFlags & 8 /* Tuple */);
+        }
+        function getFalsyFlagsOfTypes(types) {
+            var result = 0;
+            for (var _i = 0, types_10 = types; _i < types_10.length; _i++) {
+                var t = types_10[_i];
+                result |= getFalsyFlags(t);
+            }
+            return result;
+        }
+        // Returns the String, Number, Boolean, StringLiteral, NumberLiteral, BooleanLiteral, Void, Undefined, or Null
+        // flags for the string, number, boolean, "", 0, false, void, undefined, or null types respectively. Returns
+        // no flags for all other types (including non-falsy literal types).
+        function getFalsyFlags(type) {
+            return type.flags & 262144 /* Union */ ? getFalsyFlagsOfTypes(type.types) :
+                type.flags & 64 /* StringLiteral */ ? type.value === "" ? 64 /* StringLiteral */ : 0 :
+                    type.flags & 128 /* NumberLiteral */ ? type.value === 0 ? 128 /* NumberLiteral */ : 0 :
+                        type.flags & 256 /* BooleanLiteral */ ? type === falseType ? 256 /* BooleanLiteral */ : 0 :
+                            type.flags & 29148 /* PossiblyFalsy */;
+        }
+        function removeDefinitelyFalsyTypes(type) {
+            return getFalsyFlags(type) & 29120 /* DefinitelyFalsy */ ?
+                filterType(type, function (t) { return !(getFalsyFlags(t) & 29120 /* DefinitelyFalsy */); }) :
+                type;
+        }
+        function extractDefinitelyFalsyTypes(type) {
+            return mapType(type, getDefinitelyFalsyPartOfType);
+        }
+        function getDefinitelyFalsyPartOfType(type) {
+            return type.flags & 4 /* String */ ? emptyStringType :
+                type.flags & 8 /* Number */ ? zeroType :
+                    type.flags & 16 /* Boolean */ || type === falseType ? falseType :
+                        type.flags & (4096 /* Void */ | 8192 /* Undefined */ | 16384 /* Null */) ||
+                            type.flags & 64 /* StringLiteral */ && type.value === "" ||
+                            type.flags & 128 /* NumberLiteral */ && type.value === 0 ? type :
+                            neverType;
+        }
+        /**
+         * Add undefined or null or both to a type if they are missing.
+         * @param type - type to add undefined and/or null to if not present
+         * @param flags - Either TypeFlags.Undefined or TypeFlags.Null, or both
+         */
+        function getNullableType(type, flags) {
+            var missing = (flags & ~type.flags) & (8192 /* Undefined */ | 16384 /* Null */);
+            return missing === 0 ? type :
+                missing === 8192 /* Undefined */ ? getUnionType([type, undefinedType]) :
+                    missing === 16384 /* Null */ ? getUnionType([type, nullType]) :
+                        getUnionType([type, undefinedType, nullType]);
+        }
+        function getOptionalType(type) {
+            ts.Debug.assert(strictNullChecks);
+            return type.flags & 8192 /* Undefined */ ? type : getUnionType([type, undefinedType]);
+        }
+        function getGlobalNonNullableTypeInstantiation(type) {
+            if (!deferredGlobalNonNullableTypeAlias) {
+                deferredGlobalNonNullableTypeAlias = getGlobalSymbol("NonNullable", 524288 /* TypeAlias */, /*diagnostic*/ undefined) || unknownSymbol;
+            }
+            // Use NonNullable global type alias if available to improve quick info/declaration emit
+            if (deferredGlobalNonNullableTypeAlias !== unknownSymbol) {
+                return getTypeAliasInstantiation(deferredGlobalNonNullableTypeAlias, [type]);
+            }
+            return getTypeWithFacts(type, 524288 /* NEUndefinedOrNull */); // Type alias unavailable, fall back to non-higherorder behavior
+        }
+        function getNonNullableType(type) {
+            return strictNullChecks ? getGlobalNonNullableTypeInstantiation(type) : type;
+        }
+        /**
+         * Return true if type was inferred from an object literal, written as an object type literal, or is the shape of a module
+         * with no call or construct signatures.
+         */
+        function isObjectTypeWithInferableIndex(type) {
+            return type.symbol && (type.symbol.flags & (4096 /* ObjectLiteral */ | 2048 /* TypeLiteral */ | 512 /* ValueModule */)) !== 0 &&
+                !typeHasCallOrConstructSignatures(type);
+        }
+        function createSymbolWithType(source, type) {
+            var symbol = createSymbol(source.flags, source.escapedName);
+            symbol.declarations = source.declarations;
+            symbol.parent = source.parent;
+            symbol.type = type;
+            symbol.target = source;
+            if (source.valueDeclaration) {
+                symbol.valueDeclaration = source.valueDeclaration;
+            }
+            if (source.nameType) {
+                symbol.nameType = source.nameType;
+            }
+            return symbol;
+        }
+        function transformTypeOfMembers(type, f) {
+            var members = ts.createSymbolTable();
+            for (var _i = 0, _a = getPropertiesOfObjectType(type); _i < _a.length; _i++) {
+                var property = _a[_i];
+                var original = getTypeOfSymbol(property);
+                var updated = f(original);
+                members.set(property.escapedName, updated === original ? property : createSymbolWithType(property, updated));
+            }
+            return members;
+        }
+        /**
+         * If the the provided object literal is subject to the excess properties check,
+         * create a new that is exempt. Recursively mark object literal members as exempt.
+         * Leave signatures alone since they are not subject to the check.
+         */
+        function getRegularTypeOfObjectLiteral(type) {
+            if (!(isObjectLiteralType(type) && type.flags & 33554432 /* FreshLiteral */)) {
+                return type;
+            }
+            var regularType = type.regularType;
+            if (regularType) {
+                return regularType;
+            }
+            var resolved = type;
+            var members = transformTypeOfMembers(type, getRegularTypeOfObjectLiteral);
+            var regularNew = createAnonymousType(resolved.symbol, members, resolved.callSignatures, resolved.constructSignatures, resolved.stringIndexInfo, resolved.numberIndexInfo);
+            regularNew.flags = resolved.flags & ~33554432 /* FreshLiteral */;
+            regularNew.objectFlags |= 128 /* ObjectLiteral */;
+            type.regularType = regularNew;
+            return regularNew;
+        }
+        function createWideningContext(parent, propertyName, siblings) {
+            return { parent: parent, propertyName: propertyName, siblings: siblings, resolvedProperties: undefined };
+        }
+        function getSiblingsOfContext(context) {
+            if (!context.siblings) {
+                var siblings_1 = [];
+                for (var _i = 0, _a = getSiblingsOfContext(context.parent); _i < _a.length; _i++) {
+                    var type = _a[_i];
+                    if (isObjectLiteralType(type)) {
+                        var prop = getPropertyOfObjectType(type, context.propertyName);
+                        if (prop) {
+                            forEachType(getTypeOfSymbol(prop), function (t) {
+                                siblings_1.push(t);
+                            });
+                        }
+                    }
+                }
+                context.siblings = siblings_1;
+            }
+            return context.siblings;
+        }
+        function getPropertiesOfContext(context) {
+            if (!context.resolvedProperties) {
+                var names = ts.createMap();
+                for (var _i = 0, _a = getSiblingsOfContext(context); _i < _a.length; _i++) {
+                    var t = _a[_i];
+                    if (isObjectLiteralType(t) && !(ts.getObjectFlags(t) & 1024 /* ContainsSpread */)) {
+                        for (var _b = 0, _c = getPropertiesOfType(t); _b < _c.length; _b++) {
+                            var prop = _c[_b];
+                            names.set(prop.escapedName, prop);
+                        }
+                    }
+                }
+                context.resolvedProperties = ts.arrayFrom(names.values());
+            }
+            return context.resolvedProperties;
+        }
+        function getWidenedProperty(prop, context) {
+            if (!(prop.flags & 4 /* Property */)) {
+                // Since get accessors already widen their return value there is no need to
+                // widen accessor based properties here.
+                return prop;
+            }
+            if (prop.flags & 67108864 /* JSContainer */) {
+                var node = prop.declarations && ts.first(prop.declarations);
+                var init = ts.getAssignedJavascriptInitializer(node);
+                if (init && init.kind !== 184 /* ObjectLiteralExpression */) {
+                    // for JS special declarations, the only kind of initializer that will widen is object literals
+                    return prop;
+                }
+            }
+            var original = getTypeOfSymbol(prop);
+            var propContext = context && createWideningContext(context, prop.escapedName, /*siblings*/ undefined);
+            var widened = getWidenedTypeWithContext(original, propContext);
+            return widened === original ? prop : createSymbolWithType(prop, widened);
+        }
+        function getUndefinedProperty(prop) {
+            var cached = undefinedProperties.get(prop.escapedName);
+            if (cached) {
+                return cached;
+            }
+            var result = createSymbolWithType(prop, undefinedType);
+            result.flags |= 16777216 /* Optional */;
+            undefinedProperties.set(prop.escapedName, result);
+            return result;
+        }
+        function getWidenedTypeOfObjectLiteral(type, context) {
+            var members = ts.createSymbolTable();
+            for (var _i = 0, _a = getPropertiesOfObjectType(type); _i < _a.length; _i++) {
+                var prop = _a[_i];
+                members.set(prop.escapedName, getWidenedProperty(prop, context));
+            }
+            if (context) {
+                for (var _b = 0, _c = getPropertiesOfContext(context); _b < _c.length; _b++) {
+                    var prop = _c[_b];
+                    if (!members.has(prop.escapedName)) {
+                        members.set(prop.escapedName, getUndefinedProperty(prop));
+                    }
+                }
+            }
+            var stringIndexInfo = getIndexInfoOfType(type, 0 /* String */);
+            var numberIndexInfo = getIndexInfoOfType(type, 1 /* Number */);
+            return createAnonymousType(type.symbol, members, ts.emptyArray, ts.emptyArray, stringIndexInfo && createIndexInfo(getWidenedType(stringIndexInfo.type), stringIndexInfo.isReadonly), numberIndexInfo && createIndexInfo(getWidenedType(numberIndexInfo.type), numberIndexInfo.isReadonly));
+        }
+        function getWidenedType(type) {
+            return getWidenedTypeWithContext(type, /*context*/ undefined);
+        }
+        function getWidenedTypeWithContext(type, context) {
+            if (type.flags & 402653184 /* RequiresWidening */) {
+                if (type.flags & 24576 /* Nullable */) {
+                    return anyType;
+                }
+                if (isObjectLiteralType(type)) {
+                    return getWidenedTypeOfObjectLiteral(type, context);
+                }
+                if (type.flags & 262144 /* Union */) {
+                    var unionContext_1 = context || createWideningContext(/*parent*/ undefined, /*propertyName*/ undefined, type.types);
+                    var widenedTypes = ts.sameMap(type.types, function (t) { return t.flags & 24576 /* Nullable */ ? t : getWidenedTypeWithContext(t, unionContext_1); });
+                    // Widening an empty object literal transitions from a highly restrictive type to
+                    // a highly inclusive one. For that reason we perform subtype reduction here if the
+                    // union includes empty object types (e.g. reducing {} | string to just {}).
+                    return getUnionType(widenedTypes, ts.some(widenedTypes, isEmptyObjectType) ? 2 /* Subtype */ : 1 /* Literal */);
+                }
+                if (isArrayType(type) || isTupleType(type)) {
+                    return createTypeReference(type.target, ts.sameMap(type.typeArguments, getWidenedType));
+                }
+            }
+            return type;
+        }
+        /**
+         * Reports implicit any errors that occur as a result of widening 'null' and 'undefined'
+         * to 'any'. A call to reportWideningErrorsInType is normally accompanied by a call to
+         * getWidenedType. But in some cases getWidenedType is called without reporting errors
+         * (type argument inference is an example).
+         *
+         * The return value indicates whether an error was in fact reported. The particular circumstances
+         * are on a best effort basis. Currently, if the null or undefined that causes widening is inside
+         * an object literal property (arbitrarily deeply), this function reports an error. If no error is
+         * reported, reportImplicitAnyError is a suitable fallback to report a general error.
+         */
+        function reportWideningErrorsInType(type) {
+            var errorReported = false;
+            if (type.flags & 134217728 /* ContainsWideningType */) {
+                if (type.flags & 262144 /* Union */) {
+                    if (ts.some(type.types, isEmptyObjectType)) {
+                        errorReported = true;
+                    }
+                    else {
+                        for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                            var t = _a[_i];
+                            if (reportWideningErrorsInType(t)) {
+                                errorReported = true;
+                            }
+                        }
+                    }
+                }
+                if (isArrayType(type) || isTupleType(type)) {
+                    for (var _b = 0, _c = type.typeArguments; _b < _c.length; _b++) {
+                        var t = _c[_b];
+                        if (reportWideningErrorsInType(t)) {
+                            errorReported = true;
+                        }
+                    }
+                }
+                if (isObjectLiteralType(type)) {
+                    for (var _d = 0, _e = getPropertiesOfObjectType(type); _d < _e.length; _d++) {
+                        var p = _e[_d];
+                        var t = getTypeOfSymbol(p);
+                        if (t.flags & 134217728 /* ContainsWideningType */) {
+                            if (!reportWideningErrorsInType(t)) {
+                                error(p.valueDeclaration, ts.Diagnostics.Object_literal_s_property_0_implicitly_has_an_1_type, symbolToString(p), typeToString(getWidenedType(t)));
+                            }
+                            errorReported = true;
+                        }
+                    }
+                }
+            }
+            return errorReported;
+        }
+        function reportImplicitAnyError(declaration, type) {
+            var typeAsString = typeToString(getWidenedType(type));
+            var diagnostic;
+            switch (declaration.kind) {
+                case 200 /* BinaryExpression */:
+                case 152 /* PropertyDeclaration */:
+                case 151 /* PropertySignature */:
+                    diagnostic = ts.Diagnostics.Member_0_implicitly_has_an_1_type;
+                    break;
+                case 149 /* Parameter */:
+                    diagnostic = declaration.dotDotDotToken ?
+                        ts.Diagnostics.Rest_parameter_0_implicitly_has_an_any_type :
+                        ts.Diagnostics.Parameter_0_implicitly_has_an_1_type;
+                    break;
+                case 182 /* BindingElement */:
+                    diagnostic = ts.Diagnostics.Binding_element_0_implicitly_has_an_1_type;
+                    break;
+                case 234 /* FunctionDeclaration */:
+                case 154 /* MethodDeclaration */:
+                case 153 /* MethodSignature */:
+                case 156 /* GetAccessor */:
+                case 157 /* SetAccessor */:
+                case 192 /* FunctionExpression */:
+                case 193 /* ArrowFunction */:
+                    if (!declaration.name) {
+                        error(declaration, ts.Diagnostics.Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type, typeAsString);
+                        return;
+                    }
+                    diagnostic = ts.Diagnostics._0_which_lacks_return_type_annotation_implicitly_has_an_1_return_type;
+                    break;
+                case 177 /* MappedType */:
+                    error(declaration, ts.Diagnostics.Mapped_object_type_implicitly_has_an_any_template_type);
+                    return;
+                default:
+                    diagnostic = ts.Diagnostics.Variable_0_implicitly_has_an_1_type;
+            }
+            error(declaration, diagnostic, ts.declarationNameToString(ts.getNameOfDeclaration(declaration)), typeAsString);
+        }
+        function reportErrorsFromWidening(declaration, type) {
+            if (produceDiagnostics && noImplicitAny && type.flags & 134217728 /* ContainsWideningType */) {
+                // Report implicit any error within type if possible, otherwise report error on declaration
+                if (!reportWideningErrorsInType(type)) {
+                    reportImplicitAnyError(declaration, type);
+                }
+            }
+        }
+        function forEachMatchingParameterType(source, target, callback) {
+            var sourceMax = source.parameters.length;
+            var targetMax = target.parameters.length;
+            var count;
+            if (source.hasRestParameter && target.hasRestParameter) {
+                count = Math.max(sourceMax, targetMax);
+            }
+            else if (source.hasRestParameter) {
+                count = targetMax;
+            }
+            else if (target.hasRestParameter) {
+                count = sourceMax;
+            }
+            else {
+                count = Math.min(sourceMax, targetMax);
+            }
+            for (var i = 0; i < count; i++) {
+                callback(getTypeAtPosition(source, i), getTypeAtPosition(target, i));
+            }
+        }
+        function createInferenceContext(typeParameters, signature, flags, compareTypes, baseInferences) {
+            var inferences = baseInferences ? baseInferences.map(cloneInferenceInfo) : typeParameters.map(createInferenceInfo);
+            var context = mapper;
+            context.typeParameters = typeParameters;
+            context.signature = signature;
+            context.inferences = inferences;
+            context.flags = flags;
+            context.compareTypes = compareTypes || compareTypesAssignable;
+            return context;
+            function mapper(t) {
+                for (var i = 0; i < inferences.length; i++) {
+                    if (t === inferences[i].typeParameter) {
+                        inferences[i].isFixed = true;
+                        return getInferredType(context, i);
+                    }
+                }
+                return t;
+            }
+        }
+        function createInferenceInfo(typeParameter) {
+            return {
+                typeParameter: typeParameter,
+                candidates: undefined,
+                contraCandidates: undefined,
+                inferredType: undefined,
+                priority: undefined,
+                topLevel: true,
+                isFixed: false
+            };
+        }
+        function cloneInferenceInfo(inference) {
+            return {
+                typeParameter: inference.typeParameter,
+                candidates: inference.candidates && inference.candidates.slice(),
+                contraCandidates: inference.contraCandidates && inference.contraCandidates.slice(),
+                inferredType: inference.inferredType,
+                priority: inference.priority,
+                topLevel: inference.topLevel,
+                isFixed: inference.isFixed
+            };
+        }
+        // Return true if the given type could possibly reference a type parameter for which
+        // we perform type inference (i.e. a type parameter of a generic function). We cache
+        // results for union and intersection types for performance reasons.
+        function couldContainTypeVariables(type) {
+            var objectFlags = ts.getObjectFlags(type);
+            return !!(type.flags & 15794176 /* Instantiable */ ||
+                objectFlags & 4 /* Reference */ && ts.forEach(type.typeArguments, couldContainTypeVariables) ||
+                objectFlags & 16 /* Anonymous */ && type.symbol && type.symbol.flags & (16 /* Function */ | 8192 /* Method */ | 2048 /* TypeLiteral */ | 32 /* Class */) ||
+                objectFlags & 32 /* Mapped */ ||
+                type.flags & 786432 /* UnionOrIntersection */ && couldUnionOrIntersectionContainTypeVariables(type));
+        }
+        function couldUnionOrIntersectionContainTypeVariables(type) {
+            if (type.couldContainTypeVariables === undefined) {
+                type.couldContainTypeVariables = ts.some(type.types, couldContainTypeVariables);
+            }
+            return type.couldContainTypeVariables;
+        }
+        function isTypeParameterAtTopLevel(type, typeParameter) {
+            return type === typeParameter || !!(type.flags & 786432 /* UnionOrIntersection */) && ts.some(type.types, function (t) { return isTypeParameterAtTopLevel(t, typeParameter); });
+        }
+        /** Create an object with properties named in the string literal type. Every property has type `any` */
+        function createEmptyObjectTypeFromStringLiteral(type) {
+            var members = ts.createSymbolTable();
+            forEachType(type, function (t) {
+                if (!(t.flags & 64 /* StringLiteral */)) {
+                    return;
+                }
+                var name = ts.escapeLeadingUnderscores(t.value);
+                var literalProp = createSymbol(4 /* Property */, name);
+                literalProp.type = anyType;
+                if (t.symbol) {
+                    literalProp.declarations = t.symbol.declarations;
+                    literalProp.valueDeclaration = t.symbol.valueDeclaration;
+                }
+                members.set(name, literalProp);
+            });
+            var indexInfo = type.flags & 4 /* String */ ? createIndexInfo(emptyObjectType, /*isReadonly*/ false) : undefined;
+            return createAnonymousType(undefined, members, ts.emptyArray, ts.emptyArray, indexInfo, undefined);
+        }
+        /**
+         * Infer a suitable input type for a homomorphic mapped type { [P in keyof T]: X }. We construct
+         * an object type with the same set of properties as the source type, where the type of each
+         * property is computed by inferring from the source property type to X for the type
+         * variable T[P] (i.e. we treat the type T[P] as the type variable we're inferring for).
+         */
+        function inferTypeForHomomorphicMappedType(source, target) {
+            var key = source.id + "," + target.id;
+            if (reverseMappedCache.has(key)) {
+                return reverseMappedCache.get(key);
+            }
+            reverseMappedCache.set(key, undefined);
+            var type = createReverseMappedType(source, target);
+            reverseMappedCache.set(key, type);
+            return type;
+        }
+        function createReverseMappedType(source, target) {
+            var properties = getPropertiesOfType(source);
+            if (properties.length === 0 && !getIndexInfoOfType(source, 0 /* String */)) {
+                return undefined;
+            }
+            // If any property contains context sensitive functions that have been skipped, the source type
+            // is incomplete and we can't infer a meaningful input type.
+            for (var _i = 0, properties_4 = properties; _i < properties_4.length; _i++) {
+                var prop = properties_4[_i];
+                if (getTypeOfSymbol(prop).flags & 536870912 /* ContainsAnyFunctionType */) {
+                    return undefined;
+                }
+            }
+            var reversed = createObjectType(2048 /* ReverseMapped */ | 16 /* Anonymous */, /*symbol*/ undefined);
+            reversed.source = source;
+            reversed.mappedType = target;
+            return reversed;
+        }
+        function getTypeOfReverseMappedSymbol(symbol) {
+            return inferReverseMappedType(symbol.propertyType, symbol.mappedType);
+        }
+        function inferReverseMappedType(sourceType, target) {
+            var typeParameter = getIndexedAccessType(getConstraintTypeFromMappedType(target).type, getTypeParameterFromMappedType(target));
+            var templateType = getTemplateTypeFromMappedType(target);
+            var inference = createInferenceInfo(typeParameter);
+            inferTypes([inference], sourceType, templateType);
+            return getTypeFromInference(inference);
+        }
+        function getUnmatchedProperty(source, target, requireOptionalProperties) {
+            var properties = target.flags & 524288 /* Intersection */ ? getPropertiesOfUnionOrIntersectionType(target) : getPropertiesOfObjectType(target);
+            for (var _i = 0, properties_5 = properties; _i < properties_5.length; _i++) {
+                var targetProp = properties_5[_i];
+                if (requireOptionalProperties || !(targetProp.flags & 16777216 /* Optional */)) {
+                    var sourceProp = getPropertyOfType(source, targetProp.escapedName);
+                    if (!sourceProp) {
+                        return targetProp;
+                    }
+                }
+            }
+            return undefined;
+        }
+        function typesDefinitelyUnrelated(source, target) {
+            // Two tuple types with different arity are definitely unrelated.
+            // Two object types that each have a property that is unmatched in the other are definitely unrelated.
+            return isTupleType(source) && isTupleType(target) && getTypeReferenceArity(source) !== getTypeReferenceArity(target) ||
+                !!getUnmatchedProperty(source, target, /*requireOptionalProperties*/ false) && !!getUnmatchedProperty(target, source, /*requireOptionalProperties*/ false);
+        }
+        function getTypeFromInference(inference) {
+            return inference.candidates ? getUnionType(inference.candidates, 2 /* Subtype */) :
+                inference.contraCandidates ? getIntersectionType(inference.contraCandidates) :
+                    emptyObjectType;
+        }
+        function inferTypes(inferences, originalSource, originalTarget, priority) {
+            if (priority === void 0) { priority = 0; }
+            var symbolStack;
+            var visited;
+            var contravariant = false;
+            var propagationType;
+            inferFromTypes(originalSource, originalTarget);
+            function inferFromTypes(source, target) {
+                if (!couldContainTypeVariables(target)) {
+                    return;
+                }
+                if (source === wildcardType) {
+                    // We are inferring from an 'any' type. We want to infer this type for every type parameter
+                    // referenced in the target type, so we record it as the propagation type and infer from the
+                    // target to itself. Then, as we find candidates we substitute the propagation type.
+                    var savePropagationType = propagationType;
+                    propagationType = source;
+                    inferFromTypes(target, target);
+                    propagationType = savePropagationType;
+                    return;
+                }
+                if (source.aliasSymbol && source.aliasTypeArguments && source.aliasSymbol === target.aliasSymbol) {
+                    // Source and target are types originating in the same generic type alias declaration.
+                    // Simply infer from source type arguments to target type arguments.
+                    var sourceTypes = source.aliasTypeArguments;
+                    var targetTypes = target.aliasTypeArguments;
+                    for (var i = 0; i < sourceTypes.length; i++) {
+                        inferFromTypes(sourceTypes[i], targetTypes[i]);
+                    }
+                    return;
+                }
+                if (source.flags & 262144 /* Union */ && target.flags & 262144 /* Union */ && !(source.flags & 512 /* EnumLiteral */ && target.flags & 512 /* EnumLiteral */) ||
+                    source.flags & 524288 /* Intersection */ && target.flags & 524288 /* Intersection */) {
+                    // Source and target are both unions or both intersections. If source and target
+                    // are the same type, just relate each constituent type to itself.
+                    if (source === target) {
+                        for (var _i = 0, _a = source.types; _i < _a.length; _i++) {
+                            var t = _a[_i];
+                            inferFromTypes(t, t);
+                        }
+                        return;
+                    }
+                    // Find each source constituent type that has an identically matching target constituent
+                    // type, and for each such type infer from the type to itself. When inferring from a
+                    // type to itself we effectively find all type parameter occurrences within that type
+                    // and infer themselves as their type arguments. We have special handling for numeric
+                    // and string literals because the number and string types are not represented as unions
+                    // of all their possible values.
+                    var matchingTypes = void 0;
+                    for (var _b = 0, _c = source.types; _b < _c.length; _b++) {
+                        var t = _c[_b];
+                        if (typeIdenticalToSomeType(t, target.types)) {
+                            (matchingTypes || (matchingTypes = [])).push(t);
+                            inferFromTypes(t, t);
+                        }
+                        else if (t.flags & (128 /* NumberLiteral */ | 64 /* StringLiteral */)) {
+                            var b = getBaseTypeOfLiteralType(t);
+                            if (typeIdenticalToSomeType(b, target.types)) {
+                                (matchingTypes || (matchingTypes = [])).push(t, b);
+                            }
+                        }
+                    }
+                    // Next, to improve the quality of inferences, reduce the source and target types by
+                    // removing the identically matched constituents. For example, when inferring from
+                    // 'string | string[]' to 'string | T' we reduce the types to 'string[]' and 'T'.
+                    if (matchingTypes) {
+                        source = removeTypesFromUnionOrIntersection(source, matchingTypes);
+                        target = removeTypesFromUnionOrIntersection(target, matchingTypes);
+                    }
+                }
+                if (target.flags & 2162688 /* TypeVariable */) {
+                    // If target is a type parameter, make an inference, unless the source type contains
+                    // the anyFunctionType (the wildcard type that's used to avoid contextually typing functions).
+                    // Because the anyFunctionType is internal, it should not be exposed to the user by adding
+                    // it as an inference candidate. Hopefully, a better candidate will come along that does
+                    // not contain anyFunctionType when we come back to this argument for its second round
+                    // of inference. Also, we exclude inferences for silentNeverType (which is used as a wildcard
+                    // when constructing types from type parameters that had no inference candidates).
+                    if (source.flags & 536870912 /* ContainsAnyFunctionType */ || source === silentNeverType) {
+                        return;
+                    }
+                    var inference = getInferenceInfoForType(target);
+                    if (inference) {
+                        if (!inference.isFixed) {
+                            if (inference.priority === undefined || priority < inference.priority) {
+                                inference.candidates = undefined;
+                                inference.contraCandidates = undefined;
+                                inference.priority = priority;
+                            }
+                            if (priority === inference.priority) {
+                                var candidate = propagationType || source;
+                                if (contravariant) {
+                                    inference.contraCandidates = ts.append(inference.contraCandidates, candidate);
+                                }
+                                else {
+                                    inference.candidates = ts.append(inference.candidates, candidate);
+                                }
+                            }
+                            if (!(priority & 8 /* ReturnType */) && target.flags & 65536 /* TypeParameter */ && !isTypeParameterAtTopLevel(originalTarget, target)) {
+                                inference.topLevel = false;
+                            }
+                        }
+                        return;
+                    }
+                }
+                if (ts.getObjectFlags(source) & 4 /* Reference */ && ts.getObjectFlags(target) & 4 /* Reference */ && source.target === target.target) {
+                    // If source and target are references to the same generic type, infer from type arguments
+                    var sourceTypes = source.typeArguments || ts.emptyArray;
+                    var targetTypes = target.typeArguments || ts.emptyArray;
+                    var count = sourceTypes.length < targetTypes.length ? sourceTypes.length : targetTypes.length;
+                    var variances = getVariances(source.target);
+                    for (var i = 0; i < count; i++) {
+                        if (i < variances.length && variances[i] === 2 /* Contravariant */) {
+                            inferFromContravariantTypes(sourceTypes[i], targetTypes[i]);
+                        }
+                        else {
+                            inferFromTypes(sourceTypes[i], targetTypes[i]);
+                        }
+                    }
+                }
+                else if (source.flags & 1048576 /* Index */ && target.flags & 1048576 /* Index */) {
+                    contravariant = !contravariant;
+                    inferFromTypes(source.type, target.type);
+                    contravariant = !contravariant;
+                }
+                else if ((isLiteralType(source) || source.flags & 4 /* String */) && target.flags & 1048576 /* Index */) {
+                    var empty = createEmptyObjectTypeFromStringLiteral(source);
+                    contravariant = !contravariant;
+                    var savePriority = priority;
+                    priority |= 16 /* LiteralKeyof */;
+                    inferFromTypes(empty, target.type);
+                    priority = savePriority;
+                    contravariant = !contravariant;
+                }
+                else if (source.flags & 2097152 /* IndexedAccess */ && target.flags & 2097152 /* IndexedAccess */) {
+                    inferFromTypes(source.objectType, target.objectType);
+                    inferFromTypes(source.indexType, target.indexType);
+                }
+                else if (source.flags & 4194304 /* Conditional */ && target.flags & 4194304 /* Conditional */) {
+                    inferFromTypes(source.checkType, target.checkType);
+                    inferFromTypes(source.extendsType, target.extendsType);
+                    inferFromTypes(getTrueTypeFromConditionalType(source), getTrueTypeFromConditionalType(target));
+                    inferFromTypes(getFalseTypeFromConditionalType(source), getFalseTypeFromConditionalType(target));
+                }
+                else if (target.flags & 786432 /* UnionOrIntersection */) {
+                    var targetTypes = target.types;
+                    var typeVariableCount = 0;
+                    var typeVariable = void 0;
+                    // First infer to each type in union or intersection that isn't a type variable
+                    for (var _d = 0, targetTypes_3 = targetTypes; _d < targetTypes_3.length; _d++) {
+                        var t = targetTypes_3[_d];
+                        if (getInferenceInfoForType(t)) {
+                            typeVariable = t;
+                            typeVariableCount++;
+                        }
+                        else {
+                            inferFromTypes(source, t);
+                        }
+                    }
+                    // Next, if target containings a single naked type variable, make a secondary inference to that type
+                    // variable. This gives meaningful results for union types in co-variant positions and intersection
+                    // types in contra-variant positions (such as callback parameters).
+                    if (typeVariableCount === 1) {
+                        var savePriority = priority;
+                        priority |= 1 /* NakedTypeVariable */;
+                        inferFromTypes(source, typeVariable);
+                        priority = savePriority;
+                    }
+                }
+                else if (source.flags & 262144 /* Union */) {
+                    // Source is a union or intersection type, infer from each constituent type
+                    var sourceTypes = source.types;
+                    for (var _e = 0, sourceTypes_3 = sourceTypes; _e < sourceTypes_3.length; _e++) {
+                        var sourceType = sourceTypes_3[_e];
+                        inferFromTypes(sourceType, target);
+                    }
+                }
+                else {
+                    if (!(priority & 32 /* NoConstraints */ && source.flags & (524288 /* Intersection */ | 15794176 /* Instantiable */))) {
+                        source = getApparentType(source);
+                    }
+                    if (source.flags & (131072 /* Object */ | 524288 /* Intersection */)) {
+                        var key = source.id + "," + target.id;
+                        if (visited && visited.get(key)) {
+                            return;
+                        }
+                        (visited || (visited = ts.createMap())).set(key, true);
+                        // If we are already processing another target type with the same associated symbol (such as
+                        // an instantiation of the same generic type), we do not explore this target as it would yield
+                        // no further inferences. We exclude the static side of classes from this check since it shares
+                        // its symbol with the instance side which would lead to false positives.
+                        var isNonConstructorObject = target.flags & 131072 /* Object */ &&
+                            !(ts.getObjectFlags(target) & 16 /* Anonymous */ && target.symbol && target.symbol.flags & 32 /* Class */);
+                        var symbol = isNonConstructorObject ? target.symbol : undefined;
+                        if (symbol) {
+                            if (ts.contains(symbolStack, symbol)) {
+                                return;
+                            }
+                            (symbolStack || (symbolStack = [])).push(symbol);
+                            inferFromObjectTypes(source, target);
+                            symbolStack.pop();
+                        }
+                        else {
+                            inferFromObjectTypes(source, target);
+                        }
+                    }
+                }
+            }
+            function inferFromContravariantTypes(source, target) {
+                if (strictFunctionTypes || priority & 64 /* AlwaysStrict */) {
+                    contravariant = !contravariant;
+                    inferFromTypes(source, target);
+                    contravariant = !contravariant;
+                }
+                else {
+                    inferFromTypes(source, target);
+                }
+            }
+            function getInferenceInfoForType(type) {
+                if (type.flags & 2162688 /* TypeVariable */) {
+                    for (var _i = 0, inferences_1 = inferences; _i < inferences_1.length; _i++) {
+                        var inference = inferences_1[_i];
+                        if (type === inference.typeParameter) {
+                            return inference;
+                        }
+                    }
+                }
+                return undefined;
+            }
+            function inferFromObjectTypes(source, target) {
+                if (isGenericMappedType(source) && isGenericMappedType(target)) {
+                    // The source and target types are generic types { [P in S]: X } and { [P in T]: Y }, so we infer
+                    // from S to T and from X to Y.
+                    inferFromTypes(getConstraintTypeFromMappedType(source), getConstraintTypeFromMappedType(target));
+                    inferFromTypes(getTemplateTypeFromMappedType(source), getTemplateTypeFromMappedType(target));
+                }
+                if (ts.getObjectFlags(target) & 32 /* Mapped */) {
+                    var constraintType = getConstraintTypeFromMappedType(target);
+                    if (constraintType.flags & 1048576 /* Index */) {
+                        // We're inferring from some source type S to a homomorphic mapped type { [P in keyof T]: X },
+                        // where T is a type variable. Use inferTypeForHomomorphicMappedType to infer a suitable source
+                        // type and then make a secondary inference from that type to T. We make a secondary inference
+                        // such that direct inferences to T get priority over inferences to Partial<T>, for example.
+                        var inference = getInferenceInfoForType(constraintType.type);
+                        if (inference && !inference.isFixed) {
+                            var inferredType = inferTypeForHomomorphicMappedType(source, target);
+                            if (inferredType) {
+                                var savePriority = priority;
+                                priority |= 2 /* HomomorphicMappedType */;
+                                inferFromTypes(inferredType, inference.typeParameter);
+                                priority = savePriority;
+                            }
+                        }
+                        return;
+                    }
+                    if (constraintType.flags & 65536 /* TypeParameter */) {
+                        // We're inferring from some source type S to a mapped type { [P in T]: X }, where T is a type
+                        // parameter. Infer from 'keyof S' to T and infer from a union of each property type in S to X.
+                        var savePriority = priority;
+                        priority |= 4 /* MappedTypeConstraint */;
+                        inferFromTypes(getIndexType(source), constraintType);
+                        priority = savePriority;
+                        inferFromTypes(getUnionType(ts.map(getPropertiesOfType(source), getTypeOfSymbol)), getTemplateTypeFromMappedType(target));
+                        return;
+                    }
+                }
+                // Infer from the members of source and target only if the two types are possibly related
+                if (!typesDefinitelyUnrelated(source, target)) {
+                    inferFromProperties(source, target);
+                    inferFromSignatures(source, target, 0 /* Call */);
+                    inferFromSignatures(source, target, 1 /* Construct */);
+                    inferFromIndexTypes(source, target);
+                }
+            }
+            function inferFromProperties(source, target) {
+                var properties = getPropertiesOfObjectType(target);
+                for (var _i = 0, properties_6 = properties; _i < properties_6.length; _i++) {
+                    var targetProp = properties_6[_i];
+                    var sourceProp = getPropertyOfType(source, targetProp.escapedName);
+                    if (sourceProp) {
+                        inferFromTypes(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp));
+                    }
+                }
+            }
+            function inferFromSignatures(source, target, kind) {
+                var sourceSignatures = getSignaturesOfType(source, kind);
+                var targetSignatures = getSignaturesOfType(target, kind);
+                var sourceLen = sourceSignatures.length;
+                var targetLen = targetSignatures.length;
+                var len = sourceLen < targetLen ? sourceLen : targetLen;
+                for (var i = 0; i < len; i++) {
+                    inferFromSignature(getBaseSignature(sourceSignatures[sourceLen - len + i]), getBaseSignature(targetSignatures[targetLen - len + i]));
+                }
+            }
+            function inferFromSignature(source, target) {
+                forEachMatchingParameterType(source, target, inferFromContravariantTypes);
+                var sourceTypePredicate = getTypePredicateOfSignature(source);
+                var targetTypePredicate = getTypePredicateOfSignature(target);
+                if (sourceTypePredicate && targetTypePredicate && sourceTypePredicate.kind === targetTypePredicate.kind) {
+                    inferFromTypes(sourceTypePredicate.type, targetTypePredicate.type);
+                }
+                else {
+                    inferFromTypes(getReturnTypeOfSignature(source), getReturnTypeOfSignature(target));
+                }
+            }
+            function inferFromIndexTypes(source, target) {
+                var targetStringIndexType = getIndexTypeOfType(target, 0 /* String */);
+                if (targetStringIndexType) {
+                    var sourceIndexType = getIndexTypeOfType(source, 0 /* String */) ||
+                        getImplicitIndexTypeOfType(source, 0 /* String */);
+                    if (sourceIndexType) {
+                        inferFromTypes(sourceIndexType, targetStringIndexType);
+                    }
+                }
+                var targetNumberIndexType = getIndexTypeOfType(target, 1 /* Number */);
+                if (targetNumberIndexType) {
+                    var sourceIndexType = getIndexTypeOfType(source, 1 /* Number */) ||
+                        getIndexTypeOfType(source, 0 /* String */) ||
+                        getImplicitIndexTypeOfType(source, 1 /* Number */);
+                    if (sourceIndexType) {
+                        inferFromTypes(sourceIndexType, targetNumberIndexType);
+                    }
+                }
+            }
+        }
+        function typeIdenticalToSomeType(type, types) {
+            for (var _i = 0, types_11 = types; _i < types_11.length; _i++) {
+                var t = types_11[_i];
+                if (isTypeIdenticalTo(t, type)) {
+                    return true;
+                }
+            }
+            return false;
+        }
+        /**
+         * Return a new union or intersection type computed by removing a given set of types
+         * from a given union or intersection type.
+         */
+        function removeTypesFromUnionOrIntersection(type, typesToRemove) {
+            var reducedTypes = [];
+            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                var t = _a[_i];
+                if (!typeIdenticalToSomeType(t, typesToRemove)) {
+                    reducedTypes.push(t);
+                }
+            }
+            return type.flags & 262144 /* Union */ ? getUnionType(reducedTypes) : getIntersectionType(reducedTypes);
+        }
+        function hasPrimitiveConstraint(type) {
+            var constraint = getConstraintOfTypeParameter(type);
+            return !!constraint && maybeTypeOfKind(constraint, 32764 /* Primitive */ | 1048576 /* Index */);
+        }
+        function isObjectLiteralType(type) {
+            return !!(ts.getObjectFlags(type) & 128 /* ObjectLiteral */);
+        }
+        function widenObjectLiteralCandidates(candidates) {
+            if (candidates.length > 1) {
+                var objectLiterals = ts.filter(candidates, isObjectLiteralType);
+                if (objectLiterals.length) {
+                    var objectLiteralsType = getWidenedType(getUnionType(objectLiterals, 2 /* Subtype */));
+                    return ts.concatenate(ts.filter(candidates, function (t) { return !isObjectLiteralType(t); }), [objectLiteralsType]);
+                }
+            }
+            return candidates;
+        }
+        function getContravariantInference(inference) {
+            return inference.priority & 28 /* PriorityImpliesCombination */ ? getIntersectionType(inference.contraCandidates) : getCommonSubtype(inference.contraCandidates);
+        }
+        function getCovariantInference(inference, context, signature) {
+            // Extract all object literal types and replace them with a single widened and normalized type.
+            var candidates = widenObjectLiteralCandidates(inference.candidates);
+            // We widen inferred literal types if
+            // all inferences were made to top-level occurrences of the type parameter, and
+            // the type parameter has no constraint or its constraint includes no primitive or literal types, and
+            // the type parameter was fixed during inference or does not occur at top-level in the return type.
+            var primitiveConstraint = hasPrimitiveConstraint(inference.typeParameter);
+            var widenLiteralTypes = !primitiveConstraint && inference.topLevel &&
+                (inference.isFixed || !isTypeParameterAtTopLevel(getReturnTypeOfSignature(signature), inference.typeParameter));
+            var baseCandidates = primitiveConstraint ? ts.sameMap(candidates, getRegularTypeOfLiteralType) :
+                widenLiteralTypes ? ts.sameMap(candidates, getWidenedLiteralType) :
+                    candidates;
+            // If all inferences were made from contravariant positions, infer a common subtype. Otherwise, if
+            // union types were requested or if all inferences were made from the return type position, infer a
+            // union type. Otherwise, infer a common supertype.
+            var unwidenedType = context.flags & 1 /* InferUnionTypes */ || inference.priority & 28 /* PriorityImpliesCombination */ ?
+                getUnionType(baseCandidates, 2 /* Subtype */) :
+                getCommonSupertype(baseCandidates);
+            return getWidenedType(unwidenedType);
+        }
+        function getInferredType(context, index) {
+            var inference = context.inferences[index];
+            var inferredType = inference.inferredType;
+            if (!inferredType) {
+                var signature = context.signature;
+                if (signature) {
+                    if (inference.candidates) {
+                        inferredType = getCovariantInference(inference, context, signature);
+                        // If we have inferred 'never' but have contravariant candidates. To get a more specific type we
+                        // infer from the contravariant candidates instead.
+                        if (inferredType.flags & 32768 /* Never */ && inference.contraCandidates) {
+                            inferredType = getContravariantInference(inference);
+                        }
+                    }
+                    else if (inference.contraCandidates) {
+                        // We only have contravariant inferences, infer the best common subtype of those
+                        inferredType = getContravariantInference(inference);
+                    }
+                    else if (context.flags & 2 /* NoDefault */) {
+                        // We use silentNeverType as the wildcard that signals no inferences.
+                        inferredType = silentNeverType;
+                    }
+                    else {
+                        // Infer either the default or the empty object type when no inferences were
+                        // made. It is important to remember that in this case, inference still
+                        // succeeds, meaning there is no error for not having inference candidates. An
+                        // inference error only occurs when there are *conflicting* candidates, i.e.
+                        // candidates with no common supertype.
+                        var defaultType = getDefaultFromTypeParameter(inference.typeParameter);
+                        if (defaultType) {
+                            // Instantiate the default type. Any forward reference to a type
+                            // parameter should be instantiated to the empty object type.
+                            inferredType = instantiateType(defaultType, combineTypeMappers(createBackreferenceMapper(context.signature.typeParameters, index), context));
+                        }
+                        else {
+                            inferredType = getDefaultTypeArgumentType(!!(context.flags & 4 /* AnyDefault */));
+                        }
+                    }
+                }
+                else {
+                    inferredType = getTypeFromInference(inference);
+                }
+                inference.inferredType = inferredType;
+                var constraint = getConstraintOfTypeParameter(inference.typeParameter);
+                if (constraint) {
+                    var instantiatedConstraint = instantiateType(constraint, context);
+                    if (!context.compareTypes(inferredType, getTypeWithThisArgument(instantiatedConstraint, inferredType))) {
+                        inference.inferredType = inferredType = instantiatedConstraint;
+                    }
+                }
+            }
+            return inferredType;
+        }
+        function getDefaultTypeArgumentType(isInJavaScriptFile) {
+            return isInJavaScriptFile ? anyType : emptyObjectType;
+        }
+        function getInferredTypes(context) {
+            var result = [];
+            for (var i = 0; i < context.inferences.length; i++) {
+                result.push(getInferredType(context, i));
+            }
+            return result;
+        }
+        // EXPRESSION TYPE CHECKING
+        function getResolvedSymbol(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedSymbol) {
+                links.resolvedSymbol = !ts.nodeIsMissing(node) &&
+                    resolveName(node, node.escapedText, 67216319 /* Value */ | 1048576 /* ExportValue */, ts.Diagnostics.Cannot_find_name_0, node, !ts.isWriteOnlyAccess(node), 
+                    /*excludeGlobals*/ false, ts.Diagnostics.Cannot_find_name_0_Did_you_mean_1) || unknownSymbol;
+            }
+            return links.resolvedSymbol;
+        }
+        function isInTypeQuery(node) {
+            // TypeScript 1.0 spec (April 2014): 3.6.3
+            // A type query consists of the keyword typeof followed by an expression.
+            // The expression is restricted to a single identifier or a sequence of identifiers separated by periods
+            return !!ts.findAncestor(node, function (n) { return n.kind === 165 /* TypeQuery */ ? true : n.kind === 71 /* Identifier */ || n.kind === 146 /* QualifiedName */ ? false : "quit"; });
+        }
+        // Return the flow cache key for a "dotted name" (i.e. a sequence of identifiers
+        // separated by dots). The key consists of the id of the symbol referenced by the
+        // leftmost identifier followed by zero or more property names separated by dots.
+        // The result is undefined if the reference isn't a dotted name. We prefix nodes
+        // occurring in an apparent type position with '@' because the control flow type
+        // of such nodes may be based on the apparent type instead of the declared type.
+        function getFlowCacheKey(node) {
+            if (node.kind === 71 /* Identifier */) {
+                var symbol = getResolvedSymbol(node);
+                return symbol !== unknownSymbol ? (isConstraintPosition(node) ? "@" : "") + getSymbolId(symbol) : undefined;
+            }
+            if (node.kind === 99 /* ThisKeyword */) {
+                return "0";
+            }
+            if (node.kind === 185 /* PropertyAccessExpression */) {
+                var key = getFlowCacheKey(node.expression);
+                return key && key + "." + ts.idText(node.name);
+            }
+            if (node.kind === 182 /* BindingElement */) {
+                var container = node.parent.parent;
+                var key = container.kind === 182 /* BindingElement */ ? getFlowCacheKey(container) : (container.initializer && getFlowCacheKey(container.initializer));
+                var text = getBindingElementNameText(node);
+                var result = key && text && (key + "." + text);
+                return result;
+            }
+            return undefined;
+        }
+        function getBindingElementNameText(element) {
+            var parent = element.parent;
+            if (parent.kind === 180 /* ObjectBindingPattern */) {
+                var name = element.propertyName || element.name;
+                switch (name.kind) {
+                    case 71 /* Identifier */:
+                        return ts.idText(name);
+                    case 147 /* ComputedPropertyName */:
+                        return ts.isStringOrNumericLiteral(name.expression) ? name.expression.text : undefined;
+                    case 9 /* StringLiteral */:
+                    case 8 /* NumericLiteral */:
+                        return name.text;
+                    default:
+                        // Per types, array and object binding patterns remain, however they should never be present if propertyName is not defined
+                        ts.Debug.fail("Unexpected name kind for binding element name");
+                }
+            }
+            else {
+                return "" + parent.elements.indexOf(element);
+            }
+        }
+        function isMatchingReference(source, target) {
+            switch (source.kind) {
+                case 71 /* Identifier */:
+                    return target.kind === 71 /* Identifier */ && getResolvedSymbol(source) === getResolvedSymbol(target) ||
+                        (target.kind === 232 /* VariableDeclaration */ || target.kind === 182 /* BindingElement */) &&
+                            getExportSymbolOfValueSymbolIfExported(getResolvedSymbol(source)) === getSymbolOfNode(target);
+                case 99 /* ThisKeyword */:
+                    return target.kind === 99 /* ThisKeyword */;
+                case 97 /* SuperKeyword */:
+                    return target.kind === 97 /* SuperKeyword */;
+                case 185 /* PropertyAccessExpression */:
+                    return target.kind === 185 /* PropertyAccessExpression */ &&
+                        source.name.escapedText === target.name.escapedText &&
+                        isMatchingReference(source.expression, target.expression);
+                case 182 /* BindingElement */:
+                    if (target.kind !== 185 /* PropertyAccessExpression */)
+                        return false;
+                    var t = target;
+                    if (t.name.escapedText !== getBindingElementNameText(source))
+                        return false;
+                    if (source.parent.parent.kind === 182 /* BindingElement */ && isMatchingReference(source.parent.parent, t.expression)) {
+                        return true;
+                    }
+                    if (source.parent.parent.kind === 232 /* VariableDeclaration */) {
+                        var maybeId = source.parent.parent.initializer;
+                        return !!maybeId && isMatchingReference(maybeId, t.expression);
+                    }
+            }
+            return false;
+        }
+        function containsMatchingReference(source, target) {
+            while (source.kind === 185 /* PropertyAccessExpression */) {
+                source = source.expression;
+                if (isMatchingReference(source, target)) {
+                    return true;
+                }
+            }
+            return false;
+        }
+        // Return true if target is a property access xxx.yyy, source is a property access xxx.zzz, the declared
+        // type of xxx is a union type, and yyy is a property that is possibly a discriminant. We consider a property
+        // a possible discriminant if its type differs in the constituents of containing union type, and if every
+        // choice is a unit type or a union of unit types.
+        function containsMatchingReferenceDiscriminant(source, target) {
+            return target.kind === 185 /* PropertyAccessExpression */ &&
+                containsMatchingReference(source, target.expression) &&
+                isDiscriminantProperty(getDeclaredTypeOfReference(target.expression), target.name.escapedText);
+        }
+        function getDeclaredTypeOfReference(expr) {
+            if (expr.kind === 71 /* Identifier */) {
+                return getTypeOfSymbol(getResolvedSymbol(expr));
+            }
+            if (expr.kind === 185 /* PropertyAccessExpression */) {
+                var type = getDeclaredTypeOfReference(expr.expression);
+                return type && getTypeOfPropertyOfType(type, expr.name.escapedText);
+            }
+            return undefined;
+        }
+        function isDiscriminantProperty(type, name) {
+            if (type && type.flags & 262144 /* Union */) {
+                var prop = getUnionOrIntersectionProperty(type, name);
+                if (prop && ts.getCheckFlags(prop) & 2 /* SyntheticProperty */) {
+                    if (prop.isDiscriminantProperty === undefined) {
+                        prop.isDiscriminantProperty = !!(prop.checkFlags & 32 /* HasNonUniformType */) && isLiteralType(getTypeOfSymbol(prop));
+                    }
+                    return prop.isDiscriminantProperty;
+                }
+            }
+            return false;
+        }
+        function findDiscriminantProperties(sourceProperties, target) {
+            var result;
+            for (var _i = 0, sourceProperties_2 = sourceProperties; _i < sourceProperties_2.length; _i++) {
+                var sourceProperty = sourceProperties_2[_i];
+                if (isDiscriminantProperty(target, sourceProperty.escapedName)) {
+                    if (result) {
+                        result.push(sourceProperty);
+                        continue;
+                    }
+                    result = [sourceProperty];
+                }
+            }
+            return result;
+        }
+        function isOrContainsMatchingReference(source, target) {
+            return isMatchingReference(source, target) || containsMatchingReference(source, target);
+        }
+        function hasMatchingArgument(callExpression, reference) {
+            if (callExpression.arguments) {
+                for (var _i = 0, _a = callExpression.arguments; _i < _a.length; _i++) {
+                    var argument = _a[_i];
+                    if (isOrContainsMatchingReference(reference, argument)) {
+                        return true;
+                    }
+                }
+            }
+            if (callExpression.expression.kind === 185 /* PropertyAccessExpression */ &&
+                isOrContainsMatchingReference(reference, callExpression.expression.expression)) {
+                return true;
+            }
+            return false;
+        }
+        function getFlowNodeId(flow) {
+            if (!flow.id) {
+                flow.id = nextFlowId;
+                nextFlowId++;
+            }
+            return flow.id;
+        }
+        function typeMaybeAssignableTo(source, target) {
+            if (!(source.flags & 262144 /* Union */)) {
+                return isTypeAssignableTo(source, target);
+            }
+            for (var _i = 0, _a = source.types; _i < _a.length; _i++) {
+                var t = _a[_i];
+                if (isTypeAssignableTo(t, target)) {
+                    return true;
+                }
+            }
+            return false;
+        }
+        // Remove those constituent types of declaredType to which no constituent type of assignedType is assignable.
+        // For example, when a variable of type number | string | boolean is assigned a value of type number | boolean,
+        // we remove type string.
+        function getAssignmentReducedType(declaredType, assignedType) {
+            if (declaredType !== assignedType) {
+                if (assignedType.flags & 32768 /* Never */) {
+                    return assignedType;
+                }
+                var reducedType = filterType(declaredType, function (t) { return typeMaybeAssignableTo(assignedType, t); });
+                if (!(reducedType.flags & 32768 /* Never */)) {
+                    return reducedType;
+                }
+            }
+            return declaredType;
+        }
+        function getTypeFactsOfTypes(types) {
+            var result = 0 /* None */;
+            for (var _i = 0, types_12 = types; _i < types_12.length; _i++) {
+                var t = types_12[_i];
+                result |= getTypeFacts(t);
+            }
+            return result;
+        }
+        function isFunctionObjectType(type) {
+            // We do a quick check for a "bind" property before performing the more expensive subtype
+            // check. This gives us a quicker out in the common case where an object type is not a function.
+            var resolved = resolveStructuredTypeMembers(type);
+            return !!(resolved.callSignatures.length || resolved.constructSignatures.length ||
+                resolved.members.get("bind") && isTypeSubtypeOf(type, globalFunctionType));
+        }
+        function getTypeFacts(type) {
+            var flags = type.flags;
+            if (flags & 4 /* String */) {
+                return strictNullChecks ? 4079361 /* StringStrictFacts */ : 4194049 /* StringFacts */;
+            }
+            if (flags & 64 /* StringLiteral */) {
+                var isEmpty = type.value === "";
+                return strictNullChecks ?
+                    isEmpty ? 3030785 /* EmptyStringStrictFacts */ : 1982209 /* NonEmptyStringStrictFacts */ :
+                    isEmpty ? 3145473 /* EmptyStringFacts */ : 4194049 /* NonEmptyStringFacts */;
+            }
+            if (flags & (8 /* Number */ | 32 /* Enum */)) {
+                return strictNullChecks ? 4079234 /* NumberStrictFacts */ : 4193922 /* NumberFacts */;
+            }
+            if (flags & 128 /* NumberLiteral */) {
+                var isZero = type.value === 0;
+                return strictNullChecks ?
+                    isZero ? 3030658 /* ZeroStrictFacts */ : 1982082 /* NonZeroStrictFacts */ :
+                    isZero ? 3145346 /* ZeroFacts */ : 4193922 /* NonZeroFacts */;
+            }
+            if (flags & 16 /* Boolean */) {
+                return strictNullChecks ? 4078980 /* BooleanStrictFacts */ : 4193668 /* BooleanFacts */;
+            }
+            if (flags & 272 /* BooleanLike */) {
+                return strictNullChecks ?
+                    type === falseType ? 3030404 /* FalseStrictFacts */ : 1981828 /* TrueStrictFacts */ :
+                    type === falseType ? 3145092 /* FalseFacts */ : 4193668 /* TrueFacts */;
+            }
+            if (flags & 131072 /* Object */) {
+                return isFunctionObjectType(type) ?
+                    strictNullChecks ? 1970144 /* FunctionStrictFacts */ : 4181984 /* FunctionFacts */ :
+                    strictNullChecks ? 1972176 /* ObjectStrictFacts */ : 4184016 /* ObjectFacts */;
+            }
+            if (flags & (4096 /* Void */ | 8192 /* Undefined */)) {
+                return 2457472 /* UndefinedFacts */;
+            }
+            if (flags & 16384 /* Null */) {
+                return 2340752 /* NullFacts */;
+            }
+            if (flags & 3072 /* ESSymbolLike */) {
+                return strictNullChecks ? 1981320 /* SymbolStrictFacts */ : 4193160 /* SymbolFacts */;
+            }
+            if (flags & 16777216 /* NonPrimitive */) {
+                return strictNullChecks ? 1972176 /* ObjectStrictFacts */ : 4184016 /* ObjectFacts */;
+            }
+            if (flags & 15794176 /* Instantiable */) {
+                return getTypeFacts(getBaseConstraintOfType(type) || emptyObjectType);
+            }
+            if (flags & 786432 /* UnionOrIntersection */) {
+                return getTypeFactsOfTypes(type.types);
+            }
+            return 4194303 /* All */;
+        }
+        function getTypeWithFacts(type, include) {
+            return filterType(type, function (t) { return (getTypeFacts(t) & include) !== 0; });
+        }
+        function getTypeWithDefault(type, defaultExpression) {
+            if (defaultExpression) {
+                var defaultType = getTypeOfExpression(defaultExpression);
+                return getUnionType([getTypeWithFacts(type, 131072 /* NEUndefined */), defaultType]);
+            }
+            return type;
+        }
+        function getTypeOfDestructuredProperty(type, name) {
+            var text = ts.getTextOfPropertyName(name);
+            return getConstraintForLocation(getTypeOfPropertyOfType(type, text), name) ||
+                isNumericLiteralName(text) && getIndexTypeOfType(type, 1 /* Number */) ||
+                getIndexTypeOfType(type, 0 /* String */) ||
+                errorType;
+        }
+        function getTypeOfDestructuredArrayElement(type, index) {
+            return isTupleLikeType(type) && getTypeOfPropertyOfType(type, "" + index) ||
+                checkIteratedTypeOrElementType(type, /*errorNode*/ undefined, /*allowStringInput*/ false, /*allowAsyncIterables*/ false) ||
+                errorType;
+        }
+        function getTypeOfDestructuredSpreadExpression(type) {
+            return createArrayType(checkIteratedTypeOrElementType(type, /*errorNode*/ undefined, /*allowStringInput*/ false, /*allowAsyncIterables*/ false) || errorType);
+        }
+        function getAssignedTypeOfBinaryExpression(node) {
+            var isDestructuringDefaultAssignment = node.parent.kind === 183 /* ArrayLiteralExpression */ && isDestructuringAssignmentTarget(node.parent) ||
+                node.parent.kind === 270 /* PropertyAssignment */ && isDestructuringAssignmentTarget(node.parent.parent);
+            return isDestructuringDefaultAssignment ?
+                getTypeWithDefault(getAssignedType(node), node.right) :
+                getTypeOfExpression(node.right);
+        }
+        function isDestructuringAssignmentTarget(parent) {
+            return parent.parent.kind === 200 /* BinaryExpression */ && parent.parent.left === parent ||
+                parent.parent.kind === 222 /* ForOfStatement */ && parent.parent.initializer === parent;
+        }
+        function getAssignedTypeOfArrayLiteralElement(node, element) {
+            return getTypeOfDestructuredArrayElement(getAssignedType(node), node.elements.indexOf(element));
+        }
+        function getAssignedTypeOfSpreadExpression(node) {
+            return getTypeOfDestructuredSpreadExpression(getAssignedType(node.parent));
+        }
+        function getAssignedTypeOfPropertyAssignment(node) {
+            return getTypeOfDestructuredProperty(getAssignedType(node.parent), node.name);
+        }
+        function getAssignedTypeOfShorthandPropertyAssignment(node) {
+            return getTypeWithDefault(getAssignedTypeOfPropertyAssignment(node), node.objectAssignmentInitializer);
+        }
+        function getAssignedType(node) {
+            var parent = node.parent;
+            switch (parent.kind) {
+                case 221 /* ForInStatement */:
+                    return stringType;
+                case 222 /* ForOfStatement */:
+                    return checkRightHandSideOfForOf(parent.expression, parent.awaitModifier) || errorType;
+                case 200 /* BinaryExpression */:
+                    return getAssignedTypeOfBinaryExpression(parent);
+                case 194 /* DeleteExpression */:
+                    return undefinedType;
+                case 183 /* ArrayLiteralExpression */:
+                    return getAssignedTypeOfArrayLiteralElement(parent, node);
+                case 204 /* SpreadElement */:
+                    return getAssignedTypeOfSpreadExpression(parent);
+                case 270 /* PropertyAssignment */:
+                    return getAssignedTypeOfPropertyAssignment(parent);
+                case 271 /* ShorthandPropertyAssignment */:
+                    return getAssignedTypeOfShorthandPropertyAssignment(parent);
+            }
+            return errorType;
+        }
+        function getInitialTypeOfBindingElement(node) {
+            var pattern = node.parent;
+            var parentType = getInitialType(pattern.parent);
+            var type = pattern.kind === 180 /* ObjectBindingPattern */ ?
+                getTypeOfDestructuredProperty(parentType, node.propertyName || node.name) :
+                !node.dotDotDotToken ?
+                    getTypeOfDestructuredArrayElement(parentType, pattern.elements.indexOf(node)) :
+                    getTypeOfDestructuredSpreadExpression(parentType);
+            return getTypeWithDefault(type, node.initializer);
+        }
+        function getTypeOfInitializer(node) {
+            // Return the cached type if one is available. If the type of the variable was inferred
+            // from its initializer, we'll already have cached the type. Otherwise we compute it now
+            // without caching such that transient types are reflected.
+            var links = getNodeLinks(node);
+            return links.resolvedType || getTypeOfExpression(node);
+        }
+        function getInitialTypeOfVariableDeclaration(node) {
+            if (node.initializer) {
+                return getTypeOfInitializer(node.initializer);
+            }
+            if (node.parent.parent.kind === 221 /* ForInStatement */) {
+                return stringType;
+            }
+            if (node.parent.parent.kind === 222 /* ForOfStatement */) {
+                return checkRightHandSideOfForOf(node.parent.parent.expression, node.parent.parent.awaitModifier) || errorType;
+            }
+            return errorType;
+        }
+        function getInitialType(node) {
+            return node.kind === 232 /* VariableDeclaration */ ?
+                getInitialTypeOfVariableDeclaration(node) :
+                getInitialTypeOfBindingElement(node);
+        }
+        function getInitialOrAssignedType(node) {
+            return node.kind === 232 /* VariableDeclaration */ || node.kind === 182 /* BindingElement */ ?
+                getInitialType(node) :
+                getAssignedType(node);
+        }
+        function isEmptyArrayAssignment(node) {
+            return node.kind === 232 /* VariableDeclaration */ && node.initializer &&
+                isEmptyArrayLiteral(node.initializer) ||
+                node.kind !== 182 /* BindingElement */ && node.parent.kind === 200 /* BinaryExpression */ &&
+                    isEmptyArrayLiteral(node.parent.right);
+        }
+        function getReferenceCandidate(node) {
+            switch (node.kind) {
+                case 191 /* ParenthesizedExpression */:
+                    return getReferenceCandidate(node.expression);
+                case 200 /* BinaryExpression */:
+                    switch (node.operatorToken.kind) {
+                        case 58 /* EqualsToken */:
+                            return getReferenceCandidate(node.left);
+                        case 26 /* CommaToken */:
+                            return getReferenceCandidate(node.right);
+                    }
+            }
+            return node;
+        }
+        function getReferenceRoot(node) {
+            var parent = node.parent;
+            return parent.kind === 191 /* ParenthesizedExpression */ ||
+                parent.kind === 200 /* BinaryExpression */ && parent.operatorToken.kind === 58 /* EqualsToken */ && parent.left === node ||
+                parent.kind === 200 /* BinaryExpression */ && parent.operatorToken.kind === 26 /* CommaToken */ && parent.right === node ?
+                getReferenceRoot(parent) : node;
+        }
+        function getTypeOfSwitchClause(clause) {
+            if (clause.kind === 266 /* CaseClause */) {
+                return getRegularTypeOfLiteralType(getTypeOfExpression(clause.expression));
+            }
+            return neverType;
+        }
+        function getSwitchClauseTypes(switchStatement) {
+            var links = getNodeLinks(switchStatement);
+            if (!links.switchTypes) {
+                links.switchTypes = [];
+                for (var _i = 0, _a = switchStatement.caseBlock.clauses; _i < _a.length; _i++) {
+                    var clause = _a[_i];
+                    links.switchTypes.push(getTypeOfSwitchClause(clause));
+                }
+            }
+            return links.switchTypes;
+        }
+        function eachTypeContainedIn(source, types) {
+            return source.flags & 262144 /* Union */ ? !ts.forEach(source.types, function (t) { return !ts.contains(types, t); }) : ts.contains(types, source);
+        }
+        function isTypeSubsetOf(source, target) {
+            return source === target || target.flags & 262144 /* Union */ && isTypeSubsetOfUnion(source, target);
+        }
+        function isTypeSubsetOfUnion(source, target) {
+            if (source.flags & 262144 /* Union */) {
+                for (var _i = 0, _a = source.types; _i < _a.length; _i++) {
+                    var t = _a[_i];
+                    if (!containsType(target.types, t)) {
+                        return false;
+                    }
+                }
+                return true;
+            }
+            if (source.flags & 512 /* EnumLiteral */ && getBaseTypeOfEnumLiteralType(source) === target) {
+                return true;
+            }
+            return containsType(target.types, source);
+        }
+        function forEachType(type, f) {
+            return type.flags & 262144 /* Union */ ? ts.forEach(type.types, f) : f(type);
+        }
+        function filterType(type, f) {
+            if (type.flags & 262144 /* Union */) {
+                var types = type.types;
+                var filtered = ts.filter(types, f);
+                return filtered === types ? type : getUnionTypeFromSortedList(filtered, type.flags & 67108864 /* UnionOfUnitTypes */);
+            }
+            return f(type) ? type : neverType;
+        }
+        function mapType(type, mapper, noReductions) {
+            if (type.flags & 32768 /* Never */) {
+                return type;
+            }
+            if (!(type.flags & 262144 /* Union */)) {
+                return mapper(type);
+            }
+            var types = type.types;
+            var mappedType;
+            var mappedTypes;
+            for (var _i = 0, types_13 = types; _i < types_13.length; _i++) {
+                var current = types_13[_i];
+                var t = mapper(current);
+                if (t) {
+                    if (!mappedType) {
+                        mappedType = t;
+                    }
+                    else if (!mappedTypes) {
+                        mappedTypes = [mappedType, t];
+                    }
+                    else {
+                        mappedTypes.push(t);
+                    }
+                }
+            }
+            return mappedTypes ? getUnionType(mappedTypes, noReductions ? 0 /* None */ : 1 /* Literal */) : mappedType;
+        }
+        function extractTypesOfKind(type, kind) {
+            return filterType(type, function (t) { return (t.flags & kind) !== 0; });
+        }
+        // Return a new type in which occurrences of the string and number primitive types in
+        // typeWithPrimitives have been replaced with occurrences of string literals and numeric
+        // literals in typeWithLiterals, respectively.
+        function replacePrimitivesWithLiterals(typeWithPrimitives, typeWithLiterals) {
+            if (isTypeSubsetOf(stringType, typeWithPrimitives) && maybeTypeOfKind(typeWithLiterals, 64 /* StringLiteral */) ||
+                isTypeSubsetOf(numberType, typeWithPrimitives) && maybeTypeOfKind(typeWithLiterals, 128 /* NumberLiteral */)) {
+                return mapType(typeWithPrimitives, function (t) {
+                    return t.flags & 4 /* String */ ? extractTypesOfKind(typeWithLiterals, 4 /* String */ | 64 /* StringLiteral */) :
+                        t.flags & 8 /* Number */ ? extractTypesOfKind(typeWithLiterals, 8 /* Number */ | 128 /* NumberLiteral */) :
+                            t;
+                });
+            }
+            return typeWithPrimitives;
+        }
+        function isIncomplete(flowType) {
+            return flowType.flags === 0;
+        }
+        function getTypeFromFlowType(flowType) {
+            return flowType.flags === 0 ? flowType.type : flowType;
+        }
+        function createFlowType(type, incomplete) {
+            return incomplete ? { flags: 0, type: type } : type;
+        }
+        // An evolving array type tracks the element types that have so far been seen in an
+        // 'x.push(value)' or 'x[n] = value' operation along the control flow graph. Evolving
+        // array types are ultimately converted into manifest array types (using getFinalArrayType)
+        // and never escape the getFlowTypeOfReference function.
+        function createEvolvingArrayType(elementType) {
+            var result = createObjectType(256 /* EvolvingArray */);
+            result.elementType = elementType;
+            return result;
+        }
+        function getEvolvingArrayType(elementType) {
+            return evolvingArrayTypes[elementType.id] || (evolvingArrayTypes[elementType.id] = createEvolvingArrayType(elementType));
+        }
+        // When adding evolving array element types we do not perform subtype reduction. Instead,
+        // we defer subtype reduction until the evolving array type is finalized into a manifest
+        // array type.
+        function addEvolvingArrayElementType(evolvingArrayType, node) {
+            var elementType = getBaseTypeOfLiteralType(getContextFreeTypeOfExpression(node));
+            return isTypeSubsetOf(elementType, evolvingArrayType.elementType) ? evolvingArrayType : getEvolvingArrayType(getUnionType([evolvingArrayType.elementType, elementType]));
+        }
+        function createFinalArrayType(elementType) {
+            return elementType.flags & 32768 /* Never */ ?
+                autoArrayType :
+                createArrayType(elementType.flags & 262144 /* Union */ ?
+                    getUnionType(elementType.types, 2 /* Subtype */) :
+                    elementType);
+        }
+        // We perform subtype reduction upon obtaining the final array type from an evolving array type.
+        function getFinalArrayType(evolvingArrayType) {
+            return evolvingArrayType.finalArrayType || (evolvingArrayType.finalArrayType = createFinalArrayType(evolvingArrayType.elementType));
+        }
+        function finalizeEvolvingArrayType(type) {
+            return ts.getObjectFlags(type) & 256 /* EvolvingArray */ ? getFinalArrayType(type) : type;
+        }
+        function getElementTypeOfEvolvingArrayType(type) {
+            return ts.getObjectFlags(type) & 256 /* EvolvingArray */ ? type.elementType : neverType;
+        }
+        function isEvolvingArrayTypeList(types) {
+            var hasEvolvingArrayType = false;
+            for (var _i = 0, types_14 = types; _i < types_14.length; _i++) {
+                var t = types_14[_i];
+                if (!(t.flags & 32768 /* Never */)) {
+                    if (!(ts.getObjectFlags(t) & 256 /* EvolvingArray */)) {
+                        return false;
+                    }
+                    hasEvolvingArrayType = true;
+                }
+            }
+            return hasEvolvingArrayType;
+        }
+        // At flow control branch or loop junctions, if the type along every antecedent code path
+        // is an evolving array type, we construct a combined evolving array type. Otherwise we
+        // finalize all evolving array types.
+        function getUnionOrEvolvingArrayType(types, subtypeReduction) {
+            return isEvolvingArrayTypeList(types) ?
+                getEvolvingArrayType(getUnionType(ts.map(types, getElementTypeOfEvolvingArrayType))) :
+                getUnionType(ts.sameMap(types, finalizeEvolvingArrayType), subtypeReduction);
+        }
+        // Return true if the given node is 'x' in an 'x.length', x.push(value)', 'x.unshift(value)' or
+        // 'x[n] = value' operation, where 'n' is an expression of type any, undefined, or a number-like type.
+        function isEvolvingArrayOperationTarget(node) {
+            var root = getReferenceRoot(node);
+            var parent = root.parent;
+            var isLengthPushOrUnshift = parent.kind === 185 /* PropertyAccessExpression */ && (parent.name.escapedText === "length" ||
+                parent.parent.kind === 187 /* CallExpression */ && ts.isPushOrUnshiftIdentifier(parent.name));
+            var isElementAssignment = parent.kind === 186 /* ElementAccessExpression */ &&
+                parent.expression === root &&
+                parent.parent.kind === 200 /* BinaryExpression */ &&
+                parent.parent.operatorToken.kind === 58 /* EqualsToken */ &&
+                parent.parent.left === parent &&
+                !ts.isAssignmentTarget(parent.parent) &&
+                isTypeAssignableToKind(getTypeOfExpression(parent.argumentExpression), 168 /* NumberLike */);
+            return isLengthPushOrUnshift || isElementAssignment;
+        }
+        function maybeTypePredicateCall(node) {
+            var links = getNodeLinks(node);
+            if (links.maybeTypePredicate === undefined) {
+                links.maybeTypePredicate = getMaybeTypePredicate(node);
+            }
+            return links.maybeTypePredicate;
+        }
+        function getMaybeTypePredicate(node) {
+            if (node.expression.kind !== 97 /* SuperKeyword */) {
+                var funcType = checkNonNullExpression(node.expression);
+                if (funcType !== silentNeverType) {
+                    var apparentType = getApparentType(funcType);
+                    return apparentType !== errorType && ts.some(getSignaturesOfType(apparentType, 0 /* Call */), signatureHasTypePredicate);
+                }
+            }
+            return false;
+        }
+        function reportFlowControlError(node) {
+            var block = ts.findAncestor(node, ts.isFunctionOrModuleBlock);
+            var sourceFile = ts.getSourceFileOfNode(node);
+            var span = ts.getSpanOfTokenAtPosition(sourceFile, block.statements.pos);
+            diagnostics.add(ts.createFileDiagnostic(sourceFile, span.start, span.length, ts.Diagnostics.The_containing_function_or_module_body_is_too_large_for_control_flow_analysis));
+        }
+        function getFlowTypeOfReference(reference, declaredType, initialType, flowContainer, couldBeUninitialized) {
+            if (initialType === void 0) { initialType = declaredType; }
+            var key;
+            var flowDepth = 0;
+            if (flowAnalysisDisabled) {
+                return errorType;
+            }
+            if (!reference.flowNode || !couldBeUninitialized && !(declaredType.flags & 33492479 /* Narrowable */)) {
+                return declaredType;
+            }
+            var sharedFlowStart = sharedFlowCount;
+            var evolvedType = getTypeFromFlowType(getTypeAtFlowNode(reference.flowNode));
+            sharedFlowCount = sharedFlowStart;
+            // When the reference is 'x' in an 'x.length', 'x.push(value)', 'x.unshift(value)' or x[n] = value' operation,
+            // we give type 'any[]' to 'x' instead of using the type determined by control flow analysis such that operations
+            // on empty arrays are possible without implicit any errors and new element types can be inferred without
+            // type mismatch errors.
+            var resultType = ts.getObjectFlags(evolvedType) & 256 /* EvolvingArray */ && isEvolvingArrayOperationTarget(reference) ? anyArrayType : finalizeEvolvingArrayType(evolvedType);
+            if (reference.parent && reference.parent.kind === 209 /* NonNullExpression */ && getTypeWithFacts(resultType, 524288 /* NEUndefinedOrNull */).flags & 32768 /* Never */) {
+                return declaredType;
+            }
+            return resultType;
+            function getTypeAtFlowNode(flow) {
+                if (flowDepth === 2500) {
+                    // We have made 2500 recursive invocations. To avoid overflowing the call stack we report an error
+                    // and disable further control flow analysis in the containing function or module body.
+                    flowAnalysisDisabled = true;
+                    reportFlowControlError(reference);
+                    return errorType;
+                }
+                flowDepth++;
+                while (true) {
+                    var flags = flow.flags;
+                    if (flags & 1024 /* Shared */) {
+                        // We cache results of flow type resolution for shared nodes that were previously visited in
+                        // the same getFlowTypeOfReference invocation. A node is considered shared when it is the
+                        // antecedent of more than one node.
+                        for (var i = sharedFlowStart; i < sharedFlowCount; i++) {
+                            if (sharedFlowNodes[i] === flow) {
+                                flowDepth--;
+                                return sharedFlowTypes[i];
+                            }
+                        }
+                    }
+                    var type = void 0;
+                    if (flags & 4096 /* AfterFinally */) {
+                        // block flow edge: finally -> pre-try (for larger explanation check comment in binder.ts - bindTryStatement
+                        flow.locked = true;
+                        type = getTypeAtFlowNode(flow.antecedent);
+                        flow.locked = false;
+                    }
+                    else if (flags & 2048 /* PreFinally */) {
+                        // locked pre-finally flows are filtered out in getTypeAtFlowBranchLabel
+                        // so here just redirect to antecedent
+                        flow = flow.antecedent;
+                        continue;
+                    }
+                    else if (flags & 16 /* Assignment */) {
+                        type = getTypeAtFlowAssignment(flow);
+                        if (!type) {
+                            flow = flow.antecedent;
+                            continue;
+                        }
+                    }
+                    else if (flags & 96 /* Condition */) {
+                        type = getTypeAtFlowCondition(flow);
+                    }
+                    else if (flags & 128 /* SwitchClause */) {
+                        type = getTypeAtSwitchClause(flow);
+                    }
+                    else if (flags & 12 /* Label */) {
+                        if (flow.antecedents.length === 1) {
+                            flow = flow.antecedents[0];
+                            continue;
+                        }
+                        type = flags & 4 /* BranchLabel */ ?
+                            getTypeAtFlowBranchLabel(flow) :
+                            getTypeAtFlowLoopLabel(flow);
+                    }
+                    else if (flags & 256 /* ArrayMutation */) {
+                        type = getTypeAtFlowArrayMutation(flow);
+                        if (!type) {
+                            flow = flow.antecedent;
+                            continue;
+                        }
+                    }
+                    else if (flags & 2 /* Start */) {
+                        // Check if we should continue with the control flow of the containing function.
+                        var container = flow.container;
+                        if (container && container !== flowContainer && reference.kind !== 185 /* PropertyAccessExpression */ && reference.kind !== 99 /* ThisKeyword */) {
+                            flow = container.flowNode;
+                            continue;
+                        }
+                        // At the top of the flow we have the initial type.
+                        type = initialType;
+                    }
+                    else {
+                        // Unreachable code errors are reported in the binding phase. Here we
+                        // simply return the non-auto declared type to reduce follow-on errors.
+                        type = convertAutoToAny(declaredType);
+                    }
+                    if (flags & 1024 /* Shared */) {
+                        // Record visited node and the associated type in the cache.
+                        sharedFlowNodes[sharedFlowCount] = flow;
+                        sharedFlowTypes[sharedFlowCount] = type;
+                        sharedFlowCount++;
+                    }
+                    flowDepth--;
+                    return type;
+                }
+            }
+            function getTypeAtFlowAssignment(flow) {
+                var node = flow.node;
+                // Assignments only narrow the computed type if the declared type is a union type. Thus, we
+                // only need to evaluate the assigned type if the declared type is a union type.
+                if (isMatchingReference(reference, node)) {
+                    if (ts.getAssignmentTargetKind(node) === 2 /* Compound */) {
+                        var flowType = getTypeAtFlowNode(flow.antecedent);
+                        return createFlowType(getBaseTypeOfLiteralType(getTypeFromFlowType(flowType)), isIncomplete(flowType));
+                    }
+                    if (declaredType === autoType || declaredType === autoArrayType) {
+                        if (isEmptyArrayAssignment(node)) {
+                            return getEvolvingArrayType(neverType);
+                        }
+                        var assignedType = getBaseTypeOfLiteralType(getInitialOrAssignedType(node));
+                        return isTypeAssignableTo(assignedType, declaredType) ? assignedType : anyArrayType;
+                    }
+                    if (declaredType.flags & 262144 /* Union */) {
+                        return getAssignmentReducedType(declaredType, getInitialOrAssignedType(node));
+                    }
+                    return declaredType;
+                }
+                // We didn't have a direct match. However, if the reference is a dotted name, this
+                // may be an assignment to a left hand part of the reference. For example, for a
+                // reference 'x.y.z', we may be at an assignment to 'x.y' or 'x'. In that case,
+                // return the declared type.
+                if (containsMatchingReference(reference, node)) {
+                    return declaredType;
+                }
+                // Assignment doesn't affect reference
+                return undefined;
+            }
+            function getTypeAtFlowArrayMutation(flow) {
+                if (declaredType === autoType || declaredType === autoArrayType) {
+                    var node = flow.node;
+                    var expr = node.kind === 187 /* CallExpression */ ?
+                        node.expression.expression :
+                        node.left.expression;
+                    if (isMatchingReference(reference, getReferenceCandidate(expr))) {
+                        var flowType = getTypeAtFlowNode(flow.antecedent);
+                        var type = getTypeFromFlowType(flowType);
+                        if (ts.getObjectFlags(type) & 256 /* EvolvingArray */) {
+                            var evolvedType_1 = type;
+                            if (node.kind === 187 /* CallExpression */) {
+                                for (var _i = 0, _a = node.arguments; _i < _a.length; _i++) {
+                                    var arg = _a[_i];
+                                    evolvedType_1 = addEvolvingArrayElementType(evolvedType_1, arg);
+                                }
+                            }
+                            else {
+                                var indexType = getTypeOfExpression(node.left.argumentExpression);
+                                if (isTypeAssignableToKind(indexType, 168 /* NumberLike */)) {
+                                    evolvedType_1 = addEvolvingArrayElementType(evolvedType_1, node.right);
+                                }
+                            }
+                            return evolvedType_1 === type ? flowType : createFlowType(evolvedType_1, isIncomplete(flowType));
+                        }
+                        return flowType;
+                    }
+                }
+                return undefined;
+            }
+            function getTypeAtFlowCondition(flow) {
+                var flowType = getTypeAtFlowNode(flow.antecedent);
+                var type = getTypeFromFlowType(flowType);
+                if (type.flags & 32768 /* Never */) {
+                    return flowType;
+                }
+                // If we have an antecedent type (meaning we're reachable in some way), we first
+                // attempt to narrow the antecedent type. If that produces the never type, and if
+                // the antecedent type is incomplete (i.e. a transient type in a loop), then we
+                // take the type guard as an indication that control *could* reach here once we
+                // have the complete type. We proceed by switching to the silent never type which
+                // doesn't report errors when operators are applied to it. Note that this is the
+                // *only* place a silent never type is ever generated.
+                var assumeTrue = (flow.flags & 32 /* TrueCondition */) !== 0;
+                var nonEvolvingType = finalizeEvolvingArrayType(type);
+                var narrowedType = narrowType(nonEvolvingType, flow.expression, assumeTrue);
+                if (narrowedType === nonEvolvingType) {
+                    return flowType;
+                }
+                var incomplete = isIncomplete(flowType);
+                var resultType = incomplete && narrowedType.flags & 32768 /* Never */ ? silentNeverType : narrowedType;
+                return createFlowType(resultType, incomplete);
+            }
+            function getTypeAtSwitchClause(flow) {
+                var flowType = getTypeAtFlowNode(flow.antecedent);
+                var type = getTypeFromFlowType(flowType);
+                var expr = flow.switchStatement.expression;
+                if (isMatchingReference(reference, expr)) {
+                    type = narrowTypeBySwitchOnDiscriminant(type, flow.switchStatement, flow.clauseStart, flow.clauseEnd);
+                }
+                else if (isMatchingReferenceDiscriminant(expr, type)) {
+                    type = narrowTypeByDiscriminant(type, expr, function (t) { return narrowTypeBySwitchOnDiscriminant(t, flow.switchStatement, flow.clauseStart, flow.clauseEnd); });
+                }
+                return createFlowType(type, isIncomplete(flowType));
+            }
+            function getTypeAtFlowBranchLabel(flow) {
+                var antecedentTypes = [];
+                var subtypeReduction = false;
+                var seenIncomplete = false;
+                for (var _i = 0, _a = flow.antecedents; _i < _a.length; _i++) {
+                    var antecedent = _a[_i];
+                    if (antecedent.flags & 2048 /* PreFinally */ && antecedent.lock.locked) {
+                        // if flow correspond to branch from pre-try to finally and this branch is locked - this means that
+                        // we initially have started following the flow outside the finally block.
+                        // in this case we should ignore this branch.
+                        continue;
+                    }
+                    var flowType = getTypeAtFlowNode(antecedent);
+                    var type = getTypeFromFlowType(flowType);
+                    // If the type at a particular antecedent path is the declared type and the
+                    // reference is known to always be assigned (i.e. when declared and initial types
+                    // are the same), there is no reason to process more antecedents since the only
+                    // possible outcome is subtypes that will be removed in the final union type anyway.
+                    if (type === declaredType && declaredType === initialType) {
+                        return type;
+                    }
+                    ts.pushIfUnique(antecedentTypes, type);
+                    // If an antecedent type is not a subset of the declared type, we need to perform
+                    // subtype reduction. This happens when a "foreign" type is injected into the control
+                    // flow using the instanceof operator or a user defined type predicate.
+                    if (!isTypeSubsetOf(type, declaredType)) {
+                        subtypeReduction = true;
+                    }
+                    if (isIncomplete(flowType)) {
+                        seenIncomplete = true;
+                    }
+                }
+                return createFlowType(getUnionOrEvolvingArrayType(antecedentTypes, subtypeReduction ? 2 /* Subtype */ : 1 /* Literal */), seenIncomplete);
+            }
+            function getTypeAtFlowLoopLabel(flow) {
+                // If we have previously computed the control flow type for the reference at
+                // this flow loop junction, return the cached type.
+                var id = getFlowNodeId(flow);
+                var cache = flowLoopCaches[id] || (flowLoopCaches[id] = ts.createMap());
+                if (!key) {
+                    key = getFlowCacheKey(reference);
+                    // No cache key is generated when binding patterns are in unnarrowable situations
+                    if (!key) {
+                        return declaredType;
+                    }
+                }
+                var cached = cache.get(key);
+                if (cached) {
+                    return cached;
+                }
+                // If this flow loop junction and reference are already being processed, return
+                // the union of the types computed for each branch so far, marked as incomplete.
+                // It is possible to see an empty array in cases where loops are nested and the
+                // back edge of the outer loop reaches an inner loop that is already being analyzed.
+                // In such cases we restart the analysis of the inner loop, which will then see
+                // a non-empty in-process array for the outer loop and eventually terminate because
+                // the first antecedent of a loop junction is always the non-looping control flow
+                // path that leads to the top.
+                for (var i = flowLoopStart; i < flowLoopCount; i++) {
+                    if (flowLoopNodes[i] === flow && flowLoopKeys[i] === key && flowLoopTypes[i].length) {
+                        return createFlowType(getUnionOrEvolvingArrayType(flowLoopTypes[i], 1 /* Literal */), /*incomplete*/ true);
+                    }
+                }
+                // Add the flow loop junction and reference to the in-process stack and analyze
+                // each antecedent code path.
+                var antecedentTypes = [];
+                var subtypeReduction = false;
+                var firstAntecedentType;
+                flowLoopNodes[flowLoopCount] = flow;
+                flowLoopKeys[flowLoopCount] = key;
+                flowLoopTypes[flowLoopCount] = antecedentTypes;
+                for (var _i = 0, _a = flow.antecedents; _i < _a.length; _i++) {
+                    var antecedent = _a[_i];
+                    flowLoopCount++;
+                    var flowType = getTypeAtFlowNode(antecedent);
+                    flowLoopCount--;
+                    if (!firstAntecedentType) {
+                        firstAntecedentType = flowType;
+                    }
+                    var type = getTypeFromFlowType(flowType);
+                    // If we see a value appear in the cache it is a sign that control flow analysis
+                    // was restarted and completed by checkExpressionCached. We can simply pick up
+                    // the resulting type and bail out.
+                    var cached_1 = cache.get(key);
+                    if (cached_1) {
+                        return cached_1;
+                    }
+                    ts.pushIfUnique(antecedentTypes, type);
+                    // If an antecedent type is not a subset of the declared type, we need to perform
+                    // subtype reduction. This happens when a "foreign" type is injected into the control
+                    // flow using the instanceof operator or a user defined type predicate.
+                    if (!isTypeSubsetOf(type, declaredType)) {
+                        subtypeReduction = true;
+                    }
+                    // If the type at a particular antecedent path is the declared type there is no
+                    // reason to process more antecedents since the only possible outcome is subtypes
+                    // that will be removed in the final union type anyway.
+                    if (type === declaredType) {
+                        break;
+                    }
+                }
+                // The result is incomplete if the first antecedent (the non-looping control flow path)
+                // is incomplete.
+                var result = getUnionOrEvolvingArrayType(antecedentTypes, subtypeReduction ? 2 /* Subtype */ : 1 /* Literal */);
+                if (isIncomplete(firstAntecedentType)) {
+                    return createFlowType(result, /*incomplete*/ true);
+                }
+                cache.set(key, result);
+                return result;
+            }
+            function isMatchingReferenceDiscriminant(expr, computedType) {
+                return expr.kind === 185 /* PropertyAccessExpression */ &&
+                    computedType.flags & 262144 /* Union */ &&
+                    isMatchingReference(reference, expr.expression) &&
+                    isDiscriminantProperty(computedType, expr.name.escapedText);
+            }
+            function narrowTypeByDiscriminant(type, propAccess, narrowType) {
+                var propName = propAccess.name.escapedText;
+                var propType = getTypeOfPropertyOfType(type, propName);
+                var narrowedPropType = propType && narrowType(propType);
+                return propType === narrowedPropType ? type : filterType(type, function (t) { return isTypeComparableTo(getTypeOfPropertyOfType(t, propName), narrowedPropType); });
+            }
+            function narrowTypeByTruthiness(type, expr, assumeTrue) {
+                if (isMatchingReference(reference, expr)) {
+                    return getTypeWithFacts(type, assumeTrue ? 1048576 /* Truthy */ : 2097152 /* Falsy */);
+                }
+                if (isMatchingReferenceDiscriminant(expr, declaredType)) {
+                    return narrowTypeByDiscriminant(type, expr, function (t) { return getTypeWithFacts(t, assumeTrue ? 1048576 /* Truthy */ : 2097152 /* Falsy */); });
+                }
+                if (containsMatchingReferenceDiscriminant(reference, expr)) {
+                    return declaredType;
+                }
+                return type;
+            }
+            function isTypePresencePossible(type, propName, assumeTrue) {
+                if (getIndexInfoOfType(type, 0 /* String */)) {
+                    return true;
+                }
+                var prop = getPropertyOfType(type, propName);
+                if (prop) {
+                    return prop.flags & 16777216 /* Optional */ ? true : assumeTrue;
+                }
+                return !assumeTrue;
+            }
+            function narrowByInKeyword(type, literal, assumeTrue) {
+                if ((type.flags & (262144 /* Union */ | 131072 /* Object */)) || (type.flags & 65536 /* TypeParameter */ && type.isThisType)) {
+                    var propName_1 = ts.escapeLeadingUnderscores(literal.text);
+                    return filterType(type, function (t) { return isTypePresencePossible(t, propName_1, assumeTrue); });
+                }
+                return type;
+            }
+            function narrowTypeByBinaryExpression(type, expr, assumeTrue) {
+                switch (expr.operatorToken.kind) {
+                    case 58 /* EqualsToken */:
+                        return narrowTypeByTruthiness(type, expr.left, assumeTrue);
+                    case 32 /* EqualsEqualsToken */:
+                    case 33 /* ExclamationEqualsToken */:
+                    case 34 /* EqualsEqualsEqualsToken */:
+                    case 35 /* ExclamationEqualsEqualsToken */:
+                        var operator_1 = expr.operatorToken.kind;
+                        var left_1 = getReferenceCandidate(expr.left);
+                        var right_1 = getReferenceCandidate(expr.right);
+                        if (left_1.kind === 195 /* TypeOfExpression */ && ts.isStringLiteralLike(right_1)) {
+                            return narrowTypeByTypeof(type, left_1, operator_1, right_1, assumeTrue);
+                        }
+                        if (right_1.kind === 195 /* TypeOfExpression */ && ts.isStringLiteralLike(left_1)) {
+                            return narrowTypeByTypeof(type, right_1, operator_1, left_1, assumeTrue);
+                        }
+                        if (isMatchingReference(reference, left_1)) {
+                            return narrowTypeByEquality(type, operator_1, right_1, assumeTrue);
+                        }
+                        if (isMatchingReference(reference, right_1)) {
+                            return narrowTypeByEquality(type, operator_1, left_1, assumeTrue);
+                        }
+                        if (isMatchingReferenceDiscriminant(left_1, declaredType)) {
+                            return narrowTypeByDiscriminant(type, left_1, function (t) { return narrowTypeByEquality(t, operator_1, right_1, assumeTrue); });
+                        }
+                        if (isMatchingReferenceDiscriminant(right_1, declaredType)) {
+                            return narrowTypeByDiscriminant(type, right_1, function (t) { return narrowTypeByEquality(t, operator_1, left_1, assumeTrue); });
+                        }
+                        if (containsMatchingReferenceDiscriminant(reference, left_1) || containsMatchingReferenceDiscriminant(reference, right_1)) {
+                            return declaredType;
+                        }
+                        break;
+                    case 93 /* InstanceOfKeyword */:
+                        return narrowTypeByInstanceof(type, expr, assumeTrue);
+                    case 92 /* InKeyword */:
+                        var target = getReferenceCandidate(expr.right);
+                        if (ts.isStringLiteralLike(expr.left) && isMatchingReference(reference, target)) {
+                            return narrowByInKeyword(type, expr.left, assumeTrue);
+                        }
+                        break;
+                    case 26 /* CommaToken */:
+                        return narrowType(type, expr.right, assumeTrue);
+                }
+                return type;
+            }
+            function narrowTypeByEquality(type, operator, value, assumeTrue) {
+                if (type.flags & 1 /* Any */) {
+                    return type;
+                }
+                if (operator === 33 /* ExclamationEqualsToken */ || operator === 35 /* ExclamationEqualsEqualsToken */) {
+                    assumeTrue = !assumeTrue;
+                }
+                var valueType = getTypeOfExpression(value);
+                if (valueType.flags & 24576 /* Nullable */) {
+                    if (!strictNullChecks) {
+                        return type;
+                    }
+                    var doubleEquals = operator === 32 /* EqualsEqualsToken */ || operator === 33 /* ExclamationEqualsToken */;
+                    var facts = doubleEquals ?
+                        assumeTrue ? 65536 /* EQUndefinedOrNull */ : 524288 /* NEUndefinedOrNull */ :
+                        valueType.flags & 16384 /* Null */ ?
+                            assumeTrue ? 32768 /* EQNull */ : 262144 /* NENull */ :
+                            assumeTrue ? 16384 /* EQUndefined */ : 131072 /* NEUndefined */;
+                    return getTypeWithFacts(type, facts);
+                }
+                if (type.flags & 16909315 /* NotUnionOrUnit */) {
+                    return type;
+                }
+                if (assumeTrue) {
+                    var narrowedType = filterType(type, function (t) { return areTypesComparable(t, valueType); });
+                    return narrowedType.flags & 32768 /* Never */ ? type : replacePrimitivesWithLiterals(narrowedType, valueType);
+                }
+                if (isUnitType(valueType)) {
+                    var regularType_1 = getRegularTypeOfLiteralType(valueType);
+                    return filterType(type, function (t) { return getRegularTypeOfLiteralType(t) !== regularType_1; });
+                }
+                return type;
+            }
+            function narrowTypeByTypeof(type, typeOfExpr, operator, literal, assumeTrue) {
+                // We have '==', '!=', '====', or !==' operator with 'typeof xxx' and string literal operands
+                var target = getReferenceCandidate(typeOfExpr.expression);
+                if (!isMatchingReference(reference, target)) {
+                    // For a reference of the form 'x.y', a 'typeof x === ...' type guard resets the
+                    // narrowed type of 'y' to its declared type.
+                    if (containsMatchingReference(reference, target)) {
+                        return declaredType;
+                    }
+                    return type;
+                }
+                if (operator === 33 /* ExclamationEqualsToken */ || operator === 35 /* ExclamationEqualsEqualsToken */) {
+                    assumeTrue = !assumeTrue;
+                }
+                if (type.flags & 1 /* Any */ && literal.text === "function") {
+                    return type;
+                }
+                if (assumeTrue && !(type.flags & 262144 /* Union */)) {
+                    // We narrow a non-union type to an exact primitive type if the non-union type
+                    // is a supertype of that primitive type. For example, type 'any' can be narrowed
+                    // to one of the primitive types.
+                    var targetType = literal.text === "function" ? globalFunctionType : typeofTypesByName.get(literal.text);
+                    if (targetType) {
+                        if (isTypeSubtypeOf(targetType, type)) {
+                            return targetType;
+                        }
+                        if (type.flags & 15794176 /* Instantiable */) {
+                            var constraint = getBaseConstraintOfType(type) || anyType;
+                            if (isTypeSubtypeOf(targetType, constraint)) {
+                                return getIntersectionType([type, targetType]);
+                            }
+                        }
+                    }
+                }
+                var facts = assumeTrue ?
+                    typeofEQFacts.get(literal.text) || 64 /* TypeofEQHostObject */ :
+                    typeofNEFacts.get(literal.text) || 8192 /* TypeofNEHostObject */;
+                return getTypeWithFacts(type, facts);
+            }
+            function narrowTypeBySwitchOnDiscriminant(type, switchStatement, clauseStart, clauseEnd) {
+                // We only narrow if all case expressions specify values with unit types
+                var switchTypes = getSwitchClauseTypes(switchStatement);
+                if (!switchTypes.length) {
+                    return type;
+                }
+                var clauseTypes = switchTypes.slice(clauseStart, clauseEnd);
+                var hasDefaultClause = clauseStart === clauseEnd || ts.contains(clauseTypes, neverType);
+                var discriminantType = getUnionType(clauseTypes);
+                var caseType = discriminantType.flags & 32768 /* Never */ ? neverType :
+                    replacePrimitivesWithLiterals(filterType(type, function (t) { return areTypesComparable(discriminantType, t); }), discriminantType);
+                if (!hasDefaultClause) {
+                    return caseType;
+                }
+                var defaultType = filterType(type, function (t) { return !(isUnitType(t) && ts.contains(switchTypes, getRegularTypeOfLiteralType(t))); });
+                return caseType.flags & 32768 /* Never */ ? defaultType : getUnionType([caseType, defaultType]);
+            }
+            function narrowTypeByInstanceof(type, expr, assumeTrue) {
+                var left = getReferenceCandidate(expr.left);
+                if (!isMatchingReference(reference, left)) {
+                    // For a reference of the form 'x.y', an 'x instanceof T' type guard resets the
+                    // narrowed type of 'y' to its declared type.
+                    if (containsMatchingReference(reference, left)) {
+                        return declaredType;
+                    }
+                    return type;
+                }
+                // Check that right operand is a function type with a prototype property
+                var rightType = getTypeOfExpression(expr.right);
+                if (!isTypeSubtypeOf(rightType, globalFunctionType)) {
+                    return type;
+                }
+                var targetType;
+                var prototypeProperty = getPropertyOfType(rightType, "prototype");
+                if (prototypeProperty) {
+                    // Target type is type of the prototype property
+                    var prototypePropertyType = getTypeOfSymbol(prototypeProperty);
+                    if (!isTypeAny(prototypePropertyType)) {
+                        targetType = prototypePropertyType;
+                    }
+                }
+                // Don't narrow from 'any' if the target type is exactly 'Object' or 'Function'
+                if (isTypeAny(type) && (targetType === globalObjectType || targetType === globalFunctionType)) {
+                    return type;
+                }
+                if (!targetType) {
+                    // Target type is type of construct signature
+                    var constructSignatures = void 0;
+                    if (ts.getObjectFlags(rightType) & 2 /* Interface */) {
+                        constructSignatures = resolveDeclaredMembers(rightType).declaredConstructSignatures;
+                    }
+                    else if (ts.getObjectFlags(rightType) & 16 /* Anonymous */) {
+                        constructSignatures = getSignaturesOfType(rightType, 1 /* Construct */);
+                    }
+                    if (constructSignatures && constructSignatures.length) {
+                        targetType = getUnionType(ts.map(constructSignatures, function (signature) { return getReturnTypeOfSignature(getErasedSignature(signature)); }));
+                    }
+                }
+                if (targetType) {
+                    return getNarrowedType(type, targetType, assumeTrue, isTypeDerivedFrom);
+                }
+                return type;
+            }
+            function getNarrowedType(type, candidate, assumeTrue, isRelated) {
+                if (!assumeTrue) {
+                    return filterType(type, function (t) { return !isRelated(t, candidate); });
+                }
+                // If the current type is a union type, remove all constituents that couldn't be instances of
+                // the candidate type. If one or more constituents remain, return a union of those.
+                if (type.flags & 262144 /* Union */) {
+                    var assignableType = filterType(type, function (t) { return isRelated(t, candidate); });
+                    if (!(assignableType.flags & 32768 /* Never */)) {
+                        return assignableType;
+                    }
+                }
+                // If the candidate type is a subtype of the target type, narrow to the candidate type.
+                // Otherwise, if the target type is assignable to the candidate type, keep the target type.
+                // Otherwise, if the candidate type is assignable to the target type, narrow to the candidate
+                // type. Otherwise, the types are completely unrelated, so narrow to an intersection of the
+                // two types.
+                return isTypeSubtypeOf(candidate, type) ? candidate :
+                    isTypeAssignableTo(type, candidate) ? type :
+                        isTypeAssignableTo(candidate, type) ? candidate :
+                            getIntersectionType([type, candidate]);
+            }
+            function narrowTypeByTypePredicate(type, callExpression, assumeTrue) {
+                if (!hasMatchingArgument(callExpression, reference) || !maybeTypePredicateCall(callExpression)) {
+                    return type;
+                }
+                var signature = getResolvedSignature(callExpression);
+                var predicate = getTypePredicateOfSignature(signature);
+                if (!predicate) {
+                    return type;
+                }
+                // Don't narrow from 'any' if the predicate type is exactly 'Object' or 'Function'
+                if (isTypeAny(type) && (predicate.type === globalObjectType || predicate.type === globalFunctionType)) {
+                    return type;
+                }
+                if (ts.isIdentifierTypePredicate(predicate)) {
+                    var predicateArgument = callExpression.arguments[predicate.parameterIndex - (signature.thisParameter ? 1 : 0)];
+                    if (predicateArgument) {
+                        if (isMatchingReference(reference, predicateArgument)) {
+                            return getNarrowedType(type, predicate.type, assumeTrue, isTypeSubtypeOf);
+                        }
+                        if (containsMatchingReference(reference, predicateArgument)) {
+                            return declaredType;
+                        }
+                    }
+                }
+                else {
+                    var invokedExpression = ts.skipParentheses(callExpression.expression);
+                    if (invokedExpression.kind === 186 /* ElementAccessExpression */ || invokedExpression.kind === 185 /* PropertyAccessExpression */) {
+                        var accessExpression = invokedExpression;
+                        var possibleReference = ts.skipParentheses(accessExpression.expression);
+                        if (isMatchingReference(reference, possibleReference)) {
+                            return getNarrowedType(type, predicate.type, assumeTrue, isTypeSubtypeOf);
+                        }
+                        if (containsMatchingReference(reference, possibleReference)) {
+                            return declaredType;
+                        }
+                    }
+                }
+                return type;
+            }
+            // Narrow the given type based on the given expression having the assumed boolean value. The returned type
+            // will be a subtype or the same type as the argument.
+            function narrowType(type, expr, assumeTrue) {
+                switch (expr.kind) {
+                    case 71 /* Identifier */:
+                    case 99 /* ThisKeyword */:
+                    case 97 /* SuperKeyword */:
+                    case 185 /* PropertyAccessExpression */:
+                        return narrowTypeByTruthiness(type, expr, assumeTrue);
+                    case 187 /* CallExpression */:
+                        return narrowTypeByTypePredicate(type, expr, assumeTrue);
+                    case 191 /* ParenthesizedExpression */:
+                        return narrowType(type, expr.expression, assumeTrue);
+                    case 200 /* BinaryExpression */:
+                        return narrowTypeByBinaryExpression(type, expr, assumeTrue);
+                    case 198 /* PrefixUnaryExpression */:
+                        if (expr.operator === 51 /* ExclamationToken */) {
+                            return narrowType(type, expr.operand, !assumeTrue);
+                        }
+                        break;
+                }
+                return type;
+            }
+        }
+        function getTypeOfSymbolAtLocation(symbol, location) {
+            symbol = symbol.exportSymbol || symbol;
+            // If we have an identifier or a property access at the given location, if the location is
+            // an dotted name expression, and if the location is not an assignment target, obtain the type
+            // of the expression (which will reflect control flow analysis). If the expression indeed
+            // resolved to the given symbol, return the narrowed type.
+            if (location.kind === 71 /* Identifier */) {
+                if (ts.isRightSideOfQualifiedNameOrPropertyAccess(location)) {
+                    location = location.parent;
+                }
+                if (ts.isExpressionNode(location) && !ts.isAssignmentTarget(location)) {
+                    var type = getTypeOfExpression(location);
+                    if (getExportSymbolOfValueSymbolIfExported(getNodeLinks(location).resolvedSymbol) === symbol) {
+                        return type;
+                    }
+                }
+            }
+            // The location isn't a reference to the given symbol, meaning we're being asked
+            // a hypothetical question of what type the symbol would have if there was a reference
+            // to it at the given location. Since we have no control flow information for the
+            // hypothetical reference (control flow information is created and attached by the
+            // binder), we simply return the declared type of the symbol.
+            return getTypeOfSymbol(symbol);
+        }
+        function getControlFlowContainer(node) {
+            return ts.findAncestor(node.parent, function (node) {
+                return ts.isFunctionLike(node) && !ts.getImmediatelyInvokedFunctionExpression(node) ||
+                    node.kind === 240 /* ModuleBlock */ ||
+                    node.kind === 274 /* SourceFile */ ||
+                    node.kind === 152 /* PropertyDeclaration */;
+            });
+        }
+        // Check if a parameter is assigned anywhere within its declaring function.
+        function isParameterAssigned(symbol) {
+            var func = ts.getRootDeclaration(symbol.valueDeclaration).parent;
+            var links = getNodeLinks(func);
+            if (!(links.flags & 4194304 /* AssignmentsMarked */)) {
+                links.flags |= 4194304 /* AssignmentsMarked */;
+                if (!hasParentWithAssignmentsMarked(func)) {
+                    markParameterAssignments(func);
+                }
+            }
+            return symbol.isAssigned || false;
+        }
+        function hasParentWithAssignmentsMarked(node) {
+            return !!ts.findAncestor(node.parent, function (node) { return ts.isFunctionLike(node) && !!(getNodeLinks(node).flags & 4194304 /* AssignmentsMarked */); });
+        }
+        function markParameterAssignments(node) {
+            if (node.kind === 71 /* Identifier */) {
+                if (ts.isAssignmentTarget(node)) {
+                    var symbol = getResolvedSymbol(node);
+                    if (symbol.valueDeclaration && ts.getRootDeclaration(symbol.valueDeclaration).kind === 149 /* Parameter */) {
+                        symbol.isAssigned = true;
+                    }
+                }
+            }
+            else {
+                ts.forEachChild(node, markParameterAssignments);
+            }
+        }
+        function isConstVariable(symbol) {
+            return symbol.flags & 3 /* Variable */ && (getDeclarationNodeFlagsFromSymbol(symbol) & 2 /* Const */) !== 0 && getTypeOfSymbol(symbol) !== autoArrayType;
+        }
+        /** remove undefined from the annotated type of a parameter when there is an initializer (that doesn't include undefined) */
+        function removeOptionalityFromDeclaredType(declaredType, declaration) {
+            var annotationIncludesUndefined = strictNullChecks &&
+                declaration.kind === 149 /* Parameter */ &&
+                declaration.initializer &&
+                getFalsyFlags(declaredType) & 8192 /* Undefined */ &&
+                !(getFalsyFlags(checkExpression(declaration.initializer)) & 8192 /* Undefined */);
+            return annotationIncludesUndefined ? getTypeWithFacts(declaredType, 131072 /* NEUndefined */) : declaredType;
+        }
+        function isConstraintPosition(node) {
+            var parent = node.parent;
+            return parent.kind === 185 /* PropertyAccessExpression */ ||
+                parent.kind === 187 /* CallExpression */ && parent.expression === node ||
+                parent.kind === 186 /* ElementAccessExpression */ && parent.expression === node ||
+                parent.kind === 182 /* BindingElement */ && parent.name === node && !!parent.initializer;
+        }
+        function typeHasNullableConstraint(type) {
+            return type.flags & 14745600 /* InstantiableNonPrimitive */ && maybeTypeOfKind(getBaseConstraintOfType(type) || emptyObjectType, 24576 /* Nullable */);
+        }
+        function getConstraintForLocation(type, node) {
+            // When a node is the left hand expression of a property access, element access, or call expression,
+            // and the type of the node includes type variables with constraints that are nullable, we fetch the
+            // apparent type of the node *before* performing control flow analysis such that narrowings apply to
+            // the constraint type.
+            if (type && isConstraintPosition(node) && forEachType(type, typeHasNullableConstraint)) {
+                return mapType(getWidenedType(type), getBaseConstraintOrType);
+            }
+            return type;
+        }
+        function markAliasReferenced(symbol, location) {
+            if (isNonLocalAlias(symbol, /*excludes*/ 67216319 /* Value */) && !isInTypeQuery(location) && !isConstEnumOrConstEnumOnlyModule(resolveAlias(symbol))) {
+                markAliasSymbolAsReferenced(symbol);
+            }
+        }
+        function checkIdentifier(node) {
+            var symbol = getResolvedSymbol(node);
+            if (symbol === unknownSymbol) {
+                return errorType;
+            }
+            // As noted in ECMAScript 6 language spec, arrow functions never have an arguments objects.
+            // Although in down-level emit of arrow function, we emit it using function expression which means that
+            // arguments objects will be bound to the inner object; emitting arrow function natively in ES6, arguments objects
+            // will be bound to non-arrow function that contain this arrow function. This results in inconsistent behavior.
+            // To avoid that we will give an error to users if they use arguments objects in arrow function so that they
+            // can explicitly bound arguments objects
+            if (symbol === argumentsSymbol) {
+                var container = ts.getContainingFunction(node);
+                if (languageVersion < 2 /* ES2015 */) {
+                    if (container.kind === 193 /* ArrowFunction */) {
+                        error(node, ts.Diagnostics.The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_standard_function_expression);
+                    }
+                    else if (ts.hasModifier(container, 256 /* Async */)) {
+                        error(node, ts.Diagnostics.The_arguments_object_cannot_be_referenced_in_an_async_function_or_method_in_ES3_and_ES5_Consider_using_a_standard_function_or_method);
+                    }
+                }
+                getNodeLinks(container).flags |= 8192 /* CaptureArguments */;
+                return getTypeOfSymbol(symbol);
+            }
+            // We should only mark aliases as referenced if there isn't a local value declaration
+            // for the symbol. Also, don't mark any property access expression LHS - checkPropertyAccessExpression will handle that
+            if (!(node.parent && ts.isPropertyAccessExpression(node.parent) && node.parent.expression === node)) {
+                markAliasReferenced(symbol, node);
+            }
+            var localOrExportSymbol = getExportSymbolOfValueSymbolIfExported(symbol);
+            var declaration = localOrExportSymbol.valueDeclaration;
+            if (localOrExportSymbol.flags & 32 /* Class */) {
+                // Due to the emit for class decorators, any reference to the class from inside of the class body
+                // must instead be rewritten to point to a temporary variable to avoid issues with the double-bind
+                // behavior of class names in ES6.
+                if (declaration.kind === 235 /* ClassDeclaration */
+                    && ts.nodeIsDecorated(declaration)) {
+                    var container = ts.getContainingClass(node);
+                    while (container !== undefined) {
+                        if (container === declaration && container.name !== node) {
+                            getNodeLinks(declaration).flags |= 8388608 /* ClassWithConstructorReference */;
+                            getNodeLinks(node).flags |= 16777216 /* ConstructorReferenceInClass */;
+                            break;
+                        }
+                        container = ts.getContainingClass(container);
+                    }
+                }
+                else if (declaration.kind === 205 /* ClassExpression */) {
+                    // When we emit a class expression with static members that contain a reference
+                    // to the constructor in the initializer, we will need to substitute that
+                    // binding with an alias as the class name is not in scope.
+                    var container = ts.getThisContainer(node, /*includeArrowFunctions*/ false);
+                    while (container.kind !== 274 /* SourceFile */) {
+                        if (container.parent === declaration) {
+                            if (container.kind === 152 /* PropertyDeclaration */ && ts.hasModifier(container, 32 /* Static */)) {
+                                getNodeLinks(declaration).flags |= 8388608 /* ClassWithConstructorReference */;
+                                getNodeLinks(node).flags |= 16777216 /* ConstructorReferenceInClass */;
+                            }
+                            break;
+                        }
+                        container = ts.getThisContainer(container, /*includeArrowFunctions*/ false);
+                    }
+                }
+            }
+            checkNestedBlockScopedBinding(node, symbol);
+            var type = getConstraintForLocation(getTypeOfSymbol(localOrExportSymbol), node);
+            var assignmentKind = ts.getAssignmentTargetKind(node);
+            if (assignmentKind) {
+                if (!(localOrExportSymbol.flags & 3 /* Variable */) &&
+                    !(ts.isInJavaScriptFile(node) && localOrExportSymbol.flags & 512 /* ValueModule */)) {
+                    error(node, ts.Diagnostics.Cannot_assign_to_0_because_it_is_not_a_variable, symbolToString(symbol));
+                    return errorType;
+                }
+                if (isReadonlySymbol(localOrExportSymbol)) {
+                    error(node, ts.Diagnostics.Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property, symbolToString(symbol));
+                    return errorType;
+                }
+            }
+            var isAlias = localOrExportSymbol.flags & 2097152 /* Alias */;
+            // We only narrow variables and parameters occurring in a non-assignment position. For all other
+            // entities we simply return the declared type.
+            if (localOrExportSymbol.flags & 3 /* Variable */) {
+                if (assignmentKind === 1 /* Definite */) {
+                    return type;
+                }
+            }
+            else if (isAlias) {
+                declaration = ts.find(symbol.declarations, isSomeImportDeclaration);
+            }
+            else {
+                return type;
+            }
+            if (!declaration) {
+                return type;
+            }
+            // The declaration container is the innermost function that encloses the declaration of the variable
+            // or parameter. The flow container is the innermost function starting with which we analyze the control
+            // flow graph to determine the control flow based type.
+            var isParameter = ts.getRootDeclaration(declaration).kind === 149 /* Parameter */;
+            var declarationContainer = getControlFlowContainer(declaration);
+            var flowContainer = getControlFlowContainer(node);
+            var isOuterVariable = flowContainer !== declarationContainer;
+            var isSpreadDestructuringAsignmentTarget = node.parent && node.parent.parent && ts.isSpreadAssignment(node.parent) && isDestructuringAssignmentTarget(node.parent.parent);
+            // When the control flow originates in a function expression or arrow function and we are referencing
+            // a const variable or parameter from an outer function, we extend the origin of the control flow
+            // analysis to include the immediately enclosing function.
+            while (flowContainer !== declarationContainer && (flowContainer.kind === 192 /* FunctionExpression */ ||
+                flowContainer.kind === 193 /* ArrowFunction */ || ts.isObjectLiteralOrClassExpressionMethod(flowContainer)) &&
+                (isConstVariable(localOrExportSymbol) || isParameter && !isParameterAssigned(localOrExportSymbol))) {
+                flowContainer = getControlFlowContainer(flowContainer);
+            }
+            // We only look for uninitialized variables in strict null checking mode, and only when we can analyze
+            // the entire control flow graph from the variable's declaration (i.e. when the flow container and
+            // declaration container are the same).
+            var assumeInitialized = isParameter || isAlias || isOuterVariable || isSpreadDestructuringAsignmentTarget ||
+                type !== autoType && type !== autoArrayType && (!strictNullChecks || (type.flags & 3 /* AnyOrUnknown */) !== 0 ||
+                    isInTypeQuery(node) || node.parent.kind === 252 /* ExportSpecifier */) ||
+                node.parent.kind === 209 /* NonNullExpression */ ||
+                declaration.kind === 232 /* VariableDeclaration */ && declaration.exclamationToken ||
+                declaration.flags & 4194304 /* Ambient */;
+            var initialType = assumeInitialized ? (isParameter ? removeOptionalityFromDeclaredType(type, declaration) : type) :
+                type === autoType || type === autoArrayType ? undefinedType :
+                    getOptionalType(type);
+            var flowType = getFlowTypeOfReference(node, type, initialType, flowContainer, !assumeInitialized);
+            // A variable is considered uninitialized when it is possible to analyze the entire control flow graph
+            // from declaration to use, and when the variable's declared type doesn't include undefined but the
+            // control flow based type does include undefined.
+            if (type === autoType || type === autoArrayType) {
+                if (flowType === autoType || flowType === autoArrayType) {
+                    if (noImplicitAny) {
+                        error(ts.getNameOfDeclaration(declaration), ts.Diagnostics.Variable_0_implicitly_has_type_1_in_some_locations_where_its_type_cannot_be_determined, symbolToString(symbol), typeToString(flowType));
+                        error(node, ts.Diagnostics.Variable_0_implicitly_has_an_1_type, symbolToString(symbol), typeToString(flowType));
+                    }
+                    return convertAutoToAny(flowType);
+                }
+            }
+            else if (!assumeInitialized && !(getFalsyFlags(type) & 8192 /* Undefined */) && getFalsyFlags(flowType) & 8192 /* Undefined */) {
+                error(node, ts.Diagnostics.Variable_0_is_used_before_being_assigned, symbolToString(symbol));
+                // Return the declared type to reduce follow-on errors
+                return type;
+            }
+            return assignmentKind ? getBaseTypeOfLiteralType(flowType) : flowType;
+        }
+        function isInsideFunction(node, threshold) {
+            return !!ts.findAncestor(node, function (n) { return n === threshold ? "quit" : ts.isFunctionLike(n); });
+        }
+        function checkNestedBlockScopedBinding(node, symbol) {
+            if (languageVersion >= 2 /* ES2015 */ ||
+                (symbol.flags & (2 /* BlockScopedVariable */ | 32 /* Class */)) === 0 ||
+                symbol.valueDeclaration.parent.kind === 269 /* CatchClause */) {
+                return;
+            }
+            // 1. walk from the use site up to the declaration and check
+            // if there is anything function like between declaration and use-site (is binding/class is captured in function).
+            // 2. walk from the declaration up to the boundary of lexical environment and check
+            // if there is an iteration statement in between declaration and boundary (is binding/class declared inside iteration statement)
+            var container = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
+            var usedInFunction = isInsideFunction(node.parent, container);
+            var current = container;
+            var containedInIterationStatement = false;
+            while (current && !ts.nodeStartsNewLexicalEnvironment(current)) {
+                if (ts.isIterationStatement(current, /*lookInLabeledStatements*/ false)) {
+                    containedInIterationStatement = true;
+                    break;
+                }
+                current = current.parent;
+            }
+            if (containedInIterationStatement) {
+                if (usedInFunction) {
+                    // mark iteration statement as containing block-scoped binding captured in some function
+                    getNodeLinks(current).flags |= 65536 /* LoopWithCapturedBlockScopedBinding */;
+                }
+                // mark variables that are declared in loop initializer and reassigned inside the body of ForStatement.
+                // if body of ForStatement will be converted to function then we'll need a extra machinery to propagate reassigned values back.
+                if (container.kind === 220 /* ForStatement */ &&
+                    ts.getAncestor(symbol.valueDeclaration, 233 /* VariableDeclarationList */).parent === container &&
+                    isAssignedInBodyOfForStatement(node, container)) {
+                    getNodeLinks(symbol.valueDeclaration).flags |= 2097152 /* NeedsLoopOutParameter */;
+                }
+                // set 'declared inside loop' bit on the block-scoped binding
+                getNodeLinks(symbol.valueDeclaration).flags |= 262144 /* BlockScopedBindingInLoop */;
+            }
+            if (usedInFunction) {
+                getNodeLinks(symbol.valueDeclaration).flags |= 131072 /* CapturedBlockScopedBinding */;
+            }
+        }
+        function isAssignedInBodyOfForStatement(node, container) {
+            // skip parenthesized nodes
+            var current = node;
+            while (current.parent.kind === 191 /* ParenthesizedExpression */) {
+                current = current.parent;
+            }
+            // check if node is used as LHS in some assignment expression
+            var isAssigned = false;
+            if (ts.isAssignmentTarget(current)) {
+                isAssigned = true;
+            }
+            else if ((current.parent.kind === 198 /* PrefixUnaryExpression */ || current.parent.kind === 199 /* PostfixUnaryExpression */)) {
+                var expr = current.parent;
+                isAssigned = expr.operator === 43 /* PlusPlusToken */ || expr.operator === 44 /* MinusMinusToken */;
+            }
+            if (!isAssigned) {
+                return false;
+            }
+            // at this point we know that node is the target of assignment
+            // now check that modification happens inside the statement part of the ForStatement
+            return !!ts.findAncestor(current, function (n) { return n === container ? "quit" : n === container.statement; });
+        }
+        function captureLexicalThis(node, container) {
+            getNodeLinks(node).flags |= 2 /* LexicalThis */;
+            if (container.kind === 152 /* PropertyDeclaration */ || container.kind === 155 /* Constructor */) {
+                var classNode = container.parent;
+                getNodeLinks(classNode).flags |= 4 /* CaptureThis */;
+            }
+            else {
+                getNodeLinks(container).flags |= 4 /* CaptureThis */;
+            }
+        }
+        function findFirstSuperCall(n) {
+            if (ts.isSuperCall(n)) {
+                return n;
+            }
+            else if (ts.isFunctionLike(n)) {
+                return undefined;
+            }
+            return ts.forEachChild(n, findFirstSuperCall);
+        }
+        /**
+         * Return a cached result if super-statement is already found.
+         * Otherwise, find a super statement in a given constructor function and cache the result in the node-links of the constructor
+         *
+         * @param constructor constructor-function to look for super statement
+         */
+        function getSuperCallInConstructor(constructor) {
+            var links = getNodeLinks(constructor);
+            // Only trying to find super-call if we haven't yet tried to find one.  Once we try, we will record the result
+            if (links.hasSuperCall === undefined) {
+                links.superCall = findFirstSuperCall(constructor.body);
+                links.hasSuperCall = links.superCall ? true : false;
+            }
+            return links.superCall;
+        }
+        /**
+         * Check if the given class-declaration extends null then return true.
+         * Otherwise, return false
+         * @param classDecl a class declaration to check if it extends null
+         */
+        function classDeclarationExtendsNull(classDecl) {
+            var classSymbol = getSymbolOfNode(classDecl);
+            var classInstanceType = getDeclaredTypeOfSymbol(classSymbol);
+            var baseConstructorType = getBaseConstructorTypeOfClass(classInstanceType);
+            return baseConstructorType === nullWideningType;
+        }
+        function checkThisBeforeSuper(node, container, diagnosticMessage) {
+            var containingClassDecl = container.parent;
+            var baseTypeNode = ts.getClassExtendsHeritageClauseElement(containingClassDecl);
+            // If a containing class does not have extends clause or the class extends null
+            // skip checking whether super statement is called before "this" accessing.
+            if (baseTypeNode && !classDeclarationExtendsNull(containingClassDecl)) {
+                var superCall = getSuperCallInConstructor(container);
+                // We should give an error in the following cases:
+                //      - No super-call
+                //      - "this" is accessing before super-call.
+                //          i.e super(this)
+                //              this.x; super();
+                // We want to make sure that super-call is done before accessing "this" so that
+                // "this" is not accessed as a parameter of the super-call.
+                if (!superCall || superCall.end > node.pos) {
+                    // In ES6, super inside constructor of class-declaration has to precede "this" accessing
+                    error(node, diagnosticMessage);
+                }
+            }
+        }
+        function checkThisExpression(node) {
+            // Stop at the first arrow function so that we can
+            // tell whether 'this' needs to be captured.
+            var container = ts.getThisContainer(node, /* includeArrowFunctions */ true);
+            var needToCaptureLexicalThis = false;
+            if (container.kind === 155 /* Constructor */) {
+                checkThisBeforeSuper(node, container, ts.Diagnostics.super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class);
+            }
+            // Now skip arrow functions to get the "real" owner of 'this'.
+            if (container.kind === 193 /* ArrowFunction */) {
+                container = ts.getThisContainer(container, /* includeArrowFunctions */ false);
+                // When targeting es6, arrow function lexically bind "this" so we do not need to do the work of binding "this" in emitted code
+                needToCaptureLexicalThis = (languageVersion < 2 /* ES2015 */);
+            }
+            switch (container.kind) {
+                case 239 /* ModuleDeclaration */:
+                    error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_module_or_namespace_body);
+                    // do not return here so in case if lexical this is captured - it will be reflected in flags on NodeLinks
+                    break;
+                case 238 /* EnumDeclaration */:
+                    error(node, ts.Diagnostics.this_cannot_be_referenced_in_current_location);
+                    // do not return here so in case if lexical this is captured - it will be reflected in flags on NodeLinks
+                    break;
+                case 155 /* Constructor */:
+                    if (isInConstructorArgumentInitializer(node, container)) {
+                        error(node, ts.Diagnostics.this_cannot_be_referenced_in_constructor_arguments);
+                        // do not return here so in case if lexical this is captured - it will be reflected in flags on NodeLinks
+                    }
+                    break;
+                case 152 /* PropertyDeclaration */:
+                case 151 /* PropertySignature */:
+                    if (ts.hasModifier(container, 32 /* Static */)) {
+                        error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_static_property_initializer);
+                        // do not return here so in case if lexical this is captured - it will be reflected in flags on NodeLinks
+                    }
+                    break;
+                case 147 /* ComputedPropertyName */:
+                    error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_computed_property_name);
+                    break;
+            }
+            if (needToCaptureLexicalThis) {
+                captureLexicalThis(node, container);
+            }
+            var type = tryGetThisTypeAt(node, container);
+            if (!type && noImplicitThis) {
+                // With noImplicitThis, functions may not reference 'this' if it has type 'any'
+                error(node, ts.Diagnostics.this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation);
+            }
+            return type || anyType;
+        }
+        function tryGetThisTypeAt(node, container) {
+            if (container === void 0) { container = ts.getThisContainer(node, /*includeArrowFunctions*/ false); }
+            if (ts.isFunctionLike(container) &&
+                (!isInParameterInitializerBeforeContainingFunction(node) || ts.getThisParameter(container))) {
+                // Note: a parameter initializer should refer to class-this unless function-this is explicitly annotated.
+                // If this is a function in a JS file, it might be a class method. Check if it's the RHS
+                // of a x.prototype.y = function [name]() { .... }
+                if (container.kind === 192 /* FunctionExpression */ &&
+                    container.parent.kind === 200 /* BinaryExpression */ &&
+                    ts.getSpecialPropertyAssignmentKind(container.parent) === 3 /* PrototypeProperty */) {
+                    // Get the 'x' of 'x.prototype.y = f' (here, 'f' is 'container')
+                    var className = container.parent // x.prototype.y = f
+                        .left // x.prototype.y
+                        .expression // x.prototype
+                        .expression; // x
+                    var classSymbol = checkExpression(className).symbol;
+                    if (classSymbol && classSymbol.members && (classSymbol.flags & 16 /* Function */)) {
+                        return getFlowTypeOfReference(node, getInferredClassType(classSymbol));
+                    }
+                }
+                var thisType = getThisTypeOfDeclaration(container) || getContextualThisParameterType(container);
+                if (thisType) {
+                    return getFlowTypeOfReference(node, thisType);
+                }
+            }
+            if (ts.isClassLike(container.parent)) {
+                var symbol = getSymbolOfNode(container.parent);
+                var type = ts.hasModifier(container, 32 /* Static */) ? getTypeOfSymbol(symbol) : getDeclaredTypeOfSymbol(symbol).thisType;
+                return getFlowTypeOfReference(node, type);
+            }
+            if (ts.isInJavaScriptFile(node)) {
+                var type = getTypeForThisExpressionFromJSDoc(container);
+                if (type && type !== errorType) {
+                    return getFlowTypeOfReference(node, type);
+                }
+            }
+        }
+        function getTypeForThisExpressionFromJSDoc(node) {
+            var jsdocType = ts.getJSDocType(node);
+            if (jsdocType && jsdocType.kind === 284 /* JSDocFunctionType */) {
+                var jsDocFunctionType = jsdocType;
+                if (jsDocFunctionType.parameters.length > 0 &&
+                    jsDocFunctionType.parameters[0].name &&
+                    jsDocFunctionType.parameters[0].name.escapedText === "this") {
+                    return getTypeFromTypeNode(jsDocFunctionType.parameters[0].type);
+                }
+            }
+        }
+        function isInConstructorArgumentInitializer(node, constructorDecl) {
+            return !!ts.findAncestor(node, function (n) { return n === constructorDecl ? "quit" : n.kind === 149 /* Parameter */; });
+        }
+        function checkSuperExpression(node) {
+            var isCallExpression = node.parent.kind === 187 /* CallExpression */ && node.parent.expression === node;
+            var container = ts.getSuperContainer(node, /*stopOnFunctions*/ true);
+            var needToCaptureLexicalThis = false;
+            // adjust the container reference in case if super is used inside arrow functions with arbitrarily deep nesting
+            if (!isCallExpression) {
+                while (container && container.kind === 193 /* ArrowFunction */) {
+                    container = ts.getSuperContainer(container, /*stopOnFunctions*/ true);
+                    needToCaptureLexicalThis = languageVersion < 2 /* ES2015 */;
+                }
+            }
+            var canUseSuperExpression = isLegalUsageOfSuperExpression(container);
+            var nodeCheckFlag = 0;
+            if (!canUseSuperExpression) {
+                // issue more specific error if super is used in computed property name
+                // class A { foo() { return "1" }}
+                // class B {
+                //     [super.foo()]() {}
+                // }
+                var current = ts.findAncestor(node, function (n) { return n === container ? "quit" : n.kind === 147 /* ComputedPropertyName */; });
+                if (current && current.kind === 147 /* ComputedPropertyName */) {
+                    error(node, ts.Diagnostics.super_cannot_be_referenced_in_a_computed_property_name);
+                }
+                else if (isCallExpression) {
+                    error(node, ts.Diagnostics.Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors);
+                }
+                else if (!container || !container.parent || !(ts.isClassLike(container.parent) || container.parent.kind === 184 /* ObjectLiteralExpression */)) {
+                    error(node, ts.Diagnostics.super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions);
+                }
+                else {
+                    error(node, ts.Diagnostics.super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_derived_class);
+                }
+                return errorType;
+            }
+            if (!isCallExpression && container.kind === 155 /* Constructor */) {
+                checkThisBeforeSuper(node, container, ts.Diagnostics.super_must_be_called_before_accessing_a_property_of_super_in_the_constructor_of_a_derived_class);
+            }
+            if (ts.hasModifier(container, 32 /* Static */) || isCallExpression) {
+                nodeCheckFlag = 512 /* SuperStatic */;
+            }
+            else {
+                nodeCheckFlag = 256 /* SuperInstance */;
+            }
+            getNodeLinks(node).flags |= nodeCheckFlag;
+            // Due to how we emit async functions, we need to specialize the emit for an async method that contains a `super` reference.
+            // This is due to the fact that we emit the body of an async function inside of a generator function. As generator
+            // functions cannot reference `super`, we emit a helper inside of the method body, but outside of the generator. This helper
+            // uses an arrow function, which is permitted to reference `super`.
+            //
+            // There are two primary ways we can access `super` from within an async method. The first is getting the value of a property
+            // or indexed access on super, either as part of a right-hand-side expression or call expression. The second is when setting the value
+            // of a property or indexed access, either as part of an assignment expression or destructuring assignment.
+            //
+            // The simplest case is reading a value, in which case we will emit something like the following:
+            //
+            //  // ts
+            //  ...
+            //  async asyncMethod() {
+            //    let x = await super.asyncMethod();
+            //    return x;
+            //  }
+            //  ...
+            //
+            //  // js
+            //  ...
+            //  asyncMethod() {
+            //      const _super = name => super[name];
+            //      return __awaiter(this, arguments, Promise, function *() {
+            //          let x = yield _super("asyncMethod").call(this);
+            //          return x;
+            //      });
+            //  }
+            //  ...
+            //
+            // The more complex case is when we wish to assign a value, especially as part of a destructuring assignment. As both cases
+            // are legal in ES6, but also likely less frequent, we emit the same more complex helper for both scenarios:
+            //
+            //  // ts
+            //  ...
+            //  async asyncMethod(ar: Promise<any[]>) {
+            //      [super.a, super.b] = await ar;
+            //  }
+            //  ...
+            //
+            //  // js
+            //  ...
+            //  asyncMethod(ar) {
+            //      const _super = (function (geti, seti) {
+            //          const cache = Object.create(null);
+            //          return name => cache[name] || (cache[name] = { get value() { return geti(name); }, set value(v) { seti(name, v); } });
+            //      })(name => super[name], (name, value) => super[name] = value);
+            //      return __awaiter(this, arguments, Promise, function *() {
+            //          [_super("a").value, _super("b").value] = yield ar;
+            //      });
+            //  }
+            //  ...
+            //
+            // This helper creates an object with a "value" property that wraps the `super` property or indexed access for both get and set.
+            // This is required for destructuring assignments, as a call expression cannot be used as the target of a destructuring assignment
+            // while a property access can.
+            if (container.kind === 154 /* MethodDeclaration */ && ts.hasModifier(container, 256 /* Async */)) {
+                if (ts.isSuperProperty(node.parent) && ts.isAssignmentTarget(node.parent)) {
+                    getNodeLinks(container).flags |= 4096 /* AsyncMethodWithSuperBinding */;
+                }
+                else {
+                    getNodeLinks(container).flags |= 2048 /* AsyncMethodWithSuper */;
+                }
+            }
+            if (needToCaptureLexicalThis) {
+                // call expressions are allowed only in constructors so they should always capture correct 'this'
+                // super property access expressions can also appear in arrow functions -
+                // in this case they should also use correct lexical this
+                captureLexicalThis(node.parent, container);
+            }
+            if (container.parent.kind === 184 /* ObjectLiteralExpression */) {
+                if (languageVersion < 2 /* ES2015 */) {
+                    error(node, ts.Diagnostics.super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_higher);
+                    return errorType;
+                }
+                else {
+                    // for object literal assume that type of 'super' is 'any'
+                    return anyType;
+                }
+            }
+            // at this point the only legal case for parent is ClassLikeDeclaration
+            var classLikeDeclaration = container.parent;
+            if (!ts.getClassExtendsHeritageClauseElement(classLikeDeclaration)) {
+                error(node, ts.Diagnostics.super_can_only_be_referenced_in_a_derived_class);
+                return errorType;
+            }
+            var classType = getDeclaredTypeOfSymbol(getSymbolOfNode(classLikeDeclaration));
+            var baseClassType = classType && getBaseTypes(classType)[0];
+            if (!baseClassType) {
+                return errorType;
+            }
+            if (container.kind === 155 /* Constructor */ && isInConstructorArgumentInitializer(node, container)) {
+                // issue custom error message for super property access in constructor arguments (to be aligned with old compiler)
+                error(node, ts.Diagnostics.super_cannot_be_referenced_in_constructor_arguments);
+                return errorType;
+            }
+            return nodeCheckFlag === 512 /* SuperStatic */
+                ? getBaseConstructorTypeOfClass(classType)
+                : getTypeWithThisArgument(baseClassType, classType.thisType);
+            function isLegalUsageOfSuperExpression(container) {
+                if (!container) {
+                    return false;
+                }
+                if (isCallExpression) {
+                    // TS 1.0 SPEC (April 2014): 4.8.1
+                    // Super calls are only permitted in constructors of derived classes
+                    return container.kind === 155 /* Constructor */;
+                }
+                else {
+                    // TS 1.0 SPEC (April 2014)
+                    // 'super' property access is allowed
+                    // - In a constructor, instance member function, instance member accessor, or instance member variable initializer where this references a derived class instance
+                    // - In a static member function or static member accessor
+                    // topmost container must be something that is directly nested in the class declaration\object literal expression
+                    if (ts.isClassLike(container.parent) || container.parent.kind === 184 /* ObjectLiteralExpression */) {
+                        if (ts.hasModifier(container, 32 /* Static */)) {
+                            return container.kind === 154 /* MethodDeclaration */ ||
+                                container.kind === 153 /* MethodSignature */ ||
+                                container.kind === 156 /* GetAccessor */ ||
+                                container.kind === 157 /* SetAccessor */;
+                        }
+                        else {
+                            return container.kind === 154 /* MethodDeclaration */ ||
+                                container.kind === 153 /* MethodSignature */ ||
+                                container.kind === 156 /* GetAccessor */ ||
+                                container.kind === 157 /* SetAccessor */ ||
+                                container.kind === 152 /* PropertyDeclaration */ ||
+                                container.kind === 151 /* PropertySignature */ ||
+                                container.kind === 155 /* Constructor */;
+                        }
+                    }
+                }
+                return false;
+            }
+        }
+        function getContainingObjectLiteral(func) {
+            return (func.kind === 154 /* MethodDeclaration */ ||
+                func.kind === 156 /* GetAccessor */ ||
+                func.kind === 157 /* SetAccessor */) && func.parent.kind === 184 /* ObjectLiteralExpression */ ? func.parent :
+                func.kind === 192 /* FunctionExpression */ && func.parent.kind === 270 /* PropertyAssignment */ ? func.parent.parent :
+                    undefined;
+        }
+        function getThisTypeArgument(type) {
+            return ts.getObjectFlags(type) & 4 /* Reference */ && type.target === globalThisType ? type.typeArguments[0] : undefined;
+        }
+        function getThisTypeFromContextualType(type) {
+            return mapType(type, function (t) {
+                return t.flags & 524288 /* Intersection */ ? ts.forEach(t.types, getThisTypeArgument) : getThisTypeArgument(t);
+            });
+        }
+        function getContextualThisParameterType(func) {
+            if (func.kind === 193 /* ArrowFunction */) {
+                return undefined;
+            }
+            if (isContextSensitiveFunctionOrObjectLiteralMethod(func)) {
+                var contextualSignature = getContextualSignature(func);
+                if (contextualSignature) {
+                    var thisParameter = contextualSignature.thisParameter;
+                    if (thisParameter) {
+                        return getTypeOfSymbol(thisParameter);
+                    }
+                }
+            }
+            var inJs = ts.isInJavaScriptFile(func);
+            if (noImplicitThis || inJs) {
+                var containingLiteral = getContainingObjectLiteral(func);
+                if (containingLiteral) {
+                    // We have an object literal method. Check if the containing object literal has a contextual type
+                    // that includes a ThisType<T>. If so, T is the contextual type for 'this'. We continue looking in
+                    // any directly enclosing object literals.
+                    var contextualType = getApparentTypeOfContextualType(containingLiteral);
+                    var literal = containingLiteral;
+                    var type = contextualType;
+                    while (type) {
+                        var thisType = getThisTypeFromContextualType(type);
+                        if (thisType) {
+                            return instantiateType(thisType, getContextualMapper(containingLiteral));
+                        }
+                        if (literal.parent.kind !== 270 /* PropertyAssignment */) {
+                            break;
+                        }
+                        literal = literal.parent.parent;
+                        type = getApparentTypeOfContextualType(literal);
+                    }
+                    // There was no contextual ThisType<T> for the containing object literal, so the contextual type
+                    // for 'this' is the non-null form of the contextual type for the containing object literal or
+                    // the type of the object literal itself.
+                    return contextualType ? getNonNullableType(contextualType) : checkExpressionCached(containingLiteral);
+                }
+                // In an assignment of the form 'obj.xxx = function(...)' or 'obj[xxx] = function(...)', the
+                // contextual type for 'this' is 'obj'.
+                var parent = func.parent;
+                if (parent.kind === 200 /* BinaryExpression */ && parent.operatorToken.kind === 58 /* EqualsToken */) {
+                    var target = parent.left;
+                    if (target.kind === 185 /* PropertyAccessExpression */ || target.kind === 186 /* ElementAccessExpression */) {
+                        var expression = target.expression;
+                        // Don't contextually type `this` as `exports` in `exports.Point = function(x, y) { this.x = x; this.y = y; }`
+                        if (inJs && ts.isIdentifier(expression)) {
+                            var sourceFile = ts.getSourceFileOfNode(parent);
+                            if (sourceFile.commonJsModuleIndicator && getResolvedSymbol(expression) === sourceFile.symbol) {
+                                return undefined;
+                            }
+                        }
+                        return checkExpressionCached(expression);
+                    }
+                }
+            }
+            return undefined;
+        }
+        // Return contextual type of parameter or undefined if no contextual type is available
+        function getContextuallyTypedParameterType(parameter) {
+            var func = parameter.parent;
+            if (!isContextSensitiveFunctionOrObjectLiteralMethod(func)) {
+                return undefined;
+            }
+            var iife = ts.getImmediatelyInvokedFunctionExpression(func);
+            if (iife && iife.arguments) {
+                var indexOfParameter = func.parameters.indexOf(parameter);
+                if (parameter.dotDotDotToken) {
+                    var restTypes = [];
+                    for (var i = indexOfParameter; i < iife.arguments.length; i++) {
+                        restTypes.push(getWidenedLiteralType(checkExpression(iife.arguments[i])));
+                    }
+                    return restTypes.length ? createArrayType(getUnionType(restTypes)) : undefined;
+                }
+                var links = getNodeLinks(iife);
+                var cached = links.resolvedSignature;
+                links.resolvedSignature = anySignature;
+                var type = indexOfParameter < iife.arguments.length ?
+                    getWidenedLiteralType(checkExpression(iife.arguments[indexOfParameter])) :
+                    parameter.initializer ? undefined : undefinedWideningType;
+                links.resolvedSignature = cached;
+                return type;
+            }
+            var contextualSignature = getContextualSignature(func);
+            if (contextualSignature) {
+                var funcHasRestParameters = ts.hasRestParameter(func);
+                var len = func.parameters.length - (funcHasRestParameters ? 1 : 0);
+                var indexOfParameter = func.parameters.indexOf(parameter);
+                if (ts.getThisParameter(func) !== undefined && !contextualSignature.thisParameter) {
+                    ts.Debug.assert(indexOfParameter !== 0); // Otherwise we should not have called `getContextuallyTypedParameterType`.
+                    indexOfParameter -= 1;
+                }
+                if (indexOfParameter < len) {
+                    return getTypeAtPosition(contextualSignature, indexOfParameter);
+                }
+                // If last parameter is contextually rest parameter get its type
+                if (funcHasRestParameters &&
+                    indexOfParameter === (func.parameters.length - 1) &&
+                    isRestParameterIndex(contextualSignature, func.parameters.length - 1)) {
+                    return getTypeOfSymbol(ts.last(contextualSignature.parameters));
+                }
+            }
+        }
+        // In a variable, parameter or property declaration with a type annotation,
+        //   the contextual type of an initializer expression is the type of the variable, parameter or property.
+        // Otherwise, in a parameter declaration of a contextually typed function expression,
+        //   the contextual type of an initializer expression is the contextual type of the parameter.
+        // Otherwise, in a variable or parameter declaration with a binding pattern name,
+        //   the contextual type of an initializer expression is the type implied by the binding pattern.
+        // Otherwise, in a binding pattern inside a variable or parameter declaration,
+        //   the contextual type of an initializer expression is the type annotation of the containing declaration, if present.
+        function getContextualTypeForInitializerExpression(node) {
+            var declaration = node.parent;
+            if (ts.hasInitializer(declaration) && node === declaration.initializer) {
+                var typeNode = ts.getEffectiveTypeAnnotationNode(declaration);
+                if (typeNode) {
+                    return getTypeFromTypeNode(typeNode);
+                }
+                if (declaration.kind === 149 /* Parameter */) {
+                    var type = getContextuallyTypedParameterType(declaration);
+                    if (type) {
+                        return type;
+                    }
+                }
+                if (ts.isBindingPattern(declaration.name)) {
+                    return getTypeFromBindingPattern(declaration.name, /*includePatternInType*/ true, /*reportErrors*/ false);
+                }
+                if (ts.isBindingPattern(declaration.parent)) {
+                    var parentDeclaration = declaration.parent.parent;
+                    var name = declaration.propertyName || declaration.name;
+                    if (parentDeclaration.kind !== 182 /* BindingElement */) {
+                        var parentTypeNode = ts.getEffectiveTypeAnnotationNode(parentDeclaration);
+                        if (parentTypeNode && !ts.isBindingPattern(name)) {
+                            var text = ts.getTextOfPropertyName(name);
+                            if (text) {
+                                return getTypeOfPropertyOfType(getTypeFromTypeNode(parentTypeNode), text);
+                            }
+                        }
+                    }
+                }
+            }
+            return undefined;
+        }
+        function getContextualTypeForReturnExpression(node) {
+            var func = ts.getContainingFunction(node);
+            if (func) {
+                var functionFlags = ts.getFunctionFlags(func);
+                if (functionFlags & 1 /* Generator */) { // AsyncGenerator function or Generator function
+                    return undefined;
+                }
+                var contextualReturnType = getContextualReturnType(func);
+                return functionFlags & 2 /* Async */
+                    ? contextualReturnType && getAwaitedTypeOfPromise(contextualReturnType) // Async function
+                    : contextualReturnType; // Regular function
+            }
+            return undefined;
+        }
+        function getContextualTypeForYieldOperand(node) {
+            var func = ts.getContainingFunction(node);
+            if (func) {
+                var functionFlags = ts.getFunctionFlags(func);
+                var contextualReturnType = getContextualReturnType(func);
+                if (contextualReturnType) {
+                    return node.asteriskToken
+                        ? contextualReturnType
+                        : getIteratedTypeOfGenerator(contextualReturnType, (functionFlags & 2 /* Async */) !== 0);
+                }
+            }
+            return undefined;
+        }
+        function isInParameterInitializerBeforeContainingFunction(node) {
+            var inBindingInitializer = false;
+            while (node.parent && !ts.isFunctionLike(node.parent)) {
+                if (ts.isParameter(node.parent) && (inBindingInitializer || node.parent.initializer === node)) {
+                    return true;
+                }
+                if (ts.isBindingElement(node.parent) && node.parent.initializer === node) {
+                    inBindingInitializer = true;
+                }
+                node = node.parent;
+            }
+            return false;
+        }
+        function getContextualReturnType(functionDecl) {
+            // If the containing function has a return type annotation, is a constructor, or is a get accessor whose
+            // corresponding set accessor has a type annotation, return statements in the function are contextually typed
+            if (functionDecl.kind === 155 /* Constructor */ ||
+                ts.getEffectiveReturnTypeNode(functionDecl) ||
+                isGetAccessorWithAnnotatedSetAccessor(functionDecl)) {
+                return getReturnTypeOfSignature(getSignatureFromDeclaration(functionDecl));
+            }
+            // Otherwise, if the containing function is contextually typed by a function type with exactly one call signature
+            // and that call signature is non-generic, return statements are contextually typed by the return type of the signature
+            var signature = getContextualSignatureForFunctionLikeDeclaration(functionDecl);
+            if (signature && !isResolvingReturnTypeOfSignature(signature)) {
+                return getReturnTypeOfSignature(signature);
+            }
+            return undefined;
+        }
+        // In a typed function call, an argument or substitution expression is contextually typed by the type of the corresponding parameter.
+        function getContextualTypeForArgument(callTarget, arg) {
+            var args = getEffectiveCallArguments(callTarget); // TODO: GH#18217
+            var argIndex = args.indexOf(arg); // -1 for e.g. the expression of a CallExpression, or the tag of a TaggedTemplateExpression
+            return argIndex === -1 ? undefined : getContextualTypeForArgumentAtIndex(callTarget, argIndex);
+        }
+        function getContextualTypeForArgumentAtIndex(callTarget, argIndex) {
+            // If we're already in the process of resolving the given signature, don't resolve again as
+            // that could cause infinite recursion. Instead, return anySignature.
+            var signature = getNodeLinks(callTarget).resolvedSignature === resolvingSignature ? resolvingSignature : getResolvedSignature(callTarget);
+            return getTypeAtPosition(signature, argIndex);
+        }
+        function getContextualTypeForSubstitutionExpression(template, substitutionExpression) {
+            if (template.parent.kind === 189 /* TaggedTemplateExpression */) {
+                return getContextualTypeForArgument(template.parent, substitutionExpression);
+            }
+            return undefined;
+        }
+        function getContextualTypeForBinaryOperand(node) {
+            var binaryExpression = node.parent;
+            var left = binaryExpression.left, operatorToken = binaryExpression.operatorToken, right = binaryExpression.right;
+            switch (operatorToken.kind) {
+                case 58 /* EqualsToken */:
+                    return node === right && isContextSensitiveAssignment(binaryExpression) ? getTypeOfExpression(left) : undefined;
+                case 54 /* BarBarToken */:
+                    // When an || expression has a contextual type, the operands are contextually typed by that type. When an ||
+                    // expression has no contextual type, the right operand is contextually typed by the type of the left operand,
+                    // except for the special case of Javascript declarations of the form `namespace.prop = namespace.prop || {}`
+                    var type = getContextualType(binaryExpression);
+                    return !type && node === right && !ts.isDefaultedJavascriptInitializer(binaryExpression) ?
+                        getTypeOfExpression(left) : type;
+                case 53 /* AmpersandAmpersandToken */:
+                case 26 /* CommaToken */:
+                    return node === right ? getContextualType(binaryExpression) : undefined;
+                default:
+                    return undefined;
+            }
+        }
+        // In an assignment expression, the right operand is contextually typed by the type of the left operand.
+        // Don't do this for special property assignments to avoid circularity.
+        function isContextSensitiveAssignment(binaryExpression) {
+            var kind = ts.getSpecialPropertyAssignmentKind(binaryExpression);
+            switch (kind) {
+                case 0 /* None */:
+                    return true;
+                case 5 /* Property */:
+                    // If `binaryExpression.left` was assigned a symbol, then this is a new declaration; otherwise it is an assignment to an existing declaration.
+                    // See `bindStaticPropertyAssignment` in `binder.ts`.
+                    return !binaryExpression.left.symbol;
+                case 1 /* ExportsProperty */:
+                case 2 /* ModuleExports */:
+                case 3 /* PrototypeProperty */:
+                case 4 /* ThisProperty */:
+                case 6 /* Prototype */:
+                    return false;
+                default:
+                    return ts.Debug.assertNever(kind);
+            }
+        }
+        function getTypeOfPropertyOfContextualType(type, name) {
+            return mapType(type, function (t) {
+                var prop = t.flags & 917504 /* StructuredType */ ? getPropertyOfType(t, name) : undefined;
+                return prop ? getTypeOfSymbol(prop) : undefined;
+            }, /*noReductions*/ true);
+        }
+        function getIndexTypeOfContextualType(type, kind) {
+            return mapType(type, function (t) { return getIndexTypeOfStructuredType(t, kind); }, /*noReductions*/ true);
+        }
+        // Return true if the given contextual type is a tuple-like type
+        function contextualTypeIsTupleLikeType(type) {
+            return !!(type.flags & 262144 /* Union */ ? ts.forEach(type.types, isTupleLikeType) : isTupleLikeType(type));
+        }
+        // In an object literal contextually typed by a type T, the contextual type of a property assignment is the type of
+        // the matching property in T, if one exists. Otherwise, it is the type of the numeric index signature in T, if one
+        // exists. Otherwise, it is the type of the string index signature in T, if one exists.
+        function getContextualTypeForObjectLiteralMethod(node) {
+            ts.Debug.assert(ts.isObjectLiteralMethod(node));
+            if (node.flags & 8388608 /* InWithStatement */) {
+                // We cannot answer semantic questions within a with block, do not proceed any further
+                return undefined;
+            }
+            return getContextualTypeForObjectLiteralElement(node);
+        }
+        function getContextualTypeForObjectLiteralElement(element) {
+            var objectLiteral = element.parent;
+            var type = getApparentTypeOfContextualType(objectLiteral);
+            if (type) {
+                if (!hasNonBindableDynamicName(element)) {
+                    // For a (non-symbol) computed property, there is no reason to look up the name
+                    // in the type. It will just be "__computed", which does not appear in any
+                    // SymbolTable.
+                    var symbolName_1 = getSymbolOfNode(element).escapedName;
+                    var propertyType = getTypeOfPropertyOfContextualType(type, symbolName_1);
+                    if (propertyType) {
+                        return propertyType;
+                    }
+                }
+                return isNumericName(element.name) && getIndexTypeOfContextualType(type, 1 /* Number */) ||
+                    getIndexTypeOfContextualType(type, 0 /* String */);
+            }
+            return undefined;
+        }
+        // In an array literal contextually typed by a type T, the contextual type of an element expression at index N is
+        // the type of the property with the numeric name N in T, if one exists. Otherwise, if T has a numeric index signature,
+        // it is the type of the numeric index signature in T. Otherwise, in ES6 and higher, the contextual type is the iterated
+        // type of T.
+        function getContextualTypeForElementExpression(arrayContextualType, index) {
+            return arrayContextualType && (getTypeOfPropertyOfContextualType(arrayContextualType, "" + index)
+                || getIndexTypeOfContextualType(arrayContextualType, 1 /* Number */)
+                || getIteratedTypeOrElementType(arrayContextualType, /*errorNode*/ undefined, /*allowStringInput*/ false, /*allowAsyncIterables*/ false, /*checkAssignability*/ false));
+        }
+        // In a contextually typed conditional expression, the true/false expressions are contextually typed by the same type.
+        function getContextualTypeForConditionalOperand(node) {
+            var conditional = node.parent;
+            return node === conditional.whenTrue || node === conditional.whenFalse ? getContextualType(conditional) : undefined;
+        }
+        function getContextualTypeForChildJsxExpression(node) {
+            var attributesType = getApparentTypeOfContextualType(node.openingElement.tagName);
+            // JSX expression is in children of JSX Element, we will look for an "children" atttribute (we get the name from JSX.ElementAttributesProperty)
+            var jsxChildrenPropertyName = getJsxElementChildrenPropertyName(getJsxNamespaceAt(node));
+            return attributesType && !isTypeAny(attributesType) && jsxChildrenPropertyName && jsxChildrenPropertyName !== "" ? getTypeOfPropertyOfContextualType(attributesType, jsxChildrenPropertyName) : undefined;
+        }
+        function getContextualTypeForJsxExpression(node) {
+            var exprParent = node.parent;
+            return ts.isJsxAttributeLike(exprParent)
+                ? getContextualType(node)
+                : ts.isJsxElement(exprParent)
+                    ? getContextualTypeForChildJsxExpression(exprParent)
+                    : undefined;
+        }
+        function getContextualTypeForJsxAttribute(attribute) {
+            // When we trying to resolve JsxOpeningLikeElement as a stateless function element, we will already give its attributes a contextual type
+            // which is a type of the parameter of the signature we are trying out.
+            // If there is no contextual type (e.g. we are trying to resolve stateful component), get attributes type from resolving element's tagName
+            if (ts.isJsxAttribute(attribute)) {
+                var attributesType = getApparentTypeOfContextualType(attribute.parent);
+                if (!attributesType || isTypeAny(attributesType)) {
+                    return undefined;
+                }
+                return getTypeOfPropertyOfContextualType(attributesType, attribute.name.escapedText);
+            }
+            else {
+                return getContextualType(attribute.parent);
+            }
+        }
+        // Return true if the given expression is possibly a discriminant value. We limit the kinds of
+        // expressions we check to those that don't depend on their contextual type in order not to cause
+        // recursive (and possibly infinite) invocations of getContextualType.
+        function isPossiblyDiscriminantValue(node) {
+            switch (node.kind) {
+                case 9 /* StringLiteral */:
+                case 8 /* NumericLiteral */:
+                case 13 /* NoSubstitutionTemplateLiteral */:
+                case 101 /* TrueKeyword */:
+                case 86 /* FalseKeyword */:
+                case 95 /* NullKeyword */:
+                case 71 /* Identifier */:
+                    return true;
+                case 185 /* PropertyAccessExpression */:
+                case 191 /* ParenthesizedExpression */:
+                    return isPossiblyDiscriminantValue(node.expression);
+            }
+            return false;
+        }
+        // Return the contextual type for a given expression node. During overload resolution, a contextual type may temporarily
+        // be "pushed" onto a node using the contextualType property.
+        function getApparentTypeOfContextualType(node) {
+            var contextualType = getContextualType(node);
+            contextualType = contextualType && mapType(contextualType, getApparentType);
+            if (!(contextualType && contextualType.flags & 262144 /* Union */ && ts.isObjectLiteralExpression(node))) {
+                return contextualType;
+            }
+            // Keep the below up-to-date with the work done within `isRelatedTo` by `findMatchingDiscriminantType`
+            var match;
+            propLoop: for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
+                var prop = _a[_i];
+                if (!prop.symbol)
+                    continue;
+                if (prop.kind !== 270 /* PropertyAssignment */)
+                    continue;
+                if (isPossiblyDiscriminantValue(prop.initializer) && isDiscriminantProperty(contextualType, prop.symbol.escapedName)) {
+                    var discriminatingType = checkExpression(prop.initializer);
+                    for (var _b = 0, _c = contextualType.types; _b < _c.length; _b++) {
+                        var type = _c[_b];
+                        var targetType = getTypeOfPropertyOfType(type, prop.symbol.escapedName);
+                        if (targetType && checkTypeAssignableTo(discriminatingType, targetType, /*errorNode*/ undefined)) {
+                            if (match) {
+                                if (type === match)
+                                    continue; // Finding multiple fields which discriminate to the same type is fine
+                                match = undefined;
+                                break propLoop;
+                            }
+                            match = type;
+                        }
+                    }
+                }
+            }
+            return match || contextualType;
+        }
+        /**
+         * Woah! Do you really want to use this function?
+         *
+         * Unless you're trying to get the *non-apparent* type for a
+         * value-literal type or you're authoring relevant portions of this algorithm,
+         * you probably meant to use 'getApparentTypeOfContextualType'.
+         * Otherwise this may not be very useful.
+         *
+         * In cases where you *are* working on this function, you should understand
+         * when it is appropriate to use 'getContextualType' and 'getApparentTypeOfContextualType'.
+         *
+         *   - Use 'getContextualType' when you are simply going to propagate the result to the expression.
+         *   - Use 'getApparentTypeOfContextualType' when you're going to need the members of the type.
+         *
+         * @param node the expression whose contextual type will be returned.
+         * @returns the contextual type of an expression.
+         */
+        function getContextualType(node) {
+            if (node.flags & 8388608 /* InWithStatement */) {
+                // We cannot answer semantic questions within a with block, do not proceed any further
+                return undefined;
+            }
+            if (node.contextualType) {
+                return node.contextualType;
+            }
+            var parent = node.parent;
+            switch (parent.kind) {
+                case 232 /* VariableDeclaration */:
+                case 149 /* Parameter */:
+                case 152 /* PropertyDeclaration */:
+                case 151 /* PropertySignature */:
+                case 182 /* BindingElement */:
+                    return getContextualTypeForInitializerExpression(node);
+                case 193 /* ArrowFunction */:
+                case 225 /* ReturnStatement */:
+                    return getContextualTypeForReturnExpression(node);
+                case 203 /* YieldExpression */:
+                    return getContextualTypeForYieldOperand(parent);
+                case 187 /* CallExpression */:
+                case 188 /* NewExpression */:
+                    return getContextualTypeForArgument(parent, node);
+                case 190 /* TypeAssertionExpression */:
+                case 208 /* AsExpression */:
+                    return getTypeFromTypeNode(parent.type);
+                case 200 /* BinaryExpression */:
+                    return getContextualTypeForBinaryOperand(node);
+                case 270 /* PropertyAssignment */:
+                case 271 /* ShorthandPropertyAssignment */:
+                    return getContextualTypeForObjectLiteralElement(parent);
+                case 272 /* SpreadAssignment */:
+                    return getApparentTypeOfContextualType(parent.parent);
+                case 183 /* ArrayLiteralExpression */: {
+                    var arrayLiteral = parent;
+                    var type = getApparentTypeOfContextualType(arrayLiteral);
+                    return getContextualTypeForElementExpression(type, ts.indexOfNode(arrayLiteral.elements, node));
+                }
+                case 201 /* ConditionalExpression */:
+                    return getContextualTypeForConditionalOperand(node);
+                case 211 /* TemplateSpan */:
+                    ts.Debug.assert(parent.parent.kind === 202 /* TemplateExpression */);
+                    return getContextualTypeForSubstitutionExpression(parent.parent, node);
+                case 191 /* ParenthesizedExpression */: {
+                    // Like in `checkParenthesizedExpression`, an `/** @type {xyz} */` comment before a parenthesized expression acts as a type cast.
+                    var tag = ts.isInJavaScriptFile(parent) ? ts.getJSDocTypeTag(parent) : undefined;
+                    return tag ? getTypeFromTypeNode(tag.typeExpression.type) : getContextualType(parent);
+                }
+                case 265 /* JsxExpression */:
+                    return getContextualTypeForJsxExpression(parent);
+                case 262 /* JsxAttribute */:
+                case 264 /* JsxSpreadAttribute */:
+                    return getContextualTypeForJsxAttribute(parent);
+                case 257 /* JsxOpeningElement */:
+                case 256 /* JsxSelfClosingElement */:
+                    return getContextualJsxElementAttributesType(parent);
+            }
+            return undefined;
+        }
+        function getContextualMapper(node) {
+            var ancestor = ts.findAncestor(node, function (n) { return !!n.contextualMapper; });
+            return ancestor ? ancestor.contextualMapper : identityMapper;
+        }
+        function getContextualJsxElementAttributesType(node) {
+            if (isJsxIntrinsicIdentifier(node.tagName)) {
+                return getIntrinsicAttributesTypeFromJsxOpeningLikeElement(node);
+            }
+            var valueType = checkExpression(node.tagName);
+            if (isTypeAny(valueType)) {
+                // Short-circuit if the class tag is using an element type 'any'
+                return anyType;
+            }
+            var isJs = ts.isInJavaScriptFile(node);
+            return mapType(valueType, function (t) { return getJsxSignaturesParameterTypes(t, isJs, node); });
+        }
+        function getJsxSignaturesParameterTypes(valueType, isJs, context) {
+            // If the elemType is a string type, we have to return anyType to prevent an error downstream as we will try to find construct or call signature of the type
+            if (valueType.flags & 4 /* String */) {
+                return anyType;
+            }
+            else if (valueType.flags & 64 /* StringLiteral */) {
+                // If the elemType is a stringLiteral type, we can then provide a check to make sure that the string literal type is one of the Jsx intrinsic element type
+                // For example:
+                //      var CustomTag: "h1" = "h1";
+                //      <CustomTag> Hello World </CustomTag>
+                var intrinsicElementsType = getJsxType(JsxNames.IntrinsicElements, context);
+                if (intrinsicElementsType !== errorType) {
+                    var stringLiteralTypeName = valueType.value;
+                    var intrinsicProp = getPropertyOfType(intrinsicElementsType, ts.escapeLeadingUnderscores(stringLiteralTypeName));
+                    if (intrinsicProp) {
+                        return getTypeOfSymbol(intrinsicProp);
+                    }
+                    var indexSignatureType = getIndexTypeOfType(intrinsicElementsType, 0 /* String */);
+                    if (indexSignatureType) {
+                        return indexSignatureType;
+                    }
+                }
+                return anyType;
+            }
+            // Resolve the signatures, preferring constructor
+            var signatures = getSignaturesOfType(valueType, 1 /* Construct */);
+            var ctor = true;
+            if (signatures.length === 0) {
+                // No construct signatures, try call signatures
+                signatures = getSignaturesOfType(valueType, 0 /* Call */);
+                ctor = false;
+                if (signatures.length === 0) {
+                    // We found no signatures at all, which is an error
+                    return errorType;
+                }
+            }
+            var links = getNodeLinks(context);
+            if (!links.resolvedSignatures) {
+                links.resolvedSignatures = ts.createMap();
+            }
+            var cacheKey = "" + getTypeId(valueType);
+            var cachedResolved = links.resolvedSignatures.get(cacheKey);
+            if (cachedResolved && cachedResolved !== resolvingSignaturesArray) {
+                signatures = cachedResolved;
+            }
+            else if (!cachedResolved) {
+                links.resolvedSignatures.set(cacheKey, resolvingSignaturesArray);
+                links.resolvedSignatures.set(cacheKey, signatures = instantiateJsxSignatures(context, signatures));
+            }
+            return getUnionType(ts.map(signatures, ctor ? function (t) { return getJsxPropsTypeFromClassType(t, isJs, context, /*reportErrors*/ false); } : function (t) { return getJsxPropsTypeFromCallSignature(t, context); }), 0 /* None */);
+        }
+        function getJsxPropsTypeFromCallSignature(sig, context) {
+            var propsType = getTypeOfFirstParameterOfSignatureWithFallback(sig, emptyObjectType);
+            var intrinsicAttribs = getJsxType(JsxNames.IntrinsicAttributes, context);
+            if (intrinsicAttribs !== errorType) {
+                propsType = intersectTypes(intrinsicAttribs, propsType);
+            }
+            return propsType;
+        }
+        function getJsxPropsTypeForSignatureFromMember(sig, forcedLookupLocation) {
+            var instanceType = getReturnTypeOfSignature(sig);
+            return isTypeAny(instanceType) ? instanceType : getTypeOfPropertyOfType(instanceType, forcedLookupLocation);
+        }
+        function getJsxPropsTypeFromClassType(sig, isJs, context, reportErrors) {
+            var forcedLookupLocation = getJsxElementPropertiesName(getJsxNamespaceAt(context));
+            var attributesType = forcedLookupLocation === undefined
+                // If there is no type ElementAttributesProperty, return the type of the first parameter of the signature, which should be the props type
+                ? getTypeOfFirstParameterOfSignatureWithFallback(sig, emptyObjectType)
+                : forcedLookupLocation === ""
+                    // If there is no e.g. 'props' member in ElementAttributesProperty, use the element class type instead
+                    ? getReturnTypeOfSignature(sig)
+                    // Otherwise get the type of the property on the signature return type
+                    : getJsxPropsTypeForSignatureFromMember(sig, forcedLookupLocation);
+            if (!attributesType) {
+                // There is no property named 'props' on this instance type
+                if (reportErrors && !!forcedLookupLocation && !!ts.length(context.attributes.properties)) {
+                    error(context, ts.Diagnostics.JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property, ts.unescapeLeadingUnderscores(forcedLookupLocation));
+                }
+                return emptyObjectType;
+            }
+            else if (isTypeAny(attributesType)) {
+                // Props is of type 'any' or unknown
+                return attributesType;
+            }
+            else {
+                // Normal case -- add in IntrinsicClassElements<T> and IntrinsicElements
+                var apparentAttributesType = attributesType;
+                var intrinsicClassAttribs = getJsxType(JsxNames.IntrinsicClassAttributes, context);
+                if (intrinsicClassAttribs !== errorType) {
+                    var typeParams = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(intrinsicClassAttribs.symbol);
+                    var hostClassType = getReturnTypeOfSignature(sig);
+                    apparentAttributesType = intersectTypes(typeParams
+                        ? createTypeReference(intrinsicClassAttribs, fillMissingTypeArguments([hostClassType], typeParams, getMinTypeArgumentCount(typeParams), isJs))
+                        : intrinsicClassAttribs, apparentAttributesType);
+                }
+                var intrinsicAttribs = getJsxType(JsxNames.IntrinsicAttributes, context);
+                if (intrinsicAttribs !== errorType) {
+                    apparentAttributesType = intersectTypes(intrinsicAttribs, apparentAttributesType);
+                }
+                return apparentAttributesType;
+            }
+        }
+        // If the given type is an object or union type with a single signature, and if that signature has at
+        // least as many parameters as the given function, return the signature. Otherwise return undefined.
+        function getContextualCallSignature(type, node) {
+            var signatures = getSignaturesOfType(type, 0 /* Call */);
+            if (signatures.length === 1) {
+                var signature = signatures[0];
+                if (!isAritySmaller(signature, node)) {
+                    return signature;
+                }
+            }
+        }
+        /** If the contextual signature has fewer parameters than the function expression, do not use it */
+        function isAritySmaller(signature, target) {
+            var targetParameterCount = 0;
+            for (; targetParameterCount < target.parameters.length; targetParameterCount++) {
+                var param = target.parameters[targetParameterCount];
+                if (param.initializer || param.questionToken || param.dotDotDotToken || isJSDocOptionalParameter(param)) {
+                    break;
+                }
+            }
+            if (target.parameters.length && ts.parameterIsThisKeyword(target.parameters[0])) {
+                targetParameterCount--;
+            }
+            var sourceLength = signature.hasRestParameter ? Number.MAX_VALUE : signature.parameters.length;
+            return sourceLength < targetParameterCount;
+        }
+        function isFunctionExpressionOrArrowFunction(node) {
+            return node.kind === 192 /* FunctionExpression */ || node.kind === 193 /* ArrowFunction */;
+        }
+        function getContextualSignatureForFunctionLikeDeclaration(node) {
+            // Only function expressions, arrow functions, and object literal methods are contextually typed.
+            return isFunctionExpressionOrArrowFunction(node) || ts.isObjectLiteralMethod(node)
+                ? getContextualSignature(node)
+                : undefined;
+        }
+        function getContextualTypeForFunctionLikeDeclaration(node) {
+            return ts.isObjectLiteralMethod(node) ?
+                getContextualTypeForObjectLiteralMethod(node) :
+                getApparentTypeOfContextualType(node);
+        }
+        // Return the contextual signature for a given expression node. A contextual type provides a
+        // contextual signature if it has a single call signature and if that call signature is non-generic.
+        // If the contextual type is a union type, get the signature from each type possible and if they are
+        // all identical ignoring their return type, the result is same signature but with return type as
+        // union type of return types from these signatures
+        function getContextualSignature(node) {
+            ts.Debug.assert(node.kind !== 154 /* MethodDeclaration */ || ts.isObjectLiteralMethod(node));
+            var type;
+            if (ts.isInJavaScriptFile(node)) {
+                var jsdoc = ts.getJSDocType(node);
+                if (jsdoc) {
+                    type = getTypeFromTypeNode(jsdoc);
+                }
+            }
+            if (!type) {
+                type = getContextualTypeForFunctionLikeDeclaration(node);
+            }
+            if (!type) {
+                return undefined;
+            }
+            if (!(type.flags & 262144 /* Union */)) {
+                return getContextualCallSignature(type, node);
+            }
+            var signatureList;
+            var types = type.types;
+            for (var _i = 0, types_15 = types; _i < types_15.length; _i++) {
+                var current = types_15[_i];
+                var signature = getContextualCallSignature(current, node);
+                if (signature) {
+                    if (!signatureList) {
+                        // This signature will contribute to contextual union signature
+                        signatureList = [signature];
+                    }
+                    else if (!compareSignaturesIdentical(signatureList[0], signature, /*partialMatch*/ false, /*ignoreThisTypes*/ true, /*ignoreReturnTypes*/ true, compareTypesIdentical)) {
+                        // Signatures aren't identical, do not use
+                        return undefined;
+                    }
+                    else {
+                        // Use this signature for contextual union signature
+                        signatureList.push(signature);
+                    }
+                }
+            }
+            // Result is union of signatures collected (return type is union of return types of this signature set)
+            var result;
+            if (signatureList) {
+                result = cloneSignature(signatureList[0]);
+                result.unionSignatures = signatureList;
+            }
+            return result;
+        }
+        function checkSpreadExpression(node, checkMode) {
+            if (languageVersion < 2 /* ES2015 */ && compilerOptions.downlevelIteration) {
+                checkExternalEmitHelpers(node, 1536 /* SpreadIncludes */);
+            }
+            var arrayOrIterableType = checkExpression(node.expression, checkMode);
+            return checkIteratedTypeOrElementType(arrayOrIterableType, node.expression, /*allowStringInput*/ false, /*allowAsyncIterables*/ false);
+        }
+        function hasDefaultValue(node) {
+            return (node.kind === 182 /* BindingElement */ && !!node.initializer) ||
+                (node.kind === 200 /* BinaryExpression */ && node.operatorToken.kind === 58 /* EqualsToken */);
+        }
+        function checkArrayLiteral(node, checkMode) {
+            var elements = node.elements;
+            var hasSpreadElement = false;
+            var elementTypes = [];
+            var inDestructuringPattern = ts.isAssignmentTarget(node);
+            var contextualType = getApparentTypeOfContextualType(node);
+            for (var index = 0; index < elements.length; index++) {
+                var e = elements[index];
+                if (inDestructuringPattern && e.kind === 204 /* SpreadElement */) {
+                    // Given the following situation:
+                    //    var c: {};
+                    //    [...c] = ["", 0];
+                    //
+                    // c is represented in the tree as a spread element in an array literal.
+                    // But c really functions as a rest element, and its purpose is to provide
+                    // a contextual type for the right hand side of the assignment. Therefore,
+                    // instead of calling checkExpression on "...c", which will give an error
+                    // if c is not iterable/array-like, we need to act as if we are trying to
+                    // get the contextual element type from it. So we do something similar to
+                    // getContextualTypeForElementExpression, which will crucially not error
+                    // if there is no index type / iterated type.
+                    var restArrayType = checkExpression(e.expression, checkMode);
+                    var restElementType = getIndexTypeOfType(restArrayType, 1 /* Number */) ||
+                        getIteratedTypeOrElementType(restArrayType, /*errorNode*/ undefined, /*allowStringInput*/ false, /*allowAsyncIterables*/ false, /*checkAssignability*/ false);
+                    if (restElementType) {
+                        elementTypes.push(restElementType);
+                    }
+                }
+                else {
+                    var elementContextualType = getContextualTypeForElementExpression(contextualType, index);
+                    var type = checkExpressionForMutableLocation(e, checkMode, elementContextualType);
+                    elementTypes.push(type);
+                }
+                hasSpreadElement = hasSpreadElement || e.kind === 204 /* SpreadElement */;
+            }
+            if (!hasSpreadElement) {
+                // If array literal is actually a destructuring pattern, mark it as an implied type. We do this such
+                // that we get the same behavior for "var [x, y] = []" and "[x, y] = []".
+                if (inDestructuringPattern && elementTypes.length) {
+                    var type = cloneTypeReference(createTupleType(elementTypes));
+                    type.pattern = node;
+                    return type;
+                }
+                if (contextualType && contextualTypeIsTupleLikeType(contextualType)) {
+                    var pattern = contextualType.pattern;
+                    // If array literal is contextually typed by a binding pattern or an assignment pattern, pad the resulting
+                    // tuple type with the corresponding binding or assignment element types to make the lengths equal.
+                    if (pattern && (pattern.kind === 181 /* ArrayBindingPattern */ || pattern.kind === 183 /* ArrayLiteralExpression */)) {
+                        var patternElements = pattern.elements;
+                        for (var i = elementTypes.length; i < patternElements.length; i++) {
+                            var patternElement = patternElements[i];
+                            if (hasDefaultValue(patternElement)) {
+                                elementTypes.push(contextualType.typeArguments[i]);
+                            }
+                            else {
+                                if (patternElement.kind !== 206 /* OmittedExpression */) {
+                                    error(patternElement, ts.Diagnostics.Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value);
+                                }
+                                elementTypes.push(strictNullChecks ? implicitNeverType : undefinedWideningType);
+                            }
+                        }
+                    }
+                    if (elementTypes.length) {
+                        return createTupleType(elementTypes);
+                    }
+                }
+            }
+            return createArrayType(elementTypes.length ?
+                getUnionType(elementTypes, 2 /* Subtype */) :
+                strictNullChecks ? implicitNeverType : undefinedWideningType);
+        }
+        function isNumericName(name) {
+            switch (name.kind) {
+                case 147 /* ComputedPropertyName */:
+                    return isNumericComputedName(name);
+                case 71 /* Identifier */:
+                    return isNumericLiteralName(name.escapedText);
+                case 8 /* NumericLiteral */:
+                case 9 /* StringLiteral */:
+                    return isNumericLiteralName(name.text);
+                default:
+                    return false;
+            }
+        }
+        function isNumericComputedName(name) {
+            // It seems odd to consider an expression of type Any to result in a numeric name,
+            // but this behavior is consistent with checkIndexedAccess
+            return isTypeAssignableToKind(checkComputedPropertyName(name), 168 /* NumberLike */);
+        }
+        function isInfinityOrNaNString(name) {
+            return name === "Infinity" || name === "-Infinity" || name === "NaN";
+        }
+        function isNumericLiteralName(name) {
+            // The intent of numeric names is that
+            //     - they are names with text in a numeric form, and that
+            //     - setting properties/indexing with them is always equivalent to doing so with the numeric literal 'numLit',
+            //         acquired by applying the abstract 'ToNumber' operation on the name's text.
+            //
+            // The subtlety is in the latter portion, as we cannot reliably say that anything that looks like a numeric literal is a numeric name.
+            // In fact, it is the case that the text of the name must be equal to 'ToString(numLit)' for this to hold.
+            //
+            // Consider the property name '"0xF00D"'. When one indexes with '0xF00D', they are actually indexing with the value of 'ToString(0xF00D)'
+            // according to the ECMAScript specification, so it is actually as if the user indexed with the string '"61453"'.
+            // Thus, the text of all numeric literals equivalent to '61543' such as '0xF00D', '0xf00D', '0170015', etc. are not valid numeric names
+            // because their 'ToString' representation is not equal to their original text.
+            // This is motivated by ECMA-262 sections 9.3.1, 9.8.1, 11.1.5, and 11.2.1.
+            //
+            // Here, we test whether 'ToString(ToNumber(name))' is exactly equal to 'name'.
+            // The '+' prefix operator is equivalent here to applying the abstract ToNumber operation.
+            // Applying the 'toString()' method on a number gives us the abstract ToString operation on a number.
+            //
+            // Note that this accepts the values 'Infinity', '-Infinity', and 'NaN', and that this is intentional.
+            // This is desired behavior, because when indexing with them as numeric entities, you are indexing
+            // with the strings '"Infinity"', '"-Infinity"', and '"NaN"' respectively.
+            return (+name).toString() === name;
+        }
+        function checkComputedPropertyName(node) {
+            var links = getNodeLinks(node.expression);
+            if (!links.resolvedType) {
+                links.resolvedType = checkExpression(node.expression);
+                // This will allow types number, string, symbol or any. It will also allow enums, the unknown
+                // type, and any union of these types (like string | number).
+                if (links.resolvedType.flags & 24576 /* Nullable */ ||
+                    !isTypeAssignableToKind(links.resolvedType, 68 /* StringLike */ | 168 /* NumberLike */ | 3072 /* ESSymbolLike */) &&
+                        !isTypeAssignableTo(links.resolvedType, stringNumberSymbolType)) {
+                    error(node, ts.Diagnostics.A_computed_property_name_must_be_of_type_string_number_symbol_or_any);
+                }
+                else {
+                    checkThatExpressionIsProperSymbolReference(node.expression, links.resolvedType, /*reportError*/ true);
+                }
+            }
+            return links.resolvedType;
+        }
+        function getObjectLiteralIndexInfo(propertyNodes, offset, properties, kind) {
+            var propTypes = [];
+            for (var i = 0; i < properties.length; i++) {
+                if (kind === 0 /* String */ || isNumericName(propertyNodes[i + offset].name)) {
+                    propTypes.push(getTypeOfSymbol(properties[i]));
+                }
+            }
+            var unionType = propTypes.length ? getUnionType(propTypes, 2 /* Subtype */) : undefinedType;
+            return createIndexInfo(unionType, /*isReadonly*/ false);
+        }
+        function checkObjectLiteral(node, checkMode) {
+            var inDestructuringPattern = ts.isAssignmentTarget(node);
+            // Grammar checking
+            checkGrammarObjectLiteralExpression(node, inDestructuringPattern);
+            var propertiesTable;
+            var propertiesArray = [];
+            var spread = emptyObjectType;
+            var propagatedFlags = 33554432 /* FreshLiteral */;
+            var contextualType = getApparentTypeOfContextualType(node);
+            var contextualTypeHasPattern = contextualType && contextualType.pattern &&
+                (contextualType.pattern.kind === 180 /* ObjectBindingPattern */ || contextualType.pattern.kind === 184 /* ObjectLiteralExpression */);
+            var isInJSFile = ts.isInJavaScriptFile(node) && !ts.isInJsonFile(node);
+            var isJSObjectLiteral = !contextualType && isInJSFile;
+            var typeFlags = 0;
+            var patternWithComputedProperties = false;
+            var hasComputedStringProperty = false;
+            var hasComputedNumberProperty = false;
+            if (isInJSFile) {
+                var decl = ts.getDeclarationOfJSInitializer(node);
+                if (decl) {
+                    // a JS object literal whose declaration's symbol has exports is a JS namespace
+                    var symbol = getSymbolOfNode(decl);
+                    if (symbol && ts.hasEntries(symbol.exports)) {
+                        propertiesTable = symbol.exports;
+                        symbol.exports.forEach(function (s) { return propertiesArray.push(getMergedSymbol(s)); });
+                        return createObjectLiteralType();
+                    }
+                }
+            }
+            propertiesTable = ts.createSymbolTable();
+            var offset = 0;
+            for (var i = 0; i < node.properties.length; i++) {
+                var memberDecl = node.properties[i];
+                var member = getSymbolOfNode(memberDecl);
+                var computedNameType = memberDecl.name && memberDecl.name.kind === 147 /* ComputedPropertyName */ && !ts.isWellKnownSymbolSyntactically(memberDecl.name.expression) ?
+                    checkComputedPropertyName(memberDecl.name) : undefined;
+                if (memberDecl.kind === 270 /* PropertyAssignment */ ||
+                    memberDecl.kind === 271 /* ShorthandPropertyAssignment */ ||
+                    ts.isObjectLiteralMethod(memberDecl)) {
+                    var type = memberDecl.kind === 270 /* PropertyAssignment */ ? checkPropertyAssignment(memberDecl, checkMode) :
+                        memberDecl.kind === 271 /* ShorthandPropertyAssignment */ ? checkExpressionForMutableLocation(memberDecl.name, checkMode) :
+                            checkObjectLiteralMethod(memberDecl, checkMode);
+                    if (isInJSFile) {
+                        var jsDocType = getTypeForDeclarationFromJSDocComment(memberDecl);
+                        if (jsDocType) {
+                            checkTypeAssignableTo(type, jsDocType, memberDecl);
+                            type = jsDocType;
+                        }
+                    }
+                    typeFlags |= type.flags;
+                    var nameType = computedNameType && computedNameType.flags & 2240 /* StringOrNumberLiteralOrUnique */ ?
+                        computedNameType : undefined;
+                    var prop = nameType ?
+                        createSymbol(4 /* Property */ | member.flags, getLateBoundNameFromType(nameType), 1024 /* Late */) :
+                        createSymbol(4 /* Property */ | member.flags, member.escapedName);
+                    if (nameType) {
+                        prop.nameType = nameType;
+                    }
+                    if (inDestructuringPattern) {
+                        // If object literal is an assignment pattern and if the assignment pattern specifies a default value
+                        // for the property, make the property optional.
+                        var isOptional = (memberDecl.kind === 270 /* PropertyAssignment */ && hasDefaultValue(memberDecl.initializer)) ||
+                            (memberDecl.kind === 271 /* ShorthandPropertyAssignment */ && memberDecl.objectAssignmentInitializer);
+                        if (isOptional) {
+                            prop.flags |= 16777216 /* Optional */;
+                        }
+                    }
+                    else if (contextualTypeHasPattern && !(ts.getObjectFlags(contextualType) & 512 /* ObjectLiteralPatternWithComputedProperties */)) {
+                        // If object literal is contextually typed by the implied type of a binding pattern, and if the
+                        // binding pattern specifies a default value for the property, make the property optional.
+                        var impliedProp = getPropertyOfType(contextualType, member.escapedName);
+                        if (impliedProp) {
+                            prop.flags |= impliedProp.flags & 16777216 /* Optional */;
+                        }
+                        else if (!compilerOptions.suppressExcessPropertyErrors && !getIndexInfoOfType(contextualType, 0 /* String */)) {
+                            error(memberDecl.name, ts.Diagnostics.Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1, symbolToString(member), typeToString(contextualType));
+                        }
+                    }
+                    prop.declarations = member.declarations;
+                    prop.parent = member.parent;
+                    if (member.valueDeclaration) {
+                        prop.valueDeclaration = member.valueDeclaration;
+                    }
+                    prop.type = type;
+                    prop.target = member;
+                    member = prop;
+                }
+                else if (memberDecl.kind === 272 /* SpreadAssignment */) {
+                    if (languageVersion < 2 /* ES2015 */) {
+                        checkExternalEmitHelpers(memberDecl, 2 /* Assign */);
+                    }
+                    if (propertiesArray.length > 0) {
+                        spread = getSpreadType(spread, createObjectLiteralType(), node.symbol, propagatedFlags, /*objectFlags*/ 0);
+                        propertiesArray = [];
+                        propertiesTable = ts.createSymbolTable();
+                        hasComputedStringProperty = false;
+                        hasComputedNumberProperty = false;
+                        typeFlags = 0;
+                    }
+                    var type = checkExpression(memberDecl.expression);
+                    if (!isValidSpreadType(type)) {
+                        error(memberDecl, ts.Diagnostics.Spread_types_may_only_be_created_from_object_types);
+                        return errorType;
+                    }
+                    spread = getSpreadType(spread, type, node.symbol, propagatedFlags, /*objectFlags*/ 0);
+                    offset = i + 1;
+                    continue;
+                }
+                else {
+                    // TypeScript 1.0 spec (April 2014)
+                    // A get accessor declaration is processed in the same manner as
+                    // an ordinary function declaration(section 6.1) with no parameters.
+                    // A set accessor declaration is processed in the same manner
+                    // as an ordinary function declaration with a single parameter and a Void return type.
+                    ts.Debug.assert(memberDecl.kind === 156 /* GetAccessor */ || memberDecl.kind === 157 /* SetAccessor */);
+                    checkNodeDeferred(memberDecl);
+                }
+                if (computedNameType && !(computedNameType.flags & 2240 /* StringOrNumberLiteralOrUnique */)) {
+                    if (isTypeAssignableTo(computedNameType, stringNumberSymbolType)) {
+                        if (isTypeAssignableTo(computedNameType, numberType)) {
+                            hasComputedNumberProperty = true;
+                        }
+                        else {
+                            hasComputedStringProperty = true;
+                        }
+                        if (inDestructuringPattern) {
+                            patternWithComputedProperties = true;
+                        }
+                    }
+                }
+                else {
+                    propertiesTable.set(member.escapedName, member);
+                }
+                propertiesArray.push(member);
+            }
+            // If object literal is contextually typed by the implied type of a binding pattern, augment the result
+            // type with those properties for which the binding pattern specifies a default value.
+            if (contextualTypeHasPattern) {
+                for (var _i = 0, _a = getPropertiesOfType(contextualType); _i < _a.length; _i++) {
+                    var prop = _a[_i];
+                    if (!propertiesTable.get(prop.escapedName) && !(spread && getPropertyOfType(spread, prop.escapedName))) {
+                        if (!(prop.flags & 16777216 /* Optional */)) {
+                            error(prop.valueDeclaration || prop.bindingElement, ts.Diagnostics.Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value);
+                        }
+                        propertiesTable.set(prop.escapedName, prop);
+                        propertiesArray.push(prop);
+                    }
+                }
+            }
+            if (spread !== emptyObjectType) {
+                if (propertiesArray.length > 0) {
+                    spread = getSpreadType(spread, createObjectLiteralType(), node.symbol, propagatedFlags, /*objectFlags*/ 0);
+                }
+                return spread;
+            }
+            return createObjectLiteralType();
+            function createObjectLiteralType() {
+                var stringIndexInfo = isJSObjectLiteral ? jsObjectLiteralIndexInfo : hasComputedStringProperty ? getObjectLiteralIndexInfo(node.properties, offset, propertiesArray, 0 /* String */) : undefined;
+                var numberIndexInfo = hasComputedNumberProperty && !isJSObjectLiteral ? getObjectLiteralIndexInfo(node.properties, offset, propertiesArray, 1 /* Number */) : undefined;
+                var result = createAnonymousType(node.symbol, propertiesTable, ts.emptyArray, ts.emptyArray, stringIndexInfo, numberIndexInfo);
+                var freshObjectLiteralFlag = compilerOptions.suppressExcessPropertyErrors ? 0 : 33554432 /* FreshLiteral */;
+                result.flags |= 268435456 /* ContainsObjectLiteral */ | freshObjectLiteralFlag | (typeFlags & 939524096 /* PropagatingFlags */);
+                result.objectFlags |= 128 /* ObjectLiteral */;
+                if (patternWithComputedProperties) {
+                    result.objectFlags |= 512 /* ObjectLiteralPatternWithComputedProperties */;
+                }
+                if (inDestructuringPattern) {
+                    result.pattern = node;
+                }
+                if (!(result.flags & 24576 /* Nullable */)) {
+                    propagatedFlags |= (result.flags & 939524096 /* PropagatingFlags */);
+                }
+                return result;
+            }
+        }
+        function isValidSpreadType(type) {
+            return !!(type.flags & (3 /* AnyOrUnknown */ | 16777216 /* NonPrimitive */) ||
+                getFalsyFlags(type) & 29120 /* DefinitelyFalsy */ && isValidSpreadType(removeDefinitelyFalsyTypes(type)) ||
+                type.flags & 131072 /* Object */ && !isGenericMappedType(type) ||
+                type.flags & 786432 /* UnionOrIntersection */ && ts.every(type.types, isValidSpreadType));
+        }
+        function checkJsxSelfClosingElement(node, checkMode) {
+            checkJsxOpeningLikeElementOrOpeningFragment(node, checkMode);
+            return getJsxElementTypeAt(node) || anyType;
+        }
+        function checkJsxElement(node, checkMode) {
+            // Check attributes
+            checkJsxOpeningLikeElementOrOpeningFragment(node.openingElement, checkMode);
+            // Perform resolution on the closing tag so that rename/go to definition/etc work
+            if (isJsxIntrinsicIdentifier(node.closingElement.tagName)) {
+                getIntrinsicTagSymbol(node.closingElement);
+            }
+            else {
+                checkExpression(node.closingElement.tagName);
+            }
+            return getJsxElementTypeAt(node) || anyType;
+        }
+        function checkJsxFragment(node, checkMode) {
+            checkJsxOpeningLikeElementOrOpeningFragment(node.openingFragment, checkMode);
+            if (compilerOptions.jsx === 2 /* React */ && (compilerOptions.jsxFactory || ts.getSourceFileOfNode(node).pragmas.has("jsx"))) {
+                error(node, compilerOptions.jsxFactory
+                    ? ts.Diagnostics.JSX_fragment_is_not_supported_when_using_jsxFactory
+                    : ts.Diagnostics.JSX_fragment_is_not_supported_when_using_an_inline_JSX_factory_pragma);
+            }
+            return getJsxElementTypeAt(node) || anyType;
+        }
+        /**
+         * Returns true iff the JSX element name would be a valid JS identifier, ignoring restrictions about keywords not being identifiers
+         */
+        function isUnhyphenatedJsxName(name) {
+            // - is the only character supported in JSX attribute names that isn't valid in JavaScript identifiers
+            return !ts.stringContains(name, "-");
+        }
+        /**
+         * Returns true iff React would emit this tag name as a string rather than an identifier or qualified name
+         */
+        function isJsxIntrinsicIdentifier(tagName) {
+            // TODO (yuisu): comment
+            switch (tagName.kind) {
+                case 185 /* PropertyAccessExpression */:
+                case 99 /* ThisKeyword */:
+                    return false;
+                case 71 /* Identifier */:
+                    return ts.isIntrinsicJsxName(tagName.escapedText);
+                default:
+                    return ts.Debug.fail();
+            }
+        }
+        function checkJsxAttribute(node, checkMode) {
+            return node.initializer
+                ? checkExpressionForMutableLocation(node.initializer, checkMode)
+                : trueType; // <Elem attr /> is sugar for <Elem attr={true} />
+        }
+        /**
+         * Get attributes type of the JSX opening-like element. The result is from resolving "attributes" property of the opening-like element.
+         *
+         * @param openingLikeElement a JSX opening-like element
+         * @param filter a function to remove attributes that will not participate in checking whether attributes are assignable
+         * @return an anonymous type (similar to the one returned by checkObjectLiteral) in which its properties are attributes property.
+         * @remarks Because this function calls getSpreadType, it needs to use the same checks as checkObjectLiteral,
+         * which also calls getSpreadType.
+         */
+        function createJsxAttributesTypeFromAttributesProperty(openingLikeElement, checkMode) {
+            var attributes = openingLikeElement.attributes;
+            var attributesTable = ts.createSymbolTable();
+            var spread = emptyObjectType;
+            var hasSpreadAnyType = false;
+            var typeToIntersect;
+            var explicitlySpecifyChildrenAttribute = false;
+            var jsxChildrenPropertyName = getJsxElementChildrenPropertyName(getJsxNamespaceAt(openingLikeElement));
+            for (var _i = 0, _a = attributes.properties; _i < _a.length; _i++) {
+                var attributeDecl = _a[_i];
+                var member = attributeDecl.symbol;
+                if (ts.isJsxAttribute(attributeDecl)) {
+                    var exprType = checkJsxAttribute(attributeDecl, checkMode);
+                    var attributeSymbol = createSymbol(4 /* Property */ | 33554432 /* Transient */ | member.flags, member.escapedName);
+                    attributeSymbol.declarations = member.declarations;
+                    attributeSymbol.parent = member.parent;
+                    if (member.valueDeclaration) {
+                        attributeSymbol.valueDeclaration = member.valueDeclaration;
+                    }
+                    attributeSymbol.type = exprType;
+                    attributeSymbol.target = member;
+                    attributesTable.set(attributeSymbol.escapedName, attributeSymbol);
+                    if (attributeDecl.name.escapedText === jsxChildrenPropertyName) {
+                        explicitlySpecifyChildrenAttribute = true;
+                    }
+                }
+                else {
+                    ts.Debug.assert(attributeDecl.kind === 264 /* JsxSpreadAttribute */);
+                    if (attributesTable.size > 0) {
+                        spread = getSpreadType(spread, createJsxAttributesType(), attributes.symbol, /*typeFlags*/ 0, 4096 /* JsxAttributes */);
+                        attributesTable = ts.createSymbolTable();
+                    }
+                    var exprType = checkExpressionCached(attributeDecl.expression, checkMode);
+                    if (isTypeAny(exprType)) {
+                        hasSpreadAnyType = true;
+                    }
+                    if (isValidSpreadType(exprType)) {
+                        spread = getSpreadType(spread, exprType, openingLikeElement.symbol, /*typeFlags*/ 0, 4096 /* JsxAttributes */);
+                    }
+                    else {
+                        typeToIntersect = typeToIntersect ? getIntersectionType([typeToIntersect, exprType]) : exprType;
+                    }
+                }
+            }
+            if (!hasSpreadAnyType) {
+                if (attributesTable.size > 0) {
+                    spread = getSpreadType(spread, createJsxAttributesType(), attributes.symbol, /*typeFlags*/ 0, 4096 /* JsxAttributes */);
+                }
+            }
+            // Handle children attribute
+            var parent = openingLikeElement.parent.kind === 255 /* JsxElement */ ? openingLikeElement.parent : undefined;
+            // We have to check that openingElement of the parent is the one we are visiting as this may not be true for selfClosingElement
+            if (parent && parent.openingElement === openingLikeElement && parent.children.length > 0) {
+                var childrenTypes = checkJsxChildren(parent, checkMode);
+                if (!hasSpreadAnyType && jsxChildrenPropertyName && jsxChildrenPropertyName !== "") {
+                    // Error if there is a attribute named "children" explicitly specified and children element.
+                    // This is because children element will overwrite the value from attributes.
+                    // Note: we will not warn "children" attribute overwritten if "children" attribute is specified in object spread.
+                    if (explicitlySpecifyChildrenAttribute) {
+                        error(attributes, ts.Diagnostics._0_are_specified_twice_The_attribute_named_0_will_be_overwritten, ts.unescapeLeadingUnderscores(jsxChildrenPropertyName));
+                    }
+                    // If there are children in the body of JSX element, create dummy attribute "children" with the union of children types so that it will pass the attribute checking process
+                    var childrenPropSymbol = createSymbol(4 /* Property */ | 33554432 /* Transient */, jsxChildrenPropertyName);
+                    childrenPropSymbol.type = childrenTypes.length === 1 ?
+                        childrenTypes[0] :
+                        createArrayType(getUnionType(childrenTypes));
+                    var childPropMap = ts.createSymbolTable();
+                    childPropMap.set(jsxChildrenPropertyName, childrenPropSymbol);
+                    spread = getSpreadType(spread, createAnonymousType(attributes.symbol, childPropMap, ts.emptyArray, ts.emptyArray, /*stringIndexInfo*/ undefined, /*numberIndexInfo*/ undefined), attributes.symbol, /*typeFlags*/ 0, 4096 /* JsxAttributes */);
+                }
+            }
+            if (hasSpreadAnyType) {
+                return anyType;
+            }
+            if (typeToIntersect && spread !== emptyObjectType) {
+                return getIntersectionType([typeToIntersect, spread]);
+            }
+            return typeToIntersect || (spread === emptyObjectType ? createJsxAttributesType() : spread);
+            /**
+             * Create anonymous type from given attributes symbol table.
+             * @param symbol a symbol of JsxAttributes containing attributes corresponding to attributesTable
+             * @param attributesTable a symbol table of attributes property
+             */
+            function createJsxAttributesType() {
+                var result = createAnonymousType(attributes.symbol, attributesTable, ts.emptyArray, ts.emptyArray, /*stringIndexInfo*/ undefined, /*numberIndexInfo*/ undefined);
+                result.flags |= 268435456 /* ContainsObjectLiteral */;
+                result.objectFlags |= 128 /* ObjectLiteral */ | 4096 /* JsxAttributes */;
+                return result;
+            }
+        }
+        function checkJsxChildren(node, checkMode) {
+            var childrenTypes = [];
+            for (var _i = 0, _a = node.children; _i < _a.length; _i++) {
+                var child = _a[_i];
+                // In React, JSX text that contains only whitespaces will be ignored so we don't want to type-check that
+                // because then type of children property will have constituent of string type.
+                if (child.kind === 10 /* JsxText */) {
+                    if (!child.containsOnlyWhiteSpaces) {
+                        childrenTypes.push(stringType);
+                    }
+                }
+                else {
+                    childrenTypes.push(checkExpressionForMutableLocation(child, checkMode));
+                }
+            }
+            return childrenTypes;
+        }
+        /**
+         * Check attributes property of opening-like element. This function is called during chooseOverload to get call signature of a JSX opening-like element.
+         * (See "checkApplicableSignatureForJsxOpeningLikeElement" for how the function is used)
+         * @param node a JSXAttributes to be resolved of its type
+         */
+        function checkJsxAttributes(node, checkMode) {
+            return createJsxAttributesTypeFromAttributesProperty(node.parent, checkMode);
+        }
+        function getJsxType(name, location) {
+            var namespace = getJsxNamespaceAt(location);
+            var exports = namespace && getExportsOfSymbol(namespace);
+            var typeSymbol = exports && getSymbol(exports, name, 67901928 /* Type */);
+            return typeSymbol ? getDeclaredTypeOfSymbol(typeSymbol) : errorType;
+        }
+        /**
+         * Looks up an intrinsic tag name and returns a symbol that either points to an intrinsic
+         * property (in which case nodeLinks.jsxFlags will be IntrinsicNamedElement) or an intrinsic
+         * string index signature (in which case nodeLinks.jsxFlags will be IntrinsicIndexedElement).
+         * May also return unknownSymbol if both of these lookups fail.
+         */
+        function getIntrinsicTagSymbol(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedSymbol) {
+                var intrinsicElementsType = getJsxType(JsxNames.IntrinsicElements, node);
+                if (intrinsicElementsType !== errorType) {
+                    // Property case
+                    if (!ts.isIdentifier(node.tagName))
+                        return ts.Debug.fail();
+                    var intrinsicProp = getPropertyOfType(intrinsicElementsType, node.tagName.escapedText);
+                    if (intrinsicProp) {
+                        links.jsxFlags |= 1 /* IntrinsicNamedElement */;
+                        return links.resolvedSymbol = intrinsicProp;
+                    }
+                    // Intrinsic string indexer case
+                    var indexSignatureType = getIndexTypeOfType(intrinsicElementsType, 0 /* String */);
+                    if (indexSignatureType) {
+                        links.jsxFlags |= 2 /* IntrinsicIndexedElement */;
+                        return links.resolvedSymbol = intrinsicElementsType.symbol;
+                    }
+                    // Wasn't found
+                    error(node, ts.Diagnostics.Property_0_does_not_exist_on_type_1, ts.idText(node.tagName), "JSX." + JsxNames.IntrinsicElements);
+                    return links.resolvedSymbol = unknownSymbol;
+                }
+                else {
+                    if (noImplicitAny) {
+                        error(node, ts.Diagnostics.JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists, ts.unescapeLeadingUnderscores(JsxNames.IntrinsicElements));
+                    }
+                    return links.resolvedSymbol = unknownSymbol;
+                }
+            }
+            return links.resolvedSymbol;
+        }
+        function instantiateJsxSignatures(node, signatures) {
+            var instantiatedSignatures = [];
+            var candidateForTypeArgumentError;
+            var hasTypeArgumentError = !!node.typeArguments;
+            for (var _i = 0, signatures_3 = signatures; _i < signatures_3.length; _i++) {
+                var signature = signatures_3[_i];
+                if (signature.typeParameters) {
+                    var isJavascript = ts.isInJavaScriptFile(node);
+                    var typeArgumentInstantiated = getJsxSignatureTypeArgumentInstantiation(signature, node, isJavascript, /*reportErrors*/ false);
+                    if (typeArgumentInstantiated) {
+                        hasTypeArgumentError = false;
+                        instantiatedSignatures.push(typeArgumentInstantiated);
+                    }
+                    else {
+                        if (node.typeArguments && hasCorrectTypeArgumentArity(signature, node.typeArguments)) {
+                            candidateForTypeArgumentError = signature;
+                        }
+                        var inferenceContext = createInferenceContext(signature.typeParameters, signature, /*flags*/ isJavascript ? 4 /* AnyDefault */ : 0 /* None */);
+                        var typeArguments = inferJsxTypeArguments(signature, node, inferenceContext);
+                        instantiatedSignatures.push(getSignatureInstantiation(signature, typeArguments, isJavascript));
+                    }
+                }
+                else {
+                    instantiatedSignatures.push(signature);
+                }
+            }
+            if (node.typeArguments && hasTypeArgumentError) {
+                if (candidateForTypeArgumentError) {
+                    checkTypeArguments(candidateForTypeArgumentError, node.typeArguments, /*reportErrors*/ true);
+                }
+                // Length check to avoid issuing an arity error on length=0, the "Type argument list cannot be empty" grammar error alone is fine
+                else if (node.typeArguments.length !== 0) {
+                    diagnostics.add(getTypeArgumentArityError(node, signatures, node.typeArguments));
+                }
+            }
+            return instantiatedSignatures;
+        }
+        function getJsxSignatureTypeArgumentInstantiation(signature, node, isJavascript, reportErrors) {
+            if (reportErrors === void 0) { reportErrors = false; }
+            if (!node.typeArguments) {
+                return;
+            }
+            if (!hasCorrectTypeArgumentArity(signature, node.typeArguments)) {
+                return;
+            }
+            var args = checkTypeArguments(signature, node.typeArguments, reportErrors);
+            if (!args) {
+                return;
+            }
+            return getSignatureInstantiation(signature, args, isJavascript);
+        }
+        function getJsxNamespaceAt(location) {
+            var namespaceName = getJsxNamespace(location);
+            var resolvedNamespace = resolveName(location, namespaceName, 1920 /* Namespace */, /*diagnosticMessage*/ undefined, namespaceName, /*isUse*/ false);
+            if (resolvedNamespace) {
+                var candidate = getSymbol(getExportsOfSymbol(resolveSymbol(resolvedNamespace)), JsxNames.JSX, 1920 /* Namespace */);
+                if (candidate) {
+                    return candidate;
+                }
+            }
+            // JSX global fallback
+            return getGlobalSymbol(JsxNames.JSX, 1920 /* Namespace */, /*diagnosticMessage*/ undefined); // TODO: GH#18217
+        }
+        /**
+         * Look into JSX namespace and then look for container with matching name as nameOfAttribPropContainer.
+         * Get a single property from that container if existed. Report an error if there are more than one property.
+         *
+         * @param nameOfAttribPropContainer a string of value JsxNames.ElementAttributesPropertyNameContainer or JsxNames.ElementChildrenAttributeNameContainer
+         *          if other string is given or the container doesn't exist, return undefined.
+         */
+        function getNameFromJsxElementAttributesContainer(nameOfAttribPropContainer, jsxNamespace) {
+            // JSX.ElementAttributesProperty | JSX.ElementChildrenAttribute [symbol]
+            var jsxElementAttribPropInterfaceSym = jsxNamespace && getSymbol(jsxNamespace.exports, nameOfAttribPropContainer, 67901928 /* Type */);
+            // JSX.ElementAttributesProperty | JSX.ElementChildrenAttribute [type]
+            var jsxElementAttribPropInterfaceType = jsxElementAttribPropInterfaceSym && getDeclaredTypeOfSymbol(jsxElementAttribPropInterfaceSym);
+            // The properties of JSX.ElementAttributesProperty | JSX.ElementChildrenAttribute
+            var propertiesOfJsxElementAttribPropInterface = jsxElementAttribPropInterfaceType && getPropertiesOfType(jsxElementAttribPropInterfaceType);
+            if (propertiesOfJsxElementAttribPropInterface) {
+                // Element Attributes has zero properties, so the element attributes type will be the class instance type
+                if (propertiesOfJsxElementAttribPropInterface.length === 0) {
+                    return "";
+                }
+                // Element Attributes has one property, so the element attributes type will be the type of the corresponding
+                // property of the class instance type
+                else if (propertiesOfJsxElementAttribPropInterface.length === 1) {
+                    return propertiesOfJsxElementAttribPropInterface[0].escapedName;
+                }
+                else if (propertiesOfJsxElementAttribPropInterface.length > 1) {
+                    // More than one property on ElementAttributesProperty is an error
+                    error(jsxElementAttribPropInterfaceSym.declarations[0], ts.Diagnostics.The_global_type_JSX_0_may_not_have_more_than_one_property, ts.unescapeLeadingUnderscores(nameOfAttribPropContainer));
+                }
+            }
+            return undefined;
+        }
+        /// e.g. "props" for React.d.ts,
+        /// or 'undefined' if ElementAttributesProperty doesn't exist (which means all
+        ///     non-intrinsic elements' attributes type is 'any'),
+        /// or '' if it has 0 properties (which means every
+        ///     non-intrinsic elements' attributes type is the element instance type)
+        function getJsxElementPropertiesName(jsxNamespace) {
+            return getNameFromJsxElementAttributesContainer(JsxNames.ElementAttributesPropertyNameContainer, jsxNamespace);
+        }
+        function getJsxElementChildrenPropertyName(jsxNamespace) {
+            return getNameFromJsxElementAttributesContainer(JsxNames.ElementChildrenAttributeNameContainer, jsxNamespace);
+        }
+        function getApparentTypeOfJsxPropsType(propsType) {
+            if (!propsType) {
+                return undefined;
+            }
+            if (propsType.flags & 524288 /* Intersection */) {
+                var propsApparentType = [];
+                for (var _i = 0, _a = propsType.types; _i < _a.length; _i++) {
+                    var t = _a[_i];
+                    propsApparentType.push(getApparentType(t));
+                }
+                return getIntersectionType(propsApparentType);
+            }
+            return getApparentType(propsType);
+        }
+        /**
+         * Get JSX attributes type by trying to resolve openingLikeElement as a stateless function component.
+         * Return only attributes type of successfully resolved call signature.
+         * This function assumes that the caller handled other possible element type of the JSX element (e.g. stateful component)
+         * Unlike tryGetAllJsxStatelessFunctionAttributesType, this function is a default behavior of type-checkers.
+         * @param openingLikeElement a JSX opening-like element to find attributes type
+         * @param elementType a type of the opening-like element. This elementType can't be an union type
+         * @param elemInstanceType an element instance type (the result of newing or invoking this tag)
+         * @param elementClassType a JSX-ElementClass type. This is a result of looking up ElementClass interface in the JSX global
+         */
+        function defaultTryGetJsxStatelessFunctionAttributesType(openingLikeElement, elementType, elemInstanceType, elementClassType) {
+            ts.Debug.assert(!(elementType.flags & 262144 /* Union */));
+            if (!elementClassType || !isTypeAssignableTo(elemInstanceType, elementClassType)) {
+                var jsxStatelessElementType = getJsxStatelessElementTypeAt(openingLikeElement);
+                if (jsxStatelessElementType) {
+                    // We don't call getResolvedSignature here because we have already resolve the type of JSX Element.
+                    var callSignature = getResolvedJsxStatelessFunctionSignature(openingLikeElement, elementType, /*candidatesOutArray*/ undefined);
+                    if (callSignature !== unknownSignature) {
+                        var callReturnType = callSignature && getReturnTypeOfSignature(callSignature);
+                        var paramType = callReturnType && (callSignature.parameters.length === 0 ? emptyObjectType : getTypeOfSymbol(callSignature.parameters[0]));
+                        paramType = getApparentTypeOfJsxPropsType(paramType);
+                        if (callReturnType && isTypeAssignableTo(callReturnType, jsxStatelessElementType)) {
+                            // Intersect in JSX.IntrinsicAttributes if it exists
+                            var intrinsicAttributes = getJsxType(JsxNames.IntrinsicAttributes, openingLikeElement);
+                            if (intrinsicAttributes !== errorType) {
+                                paramType = intersectTypes(intrinsicAttributes, paramType);
+                            }
+                            return paramType;
+                        }
+                    }
+                }
+            }
+            return undefined;
+        }
+        /**
+         * Get JSX attributes type by trying to resolve openingLikeElement as a stateless function component.
+         * Return all attributes type of resolved call signature including candidate signatures.
+         * This function assumes that the caller handled other possible element type of the JSX element.
+         * This function is a behavior used by language service when looking up completion in JSX element.
+         * @param openingLikeElement a JSX opening-like element to find attributes type
+         * @param elementType a type of the opening-like element. This elementType can't be an union type
+         * @param elemInstanceType an element instance type (the result of newing or invoking this tag)
+         * @param elementClassType a JSX-ElementClass type. This is a result of looking up ElementClass interface in the JSX global
+         */
+        function tryGetAllJsxStatelessFunctionAttributesType(openingLikeElement, elementType, elemInstanceType, elementClassType) {
+            ts.Debug.assert(!(elementType.flags & 262144 /* Union */));
+            if (!elementClassType || !isTypeAssignableTo(elemInstanceType, elementClassType)) {
+                // Is this is a stateless function component? See if its single signature's return type is assignable to the JSX Element Type
+                var jsxStatelessElementType = getJsxStatelessElementTypeAt(openingLikeElement);
+                if (jsxStatelessElementType) {
+                    // We don't call getResolvedSignature because here we have already resolve the type of JSX Element.
+                    var candidatesOutArray = [];
+                    getResolvedJsxStatelessFunctionSignature(openingLikeElement, elementType, candidatesOutArray);
+                    var result = void 0;
+                    var allMatchingAttributesType = void 0;
+                    for (var _i = 0, candidatesOutArray_1 = candidatesOutArray; _i < candidatesOutArray_1.length; _i++) {
+                        var candidate = candidatesOutArray_1[_i];
+                        var callReturnType = getReturnTypeOfSignature(candidate);
+                        // TODO: GH#18217: callReturnType should always be defined...
+                        var paramType = callReturnType && (candidate.parameters.length === 0 ? emptyObjectType : getTypeOfSymbol(candidate.parameters[0]));
+                        paramType = getApparentTypeOfJsxPropsType(paramType);
+                        if (callReturnType && isTypeAssignableTo(callReturnType, jsxStatelessElementType)) {
+                            var shouldBeCandidate = true;
+                            for (var _a = 0, _b = openingLikeElement.attributes.properties; _a < _b.length; _a++) {
+                                var attribute = _b[_a];
+                                if (ts.isJsxAttribute(attribute) &&
+                                    isUnhyphenatedJsxName(attribute.name.escapedText) &&
+                                    !getPropertyOfType(paramType, attribute.name.escapedText)) { // TODO: GH#18217
+                                    shouldBeCandidate = false;
+                                    break;
+                                }
+                            }
+                            if (shouldBeCandidate) {
+                                result = intersectTypes(result, paramType);
+                            }
+                            allMatchingAttributesType = intersectTypes(allMatchingAttributesType, paramType);
+                        }
+                    }
+                    // If we can't find any matching, just return everything.
+                    if (!result) {
+                        result = allMatchingAttributesType;
+                    }
+                    // Intersect in JSX.IntrinsicAttributes if it exists
+                    var intrinsicAttributes = getJsxType(JsxNames.IntrinsicAttributes, openingLikeElement);
+                    if (intrinsicAttributes !== errorType) {
+                        result = intersectTypes(intrinsicAttributes, result);
+                    }
+                    return result;
+                }
+            }
+            return undefined;
+        }
+        function getInstantiatedJsxSignatures(openingLikeElement, elementType, reportErrors) {
+            var links = getNodeLinks(openingLikeElement);
+            if (!links.resolvedSignatures) {
+                links.resolvedSignatures = ts.createMap();
+            }
+            var cacheKey = "" + getTypeId(elementType);
+            if (links.resolvedSignatures.get(cacheKey) && links.resolvedSignatures.get(cacheKey) === resolvingSignaturesArray) {
+                return;
+            }
+            else if (links.resolvedSignatures.get(cacheKey)) {
+                return links.resolvedSignatures.get(cacheKey);
+            }
+            links.resolvedSignatures.set(cacheKey, resolvingSignaturesArray);
+            // Resolve the signatures, preferring constructor
+            var signatures = getSignaturesOfType(elementType, 1 /* Construct */);
+            if (signatures.length === 0) {
+                // No construct signatures, try call signatures
+                signatures = getSignaturesOfType(elementType, 0 /* Call */);
+                if (signatures.length === 0) {
+                    // We found no signatures at all, which is an error
+                    if (reportErrors) {
+                        error(openingLikeElement.tagName, ts.Diagnostics.JSX_element_type_0_does_not_have_any_construct_or_call_signatures, ts.getTextOfNode(openingLikeElement.tagName));
+                    }
+                    return;
+                }
+            }
+            // Instantiate in context of source type
+            var results = instantiateJsxSignatures(openingLikeElement, signatures);
+            links.resolvedSignatures.set(cacheKey, results);
+            return results;
+        }
+        /**
+         * Resolve attributes type of the given opening-like element. The attributes type is a type of attributes associated with the given elementType.
+         * For instance:
+         *      declare function Foo(attr: { p1: string}): JSX.Element;
+         *      <Foo p1={10} />;  // This function will try resolve "Foo" and return an attributes type of "Foo" which is "{ p1: string }"
+         *
+         * The function is intended to initially be called from getAttributesTypeFromJsxOpeningLikeElement which already handle JSX-intrinsic-element..
+         * This function will try to resolve custom JSX attributes type in following order: string literal, stateless function, and stateful component
+         *
+         * @param openingLikeElement a non-intrinsic JSXOPeningLikeElement
+         * @param shouldIncludeAllStatelessAttributesType a boolean indicating whether to include all attributes types from all stateless function signature
+         * @param sourceAttributesType Is the attributes type the user passed, and is used to create inferences in the target type if present
+         * @param elementType an instance type of the given opening-like element. If undefined, the function will check type openinglikeElement's tagname.
+         * @param elementClassType a JSX-ElementClass type. This is a result of looking up ElementClass interface in the JSX global (imported from react.d.ts)
+         * @return attributes type if able to resolve the type of node
+         *         anyType if there is no type ElementAttributesProperty or there is an error
+         *         emptyObjectType if there is no "prop" in the element instance type
+         */
+        function resolveCustomJsxElementAttributesType(openingLikeElement, shouldIncludeAllStatelessAttributesType, elementType, elementClassType) {
+            if (elementType.flags & 262144 /* Union */) {
+                var types = elementType.types;
+                return getUnionType(types.map(function (type) {
+                    return resolveCustomJsxElementAttributesType(openingLikeElement, shouldIncludeAllStatelessAttributesType, type, elementClassType);
+                }), 2 /* Subtype */);
+            }
+            // Shortcircuit any
+            if (isTypeAny(elementType)) {
+                return elementType;
+            }
+            // If the elemType is a string type, we have to return anyType to prevent an error downstream as we will try to find construct or call signature of the type
+            else if (elementType.flags & 4 /* String */) {
+                return anyType;
+            }
+            else if (elementType.flags & 64 /* StringLiteral */) {
+                // If the elemType is a stringLiteral type, we can then provide a check to make sure that the string literal type is one of the Jsx intrinsic element type
+                // For example:
+                //      var CustomTag: "h1" = "h1";
+                //      <CustomTag> Hello World </CustomTag>
+                var intrinsicElementsType = getJsxType(JsxNames.IntrinsicElements, openingLikeElement);
+                if (intrinsicElementsType !== errorType) {
+                    var stringLiteralTypeName = elementType.value;
+                    var intrinsicProp = getPropertyOfType(intrinsicElementsType, ts.escapeLeadingUnderscores(stringLiteralTypeName));
+                    if (intrinsicProp) {
+                        return getTypeOfSymbol(intrinsicProp);
+                    }
+                    var indexSignatureType = getIndexTypeOfType(intrinsicElementsType, 0 /* String */);
+                    if (indexSignatureType) {
+                        return indexSignatureType;
+                    }
+                    error(openingLikeElement, ts.Diagnostics.Property_0_does_not_exist_on_type_1, stringLiteralTypeName, "JSX." + JsxNames.IntrinsicElements);
+                }
+                // If we need to report an error, we already done so here. So just return any to prevent any more error downstream
+                return anyType;
+            }
+            // Get the element instance type (the result of newing or invoking this tag)
+            var instantiatedSignatures = getInstantiatedJsxSignatures(openingLikeElement, elementType, /*reportErrors*/ true);
+            if (!ts.length(instantiatedSignatures)) {
+                return errorType;
+            }
+            var elemInstanceType = getUnionType(instantiatedSignatures.map(getReturnTypeOfSignature), 2 /* Subtype */);
+            // If we should include all stateless attributes type, then get all attributes type from all stateless function signature.
+            // Otherwise get only attributes type from the signature picked by choose-overload logic.
+            var statelessAttributesType = shouldIncludeAllStatelessAttributesType ?
+                tryGetAllJsxStatelessFunctionAttributesType(openingLikeElement, elementType, elemInstanceType, elementClassType) :
+                defaultTryGetJsxStatelessFunctionAttributesType(openingLikeElement, elementType, elemInstanceType, elementClassType);
+            if (statelessAttributesType) {
+                return statelessAttributesType;
+            }
+            // Issue an error if this return type isn't assignable to JSX.ElementClass
+            if (elementClassType) {
+                checkTypeRelatedTo(elemInstanceType, elementClassType, assignableRelation, openingLikeElement, ts.Diagnostics.JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements);
+            }
+            var isJs = ts.isInJavaScriptFile(openingLikeElement);
+            return getUnionType(instantiatedSignatures.map(function (sig) { return getJsxPropsTypeFromClassType(sig, isJs, openingLikeElement, /*reportErrors*/ true); }));
+        }
+        /**
+         * Get attributes type of the given intrinsic opening-like Jsx element by resolving the tag name.
+         * The function is intended to be called from a function which has checked that the opening element is an intrinsic element.
+         * @param node an intrinsic JSX opening-like element
+         */
+        function getIntrinsicAttributesTypeFromJsxOpeningLikeElement(node) {
+            ts.Debug.assert(isJsxIntrinsicIdentifier(node.tagName));
+            var links = getNodeLinks(node);
+            if (!links.resolvedJsxElementAttributesType) {
+                var symbol = getIntrinsicTagSymbol(node);
+                if (links.jsxFlags & 1 /* IntrinsicNamedElement */) {
+                    return links.resolvedJsxElementAttributesType = getTypeOfSymbol(symbol);
+                }
+                else if (links.jsxFlags & 2 /* IntrinsicIndexedElement */) {
+                    return links.resolvedJsxElementAttributesType = getIndexInfoOfSymbol(symbol, 0 /* String */).type;
+                }
+                else {
+                    return links.resolvedJsxElementAttributesType = errorType;
+                }
+            }
+            return links.resolvedJsxElementAttributesType;
+        }
+        /**
+         * Get attributes type of the given custom opening-like JSX element.
+         * This function is intended to be called from a caller that handles intrinsic JSX element already.
+         * @param node a custom JSX opening-like element
+         * @param shouldIncludeAllStatelessAttributesType a boolean value used by language service to get all possible attributes type from an overload stateless function component
+         */
+        function getCustomJsxElementAttributesType(node, shouldIncludeAllStatelessAttributesType) {
+            return resolveCustomJsxElementAttributesType(node, shouldIncludeAllStatelessAttributesType, checkExpression(node.tagName), getJsxElementClassTypeAt(node));
+        }
+        /**
+         * Get all possible attributes type, especially from an overload stateless function component, of the given JSX opening-like element.
+         * This function is called by language service (see: completions-tryGetGlobalSymbols).
+         * @param node a JSX opening-like element to get attributes type for
+         */
+        function getAllAttributesTypeFromJsxOpeningLikeElement(node) {
+            if (isJsxIntrinsicIdentifier(node.tagName)) {
+                return getIntrinsicAttributesTypeFromJsxOpeningLikeElement(node);
+            }
+            else {
+                // Because in language service, the given JSX opening-like element may be incomplete and therefore,
+                // we can't resolve to exact signature if the element is a stateless function component so the best thing to do is return all attributes type from all overloads.
+                return getCustomJsxElementAttributesType(node, /*shouldIncludeAllStatelessAttributesType*/ true);
+            }
+        }
+        /**
+         * Get the attributes type, which indicates the attributes that are valid on the given JSXOpeningLikeElement.
+         * @param node a JSXOpeningLikeElement node
+         * @return an attributes type of the given node
+         */
+        function getAttributesTypeFromJsxOpeningLikeElement(node) {
+            if (isJsxIntrinsicIdentifier(node.tagName)) {
+                return getIntrinsicAttributesTypeFromJsxOpeningLikeElement(node);
+            }
+            else {
+                return getCustomJsxElementAttributesType(node, /*shouldIncludeAllStatelessAttributesType*/ false);
+            }
+        }
+        /**
+         * Given a JSX attribute, returns the symbol for the corresponds property
+         * of the element attributes type. Will return unknownSymbol for attributes
+         * that have no matching element attributes type property.
+         */
+        function getJsxAttributePropertySymbol(attrib) {
+            var attributesType = getAttributesTypeFromJsxOpeningLikeElement(attrib.parent.parent);
+            var prop = getPropertyOfType(attributesType, attrib.name.escapedText);
+            return prop || unknownSymbol;
+        }
+        function getJsxElementClassTypeAt(location) {
+            var type = getJsxType(JsxNames.ElementClass, location);
+            if (type === errorType)
+                return undefined;
+            return type;
+        }
+        function getJsxElementTypeAt(location) {
+            return getJsxType(JsxNames.Element, location);
+        }
+        function getJsxStatelessElementTypeAt(location) {
+            var jsxElementType = getJsxElementTypeAt(location);
+            if (jsxElementType) {
+                return getUnionType([jsxElementType, nullType]);
+            }
+        }
+        /**
+         * Returns all the properties of the Jsx.IntrinsicElements interface
+         */
+        function getJsxIntrinsicTagNamesAt(location) {
+            var intrinsics = getJsxType(JsxNames.IntrinsicElements, location);
+            return intrinsics ? getPropertiesOfType(intrinsics) : ts.emptyArray;
+        }
+        function checkJsxPreconditions(errorNode) {
+            // Preconditions for using JSX
+            if ((compilerOptions.jsx || 0 /* None */) === 0 /* None */) {
+                error(errorNode, ts.Diagnostics.Cannot_use_JSX_unless_the_jsx_flag_is_provided);
+            }
+            if (getJsxElementTypeAt(errorNode) === undefined) {
+                if (noImplicitAny) {
+                    error(errorNode, ts.Diagnostics.JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist);
+                }
+            }
+        }
+        function checkJsxOpeningLikeElementOrOpeningFragment(node, checkMode) {
+            var isNodeOpeningLikeElement = ts.isJsxOpeningLikeElement(node);
+            if (isNodeOpeningLikeElement) {
+                checkGrammarJsxElement(node);
+            }
+            checkJsxPreconditions(node);
+            // The reactNamespace/jsxFactory's root symbol should be marked as 'used' so we don't incorrectly elide its import.
+            // And if there is no reactNamespace/jsxFactory's symbol in scope when targeting React emit, we should issue an error.
+            var reactRefErr = diagnostics && compilerOptions.jsx === 2 /* React */ ? ts.Diagnostics.Cannot_find_name_0 : undefined;
+            var reactNamespace = getJsxNamespace(node);
+            var reactLocation = isNodeOpeningLikeElement ? node.tagName : node;
+            var reactSym = resolveName(reactLocation, reactNamespace, 67216319 /* Value */, reactRefErr, reactNamespace, /*isUse*/ true);
+            if (reactSym) {
+                // Mark local symbol as referenced here because it might not have been marked
+                // if jsx emit was not react as there wont be error being emitted
+                reactSym.isReferenced = 67108863 /* All */;
+                // If react symbol is alias, mark it as refereced
+                if (reactSym.flags & 2097152 /* Alias */ && !isConstEnumOrConstEnumOnlyModule(resolveAlias(reactSym))) {
+                    markAliasSymbolAsReferenced(reactSym);
+                }
+            }
+            if (isNodeOpeningLikeElement) {
+                checkJsxAttributesAssignableToTagNameAttributes(node, checkMode);
+            }
+            else {
+                checkJsxChildren(node.parent);
+            }
+        }
+        /**
+         * Check if a property with the given name is known anywhere in the given type. In an object type, a property
+         * is considered known if
+         * 1. the object type is empty and the check is for assignability, or
+         * 2. if the object type has index signatures, or
+         * 3. if the property is actually declared in the object type
+         *    (this means that 'toString', for example, is not usually a known property).
+         * 4. In a union or intersection type,
+         *    a property is considered known if it is known in any constituent type.
+         * @param targetType a type to search a given name in
+         * @param name a property name to search
+         * @param isComparingJsxAttributes a boolean flag indicating whether we are searching in JsxAttributesType
+         */
+        function isKnownProperty(targetType, name, isComparingJsxAttributes) {
+            if (targetType.flags & 131072 /* Object */) {
+                var resolved = resolveStructuredTypeMembers(targetType);
+                if (resolved.stringIndexInfo ||
+                    resolved.numberIndexInfo && isNumericLiteralName(name) ||
+                    getPropertyOfObjectType(targetType, name) ||
+                    isComparingJsxAttributes && !isUnhyphenatedJsxName(name)) {
+                    // For JSXAttributes, if the attribute has a hyphenated name, consider that the attribute to be known.
+                    return true;
+                }
+            }
+            else if (targetType.flags & 786432 /* UnionOrIntersection */) {
+                for (var _i = 0, _a = targetType.types; _i < _a.length; _i++) {
+                    var t = _a[_i];
+                    if (isKnownProperty(t, name, isComparingJsxAttributes)) {
+                        return true;
+                    }
+                }
+            }
+            return false;
+        }
+        /**
+         * Check whether the given attributes of JSX opening-like element is assignable to the tagName attributes.
+         *      Get the attributes type of the opening-like element through resolving the tagName, "target attributes"
+         *      Check assignablity between given attributes property, "source attributes", and the "target attributes"
+         * @param openingLikeElement an opening-like JSX element to check its JSXAttributes
+         */
+        function checkJsxAttributesAssignableToTagNameAttributes(openingLikeElement, checkMode) {
+            // The function involves following steps:
+            //      1. Figure out expected attributes type by resolving tagName of the JSX opening-like element, targetAttributesType.
+            //         During these steps, we will try to resolve the tagName as intrinsic name, stateless function, stateful component (in the order)
+            //      2. Solved JSX attributes type given by users, sourceAttributesType, which is by resolving "attributes" property of the JSX opening-like element.
+            //      3. Check if the two are assignable to each other
+            // targetAttributesType is a type of an attribute from resolving tagName of an opening-like JSX element.
+            var targetAttributesType = isJsxIntrinsicIdentifier(openingLikeElement.tagName) ?
+                getIntrinsicAttributesTypeFromJsxOpeningLikeElement(openingLikeElement) :
+                getCustomJsxElementAttributesType(openingLikeElement, /*shouldIncludeAllStatelessAttributesType*/ false);
+            // sourceAttributesType is a type of an attributes properties.
+            // i.e <div attr1={10} attr2="string" />
+            //     attr1 and attr2 are treated as JSXAttributes attached in the JsxOpeningLikeElement as "attributes".
+            var sourceAttributesType = createJsxAttributesTypeFromAttributesProperty(openingLikeElement, checkMode);
+            // Check if sourceAttributesType assignable to targetAttributesType though this check will allow excess properties
+            var isSourceAttributeTypeAssignableToTarget = isTypeAssignableTo(sourceAttributesType, targetAttributesType);
+            // After we check for assignability, we will do another pass to check that all explicitly specified attributes have correct name corresponding in targetAttributeType.
+            // This will allow excess properties in spread type as it is very common pattern to spread outer attributes into React component in its render method.
+            if (isSourceAttributeTypeAssignableToTarget && !isTypeAny(sourceAttributesType) && !isTypeAny(targetAttributesType)) {
+                for (var _i = 0, _a = openingLikeElement.attributes.properties; _i < _a.length; _i++) {
+                    var attribute = _a[_i];
+                    if (!ts.isJsxAttribute(attribute)) {
+                        continue;
+                    }
+                    var attrName = attribute.name;
+                    var isNotIgnoredJsxProperty = (isUnhyphenatedJsxName(ts.idText(attrName)) || !!(getPropertyOfType(targetAttributesType, attrName.escapedText)));
+                    if (isNotIgnoredJsxProperty && !isKnownProperty(targetAttributesType, attrName.escapedText, /*isComparingJsxAttributes*/ true)) {
+                        error(attribute, ts.Diagnostics.Property_0_does_not_exist_on_type_1, ts.idText(attrName), typeToString(targetAttributesType));
+                        // We break here so that errors won't be cascading
+                        break;
+                    }
+                }
+            }
+            else if (!isSourceAttributeTypeAssignableToTarget) {
+                // Assignability failure - check each prop individually, and if that fails, fall back on the bad error span
+                if (ts.length(openingLikeElement.attributes.properties)) {
+                    var reportedError = false;
+                    var _loop_8 = function (prop) {
+                        if (ts.isJsxSpreadAttribute(prop))
+                            return "continue";
+                        var name = ts.idText(prop.name);
+                        var sourcePropType = getIndexedAccessType(sourceAttributesType, getLiteralType(name));
+                        var targetPropType = getIndexedAccessType(targetAttributesType, getLiteralType(name));
+                        var rootChain = function () { return ts.chainDiagnosticMessages(
+                        /*details*/ undefined, ts.Diagnostics.Types_of_property_0_are_incompatible, name); };
+                        if (!checkTypeAssignableTo(sourcePropType, targetPropType, prop, /*headMessage*/ undefined, rootChain)) {
+                            reportedError = true;
+                        }
+                    };
+                    for (var _b = 0, _c = openingLikeElement.attributes.properties; _b < _c.length; _b++) {
+                        var prop = _c[_b];
+                        _loop_8(prop);
+                    }
+                    if (reportedError) {
+                        return;
+                    }
+                }
+                // Report fallback error on just the component name
+                checkTypeAssignableTo(sourceAttributesType, targetAttributesType, openingLikeElement.tagName);
+            }
+        }
+        function checkJsxExpression(node, checkMode) {
+            if (node.expression) {
+                var type = checkExpression(node.expression, checkMode);
+                if (node.dotDotDotToken && type !== anyType && !isArrayType(type)) {
+                    error(node, ts.Diagnostics.JSX_spread_child_must_be_an_array_type);
+                }
+                return type;
+            }
+            else {
+                return errorType;
+            }
+        }
+        // If a symbol is a synthesized symbol with no value declaration, we assume it is a property. Example of this are the synthesized
+        // '.prototype' property as well as synthesized tuple index properties.
+        function getDeclarationKindFromSymbol(s) {
+            return s.valueDeclaration ? s.valueDeclaration.kind : 152 /* PropertyDeclaration */;
+        }
+        function getDeclarationNodeFlagsFromSymbol(s) {
+            return s.valueDeclaration ? ts.getCombinedNodeFlags(s.valueDeclaration) : 0;
+        }
+        /**
+         * Return whether this symbol is a member of a prototype somewhere
+         * Note that this is not tracked well within the compiler, so the answer may be incorrect.
+         */
+        function isPrototypeProperty(symbol) {
+            if (symbol.flags & 8192 /* Method */ || ts.getCheckFlags(symbol) & 4 /* SyntheticMethod */) {
+                return true;
+            }
+            if (ts.isInJavaScriptFile(symbol.valueDeclaration)) {
+                var parent = symbol.valueDeclaration.parent;
+                return parent && ts.isBinaryExpression(parent) &&
+                    ts.getSpecialPropertyAssignmentKind(parent) === 3 /* PrototypeProperty */;
+            }
+        }
+        /**
+         * Check whether the requested property access is valid.
+         * Returns true if node is a valid property access, and false otherwise.
+         * @param node The node to be checked.
+         * @param left The left hand side of the property access (e.g.: the super in `super.foo`).
+         * @param type The type of left.
+         * @param prop The symbol for the right hand side of the property access.
+         */
+        function checkPropertyAccessibility(node, left, type, prop) {
+            var flags = ts.getDeclarationModifierFlagsFromSymbol(prop);
+            var errorNode = node.kind === 185 /* PropertyAccessExpression */ || node.kind === 232 /* VariableDeclaration */ ?
+                node.name :
+                node.kind === 179 /* ImportType */ ?
+                    node :
+                    node.right;
+            if (ts.getCheckFlags(prop) & 256 /* ContainsPrivate */) {
+                // Synthetic property with private constituent property
+                error(errorNode, ts.Diagnostics.Property_0_has_conflicting_declarations_and_is_inaccessible_in_type_1, symbolToString(prop), typeToString(type));
+                return false;
+            }
+            if (left.kind === 97 /* SuperKeyword */) {
+                // TS 1.0 spec (April 2014): 4.8.2
+                // - In a constructor, instance member function, instance member accessor, or
+                //   instance member variable initializer where this references a derived class instance,
+                //   a super property access is permitted and must specify a public instance member function of the base class.
+                // - In a static member function or static member accessor
+                //   where this references the constructor function object of a derived class,
+                //   a super property access is permitted and must specify a public static member function of the base class.
+                if (languageVersion < 2 /* ES2015 */) {
+                    if (symbolHasNonMethodDeclaration(prop)) {
+                        error(errorNode, ts.Diagnostics.Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword);
+                        return false;
+                    }
+                }
+                if (flags & 128 /* Abstract */) {
+                    // A method cannot be accessed in a super property access if the method is abstract.
+                    // This error could mask a private property access error. But, a member
+                    // cannot simultaneously be private and abstract, so this will trigger an
+                    // additional error elsewhere.
+                    error(errorNode, ts.Diagnostics.Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression, symbolToString(prop), typeToString(getDeclaringClass(prop)));
+                    return false;
+                }
+            }
+            // Referencing abstract properties within their own constructors is not allowed
+            if ((flags & 128 /* Abstract */) && ts.isThisProperty(node) && symbolHasNonMethodDeclaration(prop)) {
+                var declaringClassDeclaration = ts.getClassLikeDeclarationOfSymbol(getParentOfSymbol(prop));
+                if (declaringClassDeclaration && isNodeWithinConstructorOfClass(node, declaringClassDeclaration)) {
+                    error(errorNode, ts.Diagnostics.Abstract_property_0_in_class_1_cannot_be_accessed_in_the_constructor, symbolToString(prop), ts.getTextOfIdentifierOrLiteral(declaringClassDeclaration.name)); // TODO: GH#18217
+                    return false;
+                }
+            }
+            // Public properties are otherwise accessible.
+            if (!(flags & 24 /* NonPublicAccessibilityModifier */)) {
+                return true;
+            }
+            // Property is known to be private or protected at this point
+            // Private property is accessible if the property is within the declaring class
+            if (flags & 8 /* Private */) {
+                var declaringClassDeclaration = ts.getClassLikeDeclarationOfSymbol(getParentOfSymbol(prop));
+                if (!isNodeWithinClass(node, declaringClassDeclaration)) {
+                    error(errorNode, ts.Diagnostics.Property_0_is_private_and_only_accessible_within_class_1, symbolToString(prop), typeToString(getDeclaringClass(prop)));
+                    return false;
+                }
+                return true;
+            }
+            // Property is known to be protected at this point
+            // All protected properties of a supertype are accessible in a super access
+            if (left.kind === 97 /* SuperKeyword */) {
+                return true;
+            }
+            // Find the first enclosing class that has the declaring classes of the protected constituents
+            // of the property as base classes
+            var enclosingClass = forEachEnclosingClass(node, function (enclosingDeclaration) {
+                var enclosingClass = getDeclaredTypeOfSymbol(getSymbolOfNode(enclosingDeclaration));
+                return isClassDerivedFromDeclaringClasses(enclosingClass, prop) ? enclosingClass : undefined;
+            });
+            // A protected property is accessible if the property is within the declaring class or classes derived from it
+            if (!enclosingClass) {
+                // allow PropertyAccessibility if context is in function with this parameter
+                // static member access is disallow
+                var thisParameter = void 0;
+                if (flags & 32 /* Static */ || !(thisParameter = getThisParameterFromNodeContext(node)) || !thisParameter.type) {
+                    error(errorNode, ts.Diagnostics.Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses, symbolToString(prop), typeToString(getDeclaringClass(prop) || type));
+                    return false;
+                }
+                var thisType = getTypeFromTypeNode(thisParameter.type);
+                enclosingClass = ((thisType.flags & 65536 /* TypeParameter */) ? getConstraintFromTypeParameter(thisType) : thisType);
+            }
+            // No further restrictions for static properties
+            if (flags & 32 /* Static */) {
+                return true;
+            }
+            if (type.flags & 65536 /* TypeParameter */) {
+                // get the original type -- represented as the type constraint of the 'this' type
+                type = type.isThisType ? getConstraintOfTypeParameter(type) : getBaseConstraintOfType(type); // TODO: GH#18217 Use a different variable that's allowed to be undefined
+            }
+            if (!type || !hasBaseType(type, enclosingClass)) {
+                error(errorNode, ts.Diagnostics.Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1, symbolToString(prop), typeToString(enclosingClass));
+                return false;
+            }
+            return true;
+        }
+        function getThisParameterFromNodeContext(node) {
+            var thisContainer = ts.getThisContainer(node, /* includeArrowFunctions */ false);
+            return thisContainer && ts.isFunctionLike(thisContainer) ? ts.getThisParameter(thisContainer) : undefined;
+        }
+        function symbolHasNonMethodDeclaration(symbol) {
+            return forEachProperty(symbol, function (prop) {
+                var propKind = getDeclarationKindFromSymbol(prop);
+                return propKind !== 154 /* MethodDeclaration */ && propKind !== 153 /* MethodSignature */;
+            });
+        }
+        function checkNonNullExpression(node, nullDiagnostic, undefinedDiagnostic, nullOrUndefinedDiagnostic) {
+            return checkNonNullType(checkExpression(node), node, nullDiagnostic, undefinedDiagnostic, nullOrUndefinedDiagnostic);
+        }
+        function checkNonNullType(type, node, nullDiagnostic, undefinedDiagnostic, nullOrUndefinedDiagnostic) {
+            if (type.flags & 2 /* Unknown */) {
+                error(node, ts.Diagnostics.Object_is_of_type_unknown);
+                return errorType;
+            }
+            var kind = (strictNullChecks ? getFalsyFlags(type) : type.flags) & 24576 /* Nullable */;
+            if (kind) {
+                error(node, kind & 8192 /* Undefined */ ? kind & 16384 /* Null */ ?
+                    (nullOrUndefinedDiagnostic || ts.Diagnostics.Object_is_possibly_null_or_undefined) :
+                    (undefinedDiagnostic || ts.Diagnostics.Object_is_possibly_undefined) :
+                    (nullDiagnostic || ts.Diagnostics.Object_is_possibly_null));
+                var t = getNonNullableType(type);
+                return t.flags & (24576 /* Nullable */ | 32768 /* Never */) ? errorType : t;
+            }
+            return type;
+        }
+        function checkPropertyAccessExpression(node) {
+            return checkPropertyAccessExpressionOrQualifiedName(node, node.expression, node.name);
+        }
+        function checkQualifiedName(node) {
+            return checkPropertyAccessExpressionOrQualifiedName(node, node.left, node.right);
+        }
+        function checkPropertyAccessExpressionOrQualifiedName(node, left, right) {
+            var propType;
+            var leftType = checkNonNullExpression(left);
+            var parentSymbol = getNodeLinks(left).resolvedSymbol;
+            var apparentType = getApparentType(getWidenedType(leftType));
+            if (isTypeAny(apparentType) || apparentType === silentNeverType) {
+                if (ts.isIdentifier(left) && parentSymbol) {
+                    markAliasReferenced(parentSymbol, node);
+                }
+                return apparentType;
+            }
+            var assignmentKind = ts.getAssignmentTargetKind(node);
+            var prop = getPropertyOfType(apparentType, right.escapedText);
+            if (ts.isIdentifier(left) && parentSymbol && !(prop && isConstEnumOrConstEnumOnlyModule(prop))) {
+                markAliasReferenced(parentSymbol, node);
+            }
+            if (!prop) {
+                var indexInfo = getIndexInfoOfType(apparentType, 0 /* String */);
+                if (!(indexInfo && indexInfo.type)) {
+                    if (right.escapedText && !checkAndReportErrorForExtendingInterface(node)) {
+                        reportNonexistentProperty(right, leftType.flags & 65536 /* TypeParameter */ && leftType.isThisType ? apparentType : leftType);
+                    }
+                    return errorType;
+                }
+                if (indexInfo.isReadonly && (ts.isAssignmentTarget(node) || ts.isDeleteTarget(node))) {
+                    error(node, ts.Diagnostics.Index_signature_in_type_0_only_permits_reading, typeToString(apparentType));
+                }
+                propType = indexInfo.type;
+            }
+            else {
+                checkPropertyNotUsedBeforeDeclaration(prop, node, right);
+                markPropertyAsReferenced(prop, node, left.kind === 99 /* ThisKeyword */);
+                getNodeLinks(node).resolvedSymbol = prop;
+                checkPropertyAccessibility(node, left, apparentType, prop);
+                if (assignmentKind) {
+                    if (isReferenceToReadonlyEntity(node, prop) || isReferenceThroughNamespaceImport(node)) {
+                        error(right, ts.Diagnostics.Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property, ts.idText(right));
+                        return errorType;
+                    }
+                }
+                propType = getConstraintForLocation(getTypeOfSymbol(prop), node);
+            }
+            // Only compute control flow type if this is a property access expression that isn't an
+            // assignment target, and the referenced property was declared as a variable, property,
+            // accessor, or optional method.
+            if (node.kind !== 185 /* PropertyAccessExpression */ ||
+                assignmentKind === 1 /* Definite */ ||
+                prop && !(prop.flags & (3 /* Variable */ | 4 /* Property */ | 98304 /* Accessor */)) && !(prop.flags & 8192 /* Method */ && propType.flags & 262144 /* Union */)) {
+                return propType;
+            }
+            // If strict null checks and strict property initialization checks are enabled, if we have
+            // a this.xxx property access, if the property is an instance property without an initializer,
+            // and if we are in a constructor of the same class as the property declaration, assume that
+            // the property is uninitialized at the top of the control flow.
+            var assumeUninitialized = false;
+            if (strictNullChecks && strictPropertyInitialization && left.kind === 99 /* ThisKeyword */) {
+                var declaration = prop && prop.valueDeclaration;
+                if (declaration && isInstancePropertyWithoutInitializer(declaration)) {
+                    var flowContainer = getControlFlowContainer(node);
+                    if (flowContainer.kind === 155 /* Constructor */ && flowContainer.parent === declaration.parent) {
+                        assumeUninitialized = true;
+                    }
+                }
+            }
+            var flowType = getFlowTypeOfReference(node, propType, assumeUninitialized ? getOptionalType(propType) : propType);
+            if (assumeUninitialized && !(getFalsyFlags(propType) & 8192 /* Undefined */) && getFalsyFlags(flowType) & 8192 /* Undefined */) {
+                error(right, ts.Diagnostics.Property_0_is_used_before_being_assigned, symbolToString(prop)); // TODO: GH#18217
+                // Return the declared type to reduce follow-on errors
+                return propType;
+            }
+            return assignmentKind ? getBaseTypeOfLiteralType(flowType) : flowType;
+        }
+        function checkPropertyNotUsedBeforeDeclaration(prop, node, right) {
+            var valueDeclaration = prop.valueDeclaration;
+            if (!valueDeclaration) {
+                return;
+            }
+            if (isInPropertyInitializer(node) &&
+                !isBlockScopedNameDeclaredBeforeUse(valueDeclaration, right)
+                && !isPropertyDeclaredInAncestorClass(prop)) {
+                error(right, ts.Diagnostics.Block_scoped_variable_0_used_before_its_declaration, ts.idText(right));
+            }
+            else if (valueDeclaration.kind === 235 /* ClassDeclaration */ &&
+                node.parent.kind !== 162 /* TypeReference */ &&
+                !(valueDeclaration.flags & 4194304 /* Ambient */) &&
+                !isBlockScopedNameDeclaredBeforeUse(valueDeclaration, right)) {
+                error(right, ts.Diagnostics.Class_0_used_before_its_declaration, ts.idText(right));
+            }
+        }
+        function isInPropertyInitializer(node) {
+            return !!ts.findAncestor(node, function (node) {
+                switch (node.kind) {
+                    case 152 /* PropertyDeclaration */:
+                        return true;
+                    case 270 /* PropertyAssignment */:
+                        // We might be in `a = { b: this.b }`, so keep looking. See `tests/cases/compiler/useBeforeDeclaration_propertyAssignment.ts`.
+                        return false;
+                    default:
+                        return ts.isExpressionNode(node) ? false : "quit";
+                }
+            });
+        }
+        /**
+         * It's possible that "prop.valueDeclaration" is a local declaration, but the property was also declared in a superclass.
+         * In that case we won't consider it used before its declaration, because it gets its value from the superclass' declaration.
+         */
+        function isPropertyDeclaredInAncestorClass(prop) {
+            if (!(prop.parent.flags & 32 /* Class */)) {
+                return false;
+            }
+            var classType = getTypeOfSymbol(prop.parent);
+            while (true) {
+                classType = classType.symbol && getSuperClass(classType);
+                if (!classType) {
+                    return false;
+                }
+                var superProperty = getPropertyOfType(classType, prop.escapedName);
+                if (superProperty && superProperty.valueDeclaration) {
+                    return true;
+                }
+            }
+        }
+        function getSuperClass(classType) {
+            var x = getBaseTypes(classType);
+            if (x.length === 0) {
+                return undefined;
+            }
+            return getIntersectionType(x);
+        }
+        function reportNonexistentProperty(propNode, containingType) {
+            var errorInfo;
+            if (containingType.flags & 262144 /* Union */ && !(containingType.flags & 32764 /* Primitive */)) {
+                for (var _i = 0, _a = containingType.types; _i < _a.length; _i++) {
+                    var subtype = _a[_i];
+                    if (!getPropertyOfType(subtype, propNode.escapedText)) {
+                        errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Property_0_does_not_exist_on_type_1, ts.declarationNameToString(propNode), typeToString(subtype));
+                        break;
+                    }
+                }
+            }
+            var promisedType = getPromisedTypeOfPromise(containingType);
+            if (promisedType && getPropertyOfType(promisedType, propNode.escapedText)) {
+                errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Property_0_does_not_exist_on_type_1_Did_you_forget_to_use_await, ts.declarationNameToString(propNode), typeToString(containingType));
+            }
+            else {
+                var suggestion = getSuggestionForNonexistentProperty(propNode, containingType);
+                if (suggestion !== undefined) {
+                    errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Property_0_does_not_exist_on_type_1_Did_you_mean_2, ts.declarationNameToString(propNode), typeToString(containingType), suggestion);
+                }
+                else {
+                    errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Property_0_does_not_exist_on_type_1, ts.declarationNameToString(propNode), typeToString(containingType));
+                }
+            }
+            diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(propNode, errorInfo));
+        }
+        function getSuggestionForNonexistentProperty(node, containingType) {
+            var suggestion = getSpellingSuggestionForName(ts.idText(node), getPropertiesOfType(containingType), 67216319 /* Value */);
+            return suggestion && ts.symbolName(suggestion);
+        }
+        function getSuggestionForNonexistentSymbol(location, outerName, meaning) {
+            ts.Debug.assert(outerName !== undefined, "outername should always be defined");
+            var result = resolveNameHelper(location, outerName, meaning, /*nameNotFoundMessage*/ undefined, outerName, /*isUse*/ false, /*excludeGlobals*/ false, function (symbols, name, meaning) {
+                ts.Debug.assertEqual(outerName, name, "name should equal outerName");
+                var symbol = getSymbol(symbols, name, meaning);
+                // Sometimes the symbol is found when location is a return type of a function: `typeof x` and `x` is declared in the body of the function
+                // So the table *contains* `x` but `x` isn't actually in scope.
+                // However, resolveNameHelper will continue and call this callback again, so we'll eventually get a correct suggestion.
+                return symbol || getSpellingSuggestionForName(ts.unescapeLeadingUnderscores(name), ts.arrayFrom(symbols.values()), meaning);
+            });
+            return result && ts.symbolName(result);
+        }
+        function getSuggestionForNonexistentModule(name, targetModule) {
+            var suggestion = targetModule.exports && getSpellingSuggestionForName(ts.idText(name), getExportsOfModuleAsArray(targetModule), 2623475 /* ModuleMember */);
+            return suggestion && ts.symbolName(suggestion);
+        }
+        /**
+         * Given a name and a list of symbols whose names are *not* equal to the name, return a spelling suggestion if there is one that is close enough.
+         * Names less than length 3 only check for case-insensitive equality, not levenshtein distance.
+         *
+         * If there is a candidate that's the same except for case, return that.
+         * If there is a candidate that's within one edit of the name, return that.
+         * Otherwise, return the candidate with the smallest Levenshtein distance,
+         *    except for candidates:
+         *      * With no name
+         *      * Whose meaning doesn't match the `meaning` parameter.
+         *      * Whose length differs from the target name by more than 0.34 of the length of the name.
+         *      * Whose levenshtein distance is more than 0.4 of the length of the name
+         *        (0.4 allows 1 substitution/transposition for every 5 characters,
+         *         and 1 insertion/deletion at 3 characters)
+         */
+        function getSpellingSuggestionForName(name, symbols, meaning) {
+            return ts.getSpellingSuggestion(name, symbols, getCandidateName);
+            function getCandidateName(candidate) {
+                var candidateName = ts.symbolName(candidate);
+                return !ts.startsWith(candidateName, "\"") && candidate.flags & meaning ? candidateName : undefined;
+            }
+        }
+        function markPropertyAsReferenced(prop, nodeForCheckWriteOnly, isThisAccess) {
+            if (!prop || !(prop.flags & 106500 /* ClassMember */) || !prop.valueDeclaration || !ts.hasModifier(prop.valueDeclaration, 8 /* Private */)) {
+                return;
+            }
+            if (nodeForCheckWriteOnly && ts.isWriteOnlyAccess(nodeForCheckWriteOnly) && !(prop.flags & 65536 /* SetAccessor */ && !(prop.flags & 32768 /* GetAccessor */))) {
+                return;
+            }
+            if (isThisAccess) {
+                // Find any FunctionLikeDeclaration because those create a new 'this' binding. But this should only matter for methods (or getters/setters).
+                var containingMethod = ts.findAncestor(nodeForCheckWriteOnly, ts.isFunctionLikeDeclaration);
+                if (containingMethod && containingMethod.symbol === prop) {
+                    return;
+                }
+            }
+            (ts.getCheckFlags(prop) & 1 /* Instantiated */ ? getSymbolLinks(prop).target : prop).isReferenced = 67108863 /* All */;
+        }
+        function isValidPropertyAccess(node, propertyName) {
+            switch (node.kind) {
+                case 185 /* PropertyAccessExpression */:
+                    return isValidPropertyAccessWithType(node, node.expression, propertyName, getWidenedType(checkExpression(node.expression)));
+                case 146 /* QualifiedName */:
+                    return isValidPropertyAccessWithType(node, node.left, propertyName, getWidenedType(checkExpression(node.left)));
+                case 179 /* ImportType */:
+                    return isValidPropertyAccessWithType(node, node, propertyName, getTypeFromTypeNode(node));
+            }
+        }
+        function isValidPropertyAccessForCompletions(node, type, property) {
+            return isValidPropertyAccessWithType(node, node.kind === 179 /* ImportType */ ? node : node.expression, property.escapedName, type)
+                && (!(property.flags & 8192 /* Method */) || isValidMethodAccess(property, type));
+        }
+        function isValidMethodAccess(method, actualThisType) {
+            var propType = getTypeOfPropertyOfType(actualThisType, method.escapedName);
+            var signatures = getSignaturesOfType(getNonNullableType(propType), 0 /* Call */);
+            ts.Debug.assert(signatures.length !== 0);
+            return signatures.some(function (sig) {
+                var signatureThisType = getThisTypeOfSignature(sig);
+                return !signatureThisType || isTypeAssignableTo(actualThisType, getInstantiatedSignatureThisType(sig, signatureThisType, actualThisType));
+            });
+        }
+        function getInstantiatedSignatureThisType(sig, signatureThisType, actualThisType) {
+            if (!sig.typeParameters) {
+                return signatureThisType;
+            }
+            var context = createInferenceContext(sig.typeParameters, sig, 0 /* None */);
+            inferTypes(context.inferences, actualThisType, signatureThisType);
+            return instantiateType(signatureThisType, createSignatureTypeMapper(sig, getInferredTypes(context)));
+        }
+        function isValidPropertyAccessWithType(node, left, propertyName, type) {
+            if (type === errorType || isTypeAny(type)) {
+                return true;
+            }
+            var prop = getPropertyOfType(type, propertyName);
+            return prop ? checkPropertyAccessibility(node, left, type, prop)
+                // In js files properties of unions are allowed in completion
+                : ts.isInJavaScriptFile(node) && (type.flags & 262144 /* Union */) !== 0 && type.types.some(function (elementType) { return isValidPropertyAccessWithType(node, left, propertyName, elementType); });
+        }
+        /**
+         * Return the symbol of the for-in variable declared or referenced by the given for-in statement.
+         */
+        function getForInVariableSymbol(node) {
+            var initializer = node.initializer;
+            if (initializer.kind === 233 /* VariableDeclarationList */) {
+                var variable = initializer.declarations[0];
+                if (variable && !ts.isBindingPattern(variable.name)) {
+                    return getSymbolOfNode(variable);
+                }
+            }
+            else if (initializer.kind === 71 /* Identifier */) {
+                return getResolvedSymbol(initializer);
+            }
+            return undefined;
+        }
+        /**
+         * Return true if the given type is considered to have numeric property names.
+         */
+        function hasNumericPropertyNames(type) {
+            return getIndexTypeOfType(type, 1 /* Number */) && !getIndexTypeOfType(type, 0 /* String */);
+        }
+        /**
+         * Return true if given node is an expression consisting of an identifier (possibly parenthesized)
+         * that references a for-in variable for an object with numeric property names.
+         */
+        function isForInVariableForNumericPropertyNames(expr) {
+            var e = ts.skipParentheses(expr);
+            if (e.kind === 71 /* Identifier */) {
+                var symbol = getResolvedSymbol(e);
+                if (symbol.flags & 3 /* Variable */) {
+                    var child = expr;
+                    var node = expr.parent;
+                    while (node) {
+                        if (node.kind === 221 /* ForInStatement */ &&
+                            child === node.statement &&
+                            getForInVariableSymbol(node) === symbol &&
+                            hasNumericPropertyNames(getTypeOfExpression(node.expression))) {
+                            return true;
+                        }
+                        child = node;
+                        node = node.parent;
+                    }
+                }
+            }
+            return false;
+        }
+        function checkIndexedAccess(node) {
+            var objectType = checkNonNullExpression(node.expression);
+            var indexExpression = node.argumentExpression;
+            if (!indexExpression) {
+                var sourceFile = ts.getSourceFileOfNode(node);
+                if (node.parent.kind === 188 /* NewExpression */ && node.parent.expression === node) {
+                    var start = ts.skipTrivia(sourceFile.text, node.expression.end);
+                    var end = node.end;
+                    grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead);
+                }
+                else {
+                    var start = node.end - "]".length;
+                    var end = node.end;
+                    grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.Expression_expected);
+                }
+                return errorType;
+            }
+            var indexType = isForInVariableForNumericPropertyNames(indexExpression) ? numberType : checkExpression(indexExpression);
+            if (objectType === errorType || objectType === silentNeverType) {
+                return objectType;
+            }
+            if (isConstEnumObjectType(objectType) && indexExpression.kind !== 9 /* StringLiteral */) {
+                error(indexExpression, ts.Diagnostics.A_const_enum_member_can_only_be_accessed_using_a_string_literal);
+                return errorType;
+            }
+            return checkIndexedAccessIndexType(getIndexedAccessType(objectType, indexType, node), node);
+        }
+        function checkThatExpressionIsProperSymbolReference(expression, expressionType, reportError) {
+            if (expressionType === errorType) {
+                // There is already an error, so no need to report one.
+                return false;
+            }
+            if (!ts.isWellKnownSymbolSyntactically(expression)) {
+                return false;
+            }
+            // Make sure the property type is the primitive symbol type
+            if ((expressionType.flags & 3072 /* ESSymbolLike */) === 0) {
+                if (reportError) {
+                    error(expression, ts.Diagnostics.A_computed_property_name_of_the_form_0_must_be_of_type_symbol, ts.getTextOfNode(expression));
+                }
+                return false;
+            }
+            // The name is Symbol.<someName>, so make sure Symbol actually resolves to the
+            // global Symbol object
+            var leftHandSide = expression.expression;
+            var leftHandSideSymbol = getResolvedSymbol(leftHandSide);
+            if (!leftHandSideSymbol) {
+                return false;
+            }
+            var globalESSymbol = getGlobalESSymbolConstructorSymbol(/*reportErrors*/ true);
+            if (!globalESSymbol) {
+                // Already errored when we tried to look up the symbol
+                return false;
+            }
+            if (leftHandSideSymbol !== globalESSymbol) {
+                if (reportError) {
+                    error(leftHandSide, ts.Diagnostics.Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object);
+                }
+                return false;
+            }
+            return true;
+        }
+        function callLikeExpressionMayHaveTypeArguments(node) {
+            // TODO: Also include tagged templates (https://github.com/Microsoft/TypeScript/issues/11947)
+            return ts.isCallOrNewExpression(node);
+        }
+        function resolveUntypedCall(node) {
+            if (callLikeExpressionMayHaveTypeArguments(node)) {
+                // Check type arguments even though we will give an error that untyped calls may not accept type arguments.
+                // This gets us diagnostics for the type arguments and marks them as referenced.
+                ts.forEach(node.typeArguments, checkSourceElement);
+            }
+            if (node.kind === 189 /* TaggedTemplateExpression */) {
+                checkExpression(node.template);
+            }
+            else if (node.kind !== 150 /* Decorator */) {
+                ts.forEach(node.arguments, function (argument) {
+                    checkExpression(argument);
+                });
+            }
+            return anySignature;
+        }
+        function resolveErrorCall(node) {
+            resolveUntypedCall(node);
+            return unknownSignature;
+        }
+        // Re-order candidate signatures into the result array. Assumes the result array to be empty.
+        // The candidate list orders groups in reverse, but within a group signatures are kept in declaration order
+        // A nit here is that we reorder only signatures that belong to the same symbol,
+        // so order how inherited signatures are processed is still preserved.
+        // interface A { (x: string): void }
+        // interface B extends A { (x: 'foo'): string }
+        // const b: B;
+        // b('foo') // <- here overloads should be processed as [(x:'foo'): string, (x: string): void]
+        function reorderCandidates(signatures, result) {
+            var lastParent;
+            var lastSymbol;
+            var cutoffIndex = 0;
+            var index;
+            var specializedIndex = -1;
+            var spliceIndex;
+            ts.Debug.assert(!result.length);
+            for (var _i = 0, signatures_4 = signatures; _i < signatures_4.length; _i++) {
+                var signature = signatures_4[_i];
+                var symbol = signature.declaration && getSymbolOfNode(signature.declaration);
+                var parent = signature.declaration && signature.declaration.parent;
+                if (!lastSymbol || symbol === lastSymbol) {
+                    if (lastParent && parent === lastParent) {
+                        index = index + 1;
+                    }
+                    else {
+                        lastParent = parent;
+                        index = cutoffIndex;
+                    }
+                }
+                else {
+                    // current declaration belongs to a different symbol
+                    // set cutoffIndex so re-orderings in the future won't change result set from 0 to cutoffIndex
+                    index = cutoffIndex = result.length;
+                    lastParent = parent;
+                }
+                lastSymbol = symbol;
+                // specialized signatures always need to be placed before non-specialized signatures regardless
+                // of the cutoff position; see GH#1133
+                if (signature.hasLiteralTypes) {
+                    specializedIndex++;
+                    spliceIndex = specializedIndex;
+                    // The cutoff index always needs to be greater than or equal to the specialized signature index
+                    // in order to prevent non-specialized signatures from being added before a specialized
+                    // signature.
+                    cutoffIndex++;
+                }
+                else {
+                    spliceIndex = index;
+                }
+                result.splice(spliceIndex, 0, signature);
+            }
+        }
+        function getSpreadArgumentIndex(args) {
+            for (var i = 0; i < args.length; i++) {
+                var arg = args[i];
+                if (arg && arg.kind === 204 /* SpreadElement */) {
+                    return i;
+                }
+            }
+            return -1;
+        }
+        function hasCorrectArity(node, args, signature, signatureHelpTrailingComma) {
+            if (signatureHelpTrailingComma === void 0) { signatureHelpTrailingComma = false; }
+            var argCount; // Apparent number of arguments we will have in this call
+            var typeArguments; // Type arguments (undefined if none)
+            var callIsIncomplete = false; // In incomplete call we want to be lenient when we have too few arguments
+            var spreadArgIndex = -1;
+            if (ts.isJsxOpeningLikeElement(node)) {
+                // The arity check will be done in "checkApplicableSignatureForJsxOpeningLikeElement".
+                return true;
+            }
+            if (node.kind === 189 /* TaggedTemplateExpression */) {
+                // Even if the call is incomplete, we'll have a missing expression as our last argument,
+                // so we can say the count is just the arg list length
+                argCount = args.length;
+                typeArguments = node.typeArguments;
+                if (node.template.kind === 202 /* TemplateExpression */) {
+                    // If a tagged template expression lacks a tail literal, the call is incomplete.
+                    // Specifically, a template only can end in a TemplateTail or a Missing literal.
+                    var lastSpan = ts.last(node.template.templateSpans); // we should always have at least one span.
+                    callIsIncomplete = ts.nodeIsMissing(lastSpan.literal) || !!lastSpan.literal.isUnterminated;
+                }
+                else {
+                    // If the template didn't end in a backtick, or its beginning occurred right prior to EOF,
+                    // then this might actually turn out to be a TemplateHead in the future;
+                    // so we consider the call to be incomplete.
+                    var templateLiteral = node.template;
+                    ts.Debug.assert(templateLiteral.kind === 13 /* NoSubstitutionTemplateLiteral */);
+                    callIsIncomplete = !!templateLiteral.isUnterminated;
+                }
+            }
+            else if (node.kind === 150 /* Decorator */) {
+                typeArguments = undefined;
+                argCount = getEffectiveArgumentCount(node, /*args*/ undefined, signature);
+            }
+            else {
+                if (!node.arguments) {
+                    // This only happens when we have something of the form: 'new C'
+                    ts.Debug.assert(node.kind === 188 /* NewExpression */);
+                    return signature.minArgumentCount === 0;
+                }
+                argCount = signatureHelpTrailingComma ? args.length + 1 : args.length;
+                // If we are missing the close parenthesis, the call is incomplete.
+                callIsIncomplete = node.arguments.end === node.end;
+                typeArguments = node.typeArguments;
+                spreadArgIndex = getSpreadArgumentIndex(args);
+            }
+            if (!hasCorrectTypeArgumentArity(signature, typeArguments)) {
+                return false;
+            }
+            // If a spread argument is present, check that it corresponds to a rest parameter or at least that it's in the valid range.
+            if (spreadArgIndex >= 0) {
+                return isRestParameterIndex(signature, spreadArgIndex) ||
+                    signature.minArgumentCount <= spreadArgIndex && spreadArgIndex < signature.parameters.length;
+            }
+            // Too many arguments implies incorrect arity.
+            if (!signature.hasRestParameter && argCount > signature.parameters.length) {
+                return false;
+            }
+            // If the call is incomplete, we should skip the lower bound check.
+            var hasEnoughArguments = argCount >= signature.minArgumentCount;
+            return callIsIncomplete || hasEnoughArguments;
+        }
+        function hasCorrectTypeArgumentArity(signature, typeArguments) {
+            // If the user supplied type arguments, but the number of type arguments does not match
+            // the declared number of type parameters, the call has an incorrect arity.
+            var numTypeParameters = ts.length(signature.typeParameters);
+            var minTypeArgumentCount = getMinTypeArgumentCount(signature.typeParameters);
+            return !typeArguments ||
+                (typeArguments.length >= minTypeArgumentCount && typeArguments.length <= numTypeParameters);
+        }
+        // If type has a single call signature and no other members, return that signature. Otherwise, return undefined.
+        function getSingleCallSignature(type) {
+            if (type.flags & 131072 /* Object */) {
+                var resolved = resolveStructuredTypeMembers(type);
+                if (resolved.callSignatures.length === 1 && resolved.constructSignatures.length === 0 &&
+                    resolved.properties.length === 0 && !resolved.stringIndexInfo && !resolved.numberIndexInfo) {
+                    return resolved.callSignatures[0];
+                }
+            }
+            return undefined;
+        }
+        // Instantiate a generic signature in the context of a non-generic signature (section 3.8.5 in TypeScript spec)
+        function instantiateSignatureInContextOf(signature, contextualSignature, contextualMapper, compareTypes) {
+            var context = createInferenceContext(signature.typeParameters, signature, 1 /* InferUnionTypes */, compareTypes);
+            forEachMatchingParameterType(contextualSignature, signature, function (source, target) {
+                // Type parameters from outer context referenced by source type are fixed by instantiation of the source type
+                inferTypes(context.inferences, instantiateType(source, contextualMapper || identityMapper), target);
+            });
+            if (!contextualMapper) {
+                inferTypes(context.inferences, getReturnTypeOfSignature(contextualSignature), getReturnTypeOfSignature(signature), 8 /* ReturnType */);
+            }
+            return getSignatureInstantiation(signature, getInferredTypes(context), ts.isInJavaScriptFile(contextualSignature.declaration));
+        }
+        function inferJsxTypeArguments(signature, node, context) {
+            // Skip context sensitive pass
+            var skipContextParamType = getTypeAtPosition(signature, 0);
+            var checkAttrTypeSkipContextSensitive = checkExpressionWithContextualType(node.attributes, skipContextParamType, identityMapper);
+            inferTypes(context.inferences, checkAttrTypeSkipContextSensitive, skipContextParamType);
+            // Standard pass
+            var paramType = getTypeAtPosition(signature, 0);
+            var checkAttrType = checkExpressionWithContextualType(node.attributes, paramType, context);
+            inferTypes(context.inferences, checkAttrType, paramType);
+            return getInferredTypes(context);
+        }
+        function inferTypeArguments(node, signature, args, excludeArgument, context) {
+            // Clear out all the inference results from the last time inferTypeArguments was called on this context
+            for (var _i = 0, _a = context.inferences; _i < _a.length; _i++) {
+                var inference = _a[_i];
+                // As an optimization, we don't have to clear (and later recompute) inferred types
+                // for type parameters that have already been fixed on the previous call to inferTypeArguments.
+                // It would be just as correct to reset all of them. But then we'd be repeating the same work
+                // for the type parameters that were fixed, namely the work done by getInferredType.
+                if (!inference.isFixed) {
+                    inference.inferredType = undefined;
+                }
+            }
+            // If a contextual type is available, infer from that type to the return type of the call expression. For
+            // example, given a 'function wrap<T, U>(cb: (x: T) => U): (x: T) => U' and a call expression
+            // 'let f: (x: string) => number = wrap(s => s.length)', we infer from the declared type of 'f' to the
+            // return type of 'wrap'.
+            if (node.kind !== 150 /* Decorator */) {
+                var contextualType = getContextualType(node);
+                if (contextualType) {
+                    // We clone the contextual mapper to avoid disturbing a resolution in progress for an
+                    // outer call expression. Effectively we just want a snapshot of whatever has been
+                    // inferred for any outer call expression so far.
+                    var instantiatedType = instantiateType(contextualType, cloneTypeMapper(getContextualMapper(node)));
+                    // If the contextual type is a generic function type with a single call signature, we
+                    // instantiate the type with its own type parameters and type arguments. This ensures that
+                    // the type parameters are not erased to type any during type inference such that they can
+                    // be inferred as actual types from the contextual type. For example:
+                    //   declare function arrayMap<T, U>(f: (x: T) => U): (a: T[]) => U[];
+                    //   const boxElements: <A>(a: A[]) => { value: A }[] = arrayMap(value => ({ value }));
+                    // Above, the type of the 'value' parameter is inferred to be 'A'.
+                    var contextualSignature = getSingleCallSignature(instantiatedType);
+                    var inferenceSourceType = contextualSignature && contextualSignature.typeParameters ?
+                        getOrCreateTypeFromSignature(getSignatureInstantiation(contextualSignature, contextualSignature.typeParameters, ts.isInJavaScriptFile(node))) :
+                        instantiatedType;
+                    var inferenceTargetType = getReturnTypeOfSignature(signature);
+                    // Inferences made from return types have lower priority than all other inferences.
+                    inferTypes(context.inferences, inferenceSourceType, inferenceTargetType, 8 /* ReturnType */);
+                }
+            }
+            var thisType = getThisTypeOfSignature(signature);
+            if (thisType) {
+                var thisArgumentNode = getThisArgumentOfCall(node);
+                var thisArgumentType = thisArgumentNode ? checkExpression(thisArgumentNode) : voidType;
+                inferTypes(context.inferences, thisArgumentType, thisType);
+            }
+            // We perform two passes over the arguments. In the first pass we infer from all arguments, but use
+            // wildcards for all context sensitive function expressions.
+            var argCount = getEffectiveArgumentCount(node, args, signature);
+            for (var i = 0; i < argCount; i++) {
+                var arg = getEffectiveArgument(node, args, i);
+                // If the effective argument is 'undefined', then it is an argument that is present but is synthetic.
+                if (arg === undefined || arg.kind !== 206 /* OmittedExpression */) {
+                    var paramType = getTypeAtPosition(signature, i);
+                    var argType = getEffectiveArgumentType(node, i);
+                    // If the effective argument type is 'undefined', there is no synthetic type
+                    // for the argument. In that case, we should check the argument.
+                    if (argType === undefined) {
+                        // For context sensitive arguments we pass the identityMapper, which is a signal to treat all
+                        // context sensitive function expressions as wildcards
+                        var mapper = excludeArgument && excludeArgument[i] !== undefined ? identityMapper : context;
+                        argType = checkExpressionWithContextualType(arg, paramType, mapper);
+                    }
+                    inferTypes(context.inferences, argType, paramType);
+                }
+            }
+            // In the second pass we visit only context sensitive arguments, and only those that aren't excluded, this
+            // time treating function expressions normally (which may cause previously inferred type arguments to be fixed
+            // as we construct types for contextually typed parameters)
+            // Decorators will not have `excludeArgument`, as their arguments cannot be contextually typed.
+            // Tagged template expressions will always have `undefined` for `excludeArgument[0]`.
+            if (excludeArgument) {
+                for (var i = 0; i < argCount; i++) {
+                    // No need to check for omitted args and template expressions, their exclusion value is always undefined
+                    if (excludeArgument[i] === false) {
+                        var arg = args[i];
+                        var paramType = getTypeAtPosition(signature, i);
+                        inferTypes(context.inferences, checkExpressionWithContextualType(arg, paramType, context), paramType);
+                    }
+                }
+            }
+            return getInferredTypes(context);
+        }
+        function checkTypeArguments(signature, typeArgumentNodes, reportErrors, headMessage) {
+            var isJavascript = ts.isInJavaScriptFile(signature.declaration);
+            var typeParameters = signature.typeParameters;
+            var typeArgumentTypes = fillMissingTypeArguments(ts.map(typeArgumentNodes, getTypeFromTypeNode), typeParameters, getMinTypeArgumentCount(typeParameters), isJavascript);
+            var mapper;
+            for (var i = 0; i < typeArgumentNodes.length; i++) {
+                ts.Debug.assert(typeParameters[i] !== undefined, "Should not call checkTypeArguments with too many type arguments");
+                var constraint = getConstraintOfTypeParameter(typeParameters[i]);
+                if (!constraint)
+                    continue;
+                var errorInfo = reportErrors && headMessage ? (function () { return ts.chainDiagnosticMessages(/*details*/ undefined, ts.Diagnostics.Type_0_does_not_satisfy_the_constraint_1); }) : undefined;
+                var typeArgumentHeadMessage = headMessage || ts.Diagnostics.Type_0_does_not_satisfy_the_constraint_1;
+                if (!mapper) {
+                    mapper = createTypeMapper(typeParameters, typeArgumentTypes);
+                }
+                var typeArgument = typeArgumentTypes[i];
+                if (!checkTypeAssignableTo(typeArgument, getTypeWithThisArgument(instantiateType(constraint, mapper), typeArgument), reportErrors ? typeArgumentNodes[i] : undefined, typeArgumentHeadMessage, errorInfo)) {
+                    return false;
+                }
+            }
+            return typeArgumentTypes;
+        }
+        /**
+         * Check if the given signature can possibly be a signature called by the JSX opening-like element.
+         * @param node a JSX opening-like element we are trying to figure its call signature
+         * @param signature a candidate signature we are trying whether it is a call signature
+         * @param relation a relationship to check parameter and argument type
+         * @param excludeArgument
+         */
+        function checkApplicableSignatureForJsxOpeningLikeElement(node, signature, relation) {
+            // JSX opening-like element has correct arity for stateless-function component if the one of the following condition is true:
+            //      1. callIsIncomplete
+            //      2. attributes property has same number of properties as the parameter object type.
+            //         We can figure that out by resolving attributes property and check number of properties in the resolved type
+            // If the call has correct arity, we will then check if the argument type and parameter type is assignable
+            var callIsIncomplete = node.attributes.end === node.end; // If we are missing the close "/>", the call is incomplete
+            if (callIsIncomplete) {
+                return true;
+            }
+            var headMessage = ts.Diagnostics.Argument_of_type_0_is_not_assignable_to_parameter_of_type_1;
+            // Stateless function components can have maximum of three arguments: "props", "context", and "updater".
+            // However "context" and "updater" are implicit and can't be specify by users. Only the first parameter, props,
+            // can be specified by users through attributes property.
+            var paramType = getTypeAtPosition(signature, 0);
+            var attributesType = checkExpressionWithContextualType(node.attributes, paramType, /*contextualMapper*/ undefined);
+            var argProperties = getPropertiesOfType(attributesType);
+            for (var _i = 0, argProperties_1 = argProperties; _i < argProperties_1.length; _i++) {
+                var arg = argProperties_1[_i];
+                if (!getPropertyOfType(paramType, arg.escapedName) && isUnhyphenatedJsxName(arg.escapedName)) {
+                    return false;
+                }
+            }
+            return checkTypeRelatedTo(attributesType, paramType, relation, /*errorNode*/ undefined, headMessage);
+        }
+        function checkApplicableSignature(node, args, signature, relation, excludeArgument, reportErrors) {
+            if (ts.isJsxOpeningLikeElement(node)) {
+                return checkApplicableSignatureForJsxOpeningLikeElement(node, signature, relation);
+            }
+            var thisType = getThisTypeOfSignature(signature);
+            if (thisType && thisType !== voidType && node.kind !== 188 /* NewExpression */) {
+                // If the called expression is not of the form `x.f` or `x["f"]`, then sourceType = voidType
+                // If the signature's 'this' type is voidType, then the check is skipped -- anything is compatible.
+                // If the expression is a new expression, then the check is skipped.
+                var thisArgumentNode = getThisArgumentOfCall(node);
+                var thisArgumentType = thisArgumentNode ? checkExpression(thisArgumentNode) : voidType;
+                var errorNode = reportErrors ? (thisArgumentNode || node) : undefined;
+                var headMessage_1 = ts.Diagnostics.The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1;
+                if (!checkTypeRelatedTo(thisArgumentType, thisType, relation, errorNode, headMessage_1)) {
+                    return false;
+                }
+            }
+            var headMessage = ts.Diagnostics.Argument_of_type_0_is_not_assignable_to_parameter_of_type_1;
+            var argCount = getEffectiveArgumentCount(node, args, signature);
+            for (var i = 0; i < argCount; i++) {
+                var arg = getEffectiveArgument(node, args, i);
+                // If the effective argument is 'undefined', then it is an argument that is present but is synthetic.
+                if (arg === undefined || arg.kind !== 206 /* OmittedExpression */) {
+                    // Check spread elements against rest type (from arity check we know spread argument corresponds to a rest parameter)
+                    var paramType = getTypeAtPosition(signature, i);
+                    // If the effective argument type is undefined, there is no synthetic type for the argument.
+                    // In that case, we should check the argument.
+                    var argType = getEffectiveArgumentType(node, i) ||
+                        checkExpressionWithContextualType(arg, paramType, excludeArgument && excludeArgument[i] ? identityMapper : undefined);
+                    // If one or more arguments are still excluded (as indicated by a non-null excludeArgument parameter),
+                    // we obtain the regular type of any object literal arguments because we may not have inferred complete
+                    // parameter types yet and therefore excess property checks may yield false positives (see #17041).
+                    var checkArgType = excludeArgument ? getRegularTypeOfObjectLiteral(argType) : argType;
+                    // Use argument expression as error location when reporting errors
+                    var errorNode = reportErrors ? getEffectiveArgumentErrorNode(node, i, arg) : undefined;
+                    if (!checkTypeRelatedTo(checkArgType, paramType, relation, errorNode, headMessage)) {
+                        return false;
+                    }
+                }
+            }
+            return true;
+        }
+        /**
+         * Returns the this argument in calls like x.f(...) and x[f](...). Undefined otherwise.
+         */
+        function getThisArgumentOfCall(node) {
+            if (node.kind === 187 /* CallExpression */) {
+                var callee = ts.skipOuterExpressions(node.expression);
+                if (callee.kind === 185 /* PropertyAccessExpression */ || callee.kind === 186 /* ElementAccessExpression */) {
+                    return callee.expression;
+                }
+            }
+        }
+        /**
+         * Returns the effective arguments for an expression that works like a function invocation.
+         *
+         * If 'node' is a CallExpression or a NewExpression, then its argument list is returned.
+         * If 'node' is a TaggedTemplateExpression, a new argument list is constructed from the substitution
+         *    expressions, where the first element of the list is `undefined`.
+         * If 'node' is a Decorator, the argument list will be `undefined`, and its arguments and types
+         *    will be supplied from calls to `getEffectiveArgumentCount` and `getEffectiveArgumentType`.
+         */
+        function getEffectiveCallArguments(node) {
+            if (node.kind === 189 /* TaggedTemplateExpression */) {
+                var template = node.template;
+                var args_4 = [undefined]; // TODO: GH#18217
+                if (template.kind === 202 /* TemplateExpression */) {
+                    ts.forEach(template.templateSpans, function (span) {
+                        args_4.push(span.expression);
+                    });
+                }
+                return args_4;
+            }
+            else if (node.kind === 150 /* Decorator */) {
+                // For a decorator, we return undefined as we will determine
+                // the number and types of arguments for a decorator using
+                // `getEffectiveArgumentCount` and `getEffectiveArgumentType` below.
+                return undefined;
+            }
+            else if (ts.isJsxOpeningLikeElement(node)) {
+                return node.attributes.properties.length > 0 ? [node.attributes] : ts.emptyArray;
+            }
+            else {
+                return node.arguments || ts.emptyArray;
+            }
+        }
+        /**
+         * Returns the effective argument count for a node that works like a function invocation.
+         * If 'node' is a Decorator, the number of arguments is derived from the decoration
+         *    target and the signature:
+         *    If 'node.target' is a class declaration or class expression, the effective argument
+         *       count is 1.
+         *    If 'node.target' is a parameter declaration, the effective argument count is 3.
+         *    If 'node.target' is a property declaration, the effective argument count is 2.
+         *    If 'node.target' is a method or accessor declaration, the effective argument count
+         *       is 3, although it can be 2 if the signature only accepts two arguments, allowing
+         *       us to match a property decorator.
+         * Otherwise, the argument count is the length of the 'args' array.
+         */
+        function getEffectiveArgumentCount(node, args, signature) {
+            if (node.kind === 150 /* Decorator */) {
+                switch (node.parent.kind) {
+                    case 235 /* ClassDeclaration */:
+                    case 205 /* ClassExpression */:
+                        // A class decorator will have one argument (see `ClassDecorator` in core.d.ts)
+                        return 1;
+                    case 152 /* PropertyDeclaration */:
+                        // A property declaration decorator will have two arguments (see
+                        // `PropertyDecorator` in core.d.ts)
+                        return 2;
+                    case 154 /* MethodDeclaration */:
+                    case 156 /* GetAccessor */:
+                    case 157 /* SetAccessor */:
+                        // A method or accessor declaration decorator will have two or three arguments (see
+                        // `PropertyDecorator` and `MethodDecorator` in core.d.ts)
+                        // If we are emitting decorators for ES3, we will only pass two arguments.
+                        if (languageVersion === 0 /* ES3 */) {
+                            return 2;
+                        }
+                        // If the method decorator signature only accepts a target and a key, we will only
+                        // type check those arguments.
+                        return signature.parameters.length >= 3 ? 3 : 2;
+                    case 149 /* Parameter */:
+                        // A parameter declaration decorator will have three arguments (see
+                        // `ParameterDecorator` in core.d.ts)
+                        return 3;
+                    default:
+                        return ts.Debug.fail();
+                }
+            }
+            else {
+                return args.length;
+            }
+        }
+        /**
+         * Returns the effective type of the first argument to a decorator.
+         * If 'node' is a class declaration or class expression, the effective argument type
+         *    is the type of the static side of the class.
+         * If 'node' is a parameter declaration, the effective argument type is either the type
+         *    of the static or instance side of the class for the parameter's parent method,
+         *    depending on whether the method is declared static.
+         *    For a constructor, the type is always the type of the static side of the class.
+         * If 'node' is a property, method, or accessor declaration, the effective argument
+         *    type is the type of the static or instance side of the parent class for class
+         *    element, depending on whether the element is declared static.
+         */
+        function getEffectiveDecoratorFirstArgumentType(node) {
+            // The first argument to a decorator is its `target`.
+            if (node.kind === 235 /* ClassDeclaration */) {
+                // For a class decorator, the `target` is the type of the class (e.g. the
+                // "static" or "constructor" side of the class)
+                var classSymbol = getSymbolOfNode(node);
+                return getTypeOfSymbol(classSymbol);
+            }
+            if (node.kind === 149 /* Parameter */) {
+                // For a parameter decorator, the `target` is the parent type of the
+                // parameter's containing method.
+                node = node.parent;
+                if (node.kind === 155 /* Constructor */) {
+                    var classSymbol = getSymbolOfNode(node);
+                    return getTypeOfSymbol(classSymbol);
+                }
+            }
+            if (node.kind === 152 /* PropertyDeclaration */ ||
+                node.kind === 154 /* MethodDeclaration */ ||
+                node.kind === 156 /* GetAccessor */ ||
+                node.kind === 157 /* SetAccessor */) {
+                // For a property or method decorator, the `target` is the
+                // "static"-side type of the parent of the member if the member is
+                // declared "static"; otherwise, it is the "instance"-side type of the
+                // parent of the member.
+                return getParentTypeOfClassElement(node);
+            }
+            ts.Debug.fail("Unsupported decorator target.");
+            return errorType;
+        }
+        /**
+         * Returns the effective type for the second argument to a decorator.
+         * If 'node' is a parameter, its effective argument type is one of the following:
+         *    If 'node.parent' is a constructor, the effective argument type is 'any', as we
+         *       will emit `undefined`.
+         *    If 'node.parent' is a member with an identifier, numeric, or string literal name,
+         *       the effective argument type will be a string literal type for the member name.
+         *    If 'node.parent' is a computed property name, the effective argument type will
+         *       either be a symbol type or the string type.
+         * If 'node' is a member with an identifier, numeric, or string literal name, the
+         *    effective argument type will be a string literal type for the member name.
+         * If 'node' is a computed property name, the effective argument type will either
+         *    be a symbol type or the string type.
+         * A class decorator does not have a second argument type.
+         */
+        function getEffectiveDecoratorSecondArgumentType(node) {
+            // The second argument to a decorator is its `propertyKey`
+            if (node.kind === 235 /* ClassDeclaration */) {
+                ts.Debug.fail("Class decorators should not have a second synthetic argument.");
+                return errorType;
+            }
+            if (node.kind === 149 /* Parameter */) {
+                node = node.parent;
+                if (node.kind === 155 /* Constructor */) {
+                    // For a constructor parameter decorator, the `propertyKey` will be `undefined`.
+                    return anyType;
+                }
+                // For a non-constructor parameter decorator, the `propertyKey` will be either
+                // a string or a symbol, based on the name of the parameter's containing method.
+            }
+            if (node.kind === 152 /* PropertyDeclaration */ ||
+                node.kind === 154 /* MethodDeclaration */ ||
+                node.kind === 156 /* GetAccessor */ ||
+                node.kind === 157 /* SetAccessor */) {
+                // The `propertyKey` for a property or method decorator will be a
+                // string literal type if the member name is an identifier, number, or string;
+                // otherwise, if the member name is a computed property name it will
+                // be either string or symbol.
+                var element = node;
+                var name = element.name;
+                switch (name.kind) {
+                    case 71 /* Identifier */:
+                        return getLiteralType(ts.idText(name));
+                    case 8 /* NumericLiteral */:
+                    case 9 /* StringLiteral */:
+                        return getLiteralType(name.text);
+                    case 147 /* ComputedPropertyName */:
+                        var nameType = checkComputedPropertyName(name);
+                        if (isTypeAssignableToKind(nameType, 3072 /* ESSymbolLike */)) {
+                            return nameType;
+                        }
+                        else {
+                            return stringType;
+                        }
+                    default:
+                        ts.Debug.fail("Unsupported property name.");
+                        return errorType;
+                }
+            }
+            ts.Debug.fail("Unsupported decorator target.");
+            return errorType;
+        }
+        /**
+         * Returns the effective argument type for the third argument to a decorator.
+         * If 'node' is a parameter, the effective argument type is the number type.
+         * If 'node' is a method or accessor, the effective argument type is a
+         *    `TypedPropertyDescriptor<T>` instantiated with the type of the member.
+         * Class and property decorators do not have a third effective argument.
+         */
+        function getEffectiveDecoratorThirdArgumentType(node) {
+            // The third argument to a decorator is either its `descriptor` for a method decorator
+            // or its `parameterIndex` for a parameter decorator
+            if (node.kind === 235 /* ClassDeclaration */) {
+                ts.Debug.fail("Class decorators should not have a third synthetic argument.");
+                return errorType;
+            }
+            if (node.kind === 149 /* Parameter */) {
+                // The `parameterIndex` for a parameter decorator is always a number
+                return numberType;
+            }
+            if (node.kind === 152 /* PropertyDeclaration */) {
+                ts.Debug.fail("Property decorators should not have a third synthetic argument.");
+                return errorType;
+            }
+            if (node.kind === 154 /* MethodDeclaration */ ||
+                node.kind === 156 /* GetAccessor */ ||
+                node.kind === 157 /* SetAccessor */) {
+                // The `descriptor` for a method decorator will be a `TypedPropertyDescriptor<T>`
+                // for the type of the member.
+                var propertyType = getTypeOfNode(node); // TODO: GH#18217
+                return createTypedPropertyDescriptorType(propertyType);
+            }
+            ts.Debug.fail("Unsupported decorator target.");
+            return errorType;
+        }
+        /**
+         * Returns the effective argument type for the provided argument to a decorator.
+         */
+        function getEffectiveDecoratorArgumentType(node, argIndex) {
+            if (argIndex === 0) {
+                return getEffectiveDecoratorFirstArgumentType(node.parent);
+            }
+            else if (argIndex === 1) {
+                return getEffectiveDecoratorSecondArgumentType(node.parent);
+            }
+            else if (argIndex === 2) {
+                return getEffectiveDecoratorThirdArgumentType(node.parent);
+            }
+            ts.Debug.fail("Decorators should not have a fourth synthetic argument.");
+            return errorType;
+        }
+        /**
+         * Gets the effective argument type for an argument in a call expression.
+         */
+        function getEffectiveArgumentType(node, argIndex) {
+            // Decorators provide special arguments, a tagged template expression provides
+            // a special first argument, and string literals get string literal types
+            // unless we're reporting errors
+            if (node.kind === 150 /* Decorator */) {
+                return getEffectiveDecoratorArgumentType(node, argIndex);
+            }
+            else if (argIndex === 0 && node.kind === 189 /* TaggedTemplateExpression */) {
+                return getGlobalTemplateStringsArrayType();
+            }
+            // This is not a synthetic argument, so we return 'undefined'
+            // to signal that the caller needs to check the argument.
+            return undefined;
+        }
+        /**
+         * Gets the effective argument expression for an argument in a call expression.
+         */
+        function getEffectiveArgument(node, args, argIndex) {
+            // For a decorator or the first argument of a tagged template expression we return undefined.
+            if (node.kind === 150 /* Decorator */ ||
+                (argIndex === 0 && node.kind === 189 /* TaggedTemplateExpression */)) {
+                return undefined;
+            }
+            return args[argIndex];
+        }
+        /**
+         * Gets the error node to use when reporting errors for an effective argument.
+         */
+        function getEffectiveArgumentErrorNode(node, argIndex, arg) {
+            if (node.kind === 150 /* Decorator */) {
+                // For a decorator, we use the expression of the decorator for error reporting.
+                return node.expression;
+            }
+            else if (argIndex === 0 && node.kind === 189 /* TaggedTemplateExpression */) {
+                // For a the first argument of a tagged template expression, we use the template of the tag for error reporting.
+                return node.template;
+            }
+            else {
+                return arg;
+            }
+        }
+        function getTypeArgumentArityError(node, signatures, typeArguments) {
+            var min = Infinity;
+            var max = -Infinity;
+            for (var _i = 0, signatures_5 = signatures; _i < signatures_5.length; _i++) {
+                var sig = signatures_5[_i];
+                min = Math.min(min, getMinTypeArgumentCount(sig.typeParameters));
+                max = Math.max(max, ts.length(sig.typeParameters));
+            }
+            var paramCount = min === max ? min : min + "-" + max;
+            return ts.createDiagnosticForNodeArray(ts.getSourceFileOfNode(node), typeArguments, ts.Diagnostics.Expected_0_type_arguments_but_got_1, paramCount, typeArguments.length);
+        }
+        function resolveCall(node, signatures, candidatesOutArray, fallbackError) {
+            var isTaggedTemplate = node.kind === 189 /* TaggedTemplateExpression */;
+            var isDecorator = node.kind === 150 /* Decorator */;
+            var isJsxOpeningOrSelfClosingElement = ts.isJsxOpeningLikeElement(node);
+            var typeArguments;
+            if (!isDecorator) {
+                typeArguments = node.typeArguments;
+                // We already perform checking on the type arguments on the class declaration itself.
+                if (isTaggedTemplate || isJsxOpeningOrSelfClosingElement || node.expression.kind !== 97 /* SuperKeyword */) {
+                    ts.forEach(typeArguments, checkSourceElement);
+                }
+            }
+            var candidates = candidatesOutArray || [];
+            // reorderCandidates fills up the candidates array directly
+            reorderCandidates(signatures, candidates);
+            if (!candidates.length) {
+                diagnostics.add(ts.createDiagnosticForNode(node, ts.Diagnostics.Call_target_does_not_contain_any_signatures));
+                return resolveErrorCall(node);
+            }
+            var args = getEffectiveCallArguments(node);
+            // The following applies to any value of 'excludeArgument[i]':
+            //    - true:      the argument at 'i' is susceptible to a one-time permanent contextual typing.
+            //    - undefined: the argument at 'i' is *not* susceptible to permanent contextual typing.
+            //    - false:     the argument at 'i' *was* and *has been* permanently contextually typed.
+            //
+            // The idea is that we will perform type argument inference & assignability checking once
+            // without using the susceptible parameters that are functions, and once more for each of those
+            // parameters, contextually typing each as we go along.
+            //
+            // For a tagged template, then the first argument be 'undefined' if necessary
+            // because it represents a TemplateStringsArray.
+            //
+            // For a decorator, no arguments are susceptible to contextual typing due to the fact
+            // decorators are applied to a declaration by the emitter, and not to an expression.
+            var isSingleNonGenericCandidate = candidates.length === 1 && !candidates[0].typeParameters;
+            var excludeArgument;
+            var excludeCount = 0;
+            if (!isDecorator && !isSingleNonGenericCandidate) {
+                // We do not need to call `getEffectiveArgumentCount` here as it only
+                // applies when calculating the number of arguments for a decorator.
+                for (var i = isTaggedTemplate ? 1 : 0; i < args.length; i++) {
+                    if (isContextSensitive(args[i])) {
+                        if (!excludeArgument) {
+                            excludeArgument = new Array(args.length);
+                        }
+                        excludeArgument[i] = true;
+                        excludeCount++;
+                    }
+                }
+            }
+            // The following variables are captured and modified by calls to chooseOverload.
+            // If overload resolution or type argument inference fails, we want to report the
+            // best error possible. The best error is one which says that an argument was not
+            // assignable to a parameter. This implies that everything else about the overload
+            // was fine. So if there is any overload that is only incorrect because of an
+            // argument, we will report an error on that one.
+            //
+            //     function foo(s: string): void;
+            //     function foo(n: number): void; // Report argument error on this overload
+            //     function foo(): void;
+            //     foo(true);
+            //
+            // If none of the overloads even made it that far, there are two possibilities.
+            // There was a problem with type arguments for some overload, in which case
+            // report an error on that. Or none of the overloads even had correct arity,
+            // in which case give an arity error.
+            //
+            //     function foo<T extends string>(x: T): void; // Report type argument error
+            //     function foo(): void;
+            //     foo<number>(0);
+            //
+            var candidateForArgumentError;
+            var candidateForTypeArgumentError;
+            var result;
+            // If we are in signature help, a trailing comma indicates that we intend to provide another argument,
+            // so we will only accept overloads with arity at least 1 higher than the current number of provided arguments.
+            var signatureHelpTrailingComma = candidatesOutArray && node.kind === 187 /* CallExpression */ && node.arguments.hasTrailingComma;
+            // Section 4.12.1:
+            // if the candidate list contains one or more signatures for which the type of each argument
+            // expression is a subtype of each corresponding parameter type, the return type of the first
+            // of those signatures becomes the return type of the function call.
+            // Otherwise, the return type of the first signature in the candidate list becomes the return
+            // type of the function call.
+            //
+            // Whether the call is an error is determined by assignability of the arguments. The subtype pass
+            // is just important for choosing the best signature. So in the case where there is only one
+            // signature, the subtype pass is useless. So skipping it is an optimization.
+            if (candidates.length > 1) {
+                result = chooseOverload(candidates, subtypeRelation, signatureHelpTrailingComma);
+            }
+            if (!result) {
+                result = chooseOverload(candidates, assignableRelation, signatureHelpTrailingComma);
+            }
+            if (result) {
+                return result;
+            }
+            // No signatures were applicable. Now report errors based on the last applicable signature with
+            // no arguments excluded from assignability checks.
+            // If candidate is undefined, it means that no candidates had a suitable arity. In that case,
+            // skip the checkApplicableSignature check.
+            if (candidateForArgumentError) {
+                if (isJsxOpeningOrSelfClosingElement) {
+                    // We do not report any error here because any error will be handled in "resolveCustomJsxElementAttributesType".
+                    return candidateForArgumentError;
+                }
+                // excludeArgument is undefined, in this case also equivalent to [undefined, undefined, ...]
+                // The importance of excludeArgument is to prevent us from typing function expression parameters
+                // in arguments too early. If possible, we'd like to only type them once we know the correct
+                // overload. However, this matters for the case where the call is correct. When the call is
+                // an error, we don't need to exclude any arguments, although it would cause no harm to do so.
+                checkApplicableSignature(node, args, candidateForArgumentError, assignableRelation, /*excludeArgument*/ undefined, /*reportErrors*/ true);
+            }
+            else if (candidateForTypeArgumentError) {
+                checkTypeArguments(candidateForTypeArgumentError, node.typeArguments, /*reportErrors*/ true, fallbackError);
+            }
+            else if (typeArguments && ts.every(signatures, function (sig) { return ts.length(sig.typeParameters) !== typeArguments.length; })) {
+                diagnostics.add(getTypeArgumentArityError(node, signatures, typeArguments));
+            }
+            else if (args) {
+                var min_1 = Number.POSITIVE_INFINITY;
+                var max = Number.NEGATIVE_INFINITY;
+                for (var _i = 0, signatures_6 = signatures; _i < signatures_6.length; _i++) {
+                    var sig = signatures_6[_i];
+                    min_1 = Math.min(min_1, sig.minArgumentCount);
+                    max = Math.max(max, sig.parameters.length);
+                }
+                var hasRestParameter_1 = ts.some(signatures, function (sig) { return sig.hasRestParameter; });
+                var hasSpreadArgument = getSpreadArgumentIndex(args) > -1;
+                var paramCount = hasRestParameter_1 ? min_1 :
+                    min_1 < max ? min_1 + "-" + max :
+                        min_1;
+                var argCount = args.length;
+                if (argCount <= max && hasSpreadArgument) {
+                    argCount--;
+                }
+                var error_1 = hasRestParameter_1 && hasSpreadArgument ? ts.Diagnostics.Expected_at_least_0_arguments_but_got_1_or_more :
+                    hasRestParameter_1 ? ts.Diagnostics.Expected_at_least_0_arguments_but_got_1 :
+                        hasSpreadArgument ? ts.Diagnostics.Expected_0_arguments_but_got_1_or_more :
+                            ts.Diagnostics.Expected_0_arguments_but_got_1;
+                diagnostics.add(ts.createDiagnosticForNode(node, error_1, paramCount, argCount));
+            }
+            else if (fallbackError) {
+                diagnostics.add(ts.createDiagnosticForNode(node, fallbackError));
+            }
+            // No signature was applicable. We have already reported the errors for the invalid signature.
+            // If this is a type resolution session, e.g. Language Service, try to get better information than anySignature.
+            // Pick the longest signature. This way we can get a contextual type for cases like:
+            //     declare function f(a: { xa: number; xb: number; }, b: number);
+            //     f({ |
+            // Also, use explicitly-supplied type arguments if they are provided, so we can get a contextual signature in cases like:
+            //     declare function f<T>(k: keyof T);
+            //     f<Foo>("
+            if (!produceDiagnostics) {
+                ts.Debug.assert(candidates.length > 0); // Else would have exited above.
+                var bestIndex = getLongestCandidateIndex(candidates, apparentArgumentCount === undefined ? args.length : apparentArgumentCount);
+                var candidate = candidates[bestIndex];
+                var typeParameters = candidate.typeParameters;
+                if (typeParameters && callLikeExpressionMayHaveTypeArguments(node) && node.typeArguments) {
+                    var typeArguments_1 = node.typeArguments.map(getTypeOfNode); // TODO: GH#18217
+                    while (typeArguments_1.length > typeParameters.length) {
+                        typeArguments_1.pop();
+                    }
+                    while (typeArguments_1.length < typeParameters.length) {
+                        typeArguments_1.push(getDefaultTypeArgumentType(ts.isInJavaScriptFile(node)));
+                    }
+                    var instantiated = createSignatureInstantiation(candidate, typeArguments_1);
+                    candidates[bestIndex] = instantiated;
+                    return instantiated;
+                }
+                return candidate;
+            }
+            return resolveErrorCall(node);
+            function chooseOverload(candidates, relation, signatureHelpTrailingComma) {
+                if (signatureHelpTrailingComma === void 0) { signatureHelpTrailingComma = false; }
+                candidateForArgumentError = undefined;
+                candidateForTypeArgumentError = undefined;
+                if (isSingleNonGenericCandidate) {
+                    var candidate = candidates[0];
+                    if (!hasCorrectArity(node, args, candidate, signatureHelpTrailingComma)) {
+                        return undefined;
+                    }
+                    if (!checkApplicableSignature(node, args, candidate, relation, excludeArgument, /*reportErrors*/ false)) {
+                        candidateForArgumentError = candidate;
+                        return undefined;
+                    }
+                    return candidate;
+                }
+                for (var candidateIndex = 0; candidateIndex < candidates.length; candidateIndex++) {
+                    var originalCandidate = candidates[candidateIndex];
+                    if (!hasCorrectArity(node, args, originalCandidate, signatureHelpTrailingComma)) {
+                        continue;
+                    }
+                    var candidate = void 0;
+                    var inferenceContext = originalCandidate.typeParameters ?
+                        createInferenceContext(originalCandidate.typeParameters, originalCandidate, /*flags*/ ts.isInJavaScriptFile(node) ? 4 /* AnyDefault */ : 0 /* None */) :
+                        undefined;
+                    while (true) {
+                        candidate = originalCandidate;
+                        if (candidate.typeParameters) {
+                            var typeArgumentTypes = void 0;
+                            if (typeArguments) {
+                                var typeArgumentResult = checkTypeArguments(candidate, typeArguments, /*reportErrors*/ false);
+                                if (typeArgumentResult) {
+                                    typeArgumentTypes = typeArgumentResult;
+                                }
+                                else {
+                                    candidateForTypeArgumentError = originalCandidate;
+                                    break;
+                                }
+                            }
+                            else {
+                                typeArgumentTypes = inferTypeArguments(node, candidate, args, excludeArgument, inferenceContext);
+                            }
+                            var isJavascript = ts.isInJavaScriptFile(candidate.declaration);
+                            candidate = getSignatureInstantiation(candidate, typeArgumentTypes, isJavascript);
+                        }
+                        if (!checkApplicableSignature(node, args, candidate, relation, excludeArgument, /*reportErrors*/ false)) {
+                            candidateForArgumentError = candidate;
+                            break;
+                        }
+                        if (excludeCount === 0) {
+                            candidates[candidateIndex] = candidate;
+                            return candidate;
+                        }
+                        excludeCount--;
+                        if (excludeCount > 0) {
+                            excludeArgument[excludeArgument.indexOf(/*value*/ true)] = false;
+                        }
+                        else {
+                            excludeArgument = undefined;
+                        }
+                    }
+                }
+                return undefined;
+            }
+        }
+        function getLongestCandidateIndex(candidates, argsCount) {
+            var maxParamsIndex = -1;
+            var maxParams = -1;
+            for (var i = 0; i < candidates.length; i++) {
+                var candidate = candidates[i];
+                if (candidate.hasRestParameter || candidate.parameters.length >= argsCount) {
+                    return i;
+                }
+                if (candidate.parameters.length > maxParams) {
+                    maxParams = candidate.parameters.length;
+                    maxParamsIndex = i;
+                }
+            }
+            return maxParamsIndex;
+        }
+        function resolveCallExpression(node, candidatesOutArray) {
+            if (node.expression.kind === 97 /* SuperKeyword */) {
+                var superType = checkSuperExpression(node.expression);
+                if (isTypeAny(superType)) {
+                    ts.forEach(node.arguments, checkExpresionNoReturn); // Still visit arguments so they get marked for visibility, etc
+                    return anySignature;
+                }
+                if (superType !== errorType) {
+                    // In super call, the candidate signatures are the matching arity signatures of the base constructor function instantiated
+                    // with the type arguments specified in the extends clause.
+                    var baseTypeNode = ts.getClassExtendsHeritageClauseElement(ts.getContainingClass(node));
+                    if (baseTypeNode) {
+                        var baseConstructors = getInstantiatedConstructorsForTypeArguments(superType, baseTypeNode.typeArguments, baseTypeNode);
+                        return resolveCall(node, baseConstructors, candidatesOutArray);
+                    }
+                }
+                return resolveUntypedCall(node);
+            }
+            var funcType = checkNonNullExpression(node.expression, ts.Diagnostics.Cannot_invoke_an_object_which_is_possibly_null, ts.Diagnostics.Cannot_invoke_an_object_which_is_possibly_undefined, ts.Diagnostics.Cannot_invoke_an_object_which_is_possibly_null_or_undefined);
+            if (funcType === silentNeverType) {
+                return silentNeverSignature;
+            }
+            var apparentType = getApparentType(funcType);
+            if (apparentType === errorType) {
+                // Another error has already been reported
+                return resolveErrorCall(node);
+            }
+            // Technically, this signatures list may be incomplete. We are taking the apparent type,
+            // but we are not including call signatures that may have been added to the Object or
+            // Function interface, since they have none by default. This is a bit of a leap of faith
+            // that the user will not add any.
+            var callSignatures = getSignaturesOfType(apparentType, 0 /* Call */);
+            var constructSignatures = getSignaturesOfType(apparentType, 1 /* Construct */);
+            // TS 1.0 Spec: 4.12
+            // In an untyped function call no TypeArgs are permitted, Args can be any argument list, no contextual
+            // types are provided for the argument expressions, and the result is always of type Any.
+            if (isUntypedFunctionCall(funcType, apparentType, callSignatures.length, constructSignatures.length)) {
+                // The unknownType indicates that an error already occurred (and was reported).  No
+                // need to report another error in this case.
+                if (funcType !== errorType && node.typeArguments) {
+                    error(node, ts.Diagnostics.Untyped_function_calls_may_not_accept_type_arguments);
+                }
+                return resolveUntypedCall(node);
+            }
+            // If FuncExpr's apparent type(section 3.8.1) is a function type, the call is a typed function call.
+            // TypeScript employs overload resolution in typed function calls in order to support functions
+            // with multiple call signatures.
+            if (!callSignatures.length) {
+                if (constructSignatures.length) {
+                    error(node, ts.Diagnostics.Value_of_type_0_is_not_callable_Did_you_mean_to_include_new, typeToString(funcType));
+                }
+                else {
+                    invocationError(node, apparentType, 0 /* Call */);
+                }
+                return resolveErrorCall(node);
+            }
+            return resolveCall(node, callSignatures, candidatesOutArray);
+        }
+        /**
+         * TS 1.0 spec: 4.12
+         * If FuncExpr is of type Any, or of an object type that has no call or construct signatures
+         * but is a subtype of the Function interface, the call is an untyped function call.
+         */
+        function isUntypedFunctionCall(funcType, apparentFuncType, numCallSignatures, numConstructSignatures) {
+            // We exclude union types because we may have a union of function types that happen to have no common signatures.
+            return isTypeAny(funcType) || isTypeAny(apparentFuncType) && funcType.flags & 65536 /* TypeParameter */ ||
+                !numCallSignatures && !numConstructSignatures && !(apparentFuncType.flags & (262144 /* Union */ | 32768 /* Never */)) && isTypeAssignableTo(funcType, globalFunctionType);
+        }
+        function resolveNewExpression(node, candidatesOutArray) {
+            if (node.arguments && languageVersion < 1 /* ES5 */) {
+                var spreadIndex = getSpreadArgumentIndex(node.arguments);
+                if (spreadIndex >= 0) {
+                    error(node.arguments[spreadIndex], ts.Diagnostics.Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher);
+                }
+            }
+            var expressionType = checkNonNullExpression(node.expression);
+            if (expressionType === silentNeverType) {
+                return silentNeverSignature;
+            }
+            // If expressionType's apparent type(section 3.8.1) is an object type with one or
+            // more construct signatures, the expression is processed in the same manner as a
+            // function call, but using the construct signatures as the initial set of candidate
+            // signatures for overload resolution. The result type of the function call becomes
+            // the result type of the operation.
+            expressionType = getApparentType(expressionType);
+            if (expressionType === errorType) {
+                // Another error has already been reported
+                return resolveErrorCall(node);
+            }
+            // TS 1.0 spec: 4.11
+            // If expressionType is of type Any, Args can be any argument
+            // list and the result of the operation is of type Any.
+            if (isTypeAny(expressionType)) {
+                if (node.typeArguments) {
+                    error(node, ts.Diagnostics.Untyped_function_calls_may_not_accept_type_arguments);
+                }
+                return resolveUntypedCall(node);
+            }
+            // Technically, this signatures list may be incomplete. We are taking the apparent type,
+            // but we are not including construct signatures that may have been added to the Object or
+            // Function interface, since they have none by default. This is a bit of a leap of faith
+            // that the user will not add any.
+            var constructSignatures = getSignaturesOfType(expressionType, 1 /* Construct */);
+            if (constructSignatures.length) {
+                if (!isConstructorAccessible(node, constructSignatures[0])) {
+                    return resolveErrorCall(node);
+                }
+                // If the expression is a class of abstract type, then it cannot be instantiated.
+                // Note, only class declarations can be declared abstract.
+                // In the case of a merged class-module or class-interface declaration,
+                // only the class declaration node will have the Abstract flag set.
+                var valueDecl = expressionType.symbol && ts.getClassLikeDeclarationOfSymbol(expressionType.symbol);
+                if (valueDecl && ts.hasModifier(valueDecl, 128 /* Abstract */)) {
+                    error(node, ts.Diagnostics.Cannot_create_an_instance_of_an_abstract_class);
+                    return resolveErrorCall(node);
+                }
+                return resolveCall(node, constructSignatures, candidatesOutArray);
+            }
+            // If expressionType's apparent type is an object type with no construct signatures but
+            // one or more call signatures, the expression is processed as a function call. A compile-time
+            // error occurs if the result of the function call is not Void. The type of the result of the
+            // operation is Any. It is an error to have a Void this type.
+            var callSignatures = getSignaturesOfType(expressionType, 0 /* Call */);
+            if (callSignatures.length) {
+                var signature = resolveCall(node, callSignatures, candidatesOutArray);
+                if (!isJavaScriptConstructor(signature.declaration) && getReturnTypeOfSignature(signature) !== voidType) {
+                    error(node, ts.Diagnostics.Only_a_void_function_can_be_called_with_the_new_keyword);
+                }
+                if (getThisTypeOfSignature(signature) === voidType) {
+                    error(node, ts.Diagnostics.A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void);
+                }
+                return signature;
+            }
+            invocationError(node, expressionType, 1 /* Construct */);
+            return resolveErrorCall(node);
+        }
+        function isConstructorAccessible(node, signature) {
+            if (!signature || !signature.declaration) {
+                return true;
+            }
+            var declaration = signature.declaration;
+            var modifiers = ts.getSelectedModifierFlags(declaration, 24 /* NonPublicAccessibilityModifier */);
+            // Public constructor is accessible.
+            if (!modifiers) {
+                return true;
+            }
+            var declaringClassDeclaration = ts.getClassLikeDeclarationOfSymbol(declaration.parent.symbol);
+            var declaringClass = getDeclaredTypeOfSymbol(declaration.parent.symbol);
+            // A private or protected constructor can only be instantiated within its own class (or a subclass, for protected)
+            if (!isNodeWithinClass(node, declaringClassDeclaration)) {
+                var containingClass = ts.getContainingClass(node);
+                if (containingClass) {
+                    var containingType = getTypeOfNode(containingClass);
+                    var baseTypes = getBaseTypes(containingType);
+                    while (baseTypes.length) {
+                        var baseType = baseTypes[0];
+                        if (modifiers & 16 /* Protected */ &&
+                            baseType.symbol === declaration.parent.symbol) {
+                            return true;
+                        }
+                        baseTypes = getBaseTypes(baseType);
+                    }
+                }
+                if (modifiers & 8 /* Private */) {
+                    error(node, ts.Diagnostics.Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration, typeToString(declaringClass));
+                }
+                if (modifiers & 16 /* Protected */) {
+                    error(node, ts.Diagnostics.Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration, typeToString(declaringClass));
+                }
+                return false;
+            }
+            return true;
+        }
+        function invocationError(node, apparentType, kind) {
+            error(node, kind === 0 /* Call */
+                ? ts.Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures
+                : ts.Diagnostics.Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature, typeToString(apparentType));
+            invocationErrorRecovery(apparentType, kind);
+        }
+        function invocationErrorRecovery(apparentType, kind) {
+            if (!apparentType.symbol) {
+                return;
+            }
+            var importNode = getSymbolLinks(apparentType.symbol).originatingImport;
+            // Create a diagnostic on the originating import if possible onto which we can attach a quickfix
+            //  An import call expression cannot be rewritten into another form to correct the error - the only solution is to use `.default` at the use-site
+            if (importNode && !ts.isImportCall(importNode)) {
+                var sigs = getSignaturesOfType(getTypeOfSymbol(getSymbolLinks(apparentType.symbol).target), kind);
+                if (!sigs || !sigs.length)
+                    return;
+                error(importNode, ts.Diagnostics.A_namespace_style_import_cannot_be_called_or_constructed_and_will_cause_a_failure_at_runtime);
+            }
+        }
+        function resolveTaggedTemplateExpression(node, candidatesOutArray) {
+            var tagType = checkExpression(node.tag);
+            var apparentType = getApparentType(tagType);
+            if (apparentType === errorType) {
+                // Another error has already been reported
+                return resolveErrorCall(node);
+            }
+            var callSignatures = getSignaturesOfType(apparentType, 0 /* Call */);
+            var constructSignatures = getSignaturesOfType(apparentType, 1 /* Construct */);
+            if (isUntypedFunctionCall(tagType, apparentType, callSignatures.length, constructSignatures.length)) {
+                return resolveUntypedCall(node);
+            }
+            if (!callSignatures.length) {
+                invocationError(node, apparentType, 0 /* Call */);
+                return resolveErrorCall(node);
+            }
+            return resolveCall(node, callSignatures, candidatesOutArray);
+        }
+        /**
+         * Gets the localized diagnostic head message to use for errors when resolving a decorator as a call expression.
+         */
+        function getDiagnosticHeadMessageForDecoratorResolution(node) {
+            switch (node.parent.kind) {
+                case 235 /* ClassDeclaration */:
+                case 205 /* ClassExpression */:
+                    return ts.Diagnostics.Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression;
+                case 149 /* Parameter */:
+                    return ts.Diagnostics.Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression;
+                case 152 /* PropertyDeclaration */:
+                    return ts.Diagnostics.Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression;
+                case 154 /* MethodDeclaration */:
+                case 156 /* GetAccessor */:
+                case 157 /* SetAccessor */:
+                    return ts.Diagnostics.Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression;
+                default:
+                    return ts.Debug.fail();
+            }
+        }
+        /**
+         * Resolves a decorator as if it were a call expression.
+         */
+        function resolveDecorator(node, candidatesOutArray) {
+            var funcType = checkExpression(node.expression);
+            var apparentType = getApparentType(funcType);
+            if (apparentType === errorType) {
+                return resolveErrorCall(node);
+            }
+            var callSignatures = getSignaturesOfType(apparentType, 0 /* Call */);
+            var constructSignatures = getSignaturesOfType(apparentType, 1 /* Construct */);
+            if (isUntypedFunctionCall(funcType, apparentType, callSignatures.length, constructSignatures.length)) {
+                return resolveUntypedCall(node);
+            }
+            if (isPotentiallyUncalledDecorator(node, callSignatures)) {
+                var nodeStr = ts.getTextOfNode(node.expression, /*includeTrivia*/ false);
+                error(node, ts.Diagnostics._0_accepts_too_few_arguments_to_be_used_as_a_decorator_here_Did_you_mean_to_call_it_first_and_write_0, nodeStr);
+                return resolveErrorCall(node);
+            }
+            var headMessage = getDiagnosticHeadMessageForDecoratorResolution(node);
+            if (!callSignatures.length) {
+                var errorInfo = ts.chainDiagnosticMessages(/*details*/ undefined, ts.Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures, typeToString(apparentType));
+                errorInfo = ts.chainDiagnosticMessages(errorInfo, headMessage);
+                diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(node, errorInfo));
+                invocationErrorRecovery(apparentType, 0 /* Call */);
+                return resolveErrorCall(node);
+            }
+            return resolveCall(node, callSignatures, candidatesOutArray, headMessage);
+        }
+        /**
+         * Sometimes, we have a decorator that could accept zero arguments,
+         * but is receiving too many arguments as part of the decorator invocation.
+         * In those cases, a user may have meant to *call* the expression before using it as a decorator.
+         */
+        function isPotentiallyUncalledDecorator(decorator, signatures) {
+            return signatures.length && ts.every(signatures, function (signature) {
+                return signature.minArgumentCount === 0 &&
+                    !signature.hasRestParameter &&
+                    signature.parameters.length < getEffectiveArgumentCount(decorator, /*args*/ undefined, signature);
+            });
+        }
+        /**
+         * This function is similar to getResolvedSignature but is exclusively for trying to resolve JSX stateless-function component.
+         * The main reason we have to use this function instead of getResolvedSignature because, the caller of this function will already check the type of openingLikeElement's tagName
+         * and pass the type as elementType. The elementType can not be a union (as such case should be handled by the caller of this function)
+         * Note: at this point, we are still not sure whether the opening-like element is a stateless function component or not.
+         * @param openingLikeElement an opening-like JSX element to try to resolve as JSX stateless function
+         * @param elementType an element type of the opneing-like element by checking opening-like element's tagname.
+         * @param candidatesOutArray an array of signature to be filled in by the function. It is passed by signature help in the language service;
+         *                           the function will fill it up with appropriate candidate signatures
+         */
+        function getResolvedJsxStatelessFunctionSignature(openingLikeElement, elementType, candidatesOutArray) {
+            ts.Debug.assert(!(elementType.flags & 262144 /* Union */));
+            var callSignatures = elementType && getSignaturesOfType(elementType, 0 /* Call */);
+            if (callSignatures && callSignatures.length > 0) {
+                return resolveCall(openingLikeElement, callSignatures, candidatesOutArray);
+            }
+            return undefined;
+        }
+        function resolveSignature(node, candidatesOutArray) {
+            switch (node.kind) {
+                case 187 /* CallExpression */:
+                    return resolveCallExpression(node, candidatesOutArray);
+                case 188 /* NewExpression */:
+                    return resolveNewExpression(node, candidatesOutArray);
+                case 189 /* TaggedTemplateExpression */:
+                    return resolveTaggedTemplateExpression(node, candidatesOutArray);
+                case 150 /* Decorator */:
+                    return resolveDecorator(node, candidatesOutArray);
+                case 257 /* JsxOpeningElement */:
+                case 256 /* JsxSelfClosingElement */:
+                    // This code-path is called by language service
+                    var exprTypes = checkExpression(node.tagName);
+                    return forEachType(exprTypes, function (exprType) {
+                        var sfcResult = getResolvedJsxStatelessFunctionSignature(node, exprType, candidatesOutArray);
+                        if (sfcResult && sfcResult !== unknownSignature) {
+                            return sfcResult;
+                        }
+                        var sigs = getInstantiatedJsxSignatures(node, exprType);
+                        if (candidatesOutArray && ts.length(sigs)) {
+                            candidatesOutArray.push.apply(candidatesOutArray, sigs);
+                        }
+                        return ts.length(sigs) ? sigs[0] : unknownSignature;
+                    }) || unknownSignature;
+            }
+            throw ts.Debug.assertNever(node, "Branch in 'resolveSignature' should be unreachable.");
+        }
+        /**
+         * Resolve a signature of a given call-like expression.
+         * @param node a call-like expression to try resolve a signature for
+         * @param candidatesOutArray an array of signature to be filled in by the function. It is passed by signature help in the language service;
+         *                           the function will fill it up with appropriate candidate signatures
+         * @return a signature of the call-like expression or undefined if one can't be found
+         */
+        function getResolvedSignature(node, candidatesOutArray) {
+            var links = getNodeLinks(node);
+            // If getResolvedSignature has already been called, we will have cached the resolvedSignature.
+            // However, it is possible that either candidatesOutArray was not passed in the first time,
+            // or that a different candidatesOutArray was passed in. Therefore, we need to redo the work
+            // to correctly fill the candidatesOutArray.
+            var cached = links.resolvedSignature;
+            if (cached && cached !== resolvingSignature && !candidatesOutArray) {
+                return cached;
+            }
+            links.resolvedSignature = resolvingSignature;
+            var result = resolveSignature(node, candidatesOutArray);
+            // If signature resolution originated in control flow type analysis (for example to compute the
+            // assigned type in a flow assignment) we don't cache the result as it may be based on temporary
+            // types from the control flow analysis.
+            links.resolvedSignature = flowLoopStart === flowLoopCount ? result : cached;
+            return result;
+        }
+        /**
+         * Indicates whether a declaration can be treated as a constructor in a JavaScript
+         * file.
+         */
+        function isJavaScriptConstructor(node) {
+            if (node && ts.isInJavaScriptFile(node)) {
+                // If the node has a @class tag, treat it like a constructor.
+                if (ts.getJSDocClassTag(node))
+                    return true;
+                // If the symbol of the node has members, treat it like a constructor.
+                var symbol = ts.isFunctionDeclaration(node) || ts.isFunctionExpression(node) ? getSymbolOfNode(node) :
+                    ts.isVariableDeclaration(node) && node.initializer && ts.isFunctionExpression(node.initializer) ? getSymbolOfNode(node.initializer) :
+                        undefined;
+                return !!symbol && symbol.members !== undefined;
+            }
+            return false;
+        }
+        function getJavaScriptClassType(symbol) {
+            var inferred;
+            if (isJavaScriptConstructor(symbol.valueDeclaration)) {
+                inferred = getInferredClassType(symbol);
+            }
+            var assigned = getAssignedClassType(symbol);
+            var valueType = getTypeOfSymbol(symbol);
+            if (valueType.symbol && !isInferredClassType(valueType) && isJavaScriptConstructor(valueType.symbol.valueDeclaration)) {
+                inferred = getInferredClassType(valueType.symbol);
+            }
+            return assigned && inferred ?
+                getIntersectionType([inferred, assigned]) :
+                assigned || inferred;
+        }
+        function getAssignedClassType(symbol) {
+            var decl = symbol.valueDeclaration;
+            var assignmentSymbol = decl && decl.parent &&
+                (ts.isBinaryExpression(decl.parent) && getSymbolOfNode(decl.parent.left) ||
+                    ts.isVariableDeclaration(decl.parent) && getSymbolOfNode(decl.parent));
+            if (assignmentSymbol) {
+                var prototype = ts.forEach(assignmentSymbol.declarations, getAssignedJavascriptPrototype);
+                if (prototype) {
+                    return checkExpression(prototype);
+                }
+            }
+        }
+        function getAssignedJavascriptPrototype(node) {
+            if (!node.parent) {
+                return false;
+            }
+            var parent = node.parent;
+            while (parent && parent.kind === 185 /* PropertyAccessExpression */) {
+                parent = parent.parent;
+            }
+            if (parent && ts.isBinaryExpression(parent) && ts.isPrototypeAccess(parent.left) && parent.operatorToken.kind === 58 /* EqualsToken */) {
+                var right = ts.getInitializerOfBinaryExpression(parent);
+                return ts.isObjectLiteralExpression(right) && right;
+            }
+        }
+        function getInferredClassType(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.inferredClassType) {
+                links.inferredClassType = createAnonymousType(symbol, getMembersOfSymbol(symbol) || emptySymbols, ts.emptyArray, ts.emptyArray, /*stringIndexType*/ undefined, /*numberIndexType*/ undefined);
+            }
+            return links.inferredClassType;
+        }
+        function isInferredClassType(type) {
+            return type.symbol
+                && ts.getObjectFlags(type) & 16 /* Anonymous */
+                && getSymbolLinks(type.symbol).inferredClassType === type;
+        }
+        /**
+         * Syntactically and semantically checks a call or new expression.
+         * @param node The call/new expression to be checked.
+         * @returns On success, the expression's signature's return type. On failure, anyType.
+         */
+        function checkCallExpression(node) {
+            if (!checkGrammarTypeArguments(node, node.typeArguments))
+                checkGrammarArguments(node.arguments);
+            var signature = getResolvedSignature(node);
+            if (node.expression.kind === 97 /* SuperKeyword */) {
+                return voidType;
+            }
+            if (node.kind === 188 /* NewExpression */) {
+                var declaration = signature.declaration;
+                if (declaration &&
+                    declaration.kind !== 155 /* Constructor */ &&
+                    declaration.kind !== 159 /* ConstructSignature */ &&
+                    declaration.kind !== 164 /* ConstructorType */ &&
+                    !ts.isJSDocConstructSignature(declaration)) {
+                    // When resolved signature is a call signature (and not a construct signature) the result type is any, unless
+                    // the declaring function had members created through 'x.prototype.y = expr' or 'this.y = expr' psuedodeclarations
+                    // in a JS file
+                    // Note:JS inferred classes might come from a variable declaration instead of a function declaration.
+                    // In this case, using getResolvedSymbol directly is required to avoid losing the members from the declaration.
+                    var funcSymbol = checkExpression(node.expression).symbol;
+                    if (!funcSymbol && node.expression.kind === 71 /* Identifier */) {
+                        funcSymbol = getResolvedSymbol(node.expression);
+                    }
+                    var type = funcSymbol && getJavaScriptClassType(funcSymbol);
+                    if (type) {
+                        return signature.target ? instantiateType(type, signature.mapper) : type;
+                    }
+                    if (noImplicitAny) {
+                        error(node, ts.Diagnostics.new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type);
+                    }
+                    return anyType;
+                }
+            }
+            // In JavaScript files, calls to any identifier 'require' are treated as external module imports
+            if (ts.isInJavaScriptFile(node) && isCommonJsRequire(node)) {
+                return resolveExternalModuleTypeByLiteral(node.arguments[0]);
+            }
+            var returnType = getReturnTypeOfSignature(signature);
+            // Treat any call to the global 'Symbol' function that is part of a const variable or readonly property
+            // as a fresh unique symbol literal type.
+            if (returnType.flags & 3072 /* ESSymbolLike */ && isSymbolOrSymbolForCall(node)) {
+                return getESSymbolLikeTypeForNode(ts.walkUpParenthesizedExpressions(node.parent));
+            }
+            var jsAssignmentType;
+            if (ts.isInJavaScriptFile(node)) {
+                var decl = ts.getDeclarationOfJSInitializer(node);
+                if (decl) {
+                    var jsSymbol = getSymbolOfNode(decl);
+                    if (jsSymbol && ts.hasEntries(jsSymbol.exports)) {
+                        jsAssignmentType = createAnonymousType(jsSymbol, jsSymbol.exports, ts.emptyArray, ts.emptyArray, jsObjectLiteralIndexInfo, undefined);
+                    }
+                }
+            }
+            return jsAssignmentType ? getIntersectionType([returnType, jsAssignmentType]) : returnType;
+        }
+        function isSymbolOrSymbolForCall(node) {
+            if (!ts.isCallExpression(node))
+                return false;
+            var left = node.expression;
+            if (ts.isPropertyAccessExpression(left) && left.name.escapedText === "for") {
+                left = left.expression;
+            }
+            if (!ts.isIdentifier(left) || left.escapedText !== "Symbol") {
+                return false;
+            }
+            // make sure `Symbol` is the global symbol
+            var globalESSymbol = getGlobalESSymbolConstructorSymbol(/*reportErrors*/ false);
+            if (!globalESSymbol) {
+                return false;
+            }
+            return globalESSymbol === resolveName(left, "Symbol", 67216319 /* Value */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined, /*isUse*/ false);
+        }
+        function checkImportCallExpression(node) {
+            // Check grammar of dynamic import
+            if (!checkGrammarArguments(node.arguments))
+                checkGrammarImportCallExpression(node);
+            if (node.arguments.length === 0) {
+                return createPromiseReturnType(node, anyType);
+            }
+            var specifier = node.arguments[0];
+            var specifierType = checkExpressionCached(specifier);
+            // Even though multiple arugments is grammatically incorrect, type-check extra arguments for completion
+            for (var i = 1; i < node.arguments.length; ++i) {
+                checkExpressionCached(node.arguments[i]);
+            }
+            if (specifierType.flags & 8192 /* Undefined */ || specifierType.flags & 16384 /* Null */ || !isTypeAssignableTo(specifierType, stringType)) {
+                error(specifier, ts.Diagnostics.Dynamic_import_s_specifier_must_be_of_type_string_but_here_has_type_0, typeToString(specifierType));
+            }
+            // resolveExternalModuleName will return undefined if the moduleReferenceExpression is not a string literal
+            var moduleSymbol = resolveExternalModuleName(node, specifier);
+            if (moduleSymbol) {
+                var esModuleSymbol = resolveESModuleSymbol(moduleSymbol, specifier, /*dontRecursivelyResolve*/ true);
+                if (esModuleSymbol) {
+                    return createPromiseReturnType(node, getTypeWithSyntheticDefaultImportType(getTypeOfSymbol(esModuleSymbol), esModuleSymbol, moduleSymbol));
+                }
+            }
+            return createPromiseReturnType(node, anyType);
+        }
+        function getTypeWithSyntheticDefaultImportType(type, symbol, originalSymbol) {
+            if (allowSyntheticDefaultImports && type && type !== errorType) {
+                var synthType = type;
+                if (!synthType.syntheticType) {
+                    var file = ts.find(originalSymbol.declarations, ts.isSourceFile);
+                    var hasSyntheticDefault = canHaveSyntheticDefault(file, originalSymbol, /*dontResolveAlias*/ false);
+                    if (hasSyntheticDefault) {
+                        var memberTable = ts.createSymbolTable();
+                        var newSymbol = createSymbol(2097152 /* Alias */, "default" /* Default */);
+                        newSymbol.target = resolveSymbol(symbol);
+                        memberTable.set("default" /* Default */, newSymbol);
+                        var anonymousSymbol = createSymbol(2048 /* TypeLiteral */, "__type" /* Type */);
+                        var defaultContainingObject = createAnonymousType(anonymousSymbol, memberTable, ts.emptyArray, ts.emptyArray, /*stringIndexInfo*/ undefined, /*numberIndexInfo*/ undefined);
+                        anonymousSymbol.type = defaultContainingObject;
+                        synthType.syntheticType = isValidSpreadType(type) ? getSpreadType(type, defaultContainingObject, anonymousSymbol, /*typeFLags*/ 0, /*objectFlags*/ 0) : defaultContainingObject;
+                    }
+                    else {
+                        synthType.syntheticType = type;
+                    }
+                }
+                return synthType.syntheticType;
+            }
+            return type;
+        }
+        function isCommonJsRequire(node) {
+            if (!ts.isRequireCall(node, /*checkArgumentIsStringLiteralLike*/ true)) {
+                return false;
+            }
+            // Make sure require is not a local function
+            if (!ts.isIdentifier(node.expression))
+                return ts.Debug.fail();
+            var resolvedRequire = resolveName(node.expression, node.expression.escapedText, 67216319 /* Value */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined, /*isUse*/ true); // TODO: GH#18217
+            if (resolvedRequire === requireSymbol) {
+                return true;
+            }
+            // project includes symbol named 'require' - make sure that it is ambient and local non-alias
+            if (resolvedRequire.flags & 2097152 /* Alias */) {
+                return false;
+            }
+            var targetDeclarationKind = resolvedRequire.flags & 16 /* Function */
+                ? 234 /* FunctionDeclaration */
+                : resolvedRequire.flags & 3 /* Variable */
+                    ? 232 /* VariableDeclaration */
+                    : 0 /* Unknown */;
+            if (targetDeclarationKind !== 0 /* Unknown */) {
+                var decl = ts.getDeclarationOfKind(resolvedRequire, targetDeclarationKind);
+                // function/variable declaration should be ambient
+                return !!decl && !!(decl.flags & 4194304 /* Ambient */);
+            }
+            return false;
+        }
+        function checkTaggedTemplateExpression(node) {
+            checkGrammarTypeArguments(node, node.typeArguments);
+            if (languageVersion < 2 /* ES2015 */) {
+                checkExternalEmitHelpers(node, 65536 /* MakeTemplateObject */);
+            }
+            return getReturnTypeOfSignature(getResolvedSignature(node));
+        }
+        function checkAssertion(node) {
+            return checkAssertionWorker(node, node.type, node.expression);
+        }
+        function checkAssertionWorker(errNode, type, expression, checkMode) {
+            var exprType = getRegularTypeOfObjectLiteral(getBaseTypeOfLiteralType(checkExpression(expression, checkMode)));
+            checkSourceElement(type);
+            var targetType = getTypeFromTypeNode(type);
+            if (produceDiagnostics && targetType !== errorType) {
+                var widenedType = getWidenedType(exprType);
+                if (!isTypeComparableTo(targetType, widenedType)) {
+                    checkTypeComparableTo(exprType, targetType, errNode, ts.Diagnostics.Type_0_cannot_be_converted_to_type_1);
+                }
+            }
+            return targetType;
+        }
+        function checkNonNullAssertion(node) {
+            return getNonNullableType(checkExpression(node.expression));
+        }
+        function checkMetaProperty(node) {
+            checkGrammarMetaProperty(node);
+            if (node.keywordToken === 94 /* NewKeyword */) {
+                return checkNewTargetMetaProperty(node);
+            }
+            if (node.keywordToken === 91 /* ImportKeyword */) {
+                return checkImportMetaProperty(node);
+            }
+            return ts.Debug.assertNever(node.keywordToken);
+        }
+        function checkNewTargetMetaProperty(node) {
+            var container = ts.getNewTargetContainer(node);
+            if (!container) {
+                error(node, ts.Diagnostics.Meta_property_0_is_only_allowed_in_the_body_of_a_function_declaration_function_expression_or_constructor, "new.target");
+                return errorType;
+            }
+            else if (container.kind === 155 /* Constructor */) {
+                var symbol = getSymbolOfNode(container.parent);
+                return getTypeOfSymbol(symbol);
+            }
+            else {
+                var symbol = getSymbolOfNode(container);
+                return getTypeOfSymbol(symbol);
+            }
+        }
+        function checkImportMetaProperty(node) {
+            if (languageVersion < 6 /* ESNext */ || moduleKind < ts.ModuleKind.ESNext) {
+                error(node, ts.Diagnostics.The_import_meta_meta_property_is_only_allowed_using_ESNext_for_the_target_and_module_compiler_options);
+            }
+            var file = ts.getSourceFileOfNode(node);
+            ts.Debug.assert(!!(file.flags & 1048576 /* PossiblyContainsImportMeta */), "Containing file is missing import meta node flag.");
+            ts.Debug.assert(!!file.externalModuleIndicator, "Containing file should be a module.");
+            return node.name.escapedText === "meta" ? getGlobalImportMetaType() : errorType;
+        }
+        function getTypeOfParameter(symbol) {
+            var type = getTypeOfSymbol(symbol);
+            if (strictNullChecks) {
+                var declaration = symbol.valueDeclaration;
+                if (declaration && ts.hasInitializer(declaration)) {
+                    return getOptionalType(type);
+                }
+            }
+            return type;
+        }
+        function getTypeAtPosition(signature, pos) {
+            return signature.hasRestParameter ?
+                pos < signature.parameters.length - 1 ? getTypeOfParameter(signature.parameters[pos]) : getRestTypeOfSignature(signature) :
+                pos < signature.parameters.length ? getTypeOfParameter(signature.parameters[pos]) : anyType;
+        }
+        function getTypeOfFirstParameterOfSignature(signature) {
+            return getTypeOfFirstParameterOfSignatureWithFallback(signature, neverType);
+        }
+        function getTypeOfFirstParameterOfSignatureWithFallback(signature, fallbackType) {
+            return signature.parameters.length > 0 ? getTypeAtPosition(signature, 0) : fallbackType;
+        }
+        function inferFromAnnotatedParameters(signature, context, mapper) {
+            var len = signature.parameters.length - (signature.hasRestParameter ? 1 : 0);
+            for (var i = 0; i < len; i++) {
+                var declaration = signature.parameters[i].valueDeclaration;
+                if (declaration.type) {
+                    var typeNode = ts.getEffectiveTypeAnnotationNode(declaration);
+                    if (typeNode) {
+                        inferTypes(mapper.inferences, getTypeFromTypeNode(typeNode), getTypeAtPosition(context, i));
+                    }
+                }
+            }
+        }
+        function assignContextualParameterTypes(signature, context) {
+            signature.typeParameters = context.typeParameters;
+            if (context.thisParameter) {
+                var parameter = signature.thisParameter;
+                if (!parameter || parameter.valueDeclaration && !parameter.valueDeclaration.type) {
+                    if (!parameter) {
+                        signature.thisParameter = createSymbolWithType(context.thisParameter, /*type*/ undefined);
+                    }
+                    assignTypeToParameterAndFixTypeParameters(signature.thisParameter, getTypeOfSymbol(context.thisParameter));
+                }
+            }
+            var len = signature.parameters.length - (signature.hasRestParameter ? 1 : 0);
+            for (var i = 0; i < len; i++) {
+                var parameter = signature.parameters[i];
+                if (!ts.getEffectiveTypeAnnotationNode(parameter.valueDeclaration)) {
+                    var contextualParameterType = getTypeAtPosition(context, i);
+                    assignTypeToParameterAndFixTypeParameters(parameter, contextualParameterType);
+                }
+            }
+            if (signature.hasRestParameter && isRestParameterIndex(context, signature.parameters.length - 1)) {
+                // parameter might be a transient symbol generated by use of `arguments` in the function body.
+                var parameter = ts.last(signature.parameters);
+                if (isTransientSymbol(parameter) || !ts.getEffectiveTypeAnnotationNode(parameter.valueDeclaration)) {
+                    var contextualParameterType = getTypeOfSymbol(ts.last(context.parameters));
+                    assignTypeToParameterAndFixTypeParameters(parameter, contextualParameterType);
+                }
+            }
+        }
+        // When contextual typing assigns a type to a parameter that contains a binding pattern, we also need to push
+        // the destructured type into the contained binding elements.
+        function assignBindingElementTypes(pattern) {
+            for (var _i = 0, _a = pattern.elements; _i < _a.length; _i++) {
+                var element = _a[_i];
+                if (!ts.isOmittedExpression(element)) {
+                    if (element.name.kind === 71 /* Identifier */) {
+                        getSymbolLinks(getSymbolOfNode(element)).type = getTypeForBindingElement(element);
+                    }
+                    else {
+                        assignBindingElementTypes(element.name);
+                    }
+                }
+            }
+        }
+        function assignTypeToParameterAndFixTypeParameters(parameter, contextualType) {
+            var links = getSymbolLinks(parameter);
+            if (!links.type) {
+                links.type = contextualType;
+                var decl = parameter.valueDeclaration;
+                if (decl.name.kind !== 71 /* Identifier */) {
+                    // if inference didn't come up with anything but {}, fall back to the binding pattern if present.
+                    if (links.type === emptyObjectType) {
+                        links.type = getTypeFromBindingPattern(decl.name);
+                    }
+                    assignBindingElementTypes(decl.name);
+                }
+            }
+        }
+        function createPromiseType(promisedType) {
+            // creates a `Promise<T>` type where `T` is the promisedType argument
+            var globalPromiseType = getGlobalPromiseType(/*reportErrors*/ true);
+            if (globalPromiseType !== emptyGenericType) {
+                // if the promised type is itself a promise, get the underlying type; otherwise, fallback to the promised type
+                promisedType = getAwaitedType(promisedType) || emptyObjectType;
+                return createTypeReference(globalPromiseType, [promisedType]);
+            }
+            return emptyObjectType;
+        }
+        function createPromiseReturnType(func, promisedType) {
+            var promiseType = createPromiseType(promisedType);
+            if (promiseType === emptyObjectType) {
+                error(func, ts.isImportCall(func) ?
+                    ts.Diagnostics.A_dynamic_import_call_returns_a_Promise_Make_sure_you_have_a_declaration_for_Promise_or_include_ES2015_in_your_lib_option :
+                    ts.Diagnostics.An_async_function_or_method_must_return_a_Promise_Make_sure_you_have_a_declaration_for_Promise_or_include_ES2015_in_your_lib_option);
+                return errorType;
+            }
+            else if (!getGlobalPromiseConstructorSymbol(/*reportErrors*/ true)) {
+                error(func, ts.isImportCall(func) ?
+                    ts.Diagnostics.A_dynamic_import_call_in_ES5_SlashES3_requires_the_Promise_constructor_Make_sure_you_have_a_declaration_for_the_Promise_constructor_or_include_ES2015_in_your_lib_option :
+                    ts.Diagnostics.An_async_function_or_method_in_ES5_SlashES3_requires_the_Promise_constructor_Make_sure_you_have_a_declaration_for_the_Promise_constructor_or_include_ES2015_in_your_lib_option);
+            }
+            return promiseType;
+        }
+        function getReturnTypeFromBody(func, checkMode) {
+            if (!func.body) {
+                return errorType;
+            }
+            var functionFlags = ts.getFunctionFlags(func);
+            var type;
+            if (func.body.kind !== 213 /* Block */) {
+                type = checkExpressionCached(func.body, checkMode);
+                if (functionFlags & 2 /* Async */) {
+                    // From within an async function you can return either a non-promise value or a promise. Any
+                    // Promise/A+ compatible implementation will always assimilate any foreign promise, so the
+                    // return type of the body should be unwrapped to its awaited type, which we will wrap in
+                    // the native Promise<T> type later in this function.
+                    type = checkAwaitedType(type, /*errorNode*/ func, ts.Diagnostics.The_return_type_of_an_async_function_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member);
+                }
+            }
+            else {
+                var types = checkAndAggregateReturnExpressionTypes(func, checkMode);
+                if (functionFlags & 1 /* Generator */) { // Generator or AsyncGenerator function
+                    types = ts.concatenate(checkAndAggregateYieldOperandTypes(func, checkMode), types);
+                    if (!types || types.length === 0) {
+                        var iterableIteratorAny = functionFlags & 2 /* Async */
+                            ? createAsyncIterableIteratorType(anyType) // AsyncGenerator function
+                            : createIterableIteratorType(anyType); // Generator function
+                        if (noImplicitAny) {
+                            error(func.asteriskToken, ts.Diagnostics.Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_type, typeToString(iterableIteratorAny));
+                        }
+                        return iterableIteratorAny;
+                    }
+                }
+                else {
+                    if (!types) {
+                        // For an async function, the return type will not be never, but rather a Promise for never.
+                        return functionFlags & 2 /* Async */
+                            ? createPromiseReturnType(func, neverType) // Async function
+                            : neverType; // Normal function
+                    }
+                    if (types.length === 0) {
+                        // For an async function, the return type will not be void, but rather a Promise for void.
+                        return functionFlags & 2 /* Async */
+                            ? createPromiseReturnType(func, voidType) // Async function
+                            : voidType; // Normal function
+                    }
+                }
+                // Return a union of the return expression types.
+                type = getUnionType(types, 2 /* Subtype */);
+            }
+            var contextualSignature = getContextualSignatureForFunctionLikeDeclaration(func);
+            if (!contextualSignature) {
+                reportErrorsFromWidening(func, type);
+            }
+            if (isUnitType(type)) {
+                var contextualType = !contextualSignature ? undefined :
+                    contextualSignature === getSignatureFromDeclaration(func) ? type :
+                        getReturnTypeOfSignature(contextualSignature);
+                if (contextualType) {
+                    switch (functionFlags & 3 /* AsyncGenerator */) {
+                        case 3 /* AsyncGenerator */:
+                            contextualType = getIteratedTypeOfGenerator(contextualType, /*isAsyncGenerator*/ true);
+                            break;
+                        case 1 /* Generator */:
+                            contextualType = getIteratedTypeOfGenerator(contextualType, /*isAsyncGenerator*/ false);
+                            break;
+                        case 2 /* Async */:
+                            contextualType = getPromisedTypeOfPromise(contextualType);
+                            break;
+                    }
+                }
+                type = getWidenedLiteralLikeTypeForContextualType(type, contextualType);
+            }
+            var widenedType = getWidenedType(type);
+            switch (functionFlags & 3 /* AsyncGenerator */) {
+                case 3 /* AsyncGenerator */:
+                    return createAsyncIterableIteratorType(widenedType);
+                case 1 /* Generator */:
+                    return createIterableIteratorType(widenedType);
+                case 2 /* Async */:
+                    // From within an async function you can return either a non-promise value or a promise. Any
+                    // Promise/A+ compatible implementation will always assimilate any foreign promise, so the
+                    // return type of the body is awaited type of the body, wrapped in a native Promise<T> type.
+                    return createPromiseType(widenedType);
+                default:
+                    return widenedType;
+            }
+        }
+        function checkAndAggregateYieldOperandTypes(func, checkMode) {
+            var aggregatedTypes = [];
+            var isAsync = (ts.getFunctionFlags(func) & 2 /* Async */) !== 0;
+            ts.forEachYieldExpression(func.body, function (yieldExpression) {
+                ts.pushIfUnique(aggregatedTypes, getYieldedTypeOfYieldExpression(yieldExpression, isAsync, checkMode));
+            });
+            return aggregatedTypes;
+        }
+        function getYieldedTypeOfYieldExpression(node, isAsync, checkMode) {
+            var errorNode = node.expression || node;
+            var expressionType = node.expression ? checkExpressionCached(node.expression, checkMode) : undefinedWideningType;
+            // A `yield*` expression effectively yields everything that its operand yields
+            var yieldedType = node.asteriskToken ? checkIteratedTypeOrElementType(expressionType, errorNode, /*allowStringInput*/ false, isAsync) : expressionType;
+            return !isAsync ? yieldedType : getAwaitedType(yieldedType, errorNode, node.asteriskToken
+                ? ts.Diagnostics.Type_of_iterated_elements_of_a_yield_Asterisk_operand_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member
+                : ts.Diagnostics.Type_of_yield_operand_in_an_async_generator_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member);
+        }
+        function isExhaustiveSwitchStatement(node) {
+            if (!node.possiblyExhaustive) {
+                return false;
+            }
+            var type = getTypeOfExpression(node.expression);
+            if (!isLiteralType(type)) {
+                return false;
+            }
+            var switchTypes = getSwitchClauseTypes(node);
+            if (!switchTypes.length || ts.some(switchTypes, isNeitherUnitTypeNorNever)) {
+                return false;
+            }
+            return eachTypeContainedIn(mapType(type, getRegularTypeOfLiteralType), switchTypes);
+        }
+        function functionHasImplicitReturn(func) {
+            if (!(func.flags & 128 /* HasImplicitReturn */)) {
+                return false;
+            }
+            if (ts.some(func.body.statements, function (statement) { return statement.kind === 227 /* SwitchStatement */ && isExhaustiveSwitchStatement(statement); })) {
+                return false;
+            }
+            return true;
+        }
+        /** NOTE: Return value of `[]` means a different thing than `undefined`. `[]` means func returns `void`, `undefined` means it returns `never`. */
+        function checkAndAggregateReturnExpressionTypes(func, checkMode) {
+            var functionFlags = ts.getFunctionFlags(func);
+            var aggregatedTypes = [];
+            var hasReturnWithNoExpression = functionHasImplicitReturn(func);
+            var hasReturnOfTypeNever = false;
+            ts.forEachReturnStatement(func.body, function (returnStatement) {
+                var expr = returnStatement.expression;
+                if (expr) {
+                    var type = checkExpressionCached(expr, checkMode);
+                    if (functionFlags & 2 /* Async */) {
+                        // From within an async function you can return either a non-promise value or a promise. Any
+                        // Promise/A+ compatible implementation will always assimilate any foreign promise, so the
+                        // return type of the body should be unwrapped to its awaited type, which should be wrapped in
+                        // the native Promise<T> type by the caller.
+                        type = checkAwaitedType(type, func, ts.Diagnostics.The_return_type_of_an_async_function_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member);
+                    }
+                    if (type.flags & 32768 /* Never */) {
+                        hasReturnOfTypeNever = true;
+                    }
+                    ts.pushIfUnique(aggregatedTypes, type);
+                }
+                else {
+                    hasReturnWithNoExpression = true;
+                }
+            });
+            if (aggregatedTypes.length === 0 && !hasReturnWithNoExpression && (hasReturnOfTypeNever || mayReturnNever(func))) {
+                return undefined;
+            }
+            if (strictNullChecks && aggregatedTypes.length && hasReturnWithNoExpression &&
+                !(isJavaScriptConstructor(func) && aggregatedTypes.some(function (t) { return t.symbol === func.symbol; }))) {
+                // Javascript "callable constructors", containing eg `if (!(this instanceof A)) return new A()` should not add undefined
+                ts.pushIfUnique(aggregatedTypes, undefinedType);
+            }
+            return aggregatedTypes;
+        }
+        function mayReturnNever(func) {
+            switch (func.kind) {
+                case 192 /* FunctionExpression */:
+                case 193 /* ArrowFunction */:
+                    return true;
+                case 154 /* MethodDeclaration */:
+                    return func.parent.kind === 184 /* ObjectLiteralExpression */;
+                default:
+                    return false;
+            }
+        }
+        /**
+         * TypeScript Specification 1.0 (6.3) - July 2014
+         *   An explicitly typed function whose return type isn't the Void type,
+         *   the Any type, or a union type containing the Void or Any type as a constituent
+         *   must have at least one return statement somewhere in its body.
+         *   An exception to this rule is if the function implementation consists of a single 'throw' statement.
+         *
+         * @param returnType - return type of the function, can be undefined if return type is not explicitly specified
+         */
+        function checkAllCodePathsInNonVoidFunctionReturnOrThrow(func, returnType) {
+            if (!produceDiagnostics) {
+                return;
+            }
+            // Functions with with an explicitly specified 'void' or 'any' return type don't need any return expressions.
+            if (returnType && maybeTypeOfKind(returnType, 3 /* AnyOrUnknown */ | 4096 /* Void */)) {
+                return;
+            }
+            // If all we have is a function signature, or an arrow function with an expression body, then there is nothing to check.
+            // also if HasImplicitReturn flag is not set this means that all codepaths in function body end with return or throw
+            if (func.kind === 153 /* MethodSignature */ || ts.nodeIsMissing(func.body) || func.body.kind !== 213 /* Block */ || !functionHasImplicitReturn(func)) {
+                return;
+            }
+            var hasExplicitReturn = func.flags & 256 /* HasExplicitReturn */;
+            if (returnType && returnType.flags & 32768 /* Never */) {
+                error(ts.getEffectiveReturnTypeNode(func), ts.Diagnostics.A_function_returning_never_cannot_have_a_reachable_end_point);
+            }
+            else if (returnType && !hasExplicitReturn) {
+                // minimal check: function has syntactic return type annotation and no explicit return statements in the body
+                // this function does not conform to the specification.
+                // NOTE: having returnType !== undefined is a precondition for entering this branch so func.type will always be present
+                error(ts.getEffectiveReturnTypeNode(func), ts.Diagnostics.A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value);
+            }
+            else if (returnType && strictNullChecks && !isTypeAssignableTo(undefinedType, returnType)) {
+                error(ts.getEffectiveReturnTypeNode(func), ts.Diagnostics.Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined);
+            }
+            else if (compilerOptions.noImplicitReturns) {
+                if (!returnType) {
+                    // If return type annotation is omitted check if function has any explicit return statements.
+                    // If it does not have any - its inferred return type is void - don't do any checks.
+                    // Otherwise get inferred return type from function body and report error only if it is not void / anytype
+                    if (!hasExplicitReturn) {
+                        return;
+                    }
+                    var inferredReturnType = getReturnTypeOfSignature(getSignatureFromDeclaration(func));
+                    if (isUnwrappedReturnTypeVoidOrAny(func, inferredReturnType)) {
+                        return;
+                    }
+                }
+                error(ts.getEffectiveReturnTypeNode(func) || func, ts.Diagnostics.Not_all_code_paths_return_a_value);
+            }
+        }
+        function checkFunctionExpressionOrObjectLiteralMethod(node, checkMode) {
+            ts.Debug.assert(node.kind !== 154 /* MethodDeclaration */ || ts.isObjectLiteralMethod(node));
+            // The identityMapper object is used to indicate that function expressions are wildcards
+            if (checkMode === 1 /* SkipContextSensitive */ && isContextSensitive(node)) {
+                return anyFunctionType;
+            }
+            // Grammar checking
+            var hasGrammarError = checkGrammarFunctionLikeDeclaration(node);
+            if (!hasGrammarError && node.kind === 192 /* FunctionExpression */) {
+                checkGrammarForGenerator(node);
+            }
+            var links = getNodeLinks(node);
+            var type = getTypeOfSymbol(getMergedSymbol(node.symbol));
+            if (isTypeAny(type)) {
+                return type;
+            }
+            // Check if function expression is contextually typed and assign parameter types if so.
+            if (!(links.flags & 1024 /* ContextChecked */)) {
+                var contextualSignature = getContextualSignature(node);
+                // If a type check is started at a function expression that is an argument of a function call, obtaining the
+                // contextual type may recursively get back to here during overload resolution of the call. If so, we will have
+                // already assigned contextual types.
+                if (!(links.flags & 1024 /* ContextChecked */)) {
+                    links.flags |= 1024 /* ContextChecked */;
+                    if (contextualSignature) {
+                        var signature = getSignaturesOfType(type, 0 /* Call */)[0];
+                        if (isContextSensitive(node)) {
+                            var contextualMapper = getContextualMapper(node);
+                            if (checkMode === 2 /* Inferential */) {
+                                inferFromAnnotatedParameters(signature, contextualSignature, contextualMapper);
+                            }
+                            var instantiatedContextualSignature = contextualMapper === identityMapper ?
+                                contextualSignature : instantiateSignature(contextualSignature, contextualMapper);
+                            assignContextualParameterTypes(signature, instantiatedContextualSignature);
+                        }
+                        if (!ts.getEffectiveReturnTypeNode(node) && !signature.resolvedReturnType) {
+                            var returnType = getReturnTypeFromBody(node, checkMode);
+                            if (!signature.resolvedReturnType) {
+                                signature.resolvedReturnType = returnType;
+                            }
+                        }
+                    }
+                    checkSignatureDeclaration(node);
+                    checkNodeDeferred(node);
+                }
+            }
+            return type;
+        }
+        function checkFunctionExpressionOrObjectLiteralMethodDeferred(node) {
+            ts.Debug.assert(node.kind !== 154 /* MethodDeclaration */ || ts.isObjectLiteralMethod(node));
+            var functionFlags = ts.getFunctionFlags(node);
+            var returnTypeNode = ts.getEffectiveReturnTypeNode(node);
+            var returnOrPromisedType = returnTypeNode &&
+                ((functionFlags & 3 /* AsyncGenerator */) === 2 /* Async */ ?
+                    checkAsyncFunctionReturnType(node) : // Async function
+                    getTypeFromTypeNode(returnTypeNode)); // AsyncGenerator function, Generator function, or normal function
+            if ((functionFlags & 1 /* Generator */) === 0) { // Async function or normal function
+                // return is not necessary in the body of generators
+                checkAllCodePathsInNonVoidFunctionReturnOrThrow(node, returnOrPromisedType);
+            }
+            if (node.body) {
+                if (!returnTypeNode) {
+                    // There are some checks that are only performed in getReturnTypeFromBody, that may produce errors
+                    // we need. An example is the noImplicitAny errors resulting from widening the return expression
+                    // of a function. Because checking of function expression bodies is deferred, there was never an
+                    // appropriate time to do this during the main walk of the file (see the comment at the top of
+                    // checkFunctionExpressionBodies). So it must be done now.
+                    getReturnTypeOfSignature(getSignatureFromDeclaration(node));
+                }
+                if (node.body.kind === 213 /* Block */) {
+                    checkSourceElement(node.body);
+                }
+                else {
+                    // From within an async function you can return either a non-promise value or a promise. Any
+                    // Promise/A+ compatible implementation will always assimilate any foreign promise, so we
+                    // should not be checking assignability of a promise to the return type. Instead, we need to
+                    // check assignability of the awaited type of the expression body against the promised type of
+                    // its return type annotation.
+                    var exprType = checkExpression(node.body);
+                    if (returnOrPromisedType) {
+                        if ((functionFlags & 3 /* AsyncGenerator */) === 2 /* Async */) { // Async function
+                            var awaitedType = checkAwaitedType(exprType, node.body, ts.Diagnostics.The_return_type_of_an_async_function_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member);
+                            checkTypeAssignableTo(awaitedType, returnOrPromisedType, node.body);
+                        }
+                        else { // Normal function
+                            checkTypeAssignableTo(exprType, returnOrPromisedType, node.body);
+                        }
+                    }
+                }
+            }
+        }
+        function checkArithmeticOperandType(operand, type, diagnostic) {
+            if (!isTypeAssignableToKind(type, 168 /* NumberLike */)) {
+                error(operand, diagnostic);
+                return false;
+            }
+            return true;
+        }
+        function isReadonlySymbol(symbol) {
+            // The following symbols are considered read-only:
+            // Properties with a 'readonly' modifier
+            // Variables declared with 'const'
+            // Get accessors without matching set accessors
+            // Enum members
+            // Unions and intersections of the above (unions and intersections eagerly set isReadonly on creation)
+            return !!(ts.getCheckFlags(symbol) & 8 /* Readonly */ ||
+                symbol.flags & 4 /* Property */ && ts.getDeclarationModifierFlagsFromSymbol(symbol) & 64 /* Readonly */ ||
+                symbol.flags & 3 /* Variable */ && getDeclarationNodeFlagsFromSymbol(symbol) & 2 /* Const */ ||
+                symbol.flags & 98304 /* Accessor */ && !(symbol.flags & 65536 /* SetAccessor */) ||
+                symbol.flags & 8 /* EnumMember */);
+        }
+        function isReferenceToReadonlyEntity(expr, symbol) {
+            if (isReadonlySymbol(symbol)) {
+                // Allow assignments to readonly properties within constructors of the same class declaration.
+                if (symbol.flags & 4 /* Property */ &&
+                    (expr.kind === 185 /* PropertyAccessExpression */ || expr.kind === 186 /* ElementAccessExpression */) &&
+                    expr.expression.kind === 99 /* ThisKeyword */) {
+                    // Look for if this is the constructor for the class that `symbol` is a property of.
+                    var func = ts.getContainingFunction(expr);
+                    if (!(func && func.kind === 155 /* Constructor */)) {
+                        return true;
+                    }
+                    // If func.parent is a class and symbol is a (readonly) property of that class, or
+                    // if func is a constructor and symbol is a (readonly) parameter property declared in it,
+                    // then symbol is writeable here.
+                    return !(func.parent === symbol.valueDeclaration.parent || func === symbol.valueDeclaration.parent);
+                }
+                return true;
+            }
+            return false;
+        }
+        function isReferenceThroughNamespaceImport(expr) {
+            if (expr.kind === 185 /* PropertyAccessExpression */ || expr.kind === 186 /* ElementAccessExpression */) {
+                var node = ts.skipParentheses(expr.expression);
+                if (node.kind === 71 /* Identifier */) {
+                    var symbol = getNodeLinks(node).resolvedSymbol;
+                    if (symbol.flags & 2097152 /* Alias */) {
+                        var declaration = getDeclarationOfAliasSymbol(symbol);
+                        return !!declaration && declaration.kind === 246 /* NamespaceImport */;
+                    }
+                }
+            }
+            return false;
+        }
+        function checkReferenceExpression(expr, invalidReferenceMessage) {
+            // References are combinations of identifiers, parentheses, and property accesses.
+            var node = ts.skipOuterExpressions(expr, 2 /* Assertions */ | 1 /* Parentheses */);
+            if (node.kind !== 71 /* Identifier */ && node.kind !== 185 /* PropertyAccessExpression */ && node.kind !== 186 /* ElementAccessExpression */) {
+                error(expr, invalidReferenceMessage);
+                return false;
+            }
+            return true;
+        }
+        function checkDeleteExpression(node) {
+            checkExpression(node.expression);
+            var expr = ts.skipParentheses(node.expression);
+            if (expr.kind !== 185 /* PropertyAccessExpression */ && expr.kind !== 186 /* ElementAccessExpression */) {
+                error(expr, ts.Diagnostics.The_operand_of_a_delete_operator_must_be_a_property_reference);
+                return booleanType;
+            }
+            var links = getNodeLinks(expr);
+            var symbol = getExportSymbolOfValueSymbolIfExported(links.resolvedSymbol);
+            if (symbol && isReadonlySymbol(symbol)) {
+                error(expr, ts.Diagnostics.The_operand_of_a_delete_operator_cannot_be_a_read_only_property);
+            }
+            return booleanType;
+        }
+        function checkTypeOfExpression(node) {
+            checkExpression(node.expression);
+            return typeofType;
+        }
+        function checkVoidExpression(node) {
+            checkExpression(node.expression);
+            return undefinedWideningType;
+        }
+        function checkAwaitExpression(node) {
+            // Grammar checking
+            if (produceDiagnostics) {
+                if (!(node.flags & 16384 /* AwaitContext */)) {
+                    grammarErrorOnFirstToken(node, ts.Diagnostics.await_expression_is_only_allowed_within_an_async_function);
+                }
+                if (isInParameterInitializerBeforeContainingFunction(node)) {
+                    error(node, ts.Diagnostics.await_expressions_cannot_be_used_in_a_parameter_initializer);
+                }
+            }
+            var operandType = checkExpression(node.expression);
+            return checkAwaitedType(operandType, node, ts.Diagnostics.Type_of_await_operand_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member);
+        }
+        function checkPrefixUnaryExpression(node) {
+            var operandType = checkExpression(node.operand);
+            if (operandType === silentNeverType) {
+                return silentNeverType;
+            }
+            if (node.operand.kind === 8 /* NumericLiteral */) {
+                if (node.operator === 38 /* MinusToken */) {
+                    return getFreshTypeOfLiteralType(getLiteralType(-node.operand.text));
+                }
+                else if (node.operator === 37 /* PlusToken */) {
+                    return getFreshTypeOfLiteralType(getLiteralType(+node.operand.text));
+                }
+            }
+            switch (node.operator) {
+                case 37 /* PlusToken */:
+                case 38 /* MinusToken */:
+                case 52 /* TildeToken */:
+                    checkNonNullType(operandType, node.operand);
+                    if (maybeTypeOfKind(operandType, 3072 /* ESSymbolLike */)) {
+                        error(node.operand, ts.Diagnostics.The_0_operator_cannot_be_applied_to_type_symbol, ts.tokenToString(node.operator));
+                    }
+                    return numberType;
+                case 51 /* ExclamationToken */:
+                    var facts = getTypeFacts(operandType) & (1048576 /* Truthy */ | 2097152 /* Falsy */);
+                    return facts === 1048576 /* Truthy */ ? falseType :
+                        facts === 2097152 /* Falsy */ ? trueType :
+                            booleanType;
+                case 43 /* PlusPlusToken */:
+                case 44 /* MinusMinusToken */:
+                    var ok = checkArithmeticOperandType(node.operand, checkNonNullType(operandType, node.operand), ts.Diagnostics.An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type);
+                    if (ok) {
+                        // run check only if former checks succeeded to avoid reporting cascading errors
+                        checkReferenceExpression(node.operand, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_or_a_property_access);
+                    }
+                    return numberType;
+            }
+            return errorType;
+        }
+        function checkPostfixUnaryExpression(node) {
+            var operandType = checkExpression(node.operand);
+            if (operandType === silentNeverType) {
+                return silentNeverType;
+            }
+            var ok = checkArithmeticOperandType(node.operand, checkNonNullType(operandType, node.operand), ts.Diagnostics.An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type);
+            if (ok) {
+                // run check only if former checks succeeded to avoid reporting cascading errors
+                checkReferenceExpression(node.operand, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_or_a_property_access);
+            }
+            return numberType;
+        }
+        // Return true if type might be of the given kind. A union or intersection type might be of a given
+        // kind if at least one constituent type is of the given kind.
+        function maybeTypeOfKind(type, kind) {
+            if (type.flags & kind & ~134217728 /* GenericMappedType */ || kind & 134217728 /* GenericMappedType */ && isGenericMappedType(type)) {
+                return true;
+            }
+            if (type.flags & 786432 /* UnionOrIntersection */) {
+                var types = type.types;
+                for (var _i = 0, types_16 = types; _i < types_16.length; _i++) {
+                    var t = types_16[_i];
+                    if (maybeTypeOfKind(t, kind)) {
+                        return true;
+                    }
+                }
+            }
+            return false;
+        }
+        function isTypeAssignableToKind(source, kind, strict) {
+            if (source.flags & kind) {
+                return true;
+            }
+            if (strict && source.flags & (3 /* AnyOrUnknown */ | 4096 /* Void */ | 8192 /* Undefined */ | 16384 /* Null */)) {
+                return false;
+            }
+            return !!(kind & 168 /* NumberLike */) && isTypeAssignableTo(source, numberType) ||
+                !!(kind & 68 /* StringLike */) && isTypeAssignableTo(source, stringType) ||
+                !!(kind & 272 /* BooleanLike */) && isTypeAssignableTo(source, booleanType) ||
+                !!(kind & 4096 /* Void */) && isTypeAssignableTo(source, voidType) ||
+                !!(kind & 32768 /* Never */) && isTypeAssignableTo(source, neverType) ||
+                !!(kind & 16384 /* Null */) && isTypeAssignableTo(source, nullType) ||
+                !!(kind & 8192 /* Undefined */) && isTypeAssignableTo(source, undefinedType) ||
+                !!(kind & 1024 /* ESSymbol */) && isTypeAssignableTo(source, esSymbolType) ||
+                !!(kind & 16777216 /* NonPrimitive */) && isTypeAssignableTo(source, nonPrimitiveType);
+        }
+        function allTypesAssignableToKind(source, kind, strict) {
+            return source.flags & 262144 /* Union */ ?
+                ts.every(source.types, function (subType) { return allTypesAssignableToKind(subType, kind, strict); }) :
+                isTypeAssignableToKind(source, kind, strict);
+        }
+        function isConstEnumObjectType(type) {
+            return !!(ts.getObjectFlags(type) & 16 /* Anonymous */) && !!type.symbol && isConstEnumSymbol(type.symbol);
+        }
+        function isConstEnumSymbol(symbol) {
+            return (symbol.flags & 128 /* ConstEnum */) !== 0;
+        }
+        function checkInstanceOfExpression(left, right, leftType, rightType) {
+            if (leftType === silentNeverType || rightType === silentNeverType) {
+                return silentNeverType;
+            }
+            // TypeScript 1.0 spec (April 2014): 4.15.4
+            // The instanceof operator requires the left operand to be of type Any, an object type, or a type parameter type,
+            // and the right operand to be of type Any, a subtype of the 'Function' interface type, or have a call or construct signature.
+            // The result is always of the Boolean primitive type.
+            // NOTE: do not raise error if leftType is unknown as related error was already reported
+            if (!isTypeAny(leftType) &&
+                allTypesAssignableToKind(leftType, 32764 /* Primitive */)) {
+                error(left, ts.Diagnostics.The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_parameter);
+            }
+            // NOTE: do not raise error if right is unknown as related error was already reported
+            if (!(isTypeAny(rightType) || typeHasCallOrConstructSignatures(rightType) || isTypeSubtypeOf(rightType, globalFunctionType))) {
+                error(right, ts.Diagnostics.The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_Function_interface_type);
+            }
+            return booleanType;
+        }
+        function checkInExpression(left, right, leftType, rightType) {
+            if (leftType === silentNeverType || rightType === silentNeverType) {
+                return silentNeverType;
+            }
+            leftType = checkNonNullType(leftType, left);
+            rightType = checkNonNullType(rightType, right);
+            // TypeScript 1.0 spec (April 2014): 4.15.5
+            // The in operator requires the left operand to be of type Any, the String primitive type, or the Number primitive type,
+            // and the right operand to be of type Any, an object type, or a type parameter type.
+            // The result is always of the Boolean primitive type.
+            if (!(isTypeComparableTo(leftType, stringType) || isTypeAssignableToKind(leftType, 168 /* NumberLike */ | 3072 /* ESSymbolLike */))) {
+                error(left, ts.Diagnostics.The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol);
+            }
+            if (!isTypeAssignableToKind(rightType, 16777216 /* NonPrimitive */ | 14745600 /* InstantiableNonPrimitive */)) {
+                error(right, ts.Diagnostics.The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter);
+            }
+            return booleanType;
+        }
+        function checkObjectLiteralAssignment(node, sourceType) {
+            var properties = node.properties;
+            if (strictNullChecks && properties.length === 0) {
+                return checkNonNullType(sourceType, node);
+            }
+            for (var _i = 0, properties_7 = properties; _i < properties_7.length; _i++) {
+                var p = properties_7[_i];
+                checkObjectLiteralDestructuringPropertyAssignment(sourceType, p, properties);
+            }
+            return sourceType;
+        }
+        /** Note: If property cannot be a SpreadAssignment, then allProperties does not need to be provided */
+        function checkObjectLiteralDestructuringPropertyAssignment(objectLiteralType, property, allProperties) {
+            if (property.kind === 270 /* PropertyAssignment */ || property.kind === 271 /* ShorthandPropertyAssignment */) {
+                var name = property.name;
+                if (name.kind === 147 /* ComputedPropertyName */) {
+                    checkComputedPropertyName(name);
+                }
+                if (isComputedNonLiteralName(name)) {
+                    return undefined;
+                }
+                var text = ts.getTextOfPropertyName(name);
+                var type = isTypeAny(objectLiteralType)
+                    ? objectLiteralType
+                    : getTypeOfPropertyOfType(objectLiteralType, text) ||
+                        isNumericLiteralName(text) && getIndexTypeOfType(objectLiteralType, 1 /* Number */) ||
+                        getIndexTypeOfType(objectLiteralType, 0 /* String */);
+                if (type) {
+                    if (property.kind === 271 /* ShorthandPropertyAssignment */) {
+                        return checkDestructuringAssignment(property, type);
+                    }
+                    else {
+                        // non-shorthand property assignments should always have initializers
+                        return checkDestructuringAssignment(property.initializer, type);
+                    }
+                }
+                else {
+                    error(name, ts.Diagnostics.Type_0_has_no_property_1_and_no_string_index_signature, typeToString(objectLiteralType), ts.declarationNameToString(name));
+                }
+            }
+            else if (property.kind === 272 /* SpreadAssignment */) {
+                if (languageVersion < 6 /* ESNext */) {
+                    checkExternalEmitHelpers(property, 4 /* Rest */);
+                }
+                var nonRestNames = [];
+                if (allProperties) {
+                    for (var i = 0; i < allProperties.length - 1; i++) {
+                        nonRestNames.push(allProperties[i].name);
+                    }
+                }
+                var type = getRestType(objectLiteralType, nonRestNames, objectLiteralType.symbol);
+                checkGrammarForDisallowedTrailingComma(allProperties, ts.Diagnostics.A_rest_parameter_or_binding_pattern_may_not_have_a_trailing_comma);
+                return checkDestructuringAssignment(property.expression, type);
+            }
+            else {
+                error(property, ts.Diagnostics.Property_assignment_expected);
+            }
+        }
+        function checkArrayLiteralAssignment(node, sourceType, checkMode) {
+            var elements = node.elements;
+            if (languageVersion < 2 /* ES2015 */ && compilerOptions.downlevelIteration) {
+                checkExternalEmitHelpers(node, 512 /* Read */);
+            }
+            // This elementType will be used if the specific property corresponding to this index is not
+            // present (aka the tuple element property). This call also checks that the parentType is in
+            // fact an iterable or array (depending on target language).
+            var elementType = checkIteratedTypeOrElementType(sourceType, node, /*allowStringInput*/ false, /*allowAsyncIterables*/ false) || errorType;
+            for (var i = 0; i < elements.length; i++) {
+                checkArrayLiteralDestructuringElementAssignment(node, sourceType, i, elementType, checkMode);
+            }
+            return sourceType;
+        }
+        function checkArrayLiteralDestructuringElementAssignment(node, sourceType, elementIndex, elementType, checkMode) {
+            var elements = node.elements;
+            var element = elements[elementIndex];
+            if (element.kind !== 206 /* OmittedExpression */) {
+                if (element.kind !== 204 /* SpreadElement */) {
+                    var propName = "" + elementIndex;
+                    var type = isTypeAny(sourceType)
+                        ? sourceType
+                        : isTupleLikeType(sourceType)
+                            ? getTypeOfPropertyOfType(sourceType, propName)
+                            : elementType;
+                    if (type) {
+                        return checkDestructuringAssignment(element, type, checkMode);
+                    }
+                    else {
+                        // We still need to check element expression here because we may need to set appropriate flag on the expression
+                        // such as NodeCheckFlags.LexicalThis on "this"expression.
+                        checkExpression(element);
+                        if (isTupleType(sourceType)) {
+                            error(element, ts.Diagnostics.Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2, typeToString(sourceType), getTypeReferenceArity(sourceType), elements.length);
+                        }
+                        else {
+                            error(element, ts.Diagnostics.Type_0_has_no_property_1, typeToString(sourceType), propName);
+                        }
+                    }
+                }
+                else {
+                    if (elementIndex < elements.length - 1) {
+                        error(element, ts.Diagnostics.A_rest_element_must_be_last_in_a_destructuring_pattern);
+                    }
+                    else {
+                        var restExpression = element.expression;
+                        if (restExpression.kind === 200 /* BinaryExpression */ && restExpression.operatorToken.kind === 58 /* EqualsToken */) {
+                            error(restExpression.operatorToken, ts.Diagnostics.A_rest_element_cannot_have_an_initializer);
+                        }
+                        else {
+                            checkGrammarForDisallowedTrailingComma(node.elements, ts.Diagnostics.A_rest_parameter_or_binding_pattern_may_not_have_a_trailing_comma);
+                            return checkDestructuringAssignment(restExpression, createArrayType(elementType), checkMode);
+                        }
+                    }
+                }
+            }
+            return undefined;
+        }
+        function checkDestructuringAssignment(exprOrAssignment, sourceType, checkMode) {
+            var target;
+            if (exprOrAssignment.kind === 271 /* ShorthandPropertyAssignment */) {
+                var prop = exprOrAssignment;
+                if (prop.objectAssignmentInitializer) {
+                    // In strict null checking mode, if a default value of a non-undefined type is specified, remove
+                    // undefined from the final type.
+                    if (strictNullChecks &&
+                        !(getFalsyFlags(checkExpression(prop.objectAssignmentInitializer)) & 8192 /* Undefined */)) {
+                        sourceType = getTypeWithFacts(sourceType, 131072 /* NEUndefined */);
+                    }
+                    checkBinaryLikeExpression(prop.name, prop.equalsToken, prop.objectAssignmentInitializer, checkMode);
+                }
+                target = exprOrAssignment.name;
+            }
+            else {
+                target = exprOrAssignment;
+            }
+            if (target.kind === 200 /* BinaryExpression */ && target.operatorToken.kind === 58 /* EqualsToken */) {
+                checkBinaryExpression(target, checkMode);
+                target = target.left;
+            }
+            if (target.kind === 184 /* ObjectLiteralExpression */) {
+                return checkObjectLiteralAssignment(target, sourceType);
+            }
+            if (target.kind === 183 /* ArrayLiteralExpression */) {
+                return checkArrayLiteralAssignment(target, sourceType, checkMode);
+            }
+            return checkReferenceAssignment(target, sourceType, checkMode);
+        }
+        function checkReferenceAssignment(target, sourceType, checkMode) {
+            var targetType = checkExpression(target, checkMode);
+            var error = target.parent.kind === 272 /* SpreadAssignment */ ?
+                ts.Diagnostics.The_target_of_an_object_rest_assignment_must_be_a_variable_or_a_property_access :
+                ts.Diagnostics.The_left_hand_side_of_an_assignment_expression_must_be_a_variable_or_a_property_access;
+            if (checkReferenceExpression(target, error)) {
+                checkTypeAssignableTo(sourceType, targetType, target, /*headMessage*/ undefined);
+            }
+            return sourceType;
+        }
+        /**
+         * This is a *shallow* check: An expression is side-effect-free if the
+         * evaluation of the expression *itself* cannot produce side effects.
+         * For example, x++ / 3 is side-effect free because the / operator
+         * does not have side effects.
+         * The intent is to "smell test" an expression for correctness in positions where
+         * its value is discarded (e.g. the left side of the comma operator).
+         */
+        function isSideEffectFree(node) {
+            node = ts.skipParentheses(node);
+            switch (node.kind) {
+                case 71 /* Identifier */:
+                case 9 /* StringLiteral */:
+                case 12 /* RegularExpressionLiteral */:
+                case 189 /* TaggedTemplateExpression */:
+                case 202 /* TemplateExpression */:
+                case 13 /* NoSubstitutionTemplateLiteral */:
+                case 8 /* NumericLiteral */:
+                case 101 /* TrueKeyword */:
+                case 86 /* FalseKeyword */:
+                case 95 /* NullKeyword */:
+                case 140 /* UndefinedKeyword */:
+                case 192 /* FunctionExpression */:
+                case 205 /* ClassExpression */:
+                case 193 /* ArrowFunction */:
+                case 183 /* ArrayLiteralExpression */:
+                case 184 /* ObjectLiteralExpression */:
+                case 195 /* TypeOfExpression */:
+                case 209 /* NonNullExpression */:
+                case 256 /* JsxSelfClosingElement */:
+                case 255 /* JsxElement */:
+                    return true;
+                case 201 /* ConditionalExpression */:
+                    return isSideEffectFree(node.whenTrue) &&
+                        isSideEffectFree(node.whenFalse);
+                case 200 /* BinaryExpression */:
+                    if (ts.isAssignmentOperator(node.operatorToken.kind)) {
+                        return false;
+                    }
+                    return isSideEffectFree(node.left) &&
+                        isSideEffectFree(node.right);
+                case 198 /* PrefixUnaryExpression */:
+                case 199 /* PostfixUnaryExpression */:
+                    // Unary operators ~, !, +, and - have no side effects.
+                    // The rest do.
+                    switch (node.operator) {
+                        case 51 /* ExclamationToken */:
+                        case 37 /* PlusToken */:
+                        case 38 /* MinusToken */:
+                        case 52 /* TildeToken */:
+                            return true;
+                    }
+                    return false;
+                // Some forms listed here for clarity
+                case 196 /* VoidExpression */: // Explicit opt-out
+                case 190 /* TypeAssertionExpression */: // Not SEF, but can produce useful type warnings
+                case 208 /* AsExpression */: // Not SEF, but can produce useful type warnings
+                default:
+                    return false;
+            }
+        }
+        function isTypeEqualityComparableTo(source, target) {
+            return (target.flags & 24576 /* Nullable */) !== 0 || isTypeComparableTo(source, target);
+        }
+        function checkBinaryExpression(node, checkMode) {
+            if (ts.isInJavaScriptFile(node) && ts.getAssignedJavascriptInitializer(node)) {
+                return checkExpression(node.right, checkMode);
+            }
+            return checkBinaryLikeExpression(node.left, node.operatorToken, node.right, checkMode, node);
+        }
+        function checkBinaryLikeExpression(left, operatorToken, right, checkMode, errorNode) {
+            var operator = operatorToken.kind;
+            if (operator === 58 /* EqualsToken */ && (left.kind === 184 /* ObjectLiteralExpression */ || left.kind === 183 /* ArrayLiteralExpression */)) {
+                return checkDestructuringAssignment(left, checkExpression(right, checkMode), checkMode);
+            }
+            var leftType = checkExpression(left, checkMode);
+            var rightType = checkExpression(right, checkMode);
+            switch (operator) {
+                case 39 /* AsteriskToken */:
+                case 40 /* AsteriskAsteriskToken */:
+                case 61 /* AsteriskEqualsToken */:
+                case 62 /* AsteriskAsteriskEqualsToken */:
+                case 41 /* SlashToken */:
+                case 63 /* SlashEqualsToken */:
+                case 42 /* PercentToken */:
+                case 64 /* PercentEqualsToken */:
+                case 38 /* MinusToken */:
+                case 60 /* MinusEqualsToken */:
+                case 45 /* LessThanLessThanToken */:
+                case 65 /* LessThanLessThanEqualsToken */:
+                case 46 /* GreaterThanGreaterThanToken */:
+                case 66 /* GreaterThanGreaterThanEqualsToken */:
+                case 47 /* GreaterThanGreaterThanGreaterThanToken */:
+                case 67 /* GreaterThanGreaterThanGreaterThanEqualsToken */:
+                case 49 /* BarToken */:
+                case 69 /* BarEqualsToken */:
+                case 50 /* CaretToken */:
+                case 70 /* CaretEqualsToken */:
+                case 48 /* AmpersandToken */:
+                case 68 /* AmpersandEqualsToken */:
+                    if (leftType === silentNeverType || rightType === silentNeverType) {
+                        return silentNeverType;
+                    }
+                    leftType = checkNonNullType(leftType, left);
+                    rightType = checkNonNullType(rightType, right);
+                    var suggestedOperator = void 0;
+                    // if a user tries to apply a bitwise operator to 2 boolean operands
+                    // try and return them a helpful suggestion
+                    if ((leftType.flags & 272 /* BooleanLike */) &&
+                        (rightType.flags & 272 /* BooleanLike */) &&
+                        (suggestedOperator = getSuggestedBooleanOperator(operatorToken.kind)) !== undefined) {
+                        error(errorNode || operatorToken, ts.Diagnostics.The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead, ts.tokenToString(operatorToken.kind), ts.tokenToString(suggestedOperator));
+                    }
+                    else {
+                        // otherwise just check each operand separately and report errors as normal
+                        var leftOk = checkArithmeticOperandType(left, leftType, ts.Diagnostics.The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type);
+                        var rightOk = checkArithmeticOperandType(right, rightType, ts.Diagnostics.The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type);
+                        if (leftOk && rightOk) {
+                            checkAssignmentOperator(numberType);
+                        }
+                    }
+                    return numberType;
+                case 37 /* PlusToken */:
+                case 59 /* PlusEqualsToken */:
+                    if (leftType === silentNeverType || rightType === silentNeverType) {
+                        return silentNeverType;
+                    }
+                    if (!isTypeAssignableToKind(leftType, 68 /* StringLike */) && !isTypeAssignableToKind(rightType, 68 /* StringLike */)) {
+                        leftType = checkNonNullType(leftType, left);
+                        rightType = checkNonNullType(rightType, right);
+                    }
+                    var resultType = void 0;
+                    if (isTypeAssignableToKind(leftType, 168 /* NumberLike */, /*strict*/ true) && isTypeAssignableToKind(rightType, 168 /* NumberLike */, /*strict*/ true)) {
+                        // Operands of an enum type are treated as having the primitive type Number.
+                        // If both operands are of the Number primitive type, the result is of the Number primitive type.
+                        resultType = numberType;
+                    }
+                    else if (isTypeAssignableToKind(leftType, 68 /* StringLike */, /*strict*/ true) || isTypeAssignableToKind(rightType, 68 /* StringLike */, /*strict*/ true)) {
+                        // If one or both operands are of the String primitive type, the result is of the String primitive type.
+                        resultType = stringType;
+                    }
+                    else if (isTypeAny(leftType) || isTypeAny(rightType)) {
+                        // Otherwise, the result is of type Any.
+                        // NOTE: unknown type here denotes error type. Old compiler treated this case as any type so do we.
+                        resultType = leftType === errorType || rightType === errorType ? errorType : anyType;
+                    }
+                    // Symbols are not allowed at all in arithmetic expressions
+                    if (resultType && !checkForDisallowedESSymbolOperand(operator)) {
+                        return resultType;
+                    }
+                    if (!resultType) {
+                        reportOperatorError();
+                        return anyType;
+                    }
+                    if (operator === 59 /* PlusEqualsToken */) {
+                        checkAssignmentOperator(resultType);
+                    }
+                    return resultType;
+                case 27 /* LessThanToken */:
+                case 29 /* GreaterThanToken */:
+                case 30 /* LessThanEqualsToken */:
+                case 31 /* GreaterThanEqualsToken */:
+                    if (checkForDisallowedESSymbolOperand(operator)) {
+                        leftType = getBaseTypeOfLiteralType(checkNonNullType(leftType, left));
+                        rightType = getBaseTypeOfLiteralType(checkNonNullType(rightType, right));
+                        if (!isTypeComparableTo(leftType, rightType) && !isTypeComparableTo(rightType, leftType)) {
+                            reportOperatorError();
+                        }
+                    }
+                    return booleanType;
+                case 32 /* EqualsEqualsToken */:
+                case 33 /* ExclamationEqualsToken */:
+                case 34 /* EqualsEqualsEqualsToken */:
+                case 35 /* ExclamationEqualsEqualsToken */:
+                    var leftIsLiteral = isLiteralType(leftType);
+                    var rightIsLiteral = isLiteralType(rightType);
+                    if (!leftIsLiteral || !rightIsLiteral) {
+                        leftType = leftIsLiteral ? getBaseTypeOfLiteralType(leftType) : leftType;
+                        rightType = rightIsLiteral ? getBaseTypeOfLiteralType(rightType) : rightType;
+                    }
+                    if (!isTypeEqualityComparableTo(leftType, rightType) && !isTypeEqualityComparableTo(rightType, leftType)) {
+                        reportOperatorError();
+                    }
+                    return booleanType;
+                case 93 /* InstanceOfKeyword */:
+                    return checkInstanceOfExpression(left, right, leftType, rightType);
+                case 92 /* InKeyword */:
+                    return checkInExpression(left, right, leftType, rightType);
+                case 53 /* AmpersandAmpersandToken */:
+                    return getTypeFacts(leftType) & 1048576 /* Truthy */ ?
+                        getUnionType([extractDefinitelyFalsyTypes(strictNullChecks ? leftType : getBaseTypeOfLiteralType(rightType)), rightType]) :
+                        leftType;
+                case 54 /* BarBarToken */:
+                    return getTypeFacts(leftType) & 2097152 /* Falsy */ ?
+                        getUnionType([removeDefinitelyFalsyTypes(leftType), rightType], 2 /* Subtype */) :
+                        leftType;
+                case 58 /* EqualsToken */:
+                    checkSpecialAssignment(left, right);
+                    checkAssignmentOperator(rightType);
+                    return getRegularTypeOfObjectLiteral(rightType);
+                case 26 /* CommaToken */:
+                    if (!compilerOptions.allowUnreachableCode && isSideEffectFree(left) && !isEvalNode(right)) {
+                        error(left, ts.Diagnostics.Left_side_of_comma_operator_is_unused_and_has_no_side_effects);
+                    }
+                    return rightType;
+                default:
+                    return ts.Debug.fail();
+            }
+            function checkSpecialAssignment(left, right) {
+                var special = ts.getSpecialPropertyAssignmentKind(left.parent);
+                if (special === 2 /* ModuleExports */) {
+                    var rightType_1 = checkExpression(right, checkMode);
+                    for (var _i = 0, _a = getPropertiesOfObjectType(rightType_1); _i < _a.length; _i++) {
+                        var prop = _a[_i];
+                        var propType = getTypeOfSymbol(prop);
+                        if (propType.symbol && propType.symbol.flags & 32 /* Class */) {
+                            var name = prop.escapedName;
+                            var symbol = resolveName(prop.valueDeclaration, name, 67901928 /* Type */, undefined, name, /*isUse*/ false);
+                            if (symbol && symbol.declarations.some(ts.isJSDocTypedefTag)) {
+                                grammarErrorOnNode(symbol.declarations[0], ts.Diagnostics.Duplicate_identifier_0, ts.unescapeLeadingUnderscores(name));
+                                return grammarErrorOnNode(prop.valueDeclaration, ts.Diagnostics.Duplicate_identifier_0, ts.unescapeLeadingUnderscores(name));
+                            }
+                        }
+                    }
+                }
+            }
+            function isEvalNode(node) {
+                return node.kind === 71 /* Identifier */ && node.escapedText === "eval";
+            }
+            // Return true if there was no error, false if there was an error.
+            function checkForDisallowedESSymbolOperand(operator) {
+                var offendingSymbolOperand = maybeTypeOfKind(leftType, 3072 /* ESSymbolLike */) ? left :
+                    maybeTypeOfKind(rightType, 3072 /* ESSymbolLike */) ? right :
+                        undefined;
+                if (offendingSymbolOperand) {
+                    error(offendingSymbolOperand, ts.Diagnostics.The_0_operator_cannot_be_applied_to_type_symbol, ts.tokenToString(operator));
+                    return false;
+                }
+                return true;
+            }
+            function getSuggestedBooleanOperator(operator) {
+                switch (operator) {
+                    case 49 /* BarToken */:
+                    case 69 /* BarEqualsToken */:
+                        return 54 /* BarBarToken */;
+                    case 50 /* CaretToken */:
+                    case 70 /* CaretEqualsToken */:
+                        return 35 /* ExclamationEqualsEqualsToken */;
+                    case 48 /* AmpersandToken */:
+                    case 68 /* AmpersandEqualsToken */:
+                        return 53 /* AmpersandAmpersandToken */;
+                    default:
+                        return undefined;
+                }
+            }
+            function checkAssignmentOperator(valueType) {
+                if (produceDiagnostics && ts.isAssignmentOperator(operator)) {
+                    // TypeScript 1.0 spec (April 2014): 4.17
+                    // An assignment of the form
+                    //    VarExpr = ValueExpr
+                    // requires VarExpr to be classified as a reference
+                    // A compound assignment furthermore requires VarExpr to be classified as a reference (section 4.1)
+                    // and the type of the non-compound operation to be assignable to the type of VarExpr.
+                    if (checkReferenceExpression(left, ts.Diagnostics.The_left_hand_side_of_an_assignment_expression_must_be_a_variable_or_a_property_access)
+                        && (!ts.isIdentifier(left) || ts.unescapeLeadingUnderscores(left.escapedText) !== "exports")) {
+                        // to avoid cascading errors check assignability only if 'isReference' check succeeded and no errors were reported
+                        checkTypeAssignableTo(valueType, leftType, left, /*headMessage*/ undefined);
+                    }
+                }
+            }
+            function reportOperatorError() {
+                error(errorNode || operatorToken, ts.Diagnostics.Operator_0_cannot_be_applied_to_types_1_and_2, ts.tokenToString(operatorToken.kind), typeToString(leftType), typeToString(rightType));
+            }
+        }
+        function isYieldExpressionInClass(node) {
+            var current = node;
+            var parent = node.parent;
+            while (parent) {
+                if (ts.isFunctionLike(parent) && current === parent.body) {
+                    return false;
+                }
+                else if (ts.isClassLike(current)) {
+                    return true;
+                }
+                current = parent;
+                parent = parent.parent;
+            }
+            return false;
+        }
+        function checkYieldExpression(node) {
+            // Grammar checking
+            if (produceDiagnostics) {
+                if (!(node.flags & 4096 /* YieldContext */) || isYieldExpressionInClass(node)) {
+                    grammarErrorOnFirstToken(node, ts.Diagnostics.A_yield_expression_is_only_allowed_in_a_generator_body);
+                }
+                if (isInParameterInitializerBeforeContainingFunction(node)) {
+                    error(node, ts.Diagnostics.yield_expressions_cannot_be_used_in_a_parameter_initializer);
+                }
+            }
+            var func = ts.getContainingFunction(node);
+            if (!func)
+                return anyType;
+            var functionFlags = ts.getFunctionFlags(func);
+            if (!(functionFlags & 1 /* Generator */)) {
+                // If the user's code is syntactically correct, the func should always have a star. After all, we are in a yield context.
+                return anyType;
+            }
+            if (node.asteriskToken) {
+                // Async generator functions prior to ESNext require the __await, __asyncDelegator,
+                // and __asyncValues helpers
+                if ((functionFlags & 3 /* AsyncGenerator */) === 3 /* AsyncGenerator */ &&
+                    languageVersion < 6 /* ESNext */) {
+                    checkExternalEmitHelpers(node, 26624 /* AsyncDelegatorIncludes */);
+                }
+                // Generator functions prior to ES2015 require the __values helper
+                if ((functionFlags & 3 /* AsyncGenerator */) === 1 /* Generator */ &&
+                    languageVersion < 2 /* ES2015 */ && compilerOptions.downlevelIteration) {
+                    checkExternalEmitHelpers(node, 256 /* Values */);
+                }
+            }
+            var isAsync = (functionFlags & 2 /* Async */) !== 0;
+            var yieldedType = getYieldedTypeOfYieldExpression(node, isAsync); // TODO: GH#18217
+            // There is no point in doing an assignability check if the function
+            // has no explicit return type because the return type is directly computed
+            // from the yield expressions.
+            var returnType = ts.getEffectiveReturnTypeNode(func);
+            if (returnType) {
+                var signatureElementType = getIteratedTypeOfGenerator(getTypeFromTypeNode(returnType), isAsync) || anyType;
+                checkTypeAssignableTo(yieldedType, signatureElementType, node.expression || node, /*headMessage*/ undefined);
+            }
+            // Both yield and yield* expressions have type 'any'
+            return anyType;
+        }
+        function checkConditionalExpression(node, checkMode) {
+            checkExpression(node.condition);
+            var type1 = checkExpression(node.whenTrue, checkMode);
+            var type2 = checkExpression(node.whenFalse, checkMode);
+            return getUnionType([type1, type2], 2 /* Subtype */);
+        }
+        function checkTemplateExpression(node) {
+            // We just want to check each expressions, but we are unconcerned with
+            // the type of each expression, as any value may be coerced into a string.
+            // It is worth asking whether this is what we really want though.
+            // A place where we actually *are* concerned with the expressions' types are
+            // in tagged templates.
+            ts.forEach(node.templateSpans, function (templateSpan) {
+                if (maybeTypeOfKind(checkExpression(templateSpan.expression), 3072 /* ESSymbolLike */)) {
+                    error(templateSpan.expression, ts.Diagnostics.Type_0_cannot_be_converted_to_type_1, typeToString(esSymbolType), typeToString(stringType));
+                }
+            });
+            return stringType;
+        }
+        function getContextNode(node) {
+            if (node.kind === 263 /* JsxAttributes */) {
+                return node.parent.parent; // Needs to be the root JsxElement, so it encompasses the attributes _and_ the children (which are essentially part of the attributes)
+            }
+            return node;
+        }
+        function checkExpressionWithContextualType(node, contextualType, contextualMapper) {
+            var context = getContextNode(node);
+            var saveContextualType = context.contextualType;
+            var saveContextualMapper = context.contextualMapper;
+            context.contextualType = contextualType;
+            context.contextualMapper = contextualMapper;
+            var checkMode = contextualMapper === identityMapper ? 1 /* SkipContextSensitive */ :
+                contextualMapper ? 2 /* Inferential */ : 3 /* Contextual */;
+            var result = checkExpression(node, checkMode);
+            context.contextualType = saveContextualType;
+            context.contextualMapper = saveContextualMapper;
+            return result;
+        }
+        function checkExpressionCached(node, checkMode) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                if (checkMode) {
+                    return checkExpression(node, checkMode);
+                }
+                // When computing a type that we're going to cache, we need to ignore any ongoing control flow
+                // analysis because variables may have transient types in indeterminable states. Moving flowLoopStart
+                // to the top of the stack ensures all transient types are computed from a known point.
+                var saveFlowLoopStart = flowLoopStart;
+                flowLoopStart = flowLoopCount;
+                links.resolvedType = checkExpression(node, checkMode);
+                flowLoopStart = saveFlowLoopStart;
+            }
+            return links.resolvedType;
+        }
+        function isTypeAssertion(node) {
+            node = ts.skipParentheses(node);
+            return node.kind === 190 /* TypeAssertionExpression */ || node.kind === 208 /* AsExpression */;
+        }
+        function checkDeclarationInitializer(declaration) {
+            var initializer = ts.getEffectiveInitializer(declaration);
+            var type = getTypeOfExpression(initializer, /*cache*/ true);
+            var widened = ts.getCombinedNodeFlags(declaration) & 2 /* Const */ ||
+                (ts.getCombinedModifierFlags(declaration) & 64 /* Readonly */ && !ts.isParameterPropertyDeclaration(declaration)) ||
+                isTypeAssertion(initializer) ? type : getWidenedLiteralType(type);
+            if (ts.isInJavaScriptFile(declaration)) {
+                if (widened.flags & 24576 /* Nullable */) {
+                    if (noImplicitAny) {
+                        reportImplicitAnyError(declaration, anyType);
+                    }
+                    return anyType;
+                }
+                else if (isEmptyArrayLiteralType(widened)) {
+                    if (noImplicitAny) {
+                        reportImplicitAnyError(declaration, anyArrayType);
+                    }
+                    return anyArrayType;
+                }
+            }
+            return widened;
+        }
+        function isLiteralOfContextualType(candidateType, contextualType) {
+            if (contextualType) {
+                if (contextualType.flags & 786432 /* UnionOrIntersection */) {
+                    var types = contextualType.types;
+                    return ts.some(types, function (t) { return isLiteralOfContextualType(candidateType, t); });
+                }
+                if (contextualType.flags & 14745600 /* InstantiableNonPrimitive */) {
+                    // If the contextual type is a type variable constrained to a primitive type, consider
+                    // this a literal context for literals of that primitive type. For example, given a
+                    // type parameter 'T extends string', infer string literal types for T.
+                    var constraint = getBaseConstraintOfType(contextualType) || emptyObjectType;
+                    return maybeTypeOfKind(constraint, 4 /* String */) && maybeTypeOfKind(candidateType, 64 /* StringLiteral */) ||
+                        maybeTypeOfKind(constraint, 8 /* Number */) && maybeTypeOfKind(candidateType, 128 /* NumberLiteral */) ||
+                        maybeTypeOfKind(constraint, 1024 /* ESSymbol */) && maybeTypeOfKind(candidateType, 2048 /* UniqueESSymbol */) ||
+                        isLiteralOfContextualType(candidateType, constraint);
+                }
+                // If the contextual type is a literal of a particular primitive type, we consider this a
+                // literal context for all literals of that primitive type.
+                return !!(contextualType.flags & (64 /* StringLiteral */ | 1048576 /* Index */) && maybeTypeOfKind(candidateType, 64 /* StringLiteral */) ||
+                    contextualType.flags & 128 /* NumberLiteral */ && maybeTypeOfKind(candidateType, 128 /* NumberLiteral */) ||
+                    contextualType.flags & 256 /* BooleanLiteral */ && maybeTypeOfKind(candidateType, 256 /* BooleanLiteral */) ||
+                    contextualType.flags & 2048 /* UniqueESSymbol */ && maybeTypeOfKind(candidateType, 2048 /* UniqueESSymbol */));
+            }
+            return false;
+        }
+        function checkExpressionForMutableLocation(node, checkMode, contextualType) {
+            if (arguments.length === 2) {
+                contextualType = getContextualType(node);
+            }
+            var type = checkExpression(node, checkMode);
+            return isTypeAssertion(node) ? type :
+                getWidenedLiteralLikeTypeForContextualType(type, contextualType);
+        }
+        function checkPropertyAssignment(node, checkMode) {
+            // Do not use hasDynamicName here, because that returns false for well known symbols.
+            // We want to perform checkComputedPropertyName for all computed properties, including
+            // well known symbols.
+            if (node.name.kind === 147 /* ComputedPropertyName */) {
+                checkComputedPropertyName(node.name);
+            }
+            return checkExpressionForMutableLocation(node.initializer, checkMode);
+        }
+        function checkObjectLiteralMethod(node, checkMode) {
+            // Grammar checking
+            checkGrammarMethod(node);
+            // Do not use hasDynamicName here, because that returns false for well known symbols.
+            // We want to perform checkComputedPropertyName for all computed properties, including
+            // well known symbols.
+            if (node.name.kind === 147 /* ComputedPropertyName */) {
+                checkComputedPropertyName(node.name);
+            }
+            var uninstantiatedType = checkFunctionExpressionOrObjectLiteralMethod(node, checkMode);
+            return instantiateTypeWithSingleGenericCallSignature(node, uninstantiatedType, checkMode);
+        }
+        function instantiateTypeWithSingleGenericCallSignature(node, type, checkMode) {
+            if (checkMode === 2 /* Inferential */) {
+                var signature = getSingleCallSignature(type);
+                if (signature && signature.typeParameters) {
+                    var contextualType = getApparentTypeOfContextualType(node);
+                    if (contextualType) {
+                        var contextualSignature = getSingleCallSignature(getNonNullableType(contextualType));
+                        if (contextualSignature && !contextualSignature.typeParameters) {
+                            return getOrCreateTypeFromSignature(instantiateSignatureInContextOf(signature, contextualSignature, getContextualMapper(node)));
+                        }
+                    }
+                }
+            }
+            return type;
+        }
+        /**
+         * Returns the type of an expression. Unlike checkExpression, this function is simply concerned
+         * with computing the type and may not fully check all contained sub-expressions for errors.
+         * A cache argument of true indicates that if the function performs a full type check, it is ok
+         * to cache the result.
+         */
+        function getTypeOfExpression(node, cache) {
+            // Optimize for the common case of a call to a function with a single non-generic call
+            // signature where we can just fetch the return type without checking the arguments.
+            if (node.kind === 187 /* CallExpression */ && node.expression.kind !== 97 /* SuperKeyword */ && !ts.isRequireCall(node, /*checkArgumentIsStringLiteralLike*/ true) && !isSymbolOrSymbolForCall(node)) {
+                var funcType = checkNonNullExpression(node.expression);
+                var signature = getSingleCallSignature(funcType);
+                if (signature && !signature.typeParameters) {
+                    return getReturnTypeOfSignature(signature);
+                }
+            }
+            // Otherwise simply call checkExpression. Ideally, the entire family of checkXXX functions
+            // should have a parameter that indicates whether full error checking is required such that
+            // we can perform the optimizations locally.
+            return cache ? checkExpressionCached(node) : checkExpression(node);
+        }
+        /**
+         * Returns the type of an expression. Unlike checkExpression, this function is simply concerned
+         * with computing the type and may not fully check all contained sub-expressions for errors.
+         * It is intended for uses where you know there is no contextual type,
+         * and requesting the contextual type might cause a circularity or other bad behaviour.
+         * It sets the contextual type of the node to any before calling getTypeOfExpression.
+         */
+        function getContextFreeTypeOfExpression(node) {
+            var saveContextualType = node.contextualType;
+            node.contextualType = anyType;
+            var type = getTypeOfExpression(node);
+            node.contextualType = saveContextualType;
+            return type;
+        }
+        function checkExpresionNoReturn(node) {
+            checkExpression(node);
+        }
+        // Checks an expression and returns its type. The contextualMapper parameter serves two purposes: When
+        // contextualMapper is not undefined and not equal to the identityMapper function object it indicates that the
+        // expression is being inferentially typed (section 4.15.2 in spec) and provides the type mapper to use in
+        // conjunction with the generic contextual type. When contextualMapper is equal to the identityMapper function
+        // object, it serves as an indicator that all contained function and arrow expressions should be considered to
+        // have the wildcard function type; this form of type check is used during overload resolution to exclude
+        // contextually typed function and arrow expressions in the initial phase.
+        function checkExpression(node, checkMode) {
+            var type;
+            if (node.kind === 146 /* QualifiedName */) {
+                type = checkQualifiedName(node);
+            }
+            else {
+                var uninstantiatedType = checkExpressionWorker(node, checkMode);
+                type = instantiateTypeWithSingleGenericCallSignature(node, uninstantiatedType, checkMode);
+            }
+            if (isConstEnumObjectType(type)) {
+                // enum object type for const enums are only permitted in:
+                // - 'left' in property access
+                // - 'object' in indexed access
+                // - target in rhs of import statement
+                var ok = (node.parent.kind === 185 /* PropertyAccessExpression */ && node.parent.expression === node) ||
+                    (node.parent.kind === 186 /* ElementAccessExpression */ && node.parent.expression === node) ||
+                    ((node.kind === 71 /* Identifier */ || node.kind === 146 /* QualifiedName */) && isInRightSideOfImportOrExportAssignment(node) ||
+                        (node.parent.kind === 165 /* TypeQuery */ && node.parent.exprName === node));
+                if (!ok) {
+                    error(node, ts.Diagnostics.const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_import_declaration_or_export_assignment_or_type_query);
+                }
+            }
+            return type;
+        }
+        function checkParenthesizedExpression(node, checkMode) {
+            var tag = ts.isInJavaScriptFile(node) ? ts.getJSDocTypeTag(node) : undefined;
+            if (tag) {
+                return checkAssertionWorker(tag, tag.typeExpression.type, node.expression, checkMode);
+            }
+            return checkExpression(node.expression, checkMode);
+        }
+        function checkExpressionWorker(node, checkMode) {
+            switch (node.kind) {
+                case 71 /* Identifier */:
+                    return checkIdentifier(node);
+                case 99 /* ThisKeyword */:
+                    return checkThisExpression(node);
+                case 97 /* SuperKeyword */:
+                    return checkSuperExpression(node);
+                case 95 /* NullKeyword */:
+                    return nullWideningType;
+                case 13 /* NoSubstitutionTemplateLiteral */:
+                case 9 /* StringLiteral */:
+                    return getFreshTypeOfLiteralType(getLiteralType(node.text));
+                case 8 /* NumericLiteral */:
+                    checkGrammarNumericLiteral(node);
+                    return getFreshTypeOfLiteralType(getLiteralType(+node.text));
+                case 101 /* TrueKeyword */:
+                    return trueType;
+                case 86 /* FalseKeyword */:
+                    return falseType;
+                case 202 /* TemplateExpression */:
+                    return checkTemplateExpression(node);
+                case 12 /* RegularExpressionLiteral */:
+                    return globalRegExpType;
+                case 183 /* ArrayLiteralExpression */:
+                    return checkArrayLiteral(node, checkMode);
+                case 184 /* ObjectLiteralExpression */:
+                    return checkObjectLiteral(node, checkMode);
+                case 185 /* PropertyAccessExpression */:
+                    return checkPropertyAccessExpression(node);
+                case 186 /* ElementAccessExpression */:
+                    return checkIndexedAccess(node);
+                case 187 /* CallExpression */:
+                    if (node.expression.kind === 91 /* ImportKeyword */) {
+                        return checkImportCallExpression(node);
+                    }
+                /* falls through */
+                case 188 /* NewExpression */:
+                    return checkCallExpression(node);
+                case 189 /* TaggedTemplateExpression */:
+                    return checkTaggedTemplateExpression(node);
+                case 191 /* ParenthesizedExpression */:
+                    return checkParenthesizedExpression(node, checkMode);
+                case 205 /* ClassExpression */:
+                    return checkClassExpression(node);
+                case 192 /* FunctionExpression */:
+                case 193 /* ArrowFunction */:
+                    return checkFunctionExpressionOrObjectLiteralMethod(node, checkMode);
+                case 195 /* TypeOfExpression */:
+                    return checkTypeOfExpression(node);
+                case 190 /* TypeAssertionExpression */:
+                case 208 /* AsExpression */:
+                    return checkAssertion(node);
+                case 209 /* NonNullExpression */:
+                    return checkNonNullAssertion(node);
+                case 210 /* MetaProperty */:
+                    return checkMetaProperty(node);
+                case 194 /* DeleteExpression */:
+                    return checkDeleteExpression(node);
+                case 196 /* VoidExpression */:
+                    return checkVoidExpression(node);
+                case 197 /* AwaitExpression */:
+                    return checkAwaitExpression(node);
+                case 198 /* PrefixUnaryExpression */:
+                    return checkPrefixUnaryExpression(node);
+                case 199 /* PostfixUnaryExpression */:
+                    return checkPostfixUnaryExpression(node);
+                case 200 /* BinaryExpression */:
+                    return checkBinaryExpression(node, checkMode);
+                case 201 /* ConditionalExpression */:
+                    return checkConditionalExpression(node, checkMode);
+                case 204 /* SpreadElement */:
+                    return checkSpreadExpression(node, checkMode);
+                case 206 /* OmittedExpression */:
+                    return undefinedWideningType;
+                case 203 /* YieldExpression */:
+                    return checkYieldExpression(node);
+                case 265 /* JsxExpression */:
+                    return checkJsxExpression(node, checkMode);
+                case 255 /* JsxElement */:
+                    return checkJsxElement(node, checkMode);
+                case 256 /* JsxSelfClosingElement */:
+                    return checkJsxSelfClosingElement(node, checkMode);
+                case 259 /* JsxFragment */:
+                    return checkJsxFragment(node, checkMode);
+                case 263 /* JsxAttributes */:
+                    return checkJsxAttributes(node, checkMode);
+                case 257 /* JsxOpeningElement */:
+                    ts.Debug.fail("Shouldn't ever directly check a JsxOpeningElement");
+            }
+            return errorType;
+        }
+        // DECLARATION AND STATEMENT TYPE CHECKING
+        function checkTypeParameter(node) {
+            // Grammar Checking
+            if (node.expression) {
+                grammarErrorOnFirstToken(node.expression, ts.Diagnostics.Type_expected);
+            }
+            checkSourceElement(node.constraint);
+            checkSourceElement(node.default);
+            var typeParameter = getDeclaredTypeOfTypeParameter(getSymbolOfNode(node));
+            if (!hasNonCircularBaseConstraint(typeParameter)) {
+                error(node.constraint, ts.Diagnostics.Type_parameter_0_has_a_circular_constraint, typeToString(typeParameter));
+            }
+            if (!hasNonCircularTypeParameterDefault(typeParameter)) {
+                error(node.default, ts.Diagnostics.Type_parameter_0_has_a_circular_default, typeToString(typeParameter));
+            }
+            var constraintType = getConstraintOfTypeParameter(typeParameter);
+            var defaultType = getDefaultFromTypeParameter(typeParameter);
+            if (constraintType && defaultType) {
+                checkTypeAssignableTo(defaultType, getTypeWithThisArgument(constraintType, defaultType), node.default, ts.Diagnostics.Type_0_does_not_satisfy_the_constraint_1);
+            }
+            if (produceDiagnostics) {
+                checkTypeNameIsReserved(node.name, ts.Diagnostics.Type_parameter_name_cannot_be_0);
+            }
+        }
+        function checkParameter(node) {
+            // Grammar checking
+            // It is a SyntaxError if the Identifier "eval" or the Identifier "arguments" occurs as the
+            // Identifier in a PropertySetParameterList of a PropertyAssignment that is contained in strict code
+            // or if its FunctionBody is strict code(11.1.5).
+            checkGrammarDecoratorsAndModifiers(node);
+            checkVariableLikeDeclaration(node);
+            var func = ts.getContainingFunction(node);
+            if (ts.hasModifier(node, 92 /* ParameterPropertyModifier */)) {
+                if (!(func.kind === 155 /* Constructor */ && ts.nodeIsPresent(func.body))) {
+                    error(node, ts.Diagnostics.A_parameter_property_is_only_allowed_in_a_constructor_implementation);
+                }
+            }
+            if (node.questionToken && ts.isBindingPattern(node.name) && func.body) {
+                error(node, ts.Diagnostics.A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature);
+            }
+            if (node.name && ts.isIdentifier(node.name) && (node.name.escapedText === "this" || node.name.escapedText === "new")) {
+                if (func.parameters.indexOf(node) !== 0) {
+                    error(node, ts.Diagnostics.A_0_parameter_must_be_the_first_parameter, node.name.escapedText);
+                }
+                if (func.kind === 155 /* Constructor */ || func.kind === 159 /* ConstructSignature */ || func.kind === 164 /* ConstructorType */) {
+                    error(node, ts.Diagnostics.A_constructor_cannot_have_a_this_parameter);
+                }
+            }
+            // Only check rest parameter type if it's not a binding pattern. Since binding patterns are
+            // not allowed in a rest parameter, we already have an error from checkGrammarParameterList.
+            if (node.dotDotDotToken && !ts.isBindingPattern(node.name) && !isArrayType(getTypeOfSymbol(node.symbol))) {
+                error(node, ts.Diagnostics.A_rest_parameter_must_be_of_an_array_type);
+            }
+        }
+        function getTypePredicateParameterIndex(parameterList, parameter) {
+            if (parameterList) {
+                for (var i = 0; i < parameterList.length; i++) {
+                    var param = parameterList[i];
+                    if (param.name.kind === 71 /* Identifier */ && param.name.escapedText === parameter.escapedText) {
+                        return i;
+                    }
+                }
+            }
+            return -1;
+        }
+        function checkTypePredicate(node) {
+            var parent = getTypePredicateParent(node);
+            if (!parent) {
+                // The parent must not be valid.
+                error(node, ts.Diagnostics.A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods);
+                return;
+            }
+            var typePredicate = getTypePredicateOfSignature(getSignatureFromDeclaration(parent));
+            if (!typePredicate) {
+                return;
+            }
+            checkSourceElement(node.type);
+            var parameterName = node.parameterName;
+            if (ts.isThisTypePredicate(typePredicate)) {
+                getTypeFromThisTypeNode(parameterName);
+            }
+            else {
+                if (typePredicate.parameterIndex >= 0) {
+                    if (parent.parameters[typePredicate.parameterIndex].dotDotDotToken) {
+                        error(parameterName, ts.Diagnostics.A_type_predicate_cannot_reference_a_rest_parameter);
+                    }
+                    else {
+                        var leadingError = function () { return ts.chainDiagnosticMessages(/*details*/ undefined, ts.Diagnostics.A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type); };
+                        checkTypeAssignableTo(typePredicate.type, getTypeOfNode(parent.parameters[typePredicate.parameterIndex]), // TODO: GH#18217
+                        node.type, 
+                        /*headMessage*/ undefined, leadingError);
+                    }
+                }
+                else if (parameterName) {
+                    var hasReportedError = false;
+                    for (var _i = 0, _a = parent.parameters; _i < _a.length; _i++) {
+                        var name = _a[_i].name;
+                        if (ts.isBindingPattern(name) &&
+                            checkIfTypePredicateVariableIsDeclaredInBindingPattern(name, parameterName, typePredicate.parameterName)) {
+                            hasReportedError = true;
+                            break;
+                        }
+                    }
+                    if (!hasReportedError) {
+                        error(node.parameterName, ts.Diagnostics.Cannot_find_parameter_0, typePredicate.parameterName);
+                    }
+                }
+            }
+        }
+        function getTypePredicateParent(node) {
+            switch (node.parent.kind) {
+                case 193 /* ArrowFunction */:
+                case 158 /* CallSignature */:
+                case 234 /* FunctionDeclaration */:
+                case 192 /* FunctionExpression */:
+                case 163 /* FunctionType */:
+                case 154 /* MethodDeclaration */:
+                case 153 /* MethodSignature */:
+                    var parent = node.parent;
+                    if (node === parent.type) {
+                        return parent;
+                    }
+            }
+        }
+        function checkIfTypePredicateVariableIsDeclaredInBindingPattern(pattern, predicateVariableNode, predicateVariableName) {
+            for (var _i = 0, _a = pattern.elements; _i < _a.length; _i++) {
+                var element = _a[_i];
+                if (ts.isOmittedExpression(element)) {
+                    continue;
+                }
+                var name = element.name;
+                if (name.kind === 71 /* Identifier */ && name.escapedText === predicateVariableName) {
+                    error(predicateVariableNode, ts.Diagnostics.A_type_predicate_cannot_reference_element_0_in_a_binding_pattern, predicateVariableName);
+                    return true;
+                }
+                else if (name.kind === 181 /* ArrayBindingPattern */ || name.kind === 180 /* ObjectBindingPattern */) {
+                    if (checkIfTypePredicateVariableIsDeclaredInBindingPattern(name, predicateVariableNode, predicateVariableName)) {
+                        return true;
+                    }
+                }
+            }
+        }
+        function checkSignatureDeclaration(node) {
+            // Grammar checking
+            if (node.kind === 160 /* IndexSignature */) {
+                checkGrammarIndexSignature(node);
+            }
+            // TODO (yuisu): Remove this check in else-if when SyntaxKind.Construct is moved and ambient context is handled
+            else if (node.kind === 163 /* FunctionType */ || node.kind === 234 /* FunctionDeclaration */ || node.kind === 164 /* ConstructorType */ ||
+                node.kind === 158 /* CallSignature */ || node.kind === 155 /* Constructor */ ||
+                node.kind === 159 /* ConstructSignature */) {
+                checkGrammarFunctionLikeDeclaration(node);
+            }
+            var functionFlags = ts.getFunctionFlags(node);
+            if (!(functionFlags & 4 /* Invalid */)) {
+                // Async generators prior to ESNext require the __await and __asyncGenerator helpers
+                if ((functionFlags & 3 /* AsyncGenerator */) === 3 /* AsyncGenerator */ && languageVersion < 6 /* ESNext */) {
+                    checkExternalEmitHelpers(node, 6144 /* AsyncGeneratorIncludes */);
+                }
+                // Async functions prior to ES2017 require the __awaiter helper
+                if ((functionFlags & 3 /* AsyncGenerator */) === 2 /* Async */ && languageVersion < 4 /* ES2017 */) {
+                    checkExternalEmitHelpers(node, 64 /* Awaiter */);
+                }
+                // Generator functions, Async functions, and Async Generator functions prior to
+                // ES2015 require the __generator helper
+                if ((functionFlags & 3 /* AsyncGenerator */) !== 0 /* Normal */ && languageVersion < 2 /* ES2015 */) {
+                    checkExternalEmitHelpers(node, 128 /* Generator */);
+                }
+            }
+            checkTypeParameters(node.typeParameters);
+            ts.forEach(node.parameters, checkParameter);
+            // TODO(rbuckton): Should we start checking JSDoc types?
+            if (node.type) {
+                checkSourceElement(node.type);
+            }
+            if (produceDiagnostics) {
+                checkCollisionWithArgumentsInGeneratedCode(node);
+                var returnTypeNode = ts.getEffectiveReturnTypeNode(node);
+                if (noImplicitAny && !returnTypeNode) {
+                    switch (node.kind) {
+                        case 159 /* ConstructSignature */:
+                            error(node, ts.Diagnostics.Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type);
+                            break;
+                        case 158 /* CallSignature */:
+                            error(node, ts.Diagnostics.Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type);
+                            break;
+                    }
+                }
+                if (returnTypeNode) {
+                    var functionFlags_1 = ts.getFunctionFlags(node);
+                    if ((functionFlags_1 & (4 /* Invalid */ | 1 /* Generator */)) === 1 /* Generator */) {
+                        var returnType = getTypeFromTypeNode(returnTypeNode);
+                        if (returnType === voidType) {
+                            error(returnTypeNode, ts.Diagnostics.A_generator_cannot_have_a_void_type_annotation);
+                        }
+                        else {
+                            var generatorElementType = getIteratedTypeOfGenerator(returnType, (functionFlags_1 & 2 /* Async */) !== 0) || anyType;
+                            var iterableIteratorInstantiation = functionFlags_1 & 2 /* Async */
+                                ? createAsyncIterableIteratorType(generatorElementType) // AsyncGenerator function
+                                : createIterableIteratorType(generatorElementType); // Generator function
+                            // Naively, one could check that IterableIterator<any> is assignable to the return type annotation.
+                            // However, that would not catch the error in the following case.
+                            //
+                            //    interface BadGenerator extends Iterable<number>, Iterator<string> { }
+                            //    function* g(): BadGenerator { } // Iterable and Iterator have different types!
+                            //
+                            checkTypeAssignableTo(iterableIteratorInstantiation, returnType, returnTypeNode);
+                        }
+                    }
+                    else if ((functionFlags_1 & 3 /* AsyncGenerator */) === 2 /* Async */) {
+                        checkAsyncFunctionReturnType(node);
+                    }
+                }
+                if (node.kind !== 160 /* IndexSignature */ && node.kind !== 284 /* JSDocFunctionType */) {
+                    registerForUnusedIdentifiersCheck(node);
+                }
+            }
+        }
+        function checkClassForDuplicateDeclarations(node) {
+            var Declaration;
+            (function (Declaration) {
+                Declaration[Declaration["Getter"] = 1] = "Getter";
+                Declaration[Declaration["Setter"] = 2] = "Setter";
+                Declaration[Declaration["Method"] = 4] = "Method";
+                Declaration[Declaration["Property"] = 3] = "Property";
+            })(Declaration || (Declaration = {}));
+            var instanceNames = ts.createUnderscoreEscapedMap();
+            var staticNames = ts.createUnderscoreEscapedMap();
+            for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
+                var member = _a[_i];
+                if (member.kind === 155 /* Constructor */) {
+                    for (var _b = 0, _c = member.parameters; _b < _c.length; _b++) {
+                        var param = _c[_b];
+                        if (ts.isParameterPropertyDeclaration(param) && !ts.isBindingPattern(param.name)) {
+                            addName(instanceNames, param.name, param.name.escapedText, 3 /* Property */);
+                        }
+                    }
+                }
+                else {
+                    var isStatic = ts.hasModifier(member, 32 /* Static */);
+                    var names = isStatic ? staticNames : instanceNames;
+                    var name = member.name;
+                    var memberName = name && ts.getPropertyNameForPropertyNameNode(name);
+                    if (name && memberName) {
+                        switch (member.kind) {
+                            case 156 /* GetAccessor */:
+                                addName(names, name, memberName, 1 /* Getter */);
+                                break;
+                            case 157 /* SetAccessor */:
+                                addName(names, name, memberName, 2 /* Setter */);
+                                break;
+                            case 152 /* PropertyDeclaration */:
+                                addName(names, name, memberName, 3 /* Property */);
+                                break;
+                            case 154 /* MethodDeclaration */:
+                                addName(names, name, memberName, 4 /* Method */);
+                                break;
+                        }
+                    }
+                }
+            }
+            function addName(names, location, name, meaning) {
+                var prev = names.get(name);
+                if (prev) {
+                    if (prev & 4 /* Method */) {
+                        if (meaning !== 4 /* Method */) {
+                            error(location, ts.Diagnostics.Duplicate_identifier_0, ts.getTextOfNode(location));
+                        }
+                    }
+                    else if (prev & meaning) {
+                        error(location, ts.Diagnostics.Duplicate_identifier_0, ts.getTextOfNode(location));
+                    }
+                    else {
+                        names.set(name, prev | meaning);
+                    }
+                }
+                else {
+                    names.set(name, meaning);
+                }
+            }
+        }
+        /**
+         * Static members being set on a constructor function may conflict with built-in properties
+         * of Function. Esp. in ECMAScript 5 there are non-configurable and non-writable
+         * built-in properties. This check issues a transpile error when a class has a static
+         * member with the same name as a non-writable built-in property.
+         *
+         * @see http://www.ecma-international.org/ecma-262/5.1/#sec-15.3.3
+         * @see http://www.ecma-international.org/ecma-262/5.1/#sec-15.3.5
+         * @see http://www.ecma-international.org/ecma-262/6.0/#sec-properties-of-the-function-constructor
+         * @see http://www.ecma-international.org/ecma-262/6.0/#sec-function-instances
+         */
+        function checkClassForStaticPropertyNameConflicts(node) {
+            for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
+                var member = _a[_i];
+                var memberNameNode = member.name;
+                var isStatic = ts.hasModifier(member, 32 /* Static */);
+                if (isStatic && memberNameNode) {
+                    var memberName = ts.getPropertyNameForPropertyNameNode(memberNameNode);
+                    switch (memberName) {
+                        case "name":
+                        case "length":
+                        case "caller":
+                        case "arguments":
+                        case "prototype":
+                            var message = ts.Diagnostics.Static_property_0_conflicts_with_built_in_property_Function_0_of_constructor_function_1;
+                            var className = getNameOfSymbolAsWritten(getSymbolOfNode(node));
+                            error(memberNameNode, message, memberName, className);
+                            break;
+                    }
+                }
+            }
+        }
+        function checkObjectTypeForDuplicateDeclarations(node) {
+            var names = ts.createMap();
+            for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
+                var member = _a[_i];
+                if (member.kind === 151 /* PropertySignature */) {
+                    var memberName = void 0;
+                    var name = member.name;
+                    switch (name.kind) {
+                        case 9 /* StringLiteral */:
+                        case 8 /* NumericLiteral */:
+                            memberName = name.text;
+                            break;
+                        case 71 /* Identifier */:
+                            memberName = ts.idText(name);
+                            break;
+                        default:
+                            continue;
+                    }
+                    if (names.get(memberName)) {
+                        error(ts.getNameOfDeclaration(member.symbol.valueDeclaration), ts.Diagnostics.Duplicate_identifier_0, memberName);
+                        error(member.name, ts.Diagnostics.Duplicate_identifier_0, memberName);
+                    }
+                    else {
+                        names.set(memberName, true);
+                    }
+                }
+            }
+        }
+        function checkTypeForDuplicateIndexSignatures(node) {
+            if (node.kind === 236 /* InterfaceDeclaration */) {
+                var nodeSymbol = getSymbolOfNode(node);
+                // in case of merging interface declaration it is possible that we'll enter this check procedure several times for every declaration
+                // to prevent this run check only for the first declaration of a given kind
+                if (nodeSymbol.declarations.length > 0 && nodeSymbol.declarations[0] !== node) {
+                    return;
+                }
+            }
+            // TypeScript 1.0 spec (April 2014)
+            // 3.7.4: An object type can contain at most one string index signature and one numeric index signature.
+            // 8.5: A class declaration can have at most one string index member declaration and one numeric index member declaration
+            var indexSymbol = getIndexSymbol(getSymbolOfNode(node));
+            if (indexSymbol) {
+                var seenNumericIndexer = false;
+                var seenStringIndexer = false;
+                for (var _i = 0, _a = indexSymbol.declarations; _i < _a.length; _i++) {
+                    var decl = _a[_i];
+                    var declaration = decl;
+                    if (declaration.parameters.length === 1 && declaration.parameters[0].type) {
+                        switch (declaration.parameters[0].type.kind) {
+                            case 137 /* StringKeyword */:
+                                if (!seenStringIndexer) {
+                                    seenStringIndexer = true;
+                                }
+                                else {
+                                    error(declaration, ts.Diagnostics.Duplicate_string_index_signature);
+                                }
+                                break;
+                            case 134 /* NumberKeyword */:
+                                if (!seenNumericIndexer) {
+                                    seenNumericIndexer = true;
+                                }
+                                else {
+                                    error(declaration, ts.Diagnostics.Duplicate_number_index_signature);
+                                }
+                                break;
+                        }
+                    }
+                }
+            }
+        }
+        function checkPropertyDeclaration(node) {
+            // Grammar checking
+            if (!checkGrammarDecoratorsAndModifiers(node) && !checkGrammarProperty(node))
+                checkGrammarComputedPropertyName(node.name);
+            checkVariableLikeDeclaration(node);
+        }
+        function checkMethodDeclaration(node) {
+            // Grammar checking
+            if (!checkGrammarMethod(node))
+                checkGrammarComputedPropertyName(node.name);
+            // Grammar checking for modifiers is done inside the function checkGrammarFunctionLikeDeclaration
+            checkFunctionOrMethodDeclaration(node);
+            // Abstract methods cannot have an implementation.
+            // Extra checks are to avoid reporting multiple errors relating to the "abstractness" of the node.
+            if (ts.hasModifier(node, 128 /* Abstract */) && node.kind === 154 /* MethodDeclaration */ && node.body) {
+                error(node, ts.Diagnostics.Method_0_cannot_have_an_implementation_because_it_is_marked_abstract, ts.declarationNameToString(node.name));
+            }
+        }
+        function checkConstructorDeclaration(node) {
+            // Grammar check on signature of constructor and modifier of the constructor is done in checkSignatureDeclaration function.
+            checkSignatureDeclaration(node);
+            // Grammar check for checking only related to constructorDeclaration
+            if (!checkGrammarConstructorTypeParameters(node))
+                checkGrammarConstructorTypeAnnotation(node);
+            checkSourceElement(node.body);
+            var symbol = getSymbolOfNode(node);
+            var firstDeclaration = ts.getDeclarationOfKind(symbol, node.kind);
+            // Only type check the symbol once
+            if (node === firstDeclaration) {
+                checkFunctionOrConstructorSymbol(symbol);
+            }
+            // exit early in the case of signature - super checks are not relevant to them
+            if (ts.nodeIsMissing(node.body)) {
+                return;
+            }
+            if (!produceDiagnostics) {
+                return;
+            }
+            function isInstancePropertyWithInitializer(n) {
+                return n.kind === 152 /* PropertyDeclaration */ &&
+                    !ts.hasModifier(n, 32 /* Static */) &&
+                    !!n.initializer;
+            }
+            // TS 1.0 spec (April 2014): 8.3.2
+            // Constructors of classes with no extends clause may not contain super calls, whereas
+            // constructors of derived classes must contain at least one super call somewhere in their function body.
+            var containingClassDecl = node.parent;
+            if (ts.getClassExtendsHeritageClauseElement(containingClassDecl)) {
+                captureLexicalThis(node.parent, containingClassDecl);
+                var classExtendsNull = classDeclarationExtendsNull(containingClassDecl);
+                var superCall = getSuperCallInConstructor(node);
+                if (superCall) {
+                    if (classExtendsNull) {
+                        error(superCall, ts.Diagnostics.A_constructor_cannot_contain_a_super_call_when_its_class_extends_null);
+                    }
+                    // The first statement in the body of a constructor (excluding prologue directives) must be a super call
+                    // if both of the following are true:
+                    // - The containing class is a derived class.
+                    // - The constructor declares parameter properties
+                    //   or the containing class declares instance member variables with initializers.
+                    var superCallShouldBeFirst = ts.some(node.parent.members, isInstancePropertyWithInitializer) ||
+                        ts.some(node.parameters, function (p) { return ts.hasModifier(p, 92 /* ParameterPropertyModifier */); });
+                    // Skip past any prologue directives to find the first statement
+                    // to ensure that it was a super call.
+                    if (superCallShouldBeFirst) {
+                        var statements = node.body.statements;
+                        var superCallStatement = void 0;
+                        for (var _i = 0, statements_2 = statements; _i < statements_2.length; _i++) {
+                            var statement = statements_2[_i];
+                            if (statement.kind === 216 /* ExpressionStatement */ && ts.isSuperCall(statement.expression)) {
+                                superCallStatement = statement;
+                                break;
+                            }
+                            if (!ts.isPrologueDirective(statement)) {
+                                break;
+                            }
+                        }
+                        if (!superCallStatement) {
+                            error(node, ts.Diagnostics.A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_properties_or_has_parameter_properties);
+                        }
+                    }
+                }
+                else if (!classExtendsNull) {
+                    error(node, ts.Diagnostics.Constructors_for_derived_classes_must_contain_a_super_call);
+                }
+            }
+        }
+        function checkAccessorDeclaration(node) {
+            if (produceDiagnostics) {
+                // Grammar checking accessors
+                if (!checkGrammarFunctionLikeDeclaration(node) && !checkGrammarAccessor(node))
+                    checkGrammarComputedPropertyName(node.name);
+                checkDecorators(node);
+                checkSignatureDeclaration(node);
+                if (node.kind === 156 /* GetAccessor */) {
+                    if (!(node.flags & 4194304 /* Ambient */) && ts.nodeIsPresent(node.body) && (node.flags & 128 /* HasImplicitReturn */)) {
+                        if (!(node.flags & 256 /* HasExplicitReturn */)) {
+                            error(node.name, ts.Diagnostics.A_get_accessor_must_return_a_value);
+                        }
+                    }
+                }
+                // Do not use hasDynamicName here, because that returns false for well known symbols.
+                // We want to perform checkComputedPropertyName for all computed properties, including
+                // well known symbols.
+                if (node.name.kind === 147 /* ComputedPropertyName */) {
+                    checkComputedPropertyName(node.name);
+                }
+                if (!hasNonBindableDynamicName(node)) {
+                    // TypeScript 1.0 spec (April 2014): 8.4.3
+                    // Accessors for the same member name must specify the same accessibility.
+                    var otherKind = node.kind === 156 /* GetAccessor */ ? 157 /* SetAccessor */ : 156 /* GetAccessor */;
+                    var otherAccessor = ts.getDeclarationOfKind(getSymbolOfNode(node), otherKind);
+                    if (otherAccessor) {
+                        var nodeFlags = ts.getModifierFlags(node);
+                        var otherFlags = ts.getModifierFlags(otherAccessor);
+                        if ((nodeFlags & 28 /* AccessibilityModifier */) !== (otherFlags & 28 /* AccessibilityModifier */)) {
+                            error(node.name, ts.Diagnostics.Getter_and_setter_accessors_do_not_agree_in_visibility);
+                        }
+                        if ((nodeFlags & 128 /* Abstract */) !== (otherFlags & 128 /* Abstract */)) {
+                            error(node.name, ts.Diagnostics.Accessors_must_both_be_abstract_or_non_abstract);
+                        }
+                        // TypeScript 1.0 spec (April 2014): 4.5
+                        // If both accessors include type annotations, the specified types must be identical.
+                        checkAccessorDeclarationTypesIdentical(node, otherAccessor, getAnnotatedAccessorType, ts.Diagnostics.get_and_set_accessor_must_have_the_same_type);
+                        checkAccessorDeclarationTypesIdentical(node, otherAccessor, getThisTypeOfDeclaration, ts.Diagnostics.get_and_set_accessor_must_have_the_same_this_type);
+                    }
+                }
+                var returnType = getTypeOfAccessors(getSymbolOfNode(node));
+                if (node.kind === 156 /* GetAccessor */) {
+                    checkAllCodePathsInNonVoidFunctionReturnOrThrow(node, returnType);
+                }
+            }
+            checkSourceElement(node.body);
+        }
+        function checkAccessorDeclarationTypesIdentical(first, second, getAnnotatedType, message) {
+            var firstType = getAnnotatedType(first);
+            var secondType = getAnnotatedType(second);
+            if (firstType && secondType && !isTypeIdenticalTo(firstType, secondType)) {
+                error(first, message);
+            }
+        }
+        function checkMissingDeclaration(node) {
+            checkDecorators(node);
+        }
+        function getEffectiveTypeArguments(node, typeParameters) {
+            return fillMissingTypeArguments(ts.map(node.typeArguments, getTypeFromTypeNode), typeParameters, getMinTypeArgumentCount(typeParameters), ts.isInJavaScriptFile(node));
+        }
+        function checkTypeArgumentConstraints(node, typeParameters) {
+            var typeArguments;
+            var mapper;
+            var result = true;
+            for (var i = 0; i < typeParameters.length; i++) {
+                var constraint = getConstraintOfTypeParameter(typeParameters[i]);
+                if (constraint) {
+                    if (!typeArguments) {
+                        typeArguments = getEffectiveTypeArguments(node, typeParameters);
+                        mapper = createTypeMapper(typeParameters, typeArguments);
+                    }
+                    result = result && checkTypeAssignableTo(typeArguments[i], instantiateType(constraint, mapper), node.typeArguments[i], ts.Diagnostics.Type_0_does_not_satisfy_the_constraint_1);
+                }
+            }
+            return result;
+        }
+        function getTypeParametersForTypeReference(node) {
+            var type = getTypeFromTypeReference(node);
+            if (type !== errorType) {
+                var symbol = getNodeLinks(node).resolvedSymbol;
+                if (symbol) {
+                    return symbol.flags & 524288 /* TypeAlias */ && getSymbolLinks(symbol).typeParameters ||
+                        (ts.getObjectFlags(type) & 4 /* Reference */ ? type.target.localTypeParameters : undefined);
+                }
+            }
+            return undefined;
+        }
+        function checkTypeReferenceNode(node) {
+            checkGrammarTypeArguments(node, node.typeArguments);
+            if (node.kind === 162 /* TypeReference */ && node.typeName.jsdocDotPos !== undefined && !ts.isInJavaScriptFile(node) && !ts.isInJSDoc(node)) {
+                grammarErrorAtPos(node, node.typeName.jsdocDotPos, 1, ts.Diagnostics.JSDoc_types_can_only_be_used_inside_documentation_comments);
+            }
+            var type = getTypeFromTypeReference(node);
+            if (type !== errorType) {
+                if (node.typeArguments) {
+                    // Do type argument local checks only if referenced type is successfully resolved
+                    ts.forEach(node.typeArguments, checkSourceElement);
+                    if (produceDiagnostics) {
+                        var typeParameters = getTypeParametersForTypeReference(node);
+                        if (typeParameters) {
+                            checkTypeArgumentConstraints(node, typeParameters);
+                        }
+                    }
+                }
+                if (type.flags & 32 /* Enum */ && getNodeLinks(node).resolvedSymbol.flags & 8 /* EnumMember */) {
+                    error(node, ts.Diagnostics.Enum_type_0_has_members_with_initializers_that_are_not_literals, typeToString(type));
+                }
+            }
+        }
+        function getTypeArgumentConstraint(node) {
+            var typeReferenceNode = ts.tryCast(node.parent, ts.isTypeReferenceType);
+            if (!typeReferenceNode)
+                return undefined;
+            var typeParameters = getTypeParametersForTypeReference(typeReferenceNode); // TODO: GH#18217
+            var constraint = getConstraintOfTypeParameter(typeParameters[typeReferenceNode.typeArguments.indexOf(node)]);
+            return constraint && instantiateType(constraint, createTypeMapper(typeParameters, getEffectiveTypeArguments(typeReferenceNode, typeParameters)));
+        }
+        function checkTypeQuery(node) {
+            getTypeFromTypeQueryNode(node);
+        }
+        function checkTypeLiteral(node) {
+            ts.forEach(node.members, checkSourceElement);
+            if (produceDiagnostics) {
+                var type = getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node);
+                checkIndexConstraints(type);
+                checkTypeForDuplicateIndexSignatures(node);
+                checkObjectTypeForDuplicateDeclarations(node);
+            }
+        }
+        function checkArrayType(node) {
+            checkSourceElement(node.elementType);
+        }
+        function checkTupleType(node) {
+            // Grammar checking
+            var hasErrorFromDisallowedTrailingComma = checkGrammarForDisallowedTrailingComma(node.elementTypes);
+            if (!hasErrorFromDisallowedTrailingComma && node.elementTypes.length === 0) {
+                grammarErrorOnNode(node, ts.Diagnostics.A_tuple_type_element_list_cannot_be_empty);
+            }
+            ts.forEach(node.elementTypes, checkSourceElement);
+        }
+        function checkUnionOrIntersectionType(node) {
+            ts.forEach(node.types, checkSourceElement);
+        }
+        function checkIndexedAccessIndexType(type, accessNode) {
+            if (!(type.flags & 2097152 /* IndexedAccess */)) {
+                return type;
+            }
+            // Check if the index type is assignable to 'keyof T' for the object type.
+            var objectType = type.objectType;
+            var indexType = type.indexType;
+            if (isTypeAssignableTo(indexType, getIndexType(objectType, /*stringsOnly*/ false))) {
+                if (accessNode.kind === 186 /* ElementAccessExpression */ && ts.isAssignmentTarget(accessNode) &&
+                    ts.getObjectFlags(objectType) & 32 /* Mapped */ && getMappedTypeModifiers(objectType) & 1 /* IncludeReadonly */) {
+                    error(accessNode, ts.Diagnostics.Index_signature_in_type_0_only_permits_reading, typeToString(objectType));
+                }
+                return type;
+            }
+            // Check if we're indexing with a numeric type and if either object or index types
+            // is a generic type with a constraint that has a numeric index signature.
+            if (getIndexInfoOfType(getApparentType(objectType), 1 /* Number */) && isTypeAssignableToKind(indexType, 168 /* NumberLike */)) {
+                return type;
+            }
+            error(accessNode, ts.Diagnostics.Type_0_cannot_be_used_to_index_type_1, typeToString(indexType), typeToString(objectType));
+            return type;
+        }
+        function checkIndexedAccessType(node) {
+            checkSourceElement(node.objectType);
+            checkSourceElement(node.indexType);
+            checkIndexedAccessIndexType(getTypeFromIndexedAccessTypeNode(node), node);
+        }
+        function checkMappedType(node) {
+            checkSourceElement(node.typeParameter);
+            checkSourceElement(node.type);
+            if (noImplicitAny && !node.type) {
+                reportImplicitAnyError(node, anyType);
+            }
+            var type = getTypeFromMappedTypeNode(node);
+            var constraintType = getConstraintTypeFromMappedType(type);
+            checkTypeAssignableTo(constraintType, keyofConstraintType, node.typeParameter.constraint);
+        }
+        function checkTypeOperator(node) {
+            checkGrammarTypeOperatorNode(node);
+            checkSourceElement(node.type);
+        }
+        function checkConditionalType(node) {
+            ts.forEachChild(node, checkSourceElement);
+        }
+        function checkInferType(node) {
+            if (!ts.findAncestor(node, function (n) { return n.parent && n.parent.kind === 171 /* ConditionalType */ && n.parent.extendsType === n; })) {
+                grammarErrorOnNode(node, ts.Diagnostics.infer_declarations_are_only_permitted_in_the_extends_clause_of_a_conditional_type);
+            }
+            checkSourceElement(node.typeParameter);
+        }
+        function checkImportType(node) {
+            checkSourceElement(node.argument);
+            getTypeFromTypeNode(node);
+        }
+        function isPrivateWithinAmbient(node) {
+            return ts.hasModifier(node, 8 /* Private */) && !!(node.flags & 4194304 /* Ambient */);
+        }
+        function getEffectiveDeclarationFlags(n, flagsToCheck) {
+            var flags = ts.getCombinedModifierFlags(n);
+            // children of classes (even ambient classes) should not be marked as ambient or export
+            // because those flags have no useful semantics there.
+            if (n.parent.kind !== 236 /* InterfaceDeclaration */ &&
+                n.parent.kind !== 235 /* ClassDeclaration */ &&
+                n.parent.kind !== 205 /* ClassExpression */ &&
+                n.flags & 4194304 /* Ambient */) {
+                if (!(flags & 2 /* Ambient */) && !(ts.isModuleBlock(n.parent) && ts.isModuleDeclaration(n.parent.parent) && ts.isGlobalScopeAugmentation(n.parent.parent))) {
+                    // It is nested in an ambient context, which means it is automatically exported
+                    flags |= 1 /* Export */;
+                }
+                flags |= 2 /* Ambient */;
+            }
+            return flags & flagsToCheck;
+        }
+        function checkFunctionOrConstructorSymbol(symbol) {
+            if (!produceDiagnostics) {
+                return;
+            }
+            function getCanonicalOverload(overloads, implementation) {
+                // Consider the canonical set of flags to be the flags of the bodyDeclaration or the first declaration
+                // Error on all deviations from this canonical set of flags
+                // The caveat is that if some overloads are defined in lib.d.ts, we don't want to
+                // report the errors on those. To achieve this, we will say that the implementation is
+                // the canonical signature only if it is in the same container as the first overload
+                var implementationSharesContainerWithFirstOverload = implementation !== undefined && implementation.parent === overloads[0].parent;
+                return implementationSharesContainerWithFirstOverload ? implementation : overloads[0];
+            }
+            function checkFlagAgreementBetweenOverloads(overloads, implementation, flagsToCheck, someOverloadFlags, allOverloadFlags) {
+                // Error if some overloads have a flag that is not shared by all overloads. To find the
+                // deviations, we XOR someOverloadFlags with allOverloadFlags
+                var someButNotAllOverloadFlags = someOverloadFlags ^ allOverloadFlags;
+                if (someButNotAllOverloadFlags !== 0) {
+                    var canonicalFlags_1 = getEffectiveDeclarationFlags(getCanonicalOverload(overloads, implementation), flagsToCheck);
+                    ts.forEach(overloads, function (o) {
+                        var deviation = getEffectiveDeclarationFlags(o, flagsToCheck) ^ canonicalFlags_1;
+                        if (deviation & 1 /* Export */) {
+                            error(ts.getNameOfDeclaration(o), ts.Diagnostics.Overload_signatures_must_all_be_exported_or_non_exported);
+                        }
+                        else if (deviation & 2 /* Ambient */) {
+                            error(ts.getNameOfDeclaration(o), ts.Diagnostics.Overload_signatures_must_all_be_ambient_or_non_ambient);
+                        }
+                        else if (deviation & (8 /* Private */ | 16 /* Protected */)) {
+                            error(ts.getNameOfDeclaration(o) || o, ts.Diagnostics.Overload_signatures_must_all_be_public_private_or_protected);
+                        }
+                        else if (deviation & 128 /* Abstract */) {
+                            error(ts.getNameOfDeclaration(o), ts.Diagnostics.Overload_signatures_must_all_be_abstract_or_non_abstract);
+                        }
+                    });
+                }
+            }
+            function checkQuestionTokenAgreementBetweenOverloads(overloads, implementation, someHaveQuestionToken, allHaveQuestionToken) {
+                if (someHaveQuestionToken !== allHaveQuestionToken) {
+                    var canonicalHasQuestionToken_1 = ts.hasQuestionToken(getCanonicalOverload(overloads, implementation));
+                    ts.forEach(overloads, function (o) {
+                        var deviation = ts.hasQuestionToken(o) !== canonicalHasQuestionToken_1;
+                        if (deviation) {
+                            error(ts.getNameOfDeclaration(o), ts.Diagnostics.Overload_signatures_must_all_be_optional_or_required);
+                        }
+                    });
+                }
+            }
+            var flagsToCheck = 1 /* Export */ | 2 /* Ambient */ | 8 /* Private */ | 16 /* Protected */ | 128 /* Abstract */;
+            var someNodeFlags = 0 /* None */;
+            var allNodeFlags = flagsToCheck;
+            var someHaveQuestionToken = false;
+            var allHaveQuestionToken = true;
+            var hasOverloads = false;
+            var bodyDeclaration;
+            var lastSeenNonAmbientDeclaration;
+            var previousDeclaration;
+            var declarations = symbol.declarations;
+            var isConstructor = (symbol.flags & 16384 /* Constructor */) !== 0;
+            function reportImplementationExpectedError(node) {
+                if (node.name && ts.nodeIsMissing(node.name)) {
+                    return;
+                }
+                var seen = false;
+                var subsequentNode = ts.forEachChild(node.parent, function (c) {
+                    if (seen) {
+                        return c;
+                    }
+                    else {
+                        seen = c === node;
+                    }
+                });
+                // We may be here because of some extra nodes between overloads that could not be parsed into a valid node.
+                // In this case the subsequent node is not really consecutive (.pos !== node.end), and we must ignore it here.
+                if (subsequentNode && subsequentNode.pos === node.end) {
+                    if (subsequentNode.kind === node.kind) {
+                        var errorNode_1 = subsequentNode.name || subsequentNode;
+                        // TODO: GH#17345: These are methods, so handle computed name case. (`Always allowing computed property names is *not* the correct behavior!)
+                        var subsequentName = subsequentNode.name;
+                        if (node.name && subsequentName &&
+                            (ts.isComputedPropertyName(node.name) && ts.isComputedPropertyName(subsequentName) ||
+                                !ts.isComputedPropertyName(node.name) && !ts.isComputedPropertyName(subsequentName) && ts.getEscapedTextOfIdentifierOrLiteral(node.name) === ts.getEscapedTextOfIdentifierOrLiteral(subsequentName))) {
+                            var reportError = (node.kind === 154 /* MethodDeclaration */ || node.kind === 153 /* MethodSignature */) &&
+                                ts.hasModifier(node, 32 /* Static */) !== ts.hasModifier(subsequentNode, 32 /* Static */);
+                            // we can get here in two cases
+                            // 1. mixed static and instance class members
+                            // 2. something with the same name was defined before the set of overloads that prevents them from merging
+                            // here we'll report error only for the first case since for second we should already report error in binder
+                            if (reportError) {
+                                var diagnostic = ts.hasModifier(node, 32 /* Static */) ? ts.Diagnostics.Function_overload_must_be_static : ts.Diagnostics.Function_overload_must_not_be_static;
+                                error(errorNode_1, diagnostic);
+                            }
+                            return;
+                        }
+                        else if (ts.nodeIsPresent(subsequentNode.body)) {
+                            error(errorNode_1, ts.Diagnostics.Function_implementation_name_must_be_0, ts.declarationNameToString(node.name));
+                            return;
+                        }
+                    }
+                }
+                var errorNode = node.name || node;
+                if (isConstructor) {
+                    error(errorNode, ts.Diagnostics.Constructor_implementation_is_missing);
+                }
+                else {
+                    // Report different errors regarding non-consecutive blocks of declarations depending on whether
+                    // the node in question is abstract.
+                    if (ts.hasModifier(node, 128 /* Abstract */)) {
+                        error(errorNode, ts.Diagnostics.All_declarations_of_an_abstract_method_must_be_consecutive);
+                    }
+                    else {
+                        error(errorNode, ts.Diagnostics.Function_implementation_is_missing_or_not_immediately_following_the_declaration);
+                    }
+                }
+            }
+            var duplicateFunctionDeclaration = false;
+            var multipleConstructorImplementation = false;
+            for (var _i = 0, declarations_4 = declarations; _i < declarations_4.length; _i++) {
+                var current = declarations_4[_i];
+                var node = current;
+                var inAmbientContext = node.flags & 4194304 /* Ambient */;
+                var inAmbientContextOrInterface = node.parent.kind === 236 /* InterfaceDeclaration */ || node.parent.kind === 166 /* TypeLiteral */ || inAmbientContext;
+                if (inAmbientContextOrInterface) {
+                    // check if declarations are consecutive only if they are non-ambient
+                    // 1. ambient declarations can be interleaved
+                    // i.e. this is legal
+                    //     declare function foo();
+                    //     declare function bar();
+                    //     declare function foo();
+                    // 2. mixing ambient and non-ambient declarations is a separate error that will be reported - do not want to report an extra one
+                    previousDeclaration = undefined;
+                }
+                if (node.kind === 234 /* FunctionDeclaration */ || node.kind === 154 /* MethodDeclaration */ || node.kind === 153 /* MethodSignature */ || node.kind === 155 /* Constructor */) {
+                    var currentNodeFlags = getEffectiveDeclarationFlags(node, flagsToCheck);
+                    someNodeFlags |= currentNodeFlags;
+                    allNodeFlags &= currentNodeFlags;
+                    someHaveQuestionToken = someHaveQuestionToken || ts.hasQuestionToken(node);
+                    allHaveQuestionToken = allHaveQuestionToken && ts.hasQuestionToken(node);
+                    if (ts.nodeIsPresent(node.body) && bodyDeclaration) {
+                        if (isConstructor) {
+                            multipleConstructorImplementation = true;
+                        }
+                        else {
+                            duplicateFunctionDeclaration = true;
+                        }
+                    }
+                    else if (previousDeclaration && previousDeclaration.parent === node.parent && previousDeclaration.end !== node.pos) {
+                        reportImplementationExpectedError(previousDeclaration);
+                    }
+                    if (ts.nodeIsPresent(node.body)) {
+                        if (!bodyDeclaration) {
+                            bodyDeclaration = node;
+                        }
+                    }
+                    else {
+                        hasOverloads = true;
+                    }
+                    previousDeclaration = node;
+                    if (!inAmbientContextOrInterface) {
+                        lastSeenNonAmbientDeclaration = node;
+                    }
+                }
+            }
+            if (multipleConstructorImplementation) {
+                ts.forEach(declarations, function (declaration) {
+                    error(declaration, ts.Diagnostics.Multiple_constructor_implementations_are_not_allowed);
+                });
+            }
+            if (duplicateFunctionDeclaration) {
+                ts.forEach(declarations, function (declaration) {
+                    error(ts.getNameOfDeclaration(declaration), ts.Diagnostics.Duplicate_function_implementation);
+                });
+            }
+            // Abstract methods can't have an implementation -- in particular, they don't need one.
+            if (lastSeenNonAmbientDeclaration && !lastSeenNonAmbientDeclaration.body &&
+                !ts.hasModifier(lastSeenNonAmbientDeclaration, 128 /* Abstract */) && !lastSeenNonAmbientDeclaration.questionToken) {
+                reportImplementationExpectedError(lastSeenNonAmbientDeclaration);
+            }
+            if (hasOverloads) {
+                checkFlagAgreementBetweenOverloads(declarations, bodyDeclaration, flagsToCheck, someNodeFlags, allNodeFlags);
+                checkQuestionTokenAgreementBetweenOverloads(declarations, bodyDeclaration, someHaveQuestionToken, allHaveQuestionToken);
+                if (bodyDeclaration) {
+                    var signatures = getSignaturesOfSymbol(symbol);
+                    var bodySignature = getSignatureFromDeclaration(bodyDeclaration);
+                    for (var _a = 0, signatures_7 = signatures; _a < signatures_7.length; _a++) {
+                        var signature = signatures_7[_a];
+                        if (!isImplementationCompatibleWithOverload(bodySignature, signature)) {
+                            error(signature.declaration, ts.Diagnostics.Overload_signature_is_not_compatible_with_function_implementation);
+                            break;
+                        }
+                    }
+                }
+            }
+        }
+        function checkExportsOnMergedDeclarations(node) {
+            if (!produceDiagnostics) {
+                return;
+            }
+            // if localSymbol is defined on node then node itself is exported - check is required
+            var symbol = node.localSymbol;
+            if (!symbol) {
+                // local symbol is undefined => this declaration is non-exported.
+                // however symbol might contain other declarations that are exported
+                symbol = getSymbolOfNode(node);
+                if (!symbol.exportSymbol) {
+                    // this is a pure local symbol (all declarations are non-exported) - no need to check anything
+                    return;
+                }
+            }
+            // run the check only for the first declaration in the list
+            if (ts.getDeclarationOfKind(symbol, node.kind) !== node) {
+                return;
+            }
+            var exportedDeclarationSpaces = 0 /* None */;
+            var nonExportedDeclarationSpaces = 0 /* None */;
+            var defaultExportedDeclarationSpaces = 0 /* None */;
+            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                var d = _a[_i];
+                var declarationSpaces = getDeclarationSpaces(d);
+                var effectiveDeclarationFlags = getEffectiveDeclarationFlags(d, 1 /* Export */ | 512 /* Default */);
+                if (effectiveDeclarationFlags & 1 /* Export */) {
+                    if (effectiveDeclarationFlags & 512 /* Default */) {
+                        defaultExportedDeclarationSpaces |= declarationSpaces;
+                    }
+                    else {
+                        exportedDeclarationSpaces |= declarationSpaces;
+                    }
+                }
+                else {
+                    nonExportedDeclarationSpaces |= declarationSpaces;
+                }
+            }
+            // Spaces for anything not declared a 'default export'.
+            var nonDefaultExportedDeclarationSpaces = exportedDeclarationSpaces | nonExportedDeclarationSpaces;
+            var commonDeclarationSpacesForExportsAndLocals = exportedDeclarationSpaces & nonExportedDeclarationSpaces;
+            var commonDeclarationSpacesForDefaultAndNonDefault = defaultExportedDeclarationSpaces & nonDefaultExportedDeclarationSpaces;
+            if (commonDeclarationSpacesForExportsAndLocals || commonDeclarationSpacesForDefaultAndNonDefault) {
+                // declaration spaces for exported and non-exported declarations intersect
+                for (var _b = 0, _c = symbol.declarations; _b < _c.length; _b++) {
+                    var d = _c[_b];
+                    var declarationSpaces = getDeclarationSpaces(d);
+                    var name = ts.getNameOfDeclaration(d);
+                    // Only error on the declarations that contributed to the intersecting spaces.
+                    if (declarationSpaces & commonDeclarationSpacesForDefaultAndNonDefault) {
+                        error(name, ts.Diagnostics.Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead, ts.declarationNameToString(name));
+                    }
+                    else if (declarationSpaces & commonDeclarationSpacesForExportsAndLocals) {
+                        error(name, ts.Diagnostics.Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local, ts.declarationNameToString(name));
+                    }
+                }
+            }
+            var DeclarationSpaces;
+            (function (DeclarationSpaces) {
+                DeclarationSpaces[DeclarationSpaces["None"] = 0] = "None";
+                DeclarationSpaces[DeclarationSpaces["ExportValue"] = 1] = "ExportValue";
+                DeclarationSpaces[DeclarationSpaces["ExportType"] = 2] = "ExportType";
+                DeclarationSpaces[DeclarationSpaces["ExportNamespace"] = 4] = "ExportNamespace";
+            })(DeclarationSpaces || (DeclarationSpaces = {}));
+            function getDeclarationSpaces(decl) {
+                var d = decl;
+                switch (d.kind) {
+                    case 236 /* InterfaceDeclaration */:
+                    case 237 /* TypeAliasDeclaration */:
+                    // A jsdoc typedef and callback are, by definition, type aliases
+                    case 297 /* JSDocTypedefTag */:
+                    case 292 /* JSDocCallbackTag */:
+                        return 2 /* ExportType */;
+                    case 239 /* ModuleDeclaration */:
+                        return ts.isAmbientModule(d) || ts.getModuleInstanceState(d) !== 0 /* NonInstantiated */
+                            ? 4 /* ExportNamespace */ | 1 /* ExportValue */
+                            : 4 /* ExportNamespace */;
+                    case 235 /* ClassDeclaration */:
+                    case 238 /* EnumDeclaration */:
+                        return 2 /* ExportType */ | 1 /* ExportValue */;
+                    case 274 /* SourceFile */:
+                        return 2 /* ExportType */ | 1 /* ExportValue */ | 4 /* ExportNamespace */;
+                    case 249 /* ExportAssignment */:
+                        // Export assigned entity name expressions act as aliases and should fall through, otherwise they export values
+                        if (!ts.isEntityNameExpression(d.expression)) {
+                            return 1 /* ExportValue */;
+                        }
+                        d = d.expression;
+                    /* falls through */
+                    // The below options all declare an Alias, which is allowed to merge with other values within the importing module
+                    case 243 /* ImportEqualsDeclaration */:
+                    case 246 /* NamespaceImport */:
+                    case 245 /* ImportClause */:
+                        var result_3 = 0 /* None */;
+                        var target = resolveAlias(getSymbolOfNode(d));
+                        ts.forEach(target.declarations, function (d) { result_3 |= getDeclarationSpaces(d); });
+                        return result_3;
+                    case 232 /* VariableDeclaration */:
+                    case 182 /* BindingElement */:
+                    case 234 /* FunctionDeclaration */:
+                    case 248 /* ImportSpecifier */: // https://github.com/Microsoft/TypeScript/pull/7591
+                        return 1 /* ExportValue */;
+                    default:
+                        return ts.Debug.fail(ts.Debug.showSyntaxKind(d));
+                }
+            }
+        }
+        function getAwaitedTypeOfPromise(type, errorNode, diagnosticMessage) {
+            var promisedType = getPromisedTypeOfPromise(type, errorNode);
+            return promisedType && getAwaitedType(promisedType, errorNode, diagnosticMessage);
+        }
+        /**
+         * Gets the "promised type" of a promise.
+         * @param type The type of the promise.
+         * @remarks The "promised type" of a type is the type of the "value" parameter of the "onfulfilled" callback.
+         */
+        function getPromisedTypeOfPromise(promise, errorNode) {
+            //
+            //  { // promise
+            //      then( // thenFunction
+            //          onfulfilled: ( // onfulfilledParameterType
+            //              value: T // valueParameterType
+            //          ) => any
+            //      ): any;
+            //  }
+            //
+            if (isTypeAny(promise)) {
+                return undefined;
+            }
+            var typeAsPromise = promise;
+            if (typeAsPromise.promisedTypeOfPromise) {
+                return typeAsPromise.promisedTypeOfPromise;
+            }
+            if (isReferenceToType(promise, getGlobalPromiseType(/*reportErrors*/ false))) {
+                return typeAsPromise.promisedTypeOfPromise = promise.typeArguments[0];
+            }
+            var thenFunction = getTypeOfPropertyOfType(promise, "then"); // TODO: GH#18217
+            if (isTypeAny(thenFunction)) {
+                return undefined;
+            }
+            var thenSignatures = thenFunction ? getSignaturesOfType(thenFunction, 0 /* Call */) : ts.emptyArray;
+            if (thenSignatures.length === 0) {
+                if (errorNode) {
+                    error(errorNode, ts.Diagnostics.A_promise_must_have_a_then_method);
+                }
+                return undefined;
+            }
+            var onfulfilledParameterType = getTypeWithFacts(getUnionType(ts.map(thenSignatures, getTypeOfFirstParameterOfSignature)), 524288 /* NEUndefinedOrNull */);
+            if (isTypeAny(onfulfilledParameterType)) {
+                return undefined;
+            }
+            var onfulfilledParameterSignatures = getSignaturesOfType(onfulfilledParameterType, 0 /* Call */);
+            if (onfulfilledParameterSignatures.length === 0) {
+                if (errorNode) {
+                    error(errorNode, ts.Diagnostics.The_first_parameter_of_the_then_method_of_a_promise_must_be_a_callback);
+                }
+                return undefined;
+            }
+            return typeAsPromise.promisedTypeOfPromise = getUnionType(ts.map(onfulfilledParameterSignatures, getTypeOfFirstParameterOfSignature), 2 /* Subtype */);
+        }
+        /**
+         * Gets the "awaited type" of a type.
+         * @param type The type to await.
+         * @remarks The "awaited type" of an expression is its "promised type" if the expression is a
+         * Promise-like type; otherwise, it is the type of the expression. This is used to reflect
+         * The runtime behavior of the `await` keyword.
+         */
+        function checkAwaitedType(type, errorNode, diagnosticMessage) {
+            return getAwaitedType(type, errorNode, diagnosticMessage) || errorType;
+        }
+        function getAwaitedType(type, errorNode, diagnosticMessage) {
+            var typeAsAwaitable = type;
+            if (typeAsAwaitable.awaitedTypeOfType) {
+                return typeAsAwaitable.awaitedTypeOfType;
+            }
+            if (isTypeAny(type)) {
+                return typeAsAwaitable.awaitedTypeOfType = type;
+            }
+            if (type.flags & 262144 /* Union */) {
+                var types = void 0;
+                for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                    var constituentType = _a[_i];
+                    types = ts.append(types, getAwaitedType(constituentType, errorNode, diagnosticMessage));
+                }
+                if (!types) {
+                    return undefined;
+                }
+                return typeAsAwaitable.awaitedTypeOfType = getUnionType(types);
+            }
+            var promisedType = getPromisedTypeOfPromise(type);
+            if (promisedType) {
+                if (type.id === promisedType.id || awaitedTypeStack.indexOf(promisedType.id) >= 0) {
+                    // Verify that we don't have a bad actor in the form of a promise whose
+                    // promised type is the same as the promise type, or a mutually recursive
+                    // promise. If so, we return undefined as we cannot guess the shape. If this
+                    // were the actual case in the JavaScript, this Promise would never resolve.
+                    //
+                    // An example of a bad actor with a singly-recursive promise type might
+                    // be:
+                    //
+                    //  interface BadPromise {
+                    //      then(
+                    //          onfulfilled: (value: BadPromise) => any,
+                    //          onrejected: (error: any) => any): BadPromise;
+                    //  }
+                    // The above interface will pass the PromiseLike check, and return a
+                    // promised type of `BadPromise`. Since this is a self reference, we
+                    // don't want to keep recursing ad infinitum.
+                    //
+                    // An example of a bad actor in the form of a mutually-recursive
+                    // promise type might be:
+                    //
+                    //  interface BadPromiseA {
+                    //      then(
+                    //          onfulfilled: (value: BadPromiseB) => any,
+                    //          onrejected: (error: any) => any): BadPromiseB;
+                    //  }
+                    //
+                    //  interface BadPromiseB {
+                    //      then(
+                    //          onfulfilled: (value: BadPromiseA) => any,
+                    //          onrejected: (error: any) => any): BadPromiseA;
+                    //  }
+                    //
+                    if (errorNode) {
+                        error(errorNode, ts.Diagnostics.Type_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method);
+                    }
+                    return undefined;
+                }
+                // Keep track of the type we're about to unwrap to avoid bad recursive promise types.
+                // See the comments above for more information.
+                awaitedTypeStack.push(type.id);
+                var awaitedType = getAwaitedType(promisedType, errorNode, diagnosticMessage);
+                awaitedTypeStack.pop();
+                if (!awaitedType) {
+                    return undefined;
+                }
+                return typeAsAwaitable.awaitedTypeOfType = awaitedType;
+            }
+            // The type was not a promise, so it could not be unwrapped any further.
+            // As long as the type does not have a callable "then" property, it is
+            // safe to return the type; otherwise, an error will be reported in
+            // the call to getNonThenableType and we will return undefined.
+            //
+            // An example of a non-promise "thenable" might be:
+            //
+            //  await { then(): void {} }
+            //
+            // The "thenable" does not match the minimal definition for a promise. When
+            // a Promise/A+-compatible or ES6 promise tries to adopt this value, the promise
+            // will never settle. We treat this as an error to help flag an early indicator
+            // of a runtime problem. If the user wants to return this value from an async
+            // function, they would need to wrap it in some other value. If they want it to
+            // be treated as a promise, they can cast to <any>.
+            var thenFunction = getTypeOfPropertyOfType(type, "then");
+            if (thenFunction && getSignaturesOfType(thenFunction, 0 /* Call */).length > 0) {
+                if (errorNode) {
+                    if (!diagnosticMessage)
+                        return ts.Debug.fail();
+                    error(errorNode, diagnosticMessage);
+                }
+                return undefined;
+            }
+            return typeAsAwaitable.awaitedTypeOfType = type;
+        }
+        /**
+         * Checks the return type of an async function to ensure it is a compatible
+         * Promise implementation.
+         *
+         * This checks that an async function has a valid Promise-compatible return type,
+         * and returns the *awaited type* of the promise. An async function has a valid
+         * Promise-compatible return type if the resolved value of the return type has a
+         * construct signature that takes in an `initializer` function that in turn supplies
+         * a `resolve` function as one of its arguments and results in an object with a
+         * callable `then` signature.
+         *
+         * @param node The signature to check
+         */
+        function checkAsyncFunctionReturnType(node) {
+            // As part of our emit for an async function, we will need to emit the entity name of
+            // the return type annotation as an expression. To meet the necessary runtime semantics
+            // for __awaiter, we must also check that the type of the declaration (e.g. the static
+            // side or "constructor" of the promise type) is compatible `PromiseConstructorLike`.
+            //
+            // An example might be (from lib.es6.d.ts):
+            //
+            //  interface Promise<T> { ... }
+            //  interface PromiseConstructor {
+            //      new <T>(...): Promise<T>;
+            //  }
+            //  declare var Promise: PromiseConstructor;
+            //
+            // When an async function declares a return type annotation of `Promise<T>`, we
+            // need to get the type of the `Promise` variable declaration above, which would
+            // be `PromiseConstructor`.
+            //
+            // The same case applies to a class:
+            //
+            //  declare class Promise<T> {
+            //      constructor(...);
+            //      then<U>(...): Promise<U>;
+            //  }
+            //
+            var returnTypeNode = ts.getEffectiveReturnTypeNode(node); // TODO: GH#18217
+            var returnType = getTypeFromTypeNode(returnTypeNode);
+            if (languageVersion >= 2 /* ES2015 */) {
+                if (returnType === errorType) {
+                    return errorType;
+                }
+                var globalPromiseType = getGlobalPromiseType(/*reportErrors*/ true);
+                if (globalPromiseType !== emptyGenericType && !isReferenceToType(returnType, globalPromiseType)) {
+                    // The promise type was not a valid type reference to the global promise type, so we
+                    // report an error and return the unknown type.
+                    error(returnTypeNode, ts.Diagnostics.The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type);
+                    return errorType;
+                }
+            }
+            else {
+                // Always mark the type node as referenced if it points to a value
+                markTypeNodeAsReferenced(returnTypeNode);
+                if (returnType === errorType) {
+                    return errorType;
+                }
+                var promiseConstructorName = ts.getEntityNameFromTypeNode(returnTypeNode);
+                if (promiseConstructorName === undefined) {
+                    error(returnTypeNode, ts.Diagnostics.Type_0_is_not_a_valid_async_function_return_type_in_ES5_SlashES3_because_it_does_not_refer_to_a_Promise_compatible_constructor_value, typeToString(returnType));
+                    return errorType;
+                }
+                var promiseConstructorSymbol = resolveEntityName(promiseConstructorName, 67216319 /* Value */, /*ignoreErrors*/ true);
+                var promiseConstructorType = promiseConstructorSymbol ? getTypeOfSymbol(promiseConstructorSymbol) : errorType;
+                if (promiseConstructorType === errorType) {
+                    if (promiseConstructorName.kind === 71 /* Identifier */ && promiseConstructorName.escapedText === "Promise" && getTargetType(returnType) === getGlobalPromiseType(/*reportErrors*/ false)) {
+                        error(returnTypeNode, ts.Diagnostics.An_async_function_or_method_in_ES5_SlashES3_requires_the_Promise_constructor_Make_sure_you_have_a_declaration_for_the_Promise_constructor_or_include_ES2015_in_your_lib_option);
+                    }
+                    else {
+                        error(returnTypeNode, ts.Diagnostics.Type_0_is_not_a_valid_async_function_return_type_in_ES5_SlashES3_because_it_does_not_refer_to_a_Promise_compatible_constructor_value, ts.entityNameToString(promiseConstructorName));
+                    }
+                    return errorType;
+                }
+                var globalPromiseConstructorLikeType = getGlobalPromiseConstructorLikeType(/*reportErrors*/ true);
+                if (globalPromiseConstructorLikeType === emptyObjectType) {
+                    // If we couldn't resolve the global PromiseConstructorLike type we cannot verify
+                    // compatibility with __awaiter.
+                    error(returnTypeNode, ts.Diagnostics.Type_0_is_not_a_valid_async_function_return_type_in_ES5_SlashES3_because_it_does_not_refer_to_a_Promise_compatible_constructor_value, ts.entityNameToString(promiseConstructorName));
+                    return errorType;
+                }
+                if (!checkTypeAssignableTo(promiseConstructorType, globalPromiseConstructorLikeType, returnTypeNode, ts.Diagnostics.Type_0_is_not_a_valid_async_function_return_type_in_ES5_SlashES3_because_it_does_not_refer_to_a_Promise_compatible_constructor_value)) {
+                    return errorType;
+                }
+                // Verify there is no local declaration that could collide with the promise constructor.
+                var rootName = promiseConstructorName && getFirstIdentifier(promiseConstructorName);
+                var collidingSymbol = getSymbol(node.locals, rootName.escapedText, 67216319 /* Value */);
+                if (collidingSymbol) {
+                    error(collidingSymbol.valueDeclaration, ts.Diagnostics.Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions, ts.idText(rootName), ts.entityNameToString(promiseConstructorName));
+                    return errorType;
+                }
+            }
+            // Get and return the awaited type of the return type.
+            return checkAwaitedType(returnType, node, ts.Diagnostics.The_return_type_of_an_async_function_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member);
+        }
+        /** Check a decorator */
+        function checkDecorator(node) {
+            var signature = getResolvedSignature(node);
+            var returnType = getReturnTypeOfSignature(signature);
+            if (returnType.flags & 1 /* Any */) {
+                return;
+            }
+            var expectedReturnType;
+            var headMessage = getDiagnosticHeadMessageForDecoratorResolution(node);
+            var errorInfo;
+            switch (node.parent.kind) {
+                case 235 /* ClassDeclaration */:
+                    var classSymbol = getSymbolOfNode(node.parent);
+                    var classConstructorType = getTypeOfSymbol(classSymbol);
+                    expectedReturnType = getUnionType([classConstructorType, voidType]);
+                    break;
+                case 149 /* Parameter */:
+                    expectedReturnType = voidType;
+                    errorInfo = ts.chainDiagnosticMessages(
+                    /*details*/ undefined, ts.Diagnostics.The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any);
+                    break;
+                case 152 /* PropertyDeclaration */:
+                    expectedReturnType = voidType;
+                    errorInfo = ts.chainDiagnosticMessages(
+                    /*details*/ undefined, ts.Diagnostics.The_return_type_of_a_property_decorator_function_must_be_either_void_or_any);
+                    break;
+                case 154 /* MethodDeclaration */:
+                case 156 /* GetAccessor */:
+                case 157 /* SetAccessor */:
+                    var methodType = getTypeOfNode(node.parent); // TODO: GH#18217
+                    var descriptorType = createTypedPropertyDescriptorType(methodType);
+                    expectedReturnType = getUnionType([descriptorType, voidType]);
+                    break;
+                default:
+                    return ts.Debug.fail();
+            }
+            checkTypeAssignableTo(returnType, expectedReturnType, node, headMessage, function () { return errorInfo; });
+        }
+        /**
+         * If a TypeNode can be resolved to a value symbol imported from an external module, it is
+         * marked as referenced to prevent import elision.
+         */
+        function markTypeNodeAsReferenced(node) {
+            markEntityNameOrEntityExpressionAsReference(node && ts.getEntityNameFromTypeNode(node));
+        }
+        function markEntityNameOrEntityExpressionAsReference(typeName) {
+            if (!typeName)
+                return;
+            var rootName = getFirstIdentifier(typeName);
+            var meaning = (typeName.kind === 71 /* Identifier */ ? 67901928 /* Type */ : 1920 /* Namespace */) | 2097152 /* Alias */;
+            var rootSymbol = resolveName(rootName, rootName.escapedText, meaning, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined, /*isRefernce*/ true);
+            if (rootSymbol
+                && rootSymbol.flags & 2097152 /* Alias */
+                && symbolIsValue(rootSymbol)
+                && !isConstEnumOrConstEnumOnlyModule(resolveAlias(rootSymbol))) {
+                markAliasSymbolAsReferenced(rootSymbol);
+            }
+        }
+        /**
+         * This function marks the type used for metadata decorator as referenced if it is import
+         * from external module.
+         * This is different from markTypeNodeAsReferenced because it tries to simplify type nodes in
+         * union and intersection type
+         * @param node
+         */
+        function markDecoratorMedataDataTypeNodeAsReferenced(node) {
+            var entityName = getEntityNameForDecoratorMetadata(node);
+            if (entityName && ts.isEntityName(entityName)) {
+                markEntityNameOrEntityExpressionAsReference(entityName);
+            }
+        }
+        function getEntityNameForDecoratorMetadata(node) {
+            if (node) {
+                switch (node.kind) {
+                    case 170 /* IntersectionType */:
+                    case 169 /* UnionType */:
+                        var commonEntityName = void 0;
+                        for (var _i = 0, _a = node.types; _i < _a.length; _i++) {
+                            var typeNode = _a[_i];
+                            while (typeNode.kind === 173 /* ParenthesizedType */) {
+                                typeNode = typeNode.type; // Skip parens if need be
+                            }
+                            if (typeNode.kind === 131 /* NeverKeyword */) {
+                                continue; // Always elide `never` from the union/intersection if possible
+                            }
+                            if (!strictNullChecks && (typeNode.kind === 95 /* NullKeyword */ || typeNode.kind === 140 /* UndefinedKeyword */)) {
+                                continue; // Elide null and undefined from unions for metadata, just like what we did prior to the implementation of strict null checks
+                            }
+                            var individualEntityName = getEntityNameForDecoratorMetadata(typeNode);
+                            if (!individualEntityName) {
+                                // Individual is something like string number
+                                // So it would be serialized to either that type or object
+                                // Safe to return here
+                                return undefined;
+                            }
+                            if (commonEntityName) {
+                                // Note this is in sync with the transformation that happens for type node.
+                                // Keep this in sync with serializeUnionOrIntersectionType
+                                // Verify if they refer to same entity and is identifier
+                                // return undefined if they dont match because we would emit object
+                                if (!ts.isIdentifier(commonEntityName) ||
+                                    !ts.isIdentifier(individualEntityName) ||
+                                    commonEntityName.escapedText !== individualEntityName.escapedText) {
+                                    return undefined;
+                                }
+                            }
+                            else {
+                                commonEntityName = individualEntityName;
+                            }
+                        }
+                        return commonEntityName;
+                    case 173 /* ParenthesizedType */:
+                        return getEntityNameForDecoratorMetadata(node.type);
+                    case 162 /* TypeReference */:
+                        return node.typeName;
+                }
+            }
+        }
+        function getParameterTypeNodeForDecoratorCheck(node) {
+            var typeNode = ts.getEffectiveTypeAnnotationNode(node);
+            return ts.isRestParameter(node) ? ts.getRestParameterElementType(typeNode) : typeNode;
+        }
+        /** Check the decorators of a node */
+        function checkDecorators(node) {
+            if (!node.decorators) {
+                return;
+            }
+            // skip this check for nodes that cannot have decorators. These should have already had an error reported by
+            // checkGrammarDecorators.
+            if (!ts.nodeCanBeDecorated(node, node.parent, node.parent.parent)) {
+                return;
+            }
+            if (!compilerOptions.experimentalDecorators) {
+                error(node, ts.Diagnostics.Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning);
+            }
+            var firstDecorator = node.decorators[0];
+            checkExternalEmitHelpers(firstDecorator, 8 /* Decorate */);
+            if (node.kind === 149 /* Parameter */) {
+                checkExternalEmitHelpers(firstDecorator, 32 /* Param */);
+            }
+            if (compilerOptions.emitDecoratorMetadata) {
+                checkExternalEmitHelpers(firstDecorator, 16 /* Metadata */);
+                // we only need to perform these checks if we are emitting serialized type metadata for the target of a decorator.
+                switch (node.kind) {
+                    case 235 /* ClassDeclaration */:
+                        var constructor = ts.getFirstConstructorWithBody(node);
+                        if (constructor) {
+                            for (var _i = 0, _a = constructor.parameters; _i < _a.length; _i++) {
+                                var parameter = _a[_i];
+                                markDecoratorMedataDataTypeNodeAsReferenced(getParameterTypeNodeForDecoratorCheck(parameter));
+                            }
+                        }
+                        break;
+                    case 154 /* MethodDeclaration */:
+                    case 156 /* GetAccessor */:
+                    case 157 /* SetAccessor */:
+                        for (var _b = 0, _c = node.parameters; _b < _c.length; _b++) {
+                            var parameter = _c[_b];
+                            markDecoratorMedataDataTypeNodeAsReferenced(getParameterTypeNodeForDecoratorCheck(parameter));
+                        }
+                        markDecoratorMedataDataTypeNodeAsReferenced(ts.getEffectiveReturnTypeNode(node));
+                        break;
+                    case 152 /* PropertyDeclaration */:
+                        markDecoratorMedataDataTypeNodeAsReferenced(ts.getEffectiveTypeAnnotationNode(node));
+                        break;
+                    case 149 /* Parameter */:
+                        markDecoratorMedataDataTypeNodeAsReferenced(getParameterTypeNodeForDecoratorCheck(node));
+                        var containingSignature = node.parent;
+                        for (var _d = 0, _e = containingSignature.parameters; _d < _e.length; _d++) {
+                            var parameter = _e[_d];
+                            markDecoratorMedataDataTypeNodeAsReferenced(getParameterTypeNodeForDecoratorCheck(parameter));
+                        }
+                        break;
+                }
+            }
+            ts.forEach(node.decorators, checkDecorator);
+        }
+        function checkFunctionDeclaration(node) {
+            if (produceDiagnostics) {
+                checkFunctionOrMethodDeclaration(node);
+                checkGrammarForGenerator(node);
+                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+            }
+        }
+        function checkJSDocTypeAliasTag(node) {
+            if (!node.typeExpression) {
+                // If the node had `@property` tags, `typeExpression` would have been set to the first property tag.
+                error(node.name, ts.Diagnostics.JSDoc_typedef_tag_should_either_have_a_type_annotation_or_be_followed_by_property_or_member_tags);
+            }
+            if (node.name) {
+                checkTypeNameIsReserved(node.name, ts.Diagnostics.Type_alias_name_cannot_be_0);
+            }
+            checkSourceElement(node.typeExpression);
+        }
+        function checkJSDocParameterTag(node) {
+            checkSourceElement(node.typeExpression);
+            if (!ts.getParameterSymbolFromJSDoc(node)) {
+                var decl = ts.getHostSignatureFromJSDoc(node);
+                // don't issue an error for invalid hosts -- just functions --
+                // and give a better error message when the host function mentions `arguments`
+                // but the tag doesn't have an array type
+                if (decl) {
+                    var i = ts.getJSDocTags(decl).filter(ts.isJSDocParameterTag).indexOf(node);
+                    if (i > -1 && i < decl.parameters.length && ts.isBindingPattern(decl.parameters[i].name)) {
+                        return;
+                    }
+                    if (!containsArgumentsReference(decl)) {
+                        error(node.name, ts.Diagnostics.JSDoc_param_tag_has_name_0_but_there_is_no_parameter_with_that_name, ts.idText(node.name.kind === 146 /* QualifiedName */ ? node.name.right : node.name));
+                    }
+                    else if (ts.findLast(ts.getJSDocTags(decl), ts.isJSDocParameterTag) === node &&
+                        node.typeExpression && node.typeExpression.type &&
+                        !isArrayType(getTypeFromTypeNode(node.typeExpression.type))) {
+                        error(node.name, ts.Diagnostics.JSDoc_param_tag_has_name_0_but_there_is_no_parameter_with_that_name_It_would_match_arguments_if_it_had_an_array_type, ts.idText(node.name.kind === 146 /* QualifiedName */ ? node.name.right : node.name));
+                    }
+                }
+            }
+        }
+        function checkJSDocAugmentsTag(node) {
+            var classLike = ts.getJSDocHost(node);
+            if (!ts.isClassDeclaration(classLike) && !ts.isClassExpression(classLike)) {
+                error(classLike, ts.Diagnostics.JSDoc_0_is_not_attached_to_a_class, ts.idText(node.tagName));
+                return;
+            }
+            var augmentsTags = ts.getJSDocTags(classLike).filter(ts.isJSDocAugmentsTag);
+            ts.Debug.assert(augmentsTags.length > 0);
+            if (augmentsTags.length > 1) {
+                error(augmentsTags[1], ts.Diagnostics.Class_declarations_cannot_have_more_than_one_augments_or_extends_tag);
+            }
+            var name = getIdentifierFromEntityNameExpression(node.class.expression);
+            var extend = ts.getClassExtendsHeritageClauseElement(classLike);
+            if (extend) {
+                var className = getIdentifierFromEntityNameExpression(extend.expression);
+                if (className && name.escapedText !== className.escapedText) {
+                    error(name, ts.Diagnostics.JSDoc_0_1_does_not_match_the_extends_2_clause, ts.idText(node.tagName), ts.idText(name), ts.idText(className));
+                }
+            }
+        }
+        function getIdentifierFromEntityNameExpression(node) {
+            switch (node.kind) {
+                case 71 /* Identifier */:
+                    return node;
+                case 185 /* PropertyAccessExpression */:
+                    return node.name;
+                default:
+                    return undefined;
+            }
+        }
+        function checkFunctionOrMethodDeclaration(node) {
+            checkDecorators(node);
+            checkSignatureDeclaration(node);
+            var functionFlags = ts.getFunctionFlags(node);
+            // Do not use hasDynamicName here, because that returns false for well known symbols.
+            // We want to perform checkComputedPropertyName for all computed properties, including
+            // well known symbols.
+            if (node.name && node.name.kind === 147 /* ComputedPropertyName */) {
+                // This check will account for methods in class/interface declarations,
+                // as well as accessors in classes/object literals
+                checkComputedPropertyName(node.name);
+            }
+            if (!hasNonBindableDynamicName(node)) {
+                // first we want to check the local symbol that contain this declaration
+                // - if node.localSymbol !== undefined - this is current declaration is exported and localSymbol points to the local symbol
+                // - if node.localSymbol === undefined - this node is non-exported so we can just pick the result of getSymbolOfNode
+                var symbol = getSymbolOfNode(node);
+                var localSymbol = node.localSymbol || symbol;
+                // Since the javascript won't do semantic analysis like typescript,
+                // if the javascript file comes before the typescript file and both contain same name functions,
+                // checkFunctionOrConstructorSymbol wouldn't be called if we didnt ignore javascript function.
+                var firstDeclaration = ts.find(localSymbol.declarations, 
+                // Get first non javascript function declaration
+                function (declaration) { return declaration.kind === node.kind && !(declaration.flags & 65536 /* JavaScriptFile */); });
+                // Only type check the symbol once
+                if (node === firstDeclaration) {
+                    checkFunctionOrConstructorSymbol(localSymbol);
+                }
+                if (symbol.parent) {
+                    // run check once for the first declaration
+                    if (ts.getDeclarationOfKind(symbol, node.kind) === node) {
+                        // run check on export symbol to check that modifiers agree across all exported declarations
+                        checkFunctionOrConstructorSymbol(symbol);
+                    }
+                }
+            }
+            var body = node.kind === 153 /* MethodSignature */ ? undefined : node.body;
+            checkSourceElement(body);
+            var returnTypeNode = ts.getEffectiveReturnTypeNode(node);
+            if ((functionFlags & 1 /* Generator */) === 0) { // Async function or normal function
+                var returnOrPromisedType = returnTypeNode && (functionFlags & 2 /* Async */
+                    ? checkAsyncFunctionReturnType(node) // Async function
+                    : getTypeFromTypeNode(returnTypeNode)); // normal function
+                checkAllCodePathsInNonVoidFunctionReturnOrThrow(node, returnOrPromisedType);
+            }
+            if (produceDiagnostics && !returnTypeNode) {
+                // Report an implicit any error if there is no body, no explicit return type, and node is not a private method
+                // in an ambient context
+                if (noImplicitAny && ts.nodeIsMissing(body) && !isPrivateWithinAmbient(node)) {
+                    reportImplicitAnyError(node, anyType);
+                }
+                if (functionFlags & 1 /* Generator */ && ts.nodeIsPresent(body)) {
+                    // A generator with a body and no type annotation can still cause errors. It can error if the
+                    // yielded values have no common supertype, or it can give an implicit any error if it has no
+                    // yielded values. The only way to trigger these errors is to try checking its return type.
+                    getReturnTypeOfSignature(getSignatureFromDeclaration(node));
+                }
+            }
+        }
+        function registerForUnusedIdentifiersCheck(node) {
+            // May be in a call such as getTypeOfNode that happened to call this. But potentiallyUnusedIdentifiers is only defined in the scope of `checkSourceFile`.
+            if (produceDiagnostics) {
+                var sourceFile = ts.getSourceFileOfNode(node);
+                var potentiallyUnusedIdentifiers = allPotentiallyUnusedIdentifiers.get(sourceFile.path);
+                if (!potentiallyUnusedIdentifiers) {
+                    potentiallyUnusedIdentifiers = [];
+                    allPotentiallyUnusedIdentifiers.set(sourceFile.path, potentiallyUnusedIdentifiers);
+                }
+                // TODO: GH#22580
+                // Debug.assert(addToSeen(seenPotentiallyUnusedIdentifiers, getNodeId(node)), "Adding potentially-unused identifier twice");
+                potentiallyUnusedIdentifiers.push(node);
+            }
+        }
+        function checkUnusedIdentifiers(potentiallyUnusedIdentifiers, addDiagnostic) {
+            for (var _i = 0, potentiallyUnusedIdentifiers_1 = potentiallyUnusedIdentifiers; _i < potentiallyUnusedIdentifiers_1.length; _i++) {
+                var node = potentiallyUnusedIdentifiers_1[_i];
+                switch (node.kind) {
+                    case 235 /* ClassDeclaration */:
+                    case 205 /* ClassExpression */:
+                        checkUnusedClassMembers(node, addDiagnostic);
+                        checkUnusedTypeParameters(node, addDiagnostic);
+                        break;
+                    case 236 /* InterfaceDeclaration */:
+                        checkUnusedTypeParameters(node, addDiagnostic);
+                        break;
+                    case 274 /* SourceFile */:
+                    case 239 /* ModuleDeclaration */:
+                    case 213 /* Block */:
+                    case 241 /* CaseBlock */:
+                    case 220 /* ForStatement */:
+                    case 221 /* ForInStatement */:
+                    case 222 /* ForOfStatement */:
+                        checkUnusedLocalsAndParameters(node, addDiagnostic);
+                        break;
+                    case 155 /* Constructor */:
+                    case 192 /* FunctionExpression */:
+                    case 234 /* FunctionDeclaration */:
+                    case 193 /* ArrowFunction */:
+                    case 154 /* MethodDeclaration */:
+                    case 156 /* GetAccessor */:
+                    case 157 /* SetAccessor */:
+                        if (node.body) {
+                            checkUnusedLocalsAndParameters(node, addDiagnostic);
+                        }
+                        checkUnusedTypeParameters(node, addDiagnostic);
+                        break;
+                    case 153 /* MethodSignature */:
+                    case 158 /* CallSignature */:
+                    case 159 /* ConstructSignature */:
+                    case 163 /* FunctionType */:
+                    case 164 /* ConstructorType */:
+                    case 237 /* TypeAliasDeclaration */:
+                        checkUnusedTypeParameters(node, addDiagnostic);
+                        break;
+                    default:
+                        ts.Debug.assertNever(node, "Node should not have been registered for unused identifiers check");
+                }
+            }
+        }
+        function errorUnusedLocal(declaration, name, addDiagnostic) {
+            var node = ts.getNameOfDeclaration(declaration) || declaration;
+            var message = isTypeDeclaration(declaration) ? ts.Diagnostics._0_is_declared_but_never_used : ts.Diagnostics._0_is_declared_but_its_value_is_never_read;
+            addDiagnostic(0 /* Local */, ts.createDiagnosticForNode(node, message, name));
+        }
+        function parameterNameStartsWithUnderscore(parameterName) {
+            return parameterName && isIdentifierThatStartsWithUnderScore(parameterName);
+        }
+        function isIdentifierThatStartsWithUnderScore(node) {
+            return ts.isIdentifier(node) && ts.idText(node).charCodeAt(0) === 95 /* _ */;
+        }
+        function checkUnusedClassMembers(node, addDiagnostic) {
+            if (!(node.flags & 4194304 /* Ambient */)) {
+                for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
+                    var member = _a[_i];
+                    switch (member.kind) {
+                        case 154 /* MethodDeclaration */:
+                        case 152 /* PropertyDeclaration */:
+                        case 156 /* GetAccessor */:
+                        case 157 /* SetAccessor */:
+                            if (member.kind === 157 /* SetAccessor */ && member.symbol.flags & 32768 /* GetAccessor */) {
+                                // Already would have reported an error on the getter.
+                                break;
+                            }
+                            var symbol = getSymbolOfNode(member);
+                            if (!symbol.isReferenced && ts.hasModifier(member, 8 /* Private */)) {
+                                addDiagnostic(0 /* Local */, ts.createDiagnosticForNode(member.name, ts.Diagnostics._0_is_declared_but_its_value_is_never_read, symbolToString(symbol)));
+                            }
+                            break;
+                        case 155 /* Constructor */:
+                            for (var _b = 0, _c = member.parameters; _b < _c.length; _b++) {
+                                var parameter = _c[_b];
+                                if (!parameter.symbol.isReferenced && ts.hasModifier(parameter, 8 /* Private */)) {
+                                    addDiagnostic(0 /* Local */, ts.createDiagnosticForNode(parameter.name, ts.Diagnostics.Property_0_is_declared_but_its_value_is_never_read, ts.symbolName(parameter.symbol)));
+                                }
+                            }
+                            break;
+                        case 160 /* IndexSignature */:
+                        case 212 /* SemicolonClassElement */:
+                            // Can't be private
+                            break;
+                        default:
+                            ts.Debug.fail();
+                    }
+                }
+            }
+        }
+        function checkUnusedTypeParameters(node, addDiagnostic) {
+            // Only report errors on the last declaration for the type parameter container;
+            // this ensures that all uses have been accounted for.
+            var typeParameters = ts.getEffectiveTypeParameterDeclarations(node);
+            if (!(node.flags & 4194304 /* Ambient */) && ts.last(getSymbolOfNode(node).declarations) === node) {
+                for (var _i = 0, typeParameters_2 = typeParameters; _i < typeParameters_2.length; _i++) {
+                    var typeParameter = typeParameters_2[_i];
+                    if (!(getMergedSymbol(typeParameter.symbol).isReferenced & 262144 /* TypeParameter */) && !isIdentifierThatStartsWithUnderScore(typeParameter.name)) {
+                        addDiagnostic(1 /* Parameter */, ts.createDiagnosticForNode(typeParameter.name, ts.Diagnostics._0_is_declared_but_its_value_is_never_read, ts.symbolName(typeParameter.symbol)));
+                    }
+                }
+            }
+        }
+        function addToGroup(map, key, value, getKey) {
+            var keyString = String(getKey(key));
+            var group = map.get(keyString);
+            if (group) {
+                group[1].push(value);
+            }
+            else {
+                map.set(keyString, [key, [value]]);
+            }
+        }
+        function tryGetRootParameterDeclaration(node) {
+            return ts.tryCast(ts.getRootDeclaration(node), ts.isParameter);
+        }
+        function checkUnusedLocalsAndParameters(nodeWithLocals, addDiagnostic) {
+            if (nodeWithLocals.flags & 4194304 /* Ambient */)
+                return;
+            // Ideally we could use the ImportClause directly as a key, but must wait until we have full ES6 maps. So must store key along with value.
+            var unusedImports = ts.createMap();
+            var unusedDestructures = ts.createMap();
+            var unusedVariables = ts.createMap();
+            nodeWithLocals.locals.forEach(function (local) {
+                // If it's purely a type parameter, ignore, will be checked in `checkUnusedTypeParameters`.
+                // If it's a type parameter merged with a parameter, check if the parameter-side is used.
+                if (local.flags & 262144 /* TypeParameter */ ? !(local.flags & 3 /* Variable */ && !(local.isReferenced & 3 /* Variable */)) : local.isReferenced || local.exportSymbol) {
+                    return;
+                }
+                for (var _i = 0, _a = local.declarations; _i < _a.length; _i++) {
+                    var declaration = _a[_i];
+                    if (ts.isAmbientModule(declaration))
+                        continue;
+                    if (isImportedDeclaration(declaration)) {
+                        addToGroup(unusedImports, importClauseFromImported(declaration), declaration, getNodeId);
+                    }
+                    else if (ts.isBindingElement(declaration) && ts.isObjectBindingPattern(declaration.parent)) {
+                        // In `{ a, ...b }, `a` is considered used since it removes a property from `b`. `b` may still be unused though.
+                        var lastElement = ts.last(declaration.parent.elements);
+                        if (declaration === lastElement || !ts.last(declaration.parent.elements).dotDotDotToken) {
+                            addToGroup(unusedDestructures, declaration.parent, declaration, getNodeId);
+                        }
+                    }
+                    else if (ts.isVariableDeclaration(declaration)) {
+                        if (!isIdentifierThatStartsWithUnderScore(declaration.name) || !ts.isForInOrOfStatement(declaration.parent.parent)) {
+                            addToGroup(unusedVariables, declaration.parent, declaration, getNodeId);
+                        }
+                    }
+                    else {
+                        var parameter = local.valueDeclaration && tryGetRootParameterDeclaration(local.valueDeclaration);
+                        if (parameter) {
+                            var name = ts.getNameOfDeclaration(local.valueDeclaration);
+                            if (!ts.isParameterPropertyDeclaration(parameter) && !ts.parameterIsThisKeyword(parameter) && !parameterNameStartsWithUnderscore(name)) {
+                                addDiagnostic(1 /* Parameter */, ts.createDiagnosticForNode(name, ts.Diagnostics._0_is_declared_but_its_value_is_never_read, ts.symbolName(local)));
+                            }
+                        }
+                        else {
+                            errorUnusedLocal(declaration, ts.symbolName(local), addDiagnostic);
+                        }
+                    }
+                }
+            });
+            unusedImports.forEach(function (_a) {
+                var importClause = _a[0], unuseds = _a[1];
+                var importDecl = importClause.parent;
+                var nDeclarations = (importClause.name ? 1 : 0) +
+                    (importClause.namedBindings ?
+                        (importClause.namedBindings.kind === 246 /* NamespaceImport */ ? 1 : importClause.namedBindings.elements.length)
+                        : 0);
+                if (nDeclarations === unuseds.length) {
+                    addDiagnostic(0 /* Local */, unuseds.length === 1
+                        ? ts.createDiagnosticForNode(importDecl, ts.Diagnostics._0_is_declared_but_its_value_is_never_read, ts.idText(ts.first(unuseds).name))
+                        : ts.createDiagnosticForNode(importDecl, ts.Diagnostics.All_imports_in_import_declaration_are_unused));
+                }
+                else {
+                    for (var _i = 0, unuseds_1 = unuseds; _i < unuseds_1.length; _i++) {
+                        var unused = unuseds_1[_i];
+                        errorUnusedLocal(unused, ts.idText(unused.name), addDiagnostic);
+                    }
+                }
+            });
+            unusedDestructures.forEach(function (_a) {
+                var bindingPattern = _a[0], bindingElements = _a[1];
+                var kind = tryGetRootParameterDeclaration(bindingPattern.parent) ? 1 /* Parameter */ : 0 /* Local */;
+                if (bindingPattern.elements.length === bindingElements.length) {
+                    if (bindingElements.length === 1 && bindingPattern.parent.kind === 232 /* VariableDeclaration */ && bindingPattern.parent.parent.kind === 233 /* VariableDeclarationList */) {
+                        addToGroup(unusedVariables, bindingPattern.parent.parent, bindingPattern.parent, getNodeId);
+                    }
+                    else {
+                        addDiagnostic(kind, bindingElements.length === 1
+                            ? ts.createDiagnosticForNode(bindingPattern, ts.Diagnostics._0_is_declared_but_its_value_is_never_read, ts.idText(ts.cast(ts.first(bindingElements).name, ts.isIdentifier)))
+                            : ts.createDiagnosticForNode(bindingPattern, ts.Diagnostics.All_destructured_elements_are_unused));
+                    }
+                }
+                else {
+                    for (var _i = 0, bindingElements_1 = bindingElements; _i < bindingElements_1.length; _i++) {
+                        var e = bindingElements_1[_i];
+                        addDiagnostic(kind, ts.createDiagnosticForNode(e, ts.Diagnostics._0_is_declared_but_its_value_is_never_read, ts.idText(ts.cast(e.name, ts.isIdentifier))));
+                    }
+                }
+            });
+            unusedVariables.forEach(function (_a) {
+                var declarationList = _a[0], declarations = _a[1];
+                if (declarationList.declarations.length === declarations.length) {
+                    addDiagnostic(0 /* Local */, declarations.length === 1
+                        ? ts.createDiagnosticForNode(ts.first(declarations).name, ts.Diagnostics._0_is_declared_but_its_value_is_never_read, bindingNameText(ts.first(declarations).name))
+                        : ts.createDiagnosticForNode(declarationList.parent.kind === 214 /* VariableStatement */ ? declarationList.parent : declarationList, ts.Diagnostics.All_variables_are_unused));
+                }
+                else {
+                    for (var _i = 0, declarations_5 = declarations; _i < declarations_5.length; _i++) {
+                        var decl = declarations_5[_i];
+                        addDiagnostic(0 /* Local */, ts.createDiagnosticForNode(decl, ts.Diagnostics._0_is_declared_but_its_value_is_never_read, ts.idText(ts.cast(decl.name, ts.isIdentifier))));
+                    }
+                }
+            });
+        }
+        function bindingNameText(name) {
+            switch (name.kind) {
+                case 71 /* Identifier */:
+                    return ts.idText(name);
+                case 181 /* ArrayBindingPattern */:
+                case 180 /* ObjectBindingPattern */:
+                    return bindingNameText(ts.cast(ts.first(name.elements), ts.isBindingElement).name);
+                default:
+                    return ts.Debug.assertNever(name);
+            }
+        }
+        function isImportedDeclaration(node) {
+            return node.kind === 245 /* ImportClause */ || node.kind === 248 /* ImportSpecifier */ || node.kind === 246 /* NamespaceImport */;
+        }
+        function importClauseFromImported(decl) {
+            return decl.kind === 245 /* ImportClause */ ? decl : decl.kind === 246 /* NamespaceImport */ ? decl.parent : decl.parent.parent;
+        }
+        function checkBlock(node) {
+            // Grammar checking for SyntaxKind.Block
+            if (node.kind === 213 /* Block */) {
+                checkGrammarStatementInAmbientContext(node);
+            }
+            if (ts.isFunctionOrModuleBlock(node)) {
+                var saveFlowAnalysisDisabled = flowAnalysisDisabled;
+                ts.forEach(node.statements, checkSourceElement);
+                flowAnalysisDisabled = saveFlowAnalysisDisabled;
+            }
+            else {
+                ts.forEach(node.statements, checkSourceElement);
+            }
+            if (node.locals) {
+                registerForUnusedIdentifiersCheck(node);
+            }
+        }
+        function checkCollisionWithArgumentsInGeneratedCode(node) {
+            // no rest parameters \ declaration context \ overload - no codegen impact
+            if (languageVersion >= 2 /* ES2015 */ || compilerOptions.noEmit || !ts.hasRestParameter(node) || node.flags & 4194304 /* Ambient */ || ts.nodeIsMissing(node.body)) {
+                return;
+            }
+            ts.forEach(node.parameters, function (p) {
+                if (p.name && !ts.isBindingPattern(p.name) && p.name.escapedText === argumentsSymbol.escapedName) {
+                    error(p, ts.Diagnostics.Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters);
+                }
+            });
+        }
+        function needCollisionCheckForIdentifier(node, identifier, name) {
+            if (!(identifier && identifier.escapedText === name)) {
+                return false;
+            }
+            if (node.kind === 152 /* PropertyDeclaration */ ||
+                node.kind === 151 /* PropertySignature */ ||
+                node.kind === 154 /* MethodDeclaration */ ||
+                node.kind === 153 /* MethodSignature */ ||
+                node.kind === 156 /* GetAccessor */ ||
+                node.kind === 157 /* SetAccessor */) {
+                // it is ok to have member named '_super' or '_this' - member access is always qualified
+                return false;
+            }
+            if (node.flags & 4194304 /* Ambient */) {
+                // ambient context - no codegen impact
+                return false;
+            }
+            var root = ts.getRootDeclaration(node);
+            if (root.kind === 149 /* Parameter */ && ts.nodeIsMissing(root.parent.body)) {
+                // just an overload - no codegen impact
+                return false;
+            }
+            return true;
+        }
+        // this function will run after checking the source file so 'CaptureThis' is correct for all nodes
+        function checkIfThisIsCapturedInEnclosingScope(node) {
+            ts.findAncestor(node, function (current) {
+                if (getNodeCheckFlags(current) & 4 /* CaptureThis */) {
+                    var isDeclaration_1 = node.kind !== 71 /* Identifier */;
+                    if (isDeclaration_1) {
+                        error(ts.getNameOfDeclaration(node), ts.Diagnostics.Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference);
+                    }
+                    else {
+                        error(node, ts.Diagnostics.Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference);
+                    }
+                    return true;
+                }
+                return false;
+            });
+        }
+        function checkIfNewTargetIsCapturedInEnclosingScope(node) {
+            ts.findAncestor(node, function (current) {
+                if (getNodeCheckFlags(current) & 8 /* CaptureNewTarget */) {
+                    var isDeclaration_2 = node.kind !== 71 /* Identifier */;
+                    if (isDeclaration_2) {
+                        error(ts.getNameOfDeclaration(node), ts.Diagnostics.Duplicate_identifier_newTarget_Compiler_uses_variable_declaration_newTarget_to_capture_new_target_meta_property_reference);
+                    }
+                    else {
+                        error(node, ts.Diagnostics.Expression_resolves_to_variable_declaration_newTarget_that_compiler_uses_to_capture_new_target_meta_property_reference);
+                    }
+                    return true;
+                }
+                return false;
+            });
+        }
+        function checkCollisionWithRequireExportsInGeneratedCode(node, name) {
+            // No need to check for require or exports for ES6 modules and later
+            if (moduleKind >= ts.ModuleKind.ES2015 || compilerOptions.noEmit) {
+                return;
+            }
+            if (!needCollisionCheckForIdentifier(node, name, "require") && !needCollisionCheckForIdentifier(node, name, "exports")) {
+                return;
+            }
+            // Uninstantiated modules shouldnt do this check
+            if (ts.isModuleDeclaration(node) && ts.getModuleInstanceState(node) !== 1 /* Instantiated */) {
+                return;
+            }
+            // In case of variable declaration, node.parent is variable statement so look at the variable statement's parent
+            var parent = getDeclarationContainer(node);
+            if (parent.kind === 274 /* SourceFile */ && ts.isExternalOrCommonJsModule(parent)) {
+                // If the declaration happens to be in external module, report error that require and exports are reserved keywords
+                error(name, ts.Diagnostics.Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module, ts.declarationNameToString(name), ts.declarationNameToString(name));
+            }
+        }
+        function checkCollisionWithGlobalPromiseInGeneratedCode(node, name) {
+            if (languageVersion >= 4 /* ES2017 */ || compilerOptions.noEmit || !needCollisionCheckForIdentifier(node, name, "Promise")) {
+                return;
+            }
+            // Uninstantiated modules shouldnt do this check
+            if (ts.isModuleDeclaration(node) && ts.getModuleInstanceState(node) !== 1 /* Instantiated */) {
+                return;
+            }
+            // In case of variable declaration, node.parent is variable statement so look at the variable statement's parent
+            var parent = getDeclarationContainer(node);
+            if (parent.kind === 274 /* SourceFile */ && ts.isExternalOrCommonJsModule(parent) && parent.flags & 1024 /* HasAsyncFunctions */) {
+                // If the declaration happens to be in external module, report error that Promise is a reserved identifier.
+                error(name, ts.Diagnostics.Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_functions, ts.declarationNameToString(name), ts.declarationNameToString(name));
+            }
+        }
+        function checkVarDeclaredNamesNotShadowed(node) {
+            // - ScriptBody : StatementList
+            // It is a Syntax Error if any element of the LexicallyDeclaredNames of StatementList
+            // also occurs in the VarDeclaredNames of StatementList.
+            // - Block : { StatementList }
+            // It is a Syntax Error if any element of the LexicallyDeclaredNames of StatementList
+            // also occurs in the VarDeclaredNames of StatementList.
+            // Variable declarations are hoisted to the top of their function scope. They can shadow
+            // block scoped declarations, which bind tighter. this will not be flagged as duplicate definition
+            // by the binder as the declaration scope is different.
+            // A non-initialized declaration is a no-op as the block declaration will resolve before the var
+            // declaration. the problem is if the declaration has an initializer. this will act as a write to the
+            // block declared value. this is fine for let, but not const.
+            // Only consider declarations with initializers, uninitialized const declarations will not
+            // step on a let/const variable.
+            // Do not consider const and const declarations, as duplicate block-scoped declarations
+            // are handled by the binder.
+            // We are only looking for const declarations that step on let\const declarations from a
+            // different scope. e.g.:
+            //      {
+            //          const x = 0; // localDeclarationSymbol obtained after name resolution will correspond to this declaration
+            //          const x = 0; // symbol for this declaration will be 'symbol'
+            //      }
+            // skip block-scoped variables and parameters
+            if ((ts.getCombinedNodeFlags(node) & 3 /* BlockScoped */) !== 0 || ts.isParameterDeclaration(node)) {
+                return;
+            }
+            // skip variable declarations that don't have initializers
+            // NOTE: in ES6 spec initializer is required in variable declarations where name is binding pattern
+            // so we'll always treat binding elements as initialized
+            if (node.kind === 232 /* VariableDeclaration */ && !node.initializer) {
+                return;
+            }
+            var symbol = getSymbolOfNode(node);
+            if (symbol.flags & 1 /* FunctionScopedVariable */) {
+                if (!ts.isIdentifier(node.name))
+                    return ts.Debug.fail();
+                var localDeclarationSymbol = resolveName(node, node.name.escapedText, 3 /* Variable */, /*nodeNotFoundErrorMessage*/ undefined, /*nameArg*/ undefined, /*isUse*/ false);
+                if (localDeclarationSymbol &&
+                    localDeclarationSymbol !== symbol &&
+                    localDeclarationSymbol.flags & 2 /* BlockScopedVariable */) {
+                    if (getDeclarationNodeFlagsFromSymbol(localDeclarationSymbol) & 3 /* BlockScoped */) {
+                        var varDeclList = ts.getAncestor(localDeclarationSymbol.valueDeclaration, 233 /* VariableDeclarationList */);
+                        var container = varDeclList.parent.kind === 214 /* VariableStatement */ && varDeclList.parent.parent
+                            ? varDeclList.parent.parent
+                            : undefined;
+                        // names of block-scoped and function scoped variables can collide only
+                        // if block scoped variable is defined in the function\module\source file scope (because of variable hoisting)
+                        var namesShareScope = container &&
+                            (container.kind === 213 /* Block */ && ts.isFunctionLike(container.parent) ||
+                                container.kind === 240 /* ModuleBlock */ ||
+                                container.kind === 239 /* ModuleDeclaration */ ||
+                                container.kind === 274 /* SourceFile */);
+                        // here we know that function scoped variable is shadowed by block scoped one
+                        // if they are defined in the same scope - binder has already reported redeclaration error
+                        // otherwise if variable has an initializer - show error that initialization will fail
+                        // since LHS will be block scoped name instead of function scoped
+                        if (!namesShareScope) {
+                            var name = symbolToString(localDeclarationSymbol);
+                            error(node, ts.Diagnostics.Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1, name, name);
+                        }
+                    }
+                }
+            }
+        }
+        // Check that a parameter initializer contains no references to parameters declared to the right of itself
+        function checkParameterInitializer(node) {
+            if (ts.getRootDeclaration(node).kind !== 149 /* Parameter */) {
+                return;
+            }
+            var func = ts.getContainingFunction(node);
+            visit(node.initializer);
+            function visit(n) {
+                if (ts.isTypeNode(n) || ts.isDeclarationName(n)) {
+                    // do not dive in types
+                    // skip declaration names (i.e. in object literal expressions)
+                    return;
+                }
+                if (n.kind === 185 /* PropertyAccessExpression */) {
+                    // skip property names in property access expression
+                    return visit(n.expression);
+                }
+                else if (n.kind === 71 /* Identifier */) {
+                    // check FunctionLikeDeclaration.locals (stores parameters\function local variable)
+                    // if it contains entry with a specified name
+                    var symbol = resolveName(n, n.escapedText, 67216319 /* Value */ | 2097152 /* Alias */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined, /*isUse*/ false);
+                    if (!symbol || symbol === unknownSymbol || !symbol.valueDeclaration) {
+                        return;
+                    }
+                    if (symbol.valueDeclaration === node) {
+                        error(n, ts.Diagnostics.Parameter_0_cannot_be_referenced_in_its_initializer, ts.declarationNameToString(node.name));
+                        return;
+                    }
+                    // locals map for function contain both parameters and function locals
+                    // so we need to do a bit of extra work to check if reference is legal
+                    var enclosingContainer = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
+                    if (enclosingContainer === func) {
+                        if (symbol.valueDeclaration.kind === 149 /* Parameter */ ||
+                            symbol.valueDeclaration.kind === 182 /* BindingElement */) {
+                            // it is ok to reference parameter in initializer if either
+                            // - parameter is located strictly on the left of current parameter declaration
+                            if (symbol.valueDeclaration.pos < node.pos) {
+                                return;
+                            }
+                            // - parameter is wrapped in function-like entity
+                            if (ts.findAncestor(n, function (current) {
+                                if (current === node.initializer) {
+                                    return "quit";
+                                }
+                                return ts.isFunctionLike(current.parent) ||
+                                    // computed property names/initializers in instance property declaration of class like entities
+                                    // are executed in constructor and thus deferred
+                                    (current.parent.kind === 152 /* PropertyDeclaration */ &&
+                                        !(ts.hasModifier(current.parent, 32 /* Static */)) &&
+                                        ts.isClassLike(current.parent.parent));
+                            })) {
+                                return;
+                            }
+                            // fall through to report error
+                        }
+                        error(n, ts.Diagnostics.Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it, ts.declarationNameToString(node.name), ts.declarationNameToString(n));
+                    }
+                }
+                else {
+                    return ts.forEachChild(n, visit);
+                }
+            }
+        }
+        function convertAutoToAny(type) {
+            return type === autoType ? anyType : type === autoArrayType ? anyArrayType : type;
+        }
+        // Check variable, parameter, or property declaration
+        function checkVariableLikeDeclaration(node) {
+            checkDecorators(node);
+            if (!ts.isBindingElement(node)) {
+                checkSourceElement(node.type);
+            }
+            // JSDoc `function(string, string): string` syntax results in parameters with no name
+            if (!node.name) {
+                return;
+            }
+            // For a computed property, just check the initializer and exit
+            // Do not use hasDynamicName here, because that returns false for well known symbols.
+            // We want to perform checkComputedPropertyName for all computed properties, including
+            // well known symbols.
+            if (node.name.kind === 147 /* ComputedPropertyName */) {
+                checkComputedPropertyName(node.name);
+                if (node.initializer) {
+                    checkExpressionCached(node.initializer);
+                }
+            }
+            if (node.kind === 182 /* BindingElement */) {
+                if (node.parent.kind === 180 /* ObjectBindingPattern */ && languageVersion < 6 /* ESNext */) {
+                    checkExternalEmitHelpers(node, 4 /* Rest */);
+                }
+                // check computed properties inside property names of binding elements
+                if (node.propertyName && node.propertyName.kind === 147 /* ComputedPropertyName */) {
+                    checkComputedPropertyName(node.propertyName);
+                }
+                // check private/protected variable access
+                var parent = node.parent.parent;
+                var parentType = getTypeForBindingElementParent(parent);
+                var name = node.propertyName || node.name;
+                if (!ts.isBindingPattern(name)) {
+                    var property = getPropertyOfType(parentType, ts.getTextOfPropertyName(name)); // TODO: GH#18217
+                    markPropertyAsReferenced(property, /*nodeForCheckWriteOnly*/ undefined, /*isThisAccess*/ false); // A destructuring is never a write-only reference.
+                    if (parent.initializer && property) {
+                        checkPropertyAccessibility(parent, parent.initializer, parentType, property);
+                    }
+                }
+            }
+            // For a binding pattern, check contained binding elements
+            if (ts.isBindingPattern(node.name)) {
+                if (node.name.kind === 181 /* ArrayBindingPattern */ && languageVersion < 2 /* ES2015 */ && compilerOptions.downlevelIteration) {
+                    checkExternalEmitHelpers(node, 512 /* Read */);
+                }
+                ts.forEach(node.name.elements, checkSourceElement);
+            }
+            // For a parameter declaration with an initializer, error and exit if the containing function doesn't have a body
+            if (node.initializer && ts.getRootDeclaration(node).kind === 149 /* Parameter */ && ts.nodeIsMissing(ts.getContainingFunction(node).body)) {
+                error(node, ts.Diagnostics.A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation);
+                return;
+            }
+            // For a binding pattern, validate the initializer and exit
+            if (ts.isBindingPattern(node.name)) {
+                // Don't validate for-in initializer as it is already an error
+                if (node.initializer && node.parent.parent.kind !== 221 /* ForInStatement */) {
+                    var initializerType = checkExpressionCached(node.initializer);
+                    if (strictNullChecks && node.name.elements.length === 0) {
+                        checkNonNullType(initializerType, node);
+                    }
+                    else {
+                        checkTypeAssignableTo(initializerType, getWidenedTypeForVariableLikeDeclaration(node), node, /*headMessage*/ undefined);
+                    }
+                    checkParameterInitializer(node);
+                }
+                return;
+            }
+            var symbol = getSymbolOfNode(node);
+            var type = convertAutoToAny(getTypeOfSymbol(symbol));
+            if (node === symbol.valueDeclaration) {
+                // Node is the primary declaration of the symbol, just validate the initializer
+                // Don't validate for-in initializer as it is already an error
+                var initializer = ts.getEffectiveInitializer(node);
+                if (initializer && node.parent.parent.kind !== 221 /* ForInStatement */) {
+                    checkTypeAssignableTo(checkExpressionCached(initializer), type, node, /*headMessage*/ undefined);
+                    checkParameterInitializer(node);
+                }
+            }
+            else {
+                // Node is a secondary declaration, check that type is identical to primary declaration and check that
+                // initializer is consistent with type associated with the node
+                var declarationType = convertAutoToAny(getWidenedTypeForVariableLikeDeclaration(node));
+                if (type !== errorType && declarationType !== errorType &&
+                    !isTypeIdenticalTo(type, declarationType) &&
+                    !(symbol.flags & 67108864 /* JSContainer */)) {
+                    errorNextVariableOrPropertyDeclarationMustHaveSameType(type, node, declarationType);
+                }
+                if (node.initializer) {
+                    checkTypeAssignableTo(checkExpressionCached(node.initializer), declarationType, node, /*headMessage*/ undefined);
+                }
+                if (!areDeclarationFlagsIdentical(node, symbol.valueDeclaration)) {
+                    error(ts.getNameOfDeclaration(symbol.valueDeclaration), ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
+                    error(node.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
+                }
+            }
+            if (node.kind !== 152 /* PropertyDeclaration */ && node.kind !== 151 /* PropertySignature */) {
+                // We know we don't have a binding pattern or computed name here
+                checkExportsOnMergedDeclarations(node);
+                if (node.kind === 232 /* VariableDeclaration */ || node.kind === 182 /* BindingElement */) {
+                    checkVarDeclaredNamesNotShadowed(node);
+                }
+                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+            }
+        }
+        function errorNextVariableOrPropertyDeclarationMustHaveSameType(firstType, nextDeclaration, nextType) {
+            var nextDeclarationName = ts.getNameOfDeclaration(nextDeclaration);
+            var message = nextDeclaration.kind === 152 /* PropertyDeclaration */ || nextDeclaration.kind === 151 /* PropertySignature */
+                ? ts.Diagnostics.Subsequent_property_declarations_must_have_the_same_type_Property_0_must_be_of_type_1_but_here_has_type_2
+                : ts.Diagnostics.Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_type_2;
+            error(nextDeclarationName, message, ts.declarationNameToString(nextDeclarationName), typeToString(firstType), typeToString(nextType));
+        }
+        function areDeclarationFlagsIdentical(left, right) {
+            if ((left.kind === 149 /* Parameter */ && right.kind === 232 /* VariableDeclaration */) ||
+                (left.kind === 232 /* VariableDeclaration */ && right.kind === 149 /* Parameter */)) {
+                // Differences in optionality between parameters and variables are allowed.
+                return true;
+            }
+            if (ts.hasQuestionToken(left) !== ts.hasQuestionToken(right)) {
+                return false;
+            }
+            var interestingFlags = 8 /* Private */ |
+                16 /* Protected */ |
+                256 /* Async */ |
+                128 /* Abstract */ |
+                64 /* Readonly */ |
+                32 /* Static */;
+            return ts.getSelectedModifierFlags(left, interestingFlags) === ts.getSelectedModifierFlags(right, interestingFlags);
+        }
+        function checkVariableDeclaration(node) {
+            checkGrammarVariableDeclaration(node);
+            return checkVariableLikeDeclaration(node);
+        }
+        function checkBindingElement(node) {
+            checkGrammarBindingElement(node);
+            return checkVariableLikeDeclaration(node);
+        }
+        function checkVariableStatement(node) {
+            // Grammar checking
+            if (!checkGrammarDecoratorsAndModifiers(node) && !checkGrammarVariableDeclarationList(node.declarationList))
+                checkGrammarForDisallowedLetOrConstStatement(node);
+            ts.forEach(node.declarationList.declarations, checkSourceElement);
+        }
+        function checkExpressionStatement(node) {
+            // Grammar checking
+            checkGrammarStatementInAmbientContext(node);
+            checkExpression(node.expression);
+        }
+        function checkIfStatement(node) {
+            // Grammar checking
+            checkGrammarStatementInAmbientContext(node);
+            checkExpression(node.expression);
+            checkSourceElement(node.thenStatement);
+            if (node.thenStatement.kind === 215 /* EmptyStatement */) {
+                error(node.thenStatement, ts.Diagnostics.The_body_of_an_if_statement_cannot_be_the_empty_statement);
+            }
+            checkSourceElement(node.elseStatement);
+        }
+        function checkDoStatement(node) {
+            // Grammar checking
+            checkGrammarStatementInAmbientContext(node);
+            checkSourceElement(node.statement);
+            checkExpression(node.expression);
+        }
+        function checkWhileStatement(node) {
+            // Grammar checking
+            checkGrammarStatementInAmbientContext(node);
+            checkExpression(node.expression);
+            checkSourceElement(node.statement);
+        }
+        function checkForStatement(node) {
+            // Grammar checking
+            if (!checkGrammarStatementInAmbientContext(node)) {
+                if (node.initializer && node.initializer.kind === 233 /* VariableDeclarationList */) {
+                    checkGrammarVariableDeclarationList(node.initializer);
+                }
+            }
+            if (node.initializer) {
+                if (node.initializer.kind === 233 /* VariableDeclarationList */) {
+                    ts.forEach(node.initializer.declarations, checkVariableDeclaration);
+                }
+                else {
+                    checkExpression(node.initializer);
+                }
+            }
+            if (node.condition)
+                checkExpression(node.condition);
+            if (node.incrementor)
+                checkExpression(node.incrementor);
+            checkSourceElement(node.statement);
+            if (node.locals) {
+                registerForUnusedIdentifiersCheck(node);
+            }
+        }
+        function checkForOfStatement(node) {
+            checkGrammarForInOrForOfStatement(node);
+            if (node.awaitModifier) {
+                var functionFlags = ts.getFunctionFlags(ts.getContainingFunction(node));
+                if ((functionFlags & (4 /* Invalid */ | 2 /* Async */)) === 2 /* Async */ && languageVersion < 6 /* ESNext */) {
+                    // for..await..of in an async function or async generator function prior to ESNext requires the __asyncValues helper
+                    checkExternalEmitHelpers(node, 16384 /* ForAwaitOfIncludes */);
+                }
+            }
+            else if (compilerOptions.downlevelIteration && languageVersion < 2 /* ES2015 */) {
+                // for..of prior to ES2015 requires the __values helper when downlevelIteration is enabled
+                checkExternalEmitHelpers(node, 256 /* ForOfIncludes */);
+            }
+            // Check the LHS and RHS
+            // If the LHS is a declaration, just check it as a variable declaration, which will in turn check the RHS
+            // via checkRightHandSideOfForOf.
+            // If the LHS is an expression, check the LHS, as a destructuring assignment or as a reference.
+            // Then check that the RHS is assignable to it.
+            if (node.initializer.kind === 233 /* VariableDeclarationList */) {
+                checkForInOrForOfVariableDeclaration(node);
+            }
+            else {
+                var varExpr = node.initializer;
+                var iteratedType = checkRightHandSideOfForOf(node.expression, node.awaitModifier);
+                // There may be a destructuring assignment on the left side
+                if (varExpr.kind === 183 /* ArrayLiteralExpression */ || varExpr.kind === 184 /* ObjectLiteralExpression */) {
+                    // iteratedType may be undefined. In this case, we still want to check the structure of
+                    // varExpr, in particular making sure it's a valid LeftHandSideExpression. But we'd like
+                    // to short circuit the type relation checking as much as possible, so we pass the unknownType.
+                    checkDestructuringAssignment(varExpr, iteratedType || errorType);
+                }
+                else {
+                    var leftType = checkExpression(varExpr);
+                    checkReferenceExpression(varExpr, ts.Diagnostics.The_left_hand_side_of_a_for_of_statement_must_be_a_variable_or_a_property_access);
+                    // iteratedType will be undefined if the rightType was missing properties/signatures
+                    // required to get its iteratedType (like [Symbol.iterator] or next). This may be
+                    // because we accessed properties from anyType, or it may have led to an error inside
+                    // getElementTypeOfIterable.
+                    if (iteratedType) {
+                        checkTypeAssignableTo(iteratedType, leftType, varExpr, /*headMessage*/ undefined);
+                    }
+                }
+            }
+            checkSourceElement(node.statement);
+            if (node.locals) {
+                registerForUnusedIdentifiersCheck(node);
+            }
+        }
+        function checkForInStatement(node) {
+            // Grammar checking
+            checkGrammarForInOrForOfStatement(node);
+            var rightType = checkNonNullExpression(node.expression);
+            // TypeScript 1.0 spec (April 2014): 5.4
+            // In a 'for-in' statement of the form
+            // for (let VarDecl in Expr) Statement
+            //   VarDecl must be a variable declaration without a type annotation that declares a variable of type Any,
+            //   and Expr must be an expression of type Any, an object type, or a type parameter type.
+            if (node.initializer.kind === 233 /* VariableDeclarationList */) {
+                var variable = node.initializer.declarations[0];
+                if (variable && ts.isBindingPattern(variable.name)) {
+                    error(variable.name, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern);
+                }
+                checkForInOrForOfVariableDeclaration(node);
+            }
+            else {
+                // In a 'for-in' statement of the form
+                // for (Var in Expr) Statement
+                //   Var must be an expression classified as a reference of type Any or the String primitive type,
+                //   and Expr must be an expression of type Any, an object type, or a type parameter type.
+                var varExpr = node.initializer;
+                var leftType = checkExpression(varExpr);
+                if (varExpr.kind === 183 /* ArrayLiteralExpression */ || varExpr.kind === 184 /* ObjectLiteralExpression */) {
+                    error(varExpr, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern);
+                }
+                else if (!isTypeAssignableTo(getIndexTypeOrString(rightType), leftType)) {
+                    error(varExpr, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any);
+                }
+                else {
+                    // run check only former check succeeded to avoid cascading errors
+                    checkReferenceExpression(varExpr, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_must_be_a_variable_or_a_property_access);
+                }
+            }
+            // unknownType is returned i.e. if node.expression is identifier whose name cannot be resolved
+            // in this case error about missing name is already reported - do not report extra one
+            if (rightType === neverType || !isTypeAssignableToKind(rightType, 16777216 /* NonPrimitive */ | 14745600 /* InstantiableNonPrimitive */)) {
+                error(node.expression, ts.Diagnostics.The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter_but_here_has_type_0, typeToString(rightType));
+            }
+            checkSourceElement(node.statement);
+            if (node.locals) {
+                registerForUnusedIdentifiersCheck(node);
+            }
+        }
+        function checkForInOrForOfVariableDeclaration(iterationStatement) {
+            var variableDeclarationList = iterationStatement.initializer;
+            // checkGrammarForInOrForOfStatement will check that there is exactly one declaration.
+            if (variableDeclarationList.declarations.length >= 1) {
+                var decl = variableDeclarationList.declarations[0];
+                checkVariableDeclaration(decl);
+            }
+        }
+        function checkRightHandSideOfForOf(rhsExpression, awaitModifier) {
+            var expressionType = checkNonNullExpression(rhsExpression);
+            return checkIteratedTypeOrElementType(expressionType, rhsExpression, /*allowStringInput*/ true, awaitModifier !== undefined);
+        }
+        function checkIteratedTypeOrElementType(inputType, errorNode, allowStringInput, allowAsyncIterables) {
+            if (isTypeAny(inputType)) {
+                return inputType;
+            }
+            return getIteratedTypeOrElementType(inputType, errorNode, allowStringInput, allowAsyncIterables, /*checkAssignability*/ true) || anyType;
+        }
+        /**
+         * When consuming an iterable type in a for..of, spread, or iterator destructuring assignment
+         * we want to get the iterated type of an iterable for ES2015 or later, or the iterated type
+         * of a iterable (if defined globally) or element type of an array like for ES2015 or earlier.
+         */
+        function getIteratedTypeOrElementType(inputType, errorNode, allowStringInput, allowAsyncIterables, checkAssignability) {
+            if (inputType === neverType) {
+                reportTypeNotIterableError(errorNode, inputType, allowAsyncIterables); // TODO: GH#18217
+                return undefined;
+            }
+            var uplevelIteration = languageVersion >= 2 /* ES2015 */;
+            var downlevelIteration = !uplevelIteration && compilerOptions.downlevelIteration;
+            // Get the iterated type of an `Iterable<T>` or `IterableIterator<T>` only in ES2015
+            // or higher, when inside of an async generator or for-await-if, or when
+            // downlevelIteration is requested.
+            if (uplevelIteration || downlevelIteration || allowAsyncIterables) {
+                // We only report errors for an invalid iterable type in ES2015 or higher.
+                var iteratedType = getIteratedTypeOfIterable(inputType, uplevelIteration ? errorNode : undefined, allowAsyncIterables, /*allowSyncIterables*/ true, checkAssignability);
+                if (iteratedType || uplevelIteration) {
+                    return iteratedType;
+                }
+            }
+            var arrayType = inputType;
+            var reportedError = false;
+            var hasStringConstituent = false;
+            // If strings are permitted, remove any string-like constituents from the array type.
+            // This allows us to find other non-string element types from an array unioned with
+            // a string.
+            if (allowStringInput) {
+                if (arrayType.flags & 262144 /* Union */) {
+                    // After we remove all types that are StringLike, we will know if there was a string constituent
+                    // based on whether the result of filter is a new array.
+                    var arrayTypes = inputType.types;
+                    var filteredTypes = ts.filter(arrayTypes, function (t) { return !(t.flags & 68 /* StringLike */); });
+                    if (filteredTypes !== arrayTypes) {
+                        arrayType = getUnionType(filteredTypes, 2 /* Subtype */);
+                    }
+                }
+                else if (arrayType.flags & 68 /* StringLike */) {
+                    arrayType = neverType;
+                }
+                hasStringConstituent = arrayType !== inputType;
+                if (hasStringConstituent) {
+                    if (languageVersion < 1 /* ES5 */) {
+                        if (errorNode) {
+                            error(errorNode, ts.Diagnostics.Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher);
+                            reportedError = true;
+                        }
+                    }
+                    // Now that we've removed all the StringLike types, if no constituents remain, then the entire
+                    // arrayOrStringType was a string.
+                    if (arrayType.flags & 32768 /* Never */) {
+                        return stringType;
+                    }
+                }
+            }
+            if (!isArrayLikeType(arrayType)) {
+                if (errorNode && !reportedError) {
+                    // Which error we report depends on whether we allow strings or if there was a
+                    // string constituent. For example, if the input type is number | string, we
+                    // want to say that number is not an array type. But if the input was just
+                    // number and string input is allowed, we want to say that number is not an
+                    // array type or a string type.
+                    var isIterable = !!getIteratedTypeOfIterable(inputType, /* errorNode */ undefined, allowAsyncIterables, /*allowSyncIterables*/ true, checkAssignability);
+                    var diagnostic = !allowStringInput || hasStringConstituent
+                        ? downlevelIteration
+                            ? ts.Diagnostics.Type_0_is_not_an_array_type_or_does_not_have_a_Symbol_iterator_method_that_returns_an_iterator
+                            : isIterable
+                                ? ts.Diagnostics.Type_0_is_not_an_array_type_Use_compiler_option_downlevelIteration_to_allow_iterating_of_iterators
+                                : ts.Diagnostics.Type_0_is_not_an_array_type
+                        : downlevelIteration
+                            ? ts.Diagnostics.Type_0_is_not_an_array_type_or_a_string_type_or_does_not_have_a_Symbol_iterator_method_that_returns_an_iterator
+                            : isIterable
+                                ? ts.Diagnostics.Type_0_is_not_an_array_type_or_a_string_type_Use_compiler_option_downlevelIteration_to_allow_iterating_of_iterators
+                                : ts.Diagnostics.Type_0_is_not_an_array_type_or_a_string_type;
+                    error(errorNode, diagnostic, typeToString(arrayType));
+                }
+                return hasStringConstituent ? stringType : undefined;
+            }
+            var arrayElementType = getIndexTypeOfType(arrayType, 1 /* Number */);
+            if (hasStringConstituent && arrayElementType) {
+                // This is just an optimization for the case where arrayOrStringType is string | string[]
+                if (arrayElementType.flags & 68 /* StringLike */) {
+                    return stringType;
+                }
+                return getUnionType([arrayElementType, stringType], 2 /* Subtype */);
+            }
+            return arrayElementType;
+        }
+        /**
+         * We want to treat type as an iterable, and get the type it is an iterable of. The iterable
+         * must have the following structure (annotated with the names of the variables below):
+         *
+         *     { // iterable
+         *         [Symbol.iterator]: { // iteratorMethod
+         *             (): Iterator<T>
+         *         }
+         *     }
+         *
+         * For an async iterable, we expect the following structure:
+         *
+         *     { // iterable
+         *         [Symbol.asyncIterator]: { // iteratorMethod
+         *             (): AsyncIterator<T>
+         *         }
+         *     }
+         *
+         * T is the type we are after. At every level that involves analyzing return types
+         * of signatures, we union the return types of all the signatures.
+         *
+         * Another thing to note is that at any step of this process, we could run into a dead end,
+         * meaning either the property is missing, or we run into the anyType. If either of these things
+         * happens, we return undefined to signal that we could not find the iterated type. If a property
+         * is missing, and the previous step did not result in 'any', then we also give an error if the
+         * caller requested it. Then the caller can decide what to do in the case where there is no iterated
+         * type. This is different from returning anyType, because that would signify that we have matched the
+         * whole pattern and that T (above) is 'any'.
+         *
+         * For a **for-of** statement, `yield*` (in a normal generator), spread, array
+         * destructuring, or normal generator we will only ever look for a `[Symbol.iterator]()`
+         * method.
+         *
+         * For an async generator we will only ever look at the `[Symbol.asyncIterator]()` method.
+         *
+         * For a **for-await-of** statement or a `yield*` in an async generator we will look for
+         * the `[Symbol.asyncIterator]()` method first, and then the `[Symbol.iterator]()` method.
+         */
+        function getIteratedTypeOfIterable(type, errorNode, allowAsyncIterables, allowSyncIterables, checkAssignability) {
+            if (isTypeAny(type)) {
+                return undefined;
+            }
+            return mapType(type, getIteratedType);
+            function getIteratedType(type) {
+                var typeAsIterable = type;
+                if (allowAsyncIterables) {
+                    if (typeAsIterable.iteratedTypeOfAsyncIterable) {
+                        return typeAsIterable.iteratedTypeOfAsyncIterable;
+                    }
+                    // As an optimization, if the type is an instantiation of the global `AsyncIterable<T>`
+                    // or the global `AsyncIterableIterator<T>` then just grab its type argument.
+                    if (isReferenceToType(type, getGlobalAsyncIterableType(/*reportErrors*/ false)) ||
+                        isReferenceToType(type, getGlobalAsyncIterableIteratorType(/*reportErrors*/ false))) {
+                        return typeAsIterable.iteratedTypeOfAsyncIterable = type.typeArguments[0];
+                    }
+                }
+                if (allowSyncIterables) {
+                    if (typeAsIterable.iteratedTypeOfIterable) {
+                        return typeAsIterable.iteratedTypeOfIterable;
+                    }
+                    // As an optimization, if the type is an instantiation of the global `Iterable<T>` or
+                    // `IterableIterator<T>` then just grab its type argument.
+                    if (isReferenceToType(type, getGlobalIterableType(/*reportErrors*/ false)) ||
+                        isReferenceToType(type, getGlobalIterableIteratorType(/*reportErrors*/ false))) {
+                        return typeAsIterable.iteratedTypeOfIterable = type.typeArguments[0];
+                    }
+                }
+                var asyncMethodType = allowAsyncIterables && getTypeOfPropertyOfType(type, ts.getPropertyNameForKnownSymbolName("asyncIterator"));
+                var methodType = asyncMethodType || (allowSyncIterables ? getTypeOfPropertyOfType(type, ts.getPropertyNameForKnownSymbolName("iterator")) : undefined);
+                if (isTypeAny(methodType)) {
+                    return undefined;
+                }
+                var signatures = methodType ? getSignaturesOfType(methodType, 0 /* Call */) : undefined;
+                if (!ts.some(signatures)) {
+                    if (errorNode) {
+                        // only report on the first error
+                        reportTypeNotIterableError(errorNode, type, allowAsyncIterables);
+                        errorNode = undefined;
+                    }
+                    return undefined;
+                }
+                var returnType = getUnionType(ts.map(signatures, getReturnTypeOfSignature), 2 /* Subtype */);
+                var iteratedType = getIteratedTypeOfIterator(returnType, errorNode, /*isAsyncIterator*/ !!asyncMethodType);
+                if (checkAssignability && errorNode && iteratedType) {
+                    // If `checkAssignability` was specified, we were called from
+                    // `checkIteratedTypeOrElementType`. As such, we need to validate that
+                    // the type passed in is actually an Iterable.
+                    checkTypeAssignableTo(type, asyncMethodType
+                        ? createAsyncIterableType(iteratedType)
+                        : createIterableType(iteratedType), errorNode);
+                }
+                return asyncMethodType
+                    ? typeAsIterable.iteratedTypeOfAsyncIterable = iteratedType
+                    : typeAsIterable.iteratedTypeOfIterable = iteratedType;
+            }
+        }
+        function reportTypeNotIterableError(errorNode, type, allowAsyncIterables) {
+            error(errorNode, allowAsyncIterables
+                ? ts.Diagnostics.Type_0_must_have_a_Symbol_asyncIterator_method_that_returns_an_async_iterator
+                : ts.Diagnostics.Type_0_must_have_a_Symbol_iterator_method_that_returns_an_iterator, typeToString(type));
+        }
+        /**
+         * This function has very similar logic as getIteratedTypeOfIterable, except that it operates on
+         * Iterators instead of Iterables. Here is the structure:
+         *
+         *  { // iterator
+         *      next: { // nextMethod
+         *          (): { // nextResult
+         *              value: T // nextValue
+         *          }
+         *      }
+         *  }
+         *
+         * For an async iterator, we expect the following structure:
+         *
+         *  { // iterator
+         *      next: { // nextMethod
+         *          (): PromiseLike<{ // nextResult
+         *              value: T // nextValue
+         *          }>
+         *      }
+         *  }
+         */
+        function getIteratedTypeOfIterator(type, errorNode, isAsyncIterator) {
+            if (isTypeAny(type)) {
+                return undefined;
+            }
+            var typeAsIterator = type;
+            if (isAsyncIterator ? typeAsIterator.iteratedTypeOfAsyncIterator : typeAsIterator.iteratedTypeOfIterator) {
+                return isAsyncIterator ? typeAsIterator.iteratedTypeOfAsyncIterator : typeAsIterator.iteratedTypeOfIterator;
+            }
+            // As an optimization, if the type is an instantiation of the global `Iterator<T>` (for
+            // a non-async iterator) or the global `AsyncIterator<T>` (for an async-iterator) then
+            // just grab its type argument.
+            var getIteratorType = isAsyncIterator ? getGlobalAsyncIteratorType : getGlobalIteratorType;
+            if (isReferenceToType(type, getIteratorType(/*reportErrors*/ false))) {
+                return isAsyncIterator
+                    ? typeAsIterator.iteratedTypeOfAsyncIterator = type.typeArguments[0]
+                    : typeAsIterator.iteratedTypeOfIterator = type.typeArguments[0];
+            }
+            // Both async and non-async iterators must have a `next` method.
+            var nextMethod = getTypeOfPropertyOfType(type, "next");
+            if (isTypeAny(nextMethod)) {
+                return undefined;
+            }
+            var nextMethodSignatures = nextMethod ? getSignaturesOfType(nextMethod, 0 /* Call */) : ts.emptyArray;
+            if (nextMethodSignatures.length === 0) {
+                if (errorNode) {
+                    error(errorNode, isAsyncIterator
+                        ? ts.Diagnostics.An_async_iterator_must_have_a_next_method
+                        : ts.Diagnostics.An_iterator_must_have_a_next_method);
+                }
+                return undefined;
+            }
+            var nextResult = getUnionType(ts.map(nextMethodSignatures, getReturnTypeOfSignature), 2 /* Subtype */);
+            if (isTypeAny(nextResult)) {
+                return undefined;
+            }
+            // For an async iterator, we must get the awaited type of the return type.
+            if (isAsyncIterator) {
+                nextResult = getAwaitedTypeOfPromise(nextResult, errorNode, ts.Diagnostics.The_type_returned_by_the_next_method_of_an_async_iterator_must_be_a_promise_for_a_type_with_a_value_property);
+                if (isTypeAny(nextResult)) {
+                    return undefined;
+                }
+            }
+            var nextValue = nextResult && getTypeOfPropertyOfType(nextResult, "value");
+            if (!nextValue) {
+                if (errorNode) {
+                    error(errorNode, isAsyncIterator
+                        ? ts.Diagnostics.The_type_returned_by_the_next_method_of_an_async_iterator_must_be_a_promise_for_a_type_with_a_value_property
+                        : ts.Diagnostics.The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property);
+                }
+                return undefined;
+            }
+            return isAsyncIterator
+                ? typeAsIterator.iteratedTypeOfAsyncIterator = nextValue
+                : typeAsIterator.iteratedTypeOfIterator = nextValue;
+        }
+        /**
+         * A generator may have a return type of `Iterator<T>`, `Iterable<T>`, or
+         * `IterableIterator<T>`. An async generator may have a return type of `AsyncIterator<T>`,
+         * `AsyncIterable<T>`, or `AsyncIterableIterator<T>`. This function can be used to extract
+         * the iterated type from this return type for contextual typing and verifying signatures.
+         */
+        function getIteratedTypeOfGenerator(returnType, isAsyncGenerator) {
+            if (isTypeAny(returnType)) {
+                return undefined;
+            }
+            return getIteratedTypeOfIterable(returnType, /*errorNode*/ undefined, /*allowAsyncIterables*/ isAsyncGenerator, /*allowSyncIterables*/ !isAsyncGenerator, /*checkAssignability*/ false)
+                || getIteratedTypeOfIterator(returnType, /*errorNode*/ undefined, isAsyncGenerator);
+        }
+        function checkBreakOrContinueStatement(node) {
+            // Grammar checking
+            if (!checkGrammarStatementInAmbientContext(node))
+                checkGrammarBreakOrContinueStatement(node);
+            // TODO: Check that target label is valid
+        }
+        function isGetAccessorWithAnnotatedSetAccessor(node) {
+            return node.kind === 156 /* GetAccessor */
+                && ts.getEffectiveSetAccessorTypeAnnotationNode(ts.getDeclarationOfKind(node.symbol, 157 /* SetAccessor */)) !== undefined;
+        }
+        function isUnwrappedReturnTypeVoidOrAny(func, returnType) {
+            var unwrappedReturnType = (ts.getFunctionFlags(func) & 3 /* AsyncGenerator */) === 2 /* Async */
+                ? getPromisedTypeOfPromise(returnType) // Async function
+                : returnType; // AsyncGenerator function, Generator function, or normal function
+            return !!unwrappedReturnType && maybeTypeOfKind(unwrappedReturnType, 4096 /* Void */ | 3 /* AnyOrUnknown */);
+        }
+        function checkReturnStatement(node) {
+            // Grammar checking
+            if (checkGrammarStatementInAmbientContext(node)) {
+                return;
+            }
+            var func = ts.getContainingFunction(node);
+            if (!func) {
+                grammarErrorOnFirstToken(node, ts.Diagnostics.A_return_statement_can_only_be_used_within_a_function_body);
+                return;
+            }
+            var signature = getSignatureFromDeclaration(func);
+            var returnType = getReturnTypeOfSignature(signature);
+            var functionFlags = ts.getFunctionFlags(func);
+            var isGenerator = functionFlags & 1 /* Generator */;
+            if (strictNullChecks || node.expression || returnType.flags & 32768 /* Never */) {
+                var exprType = node.expression ? checkExpressionCached(node.expression) : undefinedType;
+                if (isGenerator) { // AsyncGenerator function or Generator function
+                    // A generator does not need its return expressions checked against its return type.
+                    // Instead, the yield expressions are checked against the element type.
+                    // TODO: Check return types of generators when return type tracking is added
+                    // for generators.
+                    return;
+                }
+                else if (func.kind === 157 /* SetAccessor */) {
+                    if (node.expression) {
+                        error(node, ts.Diagnostics.Setters_cannot_return_a_value);
+                    }
+                }
+                else if (func.kind === 155 /* Constructor */) {
+                    if (node.expression && !checkTypeAssignableTo(exprType, returnType, node)) {
+                        error(node, ts.Diagnostics.Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class);
+                    }
+                }
+                else if (ts.getEffectiveReturnTypeNode(func) || isGetAccessorWithAnnotatedSetAccessor(func)) {
+                    if (functionFlags & 2 /* Async */) { // Async function
+                        var promisedType = getPromisedTypeOfPromise(returnType);
+                        var awaitedType = checkAwaitedType(exprType, node, ts.Diagnostics.The_return_type_of_an_async_function_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member);
+                        if (promisedType) {
+                            // If the function has a return type, but promisedType is
+                            // undefined, an error will be reported in checkAsyncFunctionReturnType
+                            // so we don't need to report one here.
+                            checkTypeAssignableTo(awaitedType, promisedType, node);
+                        }
+                    }
+                    else {
+                        checkTypeAssignableTo(exprType, returnType, node);
+                    }
+                }
+            }
+            else if (func.kind !== 155 /* Constructor */ && compilerOptions.noImplicitReturns && !isUnwrappedReturnTypeVoidOrAny(func, returnType) && !isGenerator) {
+                // The function has a return type, but the return statement doesn't have an expression.
+                error(node, ts.Diagnostics.Not_all_code_paths_return_a_value);
+            }
+        }
+        function checkWithStatement(node) {
+            // Grammar checking for withStatement
+            if (!checkGrammarStatementInAmbientContext(node)) {
+                if (node.flags & 16384 /* AwaitContext */) {
+                    grammarErrorOnFirstToken(node, ts.Diagnostics.with_statements_are_not_allowed_in_an_async_function_block);
+                }
+            }
+            checkExpression(node.expression);
+            var sourceFile = ts.getSourceFileOfNode(node);
+            if (!hasParseDiagnostics(sourceFile)) {
+                var start = ts.getSpanOfTokenAtPosition(sourceFile, node.pos).start;
+                var end = node.statement.pos;
+                grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.The_with_statement_is_not_supported_All_symbols_in_a_with_block_will_have_type_any);
+            }
+        }
+        function checkSwitchStatement(node) {
+            // Grammar checking
+            checkGrammarStatementInAmbientContext(node);
+            var firstDefaultClause;
+            var hasDuplicateDefaultClause = false;
+            var expressionType = checkExpression(node.expression);
+            var expressionIsLiteral = isLiteralType(expressionType);
+            ts.forEach(node.caseBlock.clauses, function (clause) {
+                // Grammar check for duplicate default clauses, skip if we already report duplicate default clause
+                if (clause.kind === 267 /* DefaultClause */ && !hasDuplicateDefaultClause) {
+                    if (firstDefaultClause === undefined) {
+                        firstDefaultClause = clause;
+                    }
+                    else {
+                        var sourceFile = ts.getSourceFileOfNode(node);
+                        var start = ts.skipTrivia(sourceFile.text, clause.pos);
+                        var end = clause.statements.length > 0 ? clause.statements[0].pos : clause.end;
+                        grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.A_default_clause_cannot_appear_more_than_once_in_a_switch_statement);
+                        hasDuplicateDefaultClause = true;
+                    }
+                }
+                if (produceDiagnostics && clause.kind === 266 /* CaseClause */) {
+                    // TypeScript 1.0 spec (April 2014): 5.9
+                    // In a 'switch' statement, each 'case' expression must be of a type that is comparable
+                    // to or from the type of the 'switch' expression.
+                    var caseType = checkExpression(clause.expression);
+                    var caseIsLiteral = isLiteralType(caseType);
+                    var comparedExpressionType = expressionType;
+                    if (!caseIsLiteral || !expressionIsLiteral) {
+                        caseType = caseIsLiteral ? getBaseTypeOfLiteralType(caseType) : caseType;
+                        comparedExpressionType = getBaseTypeOfLiteralType(expressionType);
+                    }
+                    if (!isTypeEqualityComparableTo(comparedExpressionType, caseType)) {
+                        // expressionType is not comparable to caseType, try the reversed check and report errors if it fails
+                        checkTypeComparableTo(caseType, comparedExpressionType, clause.expression, /*headMessage*/ undefined);
+                    }
+                }
+                ts.forEach(clause.statements, checkSourceElement);
+            });
+            if (node.caseBlock.locals) {
+                registerForUnusedIdentifiersCheck(node.caseBlock);
+            }
+        }
+        function checkLabeledStatement(node) {
+            // Grammar checking
+            if (!checkGrammarStatementInAmbientContext(node)) {
+                ts.findAncestor(node.parent, function (current) {
+                    if (ts.isFunctionLike(current)) {
+                        return "quit";
+                    }
+                    if (current.kind === 228 /* LabeledStatement */ && current.label.escapedText === node.label.escapedText) {
+                        grammarErrorOnNode(node.label, ts.Diagnostics.Duplicate_label_0, ts.getTextOfNode(node.label));
+                        return true;
+                    }
+                    return false;
+                });
+            }
+            // ensure that label is unique
+            checkSourceElement(node.statement);
+        }
+        function checkThrowStatement(node) {
+            // Grammar checking
+            if (!checkGrammarStatementInAmbientContext(node)) {
+                if (node.expression === undefined) {
+                    grammarErrorAfterFirstToken(node, ts.Diagnostics.Line_break_not_permitted_here);
+                }
+            }
+            if (node.expression) {
+                checkExpression(node.expression);
+            }
+        }
+        function checkTryStatement(node) {
+            // Grammar checking
+            checkGrammarStatementInAmbientContext(node);
+            checkBlock(node.tryBlock);
+            var catchClause = node.catchClause;
+            if (catchClause) {
+                // Grammar checking
+                if (catchClause.variableDeclaration) {
+                    if (catchClause.variableDeclaration.type) {
+                        grammarErrorOnFirstToken(catchClause.variableDeclaration.type, ts.Diagnostics.Catch_clause_variable_cannot_have_a_type_annotation);
+                    }
+                    else if (catchClause.variableDeclaration.initializer) {
+                        grammarErrorOnFirstToken(catchClause.variableDeclaration.initializer, ts.Diagnostics.Catch_clause_variable_cannot_have_an_initializer);
+                    }
+                    else {
+                        var blockLocals_1 = catchClause.block.locals;
+                        if (blockLocals_1) {
+                            ts.forEachKey(catchClause.locals, function (caughtName) {
+                                var blockLocal = blockLocals_1.get(caughtName);
+                                if (blockLocal && (blockLocal.flags & 2 /* BlockScopedVariable */) !== 0) {
+                                    grammarErrorOnNode(blockLocal.valueDeclaration, ts.Diagnostics.Cannot_redeclare_identifier_0_in_catch_clause, caughtName);
+                                }
+                            });
+                        }
+                    }
+                }
+                checkBlock(catchClause.block);
+            }
+            if (node.finallyBlock) {
+                checkBlock(node.finallyBlock);
+            }
+        }
+        function checkIndexConstraints(type) {
+            var declaredNumberIndexer = getIndexDeclarationOfSymbol(type.symbol, 1 /* Number */);
+            var declaredStringIndexer = getIndexDeclarationOfSymbol(type.symbol, 0 /* String */);
+            var stringIndexType = getIndexTypeOfType(type, 0 /* String */);
+            var numberIndexType = getIndexTypeOfType(type, 1 /* Number */);
+            if (stringIndexType || numberIndexType) {
+                ts.forEach(getPropertiesOfObjectType(type), function (prop) {
+                    var propType = getTypeOfSymbol(prop);
+                    checkIndexConstraintForProperty(prop, propType, type, declaredStringIndexer, stringIndexType, 0 /* String */);
+                    checkIndexConstraintForProperty(prop, propType, type, declaredNumberIndexer, numberIndexType, 1 /* Number */);
+                });
+                var classDeclaration = type.symbol.valueDeclaration;
+                if (ts.getObjectFlags(type) & 1 /* Class */ && ts.isClassLike(classDeclaration)) {
+                    for (var _i = 0, _a = classDeclaration.members; _i < _a.length; _i++) {
+                        var member = _a[_i];
+                        // Only process instance properties with computed names here.
+                        // Static properties cannot be in conflict with indexers,
+                        // and properties with literal names were already checked.
+                        if (!ts.hasModifier(member, 32 /* Static */) && hasNonBindableDynamicName(member)) {
+                            var symbol = getSymbolOfNode(member);
+                            var propType = getTypeOfSymbol(symbol);
+                            checkIndexConstraintForProperty(symbol, propType, type, declaredStringIndexer, stringIndexType, 0 /* String */);
+                            checkIndexConstraintForProperty(symbol, propType, type, declaredNumberIndexer, numberIndexType, 1 /* Number */);
+                        }
+                    }
+                }
+            }
+            var errorNode;
+            if (stringIndexType && numberIndexType) {
+                errorNode = declaredNumberIndexer || declaredStringIndexer;
+                // condition 'errorNode === undefined' may appear if types does not declare nor string neither number indexer
+                if (!errorNode && (ts.getObjectFlags(type) & 2 /* Interface */)) {
+                    var someBaseTypeHasBothIndexers = ts.forEach(getBaseTypes(type), function (base) { return getIndexTypeOfType(base, 0 /* String */) && getIndexTypeOfType(base, 1 /* Number */); });
+                    errorNode = someBaseTypeHasBothIndexers ? undefined : type.symbol.declarations[0];
+                }
+            }
+            if (errorNode && !isTypeAssignableTo(numberIndexType, stringIndexType)) { // TODO: GH#18217
+                error(errorNode, ts.Diagnostics.Numeric_index_type_0_is_not_assignable_to_string_index_type_1, typeToString(numberIndexType), typeToString(stringIndexType));
+            }
+            function checkIndexConstraintForProperty(prop, propertyType, containingType, indexDeclaration, indexType, indexKind) {
+                // ESSymbol properties apply to neither string nor numeric indexers.
+                if (!indexType || ts.isKnownSymbol(prop)) {
+                    return;
+                }
+                var propDeclaration = prop.valueDeclaration;
+                // index is numeric and property name is not valid numeric literal
+                if (indexKind === 1 /* Number */ && !(propDeclaration ? isNumericName(ts.getNameOfDeclaration(propDeclaration)) : isNumericLiteralName(prop.escapedName))) {
+                    return;
+                }
+                // perform property check if property or indexer is declared in 'type'
+                // this allows us to rule out cases when both property and indexer are inherited from the base class
+                var errorNode;
+                if (propDeclaration &&
+                    (propDeclaration.kind === 200 /* BinaryExpression */ ||
+                        ts.getNameOfDeclaration(propDeclaration).kind === 147 /* ComputedPropertyName */ ||
+                        prop.parent === containingType.symbol)) {
+                    errorNode = propDeclaration;
+                }
+                else if (indexDeclaration) {
+                    errorNode = indexDeclaration;
+                }
+                else if (ts.getObjectFlags(containingType) & 2 /* Interface */) {
+                    // for interfaces property and indexer might be inherited from different bases
+                    // check if any base class already has both property and indexer.
+                    // check should be performed only if 'type' is the first type that brings property\indexer together
+                    var someBaseClassHasBothPropertyAndIndexer = ts.forEach(getBaseTypes(containingType), function (base) { return getPropertyOfObjectType(base, prop.escapedName) && getIndexTypeOfType(base, indexKind); });
+                    errorNode = someBaseClassHasBothPropertyAndIndexer ? undefined : containingType.symbol.declarations[0];
+                }
+                if (errorNode && !isTypeAssignableTo(propertyType, indexType)) {
+                    var errorMessage = indexKind === 0 /* String */
+                        ? ts.Diagnostics.Property_0_of_type_1_is_not_assignable_to_string_index_type_2
+                        : ts.Diagnostics.Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2;
+                    error(errorNode, errorMessage, symbolToString(prop), typeToString(propertyType), typeToString(indexType));
+                }
+            }
+        }
+        function checkTypeNameIsReserved(name, message) {
+            // TS 1.0 spec (April 2014): 3.6.1
+            // The predefined type keywords are reserved and cannot be used as names of user defined types.
+            switch (name.escapedText) {
+                case "any":
+                case "unknown":
+                case "number":
+                case "boolean":
+                case "string":
+                case "symbol":
+                case "void":
+                case "object":
+                    error(name, message, name.escapedText);
+            }
+        }
+        /**
+         * The name cannot be used as 'Object' of user defined types with special target.
+         */
+        function checkClassNameCollisionWithObject(name) {
+            if (languageVersion === 1 /* ES5 */ && name.escapedText === "Object"
+                && moduleKind !== ts.ModuleKind.ES2015 && moduleKind !== ts.ModuleKind.ESNext) {
+                error(name, ts.Diagnostics.Class_name_cannot_be_Object_when_targeting_ES5_with_module_0, ts.ModuleKind[moduleKind]); // https://github.com/Microsoft/TypeScript/issues/17494
+            }
+        }
+        /**
+         * Check each type parameter and check that type parameters have no duplicate type parameter declarations
+         */
+        function checkTypeParameters(typeParameterDeclarations) {
+            if (typeParameterDeclarations) {
+                var seenDefault = false;
+                for (var i = 0; i < typeParameterDeclarations.length; i++) {
+                    var node = typeParameterDeclarations[i];
+                    checkTypeParameter(node);
+                    if (produceDiagnostics) {
+                        if (node.default) {
+                            seenDefault = true;
+                        }
+                        else if (seenDefault) {
+                            error(node, ts.Diagnostics.Required_type_parameters_may_not_follow_optional_type_parameters);
+                        }
+                        for (var j = 0; j < i; j++) {
+                            if (typeParameterDeclarations[j].symbol === node.symbol) {
+                                error(node.name, ts.Diagnostics.Duplicate_identifier_0, ts.declarationNameToString(node.name));
+                            }
+                        }
+                    }
+                }
+            }
+        }
+        /** Check that type parameter lists are identical across multiple declarations */
+        function checkTypeParameterListsIdentical(symbol) {
+            if (symbol.declarations.length === 1) {
+                return;
+            }
+            var links = getSymbolLinks(symbol);
+            if (!links.typeParametersChecked) {
+                links.typeParametersChecked = true;
+                var declarations = getClassOrInterfaceDeclarationsOfSymbol(symbol);
+                if (declarations.length <= 1) {
+                    return;
+                }
+                var type = getDeclaredTypeOfSymbol(symbol);
+                if (!areTypeParametersIdentical(declarations, type.localTypeParameters)) {
+                    // Report an error on every conflicting declaration.
+                    var name = symbolToString(symbol);
+                    for (var _i = 0, declarations_6 = declarations; _i < declarations_6.length; _i++) {
+                        var declaration = declarations_6[_i];
+                        error(declaration.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_type_parameters, name);
+                    }
+                }
+            }
+        }
+        function areTypeParametersIdentical(declarations, targetParameters) {
+            var maxTypeArgumentCount = ts.length(targetParameters);
+            var minTypeArgumentCount = getMinTypeArgumentCount(targetParameters);
+            for (var _i = 0, declarations_7 = declarations; _i < declarations_7.length; _i++) {
+                var declaration = declarations_7[_i];
+                // If this declaration has too few or too many type parameters, we report an error
+                var sourceParameters = ts.getEffectiveTypeParameterDeclarations(declaration);
+                var numTypeParameters = sourceParameters.length;
+                if (numTypeParameters < minTypeArgumentCount || numTypeParameters > maxTypeArgumentCount) {
+                    return false;
+                }
+                for (var i = 0; i < numTypeParameters; i++) {
+                    var source = sourceParameters[i];
+                    var target = targetParameters[i];
+                    // If the type parameter node does not have the same as the resolved type
+                    // parameter at this position, we report an error.
+                    if (source.name.escapedText !== target.symbol.escapedName) {
+                        return false;
+                    }
+                    // If the type parameter node does not have an identical constraint as the resolved
+                    // type parameter at this position, we report an error.
+                    var sourceConstraint = source.constraint && getTypeFromTypeNode(source.constraint);
+                    var targetConstraint = getConstraintFromTypeParameter(target);
+                    if (sourceConstraint) {
+                        // relax check if later interface augmentation has no constraint
+                        if (!targetConstraint || !isTypeIdenticalTo(sourceConstraint, targetConstraint)) {
+                            return false;
+                        }
+                    }
+                    // If the type parameter node has a default and it is not identical to the default
+                    // for the type parameter at this position, we report an error.
+                    var sourceDefault = source.default && getTypeFromTypeNode(source.default);
+                    var targetDefault = getDefaultFromTypeParameter(target);
+                    if (sourceDefault && targetDefault && !isTypeIdenticalTo(sourceDefault, targetDefault)) {
+                        return false;
+                    }
+                }
+            }
+            return true;
+        }
+        function checkClassExpression(node) {
+            checkClassLikeDeclaration(node);
+            checkNodeDeferred(node);
+            return getTypeOfSymbol(getSymbolOfNode(node));
+        }
+        function checkClassExpressionDeferred(node) {
+            ts.forEach(node.members, checkSourceElement);
+            registerForUnusedIdentifiersCheck(node);
+        }
+        function checkClassDeclaration(node) {
+            if (!node.name && !ts.hasModifier(node, 512 /* Default */)) {
+                grammarErrorOnFirstToken(node, ts.Diagnostics.A_class_declaration_without_the_default_modifier_must_have_a_name);
+            }
+            checkClassLikeDeclaration(node);
+            ts.forEach(node.members, checkSourceElement);
+            registerForUnusedIdentifiersCheck(node);
+        }
+        function checkClassLikeDeclaration(node) {
+            checkGrammarClassLikeDeclaration(node);
+            checkDecorators(node);
+            if (node.name) {
+                checkTypeNameIsReserved(node.name, ts.Diagnostics.Class_name_cannot_be_0);
+                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+                if (!(node.flags & 4194304 /* Ambient */)) {
+                    checkClassNameCollisionWithObject(node.name);
+                }
+            }
+            checkTypeParameters(ts.getEffectiveTypeParameterDeclarations(node));
+            checkExportsOnMergedDeclarations(node);
+            var symbol = getSymbolOfNode(node);
+            var type = getDeclaredTypeOfSymbol(symbol);
+            var typeWithThis = getTypeWithThisArgument(type);
+            var staticType = getTypeOfSymbol(symbol);
+            checkTypeParameterListsIdentical(symbol);
+            checkClassForDuplicateDeclarations(node);
+            // Only check for reserved static identifiers on non-ambient context.
+            if (!(node.flags & 4194304 /* Ambient */)) {
+                checkClassForStaticPropertyNameConflicts(node);
+            }
+            var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
+            if (baseTypeNode) {
+                if (languageVersion < 2 /* ES2015 */) {
+                    checkExternalEmitHelpers(baseTypeNode.parent, 1 /* Extends */);
+                }
+                var baseTypes = getBaseTypes(type);
+                if (baseTypes.length && produceDiagnostics) {
+                    var baseType_1 = baseTypes[0];
+                    var baseConstructorType = getBaseConstructorTypeOfClass(type);
+                    var staticBaseType = getApparentType(baseConstructorType);
+                    checkBaseTypeAccessibility(staticBaseType, baseTypeNode);
+                    checkSourceElement(baseTypeNode.expression);
+                    if (ts.some(baseTypeNode.typeArguments)) {
+                        ts.forEach(baseTypeNode.typeArguments, checkSourceElement);
+                        for (var _i = 0, _a = getConstructorsForTypeArguments(staticBaseType, baseTypeNode.typeArguments, baseTypeNode); _i < _a.length; _i++) {
+                            var constructor = _a[_i];
+                            if (!checkTypeArgumentConstraints(baseTypeNode, constructor.typeParameters)) {
+                                break;
+                            }
+                        }
+                    }
+                    var baseWithThis = getTypeWithThisArgument(baseType_1, type.thisType);
+                    if (!checkTypeAssignableTo(typeWithThis, baseWithThis, /*errorNode*/ undefined)) {
+                        issueMemberSpecificError(node, typeWithThis, baseWithThis, ts.Diagnostics.Class_0_incorrectly_extends_base_class_1);
+                    }
+                    checkTypeAssignableTo(staticType, getTypeWithoutSignatures(staticBaseType), node.name || node, ts.Diagnostics.Class_static_side_0_incorrectly_extends_base_class_static_side_1);
+                    if (baseConstructorType.flags & 2162688 /* TypeVariable */ && !isMixinConstructorType(staticType)) {
+                        error(node.name || node, ts.Diagnostics.A_mixin_class_must_have_a_constructor_with_a_single_rest_parameter_of_type_any);
+                    }
+                    if (!(staticBaseType.symbol && staticBaseType.symbol.flags & 32 /* Class */) && !(baseConstructorType.flags & 2162688 /* TypeVariable */)) {
+                        // When the static base type is a "class-like" constructor function (but not actually a class), we verify
+                        // that all instantiated base constructor signatures return the same type. We can simply compare the type
+                        // references (as opposed to checking the structure of the types) because elsewhere we have already checked
+                        // that the base type is a class or interface type (and not, for example, an anonymous object type).
+                        var constructors = getInstantiatedConstructorsForTypeArguments(staticBaseType, baseTypeNode.typeArguments, baseTypeNode);
+                        if (ts.forEach(constructors, function (sig) { return getReturnTypeOfSignature(sig) !== baseType_1; })) {
+                            error(baseTypeNode.expression, ts.Diagnostics.Base_constructors_must_all_have_the_same_return_type);
+                        }
+                    }
+                    checkKindsOfPropertyMemberOverrides(type, baseType_1);
+                }
+            }
+            var implementedTypeNodes = ts.getClassImplementsHeritageClauseElements(node);
+            if (implementedTypeNodes) {
+                for (var _b = 0, implementedTypeNodes_1 = implementedTypeNodes; _b < implementedTypeNodes_1.length; _b++) {
+                    var typeRefNode = implementedTypeNodes_1[_b];
+                    if (!ts.isEntityNameExpression(typeRefNode.expression)) {
+                        error(typeRefNode.expression, ts.Diagnostics.A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments);
+                    }
+                    checkTypeReferenceNode(typeRefNode);
+                    if (produceDiagnostics) {
+                        var t = getTypeFromTypeNode(typeRefNode);
+                        if (t !== errorType) {
+                            if (isValidBaseType(t)) {
+                                var genericDiag = t.symbol && t.symbol.flags & 32 /* Class */ ?
+                                    ts.Diagnostics.Class_0_incorrectly_implements_class_1_Did_you_mean_to_extend_1_and_inherit_its_members_as_a_subclass :
+                                    ts.Diagnostics.Class_0_incorrectly_implements_interface_1;
+                                var baseWithThis = getTypeWithThisArgument(t, type.thisType);
+                                if (!checkTypeAssignableTo(typeWithThis, baseWithThis, /*errorNode*/ undefined)) {
+                                    issueMemberSpecificError(node, typeWithThis, baseWithThis, genericDiag);
+                                }
+                            }
+                            else {
+                                error(typeRefNode, ts.Diagnostics.A_class_may_only_implement_another_class_or_interface);
+                            }
+                        }
+                    }
+                }
+            }
+            if (produceDiagnostics) {
+                checkIndexConstraints(type);
+                checkTypeForDuplicateIndexSignatures(node);
+                checkPropertyInitialization(node);
+            }
+        }
+        function issueMemberSpecificError(node, typeWithThis, baseWithThis, broadDiag) {
+            // iterate over all implemented properties and issue errors on each one which isn't compatible, rather than the class as a whole, if possible
+            var issuedMemberError = false;
+            var _loop_9 = function (member) {
+                if (ts.hasStaticModifier(member)) {
+                    return "continue";
+                }
+                var declaredProp = member.name && getSymbolAtLocation(member.name) || getSymbolAtLocation(member);
+                if (declaredProp) {
+                    var prop = getPropertyOfType(typeWithThis, declaredProp.escapedName);
+                    var baseProp = getPropertyOfType(baseWithThis, declaredProp.escapedName);
+                    if (prop && baseProp) {
+                        var rootChain = function () { return ts.chainDiagnosticMessages(
+                        /*details*/ undefined, ts.Diagnostics.Property_0_in_type_1_is_not_assignable_to_the_same_property_in_base_type_2, symbolToString(declaredProp), typeToString(typeWithThis), typeToString(baseWithThis)); };
+                        if (!checkTypeAssignableTo(getTypeOfSymbol(prop), getTypeOfSymbol(baseProp), member.name || member, /*message*/ undefined, rootChain)) {
+                            issuedMemberError = true;
+                        }
+                    }
+                }
+            };
+            for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
+                var member = _a[_i];
+                _loop_9(member);
+            }
+            if (!issuedMemberError) {
+                // check again with diagnostics to generate a less-specific error
+                checkTypeAssignableTo(typeWithThis, baseWithThis, node.name || node, broadDiag);
+            }
+        }
+        function checkBaseTypeAccessibility(type, node) {
+            var signatures = getSignaturesOfType(type, 1 /* Construct */);
+            if (signatures.length) {
+                var declaration = signatures[0].declaration;
+                if (declaration && ts.hasModifier(declaration, 8 /* Private */)) {
+                    var typeClassDeclaration = ts.getClassLikeDeclarationOfSymbol(type.symbol);
+                    if (!isNodeWithinClass(node, typeClassDeclaration)) {
+                        error(node, ts.Diagnostics.Cannot_extend_a_class_0_Class_constructor_is_marked_as_private, getFullyQualifiedName(type.symbol));
+                    }
+                }
+            }
+        }
+        function getTargetSymbol(s) {
+            // if symbol is instantiated its flags are not copied from the 'target'
+            // so we'll need to get back original 'target' symbol to work with correct set of flags
+            return ts.getCheckFlags(s) & 1 /* Instantiated */ ? s.target : s;
+        }
+        function getClassOrInterfaceDeclarationsOfSymbol(symbol) {
+            return ts.filter(symbol.declarations, function (d) {
+                return d.kind === 235 /* ClassDeclaration */ || d.kind === 236 /* InterfaceDeclaration */;
+            });
+        }
+        function checkKindsOfPropertyMemberOverrides(type, baseType) {
+            // TypeScript 1.0 spec (April 2014): 8.2.3
+            // A derived class inherits all members from its base class it doesn't override.
+            // Inheritance means that a derived class implicitly contains all non - overridden members of the base class.
+            // Both public and private property members are inherited, but only public property members can be overridden.
+            // A property member in a derived class is said to override a property member in a base class
+            // when the derived class property member has the same name and kind(instance or static)
+            // as the base class property member.
+            // The type of an overriding property member must be assignable(section 3.8.4)
+            // to the type of the overridden property member, or otherwise a compile - time error occurs.
+            // Base class instance member functions can be overridden by derived class instance member functions,
+            // but not by other kinds of members.
+            // Base class instance member variables and accessors can be overridden by
+            // derived class instance member variables and accessors, but not by other kinds of members.
+            // NOTE: assignability is checked in checkClassDeclaration
+            var baseProperties = getPropertiesOfType(baseType);
+            for (var _i = 0, baseProperties_1 = baseProperties; _i < baseProperties_1.length; _i++) {
+                var baseProperty = baseProperties_1[_i];
+                var base = getTargetSymbol(baseProperty);
+                if (base.flags & 4194304 /* Prototype */) {
+                    continue;
+                }
+                var derived = getTargetSymbol(getPropertyOfObjectType(type, base.escapedName)); // TODO: GH#18217
+                var baseDeclarationFlags = ts.getDeclarationModifierFlagsFromSymbol(base);
+                ts.Debug.assert(!!derived, "derived should point to something, even if it is the base class' declaration.");
+                if (derived) {
+                    // In order to resolve whether the inherited method was overridden in the base class or not,
+                    // we compare the Symbols obtained. Since getTargetSymbol returns the symbol on the *uninstantiated*
+                    // type declaration, derived and base resolve to the same symbol even in the case of generic classes.
+                    if (derived === base) {
+                        // derived class inherits base without override/redeclaration
+                        var derivedClassDecl = ts.getClassLikeDeclarationOfSymbol(type.symbol);
+                        // It is an error to inherit an abstract member without implementing it or being declared abstract.
+                        // If there is no declaration for the derived class (as in the case of class expressions),
+                        // then the class cannot be declared abstract.
+                        if (baseDeclarationFlags & 128 /* Abstract */ && (!derivedClassDecl || !ts.hasModifier(derivedClassDecl, 128 /* Abstract */))) {
+                            if (derivedClassDecl.kind === 205 /* ClassExpression */) {
+                                error(derivedClassDecl, ts.Diagnostics.Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1, symbolToString(baseProperty), typeToString(baseType));
+                            }
+                            else {
+                                error(derivedClassDecl, ts.Diagnostics.Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2, typeToString(type), symbolToString(baseProperty), typeToString(baseType));
+                            }
+                        }
+                    }
+                    else {
+                        // derived overrides base.
+                        var derivedDeclarationFlags = ts.getDeclarationModifierFlagsFromSymbol(derived);
+                        if (baseDeclarationFlags & 8 /* Private */ || derivedDeclarationFlags & 8 /* Private */) {
+                            // either base or derived property is private - not override, skip it
+                            continue;
+                        }
+                        if (isPrototypeProperty(base) || base.flags & 98308 /* PropertyOrAccessor */ && derived.flags & 98308 /* PropertyOrAccessor */) {
+                            // method is overridden with method or property/accessor is overridden with property/accessor - correct case
+                            continue;
+                        }
+                        var errorMessage = void 0;
+                        if (isPrototypeProperty(base)) {
+                            if (derived.flags & 98304 /* Accessor */) {
+                                errorMessage = ts.Diagnostics.Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_accessor;
+                            }
+                            else {
+                                errorMessage = ts.Diagnostics.Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_property;
+                            }
+                        }
+                        else if (base.flags & 98304 /* Accessor */) {
+                            errorMessage = ts.Diagnostics.Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_function;
+                        }
+                        else {
+                            errorMessage = ts.Diagnostics.Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_function;
+                        }
+                        error(ts.getNameOfDeclaration(derived.valueDeclaration) || derived.valueDeclaration, errorMessage, typeToString(baseType), symbolToString(base), typeToString(type));
+                    }
+                }
+            }
+        }
+        function checkInheritedPropertiesAreIdentical(type, typeNode) {
+            var baseTypes = getBaseTypes(type);
+            if (baseTypes.length < 2) {
+                return true;
+            }
+            var seen = ts.createUnderscoreEscapedMap();
+            ts.forEach(resolveDeclaredMembers(type).declaredProperties, function (p) { seen.set(p.escapedName, { prop: p, containingType: type }); });
+            var ok = true;
+            for (var _i = 0, baseTypes_2 = baseTypes; _i < baseTypes_2.length; _i++) {
+                var base = baseTypes_2[_i];
+                var properties = getPropertiesOfType(getTypeWithThisArgument(base, type.thisType));
+                for (var _a = 0, properties_8 = properties; _a < properties_8.length; _a++) {
+                    var prop = properties_8[_a];
+                    var existing = seen.get(prop.escapedName);
+                    if (!existing) {
+                        seen.set(prop.escapedName, { prop: prop, containingType: base });
+                    }
+                    else {
+                        var isInheritedProperty = existing.containingType !== type;
+                        if (isInheritedProperty && !isPropertyIdenticalTo(existing.prop, prop)) {
+                            ok = false;
+                            var typeName1 = typeToString(existing.containingType);
+                            var typeName2 = typeToString(base);
+                            var errorInfo = ts.chainDiagnosticMessages(/*details*/ undefined, ts.Diagnostics.Named_property_0_of_types_1_and_2_are_not_identical, symbolToString(prop), typeName1, typeName2);
+                            errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Interface_0_cannot_simultaneously_extend_types_1_and_2, typeToString(type), typeName1, typeName2);
+                            diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(typeNode, errorInfo));
+                        }
+                    }
+                }
+            }
+            return ok;
+        }
+        function checkPropertyInitialization(node) {
+            if (!strictNullChecks || !strictPropertyInitialization || node.flags & 4194304 /* Ambient */) {
+                return;
+            }
+            var constructor = findConstructorDeclaration(node);
+            for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
+                var member = _a[_i];
+                if (isInstancePropertyWithoutInitializer(member)) {
+                    var propName = member.name;
+                    if (ts.isIdentifier(propName)) {
+                        var type = getTypeOfSymbol(getSymbolOfNode(member));
+                        if (!(type.flags & 3 /* AnyOrUnknown */ || getFalsyFlags(type) & 8192 /* Undefined */)) {
+                            if (!constructor || !isPropertyInitializedInConstructor(propName, type, constructor)) {
+                                error(member.name, ts.Diagnostics.Property_0_has_no_initializer_and_is_not_definitely_assigned_in_the_constructor, ts.declarationNameToString(propName));
+                            }
+                        }
+                    }
+                }
+            }
+        }
+        function isInstancePropertyWithoutInitializer(node) {
+            return node.kind === 152 /* PropertyDeclaration */ &&
+                !ts.hasModifier(node, 32 /* Static */ | 128 /* Abstract */) &&
+                !node.exclamationToken &&
+                !node.initializer;
+        }
+        function isPropertyInitializedInConstructor(propName, propType, constructor) {
+            var reference = ts.createPropertyAccess(ts.createThis(), propName);
+            reference.flowNode = constructor.returnFlowNode;
+            var flowType = getFlowTypeOfReference(reference, propType, getOptionalType(propType));
+            return !(getFalsyFlags(flowType) & 8192 /* Undefined */);
+        }
+        function checkInterfaceDeclaration(node) {
+            // Grammar checking
+            if (!checkGrammarDecoratorsAndModifiers(node))
+                checkGrammarInterfaceDeclaration(node);
+            checkTypeParameters(node.typeParameters);
+            if (produceDiagnostics) {
+                checkTypeNameIsReserved(node.name, ts.Diagnostics.Interface_name_cannot_be_0);
+                checkExportsOnMergedDeclarations(node);
+                var symbol = getSymbolOfNode(node);
+                checkTypeParameterListsIdentical(symbol);
+                // Only check this symbol once
+                var firstInterfaceDecl = ts.getDeclarationOfKind(symbol, 236 /* InterfaceDeclaration */);
+                if (node === firstInterfaceDecl) {
+                    var type = getDeclaredTypeOfSymbol(symbol);
+                    var typeWithThis = getTypeWithThisArgument(type);
+                    // run subsequent checks only if first set succeeded
+                    if (checkInheritedPropertiesAreIdentical(type, node.name)) {
+                        for (var _i = 0, _a = getBaseTypes(type); _i < _a.length; _i++) {
+                            var baseType = _a[_i];
+                            checkTypeAssignableTo(typeWithThis, getTypeWithThisArgument(baseType, type.thisType), node.name, ts.Diagnostics.Interface_0_incorrectly_extends_interface_1);
+                        }
+                        checkIndexConstraints(type);
+                    }
+                }
+                checkObjectTypeForDuplicateDeclarations(node);
+            }
+            ts.forEach(ts.getInterfaceBaseTypeNodes(node), function (heritageElement) {
+                if (!ts.isEntityNameExpression(heritageElement.expression)) {
+                    error(heritageElement.expression, ts.Diagnostics.An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments);
+                }
+                checkTypeReferenceNode(heritageElement);
+            });
+            ts.forEach(node.members, checkSourceElement);
+            if (produceDiagnostics) {
+                checkTypeForDuplicateIndexSignatures(node);
+                registerForUnusedIdentifiersCheck(node);
+            }
+        }
+        function checkTypeAliasDeclaration(node) {
+            // Grammar checking
+            checkGrammarDecoratorsAndModifiers(node);
+            checkTypeNameIsReserved(node.name, ts.Diagnostics.Type_alias_name_cannot_be_0);
+            checkTypeParameters(node.typeParameters);
+            checkSourceElement(node.type);
+            registerForUnusedIdentifiersCheck(node);
+        }
+        function computeEnumMemberValues(node) {
+            var nodeLinks = getNodeLinks(node);
+            if (!(nodeLinks.flags & 16384 /* EnumValuesComputed */)) {
+                nodeLinks.flags |= 16384 /* EnumValuesComputed */;
+                var autoValue = 0;
+                for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
+                    var member = _a[_i];
+                    var value = computeMemberValue(member, autoValue);
+                    getNodeLinks(member).enumMemberValue = value;
+                    autoValue = typeof value === "number" ? value + 1 : undefined;
+                }
+            }
+        }
+        function computeMemberValue(member, autoValue) {
+            if (isComputedNonLiteralName(member.name)) {
+                error(member.name, ts.Diagnostics.Computed_property_names_are_not_allowed_in_enums);
+            }
+            else {
+                var text = ts.getTextOfPropertyName(member.name);
+                if (isNumericLiteralName(text) && !isInfinityOrNaNString(text)) {
+                    error(member.name, ts.Diagnostics.An_enum_member_cannot_have_a_numeric_name);
+                }
+            }
+            if (member.initializer) {
+                return computeConstantValue(member);
+            }
+            // In ambient enum declarations that specify no const modifier, enum member declarations that omit
+            // a value are considered computed members (as opposed to having auto-incremented values).
+            if (member.parent.flags & 4194304 /* Ambient */ && !ts.isConst(member.parent)) {
+                return undefined;
+            }
+            // If the member declaration specifies no value, the member is considered a constant enum member.
+            // If the member is the first member in the enum declaration, it is assigned the value zero.
+            // Otherwise, it is assigned the value of the immediately preceding member plus one, and an error
+            // occurs if the immediately preceding member is not a constant enum member.
+            if (autoValue !== undefined) {
+                return autoValue;
+            }
+            error(member.name, ts.Diagnostics.Enum_member_must_have_initializer);
+            return undefined;
+        }
+        function computeConstantValue(member) {
+            var enumKind = getEnumKind(getSymbolOfNode(member.parent));
+            var isConstEnum = ts.isConst(member.parent);
+            var initializer = member.initializer;
+            var value = enumKind === 1 /* Literal */ && !isLiteralEnumMember(member) ? undefined : evaluate(initializer);
+            if (value !== undefined) {
+                if (isConstEnum && typeof value === "number" && !isFinite(value)) {
+                    error(initializer, isNaN(value) ?
+                        ts.Diagnostics.const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN :
+                        ts.Diagnostics.const_enum_member_initializer_was_evaluated_to_a_non_finite_value);
+                }
+            }
+            else if (enumKind === 1 /* Literal */) {
+                error(initializer, ts.Diagnostics.Computed_values_are_not_permitted_in_an_enum_with_string_valued_members);
+                return 0;
+            }
+            else if (isConstEnum) {
+                error(initializer, ts.Diagnostics.In_const_enum_declarations_member_initializer_must_be_constant_expression);
+            }
+            else if (member.parent.flags & 4194304 /* Ambient */) {
+                error(initializer, ts.Diagnostics.In_ambient_enum_declarations_member_initializer_must_be_constant_expression);
+            }
+            else {
+                // Only here do we need to check that the initializer is assignable to the enum type.
+                checkTypeAssignableTo(checkExpression(initializer), getDeclaredTypeOfSymbol(getSymbolOfNode(member.parent)), initializer, /*headMessage*/ undefined);
+            }
+            return value;
+            function evaluate(expr) {
+                switch (expr.kind) {
+                    case 198 /* PrefixUnaryExpression */:
+                        var value_2 = evaluate(expr.operand);
+                        if (typeof value_2 === "number") {
+                            switch (expr.operator) {
+                                case 37 /* PlusToken */: return value_2;
+                                case 38 /* MinusToken */: return -value_2;
+                                case 52 /* TildeToken */: return ~value_2;
+                            }
+                        }
+                        break;
+                    case 200 /* BinaryExpression */:
+                        var left = evaluate(expr.left);
+                        var right = evaluate(expr.right);
+                        if (typeof left === "number" && typeof right === "number") {
+                            switch (expr.operatorToken.kind) {
+                                case 49 /* BarToken */: return left | right;
+                                case 48 /* AmpersandToken */: return left & right;
+                                case 46 /* GreaterThanGreaterThanToken */: return left >> right;
+                                case 47 /* GreaterThanGreaterThanGreaterThanToken */: return left >>> right;
+                                case 45 /* LessThanLessThanToken */: return left << right;
+                                case 50 /* CaretToken */: return left ^ right;
+                                case 39 /* AsteriskToken */: return left * right;
+                                case 41 /* SlashToken */: return left / right;
+                                case 37 /* PlusToken */: return left + right;
+                                case 38 /* MinusToken */: return left - right;
+                                case 42 /* PercentToken */: return left % right;
+                                case 40 /* AsteriskAsteriskToken */: return Math.pow(left, right);
+                            }
+                        }
+                        else if (typeof left === "string" && typeof right === "string" && expr.operatorToken.kind === 37 /* PlusToken */) {
+                            return left + right;
+                        }
+                        break;
+                    case 9 /* StringLiteral */:
+                        return expr.text;
+                    case 8 /* NumericLiteral */:
+                        checkGrammarNumericLiteral(expr);
+                        return +expr.text;
+                    case 191 /* ParenthesizedExpression */:
+                        return evaluate(expr.expression);
+                    case 71 /* Identifier */:
+                        var identifier = expr;
+                        if (isInfinityOrNaNString(identifier.escapedText)) {
+                            return +(identifier.escapedText);
+                        }
+                        return ts.nodeIsMissing(expr) ? 0 : evaluateEnumMember(expr, getSymbolOfNode(member.parent), identifier.escapedText);
+                    case 186 /* ElementAccessExpression */:
+                    case 185 /* PropertyAccessExpression */:
+                        var ex = expr;
+                        if (isConstantMemberAccess(ex)) {
+                            var type = getTypeOfExpression(ex.expression);
+                            if (type.symbol && type.symbol.flags & 384 /* Enum */) {
+                                var name = void 0;
+                                if (ex.kind === 185 /* PropertyAccessExpression */) {
+                                    name = ex.name.escapedText;
+                                }
+                                else {
+                                    var argument = ex.argumentExpression;
+                                    ts.Debug.assert(ts.isLiteralExpression(argument));
+                                    name = ts.escapeLeadingUnderscores(argument.text);
+                                }
+                                return evaluateEnumMember(expr, type.symbol, name);
+                            }
+                        }
+                        break;
+                }
+                return undefined;
+            }
+            function evaluateEnumMember(expr, enumSymbol, name) {
+                var memberSymbol = enumSymbol.exports.get(name);
+                if (memberSymbol) {
+                    var declaration = memberSymbol.valueDeclaration;
+                    if (declaration !== member) {
+                        if (isBlockScopedNameDeclaredBeforeUse(declaration, member)) {
+                            return getEnumMemberValue(declaration);
+                        }
+                        error(expr, ts.Diagnostics.A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums);
+                        return 0;
+                    }
+                }
+                return undefined;
+            }
+        }
+        function isConstantMemberAccess(node) {
+            return node.kind === 71 /* Identifier */ ||
+                node.kind === 185 /* PropertyAccessExpression */ && isConstantMemberAccess(node.expression) ||
+                node.kind === 186 /* ElementAccessExpression */ && isConstantMemberAccess(node.expression) &&
+                    node.argumentExpression.kind === 9 /* StringLiteral */;
+        }
+        function checkEnumDeclaration(node) {
+            if (!produceDiagnostics) {
+                return;
+            }
+            // Grammar checking
+            checkGrammarDecoratorsAndModifiers(node);
+            checkTypeNameIsReserved(node.name, ts.Diagnostics.Enum_name_cannot_be_0);
+            checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+            checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+            checkExportsOnMergedDeclarations(node);
+            computeEnumMemberValues(node);
+            var enumIsConst = ts.isConst(node);
+            if (compilerOptions.isolatedModules && enumIsConst && node.flags & 4194304 /* Ambient */) {
+                error(node.name, ts.Diagnostics.Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided);
+            }
+            // Spec 2014 - Section 9.3:
+            // It isn't possible for one enum declaration to continue the automatic numbering sequence of another,
+            // and when an enum type has multiple declarations, only one declaration is permitted to omit a value
+            // for the first member.
+            //
+            // Only perform this check once per symbol
+            var enumSymbol = getSymbolOfNode(node);
+            var firstDeclaration = ts.getDeclarationOfKind(enumSymbol, node.kind);
+            if (node === firstDeclaration) {
+                if (enumSymbol.declarations.length > 1) {
+                    // check that const is placed\omitted on all enum declarations
+                    ts.forEach(enumSymbol.declarations, function (decl) {
+                        if (ts.isConstEnumDeclaration(decl) !== enumIsConst) {
+                            error(ts.getNameOfDeclaration(decl), ts.Diagnostics.Enum_declarations_must_all_be_const_or_non_const);
+                        }
+                    });
+                }
+                var seenEnumMissingInitialInitializer_1 = false;
+                ts.forEach(enumSymbol.declarations, function (declaration) {
+                    // return true if we hit a violation of the rule, false otherwise
+                    if (declaration.kind !== 238 /* EnumDeclaration */) {
+                        return false;
+                    }
+                    var enumDeclaration = declaration;
+                    if (!enumDeclaration.members.length) {
+                        return false;
+                    }
+                    var firstEnumMember = enumDeclaration.members[0];
+                    if (!firstEnumMember.initializer) {
+                        if (seenEnumMissingInitialInitializer_1) {
+                            error(firstEnumMember.name, ts.Diagnostics.In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enum_element);
+                        }
+                        else {
+                            seenEnumMissingInitialInitializer_1 = true;
+                        }
+                    }
+                });
+            }
+        }
+        function getFirstNonAmbientClassOrFunctionDeclaration(symbol) {
+            var declarations = symbol.declarations;
+            for (var _i = 0, declarations_8 = declarations; _i < declarations_8.length; _i++) {
+                var declaration = declarations_8[_i];
+                if ((declaration.kind === 235 /* ClassDeclaration */ ||
+                    (declaration.kind === 234 /* FunctionDeclaration */ && ts.nodeIsPresent(declaration.body))) &&
+                    !(declaration.flags & 4194304 /* Ambient */)) {
+                    return declaration;
+                }
+            }
+            return undefined;
+        }
+        function inSameLexicalScope(node1, node2) {
+            var container1 = ts.getEnclosingBlockScopeContainer(node1);
+            var container2 = ts.getEnclosingBlockScopeContainer(node2);
+            if (isGlobalSourceFile(container1)) {
+                return isGlobalSourceFile(container2);
+            }
+            else if (isGlobalSourceFile(container2)) {
+                return false;
+            }
+            else {
+                return container1 === container2;
+            }
+        }
+        function checkModuleDeclaration(node) {
+            if (produceDiagnostics) {
+                // Grammar checking
+                var isGlobalAugmentation = ts.isGlobalScopeAugmentation(node);
+                var inAmbientContext = node.flags & 4194304 /* Ambient */;
+                if (isGlobalAugmentation && !inAmbientContext) {
+                    error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambient_context);
+                }
+                var isAmbientExternalModule = ts.isAmbientModule(node);
+                var contextErrorMessage = isAmbientExternalModule
+                    ? ts.Diagnostics.An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file
+                    : ts.Diagnostics.A_namespace_declaration_is_only_allowed_in_a_namespace_or_module;
+                if (checkGrammarModuleElementContext(node, contextErrorMessage)) {
+                    // If we hit a module declaration in an illegal context, just bail out to avoid cascading errors.
+                    return;
+                }
+                if (!checkGrammarDecoratorsAndModifiers(node)) {
+                    if (!inAmbientContext && node.name.kind === 9 /* StringLiteral */) {
+                        grammarErrorOnNode(node.name, ts.Diagnostics.Only_ambient_modules_can_use_quoted_names);
+                    }
+                }
+                if (ts.isIdentifier(node.name)) {
+                    checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+                    checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+                }
+                checkExportsOnMergedDeclarations(node);
+                var symbol = getSymbolOfNode(node);
+                // The following checks only apply on a non-ambient instantiated module declaration.
+                if (symbol.flags & 512 /* ValueModule */
+                    && symbol.declarations.length > 1
+                    && !inAmbientContext
+                    && isInstantiatedModule(node, !!compilerOptions.preserveConstEnums || !!compilerOptions.isolatedModules)) {
+                    var firstNonAmbientClassOrFunc = getFirstNonAmbientClassOrFunctionDeclaration(symbol);
+                    if (firstNonAmbientClassOrFunc) {
+                        if (ts.getSourceFileOfNode(node) !== ts.getSourceFileOfNode(firstNonAmbientClassOrFunc)) {
+                            error(node.name, ts.Diagnostics.A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merged);
+                        }
+                        else if (node.pos < firstNonAmbientClassOrFunc.pos) {
+                            error(node.name, ts.Diagnostics.A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged);
+                        }
+                    }
+                    // if the module merges with a class declaration in the same lexical scope,
+                    // we need to track this to ensure the correct emit.
+                    var mergedClass = ts.getDeclarationOfKind(symbol, 235 /* ClassDeclaration */);
+                    if (mergedClass &&
+                        inSameLexicalScope(node, mergedClass)) {
+                        getNodeLinks(node).flags |= 32768 /* LexicalModuleMergesWithClass */;
+                    }
+                }
+                if (isAmbientExternalModule) {
+                    if (ts.isExternalModuleAugmentation(node)) {
+                        // body of the augmentation should be checked for consistency only if augmentation was applied to its target (either global scope or module)
+                        // otherwise we'll be swamped in cascading errors.
+                        // We can detect if augmentation was applied using following rules:
+                        // - augmentation for a global scope is always applied
+                        // - augmentation for some external module is applied if symbol for augmentation is merged (it was combined with target module).
+                        var checkBody = isGlobalAugmentation || (getSymbolOfNode(node).flags & 33554432 /* Transient */);
+                        if (checkBody && node.body) {
+                            for (var _i = 0, _a = node.body.statements; _i < _a.length; _i++) {
+                                var statement = _a[_i];
+                                checkModuleAugmentationElement(statement, isGlobalAugmentation);
+                            }
+                        }
+                    }
+                    else if (isGlobalSourceFile(node.parent)) {
+                        if (isGlobalAugmentation) {
+                            error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations);
+                        }
+                        else if (ts.isExternalModuleNameRelative(ts.getTextOfIdentifierOrLiteral(node.name))) {
+                            error(node.name, ts.Diagnostics.Ambient_module_declaration_cannot_specify_relative_module_name);
+                        }
+                    }
+                    else {
+                        if (isGlobalAugmentation) {
+                            error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations);
+                        }
+                        else {
+                            // Node is not an augmentation and is not located on the script level.
+                            // This means that this is declaration of ambient module that is located in other module or namespace which is prohibited.
+                            error(node.name, ts.Diagnostics.Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces);
+                        }
+                    }
+                }
+            }
+            if (node.body) {
+                checkSourceElement(node.body);
+                if (!ts.isGlobalScopeAugmentation(node)) {
+                    registerForUnusedIdentifiersCheck(node);
+                }
+            }
+        }
+        function checkModuleAugmentationElement(node, isGlobalAugmentation) {
+            switch (node.kind) {
+                case 214 /* VariableStatement */:
+                    // error each individual name in variable statement instead of marking the entire variable statement
+                    for (var _i = 0, _a = node.declarationList.declarations; _i < _a.length; _i++) {
+                        var decl = _a[_i];
+                        checkModuleAugmentationElement(decl, isGlobalAugmentation);
+                    }
+                    break;
+                case 249 /* ExportAssignment */:
+                case 250 /* ExportDeclaration */:
+                    grammarErrorOnFirstToken(node, ts.Diagnostics.Exports_and_export_assignments_are_not_permitted_in_module_augmentations);
+                    break;
+                case 243 /* ImportEqualsDeclaration */:
+                case 244 /* ImportDeclaration */:
+                    grammarErrorOnFirstToken(node, ts.Diagnostics.Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_module);
+                    break;
+                case 182 /* BindingElement */:
+                case 232 /* VariableDeclaration */:
+                    var name = node.name;
+                    if (ts.isBindingPattern(name)) {
+                        for (var _b = 0, _c = name.elements; _b < _c.length; _b++) {
+                            var el = _c[_b];
+                            // mark individual names in binding pattern
+                            checkModuleAugmentationElement(el, isGlobalAugmentation);
+                        }
+                        break;
+                    }
+                // falls through
+                case 235 /* ClassDeclaration */:
+                case 238 /* EnumDeclaration */:
+                case 234 /* FunctionDeclaration */:
+                case 236 /* InterfaceDeclaration */:
+                case 239 /* ModuleDeclaration */:
+                case 237 /* TypeAliasDeclaration */:
+                    if (isGlobalAugmentation) {
+                        return;
+                    }
+                    var symbol = getSymbolOfNode(node);
+                    if (symbol) {
+                        // module augmentations cannot introduce new names on the top level scope of the module
+                        // this is done it two steps
+                        // 1. quick check - if symbol for node is not merged - this is local symbol to this augmentation - report error
+                        // 2. main check - report error if value declaration of the parent symbol is module augmentation)
+                        var reportError = !(symbol.flags & 33554432 /* Transient */);
+                        if (!reportError) {
+                            // symbol should not originate in augmentation
+                            reportError = ts.isExternalModuleAugmentation(symbol.parent.declarations[0]);
+                        }
+                    }
+                    break;
+            }
+        }
+        function getFirstIdentifier(node) {
+            switch (node.kind) {
+                case 71 /* Identifier */:
+                    return node;
+                case 146 /* QualifiedName */:
+                    do {
+                        node = node.left;
+                    } while (node.kind !== 71 /* Identifier */);
+                    return node;
+                case 185 /* PropertyAccessExpression */:
+                    do {
+                        node = node.expression;
+                    } while (node.kind !== 71 /* Identifier */);
+                    return node;
+            }
+        }
+        function checkExternalImportOrExportDeclaration(node) {
+            var moduleName = ts.getExternalModuleName(node);
+            if (!moduleName || ts.nodeIsMissing(moduleName)) {
+                // Should be a parse error.
+                return false;
+            }
+            if (!ts.isStringLiteral(moduleName)) {
+                error(moduleName, ts.Diagnostics.String_literal_expected);
+                return false;
+            }
+            var inAmbientExternalModule = node.parent.kind === 240 /* ModuleBlock */ && ts.isAmbientModule(node.parent.parent);
+            if (node.parent.kind !== 274 /* SourceFile */ && !inAmbientExternalModule) {
+                error(moduleName, node.kind === 250 /* ExportDeclaration */ ?
+                    ts.Diagnostics.Export_declarations_are_not_permitted_in_a_namespace :
+                    ts.Diagnostics.Import_declarations_in_a_namespace_cannot_reference_a_module);
+                return false;
+            }
+            if (inAmbientExternalModule && ts.isExternalModuleNameRelative(moduleName.text)) {
+                // we have already reported errors on top level imports\exports in external module augmentations in checkModuleDeclaration
+                // no need to do this again.
+                if (!isTopLevelInExternalModuleAugmentation(node)) {
+                    // TypeScript 1.0 spec (April 2013): 12.1.6
+                    // An ExternalImportDeclaration in an AmbientExternalModuleDeclaration may reference
+                    // other external modules only through top - level external module names.
+                    // Relative external module names are not permitted.
+                    error(node, ts.Diagnostics.Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relative_module_name);
+                    return false;
+                }
+            }
+            return true;
+        }
+        function checkAliasSymbol(node) {
+            var symbol = getSymbolOfNode(node);
+            var target = resolveAlias(symbol);
+            if (target !== unknownSymbol) {
+                // For external modules symbol represent local symbol for an alias.
+                // This local symbol will merge any other local declarations (excluding other aliases)
+                // and symbol.flags will contains combined representation for all merged declaration.
+                // Based on symbol.flags we can compute a set of excluded meanings (meaning that resolved alias should not have,
+                // otherwise it will conflict with some local declaration). Note that in addition to normal flags we include matching SymbolFlags.Export*
+                // in order to prevent collisions with declarations that were exported from the current module (they still contribute to local names).
+                var excludedMeanings = (symbol.flags & (67216319 /* Value */ | 1048576 /* ExportValue */) ? 67216319 /* Value */ : 0) |
+                    (symbol.flags & 67901928 /* Type */ ? 67901928 /* Type */ : 0) |
+                    (symbol.flags & 1920 /* Namespace */ ? 1920 /* Namespace */ : 0);
+                if (target.flags & excludedMeanings) {
+                    var message = node.kind === 252 /* ExportSpecifier */ ?
+                        ts.Diagnostics.Export_declaration_conflicts_with_exported_declaration_of_0 :
+                        ts.Diagnostics.Import_declaration_conflicts_with_local_declaration_of_0;
+                    error(node, message, symbolToString(symbol));
+                }
+                // Don't allow to re-export something with no value side when `--isolatedModules` is set.
+                if (compilerOptions.isolatedModules
+                    && node.kind === 252 /* ExportSpecifier */
+                    && !(target.flags & 67216319 /* Value */)
+                    && !(node.flags & 4194304 /* Ambient */)) {
+                    error(node, ts.Diagnostics.Cannot_re_export_a_type_when_the_isolatedModules_flag_is_provided);
+                }
+            }
+        }
+        function checkImportBinding(node) {
+            checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+            checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+            checkAliasSymbol(node);
+        }
+        function checkImportDeclaration(node) {
+            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_import_declaration_can_only_be_used_in_a_namespace_or_module)) {
+                // If we hit an import declaration in an illegal context, just bail out to avoid cascading errors.
+                return;
+            }
+            if (!checkGrammarDecoratorsAndModifiers(node) && ts.hasModifiers(node)) {
+                grammarErrorOnFirstToken(node, ts.Diagnostics.An_import_declaration_cannot_have_modifiers);
+            }
+            if (checkExternalImportOrExportDeclaration(node)) {
+                var importClause = node.importClause;
+                if (importClause) {
+                    if (importClause.name) {
+                        checkImportBinding(importClause);
+                    }
+                    if (importClause.namedBindings) {
+                        if (importClause.namedBindings.kind === 246 /* NamespaceImport */) {
+                            checkImportBinding(importClause.namedBindings);
+                        }
+                        else {
+                            var moduleExisted = resolveExternalModuleName(node, node.moduleSpecifier);
+                            if (moduleExisted) {
+                                ts.forEach(importClause.namedBindings.elements, checkImportBinding);
+                            }
+                        }
+                    }
+                }
+            }
+        }
+        function checkImportEqualsDeclaration(node) {
+            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_import_declaration_can_only_be_used_in_a_namespace_or_module)) {
+                // If we hit an import declaration in an illegal context, just bail out to avoid cascading errors.
+                return;
+            }
+            checkGrammarDecoratorsAndModifiers(node);
+            if (ts.isInternalModuleImportEqualsDeclaration(node) || checkExternalImportOrExportDeclaration(node)) {
+                checkImportBinding(node);
+                if (ts.hasModifier(node, 1 /* Export */)) {
+                    markExportAsReferenced(node);
+                }
+                if (node.moduleReference.kind !== 254 /* ExternalModuleReference */) {
+                    var target = resolveAlias(getSymbolOfNode(node));
+                    if (target !== unknownSymbol) {
+                        if (target.flags & 67216319 /* Value */) {
+                            // Target is a value symbol, check that it is not hidden by a local declaration with the same name
+                            var moduleName = getFirstIdentifier(node.moduleReference);
+                            if (!(resolveEntityName(moduleName, 67216319 /* Value */ | 1920 /* Namespace */).flags & 1920 /* Namespace */)) {
+                                error(moduleName, ts.Diagnostics.Module_0_is_hidden_by_a_local_declaration_with_the_same_name, ts.declarationNameToString(moduleName));
+                            }
+                        }
+                        if (target.flags & 67901928 /* Type */) {
+                            checkTypeNameIsReserved(node.name, ts.Diagnostics.Import_name_cannot_be_0);
+                        }
+                    }
+                }
+                else {
+                    if (moduleKind >= ts.ModuleKind.ES2015 && !(node.flags & 4194304 /* Ambient */)) {
+                        // Import equals declaration is deprecated in es6 or above
+                        grammarErrorOnNode(node, ts.Diagnostics.Import_assignment_cannot_be_used_when_targeting_ECMAScript_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead);
+                    }
+                }
+            }
+        }
+        function checkExportDeclaration(node) {
+            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_export_declaration_can_only_be_used_in_a_module)) {
+                // If we hit an export in an illegal context, just bail out to avoid cascading errors.
+                return;
+            }
+            if (!checkGrammarDecoratorsAndModifiers(node) && ts.hasModifiers(node)) {
+                grammarErrorOnFirstToken(node, ts.Diagnostics.An_export_declaration_cannot_have_modifiers);
+            }
+            if (!node.moduleSpecifier || checkExternalImportOrExportDeclaration(node)) {
+                if (node.exportClause) {
+                    // export { x, y }
+                    // export { x, y } from "foo"
+                    ts.forEach(node.exportClause.elements, checkExportSpecifier);
+                    var inAmbientExternalModule = node.parent.kind === 240 /* ModuleBlock */ && ts.isAmbientModule(node.parent.parent);
+                    var inAmbientNamespaceDeclaration = !inAmbientExternalModule && node.parent.kind === 240 /* ModuleBlock */ &&
+                        !node.moduleSpecifier && node.flags & 4194304 /* Ambient */;
+                    if (node.parent.kind !== 274 /* SourceFile */ && !inAmbientExternalModule && !inAmbientNamespaceDeclaration) {
+                        error(node, ts.Diagnostics.Export_declarations_are_not_permitted_in_a_namespace);
+                    }
+                }
+                else {
+                    // export * from "foo"
+                    var moduleSymbol_2 = resolveExternalModuleName(node, node.moduleSpecifier);
+                    if (moduleSymbol_2 && hasExportAssignmentSymbol(moduleSymbol_2)) {
+                        error(node.moduleSpecifier, ts.Diagnostics.Module_0_uses_export_and_cannot_be_used_with_export_Asterisk, symbolToString(moduleSymbol_2));
+                    }
+                    if (moduleKind !== ts.ModuleKind.System && moduleKind !== ts.ModuleKind.ES2015 && moduleKind !== ts.ModuleKind.ESNext) {
+                        checkExternalEmitHelpers(node, 32768 /* ExportStar */);
+                    }
+                }
+            }
+        }
+        function checkGrammarModuleElementContext(node, errorMessage) {
+            var isInAppropriateContext = node.parent.kind === 274 /* SourceFile */ || node.parent.kind === 240 /* ModuleBlock */ || node.parent.kind === 239 /* ModuleDeclaration */;
+            if (!isInAppropriateContext) {
+                grammarErrorOnFirstToken(node, errorMessage);
+            }
+            return !isInAppropriateContext;
+        }
+        function checkExportSpecifier(node) {
+            checkAliasSymbol(node);
+            if (compilerOptions.declaration) {
+                collectLinkedAliases(node.propertyName || node.name, /*setVisibility*/ true);
+            }
+            if (!node.parent.parent.moduleSpecifier) {
+                var exportedName = node.propertyName || node.name;
+                // find immediate value referenced by exported name (SymbolFlags.Alias is set so we don't chase down aliases)
+                var symbol = resolveName(exportedName, exportedName.escapedText, 67216319 /* Value */ | 67901928 /* Type */ | 1920 /* Namespace */ | 2097152 /* Alias */, 
+                /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined, /*isUse*/ true);
+                if (symbol && (symbol === undefinedSymbol || isGlobalSourceFile(getDeclarationContainer(symbol.declarations[0])))) {
+                    error(exportedName, ts.Diagnostics.Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module, ts.idText(exportedName));
+                }
+                else {
+                    markExportAsReferenced(node);
+                }
+            }
+        }
+        function checkExportAssignment(node) {
+            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_export_assignment_can_only_be_used_in_a_module)) {
+                // If we hit an export assignment in an illegal context, just bail out to avoid cascading errors.
+                return;
+            }
+            var container = node.parent.kind === 274 /* SourceFile */ ? node.parent : node.parent.parent;
+            if (container.kind === 239 /* ModuleDeclaration */ && !ts.isAmbientModule(container)) {
+                if (node.isExportEquals) {
+                    error(node, ts.Diagnostics.An_export_assignment_cannot_be_used_in_a_namespace);
+                }
+                else {
+                    error(node, ts.Diagnostics.A_default_export_can_only_be_used_in_an_ECMAScript_style_module);
+                }
+                return;
+            }
+            // Grammar checking
+            if (!checkGrammarDecoratorsAndModifiers(node) && ts.hasModifiers(node)) {
+                grammarErrorOnFirstToken(node, ts.Diagnostics.An_export_assignment_cannot_have_modifiers);
+            }
+            if (node.expression.kind === 71 /* Identifier */) {
+                markExportAsReferenced(node);
+                if (compilerOptions.declaration) {
+                    collectLinkedAliases(node.expression, /*setVisibility*/ true);
+                }
+            }
+            else {
+                checkExpressionCached(node.expression);
+            }
+            checkExternalModuleExports(container);
+            if ((node.flags & 4194304 /* Ambient */) && !ts.isEntityNameExpression(node.expression)) {
+                grammarErrorOnNode(node.expression, ts.Diagnostics.The_expression_of_an_export_assignment_must_be_an_identifier_or_qualified_name_in_an_ambient_context);
+            }
+            if (node.isExportEquals && !(node.flags & 4194304 /* Ambient */)) {
+                if (moduleKind >= ts.ModuleKind.ES2015) {
+                    // export assignment is not supported in es6 modules
+                    grammarErrorOnNode(node, ts.Diagnostics.Export_assignment_cannot_be_used_when_targeting_ECMAScript_modules_Consider_using_export_default_or_another_module_format_instead);
+                }
+                else if (moduleKind === ts.ModuleKind.System) {
+                    // system modules does not support export assignment
+                    grammarErrorOnNode(node, ts.Diagnostics.Export_assignment_is_not_supported_when_module_flag_is_system);
+                }
+            }
+        }
+        function hasExportedMembers(moduleSymbol) {
+            return ts.forEachEntry(moduleSymbol.exports, function (_, id) { return id !== "export="; });
+        }
+        function checkExternalModuleExports(node) {
+            var moduleSymbol = getSymbolOfNode(node);
+            var links = getSymbolLinks(moduleSymbol);
+            if (!links.exportsChecked) {
+                var exportEqualsSymbol = moduleSymbol.exports.get("export=");
+                if (exportEqualsSymbol && hasExportedMembers(moduleSymbol)) {
+                    var declaration = getDeclarationOfAliasSymbol(exportEqualsSymbol) || exportEqualsSymbol.valueDeclaration;
+                    if (!isTopLevelInExternalModuleAugmentation(declaration) && !ts.isInJavaScriptFile(declaration)) {
+                        error(declaration, ts.Diagnostics.An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements);
+                    }
+                }
+                // Checks for export * conflicts
+                var exports_1 = getExportsOfModule(moduleSymbol);
+                if (exports_1) {
+                    exports_1.forEach(function (_a, id) {
+                        var declarations = _a.declarations, flags = _a.flags;
+                        if (id === "__export") {
+                            return;
+                        }
+                        // ECMA262: 15.2.1.1 It is a Syntax Error if the ExportedNames of ModuleItemList contains any duplicate entries.
+                        // (TS Exceptions: namespaces, function overloads, enums, and interfaces)
+                        if (flags & (1920 /* Namespace */ | 64 /* Interface */ | 384 /* Enum */)) {
+                            return;
+                        }
+                        var exportedDeclarationsCount = ts.countWhere(declarations, isNotOverloadAndNotAccessor);
+                        if (flags & 524288 /* TypeAlias */ && exportedDeclarationsCount <= 2) {
+                            // it is legal to merge type alias with other values
+                            // so count should be either 1 (just type alias) or 2 (type alias + merged value)
+                            return;
+                        }
+                        if (exportedDeclarationsCount > 1) {
+                            for (var _i = 0, declarations_9 = declarations; _i < declarations_9.length; _i++) {
+                                var declaration = declarations_9[_i];
+                                if (isNotOverload(declaration)) {
+                                    diagnostics.add(ts.createDiagnosticForNode(declaration, ts.Diagnostics.Cannot_redeclare_exported_variable_0, ts.unescapeLeadingUnderscores(id)));
+                                }
+                            }
+                        }
+                    });
+                }
+                links.exportsChecked = true;
+            }
+        }
+        function isNotAccessor(declaration) {
+            // Accessors check for their own matching duplicates, and in contexts where they are valid, there are already duplicate identifier checks
+            return !ts.isAccessor(declaration);
+        }
+        function isNotOverload(declaration) {
+            return (declaration.kind !== 234 /* FunctionDeclaration */ && declaration.kind !== 154 /* MethodDeclaration */) ||
+                !!declaration.body;
+        }
+        function checkSourceElement(node) {
+            if (!node) {
+                return;
+            }
+            if (ts.isInJavaScriptFile(node)) {
+                ts.forEach(node.jsDoc, function (_a) {
+                    var tags = _a.tags;
+                    return ts.forEach(tags, checkSourceElement);
+                });
+            }
+            var kind = node.kind;
+            if (cancellationToken) {
+                // Only bother checking on a few construct kinds.  We don't want to be excessively
+                // hitting the cancellation token on every node we check.
+                switch (kind) {
+                    case 239 /* ModuleDeclaration */:
+                    case 235 /* ClassDeclaration */:
+                    case 236 /* InterfaceDeclaration */:
+                    case 234 /* FunctionDeclaration */:
+                        cancellationToken.throwIfCancellationRequested();
+                }
+            }
+            switch (kind) {
+                case 148 /* TypeParameter */:
+                    return checkTypeParameter(node);
+                case 149 /* Parameter */:
+                    return checkParameter(node);
+                case 152 /* PropertyDeclaration */:
+                case 151 /* PropertySignature */:
+                    return checkPropertyDeclaration(node);
+                case 163 /* FunctionType */:
+                case 164 /* ConstructorType */:
+                case 158 /* CallSignature */:
+                case 159 /* ConstructSignature */:
+                case 160 /* IndexSignature */:
+                    return checkSignatureDeclaration(node);
+                case 154 /* MethodDeclaration */:
+                case 153 /* MethodSignature */:
+                    return checkMethodDeclaration(node);
+                case 155 /* Constructor */:
+                    return checkConstructorDeclaration(node);
+                case 156 /* GetAccessor */:
+                case 157 /* SetAccessor */:
+                    return checkAccessorDeclaration(node);
+                case 162 /* TypeReference */:
+                    return checkTypeReferenceNode(node);
+                case 161 /* TypePredicate */:
+                    return checkTypePredicate(node);
+                case 165 /* TypeQuery */:
+                    return checkTypeQuery(node);
+                case 166 /* TypeLiteral */:
+                    return checkTypeLiteral(node);
+                case 167 /* ArrayType */:
+                    return checkArrayType(node);
+                case 168 /* TupleType */:
+                    return checkTupleType(node);
+                case 169 /* UnionType */:
+                case 170 /* IntersectionType */:
+                    return checkUnionOrIntersectionType(node);
+                case 173 /* ParenthesizedType */:
+                    return checkSourceElement(node.type);
+                case 175 /* TypeOperator */:
+                    return checkTypeOperator(node);
+                case 171 /* ConditionalType */:
+                    return checkConditionalType(node);
+                case 172 /* InferType */:
+                    return checkInferType(node);
+                case 179 /* ImportType */:
+                    return checkImportType(node);
+                case 290 /* JSDocAugmentsTag */:
+                    return checkJSDocAugmentsTag(node);
+                case 297 /* JSDocTypedefTag */:
+                case 292 /* JSDocCallbackTag */:
+                    return checkJSDocTypeAliasTag(node);
+                case 293 /* JSDocParameterTag */:
+                    return checkJSDocParameterTag(node);
+                case 284 /* JSDocFunctionType */:
+                    checkSignatureDeclaration(node);
+                // falls through
+                case 282 /* JSDocNonNullableType */:
+                case 281 /* JSDocNullableType */:
+                case 279 /* JSDocAllType */:
+                case 280 /* JSDocUnknownType */:
+                case 287 /* JSDocTypeLiteral */:
+                    checkJSDocTypeIsInJsFile(node);
+                    ts.forEachChild(node, checkSourceElement);
+                    return;
+                case 285 /* JSDocVariadicType */:
+                    checkJSDocVariadicType(node);
+                    return;
+                case 278 /* JSDocTypeExpression */:
+                    return checkSourceElement(node.type);
+                case 176 /* IndexedAccessType */:
+                    return checkIndexedAccessType(node);
+                case 177 /* MappedType */:
+                    return checkMappedType(node);
+                case 234 /* FunctionDeclaration */:
+                    return checkFunctionDeclaration(node);
+                case 213 /* Block */:
+                case 240 /* ModuleBlock */:
+                    return checkBlock(node);
+                case 214 /* VariableStatement */:
+                    return checkVariableStatement(node);
+                case 216 /* ExpressionStatement */:
+                    return checkExpressionStatement(node);
+                case 217 /* IfStatement */:
+                    return checkIfStatement(node);
+                case 218 /* DoStatement */:
+                    return checkDoStatement(node);
+                case 219 /* WhileStatement */:
+                    return checkWhileStatement(node);
+                case 220 /* ForStatement */:
+                    return checkForStatement(node);
+                case 221 /* ForInStatement */:
+                    return checkForInStatement(node);
+                case 222 /* ForOfStatement */:
+                    return checkForOfStatement(node);
+                case 223 /* ContinueStatement */:
+                case 224 /* BreakStatement */:
+                    return checkBreakOrContinueStatement(node);
+                case 225 /* ReturnStatement */:
+                    return checkReturnStatement(node);
+                case 226 /* WithStatement */:
+                    return checkWithStatement(node);
+                case 227 /* SwitchStatement */:
+                    return checkSwitchStatement(node);
+                case 228 /* LabeledStatement */:
+                    return checkLabeledStatement(node);
+                case 229 /* ThrowStatement */:
+                    return checkThrowStatement(node);
+                case 230 /* TryStatement */:
+                    return checkTryStatement(node);
+                case 232 /* VariableDeclaration */:
+                    return checkVariableDeclaration(node);
+                case 182 /* BindingElement */:
+                    return checkBindingElement(node);
+                case 235 /* ClassDeclaration */:
+                    return checkClassDeclaration(node);
+                case 236 /* InterfaceDeclaration */:
+                    return checkInterfaceDeclaration(node);
+                case 237 /* TypeAliasDeclaration */:
+                    return checkTypeAliasDeclaration(node);
+                case 238 /* EnumDeclaration */:
+                    return checkEnumDeclaration(node);
+                case 239 /* ModuleDeclaration */:
+                    return checkModuleDeclaration(node);
+                case 244 /* ImportDeclaration */:
+                    return checkImportDeclaration(node);
+                case 243 /* ImportEqualsDeclaration */:
+                    return checkImportEqualsDeclaration(node);
+                case 250 /* ExportDeclaration */:
+                    return checkExportDeclaration(node);
+                case 249 /* ExportAssignment */:
+                    return checkExportAssignment(node);
+                case 215 /* EmptyStatement */:
+                case 231 /* DebuggerStatement */:
+                    checkGrammarStatementInAmbientContext(node);
+                    return;
+                case 253 /* MissingDeclaration */:
+                    return checkMissingDeclaration(node);
+            }
+        }
+        function checkJSDocTypeIsInJsFile(node) {
+            if (!ts.isInJavaScriptFile(node)) {
+                grammarErrorOnNode(node, ts.Diagnostics.JSDoc_types_can_only_be_used_inside_documentation_comments);
+            }
+        }
+        function checkJSDocVariadicType(node) {
+            checkJSDocTypeIsInJsFile(node);
+            checkSourceElement(node.type);
+            // Only legal location is in the *last* parameter tag or last parameter of a JSDoc function.
+            var parent = node.parent;
+            if (ts.isParameter(parent) && ts.isJSDocFunctionType(parent.parent)) {
+                if (ts.last(parent.parent.parameters) !== parent) {
+                    error(node, ts.Diagnostics.A_rest_parameter_must_be_last_in_a_parameter_list);
+                }
+                return;
+            }
+            if (!ts.isJSDocTypeExpression(parent)) {
+                error(node, ts.Diagnostics.JSDoc_may_only_appear_in_the_last_parameter_of_a_signature);
+            }
+            var paramTag = node.parent.parent;
+            if (!ts.isJSDocParameterTag(paramTag)) {
+                error(node, ts.Diagnostics.JSDoc_may_only_appear_in_the_last_parameter_of_a_signature);
+                return;
+            }
+            var param = ts.getParameterSymbolFromJSDoc(paramTag);
+            if (!param) {
+                // We will error in `checkJSDocParameterTag`.
+                return;
+            }
+            var host = ts.getHostSignatureFromJSDoc(paramTag);
+            if (!host || ts.last(host.parameters).symbol !== param) {
+                error(node, ts.Diagnostics.A_rest_parameter_must_be_last_in_a_parameter_list);
+            }
+        }
+        function getTypeFromJSDocVariadicType(node) {
+            var type = getTypeFromTypeNode(node.type);
+            var parent = node.parent;
+            var paramTag = node.parent.parent;
+            if (ts.isJSDocTypeExpression(node.parent) && ts.isJSDocParameterTag(paramTag)) {
+                // Else we will add a diagnostic, see `checkJSDocVariadicType`.
+                var host_1 = ts.getHostSignatureFromJSDoc(paramTag);
+                if (host_1) {
+                    /*
+                    Only return an array type if the corresponding parameter is marked as a rest parameter, or if there are no parameters.
+                    So in the following situation we will not create an array type:
+                        /** @param {...number} a * /
+                        function f(a) {}
+                    Because `a` will just be of type `number | undefined`. A synthetic `...args` will also be added, which *will* get an array type.
+                    */
+                    var lastParamDeclaration = ts.lastOrUndefined(host_1.parameters);
+                    var symbol = ts.getParameterSymbolFromJSDoc(paramTag);
+                    if (!lastParamDeclaration ||
+                        symbol && lastParamDeclaration.symbol === symbol && ts.isRestParameter(lastParamDeclaration)) {
+                        return createArrayType(type);
+                    }
+                }
+            }
+            if (ts.isParameter(parent) && ts.isJSDocFunctionType(parent.parent)) {
+                return createArrayType(type);
+            }
+            return addOptionality(type);
+        }
+        // Function and class expression bodies are checked after all statements in the enclosing body. This is
+        // to ensure constructs like the following are permitted:
+        //     const foo = function () {
+        //        const s = foo();
+        //        return "hello";
+        //     }
+        // Here, performing a full type check of the body of the function expression whilst in the process of
+        // determining the type of foo would cause foo to be given type any because of the recursive reference.
+        // Delaying the type check of the body ensures foo has been assigned a type.
+        function checkNodeDeferred(node) {
+            if (deferredNodes) {
+                deferredNodes.push(node);
+            }
+        }
+        function checkDeferredNodes() {
+            for (var _i = 0, _a = deferredNodes; _i < _a.length; _i++) {
+                var node = _a[_i];
+                switch (node.kind) {
+                    case 192 /* FunctionExpression */:
+                    case 193 /* ArrowFunction */:
+                    case 154 /* MethodDeclaration */:
+                    case 153 /* MethodSignature */:
+                        checkFunctionExpressionOrObjectLiteralMethodDeferred(node);
+                        break;
+                    case 156 /* GetAccessor */:
+                    case 157 /* SetAccessor */:
+                        checkAccessorDeclaration(node);
+                        break;
+                    case 205 /* ClassExpression */:
+                        checkClassExpressionDeferred(node);
+                        break;
+                }
+            }
+        }
+        function checkSourceFile(node) {
+            ts.performance.mark("beforeCheck");
+            checkSourceFileWorker(node);
+            ts.performance.mark("afterCheck");
+            ts.performance.measure("Check", "beforeCheck", "afterCheck");
+        }
+        function unusedIsError(kind) {
+            switch (kind) {
+                case 0 /* Local */:
+                    return !!compilerOptions.noUnusedLocals;
+                case 1 /* Parameter */:
+                    return !!compilerOptions.noUnusedParameters;
+                default:
+                    return ts.Debug.assertNever(kind);
+            }
+        }
+        function getPotentiallyUnusedIdentifiers(sourceFile) {
+            return allPotentiallyUnusedIdentifiers.get(sourceFile.path) || ts.emptyArray;
+        }
+        // Fully type check a source file and collect the relevant diagnostics.
+        function checkSourceFileWorker(node) {
+            var links = getNodeLinks(node);
+            if (!(links.flags & 1 /* TypeChecked */)) {
+                // If skipLibCheck is enabled, skip type checking if file is a declaration file.
+                // If skipDefaultLibCheck is enabled, skip type checking if file contains a
+                // '/// <reference no-default-lib="true"/>' directive.
+                if (compilerOptions.skipLibCheck && node.isDeclarationFile || compilerOptions.skipDefaultLibCheck && node.hasNoDefaultLib) {
+                    return;
+                }
+                // Grammar checking
+                checkGrammarSourceFile(node);
+                ts.clear(potentialThisCollisions);
+                ts.clear(potentialNewTargetCollisions);
+                deferredNodes = [];
+                ts.forEach(node.statements, checkSourceElement);
+                checkDeferredNodes();
+                if (ts.isExternalOrCommonJsModule(node)) {
+                    registerForUnusedIdentifiersCheck(node);
+                }
+                if (!node.isDeclarationFile && (compilerOptions.noUnusedLocals || compilerOptions.noUnusedParameters)) {
+                    checkUnusedIdentifiers(getPotentiallyUnusedIdentifiers(node), function (kind, diag) {
+                        if (unusedIsError(kind)) {
+                            diagnostics.add(diag);
+                        }
+                    });
+                }
+                deferredNodes = undefined;
+                if (ts.isExternalOrCommonJsModule(node)) {
+                    checkExternalModuleExports(node);
+                }
+                if (potentialThisCollisions.length) {
+                    ts.forEach(potentialThisCollisions, checkIfThisIsCapturedInEnclosingScope);
+                    ts.clear(potentialThisCollisions);
+                }
+                if (potentialNewTargetCollisions.length) {
+                    ts.forEach(potentialNewTargetCollisions, checkIfNewTargetIsCapturedInEnclosingScope);
+                    ts.clear(potentialNewTargetCollisions);
+                }
+                links.flags |= 1 /* TypeChecked */;
+            }
+        }
+        function getDiagnostics(sourceFile, ct) {
+            try {
+                // Record the cancellation token so it can be checked later on during checkSourceElement.
+                // Do this in a finally block so we can ensure that it gets reset back to nothing after
+                // this call is done.
+                cancellationToken = ct;
+                return getDiagnosticsWorker(sourceFile);
+            }
+            finally {
+                cancellationToken = undefined;
+            }
+        }
+        function getDiagnosticsWorker(sourceFile) {
+            throwIfNonDiagnosticsProducing();
+            if (sourceFile) {
+                // Some global diagnostics are deferred until they are needed and
+                // may not be reported in the firt call to getGlobalDiagnostics.
+                // We should catch these changes and report them.
+                var previousGlobalDiagnostics = diagnostics.getGlobalDiagnostics();
+                var previousGlobalDiagnosticsSize = previousGlobalDiagnostics.length;
+                checkSourceFile(sourceFile);
+                var semanticDiagnostics = diagnostics.getDiagnostics(sourceFile.fileName);
+                var currentGlobalDiagnostics = diagnostics.getGlobalDiagnostics();
+                if (currentGlobalDiagnostics !== previousGlobalDiagnostics) {
+                    // If the arrays are not the same reference, new diagnostics were added.
+                    var deferredGlobalDiagnostics = ts.relativeComplement(previousGlobalDiagnostics, currentGlobalDiagnostics, ts.compareDiagnostics);
+                    return ts.concatenate(deferredGlobalDiagnostics, semanticDiagnostics);
+                }
+                else if (previousGlobalDiagnosticsSize === 0 && currentGlobalDiagnostics.length > 0) {
+                    // If the arrays are the same reference, but the length has changed, a single
+                    // new diagnostic was added as DiagnosticCollection attempts to reuse the
+                    // same array.
+                    return ts.concatenate(currentGlobalDiagnostics, semanticDiagnostics);
+                }
+                return semanticDiagnostics;
+            }
+            // Global diagnostics are always added when a file is not provided to
+            // getDiagnostics
+            ts.forEach(host.getSourceFiles(), checkSourceFile);
+            return diagnostics.getDiagnostics();
+        }
+        function getGlobalDiagnostics() {
+            throwIfNonDiagnosticsProducing();
+            return diagnostics.getGlobalDiagnostics();
+        }
+        function throwIfNonDiagnosticsProducing() {
+            if (!produceDiagnostics) {
+                throw new Error("Trying to get diagnostics from a type checker that does not produce them.");
+            }
+        }
+        // Language service support
+        function getSymbolsInScope(location, meaning) {
+            if (location.flags & 8388608 /* InWithStatement */) {
+                // We cannot answer semantic questions within a with block, do not proceed any further
+                return [];
+            }
+            var symbols = ts.createSymbolTable();
+            var isStatic = false;
+            populateSymbols();
+            return symbolsToArray(symbols);
+            function populateSymbols() {
+                while (location) {
+                    if (location.locals && !isGlobalSourceFile(location)) {
+                        copySymbols(location.locals, meaning);
+                    }
+                    switch (location.kind) {
+                        case 239 /* ModuleDeclaration */:
+                            copySymbols(getSymbolOfNode(location).exports, meaning & 2623475 /* ModuleMember */);
+                            break;
+                        case 238 /* EnumDeclaration */:
+                            copySymbols(getSymbolOfNode(location).exports, meaning & 8 /* EnumMember */);
+                            break;
+                        case 205 /* ClassExpression */:
+                            var className = location.name;
+                            if (className) {
+                                copySymbol(location.symbol, meaning);
+                            }
+                        // falls through
+                        // this fall-through is necessary because we would like to handle
+                        // type parameter inside class expression similar to how we handle it in classDeclaration and interface Declaration
+                        case 235 /* ClassDeclaration */:
+                        case 236 /* InterfaceDeclaration */:
+                            // If we didn't come from static member of class or interface,
+                            // add the type parameters into the symbol table
+                            // (type parameters of classDeclaration/classExpression and interface are in member property of the symbol.
+                            // Note: that the memberFlags come from previous iteration.
+                            if (!isStatic) {
+                                copySymbols(getMembersOfSymbol(getSymbolOfNode(location)), meaning & 67901928 /* Type */);
+                            }
+                            break;
+                        case 192 /* FunctionExpression */:
+                            var funcName = location.name;
+                            if (funcName) {
+                                copySymbol(location.symbol, meaning);
+                            }
+                            break;
+                    }
+                    if (ts.introducesArgumentsExoticObject(location)) {
+                        copySymbol(argumentsSymbol, meaning);
+                    }
+                    isStatic = ts.hasModifier(location, 32 /* Static */);
+                    location = location.parent;
+                }
+                copySymbols(globals, meaning);
+            }
+            /**
+             * Copy the given symbol into symbol tables if the symbol has the given meaning
+             * and it doesn't already existed in the symbol table
+             * @param key a key for storing in symbol table; if undefined, use symbol.name
+             * @param symbol the symbol to be added into symbol table
+             * @param meaning meaning of symbol to filter by before adding to symbol table
+             */
+            function copySymbol(symbol, meaning) {
+                if (ts.getCombinedLocalAndExportSymbolFlags(symbol) & meaning) {
+                    var id = symbol.escapedName;
+                    // We will copy all symbol regardless of its reserved name because
+                    // symbolsToArray will check whether the key is a reserved name and
+                    // it will not copy symbol with reserved name to the array
+                    if (!symbols.has(id)) {
+                        symbols.set(id, symbol);
+                    }
+                }
+            }
+            function copySymbols(source, meaning) {
+                if (meaning) {
+                    source.forEach(function (symbol) {
+                        copySymbol(symbol, meaning);
+                    });
+                }
+            }
+        }
+        function isTypeDeclarationName(name) {
+            return name.kind === 71 /* Identifier */ &&
+                isTypeDeclaration(name.parent) &&
+                name.parent.name === name;
+        }
+        function isTypeDeclaration(node) {
+            switch (node.kind) {
+                case 148 /* TypeParameter */:
+                case 235 /* ClassDeclaration */:
+                case 236 /* InterfaceDeclaration */:
+                case 237 /* TypeAliasDeclaration */:
+                case 238 /* EnumDeclaration */:
+                    return true;
+                default:
+                    return false;
+            }
+        }
+        // True if the given identifier is part of a type reference
+        function isTypeReferenceIdentifier(node) {
+            while (node.parent.kind === 146 /* QualifiedName */) {
+                node = node.parent;
+            }
+            return node.parent.kind === 162 /* TypeReference */;
+        }
+        function isHeritageClauseElementIdentifier(node) {
+            while (node.parent.kind === 185 /* PropertyAccessExpression */) {
+                node = node.parent;
+            }
+            return node.parent.kind === 207 /* ExpressionWithTypeArguments */;
+        }
+        function forEachEnclosingClass(node, callback) {
+            var result;
+            while (true) {
+                node = ts.getContainingClass(node);
+                if (!node)
+                    break;
+                if (result = callback(node))
+                    break;
+            }
+            return result;
+        }
+        function isNodeWithinConstructorOfClass(node, classDeclaration) {
+            return ts.findAncestor(node, function (element) {
+                if (ts.isConstructorDeclaration(element) && ts.nodeIsPresent(element.body) && element.parent === classDeclaration) {
+                    return true;
+                }
+                else if (element === classDeclaration || ts.isFunctionLikeDeclaration(element)) {
+                    return "quit";
+                }
+                return false;
+            });
+        }
+        function isNodeWithinClass(node, classDeclaration) {
+            return !!forEachEnclosingClass(node, function (n) { return n === classDeclaration; });
+        }
+        function getLeftSideOfImportEqualsOrExportAssignment(nodeOnRightSide) {
+            while (nodeOnRightSide.parent.kind === 146 /* QualifiedName */) {
+                nodeOnRightSide = nodeOnRightSide.parent;
+            }
+            if (nodeOnRightSide.parent.kind === 243 /* ImportEqualsDeclaration */) {
+                return nodeOnRightSide.parent.moduleReference === nodeOnRightSide ? nodeOnRightSide.parent : undefined;
+            }
+            if (nodeOnRightSide.parent.kind === 249 /* ExportAssignment */) {
+                return nodeOnRightSide.parent.expression === nodeOnRightSide ? nodeOnRightSide.parent : undefined;
+            }
+            return undefined;
+        }
+        function isInRightSideOfImportOrExportAssignment(node) {
+            return getLeftSideOfImportEqualsOrExportAssignment(node) !== undefined;
+        }
+        function getSpecialPropertyAssignmentSymbolFromEntityName(entityName) {
+            var specialPropertyAssignmentKind = ts.getSpecialPropertyAssignmentKind(entityName.parent.parent);
+            switch (specialPropertyAssignmentKind) {
+                case 1 /* ExportsProperty */:
+                case 3 /* PrototypeProperty */:
+                    return getSymbolOfNode(entityName.parent);
+                case 4 /* ThisProperty */:
+                case 2 /* ModuleExports */:
+                case 5 /* Property */:
+                    return getSymbolOfNode(entityName.parent.parent);
+            }
+        }
+        function isImportTypeQualifierPart(node) {
+            var parent = node.parent;
+            while (ts.isQualifiedName(parent)) {
+                node = parent;
+                parent = parent.parent;
+            }
+            if (parent && parent.kind === 179 /* ImportType */ && parent.qualifier === node) {
+                return parent;
+            }
+            return undefined;
+        }
+        function getSymbolOfEntityNameOrPropertyAccessExpression(entityName) {
+            if (ts.isDeclarationName(entityName)) {
+                return getSymbolOfNode(entityName.parent);
+            }
+            if (ts.isInJavaScriptFile(entityName) &&
+                entityName.parent.kind === 185 /* PropertyAccessExpression */ &&
+                entityName.parent === entityName.parent.parent.left) {
+                // Check if this is a special property assignment
+                var specialPropertyAssignmentSymbol = getSpecialPropertyAssignmentSymbolFromEntityName(entityName);
+                if (specialPropertyAssignmentSymbol) {
+                    return specialPropertyAssignmentSymbol;
+                }
+            }
+            if (entityName.parent.kind === 249 /* ExportAssignment */ && ts.isEntityNameExpression(entityName)) {
+                // Even an entity name expression that doesn't resolve as an entityname may still typecheck as a property access expression
+                var success = resolveEntityName(entityName, 
+                /*all meanings*/ 67216319 /* Value */ | 67901928 /* Type */ | 1920 /* Namespace */ | 2097152 /* Alias */, /*ignoreErrors*/ true);
+                if (success && success !== unknownSymbol) {
+                    return success;
+                }
+            }
+            else if (!ts.isPropertyAccessExpression(entityName) && isInRightSideOfImportOrExportAssignment(entityName)) {
+                // Since we already checked for ExportAssignment, this really could only be an Import
+                var importEqualsDeclaration = ts.getAncestor(entityName, 243 /* ImportEqualsDeclaration */);
+                ts.Debug.assert(importEqualsDeclaration !== undefined);
+                return getSymbolOfPartOfRightHandSideOfImportEquals(entityName, /*dontResolveAlias*/ true);
+            }
+            if (!ts.isPropertyAccessExpression(entityName)) {
+                var possibleImportNode = isImportTypeQualifierPart(entityName);
+                if (possibleImportNode) {
+                    getTypeFromTypeNode(possibleImportNode);
+                    var sym = getNodeLinks(entityName).resolvedSymbol;
+                    return sym === unknownSymbol ? undefined : sym;
+                }
+            }
+            while (ts.isRightSideOfQualifiedNameOrPropertyAccess(entityName)) {
+                entityName = entityName.parent;
+            }
+            if (isHeritageClauseElementIdentifier(entityName)) {
+                var meaning = 0 /* None */;
+                // In an interface or class, we're definitely interested in a type.
+                if (entityName.parent.kind === 207 /* ExpressionWithTypeArguments */) {
+                    meaning = 67901928 /* Type */;
+                    // In a class 'extends' clause we are also looking for a value.
+                    if (ts.isExpressionWithTypeArgumentsInClassExtendsClause(entityName.parent)) {
+                        meaning |= 67216319 /* Value */;
+                    }
+                }
+                else {
+                    meaning = 1920 /* Namespace */;
+                }
+                meaning |= 2097152 /* Alias */;
+                var entityNameSymbol = ts.isEntityNameExpression(entityName) ? resolveEntityName(entityName, meaning) : undefined;
+                if (entityNameSymbol) {
+                    return entityNameSymbol;
+                }
+            }
+            if (entityName.parent.kind === 293 /* JSDocParameterTag */) {
+                return ts.getParameterSymbolFromJSDoc(entityName.parent);
+            }
+            if (entityName.parent.kind === 148 /* TypeParameter */ && entityName.parent.parent.kind === 296 /* JSDocTemplateTag */) {
+                ts.Debug.assert(!ts.isInJavaScriptFile(entityName)); // Otherwise `isDeclarationName` would have been true.
+                var typeParameter = ts.getTypeParameterFromJsDoc(entityName.parent);
+                return typeParameter && typeParameter.symbol;
+            }
+            if (ts.isExpressionNode(entityName)) {
+                if (ts.nodeIsMissing(entityName)) {
+                    // Missing entity name.
+                    return undefined;
+                }
+                if (entityName.kind === 71 /* Identifier */) {
+                    if (ts.isJSXTagName(entityName) && isJsxIntrinsicIdentifier(entityName)) {
+                        var symbol = getIntrinsicTagSymbol(entityName.parent);
+                        return symbol === unknownSymbol ? undefined : symbol;
+                    }
+                    return resolveEntityName(entityName, 67216319 /* Value */, /*ignoreErrors*/ false, /*dontResolveAlias*/ true);
+                }
+                else if (entityName.kind === 185 /* PropertyAccessExpression */ || entityName.kind === 146 /* QualifiedName */) {
+                    var links = getNodeLinks(entityName);
+                    if (links.resolvedSymbol) {
+                        return links.resolvedSymbol;
+                    }
+                    if (entityName.kind === 185 /* PropertyAccessExpression */) {
+                        checkPropertyAccessExpression(entityName);
+                    }
+                    else {
+                        checkQualifiedName(entityName);
+                    }
+                    return links.resolvedSymbol;
+                }
+            }
+            else if (isTypeReferenceIdentifier(entityName)) {
+                var meaning = entityName.parent.kind === 162 /* TypeReference */ ? 67901928 /* Type */ : 1920 /* Namespace */;
+                return resolveEntityName(entityName, meaning, /*ignoreErrors*/ false, /*dontResolveAlias*/ true);
+            }
+            else if (entityName.parent.kind === 262 /* JsxAttribute */) {
+                return getJsxAttributePropertySymbol(entityName.parent);
+            }
+            if (entityName.parent.kind === 161 /* TypePredicate */) {
+                return resolveEntityName(entityName, /*meaning*/ 1 /* FunctionScopedVariable */);
+            }
+            // Do we want to return undefined here?
+            return undefined;
+        }
+        function getSymbolAtLocation(node) {
+            if (node.kind === 274 /* SourceFile */) {
+                return ts.isExternalModule(node) ? getMergedSymbol(node.symbol) : undefined;
+            }
+            var parent = node.parent;
+            var grandParent = parent.parent;
+            if (node.flags & 8388608 /* InWithStatement */) {
+                // We cannot answer semantic questions within a with block, do not proceed any further
+                return undefined;
+            }
+            if (isDeclarationNameOrImportPropertyName(node)) {
+                // This is a declaration, call getSymbolOfNode
+                return getSymbolOfNode(parent);
+            }
+            else if (ts.isLiteralComputedPropertyDeclarationName(node)) {
+                return getSymbolOfNode(parent.parent);
+            }
+            if (node.kind === 71 /* Identifier */) {
+                if (isInRightSideOfImportOrExportAssignment(node)) {
+                    return getSymbolOfEntityNameOrPropertyAccessExpression(node);
+                }
+                else if (parent.kind === 182 /* BindingElement */ &&
+                    grandParent.kind === 180 /* ObjectBindingPattern */ &&
+                    node === parent.propertyName) {
+                    var typeOfPattern = getTypeOfNode(grandParent);
+                    var propertyDeclaration = typeOfPattern && getPropertyOfType(typeOfPattern, node.escapedText);
+                    if (propertyDeclaration) {
+                        return propertyDeclaration;
+                    }
+                }
+            }
+            switch (node.kind) {
+                case 71 /* Identifier */:
+                case 185 /* PropertyAccessExpression */:
+                case 146 /* QualifiedName */:
+                    return getSymbolOfEntityNameOrPropertyAccessExpression(node);
+                case 99 /* ThisKeyword */:
+                    var container = ts.getThisContainer(node, /*includeArrowFunctions*/ false);
+                    if (ts.isFunctionLike(container)) {
+                        var sig = getSignatureFromDeclaration(container);
+                        if (sig.thisParameter) {
+                            return sig.thisParameter;
+                        }
+                    }
+                    if (ts.isInExpressionContext(node)) {
+                        return checkExpression(node).symbol;
+                    }
+                // falls through
+                case 174 /* ThisType */:
+                    return getTypeFromThisTypeNode(node).symbol;
+                case 97 /* SuperKeyword */:
+                    return checkExpression(node).symbol;
+                case 123 /* ConstructorKeyword */:
+                    // constructor keyword for an overload, should take us to the definition if it exist
+                    var constructorDeclaration = node.parent;
+                    if (constructorDeclaration && constructorDeclaration.kind === 155 /* Constructor */) {
+                        return constructorDeclaration.parent.symbol;
+                    }
+                    return undefined;
+                case 9 /* StringLiteral */:
+                case 13 /* NoSubstitutionTemplateLiteral */:
+                    // 1). import x = require("./mo/*gotToDefinitionHere*/d")
+                    // 2). External module name in an import declaration
+                    // 3). Dynamic import call or require in javascript
+                    // 4). type A = import("./f/*gotToDefinitionHere*/oo")
+                    if ((ts.isExternalModuleImportEqualsDeclaration(node.parent.parent) && ts.getExternalModuleImportEqualsDeclarationExpression(node.parent.parent) === node) ||
+                        ((node.parent.kind === 244 /* ImportDeclaration */ || node.parent.kind === 250 /* ExportDeclaration */) && node.parent.moduleSpecifier === node) ||
+                        ((ts.isInJavaScriptFile(node) && ts.isRequireCall(node.parent, /*checkArgumentIsStringLiteralLike*/ false)) || ts.isImportCall(node.parent)) ||
+                        (ts.isLiteralTypeNode(node.parent) && ts.isLiteralImportTypeNode(node.parent.parent) && node.parent.parent.argument === node.parent)) {
+                        return resolveExternalModuleName(node, node);
+                    }
+                // falls through
+                case 8 /* NumericLiteral */:
+                    // index access
+                    var objectType = ts.isElementAccessExpression(parent)
+                        ? parent.argumentExpression === node ? getTypeOfExpression(parent.expression) : undefined
+                        : ts.isLiteralTypeNode(parent) && ts.isIndexedAccessTypeNode(grandParent)
+                            ? getTypeFromTypeNode(grandParent.objectType)
+                            : undefined;
+                    return objectType && getPropertyOfType(objectType, ts.escapeLeadingUnderscores(node.text));
+                case 79 /* DefaultKeyword */:
+                case 89 /* FunctionKeyword */:
+                case 36 /* EqualsGreaterThanToken */:
+                    return getSymbolOfNode(node.parent);
+                case 179 /* ImportType */:
+                    return ts.isLiteralImportTypeNode(node) ? getSymbolAtLocation(node.argument.literal) : undefined;
+                default:
+                    return undefined;
+            }
+        }
+        function getShorthandAssignmentValueSymbol(location) {
+            if (location && location.kind === 271 /* ShorthandPropertyAssignment */) {
+                return resolveEntityName(location.name, 67216319 /* Value */ | 2097152 /* Alias */);
+            }
+            return undefined;
+        }
+        /** Returns the target of an export specifier without following aliases */
+        function getExportSpecifierLocalTargetSymbol(node) {
+            return node.parent.parent.moduleSpecifier ?
+                getExternalModuleMember(node.parent.parent, node) :
+                resolveEntityName(node.propertyName || node.name, 67216319 /* Value */ | 67901928 /* Type */ | 1920 /* Namespace */ | 2097152 /* Alias */);
+        }
+        function getTypeOfNode(node) {
+            if (node.flags & 8388608 /* InWithStatement */) {
+                // We cannot answer semantic questions within a with block, do not proceed any further
+                return errorType;
+            }
+            if (ts.isPartOfTypeNode(node)) {
+                var typeFromTypeNode = getTypeFromTypeNode(node);
+                if (typeFromTypeNode && ts.isExpressionWithTypeArgumentsInClassImplementsClause(node)) {
+                    var containingClass = ts.getContainingClass(node);
+                    var classType = getTypeOfNode(containingClass);
+                    typeFromTypeNode = getTypeWithThisArgument(typeFromTypeNode, classType.thisType);
+                }
+                return typeFromTypeNode;
+            }
+            if (ts.isExpressionNode(node)) {
+                return getRegularTypeOfExpression(node);
+            }
+            if (ts.isExpressionWithTypeArgumentsInClassExtendsClause(node)) {
+                // A SyntaxKind.ExpressionWithTypeArguments is considered a type node, except when it occurs in the
+                // extends clause of a class. We handle that case here.
+                var classNode = ts.getContainingClass(node);
+                var classType = getDeclaredTypeOfSymbol(getSymbolOfNode(classNode));
+                var baseType = getBaseTypes(classType)[0];
+                return baseType && getTypeWithThisArgument(baseType, classType.thisType);
+            }
+            if (isTypeDeclaration(node)) {
+                // In this case, we call getSymbolOfNode instead of getSymbolAtLocation because it is a declaration
+                var symbol = getSymbolOfNode(node);
+                return getDeclaredTypeOfSymbol(symbol);
+            }
+            if (isTypeDeclarationName(node)) {
+                var symbol = getSymbolAtLocation(node);
+                return symbol && getDeclaredTypeOfSymbol(symbol);
+            }
+            if (ts.isDeclaration(node)) {
+                // In this case, we call getSymbolOfNode instead of getSymbolAtLocation because it is a declaration
+                var symbol = getSymbolOfNode(node);
+                return getTypeOfSymbol(symbol);
+            }
+            if (isDeclarationNameOrImportPropertyName(node)) {
+                var symbol = getSymbolAtLocation(node);
+                return symbol && getTypeOfSymbol(symbol);
+            }
+            if (ts.isBindingPattern(node)) {
+                return getTypeForVariableLikeDeclaration(node.parent, /*includeOptionality*/ true);
+            }
+            if (isInRightSideOfImportOrExportAssignment(node)) {
+                var symbol = getSymbolAtLocation(node);
+                if (symbol) {
+                    var declaredType = getDeclaredTypeOfSymbol(symbol);
+                    return declaredType !== errorType ? declaredType : getTypeOfSymbol(symbol);
+                }
+            }
+            return errorType;
+        }
+        // Gets the type of object literal or array literal of destructuring assignment.
+        // { a } from
+        //     for ( { a } of elems) {
+        //     }
+        // [ a ] from
+        //     [a] = [ some array ...]
+        function getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr) {
+            ts.Debug.assert(expr.kind === 184 /* ObjectLiteralExpression */ || expr.kind === 183 /* ArrayLiteralExpression */);
+            // If this is from "for of"
+            //     for ( { a } of elems) {
+            //     }
+            if (expr.parent.kind === 222 /* ForOfStatement */) {
+                var iteratedType = checkRightHandSideOfForOf(expr.parent.expression, expr.parent.awaitModifier);
+                return checkDestructuringAssignment(expr, iteratedType || errorType);
+            }
+            // If this is from "for" initializer
+            //     for ({a } = elems[0];.....) { }
+            if (expr.parent.kind === 200 /* BinaryExpression */) {
+                var iteratedType = getTypeOfExpression(expr.parent.right);
+                return checkDestructuringAssignment(expr, iteratedType || errorType);
+            }
+            // If this is from nested object binding pattern
+            //     for ({ skills: { primary, secondary } } = multiRobot, i = 0; i < 1; i++) {
+            if (expr.parent.kind === 270 /* PropertyAssignment */) {
+                var typeOfParentObjectLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr.parent.parent);
+                return checkObjectLiteralDestructuringPropertyAssignment(typeOfParentObjectLiteral || errorType, expr.parent); // TODO: GH#18217
+            }
+            // Array literal assignment - array destructuring pattern
+            ts.Debug.assert(expr.parent.kind === 183 /* ArrayLiteralExpression */);
+            //    [{ property1: p1, property2 }] = elems;
+            var typeOfArrayLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr.parent);
+            var elementType = checkIteratedTypeOrElementType(typeOfArrayLiteral || errorType, expr.parent, /*allowStringInput*/ false, /*allowAsyncIterables*/ false) || errorType;
+            return checkArrayLiteralDestructuringElementAssignment(expr.parent, typeOfArrayLiteral, expr.parent.elements.indexOf(expr), elementType || errorType); // TODO: GH#18217
+        }
+        // Gets the property symbol corresponding to the property in destructuring assignment
+        // 'property1' from
+        //     for ( { property1: a } of elems) {
+        //     }
+        // 'property1' at location 'a' from:
+        //     [a] = [ property1, property2 ]
+        function getPropertySymbolOfDestructuringAssignment(location) {
+            // Get the type of the object or array literal and then look for property of given name in the type
+            var typeOfObjectLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(location.parent.parent);
+            return typeOfObjectLiteral && getPropertyOfType(typeOfObjectLiteral, location.escapedText);
+        }
+        function getRegularTypeOfExpression(expr) {
+            if (ts.isRightSideOfQualifiedNameOrPropertyAccess(expr)) {
+                expr = expr.parent;
+            }
+            return getRegularTypeOfLiteralType(getTypeOfExpression(expr));
+        }
+        /**
+         * Gets either the static or instance type of a class element, based on
+         * whether the element is declared as "static".
+         */
+        function getParentTypeOfClassElement(node) {
+            var classSymbol = getSymbolOfNode(node.parent);
+            return ts.hasModifier(node, 32 /* Static */)
+                ? getTypeOfSymbol(classSymbol)
+                : getDeclaredTypeOfSymbol(classSymbol);
+        }
+        // Return the list of properties of the given type, augmented with properties from Function
+        // if the type has call or construct signatures
+        function getAugmentedPropertiesOfType(type) {
+            type = getApparentType(type);
+            var propsByName = ts.createSymbolTable(getPropertiesOfType(type));
+            if (typeHasCallOrConstructSignatures(type)) {
+                ts.forEach(getPropertiesOfType(globalFunctionType), function (p) {
+                    if (!propsByName.has(p.escapedName)) {
+                        propsByName.set(p.escapedName, p);
+                    }
+                });
+            }
+            return getNamedMembers(propsByName);
+        }
+        function typeHasCallOrConstructSignatures(type) {
+            return ts.typeHasCallOrConstructSignatures(type, checker);
+        }
+        function getRootSymbols(symbol) {
+            var roots = getImmediateRootSymbols(symbol);
+            return roots ? ts.flatMap(roots, getRootSymbols) : [symbol];
+        }
+        function getImmediateRootSymbols(symbol) {
+            if (ts.getCheckFlags(symbol) & 6 /* Synthetic */) {
+                return ts.mapDefined(getSymbolLinks(symbol).containingType.types, function (type) { return getPropertyOfType(type, symbol.escapedName); });
+            }
+            else if (symbol.flags & 33554432 /* Transient */) {
+                var _a = symbol, leftSpread = _a.leftSpread, rightSpread = _a.rightSpread, syntheticOrigin = _a.syntheticOrigin;
+                return leftSpread ? [leftSpread, rightSpread]
+                    : syntheticOrigin ? [syntheticOrigin]
+                        : ts.singleElementArray(tryGetAliasTarget(symbol));
+            }
+            return undefined;
+        }
+        function tryGetAliasTarget(symbol) {
+            var target;
+            var next = symbol;
+            while (next = getSymbolLinks(next).target) {
+                target = next;
+            }
+            return target;
+        }
+        // Emitter support
+        function isArgumentsLocalBinding(nodeIn) {
+            if (!ts.isGeneratedIdentifier(nodeIn)) {
+                var node = ts.getParseTreeNode(nodeIn, ts.isIdentifier);
+                if (node) {
+                    var isPropertyName_1 = node.parent.kind === 185 /* PropertyAccessExpression */ && node.parent.name === node;
+                    return !isPropertyName_1 && getReferencedValueSymbol(node) === argumentsSymbol;
+                }
+            }
+            return false;
+        }
+        function moduleExportsSomeValue(moduleReferenceExpression) {
+            var moduleSymbol = resolveExternalModuleName(moduleReferenceExpression.parent, moduleReferenceExpression);
+            if (!moduleSymbol || ts.isShorthandAmbientModuleSymbol(moduleSymbol)) {
+                // If the module is not found or is shorthand, assume that it may export a value.
+                return true;
+            }
+            var hasExportAssignment = hasExportAssignmentSymbol(moduleSymbol);
+            // if module has export assignment then 'resolveExternalModuleSymbol' will return resolved symbol for export assignment
+            // otherwise it will return moduleSymbol itself
+            moduleSymbol = resolveExternalModuleSymbol(moduleSymbol);
+            var symbolLinks = getSymbolLinks(moduleSymbol);
+            if (symbolLinks.exportsSomeValue === undefined) {
+                // for export assignments - check if resolved symbol for RHS is itself a value
+                // otherwise - check if at least one export is value
+                symbolLinks.exportsSomeValue = hasExportAssignment
+                    ? !!(moduleSymbol.flags & 67216319 /* Value */)
+                    : ts.forEachEntry(getExportsOfModule(moduleSymbol), isValue);
+            }
+            return symbolLinks.exportsSomeValue;
+            function isValue(s) {
+                s = resolveSymbol(s);
+                return s && !!(s.flags & 67216319 /* Value */);
+            }
+        }
+        function isNameOfModuleOrEnumDeclaration(node) {
+            return ts.isModuleOrEnumDeclaration(node.parent) && node === node.parent.name;
+        }
+        // When resolved as an expression identifier, if the given node references an exported entity, return the declaration
+        // node of the exported entity's container. Otherwise, return undefined.
+        function getReferencedExportContainer(nodeIn, prefixLocals) {
+            var node = ts.getParseTreeNode(nodeIn, ts.isIdentifier);
+            if (node) {
+                // When resolving the export container for the name of a module or enum
+                // declaration, we need to start resolution at the declaration's container.
+                // Otherwise, we could incorrectly resolve the export container as the
+                // declaration if it contains an exported member with the same name.
+                var symbol = getReferencedValueSymbol(node, /*startInDeclarationContainer*/ isNameOfModuleOrEnumDeclaration(node));
+                if (symbol) {
+                    if (symbol.flags & 1048576 /* ExportValue */) {
+                        // If we reference an exported entity within the same module declaration, then whether
+                        // we prefix depends on the kind of entity. SymbolFlags.ExportHasLocal encompasses all the
+                        // kinds that we do NOT prefix.
+                        var exportSymbol = getMergedSymbol(symbol.exportSymbol);
+                        if (!prefixLocals && exportSymbol.flags & 944 /* ExportHasLocal */ && !(exportSymbol.flags & 3 /* Variable */)) {
+                            return undefined;
+                        }
+                        symbol = exportSymbol;
+                    }
+                    var parentSymbol_1 = getParentOfSymbol(symbol);
+                    if (parentSymbol_1) {
+                        if (parentSymbol_1.flags & 512 /* ValueModule */ && parentSymbol_1.valueDeclaration.kind === 274 /* SourceFile */) {
+                            var symbolFile = parentSymbol_1.valueDeclaration;
+                            var referenceFile = ts.getSourceFileOfNode(node);
+                            // If `node` accesses an export and that export isn't in the same file, then symbol is a namespace export, so return undefined.
+                            var symbolIsUmdExport = symbolFile !== referenceFile;
+                            return symbolIsUmdExport ? undefined : symbolFile;
+                        }
+                        return ts.findAncestor(node.parent, function (n) { return ts.isModuleOrEnumDeclaration(n) && getSymbolOfNode(n) === parentSymbol_1; });
+                    }
+                }
+            }
+        }
+        // When resolved as an expression identifier, if the given node references an import, return the declaration of
+        // that import. Otherwise, return undefined.
+        function getReferencedImportDeclaration(nodeIn) {
+            var node = ts.getParseTreeNode(nodeIn, ts.isIdentifier);
+            if (node) {
+                var symbol = getReferencedValueSymbol(node);
+                // We should only get the declaration of an alias if there isn't a local value
+                // declaration for the symbol
+                if (isNonLocalAlias(symbol, /*excludes*/ 67216319 /* Value */)) {
+                    return getDeclarationOfAliasSymbol(symbol);
+                }
+            }
+            return undefined;
+        }
+        function isSymbolOfDeclarationWithCollidingName(symbol) {
+            if (symbol.flags & 418 /* BlockScoped */) {
+                var links = getSymbolLinks(symbol);
+                if (links.isDeclarationWithCollidingName === undefined) {
+                    var container = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
+                    if (ts.isStatementWithLocals(container)) {
+                        var nodeLinks_1 = getNodeLinks(symbol.valueDeclaration);
+                        if (resolveName(container.parent, symbol.escapedName, 67216319 /* Value */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined, /*isUse*/ false)) {
+                            // redeclaration - always should be renamed
+                            links.isDeclarationWithCollidingName = true;
+                        }
+                        else if (nodeLinks_1.flags & 131072 /* CapturedBlockScopedBinding */) {
+                            // binding is captured in the function
+                            // should be renamed if:
+                            // - binding is not top level - top level bindings never collide with anything
+                            // AND
+                            //   - binding is not declared in loop, should be renamed to avoid name reuse across siblings
+                            //     let a, b
+                            //     { let x = 1; a = () => x; }
+                            //     { let x = 100; b = () => x; }
+                            //     console.log(a()); // should print '1'
+                            //     console.log(b()); // should print '100'
+                            //     OR
+                            //   - binding is declared inside loop but not in inside initializer of iteration statement or directly inside loop body
+                            //     * variables from initializer are passed to rewritten loop body as parameters so they are not captured directly
+                            //     * variables that are declared immediately in loop body will become top level variable after loop is rewritten and thus
+                            //       they will not collide with anything
+                            var isDeclaredInLoop = nodeLinks_1.flags & 262144 /* BlockScopedBindingInLoop */;
+                            var inLoopInitializer = ts.isIterationStatement(container, /*lookInLabeledStatements*/ false);
+                            var inLoopBodyBlock = container.kind === 213 /* Block */ && ts.isIterationStatement(container.parent, /*lookInLabeledStatements*/ false);
+                            links.isDeclarationWithCollidingName = !ts.isBlockScopedContainerTopLevel(container) && (!isDeclaredInLoop || (!inLoopInitializer && !inLoopBodyBlock));
+                        }
+                        else {
+                            links.isDeclarationWithCollidingName = false;
+                        }
+                    }
+                }
+                return links.isDeclarationWithCollidingName;
+            }
+            return false;
+        }
+        // When resolved as an expression identifier, if the given node references a nested block scoped entity with
+        // a name that either hides an existing name or might hide it when compiled downlevel,
+        // return the declaration of that entity. Otherwise, return undefined.
+        function getReferencedDeclarationWithCollidingName(nodeIn) {
+            if (!ts.isGeneratedIdentifier(nodeIn)) {
+                var node = ts.getParseTreeNode(nodeIn, ts.isIdentifier);
+                if (node) {
+                    var symbol = getReferencedValueSymbol(node);
+                    if (symbol && isSymbolOfDeclarationWithCollidingName(symbol)) {
+                        return symbol.valueDeclaration;
+                    }
+                }
+            }
+            return undefined;
+        }
+        // Return true if the given node is a declaration of a nested block scoped entity with a name that either hides an
+        // existing name or might hide a name when compiled downlevel
+        function isDeclarationWithCollidingName(nodeIn) {
+            var node = ts.getParseTreeNode(nodeIn, ts.isDeclaration);
+            if (node) {
+                var symbol = getSymbolOfNode(node);
+                if (symbol) {
+                    return isSymbolOfDeclarationWithCollidingName(symbol);
+                }
+            }
+            return false;
+        }
+        function isValueAliasDeclaration(node) {
+            switch (node.kind) {
+                case 243 /* ImportEqualsDeclaration */:
+                case 245 /* ImportClause */:
+                case 246 /* NamespaceImport */:
+                case 248 /* ImportSpecifier */:
+                case 252 /* ExportSpecifier */:
+                    return isAliasResolvedToValue(getSymbolOfNode(node) || unknownSymbol);
+                case 250 /* ExportDeclaration */:
+                    var exportClause = node.exportClause;
+                    return !!exportClause && ts.some(exportClause.elements, isValueAliasDeclaration);
+                case 249 /* ExportAssignment */:
+                    return node.expression
+                        && node.expression.kind === 71 /* Identifier */
+                        ? isAliasResolvedToValue(getSymbolOfNode(node) || unknownSymbol)
+                        : true;
+            }
+            return false;
+        }
+        function isTopLevelValueImportEqualsWithEntityName(nodeIn) {
+            var node = ts.getParseTreeNode(nodeIn, ts.isImportEqualsDeclaration);
+            if (node === undefined || node.parent.kind !== 274 /* SourceFile */ || !ts.isInternalModuleImportEqualsDeclaration(node)) {
+                // parent is not source file or it is not reference to internal module
+                return false;
+            }
+            var isValue = isAliasResolvedToValue(getSymbolOfNode(node));
+            return isValue && node.moduleReference && !ts.nodeIsMissing(node.moduleReference);
+        }
+        function isAliasResolvedToValue(symbol) {
+            var target = resolveAlias(symbol);
+            if (target === unknownSymbol) {
+                return true;
+            }
+            // const enums and modules that contain only const enums are not considered values from the emit perspective
+            // unless 'preserveConstEnums' option is set to true
+            return !!(target.flags & 67216319 /* Value */) &&
+                (compilerOptions.preserveConstEnums || !isConstEnumOrConstEnumOnlyModule(target));
+        }
+        function isConstEnumOrConstEnumOnlyModule(s) {
+            return isConstEnumSymbol(s) || !!s.constEnumOnlyModule;
+        }
+        function isReferencedAliasDeclaration(node, checkChildren) {
+            if (ts.isAliasSymbolDeclaration(node)) {
+                var symbol = getSymbolOfNode(node);
+                if (symbol && getSymbolLinks(symbol).referenced) {
+                    return true;
+                }
+                var target = getSymbolLinks(symbol).target; // TODO: GH#18217
+                if (target && ts.getModifierFlags(node) & 1 /* Export */ && target.flags & 67216319 /* Value */) {
+                    // An `export import ... =` of a value symbol is always considered referenced
+                    return true;
+                }
+            }
+            if (checkChildren) {
+                return !!ts.forEachChild(node, function (node) { return isReferencedAliasDeclaration(node, checkChildren); });
+            }
+            return false;
+        }
+        function isImplementationOfOverload(node) {
+            if (ts.nodeIsPresent(node.body)) {
+                if (ts.isGetAccessor(node) || ts.isSetAccessor(node))
+                    return false; // Get or set accessors can never be overload implementations, but can have up to 2 signatures
+                var symbol = getSymbolOfNode(node);
+                var signaturesOfSymbol = getSignaturesOfSymbol(symbol);
+                // If this function body corresponds to function with multiple signature, it is implementation of overload
+                // e.g.: function foo(a: string): string;
+                //       function foo(a: number): number;
+                //       function foo(a: any) { // This is implementation of the overloads
+                //           return a;
+                //       }
+                return signaturesOfSymbol.length > 1 ||
+                    // If there is single signature for the symbol, it is overload if that signature isn't coming from the node
+                    // e.g.: function foo(a: string): string;
+                    //       function foo(a: any) { // This is implementation of the overloads
+                    //           return a;
+                    //       }
+                    (signaturesOfSymbol.length === 1 && signaturesOfSymbol[0].declaration !== node);
+            }
+            return false;
+        }
+        function isRequiredInitializedParameter(parameter) {
+            return !!strictNullChecks &&
+                !isOptionalParameter(parameter) &&
+                !ts.isJSDocParameterTag(parameter) &&
+                !!parameter.initializer &&
+                !ts.hasModifier(parameter, 92 /* ParameterPropertyModifier */);
+        }
+        function isOptionalUninitializedParameterProperty(parameter) {
+            return strictNullChecks &&
+                isOptionalParameter(parameter) &&
+                !parameter.initializer &&
+                ts.hasModifier(parameter, 92 /* ParameterPropertyModifier */);
+        }
+        function getNodeCheckFlags(node) {
+            return getNodeLinks(node).flags || 0;
+        }
+        function getEnumMemberValue(node) {
+            computeEnumMemberValues(node.parent);
+            return getNodeLinks(node).enumMemberValue;
+        }
+        function canHaveConstantValue(node) {
+            switch (node.kind) {
+                case 273 /* EnumMember */:
+                case 185 /* PropertyAccessExpression */:
+                case 186 /* ElementAccessExpression */:
+                    return true;
+            }
+            return false;
+        }
+        function getConstantValue(node) {
+            if (node.kind === 273 /* EnumMember */) {
+                return getEnumMemberValue(node);
+            }
+            var symbol = getNodeLinks(node).resolvedSymbol;
+            if (symbol && (symbol.flags & 8 /* EnumMember */)) {
+                // inline property\index accesses only for const enums
+                if (ts.isConstEnumDeclaration(symbol.valueDeclaration.parent)) {
+                    return getEnumMemberValue(symbol.valueDeclaration);
+                }
+            }
+            return undefined;
+        }
+        function isFunctionType(type) {
+            return !!(type.flags & 131072 /* Object */) && getSignaturesOfType(type, 0 /* Call */).length > 0;
+        }
+        function getTypeReferenceSerializationKind(typeNameIn, location) {
+            // ensure both `typeName` and `location` are parse tree nodes.
+            var typeName = ts.getParseTreeNode(typeNameIn, ts.isEntityName);
+            if (!typeName)
+                return ts.TypeReferenceSerializationKind.Unknown;
+            if (location) {
+                location = ts.getParseTreeNode(location);
+                if (!location)
+                    return ts.TypeReferenceSerializationKind.Unknown;
+            }
+            // Resolve the symbol as a value to ensure the type can be reached at runtime during emit.
+            var valueSymbol = resolveEntityName(typeName, 67216319 /* Value */, /*ignoreErrors*/ true, /*dontResolveAlias*/ false, location);
+            // Resolve the symbol as a type so that we can provide a more useful hint for the type serializer.
+            var typeSymbol = resolveEntityName(typeName, 67901928 /* Type */, /*ignoreErrors*/ true, /*dontResolveAlias*/ false, location);
+            if (valueSymbol && valueSymbol === typeSymbol) {
+                var globalPromiseSymbol = getGlobalPromiseConstructorSymbol(/*reportErrors*/ false);
+                if (globalPromiseSymbol && valueSymbol === globalPromiseSymbol) {
+                    return ts.TypeReferenceSerializationKind.Promise;
+                }
+                var constructorType = getTypeOfSymbol(valueSymbol);
+                if (constructorType && isConstructorType(constructorType)) {
+                    return ts.TypeReferenceSerializationKind.TypeWithConstructSignatureAndValue;
+                }
+            }
+            // We might not be able to resolve type symbol so use unknown type in that case (eg error case)
+            if (!typeSymbol) {
+                return ts.TypeReferenceSerializationKind.Unknown;
+            }
+            var type = getDeclaredTypeOfSymbol(typeSymbol);
+            if (type === errorType) {
+                return ts.TypeReferenceSerializationKind.Unknown;
+            }
+            else if (type.flags & 3 /* AnyOrUnknown */) {
+                return ts.TypeReferenceSerializationKind.ObjectType;
+            }
+            else if (isTypeAssignableToKind(type, 4096 /* Void */ | 24576 /* Nullable */ | 32768 /* Never */)) {
+                return ts.TypeReferenceSerializationKind.VoidNullableOrNeverType;
+            }
+            else if (isTypeAssignableToKind(type, 272 /* BooleanLike */)) {
+                return ts.TypeReferenceSerializationKind.BooleanType;
+            }
+            else if (isTypeAssignableToKind(type, 168 /* NumberLike */)) {
+                return ts.TypeReferenceSerializationKind.NumberLikeType;
+            }
+            else if (isTypeAssignableToKind(type, 68 /* StringLike */)) {
+                return ts.TypeReferenceSerializationKind.StringLikeType;
+            }
+            else if (isTupleType(type)) {
+                return ts.TypeReferenceSerializationKind.ArrayLikeType;
+            }
+            else if (isTypeAssignableToKind(type, 3072 /* ESSymbolLike */)) {
+                return ts.TypeReferenceSerializationKind.ESSymbolType;
+            }
+            else if (isFunctionType(type)) {
+                return ts.TypeReferenceSerializationKind.TypeWithCallSignature;
+            }
+            else if (isArrayType(type)) {
+                return ts.TypeReferenceSerializationKind.ArrayLikeType;
+            }
+            else {
+                return ts.TypeReferenceSerializationKind.ObjectType;
+            }
+        }
+        function createTypeOfDeclaration(declarationIn, enclosingDeclaration, flags, tracker, addUndefined) {
+            var declaration = ts.getParseTreeNode(declarationIn, ts.isVariableLikeOrAccessor);
+            if (!declaration) {
+                return ts.createToken(119 /* AnyKeyword */);
+            }
+            // Get type of the symbol if this is the valid symbol otherwise get type at location
+            var symbol = getSymbolOfNode(declaration);
+            var type = symbol && !(symbol.flags & (2048 /* TypeLiteral */ | 131072 /* Signature */))
+                ? getWidenedLiteralType(getTypeOfSymbol(symbol))
+                : errorType;
+            if (type.flags & 2048 /* UniqueESSymbol */ &&
+                type.symbol === symbol) {
+                flags |= 1048576 /* AllowUniqueESSymbolType */;
+            }
+            if (addUndefined) {
+                type = getOptionalType(type);
+            }
+            return nodeBuilder.typeToTypeNode(type, enclosingDeclaration, flags | 1024 /* MultilineObjectLiterals */, tracker);
+        }
+        function createReturnTypeOfSignatureDeclaration(signatureDeclarationIn, enclosingDeclaration, flags, tracker) {
+            var signatureDeclaration = ts.getParseTreeNode(signatureDeclarationIn, ts.isFunctionLike);
+            if (!signatureDeclaration) {
+                return ts.createToken(119 /* AnyKeyword */);
+            }
+            var signature = getSignatureFromDeclaration(signatureDeclaration);
+            return nodeBuilder.typeToTypeNode(getReturnTypeOfSignature(signature), enclosingDeclaration, flags | 1024 /* MultilineObjectLiterals */, tracker);
+        }
+        function createTypeOfExpression(exprIn, enclosingDeclaration, flags, tracker) {
+            var expr = ts.getParseTreeNode(exprIn, ts.isExpression);
+            if (!expr) {
+                return ts.createToken(119 /* AnyKeyword */);
+            }
+            var type = getWidenedType(getRegularTypeOfExpression(expr));
+            return nodeBuilder.typeToTypeNode(type, enclosingDeclaration, flags | 1024 /* MultilineObjectLiterals */, tracker);
+        }
+        function hasGlobalName(name) {
+            return globals.has(ts.escapeLeadingUnderscores(name));
+        }
+        function getReferencedValueSymbol(reference, startInDeclarationContainer) {
+            var resolvedSymbol = getNodeLinks(reference).resolvedSymbol;
+            if (resolvedSymbol) {
+                return resolvedSymbol;
+            }
+            var location = reference;
+            if (startInDeclarationContainer) {
+                // When resolving the name of a declaration as a value, we need to start resolution
+                // at a point outside of the declaration.
+                var parent = reference.parent;
+                if (ts.isDeclaration(parent) && reference === parent.name) {
+                    location = getDeclarationContainer(parent);
+                }
+            }
+            return resolveName(location, reference.escapedText, 67216319 /* Value */ | 1048576 /* ExportValue */ | 2097152 /* Alias */, /*nodeNotFoundMessage*/ undefined, /*nameArg*/ undefined, /*isUse*/ true);
+        }
+        function getReferencedValueDeclaration(referenceIn) {
+            if (!ts.isGeneratedIdentifier(referenceIn)) {
+                var reference = ts.getParseTreeNode(referenceIn, ts.isIdentifier);
+                if (reference) {
+                    var symbol = getReferencedValueSymbol(reference);
+                    if (symbol) {
+                        return getExportSymbolOfValueSymbolIfExported(symbol).valueDeclaration;
+                    }
+                }
+            }
+            return undefined;
+        }
+        function isLiteralConstDeclaration(node) {
+            if (ts.isConst(node)) {
+                var type = getTypeOfSymbol(getSymbolOfNode(node));
+                return !!(type.flags & 192 /* StringOrNumberLiteral */ && type.flags & 33554432 /* FreshLiteral */);
+            }
+            return false;
+        }
+        function literalTypeToNode(type) {
+            return ts.createLiteral(type.value);
+        }
+        function createLiteralConstValue(node) {
+            var type = getTypeOfSymbol(getSymbolOfNode(node));
+            return literalTypeToNode(type);
+        }
+        function createResolver() {
+            // this variable and functions that use it are deliberately moved here from the outer scope
+            // to avoid scope pollution
+            var resolvedTypeReferenceDirectives = host.getResolvedTypeReferenceDirectives();
+            var fileToDirective;
+            if (resolvedTypeReferenceDirectives) {
+                // populate reverse mapping: file path -> type reference directive that was resolved to this file
+                fileToDirective = ts.createMap();
+                resolvedTypeReferenceDirectives.forEach(function (resolvedDirective, key) {
+                    if (!resolvedDirective || !resolvedDirective.resolvedFileName) {
+                        return;
+                    }
+                    var file = host.getSourceFile(resolvedDirective.resolvedFileName);
+                    fileToDirective.set(file.path, key);
+                });
+            }
+            return {
+                getReferencedExportContainer: getReferencedExportContainer,
+                getReferencedImportDeclaration: getReferencedImportDeclaration,
+                getReferencedDeclarationWithCollidingName: getReferencedDeclarationWithCollidingName,
+                isDeclarationWithCollidingName: isDeclarationWithCollidingName,
+                isValueAliasDeclaration: function (node) {
+                    node = ts.getParseTreeNode(node);
+                    // Synthesized nodes are always treated like values.
+                    return node ? isValueAliasDeclaration(node) : true;
+                },
+                hasGlobalName: hasGlobalName,
+                isReferencedAliasDeclaration: function (node, checkChildren) {
+                    node = ts.getParseTreeNode(node);
+                    // Synthesized nodes are always treated as referenced.
+                    return node ? isReferencedAliasDeclaration(node, checkChildren) : true;
+                },
+                getNodeCheckFlags: function (node) {
+                    node = ts.getParseTreeNode(node);
+                    return node ? getNodeCheckFlags(node) : 0;
+                },
+                isTopLevelValueImportEqualsWithEntityName: isTopLevelValueImportEqualsWithEntityName,
+                isDeclarationVisible: isDeclarationVisible,
+                isImplementationOfOverload: isImplementationOfOverload,
+                isRequiredInitializedParameter: isRequiredInitializedParameter,
+                isOptionalUninitializedParameterProperty: isOptionalUninitializedParameterProperty,
+                createTypeOfDeclaration: createTypeOfDeclaration,
+                createReturnTypeOfSignatureDeclaration: createReturnTypeOfSignatureDeclaration,
+                createTypeOfExpression: createTypeOfExpression,
+                createLiteralConstValue: createLiteralConstValue,
+                isSymbolAccessible: isSymbolAccessible,
+                isEntityNameVisible: isEntityNameVisible,
+                getConstantValue: function (nodeIn) {
+                    var node = ts.getParseTreeNode(nodeIn, canHaveConstantValue);
+                    return node ? getConstantValue(node) : undefined;
+                },
+                collectLinkedAliases: collectLinkedAliases,
+                getReferencedValueDeclaration: getReferencedValueDeclaration,
+                getTypeReferenceSerializationKind: getTypeReferenceSerializationKind,
+                isOptionalParameter: isOptionalParameter,
+                moduleExportsSomeValue: moduleExportsSomeValue,
+                isArgumentsLocalBinding: isArgumentsLocalBinding,
+                getExternalModuleFileFromDeclaration: getExternalModuleFileFromDeclaration,
+                getTypeReferenceDirectivesForEntityName: getTypeReferenceDirectivesForEntityName,
+                getTypeReferenceDirectivesForSymbol: getTypeReferenceDirectivesForSymbol,
+                isLiteralConstDeclaration: isLiteralConstDeclaration,
+                isLateBound: function (nodeIn) {
+                    var node = ts.getParseTreeNode(nodeIn, ts.isDeclaration);
+                    var symbol = node && getSymbolOfNode(node);
+                    return !!(symbol && ts.getCheckFlags(symbol) & 1024 /* Late */);
+                },
+                getJsxFactoryEntity: function (location) { return location ? (getJsxNamespace(location), (ts.getSourceFileOfNode(location).localJsxFactory || _jsxFactoryEntity)) : _jsxFactoryEntity; },
+                getAllAccessorDeclarations: function (accessor) {
+                    accessor = ts.getParseTreeNode(accessor, ts.isGetOrSetAccessorDeclaration); // TODO: GH#18217
+                    var otherKind = accessor.kind === 157 /* SetAccessor */ ? 156 /* GetAccessor */ : 157 /* SetAccessor */;
+                    var otherAccessor = ts.getDeclarationOfKind(getSymbolOfNode(accessor), otherKind);
+                    var firstAccessor = otherAccessor && (otherAccessor.pos < accessor.pos) ? otherAccessor : accessor;
+                    var secondAccessor = otherAccessor && (otherAccessor.pos < accessor.pos) ? accessor : otherAccessor;
+                    var setAccessor = accessor.kind === 157 /* SetAccessor */ ? accessor : otherAccessor;
+                    var getAccessor = accessor.kind === 156 /* GetAccessor */ ? accessor : otherAccessor;
+                    return {
+                        firstAccessor: firstAccessor,
+                        secondAccessor: secondAccessor,
+                        setAccessor: setAccessor,
+                        getAccessor: getAccessor
+                    };
+                }
+            };
+            function isInHeritageClause(node) {
+                return node.parent && node.parent.kind === 207 /* ExpressionWithTypeArguments */ && node.parent.parent && node.parent.parent.kind === 268 /* HeritageClause */;
+            }
+            // defined here to avoid outer scope pollution
+            function getTypeReferenceDirectivesForEntityName(node) {
+                // program does not have any files with type reference directives - bail out
+                if (!fileToDirective) {
+                    return undefined;
+                }
+                // property access can only be used as values, or types when within an expression with type arguments inside a heritage clause
+                // qualified names can only be used as types\namespaces
+                // identifiers are treated as values only if they appear in type queries
+                var meaning = 67901928 /* Type */ | 1920 /* Namespace */;
+                if ((node.kind === 71 /* Identifier */ && isInTypeQuery(node)) || (node.kind === 185 /* PropertyAccessExpression */ && !isInHeritageClause(node))) {
+                    meaning = 67216319 /* Value */ | 1048576 /* ExportValue */;
+                }
+                var symbol = resolveEntityName(node, meaning, /*ignoreErrors*/ true);
+                return symbol && symbol !== unknownSymbol ? getTypeReferenceDirectivesForSymbol(symbol, meaning) : undefined;
+            }
+            // defined here to avoid outer scope pollution
+            function getTypeReferenceDirectivesForSymbol(symbol, meaning) {
+                // program does not have any files with type reference directives - bail out
+                if (!fileToDirective) {
+                    return undefined;
+                }
+                if (!isSymbolFromTypeDeclarationFile(symbol)) {
+                    return undefined;
+                }
+                // check what declarations in the symbol can contribute to the target meaning
+                var typeReferenceDirectives;
+                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                    var decl = _a[_i];
+                    // check meaning of the local symbol to see if declaration needs to be analyzed further
+                    if (decl.symbol && decl.symbol.flags & meaning) {
+                        var file = ts.getSourceFileOfNode(decl);
+                        var typeReferenceDirective = fileToDirective.get(file.path);
+                        if (typeReferenceDirective) {
+                            (typeReferenceDirectives || (typeReferenceDirectives = [])).push(typeReferenceDirective);
+                        }
+                        else {
+                            // found at least one entry that does not originate from type reference directive
+                            return undefined;
+                        }
+                    }
+                }
+                return typeReferenceDirectives;
+            }
+            function isSymbolFromTypeDeclarationFile(symbol) {
+                // bail out if symbol does not have associated declarations (i.e. this is transient symbol created for property in binding pattern)
+                if (!symbol.declarations) {
+                    return false;
+                }
+                // walk the parent chain for symbols to make sure that top level parent symbol is in the global scope
+                // external modules cannot define or contribute to type declaration files
+                var current = symbol;
+                while (true) {
+                    var parent = getParentOfSymbol(current);
+                    if (parent) {
+                        current = parent;
+                    }
+                    else {
+                        break;
+                    }
+                }
+                if (current.valueDeclaration && current.valueDeclaration.kind === 274 /* SourceFile */ && current.flags & 512 /* ValueModule */) {
+                    return false;
+                }
+                // check that at least one declaration of top level symbol originates from type declaration file
+                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                    var decl = _a[_i];
+                    var file = ts.getSourceFileOfNode(decl);
+                    if (fileToDirective.has(file.path)) {
+                        return true;
+                    }
+                }
+                return false;
+            }
+        }
+        function getExternalModuleFileFromDeclaration(declaration) {
+            var specifier = declaration.kind === 239 /* ModuleDeclaration */ ? ts.tryCast(declaration.name, ts.isStringLiteral) : ts.getExternalModuleName(declaration);
+            var moduleSymbol = resolveExternalModuleNameWorker(specifier, specifier, /*moduleNotFoundError*/ undefined); // TODO: GH#18217
+            if (!moduleSymbol) {
+                return undefined;
+            }
+            return ts.getDeclarationOfKind(moduleSymbol, 274 /* SourceFile */);
+        }
+        function initializeTypeChecker() {
+            // Bind all source files and propagate errors
+            for (var _i = 0, _a = host.getSourceFiles(); _i < _a.length; _i++) {
+                var file = _a[_i];
+                ts.bindSourceFile(file, compilerOptions);
+            }
+            // Initialize global symbol table
+            var augmentations;
+            for (var _b = 0, _c = host.getSourceFiles(); _b < _c.length; _b++) {
+                var file = _c[_b];
+                if (!ts.isExternalOrCommonJsModule(file)) {
+                    mergeSymbolTable(globals, file.locals);
+                }
+                if (file.patternAmbientModules && file.patternAmbientModules.length) {
+                    patternAmbientModules = ts.concatenate(patternAmbientModules, file.patternAmbientModules);
+                }
+                if (file.moduleAugmentations.length) {
+                    (augmentations || (augmentations = [])).push(file.moduleAugmentations);
+                }
+                if (file.symbol && file.symbol.globalExports) {
+                    // Merge in UMD exports with first-in-wins semantics (see #9771)
+                    var source = file.symbol.globalExports;
+                    source.forEach(function (sourceSymbol, id) {
+                        if (!globals.has(id)) {
+                            globals.set(id, sourceSymbol);
+                        }
+                    });
+                }
+            }
+            // We do global augmentations separately from module augmentations (and before creating global types) because they
+            //  1. Affect global types. We won't have the correct global types until global augmentations are merged. Also,
+            //  2. Module augmentation instantiation requires creating the type of a module, which, in turn, can require
+            //       checking for an export or property on the module (if export=) which, in turn, can fall back to the
+            //       apparent type of the module - either globalObjectType or globalFunctionType - which wouldn't exist if we
+            //       did module augmentations prior to finalizing the global types.
+            if (augmentations) {
+                // merge _global_ module augmentations.
+                // this needs to be done after global symbol table is initialized to make sure that all ambient modules are indexed
+                for (var _d = 0, augmentations_1 = augmentations; _d < augmentations_1.length; _d++) {
+                    var list = augmentations_1[_d];
+                    for (var _e = 0, list_1 = list; _e < list_1.length; _e++) {
+                        var augmentation = list_1[_e];
+                        if (!ts.isGlobalScopeAugmentation(augmentation.parent))
+                            continue;
+                        mergeModuleAugmentation(augmentation);
+                    }
+                }
+            }
+            // Setup global builtins
+            addToSymbolTable(globals, builtinGlobals, ts.Diagnostics.Declaration_name_conflicts_with_built_in_global_identifier_0);
+            getSymbolLinks(undefinedSymbol).type = undefinedWideningType;
+            getSymbolLinks(argumentsSymbol).type = getGlobalType("IArguments", /*arity*/ 0, /*reportErrors*/ true);
+            getSymbolLinks(unknownSymbol).type = errorType;
+            // Initialize special types
+            globalArrayType = getGlobalType("Array", /*arity*/ 1, /*reportErrors*/ true);
+            globalObjectType = getGlobalType("Object", /*arity*/ 0, /*reportErrors*/ true);
+            globalFunctionType = getGlobalType("Function", /*arity*/ 0, /*reportErrors*/ true);
+            globalStringType = getGlobalType("String", /*arity*/ 0, /*reportErrors*/ true);
+            globalNumberType = getGlobalType("Number", /*arity*/ 0, /*reportErrors*/ true);
+            globalBooleanType = getGlobalType("Boolean", /*arity*/ 0, /*reportErrors*/ true);
+            globalRegExpType = getGlobalType("RegExp", /*arity*/ 0, /*reportErrors*/ true);
+            anyArrayType = createArrayType(anyType);
+            autoArrayType = createArrayType(autoType);
+            if (autoArrayType === emptyObjectType) {
+                // autoArrayType is used as a marker, so even if global Array type is not defined, it needs to be a unique type
+                autoArrayType = createAnonymousType(undefined, emptySymbols, ts.emptyArray, ts.emptyArray, undefined, undefined);
+            }
+            globalReadonlyArrayType = getGlobalTypeOrUndefined("ReadonlyArray", /*arity*/ 1);
+            anyReadonlyArrayType = globalReadonlyArrayType ? createTypeFromGenericGlobalType(globalReadonlyArrayType, [anyType]) : anyArrayType;
+            globalThisType = getGlobalTypeOrUndefined("ThisType", /*arity*/ 1);
+            if (augmentations) {
+                // merge _nonglobal_ module augmentations.
+                // this needs to be done after global symbol table is initialized to make sure that all ambient modules are indexed
+                for (var _f = 0, augmentations_2 = augmentations; _f < augmentations_2.length; _f++) {
+                    var list = augmentations_2[_f];
+                    for (var _g = 0, list_2 = list; _g < list_2.length; _g++) {
+                        var augmentation = list_2[_g];
+                        if (ts.isGlobalScopeAugmentation(augmentation.parent))
+                            continue;
+                        mergeModuleAugmentation(augmentation);
+                    }
+                }
+            }
+        }
+        function checkExternalEmitHelpers(location, helpers) {
+            if ((requestedExternalEmitHelpers & helpers) !== helpers && compilerOptions.importHelpers) {
+                var sourceFile = ts.getSourceFileOfNode(location);
+                if (ts.isEffectiveExternalModule(sourceFile, compilerOptions) && !(location.flags & 4194304 /* Ambient */)) {
+                    var helpersModule = resolveHelpersModule(sourceFile, location);
+                    if (helpersModule !== unknownSymbol) {
+                        var uncheckedHelpers = helpers & ~requestedExternalEmitHelpers;
+                        for (var helper = 1 /* FirstEmitHelper */; helper <= 65536 /* LastEmitHelper */; helper <<= 1) {
+                            if (uncheckedHelpers & helper) {
+                                var name = getHelperName(helper);
+                                var symbol = getSymbol(helpersModule.exports, ts.escapeLeadingUnderscores(name), 67216319 /* Value */);
+                                if (!symbol) {
+                                    error(location, ts.Diagnostics.This_syntax_requires_an_imported_helper_named_1_but_module_0_has_no_exported_member_1, ts.externalHelpersModuleNameText, name);
+                                }
+                            }
+                        }
+                    }
+                    requestedExternalEmitHelpers |= helpers;
+                }
+            }
+        }
+        function getHelperName(helper) {
+            switch (helper) {
+                case 1 /* Extends */: return "__extends";
+                case 2 /* Assign */: return "__assign";
+                case 4 /* Rest */: return "__rest";
+                case 8 /* Decorate */: return "__decorate";
+                case 16 /* Metadata */: return "__metadata";
+                case 32 /* Param */: return "__param";
+                case 64 /* Awaiter */: return "__awaiter";
+                case 128 /* Generator */: return "__generator";
+                case 256 /* Values */: return "__values";
+                case 512 /* Read */: return "__read";
+                case 1024 /* Spread */: return "__spread";
+                case 2048 /* Await */: return "__await";
+                case 4096 /* AsyncGenerator */: return "__asyncGenerator";
+                case 8192 /* AsyncDelegator */: return "__asyncDelegator";
+                case 16384 /* AsyncValues */: return "__asyncValues";
+                case 32768 /* ExportStar */: return "__exportStar";
+                case 65536 /* MakeTemplateObject */: return "__makeTemplateObject";
+                default: return ts.Debug.fail("Unrecognized helper");
+            }
+        }
+        function resolveHelpersModule(node, errorNode) {
+            if (!externalHelpersModule) {
+                externalHelpersModule = resolveExternalModule(node, ts.externalHelpersModuleNameText, ts.Diagnostics.This_syntax_requires_an_imported_helper_but_module_0_cannot_be_found, errorNode) || unknownSymbol;
+            }
+            return externalHelpersModule;
+        }
+        // GRAMMAR CHECKING
+        function checkGrammarDecoratorsAndModifiers(node) {
+            return checkGrammarDecorators(node) || checkGrammarModifiers(node);
+        }
+        function checkGrammarDecorators(node) {
+            if (!node.decorators) {
+                return false;
+            }
+            if (!ts.nodeCanBeDecorated(node, node.parent, node.parent.parent)) {
+                if (node.kind === 154 /* MethodDeclaration */ && !ts.nodeIsPresent(node.body)) {
+                    return grammarErrorOnFirstToken(node, ts.Diagnostics.A_decorator_can_only_decorate_a_method_implementation_not_an_overload);
+                }
+                else {
+                    return grammarErrorOnFirstToken(node, ts.Diagnostics.Decorators_are_not_valid_here);
+                }
+            }
+            else if (node.kind === 156 /* GetAccessor */ || node.kind === 157 /* SetAccessor */) {
+                var accessors = ts.getAllAccessorDeclarations(node.parent.members, node);
+                if (accessors.firstAccessor.decorators && node === accessors.secondAccessor) {
+                    return grammarErrorOnFirstToken(node, ts.Diagnostics.Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name);
+                }
+            }
+            return false;
+        }
+        function checkGrammarModifiers(node) {
+            var quickResult = reportObviousModifierErrors(node);
+            if (quickResult !== undefined) {
+                return quickResult;
+            }
+            var lastStatic, lastDeclare, lastAsync, lastReadonly;
+            var flags = 0 /* None */;
+            for (var _i = 0, _a = node.modifiers; _i < _a.length; _i++) {
+                var modifier = _a[_i];
+                if (modifier.kind !== 132 /* ReadonlyKeyword */) {
+                    if (node.kind === 151 /* PropertySignature */ || node.kind === 153 /* MethodSignature */) {
+                        return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_type_member, ts.tokenToString(modifier.kind));
+                    }
+                    if (node.kind === 160 /* IndexSignature */) {
+                        return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_an_index_signature, ts.tokenToString(modifier.kind));
+                    }
+                }
+                switch (modifier.kind) {
+                    case 76 /* ConstKeyword */:
+                        if (node.kind !== 238 /* EnumDeclaration */ && node.parent.kind === 235 /* ClassDeclaration */) {
+                            return grammarErrorOnNode(node, ts.Diagnostics.A_class_member_cannot_have_the_0_keyword, ts.tokenToString(76 /* ConstKeyword */));
+                        }
+                        break;
+                    case 114 /* PublicKeyword */:
+                    case 113 /* ProtectedKeyword */:
+                    case 112 /* PrivateKeyword */:
+                        var text = visibilityToString(ts.modifierToFlag(modifier.kind));
+                        if (flags & 28 /* AccessibilityModifier */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics.Accessibility_modifier_already_seen);
+                        }
+                        else if (flags & 32 /* Static */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "static");
+                        }
+                        else if (flags & 64 /* Readonly */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "readonly");
+                        }
+                        else if (flags & 256 /* Async */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "async");
+                        }
+                        else if (node.parent.kind === 240 /* ModuleBlock */ || node.parent.kind === 274 /* SourceFile */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_module_or_namespace_element, text);
+                        }
+                        else if (flags & 128 /* Abstract */) {
+                            if (modifier.kind === 112 /* PrivateKeyword */) {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, text, "abstract");
+                            }
+                            else {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "abstract");
+                            }
+                        }
+                        flags |= ts.modifierToFlag(modifier.kind);
+                        break;
+                    case 115 /* StaticKeyword */:
+                        if (flags & 32 /* Static */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "static");
+                        }
+                        else if (flags & 64 /* Readonly */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "static", "readonly");
+                        }
+                        else if (flags & 256 /* Async */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "static", "async");
+                        }
+                        else if (node.parent.kind === 240 /* ModuleBlock */ || node.parent.kind === 274 /* SourceFile */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_module_or_namespace_element, "static");
+                        }
+                        else if (node.kind === 149 /* Parameter */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "static");
+                        }
+                        else if (flags & 128 /* Abstract */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "static", "abstract");
+                        }
+                        flags |= 32 /* Static */;
+                        lastStatic = modifier;
+                        break;
+                    case 132 /* ReadonlyKeyword */:
+                        if (flags & 64 /* Readonly */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "readonly");
+                        }
+                        else if (node.kind !== 152 /* PropertyDeclaration */ && node.kind !== 151 /* PropertySignature */ && node.kind !== 160 /* IndexSignature */ && node.kind !== 149 /* Parameter */) {
+                            // If node.kind === SyntaxKind.Parameter, checkParameter report an error if it's not a parameter property.
+                            return grammarErrorOnNode(modifier, ts.Diagnostics.readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature);
+                        }
+                        flags |= 64 /* Readonly */;
+                        lastReadonly = modifier;
+                        break;
+                    case 84 /* ExportKeyword */:
+                        if (flags & 1 /* Export */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "export");
+                        }
+                        else if (flags & 2 /* Ambient */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "declare");
+                        }
+                        else if (flags & 128 /* Abstract */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "abstract");
+                        }
+                        else if (flags & 256 /* Async */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "async");
+                        }
+                        else if (node.parent.kind === 235 /* ClassDeclaration */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_class_element, "export");
+                        }
+                        else if (node.kind === 149 /* Parameter */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "export");
+                        }
+                        flags |= 1 /* Export */;
+                        break;
+                    case 79 /* DefaultKeyword */:
+                        var container = node.parent.kind === 274 /* SourceFile */ ? node.parent : node.parent.parent;
+                        if (container.kind === 239 /* ModuleDeclaration */ && !ts.isAmbientModule(container)) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics.A_default_export_can_only_be_used_in_an_ECMAScript_style_module);
+                        }
+                        flags |= 512 /* Default */;
+                        break;
+                    case 124 /* DeclareKeyword */:
+                        if (flags & 2 /* Ambient */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "declare");
+                        }
+                        else if (flags & 256 /* Async */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_in_an_ambient_context, "async");
+                        }
+                        else if (node.parent.kind === 235 /* ClassDeclaration */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_class_element, "declare");
+                        }
+                        else if (node.kind === 149 /* Parameter */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "declare");
+                        }
+                        else if ((node.parent.flags & 4194304 /* Ambient */) && node.parent.kind === 240 /* ModuleBlock */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics.A_declare_modifier_cannot_be_used_in_an_already_ambient_context);
+                        }
+                        flags |= 2 /* Ambient */;
+                        lastDeclare = modifier;
+                        break;
+                    case 117 /* AbstractKeyword */:
+                        if (flags & 128 /* Abstract */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "abstract");
+                        }
+                        if (node.kind !== 235 /* ClassDeclaration */) {
+                            if (node.kind !== 154 /* MethodDeclaration */ &&
+                                node.kind !== 152 /* PropertyDeclaration */ &&
+                                node.kind !== 156 /* GetAccessor */ &&
+                                node.kind !== 157 /* SetAccessor */) {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics.abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration);
+                            }
+                            if (!(node.parent.kind === 235 /* ClassDeclaration */ && ts.hasModifier(node.parent, 128 /* Abstract */))) {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics.Abstract_methods_can_only_appear_within_an_abstract_class);
+                            }
+                            if (flags & 32 /* Static */) {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "static", "abstract");
+                            }
+                            if (flags & 8 /* Private */) {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "private", "abstract");
+                            }
+                        }
+                        flags |= 128 /* Abstract */;
+                        break;
+                    case 120 /* AsyncKeyword */:
+                        if (flags & 256 /* Async */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "async");
+                        }
+                        else if (flags & 2 /* Ambient */ || node.parent.flags & 4194304 /* Ambient */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_in_an_ambient_context, "async");
+                        }
+                        else if (node.kind === 149 /* Parameter */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "async");
+                        }
+                        flags |= 256 /* Async */;
+                        lastAsync = modifier;
+                        break;
+                }
+            }
+            if (node.kind === 155 /* Constructor */) {
+                if (flags & 32 /* Static */) {
+                    return grammarErrorOnNode(lastStatic, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "static");
+                }
+                if (flags & 128 /* Abstract */) {
+                    return grammarErrorOnNode(lastStatic, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "abstract"); // TODO: GH#18217
+                }
+                else if (flags & 256 /* Async */) {
+                    return grammarErrorOnNode(lastAsync, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "async");
+                }
+                else if (flags & 64 /* Readonly */) {
+                    return grammarErrorOnNode(lastReadonly, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "readonly");
+                }
+                return false;
+            }
+            else if ((node.kind === 244 /* ImportDeclaration */ || node.kind === 243 /* ImportEqualsDeclaration */) && flags & 2 /* Ambient */) {
+                return grammarErrorOnNode(lastDeclare, ts.Diagnostics.A_0_modifier_cannot_be_used_with_an_import_declaration, "declare");
+            }
+            else if (node.kind === 149 /* Parameter */ && (flags & 92 /* ParameterPropertyModifier */) && ts.isBindingPattern(node.name)) {
+                return grammarErrorOnNode(node, ts.Diagnostics.A_parameter_property_may_not_be_declared_using_a_binding_pattern);
+            }
+            else if (node.kind === 149 /* Parameter */ && (flags & 92 /* ParameterPropertyModifier */) && node.dotDotDotToken) {
+                return grammarErrorOnNode(node, ts.Diagnostics.A_parameter_property_cannot_be_declared_using_a_rest_parameter);
+            }
+            if (flags & 256 /* Async */) {
+                return checkGrammarAsyncModifier(node, lastAsync);
+            }
+            return false;
+        }
+        /**
+         * true | false: Early return this value from checkGrammarModifiers.
+         * undefined: Need to do full checking on the modifiers.
+         */
+        function reportObviousModifierErrors(node) {
+            return !node.modifiers
+                ? false
+                : shouldReportBadModifier(node)
+                    ? grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here)
+                    : undefined;
+        }
+        function shouldReportBadModifier(node) {
+            switch (node.kind) {
+                case 156 /* GetAccessor */:
+                case 157 /* SetAccessor */:
+                case 155 /* Constructor */:
+                case 152 /* PropertyDeclaration */:
+                case 151 /* PropertySignature */:
+                case 154 /* MethodDeclaration */:
+                case 153 /* MethodSignature */:
+                case 160 /* IndexSignature */:
+                case 239 /* ModuleDeclaration */:
+                case 244 /* ImportDeclaration */:
+                case 243 /* ImportEqualsDeclaration */:
+                case 250 /* ExportDeclaration */:
+                case 249 /* ExportAssignment */:
+                case 192 /* FunctionExpression */:
+                case 193 /* ArrowFunction */:
+                case 149 /* Parameter */:
+                    return false;
+                default:
+                    if (node.parent.kind === 240 /* ModuleBlock */ || node.parent.kind === 274 /* SourceFile */) {
+                        return false;
+                    }
+                    switch (node.kind) {
+                        case 234 /* FunctionDeclaration */:
+                            return nodeHasAnyModifiersExcept(node, 120 /* AsyncKeyword */);
+                        case 235 /* ClassDeclaration */:
+                            return nodeHasAnyModifiersExcept(node, 117 /* AbstractKeyword */);
+                        case 236 /* InterfaceDeclaration */:
+                        case 214 /* VariableStatement */:
+                        case 237 /* TypeAliasDeclaration */:
+                            return true;
+                        case 238 /* EnumDeclaration */:
+                            return nodeHasAnyModifiersExcept(node, 76 /* ConstKeyword */);
+                        default:
+                            ts.Debug.fail();
+                            return false;
+                    }
+            }
+        }
+        function nodeHasAnyModifiersExcept(node, allowedModifier) {
+            return node.modifiers.length > 1 || node.modifiers[0].kind !== allowedModifier;
+        }
+        function checkGrammarAsyncModifier(node, asyncModifier) {
+            switch (node.kind) {
+                case 154 /* MethodDeclaration */:
+                case 234 /* FunctionDeclaration */:
+                case 192 /* FunctionExpression */:
+                case 193 /* ArrowFunction */:
+                    return false;
+            }
+            return grammarErrorOnNode(asyncModifier, ts.Diagnostics._0_modifier_cannot_be_used_here, "async");
+        }
+        function checkGrammarForDisallowedTrailingComma(list, diag) {
+            if (diag === void 0) { diag = ts.Diagnostics.Trailing_comma_not_allowed; }
+            if (list && list.hasTrailingComma) {
+                return grammarErrorAtPos(list[0], list.end - ",".length, ",".length, diag);
+            }
+            return false;
+        }
+        function checkGrammarTypeParameterList(typeParameters, file) {
+            if (typeParameters && typeParameters.length === 0) {
+                var start = typeParameters.pos - "<".length;
+                var end = ts.skipTrivia(file.text, typeParameters.end) + ">".length;
+                return grammarErrorAtPos(file, start, end - start, ts.Diagnostics.Type_parameter_list_cannot_be_empty);
+            }
+            return false;
+        }
+        function checkGrammarParameterList(parameters) {
+            var seenOptionalParameter = false;
+            var parameterCount = parameters.length;
+            for (var i = 0; i < parameterCount; i++) {
+                var parameter = parameters[i];
+                if (parameter.dotDotDotToken) {
+                    if (i !== (parameterCount - 1)) {
+                        return grammarErrorOnNode(parameter.dotDotDotToken, ts.Diagnostics.A_rest_parameter_must_be_last_in_a_parameter_list);
+                    }
+                    if (!(parameter.flags & 4194304 /* Ambient */)) { // Allow `...foo,` in ambient declarations; see GH#23070
+                        checkGrammarForDisallowedTrailingComma(parameters, ts.Diagnostics.A_rest_parameter_or_binding_pattern_may_not_have_a_trailing_comma);
+                    }
+                    if (ts.isBindingPattern(parameter.name)) {
+                        return grammarErrorOnNode(parameter.name, ts.Diagnostics.A_rest_element_cannot_contain_a_binding_pattern);
+                    }
+                    if (parameter.questionToken) {
+                        return grammarErrorOnNode(parameter.questionToken, ts.Diagnostics.A_rest_parameter_cannot_be_optional);
+                    }
+                    if (parameter.initializer) {
+                        return grammarErrorOnNode(parameter.name, ts.Diagnostics.A_rest_parameter_cannot_have_an_initializer);
+                    }
+                }
+                else if (parameter.questionToken) {
+                    seenOptionalParameter = true;
+                    if (parameter.initializer) {
+                        return grammarErrorOnNode(parameter.name, ts.Diagnostics.Parameter_cannot_have_question_mark_and_initializer);
+                    }
+                }
+                else if (seenOptionalParameter && !parameter.initializer) {
+                    return grammarErrorOnNode(parameter.name, ts.Diagnostics.A_required_parameter_cannot_follow_an_optional_parameter);
+                }
+            }
+        }
+        function checkGrammarFunctionLikeDeclaration(node) {
+            // Prevent cascading error by short-circuit
+            var file = ts.getSourceFileOfNode(node);
+            return checkGrammarDecoratorsAndModifiers(node) || checkGrammarTypeParameterList(node.typeParameters, file) ||
+                checkGrammarParameterList(node.parameters) || checkGrammarArrowFunction(node, file);
+        }
+        function checkGrammarClassLikeDeclaration(node) {
+            var file = ts.getSourceFileOfNode(node);
+            return checkGrammarClassDeclarationHeritageClauses(node) || checkGrammarTypeParameterList(node.typeParameters, file);
+        }
+        function checkGrammarArrowFunction(node, file) {
+            if (!ts.isArrowFunction(node)) {
+                return false;
+            }
+            var equalsGreaterThanToken = node.equalsGreaterThanToken;
+            var startLine = ts.getLineAndCharacterOfPosition(file, equalsGreaterThanToken.pos).line;
+            var endLine = ts.getLineAndCharacterOfPosition(file, equalsGreaterThanToken.end).line;
+            return startLine !== endLine && grammarErrorOnNode(equalsGreaterThanToken, ts.Diagnostics.Line_terminator_not_permitted_before_arrow);
+        }
+        function checkGrammarIndexSignatureParameters(node) {
+            var parameter = node.parameters[0];
+            if (node.parameters.length !== 1) {
+                if (parameter) {
+                    return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_must_have_exactly_one_parameter);
+                }
+                else {
+                    return grammarErrorOnNode(node, ts.Diagnostics.An_index_signature_must_have_exactly_one_parameter);
+                }
+            }
+            if (parameter.dotDotDotToken) {
+                return grammarErrorOnNode(parameter.dotDotDotToken, ts.Diagnostics.An_index_signature_cannot_have_a_rest_parameter);
+            }
+            if (ts.hasModifiers(parameter)) {
+                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_cannot_have_an_accessibility_modifier);
+            }
+            if (parameter.questionToken) {
+                return grammarErrorOnNode(parameter.questionToken, ts.Diagnostics.An_index_signature_parameter_cannot_have_a_question_mark);
+            }
+            if (parameter.initializer) {
+                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_cannot_have_an_initializer);
+            }
+            if (!parameter.type) {
+                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_must_have_a_type_annotation);
+            }
+            if (parameter.type.kind !== 137 /* StringKeyword */ && parameter.type.kind !== 134 /* NumberKeyword */) {
+                var type = getTypeFromTypeNode(parameter.type);
+                if (type.flags & 4 /* String */ || type.flags & 8 /* Number */) {
+                    return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_type_cannot_be_a_type_alias_Consider_writing_0_Colon_1_Colon_2_instead, ts.getTextOfNode(parameter.name), typeToString(type), typeToString(getTypeFromTypeNode(node.type)));
+                }
+                if (type.flags & 262144 /* Union */ && allTypesAssignableToKind(type, 64 /* StringLiteral */, /*strict*/ true)) {
+                    return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_type_cannot_be_a_union_type_Consider_using_a_mapped_object_type_instead);
+                }
+                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_type_must_be_string_or_number);
+            }
+            if (!node.type) {
+                return grammarErrorOnNode(node, ts.Diagnostics.An_index_signature_must_have_a_type_annotation);
+            }
+            return false;
+        }
+        function checkGrammarIndexSignature(node) {
+            // Prevent cascading error by short-circuit
+            return checkGrammarDecoratorsAndModifiers(node) || checkGrammarIndexSignatureParameters(node);
+        }
+        function checkGrammarForAtLeastOneTypeArgument(node, typeArguments) {
+            if (typeArguments && typeArguments.length === 0) {
+                var sourceFile = ts.getSourceFileOfNode(node);
+                var start = typeArguments.pos - "<".length;
+                var end = ts.skipTrivia(sourceFile.text, typeArguments.end) + ">".length;
+                return grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.Type_argument_list_cannot_be_empty);
+            }
+            return false;
+        }
+        function checkGrammarTypeArguments(node, typeArguments) {
+            return checkGrammarForDisallowedTrailingComma(typeArguments) ||
+                checkGrammarForAtLeastOneTypeArgument(node, typeArguments);
+        }
+        function checkGrammarForOmittedArgument(args) {
+            if (args) {
+                for (var _i = 0, args_5 = args; _i < args_5.length; _i++) {
+                    var arg = args_5[_i];
+                    if (arg.kind === 206 /* OmittedExpression */) {
+                        return grammarErrorAtPos(arg, arg.pos, 0, ts.Diagnostics.Argument_expression_expected);
+                    }
+                }
+            }
+            return false;
+        }
+        function checkGrammarArguments(args) {
+            return checkGrammarForOmittedArgument(args);
+        }
+        function checkGrammarHeritageClause(node) {
+            var types = node.types;
+            if (checkGrammarForDisallowedTrailingComma(types)) {
+                return true;
+            }
+            if (types && types.length === 0) {
+                var listType = ts.tokenToString(node.token);
+                return grammarErrorAtPos(node, types.pos, 0, ts.Diagnostics._0_list_cannot_be_empty, listType);
+            }
+            return ts.some(types, checkGrammarExpressionWithTypeArguments);
+        }
+        function checkGrammarExpressionWithTypeArguments(node) {
+            return checkGrammarTypeArguments(node, node.typeArguments);
+        }
+        function checkGrammarClassDeclarationHeritageClauses(node) {
+            var seenExtendsClause = false;
+            var seenImplementsClause = false;
+            if (!checkGrammarDecoratorsAndModifiers(node) && node.heritageClauses) {
+                for (var _i = 0, _a = node.heritageClauses; _i < _a.length; _i++) {
+                    var heritageClause = _a[_i];
+                    if (heritageClause.token === 85 /* ExtendsKeyword */) {
+                        if (seenExtendsClause) {
+                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.extends_clause_already_seen);
+                        }
+                        if (seenImplementsClause) {
+                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.extends_clause_must_precede_implements_clause);
+                        }
+                        if (heritageClause.types.length > 1) {
+                            return grammarErrorOnFirstToken(heritageClause.types[1], ts.Diagnostics.Classes_can_only_extend_a_single_class);
+                        }
+                        seenExtendsClause = true;
+                    }
+                    else {
+                        ts.Debug.assert(heritageClause.token === 108 /* ImplementsKeyword */);
+                        if (seenImplementsClause) {
+                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.implements_clause_already_seen);
+                        }
+                        seenImplementsClause = true;
+                    }
+                    // Grammar checking heritageClause inside class declaration
+                    checkGrammarHeritageClause(heritageClause);
+                }
+            }
+        }
+        function checkGrammarInterfaceDeclaration(node) {
+            var seenExtendsClause = false;
+            if (node.heritageClauses) {
+                for (var _i = 0, _a = node.heritageClauses; _i < _a.length; _i++) {
+                    var heritageClause = _a[_i];
+                    if (heritageClause.token === 85 /* ExtendsKeyword */) {
+                        if (seenExtendsClause) {
+                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.extends_clause_already_seen);
+                        }
+                        seenExtendsClause = true;
+                    }
+                    else {
+                        ts.Debug.assert(heritageClause.token === 108 /* ImplementsKeyword */);
+                        return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.Interface_declaration_cannot_have_implements_clause);
+                    }
+                    // Grammar checking heritageClause inside class declaration
+                    checkGrammarHeritageClause(heritageClause);
+                }
+            }
+            return false;
+        }
+        function checkGrammarComputedPropertyName(node) {
+            // If node is not a computedPropertyName, just skip the grammar checking
+            if (node.kind !== 147 /* ComputedPropertyName */) {
+                return false;
+            }
+            var computedPropertyName = node;
+            if (computedPropertyName.expression.kind === 200 /* BinaryExpression */ && computedPropertyName.expression.operatorToken.kind === 26 /* CommaToken */) {
+                return grammarErrorOnNode(computedPropertyName.expression, ts.Diagnostics.A_comma_expression_is_not_allowed_in_a_computed_property_name);
+            }
+            return false;
+        }
+        function checkGrammarForGenerator(node) {
+            if (node.asteriskToken) {
+                ts.Debug.assert(node.kind === 234 /* FunctionDeclaration */ ||
+                    node.kind === 192 /* FunctionExpression */ ||
+                    node.kind === 154 /* MethodDeclaration */);
+                if (node.flags & 4194304 /* Ambient */) {
+                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.Generators_are_not_allowed_in_an_ambient_context);
+                }
+                if (!node.body) {
+                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.An_overload_signature_cannot_be_declared_as_a_generator);
+                }
+            }
+        }
+        function checkGrammarForInvalidQuestionMark(questionToken, message) {
+            return !!questionToken && grammarErrorOnNode(questionToken, message);
+        }
+        function checkGrammarObjectLiteralExpression(node, inDestructuring) {
+            var Flags;
+            (function (Flags) {
+                Flags[Flags["Property"] = 1] = "Property";
+                Flags[Flags["GetAccessor"] = 2] = "GetAccessor";
+                Flags[Flags["SetAccessor"] = 4] = "SetAccessor";
+                Flags[Flags["GetOrSetAccessor"] = 6] = "GetOrSetAccessor";
+            })(Flags || (Flags = {}));
+            var seen = ts.createUnderscoreEscapedMap();
+            for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
+                var prop = _a[_i];
+                if (prop.kind === 272 /* SpreadAssignment */) {
+                    continue;
+                }
+                var name = prop.name;
+                if (name.kind === 147 /* ComputedPropertyName */) {
+                    // If the name is not a ComputedPropertyName, the grammar checking will skip it
+                    checkGrammarComputedPropertyName(name);
+                }
+                if (prop.kind === 271 /* ShorthandPropertyAssignment */ && !inDestructuring && prop.objectAssignmentInitializer) {
+                    // having objectAssignmentInitializer is only valid in ObjectAssignmentPattern
+                    // outside of destructuring it is a syntax error
+                    return grammarErrorOnNode(prop.equalsToken, ts.Diagnostics.can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment);
+                }
+                // Modifiers are never allowed on properties except for 'async' on a method declaration
+                if (prop.modifiers) {
+                    for (var _b = 0, _c = prop.modifiers; _b < _c.length; _b++) { // TODO: GH#19955
+                        var mod = _c[_b];
+                        if (mod.kind !== 120 /* AsyncKeyword */ || prop.kind !== 154 /* MethodDeclaration */) {
+                            grammarErrorOnNode(mod, ts.Diagnostics._0_modifier_cannot_be_used_here, ts.getTextOfNode(mod));
+                        }
+                    }
+                }
+                // ECMA-262 11.1.5 Object Initializer
+                // If previous is not undefined then throw a SyntaxError exception if any of the following conditions are true
+                // a.This production is contained in strict code and IsDataDescriptor(previous) is true and
+                // IsDataDescriptor(propId.descriptor) is true.
+                //    b.IsDataDescriptor(previous) is true and IsAccessorDescriptor(propId.descriptor) is true.
+                //    c.IsAccessorDescriptor(previous) is true and IsDataDescriptor(propId.descriptor) is true.
+                //    d.IsAccessorDescriptor(previous) is true and IsAccessorDescriptor(propId.descriptor) is true
+                // and either both previous and propId.descriptor have[[Get]] fields or both previous and propId.descriptor have[[Set]] fields
+                var currentKind = void 0;
+                switch (prop.kind) {
+                    case 270 /* PropertyAssignment */:
+                    case 271 /* ShorthandPropertyAssignment */:
+                        // Grammar checking for computedPropertyName and shorthandPropertyAssignment
+                        checkGrammarForInvalidQuestionMark(prop.questionToken, ts.Diagnostics.An_object_member_cannot_be_declared_optional);
+                        if (name.kind === 8 /* NumericLiteral */) {
+                            checkGrammarNumericLiteral(name);
+                        }
+                    // falls through
+                    case 154 /* MethodDeclaration */:
+                        currentKind = 1 /* Property */;
+                        break;
+                    case 156 /* GetAccessor */:
+                        currentKind = 2 /* GetAccessor */;
+                        break;
+                    case 157 /* SetAccessor */:
+                        currentKind = 4 /* SetAccessor */;
+                        break;
+                    default:
+                        throw ts.Debug.assertNever(prop, "Unexpected syntax kind:" + prop.kind);
+                }
+                var effectiveName = ts.getPropertyNameForPropertyNameNode(name);
+                if (effectiveName === undefined) {
+                    continue;
+                }
+                var existingKind = seen.get(effectiveName);
+                if (!existingKind) {
+                    seen.set(effectiveName, currentKind);
+                }
+                else {
+                    if (currentKind === 1 /* Property */ && existingKind === 1 /* Property */) {
+                        grammarErrorOnNode(name, ts.Diagnostics.Duplicate_identifier_0, ts.getTextOfNode(name));
+                    }
+                    else if ((currentKind & 6 /* GetOrSetAccessor */) && (existingKind & 6 /* GetOrSetAccessor */)) {
+                        if (existingKind !== 6 /* GetOrSetAccessor */ && currentKind !== existingKind) {
+                            seen.set(effectiveName, currentKind | existingKind);
+                        }
+                        else {
+                            return grammarErrorOnNode(name, ts.Diagnostics.An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name);
+                        }
+                    }
+                    else {
+                        return grammarErrorOnNode(name, ts.Diagnostics.An_object_literal_cannot_have_property_and_accessor_with_the_same_name);
+                    }
+                }
+            }
+        }
+        function checkGrammarJsxElement(node) {
+            checkGrammarTypeArguments(node, node.typeArguments);
+            var seen = ts.createUnderscoreEscapedMap();
+            for (var _i = 0, _a = node.attributes.properties; _i < _a.length; _i++) {
+                var attr = _a[_i];
+                if (attr.kind === 264 /* JsxSpreadAttribute */) {
+                    continue;
+                }
+                var name = attr.name, initializer = attr.initializer;
+                if (!seen.get(name.escapedText)) {
+                    seen.set(name.escapedText, true);
+                }
+                else {
+                    return grammarErrorOnNode(name, ts.Diagnostics.JSX_elements_cannot_have_multiple_attributes_with_the_same_name);
+                }
+                if (initializer && initializer.kind === 265 /* JsxExpression */ && !initializer.expression) {
+                    return grammarErrorOnNode(initializer, ts.Diagnostics.JSX_attributes_must_only_be_assigned_a_non_empty_expression);
+                }
+            }
+        }
+        function checkGrammarForInOrForOfStatement(forInOrOfStatement) {
+            if (checkGrammarStatementInAmbientContext(forInOrOfStatement)) {
+                return true;
+            }
+            if (forInOrOfStatement.kind === 222 /* ForOfStatement */ && forInOrOfStatement.awaitModifier) {
+                if ((forInOrOfStatement.flags & 16384 /* AwaitContext */) === 0 /* None */) {
+                    return grammarErrorOnNode(forInOrOfStatement.awaitModifier, ts.Diagnostics.A_for_await_of_statement_is_only_allowed_within_an_async_function_or_async_generator);
+                }
+            }
+            if (forInOrOfStatement.initializer.kind === 233 /* VariableDeclarationList */) {
+                var variableList = forInOrOfStatement.initializer;
+                if (!checkGrammarVariableDeclarationList(variableList)) {
+                    var declarations = variableList.declarations;
+                    // declarations.length can be zero if there is an error in variable declaration in for-of or for-in
+                    // See http://www.ecma-international.org/ecma-262/6.0/#sec-for-in-and-for-of-statements for details
+                    // For example:
+                    //      var let = 10;
+                    //      for (let of [1,2,3]) {} // this is invalid ES6 syntax
+                    //      for (let in [1,2,3]) {} // this is invalid ES6 syntax
+                    // We will then want to skip on grammar checking on variableList declaration
+                    if (!declarations.length) {
+                        return false;
+                    }
+                    if (declarations.length > 1) {
+                        var diagnostic = forInOrOfStatement.kind === 221 /* ForInStatement */
+                            ? ts.Diagnostics.Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement
+                            : ts.Diagnostics.Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement;
+                        return grammarErrorOnFirstToken(variableList.declarations[1], diagnostic);
+                    }
+                    var firstDeclaration = declarations[0];
+                    if (firstDeclaration.initializer) {
+                        var diagnostic = forInOrOfStatement.kind === 221 /* ForInStatement */
+                            ? ts.Diagnostics.The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer
+                            : ts.Diagnostics.The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer;
+                        return grammarErrorOnNode(firstDeclaration.name, diagnostic);
+                    }
+                    if (firstDeclaration.type) {
+                        var diagnostic = forInOrOfStatement.kind === 221 /* ForInStatement */
+                            ? ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation
+                            : ts.Diagnostics.The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation;
+                        return grammarErrorOnNode(firstDeclaration, diagnostic);
+                    }
+                }
+            }
+            return false;
+        }
+        function checkGrammarAccessor(accessor) {
+            var kind = accessor.kind;
+            if (languageVersion < 1 /* ES5 */) {
+                return grammarErrorOnNode(accessor.name, ts.Diagnostics.Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher);
+            }
+            else if (accessor.flags & 4194304 /* Ambient */) {
+                return grammarErrorOnNode(accessor.name, ts.Diagnostics.An_accessor_cannot_be_declared_in_an_ambient_context);
+            }
+            else if (accessor.body === undefined && !ts.hasModifier(accessor, 128 /* Abstract */)) {
+                return grammarErrorAtPos(accessor, accessor.end - 1, ";".length, ts.Diagnostics._0_expected, "{");
+            }
+            else if (accessor.body && ts.hasModifier(accessor, 128 /* Abstract */)) {
+                return grammarErrorOnNode(accessor, ts.Diagnostics.An_abstract_accessor_cannot_have_an_implementation);
+            }
+            else if (accessor.typeParameters) {
+                return grammarErrorOnNode(accessor.name, ts.Diagnostics.An_accessor_cannot_have_type_parameters);
+            }
+            else if (!doesAccessorHaveCorrectParameterCount(accessor)) {
+                return grammarErrorOnNode(accessor.name, kind === 156 /* GetAccessor */ ?
+                    ts.Diagnostics.A_get_accessor_cannot_have_parameters :
+                    ts.Diagnostics.A_set_accessor_must_have_exactly_one_parameter);
+            }
+            else if (kind === 157 /* SetAccessor */) {
+                if (accessor.type) {
+                    return grammarErrorOnNode(accessor.name, ts.Diagnostics.A_set_accessor_cannot_have_a_return_type_annotation);
+                }
+                else {
+                    var parameter = accessor.parameters[0];
+                    if (parameter.dotDotDotToken) {
+                        return grammarErrorOnNode(parameter.dotDotDotToken, ts.Diagnostics.A_set_accessor_cannot_have_rest_parameter);
+                    }
+                    else if (parameter.questionToken) {
+                        return grammarErrorOnNode(parameter.questionToken, ts.Diagnostics.A_set_accessor_cannot_have_an_optional_parameter);
+                    }
+                    else if (parameter.initializer) {
+                        return grammarErrorOnNode(accessor.name, ts.Diagnostics.A_set_accessor_parameter_cannot_have_an_initializer);
+                    }
+                }
+            }
+            return false;
+        }
+        /** Does the accessor have the right number of parameters?
+         * A get accessor has no parameters or a single `this` parameter.
+         * A set accessor has one parameter or a `this` parameter and one more parameter.
+         */
+        function doesAccessorHaveCorrectParameterCount(accessor) {
+            return getAccessorThisParameter(accessor) || accessor.parameters.length === (accessor.kind === 156 /* GetAccessor */ ? 0 : 1);
+        }
+        function getAccessorThisParameter(accessor) {
+            if (accessor.parameters.length === (accessor.kind === 156 /* GetAccessor */ ? 1 : 2)) {
+                return ts.getThisParameter(accessor);
+            }
+        }
+        function checkGrammarTypeOperatorNode(node) {
+            if (node.operator === 141 /* UniqueKeyword */) {
+                if (node.type.kind !== 138 /* SymbolKeyword */) {
+                    return grammarErrorOnNode(node.type, ts.Diagnostics._0_expected, ts.tokenToString(138 /* SymbolKeyword */));
+                }
+                var parent = ts.walkUpParenthesizedTypes(node.parent);
+                switch (parent.kind) {
+                    case 232 /* VariableDeclaration */:
+                        var decl = parent;
+                        if (decl.name.kind !== 71 /* Identifier */) {
+                            return grammarErrorOnNode(node, ts.Diagnostics.unique_symbol_types_may_not_be_used_on_a_variable_declaration_with_a_binding_name);
+                        }
+                        if (!ts.isVariableDeclarationInVariableStatement(decl)) {
+                            return grammarErrorOnNode(node, ts.Diagnostics.unique_symbol_types_are_only_allowed_on_variables_in_a_variable_statement);
+                        }
+                        if (!(decl.parent.flags & 2 /* Const */)) {
+                            return grammarErrorOnNode(parent.name, ts.Diagnostics.A_variable_whose_type_is_a_unique_symbol_type_must_be_const);
+                        }
+                        break;
+                    case 152 /* PropertyDeclaration */:
+                        if (!ts.hasModifier(parent, 32 /* Static */) ||
+                            !ts.hasModifier(parent, 64 /* Readonly */)) {
+                            return grammarErrorOnNode(parent.name, ts.Diagnostics.A_property_of_a_class_whose_type_is_a_unique_symbol_type_must_be_both_static_and_readonly);
+                        }
+                        break;
+                    case 151 /* PropertySignature */:
+                        if (!ts.hasModifier(parent, 64 /* Readonly */)) {
+                            return grammarErrorOnNode(parent.name, ts.Diagnostics.A_property_of_an_interface_or_type_literal_whose_type_is_a_unique_symbol_type_must_be_readonly);
+                        }
+                        break;
+                    default:
+                        return grammarErrorOnNode(node, ts.Diagnostics.unique_symbol_types_are_not_allowed_here);
+                }
+            }
+        }
+        function checkGrammarForInvalidDynamicName(node, message) {
+            if (isNonBindableDynamicName(node)) {
+                return grammarErrorOnNode(node, message);
+            }
+        }
+        function checkGrammarMethod(node) {
+            if (checkGrammarFunctionLikeDeclaration(node)) {
+                return true;
+            }
+            if (node.kind === 154 /* MethodDeclaration */) {
+                if (node.parent.kind === 184 /* ObjectLiteralExpression */) {
+                    // We only disallow modifier on a method declaration if it is a property of object-literal-expression
+                    if (node.modifiers && !(node.modifiers.length === 1 && ts.first(node.modifiers).kind === 120 /* AsyncKeyword */)) {
+                        return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
+                    }
+                    else if (checkGrammarForInvalidQuestionMark(node.questionToken, ts.Diagnostics.An_object_member_cannot_be_declared_optional)) {
+                        return true;
+                    }
+                    else if (node.body === undefined) {
+                        return grammarErrorAtPos(node, node.end - 1, ";".length, ts.Diagnostics._0_expected, "{");
+                    }
+                }
+                if (checkGrammarForGenerator(node)) {
+                    return true;
+                }
+            }
+            if (ts.isClassLike(node.parent)) {
+                // Technically, computed properties in ambient contexts is disallowed
+                // for property declarations and accessors too, not just methods.
+                // However, property declarations disallow computed names in general,
+                // and accessors are not allowed in ambient contexts in general,
+                // so this error only really matters for methods.
+                if (node.flags & 4194304 /* Ambient */) {
+                    return checkGrammarForInvalidDynamicName(node.name, ts.Diagnostics.A_computed_property_name_in_an_ambient_context_must_refer_to_an_expression_whose_type_is_a_literal_type_or_a_unique_symbol_type);
+                }
+                else if (node.kind === 154 /* MethodDeclaration */ && !node.body) {
+                    return checkGrammarForInvalidDynamicName(node.name, ts.Diagnostics.A_computed_property_name_in_a_method_overload_must_refer_to_an_expression_whose_type_is_a_literal_type_or_a_unique_symbol_type);
+                }
+            }
+            else if (node.parent.kind === 236 /* InterfaceDeclaration */) {
+                return checkGrammarForInvalidDynamicName(node.name, ts.Diagnostics.A_computed_property_name_in_an_interface_must_refer_to_an_expression_whose_type_is_a_literal_type_or_a_unique_symbol_type);
+            }
+            else if (node.parent.kind === 166 /* TypeLiteral */) {
+                return checkGrammarForInvalidDynamicName(node.name, ts.Diagnostics.A_computed_property_name_in_a_type_literal_must_refer_to_an_expression_whose_type_is_a_literal_type_or_a_unique_symbol_type);
+            }
+        }
+        function checkGrammarBreakOrContinueStatement(node) {
+            var current = node;
+            while (current) {
+                if (ts.isFunctionLike(current)) {
+                    return grammarErrorOnNode(node, ts.Diagnostics.Jump_target_cannot_cross_function_boundary);
+                }
+                switch (current.kind) {
+                    case 228 /* LabeledStatement */:
+                        if (node.label && current.label.escapedText === node.label.escapedText) {
+                            // found matching label - verify that label usage is correct
+                            // continue can only target labels that are on iteration statements
+                            var isMisplacedContinueLabel = node.kind === 223 /* ContinueStatement */
+                                && !ts.isIterationStatement(current.statement, /*lookInLabeledStatement*/ true);
+                            if (isMisplacedContinueLabel) {
+                                return grammarErrorOnNode(node, ts.Diagnostics.A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement);
+                            }
+                            return false;
+                        }
+                        break;
+                    case 227 /* SwitchStatement */:
+                        if (node.kind === 224 /* BreakStatement */ && !node.label) {
+                            // unlabeled break within switch statement - ok
+                            return false;
+                        }
+                        break;
+                    default:
+                        if (ts.isIterationStatement(current, /*lookInLabeledStatement*/ false) && !node.label) {
+                            // unlabeled break or continue within iteration statement - ok
+                            return false;
+                        }
+                        break;
+                }
+                current = current.parent;
+            }
+            if (node.label) {
+                var message = node.kind === 224 /* BreakStatement */
+                    ? ts.Diagnostics.A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement
+                    : ts.Diagnostics.A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement;
+                return grammarErrorOnNode(node, message);
+            }
+            else {
+                var message = node.kind === 224 /* BreakStatement */
+                    ? ts.Diagnostics.A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement
+                    : ts.Diagnostics.A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement;
+                return grammarErrorOnNode(node, message);
+            }
+        }
+        function checkGrammarBindingElement(node) {
+            if (node.dotDotDotToken) {
+                var elements = node.parent.elements;
+                if (node !== ts.last(elements)) {
+                    return grammarErrorOnNode(node, ts.Diagnostics.A_rest_element_must_be_last_in_a_destructuring_pattern);
+                }
+                checkGrammarForDisallowedTrailingComma(elements, ts.Diagnostics.A_rest_parameter_or_binding_pattern_may_not_have_a_trailing_comma);
+                if (node.name.kind === 181 /* ArrayBindingPattern */ || node.name.kind === 180 /* ObjectBindingPattern */) {
+                    return grammarErrorOnNode(node.name, ts.Diagnostics.A_rest_element_cannot_contain_a_binding_pattern);
+                }
+                if (node.propertyName) {
+                    return grammarErrorOnNode(node.name, ts.Diagnostics.A_rest_element_cannot_have_a_property_name);
+                }
+                if (node.initializer) {
+                    // Error on equals token which immediately precedes the initializer
+                    return grammarErrorAtPos(node, node.initializer.pos - 1, 1, ts.Diagnostics.A_rest_element_cannot_have_an_initializer);
+                }
+            }
+        }
+        function isStringOrNumberLiteralExpression(expr) {
+            return expr.kind === 9 /* StringLiteral */ || expr.kind === 8 /* NumericLiteral */ ||
+                expr.kind === 198 /* PrefixUnaryExpression */ && expr.operator === 38 /* MinusToken */ &&
+                    expr.operand.kind === 8 /* NumericLiteral */;
+        }
+        function checkGrammarVariableDeclaration(node) {
+            if (node.parent.parent.kind !== 221 /* ForInStatement */ && node.parent.parent.kind !== 222 /* ForOfStatement */) {
+                if (node.flags & 4194304 /* Ambient */) {
+                    if (node.initializer) {
+                        if (ts.isConst(node) && !node.type) {
+                            if (!isStringOrNumberLiteralExpression(node.initializer)) {
+                                return grammarErrorOnNode(node.initializer, ts.Diagnostics.A_const_initializer_in_an_ambient_context_must_be_a_string_or_numeric_literal);
+                            }
+                        }
+                        else {
+                            // Error on equals token which immediate precedes the initializer
+                            var equalsTokenLength = "=".length;
+                            return grammarErrorAtPos(node, node.initializer.pos - equalsTokenLength, equalsTokenLength, ts.Diagnostics.Initializers_are_not_allowed_in_ambient_contexts);
+                        }
+                    }
+                    if (node.initializer && !(ts.isConst(node) && isStringOrNumberLiteralExpression(node.initializer))) {
+                        // Error on equals token which immediate precedes the initializer
+                        var equalsTokenLength = "=".length;
+                        return grammarErrorAtPos(node, node.initializer.pos - equalsTokenLength, equalsTokenLength, ts.Diagnostics.Initializers_are_not_allowed_in_ambient_contexts);
+                    }
+                }
+                else if (!node.initializer) {
+                    if (ts.isBindingPattern(node.name) && !ts.isBindingPattern(node.parent)) {
+                        return grammarErrorOnNode(node, ts.Diagnostics.A_destructuring_declaration_must_have_an_initializer);
+                    }
+                    if (ts.isConst(node)) {
+                        return grammarErrorOnNode(node, ts.Diagnostics.const_declarations_must_be_initialized);
+                    }
+                }
+            }
+            if (node.exclamationToken && (node.parent.parent.kind !== 214 /* VariableStatement */ || !node.type || node.initializer || node.flags & 4194304 /* Ambient */)) {
+                return grammarErrorOnNode(node.exclamationToken, ts.Diagnostics.A_definite_assignment_assertion_is_not_permitted_in_this_context);
+            }
+            if (compilerOptions.module !== ts.ModuleKind.ES2015 && compilerOptions.module !== ts.ModuleKind.ESNext && compilerOptions.module !== ts.ModuleKind.System && !compilerOptions.noEmit &&
+                !(node.parent.parent.flags & 4194304 /* Ambient */) && ts.hasModifier(node.parent.parent, 1 /* Export */)) {
+                checkESModuleMarker(node.name);
+            }
+            var checkLetConstNames = (ts.isLet(node) || ts.isConst(node));
+            // 1. LexicalDeclaration : LetOrConst BindingList ;
+            // It is a Syntax Error if the BoundNames of BindingList contains "let".
+            // 2. ForDeclaration: ForDeclaration : LetOrConst ForBinding
+            // It is a Syntax Error if the BoundNames of ForDeclaration contains "let".
+            // It is a SyntaxError if a VariableDeclaration or VariableDeclarationNoIn occurs within strict code
+            // and its Identifier is eval or arguments
+            return checkLetConstNames && checkGrammarNameInLetOrConstDeclarations(node.name);
+        }
+        function checkESModuleMarker(name) {
+            if (name.kind === 71 /* Identifier */) {
+                if (ts.idText(name) === "__esModule") {
+                    return grammarErrorOnNode(name, ts.Diagnostics.Identifier_expected_esModule_is_reserved_as_an_exported_marker_when_transforming_ECMAScript_modules);
+                }
+            }
+            else {
+                var elements = name.elements;
+                for (var _i = 0, elements_1 = elements; _i < elements_1.length; _i++) {
+                    var element = elements_1[_i];
+                    if (!ts.isOmittedExpression(element)) {
+                        return checkESModuleMarker(element.name);
+                    }
+                }
+            }
+            return false;
+        }
+        function checkGrammarNameInLetOrConstDeclarations(name) {
+            if (name.kind === 71 /* Identifier */) {
+                if (name.originalKeywordKind === 110 /* LetKeyword */) {
+                    return grammarErrorOnNode(name, ts.Diagnostics.let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations);
+                }
+            }
+            else {
+                var elements = name.elements;
+                for (var _i = 0, elements_2 = elements; _i < elements_2.length; _i++) {
+                    var element = elements_2[_i];
+                    if (!ts.isOmittedExpression(element)) {
+                        checkGrammarNameInLetOrConstDeclarations(element.name);
+                    }
+                }
+            }
+            return false;
+        }
+        function checkGrammarVariableDeclarationList(declarationList) {
+            var declarations = declarationList.declarations;
+            if (checkGrammarForDisallowedTrailingComma(declarationList.declarations)) {
+                return true;
+            }
+            if (!declarationList.declarations.length) {
+                return grammarErrorAtPos(declarationList, declarations.pos, declarations.end - declarations.pos, ts.Diagnostics.Variable_declaration_list_cannot_be_empty);
+            }
+            return false;
+        }
+        function allowLetAndConstDeclarations(parent) {
+            switch (parent.kind) {
+                case 217 /* IfStatement */:
+                case 218 /* DoStatement */:
+                case 219 /* WhileStatement */:
+                case 226 /* WithStatement */:
+                case 220 /* ForStatement */:
+                case 221 /* ForInStatement */:
+                case 222 /* ForOfStatement */:
+                    return false;
+                case 228 /* LabeledStatement */:
+                    return allowLetAndConstDeclarations(parent.parent);
+            }
+            return true;
+        }
+        function checkGrammarForDisallowedLetOrConstStatement(node) {
+            if (!allowLetAndConstDeclarations(node.parent)) {
+                if (ts.isLet(node.declarationList)) {
+                    return grammarErrorOnNode(node, ts.Diagnostics.let_declarations_can_only_be_declared_inside_a_block);
+                }
+                else if (ts.isConst(node.declarationList)) {
+                    return grammarErrorOnNode(node, ts.Diagnostics.const_declarations_can_only_be_declared_inside_a_block);
+                }
+            }
+        }
+        function checkGrammarMetaProperty(node) {
+            var escapedText = node.name.escapedText;
+            switch (node.keywordToken) {
+                case 94 /* NewKeyword */:
+                    if (escapedText !== "target") {
+                        return grammarErrorOnNode(node.name, ts.Diagnostics._0_is_not_a_valid_meta_property_for_keyword_1_Did_you_mean_2, node.name.escapedText, ts.tokenToString(node.keywordToken), "target");
+                    }
+                    break;
+                case 91 /* ImportKeyword */:
+                    if (escapedText !== "meta") {
+                        return grammarErrorOnNode(node.name, ts.Diagnostics._0_is_not_a_valid_meta_property_for_keyword_1_Did_you_mean_2, node.name.escapedText, ts.tokenToString(node.keywordToken), "meta");
+                    }
+                    break;
+            }
+        }
+        function hasParseDiagnostics(sourceFile) {
+            return sourceFile.parseDiagnostics.length > 0;
+        }
+        function grammarErrorOnFirstToken(node, message, arg0, arg1, arg2) {
+            var sourceFile = ts.getSourceFileOfNode(node);
+            if (!hasParseDiagnostics(sourceFile)) {
+                var span = ts.getSpanOfTokenAtPosition(sourceFile, node.pos);
+                diagnostics.add(ts.createFileDiagnostic(sourceFile, span.start, span.length, message, arg0, arg1, arg2));
+                return true;
+            }
+            return false;
+        }
+        function grammarErrorAtPos(nodeForSourceFile, start, length, message, arg0, arg1, arg2) {
+            var sourceFile = ts.getSourceFileOfNode(nodeForSourceFile);
+            if (!hasParseDiagnostics(sourceFile)) {
+                diagnostics.add(ts.createFileDiagnostic(sourceFile, start, length, message, arg0, arg1, arg2));
+                return true;
+            }
+            return false;
+        }
+        function grammarErrorOnNode(node, message, arg0, arg1, arg2) {
+            var sourceFile = ts.getSourceFileOfNode(node);
+            if (!hasParseDiagnostics(sourceFile)) {
+                diagnostics.add(ts.createDiagnosticForNode(node, message, arg0, arg1, arg2));
+                return true;
+            }
+            return false;
+        }
+        function checkGrammarConstructorTypeParameters(node) {
+            var jsdocTypeParameters = ts.isInJavaScriptFile(node) && ts.getJSDocTypeParameterDeclarations(node);
+            if (node.typeParameters || jsdocTypeParameters && jsdocTypeParameters.length) {
+                var _a = node.typeParameters || jsdocTypeParameters && jsdocTypeParameters[0] || node, pos = _a.pos, end = _a.end;
+                return grammarErrorAtPos(node, pos, end - pos, ts.Diagnostics.Type_parameters_cannot_appear_on_a_constructor_declaration);
+            }
+        }
+        function checkGrammarConstructorTypeAnnotation(node) {
+            var type = ts.getEffectiveReturnTypeNode(node);
+            if (type) {
+                return grammarErrorOnNode(type, ts.Diagnostics.Type_annotation_cannot_appear_on_a_constructor_declaration);
+            }
+        }
+        function checkGrammarProperty(node) {
+            if (ts.isClassLike(node.parent)) {
+                if (checkGrammarForInvalidDynamicName(node.name, ts.Diagnostics.A_computed_property_name_in_a_class_property_declaration_must_refer_to_an_expression_whose_type_is_a_literal_type_or_a_unique_symbol_type)) {
+                    return true;
+                }
+            }
+            else if (node.parent.kind === 236 /* InterfaceDeclaration */) {
+                if (checkGrammarForInvalidDynamicName(node.name, ts.Diagnostics.A_computed_property_name_in_an_interface_must_refer_to_an_expression_whose_type_is_a_literal_type_or_a_unique_symbol_type)) {
+                    return true;
+                }
+                if (node.initializer) {
+                    return grammarErrorOnNode(node.initializer, ts.Diagnostics.An_interface_property_cannot_have_an_initializer);
+                }
+            }
+            else if (node.parent.kind === 166 /* TypeLiteral */) {
+                if (checkGrammarForInvalidDynamicName(node.name, ts.Diagnostics.A_computed_property_name_in_a_type_literal_must_refer_to_an_expression_whose_type_is_a_literal_type_or_a_unique_symbol_type)) {
+                    return true;
+                }
+                if (node.initializer) {
+                    return grammarErrorOnNode(node.initializer, ts.Diagnostics.A_type_literal_property_cannot_have_an_initializer);
+                }
+            }
+            if (node.flags & 4194304 /* Ambient */ && node.initializer) {
+                return grammarErrorOnFirstToken(node.initializer, ts.Diagnostics.Initializers_are_not_allowed_in_ambient_contexts);
+            }
+            if (ts.isPropertyDeclaration(node) && node.exclamationToken && (!ts.isClassLike(node.parent) || !node.type || node.initializer ||
+                node.flags & 4194304 /* Ambient */ || ts.hasModifier(node, 32 /* Static */ | 128 /* Abstract */))) {
+                return grammarErrorOnNode(node.exclamationToken, ts.Diagnostics.A_definite_assignment_assertion_is_not_permitted_in_this_context);
+            }
+        }
+        function checkGrammarTopLevelElementForRequiredDeclareModifier(node) {
+            // A declare modifier is required for any top level .d.ts declaration except export=, export default, export as namespace
+            // interfaces and imports categories:
+            //
+            //  DeclarationElement:
+            //     ExportAssignment
+            //     export_opt   InterfaceDeclaration
+            //     export_opt   TypeAliasDeclaration
+            //     export_opt   ImportDeclaration
+            //     export_opt   ExternalImportDeclaration
+            //     export_opt   AmbientDeclaration
+            //
+            // TODO: The spec needs to be amended to reflect this grammar.
+            if (node.kind === 236 /* InterfaceDeclaration */ ||
+                node.kind === 237 /* TypeAliasDeclaration */ ||
+                node.kind === 244 /* ImportDeclaration */ ||
+                node.kind === 243 /* ImportEqualsDeclaration */ ||
+                node.kind === 250 /* ExportDeclaration */ ||
+                node.kind === 249 /* ExportAssignment */ ||
+                node.kind === 242 /* NamespaceExportDeclaration */ ||
+                ts.hasModifier(node, 2 /* Ambient */ | 1 /* Export */ | 512 /* Default */)) {
+                return false;
+            }
+            return grammarErrorOnFirstToken(node, ts.Diagnostics.A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file);
+        }
+        function checkGrammarTopLevelElementsForRequiredDeclareModifier(file) {
+            for (var _i = 0, _a = file.statements; _i < _a.length; _i++) {
+                var decl = _a[_i];
+                if (ts.isDeclaration(decl) || decl.kind === 214 /* VariableStatement */) {
+                    if (checkGrammarTopLevelElementForRequiredDeclareModifier(decl)) {
+                        return true;
+                    }
+                }
+            }
+            return false;
+        }
+        function checkGrammarSourceFile(node) {
+            return !!(node.flags & 4194304 /* Ambient */) && checkGrammarTopLevelElementsForRequiredDeclareModifier(node);
+        }
+        function checkGrammarStatementInAmbientContext(node) {
+            if (node.flags & 4194304 /* Ambient */) {
+                // An accessors is already reported about the ambient context
+                if (ts.isAccessor(node.parent)) {
+                    return getNodeLinks(node).hasReportedStatementInAmbientContext = true;
+                }
+                // Find containing block which is either Block, ModuleBlock, SourceFile
+                var links = getNodeLinks(node);
+                if (!links.hasReportedStatementInAmbientContext && ts.isFunctionLike(node.parent)) {
+                    return getNodeLinks(node).hasReportedStatementInAmbientContext = grammarErrorOnFirstToken(node, ts.Diagnostics.An_implementation_cannot_be_declared_in_ambient_contexts);
+                }
+                // We are either parented by another statement, or some sort of block.
+                // If we're in a block, we only want to really report an error once
+                // to prevent noisiness.  So use a bit on the block to indicate if
+                // this has already been reported, and don't report if it has.
+                //
+                if (node.parent.kind === 213 /* Block */ || node.parent.kind === 240 /* ModuleBlock */ || node.parent.kind === 274 /* SourceFile */) {
+                    var links_1 = getNodeLinks(node.parent);
+                    // Check if the containing block ever report this error
+                    if (!links_1.hasReportedStatementInAmbientContext) {
+                        return links_1.hasReportedStatementInAmbientContext = grammarErrorOnFirstToken(node, ts.Diagnostics.Statements_are_not_allowed_in_ambient_contexts);
+                    }
+                }
+                else {
+                    // We must be parented by a statement.  If so, there's no need
+                    // to report the error as our parent will have already done it.
+                    // Debug.assert(isStatement(node.parent));
+                }
+            }
+            return false;
+        }
+        function checkGrammarNumericLiteral(node) {
+            // Grammar checking
+            if (node.numericLiteralFlags & 32 /* Octal */) {
+                var diagnosticMessage = void 0;
+                if (languageVersion >= 1 /* ES5 */) {
+                    diagnosticMessage = ts.Diagnostics.Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher_Use_the_syntax_0;
+                }
+                else if (ts.isChildOfNodeWithKind(node, 178 /* LiteralType */)) {
+                    diagnosticMessage = ts.Diagnostics.Octal_literal_types_must_use_ES2015_syntax_Use_the_syntax_0;
+                }
+                else if (ts.isChildOfNodeWithKind(node, 273 /* EnumMember */)) {
+                    diagnosticMessage = ts.Diagnostics.Octal_literals_are_not_allowed_in_enums_members_initializer_Use_the_syntax_0;
+                }
+                if (diagnosticMessage) {
+                    var withMinus = ts.isPrefixUnaryExpression(node.parent) && node.parent.operator === 38 /* MinusToken */;
+                    var literal = (withMinus ? "-" : "") + "0o" + node.text;
+                    return grammarErrorOnNode(withMinus ? node.parent : node, diagnosticMessage, literal);
+                }
+            }
+            return false;
+        }
+        function grammarErrorAfterFirstToken(node, message, arg0, arg1, arg2) {
+            var sourceFile = ts.getSourceFileOfNode(node);
+            if (!hasParseDiagnostics(sourceFile)) {
+                var span = ts.getSpanOfTokenAtPosition(sourceFile, node.pos);
+                diagnostics.add(ts.createFileDiagnostic(sourceFile, ts.textSpanEnd(span), /*length*/ 0, message, arg0, arg1, arg2));
+                return true;
+            }
+            return false;
+        }
+        function getAmbientModules() {
+            if (!ambientModulesCache) {
+                ambientModulesCache = [];
+                globals.forEach(function (global, sym) {
+                    // No need to `unescapeLeadingUnderscores`, an escaped symbol is never an ambient module.
+                    if (ambientModuleSymbolRegex.test(sym)) {
+                        ambientModulesCache.push(global);
+                    }
+                });
+            }
+            return ambientModulesCache;
+        }
+        function checkGrammarImportCallExpression(node) {
+            if (moduleKind === ts.ModuleKind.ES2015) {
+                return grammarErrorOnNode(node, ts.Diagnostics.Dynamic_import_is_only_supported_when_module_flag_is_commonjs_or_esNext);
+            }
+            if (node.typeArguments) {
+                return grammarErrorOnNode(node, ts.Diagnostics.Dynamic_import_cannot_have_type_arguments);
+            }
+            var nodeArguments = node.arguments;
+            if (nodeArguments.length !== 1) {
+                return grammarErrorOnNode(node, ts.Diagnostics.Dynamic_import_must_have_one_specifier_as_an_argument);
+            }
+            // see: parseArgumentOrArrayLiteralElement...we use this function which parse arguments of callExpression to parse specifier for dynamic import.
+            // parseArgumentOrArrayLiteralElement allows spread element to be in an argument list which is not allowed as specifier in dynamic import.
+            if (ts.isSpreadElement(nodeArguments[0])) {
+                return grammarErrorOnNode(nodeArguments[0], ts.Diagnostics.Specifier_of_dynamic_import_cannot_be_spread_element);
+            }
+            return false;
+        }
+    }
+    ts.createTypeChecker = createTypeChecker;
+    /** Like 'isDeclarationName', but returns true for LHS of `import { x as y }` or `export { x as y }`. */
+    function isDeclarationNameOrImportPropertyName(name) {
+        switch (name.parent.kind) {
+            case 248 /* ImportSpecifier */:
+            case 252 /* ExportSpecifier */:
+                return ts.isIdentifier(name);
+            default:
+                return ts.isDeclarationName(name);
+        }
+    }
+    function isSomeImportDeclaration(decl) {
+        switch (decl.kind) {
+            case 245 /* ImportClause */: // For default import
+            case 243 /* ImportEqualsDeclaration */:
+            case 246 /* NamespaceImport */:
+            case 248 /* ImportSpecifier */: // For rename import `x as y`
+                return true;
+            case 71 /* Identifier */:
+                // For regular import, `decl` is an Identifier under the ImportSpecifier.
+                return decl.parent.kind === 248 /* ImportSpecifier */;
+            default:
+                return false;
+        }
+    }
+    var JsxNames;
+    (function (JsxNames) {
+        // tslint:disable variable-name
+        JsxNames.JSX = "JSX";
+        JsxNames.IntrinsicElements = "IntrinsicElements";
+        JsxNames.ElementClass = "ElementClass";
+        JsxNames.ElementAttributesPropertyNameContainer = "ElementAttributesProperty"; // TODO: Deprecate and remove support
+        JsxNames.ElementChildrenAttributeNameContainer = "ElementChildrenAttribute";
+        JsxNames.Element = "Element";
+        JsxNames.IntrinsicAttributes = "IntrinsicAttributes";
+        JsxNames.IntrinsicClassAttributes = "IntrinsicClassAttributes";
+        // tslint:enable variable-name
+    })(JsxNames || (JsxNames = {}));
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    function createSynthesizedNode(kind) {
+        var node = ts.createNode(kind, -1, -1);
+        node.flags |= 8 /* Synthesized */;
+        return node;
+    }
+    /* @internal */
+    function updateNode(updated, original) {
+        if (updated !== original) {
+            setOriginalNode(updated, original);
+            setTextRange(updated, original);
+            ts.aggregateTransformFlags(updated);
+        }
+        return updated;
+    }
+    ts.updateNode = updateNode;
+    /**
+     * Make `elements` into a `NodeArray<T>`. If `elements` is `undefined`, returns an empty `NodeArray<T>`.
+     */
+    function createNodeArray(elements, hasTrailingComma) {
+        if (!elements || elements === ts.emptyArray) {
+            elements = [];
+        }
+        else if (ts.isNodeArray(elements)) {
+            return elements;
+        }
+        var array = elements;
+        array.pos = -1;
+        array.end = -1;
+        array.hasTrailingComma = hasTrailingComma;
+        return array;
+    }
+    ts.createNodeArray = createNodeArray;
+    /**
+     * Creates a shallow, memberwise clone of a node with no source map location.
+     */
+    /* @internal */
+    function getSynthesizedClone(node) {
+        // We don't use "clone" from core.ts here, as we need to preserve the prototype chain of
+        // the original node. We also need to exclude specific properties and only include own-
+        // properties (to skip members already defined on the shared prototype).
+        if (node === undefined) {
+            return node;
+        }
+        var clone = createSynthesizedNode(node.kind);
+        clone.flags |= node.flags;
+        setOriginalNode(clone, node);
+        for (var key in node) {
+            if (clone.hasOwnProperty(key) || !node.hasOwnProperty(key)) {
+                continue;
+            }
+            clone[key] = node[key];
+        }
+        return clone;
+    }
+    ts.getSynthesizedClone = getSynthesizedClone;
+    function createLiteral(value, isSingleQuote) {
+        if (typeof value === "number") {
+            return createNumericLiteral(value + "");
+        }
+        if (typeof value === "boolean") {
+            return value ? createTrue() : createFalse();
+        }
+        if (ts.isString(value)) {
+            var res = createStringLiteral(value);
+            if (isSingleQuote)
+                res.singleQuote = true;
+            return res;
+        }
+        return createLiteralFromNode(value);
+    }
+    ts.createLiteral = createLiteral;
+    function createNumericLiteral(value) {
+        var node = createSynthesizedNode(8 /* NumericLiteral */);
+        node.text = value;
+        node.numericLiteralFlags = 0;
+        return node;
+    }
+    ts.createNumericLiteral = createNumericLiteral;
+    function createStringLiteral(text) {
+        var node = createSynthesizedNode(9 /* StringLiteral */);
+        node.text = text;
+        return node;
+    }
+    ts.createStringLiteral = createStringLiteral;
+    function createRegularExpressionLiteral(text) {
+        var node = createSynthesizedNode(12 /* RegularExpressionLiteral */);
+        node.text = text;
+        return node;
+    }
+    ts.createRegularExpressionLiteral = createRegularExpressionLiteral;
+    function createLiteralFromNode(sourceNode) {
+        var node = createStringLiteral(ts.getTextOfIdentifierOrLiteral(sourceNode));
+        node.textSourceNode = sourceNode;
+        return node;
+    }
+    function createIdentifier(text, typeArguments) {
+        var node = createSynthesizedNode(71 /* Identifier */);
+        node.escapedText = ts.escapeLeadingUnderscores(text);
+        node.originalKeywordKind = text ? ts.stringToToken(text) : 0 /* Unknown */;
+        node.autoGenerateFlags = 0 /* None */;
+        node.autoGenerateId = 0;
+        if (typeArguments) {
+            node.typeArguments = createNodeArray(typeArguments);
+        }
+        return node;
+    }
+    ts.createIdentifier = createIdentifier;
+    function updateIdentifier(node, typeArguments) {
+        return node.typeArguments !== typeArguments
+            ? updateNode(createIdentifier(ts.idText(node), typeArguments), node)
+            : node;
+    }
+    ts.updateIdentifier = updateIdentifier;
+    var nextAutoGenerateId = 0;
+    function createTempVariable(recordTempVariable, reservedInNestedScopes) {
+        var name = createIdentifier("");
+        name.autoGenerateFlags = 1 /* Auto */;
+        name.autoGenerateId = nextAutoGenerateId;
+        nextAutoGenerateId++;
+        if (recordTempVariable) {
+            recordTempVariable(name);
+        }
+        if (reservedInNestedScopes) {
+            name.autoGenerateFlags |= 8 /* ReservedInNestedScopes */;
+        }
+        return name;
+    }
+    ts.createTempVariable = createTempVariable;
+    /** Create a unique temporary variable for use in a loop. */
+    function createLoopVariable() {
+        var name = createIdentifier("");
+        name.autoGenerateFlags = 2 /* Loop */;
+        name.autoGenerateId = nextAutoGenerateId;
+        nextAutoGenerateId++;
+        return name;
+    }
+    ts.createLoopVariable = createLoopVariable;
+    /** Create a unique name based on the supplied text. */
+    function createUniqueName(text) {
+        var name = createIdentifier(text);
+        name.autoGenerateFlags = 3 /* Unique */;
+        name.autoGenerateId = nextAutoGenerateId;
+        nextAutoGenerateId++;
+        return name;
+    }
+    ts.createUniqueName = createUniqueName;
+    function createOptimisticUniqueName(text) {
+        var name = createIdentifier(text);
+        name.autoGenerateFlags = 3 /* Unique */ | 16 /* Optimistic */;
+        name.autoGenerateId = nextAutoGenerateId;
+        nextAutoGenerateId++;
+        return name;
+    }
+    ts.createOptimisticUniqueName = createOptimisticUniqueName;
+    /** Create a unique name based on the supplied text. This does not consider names injected by the transformer. */
+    function createFileLevelUniqueName(text) {
+        var name = createOptimisticUniqueName(text);
+        name.autoGenerateFlags |= 32 /* FileLevel */;
+        return name;
+    }
+    ts.createFileLevelUniqueName = createFileLevelUniqueName;
+    function getGeneratedNameForNode(node, flags) {
+        var name = createIdentifier(ts.isIdentifier(node) ? ts.idText(node) : "");
+        name.autoGenerateFlags = 4 /* Node */ | flags;
+        name.autoGenerateId = nextAutoGenerateId;
+        name.original = node;
+        nextAutoGenerateId++;
+        return name;
+    }
+    ts.getGeneratedNameForNode = getGeneratedNameForNode;
+    // Punctuation
+    function createToken(token) {
+        return createSynthesizedNode(token);
+    }
+    ts.createToken = createToken;
+    // Reserved words
+    function createSuper() {
+        return createSynthesizedNode(97 /* SuperKeyword */);
+    }
+    ts.createSuper = createSuper;
+    function createThis() {
+        return createSynthesizedNode(99 /* ThisKeyword */);
+    }
+    ts.createThis = createThis;
+    function createNull() {
+        return createSynthesizedNode(95 /* NullKeyword */);
+    }
+    ts.createNull = createNull;
+    function createTrue() {
+        return createSynthesizedNode(101 /* TrueKeyword */);
+    }
+    ts.createTrue = createTrue;
+    function createFalse() {
+        return createSynthesizedNode(86 /* FalseKeyword */);
+    }
+    ts.createFalse = createFalse;
+    // Modifiers
+    function createModifier(kind) {
+        return createToken(kind);
+    }
+    ts.createModifier = createModifier;
+    function createModifiersFromModifierFlags(flags) {
+        var result = [];
+        if (flags & 1 /* Export */) {
+            result.push(createModifier(84 /* ExportKeyword */));
+        }
+        if (flags & 2 /* Ambient */) {
+            result.push(createModifier(124 /* DeclareKeyword */));
+        }
+        if (flags & 512 /* Default */) {
+            result.push(createModifier(79 /* DefaultKeyword */));
+        }
+        if (flags & 2048 /* Const */) {
+            result.push(createModifier(76 /* ConstKeyword */));
+        }
+        if (flags & 4 /* Public */) {
+            result.push(createModifier(114 /* PublicKeyword */));
+        }
+        if (flags & 8 /* Private */) {
+            result.push(createModifier(112 /* PrivateKeyword */));
+        }
+        if (flags & 16 /* Protected */) {
+            result.push(createModifier(113 /* ProtectedKeyword */));
+        }
+        if (flags & 128 /* Abstract */) {
+            result.push(createModifier(117 /* AbstractKeyword */));
+        }
+        if (flags & 32 /* Static */) {
+            result.push(createModifier(115 /* StaticKeyword */));
+        }
+        if (flags & 64 /* Readonly */) {
+            result.push(createModifier(132 /* ReadonlyKeyword */));
+        }
+        if (flags & 256 /* Async */) {
+            result.push(createModifier(120 /* AsyncKeyword */));
+        }
+        return result;
+    }
+    ts.createModifiersFromModifierFlags = createModifiersFromModifierFlags;
+    // Names
+    function createQualifiedName(left, right) {
+        var node = createSynthesizedNode(146 /* QualifiedName */);
+        node.left = left;
+        node.right = asName(right);
+        return node;
+    }
+    ts.createQualifiedName = createQualifiedName;
+    function updateQualifiedName(node, left, right) {
+        return node.left !== left
+            || node.right !== right
+            ? updateNode(createQualifiedName(left, right), node)
+            : node;
+    }
+    ts.updateQualifiedName = updateQualifiedName;
+    function parenthesizeForComputedName(expression) {
+        return (ts.isBinaryExpression(expression) && expression.operatorToken.kind === 26 /* CommaToken */) ||
+            expression.kind === 302 /* CommaListExpression */ ?
+            createParen(expression) :
+            expression;
+    }
+    function createComputedPropertyName(expression) {
+        var node = createSynthesizedNode(147 /* ComputedPropertyName */);
+        node.expression = parenthesizeForComputedName(expression);
+        return node;
+    }
+    ts.createComputedPropertyName = createComputedPropertyName;
+    function updateComputedPropertyName(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createComputedPropertyName(expression), node)
+            : node;
+    }
+    ts.updateComputedPropertyName = updateComputedPropertyName;
+    // Signature elements
+    function createTypeParameterDeclaration(name, constraint, defaultType) {
+        var node = createSynthesizedNode(148 /* TypeParameter */);
+        node.name = asName(name);
+        node.constraint = constraint;
+        node.default = defaultType;
+        return node;
+    }
+    ts.createTypeParameterDeclaration = createTypeParameterDeclaration;
+    function updateTypeParameterDeclaration(node, name, constraint, defaultType) {
+        return node.name !== name
+            || node.constraint !== constraint
+            || node.default !== defaultType
+            ? updateNode(createTypeParameterDeclaration(name, constraint, defaultType), node)
+            : node;
+    }
+    ts.updateTypeParameterDeclaration = updateTypeParameterDeclaration;
+    function createParameter(decorators, modifiers, dotDotDotToken, name, questionToken, type, initializer) {
+        var node = createSynthesizedNode(149 /* Parameter */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.dotDotDotToken = dotDotDotToken;
+        node.name = asName(name);
+        node.questionToken = questionToken;
+        node.type = type;
+        node.initializer = initializer ? ts.parenthesizeExpressionForList(initializer) : undefined;
+        return node;
+    }
+    ts.createParameter = createParameter;
+    function updateParameter(node, decorators, modifiers, dotDotDotToken, name, questionToken, type, initializer) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.dotDotDotToken !== dotDotDotToken
+            || node.name !== name
+            || node.questionToken !== questionToken
+            || node.type !== type
+            || node.initializer !== initializer
+            ? updateNode(createParameter(decorators, modifiers, dotDotDotToken, name, questionToken, type, initializer), node)
+            : node;
+    }
+    ts.updateParameter = updateParameter;
+    function createDecorator(expression) {
+        var node = createSynthesizedNode(150 /* Decorator */);
+        node.expression = ts.parenthesizeForAccess(expression);
+        return node;
+    }
+    ts.createDecorator = createDecorator;
+    function updateDecorator(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createDecorator(expression), node)
+            : node;
+    }
+    ts.updateDecorator = updateDecorator;
+    // Type Elements
+    function createPropertySignature(modifiers, name, questionToken, type, initializer) {
+        var node = createSynthesizedNode(151 /* PropertySignature */);
+        node.modifiers = asNodeArray(modifiers);
+        node.name = asName(name);
+        node.questionToken = questionToken;
+        node.type = type;
+        node.initializer = initializer;
+        return node;
+    }
+    ts.createPropertySignature = createPropertySignature;
+    function updatePropertySignature(node, modifiers, name, questionToken, type, initializer) {
+        return node.modifiers !== modifiers
+            || node.name !== name
+            || node.questionToken !== questionToken
+            || node.type !== type
+            || node.initializer !== initializer
+            ? updateNode(createPropertySignature(modifiers, name, questionToken, type, initializer), node)
+            : node;
+    }
+    ts.updatePropertySignature = updatePropertySignature;
+    function createProperty(decorators, modifiers, name, questionOrExclamationToken, type, initializer) {
+        var node = createSynthesizedNode(152 /* PropertyDeclaration */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.name = asName(name);
+        node.questionToken = questionOrExclamationToken !== undefined && questionOrExclamationToken.kind === 55 /* QuestionToken */ ? questionOrExclamationToken : undefined;
+        node.exclamationToken = questionOrExclamationToken !== undefined && questionOrExclamationToken.kind === 51 /* ExclamationToken */ ? questionOrExclamationToken : undefined;
+        node.type = type;
+        node.initializer = initializer;
+        return node;
+    }
+    ts.createProperty = createProperty;
+    function updateProperty(node, decorators, modifiers, name, questionOrExclamationToken, type, initializer) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.name !== name
+            || node.questionToken !== (questionOrExclamationToken !== undefined && questionOrExclamationToken.kind === 55 /* QuestionToken */ ? questionOrExclamationToken : undefined)
+            || node.exclamationToken !== (questionOrExclamationToken !== undefined && questionOrExclamationToken.kind === 51 /* ExclamationToken */ ? questionOrExclamationToken : undefined)
+            || node.type !== type
+            || node.initializer !== initializer
+            ? updateNode(createProperty(decorators, modifiers, name, questionOrExclamationToken, type, initializer), node)
+            : node;
+    }
+    ts.updateProperty = updateProperty;
+    function createMethodSignature(typeParameters, parameters, type, name, questionToken) {
+        var node = createSignatureDeclaration(153 /* MethodSignature */, typeParameters, parameters, type);
+        node.name = asName(name);
+        node.questionToken = questionToken;
+        return node;
+    }
+    ts.createMethodSignature = createMethodSignature;
+    function updateMethodSignature(node, typeParameters, parameters, type, name, questionToken) {
+        return node.typeParameters !== typeParameters
+            || node.parameters !== parameters
+            || node.type !== type
+            || node.name !== name
+            || node.questionToken !== questionToken
+            ? updateNode(createMethodSignature(typeParameters, parameters, type, name, questionToken), node)
+            : node;
+    }
+    ts.updateMethodSignature = updateMethodSignature;
+    function createMethod(decorators, modifiers, asteriskToken, name, questionToken, typeParameters, parameters, type, body) {
+        var node = createSynthesizedNode(154 /* MethodDeclaration */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.asteriskToken = asteriskToken;
+        node.name = asName(name);
+        node.questionToken = questionToken;
+        node.typeParameters = asNodeArray(typeParameters);
+        node.parameters = createNodeArray(parameters);
+        node.type = type;
+        node.body = body;
+        return node;
+    }
+    ts.createMethod = createMethod;
+    function updateMethod(node, decorators, modifiers, asteriskToken, name, questionToken, typeParameters, parameters, type, body) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.asteriskToken !== asteriskToken
+            || node.name !== name
+            || node.questionToken !== questionToken
+            || node.typeParameters !== typeParameters
+            || node.parameters !== parameters
+            || node.type !== type
+            || node.body !== body
+            ? updateNode(createMethod(decorators, modifiers, asteriskToken, name, questionToken, typeParameters, parameters, type, body), node)
+            : node;
+    }
+    ts.updateMethod = updateMethod;
+    function createConstructor(decorators, modifiers, parameters, body) {
+        var node = createSynthesizedNode(155 /* Constructor */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.typeParameters = undefined;
+        node.parameters = createNodeArray(parameters);
+        node.type = undefined;
+        node.body = body;
+        return node;
+    }
+    ts.createConstructor = createConstructor;
+    function updateConstructor(node, decorators, modifiers, parameters, body) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.parameters !== parameters
+            || node.body !== body
+            ? updateNode(createConstructor(decorators, modifiers, parameters, body), node)
+            : node;
+    }
+    ts.updateConstructor = updateConstructor;
+    function createGetAccessor(decorators, modifiers, name, parameters, type, body) {
+        var node = createSynthesizedNode(156 /* GetAccessor */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.name = asName(name);
+        node.typeParameters = undefined;
+        node.parameters = createNodeArray(parameters);
+        node.type = type;
+        node.body = body;
+        return node;
+    }
+    ts.createGetAccessor = createGetAccessor;
+    function updateGetAccessor(node, decorators, modifiers, name, parameters, type, body) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.name !== name
+            || node.parameters !== parameters
+            || node.type !== type
+            || node.body !== body
+            ? updateNode(createGetAccessor(decorators, modifiers, name, parameters, type, body), node)
+            : node;
+    }
+    ts.updateGetAccessor = updateGetAccessor;
+    function createSetAccessor(decorators, modifiers, name, parameters, body) {
+        var node = createSynthesizedNode(157 /* SetAccessor */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.name = asName(name);
+        node.typeParameters = undefined;
+        node.parameters = createNodeArray(parameters);
+        node.body = body;
+        return node;
+    }
+    ts.createSetAccessor = createSetAccessor;
+    function updateSetAccessor(node, decorators, modifiers, name, parameters, body) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.name !== name
+            || node.parameters !== parameters
+            || node.body !== body
+            ? updateNode(createSetAccessor(decorators, modifiers, name, parameters, body), node)
+            : node;
+    }
+    ts.updateSetAccessor = updateSetAccessor;
+    function createCallSignature(typeParameters, parameters, type) {
+        return createSignatureDeclaration(158 /* CallSignature */, typeParameters, parameters, type);
+    }
+    ts.createCallSignature = createCallSignature;
+    function updateCallSignature(node, typeParameters, parameters, type) {
+        return updateSignatureDeclaration(node, typeParameters, parameters, type);
+    }
+    ts.updateCallSignature = updateCallSignature;
+    function createConstructSignature(typeParameters, parameters, type) {
+        return createSignatureDeclaration(159 /* ConstructSignature */, typeParameters, parameters, type);
+    }
+    ts.createConstructSignature = createConstructSignature;
+    function updateConstructSignature(node, typeParameters, parameters, type) {
+        return updateSignatureDeclaration(node, typeParameters, parameters, type);
+    }
+    ts.updateConstructSignature = updateConstructSignature;
+    function createIndexSignature(decorators, modifiers, parameters, type) {
+        var node = createSynthesizedNode(160 /* IndexSignature */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.parameters = createNodeArray(parameters);
+        node.type = type;
+        return node;
+    }
+    ts.createIndexSignature = createIndexSignature;
+    function updateIndexSignature(node, decorators, modifiers, parameters, type) {
+        return node.parameters !== parameters
+            || node.type !== type
+            || node.decorators !== decorators
+            || node.modifiers !== modifiers
+            ? updateNode(createIndexSignature(decorators, modifiers, parameters, type), node)
+            : node;
+    }
+    ts.updateIndexSignature = updateIndexSignature;
+    /* @internal */
+    function createSignatureDeclaration(kind, typeParameters, parameters, type, typeArguments) {
+        var node = createSynthesizedNode(kind);
+        node.typeParameters = asNodeArray(typeParameters);
+        node.parameters = asNodeArray(parameters);
+        node.type = type;
+        node.typeArguments = asNodeArray(typeArguments);
+        return node;
+    }
+    ts.createSignatureDeclaration = createSignatureDeclaration;
+    function updateSignatureDeclaration(node, typeParameters, parameters, type) {
+        return node.typeParameters !== typeParameters
+            || node.parameters !== parameters
+            || node.type !== type
+            ? updateNode(createSignatureDeclaration(node.kind, typeParameters, parameters, type), node)
+            : node;
+    }
+    // Types
+    function createKeywordTypeNode(kind) {
+        return createSynthesizedNode(kind);
+    }
+    ts.createKeywordTypeNode = createKeywordTypeNode;
+    function createTypePredicateNode(parameterName, type) {
+        var node = createSynthesizedNode(161 /* TypePredicate */);
+        node.parameterName = asName(parameterName);
+        node.type = type;
+        return node;
+    }
+    ts.createTypePredicateNode = createTypePredicateNode;
+    function updateTypePredicateNode(node, parameterName, type) {
+        return node.parameterName !== parameterName
+            || node.type !== type
+            ? updateNode(createTypePredicateNode(parameterName, type), node)
+            : node;
+    }
+    ts.updateTypePredicateNode = updateTypePredicateNode;
+    function createTypeReferenceNode(typeName, typeArguments) {
+        var node = createSynthesizedNode(162 /* TypeReference */);
+        node.typeName = asName(typeName);
+        node.typeArguments = typeArguments && ts.parenthesizeTypeParameters(typeArguments);
+        return node;
+    }
+    ts.createTypeReferenceNode = createTypeReferenceNode;
+    function updateTypeReferenceNode(node, typeName, typeArguments) {
+        return node.typeName !== typeName
+            || node.typeArguments !== typeArguments
+            ? updateNode(createTypeReferenceNode(typeName, typeArguments), node)
+            : node;
+    }
+    ts.updateTypeReferenceNode = updateTypeReferenceNode;
+    function createFunctionTypeNode(typeParameters, parameters, type) {
+        return createSignatureDeclaration(163 /* FunctionType */, typeParameters, parameters, type);
+    }
+    ts.createFunctionTypeNode = createFunctionTypeNode;
+    function updateFunctionTypeNode(node, typeParameters, parameters, type) {
+        return updateSignatureDeclaration(node, typeParameters, parameters, type);
+    }
+    ts.updateFunctionTypeNode = updateFunctionTypeNode;
+    function createConstructorTypeNode(typeParameters, parameters, type) {
+        return createSignatureDeclaration(164 /* ConstructorType */, typeParameters, parameters, type);
+    }
+    ts.createConstructorTypeNode = createConstructorTypeNode;
+    function updateConstructorTypeNode(node, typeParameters, parameters, type) {
+        return updateSignatureDeclaration(node, typeParameters, parameters, type);
+    }
+    ts.updateConstructorTypeNode = updateConstructorTypeNode;
+    function createTypeQueryNode(exprName) {
+        var node = createSynthesizedNode(165 /* TypeQuery */);
+        node.exprName = exprName;
+        return node;
+    }
+    ts.createTypeQueryNode = createTypeQueryNode;
+    function updateTypeQueryNode(node, exprName) {
+        return node.exprName !== exprName
+            ? updateNode(createTypeQueryNode(exprName), node)
+            : node;
+    }
+    ts.updateTypeQueryNode = updateTypeQueryNode;
+    function createTypeLiteralNode(members) {
+        var node = createSynthesizedNode(166 /* TypeLiteral */);
+        node.members = createNodeArray(members);
+        return node;
+    }
+    ts.createTypeLiteralNode = createTypeLiteralNode;
+    function updateTypeLiteralNode(node, members) {
+        return node.members !== members
+            ? updateNode(createTypeLiteralNode(members), node)
+            : node;
+    }
+    ts.updateTypeLiteralNode = updateTypeLiteralNode;
+    function createArrayTypeNode(elementType) {
+        var node = createSynthesizedNode(167 /* ArrayType */);
+        node.elementType = ts.parenthesizeArrayTypeMember(elementType);
+        return node;
+    }
+    ts.createArrayTypeNode = createArrayTypeNode;
+    function updateArrayTypeNode(node, elementType) {
+        return node.elementType !== elementType
+            ? updateNode(createArrayTypeNode(elementType), node)
+            : node;
+    }
+    ts.updateArrayTypeNode = updateArrayTypeNode;
+    function createTupleTypeNode(elementTypes) {
+        var node = createSynthesizedNode(168 /* TupleType */);
+        node.elementTypes = createNodeArray(elementTypes);
+        return node;
+    }
+    ts.createTupleTypeNode = createTupleTypeNode;
+    function updateTypleTypeNode(node, elementTypes) {
+        return node.elementTypes !== elementTypes
+            ? updateNode(createTupleTypeNode(elementTypes), node)
+            : node;
+    }
+    ts.updateTypleTypeNode = updateTypleTypeNode;
+    function createUnionTypeNode(types) {
+        return createUnionOrIntersectionTypeNode(169 /* UnionType */, types);
+    }
+    ts.createUnionTypeNode = createUnionTypeNode;
+    function updateUnionTypeNode(node, types) {
+        return updateUnionOrIntersectionTypeNode(node, types);
+    }
+    ts.updateUnionTypeNode = updateUnionTypeNode;
+    function createIntersectionTypeNode(types) {
+        return createUnionOrIntersectionTypeNode(170 /* IntersectionType */, types);
+    }
+    ts.createIntersectionTypeNode = createIntersectionTypeNode;
+    function updateIntersectionTypeNode(node, types) {
+        return updateUnionOrIntersectionTypeNode(node, types);
+    }
+    ts.updateIntersectionTypeNode = updateIntersectionTypeNode;
+    function createUnionOrIntersectionTypeNode(kind, types) {
+        var node = createSynthesizedNode(kind);
+        node.types = ts.parenthesizeElementTypeMembers(types);
+        return node;
+    }
+    ts.createUnionOrIntersectionTypeNode = createUnionOrIntersectionTypeNode;
+    function updateUnionOrIntersectionTypeNode(node, types) {
+        return node.types !== types
+            ? updateNode(createUnionOrIntersectionTypeNode(node.kind, types), node)
+            : node;
+    }
+    function createConditionalTypeNode(checkType, extendsType, trueType, falseType) {
+        var node = createSynthesizedNode(171 /* ConditionalType */);
+        node.checkType = ts.parenthesizeConditionalTypeMember(checkType);
+        node.extendsType = ts.parenthesizeConditionalTypeMember(extendsType);
+        node.trueType = trueType;
+        node.falseType = falseType;
+        return node;
+    }
+    ts.createConditionalTypeNode = createConditionalTypeNode;
+    function updateConditionalTypeNode(node, checkType, extendsType, trueType, falseType) {
+        return node.checkType !== checkType
+            || node.extendsType !== extendsType
+            || node.trueType !== trueType
+            || node.falseType !== falseType
+            ? updateNode(createConditionalTypeNode(checkType, extendsType, trueType, falseType), node)
+            : node;
+    }
+    ts.updateConditionalTypeNode = updateConditionalTypeNode;
+    function createInferTypeNode(typeParameter) {
+        var node = createSynthesizedNode(172 /* InferType */);
+        node.typeParameter = typeParameter;
+        return node;
+    }
+    ts.createInferTypeNode = createInferTypeNode;
+    function updateInferTypeNode(node, typeParameter) {
+        return node.typeParameter !== typeParameter
+            ? updateNode(createInferTypeNode(typeParameter), node)
+            : node;
+    }
+    ts.updateInferTypeNode = updateInferTypeNode;
+    function createImportTypeNode(argument, qualifier, typeArguments, isTypeOf) {
+        var node = createSynthesizedNode(179 /* ImportType */);
+        node.argument = argument;
+        node.qualifier = qualifier;
+        node.typeArguments = asNodeArray(typeArguments);
+        node.isTypeOf = isTypeOf;
+        return node;
+    }
+    ts.createImportTypeNode = createImportTypeNode;
+    function updateImportTypeNode(node, argument, qualifier, typeArguments, isTypeOf) {
+        return node.argument !== argument
+            || node.qualifier !== qualifier
+            || node.typeArguments !== typeArguments
+            || node.isTypeOf !== isTypeOf
+            ? updateNode(createImportTypeNode(argument, qualifier, typeArguments, isTypeOf), node)
+            : node;
+    }
+    ts.updateImportTypeNode = updateImportTypeNode;
+    function createParenthesizedType(type) {
+        var node = createSynthesizedNode(173 /* ParenthesizedType */);
+        node.type = type;
+        return node;
+    }
+    ts.createParenthesizedType = createParenthesizedType;
+    function updateParenthesizedType(node, type) {
+        return node.type !== type
+            ? updateNode(createParenthesizedType(type), node)
+            : node;
+    }
+    ts.updateParenthesizedType = updateParenthesizedType;
+    function createThisTypeNode() {
+        return createSynthesizedNode(174 /* ThisType */);
+    }
+    ts.createThisTypeNode = createThisTypeNode;
+    function createTypeOperatorNode(operatorOrType, type) {
+        var node = createSynthesizedNode(175 /* TypeOperator */);
+        node.operator = typeof operatorOrType === "number" ? operatorOrType : 128 /* KeyOfKeyword */;
+        node.type = ts.parenthesizeElementTypeMember(typeof operatorOrType === "number" ? type : operatorOrType);
+        return node;
+    }
+    ts.createTypeOperatorNode = createTypeOperatorNode;
+    function updateTypeOperatorNode(node, type) {
+        return node.type !== type ? updateNode(createTypeOperatorNode(node.operator, type), node) : node;
+    }
+    ts.updateTypeOperatorNode = updateTypeOperatorNode;
+    function createIndexedAccessTypeNode(objectType, indexType) {
+        var node = createSynthesizedNode(176 /* IndexedAccessType */);
+        node.objectType = ts.parenthesizeElementTypeMember(objectType);
+        node.indexType = indexType;
+        return node;
+    }
+    ts.createIndexedAccessTypeNode = createIndexedAccessTypeNode;
+    function updateIndexedAccessTypeNode(node, objectType, indexType) {
+        return node.objectType !== objectType
+            || node.indexType !== indexType
+            ? updateNode(createIndexedAccessTypeNode(objectType, indexType), node)
+            : node;
+    }
+    ts.updateIndexedAccessTypeNode = updateIndexedAccessTypeNode;
+    function createMappedTypeNode(readonlyToken, typeParameter, questionToken, type) {
+        var node = createSynthesizedNode(177 /* MappedType */);
+        node.readonlyToken = readonlyToken;
+        node.typeParameter = typeParameter;
+        node.questionToken = questionToken;
+        node.type = type;
+        return node;
+    }
+    ts.createMappedTypeNode = createMappedTypeNode;
+    function updateMappedTypeNode(node, readonlyToken, typeParameter, questionToken, type) {
+        return node.readonlyToken !== readonlyToken
+            || node.typeParameter !== typeParameter
+            || node.questionToken !== questionToken
+            || node.type !== type
+            ? updateNode(createMappedTypeNode(readonlyToken, typeParameter, questionToken, type), node)
+            : node;
+    }
+    ts.updateMappedTypeNode = updateMappedTypeNode;
+    function createLiteralTypeNode(literal) {
+        var node = createSynthesizedNode(178 /* LiteralType */);
+        node.literal = literal;
+        return node;
+    }
+    ts.createLiteralTypeNode = createLiteralTypeNode;
+    function updateLiteralTypeNode(node, literal) {
+        return node.literal !== literal
+            ? updateNode(createLiteralTypeNode(literal), node)
+            : node;
+    }
+    ts.updateLiteralTypeNode = updateLiteralTypeNode;
+    // Binding Patterns
+    function createObjectBindingPattern(elements) {
+        var node = createSynthesizedNode(180 /* ObjectBindingPattern */);
+        node.elements = createNodeArray(elements);
+        return node;
+    }
+    ts.createObjectBindingPattern = createObjectBindingPattern;
+    function updateObjectBindingPattern(node, elements) {
+        return node.elements !== elements
+            ? updateNode(createObjectBindingPattern(elements), node)
+            : node;
+    }
+    ts.updateObjectBindingPattern = updateObjectBindingPattern;
+    function createArrayBindingPattern(elements) {
+        var node = createSynthesizedNode(181 /* ArrayBindingPattern */);
+        node.elements = createNodeArray(elements);
+        return node;
+    }
+    ts.createArrayBindingPattern = createArrayBindingPattern;
+    function updateArrayBindingPattern(node, elements) {
+        return node.elements !== elements
+            ? updateNode(createArrayBindingPattern(elements), node)
+            : node;
+    }
+    ts.updateArrayBindingPattern = updateArrayBindingPattern;
+    function createBindingElement(dotDotDotToken, propertyName, name, initializer) {
+        var node = createSynthesizedNode(182 /* BindingElement */);
+        node.dotDotDotToken = dotDotDotToken;
+        node.propertyName = asName(propertyName);
+        node.name = asName(name);
+        node.initializer = initializer;
+        return node;
+    }
+    ts.createBindingElement = createBindingElement;
+    function updateBindingElement(node, dotDotDotToken, propertyName, name, initializer) {
+        return node.propertyName !== propertyName
+            || node.dotDotDotToken !== dotDotDotToken
+            || node.name !== name
+            || node.initializer !== initializer
+            ? updateNode(createBindingElement(dotDotDotToken, propertyName, name, initializer), node)
+            : node;
+    }
+    ts.updateBindingElement = updateBindingElement;
+    // Expression
+    function createArrayLiteral(elements, multiLine) {
+        var node = createSynthesizedNode(183 /* ArrayLiteralExpression */);
+        node.elements = ts.parenthesizeListElements(createNodeArray(elements));
+        if (multiLine)
+            node.multiLine = true;
+        return node;
+    }
+    ts.createArrayLiteral = createArrayLiteral;
+    function updateArrayLiteral(node, elements) {
+        return node.elements !== elements
+            ? updateNode(createArrayLiteral(elements, node.multiLine), node)
+            : node;
+    }
+    ts.updateArrayLiteral = updateArrayLiteral;
+    function createObjectLiteral(properties, multiLine) {
+        var node = createSynthesizedNode(184 /* ObjectLiteralExpression */);
+        node.properties = createNodeArray(properties);
+        if (multiLine)
+            node.multiLine = true;
+        return node;
+    }
+    ts.createObjectLiteral = createObjectLiteral;
+    function updateObjectLiteral(node, properties) {
+        return node.properties !== properties
+            ? updateNode(createObjectLiteral(properties, node.multiLine), node)
+            : node;
+    }
+    ts.updateObjectLiteral = updateObjectLiteral;
+    function createPropertyAccess(expression, name) {
+        var node = createSynthesizedNode(185 /* PropertyAccessExpression */);
+        node.expression = ts.parenthesizeForAccess(expression);
+        node.name = asName(name); // TODO: GH#18217
+        setEmitFlags(node, 131072 /* NoIndentation */);
+        return node;
+    }
+    ts.createPropertyAccess = createPropertyAccess;
+    function updatePropertyAccess(node, expression, name) {
+        // Because we are updating existed propertyAccess we want to inherit its emitFlags
+        // instead of using the default from createPropertyAccess
+        return node.expression !== expression
+            || node.name !== name
+            ? updateNode(setEmitFlags(createPropertyAccess(expression, name), ts.getEmitFlags(node)), node)
+            : node;
+    }
+    ts.updatePropertyAccess = updatePropertyAccess;
+    function createElementAccess(expression, index) {
+        var node = createSynthesizedNode(186 /* ElementAccessExpression */);
+        node.expression = ts.parenthesizeForAccess(expression);
+        node.argumentExpression = asExpression(index);
+        return node;
+    }
+    ts.createElementAccess = createElementAccess;
+    function updateElementAccess(node, expression, argumentExpression) {
+        return node.expression !== expression
+            || node.argumentExpression !== argumentExpression
+            ? updateNode(createElementAccess(expression, argumentExpression), node)
+            : node;
+    }
+    ts.updateElementAccess = updateElementAccess;
+    function createCall(expression, typeArguments, argumentsArray) {
+        var node = createSynthesizedNode(187 /* CallExpression */);
+        node.expression = ts.parenthesizeForAccess(expression);
+        node.typeArguments = asNodeArray(typeArguments);
+        node.arguments = ts.parenthesizeListElements(createNodeArray(argumentsArray));
+        return node;
+    }
+    ts.createCall = createCall;
+    function updateCall(node, expression, typeArguments, argumentsArray) {
+        return node.expression !== expression
+            || node.typeArguments !== typeArguments
+            || node.arguments !== argumentsArray
+            ? updateNode(createCall(expression, typeArguments, argumentsArray), node)
+            : node;
+    }
+    ts.updateCall = updateCall;
+    function createNew(expression, typeArguments, argumentsArray) {
+        var node = createSynthesizedNode(188 /* NewExpression */);
+        node.expression = ts.parenthesizeForNew(expression);
+        node.typeArguments = asNodeArray(typeArguments);
+        node.arguments = argumentsArray ? ts.parenthesizeListElements(createNodeArray(argumentsArray)) : undefined;
+        return node;
+    }
+    ts.createNew = createNew;
+    function updateNew(node, expression, typeArguments, argumentsArray) {
+        return node.expression !== expression
+            || node.typeArguments !== typeArguments
+            || node.arguments !== argumentsArray
+            ? updateNode(createNew(expression, typeArguments, argumentsArray), node)
+            : node;
+    }
+    ts.updateNew = updateNew;
+    function createTaggedTemplate(tag, typeArgumentsOrTemplate, template) {
+        var node = createSynthesizedNode(189 /* TaggedTemplateExpression */);
+        node.tag = ts.parenthesizeForAccess(tag);
+        if (template) {
+            node.typeArguments = asNodeArray(typeArgumentsOrTemplate);
+            node.template = template;
+        }
+        else {
+            node.typeArguments = undefined;
+            node.template = typeArgumentsOrTemplate;
+        }
+        return node;
+    }
+    ts.createTaggedTemplate = createTaggedTemplate;
+    function updateTaggedTemplate(node, tag, typeArgumentsOrTemplate, template) {
+        return node.tag !== tag
+            || (template
+                ? node.typeArguments !== typeArgumentsOrTemplate || node.template !== template
+                : node.typeArguments !== undefined || node.template !== typeArgumentsOrTemplate)
+            ? updateNode(createTaggedTemplate(tag, typeArgumentsOrTemplate, template), node)
+            : node;
+    }
+    ts.updateTaggedTemplate = updateTaggedTemplate;
+    function createTypeAssertion(type, expression) {
+        var node = createSynthesizedNode(190 /* TypeAssertionExpression */);
+        node.type = type;
+        node.expression = ts.parenthesizePrefixOperand(expression);
+        return node;
+    }
+    ts.createTypeAssertion = createTypeAssertion;
+    function updateTypeAssertion(node, type, expression) {
+        return node.type !== type
+            || node.expression !== expression
+            ? updateNode(createTypeAssertion(type, expression), node)
+            : node;
+    }
+    ts.updateTypeAssertion = updateTypeAssertion;
+    function createParen(expression) {
+        var node = createSynthesizedNode(191 /* ParenthesizedExpression */);
+        node.expression = expression;
+        return node;
+    }
+    ts.createParen = createParen;
+    function updateParen(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createParen(expression), node)
+            : node;
+    }
+    ts.updateParen = updateParen;
+    function createFunctionExpression(modifiers, asteriskToken, name, typeParameters, parameters, type, body) {
+        var node = createSynthesizedNode(192 /* FunctionExpression */);
+        node.modifiers = asNodeArray(modifiers);
+        node.asteriskToken = asteriskToken;
+        node.name = asName(name);
+        node.typeParameters = asNodeArray(typeParameters);
+        node.parameters = createNodeArray(parameters);
+        node.type = type;
+        node.body = body;
+        return node;
+    }
+    ts.createFunctionExpression = createFunctionExpression;
+    function updateFunctionExpression(node, modifiers, asteriskToken, name, typeParameters, parameters, type, body) {
+        return node.name !== name
+            || node.modifiers !== modifiers
+            || node.asteriskToken !== asteriskToken
+            || node.typeParameters !== typeParameters
+            || node.parameters !== parameters
+            || node.type !== type
+            || node.body !== body
+            ? updateNode(createFunctionExpression(modifiers, asteriskToken, name, typeParameters, parameters, type, body), node)
+            : node;
+    }
+    ts.updateFunctionExpression = updateFunctionExpression;
+    function createArrowFunction(modifiers, typeParameters, parameters, type, equalsGreaterThanToken, body) {
+        var node = createSynthesizedNode(193 /* ArrowFunction */);
+        node.modifiers = asNodeArray(modifiers);
+        node.typeParameters = asNodeArray(typeParameters);
+        node.parameters = createNodeArray(parameters);
+        node.type = type;
+        node.equalsGreaterThanToken = equalsGreaterThanToken || createToken(36 /* EqualsGreaterThanToken */);
+        node.body = ts.parenthesizeConciseBody(body);
+        return node;
+    }
+    ts.createArrowFunction = createArrowFunction;
+    function updateArrowFunction(node, modifiers, typeParameters, parameters, type, equalsGreaterThanTokenOrBody, bodyOrUndefined) {
+        var equalsGreaterThanToken;
+        var body;
+        if (bodyOrUndefined === undefined) {
+            equalsGreaterThanToken = node.equalsGreaterThanToken;
+            body = ts.cast(equalsGreaterThanTokenOrBody, ts.isConciseBody);
+        }
+        else {
+            equalsGreaterThanToken = ts.cast(equalsGreaterThanTokenOrBody, function (n) {
+                return n.kind === 36 /* EqualsGreaterThanToken */;
+            });
+            body = bodyOrUndefined;
+        }
+        return node.modifiers !== modifiers
+            || node.typeParameters !== typeParameters
+            || node.parameters !== parameters
+            || node.type !== type
+            || node.equalsGreaterThanToken !== equalsGreaterThanToken
+            || node.body !== body
+            ? updateNode(createArrowFunction(modifiers, typeParameters, parameters, type, equalsGreaterThanToken, body), node)
+            : node;
+    }
+    ts.updateArrowFunction = updateArrowFunction;
+    function createDelete(expression) {
+        var node = createSynthesizedNode(194 /* DeleteExpression */);
+        node.expression = ts.parenthesizePrefixOperand(expression);
+        return node;
+    }
+    ts.createDelete = createDelete;
+    function updateDelete(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createDelete(expression), node)
+            : node;
+    }
+    ts.updateDelete = updateDelete;
+    function createTypeOf(expression) {
+        var node = createSynthesizedNode(195 /* TypeOfExpression */);
+        node.expression = ts.parenthesizePrefixOperand(expression);
+        return node;
+    }
+    ts.createTypeOf = createTypeOf;
+    function updateTypeOf(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createTypeOf(expression), node)
+            : node;
+    }
+    ts.updateTypeOf = updateTypeOf;
+    function createVoid(expression) {
+        var node = createSynthesizedNode(196 /* VoidExpression */);
+        node.expression = ts.parenthesizePrefixOperand(expression);
+        return node;
+    }
+    ts.createVoid = createVoid;
+    function updateVoid(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createVoid(expression), node)
+            : node;
+    }
+    ts.updateVoid = updateVoid;
+    function createAwait(expression) {
+        var node = createSynthesizedNode(197 /* AwaitExpression */);
+        node.expression = ts.parenthesizePrefixOperand(expression);
+        return node;
+    }
+    ts.createAwait = createAwait;
+    function updateAwait(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createAwait(expression), node)
+            : node;
+    }
+    ts.updateAwait = updateAwait;
+    function createPrefix(operator, operand) {
+        var node = createSynthesizedNode(198 /* PrefixUnaryExpression */);
+        node.operator = operator;
+        node.operand = ts.parenthesizePrefixOperand(operand);
+        return node;
+    }
+    ts.createPrefix = createPrefix;
+    function updatePrefix(node, operand) {
+        return node.operand !== operand
+            ? updateNode(createPrefix(node.operator, operand), node)
+            : node;
+    }
+    ts.updatePrefix = updatePrefix;
+    function createPostfix(operand, operator) {
+        var node = createSynthesizedNode(199 /* PostfixUnaryExpression */);
+        node.operand = ts.parenthesizePostfixOperand(operand);
+        node.operator = operator;
+        return node;
+    }
+    ts.createPostfix = createPostfix;
+    function updatePostfix(node, operand) {
+        return node.operand !== operand
+            ? updateNode(createPostfix(operand, node.operator), node)
+            : node;
+    }
+    ts.updatePostfix = updatePostfix;
+    function createBinary(left, operator, right) {
+        var node = createSynthesizedNode(200 /* BinaryExpression */);
+        var operatorToken = asToken(operator);
+        var operatorKind = operatorToken.kind;
+        node.left = ts.parenthesizeBinaryOperand(operatorKind, left, /*isLeftSideOfBinary*/ true, /*leftOperand*/ undefined);
+        node.operatorToken = operatorToken;
+        node.right = ts.parenthesizeBinaryOperand(operatorKind, right, /*isLeftSideOfBinary*/ false, node.left);
+        return node;
+    }
+    ts.createBinary = createBinary;
+    function updateBinary(node, left, right, operator) {
+        return node.left !== left
+            || node.right !== right
+            ? updateNode(createBinary(left, operator || node.operatorToken, right), node)
+            : node;
+    }
+    ts.updateBinary = updateBinary;
+    function createConditional(condition, questionTokenOrWhenTrue, whenTrueOrWhenFalse, colonToken, whenFalse) {
+        var node = createSynthesizedNode(201 /* ConditionalExpression */);
+        node.condition = ts.parenthesizeForConditionalHead(condition);
+        node.questionToken = whenFalse ? questionTokenOrWhenTrue : createToken(55 /* QuestionToken */);
+        node.whenTrue = ts.parenthesizeSubexpressionOfConditionalExpression(whenFalse ? whenTrueOrWhenFalse : questionTokenOrWhenTrue);
+        node.colonToken = whenFalse ? colonToken : createToken(56 /* ColonToken */);
+        node.whenFalse = ts.parenthesizeSubexpressionOfConditionalExpression(whenFalse ? whenFalse : whenTrueOrWhenFalse);
+        return node;
+    }
+    ts.createConditional = createConditional;
+    function updateConditional(node, condition) {
+        var args = [];
+        for (var _i = 2; _i < arguments.length; _i++) {
+            args[_i - 2] = arguments[_i];
+        }
+        if (args.length === 2) {
+            var whenTrue_1 = args[0], whenFalse_1 = args[1];
+            return updateConditional(node, condition, node.questionToken, whenTrue_1, node.colonToken, whenFalse_1);
+        }
+        ts.Debug.assert(args.length === 4);
+        var questionToken = args[0], whenTrue = args[1], colonToken = args[2], whenFalse = args[3];
+        return node.condition !== condition
+            || node.questionToken !== questionToken
+            || node.whenTrue !== whenTrue
+            || node.colonToken !== colonToken
+            || node.whenFalse !== whenFalse
+            ? updateNode(createConditional(condition, questionToken, whenTrue, colonToken, whenFalse), node)
+            : node;
+    }
+    ts.updateConditional = updateConditional;
+    function createTemplateExpression(head, templateSpans) {
+        var node = createSynthesizedNode(202 /* TemplateExpression */);
+        node.head = head;
+        node.templateSpans = createNodeArray(templateSpans);
+        return node;
+    }
+    ts.createTemplateExpression = createTemplateExpression;
+    function updateTemplateExpression(node, head, templateSpans) {
+        return node.head !== head
+            || node.templateSpans !== templateSpans
+            ? updateNode(createTemplateExpression(head, templateSpans), node)
+            : node;
+    }
+    ts.updateTemplateExpression = updateTemplateExpression;
+    function createTemplateHead(text) {
+        var node = createSynthesizedNode(14 /* TemplateHead */);
+        node.text = text;
+        return node;
+    }
+    ts.createTemplateHead = createTemplateHead;
+    function createTemplateMiddle(text) {
+        var node = createSynthesizedNode(15 /* TemplateMiddle */);
+        node.text = text;
+        return node;
+    }
+    ts.createTemplateMiddle = createTemplateMiddle;
+    function createTemplateTail(text) {
+        var node = createSynthesizedNode(16 /* TemplateTail */);
+        node.text = text;
+        return node;
+    }
+    ts.createTemplateTail = createTemplateTail;
+    function createNoSubstitutionTemplateLiteral(text) {
+        var node = createSynthesizedNode(13 /* NoSubstitutionTemplateLiteral */);
+        node.text = text;
+        return node;
+    }
+    ts.createNoSubstitutionTemplateLiteral = createNoSubstitutionTemplateLiteral;
+    function createYield(asteriskTokenOrExpression, expression) {
+        var node = createSynthesizedNode(203 /* YieldExpression */);
+        node.asteriskToken = asteriskTokenOrExpression && asteriskTokenOrExpression.kind === 39 /* AsteriskToken */ ? asteriskTokenOrExpression : undefined;
+        node.expression = asteriskTokenOrExpression && asteriskTokenOrExpression.kind !== 39 /* AsteriskToken */ ? asteriskTokenOrExpression : expression;
+        return node;
+    }
+    ts.createYield = createYield;
+    function updateYield(node, asteriskToken, expression) {
+        return node.expression !== expression
+            || node.asteriskToken !== asteriskToken
+            ? updateNode(createYield(asteriskToken, expression), node)
+            : node;
+    }
+    ts.updateYield = updateYield;
+    function createSpread(expression) {
+        var node = createSynthesizedNode(204 /* SpreadElement */);
+        node.expression = ts.parenthesizeExpressionForList(expression);
+        return node;
+    }
+    ts.createSpread = createSpread;
+    function updateSpread(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createSpread(expression), node)
+            : node;
+    }
+    ts.updateSpread = updateSpread;
+    function createClassExpression(modifiers, name, typeParameters, heritageClauses, members) {
+        var node = createSynthesizedNode(205 /* ClassExpression */);
+        node.decorators = undefined;
+        node.modifiers = asNodeArray(modifiers);
+        node.name = asName(name);
+        node.typeParameters = asNodeArray(typeParameters);
+        node.heritageClauses = asNodeArray(heritageClauses);
+        node.members = createNodeArray(members);
+        return node;
+    }
+    ts.createClassExpression = createClassExpression;
+    function updateClassExpression(node, modifiers, name, typeParameters, heritageClauses, members) {
+        return node.modifiers !== modifiers
+            || node.name !== name
+            || node.typeParameters !== typeParameters
+            || node.heritageClauses !== heritageClauses
+            || node.members !== members
+            ? updateNode(createClassExpression(modifiers, name, typeParameters, heritageClauses, members), node)
+            : node;
+    }
+    ts.updateClassExpression = updateClassExpression;
+    function createOmittedExpression() {
+        return createSynthesizedNode(206 /* OmittedExpression */);
+    }
+    ts.createOmittedExpression = createOmittedExpression;
+    function createExpressionWithTypeArguments(typeArguments, expression) {
+        var node = createSynthesizedNode(207 /* ExpressionWithTypeArguments */);
+        node.expression = ts.parenthesizeForAccess(expression);
+        node.typeArguments = asNodeArray(typeArguments);
+        return node;
+    }
+    ts.createExpressionWithTypeArguments = createExpressionWithTypeArguments;
+    function updateExpressionWithTypeArguments(node, typeArguments, expression) {
+        return node.typeArguments !== typeArguments
+            || node.expression !== expression
+            ? updateNode(createExpressionWithTypeArguments(typeArguments, expression), node)
+            : node;
+    }
+    ts.updateExpressionWithTypeArguments = updateExpressionWithTypeArguments;
+    function createAsExpression(expression, type) {
+        var node = createSynthesizedNode(208 /* AsExpression */);
+        node.expression = expression;
+        node.type = type;
+        return node;
+    }
+    ts.createAsExpression = createAsExpression;
+    function updateAsExpression(node, expression, type) {
+        return node.expression !== expression
+            || node.type !== type
+            ? updateNode(createAsExpression(expression, type), node)
+            : node;
+    }
+    ts.updateAsExpression = updateAsExpression;
+    function createNonNullExpression(expression) {
+        var node = createSynthesizedNode(209 /* NonNullExpression */);
+        node.expression = ts.parenthesizeForAccess(expression);
+        return node;
+    }
+    ts.createNonNullExpression = createNonNullExpression;
+    function updateNonNullExpression(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createNonNullExpression(expression), node)
+            : node;
+    }
+    ts.updateNonNullExpression = updateNonNullExpression;
+    function createMetaProperty(keywordToken, name) {
+        var node = createSynthesizedNode(210 /* MetaProperty */);
+        node.keywordToken = keywordToken;
+        node.name = name;
+        return node;
+    }
+    ts.createMetaProperty = createMetaProperty;
+    function updateMetaProperty(node, name) {
+        return node.name !== name
+            ? updateNode(createMetaProperty(node.keywordToken, name), node)
+            : node;
+    }
+    ts.updateMetaProperty = updateMetaProperty;
+    // Misc
+    function createTemplateSpan(expression, literal) {
+        var node = createSynthesizedNode(211 /* TemplateSpan */);
+        node.expression = expression;
+        node.literal = literal;
+        return node;
+    }
+    ts.createTemplateSpan = createTemplateSpan;
+    function updateTemplateSpan(node, expression, literal) {
+        return node.expression !== expression
+            || node.literal !== literal
+            ? updateNode(createTemplateSpan(expression, literal), node)
+            : node;
+    }
+    ts.updateTemplateSpan = updateTemplateSpan;
+    function createSemicolonClassElement() {
+        return createSynthesizedNode(212 /* SemicolonClassElement */);
+    }
+    ts.createSemicolonClassElement = createSemicolonClassElement;
+    // Element
+    function createBlock(statements, multiLine) {
+        var block = createSynthesizedNode(213 /* Block */);
+        block.statements = createNodeArray(statements);
+        if (multiLine)
+            block.multiLine = multiLine;
+        return block;
+    }
+    ts.createBlock = createBlock;
+    /* @internal */
+    function createExpressionStatement(expression) {
+        var node = createSynthesizedNode(216 /* ExpressionStatement */);
+        node.expression = expression;
+        return node;
+    }
+    ts.createExpressionStatement = createExpressionStatement;
+    function updateBlock(node, statements) {
+        return node.statements !== statements
+            ? updateNode(createBlock(statements, node.multiLine), node)
+            : node;
+    }
+    ts.updateBlock = updateBlock;
+    function createVariableStatement(modifiers, declarationList) {
+        var node = createSynthesizedNode(214 /* VariableStatement */);
+        node.decorators = undefined;
+        node.modifiers = asNodeArray(modifiers);
+        node.declarationList = ts.isArray(declarationList) ? createVariableDeclarationList(declarationList) : declarationList;
+        return node;
+    }
+    ts.createVariableStatement = createVariableStatement;
+    function updateVariableStatement(node, modifiers, declarationList) {
+        return node.modifiers !== modifiers
+            || node.declarationList !== declarationList
+            ? updateNode(createVariableStatement(modifiers, declarationList), node)
+            : node;
+    }
+    ts.updateVariableStatement = updateVariableStatement;
+    function createEmptyStatement() {
+        return createSynthesizedNode(215 /* EmptyStatement */);
+    }
+    ts.createEmptyStatement = createEmptyStatement;
+    function createStatement(expression) {
+        return createExpressionStatement(ts.parenthesizeExpressionForExpressionStatement(expression));
+    }
+    ts.createStatement = createStatement;
+    function updateStatement(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createStatement(expression), node)
+            : node;
+    }
+    ts.updateStatement = updateStatement;
+    function createIf(expression, thenStatement, elseStatement) {
+        var node = createSynthesizedNode(217 /* IfStatement */);
+        node.expression = expression;
+        node.thenStatement = thenStatement;
+        node.elseStatement = elseStatement;
+        return node;
+    }
+    ts.createIf = createIf;
+    function updateIf(node, expression, thenStatement, elseStatement) {
+        return node.expression !== expression
+            || node.thenStatement !== thenStatement
+            || node.elseStatement !== elseStatement
+            ? updateNode(createIf(expression, thenStatement, elseStatement), node)
+            : node;
+    }
+    ts.updateIf = updateIf;
+    function createDo(statement, expression) {
+        var node = createSynthesizedNode(218 /* DoStatement */);
+        node.statement = statement;
+        node.expression = expression;
+        return node;
+    }
+    ts.createDo = createDo;
+    function updateDo(node, statement, expression) {
+        return node.statement !== statement
+            || node.expression !== expression
+            ? updateNode(createDo(statement, expression), node)
+            : node;
+    }
+    ts.updateDo = updateDo;
+    function createWhile(expression, statement) {
+        var node = createSynthesizedNode(219 /* WhileStatement */);
+        node.expression = expression;
+        node.statement = statement;
+        return node;
+    }
+    ts.createWhile = createWhile;
+    function updateWhile(node, expression, statement) {
+        return node.expression !== expression
+            || node.statement !== statement
+            ? updateNode(createWhile(expression, statement), node)
+            : node;
+    }
+    ts.updateWhile = updateWhile;
+    function createFor(initializer, condition, incrementor, statement) {
+        var node = createSynthesizedNode(220 /* ForStatement */);
+        node.initializer = initializer;
+        node.condition = condition;
+        node.incrementor = incrementor;
+        node.statement = statement;
+        return node;
+    }
+    ts.createFor = createFor;
+    function updateFor(node, initializer, condition, incrementor, statement) {
+        return node.initializer !== initializer
+            || node.condition !== condition
+            || node.incrementor !== incrementor
+            || node.statement !== statement
+            ? updateNode(createFor(initializer, condition, incrementor, statement), node)
+            : node;
+    }
+    ts.updateFor = updateFor;
+    function createForIn(initializer, expression, statement) {
+        var node = createSynthesizedNode(221 /* ForInStatement */);
+        node.initializer = initializer;
+        node.expression = expression;
+        node.statement = statement;
+        return node;
+    }
+    ts.createForIn = createForIn;
+    function updateForIn(node, initializer, expression, statement) {
+        return node.initializer !== initializer
+            || node.expression !== expression
+            || node.statement !== statement
+            ? updateNode(createForIn(initializer, expression, statement), node)
+            : node;
+    }
+    ts.updateForIn = updateForIn;
+    function createForOf(awaitModifier, initializer, expression, statement) {
+        var node = createSynthesizedNode(222 /* ForOfStatement */);
+        node.awaitModifier = awaitModifier;
+        node.initializer = initializer;
+        node.expression = expression;
+        node.statement = statement;
+        return node;
+    }
+    ts.createForOf = createForOf;
+    function updateForOf(node, awaitModifier, initializer, expression, statement) {
+        return node.awaitModifier !== awaitModifier
+            || node.initializer !== initializer
+            || node.expression !== expression
+            || node.statement !== statement
+            ? updateNode(createForOf(awaitModifier, initializer, expression, statement), node)
+            : node;
+    }
+    ts.updateForOf = updateForOf;
+    function createContinue(label) {
+        var node = createSynthesizedNode(223 /* ContinueStatement */);
+        node.label = asName(label);
+        return node;
+    }
+    ts.createContinue = createContinue;
+    function updateContinue(node, label) {
+        return node.label !== label
+            ? updateNode(createContinue(label), node)
+            : node;
+    }
+    ts.updateContinue = updateContinue;
+    function createBreak(label) {
+        var node = createSynthesizedNode(224 /* BreakStatement */);
+        node.label = asName(label);
+        return node;
+    }
+    ts.createBreak = createBreak;
+    function updateBreak(node, label) {
+        return node.label !== label
+            ? updateNode(createBreak(label), node)
+            : node;
+    }
+    ts.updateBreak = updateBreak;
+    function createReturn(expression) {
+        var node = createSynthesizedNode(225 /* ReturnStatement */);
+        node.expression = expression;
+        return node;
+    }
+    ts.createReturn = createReturn;
+    function updateReturn(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createReturn(expression), node)
+            : node;
+    }
+    ts.updateReturn = updateReturn;
+    function createWith(expression, statement) {
+        var node = createSynthesizedNode(226 /* WithStatement */);
+        node.expression = expression;
+        node.statement = statement;
+        return node;
+    }
+    ts.createWith = createWith;
+    function updateWith(node, expression, statement) {
+        return node.expression !== expression
+            || node.statement !== statement
+            ? updateNode(createWith(expression, statement), node)
+            : node;
+    }
+    ts.updateWith = updateWith;
+    function createSwitch(expression, caseBlock) {
+        var node = createSynthesizedNode(227 /* SwitchStatement */);
+        node.expression = ts.parenthesizeExpressionForList(expression);
+        node.caseBlock = caseBlock;
+        return node;
+    }
+    ts.createSwitch = createSwitch;
+    function updateSwitch(node, expression, caseBlock) {
+        return node.expression !== expression
+            || node.caseBlock !== caseBlock
+            ? updateNode(createSwitch(expression, caseBlock), node)
+            : node;
+    }
+    ts.updateSwitch = updateSwitch;
+    function createLabel(label, statement) {
+        var node = createSynthesizedNode(228 /* LabeledStatement */);
+        node.label = asName(label);
+        node.statement = statement;
+        return node;
+    }
+    ts.createLabel = createLabel;
+    function updateLabel(node, label, statement) {
+        return node.label !== label
+            || node.statement !== statement
+            ? updateNode(createLabel(label, statement), node)
+            : node;
+    }
+    ts.updateLabel = updateLabel;
+    function createThrow(expression) {
+        var node = createSynthesizedNode(229 /* ThrowStatement */);
+        node.expression = expression;
+        return node;
+    }
+    ts.createThrow = createThrow;
+    function updateThrow(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createThrow(expression), node)
+            : node;
+    }
+    ts.updateThrow = updateThrow;
+    function createTry(tryBlock, catchClause, finallyBlock) {
+        var node = createSynthesizedNode(230 /* TryStatement */);
+        node.tryBlock = tryBlock;
+        node.catchClause = catchClause;
+        node.finallyBlock = finallyBlock;
+        return node;
+    }
+    ts.createTry = createTry;
+    function updateTry(node, tryBlock, catchClause, finallyBlock) {
+        return node.tryBlock !== tryBlock
+            || node.catchClause !== catchClause
+            || node.finallyBlock !== finallyBlock
+            ? updateNode(createTry(tryBlock, catchClause, finallyBlock), node)
+            : node;
+    }
+    ts.updateTry = updateTry;
+    function createDebuggerStatement() {
+        return createSynthesizedNode(231 /* DebuggerStatement */);
+    }
+    ts.createDebuggerStatement = createDebuggerStatement;
+    function createVariableDeclaration(name, type, initializer) {
+        var node = createSynthesizedNode(232 /* VariableDeclaration */);
+        node.name = asName(name);
+        node.type = type;
+        node.initializer = initializer !== undefined ? ts.parenthesizeExpressionForList(initializer) : undefined;
+        return node;
+    }
+    ts.createVariableDeclaration = createVariableDeclaration;
+    function updateVariableDeclaration(node, name, type, initializer) {
+        return node.name !== name
+            || node.type !== type
+            || node.initializer !== initializer
+            ? updateNode(createVariableDeclaration(name, type, initializer), node)
+            : node;
+    }
+    ts.updateVariableDeclaration = updateVariableDeclaration;
+    function createVariableDeclarationList(declarations, flags) {
+        if (flags === void 0) { flags = 0 /* None */; }
+        var node = createSynthesizedNode(233 /* VariableDeclarationList */);
+        node.flags |= flags & 3 /* BlockScoped */;
+        node.declarations = createNodeArray(declarations);
+        return node;
+    }
+    ts.createVariableDeclarationList = createVariableDeclarationList;
+    function updateVariableDeclarationList(node, declarations) {
+        return node.declarations !== declarations
+            ? updateNode(createVariableDeclarationList(declarations, node.flags), node)
+            : node;
+    }
+    ts.updateVariableDeclarationList = updateVariableDeclarationList;
+    function createFunctionDeclaration(decorators, modifiers, asteriskToken, name, typeParameters, parameters, type, body) {
+        var node = createSynthesizedNode(234 /* FunctionDeclaration */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.asteriskToken = asteriskToken;
+        node.name = asName(name);
+        node.typeParameters = asNodeArray(typeParameters);
+        node.parameters = createNodeArray(parameters);
+        node.type = type;
+        node.body = body;
+        return node;
+    }
+    ts.createFunctionDeclaration = createFunctionDeclaration;
+    function updateFunctionDeclaration(node, decorators, modifiers, asteriskToken, name, typeParameters, parameters, type, body) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.asteriskToken !== asteriskToken
+            || node.name !== name
+            || node.typeParameters !== typeParameters
+            || node.parameters !== parameters
+            || node.type !== type
+            || node.body !== body
+            ? updateNode(createFunctionDeclaration(decorators, modifiers, asteriskToken, name, typeParameters, parameters, type, body), node)
+            : node;
+    }
+    ts.updateFunctionDeclaration = updateFunctionDeclaration;
+    function createClassDeclaration(decorators, modifiers, name, typeParameters, heritageClauses, members) {
+        var node = createSynthesizedNode(235 /* ClassDeclaration */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.name = asName(name);
+        node.typeParameters = asNodeArray(typeParameters);
+        node.heritageClauses = asNodeArray(heritageClauses);
+        node.members = createNodeArray(members);
+        return node;
+    }
+    ts.createClassDeclaration = createClassDeclaration;
+    function updateClassDeclaration(node, decorators, modifiers, name, typeParameters, heritageClauses, members) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.name !== name
+            || node.typeParameters !== typeParameters
+            || node.heritageClauses !== heritageClauses
+            || node.members !== members
+            ? updateNode(createClassDeclaration(decorators, modifiers, name, typeParameters, heritageClauses, members), node)
+            : node;
+    }
+    ts.updateClassDeclaration = updateClassDeclaration;
+    function createInterfaceDeclaration(decorators, modifiers, name, typeParameters, heritageClauses, members) {
+        var node = createSynthesizedNode(236 /* InterfaceDeclaration */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.name = asName(name);
+        node.typeParameters = asNodeArray(typeParameters);
+        node.heritageClauses = asNodeArray(heritageClauses);
+        node.members = createNodeArray(members);
+        return node;
+    }
+    ts.createInterfaceDeclaration = createInterfaceDeclaration;
+    function updateInterfaceDeclaration(node, decorators, modifiers, name, typeParameters, heritageClauses, members) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.name !== name
+            || node.typeParameters !== typeParameters
+            || node.heritageClauses !== heritageClauses
+            || node.members !== members
+            ? updateNode(createInterfaceDeclaration(decorators, modifiers, name, typeParameters, heritageClauses, members), node)
+            : node;
+    }
+    ts.updateInterfaceDeclaration = updateInterfaceDeclaration;
+    function createTypeAliasDeclaration(decorators, modifiers, name, typeParameters, type) {
+        var node = createSynthesizedNode(237 /* TypeAliasDeclaration */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.name = asName(name);
+        node.typeParameters = asNodeArray(typeParameters);
+        node.type = type;
+        return node;
+    }
+    ts.createTypeAliasDeclaration = createTypeAliasDeclaration;
+    function updateTypeAliasDeclaration(node, decorators, modifiers, name, typeParameters, type) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.name !== name
+            || node.typeParameters !== typeParameters
+            || node.type !== type
+            ? updateNode(createTypeAliasDeclaration(decorators, modifiers, name, typeParameters, type), node)
+            : node;
+    }
+    ts.updateTypeAliasDeclaration = updateTypeAliasDeclaration;
+    function createEnumDeclaration(decorators, modifiers, name, members) {
+        var node = createSynthesizedNode(238 /* EnumDeclaration */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.name = asName(name);
+        node.members = createNodeArray(members);
+        return node;
+    }
+    ts.createEnumDeclaration = createEnumDeclaration;
+    function updateEnumDeclaration(node, decorators, modifiers, name, members) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.name !== name
+            || node.members !== members
+            ? updateNode(createEnumDeclaration(decorators, modifiers, name, members), node)
+            : node;
+    }
+    ts.updateEnumDeclaration = updateEnumDeclaration;
+    function createModuleDeclaration(decorators, modifiers, name, body, flags) {
+        if (flags === void 0) { flags = 0 /* None */; }
+        var node = createSynthesizedNode(239 /* ModuleDeclaration */);
+        node.flags |= flags & (16 /* Namespace */ | 4 /* NestedNamespace */ | 512 /* GlobalAugmentation */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.name = name;
+        node.body = body;
+        return node;
+    }
+    ts.createModuleDeclaration = createModuleDeclaration;
+    function updateModuleDeclaration(node, decorators, modifiers, name, body) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.name !== name
+            || node.body !== body
+            ? updateNode(createModuleDeclaration(decorators, modifiers, name, body, node.flags), node)
+            : node;
+    }
+    ts.updateModuleDeclaration = updateModuleDeclaration;
+    function createModuleBlock(statements) {
+        var node = createSynthesizedNode(240 /* ModuleBlock */);
+        node.statements = createNodeArray(statements);
+        return node;
+    }
+    ts.createModuleBlock = createModuleBlock;
+    function updateModuleBlock(node, statements) {
+        return node.statements !== statements
+            ? updateNode(createModuleBlock(statements), node)
+            : node;
+    }
+    ts.updateModuleBlock = updateModuleBlock;
+    function createCaseBlock(clauses) {
+        var node = createSynthesizedNode(241 /* CaseBlock */);
+        node.clauses = createNodeArray(clauses);
+        return node;
+    }
+    ts.createCaseBlock = createCaseBlock;
+    function updateCaseBlock(node, clauses) {
+        return node.clauses !== clauses
+            ? updateNode(createCaseBlock(clauses), node)
+            : node;
+    }
+    ts.updateCaseBlock = updateCaseBlock;
+    function createNamespaceExportDeclaration(name) {
+        var node = createSynthesizedNode(242 /* NamespaceExportDeclaration */);
+        node.name = asName(name);
+        return node;
+    }
+    ts.createNamespaceExportDeclaration = createNamespaceExportDeclaration;
+    function updateNamespaceExportDeclaration(node, name) {
+        return node.name !== name
+            ? updateNode(createNamespaceExportDeclaration(name), node)
+            : node;
+    }
+    ts.updateNamespaceExportDeclaration = updateNamespaceExportDeclaration;
+    function createImportEqualsDeclaration(decorators, modifiers, name, moduleReference) {
+        var node = createSynthesizedNode(243 /* ImportEqualsDeclaration */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.name = asName(name);
+        node.moduleReference = moduleReference;
+        return node;
+    }
+    ts.createImportEqualsDeclaration = createImportEqualsDeclaration;
+    function updateImportEqualsDeclaration(node, decorators, modifiers, name, moduleReference) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.name !== name
+            || node.moduleReference !== moduleReference
+            ? updateNode(createImportEqualsDeclaration(decorators, modifiers, name, moduleReference), node)
+            : node;
+    }
+    ts.updateImportEqualsDeclaration = updateImportEqualsDeclaration;
+    function createImportDeclaration(decorators, modifiers, importClause, moduleSpecifier) {
+        var node = createSynthesizedNode(244 /* ImportDeclaration */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.importClause = importClause;
+        node.moduleSpecifier = moduleSpecifier;
+        return node;
+    }
+    ts.createImportDeclaration = createImportDeclaration;
+    function updateImportDeclaration(node, decorators, modifiers, importClause, moduleSpecifier) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.importClause !== importClause
+            || node.moduleSpecifier !== moduleSpecifier
+            ? updateNode(createImportDeclaration(decorators, modifiers, importClause, moduleSpecifier), node)
+            : node;
+    }
+    ts.updateImportDeclaration = updateImportDeclaration;
+    function createImportClause(name, namedBindings) {
+        var node = createSynthesizedNode(245 /* ImportClause */);
+        node.name = name;
+        node.namedBindings = namedBindings;
+        return node;
+    }
+    ts.createImportClause = createImportClause;
+    function updateImportClause(node, name, namedBindings) {
+        return node.name !== name
+            || node.namedBindings !== namedBindings
+            ? updateNode(createImportClause(name, namedBindings), node)
+            : node;
+    }
+    ts.updateImportClause = updateImportClause;
+    function createNamespaceImport(name) {
+        var node = createSynthesizedNode(246 /* NamespaceImport */);
+        node.name = name;
+        return node;
+    }
+    ts.createNamespaceImport = createNamespaceImport;
+    function updateNamespaceImport(node, name) {
+        return node.name !== name
+            ? updateNode(createNamespaceImport(name), node)
+            : node;
+    }
+    ts.updateNamespaceImport = updateNamespaceImport;
+    function createNamedImports(elements) {
+        var node = createSynthesizedNode(247 /* NamedImports */);
+        node.elements = createNodeArray(elements);
+        return node;
+    }
+    ts.createNamedImports = createNamedImports;
+    function updateNamedImports(node, elements) {
+        return node.elements !== elements
+            ? updateNode(createNamedImports(elements), node)
+            : node;
+    }
+    ts.updateNamedImports = updateNamedImports;
+    function createImportSpecifier(propertyName, name) {
+        var node = createSynthesizedNode(248 /* ImportSpecifier */);
+        node.propertyName = propertyName;
+        node.name = name;
+        return node;
+    }
+    ts.createImportSpecifier = createImportSpecifier;
+    function updateImportSpecifier(node, propertyName, name) {
+        return node.propertyName !== propertyName
+            || node.name !== name
+            ? updateNode(createImportSpecifier(propertyName, name), node)
+            : node;
+    }
+    ts.updateImportSpecifier = updateImportSpecifier;
+    function createExportAssignment(decorators, modifiers, isExportEquals, expression) {
+        var node = createSynthesizedNode(249 /* ExportAssignment */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.isExportEquals = isExportEquals;
+        node.expression = isExportEquals ? ts.parenthesizeBinaryOperand(58 /* EqualsToken */, expression, /*isLeftSideOfBinary*/ false, /*leftOperand*/ undefined) : ts.parenthesizeDefaultExpression(expression);
+        return node;
+    }
+    ts.createExportAssignment = createExportAssignment;
+    function updateExportAssignment(node, decorators, modifiers, expression) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.expression !== expression
+            ? updateNode(createExportAssignment(decorators, modifiers, node.isExportEquals, expression), node)
+            : node;
+    }
+    ts.updateExportAssignment = updateExportAssignment;
+    function createExportDeclaration(decorators, modifiers, exportClause, moduleSpecifier) {
+        var node = createSynthesizedNode(250 /* ExportDeclaration */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.exportClause = exportClause;
+        node.moduleSpecifier = moduleSpecifier;
+        return node;
+    }
+    ts.createExportDeclaration = createExportDeclaration;
+    function updateExportDeclaration(node, decorators, modifiers, exportClause, moduleSpecifier) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.exportClause !== exportClause
+            || node.moduleSpecifier !== moduleSpecifier
+            ? updateNode(createExportDeclaration(decorators, modifiers, exportClause, moduleSpecifier), node)
+            : node;
+    }
+    ts.updateExportDeclaration = updateExportDeclaration;
+    function createNamedExports(elements) {
+        var node = createSynthesizedNode(251 /* NamedExports */);
+        node.elements = createNodeArray(elements);
+        return node;
+    }
+    ts.createNamedExports = createNamedExports;
+    function updateNamedExports(node, elements) {
+        return node.elements !== elements
+            ? updateNode(createNamedExports(elements), node)
+            : node;
+    }
+    ts.updateNamedExports = updateNamedExports;
+    function createExportSpecifier(propertyName, name) {
+        var node = createSynthesizedNode(252 /* ExportSpecifier */);
+        node.propertyName = asName(propertyName);
+        node.name = asName(name);
+        return node;
+    }
+    ts.createExportSpecifier = createExportSpecifier;
+    function updateExportSpecifier(node, propertyName, name) {
+        return node.propertyName !== propertyName
+            || node.name !== name
+            ? updateNode(createExportSpecifier(propertyName, name), node)
+            : node;
+    }
+    ts.updateExportSpecifier = updateExportSpecifier;
+    // Module references
+    function createExternalModuleReference(expression) {
+        var node = createSynthesizedNode(254 /* ExternalModuleReference */);
+        node.expression = expression;
+        return node;
+    }
+    ts.createExternalModuleReference = createExternalModuleReference;
+    function updateExternalModuleReference(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createExternalModuleReference(expression), node)
+            : node;
+    }
+    ts.updateExternalModuleReference = updateExternalModuleReference;
+    // JSX
+    function createJsxElement(openingElement, children, closingElement) {
+        var node = createSynthesizedNode(255 /* JsxElement */);
+        node.openingElement = openingElement;
+        node.children = createNodeArray(children);
+        node.closingElement = closingElement;
+        return node;
+    }
+    ts.createJsxElement = createJsxElement;
+    function updateJsxElement(node, openingElement, children, closingElement) {
+        return node.openingElement !== openingElement
+            || node.children !== children
+            || node.closingElement !== closingElement
+            ? updateNode(createJsxElement(openingElement, children, closingElement), node)
+            : node;
+    }
+    ts.updateJsxElement = updateJsxElement;
+    function createJsxSelfClosingElement(tagName, typeArguments, attributes) {
+        var node = createSynthesizedNode(256 /* JsxSelfClosingElement */);
+        node.tagName = tagName;
+        node.typeArguments = typeArguments && createNodeArray(typeArguments);
+        node.attributes = attributes;
+        return node;
+    }
+    ts.createJsxSelfClosingElement = createJsxSelfClosingElement;
+    function updateJsxSelfClosingElement(node, tagName, typeArguments, attributes) {
+        return node.tagName !== tagName
+            || node.typeArguments !== typeArguments
+            || node.attributes !== attributes
+            ? updateNode(createJsxSelfClosingElement(tagName, typeArguments, attributes), node)
+            : node;
+    }
+    ts.updateJsxSelfClosingElement = updateJsxSelfClosingElement;
+    function createJsxOpeningElement(tagName, typeArguments, attributes) {
+        var node = createSynthesizedNode(257 /* JsxOpeningElement */);
+        node.tagName = tagName;
+        node.typeArguments = typeArguments && createNodeArray(typeArguments);
+        node.attributes = attributes;
+        return node;
+    }
+    ts.createJsxOpeningElement = createJsxOpeningElement;
+    function updateJsxOpeningElement(node, tagName, typeArguments, attributes) {
+        return node.tagName !== tagName
+            || node.typeArguments !== typeArguments
+            || node.attributes !== attributes
+            ? updateNode(createJsxOpeningElement(tagName, typeArguments, attributes), node)
+            : node;
+    }
+    ts.updateJsxOpeningElement = updateJsxOpeningElement;
+    function createJsxClosingElement(tagName) {
+        var node = createSynthesizedNode(258 /* JsxClosingElement */);
+        node.tagName = tagName;
+        return node;
+    }
+    ts.createJsxClosingElement = createJsxClosingElement;
+    function updateJsxClosingElement(node, tagName) {
+        return node.tagName !== tagName
+            ? updateNode(createJsxClosingElement(tagName), node)
+            : node;
+    }
+    ts.updateJsxClosingElement = updateJsxClosingElement;
+    function createJsxFragment(openingFragment, children, closingFragment) {
+        var node = createSynthesizedNode(259 /* JsxFragment */);
+        node.openingFragment = openingFragment;
+        node.children = createNodeArray(children);
+        node.closingFragment = closingFragment;
+        return node;
+    }
+    ts.createJsxFragment = createJsxFragment;
+    function updateJsxFragment(node, openingFragment, children, closingFragment) {
+        return node.openingFragment !== openingFragment
+            || node.children !== children
+            || node.closingFragment !== closingFragment
+            ? updateNode(createJsxFragment(openingFragment, children, closingFragment), node)
+            : node;
+    }
+    ts.updateJsxFragment = updateJsxFragment;
+    function createJsxAttribute(name, initializer) {
+        var node = createSynthesizedNode(262 /* JsxAttribute */);
+        node.name = name;
+        node.initializer = initializer;
+        return node;
+    }
+    ts.createJsxAttribute = createJsxAttribute;
+    function updateJsxAttribute(node, name, initializer) {
+        return node.name !== name
+            || node.initializer !== initializer
+            ? updateNode(createJsxAttribute(name, initializer), node)
+            : node;
+    }
+    ts.updateJsxAttribute = updateJsxAttribute;
+    function createJsxAttributes(properties) {
+        var node = createSynthesizedNode(263 /* JsxAttributes */);
+        node.properties = createNodeArray(properties);
+        return node;
+    }
+    ts.createJsxAttributes = createJsxAttributes;
+    function updateJsxAttributes(node, properties) {
+        return node.properties !== properties
+            ? updateNode(createJsxAttributes(properties), node)
+            : node;
+    }
+    ts.updateJsxAttributes = updateJsxAttributes;
+    function createJsxSpreadAttribute(expression) {
+        var node = createSynthesizedNode(264 /* JsxSpreadAttribute */);
+        node.expression = expression;
+        return node;
+    }
+    ts.createJsxSpreadAttribute = createJsxSpreadAttribute;
+    function updateJsxSpreadAttribute(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createJsxSpreadAttribute(expression), node)
+            : node;
+    }
+    ts.updateJsxSpreadAttribute = updateJsxSpreadAttribute;
+    function createJsxExpression(dotDotDotToken, expression) {
+        var node = createSynthesizedNode(265 /* JsxExpression */);
+        node.dotDotDotToken = dotDotDotToken;
+        node.expression = expression;
+        return node;
+    }
+    ts.createJsxExpression = createJsxExpression;
+    function updateJsxExpression(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createJsxExpression(node.dotDotDotToken, expression), node)
+            : node;
+    }
+    ts.updateJsxExpression = updateJsxExpression;
+    // Clauses
+    function createCaseClause(expression, statements) {
+        var node = createSynthesizedNode(266 /* CaseClause */);
+        node.expression = ts.parenthesizeExpressionForList(expression);
+        node.statements = createNodeArray(statements);
+        return node;
+    }
+    ts.createCaseClause = createCaseClause;
+    function updateCaseClause(node, expression, statements) {
+        return node.expression !== expression
+            || node.statements !== statements
+            ? updateNode(createCaseClause(expression, statements), node)
+            : node;
+    }
+    ts.updateCaseClause = updateCaseClause;
+    function createDefaultClause(statements) {
+        var node = createSynthesizedNode(267 /* DefaultClause */);
+        node.statements = createNodeArray(statements);
+        return node;
+    }
+    ts.createDefaultClause = createDefaultClause;
+    function updateDefaultClause(node, statements) {
+        return node.statements !== statements
+            ? updateNode(createDefaultClause(statements), node)
+            : node;
+    }
+    ts.updateDefaultClause = updateDefaultClause;
+    function createHeritageClause(token, types) {
+        var node = createSynthesizedNode(268 /* HeritageClause */);
+        node.token = token;
+        node.types = createNodeArray(types);
+        return node;
+    }
+    ts.createHeritageClause = createHeritageClause;
+    function updateHeritageClause(node, types) {
+        return node.types !== types
+            ? updateNode(createHeritageClause(node.token, types), node)
+            : node;
+    }
+    ts.updateHeritageClause = updateHeritageClause;
+    function createCatchClause(variableDeclaration, block) {
+        var node = createSynthesizedNode(269 /* CatchClause */);
+        node.variableDeclaration = ts.isString(variableDeclaration) ? createVariableDeclaration(variableDeclaration) : variableDeclaration;
+        node.block = block;
+        return node;
+    }
+    ts.createCatchClause = createCatchClause;
+    function updateCatchClause(node, variableDeclaration, block) {
+        return node.variableDeclaration !== variableDeclaration
+            || node.block !== block
+            ? updateNode(createCatchClause(variableDeclaration, block), node)
+            : node;
+    }
+    ts.updateCatchClause = updateCatchClause;
+    // Property assignments
+    function createPropertyAssignment(name, initializer) {
+        var node = createSynthesizedNode(270 /* PropertyAssignment */);
+        node.name = asName(name);
+        node.questionToken = undefined;
+        node.initializer = ts.parenthesizeExpressionForList(initializer);
+        return node;
+    }
+    ts.createPropertyAssignment = createPropertyAssignment;
+    function updatePropertyAssignment(node, name, initializer) {
+        return node.name !== name
+            || node.initializer !== initializer
+            ? updateNode(createPropertyAssignment(name, initializer), node)
+            : node;
+    }
+    ts.updatePropertyAssignment = updatePropertyAssignment;
+    function createShorthandPropertyAssignment(name, objectAssignmentInitializer) {
+        var node = createSynthesizedNode(271 /* ShorthandPropertyAssignment */);
+        node.name = asName(name);
+        node.objectAssignmentInitializer = objectAssignmentInitializer !== undefined ? ts.parenthesizeExpressionForList(objectAssignmentInitializer) : undefined;
+        return node;
+    }
+    ts.createShorthandPropertyAssignment = createShorthandPropertyAssignment;
+    function updateShorthandPropertyAssignment(node, name, objectAssignmentInitializer) {
+        return node.name !== name
+            || node.objectAssignmentInitializer !== objectAssignmentInitializer
+            ? updateNode(createShorthandPropertyAssignment(name, objectAssignmentInitializer), node)
+            : node;
+    }
+    ts.updateShorthandPropertyAssignment = updateShorthandPropertyAssignment;
+    function createSpreadAssignment(expression) {
+        var node = createSynthesizedNode(272 /* SpreadAssignment */);
+        node.expression = expression !== undefined ? ts.parenthesizeExpressionForList(expression) : undefined; // TODO: GH#18217
+        return node;
+    }
+    ts.createSpreadAssignment = createSpreadAssignment;
+    function updateSpreadAssignment(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createSpreadAssignment(expression), node)
+            : node;
+    }
+    ts.updateSpreadAssignment = updateSpreadAssignment;
+    // Enum
+    function createEnumMember(name, initializer) {
+        var node = createSynthesizedNode(273 /* EnumMember */);
+        node.name = asName(name);
+        node.initializer = initializer && ts.parenthesizeExpressionForList(initializer);
+        return node;
+    }
+    ts.createEnumMember = createEnumMember;
+    function updateEnumMember(node, name, initializer) {
+        return node.name !== name
+            || node.initializer !== initializer
+            ? updateNode(createEnumMember(name, initializer), node)
+            : node;
+    }
+    ts.updateEnumMember = updateEnumMember;
+    // Top-level nodes
+    function updateSourceFileNode(node, statements, isDeclarationFile, referencedFiles, typeReferences, hasNoDefaultLib, libReferences) {
+        if (node.statements !== statements ||
+            (isDeclarationFile !== undefined && node.isDeclarationFile !== isDeclarationFile) ||
+            (referencedFiles !== undefined && node.referencedFiles !== referencedFiles) ||
+            (typeReferences !== undefined && node.typeReferenceDirectives !== typeReferences) ||
+            (libReferences !== undefined && node.libReferenceDirectives !== libReferences) ||
+            (hasNoDefaultLib !== undefined && node.hasNoDefaultLib !== hasNoDefaultLib)) {
+            var updated = createSynthesizedNode(274 /* SourceFile */);
+            updated.flags |= node.flags;
+            updated.statements = createNodeArray(statements);
+            updated.endOfFileToken = node.endOfFileToken;
+            updated.fileName = node.fileName;
+            updated.path = node.path;
+            updated.text = node.text;
+            updated.isDeclarationFile = isDeclarationFile === undefined ? node.isDeclarationFile : isDeclarationFile;
+            updated.referencedFiles = referencedFiles === undefined ? node.referencedFiles : referencedFiles;
+            updated.typeReferenceDirectives = typeReferences === undefined ? node.typeReferenceDirectives : typeReferences;
+            updated.hasNoDefaultLib = hasNoDefaultLib === undefined ? node.hasNoDefaultLib : hasNoDefaultLib;
+            updated.libReferenceDirectives = libReferences === undefined ? node.libReferenceDirectives : libReferences;
+            if (node.amdDependencies !== undefined)
+                updated.amdDependencies = node.amdDependencies;
+            if (node.moduleName !== undefined)
+                updated.moduleName = node.moduleName;
+            if (node.languageVariant !== undefined)
+                updated.languageVariant = node.languageVariant;
+            if (node.renamedDependencies !== undefined)
+                updated.renamedDependencies = node.renamedDependencies;
+            if (node.languageVersion !== undefined)
+                updated.languageVersion = node.languageVersion;
+            if (node.scriptKind !== undefined)
+                updated.scriptKind = node.scriptKind;
+            if (node.externalModuleIndicator !== undefined)
+                updated.externalModuleIndicator = node.externalModuleIndicator;
+            if (node.commonJsModuleIndicator !== undefined)
+                updated.commonJsModuleIndicator = node.commonJsModuleIndicator;
+            if (node.identifiers !== undefined)
+                updated.identifiers = node.identifiers;
+            if (node.nodeCount !== undefined)
+                updated.nodeCount = node.nodeCount;
+            if (node.identifierCount !== undefined)
+                updated.identifierCount = node.identifierCount;
+            if (node.symbolCount !== undefined)
+                updated.symbolCount = node.symbolCount;
+            if (node.parseDiagnostics !== undefined)
+                updated.parseDiagnostics = node.parseDiagnostics;
+            if (node.bindDiagnostics !== undefined)
+                updated.bindDiagnostics = node.bindDiagnostics;
+            if (node.bindSuggestionDiagnostics !== undefined)
+                updated.bindSuggestionDiagnostics = node.bindSuggestionDiagnostics;
+            if (node.lineMap !== undefined)
+                updated.lineMap = node.lineMap;
+            if (node.classifiableNames !== undefined)
+                updated.classifiableNames = node.classifiableNames;
+            if (node.resolvedModules !== undefined)
+                updated.resolvedModules = node.resolvedModules;
+            if (node.resolvedTypeReferenceDirectiveNames !== undefined)
+                updated.resolvedTypeReferenceDirectiveNames = node.resolvedTypeReferenceDirectiveNames;
+            if (node.imports !== undefined)
+                updated.imports = node.imports;
+            if (node.moduleAugmentations !== undefined)
+                updated.moduleAugmentations = node.moduleAugmentations;
+            if (node.pragmas !== undefined)
+                updated.pragmas = node.pragmas;
+            if (node.localJsxFactory !== undefined)
+                updated.localJsxFactory = node.localJsxFactory;
+            if (node.localJsxNamespace !== undefined)
+                updated.localJsxNamespace = node.localJsxNamespace;
+            return updateNode(updated, node);
+        }
+        return node;
+    }
+    ts.updateSourceFileNode = updateSourceFileNode;
+    /**
+     * Creates a shallow, memberwise clone of a node for mutation.
+     */
+    function getMutableClone(node) {
+        var clone = getSynthesizedClone(node);
+        clone.pos = node.pos;
+        clone.end = node.end;
+        clone.parent = node.parent;
+        return clone;
+    }
+    ts.getMutableClone = getMutableClone;
+    // Transformation nodes
+    /**
+     * Creates a synthetic statement to act as a placeholder for a not-emitted statement in
+     * order to preserve comments.
+     *
+     * @param original The original statement.
+     */
+    function createNotEmittedStatement(original) {
+        var node = createSynthesizedNode(300 /* NotEmittedStatement */);
+        node.original = original;
+        setTextRange(node, original);
+        return node;
+    }
+    ts.createNotEmittedStatement = createNotEmittedStatement;
+    /**
+     * Creates a synthetic element to act as a placeholder for the end of an emitted declaration in
+     * order to properly emit exports.
+     */
+    /* @internal */
+    function createEndOfDeclarationMarker(original) {
+        var node = createSynthesizedNode(304 /* EndOfDeclarationMarker */);
+        node.emitNode = {};
+        node.original = original;
+        return node;
+    }
+    ts.createEndOfDeclarationMarker = createEndOfDeclarationMarker;
+    /**
+     * Creates a synthetic element to act as a placeholder for the beginning of a merged declaration in
+     * order to properly emit exports.
+     */
+    /* @internal */
+    function createMergeDeclarationMarker(original) {
+        var node = createSynthesizedNode(303 /* MergeDeclarationMarker */);
+        node.emitNode = {};
+        node.original = original;
+        return node;
+    }
+    ts.createMergeDeclarationMarker = createMergeDeclarationMarker;
+    /**
+     * Creates a synthetic expression to act as a placeholder for a not-emitted expression in
+     * order to preserve comments or sourcemap positions.
+     *
+     * @param expression The inner expression to emit.
+     * @param original The original outer expression.
+     * @param location The location for the expression. Defaults to the positions from "original" if provided.
+     */
+    function createPartiallyEmittedExpression(expression, original) {
+        var node = createSynthesizedNode(301 /* PartiallyEmittedExpression */);
+        node.expression = expression;
+        node.original = original;
+        setTextRange(node, original);
+        return node;
+    }
+    ts.createPartiallyEmittedExpression = createPartiallyEmittedExpression;
+    function updatePartiallyEmittedExpression(node, expression) {
+        if (node.expression !== expression) {
+            return updateNode(createPartiallyEmittedExpression(expression, node.original), node);
+        }
+        return node;
+    }
+    ts.updatePartiallyEmittedExpression = updatePartiallyEmittedExpression;
+    function flattenCommaElements(node) {
+        if (ts.nodeIsSynthesized(node) && !ts.isParseTreeNode(node) && !node.original && !node.emitNode && !node.id) {
+            if (node.kind === 302 /* CommaListExpression */) {
+                return node.elements;
+            }
+            if (ts.isBinaryExpression(node) && node.operatorToken.kind === 26 /* CommaToken */) {
+                return [node.left, node.right];
+            }
+        }
+        return node;
+    }
+    function createCommaList(elements) {
+        var node = createSynthesizedNode(302 /* CommaListExpression */);
+        node.elements = createNodeArray(ts.sameFlatMap(elements, flattenCommaElements));
+        return node;
+    }
+    ts.createCommaList = createCommaList;
+    function updateCommaList(node, elements) {
+        return node.elements !== elements
+            ? updateNode(createCommaList(elements), node)
+            : node;
+    }
+    ts.updateCommaList = updateCommaList;
+    function createBundle(sourceFiles, prepends) {
+        if (prepends === void 0) { prepends = ts.emptyArray; }
+        var node = ts.createNode(275 /* Bundle */);
+        node.prepends = prepends;
+        node.sourceFiles = sourceFiles;
+        return node;
+    }
+    ts.createBundle = createBundle;
+    function createUnparsedSourceFile(text, map) {
+        var node = ts.createNode(276 /* UnparsedSource */);
+        node.text = text;
+        node.sourceMapText = map;
+        return node;
+    }
+    ts.createUnparsedSourceFile = createUnparsedSourceFile;
+    function createInputFiles(javascript, declaration, javascriptMapText, declarationMapText) {
+        var node = ts.createNode(277 /* InputFiles */);
+        node.javascriptText = javascript;
+        node.javascriptMapText = javascriptMapText;
+        node.declarationText = declaration;
+        node.declarationMapText = declarationMapText;
+        return node;
+    }
+    ts.createInputFiles = createInputFiles;
+    function updateBundle(node, sourceFiles, prepends) {
+        if (prepends === void 0) { prepends = ts.emptyArray; }
+        if (node.sourceFiles !== sourceFiles || node.prepends !== prepends) {
+            return createBundle(sourceFiles, prepends);
+        }
+        return node;
+    }
+    ts.updateBundle = updateBundle;
+    function createImmediatelyInvokedFunctionExpression(statements, param, paramValue) {
+        return createCall(createFunctionExpression(
+        /*modifiers*/ undefined, 
+        /*asteriskToken*/ undefined, 
+        /*name*/ undefined, 
+        /*typeParameters*/ undefined, 
+        /*parameters*/ param ? [param] : [], 
+        /*type*/ undefined, createBlock(statements, /*multiLine*/ true)), 
+        /*typeArguments*/ undefined, 
+        /*argumentsArray*/ paramValue ? [paramValue] : []);
+    }
+    ts.createImmediatelyInvokedFunctionExpression = createImmediatelyInvokedFunctionExpression;
+    function createImmediatelyInvokedArrowFunction(statements, param, paramValue) {
+        return createCall(createArrowFunction(
+        /*modifiers*/ undefined, 
+        /*typeParameters*/ undefined, 
+        /*parameters*/ param ? [param] : [], 
+        /*type*/ undefined, 
+        /*equalsGreaterThanToken*/ undefined, createBlock(statements, /*multiLine*/ true)), 
+        /*typeArguments*/ undefined, 
+        /*argumentsArray*/ paramValue ? [paramValue] : []);
+    }
+    ts.createImmediatelyInvokedArrowFunction = createImmediatelyInvokedArrowFunction;
+    function createComma(left, right) {
+        return createBinary(left, 26 /* CommaToken */, right);
+    }
+    ts.createComma = createComma;
+    function createLessThan(left, right) {
+        return createBinary(left, 27 /* LessThanToken */, right);
+    }
+    ts.createLessThan = createLessThan;
+    function createAssignment(left, right) {
+        return createBinary(left, 58 /* EqualsToken */, right);
+    }
+    ts.createAssignment = createAssignment;
+    function createStrictEquality(left, right) {
+        return createBinary(left, 34 /* EqualsEqualsEqualsToken */, right);
+    }
+    ts.createStrictEquality = createStrictEquality;
+    function createStrictInequality(left, right) {
+        return createBinary(left, 35 /* ExclamationEqualsEqualsToken */, right);
+    }
+    ts.createStrictInequality = createStrictInequality;
+    function createAdd(left, right) {
+        return createBinary(left, 37 /* PlusToken */, right);
+    }
+    ts.createAdd = createAdd;
+    function createSubtract(left, right) {
+        return createBinary(left, 38 /* MinusToken */, right);
+    }
+    ts.createSubtract = createSubtract;
+    function createPostfixIncrement(operand) {
+        return createPostfix(operand, 43 /* PlusPlusToken */);
+    }
+    ts.createPostfixIncrement = createPostfixIncrement;
+    function createLogicalAnd(left, right) {
+        return createBinary(left, 53 /* AmpersandAmpersandToken */, right);
+    }
+    ts.createLogicalAnd = createLogicalAnd;
+    function createLogicalOr(left, right) {
+        return createBinary(left, 54 /* BarBarToken */, right);
+    }
+    ts.createLogicalOr = createLogicalOr;
+    function createLogicalNot(operand) {
+        return createPrefix(51 /* ExclamationToken */, operand);
+    }
+    ts.createLogicalNot = createLogicalNot;
+    function createVoidZero() {
+        return createVoid(createLiteral(0));
+    }
+    ts.createVoidZero = createVoidZero;
+    function createExportDefault(expression) {
+        return createExportAssignment(/*decorators*/ undefined, /*modifiers*/ undefined, /*isExportEquals*/ false, expression);
+    }
+    ts.createExportDefault = createExportDefault;
+    function createExternalModuleExport(exportName) {
+        return createExportDeclaration(/*decorators*/ undefined, /*modifiers*/ undefined, createNamedExports([createExportSpecifier(/*propertyName*/ undefined, exportName)]));
+    }
+    ts.createExternalModuleExport = createExternalModuleExport;
+    // Utilities
+    function asName(name) {
+        return ts.isString(name) ? createIdentifier(name) : name;
+    }
+    function asExpression(value) {
+        return ts.isString(value) || typeof value === "number" ? createLiteral(value) : value;
+    }
+    function asNodeArray(array) {
+        return array ? createNodeArray(array) : undefined;
+    }
+    function asToken(value) {
+        return typeof value === "number" ? createToken(value) : value;
+    }
+    /**
+     * Clears any EmitNode entries from parse-tree nodes.
+     * @param sourceFile A source file.
+     */
+    function disposeEmitNodes(sourceFile) {
+        // During transformation we may need to annotate a parse tree node with transient
+        // transformation properties. As parse tree nodes live longer than transformation
+        // nodes, we need to make sure we reclaim any memory allocated for custom ranges
+        // from these nodes to ensure we do not hold onto entire subtrees just for position
+        // information. We also need to reset these nodes to a pre-transformation state
+        // for incremental parsing scenarios so that we do not impact later emit.
+        sourceFile = ts.getSourceFileOfNode(ts.getParseTreeNode(sourceFile));
+        var emitNode = sourceFile && sourceFile.emitNode;
+        var annotatedNodes = emitNode && emitNode.annotatedNodes;
+        if (annotatedNodes) {
+            for (var _i = 0, annotatedNodes_1 = annotatedNodes; _i < annotatedNodes_1.length; _i++) {
+                var node = annotatedNodes_1[_i];
+                node.emitNode = undefined;
+            }
+        }
+    }
+    ts.disposeEmitNodes = disposeEmitNodes;
+    /**
+     * Associates a node with the current transformation, initializing
+     * various transient transformation properties.
+     */
+    /* @internal */
+    function getOrCreateEmitNode(node) {
+        if (!node.emitNode) {
+            if (ts.isParseTreeNode(node)) {
+                // To avoid holding onto transformation artifacts, we keep track of any
+                // parse tree node we are annotating. This allows us to clean them up after
+                // all transformations have completed.
+                if (node.kind === 274 /* SourceFile */) {
+                    return node.emitNode = { annotatedNodes: [node] };
+                }
+                var sourceFile = ts.getSourceFileOfNode(node);
+                getOrCreateEmitNode(sourceFile).annotatedNodes.push(node);
+            }
+            node.emitNode = {};
+        }
+        return node.emitNode;
+    }
+    ts.getOrCreateEmitNode = getOrCreateEmitNode;
+    function setTextRange(range, location) {
+        if (location) {
+            range.pos = location.pos;
+            range.end = location.end;
+        }
+        return range;
+    }
+    ts.setTextRange = setTextRange;
+    /**
+     * Sets flags that control emit behavior of a node.
+     */
+    function setEmitFlags(node, emitFlags) {
+        getOrCreateEmitNode(node).flags = emitFlags;
+        return node;
+    }
+    ts.setEmitFlags = setEmitFlags;
+    /**
+     * Sets flags that control emit behavior of a node.
+     */
+    /* @internal */
+    function addEmitFlags(node, emitFlags) {
+        var emitNode = getOrCreateEmitNode(node);
+        emitNode.flags = emitNode.flags | emitFlags;
+        return node;
+    }
+    ts.addEmitFlags = addEmitFlags;
+    /**
+     * Gets a custom text range to use when emitting source maps.
+     */
+    function getSourceMapRange(node) {
+        var emitNode = node.emitNode;
+        return (emitNode && emitNode.sourceMapRange) || node;
+    }
+    ts.getSourceMapRange = getSourceMapRange;
+    /**
+     * Sets a custom text range to use when emitting source maps.
+     */
+    function setSourceMapRange(node, range) {
+        getOrCreateEmitNode(node).sourceMapRange = range;
+        return node;
+    }
+    ts.setSourceMapRange = setSourceMapRange;
+    // tslint:disable-next-line variable-name
+    var SourceMapSource;
+    /**
+     * Create an external source map source file reference
+     */
+    function createSourceMapSource(fileName, text, skipTrivia) {
+        return new (SourceMapSource || (SourceMapSource = ts.objectAllocator.getSourceMapSourceConstructor()))(fileName, text, skipTrivia);
+    }
+    ts.createSourceMapSource = createSourceMapSource;
+    /**
+     * Gets the TextRange to use for source maps for a token of a node.
+     */
+    function getTokenSourceMapRange(node, token) {
+        var emitNode = node.emitNode;
+        var tokenSourceMapRanges = emitNode && emitNode.tokenSourceMapRanges;
+        return tokenSourceMapRanges && tokenSourceMapRanges[token];
+    }
+    ts.getTokenSourceMapRange = getTokenSourceMapRange;
+    /**
+     * Sets the TextRange to use for source maps for a token of a node.
+     */
+    function setTokenSourceMapRange(node, token, range) {
+        var emitNode = getOrCreateEmitNode(node);
+        var tokenSourceMapRanges = emitNode.tokenSourceMapRanges || (emitNode.tokenSourceMapRanges = []);
+        tokenSourceMapRanges[token] = range;
+        return node;
+    }
+    ts.setTokenSourceMapRange = setTokenSourceMapRange;
+    /**
+     * Gets a custom text range to use when emitting comments.
+     */
+    /*@internal*/
+    function getStartsOnNewLine(node) {
+        var emitNode = node.emitNode;
+        return emitNode && emitNode.startsOnNewLine;
+    }
+    ts.getStartsOnNewLine = getStartsOnNewLine;
+    /**
+     * Sets a custom text range to use when emitting comments.
+     */
+    /*@internal*/
+    function setStartsOnNewLine(node, newLine) {
+        getOrCreateEmitNode(node).startsOnNewLine = newLine;
+        return node;
+    }
+    ts.setStartsOnNewLine = setStartsOnNewLine;
+    /**
+     * Gets a custom text range to use when emitting comments.
+     */
+    function getCommentRange(node) {
+        var emitNode = node.emitNode;
+        return (emitNode && emitNode.commentRange) || node;
+    }
+    ts.getCommentRange = getCommentRange;
+    /**
+     * Sets a custom text range to use when emitting comments.
+     */
+    function setCommentRange(node, range) {
+        getOrCreateEmitNode(node).commentRange = range;
+        return node;
+    }
+    ts.setCommentRange = setCommentRange;
+    function getSyntheticLeadingComments(node) {
+        var emitNode = node.emitNode;
+        return emitNode && emitNode.leadingComments;
+    }
+    ts.getSyntheticLeadingComments = getSyntheticLeadingComments;
+    function setSyntheticLeadingComments(node, comments) {
+        getOrCreateEmitNode(node).leadingComments = comments;
+        return node;
+    }
+    ts.setSyntheticLeadingComments = setSyntheticLeadingComments;
+    function addSyntheticLeadingComment(node, kind, text, hasTrailingNewLine) {
+        return setSyntheticLeadingComments(node, ts.append(getSyntheticLeadingComments(node), { kind: kind, pos: -1, end: -1, hasTrailingNewLine: hasTrailingNewLine, text: text }));
+    }
+    ts.addSyntheticLeadingComment = addSyntheticLeadingComment;
+    function getSyntheticTrailingComments(node) {
+        var emitNode = node.emitNode;
+        return emitNode && emitNode.trailingComments;
+    }
+    ts.getSyntheticTrailingComments = getSyntheticTrailingComments;
+    function setSyntheticTrailingComments(node, comments) {
+        getOrCreateEmitNode(node).trailingComments = comments;
+        return node;
+    }
+    ts.setSyntheticTrailingComments = setSyntheticTrailingComments;
+    function addSyntheticTrailingComment(node, kind, text, hasTrailingNewLine) {
+        return setSyntheticTrailingComments(node, ts.append(getSyntheticTrailingComments(node), { kind: kind, pos: -1, end: -1, hasTrailingNewLine: hasTrailingNewLine, text: text }));
+    }
+    ts.addSyntheticTrailingComment = addSyntheticTrailingComment;
+    function moveSyntheticComments(node, original) {
+        setSyntheticLeadingComments(node, getSyntheticLeadingComments(original));
+        setSyntheticTrailingComments(node, getSyntheticTrailingComments(original));
+        var emit = getOrCreateEmitNode(original);
+        emit.leadingComments = undefined;
+        emit.trailingComments = undefined;
+        return node;
+    }
+    ts.moveSyntheticComments = moveSyntheticComments;
+    /**
+     * Gets the constant value to emit for an expression.
+     */
+    function getConstantValue(node) {
+        var emitNode = node.emitNode;
+        return emitNode && emitNode.constantValue;
+    }
+    ts.getConstantValue = getConstantValue;
+    /**
+     * Sets the constant value to emit for an expression.
+     */
+    function setConstantValue(node, value) {
+        var emitNode = getOrCreateEmitNode(node);
+        emitNode.constantValue = value;
+        return node;
+    }
+    ts.setConstantValue = setConstantValue;
+    /**
+     * Adds an EmitHelper to a node.
+     */
+    function addEmitHelper(node, helper) {
+        var emitNode = getOrCreateEmitNode(node);
+        emitNode.helpers = ts.append(emitNode.helpers, helper);
+        return node;
+    }
+    ts.addEmitHelper = addEmitHelper;
+    /**
+     * Add EmitHelpers to a node.
+     */
+    function addEmitHelpers(node, helpers) {
+        if (ts.some(helpers)) {
+            var emitNode = getOrCreateEmitNode(node);
+            for (var _i = 0, helpers_1 = helpers; _i < helpers_1.length; _i++) {
+                var helper = helpers_1[_i];
+                emitNode.helpers = ts.appendIfUnique(emitNode.helpers, helper);
+            }
+        }
+        return node;
+    }
+    ts.addEmitHelpers = addEmitHelpers;
+    /**
+     * Removes an EmitHelper from a node.
+     */
+    function removeEmitHelper(node, helper) {
+        var emitNode = node.emitNode;
+        if (emitNode) {
+            var helpers = emitNode.helpers;
+            if (helpers) {
+                return ts.orderedRemoveItem(helpers, helper);
+            }
+        }
+        return false;
+    }
+    ts.removeEmitHelper = removeEmitHelper;
+    /**
+     * Gets the EmitHelpers of a node.
+     */
+    function getEmitHelpers(node) {
+        var emitNode = node.emitNode;
+        return emitNode && emitNode.helpers;
+    }
+    ts.getEmitHelpers = getEmitHelpers;
+    /**
+     * Moves matching emit helpers from a source node to a target node.
+     */
+    function moveEmitHelpers(source, target, predicate) {
+        var sourceEmitNode = source.emitNode;
+        var sourceEmitHelpers = sourceEmitNode && sourceEmitNode.helpers;
+        if (!ts.some(sourceEmitHelpers))
+            return;
+        var targetEmitNode = getOrCreateEmitNode(target);
+        var helpersRemoved = 0;
+        for (var i = 0; i < sourceEmitHelpers.length; i++) {
+            var helper = sourceEmitHelpers[i];
+            if (predicate(helper)) {
+                helpersRemoved++;
+                targetEmitNode.helpers = ts.appendIfUnique(targetEmitNode.helpers, helper);
+            }
+            else if (helpersRemoved > 0) {
+                sourceEmitHelpers[i - helpersRemoved] = helper;
+            }
+        }
+        if (helpersRemoved > 0) {
+            sourceEmitHelpers.length -= helpersRemoved;
+        }
+    }
+    ts.moveEmitHelpers = moveEmitHelpers;
+    /* @internal */
+    function compareEmitHelpers(x, y) {
+        if (x === y)
+            return 0 /* EqualTo */;
+        if (x.priority === y.priority)
+            return 0 /* EqualTo */;
+        if (x.priority === undefined)
+            return 1 /* GreaterThan */;
+        if (y.priority === undefined)
+            return -1 /* LessThan */;
+        return ts.compareValues(x.priority, y.priority);
+    }
+    ts.compareEmitHelpers = compareEmitHelpers;
+    function setOriginalNode(node, original) {
+        node.original = original;
+        if (original) {
+            var emitNode = original.emitNode;
+            if (emitNode)
+                node.emitNode = mergeEmitNode(emitNode, node.emitNode);
+        }
+        return node;
+    }
+    ts.setOriginalNode = setOriginalNode;
+    function mergeEmitNode(sourceEmitNode, destEmitNode) {
+        var flags = sourceEmitNode.flags, leadingComments = sourceEmitNode.leadingComments, trailingComments = sourceEmitNode.trailingComments, commentRange = sourceEmitNode.commentRange, sourceMapRange = sourceEmitNode.sourceMapRange, tokenSourceMapRanges = sourceEmitNode.tokenSourceMapRanges, constantValue = sourceEmitNode.constantValue, helpers = sourceEmitNode.helpers, startsOnNewLine = sourceEmitNode.startsOnNewLine;
+        if (!destEmitNode)
+            destEmitNode = {};
+        // We are using `.slice()` here in case `destEmitNode.leadingComments` is pushed to later.
+        if (leadingComments)
+            destEmitNode.leadingComments = ts.addRange(leadingComments.slice(), destEmitNode.leadingComments);
+        if (trailingComments)
+            destEmitNode.trailingComments = ts.addRange(trailingComments.slice(), destEmitNode.trailingComments);
+        if (flags)
+            destEmitNode.flags = flags;
+        if (commentRange)
+            destEmitNode.commentRange = commentRange;
+        if (sourceMapRange)
+            destEmitNode.sourceMapRange = sourceMapRange;
+        if (tokenSourceMapRanges)
+            destEmitNode.tokenSourceMapRanges = mergeTokenSourceMapRanges(tokenSourceMapRanges, destEmitNode.tokenSourceMapRanges);
+        if (constantValue !== undefined)
+            destEmitNode.constantValue = constantValue;
+        if (helpers)
+            destEmitNode.helpers = ts.addRange(destEmitNode.helpers, helpers);
+        if (startsOnNewLine !== undefined)
+            destEmitNode.startsOnNewLine = startsOnNewLine;
+        return destEmitNode;
+    }
+    function mergeTokenSourceMapRanges(sourceRanges, destRanges) {
+        if (!destRanges)
+            destRanges = [];
+        for (var key in sourceRanges) {
+            destRanges[key] = sourceRanges[key];
+        }
+        return destRanges;
+    }
+})(ts || (ts = {}));
+/* @internal */
+(function (ts) {
+    ts.nullTransformationContext = {
+        enableEmitNotification: ts.noop,
+        enableSubstitution: ts.noop,
+        endLexicalEnvironment: function () { return undefined; },
+        getCompilerOptions: ts.notImplemented,
+        getEmitHost: ts.notImplemented,
+        getEmitResolver: ts.notImplemented,
+        hoistFunctionDeclaration: ts.noop,
+        hoistVariableDeclaration: ts.noop,
+        isEmitNotificationEnabled: ts.notImplemented,
+        isSubstitutionEnabled: ts.notImplemented,
+        onEmitNode: ts.noop,
+        onSubstituteNode: ts.notImplemented,
+        readEmitHelpers: ts.notImplemented,
+        requestEmitHelper: ts.noop,
+        resumeLexicalEnvironment: ts.noop,
+        startLexicalEnvironment: ts.noop,
+        suspendLexicalEnvironment: ts.noop,
+        addDiagnostic: ts.noop,
+    };
+    function createTypeCheck(value, tag) {
+        return tag === "undefined"
+            ? ts.createStrictEquality(value, ts.createVoidZero())
+            : ts.createStrictEquality(ts.createTypeOf(value), ts.createLiteral(tag));
+    }
+    ts.createTypeCheck = createTypeCheck;
+    function createMemberAccessForPropertyName(target, memberName, location) {
+        if (ts.isComputedPropertyName(memberName)) {
+            return ts.setTextRange(ts.createElementAccess(target, memberName.expression), location);
+        }
+        else {
+            var expression = ts.setTextRange(ts.isIdentifier(memberName)
+                ? ts.createPropertyAccess(target, memberName)
+                : ts.createElementAccess(target, memberName), memberName);
+            ts.getOrCreateEmitNode(expression).flags |= 64 /* NoNestedSourceMaps */;
+            return expression;
+        }
+    }
+    ts.createMemberAccessForPropertyName = createMemberAccessForPropertyName;
+    function createFunctionCall(func, thisArg, argumentsList, location) {
+        return ts.setTextRange(ts.createCall(ts.createPropertyAccess(func, "call"), 
+        /*typeArguments*/ undefined, [
+            thisArg
+        ].concat(argumentsList)), location);
+    }
+    ts.createFunctionCall = createFunctionCall;
+    function createFunctionApply(func, thisArg, argumentsExpression, location) {
+        return ts.setTextRange(ts.createCall(ts.createPropertyAccess(func, "apply"), 
+        /*typeArguments*/ undefined, [
+            thisArg,
+            argumentsExpression
+        ]), location);
+    }
+    ts.createFunctionApply = createFunctionApply;
+    function createArraySlice(array, start) {
+        var argumentsList = [];
+        if (start !== undefined) {
+            argumentsList.push(typeof start === "number" ? ts.createLiteral(start) : start);
+        }
+        return ts.createCall(ts.createPropertyAccess(array, "slice"), /*typeArguments*/ undefined, argumentsList);
+    }
+    ts.createArraySlice = createArraySlice;
+    function createArrayConcat(array, values) {
+        return ts.createCall(ts.createPropertyAccess(array, "concat"), 
+        /*typeArguments*/ undefined, values);
+    }
+    ts.createArrayConcat = createArrayConcat;
+    function createMathPow(left, right, location) {
+        return ts.setTextRange(ts.createCall(ts.createPropertyAccess(ts.createIdentifier("Math"), "pow"), 
+        /*typeArguments*/ undefined, [left, right]), location);
+    }
+    ts.createMathPow = createMathPow;
+    function createReactNamespace(reactNamespace, parent) {
+        // To ensure the emit resolver can properly resolve the namespace, we need to
+        // treat this identifier as if it were a source tree node by clearing the `Synthesized`
+        // flag and setting a parent node.
+        var react = ts.createIdentifier(reactNamespace || "React");
+        react.flags &= ~8 /* Synthesized */;
+        // Set the parent that is in parse tree
+        // this makes sure that parent chain is intact for checker to traverse complete scope tree
+        react.parent = ts.getParseTreeNode(parent);
+        return react;
+    }
+    function createJsxFactoryExpressionFromEntityName(jsxFactory, parent) {
+        if (ts.isQualifiedName(jsxFactory)) {
+            var left = createJsxFactoryExpressionFromEntityName(jsxFactory.left, parent);
+            var right = ts.createIdentifier(ts.idText(jsxFactory.right));
+            right.escapedText = jsxFactory.right.escapedText;
+            return ts.createPropertyAccess(left, right);
+        }
+        else {
+            return createReactNamespace(ts.idText(jsxFactory), parent);
+        }
+    }
+    function createJsxFactoryExpression(jsxFactoryEntity, reactNamespace, parent) {
+        return jsxFactoryEntity ?
+            createJsxFactoryExpressionFromEntityName(jsxFactoryEntity, parent) :
+            ts.createPropertyAccess(createReactNamespace(reactNamespace, parent), "createElement");
+    }
+    function createExpressionForJsxElement(jsxFactoryEntity, reactNamespace, tagName, props, children, parentElement, location) {
+        var argumentsList = [tagName];
+        if (props) {
+            argumentsList.push(props);
+        }
+        if (children && children.length > 0) {
+            if (!props) {
+                argumentsList.push(ts.createNull());
+            }
+            if (children.length > 1) {
+                for (var _i = 0, children_1 = children; _i < children_1.length; _i++) {
+                    var child = children_1[_i];
+                    startOnNewLine(child);
+                    argumentsList.push(child);
+                }
+            }
+            else {
+                argumentsList.push(children[0]);
+            }
+        }
+        return ts.setTextRange(ts.createCall(createJsxFactoryExpression(jsxFactoryEntity, reactNamespace, parentElement), 
+        /*typeArguments*/ undefined, argumentsList), location);
+    }
+    ts.createExpressionForJsxElement = createExpressionForJsxElement;
+    function createExpressionForJsxFragment(jsxFactoryEntity, reactNamespace, children, parentElement, location) {
+        var tagName = ts.createPropertyAccess(createReactNamespace(reactNamespace, parentElement), "Fragment");
+        var argumentsList = [tagName];
+        argumentsList.push(ts.createNull());
+        if (children && children.length > 0) {
+            if (children.length > 1) {
+                for (var _i = 0, children_2 = children; _i < children_2.length; _i++) {
+                    var child = children_2[_i];
+                    startOnNewLine(child);
+                    argumentsList.push(child);
+                }
+            }
+            else {
+                argumentsList.push(children[0]);
+            }
+        }
+        return ts.setTextRange(ts.createCall(createJsxFactoryExpression(jsxFactoryEntity, reactNamespace, parentElement), 
+        /*typeArguments*/ undefined, argumentsList), location);
+    }
+    ts.createExpressionForJsxFragment = createExpressionForJsxFragment;
+    // Helpers
+    function getHelperName(name) {
+        return ts.setEmitFlags(ts.createIdentifier(name), 4096 /* HelperName */ | 2 /* AdviseOnEmitNode */);
+    }
+    ts.getHelperName = getHelperName;
+    var valuesHelper = {
+        name: "typescript:values",
+        scoped: false,
+        text: "\n            var __values = (this && this.__values) || function (o) {\n                var m = typeof Symbol === \"function\" && o[Symbol.iterator], i = 0;\n                if (m) return m.call(o);\n                return {\n                    next: function () {\n                        if (o && i >= o.length) o = void 0;\n                        return { value: o && o[i++], done: !o };\n                    }\n                };\n            };"
+    };
+    function createValuesHelper(context, expression, location) {
+        context.requestEmitHelper(valuesHelper);
+        return ts.setTextRange(ts.createCall(getHelperName("__values"), 
+        /*typeArguments*/ undefined, [expression]), location);
+    }
+    ts.createValuesHelper = createValuesHelper;
+    var readHelper = {
+        name: "typescript:read",
+        scoped: false,
+        text: "\n            var __read = (this && this.__read) || function (o, n) {\n                var m = typeof Symbol === \"function\" && o[Symbol.iterator];\n                if (!m) return o;\n                var i = m.call(o), r, ar = [], e;\n                try {\n                    while ((n === void 0 || n-- > 0) && !(r = i.next()).done) ar.push(r.value);\n                }\n                catch (error) { e = { error: error }; }\n                finally {\n                    try {\n                        if (r && !r.done && (m = i[\"return\"])) m.call(i);\n                    }\n                    finally { if (e) throw e.error; }\n                }\n                return ar;\n            };"
+    };
+    function createReadHelper(context, iteratorRecord, count, location) {
+        context.requestEmitHelper(readHelper);
+        return ts.setTextRange(ts.createCall(getHelperName("__read"), 
+        /*typeArguments*/ undefined, count !== undefined
+            ? [iteratorRecord, ts.createLiteral(count)]
+            : [iteratorRecord]), location);
+    }
+    ts.createReadHelper = createReadHelper;
+    var spreadHelper = {
+        name: "typescript:spread",
+        scoped: false,
+        text: "\n            var __spread = (this && this.__spread) || function () {\n                for (var ar = [], i = 0; i < arguments.length; i++) ar = ar.concat(__read(arguments[i]));\n                return ar;\n            };"
+    };
+    function createSpreadHelper(context, argumentList, location) {
+        context.requestEmitHelper(readHelper);
+        context.requestEmitHelper(spreadHelper);
+        return ts.setTextRange(ts.createCall(getHelperName("__spread"), 
+        /*typeArguments*/ undefined, argumentList), location);
+    }
+    ts.createSpreadHelper = createSpreadHelper;
+    // Utilities
+    function createForOfBindingStatement(node, boundValue) {
+        if (ts.isVariableDeclarationList(node)) {
+            var firstDeclaration = ts.first(node.declarations);
+            var updatedDeclaration = ts.updateVariableDeclaration(firstDeclaration, firstDeclaration.name, 
+            /*typeNode*/ undefined, boundValue);
+            return ts.setTextRange(ts.createVariableStatement(
+            /*modifiers*/ undefined, ts.updateVariableDeclarationList(node, [updatedDeclaration])), 
+            /*location*/ node);
+        }
+        else {
+            var updatedExpression = ts.setTextRange(ts.createAssignment(node, boundValue), /*location*/ node);
+            return ts.setTextRange(ts.createStatement(updatedExpression), /*location*/ node);
+        }
+    }
+    ts.createForOfBindingStatement = createForOfBindingStatement;
+    function insertLeadingStatement(dest, source) {
+        if (ts.isBlock(dest)) {
+            return ts.updateBlock(dest, ts.setTextRange(ts.createNodeArray([source].concat(dest.statements)), dest.statements));
+        }
+        else {
+            return ts.createBlock(ts.createNodeArray([dest, source]), /*multiLine*/ true);
+        }
+    }
+    ts.insertLeadingStatement = insertLeadingStatement;
+    function restoreEnclosingLabel(node, outermostLabeledStatement, afterRestoreLabelCallback) {
+        if (!outermostLabeledStatement) {
+            return node;
+        }
+        var updated = ts.updateLabel(outermostLabeledStatement, outermostLabeledStatement.label, outermostLabeledStatement.statement.kind === 228 /* LabeledStatement */
+            ? restoreEnclosingLabel(node, outermostLabeledStatement.statement)
+            : node);
+        if (afterRestoreLabelCallback) {
+            afterRestoreLabelCallback(outermostLabeledStatement);
+        }
+        return updated;
+    }
+    ts.restoreEnclosingLabel = restoreEnclosingLabel;
+    function shouldBeCapturedInTempVariable(node, cacheIdentifiers) {
+        var target = ts.skipParentheses(node);
+        switch (target.kind) {
+            case 71 /* Identifier */:
+                return cacheIdentifiers;
+            case 99 /* ThisKeyword */:
+            case 8 /* NumericLiteral */:
+            case 9 /* StringLiteral */:
+                return false;
+            case 183 /* ArrayLiteralExpression */:
+                var elements = target.elements;
+                if (elements.length === 0) {
+                    return false;
+                }
+                return true;
+            case 184 /* ObjectLiteralExpression */:
+                return target.properties.length > 0;
+            default:
+                return true;
+        }
+    }
+    function createCallBinding(expression, recordTempVariable, languageVersion, cacheIdentifiers) {
+        if (cacheIdentifiers === void 0) { cacheIdentifiers = false; }
+        var callee = skipOuterExpressions(expression, 7 /* All */);
+        var thisArg;
+        var target;
+        if (ts.isSuperProperty(callee)) {
+            thisArg = ts.createThis();
+            target = callee;
+        }
+        else if (callee.kind === 97 /* SuperKeyword */) {
+            thisArg = ts.createThis();
+            target = languageVersion < 2 /* ES2015 */
+                ? ts.setTextRange(ts.createIdentifier("_super"), callee)
+                : callee;
+        }
+        else if (ts.getEmitFlags(callee) & 4096 /* HelperName */) {
+            thisArg = ts.createVoidZero();
+            target = parenthesizeForAccess(callee);
+        }
+        else {
+            switch (callee.kind) {
+                case 185 /* PropertyAccessExpression */: {
+                    if (shouldBeCapturedInTempVariable(callee.expression, cacheIdentifiers)) {
+                        // for `a.b()` target is `(_a = a).b` and thisArg is `_a`
+                        thisArg = ts.createTempVariable(recordTempVariable);
+                        target = ts.createPropertyAccess(ts.setTextRange(ts.createAssignment(thisArg, callee.expression), callee.expression), callee.name);
+                        ts.setTextRange(target, callee);
+                    }
+                    else {
+                        thisArg = callee.expression;
+                        target = callee;
+                    }
+                    break;
+                }
+                case 186 /* ElementAccessExpression */: {
+                    if (shouldBeCapturedInTempVariable(callee.expression, cacheIdentifiers)) {
+                        // for `a[b]()` target is `(_a = a)[b]` and thisArg is `_a`
+                        thisArg = ts.createTempVariable(recordTempVariable);
+                        target = ts.createElementAccess(ts.setTextRange(ts.createAssignment(thisArg, callee.expression), callee.expression), callee.argumentExpression);
+                        ts.setTextRange(target, callee);
+                    }
+                    else {
+                        thisArg = callee.expression;
+                        target = callee;
+                    }
+                    break;
+                }
+                default: {
+                    // for `a()` target is `a` and thisArg is `void 0`
+                    thisArg = ts.createVoidZero();
+                    target = parenthesizeForAccess(expression);
+                    break;
+                }
+            }
+        }
+        return { target: target, thisArg: thisArg };
+    }
+    ts.createCallBinding = createCallBinding;
+    function inlineExpressions(expressions) {
+        // Avoid deeply nested comma expressions as traversing them during emit can result in "Maximum call
+        // stack size exceeded" errors.
+        return expressions.length > 10
+            ? ts.createCommaList(expressions)
+            : ts.reduceLeft(expressions, ts.createComma);
+    }
+    ts.inlineExpressions = inlineExpressions;
+    function createExpressionFromEntityName(node) {
+        if (ts.isQualifiedName(node)) {
+            var left = createExpressionFromEntityName(node.left);
+            var right = ts.getMutableClone(node.right);
+            return ts.setTextRange(ts.createPropertyAccess(left, right), node);
+        }
+        else {
+            return ts.getMutableClone(node);
+        }
+    }
+    ts.createExpressionFromEntityName = createExpressionFromEntityName;
+    function createExpressionForPropertyName(memberName) {
+        if (ts.isIdentifier(memberName)) {
+            return ts.createLiteral(memberName);
+        }
+        else if (ts.isComputedPropertyName(memberName)) {
+            return ts.getMutableClone(memberName.expression);
+        }
+        else {
+            return ts.getMutableClone(memberName);
+        }
+    }
+    ts.createExpressionForPropertyName = createExpressionForPropertyName;
+    function createExpressionForObjectLiteralElementLike(node, property, receiver) {
+        switch (property.kind) {
+            case 156 /* GetAccessor */:
+            case 157 /* SetAccessor */:
+                return createExpressionForAccessorDeclaration(node.properties, property, receiver, !!node.multiLine);
+            case 270 /* PropertyAssignment */:
+                return createExpressionForPropertyAssignment(property, receiver);
+            case 271 /* ShorthandPropertyAssignment */:
+                return createExpressionForShorthandPropertyAssignment(property, receiver);
+            case 154 /* MethodDeclaration */:
+                return createExpressionForMethodDeclaration(property, receiver);
+        }
+    }
+    ts.createExpressionForObjectLiteralElementLike = createExpressionForObjectLiteralElementLike;
+    function createExpressionForAccessorDeclaration(properties, property, receiver, multiLine) {
+        var _a = ts.getAllAccessorDeclarations(properties, property), firstAccessor = _a.firstAccessor, getAccessor = _a.getAccessor, setAccessor = _a.setAccessor;
+        if (property === firstAccessor) {
+            var properties_9 = [];
+            if (getAccessor) {
+                var getterFunction = ts.createFunctionExpression(getAccessor.modifiers, 
+                /*asteriskToken*/ undefined, 
+                /*name*/ undefined, 
+                /*typeParameters*/ undefined, getAccessor.parameters, 
+                /*type*/ undefined, getAccessor.body // TODO: GH#18217
+                );
+                ts.setTextRange(getterFunction, getAccessor);
+                ts.setOriginalNode(getterFunction, getAccessor);
+                var getter = ts.createPropertyAssignment("get", getterFunction);
+                properties_9.push(getter);
+            }
+            if (setAccessor) {
+                var setterFunction = ts.createFunctionExpression(setAccessor.modifiers, 
+                /*asteriskToken*/ undefined, 
+                /*name*/ undefined, 
+                /*typeParameters*/ undefined, setAccessor.parameters, 
+                /*type*/ undefined, setAccessor.body // TODO: GH#18217
+                );
+                ts.setTextRange(setterFunction, setAccessor);
+                ts.setOriginalNode(setterFunction, setAccessor);
+                var setter = ts.createPropertyAssignment("set", setterFunction);
+                properties_9.push(setter);
+            }
+            properties_9.push(ts.createPropertyAssignment("enumerable", ts.createTrue()));
+            properties_9.push(ts.createPropertyAssignment("configurable", ts.createTrue()));
+            var expression = ts.setTextRange(ts.createCall(ts.createPropertyAccess(ts.createIdentifier("Object"), "defineProperty"), 
+            /*typeArguments*/ undefined, [
+                receiver,
+                createExpressionForPropertyName(property.name),
+                ts.createObjectLiteral(properties_9, multiLine)
+            ]), 
+            /*location*/ firstAccessor);
+            return ts.aggregateTransformFlags(expression);
+        }
+        return undefined;
+    }
+    function createExpressionForPropertyAssignment(property, receiver) {
+        return ts.aggregateTransformFlags(ts.setOriginalNode(ts.setTextRange(ts.createAssignment(createMemberAccessForPropertyName(receiver, property.name, /*location*/ property.name), property.initializer), property), property));
+    }
+    function createExpressionForShorthandPropertyAssignment(property, receiver) {
+        return ts.aggregateTransformFlags(ts.setOriginalNode(ts.setTextRange(ts.createAssignment(createMemberAccessForPropertyName(receiver, property.name, /*location*/ property.name), ts.getSynthesizedClone(property.name)), 
+        /*location*/ property), 
+        /*original*/ property));
+    }
+    function createExpressionForMethodDeclaration(method, receiver) {
+        return ts.aggregateTransformFlags(ts.setOriginalNode(ts.setTextRange(ts.createAssignment(createMemberAccessForPropertyName(receiver, method.name, /*location*/ method.name), ts.setOriginalNode(ts.setTextRange(ts.createFunctionExpression(method.modifiers, method.asteriskToken, 
+        /*name*/ undefined, 
+        /*typeParameters*/ undefined, method.parameters, 
+        /*type*/ undefined, method.body // TODO: GH#18217
+        ), 
+        /*location*/ method), 
+        /*original*/ method)), 
+        /*location*/ method), 
+        /*original*/ method));
+    }
+    /**
+     * Gets the internal name of a declaration. This is primarily used for declarations that can be
+     * referred to by name in the body of an ES5 class function body. An internal name will *never*
+     * be prefixed with an module or namespace export modifier like "exports." when emitted as an
+     * expression. An internal name will also *never* be renamed due to a collision with a block
+     * scoped variable.
+     *
+     * @param node The declaration.
+     * @param allowComments A value indicating whether comments may be emitted for the name.
+     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
+     */
+    function getInternalName(node, allowComments, allowSourceMaps) {
+        return getName(node, allowComments, allowSourceMaps, 16384 /* LocalName */ | 32768 /* InternalName */);
+    }
+    ts.getInternalName = getInternalName;
+    /**
+     * Gets whether an identifier should only be referred to by its internal name.
+     */
+    function isInternalName(node) {
+        return (ts.getEmitFlags(node) & 32768 /* InternalName */) !== 0;
+    }
+    ts.isInternalName = isInternalName;
+    /**
+     * Gets the local name of a declaration. This is primarily used for declarations that can be
+     * referred to by name in the declaration's immediate scope (classes, enums, namespaces). A
+     * local name will *never* be prefixed with an module or namespace export modifier like
+     * "exports." when emitted as an expression.
+     *
+     * @param node The declaration.
+     * @param allowComments A value indicating whether comments may be emitted for the name.
+     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
+     */
+    function getLocalName(node, allowComments, allowSourceMaps) {
+        return getName(node, allowComments, allowSourceMaps, 16384 /* LocalName */);
+    }
+    ts.getLocalName = getLocalName;
+    /**
+     * Gets whether an identifier should only be referred to by its local name.
+     */
+    function isLocalName(node) {
+        return (ts.getEmitFlags(node) & 16384 /* LocalName */) !== 0;
+    }
+    ts.isLocalName = isLocalName;
+    /**
+     * Gets the export name of a declaration. This is primarily used for declarations that can be
+     * referred to by name in the declaration's immediate scope (classes, enums, namespaces). An
+     * export name will *always* be prefixed with an module or namespace export modifier like
+     * `"exports."` when emitted as an expression if the name points to an exported symbol.
+     *
+     * @param node The declaration.
+     * @param allowComments A value indicating whether comments may be emitted for the name.
+     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
+     */
+    function getExportName(node, allowComments, allowSourceMaps) {
+        return getName(node, allowComments, allowSourceMaps, 8192 /* ExportName */);
+    }
+    ts.getExportName = getExportName;
+    /**
+     * Gets whether an identifier should only be referred to by its export representation if the
+     * name points to an exported symbol.
+     */
+    function isExportName(node) {
+        return (ts.getEmitFlags(node) & 8192 /* ExportName */) !== 0;
+    }
+    ts.isExportName = isExportName;
+    /**
+     * Gets the name of a declaration for use in declarations.
+     *
+     * @param node The declaration.
+     * @param allowComments A value indicating whether comments may be emitted for the name.
+     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
+     */
+    function getDeclarationName(node, allowComments, allowSourceMaps) {
+        return getName(node, allowComments, allowSourceMaps);
+    }
+    ts.getDeclarationName = getDeclarationName;
+    function getName(node, allowComments, allowSourceMaps, emitFlags) {
+        if (emitFlags === void 0) { emitFlags = 0; }
+        var nodeName = ts.getNameOfDeclaration(node);
+        if (nodeName && ts.isIdentifier(nodeName) && !ts.isGeneratedIdentifier(nodeName)) {
+            var name = ts.getMutableClone(nodeName);
+            emitFlags |= ts.getEmitFlags(nodeName);
+            if (!allowSourceMaps)
+                emitFlags |= 48 /* NoSourceMap */;
+            if (!allowComments)
+                emitFlags |= 1536 /* NoComments */;
+            if (emitFlags)
+                ts.setEmitFlags(name, emitFlags);
+            return name;
+        }
+        return ts.getGeneratedNameForNode(node);
+    }
+    /**
+     * Gets the exported name of a declaration for use in expressions.
+     *
+     * An exported name will *always* be prefixed with an module or namespace export modifier like
+     * "exports." if the name points to an exported symbol.
+     *
+     * @param ns The namespace identifier.
+     * @param node The declaration.
+     * @param allowComments A value indicating whether comments may be emitted for the name.
+     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
+     */
+    function getExternalModuleOrNamespaceExportName(ns, node, allowComments, allowSourceMaps) {
+        if (ns && ts.hasModifier(node, 1 /* Export */)) {
+            return getNamespaceMemberName(ns, getName(node), allowComments, allowSourceMaps);
+        }
+        return getExportName(node, allowComments, allowSourceMaps);
+    }
+    ts.getExternalModuleOrNamespaceExportName = getExternalModuleOrNamespaceExportName;
+    /**
+     * Gets a namespace-qualified name for use in expressions.
+     *
+     * @param ns The namespace identifier.
+     * @param name The name.
+     * @param allowComments A value indicating whether comments may be emitted for the name.
+     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
+     */
+    function getNamespaceMemberName(ns, name, allowComments, allowSourceMaps) {
+        var qualifiedName = ts.createPropertyAccess(ns, ts.nodeIsSynthesized(name) ? name : ts.getSynthesizedClone(name));
+        ts.setTextRange(qualifiedName, name);
+        var emitFlags = 0;
+        if (!allowSourceMaps)
+            emitFlags |= 48 /* NoSourceMap */;
+        if (!allowComments)
+            emitFlags |= 1536 /* NoComments */;
+        if (emitFlags)
+            ts.setEmitFlags(qualifiedName, emitFlags);
+        return qualifiedName;
+    }
+    ts.getNamespaceMemberName = getNamespaceMemberName;
+    function convertToFunctionBody(node, multiLine) {
+        return ts.isBlock(node) ? node : ts.setTextRange(ts.createBlock([ts.setTextRange(ts.createReturn(node), node)], multiLine), node);
+    }
+    ts.convertToFunctionBody = convertToFunctionBody;
+    function convertFunctionDeclarationToExpression(node) {
+        if (!node.body)
+            return ts.Debug.fail();
+        var updated = ts.createFunctionExpression(node.modifiers, node.asteriskToken, node.name, node.typeParameters, node.parameters, node.type, node.body);
+        ts.setOriginalNode(updated, node);
+        ts.setTextRange(updated, node);
+        if (ts.getStartsOnNewLine(node)) {
+            ts.setStartsOnNewLine(updated, /*newLine*/ true);
+        }
+        ts.aggregateTransformFlags(updated);
+        return updated;
+    }
+    ts.convertFunctionDeclarationToExpression = convertFunctionDeclarationToExpression;
+    function isUseStrictPrologue(node) {
+        return ts.isStringLiteral(node.expression) && node.expression.text === "use strict";
+    }
+    /**
+     * Add any necessary prologue-directives into target statement-array.
+     * The function needs to be called during each transformation step.
+     * This function needs to be called whenever we transform the statement
+     * list of a source file, namespace, or function-like body.
+     *
+     * @param target: result statements array
+     * @param source: origin statements array
+     * @param ensureUseStrict: boolean determining whether the function need to add prologue-directives
+     * @param visitor: Optional callback used to visit any custom prologue directives.
+     */
+    function addPrologue(target, source, ensureUseStrict, visitor) {
+        var offset = addStandardPrologue(target, source, ensureUseStrict);
+        return addCustomPrologue(target, source, offset, visitor);
+    }
+    ts.addPrologue = addPrologue;
+    /**
+     * Add just the standard (string-expression) prologue-directives into target statement-array.
+     * The function needs to be called during each transformation step.
+     * This function needs to be called whenever we transform the statement
+     * list of a source file, namespace, or function-like body.
+     */
+    function addStandardPrologue(target, source, ensureUseStrict) {
+        ts.Debug.assert(target.length === 0, "Prologue directives should be at the first statement in the target statements array");
+        var foundUseStrict = false;
+        var statementOffset = 0;
+        var numStatements = source.length;
+        while (statementOffset < numStatements) {
+            var statement = source[statementOffset];
+            if (ts.isPrologueDirective(statement)) {
+                if (isUseStrictPrologue(statement)) {
+                    foundUseStrict = true;
+                }
+                target.push(statement);
+            }
+            else {
+                break;
+            }
+            statementOffset++;
+        }
+        if (ensureUseStrict && !foundUseStrict) {
+            target.push(startOnNewLine(ts.createStatement(ts.createLiteral("use strict"))));
+        }
+        return statementOffset;
+    }
+    ts.addStandardPrologue = addStandardPrologue;
+    function addCustomPrologue(target, source, statementOffset, visitor) {
+        var numStatements = source.length;
+        while (statementOffset !== undefined && statementOffset < numStatements) {
+            var statement = source[statementOffset];
+            if (ts.getEmitFlags(statement) & 1048576 /* CustomPrologue */) {
+                ts.append(target, visitor ? ts.visitNode(statement, visitor, ts.isStatement) : statement);
+            }
+            else {
+                break;
+            }
+            statementOffset++;
+        }
+        return statementOffset;
+    }
+    ts.addCustomPrologue = addCustomPrologue;
+    function startsWithUseStrict(statements) {
+        var firstStatement = ts.firstOrUndefined(statements);
+        return firstStatement !== undefined
+            && ts.isPrologueDirective(firstStatement)
+            && isUseStrictPrologue(firstStatement);
+    }
+    ts.startsWithUseStrict = startsWithUseStrict;
+    /**
+     * Ensures "use strict" directive is added
+     *
+     * @param statements An array of statements
+     */
+    function ensureUseStrict(statements) {
+        var foundUseStrict = false;
+        for (var _i = 0, statements_3 = statements; _i < statements_3.length; _i++) {
+            var statement = statements_3[_i];
+            if (ts.isPrologueDirective(statement)) {
+                if (isUseStrictPrologue(statement)) {
+                    foundUseStrict = true;
+                    break;
+                }
+            }
+            else {
+                break;
+            }
+        }
+        if (!foundUseStrict) {
+            return ts.setTextRange(ts.createNodeArray([
+                startOnNewLine(ts.createStatement(ts.createLiteral("use strict")))
+            ].concat(statements)), statements);
+        }
+        return statements;
+    }
+    ts.ensureUseStrict = ensureUseStrict;
+    /**
+     * Wraps the operand to a BinaryExpression in parentheses if they are needed to preserve the intended
+     * order of operations.
+     *
+     * @param binaryOperator The operator for the BinaryExpression.
+     * @param operand The operand for the BinaryExpression.
+     * @param isLeftSideOfBinary A value indicating whether the operand is the left side of the
+     *                           BinaryExpression.
+     */
+    function parenthesizeBinaryOperand(binaryOperator, operand, isLeftSideOfBinary, leftOperand) {
+        var skipped = ts.skipPartiallyEmittedExpressions(operand);
+        // If the resulting expression is already parenthesized, we do not need to do any further processing.
+        if (skipped.kind === 191 /* ParenthesizedExpression */) {
+            return operand;
+        }
+        return binaryOperandNeedsParentheses(binaryOperator, operand, isLeftSideOfBinary, leftOperand)
+            ? ts.createParen(operand)
+            : operand;
+    }
+    ts.parenthesizeBinaryOperand = parenthesizeBinaryOperand;
+    /**
+     * Determines whether the operand to a BinaryExpression needs to be parenthesized.
+     *
+     * @param binaryOperator The operator for the BinaryExpression.
+     * @param operand The operand for the BinaryExpression.
+     * @param isLeftSideOfBinary A value indicating whether the operand is the left side of the
+     *                           BinaryExpression.
+     */
+    function binaryOperandNeedsParentheses(binaryOperator, operand, isLeftSideOfBinary, leftOperand) {
+        // If the operand has lower precedence, then it needs to be parenthesized to preserve the
+        // intent of the expression. For example, if the operand is `a + b` and the operator is
+        // `*`, then we need to parenthesize the operand to preserve the intended order of
+        // operations: `(a + b) * x`.
+        //
+        // If the operand has higher precedence, then it does not need to be parenthesized. For
+        // example, if the operand is `a * b` and the operator is `+`, then we do not need to
+        // parenthesize to preserve the intended order of operations: `a * b + x`.
+        //
+        // If the operand has the same precedence, then we need to check the associativity of
+        // the operator based on whether this is the left or right operand of the expression.
+        //
+        // For example, if `a / d` is on the right of operator `*`, we need to parenthesize
+        // to preserve the intended order of operations: `x * (a / d)`
+        //
+        // If `a ** d` is on the left of operator `**`, we need to parenthesize to preserve
+        // the intended order of operations: `(a ** b) ** c`
+        var binaryOperatorPrecedence = ts.getOperatorPrecedence(200 /* BinaryExpression */, binaryOperator);
+        var binaryOperatorAssociativity = ts.getOperatorAssociativity(200 /* BinaryExpression */, binaryOperator);
+        var emittedOperand = ts.skipPartiallyEmittedExpressions(operand);
+        var operandPrecedence = ts.getExpressionPrecedence(emittedOperand);
+        switch (ts.compareValues(operandPrecedence, binaryOperatorPrecedence)) {
+            case -1 /* LessThan */:
+                // If the operand is the right side of a right-associative binary operation
+                // and is a yield expression, then we do not need parentheses.
+                if (!isLeftSideOfBinary
+                    && binaryOperatorAssociativity === 1 /* Right */
+                    && operand.kind === 203 /* YieldExpression */) {
+                    return false;
+                }
+                return true;
+            case 1 /* GreaterThan */:
+                return false;
+            case 0 /* EqualTo */:
+                if (isLeftSideOfBinary) {
+                    // No need to parenthesize the left operand when the binary operator is
+                    // left associative:
+                    //  (a*b)/x    -> a*b/x
+                    //  (a**b)/x   -> a**b/x
+                    //
+                    // Parentheses are needed for the left operand when the binary operator is
+                    // right associative:
+                    //  (a/b)**x   -> (a/b)**x
+                    //  (a**b)**x  -> (a**b)**x
+                    return binaryOperatorAssociativity === 1 /* Right */;
+                }
+                else {
+                    if (ts.isBinaryExpression(emittedOperand)
+                        && emittedOperand.operatorToken.kind === binaryOperator) {
+                        // No need to parenthesize the right operand when the binary operator and
+                        // operand are the same and one of the following:
+                        //  x*(a*b)     => x*a*b
+                        //  x|(a|b)     => x|a|b
+                        //  x&(a&b)     => x&a&b
+                        //  x^(a^b)     => x^a^b
+                        if (operatorHasAssociativeProperty(binaryOperator)) {
+                            return false;
+                        }
+                        // No need to parenthesize the right operand when the binary operator
+                        // is plus (+) if both the left and right operands consist solely of either
+                        // literals of the same kind or binary plus (+) expressions for literals of
+                        // the same kind (recursively).
+                        //  "a"+(1+2)       => "a"+(1+2)
+                        //  "a"+("b"+"c")   => "a"+"b"+"c"
+                        if (binaryOperator === 37 /* PlusToken */) {
+                            var leftKind = leftOperand ? getLiteralKindOfBinaryPlusOperand(leftOperand) : 0 /* Unknown */;
+                            if (ts.isLiteralKind(leftKind) && leftKind === getLiteralKindOfBinaryPlusOperand(emittedOperand)) {
+                                return false;
+                            }
+                        }
+                    }
+                    // No need to parenthesize the right operand when the operand is right
+                    // associative:
+                    //  x/(a**b)    -> x/a**b
+                    //  x**(a**b)   -> x**a**b
+                    //
+                    // Parentheses are needed for the right operand when the operand is left
+                    // associative:
+                    //  x/(a*b)     -> x/(a*b)
+                    //  x**(a/b)    -> x**(a/b)
+                    var operandAssociativity = ts.getExpressionAssociativity(emittedOperand);
+                    return operandAssociativity === 0 /* Left */;
+                }
+        }
+    }
+    /**
+     * Determines whether a binary operator is mathematically associative.
+     *
+     * @param binaryOperator The binary operator.
+     */
+    function operatorHasAssociativeProperty(binaryOperator) {
+        // The following operators are associative in JavaScript:
+        //  (a*b)*c     -> a*(b*c)  -> a*b*c
+        //  (a|b)|c     -> a|(b|c)  -> a|b|c
+        //  (a&b)&c     -> a&(b&c)  -> a&b&c
+        //  (a^b)^c     -> a^(b^c)  -> a^b^c
+        //
+        // While addition is associative in mathematics, JavaScript's `+` is not
+        // guaranteed to be associative as it is overloaded with string concatenation.
+        return binaryOperator === 39 /* AsteriskToken */
+            || binaryOperator === 49 /* BarToken */
+            || binaryOperator === 48 /* AmpersandToken */
+            || binaryOperator === 50 /* CaretToken */;
+    }
+    /**
+     * This function determines whether an expression consists of a homogeneous set of
+     * literal expressions or binary plus expressions that all share the same literal kind.
+     * It is used to determine whether the right-hand operand of a binary plus expression can be
+     * emitted without parentheses.
+     */
+    function getLiteralKindOfBinaryPlusOperand(node) {
+        node = ts.skipPartiallyEmittedExpressions(node);
+        if (ts.isLiteralKind(node.kind)) {
+            return node.kind;
+        }
+        if (node.kind === 200 /* BinaryExpression */ && node.operatorToken.kind === 37 /* PlusToken */) {
+            if (node.cachedLiteralKind !== undefined) {
+                return node.cachedLiteralKind;
+            }
+            var leftKind = getLiteralKindOfBinaryPlusOperand(node.left);
+            var literalKind = ts.isLiteralKind(leftKind)
+                && leftKind === getLiteralKindOfBinaryPlusOperand(node.right)
+                ? leftKind
+                : 0 /* Unknown */;
+            node.cachedLiteralKind = literalKind;
+            return literalKind;
+        }
+        return 0 /* Unknown */;
+    }
+    function parenthesizeForConditionalHead(condition) {
+        var conditionalPrecedence = ts.getOperatorPrecedence(201 /* ConditionalExpression */, 55 /* QuestionToken */);
+        var emittedCondition = ts.skipPartiallyEmittedExpressions(condition);
+        var conditionPrecedence = ts.getExpressionPrecedence(emittedCondition);
+        if (ts.compareValues(conditionPrecedence, conditionalPrecedence) === -1 /* LessThan */) {
+            return ts.createParen(condition);
+        }
+        return condition;
+    }
+    ts.parenthesizeForConditionalHead = parenthesizeForConditionalHead;
+    function parenthesizeSubexpressionOfConditionalExpression(e) {
+        // per ES grammar both 'whenTrue' and 'whenFalse' parts of conditional expression are assignment expressions
+        // so in case when comma expression is introduced as a part of previous transformations
+        // if should be wrapped in parens since comma operator has the lowest precedence
+        var emittedExpression = ts.skipPartiallyEmittedExpressions(e);
+        return emittedExpression.kind === 200 /* BinaryExpression */ && emittedExpression.operatorToken.kind === 26 /* CommaToken */ ||
+            emittedExpression.kind === 302 /* CommaListExpression */
+            ? ts.createParen(e)
+            : e;
+    }
+    ts.parenthesizeSubexpressionOfConditionalExpression = parenthesizeSubexpressionOfConditionalExpression;
+    /**
+     *  [Per the spec](https://tc39.github.io/ecma262/#prod-ExportDeclaration), `export default` accepts _AssigmentExpression_ but
+     *  has a lookahead restriction for `function`, `async function`, and `class`.
+     *
+     * Basically, that means we need to parenthesize in the following cases:
+     *
+     * - BinaryExpression of CommaToken
+     * - CommaList (synthetic list of multiple comma expressions)
+     * - FunctionExpression
+     * - ClassExpression
+     */
+    function parenthesizeDefaultExpression(e) {
+        var check = ts.skipPartiallyEmittedExpressions(e);
+        return (check.kind === 205 /* ClassExpression */ ||
+            check.kind === 192 /* FunctionExpression */ ||
+            check.kind === 302 /* CommaListExpression */ ||
+            ts.isBinaryExpression(check) && check.operatorToken.kind === 26 /* CommaToken */)
+            ? ts.createParen(e)
+            : e;
+    }
+    ts.parenthesizeDefaultExpression = parenthesizeDefaultExpression;
+    /**
+     * Wraps an expression in parentheses if it is needed in order to use the expression
+     * as the expression of a NewExpression node.
+     *
+     * @param expression The Expression node.
+     */
+    function parenthesizeForNew(expression) {
+        var leftmostExpr = getLeftmostExpression(expression, /*stopAtCallExpressions*/ true);
+        switch (leftmostExpr.kind) {
+            case 187 /* CallExpression */:
+                return ts.createParen(expression);
+            case 188 /* NewExpression */:
+                return !leftmostExpr.arguments
+                    ? ts.createParen(expression)
+                    : expression;
+        }
+        return parenthesizeForAccess(expression);
+    }
+    ts.parenthesizeForNew = parenthesizeForNew;
+    /**
+     * Wraps an expression in parentheses if it is needed in order to use the expression for
+     * property or element access.
+     *
+     * @param expr The expression node.
+     */
+    function parenthesizeForAccess(expression) {
+        // isLeftHandSideExpression is almost the correct criterion for when it is not necessary
+        // to parenthesize the expression before a dot. The known exception is:
+        //
+        //    NewExpression:
+        //       new C.x        -> not the same as (new C).x
+        //
+        var emittedExpression = ts.skipPartiallyEmittedExpressions(expression);
+        if (ts.isLeftHandSideExpression(emittedExpression)
+            && (emittedExpression.kind !== 188 /* NewExpression */ || emittedExpression.arguments)) {
+            return expression;
+        }
+        return ts.setTextRange(ts.createParen(expression), expression);
+    }
+    ts.parenthesizeForAccess = parenthesizeForAccess;
+    function parenthesizePostfixOperand(operand) {
+        return ts.isLeftHandSideExpression(operand)
+            ? operand
+            : ts.setTextRange(ts.createParen(operand), operand);
+    }
+    ts.parenthesizePostfixOperand = parenthesizePostfixOperand;
+    function parenthesizePrefixOperand(operand) {
+        return ts.isUnaryExpression(operand)
+            ? operand
+            : ts.setTextRange(ts.createParen(operand), operand);
+    }
+    ts.parenthesizePrefixOperand = parenthesizePrefixOperand;
+    function parenthesizeListElements(elements) {
+        var result;
+        for (var i = 0; i < elements.length; i++) {
+            var element = parenthesizeExpressionForList(elements[i]);
+            if (result !== undefined || element !== elements[i]) {
+                if (result === undefined) {
+                    result = elements.slice(0, i);
+                }
+                result.push(element);
+            }
+        }
+        if (result !== undefined) {
+            return ts.setTextRange(ts.createNodeArray(result, elements.hasTrailingComma), elements);
+        }
+        return elements;
+    }
+    ts.parenthesizeListElements = parenthesizeListElements;
+    function parenthesizeExpressionForList(expression) {
+        var emittedExpression = ts.skipPartiallyEmittedExpressions(expression);
+        var expressionPrecedence = ts.getExpressionPrecedence(emittedExpression);
+        var commaPrecedence = ts.getOperatorPrecedence(200 /* BinaryExpression */, 26 /* CommaToken */);
+        return expressionPrecedence > commaPrecedence
+            ? expression
+            : ts.setTextRange(ts.createParen(expression), expression);
+    }
+    ts.parenthesizeExpressionForList = parenthesizeExpressionForList;
+    function parenthesizeExpressionForExpressionStatement(expression) {
+        var emittedExpression = ts.skipPartiallyEmittedExpressions(expression);
+        if (ts.isCallExpression(emittedExpression)) {
+            var callee = emittedExpression.expression;
+            var kind = ts.skipPartiallyEmittedExpressions(callee).kind;
+            if (kind === 192 /* FunctionExpression */ || kind === 193 /* ArrowFunction */) {
+                var mutableCall = ts.getMutableClone(emittedExpression);
+                mutableCall.expression = ts.setTextRange(ts.createParen(callee), callee);
+                return recreateOuterExpressions(expression, mutableCall, 4 /* PartiallyEmittedExpressions */);
+            }
+        }
+        var leftmostExpressionKind = getLeftmostExpression(emittedExpression, /*stopAtCallExpressions*/ false).kind;
+        if (leftmostExpressionKind === 184 /* ObjectLiteralExpression */ || leftmostExpressionKind === 192 /* FunctionExpression */) {
+            return ts.setTextRange(ts.createParen(expression), expression);
+        }
+        return expression;
+    }
+    ts.parenthesizeExpressionForExpressionStatement = parenthesizeExpressionForExpressionStatement;
+    function parenthesizeConditionalTypeMember(member) {
+        return member.kind === 171 /* ConditionalType */ ? ts.createParenthesizedType(member) : member;
+    }
+    ts.parenthesizeConditionalTypeMember = parenthesizeConditionalTypeMember;
+    function parenthesizeElementTypeMember(member) {
+        switch (member.kind) {
+            case 169 /* UnionType */:
+            case 170 /* IntersectionType */:
+            case 163 /* FunctionType */:
+            case 164 /* ConstructorType */:
+                return ts.createParenthesizedType(member);
+        }
+        return parenthesizeConditionalTypeMember(member);
+    }
+    ts.parenthesizeElementTypeMember = parenthesizeElementTypeMember;
+    function parenthesizeArrayTypeMember(member) {
+        switch (member.kind) {
+            case 165 /* TypeQuery */:
+            case 175 /* TypeOperator */:
+            case 172 /* InferType */:
+                return ts.createParenthesizedType(member);
+        }
+        return parenthesizeElementTypeMember(member);
+    }
+    ts.parenthesizeArrayTypeMember = parenthesizeArrayTypeMember;
+    function parenthesizeElementTypeMembers(members) {
+        return ts.createNodeArray(ts.sameMap(members, parenthesizeElementTypeMember));
+    }
+    ts.parenthesizeElementTypeMembers = parenthesizeElementTypeMembers;
+    function parenthesizeTypeParameters(typeParameters) {
+        if (ts.some(typeParameters)) {
+            var params = [];
+            for (var i = 0; i < typeParameters.length; ++i) {
+                var entry = typeParameters[i];
+                params.push(i === 0 && ts.isFunctionOrConstructorTypeNode(entry) && entry.typeParameters ?
+                    ts.createParenthesizedType(entry) :
+                    entry);
+            }
+            return ts.createNodeArray(params);
+        }
+    }
+    ts.parenthesizeTypeParameters = parenthesizeTypeParameters;
+    function getLeftmostExpression(node, stopAtCallExpressions) {
+        while (true) {
+            switch (node.kind) {
+                case 199 /* PostfixUnaryExpression */:
+                    node = node.operand;
+                    continue;
+                case 200 /* BinaryExpression */:
+                    node = node.left;
+                    continue;
+                case 201 /* ConditionalExpression */:
+                    node = node.condition;
+                    continue;
+                case 187 /* CallExpression */:
+                    if (stopAtCallExpressions) {
+                        return node;
+                    }
+                // falls through
+                case 186 /* ElementAccessExpression */:
+                case 185 /* PropertyAccessExpression */:
+                    node = node.expression;
+                    continue;
+                case 301 /* PartiallyEmittedExpression */:
+                    node = node.expression;
+                    continue;
+            }
+            return node;
+        }
+    }
+    function parenthesizeConciseBody(body) {
+        if (!ts.isBlock(body) && getLeftmostExpression(body, /*stopAtCallExpressions*/ false).kind === 184 /* ObjectLiteralExpression */) {
+            return ts.setTextRange(ts.createParen(body), body);
+        }
+        return body;
+    }
+    ts.parenthesizeConciseBody = parenthesizeConciseBody;
+    var OuterExpressionKinds;
+    (function (OuterExpressionKinds) {
+        OuterExpressionKinds[OuterExpressionKinds["Parentheses"] = 1] = "Parentheses";
+        OuterExpressionKinds[OuterExpressionKinds["Assertions"] = 2] = "Assertions";
+        OuterExpressionKinds[OuterExpressionKinds["PartiallyEmittedExpressions"] = 4] = "PartiallyEmittedExpressions";
+        OuterExpressionKinds[OuterExpressionKinds["All"] = 7] = "All";
+    })(OuterExpressionKinds = ts.OuterExpressionKinds || (ts.OuterExpressionKinds = {}));
+    function isOuterExpression(node, kinds) {
+        if (kinds === void 0) { kinds = 7 /* All */; }
+        switch (node.kind) {
+            case 191 /* ParenthesizedExpression */:
+                return (kinds & 1 /* Parentheses */) !== 0;
+            case 190 /* TypeAssertionExpression */:
+            case 208 /* AsExpression */:
+            case 209 /* NonNullExpression */:
+                return (kinds & 2 /* Assertions */) !== 0;
+            case 301 /* PartiallyEmittedExpression */:
+                return (kinds & 4 /* PartiallyEmittedExpressions */) !== 0;
+        }
+        return false;
+    }
+    ts.isOuterExpression = isOuterExpression;
+    function skipOuterExpressions(node, kinds) {
+        if (kinds === void 0) { kinds = 7 /* All */; }
+        var previousNode;
+        do {
+            previousNode = node;
+            if (kinds & 1 /* Parentheses */) {
+                node = ts.skipParentheses(node);
+            }
+            if (kinds & 2 /* Assertions */) {
+                node = skipAssertions(node);
+            }
+            if (kinds & 4 /* PartiallyEmittedExpressions */) {
+                node = ts.skipPartiallyEmittedExpressions(node);
+            }
+        } while (previousNode !== node);
+        return node;
+    }
+    ts.skipOuterExpressions = skipOuterExpressions;
+    function skipAssertions(node) {
+        while (ts.isAssertionExpression(node) || node.kind === 209 /* NonNullExpression */) {
+            node = node.expression;
+        }
+        return node;
+    }
+    ts.skipAssertions = skipAssertions;
+    function updateOuterExpression(outerExpression, expression) {
+        switch (outerExpression.kind) {
+            case 191 /* ParenthesizedExpression */: return ts.updateParen(outerExpression, expression);
+            case 190 /* TypeAssertionExpression */: return ts.updateTypeAssertion(outerExpression, outerExpression.type, expression);
+            case 208 /* AsExpression */: return ts.updateAsExpression(outerExpression, expression, outerExpression.type);
+            case 209 /* NonNullExpression */: return ts.updateNonNullExpression(outerExpression, expression);
+            case 301 /* PartiallyEmittedExpression */: return ts.updatePartiallyEmittedExpression(outerExpression, expression);
+        }
+    }
+    /**
+     * Determines whether a node is a parenthesized expression that can be ignored when recreating outer expressions.
+     *
+     * A parenthesized expression can be ignored when all of the following are true:
+     *
+     * - It's `pos` and `end` are not -1
+     * - It does not have a custom source map range
+     * - It does not have a custom comment range
+     * - It does not have synthetic leading or trailing comments
+     *
+     * If an outermost parenthesized expression is ignored, but the containing expression requires a parentheses around
+     * the expression to maintain precedence, a new parenthesized expression should be created automatically when
+     * the containing expression is created/updated.
+     */
+    function isIgnorableParen(node) {
+        return node.kind === 191 /* ParenthesizedExpression */
+            && ts.nodeIsSynthesized(node)
+            && ts.nodeIsSynthesized(ts.getSourceMapRange(node))
+            && ts.nodeIsSynthesized(ts.getCommentRange(node))
+            && !ts.some(ts.getSyntheticLeadingComments(node))
+            && !ts.some(ts.getSyntheticTrailingComments(node));
+    }
+    function recreateOuterExpressions(outerExpression, innerExpression, kinds) {
+        if (kinds === void 0) { kinds = 7 /* All */; }
+        if (outerExpression && isOuterExpression(outerExpression, kinds) && !isIgnorableParen(outerExpression)) {
+            return updateOuterExpression(outerExpression, recreateOuterExpressions(outerExpression.expression, innerExpression));
+        }
+        return innerExpression;
+    }
+    ts.recreateOuterExpressions = recreateOuterExpressions;
+    function startOnNewLine(node) {
+        return ts.setStartsOnNewLine(node, /*newLine*/ true);
+    }
+    ts.startOnNewLine = startOnNewLine;
+    function getExternalHelpersModuleName(node) {
+        var parseNode = ts.getOriginalNode(node, ts.isSourceFile);
+        var emitNode = parseNode && parseNode.emitNode;
+        return emitNode && emitNode.externalHelpersModuleName;
+    }
+    ts.getExternalHelpersModuleName = getExternalHelpersModuleName;
+    function getOrCreateExternalHelpersModuleNameIfNeeded(node, compilerOptions, hasExportStarsToExportValues, hasImportStarOrImportDefault) {
+        if (compilerOptions.importHelpers && ts.isEffectiveExternalModule(node, compilerOptions)) {
+            var externalHelpersModuleName = getExternalHelpersModuleName(node);
+            if (externalHelpersModuleName) {
+                return externalHelpersModuleName;
+            }
+            var moduleKind = ts.getEmitModuleKind(compilerOptions);
+            var create = (hasExportStarsToExportValues || (compilerOptions.esModuleInterop && hasImportStarOrImportDefault))
+                && moduleKind !== ts.ModuleKind.System
+                && moduleKind !== ts.ModuleKind.ES2015
+                && moduleKind !== ts.ModuleKind.ESNext;
+            if (!create) {
+                var helpers = ts.getEmitHelpers(node);
+                if (helpers) {
+                    for (var _i = 0, helpers_2 = helpers; _i < helpers_2.length; _i++) {
+                        var helper = helpers_2[_i];
+                        if (!helper.scoped) {
+                            create = true;
+                            break;
+                        }
+                    }
+                }
+            }
+            if (create) {
+                var parseNode = ts.getOriginalNode(node, ts.isSourceFile);
+                var emitNode = ts.getOrCreateEmitNode(parseNode);
+                return emitNode.externalHelpersModuleName || (emitNode.externalHelpersModuleName = ts.createUniqueName(ts.externalHelpersModuleNameText));
+            }
+        }
+    }
+    ts.getOrCreateExternalHelpersModuleNameIfNeeded = getOrCreateExternalHelpersModuleNameIfNeeded;
+    /**
+     * Get the name of that target module from an import or export declaration
+     */
+    function getLocalNameForExternalImport(node, sourceFile) {
+        var namespaceDeclaration = ts.getNamespaceDeclarationNode(node);
+        if (namespaceDeclaration && !ts.isDefaultImport(node)) {
+            var name = namespaceDeclaration.name;
+            return ts.isGeneratedIdentifier(name) ? name : ts.createIdentifier(ts.getSourceTextOfNodeFromSourceFile(sourceFile, name) || ts.idText(name));
+        }
+        if (node.kind === 244 /* ImportDeclaration */ && node.importClause) {
+            return ts.getGeneratedNameForNode(node);
+        }
+        if (node.kind === 250 /* ExportDeclaration */ && node.moduleSpecifier) {
+            return ts.getGeneratedNameForNode(node);
+        }
+        return undefined;
+    }
+    ts.getLocalNameForExternalImport = getLocalNameForExternalImport;
+    /**
+     * Get the name of a target module from an import/export declaration as should be written in the emitted output.
+     * The emitted output name can be different from the input if:
+     *  1. The module has a /// <amd-module name="<new name>" />
+     *  2. --out or --outFile is used, making the name relative to the rootDir
+     *  3- The containing SourceFile has an entry in renamedDependencies for the import as requested by some module loaders (e.g. System).
+     * Otherwise, a new StringLiteral node representing the module name will be returned.
+     */
+    function getExternalModuleNameLiteral(importNode, sourceFile, host, resolver, compilerOptions) {
+        var moduleName = ts.getExternalModuleName(importNode); // TODO: GH#18217
+        if (moduleName.kind === 9 /* StringLiteral */) {
+            return tryGetModuleNameFromDeclaration(importNode, host, resolver, compilerOptions)
+                || tryRenameExternalModule(moduleName, sourceFile)
+                || ts.getSynthesizedClone(moduleName);
+        }
+        return undefined;
+    }
+    ts.getExternalModuleNameLiteral = getExternalModuleNameLiteral;
+    /**
+     * Some bundlers (SystemJS builder) sometimes want to rename dependencies.
+     * Here we check if alternative name was provided for a given moduleName and return it if possible.
+     */
+    function tryRenameExternalModule(moduleName, sourceFile) {
+        var rename = sourceFile.renamedDependencies && sourceFile.renamedDependencies.get(moduleName.text);
+        return rename && ts.createLiteral(rename);
+    }
+    /**
+     * Get the name of a module as should be written in the emitted output.
+     * The emitted output name can be different from the input if:
+     *  1. The module has a /// <amd-module name="<new name>" />
+     *  2. --out or --outFile is used, making the name relative to the rootDir
+     * Otherwise, a new StringLiteral node representing the module name will be returned.
+     */
+    function tryGetModuleNameFromFile(file, host, options) {
+        if (!file) {
+            return undefined;
+        }
+        if (file.moduleName) {
+            return ts.createLiteral(file.moduleName);
+        }
+        if (!file.isDeclarationFile && (options.out || options.outFile)) {
+            return ts.createLiteral(ts.getExternalModuleNameFromPath(host, file.fileName));
+        }
+        return undefined;
+    }
+    ts.tryGetModuleNameFromFile = tryGetModuleNameFromFile;
+    function tryGetModuleNameFromDeclaration(declaration, host, resolver, compilerOptions) {
+        return tryGetModuleNameFromFile(resolver.getExternalModuleFileFromDeclaration(declaration), host, compilerOptions);
+    }
+    /**
+     * Gets the initializer of an BindingOrAssignmentElement.
+     */
+    function getInitializerOfBindingOrAssignmentElement(bindingElement) {
+        if (ts.isDeclarationBindingElement(bindingElement)) {
+            // `1` in `let { a = 1 } = ...`
+            // `1` in `let { a: b = 1 } = ...`
+            // `1` in `let { a: {b} = 1 } = ...`
+            // `1` in `let { a: [b] = 1 } = ...`
+            // `1` in `let [a = 1] = ...`
+            // `1` in `let [{a} = 1] = ...`
+            // `1` in `let [[a] = 1] = ...`
+            return bindingElement.initializer;
+        }
+        if (ts.isPropertyAssignment(bindingElement)) {
+            // `1` in `({ a: b = 1 } = ...)`
+            // `1` in `({ a: {b} = 1 } = ...)`
+            // `1` in `({ a: [b] = 1 } = ...)`
+            var initializer = bindingElement.initializer;
+            return ts.isAssignmentExpression(initializer, /*excludeCompoundAssignment*/ true)
+                ? initializer.right
+                : undefined;
+        }
+        if (ts.isShorthandPropertyAssignment(bindingElement)) {
+            // `1` in `({ a = 1 } = ...)`
+            return bindingElement.objectAssignmentInitializer;
+        }
+        if (ts.isAssignmentExpression(bindingElement, /*excludeCompoundAssignment*/ true)) {
+            // `1` in `[a = 1] = ...`
+            // `1` in `[{a} = 1] = ...`
+            // `1` in `[[a] = 1] = ...`
+            return bindingElement.right;
+        }
+        if (ts.isSpreadElement(bindingElement)) {
+            // Recovery consistent with existing emit.
+            return getInitializerOfBindingOrAssignmentElement(bindingElement.expression);
+        }
+    }
+    ts.getInitializerOfBindingOrAssignmentElement = getInitializerOfBindingOrAssignmentElement;
+    /**
+     * Gets the name of an BindingOrAssignmentElement.
+     */
+    function getTargetOfBindingOrAssignmentElement(bindingElement) {
+        if (ts.isDeclarationBindingElement(bindingElement)) {
+            // `a` in `let { a } = ...`
+            // `a` in `let { a = 1 } = ...`
+            // `b` in `let { a: b } = ...`
+            // `b` in `let { a: b = 1 } = ...`
+            // `a` in `let { ...a } = ...`
+            // `{b}` in `let { a: {b} } = ...`
+            // `{b}` in `let { a: {b} = 1 } = ...`
+            // `[b]` in `let { a: [b] } = ...`
+            // `[b]` in `let { a: [b] = 1 } = ...`
+            // `a` in `let [a] = ...`
+            // `a` in `let [a = 1] = ...`
+            // `a` in `let [...a] = ...`
+            // `{a}` in `let [{a}] = ...`
+            // `{a}` in `let [{a} = 1] = ...`
+            // `[a]` in `let [[a]] = ...`
+            // `[a]` in `let [[a] = 1] = ...`
+            return bindingElement.name;
+        }
+        if (ts.isObjectLiteralElementLike(bindingElement)) {
+            switch (bindingElement.kind) {
+                case 270 /* PropertyAssignment */:
+                    // `b` in `({ a: b } = ...)`
+                    // `b` in `({ a: b = 1 } = ...)`
+                    // `{b}` in `({ a: {b} } = ...)`
+                    // `{b}` in `({ a: {b} = 1 } = ...)`
+                    // `[b]` in `({ a: [b] } = ...)`
+                    // `[b]` in `({ a: [b] = 1 } = ...)`
+                    // `b.c` in `({ a: b.c } = ...)`
+                    // `b.c` in `({ a: b.c = 1 } = ...)`
+                    // `b[0]` in `({ a: b[0] } = ...)`
+                    // `b[0]` in `({ a: b[0] = 1 } = ...)`
+                    return getTargetOfBindingOrAssignmentElement(bindingElement.initializer);
+                case 271 /* ShorthandPropertyAssignment */:
+                    // `a` in `({ a } = ...)`
+                    // `a` in `({ a = 1 } = ...)`
+                    return bindingElement.name;
+                case 272 /* SpreadAssignment */:
+                    // `a` in `({ ...a } = ...)`
+                    return getTargetOfBindingOrAssignmentElement(bindingElement.expression);
+            }
+            // no target
+            return undefined;
+        }
+        if (ts.isAssignmentExpression(bindingElement, /*excludeCompoundAssignment*/ true)) {
+            // `a` in `[a = 1] = ...`
+            // `{a}` in `[{a} = 1] = ...`
+            // `[a]` in `[[a] = 1] = ...`
+            // `a.b` in `[a.b = 1] = ...`
+            // `a[0]` in `[a[0] = 1] = ...`
+            return getTargetOfBindingOrAssignmentElement(bindingElement.left);
+        }
+        if (ts.isSpreadElement(bindingElement)) {
+            // `a` in `[...a] = ...`
+            return getTargetOfBindingOrAssignmentElement(bindingElement.expression);
+        }
+        // `a` in `[a] = ...`
+        // `{a}` in `[{a}] = ...`
+        // `[a]` in `[[a]] = ...`
+        // `a.b` in `[a.b] = ...`
+        // `a[0]` in `[a[0]] = ...`
+        return bindingElement;
+    }
+    ts.getTargetOfBindingOrAssignmentElement = getTargetOfBindingOrAssignmentElement;
+    /**
+     * Determines whether an BindingOrAssignmentElement is a rest element.
+     */
+    function getRestIndicatorOfBindingOrAssignmentElement(bindingElement) {
+        switch (bindingElement.kind) {
+            case 149 /* Parameter */:
+            case 182 /* BindingElement */:
+                // `...` in `let [...a] = ...`
+                return bindingElement.dotDotDotToken;
+            case 204 /* SpreadElement */:
+            case 272 /* SpreadAssignment */:
+                // `...` in `[...a] = ...`
+                return bindingElement;
+        }
+        return undefined;
+    }
+    ts.getRestIndicatorOfBindingOrAssignmentElement = getRestIndicatorOfBindingOrAssignmentElement;
+    /**
+     * Gets the property name of a BindingOrAssignmentElement
+     */
+    function getPropertyNameOfBindingOrAssignmentElement(bindingElement) {
+        switch (bindingElement.kind) {
+            case 182 /* BindingElement */:
+                // `a` in `let { a: b } = ...`
+                // `[a]` in `let { [a]: b } = ...`
+                // `"a"` in `let { "a": b } = ...`
+                // `1` in `let { 1: b } = ...`
+                if (bindingElement.propertyName) {
+                    var propertyName = bindingElement.propertyName;
+                    return ts.isComputedPropertyName(propertyName) && ts.isStringOrNumericLiteral(propertyName.expression)
+                        ? propertyName.expression
+                        : propertyName;
+                }
+                break;
+            case 270 /* PropertyAssignment */:
+                // `a` in `({ a: b } = ...)`
+                // `[a]` in `({ [a]: b } = ...)`
+                // `"a"` in `({ "a": b } = ...)`
+                // `1` in `({ 1: b } = ...)`
+                if (bindingElement.name) {
+                    var propertyName = bindingElement.name;
+                    return ts.isComputedPropertyName(propertyName) && ts.isStringOrNumericLiteral(propertyName.expression)
+                        ? propertyName.expression
+                        : propertyName;
+                }
+                break;
+            case 272 /* SpreadAssignment */:
+                // `a` in `({ ...a } = ...)`
+                return bindingElement.name;
+        }
+        var target = getTargetOfBindingOrAssignmentElement(bindingElement);
+        if (target && ts.isPropertyName(target)) {
+            return ts.isComputedPropertyName(target) && ts.isStringOrNumericLiteral(target.expression)
+                ? target.expression
+                : target;
+        }
+        ts.Debug.fail("Invalid property name for binding element.");
+    }
+    ts.getPropertyNameOfBindingOrAssignmentElement = getPropertyNameOfBindingOrAssignmentElement;
+    /**
+     * Gets the elements of a BindingOrAssignmentPattern
+     */
+    function getElementsOfBindingOrAssignmentPattern(name) {
+        switch (name.kind) {
+            case 180 /* ObjectBindingPattern */:
+            case 181 /* ArrayBindingPattern */:
+            case 183 /* ArrayLiteralExpression */:
+                // `a` in `{a}`
+                // `a` in `[a]`
+                return name.elements;
+            case 184 /* ObjectLiteralExpression */:
+                // `a` in `{a}`
+                return name.properties;
+        }
+    }
+    ts.getElementsOfBindingOrAssignmentPattern = getElementsOfBindingOrAssignmentPattern;
+    function convertToArrayAssignmentElement(element) {
+        if (ts.isBindingElement(element)) {
+            if (element.dotDotDotToken) {
+                ts.Debug.assertNode(element.name, ts.isIdentifier);
+                return ts.setOriginalNode(ts.setTextRange(ts.createSpread(element.name), element), element);
+            }
+            var expression = convertToAssignmentElementTarget(element.name);
+            return element.initializer
+                ? ts.setOriginalNode(ts.setTextRange(ts.createAssignment(expression, element.initializer), element), element)
+                : expression;
+        }
+        ts.Debug.assertNode(element, ts.isExpression);
+        return element;
+    }
+    ts.convertToArrayAssignmentElement = convertToArrayAssignmentElement;
+    function convertToObjectAssignmentElement(element) {
+        if (ts.isBindingElement(element)) {
+            if (element.dotDotDotToken) {
+                ts.Debug.assertNode(element.name, ts.isIdentifier);
+                return ts.setOriginalNode(ts.setTextRange(ts.createSpreadAssignment(element.name), element), element);
+            }
+            if (element.propertyName) {
+                var expression = convertToAssignmentElementTarget(element.name);
+                return ts.setOriginalNode(ts.setTextRange(ts.createPropertyAssignment(element.propertyName, element.initializer ? ts.createAssignment(expression, element.initializer) : expression), element), element);
+            }
+            ts.Debug.assertNode(element.name, ts.isIdentifier);
+            return ts.setOriginalNode(ts.setTextRange(ts.createShorthandPropertyAssignment(element.name, element.initializer), element), element);
+        }
+        ts.Debug.assertNode(element, ts.isObjectLiteralElementLike);
+        return element;
+    }
+    ts.convertToObjectAssignmentElement = convertToObjectAssignmentElement;
+    function convertToAssignmentPattern(node) {
+        switch (node.kind) {
+            case 181 /* ArrayBindingPattern */:
+            case 183 /* ArrayLiteralExpression */:
+                return convertToArrayAssignmentPattern(node);
+            case 180 /* ObjectBindingPattern */:
+            case 184 /* ObjectLiteralExpression */:
+                return convertToObjectAssignmentPattern(node);
+        }
+    }
+    ts.convertToAssignmentPattern = convertToAssignmentPattern;
+    function convertToObjectAssignmentPattern(node) {
+        if (ts.isObjectBindingPattern(node)) {
+            return ts.setOriginalNode(ts.setTextRange(ts.createObjectLiteral(ts.map(node.elements, convertToObjectAssignmentElement)), node), node);
+        }
+        ts.Debug.assertNode(node, ts.isObjectLiteralExpression);
+        return node;
+    }
+    ts.convertToObjectAssignmentPattern = convertToObjectAssignmentPattern;
+    function convertToArrayAssignmentPattern(node) {
+        if (ts.isArrayBindingPattern(node)) {
+            return ts.setOriginalNode(ts.setTextRange(ts.createArrayLiteral(ts.map(node.elements, convertToArrayAssignmentElement)), node), node);
+        }
+        ts.Debug.assertNode(node, ts.isArrayLiteralExpression);
+        return node;
+    }
+    ts.convertToArrayAssignmentPattern = convertToArrayAssignmentPattern;
+    function convertToAssignmentElementTarget(node) {
+        if (ts.isBindingPattern(node)) {
+            return convertToAssignmentPattern(node);
+        }
+        ts.Debug.assertNode(node, ts.isExpression);
+        return node;
+    }
+    ts.convertToAssignmentElementTarget = convertToAssignmentElementTarget;
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var isTypeNodeOrTypeParameterDeclaration = ts.or(ts.isTypeNode, ts.isTypeParameterDeclaration);
+    function visitNode(node, visitor, test, lift) {
+        if (node === undefined || visitor === undefined) {
+            return node;
+        }
+        ts.aggregateTransformFlags(node);
+        var visited = visitor(node);
+        if (visited === node) {
+            return node;
+        }
+        var visitedNode;
+        if (visited === undefined) {
+            return undefined;
+        }
+        else if (ts.isArray(visited)) {
+            visitedNode = (lift || extractSingleNode)(visited);
+        }
+        else {
+            visitedNode = visited;
+        }
+        ts.Debug.assertNode(visitedNode, test);
+        ts.aggregateTransformFlags(visitedNode);
+        return visitedNode;
+    }
+    ts.visitNode = visitNode;
+    /**
+     * Visits a NodeArray using the supplied visitor, possibly returning a new NodeArray in its place.
+     *
+     * @param nodes The NodeArray to visit.
+     * @param visitor The callback used to visit a Node.
+     * @param test A node test to execute for each node.
+     * @param start An optional value indicating the starting offset at which to start visiting.
+     * @param count An optional value indicating the maximum number of nodes to visit.
+     */
+    function visitNodes(nodes, visitor, test, start, count) {
+        if (nodes === undefined || visitor === undefined) {
+            return nodes;
+        }
+        var updated;
+        // Ensure start and count have valid values
+        var length = nodes.length;
+        if (start === undefined || start < 0) {
+            start = 0;
+        }
+        if (count === undefined || count > length - start) {
+            count = length - start;
+        }
+        if (start > 0 || count < length) {
+            // If we are not visiting all of the original nodes, we must always create a new array.
+            // Since this is a fragment of a node array, we do not copy over the previous location
+            // and will only copy over `hasTrailingComma` if we are including the last element.
+            updated = ts.createNodeArray([], /*hasTrailingComma*/ nodes.hasTrailingComma && start + count === length);
+        }
+        // Visit each original node.
+        for (var i = 0; i < count; i++) {
+            var node = nodes[i + start];
+            ts.aggregateTransformFlags(node);
+            var visited = node !== undefined ? visitor(node) : undefined;
+            if (updated !== undefined || visited === undefined || visited !== node) {
+                if (updated === undefined) {
+                    // Ensure we have a copy of `nodes`, up to the current index.
+                    updated = ts.createNodeArray(nodes.slice(0, i), nodes.hasTrailingComma);
+                    ts.setTextRange(updated, nodes);
+                }
+                if (visited) {
+                    if (ts.isArray(visited)) {
+                        for (var _i = 0, visited_1 = visited; _i < visited_1.length; _i++) {
+                            var visitedNode = visited_1[_i];
+                            ts.Debug.assertNode(visitedNode, test);
+                            ts.aggregateTransformFlags(visitedNode);
+                            updated.push(visitedNode);
+                        }
+                    }
+                    else {
+                        ts.Debug.assertNode(visited, test);
+                        ts.aggregateTransformFlags(visited);
+                        updated.push(visited);
+                    }
+                }
+            }
+        }
+        return updated || nodes;
+    }
+    ts.visitNodes = visitNodes;
+    /**
+     * Starts a new lexical environment and visits a statement list, ending the lexical environment
+     * and merging hoisted declarations upon completion.
+     */
+    function visitLexicalEnvironment(statements, visitor, context, start, ensureUseStrict) {
+        context.startLexicalEnvironment();
+        statements = visitNodes(statements, visitor, ts.isStatement, start);
+        if (ensureUseStrict && !ts.startsWithUseStrict(statements)) {
+            statements = ts.setTextRange(ts.createNodeArray([ts.createStatement(ts.createLiteral("use strict"))].concat(statements)), statements);
+        }
+        var declarations = context.endLexicalEnvironment();
+        return ts.setTextRange(ts.createNodeArray(ts.concatenate(declarations, statements)), statements);
+    }
+    ts.visitLexicalEnvironment = visitLexicalEnvironment;
+    /**
+     * Starts a new lexical environment and visits a parameter list, suspending the lexical
+     * environment upon completion.
+     */
+    function visitParameterList(nodes, visitor, context, nodesVisitor) {
+        if (nodesVisitor === void 0) { nodesVisitor = visitNodes; }
+        context.startLexicalEnvironment();
+        var updated = nodesVisitor(nodes, visitor, ts.isParameterDeclaration);
+        context.suspendLexicalEnvironment();
+        return updated;
+    }
+    ts.visitParameterList = visitParameterList;
+    function visitFunctionBody(node, visitor, context) {
+        context.resumeLexicalEnvironment();
+        var updated = visitNode(node, visitor, ts.isConciseBody);
+        var declarations = context.endLexicalEnvironment();
+        if (ts.some(declarations)) {
+            var block = ts.convertToFunctionBody(updated);
+            var statements = ts.mergeLexicalEnvironment(block.statements, declarations);
+            return ts.updateBlock(block, statements);
+        }
+        return updated;
+    }
+    ts.visitFunctionBody = visitFunctionBody;
+    function visitEachChild(node, visitor, context, nodesVisitor, tokenVisitor) {
+        if (nodesVisitor === void 0) { nodesVisitor = visitNodes; }
+        if (node === undefined) {
+            return undefined;
+        }
+        var kind = node.kind;
+        // No need to visit nodes with no children.
+        if ((kind > 0 /* FirstToken */ && kind <= 145 /* LastToken */) || kind === 174 /* ThisType */) {
+            return node;
+        }
+        switch (kind) {
+            // Names
+            case 71 /* Identifier */:
+                return ts.updateIdentifier(node, nodesVisitor(node.typeArguments, visitor, isTypeNodeOrTypeParameterDeclaration));
+            case 146 /* QualifiedName */:
+                return ts.updateQualifiedName(node, visitNode(node.left, visitor, ts.isEntityName), visitNode(node.right, visitor, ts.isIdentifier));
+            case 147 /* ComputedPropertyName */:
+                return ts.updateComputedPropertyName(node, visitNode(node.expression, visitor, ts.isExpression));
+            // Signature elements
+            case 148 /* TypeParameter */:
+                return ts.updateTypeParameterDeclaration(node, visitNode(node.name, visitor, ts.isIdentifier), visitNode(node.constraint, visitor, ts.isTypeNode), visitNode(node.default, visitor, ts.isTypeNode));
+            case 149 /* Parameter */:
+                return ts.updateParameter(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.dotDotDotToken, tokenVisitor, ts.isToken), visitNode(node.name, visitor, ts.isBindingName), visitNode(node.questionToken, tokenVisitor, ts.isToken), visitNode(node.type, visitor, ts.isTypeNode), visitNode(node.initializer, visitor, ts.isExpression));
+            case 150 /* Decorator */:
+                return ts.updateDecorator(node, visitNode(node.expression, visitor, ts.isExpression));
+            // Type elements
+            case 151 /* PropertySignature */:
+                return ts.updatePropertySignature(node, nodesVisitor(node.modifiers, visitor, ts.isToken), visitNode(node.name, visitor, ts.isPropertyName), visitNode(node.questionToken, tokenVisitor, ts.isToken), visitNode(node.type, visitor, ts.isTypeNode), visitNode(node.initializer, visitor, ts.isExpression));
+            case 152 /* PropertyDeclaration */:
+                return ts.updateProperty(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isPropertyName), visitNode(node.questionToken, tokenVisitor, ts.isToken), visitNode(node.type, visitor, ts.isTypeNode), visitNode(node.initializer, visitor, ts.isExpression));
+            case 153 /* MethodSignature */:
+                return ts.updateMethodSignature(node, nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), nodesVisitor(node.parameters, visitor, ts.isParameterDeclaration), visitNode(node.type, visitor, ts.isTypeNode), visitNode(node.name, visitor, ts.isPropertyName), visitNode(node.questionToken, tokenVisitor, ts.isToken));
+            case 154 /* MethodDeclaration */:
+                return ts.updateMethod(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.asteriskToken, tokenVisitor, ts.isToken), visitNode(node.name, visitor, ts.isPropertyName), visitNode(node.questionToken, tokenVisitor, ts.isToken), nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), visitParameterList(node.parameters, visitor, context, nodesVisitor), visitNode(node.type, visitor, ts.isTypeNode), visitFunctionBody(node.body, visitor, context));
+            case 155 /* Constructor */:
+                return ts.updateConstructor(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitParameterList(node.parameters, visitor, context, nodesVisitor), visitFunctionBody(node.body, visitor, context));
+            case 156 /* GetAccessor */:
+                return ts.updateGetAccessor(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isPropertyName), visitParameterList(node.parameters, visitor, context, nodesVisitor), visitNode(node.type, visitor, ts.isTypeNode), visitFunctionBody(node.body, visitor, context));
+            case 157 /* SetAccessor */:
+                return ts.updateSetAccessor(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isPropertyName), visitParameterList(node.parameters, visitor, context, nodesVisitor), visitFunctionBody(node.body, visitor, context));
+            case 158 /* CallSignature */:
+                return ts.updateCallSignature(node, nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), nodesVisitor(node.parameters, visitor, ts.isParameterDeclaration), visitNode(node.type, visitor, ts.isTypeNode));
+            case 159 /* ConstructSignature */:
+                return ts.updateConstructSignature(node, nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), nodesVisitor(node.parameters, visitor, ts.isParameterDeclaration), visitNode(node.type, visitor, ts.isTypeNode));
+            case 160 /* IndexSignature */:
+                return ts.updateIndexSignature(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), nodesVisitor(node.parameters, visitor, ts.isParameterDeclaration), visitNode(node.type, visitor, ts.isTypeNode));
+            // Types
+            case 161 /* TypePredicate */:
+                return ts.updateTypePredicateNode(node, visitNode(node.parameterName, visitor), visitNode(node.type, visitor, ts.isTypeNode));
+            case 162 /* TypeReference */:
+                return ts.updateTypeReferenceNode(node, visitNode(node.typeName, visitor, ts.isEntityName), nodesVisitor(node.typeArguments, visitor, ts.isTypeNode));
+            case 163 /* FunctionType */:
+                return ts.updateFunctionTypeNode(node, nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), nodesVisitor(node.parameters, visitor, ts.isParameterDeclaration), visitNode(node.type, visitor, ts.isTypeNode));
+            case 164 /* ConstructorType */:
+                return ts.updateConstructorTypeNode(node, nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), nodesVisitor(node.parameters, visitor, ts.isParameterDeclaration), visitNode(node.type, visitor, ts.isTypeNode));
+            case 165 /* TypeQuery */:
+                return ts.updateTypeQueryNode(node, visitNode(node.exprName, visitor, ts.isEntityName));
+            case 166 /* TypeLiteral */:
+                return ts.updateTypeLiteralNode(node, nodesVisitor(node.members, visitor, ts.isTypeElement));
+            case 167 /* ArrayType */:
+                return ts.updateArrayTypeNode(node, visitNode(node.elementType, visitor, ts.isTypeNode));
+            case 168 /* TupleType */:
+                return ts.updateTypleTypeNode(node, nodesVisitor(node.elementTypes, visitor, ts.isTypeNode));
+            case 169 /* UnionType */:
+                return ts.updateUnionTypeNode(node, nodesVisitor(node.types, visitor, ts.isTypeNode));
+            case 170 /* IntersectionType */:
+                return ts.updateIntersectionTypeNode(node, nodesVisitor(node.types, visitor, ts.isTypeNode));
+            case 171 /* ConditionalType */:
+                return ts.updateConditionalTypeNode(node, visitNode(node.checkType, visitor, ts.isTypeNode), visitNode(node.extendsType, visitor, ts.isTypeNode), visitNode(node.trueType, visitor, ts.isTypeNode), visitNode(node.falseType, visitor, ts.isTypeNode));
+            case 172 /* InferType */:
+                return ts.updateInferTypeNode(node, visitNode(node.typeParameter, visitor, ts.isTypeParameterDeclaration));
+            case 179 /* ImportType */:
+                return ts.updateImportTypeNode(node, visitNode(node.argument, visitor, ts.isTypeNode), visitNode(node.qualifier, visitor, ts.isEntityName), visitNodes(node.typeArguments, visitor, ts.isTypeNode), node.isTypeOf);
+            case 173 /* ParenthesizedType */:
+                return ts.updateParenthesizedType(node, visitNode(node.type, visitor, ts.isTypeNode));
+            case 175 /* TypeOperator */:
+                return ts.updateTypeOperatorNode(node, visitNode(node.type, visitor, ts.isTypeNode));
+            case 176 /* IndexedAccessType */:
+                return ts.updateIndexedAccessTypeNode(node, visitNode(node.objectType, visitor, ts.isTypeNode), visitNode(node.indexType, visitor, ts.isTypeNode));
+            case 177 /* MappedType */:
+                return ts.updateMappedTypeNode(node, visitNode(node.readonlyToken, tokenVisitor, ts.isToken), visitNode(node.typeParameter, visitor, ts.isTypeParameterDeclaration), visitNode(node.questionToken, tokenVisitor, ts.isToken), visitNode(node.type, visitor, ts.isTypeNode));
+            case 178 /* LiteralType */:
+                return ts.updateLiteralTypeNode(node, visitNode(node.literal, visitor, ts.isExpression));
+            // Binding patterns
+            case 180 /* ObjectBindingPattern */:
+                return ts.updateObjectBindingPattern(node, nodesVisitor(node.elements, visitor, ts.isBindingElement));
+            case 181 /* ArrayBindingPattern */:
+                return ts.updateArrayBindingPattern(node, nodesVisitor(node.elements, visitor, ts.isArrayBindingElement));
+            case 182 /* BindingElement */:
+                return ts.updateBindingElement(node, visitNode(node.dotDotDotToken, tokenVisitor, ts.isToken), visitNode(node.propertyName, visitor, ts.isPropertyName), visitNode(node.name, visitor, ts.isBindingName), visitNode(node.initializer, visitor, ts.isExpression));
+            // Expression
+            case 183 /* ArrayLiteralExpression */:
+                return ts.updateArrayLiteral(node, nodesVisitor(node.elements, visitor, ts.isExpression));
+            case 184 /* ObjectLiteralExpression */:
+                return ts.updateObjectLiteral(node, nodesVisitor(node.properties, visitor, ts.isObjectLiteralElementLike));
+            case 185 /* PropertyAccessExpression */:
+                return ts.updatePropertyAccess(node, visitNode(node.expression, visitor, ts.isExpression), visitNode(node.name, visitor, ts.isIdentifier));
+            case 186 /* ElementAccessExpression */:
+                return ts.updateElementAccess(node, visitNode(node.expression, visitor, ts.isExpression), visitNode(node.argumentExpression, visitor, ts.isExpression));
+            case 187 /* CallExpression */:
+                return ts.updateCall(node, visitNode(node.expression, visitor, ts.isExpression), nodesVisitor(node.typeArguments, visitor, ts.isTypeNode), nodesVisitor(node.arguments, visitor, ts.isExpression));
+            case 188 /* NewExpression */:
+                return ts.updateNew(node, visitNode(node.expression, visitor, ts.isExpression), nodesVisitor(node.typeArguments, visitor, ts.isTypeNode), nodesVisitor(node.arguments, visitor, ts.isExpression));
+            case 189 /* TaggedTemplateExpression */:
+                return ts.updateTaggedTemplate(node, visitNode(node.tag, visitor, ts.isExpression), visitNodes(node.typeArguments, visitor, ts.isExpression), visitNode(node.template, visitor, ts.isTemplateLiteral));
+            case 190 /* TypeAssertionExpression */:
+                return ts.updateTypeAssertion(node, visitNode(node.type, visitor, ts.isTypeNode), visitNode(node.expression, visitor, ts.isExpression));
+            case 191 /* ParenthesizedExpression */:
+                return ts.updateParen(node, visitNode(node.expression, visitor, ts.isExpression));
+            case 192 /* FunctionExpression */:
+                return ts.updateFunctionExpression(node, nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.asteriskToken, tokenVisitor, ts.isToken), visitNode(node.name, visitor, ts.isIdentifier), nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), visitParameterList(node.parameters, visitor, context, nodesVisitor), visitNode(node.type, visitor, ts.isTypeNode), visitFunctionBody(node.body, visitor, context));
+            case 193 /* ArrowFunction */:
+                return ts.updateArrowFunction(node, nodesVisitor(node.modifiers, visitor, ts.isModifier), nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), visitParameterList(node.parameters, visitor, context, nodesVisitor), visitNode(node.type, visitor, ts.isTypeNode), visitNode(node.equalsGreaterThanToken, visitor, ts.isToken), visitFunctionBody(node.body, visitor, context));
+            case 194 /* DeleteExpression */:
+                return ts.updateDelete(node, visitNode(node.expression, visitor, ts.isExpression));
+            case 195 /* TypeOfExpression */:
+                return ts.updateTypeOf(node, visitNode(node.expression, visitor, ts.isExpression));
+            case 196 /* VoidExpression */:
+                return ts.updateVoid(node, visitNode(node.expression, visitor, ts.isExpression));
+            case 197 /* AwaitExpression */:
+                return ts.updateAwait(node, visitNode(node.expression, visitor, ts.isExpression));
+            case 198 /* PrefixUnaryExpression */:
+                return ts.updatePrefix(node, visitNode(node.operand, visitor, ts.isExpression));
+            case 199 /* PostfixUnaryExpression */:
+                return ts.updatePostfix(node, visitNode(node.operand, visitor, ts.isExpression));
+            case 200 /* BinaryExpression */:
+                return ts.updateBinary(node, visitNode(node.left, visitor, ts.isExpression), visitNode(node.right, visitor, ts.isExpression), visitNode(node.operatorToken, visitor, ts.isToken));
+            case 201 /* ConditionalExpression */:
+                return ts.updateConditional(node, visitNode(node.condition, visitor, ts.isExpression), visitNode(node.questionToken, visitor, ts.isToken), visitNode(node.whenTrue, visitor, ts.isExpression), visitNode(node.colonToken, visitor, ts.isToken), visitNode(node.whenFalse, visitor, ts.isExpression));
+            case 202 /* TemplateExpression */:
+                return ts.updateTemplateExpression(node, visitNode(node.head, visitor, ts.isTemplateHead), nodesVisitor(node.templateSpans, visitor, ts.isTemplateSpan));
+            case 203 /* YieldExpression */:
+                return ts.updateYield(node, visitNode(node.asteriskToken, tokenVisitor, ts.isToken), visitNode(node.expression, visitor, ts.isExpression));
+            case 204 /* SpreadElement */:
+                return ts.updateSpread(node, visitNode(node.expression, visitor, ts.isExpression));
+            case 205 /* ClassExpression */:
+                return ts.updateClassExpression(node, nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isIdentifier), nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), nodesVisitor(node.heritageClauses, visitor, ts.isHeritageClause), nodesVisitor(node.members, visitor, ts.isClassElement));
+            case 207 /* ExpressionWithTypeArguments */:
+                return ts.updateExpressionWithTypeArguments(node, nodesVisitor(node.typeArguments, visitor, ts.isTypeNode), visitNode(node.expression, visitor, ts.isExpression));
+            case 208 /* AsExpression */:
+                return ts.updateAsExpression(node, visitNode(node.expression, visitor, ts.isExpression), visitNode(node.type, visitor, ts.isTypeNode));
+            case 209 /* NonNullExpression */:
+                return ts.updateNonNullExpression(node, visitNode(node.expression, visitor, ts.isExpression));
+            case 210 /* MetaProperty */:
+                return ts.updateMetaProperty(node, visitNode(node.name, visitor, ts.isIdentifier));
+            // Misc
+            case 211 /* TemplateSpan */:
+                return ts.updateTemplateSpan(node, visitNode(node.expression, visitor, ts.isExpression), visitNode(node.literal, visitor, ts.isTemplateMiddleOrTemplateTail));
+            // Element
+            case 213 /* Block */:
+                return ts.updateBlock(node, nodesVisitor(node.statements, visitor, ts.isStatement));
+            case 214 /* VariableStatement */:
+                return ts.updateVariableStatement(node, nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.declarationList, visitor, ts.isVariableDeclarationList));
+            case 216 /* ExpressionStatement */:
+                return ts.updateStatement(node, visitNode(node.expression, visitor, ts.isExpression));
+            case 217 /* IfStatement */:
+                return ts.updateIf(node, visitNode(node.expression, visitor, ts.isExpression), visitNode(node.thenStatement, visitor, ts.isStatement, ts.liftToBlock), visitNode(node.elseStatement, visitor, ts.isStatement, ts.liftToBlock));
+            case 218 /* DoStatement */:
+                return ts.updateDo(node, visitNode(node.statement, visitor, ts.isStatement, ts.liftToBlock), visitNode(node.expression, visitor, ts.isExpression));
+            case 219 /* WhileStatement */:
+                return ts.updateWhile(node, visitNode(node.expression, visitor, ts.isExpression), visitNode(node.statement, visitor, ts.isStatement, ts.liftToBlock));
+            case 220 /* ForStatement */:
+                return ts.updateFor(node, visitNode(node.initializer, visitor, ts.isForInitializer), visitNode(node.condition, visitor, ts.isExpression), visitNode(node.incrementor, visitor, ts.isExpression), visitNode(node.statement, visitor, ts.isStatement, ts.liftToBlock));
+            case 221 /* ForInStatement */:
+                return ts.updateForIn(node, visitNode(node.initializer, visitor, ts.isForInitializer), visitNode(node.expression, visitor, ts.isExpression), visitNode(node.statement, visitor, ts.isStatement, ts.liftToBlock));
+            case 222 /* ForOfStatement */:
+                return ts.updateForOf(node, visitNode(node.awaitModifier, visitor, ts.isToken), visitNode(node.initializer, visitor, ts.isForInitializer), visitNode(node.expression, visitor, ts.isExpression), visitNode(node.statement, visitor, ts.isStatement, ts.liftToBlock));
+            case 223 /* ContinueStatement */:
+                return ts.updateContinue(node, visitNode(node.label, visitor, ts.isIdentifier));
+            case 224 /* BreakStatement */:
+                return ts.updateBreak(node, visitNode(node.label, visitor, ts.isIdentifier));
+            case 225 /* ReturnStatement */:
+                return ts.updateReturn(node, visitNode(node.expression, visitor, ts.isExpression));
+            case 226 /* WithStatement */:
+                return ts.updateWith(node, visitNode(node.expression, visitor, ts.isExpression), visitNode(node.statement, visitor, ts.isStatement, ts.liftToBlock));
+            case 227 /* SwitchStatement */:
+                return ts.updateSwitch(node, visitNode(node.expression, visitor, ts.isExpression), visitNode(node.caseBlock, visitor, ts.isCaseBlock));
+            case 228 /* LabeledStatement */:
+                return ts.updateLabel(node, visitNode(node.label, visitor, ts.isIdentifier), visitNode(node.statement, visitor, ts.isStatement, ts.liftToBlock));
+            case 229 /* ThrowStatement */:
+                return ts.updateThrow(node, visitNode(node.expression, visitor, ts.isExpression));
+            case 230 /* TryStatement */:
+                return ts.updateTry(node, visitNode(node.tryBlock, visitor, ts.isBlock), visitNode(node.catchClause, visitor, ts.isCatchClause), visitNode(node.finallyBlock, visitor, ts.isBlock));
+            case 232 /* VariableDeclaration */:
+                return ts.updateVariableDeclaration(node, visitNode(node.name, visitor, ts.isBindingName), visitNode(node.type, visitor, ts.isTypeNode), visitNode(node.initializer, visitor, ts.isExpression));
+            case 233 /* VariableDeclarationList */:
+                return ts.updateVariableDeclarationList(node, nodesVisitor(node.declarations, visitor, ts.isVariableDeclaration));
+            case 234 /* FunctionDeclaration */:
+                return ts.updateFunctionDeclaration(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.asteriskToken, tokenVisitor, ts.isToken), visitNode(node.name, visitor, ts.isIdentifier), nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), visitParameterList(node.parameters, visitor, context, nodesVisitor), visitNode(node.type, visitor, ts.isTypeNode), visitFunctionBody(node.body, visitor, context));
+            case 235 /* ClassDeclaration */:
+                return ts.updateClassDeclaration(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isIdentifier), nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), nodesVisitor(node.heritageClauses, visitor, ts.isHeritageClause), nodesVisitor(node.members, visitor, ts.isClassElement));
+            case 236 /* InterfaceDeclaration */:
+                return ts.updateInterfaceDeclaration(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isIdentifier), nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), nodesVisitor(node.heritageClauses, visitor, ts.isHeritageClause), nodesVisitor(node.members, visitor, ts.isTypeElement));
+            case 237 /* TypeAliasDeclaration */:
+                return ts.updateTypeAliasDeclaration(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isIdentifier), nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), visitNode(node.type, visitor, ts.isTypeNode));
+            case 238 /* EnumDeclaration */:
+                return ts.updateEnumDeclaration(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isIdentifier), nodesVisitor(node.members, visitor, ts.isEnumMember));
+            case 239 /* ModuleDeclaration */:
+                return ts.updateModuleDeclaration(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isIdentifier), visitNode(node.body, visitor, ts.isModuleBody));
+            case 240 /* ModuleBlock */:
+                return ts.updateModuleBlock(node, nodesVisitor(node.statements, visitor, ts.isStatement));
+            case 241 /* CaseBlock */:
+                return ts.updateCaseBlock(node, nodesVisitor(node.clauses, visitor, ts.isCaseOrDefaultClause));
+            case 242 /* NamespaceExportDeclaration */:
+                return ts.updateNamespaceExportDeclaration(node, visitNode(node.name, visitor, ts.isIdentifier));
+            case 243 /* ImportEqualsDeclaration */:
+                return ts.updateImportEqualsDeclaration(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isIdentifier), visitNode(node.moduleReference, visitor, ts.isModuleReference));
+            case 244 /* ImportDeclaration */:
+                return ts.updateImportDeclaration(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.importClause, visitor, ts.isImportClause), visitNode(node.moduleSpecifier, visitor, ts.isExpression));
+            case 245 /* ImportClause */:
+                return ts.updateImportClause(node, visitNode(node.name, visitor, ts.isIdentifier), visitNode(node.namedBindings, visitor, ts.isNamedImportBindings));
+            case 246 /* NamespaceImport */:
+                return ts.updateNamespaceImport(node, visitNode(node.name, visitor, ts.isIdentifier));
+            case 247 /* NamedImports */:
+                return ts.updateNamedImports(node, nodesVisitor(node.elements, visitor, ts.isImportSpecifier));
+            case 248 /* ImportSpecifier */:
+                return ts.updateImportSpecifier(node, visitNode(node.propertyName, visitor, ts.isIdentifier), visitNode(node.name, visitor, ts.isIdentifier));
+            case 249 /* ExportAssignment */:
+                return ts.updateExportAssignment(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.expression, visitor, ts.isExpression));
+            case 250 /* ExportDeclaration */:
+                return ts.updateExportDeclaration(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.exportClause, visitor, ts.isNamedExports), visitNode(node.moduleSpecifier, visitor, ts.isExpression));
+            case 251 /* NamedExports */:
+                return ts.updateNamedExports(node, nodesVisitor(node.elements, visitor, ts.isExportSpecifier));
+            case 252 /* ExportSpecifier */:
+                return ts.updateExportSpecifier(node, visitNode(node.propertyName, visitor, ts.isIdentifier), visitNode(node.name, visitor, ts.isIdentifier));
+            // Module references
+            case 254 /* ExternalModuleReference */:
+                return ts.updateExternalModuleReference(node, visitNode(node.expression, visitor, ts.isExpression));
+            // JSX
+            case 255 /* JsxElement */:
+                return ts.updateJsxElement(node, visitNode(node.openingElement, visitor, ts.isJsxOpeningElement), nodesVisitor(node.children, visitor, ts.isJsxChild), visitNode(node.closingElement, visitor, ts.isJsxClosingElement));
+            case 256 /* JsxSelfClosingElement */:
+                return ts.updateJsxSelfClosingElement(node, visitNode(node.tagName, visitor, ts.isJsxTagNameExpression), nodesVisitor(node.typeArguments, visitor, ts.isTypeNode), visitNode(node.attributes, visitor, ts.isJsxAttributes));
+            case 257 /* JsxOpeningElement */:
+                return ts.updateJsxOpeningElement(node, visitNode(node.tagName, visitor, ts.isJsxTagNameExpression), nodesVisitor(node.typeArguments, visitor, ts.isTypeNode), visitNode(node.attributes, visitor, ts.isJsxAttributes));
+            case 258 /* JsxClosingElement */:
+                return ts.updateJsxClosingElement(node, visitNode(node.tagName, visitor, ts.isJsxTagNameExpression));
+            case 259 /* JsxFragment */:
+                return ts.updateJsxFragment(node, visitNode(node.openingFragment, visitor, ts.isJsxOpeningFragment), nodesVisitor(node.children, visitor, ts.isJsxChild), visitNode(node.closingFragment, visitor, ts.isJsxClosingFragment));
+            case 262 /* JsxAttribute */:
+                return ts.updateJsxAttribute(node, visitNode(node.name, visitor, ts.isIdentifier), visitNode(node.initializer, visitor, ts.isStringLiteralOrJsxExpression));
+            case 263 /* JsxAttributes */:
+                return ts.updateJsxAttributes(node, nodesVisitor(node.properties, visitor, ts.isJsxAttributeLike));
+            case 264 /* JsxSpreadAttribute */:
+                return ts.updateJsxSpreadAttribute(node, visitNode(node.expression, visitor, ts.isExpression));
+            case 265 /* JsxExpression */:
+                return ts.updateJsxExpression(node, visitNode(node.expression, visitor, ts.isExpression));
+            // Clauses
+            case 266 /* CaseClause */:
+                return ts.updateCaseClause(node, visitNode(node.expression, visitor, ts.isExpression), nodesVisitor(node.statements, visitor, ts.isStatement));
+            case 267 /* DefaultClause */:
+                return ts.updateDefaultClause(node, nodesVisitor(node.statements, visitor, ts.isStatement));
+            case 268 /* HeritageClause */:
+                return ts.updateHeritageClause(node, nodesVisitor(node.types, visitor, ts.isExpressionWithTypeArguments));
+            case 269 /* CatchClause */:
+                return ts.updateCatchClause(node, visitNode(node.variableDeclaration, visitor, ts.isVariableDeclaration), visitNode(node.block, visitor, ts.isBlock));
+            // Property assignments
+            case 270 /* PropertyAssignment */:
+                return ts.updatePropertyAssignment(node, visitNode(node.name, visitor, ts.isPropertyName), visitNode(node.initializer, visitor, ts.isExpression));
+            case 271 /* ShorthandPropertyAssignment */:
+                return ts.updateShorthandPropertyAssignment(node, visitNode(node.name, visitor, ts.isIdentifier), visitNode(node.objectAssignmentInitializer, visitor, ts.isExpression));
+            case 272 /* SpreadAssignment */:
+                return ts.updateSpreadAssignment(node, visitNode(node.expression, visitor, ts.isExpression));
+            // Enum
+            case 273 /* EnumMember */:
+                return ts.updateEnumMember(node, visitNode(node.name, visitor, ts.isPropertyName), visitNode(node.initializer, visitor, ts.isExpression));
+            // Top-level nodes
+            case 274 /* SourceFile */:
+                return ts.updateSourceFileNode(node, visitLexicalEnvironment(node.statements, visitor, context));
+            // Transformation nodes
+            case 301 /* PartiallyEmittedExpression */:
+                return ts.updatePartiallyEmittedExpression(node, visitNode(node.expression, visitor, ts.isExpression));
+            case 302 /* CommaListExpression */:
+                return ts.updateCommaList(node, nodesVisitor(node.elements, visitor, ts.isExpression));
+            default:
+                // No need to visit nodes with no children.
+                return node;
+        }
+    }
+    ts.visitEachChild = visitEachChild;
+    /**
+     * Extracts the single node from a NodeArray.
+     *
+     * @param nodes The NodeArray.
+     */
+    function extractSingleNode(nodes) {
+        ts.Debug.assert(nodes.length <= 1, "Too many nodes written to output.");
+        return ts.singleOrUndefined(nodes);
+    }
+})(ts || (ts = {}));
+/* @internal */
+(function (ts) {
+    function reduceNode(node, f, initial) {
+        return node ? f(initial, node) : initial;
+    }
+    function reduceNodeArray(nodes, f, initial) {
+        return nodes ? f(initial, nodes) : initial;
+    }
+    /**
+     * Similar to `reduceLeft`, performs a reduction against each child of a node.
+     * NOTE: Unlike `forEachChild`, this does *not* visit every node.
+     *
+     * @param node The node containing the children to reduce.
+     * @param initial The initial value to supply to the reduction.
+     * @param f The callback function
+     */
+    function reduceEachChild(node, initial, cbNode, cbNodeArray) {
+        if (node === undefined) {
+            return initial;
+        }
+        var reduceNodes = cbNodeArray ? reduceNodeArray : ts.reduceLeft;
+        var cbNodes = cbNodeArray || cbNode;
+        var kind = node.kind;
+        // No need to visit nodes with no children.
+        if ((kind > 0 /* FirstToken */ && kind <= 145 /* LastToken */)) {
+            return initial;
+        }
+        // We do not yet support types.
+        if ((kind >= 161 /* TypePredicate */ && kind <= 178 /* LiteralType */)) {
+            return initial;
+        }
+        var result = initial;
+        switch (node.kind) {
+            // Leaf nodes
+            case 212 /* SemicolonClassElement */:
+            case 215 /* EmptyStatement */:
+            case 206 /* OmittedExpression */:
+            case 231 /* DebuggerStatement */:
+            case 300 /* NotEmittedStatement */:
+                // No need to visit nodes with no children.
+                break;
+            // Names
+            case 146 /* QualifiedName */:
+                result = reduceNode(node.left, cbNode, result);
+                result = reduceNode(node.right, cbNode, result);
+                break;
+            case 147 /* ComputedPropertyName */:
+                result = reduceNode(node.expression, cbNode, result);
+                break;
+            // Signature elements
+            case 149 /* Parameter */:
+                result = reduceNodes(node.decorators, cbNodes, result);
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNode(node.type, cbNode, result);
+                result = reduceNode(node.initializer, cbNode, result);
+                break;
+            case 150 /* Decorator */:
+                result = reduceNode(node.expression, cbNode, result);
+                break;
+            // Type member
+            case 151 /* PropertySignature */:
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNode(node.questionToken, cbNode, result);
+                result = reduceNode(node.type, cbNode, result);
+                result = reduceNode(node.initializer, cbNode, result);
+                break;
+            case 152 /* PropertyDeclaration */:
+                result = reduceNodes(node.decorators, cbNodes, result);
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNode(node.type, cbNode, result);
+                result = reduceNode(node.initializer, cbNode, result);
+                break;
+            case 154 /* MethodDeclaration */:
+                result = reduceNodes(node.decorators, cbNodes, result);
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNodes(node.typeParameters, cbNodes, result);
+                result = reduceNodes(node.parameters, cbNodes, result);
+                result = reduceNode(node.type, cbNode, result);
+                result = reduceNode(node.body, cbNode, result);
+                break;
+            case 155 /* Constructor */:
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNodes(node.parameters, cbNodes, result);
+                result = reduceNode(node.body, cbNode, result);
+                break;
+            case 156 /* GetAccessor */:
+                result = reduceNodes(node.decorators, cbNodes, result);
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNodes(node.parameters, cbNodes, result);
+                result = reduceNode(node.type, cbNode, result);
+                result = reduceNode(node.body, cbNode, result);
+                break;
+            case 157 /* SetAccessor */:
+                result = reduceNodes(node.decorators, cbNodes, result);
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNodes(node.parameters, cbNodes, result);
+                result = reduceNode(node.body, cbNode, result);
+                break;
+            // Binding patterns
+            case 180 /* ObjectBindingPattern */:
+            case 181 /* ArrayBindingPattern */:
+                result = reduceNodes(node.elements, cbNodes, result);
+                break;
+            case 182 /* BindingElement */:
+                result = reduceNode(node.propertyName, cbNode, result);
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNode(node.initializer, cbNode, result);
+                break;
+            // Expression
+            case 183 /* ArrayLiteralExpression */:
+                result = reduceNodes(node.elements, cbNodes, result);
+                break;
+            case 184 /* ObjectLiteralExpression */:
+                result = reduceNodes(node.properties, cbNodes, result);
+                break;
+            case 185 /* PropertyAccessExpression */:
+                result = reduceNode(node.expression, cbNode, result);
+                result = reduceNode(node.name, cbNode, result);
+                break;
+            case 186 /* ElementAccessExpression */:
+                result = reduceNode(node.expression, cbNode, result);
+                result = reduceNode(node.argumentExpression, cbNode, result);
+                break;
+            case 187 /* CallExpression */:
+                result = reduceNode(node.expression, cbNode, result);
+                result = reduceNodes(node.typeArguments, cbNodes, result);
+                result = reduceNodes(node.arguments, cbNodes, result);
+                break;
+            case 188 /* NewExpression */:
+                result = reduceNode(node.expression, cbNode, result);
+                result = reduceNodes(node.typeArguments, cbNodes, result);
+                result = reduceNodes(node.arguments, cbNodes, result);
+                break;
+            case 189 /* TaggedTemplateExpression */:
+                result = reduceNode(node.tag, cbNode, result);
+                result = reduceNode(node.template, cbNode, result);
+                break;
+            case 190 /* TypeAssertionExpression */:
+                result = reduceNode(node.type, cbNode, result);
+                result = reduceNode(node.expression, cbNode, result);
+                break;
+            case 192 /* FunctionExpression */:
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNodes(node.typeParameters, cbNodes, result);
+                result = reduceNodes(node.parameters, cbNodes, result);
+                result = reduceNode(node.type, cbNode, result);
+                result = reduceNode(node.body, cbNode, result);
+                break;
+            case 193 /* ArrowFunction */:
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNodes(node.typeParameters, cbNodes, result);
+                result = reduceNodes(node.parameters, cbNodes, result);
+                result = reduceNode(node.type, cbNode, result);
+                result = reduceNode(node.body, cbNode, result);
+                break;
+            case 191 /* ParenthesizedExpression */:
+            case 194 /* DeleteExpression */:
+            case 195 /* TypeOfExpression */:
+            case 196 /* VoidExpression */:
+            case 197 /* AwaitExpression */:
+            case 203 /* YieldExpression */:
+            case 204 /* SpreadElement */:
+            case 209 /* NonNullExpression */:
+                result = reduceNode(node.expression, cbNode, result);
+                break;
+            case 198 /* PrefixUnaryExpression */:
+            case 199 /* PostfixUnaryExpression */:
+                result = reduceNode(node.operand, cbNode, result);
+                break;
+            case 200 /* BinaryExpression */:
+                result = reduceNode(node.left, cbNode, result);
+                result = reduceNode(node.right, cbNode, result);
+                break;
+            case 201 /* ConditionalExpression */:
+                result = reduceNode(node.condition, cbNode, result);
+                result = reduceNode(node.whenTrue, cbNode, result);
+                result = reduceNode(node.whenFalse, cbNode, result);
+                break;
+            case 202 /* TemplateExpression */:
+                result = reduceNode(node.head, cbNode, result);
+                result = reduceNodes(node.templateSpans, cbNodes, result);
+                break;
+            case 205 /* ClassExpression */:
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNodes(node.typeParameters, cbNodes, result);
+                result = reduceNodes(node.heritageClauses, cbNodes, result);
+                result = reduceNodes(node.members, cbNodes, result);
+                break;
+            case 207 /* ExpressionWithTypeArguments */:
+                result = reduceNode(node.expression, cbNode, result);
+                result = reduceNodes(node.typeArguments, cbNodes, result);
+                break;
+            case 208 /* AsExpression */:
+                result = reduceNode(node.expression, cbNode, result);
+                result = reduceNode(node.type, cbNode, result);
+                break;
+            // Misc
+            case 211 /* TemplateSpan */:
+                result = reduceNode(node.expression, cbNode, result);
+                result = reduceNode(node.literal, cbNode, result);
+                break;
+            // Element
+            case 213 /* Block */:
+                result = reduceNodes(node.statements, cbNodes, result);
+                break;
+            case 214 /* VariableStatement */:
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNode(node.declarationList, cbNode, result);
+                break;
+            case 216 /* ExpressionStatement */:
+                result = reduceNode(node.expression, cbNode, result);
+                break;
+            case 217 /* IfStatement */:
+                result = reduceNode(node.expression, cbNode, result);
+                result = reduceNode(node.thenStatement, cbNode, result);
+                result = reduceNode(node.elseStatement, cbNode, result);
+                break;
+            case 218 /* DoStatement */:
+                result = reduceNode(node.statement, cbNode, result);
+                result = reduceNode(node.expression, cbNode, result);
+                break;
+            case 219 /* WhileStatement */:
+            case 226 /* WithStatement */:
+                result = reduceNode(node.expression, cbNode, result);
+                result = reduceNode(node.statement, cbNode, result);
+                break;
+            case 220 /* ForStatement */:
+                result = reduceNode(node.initializer, cbNode, result);
+                result = reduceNode(node.condition, cbNode, result);
+                result = reduceNode(node.incrementor, cbNode, result);
+                result = reduceNode(node.statement, cbNode, result);
+                break;
+            case 221 /* ForInStatement */:
+            case 222 /* ForOfStatement */:
+                result = reduceNode(node.initializer, cbNode, result);
+                result = reduceNode(node.expression, cbNode, result);
+                result = reduceNode(node.statement, cbNode, result);
+                break;
+            case 225 /* ReturnStatement */:
+            case 229 /* ThrowStatement */:
+                result = reduceNode(node.expression, cbNode, result);
+                break;
+            case 227 /* SwitchStatement */:
+                result = reduceNode(node.expression, cbNode, result);
+                result = reduceNode(node.caseBlock, cbNode, result);
+                break;
+            case 228 /* LabeledStatement */:
+                result = reduceNode(node.label, cbNode, result);
+                result = reduceNode(node.statement, cbNode, result);
+                break;
+            case 230 /* TryStatement */:
+                result = reduceNode(node.tryBlock, cbNode, result);
+                result = reduceNode(node.catchClause, cbNode, result);
+                result = reduceNode(node.finallyBlock, cbNode, result);
+                break;
+            case 232 /* VariableDeclaration */:
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNode(node.type, cbNode, result);
+                result = reduceNode(node.initializer, cbNode, result);
+                break;
+            case 233 /* VariableDeclarationList */:
+                result = reduceNodes(node.declarations, cbNodes, result);
+                break;
+            case 234 /* FunctionDeclaration */:
+                result = reduceNodes(node.decorators, cbNodes, result);
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNodes(node.typeParameters, cbNodes, result);
+                result = reduceNodes(node.parameters, cbNodes, result);
+                result = reduceNode(node.type, cbNode, result);
+                result = reduceNode(node.body, cbNode, result);
+                break;
+            case 235 /* ClassDeclaration */:
+                result = reduceNodes(node.decorators, cbNodes, result);
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNodes(node.typeParameters, cbNodes, result);
+                result = reduceNodes(node.heritageClauses, cbNodes, result);
+                result = reduceNodes(node.members, cbNodes, result);
+                break;
+            case 238 /* EnumDeclaration */:
+                result = reduceNodes(node.decorators, cbNodes, result);
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNodes(node.members, cbNodes, result);
+                break;
+            case 239 /* ModuleDeclaration */:
+                result = reduceNodes(node.decorators, cbNodes, result);
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNode(node.body, cbNode, result);
+                break;
+            case 240 /* ModuleBlock */:
+                result = reduceNodes(node.statements, cbNodes, result);
+                break;
+            case 241 /* CaseBlock */:
+                result = reduceNodes(node.clauses, cbNodes, result);
+                break;
+            case 243 /* ImportEqualsDeclaration */:
+                result = reduceNodes(node.decorators, cbNodes, result);
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNode(node.moduleReference, cbNode, result);
+                break;
+            case 244 /* ImportDeclaration */:
+                result = reduceNodes(node.decorators, cbNodes, result);
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNode(node.importClause, cbNode, result);
+                result = reduceNode(node.moduleSpecifier, cbNode, result);
+                break;
+            case 245 /* ImportClause */:
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNode(node.namedBindings, cbNode, result);
+                break;
+            case 246 /* NamespaceImport */:
+                result = reduceNode(node.name, cbNode, result);
+                break;
+            case 247 /* NamedImports */:
+            case 251 /* NamedExports */:
+                result = reduceNodes(node.elements, cbNodes, result);
+                break;
+            case 248 /* ImportSpecifier */:
+            case 252 /* ExportSpecifier */:
+                result = reduceNode(node.propertyName, cbNode, result);
+                result = reduceNode(node.name, cbNode, result);
+                break;
+            case 249 /* ExportAssignment */:
+                result = ts.reduceLeft(node.decorators, cbNode, result);
+                result = ts.reduceLeft(node.modifiers, cbNode, result);
+                result = reduceNode(node.expression, cbNode, result);
+                break;
+            case 250 /* ExportDeclaration */:
+                result = ts.reduceLeft(node.decorators, cbNode, result);
+                result = ts.reduceLeft(node.modifiers, cbNode, result);
+                result = reduceNode(node.exportClause, cbNode, result);
+                result = reduceNode(node.moduleSpecifier, cbNode, result);
+                break;
+            // Module references
+            case 254 /* ExternalModuleReference */:
+                result = reduceNode(node.expression, cbNode, result);
+                break;
+            // JSX
+            case 255 /* JsxElement */:
+                result = reduceNode(node.openingElement, cbNode, result);
+                result = ts.reduceLeft(node.children, cbNode, result);
+                result = reduceNode(node.closingElement, cbNode, result);
+                break;
+            case 259 /* JsxFragment */:
+                result = reduceNode(node.openingFragment, cbNode, result);
+                result = ts.reduceLeft(node.children, cbNode, result);
+                result = reduceNode(node.closingFragment, cbNode, result);
+                break;
+            case 256 /* JsxSelfClosingElement */:
+            case 257 /* JsxOpeningElement */:
+                result = reduceNode(node.tagName, cbNode, result);
+                result = reduceNode(node.attributes, cbNode, result);
+                break;
+            case 263 /* JsxAttributes */:
+                result = reduceNodes(node.properties, cbNodes, result);
+                break;
+            case 258 /* JsxClosingElement */:
+                result = reduceNode(node.tagName, cbNode, result);
+                break;
+            case 262 /* JsxAttribute */:
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNode(node.initializer, cbNode, result);
+                break;
+            case 264 /* JsxSpreadAttribute */:
+                result = reduceNode(node.expression, cbNode, result);
+                break;
+            case 265 /* JsxExpression */:
+                result = reduceNode(node.expression, cbNode, result);
+                break;
+            // Clauses
+            case 266 /* CaseClause */:
+                result = reduceNode(node.expression, cbNode, result);
+            // falls through
+            case 267 /* DefaultClause */:
+                result = reduceNodes(node.statements, cbNodes, result);
+                break;
+            case 268 /* HeritageClause */:
+                result = reduceNodes(node.types, cbNodes, result);
+                break;
+            case 269 /* CatchClause */:
+                result = reduceNode(node.variableDeclaration, cbNode, result);
+                result = reduceNode(node.block, cbNode, result);
+                break;
+            // Property assignments
+            case 270 /* PropertyAssignment */:
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNode(node.initializer, cbNode, result);
+                break;
+            case 271 /* ShorthandPropertyAssignment */:
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNode(node.objectAssignmentInitializer, cbNode, result);
+                break;
+            case 272 /* SpreadAssignment */:
+                result = reduceNode(node.expression, cbNode, result);
+                break;
+            // Enum
+            case 273 /* EnumMember */:
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNode(node.initializer, cbNode, result);
+                break;
+            // Top-level nodes
+            case 274 /* SourceFile */:
+                result = reduceNodes(node.statements, cbNodes, result);
+                break;
+            // Transformation nodes
+            case 301 /* PartiallyEmittedExpression */:
+                result = reduceNode(node.expression, cbNode, result);
+                break;
+            case 302 /* CommaListExpression */:
+                result = reduceNodes(node.elements, cbNodes, result);
+                break;
+            default:
+                break;
+        }
+        return result;
+    }
+    ts.reduceEachChild = reduceEachChild;
+    function mergeLexicalEnvironment(statements, declarations) {
+        if (!ts.some(declarations)) {
+            return statements;
+        }
+        return ts.isNodeArray(statements)
+            ? ts.setTextRange(ts.createNodeArray(ts.prependStatements(statements.slice(), declarations)), statements)
+            : ts.prependStatements(statements, declarations);
+    }
+    ts.mergeLexicalEnvironment = mergeLexicalEnvironment;
+    /**
+     * Lifts a NodeArray containing only Statement nodes to a block.
+     *
+     * @param nodes The NodeArray.
+     */
+    function liftToBlock(nodes) {
+        Debug.assert(ts.every(nodes, ts.isStatement), "Cannot lift nodes to a Block.");
+        return ts.singleOrUndefined(nodes) || ts.createBlock(nodes);
+    }
+    ts.liftToBlock = liftToBlock;
+    /**
+     * Aggregates the TransformFlags for a Node and its subtree.
+     */
+    function aggregateTransformFlags(node) {
+        aggregateTransformFlagsForNode(node);
+        return node;
+    }
+    ts.aggregateTransformFlags = aggregateTransformFlags;
+    /**
+     * Aggregates the TransformFlags for a Node and its subtree. The flags for the subtree are
+     * computed first, then the transform flags for the current node are computed from the subtree
+     * flags and the state of the current node. Finally, the transform flags of the node are
+     * returned, excluding any flags that should not be included in its parent node's subtree
+     * flags.
+     */
+    function aggregateTransformFlagsForNode(node) {
+        if (node === undefined) {
+            return 0 /* None */;
+        }
+        if (node.transformFlags & 536870912 /* HasComputedFlags */) {
+            return node.transformFlags & ~ts.getTransformFlagsSubtreeExclusions(node.kind);
+        }
+        var subtreeFlags = aggregateTransformFlagsForSubtree(node);
+        return ts.computeTransformFlagsForNode(node, subtreeFlags);
+    }
+    function aggregateTransformFlagsForNodeArray(nodes) {
+        if (nodes === undefined) {
+            return 0 /* None */;
+        }
+        var subtreeFlags = 0 /* None */;
+        var nodeArrayFlags = 0 /* None */;
+        for (var _i = 0, nodes_3 = nodes; _i < nodes_3.length; _i++) {
+            var node = nodes_3[_i];
+            subtreeFlags |= aggregateTransformFlagsForNode(node);
+            nodeArrayFlags |= node.transformFlags & ~536870912 /* HasComputedFlags */;
+        }
+        nodes.transformFlags = nodeArrayFlags | 536870912 /* HasComputedFlags */;
+        return subtreeFlags;
+    }
+    /**
+     * Aggregates the transform flags for the subtree of a node.
+     */
+    function aggregateTransformFlagsForSubtree(node) {
+        // We do not transform ambient declarations or types, so there is no need to
+        // recursively aggregate transform flags.
+        if (ts.hasModifier(node, 2 /* Ambient */) || (ts.isTypeNode(node) && node.kind !== 207 /* ExpressionWithTypeArguments */)) {
+            return 0 /* None */;
+        }
+        // Aggregate the transform flags of each child.
+        return reduceEachChild(node, 0 /* None */, aggregateTransformFlagsForChildNode, aggregateTransformFlagsForChildNodes);
+    }
+    /**
+     * Aggregates the TransformFlags of a child node with the TransformFlags of its
+     * siblings.
+     */
+    function aggregateTransformFlagsForChildNode(transformFlags, node) {
+        return transformFlags | aggregateTransformFlagsForNode(node);
+    }
+    function aggregateTransformFlagsForChildNodes(transformFlags, nodes) {
+        return transformFlags | aggregateTransformFlagsForNodeArray(nodes);
+    }
+    var Debug;
+    (function (Debug) {
+        var isDebugInfoEnabled = false;
+        function failBadSyntaxKind(node, message) {
+            return Debug.fail((message || "Unexpected node.") + "\r\nNode " + ts.formatSyntaxKind(node.kind) + " was unexpected.", failBadSyntaxKind);
+        }
+        Debug.failBadSyntaxKind = failBadSyntaxKind;
+        Debug.assertEachNode = Debug.shouldAssert(1 /* Normal */)
+            ? function (nodes, test, message) { return Debug.assert(test === undefined || ts.every(nodes, test), message || "Unexpected node.", function () { return "Node array did not pass test '" + Debug.getFunctionName(test) + "'."; }, Debug.assertEachNode); }
+            : ts.noop;
+        Debug.assertNode = Debug.shouldAssert(1 /* Normal */)
+            ? function (node, test, message) { return Debug.assert(test === undefined || test(node), message || "Unexpected node.", function () { return "Node " + ts.formatSyntaxKind(node.kind) + " did not pass test '" + Debug.getFunctionName(test) + "'."; }, Debug.assertNode); }
+            : ts.noop;
+        Debug.assertOptionalNode = Debug.shouldAssert(1 /* Normal */)
+            ? function (node, test, message) { return Debug.assert(test === undefined || node === undefined || test(node), message || "Unexpected node.", function () { return "Node " + ts.formatSyntaxKind(node.kind) + " did not pass test '" + Debug.getFunctionName(test) + "'."; }, Debug.assertOptionalNode); }
+            : ts.noop;
+        Debug.assertOptionalToken = Debug.shouldAssert(1 /* Normal */)
+            ? function (node, kind, message) { return Debug.assert(kind === undefined || node === undefined || node.kind === kind, message || "Unexpected node.", function () { return "Node " + ts.formatSyntaxKind(node.kind) + " was not a '" + ts.formatSyntaxKind(kind) + "' token."; }, Debug.assertOptionalToken); }
+            : ts.noop;
+        Debug.assertMissingNode = Debug.shouldAssert(1 /* Normal */)
+            ? function (node, message) { return Debug.assert(node === undefined, message || "Unexpected node.", function () { return "Node " + ts.formatSyntaxKind(node.kind) + " was unexpected'."; }, Debug.assertMissingNode); }
+            : ts.noop;
+        /**
+         * Injects debug information into frequently used types.
+         */
+        function enableDebugInfo() {
+            if (isDebugInfoEnabled)
+                return;
+            // Add additional properties in debug mode to assist with debugging.
+            Object.defineProperties(ts.objectAllocator.getSymbolConstructor().prototype, {
+                __debugFlags: { get: function () { return ts.formatSymbolFlags(this.flags); } }
+            });
+            Object.defineProperties(ts.objectAllocator.getTypeConstructor().prototype, {
+                __debugFlags: { get: function () { return ts.formatTypeFlags(this.flags); } },
+                __debugObjectFlags: { get: function () { return this.flags & 131072 /* Object */ ? ts.formatObjectFlags(this.objectFlags) : ""; } },
+                __debugTypeToString: { value: function () { return this.checker.typeToString(this); } },
+            });
+            var nodeConstructors = [
+                ts.objectAllocator.getNodeConstructor(),
+                ts.objectAllocator.getIdentifierConstructor(),
+                ts.objectAllocator.getTokenConstructor(),
+                ts.objectAllocator.getSourceFileConstructor()
+            ];
+            for (var _i = 0, nodeConstructors_1 = nodeConstructors; _i < nodeConstructors_1.length; _i++) {
+                var ctor = nodeConstructors_1[_i];
+                if (!ctor.prototype.hasOwnProperty("__debugKind")) {
+                    Object.defineProperties(ctor.prototype, {
+                        __debugKind: { get: function () { return ts.formatSyntaxKind(this.kind); } },
+                        __debugModifierFlags: { get: function () { return ts.formatModifierFlags(ts.getModifierFlagsNoCache(this)); } },
+                        __debugTransformFlags: { get: function () { return ts.formatTransformFlags(this.transformFlags); } },
+                        __debugEmitFlags: { get: function () { return ts.formatEmitFlags(ts.getEmitFlags(this)); } },
+                        __debugGetText: {
+                            value: function (includeTrivia) {
+                                if (ts.nodeIsSynthesized(this))
+                                    return "";
+                                var parseNode = ts.getParseTreeNode(this);
+                                var sourceFile = parseNode && ts.getSourceFileOfNode(parseNode);
+                                return sourceFile ? ts.getSourceTextOfNodeFromSourceFile(sourceFile, parseNode, includeTrivia) : "";
+                            }
+                        }
+                    });
+                }
+            }
+            isDebugInfoEnabled = true;
+        }
+        Debug.enableDebugInfo = enableDebugInfo;
+    })(Debug = ts.Debug || (ts.Debug = {}));
+})(ts || (ts = {}));
+/* @internal */
+var ts;
+(function (ts) {
+    function getOriginalNodeId(node) {
+        node = ts.getOriginalNode(node);
+        return node ? ts.getNodeId(node) : 0;
+    }
+    ts.getOriginalNodeId = getOriginalNodeId;
+    function containsDefaultReference(node) {
+        if (!node)
+            return false;
+        if (!ts.isNamedImports(node))
+            return false;
+        return ts.some(node.elements, isNamedDefaultReference);
+    }
+    function isNamedDefaultReference(e) {
+        return e.propertyName !== undefined && e.propertyName.escapedText === "default" /* Default */;
+    }
+    function chainBundle(transformSourceFile) {
+        return transformSourceFileOrBundle;
+        function transformSourceFileOrBundle(node) {
+            return node.kind === 274 /* SourceFile */ ? transformSourceFile(node) : transformBundle(node);
+        }
+        function transformBundle(node) {
+            return ts.createBundle(ts.map(node.sourceFiles, transformSourceFile), node.prepends);
+        }
+    }
+    ts.chainBundle = chainBundle;
+    function getImportNeedsImportStarHelper(node) {
+        if (!!ts.getNamespaceDeclarationNode(node)) {
+            return true;
+        }
+        var bindings = node.importClause && node.importClause.namedBindings;
+        if (!bindings) {
+            return false;
+        }
+        if (!ts.isNamedImports(bindings))
+            return false;
+        var defaultRefCount = 0;
+        for (var _i = 0, _a = bindings.elements; _i < _a.length; _i++) {
+            var binding = _a[_i];
+            if (isNamedDefaultReference(binding)) {
+                defaultRefCount++;
+            }
+        }
+        // Import star is required if there's default named refs mixed with non-default refs, or if theres non-default refs and it has a default import
+        return (defaultRefCount > 0 && defaultRefCount !== bindings.elements.length) || (!!(bindings.elements.length - defaultRefCount) && ts.isDefaultImport(node));
+    }
+    ts.getImportNeedsImportStarHelper = getImportNeedsImportStarHelper;
+    function getImportNeedsImportDefaultHelper(node) {
+        // Import default is needed if there's a default import or a default ref and no other refs (meaning an import star helper wasn't requested)
+        return !getImportNeedsImportStarHelper(node) && (ts.isDefaultImport(node) || (!!node.importClause && ts.isNamedImports(node.importClause.namedBindings) && containsDefaultReference(node.importClause.namedBindings))); // TODO: GH#18217
+    }
+    ts.getImportNeedsImportDefaultHelper = getImportNeedsImportDefaultHelper;
+    function collectExternalModuleInfo(sourceFile, resolver, compilerOptions) {
+        var externalImports = [];
+        var exportSpecifiers = ts.createMultiMap();
+        var exportedBindings = [];
+        var uniqueExports = ts.createMap();
+        var exportedNames;
+        var hasExportDefault = false;
+        var exportEquals;
+        var hasExportStarsToExportValues = false;
+        var hasImportStarOrImportDefault = false;
+        for (var _i = 0, _a = sourceFile.statements; _i < _a.length; _i++) {
+            var node = _a[_i];
+            switch (node.kind) {
+                case 244 /* ImportDeclaration */:
+                    // import "mod"
+                    // import x from "mod"
+                    // import * as x from "mod"
+                    // import { x, y } from "mod"
+                    externalImports.push(node);
+                    hasImportStarOrImportDefault = hasImportStarOrImportDefault || getImportNeedsImportStarHelper(node) || getImportNeedsImportDefaultHelper(node);
+                    break;
+                case 243 /* ImportEqualsDeclaration */:
+                    if (node.moduleReference.kind === 254 /* ExternalModuleReference */) {
+                        // import x = require("mod")
+                        externalImports.push(node);
+                    }
+                    break;
+                case 250 /* ExportDeclaration */:
+                    if (node.moduleSpecifier) {
+                        if (!node.exportClause) {
+                            // export * from "mod"
+                            externalImports.push(node);
+                            hasExportStarsToExportValues = true;
+                        }
+                        else {
+                            // export { x, y } from "mod"
+                            externalImports.push(node);
+                        }
+                    }
+                    else {
+                        // export { x, y }
+                        for (var _b = 0, _c = node.exportClause.elements; _b < _c.length; _b++) {
+                            var specifier = _c[_b];
+                            if (!uniqueExports.get(ts.idText(specifier.name))) {
+                                var name = specifier.propertyName || specifier.name;
+                                exportSpecifiers.add(ts.idText(name), specifier);
+                                var decl = resolver.getReferencedImportDeclaration(name)
+                                    || resolver.getReferencedValueDeclaration(name);
+                                if (decl) {
+                                    multiMapSparseArrayAdd(exportedBindings, getOriginalNodeId(decl), specifier.name);
+                                }
+                                uniqueExports.set(ts.idText(specifier.name), true);
+                                exportedNames = ts.append(exportedNames, specifier.name);
+                            }
+                        }
+                    }
+                    break;
+                case 249 /* ExportAssignment */:
+                    if (node.isExportEquals && !exportEquals) {
+                        // export = x
+                        exportEquals = node;
+                    }
+                    break;
+                case 214 /* VariableStatement */:
+                    if (ts.hasModifier(node, 1 /* Export */)) {
+                        for (var _d = 0, _e = node.declarationList.declarations; _d < _e.length; _d++) {
+                            var decl = _e[_d];
+                            exportedNames = collectExportedVariableInfo(decl, uniqueExports, exportedNames);
+                        }
+                    }
+                    break;
+                case 234 /* FunctionDeclaration */:
+                    if (ts.hasModifier(node, 1 /* Export */)) {
+                        if (ts.hasModifier(node, 512 /* Default */)) {
+                            // export default function() { }
+                            if (!hasExportDefault) {
+                                multiMapSparseArrayAdd(exportedBindings, getOriginalNodeId(node), ts.getDeclarationName(node));
+                                hasExportDefault = true;
+                            }
+                        }
+                        else {
+                            // export function x() { }
+                            var name = node.name;
+                            if (!uniqueExports.get(ts.idText(name))) {
+                                multiMapSparseArrayAdd(exportedBindings, getOriginalNodeId(node), name);
+                                uniqueExports.set(ts.idText(name), true);
+                                exportedNames = ts.append(exportedNames, name);
+                            }
+                        }
+                    }
+                    break;
+                case 235 /* ClassDeclaration */:
+                    if (ts.hasModifier(node, 1 /* Export */)) {
+                        if (ts.hasModifier(node, 512 /* Default */)) {
+                            // export default class { }
+                            if (!hasExportDefault) {
+                                multiMapSparseArrayAdd(exportedBindings, getOriginalNodeId(node), ts.getDeclarationName(node));
+                                hasExportDefault = true;
+                            }
+                        }
+                        else {
+                            // export class x { }
+                            var name = node.name;
+                            if (name && !uniqueExports.get(ts.idText(name))) {
+                                multiMapSparseArrayAdd(exportedBindings, getOriginalNodeId(node), name);
+                                uniqueExports.set(ts.idText(name), true);
+                                exportedNames = ts.append(exportedNames, name);
+                            }
+                        }
+                    }
+                    break;
+            }
+        }
+        var externalHelpersModuleName = ts.getOrCreateExternalHelpersModuleNameIfNeeded(sourceFile, compilerOptions, hasExportStarsToExportValues, hasImportStarOrImportDefault);
+        var externalHelpersImportDeclaration = externalHelpersModuleName && ts.createImportDeclaration(
+        /*decorators*/ undefined, 
+        /*modifiers*/ undefined, ts.createImportClause(/*name*/ undefined, ts.createNamespaceImport(externalHelpersModuleName)), ts.createLiteral(ts.externalHelpersModuleNameText));
+        if (externalHelpersImportDeclaration) {
+            ts.addEmitFlags(externalHelpersImportDeclaration, 67108864 /* NeverApplyImportHelper */);
+            externalImports.unshift(externalHelpersImportDeclaration);
+        }
+        return { externalImports: externalImports, exportSpecifiers: exportSpecifiers, exportEquals: exportEquals, hasExportStarsToExportValues: hasExportStarsToExportValues, exportedBindings: exportedBindings, exportedNames: exportedNames, externalHelpersImportDeclaration: externalHelpersImportDeclaration };
+    }
+    ts.collectExternalModuleInfo = collectExternalModuleInfo;
+    function collectExportedVariableInfo(decl, uniqueExports, exportedNames) {
+        if (ts.isBindingPattern(decl.name)) {
+            for (var _i = 0, _a = decl.name.elements; _i < _a.length; _i++) {
+                var element = _a[_i];
+                if (!ts.isOmittedExpression(element)) {
+                    exportedNames = collectExportedVariableInfo(element, uniqueExports, exportedNames);
+                }
+            }
+        }
+        else if (!ts.isGeneratedIdentifier(decl.name)) {
+            var text = ts.idText(decl.name);
+            if (!uniqueExports.get(text)) {
+                uniqueExports.set(text, true);
+                exportedNames = ts.append(exportedNames, decl.name);
+            }
+        }
+        return exportedNames;
+    }
+    /** Use a sparse array as a multi-map. */
+    function multiMapSparseArrayAdd(map, key, value) {
+        var values = map[key];
+        if (values) {
+            values.push(value);
+        }
+        else {
+            map[key] = values = [value];
+        }
+        return values;
+    }
+    /**
+     * Used in the module transformer to check if an expression is reasonably without sideeffect,
+     *  and thus better to copy into multiple places rather than to cache in a temporary variable
+     *  - this is mostly subjective beyond the requirement that the expression not be sideeffecting
+     */
+    function isSimpleCopiableExpression(expression) {
+        return ts.isStringLiteralLike(expression) ||
+            expression.kind === 8 /* NumericLiteral */ ||
+            ts.isKeyword(expression.kind) ||
+            ts.isIdentifier(expression);
+    }
+    ts.isSimpleCopiableExpression = isSimpleCopiableExpression;
+    /**
+     * @param input Template string input strings
+     * @param args Names which need to be made file-level unique
+     */
+    function helperString(input) {
+        var args = [];
+        for (var _i = 1; _i < arguments.length; _i++) {
+            args[_i - 1] = arguments[_i];
+        }
+        return function (uniqueName) {
+            var result = "";
+            for (var i = 0; i < args.length; i++) {
+                result += input[i];
+                result += uniqueName(args[i]);
+            }
+            result += input[input.length - 1];
+            return result;
+        };
+    }
+    ts.helperString = helperString;
+})(ts || (ts = {}));
+/*@internal*/
+var ts;
+(function (ts) {
+    var FlattenLevel;
+    (function (FlattenLevel) {
+        FlattenLevel[FlattenLevel["All"] = 0] = "All";
+        FlattenLevel[FlattenLevel["ObjectRest"] = 1] = "ObjectRest";
+    })(FlattenLevel = ts.FlattenLevel || (ts.FlattenLevel = {}));
+    /**
+     * Flattens a DestructuringAssignment or a VariableDeclaration to an expression.
+     *
+     * @param node The node to flatten.
+     * @param visitor An optional visitor used to visit initializers.
+     * @param context The transformation context.
+     * @param level Indicates the extent to which flattening should occur.
+     * @param needsValue An optional value indicating whether the value from the right-hand-side of
+     * the destructuring assignment is needed as part of a larger expression.
+     * @param createAssignmentCallback An optional callback used to create the assignment expression.
+     */
+    function flattenDestructuringAssignment(node, visitor, context, level, needsValue, createAssignmentCallback) {
+        var location = node;
+        var value;
+        if (ts.isDestructuringAssignment(node)) {
+            value = node.right;
+            while (ts.isEmptyArrayLiteral(node.left) || ts.isEmptyObjectLiteral(node.left)) {
+                if (ts.isDestructuringAssignment(value)) {
+                    location = node = value;
+                    value = node.right;
+                }
+                else {
+                    return ts.visitNode(value, visitor, ts.isExpression);
+                }
+            }
+        }
+        var expressions;
+        var flattenContext = {
+            context: context,
+            level: level,
+            downlevelIteration: !!context.getCompilerOptions().downlevelIteration,
+            hoistTempVariables: true,
+            emitExpression: emitExpression,
+            emitBindingOrAssignment: emitBindingOrAssignment,
+            createArrayBindingOrAssignmentPattern: makeArrayAssignmentPattern,
+            createObjectBindingOrAssignmentPattern: makeObjectAssignmentPattern,
+            createArrayBindingOrAssignmentElement: makeAssignmentElement,
+            visitor: visitor
+        };
+        if (value) {
+            value = ts.visitNode(value, visitor, ts.isExpression);
+            if (ts.isIdentifier(value) && bindingOrAssignmentElementAssignsToName(node, value.escapedText)) {
+                // If the right-hand value of the assignment is also an assignment target then
+                // we need to cache the right-hand value.
+                value = ensureIdentifier(flattenContext, value, /*reuseIdentifierExpressions*/ false, location);
+            }
+            else if (needsValue) {
+                // If the right-hand value of the destructuring assignment needs to be preserved (as
+                // is the case when the destructuring assignment is part of a larger expression),
+                // then we need to cache the right-hand value.
+                //
+                // The source map location for the assignment should point to the entire binary
+                // expression.
+                value = ensureIdentifier(flattenContext, value, /*reuseIdentifierExpressions*/ true, location);
+            }
+            else if (ts.nodeIsSynthesized(node)) {
+                // Generally, the source map location for a destructuring assignment is the root
+                // expression.
+                //
+                // However, if the root expression is synthesized (as in the case
+                // of the initializer when transforming a ForOfStatement), then the source map
+                // location should point to the right-hand value of the expression.
+                location = value;
+            }
+        }
+        flattenBindingOrAssignmentElement(flattenContext, node, value, location, /*skipInitializer*/ ts.isDestructuringAssignment(node));
+        if (value && needsValue) {
+            if (!ts.some(expressions)) {
+                return value;
+            }
+            expressions.push(value);
+        }
+        return ts.aggregateTransformFlags(ts.inlineExpressions(expressions)) || ts.createOmittedExpression();
+        function emitExpression(expression) {
+            // NOTE: this completely disables source maps, but aligns with the behavior of
+            //       `emitAssignment` in the old emitter.
+            ts.setEmitFlags(expression, 64 /* NoNestedSourceMaps */);
+            ts.aggregateTransformFlags(expression);
+            expressions = ts.append(expressions, expression);
+        }
+        function emitBindingOrAssignment(target, value, location, original) {
+            ts.Debug.assertNode(target, createAssignmentCallback ? ts.isIdentifier : ts.isExpression);
+            var expression = createAssignmentCallback
+                ? createAssignmentCallback(target, value, location)
+                : ts.setTextRange(ts.createAssignment(ts.visitNode(target, visitor, ts.isExpression), value), location);
+            expression.original = original;
+            emitExpression(expression);
+        }
+    }
+    ts.flattenDestructuringAssignment = flattenDestructuringAssignment;
+    function bindingOrAssignmentElementAssignsToName(element, escapedName) {
+        var target = ts.getTargetOfBindingOrAssignmentElement(element); // TODO: GH#18217
+        if (ts.isBindingOrAssignmentPattern(target)) {
+            return bindingOrAssignmentPatternAssignsToName(target, escapedName);
+        }
+        else if (ts.isIdentifier(target)) {
+            return target.escapedText === escapedName;
+        }
+        return false;
+    }
+    function bindingOrAssignmentPatternAssignsToName(pattern, escapedName) {
+        var elements = ts.getElementsOfBindingOrAssignmentPattern(pattern);
+        for (var _i = 0, elements_3 = elements; _i < elements_3.length; _i++) {
+            var element = elements_3[_i];
+            if (bindingOrAssignmentElementAssignsToName(element, escapedName)) {
+                return true;
+            }
+        }
+        return false;
+    }
+    /**
+     * Flattens a VariableDeclaration or ParameterDeclaration to one or more variable declarations.
+     *
+     * @param node The node to flatten.
+     * @param visitor An optional visitor used to visit initializers.
+     * @param context The transformation context.
+     * @param boundValue The value bound to the declaration.
+     * @param skipInitializer A value indicating whether to ignore the initializer of `node`.
+     * @param hoistTempVariables Indicates whether temporary variables should not be recorded in-line.
+     * @param level Indicates the extent to which flattening should occur.
+     */
+    function flattenDestructuringBinding(node, visitor, context, level, rval, hoistTempVariables, skipInitializer) {
+        if (hoistTempVariables === void 0) { hoistTempVariables = false; }
+        var pendingExpressions;
+        var pendingDeclarations = [];
+        var declarations = [];
+        var flattenContext = {
+            context: context,
+            level: level,
+            downlevelIteration: !!context.getCompilerOptions().downlevelIteration,
+            hoistTempVariables: hoistTempVariables,
+            emitExpression: emitExpression,
+            emitBindingOrAssignment: emitBindingOrAssignment,
+            createArrayBindingOrAssignmentPattern: makeArrayBindingPattern,
+            createObjectBindingOrAssignmentPattern: makeObjectBindingPattern,
+            createArrayBindingOrAssignmentElement: makeBindingElement,
+            visitor: visitor
+        };
+        if (ts.isVariableDeclaration(node)) {
+            var initializer = ts.getInitializerOfBindingOrAssignmentElement(node);
+            if (initializer && ts.isIdentifier(initializer) && bindingOrAssignmentElementAssignsToName(node, initializer.escapedText)) {
+                // If the right-hand value of the assignment is also an assignment target then
+                // we need to cache the right-hand value.
+                initializer = ensureIdentifier(flattenContext, initializer, /*reuseIdentifierExpressions*/ false, initializer);
+                node = ts.updateVariableDeclaration(node, node.name, node.type, initializer);
+            }
+        }
+        flattenBindingOrAssignmentElement(flattenContext, node, rval, node, skipInitializer);
+        if (pendingExpressions) {
+            var temp = ts.createTempVariable(/*recordTempVariable*/ undefined);
+            if (hoistTempVariables) {
+                var value = ts.inlineExpressions(pendingExpressions);
+                pendingExpressions = undefined;
+                emitBindingOrAssignment(temp, value, /*location*/ undefined, /*original*/ undefined);
+            }
+            else {
+                context.hoistVariableDeclaration(temp);
+                var pendingDeclaration = ts.last(pendingDeclarations);
+                pendingDeclaration.pendingExpressions = ts.append(pendingDeclaration.pendingExpressions, ts.createAssignment(temp, pendingDeclaration.value));
+                ts.addRange(pendingDeclaration.pendingExpressions, pendingExpressions);
+                pendingDeclaration.value = temp;
+            }
+        }
+        for (var _i = 0, pendingDeclarations_1 = pendingDeclarations; _i < pendingDeclarations_1.length; _i++) {
+            var _a = pendingDeclarations_1[_i], pendingExpressions_1 = _a.pendingExpressions, name = _a.name, value = _a.value, location = _a.location, original = _a.original;
+            var variable = ts.createVariableDeclaration(name, 
+            /*type*/ undefined, pendingExpressions_1 ? ts.inlineExpressions(ts.append(pendingExpressions_1, value)) : value);
+            variable.original = original;
+            ts.setTextRange(variable, location);
+            if (ts.isIdentifier(name)) {
+                ts.setEmitFlags(variable, 64 /* NoNestedSourceMaps */);
+            }
+            ts.aggregateTransformFlags(variable);
+            declarations.push(variable);
+        }
+        return declarations;
+        function emitExpression(value) {
+            pendingExpressions = ts.append(pendingExpressions, value);
+        }
+        function emitBindingOrAssignment(target, value, location, original) {
+            ts.Debug.assertNode(target, ts.isBindingName);
+            if (pendingExpressions) {
+                value = ts.inlineExpressions(ts.append(pendingExpressions, value));
+                pendingExpressions = undefined;
+            }
+            pendingDeclarations.push({ pendingExpressions: pendingExpressions, name: target, value: value, location: location, original: original });
+        }
+    }
+    ts.flattenDestructuringBinding = flattenDestructuringBinding;
+    /**
+     * Flattens a BindingOrAssignmentElement into zero or more bindings or assignments.
+     *
+     * @param flattenContext Options used to control flattening.
+     * @param element The element to flatten.
+     * @param value The current RHS value to assign to the element.
+     * @param location The location to use for source maps and comments.
+     * @param skipInitializer An optional value indicating whether to include the initializer
+     * for the element.
+     */
+    function flattenBindingOrAssignmentElement(flattenContext, element, value, location, skipInitializer) {
+        if (!skipInitializer) {
+            var initializer = ts.visitNode(ts.getInitializerOfBindingOrAssignmentElement(element), flattenContext.visitor, ts.isExpression);
+            if (initializer) {
+                // Combine value and initializer
+                value = value ? createDefaultValueCheck(flattenContext, value, initializer, location) : initializer;
+            }
+            else if (!value) {
+                // Use 'void 0' in absence of value and initializer
+                value = ts.createVoidZero();
+            }
+        }
+        var bindingTarget = ts.getTargetOfBindingOrAssignmentElement(element); // TODO: GH#18217
+        if (ts.isObjectBindingOrAssignmentPattern(bindingTarget)) {
+            flattenObjectBindingOrAssignmentPattern(flattenContext, element, bindingTarget, value, location);
+        }
+        else if (ts.isArrayBindingOrAssignmentPattern(bindingTarget)) {
+            flattenArrayBindingOrAssignmentPattern(flattenContext, element, bindingTarget, value, location);
+        }
+        else {
+            flattenContext.emitBindingOrAssignment(bindingTarget, value, location, /*original*/ element); // TODO: GH#18217
+        }
+    }
+    /**
+     * Flattens an ObjectBindingOrAssignmentPattern into zero or more bindings or assignments.
+     *
+     * @param flattenContext Options used to control flattening.
+     * @param parent The parent element of the pattern.
+     * @param pattern The ObjectBindingOrAssignmentPattern to flatten.
+     * @param value The current RHS value to assign to the element.
+     * @param location The location to use for source maps and comments.
+     */
+    function flattenObjectBindingOrAssignmentPattern(flattenContext, parent, pattern, value, location) {
+        var elements = ts.getElementsOfBindingOrAssignmentPattern(pattern);
+        var numElements = elements.length;
+        if (numElements !== 1) {
+            // For anything other than a single-element destructuring we need to generate a temporary
+            // to ensure value is evaluated exactly once. Additionally, if we have zero elements
+            // we need to emit *something* to ensure that in case a 'var' keyword was already emitted,
+            // so in that case, we'll intentionally create that temporary.
+            var reuseIdentifierExpressions = !ts.isDeclarationBindingElement(parent) || numElements !== 0;
+            value = ensureIdentifier(flattenContext, value, reuseIdentifierExpressions, location);
+        }
+        var bindingElements;
+        var computedTempVariables;
+        for (var i = 0; i < numElements; i++) {
+            var element = elements[i];
+            if (!ts.getRestIndicatorOfBindingOrAssignmentElement(element)) {
+                var propertyName = ts.getPropertyNameOfBindingOrAssignmentElement(element);
+                if (flattenContext.level >= 1 /* ObjectRest */
+                    && !(element.transformFlags & (524288 /* ContainsRest */ | 1048576 /* ContainsObjectRest */))
+                    && !(ts.getTargetOfBindingOrAssignmentElement(element).transformFlags & (524288 /* ContainsRest */ | 1048576 /* ContainsObjectRest */))
+                    && !ts.isComputedPropertyName(propertyName)) {
+                    bindingElements = ts.append(bindingElements, element);
+                }
+                else {
+                    if (bindingElements) {
+                        flattenContext.emitBindingOrAssignment(flattenContext.createObjectBindingOrAssignmentPattern(bindingElements), value, location, pattern);
+                        bindingElements = undefined;
+                    }
+                    var rhsValue = createDestructuringPropertyAccess(flattenContext, value, propertyName);
+                    if (ts.isComputedPropertyName(propertyName)) {
+                        computedTempVariables = ts.append(computedTempVariables, rhsValue.argumentExpression);
+                    }
+                    flattenBindingOrAssignmentElement(flattenContext, element, rhsValue, /*location*/ element);
+                }
+            }
+            else if (i === numElements - 1) {
+                if (bindingElements) {
+                    flattenContext.emitBindingOrAssignment(flattenContext.createObjectBindingOrAssignmentPattern(bindingElements), value, location, pattern);
+                    bindingElements = undefined;
+                }
+                var rhsValue = createRestCall(flattenContext.context, value, elements, computedTempVariables, pattern); // TODO: GH#18217
+                flattenBindingOrAssignmentElement(flattenContext, element, rhsValue, element);
+            }
+        }
+        if (bindingElements) {
+            flattenContext.emitBindingOrAssignment(flattenContext.createObjectBindingOrAssignmentPattern(bindingElements), value, location, pattern);
+        }
+    }
+    /**
+     * Flattens an ArrayBindingOrAssignmentPattern into zero or more bindings or assignments.
+     *
+     * @param flattenContext Options used to control flattening.
+     * @param parent The parent element of the pattern.
+     * @param pattern The ArrayBindingOrAssignmentPattern to flatten.
+     * @param value The current RHS value to assign to the element.
+     * @param location The location to use for source maps and comments.
+     */
+    function flattenArrayBindingOrAssignmentPattern(flattenContext, parent, pattern, value, location) {
+        var elements = ts.getElementsOfBindingOrAssignmentPattern(pattern);
+        var numElements = elements.length;
+        if (flattenContext.level < 1 /* ObjectRest */ && flattenContext.downlevelIteration) {
+            // Read the elements of the iterable into an array
+            value = ensureIdentifier(flattenContext, ts.createReadHelper(flattenContext.context, value, numElements > 0 && ts.getRestIndicatorOfBindingOrAssignmentElement(elements[numElements - 1])
+                ? undefined
+                : numElements, location), 
+            /*reuseIdentifierExpressions*/ false, location);
+        }
+        else if (numElements !== 1 && (flattenContext.level < 1 /* ObjectRest */ || numElements === 0)
+            || ts.every(elements, ts.isOmittedExpression)) {
+            // For anything other than a single-element destructuring we need to generate a temporary
+            // to ensure value is evaluated exactly once. Additionally, if we have zero elements
+            // we need to emit *something* to ensure that in case a 'var' keyword was already emitted,
+            // so in that case, we'll intentionally create that temporary.
+            // Or all the elements of the binding pattern are omitted expression such as "var [,] = [1,2]",
+            // then we will create temporary variable.
+            var reuseIdentifierExpressions = !ts.isDeclarationBindingElement(parent) || numElements !== 0;
+            value = ensureIdentifier(flattenContext, value, reuseIdentifierExpressions, location);
+        }
+        var bindingElements;
+        var restContainingElements;
+        for (var i = 0; i < numElements; i++) {
+            var element = elements[i];
+            if (flattenContext.level >= 1 /* ObjectRest */) {
+                // If an array pattern contains an ObjectRest, we must cache the result so that we
+                // can perform the ObjectRest destructuring in a different declaration
+                if (element.transformFlags & 1048576 /* ContainsObjectRest */) {
+                    var temp = ts.createTempVariable(/*recordTempVariable*/ undefined);
+                    if (flattenContext.hoistTempVariables) {
+                        flattenContext.context.hoistVariableDeclaration(temp);
+                    }
+                    restContainingElements = ts.append(restContainingElements, [temp, element]);
+                    bindingElements = ts.append(bindingElements, flattenContext.createArrayBindingOrAssignmentElement(temp));
+                }
+                else {
+                    bindingElements = ts.append(bindingElements, element);
+                }
+            }
+            else if (ts.isOmittedExpression(element)) {
+                continue;
+            }
+            else if (!ts.getRestIndicatorOfBindingOrAssignmentElement(element)) {
+                var rhsValue = ts.createElementAccess(value, i);
+                flattenBindingOrAssignmentElement(flattenContext, element, rhsValue, /*location*/ element);
+            }
+            else if (i === numElements - 1) {
+                var rhsValue = ts.createArraySlice(value, i);
+                flattenBindingOrAssignmentElement(flattenContext, element, rhsValue, /*location*/ element);
+            }
+        }
+        if (bindingElements) {
+            flattenContext.emitBindingOrAssignment(flattenContext.createArrayBindingOrAssignmentPattern(bindingElements), value, location, pattern);
+        }
+        if (restContainingElements) {
+            for (var _i = 0, restContainingElements_1 = restContainingElements; _i < restContainingElements_1.length; _i++) {
+                var _a = restContainingElements_1[_i], id = _a[0], element = _a[1];
+                flattenBindingOrAssignmentElement(flattenContext, element, id, element);
+            }
+        }
+    }
+    /**
+     * Creates an expression used to provide a default value if a value is `undefined` at runtime.
+     *
+     * @param flattenContext Options used to control flattening.
+     * @param value The RHS value to test.
+     * @param defaultValue The default value to use if `value` is `undefined` at runtime.
+     * @param location The location to use for source maps and comments.
+     */
+    function createDefaultValueCheck(flattenContext, value, defaultValue, location) {
+        value = ensureIdentifier(flattenContext, value, /*reuseIdentifierExpressions*/ true, location);
+        return ts.createConditional(ts.createTypeCheck(value, "undefined"), defaultValue, value);
+    }
+    /**
+     * Creates either a PropertyAccessExpression or an ElementAccessExpression for the
+     * right-hand side of a transformed destructuring assignment.
+     *
+     * @link https://tc39.github.io/ecma262/#sec-runtime-semantics-keyeddestructuringassignmentevaluation
+     *
+     * @param flattenContext Options used to control flattening.
+     * @param value The RHS value that is the source of the property.
+     * @param propertyName The destructuring property name.
+     */
+    function createDestructuringPropertyAccess(flattenContext, value, propertyName) {
+        if (ts.isComputedPropertyName(propertyName)) {
+            var argumentExpression = ensureIdentifier(flattenContext, ts.visitNode(propertyName.expression, flattenContext.visitor), /*reuseIdentifierExpressions*/ false, /*location*/ propertyName);
+            return ts.createElementAccess(value, argumentExpression);
+        }
+        else if (ts.isStringOrNumericLiteral(propertyName)) {
+            var argumentExpression = ts.getSynthesizedClone(propertyName);
+            argumentExpression.text = argumentExpression.text;
+            return ts.createElementAccess(value, argumentExpression);
+        }
+        else {
+            var name = ts.createIdentifier(ts.idText(propertyName));
+            return ts.createPropertyAccess(value, name);
+        }
+    }
+    /**
+     * Ensures that there exists a declared identifier whose value holds the given expression.
+     * This function is useful to ensure that the expression's value can be read from in subsequent expressions.
+     * Unless 'reuseIdentifierExpressions' is false, 'value' will be returned if it is just an identifier.
+     *
+     * @param flattenContext Options used to control flattening.
+     * @param value the expression whose value needs to be bound.
+     * @param reuseIdentifierExpressions true if identifier expressions can simply be returned;
+     * false if it is necessary to always emit an identifier.
+     * @param location The location to use for source maps and comments.
+     */
+    function ensureIdentifier(flattenContext, value, reuseIdentifierExpressions, location) {
+        if (ts.isIdentifier(value) && reuseIdentifierExpressions) {
+            return value;
+        }
+        else {
+            var temp = ts.createTempVariable(/*recordTempVariable*/ undefined);
+            if (flattenContext.hoistTempVariables) {
+                flattenContext.context.hoistVariableDeclaration(temp);
+                flattenContext.emitExpression(ts.setTextRange(ts.createAssignment(temp, value), location));
+            }
+            else {
+                flattenContext.emitBindingOrAssignment(temp, value, location, /*original*/ undefined);
+            }
+            return temp;
+        }
+    }
+    function makeArrayBindingPattern(elements) {
+        ts.Debug.assertEachNode(elements, ts.isArrayBindingElement);
+        return ts.createArrayBindingPattern(elements);
+    }
+    function makeArrayAssignmentPattern(elements) {
+        return ts.createArrayLiteral(ts.map(elements, ts.convertToArrayAssignmentElement));
+    }
+    function makeObjectBindingPattern(elements) {
+        ts.Debug.assertEachNode(elements, ts.isBindingElement);
+        return ts.createObjectBindingPattern(elements);
+    }
+    function makeObjectAssignmentPattern(elements) {
+        return ts.createObjectLiteral(ts.map(elements, ts.convertToObjectAssignmentElement));
+    }
+    function makeBindingElement(name) {
+        return ts.createBindingElement(/*dotDotDotToken*/ undefined, /*propertyName*/ undefined, name);
+    }
+    function makeAssignmentElement(name) {
+        return name;
+    }
+    var restHelper = {
+        name: "typescript:rest",
+        scoped: false,
+        text: "\n            var __rest = (this && this.__rest) || function (s, e) {\n                var t = {};\n                for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)\n                    t[p] = s[p];\n                if (s != null && typeof Object.getOwnPropertySymbols === \"function\")\n                    for (var i = 0, p = Object.getOwnPropertySymbols(s); i < p.length; i++) if (e.indexOf(p[i]) < 0)\n                        t[p[i]] = s[p[i]];\n                return t;\n            };"
+    };
+    /** Given value: o, propName: p, pattern: { a, b, ...p } from the original statement
+     * `{ a, b, ...p } = o`, create `p = __rest(o, ["a", "b"]);`
+     */
+    function createRestCall(context, value, elements, computedTempVariables, location) {
+        context.requestEmitHelper(restHelper);
+        var propertyNames = [];
+        var computedTempVariableOffset = 0;
+        for (var i = 0; i < elements.length - 1; i++) {
+            var propertyName = ts.getPropertyNameOfBindingOrAssignmentElement(elements[i]);
+            if (propertyName) {
+                if (ts.isComputedPropertyName(propertyName)) {
+                    var temp = computedTempVariables[computedTempVariableOffset];
+                    computedTempVariableOffset++;
+                    // typeof _tmp === "symbol" ? _tmp : _tmp + ""
+                    propertyNames.push(ts.createConditional(ts.createTypeCheck(temp, "symbol"), temp, ts.createAdd(temp, ts.createLiteral(""))));
+                }
+                else {
+                    propertyNames.push(ts.createLiteral(propertyName));
+                }
+            }
+        }
+        return ts.createCall(ts.getHelperName("__rest"), 
+        /*typeArguments*/ undefined, [
+            value,
+            ts.setTextRange(ts.createArrayLiteral(propertyNames), location)
+        ]);
+    }
+})(ts || (ts = {}));
+/*@internal*/
+var ts;
+(function (ts) {
+    /**
+     * Indicates whether to emit type metadata in the new format.
+     */
+    var USE_NEW_TYPE_METADATA_FORMAT = false;
+    var TypeScriptSubstitutionFlags;
+    (function (TypeScriptSubstitutionFlags) {
+        /** Enables substitutions for decorated classes. */
+        TypeScriptSubstitutionFlags[TypeScriptSubstitutionFlags["ClassAliases"] = 1] = "ClassAliases";
+        /** Enables substitutions for namespace exports. */
+        TypeScriptSubstitutionFlags[TypeScriptSubstitutionFlags["NamespaceExports"] = 2] = "NamespaceExports";
+        /* Enables substitutions for unqualified enum members */
+        TypeScriptSubstitutionFlags[TypeScriptSubstitutionFlags["NonQualifiedEnumMembers"] = 8] = "NonQualifiedEnumMembers";
+    })(TypeScriptSubstitutionFlags || (TypeScriptSubstitutionFlags = {}));
+    var ClassFacts;
+    (function (ClassFacts) {
+        ClassFacts[ClassFacts["None"] = 0] = "None";
+        ClassFacts[ClassFacts["HasStaticInitializedProperties"] = 1] = "HasStaticInitializedProperties";
+        ClassFacts[ClassFacts["HasConstructorDecorators"] = 2] = "HasConstructorDecorators";
+        ClassFacts[ClassFacts["HasMemberDecorators"] = 4] = "HasMemberDecorators";
+        ClassFacts[ClassFacts["IsExportOfNamespace"] = 8] = "IsExportOfNamespace";
+        ClassFacts[ClassFacts["IsNamedExternalExport"] = 16] = "IsNamedExternalExport";
+        ClassFacts[ClassFacts["IsDefaultExternalExport"] = 32] = "IsDefaultExternalExport";
+        ClassFacts[ClassFacts["IsDerivedClass"] = 64] = "IsDerivedClass";
+        ClassFacts[ClassFacts["UseImmediatelyInvokedFunctionExpression"] = 128] = "UseImmediatelyInvokedFunctionExpression";
+        ClassFacts[ClassFacts["HasAnyDecorators"] = 6] = "HasAnyDecorators";
+        ClassFacts[ClassFacts["NeedsName"] = 5] = "NeedsName";
+        ClassFacts[ClassFacts["MayNeedImmediatelyInvokedFunctionExpression"] = 7] = "MayNeedImmediatelyInvokedFunctionExpression";
+        ClassFacts[ClassFacts["IsExported"] = 56] = "IsExported";
+    })(ClassFacts || (ClassFacts = {}));
+    function transformTypeScript(context) {
+        var startLexicalEnvironment = context.startLexicalEnvironment, resumeLexicalEnvironment = context.resumeLexicalEnvironment, endLexicalEnvironment = context.endLexicalEnvironment, hoistVariableDeclaration = context.hoistVariableDeclaration;
+        var resolver = context.getEmitResolver();
+        var compilerOptions = context.getCompilerOptions();
+        var strictNullChecks = ts.getStrictOptionValue(compilerOptions, "strictNullChecks");
+        var languageVersion = ts.getEmitScriptTarget(compilerOptions);
+        var moduleKind = ts.getEmitModuleKind(compilerOptions);
+        // Save the previous transformation hooks.
+        var previousOnEmitNode = context.onEmitNode;
+        var previousOnSubstituteNode = context.onSubstituteNode;
+        // Set new transformation hooks.
+        context.onEmitNode = onEmitNode;
+        context.onSubstituteNode = onSubstituteNode;
+        // Enable substitution for property/element access to emit const enum values.
+        context.enableSubstitution(185 /* PropertyAccessExpression */);
+        context.enableSubstitution(186 /* ElementAccessExpression */);
+        // These variables contain state that changes as we descend into the tree.
+        var currentSourceFile;
+        var currentNamespace;
+        var currentNamespaceContainerName;
+        var currentScope;
+        var currentScopeFirstDeclarationsOfName;
+        /**
+         * Keeps track of whether expression substitution has been enabled for specific edge cases.
+         * They are persisted between each SourceFile transformation and should not be reset.
+         */
+        var enabledSubstitutions;
+        /**
+         * A map that keeps track of aliases created for classes with decorators to avoid issues
+         * with the double-binding behavior of classes.
+         */
+        var classAliases;
+        /**
+         * Keeps track of whether we are within any containing namespaces when performing
+         * just-in-time substitution while printing an expression identifier.
+         */
+        var applicableSubstitutions;
+        /**
+         * Tracks what computed name expressions originating from elided names must be inlined
+         * at the next execution site, in document order
+         */
+        var pendingExpressions;
+        return transformSourceFileOrBundle;
+        function transformSourceFileOrBundle(node) {
+            if (node.kind === 275 /* Bundle */) {
+                return transformBundle(node);
+            }
+            return transformSourceFile(node);
+        }
+        function transformBundle(node) {
+            return ts.createBundle(node.sourceFiles.map(transformSourceFile), ts.mapDefined(node.prepends, function (prepend) {
+                if (prepend.kind === 277 /* InputFiles */) {
+                    return ts.createUnparsedSourceFile(prepend.javascriptText, prepend.javascriptMapText);
+                }
+                return prepend;
+            }));
+        }
+        /**
+         * Transform TypeScript-specific syntax in a SourceFile.
+         *
+         * @param node A SourceFile node.
+         */
+        function transformSourceFile(node) {
+            if (node.isDeclarationFile) {
+                return node;
+            }
+            currentSourceFile = node;
+            var visited = saveStateAndInvoke(node, visitSourceFile);
+            ts.addEmitHelpers(visited, context.readEmitHelpers());
+            currentSourceFile = undefined;
+            return visited;
+        }
+        /**
+         * Visits a node, saving and restoring state variables on the stack.
+         *
+         * @param node The node to visit.
+         */
+        function saveStateAndInvoke(node, f) {
+            // Save state
+            var savedCurrentScope = currentScope;
+            var savedCurrentScopeFirstDeclarationsOfName = currentScopeFirstDeclarationsOfName;
+            // Handle state changes before visiting a node.
+            onBeforeVisitNode(node);
+            var visited = f(node);
+            // Restore state
+            if (currentScope !== savedCurrentScope) {
+                currentScopeFirstDeclarationsOfName = savedCurrentScopeFirstDeclarationsOfName;
+            }
+            currentScope = savedCurrentScope;
+            return visited;
+        }
+        /**
+         * Performs actions that should always occur immediately before visiting a node.
+         *
+         * @param node The node to visit.
+         */
+        function onBeforeVisitNode(node) {
+            switch (node.kind) {
+                case 274 /* SourceFile */:
+                case 241 /* CaseBlock */:
+                case 240 /* ModuleBlock */:
+                case 213 /* Block */:
+                    currentScope = node;
+                    currentScopeFirstDeclarationsOfName = undefined;
+                    break;
+                case 235 /* ClassDeclaration */:
+                case 234 /* FunctionDeclaration */:
+                    if (ts.hasModifier(node, 2 /* Ambient */)) {
+                        break;
+                    }
+                    // Record these declarations provided that they have a name.
+                    if (node.name) {
+                        recordEmittedDeclarationInScope(node);
+                    }
+                    else {
+                        // These nodes should always have names unless they are default-exports;
+                        // however, class declaration parsing allows for undefined names, so syntactically invalid
+                        // programs may also have an undefined name.
+                        ts.Debug.assert(node.kind === 235 /* ClassDeclaration */ || ts.hasModifier(node, 512 /* Default */));
+                    }
+                    break;
+            }
+        }
+        /**
+         * General-purpose node visitor.
+         *
+         * @param node The node to visit.
+         */
+        function visitor(node) {
+            return saveStateAndInvoke(node, visitorWorker);
+        }
+        /**
+         * Visits and possibly transforms any node.
+         *
+         * @param node The node to visit.
+         */
+        function visitorWorker(node) {
+            if (node.transformFlags & 1 /* TypeScript */) {
+                // This node is explicitly marked as TypeScript, so we should transform the node.
+                return visitTypeScript(node);
+            }
+            else if (node.transformFlags & 2 /* ContainsTypeScript */) {
+                // This node contains TypeScript, so we should visit its children.
+                return ts.visitEachChild(node, visitor, context);
+            }
+            return node;
+        }
+        /**
+         * Specialized visitor that visits the immediate children of a SourceFile.
+         *
+         * @param node The node to visit.
+         */
+        function sourceElementVisitor(node) {
+            return saveStateAndInvoke(node, sourceElementVisitorWorker);
+        }
+        /**
+         * Specialized visitor that visits the immediate children of a SourceFile.
+         *
+         * @param node The node to visit.
+         */
+        function sourceElementVisitorWorker(node) {
+            switch (node.kind) {
+                case 244 /* ImportDeclaration */:
+                case 243 /* ImportEqualsDeclaration */:
+                case 249 /* ExportAssignment */:
+                case 250 /* ExportDeclaration */:
+                    return visitEllidableStatement(node);
+                default:
+                    return visitorWorker(node);
+            }
+        }
+        function visitEllidableStatement(node) {
+            var parsed = ts.getParseTreeNode(node);
+            if (parsed !== node) {
+                // If the node has been transformed by a `before` transformer, perform no ellision on it
+                // As the type information we would attempt to lookup to perform ellision is potentially unavailable for the synthesized nodes
+                // We do not reuse `visitorWorker`, as the ellidable statement syntax kinds are technically unrecognized by the switch-case in `visitTypeScript`,
+                // and will trigger debug failures when debug verbosity is turned up
+                if (node.transformFlags & 2 /* ContainsTypeScript */) {
+                    // This node contains TypeScript, so we should visit its children.
+                    return ts.visitEachChild(node, visitor, context);
+                }
+                // Otherwise, we can just return the node
+                return node;
+            }
+            switch (node.kind) {
+                case 244 /* ImportDeclaration */:
+                    return visitImportDeclaration(node);
+                case 243 /* ImportEqualsDeclaration */:
+                    return visitImportEqualsDeclaration(node);
+                case 249 /* ExportAssignment */:
+                    return visitExportAssignment(node);
+                case 250 /* ExportDeclaration */:
+                    return visitExportDeclaration(node);
+                default:
+                    ts.Debug.fail("Unhandled ellided statement");
+            }
+        }
+        /**
+         * Specialized visitor that visits the immediate children of a namespace.
+         *
+         * @param node The node to visit.
+         */
+        function namespaceElementVisitor(node) {
+            return saveStateAndInvoke(node, namespaceElementVisitorWorker);
+        }
+        /**
+         * Specialized visitor that visits the immediate children of a namespace.
+         *
+         * @param node The node to visit.
+         */
+        function namespaceElementVisitorWorker(node) {
+            if (node.kind === 250 /* ExportDeclaration */ ||
+                node.kind === 244 /* ImportDeclaration */ ||
+                node.kind === 245 /* ImportClause */ ||
+                (node.kind === 243 /* ImportEqualsDeclaration */ &&
+                    node.moduleReference.kind === 254 /* ExternalModuleReference */)) {
+                // do not emit ES6 imports and exports since they are illegal inside a namespace
+                return undefined;
+            }
+            else if (node.transformFlags & 1 /* TypeScript */ || ts.hasModifier(node, 1 /* Export */)) {
+                // This node is explicitly marked as TypeScript, or is exported at the namespace
+                // level, so we should transform the node.
+                return visitTypeScript(node);
+            }
+            else if (node.transformFlags & 2 /* ContainsTypeScript */) {
+                // This node contains TypeScript, so we should visit its children.
+                return ts.visitEachChild(node, visitor, context);
+            }
+            return node;
+        }
+        /**
+         * Specialized visitor that visits the immediate children of a class with TypeScript syntax.
+         *
+         * @param node The node to visit.
+         */
+        function classElementVisitor(node) {
+            return saveStateAndInvoke(node, classElementVisitorWorker);
+        }
+        /**
+         * Specialized visitor that visits the immediate children of a class with TypeScript syntax.
+         *
+         * @param node The node to visit.
+         */
+        function classElementVisitorWorker(node) {
+            switch (node.kind) {
+                case 155 /* Constructor */:
+                    // TypeScript constructors are transformed in `visitClassDeclaration`.
+                    // We elide them here as `visitorWorker` checks transform flags, which could
+                    // erronously include an ES6 constructor without TypeScript syntax.
+                    return undefined;
+                case 152 /* PropertyDeclaration */:
+                case 160 /* IndexSignature */:
+                case 156 /* GetAccessor */:
+                case 157 /* SetAccessor */:
+                case 154 /* MethodDeclaration */:
+                    // Fallback to the default visit behavior.
+                    return visitorWorker(node);
+                case 212 /* SemicolonClassElement */:
+                    return node;
+                default:
+                    return ts.Debug.failBadSyntaxKind(node);
+            }
+        }
+        function modifierVisitor(node) {
+            if (ts.modifierToFlag(node.kind) & 2270 /* TypeScriptModifier */) {
+                return undefined;
+            }
+            else if (currentNamespace && node.kind === 84 /* ExportKeyword */) {
+                return undefined;
+            }
+            return node;
+        }
+        /**
+         * Branching visitor, visits a TypeScript syntax node.
+         *
+         * @param node The node to visit.
+         */
+        function visitTypeScript(node) {
+            if (ts.hasModifier(node, 2 /* Ambient */) && ts.isStatement(node)) {
+                // TypeScript ambient declarations are elided, but some comments may be preserved.
+                // See the implementation of `getLeadingComments` in comments.ts for more details.
+                return ts.createNotEmittedStatement(node);
+            }
+            switch (node.kind) {
+                case 84 /* ExportKeyword */:
+                case 79 /* DefaultKeyword */:
+                    // ES6 export and default modifiers are elided when inside a namespace.
+                    return currentNamespace ? undefined : node;
+                case 114 /* PublicKeyword */:
+                case 112 /* PrivateKeyword */:
+                case 113 /* ProtectedKeyword */:
+                case 117 /* AbstractKeyword */:
+                case 76 /* ConstKeyword */:
+                case 124 /* DeclareKeyword */:
+                case 132 /* ReadonlyKeyword */:
+                // TypeScript accessibility and readonly modifiers are elided.
+                case 167 /* ArrayType */:
+                case 168 /* TupleType */:
+                case 166 /* TypeLiteral */:
+                case 161 /* TypePredicate */:
+                case 148 /* TypeParameter */:
+                case 119 /* AnyKeyword */:
+                case 142 /* UnknownKeyword */:
+                case 122 /* BooleanKeyword */:
+                case 137 /* StringKeyword */:
+                case 134 /* NumberKeyword */:
+                case 131 /* NeverKeyword */:
+                case 105 /* VoidKeyword */:
+                case 138 /* SymbolKeyword */:
+                case 164 /* ConstructorType */:
+                case 163 /* FunctionType */:
+                case 165 /* TypeQuery */:
+                case 162 /* TypeReference */:
+                case 169 /* UnionType */:
+                case 170 /* IntersectionType */:
+                case 171 /* ConditionalType */:
+                case 173 /* ParenthesizedType */:
+                case 174 /* ThisType */:
+                case 175 /* TypeOperator */:
+                case 176 /* IndexedAccessType */:
+                case 177 /* MappedType */:
+                case 178 /* LiteralType */:
+                // TypeScript type nodes are elided.
+                case 160 /* IndexSignature */:
+                // TypeScript index signatures are elided.
+                case 150 /* Decorator */:
+                // TypeScript decorators are elided. They will be emitted as part of visitClassDeclaration.
+                case 237 /* TypeAliasDeclaration */:
+                    // TypeScript type-only declarations are elided.
+                    return undefined;
+                case 152 /* PropertyDeclaration */:
+                    // TypeScript property declarations are elided. However their names are still visited, and can potentially be retained if they could have sideeffects
+                    return visitPropertyDeclaration(node);
+                case 242 /* NamespaceExportDeclaration */:
+                    // TypeScript namespace export declarations are elided.
+                    return undefined;
+                case 155 /* Constructor */:
+                    return visitConstructor(node);
+                case 236 /* InterfaceDeclaration */:
+                    // TypeScript interfaces are elided, but some comments may be preserved.
+                    // See the implementation of `getLeadingComments` in comments.ts for more details.
+                    return ts.createNotEmittedStatement(node);
+                case 235 /* ClassDeclaration */:
+                    // This is a class declaration with TypeScript syntax extensions.
+                    //
+                    // TypeScript class syntax extensions include:
+                    // - decorators
+                    // - optional `implements` heritage clause
+                    // - parameter property assignments in the constructor
+                    // - property declarations
+                    // - index signatures
+                    // - method overload signatures
+                    return visitClassDeclaration(node);
+                case 205 /* ClassExpression */:
+                    // This is a class expression with TypeScript syntax extensions.
+                    //
+                    // TypeScript class syntax extensions include:
+                    // - decorators
+                    // - optional `implements` heritage clause
+                    // - parameter property assignments in the constructor
+                    // - property declarations
+                    // - index signatures
+                    // - method overload signatures
+                    return visitClassExpression(node);
+                case 268 /* HeritageClause */:
+                    // This is a heritage clause with TypeScript syntax extensions.
+                    //
+                    // TypeScript heritage clause extensions include:
+                    // - `implements` clause
+                    return visitHeritageClause(node);
+                case 207 /* ExpressionWithTypeArguments */:
+                    // TypeScript supports type arguments on an expression in an `extends` heritage clause.
+                    return visitExpressionWithTypeArguments(node);
+                case 154 /* MethodDeclaration */:
+                    // TypeScript method declarations may have decorators, modifiers
+                    // or type annotations.
+                    return visitMethodDeclaration(node);
+                case 156 /* GetAccessor */:
+                    // Get Accessors can have TypeScript modifiers, decorators, and type annotations.
+                    return visitGetAccessor(node);
+                case 157 /* SetAccessor */:
+                    // Set Accessors can have TypeScript modifiers and type annotations.
+                    return visitSetAccessor(node);
+                case 234 /* FunctionDeclaration */:
+                    // Typescript function declarations can have modifiers, decorators, and type annotations.
+                    return visitFunctionDeclaration(node);
+                case 192 /* FunctionExpression */:
+                    // TypeScript function expressions can have modifiers and type annotations.
+                    return visitFunctionExpression(node);
+                case 193 /* ArrowFunction */:
+                    // TypeScript arrow functions can have modifiers and type annotations.
+                    return visitArrowFunction(node);
+                case 149 /* Parameter */:
+                    // This is a parameter declaration with TypeScript syntax extensions.
+                    //
+                    // TypeScript parameter declaration syntax extensions include:
+                    // - decorators
+                    // - accessibility modifiers
+                    // - the question mark (?) token for optional parameters
+                    // - type annotations
+                    // - this parameters
+                    return visitParameter(node);
+                case 191 /* ParenthesizedExpression */:
+                    // ParenthesizedExpressions are TypeScript if their expression is a
+                    // TypeAssertion or AsExpression
+                    return visitParenthesizedExpression(node);
+                case 190 /* TypeAssertionExpression */:
+                case 208 /* AsExpression */:
+                    // TypeScript type assertions are removed, but their subtrees are preserved.
+                    return visitAssertionExpression(node);
+                case 187 /* CallExpression */:
+                    return visitCallExpression(node);
+                case 188 /* NewExpression */:
+                    return visitNewExpression(node);
+                case 189 /* TaggedTemplateExpression */:
+                    return visitTaggedTemplateExpression(node);
+                case 209 /* NonNullExpression */:
+                    // TypeScript non-null expressions are removed, but their subtrees are preserved.
+                    return visitNonNullExpression(node);
+                case 238 /* EnumDeclaration */:
+                    // TypeScript enum declarations do not exist in ES6 and must be rewritten.
+                    return visitEnumDeclaration(node);
+                case 214 /* VariableStatement */:
+                    // TypeScript namespace exports for variable statements must be transformed.
+                    return visitVariableStatement(node);
+                case 232 /* VariableDeclaration */:
+                    return visitVariableDeclaration(node);
+                case 239 /* ModuleDeclaration */:
+                    // TypeScript namespace declarations must be transformed.
+                    return visitModuleDeclaration(node);
+                case 243 /* ImportEqualsDeclaration */:
+                    // TypeScript namespace or external module import.
+                    return visitImportEqualsDeclaration(node);
+                default:
+                    return ts.Debug.failBadSyntaxKind(node);
+            }
+        }
+        function visitSourceFile(node) {
+            var alwaysStrict = ts.getStrictOptionValue(compilerOptions, "alwaysStrict") &&
+                !(ts.isExternalModule(node) && moduleKind >= ts.ModuleKind.ES2015) &&
+                !ts.isJsonSourceFile(node);
+            return ts.updateSourceFileNode(node, ts.visitLexicalEnvironment(node.statements, sourceElementVisitor, context, /*start*/ 0, alwaysStrict));
+        }
+        /**
+         * Tests whether we should emit a __decorate call for a class declaration.
+         */
+        function shouldEmitDecorateCallForClass(node) {
+            if (node.decorators && node.decorators.length > 0) {
+                return true;
+            }
+            var constructor = ts.getFirstConstructorWithBody(node);
+            if (constructor) {
+                return ts.forEach(constructor.parameters, shouldEmitDecorateCallForParameter);
+            }
+            return false;
+        }
+        /**
+         * Tests whether we should emit a __decorate call for a parameter declaration.
+         */
+        function shouldEmitDecorateCallForParameter(parameter) {
+            return parameter.decorators !== undefined && parameter.decorators.length > 0;
+        }
+        function getClassFacts(node, staticProperties) {
+            var facts = 0 /* None */;
+            if (ts.some(staticProperties))
+                facts |= 1 /* HasStaticInitializedProperties */;
+            var extendsClauseElement = ts.getClassExtendsHeritageClauseElement(node);
+            if (extendsClauseElement && ts.skipOuterExpressions(extendsClauseElement.expression).kind !== 95 /* NullKeyword */)
+                facts |= 64 /* IsDerivedClass */;
+            if (shouldEmitDecorateCallForClass(node))
+                facts |= 2 /* HasConstructorDecorators */;
+            if (ts.childIsDecorated(node))
+                facts |= 4 /* HasMemberDecorators */;
+            if (isExportOfNamespace(node))
+                facts |= 8 /* IsExportOfNamespace */;
+            else if (isDefaultExternalModuleExport(node))
+                facts |= 32 /* IsDefaultExternalExport */;
+            else if (isNamedExternalModuleExport(node))
+                facts |= 16 /* IsNamedExternalExport */;
+            if (languageVersion <= 1 /* ES5 */ && (facts & 7 /* MayNeedImmediatelyInvokedFunctionExpression */))
+                facts |= 128 /* UseImmediatelyInvokedFunctionExpression */;
+            return facts;
+        }
+        /**
+         * Transforms a class declaration with TypeScript syntax into compatible ES6.
+         *
+         * This function will only be called when one of the following conditions are met:
+         * - The class has decorators.
+         * - The class has property declarations with initializers.
+         * - The class contains a constructor that contains parameters with accessibility modifiers.
+         * - The class is an export in a TypeScript namespace.
+         *
+         * @param node The node to transform.
+         */
+        function visitClassDeclaration(node) {
+            var savedPendingExpressions = pendingExpressions;
+            pendingExpressions = undefined;
+            var staticProperties = getInitializedProperties(node, /*isStatic*/ true);
+            var facts = getClassFacts(node, staticProperties);
+            if (facts & 128 /* UseImmediatelyInvokedFunctionExpression */) {
+                context.startLexicalEnvironment();
+            }
+            var name = node.name || (facts & 5 /* NeedsName */ ? ts.getGeneratedNameForNode(node) : undefined);
+            var classStatement = facts & 2 /* HasConstructorDecorators */
+                ? createClassDeclarationHeadWithDecorators(node, name, facts)
+                : createClassDeclarationHeadWithoutDecorators(node, name, facts);
+            var statements = [classStatement];
+            // Write any pending expressions from elided or moved computed property names
+            if (ts.some(pendingExpressions)) {
+                statements.push(ts.createStatement(ts.inlineExpressions(pendingExpressions)));
+            }
+            pendingExpressions = savedPendingExpressions;
+            // Emit static property assignment. Because classDeclaration is lexically evaluated,
+            // it is safe to emit static property assignment after classDeclaration
+            // From ES6 specification:
+            //      HasLexicalDeclaration (N) : Determines if the argument identifier has a binding in this environment record that was created using
+            //                                  a lexical declaration such as a LexicalDeclaration or a ClassDeclaration.
+            if (facts & 1 /* HasStaticInitializedProperties */) {
+                addInitializedPropertyStatements(statements, staticProperties, facts & 128 /* UseImmediatelyInvokedFunctionExpression */ ? ts.getInternalName(node) : ts.getLocalName(node));
+            }
+            // Write any decorators of the node.
+            addClassElementDecorationStatements(statements, node, /*isStatic*/ false);
+            addClassElementDecorationStatements(statements, node, /*isStatic*/ true);
+            addConstructorDecorationStatement(statements, node);
+            if (facts & 128 /* UseImmediatelyInvokedFunctionExpression */) {
+                // When we emit a TypeScript class down to ES5, we must wrap it in an IIFE so that the
+                // 'es2015' transformer can properly nest static initializers and decorators. The result
+                // looks something like:
+                //
+                //  var C = function () {
+                //      class C {
+                //      }
+                //      C.static_prop = 1;
+                //      return C;
+                //  }();
+                //
+                var closingBraceLocation = ts.createTokenRange(ts.skipTrivia(currentSourceFile.text, node.members.end), 18 /* CloseBraceToken */);
+                var localName = ts.getInternalName(node);
+                // The following partially-emitted expression exists purely to align our sourcemap
+                // emit with the original emitter.
+                var outer = ts.createPartiallyEmittedExpression(localName);
+                outer.end = closingBraceLocation.end;
+                ts.setEmitFlags(outer, 1536 /* NoComments */);
+                var statement = ts.createReturn(outer);
+                statement.pos = closingBraceLocation.pos;
+                ts.setEmitFlags(statement, 1536 /* NoComments */ | 384 /* NoTokenSourceMaps */);
+                statements.push(statement);
+                ts.prependStatements(statements, context.endLexicalEnvironment());
+                var iife = ts.createImmediatelyInvokedArrowFunction(statements);
+                ts.setEmitFlags(iife, 33554432 /* TypeScriptClassWrapper */);
+                var varStatement = ts.createVariableStatement(
+                /*modifiers*/ undefined, ts.createVariableDeclarationList([
+                    ts.createVariableDeclaration(ts.getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ false), 
+                    /*type*/ undefined, iife)
+                ]));
+                ts.setOriginalNode(varStatement, node);
+                ts.setCommentRange(varStatement, node);
+                ts.setSourceMapRange(varStatement, ts.moveRangePastDecorators(node));
+                ts.startOnNewLine(varStatement);
+                statements = [varStatement];
+            }
+            // If the class is exported as part of a TypeScript namespace, emit the namespace export.
+            // Otherwise, if the class was exported at the top level and was decorated, emit an export
+            // declaration or export default for the class.
+            if (facts & 8 /* IsExportOfNamespace */) {
+                addExportMemberAssignment(statements, node);
+            }
+            else if (facts & 128 /* UseImmediatelyInvokedFunctionExpression */ || facts & 2 /* HasConstructorDecorators */) {
+                if (facts & 32 /* IsDefaultExternalExport */) {
+                    statements.push(ts.createExportDefault(ts.getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ true)));
+                }
+                else if (facts & 16 /* IsNamedExternalExport */) {
+                    statements.push(ts.createExternalModuleExport(ts.getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ true)));
+                }
+            }
+            if (statements.length > 1) {
+                // Add a DeclarationMarker as a marker for the end of the declaration
+                statements.push(ts.createEndOfDeclarationMarker(node));
+                ts.setEmitFlags(classStatement, ts.getEmitFlags(classStatement) | 4194304 /* HasEndOfDeclarationMarker */);
+            }
+            return ts.singleOrMany(statements);
+        }
+        /**
+         * Transforms a non-decorated class declaration and appends the resulting statements.
+         *
+         * @param node A ClassDeclaration node.
+         * @param name The name of the class.
+         * @param facts Precomputed facts about the class.
+         */
+        function createClassDeclarationHeadWithoutDecorators(node, name, facts) {
+            //  ${modifiers} class ${name} ${heritageClauses} {
+            //      ${members}
+            //  }
+            // we do not emit modifiers on the declaration if we are emitting an IIFE
+            var modifiers = !(facts & 128 /* UseImmediatelyInvokedFunctionExpression */)
+                ? ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier)
+                : undefined;
+            var classDeclaration = ts.createClassDeclaration(
+            /*decorators*/ undefined, modifiers, name, 
+            /*typeParameters*/ undefined, ts.visitNodes(node.heritageClauses, visitor, ts.isHeritageClause), transformClassMembers(node, (facts & 64 /* IsDerivedClass */) !== 0));
+            // To better align with the old emitter, we should not emit a trailing source map
+            // entry if the class has static properties.
+            var emitFlags = ts.getEmitFlags(node);
+            if (facts & 1 /* HasStaticInitializedProperties */) {
+                emitFlags |= 32 /* NoTrailingSourceMap */;
+            }
+            ts.setTextRange(classDeclaration, node);
+            ts.setOriginalNode(classDeclaration, node);
+            ts.setEmitFlags(classDeclaration, emitFlags);
+            return classDeclaration;
+        }
+        /**
+         * Transforms a decorated class declaration and appends the resulting statements. If
+         * the class requires an alias to avoid issues with double-binding, the alias is returned.
+         */
+        function createClassDeclarationHeadWithDecorators(node, name, facts) {
+            // When we emit an ES6 class that has a class decorator, we must tailor the
+            // emit to certain specific cases.
+            //
+            // In the simplest case, we emit the class declaration as a let declaration, and
+            // evaluate decorators after the close of the class body:
+            //
+            //  [Example 1]
+            //  ---------------------------------------------------------------------
+            //  TypeScript                      | Javascript
+            //  ---------------------------------------------------------------------
+            //  @dec                            | let C = class C {
+            //  class C {                       | }
+            //  }                               | C = __decorate([dec], C);
+            //  ---------------------------------------------------------------------
+            //  @dec                            | let C = class C {
+            //  export class C {                | }
+            //  }                               | C = __decorate([dec], C);
+            //                                  | export { C };
+            //  ---------------------------------------------------------------------
+            //
+            // If a class declaration contains a reference to itself *inside* of the class body,
+            // this introduces two bindings to the class: One outside of the class body, and one
+            // inside of the class body. If we apply decorators as in [Example 1] above, there
+            // is the possibility that the decorator `dec` will return a new value for the
+            // constructor, which would result in the binding inside of the class no longer
+            // pointing to the same reference as the binding outside of the class.
+            //
+            // As a result, we must instead rewrite all references to the class *inside* of the
+            // class body to instead point to a local temporary alias for the class:
+            //
+            //  [Example 2]
+            //  ---------------------------------------------------------------------
+            //  TypeScript                      | Javascript
+            //  ---------------------------------------------------------------------
+            //  @dec                            | let C = C_1 = class C {
+            //  class C {                       |   static x() { return C_1.y; }
+            //    static x() { return C.y; }    | }
+            //    static y = 1;                 | C.y = 1;
+            //  }                               | C = C_1 = __decorate([dec], C);
+            //                                  | var C_1;
+            //  ---------------------------------------------------------------------
+            //  @dec                            | let C = class C {
+            //  export class C {                |   static x() { return C_1.y; }
+            //    static x() { return C.y; }    | }
+            //    static y = 1;                 | C.y = 1;
+            //  }                               | C = C_1 = __decorate([dec], C);
+            //                                  | export { C };
+            //                                  | var C_1;
+            //  ---------------------------------------------------------------------
+            //
+            // If a class declaration is the default export of a module, we instead emit
+            // the export after the decorated declaration:
+            //
+            //  [Example 3]
+            //  ---------------------------------------------------------------------
+            //  TypeScript                      | Javascript
+            //  ---------------------------------------------------------------------
+            //  @dec                            | let default_1 = class {
+            //  export default class {          | }
+            //  }                               | default_1 = __decorate([dec], default_1);
+            //                                  | export default default_1;
+            //  ---------------------------------------------------------------------
+            //  @dec                            | let C = class C {
+            //  export default class C {        | }
+            //  }                               | C = __decorate([dec], C);
+            //                                  | export default C;
+            //  ---------------------------------------------------------------------
+            //
+            // If the class declaration is the default export and a reference to itself
+            // inside of the class body, we must emit both an alias for the class *and*
+            // move the export after the declaration:
+            //
+            //  [Example 4]
+            //  ---------------------------------------------------------------------
+            //  TypeScript                      | Javascript
+            //  ---------------------------------------------------------------------
+            //  @dec                            | let C = class C {
+            //  export default class C {        |   static x() { return C_1.y; }
+            //    static x() { return C.y; }    | }
+            //    static y = 1;                 | C.y = 1;
+            //  }                               | C = C_1 = __decorate([dec], C);
+            //                                  | export default C;
+            //                                  | var C_1;
+            //  ---------------------------------------------------------------------
+            //
+            var location = ts.moveRangePastDecorators(node);
+            var classAlias = getClassAliasIfNeeded(node);
+            var declName = ts.getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ true);
+            //  ... = class ${name} ${heritageClauses} {
+            //      ${members}
+            //  }
+            var heritageClauses = ts.visitNodes(node.heritageClauses, visitor, ts.isHeritageClause);
+            var members = transformClassMembers(node, (facts & 64 /* IsDerivedClass */) !== 0);
+            var classExpression = ts.createClassExpression(/*modifiers*/ undefined, name, /*typeParameters*/ undefined, heritageClauses, members);
+            ts.setOriginalNode(classExpression, node);
+            ts.setTextRange(classExpression, location);
+            //  let ${name} = ${classExpression} where name is either declaredName if the class doesn't contain self-reference
+            //                                         or decoratedClassAlias if the class contain self-reference.
+            var statement = ts.createVariableStatement(
+            /*modifiers*/ undefined, ts.createVariableDeclarationList([
+                ts.createVariableDeclaration(declName, 
+                /*type*/ undefined, classAlias ? ts.createAssignment(classAlias, classExpression) : classExpression)
+            ], 1 /* Let */));
+            ts.setOriginalNode(statement, node);
+            ts.setTextRange(statement, location);
+            ts.setCommentRange(statement, node);
+            return statement;
+        }
+        /**
+         * Transforms a class expression with TypeScript syntax into compatible ES6.
+         *
+         * This function will only be called when one of the following conditions are met:
+         * - The class has property declarations with initializers.
+         * - The class contains a constructor that contains parameters with accessibility modifiers.
+         *
+         * @param node The node to transform.
+         */
+        function visitClassExpression(node) {
+            var savedPendingExpressions = pendingExpressions;
+            pendingExpressions = undefined;
+            var staticProperties = getInitializedProperties(node, /*isStatic*/ true);
+            var heritageClauses = ts.visitNodes(node.heritageClauses, visitor, ts.isHeritageClause);
+            var members = transformClassMembers(node, ts.some(heritageClauses, function (c) { return c.token === 85 /* ExtendsKeyword */; }));
+            var classExpression = ts.createClassExpression(
+            /*modifiers*/ undefined, node.name, 
+            /*typeParameters*/ undefined, heritageClauses, members);
+            ts.setOriginalNode(classExpression, node);
+            ts.setTextRange(classExpression, node);
+            if (ts.some(staticProperties) || ts.some(pendingExpressions)) {
+                var expressions = [];
+                var isClassWithConstructorReference = resolver.getNodeCheckFlags(node) & 8388608 /* ClassWithConstructorReference */;
+                var temp = ts.createTempVariable(hoistVariableDeclaration, !!isClassWithConstructorReference);
+                if (isClassWithConstructorReference) {
+                    // record an alias as the class name is not in scope for statics.
+                    enableSubstitutionForClassAliases();
+                    var alias = ts.getSynthesizedClone(temp);
+                    alias.autoGenerateFlags &= ~8 /* ReservedInNestedScopes */;
+                    classAliases[ts.getOriginalNodeId(node)] = alias;
+                }
+                // To preserve the behavior of the old emitter, we explicitly indent
+                // the body of a class with static initializers.
+                ts.setEmitFlags(classExpression, 65536 /* Indented */ | ts.getEmitFlags(classExpression));
+                expressions.push(ts.startOnNewLine(ts.createAssignment(temp, classExpression)));
+                // Add any pending expressions leftover from elided or relocated computed property names
+                ts.addRange(expressions, ts.map(pendingExpressions, ts.startOnNewLine));
+                pendingExpressions = savedPendingExpressions;
+                ts.addRange(expressions, generateInitializedPropertyExpressions(staticProperties, temp));
+                expressions.push(ts.startOnNewLine(temp));
+                return ts.inlineExpressions(expressions);
+            }
+            pendingExpressions = savedPendingExpressions;
+            return classExpression;
+        }
+        /**
+         * Transforms the members of a class.
+         *
+         * @param node The current class.
+         * @param isDerivedClass A value indicating whether the class has an extends clause that does not extend 'null'.
+         */
+        function transformClassMembers(node, isDerivedClass) {
+            var members = [];
+            var constructor = transformConstructor(node, isDerivedClass);
+            if (constructor) {
+                members.push(constructor);
+            }
+            ts.addRange(members, ts.visitNodes(node.members, classElementVisitor, ts.isClassElement));
+            return ts.setTextRange(ts.createNodeArray(members), /*location*/ node.members);
+        }
+        /**
+         * Transforms (or creates) a constructor for a class.
+         *
+         * @param node The current class.
+         * @param isDerivedClass A value indicating whether the class has an extends clause that does not extend 'null'.
+         */
+        function transformConstructor(node, isDerivedClass) {
+            // Check if we have property assignment inside class declaration.
+            // If there is a property assignment, we need to emit constructor whether users define it or not
+            // If there is no property assignment, we can omit constructor if users do not define it
+            var hasInstancePropertyWithInitializer = ts.forEach(node.members, isInstanceInitializedProperty);
+            var hasParameterPropertyAssignments = node.transformFlags & 262144 /* ContainsParameterPropertyAssignments */;
+            var constructor = ts.getFirstConstructorWithBody(node);
+            // If the class does not contain nodes that require a synthesized constructor,
+            // accept the current constructor if it exists.
+            if (!hasInstancePropertyWithInitializer && !hasParameterPropertyAssignments) {
+                return ts.visitEachChild(constructor, visitor, context);
+            }
+            var parameters = transformConstructorParameters(constructor);
+            var body = transformConstructorBody(node, constructor, isDerivedClass);
+            //  constructor(${parameters}) {
+            //      ${body}
+            //  }
+            return ts.startOnNewLine(ts.setOriginalNode(ts.setTextRange(ts.createConstructor(
+            /*decorators*/ undefined, 
+            /*modifiers*/ undefined, parameters, body), constructor || node), constructor));
+        }
+        /**
+         * Transforms (or creates) the parameters for the constructor of a class with
+         * parameter property assignments or instance property initializers.
+         *
+         * @param constructor The constructor declaration.
+         */
+        function transformConstructorParameters(constructor) {
+            // The ES2015 spec specifies in 14.5.14. Runtime Semantics: ClassDefinitionEvaluation:
+            // If constructor is empty, then
+            //     If ClassHeritag_eopt is present and protoParent is not null, then
+            //          Let constructor be the result of parsing the source text
+            //              constructor(...args) { super (...args);}
+            //          using the syntactic grammar with the goal symbol MethodDefinition[~Yield].
+            //      Else,
+            //           Let constructor be the result of parsing the source text
+            //               constructor( ){ }
+            //           using the syntactic grammar with the goal symbol MethodDefinition[~Yield].
+            //
+            // While we could emit the '...args' rest parameter, certain later tools in the pipeline might
+            // downlevel the '...args' portion less efficiently by naively copying the contents of 'arguments' to an array.
+            // Instead, we'll avoid using a rest parameter and spread into the super call as
+            // 'super(...arguments)' instead of 'super(...args)', as you can see in "transformConstructorBody".
+            return ts.visitParameterList(constructor && constructor.parameters, visitor, context)
+                || [];
+        }
+        /**
+         * Transforms (or creates) a constructor body for a class with parameter property
+         * assignments or instance property initializers.
+         *
+         * @param node The current class.
+         * @param constructor The current class constructor.
+         * @param isDerivedClass A value indicating whether the class has an extends clause that does not extend 'null'.
+         */
+        function transformConstructorBody(node, constructor, isDerivedClass) {
+            var statements = [];
+            var indexOfFirstStatement = 0;
+            resumeLexicalEnvironment();
+            if (constructor) {
+                indexOfFirstStatement = addPrologueDirectivesAndInitialSuperCall(constructor, statements);
+                // Add parameters with property assignments. Transforms this:
+                //
+                //  constructor (public x, public y) {
+                //  }
+                //
+                // Into this:
+                //
+                //  constructor (x, y) {
+                //      this.x = x;
+                //      this.y = y;
+                //  }
+                //
+                var propertyAssignments = getParametersWithPropertyAssignments(constructor);
+                ts.addRange(statements, ts.map(propertyAssignments, transformParameterWithPropertyAssignment));
+            }
+            else if (isDerivedClass) {
+                // Add a synthetic `super` call:
+                //
+                //  super(...arguments);
+                //
+                statements.push(ts.createStatement(ts.createCall(ts.createSuper(), 
+                /*typeArguments*/ undefined, [ts.createSpread(ts.createIdentifier("arguments"))])));
+            }
+            // Add the property initializers. Transforms this:
+            //
+            //  public x = 1;
+            //
+            // Into this:
+            //
+            //  constructor() {
+            //      this.x = 1;
+            //  }
+            //
+            var properties = getInitializedProperties(node, /*isStatic*/ false);
+            addInitializedPropertyStatements(statements, properties, ts.createThis());
+            if (constructor) {
+                // The class already had a constructor, so we should add the existing statements, skipping the initial super call.
+                ts.addRange(statements, ts.visitNodes(constructor.body.statements, visitor, ts.isStatement, indexOfFirstStatement));
+            }
+            // End the lexical environment.
+            statements = ts.mergeLexicalEnvironment(statements, endLexicalEnvironment());
+            return ts.setTextRange(ts.createBlock(ts.setTextRange(ts.createNodeArray(statements), 
+            /*location*/ constructor ? constructor.body.statements : node.members), 
+            /*multiLine*/ true), 
+            /*location*/ constructor ? constructor.body : undefined);
+        }
+        /**
+         * Adds super call and preceding prologue directives into the list of statements.
+         *
+         * @param ctor The constructor node.
+         * @returns index of the statement that follows super call
+         */
+        function addPrologueDirectivesAndInitialSuperCall(ctor, result) {
+            if (ctor.body) {
+                var statements = ctor.body.statements;
+                // add prologue directives to the list (if any)
+                var index = ts.addPrologue(result, statements, /*ensureUseStrict*/ false, visitor);
+                if (index === statements.length) {
+                    // list contains nothing but prologue directives (or empty) - exit
+                    return index;
+                }
+                var statement = statements[index];
+                if (statement.kind === 216 /* ExpressionStatement */ && ts.isSuperCall(statement.expression)) {
+                    result.push(ts.visitNode(statement, visitor, ts.isStatement));
+                    return index + 1;
+                }
+                return index;
+            }
+            return 0;
+        }
+        /**
+         * Gets all parameters of a constructor that should be transformed into property assignments.
+         *
+         * @param node The constructor node.
+         */
+        function getParametersWithPropertyAssignments(node) {
+            return ts.filter(node.parameters, isParameterWithPropertyAssignment);
+        }
+        /**
+         * Determines whether a parameter should be transformed into a property assignment.
+         *
+         * @param parameter The parameter node.
+         */
+        function isParameterWithPropertyAssignment(parameter) {
+            return ts.hasModifier(parameter, 92 /* ParameterPropertyModifier */)
+                && ts.isIdentifier(parameter.name);
+        }
+        /**
+         * Transforms a parameter into a property assignment statement.
+         *
+         * @param node The parameter declaration.
+         */
+        function transformParameterWithPropertyAssignment(node) {
+            ts.Debug.assert(ts.isIdentifier(node.name));
+            var name = node.name;
+            var propertyName = ts.getMutableClone(name);
+            ts.setEmitFlags(propertyName, 1536 /* NoComments */ | 48 /* NoSourceMap */);
+            var localName = ts.getMutableClone(name);
+            ts.setEmitFlags(localName, 1536 /* NoComments */);
+            return ts.startOnNewLine(ts.setEmitFlags(ts.setTextRange(ts.createStatement(ts.createAssignment(ts.setTextRange(ts.createPropertyAccess(ts.createThis(), propertyName), node.name), localName)), ts.moveRangePos(node, -1)), 1536 /* NoComments */));
+        }
+        /**
+         * Gets all property declarations with initializers on either the static or instance side of a class.
+         *
+         * @param node The class node.
+         * @param isStatic A value indicating whether to get properties from the static or instance side of the class.
+         */
+        function getInitializedProperties(node, isStatic) {
+            return ts.filter(node.members, isStatic ? isStaticInitializedProperty : isInstanceInitializedProperty);
+        }
+        /**
+         * Gets a value indicating whether a class element is a static property declaration with an initializer.
+         *
+         * @param member The class element node.
+         */
+        function isStaticInitializedProperty(member) {
+            return isInitializedProperty(member, /*isStatic*/ true);
+        }
+        /**
+         * Gets a value indicating whether a class element is an instance property declaration with an initializer.
+         *
+         * @param member The class element node.
+         */
+        function isInstanceInitializedProperty(member) {
+            return isInitializedProperty(member, /*isStatic*/ false);
+        }
+        /**
+         * Gets a value indicating whether a class element is either a static or an instance property declaration with an initializer.
+         *
+         * @param member The class element node.
+         * @param isStatic A value indicating whether the member should be a static or instance member.
+         */
+        function isInitializedProperty(member, isStatic) {
+            return member.kind === 152 /* PropertyDeclaration */
+                && isStatic === ts.hasModifier(member, 32 /* Static */)
+                && member.initializer !== undefined;
+        }
+        /**
+         * Generates assignment statements for property initializers.
+         *
+         * @param properties An array of property declarations to transform.
+         * @param receiver The receiver on which each property should be assigned.
+         */
+        function addInitializedPropertyStatements(statements, properties, receiver) {
+            for (var _i = 0, properties_10 = properties; _i < properties_10.length; _i++) {
+                var property = properties_10[_i];
+                var statement = ts.createStatement(transformInitializedProperty(property, receiver));
+                ts.setSourceMapRange(statement, ts.moveRangePastModifiers(property));
+                ts.setCommentRange(statement, property);
+                statements.push(statement);
+            }
+        }
+        /**
+         * Generates assignment expressions for property initializers.
+         *
+         * @param properties An array of property declarations to transform.
+         * @param receiver The receiver on which each property should be assigned.
+         */
+        function generateInitializedPropertyExpressions(properties, receiver) {
+            var expressions = [];
+            for (var _i = 0, properties_11 = properties; _i < properties_11.length; _i++) {
+                var property = properties_11[_i];
+                var expression = transformInitializedProperty(property, receiver);
+                ts.startOnNewLine(expression);
+                ts.setSourceMapRange(expression, ts.moveRangePastModifiers(property));
+                ts.setCommentRange(expression, property);
+                expressions.push(expression);
+            }
+            return expressions;
+        }
+        /**
+         * Transforms a property initializer into an assignment statement.
+         *
+         * @param property The property declaration.
+         * @param receiver The object receiving the property assignment.
+         */
+        function transformInitializedProperty(property, receiver) {
+            // We generate a name here in order to reuse the value cached by the relocated computed name expression (which uses the same generated name)
+            var propertyName = ts.isComputedPropertyName(property.name) && !isSimpleInlineableExpression(property.name.expression)
+                ? ts.updateComputedPropertyName(property.name, ts.getGeneratedNameForNode(property.name))
+                : property.name;
+            var initializer = ts.visitNode(property.initializer, visitor, ts.isExpression);
+            var memberAccess = ts.createMemberAccessForPropertyName(receiver, propertyName, /*location*/ propertyName);
+            return ts.createAssignment(memberAccess, initializer);
+        }
+        /**
+         * Gets either the static or instance members of a class that are decorated, or have
+         * parameters that are decorated.
+         *
+         * @param node The class containing the member.
+         * @param isStatic A value indicating whether to retrieve static or instance members of
+         *                 the class.
+         */
+        function getDecoratedClassElements(node, isStatic) {
+            return ts.filter(node.members, isStatic ? function (m) { return isStaticDecoratedClassElement(m, node); } : function (m) { return isInstanceDecoratedClassElement(m, node); });
+        }
+        /**
+         * Determines whether a class member is a static member of a class that is decorated, or
+         * has parameters that are decorated.
+         *
+         * @param member The class member.
+         */
+        function isStaticDecoratedClassElement(member, parent) {
+            return isDecoratedClassElement(member, /*isStatic*/ true, parent);
+        }
+        /**
+         * Determines whether a class member is an instance member of a class that is decorated,
+         * or has parameters that are decorated.
+         *
+         * @param member The class member.
+         */
+        function isInstanceDecoratedClassElement(member, parent) {
+            return isDecoratedClassElement(member, /*isStatic*/ false, parent);
+        }
+        /**
+         * Determines whether a class member is either a static or an instance member of a class
+         * that is decorated, or has parameters that are decorated.
+         *
+         * @param member The class member.
+         */
+        function isDecoratedClassElement(member, isStatic, parent) {
+            return ts.nodeOrChildIsDecorated(member, parent)
+                && isStatic === ts.hasModifier(member, 32 /* Static */);
+        }
+        /**
+         * Gets an array of arrays of decorators for the parameters of a function-like node.
+         * The offset into the result array should correspond to the offset of the parameter.
+         *
+         * @param node The function-like node.
+         */
+        function getDecoratorsOfParameters(node) {
+            var decorators;
+            if (node) {
+                var parameters = node.parameters;
+                for (var i = 0; i < parameters.length; i++) {
+                    var parameter = parameters[i];
+                    if (decorators || parameter.decorators) {
+                        if (!decorators) {
+                            decorators = new Array(parameters.length);
+                        }
+                        decorators[i] = parameter.decorators;
+                    }
+                }
+            }
+            return decorators;
+        }
+        /**
+         * Gets an AllDecorators object containing the decorators for the class and the decorators for the
+         * parameters of the constructor of the class.
+         *
+         * @param node The class node.
+         */
+        function getAllDecoratorsOfConstructor(node) {
+            var decorators = node.decorators;
+            var parameters = getDecoratorsOfParameters(ts.getFirstConstructorWithBody(node));
+            if (!decorators && !parameters) {
+                return undefined;
+            }
+            return {
+                decorators: decorators,
+                parameters: parameters
+            };
+        }
+        /**
+         * Gets an AllDecorators object containing the decorators for the member and its parameters.
+         *
+         * @param node The class node that contains the member.
+         * @param member The class member.
+         */
+        function getAllDecoratorsOfClassElement(node, member) {
+            switch (member.kind) {
+                case 156 /* GetAccessor */:
+                case 157 /* SetAccessor */:
+                    return getAllDecoratorsOfAccessors(node, member);
+                case 154 /* MethodDeclaration */:
+                    return getAllDecoratorsOfMethod(member);
+                case 152 /* PropertyDeclaration */:
+                    return getAllDecoratorsOfProperty(member);
+                default:
+                    return undefined;
+            }
+        }
+        /**
+         * Gets an AllDecorators object containing the decorators for the accessor and its parameters.
+         *
+         * @param node The class node that contains the accessor.
+         * @param accessor The class accessor member.
+         */
+        function getAllDecoratorsOfAccessors(node, accessor) {
+            if (!accessor.body) {
+                return undefined;
+            }
+            var _a = ts.getAllAccessorDeclarations(node.members, accessor), firstAccessor = _a.firstAccessor, secondAccessor = _a.secondAccessor, setAccessor = _a.setAccessor;
+            var firstAccessorWithDecorators = firstAccessor.decorators ? firstAccessor : secondAccessor && secondAccessor.decorators ? secondAccessor : undefined;
+            if (!firstAccessorWithDecorators || accessor !== firstAccessorWithDecorators) {
+                return undefined;
+            }
+            var decorators = firstAccessorWithDecorators.decorators;
+            var parameters = getDecoratorsOfParameters(setAccessor);
+            if (!decorators && !parameters) {
+                return undefined;
+            }
+            return { decorators: decorators, parameters: parameters };
+        }
+        /**
+         * Gets an AllDecorators object containing the decorators for the method and its parameters.
+         *
+         * @param method The class method member.
+         */
+        function getAllDecoratorsOfMethod(method) {
+            if (!method.body) {
+                return undefined;
+            }
+            var decorators = method.decorators;
+            var parameters = getDecoratorsOfParameters(method);
+            if (!decorators && !parameters) {
+                return undefined;
+            }
+            return { decorators: decorators, parameters: parameters };
+        }
+        /**
+         * Gets an AllDecorators object containing the decorators for the property.
+         *
+         * @param property The class property member.
+         */
+        function getAllDecoratorsOfProperty(property) {
+            var decorators = property.decorators;
+            if (!decorators) {
+                return undefined;
+            }
+            return { decorators: decorators };
+        }
+        /**
+         * Transforms all of the decorators for a declaration into an array of expressions.
+         *
+         * @param node The declaration node.
+         * @param allDecorators An object containing all of the decorators for the declaration.
+         */
+        function transformAllDecoratorsOfDeclaration(node, container, allDecorators) {
+            if (!allDecorators) {
+                return undefined;
+            }
+            var decoratorExpressions = [];
+            ts.addRange(decoratorExpressions, ts.map(allDecorators.decorators, transformDecorator));
+            ts.addRange(decoratorExpressions, ts.flatMap(allDecorators.parameters, transformDecoratorsOfParameter));
+            addTypeMetadata(node, container, decoratorExpressions);
+            return decoratorExpressions;
+        }
+        /**
+         * Generates statements used to apply decorators to either the static or instance members
+         * of a class.
+         *
+         * @param node The class node.
+         * @param isStatic A value indicating whether to generate statements for static or
+         *                 instance members.
+         */
+        function addClassElementDecorationStatements(statements, node, isStatic) {
+            ts.addRange(statements, ts.map(generateClassElementDecorationExpressions(node, isStatic), expressionToStatement));
+        }
+        /**
+         * Generates expressions used to apply decorators to either the static or instance members
+         * of a class.
+         *
+         * @param node The class node.
+         * @param isStatic A value indicating whether to generate expressions for static or
+         *                 instance members.
+         */
+        function generateClassElementDecorationExpressions(node, isStatic) {
+            var members = getDecoratedClassElements(node, isStatic);
+            var expressions;
+            for (var _i = 0, members_5 = members; _i < members_5.length; _i++) {
+                var member = members_5[_i];
+                var expression = generateClassElementDecorationExpression(node, member);
+                if (expression) {
+                    if (!expressions) {
+                        expressions = [expression];
+                    }
+                    else {
+                        expressions.push(expression);
+                    }
+                }
+            }
+            return expressions;
+        }
+        /**
+         * Generates an expression used to evaluate class element decorators at runtime.
+         *
+         * @param node The class node that contains the member.
+         * @param member The class member.
+         */
+        function generateClassElementDecorationExpression(node, member) {
+            var allDecorators = getAllDecoratorsOfClassElement(node, member);
+            var decoratorExpressions = transformAllDecoratorsOfDeclaration(member, node, allDecorators);
+            if (!decoratorExpressions) {
+                return undefined;
+            }
+            // Emit the call to __decorate. Given the following:
+            //
+            //   class C {
+            //     @dec method(@dec2 x) {}
+            //     @dec get accessor() {}
+            //     @dec prop;
+            //   }
+            //
+            // The emit for a method is:
+            //
+            //   __decorate([
+            //       dec,
+            //       __param(0, dec2),
+            //       __metadata("design:type", Function),
+            //       __metadata("design:paramtypes", [Object]),
+            //       __metadata("design:returntype", void 0)
+            //   ], C.prototype, "method", null);
+            //
+            // The emit for an accessor is:
+            //
+            //   __decorate([
+            //       dec
+            //   ], C.prototype, "accessor", null);
+            //
+            // The emit for a property is:
+            //
+            //   __decorate([
+            //       dec
+            //   ], C.prototype, "prop");
+            //
+            var prefix = getClassMemberPrefix(node, member);
+            var memberName = getExpressionForPropertyName(member, /*generateNameForComputedPropertyName*/ true);
+            var descriptor = languageVersion > 0 /* ES3 */
+                ? member.kind === 152 /* PropertyDeclaration */
+                    // We emit `void 0` here to indicate to `__decorate` that it can invoke `Object.defineProperty` directly, but that it
+                    // should not invoke `Object.getOwnPropertyDescriptor`.
+                    ? ts.createVoidZero()
+                    // We emit `null` here to indicate to `__decorate` that it can invoke `Object.getOwnPropertyDescriptor` directly.
+                    // We have this extra argument here so that we can inject an explicit property descriptor at a later date.
+                    : ts.createNull()
+                : undefined;
+            var helper = createDecorateHelper(context, decoratorExpressions, prefix, memberName, descriptor, ts.moveRangePastDecorators(member));
+            ts.setEmitFlags(helper, 1536 /* NoComments */);
+            return helper;
+        }
+        /**
+         * Generates a __decorate helper call for a class constructor.
+         *
+         * @param node The class node.
+         */
+        function addConstructorDecorationStatement(statements, node) {
+            var expression = generateConstructorDecorationExpression(node);
+            if (expression) {
+                statements.push(ts.setOriginalNode(ts.createStatement(expression), node));
+            }
+        }
+        /**
+         * Generates a __decorate helper call for a class constructor.
+         *
+         * @param node The class node.
+         */
+        function generateConstructorDecorationExpression(node) {
+            var allDecorators = getAllDecoratorsOfConstructor(node);
+            var decoratorExpressions = transformAllDecoratorsOfDeclaration(node, node, allDecorators);
+            if (!decoratorExpressions) {
+                return undefined;
+            }
+            var classAlias = classAliases && classAliases[ts.getOriginalNodeId(node)];
+            var localName = ts.getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ true);
+            var decorate = createDecorateHelper(context, decoratorExpressions, localName);
+            var expression = ts.createAssignment(localName, classAlias ? ts.createAssignment(classAlias, decorate) : decorate);
+            ts.setEmitFlags(expression, 1536 /* NoComments */);
+            ts.setSourceMapRange(expression, ts.moveRangePastDecorators(node));
+            return expression;
+        }
+        /**
+         * Transforms a decorator into an expression.
+         *
+         * @param decorator The decorator node.
+         */
+        function transformDecorator(decorator) {
+            return ts.visitNode(decorator.expression, visitor, ts.isExpression);
+        }
+        /**
+         * Transforms the decorators of a parameter.
+         *
+         * @param decorators The decorators for the parameter at the provided offset.
+         * @param parameterOffset The offset of the parameter.
+         */
+        function transformDecoratorsOfParameter(decorators, parameterOffset) {
+            var expressions;
+            if (decorators) {
+                expressions = [];
+                for (var _i = 0, decorators_1 = decorators; _i < decorators_1.length; _i++) {
+                    var decorator = decorators_1[_i];
+                    var helper = createParamHelper(context, transformDecorator(decorator), parameterOffset, 
+                    /*location*/ decorator.expression);
+                    ts.setEmitFlags(helper, 1536 /* NoComments */);
+                    expressions.push(helper);
+                }
+            }
+            return expressions;
+        }
+        /**
+         * Adds optional type metadata for a declaration.
+         *
+         * @param node The declaration node.
+         * @param decoratorExpressions The destination array to which to add new decorator expressions.
+         */
+        function addTypeMetadata(node, container, decoratorExpressions) {
+            if (USE_NEW_TYPE_METADATA_FORMAT) {
+                addNewTypeMetadata(node, container, decoratorExpressions);
+            }
+            else {
+                addOldTypeMetadata(node, container, decoratorExpressions);
+            }
+        }
+        function addOldTypeMetadata(node, container, decoratorExpressions) {
+            if (compilerOptions.emitDecoratorMetadata) {
+                if (shouldAddTypeMetadata(node)) {
+                    decoratorExpressions.push(createMetadataHelper(context, "design:type", serializeTypeOfNode(node)));
+                }
+                if (shouldAddParamTypesMetadata(node)) {
+                    decoratorExpressions.push(createMetadataHelper(context, "design:paramtypes", serializeParameterTypesOfNode(node, container)));
+                }
+                if (shouldAddReturnTypeMetadata(node)) {
+                    decoratorExpressions.push(createMetadataHelper(context, "design:returntype", serializeReturnTypeOfNode(node)));
+                }
+            }
+        }
+        function addNewTypeMetadata(node, container, decoratorExpressions) {
+            if (compilerOptions.emitDecoratorMetadata) {
+                var properties = void 0;
+                if (shouldAddTypeMetadata(node)) {
+                    (properties || (properties = [])).push(ts.createPropertyAssignment("type", ts.createArrowFunction(/*modifiers*/ undefined, /*typeParameters*/ undefined, [], /*type*/ undefined, ts.createToken(36 /* EqualsGreaterThanToken */), serializeTypeOfNode(node))));
+                }
+                if (shouldAddParamTypesMetadata(node)) {
+                    (properties || (properties = [])).push(ts.createPropertyAssignment("paramTypes", ts.createArrowFunction(/*modifiers*/ undefined, /*typeParameters*/ undefined, [], /*type*/ undefined, ts.createToken(36 /* EqualsGreaterThanToken */), serializeParameterTypesOfNode(node, container))));
+                }
+                if (shouldAddReturnTypeMetadata(node)) {
+                    (properties || (properties = [])).push(ts.createPropertyAssignment("returnType", ts.createArrowFunction(/*modifiers*/ undefined, /*typeParameters*/ undefined, [], /*type*/ undefined, ts.createToken(36 /* EqualsGreaterThanToken */), serializeReturnTypeOfNode(node))));
+                }
+                if (properties) {
+                    decoratorExpressions.push(createMetadataHelper(context, "design:typeinfo", ts.createObjectLiteral(properties, /*multiLine*/ true)));
+                }
+            }
+        }
+        /**
+         * Determines whether to emit the "design:type" metadata based on the node's kind.
+         * The caller should have already tested whether the node has decorators and whether the
+         * emitDecoratorMetadata compiler option is set.
+         *
+         * @param node The node to test.
+         */
+        function shouldAddTypeMetadata(node) {
+            var kind = node.kind;
+            return kind === 154 /* MethodDeclaration */
+                || kind === 156 /* GetAccessor */
+                || kind === 157 /* SetAccessor */
+                || kind === 152 /* PropertyDeclaration */;
+        }
+        /**
+         * Determines whether to emit the "design:returntype" metadata based on the node's kind.
+         * The caller should have already tested whether the node has decorators and whether the
+         * emitDecoratorMetadata compiler option is set.
+         *
+         * @param node The node to test.
+         */
+        function shouldAddReturnTypeMetadata(node) {
+            return node.kind === 154 /* MethodDeclaration */;
+        }
+        /**
+         * Determines whether to emit the "design:paramtypes" metadata based on the node's kind.
+         * The caller should have already tested whether the node has decorators and whether the
+         * emitDecoratorMetadata compiler option is set.
+         *
+         * @param node The node to test.
+         */
+        function shouldAddParamTypesMetadata(node) {
+            switch (node.kind) {
+                case 235 /* ClassDeclaration */:
+                case 205 /* ClassExpression */:
+                    return ts.getFirstConstructorWithBody(node) !== undefined;
+                case 154 /* MethodDeclaration */:
+                case 156 /* GetAccessor */:
+                case 157 /* SetAccessor */:
+                    return true;
+            }
+            return false;
+        }
+        /**
+         * Serializes the type of a node for use with decorator type metadata.
+         *
+         * @param node The node that should have its type serialized.
+         */
+        function serializeTypeOfNode(node) {
+            switch (node.kind) {
+                case 152 /* PropertyDeclaration */:
+                case 149 /* Parameter */:
+                case 156 /* GetAccessor */:
+                    return serializeTypeNode(node.type);
+                case 157 /* SetAccessor */:
+                    return serializeTypeNode(ts.getSetAccessorTypeAnnotationNode(node));
+                case 235 /* ClassDeclaration */:
+                case 205 /* ClassExpression */:
+                case 154 /* MethodDeclaration */:
+                    return ts.createIdentifier("Function");
+                default:
+                    return ts.createVoidZero();
+            }
+        }
+        /**
+         * Serializes the types of the parameters of a node for use with decorator type metadata.
+         *
+         * @param node The node that should have its parameter types serialized.
+         */
+        function serializeParameterTypesOfNode(node, container) {
+            var valueDeclaration = ts.isClassLike(node)
+                ? ts.getFirstConstructorWithBody(node)
+                : ts.isFunctionLike(node) && ts.nodeIsPresent(node.body)
+                    ? node
+                    : undefined;
+            var expressions = [];
+            if (valueDeclaration) {
+                var parameters = getParametersOfDecoratedDeclaration(valueDeclaration, container);
+                var numParameters = parameters.length;
+                for (var i = 0; i < numParameters; i++) {
+                    var parameter = parameters[i];
+                    if (i === 0 && ts.isIdentifier(parameter.name) && parameter.name.escapedText === "this") {
+                        continue;
+                    }
+                    if (parameter.dotDotDotToken) {
+                        expressions.push(serializeTypeNode(ts.getRestParameterElementType(parameter.type)));
+                    }
+                    else {
+                        expressions.push(serializeTypeOfNode(parameter));
+                    }
+                }
+            }
+            return ts.createArrayLiteral(expressions);
+        }
+        function getParametersOfDecoratedDeclaration(node, container) {
+            if (container && node.kind === 156 /* GetAccessor */) {
+                var setAccessor = ts.getAllAccessorDeclarations(container.members, node).setAccessor;
+                if (setAccessor) {
+                    return setAccessor.parameters;
+                }
+            }
+            return node.parameters;
+        }
+        /**
+         * Serializes the return type of a node for use with decorator type metadata.
+         *
+         * @param node The node that should have its return type serialized.
+         */
+        function serializeReturnTypeOfNode(node) {
+            if (ts.isFunctionLike(node) && node.type) {
+                return serializeTypeNode(node.type);
+            }
+            else if (ts.isAsyncFunction(node)) {
+                return ts.createIdentifier("Promise");
+            }
+            return ts.createVoidZero();
+        }
+        /**
+         * Serializes a type node for use with decorator type metadata.
+         *
+         * Types are serialized in the following fashion:
+         * - Void types point to "undefined" (e.g. "void 0")
+         * - Function and Constructor types point to the global "Function" constructor.
+         * - Interface types with a call or construct signature types point to the global
+         *   "Function" constructor.
+         * - Array and Tuple types point to the global "Array" constructor.
+         * - Type predicates and booleans point to the global "Boolean" constructor.
+         * - String literal types and strings point to the global "String" constructor.
+         * - Enum and number types point to the global "Number" constructor.
+         * - Symbol types point to the global "Symbol" constructor.
+         * - Type references to classes (or class-like variables) point to the constructor for the class.
+         * - Anything else points to the global "Object" constructor.
+         *
+         * @param node The type node to serialize.
+         */
+        function serializeTypeNode(node) {
+            if (node === undefined) {
+                return ts.createIdentifier("Object");
+            }
+            switch (node.kind) {
+                case 105 /* VoidKeyword */:
+                case 140 /* UndefinedKeyword */:
+                case 95 /* NullKeyword */:
+                case 131 /* NeverKeyword */:
+                    return ts.createVoidZero();
+                case 173 /* ParenthesizedType */:
+                    return serializeTypeNode(node.type);
+                case 163 /* FunctionType */:
+                case 164 /* ConstructorType */:
+                    return ts.createIdentifier("Function");
+                case 167 /* ArrayType */:
+                case 168 /* TupleType */:
+                    return ts.createIdentifier("Array");
+                case 161 /* TypePredicate */:
+                case 122 /* BooleanKeyword */:
+                    return ts.createIdentifier("Boolean");
+                case 137 /* StringKeyword */:
+                    return ts.createIdentifier("String");
+                case 135 /* ObjectKeyword */:
+                    return ts.createIdentifier("Object");
+                case 178 /* LiteralType */:
+                    switch (node.literal.kind) {
+                        case 9 /* StringLiteral */:
+                            return ts.createIdentifier("String");
+                        case 8 /* NumericLiteral */:
+                            return ts.createIdentifier("Number");
+                        case 101 /* TrueKeyword */:
+                        case 86 /* FalseKeyword */:
+                            return ts.createIdentifier("Boolean");
+                        default:
+                            return ts.Debug.failBadSyntaxKind(node.literal);
+                    }
+                case 134 /* NumberKeyword */:
+                    return ts.createIdentifier("Number");
+                case 138 /* SymbolKeyword */:
+                    return languageVersion < 2 /* ES2015 */
+                        ? getGlobalSymbolNameWithFallback()
+                        : ts.createIdentifier("Symbol");
+                case 162 /* TypeReference */:
+                    return serializeTypeReferenceNode(node);
+                case 170 /* IntersectionType */:
+                case 169 /* UnionType */:
+                    return serializeUnionOrIntersectionType(node);
+                case 165 /* TypeQuery */:
+                case 175 /* TypeOperator */:
+                case 176 /* IndexedAccessType */:
+                case 177 /* MappedType */:
+                case 166 /* TypeLiteral */:
+                case 119 /* AnyKeyword */:
+                case 142 /* UnknownKeyword */:
+                case 174 /* ThisType */:
+                case 179 /* ImportType */:
+                    break;
+                default:
+                    return ts.Debug.failBadSyntaxKind(node);
+            }
+            return ts.createIdentifier("Object");
+        }
+        function serializeUnionOrIntersectionType(node) {
+            // Note when updating logic here also update getEntityNameForDecoratorMetadata
+            // so that aliases can be marked as referenced
+            var serializedUnion;
+            for (var _i = 0, _a = node.types; _i < _a.length; _i++) {
+                var typeNode = _a[_i];
+                while (typeNode.kind === 173 /* ParenthesizedType */) {
+                    typeNode = typeNode.type; // Skip parens if need be
+                }
+                if (typeNode.kind === 131 /* NeverKeyword */) {
+                    continue; // Always elide `never` from the union/intersection if possible
+                }
+                if (!strictNullChecks && (typeNode.kind === 95 /* NullKeyword */ || typeNode.kind === 140 /* UndefinedKeyword */)) {
+                    continue; // Elide null and undefined from unions for metadata, just like what we did prior to the implementation of strict null checks
+                }
+                var serializedIndividual = serializeTypeNode(typeNode);
+                if (ts.isIdentifier(serializedIndividual) && serializedIndividual.escapedText === "Object") {
+                    // One of the individual is global object, return immediately
+                    return serializedIndividual;
+                }
+                // If there exists union that is not void 0 expression, check if the the common type is identifier.
+                // anything more complex and we will just default to Object
+                else if (serializedUnion) {
+                    // Different types
+                    if (!ts.isIdentifier(serializedUnion) ||
+                        !ts.isIdentifier(serializedIndividual) ||
+                        serializedUnion.escapedText !== serializedIndividual.escapedText) {
+                        return ts.createIdentifier("Object");
+                    }
+                }
+                else {
+                    // Initialize the union type
+                    serializedUnion = serializedIndividual;
+                }
+            }
+            // If we were able to find common type, use it
+            return serializedUnion || ts.createVoidZero(); // Fallback is only hit if all union constituients are null/undefined/never
+        }
+        /**
+         * Serializes a TypeReferenceNode to an appropriate JS constructor value for use with
+         * decorator type metadata.
+         *
+         * @param node The type reference node.
+         */
+        function serializeTypeReferenceNode(node) {
+            var kind = resolver.getTypeReferenceSerializationKind(node.typeName, currentScope);
+            switch (kind) {
+                case ts.TypeReferenceSerializationKind.Unknown:
+                    var serialized = serializeEntityNameAsExpression(node.typeName, /*useFallback*/ true);
+                    var temp = ts.createTempVariable(hoistVariableDeclaration);
+                    return ts.createLogicalOr(ts.createLogicalAnd(ts.createTypeCheck(ts.createAssignment(temp, serialized), "function"), temp), ts.createIdentifier("Object"));
+                case ts.TypeReferenceSerializationKind.TypeWithConstructSignatureAndValue:
+                    return serializeEntityNameAsExpression(node.typeName, /*useFallback*/ false);
+                case ts.TypeReferenceSerializationKind.VoidNullableOrNeverType:
+                    return ts.createVoidZero();
+                case ts.TypeReferenceSerializationKind.BooleanType:
+                    return ts.createIdentifier("Boolean");
+                case ts.TypeReferenceSerializationKind.NumberLikeType:
+                    return ts.createIdentifier("Number");
+                case ts.TypeReferenceSerializationKind.StringLikeType:
+                    return ts.createIdentifier("String");
+                case ts.TypeReferenceSerializationKind.ArrayLikeType:
+                    return ts.createIdentifier("Array");
+                case ts.TypeReferenceSerializationKind.ESSymbolType:
+                    return languageVersion < 2 /* ES2015 */
+                        ? getGlobalSymbolNameWithFallback()
+                        : ts.createIdentifier("Symbol");
+                case ts.TypeReferenceSerializationKind.TypeWithCallSignature:
+                    return ts.createIdentifier("Function");
+                case ts.TypeReferenceSerializationKind.Promise:
+                    return ts.createIdentifier("Promise");
+                case ts.TypeReferenceSerializationKind.ObjectType:
+                    return ts.createIdentifier("Object");
+                default:
+                    return ts.Debug.assertNever(kind);
+            }
+        }
+        /**
+         * Serializes an entity name as an expression for decorator type metadata.
+         *
+         * @param node The entity name to serialize.
+         * @param useFallback A value indicating whether to use logical operators to test for the
+         *                    entity name at runtime.
+         */
+        function serializeEntityNameAsExpression(node, useFallback) {
+            switch (node.kind) {
+                case 71 /* Identifier */:
+                    // Create a clone of the name with a new parent, and treat it as if it were
+                    // a source tree node for the purposes of the checker.
+                    var name = ts.getMutableClone(node);
+                    name.flags &= ~8 /* Synthesized */;
+                    name.original = undefined;
+                    name.parent = ts.getParseTreeNode(currentScope); // ensure the parent is set to a parse tree node.
+                    if (useFallback) {
+                        return ts.createLogicalAnd(ts.createStrictInequality(ts.createTypeOf(name), ts.createLiteral("undefined")), name);
+                    }
+                    return name;
+                case 146 /* QualifiedName */:
+                    return serializeQualifiedNameAsExpression(node, useFallback);
+            }
+        }
+        /**
+         * Serializes an qualified name as an expression for decorator type metadata.
+         *
+         * @param node The qualified name to serialize.
+         * @param useFallback A value indicating whether to use logical operators to test for the
+         *                    qualified name at runtime.
+         */
+        function serializeQualifiedNameAsExpression(node, useFallback) {
+            var left;
+            if (node.left.kind === 71 /* Identifier */) {
+                left = serializeEntityNameAsExpression(node.left, useFallback);
+            }
+            else if (useFallback) {
+                var temp = ts.createTempVariable(hoistVariableDeclaration);
+                left = ts.createLogicalAnd(ts.createAssignment(temp, serializeEntityNameAsExpression(node.left, /*useFallback*/ true)), temp);
+            }
+            else {
+                left = serializeEntityNameAsExpression(node.left, /*useFallback*/ false);
+            }
+            return ts.createPropertyAccess(left, node.right);
+        }
+        /**
+         * Gets an expression that points to the global "Symbol" constructor at runtime if it is
+         * available.
+         */
+        function getGlobalSymbolNameWithFallback() {
+            return ts.createConditional(ts.createTypeCheck(ts.createIdentifier("Symbol"), "function"), ts.createIdentifier("Symbol"), ts.createIdentifier("Object"));
+        }
+        /**
+         * A simple inlinable expression is an expression which can be copied into multiple locations
+         * without risk of repeating any sideeffects and whose value could not possibly change between
+         * any such locations
+         */
+        function isSimpleInlineableExpression(expression) {
+            return !ts.isIdentifier(expression) && ts.isSimpleCopiableExpression(expression) ||
+                ts.isWellKnownSymbolSyntactically(expression);
+        }
+        /**
+         * Gets an expression that represents a property name. For a computed property, a
+         * name is generated for the node.
+         *
+         * @param member The member whose name should be converted into an expression.
+         */
+        function getExpressionForPropertyName(member, generateNameForComputedPropertyName) {
+            var name = member.name;
+            if (ts.isComputedPropertyName(name)) {
+                return generateNameForComputedPropertyName && !isSimpleInlineableExpression(name.expression)
+                    ? ts.getGeneratedNameForNode(name)
+                    : name.expression;
+            }
+            else if (ts.isIdentifier(name)) {
+                return ts.createLiteral(ts.idText(name));
+            }
+            else {
+                return ts.getSynthesizedClone(name);
+            }
+        }
+        /**
+         * If the name is a computed property, this function transforms it, then either returns an expression which caches the
+         * value of the result or the expression itself if the value is either unused or safe to inline into multiple locations
+         * @param shouldHoist Does the expression need to be reused? (ie, for an initializer or a decorator)
+         * @param omitSimple Should expressions with no observable side-effects be elided? (ie, the expression is not hoisted for a decorator or initializer and is a literal)
+         */
+        function getPropertyNameExpressionIfNeeded(name, shouldHoist, omitSimple) {
+            if (ts.isComputedPropertyName(name)) {
+                var expression = ts.visitNode(name.expression, visitor, ts.isExpression);
+                var innerExpression = ts.skipPartiallyEmittedExpressions(expression);
+                var inlinable = isSimpleInlineableExpression(innerExpression);
+                if (!inlinable && shouldHoist) {
+                    var generatedName = ts.getGeneratedNameForNode(name);
+                    hoistVariableDeclaration(generatedName);
+                    return ts.createAssignment(generatedName, expression);
+                }
+                return (omitSimple && (inlinable || ts.isIdentifier(innerExpression))) ? undefined : expression;
+            }
+        }
+        /**
+         * Visits the property name of a class element, for use when emitting property
+         * initializers. For a computed property on a node with decorators, a temporary
+         * value is stored for later use.
+         *
+         * @param member The member whose name should be visited.
+         */
+        function visitPropertyNameOfClassElement(member) {
+            var name = member.name;
+            var expr = getPropertyNameExpressionIfNeeded(name, ts.some(member.decorators), /*omitSimple*/ false);
+            if (expr) { // expr only exists if `name` is a computed property name
+                // Inline any pending expressions from previous elided or relocated computed property name expressions in order to preserve execution order
+                if (ts.some(pendingExpressions)) {
+                    expr = ts.inlineExpressions(pendingExpressions.concat([expr]));
+                    pendingExpressions.length = 0;
+                }
+                return ts.updateComputedPropertyName(name, expr);
+            }
+            else {
+                return name;
+            }
+        }
+        /**
+         * Transforms a HeritageClause with TypeScript syntax.
+         *
+         * This function will only be called when one of the following conditions are met:
+         * - The node is a non-`extends` heritage clause that should be elided.
+         * - The node is an `extends` heritage clause that should be visited, but only allow a single type.
+         *
+         * @param node The HeritageClause to transform.
+         */
+        function visitHeritageClause(node) {
+            if (node.token === 85 /* ExtendsKeyword */) {
+                var types = ts.visitNodes(node.types, visitor, ts.isExpressionWithTypeArguments, 0, 1);
+                return ts.setTextRange(ts.createHeritageClause(85 /* ExtendsKeyword */, types), node);
+            }
+            return undefined;
+        }
+        /**
+         * Transforms an ExpressionWithTypeArguments with TypeScript syntax.
+         *
+         * This function will only be called when one of the following conditions are met:
+         * - The node contains type arguments that should be elided.
+         *
+         * @param node The ExpressionWithTypeArguments to transform.
+         */
+        function visitExpressionWithTypeArguments(node) {
+            return ts.updateExpressionWithTypeArguments(node, 
+            /*typeArguments*/ undefined, ts.visitNode(node.expression, visitor, ts.isLeftHandSideExpression));
+        }
+        /**
+         * Determines whether to emit a function-like declaration. We should not emit the
+         * declaration if it does not have a body.
+         *
+         * @param node The declaration node.
+         */
+        function shouldEmitFunctionLikeDeclaration(node) {
+            return !ts.nodeIsMissing(node.body);
+        }
+        function visitPropertyDeclaration(node) {
+            var expr = getPropertyNameExpressionIfNeeded(node.name, ts.some(node.decorators) || !!node.initializer, /*omitSimple*/ true);
+            if (expr && !isSimpleInlineableExpression(expr)) {
+                (pendingExpressions || (pendingExpressions = [])).push(expr);
+            }
+            return undefined;
+        }
+        function visitConstructor(node) {
+            if (!shouldEmitFunctionLikeDeclaration(node)) {
+                return undefined;
+            }
+            return ts.updateConstructor(node, ts.visitNodes(node.decorators, visitor, ts.isDecorator), ts.visitNodes(node.modifiers, visitor, ts.isModifier), ts.visitParameterList(node.parameters, visitor, context), ts.visitFunctionBody(node.body, visitor, context));
+        }
+        /**
+         * Visits a method declaration of a class.
+         *
+         * This function will be called when one of the following conditions are met:
+         * - The node is an overload
+         * - The node is marked as abstract, public, private, protected, or readonly
+         * - The node has a computed property name
+         *
+         * @param node The method node.
+         */
+        function visitMethodDeclaration(node) {
+            if (!shouldEmitFunctionLikeDeclaration(node)) {
+                return undefined;
+            }
+            var updated = ts.updateMethod(node, 
+            /*decorators*/ undefined, ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), node.asteriskToken, visitPropertyNameOfClassElement(node), 
+            /*questionToken*/ undefined, 
+            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
+            /*type*/ undefined, ts.visitFunctionBody(node.body, visitor, context));
+            if (updated !== node) {
+                // While we emit the source map for the node after skipping decorators and modifiers,
+                // we need to emit the comments for the original range.
+                ts.setCommentRange(updated, node);
+                ts.setSourceMapRange(updated, ts.moveRangePastDecorators(node));
+            }
+            return updated;
+        }
+        /**
+         * Determines whether to emit an accessor declaration. We should not emit the
+         * declaration if it does not have a body and is abstract.
+         *
+         * @param node The declaration node.
+         */
+        function shouldEmitAccessorDeclaration(node) {
+            return !(ts.nodeIsMissing(node.body) && ts.hasModifier(node, 128 /* Abstract */));
+        }
+        /**
+         * Visits a get accessor declaration of a class.
+         *
+         * This function will be called when one of the following conditions are met:
+         * - The node is marked as abstract, public, private, or protected
+         * - The node has a computed property name
+         *
+         * @param node The get accessor node.
+         */
+        function visitGetAccessor(node) {
+            if (!shouldEmitAccessorDeclaration(node)) {
+                return undefined;
+            }
+            var updated = ts.updateGetAccessor(node, 
+            /*decorators*/ undefined, ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), visitPropertyNameOfClassElement(node), ts.visitParameterList(node.parameters, visitor, context), 
+            /*type*/ undefined, ts.visitFunctionBody(node.body, visitor, context) || ts.createBlock([]));
+            if (updated !== node) {
+                // While we emit the source map for the node after skipping decorators and modifiers,
+                // we need to emit the comments for the original range.
+                ts.setCommentRange(updated, node);
+                ts.setSourceMapRange(updated, ts.moveRangePastDecorators(node));
+            }
+            return updated;
+        }
+        /**
+         * Visits a set accessor declaration of a class.
+         *
+         * This function will be called when one of the following conditions are met:
+         * - The node is marked as abstract, public, private, or protected
+         * - The node has a computed property name
+         *
+         * @param node The set accessor node.
+         */
+        function visitSetAccessor(node) {
+            if (!shouldEmitAccessorDeclaration(node)) {
+                return undefined;
+            }
+            var updated = ts.updateSetAccessor(node, 
+            /*decorators*/ undefined, ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), visitPropertyNameOfClassElement(node), ts.visitParameterList(node.parameters, visitor, context), ts.visitFunctionBody(node.body, visitor, context) || ts.createBlock([]));
+            if (updated !== node) {
+                // While we emit the source map for the node after skipping decorators and modifiers,
+                // we need to emit the comments for the original range.
+                ts.setCommentRange(updated, node);
+                ts.setSourceMapRange(updated, ts.moveRangePastDecorators(node));
+            }
+            return updated;
+        }
+        /**
+         * Visits a function declaration.
+         *
+         * This function will be called when one of the following conditions are met:
+         * - The node is an overload
+         * - The node is exported from a TypeScript namespace
+         * - The node has decorators
+         *
+         * @param node The function node.
+         */
+        function visitFunctionDeclaration(node) {
+            if (!shouldEmitFunctionLikeDeclaration(node)) {
+                return ts.createNotEmittedStatement(node);
+            }
+            var updated = ts.updateFunctionDeclaration(node, 
+            /*decorators*/ undefined, ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), node.asteriskToken, node.name, 
+            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
+            /*type*/ undefined, ts.visitFunctionBody(node.body, visitor, context) || ts.createBlock([]));
+            if (isExportOfNamespace(node)) {
+                var statements = [updated];
+                addExportMemberAssignment(statements, node);
+                return statements;
+            }
+            return updated;
+        }
+        /**
+         * Visits a function expression node.
+         *
+         * This function will be called when one of the following conditions are met:
+         * - The node has type annotations
+         *
+         * @param node The function expression node.
+         */
+        function visitFunctionExpression(node) {
+            if (!shouldEmitFunctionLikeDeclaration(node)) {
+                return ts.createOmittedExpression();
+            }
+            var updated = ts.updateFunctionExpression(node, ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), node.asteriskToken, node.name, 
+            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
+            /*type*/ undefined, ts.visitFunctionBody(node.body, visitor, context) || ts.createBlock([]));
+            return updated;
+        }
+        /**
+         * @remarks
+         * This function will be called when one of the following conditions are met:
+         * - The node has type annotations
+         */
+        function visitArrowFunction(node) {
+            var updated = ts.updateArrowFunction(node, ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), 
+            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
+            /*type*/ undefined, node.equalsGreaterThanToken, ts.visitFunctionBody(node.body, visitor, context));
+            return updated;
+        }
+        /**
+         * Visits a parameter declaration node.
+         *
+         * This function will be called when one of the following conditions are met:
+         * - The node has an accessibility modifier.
+         * - The node has a questionToken.
+         * - The node's kind is ThisKeyword.
+         *
+         * @param node The parameter declaration node.
+         */
+        function visitParameter(node) {
+            if (ts.parameterIsThisKeyword(node)) {
+                return undefined;
+            }
+            var parameter = ts.createParameter(
+            /*decorators*/ undefined, 
+            /*modifiers*/ undefined, node.dotDotDotToken, ts.visitNode(node.name, visitor, ts.isBindingName), 
+            /*questionToken*/ undefined, 
+            /*type*/ undefined, ts.visitNode(node.initializer, visitor, ts.isExpression));
+            // While we emit the source map for the node after skipping decorators and modifiers,
+            // we need to emit the comments for the original range.
+            ts.setOriginalNode(parameter, node);
+            ts.setTextRange(parameter, ts.moveRangePastModifiers(node));
+            ts.setCommentRange(parameter, node);
+            ts.setSourceMapRange(parameter, ts.moveRangePastModifiers(node));
+            ts.setEmitFlags(parameter.name, 32 /* NoTrailingSourceMap */);
+            return parameter;
+        }
+        /**
+         * Visits a variable statement in a namespace.
+         *
+         * This function will be called when one of the following conditions are met:
+         * - The node is exported from a TypeScript namespace.
+         */
+        function visitVariableStatement(node) {
+            if (isExportOfNamespace(node)) {
+                var variables = ts.getInitializedVariables(node.declarationList);
+                if (variables.length === 0) {
+                    // elide statement if there are no initialized variables.
+                    return undefined;
+                }
+                return ts.setTextRange(ts.createStatement(ts.inlineExpressions(ts.map(variables, transformInitializedVariable))), node);
+            }
+            else {
+                return ts.visitEachChild(node, visitor, context);
+            }
+        }
+        function transformInitializedVariable(node) {
+            var name = node.name;
+            if (ts.isBindingPattern(name)) {
+                return ts.flattenDestructuringAssignment(node, visitor, context, 0 /* All */, 
+                /*needsValue*/ false, createNamespaceExportExpression);
+            }
+            else {
+                return ts.setTextRange(ts.createAssignment(getNamespaceMemberNameWithSourceMapsAndWithoutComments(name), ts.visitNode(node.initializer, visitor, ts.isExpression)), 
+                /*location*/ node);
+            }
+        }
+        function visitVariableDeclaration(node) {
+            return ts.updateVariableDeclaration(node, ts.visitNode(node.name, visitor, ts.isBindingName), 
+            /*type*/ undefined, ts.visitNode(node.initializer, visitor, ts.isExpression));
+        }
+        /**
+         * Visits a parenthesized expression that contains either a type assertion or an `as`
+         * expression.
+         *
+         * @param node The parenthesized expression node.
+         */
+        function visitParenthesizedExpression(node) {
+            var innerExpression = ts.skipOuterExpressions(node.expression, ~2 /* Assertions */);
+            if (ts.isAssertionExpression(innerExpression)) {
+                // Make sure we consider all nested cast expressions, e.g.:
+                // (<any><number><any>-A).x;
+                var expression = ts.visitNode(node.expression, visitor, ts.isExpression);
+                // We have an expression of the form: (<Type>SubExpr). Emitting this as (SubExpr)
+                // is really not desirable. We would like to emit the subexpression as-is. Omitting
+                // the parentheses, however, could cause change in the semantics of the generated
+                // code if the casted expression has a lower precedence than the rest of the
+                // expression.
+                //
+                // To preserve comments, we return a "PartiallyEmittedExpression" here which will
+                // preserve the position information of the original expression.
+                //
+                // Due to the auto-parenthesization rules used by the visitor and factory functions
+                // we can safely elide the parentheses here, as a new synthetic
+                // ParenthesizedExpression will be inserted if we remove parentheses too
+                // aggressively.
+                // HOWEVER - if there are leading comments on the expression itself, to handle ASI
+                // correctly for return and throw, we must keep the parenthesis
+                if (ts.length(ts.getLeadingCommentRangesOfNode(expression, currentSourceFile))) {
+                    return ts.updateParen(node, expression);
+                }
+                return ts.createPartiallyEmittedExpression(expression, node);
+            }
+            return ts.visitEachChild(node, visitor, context);
+        }
+        function visitAssertionExpression(node) {
+            var expression = ts.visitNode(node.expression, visitor, ts.isExpression);
+            return ts.createPartiallyEmittedExpression(expression, node);
+        }
+        function visitNonNullExpression(node) {
+            var expression = ts.visitNode(node.expression, visitor, ts.isLeftHandSideExpression);
+            return ts.createPartiallyEmittedExpression(expression, node);
+        }
+        function visitCallExpression(node) {
+            return ts.updateCall(node, ts.visitNode(node.expression, visitor, ts.isExpression), 
+            /*typeArguments*/ undefined, ts.visitNodes(node.arguments, visitor, ts.isExpression));
+        }
+        function visitNewExpression(node) {
+            return ts.updateNew(node, ts.visitNode(node.expression, visitor, ts.isExpression), 
+            /*typeArguments*/ undefined, ts.visitNodes(node.arguments, visitor, ts.isExpression));
+        }
+        function visitTaggedTemplateExpression(node) {
+            return ts.updateTaggedTemplate(node, ts.visitNode(node.tag, visitor, ts.isExpression), 
+            /*typeArguments*/ undefined, ts.visitNode(node.template, visitor, ts.isExpression));
+        }
+        /**
+         * Determines whether to emit an enum declaration.
+         *
+         * @param node The enum declaration node.
+         */
+        function shouldEmitEnumDeclaration(node) {
+            return !ts.isConst(node)
+                || compilerOptions.preserveConstEnums
+                || compilerOptions.isolatedModules;
+        }
+        /**
+         * Visits an enum declaration.
+         *
+         * This function will be called any time a TypeScript enum is encountered.
+         *
+         * @param node The enum declaration node.
+         */
+        function visitEnumDeclaration(node) {
+            if (!shouldEmitEnumDeclaration(node)) {
+                return undefined;
+            }
+            var statements = [];
+            // We request to be advised when the printer is about to print this node. This allows
+            // us to set up the correct state for later substitutions.
+            var emitFlags = 2 /* AdviseOnEmitNode */;
+            // If needed, we should emit a variable declaration for the enum. If we emit
+            // a leading variable declaration, we should not emit leading comments for the
+            // enum body.
+            if (addVarForEnumOrModuleDeclaration(statements, node)) {
+                // We should still emit the comments if we are emitting a system module.
+                if (moduleKind !== ts.ModuleKind.System || currentScope !== currentSourceFile) {
+                    emitFlags |= 512 /* NoLeadingComments */;
+                }
+            }
+            // `parameterName` is the declaration name used inside of the enum.
+            var parameterName = getNamespaceParameterName(node);
+            // `containerName` is the expression used inside of the enum for assignments.
+            var containerName = getNamespaceContainerName(node);
+            // `exportName` is the expression used within this node's container for any exported references.
+            var exportName = ts.hasModifier(node, 1 /* Export */)
+                ? ts.getExternalModuleOrNamespaceExportName(currentNamespaceContainerName, node, /*allowComments*/ false, /*allowSourceMaps*/ true)
+                : ts.getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ true);
+            //  x || (x = {})
+            //  exports.x || (exports.x = {})
+            var moduleArg = ts.createLogicalOr(exportName, ts.createAssignment(exportName, ts.createObjectLiteral()));
+            if (hasNamespaceQualifiedExportName(node)) {
+                // `localName` is the expression used within this node's containing scope for any local references.
+                var localName = ts.getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ true);
+                //  x = (exports.x || (exports.x = {}))
+                moduleArg = ts.createAssignment(localName, moduleArg);
+            }
+            //  (function (x) {
+            //      x[x["y"] = 0] = "y";
+            //      ...
+            //  })(x || (x = {}));
+            var enumStatement = ts.createStatement(ts.createCall(ts.createFunctionExpression(
+            /*modifiers*/ undefined, 
+            /*asteriskToken*/ undefined, 
+            /*name*/ undefined, 
+            /*typeParameters*/ undefined, [ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, parameterName)], 
+            /*type*/ undefined, transformEnumBody(node, containerName)), 
+            /*typeArguments*/ undefined, [moduleArg]));
+            ts.setOriginalNode(enumStatement, node);
+            ts.setTextRange(enumStatement, node);
+            ts.setEmitFlags(enumStatement, emitFlags);
+            statements.push(enumStatement);
+            // Add a DeclarationMarker for the enum to preserve trailing comments and mark
+            // the end of the declaration.
+            statements.push(ts.createEndOfDeclarationMarker(node));
+            return statements;
+        }
+        /**
+         * Transforms the body of an enum declaration.
+         *
+         * @param node The enum declaration node.
+         */
+        function transformEnumBody(node, localName) {
+            var savedCurrentNamespaceLocalName = currentNamespaceContainerName;
+            currentNamespaceContainerName = localName;
+            var statements = [];
+            startLexicalEnvironment();
+            var members = ts.map(node.members, transformEnumMember);
+            ts.prependStatements(statements, endLexicalEnvironment());
+            ts.addRange(statements, members);
+            currentNamespaceContainerName = savedCurrentNamespaceLocalName;
+            return ts.createBlock(ts.setTextRange(ts.createNodeArray(statements), /*location*/ node.members), 
+            /*multiLine*/ true);
+        }
+        /**
+         * Transforms an enum member into a statement.
+         *
+         * @param member The enum member node.
+         */
+        function transformEnumMember(member) {
+            // enums don't support computed properties
+            // we pass false as 'generateNameForComputedPropertyName' for a backward compatibility purposes
+            // old emitter always generate 'expression' part of the name as-is.
+            var name = getExpressionForPropertyName(member, /*generateNameForComputedPropertyName*/ false);
+            var valueExpression = transformEnumMemberDeclarationValue(member);
+            var innerAssignment = ts.createAssignment(ts.createElementAccess(currentNamespaceContainerName, name), valueExpression);
+            var outerAssignment = valueExpression.kind === 9 /* StringLiteral */ ?
+                innerAssignment :
+                ts.createAssignment(ts.createElementAccess(currentNamespaceContainerName, innerAssignment), name);
+            return ts.setTextRange(ts.createStatement(ts.setTextRange(outerAssignment, member)), member);
+        }
+        /**
+         * Transforms the value of an enum member.
+         *
+         * @param member The enum member node.
+         */
+        function transformEnumMemberDeclarationValue(member) {
+            var value = resolver.getConstantValue(member);
+            if (value !== undefined) {
+                return ts.createLiteral(value);
+            }
+            else {
+                enableSubstitutionForNonQualifiedEnumMembers();
+                if (member.initializer) {
+                    return ts.visitNode(member.initializer, visitor, ts.isExpression);
+                }
+                else {
+                    return ts.createVoidZero();
+                }
+            }
+        }
+        /**
+         * Determines whether to elide a module declaration.
+         *
+         * @param node The module declaration node.
+         */
+        function shouldEmitModuleDeclaration(node) {
+            return ts.isInstantiatedModule(node, !!compilerOptions.preserveConstEnums || !!compilerOptions.isolatedModules);
+        }
+        /**
+         * Determines whether an exported declaration will have a qualified export name (e.g. `f.x`
+         * or `exports.x`).
+         */
+        function hasNamespaceQualifiedExportName(node) {
+            return isExportOfNamespace(node)
+                || (isExternalModuleExport(node)
+                    && moduleKind !== ts.ModuleKind.ES2015
+                    && moduleKind !== ts.ModuleKind.ESNext
+                    && moduleKind !== ts.ModuleKind.System);
+        }
+        /**
+         * Records that a declaration was emitted in the current scope, if it was the first
+         * declaration for the provided symbol.
+         */
+        function recordEmittedDeclarationInScope(node) {
+            if (!currentScopeFirstDeclarationsOfName) {
+                currentScopeFirstDeclarationsOfName = ts.createUnderscoreEscapedMap();
+            }
+            var name = declaredNameInScope(node);
+            if (!currentScopeFirstDeclarationsOfName.has(name)) {
+                currentScopeFirstDeclarationsOfName.set(name, node);
+            }
+        }
+        /**
+         * Determines whether a declaration is the first declaration with
+         * the same name emitted in the current scope.
+         */
+        function isFirstEmittedDeclarationInScope(node) {
+            if (currentScopeFirstDeclarationsOfName) {
+                var name = declaredNameInScope(node);
+                return currentScopeFirstDeclarationsOfName.get(name) === node;
+            }
+            return true;
+        }
+        function declaredNameInScope(node) {
+            ts.Debug.assertNode(node.name, ts.isIdentifier);
+            return node.name.escapedText;
+        }
+        /**
+         * Adds a leading VariableStatement for a enum or module declaration.
+         */
+        function addVarForEnumOrModuleDeclaration(statements, node) {
+            // Emit a variable statement for the module. We emit top-level enums as a `var`
+            // declaration to avoid static errors in global scripts scripts due to redeclaration.
+            // enums in any other scope are emitted as a `let` declaration.
+            var statement = ts.createVariableStatement(ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), ts.createVariableDeclarationList([
+                ts.createVariableDeclaration(ts.getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ true))
+            ], currentScope.kind === 274 /* SourceFile */ ? 0 /* None */ : 1 /* Let */));
+            ts.setOriginalNode(statement, node);
+            recordEmittedDeclarationInScope(node);
+            if (isFirstEmittedDeclarationInScope(node)) {
+                // Adjust the source map emit to match the old emitter.
+                if (node.kind === 238 /* EnumDeclaration */) {
+                    ts.setSourceMapRange(statement.declarationList, node);
+                }
+                else {
+                    ts.setSourceMapRange(statement, node);
+                }
+                // Trailing comments for module declaration should be emitted after the function closure
+                // instead of the variable statement:
+                //
+                //     /** Module comment*/
+                //     module m1 {
+                //         function foo4Export() {
+                //         }
+                //     } // trailing comment module
+                //
+                // Should emit:
+                //
+                //     /** Module comment*/
+                //     var m1;
+                //     (function (m1) {
+                //         function foo4Export() {
+                //         }
+                //     })(m1 || (m1 = {})); // trailing comment module
+                //
+                ts.setCommentRange(statement, node);
+                ts.setEmitFlags(statement, 1024 /* NoTrailingComments */ | 4194304 /* HasEndOfDeclarationMarker */);
+                statements.push(statement);
+                return true;
+            }
+            else {
+                // For an EnumDeclaration or ModuleDeclaration that merges with a preceeding
+                // declaration we do not emit a leading variable declaration. To preserve the
+                // begin/end semantics of the declararation and to properly handle exports
+                // we wrap the leading variable declaration in a `MergeDeclarationMarker`.
+                var mergeMarker = ts.createMergeDeclarationMarker(statement);
+                ts.setEmitFlags(mergeMarker, 1536 /* NoComments */ | 4194304 /* HasEndOfDeclarationMarker */);
+                statements.push(mergeMarker);
+                return false;
+            }
+        }
+        /**
+         * Visits a module declaration node.
+         *
+         * This function will be called any time a TypeScript namespace (ModuleDeclaration) is encountered.
+         *
+         * @param node The module declaration node.
+         */
+        function visitModuleDeclaration(node) {
+            if (!shouldEmitModuleDeclaration(node)) {
+                return ts.createNotEmittedStatement(node);
+            }
+            ts.Debug.assertNode(node.name, ts.isIdentifier, "A TypeScript namespace should have an Identifier name.");
+            enableSubstitutionForNamespaceExports();
+            var statements = [];
+            // We request to be advised when the printer is about to print this node. This allows
+            // us to set up the correct state for later substitutions.
+            var emitFlags = 2 /* AdviseOnEmitNode */;
+            // If needed, we should emit a variable declaration for the module. If we emit
+            // a leading variable declaration, we should not emit leading comments for the
+            // module body.
+            if (addVarForEnumOrModuleDeclaration(statements, node)) {
+                // We should still emit the comments if we are emitting a system module.
+                if (moduleKind !== ts.ModuleKind.System || currentScope !== currentSourceFile) {
+                    emitFlags |= 512 /* NoLeadingComments */;
+                }
+            }
+            // `parameterName` is the declaration name used inside of the namespace.
+            var parameterName = getNamespaceParameterName(node);
+            // `containerName` is the expression used inside of the namespace for exports.
+            var containerName = getNamespaceContainerName(node);
+            // `exportName` is the expression used within this node's container for any exported references.
+            var exportName = ts.hasModifier(node, 1 /* Export */)
+                ? ts.getExternalModuleOrNamespaceExportName(currentNamespaceContainerName, node, /*allowComments*/ false, /*allowSourceMaps*/ true)
+                : ts.getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ true);
+            //  x || (x = {})
+            //  exports.x || (exports.x = {})
+            var moduleArg = ts.createLogicalOr(exportName, ts.createAssignment(exportName, ts.createObjectLiteral()));
+            if (hasNamespaceQualifiedExportName(node)) {
+                // `localName` is the expression used within this node's containing scope for any local references.
+                var localName = ts.getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ true);
+                //  x = (exports.x || (exports.x = {}))
+                moduleArg = ts.createAssignment(localName, moduleArg);
+            }
+            //  (function (x_1) {
+            //      x_1.y = ...;
+            //  })(x || (x = {}));
+            var moduleStatement = ts.createStatement(ts.createCall(ts.createFunctionExpression(
+            /*modifiers*/ undefined, 
+            /*asteriskToken*/ undefined, 
+            /*name*/ undefined, 
+            /*typeParameters*/ undefined, [ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, parameterName)], 
+            /*type*/ undefined, transformModuleBody(node, containerName)), 
+            /*typeArguments*/ undefined, [moduleArg]));
+            ts.setOriginalNode(moduleStatement, node);
+            ts.setTextRange(moduleStatement, node);
+            ts.setEmitFlags(moduleStatement, emitFlags);
+            statements.push(moduleStatement);
+            // Add a DeclarationMarker for the namespace to preserve trailing comments and mark
+            // the end of the declaration.
+            statements.push(ts.createEndOfDeclarationMarker(node));
+            return statements;
+        }
+        /**
+         * Transforms the body of a module declaration.
+         *
+         * @param node The module declaration node.
+         */
+        function transformModuleBody(node, namespaceLocalName) {
+            var savedCurrentNamespaceContainerName = currentNamespaceContainerName;
+            var savedCurrentNamespace = currentNamespace;
+            var savedCurrentScopeFirstDeclarationsOfName = currentScopeFirstDeclarationsOfName;
+            currentNamespaceContainerName = namespaceLocalName;
+            currentNamespace = node;
+            currentScopeFirstDeclarationsOfName = undefined;
+            var statements = [];
+            startLexicalEnvironment();
+            var statementsLocation;
+            var blockLocation;
+            var body = node.body;
+            if (body.kind === 240 /* ModuleBlock */) {
+                saveStateAndInvoke(body, function (body) { return ts.addRange(statements, ts.visitNodes(body.statements, namespaceElementVisitor, ts.isStatement)); });
+                statementsLocation = body.statements;
+                blockLocation = body;
+            }
+            else {
+                var result = visitModuleDeclaration(body);
+                if (result) {
+                    if (ts.isArray(result)) {
+                        ts.addRange(statements, result);
+                    }
+                    else {
+                        statements.push(result);
+                    }
+                }
+                var moduleBlock = getInnerMostModuleDeclarationFromDottedModule(node).body;
+                statementsLocation = ts.moveRangePos(moduleBlock.statements, -1);
+            }
+            ts.prependStatements(statements, endLexicalEnvironment());
+            currentNamespaceContainerName = savedCurrentNamespaceContainerName;
+            currentNamespace = savedCurrentNamespace;
+            currentScopeFirstDeclarationsOfName = savedCurrentScopeFirstDeclarationsOfName;
+            var block = ts.createBlock(ts.setTextRange(ts.createNodeArray(statements), 
+            /*location*/ statementsLocation), 
+            /*multiLine*/ true);
+            ts.setTextRange(block, blockLocation);
+            // namespace hello.hi.world {
+            //      function foo() {}
+            //
+            //      // TODO, blah
+            // }
+            //
+            // should be emitted as
+            //
+            // var hello;
+            // (function (hello) {
+            //     var hi;
+            //     (function (hi) {
+            //         var world;
+            //         (function (world) {
+            //             function foo() { }
+            //             // TODO, blah
+            //         })(world = hi.world || (hi.world = {}));
+            //     })(hi = hello.hi || (hello.hi = {}));
+            // })(hello || (hello = {}));
+            // We only want to emit comment on the namespace which contains block body itself, not the containing namespaces.
+            if (body.kind !== 240 /* ModuleBlock */) {
+                ts.setEmitFlags(block, ts.getEmitFlags(block) | 1536 /* NoComments */);
+            }
+            return block;
+        }
+        function getInnerMostModuleDeclarationFromDottedModule(moduleDeclaration) {
+            if (moduleDeclaration.body.kind === 239 /* ModuleDeclaration */) {
+                var recursiveInnerModule = getInnerMostModuleDeclarationFromDottedModule(moduleDeclaration.body);
+                return recursiveInnerModule || moduleDeclaration.body;
+            }
+        }
+        /**
+         * Visits an import declaration, eliding it if it is not referenced.
+         *
+         * @param node The import declaration node.
+         */
+        function visitImportDeclaration(node) {
+            if (!node.importClause) {
+                // Do not elide a side-effect only import declaration.
+                //  import "foo";
+                return node;
+            }
+            // Elide the declaration if the import clause was elided.
+            var importClause = ts.visitNode(node.importClause, visitImportClause, ts.isImportClause);
+            return importClause
+                ? ts.updateImportDeclaration(node, 
+                /*decorators*/ undefined, 
+                /*modifiers*/ undefined, importClause, node.moduleSpecifier)
+                : undefined;
+        }
+        /**
+         * Visits an import clause, eliding it if it is not referenced.
+         *
+         * @param node The import clause node.
+         */
+        function visitImportClause(node) {
+            // Elide the import clause if we elide both its name and its named bindings.
+            var name = resolver.isReferencedAliasDeclaration(node) ? node.name : undefined;
+            var namedBindings = ts.visitNode(node.namedBindings, visitNamedImportBindings, ts.isNamedImportBindings);
+            return (name || namedBindings) ? ts.updateImportClause(node, name, namedBindings) : undefined;
+        }
+        /**
+         * Visits named import bindings, eliding it if it is not referenced.
+         *
+         * @param node The named import bindings node.
+         */
+        function visitNamedImportBindings(node) {
+            if (node.kind === 246 /* NamespaceImport */) {
+                // Elide a namespace import if it is not referenced.
+                return resolver.isReferencedAliasDeclaration(node) ? node : undefined;
+            }
+            else {
+                // Elide named imports if all of its import specifiers are elided.
+                var elements = ts.visitNodes(node.elements, visitImportSpecifier, ts.isImportSpecifier);
+                return ts.some(elements) ? ts.updateNamedImports(node, elements) : undefined;
+            }
+        }
+        /**
+         * Visits an import specifier, eliding it if it is not referenced.
+         *
+         * @param node The import specifier node.
+         */
+        function visitImportSpecifier(node) {
+            // Elide an import specifier if it is not referenced.
+            return resolver.isReferencedAliasDeclaration(node) ? node : undefined;
+        }
+        /**
+         * Visits an export assignment, eliding it if it does not contain a clause that resolves
+         * to a value.
+         *
+         * @param node The export assignment node.
+         */
+        function visitExportAssignment(node) {
+            // Elide the export assignment if it does not reference a value.
+            return resolver.isValueAliasDeclaration(node)
+                ? ts.visitEachChild(node, visitor, context)
+                : undefined;
+        }
+        /**
+         * Visits an export declaration, eliding it if it does not contain a clause that resolves
+         * to a value.
+         *
+         * @param node The export declaration node.
+         */
+        function visitExportDeclaration(node) {
+            if (!node.exportClause) {
+                // Elide a star export if the module it references does not export a value.
+                return compilerOptions.isolatedModules || resolver.moduleExportsSomeValue(node.moduleSpecifier) ? node : undefined;
+            }
+            if (!resolver.isValueAliasDeclaration(node)) {
+                // Elide the export declaration if it does not export a value.
+                return undefined;
+            }
+            // Elide the export declaration if all of its named exports are elided.
+            var exportClause = ts.visitNode(node.exportClause, visitNamedExports, ts.isNamedExports);
+            return exportClause
+                ? ts.updateExportDeclaration(node, 
+                /*decorators*/ undefined, 
+                /*modifiers*/ undefined, exportClause, node.moduleSpecifier)
+                : undefined;
+        }
+        /**
+         * Visits named exports, eliding it if it does not contain an export specifier that
+         * resolves to a value.
+         *
+         * @param node The named exports node.
+         */
+        function visitNamedExports(node) {
+            // Elide the named exports if all of its export specifiers were elided.
+            var elements = ts.visitNodes(node.elements, visitExportSpecifier, ts.isExportSpecifier);
+            return ts.some(elements) ? ts.updateNamedExports(node, elements) : undefined;
+        }
+        /**
+         * Visits an export specifier, eliding it if it does not resolve to a value.
+         *
+         * @param node The export specifier node.
+         */
+        function visitExportSpecifier(node) {
+            // Elide an export specifier if it does not reference a value.
+            return resolver.isValueAliasDeclaration(node) ? node : undefined;
+        }
+        /**
+         * Determines whether to emit an import equals declaration.
+         *
+         * @param node The import equals declaration node.
+         */
+        function shouldEmitImportEqualsDeclaration(node) {
+            // preserve old compiler's behavior: emit 'var' for import declaration (even if we do not consider them referenced) when
+            // - current file is not external module
+            // - import declaration is top level and target is value imported by entity name
+            return resolver.isReferencedAliasDeclaration(node)
+                || (!ts.isExternalModule(currentSourceFile)
+                    && resolver.isTopLevelValueImportEqualsWithEntityName(node));
+        }
+        /**
+         * Visits an import equals declaration.
+         *
+         * @param node The import equals declaration node.
+         */
+        function visitImportEqualsDeclaration(node) {
+            if (ts.isExternalModuleImportEqualsDeclaration(node)) {
+                // Elide external module `import=` if it is not referenced.
+                return resolver.isReferencedAliasDeclaration(node)
+                    ? ts.visitEachChild(node, visitor, context)
+                    : undefined;
+            }
+            if (!shouldEmitImportEqualsDeclaration(node)) {
+                return undefined;
+            }
+            var moduleReference = ts.createExpressionFromEntityName(node.moduleReference);
+            ts.setEmitFlags(moduleReference, 1536 /* NoComments */ | 2048 /* NoNestedComments */);
+            if (isNamedExternalModuleExport(node) || !isExportOfNamespace(node)) {
+                //  export var ${name} = ${moduleReference};
+                //  var ${name} = ${moduleReference};
+                return ts.setOriginalNode(ts.setTextRange(ts.createVariableStatement(ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), ts.createVariableDeclarationList([
+                    ts.setOriginalNode(ts.createVariableDeclaration(node.name, 
+                    /*type*/ undefined, moduleReference), node)
+                ])), node), node);
+            }
+            else {
+                // exports.${name} = ${moduleReference};
+                return ts.setOriginalNode(createNamespaceExport(node.name, moduleReference, node), node);
+            }
+        }
+        /**
+         * Gets a value indicating whether the node is exported from a namespace.
+         *
+         * @param node The node to test.
+         */
+        function isExportOfNamespace(node) {
+            return currentNamespace !== undefined && ts.hasModifier(node, 1 /* Export */);
+        }
+        /**
+         * Gets a value indicating whether the node is exported from an external module.
+         *
+         * @param node The node to test.
+         */
+        function isExternalModuleExport(node) {
+            return currentNamespace === undefined && ts.hasModifier(node, 1 /* Export */);
+        }
+        /**
+         * Gets a value indicating whether the node is a named export from an external module.
+         *
+         * @param node The node to test.
+         */
+        function isNamedExternalModuleExport(node) {
+            return isExternalModuleExport(node)
+                && !ts.hasModifier(node, 512 /* Default */);
+        }
+        /**
+         * Gets a value indicating whether the node is the default export of an external module.
+         *
+         * @param node The node to test.
+         */
+        function isDefaultExternalModuleExport(node) {
+            return isExternalModuleExport(node)
+                && ts.hasModifier(node, 512 /* Default */);
+        }
+        /**
+         * Creates a statement for the provided expression. This is used in calls to `map`.
+         */
+        function expressionToStatement(expression) {
+            return ts.createStatement(expression);
+        }
+        function addExportMemberAssignment(statements, node) {
+            var expression = ts.createAssignment(ts.getExternalModuleOrNamespaceExportName(currentNamespaceContainerName, node, /*allowComments*/ false, /*allowSourceMaps*/ true), ts.getLocalName(node));
+            ts.setSourceMapRange(expression, ts.createRange(node.name ? node.name.pos : node.pos, node.end));
+            var statement = ts.createStatement(expression);
+            ts.setSourceMapRange(statement, ts.createRange(-1, node.end));
+            statements.push(statement);
+        }
+        function createNamespaceExport(exportName, exportValue, location) {
+            return ts.setTextRange(ts.createStatement(ts.createAssignment(ts.getNamespaceMemberName(currentNamespaceContainerName, exportName, /*allowComments*/ false, /*allowSourceMaps*/ true), exportValue)), location);
+        }
+        function createNamespaceExportExpression(exportName, exportValue, location) {
+            return ts.setTextRange(ts.createAssignment(getNamespaceMemberNameWithSourceMapsAndWithoutComments(exportName), exportValue), location);
+        }
+        function getNamespaceMemberNameWithSourceMapsAndWithoutComments(name) {
+            return ts.getNamespaceMemberName(currentNamespaceContainerName, name, /*allowComments*/ false, /*allowSourceMaps*/ true);
+        }
+        /**
+         * Gets the declaration name used inside of a namespace or enum.
+         */
+        function getNamespaceParameterName(node) {
+            var name = ts.getGeneratedNameForNode(node);
+            ts.setSourceMapRange(name, node.name);
+            return name;
+        }
+        /**
+         * Gets the expression used to refer to a namespace or enum within the body
+         * of its declaration.
+         */
+        function getNamespaceContainerName(node) {
+            return ts.getGeneratedNameForNode(node);
+        }
+        /**
+         * Gets a local alias for a class declaration if it is a decorated class with an internal
+         * reference to the static side of the class. This is necessary to avoid issues with
+         * double-binding semantics for the class name.
+         */
+        function getClassAliasIfNeeded(node) {
+            if (resolver.getNodeCheckFlags(node) & 8388608 /* ClassWithConstructorReference */) {
+                enableSubstitutionForClassAliases();
+                var classAlias = ts.createUniqueName(node.name && !ts.isGeneratedIdentifier(node.name) ? ts.idText(node.name) : "default");
+                classAliases[ts.getOriginalNodeId(node)] = classAlias;
+                hoistVariableDeclaration(classAlias);
+                return classAlias;
+            }
+        }
+        function getClassPrototype(node) {
+            return ts.createPropertyAccess(ts.getDeclarationName(node), "prototype");
+        }
+        function getClassMemberPrefix(node, member) {
+            return ts.hasModifier(member, 32 /* Static */)
+                ? ts.getDeclarationName(node)
+                : getClassPrototype(node);
+        }
+        function enableSubstitutionForNonQualifiedEnumMembers() {
+            if ((enabledSubstitutions & 8 /* NonQualifiedEnumMembers */) === 0) {
+                enabledSubstitutions |= 8 /* NonQualifiedEnumMembers */;
+                context.enableSubstitution(71 /* Identifier */);
+            }
+        }
+        function enableSubstitutionForClassAliases() {
+            if ((enabledSubstitutions & 1 /* ClassAliases */) === 0) {
+                enabledSubstitutions |= 1 /* ClassAliases */;
+                // We need to enable substitutions for identifiers. This allows us to
+                // substitute class names inside of a class declaration.
+                context.enableSubstitution(71 /* Identifier */);
+                // Keep track of class aliases.
+                classAliases = [];
+            }
+        }
+        function enableSubstitutionForNamespaceExports() {
+            if ((enabledSubstitutions & 2 /* NamespaceExports */) === 0) {
+                enabledSubstitutions |= 2 /* NamespaceExports */;
+                // We need to enable substitutions for identifiers and shorthand property assignments. This allows us to
+                // substitute the names of exported members of a namespace.
+                context.enableSubstitution(71 /* Identifier */);
+                context.enableSubstitution(271 /* ShorthandPropertyAssignment */);
+                // We need to be notified when entering and exiting namespaces.
+                context.enableEmitNotification(239 /* ModuleDeclaration */);
+            }
+        }
+        function isTransformedModuleDeclaration(node) {
+            return ts.getOriginalNode(node).kind === 239 /* ModuleDeclaration */;
+        }
+        function isTransformedEnumDeclaration(node) {
+            return ts.getOriginalNode(node).kind === 238 /* EnumDeclaration */;
+        }
+        /**
+         * Hook for node emit.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to emit.
+         * @param emit A callback used to emit the node in the printer.
+         */
+        function onEmitNode(hint, node, emitCallback) {
+            var savedApplicableSubstitutions = applicableSubstitutions;
+            var savedCurrentSourceFile = currentSourceFile;
+            if (ts.isSourceFile(node)) {
+                currentSourceFile = node;
+            }
+            if (enabledSubstitutions & 2 /* NamespaceExports */ && isTransformedModuleDeclaration(node)) {
+                applicableSubstitutions |= 2 /* NamespaceExports */;
+            }
+            if (enabledSubstitutions & 8 /* NonQualifiedEnumMembers */ && isTransformedEnumDeclaration(node)) {
+                applicableSubstitutions |= 8 /* NonQualifiedEnumMembers */;
+            }
+            previousOnEmitNode(hint, node, emitCallback);
+            applicableSubstitutions = savedApplicableSubstitutions;
+            currentSourceFile = savedCurrentSourceFile;
+        }
+        /**
+         * Hooks node substitutions.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to substitute.
+         */
+        function onSubstituteNode(hint, node) {
+            node = previousOnSubstituteNode(hint, node);
+            if (hint === 1 /* Expression */) {
+                return substituteExpression(node);
+            }
+            else if (ts.isShorthandPropertyAssignment(node)) {
+                return substituteShorthandPropertyAssignment(node);
+            }
+            return node;
+        }
+        function substituteShorthandPropertyAssignment(node) {
+            if (enabledSubstitutions & 2 /* NamespaceExports */) {
+                var name = node.name;
+                var exportedName = trySubstituteNamespaceExportedName(name);
+                if (exportedName) {
+                    // A shorthand property with an assignment initializer is probably part of a
+                    // destructuring assignment
+                    if (node.objectAssignmentInitializer) {
+                        var initializer = ts.createAssignment(exportedName, node.objectAssignmentInitializer);
+                        return ts.setTextRange(ts.createPropertyAssignment(name, initializer), node);
+                    }
+                    return ts.setTextRange(ts.createPropertyAssignment(name, exportedName), node);
+                }
+            }
+            return node;
+        }
+        function substituteExpression(node) {
+            switch (node.kind) {
+                case 71 /* Identifier */:
+                    return substituteExpressionIdentifier(node);
+                case 185 /* PropertyAccessExpression */:
+                    return substitutePropertyAccessExpression(node);
+                case 186 /* ElementAccessExpression */:
+                    return substituteElementAccessExpression(node);
+            }
+            return node;
+        }
+        function substituteExpressionIdentifier(node) {
+            return trySubstituteClassAlias(node)
+                || trySubstituteNamespaceExportedName(node)
+                || node;
+        }
+        function trySubstituteClassAlias(node) {
+            if (enabledSubstitutions & 1 /* ClassAliases */) {
+                if (resolver.getNodeCheckFlags(node) & 16777216 /* ConstructorReferenceInClass */) {
+                    // Due to the emit for class decorators, any reference to the class from inside of the class body
+                    // must instead be rewritten to point to a temporary variable to avoid issues with the double-bind
+                    // behavior of class names in ES6.
+                    // Also, when emitting statics for class expressions, we must substitute a class alias for
+                    // constructor references in static property initializers.
+                    var declaration = resolver.getReferencedValueDeclaration(node);
+                    if (declaration) {
+                        var classAlias = classAliases[declaration.id]; // TODO: GH#18217
+                        if (classAlias) {
+                            var clone_1 = ts.getSynthesizedClone(classAlias);
+                            ts.setSourceMapRange(clone_1, node);
+                            ts.setCommentRange(clone_1, node);
+                            return clone_1;
+                        }
+                    }
+                }
+            }
+            return undefined;
+        }
+        function trySubstituteNamespaceExportedName(node) {
+            // If this is explicitly a local name, do not substitute.
+            if (enabledSubstitutions & applicableSubstitutions && !ts.isGeneratedIdentifier(node) && !ts.isLocalName(node)) {
+                // If we are nested within a namespace declaration, we may need to qualifiy
+                // an identifier that is exported from a merged namespace.
+                var container = resolver.getReferencedExportContainer(node, /*prefixLocals*/ false);
+                if (container && container.kind !== 274 /* SourceFile */) {
+                    var substitute = (applicableSubstitutions & 2 /* NamespaceExports */ && container.kind === 239 /* ModuleDeclaration */) ||
+                        (applicableSubstitutions & 8 /* NonQualifiedEnumMembers */ && container.kind === 238 /* EnumDeclaration */);
+                    if (substitute) {
+                        return ts.setTextRange(ts.createPropertyAccess(ts.getGeneratedNameForNode(container), node), 
+                        /*location*/ node);
+                    }
+                }
+            }
+            return undefined;
+        }
+        function substitutePropertyAccessExpression(node) {
+            return substituteConstantValue(node);
+        }
+        function substituteElementAccessExpression(node) {
+            return substituteConstantValue(node);
+        }
+        function substituteConstantValue(node) {
+            var constantValue = tryGetConstEnumValue(node);
+            if (constantValue !== undefined) {
+                // track the constant value on the node for the printer in needsDotDotForPropertyAccess
+                ts.setConstantValue(node, constantValue);
+                var substitute = ts.createLiteral(constantValue);
+                if (!compilerOptions.removeComments) {
+                    var propertyName = ts.isPropertyAccessExpression(node)
+                        ? ts.declarationNameToString(node.name)
+                        : ts.getTextOfNode(node.argumentExpression);
+                    ts.addSyntheticTrailingComment(substitute, 3 /* MultiLineCommentTrivia */, " " + propertyName + " ");
+                }
+                return substitute;
+            }
+            return node;
+        }
+        function tryGetConstEnumValue(node) {
+            if (compilerOptions.isolatedModules) {
+                return undefined;
+            }
+            return ts.isPropertyAccessExpression(node) || ts.isElementAccessExpression(node) ? resolver.getConstantValue(node) : undefined;
+        }
+    }
+    ts.transformTypeScript = transformTypeScript;
+    function createDecorateHelper(context, decoratorExpressions, target, memberName, descriptor, location) {
+        var argumentsArray = [];
+        argumentsArray.push(ts.createArrayLiteral(decoratorExpressions, /*multiLine*/ true));
+        argumentsArray.push(target);
+        if (memberName) {
+            argumentsArray.push(memberName);
+            if (descriptor) {
+                argumentsArray.push(descriptor);
+            }
+        }
+        context.requestEmitHelper(decorateHelper);
+        return ts.setTextRange(ts.createCall(ts.getHelperName("__decorate"), 
+        /*typeArguments*/ undefined, argumentsArray), location);
+    }
+    var decorateHelper = {
+        name: "typescript:decorate",
+        scoped: false,
+        priority: 2,
+        text: "\n            var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {\n                var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;\n                if (typeof Reflect === \"object\" && typeof Reflect.decorate === \"function\") r = Reflect.decorate(decorators, target, key, desc);\n                else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;\n                return c > 3 && r && Object.defineProperty(target, key, r), r;\n            };"
+    };
+    function createMetadataHelper(context, metadataKey, metadataValue) {
+        context.requestEmitHelper(metadataHelper);
+        return ts.createCall(ts.getHelperName("__metadata"), 
+        /*typeArguments*/ undefined, [
+            ts.createLiteral(metadataKey),
+            metadataValue
+        ]);
+    }
+    var metadataHelper = {
+        name: "typescript:metadata",
+        scoped: false,
+        priority: 3,
+        text: "\n            var __metadata = (this && this.__metadata) || function (k, v) {\n                if (typeof Reflect === \"object\" && typeof Reflect.metadata === \"function\") return Reflect.metadata(k, v);\n            };"
+    };
+    function createParamHelper(context, expression, parameterOffset, location) {
+        context.requestEmitHelper(paramHelper);
+        return ts.setTextRange(ts.createCall(ts.getHelperName("__param"), 
+        /*typeArguments*/ undefined, [
+            ts.createLiteral(parameterOffset),
+            expression
+        ]), location);
+    }
+    var paramHelper = {
+        name: "typescript:param",
+        scoped: false,
+        priority: 4,
+        text: "\n            var __param = (this && this.__param) || function (paramIndex, decorator) {\n                return function (target, key) { decorator(target, key, paramIndex); }\n            };"
+    };
+})(ts || (ts = {}));
+/*@internal*/
+var ts;
+(function (ts) {
+    var ES2017SubstitutionFlags;
+    (function (ES2017SubstitutionFlags) {
+        /** Enables substitutions for async methods with `super` calls. */
+        ES2017SubstitutionFlags[ES2017SubstitutionFlags["AsyncMethodsWithSuper"] = 1] = "AsyncMethodsWithSuper";
+    })(ES2017SubstitutionFlags || (ES2017SubstitutionFlags = {}));
+    function transformES2017(context) {
+        var resumeLexicalEnvironment = context.resumeLexicalEnvironment, endLexicalEnvironment = context.endLexicalEnvironment, hoistVariableDeclaration = context.hoistVariableDeclaration;
+        var resolver = context.getEmitResolver();
+        var compilerOptions = context.getCompilerOptions();
+        var languageVersion = ts.getEmitScriptTarget(compilerOptions);
+        /**
+         * Keeps track of whether expression substitution has been enabled for specific edge cases.
+         * They are persisted between each SourceFile transformation and should not be reset.
+         */
+        var enabledSubstitutions;
+        /**
+         * This keeps track of containers where `super` is valid, for use with
+         * just-in-time substitution for `super` expressions inside of async methods.
+         */
+        var enclosingSuperContainerFlags = 0;
+        var enclosingFunctionParameterNames;
+        // Save the previous transformation hooks.
+        var previousOnEmitNode = context.onEmitNode;
+        var previousOnSubstituteNode = context.onSubstituteNode;
+        // Set new transformation hooks.
+        context.onEmitNode = onEmitNode;
+        context.onSubstituteNode = onSubstituteNode;
+        return ts.chainBundle(transformSourceFile);
+        function transformSourceFile(node) {
+            if (node.isDeclarationFile) {
+                return node;
+            }
+            var visited = ts.visitEachChild(node, visitor, context);
+            ts.addEmitHelpers(visited, context.readEmitHelpers());
+            return visited;
+        }
+        function visitor(node) {
+            if ((node.transformFlags & 16 /* ContainsES2017 */) === 0) {
+                return node;
+            }
+            switch (node.kind) {
+                case 120 /* AsyncKeyword */:
+                    // ES2017 async modifier should be elided for targets < ES2017
+                    return undefined;
+                case 197 /* AwaitExpression */:
+                    return visitAwaitExpression(node);
+                case 154 /* MethodDeclaration */:
+                    return visitMethodDeclaration(node);
+                case 234 /* FunctionDeclaration */:
+                    return visitFunctionDeclaration(node);
+                case 192 /* FunctionExpression */:
+                    return visitFunctionExpression(node);
+                case 193 /* ArrowFunction */:
+                    return visitArrowFunction(node);
+                default:
+                    return ts.visitEachChild(node, visitor, context);
+            }
+        }
+        function asyncBodyVisitor(node) {
+            if (ts.isNodeWithPossibleHoistedDeclaration(node)) {
+                switch (node.kind) {
+                    case 214 /* VariableStatement */:
+                        return visitVariableStatementInAsyncBody(node);
+                    case 220 /* ForStatement */:
+                        return visitForStatementInAsyncBody(node);
+                    case 221 /* ForInStatement */:
+                        return visitForInStatementInAsyncBody(node);
+                    case 222 /* ForOfStatement */:
+                        return visitForOfStatementInAsyncBody(node);
+                    case 269 /* CatchClause */:
+                        return visitCatchClauseInAsyncBody(node);
+                    case 213 /* Block */:
+                    case 227 /* SwitchStatement */:
+                    case 241 /* CaseBlock */:
+                    case 266 /* CaseClause */:
+                    case 267 /* DefaultClause */:
+                    case 230 /* TryStatement */:
+                    case 218 /* DoStatement */:
+                    case 219 /* WhileStatement */:
+                    case 217 /* IfStatement */:
+                    case 226 /* WithStatement */:
+                    case 228 /* LabeledStatement */:
+                        return ts.visitEachChild(node, asyncBodyVisitor, context);
+                    default:
+                        return ts.Debug.assertNever(node, "Unhandled node.");
+                }
+            }
+            return visitor(node);
+        }
+        function visitCatchClauseInAsyncBody(node) {
+            var catchClauseNames = ts.createUnderscoreEscapedMap();
+            recordDeclarationName(node.variableDeclaration, catchClauseNames); // TODO: GH#18217
+            // names declared in a catch variable are block scoped
+            var catchClauseUnshadowedNames;
+            catchClauseNames.forEach(function (_, escapedName) {
+                if (enclosingFunctionParameterNames.has(escapedName)) {
+                    if (!catchClauseUnshadowedNames) {
+                        catchClauseUnshadowedNames = ts.cloneMap(enclosingFunctionParameterNames);
+                    }
+                    catchClauseUnshadowedNames.delete(escapedName);
+                }
+            });
+            if (catchClauseUnshadowedNames) {
+                var savedEnclosingFunctionParameterNames = enclosingFunctionParameterNames;
+                enclosingFunctionParameterNames = catchClauseUnshadowedNames;
+                var result = ts.visitEachChild(node, asyncBodyVisitor, context);
+                enclosingFunctionParameterNames = savedEnclosingFunctionParameterNames;
+                return result;
+            }
+            else {
+                return ts.visitEachChild(node, asyncBodyVisitor, context);
+            }
+        }
+        function visitVariableStatementInAsyncBody(node) {
+            if (isVariableDeclarationListWithCollidingName(node.declarationList)) {
+                var expression = visitVariableDeclarationListWithCollidingNames(node.declarationList, /*hasReceiver*/ false);
+                return expression ? ts.createStatement(expression) : undefined;
+            }
+            return ts.visitEachChild(node, visitor, context);
+        }
+        function visitForInStatementInAsyncBody(node) {
+            return ts.updateForIn(node, isVariableDeclarationListWithCollidingName(node.initializer)
+                ? visitVariableDeclarationListWithCollidingNames(node.initializer, /*hasReceiver*/ true)
+                : ts.visitNode(node.initializer, visitor, ts.isForInitializer), ts.visitNode(node.expression, visitor, ts.isExpression), ts.visitNode(node.statement, asyncBodyVisitor, ts.isStatement, ts.liftToBlock));
+        }
+        function visitForOfStatementInAsyncBody(node) {
+            return ts.updateForOf(node, ts.visitNode(node.awaitModifier, visitor, ts.isToken), isVariableDeclarationListWithCollidingName(node.initializer)
+                ? visitVariableDeclarationListWithCollidingNames(node.initializer, /*hasReceiver*/ true)
+                : ts.visitNode(node.initializer, visitor, ts.isForInitializer), ts.visitNode(node.expression, visitor, ts.isExpression), ts.visitNode(node.statement, asyncBodyVisitor, ts.isStatement, ts.liftToBlock));
+        }
+        function visitForStatementInAsyncBody(node) {
+            var initializer = node.initializer; // TODO: GH#18217
+            return ts.updateFor(node, isVariableDeclarationListWithCollidingName(initializer)
+                ? visitVariableDeclarationListWithCollidingNames(initializer, /*hasReceiver*/ false)
+                : ts.visitNode(node.initializer, visitor, ts.isForInitializer), ts.visitNode(node.condition, visitor, ts.isExpression), ts.visitNode(node.incrementor, visitor, ts.isExpression), ts.visitNode(node.statement, asyncBodyVisitor, ts.isStatement, ts.liftToBlock));
+        }
+        /**
+         * Visits an AwaitExpression node.
+         *
+         * This function will be called any time a ES2017 await expression is encountered.
+         *
+         * @param node The node to visit.
+         */
+        function visitAwaitExpression(node) {
+            return ts.setOriginalNode(ts.setTextRange(ts.createYield(
+            /*asteriskToken*/ undefined, ts.visitNode(node.expression, visitor, ts.isExpression)), node), node);
+        }
+        /**
+         * Visits a MethodDeclaration node.
+         *
+         * This function will be called when one of the following conditions are met:
+         * - The node is marked as async
+         *
+         * @param node The node to visit.
+         */
+        function visitMethodDeclaration(node) {
+            return ts.updateMethod(node, 
+            /*decorators*/ undefined, ts.visitNodes(node.modifiers, visitor, ts.isModifier), node.asteriskToken, node.name, 
+            /*questionToken*/ undefined, 
+            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
+            /*type*/ undefined, ts.getFunctionFlags(node) & 2 /* Async */
+                ? transformAsyncFunctionBody(node)
+                : ts.visitFunctionBody(node.body, visitor, context));
+        }
+        /**
+         * Visits a FunctionDeclaration node.
+         *
+         * This function will be called when one of the following conditions are met:
+         * - The node is marked async
+         *
+         * @param node The node to visit.
+         */
+        function visitFunctionDeclaration(node) {
+            return ts.updateFunctionDeclaration(node, 
+            /*decorators*/ undefined, ts.visitNodes(node.modifiers, visitor, ts.isModifier), node.asteriskToken, node.name, 
+            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
+            /*type*/ undefined, ts.getFunctionFlags(node) & 2 /* Async */
+                ? transformAsyncFunctionBody(node)
+                : ts.visitFunctionBody(node.body, visitor, context));
+        }
+        /**
+         * Visits a FunctionExpression node.
+         *
+         * This function will be called when one of the following conditions are met:
+         * - The node is marked async
+         *
+         * @param node The node to visit.
+         */
+        function visitFunctionExpression(node) {
+            return ts.updateFunctionExpression(node, ts.visitNodes(node.modifiers, visitor, ts.isModifier), node.asteriskToken, node.name, 
+            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
+            /*type*/ undefined, ts.getFunctionFlags(node) & 2 /* Async */
+                ? transformAsyncFunctionBody(node)
+                : ts.visitFunctionBody(node.body, visitor, context));
+        }
+        /**
+         * Visits an ArrowFunction.
+         *
+         * This function will be called when one of the following conditions are met:
+         * - The node is marked async
+         *
+         * @param node The node to visit.
+         */
+        function visitArrowFunction(node) {
+            return ts.updateArrowFunction(node, ts.visitNodes(node.modifiers, visitor, ts.isModifier), 
+            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
+            /*type*/ undefined, node.equalsGreaterThanToken, ts.getFunctionFlags(node) & 2 /* Async */
+                ? transformAsyncFunctionBody(node)
+                : ts.visitFunctionBody(node.body, visitor, context));
+        }
+        function recordDeclarationName(_a, names) {
+            var name = _a.name;
+            if (ts.isIdentifier(name)) {
+                names.set(name.escapedText, true);
+            }
+            else {
+                for (var _i = 0, _b = name.elements; _i < _b.length; _i++) {
+                    var element = _b[_i];
+                    if (!ts.isOmittedExpression(element)) {
+                        recordDeclarationName(element, names);
+                    }
+                }
+            }
+        }
+        function isVariableDeclarationListWithCollidingName(node) {
+            return !!node
+                && ts.isVariableDeclarationList(node)
+                && !(node.flags & 3 /* BlockScoped */)
+                && node.declarations.some(collidesWithParameterName);
+        }
+        function visitVariableDeclarationListWithCollidingNames(node, hasReceiver) {
+            hoistVariableDeclarationList(node);
+            var variables = ts.getInitializedVariables(node);
+            if (variables.length === 0) {
+                if (hasReceiver) {
+                    return ts.visitNode(ts.convertToAssignmentElementTarget(node.declarations[0].name), visitor, ts.isExpression);
+                }
+                return undefined;
+            }
+            return ts.inlineExpressions(ts.map(variables, transformInitializedVariable));
+        }
+        function hoistVariableDeclarationList(node) {
+            ts.forEach(node.declarations, hoistVariable);
+        }
+        function hoistVariable(_a) {
+            var name = _a.name;
+            if (ts.isIdentifier(name)) {
+                hoistVariableDeclaration(name);
+            }
+            else {
+                for (var _i = 0, _b = name.elements; _i < _b.length; _i++) {
+                    var element = _b[_i];
+                    if (!ts.isOmittedExpression(element)) {
+                        hoistVariable(element);
+                    }
+                }
+            }
+        }
+        function transformInitializedVariable(node) {
+            var converted = ts.setSourceMapRange(ts.createAssignment(ts.convertToAssignmentElementTarget(node.name), node.initializer), node);
+            return ts.visitNode(converted, visitor, ts.isExpression);
+        }
+        function collidesWithParameterName(_a) {
+            var name = _a.name;
+            if (ts.isIdentifier(name)) {
+                return enclosingFunctionParameterNames.has(name.escapedText);
+            }
+            else {
+                for (var _i = 0, _b = name.elements; _i < _b.length; _i++) {
+                    var element = _b[_i];
+                    if (!ts.isOmittedExpression(element) && collidesWithParameterName(element)) {
+                        return true;
+                    }
+                }
+            }
+            return false;
+        }
+        function transformAsyncFunctionBody(node) {
+            resumeLexicalEnvironment();
+            var original = ts.getOriginalNode(node, ts.isFunctionLike);
+            var nodeType = original.type;
+            var promiseConstructor = languageVersion < 2 /* ES2015 */ ? getPromiseConstructor(nodeType) : undefined;
+            var isArrowFunction = node.kind === 193 /* ArrowFunction */;
+            var hasLexicalArguments = (resolver.getNodeCheckFlags(node) & 8192 /* CaptureArguments */) !== 0;
+            // An async function is emit as an outer function that calls an inner
+            // generator function. To preserve lexical bindings, we pass the current
+            // `this` and `arguments` objects to `__awaiter`. The generator function
+            // passed to `__awaiter` is executed inside of the callback to the
+            // promise constructor.
+            var savedEnclosingFunctionParameterNames = enclosingFunctionParameterNames;
+            enclosingFunctionParameterNames = ts.createUnderscoreEscapedMap();
+            for (var _i = 0, _a = node.parameters; _i < _a.length; _i++) {
+                var parameter = _a[_i];
+                recordDeclarationName(parameter, enclosingFunctionParameterNames);
+            }
+            var result;
+            if (!isArrowFunction) {
+                var statements = [];
+                var statementOffset = ts.addPrologue(statements, node.body.statements, /*ensureUseStrict*/ false, visitor);
+                statements.push(ts.createReturn(createAwaiterHelper(context, hasLexicalArguments, promiseConstructor, transformAsyncFunctionBodyWorker(node.body, statementOffset))));
+                ts.prependStatements(statements, endLexicalEnvironment());
+                var block = ts.createBlock(statements, /*multiLine*/ true);
+                ts.setTextRange(block, node.body);
+                // Minor optimization, emit `_super` helper to capture `super` access in an arrow.
+                // This step isn't needed if we eventually transform this to ES5.
+                if (languageVersion >= 2 /* ES2015 */) {
+                    if (resolver.getNodeCheckFlags(node) & 4096 /* AsyncMethodWithSuperBinding */) {
+                        enableSubstitutionForAsyncMethodsWithSuper();
+                        ts.addEmitHelper(block, ts.advancedAsyncSuperHelper);
+                    }
+                    else if (resolver.getNodeCheckFlags(node) & 2048 /* AsyncMethodWithSuper */) {
+                        enableSubstitutionForAsyncMethodsWithSuper();
+                        ts.addEmitHelper(block, ts.asyncSuperHelper);
+                    }
+                }
+                result = block;
+            }
+            else {
+                var expression = createAwaiterHelper(context, hasLexicalArguments, promiseConstructor, transformAsyncFunctionBodyWorker(node.body));
+                var declarations = endLexicalEnvironment();
+                if (ts.some(declarations)) {
+                    var block = ts.convertToFunctionBody(expression);
+                    result = ts.updateBlock(block, ts.setTextRange(ts.createNodeArray(ts.concatenate(declarations, block.statements)), block.statements));
+                }
+                else {
+                    result = expression;
+                }
+            }
+            enclosingFunctionParameterNames = savedEnclosingFunctionParameterNames;
+            return result;
+        }
+        function transformAsyncFunctionBodyWorker(body, start) {
+            if (ts.isBlock(body)) {
+                return ts.updateBlock(body, ts.visitNodes(body.statements, asyncBodyVisitor, ts.isStatement, start));
+            }
+            else {
+                return ts.convertToFunctionBody(ts.visitNode(body, asyncBodyVisitor, ts.isConciseBody));
+            }
+        }
+        function getPromiseConstructor(type) {
+            var typeName = type && ts.getEntityNameFromTypeNode(type);
+            if (typeName && ts.isEntityName(typeName)) {
+                var serializationKind = resolver.getTypeReferenceSerializationKind(typeName);
+                if (serializationKind === ts.TypeReferenceSerializationKind.TypeWithConstructSignatureAndValue
+                    || serializationKind === ts.TypeReferenceSerializationKind.Unknown) {
+                    return typeName;
+                }
+            }
+            return undefined;
+        }
+        function enableSubstitutionForAsyncMethodsWithSuper() {
+            if ((enabledSubstitutions & 1 /* AsyncMethodsWithSuper */) === 0) {
+                enabledSubstitutions |= 1 /* AsyncMethodsWithSuper */;
+                // We need to enable substitutions for call, property access, and element access
+                // if we need to rewrite super calls.
+                context.enableSubstitution(187 /* CallExpression */);
+                context.enableSubstitution(185 /* PropertyAccessExpression */);
+                context.enableSubstitution(186 /* ElementAccessExpression */);
+                // We need to be notified when entering and exiting declarations that bind super.
+                context.enableEmitNotification(235 /* ClassDeclaration */);
+                context.enableEmitNotification(154 /* MethodDeclaration */);
+                context.enableEmitNotification(156 /* GetAccessor */);
+                context.enableEmitNotification(157 /* SetAccessor */);
+                context.enableEmitNotification(155 /* Constructor */);
+            }
+        }
+        /**
+         * Hook for node emit.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to emit.
+         * @param emit A callback used to emit the node in the printer.
+         */
+        function onEmitNode(hint, node, emitCallback) {
+            // If we need to support substitutions for `super` in an async method,
+            // we should track it here.
+            if (enabledSubstitutions & 1 /* AsyncMethodsWithSuper */ && isSuperContainer(node)) {
+                var superContainerFlags = resolver.getNodeCheckFlags(node) & (2048 /* AsyncMethodWithSuper */ | 4096 /* AsyncMethodWithSuperBinding */);
+                if (superContainerFlags !== enclosingSuperContainerFlags) {
+                    var savedEnclosingSuperContainerFlags = enclosingSuperContainerFlags;
+                    enclosingSuperContainerFlags = superContainerFlags;
+                    previousOnEmitNode(hint, node, emitCallback);
+                    enclosingSuperContainerFlags = savedEnclosingSuperContainerFlags;
+                    return;
+                }
+            }
+            previousOnEmitNode(hint, node, emitCallback);
+        }
+        /**
+         * Hooks node substitutions.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to substitute.
+         */
+        function onSubstituteNode(hint, node) {
+            node = previousOnSubstituteNode(hint, node);
+            if (hint === 1 /* Expression */ && enclosingSuperContainerFlags) {
+                return substituteExpression(node);
+            }
+            return node;
+        }
+        function substituteExpression(node) {
+            switch (node.kind) {
+                case 185 /* PropertyAccessExpression */:
+                    return substitutePropertyAccessExpression(node);
+                case 186 /* ElementAccessExpression */:
+                    return substituteElementAccessExpression(node);
+                case 187 /* CallExpression */:
+                    return substituteCallExpression(node);
+            }
+            return node;
+        }
+        function substitutePropertyAccessExpression(node) {
+            if (node.expression.kind === 97 /* SuperKeyword */) {
+                return createSuperAccessInAsyncMethod(ts.createLiteral(ts.idText(node.name)), node);
+            }
+            return node;
+        }
+        function substituteElementAccessExpression(node) {
+            if (node.expression.kind === 97 /* SuperKeyword */) {
+                return createSuperAccessInAsyncMethod(node.argumentExpression, node);
+            }
+            return node;
+        }
+        function substituteCallExpression(node) {
+            var expression = node.expression;
+            if (ts.isSuperProperty(expression)) {
+                var argumentExpression = ts.isPropertyAccessExpression(expression)
+                    ? substitutePropertyAccessExpression(expression)
+                    : substituteElementAccessExpression(expression);
+                return ts.createCall(ts.createPropertyAccess(argumentExpression, "call"), 
+                /*typeArguments*/ undefined, [
+                    ts.createThis()
+                ].concat(node.arguments));
+            }
+            return node;
+        }
+        function isSuperContainer(node) {
+            var kind = node.kind;
+            return kind === 235 /* ClassDeclaration */
+                || kind === 155 /* Constructor */
+                || kind === 154 /* MethodDeclaration */
+                || kind === 156 /* GetAccessor */
+                || kind === 157 /* SetAccessor */;
+        }
+        function createSuperAccessInAsyncMethod(argumentExpression, location) {
+            if (enclosingSuperContainerFlags & 4096 /* AsyncMethodWithSuperBinding */) {
+                return ts.setTextRange(ts.createPropertyAccess(ts.createCall(ts.createFileLevelUniqueName("_super"), 
+                /*typeArguments*/ undefined, [argumentExpression]), "value"), location);
+            }
+            else {
+                return ts.setTextRange(ts.createCall(ts.createFileLevelUniqueName("_super"), 
+                /*typeArguments*/ undefined, [argumentExpression]), location);
+            }
+        }
+    }
+    ts.transformES2017 = transformES2017;
+    var awaiterHelper = {
+        name: "typescript:awaiter",
+        scoped: false,
+        priority: 5,
+        text: "\n            var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {\n                return new (P || (P = Promise))(function (resolve, reject) {\n                    function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }\n                    function rejected(value) { try { step(generator[\"throw\"](value)); } catch (e) { reject(e); } }\n                    function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }\n                    step((generator = generator.apply(thisArg, _arguments || [])).next());\n                });\n            };"
+    };
+    function createAwaiterHelper(context, hasLexicalArguments, promiseConstructor, body) {
+        context.requestEmitHelper(awaiterHelper);
+        var generatorFunc = ts.createFunctionExpression(
+        /*modifiers*/ undefined, ts.createToken(39 /* AsteriskToken */), 
+        /*name*/ undefined, 
+        /*typeParameters*/ undefined, 
+        /*parameters*/ [], 
+        /*type*/ undefined, body);
+        // Mark this node as originally an async function
+        (generatorFunc.emitNode || (generatorFunc.emitNode = {})).flags |= 262144 /* AsyncFunctionBody */ | 524288 /* ReuseTempVariableScope */;
+        return ts.createCall(ts.getHelperName("__awaiter"), 
+        /*typeArguments*/ undefined, [
+            ts.createThis(),
+            hasLexicalArguments ? ts.createIdentifier("arguments") : ts.createVoidZero(),
+            promiseConstructor ? ts.createExpressionFromEntityName(promiseConstructor) : ts.createVoidZero(),
+            generatorFunc
+        ]);
+    }
+    ts.asyncSuperHelper = {
+        name: "typescript:async-super",
+        scoped: true,
+        text: ts.helperString(__makeTemplateObject(["\n            const ", " = name => super[name];"], ["\n            const ", " = name => super[name];"]), "_super")
+    };
+    ts.advancedAsyncSuperHelper = {
+        name: "typescript:advanced-async-super",
+        scoped: true,
+        text: ts.helperString(__makeTemplateObject(["\n            const ", " = (function (geti, seti) {\n                const cache = Object.create(null);\n                return name => cache[name] || (cache[name] = { get value() { return geti(name); }, set value(v) { seti(name, v); } });\n            })(name => super[name], (name, value) => super[name] = value);"], ["\n            const ", " = (function (geti, seti) {\n                const cache = Object.create(null);\n                return name => cache[name] || (cache[name] = { get value() { return geti(name); }, set value(v) { seti(name, v); } });\n            })(name => super[name], (name, value) => super[name] = value);"]), "_super")
+    };
+})(ts || (ts = {}));
+/*@internal*/
+var ts;
+(function (ts) {
+    var ESNextSubstitutionFlags;
+    (function (ESNextSubstitutionFlags) {
+        /** Enables substitutions for async methods with `super` calls. */
+        ESNextSubstitutionFlags[ESNextSubstitutionFlags["AsyncMethodsWithSuper"] = 1] = "AsyncMethodsWithSuper";
+    })(ESNextSubstitutionFlags || (ESNextSubstitutionFlags = {}));
+    function transformESNext(context) {
+        var resumeLexicalEnvironment = context.resumeLexicalEnvironment, endLexicalEnvironment = context.endLexicalEnvironment, hoistVariableDeclaration = context.hoistVariableDeclaration;
+        var resolver = context.getEmitResolver();
+        var compilerOptions = context.getCompilerOptions();
+        var languageVersion = ts.getEmitScriptTarget(compilerOptions);
+        var previousOnEmitNode = context.onEmitNode;
+        context.onEmitNode = onEmitNode;
+        var previousOnSubstituteNode = context.onSubstituteNode;
+        context.onSubstituteNode = onSubstituteNode;
+        var enabledSubstitutions;
+        var enclosingFunctionFlags;
+        var enclosingSuperContainerFlags = 0;
+        return ts.chainBundle(transformSourceFile);
+        function transformSourceFile(node) {
+            if (node.isDeclarationFile) {
+                return node;
+            }
+            var visited = ts.visitEachChild(node, visitor, context);
+            ts.addEmitHelpers(visited, context.readEmitHelpers());
+            return visited;
+        }
+        function visitor(node) {
+            return visitorWorker(node, /*noDestructuringValue*/ false);
+        }
+        function visitorNoDestructuringValue(node) {
+            return visitorWorker(node, /*noDestructuringValue*/ true);
+        }
+        function visitorNoAsyncModifier(node) {
+            if (node.kind === 120 /* AsyncKeyword */) {
+                return undefined;
+            }
+            return node;
+        }
+        function visitorWorker(node, noDestructuringValue) {
+            if ((node.transformFlags & 8 /* ContainsESNext */) === 0) {
+                return node;
+            }
+            switch (node.kind) {
+                case 197 /* AwaitExpression */:
+                    return visitAwaitExpression(node);
+                case 203 /* YieldExpression */:
+                    return visitYieldExpression(node);
+                case 225 /* ReturnStatement */:
+                    return visitReturnStatement(node);
+                case 228 /* LabeledStatement */:
+                    return visitLabeledStatement(node);
+                case 184 /* ObjectLiteralExpression */:
+                    return visitObjectLiteralExpression(node);
+                case 200 /* BinaryExpression */:
+                    return visitBinaryExpression(node, noDestructuringValue);
+                case 232 /* VariableDeclaration */:
+                    return visitVariableDeclaration(node);
+                case 222 /* ForOfStatement */:
+                    return visitForOfStatement(node, /*outermostLabeledStatement*/ undefined);
+                case 220 /* ForStatement */:
+                    return visitForStatement(node);
+                case 196 /* VoidExpression */:
+                    return visitVoidExpression(node);
+                case 155 /* Constructor */:
+                    return visitConstructorDeclaration(node);
+                case 154 /* MethodDeclaration */:
+                    return visitMethodDeclaration(node);
+                case 156 /* GetAccessor */:
+                    return visitGetAccessorDeclaration(node);
+                case 157 /* SetAccessor */:
+                    return visitSetAccessorDeclaration(node);
+                case 234 /* FunctionDeclaration */:
+                    return visitFunctionDeclaration(node);
+                case 192 /* FunctionExpression */:
+                    return visitFunctionExpression(node);
+                case 193 /* ArrowFunction */:
+                    return visitArrowFunction(node);
+                case 149 /* Parameter */:
+                    return visitParameter(node);
+                case 216 /* ExpressionStatement */:
+                    return visitExpressionStatement(node);
+                case 191 /* ParenthesizedExpression */:
+                    return visitParenthesizedExpression(node, noDestructuringValue);
+                case 269 /* CatchClause */:
+                    return visitCatchClause(node);
+                default:
+                    return ts.visitEachChild(node, visitor, context);
+            }
+        }
+        function visitAwaitExpression(node) {
+            if (enclosingFunctionFlags & 2 /* Async */ && enclosingFunctionFlags & 1 /* Generator */) {
+                return ts.setOriginalNode(ts.setTextRange(ts.createYield(createAwaitHelper(context, ts.visitNode(node.expression, visitor, ts.isExpression))), 
+                /*location*/ node), node);
+            }
+            return ts.visitEachChild(node, visitor, context);
+        }
+        function visitYieldExpression(node) {
+            if (enclosingFunctionFlags & 2 /* Async */ && enclosingFunctionFlags & 1 /* Generator */) {
+                if (node.asteriskToken) {
+                    var expression = ts.visitNode(node.expression, visitor, ts.isExpression);
+                    return ts.setOriginalNode(ts.setTextRange(ts.createYield(createAwaitHelper(context, ts.updateYield(node, node.asteriskToken, createAsyncDelegatorHelper(context, createAsyncValuesHelper(context, expression, expression), expression)))), node), node);
+                }
+                return ts.setOriginalNode(ts.setTextRange(ts.createYield(createDownlevelAwait(node.expression
+                    ? ts.visitNode(node.expression, visitor, ts.isExpression)
+                    : ts.createVoidZero())), node), node);
+            }
+            return ts.visitEachChild(node, visitor, context);
+        }
+        function visitReturnStatement(node) {
+            if (enclosingFunctionFlags & 2 /* Async */ && enclosingFunctionFlags & 1 /* Generator */) {
+                return ts.updateReturn(node, createDownlevelAwait(node.expression ? ts.visitNode(node.expression, visitor, ts.isExpression) : ts.createVoidZero()));
+            }
+            return ts.visitEachChild(node, visitor, context);
+        }
+        function visitLabeledStatement(node) {
+            if (enclosingFunctionFlags & 2 /* Async */) {
+                var statement = ts.unwrapInnermostStatementOfLabel(node);
+                if (statement.kind === 222 /* ForOfStatement */ && statement.awaitModifier) {
+                    return visitForOfStatement(statement, node);
+                }
+                return ts.restoreEnclosingLabel(ts.visitEachChild(statement, visitor, context), node);
+            }
+            return ts.visitEachChild(node, visitor, context);
+        }
+        function chunkObjectLiteralElements(elements) {
+            var chunkObject;
+            var objects = [];
+            for (var _i = 0, elements_4 = elements; _i < elements_4.length; _i++) {
+                var e = elements_4[_i];
+                if (e.kind === 272 /* SpreadAssignment */) {
+                    if (chunkObject) {
+                        objects.push(ts.createObjectLiteral(chunkObject));
+                        chunkObject = undefined;
+                    }
+                    var target = e.expression;
+                    objects.push(ts.visitNode(target, visitor, ts.isExpression));
+                }
+                else {
+                    chunkObject = ts.append(chunkObject, e.kind === 270 /* PropertyAssignment */
+                        ? ts.createPropertyAssignment(e.name, ts.visitNode(e.initializer, visitor, ts.isExpression))
+                        : ts.visitNode(e, visitor, ts.isObjectLiteralElementLike));
+                }
+            }
+            if (chunkObject) {
+                objects.push(ts.createObjectLiteral(chunkObject));
+            }
+            return objects;
+        }
+        function visitObjectLiteralExpression(node) {
+            if (node.transformFlags & 1048576 /* ContainsObjectSpread */) {
+                // spread elements emit like so:
+                // non-spread elements are chunked together into object literals, and then all are passed to __assign:
+                //     { a, ...o, b } => __assign({a}, o, {b});
+                // If the first element is a spread element, then the first argument to __assign is {}:
+                //     { ...o, a, b, ...o2 } => __assign({}, o, {a, b}, o2)
+                var objects = chunkObjectLiteralElements(node.properties);
+                if (objects.length && objects[0].kind !== 184 /* ObjectLiteralExpression */) {
+                    objects.unshift(ts.createObjectLiteral());
+                }
+                return createAssignHelper(context, objects);
+            }
+            return ts.visitEachChild(node, visitor, context);
+        }
+        function visitExpressionStatement(node) {
+            return ts.visitEachChild(node, visitorNoDestructuringValue, context);
+        }
+        function visitParenthesizedExpression(node, noDestructuringValue) {
+            return ts.visitEachChild(node, noDestructuringValue ? visitorNoDestructuringValue : visitor, context);
+        }
+        function visitCatchClause(node) {
+            if (!node.variableDeclaration) {
+                return ts.updateCatchClause(node, ts.createVariableDeclaration(ts.createTempVariable(/*recordTempVariable*/ undefined)), ts.visitNode(node.block, visitor, ts.isBlock));
+            }
+            return ts.visitEachChild(node, visitor, context);
+        }
+        /**
+         * Visits a BinaryExpression that contains a destructuring assignment.
+         *
+         * @param node A BinaryExpression node.
+         */
+        function visitBinaryExpression(node, noDestructuringValue) {
+            if (ts.isDestructuringAssignment(node) && node.left.transformFlags & 1048576 /* ContainsObjectRest */) {
+                return ts.flattenDestructuringAssignment(node, visitor, context, 1 /* ObjectRest */, !noDestructuringValue);
+            }
+            else if (node.operatorToken.kind === 26 /* CommaToken */) {
+                return ts.updateBinary(node, ts.visitNode(node.left, visitorNoDestructuringValue, ts.isExpression), ts.visitNode(node.right, noDestructuringValue ? visitorNoDestructuringValue : visitor, ts.isExpression));
+            }
+            return ts.visitEachChild(node, visitor, context);
+        }
+        /**
+         * Visits a VariableDeclaration node with a binding pattern.
+         *
+         * @param node A VariableDeclaration node.
+         */
+        function visitVariableDeclaration(node) {
+            // If we are here it is because the name contains a binding pattern with a rest somewhere in it.
+            if (ts.isBindingPattern(node.name) && node.name.transformFlags & 1048576 /* ContainsObjectRest */) {
+                return ts.flattenDestructuringBinding(node, visitor, context, 1 /* ObjectRest */);
+            }
+            return ts.visitEachChild(node, visitor, context);
+        }
+        function visitForStatement(node) {
+            return ts.updateFor(node, ts.visitNode(node.initializer, visitorNoDestructuringValue, ts.isForInitializer), ts.visitNode(node.condition, visitor, ts.isExpression), ts.visitNode(node.incrementor, visitor, ts.isExpression), ts.visitNode(node.statement, visitor, ts.isStatement));
+        }
+        function visitVoidExpression(node) {
+            return ts.visitEachChild(node, visitorNoDestructuringValue, context);
+        }
+        /**
+         * Visits a ForOfStatement and converts it into a ES2015-compatible ForOfStatement.
+         *
+         * @param node A ForOfStatement.
+         */
+        function visitForOfStatement(node, outermostLabeledStatement) {
+            if (node.initializer.transformFlags & 1048576 /* ContainsObjectRest */) {
+                node = transformForOfStatementWithObjectRest(node);
+            }
+            if (node.awaitModifier) {
+                return transformForAwaitOfStatement(node, outermostLabeledStatement);
+            }
+            else {
+                return ts.restoreEnclosingLabel(ts.visitEachChild(node, visitor, context), outermostLabeledStatement);
+            }
+        }
+        function transformForOfStatementWithObjectRest(node) {
+            var initializerWithoutParens = ts.skipParentheses(node.initializer);
+            if (ts.isVariableDeclarationList(initializerWithoutParens) || ts.isAssignmentPattern(initializerWithoutParens)) {
+                var bodyLocation = void 0;
+                var statementsLocation = void 0;
+                var temp = ts.createTempVariable(/*recordTempVariable*/ undefined);
+                var statements = [ts.createForOfBindingStatement(initializerWithoutParens, temp)];
+                if (ts.isBlock(node.statement)) {
+                    ts.addRange(statements, node.statement.statements);
+                    bodyLocation = node.statement;
+                    statementsLocation = node.statement.statements;
+                }
+                else if (node.statement) {
+                    ts.append(statements, node.statement);
+                    bodyLocation = node.statement;
+                    statementsLocation = node.statement;
+                }
+                return ts.updateForOf(node, node.awaitModifier, ts.setTextRange(ts.createVariableDeclarationList([
+                    ts.setTextRange(ts.createVariableDeclaration(temp), node.initializer)
+                ], 1 /* Let */), node.initializer), node.expression, ts.setTextRange(ts.createBlock(ts.setTextRange(ts.createNodeArray(statements), statementsLocation), 
+                /*multiLine*/ true), bodyLocation));
+            }
+            return node;
+        }
+        function convertForOfStatementHead(node, boundValue) {
+            var binding = ts.createForOfBindingStatement(node.initializer, boundValue);
+            var bodyLocation;
+            var statementsLocation;
+            var statements = [ts.visitNode(binding, visitor, ts.isStatement)];
+            var statement = ts.visitNode(node.statement, visitor, ts.isStatement);
+            if (ts.isBlock(statement)) {
+                ts.addRange(statements, statement.statements);
+                bodyLocation = statement;
+                statementsLocation = statement.statements;
+            }
+            else {
+                statements.push(statement);
+            }
+            return ts.setEmitFlags(ts.setTextRange(ts.createBlock(ts.setTextRange(ts.createNodeArray(statements), statementsLocation), 
+            /*multiLine*/ true), bodyLocation), 48 /* NoSourceMap */ | 384 /* NoTokenSourceMaps */);
+        }
+        function createDownlevelAwait(expression) {
+            return enclosingFunctionFlags & 1 /* Generator */
+                ? ts.createYield(/*asteriskToken*/ undefined, createAwaitHelper(context, expression))
+                : ts.createAwait(expression);
+        }
+        function transformForAwaitOfStatement(node, outermostLabeledStatement) {
+            var expression = ts.visitNode(node.expression, visitor, ts.isExpression);
+            var iterator = ts.isIdentifier(expression) ? ts.getGeneratedNameForNode(expression) : ts.createTempVariable(/*recordTempVariable*/ undefined);
+            var result = ts.isIdentifier(expression) ? ts.getGeneratedNameForNode(iterator) : ts.createTempVariable(/*recordTempVariable*/ undefined);
+            var errorRecord = ts.createUniqueName("e");
+            var catchVariable = ts.getGeneratedNameForNode(errorRecord);
+            var returnMethod = ts.createTempVariable(/*recordTempVariable*/ undefined);
+            var callValues = createAsyncValuesHelper(context, expression, /*location*/ node.expression);
+            var callNext = ts.createCall(ts.createPropertyAccess(iterator, "next"), /*typeArguments*/ undefined, []);
+            var getDone = ts.createPropertyAccess(result, "done");
+            var getValue = ts.createPropertyAccess(result, "value");
+            var callReturn = ts.createFunctionCall(returnMethod, iterator, []);
+            hoistVariableDeclaration(errorRecord);
+            hoistVariableDeclaration(returnMethod);
+            var forStatement = ts.setEmitFlags(ts.setTextRange(ts.createFor(
+            /*initializer*/ ts.setEmitFlags(ts.setTextRange(ts.createVariableDeclarationList([
+                ts.setTextRange(ts.createVariableDeclaration(iterator, /*type*/ undefined, callValues), node.expression),
+                ts.createVariableDeclaration(result)
+            ]), node.expression), 2097152 /* NoHoisting */), 
+            /*condition*/ ts.createComma(ts.createAssignment(result, createDownlevelAwait(callNext)), ts.createLogicalNot(getDone)), 
+            /*incrementor*/ undefined, 
+            /*statement*/ convertForOfStatementHead(node, getValue)), 
+            /*location*/ node), 256 /* NoTokenTrailingSourceMaps */);
+            return ts.createTry(ts.createBlock([
+                ts.restoreEnclosingLabel(forStatement, outermostLabeledStatement)
+            ]), ts.createCatchClause(ts.createVariableDeclaration(catchVariable), ts.setEmitFlags(ts.createBlock([
+                ts.createStatement(ts.createAssignment(errorRecord, ts.createObjectLiteral([
+                    ts.createPropertyAssignment("error", catchVariable)
+                ])))
+            ]), 1 /* SingleLine */)), ts.createBlock([
+                ts.createTry(
+                /*tryBlock*/ ts.createBlock([
+                    ts.setEmitFlags(ts.createIf(ts.createLogicalAnd(ts.createLogicalAnd(result, ts.createLogicalNot(getDone)), ts.createAssignment(returnMethod, ts.createPropertyAccess(iterator, "return"))), ts.createStatement(createDownlevelAwait(callReturn))), 1 /* SingleLine */)
+                ]), 
+                /*catchClause*/ undefined, 
+                /*finallyBlock*/ ts.setEmitFlags(ts.createBlock([
+                    ts.setEmitFlags(ts.createIf(errorRecord, ts.createThrow(ts.createPropertyAccess(errorRecord, "error"))), 1 /* SingleLine */)
+                ]), 1 /* SingleLine */))
+            ]));
+        }
+        function visitParameter(node) {
+            if (node.transformFlags & 1048576 /* ContainsObjectRest */) {
+                // Binding patterns are converted into a generated name and are
+                // evaluated inside the function body.
+                return ts.updateParameter(node, 
+                /*decorators*/ undefined, 
+                /*modifiers*/ undefined, node.dotDotDotToken, ts.getGeneratedNameForNode(node), 
+                /*questionToken*/ undefined, 
+                /*type*/ undefined, ts.visitNode(node.initializer, visitor, ts.isExpression));
+            }
+            return ts.visitEachChild(node, visitor, context);
+        }
+        function visitConstructorDeclaration(node) {
+            var savedEnclosingFunctionFlags = enclosingFunctionFlags;
+            enclosingFunctionFlags = 0 /* Normal */;
+            var updated = ts.updateConstructor(node, 
+            /*decorators*/ undefined, node.modifiers, ts.visitParameterList(node.parameters, visitor, context), transformFunctionBody(node));
+            enclosingFunctionFlags = savedEnclosingFunctionFlags;
+            return updated;
+        }
+        function visitGetAccessorDeclaration(node) {
+            var savedEnclosingFunctionFlags = enclosingFunctionFlags;
+            enclosingFunctionFlags = 0 /* Normal */;
+            var updated = ts.updateGetAccessor(node, 
+            /*decorators*/ undefined, node.modifiers, ts.visitNode(node.name, visitor, ts.isPropertyName), ts.visitParameterList(node.parameters, visitor, context), 
+            /*type*/ undefined, transformFunctionBody(node));
+            enclosingFunctionFlags = savedEnclosingFunctionFlags;
+            return updated;
+        }
+        function visitSetAccessorDeclaration(node) {
+            var savedEnclosingFunctionFlags = enclosingFunctionFlags;
+            enclosingFunctionFlags = 0 /* Normal */;
+            var updated = ts.updateSetAccessor(node, 
+            /*decorators*/ undefined, node.modifiers, ts.visitNode(node.name, visitor, ts.isPropertyName), ts.visitParameterList(node.parameters, visitor, context), transformFunctionBody(node));
+            enclosingFunctionFlags = savedEnclosingFunctionFlags;
+            return updated;
+        }
+        function visitMethodDeclaration(node) {
+            var savedEnclosingFunctionFlags = enclosingFunctionFlags;
+            enclosingFunctionFlags = ts.getFunctionFlags(node);
+            var updated = ts.updateMethod(node, 
+            /*decorators*/ undefined, enclosingFunctionFlags & 1 /* Generator */
+                ? ts.visitNodes(node.modifiers, visitorNoAsyncModifier, ts.isModifier)
+                : node.modifiers, enclosingFunctionFlags & 2 /* Async */
+                ? undefined
+                : node.asteriskToken, ts.visitNode(node.name, visitor, ts.isPropertyName), ts.visitNode(/*questionToken*/ undefined, visitor, ts.isToken), 
+            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
+            /*type*/ undefined, enclosingFunctionFlags & 2 /* Async */ && enclosingFunctionFlags & 1 /* Generator */
+                ? transformAsyncGeneratorFunctionBody(node)
+                : transformFunctionBody(node));
+            enclosingFunctionFlags = savedEnclosingFunctionFlags;
+            return updated;
+        }
+        function visitFunctionDeclaration(node) {
+            var savedEnclosingFunctionFlags = enclosingFunctionFlags;
+            enclosingFunctionFlags = ts.getFunctionFlags(node);
+            var updated = ts.updateFunctionDeclaration(node, 
+            /*decorators*/ undefined, enclosingFunctionFlags & 1 /* Generator */
+                ? ts.visitNodes(node.modifiers, visitorNoAsyncModifier, ts.isModifier)
+                : node.modifiers, enclosingFunctionFlags & 2 /* Async */
+                ? undefined
+                : node.asteriskToken, node.name, 
+            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
+            /*type*/ undefined, enclosingFunctionFlags & 2 /* Async */ && enclosingFunctionFlags & 1 /* Generator */
+                ? transformAsyncGeneratorFunctionBody(node)
+                : transformFunctionBody(node));
+            enclosingFunctionFlags = savedEnclosingFunctionFlags;
+            return updated;
+        }
+        function visitArrowFunction(node) {
+            var savedEnclosingFunctionFlags = enclosingFunctionFlags;
+            enclosingFunctionFlags = ts.getFunctionFlags(node);
+            var updated = ts.updateArrowFunction(node, node.modifiers, 
+            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
+            /*type*/ undefined, node.equalsGreaterThanToken, transformFunctionBody(node));
+            enclosingFunctionFlags = savedEnclosingFunctionFlags;
+            return updated;
+        }
+        function visitFunctionExpression(node) {
+            var savedEnclosingFunctionFlags = enclosingFunctionFlags;
+            enclosingFunctionFlags = ts.getFunctionFlags(node);
+            var updated = ts.updateFunctionExpression(node, enclosingFunctionFlags & 1 /* Generator */
+                ? ts.visitNodes(node.modifiers, visitorNoAsyncModifier, ts.isModifier)
+                : node.modifiers, enclosingFunctionFlags & 2 /* Async */
+                ? undefined
+                : node.asteriskToken, node.name, 
+            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
+            /*type*/ undefined, enclosingFunctionFlags & 2 /* Async */ && enclosingFunctionFlags & 1 /* Generator */
+                ? transformAsyncGeneratorFunctionBody(node)
+                : transformFunctionBody(node));
+            enclosingFunctionFlags = savedEnclosingFunctionFlags;
+            return updated;
+        }
+        function transformAsyncGeneratorFunctionBody(node) {
+            resumeLexicalEnvironment();
+            var statements = [];
+            var statementOffset = ts.addPrologue(statements, node.body.statements, /*ensureUseStrict*/ false, visitor);
+            appendObjectRestAssignmentsIfNeeded(statements, node);
+            statements.push(ts.createReturn(createAsyncGeneratorHelper(context, ts.createFunctionExpression(
+            /*modifiers*/ undefined, ts.createToken(39 /* AsteriskToken */), node.name && ts.getGeneratedNameForNode(node.name), 
+            /*typeParameters*/ undefined, 
+            /*parameters*/ [], 
+            /*type*/ undefined, ts.updateBlock(node.body, ts.visitLexicalEnvironment(node.body.statements, visitor, context, statementOffset))))));
+            ts.prependStatements(statements, endLexicalEnvironment());
+            var block = ts.updateBlock(node.body, statements);
+            // Minor optimization, emit `_super` helper to capture `super` access in an arrow.
+            // This step isn't needed if we eventually transform this to ES5.
+            if (languageVersion >= 2 /* ES2015 */) {
+                if (resolver.getNodeCheckFlags(node) & 4096 /* AsyncMethodWithSuperBinding */) {
+                    enableSubstitutionForAsyncMethodsWithSuper();
+                    ts.addEmitHelper(block, ts.advancedAsyncSuperHelper);
+                }
+                else if (resolver.getNodeCheckFlags(node) & 2048 /* AsyncMethodWithSuper */) {
+                    enableSubstitutionForAsyncMethodsWithSuper();
+                    ts.addEmitHelper(block, ts.asyncSuperHelper);
+                }
+            }
+            return block;
+        }
+        function transformFunctionBody(node) {
+            resumeLexicalEnvironment();
+            var statementOffset = 0;
+            var statements = [];
+            var body = ts.visitNode(node.body, visitor, ts.isConciseBody);
+            if (ts.isBlock(body)) {
+                statementOffset = ts.addPrologue(statements, body.statements, /*ensureUseStrict*/ false, visitor);
+            }
+            ts.addRange(statements, appendObjectRestAssignmentsIfNeeded(/*statements*/ undefined, node));
+            var leadingStatements = endLexicalEnvironment();
+            if (statementOffset > 0 || ts.some(statements) || ts.some(leadingStatements)) {
+                var block = ts.convertToFunctionBody(body, /*multiLine*/ true);
+                ts.prependStatements(statements, leadingStatements);
+                ts.addRange(statements, block.statements.slice(statementOffset));
+                return ts.updateBlock(block, ts.setTextRange(ts.createNodeArray(statements), block.statements));
+            }
+            return body;
+        }
+        function appendObjectRestAssignmentsIfNeeded(statements, node) {
+            for (var _i = 0, _a = node.parameters; _i < _a.length; _i++) {
+                var parameter = _a[_i];
+                if (parameter.transformFlags & 1048576 /* ContainsObjectRest */) {
+                    var temp = ts.getGeneratedNameForNode(parameter);
+                    var declarations = ts.flattenDestructuringBinding(parameter, visitor, context, 1 /* ObjectRest */, temp, 
+                    /*doNotRecordTempVariablesInLine*/ false, 
+                    /*skipInitializer*/ true);
+                    if (ts.some(declarations)) {
+                        var statement = ts.createVariableStatement(
+                        /*modifiers*/ undefined, ts.createVariableDeclarationList(declarations));
+                        ts.setEmitFlags(statement, 1048576 /* CustomPrologue */);
+                        statements = ts.append(statements, statement);
+                    }
+                }
+            }
+            return statements;
+        }
+        function enableSubstitutionForAsyncMethodsWithSuper() {
+            if ((enabledSubstitutions & 1 /* AsyncMethodsWithSuper */) === 0) {
+                enabledSubstitutions |= 1 /* AsyncMethodsWithSuper */;
+                // We need to enable substitutions for call, property access, and element access
+                // if we need to rewrite super calls.
+                context.enableSubstitution(187 /* CallExpression */);
+                context.enableSubstitution(185 /* PropertyAccessExpression */);
+                context.enableSubstitution(186 /* ElementAccessExpression */);
+                // We need to be notified when entering and exiting declarations that bind super.
+                context.enableEmitNotification(235 /* ClassDeclaration */);
+                context.enableEmitNotification(154 /* MethodDeclaration */);
+                context.enableEmitNotification(156 /* GetAccessor */);
+                context.enableEmitNotification(157 /* SetAccessor */);
+                context.enableEmitNotification(155 /* Constructor */);
+            }
+        }
+        /**
+         * Called by the printer just before a node is printed.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to be printed.
+         * @param emitCallback The callback used to emit the node.
+         */
+        function onEmitNode(hint, node, emitCallback) {
+            // If we need to support substitutions for `super` in an async method,
+            // we should track it here.
+            if (enabledSubstitutions & 1 /* AsyncMethodsWithSuper */ && isSuperContainer(node)) {
+                var superContainerFlags = resolver.getNodeCheckFlags(node) & (2048 /* AsyncMethodWithSuper */ | 4096 /* AsyncMethodWithSuperBinding */);
+                if (superContainerFlags !== enclosingSuperContainerFlags) {
+                    var savedEnclosingSuperContainerFlags = enclosingSuperContainerFlags;
+                    enclosingSuperContainerFlags = superContainerFlags;
+                    previousOnEmitNode(hint, node, emitCallback);
+                    enclosingSuperContainerFlags = savedEnclosingSuperContainerFlags;
+                    return;
+                }
+            }
+            previousOnEmitNode(hint, node, emitCallback);
+        }
+        /**
+         * Hooks node substitutions.
+         *
+         * @param hint The context for the emitter.
+         * @param node The node to substitute.
+         */
+        function onSubstituteNode(hint, node) {
+            node = previousOnSubstituteNode(hint, node);
+            if (hint === 1 /* Expression */ && enclosingSuperContainerFlags) {
+                return substituteExpression(node);
+            }
+            return node;
+        }
+        function substituteExpression(node) {
+            switch (node.kind) {
+                case 185 /* PropertyAccessExpression */:
+                    return substitutePropertyAccessExpression(node);
+                case 186 /* ElementAccessExpression */:
+                    return substituteElementAccessExpression(node);
+                case 187 /* CallExpression */:
+                    return substituteCallExpression(node);
+            }
+            return node;
+        }
+        function substitutePropertyAccessExpression(node) {
+            if (node.expression.kind === 97 /* SuperKeyword */) {
+                return createSuperAccessInAsyncMethod(ts.createLiteral(ts.idText(node.name)), node);
+            }
+            return node;
+        }
+        function substituteElementAccessExpression(node) {
+            if (node.expression.kind === 97 /* SuperKeyword */) {
+                return createSuperAccessInAsyncMethod(node.argumentExpression, node);
+            }
+            return node;
+        }
+        function substituteCallExpression(node) {
+            var expression = node.expression;
+            if (ts.isSuperProperty(expression)) {
+                var argumentExpression = ts.isPropertyAccessExpression(expression)
+                    ? substitutePropertyAccessExpression(expression)
+                    : substituteElementAccessExpression(expression);
+                return ts.createCall(ts.createPropertyAccess(argumentExpression, "call"), 
+                /*typeArguments*/ undefined, [
+                    ts.createThis()
+                ].concat(node.arguments));
+            }
+            return node;
+        }
+        function isSuperContainer(node) {
+            var kind = node.kind;
+            return kind === 235 /* ClassDeclaration */
+                || kind === 155 /* Constructor */
+                || kind === 154 /* MethodDeclaration */
+                || kind === 156 /* GetAccessor */
+                || kind === 157 /* SetAccessor */;
+        }
+        function createSuperAccessInAsyncMethod(argumentExpression, location) {
+            if (enclosingSuperContainerFlags & 4096 /* AsyncMethodWithSuperBinding */) {
+                return ts.setTextRange(ts.createPropertyAccess(ts.createCall(ts.createIdentifier("_super"), 
+                /*typeArguments*/ undefined, [argumentExpression]), "value"), location);
+            }
+            else {
+                return ts.setTextRange(ts.createCall(ts.createIdentifier("_super"), 
+                /*typeArguments*/ undefined, [argumentExpression]), location);
+            }
+        }
+    }
+    ts.transformESNext = transformESNext;
+    var assignHelper = {
+        name: "typescript:assign",
+        scoped: false,
+        priority: 1,
+        text: "\n            var __assign = (this && this.__assign) || Object.assign || function(t) {\n                for (var s, i = 1, n = arguments.length; i < n; i++) {\n                    s = arguments[i];\n                    for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))\n                        t[p] = s[p];\n                }\n                return t;\n            };"
+    };
+    function createAssignHelper(context, attributesSegments) {
+        if (context.getCompilerOptions().target >= 2 /* ES2015 */) {
+            return ts.createCall(ts.createPropertyAccess(ts.createIdentifier("Object"), "assign"), 
+            /*typeArguments*/ undefined, attributesSegments);
+        }
+        context.requestEmitHelper(assignHelper);
+        return ts.createCall(ts.getHelperName("__assign"), 
+        /*typeArguments*/ undefined, attributesSegments);
+    }
+    ts.createAssignHelper = createAssignHelper;
+    var awaitHelper = {
+        name: "typescript:await",
+        scoped: false,
+        text: "\n            var __await = (this && this.__await) || function (v) { return this instanceof __await ? (this.v = v, this) : new __await(v); }"
+    };
+    function createAwaitHelper(context, expression) {
+        context.requestEmitHelper(awaitHelper);
+        return ts.createCall(ts.getHelperName("__await"), /*typeArguments*/ undefined, [expression]);
+    }
+    var asyncGeneratorHelper = {
+        name: "typescript:asyncGenerator",
+        scoped: false,
+        text: "\n            var __asyncGenerator = (this && this.__asyncGenerator) || function (thisArg, _arguments, generator) {\n                if (!Symbol.asyncIterator) throw new TypeError(\"Symbol.asyncIterator is not defined.\");\n                var g = generator.apply(thisArg, _arguments || []), i, q = [];\n                return i = {}, verb(\"next\"), verb(\"throw\"), verb(\"return\"), i[Symbol.asyncIterator] = function () { return this; }, i;\n                function verb(n) { if (g[n]) i[n] = function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]) > 1 || resume(n, v); }); }; }\n                function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(q[0][3], e); } }\n                function step(r) { r.value instanceof __await ? Promise.resolve(r.value.v).then(fulfill, reject) : settle(q[0][2], r); }\n                function fulfill(value) { resume(\"next\", value); }\n                function reject(value) { resume(\"throw\", value); }\n                function settle(f, v) { if (f(v), q.shift(), q.length) resume(q[0][0], q[0][1]); }\n            };"
+    };
+    function createAsyncGeneratorHelper(context, generatorFunc) {
+        context.requestEmitHelper(awaitHelper);
+        context.requestEmitHelper(asyncGeneratorHelper);
+        // Mark this node as originally an async function
+        (generatorFunc.emitNode || (generatorFunc.emitNode = {})).flags |= 262144 /* AsyncFunctionBody */;
+        return ts.createCall(ts.getHelperName("__asyncGenerator"), 
+        /*typeArguments*/ undefined, [
+            ts.createThis(),
+            ts.createIdentifier("arguments"),
+            generatorFunc
+        ]);
+    }
+    var asyncDelegator = {
+        name: "typescript:asyncDelegator",
+        scoped: false,
+        text: "\n            var __asyncDelegator = (this && this.__asyncDelegator) || function (o) {\n                var i, p;\n                return i = {}, verb(\"next\"), verb(\"throw\", function (e) { throw e; }), verb(\"return\"), i[Symbol.iterator] = function () { return this; }, i;\n                function verb(n, f) { i[n] = o[n] ? function (v) { return (p = !p) ? { value: __await(o[n](v)), done: n === \"return\" } : f ? f(v) : v; } : f; }\n            };"
+    };
+    function createAsyncDelegatorHelper(context, expression, location) {
+        context.requestEmitHelper(awaitHelper);
+        context.requestEmitHelper(asyncDelegator);
+        return ts.setTextRange(ts.createCall(ts.getHelperName("__asyncDelegator"), 
+        /*typeArguments*/ undefined, [expression]), location);
+    }
+    var asyncValues = {
+        name: "typescript:asyncValues",
+        scoped: false,
+        text: "\n            var __asyncValues = (this && this.__asyncValues) || function (o) {\n                if (!Symbol.asyncIterator) throw new TypeError(\"Symbol.asyncIterator is not defined.\");\n                var m = o[Symbol.asyncIterator], i;\n                return m ? m.call(o) : (o = typeof __values === \"function\" ? __values(o) : o[Symbol.iterator](), i = {}, verb(\"next\"), verb(\"throw\"), verb(\"return\"), i[Symbol.asyncIterator] = function () { return this; }, i);\n                function verb(n) { i[n] = o[n] && function (v) { return new Promise(function (resolve, reject) { v = o[n](v), settle(resolve, reject, v.done, v.value); }); }; }\n                function settle(resolve, reject, d, v) { Promise.resolve(v).then(function(v) { resolve({ value: v, done: d }); }, reject); }\n            };"
+    };
+    function createAsyncValuesHelper(context, expression, location) {
+        context.requestEmitHelper(asyncValues);
+        return ts.setTextRange(ts.createCall(ts.getHelperName("__asyncValues"), 
+        /*typeArguments*/ undefined, [expression]), location);
+    }
+})(ts || (ts = {}));
+/*@internal*/
+var ts;
+(function (ts) {
+    function transformJsx(context) {
+        var compilerOptions = context.getCompilerOptions();
+        var currentSourceFile;
+        return ts.chainBundle(transformSourceFile);
+        /**
+         * Transform JSX-specific syntax in a SourceFile.
+         *
+         * @param node A SourceFile node.
+         */
+        function transformSourceFile(node) {
+            if (node.isDeclarationFile) {
+                return node;
+            }
+            currentSourceFile = node;
+            var visited = ts.visitEachChild(node, visitor, context);
+            ts.addEmitHelpers(visited, context.readEmitHelpers());
+            return visited;
+        }
+        function visitor(node) {
+            if (node.transformFlags & 4 /* ContainsJsx */) {
+                return visitorWorker(node);
+            }
+            else {
+                return node;
+            }
+        }
+        function visitorWorker(node) {
+            switch (node.kind) {
+                case 255 /* JsxElement */:
+                    return visitJsxElement(node, /*isChild*/ false);
+                case 256 /* JsxSelfClosingElement */:
+                    return visitJsxSelfClosingElement(node, /*isChild*/ false);
+                case 259 /* JsxFragment */:
+                    return visitJsxFragment(node, /*isChild*/ false);
+                case 265 /* JsxExpression */:
+                    return visitJsxExpression(node);
+                default:
+                    return ts.visitEachChild(node, visitor, context);
+            }
+        }
+        function transformJsxChildToExpression(node) {
+            switch (node.kind) {
+                case 10 /* JsxText */:
+                    return visitJsxText(node);
+                case 265 /* JsxExpression */:
+                    return visitJsxExpression(node);
+                case 255 /* JsxElement */:
+                    return visitJsxElement(node, /*isChild*/ true);
+                case 256 /* JsxSelfClosingElement */:
+                    return visitJsxSelfClosingElement(node, /*isChild*/ true);
+                case 259 /* JsxFragment */:
+                    return visitJsxFragment(node, /*isChild*/ true);
+                default:
+                    return ts.Debug.failBadSyntaxKind(node);
+            }
+        }
+        function visitJsxElement(node, isChild) {
+            return visitJsxOpeningLikeElement(node.openingElement, node.children, isChild, /*location*/ node);
+        }
+        function visitJsxSelfClosingElement(node, isChild) {
+            return visitJsxOpeningLikeElement(node, /*children*/ undefined, isChild, /*location*/ node);
+        }
+        function visitJsxFragment(node, isChild) {
+            return visitJsxOpeningFragment(node.openingFragment, node.children, isChild, /*location*/ node);
+        }
+        function visitJsxOpeningLikeElement(node, children, isChild, location) {
+            var tagName = getTagName(node);
+            var objectProperties;
+            var attrs = node.attributes.properties;
+            if (attrs.length === 0) {
+                // When there are no attributes, React wants "null"
+                objectProperties = ts.createNull();
+            }
+            else {
+                // Map spans of JsxAttribute nodes into object literals and spans
+                // of JsxSpreadAttribute nodes into expressions.
+                var segments = ts.flatten(ts.spanMap(attrs, ts.isJsxSpreadAttribute, function (attrs, isSpread) { return isSpread
+                    ? ts.map(attrs, transformJsxSpreadAttributeToExpression)
+                    : ts.createObjectLiteral(ts.map(attrs, transformJsxAttributeToObjectLiteralElement)); }));
+                if (ts.isJsxSpreadAttribute(attrs[0])) {
+                    // We must always emit at least one object literal before a spread
+                    // argument.
+                    segments.unshift(ts.createObjectLiteral());
+                }
+                // Either emit one big object literal (no spread attribs), or
+                // a call to the __assign helper.
+                objectProperties = ts.singleOrUndefined(segments);
+                if (!objectProperties) {
+                    objectProperties = ts.createAssignHelper(context, segments);
+                }
+            }
+            var element = ts.createExpressionForJsxElement(context.getEmitResolver().getJsxFactoryEntity(currentSourceFile), compilerOptions.reactNamespace, // TODO: GH#18217
+            tagName, objectProperties, ts.mapDefined(children, transformJsxChildToExpression), node, location);
+            if (isChild) {
+                ts.startOnNewLine(element);
+            }
+            return element;
+        }
+        function visitJsxOpeningFragment(node, children, isChild, location) {
+            var element = ts.createExpressionForJsxFragment(context.getEmitResolver().getJsxFactoryEntity(currentSourceFile), compilerOptions.reactNamespace, // TODO: GH#18217
+            ts.mapDefined(children, transformJsxChildToExpression), node, location);
+            if (isChild) {
+                ts.startOnNewLine(element);
+            }
+            return element;
+        }
+        function transformJsxSpreadAttributeToExpression(node) {
+            return ts.visitNode(node.expression, visitor, ts.isExpression);
+        }
+        function transformJsxAttributeToObjectLiteralElement(node) {
+            var name = getAttributeName(node);
+            var expression = transformJsxAttributeInitializer(node.initializer);
+            return ts.createPropertyAssignment(name, expression);
+        }
+        function transformJsxAttributeInitializer(node) {
+            if (node === undefined) {
+                return ts.createTrue();
+            }
+            else if (node.kind === 9 /* StringLiteral */) {
+                // Always recreate the literal to escape any escape sequences or newlines which may be in the original jsx string and which
+                // Need to be escaped to be handled correctly in a normal string
+                var literal = ts.createLiteral(tryDecodeEntities(node.text) || node.text);
+                literal.singleQuote = node.singleQuote !== undefined ? node.singleQuote : !ts.isStringDoubleQuoted(node, currentSourceFile);
+                return ts.setTextRange(literal, node);
+            }
+            else if (node.kind === 265 /* JsxExpression */) {
+                if (node.expression === undefined) {
+                    return ts.createTrue();
+                }
+                return visitJsxExpression(node);
+            }
+            else {
+                return ts.Debug.failBadSyntaxKind(node);
+            }
+        }
+        function visitJsxText(node) {
+            var fixed = fixupWhitespaceAndDecodeEntities(ts.getTextOfNode(node, /*includeTrivia*/ true));
+            return fixed === undefined ? undefined : ts.createLiteral(fixed);
+        }
+        /**
+         * JSX trims whitespace at the end and beginning of lines, except that the
+         * start/end of a tag is considered a start/end of a line only if that line is
+         * on the same line as the closing tag. See examples in
+         * tests/cases/conformance/jsx/tsxReactEmitWhitespace.tsx
+         * See also https://www.w3.org/TR/html4/struct/text.html#h-9.1 and https://www.w3.org/TR/CSS2/text.html#white-space-model
+         *
+         * An equivalent algorithm would be:
+         * - If there is only one line, return it.
+         * - If there is only whitespace (but multiple lines), return `undefined`.
+         * - Split the text into lines.
+         * - 'trimRight' the first line, 'trimLeft' the last line, 'trim' middle lines.
+         * - Decode entities on each line (individually).
+         * - Remove empty lines and join the rest with " ".
+         */
+        function fixupWhitespaceAndDecodeEntities(text) {
+            var acc;
+            // First non-whitespace character on this line.
+            var firstNonWhitespace = 0;
+            // Last non-whitespace character on this line.
+            var lastNonWhitespace = -1;
+            // These initial values are special because the first line is:
+            // firstNonWhitespace = 0 to indicate that we want leading whitsepace,
+            // but lastNonWhitespace = -1 as a special flag to indicate that we *don't* include the line if it's all whitespace.
+            for (var i = 0; i < text.length; i++) {
+                var c = text.charCodeAt(i);
+                if (ts.isLineBreak(c)) {
+                    // If we've seen any non-whitespace characters on this line, add the 'trim' of the line.
+                    // (lastNonWhitespace === -1 is a special flag to detect whether the first line is all whitespace.)
+                    if (firstNonWhitespace !== -1 && lastNonWhitespace !== -1) {
+                        acc = addLineOfJsxText(acc, text.substr(firstNonWhitespace, lastNonWhitespace - firstNonWhitespace + 1));
+                    }
+                    // Reset firstNonWhitespace for the next line.
+                    // Don't bother to reset lastNonWhitespace because we ignore it if firstNonWhitespace = -1.
+                    firstNonWhitespace = -1;
+                }
+                else if (!ts.isWhiteSpaceSingleLine(c)) {
+                    lastNonWhitespace = i;
+                    if (firstNonWhitespace === -1) {
+                        firstNonWhitespace = i;
+                    }
+                }
+            }
+            return firstNonWhitespace !== -1
+                // Last line had a non-whitespace character. Emit the 'trimLeft', meaning keep trailing whitespace.
+                ? addLineOfJsxText(acc, text.substr(firstNonWhitespace))
+                // Last line was all whitespace, so ignore it
+                : acc;
+        }
+        function addLineOfJsxText(acc, trimmedLine) {
+            // We do not escape the string here as that is handled by the printer
+            // when it emits the literal. We do, however, need to decode JSX entities.
+            var decoded = decodeEntities(trimmedLine);
+            return acc === undefined ? decoded : acc + " " + decoded;
+        }
+        /**
+         * Replace entities like "&nbsp;", "&#123;", and "&#xDEADBEEF;" with the characters they encode.
+         * See https://en.wikipedia.org/wiki/List_of_XML_and_HTML_character_entity_references
+         */
+        function decodeEntities(text) {
+            return text.replace(/&((#((\d+)|x([\da-fA-F]+)))|(\w+));/g, function (match, _all, _number, _digits, decimal, hex, word) {
+                if (decimal) {
+                    return String.fromCharCode(parseInt(decimal, 10));
+                }
+                else if (hex) {
+                    return String.fromCharCode(parseInt(hex, 16));
+                }
+                else {
+                    var ch = entities.get(word);
+                    // If this is not a valid entity, then just use `match` (replace it with itself, i.e. don't replace)
+                    return ch ? String.fromCharCode(ch) : match;
+                }
+            });
+        }
+        /** Like `decodeEntities` but returns `undefined` if there were no entities to decode. */
+        function tryDecodeEntities(text) {
+            var decoded = decodeEntities(text);
+            return decoded === text ? undefined : decoded;
+        }
+        function getTagName(node) {
+            if (node.kind === 255 /* JsxElement */) {
+                return getTagName(node.openingElement);
+            }
+            else {
+                var name = node.tagName;
+                if (ts.isIdentifier(name) && ts.isIntrinsicJsxName(name.escapedText)) {
+                    return ts.createLiteral(ts.idText(name));
+                }
+                else {
+                    return ts.createExpressionFromEntityName(name);
+                }
+            }
+        }
+        /**
+         * Emit an attribute name, which is quoted if it needs to be quoted. Because
+         * these emit into an object literal property name, we don't need to be worried
+         * about keywords, just non-identifier characters
+         */
+        function getAttributeName(node) {
+            var name = node.name;
+            var text = ts.idText(name);
+            if (/^[A-Za-z_]\w*$/.test(text)) {
+                return name;
+            }
+            else {
+                return ts.createLiteral(text);
+            }
+        }
+        function visitJsxExpression(node) {
+            return ts.visitNode(node.expression, visitor, ts.isExpression);
+        }
+    }
+    ts.transformJsx = transformJsx;
+    var entities = ts.createMapFromTemplate({
+        quot: 0x0022,
+        amp: 0x0026,
+        apos: 0x0027,
+        lt: 0x003C,
+        gt: 0x003E,
+        nbsp: 0x00A0,
+        iexcl: 0x00A1,
+        cent: 0x00A2,
+        pound: 0x00A3,
+        curren: 0x00A4,
+        yen: 0x00A5,
+        brvbar: 0x00A6,
+        sect: 0x00A7,
+        uml: 0x00A8,
+        copy: 0x00A9,
+        ordf: 0x00AA,
+        laquo: 0x00AB,
+        not: 0x00AC,
+        shy: 0x00AD,
+        reg: 0x00AE,
+        macr: 0x00AF,
+        deg: 0x00B0,
+        plusmn: 0x00B1,
+        sup2: 0x00B2,
+        sup3: 0x00B3,
+        acute: 0x00B4,
+        micro: 0x00B5,
+        para: 0x00B6,
+        middot: 0x00B7,
+        cedil: 0x00B8,
+        sup1: 0x00B9,
+        ordm: 0x00BA,
+        raquo: 0x00BB,
+        frac14: 0x00BC,
+        frac12: 0x00BD,
+        frac34: 0x00BE,
+        iquest: 0x00BF,
+        Agrave: 0x00C0,
+        Aacute: 0x00C1,
+        Acirc: 0x00C2,
+        Atilde: 0x00C3,
+        Auml: 0x00C4,
+        Aring: 0x00C5,
+        AElig: 0x00C6,
+        Ccedil: 0x00C7,
+        Egrave: 0x00C8,
+        Eacute: 0x00C9,
+        Ecirc: 0x00CA,
+        Euml: 0x00CB,
+        Igrave: 0x00CC,
+        Iacute: 0x00CD,
+        Icirc: 0x00CE,
+        Iuml: 0x00CF,
+        ETH: 0x00D0,
+        Ntilde: 0x00D1,
+        Ograve: 0x00D2,
+        Oacute: 0x00D3,
+        Ocirc: 0x00D4,
+        Otilde: 0x00D5,
+        Ouml: 0x00D6,
+        times: 0x00D7,
+        Oslash: 0x00D8,
+        Ugrave: 0x00D9,
+        Uacute: 0x00DA,
+        Ucirc: 0x00DB,
+        Uuml: 0x00DC,
+        Yacute: 0x00DD,
+        THORN: 0x00DE,
+        szlig: 0x00DF,
+        agrave: 0x00E0,
+        aacute: 0x00E1,
+        acirc: 0x00E2,
+        atilde: 0x00E3,
+        auml: 0x00E4,
+        aring: 0x00E5,
+        aelig: 0x00E6,
+        ccedil: 0x00E7,
+        egrave: 0x00E8,
+        eacute: 0x00E9,
+        ecirc: 0x00EA,
+        euml: 0x00EB,
+        igrave: 0x00EC,
+        iacute: 0x00ED,
+        icirc: 0x00EE,
+        iuml: 0x00EF,
+        eth: 0x00F0,
+        ntilde: 0x00F1,
+        ograve: 0x00F2,
+        oacute: 0x00F3,
+        ocirc: 0x00F4,
+        otilde: 0x00F5,
+        ouml: 0x00F6,
+        divide: 0x00F7,
+        oslash: 0x00F8,
+        ugrave: 0x00F9,
+        uacute: 0x00FA,
+        ucirc: 0x00FB,
+        uuml: 0x00FC,
+        yacute: 0x00FD,
+        thorn: 0x00FE,
+        yuml: 0x00FF,
+        OElig: 0x0152,
+        oelig: 0x0153,
+        Scaron: 0x0160,
+        scaron: 0x0161,
+        Yuml: 0x0178,
+        fnof: 0x0192,
+        circ: 0x02C6,
+        tilde: 0x02DC,
+        Alpha: 0x0391,
+        Beta: 0x0392,
+        Gamma: 0x0393,
+        Delta: 0x0394,
+        Epsilon: 0x0395,
+        Zeta: 0x0396,
+        Eta: 0x0397,
+        Theta: 0x0398,
+        Iota: 0x0399,
+        Kappa: 0x039A,
+        Lambda: 0x039B,
+        Mu: 0x039C,
+        Nu: 0x039D,
+        Xi: 0x039E,
+        Omicron: 0x039F,
+        Pi: 0x03A0,
+        Rho: 0x03A1,
+        Sigma: 0x03A3,
+        Tau: 0x03A4,
+        Upsilon: 0x03A5,
+        Phi: 0x03A6,
+        Chi: 0x03A7,
+        Psi: 0x03A8,
+        Omega: 0x03A9,
+        alpha: 0x03B1,
+        beta: 0x03B2,
+        gamma: 0x03B3,
+        delta: 0x03B4,
+        epsilon: 0x03B5,
+        zeta: 0x03B6,
+        eta: 0x03B7,
+        theta: 0x03B8,
+        iota: 0x03B9,
+        kappa: 0x03BA,
+        lambda: 0x03BB,
+        mu: 0x03BC,
+        nu: 0x03BD,
+        xi: 0x03BE,
+        omicron: 0x03BF,
+        pi: 0x03C0,
+        rho: 0x03C1,
+        sigmaf: 0x03C2,
+        sigma: 0x03C3,
+        tau: 0x03C4,
+        upsilon: 0x03C5,
+        phi: 0x03C6,
+        chi: 0x03C7,
+        psi: 0x03C8,
+        omega: 0x03C9,
+        thetasym: 0x03D1,
+        upsih: 0x03D2,
+        piv: 0x03D6,
+        ensp: 0x2002,
+        emsp: 0x2003,
+        thinsp: 0x2009,
+        zwnj: 0x200C,
+        zwj: 0x200D,
+        lrm: 0x200E,
+        rlm: 0x200F,
+        ndash: 0x2013,
+        mdash: 0x2014,
+        lsquo: 0x2018,
+        rsquo: 0x2019,
+        sbquo: 0x201A,
+        ldquo: 0x201C,
+        rdquo: 0x201D,
+        bdquo: 0x201E,
+        dagger: 0x2020,
+        Dagger: 0x2021,
+        bull: 0x2022,
+        hellip: 0x2026,
+        permil: 0x2030,
+        prime: 0x2032,
+        Prime: 0x2033,
+        lsaquo: 0x2039,
+        rsaquo: 0x203A,
+        oline: 0x203E,
+        frasl: 0x2044,
+        euro: 0x20AC,
+        image: 0x2111,
+        weierp: 0x2118,
+        real: 0x211C,
+        trade: 0x2122,
+        alefsym: 0x2135,
+        larr: 0x2190,
+        uarr: 0x2191,
+        rarr: 0x2192,
+        darr: 0x2193,
+        harr: 0x2194,
+        crarr: 0x21B5,
+        lArr: 0x21D0,
+        uArr: 0x21D1,
+        rArr: 0x21D2,
+        dArr: 0x21D3,
+        hArr: 0x21D4,
+        forall: 0x2200,
+        part: 0x2202,
+        exist: 0x2203,
+        empty: 0x2205,
+        nabla: 0x2207,
+        isin: 0x2208,
+        notin: 0x2209,
+        ni: 0x220B,
+        prod: 0x220F,
+        sum: 0x2211,
+        minus: 0x2212,
+        lowast: 0x2217,
+        radic: 0x221A,
+        prop: 0x221D,
+        infin: 0x221E,
+        ang: 0x2220,
+        and: 0x2227,
+        or: 0x2228,
+        cap: 0x2229,
+        cup: 0x222A,
+        int: 0x222B,
+        there4: 0x2234,
+        sim: 0x223C,
+        cong: 0x2245,
+        asymp: 0x2248,
+        ne: 0x2260,
+        equiv: 0x2261,
+        le: 0x2264,
+        ge: 0x2265,
+        sub: 0x2282,
+        sup: 0x2283,
+        nsub: 0x2284,
+        sube: 0x2286,
+        supe: 0x2287,
+        oplus: 0x2295,
+        otimes: 0x2297,
+        perp: 0x22A5,
+        sdot: 0x22C5,
+        lceil: 0x2308,
+        rceil: 0x2309,
+        lfloor: 0x230A,
+        rfloor: 0x230B,
+        lang: 0x2329,
+        rang: 0x232A,
+        loz: 0x25CA,
+        spades: 0x2660,
+        clubs: 0x2663,
+        hearts: 0x2665,
+        diams: 0x2666
+    });
+})(ts || (ts = {}));
+/*@internal*/
+var ts;
+(function (ts) {
+    function transformES2016(context) {
+        var hoistVariableDeclaration = context.hoistVariableDeclaration;
+        return ts.chainBundle(transformSourceFile);
+        function transformSourceFile(node) {
+            if (node.isDeclarationFile) {
+                return node;
+            }
+            return ts.visitEachChild(node, visitor, context);
+        }
+        function visitor(node) {
+            if ((node.transformFlags & 32 /* ContainsES2016 */) === 0) {
+                return node;
+            }
+            switch (node.kind) {
+                case 200 /* BinaryExpression */:
+                    return visitBinaryExpression(node);
+                default:
+                    return ts.visitEachChild(node, visitor, context);
+            }
+        }
+        function visitBinaryExpression(node) {
+            switch (node.operatorToken.kind) {
+                case 62 /* AsteriskAsteriskEqualsToken */:
+                    return visitExponentiationAssignmentExpression(node);
+                case 40 /* AsteriskAsteriskToken */:
+                    return visitExponentiationExpression(node);
+                default:
+                    return ts.visitEachChild(node, visitor, context);
+            }
+        }
+        function visitExponentiationAssignmentExpression(node) {
+            var target;
+            var value;
+            var left = ts.visitNode(node.left, visitor, ts.isExpression);
+            var right = ts.visitNode(node.right, visitor, ts.isExpression);
+            if (ts.isElementAccessExpression(left)) {
+                // Transforms `a[x] **= b` into `(_a = a)[_x = x] = Math.pow(_a[_x], b)`
+                var expressionTemp = ts.createTempVariable(hoistVariableDeclaration);
+                var argumentExpressionTemp = ts.createTempVariable(hoistVariableDeclaration);
+                target = ts.setTextRange(ts.createElementAccess(ts.setTextRange(ts.createAssignment(expressionTemp, left.expression), left.expression), ts.setTextRange(ts.createAssignment(argumentExpressionTemp, left.argumentExpression), left.argumentExpression)), left);
+                value = ts.setTextRange(ts.createElementAccess(expressionTemp, argumentExpressionTemp), left);
+            }
+            else if (ts.isPropertyAccessExpression(left)) {
+                // Transforms `a.x **= b` into `(_a = a).x = Math.pow(_a.x, b)`
+                var expressionTemp = ts.createTempVariable(hoistVariableDeclaration);
+                target = ts.setTextRange(ts.createPropertyAccess(ts.setTextRange(ts.createAssignment(expressionTemp, left.expression), left.expression), left.name), left);
+                value = ts.setTextRange(ts.createPropertyAccess(expressionTemp, left.name), left);
+            }
+            else {
+                // Transforms `a **= b` into `a = Math.pow(a, b)`
+                target = left;
+                value = left;
+            }
+            return ts.setTextRange(ts.createAssignment(target, ts.createMathPow(value, right, /*location*/ node)), node);
+        }
+        function visitExponentiationExpression(node) {
+            // Transforms `a ** b` into `Math.pow(a, b)`
+            var left = ts.visitNode(node.left, visitor, ts.isExpression);
+            var right = ts.visitNode(node.right, visitor, ts.isExpression);
+            return ts.createMathPow(left, right, /*location*/ node);
+        }
+    }
+    ts.transformES2016 = transformES2016;
+})(ts || (ts = {}));
+/*@internal*/
+var ts;
+(function (ts) {
+    var ES2015SubstitutionFlags;
+    (function (ES2015SubstitutionFlags) {
+        /** Enables substitutions for captured `this` */
+        ES2015SubstitutionFlags[ES2015SubstitutionFlags["CapturedThis"] = 1] = "CapturedThis";
+        /** Enables substitutions for block-scoped bindings. */
+        ES2015SubstitutionFlags[ES2015SubstitutionFlags["BlockScopedBindings"] = 2] = "BlockScopedBindings";
+    })(ES2015SubstitutionFlags || (ES2015SubstitutionFlags = {}));
+    var CopyDirection;
+    (function (CopyDirection) {
+        CopyDirection[CopyDirection["ToOriginal"] = 0] = "ToOriginal";
+        CopyDirection[CopyDirection["ToOutParameter"] = 1] = "ToOutParameter";
+    })(CopyDirection || (CopyDirection = {}));
+    var Jump;
+    (function (Jump) {
+        Jump[Jump["Break"] = 2] = "Break";
+        Jump[Jump["Continue"] = 4] = "Continue";
+        Jump[Jump["Return"] = 8] = "Return";
+    })(Jump || (Jump = {}));
+    var SuperCaptureResult;
+    (function (SuperCaptureResult) {
+        /**
+         * A capture may have been added for calls to 'super', but
+         * the caller should emit subsequent statements normally.
+         */
+        SuperCaptureResult[SuperCaptureResult["NoReplacement"] = 0] = "NoReplacement";
+        /**
+         * A call to 'super()' got replaced with a capturing statement like:
+         *
+         *  var _this = _super.call(...) || this;
+         *
+         * Callers should skip the current statement.
+         */
+        SuperCaptureResult[SuperCaptureResult["ReplaceSuperCapture"] = 1] = "ReplaceSuperCapture";
+        /**
+         * A call to 'super()' got replaced with a capturing statement like:
+         *
+         *  return _super.call(...) || this;
+         *
+         * Callers should skip the current statement and avoid any returns of '_this'.
+         */
+        SuperCaptureResult[SuperCaptureResult["ReplaceWithReturn"] = 2] = "ReplaceWithReturn";
+    })(SuperCaptureResult || (SuperCaptureResult = {}));
+    // Facts we track as we traverse the tree
+    var HierarchyFacts;
+    (function (HierarchyFacts) {
+        HierarchyFacts[HierarchyFacts["None"] = 0] = "None";
+        //
+        // Ancestor facts
+        //
+        HierarchyFacts[HierarchyFacts["Function"] = 1] = "Function";
+        HierarchyFacts[HierarchyFacts["ArrowFunction"] = 2] = "ArrowFunction";
+        HierarchyFacts[HierarchyFacts["AsyncFunctionBody"] = 4] = "AsyncFunctionBody";
+        HierarchyFacts[HierarchyFacts["NonStaticClassElement"] = 8] = "NonStaticClassElement";
+        HierarchyFacts[HierarchyFacts["CapturesThis"] = 16] = "CapturesThis";
+        HierarchyFacts[HierarchyFacts["ExportedVariableStatement"] = 32] = "ExportedVariableStatement";
+        HierarchyFacts[HierarchyFacts["TopLevel"] = 64] = "TopLevel";
+        HierarchyFacts[HierarchyFacts["Block"] = 128] = "Block";
+        HierarchyFacts[HierarchyFacts["IterationStatement"] = 256] = "IterationStatement";
+        HierarchyFacts[HierarchyFacts["IterationStatementBlock"] = 512] = "IterationStatementBlock";
+        HierarchyFacts[HierarchyFacts["ForStatement"] = 1024] = "ForStatement";
+        HierarchyFacts[HierarchyFacts["ForInOrForOfStatement"] = 2048] = "ForInOrForOfStatement";
+        HierarchyFacts[HierarchyFacts["ConstructorWithCapturedSuper"] = 4096] = "ConstructorWithCapturedSuper";
+        HierarchyFacts[HierarchyFacts["ComputedPropertyName"] = 8192] = "ComputedPropertyName";
+        // NOTE: do not add more ancestor flags without also updating AncestorFactsMask below.
+        //
+        // Ancestor masks
+        //
+        HierarchyFacts[HierarchyFacts["AncestorFactsMask"] = 16383] = "AncestorFactsMask";
+        // We are always in *some* kind of block scope, but only specific block-scope containers are
+        // top-level or Blocks.
+        HierarchyFacts[HierarchyFacts["BlockScopeIncludes"] = 0] = "BlockScopeIncludes";
+        HierarchyFacts[HierarchyFacts["BlockScopeExcludes"] = 4032] = "BlockScopeExcludes";
+        // A source file is a top-level block scope.
+        HierarchyFacts[HierarchyFacts["SourceFileIncludes"] = 64] = "SourceFileIncludes";
+        HierarchyFacts[HierarchyFacts["SourceFileExcludes"] = 3968] = "SourceFileExcludes";
+        // Functions, methods, and accessors are both new lexical scopes and new block scopes.
+        HierarchyFacts[HierarchyFacts["FunctionIncludes"] = 65] = "FunctionIncludes";
+        HierarchyFacts[HierarchyFacts["FunctionExcludes"] = 16286] = "FunctionExcludes";
+        HierarchyFacts[HierarchyFacts["AsyncFunctionBodyIncludes"] = 69] = "AsyncFunctionBodyIncludes";
+        HierarchyFacts[HierarchyFacts["AsyncFunctionBodyExcludes"] = 16278] = "AsyncFunctionBodyExcludes";
+        // Arrow functions are lexically scoped to their container, but are new block scopes.
+        HierarchyFacts[HierarchyFacts["ArrowFunctionIncludes"] = 66] = "ArrowFunctionIncludes";
+        HierarchyFacts[HierarchyFacts["ArrowFunctionExcludes"] = 16256] = "ArrowFunctionExcludes";
+        // Constructors are both new lexical scopes and new block scopes. Constructors are also
+        // always considered non-static members of a class.
+        HierarchyFacts[HierarchyFacts["ConstructorIncludes"] = 73] = "ConstructorIncludes";
+        HierarchyFacts[HierarchyFacts["ConstructorExcludes"] = 16278] = "ConstructorExcludes";
+        // 'do' and 'while' statements are not block scopes. We track that the subtree is contained
+        // within an IterationStatement to indicate whether the embedded statement is an
+        // IterationStatementBlock.
+        HierarchyFacts[HierarchyFacts["DoOrWhileStatementIncludes"] = 256] = "DoOrWhileStatementIncludes";
+        HierarchyFacts[HierarchyFacts["DoOrWhileStatementExcludes"] = 0] = "DoOrWhileStatementExcludes";
+        // 'for' statements are new block scopes and have special handling for 'let' declarations.
+        HierarchyFacts[HierarchyFacts["ForStatementIncludes"] = 1280] = "ForStatementIncludes";
+        HierarchyFacts[HierarchyFacts["ForStatementExcludes"] = 3008] = "ForStatementExcludes";
+        // 'for-in' and 'for-of' statements are new block scopes and have special handling for
+        // 'let' declarations.
+        HierarchyFacts[HierarchyFacts["ForInOrForOfStatementIncludes"] = 2304] = "ForInOrForOfStatementIncludes";
+        HierarchyFacts[HierarchyFacts["ForInOrForOfStatementExcludes"] = 1984] = "ForInOrForOfStatementExcludes";
+        // Blocks (other than function bodies) are new block scopes.
+        HierarchyFacts[HierarchyFacts["BlockIncludes"] = 128] = "BlockIncludes";
+        HierarchyFacts[HierarchyFacts["BlockExcludes"] = 3904] = "BlockExcludes";
+        HierarchyFacts[HierarchyFacts["IterationStatementBlockIncludes"] = 512] = "IterationStatementBlockIncludes";
+        HierarchyFacts[HierarchyFacts["IterationStatementBlockExcludes"] = 4032] = "IterationStatementBlockExcludes";
+        // Computed property names track subtree flags differently than their containing members.
+        HierarchyFacts[HierarchyFacts["ComputedPropertyNameIncludes"] = 8192] = "ComputedPropertyNameIncludes";
+        HierarchyFacts[HierarchyFacts["ComputedPropertyNameExcludes"] = 0] = "ComputedPropertyNameExcludes";
+        //
+        // Subtree facts
+        //
+        HierarchyFacts[HierarchyFacts["NewTarget"] = 16384] = "NewTarget";
+        HierarchyFacts[HierarchyFacts["NewTargetInComputedPropertyName"] = 32768] = "NewTargetInComputedPropertyName";
+        //
+        // Subtree masks
+        //
+        HierarchyFacts[HierarchyFacts["SubtreeFactsMask"] = -16384] = "SubtreeFactsMask";
+        HierarchyFacts[HierarchyFacts["PropagateNewTargetMask"] = 49152] = "PropagateNewTargetMask";
+    })(HierarchyFacts || (HierarchyFacts = {}));
+    function transformES2015(context) {
+        var startLexicalEnvironment = context.startLexicalEnvironment, resumeLexicalEnvironment = context.resumeLexicalEnvironment, endLexicalEnvironment = context.endLexicalEnvironment, hoistVariableDeclaration = context.hoistVariableDeclaration;
+        var compilerOptions = context.getCompilerOptions();
+        var resolver = context.getEmitResolver();
+        var previousOnSubstituteNode = context.onSubstituteNode;
+        var previousOnEmitNode = context.onEmitNode;
+        context.onEmitNode = onEmitNode;
+        context.onSubstituteNode = onSubstituteNode;
+        var currentSourceFile;
+        var currentText;
+        var hierarchyFacts;
+        var taggedTemplateStringDeclarations;
+        function recordTaggedTemplateString(temp) {
+            taggedTemplateStringDeclarations = ts.append(taggedTemplateStringDeclarations, ts.createVariableDeclaration(temp));
+        }
+        /**
+         * Used to track if we are emitting body of the converted loop
+         */
+        var convertedLoopState;
+        /**
+         * Keeps track of whether substitutions have been enabled for specific cases.
+         * They are persisted between each SourceFile transformation and should not
+         * be reset.
+         */
+        var enabledSubstitutions;
+        return ts.chainBundle(transformSourceFile);
+        function transformSourceFile(node) {
+            if (node.isDeclarationFile) {
+                return node;
+            }
+            currentSourceFile = node;
+            currentText = node.text;
+            var visited = visitSourceFile(node);
+            ts.addEmitHelpers(visited, context.readEmitHelpers());
+            currentSourceFile = undefined;
+            currentText = undefined;
+            taggedTemplateStringDeclarations = undefined;
+            hierarchyFacts = 0 /* None */;
+            return visited;
+        }
+        /**
+         * Sets the `HierarchyFacts` for this node prior to visiting this node's subtree, returning the facts set prior to modification.
+         * @param excludeFacts The existing `HierarchyFacts` to reset before visiting the subtree.
+         * @param includeFacts The new `HierarchyFacts` to set before visiting the subtree.
+         */
+        function enterSubtree(excludeFacts, includeFacts) {
+            var ancestorFacts = hierarchyFacts;
+            hierarchyFacts = (hierarchyFacts & ~excludeFacts | includeFacts) & 16383 /* AncestorFactsMask */;
+            return ancestorFacts;
+        }
+        /**
+         * Restores the `HierarchyFacts` for this node's ancestor after visiting this node's
+         * subtree, propagating specific facts from the subtree.
+         * @param ancestorFacts The `HierarchyFacts` of the ancestor to restore after visiting the subtree.
+         * @param excludeFacts The existing `HierarchyFacts` of the subtree that should not be propagated.
+         * @param includeFacts The new `HierarchyFacts` of the subtree that should be propagated.
+         */
+        function exitSubtree(ancestorFacts, excludeFacts, includeFacts) {
+            hierarchyFacts = (hierarchyFacts & ~excludeFacts | includeFacts) & -16384 /* SubtreeFactsMask */ | ancestorFacts;
+        }
+        function isReturnVoidStatementInConstructorWithCapturedSuper(node) {
+            return (hierarchyFacts & 4096 /* ConstructorWithCapturedSuper */) !== 0
+                && node.kind === 225 /* ReturnStatement */
+                && !node.expression;
+        }
+        function shouldVisitNode(node) {
+            return (node.transformFlags & 128 /* ContainsES2015 */) !== 0
+                || convertedLoopState !== undefined
+                || (hierarchyFacts & 4096 /* ConstructorWithCapturedSuper */ && (ts.isStatement(node) || (node.kind === 213 /* Block */)))
+                || (ts.isIterationStatement(node, /*lookInLabeledStatements*/ false) && shouldConvertIterationStatementBody(node))
+                || (ts.getEmitFlags(node) & 33554432 /* TypeScriptClassWrapper */) !== 0;
+        }
+        function visitor(node) {
+            if (shouldVisitNode(node)) {
+                return visitJavaScript(node);
+            }
+            else {
+                return node;
+            }
+        }
+        function functionBodyVisitor(node) {
+            if (shouldVisitNode(node)) {
+                return visitBlock(node, /*isFunctionBody*/ true);
+            }
+            return node;
+        }
+        function callExpressionVisitor(node) {
+            if (node.kind === 97 /* SuperKeyword */) {
+                return visitSuperKeyword(/*isExpressionOfCall*/ true);
+            }
+            return visitor(node);
+        }
+        function visitJavaScript(node) {
+            switch (node.kind) {
+                case 115 /* StaticKeyword */:
+                    return undefined; // elide static keyword
+                case 235 /* ClassDeclaration */:
+                    return visitClassDeclaration(node);
+                case 205 /* ClassExpression */:
+                    return visitClassExpression(node);
+                case 149 /* Parameter */:
+                    return visitParameter(node);
+                case 234 /* FunctionDeclaration */:
+                    return visitFunctionDeclaration(node);
+                case 193 /* ArrowFunction */:
+                    return visitArrowFunction(node);
+                case 192 /* FunctionExpression */:
+                    return visitFunctionExpression(node);
+                case 232 /* VariableDeclaration */:
+                    return visitVariableDeclaration(node);
+                case 71 /* Identifier */:
+                    return visitIdentifier(node);
+                case 233 /* VariableDeclarationList */:
+                    return visitVariableDeclarationList(node);
+                case 227 /* SwitchStatement */:
+                    return visitSwitchStatement(node);
+                case 241 /* CaseBlock */:
+                    return visitCaseBlock(node);
+                case 213 /* Block */:
+                    return visitBlock(node, /*isFunctionBody*/ false);
+                case 224 /* BreakStatement */:
+                case 223 /* ContinueStatement */:
+                    return visitBreakOrContinueStatement(node);
+                case 228 /* LabeledStatement */:
+                    return visitLabeledStatement(node);
+                case 218 /* DoStatement */:
+                case 219 /* WhileStatement */:
+                    return visitDoOrWhileStatement(node, /*outermostLabeledStatement*/ undefined);
+                case 220 /* ForStatement */:
+                    return visitForStatement(node, /*outermostLabeledStatement*/ undefined);
+                case 221 /* ForInStatement */:
+                    return visitForInStatement(node, /*outermostLabeledStatement*/ undefined);
+                case 222 /* ForOfStatement */:
+                    return visitForOfStatement(node, /*outermostLabeledStatement*/ undefined);
+                case 216 /* ExpressionStatement */:
+                    return visitExpressionStatement(node);
+                case 184 /* ObjectLiteralExpression */:
+                    return visitObjectLiteralExpression(node);
+                case 269 /* CatchClause */:
+                    return visitCatchClause(node);
+                case 271 /* ShorthandPropertyAssignment */:
+                    return visitShorthandPropertyAssignment(node);
+                case 147 /* ComputedPropertyName */:
+                    return visitComputedPropertyName(node);
+                case 183 /* ArrayLiteralExpression */:
+                    return visitArrayLiteralExpression(node);
+                case 187 /* CallExpression */:
+                    return visitCallExpression(node);
+                case 188 /* NewExpression */:
+                    return visitNewExpression(node);
+                case 191 /* ParenthesizedExpression */:
+                    return visitParenthesizedExpression(node, /*needsDestructuringValue*/ true);
+                case 200 /* BinaryExpression */:
+                    return visitBinaryExpression(node, /*needsDestructuringValue*/ true);
+                case 13 /* NoSubstitutionTemplateLiteral */:
+                case 14 /* TemplateHead */:
+                case 15 /* TemplateMiddle */:
+                case 16 /* TemplateTail */:
+                    return visitTemplateLiteral(node);
+                case 9 /* StringLiteral */:
+                    return visitStringLiteral(node);
+                case 8 /* NumericLiteral */:
+                    return visitNumericLiteral(node);
+                case 189 /* TaggedTemplateExpression */:
+                    return visitTaggedTemplateExpression(node);
+                case 202 /* TemplateExpression */:
+                    return visitTemplateExpression(node);
+                case 203 /* YieldExpression */:
+                    return visitYieldExpression(node);
+                case 204 /* SpreadElement */:
+                    return visitSpreadElement(node);
+                case 97 /* SuperKeyword */:
+                    return visitSuperKeyword(/*isExpressionOfCall*/ false);
+                case 99 /* ThisKeyword */:
+                    return visitThisKeyword(node);
+                case 210 /* MetaProperty */:
+                    return visitMetaProperty(node);
+                case 154 /* MethodDeclaration */:
+                    return visitMethodDeclaration(node);
+                case 156 /* GetAccessor */:
+                case 157 /* SetAccessor */:
+                    return visitAccessorDeclaration(node);
+                case 214 /* VariableStatement */:
+                    return visitVariableStatement(node);
+                case 225 /* ReturnStatement */:
+                    return visitReturnStatement(node);
+                default:
+                    return ts.visitEachChild(node, visitor, context);
+            }
+        }
+        function visitSourceFile(node) {
+            var ancestorFacts = enterSubtree(3968 /* SourceFileExcludes */, 64 /* SourceFileIncludes */);
+            var statements = [];
+            startLexicalEnvironment();
+            var statementOffset = ts.addStandardPrologue(statements, node.statements, /*ensureUseStrict*/ false);
+            addCaptureThisForNodeIfNeeded(statements, node);
+            statementOffset = ts.addCustomPrologue(statements, node.statements, statementOffset, visitor);
+            ts.addRange(statements, ts.visitNodes(node.statements, visitor, ts.isStatement, statementOffset));
+            if (taggedTemplateStringDeclarations) {
+                statements.push(ts.createVariableStatement(/*modifiers*/ undefined, ts.createVariableDeclarationList(taggedTemplateStringDeclarations)));
+            }
+            ts.prependStatements(statements, endLexicalEnvironment());
+            exitSubtree(ancestorFacts, 0 /* None */, 0 /* None */);
+            return ts.updateSourceFileNode(node, ts.setTextRange(ts.createNodeArray(statements), node.statements));
+        }
+        function visitSwitchStatement(node) {
+            if (convertedLoopState !== undefined) {
+                var savedAllowedNonLabeledJumps = convertedLoopState.allowedNonLabeledJumps;
+                // for switch statement allow only non-labeled break
+                convertedLoopState.allowedNonLabeledJumps |= 2 /* Break */;
+                var result = ts.visitEachChild(node, visitor, context);
+                convertedLoopState.allowedNonLabeledJumps = savedAllowedNonLabeledJumps;
+                return result;
+            }
+            return ts.visitEachChild(node, visitor, context);
+        }
+        function visitCaseBlock(node) {
+            var ancestorFacts = enterSubtree(4032 /* BlockScopeExcludes */, 0 /* BlockScopeIncludes */);
+            var updated = ts.visitEachChild(node, visitor, context);
+            exitSubtree(ancestorFacts, 0 /* None */, 0 /* None */);
+            return updated;
+        }
+        function returnCapturedThis(node) {
+            return ts.setOriginalNode(ts.createReturn(ts.createFileLevelUniqueName("_this")), node);
+        }
+        function visitReturnStatement(node) {
+            if (convertedLoopState) {
+                convertedLoopState.nonLocalJumps |= 8 /* Return */;
+                if (isReturnVoidStatementInConstructorWithCapturedSuper(node)) {
+                    node = returnCapturedThis(node);
+                }
+                return ts.createReturn(ts.createObjectLiteral([
+                    ts.createPropertyAssignment(ts.createIdentifier("value"), node.expression
+                        ? ts.visitNode(node.expression, visitor, ts.isExpression)
+                        : ts.createVoidZero())
+                ]));
+            }
+            else if (isReturnVoidStatementInConstructorWithCapturedSuper(node)) {
+                return returnCapturedThis(node);
+            }
+            return ts.visitEachChild(node, visitor, context);
+        }
+        function visitThisKeyword(node) {
+            if (convertedLoopState) {
+                if (hierarchyFacts & 2 /* ArrowFunction */) {
+                    // if the enclosing function is an ArrowFunction then we use the captured 'this' keyword.
+                    convertedLoopState.containsLexicalThis = true;
+                    return node;
+                }
+                return convertedLoopState.thisName || (convertedLoopState.thisName = ts.createUniqueName("this"));
+            }
+            return node;
+        }
+        function visitIdentifier(node) {
+            if (!convertedLoopState) {
+                return node;
+            }
+            if (ts.isGeneratedIdentifier(node)) {
+                return node;
+            }
+            if (node.escapedText !== "arguments" || !resolver.isArgumentsLocalBinding(node)) {
+                return node;
+            }
+            return convertedLoopState.argumentsName || (convertedLoopState.argumentsName = ts.createUniqueName("arguments"));
+        }
+        function visitBreakOrContinueStatement(node) {
+            if (convertedLoopState) {
+                // check if we can emit break/continue as is
+                // it is possible if either
+                //   - break/continue is labeled and label is located inside the converted loop
+                //   - break/continue is non-labeled and located in non-converted loop/switch statement
+                var jump = node.kind === 224 /* BreakStatement */ ? 2 /* Break */ : 4 /* Continue */;
+                var canUseBreakOrContinue = (node.label && convertedLoopState.labels && convertedLoopState.labels.get(ts.idText(node.label))) ||
+                    (!node.label && (convertedLoopState.allowedNonLabeledJumps & jump));
+                if (!canUseBreakOrContinue) {
+                    var labelMarker = void 0;
+                    var label = node.label;
+                    if (!label) {
+                        if (node.kind === 224 /* BreakStatement */) {
+                            convertedLoopState.nonLocalJumps |= 2 /* Break */;
+                            labelMarker = "break";
+                        }
+                        else {
+                            convertedLoopState.nonLocalJumps |= 4 /* Continue */;
+                            // note: return value is emitted only to simplify debugging, call to converted loop body does not do any dispatching on it.
+                            labelMarker = "continue";
+                        }
+                    }
+                    else {
+                        if (node.kind === 224 /* BreakStatement */) {
+                            labelMarker = "break-" + label.escapedText;
+                            setLabeledJump(convertedLoopState, /*isBreak*/ true, ts.idText(label), labelMarker);
+                        }
+                        else {
+                            labelMarker = "continue-" + label.escapedText;
+                            setLabeledJump(convertedLoopState, /*isBreak*/ false, ts.idText(label), labelMarker);
+                        }
+                    }
+                    var returnExpression = ts.createLiteral(labelMarker);
+                    if (convertedLoopState.loopOutParameters.length) {
+                        var outParams = convertedLoopState.loopOutParameters;
+                        var expr = void 0;
+                        for (var i = 0; i < outParams.length; i++) {
+                            var copyExpr = copyOutParameter(outParams[i], 1 /* ToOutParameter */);
+                            if (i === 0) {
+                                expr = copyExpr;
+                            }
+                            else {
+                                expr = ts.createBinary(expr, 26 /* CommaToken */, copyExpr);
+                            }
+                        }
+                        returnExpression = ts.createBinary(expr, 26 /* CommaToken */, returnExpression);
+                    }
+                    return ts.createReturn(returnExpression);
+                }
+            }
+            return ts.visitEachChild(node, visitor, context);
+        }
+        /**
+         * Visits a ClassDeclaration and transforms it into a variable statement.
+         *
+         * @param node A ClassDeclaration node.
+         */
+        function visitClassDeclaration(node) {
+            // [source]
+            //      class C { }
+            //
+            // [output]
+            //      var C = (function () {
+            //          function C() {
+            //          }
+            //          return C;
+            //      }());
+            var variable = ts.createVariableDeclaration(ts.getLocalName(node, /*allowComments*/ true), 
+            /*type*/ undefined, transformClassLikeDeclarationToExpression(node));
+            ts.setOriginalNode(variable, node);
+            var statements = [];
+            var statement = ts.createVariableStatement(/*modifiers*/ undefined, ts.createVariableDeclarationList([variable]));
+            ts.setOriginalNode(statement, node);
+            ts.setTextRange(statement, node);
+            ts.startOnNewLine(statement);
+            statements.push(statement);
+            // Add an `export default` statement for default exports (for `--target es5 --module es6`)
+            if (ts.hasModifier(node, 1 /* Export */)) {
+                var exportStatement = ts.hasModifier(node, 512 /* Default */)
+                    ? ts.createExportDefault(ts.getLocalName(node))
+                    : ts.createExternalModuleExport(ts.getLocalName(node));
+                ts.setOriginalNode(exportStatement, statement);
+                statements.push(exportStatement);
+            }
+            var emitFlags = ts.getEmitFlags(node);
+            if ((emitFlags & 4194304 /* HasEndOfDeclarationMarker */) === 0) {
+                // Add a DeclarationMarker as a marker for the end of the declaration
+                statements.push(ts.createEndOfDeclarationMarker(node));
+                ts.setEmitFlags(statement, emitFlags | 4194304 /* HasEndOfDeclarationMarker */);
+            }
+            return ts.singleOrMany(statements);
+        }
+        /**
+         * Visits a ClassExpression and transforms it into an expression.
+         *
+         * @param node A ClassExpression node.
+         */
+        function visitClassExpression(node) {
+            // [source]
+            //      C = class { }
+            //
+            // [output]
+            //      C = (function () {
+            //          function class_1() {
+            //          }
+            //          return class_1;
+            //      }())
+            return transformClassLikeDeclarationToExpression(node);
+        }
+        /**
+         * Transforms a ClassExpression or ClassDeclaration into an expression.
+         *
+         * @param node A ClassExpression or ClassDeclaration node.
+         */
+        function transformClassLikeDeclarationToExpression(node) {
+            // [source]
+            //      class C extends D {
+            //          constructor() {}
+            //          method() {}
+            //          get prop() {}
+            //          set prop(v) {}
+            //      }
+            //
+            // [output]
+            //      (function (_super) {
+            //          __extends(C, _super);
+            //          function C() {
+            //          }
+            //          C.prototype.method = function () {}
+            //          Object.defineProperty(C.prototype, "prop", {
+            //              get: function() {},
+            //              set: function() {},
+            //              enumerable: true,
+            //              configurable: true
+            //          });
+            //          return C;
+            //      }(D))
+            if (node.name) {
+                enableSubstitutionsForBlockScopedBindings();
+            }
+            var extendsClauseElement = ts.getClassExtendsHeritageClauseElement(node);
+            var classFunction = ts.createFunctionExpression(
+            /*modifiers*/ undefined, 
+            /*asteriskToken*/ undefined, 
+            /*name*/ undefined, 
+            /*typeParameters*/ undefined, extendsClauseElement ? [ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, ts.createFileLevelUniqueName("_super"))] : [], 
+            /*type*/ undefined, transformClassBody(node, extendsClauseElement));
+            // To preserve the behavior of the old emitter, we explicitly indent
+            // the body of the function here if it was requested in an earlier
+            // transformation.
+            ts.setEmitFlags(classFunction, (ts.getEmitFlags(node) & 65536 /* Indented */) | 524288 /* ReuseTempVariableScope */);
+            // "inner" and "outer" below are added purely to preserve source map locations from
+            // the old emitter
+            var inner = ts.createPartiallyEmittedExpression(classFunction);
+            inner.end = node.end;
+            ts.setEmitFlags(inner, 1536 /* NoComments */);
+            var outer = ts.createPartiallyEmittedExpression(inner);
+            outer.end = ts.skipTrivia(currentText, node.pos);
+            ts.setEmitFlags(outer, 1536 /* NoComments */);
+            var result = ts.createParen(ts.createCall(outer, 
+            /*typeArguments*/ undefined, extendsClauseElement
+                ? [ts.visitNode(extendsClauseElement.expression, visitor, ts.isExpression)]
+                : []));
+            ts.addSyntheticLeadingComment(result, 3 /* MultiLineCommentTrivia */, "* @class ");
+            return result;
+        }
+        /**
+         * Transforms a ClassExpression or ClassDeclaration into a function body.
+         *
+         * @param node A ClassExpression or ClassDeclaration node.
+         * @param extendsClauseElement The expression for the class `extends` clause.
+         */
+        function transformClassBody(node, extendsClauseElement) {
+            var statements = [];
+            startLexicalEnvironment();
+            addExtendsHelperIfNeeded(statements, node, extendsClauseElement);
+            addConstructor(statements, node, extendsClauseElement);
+            addClassMembers(statements, node);
+            // Create a synthetic text range for the return statement.
+            var closingBraceLocation = ts.createTokenRange(ts.skipTrivia(currentText, node.members.end), 18 /* CloseBraceToken */);
+            var localName = ts.getInternalName(node);
+            // The following partially-emitted expression exists purely to align our sourcemap
+            // emit with the original emitter.
+            var outer = ts.createPartiallyEmittedExpression(localName);
+            outer.end = closingBraceLocation.end;
+            ts.setEmitFlags(outer, 1536 /* NoComments */);
+            var statement = ts.createReturn(outer);
+            statement.pos = closingBraceLocation.pos;
+            ts.setEmitFlags(statement, 1536 /* NoComments */ | 384 /* NoTokenSourceMaps */);
+            statements.push(statement);
+            ts.prependStatements(statements, endLexicalEnvironment());
+            var block = ts.createBlock(ts.setTextRange(ts.createNodeArray(statements), /*location*/ node.members), /*multiLine*/ true);
+            ts.setEmitFlags(block, 1536 /* NoComments */);
+            return block;
+        }
+        /**
+         * Adds a call to the `__extends` helper if needed for a class.
+         *
+         * @param statements The statements of the class body function.
+         * @param node The ClassExpression or ClassDeclaration node.
+         * @param extendsClauseElement The expression for the class `extends` clause.
+         */
+        function addExtendsHelperIfNeeded(statements, node, extendsClauseElement) {
+            if (extendsClauseElement) {
+                statements.push(ts.setTextRange(ts.createStatement(createExtendsHelper(context, ts.getInternalName(node))), 
+                /*location*/ extendsClauseElement));
+            }
+        }
+        /**
+         * Adds the constructor of the class to a class body function.
+         *
+         * @param statements The statements of the class body function.
+         * @param node The ClassExpression or ClassDeclaration node.
+         * @param extendsClauseElement The expression for the class `extends` clause.
+         */
+        function addConstructor(statements, node, extendsClauseElement) {
+            var savedConvertedLoopState = convertedLoopState;
+            convertedLoopState = undefined;
+            var ancestorFacts = enterSubtree(16278 /* ConstructorExcludes */, 73 /* ConstructorIncludes */);
+            var constructor = ts.getFirstConstructorWithBody(node);
+            var hasSynthesizedSuper = hasSynthesizedDefaultSuperCall(constructor, extendsClauseElement !== undefined);
+            var constructorFunction = ts.createFunctionDeclaration(
+            /*decorators*/ undefined, 
+            /*modifiers*/ undefined, 
+            /*asteriskToken*/ undefined, ts.getInternalName(node), 
+            /*typeParameters*/ undefined, transformConstructorParameters(constructor, hasSynthesizedSuper), 
+            /*type*/ undefined, transformConstructorBody(constructor, node, extendsClauseElement, hasSynthesizedSuper));
+            ts.setTextRange(constructorFunction, constructor || node);
+            if (extendsClauseElement) {
+                ts.setEmitFlags(constructorFunction, 8 /* CapturesThis */);
+            }
+            statements.push(constructorFunction);
+            exitSubtree(ancestorFacts, 49152 /* PropagateNewTargetMask */, 0 /* None */);
+            convertedLoopState = savedConvertedLoopState;
+        }
+        /**
+         * Transforms the parameters of the constructor declaration of a class.
+         *
+         * @param constructor The constructor for the class.
+         * @param hasSynthesizedSuper A value indicating whether the constructor starts with a
+         *                            synthesized `super` call.
+         */
+        function transformConstructorParameters(constructor, hasSynthesizedSuper) {
+            // If the TypeScript transformer needed to synthesize a constructor for property
+            // initializers, it would have also added a synthetic `...args` parameter and
+            // `super` call.
+            // If this is the case, we do not include the synthetic `...args` parameter and
+            // will instead use the `arguments` object in ES5/3.
+            return ts.visitParameterList(constructor && !hasSynthesizedSuper ? constructor.parameters : undefined, visitor, context)
+                || [];
+        }
+        /**
+         * Transforms the body of a constructor declaration of a class.
+         *
+         * @param constructor The constructor for the class.
+         * @param node The node which contains the constructor.
+         * @param extendsClauseElement The expression for the class `extends` clause.
+         * @param hasSynthesizedSuper A value indicating whether the constructor starts with a
+         *                            synthesized `super` call.
+         */
+        function transformConstructorBody(constructor, node, extendsClauseElement, hasSynthesizedSuper) {
+            var statements = [];
+            resumeLexicalEnvironment();
+            var statementOffset = -1;
+            if (hasSynthesizedSuper) {
+                // If a super call has already been synthesized,
+                // we're going to assume that we should just transform everything after that.
+                // The assumption is that no prior step in the pipeline has added any prologue directives.
+                statementOffset = 0;
+            }
+            else if (constructor) {
+                statementOffset = ts.addStandardPrologue(statements, constructor.body.statements, /*ensureUseStrict*/ false);
+            }
+            if (constructor) {
+                addDefaultValueAssignmentsIfNeeded(statements, constructor);
+                addRestParameterIfNeeded(statements, constructor, hasSynthesizedSuper);
+                if (!hasSynthesizedSuper) {
+                    // If no super call has been synthesized, emit custom prologue directives.
+                    statementOffset = ts.addCustomPrologue(statements, constructor.body.statements, statementOffset, visitor);
+                }
+                ts.Debug.assert(statementOffset >= 0, "statementOffset not initialized correctly!");
+            }
+            // determine whether the class is known syntactically to be a derived class (e.g. a
+            // class that extends a value that is not syntactically known to be `null`).
+            var isDerivedClass = !!extendsClauseElement && ts.skipOuterExpressions(extendsClauseElement.expression).kind !== 95 /* NullKeyword */;
+            var superCaptureStatus = declareOrCaptureOrReturnThisForConstructorIfNeeded(statements, constructor, isDerivedClass, hasSynthesizedSuper, statementOffset);
+            // The last statement expression was replaced. Skip it.
+            if (superCaptureStatus === 1 /* ReplaceSuperCapture */ || superCaptureStatus === 2 /* ReplaceWithReturn */) {
+                statementOffset++;
+            }
+            if (constructor) {
+                if (superCaptureStatus === 1 /* ReplaceSuperCapture */) {
+                    hierarchyFacts |= 4096 /* ConstructorWithCapturedSuper */;
+                }
+                ts.addRange(statements, ts.visitNodes(constructor.body.statements, visitor, ts.isStatement, /*start*/ statementOffset));
+            }
+            // Return `_this` unless we're sure enough that it would be pointless to add a return statement.
+            // If there's a constructor that we can tell returns in enough places, then we *do not* want to add a return.
+            if (isDerivedClass
+                && superCaptureStatus !== 2 /* ReplaceWithReturn */
+                && !(constructor && isSufficientlyCoveredByReturnStatements(constructor.body))) {
+                statements.push(ts.createReturn(ts.createFileLevelUniqueName("_this")));
+            }
+            ts.prependStatements(statements, endLexicalEnvironment());
+            if (constructor) {
+                prependCaptureNewTargetIfNeeded(statements, constructor, /*copyOnWrite*/ false);
+            }
+            var block = ts.createBlock(ts.setTextRange(ts.createNodeArray(statements), 
+            /*location*/ constructor ? constructor.body.statements : node.members), 
+            /*multiLine*/ true);
+            ts.setTextRange(block, constructor ? constructor.body : node);
+            if (!constructor) {
+                ts.setEmitFlags(block, 1536 /* NoComments */);
+            }
+            return block;
+        }
+        /**
+         * We want to try to avoid emitting a return statement in certain cases if a user already returned something.
+         * It would generate obviously dead code, so we'll try to make things a little bit prettier
+         * by doing a minimal check on whether some common patterns always explicitly return.
+         */
+        function isSufficientlyCoveredByReturnStatements(statement) {
+            // A return statement is considered covered.
+            if (statement.kind === 225 /* ReturnStatement */) {
+                return true;
+            }
+            // An if-statement with two covered branches is covered.
+            else if (statement.kind === 217 /* IfStatement */) {
+                var ifStatement = statement;
+                if (ifStatement.elseStatement) {
+                    return isSufficientlyCoveredByReturnStatements(ifStatement.thenStatement) &&
+                        isSufficientlyCoveredByReturnStatements(ifStatement.elseStatement);
+                }
+            }
+            // A block is covered if it has a last statement which is covered.
+            else if (statement.kind === 213 /* Block */) {
+                var lastStatement = ts.lastOrUndefined(statement.statements);
+                if (lastStatement && isSufficientlyCoveredByReturnStatements(lastStatement)) {
+                    return true;
+                }
+            }
+            return false;
+        }
+        /**
+         * Declares a `_this` variable for derived classes and for when arrow functions capture `this`.
+         *
+         * @returns The new statement offset into the `statements` array.
+         */
+        function declareOrCaptureOrReturnThisForConstructorIfNeeded(statements, ctor, isDerivedClass, hasSynthesizedSuper, statementOffset) {
+            // If this isn't a derived class, just capture 'this' for arrow functions if necessary.
+            if (!isDerivedClass) {
+                if (ctor) {
+                    addCaptureThisForNodeIfNeeded(statements, ctor);
+                }
+                return 0 /* NoReplacement */;
+            }
+            // We must be here because the user didn't write a constructor
+            // but we needed to call 'super(...args)' anyway as per 14.5.14 of the ES2016 spec.
+            // If that's the case we can just immediately return the result of a 'super()' call.
+            if (!ctor) {
+                statements.push(ts.createReturn(createDefaultSuperCallOrThis()));
+                return 2 /* ReplaceWithReturn */;
+            }
+            // The constructor exists, but it and the 'super()' call it contains were generated
+            // for something like property initializers.
+            // Create a captured '_this' variable and assume it will subsequently be used.
+            if (hasSynthesizedSuper) {
+                captureThisForNode(statements, ctor, createDefaultSuperCallOrThis());
+                enableSubstitutionsForCapturedThis();
+                return 1 /* ReplaceSuperCapture */;
+            }
+            // Most of the time, a 'super' call will be the first real statement in a constructor body.
+            // In these cases, we'd like to transform these into a *single* statement instead of a declaration
+            // followed by an assignment statement for '_this'. For instance, if we emitted without an initializer,
+            // we'd get:
+            //
+            //      var _this;
+            //      _this = _super.call(...) || this;
+            //
+            // instead of
+            //
+            //      var _this = _super.call(...) || this;
+            //
+            // Additionally, if the 'super()' call is the last statement, we should just avoid capturing
+            // entirely and immediately return the result like so:
+            //
+            //      return _super.call(...) || this;
+            //
+            var firstStatement;
+            var superCallExpression;
+            var ctorStatements = ctor.body.statements;
+            if (statementOffset < ctorStatements.length) {
+                firstStatement = ctorStatements[statementOffset];
+                if (firstStatement.kind === 216 /* ExpressionStatement */ && ts.isSuperCall(firstStatement.expression)) {
+                    superCallExpression = visitImmediateSuperCallInBody(firstStatement.expression);
+                }
+            }
+            // Return the result if we have an immediate super() call on the last statement,
+            // but only if the constructor itself doesn't use 'this' elsewhere.
+            if (superCallExpression
+                && statementOffset === ctorStatements.length - 1
+                && !(ctor.transformFlags & (16384 /* ContainsLexicalThis */ | 32768 /* ContainsCapturedLexicalThis */))) {
+                var returnStatement = ts.createReturn(superCallExpression);
+                if (superCallExpression.kind !== 200 /* BinaryExpression */
+                    || superCallExpression.left.kind !== 187 /* CallExpression */) {
+                    ts.Debug.fail("Assumed generated super call would have form 'super.call(...) || this'.");
+                }
+                // Shift comments from the original super call to the return statement.
+                ts.setCommentRange(returnStatement, ts.getCommentRange(ts.setEmitFlags(superCallExpression.left, 1536 /* NoComments */)));
+                statements.push(returnStatement);
+                return 2 /* ReplaceWithReturn */;
+            }
+            // Perform the capture.
+            captureThisForNode(statements, ctor, superCallExpression || createActualThis(), firstStatement);
+            // If we're actually replacing the original statement, we need to signal this to the caller.
+            if (superCallExpression) {
+                return 1 /* ReplaceSuperCapture */;
+            }
+            return 0 /* NoReplacement */;
+        }
+        function createActualThis() {
+            return ts.setEmitFlags(ts.createThis(), 4 /* NoSubstitution */);
+        }
+        function createDefaultSuperCallOrThis() {
+            return ts.createLogicalOr(ts.createLogicalAnd(ts.createStrictInequality(ts.createFileLevelUniqueName("_super"), ts.createNull()), ts.createFunctionApply(ts.createFileLevelUniqueName("_super"), createActualThis(), ts.createIdentifier("arguments"))), createActualThis());
+        }
+        /**
+         * Visits a parameter declaration.
+         *
+         * @param node A ParameterDeclaration node.
+         */
+        function visitParameter(node) {
+            if (node.dotDotDotToken) {
+                // rest parameters are elided
+                return undefined;
+            }
+            else if (ts.isBindingPattern(node.name)) {
+                // Binding patterns are converted into a generated name and are
+                // evaluated inside the function body.
+                return ts.setOriginalNode(ts.setTextRange(ts.createParameter(
+                /*decorators*/ undefined, 
+                /*modifiers*/ undefined, 
+                /*dotDotDotToken*/ undefined, ts.getGeneratedNameForNode(node), 
+                /*questionToken*/ undefined, 
+                /*type*/ undefined, 
+                /*initializer*/ undefined), 
+                /*location*/ node), 
+                /*original*/ node);
+            }
+            else if (node.initializer) {
+                // Initializers are elided
+                return ts.setOriginalNode(ts.setTextRange(ts.createParameter(
+                /*decorators*/ undefined, 
+                /*modifiers*/ undefined, 
+                /*dotDotDotToken*/ undefined, node.name, 
+                /*questionToken*/ undefined, 
+                /*type*/ undefined, 
+                /*initializer*/ undefined), 
+                /*location*/ node), 
+                /*original*/ node);
+            }
+            else {
+                return node;
+            }
+        }
+        /**
+         * Gets a value indicating whether we need to add default value assignments for a
+         * function-like node.
+         *
+         * @param node A function-like node.
+         */
+        function shouldAddDefaultValueAssignments(node) {
+            return (node.transformFlags & 131072 /* ContainsDefaultValueAssignments */) !== 0;
+        }
+        /**
+         * Adds statements to the body of a function-like node if it contains parameters with
+         * binding patterns or initializers.
+         *
+         * @param statements The statements for the new function body.
+         * @param node A function-like node.
+         */
+        function addDefaultValueAssignmentsIfNeeded(statements, node) {
+            if (!shouldAddDefaultValueAssignments(node)) {
+                return;
+            }
+            for (var _i = 0, _a = node.parameters; _i < _a.length; _i++) {
+                var parameter = _a[_i];
+                var name = parameter.name, initializer = parameter.initializer, dotDotDotToken = parameter.dotDotDotToken;
+                // A rest parameter cannot have a binding pattern or an initializer,
+                // so let's just ignore it.
+                if (dotDotDotToken) {
+                    continue;
+                }
+                if (ts.isBindingPattern(name)) {
+                    addDefaultValueAssignmentForBindingPattern(statements, parameter, name, initializer);
+                }
+                else if (initializer) {
+                    addDefaultValueAssignmentForInitializer(statements, parameter, name, initializer);
+                }
+            }
+        }
+        /**
+         * Adds statements to the body of a function-like node for parameters with binding patterns
+         *
+         * @param statements The statements for the new function body.
+         * @param parameter The parameter for the function.
+         * @param name The name of the parameter.
+         * @param initializer The initializer for the parameter.
+         */
+        function addDefaultValueAssignmentForBindingPattern(statements, parameter, name, initializer) {
+            var temp = ts.getGeneratedNameForNode(parameter);
+            // In cases where a binding pattern is simply '[]' or '{}',
+            // we usually don't want to emit a var declaration; however, in the presence
+            // of an initializer, we must emit that expression to preserve side effects.
+            if (name.elements.length > 0) {
+                statements.push(ts.setEmitFlags(ts.createVariableStatement(
+                /*modifiers*/ undefined, ts.createVariableDeclarationList(ts.flattenDestructuringBinding(parameter, visitor, context, 0 /* All */, temp))), 1048576 /* CustomPrologue */));
+            }
+            else if (initializer) {
+                statements.push(ts.setEmitFlags(ts.createStatement(ts.createAssignment(temp, ts.visitNode(initializer, visitor, ts.isExpression))), 1048576 /* CustomPrologue */));
+            }
+        }
+        /**
+         * Adds statements to the body of a function-like node for parameters with initializers.
+         *
+         * @param statements The statements for the new function body.
+         * @param parameter The parameter for the function.
+         * @param name The name of the parameter.
+         * @param initializer The initializer for the parameter.
+         */
+        function addDefaultValueAssignmentForInitializer(statements, parameter, name, initializer) {
+            initializer = ts.visitNode(initializer, visitor, ts.isExpression);
+            var statement = ts.createIf(ts.createTypeCheck(ts.getSynthesizedClone(name), "undefined"), ts.setEmitFlags(ts.setTextRange(ts.createBlock([
+                ts.createStatement(ts.setEmitFlags(ts.setTextRange(ts.createAssignment(ts.setEmitFlags(ts.getMutableClone(name), 48 /* NoSourceMap */), ts.setEmitFlags(initializer, 48 /* NoSourceMap */ | ts.getEmitFlags(initializer) | 1536 /* NoComments */)), parameter), 1536 /* NoComments */))
+            ]), parameter), 1 /* SingleLine */ | 32 /* NoTrailingSourceMap */ | 384 /* NoTokenSourceMaps */ | 1536 /* NoComments */));
+            ts.startOnNewLine(statement);
+            ts.setTextRange(statement, parameter);
+            ts.setEmitFlags(statement, 384 /* NoTokenSourceMaps */ | 32 /* NoTrailingSourceMap */ | 1048576 /* CustomPrologue */ | 1536 /* NoComments */);
+            statements.push(statement);
+        }
+        /**
+         * Gets a value indicating whether we need to add statements to handle a rest parameter.
+         *
+         * @param node A ParameterDeclaration node.
+         * @param inConstructorWithSynthesizedSuper A value indicating whether the parameter is
+         *                                          part of a constructor declaration with a
+         *                                          synthesized call to `super`
+         */
+        function shouldAddRestParameter(node, inConstructorWithSynthesizedSuper) {
+            return node && node.dotDotDotToken && node.name.kind === 71 /* Identifier */ && !inConstructorWithSynthesizedSuper;
+        }
+        /**
+         * Adds statements to the body of a function-like node if it contains a rest parameter.
+         *
+         * @param statements The statements for the new function body.
+         * @param node A function-like node.
+         * @param inConstructorWithSynthesizedSuper A value indicating whether the parameter is
+         *                                          part of a constructor declaration with a
+         *                                          synthesized call to `super`
+         */
+        function addRestParameterIfNeeded(statements, node, inConstructorWithSynthesizedSuper) {
+            var parameter = ts.lastOrUndefined(node.parameters);
+            if (!shouldAddRestParameter(parameter, inConstructorWithSynthesizedSuper)) {
+                return;
+            }
+            // `declarationName` is the name of the local declaration for the parameter.
+            var declarationName = ts.getMutableClone(parameter.name);
+            ts.setEmitFlags(declarationName, 48 /* NoSourceMap */);
+            // `expressionName` is the name of the parameter used in expressions.
+            var expressionName = ts.getSynthesizedClone(parameter.name);
+            var restIndex = node.parameters.length - 1;
+            var temp = ts.createLoopVariable();
+            // var param = [];
+            statements.push(ts.setEmitFlags(ts.setTextRange(ts.createVariableStatement(
+            /*modifiers*/ undefined, ts.createVariableDeclarationList([
+                ts.createVariableDeclaration(declarationName, 
+                /*type*/ undefined, ts.createArrayLiteral([]))
+            ])), 
+            /*location*/ parameter), 1048576 /* CustomPrologue */));
+            // for (var _i = restIndex; _i < arguments.length; _i++) {
+            //   param[_i - restIndex] = arguments[_i];
+            // }
+            var forStatement = ts.createFor(ts.setTextRange(ts.createVariableDeclarationList([
+                ts.createVariableDeclaration(temp, /*type*/ undefined, ts.createLiteral(restIndex))
+            ]), parameter), ts.setTextRange(ts.createLessThan(temp, ts.createPropertyAccess(ts.createIdentifier("arguments"), "length")), parameter), ts.setTextRange(ts.createPostfixIncrement(temp), parameter), ts.createBlock([
+                ts.startOnNewLine(ts.setTextRange(ts.createStatement(ts.createAssignment(ts.createElementAccess(expressionName, restIndex === 0
+                    ? temp
+                    : ts.createSubtract(temp, ts.createLiteral(restIndex))), ts.createElementAccess(ts.createIdentifier("arguments"), temp))), 
+                /*location*/ parameter))
+            ]));
+            ts.setEmitFlags(forStatement, 1048576 /* CustomPrologue */);
+            ts.startOnNewLine(forStatement);
+            statements.push(forStatement);
+        }
+        /**
+         * Adds a statement to capture the `this` of a function declaration if it is needed.
+         *
+         * @param statements The statements for the new function body.
+         * @param node A node.
+         */
+        function addCaptureThisForNodeIfNeeded(statements, node) {
+            if (node.transformFlags & 32768 /* ContainsCapturedLexicalThis */ && node.kind !== 193 /* ArrowFunction */) {
+                captureThisForNode(statements, node, ts.createThis());
+            }
+        }
+        function captureThisForNode(statements, node, initializer, originalStatement) {
+            enableSubstitutionsForCapturedThis();
+            var captureThisStatement = ts.createVariableStatement(
+            /*modifiers*/ undefined, ts.createVariableDeclarationList([
+                ts.createVariableDeclaration(ts.createFileLevelUniqueName("_this"), 
+                /*type*/ undefined, initializer)
+            ]));
+            ts.setEmitFlags(captureThisStatement, 1536 /* NoComments */ | 1048576 /* CustomPrologue */);
+            ts.setTextRange(captureThisStatement, originalStatement);
+            ts.setSourceMapRange(captureThisStatement, node);
+            statements.push(captureThisStatement);
+        }
+        function prependCaptureNewTargetIfNeeded(statements, node, copyOnWrite) {
+            if (hierarchyFacts & 16384 /* NewTarget */) {
+                var newTarget = void 0;
+                switch (node.kind) {
+                    case 193 /* ArrowFunction */:
+                        return statements;
+                    case 154 /* MethodDeclaration */:
+                    case 156 /* GetAccessor */:
+                    case 157 /* SetAccessor */:
+                        // Methods and accessors cannot be constructors, so 'new.target' will
+                        // always return 'undefined'.
+                        newTarget = ts.createVoidZero();
+                        break;
+                    case 155 /* Constructor */:
+                        // Class constructors can only be called with `new`, so `this.constructor`
+                        // should be relatively safe to use.
+                        newTarget = ts.createPropertyAccess(ts.setEmitFlags(ts.createThis(), 4 /* NoSubstitution */), "constructor");
+                        break;
+                    case 234 /* FunctionDeclaration */:
+                    case 192 /* FunctionExpression */:
+                        // Functions can be called or constructed, and may have a `this` due to
+                        // being a member or when calling an imported function via `other_1.f()`.
+                        newTarget = ts.createConditional(ts.createLogicalAnd(ts.setEmitFlags(ts.createThis(), 4 /* NoSubstitution */), ts.createBinary(ts.setEmitFlags(ts.createThis(), 4 /* NoSubstitution */), 93 /* InstanceOfKeyword */, ts.getLocalName(node))), ts.createPropertyAccess(ts.setEmitFlags(ts.createThis(), 4 /* NoSubstitution */), "constructor"), ts.createVoidZero());
+                        break;
+                    default:
+                        return ts.Debug.failBadSyntaxKind(node);
+                }
+                var captureNewTargetStatement = ts.createVariableStatement(
+                /*modifiers*/ undefined, ts.createVariableDeclarationList([
+                    ts.createVariableDeclaration(ts.createFileLevelUniqueName("_newTarget"), 
+                    /*type*/ undefined, newTarget)
+                ]));
+                if (copyOnWrite) {
+                    return [captureNewTargetStatement].concat(statements);
+                }
+                statements.unshift(captureNewTargetStatement);
+            }
+            return statements;
+        }
+        /**
+         * Adds statements to the class body function for a class to define the members of the
+         * class.
+         *
+         * @param statements The statements for the class body function.
+         * @param node The ClassExpression or ClassDeclaration node.
+         */
+        function addClassMembers(statements, node) {
+            for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
+                var member = _a[_i];
+                switch (member.kind) {
+                    case 212 /* SemicolonClassElement */:
+                        statements.push(transformSemicolonClassElementToStatement(member));
+                        break;
+                    case 154 /* MethodDeclaration */:
+                        statements.push(transformClassMethodDeclarationToStatement(getClassMemberPrefix(node, member), member, node));
+                        break;
+                    case 156 /* GetAccessor */:
+                    case 157 /* SetAccessor */:
+                        var accessors = ts.getAllAccessorDeclarations(node.members, member);
+                        if (member === accessors.firstAccessor) {
+                            statements.push(transformAccessorsToStatement(getClassMemberPrefix(node, member), accessors, node));
+                        }
+                        break;
+                    case 155 /* Constructor */:
+                        // Constructors are handled in visitClassExpression/visitClassDeclaration
+                        break;
+                    default:
+                        ts.Debug.failBadSyntaxKind(node);
+                        break;
+                }
+            }
+        }
+        /**
+         * Transforms a SemicolonClassElement into a statement for a class body function.
+         *
+         * @param member The SemicolonClassElement node.
+         */
+        function transformSemicolonClassElementToStatement(member) {
+            return ts.setTextRange(ts.createEmptyStatement(), member);
+        }
+        /**
+         * Transforms a MethodDeclaration into a statement for a class body function.
+         *
+         * @param receiver The receiver for the member.
+         * @param member The MethodDeclaration node.
+         */
+        function transformClassMethodDeclarationToStatement(receiver, member, container) {
+            var ancestorFacts = enterSubtree(0 /* None */, 0 /* None */);
+            var commentRange = ts.getCommentRange(member);
+            var sourceMapRange = ts.getSourceMapRange(member);
+            var memberName = ts.createMemberAccessForPropertyName(receiver, ts.visitNode(member.name, visitor, ts.isPropertyName), /*location*/ member.name);
+            var memberFunction = transformFunctionLikeToExpression(member, /*location*/ member, /*name*/ undefined, container);
+            ts.setEmitFlags(memberFunction, 1536 /* NoComments */);
+            ts.setSourceMapRange(memberFunction, sourceMapRange);
+            var statement = ts.setTextRange(ts.createStatement(ts.createAssignment(memberName, memberFunction)), 
+            /*location*/ member);
+            ts.setOriginalNode(statement, member);
+            ts.setCommentRange(statement, commentRange);
+            // The location for the statement is used to emit comments only.
+            // No source map should be emitted for this statement to align with the
+            // old emitter.
+            ts.setEmitFlags(statement, 48 /* NoSourceMap */);
+            exitSubtree(ancestorFacts, 49152 /* PropagateNewTargetMask */, hierarchyFacts & 49152 /* PropagateNewTargetMask */ ? 16384 /* NewTarget */ : 0 /* None */);
+            return statement;
+        }
+        /**
+         * Transforms a set of related of get/set accessors into a statement for a class body function.
+         *
+         * @param receiver The receiver for the member.
+         * @param accessors The set of related get/set accessors.
+         */
+        function transformAccessorsToStatement(receiver, accessors, container) {
+            var statement = ts.createStatement(transformAccessorsToExpression(receiver, accessors, container, /*startsOnNewLine*/ false));
+            // The location for the statement is used to emit source maps only.
+            // No comments should be emitted for this statement to align with the
+            // old emitter.
+            ts.setEmitFlags(statement, 1536 /* NoComments */);
+            ts.setSourceMapRange(statement, ts.getSourceMapRange(accessors.firstAccessor));
+            return statement;
+        }
+        /**
+         * Transforms a set of related get/set accessors into an expression for either a class
+         * body function or an ObjectLiteralExpression with computed properties.
+         *
+         * @param receiver The receiver for the member.
+         */
+        function transformAccessorsToExpression(receiver, _a, container, startsOnNewLine) {
+            var firstAccessor = _a.firstAccessor, getAccessor = _a.getAccessor, setAccessor = _a.setAccessor;
+            var ancestorFacts = enterSubtree(0 /* None */, 0 /* None */);
+            // To align with source maps in the old emitter, the receiver and property name
+            // arguments are both mapped contiguously to the accessor name.
+            var target = ts.getMutableClone(receiver);
+            ts.setEmitFlags(target, 1536 /* NoComments */ | 32 /* NoTrailingSourceMap */);
+            ts.setSourceMapRange(target, firstAccessor.name); // TODO: GH#18217
+            var propertyName = ts.createExpressionForPropertyName(ts.visitNode(firstAccessor.name, visitor, ts.isPropertyName));
+            ts.setEmitFlags(propertyName, 1536 /* NoComments */ | 16 /* NoLeadingSourceMap */);
+            ts.setSourceMapRange(propertyName, firstAccessor.name);
+            var properties = [];
+            if (getAccessor) {
+                var getterFunction = transformFunctionLikeToExpression(getAccessor, /*location*/ undefined, /*name*/ undefined, container);
+                ts.setSourceMapRange(getterFunction, ts.getSourceMapRange(getAccessor));
+                ts.setEmitFlags(getterFunction, 512 /* NoLeadingComments */);
+                var getter = ts.createPropertyAssignment("get", getterFunction);
+                ts.setCommentRange(getter, ts.getCommentRange(getAccessor));
+                properties.push(getter);
+            }
+            if (setAccessor) {
+                var setterFunction = transformFunctionLikeToExpression(setAccessor, /*location*/ undefined, /*name*/ undefined, container);
+                ts.setSourceMapRange(setterFunction, ts.getSourceMapRange(setAccessor));
+                ts.setEmitFlags(setterFunction, 512 /* NoLeadingComments */);
+                var setter = ts.createPropertyAssignment("set", setterFunction);
+                ts.setCommentRange(setter, ts.getCommentRange(setAccessor));
+                properties.push(setter);
+            }
+            properties.push(ts.createPropertyAssignment("enumerable", ts.createTrue()), ts.createPropertyAssignment("configurable", ts.createTrue()));
+            var call = ts.createCall(ts.createPropertyAccess(ts.createIdentifier("Object"), "defineProperty"), 
+            /*typeArguments*/ undefined, [
+                target,
+                propertyName,
+                ts.createObjectLiteral(properties, /*multiLine*/ true)
+            ]);
+            if (startsOnNewLine) {
+                ts.startOnNewLine(call);
+            }
+            exitSubtree(ancestorFacts, 49152 /* PropagateNewTargetMask */, hierarchyFacts & 49152 /* PropagateNewTargetMask */ ? 16384 /* NewTarget */ : 0 /* None */);
+            return call;
+        }
+        /**
+         * Visits an ArrowFunction and transforms it into a FunctionExpression.
+         *
+         * @param node An ArrowFunction node.
+         */
+        function visitArrowFunction(node) {
+            if (node.transformFlags & 16384 /* ContainsLexicalThis */) {
+                enableSubstitutionsForCapturedThis();
+            }
+            var savedConvertedLoopState = convertedLoopState;
+            convertedLoopState = undefined;
+            var ancestorFacts = enterSubtree(16256 /* ArrowFunctionExcludes */, 66 /* ArrowFunctionIncludes */);
+            var func = ts.createFunctionExpression(
+            /*modifiers*/ undefined, 
+            /*asteriskToken*/ undefined, 
+            /*name*/ undefined, 
+            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
+            /*type*/ undefined, transformFunctionBody(node));
+            ts.setTextRange(func, node);
+            ts.setOriginalNode(func, node);
+            ts.setEmitFlags(func, 8 /* CapturesThis */);
+            exitSubtree(ancestorFacts, 0 /* None */, 0 /* None */);
+            convertedLoopState = savedConvertedLoopState;
+            return func;
+        }
+        /**
+         * Visits a FunctionExpression node.
+         *
+         * @param node a FunctionExpression node.
+         */
+        function visitFunctionExpression(node) {
+            var ancestorFacts = ts.getEmitFlags(node) & 262144 /* AsyncFunctionBody */
+                ? enterSubtree(16278 /* AsyncFunctionBodyExcludes */, 69 /* AsyncFunctionBodyIncludes */)
+                : enterSubtree(16286 /* FunctionExcludes */, 65 /* FunctionIncludes */);
+            var savedConvertedLoopState = convertedLoopState;
+            convertedLoopState = undefined;
+            var parameters = ts.visitParameterList(node.parameters, visitor, context);
+            var body = node.transformFlags & 64 /* ES2015 */
+                ? transformFunctionBody(node)
+                : visitFunctionBodyDownLevel(node);
+            var name = hierarchyFacts & 16384 /* NewTarget */
+                ? ts.getLocalName(node)
+                : node.name;
+            exitSubtree(ancestorFacts, 49152 /* PropagateNewTargetMask */, 0 /* None */);
+            convertedLoopState = savedConvertedLoopState;
+            return ts.updateFunctionExpression(node, 
+            /*modifiers*/ undefined, node.asteriskToken, name, 
+            /*typeParameters*/ undefined, parameters, 
+            /*type*/ undefined, body);
+        }
+        /**
+         * Visits a FunctionDeclaration node.
+         *
+         * @param node a FunctionDeclaration node.
+         */
+        function visitFunctionDeclaration(node) {
+            var savedConvertedLoopState = convertedLoopState;
+            convertedLoopState = undefined;
+            var ancestorFacts = enterSubtree(16286 /* FunctionExcludes */, 65 /* FunctionIncludes */);
+            var parameters = ts.visitParameterList(node.parameters, visitor, context);
+            var body = node.transformFlags & 64 /* ES2015 */
+                ? transformFunctionBody(node)
+                : visitFunctionBodyDownLevel(node);
+            var name = hierarchyFacts & 16384 /* NewTarget */
+                ? ts.getLocalName(node)
+                : node.name;
+            exitSubtree(ancestorFacts, 49152 /* PropagateNewTargetMask */, 0 /* None */);
+            convertedLoopState = savedConvertedLoopState;
+            return ts.updateFunctionDeclaration(node, 
+            /*decorators*/ undefined, ts.visitNodes(node.modifiers, visitor, ts.isModifier), node.asteriskToken, name, 
+            /*typeParameters*/ undefined, parameters, 
+            /*type*/ undefined, body);
+        }
+        /**
+         * Transforms a function-like node into a FunctionExpression.
+         *
+         * @param node The function-like node to transform.
+         * @param location The source-map location for the new FunctionExpression.
+         * @param name The name of the new FunctionExpression.
+         */
+        function transformFunctionLikeToExpression(node, location, name, container) {
+            var savedConvertedLoopState = convertedLoopState;
+            convertedLoopState = undefined;
+            var ancestorFacts = container && ts.isClassLike(container) && !ts.hasModifier(node, 32 /* Static */)
+                ? enterSubtree(16286 /* FunctionExcludes */, 65 /* FunctionIncludes */ | 8 /* NonStaticClassElement */)
+                : enterSubtree(16286 /* FunctionExcludes */, 65 /* FunctionIncludes */);
+            var parameters = ts.visitParameterList(node.parameters, visitor, context);
+            var body = transformFunctionBody(node);
+            if (hierarchyFacts & 16384 /* NewTarget */ && !name && (node.kind === 234 /* FunctionDeclaration */ || node.kind === 192 /* FunctionExpression */)) {
+                name = ts.getGeneratedNameForNode(node);
+            }
+            exitSubtree(ancestorFacts, 49152 /* PropagateNewTargetMask */, 0 /* None */);
+            convertedLoopState = savedConvertedLoopState;
+            return ts.setOriginalNode(ts.setTextRange(ts.createFunctionExpression(
+            /*modifiers*/ undefined, node.asteriskToken, name, 
+            /*typeParameters*/ undefined, parameters, 
+            /*type*/ undefined, body), location), 
+            /*original*/ node);
+        }
+        /**
+         * Transforms the body of a function-like node.
+         *
+         * @param node A function-like node.
+         */
+        function transformFunctionBody(node) {
+            var multiLine = false; // indicates whether the block *must* be emitted as multiple lines
+            var singleLine = false; // indicates whether the block *may* be emitted as a single line
+            var statementsLocation;
+            var closeBraceLocation;
+            var leadingStatements = [];
+            var statements = [];
+            var body = node.body;
+            var statementOffset;
+            resumeLexicalEnvironment();
+            if (ts.isBlock(body)) {
+                // ensureUseStrict is false because no new prologue-directive should be added.
+                // addStandardPrologue will put already-existing directives at the beginning of the target statement-array
+                statementOffset = ts.addStandardPrologue(leadingStatements, body.statements, /*ensureUseStrict*/ false);
+            }
+            addCaptureThisForNodeIfNeeded(leadingStatements, node);
+            addDefaultValueAssignmentsIfNeeded(leadingStatements, node);
+            addRestParameterIfNeeded(leadingStatements, node, /*inConstructorWithSynthesizedSuper*/ false);
+            if (ts.isBlock(body)) {
+                // addCustomPrologue puts already-existing directives at the beginning of the target statement-array
+                statementOffset = ts.addCustomPrologue(leadingStatements, body.statements, statementOffset, visitor);
+                statementsLocation = body.statements;
+                ts.addRange(statements, ts.visitNodes(body.statements, visitor, ts.isStatement, statementOffset));
+                // If the original body was a multi-line block, this must be a multi-line block.
+                if (!multiLine && body.multiLine) {
+                    multiLine = true;
+                }
+            }
+            else {
+                ts.Debug.assert(node.kind === 193 /* ArrowFunction */);
+                // To align with the old emitter, we use a synthetic end position on the location
+                // for the statement list we synthesize when we down-level an arrow function with
+                // an expression function body. This prevents both comments and source maps from
+                // being emitted for the end position only.
+                statementsLocation = ts.moveRangeEnd(body, -1);
+                var equalsGreaterThanToken = node.equalsGreaterThanToken;
+                if (!ts.nodeIsSynthesized(equalsGreaterThanToken) && !ts.nodeIsSynthesized(body)) {
+                    if (ts.rangeEndIsOnSameLineAsRangeStart(equalsGreaterThanToken, body, currentSourceFile)) {
+                        singleLine = true;
+                    }
+                    else {
+                        multiLine = true;
+                    }
+                }
+                var expression = ts.visitNode(body, visitor, ts.isExpression);
+                var returnStatement = ts.createReturn(expression);
+                ts.setTextRange(returnStatement, body);
+                ts.moveSyntheticComments(returnStatement, body);
+                ts.setEmitFlags(returnStatement, 384 /* NoTokenSourceMaps */ | 32 /* NoTrailingSourceMap */ | 1024 /* NoTrailingComments */);
+                statements.push(returnStatement);
+                // To align with the source map emit for the old emitter, we set a custom
+                // source map location for the close brace.
+                closeBraceLocation = body;
+            }
+            var lexicalEnvironment = context.endLexicalEnvironment();
+            ts.prependStatements(statements, lexicalEnvironment);
+            prependCaptureNewTargetIfNeeded(statements, node, /*copyOnWrite*/ false);
+            // If we added any final generated statements, this must be a multi-line block
+            if (ts.some(leadingStatements) || ts.some(lexicalEnvironment)) {
+                multiLine = true;
+            }
+            var block = ts.createBlock(ts.setTextRange(ts.createNodeArray(leadingStatements.concat(statements)), statementsLocation), multiLine);
+            ts.setTextRange(block, node.body);
+            if (!multiLine && singleLine) {
+                ts.setEmitFlags(block, 1 /* SingleLine */);
+            }
+            if (closeBraceLocation) {
+                ts.setTokenSourceMapRange(block, 18 /* CloseBraceToken */, closeBraceLocation);
+            }
+            ts.setOriginalNode(block, node.body);
+            return block;
+        }
+        function visitFunctionBodyDownLevel(node) {
+            var updated = ts.visitFunctionBody(node.body, functionBodyVisitor, context);
+            return ts.updateBlock(updated, ts.setTextRange(ts.createNodeArray(prependCaptureNewTargetIfNeeded(updated.statements, node, /*copyOnWrite*/ true)), 
+            /*location*/ updated.statements));
+        }
+        function visitBlock(node, isFunctionBody) {
+            if (isFunctionBody) {
+                // A function body is not a block scope.
+                return ts.visitEachChild(node, visitor, context);
+            }
+            var ancestorFacts = hierarchyFacts & 256 /* IterationStatement */
+                ? enterSubtree(4032 /* IterationStatementBlockExcludes */, 512 /* IterationStatementBlockIncludes */)
+                : enterSubtree(3904 /* BlockExcludes */, 128 /* BlockIncludes */);
+            var updated = ts.visitEachChild(node, visitor, context);
+            exitSubtree(ancestorFacts, 0 /* None */, 0 /* None */);
+            return updated;
+        }
+        /**
+         * Visits an ExpressionStatement that contains a destructuring assignment.
+         *
+         * @param node An ExpressionStatement node.
+         */
+        function visitExpressionStatement(node) {
+            // If we are here it is most likely because our expression is a destructuring assignment.
+            switch (node.expression.kind) {
+                case 191 /* ParenthesizedExpression */:
+                    return ts.updateStatement(node, visitParenthesizedExpression(node.expression, /*needsDestructuringValue*/ false));
+                case 200 /* BinaryExpression */:
+                    return ts.updateStatement(node, visitBinaryExpression(node.expression, /*needsDestructuringValue*/ false));
+            }
+            return ts.visitEachChild(node, visitor, context);
+        }
+        /**
+         * Visits a ParenthesizedExpression that may contain a destructuring assignment.
+         *
+         * @param node A ParenthesizedExpression node.
+         * @param needsDestructuringValue A value indicating whether we need to hold onto the rhs
+         *                                of a destructuring assignment.
+         */
+        function visitParenthesizedExpression(node, needsDestructuringValue) {
+            // If we are here it is most likely because our expression is a destructuring assignment.
+            if (!needsDestructuringValue) {
+                // By default we always emit the RHS at the end of a flattened destructuring
+                // expression. If we are in a state where we do not need the destructuring value,
+                // we pass that information along to the children that care about it.
+                switch (node.expression.kind) {
+                    case 191 /* ParenthesizedExpression */:
+                        return ts.updateParen(node, visitParenthesizedExpression(node.expression, /*needsDestructuringValue*/ false));
+                    case 200 /* BinaryExpression */:
+                        return ts.updateParen(node, visitBinaryExpression(node.expression, /*needsDestructuringValue*/ false));
+                }
+            }
+            return ts.visitEachChild(node, visitor, context);
+        }
+        /**
+         * Visits a BinaryExpression that contains a destructuring assignment.
+         *
+         * @param node A BinaryExpression node.
+         * @param needsDestructuringValue A value indicating whether we need to hold onto the rhs
+         *                                of a destructuring assignment.
+         */
+        function visitBinaryExpression(node, needsDestructuringValue) {
+            // If we are here it is because this is a destructuring assignment.
+            if (ts.isDestructuringAssignment(node)) {
+                return ts.flattenDestructuringAssignment(node, visitor, context, 0 /* All */, needsDestructuringValue);
+            }
+            return ts.visitEachChild(node, visitor, context);
+        }
+        function visitVariableStatement(node) {
+            var ancestorFacts = enterSubtree(0 /* None */, ts.hasModifier(node, 1 /* Export */) ? 32 /* ExportedVariableStatement */ : 0 /* None */);
+            var updated;
+            if (convertedLoopState && (node.declarationList.flags & 3 /* BlockScoped */) === 0) {
+                // we are inside a converted loop - hoist variable declarations
+                var assignments = void 0;
+                for (var _i = 0, _a = node.declarationList.declarations; _i < _a.length; _i++) {
+                    var decl = _a[_i];
+                    hoistVariableDeclarationDeclaredInConvertedLoop(convertedLoopState, decl);
+                    if (decl.initializer) {
+                        var assignment = void 0;
+                        if (ts.isBindingPattern(decl.name)) {
+                            assignment = ts.flattenDestructuringAssignment(decl, visitor, context, 0 /* All */);
+                        }
+                        else {
+                            assignment = ts.createBinary(decl.name, 58 /* EqualsToken */, ts.visitNode(decl.initializer, visitor, ts.isExpression));
+                            ts.setTextRange(assignment, decl);
+                        }
+                        assignments = ts.append(assignments, assignment);
+                    }
+                }
+                if (assignments) {
+                    updated = ts.setTextRange(ts.createStatement(ts.inlineExpressions(assignments)), node);
+                }
+                else {
+                    // none of declarations has initializer - the entire variable statement can be deleted
+                    updated = undefined;
+                }
+            }
+            else {
+                updated = ts.visitEachChild(node, visitor, context);
+            }
+            exitSubtree(ancestorFacts, 0 /* None */, 0 /* None */);
+            return updated;
+        }
+        /**
+         * Visits a VariableDeclarationList that is block scoped (e.g. `let` or `const`).
+         *
+         * @param node A VariableDeclarationList node.
+         */
+        function visitVariableDeclarationList(node) {
+            if (node.transformFlags & 64 /* ES2015 */) {
+                if (node.flags & 3 /* BlockScoped */) {
+                    enableSubstitutionsForBlockScopedBindings();
+                }
+                var declarations = ts.flatMap(node.declarations, node.flags & 1 /* Let */
+                    ? visitVariableDeclarationInLetDeclarationList
+                    : visitVariableDeclaration);
+                var declarationList = ts.createVariableDeclarationList(declarations);
+                ts.setOriginalNode(declarationList, node);
+                ts.setTextRange(declarationList, node);
+                ts.setCommentRange(declarationList, node);
+                if (node.transformFlags & 8388608 /* ContainsBindingPattern */
+                    && (ts.isBindingPattern(node.declarations[0].name) || ts.isBindingPattern(ts.last(node.declarations).name))) {
+                    // If the first or last declaration is a binding pattern, we need to modify
+                    // the source map range for the declaration list.
+                    var firstDeclaration = ts.firstOrUndefined(declarations);
+                    if (firstDeclaration) {
+                        ts.setSourceMapRange(declarationList, ts.createRange(firstDeclaration.pos, ts.last(declarations).end));
+                    }
+                }
+                return declarationList;
+            }
+            return ts.visitEachChild(node, visitor, context);
+        }
+        /**
+         * Gets a value indicating whether we should emit an explicit initializer for a variable
+         * declaration in a `let` declaration list.
+         *
+         * @param node A VariableDeclaration node.
+         */
+        function shouldEmitExplicitInitializerForLetDeclaration(node) {
+            // Nested let bindings might need to be initialized explicitly to preserve
+            // ES6 semantic:
+            //
+            //  { let x = 1; }
+            //  { let x; } // x here should be undefined. not 1
+            //
+            // Top level bindings never collide with anything and thus don't require
+            // explicit initialization. As for nested let bindings there are two cases:
+            //
+            // - Nested let bindings that were not renamed definitely should be
+            //   initialized explicitly:
+            //
+            //    { let x = 1; }
+            //    { let x; if (some-condition) { x = 1}; if (x) { /*1*/ } }
+            //
+            //   Without explicit initialization code in /*1*/ can be executed even if
+            //   some-condition is evaluated to false.
+            //
+            // - Renaming introduces fresh name that should not collide with any
+            //   existing names, however renamed bindings sometimes also should be
+            //   explicitly initialized. One particular case: non-captured binding
+            //   declared inside loop body (but not in loop initializer):
+            //
+            //    let x;
+            //    for (;;) {
+            //        let x;
+            //    }
+            //
+            //   In downlevel codegen inner 'x' will be renamed so it won't collide
+            //   with outer 'x' however it will should be reset on every iteration as
+            //   if it was declared anew.
+            //
+            //   * Why non-captured binding?
+            //     - Because if loop contains block scoped binding captured in some
+            //       function then loop body will be rewritten to have a fresh scope
+            //       on every iteration so everything will just work.
+            //
+            //   * Why loop initializer is excluded?
+            //     - Since we've introduced a fresh name it already will be undefined.
+            var flags = resolver.getNodeCheckFlags(node);
+            var isCapturedInFunction = flags & 131072 /* CapturedBlockScopedBinding */;
+            var isDeclaredInLoop = flags & 262144 /* BlockScopedBindingInLoop */;
+            var emittedAsTopLevel = (hierarchyFacts & 64 /* TopLevel */) !== 0
+                || (isCapturedInFunction
+                    && isDeclaredInLoop
+                    && (hierarchyFacts & 512 /* IterationStatementBlock */) !== 0);
+            var emitExplicitInitializer = !emittedAsTopLevel
+                && (hierarchyFacts & 2048 /* ForInOrForOfStatement */) === 0
+                && (!resolver.isDeclarationWithCollidingName(node)
+                    || (isDeclaredInLoop
+                        && !isCapturedInFunction
+                        && (hierarchyFacts & (1024 /* ForStatement */ | 2048 /* ForInOrForOfStatement */)) === 0));
+            return emitExplicitInitializer;
+        }
+        /**
+         * Visits a VariableDeclaration in a `let` declaration list.
+         *
+         * @param node A VariableDeclaration node.
+         */
+        function visitVariableDeclarationInLetDeclarationList(node) {
+            // For binding pattern names that lack initializers there is no point to emit
+            // explicit initializer since downlevel codegen for destructuring will fail
+            // in the absence of initializer so all binding elements will say uninitialized
+            var name = node.name;
+            if (ts.isBindingPattern(name)) {
+                return visitVariableDeclaration(node);
+            }
+            if (!node.initializer && shouldEmitExplicitInitializerForLetDeclaration(node)) {
+                var clone_2 = ts.getMutableClone(node);
+                clone_2.initializer = ts.createVoidZero();
+                return clone_2;
+            }
+            return ts.visitEachChild(node, visitor, context);
+        }
+        /**
+         * Visits a VariableDeclaration node with a binding pattern.
+         *
+         * @param node A VariableDeclaration node.
+         */
+        function visitVariableDeclaration(node) {
+            var ancestorFacts = enterSubtree(32 /* ExportedVariableStatement */, 0 /* None */);
+            var updated;
+            if (ts.isBindingPattern(node.name)) {
+                updated = ts.flattenDestructuringBinding(node, visitor, context, 0 /* All */, 
+                /*value*/ undefined, (ancestorFacts & 32 /* ExportedVariableStatement */) !== 0);
+            }
+            else {
+                updated = ts.visitEachChild(node, visitor, context);
+            }
+            exitSubtree(ancestorFacts, 0 /* None */, 0 /* None */);
+            return updated;
+        }
+        function recordLabel(node) {
+            convertedLoopState.labels.set(ts.idText(node.label), true);
+        }
+        function resetLabel(node) {
+            convertedLoopState.labels.set(ts.idText(node.label), false);
+        }
+        function visitLabeledStatement(node) {
+            if (convertedLoopState && !convertedLoopState.labels) {
+                convertedLoopState.labels = ts.createMap();
+            }
+            var statement = ts.unwrapInnermostStatementOfLabel(node, convertedLoopState && recordLabel);
+            return ts.isIterationStatement(statement, /*lookInLabeledStatements*/ false)
+                ? visitIterationStatement(statement, /*outermostLabeledStatement*/ node)
+                : ts.restoreEnclosingLabel(ts.visitNode(statement, visitor, ts.isStatement), node, convertedLoopState && resetLabel);
+        }
+        function visitIterationStatement(node, outermostLabeledStatement) {
+            switch (node.kind) {
+                case 218 /* DoStatement */:
+                case 219 /* WhileStatement */:
+                    return visitDoOrWhileStatement(node, outermostLabeledStatement);
+                case 220 /* ForStatement */:
+                    return visitForStatement(node, outermostLabeledStatement);
+                case 221 /* ForInStatement */:
+                    return visitForInStatement(node, outermostLabeledStatement);
+                case 222 /* ForOfStatement */:
+                    return visitForOfStatement(node, outermostLabeledStatement);
+            }
+        }
+        function visitIterationStatementWithFacts(excludeFacts, includeFacts, node, outermostLabeledStatement, convert) {
+            var ancestorFacts = enterSubtree(excludeFacts, includeFacts);
+            var updated = convertIterationStatementBodyIfNecessary(node, outermostLabeledStatement, convert);
+            exitSubtree(ancestorFacts, 0 /* None */, 0 /* None */);
+            return updated;
+        }
+        function visitDoOrWhileStatement(node, outermostLabeledStatement) {
+            return visitIterationStatementWithFacts(0 /* DoOrWhileStatementExcludes */, 256 /* DoOrWhileStatementIncludes */, node, outermostLabeledStatement);
+        }
+        function visitForStatement(node, outermostLabeledStatement) {
+            return visitIterationStatementWithFacts(3008 /* ForStatementExcludes */, 1280 /* ForStatementIncludes */, node, outermostLabeledStatement);
+        }
+        function visitForInStatement(node, outermostLabeledStatement) {
+            return visitIterationStatementWithFacts(1984 /* ForInOrForOfStatementExcludes */, 2304 /* ForInOrForOfStatementIncludes */, node, outermostLabeledStatement);
+        }
+        function visitForOfStatement(node, outermostLabeledStatement) {
+            return visitIterationStatementWithFacts(1984 /* ForInOrForOfStatementExcludes */, 2304 /* ForInOrForOfStatementIncludes */, node, outermostLabeledStatement, compilerOptions.downlevelIteration ? convertForOfStatementForIterable : convertForOfStatementForArray);
+        }
+        function convertForOfStatementHead(node, boundValue, convertedLoopBodyStatements) {
+            var statements = [];
+            var initializer = node.initializer;
+            if (ts.isVariableDeclarationList(initializer)) {
+                if (node.initializer.flags & 3 /* BlockScoped */) {
+                    enableSubstitutionsForBlockScopedBindings();
+                }
+                var firstOriginalDeclaration = ts.firstOrUndefined(initializer.declarations);
+                if (firstOriginalDeclaration && ts.isBindingPattern(firstOriginalDeclaration.name)) {
+                    // This works whether the declaration is a var, let, or const.
+                    // It will use rhsIterationValue _a[_i] as the initializer.
+                    var declarations = ts.flattenDestructuringBinding(firstOriginalDeclaration, visitor, context, 0 /* All */, boundValue);
+                    var declarationList = ts.setTextRange(ts.createVariableDeclarationList(declarations), node.initializer);
+                    ts.setOriginalNode(declarationList, node.initializer);
+                    // Adjust the source map range for the first declaration to align with the old
+                    // emitter.
+                    ts.setSourceMapRange(declarationList, ts.createRange(declarations[0].pos, ts.last(declarations).end));
+                    statements.push(ts.createVariableStatement(
+                    /*modifiers*/ undefined, declarationList));
+                }
+                else {
+                    // The following call does not include the initializer, so we have
+                    // to emit it separately.
+                    statements.push(ts.setTextRange(ts.createVariableStatement(
+                    /*modifiers*/ undefined, ts.setOriginalNode(ts.setTextRange(ts.createVariableDeclarationList([
+                        ts.createVariableDeclaration(firstOriginalDeclaration ? firstOriginalDeclaration.name : ts.createTempVariable(/*recordTempVariable*/ undefined), 
+                        /*type*/ undefined, boundValue)
+                    ]), ts.moveRangePos(initializer, -1)), initializer)), ts.moveRangeEnd(initializer, -1)));
+                }
+            }
+            else {
+                // Initializer is an expression. Emit the expression in the body, so that it's
+                // evaluated on every iteration.
+                var assignment = ts.createAssignment(initializer, boundValue);
+                if (ts.isDestructuringAssignment(assignment)) {
+                    ts.aggregateTransformFlags(assignment);
+                    statements.push(ts.createStatement(visitBinaryExpression(assignment, /*needsDestructuringValue*/ false)));
+                }
+                else {
+                    assignment.end = initializer.end;
+                    statements.push(ts.setTextRange(ts.createStatement(ts.visitNode(assignment, visitor, ts.isExpression)), ts.moveRangeEnd(initializer, -1)));
+                }
+            }
+            if (convertedLoopBodyStatements) {
+                return createSyntheticBlockForConvertedStatements(ts.addRange(statements, convertedLoopBodyStatements));
+            }
+            else {
+                var statement = ts.visitNode(node.statement, visitor, ts.isStatement, ts.liftToBlock);
+                if (ts.isBlock(statement)) {
+                    return ts.updateBlock(statement, ts.setTextRange(ts.createNodeArray(ts.concatenate(statements, statement.statements)), statement.statements));
+                }
+                else {
+                    statements.push(statement);
+                    return createSyntheticBlockForConvertedStatements(statements);
+                }
+            }
+        }
+        function createSyntheticBlockForConvertedStatements(statements) {
+            return ts.setEmitFlags(ts.createBlock(ts.createNodeArray(statements), 
+            /*multiLine*/ true), 48 /* NoSourceMap */ | 384 /* NoTokenSourceMaps */);
+        }
+        function convertForOfStatementForArray(node, outermostLabeledStatement, convertedLoopBodyStatements) {
+            // The following ES6 code:
+            //
+            //    for (let v of expr) { }
+            //
+            // should be emitted as
+            //
+            //    for (var _i = 0, _a = expr; _i < _a.length; _i++) {
+            //        var v = _a[_i];
+            //    }
+            //
+            // where _a and _i are temps emitted to capture the RHS and the counter,
+            // respectively.
+            // When the left hand side is an expression instead of a let declaration,
+            // the "let v" is not emitted.
+            // When the left hand side is a let/const, the v is renamed if there is
+            // another v in scope.
+            // Note that all assignments to the LHS are emitted in the body, including
+            // all destructuring.
+            // Note also that because an extra statement is needed to assign to the LHS,
+            // for-of bodies are always emitted as blocks.
+            var expression = ts.visitNode(node.expression, visitor, ts.isExpression);
+            // In the case where the user wrote an identifier as the RHS, like this:
+            //
+            //     for (let v of arr) { }
+            //
+            // we don't want to emit a temporary variable for the RHS, just use it directly.
+            var counter = ts.createLoopVariable();
+            var rhsReference = ts.isIdentifier(expression) ? ts.getGeneratedNameForNode(expression) : ts.createTempVariable(/*recordTempVariable*/ undefined);
+            // The old emitter does not emit source maps for the expression
+            ts.setEmitFlags(expression, 48 /* NoSourceMap */ | ts.getEmitFlags(expression));
+            var forStatement = ts.setTextRange(ts.createFor(
+            /*initializer*/ ts.setEmitFlags(ts.setTextRange(ts.createVariableDeclarationList([
+                ts.setTextRange(ts.createVariableDeclaration(counter, /*type*/ undefined, ts.createLiteral(0)), ts.moveRangePos(node.expression, -1)),
+                ts.setTextRange(ts.createVariableDeclaration(rhsReference, /*type*/ undefined, expression), node.expression)
+            ]), node.expression), 2097152 /* NoHoisting */), 
+            /*condition*/ ts.setTextRange(ts.createLessThan(counter, ts.createPropertyAccess(rhsReference, "length")), node.expression), 
+            /*incrementor*/ ts.setTextRange(ts.createPostfixIncrement(counter), node.expression), 
+            /*statement*/ convertForOfStatementHead(node, ts.createElementAccess(rhsReference, counter), convertedLoopBodyStatements)), 
+            /*location*/ node);
+            // Disable trailing source maps for the OpenParenToken to align source map emit with the old emitter.
+            ts.setEmitFlags(forStatement, 256 /* NoTokenTrailingSourceMaps */);
+            ts.setTextRange(forStatement, node);
+            return ts.restoreEnclosingLabel(forStatement, outermostLabeledStatement, convertedLoopState && resetLabel);
+        }
+        function convertForOfStatementForIterable(node, outermostLabeledStatement, convertedLoopBodyStatements) {
+            var expression = ts.visitNode(node.expression, visitor, ts.isExpression);
+            var iterator = ts.isIdentifier(expression) ? ts.getGeneratedNameForNode(expression) : ts.createTempVariable(/*recordTempVariable*/ undefined);
+            var result = ts.isIdentifier(expression) ? ts.getGeneratedNameForNode(iterator) : ts.createTempVariable(/*recordTempVariable*/ undefined);
+            var errorRecord = ts.createUniqueName("e");
+            var catchVariable = ts.getGeneratedNameForNode(errorRecord);
+            var returnMethod = ts.createTempVariable(/*recordTempVariable*/ undefined);
+            var values = ts.createValuesHelper(context, expression, node.expression);
+            var next = ts.createCall(ts.createPropertyAccess(iterator, "next"), /*typeArguments*/ undefined, []);
+            hoistVariableDeclaration(errorRecord);
+            hoistVariableDeclaration(returnMethod);
+            var forStatement = ts.setEmitFlags(ts.setTextRange(ts.createFor(
+            /*initializer*/ ts.setEmitFlags(ts.setTextRange(ts.createVariableDeclarationList([
+                ts.setTextRange(ts.createVariableDeclaration(iterator, /*type*/ undefined, values), node.expression),
+                ts.createVariableDeclaration(result, /*type*/ undefined, next)
+            ]), node.expression), 2097152 /* NoHoisting */), 
+            /*condition*/ ts.createLogicalNot(ts.createPropertyAccess(result, "done")), 
+            /*incrementor*/ ts.createAssignment(result, next), 
+            /*statement*/ convertForOfStatementHead(node, ts.createPropertyAccess(result, "value"), convertedLoopBodyStatements)), 
+            /*location*/ node), 256 /* NoTokenTrailingSourceMaps */);
+            return ts.createTry(ts.createBlock([
+                ts.restoreEnclosingLabel(forStatement, outermostLabeledStatement, convertedLoopState && resetLabel)
+            ]), ts.createCatchClause(ts.createVariableDeclaration(catchVariable), ts.setEmitFlags(ts.createBlock([
+                ts.createStatement(ts.createAssignment(errorRecord, ts.createObjectLiteral([
+                    ts.createPropertyAssignment("error", catchVariable)
+                ])))
+            ]), 1 /* SingleLine */)), ts.createBlock([
+                ts.createTry(
+                /*tryBlock*/ ts.createBlock([
+                    ts.setEmitFlags(ts.createIf(ts.createLogicalAnd(ts.createLogicalAnd(result, ts.createLogicalNot(ts.createPropertyAccess(result, "done"))), ts.createAssignment(returnMethod, ts.createPropertyAccess(iterator, "return"))), ts.createStatement(ts.createFunctionCall(returnMethod, iterator, []))), 1 /* SingleLine */),
+                ]), 
+                /*catchClause*/ undefined, 
+                /*finallyBlock*/ ts.setEmitFlags(ts.createBlock([
+                    ts.setEmitFlags(ts.createIf(errorRecord, ts.createThrow(ts.createPropertyAccess(errorRecord, "error"))), 1 /* SingleLine */)
+                ]), 1 /* SingleLine */))
+            ]));
+        }
+        /**
+         * Visits an ObjectLiteralExpression with computed property names.
+         *
+         * @param node An ObjectLiteralExpression node.
+         */
+        function visitObjectLiteralExpression(node) {
+            // We are here because a ComputedPropertyName was used somewhere in the expression.
+            var properties = node.properties;
+            var numProperties = properties.length;
+            // Find the first computed property.
+            // Everything until that point can be emitted as part of the initial object literal.
+            var numInitialProperties = numProperties;
+            var numInitialPropertiesWithoutYield = numProperties;
+            for (var i = 0; i < numProperties; i++) {
+                var property = properties[i];
+                if ((property.transformFlags & 16777216 /* ContainsYield */ && hierarchyFacts & 4 /* AsyncFunctionBody */)
+                    && i < numInitialPropertiesWithoutYield) {
+                    numInitialPropertiesWithoutYield = i;
+                }
+                if (property.name.kind === 147 /* ComputedPropertyName */) {
+                    numInitialProperties = i;
+                    break;
+                }
+            }
+            if (numInitialProperties !== numProperties) {
+                if (numInitialPropertiesWithoutYield < numInitialProperties) {
+                    numInitialProperties = numInitialPropertiesWithoutYield;
+                }
+                // For computed properties, we need to create a unique handle to the object
+                // literal so we can modify it without risking internal assignments tainting the object.
+                var temp = ts.createTempVariable(hoistVariableDeclaration);
+                // Write out the first non-computed properties, then emit the rest through indexing on the temp variable.
+                var expressions = [];
+                var assignment = ts.createAssignment(temp, ts.setEmitFlags(ts.createObjectLiteral(ts.visitNodes(properties, visitor, ts.isObjectLiteralElementLike, 0, numInitialProperties), node.multiLine), 65536 /* Indented */));
+                if (node.multiLine) {
+                    ts.startOnNewLine(assignment);
+                }
+                expressions.push(assignment);
+                addObjectLiteralMembers(expressions, node, temp, numInitialProperties);
+                // We need to clone the temporary identifier so that we can write it on a
+                // new line
+                expressions.push(node.multiLine ? ts.startOnNewLine(ts.getMutableClone(temp)) : temp);
+                return ts.inlineExpressions(expressions);
+            }
+            return ts.visitEachChild(node, visitor, context);
+        }
+        function shouldConvertIterationStatementBody(node) {
+            return (resolver.getNodeCheckFlags(node) & 65536 /* LoopWithCapturedBlockScopedBinding */) !== 0;
+        }
+        /**
+         * Records constituents of name for the given variable to be hoisted in the outer scope.
+         */
+        function hoistVariableDeclarationDeclaredInConvertedLoop(state, node) {
+            if (!state.hoistedLocalVariables) {
+                state.hoistedLocalVariables = [];
+            }
+            visit(node.name);
+            function visit(node) {
+                if (node.kind === 71 /* Identifier */) {
+                    state.hoistedLocalVariables.push(node);
+                }
+                else {
+                    for (var _i = 0, _a = node.elements; _i < _a.length; _i++) {
+                        var element = _a[_i];
+                        if (!ts.isOmittedExpression(element)) {
+                            visit(element.name);
+                        }
+                    }
+                }
+            }
+        }
+        function convertIterationStatementBodyIfNecessary(node, outermostLabeledStatement, convert) {
+            if (!shouldConvertIterationStatementBody(node)) {
+                var saveAllowedNonLabeledJumps = void 0;
+                if (convertedLoopState) {
+                    // we get here if we are trying to emit normal loop loop inside converted loop
+                    // set allowedNonLabeledJumps to Break | Continue to mark that break\continue inside the loop should be emitted as is
+                    saveAllowedNonLabeledJumps = convertedLoopState.allowedNonLabeledJumps;
+                    convertedLoopState.allowedNonLabeledJumps = 2 /* Break */ | 4 /* Continue */;
+                }
+                var result = convert
+                    ? convert(node, outermostLabeledStatement, /*convertedLoopBodyStatements*/ undefined)
+                    : ts.restoreEnclosingLabel(ts.visitEachChild(node, visitor, context), outermostLabeledStatement, convertedLoopState && resetLabel);
+                if (convertedLoopState) {
+                    convertedLoopState.allowedNonLabeledJumps = saveAllowedNonLabeledJumps;
+                }
+                return result;
+            }
+            var functionName = ts.createUniqueName("_loop");
+            var loopInitializer;
+            switch (node.kind) {
+                case 220 /* ForStatement */:
+                case 221 /* ForInStatement */:
+                case 222 /* ForOfStatement */:
+                    var initializer = node.initializer;
+                    if (initializer && initializer.kind === 233 /* VariableDeclarationList */) {
+                        loopInitializer = initializer;
+                    }
+                    break;
+            }
+            // variables that will be passed to the loop as parameters
+            var loopParameters = [];
+            // variables declared in the loop initializer that will be changed inside the loop
+            var loopOutParameters = [];
+            if (loopInitializer && (ts.getCombinedNodeFlags(loopInitializer) & 3 /* BlockScoped */)) {
+                for (var _i = 0, _a = loopInitializer.declarations; _i < _a.length; _i++) {
+                    var decl = _a[_i];
+                    processLoopVariableDeclaration(decl, loopParameters, loopOutParameters);
+                }
+            }
+            var outerConvertedLoopState = convertedLoopState;
+            convertedLoopState = { loopOutParameters: loopOutParameters };
+            if (outerConvertedLoopState) {
+                // convertedOuterLoopState !== undefined means that this converted loop is nested in another converted loop.
+                // if outer converted loop has already accumulated some state - pass it through
+                if (outerConvertedLoopState.argumentsName) {
+                    // outer loop has already used 'arguments' so we've already have some name to alias it
+                    // use the same name in all nested loops
+                    convertedLoopState.argumentsName = outerConvertedLoopState.argumentsName;
+                }
+                if (outerConvertedLoopState.thisName) {
+                    // outer loop has already used 'this' so we've already have some name to alias it
+                    // use the same name in all nested loops
+                    convertedLoopState.thisName = outerConvertedLoopState.thisName;
+                }
+                if (outerConvertedLoopState.hoistedLocalVariables) {
+                    // we've already collected some non-block scoped variable declarations in enclosing loop
+                    // use the same storage in nested loop
+                    convertedLoopState.hoistedLocalVariables = outerConvertedLoopState.hoistedLocalVariables;
+                }
+            }
+            startLexicalEnvironment();
+            var loopBody = ts.visitNode(node.statement, visitor, ts.isStatement, ts.liftToBlock);
+            var lexicalEnvironment = endLexicalEnvironment();
+            var currentState = convertedLoopState;
+            convertedLoopState = outerConvertedLoopState;
+            if (loopOutParameters.length || lexicalEnvironment) {
+                var statements_4 = ts.isBlock(loopBody) ? loopBody.statements.slice() : [loopBody];
+                if (loopOutParameters.length) {
+                    copyOutParameters(loopOutParameters, 1 /* ToOutParameter */, statements_4);
+                }
+                ts.prependStatements(statements_4, lexicalEnvironment);
+                loopBody = ts.createBlock(statements_4, /*multiline*/ true);
+            }
+            if (ts.isBlock(loopBody)) {
+                loopBody.multiLine = true;
+            }
+            else {
+                loopBody = ts.createBlock([loopBody], /*multiline*/ true);
+            }
+            var containsYield = (node.statement.transformFlags & 16777216 /* ContainsYield */) !== 0;
+            var isAsyncBlockContainingAwait = containsYield && (hierarchyFacts & 4 /* AsyncFunctionBody */) !== 0;
+            var loopBodyFlags = 0;
+            if (currentState.containsLexicalThis) {
+                loopBodyFlags |= 8 /* CapturesThis */;
+            }
+            if (isAsyncBlockContainingAwait) {
+                loopBodyFlags |= 262144 /* AsyncFunctionBody */;
+            }
+            var convertedLoopVariable = ts.createVariableStatement(
+            /*modifiers*/ undefined, ts.setEmitFlags(ts.createVariableDeclarationList([
+                ts.createVariableDeclaration(functionName, 
+                /*type*/ undefined, ts.setEmitFlags(ts.createFunctionExpression(
+                /*modifiers*/ undefined, containsYield ? ts.createToken(39 /* AsteriskToken */) : undefined, 
+                /*name*/ undefined, 
+                /*typeParameters*/ undefined, loopParameters, 
+                /*type*/ undefined, loopBody), loopBodyFlags))
+            ]), 2097152 /* NoHoisting */));
+            var statements = [convertedLoopVariable];
+            var extraVariableDeclarations;
+            // propagate state from the inner loop to the outer loop if necessary
+            if (currentState.argumentsName) {
+                // if alias for arguments is set
+                if (outerConvertedLoopState) {
+                    // pass it to outer converted loop
+                    outerConvertedLoopState.argumentsName = currentState.argumentsName;
+                }
+                else {
+                    // this is top level converted loop and we need to create an alias for 'arguments' object
+                    (extraVariableDeclarations || (extraVariableDeclarations = [])).push(ts.createVariableDeclaration(currentState.argumentsName, 
+                    /*type*/ undefined, ts.createIdentifier("arguments")));
+                }
+            }
+            if (currentState.thisName) {
+                // if alias for this is set
+                if (outerConvertedLoopState) {
+                    // pass it to outer converted loop
+                    outerConvertedLoopState.thisName = currentState.thisName;
+                }
+                else {
+                    // this is top level converted loop so we need to create an alias for 'this' here
+                    // NOTE:
+                    // if converted loops were all nested in arrow function then we'll always emit '_this' so convertedLoopState.thisName will not be set.
+                    // If it is set this means that all nested loops are not nested in arrow function and it is safe to capture 'this'.
+                    (extraVariableDeclarations || (extraVariableDeclarations = [])).push(ts.createVariableDeclaration(currentState.thisName, 
+                    /*type*/ undefined, ts.createIdentifier("this")));
+                }
+            }
+            if (currentState.hoistedLocalVariables) {
+                // if hoistedLocalVariables !== undefined this means that we've possibly collected some variable declarations to be hoisted later
+                if (outerConvertedLoopState) {
+                    // pass them to outer converted loop
+                    outerConvertedLoopState.hoistedLocalVariables = currentState.hoistedLocalVariables;
+                }
+                else {
+                    if (!extraVariableDeclarations) {
+                        extraVariableDeclarations = [];
+                    }
+                    // hoist collected variable declarations
+                    for (var _b = 0, _c = currentState.hoistedLocalVariables; _b < _c.length; _b++) {
+                        var identifier = _c[_b];
+                        extraVariableDeclarations.push(ts.createVariableDeclaration(identifier));
+                    }
+                }
+            }
+            // add extra variables to hold out parameters if necessary
+            if (loopOutParameters.length) {
+                if (!extraVariableDeclarations) {
+                    extraVariableDeclarations = [];
+                }
+                for (var _d = 0, loopOutParameters_1 = loopOutParameters; _d < loopOutParameters_1.length; _d++) {
+                    var outParam = loopOutParameters_1[_d];
+                    extraVariableDeclarations.push(ts.createVariableDeclaration(outParam.outParamName));
+                }
+            }
+            // create variable statement to hold all introduced variable declarations
+            if (extraVariableDeclarations) {
+                statements.push(ts.createVariableStatement(
+                /*modifiers*/ undefined, ts.createVariableDeclarationList(extraVariableDeclarations)));
+            }
+            var convertedLoopBodyStatements = generateCallToConvertedLoop(functionName, loopParameters, currentState, containsYield);
+            var loop;
+            if (convert) {
+                loop = convert(node, outermostLabeledStatement, convertedLoopBodyStatements);
+            }
+            else {
+                var clone_3 = ts.getMutableClone(node);
+                // clean statement part
+                clone_3.statement = undefined;
+                // visit childnodes to transform initializer/condition/incrementor parts
+                clone_3 = ts.visitEachChild(clone_3, visitor, context);
+                // set loop statement
+                clone_3.statement = ts.createBlock(convertedLoopBodyStatements, /*multiline*/ true);
+                // reset and re-aggregate the transform flags
+                clone_3.transformFlags = 0;
+                ts.aggregateTransformFlags(clone_3);
+                loop = ts.restoreEnclosingLabel(clone_3, outermostLabeledStatement, convertedLoopState && resetLabel);
+            }
+            statements.push(loop);
+            return statements;
+        }
+        function copyOutParameter(outParam, copyDirection) {
+            var source = copyDirection === 0 /* ToOriginal */ ? outParam.outParamName : outParam.originalName;
+            var target = copyDirection === 0 /* ToOriginal */ ? outParam.originalName : outParam.outParamName;
+            return ts.createBinary(target, 58 /* EqualsToken */, source);
+        }
+        function copyOutParameters(outParams, copyDirection, statements) {
+            for (var _i = 0, outParams_1 = outParams; _i < outParams_1.length; _i++) {
+                var outParam = outParams_1[_i];
+                statements.push(ts.createStatement(copyOutParameter(outParam, copyDirection)));
+            }
+        }
+        function generateCallToConvertedLoop(loopFunctionExpressionName, parameters, state, isAsyncBlockContainingAwait) {
+            var outerConvertedLoopState = convertedLoopState;
+            var statements = [];
+            // loop is considered simple if it does not have any return statements or break\continue that transfer control outside of the loop
+            // simple loops are emitted as just 'loop()';
+            // NOTE: if loop uses only 'continue' it still will be emitted as simple loop
+            var isSimpleLoop = !(state.nonLocalJumps & ~4 /* Continue */) &&
+                !state.labeledNonLocalBreaks &&
+                !state.labeledNonLocalContinues;
+            var call = ts.createCall(loopFunctionExpressionName, /*typeArguments*/ undefined, ts.map(parameters, function (p) { return p.name; }));
+            var callResult = isAsyncBlockContainingAwait
+                ? ts.createYield(ts.createToken(39 /* AsteriskToken */), ts.setEmitFlags(call, 8388608 /* Iterator */))
+                : call;
+            if (isSimpleLoop) {
+                statements.push(ts.createStatement(callResult));
+                copyOutParameters(state.loopOutParameters, 0 /* ToOriginal */, statements);
+            }
+            else {
+                var loopResultName = ts.createUniqueName("state");
+                var stateVariable = ts.createVariableStatement(
+                /*modifiers*/ undefined, ts.createVariableDeclarationList([ts.createVariableDeclaration(loopResultName, /*type*/ undefined, callResult)]));
+                statements.push(stateVariable);
+                copyOutParameters(state.loopOutParameters, 0 /* ToOriginal */, statements);
+                if (state.nonLocalJumps & 8 /* Return */) {
+                    var returnStatement = void 0;
+                    if (outerConvertedLoopState) {
+                        outerConvertedLoopState.nonLocalJumps |= 8 /* Return */;
+                        returnStatement = ts.createReturn(loopResultName);
+                    }
+                    else {
+                        returnStatement = ts.createReturn(ts.createPropertyAccess(loopResultName, "value"));
+                    }
+                    statements.push(ts.createIf(ts.createBinary(ts.createTypeOf(loopResultName), 34 /* EqualsEqualsEqualsToken */, ts.createLiteral("object")), returnStatement));
+                }
+                if (state.nonLocalJumps & 2 /* Break */) {
+                    statements.push(ts.createIf(ts.createBinary(loopResultName, 34 /* EqualsEqualsEqualsToken */, ts.createLiteral("break")), ts.createBreak()));
+                }
+                if (state.labeledNonLocalBreaks || state.labeledNonLocalContinues) {
+                    var caseClauses = [];
+                    processLabeledJumps(state.labeledNonLocalBreaks, /*isBreak*/ true, loopResultName, outerConvertedLoopState, caseClauses);
+                    processLabeledJumps(state.labeledNonLocalContinues, /*isBreak*/ false, loopResultName, outerConvertedLoopState, caseClauses);
+                    statements.push(ts.createSwitch(loopResultName, ts.createCaseBlock(caseClauses)));
+                }
+            }
+            return statements;
+        }
+        function setLabeledJump(state, isBreak, labelText, labelMarker) {
+            if (isBreak) {
+                if (!state.labeledNonLocalBreaks) {
+                    state.labeledNonLocalBreaks = ts.createMap();
+                }
+                state.labeledNonLocalBreaks.set(labelText, labelMarker);
+            }
+            else {
+                if (!state.labeledNonLocalContinues) {
+                    state.labeledNonLocalContinues = ts.createMap();
+                }
+                state.labeledNonLocalContinues.set(labelText, labelMarker);
+            }
+        }
+        function processLabeledJumps(table, isBreak, loopResultName, outerLoop, caseClauses) {
+            if (!table) {
+                return;
+            }
+            table.forEach(function (labelMarker, labelText) {
+                var statements = [];
+                // if there are no outer converted loop or outer label in question is located inside outer converted loop
+                // then emit labeled break\continue
+                // otherwise propagate pair 'label -> marker' to outer converted loop and emit 'return labelMarker' so outer loop can later decide what to do
+                if (!outerLoop || (outerLoop.labels && outerLoop.labels.get(labelText))) {
+                    var label = ts.createIdentifier(labelText);
+                    statements.push(isBreak ? ts.createBreak(label) : ts.createContinue(label));
+                }
+                else {
+                    setLabeledJump(outerLoop, isBreak, labelText, labelMarker);
+                    statements.push(ts.createReturn(loopResultName));
+                }
+                caseClauses.push(ts.createCaseClause(ts.createLiteral(labelMarker), statements));
+            });
+        }
+        function processLoopVariableDeclaration(decl, loopParameters, loopOutParameters) {
+            var name = decl.name;
+            if (ts.isBindingPattern(name)) {
+                for (var _i = 0, _a = name.elements; _i < _a.length; _i++) {
+                    var element = _a[_i];
+                    if (!ts.isOmittedExpression(element)) {
+                        processLoopVariableDeclaration(element, loopParameters, loopOutParameters);
+                    }
+                }
+            }
+            else {
+                loopParameters.push(ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, name));
+                if (resolver.getNodeCheckFlags(decl) & 2097152 /* NeedsLoopOutParameter */) {
+                    var outParamName = ts.createUniqueName("out_" + ts.idText(name));
+                    loopOutParameters.push({ originalName: name, outParamName: outParamName });
+                }
+            }
+        }
+        /**
+         * Adds the members of an object literal to an array of expressions.
+         *
+         * @param expressions An array of expressions.
+         * @param node An ObjectLiteralExpression node.
+         * @param receiver The receiver for members of the ObjectLiteralExpression.
+         * @param numInitialNonComputedProperties The number of initial properties without
+         *                                        computed property names.
+         */
+        function addObjectLiteralMembers(expressions, node, receiver, start) {
+            var properties = node.properties;
+            var numProperties = properties.length;
+            for (var i = start; i < numProperties; i++) {
+                var property = properties[i];
+                switch (property.kind) {
+                    case 156 /* GetAccessor */:
+                    case 157 /* SetAccessor */:
+                        var accessors = ts.getAllAccessorDeclarations(node.properties, property);
+                        if (property === accessors.firstAccessor) {
+                            expressions.push(transformAccessorsToExpression(receiver, accessors, node, !!node.multiLine));
+                        }
+                        break;
+                    case 154 /* MethodDeclaration */:
+                        expressions.push(transformObjectLiteralMethodDeclarationToExpression(property, receiver, node, node.multiLine));
+                        break;
+                    case 270 /* PropertyAssignment */:
+                        expressions.push(transformPropertyAssignmentToExpression(property, receiver, node.multiLine));
+                        break;
+                    case 271 /* ShorthandPropertyAssignment */:
+                        expressions.push(transformShorthandPropertyAssignmentToExpression(property, receiver, node.multiLine));
+                        break;
+                    default:
+                        ts.Debug.failBadSyntaxKind(node);
+                        break;
+                }
+            }
+        }
+        /**
+         * Transforms a PropertyAssignment node into an expression.
+         *
+         * @param node The ObjectLiteralExpression that contains the PropertyAssignment.
+         * @param property The PropertyAssignment node.
+         * @param receiver The receiver for the assignment.
+         */
+        function transformPropertyAssignmentToExpression(property, receiver, startsOnNewLine) {
+            var expression = ts.createAssignment(ts.createMemberAccessForPropertyName(receiver, ts.visitNode(property.name, visitor, ts.isPropertyName)), ts.visitNode(property.initializer, visitor, ts.isExpression));
+            ts.setTextRange(expression, property);
+            if (startsOnNewLine) {
+                ts.startOnNewLine(expression);
+            }
+            return expression;
+        }
+        /**
+         * Transforms a ShorthandPropertyAssignment node into an expression.
+         *
+         * @param node The ObjectLiteralExpression that contains the ShorthandPropertyAssignment.
+         * @param property The ShorthandPropertyAssignment node.
+         * @param receiver The receiver for the assignment.
+         */
+        function transformShorthandPropertyAssignmentToExpression(property, receiver, startsOnNewLine) {
+            var expression = ts.createAssignment(ts.createMemberAccessForPropertyName(receiver, ts.visitNode(property.name, visitor, ts.isPropertyName)), ts.getSynthesizedClone(property.name));
+            ts.setTextRange(expression, property);
+            if (startsOnNewLine) {
+                ts.startOnNewLine(expression);
+            }
+            return expression;
+        }
+        /**
+         * Transforms a MethodDeclaration of an ObjectLiteralExpression into an expression.
+         *
+         * @param node The ObjectLiteralExpression that contains the MethodDeclaration.
+         * @param method The MethodDeclaration node.
+         * @param receiver The receiver for the assignment.
+         */
+        function transformObjectLiteralMethodDeclarationToExpression(method, receiver, container, startsOnNewLine) {
+            var ancestorFacts = enterSubtree(0 /* None */, 0 /* None */);
+            var expression = ts.createAssignment(ts.createMemberAccessForPropertyName(receiver, ts.visitNode(method.name, visitor, ts.isPropertyName)), transformFunctionLikeToExpression(method, /*location*/ method, /*name*/ undefined, container));
+            ts.setTextRange(expression, method);
+            if (startsOnNewLine) {
+                ts.startOnNewLine(expression);
+            }
+            exitSubtree(ancestorFacts, 49152 /* PropagateNewTargetMask */, hierarchyFacts & 49152 /* PropagateNewTargetMask */ ? 16384 /* NewTarget */ : 0 /* None */);
+            return expression;
+        }
+        function visitCatchClause(node) {
+            var ancestorFacts = enterSubtree(4032 /* BlockScopeExcludes */, 0 /* BlockScopeIncludes */);
+            var updated;
+            ts.Debug.assert(!!node.variableDeclaration, "Catch clause variable should always be present when downleveling ES2015.");
+            if (ts.isBindingPattern(node.variableDeclaration.name)) {
+                var temp = ts.createTempVariable(/*recordTempVariable*/ undefined);
+                var newVariableDeclaration = ts.createVariableDeclaration(temp);
+                ts.setTextRange(newVariableDeclaration, node.variableDeclaration);
+                var vars = ts.flattenDestructuringBinding(node.variableDeclaration, visitor, context, 0 /* All */, temp);
+                var list = ts.createVariableDeclarationList(vars);
+                ts.setTextRange(list, node.variableDeclaration);
+                var destructure = ts.createVariableStatement(/*modifiers*/ undefined, list);
+                updated = ts.updateCatchClause(node, newVariableDeclaration, addStatementToStartOfBlock(node.block, destructure));
+            }
+            else {
+                updated = ts.visitEachChild(node, visitor, context);
+            }
+            exitSubtree(ancestorFacts, 0 /* None */, 0 /* None */);
+            return updated;
+        }
+        function addStatementToStartOfBlock(block, statement) {
+            var transformedStatements = ts.visitNodes(block.statements, visitor, ts.isStatement);
+            return ts.updateBlock(block, [statement].concat(transformedStatements));
+        }
+        /**
+         * Visits a MethodDeclaration of an ObjectLiteralExpression and transforms it into a
+         * PropertyAssignment.
+         *
+         * @param node A MethodDeclaration node.
+         */
+        function visitMethodDeclaration(node) {
+            // We should only get here for methods on an object literal with regular identifier names.
+            // Methods on classes are handled in visitClassDeclaration/visitClassExpression.
+            // Methods with computed property names are handled in visitObjectLiteralExpression.
+            ts.Debug.assert(!ts.isComputedPropertyName(node.name));
+            var functionExpression = transformFunctionLikeToExpression(node, /*location*/ ts.moveRangePos(node, -1), /*name*/ undefined, /*container*/ undefined);
+            ts.setEmitFlags(functionExpression, 512 /* NoLeadingComments */ | ts.getEmitFlags(functionExpression));
+            return ts.setTextRange(ts.createPropertyAssignment(node.name, functionExpression), 
+            /*location*/ node);
+        }
+        /**
+         * Visits an AccessorDeclaration of an ObjectLiteralExpression.
+         *
+         * @param node An AccessorDeclaration node.
+         */
+        function visitAccessorDeclaration(node) {
+            ts.Debug.assert(!ts.isComputedPropertyName(node.name));
+            var savedConvertedLoopState = convertedLoopState;
+            convertedLoopState = undefined;
+            var ancestorFacts = enterSubtree(16286 /* FunctionExcludes */, 65 /* FunctionIncludes */);
+            var updated;
+            var parameters = ts.visitParameterList(node.parameters, visitor, context);
+            var body = node.transformFlags & (32768 /* ContainsCapturedLexicalThis */ | 128 /* ContainsES2015 */)
+                ? transformFunctionBody(node)
+                : visitFunctionBodyDownLevel(node);
+            if (node.kind === 156 /* GetAccessor */) {
+                updated = ts.updateGetAccessor(node, node.decorators, node.modifiers, node.name, parameters, node.type, body);
+            }
+            else {
+                updated = ts.updateSetAccessor(node, node.decorators, node.modifiers, node.name, parameters, body);
+            }
+            exitSubtree(ancestorFacts, 49152 /* PropagateNewTargetMask */, 0 /* None */);
+            convertedLoopState = savedConvertedLoopState;
+            return updated;
+        }
+        /**
+         * Visits a ShorthandPropertyAssignment and transforms it into a PropertyAssignment.
+         *
+         * @param node A ShorthandPropertyAssignment node.
+         */
+        function visitShorthandPropertyAssignment(node) {
+            return ts.setTextRange(ts.createPropertyAssignment(node.name, ts.getSynthesizedClone(node.name)), 
+            /*location*/ node);
+        }
+        function visitComputedPropertyName(node) {
+            var ancestorFacts = enterSubtree(0 /* ComputedPropertyNameExcludes */, 8192 /* ComputedPropertyNameIncludes */);
+            var updated = ts.visitEachChild(node, visitor, context);
+            exitSubtree(ancestorFacts, 49152 /* PropagateNewTargetMask */, hierarchyFacts & 49152 /* PropagateNewTargetMask */ ? 32768 /* NewTargetInComputedPropertyName */ : 0 /* None */);
+            return updated;
+        }
+        /**
+         * Visits a YieldExpression node.
+         *
+         * @param node A YieldExpression node.
+         */
+        function visitYieldExpression(node) {
+            // `yield` expressions are transformed using the generators transformer.
+            return ts.visitEachChild(node, visitor, context);
+        }
+        /**
+         * Visits an ArrayLiteralExpression that contains a spread element.
+         *
+         * @param node An ArrayLiteralExpression node.
+         */
+        function visitArrayLiteralExpression(node) {
+            if (node.transformFlags & 64 /* ES2015 */) {
+                // We are here because we contain a SpreadElementExpression.
+                return transformAndSpreadElements(node.elements, /*needsUniqueCopy*/ true, !!node.multiLine, /*hasTrailingComma*/ !!node.elements.hasTrailingComma);
+            }
+            return ts.visitEachChild(node, visitor, context);
+        }
+        /**
+         * Visits a CallExpression that contains either a spread element or `super`.
+         *
+         * @param node a CallExpression.
+         */
+        function visitCallExpression(node) {
+            if (ts.getEmitFlags(node) & 33554432 /* TypeScriptClassWrapper */) {
+                return visitTypeScriptClassWrapper(node);
+            }
+            if (node.transformFlags & 64 /* ES2015 */) {
+                return visitCallExpressionWithPotentialCapturedThisAssignment(node, /*assignToCapturedThis*/ true);
+            }
+            return ts.updateCall(node, ts.visitNode(node.expression, callExpressionVisitor, ts.isExpression), 
+            /*typeArguments*/ undefined, ts.visitNodes(node.arguments, visitor, ts.isExpression));
+        }
+        function visitTypeScriptClassWrapper(node) {
+            // This is a call to a class wrapper function (an IIFE) created by the 'ts' transformer.
+            // The wrapper has a form similar to:
+            //
+            //  (function() {
+            //      class C { // 1
+            //      }
+            //      C.x = 1; // 2
+            //      return C;
+            //  }())
+            //
+            // When we transform the class, we end up with something like this:
+            //
+            //  (function () {
+            //      var C = (function () { // 3
+            //          function C() {
+            //          }
+            //          return C; // 4
+            //      }());
+            //      C.x = 1;
+            //      return C;
+            //  }())
+            //
+            // We want to simplify the two nested IIFEs to end up with something like this:
+            //
+            //  (function () {
+            //      function C() {
+            //      }
+            //      C.x = 1;
+            //      return C;
+            //  }())
+            // We skip any outer expressions in a number of places to get to the innermost
+            // expression, but we will restore them later to preserve comments and source maps.
+            var body = ts.cast(ts.cast(ts.skipOuterExpressions(node.expression), ts.isArrowFunction).body, ts.isBlock);
+            // The class statements are the statements generated by visiting the first statement with initializer of the
+            // body (1), while all other statements are added to remainingStatements (2)
+            var isVariableStatementWithInitializer = function (stmt) { return ts.isVariableStatement(stmt) && !!ts.first(stmt.declarationList.declarations).initializer; };
+            var bodyStatements = ts.visitNodes(body.statements, visitor, ts.isStatement);
+            var classStatements = ts.filter(bodyStatements, isVariableStatementWithInitializer);
+            var remainingStatements = ts.filter(bodyStatements, function (stmt) { return !isVariableStatementWithInitializer(stmt); });
+            var varStatement = ts.cast(ts.first(classStatements), ts.isVariableStatement);
+            // We know there is only one variable declaration here as we verified this in an
+            // earlier call to isTypeScriptClassWrapper
+            var variable = varStatement.declarationList.declarations[0];
+            var initializer = ts.skipOuterExpressions(variable.initializer);
+            // Under certain conditions, the 'ts' transformer may introduce a class alias, which
+            // we see as an assignment, for example:
+            //
+            //  (function () {
+            //      var C_1;
+            //      var C = C_1 = (function () {
+            //          function C() {
+            //          }
+            //          C.x = function () { return C_1; }
+            //          return C;
+            //      }());
+            //      C = C_1 = __decorate([dec], C);
+            //      return C;
+            //  }())
+            //
+            var aliasAssignment = ts.tryCast(initializer, ts.isAssignmentExpression);
+            // The underlying call (3) is another IIFE that may contain a '_super' argument.
+            var call = ts.cast(aliasAssignment ? ts.skipOuterExpressions(aliasAssignment.right) : initializer, ts.isCallExpression);
+            var func = ts.cast(ts.skipOuterExpressions(call.expression), ts.isFunctionExpression);
+            var funcStatements = func.body.statements;
+            var classBodyStart = 0;
+            var classBodyEnd = -1;
+            var statements = [];
+            if (aliasAssignment) {
+                // If we have a class alias assignment, we need to move it to the down-level constructor
+                // function we generated for the class.
+                var extendsCall = ts.tryCast(funcStatements[classBodyStart], ts.isExpressionStatement);
+                if (extendsCall) {
+                    statements.push(extendsCall);
+                    classBodyStart++;
+                }
+                // The next statement is the function declaration.
+                statements.push(funcStatements[classBodyStart]);
+                classBodyStart++;
+                // Add the class alias following the declaration.
+                statements.push(ts.createStatement(ts.createAssignment(aliasAssignment.left, ts.cast(variable.name, ts.isIdentifier))));
+            }
+            // Find the trailing 'return' statement (4)
+            while (!ts.isReturnStatement(ts.elementAt(funcStatements, classBodyEnd))) {
+                classBodyEnd--;
+            }
+            // When we extract the statements of the inner IIFE, we exclude the 'return' statement (4)
+            // as we already have one that has been introduced by the 'ts' transformer.
+            ts.addRange(statements, funcStatements, classBodyStart, classBodyEnd);
+            if (classBodyEnd < -1) {
+                // If there were any hoisted declarations following the return statement, we should
+                // append them.
+                ts.addRange(statements, funcStatements, classBodyEnd + 1);
+            }
+            // Add the remaining statements of the outer wrapper.
+            ts.addRange(statements, remainingStatements);
+            // The 'es2015' class transform may add an end-of-declaration marker. If so we will add it
+            // after the remaining statements from the 'ts' transformer.
+            ts.addRange(statements, classStatements, /*start*/ 1);
+            // Recreate any outer parentheses or partially-emitted expressions to preserve source map
+            // and comment locations.
+            return ts.recreateOuterExpressions(node.expression, ts.recreateOuterExpressions(variable.initializer, ts.recreateOuterExpressions(aliasAssignment && aliasAssignment.right, ts.updateCall(call, ts.recreateOuterExpressions(call.expression, ts.updateFunctionExpression(func, 
+            /*modifiers*/ undefined, 
+            /*asteriskToken*/ undefined, 
+            /*name*/ undefined, 
+            /*typeParameters*/ undefined, func.parameters, 
+            /*type*/ undefined, ts.updateBlock(func.body, statements))), 
+            /*typeArguments*/ undefined, call.arguments))));
+        }
+        function visitImmediateSuperCallInBody(node) {
+            return visitCallExpressionWithPotentialCapturedThisAssignment(node, /*assignToCapturedThis*/ false);
+        }
+        function visitCallExpressionWithPotentialCapturedThisAssignment(node, assignToCapturedThis) {
+            // We are here either because SuperKeyword was used somewhere in the expression, or
+            // because we contain a SpreadElementExpression.
+            if (node.transformFlags & 524288 /* ContainsSpread */ ||
+                node.expression.kind === 97 /* SuperKeyword */ ||
+                ts.isSuperProperty(ts.skipOuterExpressions(node.expression))) {
+                var _a = ts.createCallBinding(node.expression, hoistVariableDeclaration), target = _a.target, thisArg = _a.thisArg;
+                if (node.expression.kind === 97 /* SuperKeyword */) {
+                    ts.setEmitFlags(thisArg, 4 /* NoSubstitution */);
+                }
+                var resultingCall = void 0;
+                if (node.transformFlags & 524288 /* ContainsSpread */) {
+                    // [source]
+                    //      f(...a, b)
+                    //      x.m(...a, b)
+                    //      super(...a, b)
+                    //      super.m(...a, b) // in static
+                    //      super.m(...a, b) // in instance
+                    //
+                    // [output]
+                    //      f.apply(void 0, a.concat([b]))
+                    //      (_a = x).m.apply(_a, a.concat([b]))
+                    //      _super.apply(this, a.concat([b]))
+                    //      _super.m.apply(this, a.concat([b]))
+                    //      _super.prototype.m.apply(this, a.concat([b]))
+                    resultingCall = ts.createFunctionApply(ts.visitNode(target, callExpressionVisitor, ts.isExpression), ts.visitNode(thisArg, visitor, ts.isExpression), transformAndSpreadElements(node.arguments, /*needsUniqueCopy*/ false, /*multiLine*/ false, /*hasTrailingComma*/ false));
+                }
+                else {
+                    // [source]
+                    //      super(a)
+                    //      super.m(a) // in static
+                    //      super.m(a) // in instance
+                    //
+                    // [output]
+                    //      _super.call(this, a)
+                    //      _super.m.call(this, a)
+                    //      _super.prototype.m.call(this, a)
+                    resultingCall = ts.createFunctionCall(ts.visitNode(target, callExpressionVisitor, ts.isExpression), ts.visitNode(thisArg, visitor, ts.isExpression), ts.visitNodes(node.arguments, visitor, ts.isExpression), 
+                    /*location*/ node);
+                }
+                if (node.expression.kind === 97 /* SuperKeyword */) {
+                    var actualThis = ts.createThis();
+                    ts.setEmitFlags(actualThis, 4 /* NoSubstitution */);
+                    var initializer = ts.createLogicalOr(resultingCall, actualThis);
+                    resultingCall = assignToCapturedThis
+                        ? ts.createAssignment(ts.createFileLevelUniqueName("_this"), initializer)
+                        : initializer;
+                }
+                return ts.setOriginalNode(resultingCall, node);
+            }
+            return ts.visitEachChild(node, visitor, context);
+        }
+        /**
+         * Visits a NewExpression that contains a spread element.
+         *
+         * @param node A NewExpression node.
+         */
+        function visitNewExpression(node) {
+            if (node.transformFlags & 524288 /* ContainsSpread */) {
+                // We are here because we contain a SpreadElementExpression.
+                // [source]
+                //      new C(...a)
+                //
+                // [output]
+                //      new ((_a = C).bind.apply(_a, [void 0].concat(a)))()
+                var _a = ts.createCallBinding(ts.createPropertyAccess(node.expression, "bind"), hoistVariableDeclaration), target = _a.target, thisArg = _a.thisArg;
+                return ts.createNew(ts.createFunctionApply(ts.visitNode(target, visitor, ts.isExpression), thisArg, transformAndSpreadElements(ts.createNodeArray([ts.createVoidZero()].concat(node.arguments)), /*needsUniqueCopy*/ false, /*multiLine*/ false, /*hasTrailingComma*/ false)), 
+                /*typeArguments*/ undefined, []);
+            }
+            return ts.visitEachChild(node, visitor, context);
+        }
+        /**
+         * Transforms an array of Expression nodes that contains a SpreadExpression.
+         *
+         * @param elements The array of Expression nodes.
+         * @param needsUniqueCopy A value indicating whether to ensure that the result is a fresh array.
+         * @param multiLine A value indicating whether the result should be emitted on multiple lines.
+         */
+        function transformAndSpreadElements(elements, needsUniqueCopy, multiLine, hasTrailingComma) {
+            // [source]
+            //      [a, ...b, c]
+            //
+            // [output]
+            //      [a].concat(b, [c])
+            // Map spans of spread expressions into their expressions and spans of other
+            // expressions into an array literal.
+            var numElements = elements.length;
+            var segments = ts.flatten(ts.spanMap(elements, partitionSpread, function (partition, visitPartition, _start, end) {
+                return visitPartition(partition, multiLine, hasTrailingComma && end === numElements);
+            }));
+            if (compilerOptions.downlevelIteration) {
+                if (segments.length === 1) {
+                    var firstSegment = segments[0];
+                    if (ts.isCallExpression(firstSegment)
+                        && ts.isIdentifier(firstSegment.expression)
+                        && (ts.getEmitFlags(firstSegment.expression) & 4096 /* HelperName */)
+                        && firstSegment.expression.escapedText === "___spread") {
+                        return segments[0];
+                    }
+                }
+                return ts.createSpreadHelper(context, segments);
+            }
+            else {
+                if (segments.length === 1) {
+                    var firstElement = elements[0];
+                    return needsUniqueCopy && ts.isSpreadElement(firstElement) && firstElement.expression.kind !== 183 /* ArrayLiteralExpression */
+                        ? ts.createArraySlice(segments[0])
+                        : segments[0];
+                }
+                // Rewrite using the pattern <segment0>.concat(<segment1>, <segment2>, ...)
+                return ts.createArrayConcat(segments.shift(), segments);
+            }
+        }
+        function partitionSpread(node) {
+            return ts.isSpreadElement(node)
+                ? visitSpanOfSpreads
+                : visitSpanOfNonSpreads;
+        }
+        function visitSpanOfSpreads(chunk) {
+            return ts.map(chunk, visitExpressionOfSpread);
+        }
+        function visitSpanOfNonSpreads(chunk, multiLine, hasTrailingComma) {
+            return ts.createArrayLiteral(ts.visitNodes(ts.createNodeArray(chunk, hasTrailingComma), visitor, ts.isExpression), multiLine);
+        }
+        function visitSpreadElement(node) {
+            return ts.visitNode(node.expression, visitor, ts.isExpression);
+        }
+        /**
+         * Transforms the expression of a SpreadExpression node.
+         *
+         * @param node A SpreadExpression node.
+         */
+        function visitExpressionOfSpread(node) {
+            return ts.visitNode(node.expression, visitor, ts.isExpression);
+        }
+        /**
+         * Visits a template literal.
+         *
+         * @param node A template literal.
+         */
+        function visitTemplateLiteral(node) {
+            return ts.setTextRange(ts.createLiteral(node.text), node);
+        }
+        /**
+         * Visits a string literal with an extended unicode escape.
+         *
+         * @param node A string literal.
+         */
+        function visitStringLiteral(node) {
+            if (node.hasExtendedUnicodeEscape) {
+                return ts.setTextRange(ts.createLiteral(node.text), node);
+            }
+            return node;
+        }
+        /**
+         * Visits a binary or octal (ES6) numeric literal.
+         *
+         * @param node A string literal.
+         */
+        function visitNumericLiteral(node) {
+            if (node.numericLiteralFlags & 384 /* BinaryOrOctalSpecifier */) {
+                return ts.setTextRange(ts.createNumericLiteral(node.text), node);
+            }
+            return node;
+        }
+        /**
+         * Visits a TaggedTemplateExpression node.
+         *
+         * @param node A TaggedTemplateExpression node.
+         */
+        function visitTaggedTemplateExpression(node) {
+            // Visit the tag expression
+            var tag = ts.visitNode(node.tag, visitor, ts.isExpression);
+            // Build up the template arguments and the raw and cooked strings for the template.
+            // We start out with 'undefined' for the first argument and revisit later
+            // to avoid walking over the template string twice and shifting all our arguments over after the fact.
+            var templateArguments = [undefined];
+            var cookedStrings = [];
+            var rawStrings = [];
+            var template = node.template;
+            if (ts.isNoSubstitutionTemplateLiteral(template)) {
+                cookedStrings.push(ts.createLiteral(template.text));
+                rawStrings.push(getRawLiteral(template));
+            }
+            else {
+                cookedStrings.push(ts.createLiteral(template.head.text));
+                rawStrings.push(getRawLiteral(template.head));
+                for (var _i = 0, _a = template.templateSpans; _i < _a.length; _i++) {
+                    var templateSpan = _a[_i];
+                    cookedStrings.push(ts.createLiteral(templateSpan.literal.text));
+                    rawStrings.push(getRawLiteral(templateSpan.literal));
+                    templateArguments.push(ts.visitNode(templateSpan.expression, visitor, ts.isExpression));
+                }
+            }
+            var helperCall = createTemplateObjectHelper(context, ts.createArrayLiteral(cookedStrings), ts.createArrayLiteral(rawStrings));
+            // Create a variable to cache the template object if we're in a module.
+            // Do not do this in the global scope, as any variable we currently generate could conflict with
+            // variables from outside of the current compilation. In the future, we can revisit this behavior.
+            if (ts.isExternalModule(currentSourceFile)) {
+                var tempVar = ts.createUniqueName("templateObject");
+                recordTaggedTemplateString(tempVar);
+                templateArguments[0] = ts.createLogicalOr(tempVar, ts.createAssignment(tempVar, helperCall));
+            }
+            else {
+                templateArguments[0] = helperCall;
+            }
+            return ts.createCall(tag, /*typeArguments*/ undefined, templateArguments);
+        }
+        /**
+         * Creates an ES5 compatible literal from an ES6 template literal.
+         *
+         * @param node The ES6 template literal.
+         */
+        function getRawLiteral(node) {
+            // Find original source text, since we need to emit the raw strings of the tagged template.
+            // The raw strings contain the (escaped) strings of what the user wrote.
+            // Examples: `\n` is converted to "\\n", a template string with a newline to "\n".
+            var text = ts.getSourceTextOfNodeFromSourceFile(currentSourceFile, node);
+            // text contains the original source, it will also contain quotes ("`"), dolar signs and braces ("${" and "}"),
+            // thus we need to remove those characters.
+            // First template piece starts with "`", others with "}"
+            // Last template piece ends with "`", others with "${"
+            var isLast = node.kind === 13 /* NoSubstitutionTemplateLiteral */ || node.kind === 16 /* TemplateTail */;
+            text = text.substring(1, text.length - (isLast ? 1 : 2));
+            // Newline normalization:
+            // ES6 Spec 11.8.6.1 - Static Semantics of TV's and TRV's
+            // <CR><LF> and <CR> LineTerminatorSequences are normalized to <LF> for both TV and TRV.
+            text = text.replace(/\r\n?/g, "\n");
+            return ts.setTextRange(ts.createLiteral(text), node);
+        }
+        /**
+         * Visits a TemplateExpression node.
+         *
+         * @param node A TemplateExpression node.
+         */
+        function visitTemplateExpression(node) {
+            var expressions = [];
+            addTemplateHead(expressions, node);
+            addTemplateSpans(expressions, node);
+            // createAdd will check if each expression binds less closely than binary '+'.
+            // If it does, it wraps the expression in parentheses. Otherwise, something like
+            //    `abc${ 1 << 2 }`
+            // becomes
+            //    "abc" + 1 << 2 + ""
+            // which is really
+            //    ("abc" + 1) << (2 + "")
+            // rather than
+            //    "abc" + (1 << 2) + ""
+            var expression = ts.reduceLeft(expressions, ts.createAdd);
+            if (ts.nodeIsSynthesized(expression)) {
+                expression.pos = node.pos;
+                expression.end = node.end;
+            }
+            return expression;
+        }
+        /**
+         * Gets a value indicating whether we need to include the head of a TemplateExpression.
+         *
+         * @param node A TemplateExpression node.
+         */
+        function shouldAddTemplateHead(node) {
+            // If this expression has an empty head literal and the first template span has a non-empty
+            // literal, then emitting the empty head literal is not necessary.
+            //     `${ foo } and ${ bar }`
+            // can be emitted as
+            //     foo + " and " + bar
+            // This is because it is only required that one of the first two operands in the emit
+            // output must be a string literal, so that the other operand and all following operands
+            // are forced into strings.
+            //
+            // If the first template span has an empty literal, then the head must still be emitted.
+            //     `${ foo }${ bar }`
+            // must still be emitted as
+            //     "" + foo + bar
+            // There is always atleast one templateSpan in this code path, since
+            // NoSubstitutionTemplateLiterals are directly emitted via emitLiteral()
+            ts.Debug.assert(node.templateSpans.length !== 0);
+            return node.head.text.length !== 0 || node.templateSpans[0].literal.text.length === 0;
+        }
+        /**
+         * Adds the head of a TemplateExpression to an array of expressions.
+         *
+         * @param expressions An array of expressions.
+         * @param node A TemplateExpression node.
+         */
+        function addTemplateHead(expressions, node) {
+            if (!shouldAddTemplateHead(node)) {
+                return;
+            }
+            expressions.push(ts.createLiteral(node.head.text));
+        }
+        /**
+         * Visits and adds the template spans of a TemplateExpression to an array of expressions.
+         *
+         * @param expressions An array of expressions.
+         * @param node A TemplateExpression node.
+         */
+        function addTemplateSpans(expressions, node) {
+            for (var _i = 0, _a = node.templateSpans; _i < _a.length; _i++) {
+                var span = _a[_i];
+                expressions.push(ts.visitNode(span.expression, visitor, ts.isExpression));
+                // Only emit if the literal is non-empty.
+                // The binary '+' operator is left-associative, so the first string concatenation
+                // with the head will force the result up to this point to be a string.
+                // Emitting a '+ ""' has no semantic effect for middles and tails.
+                if (span.literal.text.length !== 0) {
+                    expressions.push(ts.createLiteral(span.literal.text));
+                }
+            }
+        }
+        /**
+         * Visits the `super` keyword
+         */
+        function visitSuperKeyword(isExpressionOfCall) {
+            return hierarchyFacts & 8 /* NonStaticClassElement */
+                && !isExpressionOfCall
+                ? ts.createPropertyAccess(ts.createFileLevelUniqueName("_super"), "prototype")
+                : ts.createFileLevelUniqueName("_super");
+        }
+        function visitMetaProperty(node) {
+            if (node.keywordToken === 94 /* NewKeyword */ && node.name.escapedText === "target") {
+                if (hierarchyFacts & 8192 /* ComputedPropertyName */) {
+                    hierarchyFacts |= 32768 /* NewTargetInComputedPropertyName */;
+                }
+                else {
+                    hierarchyFacts |= 16384 /* NewTarget */;
+                }
+                return ts.createFileLevelUniqueName("_newTarget");
+            }
+            return node;
+        }
+        /**
+         * Called by the printer just before a node is printed.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to be printed.
+         * @param emitCallback The callback used to emit the node.
+         */
+        function onEmitNode(hint, node, emitCallback) {
+            if (enabledSubstitutions & 1 /* CapturedThis */ && ts.isFunctionLike(node)) {
+                // If we are tracking a captured `this`, keep track of the enclosing function.
+                var ancestorFacts = enterSubtree(16286 /* FunctionExcludes */, ts.getEmitFlags(node) & 8 /* CapturesThis */
+                    ? 65 /* FunctionIncludes */ | 16 /* CapturesThis */
+                    : 65 /* FunctionIncludes */);
+                previousOnEmitNode(hint, node, emitCallback);
+                exitSubtree(ancestorFacts, 0 /* None */, 0 /* None */);
+                return;
+            }
+            previousOnEmitNode(hint, node, emitCallback);
+        }
+        /**
+         * Enables a more costly code path for substitutions when we determine a source file
+         * contains block-scoped bindings (e.g. `let` or `const`).
+         */
+        function enableSubstitutionsForBlockScopedBindings() {
+            if ((enabledSubstitutions & 2 /* BlockScopedBindings */) === 0) {
+                enabledSubstitutions |= 2 /* BlockScopedBindings */;
+                context.enableSubstitution(71 /* Identifier */);
+            }
+        }
+        /**
+         * Enables a more costly code path for substitutions when we determine a source file
+         * contains a captured `this`.
+         */
+        function enableSubstitutionsForCapturedThis() {
+            if ((enabledSubstitutions & 1 /* CapturedThis */) === 0) {
+                enabledSubstitutions |= 1 /* CapturedThis */;
+                context.enableSubstitution(99 /* ThisKeyword */);
+                context.enableEmitNotification(155 /* Constructor */);
+                context.enableEmitNotification(154 /* MethodDeclaration */);
+                context.enableEmitNotification(156 /* GetAccessor */);
+                context.enableEmitNotification(157 /* SetAccessor */);
+                context.enableEmitNotification(193 /* ArrowFunction */);
+                context.enableEmitNotification(192 /* FunctionExpression */);
+                context.enableEmitNotification(234 /* FunctionDeclaration */);
+            }
+        }
+        /**
+         * Hooks node substitutions.
+         *
+         * @param hint The context for the emitter.
+         * @param node The node to substitute.
+         */
+        function onSubstituteNode(hint, node) {
+            node = previousOnSubstituteNode(hint, node);
+            if (hint === 1 /* Expression */) {
+                return substituteExpression(node);
+            }
+            if (ts.isIdentifier(node)) {
+                return substituteIdentifier(node);
+            }
+            return node;
+        }
+        /**
+         * Hooks substitutions for non-expression identifiers.
+         */
+        function substituteIdentifier(node) {
+            // Only substitute the identifier if we have enabled substitutions for block-scoped
+            // bindings.
+            if (enabledSubstitutions & 2 /* BlockScopedBindings */ && !ts.isInternalName(node)) {
+                var original = ts.getParseTreeNode(node, ts.isIdentifier);
+                if (original && isNameOfDeclarationWithCollidingName(original)) {
+                    return ts.setTextRange(ts.getGeneratedNameForNode(original), node);
+                }
+            }
+            return node;
+        }
+        /**
+         * Determines whether a name is the name of a declaration with a colliding name.
+         * NOTE: This function expects to be called with an original source tree node.
+         *
+         * @param node An original source tree node.
+         */
+        function isNameOfDeclarationWithCollidingName(node) {
+            switch (node.parent.kind) {
+                case 182 /* BindingElement */:
+                case 235 /* ClassDeclaration */:
+                case 238 /* EnumDeclaration */:
+                case 232 /* VariableDeclaration */:
+                    return node.parent.name === node
+                        && resolver.isDeclarationWithCollidingName(node.parent);
+            }
+            return false;
+        }
+        /**
+         * Substitutes an expression.
+         *
+         * @param node An Expression node.
+         */
+        function substituteExpression(node) {
+            switch (node.kind) {
+                case 71 /* Identifier */:
+                    return substituteExpressionIdentifier(node);
+                case 99 /* ThisKeyword */:
+                    return substituteThisKeyword(node);
+            }
+            return node;
+        }
+        /**
+         * Substitutes an expression identifier.
+         *
+         * @param node An Identifier node.
+         */
+        function substituteExpressionIdentifier(node) {
+            if (enabledSubstitutions & 2 /* BlockScopedBindings */ && !ts.isInternalName(node)) {
+                var declaration = resolver.getReferencedDeclarationWithCollidingName(node);
+                if (declaration && !(ts.isClassLike(declaration) && isPartOfClassBody(declaration, node))) {
+                    return ts.setTextRange(ts.getGeneratedNameForNode(ts.getNameOfDeclaration(declaration)), node);
+                }
+            }
+            return node;
+        }
+        function isPartOfClassBody(declaration, node) {
+            var currentNode = ts.getParseTreeNode(node);
+            if (!currentNode || currentNode === declaration || currentNode.end <= declaration.pos || currentNode.pos >= declaration.end) {
+                // if the node has no correlation to a parse tree node, its definitely not
+                // part of the body.
+                // if the node is outside of the document range of the declaration, its
+                // definitely not part of the body.
+                return false;
+            }
+            var blockScope = ts.getEnclosingBlockScopeContainer(declaration);
+            while (currentNode) {
+                if (currentNode === blockScope || currentNode === declaration) {
+                    // if we are in the enclosing block scope of the declaration, we are definitely
+                    // not inside the class body.
+                    return false;
+                }
+                if (ts.isClassElement(currentNode) && currentNode.parent === declaration) {
+                    return true;
+                }
+                currentNode = currentNode.parent;
+            }
+            return false;
+        }
+        /**
+         * Substitutes `this` when contained within an arrow function.
+         *
+         * @param node The ThisKeyword node.
+         */
+        function substituteThisKeyword(node) {
+            if (enabledSubstitutions & 1 /* CapturedThis */
+                && hierarchyFacts & 16 /* CapturesThis */) {
+                return ts.setTextRange(ts.createFileLevelUniqueName("_this"), node);
+            }
+            return node;
+        }
+        function getClassMemberPrefix(node, member) {
+            return ts.hasModifier(member, 32 /* Static */)
+                ? ts.getInternalName(node)
+                : ts.createPropertyAccess(ts.getInternalName(node), "prototype");
+        }
+        function hasSynthesizedDefaultSuperCall(constructor, hasExtendsClause) {
+            if (!constructor || !hasExtendsClause) {
+                return false;
+            }
+            if (ts.some(constructor.parameters)) {
+                return false;
+            }
+            var statement = ts.firstOrUndefined(constructor.body.statements);
+            if (!statement || !ts.nodeIsSynthesized(statement) || statement.kind !== 216 /* ExpressionStatement */) {
+                return false;
+            }
+            var statementExpression = statement.expression;
+            if (!ts.nodeIsSynthesized(statementExpression) || statementExpression.kind !== 187 /* CallExpression */) {
+                return false;
+            }
+            var callTarget = statementExpression.expression;
+            if (!ts.nodeIsSynthesized(callTarget) || callTarget.kind !== 97 /* SuperKeyword */) {
+                return false;
+            }
+            var callArgument = ts.singleOrUndefined(statementExpression.arguments);
+            if (!callArgument || !ts.nodeIsSynthesized(callArgument) || callArgument.kind !== 204 /* SpreadElement */) {
+                return false;
+            }
+            var expression = callArgument.expression;
+            return ts.isIdentifier(expression) && expression.escapedText === "arguments";
+        }
+    }
+    ts.transformES2015 = transformES2015;
+    function createExtendsHelper(context, name) {
+        context.requestEmitHelper(extendsHelper);
+        return ts.createCall(ts.getHelperName("__extends"), 
+        /*typeArguments*/ undefined, [
+            name,
+            ts.createFileLevelUniqueName("_super")
+        ]);
+    }
+    function createTemplateObjectHelper(context, cooked, raw) {
+        context.requestEmitHelper(templateObjectHelper);
+        return ts.createCall(ts.getHelperName("__makeTemplateObject"), 
+        /*typeArguments*/ undefined, [
+            cooked,
+            raw
+        ]);
+    }
+    var extendsHelper = {
+        name: "typescript:extends",
+        scoped: false,
+        priority: 0,
+        text: "\n            var __extends = (this && this.__extends) || (function () {\n                var extendStatics = Object.setPrototypeOf ||\n                    ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\n                    function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };\n                return function (d, b) {\n                    extendStatics(d, b);\n                    function __() { this.constructor = d; }\n                    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\n                };\n            })();"
+    };
+    var templateObjectHelper = {
+        name: "typescript:makeTemplateObject",
+        scoped: false,
+        priority: 0,
+        text: "\n            var __makeTemplateObject = (this && this.__makeTemplateObject) || function (cooked, raw) {\n                if (Object.defineProperty) { Object.defineProperty(cooked, \"raw\", { value: raw }); } else { cooked.raw = raw; }\n                return cooked;\n            };"
+    };
+})(ts || (ts = {}));
+/*@internal*/
+var ts;
+(function (ts) {
+    /**
+     * Transforms ES5 syntax into ES3 syntax.
+     *
+     * @param context Context and state information for the transformation.
+     */
+    function transformES5(context) {
+        var compilerOptions = context.getCompilerOptions();
+        // enable emit notification only if using --jsx preserve or react-native
+        var previousOnEmitNode;
+        var noSubstitution;
+        if (compilerOptions.jsx === 1 /* Preserve */ || compilerOptions.jsx === 3 /* ReactNative */) {
+            previousOnEmitNode = context.onEmitNode;
+            context.onEmitNode = onEmitNode;
+            context.enableEmitNotification(257 /* JsxOpeningElement */);
+            context.enableEmitNotification(258 /* JsxClosingElement */);
+            context.enableEmitNotification(256 /* JsxSelfClosingElement */);
+            noSubstitution = [];
+        }
+        var previousOnSubstituteNode = context.onSubstituteNode;
+        context.onSubstituteNode = onSubstituteNode;
+        context.enableSubstitution(185 /* PropertyAccessExpression */);
+        context.enableSubstitution(270 /* PropertyAssignment */);
+        return ts.chainBundle(transformSourceFile);
+        /**
+         * Transforms an ES5 source file to ES3.
+         *
+         * @param node A SourceFile
+         */
+        function transformSourceFile(node) {
+            return node;
+        }
+        /**
+         * Called by the printer just before a node is printed.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to emit.
+         * @param emitCallback A callback used to emit the node.
+         */
+        function onEmitNode(hint, node, emitCallback) {
+            switch (node.kind) {
+                case 257 /* JsxOpeningElement */:
+                case 258 /* JsxClosingElement */:
+                case 256 /* JsxSelfClosingElement */:
+                    var tagName = node.tagName;
+                    noSubstitution[ts.getOriginalNodeId(tagName)] = true;
+                    break;
+            }
+            previousOnEmitNode(hint, node, emitCallback);
+        }
+        /**
+         * Hooks node substitutions.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to substitute.
+         */
+        function onSubstituteNode(hint, node) {
+            if (node.id && noSubstitution && noSubstitution[node.id]) {
+                return previousOnSubstituteNode(hint, node);
+            }
+            node = previousOnSubstituteNode(hint, node);
+            if (ts.isPropertyAccessExpression(node)) {
+                return substitutePropertyAccessExpression(node);
+            }
+            else if (ts.isPropertyAssignment(node)) {
+                return substitutePropertyAssignment(node);
+            }
+            return node;
+        }
+        /**
+         * Substitutes a PropertyAccessExpression whose name is a reserved word.
+         *
+         * @param node A PropertyAccessExpression
+         */
+        function substitutePropertyAccessExpression(node) {
+            var literalName = trySubstituteReservedName(node.name);
+            if (literalName) {
+                return ts.setTextRange(ts.createElementAccess(node.expression, literalName), node);
+            }
+            return node;
+        }
+        /**
+         * Substitutes a PropertyAssignment whose name is a reserved word.
+         *
+         * @param node A PropertyAssignment
+         */
+        function substitutePropertyAssignment(node) {
+            var literalName = ts.isIdentifier(node.name) && trySubstituteReservedName(node.name);
+            if (literalName) {
+                return ts.updatePropertyAssignment(node, literalName, node.initializer);
+            }
+            return node;
+        }
+        /**
+         * If an identifier name is a reserved word, returns a string literal for the name.
+         *
+         * @param name An Identifier
+         */
+        function trySubstituteReservedName(name) {
+            var token = name.originalKeywordKind || (ts.nodeIsSynthesized(name) ? ts.stringToToken(ts.idText(name)) : undefined);
+            if (token !== undefined && token >= 72 /* FirstReservedWord */ && token <= 107 /* LastReservedWord */) {
+                return ts.setTextRange(ts.createLiteral(name), name);
+            }
+            return undefined;
+        }
+    }
+    ts.transformES5 = transformES5;
+})(ts || (ts = {}));
+// Transforms generator functions into a compatible ES5 representation with similar runtime
+// semantics. This is accomplished by first transforming the body of each generator
+// function into an intermediate representation that is the compiled into a JavaScript
+// switch statement.
+//
+// Many functions in this transformer will contain comments indicating the expected
+// intermediate representation. For illustrative purposes, the following intermediate
+// language is used to define this intermediate representation:
+//
+//  .nop                            - Performs no operation.
+//  .local NAME, ...                - Define local variable declarations.
+//  .mark LABEL                     - Mark the location of a label.
+//  .br LABEL                       - Jump to a label. If jumping out of a protected
+//                                    region, all .finally blocks are executed.
+//  .brtrue LABEL, (x)              - Jump to a label IIF the expression `x` is truthy.
+//                                    If jumping out of a protected region, all .finally
+//                                    blocks are executed.
+//  .brfalse LABEL, (x)             - Jump to a label IIF the expression `x` is falsey.
+//                                    If jumping out of a protected region, all .finally
+//                                    blocks are executed.
+//  .yield (x)                      - Yield the value of the optional expression `x`.
+//                                    Resume at the next label.
+//  .yieldstar (x)                  - Delegate yield to the value of the optional
+//                                    expression `x`. Resume at the next label.
+//                                    NOTE: `x` must be an Iterator, not an Iterable.
+//  .loop CONTINUE, BREAK           - Marks the beginning of a loop. Any "continue" or
+//                                    "break" abrupt completions jump to the CONTINUE or
+//                                    BREAK labels, respectively.
+//  .endloop                        - Marks the end of a loop.
+//  .with (x)                       - Marks the beginning of a WithStatement block, using
+//                                    the supplied expression.
+//  .endwith                        - Marks the end of a WithStatement.
+//  .switch                         - Marks the beginning of a SwitchStatement.
+//  .endswitch                      - Marks the end of a SwitchStatement.
+//  .labeled NAME                   - Marks the beginning of a LabeledStatement with the
+//                                    supplied name.
+//  .endlabeled                     - Marks the end of a LabeledStatement.
+//  .try TRY, CATCH, FINALLY, END   - Marks the beginning of a protected region, and the
+//                                    labels for each block.
+//  .catch (x)                      - Marks the beginning of a catch block.
+//  .finally                        - Marks the beginning of a finally block.
+//  .endfinally                     - Marks the end of a finally block.
+//  .endtry                         - Marks the end of a protected region.
+//  .throw (x)                      - Throws the value of the expression `x`.
+//  .return (x)                     - Returns the value of the expression `x`.
+//
+// In addition, the illustrative intermediate representation introduces some special
+// variables:
+//
+//  %sent%                          - Either returns the next value sent to the generator,
+//                                    returns the result of a delegated yield, or throws
+//                                    the exception sent to the generator.
+//  %error%                         - Returns the value of the current exception in a
+//                                    catch block.
+//
+// This intermediate representation is then compiled into JavaScript syntax. The resulting
+// compilation output looks something like the following:
+//
+//  function f() {
+//      var /*locals*/;
+//      /*functions*/
+//      return __generator(function (state) {
+//          switch (state.label) {
+//              /*cases per label*/
+//          }
+//      });
+//  }
+//
+// Each of the above instructions corresponds to JavaScript emit similar to the following:
+//
+//  .local NAME                   | var NAME;
+// -------------------------------|----------------------------------------------
+//  .mark LABEL                   | case LABEL:
+// -------------------------------|----------------------------------------------
+//  .br LABEL                     |     return [3 /*break*/, LABEL];
+// -------------------------------|----------------------------------------------
+//  .brtrue LABEL, (x)            |     if (x) return [3 /*break*/, LABEL];
+// -------------------------------|----------------------------------------------
+//  .brfalse LABEL, (x)           |     if (!(x)) return [3, /*break*/, LABEL];
+// -------------------------------|----------------------------------------------
+//  .yield (x)                    |     return [4 /*yield*/, x];
+//  .mark RESUME                  | case RESUME:
+//      a = %sent%;               |     a = state.sent();
+// -------------------------------|----------------------------------------------
+//  .yieldstar (x)                |     return [5 /*yield**/, x];
+//  .mark RESUME                  | case RESUME:
+//      a = %sent%;               |     a = state.sent();
+// -------------------------------|----------------------------------------------
+//  .with (_a)                    |     with (_a) {
+//      a();                      |         a();
+//                                |     }
+//                                |     state.label = LABEL;
+//  .mark LABEL                   | case LABEL:
+//                                |     with (_a) {
+//      b();                      |         b();
+//                                |     }
+//  .endwith                      |
+// -------------------------------|----------------------------------------------
+//                                | case 0:
+//                                |     state.trys = [];
+//                                | ...
+//  .try TRY, CATCH, FINALLY, END |
+//  .mark TRY                     | case TRY:
+//                                |     state.trys.push([TRY, CATCH, FINALLY, END]);
+//  .nop                          |
+//      a();                      |     a();
+//  .br END                       |     return [3 /*break*/, END];
+//  .catch (e)                    |
+//  .mark CATCH                   | case CATCH:
+//                                |     e = state.sent();
+//      b();                      |     b();
+//  .br END                       |     return [3 /*break*/, END];
+//  .finally                      |
+//  .mark FINALLY                 | case FINALLY:
+//      c();                      |     c();
+//  .endfinally                   |     return [7 /*endfinally*/];
+//  .endtry                       |
+//  .mark END                     | case END:
+/*@internal*/
+var ts;
+(function (ts) {
+    var OpCode;
+    (function (OpCode) {
+        OpCode[OpCode["Nop"] = 0] = "Nop";
+        OpCode[OpCode["Statement"] = 1] = "Statement";
+        OpCode[OpCode["Assign"] = 2] = "Assign";
+        OpCode[OpCode["Break"] = 3] = "Break";
+        OpCode[OpCode["BreakWhenTrue"] = 4] = "BreakWhenTrue";
+        OpCode[OpCode["BreakWhenFalse"] = 5] = "BreakWhenFalse";
+        OpCode[OpCode["Yield"] = 6] = "Yield";
+        OpCode[OpCode["YieldStar"] = 7] = "YieldStar";
+        OpCode[OpCode["Return"] = 8] = "Return";
+        OpCode[OpCode["Throw"] = 9] = "Throw";
+        OpCode[OpCode["Endfinally"] = 10] = "Endfinally"; // Marks the end of a `finally` block
+    })(OpCode || (OpCode = {}));
+    // whether a generated code block is opening or closing at the current operation for a FunctionBuilder
+    var BlockAction;
+    (function (BlockAction) {
+        BlockAction[BlockAction["Open"] = 0] = "Open";
+        BlockAction[BlockAction["Close"] = 1] = "Close";
+    })(BlockAction || (BlockAction = {}));
+    // the kind for a generated code block in a FunctionBuilder
+    var CodeBlockKind;
+    (function (CodeBlockKind) {
+        CodeBlockKind[CodeBlockKind["Exception"] = 0] = "Exception";
+        CodeBlockKind[CodeBlockKind["With"] = 1] = "With";
+        CodeBlockKind[CodeBlockKind["Switch"] = 2] = "Switch";
+        CodeBlockKind[CodeBlockKind["Loop"] = 3] = "Loop";
+        CodeBlockKind[CodeBlockKind["Labeled"] = 4] = "Labeled";
+    })(CodeBlockKind || (CodeBlockKind = {}));
+    // the state for a generated code exception block
+    var ExceptionBlockState;
+    (function (ExceptionBlockState) {
+        ExceptionBlockState[ExceptionBlockState["Try"] = 0] = "Try";
+        ExceptionBlockState[ExceptionBlockState["Catch"] = 1] = "Catch";
+        ExceptionBlockState[ExceptionBlockState["Finally"] = 2] = "Finally";
+        ExceptionBlockState[ExceptionBlockState["Done"] = 3] = "Done";
+    })(ExceptionBlockState || (ExceptionBlockState = {}));
+    // NOTE: changes to this enum should be reflected in the __generator helper.
+    var Instruction;
+    (function (Instruction) {
+        Instruction[Instruction["Next"] = 0] = "Next";
+        Instruction[Instruction["Throw"] = 1] = "Throw";
+        Instruction[Instruction["Return"] = 2] = "Return";
+        Instruction[Instruction["Break"] = 3] = "Break";
+        Instruction[Instruction["Yield"] = 4] = "Yield";
+        Instruction[Instruction["YieldStar"] = 5] = "YieldStar";
+        Instruction[Instruction["Catch"] = 6] = "Catch";
+        Instruction[Instruction["Endfinally"] = 7] = "Endfinally";
+    })(Instruction || (Instruction = {}));
+    function getInstructionName(instruction) {
+        switch (instruction) {
+            case 2 /* Return */: return "return";
+            case 3 /* Break */: return "break";
+            case 4 /* Yield */: return "yield";
+            case 5 /* YieldStar */: return "yield*";
+            case 7 /* Endfinally */: return "endfinally";
+            default: return undefined; // TODO: GH#18217
+        }
+    }
+    function transformGenerators(context) {
+        var resumeLexicalEnvironment = context.resumeLexicalEnvironment, endLexicalEnvironment = context.endLexicalEnvironment, hoistFunctionDeclaration = context.hoistFunctionDeclaration, hoistVariableDeclaration = context.hoistVariableDeclaration;
+        var compilerOptions = context.getCompilerOptions();
+        var languageVersion = ts.getEmitScriptTarget(compilerOptions);
+        var resolver = context.getEmitResolver();
+        var previousOnSubstituteNode = context.onSubstituteNode;
+        context.onSubstituteNode = onSubstituteNode;
+        var renamedCatchVariables;
+        var renamedCatchVariableDeclarations;
+        var inGeneratorFunctionBody;
+        var inStatementContainingYield;
+        // The following three arrays store information about generated code blocks.
+        // All three arrays are correlated by their index. This approach is used over allocating
+        // objects to store the same information to avoid GC overhead.
+        //
+        var blocks; // Information about the code block
+        var blockOffsets; // The operation offset at which a code block begins or ends
+        var blockActions; // Whether the code block is opened or closed
+        var blockStack; // A stack of currently open code blocks
+        // Labels are used to mark locations in the code that can be the target of a Break (jump)
+        // operation. These are translated into case clauses in a switch statement.
+        // The following two arrays are correlated by their index. This approach is used over
+        // allocating objects to store the same information to avoid GC overhead.
+        //
+        var labelOffsets; // The operation offset at which the label is defined.
+        var labelExpressions; // The NumericLiteral nodes bound to each label.
+        var nextLabelId = 1; // The next label id to use.
+        // Operations store information about generated code for the function body. This
+        // Includes things like statements, assignments, breaks (jumps), and yields.
+        // The following three arrays are correlated by their index. This approach is used over
+        // allocating objects to store the same information to avoid GC overhead.
+        //
+        var operations; // The operation to perform.
+        var operationArguments; // The arguments to the operation.
+        var operationLocations; // The source map location for the operation.
+        var state; // The name of the state object used by the generator at runtime.
+        // The following variables store information used by the `build` function:
+        //
+        var blockIndex = 0; // The index of the current block.
+        var labelNumber = 0; // The current label number.
+        var labelNumbers;
+        var lastOperationWasAbrupt; // Indicates whether the last operation was abrupt (break/continue).
+        var lastOperationWasCompletion; // Indicates whether the last operation was a completion (return/throw).
+        var clauses; // The case clauses generated for labels.
+        var statements; // The statements for the current label.
+        var exceptionBlockStack; // A stack of containing exception blocks.
+        var currentExceptionBlock; // The current exception block.
+        var withBlockStack; // A stack containing `with` blocks.
+        return ts.chainBundle(transformSourceFile);
+        function transformSourceFile(node) {
+            if (node.isDeclarationFile || (node.transformFlags & 512 /* ContainsGenerator */) === 0) {
+                return node;
+            }
+            var visited = ts.visitEachChild(node, visitor, context);
+            ts.addEmitHelpers(visited, context.readEmitHelpers());
+            return visited;
+        }
+        /**
+         * Visits a node.
+         *
+         * @param node The node to visit.
+         */
+        function visitor(node) {
+            var transformFlags = node.transformFlags;
+            if (inStatementContainingYield) {
+                return visitJavaScriptInStatementContainingYield(node);
+            }
+            else if (inGeneratorFunctionBody) {
+                return visitJavaScriptInGeneratorFunctionBody(node);
+            }
+            else if (transformFlags & 256 /* Generator */) {
+                return visitGenerator(node);
+            }
+            else if (transformFlags & 512 /* ContainsGenerator */) {
+                return ts.visitEachChild(node, visitor, context);
+            }
+            else {
+                return node;
+            }
+        }
+        /**
+         * Visits a node that is contained within a statement that contains yield.
+         *
+         * @param node The node to visit.
+         */
+        function visitJavaScriptInStatementContainingYield(node) {
+            switch (node.kind) {
+                case 218 /* DoStatement */:
+                    return visitDoStatement(node);
+                case 219 /* WhileStatement */:
+                    return visitWhileStatement(node);
+                case 227 /* SwitchStatement */:
+                    return visitSwitchStatement(node);
+                case 228 /* LabeledStatement */:
+                    return visitLabeledStatement(node);
+                default:
+                    return visitJavaScriptInGeneratorFunctionBody(node);
+            }
+        }
+        /**
+         * Visits a node that is contained within a generator function.
+         *
+         * @param node The node to visit.
+         */
+        function visitJavaScriptInGeneratorFunctionBody(node) {
+            switch (node.kind) {
+                case 234 /* FunctionDeclaration */:
+                    return visitFunctionDeclaration(node);
+                case 192 /* FunctionExpression */:
+                    return visitFunctionExpression(node);
+                case 156 /* GetAccessor */:
+                case 157 /* SetAccessor */:
+                    return visitAccessorDeclaration(node);
+                case 214 /* VariableStatement */:
+                    return visitVariableStatement(node);
+                case 220 /* ForStatement */:
+                    return visitForStatement(node);
+                case 221 /* ForInStatement */:
+                    return visitForInStatement(node);
+                case 224 /* BreakStatement */:
+                    return visitBreakStatement(node);
+                case 223 /* ContinueStatement */:
+                    return visitContinueStatement(node);
+                case 225 /* ReturnStatement */:
+                    return visitReturnStatement(node);
+                default:
+                    if (node.transformFlags & 16777216 /* ContainsYield */) {
+                        return visitJavaScriptContainingYield(node);
+                    }
+                    else if (node.transformFlags & (512 /* ContainsGenerator */ | 33554432 /* ContainsHoistedDeclarationOrCompletion */)) {
+                        return ts.visitEachChild(node, visitor, context);
+                    }
+                    else {
+                        return node;
+                    }
+            }
+        }
+        /**
+         * Visits a node that contains a YieldExpression.
+         *
+         * @param node The node to visit.
+         */
+        function visitJavaScriptContainingYield(node) {
+            switch (node.kind) {
+                case 200 /* BinaryExpression */:
+                    return visitBinaryExpression(node);
+                case 201 /* ConditionalExpression */:
+                    return visitConditionalExpression(node);
+                case 203 /* YieldExpression */:
+                    return visitYieldExpression(node);
+                case 183 /* ArrayLiteralExpression */:
+                    return visitArrayLiteralExpression(node);
+                case 184 /* ObjectLiteralExpression */:
+                    return visitObjectLiteralExpression(node);
+                case 186 /* ElementAccessExpression */:
+                    return visitElementAccessExpression(node);
+                case 187 /* CallExpression */:
+                    return visitCallExpression(node);
+                case 188 /* NewExpression */:
+                    return visitNewExpression(node);
+                default:
+                    return ts.visitEachChild(node, visitor, context);
+            }
+        }
+        /**
+         * Visits a generator function.
+         *
+         * @param node The node to visit.
+         */
+        function visitGenerator(node) {
+            switch (node.kind) {
+                case 234 /* FunctionDeclaration */:
+                    return visitFunctionDeclaration(node);
+                case 192 /* FunctionExpression */:
+                    return visitFunctionExpression(node);
+                default:
+                    return ts.Debug.failBadSyntaxKind(node);
+            }
+        }
+        /**
+         * Visits a function declaration.
+         *
+         * This will be called when one of the following conditions are met:
+         * - The function declaration is a generator function.
+         * - The function declaration is contained within the body of a generator function.
+         *
+         * @param node The node to visit.
+         */
+        function visitFunctionDeclaration(node) {
+            // Currently, we only support generators that were originally async functions.
+            if (node.asteriskToken) {
+                node = ts.setOriginalNode(ts.setTextRange(ts.createFunctionDeclaration(
+                /*decorators*/ undefined, node.modifiers, 
+                /*asteriskToken*/ undefined, node.name, 
+                /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
+                /*type*/ undefined, transformGeneratorFunctionBody(node.body)), 
+                /*location*/ node), node);
+            }
+            else {
+                var savedInGeneratorFunctionBody = inGeneratorFunctionBody;
+                var savedInStatementContainingYield = inStatementContainingYield;
+                inGeneratorFunctionBody = false;
+                inStatementContainingYield = false;
+                node = ts.visitEachChild(node, visitor, context);
+                inGeneratorFunctionBody = savedInGeneratorFunctionBody;
+                inStatementContainingYield = savedInStatementContainingYield;
+            }
+            if (inGeneratorFunctionBody) {
+                // Function declarations in a generator function body are hoisted
+                // to the top of the lexical scope and elided from the current statement.
+                hoistFunctionDeclaration(node);
+                return undefined;
+            }
+            else {
+                return node;
+            }
+        }
+        /**
+         * Visits a function expression.
+         *
+         * This will be called when one of the following conditions are met:
+         * - The function expression is a generator function.
+         * - The function expression is contained within the body of a generator function.
+         *
+         * @param node The node to visit.
+         */
+        function visitFunctionExpression(node) {
+            // Currently, we only support generators that were originally async functions.
+            if (node.asteriskToken) {
+                node = ts.setOriginalNode(ts.setTextRange(ts.createFunctionExpression(
+                /*modifiers*/ undefined, 
+                /*asteriskToken*/ undefined, node.name, 
+                /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
+                /*type*/ undefined, transformGeneratorFunctionBody(node.body)), 
+                /*location*/ node), node);
+            }
+            else {
+                var savedInGeneratorFunctionBody = inGeneratorFunctionBody;
+                var savedInStatementContainingYield = inStatementContainingYield;
+                inGeneratorFunctionBody = false;
+                inStatementContainingYield = false;
+                node = ts.visitEachChild(node, visitor, context);
+                inGeneratorFunctionBody = savedInGeneratorFunctionBody;
+                inStatementContainingYield = savedInStatementContainingYield;
+            }
+            return node;
+        }
+        /**
+         * Visits a get or set accessor declaration.
+         *
+         * This will be called when one of the following conditions are met:
+         * - The accessor is contained within the body of a generator function.
+         *
+         * @param node The node to visit.
+         */
+        function visitAccessorDeclaration(node) {
+            var savedInGeneratorFunctionBody = inGeneratorFunctionBody;
+            var savedInStatementContainingYield = inStatementContainingYield;
+            inGeneratorFunctionBody = false;
+            inStatementContainingYield = false;
+            node = ts.visitEachChild(node, visitor, context);
+            inGeneratorFunctionBody = savedInGeneratorFunctionBody;
+            inStatementContainingYield = savedInStatementContainingYield;
+            return node;
+        }
+        /**
+         * Transforms the body of a generator function declaration.
+         *
+         * @param node The function body to transform.
+         */
+        function transformGeneratorFunctionBody(body) {
+            // Save existing generator state
+            var statements = [];
+            var savedInGeneratorFunctionBody = inGeneratorFunctionBody;
+            var savedInStatementContainingYield = inStatementContainingYield;
+            var savedBlocks = blocks;
+            var savedBlockOffsets = blockOffsets;
+            var savedBlockActions = blockActions;
+            var savedBlockStack = blockStack;
+            var savedLabelOffsets = labelOffsets;
+            var savedLabelExpressions = labelExpressions;
+            var savedNextLabelId = nextLabelId;
+            var savedOperations = operations;
+            var savedOperationArguments = operationArguments;
+            var savedOperationLocations = operationLocations;
+            var savedState = state;
+            // Initialize generator state
+            inGeneratorFunctionBody = true;
+            inStatementContainingYield = false;
+            blocks = undefined;
+            blockOffsets = undefined;
+            blockActions = undefined;
+            blockStack = undefined;
+            labelOffsets = undefined;
+            labelExpressions = undefined;
+            nextLabelId = 1;
+            operations = undefined;
+            operationArguments = undefined;
+            operationLocations = undefined;
+            state = ts.createTempVariable(/*recordTempVariable*/ undefined);
+            // Build the generator
+            resumeLexicalEnvironment();
+            var statementOffset = ts.addPrologue(statements, body.statements, /*ensureUseStrict*/ false, visitor);
+            transformAndEmitStatements(body.statements, statementOffset);
+            var buildResult = build();
+            ts.prependStatements(statements, endLexicalEnvironment());
+            statements.push(ts.createReturn(buildResult));
+            // Restore previous generator state
+            inGeneratorFunctionBody = savedInGeneratorFunctionBody;
+            inStatementContainingYield = savedInStatementContainingYield;
+            blocks = savedBlocks;
+            blockOffsets = savedBlockOffsets;
+            blockActions = savedBlockActions;
+            blockStack = savedBlockStack;
+            labelOffsets = savedLabelOffsets;
+            labelExpressions = savedLabelExpressions;
+            nextLabelId = savedNextLabelId;
+            operations = savedOperations;
+            operationArguments = savedOperationArguments;
+            operationLocations = savedOperationLocations;
+            state = savedState;
+            return ts.setTextRange(ts.createBlock(statements, body.multiLine), body);
+        }
+        /**
+         * Visits a variable statement.
+         *
+         * This will be called when one of the following conditions are met:
+         * - The variable statement is contained within the body of a generator function.
+         *
+         * @param node The node to visit.
+         */
+        function visitVariableStatement(node) {
+            if (node.transformFlags & 16777216 /* ContainsYield */) {
+                transformAndEmitVariableDeclarationList(node.declarationList);
+                return undefined;
+            }
+            else {
+                // Do not hoist custom prologues.
+                if (ts.getEmitFlags(node) & 1048576 /* CustomPrologue */) {
+                    return node;
+                }
+                for (var _i = 0, _a = node.declarationList.declarations; _i < _a.length; _i++) {
+                    var variable = _a[_i];
+                    hoistVariableDeclaration(variable.name);
+                }
+                var variables = ts.getInitializedVariables(node.declarationList);
+                if (variables.length === 0) {
+                    return undefined;
+                }
+                return ts.setSourceMapRange(ts.createStatement(ts.inlineExpressions(ts.map(variables, transformInitializedVariable))), node);
+            }
+        }
+        /**
+         * Visits a binary expression.
+         *
+         * This will be called when one of the following conditions are met:
+         * - The node contains a YieldExpression.
+         *
+         * @param node The node to visit.
+         */
+        function visitBinaryExpression(node) {
+            var assoc = ts.getExpressionAssociativity(node);
+            switch (assoc) {
+                case 0 /* Left */:
+                    return visitLeftAssociativeBinaryExpression(node);
+                case 1 /* Right */:
+                    return visitRightAssociativeBinaryExpression(node);
+                default:
+                    return ts.Debug.assertNever(assoc);
+            }
+        }
+        function isCompoundAssignment(kind) {
+            return kind >= 59 /* FirstCompoundAssignment */
+                && kind <= 70 /* LastCompoundAssignment */;
+        }
+        function getOperatorForCompoundAssignment(kind) {
+            switch (kind) {
+                case 59 /* PlusEqualsToken */: return 37 /* PlusToken */;
+                case 60 /* MinusEqualsToken */: return 38 /* MinusToken */;
+                case 61 /* AsteriskEqualsToken */: return 39 /* AsteriskToken */;
+                case 62 /* AsteriskAsteriskEqualsToken */: return 40 /* AsteriskAsteriskToken */;
+                case 63 /* SlashEqualsToken */: return 41 /* SlashToken */;
+                case 64 /* PercentEqualsToken */: return 42 /* PercentToken */;
+                case 65 /* LessThanLessThanEqualsToken */: return 45 /* LessThanLessThanToken */;
+                case 66 /* GreaterThanGreaterThanEqualsToken */: return 46 /* GreaterThanGreaterThanToken */;
+                case 67 /* GreaterThanGreaterThanGreaterThanEqualsToken */: return 47 /* GreaterThanGreaterThanGreaterThanToken */;
+                case 68 /* AmpersandEqualsToken */: return 48 /* AmpersandToken */;
+                case 69 /* BarEqualsToken */: return 49 /* BarToken */;
+                case 70 /* CaretEqualsToken */: return 50 /* CaretToken */;
+            }
+        }
+        /**
+         * Visits a right-associative binary expression containing `yield`.
+         *
+         * @param node The node to visit.
+         */
+        function visitRightAssociativeBinaryExpression(node) {
+            var left = node.left, right = node.right;
+            if (containsYield(right)) {
+                var target = void 0;
+                switch (left.kind) {
+                    case 185 /* PropertyAccessExpression */:
+                        // [source]
+                        //      a.b = yield;
+                        //
+                        // [intermediate]
+                        //  .local _a
+                        //      _a = a;
+                        //  .yield resumeLabel
+                        //  .mark resumeLabel
+                        //      _a.b = %sent%;
+                        target = ts.updatePropertyAccess(left, cacheExpression(ts.visitNode(left.expression, visitor, ts.isLeftHandSideExpression)), left.name);
+                        break;
+                    case 186 /* ElementAccessExpression */:
+                        // [source]
+                        //      a[b] = yield;
+                        //
+                        // [intermediate]
+                        //  .local _a, _b
+                        //      _a = a;
+                        //      _b = b;
+                        //  .yield resumeLabel
+                        //  .mark resumeLabel
+                        //      _a[_b] = %sent%;
+                        target = ts.updateElementAccess(left, cacheExpression(ts.visitNode(left.expression, visitor, ts.isLeftHandSideExpression)), cacheExpression(ts.visitNode(left.argumentExpression, visitor, ts.isExpression)));
+                        break;
+                    default:
+                        target = ts.visitNode(left, visitor, ts.isExpression);
+                        break;
+                }
+                var operator = node.operatorToken.kind;
+                if (isCompoundAssignment(operator)) {
+                    return ts.setTextRange(ts.createAssignment(target, ts.setTextRange(ts.createBinary(cacheExpression(target), getOperatorForCompoundAssignment(operator), ts.visitNode(right, visitor, ts.isExpression)), node)), node);
+                }
+                else {
+                    return ts.updateBinary(node, target, ts.visitNode(right, visitor, ts.isExpression));
+                }
+            }
+            return ts.visitEachChild(node, visitor, context);
+        }
+        function visitLeftAssociativeBinaryExpression(node) {
+            if (containsYield(node.right)) {
+                if (ts.isLogicalOperator(node.operatorToken.kind)) {
+                    return visitLogicalBinaryExpression(node);
+                }
+                else if (node.operatorToken.kind === 26 /* CommaToken */) {
+                    return visitCommaExpression(node);
+                }
+                // [source]
+                //      a() + (yield) + c()
+                //
+                // [intermediate]
+                //  .local _a
+                //      _a = a();
+                //  .yield resumeLabel
+                //      _a + %sent% + c()
+                var clone_4 = ts.getMutableClone(node);
+                clone_4.left = cacheExpression(ts.visitNode(node.left, visitor, ts.isExpression));
+                clone_4.right = ts.visitNode(node.right, visitor, ts.isExpression);
+                return clone_4;
+            }
+            return ts.visitEachChild(node, visitor, context);
+        }
+        /**
+         * Visits a logical binary expression containing `yield`.
+         *
+         * @param node A node to visit.
+         */
+        function visitLogicalBinaryExpression(node) {
+            // Logical binary expressions (`&&` and `||`) are shortcutting expressions and need
+            // to be transformed as such:
+            //
+            // [source]
+            //      x = a() && yield;
+            //
+            // [intermediate]
+            //  .local _a
+            //      _a = a();
+            //  .brfalse resultLabel, (_a)
+            //  .yield resumeLabel
+            //  .mark resumeLabel
+            //      _a = %sent%;
+            //  .mark resultLabel
+            //      x = _a;
+            //
+            // [source]
+            //      x = a() || yield;
+            //
+            // [intermediate]
+            //  .local _a
+            //      _a = a();
+            //  .brtrue resultLabel, (_a)
+            //  .yield resumeLabel
+            //  .mark resumeLabel
+            //      _a = %sent%;
+            //  .mark resultLabel
+            //      x = _a;
+            var resultLabel = defineLabel();
+            var resultLocal = declareLocal();
+            emitAssignment(resultLocal, ts.visitNode(node.left, visitor, ts.isExpression), /*location*/ node.left);
+            if (node.operatorToken.kind === 53 /* AmpersandAmpersandToken */) {
+                // Logical `&&` shortcuts when the left-hand operand is falsey.
+                emitBreakWhenFalse(resultLabel, resultLocal, /*location*/ node.left);
+            }
+            else {
+                // Logical `||` shortcuts when the left-hand operand is truthy.
+                emitBreakWhenTrue(resultLabel, resultLocal, /*location*/ node.left);
+            }
+            emitAssignment(resultLocal, ts.visitNode(node.right, visitor, ts.isExpression), /*location*/ node.right);
+            markLabel(resultLabel);
+            return resultLocal;
+        }
+        /**
+         * Visits a comma expression containing `yield`.
+         *
+         * @param node The node to visit.
+         */
+        function visitCommaExpression(node) {
+            // [source]
+            //      x = a(), yield, b();
+            //
+            // [intermediate]
+            //      a();
+            //  .yield resumeLabel
+            //  .mark resumeLabel
+            //      x = %sent%, b();
+            var pendingExpressions = [];
+            visit(node.left);
+            visit(node.right);
+            return ts.inlineExpressions(pendingExpressions);
+            function visit(node) {
+                if (ts.isBinaryExpression(node) && node.operatorToken.kind === 26 /* CommaToken */) {
+                    visit(node.left);
+                    visit(node.right);
+                }
+                else {
+                    if (containsYield(node) && pendingExpressions.length > 0) {
+                        emitWorker(1 /* Statement */, [ts.createStatement(ts.inlineExpressions(pendingExpressions))]);
+                        pendingExpressions = [];
+                    }
+                    pendingExpressions.push(ts.visitNode(node, visitor, ts.isExpression));
+                }
+            }
+        }
+        /**
+         * Visits a conditional expression containing `yield`.
+         *
+         * @param node The node to visit.
+         */
+        function visitConditionalExpression(node) {
+            // [source]
+            //      x = a() ? yield : b();
+            //
+            // [intermediate]
+            //  .local _a
+            //  .brfalse whenFalseLabel, (a())
+            //  .yield resumeLabel
+            //  .mark resumeLabel
+            //      _a = %sent%;
+            //  .br resultLabel
+            //  .mark whenFalseLabel
+            //      _a = b();
+            //  .mark resultLabel
+            //      x = _a;
+            // We only need to perform a specific transformation if a `yield` expression exists
+            // in either the `whenTrue` or `whenFalse` branches.
+            // A `yield` in the condition will be handled by the normal visitor.
+            if (containsYield(node.whenTrue) || containsYield(node.whenFalse)) {
+                var whenFalseLabel = defineLabel();
+                var resultLabel = defineLabel();
+                var resultLocal = declareLocal();
+                emitBreakWhenFalse(whenFalseLabel, ts.visitNode(node.condition, visitor, ts.isExpression), /*location*/ node.condition);
+                emitAssignment(resultLocal, ts.visitNode(node.whenTrue, visitor, ts.isExpression), /*location*/ node.whenTrue);
+                emitBreak(resultLabel);
+                markLabel(whenFalseLabel);
+                emitAssignment(resultLocal, ts.visitNode(node.whenFalse, visitor, ts.isExpression), /*location*/ node.whenFalse);
+                markLabel(resultLabel);
+                return resultLocal;
+            }
+            return ts.visitEachChild(node, visitor, context);
+        }
+        /**
+         * Visits a `yield` expression.
+         *
+         * @param node The node to visit.
+         */
+        function visitYieldExpression(node) {
+            // [source]
+            //      x = yield a();
+            //
+            // [intermediate]
+            //  .yield resumeLabel, (a())
+            //  .mark resumeLabel
+            //      x = %sent%;
+            var resumeLabel = defineLabel();
+            var expression = ts.visitNode(node.expression, visitor, ts.isExpression);
+            if (node.asteriskToken) {
+                var iterator = (ts.getEmitFlags(node.expression) & 8388608 /* Iterator */) === 0
+                    ? ts.createValuesHelper(context, expression, /*location*/ node)
+                    : expression;
+                emitYieldStar(iterator, /*location*/ node);
+            }
+            else {
+                emitYield(expression, /*location*/ node);
+            }
+            markLabel(resumeLabel);
+            return createGeneratorResume(/*location*/ node);
+        }
+        /**
+         * Visits an ArrayLiteralExpression that contains a YieldExpression.
+         *
+         * @param node The node to visit.
+         */
+        function visitArrayLiteralExpression(node) {
+            return visitElements(node.elements, /*leadingElement*/ undefined, /*location*/ undefined, node.multiLine);
+        }
+        /**
+         * Visits an array of expressions containing one or more YieldExpression nodes
+         * and returns an expression for the resulting value.
+         *
+         * @param elements The elements to visit.
+         * @param multiLine Whether array literals created should be emitted on multiple lines.
+         */
+        function visitElements(elements, leadingElement, location, multiLine) {
+            // [source]
+            //      ar = [1, yield, 2];
+            //
+            // [intermediate]
+            //  .local _a
+            //      _a = [1];
+            //  .yield resumeLabel
+            //  .mark resumeLabel
+            //      ar = _a.concat([%sent%, 2]);
+            var numInitialElements = countInitialNodesWithoutYield(elements);
+            var temp;
+            if (numInitialElements > 0) {
+                temp = declareLocal();
+                var initialElements = ts.visitNodes(elements, visitor, ts.isExpression, 0, numInitialElements);
+                emitAssignment(temp, ts.createArrayLiteral(leadingElement
+                    ? [leadingElement].concat(initialElements) : initialElements));
+                leadingElement = undefined;
+            }
+            var expressions = ts.reduceLeft(elements, reduceElement, [], numInitialElements);
+            return temp
+                ? ts.createArrayConcat(temp, [ts.createArrayLiteral(expressions, multiLine)])
+                : ts.setTextRange(ts.createArrayLiteral(leadingElement ? [leadingElement].concat(expressions) : expressions, multiLine), location);
+            function reduceElement(expressions, element) {
+                if (containsYield(element) && expressions.length > 0) {
+                    var hasAssignedTemp = temp !== undefined;
+                    if (!temp) {
+                        temp = declareLocal();
+                    }
+                    emitAssignment(temp, hasAssignedTemp
+                        ? ts.createArrayConcat(temp, [ts.createArrayLiteral(expressions, multiLine)])
+                        : ts.createArrayLiteral(leadingElement ? [leadingElement].concat(expressions) : expressions, multiLine));
+                    leadingElement = undefined;
+                    expressions = [];
+                }
+                expressions.push(ts.visitNode(element, visitor, ts.isExpression));
+                return expressions;
+            }
+        }
+        function visitObjectLiteralExpression(node) {
+            // [source]
+            //      o = {
+            //          a: 1,
+            //          b: yield,
+            //          c: 2
+            //      };
+            //
+            // [intermediate]
+            //  .local _a
+            //      _a = {
+            //          a: 1
+            //      };
+            //  .yield resumeLabel
+            //  .mark resumeLabel
+            //      o = (_a.b = %sent%,
+            //          _a.c = 2,
+            //          _a);
+            var properties = node.properties;
+            var multiLine = node.multiLine;
+            var numInitialProperties = countInitialNodesWithoutYield(properties);
+            var temp = declareLocal();
+            emitAssignment(temp, ts.createObjectLiteral(ts.visitNodes(properties, visitor, ts.isObjectLiteralElementLike, 0, numInitialProperties), multiLine));
+            var expressions = ts.reduceLeft(properties, reduceProperty, [], numInitialProperties);
+            expressions.push(multiLine ? ts.startOnNewLine(ts.getMutableClone(temp)) : temp);
+            return ts.inlineExpressions(expressions);
+            function reduceProperty(expressions, property) {
+                if (containsYield(property) && expressions.length > 0) {
+                    emitStatement(ts.createStatement(ts.inlineExpressions(expressions)));
+                    expressions = [];
+                }
+                var expression = ts.createExpressionForObjectLiteralElementLike(node, property, temp);
+                var visited = ts.visitNode(expression, visitor, ts.isExpression);
+                if (visited) {
+                    if (multiLine) {
+                        ts.startOnNewLine(visited);
+                    }
+                    expressions.push(visited);
+                }
+                return expressions;
+            }
+        }
+        /**
+         * Visits an ElementAccessExpression that contains a YieldExpression.
+         *
+         * @param node The node to visit.
+         */
+        function visitElementAccessExpression(node) {
+            if (containsYield(node.argumentExpression)) {
+                // [source]
+                //      a = x[yield];
+                //
+                // [intermediate]
+                //  .local _a
+                //      _a = x;
+                //  .yield resumeLabel
+                //  .mark resumeLabel
+                //      a = _a[%sent%]
+                var clone_5 = ts.getMutableClone(node);
+                clone_5.expression = cacheExpression(ts.visitNode(node.expression, visitor, ts.isLeftHandSideExpression));
+                clone_5.argumentExpression = ts.visitNode(node.argumentExpression, visitor, ts.isExpression);
+                return clone_5;
+            }
+            return ts.visitEachChild(node, visitor, context);
+        }
+        function visitCallExpression(node) {
+            if (!ts.isImportCall(node) && ts.forEach(node.arguments, containsYield)) {
+                // [source]
+                //      a.b(1, yield, 2);
+                //
+                // [intermediate]
+                //  .local _a, _b, _c
+                //      _b = (_a = a).b;
+                //      _c = [1];
+                //  .yield resumeLabel
+                //  .mark resumeLabel
+                //      _b.apply(_a, _c.concat([%sent%, 2]));
+                var _a = ts.createCallBinding(node.expression, hoistVariableDeclaration, languageVersion, /*cacheIdentifiers*/ true), target = _a.target, thisArg = _a.thisArg;
+                return ts.setOriginalNode(ts.createFunctionApply(cacheExpression(ts.visitNode(target, visitor, ts.isLeftHandSideExpression)), thisArg, visitElements(node.arguments), 
+                /*location*/ node), node);
+            }
+            return ts.visitEachChild(node, visitor, context);
+        }
+        function visitNewExpression(node) {
+            if (ts.forEach(node.arguments, containsYield)) {
+                // [source]
+                //      new a.b(1, yield, 2);
+                //
+                // [intermediate]
+                //  .local _a, _b, _c
+                //      _b = (_a = a.b).bind;
+                //      _c = [1];
+                //  .yield resumeLabel
+                //  .mark resumeLabel
+                //      new (_b.apply(_a, _c.concat([%sent%, 2])));
+                var _a = ts.createCallBinding(ts.createPropertyAccess(node.expression, "bind"), hoistVariableDeclaration), target = _a.target, thisArg = _a.thisArg;
+                return ts.setOriginalNode(ts.setTextRange(ts.createNew(ts.createFunctionApply(cacheExpression(ts.visitNode(target, visitor, ts.isExpression)), thisArg, visitElements(node.arguments, 
+                /*leadingElement*/ ts.createVoidZero())), 
+                /*typeArguments*/ undefined, []), node), node);
+            }
+            return ts.visitEachChild(node, visitor, context);
+        }
+        function transformAndEmitStatements(statements, start) {
+            if (start === void 0) { start = 0; }
+            var numStatements = statements.length;
+            for (var i = start; i < numStatements; i++) {
+                transformAndEmitStatement(statements[i]);
+            }
+        }
+        function transformAndEmitEmbeddedStatement(node) {
+            if (ts.isBlock(node)) {
+                transformAndEmitStatements(node.statements);
+            }
+            else {
+                transformAndEmitStatement(node);
+            }
+        }
+        function transformAndEmitStatement(node) {
+            var savedInStatementContainingYield = inStatementContainingYield;
+            if (!inStatementContainingYield) {
+                inStatementContainingYield = containsYield(node);
+            }
+            transformAndEmitStatementWorker(node);
+            inStatementContainingYield = savedInStatementContainingYield;
+        }
+        function transformAndEmitStatementWorker(node) {
+            switch (node.kind) {
+                case 213 /* Block */:
+                    return transformAndEmitBlock(node);
+                case 216 /* ExpressionStatement */:
+                    return transformAndEmitExpressionStatement(node);
+                case 217 /* IfStatement */:
+                    return transformAndEmitIfStatement(node);
+                case 218 /* DoStatement */:
+                    return transformAndEmitDoStatement(node);
+                case 219 /* WhileStatement */:
+                    return transformAndEmitWhileStatement(node);
+                case 220 /* ForStatement */:
+                    return transformAndEmitForStatement(node);
+                case 221 /* ForInStatement */:
+                    return transformAndEmitForInStatement(node);
+                case 223 /* ContinueStatement */:
+                    return transformAndEmitContinueStatement(node);
+                case 224 /* BreakStatement */:
+                    return transformAndEmitBreakStatement(node);
+                case 225 /* ReturnStatement */:
+                    return transformAndEmitReturnStatement(node);
+                case 226 /* WithStatement */:
+                    return transformAndEmitWithStatement(node);
+                case 227 /* SwitchStatement */:
+                    return transformAndEmitSwitchStatement(node);
+                case 228 /* LabeledStatement */:
+                    return transformAndEmitLabeledStatement(node);
+                case 229 /* ThrowStatement */:
+                    return transformAndEmitThrowStatement(node);
+                case 230 /* TryStatement */:
+                    return transformAndEmitTryStatement(node);
+                default:
+                    return emitStatement(ts.visitNode(node, visitor, ts.isStatement));
+            }
+        }
+        function transformAndEmitBlock(node) {
+            if (containsYield(node)) {
+                transformAndEmitStatements(node.statements);
+            }
+            else {
+                emitStatement(ts.visitNode(node, visitor, ts.isStatement));
+            }
+        }
+        function transformAndEmitExpressionStatement(node) {
+            emitStatement(ts.visitNode(node, visitor, ts.isStatement));
+        }
+        function transformAndEmitVariableDeclarationList(node) {
+            for (var _i = 0, _a = node.declarations; _i < _a.length; _i++) {
+                var variable = _a[_i];
+                var name = ts.getSynthesizedClone(variable.name);
+                ts.setCommentRange(name, variable.name);
+                hoistVariableDeclaration(name);
+            }
+            var variables = ts.getInitializedVariables(node);
+            var numVariables = variables.length;
+            var variablesWritten = 0;
+            var pendingExpressions = [];
+            while (variablesWritten < numVariables) {
+                for (var i = variablesWritten; i < numVariables; i++) {
+                    var variable = variables[i];
+                    if (containsYield(variable.initializer) && pendingExpressions.length > 0) {
+                        break;
+                    }
+                    pendingExpressions.push(transformInitializedVariable(variable));
+                }
+                if (pendingExpressions.length) {
+                    emitStatement(ts.createStatement(ts.inlineExpressions(pendingExpressions)));
+                    variablesWritten += pendingExpressions.length;
+                    pendingExpressions = [];
+                }
+            }
+            return undefined;
+        }
+        function transformInitializedVariable(node) {
+            return ts.setSourceMapRange(ts.createAssignment(ts.setSourceMapRange(ts.getSynthesizedClone(node.name), node.name), ts.visitNode(node.initializer, visitor, ts.isExpression)), node);
+        }
+        function transformAndEmitIfStatement(node) {
+            if (containsYield(node)) {
+                // [source]
+                //      if (x)
+                //          /*thenStatement*/
+                //      else
+                //          /*elseStatement*/
+                //
+                // [intermediate]
+                //  .brfalse elseLabel, (x)
+                //      /*thenStatement*/
+                //  .br endLabel
+                //  .mark elseLabel
+                //      /*elseStatement*/
+                //  .mark endLabel
+                if (containsYield(node.thenStatement) || containsYield(node.elseStatement)) {
+                    var endLabel = defineLabel();
+                    var elseLabel = node.elseStatement ? defineLabel() : undefined;
+                    emitBreakWhenFalse(node.elseStatement ? elseLabel : endLabel, ts.visitNode(node.expression, visitor, ts.isExpression), /*location*/ node.expression);
+                    transformAndEmitEmbeddedStatement(node.thenStatement);
+                    if (node.elseStatement) {
+                        emitBreak(endLabel);
+                        markLabel(elseLabel);
+                        transformAndEmitEmbeddedStatement(node.elseStatement);
+                    }
+                    markLabel(endLabel);
+                }
+                else {
+                    emitStatement(ts.visitNode(node, visitor, ts.isStatement));
+                }
+            }
+            else {
+                emitStatement(ts.visitNode(node, visitor, ts.isStatement));
+            }
+        }
+        function transformAndEmitDoStatement(node) {
+            if (containsYield(node)) {
+                // [source]
+                //      do {
+                //          /*body*/
+                //      }
+                //      while (i < 10);
+                //
+                // [intermediate]
+                //  .loop conditionLabel, endLabel
+                //  .mark loopLabel
+                //      /*body*/
+                //  .mark conditionLabel
+                //  .brtrue loopLabel, (i < 10)
+                //  .endloop
+                //  .mark endLabel
+                var conditionLabel = defineLabel();
+                var loopLabel = defineLabel();
+                beginLoopBlock(/*continueLabel*/ conditionLabel);
+                markLabel(loopLabel);
+                transformAndEmitEmbeddedStatement(node.statement);
+                markLabel(conditionLabel);
+                emitBreakWhenTrue(loopLabel, ts.visitNode(node.expression, visitor, ts.isExpression));
+                endLoopBlock();
+            }
+            else {
+                emitStatement(ts.visitNode(node, visitor, ts.isStatement));
+            }
+        }
+        function visitDoStatement(node) {
+            if (inStatementContainingYield) {
+                beginScriptLoopBlock();
+                node = ts.visitEachChild(node, visitor, context);
+                endLoopBlock();
+                return node;
+            }
+            else {
+                return ts.visitEachChild(node, visitor, context);
+            }
+        }
+        function transformAndEmitWhileStatement(node) {
+            if (containsYield(node)) {
+                // [source]
+                //      while (i < 10) {
+                //          /*body*/
+                //      }
+                //
+                // [intermediate]
+                //  .loop loopLabel, endLabel
+                //  .mark loopLabel
+                //  .brfalse endLabel, (i < 10)
+                //      /*body*/
+                //  .br loopLabel
+                //  .endloop
+                //  .mark endLabel
+                var loopLabel = defineLabel();
+                var endLabel = beginLoopBlock(loopLabel);
+                markLabel(loopLabel);
+                emitBreakWhenFalse(endLabel, ts.visitNode(node.expression, visitor, ts.isExpression));
+                transformAndEmitEmbeddedStatement(node.statement);
+                emitBreak(loopLabel);
+                endLoopBlock();
+            }
+            else {
+                emitStatement(ts.visitNode(node, visitor, ts.isStatement));
+            }
+        }
+        function visitWhileStatement(node) {
+            if (inStatementContainingYield) {
+                beginScriptLoopBlock();
+                node = ts.visitEachChild(node, visitor, context);
+                endLoopBlock();
+                return node;
+            }
+            else {
+                return ts.visitEachChild(node, visitor, context);
+            }
+        }
+        function transformAndEmitForStatement(node) {
+            if (containsYield(node)) {
+                // [source]
+                //      for (var i = 0; i < 10; i++) {
+                //          /*body*/
+                //      }
+                //
+                // [intermediate]
+                //  .local i
+                //      i = 0;
+                //  .loop incrementLabel, endLoopLabel
+                //  .mark conditionLabel
+                //  .brfalse endLoopLabel, (i < 10)
+                //      /*body*/
+                //  .mark incrementLabel
+                //      i++;
+                //  .br conditionLabel
+                //  .endloop
+                //  .mark endLoopLabel
+                var conditionLabel = defineLabel();
+                var incrementLabel = defineLabel();
+                var endLabel = beginLoopBlock(incrementLabel);
+                if (node.initializer) {
+                    var initializer = node.initializer;
+                    if (ts.isVariableDeclarationList(initializer)) {
+                        transformAndEmitVariableDeclarationList(initializer);
+                    }
+                    else {
+                        emitStatement(ts.setTextRange(ts.createStatement(ts.visitNode(initializer, visitor, ts.isExpression)), initializer));
+                    }
+                }
+                markLabel(conditionLabel);
+                if (node.condition) {
+                    emitBreakWhenFalse(endLabel, ts.visitNode(node.condition, visitor, ts.isExpression));
+                }
+                transformAndEmitEmbeddedStatement(node.statement);
+                markLabel(incrementLabel);
+                if (node.incrementor) {
+                    emitStatement(ts.setTextRange(ts.createStatement(ts.visitNode(node.incrementor, visitor, ts.isExpression)), node.incrementor));
+                }
+                emitBreak(conditionLabel);
+                endLoopBlock();
+            }
+            else {
+                emitStatement(ts.visitNode(node, visitor, ts.isStatement));
+            }
+        }
+        function visitForStatement(node) {
+            if (inStatementContainingYield) {
+                beginScriptLoopBlock();
+            }
+            var initializer = node.initializer;
+            if (initializer && ts.isVariableDeclarationList(initializer)) {
+                for (var _i = 0, _a = initializer.declarations; _i < _a.length; _i++) {
+                    var variable = _a[_i];
+                    hoistVariableDeclaration(variable.name);
+                }
+                var variables = ts.getInitializedVariables(initializer);
+                node = ts.updateFor(node, variables.length > 0
+                    ? ts.inlineExpressions(ts.map(variables, transformInitializedVariable))
+                    : undefined, ts.visitNode(node.condition, visitor, ts.isExpression), ts.visitNode(node.incrementor, visitor, ts.isExpression), ts.visitNode(node.statement, visitor, ts.isStatement, ts.liftToBlock));
+            }
+            else {
+                node = ts.visitEachChild(node, visitor, context);
+            }
+            if (inStatementContainingYield) {
+                endLoopBlock();
+            }
+            return node;
+        }
+        function transformAndEmitForInStatement(node) {
+            // TODO(rbuckton): Source map locations
+            if (containsYield(node)) {
+                // [source]
+                //      for (var p in o) {
+                //          /*body*/
+                //      }
+                //
+                // [intermediate]
+                //  .local _a, _b, _i
+                //      _a = [];
+                //      for (_b in o) _a.push(_b);
+                //      _i = 0;
+                //  .loop incrementLabel, endLoopLabel
+                //  .mark conditionLabel
+                //  .brfalse endLoopLabel, (_i < _a.length)
+                //      p = _a[_i];
+                //      /*body*/
+                //  .mark incrementLabel
+                //      _b++;
+                //  .br conditionLabel
+                //  .endloop
+                //  .mark endLoopLabel
+                var keysArray = declareLocal(); // _a
+                var key = declareLocal(); // _b
+                var keysIndex = ts.createLoopVariable(); // _i
+                var initializer = node.initializer;
+                hoistVariableDeclaration(keysIndex);
+                emitAssignment(keysArray, ts.createArrayLiteral());
+                emitStatement(ts.createForIn(key, ts.visitNode(node.expression, visitor, ts.isExpression), ts.createStatement(ts.createCall(ts.createPropertyAccess(keysArray, "push"), 
+                /*typeArguments*/ undefined, [key]))));
+                emitAssignment(keysIndex, ts.createLiteral(0));
+                var conditionLabel = defineLabel();
+                var incrementLabel = defineLabel();
+                var endLabel = beginLoopBlock(incrementLabel);
+                markLabel(conditionLabel);
+                emitBreakWhenFalse(endLabel, ts.createLessThan(keysIndex, ts.createPropertyAccess(keysArray, "length")));
+                var variable = void 0;
+                if (ts.isVariableDeclarationList(initializer)) {
+                    for (var _i = 0, _a = initializer.declarations; _i < _a.length; _i++) {
+                        var variable_1 = _a[_i];
+                        hoistVariableDeclaration(variable_1.name);
+                    }
+                    variable = ts.getSynthesizedClone(initializer.declarations[0].name);
+                }
+                else {
+                    variable = ts.visitNode(initializer, visitor, ts.isExpression);
+                    ts.Debug.assert(ts.isLeftHandSideExpression(variable));
+                }
+                emitAssignment(variable, ts.createElementAccess(keysArray, keysIndex));
+                transformAndEmitEmbeddedStatement(node.statement);
+                markLabel(incrementLabel);
+                emitStatement(ts.createStatement(ts.createPostfixIncrement(keysIndex)));
+                emitBreak(conditionLabel);
+                endLoopBlock();
+            }
+            else {
+                emitStatement(ts.visitNode(node, visitor, ts.isStatement));
+            }
+        }
+        function visitForInStatement(node) {
+            // [source]
+            //      for (var x in a) {
+            //          /*body*/
+            //      }
+            //
+            // [intermediate]
+            //  .local x
+            //  .loop
+            //      for (x in a) {
+            //          /*body*/
+            //      }
+            //  .endloop
+            if (inStatementContainingYield) {
+                beginScriptLoopBlock();
+            }
+            var initializer = node.initializer;
+            if (ts.isVariableDeclarationList(initializer)) {
+                for (var _i = 0, _a = initializer.declarations; _i < _a.length; _i++) {
+                    var variable = _a[_i];
+                    hoistVariableDeclaration(variable.name);
+                }
+                node = ts.updateForIn(node, initializer.declarations[0].name, ts.visitNode(node.expression, visitor, ts.isExpression), ts.visitNode(node.statement, visitor, ts.isStatement, ts.liftToBlock));
+            }
+            else {
+                node = ts.visitEachChild(node, visitor, context);
+            }
+            if (inStatementContainingYield) {
+                endLoopBlock();
+            }
+            return node;
+        }
+        function transformAndEmitContinueStatement(node) {
+            var label = findContinueTarget(node.label ? ts.idText(node.label) : undefined);
+            if (label > 0) {
+                emitBreak(label, /*location*/ node);
+            }
+            else {
+                // invalid continue without a containing loop. Leave the node as is, per #17875.
+                emitStatement(node);
+            }
+        }
+        function visitContinueStatement(node) {
+            if (inStatementContainingYield) {
+                var label = findContinueTarget(node.label && ts.idText(node.label));
+                if (label > 0) {
+                    return createInlineBreak(label, /*location*/ node);
+                }
+            }
+            return ts.visitEachChild(node, visitor, context);
+        }
+        function transformAndEmitBreakStatement(node) {
+            var label = findBreakTarget(node.label ? ts.idText(node.label) : undefined);
+            if (label > 0) {
+                emitBreak(label, /*location*/ node);
+            }
+            else {
+                // invalid break without a containing loop, switch, or labeled statement. Leave the node as is, per #17875.
+                emitStatement(node);
+            }
+        }
+        function visitBreakStatement(node) {
+            if (inStatementContainingYield) {
+                var label = findBreakTarget(node.label && ts.idText(node.label));
+                if (label > 0) {
+                    return createInlineBreak(label, /*location*/ node);
+                }
+            }
+            return ts.visitEachChild(node, visitor, context);
+        }
+        function transformAndEmitReturnStatement(node) {
+            emitReturn(ts.visitNode(node.expression, visitor, ts.isExpression), 
+            /*location*/ node);
+        }
+        function visitReturnStatement(node) {
+            return createInlineReturn(ts.visitNode(node.expression, visitor, ts.isExpression), 
+            /*location*/ node);
+        }
+        function transformAndEmitWithStatement(node) {
+            if (containsYield(node)) {
+                // [source]
+                //      with (x) {
+                //          /*body*/
+                //      }
+                //
+                // [intermediate]
+                //  .with (x)
+                //      /*body*/
+                //  .endwith
+                beginWithBlock(cacheExpression(ts.visitNode(node.expression, visitor, ts.isExpression)));
+                transformAndEmitEmbeddedStatement(node.statement);
+                endWithBlock();
+            }
+            else {
+                emitStatement(ts.visitNode(node, visitor, ts.isStatement));
+            }
+        }
+        function transformAndEmitSwitchStatement(node) {
+            if (containsYield(node.caseBlock)) {
+                // [source]
+                //      switch (x) {
+                //          case a:
+                //              /*caseStatements*/
+                //          case b:
+                //              /*caseStatements*/
+                //          default:
+                //              /*defaultStatements*/
+                //      }
+                //
+                // [intermediate]
+                //  .local _a
+                //  .switch endLabel
+                //      _a = x;
+                //      switch (_a) {
+                //          case a:
+                //  .br clauseLabels[0]
+                //      }
+                //      switch (_a) {
+                //          case b:
+                //  .br clauseLabels[1]
+                //      }
+                //  .br clauseLabels[2]
+                //  .mark clauseLabels[0]
+                //      /*caseStatements*/
+                //  .mark clauseLabels[1]
+                //      /*caseStatements*/
+                //  .mark clauseLabels[2]
+                //      /*caseStatements*/
+                //  .endswitch
+                //  .mark endLabel
+                var caseBlock = node.caseBlock;
+                var numClauses = caseBlock.clauses.length;
+                var endLabel = beginSwitchBlock();
+                var expression = cacheExpression(ts.visitNode(node.expression, visitor, ts.isExpression));
+                // Create labels for each clause and find the index of the first default clause.
+                var clauseLabels = [];
+                var defaultClauseIndex = -1;
+                for (var i = 0; i < numClauses; i++) {
+                    var clause = caseBlock.clauses[i];
+                    clauseLabels.push(defineLabel());
+                    if (clause.kind === 267 /* DefaultClause */ && defaultClauseIndex === -1) {
+                        defaultClauseIndex = i;
+                    }
+                }
+                // Emit switch statements for each run of case clauses either from the first case
+                // clause or the next case clause with a `yield` in its expression, up to the next
+                // case clause with a `yield` in its expression.
+                var clausesWritten = 0;
+                var pendingClauses = [];
+                while (clausesWritten < numClauses) {
+                    var defaultClausesSkipped = 0;
+                    for (var i = clausesWritten; i < numClauses; i++) {
+                        var clause = caseBlock.clauses[i];
+                        if (clause.kind === 266 /* CaseClause */) {
+                            if (containsYield(clause.expression) && pendingClauses.length > 0) {
+                                break;
+                            }
+                            pendingClauses.push(ts.createCaseClause(ts.visitNode(clause.expression, visitor, ts.isExpression), [
+                                createInlineBreak(clauseLabels[i], /*location*/ clause.expression)
+                            ]));
+                        }
+                        else {
+                            defaultClausesSkipped++;
+                        }
+                    }
+                    if (pendingClauses.length) {
+                        emitStatement(ts.createSwitch(expression, ts.createCaseBlock(pendingClauses)));
+                        clausesWritten += pendingClauses.length;
+                        pendingClauses = [];
+                    }
+                    if (defaultClausesSkipped > 0) {
+                        clausesWritten += defaultClausesSkipped;
+                        defaultClausesSkipped = 0;
+                    }
+                }
+                if (defaultClauseIndex >= 0) {
+                    emitBreak(clauseLabels[defaultClauseIndex]);
+                }
+                else {
+                    emitBreak(endLabel);
+                }
+                for (var i = 0; i < numClauses; i++) {
+                    markLabel(clauseLabels[i]);
+                    transformAndEmitStatements(caseBlock.clauses[i].statements);
+                }
+                endSwitchBlock();
+            }
+            else {
+                emitStatement(ts.visitNode(node, visitor, ts.isStatement));
+            }
+        }
+        function visitSwitchStatement(node) {
+            if (inStatementContainingYield) {
+                beginScriptSwitchBlock();
+            }
+            node = ts.visitEachChild(node, visitor, context);
+            if (inStatementContainingYield) {
+                endSwitchBlock();
+            }
+            return node;
+        }
+        function transformAndEmitLabeledStatement(node) {
+            if (containsYield(node)) {
+                // [source]
+                //      x: {
+                //          /*body*/
+                //      }
+                //
+                // [intermediate]
+                //  .labeled "x", endLabel
+                //      /*body*/
+                //  .endlabeled
+                //  .mark endLabel
+                beginLabeledBlock(ts.idText(node.label));
+                transformAndEmitEmbeddedStatement(node.statement);
+                endLabeledBlock();
+            }
+            else {
+                emitStatement(ts.visitNode(node, visitor, ts.isStatement));
+            }
+        }
+        function visitLabeledStatement(node) {
+            if (inStatementContainingYield) {
+                beginScriptLabeledBlock(ts.idText(node.label));
+            }
+            node = ts.visitEachChild(node, visitor, context);
+            if (inStatementContainingYield) {
+                endLabeledBlock();
+            }
+            return node;
+        }
+        function transformAndEmitThrowStatement(node) {
+            emitThrow(ts.visitNode(node.expression, visitor, ts.isExpression), 
+            /*location*/ node);
+        }
+        function transformAndEmitTryStatement(node) {
+            if (containsYield(node)) {
+                // [source]
+                //      try {
+                //          /*tryBlock*/
+                //      }
+                //      catch (e) {
+                //          /*catchBlock*/
+                //      }
+                //      finally {
+                //          /*finallyBlock*/
+                //      }
+                //
+                // [intermediate]
+                //  .local _a
+                //  .try tryLabel, catchLabel, finallyLabel, endLabel
+                //  .mark tryLabel
+                //  .nop
+                //      /*tryBlock*/
+                //  .br endLabel
+                //  .catch
+                //  .mark catchLabel
+                //      _a = %error%;
+                //      /*catchBlock*/
+                //  .br endLabel
+                //  .finally
+                //  .mark finallyLabel
+                //      /*finallyBlock*/
+                //  .endfinally
+                //  .endtry
+                //  .mark endLabel
+                beginExceptionBlock();
+                transformAndEmitEmbeddedStatement(node.tryBlock);
+                if (node.catchClause) {
+                    beginCatchBlock(node.catchClause.variableDeclaration); // TODO: GH#18217
+                    transformAndEmitEmbeddedStatement(node.catchClause.block);
+                }
+                if (node.finallyBlock) {
+                    beginFinallyBlock();
+                    transformAndEmitEmbeddedStatement(node.finallyBlock);
+                }
+                endExceptionBlock();
+            }
+            else {
+                emitStatement(ts.visitEachChild(node, visitor, context));
+            }
+        }
+        function containsYield(node) {
+            return !!node && (node.transformFlags & 16777216 /* ContainsYield */) !== 0;
+        }
+        function countInitialNodesWithoutYield(nodes) {
+            var numNodes = nodes.length;
+            for (var i = 0; i < numNodes; i++) {
+                if (containsYield(nodes[i])) {
+                    return i;
+                }
+            }
+            return -1;
+        }
+        function onSubstituteNode(hint, node) {
+            node = previousOnSubstituteNode(hint, node);
+            if (hint === 1 /* Expression */) {
+                return substituteExpression(node);
+            }
+            return node;
+        }
+        function substituteExpression(node) {
+            if (ts.isIdentifier(node)) {
+                return substituteExpressionIdentifier(node);
+            }
+            return node;
+        }
+        function substituteExpressionIdentifier(node) {
+            if (!ts.isGeneratedIdentifier(node) && renamedCatchVariables && renamedCatchVariables.has(ts.idText(node))) {
+                var original = ts.getOriginalNode(node);
+                if (ts.isIdentifier(original) && original.parent) {
+                    var declaration = resolver.getReferencedValueDeclaration(original);
+                    if (declaration) {
+                        var name = renamedCatchVariableDeclarations[ts.getOriginalNodeId(declaration)];
+                        if (name) {
+                            var clone_6 = ts.getMutableClone(name);
+                            ts.setSourceMapRange(clone_6, node);
+                            ts.setCommentRange(clone_6, node);
+                            return clone_6;
+                        }
+                    }
+                }
+            }
+            return node;
+        }
+        function cacheExpression(node) {
+            var temp;
+            if (ts.isGeneratedIdentifier(node) || ts.getEmitFlags(node) & 4096 /* HelperName */) {
+                return node;
+            }
+            temp = ts.createTempVariable(hoistVariableDeclaration);
+            emitAssignment(temp, node, /*location*/ node);
+            return temp;
+        }
+        function declareLocal(name) {
+            var temp = name
+                ? ts.createUniqueName(name)
+                : ts.createTempVariable(/*recordTempVariable*/ undefined);
+            hoistVariableDeclaration(temp);
+            return temp;
+        }
+        /**
+         * Defines a label, uses as the target of a Break operation.
+         */
+        function defineLabel() {
+            if (!labelOffsets) {
+                labelOffsets = [];
+            }
+            var label = nextLabelId;
+            nextLabelId++;
+            labelOffsets[label] = -1;
+            return label;
+        }
+        /**
+         * Marks the current operation with the specified label.
+         */
+        function markLabel(label) {
+            ts.Debug.assert(labelOffsets !== undefined, "No labels were defined.");
+            labelOffsets[label] = operations ? operations.length : 0;
+        }
+        /**
+         * Begins a block operation (With, Break/Continue, Try/Catch/Finally)
+         *
+         * @param block Information about the block.
+         */
+        function beginBlock(block) {
+            if (!blocks) {
+                blocks = [];
+                blockActions = [];
+                blockOffsets = [];
+                blockStack = [];
+            }
+            var index = blockActions.length;
+            blockActions[index] = 0 /* Open */;
+            blockOffsets[index] = operations ? operations.length : 0;
+            blocks[index] = block;
+            blockStack.push(block);
+            return index;
+        }
+        /**
+         * Ends the current block operation.
+         */
+        function endBlock() {
+            var block = peekBlock();
+            if (block === undefined)
+                return ts.Debug.fail("beginBlock was never called.");
+            var index = blockActions.length;
+            blockActions[index] = 1 /* Close */;
+            blockOffsets[index] = operations ? operations.length : 0;
+            blocks[index] = block;
+            blockStack.pop();
+            return block;
+        }
+        /**
+         * Gets the current open block.
+         */
+        function peekBlock() {
+            return ts.lastOrUndefined(blockStack);
+        }
+        /**
+         * Gets the kind of the current open block.
+         */
+        function peekBlockKind() {
+            var block = peekBlock();
+            return block && block.kind;
+        }
+        /**
+         * Begins a code block for a generated `with` statement.
+         *
+         * @param expression An identifier representing expression for the `with` block.
+         */
+        function beginWithBlock(expression) {
+            var startLabel = defineLabel();
+            var endLabel = defineLabel();
+            markLabel(startLabel);
+            beginBlock({
+                kind: 1 /* With */,
+                expression: expression,
+                startLabel: startLabel,
+                endLabel: endLabel
+            });
+        }
+        /**
+         * Ends a code block for a generated `with` statement.
+         */
+        function endWithBlock() {
+            ts.Debug.assert(peekBlockKind() === 1 /* With */);
+            var block = endBlock();
+            markLabel(block.endLabel);
+        }
+        /**
+         * Begins a code block for a generated `try` statement.
+         */
+        function beginExceptionBlock() {
+            var startLabel = defineLabel();
+            var endLabel = defineLabel();
+            markLabel(startLabel);
+            beginBlock({
+                kind: 0 /* Exception */,
+                state: 0 /* Try */,
+                startLabel: startLabel,
+                endLabel: endLabel
+            });
+            emitNop();
+            return endLabel;
+        }
+        /**
+         * Enters the `catch` clause of a generated `try` statement.
+         *
+         * @param variable The catch variable.
+         */
+        function beginCatchBlock(variable) {
+            ts.Debug.assert(peekBlockKind() === 0 /* Exception */);
+            // generated identifiers should already be unique within a file
+            var name;
+            if (ts.isGeneratedIdentifier(variable.name)) {
+                name = variable.name;
+                hoistVariableDeclaration(variable.name);
+            }
+            else {
+                var text = ts.idText(variable.name);
+                name = declareLocal(text);
+                if (!renamedCatchVariables) {
+                    renamedCatchVariables = ts.createMap();
+                    renamedCatchVariableDeclarations = [];
+                    context.enableSubstitution(71 /* Identifier */);
+                }
+                renamedCatchVariables.set(text, true);
+                renamedCatchVariableDeclarations[ts.getOriginalNodeId(variable)] = name;
+            }
+            var exception = peekBlock();
+            ts.Debug.assert(exception.state < 1 /* Catch */);
+            var endLabel = exception.endLabel;
+            emitBreak(endLabel);
+            var catchLabel = defineLabel();
+            markLabel(catchLabel);
+            exception.state = 1 /* Catch */;
+            exception.catchVariable = name;
+            exception.catchLabel = catchLabel;
+            emitAssignment(name, ts.createCall(ts.createPropertyAccess(state, "sent"), /*typeArguments*/ undefined, []));
+            emitNop();
+        }
+        /**
+         * Enters the `finally` block of a generated `try` statement.
+         */
+        function beginFinallyBlock() {
+            ts.Debug.assert(peekBlockKind() === 0 /* Exception */);
+            var exception = peekBlock();
+            ts.Debug.assert(exception.state < 2 /* Finally */);
+            var endLabel = exception.endLabel;
+            emitBreak(endLabel);
+            var finallyLabel = defineLabel();
+            markLabel(finallyLabel);
+            exception.state = 2 /* Finally */;
+            exception.finallyLabel = finallyLabel;
+        }
+        /**
+         * Ends the code block for a generated `try` statement.
+         */
+        function endExceptionBlock() {
+            ts.Debug.assert(peekBlockKind() === 0 /* Exception */);
+            var exception = endBlock();
+            var state = exception.state;
+            if (state < 2 /* Finally */) {
+                emitBreak(exception.endLabel);
+            }
+            else {
+                emitEndfinally();
+            }
+            markLabel(exception.endLabel);
+            emitNop();
+            exception.state = 3 /* Done */;
+        }
+        /**
+         * Begins a code block that supports `break` or `continue` statements that are defined in
+         * the source tree and not from generated code.
+         *
+         * @param labelText Names from containing labeled statements.
+         */
+        function beginScriptLoopBlock() {
+            beginBlock({
+                kind: 3 /* Loop */,
+                isScript: true,
+                breakLabel: -1,
+                continueLabel: -1
+            });
+        }
+        /**
+         * Begins a code block that supports `break` or `continue` statements that are defined in
+         * generated code. Returns a label used to mark the operation to which to jump when a
+         * `break` statement targets this block.
+         *
+         * @param continueLabel A Label used to mark the operation to which to jump when a
+         *                      `continue` statement targets this block.
+         */
+        function beginLoopBlock(continueLabel) {
+            var breakLabel = defineLabel();
+            beginBlock({
+                kind: 3 /* Loop */,
+                isScript: false,
+                breakLabel: breakLabel,
+                continueLabel: continueLabel,
+            });
+            return breakLabel;
+        }
+        /**
+         * Ends a code block that supports `break` or `continue` statements that are defined in
+         * generated code or in the source tree.
+         */
+        function endLoopBlock() {
+            ts.Debug.assert(peekBlockKind() === 3 /* Loop */);
+            var block = endBlock();
+            var breakLabel = block.breakLabel;
+            if (!block.isScript) {
+                markLabel(breakLabel);
+            }
+        }
+        /**
+         * Begins a code block that supports `break` statements that are defined in the source
+         * tree and not from generated code.
+         *
+         */
+        function beginScriptSwitchBlock() {
+            beginBlock({
+                kind: 2 /* Switch */,
+                isScript: true,
+                breakLabel: -1
+            });
+        }
+        /**
+         * Begins a code block that supports `break` statements that are defined in generated code.
+         * Returns a label used to mark the operation to which to jump when a `break` statement
+         * targets this block.
+         */
+        function beginSwitchBlock() {
+            var breakLabel = defineLabel();
+            beginBlock({
+                kind: 2 /* Switch */,
+                isScript: false,
+                breakLabel: breakLabel,
+            });
+            return breakLabel;
+        }
+        /**
+         * Ends a code block that supports `break` statements that are defined in generated code.
+         */
+        function endSwitchBlock() {
+            ts.Debug.assert(peekBlockKind() === 2 /* Switch */);
+            var block = endBlock();
+            var breakLabel = block.breakLabel;
+            if (!block.isScript) {
+                markLabel(breakLabel);
+            }
+        }
+        function beginScriptLabeledBlock(labelText) {
+            beginBlock({
+                kind: 4 /* Labeled */,
+                isScript: true,
+                labelText: labelText,
+                breakLabel: -1
+            });
+        }
+        function beginLabeledBlock(labelText) {
+            var breakLabel = defineLabel();
+            beginBlock({
+                kind: 4 /* Labeled */,
+                isScript: false,
+                labelText: labelText,
+                breakLabel: breakLabel
+            });
+        }
+        function endLabeledBlock() {
+            ts.Debug.assert(peekBlockKind() === 4 /* Labeled */);
+            var block = endBlock();
+            if (!block.isScript) {
+                markLabel(block.breakLabel);
+            }
+        }
+        /**
+         * Indicates whether the provided block supports `break` statements.
+         *
+         * @param block A code block.
+         */
+        function supportsUnlabeledBreak(block) {
+            return block.kind === 2 /* Switch */
+                || block.kind === 3 /* Loop */;
+        }
+        /**
+         * Indicates whether the provided block supports `break` statements with labels.
+         *
+         * @param block A code block.
+         */
+        function supportsLabeledBreakOrContinue(block) {
+            return block.kind === 4 /* Labeled */;
+        }
+        /**
+         * Indicates whether the provided block supports `continue` statements.
+         *
+         * @param block A code block.
+         */
+        function supportsUnlabeledContinue(block) {
+            return block.kind === 3 /* Loop */;
+        }
+        function hasImmediateContainingLabeledBlock(labelText, start) {
+            for (var j = start; j >= 0; j--) {
+                var containingBlock = blockStack[j];
+                if (supportsLabeledBreakOrContinue(containingBlock)) {
+                    if (containingBlock.labelText === labelText) {
+                        return true;
+                    }
+                }
+                else {
+                    break;
+                }
+            }
+            return false;
+        }
+        /**
+         * Finds the label that is the target for a `break` statement.
+         *
+         * @param labelText An optional name of a containing labeled statement.
+         */
+        function findBreakTarget(labelText) {
+            if (blockStack) {
+                if (labelText) {
+                    for (var i = blockStack.length - 1; i >= 0; i--) {
+                        var block = blockStack[i];
+                        if (supportsLabeledBreakOrContinue(block) && block.labelText === labelText) {
+                            return block.breakLabel;
+                        }
+                        else if (supportsUnlabeledBreak(block) && hasImmediateContainingLabeledBlock(labelText, i - 1)) {
+                            return block.breakLabel;
+                        }
+                    }
+                }
+                else {
+                    for (var i = blockStack.length - 1; i >= 0; i--) {
+                        var block = blockStack[i];
+                        if (supportsUnlabeledBreak(block)) {
+                            return block.breakLabel;
+                        }
+                    }
+                }
+            }
+            return 0;
+        }
+        /**
+         * Finds the label that is the target for a `continue` statement.
+         *
+         * @param labelText An optional name of a containing labeled statement.
+         */
+        function findContinueTarget(labelText) {
+            if (blockStack) {
+                if (labelText) {
+                    for (var i = blockStack.length - 1; i >= 0; i--) {
+                        var block = blockStack[i];
+                        if (supportsUnlabeledContinue(block) && hasImmediateContainingLabeledBlock(labelText, i - 1)) {
+                            return block.continueLabel;
+                        }
+                    }
+                }
+                else {
+                    for (var i = blockStack.length - 1; i >= 0; i--) {
+                        var block = blockStack[i];
+                        if (supportsUnlabeledContinue(block)) {
+                            return block.continueLabel;
+                        }
+                    }
+                }
+            }
+            return 0;
+        }
+        /**
+         * Creates an expression that can be used to indicate the value for a label.
+         *
+         * @param label A label.
+         */
+        function createLabel(label) {
+            if (label !== undefined && label > 0) {
+                if (labelExpressions === undefined) {
+                    labelExpressions = [];
+                }
+                var expression = ts.createLiteral(-1);
+                if (labelExpressions[label] === undefined) {
+                    labelExpressions[label] = [expression];
+                }
+                else {
+                    labelExpressions[label].push(expression);
+                }
+                return expression;
+            }
+            return ts.createOmittedExpression();
+        }
+        /**
+         * Creates a numeric literal for the provided instruction.
+         */
+        function createInstruction(instruction) {
+            var literal = ts.createLiteral(instruction);
+            ts.addSyntheticTrailingComment(literal, 3 /* MultiLineCommentTrivia */, getInstructionName(instruction));
+            return literal;
+        }
+        /**
+         * Creates a statement that can be used indicate a Break operation to the provided label.
+         *
+         * @param label A label.
+         * @param location An optional source map location for the statement.
+         */
+        function createInlineBreak(label, location) {
+            ts.Debug.assertLessThan(0, label, "Invalid label");
+            return ts.setTextRange(ts.createReturn(ts.createArrayLiteral([
+                createInstruction(3 /* Break */),
+                createLabel(label)
+            ])), location);
+        }
+        /**
+         * Creates a statement that can be used indicate a Return operation.
+         *
+         * @param expression The expression for the return statement.
+         * @param location An optional source map location for the statement.
+         */
+        function createInlineReturn(expression, location) {
+            return ts.setTextRange(ts.createReturn(ts.createArrayLiteral(expression
+                ? [createInstruction(2 /* Return */), expression]
+                : [createInstruction(2 /* Return */)])), location);
+        }
+        /**
+         * Creates an expression that can be used to resume from a Yield operation.
+         */
+        function createGeneratorResume(location) {
+            return ts.setTextRange(ts.createCall(ts.createPropertyAccess(state, "sent"), 
+            /*typeArguments*/ undefined, []), location);
+        }
+        /**
+         * Emits an empty instruction.
+         */
+        function emitNop() {
+            emitWorker(0 /* Nop */);
+        }
+        /**
+         * Emits a Statement.
+         *
+         * @param node A statement.
+         */
+        function emitStatement(node) {
+            if (node) {
+                emitWorker(1 /* Statement */, [node]);
+            }
+            else {
+                emitNop();
+            }
+        }
+        /**
+         * Emits an Assignment operation.
+         *
+         * @param left The left-hand side of the assignment.
+         * @param right The right-hand side of the assignment.
+         * @param location An optional source map location for the assignment.
+         */
+        function emitAssignment(left, right, location) {
+            emitWorker(2 /* Assign */, [left, right], location);
+        }
+        /**
+         * Emits a Break operation to the specified label.
+         *
+         * @param label A label.
+         * @param location An optional source map location for the assignment.
+         */
+        function emitBreak(label, location) {
+            emitWorker(3 /* Break */, [label], location);
+        }
+        /**
+         * Emits a Break operation to the specified label when a condition evaluates to a truthy
+         * value at runtime.
+         *
+         * @param label A label.
+         * @param condition The condition.
+         * @param location An optional source map location for the assignment.
+         */
+        function emitBreakWhenTrue(label, condition, location) {
+            emitWorker(4 /* BreakWhenTrue */, [label, condition], location);
+        }
+        /**
+         * Emits a Break to the specified label when a condition evaluates to a falsey value at
+         * runtime.
+         *
+         * @param label A label.
+         * @param condition The condition.
+         * @param location An optional source map location for the assignment.
+         */
+        function emitBreakWhenFalse(label, condition, location) {
+            emitWorker(5 /* BreakWhenFalse */, [label, condition], location);
+        }
+        /**
+         * Emits a YieldStar operation for the provided expression.
+         *
+         * @param expression An optional value for the yield operation.
+         * @param location An optional source map location for the assignment.
+         */
+        function emitYieldStar(expression, location) {
+            emitWorker(7 /* YieldStar */, [expression], location);
+        }
+        /**
+         * Emits a Yield operation for the provided expression.
+         *
+         * @param expression An optional value for the yield operation.
+         * @param location An optional source map location for the assignment.
+         */
+        function emitYield(expression, location) {
+            emitWorker(6 /* Yield */, [expression], location);
+        }
+        /**
+         * Emits a Return operation for the provided expression.
+         *
+         * @param expression An optional value for the operation.
+         * @param location An optional source map location for the assignment.
+         */
+        function emitReturn(expression, location) {
+            emitWorker(8 /* Return */, [expression], location);
+        }
+        /**
+         * Emits a Throw operation for the provided expression.
+         *
+         * @param expression A value for the operation.
+         * @param location An optional source map location for the assignment.
+         */
+        function emitThrow(expression, location) {
+            emitWorker(9 /* Throw */, [expression], location);
+        }
+        /**
+         * Emits an Endfinally operation. This is used to handle `finally` block semantics.
+         */
+        function emitEndfinally() {
+            emitWorker(10 /* Endfinally */);
+        }
+        /**
+         * Emits an operation.
+         *
+         * @param code The OpCode for the operation.
+         * @param args The optional arguments for the operation.
+         */
+        function emitWorker(code, args, location) {
+            if (operations === undefined) {
+                operations = [];
+                operationArguments = [];
+                operationLocations = [];
+            }
+            if (labelOffsets === undefined) {
+                // mark entry point
+                markLabel(defineLabel());
+            }
+            var operationIndex = operations.length;
+            operations[operationIndex] = code;
+            operationArguments[operationIndex] = args;
+            operationLocations[operationIndex] = location;
+        }
+        /**
+         * Builds the generator function body.
+         */
+        function build() {
+            blockIndex = 0;
+            labelNumber = 0;
+            labelNumbers = undefined;
+            lastOperationWasAbrupt = false;
+            lastOperationWasCompletion = false;
+            clauses = undefined;
+            statements = undefined;
+            exceptionBlockStack = undefined;
+            currentExceptionBlock = undefined;
+            withBlockStack = undefined;
+            var buildResult = buildStatements();
+            return createGeneratorHelper(context, ts.setEmitFlags(ts.createFunctionExpression(
+            /*modifiers*/ undefined, 
+            /*asteriskToken*/ undefined, 
+            /*name*/ undefined, 
+            /*typeParameters*/ undefined, [ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, state)], 
+            /*type*/ undefined, ts.createBlock(buildResult, 
+            /*multiLine*/ buildResult.length > 0)), 524288 /* ReuseTempVariableScope */));
+        }
+        /**
+         * Builds the statements for the generator function body.
+         */
+        function buildStatements() {
+            if (operations) {
+                for (var operationIndex = 0; operationIndex < operations.length; operationIndex++) {
+                    writeOperation(operationIndex);
+                }
+                flushFinalLabel(operations.length);
+            }
+            else {
+                flushFinalLabel(0);
+            }
+            if (clauses) {
+                var labelExpression = ts.createPropertyAccess(state, "label");
+                var switchStatement = ts.createSwitch(labelExpression, ts.createCaseBlock(clauses));
+                return [ts.startOnNewLine(switchStatement)];
+            }
+            if (statements) {
+                return statements;
+            }
+            return [];
+        }
+        /**
+         * Flush the current label and advance to a new label.
+         */
+        function flushLabel() {
+            if (!statements) {
+                return;
+            }
+            appendLabel(/*markLabelEnd*/ !lastOperationWasAbrupt);
+            lastOperationWasAbrupt = false;
+            lastOperationWasCompletion = false;
+            labelNumber++;
+        }
+        /**
+         * Flush the final label of the generator function body.
+         */
+        function flushFinalLabel(operationIndex) {
+            if (isFinalLabelReachable(operationIndex)) {
+                tryEnterLabel(operationIndex);
+                withBlockStack = undefined;
+                writeReturn(/*expression*/ undefined, /*operationLocation*/ undefined);
+            }
+            if (statements && clauses) {
+                appendLabel(/*markLabelEnd*/ false);
+            }
+            updateLabelExpressions();
+        }
+        /**
+         * Tests whether the final label of the generator function body
+         * is reachable by user code.
+         */
+        function isFinalLabelReachable(operationIndex) {
+            // if the last operation was *not* a completion (return/throw) then
+            // the final label is reachable.
+            if (!lastOperationWasCompletion) {
+                return true;
+            }
+            // if there are no labels defined or referenced, then the final label is
+            // not reachable.
+            if (!labelOffsets || !labelExpressions) {
+                return false;
+            }
+            // if the label for this offset is referenced, then the final label
+            // is reachable.
+            for (var label = 0; label < labelOffsets.length; label++) {
+                if (labelOffsets[label] === operationIndex && labelExpressions[label]) {
+                    return true;
+                }
+            }
+            return false;
+        }
+        /**
+         * Appends a case clause for the last label and sets the new label.
+         *
+         * @param markLabelEnd Indicates that the transition between labels was a fall-through
+         *                     from a previous case clause and the change in labels should be
+         *                     reflected on the `state` object.
+         */
+        function appendLabel(markLabelEnd) {
+            if (!clauses) {
+                clauses = [];
+            }
+            if (statements) {
+                if (withBlockStack) {
+                    // The previous label was nested inside one or more `with` blocks, so we
+                    // surround the statements in generated `with` blocks to create the same environment.
+                    for (var i = withBlockStack.length - 1; i >= 0; i--) {
+                        var withBlock = withBlockStack[i];
+                        statements = [ts.createWith(withBlock.expression, ts.createBlock(statements))];
+                    }
+                }
+                if (currentExceptionBlock) {
+                    // The previous label was nested inside of an exception block, so we must
+                    // indicate entry into a protected region by pushing the label numbers
+                    // for each block in the protected region.
+                    var startLabel = currentExceptionBlock.startLabel, catchLabel = currentExceptionBlock.catchLabel, finallyLabel = currentExceptionBlock.finallyLabel, endLabel = currentExceptionBlock.endLabel;
+                    statements.unshift(ts.createStatement(ts.createCall(ts.createPropertyAccess(ts.createPropertyAccess(state, "trys"), "push"), 
+                    /*typeArguments*/ undefined, [
+                        ts.createArrayLiteral([
+                            createLabel(startLabel),
+                            createLabel(catchLabel),
+                            createLabel(finallyLabel),
+                            createLabel(endLabel)
+                        ])
+                    ])));
+                    currentExceptionBlock = undefined;
+                }
+                if (markLabelEnd) {
+                    // The case clause for the last label falls through to this label, so we
+                    // add an assignment statement to reflect the change in labels.
+                    statements.push(ts.createStatement(ts.createAssignment(ts.createPropertyAccess(state, "label"), ts.createLiteral(labelNumber + 1))));
+                }
+            }
+            clauses.push(ts.createCaseClause(ts.createLiteral(labelNumber), statements || []));
+            statements = undefined;
+        }
+        /**
+         * Tries to enter into a new label at the current operation index.
+         */
+        function tryEnterLabel(operationIndex) {
+            if (!labelOffsets) {
+                return;
+            }
+            for (var label = 0; label < labelOffsets.length; label++) {
+                if (labelOffsets[label] === operationIndex) {
+                    flushLabel();
+                    if (labelNumbers === undefined) {
+                        labelNumbers = [];
+                    }
+                    if (labelNumbers[labelNumber] === undefined) {
+                        labelNumbers[labelNumber] = [label];
+                    }
+                    else {
+                        labelNumbers[labelNumber].push(label);
+                    }
+                }
+            }
+        }
+        /**
+         * Updates literal expressions for labels with actual label numbers.
+         */
+        function updateLabelExpressions() {
+            if (labelExpressions !== undefined && labelNumbers !== undefined) {
+                for (var labelNumber_1 = 0; labelNumber_1 < labelNumbers.length; labelNumber_1++) {
+                    var labels = labelNumbers[labelNumber_1];
+                    if (labels !== undefined) {
+                        for (var _i = 0, labels_1 = labels; _i < labels_1.length; _i++) {
+                            var label = labels_1[_i];
+                            var expressions = labelExpressions[label];
+                            if (expressions !== undefined) {
+                                for (var _a = 0, expressions_1 = expressions; _a < expressions_1.length; _a++) {
+                                    var expression = expressions_1[_a];
+                                    expression.text = String(labelNumber_1);
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+        /**
+         * Tries to enter or leave a code block.
+         */
+        function tryEnterOrLeaveBlock(operationIndex) {
+            if (blocks) {
+                for (; blockIndex < blockActions.length && blockOffsets[blockIndex] <= operationIndex; blockIndex++) {
+                    var block = blocks[blockIndex];
+                    var blockAction = blockActions[blockIndex];
+                    switch (block.kind) {
+                        case 0 /* Exception */:
+                            if (blockAction === 0 /* Open */) {
+                                if (!exceptionBlockStack) {
+                                    exceptionBlockStack = [];
+                                }
+                                if (!statements) {
+                                    statements = [];
+                                }
+                                exceptionBlockStack.push(currentExceptionBlock);
+                                currentExceptionBlock = block;
+                            }
+                            else if (blockAction === 1 /* Close */) {
+                                currentExceptionBlock = exceptionBlockStack.pop();
+                            }
+                            break;
+                        case 1 /* With */:
+                            if (blockAction === 0 /* Open */) {
+                                if (!withBlockStack) {
+                                    withBlockStack = [];
+                                }
+                                withBlockStack.push(block);
+                            }
+                            else if (blockAction === 1 /* Close */) {
+                                withBlockStack.pop();
+                            }
+                            break;
+                        // default: do nothing
+                    }
+                }
+            }
+        }
+        /**
+         * Writes an operation as a statement to the current label's statement list.
+         *
+         * @param operation The OpCode of the operation
+         */
+        function writeOperation(operationIndex) {
+            tryEnterLabel(operationIndex);
+            tryEnterOrLeaveBlock(operationIndex);
+            // early termination, nothing else to process in this label
+            if (lastOperationWasAbrupt) {
+                return;
+            }
+            lastOperationWasAbrupt = false;
+            lastOperationWasCompletion = false;
+            var opcode = operations[operationIndex];
+            if (opcode === 0 /* Nop */) {
+                return;
+            }
+            else if (opcode === 10 /* Endfinally */) {
+                return writeEndfinally();
+            }
+            var args = operationArguments[operationIndex];
+            if (opcode === 1 /* Statement */) {
+                return writeStatement(args[0]);
+            }
+            var location = operationLocations[operationIndex];
+            switch (opcode) {
+                case 2 /* Assign */:
+                    return writeAssign(args[0], args[1], location);
+                case 3 /* Break */:
+                    return writeBreak(args[0], location);
+                case 4 /* BreakWhenTrue */:
+                    return writeBreakWhenTrue(args[0], args[1], location);
+                case 5 /* BreakWhenFalse */:
+                    return writeBreakWhenFalse(args[0], args[1], location);
+                case 6 /* Yield */:
+                    return writeYield(args[0], location);
+                case 7 /* YieldStar */:
+                    return writeYieldStar(args[0], location);
+                case 8 /* Return */:
+                    return writeReturn(args[0], location);
+                case 9 /* Throw */:
+                    return writeThrow(args[0], location);
+            }
+        }
+        /**
+         * Writes a statement to the current label's statement list.
+         *
+         * @param statement A statement to write.
+         */
+        function writeStatement(statement) {
+            if (statement) {
+                if (!statements) {
+                    statements = [statement];
+                }
+                else {
+                    statements.push(statement);
+                }
+            }
+        }
+        /**
+         * Writes an Assign operation to the current label's statement list.
+         *
+         * @param left The left-hand side of the assignment.
+         * @param right The right-hand side of the assignment.
+         * @param operationLocation The source map location for the operation.
+         */
+        function writeAssign(left, right, operationLocation) {
+            writeStatement(ts.setTextRange(ts.createStatement(ts.createAssignment(left, right)), operationLocation));
+        }
+        /**
+         * Writes a Throw operation to the current label's statement list.
+         *
+         * @param expression The value to throw.
+         * @param operationLocation The source map location for the operation.
+         */
+        function writeThrow(expression, operationLocation) {
+            lastOperationWasAbrupt = true;
+            lastOperationWasCompletion = true;
+            writeStatement(ts.setTextRange(ts.createThrow(expression), operationLocation));
+        }
+        /**
+         * Writes a Return operation to the current label's statement list.
+         *
+         * @param expression The value to return.
+         * @param operationLocation The source map location for the operation.
+         */
+        function writeReturn(expression, operationLocation) {
+            lastOperationWasAbrupt = true;
+            lastOperationWasCompletion = true;
+            writeStatement(ts.setEmitFlags(ts.setTextRange(ts.createReturn(ts.createArrayLiteral(expression
+                ? [createInstruction(2 /* Return */), expression]
+                : [createInstruction(2 /* Return */)])), operationLocation), 384 /* NoTokenSourceMaps */));
+        }
+        /**
+         * Writes a Break operation to the current label's statement list.
+         *
+         * @param label The label for the Break.
+         * @param operationLocation The source map location for the operation.
+         */
+        function writeBreak(label, operationLocation) {
+            lastOperationWasAbrupt = true;
+            writeStatement(ts.setEmitFlags(ts.setTextRange(ts.createReturn(ts.createArrayLiteral([
+                createInstruction(3 /* Break */),
+                createLabel(label)
+            ])), operationLocation), 384 /* NoTokenSourceMaps */));
+        }
+        /**
+         * Writes a BreakWhenTrue operation to the current label's statement list.
+         *
+         * @param label The label for the Break.
+         * @param condition The condition for the Break.
+         * @param operationLocation The source map location for the operation.
+         */
+        function writeBreakWhenTrue(label, condition, operationLocation) {
+            writeStatement(ts.setEmitFlags(ts.createIf(condition, ts.setEmitFlags(ts.setTextRange(ts.createReturn(ts.createArrayLiteral([
+                createInstruction(3 /* Break */),
+                createLabel(label)
+            ])), operationLocation), 384 /* NoTokenSourceMaps */)), 1 /* SingleLine */));
+        }
+        /**
+         * Writes a BreakWhenFalse operation to the current label's statement list.
+         *
+         * @param label The label for the Break.
+         * @param condition The condition for the Break.
+         * @param operationLocation The source map location for the operation.
+         */
+        function writeBreakWhenFalse(label, condition, operationLocation) {
+            writeStatement(ts.setEmitFlags(ts.createIf(ts.createLogicalNot(condition), ts.setEmitFlags(ts.setTextRange(ts.createReturn(ts.createArrayLiteral([
+                createInstruction(3 /* Break */),
+                createLabel(label)
+            ])), operationLocation), 384 /* NoTokenSourceMaps */)), 1 /* SingleLine */));
+        }
+        /**
+         * Writes a Yield operation to the current label's statement list.
+         *
+         * @param expression The expression to yield.
+         * @param operationLocation The source map location for the operation.
+         */
+        function writeYield(expression, operationLocation) {
+            lastOperationWasAbrupt = true;
+            writeStatement(ts.setEmitFlags(ts.setTextRange(ts.createReturn(ts.createArrayLiteral(expression
+                ? [createInstruction(4 /* Yield */), expression]
+                : [createInstruction(4 /* Yield */)])), operationLocation), 384 /* NoTokenSourceMaps */));
+        }
+        /**
+         * Writes a YieldStar instruction to the current label's statement list.
+         *
+         * @param expression The expression to yield.
+         * @param operationLocation The source map location for the operation.
+         */
+        function writeYieldStar(expression, operationLocation) {
+            lastOperationWasAbrupt = true;
+            writeStatement(ts.setEmitFlags(ts.setTextRange(ts.createReturn(ts.createArrayLiteral([
+                createInstruction(5 /* YieldStar */),
+                expression
+            ])), operationLocation), 384 /* NoTokenSourceMaps */));
+        }
+        /**
+         * Writes an Endfinally instruction to the current label's statement list.
+         */
+        function writeEndfinally() {
+            lastOperationWasAbrupt = true;
+            writeStatement(ts.createReturn(ts.createArrayLiteral([
+                createInstruction(7 /* Endfinally */)
+            ])));
+        }
+    }
+    ts.transformGenerators = transformGenerators;
+    function createGeneratorHelper(context, body) {
+        context.requestEmitHelper(generatorHelper);
+        return ts.createCall(ts.getHelperName("__generator"), 
+        /*typeArguments*/ undefined, [ts.createThis(), body]);
+    }
+    // The __generator helper is used by down-level transformations to emulate the runtime
+    // semantics of an ES2015 generator function. When called, this helper returns an
+    // object that implements the Iterator protocol, in that it has `next`, `return`, and
+    // `throw` methods that step through the generator when invoked.
+    //
+    // parameters:
+    //  @param thisArg  The value to use as the `this` binding for the transformed generator body.
+    //  @param body     A function that acts as the transformed generator body.
+    //
+    // variables:
+    //  _       Persistent state for the generator that is shared between the helper and the
+    //          generator body. The state object has the following members:
+    //            sent() - A method that returns or throws the current completion value.
+    //            label  - The next point at which to resume evaluation of the generator body.
+    //            trys   - A stack of protected regions (try/catch/finally blocks).
+    //            ops    - A stack of pending instructions when inside of a finally block.
+    //  f       A value indicating whether the generator is executing.
+    //  y       An iterator to delegate for a yield*.
+    //  t       A temporary variable that holds one of the following values (note that these
+    //          cases do not overlap):
+    //          - The completion value when resuming from a `yield` or `yield*`.
+    //          - The error value for a catch block.
+    //          - The current protected region (array of try/catch/finally/end labels).
+    //          - The verb (`next`, `throw`, or `return` method) to delegate to the expression
+    //            of a `yield*`.
+    //          - The result of evaluating the verb delegated to the expression of a `yield*`.
+    //
+    // functions:
+    //  verb(n)     Creates a bound callback to the `step` function for opcode `n`.
+    //  step(op)    Evaluates opcodes in a generator body until execution is suspended or
+    //              completed.
+    //
+    // The __generator helper understands a limited set of instructions:
+    //  0: next(value?)     - Start or resume the generator with the specified value.
+    //  1: throw(error)     - Resume the generator with an exception. If the generator is
+    //                        suspended inside of one or more protected regions, evaluates
+    //                        any intervening finally blocks between the current label and
+    //                        the nearest catch block or function boundary. If uncaught, the
+    //                        exception is thrown to the caller.
+    //  2: return(value?)   - Resume the generator as if with a return. If the generator is
+    //                        suspended inside of one or more protected regions, evaluates any
+    //                        intervening finally blocks.
+    //  3: break(label)     - Jump to the specified label. If the label is outside of the
+    //                        current protected region, evaluates any intervening finally
+    //                        blocks.
+    //  4: yield(value?)    - Yield execution to the caller with an optional value. When
+    //                        resumed, the generator will continue at the next label.
+    //  5: yield*(value)    - Delegates evaluation to the supplied iterator. When
+    //                        delegation completes, the generator will continue at the next
+    //                        label.
+    //  6: catch(error)     - Handles an exception thrown from within the generator body. If
+    //                        the current label is inside of one or more protected regions,
+    //                        evaluates any intervening finally blocks between the current
+    //                        label and the nearest catch block or function boundary. If
+    //                        uncaught, the exception is thrown to the caller.
+    //  7: endfinally       - Ends a finally block, resuming the last instruction prior to
+    //                        entering a finally block.
+    //
+    // For examples of how these are used, see the comments in ./transformers/generators.ts
+    var generatorHelper = {
+        name: "typescript:generator",
+        scoped: false,
+        priority: 6,
+        text: "\n            var __generator = (this && this.__generator) || function (thisArg, body) {\n                var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;\n                return g = { next: verb(0), \"throw\": verb(1), \"return\": verb(2) }, typeof Symbol === \"function\" && (g[Symbol.iterator] = function() { return this; }), g;\n                function verb(n) { return function (v) { return step([n, v]); }; }\n                function step(op) {\n                    if (f) throw new TypeError(\"Generator is already executing.\");\n                    while (_) try {\n                        if (f = 1, y && (t = op[0] & 2 ? y[\"return\"] : op[0] ? y[\"throw\"] || ((t = y[\"return\"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;\n                        if (y = 0, t) op = [op[0] & 2, t.value];\n                        switch (op[0]) {\n                            case 0: case 1: t = op; break;\n                            case 4: _.label++; return { value: op[1], done: false };\n                            case 5: _.label++; y = op[1]; op = [0]; continue;\n                            case 7: op = _.ops.pop(); _.trys.pop(); continue;\n                            default:\n                                if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }\n                                if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }\n                                if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }\n                                if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }\n                                if (t[2]) _.ops.pop();\n                                _.trys.pop(); continue;\n                        }\n                        op = body.call(thisArg, _);\n                    } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }\n                    if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };\n                }\n            };"
+    };
+})(ts || (ts = {}));
+/*@internal*/
+var ts;
+(function (ts) {
+    function transformModule(context) {
+        function getTransformModuleDelegate(moduleKind) {
+            switch (moduleKind) {
+                case ts.ModuleKind.AMD: return transformAMDModule;
+                case ts.ModuleKind.UMD: return transformUMDModule;
+                default: return transformCommonJSModule;
+            }
+        }
+        var startLexicalEnvironment = context.startLexicalEnvironment, endLexicalEnvironment = context.endLexicalEnvironment, hoistVariableDeclaration = context.hoistVariableDeclaration;
+        var compilerOptions = context.getCompilerOptions();
+        var resolver = context.getEmitResolver();
+        var host = context.getEmitHost();
+        var languageVersion = ts.getEmitScriptTarget(compilerOptions);
+        var moduleKind = ts.getEmitModuleKind(compilerOptions);
+        var previousOnSubstituteNode = context.onSubstituteNode;
+        var previousOnEmitNode = context.onEmitNode;
+        context.onSubstituteNode = onSubstituteNode;
+        context.onEmitNode = onEmitNode;
+        context.enableSubstitution(71 /* Identifier */); // Substitutes expression identifiers with imported/exported symbols.
+        context.enableSubstitution(200 /* BinaryExpression */); // Substitutes assignments to exported symbols.
+        context.enableSubstitution(198 /* PrefixUnaryExpression */); // Substitutes updates to exported symbols.
+        context.enableSubstitution(199 /* PostfixUnaryExpression */); // Substitutes updates to exported symbols.
+        context.enableSubstitution(271 /* ShorthandPropertyAssignment */); // Substitutes shorthand property assignments for imported/exported symbols.
+        context.enableEmitNotification(274 /* SourceFile */); // Restore state when substituting nodes in a file.
+        var moduleInfoMap = []; // The ExternalModuleInfo for each file.
+        var deferredExports = []; // Exports to defer until an EndOfDeclarationMarker is found.
+        var currentSourceFile; // The current file.
+        var currentModuleInfo; // The ExternalModuleInfo for the current file.
+        var noSubstitution; // Set of nodes for which substitution rules should be ignored.
+        var needUMDDynamicImportHelper;
+        return ts.chainBundle(transformSourceFile);
+        /**
+         * Transforms the module aspects of a SourceFile.
+         *
+         * @param node The SourceFile node.
+         */
+        function transformSourceFile(node) {
+            if (node.isDeclarationFile || !(ts.isEffectiveExternalModule(node, compilerOptions) || node.transformFlags & 67108864 /* ContainsDynamicImport */)) {
+                return node;
+            }
+            currentSourceFile = node;
+            currentModuleInfo = ts.collectExternalModuleInfo(node, resolver, compilerOptions);
+            moduleInfoMap[ts.getOriginalNodeId(node)] = currentModuleInfo;
+            // Perform the transformation.
+            var transformModule = getTransformModuleDelegate(moduleKind);
+            var updated = transformModule(node);
+            currentSourceFile = undefined;
+            currentModuleInfo = undefined;
+            needUMDDynamicImportHelper = false;
+            return ts.aggregateTransformFlags(updated);
+        }
+        function shouldEmitUnderscoreUnderscoreESModule() {
+            if (!currentModuleInfo.exportEquals && ts.isExternalModule(currentSourceFile)) {
+                return true;
+            }
+            return false;
+        }
+        /**
+         * Transforms a SourceFile into a CommonJS module.
+         *
+         * @param node The SourceFile node.
+         */
+        function transformCommonJSModule(node) {
+            startLexicalEnvironment();
+            var statements = [];
+            var ensureUseStrict = ts.getStrictOptionValue(compilerOptions, "alwaysStrict") || (!compilerOptions.noImplicitUseStrict && ts.isExternalModule(currentSourceFile));
+            var statementOffset = ts.addPrologue(statements, node.statements, ensureUseStrict, sourceElementVisitor);
+            if (shouldEmitUnderscoreUnderscoreESModule()) {
+                ts.append(statements, createUnderscoreUnderscoreESModule());
+            }
+            ts.append(statements, ts.visitNode(currentModuleInfo.externalHelpersImportDeclaration, sourceElementVisitor, ts.isStatement));
+            ts.addRange(statements, ts.visitNodes(node.statements, sourceElementVisitor, ts.isStatement, statementOffset));
+            addExportEqualsIfNeeded(statements, /*emitAsReturn*/ false);
+            ts.prependStatements(statements, endLexicalEnvironment());
+            var updated = ts.updateSourceFileNode(node, ts.setTextRange(ts.createNodeArray(statements), node.statements));
+            if (currentModuleInfo.hasExportStarsToExportValues && !compilerOptions.importHelpers) {
+                // If we have any `export * from ...` declarations
+                // we need to inform the emitter to add the __export helper.
+                ts.addEmitHelper(updated, exportStarHelper);
+            }
+            ts.addEmitHelpers(updated, context.readEmitHelpers());
+            return updated;
+        }
+        /**
+         * Transforms a SourceFile into an AMD module.
+         *
+         * @param node The SourceFile node.
+         */
+        function transformAMDModule(node) {
+            var define = ts.createIdentifier("define");
+            var moduleName = ts.tryGetModuleNameFromFile(node, host, compilerOptions);
+            // An AMD define function has the following shape:
+            //
+            //     define(id?, dependencies?, factory);
+            //
+            // This has the shape of the following:
+            //
+            //     define(name, ["module1", "module2"], function (module1Alias) { ... }
+            //
+            // The location of the alias in the parameter list in the factory function needs to
+            // match the position of the module name in the dependency list.
+            //
+            // To ensure this is true in cases of modules with no aliases, e.g.:
+            //
+            //     import "module"
+            //
+            // or
+            //
+            //     /// <amd-dependency path= "a.css" />
+            //
+            // we need to add modules without alias names to the end of the dependencies list
+            var _a = collectAsynchronousDependencies(node, /*includeNonAmdDependencies*/ true), aliasedModuleNames = _a.aliasedModuleNames, unaliasedModuleNames = _a.unaliasedModuleNames, importAliasNames = _a.importAliasNames;
+            // Create an updated SourceFile:
+            //
+            //     define(moduleName?, ["module1", "module2"], function ...
+            var updated = ts.updateSourceFileNode(node, ts.setTextRange(ts.createNodeArray([
+                ts.createStatement(ts.createCall(define, 
+                /*typeArguments*/ undefined, (moduleName ? [moduleName] : []).concat([
+                    // Add the dependency array argument:
+                    //
+                    //     ["require", "exports", module1", "module2", ...]
+                    ts.createArrayLiteral([
+                        ts.createLiteral("require"),
+                        ts.createLiteral("exports")
+                    ].concat(aliasedModuleNames, unaliasedModuleNames)),
+                    // Add the module body function argument:
+                    //
+                    //     function (require, exports, module1, module2) ...
+                    ts.createFunctionExpression(
+                    /*modifiers*/ undefined, 
+                    /*asteriskToken*/ undefined, 
+                    /*name*/ undefined, 
+                    /*typeParameters*/ undefined, [
+                        ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, "require"),
+                        ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, "exports")
+                    ].concat(importAliasNames), 
+                    /*type*/ undefined, transformAsynchronousModuleBody(node))
+                ])))
+            ]), 
+            /*location*/ node.statements));
+            ts.addEmitHelpers(updated, context.readEmitHelpers());
+            return updated;
+        }
+        /**
+         * Transforms a SourceFile into a UMD module.
+         *
+         * @param node The SourceFile node.
+         */
+        function transformUMDModule(node) {
+            var _a = collectAsynchronousDependencies(node, /*includeNonAmdDependencies*/ false), aliasedModuleNames = _a.aliasedModuleNames, unaliasedModuleNames = _a.unaliasedModuleNames, importAliasNames = _a.importAliasNames;
+            var moduleName = ts.tryGetModuleNameFromFile(node, host, compilerOptions);
+            var umdHeader = ts.createFunctionExpression(
+            /*modifiers*/ undefined, 
+            /*asteriskToken*/ undefined, 
+            /*name*/ undefined, 
+            /*typeParameters*/ undefined, [ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, "factory")], 
+            /*type*/ undefined, ts.setTextRange(ts.createBlock([
+                ts.createIf(ts.createLogicalAnd(ts.createTypeCheck(ts.createIdentifier("module"), "object"), ts.createTypeCheck(ts.createPropertyAccess(ts.createIdentifier("module"), "exports"), "object")), ts.createBlock([
+                    ts.createVariableStatement(
+                    /*modifiers*/ undefined, [
+                        ts.createVariableDeclaration("v", 
+                        /*type*/ undefined, ts.createCall(ts.createIdentifier("factory"), 
+                        /*typeArguments*/ undefined, [
+                            ts.createIdentifier("require"),
+                            ts.createIdentifier("exports")
+                        ]))
+                    ]),
+                    ts.setEmitFlags(ts.createIf(ts.createStrictInequality(ts.createIdentifier("v"), ts.createIdentifier("undefined")), ts.createStatement(ts.createAssignment(ts.createPropertyAccess(ts.createIdentifier("module"), "exports"), ts.createIdentifier("v")))), 1 /* SingleLine */)
+                ]), ts.createIf(ts.createLogicalAnd(ts.createTypeCheck(ts.createIdentifier("define"), "function"), ts.createPropertyAccess(ts.createIdentifier("define"), "amd")), ts.createBlock([
+                    ts.createStatement(ts.createCall(ts.createIdentifier("define"), 
+                    /*typeArguments*/ undefined, (moduleName ? [moduleName] : []).concat([
+                        ts.createArrayLiteral([
+                            ts.createLiteral("require"),
+                            ts.createLiteral("exports")
+                        ].concat(aliasedModuleNames, unaliasedModuleNames)),
+                        ts.createIdentifier("factory")
+                    ])))
+                ])))
+            ], 
+            /*multiLine*/ true), 
+            /*location*/ undefined));
+            // Create an updated SourceFile:
+            //
+            //  (function (factory) {
+            //      if (typeof module === "object" && typeof module.exports === "object") {
+            //          var v = factory(require, exports);
+            //          if (v !== undefined) module.exports = v;
+            //      }
+            //      else if (typeof define === 'function' && define.amd) {
+            //          define(["require", "exports"], factory);
+            //      }
+            //  })(function ...)
+            var updated = ts.updateSourceFileNode(node, ts.setTextRange(ts.createNodeArray([
+                ts.createStatement(ts.createCall(umdHeader, 
+                /*typeArguments*/ undefined, [
+                    // Add the module body function argument:
+                    //
+                    //     function (require, exports) ...
+                    ts.createFunctionExpression(
+                    /*modifiers*/ undefined, 
+                    /*asteriskToken*/ undefined, 
+                    /*name*/ undefined, 
+                    /*typeParameters*/ undefined, [
+                        ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, "require"),
+                        ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, "exports")
+                    ].concat(importAliasNames), 
+                    /*type*/ undefined, transformAsynchronousModuleBody(node))
+                ]))
+            ]), 
+            /*location*/ node.statements));
+            ts.addEmitHelpers(updated, context.readEmitHelpers());
+            return updated;
+        }
+        /**
+         * Collect the additional asynchronous dependencies for the module.
+         *
+         * @param node The source file.
+         * @param includeNonAmdDependencies A value indicating whether to include non-AMD dependencies.
+         */
+        function collectAsynchronousDependencies(node, includeNonAmdDependencies) {
+            // names of modules with corresponding parameter in the factory function
+            var aliasedModuleNames = [];
+            // names of modules with no corresponding parameters in factory function
+            var unaliasedModuleNames = [];
+            // names of the parameters in the factory function; these
+            // parameters need to match the indexes of the corresponding
+            // module names in aliasedModuleNames.
+            var importAliasNames = [];
+            // Fill in amd-dependency tags
+            for (var _i = 0, _a = node.amdDependencies; _i < _a.length; _i++) {
+                var amdDependency = _a[_i];
+                if (amdDependency.name) {
+                    aliasedModuleNames.push(ts.createLiteral(amdDependency.path));
+                    importAliasNames.push(ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, amdDependency.name));
+                }
+                else {
+                    unaliasedModuleNames.push(ts.createLiteral(amdDependency.path));
+                }
+            }
+            for (var _b = 0, _c = currentModuleInfo.externalImports; _b < _c.length; _b++) {
+                var importNode = _c[_b];
+                // Find the name of the external module
+                var externalModuleName = ts.getExternalModuleNameLiteral(importNode, currentSourceFile, host, resolver, compilerOptions);
+                // Find the name of the module alias, if there is one
+                var importAliasName = ts.getLocalNameForExternalImport(importNode, currentSourceFile);
+                // It is possible that externalModuleName is undefined if it is not string literal.
+                // This can happen in the invalid import syntax.
+                // E.g : "import * from alias from 'someLib';"
+                if (externalModuleName) {
+                    if (includeNonAmdDependencies && importAliasName) {
+                        // Set emitFlags on the name of the classDeclaration
+                        // This is so that when printer will not substitute the identifier
+                        ts.setEmitFlags(importAliasName, 4 /* NoSubstitution */);
+                        aliasedModuleNames.push(externalModuleName);
+                        importAliasNames.push(ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, importAliasName));
+                    }
+                    else {
+                        unaliasedModuleNames.push(externalModuleName);
+                    }
+                }
+            }
+            return { aliasedModuleNames: aliasedModuleNames, unaliasedModuleNames: unaliasedModuleNames, importAliasNames: importAliasNames };
+        }
+        function getAMDImportExpressionForImport(node) {
+            if (ts.isImportEqualsDeclaration(node) || ts.isExportDeclaration(node) || !ts.getExternalModuleNameLiteral(node, currentSourceFile, host, resolver, compilerOptions)) {
+                return undefined;
+            }
+            var name = ts.getLocalNameForExternalImport(node, currentSourceFile); // TODO: GH#18217
+            var expr = getHelperExpressionForImport(node, name);
+            if (expr === name) {
+                return undefined;
+            }
+            return ts.createStatement(ts.createAssignment(name, expr));
+        }
+        /**
+         * Transforms a SourceFile into an AMD or UMD module body.
+         *
+         * @param node The SourceFile node.
+         */
+        function transformAsynchronousModuleBody(node) {
+            startLexicalEnvironment();
+            var statements = [];
+            var statementOffset = ts.addPrologue(statements, node.statements, /*ensureUseStrict*/ !compilerOptions.noImplicitUseStrict, sourceElementVisitor);
+            if (shouldEmitUnderscoreUnderscoreESModule()) {
+                ts.append(statements, createUnderscoreUnderscoreESModule());
+            }
+            // Visit each statement of the module body.
+            ts.append(statements, ts.visitNode(currentModuleInfo.externalHelpersImportDeclaration, sourceElementVisitor, ts.isStatement));
+            if (moduleKind === ts.ModuleKind.AMD) {
+                ts.addRange(statements, ts.mapDefined(currentModuleInfo.externalImports, getAMDImportExpressionForImport));
+            }
+            ts.addRange(statements, ts.visitNodes(node.statements, sourceElementVisitor, ts.isStatement, statementOffset));
+            // Append the 'export =' statement if provided.
+            addExportEqualsIfNeeded(statements, /*emitAsReturn*/ true);
+            // End the lexical environment for the module body
+            // and merge any new lexical declarations.
+            ts.prependStatements(statements, endLexicalEnvironment());
+            var body = ts.createBlock(statements, /*multiLine*/ true);
+            if (currentModuleInfo.hasExportStarsToExportValues && !compilerOptions.importHelpers) {
+                // If we have any `export * from ...` declarations
+                // we need to inform the emitter to add the __export helper.
+                ts.addEmitHelper(body, exportStarHelper);
+            }
+            if (needUMDDynamicImportHelper) {
+                ts.addEmitHelper(body, dynamicImportUMDHelper);
+            }
+            return body;
+        }
+        /**
+         * Adds the down-level representation of `export=` to the statement list if one exists
+         * in the source file.
+         *
+         * @param statements The Statement list to modify.
+         * @param emitAsReturn A value indicating whether to emit the `export=` statement as a
+         * return statement.
+         */
+        function addExportEqualsIfNeeded(statements, emitAsReturn) {
+            if (currentModuleInfo.exportEquals) {
+                var expressionResult = ts.visitNode(currentModuleInfo.exportEquals.expression, moduleExpressionElementVisitor);
+                if (expressionResult) {
+                    if (emitAsReturn) {
+                        var statement = ts.createReturn(expressionResult);
+                        ts.setTextRange(statement, currentModuleInfo.exportEquals);
+                        ts.setEmitFlags(statement, 384 /* NoTokenSourceMaps */ | 1536 /* NoComments */);
+                        statements.push(statement);
+                    }
+                    else {
+                        var statement = ts.createStatement(ts.createAssignment(ts.createPropertyAccess(ts.createIdentifier("module"), "exports"), expressionResult));
+                        ts.setTextRange(statement, currentModuleInfo.exportEquals);
+                        ts.setEmitFlags(statement, 1536 /* NoComments */);
+                        statements.push(statement);
+                    }
+                }
+            }
+        }
+        //
+        // Top-Level Source Element Visitors
+        //
+        /**
+         * Visits a node at the top level of the source file.
+         *
+         * @param node The node to visit.
+         */
+        function sourceElementVisitor(node) {
+            switch (node.kind) {
+                case 244 /* ImportDeclaration */:
+                    return visitImportDeclaration(node);
+                case 243 /* ImportEqualsDeclaration */:
+                    return visitImportEqualsDeclaration(node);
+                case 250 /* ExportDeclaration */:
+                    return visitExportDeclaration(node);
+                case 249 /* ExportAssignment */:
+                    return visitExportAssignment(node);
+                case 214 /* VariableStatement */:
+                    return visitVariableStatement(node);
+                case 234 /* FunctionDeclaration */:
+                    return visitFunctionDeclaration(node);
+                case 235 /* ClassDeclaration */:
+                    return visitClassDeclaration(node);
+                case 303 /* MergeDeclarationMarker */:
+                    return visitMergeDeclarationMarker(node);
+                case 304 /* EndOfDeclarationMarker */:
+                    return visitEndOfDeclarationMarker(node);
+                default:
+                    return ts.visitEachChild(node, moduleExpressionElementVisitor, context);
+            }
+        }
+        function moduleExpressionElementVisitor(node) {
+            // This visitor does not need to descend into the tree if there is no dynamic import or destructuring assignment,
+            // as export/import statements are only transformed at the top level of a file.
+            if (!(node.transformFlags & 67108864 /* ContainsDynamicImport */) && !(node.transformFlags & 2048 /* ContainsDestructuringAssignment */)) {
+                return node;
+            }
+            if (ts.isImportCall(node)) {
+                return visitImportCallExpression(node);
+            }
+            else if (node.transformFlags & 1024 /* DestructuringAssignment */ && ts.isBinaryExpression(node)) {
+                return visitDestructuringAssignment(node);
+            }
+            else {
+                return ts.visitEachChild(node, moduleExpressionElementVisitor, context);
+            }
+        }
+        function destructuringNeedsFlattening(node) {
+            if (ts.isObjectLiteralExpression(node)) {
+                for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
+                    var elem = _a[_i];
+                    switch (elem.kind) {
+                        case 270 /* PropertyAssignment */:
+                            if (destructuringNeedsFlattening(elem.initializer)) {
+                                return true;
+                            }
+                            break;
+                        case 271 /* ShorthandPropertyAssignment */:
+                            if (destructuringNeedsFlattening(elem.name)) {
+                                return true;
+                            }
+                            break;
+                        case 272 /* SpreadAssignment */:
+                            if (destructuringNeedsFlattening(elem.expression)) {
+                                return true;
+                            }
+                            break;
+                        case 154 /* MethodDeclaration */:
+                        case 156 /* GetAccessor */:
+                        case 157 /* SetAccessor */:
+                            return false;
+                        default: ts.Debug.assertNever(elem, "Unhandled object member kind");
+                    }
+                }
+            }
+            else if (ts.isArrayLiteralExpression(node)) {
+                for (var _b = 0, _c = node.elements; _b < _c.length; _b++) {
+                    var elem = _c[_b];
+                    if (ts.isSpreadElement(elem)) {
+                        if (destructuringNeedsFlattening(elem.expression)) {
+                            return true;
+                        }
+                    }
+                    else if (destructuringNeedsFlattening(elem)) {
+                        return true;
+                    }
+                }
+            }
+            else if (ts.isIdentifier(node)) {
+                return ts.length(getExports(node)) > (ts.isExportName(node) ? 1 : 0);
+            }
+            return false;
+        }
+        function visitDestructuringAssignment(node) {
+            if (destructuringNeedsFlattening(node.left)) {
+                return ts.flattenDestructuringAssignment(node, moduleExpressionElementVisitor, context, 0 /* All */, /*needsValue*/ false, createAllExportExpressions);
+            }
+            return ts.visitEachChild(node, moduleExpressionElementVisitor, context);
+        }
+        function visitImportCallExpression(node) {
+            var argument = ts.visitNode(ts.firstOrUndefined(node.arguments), moduleExpressionElementVisitor);
+            var containsLexicalThis = !!(node.transformFlags & 16384 /* ContainsLexicalThis */);
+            switch (compilerOptions.module) {
+                case ts.ModuleKind.AMD:
+                    return createImportCallExpressionAMD(argument, containsLexicalThis);
+                case ts.ModuleKind.UMD:
+                    return createImportCallExpressionUMD(argument, containsLexicalThis);
+                case ts.ModuleKind.CommonJS:
+                default:
+                    return createImportCallExpressionCommonJS(argument, containsLexicalThis);
+            }
+        }
+        function createImportCallExpressionUMD(arg, containsLexicalThis) {
+            // (function (factory) {
+            //      ... (regular UMD)
+            // }
+            // })(function (require, exports, useSyncRequire) {
+            //      "use strict";
+            //      Object.defineProperty(exports, "__esModule", { value: true });
+            //      var __syncRequire = typeof module === "object" && typeof module.exports === "object";
+            //      var __resolved = new Promise(function (resolve) { resolve(); });
+            //      .....
+            //      __syncRequire
+            //          ? __resolved.then(function () { return require(x); }) /*CommonJs Require*/
+            //          : new Promise(function (_a, _b) { require([x], _a, _b); }); /*Amd Require*/
+            // });
+            needUMDDynamicImportHelper = true;
+            if (ts.isSimpleCopiableExpression(arg)) {
+                var argClone = ts.isGeneratedIdentifier(arg) ? arg : ts.isStringLiteral(arg) ? ts.createLiteral(arg) : ts.setEmitFlags(ts.setTextRange(ts.getSynthesizedClone(arg), arg), 1536 /* NoComments */);
+                return ts.createConditional(
+                /*condition*/ ts.createIdentifier("__syncRequire"), 
+                /*whenTrue*/ createImportCallExpressionCommonJS(arg, containsLexicalThis), 
+                /*whenFalse*/ createImportCallExpressionAMD(argClone, containsLexicalThis));
+            }
+            else {
+                var temp = ts.createTempVariable(hoistVariableDeclaration);
+                return ts.createComma(ts.createAssignment(temp, arg), ts.createConditional(
+                /*condition*/ ts.createIdentifier("__syncRequire"), 
+                /*whenTrue*/ createImportCallExpressionCommonJS(temp, containsLexicalThis), 
+                /*whenFalse*/ createImportCallExpressionAMD(temp, containsLexicalThis)));
+            }
+        }
+        function createImportCallExpressionAMD(arg, containsLexicalThis) {
+            // improt("./blah")
+            // emit as
+            // define(["require", "exports", "blah"], function (require, exports) {
+            //     ...
+            //     new Promise(function (_a, _b) { require([x], _a, _b); }); /*Amd Require*/
+            // });
+            var resolve = ts.createUniqueName("resolve");
+            var reject = ts.createUniqueName("reject");
+            var parameters = [
+                ts.createParameter(/*decorator*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, /*name*/ resolve),
+                ts.createParameter(/*decorator*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, /*name*/ reject)
+            ];
+            var body = ts.createBlock([
+                ts.createStatement(ts.createCall(ts.createIdentifier("require"), 
+                /*typeArguments*/ undefined, [ts.createArrayLiteral([arg || ts.createOmittedExpression()]), resolve, reject]))
+            ]);
+            var func;
+            if (languageVersion >= 2 /* ES2015 */) {
+                func = ts.createArrowFunction(
+                /*modifiers*/ undefined, 
+                /*typeParameters*/ undefined, parameters, 
+                /*type*/ undefined, 
+                /*equalsGreaterThanToken*/ undefined, body);
+            }
+            else {
+                func = ts.createFunctionExpression(
+                /*modifiers*/ undefined, 
+                /*asteriskToken*/ undefined, 
+                /*name*/ undefined, 
+                /*typeParameters*/ undefined, parameters, 
+                /*type*/ undefined, body);
+                // if there is a lexical 'this' in the import call arguments, ensure we indicate
+                // that this new function expression indicates it captures 'this' so that the
+                // es2015 transformer will properly substitute 'this' with '_this'.
+                if (containsLexicalThis) {
+                    ts.setEmitFlags(func, 8 /* CapturesThis */);
+                }
+            }
+            var promise = ts.createNew(ts.createIdentifier("Promise"), /*typeArguments*/ undefined, [func]);
+            if (compilerOptions.esModuleInterop) {
+                context.requestEmitHelper(importStarHelper);
+                return ts.createCall(ts.createPropertyAccess(promise, ts.createIdentifier("then")), /*typeArguments*/ undefined, [ts.getHelperName("__importStar")]);
+            }
+            return promise;
+        }
+        function createImportCallExpressionCommonJS(arg, containsLexicalThis) {
+            // import("./blah")
+            // emit as
+            // Promise.resolve().then(function () { return require(x); }) /*CommonJs Require*/
+            // We have to wrap require in then callback so that require is done in asynchronously
+            // if we simply do require in resolve callback in Promise constructor. We will execute the loading immediately
+            var promiseResolveCall = ts.createCall(ts.createPropertyAccess(ts.createIdentifier("Promise"), "resolve"), /*typeArguments*/ undefined, /*argumentsArray*/ []);
+            var requireCall = ts.createCall(ts.createIdentifier("require"), /*typeArguments*/ undefined, arg ? [arg] : []);
+            if (compilerOptions.esModuleInterop) {
+                context.requestEmitHelper(importStarHelper);
+                requireCall = ts.createCall(ts.getHelperName("__importStar"), /*typeArguments*/ undefined, [requireCall]);
+            }
+            var func;
+            if (languageVersion >= 2 /* ES2015 */) {
+                func = ts.createArrowFunction(
+                /*modifiers*/ undefined, 
+                /*typeParameters*/ undefined, 
+                /*parameters*/ [], 
+                /*type*/ undefined, 
+                /*equalsGreaterThanToken*/ undefined, requireCall);
+            }
+            else {
+                func = ts.createFunctionExpression(
+                /*modifiers*/ undefined, 
+                /*asteriskToken*/ undefined, 
+                /*name*/ undefined, 
+                /*typeParameters*/ undefined, 
+                /*parameters*/ [], 
+                /*type*/ undefined, ts.createBlock([ts.createReturn(requireCall)]));
+                // if there is a lexical 'this' in the import call arguments, ensure we indicate
+                // that this new function expression indicates it captures 'this' so that the
+                // es2015 transformer will properly substitute 'this' with '_this'.
+                if (containsLexicalThis) {
+                    ts.setEmitFlags(func, 8 /* CapturesThis */);
+                }
+            }
+            return ts.createCall(ts.createPropertyAccess(promiseResolveCall, "then"), /*typeArguments*/ undefined, [func]);
+        }
+        function getHelperExpressionForImport(node, innerExpr) {
+            if (!compilerOptions.esModuleInterop || ts.getEmitFlags(node) & 67108864 /* NeverApplyImportHelper */) {
+                return innerExpr;
+            }
+            if (ts.getImportNeedsImportStarHelper(node)) {
+                context.requestEmitHelper(importStarHelper);
+                return ts.createCall(ts.getHelperName("__importStar"), /*typeArguments*/ undefined, [innerExpr]);
+            }
+            if (ts.getImportNeedsImportDefaultHelper(node)) {
+                context.requestEmitHelper(importDefaultHelper);
+                return ts.createCall(ts.getHelperName("__importDefault"), /*typeArguments*/ undefined, [innerExpr]);
+            }
+            return innerExpr;
+        }
+        /**
+         * Visits an ImportDeclaration node.
+         *
+         * @param node The node to visit.
+         */
+        function visitImportDeclaration(node) {
+            var statements;
+            var namespaceDeclaration = ts.getNamespaceDeclarationNode(node);
+            if (moduleKind !== ts.ModuleKind.AMD) {
+                if (!node.importClause) {
+                    // import "mod";
+                    return ts.setTextRange(ts.createStatement(createRequireCall(node)), node);
+                }
+                else {
+                    var variables = [];
+                    if (namespaceDeclaration && !ts.isDefaultImport(node)) {
+                        // import * as n from "mod";
+                        variables.push(ts.createVariableDeclaration(ts.getSynthesizedClone(namespaceDeclaration.name), 
+                        /*type*/ undefined, getHelperExpressionForImport(node, createRequireCall(node))));
+                    }
+                    else {
+                        // import d from "mod";
+                        // import { x, y } from "mod";
+                        // import d, { x, y } from "mod";
+                        // import d, * as n from "mod";
+                        variables.push(ts.createVariableDeclaration(ts.getGeneratedNameForNode(node), 
+                        /*type*/ undefined, getHelperExpressionForImport(node, createRequireCall(node))));
+                        if (namespaceDeclaration && ts.isDefaultImport(node)) {
+                            variables.push(ts.createVariableDeclaration(ts.getSynthesizedClone(namespaceDeclaration.name), 
+                            /*type*/ undefined, ts.getGeneratedNameForNode(node)));
+                        }
+                    }
+                    statements = ts.append(statements, ts.setTextRange(ts.createVariableStatement(
+                    /*modifiers*/ undefined, ts.createVariableDeclarationList(variables, languageVersion >= 2 /* ES2015 */ ? 2 /* Const */ : 0 /* None */)), 
+                    /*location*/ node));
+                }
+            }
+            else if (namespaceDeclaration && ts.isDefaultImport(node)) {
+                // import d, * as n from "mod";
+                statements = ts.append(statements, ts.createVariableStatement(
+                /*modifiers*/ undefined, ts.createVariableDeclarationList([
+                    ts.setTextRange(ts.createVariableDeclaration(ts.getSynthesizedClone(namespaceDeclaration.name), 
+                    /*type*/ undefined, ts.getGeneratedNameForNode(node)), 
+                    /*location*/ node)
+                ], languageVersion >= 2 /* ES2015 */ ? 2 /* Const */ : 0 /* None */)));
+            }
+            if (hasAssociatedEndOfDeclarationMarker(node)) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                var id = ts.getOriginalNodeId(node);
+                deferredExports[id] = appendExportsOfImportDeclaration(deferredExports[id], node);
+            }
+            else {
+                statements = appendExportsOfImportDeclaration(statements, node);
+            }
+            return ts.singleOrMany(statements);
+        }
+        /**
+         * Creates a `require()` call to import an external module.
+         *
+         * @param importNode The declararation to import.
+         */
+        function createRequireCall(importNode) {
+            var moduleName = ts.getExternalModuleNameLiteral(importNode, currentSourceFile, host, resolver, compilerOptions);
+            var args = [];
+            if (moduleName) {
+                args.push(moduleName);
+            }
+            return ts.createCall(ts.createIdentifier("require"), /*typeArguments*/ undefined, args);
+        }
+        /**
+         * Visits an ImportEqualsDeclaration node.
+         *
+         * @param node The node to visit.
+         */
+        function visitImportEqualsDeclaration(node) {
+            ts.Debug.assert(ts.isExternalModuleImportEqualsDeclaration(node), "import= for internal module references should be handled in an earlier transformer.");
+            var statements;
+            if (moduleKind !== ts.ModuleKind.AMD) {
+                if (ts.hasModifier(node, 1 /* Export */)) {
+                    statements = ts.append(statements, ts.setTextRange(ts.createStatement(createExportExpression(node.name, createRequireCall(node))), node));
+                }
+                else {
+                    statements = ts.append(statements, ts.setTextRange(ts.createVariableStatement(
+                    /*modifiers*/ undefined, ts.createVariableDeclarationList([
+                        ts.createVariableDeclaration(ts.getSynthesizedClone(node.name), 
+                        /*type*/ undefined, createRequireCall(node))
+                    ], 
+                    /*flags*/ languageVersion >= 2 /* ES2015 */ ? 2 /* Const */ : 0 /* None */)), node));
+                }
+            }
+            else {
+                if (ts.hasModifier(node, 1 /* Export */)) {
+                    statements = ts.append(statements, ts.setTextRange(ts.createStatement(createExportExpression(ts.getExportName(node), ts.getLocalName(node))), node));
+                }
+            }
+            if (hasAssociatedEndOfDeclarationMarker(node)) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                var id = ts.getOriginalNodeId(node);
+                deferredExports[id] = appendExportsOfImportEqualsDeclaration(deferredExports[id], node);
+            }
+            else {
+                statements = appendExportsOfImportEqualsDeclaration(statements, node);
+            }
+            return ts.singleOrMany(statements);
+        }
+        /**
+         * Visits an ExportDeclaration node.
+         *
+         * @param The node to visit.
+         */
+        function visitExportDeclaration(node) {
+            if (!node.moduleSpecifier) {
+                // Elide export declarations with no module specifier as they are handled
+                // elsewhere.
+                return undefined;
+            }
+            var generatedName = ts.getGeneratedNameForNode(node);
+            if (node.exportClause) {
+                var statements = [];
+                // export { x, y } from "mod";
+                if (moduleKind !== ts.ModuleKind.AMD) {
+                    statements.push(ts.setTextRange(ts.createVariableStatement(
+                    /*modifiers*/ undefined, ts.createVariableDeclarationList([
+                        ts.createVariableDeclaration(generatedName, 
+                        /*type*/ undefined, createRequireCall(node))
+                    ])), 
+                    /*location*/ node));
+                }
+                for (var _i = 0, _a = node.exportClause.elements; _i < _a.length; _i++) {
+                    var specifier = _a[_i];
+                    var exportedValue = ts.createPropertyAccess(generatedName, specifier.propertyName || specifier.name);
+                    statements.push(ts.setTextRange(ts.createStatement(createExportExpression(ts.getExportName(specifier), exportedValue)), specifier));
+                }
+                return ts.singleOrMany(statements);
+            }
+            else {
+                // export * from "mod";
+                return ts.setTextRange(ts.createStatement(createExportStarHelper(context, moduleKind !== ts.ModuleKind.AMD ? createRequireCall(node) : generatedName)), node);
+            }
+        }
+        /**
+         * Visits an ExportAssignment node.
+         *
+         * @param node The node to visit.
+         */
+        function visitExportAssignment(node) {
+            if (node.isExportEquals) {
+                return undefined;
+            }
+            var statements;
+            var original = node.original;
+            if (original && hasAssociatedEndOfDeclarationMarker(original)) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                var id = ts.getOriginalNodeId(node);
+                deferredExports[id] = appendExportStatement(deferredExports[id], ts.createIdentifier("default"), ts.visitNode(node.expression, moduleExpressionElementVisitor), /*location*/ node, /*allowComments*/ true);
+            }
+            else {
+                statements = appendExportStatement(statements, ts.createIdentifier("default"), ts.visitNode(node.expression, moduleExpressionElementVisitor), /*location*/ node, /*allowComments*/ true);
+            }
+            return ts.singleOrMany(statements);
+        }
+        /**
+         * Visits a FunctionDeclaration node.
+         *
+         * @param node The node to visit.
+         */
+        function visitFunctionDeclaration(node) {
+            var statements;
+            if (ts.hasModifier(node, 1 /* Export */)) {
+                statements = ts.append(statements, ts.setOriginalNode(ts.setTextRange(ts.createFunctionDeclaration(
+                /*decorators*/ undefined, ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), node.asteriskToken, ts.getDeclarationName(node, /*allowComments*/ true, /*allowSourceMaps*/ true), 
+                /*typeParameters*/ undefined, ts.visitNodes(node.parameters, moduleExpressionElementVisitor), 
+                /*type*/ undefined, ts.visitEachChild(node.body, moduleExpressionElementVisitor, context)), 
+                /*location*/ node), 
+                /*original*/ node));
+            }
+            else {
+                statements = ts.append(statements, ts.visitEachChild(node, moduleExpressionElementVisitor, context));
+            }
+            if (hasAssociatedEndOfDeclarationMarker(node)) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                var id = ts.getOriginalNodeId(node);
+                deferredExports[id] = appendExportsOfHoistedDeclaration(deferredExports[id], node);
+            }
+            else {
+                statements = appendExportsOfHoistedDeclaration(statements, node);
+            }
+            return ts.singleOrMany(statements);
+        }
+        /**
+         * Visits a ClassDeclaration node.
+         *
+         * @param node The node to visit.
+         */
+        function visitClassDeclaration(node) {
+            var statements;
+            if (ts.hasModifier(node, 1 /* Export */)) {
+                statements = ts.append(statements, ts.setOriginalNode(ts.setTextRange(ts.createClassDeclaration(
+                /*decorators*/ undefined, ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), ts.getDeclarationName(node, /*allowComments*/ true, /*allowSourceMaps*/ true), 
+                /*typeParameters*/ undefined, ts.visitNodes(node.heritageClauses, moduleExpressionElementVisitor), ts.visitNodes(node.members, moduleExpressionElementVisitor)), node), node));
+            }
+            else {
+                statements = ts.append(statements, ts.visitEachChild(node, moduleExpressionElementVisitor, context));
+            }
+            if (hasAssociatedEndOfDeclarationMarker(node)) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                var id = ts.getOriginalNodeId(node);
+                deferredExports[id] = appendExportsOfHoistedDeclaration(deferredExports[id], node);
+            }
+            else {
+                statements = appendExportsOfHoistedDeclaration(statements, node);
+            }
+            return ts.singleOrMany(statements);
+        }
+        /**
+         * Visits a VariableStatement node.
+         *
+         * @param node The node to visit.
+         */
+        function visitVariableStatement(node) {
+            var statements;
+            var variables;
+            var expressions;
+            if (ts.hasModifier(node, 1 /* Export */)) {
+                var modifiers = void 0;
+                // If we're exporting these variables, then these just become assignments to 'exports.x'.
+                // We only want to emit assignments for variables with initializers.
+                for (var _i = 0, _a = node.declarationList.declarations; _i < _a.length; _i++) {
+                    var variable = _a[_i];
+                    if (ts.isIdentifier(variable.name) && ts.isLocalName(variable.name)) {
+                        if (!modifiers) {
+                            modifiers = ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier);
+                        }
+                        variables = ts.append(variables, variable);
+                    }
+                    else if (variable.initializer) {
+                        expressions = ts.append(expressions, transformInitializedVariable(variable));
+                    }
+                }
+                if (variables) {
+                    statements = ts.append(statements, ts.updateVariableStatement(node, modifiers, ts.updateVariableDeclarationList(node.declarationList, variables)));
+                }
+                if (expressions) {
+                    statements = ts.append(statements, ts.setTextRange(ts.createStatement(ts.inlineExpressions(expressions)), node));
+                }
+            }
+            else {
+                statements = ts.append(statements, ts.visitEachChild(node, moduleExpressionElementVisitor, context));
+            }
+            if (hasAssociatedEndOfDeclarationMarker(node)) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                var id = ts.getOriginalNodeId(node);
+                deferredExports[id] = appendExportsOfVariableStatement(deferredExports[id], node);
+            }
+            else {
+                statements = appendExportsOfVariableStatement(statements, node);
+            }
+            return ts.singleOrMany(statements);
+        }
+        function createAllExportExpressions(name, value, location) {
+            var exportedNames = getExports(name);
+            if (exportedNames) {
+                // For each additional export of the declaration, apply an export assignment.
+                var expression = ts.isExportName(name) ? value : ts.createAssignment(name, value);
+                for (var _i = 0, exportedNames_1 = exportedNames; _i < exportedNames_1.length; _i++) {
+                    var exportName = exportedNames_1[_i];
+                    // Mark the node to prevent triggering substitution.
+                    ts.setEmitFlags(expression, 4 /* NoSubstitution */);
+                    expression = createExportExpression(exportName, expression, /*location*/ location);
+                }
+                return expression;
+            }
+            return ts.createAssignment(name, value);
+        }
+        /**
+         * Transforms an exported variable with an initializer into an expression.
+         *
+         * @param node The node to transform.
+         */
+        function transformInitializedVariable(node) {
+            if (ts.isBindingPattern(node.name)) {
+                return ts.flattenDestructuringAssignment(ts.visitNode(node, moduleExpressionElementVisitor), 
+                /*visitor*/ undefined, context, 0 /* All */, 
+                /*needsValue*/ false, createAllExportExpressions);
+            }
+            else {
+                return ts.createAssignment(ts.setTextRange(ts.createPropertyAccess(ts.createIdentifier("exports"), node.name), 
+                /*location*/ node.name), ts.visitNode(node.initializer, moduleExpressionElementVisitor));
+            }
+        }
+        /**
+         * Visits a MergeDeclarationMarker used as a placeholder for the beginning of a merged
+         * and transformed declaration.
+         *
+         * @param node The node to visit.
+         */
+        function visitMergeDeclarationMarker(node) {
+            // For an EnumDeclaration or ModuleDeclaration that merges with a preceeding
+            // declaration we do not emit a leading variable declaration. To preserve the
+            // begin/end semantics of the declararation and to properly handle exports
+            // we wrapped the leading variable declaration in a `MergeDeclarationMarker`.
+            //
+            // To balance the declaration, add the exports of the elided variable
+            // statement.
+            if (hasAssociatedEndOfDeclarationMarker(node) && node.original.kind === 214 /* VariableStatement */) {
+                var id = ts.getOriginalNodeId(node);
+                deferredExports[id] = appendExportsOfVariableStatement(deferredExports[id], node.original);
+            }
+            return node;
+        }
+        /**
+         * Determines whether a node has an associated EndOfDeclarationMarker.
+         *
+         * @param node The node to test.
+         */
+        function hasAssociatedEndOfDeclarationMarker(node) {
+            return (ts.getEmitFlags(node) & 4194304 /* HasEndOfDeclarationMarker */) !== 0;
+        }
+        /**
+         * Visits a DeclarationMarker used as a placeholder for the end of a transformed
+         * declaration.
+         *
+         * @param node The node to visit.
+         */
+        function visitEndOfDeclarationMarker(node) {
+            // For some transformations we emit an `EndOfDeclarationMarker` to mark the actual
+            // end of the transformed declaration. We use this marker to emit any deferred exports
+            // of the declaration.
+            var id = ts.getOriginalNodeId(node);
+            var statements = deferredExports[id];
+            if (statements) {
+                delete deferredExports[id];
+                return ts.append(statements, node);
+            }
+            return node;
+        }
+        /**
+         * Appends the exports of an ImportDeclaration to a statement list, returning the
+         * statement list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param decl The declaration whose exports are to be recorded.
+         */
+        function appendExportsOfImportDeclaration(statements, decl) {
+            if (currentModuleInfo.exportEquals) {
+                return statements;
+            }
+            var importClause = decl.importClause;
+            if (!importClause) {
+                return statements;
+            }
+            if (importClause.name) {
+                statements = appendExportsOfDeclaration(statements, importClause);
+            }
+            var namedBindings = importClause.namedBindings;
+            if (namedBindings) {
+                switch (namedBindings.kind) {
+                    case 246 /* NamespaceImport */:
+                        statements = appendExportsOfDeclaration(statements, namedBindings);
+                        break;
+                    case 247 /* NamedImports */:
+                        for (var _i = 0, _a = namedBindings.elements; _i < _a.length; _i++) {
+                            var importBinding = _a[_i];
+                            statements = appendExportsOfDeclaration(statements, importBinding);
+                        }
+                        break;
+                }
+            }
+            return statements;
+        }
+        /**
+         * Appends the exports of an ImportEqualsDeclaration to a statement list, returning the
+         * statement list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param decl The declaration whose exports are to be recorded.
+         */
+        function appendExportsOfImportEqualsDeclaration(statements, decl) {
+            if (currentModuleInfo.exportEquals) {
+                return statements;
+            }
+            return appendExportsOfDeclaration(statements, decl);
+        }
+        /**
+         * Appends the exports of a VariableStatement to a statement list, returning the statement
+         * list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param node The VariableStatement whose exports are to be recorded.
+         */
+        function appendExportsOfVariableStatement(statements, node) {
+            if (currentModuleInfo.exportEquals) {
+                return statements;
+            }
+            for (var _i = 0, _a = node.declarationList.declarations; _i < _a.length; _i++) {
+                var decl = _a[_i];
+                statements = appendExportsOfBindingElement(statements, decl);
+            }
+            return statements;
+        }
+        /**
+         * Appends the exports of a VariableDeclaration or BindingElement to a statement list,
+         * returning the statement list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param decl The declaration whose exports are to be recorded.
+         */
+        function appendExportsOfBindingElement(statements, decl) {
+            if (currentModuleInfo.exportEquals) {
+                return statements;
+            }
+            if (ts.isBindingPattern(decl.name)) {
+                for (var _i = 0, _a = decl.name.elements; _i < _a.length; _i++) {
+                    var element = _a[_i];
+                    if (!ts.isOmittedExpression(element)) {
+                        statements = appendExportsOfBindingElement(statements, element);
+                    }
+                }
+            }
+            else if (!ts.isGeneratedIdentifier(decl.name)) {
+                statements = appendExportsOfDeclaration(statements, decl);
+            }
+            return statements;
+        }
+        /**
+         * Appends the exports of a ClassDeclaration or FunctionDeclaration to a statement list,
+         * returning the statement list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param decl The declaration whose exports are to be recorded.
+         */
+        function appendExportsOfHoistedDeclaration(statements, decl) {
+            if (currentModuleInfo.exportEquals) {
+                return statements;
+            }
+            if (ts.hasModifier(decl, 1 /* Export */)) {
+                var exportName = ts.hasModifier(decl, 512 /* Default */) ? ts.createIdentifier("default") : ts.getDeclarationName(decl);
+                statements = appendExportStatement(statements, exportName, ts.getLocalName(decl), /*location*/ decl);
+            }
+            if (decl.name) {
+                statements = appendExportsOfDeclaration(statements, decl);
+            }
+            return statements;
+        }
+        /**
+         * Appends the exports of a declaration to a statement list, returning the statement list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param decl The declaration to export.
+         */
+        function appendExportsOfDeclaration(statements, decl) {
+            var name = ts.getDeclarationName(decl);
+            var exportSpecifiers = currentModuleInfo.exportSpecifiers.get(ts.idText(name));
+            if (exportSpecifiers) {
+                for (var _i = 0, exportSpecifiers_1 = exportSpecifiers; _i < exportSpecifiers_1.length; _i++) {
+                    var exportSpecifier = exportSpecifiers_1[_i];
+                    statements = appendExportStatement(statements, exportSpecifier.name, name, /*location*/ exportSpecifier.name);
+                }
+            }
+            return statements;
+        }
+        /**
+         * Appends the down-level representation of an export to a statement list, returning the
+         * statement list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param exportName The name of the export.
+         * @param expression The expression to export.
+         * @param location The location to use for source maps and comments for the export.
+         * @param allowComments Whether to allow comments on the export.
+         */
+        function appendExportStatement(statements, exportName, expression, location, allowComments) {
+            statements = ts.append(statements, createExportStatement(exportName, expression, location, allowComments));
+            return statements;
+        }
+        function createUnderscoreUnderscoreESModule() {
+            var statement;
+            if (languageVersion === 0 /* ES3 */) {
+                statement = ts.createStatement(createExportExpression(ts.createIdentifier("__esModule"), ts.createLiteral(/*value*/ true)));
+            }
+            else {
+                statement = ts.createStatement(ts.createCall(ts.createPropertyAccess(ts.createIdentifier("Object"), "defineProperty"), 
+                /*typeArguments*/ undefined, [
+                    ts.createIdentifier("exports"),
+                    ts.createLiteral("__esModule"),
+                    ts.createObjectLiteral([
+                        ts.createPropertyAssignment("value", ts.createLiteral(/*value*/ true))
+                    ])
+                ]));
+            }
+            ts.setEmitFlags(statement, 1048576 /* CustomPrologue */);
+            return statement;
+        }
+        /**
+         * Creates a call to the current file's export function to export a value.
+         *
+         * @param name The bound name of the export.
+         * @param value The exported value.
+         * @param location The location to use for source maps and comments for the export.
+         * @param allowComments An optional value indicating whether to emit comments for the statement.
+         */
+        function createExportStatement(name, value, location, allowComments) {
+            var statement = ts.setTextRange(ts.createStatement(createExportExpression(name, value)), location);
+            ts.startOnNewLine(statement);
+            if (!allowComments) {
+                ts.setEmitFlags(statement, 1536 /* NoComments */);
+            }
+            return statement;
+        }
+        /**
+         * Creates a call to the current file's export function to export a value.
+         *
+         * @param name The bound name of the export.
+         * @param value The exported value.
+         * @param location The location to use for source maps and comments for the export.
+         */
+        function createExportExpression(name, value, location) {
+            return ts.setTextRange(ts.createAssignment(ts.createPropertyAccess(ts.createIdentifier("exports"), ts.getSynthesizedClone(name)), value), location);
+        }
+        //
+        // Modifier Visitors
+        //
+        /**
+         * Visit nodes to elide module-specific modifiers.
+         *
+         * @param node The node to visit.
+         */
+        function modifierVisitor(node) {
+            // Elide module-specific modifiers.
+            switch (node.kind) {
+                case 84 /* ExportKeyword */:
+                case 79 /* DefaultKeyword */:
+                    return undefined;
+            }
+            return node;
+        }
+        //
+        // Emit Notification
+        //
+        /**
+         * Hook for node emit notifications.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to emit.
+         * @param emit A callback used to emit the node in the printer.
+         */
+        function onEmitNode(hint, node, emitCallback) {
+            if (node.kind === 274 /* SourceFile */) {
+                currentSourceFile = node;
+                currentModuleInfo = moduleInfoMap[ts.getOriginalNodeId(currentSourceFile)];
+                noSubstitution = [];
+                previousOnEmitNode(hint, node, emitCallback);
+                currentSourceFile = undefined;
+                currentModuleInfo = undefined;
+                noSubstitution = undefined;
+            }
+            else {
+                previousOnEmitNode(hint, node, emitCallback);
+            }
+        }
+        //
+        // Substitutions
+        //
+        /**
+         * Hooks node substitutions.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to substitute.
+         */
+        function onSubstituteNode(hint, node) {
+            node = previousOnSubstituteNode(hint, node);
+            if (node.id && noSubstitution[node.id]) {
+                return node;
+            }
+            if (hint === 1 /* Expression */) {
+                return substituteExpression(node);
+            }
+            else if (ts.isShorthandPropertyAssignment(node)) {
+                return substituteShorthandPropertyAssignment(node);
+            }
+            return node;
+        }
+        /**
+         * Substitution for a ShorthandPropertyAssignment whose declaration name is an imported
+         * or exported symbol.
+         *
+         * @param node The node to substitute.
+         */
+        function substituteShorthandPropertyAssignment(node) {
+            var name = node.name;
+            var exportedOrImportedName = substituteExpressionIdentifier(name);
+            if (exportedOrImportedName !== name) {
+                // A shorthand property with an assignment initializer is probably part of a
+                // destructuring assignment
+                if (node.objectAssignmentInitializer) {
+                    var initializer = ts.createAssignment(exportedOrImportedName, node.objectAssignmentInitializer);
+                    return ts.setTextRange(ts.createPropertyAssignment(name, initializer), node);
+                }
+                return ts.setTextRange(ts.createPropertyAssignment(name, exportedOrImportedName), node);
+            }
+            return node;
+        }
+        /**
+         * Substitution for an Expression that may contain an imported or exported symbol.
+         *
+         * @param node The node to substitute.
+         */
+        function substituteExpression(node) {
+            switch (node.kind) {
+                case 71 /* Identifier */:
+                    return substituteExpressionIdentifier(node);
+                case 200 /* BinaryExpression */:
+                    return substituteBinaryExpression(node);
+                case 199 /* PostfixUnaryExpression */:
+                case 198 /* PrefixUnaryExpression */:
+                    return substituteUnaryExpression(node);
+            }
+            return node;
+        }
+        /**
+         * Substitution for an Identifier expression that may contain an imported or exported
+         * symbol.
+         *
+         * @param node The node to substitute.
+         */
+        function substituteExpressionIdentifier(node) {
+            if (ts.getEmitFlags(node) & 4096 /* HelperName */) {
+                var externalHelpersModuleName = ts.getExternalHelpersModuleName(currentSourceFile);
+                if (externalHelpersModuleName) {
+                    return ts.createPropertyAccess(externalHelpersModuleName, node);
+                }
+                return node;
+            }
+            if (!ts.isGeneratedIdentifier(node) && !ts.isLocalName(node)) {
+                var exportContainer = resolver.getReferencedExportContainer(node, ts.isExportName(node));
+                if (exportContainer && exportContainer.kind === 274 /* SourceFile */) {
+                    return ts.setTextRange(ts.createPropertyAccess(ts.createIdentifier("exports"), ts.getSynthesizedClone(node)), 
+                    /*location*/ node);
+                }
+                var importDeclaration = resolver.getReferencedImportDeclaration(node);
+                if (importDeclaration) {
+                    if (ts.isImportClause(importDeclaration)) {
+                        return ts.setTextRange(ts.createPropertyAccess(ts.getGeneratedNameForNode(importDeclaration.parent), ts.createIdentifier("default")), 
+                        /*location*/ node);
+                    }
+                    else if (ts.isImportSpecifier(importDeclaration)) {
+                        var name = importDeclaration.propertyName || importDeclaration.name;
+                        return ts.setTextRange(ts.createPropertyAccess(ts.getGeneratedNameForNode(importDeclaration.parent.parent.parent), ts.getSynthesizedClone(name)), 
+                        /*location*/ node);
+                    }
+                }
+            }
+            return node;
+        }
+        /**
+         * Substitution for a BinaryExpression that may contain an imported or exported symbol.
+         *
+         * @param node The node to substitute.
+         */
+        function substituteBinaryExpression(node) {
+            // When we see an assignment expression whose left-hand side is an exported symbol,
+            // we should ensure all exports of that symbol are updated with the correct value.
+            //
+            // - We do not substitute generated identifiers for any reason.
+            // - We do not substitute identifiers tagged with the LocalName flag.
+            // - We do not substitute identifiers that were originally the name of an enum or
+            //   namespace due to how they are transformed in TypeScript.
+            // - We only substitute identifiers that are exported at the top level.
+            if (ts.isAssignmentOperator(node.operatorToken.kind)
+                && ts.isIdentifier(node.left)
+                && !ts.isGeneratedIdentifier(node.left)
+                && !ts.isLocalName(node.left)
+                && !ts.isDeclarationNameOfEnumOrNamespace(node.left)) {
+                var exportedNames = getExports(node.left);
+                if (exportedNames) {
+                    // For each additional export of the declaration, apply an export assignment.
+                    var expression = node;
+                    for (var _i = 0, exportedNames_2 = exportedNames; _i < exportedNames_2.length; _i++) {
+                        var exportName = exportedNames_2[_i];
+                        // Mark the node to prevent triggering this rule again.
+                        noSubstitution[ts.getNodeId(expression)] = true;
+                        expression = createExportExpression(exportName, expression, /*location*/ node);
+                    }
+                    return expression;
+                }
+            }
+            return node;
+        }
+        /**
+         * Substitution for a UnaryExpression that may contain an imported or exported symbol.
+         *
+         * @param node The node to substitute.
+         */
+        function substituteUnaryExpression(node) {
+            // When we see a prefix or postfix increment expression whose operand is an exported
+            // symbol, we should ensure all exports of that symbol are updated with the correct
+            // value.
+            //
+            // - We do not substitute generated identifiers for any reason.
+            // - We do not substitute identifiers tagged with the LocalName flag.
+            // - We do not substitute identifiers that were originally the name of an enum or
+            //   namespace due to how they are transformed in TypeScript.
+            // - We only substitute identifiers that are exported at the top level.
+            if ((node.operator === 43 /* PlusPlusToken */ || node.operator === 44 /* MinusMinusToken */)
+                && ts.isIdentifier(node.operand)
+                && !ts.isGeneratedIdentifier(node.operand)
+                && !ts.isLocalName(node.operand)
+                && !ts.isDeclarationNameOfEnumOrNamespace(node.operand)) {
+                var exportedNames = getExports(node.operand);
+                if (exportedNames) {
+                    var expression = node.kind === 199 /* PostfixUnaryExpression */
+                        ? ts.setTextRange(ts.createBinary(node.operand, ts.createToken(node.operator === 43 /* PlusPlusToken */ ? 59 /* PlusEqualsToken */ : 60 /* MinusEqualsToken */), ts.createLiteral(1)), 
+                        /*location*/ node)
+                        : node;
+                    for (var _i = 0, exportedNames_3 = exportedNames; _i < exportedNames_3.length; _i++) {
+                        var exportName = exportedNames_3[_i];
+                        // Mark the node to prevent triggering this rule again.
+                        noSubstitution[ts.getNodeId(expression)] = true;
+                        expression = createExportExpression(exportName, expression);
+                    }
+                    return expression;
+                }
+            }
+            return node;
+        }
+        /**
+         * Gets the additional exports of a name.
+         *
+         * @param name The name.
+         */
+        function getExports(name) {
+            if (!ts.isGeneratedIdentifier(name)) {
+                var valueDeclaration = resolver.getReferencedImportDeclaration(name)
+                    || resolver.getReferencedValueDeclaration(name);
+                if (valueDeclaration) {
+                    return currentModuleInfo
+                        && currentModuleInfo.exportedBindings[ts.getOriginalNodeId(valueDeclaration)];
+                }
+            }
+        }
+    }
+    ts.transformModule = transformModule;
+    // emit output for the __export helper function
+    var exportStarHelper = {
+        name: "typescript:export-star",
+        scoped: true,
+        text: "\n            function __export(m) {\n                for (var p in m) if (!exports.hasOwnProperty(p)) exports[p] = m[p];\n            }"
+    };
+    function createExportStarHelper(context, module) {
+        var compilerOptions = context.getCompilerOptions();
+        return compilerOptions.importHelpers
+            ? ts.createCall(ts.getHelperName("__exportStar"), /*typeArguments*/ undefined, [module, ts.createIdentifier("exports")])
+            : ts.createCall(ts.createIdentifier("__export"), /*typeArguments*/ undefined, [module]);
+    }
+    // emit helper for dynamic import
+    var dynamicImportUMDHelper = {
+        name: "typescript:dynamicimport-sync-require",
+        scoped: true,
+        text: "\n            var __syncRequire = typeof module === \"object\" && typeof module.exports === \"object\";"
+    };
+    // emit helper for `import * as Name from "foo"`
+    var importStarHelper = {
+        name: "typescript:commonjsimportstar",
+        scoped: false,
+        text: "\nvar __importStar = (this && this.__importStar) || function (mod) {\n    if (mod && mod.__esModule) return mod;\n    var result = {};\n    if (mod != null) for (var k in mod) if (Object.hasOwnProperty.call(mod, k)) result[k] = mod[k];\n    result[\"default\"] = mod;\n    return result;\n};"
+    };
+    // emit helper for `import Name from "foo"`
+    var importDefaultHelper = {
+        name: "typescript:commonjsimportdefault",
+        scoped: false,
+        text: "\nvar __importDefault = (this && this.__importDefault) || function (mod) {\n    return (mod && mod.__esModule) ? mod : { \"default\": mod };\n};"
+    };
+})(ts || (ts = {}));
+/*@internal*/
+var ts;
+(function (ts) {
+    function transformSystemModule(context) {
+        var startLexicalEnvironment = context.startLexicalEnvironment, endLexicalEnvironment = context.endLexicalEnvironment, hoistVariableDeclaration = context.hoistVariableDeclaration;
+        var compilerOptions = context.getCompilerOptions();
+        var resolver = context.getEmitResolver();
+        var host = context.getEmitHost();
+        var previousOnSubstituteNode = context.onSubstituteNode;
+        var previousOnEmitNode = context.onEmitNode;
+        context.onSubstituteNode = onSubstituteNode;
+        context.onEmitNode = onEmitNode;
+        context.enableSubstitution(71 /* Identifier */); // Substitutes expression identifiers for imported symbols.
+        context.enableSubstitution(271 /* ShorthandPropertyAssignment */); // Substitutes expression identifiers for imported symbols
+        context.enableSubstitution(200 /* BinaryExpression */); // Substitutes assignments to exported symbols.
+        context.enableSubstitution(198 /* PrefixUnaryExpression */); // Substitutes updates to exported symbols.
+        context.enableSubstitution(199 /* PostfixUnaryExpression */); // Substitutes updates to exported symbols.
+        context.enableEmitNotification(274 /* SourceFile */); // Restore state when substituting nodes in a file.
+        var moduleInfoMap = []; // The ExternalModuleInfo for each file.
+        var deferredExports = []; // Exports to defer until an EndOfDeclarationMarker is found.
+        var exportFunctionsMap = []; // The export function associated with a source file.
+        var noSubstitutionMap = []; // Set of nodes for which substitution rules should be ignored for each file.
+        var currentSourceFile; // The current file.
+        var moduleInfo; // ExternalModuleInfo for the current file.
+        var exportFunction; // The export function for the current file.
+        var contextObject; // The context object for the current file.
+        var hoistedStatements;
+        var enclosingBlockScopedContainer;
+        var noSubstitution; // Set of nodes for which substitution rules should be ignored.
+        return ts.chainBundle(transformSourceFile);
+        /**
+         * Transforms the module aspects of a SourceFile.
+         *
+         * @param node The SourceFile node.
+         */
+        function transformSourceFile(node) {
+            if (node.isDeclarationFile || !(ts.isEffectiveExternalModule(node, compilerOptions) || node.transformFlags & 67108864 /* ContainsDynamicImport */)) {
+                return node;
+            }
+            var id = ts.getOriginalNodeId(node);
+            currentSourceFile = node;
+            enclosingBlockScopedContainer = node;
+            // System modules have the following shape:
+            //
+            //     System.register(['dep-1', ... 'dep-n'], function(exports) {/* module body function */})
+            //
+            // The parameter 'exports' here is a callback '<T>(name: string, value: T) => T' that
+            // is used to publish exported values. 'exports' returns its 'value' argument so in
+            // most cases expressions that mutate exported values can be rewritten as:
+            //
+            //     expr -> exports('name', expr)
+            //
+            // The only exception in this rule is postfix unary operators,
+            // see comment to 'substitutePostfixUnaryExpression' for more details
+            // Collect information about the external module and dependency groups.
+            moduleInfo = moduleInfoMap[id] = ts.collectExternalModuleInfo(node, resolver, compilerOptions);
+            // Make sure that the name of the 'exports' function does not conflict with
+            // existing identifiers.
+            exportFunction = ts.createUniqueName("exports");
+            exportFunctionsMap[id] = exportFunction;
+            contextObject = ts.createUniqueName("context");
+            // Add the body of the module.
+            var dependencyGroups = collectDependencyGroups(moduleInfo.externalImports);
+            var moduleBodyBlock = createSystemModuleBody(node, dependencyGroups);
+            var moduleBodyFunction = ts.createFunctionExpression(
+            /*modifiers*/ undefined, 
+            /*asteriskToken*/ undefined, 
+            /*name*/ undefined, 
+            /*typeParameters*/ undefined, [
+                ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, exportFunction),
+                ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, contextObject)
+            ], 
+            /*type*/ undefined, moduleBodyBlock);
+            // Write the call to `System.register`
+            // Clear the emit-helpers flag for later passes since we'll have already used it in the module body
+            // So the helper will be emit at the correct position instead of at the top of the source-file
+            var moduleName = ts.tryGetModuleNameFromFile(node, host, compilerOptions);
+            var dependencies = ts.createArrayLiteral(ts.map(dependencyGroups, function (dependencyGroup) { return dependencyGroup.name; }));
+            var updated = ts.setEmitFlags(ts.updateSourceFileNode(node, ts.setTextRange(ts.createNodeArray([
+                ts.createStatement(ts.createCall(ts.createPropertyAccess(ts.createIdentifier("System"), "register"), 
+                /*typeArguments*/ undefined, moduleName
+                    ? [moduleName, dependencies, moduleBodyFunction]
+                    : [dependencies, moduleBodyFunction]))
+            ]), node.statements)), 1024 /* NoTrailingComments */);
+            if (!(compilerOptions.outFile || compilerOptions.out)) {
+                ts.moveEmitHelpers(updated, moduleBodyBlock, function (helper) { return !helper.scoped; });
+            }
+            if (noSubstitution) {
+                noSubstitutionMap[id] = noSubstitution;
+                noSubstitution = undefined;
+            }
+            currentSourceFile = undefined;
+            moduleInfo = undefined;
+            exportFunction = undefined;
+            contextObject = undefined;
+            hoistedStatements = undefined;
+            enclosingBlockScopedContainer = undefined;
+            return ts.aggregateTransformFlags(updated);
+        }
+        /**
+         * Collects the dependency groups for this files imports.
+         *
+         * @param externalImports The imports for the file.
+         */
+        function collectDependencyGroups(externalImports) {
+            var groupIndices = ts.createMap();
+            var dependencyGroups = [];
+            for (var _i = 0, externalImports_1 = externalImports; _i < externalImports_1.length; _i++) {
+                var externalImport = externalImports_1[_i];
+                var externalModuleName = ts.getExternalModuleNameLiteral(externalImport, currentSourceFile, host, resolver, compilerOptions);
+                if (externalModuleName) {
+                    var text = externalModuleName.text;
+                    var groupIndex = groupIndices.get(text);
+                    if (groupIndex !== undefined) {
+                        // deduplicate/group entries in dependency list by the dependency name
+                        dependencyGroups[groupIndex].externalImports.push(externalImport);
+                    }
+                    else {
+                        groupIndices.set(text, dependencyGroups.length);
+                        dependencyGroups.push({
+                            name: externalModuleName,
+                            externalImports: [externalImport]
+                        });
+                    }
+                }
+            }
+            return dependencyGroups;
+        }
+        /**
+         * Adds the statements for the module body function for the source file.
+         *
+         * @param node The source file for the module.
+         * @param dependencyGroups The grouped dependencies of the module.
+         */
+        function createSystemModuleBody(node, dependencyGroups) {
+            // Shape of the body in system modules:
+            //
+            //  function (exports) {
+            //      <list of local aliases for imports>
+            //      <hoisted variable declarations>
+            //      <hoisted function declarations>
+            //      return {
+            //          setters: [
+            //              <list of setter function for imports>
+            //          ],
+            //          execute: function() {
+            //              <module statements>
+            //          }
+            //      }
+            //      <temp declarations>
+            //  }
+            //
+            // i.e:
+            //
+            //   import {x} from 'file1'
+            //   var y = 1;
+            //   export function foo() { return y + x(); }
+            //   console.log(y);
+            //
+            // Will be transformed to:
+            //
+            //  function(exports) {
+            //      function foo() { return y + file_1.x(); }
+            //      exports("foo", foo);
+            //      var file_1, y;
+            //      return {
+            //          setters: [
+            //              function(v) { file_1 = v }
+            //          ],
+            //          execute(): function() {
+            //              y = 1;
+            //              console.log(y);
+            //          }
+            //      };
+            //  }
+            var statements = [];
+            // We start a new lexical environment in this function body, but *not* in the
+            // body of the execute function. This allows us to emit temporary declarations
+            // only in the outer module body and not in the inner one.
+            startLexicalEnvironment();
+            // Add any prologue directives.
+            var ensureUseStrict = ts.getStrictOptionValue(compilerOptions, "alwaysStrict") || (!compilerOptions.noImplicitUseStrict && ts.isExternalModule(currentSourceFile));
+            var statementOffset = ts.addPrologue(statements, node.statements, ensureUseStrict, sourceElementVisitor);
+            // var __moduleName = context_1 && context_1.id;
+            statements.push(ts.createVariableStatement(
+            /*modifiers*/ undefined, ts.createVariableDeclarationList([
+                ts.createVariableDeclaration("__moduleName", 
+                /*type*/ undefined, ts.createLogicalAnd(contextObject, ts.createPropertyAccess(contextObject, "id")))
+            ])));
+            // Visit the synthetic external helpers import declaration if present
+            ts.visitNode(moduleInfo.externalHelpersImportDeclaration, sourceElementVisitor, ts.isStatement);
+            // Visit the statements of the source file, emitting any transformations into
+            // the `executeStatements` array. We do this *before* we fill the `setters` array
+            // as we both emit transformations as well as aggregate some data used when creating
+            // setters. This allows us to reduce the number of times we need to loop through the
+            // statements of the source file.
+            var executeStatements = ts.visitNodes(node.statements, sourceElementVisitor, ts.isStatement, statementOffset);
+            // Emit early exports for function declarations.
+            ts.addRange(statements, hoistedStatements);
+            // We emit hoisted variables early to align roughly with our previous emit output.
+            // Two key differences in this approach are:
+            // - Temporary variables will appear at the top rather than at the bottom of the file
+            ts.prependStatements(statements, endLexicalEnvironment());
+            var exportStarFunction = addExportStarIfNeeded(statements); // TODO: GH#18217
+            var moduleObject = ts.createObjectLiteral([
+                ts.createPropertyAssignment("setters", createSettersArray(exportStarFunction, dependencyGroups)),
+                ts.createPropertyAssignment("execute", ts.createFunctionExpression(
+                /*modifiers*/ undefined, 
+                /*asteriskToken*/ undefined, 
+                /*name*/ undefined, 
+                /*typeParameters*/ undefined, 
+                /*parameters*/ [], 
+                /*type*/ undefined, ts.createBlock(executeStatements, /*multiLine*/ true)))
+            ]);
+            moduleObject.multiLine = true;
+            statements.push(ts.createReturn(moduleObject));
+            return ts.createBlock(statements, /*multiLine*/ true);
+        }
+        /**
+         * Adds an exportStar function to a statement list if it is needed for the file.
+         *
+         * @param statements A statement list.
+         */
+        function addExportStarIfNeeded(statements) {
+            if (!moduleInfo.hasExportStarsToExportValues) {
+                return;
+            }
+            // when resolving exports local exported entries/indirect exported entries in the module
+            // should always win over entries with similar names that were added via star exports
+            // to support this we store names of local/indirect exported entries in a set.
+            // this set is used to filter names brought by star expors.
+            // local names set should only be added if we have anything exported
+            if (!moduleInfo.exportedNames && moduleInfo.exportSpecifiers.size === 0) {
+                // no exported declarations (export var ...) or export specifiers (export {x})
+                // check if we have any non star export declarations.
+                var hasExportDeclarationWithExportClause = false;
+                for (var _i = 0, _a = moduleInfo.externalImports; _i < _a.length; _i++) {
+                    var externalImport = _a[_i];
+                    if (externalImport.kind === 250 /* ExportDeclaration */ && externalImport.exportClause) {
+                        hasExportDeclarationWithExportClause = true;
+                        break;
+                    }
+                }
+                if (!hasExportDeclarationWithExportClause) {
+                    // we still need to emit exportStar helper
+                    var exportStarFunction_1 = createExportStarFunction(/*localNames*/ undefined);
+                    statements.push(exportStarFunction_1);
+                    return exportStarFunction_1.name;
+                }
+            }
+            var exportedNames = [];
+            if (moduleInfo.exportedNames) {
+                for (var _b = 0, _c = moduleInfo.exportedNames; _b < _c.length; _b++) {
+                    var exportedLocalName = _c[_b];
+                    if (exportedLocalName.escapedText === "default") {
+                        continue;
+                    }
+                    // write name of exported declaration, i.e 'export var x...'
+                    exportedNames.push(ts.createPropertyAssignment(ts.createLiteral(exportedLocalName), ts.createTrue()));
+                }
+            }
+            for (var _d = 0, _e = moduleInfo.externalImports; _d < _e.length; _d++) {
+                var externalImport = _e[_d];
+                if (externalImport.kind !== 250 /* ExportDeclaration */) {
+                    continue;
+                }
+                if (!externalImport.exportClause) {
+                    // export * from ...
+                    continue;
+                }
+                for (var _f = 0, _g = externalImport.exportClause.elements; _f < _g.length; _f++) {
+                    var element = _g[_f];
+                    // write name of indirectly exported entry, i.e. 'export {x} from ...'
+                    exportedNames.push(ts.createPropertyAssignment(ts.createLiteral(ts.idText(element.name || element.propertyName)), ts.createTrue()));
+                }
+            }
+            var exportedNamesStorageRef = ts.createUniqueName("exportedNames");
+            statements.push(ts.createVariableStatement(
+            /*modifiers*/ undefined, ts.createVariableDeclarationList([
+                ts.createVariableDeclaration(exportedNamesStorageRef, 
+                /*type*/ undefined, ts.createObjectLiteral(exportedNames, /*multiline*/ true))
+            ])));
+            var exportStarFunction = createExportStarFunction(exportedNamesStorageRef);
+            statements.push(exportStarFunction);
+            return exportStarFunction.name;
+        }
+        /**
+         * Creates an exportStar function for the file, with an optional set of excluded local
+         * names.
+         *
+         * @param localNames An optional reference to an object containing a set of excluded local
+         * names.
+         */
+        function createExportStarFunction(localNames) {
+            var exportStarFunction = ts.createUniqueName("exportStar");
+            var m = ts.createIdentifier("m");
+            var n = ts.createIdentifier("n");
+            var exports = ts.createIdentifier("exports");
+            var condition = ts.createStrictInequality(n, ts.createLiteral("default"));
+            if (localNames) {
+                condition = ts.createLogicalAnd(condition, ts.createLogicalNot(ts.createCall(ts.createPropertyAccess(localNames, "hasOwnProperty"), 
+                /*typeArguments*/ undefined, [n])));
+            }
+            return ts.createFunctionDeclaration(
+            /*decorators*/ undefined, 
+            /*modifiers*/ undefined, 
+            /*asteriskToken*/ undefined, exportStarFunction, 
+            /*typeParameters*/ undefined, [ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, m)], 
+            /*type*/ undefined, ts.createBlock([
+                ts.createVariableStatement(
+                /*modifiers*/ undefined, ts.createVariableDeclarationList([
+                    ts.createVariableDeclaration(exports, 
+                    /*type*/ undefined, ts.createObjectLiteral([]))
+                ])),
+                ts.createForIn(ts.createVariableDeclarationList([
+                    ts.createVariableDeclaration(n, /*type*/ undefined)
+                ]), m, ts.createBlock([
+                    ts.setEmitFlags(ts.createIf(condition, ts.createStatement(ts.createAssignment(ts.createElementAccess(exports, n), ts.createElementAccess(m, n)))), 1 /* SingleLine */)
+                ])),
+                ts.createStatement(ts.createCall(exportFunction, 
+                /*typeArguments*/ undefined, [exports]))
+            ], /*multiline*/ true));
+        }
+        /**
+         * Creates an array setter callbacks for each dependency group.
+         *
+         * @param exportStarFunction A reference to an exportStarFunction for the file.
+         * @param dependencyGroups An array of grouped dependencies.
+         */
+        function createSettersArray(exportStarFunction, dependencyGroups) {
+            var setters = [];
+            for (var _i = 0, dependencyGroups_1 = dependencyGroups; _i < dependencyGroups_1.length; _i++) {
+                var group_1 = dependencyGroups_1[_i];
+                // derive a unique name for parameter from the first named entry in the group
+                var localName = ts.forEach(group_1.externalImports, function (i) { return ts.getLocalNameForExternalImport(i, currentSourceFile); });
+                var parameterName = localName ? ts.getGeneratedNameForNode(localName) : ts.createUniqueName("");
+                var statements = [];
+                for (var _a = 0, _b = group_1.externalImports; _a < _b.length; _a++) {
+                    var entry = _b[_a];
+                    var importVariableName = ts.getLocalNameForExternalImport(entry, currentSourceFile); // TODO: GH#18217
+                    switch (entry.kind) {
+                        case 244 /* ImportDeclaration */:
+                            if (!entry.importClause) {
+                                // 'import "..."' case
+                                // module is imported only for side-effects, no emit required
+                                break;
+                            }
+                        // falls through
+                        case 243 /* ImportEqualsDeclaration */:
+                            ts.Debug.assert(importVariableName !== undefined);
+                            // save import into the local
+                            statements.push(ts.createStatement(ts.createAssignment(importVariableName, parameterName)));
+                            break;
+                        case 250 /* ExportDeclaration */:
+                            ts.Debug.assert(importVariableName !== undefined);
+                            if (entry.exportClause) {
+                                //  export {a, b as c} from 'foo'
+                                //
+                                // emit as:
+                                //
+                                //  exports_({
+                                //     "a": _["a"],
+                                //     "c": _["b"]
+                                //  });
+                                var properties = [];
+                                for (var _c = 0, _d = entry.exportClause.elements; _c < _d.length; _c++) {
+                                    var e = _d[_c];
+                                    properties.push(ts.createPropertyAssignment(ts.createLiteral(ts.idText(e.name)), ts.createElementAccess(parameterName, ts.createLiteral(ts.idText(e.propertyName || e.name)))));
+                                }
+                                statements.push(ts.createStatement(ts.createCall(exportFunction, 
+                                /*typeArguments*/ undefined, [ts.createObjectLiteral(properties, /*multiline*/ true)])));
+                            }
+                            else {
+                                //  export * from 'foo'
+                                //
+                                // emit as:
+                                //
+                                //  exportStar(foo_1_1);
+                                statements.push(ts.createStatement(ts.createCall(exportStarFunction, 
+                                /*typeArguments*/ undefined, [parameterName])));
+                            }
+                            break;
+                    }
+                }
+                setters.push(ts.createFunctionExpression(
+                /*modifiers*/ undefined, 
+                /*asteriskToken*/ undefined, 
+                /*name*/ undefined, 
+                /*typeParameters*/ undefined, [ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, parameterName)], 
+                /*type*/ undefined, ts.createBlock(statements, /*multiLine*/ true)));
+            }
+            return ts.createArrayLiteral(setters, /*multiLine*/ true);
+        }
+        //
+        // Top-level Source Element Visitors
+        //
+        /**
+         * Visit source elements at the top-level of a module.
+         *
+         * @param node The node to visit.
+         */
+        function sourceElementVisitor(node) {
+            switch (node.kind) {
+                case 244 /* ImportDeclaration */:
+                    return visitImportDeclaration(node);
+                case 243 /* ImportEqualsDeclaration */:
+                    return visitImportEqualsDeclaration(node);
+                case 250 /* ExportDeclaration */:
+                    // ExportDeclarations are elided as they are handled via
+                    // `appendExportsOfDeclaration`.
+                    return undefined;
+                case 249 /* ExportAssignment */:
+                    return visitExportAssignment(node);
+                default:
+                    return nestedElementVisitor(node);
+            }
+        }
+        /**
+         * Visits an ImportDeclaration node.
+         *
+         * @param node The node to visit.
+         */
+        function visitImportDeclaration(node) {
+            var statements;
+            if (node.importClause) {
+                hoistVariableDeclaration(ts.getLocalNameForExternalImport(node, currentSourceFile)); // TODO: GH#18217
+            }
+            if (hasAssociatedEndOfDeclarationMarker(node)) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                var id = ts.getOriginalNodeId(node);
+                deferredExports[id] = appendExportsOfImportDeclaration(deferredExports[id], node);
+            }
+            else {
+                statements = appendExportsOfImportDeclaration(statements, node);
+            }
+            return ts.singleOrMany(statements);
+        }
+        /**
+         * Visits an ImportEqualsDeclaration node.
+         *
+         * @param node The node to visit.
+         */
+        function visitImportEqualsDeclaration(node) {
+            ts.Debug.assert(ts.isExternalModuleImportEqualsDeclaration(node), "import= for internal module references should be handled in an earlier transformer.");
+            var statements;
+            hoistVariableDeclaration(ts.getLocalNameForExternalImport(node, currentSourceFile)); // TODO: GH#18217
+            if (hasAssociatedEndOfDeclarationMarker(node)) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                var id = ts.getOriginalNodeId(node);
+                deferredExports[id] = appendExportsOfImportEqualsDeclaration(deferredExports[id], node);
+            }
+            else {
+                statements = appendExportsOfImportEqualsDeclaration(statements, node);
+            }
+            return ts.singleOrMany(statements);
+        }
+        /**
+         * Visits an ExportAssignment node.
+         *
+         * @param node The node to visit.
+         */
+        function visitExportAssignment(node) {
+            if (node.isExportEquals) {
+                // Elide `export=` as it is illegal in a SystemJS module.
+                return undefined;
+            }
+            var expression = ts.visitNode(node.expression, destructuringAndImportCallVisitor, ts.isExpression);
+            var original = node.original;
+            if (original && hasAssociatedEndOfDeclarationMarker(original)) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                var id = ts.getOriginalNodeId(node);
+                deferredExports[id] = appendExportStatement(deferredExports[id], ts.createIdentifier("default"), expression, /*allowComments*/ true);
+            }
+            else {
+                return createExportStatement(ts.createIdentifier("default"), expression, /*allowComments*/ true);
+            }
+        }
+        /**
+         * Visits a FunctionDeclaration, hoisting it to the outer module body function.
+         *
+         * @param node The node to visit.
+         */
+        function visitFunctionDeclaration(node) {
+            if (ts.hasModifier(node, 1 /* Export */)) {
+                hoistedStatements = ts.append(hoistedStatements, ts.updateFunctionDeclaration(node, node.decorators, ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), node.asteriskToken, ts.getDeclarationName(node, /*allowComments*/ true, /*allowSourceMaps*/ true), 
+                /*typeParameters*/ undefined, ts.visitNodes(node.parameters, destructuringAndImportCallVisitor, ts.isParameterDeclaration), 
+                /*type*/ undefined, ts.visitNode(node.body, destructuringAndImportCallVisitor, ts.isBlock)));
+            }
+            else {
+                hoistedStatements = ts.append(hoistedStatements, ts.visitEachChild(node, destructuringAndImportCallVisitor, context));
+            }
+            if (hasAssociatedEndOfDeclarationMarker(node)) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                var id = ts.getOriginalNodeId(node);
+                deferredExports[id] = appendExportsOfHoistedDeclaration(deferredExports[id], node);
+            }
+            else {
+                hoistedStatements = appendExportsOfHoistedDeclaration(hoistedStatements, node);
+            }
+            return undefined;
+        }
+        /**
+         * Visits a ClassDeclaration, hoisting its name to the outer module body function.
+         *
+         * @param node The node to visit.
+         */
+        function visitClassDeclaration(node) {
+            var statements;
+            // Hoist the name of the class declaration to the outer module body function.
+            var name = ts.getLocalName(node);
+            hoistVariableDeclaration(name);
+            // Rewrite the class declaration into an assignment of a class expression.
+            statements = ts.append(statements, ts.setTextRange(ts.createStatement(ts.createAssignment(name, ts.setTextRange(ts.createClassExpression(
+            /*modifiers*/ undefined, node.name, 
+            /*typeParameters*/ undefined, ts.visitNodes(node.heritageClauses, destructuringAndImportCallVisitor, ts.isHeritageClause), ts.visitNodes(node.members, destructuringAndImportCallVisitor, ts.isClassElement)), node))), node));
+            if (hasAssociatedEndOfDeclarationMarker(node)) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                var id = ts.getOriginalNodeId(node);
+                deferredExports[id] = appendExportsOfHoistedDeclaration(deferredExports[id], node);
+            }
+            else {
+                statements = appendExportsOfHoistedDeclaration(statements, node);
+            }
+            return ts.singleOrMany(statements);
+        }
+        /**
+         * Visits a variable statement, hoisting declared names to the top-level module body.
+         * Each declaration is rewritten into an assignment expression.
+         *
+         * @param node The node to visit.
+         */
+        function visitVariableStatement(node) {
+            if (!shouldHoistVariableDeclarationList(node.declarationList)) {
+                return ts.visitNode(node, destructuringAndImportCallVisitor, ts.isStatement);
+            }
+            var expressions;
+            var isExportedDeclaration = ts.hasModifier(node, 1 /* Export */);
+            var isMarkedDeclaration = hasAssociatedEndOfDeclarationMarker(node);
+            for (var _i = 0, _a = node.declarationList.declarations; _i < _a.length; _i++) {
+                var variable = _a[_i];
+                if (variable.initializer) {
+                    expressions = ts.append(expressions, transformInitializedVariable(variable, isExportedDeclaration && !isMarkedDeclaration));
+                }
+                else {
+                    hoistBindingElement(variable);
+                }
+            }
+            var statements;
+            if (expressions) {
+                statements = ts.append(statements, ts.setTextRange(ts.createStatement(ts.inlineExpressions(expressions)), node));
+            }
+            if (isMarkedDeclaration) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                var id = ts.getOriginalNodeId(node);
+                deferredExports[id] = appendExportsOfVariableStatement(deferredExports[id], node, isExportedDeclaration);
+            }
+            else {
+                statements = appendExportsOfVariableStatement(statements, node, /*exportSelf*/ false);
+            }
+            return ts.singleOrMany(statements);
+        }
+        /**
+         * Hoists the declared names of a VariableDeclaration or BindingElement.
+         *
+         * @param node The declaration to hoist.
+         */
+        function hoistBindingElement(node) {
+            if (ts.isBindingPattern(node.name)) {
+                for (var _i = 0, _a = node.name.elements; _i < _a.length; _i++) {
+                    var element = _a[_i];
+                    if (!ts.isOmittedExpression(element)) {
+                        hoistBindingElement(element);
+                    }
+                }
+            }
+            else {
+                hoistVariableDeclaration(ts.getSynthesizedClone(node.name));
+            }
+        }
+        /**
+         * Determines whether a VariableDeclarationList should be hoisted.
+         *
+         * @param node The node to test.
+         */
+        function shouldHoistVariableDeclarationList(node) {
+            // hoist only non-block scoped declarations or block scoped declarations parented by source file
+            return (ts.getEmitFlags(node) & 2097152 /* NoHoisting */) === 0
+                && (enclosingBlockScopedContainer.kind === 274 /* SourceFile */
+                    || (ts.getOriginalNode(node).flags & 3 /* BlockScoped */) === 0);
+        }
+        /**
+         * Transform an initialized variable declaration into an expression.
+         *
+         * @param node The node to transform.
+         * @param isExportedDeclaration A value indicating whether the variable is exported.
+         */
+        function transformInitializedVariable(node, isExportedDeclaration) {
+            var createAssignment = isExportedDeclaration ? createExportedVariableAssignment : createNonExportedVariableAssignment;
+            return ts.isBindingPattern(node.name)
+                ? ts.flattenDestructuringAssignment(node, destructuringAndImportCallVisitor, context, 0 /* All */, 
+                /*needsValue*/ false, createAssignment)
+                : node.initializer ? createAssignment(node.name, ts.visitNode(node.initializer, destructuringAndImportCallVisitor, ts.isExpression)) : node.name;
+        }
+        /**
+         * Creates an assignment expression for an exported variable declaration.
+         *
+         * @param name The name of the variable.
+         * @param value The value of the variable's initializer.
+         * @param location The source map location for the assignment.
+         */
+        function createExportedVariableAssignment(name, value, location) {
+            return createVariableAssignment(name, value, location, /*isExportedDeclaration*/ true);
+        }
+        /**
+         * Creates an assignment expression for a non-exported variable declaration.
+         *
+         * @param name The name of the variable.
+         * @param value The value of the variable's initializer.
+         * @param location The source map location for the assignment.
+         */
+        function createNonExportedVariableAssignment(name, value, location) {
+            return createVariableAssignment(name, value, location, /*isExportedDeclaration*/ false);
+        }
+        /**
+         * Creates an assignment expression for a variable declaration.
+         *
+         * @param name The name of the variable.
+         * @param value The value of the variable's initializer.
+         * @param location The source map location for the assignment.
+         * @param isExportedDeclaration A value indicating whether the variable is exported.
+         */
+        function createVariableAssignment(name, value, location, isExportedDeclaration) {
+            hoistVariableDeclaration(ts.getSynthesizedClone(name));
+            return isExportedDeclaration
+                ? createExportExpression(name, preventSubstitution(ts.setTextRange(ts.createAssignment(name, value), location)))
+                : preventSubstitution(ts.setTextRange(ts.createAssignment(name, value), location));
+        }
+        /**
+         * Visits a MergeDeclarationMarker used as a placeholder for the beginning of a merged
+         * and transformed declaration.
+         *
+         * @param node The node to visit.
+         */
+        function visitMergeDeclarationMarker(node) {
+            // For an EnumDeclaration or ModuleDeclaration that merges with a preceeding
+            // declaration we do not emit a leading variable declaration. To preserve the
+            // begin/end semantics of the declararation and to properly handle exports
+            // we wrapped the leading variable declaration in a `MergeDeclarationMarker`.
+            //
+            // To balance the declaration, we defer the exports of the elided variable
+            // statement until we visit this declaration's `EndOfDeclarationMarker`.
+            if (hasAssociatedEndOfDeclarationMarker(node) && node.original.kind === 214 /* VariableStatement */) {
+                var id = ts.getOriginalNodeId(node);
+                var isExportedDeclaration = ts.hasModifier(node.original, 1 /* Export */);
+                deferredExports[id] = appendExportsOfVariableStatement(deferredExports[id], node.original, isExportedDeclaration);
+            }
+            return node;
+        }
+        /**
+         * Determines whether a node has an associated EndOfDeclarationMarker.
+         *
+         * @param node The node to test.
+         */
+        function hasAssociatedEndOfDeclarationMarker(node) {
+            return (ts.getEmitFlags(node) & 4194304 /* HasEndOfDeclarationMarker */) !== 0;
+        }
+        /**
+         * Visits a DeclarationMarker used as a placeholder for the end of a transformed
+         * declaration.
+         *
+         * @param node The node to visit.
+         */
+        function visitEndOfDeclarationMarker(node) {
+            // For some transformations we emit an `EndOfDeclarationMarker` to mark the actual
+            // end of the transformed declaration. We use this marker to emit any deferred exports
+            // of the declaration.
+            var id = ts.getOriginalNodeId(node);
+            var statements = deferredExports[id];
+            if (statements) {
+                delete deferredExports[id];
+                return ts.append(statements, node);
+            }
+            else {
+                var original = ts.getOriginalNode(node);
+                if (ts.isModuleOrEnumDeclaration(original)) {
+                    return ts.append(appendExportsOfDeclaration(statements, original), node);
+                }
+            }
+            return node;
+        }
+        /**
+         * Appends the exports of an ImportDeclaration to a statement list, returning the
+         * statement list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param decl The declaration whose exports are to be recorded.
+         */
+        function appendExportsOfImportDeclaration(statements, decl) {
+            if (moduleInfo.exportEquals) {
+                return statements;
+            }
+            var importClause = decl.importClause;
+            if (!importClause) {
+                return statements;
+            }
+            if (importClause.name) {
+                statements = appendExportsOfDeclaration(statements, importClause);
+            }
+            var namedBindings = importClause.namedBindings;
+            if (namedBindings) {
+                switch (namedBindings.kind) {
+                    case 246 /* NamespaceImport */:
+                        statements = appendExportsOfDeclaration(statements, namedBindings);
+                        break;
+                    case 247 /* NamedImports */:
+                        for (var _i = 0, _a = namedBindings.elements; _i < _a.length; _i++) {
+                            var importBinding = _a[_i];
+                            statements = appendExportsOfDeclaration(statements, importBinding);
+                        }
+                        break;
+                }
+            }
+            return statements;
+        }
+        /**
+         * Appends the export of an ImportEqualsDeclaration to a statement list, returning the
+         * statement list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param decl The declaration whose exports are to be recorded.
+         */
+        function appendExportsOfImportEqualsDeclaration(statements, decl) {
+            if (moduleInfo.exportEquals) {
+                return statements;
+            }
+            return appendExportsOfDeclaration(statements, decl);
+        }
+        /**
+         * Appends the exports of a VariableStatement to a statement list, returning the statement
+         * list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param node The VariableStatement whose exports are to be recorded.
+         * @param exportSelf A value indicating whether to also export each VariableDeclaration of
+         * `nodes` declaration list.
+         */
+        function appendExportsOfVariableStatement(statements, node, exportSelf) {
+            if (moduleInfo.exportEquals) {
+                return statements;
+            }
+            for (var _i = 0, _a = node.declarationList.declarations; _i < _a.length; _i++) {
+                var decl = _a[_i];
+                if (decl.initializer || exportSelf) {
+                    statements = appendExportsOfBindingElement(statements, decl, exportSelf);
+                }
+            }
+            return statements;
+        }
+        /**
+         * Appends the exports of a VariableDeclaration or BindingElement to a statement list,
+         * returning the statement list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param decl The declaration whose exports are to be recorded.
+         * @param exportSelf A value indicating whether to also export the declaration itself.
+         */
+        function appendExportsOfBindingElement(statements, decl, exportSelf) {
+            if (moduleInfo.exportEquals) {
+                return statements;
+            }
+            if (ts.isBindingPattern(decl.name)) {
+                for (var _i = 0, _a = decl.name.elements; _i < _a.length; _i++) {
+                    var element = _a[_i];
+                    if (!ts.isOmittedExpression(element)) {
+                        statements = appendExportsOfBindingElement(statements, element, exportSelf);
+                    }
+                }
+            }
+            else if (!ts.isGeneratedIdentifier(decl.name)) {
+                var excludeName = void 0;
+                if (exportSelf) {
+                    statements = appendExportStatement(statements, decl.name, ts.getLocalName(decl));
+                    excludeName = ts.idText(decl.name);
+                }
+                statements = appendExportsOfDeclaration(statements, decl, excludeName);
+            }
+            return statements;
+        }
+        /**
+         * Appends the exports of a ClassDeclaration or FunctionDeclaration to a statement list,
+         * returning the statement list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param decl The declaration whose exports are to be recorded.
+         */
+        function appendExportsOfHoistedDeclaration(statements, decl) {
+            if (moduleInfo.exportEquals) {
+                return statements;
+            }
+            var excludeName;
+            if (ts.hasModifier(decl, 1 /* Export */)) {
+                var exportName = ts.hasModifier(decl, 512 /* Default */) ? ts.createLiteral("default") : decl.name;
+                statements = appendExportStatement(statements, exportName, ts.getLocalName(decl));
+                excludeName = ts.getTextOfIdentifierOrLiteral(exportName);
+            }
+            if (decl.name) {
+                statements = appendExportsOfDeclaration(statements, decl, excludeName);
+            }
+            return statements;
+        }
+        /**
+         * Appends the exports of a declaration to a statement list, returning the statement list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param decl The declaration to export.
+         * @param excludeName An optional name to exclude from exports.
+         */
+        function appendExportsOfDeclaration(statements, decl, excludeName) {
+            if (moduleInfo.exportEquals) {
+                return statements;
+            }
+            var name = ts.getDeclarationName(decl);
+            var exportSpecifiers = moduleInfo.exportSpecifiers.get(ts.idText(name));
+            if (exportSpecifiers) {
+                for (var _i = 0, exportSpecifiers_2 = exportSpecifiers; _i < exportSpecifiers_2.length; _i++) {
+                    var exportSpecifier = exportSpecifiers_2[_i];
+                    if (exportSpecifier.name.escapedText !== excludeName) {
+                        statements = appendExportStatement(statements, exportSpecifier.name, name);
+                    }
+                }
+            }
+            return statements;
+        }
+        /**
+         * Appends the down-level representation of an export to a statement list, returning the
+         * statement list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param exportName The name of the export.
+         * @param expression The expression to export.
+         * @param allowComments Whether to allow comments on the export.
+         */
+        function appendExportStatement(statements, exportName, expression, allowComments) {
+            statements = ts.append(statements, createExportStatement(exportName, expression, allowComments));
+            return statements;
+        }
+        /**
+         * Creates a call to the current file's export function to export a value.
+         *
+         * @param name The bound name of the export.
+         * @param value The exported value.
+         * @param allowComments An optional value indicating whether to emit comments for the statement.
+         */
+        function createExportStatement(name, value, allowComments) {
+            var statement = ts.createStatement(createExportExpression(name, value));
+            ts.startOnNewLine(statement);
+            if (!allowComments) {
+                ts.setEmitFlags(statement, 1536 /* NoComments */);
+            }
+            return statement;
+        }
+        /**
+         * Creates a call to the current file's export function to export a value.
+         *
+         * @param name The bound name of the export.
+         * @param value The exported value.
+         */
+        function createExportExpression(name, value) {
+            var exportName = ts.isIdentifier(name) ? ts.createLiteral(name) : name;
+            ts.setEmitFlags(value, ts.getEmitFlags(value) | 1536 /* NoComments */);
+            return ts.setCommentRange(ts.createCall(exportFunction, /*typeArguments*/ undefined, [exportName, value]), value);
+        }
+        //
+        // Top-Level or Nested Source Element Visitors
+        //
+        /**
+         * Visit nested elements at the top-level of a module.
+         *
+         * @param node The node to visit.
+         */
+        function nestedElementVisitor(node) {
+            switch (node.kind) {
+                case 214 /* VariableStatement */:
+                    return visitVariableStatement(node);
+                case 234 /* FunctionDeclaration */:
+                    return visitFunctionDeclaration(node);
+                case 235 /* ClassDeclaration */:
+                    return visitClassDeclaration(node);
+                case 220 /* ForStatement */:
+                    return visitForStatement(node);
+                case 221 /* ForInStatement */:
+                    return visitForInStatement(node);
+                case 222 /* ForOfStatement */:
+                    return visitForOfStatement(node);
+                case 218 /* DoStatement */:
+                    return visitDoStatement(node);
+                case 219 /* WhileStatement */:
+                    return visitWhileStatement(node);
+                case 228 /* LabeledStatement */:
+                    return visitLabeledStatement(node);
+                case 226 /* WithStatement */:
+                    return visitWithStatement(node);
+                case 227 /* SwitchStatement */:
+                    return visitSwitchStatement(node);
+                case 241 /* CaseBlock */:
+                    return visitCaseBlock(node);
+                case 266 /* CaseClause */:
+                    return visitCaseClause(node);
+                case 267 /* DefaultClause */:
+                    return visitDefaultClause(node);
+                case 230 /* TryStatement */:
+                    return visitTryStatement(node);
+                case 269 /* CatchClause */:
+                    return visitCatchClause(node);
+                case 213 /* Block */:
+                    return visitBlock(node);
+                case 303 /* MergeDeclarationMarker */:
+                    return visitMergeDeclarationMarker(node);
+                case 304 /* EndOfDeclarationMarker */:
+                    return visitEndOfDeclarationMarker(node);
+                default:
+                    return destructuringAndImportCallVisitor(node);
+            }
+        }
+        /**
+         * Visits the body of a ForStatement to hoist declarations.
+         *
+         * @param node The node to visit.
+         */
+        function visitForStatement(node) {
+            var savedEnclosingBlockScopedContainer = enclosingBlockScopedContainer;
+            enclosingBlockScopedContainer = node;
+            node = ts.updateFor(node, node.initializer && visitForInitializer(node.initializer), ts.visitNode(node.condition, destructuringAndImportCallVisitor, ts.isExpression), ts.visitNode(node.incrementor, destructuringAndImportCallVisitor, ts.isExpression), ts.visitNode(node.statement, nestedElementVisitor, ts.isStatement));
+            enclosingBlockScopedContainer = savedEnclosingBlockScopedContainer;
+            return node;
+        }
+        /**
+         * Visits the body of a ForInStatement to hoist declarations.
+         *
+         * @param node The node to visit.
+         */
+        function visitForInStatement(node) {
+            var savedEnclosingBlockScopedContainer = enclosingBlockScopedContainer;
+            enclosingBlockScopedContainer = node;
+            node = ts.updateForIn(node, visitForInitializer(node.initializer), ts.visitNode(node.expression, destructuringAndImportCallVisitor, ts.isExpression), ts.visitNode(node.statement, nestedElementVisitor, ts.isStatement, ts.liftToBlock));
+            enclosingBlockScopedContainer = savedEnclosingBlockScopedContainer;
+            return node;
+        }
+        /**
+         * Visits the body of a ForOfStatement to hoist declarations.
+         *
+         * @param node The node to visit.
+         */
+        function visitForOfStatement(node) {
+            var savedEnclosingBlockScopedContainer = enclosingBlockScopedContainer;
+            enclosingBlockScopedContainer = node;
+            node = ts.updateForOf(node, node.awaitModifier, visitForInitializer(node.initializer), ts.visitNode(node.expression, destructuringAndImportCallVisitor, ts.isExpression), ts.visitNode(node.statement, nestedElementVisitor, ts.isStatement, ts.liftToBlock));
+            enclosingBlockScopedContainer = savedEnclosingBlockScopedContainer;
+            return node;
+        }
+        /**
+         * Determines whether to hoist the initializer of a ForStatement, ForInStatement, or
+         * ForOfStatement.
+         *
+         * @param node The node to test.
+         */
+        function shouldHoistForInitializer(node) {
+            return ts.isVariableDeclarationList(node)
+                && shouldHoistVariableDeclarationList(node);
+        }
+        /**
+         * Visits the initializer of a ForStatement, ForInStatement, or ForOfStatement
+         *
+         * @param node The node to visit.
+         */
+        function visitForInitializer(node) {
+            if (shouldHoistForInitializer(node)) {
+                var expressions = void 0;
+                for (var _i = 0, _a = node.declarations; _i < _a.length; _i++) {
+                    var variable = _a[_i];
+                    expressions = ts.append(expressions, transformInitializedVariable(variable, /*isExportedDeclaration*/ false));
+                    if (!variable.initializer) {
+                        hoistBindingElement(variable);
+                    }
+                }
+                return expressions ? ts.inlineExpressions(expressions) : ts.createOmittedExpression();
+            }
+            else {
+                return ts.visitEachChild(node, nestedElementVisitor, context);
+            }
+        }
+        /**
+         * Visits the body of a DoStatement to hoist declarations.
+         *
+         * @param node The node to visit.
+         */
+        function visitDoStatement(node) {
+            return ts.updateDo(node, ts.visitNode(node.statement, nestedElementVisitor, ts.isStatement, ts.liftToBlock), ts.visitNode(node.expression, destructuringAndImportCallVisitor, ts.isExpression));
+        }
+        /**
+         * Visits the body of a WhileStatement to hoist declarations.
+         *
+         * @param node The node to visit.
+         */
+        function visitWhileStatement(node) {
+            return ts.updateWhile(node, ts.visitNode(node.expression, destructuringAndImportCallVisitor, ts.isExpression), ts.visitNode(node.statement, nestedElementVisitor, ts.isStatement, ts.liftToBlock));
+        }
+        /**
+         * Visits the body of a LabeledStatement to hoist declarations.
+         *
+         * @param node The node to visit.
+         */
+        function visitLabeledStatement(node) {
+            return ts.updateLabel(node, node.label, ts.visitNode(node.statement, nestedElementVisitor, ts.isStatement, ts.liftToBlock));
+        }
+        /**
+         * Visits the body of a WithStatement to hoist declarations.
+         *
+         * @param node The node to visit.
+         */
+        function visitWithStatement(node) {
+            return ts.updateWith(node, ts.visitNode(node.expression, destructuringAndImportCallVisitor, ts.isExpression), ts.visitNode(node.statement, nestedElementVisitor, ts.isStatement, ts.liftToBlock));
+        }
+        /**
+         * Visits the body of a SwitchStatement to hoist declarations.
+         *
+         * @param node The node to visit.
+         */
+        function visitSwitchStatement(node) {
+            return ts.updateSwitch(node, ts.visitNode(node.expression, destructuringAndImportCallVisitor, ts.isExpression), ts.visitNode(node.caseBlock, nestedElementVisitor, ts.isCaseBlock));
+        }
+        /**
+         * Visits the body of a CaseBlock to hoist declarations.
+         *
+         * @param node The node to visit.
+         */
+        function visitCaseBlock(node) {
+            var savedEnclosingBlockScopedContainer = enclosingBlockScopedContainer;
+            enclosingBlockScopedContainer = node;
+            node = ts.updateCaseBlock(node, ts.visitNodes(node.clauses, nestedElementVisitor, ts.isCaseOrDefaultClause));
+            enclosingBlockScopedContainer = savedEnclosingBlockScopedContainer;
+            return node;
+        }
+        /**
+         * Visits the body of a CaseClause to hoist declarations.
+         *
+         * @param node The node to visit.
+         */
+        function visitCaseClause(node) {
+            return ts.updateCaseClause(node, ts.visitNode(node.expression, destructuringAndImportCallVisitor, ts.isExpression), ts.visitNodes(node.statements, nestedElementVisitor, ts.isStatement));
+        }
+        /**
+         * Visits the body of a DefaultClause to hoist declarations.
+         *
+         * @param node The node to visit.
+         */
+        function visitDefaultClause(node) {
+            return ts.visitEachChild(node, nestedElementVisitor, context);
+        }
+        /**
+         * Visits the body of a TryStatement to hoist declarations.
+         *
+         * @param node The node to visit.
+         */
+        function visitTryStatement(node) {
+            return ts.visitEachChild(node, nestedElementVisitor, context);
+        }
+        /**
+         * Visits the body of a CatchClause to hoist declarations.
+         *
+         * @param node The node to visit.
+         */
+        function visitCatchClause(node) {
+            var savedEnclosingBlockScopedContainer = enclosingBlockScopedContainer;
+            enclosingBlockScopedContainer = node;
+            node = ts.updateCatchClause(node, node.variableDeclaration, ts.visitNode(node.block, nestedElementVisitor, ts.isBlock));
+            enclosingBlockScopedContainer = savedEnclosingBlockScopedContainer;
+            return node;
+        }
+        /**
+         * Visits the body of a Block to hoist declarations.
+         *
+         * @param node The node to visit.
+         */
+        function visitBlock(node) {
+            var savedEnclosingBlockScopedContainer = enclosingBlockScopedContainer;
+            enclosingBlockScopedContainer = node;
+            node = ts.visitEachChild(node, nestedElementVisitor, context);
+            enclosingBlockScopedContainer = savedEnclosingBlockScopedContainer;
+            return node;
+        }
+        //
+        // Destructuring Assignment Visitors
+        //
+        /**
+         * Visit nodes to flatten destructuring assignments to exported symbols.
+         *
+         * @param node The node to visit.
+         */
+        function destructuringAndImportCallVisitor(node) {
+            if (node.transformFlags & 1024 /* DestructuringAssignment */
+                && node.kind === 200 /* BinaryExpression */) {
+                return visitDestructuringAssignment(node);
+            }
+            else if (ts.isImportCall(node)) {
+                return visitImportCallExpression(node);
+            }
+            else if ((node.transformFlags & 2048 /* ContainsDestructuringAssignment */) || (node.transformFlags & 67108864 /* ContainsDynamicImport */)) {
+                return ts.visitEachChild(node, destructuringAndImportCallVisitor, context);
+            }
+            else {
+                return node;
+            }
+        }
+        function visitImportCallExpression(node) {
+            // import("./blah")
+            // emit as
+            // System.register([], function (_export, _context) {
+            //     return {
+            //         setters: [],
+            //         execute: () => {
+            //             _context.import('./blah');
+            //         }
+            //     };
+            // });
+            return ts.createCall(ts.createPropertyAccess(contextObject, ts.createIdentifier("import")), 
+            /*typeArguments*/ undefined, ts.some(node.arguments) ? [ts.visitNode(node.arguments[0], destructuringAndImportCallVisitor)] : []);
+        }
+        /**
+         * Visits a DestructuringAssignment to flatten destructuring to exported symbols.
+         *
+         * @param node The node to visit.
+         */
+        function visitDestructuringAssignment(node) {
+            if (hasExportedReferenceInDestructuringTarget(node.left)) {
+                return ts.flattenDestructuringAssignment(node, destructuringAndImportCallVisitor, context, 0 /* All */, 
+                /*needsValue*/ true);
+            }
+            return ts.visitEachChild(node, destructuringAndImportCallVisitor, context);
+        }
+        /**
+         * Determines whether the target of a destructuring assigment refers to an exported symbol.
+         *
+         * @param node The destructuring target.
+         */
+        function hasExportedReferenceInDestructuringTarget(node) {
+            if (ts.isAssignmentExpression(node, /*excludeCompoundAssignment*/ true)) {
+                return hasExportedReferenceInDestructuringTarget(node.left);
+            }
+            else if (ts.isSpreadElement(node)) {
+                return hasExportedReferenceInDestructuringTarget(node.expression);
+            }
+            else if (ts.isObjectLiteralExpression(node)) {
+                return ts.some(node.properties, hasExportedReferenceInDestructuringTarget);
+            }
+            else if (ts.isArrayLiteralExpression(node)) {
+                return ts.some(node.elements, hasExportedReferenceInDestructuringTarget);
+            }
+            else if (ts.isShorthandPropertyAssignment(node)) {
+                return hasExportedReferenceInDestructuringTarget(node.name);
+            }
+            else if (ts.isPropertyAssignment(node)) {
+                return hasExportedReferenceInDestructuringTarget(node.initializer);
+            }
+            else if (ts.isIdentifier(node)) {
+                var container = resolver.getReferencedExportContainer(node);
+                return container !== undefined && container.kind === 274 /* SourceFile */;
+            }
+            else {
+                return false;
+            }
+        }
+        //
+        // Modifier Visitors
+        //
+        /**
+         * Visit nodes to elide module-specific modifiers.
+         *
+         * @param node The node to visit.
+         */
+        function modifierVisitor(node) {
+            switch (node.kind) {
+                case 84 /* ExportKeyword */:
+                case 79 /* DefaultKeyword */:
+                    return undefined;
+            }
+            return node;
+        }
+        //
+        // Emit Notification
+        //
+        /**
+         * Hook for node emit notifications.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to emit.
+         * @param emitCallback A callback used to emit the node in the printer.
+         */
+        function onEmitNode(hint, node, emitCallback) {
+            if (node.kind === 274 /* SourceFile */) {
+                var id = ts.getOriginalNodeId(node);
+                currentSourceFile = node;
+                moduleInfo = moduleInfoMap[id];
+                exportFunction = exportFunctionsMap[id];
+                noSubstitution = noSubstitutionMap[id];
+                if (noSubstitution) {
+                    delete noSubstitutionMap[id];
+                }
+                previousOnEmitNode(hint, node, emitCallback);
+                currentSourceFile = undefined;
+                moduleInfo = undefined;
+                exportFunction = undefined;
+                noSubstitution = undefined;
+            }
+            else {
+                previousOnEmitNode(hint, node, emitCallback);
+            }
+        }
+        //
+        // Substitutions
+        //
+        /**
+         * Hooks node substitutions.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to substitute.
+         */
+        function onSubstituteNode(hint, node) {
+            node = previousOnSubstituteNode(hint, node);
+            if (isSubstitutionPrevented(node)) {
+                return node;
+            }
+            if (hint === 1 /* Expression */) {
+                return substituteExpression(node);
+            }
+            else if (hint === 4 /* Unspecified */) {
+                return substituteUnspecified(node);
+            }
+            return node;
+        }
+        /**
+         * Substitute the node, if necessary.
+         *
+         * @param node The node to substitute.
+         */
+        function substituteUnspecified(node) {
+            switch (node.kind) {
+                case 271 /* ShorthandPropertyAssignment */:
+                    return substituteShorthandPropertyAssignment(node);
+            }
+            return node;
+        }
+        /**
+         * Substitution for a ShorthandPropertyAssignment whose name that may contain an imported or exported symbol.
+         *
+         * @param node The node to substitute.
+         */
+        function substituteShorthandPropertyAssignment(node) {
+            var name = node.name;
+            if (!ts.isGeneratedIdentifier(name) && !ts.isLocalName(name)) {
+                var importDeclaration = resolver.getReferencedImportDeclaration(name);
+                if (importDeclaration) {
+                    if (ts.isImportClause(importDeclaration)) {
+                        return ts.setTextRange(ts.createPropertyAssignment(ts.getSynthesizedClone(name), ts.createPropertyAccess(ts.getGeneratedNameForNode(importDeclaration.parent), ts.createIdentifier("default"))), 
+                        /*location*/ node);
+                    }
+                    else if (ts.isImportSpecifier(importDeclaration)) {
+                        return ts.setTextRange(ts.createPropertyAssignment(ts.getSynthesizedClone(name), ts.createPropertyAccess(ts.getGeneratedNameForNode(importDeclaration.parent.parent.parent), ts.getSynthesizedClone(importDeclaration.propertyName || importDeclaration.name))), 
+                        /*location*/ node);
+                    }
+                }
+            }
+            return node;
+        }
+        /**
+         * Substitute the expression, if necessary.
+         *
+         * @param node The node to substitute.
+         */
+        function substituteExpression(node) {
+            switch (node.kind) {
+                case 71 /* Identifier */:
+                    return substituteExpressionIdentifier(node);
+                case 200 /* BinaryExpression */:
+                    return substituteBinaryExpression(node);
+                case 198 /* PrefixUnaryExpression */:
+                case 199 /* PostfixUnaryExpression */:
+                    return substituteUnaryExpression(node);
+            }
+            return node;
+        }
+        /**
+         * Substitution for an Identifier expression that may contain an imported or exported symbol.
+         *
+         * @param node The node to substitute.
+         */
+        function substituteExpressionIdentifier(node) {
+            if (ts.getEmitFlags(node) & 4096 /* HelperName */) {
+                var externalHelpersModuleName = ts.getExternalHelpersModuleName(currentSourceFile);
+                if (externalHelpersModuleName) {
+                    return ts.createPropertyAccess(externalHelpersModuleName, node);
+                }
+                return node;
+            }
+            // When we see an identifier in an expression position that
+            // points to an imported symbol, we should substitute a qualified
+            // reference to the imported symbol if one is needed.
+            //
+            // - We do not substitute generated identifiers for any reason.
+            // - We do not substitute identifiers tagged with the LocalName flag.
+            if (!ts.isGeneratedIdentifier(node) && !ts.isLocalName(node)) {
+                var importDeclaration = resolver.getReferencedImportDeclaration(node);
+                if (importDeclaration) {
+                    if (ts.isImportClause(importDeclaration)) {
+                        return ts.setTextRange(ts.createPropertyAccess(ts.getGeneratedNameForNode(importDeclaration.parent), ts.createIdentifier("default")), 
+                        /*location*/ node);
+                    }
+                    else if (ts.isImportSpecifier(importDeclaration)) {
+                        return ts.setTextRange(ts.createPropertyAccess(ts.getGeneratedNameForNode(importDeclaration.parent.parent.parent), ts.getSynthesizedClone(importDeclaration.propertyName || importDeclaration.name)), 
+                        /*location*/ node);
+                    }
+                }
+            }
+            return node;
+        }
+        /**
+         * Substitution for a BinaryExpression that may contain an imported or exported symbol.
+         *
+         * @param node The node to substitute.
+         */
+        function substituteBinaryExpression(node) {
+            // When we see an assignment expression whose left-hand side is an exported symbol,
+            // we should ensure all exports of that symbol are updated with the correct value.
+            //
+            // - We do not substitute generated identifiers for any reason.
+            // - We do not substitute identifiers tagged with the LocalName flag.
+            // - We do not substitute identifiers that were originally the name of an enum or
+            //   namespace due to how they are transformed in TypeScript.
+            // - We only substitute identifiers that are exported at the top level.
+            if (ts.isAssignmentOperator(node.operatorToken.kind)
+                && ts.isIdentifier(node.left)
+                && !ts.isGeneratedIdentifier(node.left)
+                && !ts.isLocalName(node.left)
+                && !ts.isDeclarationNameOfEnumOrNamespace(node.left)) {
+                var exportedNames = getExports(node.left);
+                if (exportedNames) {
+                    // For each additional export of the declaration, apply an export assignment.
+                    var expression = node;
+                    for (var _i = 0, exportedNames_4 = exportedNames; _i < exportedNames_4.length; _i++) {
+                        var exportName = exportedNames_4[_i];
+                        expression = createExportExpression(exportName, preventSubstitution(expression));
+                    }
+                    return expression;
+                }
+            }
+            return node;
+        }
+        /**
+         * Substitution for a UnaryExpression that may contain an imported or exported symbol.
+         *
+         * @param node The node to substitute.
+         */
+        function substituteUnaryExpression(node) {
+            // When we see a prefix or postfix increment expression whose operand is an exported
+            // symbol, we should ensure all exports of that symbol are updated with the correct
+            // value.
+            //
+            // - We do not substitute generated identifiers for any reason.
+            // - We do not substitute identifiers tagged with the LocalName flag.
+            // - We do not substitute identifiers that were originally the name of an enum or
+            //   namespace due to how they are transformed in TypeScript.
+            // - We only substitute identifiers that are exported at the top level.
+            if ((node.operator === 43 /* PlusPlusToken */ || node.operator === 44 /* MinusMinusToken */)
+                && ts.isIdentifier(node.operand)
+                && !ts.isGeneratedIdentifier(node.operand)
+                && !ts.isLocalName(node.operand)
+                && !ts.isDeclarationNameOfEnumOrNamespace(node.operand)) {
+                var exportedNames = getExports(node.operand);
+                if (exportedNames) {
+                    var expression = node.kind === 199 /* PostfixUnaryExpression */
+                        ? ts.setTextRange(ts.createPrefix(node.operator, node.operand), node)
+                        : node;
+                    for (var _i = 0, exportedNames_5 = exportedNames; _i < exportedNames_5.length; _i++) {
+                        var exportName = exportedNames_5[_i];
+                        expression = createExportExpression(exportName, preventSubstitution(expression));
+                    }
+                    if (node.kind === 199 /* PostfixUnaryExpression */) {
+                        expression = node.operator === 43 /* PlusPlusToken */
+                            ? ts.createSubtract(preventSubstitution(expression), ts.createLiteral(1))
+                            : ts.createAdd(preventSubstitution(expression), ts.createLiteral(1));
+                    }
+                    return expression;
+                }
+            }
+            return node;
+        }
+        /**
+         * Gets the exports of a name.
+         *
+         * @param name The name.
+         */
+        function getExports(name) {
+            var exportedNames;
+            if (!ts.isGeneratedIdentifier(name)) {
+                var valueDeclaration = resolver.getReferencedImportDeclaration(name)
+                    || resolver.getReferencedValueDeclaration(name);
+                if (valueDeclaration) {
+                    var exportContainer = resolver.getReferencedExportContainer(name, /*prefixLocals*/ false);
+                    if (exportContainer && exportContainer.kind === 274 /* SourceFile */) {
+                        exportedNames = ts.append(exportedNames, ts.getDeclarationName(valueDeclaration));
+                    }
+                    exportedNames = ts.addRange(exportedNames, moduleInfo && moduleInfo.exportedBindings[ts.getOriginalNodeId(valueDeclaration)]);
+                }
+            }
+            return exportedNames;
+        }
+        /**
+         * Prevent substitution of a node for this transformer.
+         *
+         * @param node The node which should not be substituted.
+         */
+        function preventSubstitution(node) {
+            if (noSubstitution === undefined)
+                noSubstitution = [];
+            noSubstitution[ts.getNodeId(node)] = true;
+            return node;
+        }
+        /**
+         * Determines whether a node should not be substituted.
+         *
+         * @param node The node to test.
+         */
+        function isSubstitutionPrevented(node) {
+            return noSubstitution && node.id && noSubstitution[node.id];
+        }
+    }
+    ts.transformSystemModule = transformSystemModule;
+})(ts || (ts = {}));
+/*@internal*/
+var ts;
+(function (ts) {
+    function transformES2015Module(context) {
+        var compilerOptions = context.getCompilerOptions();
+        var previousOnEmitNode = context.onEmitNode;
+        var previousOnSubstituteNode = context.onSubstituteNode;
+        context.onEmitNode = onEmitNode;
+        context.onSubstituteNode = onSubstituteNode;
+        context.enableEmitNotification(274 /* SourceFile */);
+        context.enableSubstitution(71 /* Identifier */);
+        var currentSourceFile;
+        return ts.chainBundle(transformSourceFile);
+        function transformSourceFile(node) {
+            if (node.isDeclarationFile) {
+                return node;
+            }
+            if (ts.isExternalModule(node) || compilerOptions.isolatedModules) {
+                var externalHelpersModuleName = ts.getOrCreateExternalHelpersModuleNameIfNeeded(node, compilerOptions);
+                if (externalHelpersModuleName) {
+                    var statements = [];
+                    var statementOffset = ts.addPrologue(statements, node.statements);
+                    var tslibImport = ts.createImportDeclaration(
+                    /*decorators*/ undefined, 
+                    /*modifiers*/ undefined, ts.createImportClause(/*name*/ undefined, ts.createNamespaceImport(externalHelpersModuleName)), ts.createLiteral(ts.externalHelpersModuleNameText));
+                    ts.addEmitFlags(tslibImport, 67108864 /* NeverApplyImportHelper */);
+                    ts.append(statements, tslibImport);
+                    ts.addRange(statements, ts.visitNodes(node.statements, visitor, ts.isStatement, statementOffset));
+                    return ts.updateSourceFileNode(node, ts.setTextRange(ts.createNodeArray(statements), node.statements));
+                }
+                else {
+                    return ts.visitEachChild(node, visitor, context);
+                }
+            }
+            return node;
+        }
+        function visitor(node) {
+            switch (node.kind) {
+                case 243 /* ImportEqualsDeclaration */:
+                    // Elide `import=` as it is not legal with --module ES6
+                    return undefined;
+                case 249 /* ExportAssignment */:
+                    return visitExportAssignment(node);
+            }
+            return node;
+        }
+        function visitExportAssignment(node) {
+            // Elide `export=` as it is not legal with --module ES6
+            return node.isExportEquals ? undefined : node;
+        }
+        //
+        // Emit Notification
+        //
+        /**
+         * Hook for node emit.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to emit.
+         * @param emit A callback used to emit the node in the printer.
+         */
+        function onEmitNode(hint, node, emitCallback) {
+            if (ts.isSourceFile(node)) {
+                currentSourceFile = node;
+                previousOnEmitNode(hint, node, emitCallback);
+                currentSourceFile = undefined;
+            }
+            else {
+                previousOnEmitNode(hint, node, emitCallback);
+            }
+        }
+        //
+        // Substitutions
+        //
+        /**
+         * Hooks node substitutions.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to substitute.
+         */
+        function onSubstituteNode(hint, node) {
+            node = previousOnSubstituteNode(hint, node);
+            if (ts.isIdentifier(node) && hint === 1 /* Expression */) {
+                return substituteExpressionIdentifier(node);
+            }
+            return node;
+        }
+        function substituteExpressionIdentifier(node) {
+            if (ts.getEmitFlags(node) & 4096 /* HelperName */) {
+                var externalHelpersModuleName = ts.getExternalHelpersModuleName(currentSourceFile);
+                if (externalHelpersModuleName) {
+                    return ts.createPropertyAccess(externalHelpersModuleName, node);
+                }
+            }
+            return node;
+        }
+    }
+    ts.transformES2015Module = transformES2015Module;
+})(ts || (ts = {}));
+/* @internal */
+var ts;
+(function (ts) {
+    function canProduceDiagnostics(node) {
+        return ts.isVariableDeclaration(node) ||
+            ts.isPropertyDeclaration(node) ||
+            ts.isPropertySignature(node) ||
+            ts.isBindingElement(node) ||
+            ts.isSetAccessor(node) ||
+            ts.isGetAccessor(node) ||
+            ts.isConstructSignatureDeclaration(node) ||
+            ts.isCallSignatureDeclaration(node) ||
+            ts.isMethodDeclaration(node) ||
+            ts.isMethodSignature(node) ||
+            ts.isFunctionDeclaration(node) ||
+            ts.isParameter(node) ||
+            ts.isTypeParameterDeclaration(node) ||
+            ts.isExpressionWithTypeArguments(node) ||
+            ts.isImportEqualsDeclaration(node) ||
+            ts.isTypeAliasDeclaration(node) ||
+            ts.isConstructorDeclaration(node) ||
+            ts.isIndexSignatureDeclaration(node);
+    }
+    ts.canProduceDiagnostics = canProduceDiagnostics;
+    function createGetSymbolAccessibilityDiagnosticForNodeName(node) {
+        if (ts.isSetAccessor(node) || ts.isGetAccessor(node)) {
+            return getAccessorNameVisibilityError;
+        }
+        else if (ts.isMethodSignature(node) || ts.isMethodDeclaration(node)) {
+            return getMethodNameVisibilityError;
+        }
+        else {
+            return createGetSymbolAccessibilityDiagnosticForNode(node);
+        }
+        function getAccessorNameVisibilityError(symbolAccessibilityResult) {
+            var diagnosticMessage = getAccessorNameVisibilityDiagnosticMessage(symbolAccessibilityResult);
+            return diagnosticMessage !== undefined ? {
+                diagnosticMessage: diagnosticMessage,
+                errorNode: node,
+                typeName: node.name
+            } : undefined;
+        }
+        function getAccessorNameVisibilityDiagnosticMessage(symbolAccessibilityResult) {
+            if (ts.hasModifier(node, 32 /* Static */)) {
+                return symbolAccessibilityResult.errorModuleName ?
+                    symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                        ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                        ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                    ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_private_name_1;
+            }
+            else if (node.parent.kind === 235 /* ClassDeclaration */) {
+                return symbolAccessibilityResult.errorModuleName ?
+                    symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                        ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                        ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                    ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_private_name_1;
+            }
+            else {
+                return symbolAccessibilityResult.errorModuleName ?
+                    ts.Diagnostics.Property_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2 :
+                    ts.Diagnostics.Property_0_of_exported_interface_has_or_is_using_private_name_1;
+            }
+        }
+        function getMethodNameVisibilityError(symbolAccessibilityResult) {
+            var diagnosticMessage = getMethodNameVisibilityDiagnosticMessage(symbolAccessibilityResult);
+            return diagnosticMessage !== undefined ? {
+                diagnosticMessage: diagnosticMessage,
+                errorNode: node,
+                typeName: node.name
+            } : undefined;
+        }
+        function getMethodNameVisibilityDiagnosticMessage(symbolAccessibilityResult) {
+            if (ts.hasModifier(node, 32 /* Static */)) {
+                return symbolAccessibilityResult.errorModuleName ?
+                    symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                        ts.Diagnostics.Public_static_method_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                        ts.Diagnostics.Public_static_method_0_of_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                    ts.Diagnostics.Public_static_method_0_of_exported_class_has_or_is_using_private_name_1;
+            }
+            else if (node.parent.kind === 235 /* ClassDeclaration */) {
+                return symbolAccessibilityResult.errorModuleName ?
+                    symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                        ts.Diagnostics.Public_method_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                        ts.Diagnostics.Public_method_0_of_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                    ts.Diagnostics.Public_method_0_of_exported_class_has_or_is_using_private_name_1;
+            }
+            else {
+                return symbolAccessibilityResult.errorModuleName ?
+                    ts.Diagnostics.Method_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2 :
+                    ts.Diagnostics.Method_0_of_exported_interface_has_or_is_using_private_name_1;
+            }
+        }
+    }
+    ts.createGetSymbolAccessibilityDiagnosticForNodeName = createGetSymbolAccessibilityDiagnosticForNodeName;
+    function createGetSymbolAccessibilityDiagnosticForNode(node) {
+        if (ts.isVariableDeclaration(node) || ts.isPropertyDeclaration(node) || ts.isPropertySignature(node) || ts.isBindingElement(node) || ts.isConstructorDeclaration(node)) {
+            return getVariableDeclarationTypeVisibilityError;
+        }
+        else if (ts.isSetAccessor(node) || ts.isGetAccessor(node)) {
+            return getAccessorDeclarationTypeVisibilityError;
+        }
+        else if (ts.isConstructSignatureDeclaration(node) || ts.isCallSignatureDeclaration(node) || ts.isMethodDeclaration(node) || ts.isMethodSignature(node) || ts.isFunctionDeclaration(node) || ts.isIndexSignatureDeclaration(node)) {
+            return getReturnTypeVisibilityError;
+        }
+        else if (ts.isParameter(node)) {
+            if (ts.isParameterPropertyDeclaration(node) && ts.hasModifier(node.parent, 8 /* Private */)) {
+                return getVariableDeclarationTypeVisibilityError;
+            }
+            return getParameterDeclarationTypeVisibilityError;
+        }
+        else if (ts.isTypeParameterDeclaration(node)) {
+            return getTypeParameterConstraintVisibilityError;
+        }
+        else if (ts.isExpressionWithTypeArguments(node)) {
+            return getHeritageClauseVisibilityError;
+        }
+        else if (ts.isImportEqualsDeclaration(node)) {
+            return getImportEntityNameVisibilityError;
+        }
+        else if (ts.isTypeAliasDeclaration(node)) {
+            return getTypeAliasDeclarationVisibilityError;
+        }
+        else {
+            return ts.Debug.assertNever(node, "Attempted to set a declaration diagnostic context for unhandled node kind: " + ts.SyntaxKind[node.kind]);
+        }
+        function getVariableDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult) {
+            if (node.kind === 232 /* VariableDeclaration */ || node.kind === 182 /* BindingElement */) {
+                return symbolAccessibilityResult.errorModuleName ?
+                    symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                        ts.Diagnostics.Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                        ts.Diagnostics.Exported_variable_0_has_or_is_using_name_1_from_private_module_2 :
+                    ts.Diagnostics.Exported_variable_0_has_or_is_using_private_name_1;
+            }
+            // This check is to ensure we don't report error on constructor parameter property as that error would be reported during parameter emit
+            // The only exception here is if the constructor was marked as private. we are not emitting the constructor parameters at all.
+            else if (node.kind === 152 /* PropertyDeclaration */ || node.kind === 151 /* PropertySignature */ ||
+                (node.kind === 149 /* Parameter */ && ts.hasModifier(node.parent, 8 /* Private */))) {
+                // TODO(jfreeman): Deal with computed properties in error reporting.
+                if (ts.hasModifier(node, 32 /* Static */)) {
+                    return symbolAccessibilityResult.errorModuleName ?
+                        symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                            ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                            ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                        ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_private_name_1;
+                }
+                else if (node.parent.kind === 235 /* ClassDeclaration */ || node.kind === 149 /* Parameter */) {
+                    return symbolAccessibilityResult.errorModuleName ?
+                        symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                            ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                            ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                        ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_private_name_1;
+                }
+                else {
+                    // Interfaces cannot have types that cannot be named
+                    return symbolAccessibilityResult.errorModuleName ?
+                        ts.Diagnostics.Property_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2 :
+                        ts.Diagnostics.Property_0_of_exported_interface_has_or_is_using_private_name_1;
+                }
+            }
+        }
+        function getVariableDeclarationTypeVisibilityError(symbolAccessibilityResult) {
+            var diagnosticMessage = getVariableDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult);
+            return diagnosticMessage !== undefined ? {
+                diagnosticMessage: diagnosticMessage,
+                errorNode: node,
+                typeName: node.name
+            } : undefined;
+        }
+        function getAccessorDeclarationTypeVisibilityError(symbolAccessibilityResult) {
+            var diagnosticMessage;
+            if (node.kind === 157 /* SetAccessor */) {
+                // Getters can infer the return type from the returned expression, but setters cannot, so the
+                // "_from_external_module_1_but_cannot_be_named" case cannot occur.
+                if (ts.hasModifier(node, 32 /* Static */)) {
+                    diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                        ts.Diagnostics.Parameter_type_of_public_static_setter_0_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                        ts.Diagnostics.Parameter_type_of_public_static_setter_0_from_exported_class_has_or_is_using_private_name_1;
+                }
+                else {
+                    diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                        ts.Diagnostics.Parameter_type_of_public_setter_0_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                        ts.Diagnostics.Parameter_type_of_public_setter_0_from_exported_class_has_or_is_using_private_name_1;
+                }
+            }
+            else {
+                if (ts.hasModifier(node, 32 /* Static */)) {
+                    diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                        symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                            ts.Diagnostics.Return_type_of_public_static_getter_0_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                            ts.Diagnostics.Return_type_of_public_static_getter_0_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                        ts.Diagnostics.Return_type_of_public_static_getter_0_from_exported_class_has_or_is_using_private_name_1;
+                }
+                else {
+                    diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                        symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                            ts.Diagnostics.Return_type_of_public_getter_0_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                            ts.Diagnostics.Return_type_of_public_getter_0_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                        ts.Diagnostics.Return_type_of_public_getter_0_from_exported_class_has_or_is_using_private_name_1;
+                }
+            }
+            return {
+                diagnosticMessage: diagnosticMessage,
+                errorNode: node.name,
+                typeName: node.name
+            };
+        }
+        function getReturnTypeVisibilityError(symbolAccessibilityResult) {
+            var diagnosticMessage;
+            switch (node.kind) {
+                case 159 /* ConstructSignature */:
+                    // Interfaces cannot have return types that cannot be named
+                    diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                        ts.Diagnostics.Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
+                        ts.Diagnostics.Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_0;
+                    break;
+                case 158 /* CallSignature */:
+                    // Interfaces cannot have return types that cannot be named
+                    diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                        ts.Diagnostics.Return_type_of_call_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
+                        ts.Diagnostics.Return_type_of_call_signature_from_exported_interface_has_or_is_using_private_name_0;
+                    break;
+                case 160 /* IndexSignature */:
+                    // Interfaces cannot have return types that cannot be named
+                    diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                        ts.Diagnostics.Return_type_of_index_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
+                        ts.Diagnostics.Return_type_of_index_signature_from_exported_interface_has_or_is_using_private_name_0;
+                    break;
+                case 154 /* MethodDeclaration */:
+                case 153 /* MethodSignature */:
+                    if (ts.hasModifier(node, 32 /* Static */)) {
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
+                                ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
+                            ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_private_name_0;
+                    }
+                    else if (node.parent.kind === 235 /* ClassDeclaration */) {
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
+                                ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
+                            ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_private_name_0;
+                    }
+                    else {
+                        // Interfaces cannot have return types that cannot be named
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Return_type_of_method_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
+                            ts.Diagnostics.Return_type_of_method_from_exported_interface_has_or_is_using_private_name_0;
+                    }
+                    break;
+                case 234 /* FunctionDeclaration */:
+                    diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                        symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                            ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
+                            ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_name_0_from_private_module_1 :
+                        ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_private_name_0;
+                    break;
+                default:
+                    return ts.Debug.fail("This is unknown kind for signature: " + node.kind);
+            }
+            return {
+                diagnosticMessage: diagnosticMessage,
+                errorNode: node.name || node
+            };
+        }
+        function getParameterDeclarationTypeVisibilityError(symbolAccessibilityResult) {
+            var diagnosticMessage = getParameterDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult);
+            return diagnosticMessage !== undefined ? {
+                diagnosticMessage: diagnosticMessage,
+                errorNode: node,
+                typeName: node.name
+            } : undefined;
+        }
+        function getParameterDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult) {
+            switch (node.parent.kind) {
+                case 155 /* Constructor */:
+                    return symbolAccessibilityResult.errorModuleName ?
+                        symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                            ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                            ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                        ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_private_name_1;
+                case 159 /* ConstructSignature */:
+                case 164 /* ConstructorType */:
+                    // Interfaces cannot have parameter types that cannot be named
+                    return symbolAccessibilityResult.errorModuleName ?
+                        ts.Diagnostics.Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
+                        ts.Diagnostics.Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1;
+                case 158 /* CallSignature */:
+                    // Interfaces cannot have parameter types that cannot be named
+                    return symbolAccessibilityResult.errorModuleName ?
+                        ts.Diagnostics.Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
+                        ts.Diagnostics.Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1;
+                case 160 /* IndexSignature */:
+                    // Interfaces cannot have parameter types that cannot be named
+                    return symbolAccessibilityResult.errorModuleName ?
+                        ts.Diagnostics.Parameter_0_of_index_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
+                        ts.Diagnostics.Parameter_0_of_index_signature_from_exported_interface_has_or_is_using_private_name_1;
+                case 154 /* MethodDeclaration */:
+                case 153 /* MethodSignature */:
+                    if (ts.hasModifier(node.parent, 32 /* Static */)) {
+                        return symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                                ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1;
+                    }
+                    else if (node.parent.parent.kind === 235 /* ClassDeclaration */) {
+                        return symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                                ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1;
+                    }
+                    else {
+                        // Interfaces cannot have parameter types that cannot be named
+                        return symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Parameter_0_of_method_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1;
+                    }
+                case 234 /* FunctionDeclaration */:
+                case 163 /* FunctionType */:
+                    return symbolAccessibilityResult.errorModuleName ?
+                        symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                            ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                            ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_name_1_from_private_module_2 :
+                        ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_private_name_1;
+                default:
+                    return ts.Debug.fail("Unknown parent for parameter: " + ts.SyntaxKind[node.parent.kind]);
+            }
+        }
+        function getTypeParameterConstraintVisibilityError() {
+            // Type parameter constraints are named by user so we should always be able to name it
+            var diagnosticMessage;
+            switch (node.parent.kind) {
+                case 235 /* ClassDeclaration */:
+                    diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_class_has_or_is_using_private_name_1;
+                    break;
+                case 236 /* InterfaceDeclaration */:
+                    diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1;
+                    break;
+                case 159 /* ConstructSignature */:
+                    diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1;
+                    break;
+                case 158 /* CallSignature */:
+                    diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1;
+                    break;
+                case 154 /* MethodDeclaration */:
+                case 153 /* MethodSignature */:
+                    if (ts.hasModifier(node.parent, 32 /* Static */)) {
+                        diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1;
+                    }
+                    else if (node.parent.parent.kind === 235 /* ClassDeclaration */) {
+                        diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1;
+                    }
+                    else {
+                        diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1;
+                    }
+                    break;
+                case 234 /* FunctionDeclaration */:
+                    diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_function_has_or_is_using_private_name_1;
+                    break;
+                case 237 /* TypeAliasDeclaration */:
+                    diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_type_alias_has_or_is_using_private_name_1;
+                    break;
+                default:
+                    return ts.Debug.fail("This is unknown parent for type parameter: " + node.parent.kind);
+            }
+            return {
+                diagnosticMessage: diagnosticMessage,
+                errorNode: node,
+                typeName: node.name
+            };
+        }
+        function getHeritageClauseVisibilityError() {
+            var diagnosticMessage;
+            // Heritage clause is written by user so it can always be named
+            if (node.parent.parent.kind === 235 /* ClassDeclaration */) {
+                // Class or Interface implemented/extended is inaccessible
+                diagnosticMessage = node.parent.token === 108 /* ImplementsKeyword */ ?
+                    ts.Diagnostics.Implements_clause_of_exported_class_0_has_or_is_using_private_name_1 :
+                    ts.Diagnostics.extends_clause_of_exported_class_0_has_or_is_using_private_name_1;
+            }
+            else {
+                // interface is inaccessible
+                diagnosticMessage = ts.Diagnostics.extends_clause_of_exported_interface_0_has_or_is_using_private_name_1;
+            }
+            return {
+                diagnosticMessage: diagnosticMessage,
+                errorNode: node,
+                typeName: ts.getNameOfDeclaration(node.parent.parent)
+            };
+        }
+        function getImportEntityNameVisibilityError() {
+            return {
+                diagnosticMessage: ts.Diagnostics.Import_declaration_0_is_using_private_name_1,
+                errorNode: node,
+                typeName: node.name
+            };
+        }
+        function getTypeAliasDeclarationVisibilityError() {
+            return {
+                diagnosticMessage: ts.Diagnostics.Exported_type_alias_0_has_or_is_using_private_name_1,
+                errorNode: node.type,
+                typeName: node.name
+            };
+        }
+    }
+    ts.createGetSymbolAccessibilityDiagnosticForNode = createGetSymbolAccessibilityDiagnosticForNode;
+})(ts || (ts = {}));
+/*@internal*/
+var ts;
+(function (ts) {
+    function getDeclarationDiagnostics(host, resolver, file) {
+        if (file && ts.isSourceFileJavaScript(file)) {
+            return []; // No declaration diagnostics for js for now
+        }
+        var compilerOptions = host.getCompilerOptions();
+        var result = ts.transformNodes(resolver, host, compilerOptions, file ? [file] : ts.filter(host.getSourceFiles(), ts.isSourceFileNotJavaScript), [transformDeclarations], /*allowDtsFiles*/ false);
+        return result.diagnostics;
+    }
+    ts.getDeclarationDiagnostics = getDeclarationDiagnostics;
+    var declarationEmitNodeBuilderFlags = 1024 /* MultilineObjectLiterals */ |
+        2048 /* WriteClassExpressionAsTypeLiteral */ |
+        4096 /* UseTypeOfFunction */ |
+        8 /* UseStructuralFallback */ |
+        524288 /* AllowEmptyTuple */ |
+        4 /* GenerateNamesForShadowedTypeParams */;
+    /**
+     * Transforms a ts file into a .d.ts file
+     * This process requires type information, which is retrieved through the emit resolver. Because of this,
+     * in many places this transformer assumes it will be operating on parse tree nodes directly.
+     * This means that _no transforms should be allowed to occur before this one_.
+     */
+    function transformDeclarations(context) {
+        var throwDiagnostic = function () { return ts.Debug.fail("Diagnostic emitted without context"); };
+        var getSymbolAccessibilityDiagnostic = throwDiagnostic;
+        var needsDeclare = true;
+        var isBundledEmit = false;
+        var resultHasExternalModuleIndicator = false;
+        var needsScopeFixMarker = false;
+        var resultHasScopeMarker = false;
+        var enclosingDeclaration;
+        var necessaryTypeRefernces;
+        var lateMarkedStatements;
+        var lateStatementReplacementMap;
+        var suppressNewDiagnosticContexts;
+        var host = context.getEmitHost();
+        var symbolTracker = {
+            trackSymbol: trackSymbol,
+            reportInaccessibleThisError: reportInaccessibleThisError,
+            reportInaccessibleUniqueSymbolError: reportInaccessibleUniqueSymbolError,
+            reportPrivateInBaseOfClassExpression: reportPrivateInBaseOfClassExpression,
+            moduleResolverHost: host,
+            trackReferencedAmbientModule: trackReferencedAmbientModule,
+        };
+        var errorNameNode;
+        var currentSourceFile;
+        var refs;
+        var resolver = context.getEmitResolver();
+        var options = context.getCompilerOptions();
+        var newLine = ts.getNewLineCharacter(options);
+        var noResolve = options.noResolve, stripInternal = options.stripInternal;
+        return transformRoot;
+        function recordTypeReferenceDirectivesIfNecessary(typeReferenceDirectives) {
+            if (!typeReferenceDirectives) {
+                return;
+            }
+            necessaryTypeRefernces = necessaryTypeRefernces || ts.createMap();
+            for (var _i = 0, typeReferenceDirectives_2 = typeReferenceDirectives; _i < typeReferenceDirectives_2.length; _i++) {
+                var ref = typeReferenceDirectives_2[_i];
+                necessaryTypeRefernces.set(ref, true);
+            }
+        }
+        function trackReferencedAmbientModule(node) {
+            var container = ts.getSourceFileOfNode(node);
+            refs.set("" + ts.getOriginalNodeId(container), container);
+        }
+        function handleSymbolAccessibilityError(symbolAccessibilityResult) {
+            if (symbolAccessibilityResult.accessibility === 0 /* Accessible */) {
+                // Add aliases back onto the possible imports list if they're not there so we can try them again with updated visibility info
+                if (symbolAccessibilityResult && symbolAccessibilityResult.aliasesToMakeVisible) {
+                    if (!lateMarkedStatements) {
+                        lateMarkedStatements = symbolAccessibilityResult.aliasesToMakeVisible;
+                    }
+                    else {
+                        for (var _i = 0, _a = symbolAccessibilityResult.aliasesToMakeVisible; _i < _a.length; _i++) {
+                            var ref = _a[_i];
+                            ts.pushIfUnique(lateMarkedStatements, ref);
+                        }
+                    }
+                }
+                // TODO: Do all these accessibility checks inside/after the first pass in the checker when declarations are enabled, if possible
+            }
+            else {
+                // Report error
+                var errorInfo = getSymbolAccessibilityDiagnostic(symbolAccessibilityResult);
+                if (errorInfo) {
+                    if (errorInfo.typeName) {
+                        context.addDiagnostic(ts.createDiagnosticForNode(symbolAccessibilityResult.errorNode || errorInfo.errorNode, errorInfo.diagnosticMessage, ts.getTextOfNode(errorInfo.typeName), symbolAccessibilityResult.errorSymbolName, symbolAccessibilityResult.errorModuleName));
+                    }
+                    else {
+                        context.addDiagnostic(ts.createDiagnosticForNode(symbolAccessibilityResult.errorNode || errorInfo.errorNode, errorInfo.diagnosticMessage, symbolAccessibilityResult.errorSymbolName, symbolAccessibilityResult.errorModuleName));
+                    }
+                }
+            }
+        }
+        function trackSymbol(symbol, enclosingDeclaration, meaning) {
+            if (symbol.flags & 262144 /* TypeParameter */)
+                return;
+            handleSymbolAccessibilityError(resolver.isSymbolAccessible(symbol, enclosingDeclaration, meaning, /*shouldComputeAliasesToMakeVisible*/ true));
+            recordTypeReferenceDirectivesIfNecessary(resolver.getTypeReferenceDirectivesForSymbol(symbol, meaning));
+        }
+        function reportPrivateInBaseOfClassExpression(propertyName) {
+            if (errorNameNode) {
+                context.addDiagnostic(ts.createDiagnosticForNode(errorNameNode, ts.Diagnostics.Property_0_of_exported_class_expression_may_not_be_private_or_protected, propertyName));
+            }
+        }
+        function reportInaccessibleUniqueSymbolError() {
+            if (errorNameNode) {
+                context.addDiagnostic(ts.createDiagnosticForNode(errorNameNode, ts.Diagnostics.The_inferred_type_of_0_references_an_inaccessible_1_type_A_type_annotation_is_necessary, ts.declarationNameToString(errorNameNode), "unique symbol"));
+            }
+        }
+        function reportInaccessibleThisError() {
+            if (errorNameNode) {
+                context.addDiagnostic(ts.createDiagnosticForNode(errorNameNode, ts.Diagnostics.The_inferred_type_of_0_references_an_inaccessible_1_type_A_type_annotation_is_necessary, ts.declarationNameToString(errorNameNode), "this"));
+            }
+        }
+        function transformRoot(node) {
+            if (node.kind === 274 /* SourceFile */ && (node.isDeclarationFile || ts.isSourceFileJavaScript(node))) {
+                return node;
+            }
+            if (node.kind === 275 /* Bundle */) {
+                isBundledEmit = true;
+                var refs_1 = ts.createMap();
+                var hasNoDefaultLib_1 = false;
+                var bundle = ts.createBundle(ts.map(node.sourceFiles, function (sourceFile) {
+                    if (sourceFile.isDeclarationFile || ts.isSourceFileJavaScript(sourceFile))
+                        return undefined; // Omit declaration files from bundle results, too // TODO: GH#18217
+                    hasNoDefaultLib_1 = hasNoDefaultLib_1 || sourceFile.hasNoDefaultLib;
+                    currentSourceFile = sourceFile;
+                    enclosingDeclaration = sourceFile;
+                    lateMarkedStatements = undefined;
+                    suppressNewDiagnosticContexts = false;
+                    lateStatementReplacementMap = ts.createMap();
+                    getSymbolAccessibilityDiagnostic = throwDiagnostic;
+                    needsScopeFixMarker = false;
+                    resultHasScopeMarker = false;
+                    collectReferences(sourceFile, refs_1);
+                    if (ts.isExternalModule(sourceFile)) {
+                        resultHasExternalModuleIndicator = false; // unused in external module bundle emit (all external modules are within module blocks, therefore are known to be modules)
+                        needsDeclare = false;
+                        var statements_5 = ts.visitNodes(sourceFile.statements, visitDeclarationStatements);
+                        var newFile = ts.updateSourceFileNode(sourceFile, [ts.createModuleDeclaration([], [ts.createModifier(124 /* DeclareKeyword */)], ts.createLiteral(ts.getResolvedExternalModuleName(context.getEmitHost(), sourceFile)), ts.createModuleBlock(ts.setTextRange(ts.createNodeArray(transformAndReplaceLatePaintedStatements(statements_5)), sourceFile.statements)))], /*isDeclarationFile*/ true, /*referencedFiles*/ [], /*typeReferences*/ [], /*hasNoDefaultLib*/ false, /*libReferences*/ []);
+                        return newFile;
+                    }
+                    needsDeclare = true;
+                    var updated = ts.visitNodes(sourceFile.statements, visitDeclarationStatements);
+                    return ts.updateSourceFileNode(sourceFile, transformAndReplaceLatePaintedStatements(updated), /*isDeclarationFile*/ true, /*referencedFiles*/ [], /*typeReferences*/ [], /*hasNoDefaultLib*/ false, /*libReferences*/ []);
+                }), ts.mapDefined(node.prepends, function (prepend) {
+                    if (prepend.kind === 277 /* InputFiles */) {
+                        return ts.createUnparsedSourceFile(prepend.declarationText, prepend.declarationMapText);
+                    }
+                }));
+                bundle.syntheticFileReferences = [];
+                bundle.syntheticTypeReferences = getFileReferencesForUsedTypeReferences();
+                bundle.hasNoDefaultLib = hasNoDefaultLib_1;
+                var outputFilePath_1 = ts.getDirectoryPath(ts.normalizeSlashes(ts.getOutputPathsFor(node, host, /*forceDtsPaths*/ true).declarationFilePath));
+                var referenceVisitor_1 = mapReferencesIntoArray(bundle.syntheticFileReferences, outputFilePath_1);
+                refs_1.forEach(referenceVisitor_1);
+                return bundle;
+            }
+            // Single source file
+            needsDeclare = true;
+            needsScopeFixMarker = false;
+            resultHasScopeMarker = false;
+            enclosingDeclaration = node;
+            currentSourceFile = node;
+            getSymbolAccessibilityDiagnostic = throwDiagnostic;
+            isBundledEmit = false;
+            resultHasExternalModuleIndicator = false;
+            suppressNewDiagnosticContexts = false;
+            lateMarkedStatements = undefined;
+            lateStatementReplacementMap = ts.createMap();
+            necessaryTypeRefernces = undefined;
+            refs = collectReferences(currentSourceFile, ts.createMap());
+            var references = [];
+            var outputFilePath = ts.getDirectoryPath(ts.normalizeSlashes(ts.getOutputPathsFor(node, host, /*forceDtsPaths*/ true).declarationFilePath));
+            var referenceVisitor = mapReferencesIntoArray(references, outputFilePath);
+            var statements = ts.visitNodes(node.statements, visitDeclarationStatements);
+            var combinedStatements = ts.setTextRange(ts.createNodeArray(transformAndReplaceLatePaintedStatements(statements)), node.statements);
+            refs.forEach(referenceVisitor);
+            var emittedImports = ts.filter(combinedStatements, ts.isAnyImportSyntax);
+            if (ts.isExternalModule(node) && (!resultHasExternalModuleIndicator || (needsScopeFixMarker && !resultHasScopeMarker))) {
+                combinedStatements = ts.setTextRange(ts.createNodeArray(combinedStatements.concat([ts.createExportDeclaration(/*decorators*/ undefined, /*modifiers*/ undefined, ts.createNamedExports([]), /*moduleSpecifier*/ undefined)])), combinedStatements);
+            }
+            var updated = ts.updateSourceFileNode(node, combinedStatements, /*isDeclarationFile*/ true, references, getFileReferencesForUsedTypeReferences(), node.hasNoDefaultLib);
+            return updated;
+            function getFileReferencesForUsedTypeReferences() {
+                return necessaryTypeRefernces ? ts.mapDefined(ts.arrayFrom(necessaryTypeRefernces.keys()), getFileReferenceForTypeName) : [];
+            }
+            function getFileReferenceForTypeName(typeName) {
+                // Elide type references for which we have imports
+                if (emittedImports) {
+                    for (var _i = 0, emittedImports_1 = emittedImports; _i < emittedImports_1.length; _i++) {
+                        var importStatement = emittedImports_1[_i];
+                        if (ts.isImportEqualsDeclaration(importStatement) && ts.isExternalModuleReference(importStatement.moduleReference)) {
+                            var expr = importStatement.moduleReference.expression;
+                            if (ts.isStringLiteralLike(expr) && expr.text === typeName) {
+                                return undefined;
+                            }
+                        }
+                        else if (ts.isImportDeclaration(importStatement) && ts.isStringLiteral(importStatement.moduleSpecifier) && importStatement.moduleSpecifier.text === typeName) {
+                            return undefined;
+                        }
+                    }
+                }
+                return { fileName: typeName, pos: -1, end: -1 };
+            }
+            function mapReferencesIntoArray(references, outputFilePath) {
+                return function (file) {
+                    var declFileName;
+                    if (file.isDeclarationFile) { // Neither decl files or js should have their refs changed
+                        declFileName = file.fileName;
+                    }
+                    else {
+                        if (isBundledEmit && ts.contains(node.sourceFiles, file))
+                            return; // Omit references to files which are being merged
+                        var paths = ts.getOutputPathsFor(file, host, /*forceDtsPaths*/ true);
+                        declFileName = paths.declarationFilePath || paths.jsFilePath;
+                    }
+                    if (declFileName) {
+                        var fileName = ts.getRelativePathToDirectoryOrUrl(outputFilePath, declFileName, host.getCurrentDirectory(), host.getCanonicalFileName, 
+                        /*isAbsolutePathAnUrl*/ false);
+                        if (ts.startsWith(fileName, "./") && ts.hasExtension(fileName)) {
+                            fileName = fileName.substring(2);
+                        }
+                        references.push({ pos: -1, end: -1, fileName: fileName });
+                    }
+                };
+            }
+        }
+        function collectReferences(sourceFile, ret) {
+            if (noResolve || ts.isSourceFileJavaScript(sourceFile))
+                return ret;
+            ts.forEach(sourceFile.referencedFiles, function (f) {
+                var elem = ts.tryResolveScriptReference(host, sourceFile, f);
+                if (elem) {
+                    ret.set("" + ts.getOriginalNodeId(elem), elem);
+                }
+            });
+            return ret;
+        }
+        function filterBindingPatternInitializers(name) {
+            if (name.kind === 71 /* Identifier */) {
+                return name;
+            }
+            else {
+                if (name.kind === 181 /* ArrayBindingPattern */) {
+                    return ts.updateArrayBindingPattern(name, ts.visitNodes(name.elements, visitBindingElement));
+                }
+                else {
+                    return ts.updateObjectBindingPattern(name, ts.visitNodes(name.elements, visitBindingElement));
+                }
+            }
+            function visitBindingElement(elem) {
+                if (elem.kind === 206 /* OmittedExpression */) {
+                    return elem;
+                }
+                return ts.updateBindingElement(elem, elem.dotDotDotToken, elem.propertyName, filterBindingPatternInitializers(elem.name), shouldPrintWithInitializer(elem) ? elem.initializer : undefined);
+            }
+        }
+        function ensureParameter(p, modifierMask) {
+            var oldDiag;
+            if (!suppressNewDiagnosticContexts) {
+                oldDiag = getSymbolAccessibilityDiagnostic;
+                getSymbolAccessibilityDiagnostic = ts.createGetSymbolAccessibilityDiagnosticForNode(p);
+            }
+            var newParam = ts.updateParameter(p, 
+            /*decorators*/ undefined, maskModifiers(p, modifierMask), p.dotDotDotToken, filterBindingPatternInitializers(p.name), resolver.isOptionalParameter(p) ? (p.questionToken || ts.createToken(55 /* QuestionToken */)) : undefined, ensureType(p, p.type, /*ignorePrivate*/ true), // Ignore private param props, since this type is going straight back into a param
+            ensureNoInitializer(p));
+            if (!suppressNewDiagnosticContexts) {
+                getSymbolAccessibilityDiagnostic = oldDiag;
+            }
+            return newParam;
+        }
+        function shouldPrintWithInitializer(node) {
+            return canHaveLiteralInitializer(node) && resolver.isLiteralConstDeclaration(ts.getParseTreeNode(node)); // TODO: Make safe
+        }
+        function ensureNoInitializer(node) {
+            if (shouldPrintWithInitializer(node)) {
+                return resolver.createLiteralConstValue(ts.getParseTreeNode(node)); // TODO: Make safe
+            }
+            return undefined;
+        }
+        function ensureType(node, type, ignorePrivate) {
+            if (!ignorePrivate && ts.hasModifier(node, 8 /* Private */)) {
+                // Private nodes emit no types (except private parameter properties, whose parameter types are actually visible)
+                return;
+            }
+            if (shouldPrintWithInitializer(node)) {
+                // Literal const declarations will have an initializer ensured rather than a type
+                return;
+            }
+            var shouldUseResolverType = node.kind === 149 /* Parameter */ &&
+                (resolver.isRequiredInitializedParameter(node) ||
+                    resolver.isOptionalUninitializedParameterProperty(node));
+            if (type && !shouldUseResolverType) {
+                return ts.visitNode(type, visitDeclarationSubtree);
+            }
+            if (!ts.getParseTreeNode(node)) {
+                return type ? ts.visitNode(type, visitDeclarationSubtree) : ts.createKeywordTypeNode(119 /* AnyKeyword */);
+            }
+            if (node.kind === 157 /* SetAccessor */) {
+                // Set accessors with no associated type node (from it's param or get accessor return) are `any` since they are never contextually typed right now
+                // (The inferred type here will be void, but the old declaration emitter printed `any`, so this replicates that)
+                return ts.createKeywordTypeNode(119 /* AnyKeyword */);
+            }
+            errorNameNode = node.name;
+            var oldDiag;
+            if (!suppressNewDiagnosticContexts) {
+                oldDiag = getSymbolAccessibilityDiagnostic;
+                getSymbolAccessibilityDiagnostic = ts.createGetSymbolAccessibilityDiagnosticForNode(node);
+            }
+            if (node.kind === 232 /* VariableDeclaration */ || node.kind === 182 /* BindingElement */) {
+                return cleanup(resolver.createTypeOfDeclaration(node, enclosingDeclaration, declarationEmitNodeBuilderFlags, symbolTracker));
+            }
+            if (node.kind === 149 /* Parameter */
+                || node.kind === 152 /* PropertyDeclaration */
+                || node.kind === 151 /* PropertySignature */) {
+                if (!node.initializer)
+                    return cleanup(resolver.createTypeOfDeclaration(node, enclosingDeclaration, declarationEmitNodeBuilderFlags, symbolTracker, shouldUseResolverType));
+                return cleanup(resolver.createTypeOfDeclaration(node, enclosingDeclaration, declarationEmitNodeBuilderFlags, symbolTracker, shouldUseResolverType) || resolver.createTypeOfExpression(node.initializer, enclosingDeclaration, declarationEmitNodeBuilderFlags, symbolTracker));
+            }
+            return cleanup(resolver.createReturnTypeOfSignatureDeclaration(node, enclosingDeclaration, declarationEmitNodeBuilderFlags, symbolTracker));
+            function cleanup(returnValue) {
+                errorNameNode = undefined;
+                if (!suppressNewDiagnosticContexts) {
+                    getSymbolAccessibilityDiagnostic = oldDiag;
+                }
+                return returnValue || ts.createKeywordTypeNode(119 /* AnyKeyword */);
+            }
+        }
+        function isDeclarationAndNotVisible(node) {
+            node = ts.getParseTreeNode(node);
+            switch (node.kind) {
+                case 234 /* FunctionDeclaration */:
+                case 239 /* ModuleDeclaration */:
+                case 236 /* InterfaceDeclaration */:
+                case 235 /* ClassDeclaration */:
+                case 237 /* TypeAliasDeclaration */:
+                case 238 /* EnumDeclaration */:
+                    return !resolver.isDeclarationVisible(node);
+                // The following should be doing their own visibility checks based on filtering their members
+                case 232 /* VariableDeclaration */:
+                    return !getBindingNameVisible(node);
+                case 243 /* ImportEqualsDeclaration */:
+                case 244 /* ImportDeclaration */:
+                case 250 /* ExportDeclaration */:
+                case 249 /* ExportAssignment */:
+                    return false;
+            }
+            return false;
+        }
+        function getBindingNameVisible(elem) {
+            if (ts.isOmittedExpression(elem)) {
+                return false;
+            }
+            if (ts.isBindingPattern(elem.name)) {
+                // If any child binding pattern element has been marked visible (usually by collect linked aliases), then this is visible
+                return ts.some(elem.name.elements, getBindingNameVisible);
+            }
+            else {
+                return resolver.isDeclarationVisible(elem);
+            }
+        }
+        function updateParamsList(node, params, modifierMask) {
+            if (ts.hasModifier(node, 8 /* Private */)) {
+                return undefined; // TODO: GH#18217
+            }
+            var newParams = ts.map(params, function (p) { return ensureParameter(p, modifierMask); });
+            if (!newParams) {
+                return undefined; // TODO: GH#18217
+            }
+            return ts.createNodeArray(newParams, params.hasTrailingComma);
+        }
+        function ensureTypeParams(node, params) {
+            return ts.hasModifier(node, 8 /* Private */) ? undefined : ts.visitNodes(params, visitDeclarationSubtree);
+        }
+        function isEnclosingDeclaration(node) {
+            return ts.isSourceFile(node)
+                || ts.isTypeAliasDeclaration(node)
+                || ts.isModuleDeclaration(node)
+                || ts.isClassDeclaration(node)
+                || ts.isInterfaceDeclaration(node)
+                || ts.isFunctionLike(node)
+                || ts.isIndexSignatureDeclaration(node)
+                || ts.isMappedTypeNode(node);
+        }
+        function checkEntityNameVisibility(entityName, enclosingDeclaration) {
+            var visibilityResult = resolver.isEntityNameVisible(entityName, enclosingDeclaration);
+            handleSymbolAccessibilityError(visibilityResult);
+            recordTypeReferenceDirectivesIfNecessary(resolver.getTypeReferenceDirectivesForEntityName(entityName));
+        }
+        function preserveJsDoc(updated, original) {
+            if (ts.hasJSDocNodes(updated) && ts.hasJSDocNodes(original)) {
+                updated.jsDoc = original.jsDoc;
+            }
+            return ts.setCommentRange(updated, ts.getCommentRange(original));
+        }
+        function rewriteModuleSpecifier(parent, input) {
+            if (!input)
+                return undefined; // TODO: GH#18217
+            resultHasExternalModuleIndicator = resultHasExternalModuleIndicator || (parent.kind !== 239 /* ModuleDeclaration */ && parent.kind !== 179 /* ImportType */);
+            if (input.kind === 9 /* StringLiteral */ && isBundledEmit) {
+                var newName = ts.getExternalModuleNameFromDeclaration(context.getEmitHost(), resolver, parent);
+                if (newName) {
+                    return ts.createLiteral(newName);
+                }
+            }
+            return input;
+        }
+        function transformImportEqualsDeclaration(decl) {
+            if (!resolver.isDeclarationVisible(decl))
+                return;
+            if (decl.moduleReference.kind === 254 /* ExternalModuleReference */) {
+                // Rewrite external module names if necessary
+                var specifier = ts.getExternalModuleImportEqualsDeclarationExpression(decl);
+                return ts.updateImportEqualsDeclaration(decl, 
+                /*decorators*/ undefined, decl.modifiers, decl.name, ts.updateExternalModuleReference(decl.moduleReference, rewriteModuleSpecifier(decl, specifier)));
+            }
+            else {
+                var oldDiag = getSymbolAccessibilityDiagnostic;
+                getSymbolAccessibilityDiagnostic = ts.createGetSymbolAccessibilityDiagnosticForNode(decl);
+                checkEntityNameVisibility(decl.moduleReference, enclosingDeclaration);
+                getSymbolAccessibilityDiagnostic = oldDiag;
+                return decl;
+            }
+        }
+        function transformImportDeclaration(decl) {
+            if (!decl.importClause) {
+                // import "mod" - possibly needed for side effects? (global interface patches, module augmentations, etc)
+                return ts.updateImportDeclaration(decl, 
+                /*decorators*/ undefined, decl.modifiers, decl.importClause, rewriteModuleSpecifier(decl, decl.moduleSpecifier));
+            }
+            // The `importClause` visibility corresponds to the default's visibility.
+            var visibleDefaultBinding = decl.importClause && decl.importClause.name && resolver.isDeclarationVisible(decl.importClause) ? decl.importClause.name : undefined;
+            if (!decl.importClause.namedBindings) {
+                // No named bindings (either namespace or list), meaning the import is just default or should be elided
+                return visibleDefaultBinding && ts.updateImportDeclaration(decl, /*decorators*/ undefined, decl.modifiers, ts.updateImportClause(decl.importClause, visibleDefaultBinding, 
+                /*namedBindings*/ undefined), rewriteModuleSpecifier(decl, decl.moduleSpecifier));
+            }
+            if (decl.importClause.namedBindings.kind === 246 /* NamespaceImport */) {
+                // Namespace import (optionally with visible default)
+                var namedBindings = resolver.isDeclarationVisible(decl.importClause.namedBindings) ? decl.importClause.namedBindings : /*namedBindings*/ undefined;
+                return visibleDefaultBinding || namedBindings ? ts.updateImportDeclaration(decl, /*decorators*/ undefined, decl.modifiers, ts.updateImportClause(decl.importClause, visibleDefaultBinding, namedBindings), rewriteModuleSpecifier(decl, decl.moduleSpecifier)) : undefined;
+            }
+            // Named imports (optionally with visible default)
+            var bindingList = ts.mapDefined(decl.importClause.namedBindings.elements, function (b) { return resolver.isDeclarationVisible(b) ? b : undefined; });
+            if ((bindingList && bindingList.length) || visibleDefaultBinding) {
+                return ts.updateImportDeclaration(decl, 
+                /*decorators*/ undefined, decl.modifiers, ts.updateImportClause(decl.importClause, visibleDefaultBinding, bindingList && bindingList.length ? ts.updateNamedImports(decl.importClause.namedBindings, bindingList) : undefined), rewriteModuleSpecifier(decl, decl.moduleSpecifier));
+            }
+            // Nothing visible
+        }
+        function transformAndReplaceLatePaintedStatements(statements) {
+            // This is a `while` loop because `handleSymbolAccessibilityError` can see additional import aliases marked as visible during
+            // error handling which must now be included in the output and themselves checked for errors.
+            // For example:
+            // ```
+            // module A {
+            //   export module Q {}
+            //   import B = Q;
+            //   import C = B;
+            //   export import D = C;
+            // }
+            // ```
+            // In such a scenario, only Q and D are initially visible, but we don't consider imports as private names - instead we say they if they are referenced they must
+            // be recorded. So while checking D's visibility we mark C as visible, then we must check C which in turn marks B, completing the chain of
+            // dependent imports and allowing a valid declaration file output. Today, this dependent alias marking only happens for internal import aliases.
+            while (ts.length(lateMarkedStatements)) {
+                var i = lateMarkedStatements.shift();
+                if (!ts.isLateVisibilityPaintedStatement(i)) {
+                    return ts.Debug.fail("Late replaced statement was found which is not handled by the declaration transformer!: " + (ts.SyntaxKind ? ts.SyntaxKind[i.kind] : i.kind));
+                }
+                var result = transformTopLevelDeclaration(i, /*privateDeclaration*/ true);
+                lateStatementReplacementMap.set("" + ts.getOriginalNodeId(i), result);
+            }
+            // And lastly, we need to get the final form of all those indetermine import declarations from before and add them to the output list
+            // (and remove them from the set to examine for outter declarations)
+            return ts.visitNodes(statements, visitLateVisibilityMarkedStatements);
+            function visitLateVisibilityMarkedStatements(statement) {
+                if (ts.isLateVisibilityPaintedStatement(statement)) {
+                    var key = "" + ts.getOriginalNodeId(statement);
+                    if (lateStatementReplacementMap.has(key)) {
+                        var result = lateStatementReplacementMap.get(key);
+                        lateStatementReplacementMap.delete(key);
+                        if (result && ts.isSourceFile(statement.parent)) {
+                            if (ts.isArray(result) ? ts.some(result, needsScopeMarker) : needsScopeMarker(result)) {
+                                // Top-level declarations in .d.ts files are always considered exported even without a modifier unless there's an export assignment or specifier
+                                needsScopeFixMarker = true;
+                            }
+                            if (ts.isArray(result) ? ts.some(result, isExternalModuleIndicator) : isExternalModuleIndicator(result)) {
+                                resultHasExternalModuleIndicator = true;
+                            }
+                        }
+                        return result;
+                    }
+                }
+                return statement;
+            }
+        }
+        function isExternalModuleIndicator(result) {
+            // Exported top-level member indicates moduleness
+            return ts.isAnyImportOrReExport(result) || ts.isExportAssignment(result) || ts.hasModifier(result, 1 /* Export */);
+        }
+        function needsScopeMarker(result) {
+            return !ts.isAnyImportOrReExport(result) && !ts.isExportAssignment(result) && !ts.hasModifier(result, 1 /* Export */) && !ts.isAmbientModule(result);
+        }
+        function visitDeclarationSubtree(input) {
+            if (shouldStripInternal(input))
+                return;
+            if (ts.isDeclaration(input)) {
+                if (isDeclarationAndNotVisible(input))
+                    return;
+                if (ts.hasDynamicName(input) && !resolver.isLateBound(ts.getParseTreeNode(input))) {
+                    return;
+                }
+            }
+            // Elide implementation signatures from overload sets
+            if (ts.isFunctionLike(input) && resolver.isImplementationOfOverload(input))
+                return;
+            // Elide semicolon class statements
+            if (ts.isSemicolonClassElement(input))
+                return;
+            var previousEnclosingDeclaration;
+            if (isEnclosingDeclaration(input)) {
+                previousEnclosingDeclaration = enclosingDeclaration;
+                enclosingDeclaration = input;
+            }
+            var oldDiag = getSymbolAccessibilityDiagnostic;
+            // Emit methods which are private as properties with no type information
+            if (ts.isMethodDeclaration(input) || ts.isMethodSignature(input)) {
+                if (ts.hasModifier(input, 8 /* Private */)) {
+                    if (input.symbol && input.symbol.declarations && input.symbol.declarations[0] !== input)
+                        return; // Elide all but the first overload
+                    return cleanup(ts.createProperty(/*decorators*/ undefined, ensureModifiers(input), input.name, /*questionToken*/ undefined, /*type*/ undefined, /*initializer*/ undefined));
+                }
+            }
+            var canProdiceDiagnostic = ts.canProduceDiagnostics(input);
+            if (canProdiceDiagnostic && !suppressNewDiagnosticContexts) {
+                getSymbolAccessibilityDiagnostic = ts.createGetSymbolAccessibilityDiagnosticForNode(input);
+            }
+            if (ts.isTypeQueryNode(input)) {
+                checkEntityNameVisibility(input.exprName, enclosingDeclaration);
+            }
+            var oldWithinObjectLiteralType = suppressNewDiagnosticContexts;
+            var shouldEnterSuppressNewDiagnosticsContextContext = ((input.kind === 166 /* TypeLiteral */ || input.kind === 177 /* MappedType */) && input.parent.kind !== 237 /* TypeAliasDeclaration */);
+            if (shouldEnterSuppressNewDiagnosticsContextContext) {
+                // We stop making new diagnostic contexts within object literal types. Unless it's an object type on the RHS of a type alias declaration. Then we do.
+                suppressNewDiagnosticContexts = true;
+            }
+            if (isProcessedComponent(input)) {
+                switch (input.kind) {
+                    case 207 /* ExpressionWithTypeArguments */: {
+                        if ((ts.isEntityName(input.expression) || ts.isEntityNameExpression(input.expression))) {
+                            checkEntityNameVisibility(input.expression, enclosingDeclaration);
+                        }
+                        var node = ts.visitEachChild(input, visitDeclarationSubtree, context);
+                        return cleanup(ts.updateExpressionWithTypeArguments(node, ts.parenthesizeTypeParameters(node.typeArguments), node.expression));
+                    }
+                    case 162 /* TypeReference */: {
+                        checkEntityNameVisibility(input.typeName, enclosingDeclaration);
+                        var node = ts.visitEachChild(input, visitDeclarationSubtree, context);
+                        return cleanup(ts.updateTypeReferenceNode(node, node.typeName, ts.parenthesizeTypeParameters(node.typeArguments)));
+                    }
+                    case 159 /* ConstructSignature */:
+                        return cleanup(ts.updateConstructSignature(input, ensureTypeParams(input, input.typeParameters), updateParamsList(input, input.parameters), ensureType(input, input.type)));
+                    case 155 /* Constructor */: {
+                        var isPrivate = ts.hasModifier(input, 8 /* Private */);
+                        // A constructor declaration may not have a type annotation
+                        var ctor = ts.createSignatureDeclaration(155 /* Constructor */, isPrivate ? undefined : ensureTypeParams(input, input.typeParameters), 
+                        // TODO: GH#18217
+                        isPrivate ? undefined : updateParamsList(input, input.parameters, 0 /* None */), 
+                        /*type*/ undefined);
+                        ctor.modifiers = ts.createNodeArray(ensureModifiers(input));
+                        return cleanup(ctor);
+                    }
+                    case 154 /* MethodDeclaration */: {
+                        var sig = ts.createSignatureDeclaration(153 /* MethodSignature */, ensureTypeParams(input, input.typeParameters), updateParamsList(input, input.parameters), ensureType(input, input.type));
+                        sig.name = input.name;
+                        sig.modifiers = ts.createNodeArray(ensureModifiers(input));
+                        sig.questionToken = input.questionToken;
+                        return cleanup(sig);
+                    }
+                    case 156 /* GetAccessor */: {
+                        var newNode = ensureAccessor(input);
+                        return cleanup(newNode);
+                    }
+                    case 157 /* SetAccessor */: {
+                        var newNode = ensureAccessor(input);
+                        return cleanup(newNode);
+                    }
+                    case 152 /* PropertyDeclaration */:
+                        return cleanup(ts.updateProperty(input, 
+                        /*decorators*/ undefined, ensureModifiers(input), input.name, input.questionToken, !ts.hasModifier(input, 8 /* Private */) ? ensureType(input, input.type) : undefined, ensureNoInitializer(input)));
+                    case 151 /* PropertySignature */:
+                        return cleanup(ts.updatePropertySignature(input, ensureModifiers(input), input.name, input.questionToken, !ts.hasModifier(input, 8 /* Private */) ? ensureType(input, input.type) : undefined, ensureNoInitializer(input)));
+                    case 153 /* MethodSignature */: {
+                        return cleanup(ts.updateMethodSignature(input, ensureTypeParams(input, input.typeParameters), updateParamsList(input, input.parameters), ensureType(input, input.type), input.name, input.questionToken));
+                    }
+                    case 158 /* CallSignature */: {
+                        return cleanup(ts.updateCallSignature(input, ensureTypeParams(input, input.typeParameters), updateParamsList(input, input.parameters), ensureType(input, input.type)));
+                    }
+                    case 160 /* IndexSignature */: {
+                        return cleanup(ts.updateIndexSignature(input, 
+                        /*decorators*/ undefined, ensureModifiers(input), updateParamsList(input, input.parameters), ts.visitNode(input.type, visitDeclarationSubtree) || ts.createKeywordTypeNode(119 /* AnyKeyword */)));
+                    }
+                    case 232 /* VariableDeclaration */: {
+                        if (ts.isBindingPattern(input.name)) {
+                            return recreateBindingPattern(input.name);
+                        }
+                        shouldEnterSuppressNewDiagnosticsContextContext = true;
+                        suppressNewDiagnosticContexts = true; // Variable declaration types also suppress new diagnostic contexts, provided the contexts wouldn't be made for binding pattern types
+                        return cleanup(ts.updateVariableDeclaration(input, input.name, ensureType(input, input.type), ensureNoInitializer(input)));
+                    }
+                    case 148 /* TypeParameter */: {
+                        if (isPrivateMethodTypeParameter(input) && (input.default || input.constraint)) {
+                            return cleanup(ts.updateTypeParameterDeclaration(input, input.name, /*constraint*/ undefined, /*defaultType*/ undefined));
+                        }
+                        return cleanup(ts.visitEachChild(input, visitDeclarationSubtree, context));
+                    }
+                    case 171 /* ConditionalType */: {
+                        // We have to process conditional types in a special way because for visibility purposes we need to push a new enclosingDeclaration
+                        // just for the `infer` types in the true branch. It's an implicit declaration scope that only applies to _part_ of the type.
+                        var checkType = ts.visitNode(input.checkType, visitDeclarationSubtree);
+                        var extendsType = ts.visitNode(input.extendsType, visitDeclarationSubtree);
+                        var oldEnclosingDecl = enclosingDeclaration;
+                        enclosingDeclaration = input.trueType;
+                        var trueType = ts.visitNode(input.trueType, visitDeclarationSubtree);
+                        enclosingDeclaration = oldEnclosingDecl;
+                        var falseType = ts.visitNode(input.falseType, visitDeclarationSubtree);
+                        return cleanup(ts.updateConditionalTypeNode(input, checkType, extendsType, trueType, falseType));
+                    }
+                    case 163 /* FunctionType */: {
+                        return cleanup(ts.updateFunctionTypeNode(input, ts.visitNodes(input.typeParameters, visitDeclarationSubtree), updateParamsList(input, input.parameters), ts.visitNode(input.type, visitDeclarationSubtree)));
+                    }
+                    case 164 /* ConstructorType */: {
+                        return cleanup(ts.updateConstructorTypeNode(input, ts.visitNodes(input.typeParameters, visitDeclarationSubtree), updateParamsList(input, input.parameters), ts.visitNode(input.type, visitDeclarationSubtree)));
+                    }
+                    case 179 /* ImportType */: {
+                        if (!ts.isLiteralImportTypeNode(input))
+                            return cleanup(input);
+                        return cleanup(ts.updateImportTypeNode(input, ts.updateLiteralTypeNode(input.argument, rewriteModuleSpecifier(input, input.argument.literal)), input.qualifier, ts.visitNodes(input.typeArguments, visitDeclarationSubtree, ts.isTypeNode), input.isTypeOf));
+                    }
+                    default: ts.Debug.assertNever(input, "Attempted to process unhandled node kind: " + ts.SyntaxKind[input.kind]);
+                }
+            }
+            return cleanup(ts.visitEachChild(input, visitDeclarationSubtree, context));
+            function cleanup(returnValue) {
+                if (returnValue && canProdiceDiagnostic && ts.hasDynamicName(input)) {
+                    checkName(input);
+                }
+                if (isEnclosingDeclaration(input)) {
+                    enclosingDeclaration = previousEnclosingDeclaration;
+                }
+                if (canProdiceDiagnostic && !suppressNewDiagnosticContexts) {
+                    getSymbolAccessibilityDiagnostic = oldDiag;
+                }
+                if (shouldEnterSuppressNewDiagnosticsContextContext) {
+                    suppressNewDiagnosticContexts = oldWithinObjectLiteralType;
+                }
+                if (returnValue === input) {
+                    return returnValue;
+                }
+                return returnValue && ts.setOriginalNode(preserveJsDoc(returnValue, input), input);
+            }
+        }
+        function isPrivateMethodTypeParameter(node) {
+            return node.parent.kind === 154 /* MethodDeclaration */ && ts.hasModifier(node.parent, 8 /* Private */);
+        }
+        function visitDeclarationStatements(input) {
+            if (!isPreservedDeclarationStatement(input)) {
+                // return undefined for unmatched kinds to omit them from the tree
+                return;
+            }
+            if (shouldStripInternal(input))
+                return;
+            switch (input.kind) {
+                case 250 /* ExportDeclaration */: {
+                    if (ts.isSourceFile(input.parent)) {
+                        resultHasExternalModuleIndicator = true;
+                        resultHasScopeMarker = true;
+                    }
+                    // Always visible if the parent node isn't dropped for being not visible
+                    // Rewrite external module names if necessary
+                    return ts.updateExportDeclaration(input, /*decorators*/ undefined, input.modifiers, input.exportClause, rewriteModuleSpecifier(input, input.moduleSpecifier));
+                }
+                case 249 /* ExportAssignment */: {
+                    // Always visible if the parent node isn't dropped for being not visible
+                    if (ts.isSourceFile(input.parent)) {
+                        resultHasExternalModuleIndicator = true;
+                        resultHasScopeMarker = true;
+                    }
+                    if (input.expression.kind === 71 /* Identifier */) {
+                        return input;
+                    }
+                    else {
+                        var newId = ts.createOptimisticUniqueName("_default");
+                        getSymbolAccessibilityDiagnostic = function () { return ({
+                            diagnosticMessage: ts.Diagnostics.Default_export_of_the_module_has_or_is_using_private_name_0,
+                            errorNode: input
+                        }); };
+                        var varDecl = ts.createVariableDeclaration(newId, resolver.createTypeOfExpression(input.expression, input, declarationEmitNodeBuilderFlags, symbolTracker), /*initializer*/ undefined);
+                        var statement = ts.createVariableStatement(needsDeclare ? [ts.createModifier(124 /* DeclareKeyword */)] : [], ts.createVariableDeclarationList([varDecl], 2 /* Const */));
+                        return [statement, ts.updateExportAssignment(input, input.decorators, input.modifiers, newId)];
+                    }
+                }
+            }
+            var result = transformTopLevelDeclaration(input);
+            // Don't actually transform yet; just leave as original node - will be elided/swapped by late pass
+            lateStatementReplacementMap.set("" + ts.getOriginalNodeId(input), result);
+            return input;
+        }
+        function transformTopLevelDeclaration(input, isPrivate) {
+            if (shouldStripInternal(input))
+                return;
+            switch (input.kind) {
+                case 243 /* ImportEqualsDeclaration */: {
+                    return transformImportEqualsDeclaration(input);
+                }
+                case 244 /* ImportDeclaration */: {
+                    return transformImportDeclaration(input);
+                }
+            }
+            if (ts.isDeclaration(input) && isDeclarationAndNotVisible(input))
+                return;
+            // Elide implementation signatures from overload sets
+            if (ts.isFunctionLike(input) && resolver.isImplementationOfOverload(input))
+                return;
+            var previousEnclosingDeclaration;
+            if (isEnclosingDeclaration(input)) {
+                previousEnclosingDeclaration = enclosingDeclaration;
+                enclosingDeclaration = input;
+            }
+            var canProdiceDiagnostic = ts.canProduceDiagnostics(input);
+            var oldDiag = getSymbolAccessibilityDiagnostic;
+            if (canProdiceDiagnostic) {
+                getSymbolAccessibilityDiagnostic = ts.createGetSymbolAccessibilityDiagnosticForNode(input);
+            }
+            var previousNeedsDeclare = needsDeclare;
+            switch (input.kind) {
+                case 237 /* TypeAliasDeclaration */: // Type aliases get `declare`d if need be (for legacy support), but that's all
+                    return cleanup(ts.updateTypeAliasDeclaration(input, 
+                    /*decorators*/ undefined, ensureModifiers(input, isPrivate), input.name, ts.visitNodes(input.typeParameters, visitDeclarationSubtree, ts.isTypeParameterDeclaration), ts.visitNode(input.type, visitDeclarationSubtree, ts.isTypeNode)));
+                case 236 /* InterfaceDeclaration */: {
+                    return cleanup(ts.updateInterfaceDeclaration(input, 
+                    /*decorators*/ undefined, ensureModifiers(input, isPrivate), input.name, ensureTypeParams(input, input.typeParameters), transformHeritageClauses(input.heritageClauses), ts.visitNodes(input.members, visitDeclarationSubtree)));
+                }
+                case 234 /* FunctionDeclaration */: {
+                    // Generators lose their generator-ness, excepting their return type
+                    return cleanup(ts.updateFunctionDeclaration(input, 
+                    /*decorators*/ undefined, ensureModifiers(input, isPrivate), 
+                    /*asteriskToken*/ undefined, input.name, ensureTypeParams(input, input.typeParameters), updateParamsList(input, input.parameters), ensureType(input, input.type), 
+                    /*body*/ undefined));
+                }
+                case 239 /* ModuleDeclaration */: {
+                    needsDeclare = false;
+                    var inner = input.body;
+                    if (inner && inner.kind === 240 /* ModuleBlock */) {
+                        var statements = ts.visitNodes(inner.statements, visitDeclarationStatements);
+                        var body = ts.updateModuleBlock(inner, transformAndReplaceLatePaintedStatements(statements));
+                        needsDeclare = previousNeedsDeclare;
+                        var mods = ensureModifiers(input, isPrivate);
+                        return cleanup(ts.updateModuleDeclaration(input, 
+                        /*decorators*/ undefined, mods, ts.isExternalModuleAugmentation(input) ? rewriteModuleSpecifier(input, input.name) : input.name, body));
+                    }
+                    else {
+                        needsDeclare = previousNeedsDeclare;
+                        var mods = ensureModifiers(input, isPrivate);
+                        needsDeclare = false;
+                        ts.visitNode(inner, visitDeclarationStatements);
+                        // eagerly transform nested namespaces (the nesting doesn't need any elision or painting done)
+                        var id = "" + ts.getOriginalNodeId(inner); // TODO: GH#18217
+                        var body = lateStatementReplacementMap.get(id);
+                        lateStatementReplacementMap.delete(id);
+                        return cleanup(ts.updateModuleDeclaration(input, 
+                        /*decorators*/ undefined, mods, input.name, body));
+                    }
+                }
+                case 235 /* ClassDeclaration */: {
+                    var modifiers = ts.createNodeArray(ensureModifiers(input, isPrivate));
+                    var typeParameters = ensureTypeParams(input, input.typeParameters);
+                    var ctor = ts.getFirstConstructorWithBody(input);
+                    var parameterProperties = void 0;
+                    if (ctor) {
+                        var oldDiag_1 = getSymbolAccessibilityDiagnostic;
+                        parameterProperties = ts.compact(ts.flatMap(ctor.parameters, function (param) {
+                            if (!ts.hasModifier(param, 92 /* ParameterPropertyModifier */))
+                                return;
+                            getSymbolAccessibilityDiagnostic = ts.createGetSymbolAccessibilityDiagnosticForNode(param);
+                            if (param.name.kind === 71 /* Identifier */) {
+                                return preserveJsDoc(ts.createProperty(
+                                /*decorators*/ undefined, ensureModifiers(param), param.name, param.questionToken, ensureType(param, param.type), ensureNoInitializer(param)), param);
+                            }
+                            else {
+                                // Pattern - this is currently an error, but we emit declarations for it somewhat correctly
+                                return walkBindingPattern(param.name);
+                            }
+                            function walkBindingPattern(pattern) {
+                                var elems;
+                                for (var _i = 0, _a = pattern.elements; _i < _a.length; _i++) {
+                                    var elem = _a[_i];
+                                    if (ts.isOmittedExpression(elem))
+                                        continue;
+                                    if (ts.isBindingPattern(elem.name)) {
+                                        elems = ts.concatenate(elems, walkBindingPattern(elem.name));
+                                    }
+                                    elems = elems || [];
+                                    elems.push(ts.createProperty(
+                                    /*decorators*/ undefined, ensureModifiers(param), elem.name, 
+                                    /*questionToken*/ undefined, ensureType(elem, /*type*/ undefined), 
+                                    /*initializer*/ undefined));
+                                }
+                                return elems;
+                            }
+                        }));
+                        getSymbolAccessibilityDiagnostic = oldDiag_1;
+                    }
+                    var members = ts.createNodeArray(ts.concatenate(parameterProperties, ts.visitNodes(input.members, visitDeclarationSubtree)));
+                    var extendsClause_1 = ts.getClassExtendsHeritageClauseElement(input);
+                    if (extendsClause_1 && !ts.isEntityNameExpression(extendsClause_1.expression) && extendsClause_1.expression.kind !== 95 /* NullKeyword */) {
+                        // We must add a temporary declaration for the extends clause expression
+                        var newId_1 = ts.createOptimisticUniqueName(ts.unescapeLeadingUnderscores(input.name.escapedText) + "_base"); // TODO: GH#18217
+                        getSymbolAccessibilityDiagnostic = function () { return ({
+                            diagnosticMessage: ts.Diagnostics.extends_clause_of_exported_class_0_has_or_is_using_private_name_1,
+                            errorNode: extendsClause_1,
+                            typeName: input.name
+                        }); };
+                        var varDecl = ts.createVariableDeclaration(newId_1, resolver.createTypeOfExpression(extendsClause_1.expression, input, declarationEmitNodeBuilderFlags, symbolTracker), /*initializer*/ undefined);
+                        var statement = ts.createVariableStatement(needsDeclare ? [ts.createModifier(124 /* DeclareKeyword */)] : [], ts.createVariableDeclarationList([varDecl], 2 /* Const */));
+                        var heritageClauses = ts.createNodeArray(ts.map(input.heritageClauses, function (clause) {
+                            if (clause.token === 85 /* ExtendsKeyword */) {
+                                var oldDiag_2 = getSymbolAccessibilityDiagnostic;
+                                getSymbolAccessibilityDiagnostic = ts.createGetSymbolAccessibilityDiagnosticForNode(clause.types[0]);
+                                var newClause = ts.updateHeritageClause(clause, ts.map(clause.types, function (t) { return ts.updateExpressionWithTypeArguments(t, ts.visitNodes(t.typeArguments, visitDeclarationSubtree), newId_1); }));
+                                getSymbolAccessibilityDiagnostic = oldDiag_2;
+                                return newClause;
+                            }
+                            return ts.updateHeritageClause(clause, ts.visitNodes(ts.createNodeArray(ts.filter(clause.types, function (t) { return ts.isEntityNameExpression(t.expression) || t.expression.kind === 95 /* NullKeyword */; })), visitDeclarationSubtree));
+                        }));
+                        return [statement, cleanup(ts.updateClassDeclaration(input, 
+                            /*decorators*/ undefined, modifiers, input.name, typeParameters, heritageClauses, members))]; // TODO: GH#18217
+                    }
+                    else {
+                        var heritageClauses = transformHeritageClauses(input.heritageClauses);
+                        return cleanup(ts.updateClassDeclaration(input, 
+                        /*decorators*/ undefined, modifiers, input.name, typeParameters, heritageClauses, members));
+                    }
+                }
+                case 214 /* VariableStatement */: {
+                    return cleanup(transformVariableStatement(input, isPrivate));
+                }
+                case 238 /* EnumDeclaration */: {
+                    return cleanup(ts.updateEnumDeclaration(input, /*decorators*/ undefined, ts.createNodeArray(ensureModifiers(input, isPrivate)), input.name, ts.createNodeArray(ts.mapDefined(input.members, function (m) {
+                        if (shouldStripInternal(m))
+                            return;
+                        // Rewrite enum values to their constants, if available
+                        var constValue = resolver.getConstantValue(m);
+                        return preserveJsDoc(ts.updateEnumMember(m, m.name, constValue !== undefined ? ts.createLiteral(constValue) : undefined), m);
+                    }))));
+                }
+            }
+            // Anything left unhandled is an error, so this should be unreachable
+            return ts.Debug.assertNever(input, "Unhandled top-level node in declaration emit: " + ts.SyntaxKind[input.kind]);
+            function cleanup(node) {
+                if (isEnclosingDeclaration(input)) {
+                    enclosingDeclaration = previousEnclosingDeclaration;
+                }
+                if (canProdiceDiagnostic) {
+                    getSymbolAccessibilityDiagnostic = oldDiag;
+                }
+                if (input.kind === 239 /* ModuleDeclaration */) {
+                    needsDeclare = previousNeedsDeclare;
+                }
+                if (node === input) {
+                    return node;
+                }
+                return node && ts.setOriginalNode(preserveJsDoc(node, input), input);
+            }
+        }
+        function transformVariableStatement(input, privateDeclaration) {
+            if (!ts.forEach(input.declarationList.declarations, getBindingNameVisible))
+                return;
+            var nodes = ts.visitNodes(input.declarationList.declarations, visitDeclarationSubtree);
+            if (!ts.length(nodes))
+                return;
+            return ts.updateVariableStatement(input, ts.createNodeArray(ensureModifiers(input, privateDeclaration)), ts.updateVariableDeclarationList(input.declarationList, nodes));
+        }
+        function recreateBindingPattern(d) {
+            return ts.flatten(ts.mapDefined(d.elements, function (e) { return recreateBindingElement(e); }));
+        }
+        function recreateBindingElement(e) {
+            if (e.kind === 206 /* OmittedExpression */) {
+                return;
+            }
+            if (e.name) {
+                if (!getBindingNameVisible(e))
+                    return;
+                if (ts.isBindingPattern(e.name)) {
+                    return recreateBindingPattern(e.name);
+                }
+                else {
+                    return ts.createVariableDeclaration(e.name, ensureType(e, /*type*/ undefined), /*initializer*/ undefined);
+                }
+            }
+        }
+        function checkName(node) {
+            var oldDiag;
+            if (!suppressNewDiagnosticContexts) {
+                oldDiag = getSymbolAccessibilityDiagnostic;
+                getSymbolAccessibilityDiagnostic = ts.createGetSymbolAccessibilityDiagnosticForNodeName(node);
+            }
+            errorNameNode = node.name;
+            ts.Debug.assert(resolver.isLateBound(ts.getParseTreeNode(node))); // Should only be called with dynamic names
+            var decl = node;
+            var entityName = decl.name.expression;
+            checkEntityNameVisibility(entityName, enclosingDeclaration);
+            if (!suppressNewDiagnosticContexts) {
+                getSymbolAccessibilityDiagnostic = oldDiag;
+            }
+            errorNameNode = undefined;
+        }
+        function hasInternalAnnotation(range) {
+            var comment = currentSourceFile.text.substring(range.pos, range.end);
+            return ts.stringContains(comment, "@internal");
+        }
+        function shouldStripInternal(node) {
+            if (stripInternal && node) {
+                var leadingCommentRanges = ts.getLeadingCommentRangesOfNode(ts.getParseTreeNode(node), currentSourceFile);
+                if (ts.forEach(leadingCommentRanges, hasInternalAnnotation)) {
+                    return true;
+                }
+            }
+            return false;
+        }
+        function ensureModifiers(node, privateDeclaration) {
+            var currentFlags = ts.getModifierFlags(node);
+            var newFlags = ensureModifierFlags(node, privateDeclaration);
+            if (currentFlags === newFlags) {
+                return node.modifiers;
+            }
+            return ts.createModifiersFromModifierFlags(newFlags);
+        }
+        function ensureModifierFlags(node, privateDeclaration) {
+            var mask = 3071 /* All */ ^ (4 /* Public */ | 256 /* Async */); // No async modifiers in declaration files
+            var additions = (needsDeclare && !isAlwaysType(node)) ? 2 /* Ambient */ : 0 /* None */;
+            var parentIsFile = node.parent.kind === 274 /* SourceFile */;
+            if (!parentIsFile || (isBundledEmit && parentIsFile && ts.isExternalModule(node.parent))) {
+                mask ^= ((privateDeclaration || (isBundledEmit && parentIsFile) ? 0 : 1 /* Export */) | 512 /* Default */ | 2 /* Ambient */);
+                additions = 0 /* None */;
+            }
+            return maskModifierFlags(node, mask, additions);
+        }
+        function ensureAccessor(node) {
+            var accessors = resolver.getAllAccessorDeclarations(node);
+            if (node.kind !== accessors.firstAccessor.kind) {
+                return;
+            }
+            var accessorType = getTypeAnnotationFromAccessor(node);
+            if (!accessorType && accessors.secondAccessor) {
+                accessorType = getTypeAnnotationFromAccessor(accessors.secondAccessor);
+                // If we end up pulling the type from the second accessor, we also need to change the diagnostic context to get the expected error message
+                getSymbolAccessibilityDiagnostic = ts.createGetSymbolAccessibilityDiagnosticForNode(accessors.secondAccessor);
+            }
+            var prop = ts.createProperty(/*decorators*/ undefined, maskModifiers(node, /*mask*/ undefined, (!accessors.setAccessor) ? 64 /* Readonly */ : 0 /* None */), node.name, node.questionToken, ensureType(node, accessorType), /*initializer*/ undefined);
+            var leadingsSyntheticCommentRanges = accessors.secondAccessor && ts.getLeadingCommentRangesOfNode(accessors.secondAccessor, currentSourceFile);
+            if (leadingsSyntheticCommentRanges) {
+                var _loop_10 = function (range) {
+                    if (range.kind === 3 /* MultiLineCommentTrivia */) {
+                        var text = currentSourceFile.text.slice(range.pos + 2, range.end - 2);
+                        var lines = text.split(/\r\n?|\n/g);
+                        if (lines.length > 1) {
+                            var lastLines = lines.slice(1);
+                            var indentation_1 = ts.guessIndentation(lastLines);
+                            text = [lines[0]].concat(ts.map(lastLines, function (l) { return l.slice(indentation_1); })).join(newLine);
+                        }
+                        ts.addSyntheticLeadingComment(prop, range.kind, text, range.hasTrailingNewLine);
+                    }
+                };
+                for (var _i = 0, leadingsSyntheticCommentRanges_1 = leadingsSyntheticCommentRanges; _i < leadingsSyntheticCommentRanges_1.length; _i++) {
+                    var range = leadingsSyntheticCommentRanges_1[_i];
+                    _loop_10(range);
+                }
+            }
+            return prop;
+        }
+        function transformHeritageClauses(nodes) {
+            return ts.createNodeArray(ts.filter(ts.map(nodes, function (clause) { return ts.updateHeritageClause(clause, ts.visitNodes(ts.createNodeArray(ts.filter(clause.types, function (t) {
+                return ts.isEntityNameExpression(t.expression) || (clause.token === 85 /* ExtendsKeyword */ && t.expression.kind === 95 /* NullKeyword */);
+            })), visitDeclarationSubtree)); }), function (clause) { return clause.types && !!clause.types.length; }));
+        }
+    }
+    ts.transformDeclarations = transformDeclarations;
+    function isAlwaysType(node) {
+        if (node.kind === 236 /* InterfaceDeclaration */) {
+            return true;
+        }
+        return false;
+    }
+    // Elide "public" modifier, as it is the default
+    function maskModifiers(node, modifierMask, modifierAdditions) {
+        return ts.createModifiersFromModifierFlags(maskModifierFlags(node, modifierMask, modifierAdditions));
+    }
+    function maskModifierFlags(node, modifierMask, modifierAdditions) {
+        if (modifierMask === void 0) { modifierMask = 3071 /* All */ ^ 4 /* Public */; }
+        if (modifierAdditions === void 0) { modifierAdditions = 0 /* None */; }
+        var flags = (ts.getModifierFlags(node) & modifierMask) | modifierAdditions;
+        if (flags & 512 /* Default */ && flags & 2 /* Ambient */) {
+            flags ^= 2 /* Ambient */; // `declare` is never required alongside `default` (and would be an error if printed)
+        }
+        return flags;
+    }
+    function getTypeAnnotationFromAccessor(accessor) {
+        if (accessor) {
+            return accessor.kind === 156 /* GetAccessor */
+                ? accessor.type // Getter - return type
+                : accessor.parameters.length > 0
+                    ? accessor.parameters[0].type // Setter parameter type
+                    : undefined;
+        }
+    }
+    function canHaveLiteralInitializer(node) {
+        switch (node.kind) {
+            case 232 /* VariableDeclaration */:
+            case 152 /* PropertyDeclaration */:
+            case 151 /* PropertySignature */:
+            case 149 /* Parameter */:
+                return true;
+        }
+        return false;
+    }
+    function isPreservedDeclarationStatement(node) {
+        switch (node.kind) {
+            case 234 /* FunctionDeclaration */:
+            case 239 /* ModuleDeclaration */:
+            case 243 /* ImportEqualsDeclaration */:
+            case 236 /* InterfaceDeclaration */:
+            case 235 /* ClassDeclaration */:
+            case 237 /* TypeAliasDeclaration */:
+            case 238 /* EnumDeclaration */:
+            case 214 /* VariableStatement */:
+            case 244 /* ImportDeclaration */:
+            case 250 /* ExportDeclaration */:
+            case 249 /* ExportAssignment */:
+                return true;
+        }
+        return false;
+    }
+    function isProcessedComponent(node) {
+        switch (node.kind) {
+            case 159 /* ConstructSignature */:
+            case 155 /* Constructor */:
+            case 154 /* MethodDeclaration */:
+            case 156 /* GetAccessor */:
+            case 157 /* SetAccessor */:
+            case 152 /* PropertyDeclaration */:
+            case 151 /* PropertySignature */:
+            case 153 /* MethodSignature */:
+            case 158 /* CallSignature */:
+            case 160 /* IndexSignature */:
+            case 232 /* VariableDeclaration */:
+            case 148 /* TypeParameter */:
+            case 207 /* ExpressionWithTypeArguments */:
+            case 162 /* TypeReference */:
+            case 171 /* ConditionalType */:
+            case 163 /* FunctionType */:
+            case 164 /* ConstructorType */:
+            case 179 /* ImportType */:
+                return true;
+        }
+        return false;
+    }
+})(ts || (ts = {}));
+/* @internal */
+var ts;
+(function (ts) {
+    function getModuleTransformer(moduleKind) {
+        switch (moduleKind) {
+            case ts.ModuleKind.ESNext:
+            case ts.ModuleKind.ES2015:
+                return ts.transformES2015Module;
+            case ts.ModuleKind.System:
+                return ts.transformSystemModule;
+            default:
+                return ts.transformModule;
+        }
+    }
+    var TransformationState;
+    (function (TransformationState) {
+        TransformationState[TransformationState["Uninitialized"] = 0] = "Uninitialized";
+        TransformationState[TransformationState["Initialized"] = 1] = "Initialized";
+        TransformationState[TransformationState["Completed"] = 2] = "Completed";
+        TransformationState[TransformationState["Disposed"] = 3] = "Disposed";
+    })(TransformationState || (TransformationState = {}));
+    var SyntaxKindFeatureFlags;
+    (function (SyntaxKindFeatureFlags) {
+        SyntaxKindFeatureFlags[SyntaxKindFeatureFlags["Substitution"] = 1] = "Substitution";
+        SyntaxKindFeatureFlags[SyntaxKindFeatureFlags["EmitNotifications"] = 2] = "EmitNotifications";
+    })(SyntaxKindFeatureFlags || (SyntaxKindFeatureFlags = {}));
+    function getTransformers(compilerOptions, customTransformers) {
+        var jsx = compilerOptions.jsx;
+        var languageVersion = ts.getEmitScriptTarget(compilerOptions);
+        var moduleKind = ts.getEmitModuleKind(compilerOptions);
+        var transformers = [];
+        ts.addRange(transformers, customTransformers && customTransformers.before);
+        transformers.push(ts.transformTypeScript);
+        if (jsx === 2 /* React */) {
+            transformers.push(ts.transformJsx);
+        }
+        if (languageVersion < 6 /* ESNext */) {
+            transformers.push(ts.transformESNext);
+        }
+        if (languageVersion < 4 /* ES2017 */) {
+            transformers.push(ts.transformES2017);
+        }
+        if (languageVersion < 3 /* ES2016 */) {
+            transformers.push(ts.transformES2016);
+        }
+        if (languageVersion < 2 /* ES2015 */) {
+            transformers.push(ts.transformES2015);
+            transformers.push(ts.transformGenerators);
+        }
+        transformers.push(getModuleTransformer(moduleKind));
+        // The ES5 transformer is last so that it can substitute expressions like `exports.default`
+        // for ES3.
+        if (languageVersion < 1 /* ES5 */) {
+            transformers.push(ts.transformES5);
+        }
+        ts.addRange(transformers, customTransformers && customTransformers.after);
+        return transformers;
+    }
+    ts.getTransformers = getTransformers;
+    /**
+     * Transforms an array of SourceFiles by passing them through each transformer.
+     *
+     * @param resolver The emit resolver provided by the checker.
+     * @param host The emit host object used to interact with the file system.
+     * @param options Compiler options to surface in the `TransformationContext`.
+     * @param nodes An array of nodes to transform.
+     * @param transforms An array of `TransformerFactory` callbacks.
+     * @param allowDtsFiles A value indicating whether to allow the transformation of .d.ts files.
+     */
+    function transformNodes(resolver, host, options, nodes, transformers, allowDtsFiles) {
+        var enabledSyntaxKindFeatures = new Array(305 /* Count */);
+        var lexicalEnvironmentVariableDeclarations;
+        var lexicalEnvironmentFunctionDeclarations;
+        var lexicalEnvironmentVariableDeclarationsStack = [];
+        var lexicalEnvironmentFunctionDeclarationsStack = [];
+        var lexicalEnvironmentStackOffset = 0;
+        var lexicalEnvironmentSuspended = false;
+        var emitHelpers;
+        var onSubstituteNode = function (_, node) { return node; };
+        var onEmitNode = function (hint, node, callback) { return callback(hint, node); };
+        var state = 0 /* Uninitialized */;
+        var diagnostics = [];
+        // The transformation context is provided to each transformer as part of transformer
+        // initialization.
+        var context = {
+            getCompilerOptions: function () { return options; },
+            getEmitResolver: function () { return resolver; },
+            getEmitHost: function () { return host; },
+            startLexicalEnvironment: startLexicalEnvironment,
+            suspendLexicalEnvironment: suspendLexicalEnvironment,
+            resumeLexicalEnvironment: resumeLexicalEnvironment,
+            endLexicalEnvironment: endLexicalEnvironment,
+            hoistVariableDeclaration: hoistVariableDeclaration,
+            hoistFunctionDeclaration: hoistFunctionDeclaration,
+            requestEmitHelper: requestEmitHelper,
+            readEmitHelpers: readEmitHelpers,
+            enableSubstitution: enableSubstitution,
+            enableEmitNotification: enableEmitNotification,
+            isSubstitutionEnabled: isSubstitutionEnabled,
+            isEmitNotificationEnabled: isEmitNotificationEnabled,
+            get onSubstituteNode() { return onSubstituteNode; },
+            set onSubstituteNode(value) {
+                ts.Debug.assert(state < 1 /* Initialized */, "Cannot modify transformation hooks after initialization has completed.");
+                ts.Debug.assert(value !== undefined, "Value must not be 'undefined'");
+                onSubstituteNode = value;
+            },
+            get onEmitNode() { return onEmitNode; },
+            set onEmitNode(value) {
+                ts.Debug.assert(state < 1 /* Initialized */, "Cannot modify transformation hooks after initialization has completed.");
+                ts.Debug.assert(value !== undefined, "Value must not be 'undefined'");
+                onEmitNode = value;
+            },
+            addDiagnostic: function (diag) {
+                diagnostics.push(diag);
+            }
+        };
+        // Ensure the parse tree is clean before applying transformations
+        for (var _i = 0, nodes_4 = nodes; _i < nodes_4.length; _i++) {
+            var node = nodes_4[_i];
+            ts.disposeEmitNodes(ts.getSourceFileOfNode(ts.getParseTreeNode(node)));
+        }
+        ts.performance.mark("beforeTransform");
+        // Chain together and initialize each transformer.
+        var transformation = ts.chain.apply(void 0, transformers)(context);
+        // prevent modification of transformation hooks.
+        state = 1 /* Initialized */;
+        // Transform each node.
+        var transformed = ts.map(nodes, allowDtsFiles ? transformation : transformRoot);
+        // prevent modification of the lexical environment.
+        state = 2 /* Completed */;
+        ts.performance.mark("afterTransform");
+        ts.performance.measure("transformTime", "beforeTransform", "afterTransform");
+        return {
+            transformed: transformed,
+            substituteNode: substituteNode,
+            emitNodeWithNotification: emitNodeWithNotification,
+            dispose: dispose,
+            diagnostics: diagnostics
+        };
+        function transformRoot(node) {
+            return node && (!ts.isSourceFile(node) || !node.isDeclarationFile) ? transformation(node) : node;
+        }
+        /**
+         * Enables expression substitutions in the pretty printer for the provided SyntaxKind.
+         */
+        function enableSubstitution(kind) {
+            ts.Debug.assert(state < 2 /* Completed */, "Cannot modify the transformation context after transformation has completed.");
+            enabledSyntaxKindFeatures[kind] |= 1 /* Substitution */;
+        }
+        /**
+         * Determines whether expression substitutions are enabled for the provided node.
+         */
+        function isSubstitutionEnabled(node) {
+            return (enabledSyntaxKindFeatures[node.kind] & 1 /* Substitution */) !== 0
+                && (ts.getEmitFlags(node) & 4 /* NoSubstitution */) === 0;
+        }
+        /**
+         * Emits a node with possible substitution.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to emit.
+         * @param emitCallback The callback used to emit the node or its substitute.
+         */
+        function substituteNode(hint, node) {
+            ts.Debug.assert(state < 3 /* Disposed */, "Cannot substitute a node after the result is disposed.");
+            return node && isSubstitutionEnabled(node) && onSubstituteNode(hint, node) || node;
+        }
+        /**
+         * Enables before/after emit notifications in the pretty printer for the provided SyntaxKind.
+         */
+        function enableEmitNotification(kind) {
+            ts.Debug.assert(state < 2 /* Completed */, "Cannot modify the transformation context after transformation has completed.");
+            enabledSyntaxKindFeatures[kind] |= 2 /* EmitNotifications */;
+        }
+        /**
+         * Determines whether before/after emit notifications should be raised in the pretty
+         * printer when it emits a node.
+         */
+        function isEmitNotificationEnabled(node) {
+            return (enabledSyntaxKindFeatures[node.kind] & 2 /* EmitNotifications */) !== 0
+                || (ts.getEmitFlags(node) & 2 /* AdviseOnEmitNode */) !== 0;
+        }
+        /**
+         * Emits a node with possible emit notification.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to emit.
+         * @param emitCallback The callback used to emit the node.
+         */
+        function emitNodeWithNotification(hint, node, emitCallback) {
+            ts.Debug.assert(state < 3 /* Disposed */, "Cannot invoke TransformationResult callbacks after the result is disposed.");
+            if (node) {
+                if (isEmitNotificationEnabled(node)) {
+                    onEmitNode(hint, node, emitCallback);
+                }
+                else {
+                    emitCallback(hint, node);
+                }
+            }
+        }
+        /**
+         * Records a hoisted variable declaration for the provided name within a lexical environment.
+         */
+        function hoistVariableDeclaration(name) {
+            ts.Debug.assert(state > 0 /* Uninitialized */, "Cannot modify the lexical environment during initialization.");
+            ts.Debug.assert(state < 2 /* Completed */, "Cannot modify the lexical environment after transformation has completed.");
+            var decl = ts.setEmitFlags(ts.createVariableDeclaration(name), 64 /* NoNestedSourceMaps */);
+            if (!lexicalEnvironmentVariableDeclarations) {
+                lexicalEnvironmentVariableDeclarations = [decl];
+            }
+            else {
+                lexicalEnvironmentVariableDeclarations.push(decl);
+            }
+        }
+        /**
+         * Records a hoisted function declaration within a lexical environment.
+         */
+        function hoistFunctionDeclaration(func) {
+            ts.Debug.assert(state > 0 /* Uninitialized */, "Cannot modify the lexical environment during initialization.");
+            ts.Debug.assert(state < 2 /* Completed */, "Cannot modify the lexical environment after transformation has completed.");
+            if (!lexicalEnvironmentFunctionDeclarations) {
+                lexicalEnvironmentFunctionDeclarations = [func];
+            }
+            else {
+                lexicalEnvironmentFunctionDeclarations.push(func);
+            }
+        }
+        /**
+         * Starts a new lexical environment. Any existing hoisted variable or function declarations
+         * are pushed onto a stack, and the related storage variables are reset.
+         */
+        function startLexicalEnvironment() {
+            ts.Debug.assert(state > 0 /* Uninitialized */, "Cannot modify the lexical environment during initialization.");
+            ts.Debug.assert(state < 2 /* Completed */, "Cannot modify the lexical environment after transformation has completed.");
+            ts.Debug.assert(!lexicalEnvironmentSuspended, "Lexical environment is suspended.");
+            // Save the current lexical environment. Rather than resizing the array we adjust the
+            // stack size variable. This allows us to reuse existing array slots we've
+            // already allocated between transformations to avoid allocation and GC overhead during
+            // transformation.
+            lexicalEnvironmentVariableDeclarationsStack[lexicalEnvironmentStackOffset] = lexicalEnvironmentVariableDeclarations;
+            lexicalEnvironmentFunctionDeclarationsStack[lexicalEnvironmentStackOffset] = lexicalEnvironmentFunctionDeclarations;
+            lexicalEnvironmentStackOffset++;
+            lexicalEnvironmentVariableDeclarations = undefined;
+            lexicalEnvironmentFunctionDeclarations = undefined;
+        }
+        /** Suspends the current lexical environment, usually after visiting a parameter list. */
+        function suspendLexicalEnvironment() {
+            ts.Debug.assert(state > 0 /* Uninitialized */, "Cannot modify the lexical environment during initialization.");
+            ts.Debug.assert(state < 2 /* Completed */, "Cannot modify the lexical environment after transformation has completed.");
+            ts.Debug.assert(!lexicalEnvironmentSuspended, "Lexical environment is already suspended.");
+            lexicalEnvironmentSuspended = true;
+        }
+        /** Resumes a suspended lexical environment, usually before visiting a function body. */
+        function resumeLexicalEnvironment() {
+            ts.Debug.assert(state > 0 /* Uninitialized */, "Cannot modify the lexical environment during initialization.");
+            ts.Debug.assert(state < 2 /* Completed */, "Cannot modify the lexical environment after transformation has completed.");
+            ts.Debug.assert(lexicalEnvironmentSuspended, "Lexical environment is not suspended.");
+            lexicalEnvironmentSuspended = false;
+        }
+        /**
+         * Ends a lexical environment. The previous set of hoisted declarations are restored and
+         * any hoisted declarations added in this environment are returned.
+         */
+        function endLexicalEnvironment() {
+            ts.Debug.assert(state > 0 /* Uninitialized */, "Cannot modify the lexical environment during initialization.");
+            ts.Debug.assert(state < 2 /* Completed */, "Cannot modify the lexical environment after transformation has completed.");
+            ts.Debug.assert(!lexicalEnvironmentSuspended, "Lexical environment is suspended.");
+            var statements;
+            if (lexicalEnvironmentVariableDeclarations || lexicalEnvironmentFunctionDeclarations) {
+                if (lexicalEnvironmentFunctionDeclarations) {
+                    statements = lexicalEnvironmentFunctionDeclarations.slice();
+                }
+                if (lexicalEnvironmentVariableDeclarations) {
+                    var statement = ts.createVariableStatement(
+                    /*modifiers*/ undefined, ts.createVariableDeclarationList(lexicalEnvironmentVariableDeclarations));
+                    if (!statements) {
+                        statements = [statement];
+                    }
+                    else {
+                        statements.push(statement);
+                    }
+                }
+            }
+            // Restore the previous lexical environment.
+            lexicalEnvironmentStackOffset--;
+            lexicalEnvironmentVariableDeclarations = lexicalEnvironmentVariableDeclarationsStack[lexicalEnvironmentStackOffset];
+            lexicalEnvironmentFunctionDeclarations = lexicalEnvironmentFunctionDeclarationsStack[lexicalEnvironmentStackOffset];
+            if (lexicalEnvironmentStackOffset === 0) {
+                lexicalEnvironmentVariableDeclarationsStack = [];
+                lexicalEnvironmentFunctionDeclarationsStack = [];
+            }
+            return statements;
+        }
+        function requestEmitHelper(helper) {
+            ts.Debug.assert(state > 0 /* Uninitialized */, "Cannot modify the transformation context during initialization.");
+            ts.Debug.assert(state < 2 /* Completed */, "Cannot modify the transformation context after transformation has completed.");
+            ts.Debug.assert(!helper.scoped, "Cannot request a scoped emit helper.");
+            emitHelpers = ts.append(emitHelpers, helper);
+        }
+        function readEmitHelpers() {
+            ts.Debug.assert(state > 0 /* Uninitialized */, "Cannot modify the transformation context during initialization.");
+            ts.Debug.assert(state < 2 /* Completed */, "Cannot modify the transformation context after transformation has completed.");
+            var helpers = emitHelpers;
+            emitHelpers = undefined;
+            return helpers;
+        }
+        function dispose() {
+            if (state < 3 /* Disposed */) {
+                // Clean up emit nodes on parse tree
+                for (var _i = 0, nodes_5 = nodes; _i < nodes_5.length; _i++) {
+                    var node = nodes_5[_i];
+                    ts.disposeEmitNodes(ts.getSourceFileOfNode(ts.getParseTreeNode(node)));
+                }
+                // Release references to external entries for GC purposes.
+                lexicalEnvironmentVariableDeclarations = undefined;
+                lexicalEnvironmentVariableDeclarationsStack = undefined;
+                lexicalEnvironmentFunctionDeclarations = undefined;
+                lexicalEnvironmentFunctionDeclarationsStack = undefined;
+                onSubstituteNode = undefined;
+                onEmitNode = undefined;
+                emitHelpers = undefined;
+                // Prevent further use of the transformation result.
+                state = 3 /* Disposed */;
+            }
+        }
+    }
+    ts.transformNodes = transformNodes;
+})(ts || (ts = {}));
+/* @internal */
+var ts;
+(function (ts) {
+    // Used for initialize lastEncodedSourceMapSpan and reset lastEncodedSourceMapSpan when updateLastEncodedAndRecordedSpans
+    var defaultLastEncodedSourceMapSpan = {
+        emittedLine: 1,
+        emittedColumn: 1,
+        sourceLine: 1,
+        sourceColumn: 1,
+        sourceIndex: 0
+    };
+    function createSourceMapWriter(host, writer, compilerOptions) {
+        if (compilerOptions === void 0) { compilerOptions = host.getCompilerOptions(); }
+        var extendedDiagnostics = compilerOptions.extendedDiagnostics;
+        var currentSource;
+        var currentSourceText;
+        var sourceMapDir; // The directory in which sourcemap will be
+        // Current source map file and its index in the sources list
+        var sourceMapSourceIndex;
+        // Last recorded and encoded spans
+        var lastRecordedSourceMapSpan;
+        var lastEncodedSourceMapSpan;
+        var lastEncodedNameIndex;
+        // Source map data
+        var sourceMapData;
+        var sourceMapDataList;
+        var disabled = !(compilerOptions.sourceMap || compilerOptions.inlineSourceMap);
+        var completedSections;
+        var sectionStartLine;
+        var sectionStartColumn;
+        return {
+            initialize: initialize,
+            reset: reset,
+            setSourceFile: setSourceFile,
+            emitPos: emitPos,
+            emitNodeWithSourceMap: emitNodeWithSourceMap,
+            emitTokenWithSourceMap: emitTokenWithSourceMap,
+            getText: getText,
+            getSourceMappingURL: getSourceMappingURL,
+        };
+        /**
+         * Skips trivia such as comments and white-space that can optionally overriden by the source map source
+         */
+        function skipSourceTrivia(pos) {
+            return currentSource.skipTrivia ? currentSource.skipTrivia(pos) : ts.skipTrivia(currentSourceText, pos);
+        }
+        /**
+         * Initialize the SourceMapWriter for a new output file.
+         *
+         * @param filePath The path to the generated output file.
+         * @param sourceMapFilePath The path to the output source map file.
+         * @param sourceFileOrBundle The input source file or bundle for the program.
+         */
+        function initialize(filePath, sourceMapFilePath, sourceFileOrBundle, outputSourceMapDataList) {
+            if (disabled || ts.fileExtensionIs(filePath, ".json" /* Json */)) {
+                return;
+            }
+            if (sourceMapData) {
+                reset();
+            }
+            sourceMapDataList = outputSourceMapDataList;
+            currentSource = undefined;
+            currentSourceText = undefined;
+            // Current source map file and its index in the sources list
+            sourceMapSourceIndex = -1;
+            // Last recorded and encoded spans
+            lastRecordedSourceMapSpan = undefined;
+            lastEncodedSourceMapSpan = defaultLastEncodedSourceMapSpan;
+            lastEncodedNameIndex = 0;
+            // Initialize source map data
+            completedSections = [];
+            sectionStartLine = 1;
+            sectionStartColumn = 1;
+            sourceMapData = {
+                sourceMapFilePath: sourceMapFilePath,
+                jsSourceMappingURL: !compilerOptions.inlineSourceMap ? ts.getBaseFileName(ts.normalizeSlashes(sourceMapFilePath)) : undefined,
+                sourceMapFile: ts.getBaseFileName(ts.normalizeSlashes(filePath)),
+                sourceMapSourceRoot: compilerOptions.sourceRoot || "",
+                sourceMapSources: [],
+                inputSourceFileNames: [],
+                sourceMapNames: [],
+                sourceMapMappings: "",
+                sourceMapSourcesContent: compilerOptions.inlineSources ? [] : undefined,
+                sourceMapDecodedMappings: []
+            };
+            // Normalize source root and make sure it has trailing "/" so that it can be used to combine paths with the
+            // relative paths of the sources list in the sourcemap
+            sourceMapData.sourceMapSourceRoot = ts.normalizeSlashes(sourceMapData.sourceMapSourceRoot);
+            if (sourceMapData.sourceMapSourceRoot.length && sourceMapData.sourceMapSourceRoot.charCodeAt(sourceMapData.sourceMapSourceRoot.length - 1) !== 47 /* slash */) {
+                sourceMapData.sourceMapSourceRoot += ts.directorySeparator;
+            }
+            if (compilerOptions.mapRoot) {
+                sourceMapDir = ts.normalizeSlashes(compilerOptions.mapRoot);
+                if (sourceFileOrBundle.kind === 274 /* SourceFile */) { // emitting single module file
+                    // For modules or multiple emit files the mapRoot will have directory structure like the sources
+                    // So if src\a.ts and src\lib\b.ts are compiled together user would be moving the maps into mapRoot\a.js.map and mapRoot\lib\b.js.map
+                    sourceMapDir = ts.getDirectoryPath(ts.getSourceFilePathInNewDir(sourceFileOrBundle, host, sourceMapDir));
+                }
+                if (!ts.isRootedDiskPath(sourceMapDir) && !ts.isUrl(sourceMapDir)) {
+                    // The relative paths are relative to the common directory
+                    sourceMapDir = ts.combinePaths(host.getCommonSourceDirectory(), sourceMapDir);
+                    sourceMapData.jsSourceMappingURL = ts.getRelativePathToDirectoryOrUrl(ts.getDirectoryPath(ts.normalizePath(filePath)), // get the relative sourceMapDir path based on jsFilePath
+                    ts.combinePaths(sourceMapDir, sourceMapData.jsSourceMappingURL), // this is where user expects to see sourceMap
+                    host.getCurrentDirectory(), host.getCanonicalFileName, 
+                    /*isAbsolutePathAnUrl*/ true);
+                }
+                else {
+                    sourceMapData.jsSourceMappingURL = ts.combinePaths(sourceMapDir, sourceMapData.jsSourceMappingURL);
+                }
+            }
+            else {
+                sourceMapDir = ts.getDirectoryPath(ts.normalizePath(filePath));
+            }
+        }
+        /**
+         * Reset the SourceMapWriter to an empty state.
+         */
+        function reset() {
+            if (disabled) {
+                return;
+            }
+            // Record source map data for the test harness.
+            if (sourceMapDataList) {
+                sourceMapDataList.push(sourceMapData);
+            }
+            currentSource = undefined;
+            sourceMapDir = undefined;
+            sourceMapSourceIndex = undefined;
+            lastRecordedSourceMapSpan = undefined;
+            lastEncodedSourceMapSpan = undefined;
+            lastEncodedNameIndex = undefined;
+            sourceMapData = undefined;
+            sourceMapDataList = undefined;
+            completedSections = undefined;
+            sectionStartLine = undefined;
+            sectionStartColumn = undefined;
+        }
+        function captureSection() {
+            return {
+                version: 3,
+                file: sourceMapData.sourceMapFile,
+                sourceRoot: sourceMapData.sourceMapSourceRoot,
+                sources: sourceMapData.sourceMapSources,
+                names: sourceMapData.sourceMapNames,
+                mappings: sourceMapData.sourceMapMappings,
+                sourcesContent: sourceMapData.sourceMapSourcesContent,
+            };
+        }
+        function resetSectionalData() {
+            sourceMapData.sourceMapSources = [];
+            sourceMapData.sourceMapNames = [];
+            sourceMapData.sourceMapMappings = "";
+            sourceMapData.sourceMapSourcesContent = compilerOptions.inlineSources ? [] : undefined;
+        }
+        function generateMap() {
+            if (completedSections.length) {
+                captureSectionalSpanIfNeeded(/*reset*/ false);
+                return {
+                    version: 3,
+                    file: sourceMapData.sourceMapFile,
+                    sections: completedSections
+                };
+            }
+            else {
+                return captureSection();
+            }
+        }
+        // Encoding for sourcemap span
+        function encodeLastRecordedSourceMapSpan() {
+            if (!lastRecordedSourceMapSpan || lastRecordedSourceMapSpan === lastEncodedSourceMapSpan) {
+                return;
+            }
+            var prevEncodedEmittedColumn = lastEncodedSourceMapSpan.emittedColumn;
+            // Line/Comma delimiters
+            if (lastEncodedSourceMapSpan.emittedLine === lastRecordedSourceMapSpan.emittedLine) {
+                // Emit comma to separate the entry
+                if (sourceMapData.sourceMapMappings) {
+                    sourceMapData.sourceMapMappings += ",";
+                }
+            }
+            else {
+                // Emit line delimiters
+                for (var encodedLine = lastEncodedSourceMapSpan.emittedLine; encodedLine < lastRecordedSourceMapSpan.emittedLine; encodedLine++) {
+                    sourceMapData.sourceMapMappings += ";";
+                }
+                prevEncodedEmittedColumn = 1;
+            }
+            // 1. Relative Column 0 based
+            sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.emittedColumn - prevEncodedEmittedColumn);
+            // 2. Relative sourceIndex
+            sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.sourceIndex - lastEncodedSourceMapSpan.sourceIndex);
+            // 3. Relative sourceLine 0 based
+            sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.sourceLine - lastEncodedSourceMapSpan.sourceLine);
+            // 4. Relative sourceColumn 0 based
+            sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.sourceColumn - lastEncodedSourceMapSpan.sourceColumn);
+            // 5. Relative namePosition 0 based
+            if (lastRecordedSourceMapSpan.nameIndex >= 0) {
+                ts.Debug.assert(false, "We do not support name index right now, Make sure to update updateLastEncodedAndRecordedSpans when we start using this");
+                sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.nameIndex - lastEncodedNameIndex);
+                lastEncodedNameIndex = lastRecordedSourceMapSpan.nameIndex;
+            }
+            lastEncodedSourceMapSpan = lastRecordedSourceMapSpan;
+            sourceMapData.sourceMapDecodedMappings.push(lastEncodedSourceMapSpan);
+        }
+        /**
+         * Emits a mapping.
+         *
+         * If the position is synthetic (undefined or a negative value), no mapping will be
+         * created.
+         *
+         * @param pos The position.
+         */
+        function emitPos(pos) {
+            if (disabled || ts.positionIsSynthesized(pos) || isJsonSourceMapSource(currentSource)) {
+                return;
+            }
+            if (extendedDiagnostics) {
+                ts.performance.mark("beforeSourcemap");
+            }
+            var sourceLinePos = ts.getLineAndCharacterOfPosition(currentSource, pos);
+            // Convert the location to be one-based.
+            sourceLinePos.line++;
+            sourceLinePos.character++;
+            var emittedLine = writer.getLine() - sectionStartLine + 1;
+            var emittedColumn = emittedLine === 0 ? (writer.getColumn() - sectionStartColumn + 1) : writer.getColumn();
+            // If this location wasn't recorded or the location in source is going backwards, record the span
+            if (!lastRecordedSourceMapSpan ||
+                lastRecordedSourceMapSpan.emittedLine !== emittedLine ||
+                lastRecordedSourceMapSpan.emittedColumn !== emittedColumn ||
+                (lastRecordedSourceMapSpan.sourceIndex === sourceMapSourceIndex &&
+                    (lastRecordedSourceMapSpan.sourceLine > sourceLinePos.line ||
+                        (lastRecordedSourceMapSpan.sourceLine === sourceLinePos.line && lastRecordedSourceMapSpan.sourceColumn > sourceLinePos.character)))) {
+                // Encode the last recordedSpan before assigning new
+                encodeLastRecordedSourceMapSpan();
+                // New span
+                lastRecordedSourceMapSpan = {
+                    emittedLine: emittedLine,
+                    emittedColumn: emittedColumn,
+                    sourceLine: sourceLinePos.line,
+                    sourceColumn: sourceLinePos.character,
+                    sourceIndex: sourceMapSourceIndex
+                };
+            }
+            else {
+                // Take the new pos instead since there is no change in emittedLine and column since last location
+                lastRecordedSourceMapSpan.sourceLine = sourceLinePos.line;
+                lastRecordedSourceMapSpan.sourceColumn = sourceLinePos.character;
+                lastRecordedSourceMapSpan.sourceIndex = sourceMapSourceIndex;
+            }
+            if (extendedDiagnostics) {
+                ts.performance.mark("afterSourcemap");
+                ts.performance.measure("Source Map", "beforeSourcemap", "afterSourcemap");
+            }
+        }
+        function captureSectionalSpanIfNeeded(reset) {
+            if (lastRecordedSourceMapSpan && lastRecordedSourceMapSpan === lastEncodedSourceMapSpan) { // If we've recorded some spans, save them
+                completedSections.push({ offset: { line: sectionStartLine - 1, column: sectionStartColumn - 1 }, map: captureSection() });
+                if (reset) {
+                    resetSectionalData();
+                }
+            }
+        }
+        /**
+         * Emits a node with possible leading and trailing source maps.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to emit.
+         * @param emitCallback The callback used to emit the node.
+         */
+        function emitNodeWithSourceMap(hint, node, emitCallback) {
+            if (disabled || ts.isInJsonFile(node)) {
+                return emitCallback(hint, node);
+            }
+            if (node) {
+                if (ts.isUnparsedSource(node) && node.sourceMapText !== undefined) {
+                    captureSectionalSpanIfNeeded(/*reset*/ true);
+                    var text = node.sourceMapText;
+                    var parsed = void 0;
+                    try {
+                        parsed = JSON.parse(text);
+                    }
+                    catch (_a) {
+                        // empty
+                    }
+                    var offset = { line: writer.getLine() - 1, column: writer.getColumn() - 1 };
+                    completedSections.push(parsed
+                        ? {
+                            offset: offset,
+                            map: parsed
+                        }
+                        : {
+                            offset: offset,
+                            // This is just passes the buck on sourcemaps we don't really understand, instead of issuing an error (which would be difficult this late)
+                            url: "data:application/json;charset=utf-8;base64," + ts.base64encode(ts.sys, text)
+                        });
+                    var emitResult = emitCallback(hint, node);
+                    sectionStartLine = writer.getLine();
+                    sectionStartColumn = writer.getColumn();
+                    lastRecordedSourceMapSpan = undefined;
+                    lastEncodedSourceMapSpan = defaultLastEncodedSourceMapSpan;
+                    return emitResult;
+                }
+                var emitNode = node.emitNode;
+                var emitFlags = emitNode && emitNode.flags || 0 /* None */;
+                var range = emitNode && emitNode.sourceMapRange;
+                var _b = range || node, pos = _b.pos, end = _b.end;
+                var source = range && range.source;
+                var oldSource = currentSource;
+                if (source === oldSource)
+                    source = undefined;
+                if (source)
+                    setSourceFile(source);
+                if (node.kind !== 300 /* NotEmittedStatement */
+                    && (emitFlags & 16 /* NoLeadingSourceMap */) === 0
+                    && pos >= 0) {
+                    emitPos(skipSourceTrivia(pos));
+                }
+                if (source)
+                    setSourceFile(oldSource);
+                if (emitFlags & 64 /* NoNestedSourceMaps */) {
+                    disabled = true;
+                    emitCallback(hint, node);
+                    disabled = false;
+                }
+                else {
+                    emitCallback(hint, node);
+                }
+                if (source)
+                    setSourceFile(source);
+                if (node.kind !== 300 /* NotEmittedStatement */
+                    && (emitFlags & 32 /* NoTrailingSourceMap */) === 0
+                    && end >= 0) {
+                    emitPos(end);
+                }
+                if (source)
+                    setSourceFile(oldSource);
+            }
+        }
+        /**
+         * Emits a token of a node with possible leading and trailing source maps.
+         *
+         * @param node The node containing the token.
+         * @param token The token to emit.
+         * @param tokenStartPos The start pos of the token.
+         * @param emitCallback The callback used to emit the token.
+         */
+        function emitTokenWithSourceMap(node, token, writer, tokenPos, emitCallback) {
+            if (disabled || ts.isInJsonFile(node)) {
+                return emitCallback(token, writer, tokenPos);
+            }
+            var emitNode = node && node.emitNode;
+            var emitFlags = emitNode && emitNode.flags || 0 /* None */;
+            var range = emitNode && emitNode.tokenSourceMapRanges && emitNode.tokenSourceMapRanges[token];
+            tokenPos = skipSourceTrivia(range ? range.pos : tokenPos);
+            if ((emitFlags & 128 /* NoTokenLeadingSourceMaps */) === 0 && tokenPos >= 0) {
+                emitPos(tokenPos);
+            }
+            tokenPos = emitCallback(token, writer, tokenPos);
+            if (range)
+                tokenPos = range.end;
+            if ((emitFlags & 256 /* NoTokenTrailingSourceMaps */) === 0 && tokenPos >= 0) {
+                emitPos(tokenPos);
+            }
+            return tokenPos;
+        }
+        function isJsonSourceMapSource(sourceFile) {
+            return ts.fileExtensionIs(sourceFile.fileName, ".json" /* Json */);
+        }
+        /**
+         * Set the current source file.
+         *
+         * @param sourceFile The source file.
+         */
+        function setSourceFile(sourceFile) {
+            if (disabled) {
+                return;
+            }
+            currentSource = sourceFile;
+            currentSourceText = currentSource.text;
+            if (isJsonSourceMapSource(sourceFile)) {
+                return;
+            }
+            // Add the file to tsFilePaths
+            // If sourceroot option: Use the relative path corresponding to the common directory path
+            // otherwise source locations relative to map file location
+            var sourcesDirectoryPath = compilerOptions.sourceRoot ? host.getCommonSourceDirectory() : sourceMapDir;
+            var source = ts.getRelativePathToDirectoryOrUrl(sourcesDirectoryPath, currentSource.fileName, host.getCurrentDirectory(), host.getCanonicalFileName, 
+            /*isAbsolutePathAnUrl*/ true);
+            sourceMapSourceIndex = sourceMapData.sourceMapSources.indexOf(source);
+            if (sourceMapSourceIndex === -1) {
+                sourceMapSourceIndex = sourceMapData.sourceMapSources.length;
+                sourceMapData.sourceMapSources.push(source);
+                // The one that can be used from program to get the actual source file
+                sourceMapData.inputSourceFileNames.push(currentSource.fileName);
+                if (compilerOptions.inlineSources) {
+                    sourceMapData.sourceMapSourcesContent.push(currentSource.text);
+                }
+            }
+        }
+        /**
+         * Gets the text for the source map.
+         */
+        function getText() {
+            if (disabled || isJsonSourceMapSource(currentSource)) {
+                return undefined; // TODO: GH#18217
+            }
+            encodeLastRecordedSourceMapSpan();
+            return JSON.stringify(generateMap());
+        }
+        /**
+         * Gets the SourceMappingURL for the source map.
+         */
+        function getSourceMappingURL() {
+            if (disabled || isJsonSourceMapSource(currentSource)) {
+                return undefined; // TODO: GH#18217
+            }
+            if (compilerOptions.inlineSourceMap) {
+                // Encode the sourceMap into the sourceMap url
+                var base64SourceMapText = ts.base64encode(ts.sys, getText());
+                return sourceMapData.jsSourceMappingURL = "data:application/json;base64," + base64SourceMapText;
+            }
+            else {
+                return sourceMapData.jsSourceMappingURL;
+            }
+        }
+    }
+    ts.createSourceMapWriter = createSourceMapWriter;
+    var base64Chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+    function base64FormatEncode(inValue) {
+        if (inValue < 64) {
+            return base64Chars.charAt(inValue);
+        }
+        throw TypeError(inValue + ": not a 64 based value");
+    }
+    function base64VLQFormatEncode(inValue) {
+        // Add a new least significant bit that has the sign of the value.
+        // if negative number the least significant bit that gets added to the number has value 1
+        // else least significant bit value that gets added is 0
+        // eg. -1 changes to binary : 01 [1] => 3
+        //     +1 changes to binary : 01 [0] => 2
+        if (inValue < 0) {
+            inValue = ((-inValue) << 1) + 1;
+        }
+        else {
+            inValue = inValue << 1;
+        }
+        // Encode 5 bits at a time starting from least significant bits
+        var encodedStr = "";
+        do {
+            var currentDigit = inValue & 31; // 11111
+            inValue = inValue >> 5;
+            if (inValue > 0) {
+                // There are still more digits to decode, set the msb (6th bit)
+                currentDigit = currentDigit | 32;
+            }
+            encodedStr = encodedStr + base64FormatEncode(currentDigit);
+        } while (inValue > 0);
+        return encodedStr;
+    }
+})(ts || (ts = {}));
+/* @internal */
+var ts;
+(function (ts) {
+    function createCommentWriter(printerOptions, emitPos) {
+        var extendedDiagnostics = printerOptions.extendedDiagnostics;
+        var newLine = ts.getNewLineCharacter(printerOptions);
+        var writer;
+        var containerPos = -1;
+        var containerEnd = -1;
+        var declarationListContainerEnd = -1;
+        var currentSourceFile;
+        var currentText;
+        var currentLineMap;
+        var detachedCommentsInfo;
+        var hasWrittenComment = false;
+        var disabled = !!printerOptions.removeComments;
+        return {
+            reset: reset,
+            setWriter: setWriter,
+            setSourceFile: setSourceFile,
+            emitNodeWithComments: emitNodeWithComments,
+            emitBodyWithDetachedComments: emitBodyWithDetachedComments,
+            emitTrailingCommentsOfPosition: emitTrailingCommentsOfPosition,
+            emitLeadingCommentsOfPosition: emitLeadingCommentsOfPosition,
+        };
+        function emitNodeWithComments(hint, node, emitCallback) {
+            if (disabled) {
+                emitCallback(hint, node);
+                return;
+            }
+            if (node) {
+                hasWrittenComment = false;
+                var emitNode = node.emitNode;
+                var emitFlags = emitNode && emitNode.flags || 0;
+                var _a = emitNode && emitNode.commentRange || node, pos = _a.pos, end = _a.end;
+                if ((pos < 0 && end < 0) || (pos === end)) {
+                    // Both pos and end are synthesized, so just emit the node without comments.
+                    emitNodeWithSynthesizedComments(hint, node, emitNode, emitFlags, emitCallback);
+                }
+                else {
+                    if (extendedDiagnostics) {
+                        ts.performance.mark("preEmitNodeWithComment");
+                    }
+                    var isEmittedNode = node.kind !== 300 /* NotEmittedStatement */;
+                    // We have to explicitly check that the node is JsxText because if the compilerOptions.jsx is "preserve" we will not do any transformation.
+                    // It is expensive to walk entire tree just to set one kind of node to have no comments.
+                    var skipLeadingComments = pos < 0 || (emitFlags & 512 /* NoLeadingComments */) !== 0 || node.kind === 10 /* JsxText */;
+                    var skipTrailingComments = end < 0 || (emitFlags & 1024 /* NoTrailingComments */) !== 0 || node.kind === 10 /* JsxText */;
+                    // Emit leading comments if the position is not synthesized and the node
+                    // has not opted out from emitting leading comments.
+                    if (!skipLeadingComments) {
+                        emitLeadingComments(pos, isEmittedNode);
+                    }
+                    // Save current container state on the stack.
+                    var savedContainerPos = containerPos;
+                    var savedContainerEnd = containerEnd;
+                    var savedDeclarationListContainerEnd = declarationListContainerEnd;
+                    if (!skipLeadingComments) {
+                        containerPos = pos;
+                    }
+                    if (!skipTrailingComments) {
+                        containerEnd = end;
+                        // To avoid invalid comment emit in a down-level binding pattern, we
+                        // keep track of the last declaration list container's end
+                        if (node.kind === 233 /* VariableDeclarationList */) {
+                            declarationListContainerEnd = end;
+                        }
+                    }
+                    if (extendedDiagnostics) {
+                        ts.performance.measure("commentTime", "preEmitNodeWithComment");
+                    }
+                    emitNodeWithSynthesizedComments(hint, node, emitNode, emitFlags, emitCallback);
+                    if (extendedDiagnostics) {
+                        ts.performance.mark("postEmitNodeWithComment");
+                    }
+                    // Restore previous container state.
+                    containerPos = savedContainerPos;
+                    containerEnd = savedContainerEnd;
+                    declarationListContainerEnd = savedDeclarationListContainerEnd;
+                    // Emit trailing comments if the position is not synthesized and the node
+                    // has not opted out from emitting leading comments and is an emitted node.
+                    if (!skipTrailingComments && isEmittedNode) {
+                        emitTrailingComments(end);
+                    }
+                    if (extendedDiagnostics) {
+                        ts.performance.measure("commentTime", "postEmitNodeWithComment");
+                    }
+                }
+            }
+        }
+        function emitNodeWithSynthesizedComments(hint, node, emitNode, emitFlags, emitCallback) {
+            var leadingComments = emitNode && emitNode.leadingComments;
+            if (ts.some(leadingComments)) {
+                if (extendedDiagnostics) {
+                    ts.performance.mark("preEmitNodeWithSynthesizedComments");
+                }
+                ts.forEach(leadingComments, emitLeadingSynthesizedComment);
+                if (extendedDiagnostics) {
+                    ts.performance.measure("commentTime", "preEmitNodeWithSynthesizedComments");
+                }
+            }
+            emitNodeWithNestedComments(hint, node, emitFlags, emitCallback);
+            var trailingComments = emitNode && emitNode.trailingComments;
+            if (ts.some(trailingComments)) {
+                if (extendedDiagnostics) {
+                    ts.performance.mark("postEmitNodeWithSynthesizedComments");
+                }
+                ts.forEach(trailingComments, emitTrailingSynthesizedComment);
+                if (extendedDiagnostics) {
+                    ts.performance.measure("commentTime", "postEmitNodeWithSynthesizedComments");
+                }
+            }
+        }
+        function emitLeadingSynthesizedComment(comment) {
+            if (comment.kind === 2 /* SingleLineCommentTrivia */) {
+                writer.writeLine();
+            }
+            writeSynthesizedComment(comment);
+            if (comment.hasTrailingNewLine || comment.kind === 2 /* SingleLineCommentTrivia */) {
+                writer.writeLine();
+            }
+            else {
+                writer.write(" ");
+            }
+        }
+        function emitTrailingSynthesizedComment(comment) {
+            if (!writer.isAtStartOfLine()) {
+                writer.write(" ");
+            }
+            writeSynthesizedComment(comment);
+            if (comment.hasTrailingNewLine) {
+                writer.writeLine();
+            }
+        }
+        function writeSynthesizedComment(comment) {
+            var text = formatSynthesizedComment(comment);
+            var lineMap = comment.kind === 3 /* MultiLineCommentTrivia */ ? ts.computeLineStarts(text) : undefined;
+            ts.writeCommentRange(text, lineMap, writer, 0, text.length, newLine);
+        }
+        function formatSynthesizedComment(comment) {
+            return comment.kind === 3 /* MultiLineCommentTrivia */
+                ? "/*" + comment.text + "*/"
+                : "//" + comment.text;
+        }
+        function emitNodeWithNestedComments(hint, node, emitFlags, emitCallback) {
+            if (emitFlags & 2048 /* NoNestedComments */) {
+                disabled = true;
+                emitCallback(hint, node);
+                disabled = false;
+            }
+            else {
+                emitCallback(hint, node);
+            }
+        }
+        function emitBodyWithDetachedComments(node, detachedRange, emitCallback) {
+            if (extendedDiagnostics) {
+                ts.performance.mark("preEmitBodyWithDetachedComments");
+            }
+            var pos = detachedRange.pos, end = detachedRange.end;
+            var emitFlags = ts.getEmitFlags(node);
+            var skipLeadingComments = pos < 0 || (emitFlags & 512 /* NoLeadingComments */) !== 0;
+            var skipTrailingComments = disabled || end < 0 || (emitFlags & 1024 /* NoTrailingComments */) !== 0;
+            if (!skipLeadingComments) {
+                emitDetachedCommentsAndUpdateCommentsInfo(detachedRange);
+            }
+            if (extendedDiagnostics) {
+                ts.performance.measure("commentTime", "preEmitBodyWithDetachedComments");
+            }
+            if (emitFlags & 2048 /* NoNestedComments */ && !disabled) {
+                disabled = true;
+                emitCallback(node);
+                disabled = false;
+            }
+            else {
+                emitCallback(node);
+            }
+            if (extendedDiagnostics) {
+                ts.performance.mark("beginEmitBodyWithDetachedCommetns");
+            }
+            if (!skipTrailingComments) {
+                emitLeadingComments(detachedRange.end, /*isEmittedNode*/ true);
+                if (hasWrittenComment && !writer.isAtStartOfLine()) {
+                    writer.writeLine();
+                }
+            }
+            if (extendedDiagnostics) {
+                ts.performance.measure("commentTime", "beginEmitBodyWithDetachedCommetns");
+            }
+        }
+        function emitLeadingComments(pos, isEmittedNode) {
+            hasWrittenComment = false;
+            if (isEmittedNode) {
+                forEachLeadingCommentToEmit(pos, emitLeadingComment);
+            }
+            else if (pos === 0) {
+                // If the node will not be emitted in JS, remove all the comments(normal, pinned and ///) associated with the node,
+                // unless it is a triple slash comment at the top of the file.
+                // For Example:
+                //      /// <reference-path ...>
+                //      declare var x;
+                //      /// <reference-path ...>
+                //      interface F {}
+                //  The first /// will NOT be removed while the second one will be removed even though both node will not be emitted
+                forEachLeadingCommentToEmit(pos, emitTripleSlashLeadingComment);
+            }
+        }
+        function emitTripleSlashLeadingComment(commentPos, commentEnd, kind, hasTrailingNewLine, rangePos) {
+            if (isTripleSlashComment(commentPos, commentEnd)) {
+                emitLeadingComment(commentPos, commentEnd, kind, hasTrailingNewLine, rangePos);
+            }
+        }
+        function shouldWriteComment(text, pos) {
+            if (printerOptions.onlyPrintJsDocStyle) {
+                return (ts.isJSDocLikeText(text, pos) || ts.isPinnedComment(text, pos));
+            }
+            return true;
+        }
+        function emitLeadingComment(commentPos, commentEnd, kind, hasTrailingNewLine, rangePos) {
+            if (!shouldWriteComment(currentText, commentPos))
+                return;
+            if (!hasWrittenComment) {
+                ts.emitNewLineBeforeLeadingCommentOfPosition(currentLineMap, writer, rangePos, commentPos);
+                hasWrittenComment = true;
+            }
+            // Leading comments are emitted at /*leading comment1 */space/*leading comment*/space
+            if (emitPos)
+                emitPos(commentPos);
+            ts.writeCommentRange(currentText, currentLineMap, writer, commentPos, commentEnd, newLine);
+            if (emitPos)
+                emitPos(commentEnd);
+            if (hasTrailingNewLine) {
+                writer.writeLine();
+            }
+            else if (kind === 3 /* MultiLineCommentTrivia */) {
+                writer.write(" ");
+            }
+        }
+        function emitLeadingCommentsOfPosition(pos) {
+            if (disabled || pos === -1) {
+                return;
+            }
+            emitLeadingComments(pos, /*isEmittedNode*/ true);
+        }
+        function emitTrailingComments(pos) {
+            forEachTrailingCommentToEmit(pos, emitTrailingComment);
+        }
+        function emitTrailingComment(commentPos, commentEnd, _kind, hasTrailingNewLine) {
+            if (!shouldWriteComment(currentText, commentPos))
+                return;
+            // trailing comments are emitted at space/*trailing comment1 */space/*trailing comment2*/
+            if (!writer.isAtStartOfLine()) {
+                writer.write(" ");
+            }
+            if (emitPos)
+                emitPos(commentPos);
+            ts.writeCommentRange(currentText, currentLineMap, writer, commentPos, commentEnd, newLine);
+            if (emitPos)
+                emitPos(commentEnd);
+            if (hasTrailingNewLine) {
+                writer.writeLine();
+            }
+        }
+        function emitTrailingCommentsOfPosition(pos, prefixSpace) {
+            if (disabled) {
+                return;
+            }
+            if (extendedDiagnostics) {
+                ts.performance.mark("beforeEmitTrailingCommentsOfPosition");
+            }
+            forEachTrailingCommentToEmit(pos, prefixSpace ? emitTrailingComment : emitTrailingCommentOfPosition);
+            if (extendedDiagnostics) {
+                ts.performance.measure("commentTime", "beforeEmitTrailingCommentsOfPosition");
+            }
+        }
+        function emitTrailingCommentOfPosition(commentPos, commentEnd, _kind, hasTrailingNewLine) {
+            // trailing comments of a position are emitted at /*trailing comment1 */space/*trailing comment*/space
+            if (emitPos)
+                emitPos(commentPos);
+            ts.writeCommentRange(currentText, currentLineMap, writer, commentPos, commentEnd, newLine);
+            if (emitPos)
+                emitPos(commentEnd);
+            if (hasTrailingNewLine) {
+                writer.writeLine();
+            }
+            else {
+                writer.write(" ");
+            }
+        }
+        function forEachLeadingCommentToEmit(pos, cb) {
+            // Emit the leading comments only if the container's pos doesn't match because the container should take care of emitting these comments
+            if (containerPos === -1 || pos !== containerPos) {
+                if (hasDetachedComments(pos)) {
+                    forEachLeadingCommentWithoutDetachedComments(cb);
+                }
+                else {
+                    ts.forEachLeadingCommentRange(currentText, pos, cb, /*state*/ pos);
+                }
+            }
+        }
+        function forEachTrailingCommentToEmit(end, cb) {
+            // Emit the trailing comments only if the container's end doesn't match because the container should take care of emitting these comments
+            if (containerEnd === -1 || (end !== containerEnd && end !== declarationListContainerEnd)) {
+                ts.forEachTrailingCommentRange(currentText, end, cb);
+            }
+        }
+        function reset() {
+            currentSourceFile = undefined;
+            currentText = undefined;
+            currentLineMap = undefined;
+            detachedCommentsInfo = undefined;
+        }
+        function setWriter(output) {
+            writer = output;
+        }
+        function setSourceFile(sourceFile) {
+            currentSourceFile = sourceFile;
+            currentText = currentSourceFile.text;
+            currentLineMap = ts.getLineStarts(currentSourceFile);
+            detachedCommentsInfo = undefined;
+        }
+        function hasDetachedComments(pos) {
+            return detachedCommentsInfo !== undefined && ts.last(detachedCommentsInfo).nodePos === pos;
+        }
+        function forEachLeadingCommentWithoutDetachedComments(cb) {
+            // get the leading comments from detachedPos
+            var pos = ts.last(detachedCommentsInfo).detachedCommentEndPos;
+            if (detachedCommentsInfo.length - 1) {
+                detachedCommentsInfo.pop();
+            }
+            else {
+                detachedCommentsInfo = undefined;
+            }
+            ts.forEachLeadingCommentRange(currentText, pos, cb, /*state*/ pos);
+        }
+        function emitDetachedCommentsAndUpdateCommentsInfo(range) {
+            var currentDetachedCommentInfo = ts.emitDetachedComments(currentText, currentLineMap, writer, writeComment, range, newLine, disabled);
+            if (currentDetachedCommentInfo) {
+                if (detachedCommentsInfo) {
+                    detachedCommentsInfo.push(currentDetachedCommentInfo);
+                }
+                else {
+                    detachedCommentsInfo = [currentDetachedCommentInfo];
+                }
+            }
+        }
+        function writeComment(text, lineMap, writer, commentPos, commentEnd, newLine) {
+            if (!shouldWriteComment(currentText, commentPos))
+                return;
+            if (emitPos)
+                emitPos(commentPos);
+            ts.writeCommentRange(text, lineMap, writer, commentPos, commentEnd, newLine);
+            if (emitPos)
+                emitPos(commentEnd);
+        }
+        /**
+         * Determine if the given comment is a triple-slash
+         *
+         * @return true if the comment is a triple-slash comment else false
+         */
+        function isTripleSlashComment(commentPos, commentEnd) {
+            return ts.isRecognizedTripleSlashComment(currentText, commentPos, commentEnd);
+        }
+    }
+    ts.createCommentWriter = createCommentWriter;
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var infoExtension = ".tsbundleinfo";
+    var brackets = createBracketsMap();
+    /*@internal*/
+    /**
+     * Iterates over the source files that are expected to have an emit output.
+     *
+     * @param host An EmitHost.
+     * @param action The action to execute.
+     * @param sourceFilesOrTargetSourceFile
+     *   If an array, the full list of source files to emit.
+     *   Else, calls `getSourceFilesToEmit` with the (optional) target source file to determine the list of source files to emit.
+     */
+    function forEachEmittedFile(host, action, sourceFilesOrTargetSourceFile, emitOnlyDtsFiles) {
+        if (emitOnlyDtsFiles === void 0) { emitOnlyDtsFiles = false; }
+        var sourceFiles = ts.isArray(sourceFilesOrTargetSourceFile) ? sourceFilesOrTargetSourceFile : ts.getSourceFilesToEmit(host, sourceFilesOrTargetSourceFile);
+        var options = host.getCompilerOptions();
+        if (options.outFile || options.out) {
+            if (sourceFiles.length) {
+                var bundle = ts.createBundle(sourceFiles, host.getPrependNodes());
+                var result = action(getOutputPathsFor(bundle, host, emitOnlyDtsFiles), bundle);
+                if (result) {
+                    return result;
+                }
+            }
+        }
+        else {
+            for (var _a = 0, sourceFiles_1 = sourceFiles; _a < sourceFiles_1.length; _a++) {
+                var sourceFile = sourceFiles_1[_a];
+                var result = action(getOutputPathsFor(sourceFile, host, emitOnlyDtsFiles), sourceFile);
+                if (result) {
+                    return result;
+                }
+            }
+        }
+    }
+    ts.forEachEmittedFile = forEachEmittedFile;
+    /*@internal*/
+    function getOutputPathsFor(sourceFile, host, forceDtsPaths) {
+        var options = host.getCompilerOptions();
+        if (sourceFile.kind === 275 /* Bundle */) {
+            var jsFilePath = options.outFile || options.out;
+            var sourceMapFilePath = getSourceMapFilePath(jsFilePath, options);
+            var declarationFilePath = (forceDtsPaths || options.declaration) ? ts.removeFileExtension(jsFilePath) + ".d.ts" /* Dts */ : undefined;
+            var declarationMapPath = ts.getAreDeclarationMapsEnabled(options) ? declarationFilePath + ".map" : undefined;
+            var bundleInfoPath = options.references && jsFilePath ? (ts.removeFileExtension(jsFilePath) + infoExtension) : undefined;
+            return { jsFilePath: jsFilePath, sourceMapFilePath: sourceMapFilePath, declarationFilePath: declarationFilePath, declarationMapPath: declarationMapPath, bundleInfoPath: bundleInfoPath };
+        }
+        else {
+            var jsFilePath = ts.getOwnEmitOutputFilePath(sourceFile, host, getOutputExtension(sourceFile, options));
+            var sourceMapFilePath = ts.isJsonSourceFile(sourceFile) ? undefined : getSourceMapFilePath(jsFilePath, options);
+            // For legacy reasons (ie, we have baselines capturing the behavior), js files don't report a .d.ts output path - this would only matter if `declaration` and `allowJs` were both on, which is currently an error
+            var isJs = ts.isSourceFileJavaScript(sourceFile);
+            var declarationFilePath = ((forceDtsPaths || options.declaration) && !isJs) ? ts.getDeclarationEmitOutputFilePath(sourceFile, host) : undefined;
+            var declarationMapPath = ts.getAreDeclarationMapsEnabled(options) ? declarationFilePath + ".map" : undefined;
+            return { jsFilePath: jsFilePath, sourceMapFilePath: sourceMapFilePath, declarationFilePath: declarationFilePath, declarationMapPath: declarationMapPath, bundleInfoPath: undefined };
+        }
+    }
+    ts.getOutputPathsFor = getOutputPathsFor;
+    function getSourceMapFilePath(jsFilePath, options) {
+        return (options.sourceMap && !options.inlineSourceMap) ? jsFilePath + ".map" : undefined;
+    }
+    function createDefaultBundleInfo() {
+        return {
+            originalOffset: -1,
+            totalLength: -1
+        };
+    }
+    // JavaScript files are always LanguageVariant.JSX, as JSX syntax is allowed in .js files also.
+    // So for JavaScript files, '.jsx' is only emitted if the input was '.jsx', and JsxEmit.Preserve.
+    // For TypeScript, the only time to emit with a '.jsx' extension, is on JSX input, and JsxEmit.Preserve
+    /* @internal */
+    function getOutputExtension(sourceFile, options) {
+        if (ts.isJsonSourceFile(sourceFile)) {
+            return ".json" /* Json */;
+        }
+        if (options.jsx === 1 /* Preserve */) {
+            if (ts.isSourceFileJavaScript(sourceFile)) {
+                if (ts.fileExtensionIs(sourceFile.fileName, ".jsx" /* Jsx */)) {
+                    return ".jsx" /* Jsx */;
+                }
+            }
+            else if (sourceFile.languageVariant === 1 /* JSX */) {
+                // TypeScript source file preserving JSX syntax
+                return ".jsx" /* Jsx */;
+            }
+        }
+        return ".js" /* Js */;
+    }
+    ts.getOutputExtension = getOutputExtension;
+    /*@internal*/
+    // targetSourceFile is when users only want one file in entire project to be emitted. This is used in compileOnSave feature
+    function emitFiles(resolver, host, targetSourceFile, emitOnlyDtsFiles, transformers, declarationTransformers) {
+        var compilerOptions = host.getCompilerOptions();
+        var sourceMapDataList = (compilerOptions.sourceMap || compilerOptions.inlineSourceMap || ts.getAreDeclarationMapsEnabled(compilerOptions)) ? [] : undefined;
+        var emittedFilesList = compilerOptions.listEmittedFiles ? [] : undefined;
+        var emitterDiagnostics = ts.createDiagnosticCollection();
+        var newLine = host.getNewLine();
+        var writer = ts.createTextWriter(newLine);
+        var sourceMap = ts.createSourceMapWriter(host, writer);
+        var declarationSourceMap = ts.createSourceMapWriter(host, writer, {
+            sourceMap: compilerOptions.declarationMap,
+            sourceRoot: compilerOptions.sourceRoot,
+            mapRoot: compilerOptions.mapRoot,
+            extendedDiagnostics: compilerOptions.extendedDiagnostics,
+        });
+        var bundleInfo = createDefaultBundleInfo();
+        var emitSkipped = false;
+        // Emit each output file
+        ts.performance.mark("beforePrint");
+        forEachEmittedFile(host, emitSourceFileOrBundle, ts.getSourceFilesToEmit(host, targetSourceFile), emitOnlyDtsFiles);
+        ts.performance.measure("printTime", "beforePrint");
+        return {
+            emitSkipped: emitSkipped,
+            diagnostics: emitterDiagnostics.getDiagnostics(),
+            emittedFiles: emittedFilesList,
+            sourceMaps: sourceMapDataList,
+        };
+        function emitSourceFileOrBundle(_a, sourceFileOrBundle) {
+            var jsFilePath = _a.jsFilePath, sourceMapFilePath = _a.sourceMapFilePath, declarationFilePath = _a.declarationFilePath, declarationMapPath = _a.declarationMapPath, bundleInfoPath = _a.bundleInfoPath;
+            emitJsFileOrBundle(sourceFileOrBundle, jsFilePath, sourceMapFilePath, bundleInfoPath);
+            emitDeclarationFileOrBundle(sourceFileOrBundle, declarationFilePath, declarationMapPath);
+            if (!emitSkipped && emittedFilesList) {
+                if (!emitOnlyDtsFiles) {
+                    emittedFilesList.push(jsFilePath);
+                }
+                if (sourceMapFilePath) {
+                    emittedFilesList.push(sourceMapFilePath);
+                }
+                if (declarationFilePath) {
+                    emittedFilesList.push(declarationFilePath);
+                }
+                if (bundleInfoPath) {
+                    emittedFilesList.push(bundleInfoPath);
+                }
+            }
+        }
+        function emitJsFileOrBundle(sourceFileOrBundle, jsFilePath, sourceMapFilePath, bundleInfoPath) {
+            // Make sure not to write js file and source map file if any of them cannot be written
+            if (host.isEmitBlocked(jsFilePath) || compilerOptions.noEmit || compilerOptions.emitDeclarationOnly) {
+                emitSkipped = true;
+                return;
+            }
+            if (emitOnlyDtsFiles) {
+                return;
+            }
+            // Transform the source files
+            var transform = ts.transformNodes(resolver, host, compilerOptions, [sourceFileOrBundle], transformers, /*allowDtsFiles*/ false);
+            // Create a printer to print the nodes
+            var printer = createPrinter(__assign({}, compilerOptions, { noEmitHelpers: compilerOptions.noEmitHelpers }), {
+                // resolver hooks
+                hasGlobalName: resolver.hasGlobalName,
+                // transform hooks
+                onEmitNode: transform.emitNodeWithNotification,
+                substituteNode: transform.substituteNode,
+                // sourcemap hooks
+                onEmitSourceMapOfNode: sourceMap.emitNodeWithSourceMap,
+                onEmitSourceMapOfToken: sourceMap.emitTokenWithSourceMap,
+                onEmitSourceMapOfPosition: sourceMap.emitPos,
+                // emitter hooks
+                onSetSourceFile: setSourceFile,
+            });
+            ts.Debug.assert(transform.transformed.length === 1, "Should only see one output from the transform");
+            printSourceFileOrBundle(jsFilePath, sourceMapFilePath, transform.transformed[0], bundleInfoPath, printer, sourceMap);
+            // Clean up emit nodes on parse tree
+            transform.dispose();
+        }
+        function emitDeclarationFileOrBundle(sourceFileOrBundle, declarationFilePath, declarationMapPath) {
+            if (!(declarationFilePath && !ts.isInJavaScriptFile(sourceFileOrBundle))) {
+                return;
+            }
+            var sourceFiles = ts.isSourceFile(sourceFileOrBundle) ? [sourceFileOrBundle] : sourceFileOrBundle.sourceFiles;
+            // Setup and perform the transformation to retrieve declarations from the input files
+            var nonJsFiles = ts.filter(sourceFiles, ts.isSourceFileNotJavaScript);
+            var inputListOrBundle = (compilerOptions.outFile || compilerOptions.out) ? [ts.createBundle(nonJsFiles, !ts.isSourceFile(sourceFileOrBundle) ? sourceFileOrBundle.prepends : undefined)] : nonJsFiles;
+            var declarationTransform = ts.transformNodes(resolver, host, compilerOptions, inputListOrBundle, ts.concatenate([ts.transformDeclarations], declarationTransformers), /*allowDtsFiles*/ false);
+            if (ts.length(declarationTransform.diagnostics)) {
+                for (var _a = 0, _b = declarationTransform.diagnostics; _a < _b.length; _a++) {
+                    var diagnostic = _b[_a];
+                    emitterDiagnostics.add(diagnostic);
+                }
+            }
+            var declarationPrinter = createPrinter(__assign({}, compilerOptions, { onlyPrintJsDocStyle: true, noEmitHelpers: true }), {
+                // resolver hooks
+                hasGlobalName: resolver.hasGlobalName,
+                // sourcemap hooks
+                onEmitSourceMapOfNode: declarationSourceMap.emitNodeWithSourceMap,
+                onEmitSourceMapOfToken: declarationSourceMap.emitTokenWithSourceMap,
+                onEmitSourceMapOfPosition: declarationSourceMap.emitPos,
+                onSetSourceFile: setSourceFileForDeclarationSourceMaps,
+                // transform hooks
+                onEmitNode: declarationTransform.emitNodeWithNotification,
+                substituteNode: declarationTransform.substituteNode,
+            });
+            var declBlocked = (!!declarationTransform.diagnostics && !!declarationTransform.diagnostics.length) || !!host.isEmitBlocked(declarationFilePath) || !!compilerOptions.noEmit;
+            emitSkipped = emitSkipped || declBlocked;
+            if (!declBlocked || emitOnlyDtsFiles) {
+                ts.Debug.assert(declarationTransform.transformed.length === 1, "Should only see one output from the decl transform");
+                printSourceFileOrBundle(declarationFilePath, declarationMapPath, declarationTransform.transformed[0], /* bundleInfopath*/ undefined, declarationPrinter, declarationSourceMap);
+            }
+            declarationTransform.dispose();
+        }
+        function printSourceFileOrBundle(jsFilePath, sourceMapFilePath, sourceFileOrBundle, bundleInfoPath, printer, mapRecorder) {
+            var bundle = sourceFileOrBundle.kind === 275 /* Bundle */ ? sourceFileOrBundle : undefined;
+            var sourceFile = sourceFileOrBundle.kind === 274 /* SourceFile */ ? sourceFileOrBundle : undefined;
+            var sourceFiles = bundle ? bundle.sourceFiles : [sourceFile];
+            mapRecorder.initialize(jsFilePath, sourceMapFilePath || "", sourceFileOrBundle, sourceMapDataList);
+            if (bundle) {
+                printer.writeBundle(bundle, writer, bundleInfo);
+            }
+            else {
+                printer.writeFile(sourceFile, writer);
+            }
+            writer.writeLine();
+            var sourceMappingURL = mapRecorder.getSourceMappingURL();
+            if (sourceMappingURL) {
+                writer.write("//# " + "sourceMappingURL" + "=" + sourceMappingURL); // Sometimes tools can sometimes see this line as a source mapping url comment
+            }
+            // Write the source map
+            if (sourceMapFilePath) {
+                ts.writeFile(host, emitterDiagnostics, sourceMapFilePath, mapRecorder.getText(), /*writeByteOrderMark*/ false, sourceFiles);
+            }
+            // Write the output file
+            ts.writeFile(host, emitterDiagnostics, jsFilePath, writer.getText(), !!compilerOptions.emitBOM, sourceFiles);
+            // Write bundled offset information if applicable
+            if (bundleInfoPath) {
+                bundleInfo.totalLength = writer.getTextPos();
+                ts.writeFile(host, emitterDiagnostics, bundleInfoPath, JSON.stringify(bundleInfo, undefined, 2), /*writeByteOrderMark*/ false);
+            }
+            // Reset state
+            mapRecorder.reset();
+            writer.clear();
+            bundleInfo = createDefaultBundleInfo();
+        }
+        function setSourceFile(node) {
+            sourceMap.setSourceFile(node);
+        }
+        function setSourceFileForDeclarationSourceMaps(node) {
+            declarationSourceMap.setSourceFile(node);
+        }
+    }
+    ts.emitFiles = emitFiles;
+    var PipelinePhase;
+    (function (PipelinePhase) {
+        PipelinePhase[PipelinePhase["Notification"] = 0] = "Notification";
+        PipelinePhase[PipelinePhase["Comments"] = 1] = "Comments";
+        PipelinePhase[PipelinePhase["SourceMaps"] = 2] = "SourceMaps";
+        PipelinePhase[PipelinePhase["Emit"] = 3] = "Emit";
+    })(PipelinePhase || (PipelinePhase = {}));
+    function createPrinter(printerOptions, handlers) {
+        if (printerOptions === void 0) { printerOptions = {}; }
+        if (handlers === void 0) { handlers = {}; }
+        var hasGlobalName = handlers.hasGlobalName, onEmitSourceMapOfNode = handlers.onEmitSourceMapOfNode, onEmitSourceMapOfToken = handlers.onEmitSourceMapOfToken, onEmitSourceMapOfPosition = handlers.onEmitSourceMapOfPosition, onEmitNode = handlers.onEmitNode, onSetSourceFile = handlers.onSetSourceFile, substituteNode = handlers.substituteNode, onBeforeEmitNodeArray = handlers.onBeforeEmitNodeArray, onAfterEmitNodeArray = handlers.onAfterEmitNodeArray, onBeforeEmitToken = handlers.onBeforeEmitToken, onAfterEmitToken = handlers.onAfterEmitToken;
+        var newLine = ts.getNewLineCharacter(printerOptions);
+        var comments = ts.createCommentWriter(printerOptions, onEmitSourceMapOfPosition);
+        var emitNodeWithComments = comments.emitNodeWithComments, emitBodyWithDetachedComments = comments.emitBodyWithDetachedComments, emitTrailingCommentsOfPosition = comments.emitTrailingCommentsOfPosition, emitLeadingCommentsOfPosition = comments.emitLeadingCommentsOfPosition;
+        var currentSourceFile;
+        var nodeIdToGeneratedName; // Map of generated names for specific nodes.
+        var autoGeneratedIdToGeneratedName; // Map of generated names for temp and loop variables.
+        var generatedNames; // Set of names generated by the NameGenerator.
+        var tempFlagsStack; // Stack of enclosing name generation scopes.
+        var tempFlags; // TempFlags for the current name generation scope.
+        var reservedNamesStack; // Stack of TempFlags reserved in enclosing name generation scopes.
+        var reservedNames; // TempFlags to reserve in nested name generation scopes.
+        var writer;
+        var ownWriter;
+        var write = writeBase;
+        var commitPendingSemicolon = ts.noop;
+        var writeSemicolon = writeSemicolonInternal;
+        var pendingSemicolon = false;
+        if (printerOptions.omitTrailingSemicolon) {
+            commitPendingSemicolon = commitPendingSemicolonInternal;
+            writeSemicolon = deferWriteSemicolon;
+        }
+        var syntheticParent = { pos: -1, end: -1 };
+        var moduleKind = ts.getEmitModuleKind(printerOptions);
+        var bundledHelpers = ts.createMap();
+        var isOwnFileEmit;
+        reset();
+        return {
+            // public API
+            printNode: printNode,
+            printList: printList,
+            printFile: printFile,
+            printBundle: printBundle,
+            // internal API
+            writeNode: writeNode,
+            writeList: writeList,
+            writeFile: writeFile,
+            writeBundle: writeBundle
+        };
+        function printNode(hint, node, sourceFile) {
+            switch (hint) {
+                case 0 /* SourceFile */:
+                    ts.Debug.assert(ts.isSourceFile(node), "Expected a SourceFile node.");
+                    break;
+                case 2 /* IdentifierName */:
+                    ts.Debug.assert(ts.isIdentifier(node), "Expected an Identifier node.");
+                    break;
+                case 1 /* Expression */:
+                    ts.Debug.assert(ts.isExpression(node), "Expected an Expression node.");
+                    break;
+            }
+            switch (node.kind) {
+                case 274 /* SourceFile */: return printFile(node);
+                case 275 /* Bundle */: return printBundle(node);
+                case 276 /* UnparsedSource */: return printUnparsedSource(node);
+            }
+            writeNode(hint, node, sourceFile, beginPrint());
+            return endPrint();
+        }
+        function printList(format, nodes, sourceFile) {
+            writeList(format, nodes, sourceFile, beginPrint());
+            return endPrint();
+        }
+        function printBundle(bundle) {
+            writeBundle(bundle, beginPrint());
+            return endPrint();
+        }
+        function printFile(sourceFile) {
+            writeFile(sourceFile, beginPrint());
+            return endPrint();
+        }
+        function printUnparsedSource(unparsed) {
+            writeUnparsedSource(unparsed, beginPrint());
+            return endPrint();
+        }
+        function writeNode(hint, node, sourceFile, output) {
+            var previousWriter = writer;
+            setWriter(output);
+            print(hint, node, sourceFile);
+            reset();
+            writer = previousWriter;
+        }
+        function writeList(format, nodes, sourceFile, output) {
+            var previousWriter = writer;
+            setWriter(output);
+            if (sourceFile) {
+                setSourceFile(sourceFile);
+            }
+            emitList(syntheticParent, nodes, format);
+            reset();
+            writer = previousWriter;
+        }
+        function writeBundle(bundle, output, bundleInfo) {
+            isOwnFileEmit = false;
+            var previousWriter = writer;
+            setWriter(output);
+            emitShebangIfNeeded(bundle);
+            emitPrologueDirectivesIfNeeded(bundle);
+            emitHelpers(bundle);
+            emitSyntheticTripleSlashReferencesIfNeeded(bundle);
+            for (var _a = 0, _b = bundle.prepends; _a < _b.length; _a++) {
+                var prepend = _b[_a];
+                print(4 /* Unspecified */, prepend, /*sourceFile*/ undefined);
+                writeLine();
+            }
+            if (bundleInfo) {
+                bundleInfo.originalOffset = writer.getTextPos();
+            }
+            for (var _c = 0, _d = bundle.sourceFiles; _c < _d.length; _c++) {
+                var sourceFile = _d[_c];
+                print(0 /* SourceFile */, sourceFile, sourceFile);
+            }
+            reset();
+            writer = previousWriter;
+        }
+        function writeUnparsedSource(unparsed, output) {
+            var previousWriter = writer;
+            setWriter(output);
+            print(4 /* Unspecified */, unparsed, /*sourceFile*/ undefined);
+            reset();
+            writer = previousWriter;
+        }
+        function writeFile(sourceFile, output) {
+            isOwnFileEmit = true;
+            var previousWriter = writer;
+            setWriter(output);
+            emitShebangIfNeeded(sourceFile);
+            emitPrologueDirectivesIfNeeded(sourceFile);
+            print(0 /* SourceFile */, sourceFile, sourceFile);
+            reset();
+            writer = previousWriter;
+        }
+        function beginPrint() {
+            return ownWriter || (ownWriter = ts.createTextWriter(newLine));
+        }
+        function endPrint() {
+            var text = ownWriter.getText();
+            ownWriter.clear();
+            return text;
+        }
+        function print(hint, node, sourceFile) {
+            if (sourceFile) {
+                setSourceFile(sourceFile);
+            }
+            var pipelinePhase = getPipelinePhase(0 /* Notification */, hint);
+            pipelinePhase(hint, node);
+        }
+        function setSourceFile(sourceFile) {
+            currentSourceFile = sourceFile;
+            comments.setSourceFile(sourceFile);
+            if (onSetSourceFile) {
+                onSetSourceFile(sourceFile);
+            }
+        }
+        function setWriter(output) {
+            writer = output; // TODO: GH#18217
+            comments.setWriter(output);
+        }
+        function reset() {
+            nodeIdToGeneratedName = [];
+            autoGeneratedIdToGeneratedName = [];
+            generatedNames = ts.createMap();
+            tempFlagsStack = [];
+            tempFlags = 0 /* Auto */;
+            reservedNamesStack = [];
+            comments.reset();
+            setWriter(/*output*/ undefined);
+        }
+        function emit(node) {
+            if (!node)
+                return;
+            var pipelinePhase = getPipelinePhase(0 /* Notification */, 4 /* Unspecified */);
+            pipelinePhase(4 /* Unspecified */, node);
+        }
+        function emitIdentifierName(node) {
+            if (!node)
+                return;
+            var pipelinePhase = getPipelinePhase(0 /* Notification */, 2 /* IdentifierName */);
+            pipelinePhase(2 /* IdentifierName */, node);
+        }
+        function emitExpression(node) {
+            if (!node)
+                return;
+            var pipelinePhase = getPipelinePhase(0 /* Notification */, 1 /* Expression */);
+            pipelinePhase(1 /* Expression */, node);
+        }
+        function getPipelinePhase(phase, hint) {
+            switch (phase) {
+                case 0 /* Notification */:
+                    if (onEmitNode) {
+                        return pipelineEmitWithNotification;
+                    }
+                // falls through
+                case 1 /* Comments */:
+                    if (emitNodeWithComments && hint !== 0 /* SourceFile */) {
+                        return pipelineEmitWithComments;
+                    }
+                    return pipelineEmitWithoutComments;
+                case 2 /* SourceMaps */:
+                    if (onEmitSourceMapOfNode && hint !== 0 /* SourceFile */ && hint !== 2 /* IdentifierName */) {
+                        return pipelineEmitWithSourceMap;
+                    }
+                // falls through
+                case 3 /* Emit */:
+                    return pipelineEmitWithHint;
+                default:
+                    return ts.Debug.assertNever(phase, "Unexpected value for PipelinePhase: " + phase);
+            }
+        }
+        function getNextPipelinePhase(currentPhase, hint) {
+            return getPipelinePhase(currentPhase + 1, hint);
+        }
+        function pipelineEmitWithNotification(hint, node) {
+            ts.Debug.assertDefined(onEmitNode)(hint, node, getNextPipelinePhase(0 /* Notification */, hint));
+        }
+        function pipelineEmitWithComments(hint, node) {
+            ts.Debug.assertDefined(emitNodeWithComments);
+            ts.Debug.assert(hint !== 0 /* SourceFile */);
+            emitNodeWithComments(hint, trySubstituteNode(hint, node), getNextPipelinePhase(1 /* Comments */, hint));
+        }
+        function pipelineEmitWithoutComments(hint, node) {
+            var pipelinePhase = getNextPipelinePhase(1 /* Comments */, hint);
+            pipelinePhase(hint, trySubstituteNode(hint, node));
+        }
+        function pipelineEmitWithSourceMap(hint, node) {
+            ts.Debug.assert(hint !== 0 /* SourceFile */ && hint !== 2 /* IdentifierName */);
+            ts.Debug.assertDefined(onEmitSourceMapOfNode)(hint, node, pipelineEmitWithHint);
+        }
+        function pipelineEmitWithHint(hint, node) {
+            if (hint === 0 /* SourceFile */)
+                return emitSourceFile(ts.cast(node, ts.isSourceFile));
+            if (hint === 2 /* IdentifierName */)
+                return emitIdentifier(ts.cast(node, ts.isIdentifier));
+            if (hint === 3 /* MappedTypeParameter */)
+                return emitMappedTypeParameter(ts.cast(node, ts.isTypeParameterDeclaration));
+            if (hint === 4 /* Unspecified */) {
+                if (ts.isKeyword(node.kind))
+                    return writeTokenNode(node, writeKeyword);
+                switch (node.kind) {
+                    // Pseudo-literals
+                    case 14 /* TemplateHead */:
+                    case 15 /* TemplateMiddle */:
+                    case 16 /* TemplateTail */:
+                        return emitLiteral(node);
+                    case 276 /* UnparsedSource */:
+                        return emitUnparsedSource(node);
+                    // Identifiers
+                    case 71 /* Identifier */:
+                        return emitIdentifier(node);
+                    // Parse tree nodes
+                    // Names
+                    case 146 /* QualifiedName */:
+                        return emitQualifiedName(node);
+                    case 147 /* ComputedPropertyName */:
+                        return emitComputedPropertyName(node);
+                    // Signature elements
+                    case 148 /* TypeParameter */:
+                        return emitTypeParameter(node);
+                    case 149 /* Parameter */:
+                        return emitParameter(node);
+                    case 150 /* Decorator */:
+                        return emitDecorator(node);
+                    // Type members
+                    case 151 /* PropertySignature */:
+                        return emitPropertySignature(node);
+                    case 152 /* PropertyDeclaration */:
+                        return emitPropertyDeclaration(node);
+                    case 153 /* MethodSignature */:
+                        return emitMethodSignature(node);
+                    case 154 /* MethodDeclaration */:
+                        return emitMethodDeclaration(node);
+                    case 155 /* Constructor */:
+                        return emitConstructor(node);
+                    case 156 /* GetAccessor */:
+                    case 157 /* SetAccessor */:
+                        return emitAccessorDeclaration(node);
+                    case 158 /* CallSignature */:
+                        return emitCallSignature(node);
+                    case 159 /* ConstructSignature */:
+                        return emitConstructSignature(node);
+                    case 160 /* IndexSignature */:
+                        return emitIndexSignature(node);
+                    // Types
+                    case 161 /* TypePredicate */:
+                        return emitTypePredicate(node);
+                    case 162 /* TypeReference */:
+                        return emitTypeReference(node);
+                    case 163 /* FunctionType */:
+                        return emitFunctionType(node);
+                    case 284 /* JSDocFunctionType */:
+                        return emitJSDocFunctionType(node);
+                    case 164 /* ConstructorType */:
+                        return emitConstructorType(node);
+                    case 165 /* TypeQuery */:
+                        return emitTypeQuery(node);
+                    case 166 /* TypeLiteral */:
+                        return emitTypeLiteral(node);
+                    case 167 /* ArrayType */:
+                        return emitArrayType(node);
+                    case 168 /* TupleType */:
+                        return emitTupleType(node);
+                    case 169 /* UnionType */:
+                        return emitUnionType(node);
+                    case 170 /* IntersectionType */:
+                        return emitIntersectionType(node);
+                    case 171 /* ConditionalType */:
+                        return emitConditionalType(node);
+                    case 172 /* InferType */:
+                        return emitInferType(node);
+                    case 173 /* ParenthesizedType */:
+                        return emitParenthesizedType(node);
+                    case 207 /* ExpressionWithTypeArguments */:
+                        return emitExpressionWithTypeArguments(node);
+                    case 174 /* ThisType */:
+                        return emitThisType();
+                    case 175 /* TypeOperator */:
+                        return emitTypeOperator(node);
+                    case 176 /* IndexedAccessType */:
+                        return emitIndexedAccessType(node);
+                    case 177 /* MappedType */:
+                        return emitMappedType(node);
+                    case 178 /* LiteralType */:
+                        return emitLiteralType(node);
+                    case 179 /* ImportType */:
+                        return emitImportTypeNode(node);
+                    case 279 /* JSDocAllType */:
+                        write("*");
+                        return;
+                    case 280 /* JSDocUnknownType */:
+                        write("?");
+                        return;
+                    case 281 /* JSDocNullableType */:
+                        return emitJSDocNullableType(node);
+                    case 282 /* JSDocNonNullableType */:
+                        return emitJSDocNonNullableType(node);
+                    case 283 /* JSDocOptionalType */:
+                        return emitJSDocOptionalType(node);
+                    case 285 /* JSDocVariadicType */:
+                        return emitJSDocVariadicType(node);
+                    // Binding patterns
+                    case 180 /* ObjectBindingPattern */:
+                        return emitObjectBindingPattern(node);
+                    case 181 /* ArrayBindingPattern */:
+                        return emitArrayBindingPattern(node);
+                    case 182 /* BindingElement */:
+                        return emitBindingElement(node);
+                    // Misc
+                    case 211 /* TemplateSpan */:
+                        return emitTemplateSpan(node);
+                    case 212 /* SemicolonClassElement */:
+                        return emitSemicolonClassElement();
+                    // Statements
+                    case 213 /* Block */:
+                        return emitBlock(node);
+                    case 214 /* VariableStatement */:
+                        return emitVariableStatement(node);
+                    case 215 /* EmptyStatement */:
+                        return emitEmptyStatement();
+                    case 216 /* ExpressionStatement */:
+                        return emitExpressionStatement(node);
+                    case 217 /* IfStatement */:
+                        return emitIfStatement(node);
+                    case 218 /* DoStatement */:
+                        return emitDoStatement(node);
+                    case 219 /* WhileStatement */:
+                        return emitWhileStatement(node);
+                    case 220 /* ForStatement */:
+                        return emitForStatement(node);
+                    case 221 /* ForInStatement */:
+                        return emitForInStatement(node);
+                    case 222 /* ForOfStatement */:
+                        return emitForOfStatement(node);
+                    case 223 /* ContinueStatement */:
+                        return emitContinueStatement(node);
+                    case 224 /* BreakStatement */:
+                        return emitBreakStatement(node);
+                    case 225 /* ReturnStatement */:
+                        return emitReturnStatement(node);
+                    case 226 /* WithStatement */:
+                        return emitWithStatement(node);
+                    case 227 /* SwitchStatement */:
+                        return emitSwitchStatement(node);
+                    case 228 /* LabeledStatement */:
+                        return emitLabeledStatement(node);
+                    case 229 /* ThrowStatement */:
+                        return emitThrowStatement(node);
+                    case 230 /* TryStatement */:
+                        return emitTryStatement(node);
+                    case 231 /* DebuggerStatement */:
+                        return emitDebuggerStatement(node);
+                    // Declarations
+                    case 232 /* VariableDeclaration */:
+                        return emitVariableDeclaration(node);
+                    case 233 /* VariableDeclarationList */:
+                        return emitVariableDeclarationList(node);
+                    case 234 /* FunctionDeclaration */:
+                        return emitFunctionDeclaration(node);
+                    case 235 /* ClassDeclaration */:
+                        return emitClassDeclaration(node);
+                    case 236 /* InterfaceDeclaration */:
+                        return emitInterfaceDeclaration(node);
+                    case 237 /* TypeAliasDeclaration */:
+                        return emitTypeAliasDeclaration(node);
+                    case 238 /* EnumDeclaration */:
+                        return emitEnumDeclaration(node);
+                    case 239 /* ModuleDeclaration */:
+                        return emitModuleDeclaration(node);
+                    case 240 /* ModuleBlock */:
+                        return emitModuleBlock(node);
+                    case 241 /* CaseBlock */:
+                        return emitCaseBlock(node);
+                    case 242 /* NamespaceExportDeclaration */:
+                        return emitNamespaceExportDeclaration(node);
+                    case 243 /* ImportEqualsDeclaration */:
+                        return emitImportEqualsDeclaration(node);
+                    case 244 /* ImportDeclaration */:
+                        return emitImportDeclaration(node);
+                    case 245 /* ImportClause */:
+                        return emitImportClause(node);
+                    case 246 /* NamespaceImport */:
+                        return emitNamespaceImport(node);
+                    case 247 /* NamedImports */:
+                        return emitNamedImports(node);
+                    case 248 /* ImportSpecifier */:
+                        return emitImportSpecifier(node);
+                    case 249 /* ExportAssignment */:
+                        return emitExportAssignment(node);
+                    case 250 /* ExportDeclaration */:
+                        return emitExportDeclaration(node);
+                    case 251 /* NamedExports */:
+                        return emitNamedExports(node);
+                    case 252 /* ExportSpecifier */:
+                        return emitExportSpecifier(node);
+                    case 253 /* MissingDeclaration */:
+                        return;
+                    // Module references
+                    case 254 /* ExternalModuleReference */:
+                        return emitExternalModuleReference(node);
+                    // JSX (non-expression)
+                    case 10 /* JsxText */:
+                        return emitJsxText(node);
+                    case 257 /* JsxOpeningElement */:
+                    case 260 /* JsxOpeningFragment */:
+                        return emitJsxOpeningElementOrFragment(node);
+                    case 258 /* JsxClosingElement */:
+                    case 261 /* JsxClosingFragment */:
+                        return emitJsxClosingElementOrFragment(node);
+                    case 262 /* JsxAttribute */:
+                        return emitJsxAttribute(node);
+                    case 263 /* JsxAttributes */:
+                        return emitJsxAttributes(node);
+                    case 264 /* JsxSpreadAttribute */:
+                        return emitJsxSpreadAttribute(node);
+                    case 265 /* JsxExpression */:
+                        return emitJsxExpression(node);
+                    // Clauses
+                    case 266 /* CaseClause */:
+                        return emitCaseClause(node);
+                    case 267 /* DefaultClause */:
+                        return emitDefaultClause(node);
+                    case 268 /* HeritageClause */:
+                        return emitHeritageClause(node);
+                    case 269 /* CatchClause */:
+                        return emitCatchClause(node);
+                    // Property assignments
+                    case 270 /* PropertyAssignment */:
+                        return emitPropertyAssignment(node);
+                    case 271 /* ShorthandPropertyAssignment */:
+                        return emitShorthandPropertyAssignment(node);
+                    case 272 /* SpreadAssignment */:
+                        return emitSpreadAssignment(node);
+                    // Enum
+                    case 273 /* EnumMember */:
+                        return emitEnumMember(node);
+                    // JSDoc nodes (ignored)
+                    // Transformation nodes (ignored)
+                }
+                if (ts.isExpression(node)) {
+                    hint = 1 /* Expression */;
+                    node = trySubstituteNode(1 /* Expression */, node);
+                }
+                else if (ts.isToken(node)) {
+                    return writeTokenNode(node, writePunctuation);
+                }
+            }
+            if (hint === 1 /* Expression */) {
+                switch (node.kind) {
+                    // Literals
+                    case 8 /* NumericLiteral */:
+                        return emitNumericLiteral(node);
+                    case 9 /* StringLiteral */:
+                    case 12 /* RegularExpressionLiteral */:
+                    case 13 /* NoSubstitutionTemplateLiteral */:
+                        return emitLiteral(node);
+                    // Identifiers
+                    case 71 /* Identifier */:
+                        return emitIdentifier(node);
+                    // Reserved words
+                    case 86 /* FalseKeyword */:
+                    case 95 /* NullKeyword */:
+                    case 97 /* SuperKeyword */:
+                    case 101 /* TrueKeyword */:
+                    case 99 /* ThisKeyword */:
+                    case 91 /* ImportKeyword */:
+                        writeTokenNode(node, writeKeyword);
+                        return;
+                    // Expressions
+                    case 183 /* ArrayLiteralExpression */:
+                        return emitArrayLiteralExpression(node);
+                    case 184 /* ObjectLiteralExpression */:
+                        return emitObjectLiteralExpression(node);
+                    case 185 /* PropertyAccessExpression */:
+                        return emitPropertyAccessExpression(node);
+                    case 186 /* ElementAccessExpression */:
+                        return emitElementAccessExpression(node);
+                    case 187 /* CallExpression */:
+                        return emitCallExpression(node);
+                    case 188 /* NewExpression */:
+                        return emitNewExpression(node);
+                    case 189 /* TaggedTemplateExpression */:
+                        return emitTaggedTemplateExpression(node);
+                    case 190 /* TypeAssertionExpression */:
+                        return emitTypeAssertionExpression(node);
+                    case 191 /* ParenthesizedExpression */:
+                        return emitParenthesizedExpression(node);
+                    case 192 /* FunctionExpression */:
+                        return emitFunctionExpression(node);
+                    case 193 /* ArrowFunction */:
+                        return emitArrowFunction(node);
+                    case 194 /* DeleteExpression */:
+                        return emitDeleteExpression(node);
+                    case 195 /* TypeOfExpression */:
+                        return emitTypeOfExpression(node);
+                    case 196 /* VoidExpression */:
+                        return emitVoidExpression(node);
+                    case 197 /* AwaitExpression */:
+                        return emitAwaitExpression(node);
+                    case 198 /* PrefixUnaryExpression */:
+                        return emitPrefixUnaryExpression(node);
+                    case 199 /* PostfixUnaryExpression */:
+                        return emitPostfixUnaryExpression(node);
+                    case 200 /* BinaryExpression */:
+                        return emitBinaryExpression(node);
+                    case 201 /* ConditionalExpression */:
+                        return emitConditionalExpression(node);
+                    case 202 /* TemplateExpression */:
+                        return emitTemplateExpression(node);
+                    case 203 /* YieldExpression */:
+                        return emitYieldExpression(node);
+                    case 204 /* SpreadElement */:
+                        return emitSpreadExpression(node);
+                    case 205 /* ClassExpression */:
+                        return emitClassExpression(node);
+                    case 206 /* OmittedExpression */:
+                        return;
+                    case 208 /* AsExpression */:
+                        return emitAsExpression(node);
+                    case 209 /* NonNullExpression */:
+                        return emitNonNullExpression(node);
+                    case 210 /* MetaProperty */:
+                        return emitMetaProperty(node);
+                    // JSX
+                    case 255 /* JsxElement */:
+                        return emitJsxElement(node);
+                    case 256 /* JsxSelfClosingElement */:
+                        return emitJsxSelfClosingElement(node);
+                    case 259 /* JsxFragment */:
+                        return emitJsxFragment(node);
+                    // Transformation nodes
+                    case 301 /* PartiallyEmittedExpression */:
+                        return emitPartiallyEmittedExpression(node);
+                    case 302 /* CommaListExpression */:
+                        return emitCommaList(node);
+                }
+            }
+        }
+        function emitMappedTypeParameter(node) {
+            emit(node.name);
+            writeSpace();
+            writeKeyword("in");
+            writeSpace();
+            emit(node.constraint);
+        }
+        function trySubstituteNode(hint, node) {
+            return node && substituteNode && substituteNode(hint, node) || node;
+        }
+        function emitHelpers(node) {
+            var helpersEmitted = false;
+            var bundle = node.kind === 275 /* Bundle */ ? node : undefined;
+            if (bundle && moduleKind === ts.ModuleKind.None) {
+                return;
+            }
+            var numNodes = bundle ? bundle.sourceFiles.length : 1;
+            for (var i = 0; i < numNodes; i++) {
+                var currentNode = bundle ? bundle.sourceFiles[i] : node;
+                var sourceFile = ts.isSourceFile(currentNode) ? currentNode : currentSourceFile;
+                var shouldSkip = printerOptions.noEmitHelpers || ts.getExternalHelpersModuleName(sourceFile) !== undefined;
+                var shouldBundle = ts.isSourceFile(currentNode) && !isOwnFileEmit;
+                var helpers = ts.getEmitHelpers(currentNode);
+                if (helpers) {
+                    for (var _a = 0, _b = ts.stableSort(helpers, ts.compareEmitHelpers); _a < _b.length; _a++) {
+                        var helper = _b[_a];
+                        if (!helper.scoped) {
+                            // Skip the helper if it can be skipped and the noEmitHelpers compiler
+                            // option is set, or if it can be imported and the importHelpers compiler
+                            // option is set.
+                            if (shouldSkip)
+                                continue;
+                            // Skip the helper if it can be bundled but hasn't already been emitted and we
+                            // are emitting a bundled module.
+                            if (shouldBundle) {
+                                if (bundledHelpers.get(helper.name)) {
+                                    continue;
+                                }
+                                bundledHelpers.set(helper.name, true);
+                            }
+                        }
+                        else if (bundle) {
+                            // Skip the helper if it is scoped and we are emitting bundled helpers
+                            continue;
+                        }
+                        if (typeof helper.text === "string") {
+                            writeLines(helper.text);
+                        }
+                        else {
+                            writeLines(helper.text(makeFileLevelOptmiisticUniqueName));
+                        }
+                        helpersEmitted = true;
+                    }
+                }
+            }
+            return helpersEmitted;
+        }
+        //
+        // Literals/Pseudo-literals
+        //
+        // SyntaxKind.NumericLiteral
+        function emitNumericLiteral(node) {
+            emitLiteral(node);
+        }
+        // SyntaxKind.StringLiteral
+        // SyntaxKind.RegularExpressionLiteral
+        // SyntaxKind.NoSubstitutionTemplateLiteral
+        // SyntaxKind.TemplateHead
+        // SyntaxKind.TemplateMiddle
+        // SyntaxKind.TemplateTail
+        function emitLiteral(node) {
+            var text = getLiteralTextOfNode(node);
+            if ((printerOptions.sourceMap || printerOptions.inlineSourceMap)
+                && (node.kind === 9 /* StringLiteral */ || ts.isTemplateLiteralKind(node.kind))) {
+                writeLiteral(text);
+            }
+            else {
+                // Quick info expects all literals to be called with writeStringLiteral, as there's no specific type for numberLiterals
+                writeStringLiteral(text);
+            }
+        }
+        // SyntaxKind.UnparsedSource
+        function emitUnparsedSource(unparsed) {
+            writer.rawWrite(unparsed.text);
+        }
+        //
+        // Identifiers
+        //
+        function emitIdentifier(node) {
+            var writeText = node.symbol ? writeSymbol : write;
+            writeText(getTextOfNode(node, /*includeTrivia*/ false), node.symbol);
+            emitList(node, node.typeArguments, 26896 /* TypeParameters */); // Call emitList directly since it could be an array of TypeParameterDeclarations _or_ type arguments
+        }
+        //
+        // Names
+        //
+        function emitQualifiedName(node) {
+            emitEntityName(node.left);
+            writePunctuation(".");
+            emit(node.right);
+        }
+        function emitEntityName(node) {
+            if (node.kind === 71 /* Identifier */) {
+                emitExpression(node);
+            }
+            else {
+                emit(node);
+            }
+        }
+        function emitComputedPropertyName(node) {
+            writePunctuation("[");
+            emitExpression(node.expression);
+            writePunctuation("]");
+        }
+        //
+        // Signature elements
+        //
+        function emitTypeParameter(node) {
+            emit(node.name);
+            if (node.constraint) {
+                writeSpace();
+                writeKeyword("extends");
+                writeSpace();
+                emit(node.constraint);
+            }
+            if (node.default) {
+                writeSpace();
+                writeOperator("=");
+                writeSpace();
+                emit(node.default);
+            }
+        }
+        function emitParameter(node) {
+            emitDecorators(node, node.decorators);
+            emitModifiers(node, node.modifiers);
+            emit(node.dotDotDotToken);
+            emitNodeWithWriter(node.name, writeParameter);
+            emit(node.questionToken);
+            if (node.parent && node.parent.kind === 284 /* JSDocFunctionType */ && !node.name) {
+                emit(node.type);
+            }
+            else {
+                emitTypeAnnotation(node.type);
+            }
+            // The comment position has to fallback to any present node within the parameterdeclaration because as it turns out, the parser can make parameter declarations with _just_ an initializer.
+            emitInitializer(node.initializer, node.type ? node.type.end : node.questionToken ? node.questionToken.end : node.name ? node.name.end : node.modifiers ? node.modifiers.end : node.decorators ? node.decorators.end : node.pos, node);
+        }
+        function emitDecorator(decorator) {
+            writePunctuation("@");
+            emitExpression(decorator.expression);
+        }
+        //
+        // Type members
+        //
+        function emitPropertySignature(node) {
+            emitDecorators(node, node.decorators);
+            emitModifiers(node, node.modifiers);
+            emitNodeWithWriter(node.name, writeProperty);
+            emit(node.questionToken);
+            emitTypeAnnotation(node.type);
+            writeSemicolon();
+        }
+        function emitPropertyDeclaration(node) {
+            emitDecorators(node, node.decorators);
+            emitModifiers(node, node.modifiers);
+            emit(node.name);
+            emit(node.questionToken);
+            emit(node.exclamationToken);
+            emitTypeAnnotation(node.type);
+            emitInitializer(node.initializer, node.type ? node.type.end : node.questionToken ? node.questionToken.end : node.name.end, node);
+            writeSemicolon();
+        }
+        function emitMethodSignature(node) {
+            pushNameGenerationScope(node);
+            emitDecorators(node, node.decorators);
+            emitModifiers(node, node.modifiers);
+            emit(node.name);
+            emit(node.questionToken);
+            emitTypeParameters(node, node.typeParameters);
+            emitParameters(node, node.parameters);
+            emitTypeAnnotation(node.type);
+            writeSemicolon();
+            popNameGenerationScope(node);
+        }
+        function emitMethodDeclaration(node) {
+            emitDecorators(node, node.decorators);
+            emitModifiers(node, node.modifiers);
+            emit(node.asteriskToken);
+            emit(node.name);
+            emit(node.questionToken);
+            emitSignatureAndBody(node, emitSignatureHead);
+        }
+        function emitConstructor(node) {
+            emitModifiers(node, node.modifiers);
+            writeKeyword("constructor");
+            emitSignatureAndBody(node, emitSignatureHead);
+        }
+        function emitAccessorDeclaration(node) {
+            emitDecorators(node, node.decorators);
+            emitModifiers(node, node.modifiers);
+            writeKeyword(node.kind === 156 /* GetAccessor */ ? "get" : "set");
+            writeSpace();
+            emit(node.name);
+            emitSignatureAndBody(node, emitSignatureHead);
+        }
+        function emitCallSignature(node) {
+            pushNameGenerationScope(node);
+            emitDecorators(node, node.decorators);
+            emitModifiers(node, node.modifiers);
+            emitTypeParameters(node, node.typeParameters);
+            emitParameters(node, node.parameters);
+            emitTypeAnnotation(node.type);
+            writeSemicolon();
+            popNameGenerationScope(node);
+        }
+        function emitConstructSignature(node) {
+            pushNameGenerationScope(node);
+            emitDecorators(node, node.decorators);
+            emitModifiers(node, node.modifiers);
+            writeKeyword("new");
+            writeSpace();
+            emitTypeParameters(node, node.typeParameters);
+            emitParameters(node, node.parameters);
+            emitTypeAnnotation(node.type);
+            writeSemicolon();
+            popNameGenerationScope(node);
+        }
+        function emitIndexSignature(node) {
+            emitDecorators(node, node.decorators);
+            emitModifiers(node, node.modifiers);
+            emitParametersForIndexSignature(node, node.parameters);
+            emitTypeAnnotation(node.type);
+            writeSemicolon();
+        }
+        function emitSemicolonClassElement() {
+            writeSemicolon();
+        }
+        //
+        // Types
+        //
+        function emitTypePredicate(node) {
+            emit(node.parameterName);
+            writeSpace();
+            writeKeyword("is");
+            writeSpace();
+            emit(node.type);
+        }
+        function emitTypeReference(node) {
+            emit(node.typeName);
+            emitTypeArguments(node, node.typeArguments);
+        }
+        function emitFunctionType(node) {
+            pushNameGenerationScope(node);
+            emitTypeParameters(node, node.typeParameters);
+            emitParametersForArrow(node, node.parameters);
+            writeSpace();
+            writePunctuation("=>");
+            writeSpace();
+            emit(node.type);
+            popNameGenerationScope(node);
+        }
+        function emitJSDocFunctionType(node) {
+            write("function");
+            emitParameters(node, node.parameters);
+            write(":");
+            emit(node.type);
+        }
+        function emitJSDocNullableType(node) {
+            write("?");
+            emit(node.type);
+        }
+        function emitJSDocNonNullableType(node) {
+            write("!");
+            emit(node.type);
+        }
+        function emitJSDocOptionalType(node) {
+            emit(node.type);
+            write("=");
+        }
+        function emitConstructorType(node) {
+            pushNameGenerationScope(node);
+            writeKeyword("new");
+            writeSpace();
+            emitTypeParameters(node, node.typeParameters);
+            emitParameters(node, node.parameters);
+            writeSpace();
+            writePunctuation("=>");
+            writeSpace();
+            emit(node.type);
+            popNameGenerationScope(node);
+        }
+        function emitTypeQuery(node) {
+            writeKeyword("typeof");
+            writeSpace();
+            emit(node.exprName);
+        }
+        function emitTypeLiteral(node) {
+            writePunctuation("{");
+            var flags = ts.getEmitFlags(node) & 1 /* SingleLine */ ? 384 /* SingleLineTypeLiteralMembers */ : 16449 /* MultiLineTypeLiteralMembers */;
+            emitList(node, node.members, flags | 262144 /* NoSpaceIfEmpty */);
+            writePunctuation("}");
+        }
+        function emitArrayType(node) {
+            emit(node.elementType);
+            writePunctuation("[");
+            writePunctuation("]");
+        }
+        function emitJSDocVariadicType(node) {
+            write("...");
+            emit(node.type);
+        }
+        function emitTupleType(node) {
+            writePunctuation("[");
+            emitList(node, node.elementTypes, 272 /* TupleTypeElements */);
+            writePunctuation("]");
+        }
+        function emitUnionType(node) {
+            emitList(node, node.types, 260 /* UnionTypeConstituents */);
+        }
+        function emitIntersectionType(node) {
+            emitList(node, node.types, 264 /* IntersectionTypeConstituents */);
+        }
+        function emitConditionalType(node) {
+            emit(node.checkType);
+            writeSpace();
+            writeKeyword("extends");
+            writeSpace();
+            emit(node.extendsType);
+            writeSpace();
+            writePunctuation("?");
+            writeSpace();
+            emit(node.trueType);
+            writeSpace();
+            writePunctuation(":");
+            writeSpace();
+            emit(node.falseType);
+        }
+        function emitInferType(node) {
+            writeKeyword("infer");
+            writeSpace();
+            emit(node.typeParameter);
+        }
+        function emitParenthesizedType(node) {
+            writePunctuation("(");
+            emit(node.type);
+            writePunctuation(")");
+        }
+        function emitThisType() {
+            writeKeyword("this");
+        }
+        function emitTypeOperator(node) {
+            writeTokenText(node.operator, writeKeyword);
+            writeSpace();
+            emit(node.type);
+        }
+        function emitIndexedAccessType(node) {
+            emit(node.objectType);
+            writePunctuation("[");
+            emit(node.indexType);
+            writePunctuation("]");
+        }
+        function emitMappedType(node) {
+            var emitFlags = ts.getEmitFlags(node);
+            writePunctuation("{");
+            if (emitFlags & 1 /* SingleLine */) {
+                writeSpace();
+            }
+            else {
+                writeLine();
+                increaseIndent();
+            }
+            if (node.readonlyToken) {
+                emit(node.readonlyToken);
+                if (node.readonlyToken.kind !== 132 /* ReadonlyKeyword */) {
+                    writeKeyword("readonly");
+                }
+                writeSpace();
+            }
+            writePunctuation("[");
+            var pipelinePhase = getPipelinePhase(0 /* Notification */, 3 /* MappedTypeParameter */);
+            pipelinePhase(3 /* MappedTypeParameter */, node.typeParameter);
+            writePunctuation("]");
+            if (node.questionToken) {
+                emit(node.questionToken);
+                if (node.questionToken.kind !== 55 /* QuestionToken */) {
+                    writePunctuation("?");
+                }
+            }
+            writePunctuation(":");
+            writeSpace();
+            emit(node.type);
+            writeSemicolon();
+            if (emitFlags & 1 /* SingleLine */) {
+                writeSpace();
+            }
+            else {
+                writeLine();
+                decreaseIndent();
+            }
+            writePunctuation("}");
+        }
+        function emitLiteralType(node) {
+            emitExpression(node.literal);
+        }
+        function emitImportTypeNode(node) {
+            if (node.isTypeOf) {
+                writeKeyword("typeof");
+                writeSpace();
+            }
+            writeKeyword("import");
+            writePunctuation("(");
+            emit(node.argument);
+            writePunctuation(")");
+            if (node.qualifier) {
+                writePunctuation(".");
+                emit(node.qualifier);
+            }
+            emitTypeArguments(node, node.typeArguments);
+        }
+        //
+        // Binding patterns
+        //
+        function emitObjectBindingPattern(node) {
+            writePunctuation("{");
+            emitList(node, node.elements, 262576 /* ObjectBindingPatternElements */);
+            writePunctuation("}");
+        }
+        function emitArrayBindingPattern(node) {
+            writePunctuation("[");
+            emitList(node, node.elements, 262448 /* ArrayBindingPatternElements */);
+            writePunctuation("]");
+        }
+        function emitBindingElement(node) {
+            emit(node.dotDotDotToken);
+            if (node.propertyName) {
+                emit(node.propertyName);
+                writePunctuation(":");
+                writeSpace();
+            }
+            emit(node.name);
+            emitInitializer(node.initializer, node.name.end, node);
+        }
+        //
+        // Expressions
+        //
+        function emitArrayLiteralExpression(node) {
+            var elements = node.elements;
+            var preferNewLine = node.multiLine ? 32768 /* PreferNewLine */ : 0 /* None */;
+            emitExpressionList(node, elements, 4466 /* ArrayLiteralExpressionElements */ | preferNewLine);
+        }
+        function emitObjectLiteralExpression(node) {
+            ts.forEach(node.properties, generateMemberNames);
+            var indentedFlag = ts.getEmitFlags(node) & 65536 /* Indented */;
+            if (indentedFlag) {
+                increaseIndent();
+            }
+            var preferNewLine = node.multiLine ? 32768 /* PreferNewLine */ : 0 /* None */;
+            var allowTrailingComma = currentSourceFile.languageVersion >= 1 /* ES5 */ && !ts.isJsonSourceFile(currentSourceFile) ? 32 /* AllowTrailingComma */ : 0 /* None */;
+            emitList(node, node.properties, 263122 /* ObjectLiteralExpressionProperties */ | allowTrailingComma | preferNewLine);
+            if (indentedFlag) {
+                decreaseIndent();
+            }
+        }
+        function emitPropertyAccessExpression(node) {
+            var indentBeforeDot = false;
+            var indentAfterDot = false;
+            if (!(ts.getEmitFlags(node) & 131072 /* NoIndentation */)) {
+                var dotRangeStart = node.expression.end;
+                var dotRangeEnd = ts.skipTrivia(currentSourceFile.text, node.expression.end) + 1;
+                var dotToken = ts.createToken(23 /* DotToken */);
+                dotToken.pos = dotRangeStart;
+                dotToken.end = dotRangeEnd;
+                indentBeforeDot = needsIndentation(node, node.expression, dotToken);
+                indentAfterDot = needsIndentation(node, dotToken, node.name);
+            }
+            emitExpression(node.expression);
+            increaseIndentIf(indentBeforeDot);
+            var shouldEmitDotDot = !indentBeforeDot && needsDotDotForPropertyAccess(node.expression);
+            if (shouldEmitDotDot) {
+                writePunctuation(".");
+            }
+            emitTokenWithComment(23 /* DotToken */, node.expression.end, writePunctuation, node);
+            increaseIndentIf(indentAfterDot);
+            emit(node.name);
+            decreaseIndentIf(indentBeforeDot, indentAfterDot);
+        }
+        // 1..toString is a valid property access, emit a dot after the literal
+        // Also emit a dot if expression is a integer const enum value - it will appear in generated code as numeric literal
+        function needsDotDotForPropertyAccess(expression) {
+            expression = ts.skipPartiallyEmittedExpressions(expression);
+            if (ts.isNumericLiteral(expression)) {
+                // check if numeric literal is a decimal literal that was originally written with a dot
+                var text = getLiteralTextOfNode(expression);
+                return !expression.numericLiteralFlags
+                    && !ts.stringContains(text, ts.tokenToString(23 /* DotToken */));
+            }
+            else if (ts.isPropertyAccessExpression(expression) || ts.isElementAccessExpression(expression)) {
+                // check if constant enum value is integer
+                var constantValue = ts.getConstantValue(expression);
+                // isFinite handles cases when constantValue is undefined
+                return typeof constantValue === "number" && isFinite(constantValue)
+                    && Math.floor(constantValue) === constantValue
+                    && printerOptions.removeComments;
+            }
+        }
+        function emitElementAccessExpression(node) {
+            emitExpression(node.expression);
+            emitTokenWithComment(21 /* OpenBracketToken */, node.expression.end, writePunctuation, node);
+            emitExpression(node.argumentExpression);
+            emitTokenWithComment(22 /* CloseBracketToken */, node.argumentExpression.end, writePunctuation, node);
+        }
+        function emitCallExpression(node) {
+            emitExpression(node.expression);
+            emitTypeArguments(node, node.typeArguments);
+            emitExpressionList(node, node.arguments, 1296 /* CallExpressionArguments */);
+        }
+        function emitNewExpression(node) {
+            emitTokenWithComment(94 /* NewKeyword */, node.pos, writeKeyword, node);
+            writeSpace();
+            emitExpression(node.expression);
+            emitTypeArguments(node, node.typeArguments);
+            emitExpressionList(node, node.arguments, 9488 /* NewExpressionArguments */);
+        }
+        function emitTaggedTemplateExpression(node) {
+            emitExpression(node.tag);
+            emitTypeArguments(node, node.typeArguments);
+            writeSpace();
+            emitExpression(node.template);
+        }
+        function emitTypeAssertionExpression(node) {
+            writePunctuation("<");
+            emit(node.type);
+            writePunctuation(">");
+            emitExpression(node.expression);
+        }
+        function emitParenthesizedExpression(node) {
+            var openParenPos = emitTokenWithComment(19 /* OpenParenToken */, node.pos, writePunctuation, node);
+            emitExpression(node.expression);
+            emitTokenWithComment(20 /* CloseParenToken */, node.expression ? node.expression.end : openParenPos, writePunctuation, node);
+        }
+        function emitFunctionExpression(node) {
+            generateNameIfNeeded(node.name);
+            emitFunctionDeclarationOrExpression(node);
+        }
+        function emitArrowFunction(node) {
+            emitDecorators(node, node.decorators);
+            emitModifiers(node, node.modifiers);
+            emitSignatureAndBody(node, emitArrowFunctionHead);
+        }
+        function emitArrowFunctionHead(node) {
+            emitTypeParameters(node, node.typeParameters);
+            emitParametersForArrow(node, node.parameters);
+            emitTypeAnnotation(node.type);
+            writeSpace();
+            emit(node.equalsGreaterThanToken);
+        }
+        function emitDeleteExpression(node) {
+            emitTokenWithComment(80 /* DeleteKeyword */, node.pos, writeKeyword, node);
+            writeSpace();
+            emitExpression(node.expression);
+        }
+        function emitTypeOfExpression(node) {
+            emitTokenWithComment(103 /* TypeOfKeyword */, node.pos, writeKeyword, node);
+            writeSpace();
+            emitExpression(node.expression);
+        }
+        function emitVoidExpression(node) {
+            emitTokenWithComment(105 /* VoidKeyword */, node.pos, writeKeyword, node);
+            writeSpace();
+            emitExpression(node.expression);
+        }
+        function emitAwaitExpression(node) {
+            emitTokenWithComment(121 /* AwaitKeyword */, node.pos, writeKeyword, node);
+            writeSpace();
+            emitExpression(node.expression);
+        }
+        function emitPrefixUnaryExpression(node) {
+            writeTokenText(node.operator, writeOperator);
+            if (shouldEmitWhitespaceBeforeOperand(node)) {
+                writeSpace();
+            }
+            emitExpression(node.operand);
+        }
+        function shouldEmitWhitespaceBeforeOperand(node) {
+            // In some cases, we need to emit a space between the operator and the operand. One obvious case
+            // is when the operator is an identifier, like delete or typeof. We also need to do this for plus
+            // and minus expressions in certain cases. Specifically, consider the following two cases (parens
+            // are just for clarity of exposition, and not part of the source code):
+            //
+            //  (+(+1))
+            //  (+(++1))
+            //
+            // We need to emit a space in both cases. In the first case, the absence of a space will make
+            // the resulting expression a prefix increment operation. And in the second, it will make the resulting
+            // expression a prefix increment whose operand is a plus expression - (++(+x))
+            // The same is true of minus of course.
+            var operand = node.operand;
+            return operand.kind === 198 /* PrefixUnaryExpression */
+                && ((node.operator === 37 /* PlusToken */ && (operand.operator === 37 /* PlusToken */ || operand.operator === 43 /* PlusPlusToken */))
+                    || (node.operator === 38 /* MinusToken */ && (operand.operator === 38 /* MinusToken */ || operand.operator === 44 /* MinusMinusToken */)));
+        }
+        function emitPostfixUnaryExpression(node) {
+            emitExpression(node.operand);
+            writeTokenText(node.operator, writeOperator);
+        }
+        function emitBinaryExpression(node) {
+            var isCommaOperator = node.operatorToken.kind !== 26 /* CommaToken */;
+            var indentBeforeOperator = needsIndentation(node, node.left, node.operatorToken);
+            var indentAfterOperator = needsIndentation(node, node.operatorToken, node.right);
+            emitExpression(node.left);
+            increaseIndentIf(indentBeforeOperator, isCommaOperator ? " " : undefined);
+            emitLeadingCommentsOfPosition(node.operatorToken.pos);
+            writeTokenNode(node.operatorToken, writeOperator);
+            emitTrailingCommentsOfPosition(node.operatorToken.end, /*prefixSpace*/ true); // Binary operators should have a space before the comment starts
+            increaseIndentIf(indentAfterOperator, " ");
+            emitExpression(node.right);
+            decreaseIndentIf(indentBeforeOperator, indentAfterOperator);
+        }
+        function emitConditionalExpression(node) {
+            var indentBeforeQuestion = needsIndentation(node, node.condition, node.questionToken);
+            var indentAfterQuestion = needsIndentation(node, node.questionToken, node.whenTrue);
+            var indentBeforeColon = needsIndentation(node, node.whenTrue, node.colonToken);
+            var indentAfterColon = needsIndentation(node, node.colonToken, node.whenFalse);
+            emitExpression(node.condition);
+            increaseIndentIf(indentBeforeQuestion, " ");
+            emit(node.questionToken);
+            increaseIndentIf(indentAfterQuestion, " ");
+            emitExpression(node.whenTrue);
+            decreaseIndentIf(indentBeforeQuestion, indentAfterQuestion);
+            increaseIndentIf(indentBeforeColon, " ");
+            emit(node.colonToken);
+            increaseIndentIf(indentAfterColon, " ");
+            emitExpression(node.whenFalse);
+            decreaseIndentIf(indentBeforeColon, indentAfterColon);
+        }
+        function emitTemplateExpression(node) {
+            emit(node.head);
+            emitList(node, node.templateSpans, 131072 /* TemplateExpressionSpans */);
+        }
+        function emitYieldExpression(node) {
+            emitTokenWithComment(116 /* YieldKeyword */, node.pos, writeKeyword, node);
+            emit(node.asteriskToken);
+            emitExpressionWithLeadingSpace(node.expression);
+        }
+        function emitSpreadExpression(node) {
+            writePunctuation("...");
+            emitExpression(node.expression);
+        }
+        function emitClassExpression(node) {
+            generateNameIfNeeded(node.name);
+            emitClassDeclarationOrExpression(node);
+        }
+        function emitExpressionWithTypeArguments(node) {
+            emitExpression(node.expression);
+            emitTypeArguments(node, node.typeArguments);
+        }
+        function emitAsExpression(node) {
+            emitExpression(node.expression);
+            if (node.type) {
+                writeSpace();
+                writeKeyword("as");
+                writeSpace();
+                emit(node.type);
+            }
+        }
+        function emitNonNullExpression(node) {
+            emitExpression(node.expression);
+            writeOperator("!");
+        }
+        function emitMetaProperty(node) {
+            writeToken(node.keywordToken, node.pos, writePunctuation);
+            writePunctuation(".");
+            emit(node.name);
+        }
+        //
+        // Misc
+        //
+        function emitTemplateSpan(node) {
+            emitExpression(node.expression);
+            emit(node.literal);
+        }
+        //
+        // Statements
+        //
+        function emitBlock(node) {
+            emitBlockStatements(node, /*forceSingleLine*/ !node.multiLine && isEmptyBlock(node));
+        }
+        function emitBlockStatements(node, forceSingleLine) {
+            emitTokenWithComment(17 /* OpenBraceToken */, node.pos, writePunctuation, /*contextNode*/ node);
+            var format = forceSingleLine || ts.getEmitFlags(node) & 1 /* SingleLine */ ? 384 /* SingleLineBlockStatements */ : 65 /* MultiLineBlockStatements */;
+            emitList(node, node.statements, format);
+            emitTokenWithComment(18 /* CloseBraceToken */, node.statements.end, writePunctuation, /*contextNode*/ node, /*indentLeading*/ !!(format & 1 /* MultiLine */));
+        }
+        function emitVariableStatement(node) {
+            emitModifiers(node, node.modifiers);
+            emit(node.declarationList);
+            writeSemicolon();
+        }
+        function emitEmptyStatement() {
+            writeSemicolon();
+        }
+        function emitExpressionStatement(node) {
+            emitExpression(node.expression);
+            if (!ts.isJsonSourceFile(currentSourceFile)) {
+                writeSemicolon();
+            }
+        }
+        function emitIfStatement(node) {
+            var openParenPos = emitTokenWithComment(90 /* IfKeyword */, node.pos, writeKeyword, node);
+            writeSpace();
+            emitTokenWithComment(19 /* OpenParenToken */, openParenPos, writePunctuation, node);
+            emitExpression(node.expression);
+            emitTokenWithComment(20 /* CloseParenToken */, node.expression.end, writePunctuation, node);
+            emitEmbeddedStatement(node, node.thenStatement);
+            if (node.elseStatement) {
+                writeLineOrSpace(node);
+                emitTokenWithComment(82 /* ElseKeyword */, node.thenStatement.end, writeKeyword, node);
+                if (node.elseStatement.kind === 217 /* IfStatement */) {
+                    writeSpace();
+                    emit(node.elseStatement);
+                }
+                else {
+                    emitEmbeddedStatement(node, node.elseStatement);
+                }
+            }
+        }
+        function emitWhileClause(node, startPos) {
+            var openParenPos = emitTokenWithComment(106 /* WhileKeyword */, startPos, writeKeyword, node);
+            writeSpace();
+            emitTokenWithComment(19 /* OpenParenToken */, openParenPos, writePunctuation, node);
+            emitExpression(node.expression);
+            emitTokenWithComment(20 /* CloseParenToken */, node.expression.end, writePunctuation, node);
+        }
+        function emitDoStatement(node) {
+            emitTokenWithComment(81 /* DoKeyword */, node.pos, writeKeyword, node);
+            emitEmbeddedStatement(node, node.statement);
+            if (ts.isBlock(node.statement)) {
+                writeSpace();
+            }
+            else {
+                writeLineOrSpace(node);
+            }
+            emitWhileClause(node, node.statement.end);
+            writePunctuation(";");
+        }
+        function emitWhileStatement(node) {
+            emitWhileClause(node, node.pos);
+            emitEmbeddedStatement(node, node.statement);
+        }
+        function emitForStatement(node) {
+            var openParenPos = emitTokenWithComment(88 /* ForKeyword */, node.pos, writeKeyword, node);
+            writeSpace();
+            var pos = emitTokenWithComment(19 /* OpenParenToken */, openParenPos, writePunctuation, /*contextNode*/ node);
+            emitForBinding(node.initializer);
+            pos = emitTokenWithComment(25 /* SemicolonToken */, node.initializer ? node.initializer.end : pos, writeSemicolon, node);
+            emitExpressionWithLeadingSpace(node.condition);
+            pos = emitTokenWithComment(25 /* SemicolonToken */, node.condition ? node.condition.end : pos, writeSemicolon, node);
+            emitExpressionWithLeadingSpace(node.incrementor);
+            emitTokenWithComment(20 /* CloseParenToken */, node.incrementor ? node.incrementor.end : pos, writePunctuation, node);
+            emitEmbeddedStatement(node, node.statement);
+        }
+        function emitForInStatement(node) {
+            var openParenPos = emitTokenWithComment(88 /* ForKeyword */, node.pos, writeKeyword, node);
+            writeSpace();
+            emitTokenWithComment(19 /* OpenParenToken */, openParenPos, writePunctuation, node);
+            emitForBinding(node.initializer);
+            writeSpace();
+            emitTokenWithComment(92 /* InKeyword */, node.initializer.end, writeKeyword, node);
+            writeSpace();
+            emitExpression(node.expression);
+            emitTokenWithComment(20 /* CloseParenToken */, node.expression.end, writePunctuation, node);
+            emitEmbeddedStatement(node, node.statement);
+        }
+        function emitForOfStatement(node) {
+            var openParenPos = emitTokenWithComment(88 /* ForKeyword */, node.pos, writeKeyword, node);
+            writeSpace();
+            emitWithTrailingSpace(node.awaitModifier);
+            emitTokenWithComment(19 /* OpenParenToken */, openParenPos, writePunctuation, node);
+            emitForBinding(node.initializer);
+            writeSpace();
+            emitTokenWithComment(145 /* OfKeyword */, node.initializer.end, writeKeyword, node);
+            writeSpace();
+            emitExpression(node.expression);
+            emitTokenWithComment(20 /* CloseParenToken */, node.expression.end, writePunctuation, node);
+            emitEmbeddedStatement(node, node.statement);
+        }
+        function emitForBinding(node) {
+            if (node !== undefined) {
+                if (node.kind === 233 /* VariableDeclarationList */) {
+                    emit(node);
+                }
+                else {
+                    emitExpression(node);
+                }
+            }
+        }
+        function emitContinueStatement(node) {
+            emitTokenWithComment(77 /* ContinueKeyword */, node.pos, writeKeyword, node);
+            emitWithLeadingSpace(node.label);
+            writeSemicolon();
+        }
+        function emitBreakStatement(node) {
+            emitTokenWithComment(72 /* BreakKeyword */, node.pos, writeKeyword, node);
+            emitWithLeadingSpace(node.label);
+            writeSemicolon();
+        }
+        function emitTokenWithComment(token, pos, writer, contextNode, indentLeading) {
+            var node = ts.getParseTreeNode(contextNode);
+            var isSimilarNode = node && node.kind === contextNode.kind;
+            var startPos = pos;
+            if (isSimilarNode) {
+                pos = ts.skipTrivia(currentSourceFile.text, pos);
+            }
+            if (emitLeadingCommentsOfPosition && isSimilarNode && contextNode.pos !== startPos) {
+                var needsIndent = indentLeading && !ts.positionsAreOnSameLine(startPos, pos, currentSourceFile);
+                if (needsIndent) {
+                    increaseIndent();
+                }
+                emitLeadingCommentsOfPosition(startPos);
+                if (needsIndent) {
+                    decreaseIndent();
+                }
+            }
+            pos = writeTokenText(token, writer, pos);
+            if (emitTrailingCommentsOfPosition && isSimilarNode && contextNode.end !== pos) {
+                emitTrailingCommentsOfPosition(pos, /*prefixSpace*/ true);
+            }
+            return pos;
+        }
+        function emitReturnStatement(node) {
+            emitTokenWithComment(96 /* ReturnKeyword */, node.pos, writeKeyword, /*contextNode*/ node);
+            emitExpressionWithLeadingSpace(node.expression);
+            writeSemicolon();
+        }
+        function emitWithStatement(node) {
+            var openParenPos = emitTokenWithComment(107 /* WithKeyword */, node.pos, writeKeyword, node);
+            writeSpace();
+            emitTokenWithComment(19 /* OpenParenToken */, openParenPos, writePunctuation, node);
+            emitExpression(node.expression);
+            emitTokenWithComment(20 /* CloseParenToken */, node.expression.end, writePunctuation, node);
+            emitEmbeddedStatement(node, node.statement);
+        }
+        function emitSwitchStatement(node) {
+            var openParenPos = emitTokenWithComment(98 /* SwitchKeyword */, node.pos, writeKeyword, node);
+            writeSpace();
+            emitTokenWithComment(19 /* OpenParenToken */, openParenPos, writePunctuation, node);
+            emitExpression(node.expression);
+            emitTokenWithComment(20 /* CloseParenToken */, node.expression.end, writePunctuation, node);
+            writeSpace();
+            emit(node.caseBlock);
+        }
+        function emitLabeledStatement(node) {
+            emit(node.label);
+            emitTokenWithComment(56 /* ColonToken */, node.label.end, writePunctuation, node);
+            writeSpace();
+            emit(node.statement);
+        }
+        function emitThrowStatement(node) {
+            emitTokenWithComment(100 /* ThrowKeyword */, node.pos, writeKeyword, node);
+            emitExpressionWithLeadingSpace(node.expression);
+            writeSemicolon();
+        }
+        function emitTryStatement(node) {
+            emitTokenWithComment(102 /* TryKeyword */, node.pos, writeKeyword, node);
+            writeSpace();
+            emit(node.tryBlock);
+            if (node.catchClause) {
+                writeLineOrSpace(node);
+                emit(node.catchClause);
+            }
+            if (node.finallyBlock) {
+                writeLineOrSpace(node);
+                emitTokenWithComment(87 /* FinallyKeyword */, (node.catchClause || node.tryBlock).end, writeKeyword, node);
+                writeSpace();
+                emit(node.finallyBlock);
+            }
+        }
+        function emitDebuggerStatement(node) {
+            writeToken(78 /* DebuggerKeyword */, node.pos, writeKeyword);
+            writeSemicolon();
+        }
+        //
+        // Declarations
+        //
+        function emitVariableDeclaration(node) {
+            emit(node.name);
+            emitTypeAnnotation(node.type);
+            emitInitializer(node.initializer, node.type ? node.type.end : node.name.end, node);
+        }
+        function emitVariableDeclarationList(node) {
+            writeKeyword(ts.isLet(node) ? "let" : ts.isConst(node) ? "const" : "var");
+            writeSpace();
+            emitList(node, node.declarations, 272 /* VariableDeclarationList */);
+        }
+        function emitFunctionDeclaration(node) {
+            emitFunctionDeclarationOrExpression(node);
+        }
+        function emitFunctionDeclarationOrExpression(node) {
+            emitDecorators(node, node.decorators);
+            emitModifiers(node, node.modifiers);
+            writeKeyword("function");
+            emit(node.asteriskToken);
+            writeSpace();
+            emitIdentifierName(node.name); // TODO: GH#18217
+            emitSignatureAndBody(node, emitSignatureHead);
+        }
+        function emitBlockCallback(_hint, body) {
+            emitBlockFunctionBody(body);
+        }
+        function emitSignatureAndBody(node, emitSignatureHead) {
+            var body = node.body;
+            if (body) {
+                if (ts.isBlock(body)) {
+                    var indentedFlag = ts.getEmitFlags(node) & 65536 /* Indented */;
+                    if (indentedFlag) {
+                        increaseIndent();
+                    }
+                    pushNameGenerationScope(node);
+                    ts.forEach(node.parameters, generateNames);
+                    generateNames(node.body);
+                    emitSignatureHead(node);
+                    if (onEmitNode) {
+                        onEmitNode(4 /* Unspecified */, body, emitBlockCallback);
+                    }
+                    else {
+                        emitBlockFunctionBody(body);
+                    }
+                    popNameGenerationScope(node);
+                    if (indentedFlag) {
+                        decreaseIndent();
+                    }
+                }
+                else {
+                    emitSignatureHead(node);
+                    writeSpace();
+                    emitExpression(body);
+                }
+            }
+            else {
+                emitSignatureHead(node);
+                writeSemicolon();
+            }
+        }
+        function emitSignatureHead(node) {
+            emitTypeParameters(node, node.typeParameters);
+            emitParameters(node, node.parameters);
+            emitTypeAnnotation(node.type);
+        }
+        function shouldEmitBlockFunctionBodyOnSingleLine(body) {
+            // We must emit a function body as a single-line body in the following case:
+            // * The body has NodeEmitFlags.SingleLine specified.
+            // We must emit a function body as a multi-line body in the following cases:
+            // * The body is explicitly marked as multi-line.
+            // * A non-synthesized body's start and end position are on different lines.
+            // * Any statement in the body starts on a new line.
+            if (ts.getEmitFlags(body) & 1 /* SingleLine */) {
+                return true;
+            }
+            if (body.multiLine) {
+                return false;
+            }
+            if (!ts.nodeIsSynthesized(body) && !ts.rangeIsOnSingleLine(body, currentSourceFile)) {
+                return false;
+            }
+            if (shouldWriteLeadingLineTerminator(body, body.statements, 2 /* PreserveLines */)
+                || shouldWriteClosingLineTerminator(body, body.statements, 2 /* PreserveLines */)) {
+                return false;
+            }
+            var previousStatement;
+            for (var _a = 0, _b = body.statements; _a < _b.length; _a++) {
+                var statement = _b[_a];
+                if (shouldWriteSeparatingLineTerminator(previousStatement, statement, 2 /* PreserveLines */)) {
+                    return false;
+                }
+                previousStatement = statement;
+            }
+            return true;
+        }
+        function emitBlockFunctionBody(body) {
+            writeSpace();
+            writePunctuation("{");
+            increaseIndent();
+            var emitBlockFunctionBody = shouldEmitBlockFunctionBodyOnSingleLine(body)
+                ? emitBlockFunctionBodyOnSingleLine
+                : emitBlockFunctionBodyWorker;
+            if (emitBodyWithDetachedComments) {
+                emitBodyWithDetachedComments(body, body.statements, emitBlockFunctionBody);
+            }
+            else {
+                emitBlockFunctionBody(body);
+            }
+            decreaseIndent();
+            writeToken(18 /* CloseBraceToken */, body.statements.end, writePunctuation, body);
+        }
+        function emitBlockFunctionBodyOnSingleLine(body) {
+            emitBlockFunctionBodyWorker(body, /*emitBlockFunctionBodyOnSingleLine*/ true);
+        }
+        function emitBlockFunctionBodyWorker(body, emitBlockFunctionBodyOnSingleLine) {
+            // Emit all the prologue directives (like "use strict").
+            var statementOffset = emitPrologueDirectives(body.statements, /*startWithNewLine*/ true);
+            var pos = writer.getTextPos();
+            emitHelpers(body);
+            if (statementOffset === 0 && pos === writer.getTextPos() && emitBlockFunctionBodyOnSingleLine) {
+                decreaseIndent();
+                emitList(body, body.statements, 384 /* SingleLineFunctionBodyStatements */);
+                increaseIndent();
+            }
+            else {
+                emitList(body, body.statements, 1 /* MultiLineFunctionBodyStatements */, statementOffset);
+            }
+        }
+        function emitClassDeclaration(node) {
+            emitClassDeclarationOrExpression(node);
+        }
+        function emitClassDeclarationOrExpression(node) {
+            ts.forEach(node.members, generateMemberNames);
+            emitDecorators(node, node.decorators);
+            emitModifiers(node, node.modifiers);
+            writeKeyword("class");
+            if (node.name) {
+                writeSpace();
+                emitIdentifierName(node.name);
+            }
+            var indentedFlag = ts.getEmitFlags(node) & 65536 /* Indented */;
+            if (indentedFlag) {
+                increaseIndent();
+            }
+            emitTypeParameters(node, node.typeParameters);
+            emitList(node, node.heritageClauses, 0 /* ClassHeritageClauses */);
+            writeSpace();
+            writePunctuation("{");
+            emitList(node, node.members, 65 /* ClassMembers */);
+            writePunctuation("}");
+            if (indentedFlag) {
+                decreaseIndent();
+            }
+        }
+        function emitInterfaceDeclaration(node) {
+            emitDecorators(node, node.decorators);
+            emitModifiers(node, node.modifiers);
+            writeKeyword("interface");
+            writeSpace();
+            emit(node.name);
+            emitTypeParameters(node, node.typeParameters);
+            emitList(node, node.heritageClauses, 256 /* HeritageClauses */);
+            writeSpace();
+            writePunctuation("{");
+            emitList(node, node.members, 65 /* InterfaceMembers */);
+            writePunctuation("}");
+        }
+        function emitTypeAliasDeclaration(node) {
+            emitDecorators(node, node.decorators);
+            emitModifiers(node, node.modifiers);
+            writeKeyword("type");
+            writeSpace();
+            emit(node.name);
+            emitTypeParameters(node, node.typeParameters);
+            writeSpace();
+            writePunctuation("=");
+            writeSpace();
+            emit(node.type);
+            writeSemicolon();
+        }
+        function emitEnumDeclaration(node) {
+            emitModifiers(node, node.modifiers);
+            writeKeyword("enum");
+            writeSpace();
+            emit(node.name);
+            writeSpace();
+            writePunctuation("{");
+            emitList(node, node.members, 81 /* EnumMembers */);
+            writePunctuation("}");
+        }
+        function emitModuleDeclaration(node) {
+            emitModifiers(node, node.modifiers);
+            if (~node.flags & 512 /* GlobalAugmentation */) {
+                writeKeyword(node.flags & 16 /* Namespace */ ? "namespace" : "module");
+                writeSpace();
+            }
+            emit(node.name);
+            var body = node.body;
+            if (!body)
+                return writeSemicolon();
+            while (body.kind === 239 /* ModuleDeclaration */) {
+                writePunctuation(".");
+                emit(body.name);
+                body = body.body;
+            }
+            writeSpace();
+            emit(body);
+        }
+        function emitModuleBlock(node) {
+            pushNameGenerationScope(node);
+            ts.forEach(node.statements, generateNames);
+            emitBlockStatements(node, /*forceSingleLine*/ isEmptyBlock(node));
+            popNameGenerationScope(node);
+        }
+        function emitCaseBlock(node) {
+            emitTokenWithComment(17 /* OpenBraceToken */, node.pos, writePunctuation, node);
+            emitList(node, node.clauses, 65 /* CaseBlockClauses */);
+            emitTokenWithComment(18 /* CloseBraceToken */, node.clauses.end, writePunctuation, node, /*indentLeading*/ true);
+        }
+        function emitImportEqualsDeclaration(node) {
+            emitModifiers(node, node.modifiers);
+            emitTokenWithComment(91 /* ImportKeyword */, node.modifiers ? node.modifiers.end : node.pos, writeKeyword, node);
+            writeSpace();
+            emit(node.name);
+            writeSpace();
+            emitTokenWithComment(58 /* EqualsToken */, node.name.end, writePunctuation, node);
+            writeSpace();
+            emitModuleReference(node.moduleReference);
+            writeSemicolon();
+        }
+        function emitModuleReference(node) {
+            if (node.kind === 71 /* Identifier */) {
+                emitExpression(node);
+            }
+            else {
+                emit(node);
+            }
+        }
+        function emitImportDeclaration(node) {
+            emitModifiers(node, node.modifiers);
+            emitTokenWithComment(91 /* ImportKeyword */, node.modifiers ? node.modifiers.end : node.pos, writeKeyword, node);
+            writeSpace();
+            if (node.importClause) {
+                emit(node.importClause);
+                writeSpace();
+                emitTokenWithComment(143 /* FromKeyword */, node.importClause.end, writeKeyword, node);
+                writeSpace();
+            }
+            emitExpression(node.moduleSpecifier);
+            writeSemicolon();
+        }
+        function emitImportClause(node) {
+            emit(node.name);
+            if (node.name && node.namedBindings) {
+                emitTokenWithComment(26 /* CommaToken */, node.name.end, writePunctuation, node);
+                writeSpace();
+            }
+            emit(node.namedBindings);
+        }
+        function emitNamespaceImport(node) {
+            var asPos = emitTokenWithComment(39 /* AsteriskToken */, node.pos, writePunctuation, node);
+            writeSpace();
+            emitTokenWithComment(118 /* AsKeyword */, asPos, writeKeyword, node);
+            writeSpace();
+            emit(node.name);
+        }
+        function emitNamedImports(node) {
+            emitNamedImportsOrExports(node);
+        }
+        function emitImportSpecifier(node) {
+            emitImportOrExportSpecifier(node);
+        }
+        function emitExportAssignment(node) {
+            var nextPos = emitTokenWithComment(84 /* ExportKeyword */, node.pos, writeKeyword, node);
+            writeSpace();
+            if (node.isExportEquals) {
+                emitTokenWithComment(58 /* EqualsToken */, nextPos, writeOperator, node);
+            }
+            else {
+                emitTokenWithComment(79 /* DefaultKeyword */, nextPos, writeKeyword, node);
+            }
+            writeSpace();
+            emitExpression(node.expression);
+            writeSemicolon();
+        }
+        function emitExportDeclaration(node) {
+            var nextPos = emitTokenWithComment(84 /* ExportKeyword */, node.pos, writeKeyword, node);
+            writeSpace();
+            if (node.exportClause) {
+                emit(node.exportClause);
+            }
+            else {
+                nextPos = emitTokenWithComment(39 /* AsteriskToken */, nextPos, writePunctuation, node);
+            }
+            if (node.moduleSpecifier) {
+                writeSpace();
+                var fromPos = node.exportClause ? node.exportClause.end : nextPos;
+                emitTokenWithComment(143 /* FromKeyword */, fromPos, writeKeyword, node);
+                writeSpace();
+                emitExpression(node.moduleSpecifier);
+            }
+            writeSemicolon();
+        }
+        function emitNamespaceExportDeclaration(node) {
+            var nextPos = emitTokenWithComment(84 /* ExportKeyword */, node.pos, writeKeyword, node);
+            writeSpace();
+            nextPos = emitTokenWithComment(118 /* AsKeyword */, nextPos, writeKeyword, node);
+            writeSpace();
+            nextPos = emitTokenWithComment(130 /* NamespaceKeyword */, nextPos, writeKeyword, node);
+            writeSpace();
+            emit(node.name);
+            writeSemicolon();
+        }
+        function emitNamedExports(node) {
+            emitNamedImportsOrExports(node);
+        }
+        function emitExportSpecifier(node) {
+            emitImportOrExportSpecifier(node);
+        }
+        function emitNamedImportsOrExports(node) {
+            writePunctuation("{");
+            emitList(node, node.elements, 262576 /* NamedImportsOrExportsElements */);
+            writePunctuation("}");
+        }
+        function emitImportOrExportSpecifier(node) {
+            if (node.propertyName) {
+                emit(node.propertyName);
+                writeSpace();
+                emitTokenWithComment(118 /* AsKeyword */, node.propertyName.end, writeKeyword, node);
+                writeSpace();
+            }
+            emit(node.name);
+        }
+        //
+        // Module references
+        //
+        function emitExternalModuleReference(node) {
+            writeKeyword("require");
+            writePunctuation("(");
+            emitExpression(node.expression);
+            writePunctuation(")");
+        }
+        //
+        // JSX
+        //
+        function emitJsxElement(node) {
+            emit(node.openingElement);
+            emitList(node, node.children, 131072 /* JsxElementOrFragmentChildren */);
+            emit(node.closingElement);
+        }
+        function emitJsxSelfClosingElement(node) {
+            writePunctuation("<");
+            emitJsxTagName(node.tagName);
+            writeSpace();
+            emit(node.attributes);
+            writePunctuation("/>");
+        }
+        function emitJsxFragment(node) {
+            emit(node.openingFragment);
+            emitList(node, node.children, 131072 /* JsxElementOrFragmentChildren */);
+            emit(node.closingFragment);
+        }
+        function emitJsxOpeningElementOrFragment(node) {
+            writePunctuation("<");
+            if (ts.isJsxOpeningElement(node)) {
+                emitJsxTagName(node.tagName);
+                if (node.attributes.properties && node.attributes.properties.length > 0) {
+                    writeSpace();
+                }
+                emit(node.attributes);
+            }
+            writePunctuation(">");
+        }
+        function emitJsxText(node) {
+            commitPendingSemicolon();
+            writer.writeLiteral(getTextOfNode(node, /*includeTrivia*/ true));
+        }
+        function emitJsxClosingElementOrFragment(node) {
+            writePunctuation("</");
+            if (ts.isJsxClosingElement(node)) {
+                emitJsxTagName(node.tagName);
+            }
+            writePunctuation(">");
+        }
+        function emitJsxAttributes(node) {
+            emitList(node, node.properties, 131328 /* JsxElementAttributes */);
+        }
+        function emitJsxAttribute(node) {
+            emit(node.name);
+            emitNodeWithPrefix("=", writePunctuation, node.initializer, emit); // TODO: GH#18217
+        }
+        function emitJsxSpreadAttribute(node) {
+            writePunctuation("{...");
+            emitExpression(node.expression);
+            writePunctuation("}");
+        }
+        function emitJsxExpression(node) {
+            if (node.expression) {
+                writePunctuation("{");
+                emit(node.dotDotDotToken);
+                emitExpression(node.expression);
+                writePunctuation("}");
+            }
+        }
+        function emitJsxTagName(node) {
+            if (node.kind === 71 /* Identifier */) {
+                emitExpression(node);
+            }
+            else {
+                emit(node);
+            }
+        }
+        //
+        // Clauses
+        //
+        function emitCaseClause(node) {
+            emitTokenWithComment(73 /* CaseKeyword */, node.pos, writeKeyword, node);
+            writeSpace();
+            emitExpression(node.expression);
+            emitCaseOrDefaultClauseRest(node, node.statements, node.expression.end);
+        }
+        function emitDefaultClause(node) {
+            var pos = emitTokenWithComment(79 /* DefaultKeyword */, node.pos, writeKeyword, node);
+            emitCaseOrDefaultClauseRest(node, node.statements, pos);
+        }
+        function emitCaseOrDefaultClauseRest(parentNode, statements, colonPos) {
+            var emitAsSingleStatement = statements.length === 1 &&
+                (
+                // treat synthesized nodes as located on the same line for emit purposes
+                ts.nodeIsSynthesized(parentNode) ||
+                    ts.nodeIsSynthesized(statements[0]) ||
+                    ts.rangeStartPositionsAreOnSameLine(parentNode, statements[0], currentSourceFile));
+            var format = 81985 /* CaseOrDefaultClauseStatements */;
+            if (emitAsSingleStatement) {
+                writeToken(56 /* ColonToken */, colonPos, writePunctuation, parentNode);
+                writeSpace();
+                format &= ~(1 /* MultiLine */ | 64 /* Indented */);
+            }
+            else {
+                emitTokenWithComment(56 /* ColonToken */, colonPos, writePunctuation, parentNode);
+            }
+            emitList(parentNode, statements, format);
+        }
+        function emitHeritageClause(node) {
+            writeSpace();
+            writeTokenText(node.token, writeKeyword);
+            writeSpace();
+            emitList(node, node.types, 272 /* HeritageClauseTypes */);
+        }
+        function emitCatchClause(node) {
+            var openParenPos = emitTokenWithComment(74 /* CatchKeyword */, node.pos, writeKeyword, node);
+            writeSpace();
+            if (node.variableDeclaration) {
+                emitTokenWithComment(19 /* OpenParenToken */, openParenPos, writePunctuation, node);
+                emit(node.variableDeclaration);
+                emitTokenWithComment(20 /* CloseParenToken */, node.variableDeclaration.end, writePunctuation, node);
+                writeSpace();
+            }
+            emit(node.block);
+        }
+        //
+        // Property assignments
+        //
+        function emitPropertyAssignment(node) {
+            emit(node.name);
+            writePunctuation(":");
+            writeSpace();
+            // This is to ensure that we emit comment in the following case:
+            //      For example:
+            //          obj = {
+            //              id: /*comment1*/ ()=>void
+            //          }
+            // "comment1" is not considered to be leading comment for node.initializer
+            // but rather a trailing comment on the previous node.
+            var initializer = node.initializer;
+            if (emitTrailingCommentsOfPosition && (ts.getEmitFlags(initializer) & 512 /* NoLeadingComments */) === 0) {
+                var commentRange = ts.getCommentRange(initializer);
+                emitTrailingCommentsOfPosition(commentRange.pos);
+            }
+            emitExpression(initializer);
+        }
+        function emitShorthandPropertyAssignment(node) {
+            emit(node.name);
+            if (node.objectAssignmentInitializer) {
+                writeSpace();
+                writePunctuation("=");
+                writeSpace();
+                emitExpression(node.objectAssignmentInitializer);
+            }
+        }
+        function emitSpreadAssignment(node) {
+            if (node.expression) {
+                writePunctuation("...");
+                emitExpression(node.expression);
+            }
+        }
+        //
+        // Enum
+        //
+        function emitEnumMember(node) {
+            emit(node.name);
+            emitInitializer(node.initializer, node.name.end, node);
+        }
+        //
+        // Top-level nodes
+        //
+        function emitSourceFile(node) {
+            writeLine();
+            var statements = node.statements;
+            if (emitBodyWithDetachedComments) {
+                // Emit detached comment if there are no prologue directives or if the first node is synthesized.
+                // The synthesized node will have no leading comment so some comments may be missed.
+                var shouldEmitDetachedComment = statements.length === 0 ||
+                    !ts.isPrologueDirective(statements[0]) ||
+                    ts.nodeIsSynthesized(statements[0]);
+                if (shouldEmitDetachedComment) {
+                    emitBodyWithDetachedComments(node, statements, emitSourceFileWorker);
+                    return;
+                }
+            }
+            emitSourceFileWorker(node);
+        }
+        function emitSyntheticTripleSlashReferencesIfNeeded(node) {
+            emitTripleSlashDirectives(!!node.hasNoDefaultLib, node.syntheticFileReferences || [], node.syntheticTypeReferences || []);
+        }
+        function emitTripleSlashDirectivesIfNeeded(node) {
+            if (node.isDeclarationFile)
+                emitTripleSlashDirectives(node.hasNoDefaultLib, node.referencedFiles, node.typeReferenceDirectives);
+        }
+        function emitTripleSlashDirectives(hasNoDefaultLib, files, types) {
+            if (hasNoDefaultLib) {
+                write("/// <reference no-default-lib=\"true\"/>");
+                writeLine();
+            }
+            if (currentSourceFile && currentSourceFile.moduleName) {
+                write("/// <amd-module name=\"" + currentSourceFile.moduleName + "\" />");
+                writeLine();
+            }
+            if (currentSourceFile && currentSourceFile.amdDependencies) {
+                for (var _a = 0, _b = currentSourceFile.amdDependencies; _a < _b.length; _a++) {
+                    var dep = _b[_a];
+                    if (dep.name) {
+                        write("/// <amd-dependency name=\"" + dep.name + "\" path=\"" + dep.path + "\" />");
+                    }
+                    else {
+                        write("/// <amd-dependency path=\"" + dep.path + "\" />");
+                    }
+                    writeLine();
+                }
+            }
+            for (var _c = 0, files_1 = files; _c < files_1.length; _c++) {
+                var directive = files_1[_c];
+                write("/// <reference path=\"" + directive.fileName + "\" />");
+                writeLine();
+            }
+            for (var _d = 0, types_17 = types; _d < types_17.length; _d++) {
+                var directive = types_17[_d];
+                write("/// <reference types=\"" + directive.fileName + "\" />");
+                writeLine();
+            }
+        }
+        function emitSourceFileWorker(node) {
+            var statements = node.statements;
+            pushNameGenerationScope(node);
+            ts.forEach(node.statements, generateNames);
+            emitHelpers(node);
+            var index = ts.findIndex(statements, function (statement) { return !ts.isPrologueDirective(statement); });
+            emitTripleSlashDirectivesIfNeeded(node);
+            emitList(node, statements, 1 /* MultiLine */, index === -1 ? statements.length : index);
+            popNameGenerationScope(node);
+        }
+        // Transformation nodes
+        function emitPartiallyEmittedExpression(node) {
+            emitExpression(node.expression);
+        }
+        function emitCommaList(node) {
+            emitExpressionList(node, node.elements, 272 /* CommaListElements */);
+        }
+        /**
+         * Emits any prologue directives at the start of a Statement list, returning the
+         * number of prologue directives written to the output.
+         */
+        function emitPrologueDirectives(statements, startWithNewLine, seenPrologueDirectives) {
+            for (var i = 0; i < statements.length; i++) {
+                var statement = statements[i];
+                if (ts.isPrologueDirective(statement)) {
+                    var shouldEmitPrologueDirective = seenPrologueDirectives ? !seenPrologueDirectives.has(statement.expression.text) : true;
+                    if (shouldEmitPrologueDirective) {
+                        if (startWithNewLine || i > 0) {
+                            writeLine();
+                        }
+                        emit(statement);
+                        if (seenPrologueDirectives) {
+                            seenPrologueDirectives.set(statement.expression.text, true);
+                        }
+                    }
+                }
+                else {
+                    // return index of the first non prologue directive
+                    return i;
+                }
+            }
+            return statements.length;
+        }
+        function emitPrologueDirectivesIfNeeded(sourceFileOrBundle) {
+            if (ts.isSourceFile(sourceFileOrBundle)) {
+                setSourceFile(sourceFileOrBundle);
+                emitPrologueDirectives(sourceFileOrBundle.statements);
+            }
+            else {
+                var seenPrologueDirectives = ts.createMap();
+                for (var _a = 0, _b = sourceFileOrBundle.sourceFiles; _a < _b.length; _a++) {
+                    var sourceFile = _b[_a];
+                    setSourceFile(sourceFile);
+                    emitPrologueDirectives(sourceFile.statements, /*startWithNewLine*/ true, seenPrologueDirectives);
+                }
+            }
+        }
+        function emitShebangIfNeeded(sourceFileOrBundle) {
+            if (ts.isSourceFile(sourceFileOrBundle)) {
+                var shebang = ts.getShebang(sourceFileOrBundle.text);
+                if (shebang) {
+                    write(shebang);
+                    writeLine();
+                    return true;
+                }
+            }
+            else {
+                for (var _a = 0, _b = sourceFileOrBundle.sourceFiles; _a < _b.length; _a++) {
+                    var sourceFile = _b[_a];
+                    // Emit only the first encountered shebang
+                    if (emitShebangIfNeeded(sourceFile)) {
+                        break;
+                    }
+                }
+            }
+        }
+        //
+        // Helpers
+        //
+        function emitNodeWithWriter(node, writer) {
+            if (!node)
+                return;
+            var savedWrite = write;
+            write = writer;
+            emit(node);
+            write = savedWrite;
+        }
+        function emitModifiers(node, modifiers) {
+            if (modifiers && modifiers.length) {
+                emitList(node, modifiers, 131328 /* Modifiers */);
+                writeSpace();
+            }
+        }
+        function emitTypeAnnotation(node) {
+            if (node) {
+                writePunctuation(":");
+                writeSpace();
+                emit(node);
+            }
+        }
+        function emitInitializer(node, equalCommentStartPos, container) {
+            if (node) {
+                writeSpace();
+                emitTokenWithComment(58 /* EqualsToken */, equalCommentStartPos, writeOperator, container);
+                writeSpace();
+                emitExpression(node);
+            }
+        }
+        function emitNodeWithPrefix(prefix, prefixWriter, node, emit) {
+            if (node) {
+                prefixWriter(prefix);
+                emit(node);
+            }
+        }
+        function emitWithLeadingSpace(node) {
+            if (node) {
+                writeSpace();
+                emit(node);
+            }
+        }
+        function emitExpressionWithLeadingSpace(node) {
+            if (node) {
+                writeSpace();
+                emitExpression(node);
+            }
+        }
+        function emitWithTrailingSpace(node) {
+            if (node) {
+                emit(node);
+                writeSpace();
+            }
+        }
+        function emitEmbeddedStatement(parent, node) {
+            if (ts.isBlock(node) || ts.getEmitFlags(parent) & 1 /* SingleLine */) {
+                writeSpace();
+                emit(node);
+            }
+            else {
+                writeLine();
+                increaseIndent();
+                emit(node);
+                decreaseIndent();
+            }
+        }
+        function emitDecorators(parentNode, decorators) {
+            emitList(parentNode, decorators, 24577 /* Decorators */);
+        }
+        function emitTypeArguments(parentNode, typeArguments) {
+            emitList(parentNode, typeArguments, 26896 /* TypeArguments */);
+        }
+        function emitTypeParameters(parentNode, typeParameters) {
+            if (ts.isFunctionLike(parentNode) && parentNode.typeArguments) { // Quick info uses type arguments in place of type parameters on instantiated signatures
+                return emitTypeArguments(parentNode, parentNode.typeArguments);
+            }
+            emitList(parentNode, typeParameters, 26896 /* TypeParameters */);
+        }
+        function emitParameters(parentNode, parameters) {
+            emitList(parentNode, parameters, 1296 /* Parameters */);
+        }
+        function canEmitSimpleArrowHead(parentNode, parameters) {
+            var parameter = ts.singleOrUndefined(parameters);
+            return parameter
+                && parameter.pos === parentNode.pos // may not have parsed tokens between parent and parameter
+                && !(ts.isArrowFunction(parentNode) && parentNode.type) // arrow function may not have return type annotation
+                && !ts.some(parentNode.decorators) // parent may not have decorators
+                && !ts.some(parentNode.modifiers) // parent may not have modifiers
+                && !ts.some(parentNode.typeParameters) // parent may not have type parameters
+                && !ts.some(parameter.decorators) // parameter may not have decorators
+                && !ts.some(parameter.modifiers) // parameter may not have modifiers
+                && !parameter.dotDotDotToken // parameter may not be rest
+                && !parameter.questionToken // parameter may not be optional
+                && !parameter.type // parameter may not have a type annotation
+                && !parameter.initializer // parameter may not have an initializer
+                && ts.isIdentifier(parameter.name); // parameter name must be identifier
+        }
+        function emitParametersForArrow(parentNode, parameters) {
+            if (canEmitSimpleArrowHead(parentNode, parameters)) {
+                emitList(parentNode, parameters, 1296 /* Parameters */ & ~1024 /* Parenthesis */);
+            }
+            else {
+                emitParameters(parentNode, parameters);
+            }
+        }
+        function emitParametersForIndexSignature(parentNode, parameters) {
+            emitList(parentNode, parameters, 4432 /* IndexSignatureParameters */);
+        }
+        function emitList(parentNode, children, format, start, count) {
+            emitNodeList(emit, parentNode, children, format, start, count);
+        }
+        function emitExpressionList(parentNode, children, format, start, count) {
+            emitNodeList(emitExpression, parentNode, children, format, start, count); // TODO: GH#18217
+        }
+        function writeDelimiter(format) {
+            switch (format & 28 /* DelimitersMask */) {
+                case 0 /* None */:
+                    break;
+                case 16 /* CommaDelimited */:
+                    writePunctuation(",");
+                    break;
+                case 4 /* BarDelimited */:
+                    writeSpace();
+                    writePunctuation("|");
+                    break;
+                case 8 /* AmpersandDelimited */:
+                    writeSpace();
+                    writePunctuation("&");
+                    break;
+            }
+        }
+        function emitNodeList(emit, parentNode, children, format, start, count) {
+            if (start === void 0) { start = 0; }
+            if (count === void 0) { count = children ? children.length - start : 0; }
+            var isUndefined = children === undefined;
+            if (isUndefined && format & 8192 /* OptionalIfUndefined */) {
+                return;
+            }
+            var isEmpty = children === undefined || start >= children.length || count === 0;
+            if (isEmpty && format & 16384 /* OptionalIfEmpty */) {
+                if (onBeforeEmitNodeArray) {
+                    onBeforeEmitNodeArray(children);
+                }
+                if (onAfterEmitNodeArray) {
+                    onAfterEmitNodeArray(children);
+                }
+                return;
+            }
+            if (format & 7680 /* BracketsMask */) {
+                writePunctuation(getOpeningBracket(format));
+                if (isEmpty && !isUndefined) {
+                    // TODO: GH#18217
+                    emitTrailingCommentsOfPosition(children.pos, /*prefixSpace*/ true); // Emit comments within empty bracketed lists
+                }
+            }
+            if (onBeforeEmitNodeArray) {
+                onBeforeEmitNodeArray(children);
+            }
+            if (isEmpty) {
+                // Write a line terminator if the parent node was multi-line
+                if (format & 1 /* MultiLine */) {
+                    writeLine();
+                }
+                else if (format & 128 /* SpaceBetweenBraces */ && !(format & 262144 /* NoSpaceIfEmpty */)) {
+                    writeSpace();
+                }
+            }
+            else {
+                // Write the opening line terminator or leading whitespace.
+                var mayEmitInterveningComments = (format & 131072 /* NoInterveningComments */) === 0;
+                var shouldEmitInterveningComments = mayEmitInterveningComments;
+                if (shouldWriteLeadingLineTerminator(parentNode, children, format)) { // TODO: GH#18217
+                    writeLine();
+                    shouldEmitInterveningComments = false;
+                }
+                else if (format & 128 /* SpaceBetweenBraces */) {
+                    writeSpace();
+                }
+                // Increase the indent, if requested.
+                if (format & 64 /* Indented */) {
+                    increaseIndent();
+                }
+                // Emit each child.
+                var previousSibling = void 0;
+                var shouldDecreaseIndentAfterEmit = false;
+                for (var i = 0; i < count; i++) {
+                    var child = children[start + i];
+                    // Write the delimiter if this is not the first node.
+                    if (previousSibling) {
+                        // i.e
+                        //      function commentedParameters(
+                        //          /* Parameter a */
+                        //          a
+                        //          /* End of parameter a */ -> this comment isn't considered to be trailing comment of parameter "a" due to newline
+                        //          ,
+                        if (format & 28 /* DelimitersMask */ && previousSibling.end !== parentNode.end) {
+                            emitLeadingCommentsOfPosition(previousSibling.end);
+                        }
+                        writeDelimiter(format);
+                        // Write either a line terminator or whitespace to separate the elements.
+                        if (shouldWriteSeparatingLineTerminator(previousSibling, child, format)) {
+                            // If a synthesized node in a single-line list starts on a new
+                            // line, we should increase the indent.
+                            if ((format & (3 /* LinesMask */ | 64 /* Indented */)) === 0 /* SingleLine */) {
+                                increaseIndent();
+                                shouldDecreaseIndentAfterEmit = true;
+                            }
+                            writeLine();
+                            shouldEmitInterveningComments = false;
+                        }
+                        else if (previousSibling && format & 256 /* SpaceBetweenSiblings */) {
+                            writeSpace();
+                        }
+                    }
+                    // Emit this child.
+                    if (shouldEmitInterveningComments) {
+                        if (emitTrailingCommentsOfPosition) {
+                            var commentRange = ts.getCommentRange(child);
+                            emitTrailingCommentsOfPosition(commentRange.pos);
+                        }
+                    }
+                    else {
+                        shouldEmitInterveningComments = mayEmitInterveningComments;
+                    }
+                    emit(child);
+                    if (shouldDecreaseIndentAfterEmit) {
+                        decreaseIndent();
+                        shouldDecreaseIndentAfterEmit = false;
+                    }
+                    previousSibling = child;
+                }
+                // Write a trailing comma, if requested.
+                var hasTrailingComma = (format & 32 /* AllowTrailingComma */) && children.hasTrailingComma;
+                if (format & 16 /* CommaDelimited */ && hasTrailingComma) {
+                    writePunctuation(",");
+                }
+                // Emit any trailing comment of the last element in the list
+                // i.e
+                //       var array = [...
+                //          2
+                //          /* end of element 2 */
+                //       ];
+                if (previousSibling && format & 28 /* DelimitersMask */ && previousSibling.end !== parentNode.end && !(ts.getEmitFlags(previousSibling) & 1024 /* NoTrailingComments */)) {
+                    emitLeadingCommentsOfPosition(previousSibling.end);
+                }
+                // Decrease the indent, if requested.
+                if (format & 64 /* Indented */) {
+                    decreaseIndent();
+                }
+                // Write the closing line terminator or closing whitespace.
+                if (shouldWriteClosingLineTerminator(parentNode, children, format)) {
+                    writeLine();
+                }
+                else if (format & 128 /* SpaceBetweenBraces */) {
+                    writeSpace();
+                }
+            }
+            if (onAfterEmitNodeArray) {
+                onAfterEmitNodeArray(children);
+            }
+            if (format & 7680 /* BracketsMask */) {
+                if (isEmpty && !isUndefined) {
+                    // TODO: GH#18217
+                    emitLeadingCommentsOfPosition(children.end); // Emit leading comments within empty lists
+                }
+                writePunctuation(getClosingBracket(format));
+            }
+        }
+        function commitPendingSemicolonInternal() {
+            if (pendingSemicolon) {
+                writeSemicolonInternal();
+                pendingSemicolon = false;
+            }
+        }
+        function writeLiteral(s) {
+            commitPendingSemicolon();
+            writer.writeLiteral(s);
+        }
+        function writeStringLiteral(s) {
+            commitPendingSemicolon();
+            writer.writeStringLiteral(s);
+        }
+        function writeBase(s) {
+            commitPendingSemicolon();
+            writer.write(s);
+        }
+        function writeSymbol(s, sym) {
+            commitPendingSemicolon();
+            writer.writeSymbol(s, sym);
+        }
+        function writePunctuation(s) {
+            commitPendingSemicolon();
+            writer.writePunctuation(s);
+        }
+        function deferWriteSemicolon() {
+            pendingSemicolon = true;
+        }
+        function writeSemicolonInternal() {
+            writer.writePunctuation(";");
+        }
+        function writeKeyword(s) {
+            commitPendingSemicolon();
+            writer.writeKeyword(s);
+        }
+        function writeOperator(s) {
+            commitPendingSemicolon();
+            writer.writeOperator(s);
+        }
+        function writeParameter(s) {
+            commitPendingSemicolon();
+            writer.writeParameter(s);
+        }
+        function writeSpace() {
+            commitPendingSemicolon();
+            writer.writeSpace(" ");
+        }
+        function writeProperty(s) {
+            commitPendingSemicolon();
+            writer.writeProperty(s);
+        }
+        function writeLine() {
+            commitPendingSemicolon();
+            writer.writeLine();
+        }
+        function increaseIndent() {
+            commitPendingSemicolon();
+            writer.increaseIndent();
+        }
+        function decreaseIndent() {
+            commitPendingSemicolon();
+            writer.decreaseIndent();
+        }
+        function writeToken(token, pos, writer, contextNode) {
+            return onEmitSourceMapOfToken
+                ? onEmitSourceMapOfToken(contextNode, token, writer, pos, writeTokenText)
+                : writeTokenText(token, writer, pos);
+        }
+        function writeTokenNode(node, writer) {
+            if (onBeforeEmitToken) {
+                onBeforeEmitToken(node);
+            }
+            writer(ts.tokenToString(node.kind));
+            if (onAfterEmitToken) {
+                onAfterEmitToken(node);
+            }
+        }
+        function writeTokenText(token, writer, pos) {
+            var tokenString = ts.tokenToString(token);
+            writer(tokenString);
+            return pos < 0 ? pos : pos + tokenString.length;
+        }
+        function writeLineOrSpace(node) {
+            if (ts.getEmitFlags(node) & 1 /* SingleLine */) {
+                writeSpace();
+            }
+            else {
+                writeLine();
+            }
+        }
+        function writeLines(text) {
+            var lines = text.split(/\r\n?|\n/g);
+            var indentation = ts.guessIndentation(lines);
+            for (var _a = 0, lines_2 = lines; _a < lines_2.length; _a++) {
+                var lineText = lines_2[_a];
+                var line = indentation ? lineText.slice(indentation) : lineText;
+                if (line.length) {
+                    writeLine();
+                    write(line);
+                    writeLine();
+                }
+            }
+        }
+        function increaseIndentIf(value, valueToWriteWhenNotIndenting) {
+            if (value) {
+                increaseIndent();
+                writeLine();
+            }
+            else if (valueToWriteWhenNotIndenting) {
+                write(valueToWriteWhenNotIndenting);
+            }
+        }
+        // Helper function to decrease the indent if we previously indented.  Allows multiple
+        // previous indent values to be considered at a time.  This also allows caller to just
+        // call this once, passing in all their appropriate indent values, instead of needing
+        // to call this helper function multiple times.
+        function decreaseIndentIf(value1, value2) {
+            if (value1) {
+                decreaseIndent();
+            }
+            if (value2) {
+                decreaseIndent();
+            }
+        }
+        function shouldWriteLeadingLineTerminator(parentNode, children, format) {
+            if (format & 1 /* MultiLine */) {
+                return true;
+            }
+            if (format & 2 /* PreserveLines */) {
+                if (format & 32768 /* PreferNewLine */) {
+                    return true;
+                }
+                var firstChild = children[0];
+                if (firstChild === undefined) {
+                    return !ts.rangeIsOnSingleLine(parentNode, currentSourceFile);
+                }
+                else if (ts.positionIsSynthesized(parentNode.pos) || ts.nodeIsSynthesized(firstChild)) {
+                    return synthesizedNodeStartsOnNewLine(firstChild, format);
+                }
+                else {
+                    return !ts.rangeStartPositionsAreOnSameLine(parentNode, firstChild, currentSourceFile);
+                }
+            }
+            else {
+                return false;
+            }
+        }
+        function shouldWriteSeparatingLineTerminator(previousNode, nextNode, format) {
+            if (format & 1 /* MultiLine */) {
+                return true;
+            }
+            else if (format & 2 /* PreserveLines */) {
+                if (previousNode === undefined || nextNode === undefined) {
+                    return false;
+                }
+                else if (ts.nodeIsSynthesized(previousNode) || ts.nodeIsSynthesized(nextNode)) {
+                    return synthesizedNodeStartsOnNewLine(previousNode, format) || synthesizedNodeStartsOnNewLine(nextNode, format);
+                }
+                else {
+                    return !ts.rangeEndIsOnSameLineAsRangeStart(previousNode, nextNode, currentSourceFile);
+                }
+            }
+            else {
+                return ts.getStartsOnNewLine(nextNode);
+            }
+        }
+        function shouldWriteClosingLineTerminator(parentNode, children, format) {
+            if (format & 1 /* MultiLine */) {
+                return (format & 65536 /* NoTrailingNewLine */) === 0;
+            }
+            else if (format & 2 /* PreserveLines */) {
+                if (format & 32768 /* PreferNewLine */) {
+                    return true;
+                }
+                var lastChild = ts.lastOrUndefined(children);
+                if (lastChild === undefined) {
+                    return !ts.rangeIsOnSingleLine(parentNode, currentSourceFile);
+                }
+                else if (ts.positionIsSynthesized(parentNode.pos) || ts.nodeIsSynthesized(lastChild)) {
+                    return synthesizedNodeStartsOnNewLine(lastChild, format);
+                }
+                else {
+                    return !ts.rangeEndPositionsAreOnSameLine(parentNode, lastChild, currentSourceFile);
+                }
+            }
+            else {
+                return false;
+            }
+        }
+        function synthesizedNodeStartsOnNewLine(node, format) {
+            if (ts.nodeIsSynthesized(node)) {
+                var startsOnNewLine = ts.getStartsOnNewLine(node);
+                if (startsOnNewLine === undefined) {
+                    return (format & 32768 /* PreferNewLine */) !== 0;
+                }
+                return startsOnNewLine;
+            }
+            return (format & 32768 /* PreferNewLine */) !== 0;
+        }
+        function needsIndentation(parent, node1, node2) {
+            parent = skipSynthesizedParentheses(parent);
+            node1 = skipSynthesizedParentheses(node1);
+            node2 = skipSynthesizedParentheses(node2);
+            // Always use a newline for synthesized code if the synthesizer desires it.
+            if (ts.getStartsOnNewLine(node2)) {
+                return true;
+            }
+            return !ts.nodeIsSynthesized(parent)
+                && !ts.nodeIsSynthesized(node1)
+                && !ts.nodeIsSynthesized(node2)
+                && !ts.rangeEndIsOnSameLineAsRangeStart(node1, node2, currentSourceFile);
+        }
+        function isEmptyBlock(block) {
+            return block.statements.length === 0
+                && ts.rangeEndIsOnSameLineAsRangeStart(block, block, currentSourceFile);
+        }
+        function skipSynthesizedParentheses(node) {
+            while (node.kind === 191 /* ParenthesizedExpression */ && ts.nodeIsSynthesized(node)) {
+                node = node.expression;
+            }
+            return node;
+        }
+        function getTextOfNode(node, includeTrivia) {
+            if (ts.isGeneratedIdentifier(node)) {
+                return generateName(node);
+            }
+            else if (ts.isIdentifier(node) && (ts.nodeIsSynthesized(node) || !node.parent || !currentSourceFile || (node.parent && currentSourceFile && ts.getSourceFileOfNode(node) !== ts.getOriginalNode(currentSourceFile)))) {
+                return ts.idText(node);
+            }
+            else if (node.kind === 9 /* StringLiteral */ && node.textSourceNode) {
+                return getTextOfNode(node.textSourceNode, includeTrivia);
+            }
+            else if (ts.isLiteralExpression(node) && (ts.nodeIsSynthesized(node) || !node.parent)) {
+                return node.text;
+            }
+            return ts.getSourceTextOfNodeFromSourceFile(currentSourceFile, node, includeTrivia);
+        }
+        function getLiteralTextOfNode(node) {
+            if (node.kind === 9 /* StringLiteral */ && node.textSourceNode) {
+                var textSourceNode = node.textSourceNode;
+                if (ts.isIdentifier(textSourceNode)) {
+                    return ts.getEmitFlags(node) & 16777216 /* NoAsciiEscaping */ ?
+                        "\"" + ts.escapeString(getTextOfNode(textSourceNode)) + "\"" :
+                        "\"" + ts.escapeNonAsciiString(getTextOfNode(textSourceNode)) + "\"";
+                }
+                else {
+                    return getLiteralTextOfNode(textSourceNode);
+                }
+            }
+            return ts.getLiteralText(node, currentSourceFile);
+        }
+        /**
+         * Push a new name generation scope.
+         */
+        function pushNameGenerationScope(node) {
+            if (node && ts.getEmitFlags(node) & 524288 /* ReuseTempVariableScope */) {
+                return;
+            }
+            tempFlagsStack.push(tempFlags);
+            tempFlags = 0;
+            reservedNamesStack.push(reservedNames);
+        }
+        /**
+         * Pop the current name generation scope.
+         */
+        function popNameGenerationScope(node) {
+            if (node && ts.getEmitFlags(node) & 524288 /* ReuseTempVariableScope */) {
+                return;
+            }
+            tempFlags = tempFlagsStack.pop();
+            reservedNames = reservedNamesStack.pop();
+        }
+        function reserveNameInNestedScopes(name) {
+            if (!reservedNames || reservedNames === ts.lastOrUndefined(reservedNamesStack)) {
+                reservedNames = ts.createMap();
+            }
+            reservedNames.set(name, true);
+        }
+        function generateNames(node) {
+            if (!node)
+                return;
+            switch (node.kind) {
+                case 213 /* Block */:
+                    ts.forEach(node.statements, generateNames);
+                    break;
+                case 228 /* LabeledStatement */:
+                case 226 /* WithStatement */:
+                case 218 /* DoStatement */:
+                case 219 /* WhileStatement */:
+                    generateNames(node.statement);
+                    break;
+                case 217 /* IfStatement */:
+                    generateNames(node.thenStatement);
+                    generateNames(node.elseStatement);
+                    break;
+                case 220 /* ForStatement */:
+                case 222 /* ForOfStatement */:
+                case 221 /* ForInStatement */:
+                    generateNames(node.initializer);
+                    generateNames(node.statement);
+                    break;
+                case 227 /* SwitchStatement */:
+                    generateNames(node.caseBlock);
+                    break;
+                case 241 /* CaseBlock */:
+                    ts.forEach(node.clauses, generateNames);
+                    break;
+                case 266 /* CaseClause */:
+                case 267 /* DefaultClause */:
+                    ts.forEach(node.statements, generateNames);
+                    break;
+                case 230 /* TryStatement */:
+                    generateNames(node.tryBlock);
+                    generateNames(node.catchClause);
+                    generateNames(node.finallyBlock);
+                    break;
+                case 269 /* CatchClause */:
+                    generateNames(node.variableDeclaration);
+                    generateNames(node.block);
+                    break;
+                case 214 /* VariableStatement */:
+                    generateNames(node.declarationList);
+                    break;
+                case 233 /* VariableDeclarationList */:
+                    ts.forEach(node.declarations, generateNames);
+                    break;
+                case 232 /* VariableDeclaration */:
+                case 149 /* Parameter */:
+                case 182 /* BindingElement */:
+                case 235 /* ClassDeclaration */:
+                    generateNameIfNeeded(node.name);
+                    break;
+                case 234 /* FunctionDeclaration */:
+                    generateNameIfNeeded(node.name);
+                    if (ts.getEmitFlags(node) & 524288 /* ReuseTempVariableScope */) {
+                        ts.forEach(node.parameters, generateNames);
+                        generateNames(node.body);
+                    }
+                    break;
+                case 180 /* ObjectBindingPattern */:
+                case 181 /* ArrayBindingPattern */:
+                    ts.forEach(node.elements, generateNames);
+                    break;
+                case 244 /* ImportDeclaration */:
+                    generateNames(node.importClause);
+                    break;
+                case 245 /* ImportClause */:
+                    generateNameIfNeeded(node.name);
+                    generateNames(node.namedBindings);
+                    break;
+                case 246 /* NamespaceImport */:
+                    generateNameIfNeeded(node.name);
+                    break;
+                case 247 /* NamedImports */:
+                    ts.forEach(node.elements, generateNames);
+                    break;
+                case 248 /* ImportSpecifier */:
+                    generateNameIfNeeded(node.propertyName || node.name);
+                    break;
+            }
+        }
+        function generateMemberNames(node) {
+            if (!node)
+                return;
+            switch (node.kind) {
+                case 270 /* PropertyAssignment */:
+                case 271 /* ShorthandPropertyAssignment */:
+                case 152 /* PropertyDeclaration */:
+                case 154 /* MethodDeclaration */:
+                case 156 /* GetAccessor */:
+                case 157 /* SetAccessor */:
+                    generateNameIfNeeded(node.name);
+                    break;
+            }
+        }
+        function generateNameIfNeeded(name) {
+            if (name) {
+                if (ts.isGeneratedIdentifier(name)) {
+                    generateName(name);
+                }
+                else if (ts.isBindingPattern(name)) {
+                    generateNames(name);
+                }
+            }
+        }
+        /**
+         * Generate the text for a generated identifier.
+         */
+        function generateName(name) {
+            if ((name.autoGenerateFlags & 7 /* KindMask */) === 4 /* Node */) {
+                // Node names generate unique names based on their original node
+                // and are cached based on that node's id.
+                return generateNameCached(getNodeForGeneratedName(name), name.autoGenerateFlags);
+            }
+            else {
+                // Auto, Loop, and Unique names are cached based on their unique
+                // autoGenerateId.
+                var autoGenerateId = name.autoGenerateId;
+                return autoGeneratedIdToGeneratedName[autoGenerateId] || (autoGeneratedIdToGeneratedName[autoGenerateId] = makeName(name));
+            }
+        }
+        function generateNameCached(node, flags) {
+            var nodeId = ts.getNodeId(node);
+            return nodeIdToGeneratedName[nodeId] || (nodeIdToGeneratedName[nodeId] = generateNameForNode(node, flags));
+        }
+        /**
+         * Returns a value indicating whether a name is unique globally, within the current file,
+         * or within the NameGenerator.
+         */
+        function isUniqueName(name) {
+            return isFileLevelUniqueName(name)
+                && !generatedNames.has(name)
+                && !(reservedNames && reservedNames.has(name));
+        }
+        /**
+         * Returns a value indicating whether a name is unique globally or within the current file.
+         */
+        function isFileLevelUniqueName(name) {
+            return currentSourceFile ? ts.isFileLevelUniqueName(currentSourceFile, name, hasGlobalName) : true;
+        }
+        /**
+         * Returns a value indicating whether a name is unique within a container.
+         */
+        function isUniqueLocalName(name, container) {
+            for (var node = container; ts.isNodeDescendantOf(node, container); node = node.nextContainer) {
+                if (node.locals) {
+                    var local = node.locals.get(ts.escapeLeadingUnderscores(name));
+                    // We conservatively include alias symbols to cover cases where they're emitted as locals
+                    if (local && local.flags & (67216319 /* Value */ | 1048576 /* ExportValue */ | 2097152 /* Alias */)) {
+                        return false;
+                    }
+                }
+            }
+            return true;
+        }
+        /**
+         * Return the next available name in the pattern _a ... _z, _0, _1, ...
+         * TempFlags._i or TempFlags._n may be used to express a preference for that dedicated name.
+         * Note that names generated by makeTempVariableName and makeUniqueName will never conflict.
+         */
+        function makeTempVariableName(flags, reservedInNestedScopes) {
+            if (flags && !(tempFlags & flags)) {
+                var name = flags === 268435456 /* _i */ ? "_i" : "_n";
+                if (isUniqueName(name)) {
+                    tempFlags |= flags;
+                    if (reservedInNestedScopes) {
+                        reserveNameInNestedScopes(name);
+                    }
+                    return name;
+                }
+            }
+            while (true) {
+                var count = tempFlags & 268435455 /* CountMask */;
+                tempFlags++;
+                // Skip over 'i' and 'n'
+                if (count !== 8 && count !== 13) {
+                    var name = count < 26
+                        ? "_" + String.fromCharCode(97 /* a */ + count)
+                        : "_" + (count - 26);
+                    if (isUniqueName(name)) {
+                        if (reservedInNestedScopes) {
+                            reserveNameInNestedScopes(name);
+                        }
+                        return name;
+                    }
+                }
+            }
+        }
+        /**
+         * Generate a name that is unique within the current file and doesn't conflict with any names
+         * in global scope. The name is formed by adding an '_n' suffix to the specified base name,
+         * where n is a positive integer. Note that names generated by makeTempVariableName and
+         * makeUniqueName are guaranteed to never conflict.
+         * If `optimistic` is set, the first instance will use 'baseName' verbatim instead of 'baseName_1'
+         */
+        function makeUniqueName(baseName, checkFn, optimistic, scoped) {
+            if (checkFn === void 0) { checkFn = isUniqueName; }
+            if (optimistic) {
+                if (checkFn(baseName)) {
+                    if (scoped) {
+                        reserveNameInNestedScopes(baseName);
+                    }
+                    else {
+                        generatedNames.set(baseName, true);
+                    }
+                    return baseName;
+                }
+            }
+            // Find the first unique 'name_n', where n is a positive number
+            if (baseName.charCodeAt(baseName.length - 1) !== 95 /* _ */) {
+                baseName += "_";
+            }
+            var i = 1;
+            while (true) {
+                var generatedName = baseName + i;
+                if (checkFn(generatedName)) {
+                    if (scoped) {
+                        reserveNameInNestedScopes(generatedName);
+                    }
+                    else {
+                        generatedNames.set(generatedName, true);
+                    }
+                    return generatedName;
+                }
+                i++;
+            }
+        }
+        function makeFileLevelOptmiisticUniqueName(name) {
+            return makeUniqueName(name, isFileLevelUniqueName, /*optimistic*/ true);
+        }
+        /**
+         * Generates a unique name for a ModuleDeclaration or EnumDeclaration.
+         */
+        function generateNameForModuleOrEnum(node) {
+            var name = getTextOfNode(node.name);
+            // Use module/enum name itself if it is unique, otherwise make a unique variation
+            return isUniqueLocalName(name, node) ? name : makeUniqueName(name);
+        }
+        /**
+         * Generates a unique name for an ImportDeclaration or ExportDeclaration.
+         */
+        function generateNameForImportOrExportDeclaration(node) {
+            var expr = ts.getExternalModuleName(node); // TODO: GH#18217
+            var baseName = ts.isStringLiteral(expr) ?
+                ts.makeIdentifierFromModuleName(expr.text) : "module";
+            return makeUniqueName(baseName);
+        }
+        /**
+         * Generates a unique name for a default export.
+         */
+        function generateNameForExportDefault() {
+            return makeUniqueName("default");
+        }
+        /**
+         * Generates a unique name for a class expression.
+         */
+        function generateNameForClassExpression() {
+            return makeUniqueName("class");
+        }
+        function generateNameForMethodOrAccessor(node) {
+            if (ts.isIdentifier(node.name)) {
+                return generateNameCached(node.name);
+            }
+            return makeTempVariableName(0 /* Auto */);
+        }
+        /**
+         * Generates a unique name from a node.
+         */
+        function generateNameForNode(node, flags) {
+            switch (node.kind) {
+                case 71 /* Identifier */:
+                    return makeUniqueName(getTextOfNode(node), isUniqueName, !!(flags & 16 /* Optimistic */), !!(flags & 8 /* ReservedInNestedScopes */));
+                case 239 /* ModuleDeclaration */:
+                case 238 /* EnumDeclaration */:
+                    return generateNameForModuleOrEnum(node);
+                case 244 /* ImportDeclaration */:
+                case 250 /* ExportDeclaration */:
+                    return generateNameForImportOrExportDeclaration(node);
+                case 234 /* FunctionDeclaration */:
+                case 235 /* ClassDeclaration */:
+                case 249 /* ExportAssignment */:
+                    return generateNameForExportDefault();
+                case 205 /* ClassExpression */:
+                    return generateNameForClassExpression();
+                case 154 /* MethodDeclaration */:
+                case 156 /* GetAccessor */:
+                case 157 /* SetAccessor */:
+                    return generateNameForMethodOrAccessor(node);
+                default:
+                    return makeTempVariableName(0 /* Auto */);
+            }
+        }
+        /**
+         * Generates a unique identifier for a node.
+         */
+        function makeName(name) {
+            switch (name.autoGenerateFlags & 7 /* KindMask */) {
+                case 1 /* Auto */:
+                    return makeTempVariableName(0 /* Auto */, !!(name.autoGenerateFlags & 8 /* ReservedInNestedScopes */));
+                case 2 /* Loop */:
+                    return makeTempVariableName(268435456 /* _i */, !!(name.autoGenerateFlags & 8 /* ReservedInNestedScopes */));
+                case 3 /* Unique */:
+                    return makeUniqueName(ts.idText(name), (name.autoGenerateFlags & 32 /* FileLevel */) ? isFileLevelUniqueName : isUniqueName, !!(name.autoGenerateFlags & 16 /* Optimistic */), !!(name.autoGenerateFlags & 8 /* ReservedInNestedScopes */));
+            }
+            return ts.Debug.fail("Unsupported GeneratedIdentifierKind.");
+        }
+        /**
+         * Gets the node from which a name should be generated.
+         */
+        function getNodeForGeneratedName(name) {
+            var autoGenerateId = name.autoGenerateId;
+            var node = name;
+            var original = node.original;
+            while (original) {
+                node = original;
+                // if "node" is a different generated name (having a different
+                // "autoGenerateId"), use it and stop traversing.
+                if (ts.isIdentifier(node)
+                    && !!(node.autoGenerateFlags & 4 /* Node */)
+                    && node.autoGenerateId !== autoGenerateId) {
+                    break;
+                }
+                original = node.original;
+            }
+            // otherwise, return the original node for the source;
+            return node;
+        }
+    }
+    ts.createPrinter = createPrinter;
+    function createBracketsMap() {
+        var brackets = [];
+        brackets[512 /* Braces */] = ["{", "}"];
+        brackets[1024 /* Parenthesis */] = ["(", ")"];
+        brackets[2048 /* AngleBrackets */] = ["<", ">"];
+        brackets[4096 /* SquareBrackets */] = ["[", "]"];
+        return brackets;
+    }
+    function getOpeningBracket(format) {
+        return brackets[format & 7680 /* BracketsMask */][0];
+    }
+    function getClosingBracket(format) {
+        return brackets[format & 7680 /* BracketsMask */][1];
+    }
+    // Flags enum to track count of temp variables and a few dedicated names
+    var TempFlags;
+    (function (TempFlags) {
+        TempFlags[TempFlags["Auto"] = 0] = "Auto";
+        TempFlags[TempFlags["CountMask"] = 268435455] = "CountMask";
+        TempFlags[TempFlags["_i"] = 268435456] = "_i";
+    })(TempFlags || (TempFlags = {}));
+})(ts || (ts = {}));
+/* @internal */
+var ts;
+(function (ts) {
+    function createCachedDirectoryStructureHost(host, currentDirectory, useCaseSensitiveFileNames) {
+        if (!host.getDirectories || !host.readDirectory) {
+            return undefined;
+        }
+        var cachedReadDirectoryResult = ts.createMap();
+        var getCanonicalFileName = ts.createGetCanonicalFileName(useCaseSensitiveFileNames);
+        return {
+            useCaseSensitiveFileNames: useCaseSensitiveFileNames,
+            fileExists: fileExists,
+            readFile: function (path, encoding) { return host.readFile(path, encoding); },
+            directoryExists: host.directoryExists && directoryExists,
+            getDirectories: getDirectories,
+            readDirectory: readDirectory,
+            createDirectory: host.createDirectory && createDirectory,
+            writeFile: host.writeFile && writeFile,
+            addOrDeleteFileOrDirectory: addOrDeleteFileOrDirectory,
+            addOrDeleteFile: addOrDeleteFile,
+            clearCache: clearCache
+        };
+        function toPath(fileName) {
+            return ts.toPath(fileName, currentDirectory, getCanonicalFileName);
+        }
+        function getCachedFileSystemEntries(rootDirPath) {
+            return cachedReadDirectoryResult.get(ts.ensureTrailingDirectorySeparator(rootDirPath));
+        }
+        function getCachedFileSystemEntriesForBaseDir(path) {
+            return getCachedFileSystemEntries(ts.getDirectoryPath(path));
+        }
+        function getBaseNameOfFileName(fileName) {
+            return ts.getBaseFileName(ts.normalizePath(fileName));
+        }
+        function createCachedFileSystemEntries(rootDir, rootDirPath) {
+            var resultFromHost = {
+                files: ts.map(host.readDirectory(rootDir, /*extensions*/ undefined, /*exclude*/ undefined, /*include*/ ["*.*"]), getBaseNameOfFileName) || [],
+                directories: host.getDirectories(rootDir) || []
+            };
+            cachedReadDirectoryResult.set(ts.ensureTrailingDirectorySeparator(rootDirPath), resultFromHost);
+            return resultFromHost;
+        }
+        /**
+         * If the readDirectory result was already cached, it returns that
+         * Otherwise gets result from host and caches it.
+         * The host request is done under try catch block to avoid caching incorrect result
+         */
+        function tryReadDirectory(rootDir, rootDirPath) {
+            rootDirPath = ts.ensureTrailingDirectorySeparator(rootDirPath);
+            var cachedResult = getCachedFileSystemEntries(rootDirPath);
+            if (cachedResult) {
+                return cachedResult;
+            }
+            try {
+                return createCachedFileSystemEntries(rootDir, rootDirPath);
+            }
+            catch (_e) {
+                // If there is exception to read directories, dont cache the result and direct the calls to host
+                ts.Debug.assert(!cachedReadDirectoryResult.has(ts.ensureTrailingDirectorySeparator(rootDirPath)));
+                return undefined;
+            }
+        }
+        function fileNameEqual(name1, name2) {
+            return getCanonicalFileName(name1) === getCanonicalFileName(name2);
+        }
+        function hasEntry(entries, name) {
+            return ts.some(entries, function (file) { return fileNameEqual(file, name); });
+        }
+        function updateFileSystemEntry(entries, baseName, isValid) {
+            if (hasEntry(entries, baseName)) {
+                if (!isValid) {
+                    return ts.filterMutate(entries, function (entry) { return !fileNameEqual(entry, baseName); });
+                }
+            }
+            else if (isValid) {
+                return entries.push(baseName);
+            }
+        }
+        function writeFile(fileName, data, writeByteOrderMark) {
+            var path = toPath(fileName);
+            var result = getCachedFileSystemEntriesForBaseDir(path);
+            if (result) {
+                updateFilesOfFileSystemEntry(result, getBaseNameOfFileName(fileName), /*fileExists*/ true);
+            }
+            return host.writeFile(fileName, data, writeByteOrderMark);
+        }
+        function fileExists(fileName) {
+            var path = toPath(fileName);
+            var result = getCachedFileSystemEntriesForBaseDir(path);
+            return result && hasEntry(result.files, getBaseNameOfFileName(fileName)) ||
+                host.fileExists(fileName);
+        }
+        function directoryExists(dirPath) {
+            var path = toPath(dirPath);
+            return cachedReadDirectoryResult.has(ts.ensureTrailingDirectorySeparator(path)) || host.directoryExists(dirPath);
+        }
+        function createDirectory(dirPath) {
+            var path = toPath(dirPath);
+            var result = getCachedFileSystemEntriesForBaseDir(path);
+            var baseFileName = getBaseNameOfFileName(dirPath);
+            if (result) {
+                updateFileSystemEntry(result.directories, baseFileName, /*isValid*/ true);
+            }
+            host.createDirectory(dirPath);
+        }
+        function getDirectories(rootDir) {
+            var rootDirPath = toPath(rootDir);
+            var result = tryReadDirectory(rootDir, rootDirPath);
+            if (result) {
+                return result.directories.slice();
+            }
+            return host.getDirectories(rootDir);
+        }
+        function readDirectory(rootDir, extensions, excludes, includes, depth) {
+            var rootDirPath = toPath(rootDir);
+            var result = tryReadDirectory(rootDir, rootDirPath);
+            if (result) {
+                return ts.matchFiles(rootDir, extensions, excludes, includes, useCaseSensitiveFileNames, currentDirectory, depth, getFileSystemEntries);
+            }
+            return host.readDirectory(rootDir, extensions, excludes, includes, depth);
+            function getFileSystemEntries(dir) {
+                var path = toPath(dir);
+                if (path === rootDirPath) {
+                    return result;
+                }
+                return tryReadDirectory(dir, path) || ts.emptyFileSystemEntries;
+            }
+        }
+        function addOrDeleteFileOrDirectory(fileOrDirectory, fileOrDirectoryPath) {
+            var existingResult = getCachedFileSystemEntries(fileOrDirectoryPath);
+            if (existingResult) {
+                // Just clear the cache for now
+                // For now just clear the cache, since this could mean that multiple level entries might need to be re-evaluated
+                clearCache();
+                return undefined;
+            }
+            var parentResult = getCachedFileSystemEntriesForBaseDir(fileOrDirectoryPath);
+            if (!parentResult) {
+                return undefined;
+            }
+            // This was earlier a file (hence not in cached directory contents)
+            // or we never cached the directory containing it
+            if (!host.directoryExists) {
+                // Since host doesnt support directory exists, clear the cache as otherwise it might not be same
+                clearCache();
+                return undefined;
+            }
+            var baseName = getBaseNameOfFileName(fileOrDirectory);
+            var fsQueryResult = {
+                fileExists: host.fileExists(fileOrDirectoryPath),
+                directoryExists: host.directoryExists(fileOrDirectoryPath)
+            };
+            if (fsQueryResult.directoryExists || hasEntry(parentResult.directories, baseName)) {
+                // Folder added or removed, clear the cache instead of updating the folder and its structure
+                clearCache();
+            }
+            else {
+                // No need to update the directory structure, just files
+                updateFilesOfFileSystemEntry(parentResult, baseName, fsQueryResult.fileExists);
+            }
+            return fsQueryResult;
+        }
+        function addOrDeleteFile(fileName, filePath, eventKind) {
+            if (eventKind === ts.FileWatcherEventKind.Changed) {
+                return;
+            }
+            var parentResult = getCachedFileSystemEntriesForBaseDir(filePath);
+            if (parentResult) {
+                updateFilesOfFileSystemEntry(parentResult, getBaseNameOfFileName(fileName), eventKind === ts.FileWatcherEventKind.Created);
+            }
+        }
+        function updateFilesOfFileSystemEntry(parentResult, baseName, fileExists) {
+            updateFileSystemEntry(parentResult.files, baseName, fileExists);
+        }
+        function clearCache() {
+            cachedReadDirectoryResult.clear();
+        }
+    }
+    ts.createCachedDirectoryStructureHost = createCachedDirectoryStructureHost;
+    var ConfigFileProgramReloadLevel;
+    (function (ConfigFileProgramReloadLevel) {
+        ConfigFileProgramReloadLevel[ConfigFileProgramReloadLevel["None"] = 0] = "None";
+        /** Update the file name list from the disk */
+        ConfigFileProgramReloadLevel[ConfigFileProgramReloadLevel["Partial"] = 1] = "Partial";
+        /** Reload completely by re-reading contents of config file from disk and updating program */
+        ConfigFileProgramReloadLevel[ConfigFileProgramReloadLevel["Full"] = 2] = "Full";
+    })(ConfigFileProgramReloadLevel = ts.ConfigFileProgramReloadLevel || (ts.ConfigFileProgramReloadLevel = {}));
+    /**
+     * Updates the existing missing file watches with the new set of missing files after new program is created
+     */
+    function updateMissingFilePathsWatch(program, missingFileWatches, createMissingFileWatch) {
+        var missingFilePaths = program.getMissingFilePaths();
+        var newMissingFilePathMap = ts.arrayToSet(missingFilePaths);
+        // Update the missing file paths watcher
+        ts.mutateMap(missingFileWatches, newMissingFilePathMap, {
+            // Watch the missing files
+            createNewValue: createMissingFileWatch,
+            // Files that are no longer missing (e.g. because they are no longer required)
+            // should no longer be watched.
+            onDeleteValue: ts.closeFileWatcher
+        });
+    }
+    ts.updateMissingFilePathsWatch = updateMissingFilePathsWatch;
+    /**
+     * Updates the existing wild card directory watches with the new set of wild card directories from the config file
+     * after new program is created because the config file was reloaded or program was created first time from the config file
+     * Note that there is no need to call this function when the program is updated with additional files without reloading config files,
+     * as wildcard directories wont change unless reloading config file
+     */
+    function updateWatchingWildcardDirectories(existingWatchedForWildcards, wildcardDirectories, watchDirectory) {
+        ts.mutateMap(existingWatchedForWildcards, wildcardDirectories, {
+            // Create new watch and recursive info
+            createNewValue: createWildcardDirectoryWatcher,
+            // Close existing watch thats not needed any more
+            onDeleteValue: closeFileWatcherOf,
+            // Close existing watch that doesnt match in the flags
+            onExistingValue: updateWildcardDirectoryWatcher
+        });
+        function createWildcardDirectoryWatcher(directory, flags) {
+            // Create new watch and recursive info
+            return {
+                watcher: watchDirectory(directory, flags),
+                flags: flags
+            };
+        }
+        function updateWildcardDirectoryWatcher(existingWatcher, flags, directory) {
+            // Watcher needs to be updated if the recursive flags dont match
+            if (existingWatcher.flags === flags) {
+                return;
+            }
+            existingWatcher.watcher.close();
+            existingWatchedForWildcards.set(directory, createWildcardDirectoryWatcher(directory, flags));
+        }
+    }
+    ts.updateWatchingWildcardDirectories = updateWatchingWildcardDirectories;
+    function isEmittedFileOfProgram(program, file) {
+        if (!program) {
+            return false;
+        }
+        return program.isEmittedFile(file);
+    }
+    ts.isEmittedFileOfProgram = isEmittedFileOfProgram;
+    var WatchLogLevel;
+    (function (WatchLogLevel) {
+        WatchLogLevel[WatchLogLevel["None"] = 0] = "None";
+        WatchLogLevel[WatchLogLevel["TriggerOnly"] = 1] = "TriggerOnly";
+        WatchLogLevel[WatchLogLevel["Verbose"] = 2] = "Verbose";
+    })(WatchLogLevel = ts.WatchLogLevel || (ts.WatchLogLevel = {}));
+    function getWatchFactory(watchLogLevel, log, getDetailWatchInfo) {
+        return getWatchFactoryWith(watchLogLevel, log, getDetailWatchInfo, watchFile, watchDirectory);
+    }
+    ts.getWatchFactory = getWatchFactory;
+    function getWatchFactoryWith(watchLogLevel, log, getDetailWatchInfo, watchFile, watchDirectory) {
+        var createFileWatcher = getCreateFileWatcher(watchLogLevel, watchFile);
+        var createFilePathWatcher = watchLogLevel === WatchLogLevel.None ? watchFilePath : createFileWatcher;
+        var createDirectoryWatcher = getCreateFileWatcher(watchLogLevel, watchDirectory);
+        return {
+            watchFile: function (host, file, callback, pollingInterval, detailInfo1, detailInfo2) {
+                return createFileWatcher(host, file, callback, pollingInterval, /*passThrough*/ undefined, detailInfo1, detailInfo2, watchFile, log, "FileWatcher", getDetailWatchInfo);
+            },
+            watchFilePath: function (host, file, callback, pollingInterval, path, detailInfo1, detailInfo2) {
+                return createFilePathWatcher(host, file, callback, pollingInterval, path, detailInfo1, detailInfo2, watchFile, log, "FileWatcher", getDetailWatchInfo);
+            },
+            watchDirectory: function (host, directory, callback, flags, detailInfo1, detailInfo2) {
+                return createDirectoryWatcher(host, directory, callback, flags, /*passThrough*/ undefined, detailInfo1, detailInfo2, watchDirectory, log, "DirectoryWatcher", getDetailWatchInfo);
+            }
+        };
+        function watchFilePath(host, file, callback, pollingInterval, path) {
+            return watchFile(host, file, function (fileName, eventKind) { return callback(fileName, eventKind, path); }, pollingInterval);
+        }
+    }
+    function watchFile(host, file, callback, pollingInterval) {
+        return host.watchFile(file, callback, pollingInterval);
+    }
+    function watchDirectory(host, directory, callback, flags) {
+        return host.watchDirectory(directory, callback, (flags & 1 /* Recursive */) !== 0);
+    }
+    function getCreateFileWatcher(watchLogLevel, addWatch) {
+        switch (watchLogLevel) {
+            case WatchLogLevel.None:
+                return addWatch;
+            case WatchLogLevel.TriggerOnly:
+                return createFileWatcherWithTriggerLogging;
+            case WatchLogLevel.Verbose:
+                return createFileWatcherWithLogging;
+        }
+    }
+    function createFileWatcherWithLogging(host, file, cb, flags, passThrough, detailInfo1, detailInfo2, addWatch, log, watchCaption, getDetailWatchInfo) {
+        log(watchCaption + ":: Added:: " + getWatchInfo(file, flags, detailInfo1, detailInfo2, getDetailWatchInfo));
+        var watcher = createFileWatcherWithTriggerLogging(host, file, cb, flags, passThrough, detailInfo1, detailInfo2, addWatch, log, watchCaption, getDetailWatchInfo);
+        return {
+            close: function () {
+                log(watchCaption + ":: Close:: " + getWatchInfo(file, flags, detailInfo1, detailInfo2, getDetailWatchInfo));
+                watcher.close();
+            }
+        };
+    }
+    function createFileWatcherWithTriggerLogging(host, file, cb, flags, passThrough, detailInfo1, detailInfo2, addWatch, log, watchCaption, getDetailWatchInfo) {
+        return addWatch(host, file, function (fileName, cbOptional) {
+            var triggerredInfo = watchCaption + ":: Triggered with " + fileName + (cbOptional !== undefined ? cbOptional : "") + ":: " + getWatchInfo(file, flags, detailInfo1, detailInfo2, getDetailWatchInfo);
+            log(triggerredInfo);
+            var start = ts.timestamp();
+            cb(fileName, cbOptional, passThrough);
+            var elapsed = ts.timestamp() - start;
+            log("Elapsed:: " + elapsed + "ms " + triggerredInfo);
+        }, flags);
+    }
+    function getWatchInfo(file, flags, detailInfo1, detailInfo2, getDetailWatchInfo) {
+        return "WatchInfo: " + file + " " + flags + " " + (getDetailWatchInfo ? getDetailWatchInfo(detailInfo1, detailInfo2) : detailInfo1);
+    }
+    function closeFileWatcherOf(objWithWatcher) {
+        objWithWatcher.watcher.close();
+    }
+    ts.closeFileWatcherOf = closeFileWatcherOf;
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var ignoreDiagnosticCommentRegEx = /(^\s*$)|(^\s*\/\/\/?\s*(@ts-ignore)?)/;
+    function findConfigFile(searchPath, fileExists, configName) {
+        if (configName === void 0) { configName = "tsconfig.json"; }
+        return ts.forEachAncestorDirectory(searchPath, function (ancestor) {
+            var fileName = ts.combinePaths(ancestor, configName);
+            return fileExists(fileName) ? fileName : undefined;
+        });
+    }
+    ts.findConfigFile = findConfigFile;
+    function resolveTripleslashReference(moduleName, containingFile) {
+        var basePath = ts.getDirectoryPath(containingFile);
+        var referencedFileName = ts.isRootedDiskPath(moduleName) ? moduleName : ts.combinePaths(basePath, moduleName);
+        return ts.normalizePath(referencedFileName);
+    }
+    ts.resolveTripleslashReference = resolveTripleslashReference;
+    /* @internal */
+    function computeCommonSourceDirectoryOfFilenames(fileNames, currentDirectory, getCanonicalFileName) {
+        var commonPathComponents;
+        var failed = ts.forEach(fileNames, function (sourceFile) {
+            // Each file contributes into common source file path
+            var sourcePathComponents = ts.getNormalizedPathComponents(sourceFile, currentDirectory);
+            sourcePathComponents.pop(); // The base file name is not part of the common directory path
+            if (!commonPathComponents) {
+                // first file
+                commonPathComponents = sourcePathComponents;
+                return;
+            }
+            var n = Math.min(commonPathComponents.length, sourcePathComponents.length);
+            for (var i = 0; i < n; i++) {
+                if (getCanonicalFileName(commonPathComponents[i]) !== getCanonicalFileName(sourcePathComponents[i])) {
+                    if (i === 0) {
+                        // Failed to find any common path component
+                        return true;
+                    }
+                    // New common path found that is 0 -> i-1
+                    commonPathComponents.length = i;
+                    break;
+                }
+            }
+            // If the sourcePathComponents was shorter than the commonPathComponents, truncate to the sourcePathComponents
+            if (sourcePathComponents.length < commonPathComponents.length) {
+                commonPathComponents.length = sourcePathComponents.length;
+            }
+        });
+        // A common path can not be found when paths span multiple drives on windows, for example
+        if (failed) {
+            return "";
+        }
+        if (!commonPathComponents) { // Can happen when all input files are .d.ts files
+            return currentDirectory;
+        }
+        return ts.getPathFromPathComponents(commonPathComponents);
+    }
+    ts.computeCommonSourceDirectoryOfFilenames = computeCommonSourceDirectoryOfFilenames;
+    function createCompilerHost(options, setParentNodes) {
+        var existingDirectories = ts.createMap();
+        function getCanonicalFileName(fileName) {
+            // if underlying system can distinguish between two files whose names differs only in cases then file name already in canonical form.
+            // otherwise use toLowerCase as a canonical form.
+            return ts.sys.useCaseSensitiveFileNames ? fileName : fileName.toLowerCase();
+        }
+        function getSourceFile(fileName, languageVersion, onError) {
+            var text;
+            try {
+                ts.performance.mark("beforeIORead");
+                text = ts.sys.readFile(fileName, options.charset);
+                ts.performance.mark("afterIORead");
+                ts.performance.measure("I/O Read", "beforeIORead", "afterIORead");
+            }
+            catch (e) {
+                if (onError) {
+                    onError(e.message);
+                }
+                text = "";
+            }
+            return text !== undefined ? ts.createSourceFile(fileName, text, languageVersion, setParentNodes) : undefined;
+        }
+        function directoryExists(directoryPath) {
+            if (existingDirectories.has(directoryPath)) {
+                return true;
+            }
+            if (ts.sys.directoryExists(directoryPath)) {
+                existingDirectories.set(directoryPath, true);
+                return true;
+            }
+            return false;
+        }
+        function ensureDirectoriesExist(directoryPath) {
+            if (directoryPath.length > ts.getRootLength(directoryPath) && !directoryExists(directoryPath)) {
+                var parentDirectory = ts.getDirectoryPath(directoryPath);
+                ensureDirectoriesExist(parentDirectory);
+                ts.sys.createDirectory(directoryPath);
+            }
+        }
+        var outputFingerprints;
+        function writeFileIfUpdated(fileName, data, writeByteOrderMark) {
+            if (!outputFingerprints) {
+                outputFingerprints = ts.createMap();
+            }
+            var hash = ts.sys.createHash(data); // TODO: GH#18217
+            var mtimeBefore = ts.sys.getModifiedTime(fileName); // TODO: GH#18217
+            if (mtimeBefore) {
+                var fingerprint = outputFingerprints.get(fileName);
+                // If output has not been changed, and the file has no external modification
+                if (fingerprint &&
+                    fingerprint.byteOrderMark === writeByteOrderMark &&
+                    fingerprint.hash === hash &&
+                    fingerprint.mtime.getTime() === mtimeBefore.getTime()) {
+                    return;
+                }
+            }
+            ts.sys.writeFile(fileName, data, writeByteOrderMark);
+            var mtimeAfter = ts.sys.getModifiedTime(fileName); // TODO: GH#18217
+            outputFingerprints.set(fileName, {
+                hash: hash,
+                byteOrderMark: writeByteOrderMark,
+                mtime: mtimeAfter
+            });
+        }
+        function writeFile(fileName, data, writeByteOrderMark, onError) {
+            try {
+                ts.performance.mark("beforeIOWrite");
+                ensureDirectoriesExist(ts.getDirectoryPath(ts.normalizePath(fileName)));
+                if (ts.isWatchSet(options) && ts.sys.createHash && ts.sys.getModifiedTime) {
+                    writeFileIfUpdated(fileName, data, writeByteOrderMark);
+                }
+                else {
+                    ts.sys.writeFile(fileName, data, writeByteOrderMark);
+                }
+                ts.performance.mark("afterIOWrite");
+                ts.performance.measure("I/O Write", "beforeIOWrite", "afterIOWrite");
+            }
+            catch (e) {
+                if (onError) {
+                    onError(e.message);
+                }
+            }
+        }
+        function getDefaultLibLocation() {
+            return ts.getDirectoryPath(ts.normalizePath(ts.sys.getExecutingFilePath()));
+        }
+        var newLine = ts.getNewLineCharacter(options);
+        var realpath = ts.sys.realpath && (function (path) { return ts.sys.realpath(path); });
+        return {
+            getSourceFile: getSourceFile,
+            getDefaultLibLocation: getDefaultLibLocation,
+            getDefaultLibFileName: function (options) { return ts.combinePaths(getDefaultLibLocation(), ts.getDefaultLibFileName(options)); },
+            writeFile: writeFile,
+            getCurrentDirectory: ts.memoize(function () { return ts.sys.getCurrentDirectory(); }),
+            useCaseSensitiveFileNames: function () { return ts.sys.useCaseSensitiveFileNames; },
+            getCanonicalFileName: getCanonicalFileName,
+            getNewLine: function () { return newLine; },
+            fileExists: function (fileName) { return ts.sys.fileExists(fileName); },
+            readFile: function (fileName) { return ts.sys.readFile(fileName); },
+            trace: function (s) { return ts.sys.write(s + newLine); },
+            directoryExists: function (directoryName) { return ts.sys.directoryExists(directoryName); },
+            getEnvironmentVariable: function (name) { return ts.sys.getEnvironmentVariable ? ts.sys.getEnvironmentVariable(name) : ""; },
+            getDirectories: function (path) { return ts.sys.getDirectories(path); },
+            realpath: realpath,
+            readDirectory: function (path, extensions, include, exclude, depth) { return ts.sys.readDirectory(path, extensions, include, exclude, depth); },
+            getModifiedTime: ts.sys.getModifiedTime && (function (path) { return ts.sys.getModifiedTime(path); }),
+            setModifiedTime: ts.sys.setModifiedTime && (function (path, date) { return ts.sys.setModifiedTime(path, date); }),
+            deleteFile: ts.sys.deleteFile && (function (path) { return ts.sys.deleteFile(path); })
+        };
+    }
+    ts.createCompilerHost = createCompilerHost;
+    function getPreEmitDiagnostics(program, sourceFile, cancellationToken) {
+        var diagnostics = program.getConfigFileParsingDiagnostics().concat(program.getOptionsDiagnostics(cancellationToken), program.getSyntacticDiagnostics(sourceFile, cancellationToken), program.getGlobalDiagnostics(cancellationToken), program.getSemanticDiagnostics(sourceFile, cancellationToken));
+        if (program.getCompilerOptions().declaration) {
+            ts.addRange(diagnostics, program.getDeclarationDiagnostics(sourceFile, cancellationToken));
+        }
+        return ts.sortAndDeduplicateDiagnostics(diagnostics);
+    }
+    ts.getPreEmitDiagnostics = getPreEmitDiagnostics;
+    function formatDiagnostics(diagnostics, host) {
+        var output = "";
+        for (var _i = 0, diagnostics_1 = diagnostics; _i < diagnostics_1.length; _i++) {
+            var diagnostic = diagnostics_1[_i];
+            output += formatDiagnostic(diagnostic, host);
+        }
+        return output;
+    }
+    ts.formatDiagnostics = formatDiagnostics;
+    function formatDiagnostic(diagnostic, host) {
+        var errorMessage = ts.diagnosticCategoryName(diagnostic) + " TS" + diagnostic.code + ": " + flattenDiagnosticMessageText(diagnostic.messageText, host.getNewLine()) + host.getNewLine();
+        if (diagnostic.file) {
+            var _a = ts.getLineAndCharacterOfPosition(diagnostic.file, diagnostic.start), line = _a.line, character = _a.character; // TODO: GH#18217
+            var fileName = diagnostic.file.fileName;
+            var relativeFileName = ts.convertToRelativePath(fileName, host.getCurrentDirectory(), function (fileName) { return host.getCanonicalFileName(fileName); });
+            return relativeFileName + "(" + (line + 1) + "," + (character + 1) + "): " + errorMessage;
+        }
+        return errorMessage;
+    }
+    ts.formatDiagnostic = formatDiagnostic;
+    /** @internal */
+    var ForegroundColorEscapeSequences;
+    (function (ForegroundColorEscapeSequences) {
+        ForegroundColorEscapeSequences["Grey"] = "\u001B[90m";
+        ForegroundColorEscapeSequences["Red"] = "\u001B[91m";
+        ForegroundColorEscapeSequences["Yellow"] = "\u001B[93m";
+        ForegroundColorEscapeSequences["Blue"] = "\u001B[94m";
+        ForegroundColorEscapeSequences["Cyan"] = "\u001B[96m";
+    })(ForegroundColorEscapeSequences = ts.ForegroundColorEscapeSequences || (ts.ForegroundColorEscapeSequences = {}));
+    var gutterStyleSequence = "\u001b[30;47m";
+    var gutterSeparator = " ";
+    var resetEscapeSequence = "\u001b[0m";
+    var ellipsis = "...";
+    function getCategoryFormat(category) {
+        switch (category) {
+            case ts.DiagnosticCategory.Error: return ForegroundColorEscapeSequences.Red;
+            case ts.DiagnosticCategory.Warning: return ForegroundColorEscapeSequences.Yellow;
+            case ts.DiagnosticCategory.Suggestion: return ts.Debug.fail("Should never get an Info diagnostic on the command line.");
+            case ts.DiagnosticCategory.Message: return ForegroundColorEscapeSequences.Blue;
+        }
+    }
+    /** @internal */
+    function formatColorAndReset(text, formatStyle) {
+        return formatStyle + text + resetEscapeSequence;
+    }
+    ts.formatColorAndReset = formatColorAndReset;
+    function padLeft(s, length) {
+        while (s.length < length) {
+            s = " " + s;
+        }
+        return s;
+    }
+    function formatDiagnosticsWithColorAndContext(diagnostics, host) {
+        var output = "";
+        for (var _i = 0, diagnostics_2 = diagnostics; _i < diagnostics_2.length; _i++) {
+            var diagnostic = diagnostics_2[_i];
+            var context = "";
+            if (diagnostic.file) {
+                var start = diagnostic.start, length_4 = diagnostic.length, file = diagnostic.file;
+                var _a = ts.getLineAndCharacterOfPosition(file, start), firstLine = _a.line, firstLineChar = _a.character; // TODO: GH#18217
+                var _b = ts.getLineAndCharacterOfPosition(file, start + length_4), lastLine = _b.line, lastLineChar = _b.character;
+                var lastLineInFile = ts.getLineAndCharacterOfPosition(file, file.text.length).line;
+                var relativeFileName = host ? ts.convertToRelativePath(file.fileName, host.getCurrentDirectory(), function (fileName) { return host.getCanonicalFileName(fileName); }) : file.fileName;
+                var hasMoreThanFiveLines = (lastLine - firstLine) >= 4;
+                var gutterWidth = (lastLine + 1 + "").length;
+                if (hasMoreThanFiveLines) {
+                    gutterWidth = Math.max(ellipsis.length, gutterWidth);
+                }
+                for (var i = firstLine; i <= lastLine; i++) {
+                    context += host.getNewLine();
+                    // If the error spans over 5 lines, we'll only show the first 2 and last 2 lines,
+                    // so we'll skip ahead to the second-to-last line.
+                    if (hasMoreThanFiveLines && firstLine + 1 < i && i < lastLine - 1) {
+                        context += formatColorAndReset(padLeft(ellipsis, gutterWidth), gutterStyleSequence) + gutterSeparator + host.getNewLine();
+                        i = lastLine - 1;
+                    }
+                    var lineStart = ts.getPositionOfLineAndCharacter(file, i, 0);
+                    var lineEnd = i < lastLineInFile ? ts.getPositionOfLineAndCharacter(file, i + 1, 0) : file.text.length;
+                    var lineContent = file.text.slice(lineStart, lineEnd);
+                    lineContent = lineContent.replace(/\s+$/g, ""); // trim from end
+                    lineContent = lineContent.replace("\t", " "); // convert tabs to single spaces
+                    // Output the gutter and the actual contents of the line.
+                    context += formatColorAndReset(padLeft(i + 1 + "", gutterWidth), gutterStyleSequence) + gutterSeparator;
+                    context += lineContent + host.getNewLine();
+                    // Output the gutter and the error span for the line using tildes.
+                    context += formatColorAndReset(padLeft("", gutterWidth), gutterStyleSequence) + gutterSeparator;
+                    context += ForegroundColorEscapeSequences.Red;
+                    if (i === firstLine) {
+                        // If we're on the last line, then limit it to the last character of the last line.
+                        // Otherwise, we'll just squiggle the rest of the line, giving 'slice' no end position.
+                        var lastCharForLine = i === lastLine ? lastLineChar : undefined;
+                        context += lineContent.slice(0, firstLineChar).replace(/\S/g, " ");
+                        context += lineContent.slice(firstLineChar, lastCharForLine).replace(/./g, "~");
+                    }
+                    else if (i === lastLine) {
+                        context += lineContent.slice(0, lastLineChar).replace(/./g, "~");
+                    }
+                    else {
+                        // Squiggle the entire line.
+                        context += lineContent.replace(/./g, "~");
+                    }
+                    context += resetEscapeSequence;
+                }
+                output += formatColorAndReset(relativeFileName, ForegroundColorEscapeSequences.Cyan);
+                output += ":";
+                output += formatColorAndReset("" + (firstLine + 1), ForegroundColorEscapeSequences.Yellow);
+                output += ":";
+                output += formatColorAndReset("" + (firstLineChar + 1), ForegroundColorEscapeSequences.Yellow);
+                output += " - ";
+            }
+            output += formatColorAndReset(ts.diagnosticCategoryName(diagnostic), getCategoryFormat(diagnostic.category));
+            output += formatColorAndReset(" TS" + diagnostic.code + ": ", ForegroundColorEscapeSequences.Grey);
+            output += flattenDiagnosticMessageText(diagnostic.messageText, host.getNewLine());
+            if (diagnostic.file) {
+                output += host.getNewLine();
+                output += context;
+            }
+            output += host.getNewLine();
+        }
+        return output;
+    }
+    ts.formatDiagnosticsWithColorAndContext = formatDiagnosticsWithColorAndContext;
+    function flattenDiagnosticMessageText(messageText, newLine) {
+        if (ts.isString(messageText)) {
+            return messageText;
+        }
+        else {
+            var diagnosticChain = messageText;
+            var result = "";
+            var indent = 0;
+            while (diagnosticChain) {
+                if (indent) {
+                    result += newLine;
+                    for (var i = 0; i < indent; i++) {
+                        result += "  ";
+                    }
+                }
+                result += diagnosticChain.messageText;
+                indent++;
+                diagnosticChain = diagnosticChain.next;
+            }
+            return result;
+        }
+    }
+    ts.flattenDiagnosticMessageText = flattenDiagnosticMessageText;
+    function loadWithLocalCache(names, containingFile, loader) {
+        if (names.length === 0) {
+            return [];
+        }
+        var resolutions = [];
+        var cache = ts.createMap();
+        for (var _i = 0, names_1 = names; _i < names_1.length; _i++) {
+            var name = names_1[_i];
+            var result = void 0;
+            if (cache.has(name)) {
+                result = cache.get(name);
+            }
+            else {
+                cache.set(name, result = loader(name, containingFile));
+            }
+            resolutions.push(result);
+        }
+        return resolutions;
+    }
+    /**
+     * Determines if program structure is upto date or needs to be recreated
+     */
+    /* @internal */
+    function isProgramUptoDate(program, rootFileNames, newOptions, getSourceVersion, fileExists, hasInvalidatedResolution, hasChangedAutomaticTypeDirectiveNames) {
+        // If we haven't created a program yet or have changed automatic type directives, then it is not up-to-date
+        if (!program || hasChangedAutomaticTypeDirectiveNames) {
+            return false;
+        }
+        // If number of files in the program do not match, it is not up-to-date
+        if (program.getRootFileNames().length !== rootFileNames.length) {
+            return false;
+        }
+        // If any file is not up-to-date, then the whole program is not up-to-date
+        if (program.getSourceFiles().some(sourceFileNotUptoDate)) {
+            return false;
+        }
+        // If any of the missing file paths are now created
+        if (program.getMissingFilePaths().some(fileExists)) {
+            return false;
+        }
+        var currentOptions = program.getCompilerOptions();
+        // If the compilation settings do no match, then the program is not up-to-date
+        if (!ts.compareDataObjects(currentOptions, newOptions)) {
+            return false;
+        }
+        // If everything matches but the text of config file is changed,
+        // error locations can change for program options, so update the program
+        if (currentOptions.configFile && newOptions.configFile) {
+            return currentOptions.configFile.text === newOptions.configFile.text;
+        }
+        return true;
+        function sourceFileNotUptoDate(sourceFile) {
+            return sourceFile.version !== getSourceVersion(sourceFile.path) ||
+                hasInvalidatedResolution(sourceFile.path);
+        }
+    }
+    ts.isProgramUptoDate = isProgramUptoDate;
+    function getConfigFileParsingDiagnostics(configFileParseResult) {
+        return configFileParseResult.options.configFile ? configFileParseResult.options.configFile.parseDiagnostics.concat(configFileParseResult.errors) :
+            configFileParseResult.errors;
+    }
+    ts.getConfigFileParsingDiagnostics = getConfigFileParsingDiagnostics;
+    /**
+     * Determined if source file needs to be re-created even if its text hasn't changed
+     */
+    function shouldProgramCreateNewSourceFiles(program, newOptions) {
+        // If any of these options change, we can't reuse old source file even if version match
+        // The change in options like these could result in change in syntax tree change
+        var oldOptions = program && program.getCompilerOptions();
+        return oldOptions && (oldOptions.target !== newOptions.target ||
+            oldOptions.module !== newOptions.module ||
+            oldOptions.moduleResolution !== newOptions.moduleResolution ||
+            oldOptions.noResolve !== newOptions.noResolve ||
+            oldOptions.jsx !== newOptions.jsx ||
+            oldOptions.allowJs !== newOptions.allowJs ||
+            oldOptions.disableSizeLimit !== newOptions.disableSizeLimit ||
+            oldOptions.baseUrl !== newOptions.baseUrl ||
+            !ts.equalOwnProperties(oldOptions.paths, newOptions.paths));
+    }
+    function createCreateProgramOptions(rootNames, options, host, oldProgram, configFileParsingDiagnostics) {
+        return {
+            rootNames: rootNames,
+            options: options,
+            host: host,
+            oldProgram: oldProgram,
+            configFileParsingDiagnostics: configFileParsingDiagnostics
+        };
+    }
+    function createProgram(rootNamesOrOptions, _options, _host, _oldProgram, _configFileParsingDiagnostics) {
+        var createProgramOptions = ts.isArray(rootNamesOrOptions) ? createCreateProgramOptions(rootNamesOrOptions, _options, _host, _oldProgram, _configFileParsingDiagnostics) : rootNamesOrOptions; // TODO: GH#18217
+        var rootNames = createProgramOptions.rootNames, options = createProgramOptions.options, configFileParsingDiagnostics = createProgramOptions.configFileParsingDiagnostics, projectReferences = createProgramOptions.projectReferences;
+        var oldProgram = createProgramOptions.oldProgram;
+        var program;
+        var processingDefaultLibFiles;
+        var processingOtherFiles;
+        var files;
+        var commonSourceDirectory;
+        var diagnosticsProducingTypeChecker;
+        var noDiagnosticsTypeChecker;
+        var classifiableNames;
+        var modifiedFilePaths;
+        var cachedSemanticDiagnosticsForFile = {};
+        var cachedDeclarationDiagnosticsForFile = {};
+        var resolvedTypeReferenceDirectives = ts.createMap();
+        var fileProcessingDiagnostics = ts.createDiagnosticCollection();
+        // The below settings are to track if a .js file should be add to the program if loaded via searching under node_modules.
+        // This works as imported modules are discovered recursively in a depth first manner, specifically:
+        // - For each root file, findSourceFile is called.
+        // - This calls processImportedModules for each module imported in the source file.
+        // - This calls resolveModuleNames, and then calls findSourceFile for each resolved module.
+        // As all these operations happen - and are nested - within the createProgram call, they close over the below variables.
+        // The current resolution depth is tracked by incrementing/decrementing as the depth first search progresses.
+        var maxNodeModuleJsDepth = typeof options.maxNodeModuleJsDepth === "number" ? options.maxNodeModuleJsDepth : 0;
+        var currentNodeModulesDepth = 0;
+        // If a module has some of its imports skipped due to being at the depth limit under node_modules, then track
+        // this, as it may be imported at a shallower depth later, and then it will need its skipped imports processed.
+        var modulesWithElidedImports = ts.createMap();
+        // Track source files that are source files found by searching under node_modules, as these shouldn't be compiled.
+        var sourceFilesFoundSearchingNodeModules = ts.createMap();
+        ts.performance.mark("beforeProgram");
+        var host = createProgramOptions.host || createCompilerHost(options);
+        var configParsingHost = parseConfigHostFromCompilerHost(host);
+        var skipDefaultLib = options.noLib;
+        var getDefaultLibraryFileName = ts.memoize(function () { return host.getDefaultLibFileName(options); });
+        var defaultLibraryPath = host.getDefaultLibLocation ? host.getDefaultLibLocation() : ts.getDirectoryPath(getDefaultLibraryFileName());
+        var programDiagnostics = ts.createDiagnosticCollection();
+        var currentDirectory = host.getCurrentDirectory();
+        var supportedExtensions = ts.getSupportedExtensions(options);
+        // Map storing if there is emit blocking diagnostics for given input
+        var hasEmitBlockingDiagnostics = ts.createMap();
+        var _compilerOptionsObjectLiteralSyntax;
+        var _referencesArrayLiteralSyntax;
+        var moduleResolutionCache;
+        var resolveModuleNamesWorker;
+        var hasInvalidatedResolution = host.hasInvalidatedResolution || ts.returnFalse;
+        if (host.resolveModuleNames) {
+            resolveModuleNamesWorker = function (moduleNames, containingFile, reusedNames) { return host.resolveModuleNames(ts.Debug.assertEachDefined(moduleNames), containingFile, reusedNames).map(function (resolved) {
+                // An older host may have omitted extension, in which case we should infer it from the file extension of resolvedFileName.
+                if (!resolved || resolved.extension !== undefined) {
+                    return resolved;
+                }
+                var withExtension = ts.clone(resolved);
+                withExtension.extension = ts.extensionFromPath(resolved.resolvedFileName);
+                return withExtension;
+            }); };
+        }
+        else {
+            moduleResolutionCache = ts.createModuleResolutionCache(currentDirectory, function (x) { return host.getCanonicalFileName(x); });
+            var loader_1 = function (moduleName, containingFile) { return ts.resolveModuleName(moduleName, containingFile, options, host, moduleResolutionCache).resolvedModule; }; // TODO: GH#18217
+            resolveModuleNamesWorker = function (moduleNames, containingFile) { return loadWithLocalCache(ts.Debug.assertEachDefined(moduleNames), containingFile, loader_1); };
+        }
+        var resolveTypeReferenceDirectiveNamesWorker;
+        if (host.resolveTypeReferenceDirectives) {
+            resolveTypeReferenceDirectiveNamesWorker = function (typeDirectiveNames, containingFile) { return host.resolveTypeReferenceDirectives(ts.Debug.assertEachDefined(typeDirectiveNames), containingFile); };
+        }
+        else {
+            var loader_2 = function (typesRef, containingFile) { return ts.resolveTypeReferenceDirective(typesRef, containingFile, options, host).resolvedTypeReferenceDirective; }; // TODO: GH#18217
+            resolveTypeReferenceDirectiveNamesWorker = function (typeReferenceDirectiveNames, containingFile) { return loadWithLocalCache(ts.Debug.assertEachDefined(typeReferenceDirectiveNames), containingFile, loader_2); };
+        }
+        // Map from a stringified PackageId to the source file with that id.
+        // Only one source file may have a given packageId. Others become redirects (see createRedirectSourceFile).
+        // `packageIdToSourceFile` is only used while building the program, while `sourceFileToPackageName` and `isSourceFileTargetOfRedirect` are kept around.
+        var packageIdToSourceFile = ts.createMap();
+        // Maps from a SourceFile's `.path` to the name of the package it was imported with.
+        var sourceFileToPackageName = ts.createMap();
+        var redirectTargetsSet = ts.createMap();
+        var filesByName = ts.createMap();
+        var missingFilePaths;
+        // stores 'filename -> file association' ignoring case
+        // used to track cases when two file names differ only in casing
+        var filesByNameIgnoreCase = host.useCaseSensitiveFileNames() ? ts.createMap() : undefined;
+        // A parallel array to projectReferences storing the results of reading in the referenced tsconfig files
+        var resolvedProjectReferences = projectReferences ? [] : undefined;
+        var projectReferenceRedirects = ts.createMap();
+        var shouldCreateNewSourceFile = shouldProgramCreateNewSourceFiles(oldProgram, options);
+        var structuralIsReused = tryReuseStructureFromOldProgram();
+        if (structuralIsReused !== 2 /* Completely */) {
+            processingDefaultLibFiles = [];
+            processingOtherFiles = [];
+            if (projectReferences) {
+                for (var _i = 0, projectReferences_1 = projectReferences; _i < projectReferences_1.length; _i++) {
+                    var ref = projectReferences_1[_i];
+                    var parsedRef = parseProjectReferenceConfigFile(ref);
+                    resolvedProjectReferences.push(parsedRef);
+                    if (parsedRef) {
+                        if (parsedRef.commandLine.options.outFile) {
+                            var dtsOutfile = ts.changeExtension(parsedRef.commandLine.options.outFile, ".d.ts");
+                            processSourceFile(dtsOutfile, /*isDefaultLib*/ false, /*ignoreNoDefaultLib*/ false, /*packageId*/ undefined);
+                        }
+                        addProjectReferenceRedirects(parsedRef.commandLine, projectReferenceRedirects);
+                    }
+                }
+            }
+            ts.forEach(rootNames, function (name) { return processRootFile(name, /*isDefaultLib*/ false, /*ignoreNoDefaultLib*/ false); });
+            // load type declarations specified via 'types' argument or implicitly from types/ and node_modules/@types folders
+            var typeReferences = ts.getAutomaticTypeDirectiveNames(options, host);
+            if (typeReferences.length) {
+                // This containingFilename needs to match with the one used in managed-side
+                var containingDirectory = options.configFilePath ? ts.getDirectoryPath(options.configFilePath) : host.getCurrentDirectory();
+                var containingFilename = ts.combinePaths(containingDirectory, "__inferred type names__.ts");
+                var resolutions = resolveTypeReferenceDirectiveNamesWorker(typeReferences, containingFilename);
+                for (var i = 0; i < typeReferences.length; i++) {
+                    processTypeReferenceDirective(typeReferences[i], resolutions[i]);
+                }
+            }
+            // Do not process the default library if:
+            //  - The '--noLib' flag is used.
+            //  - A 'no-default-lib' reference comment is encountered in
+            //      processing the root files.
+            if (!skipDefaultLib) {
+                // If '--lib' is not specified, include default library file according to '--target'
+                // otherwise, using options specified in '--lib' instead of '--target' default library file
+                var defaultLibraryFileName = getDefaultLibraryFileName();
+                if (!options.lib && defaultLibraryFileName) {
+                    processRootFile(defaultLibraryFileName, /*isDefaultLib*/ true, /*ignoreNoDefaultLib*/ false);
+                }
+                else {
+                    ts.forEach(options.lib, function (libFileName) {
+                        processRootFile(ts.combinePaths(defaultLibraryPath, libFileName), /*isDefaultLib*/ true, /*ignoreNoDefaultLib*/ false);
+                    });
+                }
+            }
+            missingFilePaths = ts.arrayFrom(filesByName.keys(), function (p) { return p; }).filter(function (p) { return !filesByName.get(p); });
+            files = ts.stableSort(processingDefaultLibFiles, compareDefaultLibFiles).concat(processingOtherFiles);
+            processingDefaultLibFiles = undefined;
+            processingOtherFiles = undefined;
+        }
+        ts.Debug.assert(!!missingFilePaths);
+        // Release any files we have acquired in the old program but are
+        // not part of the new program.
+        if (oldProgram && host.onReleaseOldSourceFile) {
+            var oldSourceFiles = oldProgram.getSourceFiles();
+            for (var _a = 0, oldSourceFiles_1 = oldSourceFiles; _a < oldSourceFiles_1.length; _a++) {
+                var oldSourceFile = oldSourceFiles_1[_a];
+                if (!getSourceFile(oldSourceFile.path) || shouldCreateNewSourceFile) {
+                    host.onReleaseOldSourceFile(oldSourceFile, oldProgram.getCompilerOptions());
+                }
+            }
+        }
+        // unconditionally set oldProgram to undefined to prevent it from being captured in closure
+        oldProgram = undefined;
+        program = {
+            getRootFileNames: function () { return rootNames; },
+            getSourceFile: getSourceFile,
+            getSourceFileByPath: getSourceFileByPath,
+            getSourceFiles: function () { return files; },
+            getMissingFilePaths: function () { return missingFilePaths; },
+            getCompilerOptions: function () { return options; },
+            getSyntacticDiagnostics: getSyntacticDiagnostics,
+            getOptionsDiagnostics: getOptionsDiagnostics,
+            getGlobalDiagnostics: getGlobalDiagnostics,
+            getSemanticDiagnostics: getSemanticDiagnostics,
+            getSuggestionDiagnostics: getSuggestionDiagnostics,
+            getDeclarationDiagnostics: getDeclarationDiagnostics,
+            getTypeChecker: getTypeChecker,
+            getClassifiableNames: getClassifiableNames,
+            getDiagnosticsProducingTypeChecker: getDiagnosticsProducingTypeChecker,
+            getCommonSourceDirectory: getCommonSourceDirectory,
+            emit: emit,
+            getCurrentDirectory: function () { return currentDirectory; },
+            getNodeCount: function () { return getDiagnosticsProducingTypeChecker().getNodeCount(); },
+            getIdentifierCount: function () { return getDiagnosticsProducingTypeChecker().getIdentifierCount(); },
+            getSymbolCount: function () { return getDiagnosticsProducingTypeChecker().getSymbolCount(); },
+            getTypeCount: function () { return getDiagnosticsProducingTypeChecker().getTypeCount(); },
+            getFileProcessingDiagnostics: function () { return fileProcessingDiagnostics; },
+            getResolvedTypeReferenceDirectives: function () { return resolvedTypeReferenceDirectives; },
+            isSourceFileFromExternalLibrary: isSourceFileFromExternalLibrary,
+            isSourceFileDefaultLibrary: isSourceFileDefaultLibrary,
+            dropDiagnosticsProducingTypeChecker: dropDiagnosticsProducingTypeChecker,
+            getSourceFileFromReference: getSourceFileFromReference,
+            getLibFileFromReference: getLibFileFromReference,
+            sourceFileToPackageName: sourceFileToPackageName,
+            redirectTargetsSet: redirectTargetsSet,
+            isEmittedFile: isEmittedFile,
+            getConfigFileParsingDiagnostics: getConfigFileParsingDiagnostics,
+            getResolvedModuleWithFailedLookupLocationsFromCache: getResolvedModuleWithFailedLookupLocationsFromCache,
+            getProjectReferences: getProjectReferences
+        };
+        verifyCompilerOptions();
+        ts.performance.mark("afterProgram");
+        ts.performance.measure("Program", "beforeProgram", "afterProgram");
+        return program;
+        function compareDefaultLibFiles(a, b) {
+            return ts.compareValues(getDefaultLibFilePriority(a), getDefaultLibFilePriority(b));
+        }
+        function getDefaultLibFilePriority(a) {
+            if (ts.containsPath(defaultLibraryPath, a.fileName, /*ignoreCase*/ false)) {
+                var basename = ts.getBaseFileName(a.fileName);
+                if (basename === "lib.d.ts" || basename === "lib.es6.d.ts")
+                    return 0;
+                var name = ts.removeSuffix(ts.removePrefix(basename, "lib."), ".d.ts");
+                var index = ts.libs.indexOf(name);
+                if (index !== -1)
+                    return index + 1;
+            }
+            return ts.libs.length + 2;
+        }
+        function getResolvedModuleWithFailedLookupLocationsFromCache(moduleName, containingFile) {
+            return moduleResolutionCache && ts.resolveModuleNameFromCache(moduleName, containingFile, moduleResolutionCache);
+        }
+        function toPath(fileName) {
+            return ts.toPath(fileName, currentDirectory, getCanonicalFileName);
+        }
+        function getCommonSourceDirectory() {
+            if (commonSourceDirectory === undefined) {
+                var emittedFiles = ts.filter(files, function (file) { return ts.sourceFileMayBeEmitted(file, options, isSourceFileFromExternalLibrary); });
+                if (options.rootDir && checkSourceFilesBelongToPath(emittedFiles, options.rootDir)) {
+                    // If a rootDir is specified use it as the commonSourceDirectory
+                    commonSourceDirectory = ts.getNormalizedAbsolutePath(options.rootDir, currentDirectory);
+                }
+                else if (options.composite) {
+                    // Project compilations never infer their root from the input source paths
+                    commonSourceDirectory = ts.getDirectoryPath(ts.normalizeSlashes(options.configFilePath)); // TODO: GH#18217
+                    checkSourceFilesBelongToPath(emittedFiles, commonSourceDirectory);
+                }
+                else {
+                    commonSourceDirectory = computeCommonSourceDirectory(emittedFiles);
+                }
+                if (commonSourceDirectory && commonSourceDirectory[commonSourceDirectory.length - 1] !== ts.directorySeparator) {
+                    // Make sure directory path ends with directory separator so this string can directly
+                    // used to replace with "" to get the relative path of the source file and the relative path doesn't
+                    // start with / making it rooted path
+                    commonSourceDirectory += ts.directorySeparator;
+                }
+            }
+            return commonSourceDirectory;
+        }
+        function getClassifiableNames() {
+            if (!classifiableNames) {
+                // Initialize a checker so that all our files are bound.
+                getTypeChecker();
+                classifiableNames = ts.createUnderscoreEscapedMap();
+                for (var _i = 0, files_2 = files; _i < files_2.length; _i++) {
+                    var sourceFile = files_2[_i];
+                    ts.copyEntries(sourceFile.classifiableNames, classifiableNames);
+                }
+            }
+            return classifiableNames;
+        }
+        function resolveModuleNamesReusingOldState(moduleNames, containingFile, file, oldProgramState) {
+            if (structuralIsReused === 0 /* Not */ && !file.ambientModuleNames.length) {
+                // If the old program state does not permit reusing resolutions and `file` does not contain locally defined ambient modules,
+                // the best we can do is fallback to the default logic.
+                return resolveModuleNamesWorker(moduleNames, containingFile);
+            }
+            var oldSourceFile = oldProgramState.program && oldProgramState.program.getSourceFile(containingFile);
+            if (oldSourceFile !== file && file.resolvedModules) {
+                // `file` was created for the new program.
+                //
+                // We only set `file.resolvedModules` via work from the current function,
+                // so it is defined iff we already called the current function on `file`.
+                // That call happened no later than the creation of the `file` object,
+                // which per above occurred during the current program creation.
+                // Since we assume the filesystem does not change during program creation,
+                // it is safe to reuse resolutions from the earlier call.
+                var result_4 = [];
+                for (var _i = 0, moduleNames_1 = moduleNames; _i < moduleNames_1.length; _i++) {
+                    var moduleName = moduleNames_1[_i];
+                    var resolvedModule = file.resolvedModules.get(moduleName);
+                    result_4.push(resolvedModule);
+                }
+                return result_4;
+            }
+            // At this point, we know at least one of the following hold:
+            // - file has local declarations for ambient modules
+            // - old program state is available
+            // With this information, we can infer some module resolutions without performing resolution.
+            /** An ordered list of module names for which we cannot recover the resolution. */
+            var unknownModuleNames;
+            /**
+             * The indexing of elements in this list matches that of `moduleNames`.
+             *
+             * Before combining results, result[i] is in one of the following states:
+             * * undefined: needs to be recomputed,
+             * * predictedToResolveToAmbientModuleMarker: known to be an ambient module.
+             * Needs to be reset to undefined before returning,
+             * * ResolvedModuleFull instance: can be reused.
+             */
+            var result;
+            var reusedNames;
+            /** A transient placeholder used to mark predicted resolution in the result list. */
+            var predictedToResolveToAmbientModuleMarker = {};
+            for (var i = 0; i < moduleNames.length; i++) {
+                var moduleName = moduleNames[i];
+                // If the source file is unchanged and doesnt have invalidated resolution, reuse the module resolutions
+                if (file === oldSourceFile && !hasInvalidatedResolution(oldSourceFile.path)) {
+                    var oldResolvedModule = oldSourceFile && oldSourceFile.resolvedModules.get(moduleName);
+                    if (oldResolvedModule) {
+                        if (ts.isTraceEnabled(options, host)) {
+                            ts.trace(host, ts.Diagnostics.Reusing_resolution_of_module_0_to_file_1_from_old_program, moduleName, containingFile);
+                        }
+                        (result || (result = new Array(moduleNames.length)))[i] = oldResolvedModule;
+                        (reusedNames || (reusedNames = [])).push(moduleName);
+                        continue;
+                    }
+                }
+                // We know moduleName resolves to an ambient module provided that moduleName:
+                // - is in the list of ambient modules locally declared in the current source file.
+                // - resolved to an ambient module in the old program whose declaration is in an unmodified file
+                //   (so the same module declaration will land in the new program)
+                var resolvesToAmbientModuleInNonModifiedFile = false;
+                if (ts.contains(file.ambientModuleNames, moduleName)) {
+                    resolvesToAmbientModuleInNonModifiedFile = true;
+                    if (ts.isTraceEnabled(options, host)) {
+                        ts.trace(host, ts.Diagnostics.Module_0_was_resolved_as_locally_declared_ambient_module_in_file_1, moduleName, containingFile);
+                    }
+                }
+                else {
+                    resolvesToAmbientModuleInNonModifiedFile = moduleNameResolvesToAmbientModuleInNonModifiedFile(moduleName, oldProgramState);
+                }
+                if (resolvesToAmbientModuleInNonModifiedFile) {
+                    (result || (result = new Array(moduleNames.length)))[i] = predictedToResolveToAmbientModuleMarker;
+                }
+                else {
+                    // Resolution failed in the old program, or resolved to an ambient module for which we can't reuse the result.
+                    (unknownModuleNames || (unknownModuleNames = [])).push(moduleName);
+                }
+            }
+            var resolutions = unknownModuleNames && unknownModuleNames.length
+                ? resolveModuleNamesWorker(unknownModuleNames, containingFile, reusedNames)
+                : ts.emptyArray;
+            // Combine results of resolutions and predicted results
+            if (!result) {
+                // There were no unresolved/ambient resolutions.
+                ts.Debug.assert(resolutions.length === moduleNames.length);
+                return resolutions;
+            }
+            var j = 0;
+            for (var i = 0; i < result.length; i++) {
+                if (result[i]) {
+                    // `result[i]` is either a `ResolvedModuleFull` or a marker.
+                    // If it is the former, we can leave it as is.
+                    if (result[i] === predictedToResolveToAmbientModuleMarker) {
+                        result[i] = undefined; // TODO: GH#18217
+                    }
+                }
+                else {
+                    result[i] = resolutions[j];
+                    j++;
+                }
+            }
+            ts.Debug.assert(j === resolutions.length);
+            return result;
+            // If we change our policy of rechecking failed lookups on each program create,
+            // we should adjust the value returned here.
+            function moduleNameResolvesToAmbientModuleInNonModifiedFile(moduleName, oldProgramState) {
+                var resolutionToFile = ts.getResolvedModule(oldProgramState.oldSourceFile, moduleName); // TODO: GH#18217
+                var resolvedFile = resolutionToFile && oldProgramState.program && oldProgramState.program.getSourceFile(resolutionToFile.resolvedFileName);
+                if (resolutionToFile && resolvedFile && !resolvedFile.externalModuleIndicator) {
+                    // In the old program, we resolved to an ambient module that was in the same
+                    //   place as we expected to find an actual module file.
+                    // We actually need to return 'false' here even though this seems like a 'true' case
+                    //   because the normal module resolution algorithm will find this anyway.
+                    return false;
+                }
+                var ambientModule = oldProgramState.program && oldProgramState.program.getTypeChecker().tryFindAmbientModuleWithoutAugmentations(moduleName);
+                if (!(ambientModule && ambientModule.declarations)) {
+                    return false;
+                }
+                // at least one of declarations should come from non-modified source file
+                var firstUnmodifiedFile = ts.forEach(ambientModule.declarations, function (d) {
+                    var f = ts.getSourceFileOfNode(d);
+                    return !ts.contains(oldProgramState.modifiedFilePaths, f.path) && f;
+                });
+                if (!firstUnmodifiedFile) {
+                    return false;
+                }
+                if (ts.isTraceEnabled(options, host)) {
+                    ts.trace(host, ts.Diagnostics.Module_0_was_resolved_as_ambient_module_declared_in_1_since_this_file_was_not_modified, moduleName, firstUnmodifiedFile.fileName);
+                }
+                return true;
+            }
+        }
+        function tryReuseStructureFromOldProgram() {
+            if (!oldProgram) {
+                return 0 /* Not */;
+            }
+            // check properties that can affect structure of the program or module resolution strategy
+            // if any of these properties has changed - structure cannot be reused
+            var oldOptions = oldProgram.getCompilerOptions();
+            if (ts.changesAffectModuleResolution(oldOptions, options)) {
+                return oldProgram.structureIsReused = 0 /* Not */;
+            }
+            ts.Debug.assert(!(oldProgram.structureIsReused & (2 /* Completely */ | 1 /* SafeModules */)));
+            // there is an old program, check if we can reuse its structure
+            var oldRootNames = oldProgram.getRootFileNames();
+            if (!ts.arrayIsEqualTo(oldRootNames, rootNames)) {
+                return oldProgram.structureIsReused = 0 /* Not */;
+            }
+            if (!ts.arrayIsEqualTo(options.types, oldOptions.types)) {
+                return oldProgram.structureIsReused = 0 /* Not */;
+            }
+            // Check if any referenced project tsconfig files are different
+            var oldRefs = oldProgram.getProjectReferences();
+            if (projectReferences) {
+                if (!oldRefs) {
+                    return oldProgram.structureIsReused = 0 /* Not */;
+                }
+                for (var i = 0; i < projectReferences.length; i++) {
+                    var oldRef = oldRefs[i];
+                    if (oldRef) {
+                        var newRef = parseProjectReferenceConfigFile(projectReferences[i]);
+                        if (!newRef || newRef.sourceFile !== oldRef.sourceFile) {
+                            // Resolved project reference has gone missing or changed
+                            return oldProgram.structureIsReused = 0 /* Not */;
+                        }
+                    }
+                    else {
+                        // A previously-unresolved reference may be resolved now
+                        if (parseProjectReferenceConfigFile(projectReferences[i]) !== undefined) {
+                            return oldProgram.structureIsReused = 0 /* Not */;
+                        }
+                    }
+                }
+            }
+            else {
+                if (oldRefs) {
+                    return oldProgram.structureIsReused = 0 /* Not */;
+                }
+            }
+            // check if program source files has changed in the way that can affect structure of the program
+            var newSourceFiles = [];
+            var filePaths = [];
+            var modifiedSourceFiles = [];
+            oldProgram.structureIsReused = 2 /* Completely */;
+            // If the missing file paths are now present, it can change the progam structure,
+            // and hence cant reuse the structure.
+            // This is same as how we dont reuse the structure if one of the file from old program is now missing
+            if (oldProgram.getMissingFilePaths().some(function (missingFilePath) { return host.fileExists(missingFilePath); })) {
+                return oldProgram.structureIsReused = 0 /* Not */;
+            }
+            var oldSourceFiles = oldProgram.getSourceFiles();
+            var SeenPackageName;
+            (function (SeenPackageName) {
+                SeenPackageName[SeenPackageName["Exists"] = 0] = "Exists";
+                SeenPackageName[SeenPackageName["Modified"] = 1] = "Modified";
+            })(SeenPackageName || (SeenPackageName = {}));
+            var seenPackageNames = ts.createMap();
+            for (var _i = 0, oldSourceFiles_2 = oldSourceFiles; _i < oldSourceFiles_2.length; _i++) {
+                var oldSourceFile = oldSourceFiles_2[_i];
+                var newSourceFile = host.getSourceFileByPath
+                    ? host.getSourceFileByPath(oldSourceFile.fileName, oldSourceFile.resolvedPath || oldSourceFile.path, options.target, /*onError*/ undefined, shouldCreateNewSourceFile)
+                    : host.getSourceFile(oldSourceFile.fileName, options.target, /*onError*/ undefined, shouldCreateNewSourceFile); // TODO: GH#18217
+                if (!newSourceFile) {
+                    return oldProgram.structureIsReused = 0 /* Not */;
+                }
+                ts.Debug.assert(!newSourceFile.redirectInfo, "Host should not return a redirect source file from `getSourceFile`");
+                var fileChanged = void 0;
+                if (oldSourceFile.redirectInfo) {
+                    // We got `newSourceFile` by path, so it is actually for the unredirected file.
+                    // This lets us know if the unredirected file has changed. If it has we should break the redirect.
+                    if (newSourceFile !== oldSourceFile.redirectInfo.unredirected) {
+                        // Underlying file has changed. Might not redirect anymore. Must rebuild program.
+                        return oldProgram.structureIsReused = 0 /* Not */;
+                    }
+                    fileChanged = false;
+                    newSourceFile = oldSourceFile; // Use the redirect.
+                }
+                else if (oldProgram.redirectTargetsSet.has(oldSourceFile.path)) {
+                    // If a redirected-to source file changes, the redirect may be broken.
+                    if (newSourceFile !== oldSourceFile) {
+                        return oldProgram.structureIsReused = 0 /* Not */;
+                    }
+                    fileChanged = false;
+                }
+                else {
+                    fileChanged = newSourceFile !== oldSourceFile;
+                }
+                newSourceFile.path = oldSourceFile.path;
+                filePaths.push(newSourceFile.path);
+                var packageName = oldProgram.sourceFileToPackageName.get(oldSourceFile.path);
+                if (packageName !== undefined) {
+                    // If there are 2 different source files for the same package name and at least one of them changes,
+                    // they might become redirects. So we must rebuild the program.
+                    var prevKind = seenPackageNames.get(packageName);
+                    var newKind = fileChanged ? 1 /* Modified */ : 0 /* Exists */;
+                    if ((prevKind !== undefined && newKind === 1 /* Modified */) || prevKind === 1 /* Modified */) {
+                        return oldProgram.structureIsReused = 0 /* Not */;
+                    }
+                    seenPackageNames.set(packageName, newKind);
+                }
+                if (fileChanged) {
+                    // The `newSourceFile` object was created for the new program.
+                    if (!ts.arrayIsEqualTo(oldSourceFile.libReferenceDirectives, newSourceFile.libReferenceDirectives, fileReferenceIsEqualTo)) {
+                        // 'lib' references has changed. Matches behavior in changesAffectModuleResolution
+                        return oldProgram.structureIsReused = 0 /* Not */;
+                    }
+                    if (oldSourceFile.hasNoDefaultLib !== newSourceFile.hasNoDefaultLib) {
+                        // value of no-default-lib has changed
+                        // this will affect if default library is injected into the list of files
+                        oldProgram.structureIsReused = 1 /* SafeModules */;
+                    }
+                    // check tripleslash references
+                    if (!ts.arrayIsEqualTo(oldSourceFile.referencedFiles, newSourceFile.referencedFiles, fileReferenceIsEqualTo)) {
+                        // tripleslash references has changed
+                        oldProgram.structureIsReused = 1 /* SafeModules */;
+                    }
+                    // check imports and module augmentations
+                    collectExternalModuleReferences(newSourceFile);
+                    if (!ts.arrayIsEqualTo(oldSourceFile.imports, newSourceFile.imports, moduleNameIsEqualTo)) {
+                        // imports has changed
+                        oldProgram.structureIsReused = 1 /* SafeModules */;
+                    }
+                    if (!ts.arrayIsEqualTo(oldSourceFile.moduleAugmentations, newSourceFile.moduleAugmentations, moduleNameIsEqualTo)) {
+                        // moduleAugmentations has changed
+                        oldProgram.structureIsReused = 1 /* SafeModules */;
+                    }
+                    if ((oldSourceFile.flags & 1572864 /* PermanentlySetIncrementalFlags */) !== (newSourceFile.flags & 1572864 /* PermanentlySetIncrementalFlags */)) {
+                        // dynamicImport has changed
+                        oldProgram.structureIsReused = 1 /* SafeModules */;
+                    }
+                    if (!ts.arrayIsEqualTo(oldSourceFile.typeReferenceDirectives, newSourceFile.typeReferenceDirectives, fileReferenceIsEqualTo)) {
+                        // 'types' references has changed
+                        oldProgram.structureIsReused = 1 /* SafeModules */;
+                    }
+                    // tentatively approve the file
+                    modifiedSourceFiles.push({ oldFile: oldSourceFile, newFile: newSourceFile });
+                }
+                else if (hasInvalidatedResolution(oldSourceFile.path)) {
+                    // 'module/types' references could have changed
+                    oldProgram.structureIsReused = 1 /* SafeModules */;
+                    // add file to the modified list so that we will resolve it later
+                    modifiedSourceFiles.push({ oldFile: oldSourceFile, newFile: newSourceFile });
+                }
+                // if file has passed all checks it should be safe to reuse it
+                newSourceFiles.push(newSourceFile);
+            }
+            if (oldProgram.structureIsReused !== 2 /* Completely */) {
+                return oldProgram.structureIsReused;
+            }
+            modifiedFilePaths = modifiedSourceFiles.map(function (f) { return f.newFile.path; });
+            // try to verify results of module resolution
+            for (var _a = 0, modifiedSourceFiles_1 = modifiedSourceFiles; _a < modifiedSourceFiles_1.length; _a++) {
+                var _b = modifiedSourceFiles_1[_a], oldSourceFile = _b.oldFile, newSourceFile = _b.newFile;
+                var newSourceFilePath = ts.getNormalizedAbsolutePath(newSourceFile.fileName, currentDirectory);
+                if (resolveModuleNamesWorker) {
+                    var moduleNames = getModuleNames(newSourceFile);
+                    var oldProgramState = { program: oldProgram, oldSourceFile: oldSourceFile, modifiedFilePaths: modifiedFilePaths };
+                    var resolutions = resolveModuleNamesReusingOldState(moduleNames, newSourceFilePath, newSourceFile, oldProgramState);
+                    // ensure that module resolution results are still correct
+                    var resolutionsChanged = ts.hasChangesInResolutions(moduleNames, resolutions, oldSourceFile.resolvedModules, ts.moduleResolutionIsEqualTo);
+                    if (resolutionsChanged) {
+                        oldProgram.structureIsReused = 1 /* SafeModules */;
+                        newSourceFile.resolvedModules = ts.zipToMap(moduleNames, resolutions);
+                    }
+                    else {
+                        newSourceFile.resolvedModules = oldSourceFile.resolvedModules;
+                    }
+                }
+                if (resolveTypeReferenceDirectiveNamesWorker) {
+                    var typesReferenceDirectives = ts.map(newSourceFile.typeReferenceDirectives, function (x) { return x.fileName; });
+                    var resolutions = resolveTypeReferenceDirectiveNamesWorker(typesReferenceDirectives, newSourceFilePath);
+                    // ensure that types resolutions are still correct
+                    var resolutionsChanged = ts.hasChangesInResolutions(typesReferenceDirectives, resolutions, oldSourceFile.resolvedTypeReferenceDirectiveNames, ts.typeDirectiveIsEqualTo);
+                    if (resolutionsChanged) {
+                        oldProgram.structureIsReused = 1 /* SafeModules */;
+                        newSourceFile.resolvedTypeReferenceDirectiveNames = ts.zipToMap(typesReferenceDirectives, resolutions);
+                    }
+                    else {
+                        newSourceFile.resolvedTypeReferenceDirectiveNames = oldSourceFile.resolvedTypeReferenceDirectiveNames;
+                    }
+                }
+            }
+            if (oldProgram.structureIsReused !== 2 /* Completely */) {
+                return oldProgram.structureIsReused;
+            }
+            if (host.hasChangedAutomaticTypeDirectiveNames) {
+                return oldProgram.structureIsReused = 1 /* SafeModules */;
+            }
+            missingFilePaths = oldProgram.getMissingFilePaths();
+            // update fileName -> file mapping
+            for (var i = 0; i < newSourceFiles.length; i++) {
+                filesByName.set(filePaths[i], newSourceFiles[i]);
+                // Set the file as found during node modules search if it was found that way in old progra,
+                if (oldProgram.isSourceFileFromExternalLibrary(oldProgram.getSourceFileByPath(filePaths[i]))) {
+                    sourceFilesFoundSearchingNodeModules.set(filePaths[i], true);
+                }
+            }
+            files = newSourceFiles;
+            fileProcessingDiagnostics = oldProgram.getFileProcessingDiagnostics();
+            for (var _c = 0, modifiedSourceFiles_2 = modifiedSourceFiles; _c < modifiedSourceFiles_2.length; _c++) {
+                var modifiedFile = modifiedSourceFiles_2[_c];
+                fileProcessingDiagnostics.reattachFileDiagnostics(modifiedFile.newFile);
+            }
+            resolvedTypeReferenceDirectives = oldProgram.getResolvedTypeReferenceDirectives();
+            sourceFileToPackageName = oldProgram.sourceFileToPackageName;
+            redirectTargetsSet = oldProgram.redirectTargetsSet;
+            return oldProgram.structureIsReused = 2 /* Completely */;
+        }
+        function getEmitHost(writeFileCallback) {
+            return __assign({ getPrependNodes: getPrependNodes,
+                getCanonicalFileName: getCanonicalFileName, getCommonSourceDirectory: program.getCommonSourceDirectory, getCompilerOptions: program.getCompilerOptions, getCurrentDirectory: function () { return currentDirectory; }, getNewLine: function () { return host.getNewLine(); }, getSourceFile: program.getSourceFile, getSourceFileByPath: program.getSourceFileByPath, getSourceFiles: program.getSourceFiles, isSourceFileFromExternalLibrary: isSourceFileFromExternalLibrary, writeFile: writeFileCallback || (function (fileName, data, writeByteOrderMark, onError, sourceFiles) { return host.writeFile(fileName, data, writeByteOrderMark, onError, sourceFiles); }), isEmitBlocked: isEmitBlocked, readFile: function (f) { return host.readFile(f); }, fileExists: function (f) { return host.fileExists(f); } }, (host.directoryExists ? { directoryExists: function (f) { return host.directoryExists(f); } } : {}));
+        }
+        function getProjectReferences() {
+            if (!resolvedProjectReferences)
+                return;
+            return resolvedProjectReferences;
+        }
+        function getPrependNodes() {
+            if (!projectReferences) {
+                return ts.emptyArray;
+            }
+            var nodes = [];
+            for (var i = 0; i < projectReferences.length; i++) {
+                var ref = projectReferences[i];
+                var resolvedRefOpts = resolvedProjectReferences[i].commandLine;
+                if (ref.prepend && resolvedRefOpts && resolvedRefOpts.options) {
+                    // Upstream project didn't have outFile set -- skip (error will have been issued earlier)
+                    if (!resolvedRefOpts.options.outFile)
+                        continue;
+                    var dtsFilename = ts.changeExtension(resolvedRefOpts.options.outFile, ".d.ts");
+                    var js = host.readFile(resolvedRefOpts.options.outFile) || "/* Input file " + resolvedRefOpts.options.outFile + " was missing */\r\n";
+                    var jsMap = host.readFile(resolvedRefOpts.options.outFile + ".map"); // TODO: try to read sourceMappingUrl comment from the js file
+                    var dts = host.readFile(dtsFilename) || "/* Input file " + dtsFilename + " was missing */\r\n";
+                    var dtsMap = host.readFile(dtsFilename + ".map");
+                    var node = ts.createInputFiles(js, dts, jsMap, dtsMap);
+                    nodes.push(node);
+                }
+            }
+            return nodes;
+        }
+        function isSourceFileFromExternalLibrary(file) {
+            return !!sourceFilesFoundSearchingNodeModules.get(file.path);
+        }
+        function isSourceFileDefaultLibrary(file) {
+            if (file.hasNoDefaultLib) {
+                return true;
+            }
+            if (!options.noLib) {
+                return false;
+            }
+            // If '--lib' is not specified, include default library file according to '--target'
+            // otherwise, using options specified in '--lib' instead of '--target' default library file
+            var equalityComparer = host.useCaseSensitiveFileNames() ? ts.equateStringsCaseSensitive : ts.equateStringsCaseInsensitive;
+            if (!options.lib) {
+                return equalityComparer(file.fileName, getDefaultLibraryFileName());
+            }
+            else {
+                return ts.some(options.lib, function (libFileName) { return equalityComparer(file.fileName, ts.combinePaths(defaultLibraryPath, libFileName)); });
+            }
+        }
+        function getDiagnosticsProducingTypeChecker() {
+            return diagnosticsProducingTypeChecker || (diagnosticsProducingTypeChecker = ts.createTypeChecker(program, /*produceDiagnostics:*/ true));
+        }
+        function dropDiagnosticsProducingTypeChecker() {
+            diagnosticsProducingTypeChecker = undefined;
+        }
+        function getTypeChecker() {
+            return noDiagnosticsTypeChecker || (noDiagnosticsTypeChecker = ts.createTypeChecker(program, /*produceDiagnostics:*/ false));
+        }
+        function emit(sourceFile, writeFileCallback, cancellationToken, emitOnlyDtsFiles, transformers) {
+            return runWithCancellationToken(function () { return emitWorker(program, sourceFile, writeFileCallback, cancellationToken, emitOnlyDtsFiles, transformers); });
+        }
+        function isEmitBlocked(emitFileName) {
+            return hasEmitBlockingDiagnostics.has(toPath(emitFileName));
+        }
+        function emitWorker(program, sourceFile, writeFileCallback, cancellationToken, emitOnlyDtsFiles, customTransformers) {
+            var declarationDiagnostics = [];
+            if (!emitOnlyDtsFiles) {
+                if (options.noEmit) {
+                    return { diagnostics: declarationDiagnostics, sourceMaps: undefined, emittedFiles: undefined, emitSkipped: true };
+                }
+                // If the noEmitOnError flag is set, then check if we have any errors so far.  If so,
+                // immediately bail out.  Note that we pass 'undefined' for 'sourceFile' so that we
+                // get any preEmit diagnostics, not just the ones
+                if (options.noEmitOnError) {
+                    var diagnostics = program.getOptionsDiagnostics(cancellationToken).concat(program.getSyntacticDiagnostics(sourceFile, cancellationToken), program.getGlobalDiagnostics(cancellationToken), program.getSemanticDiagnostics(sourceFile, cancellationToken));
+                    if (diagnostics.length === 0 && program.getCompilerOptions().declaration) {
+                        declarationDiagnostics = program.getDeclarationDiagnostics(/*sourceFile*/ undefined, cancellationToken);
+                    }
+                    if (diagnostics.length > 0 || declarationDiagnostics.length > 0) {
+                        return {
+                            diagnostics: ts.concatenate(diagnostics, declarationDiagnostics),
+                            sourceMaps: undefined,
+                            emittedFiles: undefined,
+                            emitSkipped: true
+                        };
+                    }
+                }
+            }
+            // Create the emit resolver outside of the "emitTime" tracking code below.  That way
+            // any cost associated with it (like type checking) are appropriate associated with
+            // the type-checking counter.
+            //
+            // If the -out option is specified, we should not pass the source file to getEmitResolver.
+            // This is because in the -out scenario all files need to be emitted, and therefore all
+            // files need to be type checked. And the way to specify that all files need to be type
+            // checked is to not pass the file to getEmitResolver.
+            var emitResolver = getDiagnosticsProducingTypeChecker().getEmitResolver((options.outFile || options.out) ? undefined : sourceFile, cancellationToken);
+            ts.performance.mark("beforeEmit");
+            var transformers = emitOnlyDtsFiles ? [] : ts.getTransformers(options, customTransformers);
+            var emitResult = ts.emitFiles(emitResolver, getEmitHost(writeFileCallback), sourceFile, // TODO: GH#18217
+            emitOnlyDtsFiles, transformers, customTransformers && customTransformers.afterDeclarations);
+            ts.performance.mark("afterEmit");
+            ts.performance.measure("Emit", "beforeEmit", "afterEmit");
+            return emitResult;
+        }
+        function getSourceFile(fileName) {
+            return getSourceFileByPath(toPath(fileName));
+        }
+        function getSourceFileByPath(path) {
+            return filesByName.get(path);
+        }
+        function getDiagnosticsHelper(sourceFile, getDiagnostics, cancellationToken) {
+            if (sourceFile) {
+                return getDiagnostics(sourceFile, cancellationToken);
+            }
+            return ts.sortAndDeduplicateDiagnostics(ts.flatMap(program.getSourceFiles(), function (sourceFile) {
+                if (cancellationToken) {
+                    cancellationToken.throwIfCancellationRequested();
+                }
+                return getDiagnostics(sourceFile, cancellationToken);
+            }));
+        }
+        function getSyntacticDiagnostics(sourceFile, cancellationToken) {
+            return getDiagnosticsHelper(sourceFile, getSyntacticDiagnosticsForFile, cancellationToken);
+        }
+        function getSemanticDiagnostics(sourceFile, cancellationToken) {
+            return getDiagnosticsHelper(sourceFile, getSemanticDiagnosticsForFile, cancellationToken);
+        }
+        function getDeclarationDiagnostics(sourceFile, cancellationToken) {
+            var options = program.getCompilerOptions();
+            // collect diagnostics from the program only once if either no source file was specified or out/outFile is set (bundled emit)
+            if (!sourceFile || options.out || options.outFile) {
+                return getDeclarationDiagnosticsWorker(sourceFile, cancellationToken);
+            }
+            else {
+                return getDiagnosticsHelper(sourceFile, getDeclarationDiagnosticsForFile, cancellationToken);
+            }
+        }
+        function getSyntacticDiagnosticsForFile(sourceFile) {
+            // For JavaScript files, we report semantic errors for using TypeScript-only
+            // constructs from within a JavaScript file as syntactic errors.
+            if (ts.isSourceFileJavaScript(sourceFile)) {
+                if (!sourceFile.additionalSyntacticDiagnostics) {
+                    sourceFile.additionalSyntacticDiagnostics = getJavaScriptSyntacticDiagnosticsForFile(sourceFile);
+                }
+                return ts.concatenate(sourceFile.additionalSyntacticDiagnostics, sourceFile.parseDiagnostics);
+            }
+            return sourceFile.parseDiagnostics;
+        }
+        function runWithCancellationToken(func) {
+            try {
+                return func();
+            }
+            catch (e) {
+                if (e instanceof ts.OperationCanceledException) {
+                    // We were canceled while performing the operation.  Because our type checker
+                    // might be a bad state, we need to throw it away.
+                    //
+                    // Note: we are overly aggressive here.  We do not actually *have* to throw away
+                    // the "noDiagnosticsTypeChecker".  However, for simplicity, i'd like to keep
+                    // the lifetimes of these two TypeCheckers the same.  Also, we generally only
+                    // cancel when the user has made a change anyways.  And, in that case, we (the
+                    // program instance) will get thrown away anyways.  So trying to keep one of
+                    // these type checkers alive doesn't serve much purpose.
+                    noDiagnosticsTypeChecker = undefined;
+                    diagnosticsProducingTypeChecker = undefined;
+                }
+                throw e;
+            }
+        }
+        function getSemanticDiagnosticsForFile(sourceFile, cancellationToken) {
+            return getAndCacheDiagnostics(sourceFile, cancellationToken, cachedSemanticDiagnosticsForFile, getSemanticDiagnosticsForFileNoCache);
+        }
+        function getSemanticDiagnosticsForFileNoCache(sourceFile, cancellationToken) {
+            return runWithCancellationToken(function () {
+                // If skipLibCheck is enabled, skip reporting errors if file is a declaration file.
+                // If skipDefaultLibCheck is enabled, skip reporting errors if file contains a
+                // '/// <reference no-default-lib="true"/>' directive.
+                if (options.skipLibCheck && sourceFile.isDeclarationFile || options.skipDefaultLibCheck && sourceFile.hasNoDefaultLib) {
+                    return ts.emptyArray;
+                }
+                var typeChecker = getDiagnosticsProducingTypeChecker();
+                ts.Debug.assert(!!sourceFile.bindDiagnostics);
+                var isCheckJs = ts.isCheckJsEnabledForFile(sourceFile, options);
+                // By default, only type-check .ts, .tsx, 'Deferred' and 'External' files (external files are added by plugins)
+                var includeBindAndCheckDiagnostics = sourceFile.scriptKind === 3 /* TS */ || sourceFile.scriptKind === 4 /* TSX */ ||
+                    sourceFile.scriptKind === 5 /* External */ || isCheckJs || sourceFile.scriptKind === 7 /* Deferred */;
+                var bindDiagnostics = includeBindAndCheckDiagnostics ? sourceFile.bindDiagnostics : ts.emptyArray;
+                var checkDiagnostics = includeBindAndCheckDiagnostics ? typeChecker.getDiagnostics(sourceFile, cancellationToken) : ts.emptyArray;
+                var fileProcessingDiagnosticsInFile = fileProcessingDiagnostics.getDiagnostics(sourceFile.fileName);
+                var programDiagnosticsInFile = programDiagnostics.getDiagnostics(sourceFile.fileName);
+                var diagnostics;
+                for (var _i = 0, _a = [bindDiagnostics, checkDiagnostics, fileProcessingDiagnosticsInFile, programDiagnosticsInFile, isCheckJs ? sourceFile.jsDocDiagnostics : undefined]; _i < _a.length; _i++) {
+                    var diags = _a[_i];
+                    if (diags) {
+                        for (var _b = 0, diags_1 = diags; _b < diags_1.length; _b++) {
+                            var diag = diags_1[_b];
+                            if (shouldReportDiagnostic(diag)) {
+                                diagnostics = ts.append(diagnostics, diag);
+                            }
+                        }
+                    }
+                }
+                return diagnostics;
+            });
+        }
+        function getSuggestionDiagnostics(sourceFile, cancellationToken) {
+            return runWithCancellationToken(function () {
+                return getDiagnosticsProducingTypeChecker().getSuggestionDiagnostics(sourceFile, cancellationToken);
+            });
+        }
+        /**
+         * Skip errors if previous line start with '// @ts-ignore' comment, not counting non-empty non-comment lines
+         */
+        function shouldReportDiagnostic(diagnostic) {
+            var file = diagnostic.file, start = diagnostic.start;
+            if (file) {
+                var lineStarts = ts.getLineStarts(file);
+                var line = ts.computeLineAndCharacterOfPosition(lineStarts, start).line; // TODO: GH#18217
+                while (line > 0) {
+                    var previousLineText = file.text.slice(lineStarts[line - 1], lineStarts[line]);
+                    var result = ignoreDiagnosticCommentRegEx.exec(previousLineText);
+                    if (!result) {
+                        // non-empty line
+                        return true;
+                    }
+                    if (result[3]) {
+                        // @ts-ignore
+                        return false;
+                    }
+                    line--;
+                }
+            }
+            return true;
+        }
+        function getJavaScriptSyntacticDiagnosticsForFile(sourceFile) {
+            return runWithCancellationToken(function () {
+                var diagnostics = [];
+                var parent = sourceFile;
+                walk(sourceFile);
+                return diagnostics;
+                function walk(node) {
+                    // Return directly from the case if the given node doesnt want to visit each child
+                    // Otherwise break to visit each child
+                    switch (parent.kind) {
+                        case 149 /* Parameter */:
+                        case 152 /* PropertyDeclaration */:
+                            if (parent.questionToken === node) {
+                                diagnostics.push(createDiagnosticForNode(node, ts.Diagnostics._0_can_only_be_used_in_a_ts_file, "?"));
+                                return;
+                            }
+                        // falls through
+                        case 154 /* MethodDeclaration */:
+                        case 153 /* MethodSignature */:
+                        case 155 /* Constructor */:
+                        case 156 /* GetAccessor */:
+                        case 157 /* SetAccessor */:
+                        case 192 /* FunctionExpression */:
+                        case 234 /* FunctionDeclaration */:
+                        case 193 /* ArrowFunction */:
+                        case 232 /* VariableDeclaration */:
+                            // type annotation
+                            if (parent.type === node) {
+                                diagnostics.push(createDiagnosticForNode(node, ts.Diagnostics.types_can_only_be_used_in_a_ts_file));
+                                return;
+                            }
+                    }
+                    switch (node.kind) {
+                        case 243 /* ImportEqualsDeclaration */:
+                            diagnostics.push(createDiagnosticForNode(node, ts.Diagnostics.import_can_only_be_used_in_a_ts_file));
+                            return;
+                        case 249 /* ExportAssignment */:
+                            if (node.isExportEquals) {
+                                diagnostics.push(createDiagnosticForNode(node, ts.Diagnostics.export_can_only_be_used_in_a_ts_file));
+                                return;
+                            }
+                            break;
+                        case 268 /* HeritageClause */:
+                            var heritageClause = node;
+                            if (heritageClause.token === 108 /* ImplementsKeyword */) {
+                                diagnostics.push(createDiagnosticForNode(node, ts.Diagnostics.implements_clauses_can_only_be_used_in_a_ts_file));
+                                return;
+                            }
+                            break;
+                        case 236 /* InterfaceDeclaration */:
+                            diagnostics.push(createDiagnosticForNode(node, ts.Diagnostics.interface_declarations_can_only_be_used_in_a_ts_file));
+                            return;
+                        case 239 /* ModuleDeclaration */:
+                            diagnostics.push(createDiagnosticForNode(node, ts.Diagnostics.module_declarations_can_only_be_used_in_a_ts_file));
+                            return;
+                        case 237 /* TypeAliasDeclaration */:
+                            diagnostics.push(createDiagnosticForNode(node, ts.Diagnostics.type_aliases_can_only_be_used_in_a_ts_file));
+                            return;
+                        case 238 /* EnumDeclaration */:
+                            diagnostics.push(createDiagnosticForNode(node, ts.Diagnostics.enum_declarations_can_only_be_used_in_a_ts_file));
+                            return;
+                        case 209 /* NonNullExpression */:
+                            diagnostics.push(createDiagnosticForNode(node, ts.Diagnostics.non_null_assertions_can_only_be_used_in_a_ts_file));
+                            return;
+                        case 208 /* AsExpression */:
+                            diagnostics.push(createDiagnosticForNode(node.type, ts.Diagnostics.type_assertion_expressions_can_only_be_used_in_a_ts_file));
+                            return;
+                        case 190 /* TypeAssertionExpression */:
+                            ts.Debug.fail(); // Won't parse these in a JS file anyway, as they are interpreted as JSX.
+                    }
+                    var prevParent = parent;
+                    parent = node;
+                    ts.forEachChild(node, walk, walkArray);
+                    parent = prevParent;
+                }
+                function walkArray(nodes) {
+                    if (parent.decorators === nodes && !options.experimentalDecorators) {
+                        diagnostics.push(createDiagnosticForNode(parent, ts.Diagnostics.Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning));
+                    }
+                    switch (parent.kind) {
+                        case 235 /* ClassDeclaration */:
+                        case 154 /* MethodDeclaration */:
+                        case 153 /* MethodSignature */:
+                        case 155 /* Constructor */:
+                        case 156 /* GetAccessor */:
+                        case 157 /* SetAccessor */:
+                        case 192 /* FunctionExpression */:
+                        case 234 /* FunctionDeclaration */:
+                        case 193 /* ArrowFunction */:
+                            // Check type parameters
+                            if (nodes === parent.typeParameters) {
+                                diagnostics.push(createDiagnosticForNodeArray(nodes, ts.Diagnostics.type_parameter_declarations_can_only_be_used_in_a_ts_file));
+                                return;
+                            }
+                        // falls through
+                        case 214 /* VariableStatement */:
+                            // Check modifiers
+                            if (nodes === parent.modifiers) {
+                                return checkModifiers(nodes, parent.kind === 214 /* VariableStatement */);
+                            }
+                            break;
+                        case 152 /* PropertyDeclaration */:
+                            // Check modifiers of property declaration
+                            if (nodes === parent.modifiers) {
+                                for (var _i = 0, _a = nodes; _i < _a.length; _i++) {
+                                    var modifier = _a[_i];
+                                    if (modifier.kind !== 115 /* StaticKeyword */) {
+                                        diagnostics.push(createDiagnosticForNode(modifier, ts.Diagnostics._0_can_only_be_used_in_a_ts_file, ts.tokenToString(modifier.kind)));
+                                    }
+                                }
+                                return;
+                            }
+                            break;
+                        case 149 /* Parameter */:
+                            // Check modifiers of parameter declaration
+                            if (nodes === parent.modifiers) {
+                                diagnostics.push(createDiagnosticForNodeArray(nodes, ts.Diagnostics.parameter_modifiers_can_only_be_used_in_a_ts_file));
+                                return;
+                            }
+                            break;
+                        case 187 /* CallExpression */:
+                        case 188 /* NewExpression */:
+                        case 207 /* ExpressionWithTypeArguments */:
+                        case 256 /* JsxSelfClosingElement */:
+                        case 257 /* JsxOpeningElement */:
+                            // Check type arguments
+                            if (nodes === parent.typeArguments) {
+                                diagnostics.push(createDiagnosticForNodeArray(nodes, ts.Diagnostics.type_arguments_can_only_be_used_in_a_ts_file));
+                                return;
+                            }
+                            break;
+                    }
+                    for (var _b = 0, nodes_6 = nodes; _b < nodes_6.length; _b++) {
+                        var node = nodes_6[_b];
+                        walk(node);
+                    }
+                }
+                function checkModifiers(modifiers, isConstValid) {
+                    for (var _i = 0, modifiers_1 = modifiers; _i < modifiers_1.length; _i++) {
+                        var modifier = modifiers_1[_i];
+                        switch (modifier.kind) {
+                            case 76 /* ConstKeyword */:
+                                if (isConstValid) {
+                                    continue;
+                                }
+                            // to report error,
+                            // falls through
+                            case 114 /* PublicKeyword */:
+                            case 112 /* PrivateKeyword */:
+                            case 113 /* ProtectedKeyword */:
+                            case 132 /* ReadonlyKeyword */:
+                            case 124 /* DeclareKeyword */:
+                            case 117 /* AbstractKeyword */:
+                                diagnostics.push(createDiagnosticForNode(modifier, ts.Diagnostics._0_can_only_be_used_in_a_ts_file, ts.tokenToString(modifier.kind)));
+                                break;
+                            // These are all legal modifiers.
+                            case 115 /* StaticKeyword */:
+                            case 84 /* ExportKeyword */:
+                            case 79 /* DefaultKeyword */:
+                        }
+                    }
+                }
+                function createDiagnosticForNodeArray(nodes, message, arg0, arg1, arg2) {
+                    var start = nodes.pos;
+                    return ts.createFileDiagnostic(sourceFile, start, nodes.end - start, message, arg0, arg1, arg2);
+                }
+                // Since these are syntactic diagnostics, parent might not have been set
+                // this means the sourceFile cannot be infered from the node
+                function createDiagnosticForNode(node, message, arg0, arg1, arg2) {
+                    return ts.createDiagnosticForNodeInSourceFile(sourceFile, node, message, arg0, arg1, arg2);
+                }
+            });
+        }
+        function getDeclarationDiagnosticsWorker(sourceFile, cancellationToken) {
+            return getAndCacheDiagnostics(sourceFile, cancellationToken, cachedDeclarationDiagnosticsForFile, getDeclarationDiagnosticsForFileNoCache);
+        }
+        function getDeclarationDiagnosticsForFileNoCache(sourceFile, cancellationToken) {
+            return runWithCancellationToken(function () {
+                var resolver = getDiagnosticsProducingTypeChecker().getEmitResolver(sourceFile, cancellationToken);
+                // Don't actually write any files since we're just getting diagnostics.
+                return ts.getDeclarationDiagnostics(getEmitHost(ts.noop), resolver, sourceFile);
+            });
+        }
+        function getAndCacheDiagnostics(sourceFile, cancellationToken, cache, getDiagnostics) {
+            var cachedResult = sourceFile
+                ? cache.perFile && cache.perFile.get(sourceFile.path)
+                : cache.allDiagnostics;
+            if (cachedResult) {
+                return cachedResult;
+            }
+            var result = getDiagnostics(sourceFile, cancellationToken) || ts.emptyArray; // TODO: GH#18217
+            if (sourceFile) {
+                if (!cache.perFile) {
+                    cache.perFile = ts.createMap();
+                }
+                cache.perFile.set(sourceFile.path, result);
+            }
+            else {
+                cache.allDiagnostics = result;
+            }
+            return result;
+        }
+        function getDeclarationDiagnosticsForFile(sourceFile, cancellationToken) {
+            return sourceFile.isDeclarationFile ? [] : getDeclarationDiagnosticsWorker(sourceFile, cancellationToken);
+        }
+        function getOptionsDiagnostics() {
+            return ts.sortAndDeduplicateDiagnostics(ts.concatenate(fileProcessingDiagnostics.getGlobalDiagnostics(), ts.concatenate(programDiagnostics.getGlobalDiagnostics(), options.configFile ? programDiagnostics.getDiagnostics(options.configFile.fileName) : [])));
+        }
+        function getGlobalDiagnostics() {
+            return ts.sortAndDeduplicateDiagnostics(getDiagnosticsProducingTypeChecker().getGlobalDiagnostics().slice());
+        }
+        function getConfigFileParsingDiagnostics() {
+            return configFileParsingDiagnostics || ts.emptyArray;
+        }
+        function processRootFile(fileName, isDefaultLib, ignoreNoDefaultLib) {
+            processSourceFile(ts.normalizePath(fileName), isDefaultLib, ignoreNoDefaultLib, /*packageId*/ undefined);
+        }
+        function fileReferenceIsEqualTo(a, b) {
+            return a.fileName === b.fileName;
+        }
+        function moduleNameIsEqualTo(a, b) {
+            return a.kind === 71 /* Identifier */
+                ? b.kind === 71 /* Identifier */ && a.escapedText === b.escapedText
+                : b.kind === 9 /* StringLiteral */ && a.text === b.text;
+        }
+        function collectExternalModuleReferences(file) {
+            if (file.imports) {
+                return;
+            }
+            var isJavaScriptFile = ts.isSourceFileJavaScript(file);
+            var isExternalModuleFile = ts.isExternalModule(file);
+            // file.imports may not be undefined if there exists dynamic import
+            var imports;
+            var moduleAugmentations;
+            var ambientModules;
+            // If we are importing helpers, we need to add a synthetic reference to resolve the
+            // helpers library.
+            if (options.importHelpers
+                && (options.isolatedModules || isExternalModuleFile)
+                && !file.isDeclarationFile) {
+                // synthesize 'import "tslib"' declaration
+                var externalHelpersModuleReference = ts.createLiteral(ts.externalHelpersModuleNameText);
+                var importDecl = ts.createImportDeclaration(/*decorators*/ undefined, /*modifiers*/ undefined, /*importClause*/ undefined, externalHelpersModuleReference);
+                ts.addEmitFlags(importDecl, 67108864 /* NeverApplyImportHelper */);
+                externalHelpersModuleReference.parent = importDecl;
+                importDecl.parent = file;
+                imports = [externalHelpersModuleReference];
+            }
+            for (var _i = 0, _a = file.statements; _i < _a.length; _i++) {
+                var node = _a[_i];
+                collectModuleReferences(node, /*inAmbientModule*/ false);
+                if ((file.flags & 524288 /* PossiblyContainsDynamicImport */) || isJavaScriptFile) {
+                    collectDynamicImportOrRequireCalls(node);
+                }
+            }
+            if ((file.flags & 524288 /* PossiblyContainsDynamicImport */) || isJavaScriptFile) {
+                collectDynamicImportOrRequireCalls(file.endOfFileToken);
+            }
+            file.imports = imports || ts.emptyArray;
+            file.moduleAugmentations = moduleAugmentations || ts.emptyArray;
+            file.ambientModuleNames = ambientModules || ts.emptyArray;
+            return;
+            function collectModuleReferences(node, inAmbientModule) {
+                if (ts.isAnyImportOrReExport(node)) {
+                    var moduleNameExpr = ts.getExternalModuleName(node);
+                    // TypeScript 1.0 spec (April 2014): 12.1.6
+                    // An ExternalImportDeclaration in an AmbientExternalModuleDeclaration may reference other external modules
+                    // only through top - level external module names. Relative external module names are not permitted.
+                    if (moduleNameExpr && ts.isStringLiteral(moduleNameExpr) && moduleNameExpr.text && (!inAmbientModule || !ts.isExternalModuleNameRelative(moduleNameExpr.text))) {
+                        imports = ts.append(imports, moduleNameExpr);
+                    }
+                }
+                else if (ts.isModuleDeclaration(node)) {
+                    if (ts.isAmbientModule(node) && (inAmbientModule || ts.hasModifier(node, 2 /* Ambient */) || file.isDeclarationFile)) {
+                        var nameText = ts.getTextOfIdentifierOrLiteral(node.name);
+                        // Ambient module declarations can be interpreted as augmentations for some existing external modules.
+                        // This will happen in two cases:
+                        // - if current file is external module then module augmentation is a ambient module declaration defined in the top level scope
+                        // - if current file is not external module then module augmentation is an ambient module declaration with non-relative module name
+                        //   immediately nested in top level ambient module declaration .
+                        if (isExternalModuleFile || (inAmbientModule && !ts.isExternalModuleNameRelative(nameText))) {
+                            (moduleAugmentations || (moduleAugmentations = [])).push(node.name);
+                        }
+                        else if (!inAmbientModule) {
+                            if (file.isDeclarationFile) {
+                                // for global .d.ts files record name of ambient module
+                                (ambientModules || (ambientModules = [])).push(nameText);
+                            }
+                            // An AmbientExternalModuleDeclaration declares an external module.
+                            // This type of declaration is permitted only in the global module.
+                            // The StringLiteral must specify a top - level external module name.
+                            // Relative external module names are not permitted
+                            // NOTE: body of ambient module is always a module block, if it exists
+                            var body = node.body;
+                            if (body) {
+                                for (var _i = 0, _a = body.statements; _i < _a.length; _i++) {
+                                    var statement = _a[_i];
+                                    collectModuleReferences(statement, /*inAmbientModule*/ true);
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+            function collectDynamicImportOrRequireCalls(node) {
+                if (ts.isRequireCall(node, /*checkArgumentIsStringLiteralLike*/ true)) {
+                    imports = ts.append(imports, node.arguments[0]);
+                }
+                // we have to check the argument list has length of 1. We will still have to process these even though we have parsing error.
+                else if (ts.isImportCall(node) && node.arguments.length === 1 && ts.isStringLiteralLike(node.arguments[0])) {
+                    imports = ts.append(imports, node.arguments[0]);
+                }
+                else if (ts.isLiteralImportTypeNode(node)) {
+                    imports = ts.append(imports, node.argument.literal);
+                }
+                collectDynamicImportOrRequireCallsForEachChild(node);
+                if (ts.hasJSDocNodes(node)) {
+                    ts.forEach(node.jsDoc, collectDynamicImportOrRequireCallsForEachChild);
+                }
+            }
+            function collectDynamicImportOrRequireCallsForEachChild(node) {
+                ts.forEachChild(node, collectDynamicImportOrRequireCalls);
+            }
+        }
+        function getLibFileFromReference(ref) {
+            var libName = ref.fileName.toLocaleLowerCase();
+            var libFileName = ts.libMap.get(libName);
+            if (libFileName) {
+                return getSourceFile(ts.combinePaths(defaultLibraryPath, libFileName));
+            }
+        }
+        /** This should have similar behavior to 'processSourceFile' without diagnostics or mutation. */
+        function getSourceFileFromReference(referencingFile, ref) {
+            return getSourceFileFromReferenceWorker(resolveTripleslashReference(ref.fileName, referencingFile.fileName), function (fileName) { return filesByName.get(toPath(fileName)); });
+        }
+        function getSourceFileFromReferenceWorker(fileName, getSourceFile, fail, refFile) {
+            if (ts.hasExtension(fileName)) {
+                if (!options.allowNonTsExtensions && !ts.forEach(supportedExtensions, function (extension) { return ts.fileExtensionIs(host.getCanonicalFileName(fileName), extension); })) {
+                    if (fail)
+                        fail(ts.Diagnostics.File_0_has_unsupported_extension_The_only_supported_extensions_are_1, fileName, "'" + supportedExtensions.join("', '") + "'");
+                    return undefined;
+                }
+                var sourceFile = getSourceFile(fileName);
+                if (fail) {
+                    if (!sourceFile) {
+                        var redirect = getProjectReferenceRedirect(fileName);
+                        if (redirect) {
+                            fail(ts.Diagnostics.Output_file_0_has_not_been_built_from_source_file_1, redirect, fileName);
+                        }
+                        else {
+                            fail(ts.Diagnostics.File_0_not_found, fileName);
+                        }
+                    }
+                    else if (refFile && host.getCanonicalFileName(fileName) === host.getCanonicalFileName(refFile.fileName)) {
+                        fail(ts.Diagnostics.A_file_cannot_have_a_reference_to_itself);
+                    }
+                }
+                return sourceFile;
+            }
+            else {
+                var sourceFileNoExtension = options.allowNonTsExtensions && getSourceFile(fileName);
+                if (sourceFileNoExtension)
+                    return sourceFileNoExtension;
+                if (fail && options.allowNonTsExtensions) {
+                    fail(ts.Diagnostics.File_0_not_found, fileName);
+                    return undefined;
+                }
+                var sourceFileWithAddedExtension = ts.forEach(supportedExtensions, function (extension) { return getSourceFile(fileName + extension); });
+                if (fail && !sourceFileWithAddedExtension)
+                    fail(ts.Diagnostics.File_0_not_found, fileName + ".ts" /* Ts */);
+                return sourceFileWithAddedExtension;
+            }
+        }
+        /** This has side effects through `findSourceFile`. */
+        function processSourceFile(fileName, isDefaultLib, ignoreNoDefaultLib, packageId, refFile, refPos, refEnd) {
+            getSourceFileFromReferenceWorker(fileName, function (fileName) { return findSourceFile(fileName, toPath(fileName), isDefaultLib, ignoreNoDefaultLib, refFile, refPos, refEnd, packageId); }, // TODO: GH#18217
+            function (diagnostic) {
+                var args = [];
+                for (var _i = 1; _i < arguments.length; _i++) {
+                    args[_i - 1] = arguments[_i];
+                }
+                fileProcessingDiagnostics.add(refFile !== undefined && refEnd !== undefined && refPos !== undefined
+                    ? ts.createFileDiagnostic.apply(void 0, [refFile, refPos, refEnd - refPos, diagnostic].concat(args)) : ts.createCompilerDiagnostic.apply(void 0, [diagnostic].concat(args)));
+            }, refFile);
+        }
+        function reportFileNamesDifferOnlyInCasingError(fileName, existingFileName, refFile, refPos, refEnd) {
+            if (refFile !== undefined && refPos !== undefined && refEnd !== undefined) {
+                fileProcessingDiagnostics.add(ts.createFileDiagnostic(refFile, refPos, refEnd - refPos, ts.Diagnostics.File_name_0_differs_from_already_included_file_name_1_only_in_casing, fileName, existingFileName));
+            }
+            else {
+                fileProcessingDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.File_name_0_differs_from_already_included_file_name_1_only_in_casing, fileName, existingFileName));
+            }
+        }
+        function createRedirectSourceFile(redirectTarget, unredirected, fileName, path) {
+            var redirect = Object.create(redirectTarget);
+            redirect.fileName = fileName;
+            redirect.path = path;
+            redirect.redirectInfo = { redirectTarget: redirectTarget, unredirected: unredirected };
+            Object.defineProperties(redirect, {
+                id: {
+                    get: function () { return this.redirectInfo.redirectTarget.id; },
+                    set: function (value) { this.redirectInfo.redirectTarget.id = value; },
+                },
+                symbol: {
+                    get: function () { return this.redirectInfo.redirectTarget.symbol; },
+                    set: function (value) { this.redirectInfo.redirectTarget.symbol = value; },
+                },
+            });
+            return redirect;
+        }
+        // Get source file from normalized fileName
+        function findSourceFile(fileName, path, isDefaultLib, ignoreNoDefaultLib, refFile, refPos, refEnd, packageId) {
+            if (filesByName.has(path)) {
+                var file_1 = filesByName.get(path);
+                // try to check if we've already seen this file but with a different casing in path
+                // NOTE: this only makes sense for case-insensitive file systems
+                if (file_1 && options.forceConsistentCasingInFileNames && ts.getNormalizedAbsolutePath(file_1.fileName, currentDirectory) !== ts.getNormalizedAbsolutePath(fileName, currentDirectory)) {
+                    reportFileNamesDifferOnlyInCasingError(fileName, file_1.fileName, refFile, refPos, refEnd);
+                }
+                // If the file was previously found via a node_modules search, but is now being processed as a root file,
+                // then everything it sucks in may also be marked incorrectly, and needs to be checked again.
+                if (file_1 && sourceFilesFoundSearchingNodeModules.get(file_1.path) && currentNodeModulesDepth === 0) {
+                    sourceFilesFoundSearchingNodeModules.set(file_1.path, false);
+                    if (!options.noResolve) {
+                        processReferencedFiles(file_1, isDefaultLib);
+                        processTypeReferenceDirectives(file_1);
+                    }
+                    processLibReferenceDirectives(file_1);
+                    modulesWithElidedImports.set(file_1.path, false);
+                    processImportedModules(file_1);
+                }
+                // See if we need to reprocess the imports due to prior skipped imports
+                else if (file_1 && modulesWithElidedImports.get(file_1.path)) {
+                    if (currentNodeModulesDepth < maxNodeModuleJsDepth) {
+                        modulesWithElidedImports.set(file_1.path, false);
+                        processImportedModules(file_1);
+                    }
+                }
+                return file_1;
+            }
+            var redirectedPath;
+            if (refFile) {
+                var redirect = getProjectReferenceRedirect(fileName);
+                if (redirect) {
+                    (refFile.redirectedReferences || (refFile.redirectedReferences = [])).push(fileName);
+                    fileName = redirect;
+                    // Once we start redirecting to a file, we can potentially come back to it
+                    // via a back-reference from another file in the .d.ts folder. If that happens we'll
+                    // end up trying to add it to the program *again* because we were tracking it via its
+                    // original (un-redirected) name. So we have to map both the original path and the redirected path
+                    // to the source file we're about to find/create
+                    redirectedPath = toPath(redirect);
+                }
+            }
+            // We haven't looked for this file, do so now and cache result
+            var file = host.getSourceFile(fileName, options.target, function (hostErrorMessage) {
+                if (refFile !== undefined && refPos !== undefined && refEnd !== undefined) {
+                    fileProcessingDiagnostics.add(ts.createFileDiagnostic(refFile, refPos, refEnd - refPos, ts.Diagnostics.Cannot_read_file_0_Colon_1, fileName, hostErrorMessage));
+                }
+                else {
+                    fileProcessingDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_read_file_0_Colon_1, fileName, hostErrorMessage));
+                }
+            }, shouldCreateNewSourceFile);
+            if (packageId) {
+                var packageIdKey = ts.packageIdToString(packageId);
+                var fileFromPackageId = packageIdToSourceFile.get(packageIdKey);
+                if (fileFromPackageId) {
+                    // Some other SourceFile already exists with this package name and version.
+                    // Instead of creating a duplicate, just redirect to the existing one.
+                    var dupFile = createRedirectSourceFile(fileFromPackageId, file, fileName, path); // TODO: GH#18217
+                    redirectTargetsSet.set(fileFromPackageId.path, true);
+                    filesByName.set(path, dupFile);
+                    sourceFileToPackageName.set(path, packageId.name);
+                    processingOtherFiles.push(dupFile);
+                    return dupFile;
+                }
+                else if (file) {
+                    // This is the first source file to have this packageId.
+                    packageIdToSourceFile.set(packageIdKey, file);
+                    sourceFileToPackageName.set(path, packageId.name);
+                }
+            }
+            filesByName.set(path, file);
+            if (redirectedPath) {
+                filesByName.set(redirectedPath, file);
+            }
+            if (file) {
+                sourceFilesFoundSearchingNodeModules.set(path, currentNodeModulesDepth > 0);
+                file.path = path;
+                file.resolvedPath = toPath(fileName);
+                if (host.useCaseSensitiveFileNames()) {
+                    var pathLowerCase = path.toLowerCase();
+                    // for case-sensitive file systems check if we've already seen some file with similar filename ignoring case
+                    var existingFile = filesByNameIgnoreCase.get(pathLowerCase);
+                    if (existingFile) {
+                        reportFileNamesDifferOnlyInCasingError(fileName, existingFile.fileName, refFile, refPos, refEnd);
+                    }
+                    else {
+                        filesByNameIgnoreCase.set(pathLowerCase, file);
+                    }
+                }
+                skipDefaultLib = skipDefaultLib || (file.hasNoDefaultLib && !ignoreNoDefaultLib);
+                if (!options.noResolve) {
+                    processReferencedFiles(file, isDefaultLib);
+                    processTypeReferenceDirectives(file);
+                }
+                processLibReferenceDirectives(file);
+                // always process imported modules to record module name resolutions
+                processImportedModules(file);
+                if (isDefaultLib) {
+                    processingDefaultLibFiles.push(file);
+                }
+                else {
+                    processingOtherFiles.push(file);
+                }
+            }
+            return file;
+        }
+        function getProjectReferenceRedirect(fileName) {
+            var path = toPath(fileName);
+            // If this file is produced by a referenced project, we need to rewrite it to
+            // look in the output folder of the referenced project rather than the input
+            var normalized = ts.getNormalizedAbsolutePath(fileName, path);
+            var result;
+            projectReferenceRedirects.forEach(function (v, k) {
+                if (result !== undefined) {
+                    return undefined;
+                }
+                if (normalized.indexOf(k) === 0) {
+                    result = ts.changeExtension(fileName.replace(k, v), ".d.ts");
+                }
+            });
+            return result;
+        }
+        function processReferencedFiles(file, isDefaultLib) {
+            ts.forEach(file.referencedFiles, function (ref) {
+                var referencedFileName = resolveTripleslashReference(ref.fileName, file.fileName);
+                processSourceFile(referencedFileName, isDefaultLib, /*ignoreNoDefaultLib*/ false, /*packageId*/ undefined, file, ref.pos, ref.end);
+            });
+        }
+        function processTypeReferenceDirectives(file) {
+            // We lower-case all type references because npm automatically lowercases all packages. See GH#9824.
+            var typeDirectives = ts.map(file.typeReferenceDirectives, function (ref) { return ref.fileName.toLocaleLowerCase(); });
+            if (!typeDirectives) {
+                return;
+            }
+            var resolutions = resolveTypeReferenceDirectiveNamesWorker(typeDirectives, file.fileName);
+            for (var i = 0; i < typeDirectives.length; i++) {
+                var ref = file.typeReferenceDirectives[i];
+                var resolvedTypeReferenceDirective = resolutions[i];
+                // store resolved type directive on the file
+                var fileName = ref.fileName.toLocaleLowerCase();
+                ts.setResolvedTypeReferenceDirective(file, fileName, resolvedTypeReferenceDirective);
+                processTypeReferenceDirective(fileName, resolvedTypeReferenceDirective, file, ref.pos, ref.end);
+            }
+        }
+        function processTypeReferenceDirective(typeReferenceDirective, resolvedTypeReferenceDirective, refFile, refPos, refEnd) {
+            // If we already found this library as a primary reference - nothing to do
+            var previousResolution = resolvedTypeReferenceDirectives.get(typeReferenceDirective);
+            if (previousResolution && previousResolution.primary) {
+                return;
+            }
+            var saveResolution = true;
+            if (resolvedTypeReferenceDirective) {
+                if (resolvedTypeReferenceDirective.primary) {
+                    // resolved from the primary path
+                    processSourceFile(resolvedTypeReferenceDirective.resolvedFileName, /*isDefaultLib*/ false, /*ignoreNoDefaultLib*/ false, resolvedTypeReferenceDirective.packageId, refFile, refPos, refEnd); // TODO: GH#18217
+                }
+                else {
+                    // If we already resolved to this file, it must have been a secondary reference. Check file contents
+                    // for sameness and possibly issue an error
+                    if (previousResolution) {
+                        // Don't bother reading the file again if it's the same file.
+                        if (resolvedTypeReferenceDirective.resolvedFileName !== previousResolution.resolvedFileName) {
+                            var otherFileText = host.readFile(resolvedTypeReferenceDirective.resolvedFileName);
+                            if (otherFileText !== getSourceFile(previousResolution.resolvedFileName).text) {
+                                fileProcessingDiagnostics.add(createDiagnostic(refFile, refPos, refEnd, // TODO: GH#18217
+                                ts.Diagnostics.Conflicting_definitions_for_0_found_at_1_and_2_Consider_installing_a_specific_version_of_this_library_to_resolve_the_conflict, typeReferenceDirective, resolvedTypeReferenceDirective.resolvedFileName, previousResolution.resolvedFileName));
+                            }
+                        }
+                        // don't overwrite previous resolution result
+                        saveResolution = false;
+                    }
+                    else {
+                        // First resolution of this library
+                        processSourceFile(resolvedTypeReferenceDirective.resolvedFileName, /*isDefaultLib*/ false, /*ignoreNoDefaultLib*/ false, resolvedTypeReferenceDirective.packageId, refFile, refPos, refEnd);
+                    }
+                }
+            }
+            else {
+                fileProcessingDiagnostics.add(createDiagnostic(refFile, refPos, refEnd, ts.Diagnostics.Cannot_find_type_definition_file_for_0, typeReferenceDirective)); // TODO: GH#18217
+            }
+            if (saveResolution) {
+                resolvedTypeReferenceDirectives.set(typeReferenceDirective, resolvedTypeReferenceDirective);
+            }
+        }
+        function processLibReferenceDirectives(file) {
+            ts.forEach(file.libReferenceDirectives, function (libReference) {
+                var libName = libReference.fileName.toLocaleLowerCase();
+                var libFileName = ts.libMap.get(libName);
+                if (libFileName) {
+                    // we ignore any 'no-default-lib' reference set on this file.
+                    processRootFile(ts.combinePaths(defaultLibraryPath, libFileName), /*isDefaultLib*/ true, /*ignoreNoDefaultLib*/ true);
+                }
+                else {
+                    var unqualifiedLibName = ts.removeSuffix(ts.removePrefix(libName, "lib."), ".d.ts");
+                    var suggestion = ts.getSpellingSuggestion(unqualifiedLibName, ts.libs, ts.identity);
+                    var message = suggestion ? ts.Diagnostics.Cannot_find_lib_definition_for_0_Did_you_mean_1 : ts.Diagnostics.Cannot_find_lib_definition_for_0;
+                    fileProcessingDiagnostics.add(createDiagnostic(file, libReference.pos, libReference.end, message, libName, suggestion));
+                }
+            });
+        }
+        function createDiagnostic(refFile, refPos, refEnd, message) {
+            var args = [];
+            for (var _i = 4; _i < arguments.length; _i++) {
+                args[_i - 4] = arguments[_i];
+            }
+            if (refFile === undefined || refPos === undefined || refEnd === undefined) {
+                return ts.createCompilerDiagnostic.apply(void 0, [message].concat(args));
+            }
+            else {
+                return ts.createFileDiagnostic.apply(void 0, [refFile, refPos, refEnd - refPos, message].concat(args));
+            }
+        }
+        function getCanonicalFileName(fileName) {
+            return host.getCanonicalFileName(fileName);
+        }
+        function processImportedModules(file) {
+            collectExternalModuleReferences(file);
+            if (file.imports.length || file.moduleAugmentations.length) {
+                // Because global augmentation doesn't have string literal name, we can check for global augmentation as such.
+                var moduleNames = getModuleNames(file);
+                var oldProgramState = { program: oldProgram, oldSourceFile: oldProgram && oldProgram.getSourceFile(file.fileName), modifiedFilePaths: modifiedFilePaths };
+                var resolutions = resolveModuleNamesReusingOldState(moduleNames, ts.getNormalizedAbsolutePath(file.fileName, currentDirectory), file, oldProgramState);
+                ts.Debug.assert(resolutions.length === moduleNames.length);
+                for (var i = 0; i < moduleNames.length; i++) {
+                    var resolution = resolutions[i];
+                    ts.setResolvedModule(file, moduleNames[i], resolution);
+                    if (!resolution) {
+                        continue;
+                    }
+                    var isFromNodeModulesSearch = resolution.isExternalLibraryImport;
+                    var isJsFile = !ts.resolutionExtensionIsTypeScriptOrJson(resolution.extension);
+                    var isJsFileFromNodeModules = isFromNodeModulesSearch && isJsFile;
+                    var resolvedFileName = resolution.resolvedFileName;
+                    if (isFromNodeModulesSearch) {
+                        currentNodeModulesDepth++;
+                    }
+                    // add file to program only if:
+                    // - resolution was successful
+                    // - noResolve is falsy
+                    // - module name comes from the list of imports
+                    // - it's not a top level JavaScript module that exceeded the search max
+                    var elideImport = isJsFileFromNodeModules && currentNodeModulesDepth > maxNodeModuleJsDepth;
+                    // Don't add the file if it has a bad extension (e.g. 'tsx' if we don't have '--allowJs')
+                    // This may still end up being an untyped module -- the file won't be included but imports will be allowed.
+                    var shouldAddFile = resolvedFileName
+                        && !getResolutionDiagnostic(options, resolution)
+                        && !options.noResolve
+                        && i < file.imports.length
+                        && !elideImport
+                        && !(isJsFile && !options.allowJs)
+                        && (ts.isInJavaScriptFile(file.imports[i]) || !(file.imports[i].flags & 2097152 /* JSDoc */));
+                    if (elideImport) {
+                        modulesWithElidedImports.set(file.path, true);
+                    }
+                    else if (shouldAddFile) {
+                        var path = toPath(resolvedFileName);
+                        var pos = ts.skipTrivia(file.text, file.imports[i].pos);
+                        findSourceFile(resolvedFileName, path, /*isDefaultLib*/ false, /*ignoreNoDefaultLib*/ false, file, pos, file.imports[i].end, resolution.packageId);
+                    }
+                    if (isFromNodeModulesSearch) {
+                        currentNodeModulesDepth--;
+                    }
+                }
+            }
+            else {
+                // no imports - drop cached module resolutions
+                file.resolvedModules = undefined;
+            }
+        }
+        function computeCommonSourceDirectory(sourceFiles) {
+            var fileNames = [];
+            for (var _i = 0, sourceFiles_2 = sourceFiles; _i < sourceFiles_2.length; _i++) {
+                var file = sourceFiles_2[_i];
+                if (!file.isDeclarationFile) {
+                    fileNames.push(file.fileName);
+                }
+            }
+            return computeCommonSourceDirectoryOfFilenames(fileNames, currentDirectory, getCanonicalFileName);
+        }
+        function checkSourceFilesBelongToPath(sourceFiles, rootDirectory) {
+            var allFilesBelongToPath = true;
+            if (sourceFiles) {
+                var absoluteRootDirectoryPath = host.getCanonicalFileName(ts.getNormalizedAbsolutePath(rootDirectory, currentDirectory));
+                for (var _i = 0, sourceFiles_3 = sourceFiles; _i < sourceFiles_3.length; _i++) {
+                    var sourceFile = sourceFiles_3[_i];
+                    if (!sourceFile.isDeclarationFile) {
+                        var absoluteSourceFilePath = host.getCanonicalFileName(ts.getNormalizedAbsolutePath(sourceFile.fileName, currentDirectory));
+                        if (absoluteSourceFilePath.indexOf(absoluteRootDirectoryPath) !== 0) {
+                            programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.File_0_is_not_under_rootDir_1_rootDir_is_expected_to_contain_all_source_files, sourceFile.fileName, options.rootDir));
+                            allFilesBelongToPath = false;
+                        }
+                    }
+                }
+            }
+            return allFilesBelongToPath;
+        }
+        function parseProjectReferenceConfigFile(ref) {
+            // The actual filename (i.e. add "/tsconfig.json" if necessary)
+            var refPath = resolveProjectReferencePath(host, ref); // TODO: GH#18217
+            // An absolute path pointing to the containing directory of the config file
+            var basePath = ts.getNormalizedAbsolutePath(ts.getDirectoryPath(refPath), host.getCurrentDirectory());
+            var sourceFile = host.getSourceFile(refPath, 100 /* JSON */);
+            if (sourceFile === undefined) {
+                return undefined;
+            }
+            var commandLine = ts.parseJsonSourceFileConfigFileContent(sourceFile, configParsingHost, basePath, /*existingOptions*/ undefined, refPath);
+            return { commandLine: commandLine, sourceFile: sourceFile };
+        }
+        function addProjectReferenceRedirects(referencedProject, target) {
+            var rootDir = ts.normalizePath(referencedProject.options.rootDir || ts.getDirectoryPath(referencedProject.options.configFilePath)); // TODO: GH#18217
+            target.set(rootDir, getDeclarationOutputDirectory(referencedProject));
+        }
+        function getDeclarationOutputDirectory(proj) {
+            return proj.options.declarationDir ||
+                proj.options.outDir ||
+                ts.getDirectoryPath(proj.options.configFilePath); // TODO: GH#18217
+        }
+        function verifyCompilerOptions() {
+            if (options.strictPropertyInitialization && !options.strictNullChecks) {
+                createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "strictPropertyInitialization", "strictNullChecks");
+            }
+            if (options.isolatedModules) {
+                if (options.declaration) {
+                    createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "declaration", "isolatedModules");
+                }
+                if (options.noEmitOnError) {
+                    createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "noEmitOnError", "isolatedModules");
+                }
+                if (options.out) {
+                    createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "out", "isolatedModules");
+                }
+                if (options.outFile) {
+                    createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "outFile", "isolatedModules");
+                }
+            }
+            if (options.inlineSourceMap) {
+                if (options.sourceMap) {
+                    createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "sourceMap", "inlineSourceMap");
+                }
+                if (options.mapRoot) {
+                    createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "mapRoot", "inlineSourceMap");
+                }
+            }
+            if (options.paths && options.baseUrl === undefined) {
+                createDiagnosticForOptionName(ts.Diagnostics.Option_paths_cannot_be_used_without_specifying_baseUrl_option, "paths");
+            }
+            if (options.composite) {
+                if (options.declaration === false) {
+                    createDiagnosticForOptionName(ts.Diagnostics.Composite_projects_may_not_disable_declaration_emit, "declaration");
+                }
+            }
+            if (projectReferences) {
+                for (var i = 0; i < projectReferences.length; i++) {
+                    var ref = projectReferences[i];
+                    var resolvedRefOpts = resolvedProjectReferences[i] && resolvedProjectReferences[i].commandLine.options;
+                    if (resolvedRefOpts === undefined) {
+                        createDiagnosticForReference(i, ts.Diagnostics.File_0_does_not_exist, ref.path);
+                        continue;
+                    }
+                    if (!resolvedRefOpts.composite) {
+                        createDiagnosticForReference(i, ts.Diagnostics.Referenced_project_0_must_have_setting_composite_Colon_true, ref.path);
+                    }
+                    if (ref.prepend) {
+                        if (resolvedRefOpts.outFile) {
+                            if (!host.fileExists(resolvedRefOpts.outFile)) {
+                                createDiagnosticForReference(i, ts.Diagnostics.Output_file_0_from_project_1_does_not_exist, resolvedRefOpts.outFile, ref.path);
+                            }
+                        }
+                        else {
+                            createDiagnosticForReference(i, ts.Diagnostics.Cannot_prepend_project_0_because_it_does_not_have_outFile_set, ref.path);
+                        }
+                    }
+                }
+            }
+            // List of collected files is complete; validate exhautiveness if this is a project with a file list
+            if (options.composite && rootNames.length < files.length) {
+                var normalizedRootNames = rootNames.map(function (r) { return ts.normalizePath(r).toLowerCase(); });
+                var sourceFiles = files.filter(function (f) { return !f.isDeclarationFile; }).map(function (f) { return ts.normalizePath(f.path).toLowerCase(); });
+                var _loop_11 = function (file) {
+                    if (normalizedRootNames.every(function (r) { return r !== file; })) {
+                        programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.File_0_is_not_in_project_file_list_Projects_must_list_all_files_or_use_an_include_pattern, file));
+                    }
+                };
+                for (var _i = 0, sourceFiles_4 = sourceFiles; _i < sourceFiles_4.length; _i++) {
+                    var file = sourceFiles_4[_i];
+                    _loop_11(file);
+                }
+            }
+            if (options.paths) {
+                for (var key in options.paths) {
+                    if (!ts.hasProperty(options.paths, key)) {
+                        continue;
+                    }
+                    if (!ts.hasZeroOrOneAsteriskCharacter(key)) {
+                        createDiagnosticForOptionPaths(/*onKey*/ true, key, ts.Diagnostics.Pattern_0_can_have_at_most_one_Asterisk_character, key);
+                    }
+                    if (ts.isArray(options.paths[key])) {
+                        var len = options.paths[key].length;
+                        if (len === 0) {
+                            createDiagnosticForOptionPaths(/*onKey*/ false, key, ts.Diagnostics.Substitutions_for_pattern_0_shouldn_t_be_an_empty_array, key);
+                        }
+                        for (var i = 0; i < len; i++) {
+                            var subst = options.paths[key][i];
+                            var typeOfSubst = typeof subst;
+                            if (typeOfSubst === "string") {
+                                if (!ts.hasZeroOrOneAsteriskCharacter(subst)) {
+                                    createDiagnosticForOptionPathKeyValue(key, i, ts.Diagnostics.Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character, subst, key);
+                                }
+                            }
+                            else {
+                                createDiagnosticForOptionPathKeyValue(key, i, ts.Diagnostics.Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2, subst, key, typeOfSubst);
+                            }
+                        }
+                    }
+                    else {
+                        createDiagnosticForOptionPaths(/*onKey*/ false, key, ts.Diagnostics.Substitutions_for_pattern_0_should_be_an_array, key);
+                    }
+                }
+            }
+            if (!options.sourceMap && !options.inlineSourceMap) {
+                if (options.inlineSources) {
+                    createDiagnosticForOptionName(ts.Diagnostics.Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided, "inlineSources");
+                }
+                if (options.sourceRoot) {
+                    createDiagnosticForOptionName(ts.Diagnostics.Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided, "sourceRoot");
+                }
+            }
+            if (options.out && options.outFile) {
+                createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "out", "outFile");
+            }
+            if (options.mapRoot && !(options.sourceMap || options.declarationMap)) {
+                // Error to specify --mapRoot without --sourcemap
+                createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1_or_option_2, "mapRoot", "sourceMap", "declarationMap");
+            }
+            if (options.declarationDir) {
+                if (!options.declaration) {
+                    createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "declarationDir", "declaration");
+                }
+                if (options.out || options.outFile) {
+                    createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "declarationDir", options.out ? "out" : "outFile");
+                }
+            }
+            if (options.declarationMap && !options.declaration) {
+                createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "declarationMap", "declaration");
+            }
+            if (options.lib && options.noLib) {
+                createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "lib", "noLib");
+            }
+            if (options.noImplicitUseStrict && ts.getStrictOptionValue(options, "alwaysStrict")) {
+                createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "noImplicitUseStrict", "alwaysStrict");
+            }
+            var languageVersion = options.target || 0 /* ES3 */;
+            var outFile = options.outFile || options.out;
+            var firstNonAmbientExternalModuleSourceFile = ts.forEach(files, function (f) { return ts.isExternalModule(f) && !f.isDeclarationFile ? f : undefined; });
+            if (options.isolatedModules) {
+                if (options.module === ts.ModuleKind.None && languageVersion < 2 /* ES2015 */) {
+                    createDiagnosticForOptionName(ts.Diagnostics.Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES2015_or_higher, "isolatedModules", "target");
+                }
+                var firstNonExternalModuleSourceFile = ts.forEach(files, function (f) { return !ts.isExternalModule(f) && !f.isDeclarationFile ? f : undefined; });
+                if (firstNonExternalModuleSourceFile) {
+                    var span = ts.getErrorSpanForNode(firstNonExternalModuleSourceFile, firstNonExternalModuleSourceFile);
+                    programDiagnostics.add(ts.createFileDiagnostic(firstNonExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided));
+                }
+            }
+            else if (firstNonAmbientExternalModuleSourceFile && languageVersion < 2 /* ES2015 */ && options.module === ts.ModuleKind.None) {
+                // We cannot use createDiagnosticFromNode because nodes do not have parents yet
+                var span = ts.getErrorSpanForNode(firstNonAmbientExternalModuleSourceFile, firstNonAmbientExternalModuleSourceFile.externalModuleIndicator);
+                programDiagnostics.add(ts.createFileDiagnostic(firstNonAmbientExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_use_imports_exports_or_module_augmentations_when_module_is_none));
+            }
+            // Cannot specify module gen that isn't amd or system with --out
+            if (outFile) {
+                if (options.module && !(options.module === ts.ModuleKind.AMD || options.module === ts.ModuleKind.System)) {
+                    createDiagnosticForOptionName(ts.Diagnostics.Only_amd_and_system_modules_are_supported_alongside_0, options.out ? "out" : "outFile", "module");
+                }
+                else if (options.module === undefined && firstNonAmbientExternalModuleSourceFile) {
+                    var span = ts.getErrorSpanForNode(firstNonAmbientExternalModuleSourceFile, firstNonAmbientExternalModuleSourceFile.externalModuleIndicator);
+                    programDiagnostics.add(ts.createFileDiagnostic(firstNonAmbientExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system, options.out ? "out" : "outFile"));
+                }
+            }
+            if (options.resolveJsonModule) {
+                if (ts.getEmitModuleResolutionKind(options) !== ts.ModuleResolutionKind.NodeJs) {
+                    createDiagnosticForOptionName(ts.Diagnostics.Option_resolveJsonModule_cannot_be_specified_without_node_module_resolution_strategy, "resolveJsonModule");
+                }
+            }
+            // there has to be common source directory if user specified --outdir || --sourceRoot
+            // if user specified --mapRoot, there needs to be common source directory if there would be multiple files being emitted
+            if (options.outDir || // there is --outDir specified
+                options.sourceRoot || // there is --sourceRoot specified
+                options.mapRoot) { // there is --mapRoot specified
+                // Precalculate and cache the common source directory
+                var dir = getCommonSourceDirectory();
+                // If we failed to find a good common directory, but outDir is specified and at least one of our files is on a windows drive/URL/other resource, add a failure
+                if (options.outDir && dir === "" && ts.forEach(files, function (file) { return ts.getRootLength(file.fileName) > 1; })) {
+                    createDiagnosticForOptionName(ts.Diagnostics.Cannot_find_the_common_subdirectory_path_for_the_input_files, "outDir");
+                }
+            }
+            if (!options.noEmit && options.allowJs && options.declaration) {
+                createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "allowJs", "declaration");
+            }
+            if (options.checkJs && !options.allowJs) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "checkJs", "allowJs"));
+            }
+            if (options.emitDeclarationOnly) {
+                if (!options.declaration) {
+                    createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "emitDeclarationOnly", "declaration");
+                }
+                if (options.noEmit) {
+                    createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "emitDeclarationOnly", "noEmit");
+                }
+            }
+            if (options.emitDecoratorMetadata &&
+                !options.experimentalDecorators) {
+                createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "emitDecoratorMetadata", "experimentalDecorators");
+            }
+            if (options.jsxFactory) {
+                if (options.reactNamespace) {
+                    createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "reactNamespace", "jsxFactory");
+                }
+                if (!ts.parseIsolatedEntityName(options.jsxFactory, languageVersion)) {
+                    createOptionValueDiagnostic("jsxFactory", ts.Diagnostics.Invalid_value_for_jsxFactory_0_is_not_a_valid_identifier_or_qualified_name, options.jsxFactory);
+                }
+            }
+            else if (options.reactNamespace && !ts.isIdentifierText(options.reactNamespace, languageVersion)) {
+                createOptionValueDiagnostic("reactNamespace", ts.Diagnostics.Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier, options.reactNamespace);
+            }
+            // If the emit is enabled make sure that every output file is unique and not overwriting any of the input files
+            if (!options.noEmit && !options.suppressOutputPathCheck) {
+                var emitHost = getEmitHost();
+                var emitFilesSeen_1 = ts.createMap();
+                ts.forEachEmittedFile(emitHost, function (emitFileNames) {
+                    if (!options.emitDeclarationOnly) {
+                        verifyEmitFilePath(emitFileNames.jsFilePath, emitFilesSeen_1);
+                    }
+                    verifyEmitFilePath(emitFileNames.declarationFilePath, emitFilesSeen_1);
+                });
+            }
+            // Verify that all the emit files are unique and don't overwrite input files
+            function verifyEmitFilePath(emitFileName, emitFilesSeen) {
+                if (emitFileName) {
+                    var emitFilePath = toPath(emitFileName);
+                    // Report error if the output overwrites input file
+                    if (filesByName.has(emitFilePath)) {
+                        var chain_2;
+                        if (!options.configFilePath) {
+                            // The program is from either an inferred project or an external project
+                            chain_2 = ts.chainDiagnosticMessages(/*details*/ undefined, ts.Diagnostics.Adding_a_tsconfig_json_file_will_help_organize_projects_that_contain_both_TypeScript_and_JavaScript_files_Learn_more_at_https_Colon_Slash_Slashaka_ms_Slashtsconfig);
+                        }
+                        chain_2 = ts.chainDiagnosticMessages(chain_2, ts.Diagnostics.Cannot_write_file_0_because_it_would_overwrite_input_file, emitFileName);
+                        blockEmittingOfFile(emitFileName, ts.createCompilerDiagnosticFromMessageChain(chain_2));
+                    }
+                    var emitFileKey = !host.useCaseSensitiveFileNames() ? emitFilePath.toLocaleLowerCase() : emitFilePath;
+                    // Report error if multiple files write into same file
+                    if (emitFilesSeen.has(emitFileKey)) {
+                        // Already seen the same emit file - report error
+                        blockEmittingOfFile(emitFileName, ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files, emitFileName));
+                    }
+                    else {
+                        emitFilesSeen.set(emitFileKey, true);
+                    }
+                }
+            }
+        }
+        function createDiagnosticForOptionPathKeyValue(key, valueIndex, message, arg0, arg1, arg2) {
+            var needCompilerDiagnostic = true;
+            var pathsSyntax = getOptionPathsSyntax();
+            for (var _i = 0, pathsSyntax_1 = pathsSyntax; _i < pathsSyntax_1.length; _i++) {
+                var pathProp = pathsSyntax_1[_i];
+                if (ts.isObjectLiteralExpression(pathProp.initializer)) {
+                    for (var _a = 0, _b = ts.getPropertyAssignment(pathProp.initializer, key); _a < _b.length; _a++) {
+                        var keyProps = _b[_a];
+                        var initializer = keyProps.initializer;
+                        if (ts.isArrayLiteralExpression(initializer) && initializer.elements.length > valueIndex) {
+                            programDiagnostics.add(ts.createDiagnosticForNodeInSourceFile(options.configFile, initializer.elements[valueIndex], message, arg0, arg1, arg2));
+                            needCompilerDiagnostic = false;
+                        }
+                    }
+                }
+            }
+            if (needCompilerDiagnostic) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(message, arg0, arg1, arg2));
+            }
+        }
+        function createDiagnosticForOptionPaths(onKey, key, message, arg0) {
+            var needCompilerDiagnostic = true;
+            var pathsSyntax = getOptionPathsSyntax();
+            for (var _i = 0, pathsSyntax_2 = pathsSyntax; _i < pathsSyntax_2.length; _i++) {
+                var pathProp = pathsSyntax_2[_i];
+                if (ts.isObjectLiteralExpression(pathProp.initializer) &&
+                    createOptionDiagnosticInObjectLiteralSyntax(pathProp.initializer, onKey, key, /*key2*/ undefined, message, arg0)) {
+                    needCompilerDiagnostic = false;
+                }
+            }
+            if (needCompilerDiagnostic) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(message, arg0));
+            }
+        }
+        function getOptionsSyntaxByName(name) {
+            var compilerOptionsObjectLiteralSyntax = getCompilerOptionsObjectLiteralSyntax();
+            if (compilerOptionsObjectLiteralSyntax) {
+                return ts.getPropertyAssignment(compilerOptionsObjectLiteralSyntax, name);
+            }
+            return undefined;
+        }
+        function getOptionPathsSyntax() {
+            return getOptionsSyntaxByName("paths") || ts.emptyArray;
+        }
+        function createDiagnosticForOptionName(message, option1, option2, option3) {
+            createDiagnosticForOption(/*onKey*/ true, option1, option2, message, option1, option2, option3);
+        }
+        function createOptionValueDiagnostic(option1, message, arg0) {
+            createDiagnosticForOption(/*onKey*/ false, option1, /*option2*/ undefined, message, arg0);
+        }
+        function createDiagnosticForReference(index, message, arg0, arg1) {
+            var referencesSyntax = getProjectReferencesSyntax();
+            if (referencesSyntax) {
+                if (createOptionDiagnosticInArrayLiteralSyntax(referencesSyntax, index, message, arg0, arg1)) {
+                    return;
+                }
+            }
+            programDiagnostics.add(ts.createCompilerDiagnostic(message, arg0, arg1));
+        }
+        function createDiagnosticForOption(onKey, option1, option2, message, arg0, arg1, arg2) {
+            var compilerOptionsObjectLiteralSyntax = getCompilerOptionsObjectLiteralSyntax();
+            var needCompilerDiagnostic = !compilerOptionsObjectLiteralSyntax ||
+                !createOptionDiagnosticInObjectLiteralSyntax(compilerOptionsObjectLiteralSyntax, onKey, option1, option2, message, arg0, arg1, arg2);
+            if (needCompilerDiagnostic) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(message, arg0, arg1, arg2));
+            }
+        }
+        function getProjectReferencesSyntax() {
+            if (_referencesArrayLiteralSyntax === undefined) {
+                _referencesArrayLiteralSyntax = null; // tslint:disable-line:no-null-keyword
+                if (options.configFile) {
+                    var jsonObjectLiteral = ts.getTsConfigObjectLiteralExpression(options.configFile); // TODO: GH#18217
+                    for (var _i = 0, _a = ts.getPropertyAssignment(jsonObjectLiteral, "references"); _i < _a.length; _i++) {
+                        var prop = _a[_i];
+                        if (ts.isArrayLiteralExpression(prop.initializer)) {
+                            _referencesArrayLiteralSyntax = prop.initializer;
+                            break;
+                        }
+                    }
+                }
+            }
+            return _referencesArrayLiteralSyntax;
+        }
+        function getCompilerOptionsObjectLiteralSyntax() {
+            if (_compilerOptionsObjectLiteralSyntax === undefined) {
+                _compilerOptionsObjectLiteralSyntax = null; // tslint:disable-line:no-null-keyword
+                var jsonObjectLiteral = ts.getTsConfigObjectLiteralExpression(options.configFile);
+                if (jsonObjectLiteral) {
+                    for (var _i = 0, _a = ts.getPropertyAssignment(jsonObjectLiteral, "compilerOptions"); _i < _a.length; _i++) {
+                        var prop = _a[_i];
+                        if (ts.isObjectLiteralExpression(prop.initializer)) {
+                            _compilerOptionsObjectLiteralSyntax = prop.initializer;
+                            break;
+                        }
+                    }
+                }
+            }
+            return _compilerOptionsObjectLiteralSyntax;
+        }
+        function createOptionDiagnosticInObjectLiteralSyntax(objectLiteral, onKey, key1, key2, message, arg0, arg1, arg2) {
+            var props = ts.getPropertyAssignment(objectLiteral, key1, key2);
+            for (var _i = 0, props_2 = props; _i < props_2.length; _i++) {
+                var prop = props_2[_i];
+                programDiagnostics.add(ts.createDiagnosticForNodeInSourceFile(options.configFile, onKey ? prop.name : prop.initializer, message, arg0, arg1, arg2));
+            }
+            return !!props.length;
+        }
+        function createOptionDiagnosticInArrayLiteralSyntax(arrayLiteral, index, message, arg0, arg1, arg2) {
+            if (arrayLiteral.elements.length <= index) {
+                // Out-of-bounds
+                return false;
+            }
+            programDiagnostics.add(ts.createDiagnosticForNodeInSourceFile(options.configFile, arrayLiteral.elements[index], message, arg0, arg1, arg2));
+            return false; // TODO: GH#18217 This function always returns `false`!`
+        }
+        function blockEmittingOfFile(emitFileName, diag) {
+            hasEmitBlockingDiagnostics.set(toPath(emitFileName), true);
+            programDiagnostics.add(diag);
+        }
+        function isEmittedFile(file) {
+            if (options.noEmit) {
+                return false;
+            }
+            // If this is source file, its not emitted file
+            var filePath = toPath(file);
+            if (getSourceFileByPath(filePath)) {
+                return false;
+            }
+            // If options have --outFile or --out just check that
+            var out = options.outFile || options.out;
+            if (out) {
+                return isSameFile(filePath, out) || isSameFile(filePath, ts.removeFileExtension(out) + ".d.ts" /* Dts */);
+            }
+            // If declarationDir is specified, return if its a file in that directory
+            if (options.declarationDir && ts.containsPath(options.declarationDir, filePath, currentDirectory, !host.useCaseSensitiveFileNames())) {
+                return true;
+            }
+            // If --outDir, check if file is in that directory
+            if (options.outDir) {
+                return ts.containsPath(options.outDir, filePath, currentDirectory, !host.useCaseSensitiveFileNames());
+            }
+            if (ts.fileExtensionIsOneOf(filePath, ts.supportedJavascriptExtensions) || ts.fileExtensionIs(filePath, ".d.ts" /* Dts */)) {
+                // Otherwise just check if sourceFile with the name exists
+                var filePathWithoutExtension = ts.removeFileExtension(filePath);
+                return !!getSourceFileByPath((filePathWithoutExtension + ".ts" /* Ts */)) ||
+                    !!getSourceFileByPath((filePathWithoutExtension + ".tsx" /* Tsx */));
+            }
+            return false;
+        }
+        function isSameFile(file1, file2) {
+            return ts.comparePaths(file1, file2, currentDirectory, !host.useCaseSensitiveFileNames()) === 0 /* EqualTo */;
+        }
+    }
+    ts.createProgram = createProgram;
+    /* @internal */
+    function parseConfigHostFromCompilerHost(host) {
+        return {
+            fileExists: function (f) { return host.fileExists(f); },
+            readDirectory: function (root, extensions, includes, depth) { return host.readDirectory ? host.readDirectory(root, extensions, includes, depth) : []; },
+            readFile: function (f) { return host.readFile(f); },
+            useCaseSensitiveFileNames: host.useCaseSensitiveFileNames(),
+            getCurrentDirectory: function () { return host.getCurrentDirectory(); },
+            onUnRecoverableConfigFileDiagnostic: function () { return undefined; }
+        };
+    }
+    ts.parseConfigHostFromCompilerHost = parseConfigHostFromCompilerHost;
+    /**
+     * Returns the target config filename of a project reference
+     */
+    function resolveProjectReferencePath(host, ref) {
+        if (!host.fileExists(ref.path)) {
+            return ts.combinePaths(ref.path, "tsconfig.json");
+        }
+        return ref.path;
+    }
+    ts.resolveProjectReferencePath = resolveProjectReferencePath;
+    /* @internal */
+    /**
+     * Returns a DiagnosticMessage if we won't include a resolved module due to its extension.
+     * The DiagnosticMessage's parameters are the imported module name, and the filename it resolved to.
+     * This returns a diagnostic even if the module will be an untyped module.
+     */
+    function getResolutionDiagnostic(options, _a) {
+        var extension = _a.extension;
+        switch (extension) {
+            case ".ts" /* Ts */:
+            case ".d.ts" /* Dts */:
+            case ".json" /* Json */: // Since module is resolved to json file only when --resolveJsonModule, we dont need further check
+                // These are always allowed.
+                return undefined;
+            case ".tsx" /* Tsx */:
+                return needJsx();
+            case ".jsx" /* Jsx */:
+                return needJsx() || needAllowJs();
+            case ".js" /* Js */:
+                return needAllowJs();
+        }
+        function needJsx() {
+            return options.jsx ? undefined : ts.Diagnostics.Module_0_was_resolved_to_1_but_jsx_is_not_set;
+        }
+        function needAllowJs() {
+            return options.allowJs || !ts.getStrictOptionValue(options, "noImplicitAny") ? undefined : ts.Diagnostics.Could_not_find_a_declaration_file_for_module_0_1_implicitly_has_an_any_type;
+        }
+    }
+    ts.getResolutionDiagnostic = getResolutionDiagnostic;
+    function getModuleNames(_a) {
+        var imports = _a.imports, moduleAugmentations = _a.moduleAugmentations;
+        var res = imports.map(function (i) { return i.text; });
+        for (var _i = 0, moduleAugmentations_1 = moduleAugmentations; _i < moduleAugmentations_1.length; _i++) {
+            var aug = moduleAugmentations_1[_i];
+            if (aug.kind === 9 /* StringLiteral */) {
+                res.push(aug.text);
+            }
+            // Do nothing if it's an Identifier; we don't need to do module resolution for `declare global`.
+        }
+        return res;
+    }
+})(ts || (ts = {}));
+/*@internal*/
+var ts;
+(function (ts) {
+    function getFileEmitOutput(program, sourceFile, emitOnlyDtsFiles, cancellationToken, customTransformers) {
+        var outputFiles = [];
+        var emitResult = program.emit(sourceFile, writeFile, cancellationToken, emitOnlyDtsFiles, customTransformers);
+        return { outputFiles: outputFiles, emitSkipped: emitResult.emitSkipped };
+        function writeFile(fileName, text, writeByteOrderMark) {
+            outputFiles.push({ name: fileName, writeByteOrderMark: writeByteOrderMark, text: text });
+        }
+    }
+    ts.getFileEmitOutput = getFileEmitOutput;
+})(ts || (ts = {}));
+/*@internal*/
+(function (ts) {
+    var BuilderState;
+    (function (BuilderState) {
+        /**
+         * Gets the referenced files for a file from the program with values for the keys as referenced file's path to be true
+         */
+        function getReferencedFiles(program, sourceFile, getCanonicalFileName) {
+            var referencedFiles;
+            // We need to use a set here since the code can contain the same import twice,
+            // but that will only be one dependency.
+            // To avoid invernal conversion, the key of the referencedFiles map must be of type Path
+            if (sourceFile.imports && sourceFile.imports.length > 0) {
+                var checker = program.getTypeChecker();
+                for (var _i = 0, _a = sourceFile.imports; _i < _a.length; _i++) {
+                    var importName = _a[_i];
+                    var symbol = checker.getSymbolAtLocation(importName);
+                    if (symbol && symbol.declarations && symbol.declarations[0]) {
+                        var declarationSourceFile = ts.getSourceFileOfNode(symbol.declarations[0]);
+                        if (declarationSourceFile) {
+                            addReferencedFile(declarationSourceFile.path);
+                        }
+                    }
+                }
+            }
+            var sourceFileDirectory = ts.getDirectoryPath(sourceFile.path);
+            // Handle triple slash references
+            if (sourceFile.referencedFiles && sourceFile.referencedFiles.length > 0) {
+                for (var _b = 0, _c = sourceFile.referencedFiles; _b < _c.length; _b++) {
+                    var referencedFile = _c[_b];
+                    var referencedPath = ts.toPath(referencedFile.fileName, sourceFileDirectory, getCanonicalFileName);
+                    addReferencedFile(referencedPath);
+                }
+            }
+            // Handle type reference directives
+            if (sourceFile.resolvedTypeReferenceDirectiveNames) {
+                sourceFile.resolvedTypeReferenceDirectiveNames.forEach(function (resolvedTypeReferenceDirective) {
+                    if (!resolvedTypeReferenceDirective) {
+                        return;
+                    }
+                    var fileName = resolvedTypeReferenceDirective.resolvedFileName; // TODO: GH#18217
+                    var typeFilePath = ts.toPath(fileName, sourceFileDirectory, getCanonicalFileName);
+                    addReferencedFile(typeFilePath);
+                });
+            }
+            return referencedFiles;
+            function addReferencedFile(referencedPath) {
+                if (!referencedFiles) {
+                    referencedFiles = ts.createMap();
+                }
+                referencedFiles.set(referencedPath, true);
+            }
+        }
+        /**
+         * Returns true if oldState is reusable, that is the emitKind = module/non module has not changed
+         */
+        function canReuseOldState(newReferencedMap, oldState) {
+            return oldState && !oldState.referencedMap === !newReferencedMap;
+        }
+        BuilderState.canReuseOldState = canReuseOldState;
+        /**
+         * Creates the state of file references and signature for the new program from oldState if it is safe
+         */
+        function create(newProgram, getCanonicalFileName, oldState) {
+            var fileInfos = ts.createMap();
+            var referencedMap = newProgram.getCompilerOptions().module !== ts.ModuleKind.None ? ts.createMap() : undefined;
+            var hasCalledUpdateShapeSignature = ts.createMap();
+            var useOldState = canReuseOldState(referencedMap, oldState);
+            // Create the reference map, and set the file infos
+            for (var _i = 0, _a = newProgram.getSourceFiles(); _i < _a.length; _i++) {
+                var sourceFile = _a[_i];
+                var version_1 = sourceFile.version;
+                var oldInfo = useOldState ? oldState.fileInfos.get(sourceFile.path) : undefined;
+                if (referencedMap) {
+                    var newReferences = getReferencedFiles(newProgram, sourceFile, getCanonicalFileName);
+                    if (newReferences) {
+                        referencedMap.set(sourceFile.path, newReferences);
+                    }
+                }
+                fileInfos.set(sourceFile.path, { version: version_1, signature: oldInfo && oldInfo.signature });
+            }
+            return {
+                fileInfos: fileInfos,
+                referencedMap: referencedMap,
+                hasCalledUpdateShapeSignature: hasCalledUpdateShapeSignature,
+                allFilesExcludingDefaultLibraryFile: undefined,
+                allFileNames: undefined
+            };
+        }
+        BuilderState.create = create;
+        /**
+         * Gets the files affected by the path from the program
+         */
+        function getFilesAffectedBy(state, programOfThisState, path, cancellationToken, computeHash, cacheToUpdateSignature) {
+            // Since the operation could be cancelled, the signatures are always stored in the cache
+            // They will be commited once it is safe to use them
+            // eg when calling this api from tsserver, if there is no cancellation of the operation
+            // In the other cases the affected files signatures are commited only after the iteration through the result is complete
+            var signatureCache = cacheToUpdateSignature || ts.createMap();
+            var sourceFile = programOfThisState.getSourceFileByPath(path);
+            if (!sourceFile) {
+                return ts.emptyArray;
+            }
+            if (!updateShapeSignature(state, programOfThisState, sourceFile, signatureCache, cancellationToken, computeHash)) {
+                return [sourceFile];
+            }
+            var result = (state.referencedMap ? getFilesAffectedByUpdatedShapeWhenModuleEmit : getFilesAffectedByUpdatedShapeWhenNonModuleEmit)(state, programOfThisState, sourceFile, signatureCache, cancellationToken, computeHash);
+            if (!cacheToUpdateSignature) {
+                // Commit all the signatures in the signature cache
+                updateSignaturesFromCache(state, signatureCache);
+            }
+            return result;
+        }
+        BuilderState.getFilesAffectedBy = getFilesAffectedBy;
+        /**
+         * Updates the signatures from the cache into state's fileinfo signatures
+         * This should be called whenever it is safe to commit the state of the builder
+         */
+        function updateSignaturesFromCache(state, signatureCache) {
+            signatureCache.forEach(function (signature, path) {
+                state.fileInfos.get(path).signature = signature;
+                state.hasCalledUpdateShapeSignature.set(path, true);
+            });
+        }
+        BuilderState.updateSignaturesFromCache = updateSignaturesFromCache;
+        /**
+         * Returns if the shape of the signature has changed since last emit
+         */
+        function updateShapeSignature(state, programOfThisState, sourceFile, cacheToUpdateSignature, cancellationToken, computeHash) {
+            ts.Debug.assert(!!sourceFile);
+            // If we have cached the result for this file, that means hence forth we should assume file shape is uptodate
+            if (state.hasCalledUpdateShapeSignature.has(sourceFile.path) || cacheToUpdateSignature.has(sourceFile.path)) {
+                return false;
+            }
+            var info = state.fileInfos.get(sourceFile.path);
+            if (!info)
+                return ts.Debug.fail();
+            var prevSignature = info.signature;
+            var latestSignature;
+            if (sourceFile.isDeclarationFile) {
+                latestSignature = sourceFile.version;
+            }
+            else {
+                var emitOutput = ts.getFileEmitOutput(programOfThisState, sourceFile, /*emitOnlyDtsFiles*/ true, cancellationToken);
+                if (emitOutput.outputFiles && emitOutput.outputFiles.length > 0) {
+                    latestSignature = computeHash(emitOutput.outputFiles[0].text);
+                }
+                else {
+                    latestSignature = prevSignature; // TODO: GH#18217
+                }
+            }
+            cacheToUpdateSignature.set(sourceFile.path, latestSignature);
+            return !prevSignature || latestSignature !== prevSignature;
+        }
+        /**
+         * Get all the dependencies of the sourceFile
+         */
+        function getAllDependencies(state, programOfThisState, sourceFile) {
+            var _a;
+            var compilerOptions = programOfThisState.getCompilerOptions();
+            // With --out or --outFile all outputs go into single file, all files depend on each other
+            if (compilerOptions.outFile || compilerOptions.out) {
+                return getAllFileNames(state, programOfThisState);
+            }
+            // If this is non module emit, or its a global file, it depends on all the source files
+            if (!state.referencedMap || (!ts.isExternalModule(sourceFile) && !containsOnlyAmbientModules(sourceFile))) {
+                return getAllFileNames(state, programOfThisState);
+            }
+            // Get the references, traversing deep from the referenceMap
+            var seenMap = ts.createMap();
+            var queue = [sourceFile.path];
+            while (queue.length) {
+                var path = queue.pop();
+                if (!seenMap.has(path)) {
+                    seenMap.set(path, true);
+                    var references = state.referencedMap.get(path);
+                    if (references) {
+                        var iterator = references.keys();
+                        for (var _b = iterator.next(), value = _b.value, done = _b.done; !done; _a = iterator.next(), value = _a.value, done = _a.done, _a) {
+                            queue.push(value);
+                        }
+                    }
+                }
+            }
+            return ts.arrayFrom(ts.mapDefinedIterator(seenMap.keys(), function (path) {
+                var file = programOfThisState.getSourceFileByPath(path);
+                return file ? file.fileName : path;
+            }));
+        }
+        BuilderState.getAllDependencies = getAllDependencies;
+        /**
+         * Gets the names of all files from the program
+         */
+        function getAllFileNames(state, programOfThisState) {
+            if (!state.allFileNames) {
+                var sourceFiles = programOfThisState.getSourceFiles();
+                state.allFileNames = sourceFiles === ts.emptyArray ? ts.emptyArray : sourceFiles.map(function (file) { return file.fileName; });
+            }
+            return state.allFileNames;
+        }
+        /**
+         * Gets the files referenced by the the file path
+         */
+        function getReferencedByPaths(state, referencedFilePath) {
+            return ts.arrayFrom(ts.mapDefinedIterator(state.referencedMap.entries(), function (_a) {
+                var filePath = _a[0], referencesInFile = _a[1];
+                return referencesInFile.has(referencedFilePath) ? filePath : undefined;
+            }));
+        }
+        /**
+         * For script files that contains only ambient external modules, although they are not actually external module files,
+         * they can only be consumed via importing elements from them. Regular script files cannot consume them. Therefore,
+         * there are no point to rebuild all script files if these special files have changed. However, if any statement
+         * in the file is not ambient external module, we treat it as a regular script file.
+         */
+        function containsOnlyAmbientModules(sourceFile) {
+            for (var _i = 0, _a = sourceFile.statements; _i < _a.length; _i++) {
+                var statement = _a[_i];
+                if (!ts.isModuleWithStringLiteralName(statement)) {
+                    return false;
+                }
+            }
+            return true;
+        }
+        /**
+         * Gets all files of the program excluding the default library file
+         */
+        function getAllFilesExcludingDefaultLibraryFile(state, programOfThisState, firstSourceFile) {
+            // Use cached result
+            if (state.allFilesExcludingDefaultLibraryFile) {
+                return state.allFilesExcludingDefaultLibraryFile;
+            }
+            var result;
+            addSourceFile(firstSourceFile);
+            for (var _i = 0, _a = programOfThisState.getSourceFiles(); _i < _a.length; _i++) {
+                var sourceFile = _a[_i];
+                if (sourceFile !== firstSourceFile) {
+                    addSourceFile(sourceFile);
+                }
+            }
+            state.allFilesExcludingDefaultLibraryFile = result || ts.emptyArray;
+            return state.allFilesExcludingDefaultLibraryFile;
+            function addSourceFile(sourceFile) {
+                if (!programOfThisState.isSourceFileDefaultLibrary(sourceFile)) {
+                    (result || (result = [])).push(sourceFile);
+                }
+            }
+        }
+        /**
+         * When program emits non modular code, gets the files affected by the sourceFile whose shape has changed
+         */
+        function getFilesAffectedByUpdatedShapeWhenNonModuleEmit(state, programOfThisState, sourceFileWithUpdatedShape) {
+            var compilerOptions = programOfThisState.getCompilerOptions();
+            // If `--out` or `--outFile` is specified, any new emit will result in re-emitting the entire project,
+            // so returning the file itself is good enough.
+            if (compilerOptions && (compilerOptions.out || compilerOptions.outFile)) {
+                return [sourceFileWithUpdatedShape];
+            }
+            return getAllFilesExcludingDefaultLibraryFile(state, programOfThisState, sourceFileWithUpdatedShape);
+        }
+        /**
+         * When program emits modular code, gets the files affected by the sourceFile whose shape has changed
+         */
+        function getFilesAffectedByUpdatedShapeWhenModuleEmit(state, programOfThisState, sourceFileWithUpdatedShape, cacheToUpdateSignature, cancellationToken, computeHash) {
+            if (!ts.isExternalModule(sourceFileWithUpdatedShape) && !containsOnlyAmbientModules(sourceFileWithUpdatedShape)) {
+                return getAllFilesExcludingDefaultLibraryFile(state, programOfThisState, sourceFileWithUpdatedShape);
+            }
+            var compilerOptions = programOfThisState.getCompilerOptions();
+            if (compilerOptions && (compilerOptions.isolatedModules || compilerOptions.out || compilerOptions.outFile)) {
+                return [sourceFileWithUpdatedShape];
+            }
+            // Now we need to if each file in the referencedBy list has a shape change as well.
+            // Because if so, its own referencedBy files need to be saved as well to make the
+            // emitting result consistent with files on disk.
+            var seenFileNamesMap = ts.createMap();
+            // Start with the paths this file was referenced by
+            seenFileNamesMap.set(sourceFileWithUpdatedShape.path, sourceFileWithUpdatedShape);
+            var queue = getReferencedByPaths(state, sourceFileWithUpdatedShape.path);
+            while (queue.length > 0) {
+                var currentPath = queue.pop();
+                if (!seenFileNamesMap.has(currentPath)) {
+                    var currentSourceFile = programOfThisState.getSourceFileByPath(currentPath);
+                    seenFileNamesMap.set(currentPath, currentSourceFile);
+                    if (currentSourceFile && updateShapeSignature(state, programOfThisState, currentSourceFile, cacheToUpdateSignature, cancellationToken, computeHash)) { // TODO: GH#18217
+                        queue.push.apply(// TODO: GH#18217
+                        queue, getReferencedByPaths(state, currentPath));
+                    }
+                }
+            }
+            // Return array of values that needs emit
+            // Return array of values that needs emit
+            return ts.arrayFrom(ts.mapDefinedIterator(seenFileNamesMap.values(), function (value) { return value; }));
+        }
+    })(BuilderState = ts.BuilderState || (ts.BuilderState = {}));
+})(ts || (ts = {}));
+/*@internal*/
+var ts;
+(function (ts) {
+    function hasSameKeys(map1, map2) {
+        // Has same size and every key is present in both maps
+        return map1 === map2 || map1 !== undefined && map2 !== undefined && map1.size === map2.size && !ts.forEachKey(map1, function (key) { return !map2.has(key); });
+    }
+    /**
+     * Create the state so that we can iterate on changedFiles/affected files
+     */
+    function createBuilderProgramState(newProgram, getCanonicalFileName, oldState) {
+        var state = ts.BuilderState.create(newProgram, getCanonicalFileName, oldState);
+        state.program = newProgram;
+        var compilerOptions = newProgram.getCompilerOptions();
+        if (!compilerOptions.outFile && !compilerOptions.out) {
+            state.semanticDiagnosticsPerFile = ts.createMap();
+        }
+        state.changedFilesSet = ts.createMap();
+        var useOldState = ts.BuilderState.canReuseOldState(state.referencedMap, oldState);
+        var canCopySemanticDiagnostics = useOldState && oldState.semanticDiagnosticsPerFile && !!state.semanticDiagnosticsPerFile;
+        if (useOldState) {
+            // Verify the sanity of old state
+            if (!oldState.currentChangedFilePath) {
+                ts.Debug.assert(!oldState.affectedFiles && (!oldState.currentAffectedFilesSignatures || !oldState.currentAffectedFilesSignatures.size), "Cannot reuse if only few affected files of currentChangedFile were iterated");
+            }
+            if (canCopySemanticDiagnostics) {
+                ts.Debug.assert(!ts.forEachKey(oldState.changedFilesSet, function (path) { return oldState.semanticDiagnosticsPerFile.has(path); }), "Semantic diagnostics shouldnt be available for changed files");
+            }
+            // Copy old state's changed files set
+            ts.copyEntries(oldState.changedFilesSet, state.changedFilesSet);
+        }
+        // Update changed files and copy semantic diagnostics if we can
+        var referencedMap = state.referencedMap;
+        var oldReferencedMap = useOldState ? oldState.referencedMap : undefined;
+        state.fileInfos.forEach(function (info, sourceFilePath) {
+            var oldInfo;
+            var newReferences;
+            // if not using old state, every file is changed
+            if (!useOldState ||
+                // File wasnt present in old state
+                !(oldInfo = oldState.fileInfos.get(sourceFilePath)) ||
+                // versions dont match
+                oldInfo.version !== info.version ||
+                // Referenced files changed
+                !hasSameKeys(newReferences = referencedMap && referencedMap.get(sourceFilePath), oldReferencedMap && oldReferencedMap.get(sourceFilePath)) ||
+                // Referenced file was deleted in the new program
+                newReferences && ts.forEachKey(newReferences, function (path) { return !state.fileInfos.has(path) && oldState.fileInfos.has(path); })) {
+                // Register file as changed file and do not copy semantic diagnostics, since all changed files need to be re-evaluated
+                state.changedFilesSet.set(sourceFilePath, true);
+            }
+            else if (canCopySemanticDiagnostics) {
+                // Unchanged file copy diagnostics
+                var diagnostics = oldState.semanticDiagnosticsPerFile.get(sourceFilePath);
+                if (diagnostics) {
+                    state.semanticDiagnosticsPerFile.set(sourceFilePath, diagnostics);
+                }
+            }
+        });
+        return state;
+    }
+    /**
+     * Verifies that source file is ok to be used in calls that arent handled by next
+     */
+    function assertSourceFileOkWithoutNextAffectedCall(state, sourceFile) {
+        ts.Debug.assert(!sourceFile || !state.affectedFiles || state.affectedFiles[state.affectedFilesIndex - 1] !== sourceFile || !state.semanticDiagnosticsPerFile.has(sourceFile.path));
+    }
+    /**
+     * This function returns the next affected file to be processed.
+     * Note that until doneAffected is called it would keep reporting same result
+     * This is to allow the callers to be able to actually remove affected file only when the operation is complete
+     * eg. if during diagnostics check cancellation token ends up cancelling the request, the affected file should be retained
+     */
+    function getNextAffectedFile(state, cancellationToken, computeHash) {
+        while (true) {
+            var affectedFiles = state.affectedFiles;
+            if (affectedFiles) {
+                var seenAffectedFiles = state.seenAffectedFiles, semanticDiagnosticsPerFile = state.semanticDiagnosticsPerFile;
+                var affectedFilesIndex = state.affectedFilesIndex; // TODO: GH#18217
+                while (affectedFilesIndex < affectedFiles.length) {
+                    var affectedFile = affectedFiles[affectedFilesIndex];
+                    if (!seenAffectedFiles.has(affectedFile.path)) {
+                        // Set the next affected file as seen and remove the cached semantic diagnostics
+                        state.affectedFilesIndex = affectedFilesIndex;
+                        semanticDiagnosticsPerFile.delete(affectedFile.path);
+                        return affectedFile;
+                    }
+                    seenAffectedFiles.set(affectedFile.path, true);
+                    affectedFilesIndex++;
+                }
+                // Remove the changed file from the change set
+                state.changedFilesSet.delete(state.currentChangedFilePath);
+                state.currentChangedFilePath = undefined;
+                // Commit the changes in file signature
+                ts.BuilderState.updateSignaturesFromCache(state, state.currentAffectedFilesSignatures);
+                state.currentAffectedFilesSignatures.clear();
+                state.affectedFiles = undefined;
+            }
+            // Get next changed file
+            var nextKey = state.changedFilesSet.keys().next();
+            if (nextKey.done) {
+                // Done
+                return undefined;
+            }
+            // With --out or --outFile all outputs go into single file
+            // so operations are performed directly on program, return program
+            var compilerOptions = state.program.getCompilerOptions();
+            if (compilerOptions.outFile || compilerOptions.out) {
+                ts.Debug.assert(!state.semanticDiagnosticsPerFile);
+                return state.program;
+            }
+            // Get next batch of affected files
+            state.currentAffectedFilesSignatures = state.currentAffectedFilesSignatures || ts.createMap();
+            state.affectedFiles = ts.BuilderState.getFilesAffectedBy(state, state.program, nextKey.value, cancellationToken, computeHash, state.currentAffectedFilesSignatures);
+            state.currentChangedFilePath = nextKey.value;
+            state.semanticDiagnosticsPerFile.delete(nextKey.value);
+            state.affectedFilesIndex = 0;
+            state.seenAffectedFiles = state.seenAffectedFiles || ts.createMap();
+        }
+    }
+    /**
+     * This is called after completing operation on the next affected file.
+     * The operations here are postponed to ensure that cancellation during the iteration is handled correctly
+     */
+    function doneWithAffectedFile(state, affected) {
+        if (affected === state.program) {
+            state.changedFilesSet.clear();
+        }
+        else {
+            state.seenAffectedFiles.set(affected.path, true);
+            state.affectedFilesIndex++;
+        }
+    }
+    /**
+     * Returns the result with affected file
+     */
+    function toAffectedFileResult(state, result, affected) {
+        doneWithAffectedFile(state, affected);
+        return { result: result, affected: affected };
+    }
+    /**
+     * Gets the semantic diagnostics either from cache if present, or otherwise from program and caches it
+     * Note that it is assumed that the when asked about semantic diagnostics, the file has been taken out of affected files/changed file set
+     */
+    function getSemanticDiagnosticsOfFile(state, sourceFile, cancellationToken) {
+        var path = sourceFile.path;
+        var cachedDiagnostics = state.semanticDiagnosticsPerFile.get(path);
+        // Report the semantic diagnostics from the cache if we already have those diagnostics present
+        if (cachedDiagnostics) {
+            return cachedDiagnostics;
+        }
+        // Diagnostics werent cached, get them from program, and cache the result
+        var diagnostics = state.program.getSemanticDiagnostics(sourceFile, cancellationToken);
+        state.semanticDiagnosticsPerFile.set(path, diagnostics);
+        return diagnostics;
+    }
+    var BuilderProgramKind;
+    (function (BuilderProgramKind) {
+        BuilderProgramKind[BuilderProgramKind["SemanticDiagnosticsBuilderProgram"] = 0] = "SemanticDiagnosticsBuilderProgram";
+        BuilderProgramKind[BuilderProgramKind["EmitAndSemanticDiagnosticsBuilderProgram"] = 1] = "EmitAndSemanticDiagnosticsBuilderProgram";
+    })(BuilderProgramKind = ts.BuilderProgramKind || (ts.BuilderProgramKind = {}));
+    function getBuilderCreationParameters(newProgramOrRootNames, hostOrOptions, oldProgramOrHost, configFileParsingDiagnosticsOrOldProgram, configFileParsingDiagnostics) {
+        var host;
+        var newProgram;
+        var oldProgram;
+        if (newProgramOrRootNames === undefined) {
+            ts.Debug.assert(hostOrOptions === undefined);
+            host = oldProgramOrHost;
+            oldProgram = configFileParsingDiagnosticsOrOldProgram;
+            ts.Debug.assert(!!oldProgram);
+            newProgram = oldProgram.getProgram();
+        }
+        else if (ts.isArray(newProgramOrRootNames)) {
+            oldProgram = configFileParsingDiagnosticsOrOldProgram;
+            newProgram = ts.createProgram(newProgramOrRootNames, hostOrOptions, oldProgramOrHost, oldProgram && oldProgram.getProgram(), configFileParsingDiagnostics);
+            host = oldProgramOrHost;
+        }
+        else {
+            newProgram = newProgramOrRootNames;
+            host = hostOrOptions;
+            oldProgram = oldProgramOrHost;
+            configFileParsingDiagnostics = configFileParsingDiagnosticsOrOldProgram;
+        }
+        return { host: host, newProgram: newProgram, oldProgram: oldProgram, configFileParsingDiagnostics: configFileParsingDiagnostics || ts.emptyArray };
+    }
+    ts.getBuilderCreationParameters = getBuilderCreationParameters;
+    function createBuilderProgram(kind, _a) {
+        var newProgram = _a.newProgram, host = _a.host, oldProgram = _a.oldProgram, configFileParsingDiagnostics = _a.configFileParsingDiagnostics;
+        // Return same program if underlying program doesnt change
+        var oldState = oldProgram && oldProgram.getState();
+        if (oldState && newProgram === oldState.program && configFileParsingDiagnostics === newProgram.getConfigFileParsingDiagnostics()) {
+            newProgram = undefined; // TODO: GH#18217
+            oldState = undefined;
+            return oldProgram;
+        }
+        /**
+         * Create the canonical file name for identity
+         */
+        var getCanonicalFileName = ts.createGetCanonicalFileName(host.useCaseSensitiveFileNames());
+        /**
+         * Computing hash to for signature verification
+         */
+        var computeHash = host.createHash || ts.identity;
+        var state = createBuilderProgramState(newProgram, getCanonicalFileName, oldState);
+        // To ensure that we arent storing any references to old program or new program without state
+        newProgram = undefined; // TODO: GH#18217
+        oldProgram = undefined;
+        oldState = undefined;
+        var result = {
+            getState: function () { return state; },
+            getProgram: function () { return state.program; },
+            getCompilerOptions: function () { return state.program.getCompilerOptions(); },
+            getSourceFile: function (fileName) { return state.program.getSourceFile(fileName); },
+            getSourceFiles: function () { return state.program.getSourceFiles(); },
+            getOptionsDiagnostics: function (cancellationToken) { return state.program.getOptionsDiagnostics(cancellationToken); },
+            getGlobalDiagnostics: function (cancellationToken) { return state.program.getGlobalDiagnostics(cancellationToken); },
+            getConfigFileParsingDiagnostics: function () { return configFileParsingDiagnostics || state.program.getConfigFileParsingDiagnostics(); },
+            getSyntacticDiagnostics: function (sourceFile, cancellationToken) { return state.program.getSyntacticDiagnostics(sourceFile, cancellationToken); },
+            getSemanticDiagnostics: getSemanticDiagnostics,
+            emit: emit,
+            getAllDependencies: function (sourceFile) { return ts.BuilderState.getAllDependencies(state, state.program, sourceFile); },
+            getCurrentDirectory: function () { return state.program.getCurrentDirectory(); }
+        };
+        if (kind === BuilderProgramKind.SemanticDiagnosticsBuilderProgram) {
+            result.getSemanticDiagnosticsOfNextAffectedFile = getSemanticDiagnosticsOfNextAffectedFile;
+        }
+        else if (kind === BuilderProgramKind.EmitAndSemanticDiagnosticsBuilderProgram) {
+            result.emitNextAffectedFile = emitNextAffectedFile;
+        }
+        else {
+            ts.notImplemented();
+        }
+        return result;
+        /**
+         * Emits the next affected file's emit result (EmitResult and sourceFiles emitted) or returns undefined if iteration is complete
+         * The first of writeFile if provided, writeFile of BuilderProgramHost if provided, writeFile of compiler host
+         * in that order would be used to write the files
+         */
+        function emitNextAffectedFile(writeFile, cancellationToken, emitOnlyDtsFiles, customTransformers) {
+            var affected = getNextAffectedFile(state, cancellationToken, computeHash);
+            if (!affected) {
+                // Done
+                return undefined;
+            }
+            return toAffectedFileResult(state, 
+            // When whole program is affected, do emit only once (eg when --out or --outFile is specified)
+            // Otherwise just affected file
+            state.program.emit(affected === state.program ? undefined : affected, writeFile || host.writeFile, cancellationToken, emitOnlyDtsFiles, customTransformers), affected);
+        }
+        /**
+         * Emits the JavaScript and declaration files.
+         * When targetSource file is specified, emits the files corresponding to that source file,
+         * otherwise for the whole program.
+         * In case of EmitAndSemanticDiagnosticsBuilderProgram, when targetSourceFile is specified,
+         * it is assumed that that file is handled from affected file list. If targetSourceFile is not specified,
+         * it will only emit all the affected files instead of whole program
+         *
+         * The first of writeFile if provided, writeFile of BuilderProgramHost if provided, writeFile of compiler host
+         * in that order would be used to write the files
+         */
+        function emit(targetSourceFile, writeFile, cancellationToken, emitOnlyDtsFiles, customTransformers) {
+            if (kind === BuilderProgramKind.EmitAndSemanticDiagnosticsBuilderProgram) {
+                assertSourceFileOkWithoutNextAffectedCall(state, targetSourceFile);
+                if (!targetSourceFile) {
+                    // Emit and report any errors we ran into.
+                    var sourceMaps = [];
+                    var emitSkipped = false;
+                    var diagnostics = void 0;
+                    var emittedFiles = [];
+                    var affectedEmitResult = void 0;
+                    while (affectedEmitResult = emitNextAffectedFile(writeFile, cancellationToken, emitOnlyDtsFiles, customTransformers)) {
+                        emitSkipped = emitSkipped || affectedEmitResult.result.emitSkipped;
+                        diagnostics = ts.addRange(diagnostics, affectedEmitResult.result.diagnostics);
+                        emittedFiles = ts.addRange(emittedFiles, affectedEmitResult.result.emittedFiles);
+                        sourceMaps = ts.addRange(sourceMaps, affectedEmitResult.result.sourceMaps);
+                    }
+                    return {
+                        emitSkipped: emitSkipped,
+                        diagnostics: diagnostics || ts.emptyArray,
+                        emittedFiles: emittedFiles,
+                        sourceMaps: sourceMaps
+                    };
+                }
+            }
+            return state.program.emit(targetSourceFile, writeFile || host.writeFile, cancellationToken, emitOnlyDtsFiles, customTransformers);
+        }
+        /**
+         * Return the semantic diagnostics for the next affected file or undefined if iteration is complete
+         * If provided ignoreSourceFile would be called before getting the diagnostics and would ignore the sourceFile if the returned value was true
+         */
+        function getSemanticDiagnosticsOfNextAffectedFile(cancellationToken, ignoreSourceFile) {
+            while (true) {
+                var affected = getNextAffectedFile(state, cancellationToken, computeHash);
+                if (!affected) {
+                    // Done
+                    return undefined;
+                }
+                else if (affected === state.program) {
+                    // When whole program is affected, get all semantic diagnostics (eg when --out or --outFile is specified)
+                    return toAffectedFileResult(state, state.program.getSemanticDiagnostics(/*targetSourceFile*/ undefined, cancellationToken), affected);
+                }
+                // Get diagnostics for the affected file if its not ignored
+                if (ignoreSourceFile && ignoreSourceFile(affected)) {
+                    // Get next affected file
+                    doneWithAffectedFile(state, affected);
+                    continue;
+                }
+                return toAffectedFileResult(state, getSemanticDiagnosticsOfFile(state, affected, cancellationToken), affected);
+            }
+        }
+        /**
+         * Gets the semantic diagnostics from the program corresponding to this state of file (if provided) or whole program
+         * The semantic diagnostics are cached and managed here
+         * Note that it is assumed that when asked about semantic diagnostics through this API,
+         * the file has been taken out of affected files so it is safe to use cache or get from program and cache the diagnostics
+         * In case of SemanticDiagnosticsBuilderProgram if the source file is not provided,
+         * it will iterate through all the affected files, to ensure that cache stays valid and yet provide a way to get all semantic diagnostics
+         */
+        function getSemanticDiagnostics(sourceFile, cancellationToken) {
+            assertSourceFileOkWithoutNextAffectedCall(state, sourceFile);
+            var compilerOptions = state.program.getCompilerOptions();
+            if (compilerOptions.outFile || compilerOptions.out) {
+                ts.Debug.assert(!state.semanticDiagnosticsPerFile);
+                // We dont need to cache the diagnostics just return them from program
+                return state.program.getSemanticDiagnostics(sourceFile, cancellationToken);
+            }
+            if (sourceFile) {
+                return getSemanticDiagnosticsOfFile(state, sourceFile, cancellationToken);
+            }
+            if (kind === BuilderProgramKind.SemanticDiagnosticsBuilderProgram) {
+                // When semantic builder asks for diagnostics of the whole program,
+                // ensure that all the affected files are handled
+                var affected = void 0;
+                while (affected = getNextAffectedFile(state, cancellationToken, computeHash)) {
+                    doneWithAffectedFile(state, affected);
+                }
+            }
+            var diagnostics;
+            for (var _i = 0, _a = state.program.getSourceFiles(); _i < _a.length; _i++) {
+                var sourceFile_2 = _a[_i];
+                diagnostics = ts.addRange(diagnostics, getSemanticDiagnosticsOfFile(state, sourceFile_2, cancellationToken));
+            }
+            return diagnostics || ts.emptyArray;
+        }
+    }
+    ts.createBuilderProgram = createBuilderProgram;
+})(ts || (ts = {}));
+(function (ts) {
+    function createSemanticDiagnosticsBuilderProgram(newProgramOrRootNames, hostOrOptions, oldProgramOrHost, configFileParsingDiagnosticsOrOldProgram, configFileParsingDiagnostics) {
+        return ts.createBuilderProgram(ts.BuilderProgramKind.SemanticDiagnosticsBuilderProgram, ts.getBuilderCreationParameters(newProgramOrRootNames, hostOrOptions, oldProgramOrHost, configFileParsingDiagnosticsOrOldProgram, configFileParsingDiagnostics));
+    }
+    ts.createSemanticDiagnosticsBuilderProgram = createSemanticDiagnosticsBuilderProgram;
+    function createEmitAndSemanticDiagnosticsBuilderProgram(newProgramOrRootNames, hostOrOptions, oldProgramOrHost, configFileParsingDiagnosticsOrOldProgram, configFileParsingDiagnostics) {
+        return ts.createBuilderProgram(ts.BuilderProgramKind.EmitAndSemanticDiagnosticsBuilderProgram, ts.getBuilderCreationParameters(newProgramOrRootNames, hostOrOptions, oldProgramOrHost, configFileParsingDiagnosticsOrOldProgram, configFileParsingDiagnostics));
+    }
+    ts.createEmitAndSemanticDiagnosticsBuilderProgram = createEmitAndSemanticDiagnosticsBuilderProgram;
+    function createAbstractBuilder(newProgramOrRootNames, hostOrOptions, oldProgramOrHost, configFileParsingDiagnosticsOrOldProgram, configFileParsingDiagnostics) {
+        var program = ts.getBuilderCreationParameters(newProgramOrRootNames, hostOrOptions, oldProgramOrHost, configFileParsingDiagnosticsOrOldProgram, configFileParsingDiagnostics).newProgram;
+        return {
+            // Only return program, all other methods are not implemented
+            getProgram: function () { return program; },
+            getState: ts.notImplemented,
+            getCompilerOptions: ts.notImplemented,
+            getSourceFile: ts.notImplemented,
+            getSourceFiles: ts.notImplemented,
+            getOptionsDiagnostics: ts.notImplemented,
+            getGlobalDiagnostics: ts.notImplemented,
+            getConfigFileParsingDiagnostics: ts.notImplemented,
+            getSyntacticDiagnostics: ts.notImplemented,
+            getSemanticDiagnostics: ts.notImplemented,
+            emit: ts.notImplemented,
+            getAllDependencies: ts.notImplemented,
+            getCurrentDirectory: ts.notImplemented
+        };
+    }
+    ts.createAbstractBuilder = createAbstractBuilder;
+})(ts || (ts = {}));
+/*@internal*/
+var ts;
+(function (ts) {
+    ts.maxNumberOfFilesToIterateForInvalidation = 256;
+    function createResolutionCache(resolutionHost, rootDirForResolution, logChangesWhenResolvingModule) {
+        var filesWithChangedSetOfUnresolvedImports;
+        var filesWithInvalidatedResolutions;
+        var filesWithInvalidatedNonRelativeUnresolvedImports;
+        var allFilesHaveInvalidatedResolution = false;
+        var getCurrentDirectory = ts.memoize(function () { return resolutionHost.getCurrentDirectory(); }); // TODO: GH#18217
+        var cachedDirectoryStructureHost = resolutionHost.getCachedDirectoryStructureHost();
+        // The resolvedModuleNames and resolvedTypeReferenceDirectives are the cache of resolutions per file.
+        // The key in the map is source file's path.
+        // The values are Map of resolutions with key being name lookedup.
+        var resolvedModuleNames = ts.createMap();
+        var perDirectoryResolvedModuleNames = ts.createMap();
+        var nonRelaticeModuleNameCache = ts.createMap();
+        var moduleResolutionCache = ts.createModuleResolutionCacheWithMaps(perDirectoryResolvedModuleNames, nonRelaticeModuleNameCache, getCurrentDirectory(), resolutionHost.getCanonicalFileName);
+        var resolvedTypeReferenceDirectives = ts.createMap();
+        var perDirectoryResolvedTypeReferenceDirectives = ts.createMap();
+        /**
+         * These are the extensions that failed lookup files will have by default,
+         * any other extension of failed lookup will be store that path in custom failed lookup path
+         * This helps in not having to comb through all resolutions when files are added/removed
+         * Note that .d.ts file also has .d.ts extension hence will be part of default extensions
+         */
+        var failedLookupDefaultExtensions = [".ts" /* Ts */, ".tsx" /* Tsx */, ".js" /* Js */, ".jsx" /* Jsx */, ".json" /* Json */];
+        var customFailedLookupPaths = ts.createMap();
+        var directoryWatchesOfFailedLookups = ts.createMap();
+        var rootDir = rootDirForResolution && ts.removeTrailingDirectorySeparator(ts.getNormalizedAbsolutePath(rootDirForResolution, getCurrentDirectory()));
+        var rootPath = (rootDir && resolutionHost.toPath(rootDir)); // TODO: GH#18217
+        // TypeRoot watches for the types that get added as part of getAutomaticTypeDirectiveNames
+        var typeRootsWatches = ts.createMap();
+        return {
+            startRecordingFilesWithChangedResolutions: startRecordingFilesWithChangedResolutions,
+            finishRecordingFilesWithChangedResolutions: finishRecordingFilesWithChangedResolutions,
+            // perDirectoryResolvedModuleNames and perDirectoryResolvedTypeReferenceDirectives could be non empty if there was exception during program update
+            // (between startCachingPerDirectoryResolution and finishCachingPerDirectoryResolution)
+            startCachingPerDirectoryResolution: clearPerDirectoryResolutions,
+            finishCachingPerDirectoryResolution: finishCachingPerDirectoryResolution,
+            resolveModuleNames: resolveModuleNames,
+            getResolvedModuleWithFailedLookupLocationsFromCache: getResolvedModuleWithFailedLookupLocationsFromCache,
+            resolveTypeReferenceDirectives: resolveTypeReferenceDirectives,
+            removeResolutionsOfFile: removeResolutionsOfFile,
+            invalidateResolutionOfFile: invalidateResolutionOfFile,
+            setFilesWithInvalidatedNonRelativeUnresolvedImports: setFilesWithInvalidatedNonRelativeUnresolvedImports,
+            createHasInvalidatedResolution: createHasInvalidatedResolution,
+            updateTypeRootsWatch: updateTypeRootsWatch,
+            closeTypeRootsWatch: closeTypeRootsWatch,
+            clear: clear
+        };
+        function getResolvedModule(resolution) {
+            return resolution.resolvedModule;
+        }
+        function getResolvedTypeReferenceDirective(resolution) {
+            return resolution.resolvedTypeReferenceDirective;
+        }
+        function isInDirectoryPath(dir, file) {
+            if (dir === undefined || file.length <= dir.length) {
+                return false;
+            }
+            return ts.startsWith(file, dir) && file[dir.length] === ts.directorySeparator;
+        }
+        function clear() {
+            ts.clearMap(directoryWatchesOfFailedLookups, ts.closeFileWatcherOf);
+            customFailedLookupPaths.clear();
+            closeTypeRootsWatch();
+            resolvedModuleNames.clear();
+            resolvedTypeReferenceDirectives.clear();
+            allFilesHaveInvalidatedResolution = false;
+            // perDirectoryResolvedModuleNames and perDirectoryResolvedTypeReferenceDirectives could be non empty if there was exception during program update
+            // (between startCachingPerDirectoryResolution and finishCachingPerDirectoryResolution)
+            clearPerDirectoryResolutions();
+        }
+        function startRecordingFilesWithChangedResolutions() {
+            filesWithChangedSetOfUnresolvedImports = [];
+        }
+        function finishRecordingFilesWithChangedResolutions() {
+            var collected = filesWithChangedSetOfUnresolvedImports;
+            filesWithChangedSetOfUnresolvedImports = undefined;
+            return collected;
+        }
+        function isFileWithInvalidatedNonRelativeUnresolvedImports(path) {
+            if (!filesWithInvalidatedNonRelativeUnresolvedImports) {
+                return false;
+            }
+            // Invalidated if file has unresolved imports
+            var value = filesWithInvalidatedNonRelativeUnresolvedImports.get(path);
+            return !!value && !!value.length;
+        }
+        function createHasInvalidatedResolution(forceAllFilesAsInvalidated) {
+            if (allFilesHaveInvalidatedResolution || forceAllFilesAsInvalidated) {
+                // Any file asked would have invalidated resolution
+                filesWithInvalidatedResolutions = undefined;
+                return ts.returnTrue;
+            }
+            var collected = filesWithInvalidatedResolutions;
+            filesWithInvalidatedResolutions = undefined;
+            return function (path) { return (!!collected && collected.has(path)) ||
+                isFileWithInvalidatedNonRelativeUnresolvedImports(path); };
+        }
+        function clearPerDirectoryResolutions() {
+            perDirectoryResolvedModuleNames.clear();
+            nonRelaticeModuleNameCache.clear();
+            perDirectoryResolvedTypeReferenceDirectives.clear();
+        }
+        function finishCachingPerDirectoryResolution() {
+            allFilesHaveInvalidatedResolution = false;
+            filesWithInvalidatedNonRelativeUnresolvedImports = undefined;
+            directoryWatchesOfFailedLookups.forEach(function (watcher, path) {
+                if (watcher.refCount === 0) {
+                    directoryWatchesOfFailedLookups.delete(path);
+                    watcher.watcher.close();
+                }
+            });
+            clearPerDirectoryResolutions();
+        }
+        function resolveModuleName(moduleName, containingFile, compilerOptions, host) {
+            var primaryResult = ts.resolveModuleName(moduleName, containingFile, compilerOptions, host, moduleResolutionCache);
+            // return result immediately only if global cache support is not enabled or if it is .ts, .tsx or .d.ts
+            if (!resolutionHost.getGlobalCache) {
+                return primaryResult;
+            }
+            // otherwise try to load typings from @types
+            var globalCache = resolutionHost.getGlobalCache();
+            if (globalCache !== undefined && !ts.isExternalModuleNameRelative(moduleName) && !(primaryResult.resolvedModule && ts.extensionIsTypeScript(primaryResult.resolvedModule.extension))) {
+                // create different collection of failed lookup locations for second pass
+                // if it will fail and we've already found something during the first pass - we don't want to pollute its results
+                var _a = ts.loadModuleFromGlobalCache(moduleName, resolutionHost.projectName, compilerOptions, host, globalCache), resolvedModule = _a.resolvedModule, failedLookupLocations = _a.failedLookupLocations;
+                if (resolvedModule) {
+                    return { resolvedModule: resolvedModule, failedLookupLocations: ts.addRange(primaryResult.failedLookupLocations, failedLookupLocations) };
+                }
+            }
+            // Default return the result from the first pass
+            return primaryResult;
+        }
+        function resolveNamesWithLocalCache(names, containingFile, cache, perDirectoryCache, loader, getResolutionWithResolvedFileName, reusedNames, logChanges) {
+            var path = resolutionHost.toPath(containingFile);
+            var resolutionsInFile = cache.get(path) || cache.set(path, ts.createMap()).get(path);
+            var dirPath = ts.getDirectoryPath(path);
+            var perDirectoryResolution = perDirectoryCache.get(dirPath);
+            if (!perDirectoryResolution) {
+                perDirectoryResolution = ts.createMap();
+                perDirectoryCache.set(dirPath, perDirectoryResolution);
+            }
+            var resolvedModules = [];
+            var compilerOptions = resolutionHost.getCompilationSettings();
+            var hasInvalidatedNonRelativeUnresolvedImport = logChanges && isFileWithInvalidatedNonRelativeUnresolvedImports(path);
+            var seenNamesInFile = ts.createMap();
+            for (var _i = 0, names_2 = names; _i < names_2.length; _i++) {
+                var name = names_2[_i];
+                var resolution = resolutionsInFile.get(name);
+                // Resolution is valid if it is present and not invalidated
+                if (!seenNamesInFile.has(name) &&
+                    allFilesHaveInvalidatedResolution || !resolution || resolution.isInvalidated ||
+                    // If the name is unresolved import that was invalidated, recalculate
+                    (hasInvalidatedNonRelativeUnresolvedImport && !ts.isExternalModuleNameRelative(name) && !getResolutionWithResolvedFileName(resolution))) {
+                    var existingResolution = resolution;
+                    var resolutionInDirectory = perDirectoryResolution.get(name);
+                    if (resolutionInDirectory) {
+                        resolution = resolutionInDirectory;
+                    }
+                    else {
+                        resolution = loader(name, containingFile, compilerOptions, resolutionHost);
+                        perDirectoryResolution.set(name, resolution);
+                    }
+                    resolutionsInFile.set(name, resolution);
+                    watchFailedLookupLocationOfResolution(resolution);
+                    if (existingResolution) {
+                        stopWatchFailedLookupLocationOfResolution(existingResolution);
+                    }
+                    if (logChanges && filesWithChangedSetOfUnresolvedImports && !resolutionIsEqualTo(existingResolution, resolution)) {
+                        filesWithChangedSetOfUnresolvedImports.push(path);
+                        // reset log changes to avoid recording the same file multiple times
+                        logChanges = false;
+                    }
+                }
+                ts.Debug.assert(resolution !== undefined && !resolution.isInvalidated);
+                seenNamesInFile.set(name, true);
+                resolvedModules.push(getResolutionWithResolvedFileName(resolution)); // TODO: GH#18217
+            }
+            // Stop watching and remove the unused name
+            resolutionsInFile.forEach(function (resolution, name) {
+                if (!seenNamesInFile.has(name) && !ts.contains(reusedNames, name)) {
+                    stopWatchFailedLookupLocationOfResolution(resolution);
+                    resolutionsInFile.delete(name);
+                }
+            });
+            return resolvedModules;
+            function resolutionIsEqualTo(oldResolution, newResolution) {
+                if (oldResolution === newResolution) {
+                    return true;
+                }
+                if (!oldResolution || !newResolution) {
+                    return false;
+                }
+                var oldResult = getResolutionWithResolvedFileName(oldResolution);
+                var newResult = getResolutionWithResolvedFileName(newResolution);
+                if (oldResult === newResult) {
+                    return true;
+                }
+                if (!oldResult || !newResult) {
+                    return false;
+                }
+                return oldResult.resolvedFileName === newResult.resolvedFileName;
+            }
+        }
+        function resolveTypeReferenceDirectives(typeDirectiveNames, containingFile) {
+            return resolveNamesWithLocalCache(typeDirectiveNames, containingFile, resolvedTypeReferenceDirectives, perDirectoryResolvedTypeReferenceDirectives, ts.resolveTypeReferenceDirective, getResolvedTypeReferenceDirective, 
+            /*reusedNames*/ undefined, /*logChanges*/ false);
+        }
+        function resolveModuleNames(moduleNames, containingFile, reusedNames) {
+            return resolveNamesWithLocalCache(moduleNames, containingFile, resolvedModuleNames, perDirectoryResolvedModuleNames, resolveModuleName, getResolvedModule, reusedNames, logChangesWhenResolvingModule);
+        }
+        function getResolvedModuleWithFailedLookupLocationsFromCache(moduleName, containingFile) {
+            var cache = resolvedModuleNames.get(resolutionHost.toPath(containingFile));
+            return cache && cache.get(moduleName);
+        }
+        function isNodeModulesDirectory(dirPath) {
+            return ts.endsWith(dirPath, "/node_modules");
+        }
+        function isNodeModulesAtTypesDirectory(dirPath) {
+            return ts.endsWith(dirPath, "/node_modules/@types");
+        }
+        /**
+         * Filter out paths like
+         * "/", "/user", "/user/username", "/user/username/folderAtRoot",
+         * "c:/", "c:/users", "c:/users/username", "c:/users/username/folderAtRoot", "c:/folderAtRoot"
+         * @param dirPath
+         */
+        function canWatchDirectory(dirPath) {
+            var rootLength = ts.getRootLength(dirPath);
+            if (dirPath.length === rootLength) {
+                // Ignore "/", "c:/"
+                return false;
+            }
+            var nextDirectorySeparator = dirPath.indexOf(ts.directorySeparator, rootLength);
+            if (nextDirectorySeparator === -1) {
+                // ignore "/user", "c:/users" or "c:/folderAtRoot"
+                return false;
+            }
+            if (dirPath.charCodeAt(0) !== 47 /* slash */ &&
+                dirPath.substr(rootLength, nextDirectorySeparator).search(/users/i) === -1) {
+                // Paths like c:/folderAtRoot/subFolder are allowed
+                return true;
+            }
+            for (var searchIndex = nextDirectorySeparator + 1, searchLevels = 2; searchLevels > 0; searchLevels--) {
+                searchIndex = dirPath.indexOf(ts.directorySeparator, searchIndex) + 1;
+                if (searchIndex === 0) {
+                    // Folder isnt at expected minimun levels
+                    return false;
+                }
+            }
+            return true;
+        }
+        function filterFSRootDirectoriesToWatch(watchPath, dirPath) {
+            if (!canWatchDirectory(dirPath)) {
+                watchPath.ignore = true;
+            }
+            return watchPath;
+        }
+        function getDirectoryToWatchFailedLookupLocation(failedLookupLocation, failedLookupLocationPath) {
+            if (isInDirectoryPath(rootPath, failedLookupLocationPath)) {
+                return { dir: rootDir, dirPath: rootPath }; // TODO: GH#18217
+            }
+            return getDirectoryToWatchFromFailedLookupLocationDirectory(ts.getDirectoryPath(ts.getNormalizedAbsolutePath(failedLookupLocation, getCurrentDirectory())), ts.getDirectoryPath(failedLookupLocationPath));
+        }
+        function getDirectoryToWatchFromFailedLookupLocationDirectory(dir, dirPath) {
+            // If directory path contains node module, get the most parent node_modules directory for watching
+            while (ts.stringContains(dirPath, "/node_modules/")) {
+                dir = ts.getDirectoryPath(dir);
+                dirPath = ts.getDirectoryPath(dirPath);
+            }
+            // If the directory is node_modules use it to watch
+            if (isNodeModulesDirectory(dirPath)) {
+                return filterFSRootDirectoriesToWatch({ dir: dir, dirPath: dirPath }, ts.getDirectoryPath(dirPath));
+            }
+            // Use some ancestor of the root directory
+            var subDirectoryPath, subDirectory;
+            if (rootPath !== undefined) {
+                while (!isInDirectoryPath(dirPath, rootPath)) {
+                    var parentPath = ts.getDirectoryPath(dirPath);
+                    if (parentPath === dirPath) {
+                        break;
+                    }
+                    subDirectoryPath = dirPath;
+                    subDirectory = dir;
+                    dirPath = parentPath;
+                    dir = ts.getDirectoryPath(dir);
+                }
+            }
+            return filterFSRootDirectoriesToWatch({ dir: subDirectory || dir, dirPath: subDirectoryPath || dirPath }, dirPath);
+        }
+        function isPathWithDefaultFailedLookupExtension(path) {
+            return ts.fileExtensionIsOneOf(path, failedLookupDefaultExtensions);
+        }
+        function watchFailedLookupLocationOfResolution(resolution) {
+            // No need to set the resolution refCount
+            if (!resolution.failedLookupLocations || !resolution.failedLookupLocations.length) {
+                return;
+            }
+            if (resolution.refCount !== undefined) {
+                resolution.refCount++;
+                return;
+            }
+            resolution.refCount = 1;
+            var failedLookupLocations = resolution.failedLookupLocations;
+            var setAtRoot = false;
+            for (var _i = 0, failedLookupLocations_1 = failedLookupLocations; _i < failedLookupLocations_1.length; _i++) {
+                var failedLookupLocation = failedLookupLocations_1[_i];
+                var failedLookupLocationPath = resolutionHost.toPath(failedLookupLocation);
+                var _a = getDirectoryToWatchFailedLookupLocation(failedLookupLocation, failedLookupLocationPath), dir = _a.dir, dirPath = _a.dirPath, ignore = _a.ignore;
+                if (!ignore) {
+                    // If the failed lookup location path is not one of the supported extensions,
+                    // store it in the custom path
+                    if (!isPathWithDefaultFailedLookupExtension(failedLookupLocationPath)) {
+                        var refCount = customFailedLookupPaths.get(failedLookupLocationPath) || 0;
+                        customFailedLookupPaths.set(failedLookupLocationPath, refCount + 1);
+                    }
+                    if (dirPath === rootPath) {
+                        setAtRoot = true;
+                    }
+                    else {
+                        setDirectoryWatcher(dir, dirPath);
+                    }
+                }
+            }
+            if (setAtRoot) {
+                setDirectoryWatcher(rootDir, rootPath); // TODO: GH#18217
+            }
+        }
+        function setDirectoryWatcher(dir, dirPath) {
+            var dirWatcher = directoryWatchesOfFailedLookups.get(dirPath);
+            if (dirWatcher) {
+                dirWatcher.refCount++;
+            }
+            else {
+                directoryWatchesOfFailedLookups.set(dirPath, { watcher: createDirectoryWatcher(dir, dirPath), refCount: 1 });
+            }
+        }
+        function stopWatchFailedLookupLocationOfResolution(resolution) {
+            if (!resolution.failedLookupLocations || !resolution.failedLookupLocations.length) {
+                return;
+            }
+            resolution.refCount--;
+            if (resolution.refCount) {
+                return;
+            }
+            var failedLookupLocations = resolution.failedLookupLocations;
+            var removeAtRoot = false;
+            for (var _i = 0, failedLookupLocations_2 = failedLookupLocations; _i < failedLookupLocations_2.length; _i++) {
+                var failedLookupLocation = failedLookupLocations_2[_i];
+                var failedLookupLocationPath = resolutionHost.toPath(failedLookupLocation);
+                var _a = getDirectoryToWatchFailedLookupLocation(failedLookupLocation, failedLookupLocationPath), dirPath = _a.dirPath, ignore = _a.ignore;
+                if (!ignore) {
+                    var refCount = customFailedLookupPaths.get(failedLookupLocationPath);
+                    if (refCount) {
+                        if (refCount === 1) {
+                            customFailedLookupPaths.delete(failedLookupLocationPath);
+                        }
+                        else {
+                            ts.Debug.assert(refCount > 1);
+                            customFailedLookupPaths.set(failedLookupLocationPath, refCount - 1);
+                        }
+                    }
+                    if (dirPath === rootPath) {
+                        removeAtRoot = true;
+                    }
+                    else {
+                        removeDirectoryWatcher(dirPath);
+                    }
+                }
+            }
+            if (removeAtRoot) {
+                removeDirectoryWatcher(rootPath);
+            }
+        }
+        function removeDirectoryWatcher(dirPath) {
+            var dirWatcher = directoryWatchesOfFailedLookups.get(dirPath);
+            // Do not close the watcher yet since it might be needed by other failed lookup locations.
+            dirWatcher.refCount--;
+        }
+        function createDirectoryWatcher(directory, dirPath) {
+            return resolutionHost.watchDirectoryOfFailedLookupLocation(directory, function (fileOrDirectory) {
+                var fileOrDirectoryPath = resolutionHost.toPath(fileOrDirectory);
+                if (cachedDirectoryStructureHost) {
+                    // Since the file existence changed, update the sourceFiles cache
+                    cachedDirectoryStructureHost.addOrDeleteFileOrDirectory(fileOrDirectory, fileOrDirectoryPath);
+                }
+                if (!allFilesHaveInvalidatedResolution && invalidateResolutionOfFailedLookupLocation(fileOrDirectoryPath, dirPath === fileOrDirectoryPath)) {
+                    resolutionHost.onInvalidatedResolution();
+                }
+            }, 1 /* Recursive */);
+        }
+        function removeResolutionsOfFileFromCache(cache, filePath) {
+            // Deleted file, stop watching failed lookups for all the resolutions in the file
+            var resolutions = cache.get(filePath);
+            if (resolutions) {
+                resolutions.forEach(stopWatchFailedLookupLocationOfResolution);
+                cache.delete(filePath);
+            }
+        }
+        function removeResolutionsOfFile(filePath) {
+            removeResolutionsOfFileFromCache(resolvedModuleNames, filePath);
+            removeResolutionsOfFileFromCache(resolvedTypeReferenceDirectives, filePath);
+        }
+        function invalidateResolutionCache(cache, isInvalidatedResolution, getResolutionWithResolvedFileName) {
+            var seen = ts.createMap();
+            cache.forEach(function (resolutions, containingFilePath) {
+                var dirPath = ts.getDirectoryPath(containingFilePath);
+                var seenInDir = seen.get(dirPath);
+                if (!seenInDir) {
+                    seenInDir = ts.createMap();
+                    seen.set(dirPath, seenInDir);
+                }
+                resolutions.forEach(function (resolution, name) {
+                    if (seenInDir.has(name)) {
+                        return;
+                    }
+                    seenInDir.set(name, true);
+                    if (!resolution.isInvalidated && isInvalidatedResolution(resolution, getResolutionWithResolvedFileName)) {
+                        // Mark the file as needing re-evaluation of module resolution instead of using it blindly.
+                        resolution.isInvalidated = true;
+                        (filesWithInvalidatedResolutions || (filesWithInvalidatedResolutions = ts.createMap())).set(containingFilePath, true);
+                    }
+                });
+            });
+        }
+        function hasReachedResolutionIterationLimit() {
+            var maxSize = resolutionHost.maxNumberOfFilesToIterateForInvalidation || ts.maxNumberOfFilesToIterateForInvalidation;
+            return resolvedModuleNames.size > maxSize || resolvedTypeReferenceDirectives.size > maxSize;
+        }
+        function invalidateResolutions(isInvalidatedResolution) {
+            // If more than maxNumberOfFilesToIterateForInvalidation present,
+            // just invalidated all files and recalculate the resolutions for files instead
+            if (hasReachedResolutionIterationLimit()) {
+                allFilesHaveInvalidatedResolution = true;
+                return;
+            }
+            invalidateResolutionCache(resolvedModuleNames, isInvalidatedResolution, getResolvedModule);
+            invalidateResolutionCache(resolvedTypeReferenceDirectives, isInvalidatedResolution, getResolvedTypeReferenceDirective);
+        }
+        function invalidateResolutionOfFile(filePath) {
+            removeResolutionsOfFile(filePath);
+            invalidateResolutions(
+            // Resolution is invalidated if the resulting file name is same as the deleted file path
+            function (resolution, getResolutionWithResolvedFileName) {
+                var result = getResolutionWithResolvedFileName(resolution);
+                return !!result && resolutionHost.toPath(result.resolvedFileName) === filePath; // TODO: GH#18217
+            });
+        }
+        function setFilesWithInvalidatedNonRelativeUnresolvedImports(filesMap) {
+            ts.Debug.assert(filesWithInvalidatedNonRelativeUnresolvedImports === filesMap || filesWithInvalidatedNonRelativeUnresolvedImports === undefined);
+            filesWithInvalidatedNonRelativeUnresolvedImports = filesMap;
+        }
+        function invalidateResolutionOfFailedLookupLocation(fileOrDirectoryPath, isCreatingWatchedDirectory) {
+            var isChangedFailedLookupLocation;
+            if (isCreatingWatchedDirectory) {
+                // Watching directory is created
+                // Invalidate any resolution has failed lookup in this directory
+                isChangedFailedLookupLocation = function (location) { return isInDirectoryPath(fileOrDirectoryPath, resolutionHost.toPath(location)); };
+            }
+            else {
+                // Some file or directory in the watching directory is created
+                // Return early if it does not have any of the watching extension or not the custom failed lookup path
+                var dirOfFileOrDirectory = ts.getDirectoryPath(fileOrDirectoryPath);
+                if (isNodeModulesAtTypesDirectory(fileOrDirectoryPath) || isNodeModulesDirectory(fileOrDirectoryPath) ||
+                    isNodeModulesAtTypesDirectory(dirOfFileOrDirectory) || isNodeModulesDirectory(dirOfFileOrDirectory)) {
+                    // Invalidate any resolution from this directory
+                    isChangedFailedLookupLocation = function (location) {
+                        var locationPath = resolutionHost.toPath(location);
+                        return locationPath === fileOrDirectoryPath || ts.startsWith(resolutionHost.toPath(location), fileOrDirectoryPath);
+                    };
+                }
+                else {
+                    if (!isPathWithDefaultFailedLookupExtension(fileOrDirectoryPath) && !customFailedLookupPaths.has(fileOrDirectoryPath)) {
+                        return false;
+                    }
+                    // Ignore emits from the program
+                    if (ts.isEmittedFileOfProgram(resolutionHost.getCurrentProgram(), fileOrDirectoryPath)) {
+                        return false;
+                    }
+                    // Resolution need to be invalidated if failed lookup location is same as the file or directory getting created
+                    isChangedFailedLookupLocation = function (location) { return resolutionHost.toPath(location) === fileOrDirectoryPath; };
+                }
+            }
+            var hasChangedFailedLookupLocation = function (resolution) { return ts.some(resolution.failedLookupLocations, isChangedFailedLookupLocation); };
+            var invalidatedFilesCount = filesWithInvalidatedResolutions && filesWithInvalidatedResolutions.size;
+            invalidateResolutions(
+            // Resolution is invalidated if the resulting file name is same as the deleted file path
+            hasChangedFailedLookupLocation);
+            return allFilesHaveInvalidatedResolution || filesWithInvalidatedResolutions && filesWithInvalidatedResolutions.size !== invalidatedFilesCount;
+        }
+        function closeTypeRootsWatch() {
+            ts.clearMap(typeRootsWatches, ts.closeFileWatcher);
+        }
+        function getDirectoryToWatchFailedLookupLocationFromTypeRoot(typeRoot, typeRootPath) {
+            if (allFilesHaveInvalidatedResolution) {
+                return undefined;
+            }
+            if (isInDirectoryPath(rootPath, typeRootPath)) {
+                return rootPath;
+            }
+            var _a = getDirectoryToWatchFromFailedLookupLocationDirectory(typeRoot, typeRootPath), dirPath = _a.dirPath, ignore = _a.ignore;
+            return !ignore && directoryWatchesOfFailedLookups.has(dirPath) ? dirPath : undefined;
+        }
+        function createTypeRootsWatch(typeRootPath, typeRoot) {
+            // Create new watch and recursive info
+            return resolutionHost.watchTypeRootsDirectory(typeRoot, function (fileOrDirectory) {
+                var fileOrDirectoryPath = resolutionHost.toPath(fileOrDirectory);
+                if (cachedDirectoryStructureHost) {
+                    // Since the file existence changed, update the sourceFiles cache
+                    cachedDirectoryStructureHost.addOrDeleteFileOrDirectory(fileOrDirectory, fileOrDirectoryPath);
+                }
+                // For now just recompile
+                // We could potentially store more data here about whether it was/would be really be used or not
+                // and with that determine to trigger compilation but for now this is enough
+                resolutionHost.onChangedAutomaticTypeDirectiveNames();
+                // Since directory watchers invoked are flaky, the failed lookup location events might not be triggered
+                // So handle to failed lookup locations here as well to ensure we are invalidating resolutions
+                var dirPath = getDirectoryToWatchFailedLookupLocationFromTypeRoot(typeRoot, typeRootPath);
+                if (dirPath && invalidateResolutionOfFailedLookupLocation(fileOrDirectoryPath, dirPath === fileOrDirectoryPath)) {
+                    resolutionHost.onInvalidatedResolution();
+                }
+            }, 1 /* Recursive */);
+        }
+        /**
+         * Watches the types that would get added as part of getAutomaticTypeDirectiveNames
+         * To be called when compiler options change
+         */
+        function updateTypeRootsWatch() {
+            var options = resolutionHost.getCompilationSettings();
+            if (options.types) {
+                // No need to do any watch since resolution cache is going to handle the failed lookups
+                // for the types added by this
+                closeTypeRootsWatch();
+                return;
+            }
+            // we need to assume the directories exist to ensure that we can get all the type root directories that get included
+            // But filter directories that are at root level to say directory doesnt exist, so that we arent watching them
+            var typeRoots = ts.getEffectiveTypeRoots(options, { directoryExists: directoryExistsForTypeRootWatch, getCurrentDirectory: getCurrentDirectory });
+            if (typeRoots) {
+                ts.mutateMap(typeRootsWatches, ts.arrayToMap(typeRoots, function (tr) { return resolutionHost.toPath(tr); }), {
+                    createNewValue: createTypeRootsWatch,
+                    onDeleteValue: ts.closeFileWatcher
+                });
+            }
+            else {
+                closeTypeRootsWatch();
+            }
+        }
+        /**
+         * Use this function to return if directory exists to get type roots to watch
+         * If we return directory exists then only the paths will be added to type roots
+         * Hence return true for all directories except root directories which are filtered from watching
+         */
+        function directoryExistsForTypeRootWatch(nodeTypesDirectory) {
+            var dir = ts.getDirectoryPath(ts.getDirectoryPath(nodeTypesDirectory));
+            var dirPath = resolutionHost.toPath(dir);
+            return dirPath === rootPath || canWatchDirectory(dirPath);
+        }
+    }
+    ts.createResolutionCache = createResolutionCache;
+})(ts || (ts = {}));
+// Used by importFixes to synthesize import module specifiers.
+/* @internal */
+var ts;
+(function (ts) {
+    var moduleSpecifiers;
+    (function (moduleSpecifiers) {
+        // Note: fromSourceFile is just for usesJsExtensionOnImports
+        function getModuleSpecifier(compilerOptions, fromSourceFile, fromSourceFileName, toFileName, host, preferences) {
+            if (preferences === void 0) { preferences = {}; }
+            var info = getInfo(compilerOptions, fromSourceFile, fromSourceFileName, host);
+            return getGlobalModuleSpecifier(toFileName, info, host, compilerOptions) ||
+                ts.first(getLocalModuleSpecifiers(toFileName, info, compilerOptions, preferences));
+        }
+        moduleSpecifiers.getModuleSpecifier = getModuleSpecifier;
+        // For each symlink/original for a module, returns a list of ways to import that file.
+        function getModuleSpecifiers(moduleSymbol, program, importingSourceFile, host, preferences) {
+            var ambient = tryGetModuleNameFromAmbientModule(moduleSymbol);
+            if (ambient)
+                return [[ambient]];
+            var compilerOptions = program.getCompilerOptions();
+            var info = getInfo(compilerOptions, importingSourceFile, importingSourceFile.fileName, host);
+            var modulePaths = getAllModulePaths(program, ts.getSourceFileOfNode(moduleSymbol.valueDeclaration));
+            var global = ts.mapDefined(modulePaths, function (moduleFileName) { return getGlobalModuleSpecifier(moduleFileName, info, host, compilerOptions); });
+            return global.length ? global.map(function (g) { return [g]; }) : modulePaths.map(function (moduleFileName) {
+                return getLocalModuleSpecifiers(moduleFileName, info, compilerOptions, preferences);
+            });
+        }
+        moduleSpecifiers.getModuleSpecifiers = getModuleSpecifiers;
+        // importingSourceFileName is separate because getEditsForFileRename may need to specify an updated path
+        function getInfo(compilerOptions, importingSourceFile, importingSourceFileName, host) {
+            var moduleResolutionKind = ts.getEmitModuleResolutionKind(compilerOptions);
+            var addJsExtension = usesJsExtensionOnImports(importingSourceFile);
+            var getCanonicalFileName = ts.createGetCanonicalFileName(host.useCaseSensitiveFileNames ? host.useCaseSensitiveFileNames() : true);
+            var sourceDirectory = ts.getDirectoryPath(importingSourceFileName);
+            return { moduleResolutionKind: moduleResolutionKind, addJsExtension: addJsExtension, getCanonicalFileName: getCanonicalFileName, sourceDirectory: sourceDirectory };
+        }
+        function getGlobalModuleSpecifier(moduleFileName, _a, host, compilerOptions) {
+            var addJsExtension = _a.addJsExtension, getCanonicalFileName = _a.getCanonicalFileName, sourceDirectory = _a.sourceDirectory;
+            return tryGetModuleNameFromTypeRoots(compilerOptions, host, getCanonicalFileName, moduleFileName, addJsExtension)
+                || tryGetModuleNameAsNodeModule(compilerOptions, moduleFileName, host, getCanonicalFileName, sourceDirectory)
+                || compilerOptions.rootDirs && tryGetModuleNameFromRootDirs(compilerOptions.rootDirs, moduleFileName, sourceDirectory, getCanonicalFileName);
+        }
+        function getLocalModuleSpecifiers(moduleFileName, _a, compilerOptions, preferences) {
+            var moduleResolutionKind = _a.moduleResolutionKind, addJsExtension = _a.addJsExtension, getCanonicalFileName = _a.getCanonicalFileName, sourceDirectory = _a.sourceDirectory;
+            var baseUrl = compilerOptions.baseUrl, paths = compilerOptions.paths;
+            var relativePath = removeExtensionAndIndexPostFix(ts.ensurePathIsNonModuleName(ts.getRelativePathFromDirectory(sourceDirectory, moduleFileName, getCanonicalFileName)), moduleResolutionKind, addJsExtension);
+            if (!baseUrl || preferences.importModuleSpecifierPreference === "relative") {
+                return [relativePath];
+            }
+            var relativeToBaseUrl = getRelativePathIfInDirectory(moduleFileName, baseUrl, getCanonicalFileName);
+            if (!relativeToBaseUrl) {
+                return [relativePath];
+            }
+            var importRelativeToBaseUrl = removeExtensionAndIndexPostFix(relativeToBaseUrl, moduleResolutionKind, addJsExtension);
+            if (paths) {
+                var fromPaths = tryGetModuleNameFromPaths(ts.removeFileExtension(relativeToBaseUrl), importRelativeToBaseUrl, paths);
+                if (fromPaths) {
+                    return [fromPaths];
+                }
+            }
+            if (preferences.importModuleSpecifierPreference === "non-relative") {
+                return [importRelativeToBaseUrl];
+            }
+            if (preferences.importModuleSpecifierPreference !== undefined)
+                ts.Debug.assertNever(preferences.importModuleSpecifierPreference);
+            if (isPathRelativeToParent(relativeToBaseUrl)) {
+                return [relativePath];
+            }
+            /*
+            Prefer a relative import over a baseUrl import if it doesn't traverse up to baseUrl.
+    
+            Suppose we have:
+                baseUrl = /base
+                sourceDirectory = /base/a/b
+                moduleFileName = /base/foo/bar
+            Then:
+                relativePath = ../../foo/bar
+                getRelativePathNParents(relativePath) = 2
+                pathFromSourceToBaseUrl = ../../
+                getRelativePathNParents(pathFromSourceToBaseUrl) = 2
+                2 < 2 = false
+            In this case we should prefer using the baseUrl path "/a/b" instead of the relative path "../../foo/bar".
+    
+            Suppose we have:
+                baseUrl = /base
+                sourceDirectory = /base/foo/a
+                moduleFileName = /base/foo/bar
+            Then:
+                relativePath = ../a
+                getRelativePathNParents(relativePath) = 1
+                pathFromSourceToBaseUrl = ../../
+                getRelativePathNParents(pathFromSourceToBaseUrl) = 2
+                1 < 2 = true
+            In this case we should prefer using the relative path "../a" instead of the baseUrl path "foo/a".
+            */
+            var pathFromSourceToBaseUrl = ts.ensurePathIsNonModuleName(ts.getRelativePathFromDirectory(sourceDirectory, baseUrl, getCanonicalFileName));
+            var relativeFirst = getRelativePathNParents(relativePath) < getRelativePathNParents(pathFromSourceToBaseUrl);
+            return relativeFirst ? [relativePath, importRelativeToBaseUrl] : [importRelativeToBaseUrl, relativePath];
+        }
+        function usesJsExtensionOnImports(_a) {
+            var imports = _a.imports;
+            return ts.firstDefined(imports, function (_a) {
+                var text = _a.text;
+                return ts.pathIsRelative(text) ? ts.fileExtensionIs(text, ".js" /* Js */) : undefined;
+            }) || false;
+        }
+        /**
+         * Looks for a existing imports that use symlinks to this module.
+         * Only if no symlink is available, the real path will be used.
+         */
+        function getAllModulePaths(program, _a) {
+            var fileName = _a.fileName;
+            var symlinks = ts.mapDefined(program.getSourceFiles(), function (sf) {
+                return sf.resolvedModules && ts.firstDefinedIterator(sf.resolvedModules.values(), function (res) {
+                    return res && res.resolvedFileName === fileName ? res.originalPath : undefined;
+                });
+            });
+            return symlinks.length === 0 ? [fileName] : symlinks;
+        }
+        function getRelativePathNParents(relativePath) {
+            var components = ts.getPathComponents(relativePath);
+            if (components[0] || components.length === 1)
+                return 0;
+            for (var i = 1; i < components.length; i++) {
+                if (components[i] !== "..")
+                    return i - 1;
+            }
+            return components.length - 1;
+        }
+        function tryGetModuleNameFromAmbientModule(moduleSymbol) {
+            var decl = moduleSymbol.valueDeclaration;
+            if (ts.isModuleDeclaration(decl) && ts.isStringLiteral(decl.name)) {
+                return decl.name.text;
+            }
+        }
+        function tryGetModuleNameFromPaths(relativeToBaseUrlWithIndex, relativeToBaseUrl, paths) {
+            for (var key in paths) {
+                for (var _i = 0, _a = paths[key]; _i < _a.length; _i++) {
+                    var patternText_1 = _a[_i];
+                    var pattern = ts.removeFileExtension(ts.normalizePath(patternText_1));
+                    var indexOfStar = pattern.indexOf("*");
+                    if (indexOfStar === 0 && pattern.length === 1) {
+                        continue;
+                    }
+                    else if (indexOfStar !== -1) {
+                        var prefix = pattern.substr(0, indexOfStar);
+                        var suffix = pattern.substr(indexOfStar + 1);
+                        if (relativeToBaseUrl.length >= prefix.length + suffix.length &&
+                            ts.startsWith(relativeToBaseUrl, prefix) &&
+                            ts.endsWith(relativeToBaseUrl, suffix)) {
+                            var matchedStar = relativeToBaseUrl.substr(prefix.length, relativeToBaseUrl.length - suffix.length);
+                            return key.replace("*", matchedStar);
+                        }
+                    }
+                    else if (pattern === relativeToBaseUrl || pattern === relativeToBaseUrlWithIndex) {
+                        return key;
+                    }
+                }
+            }
+        }
+        function tryGetModuleNameFromRootDirs(rootDirs, moduleFileName, sourceDirectory, getCanonicalFileName) {
+            var normalizedTargetPath = getPathRelativeToRootDirs(moduleFileName, rootDirs, getCanonicalFileName);
+            if (normalizedTargetPath === undefined) {
+                return undefined;
+            }
+            var normalizedSourcePath = getPathRelativeToRootDirs(sourceDirectory, rootDirs, getCanonicalFileName);
+            var relativePath = normalizedSourcePath !== undefined ? ts.ensurePathIsNonModuleName(ts.getRelativePathFromDirectory(normalizedSourcePath, normalizedTargetPath, getCanonicalFileName)) : normalizedTargetPath;
+            return ts.removeFileExtension(relativePath);
+        }
+        function tryGetModuleNameFromTypeRoots(options, host, getCanonicalFileName, moduleFileName, addJsExtension) {
+            var roots = ts.getEffectiveTypeRoots(options, host);
+            return ts.firstDefined(roots, function (unNormalizedTypeRoot) {
+                var typeRoot = ts.toPath(unNormalizedTypeRoot, /*basePath*/ undefined, getCanonicalFileName);
+                if (ts.startsWith(moduleFileName, typeRoot)) {
+                    // For a type definition, we can strip `/index` even with classic resolution.
+                    return removeExtensionAndIndexPostFix(moduleFileName.substring(typeRoot.length + 1), ts.ModuleResolutionKind.NodeJs, addJsExtension);
+                }
+            });
+        }
+        function tryGetModuleNameAsNodeModule(options, moduleFileName, host, getCanonicalFileName, sourceDirectory) {
+            if (ts.getEmitModuleResolutionKind(options) !== ts.ModuleResolutionKind.NodeJs) {
+                // nothing to do here
+                return undefined;
+            }
+            var parts = getNodeModulePathParts(moduleFileName);
+            if (!parts) {
+                return undefined;
+            }
+            // Simplify the full file path to something that can be resolved by Node.
+            // If the module could be imported by a directory name, use that directory's name
+            var moduleSpecifier = getDirectoryOrExtensionlessFileName(moduleFileName);
+            // Get a path that's relative to node_modules or the importing file's path
+            // if node_modules folder is in this folder or any of its parent folders, no need to keep it.
+            if (!ts.startsWith(sourceDirectory, moduleSpecifier.substring(0, parts.topLevelNodeModulesIndex)))
+                return undefined;
+            // If the module was found in @types, get the actual Node package name
+            return ts.getPackageNameFromAtTypesDirectory(moduleSpecifier.substring(parts.topLevelPackageNameIndex + 1));
+            function getDirectoryOrExtensionlessFileName(path) {
+                // If the file is the main module, it can be imported by the package name
+                var packageRootPath = path.substring(0, parts.packageRootIndex);
+                var packageJsonPath = ts.combinePaths(packageRootPath, "package.json");
+                if (host.fileExists(packageJsonPath)) { // TODO: GH#18217
+                    var packageJsonContent = JSON.parse(host.readFile(packageJsonPath));
+                    if (packageJsonContent) {
+                        var mainFileRelative = packageJsonContent.typings || packageJsonContent.types || packageJsonContent.main;
+                        if (mainFileRelative) {
+                            var mainExportFile = ts.toPath(mainFileRelative, packageRootPath, getCanonicalFileName);
+                            if (ts.removeFileExtension(mainExportFile) === ts.removeFileExtension(getCanonicalFileName(path))) {
+                                return packageRootPath;
+                            }
+                        }
+                    }
+                }
+                // We still have a file name - remove the extension
+                var fullModulePathWithoutExtension = ts.removeFileExtension(path);
+                // If the file is /index, it can be imported by its directory name
+                // IFF there is not _also_ a file by the same name
+                if (getCanonicalFileName(fullModulePathWithoutExtension.substring(parts.fileNameIndex)) === "/index" && !tryGetAnyFileFromPath(host, fullModulePathWithoutExtension.substring(0, parts.fileNameIndex))) {
+                    return fullModulePathWithoutExtension.substring(0, parts.fileNameIndex);
+                }
+                return fullModulePathWithoutExtension;
+            }
+        }
+        function tryGetAnyFileFromPath(host, path) {
+            // We check all js, `node` and `json` extensions in addition to TS, since node module resolution would also choose those over the directory
+            var extensions = ts.getSupportedExtensions({ allowJs: true }, [{ extension: "node", isMixedContent: false }, { extension: "json", isMixedContent: false, scriptKind: 6 /* JSON */ }]);
+            for (var _i = 0, extensions_3 = extensions; _i < extensions_3.length; _i++) {
+                var e = extensions_3[_i];
+                var fullPath = path + e;
+                if (host.fileExists(fullPath)) { // TODO: GH#18217
+                    return fullPath;
+                }
+            }
+        }
+        function getNodeModulePathParts(fullPath) {
+            // If fullPath can't be valid module file within node_modules, returns undefined.
+            // Example of expected pattern: /base/path/node_modules/[@scope/otherpackage/@otherscope/node_modules/]package/[subdirectory/]file.js
+            // Returns indices:                       ^            ^                                                      ^             ^
+            var topLevelNodeModulesIndex = 0;
+            var topLevelPackageNameIndex = 0;
+            var packageRootIndex = 0;
+            var fileNameIndex = 0;
+            var States;
+            (function (States) {
+                States[States["BeforeNodeModules"] = 0] = "BeforeNodeModules";
+                States[States["NodeModules"] = 1] = "NodeModules";
+                States[States["Scope"] = 2] = "Scope";
+                States[States["PackageContent"] = 3] = "PackageContent";
+            })(States || (States = {}));
+            var partStart = 0;
+            var partEnd = 0;
+            var state = 0 /* BeforeNodeModules */;
+            while (partEnd >= 0) {
+                partStart = partEnd;
+                partEnd = fullPath.indexOf("/", partStart + 1);
+                switch (state) {
+                    case 0 /* BeforeNodeModules */:
+                        if (fullPath.indexOf("/node_modules/", partStart) === partStart) {
+                            topLevelNodeModulesIndex = partStart;
+                            topLevelPackageNameIndex = partEnd;
+                            state = 1 /* NodeModules */;
+                        }
+                        break;
+                    case 1 /* NodeModules */:
+                    case 2 /* Scope */:
+                        if (state === 1 /* NodeModules */ && fullPath.charAt(partStart + 1) === "@") {
+                            state = 2 /* Scope */;
+                        }
+                        else {
+                            packageRootIndex = partEnd;
+                            state = 3 /* PackageContent */;
+                        }
+                        break;
+                    case 3 /* PackageContent */:
+                        if (fullPath.indexOf("/node_modules/", partStart) === partStart) {
+                            state = 1 /* NodeModules */;
+                        }
+                        else {
+                            state = 3 /* PackageContent */;
+                        }
+                        break;
+                }
+            }
+            fileNameIndex = partStart;
+            return state > 1 /* NodeModules */ ? { topLevelNodeModulesIndex: topLevelNodeModulesIndex, topLevelPackageNameIndex: topLevelPackageNameIndex, packageRootIndex: packageRootIndex, fileNameIndex: fileNameIndex } : undefined;
+        }
+        function getPathRelativeToRootDirs(path, rootDirs, getCanonicalFileName) {
+            return ts.firstDefined(rootDirs, function (rootDir) {
+                var relativePath = getRelativePathIfInDirectory(path, rootDir, getCanonicalFileName); // TODO: GH#18217
+                return isPathRelativeToParent(relativePath) ? undefined : relativePath;
+            });
+        }
+        function removeExtensionAndIndexPostFix(fileName, moduleResolutionKind, addJsExtension) {
+            var noExtension = ts.removeFileExtension(fileName);
+            return addJsExtension
+                ? noExtension + ".js"
+                : moduleResolutionKind === ts.ModuleResolutionKind.NodeJs
+                    ? ts.removeSuffix(noExtension, "/index")
+                    : noExtension;
+        }
+        function getRelativePathIfInDirectory(path, directoryPath, getCanonicalFileName) {
+            var relativePath = ts.getRelativePathToDirectoryOrUrl(directoryPath, path, directoryPath, getCanonicalFileName, /*isAbsolutePathAnUrl*/ false);
+            return ts.isRootedDiskPath(relativePath) ? undefined : relativePath;
+        }
+        function isPathRelativeToParent(path) {
+            return ts.startsWith(path, "..");
+        }
+    })(moduleSpecifiers = ts.moduleSpecifiers || (ts.moduleSpecifiers = {}));
+})(ts || (ts = {}));
+/*@internal*/
+var ts;
+(function (ts) {
+    var sysFormatDiagnosticsHost = ts.sys ? {
+        getCurrentDirectory: function () { return ts.sys.getCurrentDirectory(); },
+        getNewLine: function () { return ts.sys.newLine; },
+        getCanonicalFileName: ts.createGetCanonicalFileName(ts.sys.useCaseSensitiveFileNames)
+    } : undefined; // TODO: GH#18217
+    /**
+     * Create a function that reports error by writing to the system and handles the formating of the diagnostic
+     */
+    function createDiagnosticReporter(system, pretty) {
+        var host = system === ts.sys ? sysFormatDiagnosticsHost : {
+            getCurrentDirectory: function () { return system.getCurrentDirectory(); },
+            getNewLine: function () { return system.newLine; },
+            getCanonicalFileName: ts.createGetCanonicalFileName(system.useCaseSensitiveFileNames),
+        };
+        if (!pretty) {
+            return function (diagnostic) { return system.write(ts.formatDiagnostic(diagnostic, host)); };
+        }
+        var diagnostics = new Array(1);
+        return function (diagnostic) {
+            diagnostics[0] = diagnostic;
+            system.write(ts.formatDiagnosticsWithColorAndContext(diagnostics, host) + host.getNewLine());
+            diagnostics[0] = undefined; // TODO: GH#18217
+        };
+    }
+    ts.createDiagnosticReporter = createDiagnosticReporter;
+    /** @internal */
+    ts.nonClearingMessageCodes = [
+        ts.Diagnostics.Found_1_error_Watching_for_file_changes.code,
+        ts.Diagnostics.Found_0_errors_Watching_for_file_changes.code
+    ];
+    /**
+     * @returns Whether the screen was cleared.
+     */
+    function clearScreenIfNotWatchingForFileChanges(system, diagnostic, options) {
+        if (system.clearScreen &&
+            !options.preserveWatchOutput &&
+            !options.extendedDiagnostics &&
+            !options.diagnostics &&
+            !ts.contains(ts.nonClearingMessageCodes, diagnostic.code)) {
+            system.clearScreen();
+            return true;
+        }
+        return false;
+    }
+    /** @internal */
+    ts.screenStartingMessageCodes = [
+        ts.Diagnostics.Starting_compilation_in_watch_mode.code,
+        ts.Diagnostics.File_change_detected_Starting_incremental_compilation.code,
+    ];
+    function getPlainDiagnosticFollowingNewLines(diagnostic, newLine) {
+        return ts.contains(ts.screenStartingMessageCodes, diagnostic.code)
+            ? newLine + newLine
+            : newLine;
+    }
+    /**
+     * Create a function that reports watch status by writing to the system and handles the formating of the diagnostic
+     */
+    function createWatchStatusReporter(system, pretty) {
+        return pretty ?
+            function (diagnostic, newLine, options) {
+                clearScreenIfNotWatchingForFileChanges(system, diagnostic, options);
+                var output = "[" + ts.formatColorAndReset(new Date().toLocaleTimeString(), ts.ForegroundColorEscapeSequences.Grey) + "] ";
+                output += "" + ts.flattenDiagnosticMessageText(diagnostic.messageText, system.newLine) + (newLine + newLine);
+                system.write(output);
+            } :
+            function (diagnostic, newLine, options) {
+                var output = "";
+                if (!clearScreenIfNotWatchingForFileChanges(system, diagnostic, options)) {
+                    output += newLine;
+                }
+                output += new Date().toLocaleTimeString() + " - ";
+                output += "" + ts.flattenDiagnosticMessageText(diagnostic.messageText, system.newLine) + getPlainDiagnosticFollowingNewLines(diagnostic, newLine);
+                system.write(output);
+            };
+    }
+    ts.createWatchStatusReporter = createWatchStatusReporter;
+    /** Parses config file using System interface */
+    function parseConfigFileWithSystem(configFileName, optionsToExtend, system, reportDiagnostic) {
+        var host = system;
+        host.onUnRecoverableConfigFileDiagnostic = function (diagnostic) { return reportUnrecoverableDiagnostic(ts.sys, reportDiagnostic, diagnostic); };
+        var result = ts.getParsedCommandLineOfConfigFile(configFileName, optionsToExtend, host);
+        host.onUnRecoverableConfigFileDiagnostic = undefined; // TODO: GH#18217
+        return result;
+    }
+    ts.parseConfigFileWithSystem = parseConfigFileWithSystem;
+    /**
+     * Helper that emit files, report diagnostics and lists emitted and/or source files depending on compiler options
+     */
+    function emitFilesAndReportErrors(program, reportDiagnostic, writeFileName, reportSummary) {
+        // First get and report any syntactic errors.
+        var diagnostics = program.getConfigFileParsingDiagnostics().slice();
+        var configFileParsingDiagnosticsLength = diagnostics.length;
+        ts.addRange(diagnostics, program.getSyntacticDiagnostics());
+        var reportSemanticDiagnostics = false;
+        // If we didn't have any syntactic errors, then also try getting the global and
+        // semantic errors.
+        if (diagnostics.length === configFileParsingDiagnosticsLength) {
+            ts.addRange(diagnostics, program.getOptionsDiagnostics());
+            ts.addRange(diagnostics, program.getGlobalDiagnostics());
+            if (diagnostics.length === configFileParsingDiagnosticsLength) {
+                reportSemanticDiagnostics = true;
+            }
+        }
+        // Emit and report any errors we ran into.
+        var _a = program.emit(), emittedFiles = _a.emittedFiles, emitSkipped = _a.emitSkipped, emitDiagnostics = _a.diagnostics;
+        ts.addRange(diagnostics, emitDiagnostics);
+        if (reportSemanticDiagnostics) {
+            ts.addRange(diagnostics, program.getSemanticDiagnostics());
+        }
+        ts.sortAndDeduplicateDiagnostics(diagnostics).forEach(reportDiagnostic);
+        if (writeFileName) {
+            var currentDir_1 = program.getCurrentDirectory();
+            ts.forEach(emittedFiles, function (file) {
+                var filepath = ts.getNormalizedAbsolutePath(file, currentDir_1);
+                writeFileName("TSFILE: " + filepath);
+            });
+            if (program.getCompilerOptions().listFiles) {
+                ts.forEach(program.getSourceFiles(), function (file) {
+                    writeFileName(file.fileName);
+                });
+            }
+        }
+        if (reportSummary) {
+            reportSummary(diagnostics.filter(function (diagnostic) { return diagnostic.category === ts.DiagnosticCategory.Error; }).length);
+        }
+        if (emitSkipped && diagnostics.length > 0) {
+            // If the emitter didn't emit anything, then pass that value along.
+            return ts.ExitStatus.DiagnosticsPresent_OutputsSkipped;
+        }
+        else if (diagnostics.length > 0) {
+            // The emitter emitted something, inform the caller if that happened in the presence
+            // of diagnostics or not.
+            return ts.ExitStatus.DiagnosticsPresent_OutputsGenerated;
+        }
+        return ts.ExitStatus.Success;
+    }
+    ts.emitFilesAndReportErrors = emitFilesAndReportErrors;
+    var noopFileWatcher = { close: ts.noop };
+    /**
+     * Creates the watch compiler host that can be extended with config file or root file names and options host
+     */
+    function createWatchCompilerHost(system, createProgram, reportDiagnostic, reportWatchStatus) {
+        if (system === void 0) { system = ts.sys; }
+        if (!createProgram) {
+            createProgram = ts.createEmitAndSemanticDiagnosticsBuilderProgram;
+        }
+        var host = system;
+        var useCaseSensitiveFileNames = function () { return system.useCaseSensitiveFileNames; };
+        var writeFileName = function (s) { return system.write(s + system.newLine); };
+        var onWatchStatusChange = reportWatchStatus || createWatchStatusReporter(system);
+        return {
+            useCaseSensitiveFileNames: useCaseSensitiveFileNames,
+            getNewLine: function () { return system.newLine; },
+            getCurrentDirectory: function () { return system.getCurrentDirectory(); },
+            getDefaultLibLocation: getDefaultLibLocation,
+            getDefaultLibFileName: function (options) { return ts.combinePaths(getDefaultLibLocation(), ts.getDefaultLibFileName(options)); },
+            fileExists: function (path) { return system.fileExists(path); },
+            readFile: function (path, encoding) { return system.readFile(path, encoding); },
+            directoryExists: function (path) { return system.directoryExists(path); },
+            getDirectories: function (path) { return system.getDirectories(path); },
+            readDirectory: function (path, extensions, exclude, include, depth) { return system.readDirectory(path, extensions, exclude, include, depth); },
+            realpath: system.realpath && (function (path) { return system.realpath(path); }),
+            getEnvironmentVariable: system.getEnvironmentVariable && (function (name) { return system.getEnvironmentVariable(name); }),
+            watchFile: system.watchFile ? (function (path, callback, pollingInterval) { return system.watchFile(path, callback, pollingInterval); }) : function () { return noopFileWatcher; },
+            watchDirectory: system.watchDirectory ? (function (path, callback, recursive) { return system.watchDirectory(path, callback, recursive); }) : function () { return noopFileWatcher; },
+            setTimeout: system.setTimeout ? (function (callback, ms) {
+                var args = [];
+                for (var _i = 2; _i < arguments.length; _i++) {
+                    args[_i - 2] = arguments[_i];
+                }
+                var _a;
+                return (_a = system.setTimeout).call.apply(_a, [system, callback, ms].concat(args));
+            }) : ts.noop,
+            clearTimeout: system.clearTimeout ? (function (timeoutId) { return system.clearTimeout(timeoutId); }) : ts.noop,
+            trace: function (s) { return system.write(s); },
+            onWatchStatusChange: onWatchStatusChange,
+            createDirectory: function (path) { return system.createDirectory(path); },
+            writeFile: function (path, data, writeByteOrderMark) { return system.writeFile(path, data, writeByteOrderMark); },
+            onCachedDirectoryStructureHostCreate: function (cacheHost) { return host = cacheHost || system; },
+            createHash: system.createHash && (function (s) { return system.createHash(s); }),
+            createProgram: createProgram,
+            afterProgramCreate: emitFilesAndReportErrorUsingBuilder
+        };
+        function getDefaultLibLocation() {
+            return ts.getDirectoryPath(ts.normalizePath(system.getExecutingFilePath()));
+        }
+        function emitFilesAndReportErrorUsingBuilder(builderProgram) {
+            var compilerOptions = builderProgram.getCompilerOptions();
+            var newLine = ts.getNewLineCharacter(compilerOptions, function () { return system.newLine; });
+            var reportSummary = function (errorCount) {
+                if (errorCount === 1) {
+                    onWatchStatusChange(ts.createCompilerDiagnostic(ts.Diagnostics.Found_1_error_Watching_for_file_changes, errorCount), newLine, compilerOptions);
+                }
+                else {
+                    onWatchStatusChange(ts.createCompilerDiagnostic(ts.Diagnostics.Found_0_errors_Watching_for_file_changes, errorCount, errorCount), newLine, compilerOptions);
+                }
+            };
+            emitFilesAndReportErrors(builderProgram, reportDiagnostic, writeFileName, reportSummary);
+        }
+    }
+    /**
+     * Report error and exit
+     */
+    function reportUnrecoverableDiagnostic(system, reportDiagnostic, diagnostic) {
+        reportDiagnostic(diagnostic);
+        system.exit(ts.ExitStatus.DiagnosticsPresent_OutputsSkipped);
+    }
+    /**
+     * Creates the watch compiler host from system for config file in watch mode
+     */
+    function createWatchCompilerHostOfConfigFile(configFileName, optionsToExtend, system, createProgram, reportDiagnostic, reportWatchStatus) {
+        var diagnosticReporter = reportDiagnostic || createDiagnosticReporter(system);
+        var host = createWatchCompilerHost(system, createProgram, diagnosticReporter, reportWatchStatus);
+        host.onUnRecoverableConfigFileDiagnostic = function (diagnostic) { return reportUnrecoverableDiagnostic(system, diagnosticReporter, diagnostic); };
+        host.configFileName = configFileName;
+        host.optionsToExtend = optionsToExtend;
+        return host;
+    }
+    ts.createWatchCompilerHostOfConfigFile = createWatchCompilerHostOfConfigFile;
+    /**
+     * Creates the watch compiler host from system for compiling root files and options in watch mode
+     */
+    function createWatchCompilerHostOfFilesAndCompilerOptions(rootFiles, options, system, createProgram, reportDiagnostic, reportWatchStatus) {
+        var host = createWatchCompilerHost(system, createProgram, reportDiagnostic || createDiagnosticReporter(system), reportWatchStatus);
+        host.rootFiles = rootFiles;
+        host.options = options;
+        return host;
+    }
+    ts.createWatchCompilerHostOfFilesAndCompilerOptions = createWatchCompilerHostOfFilesAndCompilerOptions;
+})(ts || (ts = {}));
+(function (ts) {
+    function createWatchCompilerHost(rootFilesOrConfigFileName, options, system, createProgram, reportDiagnostic, reportWatchStatus) {
+        if (ts.isArray(rootFilesOrConfigFileName)) {
+            return ts.createWatchCompilerHostOfFilesAndCompilerOptions(rootFilesOrConfigFileName, options, system, createProgram, reportDiagnostic, reportWatchStatus); // TODO: GH#18217
+        }
+        else {
+            return ts.createWatchCompilerHostOfConfigFile(rootFilesOrConfigFileName, options, system, createProgram, reportDiagnostic, reportWatchStatus);
+        }
+    }
+    ts.createWatchCompilerHost = createWatchCompilerHost;
+    var initialVersion = 1;
+    function createWatchProgram(host) {
+        var builderProgram;
+        var reloadLevel; // level to indicate if the program needs to be reloaded from config file/just filenames etc
+        var missingFilesMap; // Map of file watchers for the missing files
+        var watchedWildcardDirectories; // map of watchers for the wild card directories in the config file
+        var timerToUpdateProgram; // timer callback to recompile the program
+        var sourceFilesCache = ts.createMap(); // Cache that stores the source file and version info
+        var missingFilePathsRequestedForRelease; // These paths are held temparirly so that we can remove the entry from source file cache if the file is not tracked by missing files
+        var hasChangedCompilerOptions = false; // True if the compiler options have changed between compilations
+        var hasChangedAutomaticTypeDirectiveNames = false; // True if the automatic type directives have changed
+        var useCaseSensitiveFileNames = host.useCaseSensitiveFileNames();
+        var currentDirectory = host.getCurrentDirectory();
+        var getCurrentDirectory = function () { return currentDirectory; };
+        var readFile = function (path, encoding) { return host.readFile(path, encoding); };
+        var configFileName = host.configFileName, _a = host.optionsToExtend, optionsToExtendForConfigFile = _a === void 0 ? {} : _a, createProgram = host.createProgram;
+        var rootFileNames = host.rootFiles, compilerOptions = host.options;
+        var configFileSpecs;
+        var configFileParsingDiagnostics;
+        var hasChangedConfigFileParsingErrors = false;
+        var cachedDirectoryStructureHost = configFileName === undefined ? undefined : ts.createCachedDirectoryStructureHost(host, currentDirectory, useCaseSensitiveFileNames);
+        if (cachedDirectoryStructureHost && host.onCachedDirectoryStructureHostCreate) {
+            host.onCachedDirectoryStructureHostCreate(cachedDirectoryStructureHost);
+        }
+        var directoryStructureHost = cachedDirectoryStructureHost || host;
+        var parseConfigFileHost = {
+            useCaseSensitiveFileNames: useCaseSensitiveFileNames,
+            readDirectory: function (path, extensions, exclude, include, depth) { return directoryStructureHost.readDirectory(path, extensions, exclude, include, depth); },
+            fileExists: function (path) { return host.fileExists(path); },
+            readFile: readFile,
+            getCurrentDirectory: getCurrentDirectory,
+            onUnRecoverableConfigFileDiagnostic: host.onUnRecoverableConfigFileDiagnostic
+        };
+        // From tsc we want to get already parsed result and hence check for rootFileNames
+        var newLine = updateNewLine();
+        reportWatchDiagnostic(ts.Diagnostics.Starting_compilation_in_watch_mode);
+        if (configFileName) {
+            newLine = ts.getNewLineCharacter(optionsToExtendForConfigFile, function () { return host.getNewLine(); });
+            if (host.configFileParsingResult) {
+                setConfigFileParsingResult(host.configFileParsingResult);
+            }
+            else {
+                ts.Debug.assert(!rootFileNames);
+                parseConfigFile();
+            }
+            newLine = updateNewLine();
+        }
+        var trace = host.trace && (function (s) { host.trace(s + newLine); });
+        var watchLogLevel = trace ? compilerOptions.extendedDiagnostics ? ts.WatchLogLevel.Verbose :
+            compilerOptions.diagnostis ? ts.WatchLogLevel.TriggerOnly : ts.WatchLogLevel.None : ts.WatchLogLevel.None;
+        var writeLog = watchLogLevel !== ts.WatchLogLevel.None ? trace : ts.noop; // TODO: GH#18217
+        var _b = ts.getWatchFactory(watchLogLevel, writeLog), watchFile = _b.watchFile, watchFilePath = _b.watchFilePath, watchDirectory = _b.watchDirectory;
+        var getCanonicalFileName = ts.createGetCanonicalFileName(useCaseSensitiveFileNames);
+        writeLog("Current directory: " + currentDirectory + " CaseSensitiveFileNames: " + useCaseSensitiveFileNames);
+        if (configFileName) {
+            watchFile(host, configFileName, scheduleProgramReload, ts.PollingInterval.High, "Config file");
+        }
+        var compilerHost = {
+            // Members for CompilerHost
+            getSourceFile: function (fileName, languageVersion, onError, shouldCreateNewSourceFile) { return getVersionedSourceFileByPath(fileName, toPath(fileName), languageVersion, onError, shouldCreateNewSourceFile); },
+            getSourceFileByPath: getVersionedSourceFileByPath,
+            getDefaultLibLocation: host.getDefaultLibLocation && (function () { return host.getDefaultLibLocation(); }),
+            getDefaultLibFileName: function (options) { return host.getDefaultLibFileName(options); },
+            writeFile: writeFile,
+            getCurrentDirectory: getCurrentDirectory,
+            useCaseSensitiveFileNames: function () { return useCaseSensitiveFileNames; },
+            getCanonicalFileName: getCanonicalFileName,
+            getNewLine: function () { return newLine; },
+            fileExists: fileExists,
+            readFile: readFile,
+            trace: trace,
+            directoryExists: directoryStructureHost.directoryExists && (function (path) { return directoryStructureHost.directoryExists(path); }),
+            getDirectories: (directoryStructureHost.getDirectories && (function (path) { return directoryStructureHost.getDirectories(path); })),
+            realpath: host.realpath && (function (s) { return host.realpath(s); }),
+            getEnvironmentVariable: host.getEnvironmentVariable ? (function (name) { return host.getEnvironmentVariable(name); }) : (function () { return ""; }),
+            onReleaseOldSourceFile: onReleaseOldSourceFile,
+            createHash: host.createHash && (function (data) { return host.createHash(data); }),
+            // Members for ResolutionCacheHost
+            toPath: toPath,
+            getCompilationSettings: function () { return compilerOptions; },
+            watchDirectoryOfFailedLookupLocation: function (dir, cb, flags) { return watchDirectory(host, dir, cb, flags, "Failed Lookup Locations"); },
+            watchTypeRootsDirectory: function (dir, cb, flags) { return watchDirectory(host, dir, cb, flags, "Type roots"); },
+            getCachedDirectoryStructureHost: function () { return cachedDirectoryStructureHost; },
+            onInvalidatedResolution: scheduleProgramUpdate,
+            onChangedAutomaticTypeDirectiveNames: function () {
+                hasChangedAutomaticTypeDirectiveNames = true;
+                scheduleProgramUpdate();
+            },
+            maxNumberOfFilesToIterateForInvalidation: host.maxNumberOfFilesToIterateForInvalidation,
+            getCurrentProgram: getCurrentProgram,
+            writeLog: writeLog
+        };
+        // Cache for the module resolution
+        var resolutionCache = ts.createResolutionCache(compilerHost, configFileName ?
+            ts.getDirectoryPath(ts.getNormalizedAbsolutePath(configFileName, currentDirectory)) :
+            currentDirectory, 
+        /*logChangesWhenResolvingModule*/ false);
+        // Resolve module using host module resolution strategy if provided otherwise use resolution cache to resolve module names
+        compilerHost.resolveModuleNames = host.resolveModuleNames ?
+            (function (moduleNames, containingFile, reusedNames) { return host.resolveModuleNames(moduleNames, containingFile, reusedNames); }) :
+            (function (moduleNames, containingFile, reusedNames) { return resolutionCache.resolveModuleNames(moduleNames, containingFile, reusedNames); });
+        compilerHost.resolveTypeReferenceDirectives = host.resolveTypeReferenceDirectives ?
+            (function (typeDirectiveNames, containingFile) { return host.resolveTypeReferenceDirectives(typeDirectiveNames, containingFile); }) :
+            (function (typeDirectiveNames, containingFile) { return resolutionCache.resolveTypeReferenceDirectives(typeDirectiveNames, containingFile); });
+        var userProvidedResolution = !!host.resolveModuleNames || !!host.resolveTypeReferenceDirectives;
+        synchronizeProgram();
+        // Update the wild card directory watch
+        watchConfigFileWildCardDirectories();
+        return configFileName ?
+            { getCurrentProgram: getCurrentBuilderProgram, getProgram: synchronizeProgram } :
+            { getCurrentProgram: getCurrentBuilderProgram, getProgram: synchronizeProgram, updateRootFileNames: updateRootFileNames };
+        function getCurrentBuilderProgram() {
+            return builderProgram;
+        }
+        function getCurrentProgram() {
+            return builderProgram && builderProgram.getProgram();
+        }
+        function synchronizeProgram() {
+            writeLog("Synchronizing program");
+            var program = getCurrentProgram();
+            if (hasChangedCompilerOptions) {
+                newLine = updateNewLine();
+                if (program && ts.changesAffectModuleResolution(program.getCompilerOptions(), compilerOptions)) {
+                    resolutionCache.clear();
+                }
+            }
+            // All resolutions are invalid if user provided resolutions
+            var hasInvalidatedResolution = resolutionCache.createHasInvalidatedResolution(userProvidedResolution);
+            if (ts.isProgramUptoDate(getCurrentProgram(), rootFileNames, compilerOptions, getSourceVersion, fileExists, hasInvalidatedResolution, hasChangedAutomaticTypeDirectiveNames)) {
+                if (hasChangedConfigFileParsingErrors) {
+                    builderProgram = createProgram(/*rootNames*/ undefined, /*options*/ undefined, compilerHost, builderProgram, configFileParsingDiagnostics);
+                    hasChangedConfigFileParsingErrors = false;
+                }
+            }
+            else {
+                createNewProgram(program, hasInvalidatedResolution);
+            }
+            if (host.afterProgramCreate) {
+                host.afterProgramCreate(builderProgram);
+            }
+            return builderProgram;
+        }
+        function createNewProgram(program, hasInvalidatedResolution) {
+            // Compile the program
+            if (watchLogLevel !== ts.WatchLogLevel.None) {
+                writeLog("CreatingProgramWith::");
+                writeLog("  roots: " + JSON.stringify(rootFileNames));
+                writeLog("  options: " + JSON.stringify(compilerOptions));
+            }
+            var needsUpdateInTypeRootWatch = hasChangedCompilerOptions || !program;
+            hasChangedCompilerOptions = false;
+            hasChangedConfigFileParsingErrors = false;
+            resolutionCache.startCachingPerDirectoryResolution();
+            compilerHost.hasInvalidatedResolution = hasInvalidatedResolution;
+            compilerHost.hasChangedAutomaticTypeDirectiveNames = hasChangedAutomaticTypeDirectiveNames;
+            builderProgram = createProgram(rootFileNames, compilerOptions, compilerHost, builderProgram, configFileParsingDiagnostics);
+            resolutionCache.finishCachingPerDirectoryResolution();
+            // Update watches
+            ts.updateMissingFilePathsWatch(builderProgram.getProgram(), missingFilesMap || (missingFilesMap = ts.createMap()), watchMissingFilePath);
+            if (needsUpdateInTypeRootWatch) {
+                resolutionCache.updateTypeRootsWatch();
+            }
+            if (missingFilePathsRequestedForRelease) {
+                // These are the paths that program creater told us as not in use any more but were missing on the disk.
+                // We didnt remove the entry for them from sourceFiles cache so that we dont have to do File IO,
+                // if there is already watcher for it (for missing files)
+                // At this point our watches were updated, hence now we know that these paths are not tracked and need to be removed
+                // so that at later time we have correct result of their presence
+                for (var _i = 0, missingFilePathsRequestedForRelease_1 = missingFilePathsRequestedForRelease; _i < missingFilePathsRequestedForRelease_1.length; _i++) {
+                    var missingFilePath = missingFilePathsRequestedForRelease_1[_i];
+                    if (!missingFilesMap.has(missingFilePath)) {
+                        sourceFilesCache.delete(missingFilePath);
+                    }
+                }
+                missingFilePathsRequestedForRelease = undefined;
+            }
+        }
+        function updateRootFileNames(files) {
+            ts.Debug.assert(!configFileName, "Cannot update root file names with config file watch mode");
+            rootFileNames = files;
+            scheduleProgramUpdate();
+        }
+        function updateNewLine() {
+            return ts.getNewLineCharacter(compilerOptions || optionsToExtendForConfigFile, function () { return host.getNewLine(); });
+        }
+        function toPath(fileName) {
+            return ts.toPath(fileName, currentDirectory, getCanonicalFileName);
+        }
+        function isFileMissingOnHost(hostSourceFile) {
+            return typeof hostSourceFile === "number";
+        }
+        function isFilePresentOnHost(hostSourceFile) {
+            return !!hostSourceFile.sourceFile;
+        }
+        function fileExists(fileName) {
+            var path = toPath(fileName);
+            // If file is missing on host from cache, we can definitely say file doesnt exist
+            // otherwise we need to ensure from the disk
+            if (isFileMissingOnHost(sourceFilesCache.get(path))) {
+                return true;
+            }
+            return directoryStructureHost.fileExists(fileName);
+        }
+        function getVersionedSourceFileByPath(fileName, path, languageVersion, onError, shouldCreateNewSourceFile) {
+            var hostSourceFile = sourceFilesCache.get(path);
+            // No source file on the host
+            if (isFileMissingOnHost(hostSourceFile)) {
+                return undefined;
+            }
+            // Create new source file if requested or the versions dont match
+            if (!hostSourceFile || shouldCreateNewSourceFile || !isFilePresentOnHost(hostSourceFile) || hostSourceFile.version.toString() !== hostSourceFile.sourceFile.version) {
+                var sourceFile = getNewSourceFile();
+                if (hostSourceFile) {
+                    if (shouldCreateNewSourceFile) {
+                        hostSourceFile.version++;
+                    }
+                    if (sourceFile) {
+                        // Set the source file and create file watcher now that file was present on the disk
+                        hostSourceFile.sourceFile = sourceFile;
+                        sourceFile.version = hostSourceFile.version.toString();
+                        if (!hostSourceFile.fileWatcher) {
+                            hostSourceFile.fileWatcher = watchFilePath(host, fileName, onSourceFileChange, ts.PollingInterval.Low, path, "Source file");
+                        }
+                    }
+                    else {
+                        // There is no source file on host any more, close the watch, missing file paths will track it
+                        if (isFilePresentOnHost(hostSourceFile)) {
+                            hostSourceFile.fileWatcher.close();
+                        }
+                        sourceFilesCache.set(path, hostSourceFile.version);
+                    }
+                }
+                else {
+                    if (sourceFile) {
+                        sourceFile.version = initialVersion.toString();
+                        var fileWatcher = watchFilePath(host, fileName, onSourceFileChange, ts.PollingInterval.Low, path, "Source file");
+                        sourceFilesCache.set(path, { sourceFile: sourceFile, version: initialVersion, fileWatcher: fileWatcher });
+                    }
+                    else {
+                        sourceFilesCache.set(path, initialVersion);
+                    }
+                }
+                return sourceFile;
+            }
+            return hostSourceFile.sourceFile;
+            function getNewSourceFile() {
+                var text;
+                try {
+                    ts.performance.mark("beforeIORead");
+                    text = host.readFile(fileName, compilerOptions.charset);
+                    ts.performance.mark("afterIORead");
+                    ts.performance.measure("I/O Read", "beforeIORead", "afterIORead");
+                }
+                catch (e) {
+                    if (onError) {
+                        onError(e.message);
+                    }
+                }
+                return text !== undefined ? ts.createSourceFile(fileName, text, languageVersion) : undefined;
+            }
+        }
+        function nextSourceFileVersion(path) {
+            var hostSourceFile = sourceFilesCache.get(path);
+            if (hostSourceFile !== undefined) {
+                if (isFileMissingOnHost(hostSourceFile)) {
+                    // The next version, lets set it as presence unknown file
+                    sourceFilesCache.set(path, { version: Number(hostSourceFile) + 1 });
+                }
+                else {
+                    hostSourceFile.version++;
+                }
+            }
+        }
+        function getSourceVersion(path) {
+            var hostSourceFile = sourceFilesCache.get(path);
+            return !hostSourceFile || isFileMissingOnHost(hostSourceFile) ? undefined : hostSourceFile.version.toString();
+        }
+        function onReleaseOldSourceFile(oldSourceFile, _oldOptions) {
+            var hostSourceFileInfo = sourceFilesCache.get(oldSourceFile.path);
+            // If this is the source file thats in the cache and new program doesnt need it,
+            // remove the cached entry.
+            // Note we arent deleting entry if file became missing in new program or
+            // there was version update and new source file was created.
+            if (hostSourceFileInfo) {
+                // record the missing file paths so they can be removed later if watchers arent tracking them
+                if (isFileMissingOnHost(hostSourceFileInfo)) {
+                    (missingFilePathsRequestedForRelease || (missingFilePathsRequestedForRelease = [])).push(oldSourceFile.path);
+                }
+                else if (hostSourceFileInfo.sourceFile === oldSourceFile) {
+                    if (hostSourceFileInfo.fileWatcher) {
+                        hostSourceFileInfo.fileWatcher.close();
+                    }
+                    sourceFilesCache.delete(oldSourceFile.path);
+                    resolutionCache.removeResolutionsOfFile(oldSourceFile.path);
+                }
+            }
+        }
+        function reportWatchDiagnostic(message) {
+            if (host.onWatchStatusChange) {
+                host.onWatchStatusChange(ts.createCompilerDiagnostic(message), newLine, compilerOptions || optionsToExtendForConfigFile);
+            }
+        }
+        // Upon detecting a file change, wait for 250ms and then perform a recompilation. This gives batch
+        // operations (such as saving all modified files in an editor) a chance to complete before we kick
+        // off a new compilation.
+        function scheduleProgramUpdate() {
+            if (!host.setTimeout || !host.clearTimeout) {
+                return;
+            }
+            if (timerToUpdateProgram) {
+                host.clearTimeout(timerToUpdateProgram);
+            }
+            writeLog("Scheduling update");
+            timerToUpdateProgram = host.setTimeout(updateProgram, 250);
+        }
+        function scheduleProgramReload() {
+            ts.Debug.assert(!!configFileName);
+            reloadLevel = ts.ConfigFileProgramReloadLevel.Full;
+            scheduleProgramUpdate();
+        }
+        function updateProgram() {
+            timerToUpdateProgram = undefined;
+            reportWatchDiagnostic(ts.Diagnostics.File_change_detected_Starting_incremental_compilation);
+            switch (reloadLevel) {
+                case ts.ConfigFileProgramReloadLevel.Partial:
+                    return reloadFileNamesFromConfigFile();
+                case ts.ConfigFileProgramReloadLevel.Full:
+                    return reloadConfigFile();
+                default:
+                    synchronizeProgram();
+                    return;
+            }
+        }
+        function reloadFileNamesFromConfigFile() {
+            writeLog("Reloading new file names and options");
+            var result = ts.getFileNamesFromConfigSpecs(configFileSpecs, ts.getDirectoryPath(configFileName), compilerOptions, parseConfigFileHost);
+            if (result.fileNames.length) {
+                configFileParsingDiagnostics = ts.filter(configFileParsingDiagnostics, function (error) { return !ts.isErrorNoInputFiles(error); });
+                hasChangedConfigFileParsingErrors = true;
+            }
+            else if (!configFileSpecs.filesSpecs && !ts.some(configFileParsingDiagnostics, ts.isErrorNoInputFiles)) {
+                configFileParsingDiagnostics = configFileParsingDiagnostics.concat(ts.getErrorForNoInputFiles(configFileSpecs, configFileName));
+                hasChangedConfigFileParsingErrors = true;
+            }
+            rootFileNames = result.fileNames;
+            // Update the program
+            synchronizeProgram();
+        }
+        function reloadConfigFile() {
+            writeLog("Reloading config file: " + configFileName);
+            reloadLevel = ts.ConfigFileProgramReloadLevel.None;
+            if (cachedDirectoryStructureHost) {
+                cachedDirectoryStructureHost.clearCache();
+            }
+            parseConfigFile();
+            hasChangedCompilerOptions = true;
+            synchronizeProgram();
+            // Update the wild card directory watch
+            watchConfigFileWildCardDirectories();
+        }
+        function parseConfigFile() {
+            setConfigFileParsingResult(ts.getParsedCommandLineOfConfigFile(configFileName, optionsToExtendForConfigFile, parseConfigFileHost)); // TODO: GH#18217
+        }
+        function setConfigFileParsingResult(configFileParseResult) {
+            rootFileNames = configFileParseResult.fileNames;
+            compilerOptions = configFileParseResult.options;
+            configFileSpecs = configFileParseResult.configFileSpecs; // TODO: GH#18217
+            configFileParsingDiagnostics = ts.getConfigFileParsingDiagnostics(configFileParseResult);
+            hasChangedConfigFileParsingErrors = true;
+        }
+        function onSourceFileChange(fileName, eventKind, path) {
+            updateCachedSystemWithFile(fileName, path, eventKind);
+            // Update the source file cache
+            if (eventKind === ts.FileWatcherEventKind.Deleted && sourceFilesCache.get(path)) {
+                resolutionCache.invalidateResolutionOfFile(path);
+            }
+            nextSourceFileVersion(path);
+            // Update the program
+            scheduleProgramUpdate();
+        }
+        function updateCachedSystemWithFile(fileName, path, eventKind) {
+            if (cachedDirectoryStructureHost) {
+                cachedDirectoryStructureHost.addOrDeleteFile(fileName, path, eventKind);
+            }
+        }
+        function watchMissingFilePath(missingFilePath) {
+            return watchFilePath(host, missingFilePath, onMissingFileChange, ts.PollingInterval.Medium, missingFilePath, "Missing file");
+        }
+        function onMissingFileChange(fileName, eventKind, missingFilePath) {
+            updateCachedSystemWithFile(fileName, missingFilePath, eventKind);
+            if (eventKind === ts.FileWatcherEventKind.Created && missingFilesMap.has(missingFilePath)) {
+                missingFilesMap.get(missingFilePath).close();
+                missingFilesMap.delete(missingFilePath);
+                // Delete the entry in the source files cache so that new source file is created
+                nextSourceFileVersion(missingFilePath);
+                // When a missing file is created, we should update the graph.
+                scheduleProgramUpdate();
+            }
+        }
+        function watchConfigFileWildCardDirectories() {
+            if (configFileSpecs) {
+                ts.updateWatchingWildcardDirectories(watchedWildcardDirectories || (watchedWildcardDirectories = ts.createMap()), ts.createMapFromTemplate(configFileSpecs.wildcardDirectories), watchWildcardDirectory);
+            }
+            else if (watchedWildcardDirectories) {
+                ts.clearMap(watchedWildcardDirectories, ts.closeFileWatcherOf);
+            }
+        }
+        function watchWildcardDirectory(directory, flags) {
+            return watchDirectory(host, directory, function (fileOrDirectory) {
+                ts.Debug.assert(!!configFileName);
+                var fileOrDirectoryPath = toPath(fileOrDirectory);
+                // Since the file existance changed, update the sourceFiles cache
+                if (cachedDirectoryStructureHost) {
+                    cachedDirectoryStructureHost.addOrDeleteFileOrDirectory(fileOrDirectory, fileOrDirectoryPath);
+                }
+                nextSourceFileVersion(fileOrDirectoryPath);
+                // If the the added or created file or directory is not supported file name, ignore the file
+                // But when watched directory is added/removed, we need to reload the file list
+                if (fileOrDirectoryPath !== directory && ts.hasExtension(fileOrDirectoryPath) && !ts.isSupportedSourceFileName(fileOrDirectory, compilerOptions)) {
+                    writeLog("Project: " + configFileName + " Detected file add/remove of non supported extension: " + fileOrDirectory);
+                    return;
+                }
+                // Reload is pending, do the reload
+                if (reloadLevel !== ts.ConfigFileProgramReloadLevel.Full) {
+                    reloadLevel = ts.ConfigFileProgramReloadLevel.Partial;
+                    // Schedule Update the program
+                    scheduleProgramUpdate();
+                }
+            }, flags, "Wild card directories");
+        }
+        function ensureDirectoriesExist(directoryPath) {
+            if (directoryPath.length > ts.getRootLength(directoryPath) && !host.directoryExists(directoryPath)) {
+                var parentDirectory = ts.getDirectoryPath(directoryPath);
+                ensureDirectoriesExist(parentDirectory);
+                host.createDirectory(directoryPath);
+            }
+        }
+        function writeFile(fileName, text, writeByteOrderMark, onError) {
+            try {
+                ts.performance.mark("beforeIOWrite");
+                ensureDirectoriesExist(ts.getDirectoryPath(ts.normalizePath(fileName)));
+                host.writeFile(fileName, text, writeByteOrderMark);
+                ts.performance.mark("afterIOWrite");
+                ts.performance.measure("I/O Write", "beforeIOWrite", "afterIOWrite");
+            }
+            catch (e) {
+                if (onError) {
+                    onError(e.message);
+                }
+            }
+        }
+    }
+    ts.createWatchProgram = createWatchProgram;
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var minimumDate = new Date(-8640000000000000);
+    var maximumDate = new Date(8640000000000000);
+    var BuildResultFlags;
+    (function (BuildResultFlags) {
+        BuildResultFlags[BuildResultFlags["None"] = 0] = "None";
+        /**
+         * No errors of any kind occurred during build
+         */
+        BuildResultFlags[BuildResultFlags["Success"] = 1] = "Success";
+        /**
+         * None of the .d.ts files emitted by this build were
+         * different from the existing files on disk
+         */
+        BuildResultFlags[BuildResultFlags["DeclarationOutputUnchanged"] = 2] = "DeclarationOutputUnchanged";
+        BuildResultFlags[BuildResultFlags["ConfigFileErrors"] = 4] = "ConfigFileErrors";
+        BuildResultFlags[BuildResultFlags["SyntaxErrors"] = 8] = "SyntaxErrors";
+        BuildResultFlags[BuildResultFlags["TypeErrors"] = 16] = "TypeErrors";
+        BuildResultFlags[BuildResultFlags["DeclarationEmitErrors"] = 32] = "DeclarationEmitErrors";
+        BuildResultFlags[BuildResultFlags["AnyErrors"] = 60] = "AnyErrors";
+    })(BuildResultFlags || (BuildResultFlags = {}));
+    var UpToDateStatusType;
+    (function (UpToDateStatusType) {
+        UpToDateStatusType[UpToDateStatusType["Unbuildable"] = 0] = "Unbuildable";
+        UpToDateStatusType[UpToDateStatusType["UpToDate"] = 1] = "UpToDate";
+        /**
+         * The project appears out of date because its upstream inputs are newer than its outputs,
+         * but all of its outputs are actually newer than the previous identical outputs of its (.d.ts) inputs.
+         * This means we can Pseudo-build (just touch timestamps), as if we had actually built this project.
+         */
+        UpToDateStatusType[UpToDateStatusType["UpToDateWithUpstreamTypes"] = 2] = "UpToDateWithUpstreamTypes";
+        UpToDateStatusType[UpToDateStatusType["OutputMissing"] = 3] = "OutputMissing";
+        UpToDateStatusType[UpToDateStatusType["OutOfDateWithSelf"] = 4] = "OutOfDateWithSelf";
+        UpToDateStatusType[UpToDateStatusType["OutOfDateWithUpstream"] = 5] = "OutOfDateWithUpstream";
+        UpToDateStatusType[UpToDateStatusType["UpstreamOutOfDate"] = 6] = "UpstreamOutOfDate";
+        UpToDateStatusType[UpToDateStatusType["UpstreamBlocked"] = 7] = "UpstreamBlocked";
+        /**
+         * Projects with no outputs (i.e. "solution" files)
+         */
+        UpToDateStatusType[UpToDateStatusType["ContainerOnly"] = 8] = "ContainerOnly";
+    })(UpToDateStatusType = ts.UpToDateStatusType || (ts.UpToDateStatusType = {}));
+    /**
+     * A FileMap maintains a normalized-key to value relationship
+     */
+    function createFileMap() {
+        // tslint:disable-next-line:no-null-keyword
+        var lookup = ts.createMap();
+        return {
+            setValue: setValue,
+            getValue: getValue,
+            getValueOrUndefined: getValueOrUndefined,
+            removeKey: removeKey,
+            getKeys: getKeys,
+            hasKey: hasKey
+        };
+        function getKeys() {
+            return Object.keys(lookup);
+        }
+        function hasKey(fileName) {
+            return lookup.has(ts.normalizePath(fileName));
+        }
+        function removeKey(fileName) {
+            lookup.delete(ts.normalizePath(fileName));
+        }
+        function setValue(fileName, value) {
+            lookup.set(ts.normalizePath(fileName), value);
+        }
+        function getValue(fileName) {
+            var f = ts.normalizePath(fileName);
+            if (lookup.has(f)) {
+                return lookup.get(f);
+            }
+            else {
+                throw new Error("No value corresponding to " + fileName + " exists in this map");
+            }
+        }
+        function getValueOrUndefined(fileName) {
+            var f = ts.normalizePath(fileName);
+            return lookup.get(f);
+        }
+    }
+    function createDependencyMapper() {
+        var childToParents = createFileMap();
+        var parentToChildren = createFileMap();
+        var allKeys = createFileMap();
+        function addReference(childConfigFileName, parentConfigFileName) {
+            addEntry(childToParents, childConfigFileName, parentConfigFileName);
+            addEntry(parentToChildren, parentConfigFileName, childConfigFileName);
+        }
+        function getReferencesTo(parentConfigFileName) {
+            return parentToChildren.getValueOrUndefined(parentConfigFileName) || [];
+        }
+        function getReferencesOf(childConfigFileName) {
+            return childToParents.getValueOrUndefined(childConfigFileName) || [];
+        }
+        function getKeys() {
+            return allKeys.getKeys();
+        }
+        function addEntry(mapToAddTo, key, element) {
+            key = ts.normalizePath(key);
+            element = ts.normalizePath(element);
+            var arr = mapToAddTo.getValueOrUndefined(key);
+            if (arr === undefined) {
+                mapToAddTo.setValue(key, arr = []);
+            }
+            if (arr.indexOf(element) < 0) {
+                arr.push(element);
+            }
+            allKeys.setValue(key, true);
+            allKeys.setValue(element, true);
+        }
+        return {
+            addReference: addReference,
+            getReferencesTo: getReferencesTo,
+            getReferencesOf: getReferencesOf,
+            getKeys: getKeys
+        };
+    }
+    function getOutputDeclarationFileName(inputFileName, configFile) {
+        var relativePath = ts.getRelativePathFromDirectory(rootDirOfOptions(configFile.options, configFile.options.configFilePath), inputFileName, /*ignoreCase*/ true);
+        var outputPath = ts.resolvePath(configFile.options.declarationDir || configFile.options.outDir || ts.getDirectoryPath(configFile.options.configFilePath), relativePath);
+        return ts.changeExtension(outputPath, ".d.ts" /* Dts */);
+    }
+    function getOutputJavaScriptFileName(inputFileName, configFile) {
+        var relativePath = ts.getRelativePathFromDirectory(rootDirOfOptions(configFile.options, configFile.options.configFilePath), inputFileName, /*ignoreCase*/ true);
+        var outputPath = ts.resolvePath(configFile.options.outDir || ts.getDirectoryPath(configFile.options.configFilePath), relativePath);
+        return ts.changeExtension(outputPath, (ts.fileExtensionIs(inputFileName, ".tsx" /* Tsx */) && configFile.options.jsx === 1 /* Preserve */) ? ".jsx" /* Jsx */ : ".js" /* Js */);
+    }
+    function getOutputFileNames(inputFileName, configFile) {
+        if (configFile.options.outFile) {
+            return ts.emptyArray;
+        }
+        var outputs = [];
+        outputs.push(getOutputJavaScriptFileName(inputFileName, configFile));
+        if (configFile.options.declaration) {
+            var dts = outputs.push(getOutputDeclarationFileName(inputFileName, configFile));
+            if (configFile.options.declarationMap) {
+                outputs.push(dts + ".map");
+            }
+        }
+        return outputs;
+    }
+    function getOutFileOutputs(project) {
+        if (!project.options.outFile) {
+            return ts.Debug.fail("outFile must be set");
+        }
+        var outputs = [];
+        outputs.push(project.options.outFile);
+        if (project.options.declaration) {
+            var dts = ts.changeExtension(project.options.outFile, ".d.ts" /* Dts */);
+            outputs.push(dts);
+            if (project.options.declarationMap) {
+                outputs.push(dts + ".map");
+            }
+        }
+        return outputs;
+    }
+    function rootDirOfOptions(opts, configFileName) {
+        return opts.rootDir || ts.getDirectoryPath(configFileName);
+    }
+    function createConfigFileCache(host) {
+        var cache = createFileMap();
+        var configParseHost = ts.parseConfigHostFromCompilerHost(host);
+        function parseConfigFile(configFilePath) {
+            var sourceFile = host.getSourceFile(configFilePath, 100 /* JSON */);
+            if (sourceFile === undefined) {
+                return undefined;
+            }
+            var parsed = ts.parseJsonSourceFileConfigFileContent(sourceFile, configParseHost, ts.getDirectoryPath(configFilePath));
+            parsed.options.configFilePath = configFilePath;
+            cache.setValue(configFilePath, parsed);
+            return parsed;
+        }
+        function removeKey(configFilePath) {
+            cache.removeKey(configFilePath);
+        }
+        return {
+            parseConfigFile: parseConfigFile,
+            removeKey: removeKey
+        };
+    }
+    function newer(date1, date2) {
+        return date2 > date1 ? date2 : date1;
+    }
+    function isDeclarationFile(fileName) {
+        return ts.fileExtensionIs(fileName, ".d.ts" /* Dts */);
+    }
+    function createBuildContext(options) {
+        var invalidatedProjects = createFileMap();
+        var queuedProjects = createFileMap();
+        var missingRoots = ts.createMap();
+        return {
+            options: options,
+            projectStatus: createFileMap(),
+            unchangedOutputs: createFileMap(),
+            invalidatedProjects: invalidatedProjects,
+            missingRoots: missingRoots,
+            queuedProjects: queuedProjects
+        };
+    }
+    ts.createBuildContext = createBuildContext;
+    var buildOpts = [
+        {
+            name: "verbose",
+            shortName: "v",
+            category: ts.Diagnostics.Command_line_Options,
+            description: ts.Diagnostics.Enable_verbose_logging,
+            type: "boolean"
+        },
+        {
+            name: "dry",
+            shortName: "d",
+            category: ts.Diagnostics.Command_line_Options,
+            description: ts.Diagnostics.Show_what_would_be_built_or_deleted_if_specified_with_clean,
+            type: "boolean"
+        },
+        {
+            name: "force",
+            shortName: "f",
+            category: ts.Diagnostics.Command_line_Options,
+            description: ts.Diagnostics.Build_all_projects_including_those_that_appear_to_be_up_to_date,
+            type: "boolean"
+        },
+        {
+            name: "clean",
+            category: ts.Diagnostics.Command_line_Options,
+            description: ts.Diagnostics.Delete_the_outputs_of_all_projects,
+            type: "boolean"
+        },
+        {
+            name: "watch",
+            category: ts.Diagnostics.Command_line_Options,
+            description: ts.Diagnostics.Watch_input_files,
+            type: "boolean"
+        }
+    ];
+    function performBuild(args, compilerHost, buildHost, system) {
+        var verbose = false;
+        var dry = false;
+        var force = false;
+        var clean = false;
+        var watch = false;
+        var projects = [];
+        for (var _i = 0, args_6 = args; _i < args_6.length; _i++) {
+            var arg = args_6[_i];
+            switch (arg.toLowerCase()) {
+                case "-v":
+                case "--verbose":
+                    verbose = true;
+                    continue;
+                case "-d":
+                case "--dry":
+                    dry = true;
+                    continue;
+                case "-f":
+                case "--force":
+                    force = true;
+                    continue;
+                case "--clean":
+                    clean = true;
+                    continue;
+                case "--watch":
+                case "-w":
+                    watch = true;
+                    continue;
+                case "--?":
+                case "-?":
+                case "--help":
+                    ts.printHelp(buildOpts, "--build ");
+                    return ts.ExitStatus.Success;
+            }
+            // Not a flag, parse as filename
+            addProject(arg);
+        }
+        // Nonsensical combinations
+        if (clean && force) {
+            buildHost.error(ts.Diagnostics.Options_0_and_1_cannot_be_combined, "clean", "force");
+            return ts.ExitStatus.DiagnosticsPresent_OutputsSkipped;
+        }
+        if (clean && verbose) {
+            buildHost.error(ts.Diagnostics.Options_0_and_1_cannot_be_combined, "clean", "verbose");
+            return ts.ExitStatus.DiagnosticsPresent_OutputsSkipped;
+        }
+        if (clean && watch) {
+            buildHost.error(ts.Diagnostics.Options_0_and_1_cannot_be_combined, "clean", "watch");
+            return ts.ExitStatus.DiagnosticsPresent_OutputsSkipped;
+        }
+        if (watch && dry) {
+            buildHost.error(ts.Diagnostics.Options_0_and_1_cannot_be_combined, "watch", "dry");
+            return ts.ExitStatus.DiagnosticsPresent_OutputsSkipped;
+        }
+        if (projects.length === 0) {
+            // tsc -b invoked with no extra arguments; act as if invoked with "tsc -b ."
+            addProject(".");
+        }
+        var builder = createSolutionBuilder(compilerHost, buildHost, projects, { dry: dry, force: force, verbose: verbose }, system);
+        if (clean) {
+            return builder.cleanAllProjects();
+        }
+        if (watch) {
+            builder.startWatching();
+            return undefined;
+        }
+        return builder.buildAllProjects();
+        function addProject(projectSpecification) {
+            var fileName = ts.resolvePath(compilerHost.getCurrentDirectory(), projectSpecification);
+            var refPath = ts.resolveProjectReferencePath(compilerHost, { path: fileName });
+            if (!refPath) {
+                return buildHost.error(ts.Diagnostics.File_0_does_not_exist, projectSpecification);
+            }
+            if (!compilerHost.fileExists(refPath)) {
+                return buildHost.error(ts.Diagnostics.File_0_does_not_exist, fileName);
+            }
+            projects.push(refPath);
+        }
+    }
+    ts.performBuild = performBuild;
+    /**
+     * A SolutionBuilder has an immutable set of rootNames that are the "entry point" projects, but
+     * can dynamically add/remove other projects based on changes on the rootNames' references
+     */
+    function createSolutionBuilder(compilerHost, buildHost, rootNames, defaultOptions, system) {
+        if (!compilerHost.getModifiedTime || !compilerHost.setModifiedTime) {
+            throw new Error("Host must support timestamp APIs");
+        }
+        var configFileCache = createConfigFileCache(compilerHost);
+        var context = createBuildContext(defaultOptions);
+        var existingWatchersForWildcards = ts.createMap();
+        return {
+            buildAllProjects: buildAllProjects,
+            getUpToDateStatus: getUpToDateStatus,
+            getUpToDateStatusOfFile: getUpToDateStatusOfFile,
+            cleanAllProjects: cleanAllProjects,
+            resetBuildContext: resetBuildContext,
+            getBuildGraph: getBuildGraph,
+            invalidateProject: invalidateProject,
+            buildInvalidatedProjects: buildInvalidatedProjects,
+            buildDependentInvalidatedProjects: buildDependentInvalidatedProjects,
+            resolveProjectName: resolveProjectName,
+            startWatching: startWatching
+        };
+        function startWatching() {
+            if (!system)
+                throw new Error("System host must be provided if using --watch");
+            if (!system.watchFile || !system.watchDirectory || !system.setTimeout)
+                throw new Error("System host must support watchFile / watchDirectory / setTimeout if using --watch");
+            var graph = getGlobalDependencyGraph();
+            if (!graph.buildQueue) {
+                // Everything is broken - we don't even know what to watch. Give up.
+                return;
+            }
+            var _loop_12 = function (resolved) {
+                var cfg = configFileCache.parseConfigFile(resolved);
+                if (cfg) {
+                    // Watch this file
+                    system.watchFile(resolved, function () {
+                        configFileCache.removeKey(resolved);
+                        invalidateProjectAndScheduleBuilds(resolved);
+                    });
+                    // Update watchers for wildcard directories
+                    if (cfg.configFileSpecs) {
+                        ts.updateWatchingWildcardDirectories(existingWatchersForWildcards, ts.createMapFromTemplate(cfg.configFileSpecs.wildcardDirectories), function (dir, flags) {
+                            return system.watchDirectory(dir, function () {
+                                invalidateProjectAndScheduleBuilds(resolved);
+                            }, !!(flags & 1 /* Recursive */));
+                        });
+                    }
+                    // Watch input files
+                    for (var _i = 0, _a = cfg.fileNames; _i < _a.length; _i++) {
+                        var input = _a[_i];
+                        system.watchFile(input, function () {
+                            invalidateProjectAndScheduleBuilds(resolved);
+                        });
+                    }
+                }
+            };
+            for (var _i = 0, _a = graph.buildQueue; _i < _a.length; _i++) {
+                var resolved = _a[_i];
+                _loop_12(resolved);
+            }
+            function invalidateProjectAndScheduleBuilds(resolved) {
+                invalidateProject(resolved);
+                system.setTimeout(buildInvalidatedProjects, 100);
+                system.setTimeout(buildDependentInvalidatedProjects, 3000);
+            }
+        }
+        function resetBuildContext(opts) {
+            if (opts === void 0) { opts = defaultOptions; }
+            context = createBuildContext(opts);
+        }
+        function getUpToDateStatusOfFile(configFileName) {
+            return getUpToDateStatus(configFileCache.parseConfigFile(configFileName));
+        }
+        function getBuildGraph(configFileNames) {
+            var resolvedNames = resolveProjectNames(configFileNames);
+            if (resolvedNames === undefined)
+                return undefined;
+            return createDependencyGraph(resolvedNames);
+        }
+        function getGlobalDependencyGraph() {
+            return getBuildGraph(rootNames);
+        }
+        function getUpToDateStatus(project) {
+            if (project === undefined) {
+                return { type: UpToDateStatusType.Unbuildable, reason: "File deleted mid-build" };
+            }
+            var prior = context.projectStatus.getValueOrUndefined(project.options.configFilePath);
+            if (prior !== undefined) {
+                return prior;
+            }
+            var actual = getUpToDateStatusWorker(project);
+            context.projectStatus.setValue(project.options.configFilePath, actual);
+            return actual;
+        }
+        function invalidateProject(configFileName) {
+            var resolved = resolveProjectName(configFileName);
+            if (resolved === undefined) {
+                // If this was a rootName, we need to track it as missing.
+                // Otherwise we can just ignore it and have it possibly surface as an error in any downstream projects,
+                // if they exist
+                // TODO: do those things
+                return;
+            }
+            configFileCache.removeKey(resolved);
+            context.invalidatedProjects.setValue(resolved, true);
+            context.projectStatus.removeKey(resolved);
+            var graph = getGlobalDependencyGraph();
+            if (graph) {
+                queueBuildForDownstreamReferences(resolved);
+            }
+            // Mark all downstream projects of this one needing to be built "later"
+            function queueBuildForDownstreamReferences(root) {
+                debugger;
+                var deps = graph.dependencyMap.getReferencesTo(root);
+                for (var _i = 0, deps_1 = deps; _i < deps_1.length; _i++) {
+                    var ref = deps_1[_i];
+                    // Can skip circular references
+                    if (!context.queuedProjects.hasKey(ref)) {
+                        context.queuedProjects.setValue(ref, true);
+                        queueBuildForDownstreamReferences(ref);
+                    }
+                }
+            }
+        }
+        function buildInvalidatedProjects() {
+            buildSomeProjects(function (p) { return context.invalidatedProjects.hasKey(p); });
+        }
+        function buildDependentInvalidatedProjects() {
+            buildSomeProjects(function (p) { return context.queuedProjects.hasKey(p); });
+        }
+        function buildSomeProjects(predicate) {
+            var resolvedNames = resolveProjectNames(rootNames);
+            if (resolvedNames === undefined)
+                return;
+            var graph = createDependencyGraph(resolvedNames);
+            for (var _i = 0, _a = graph.buildQueue; _i < _a.length; _i++) {
+                var next = _a[_i];
+                if (!predicate(next))
+                    continue;
+                var resolved = resolveProjectName(next);
+                if (!resolved)
+                    continue; // ??
+                var proj = configFileCache.parseConfigFile(resolved);
+                if (!proj)
+                    continue; // ?
+                var status = getUpToDateStatus(proj);
+                verboseReportProjectStatus(next, status);
+                if (status.type === UpToDateStatusType.UpstreamBlocked) {
+                    if (context.options.verbose)
+                        buildHost.verbose(ts.Diagnostics.Skipping_build_of_project_0_because_its_dependency_1_has_errors, resolved, status.upstreamProjectName);
+                    continue;
+                }
+                buildSingleProject(next);
+            }
+        }
+        function getAllProjectOutputs(project) {
+            if (project.options.outFile) {
+                return getOutFileOutputs(project);
+            }
+            else {
+                var outputs = [];
+                for (var _i = 0, _a = project.fileNames; _i < _a.length; _i++) {
+                    var inputFile = _a[_i];
+                    outputs.push.apply(outputs, getOutputFileNames(inputFile, project));
+                }
+                return outputs;
+            }
+        }
+        function getUpToDateStatusWorker(project) {
+            var newestInputFileName = undefined;
+            var newestInputFileTime = minimumDate;
+            // Get timestamps of input files
+            for (var _i = 0, _a = project.fileNames; _i < _a.length; _i++) {
+                var inputFile = _a[_i];
+                if (!compilerHost.fileExists(inputFile)) {
+                    return {
+                        type: UpToDateStatusType.Unbuildable,
+                        reason: inputFile + " does not exist"
+                    };
+                }
+                var inputTime = compilerHost.getModifiedTime(inputFile);
+                if (inputTime > newestInputFileTime) {
+                    newestInputFileName = inputFile;
+                    newestInputFileTime = inputTime;
+                }
+            }
+            // Collect the expected outputs of this project
+            var outputs = getAllProjectOutputs(project);
+            if (outputs.length === 0) {
+                return {
+                    type: UpToDateStatusType.ContainerOnly
+                };
+            }
+            // Now see if all outputs are newer than the newest input
+            var oldestOutputFileName = "(none)";
+            var oldestOutputFileTime = maximumDate;
+            var newestOutputFileName = "(none)";
+            var newestOutputFileTime = minimumDate;
+            var missingOutputFileName;
+            var newestDeclarationFileContentChangedTime = minimumDate;
+            var isOutOfDateWithInputs = false;
+            for (var _b = 0, outputs_1 = outputs; _b < outputs_1.length; _b++) {
+                var output = outputs_1[_b];
+                // Output is missing; can stop checking
+                // Don't immediately return because we can still be upstream-blocked, which is a higher-priority status
+                if (!compilerHost.fileExists(output)) {
+                    missingOutputFileName = output;
+                    break;
+                }
+                var outputTime = compilerHost.getModifiedTime(output);
+                if (outputTime < oldestOutputFileTime) {
+                    oldestOutputFileTime = outputTime;
+                    oldestOutputFileName = output;
+                }
+                // If an output is older than the newest input, we can stop checking
+                // Don't immediately return because we can still be upstream-blocked, which is a higher-priority status
+                if (outputTime < newestInputFileTime) {
+                    isOutOfDateWithInputs = true;
+                    break;
+                }
+                if (outputTime > newestOutputFileTime) {
+                    newestOutputFileTime = outputTime;
+                    newestOutputFileName = output;
+                }
+                // Keep track of when the most recent time a .d.ts file was changed.
+                // In addition to file timestamps, we also keep track of when a .d.ts file
+                // had its file touched but not had its contents changed - this allows us
+                // to skip a downstream typecheck
+                if (isDeclarationFile(output)) {
+                    var unchangedTime = context.unchangedOutputs.getValueOrUndefined(output);
+                    if (unchangedTime !== undefined) {
+                        newestDeclarationFileContentChangedTime = newer(unchangedTime, newestDeclarationFileContentChangedTime);
+                    }
+                    else {
+                        newestDeclarationFileContentChangedTime = newer(newestDeclarationFileContentChangedTime, compilerHost.getModifiedTime(output));
+                    }
+                }
+            }
+            var pseudoUpToDate = false;
+            var usesPrepend = false;
+            if (project.projectReferences) {
+                for (var _c = 0, _d = project.projectReferences; _c < _d.length; _c++) {
+                    var ref = _d[_c];
+                    usesPrepend = usesPrepend || !!(ref.prepend);
+                    var resolvedRef = ts.resolveProjectReferencePath(compilerHost, ref);
+                    var refStatus = getUpToDateStatus(configFileCache.parseConfigFile(resolvedRef));
+                    // An upstream project is blocked
+                    if (refStatus.type === UpToDateStatusType.Unbuildable) {
+                        return {
+                            type: UpToDateStatusType.UpstreamBlocked,
+                            upstreamProjectName: ref.path
+                        };
+                    }
+                    // If the upstream project is out of date, then so are we (someone shouldn't have asked, though?)
+                    if (refStatus.type !== UpToDateStatusType.UpToDate) {
+                        return {
+                            type: UpToDateStatusType.UpstreamOutOfDate,
+                            upstreamProjectName: ref.path
+                        };
+                    }
+                    // If the upstream project's newest file is older than our oldest output, we
+                    // can't be out of date because of it
+                    if (refStatus.newestInputFileTime <= oldestOutputFileTime) {
+                        continue;
+                    }
+                    // If the upstream project has only change .d.ts files, and we've built
+                    // *after* those files, then we're "psuedo up to date" and eligible for a fast rebuild
+                    if (refStatus.newestDeclarationFileContentChangedTime <= oldestOutputFileTime) {
+                        pseudoUpToDate = true;
+                        continue;
+                    }
+                    // We have an output older than an upstream output - we are out of date
+                    ts.Debug.assert(oldestOutputFileName !== undefined, "Should have an oldest output filename here");
+                    return {
+                        type: UpToDateStatusType.OutOfDateWithUpstream,
+                        outOfDateOutputFileName: oldestOutputFileName,
+                        newerProjectName: ref.path
+                    };
+                }
+            }
+            if (missingOutputFileName !== undefined) {
+                return {
+                    type: UpToDateStatusType.OutputMissing,
+                    missingOutputFileName: missingOutputFileName
+                };
+            }
+            if (isOutOfDateWithInputs) {
+                return {
+                    type: UpToDateStatusType.OutOfDateWithSelf,
+                    outOfDateOutputFileName: oldestOutputFileName,
+                    newerInputFileName: newestInputFileName
+                };
+            }
+            if (usesPrepend) {
+                pseudoUpToDate = false;
+            }
+            // Up to date
+            return {
+                type: pseudoUpToDate ? UpToDateStatusType.UpToDateWithUpstreamTypes : UpToDateStatusType.UpToDate,
+                newestDeclarationFileContentChangedTime: newestDeclarationFileContentChangedTime,
+                newestInputFileTime: newestInputFileTime,
+                newestOutputFileTime: newestOutputFileTime,
+                newestInputFileName: newestInputFileName,
+                newestOutputFileName: newestOutputFileName,
+                oldestOutputFileName: oldestOutputFileName
+            };
+        }
+        function createDependencyGraph(roots) {
+            var temporaryMarks = {};
+            var permanentMarks = {};
+            var circularityReportStack = [];
+            var buildOrder = [];
+            var graph = createDependencyMapper();
+            var hadError = false;
+            for (var _i = 0, roots_1 = roots; _i < roots_1.length; _i++) {
+                var root = roots_1[_i];
+                visit(root);
+            }
+            if (hadError) {
+                return undefined;
+            }
+            return {
+                buildQueue: buildOrder,
+                dependencyMap: graph
+            };
+            function visit(projPath, inCircularContext) {
+                if (inCircularContext === void 0) { inCircularContext = false; }
+                // Already visited
+                if (permanentMarks[projPath])
+                    return;
+                // Circular
+                if (temporaryMarks[projPath]) {
+                    if (!inCircularContext) {
+                        hadError = true;
+                        buildHost.error(ts.Diagnostics.Project_references_may_not_form_a_circular_graph_Cycle_detected_Colon_0, circularityReportStack.join("\r\n"));
+                        return;
+                    }
+                }
+                temporaryMarks[projPath] = true;
+                circularityReportStack.push(projPath);
+                var parsed = configFileCache.parseConfigFile(projPath);
+                if (parsed === undefined) {
+                    hadError = true;
+                    return;
+                }
+                if (parsed.projectReferences) {
+                    for (var _i = 0, _a = parsed.projectReferences; _i < _a.length; _i++) {
+                        var ref = _a[_i];
+                        var resolvedRefPath = resolveProjectName(ref.path);
+                        if (resolvedRefPath === undefined) {
+                            hadError = true;
+                            break;
+                        }
+                        visit(resolvedRefPath, inCircularContext || ref.circular);
+                        graph.addReference(projPath, resolvedRefPath);
+                    }
+                }
+                circularityReportStack.pop();
+                permanentMarks[projPath] = true;
+                buildOrder.push(projPath);
+            }
+        }
+        function buildSingleProject(proj) {
+            if (context.options.dry) {
+                buildHost.message(ts.Diagnostics.A_non_dry_build_would_build_project_0, proj);
+                return BuildResultFlags.Success;
+            }
+            if (context.options.verbose)
+                buildHost.verbose(ts.Diagnostics.Building_project_0, proj);
+            var resultFlags = BuildResultFlags.None;
+            resultFlags |= BuildResultFlags.DeclarationOutputUnchanged;
+            var configFile = configFileCache.parseConfigFile(proj);
+            if (!configFile) {
+                // Failed to read the config file
+                resultFlags |= BuildResultFlags.ConfigFileErrors;
+                context.projectStatus.setValue(proj, { type: UpToDateStatusType.Unbuildable, reason: "Config file errors" });
+                return resultFlags;
+            }
+            if (configFile.fileNames.length === 0) {
+                // Nothing to build - must be a solution file, basically
+                return BuildResultFlags.None;
+            }
+            var programOptions = {
+                projectReferences: configFile.projectReferences,
+                host: compilerHost,
+                rootNames: configFile.fileNames,
+                options: configFile.options
+            };
+            var program = ts.createProgram(programOptions);
+            // Don't emit anything in the presence of syntactic errors or options diagnostics
+            var syntaxDiagnostics = program.getOptionsDiagnostics().concat(program.getSyntacticDiagnostics());
+            if (syntaxDiagnostics.length) {
+                resultFlags |= BuildResultFlags.SyntaxErrors;
+                for (var _i = 0, syntaxDiagnostics_1 = syntaxDiagnostics; _i < syntaxDiagnostics_1.length; _i++) {
+                    var diag = syntaxDiagnostics_1[_i];
+                    buildHost.errorDiagnostic(diag);
+                }
+                context.projectStatus.setValue(proj, { type: UpToDateStatusType.Unbuildable, reason: "Syntactic errors" });
+                return resultFlags;
+            }
+            // Don't emit .d.ts if there are decl file errors
+            if (program.getCompilerOptions().declaration) {
+                var declDiagnostics = program.getDeclarationDiagnostics();
+                if (declDiagnostics.length) {
+                    resultFlags |= BuildResultFlags.DeclarationEmitErrors;
+                    for (var _a = 0, declDiagnostics_1 = declDiagnostics; _a < declDiagnostics_1.length; _a++) {
+                        var diag = declDiagnostics_1[_a];
+                        buildHost.errorDiagnostic(diag);
+                    }
+                    context.projectStatus.setValue(proj, { type: UpToDateStatusType.Unbuildable, reason: "Declaration file errors" });
+                    return resultFlags;
+                }
+            }
+            // Same as above but now for semantic diagnostics
+            var semanticDiagnostics = program.getSemanticDiagnostics();
+            if (semanticDiagnostics.length) {
+                resultFlags |= BuildResultFlags.TypeErrors;
+                for (var _b = 0, semanticDiagnostics_1 = semanticDiagnostics; _b < semanticDiagnostics_1.length; _b++) {
+                    var diag = semanticDiagnostics_1[_b];
+                    buildHost.errorDiagnostic(diag);
+                }
+                context.projectStatus.setValue(proj, { type: UpToDateStatusType.Unbuildable, reason: "Semantic errors" });
+                return resultFlags;
+            }
+            var newestDeclarationFileContentChangedTime = minimumDate;
+            program.emit(/*targetSourceFile*/ undefined, function (fileName, content, writeBom, onError) {
+                var priorChangeTime;
+                if (isDeclarationFile(fileName) && compilerHost.fileExists(fileName)) {
+                    if (compilerHost.readFile(fileName) === content) {
+                        // Check for unchanged .d.ts files
+                        resultFlags &= ~BuildResultFlags.DeclarationOutputUnchanged;
+                        priorChangeTime = compilerHost.getModifiedTime && compilerHost.getModifiedTime(fileName);
+                    }
+                }
+                compilerHost.writeFile(fileName, content, writeBom, onError, ts.emptyArray);
+                if (priorChangeTime !== undefined) {
+                    newestDeclarationFileContentChangedTime = newer(priorChangeTime, newestDeclarationFileContentChangedTime);
+                    context.unchangedOutputs.setValue(fileName, priorChangeTime);
+                }
+            });
+            context.projectStatus.setValue(proj, { type: UpToDateStatusType.UpToDate, newestDeclarationFileContentChangedTime: newestDeclarationFileContentChangedTime });
+            return resultFlags;
+        }
+        function updateOutputTimestamps(proj) {
+            if (context.options.dry) {
+                return buildHost.message(ts.Diagnostics.A_non_dry_build_would_build_project_0, proj.options.configFilePath);
+            }
+            if (context.options.verbose)
+                buildHost.verbose(ts.Diagnostics.Updating_output_timestamps_of_project_0, proj.options.configFilePath);
+            var now = new Date();
+            var outputs = getAllProjectOutputs(proj);
+            var priorNewestUpdateTime = minimumDate;
+            for (var _i = 0, outputs_2 = outputs; _i < outputs_2.length; _i++) {
+                var file = outputs_2[_i];
+                if (isDeclarationFile(file)) {
+                    priorNewestUpdateTime = newer(priorNewestUpdateTime, compilerHost.getModifiedTime(file));
+                }
+                compilerHost.setModifiedTime(file, now);
+            }
+            context.projectStatus.setValue(proj.options.configFilePath, { type: UpToDateStatusType.UpToDate, newestDeclarationFileContentChangedTime: priorNewestUpdateTime });
+        }
+        function getFilesToClean(configFileNames) {
+            var resolvedNames = resolveProjectNames(configFileNames);
+            if (resolvedNames === undefined)
+                return undefined;
+            // Get the same graph for cleaning we'd use for building
+            var graph = createDependencyGraph(resolvedNames);
+            if (graph === undefined)
+                return undefined;
+            var filesToDelete = [];
+            for (var _i = 0, _a = graph.buildQueue; _i < _a.length; _i++) {
+                var proj = _a[_i];
+                var parsed = configFileCache.parseConfigFile(proj);
+                if (parsed === undefined) {
+                    // File has gone missing; fine to ignore here
+                    continue;
+                }
+                var outputs = getAllProjectOutputs(parsed);
+                for (var _b = 0, outputs_3 = outputs; _b < outputs_3.length; _b++) {
+                    var output = outputs_3[_b];
+                    if (compilerHost.fileExists(output)) {
+                        filesToDelete.push(output);
+                    }
+                }
+            }
+            return filesToDelete;
+        }
+        function getAllProjectsInScope() {
+            var resolvedNames = resolveProjectNames(rootNames);
+            if (resolvedNames === undefined)
+                return undefined;
+            var graph = createDependencyGraph(resolvedNames);
+            if (graph === undefined)
+                return undefined;
+            return graph.buildQueue;
+        }
+        function cleanAllProjects() {
+            var resolvedNames = getAllProjectsInScope();
+            if (resolvedNames === undefined) {
+                buildHost.message(ts.Diagnostics.Skipping_clean_because_not_all_projects_could_be_located);
+                return ts.ExitStatus.DiagnosticsPresent_OutputsSkipped;
+            }
+            var filesToDelete = getFilesToClean(resolvedNames);
+            if (filesToDelete === undefined) {
+                buildHost.message(ts.Diagnostics.Skipping_clean_because_not_all_projects_could_be_located);
+                return ts.ExitStatus.DiagnosticsPresent_OutputsSkipped;
+            }
+            if (context.options.dry) {
+                buildHost.message(ts.Diagnostics.A_non_dry_build_would_delete_the_following_files_Colon_0, filesToDelete.map(function (f) { return "\r\n * " + f; }).join(""));
+                return ts.ExitStatus.Success;
+            }
+            // Do this check later to allow --clean --dry to function even if the host can't delete files
+            if (!compilerHost.deleteFile) {
+                throw new Error("Host does not support deleting files");
+            }
+            for (var _i = 0, filesToDelete_1 = filesToDelete; _i < filesToDelete_1.length; _i++) {
+                var output = filesToDelete_1[_i];
+                compilerHost.deleteFile(output);
+            }
+            return ts.ExitStatus.Success;
+        }
+        function resolveProjectName(name) {
+            var fullPath = ts.resolvePath(compilerHost.getCurrentDirectory(), name);
+            if (compilerHost.fileExists(fullPath)) {
+                return fullPath;
+            }
+            var fullPathWithTsconfig = ts.combinePaths(fullPath, "tsconfig.json");
+            if (compilerHost.fileExists(fullPathWithTsconfig)) {
+                return fullPathWithTsconfig;
+            }
+            buildHost.error(ts.Diagnostics.File_0_not_found, relName(fullPath));
+            return undefined;
+        }
+        function resolveProjectNames(configFileNames) {
+            var resolvedNames = [];
+            for (var _i = 0, configFileNames_1 = configFileNames; _i < configFileNames_1.length; _i++) {
+                var name = configFileNames_1[_i];
+                var resolved = resolveProjectName(name);
+                if (resolved === undefined) {
+                    return undefined;
+                }
+                resolvedNames.push(resolved);
+            }
+            return resolvedNames;
+        }
+        function buildAllProjects() {
+            var graph = getGlobalDependencyGraph();
+            if (graph === undefined)
+                return ts.ExitStatus.DiagnosticsPresent_OutputsSkipped;
+            var queue = graph.buildQueue;
+            reportBuildQueue(graph);
+            var anyFailed = false;
+            for (var _i = 0, queue_1 = queue; _i < queue_1.length; _i++) {
+                var next = queue_1[_i];
+                var proj = configFileCache.parseConfigFile(next);
+                if (proj === undefined) {
+                    anyFailed = true;
+                    break;
+                }
+                var status = getUpToDateStatus(proj);
+                verboseReportProjectStatus(next, status);
+                var projName = proj.options.configFilePath;
+                if (status.type === UpToDateStatusType.UpToDate && !context.options.force) {
+                    // Up to date, skip
+                    if (defaultOptions.dry) {
+                        // In a dry build, inform the user of this fact
+                        buildHost.message(ts.Diagnostics.Project_0_is_up_to_date, projName);
+                    }
+                    continue;
+                }
+                if (status.type === UpToDateStatusType.UpToDateWithUpstreamTypes && !context.options.force) {
+                    // Fake build
+                    updateOutputTimestamps(proj);
+                    continue;
+                }
+                if (status.type === UpToDateStatusType.UpstreamBlocked) {
+                    if (context.options.verbose)
+                        buildHost.verbose(ts.Diagnostics.Skipping_build_of_project_0_because_its_dependency_1_has_errors, projName, status.upstreamProjectName);
+                    continue;
+                }
+                if (status.type === UpToDateStatusType.ContainerOnly) {
+                    // Do nothing
+                    continue;
+                }
+                var buildResult = buildSingleProject(next);
+                anyFailed = anyFailed || !!(buildResult & BuildResultFlags.AnyErrors);
+            }
+            return anyFailed ? ts.ExitStatus.DiagnosticsPresent_OutputsSkipped : ts.ExitStatus.Success;
+        }
+        /**
+         * Report the build ordering inferred from the current project graph if we're in verbose mode
+         */
+        function reportBuildQueue(graph) {
+            if (!context.options.verbose)
+                return;
+            var names = [];
+            for (var _i = 0, _a = graph.buildQueue; _i < _a.length; _i++) {
+                var name = _a[_i];
+                names.push(name);
+            }
+            if (context.options.verbose)
+                buildHost.verbose(ts.Diagnostics.Projects_in_this_build_Colon_0, names.map(function (s) { return "\r\n    * " + relName(s); }).join(""));
+        }
+        function relName(path) {
+            return ts.convertToRelativePath(path, compilerHost.getCurrentDirectory(), function (f) { return compilerHost.getCanonicalFileName(f); });
+        }
+        /**
+         * Report the up-to-date status of a project if we're in verbose mode
+         */
+        function verboseReportProjectStatus(configFileName, status) {
+            if (!context.options.verbose)
+                return;
+            switch (status.type) {
+                case UpToDateStatusType.OutOfDateWithSelf:
+                    return buildHost.verbose(ts.Diagnostics.Project_0_is_out_of_date_because_oldest_output_1_is_older_than_newest_input_2, relName(configFileName), relName(status.outOfDateOutputFileName), relName(status.newerInputFileName));
+                case UpToDateStatusType.OutOfDateWithUpstream:
+                    return buildHost.verbose(ts.Diagnostics.Project_0_is_out_of_date_because_oldest_output_1_is_older_than_newest_input_2, relName(configFileName), relName(status.outOfDateOutputFileName), relName(status.newerProjectName));
+                case UpToDateStatusType.OutputMissing:
+                    return buildHost.verbose(ts.Diagnostics.Project_0_is_out_of_date_because_output_file_1_does_not_exist, relName(configFileName), relName(status.missingOutputFileName));
+                case UpToDateStatusType.UpToDate:
+                    if (status.newestInputFileTime !== undefined) {
+                        return buildHost.verbose(ts.Diagnostics.Project_0_is_up_to_date_because_newest_input_1_is_older_than_oldest_output_2, relName(configFileName), relName(status.newestInputFileName), relName(status.oldestOutputFileName));
+                    }
+                    // Don't report anything for "up to date because it was already built" -- too verbose
+                    break;
+                case UpToDateStatusType.UpToDateWithUpstreamTypes:
+                    return buildHost.verbose(ts.Diagnostics.Project_0_is_up_to_date_with_d_ts_files_from_its_dependencies, relName(configFileName));
+                case UpToDateStatusType.UpstreamOutOfDate:
+                    return buildHost.verbose(ts.Diagnostics.Project_0_is_out_of_date_because_its_dependency_1_is_out_of_date, relName(configFileName), relName(status.upstreamProjectName));
+                case UpToDateStatusType.UpstreamBlocked:
+                    return buildHost.verbose(ts.Diagnostics.Project_0_can_t_be_built_because_its_dependency_1_has_errors, relName(configFileName), relName(status.upstreamProjectName));
+                case UpToDateStatusType.Unbuildable:
+                    return buildHost.verbose(ts.Diagnostics.Failed_to_parse_file_0_Colon_1, relName(configFileName), status.reason);
+                case UpToDateStatusType.ContainerOnly:
+                    // Don't report status on "solution" projects
+                    break;
+                default:
+                    ts.assertTypeIsNever(status);
+            }
+        }
+    }
+    ts.createSolutionBuilder = createSolutionBuilder;
+})(ts || (ts = {}));
+//# sourceMappingURL=compiler.js.map
 "use strict";
+/* @internal */
 var ts;
 (function (ts) {
     var server;
diff --git a/lib/watchGuard.js b/lib/watchGuard.js
index 10b0c1e11ba99..c89356b0dc3ad 100644
--- a/lib/watchGuard.js
+++ b/lib/watchGuard.js
@@ -1,3 +1,19 @@
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved. 
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0  
+ 
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
+MERCHANTABLITY OR NON-INFRINGEMENT. 
+ 
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+
+
 "use strict";
 if (process.argv.length < 3) {
     process.exit(1);
diff --git a/package.json b/package.json
index 95dc4859082a9..1845742dc1293 100644
--- a/package.json
+++ b/package.json
@@ -45,7 +45,7 @@
         "@types/minimatch": "latest",
         "@types/minimist": "latest",
         "@types/mkdirp": "latest",
-        "@types/mocha": "latest",
+        "@types/mocha": "^5.2.2",
         "@types/node": "8.5.5",
         "@types/q": "latest",
         "@types/run-sequence": "latest",
@@ -59,6 +59,7 @@
         "chalk": "latest",
         "convert-source-map": "latest",
         "del": "latest",
+        "fs-extra": "^6.0.1",
         "gulp": "3.X",
         "gulp-clone": "latest",
         "gulp-concat": "latest",
diff --git a/scripts/buildProtocol.ts b/scripts/buildProtocol.ts
index 7d32473f7235a..006608323cf1f 100644
--- a/scripts/buildProtocol.ts
+++ b/scripts/buildProtocol.ts
@@ -55,7 +55,7 @@ class DeclarationsWalker {
             if (declarations) {
                 for (const decl of declarations) {
                     const sourceFile = decl.getSourceFile();
-                    if (sourceFile === this.protocolFile || /lib\.(.*)\.d.ts/.test(path.basename(sourceFile.fileName))) {
+                    if (sourceFile === this.protocolFile || /lib(\..+)?\.d.ts/.test(path.basename(sourceFile.fileName))) {
                         return;
                     }
                     if (decl.kind === ts.SyntaxKind.EnumDeclaration && !isStringEnum(decl as ts.EnumDeclaration)) {
@@ -121,14 +121,14 @@ class DeclarationsWalker {
 }
 
 function writeProtocolFile(outputFile: string, protocolTs: string, typeScriptServicesDts: string) {
-    const options = { target: ts.ScriptTarget.ES5, declaration: true, noResolve: true, types: <string[]>[], stripInternal: true };
+    const options = { target: ts.ScriptTarget.ES5, declaration: true, noResolve: false, types: <string[]>[], stripInternal: true };
 
     /**
      * 1st pass - generate a program from protocol.ts and typescriptservices.d.ts and emit core version of protocol.d.ts with all internal members stripped
      * @return text of protocol.d.t.s
      */
     function getInitialDtsFileForProtocol() {
-        const program = ts.createProgram([protocolTs, typeScriptServicesDts], options);
+        const program = ts.createProgram([protocolTs, typeScriptServicesDts, path.join(typeScriptServicesDts, "../lib.es5.d.ts")], options);
 
         let protocolDts: string | undefined;
         const emitResult = program.emit(program.getSourceFile(protocolTs), (file, content) => {
diff --git a/scripts/processDiagnosticMessages.ts b/scripts/processDiagnosticMessages.ts
index 04893eb38e35c..f296a62de78ed 100644
--- a/scripts/processDiagnosticMessages.ts
+++ b/scripts/processDiagnosticMessages.ts
@@ -60,7 +60,7 @@ function checkForUniqueCodes(diagnosticTable: InputDiagnosticMessageTable) {
 function buildInfoFileOutput(messageTable: InputDiagnosticMessageTable, inputFilePathRel: string, thisFilePathRel: string): string {
     let result =
         "// <auto-generated />\r\n" +
-        "// generated from '" + inputFilePathRel + "' by '" + thisFilePathRel + "'\r\n" +
+        "// generated from '" + inputFilePathRel + "' by '" + thisFilePathRel.replace(/\\/g, '/') + "'\r\n" +
         "/* @internal */\r\n" +
         "namespace ts {\r\n" +
         "    function diag(code: number, category: DiagnosticCategory, key: string, message: string, reportsUnnecessary?: {}): DiagnosticMessage {\r\n" +
@@ -119,4 +119,4 @@ function convertPropertyName(origName: string): string {
     return result;
 }
 
-main();
\ No newline at end of file
+main();
diff --git a/scripts/produceLKG.ts b/scripts/produceLKG.ts
new file mode 100644
index 0000000000000..800234e688a16
--- /dev/null
+++ b/scripts/produceLKG.ts
@@ -0,0 +1,100 @@
+/// <reference types="node" />
+
+import childProcess = require('child_process');
+import fs = require('fs-extra');
+import path = require('path');
+import removeInternal = require('remove-internal');
+import glob = require('glob');
+
+const root = path.join(__dirname, "..");
+const source = path.join(root, "built/local");
+const dest = path.join(root, "lib");
+const copyright = fs.readFileSync(path.join(__dirname, "../CopyrightNotice.txt"), "utf-8");
+
+async function produceLKG() {
+    console.log(`Building LKG from ${source} to ${dest}`);
+    await copyLibFiles();
+    await copyLocalizedDiagnostics();
+    await buildProtocol();
+    await copyScriptOutputs();
+    await buildTsc();
+    await copyDeclarationOutputs();
+    await writeGitAttributes();
+}
+
+async function copyLibFiles() {
+    await copyFilesWithGlob("lib?(.*).d.ts");
+}
+
+async function copyLocalizedDiagnostics() {
+    const dir = await fs.readdir(source);
+    for (const d of dir) {
+        const fileName = path.join(source, d);
+        if (fs.statSync(fileName).isDirectory()) {
+            if (d === 'tslint') continue;
+            await fs.copy(fileName, path.join(dest, d));
+        }
+    }
+}
+
+async function buildProtocol() {
+    const protocolScript = path.join(__dirname, "buildProtocol.js");
+    if (!fs.existsSync(protocolScript)) {
+        throw new Error(`Expected protocol script ${protocolScript} to exist`);
+    }
+
+    const protocolInput = path.join(__dirname, "../src/server/protocol.ts");
+    const protocolServices = path.join(source, "typescriptServices.d.ts");
+    const protocolOutput = path.join(dest, "protocol.d.ts");
+
+    console.log(`Building ${protocolOutput}...`);
+    await exec(protocolScript, [protocolInput, protocolServices, protocolOutput]);
+}
+
+async function copyScriptOutputs() {
+    await copyWithCopyright("tsserver.js");
+    await copyWithCopyright("tsc.js");
+    await copyWithCopyright("watchGuard.js");
+    await copyWithCopyright("cancellationToken.js");
+    await copyWithCopyright("typingsInstaller.js");
+}
+
+async function buildTsc() {
+    await exec(path.join(source, "tsc.js"), [`-b -f ${path.join(root, "src/tsc/tsconfig.release.json")}`]);
+}
+
+async function copyDeclarationOutputs() {
+    await copyWithCopyright("typescript.d.ts");
+    await copyWithCopyright("typescriptServices.d.ts");
+    await copyWithCopyright("tsserverlibrary.d.ts");
+}
+
+async function writeGitAttributes() {
+    await fs.writeFile(path.join(dest, ".gitattributes"), `* text eol=lf`, "utf-8");
+}
+
+async function copyWithCopyright(fileName: string) {
+    const content = await fs.readFile(path.join(source, fileName), "utf-8");
+    await fs.writeFile(path.join(dest, fileName), copyright + "\r\n" + content);
+}
+
+async function copyFromBuiltLocal(fileName: string) {
+    await fs.copy(path.join(source, fileName), path.join(dest, fileName));
+}
+
+async function copyFilesWithGlob(pattern: string) {
+    const files = glob.sync(path.join(source, pattern)).map(f => path.basename(f));
+    for (const f of files) {
+        await copyFromBuiltLocal(f);
+    }
+    console.log(`Copied ${files.length} files matching pattern ${pattern}`);
+}
+
+async function exec(path: string, args: string[] = []) {
+    const cmdLine = ["node", path, ...args].join(" ");
+    console.log(cmdLine);
+    childProcess.execSync(cmdLine);
+}
+
+process.on("unhandledRejection", err => { throw err; });
+produceLKG().then(() => console.log("Done"), err => { throw err; });
diff --git a/scripts/tsconfig.json b/scripts/tsconfig.json
new file mode 100644
index 0000000000000..454ef49a01f33
--- /dev/null
+++ b/scripts/tsconfig.json
@@ -0,0 +1,20 @@
+{
+    "compilerOptions": {
+        "removeComments": false,
+        "target": "es6",
+        "module": "commonjs",
+        "declaration": false,
+        "lib": [
+            "es6",
+            "scripthost"
+        ],
+        "types": ["node"]
+    },
+    "files": [
+        "produceLKG.ts",
+        "buildProtocol.ts",
+        "processDiagnosticMessages.ts",
+        "generateLocalizedDiagnosticMessages.ts",
+        "configurePrerelease.ts"
+    ]
+}
\ No newline at end of file
diff --git a/src/compiler/binder.ts b/src/compiler/binder.ts
index 96805be23bf0c..6815b2c352d7f 100644
--- a/src/compiler/binder.ts
+++ b/src/compiler/binder.ts
@@ -2305,18 +2305,22 @@ namespace ts {
         }
 
         function setCommonJsModuleIndicator(node: Node) {
+            if (file.externalModuleIndicator) {
+                return false;
+            }
             if (!file.commonJsModuleIndicator) {
                 file.commonJsModuleIndicator = node;
-                if (!file.externalModuleIndicator) {
-                    bindSourceFileAsExternalModule();
-                }
+                bindSourceFileAsExternalModule();
             }
+            return true;
         }
 
         function bindExportsPropertyAssignment(node: BinaryExpression) {
             // When we create a property via 'exports.foo = bar', the 'exports.foo' property access
             // expression is the declaration
-            setCommonJsModuleIndicator(node);
+            if (!setCommonJsModuleIndicator(node)) {
+                return;
+            }
             const lhs = node.left as PropertyAccessEntityNameExpression;
             const symbol = forEachIdentifierInEntityName(lhs.expression, /*parent*/ undefined, (id, symbol) => {
                 if (symbol) {
@@ -2337,15 +2341,15 @@ namespace ts {
             // is still pointing to 'module.exports'.
             // We do not want to consider this as 'export=' since a module can have only one of these.
             // Similarly we do not want to treat 'module.exports = exports' as an 'export='.
+            if (!setCommonJsModuleIndicator(node)) {
+                return;
+            }
             const assignedExpression = getRightMostAssignedExpression(node.right);
             if (isEmptyObjectLiteral(assignedExpression) || container === file && isExportsOrModuleExportsOrAlias(file, assignedExpression)) {
-                // Mark it as a module in case there are no other exports in the file
-                setCommonJsModuleIndicator(node);
                 return;
             }
 
             // 'module.exports = expr' assignment
-            setCommonJsModuleIndicator(node);
             const flags = exportAssignmentIsAlias(node)
                 ? SymbolFlags.Alias // An export= with an EntityNameExpression or a ClassExpression exports all meanings of that identifier or class
                 : SymbolFlags.Property | SymbolFlags.ExportValue | SymbolFlags.ValueModule;
@@ -2514,11 +2518,12 @@ namespace ts {
                 return true;
             }
             const node = symbol.valueDeclaration;
-            const init = !node ? undefined :
+            let init = !node ? undefined :
                 isVariableDeclaration(node) ? node.initializer :
                 isBinaryExpression(node) ? node.right :
                 isPropertyAccessExpression(node) && isBinaryExpression(node.parent) ? node.parent.right :
                 undefined;
+            init = init && getRightMostAssignedExpression(init);
             if (init) {
                 const isPrototypeAssignment = isPrototypeAccess(isVariableDeclaration(node) ? node.name : isBinaryExpression(node) ? node.left : node);
                 return !!getJavascriptInitializer(isBinaryExpression(init) && init.operatorToken.kind === SyntaxKind.BarBarToken ? init.right : init, isPrototypeAssignment);
diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index c011c77f5ecf6..d86b14ad72c76 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -833,11 +833,12 @@ namespace ts {
             return emitResolver;
         }
 
-        function error(location: Node | undefined, message: DiagnosticMessage, arg0?: string | number, arg1?: string | number, arg2?: string | number, arg3?: string | number): void {
+        function error(location: Node | undefined, message: DiagnosticMessage, arg0?: string | number, arg1?: string | number, arg2?: string | number, arg3?: string | number): Diagnostic {
             const diagnostic = location
                 ? createDiagnosticForNode(location, message, arg0, arg1, arg2, arg3)
                 : createCompilerDiagnostic(message, arg0, arg1, arg2, arg3);
             diagnostics.add(diagnostic);
+            return diagnostic;
         }
 
         function addErrorOrSuggestion(isError: boolean, diagnostic: DiagnosticWithLocation) {
@@ -4099,7 +4100,14 @@ namespace ts {
                     }
                     else {
                         const contextFile = getSourceFileOfNode(getOriginalNode(context!.enclosingDeclaration))!;
-                        return `"${file.moduleName || moduleSpecifiers.getModuleSpecifier(compilerOptions, contextFile, contextFile.path, file.path, context!.tracker.moduleResolverHost!)}"`;
+                        return `"${file.moduleName || moduleSpecifiers.getModuleSpecifiers(
+                            symbol,
+                            compilerOptions,
+                            contextFile,
+                            context!.tracker.moduleResolverHost!,
+                            context!.tracker.moduleResolverHost!.getSourceFiles!(),
+                            { importModuleSpecifierPreference: "non-relative" }
+                        )[0]}"`;
                     }
                 }
                 const declaration = symbol.declarations[0];
@@ -4876,7 +4884,10 @@ namespace ts {
         // binding pattern [x, s = ""]. Because the contextual type is a tuple type, the resulting type of [1, "one"] is the
         // tuple type [number, string]. Thus, the type inferred for 'x' is number and the type inferred for 's' is string.
         function getWidenedTypeForVariableLikeDeclaration(declaration: ParameterDeclaration | PropertyDeclaration | PropertySignature | VariableDeclaration | BindingElement, reportErrors?: boolean): Type {
-            let type = getTypeForVariableLikeDeclaration(declaration, /*includeOptionality*/ true);
+            return widenTypeForVariableLikeDeclaration(getTypeForVariableLikeDeclaration(declaration, /*includeOptionality*/ true), declaration, reportErrors);
+        }
+
+        function widenTypeForVariableLikeDeclaration(type: Type | undefined, declaration: any, reportErrors?: boolean) {
             if (type) {
                 if (reportErrors) {
                     reportErrorsFromWidening(declaration, type);
@@ -4939,59 +4950,48 @@ namespace ts {
                 if (declaration.kind === SyntaxKind.ExportAssignment) {
                     return links.type = checkExpression((<ExportAssignment>declaration).expression);
                 }
-                if (isInJavaScriptFile(declaration) && isJSDocPropertyLikeTag(declaration) && declaration.typeExpression) {
-                    return links.type = getTypeFromTypeNode(declaration.typeExpression.type);
-                }
                 // Handle variable, parameter or property
                 if (!pushTypeResolution(symbol, TypeSystemPropertyName.Type)) {
                     return errorType;
                 }
 
-                let type: Type;
-                // Handle certain special assignment kinds, which happen to union across multiple declarations:
-                // * module.exports = expr
-                // * exports.p = expr
-                // * this.p = expr
-                // * className.prototype.method = expr
-                if (declaration.kind === SyntaxKind.BinaryExpression ||
-                    declaration.kind === SyntaxKind.PropertyAccessExpression && declaration.parent.kind === SyntaxKind.BinaryExpression) {
-                    type = getWidenedTypeFromJSSpecialPropertyDeclarations(symbol);
-                }
-                else if (isJSDocPropertyLikeTag(declaration)
-                    || isPropertyAccessExpression(declaration)
-                    || isIdentifier(declaration)
-                    || isClassDeclaration(declaration)
-                    || isFunctionDeclaration(declaration)
-                    || (isMethodDeclaration(declaration) && !isObjectLiteralMethod(declaration))
-                    || isMethodSignature(declaration)) {
-
-                    // Symbol is property of some kind that is merged with something - should use `getTypeOfFuncClassEnumModule` and not `getTypeOfVariableOrParameterOrProperty`
-                    if (symbol.flags & (SymbolFlags.Function | SymbolFlags.Method | SymbolFlags.Class | SymbolFlags.Enum | SymbolFlags.ValueModule)) {
-                        return getTypeOfFuncClassEnumModule(symbol);
-                    }
-                    type = tryGetTypeFromEffectiveTypeNode(declaration) || anyType;
-                }
-                else if (isPropertyAssignment(declaration)) {
-                    type = tryGetTypeFromEffectiveTypeNode(declaration) || checkPropertyAssignment(declaration);
-                }
-                else if (isJsxAttribute(declaration)) {
-                    type = tryGetTypeFromEffectiveTypeNode(declaration) || checkJsxAttribute(declaration);
-                }
-                else if (isShorthandPropertyAssignment(declaration)) {
-                    type = tryGetTypeFromEffectiveTypeNode(declaration) || checkExpressionForMutableLocation(declaration.name, CheckMode.Normal);
-                }
-                else if (isObjectLiteralMethod(declaration)) {
-                    type = tryGetTypeFromEffectiveTypeNode(declaration) || checkObjectLiteralMethod(declaration, CheckMode.Normal);
-                }
-                else if (isParameter(declaration)
-                    || isPropertyDeclaration(declaration)
-                    || isPropertySignature(declaration)
-                    || isVariableDeclaration(declaration)
-                    || isBindingElement(declaration)) {
-                    type = getWidenedTypeForVariableLikeDeclaration(declaration, /*reportErrors*/ true);
-                }
-                else {
-                    return Debug.fail("Unhandled declaration kind! " + Debug.showSyntaxKind(declaration) + " for " + Debug.showSymbol(symbol));
+                let type = getJSSpecialType(symbol, declaration);
+                if (!type) {
+                    if (isJSDocPropertyLikeTag(declaration)
+                        || isPropertyAccessExpression(declaration)
+                        || isIdentifier(declaration)
+                        || isClassDeclaration(declaration)
+                        || isFunctionDeclaration(declaration)
+                        || (isMethodDeclaration(declaration) && !isObjectLiteralMethod(declaration))
+                        || isMethodSignature(declaration)) {
+                        // Symbol is property of some kind that is merged with something - should use `getTypeOfFuncClassEnumModule` and not `getTypeOfVariableOrParameterOrProperty`
+                        if (symbol.flags & (SymbolFlags.Function | SymbolFlags.Method | SymbolFlags.Class | SymbolFlags.Enum | SymbolFlags.ValueModule)) {
+                            return getTypeOfFuncClassEnumModule(symbol);
+                        }
+                        type = tryGetTypeFromEffectiveTypeNode(declaration) || anyType;
+                    }
+                    else if (isPropertyAssignment(declaration)) {
+                        type = tryGetTypeFromEffectiveTypeNode(declaration) || checkPropertyAssignment(declaration);
+                    }
+                    else if (isJsxAttribute(declaration)) {
+                        type = tryGetTypeFromEffectiveTypeNode(declaration) || checkJsxAttribute(declaration);
+                    }
+                    else if (isShorthandPropertyAssignment(declaration)) {
+                        type = tryGetTypeFromEffectiveTypeNode(declaration) || checkExpressionForMutableLocation(declaration.name, CheckMode.Normal);
+                    }
+                    else if (isObjectLiteralMethod(declaration)) {
+                        type = tryGetTypeFromEffectiveTypeNode(declaration) || checkObjectLiteralMethod(declaration, CheckMode.Normal);
+                    }
+                    else if (isParameter(declaration)
+                             || isPropertyDeclaration(declaration)
+                             || isPropertySignature(declaration)
+                             || isVariableDeclaration(declaration)
+                             || isBindingElement(declaration)) {
+                        type = getWidenedTypeForVariableLikeDeclaration(declaration, /*includeOptionality*/ true);
+                    }
+                    else {
+                        return Debug.fail("Unhandled declaration kind! " + Debug.showSyntaxKind(declaration) + " for " + Debug.showSymbol(symbol));
+                    }
                 }
 
                 if (!popTypeResolution()) {
@@ -5002,6 +5002,56 @@ namespace ts {
             return links.type;
         }
 
+        function getJSSpecialType(symbol: Symbol, decl: Declaration): Type | undefined {
+            if (!isInJavaScriptFile(decl)) {
+                return undefined;
+            }
+            else if (isJSDocPropertyLikeTag(decl) && decl.typeExpression) {
+                return getTypeFromTypeNode(decl.typeExpression.type);
+            }
+            // Handle certain special assignment kinds, which happen to union across multiple declarations:
+            // * module.exports = expr
+            // * exports.p = expr
+            // * this.p = expr
+            // * className.prototype.method = expr
+            else if (isBinaryExpression(decl) ||
+                isPropertyAccessExpression(decl) && isBinaryExpression(decl.parent)) {
+                return getJSInitializerType(decl, symbol, getAssignedJavascriptInitializer(isBinaryExpression(decl) ? decl.left : decl)) ||
+                    getWidenedTypeFromJSSpecialPropertyDeclarations(symbol);
+            }
+            else if (isParameter(decl)
+                || isPropertyDeclaration(decl)
+                || isPropertySignature(decl)
+                || isVariableDeclaration(decl)
+                || isBindingElement(decl)) {
+                // Use type from type annotation if one is present
+                const isOptional = isParameter(decl) && isJSDocOptionalParameter(decl) ||
+                    !isBindingElement(decl) && !isVariableDeclaration(decl) && !!decl.questionToken;
+                const declaredType = tryGetTypeFromEffectiveTypeNode(decl);
+                return declaredType && addOptionality(declaredType, isOptional) ||
+                    getJSInitializerType(decl, symbol, getDeclaredJavascriptInitializer(decl)) ||
+                    getWidenedTypeForVariableLikeDeclaration(decl, /*includeOptionality*/ true);
+            }
+        }
+
+        function getJSInitializerType(decl: Node, symbol: Symbol, init: Expression | undefined): Type | undefined {
+            if (init && isInJavaScriptFile(init) && isObjectLiteralExpression(init)) {
+                const exports = createSymbolTable();
+                while (isBinaryExpression(decl) || isPropertyAccessExpression(decl)) {
+                    const s = getSymbolOfNode(decl);
+                    if (s && hasEntries(s.exports)) {
+                        mergeSymbolTable(exports, s.exports);
+                    }
+                    decl = isBinaryExpression(decl) ? decl.parent : decl.parent.parent;
+                }
+                const s = getSymbolOfNode(decl);
+                if (s && hasEntries(s.exports)) {
+                    mergeSymbolTable(exports, s.exports);
+                }
+                return createAnonymousType(symbol, exports, emptyArray, emptyArray, jsObjectLiteralIndexInfo, undefined);
+            }
+        }
+
         function getAnnotatedAccessorType(accessor: AccessorDeclaration | undefined): Type | undefined {
             if (accessor) {
                 if (accessor.kind === SyntaxKind.GetAccessor) {
@@ -10483,18 +10533,21 @@ namespace ts {
                     }
                 }
 
-                diagnostics.add(createDiagnosticForNodeFromMessageChain(errorNode!, errorInfo)); // TODO: GH#18217
-            }
-            // Check if we should issue an extra diagnostic to produce a quickfix for a slightly incorrect import statement
-            if (headMessage && errorNode && !result && source.symbol) {
-                const links = getSymbolLinks(source.symbol);
-                if (links.originatingImport && !isImportCall(links.originatingImport)) {
-                    const helpfulRetry = checkTypeRelatedTo(getTypeOfSymbol(links.target!), target, relation, /*errorNode*/ undefined);
-                    if (helpfulRetry) {
-                        // Likely an incorrect import. Issue a helpful diagnostic to produce a quickfix to change the import
-                        diagnostics.add(createDiagnosticForNode(links.originatingImport, Diagnostics.A_namespace_style_import_cannot_be_called_or_constructed_and_will_cause_a_failure_at_runtime));
+                let relatedInformation: DiagnosticRelatedInformation[] | undefined;
+                // Check if we should issue an extra diagnostic to produce a quickfix for a slightly incorrect import statement
+                if (headMessage && errorNode && !result && source.symbol) {
+                    const links = getSymbolLinks(source.symbol);
+                    if (links.originatingImport && !isImportCall(links.originatingImport)) {
+                        const helpfulRetry = checkTypeRelatedTo(getTypeOfSymbol(links.target!), target, relation, /*errorNode*/ undefined);
+                        if (helpfulRetry) {
+                            // Likely an incorrect import. Issue a helpful diagnostic to produce a quickfix to change the import
+                            const diag = createDiagnosticForNode(links.originatingImport, Diagnostics.Type_originates_at_this_import_A_namespace_style_import_cannot_be_called_or_constructed_and_will_cause_a_failure_at_runtime_Consider_using_a_default_import_or_import_require_here_instead);
+                            relatedInformation = append(relatedInformation, diag); // Cause the error to appear with the error that triggered it
+                        }
                     }
                 }
+
+                diagnostics.add(createDiagnosticForNodeFromMessageChain(errorNode!, errorInfo, relatedInformation)); // TODO: GH#18217
             }
             return result !== Ternary.False;
 
@@ -11366,12 +11419,12 @@ namespace ts {
                     }
                 }
                 if (isTupleType(target)) {
-                    const targetRestType = getRestTypeOfTupleType(<TypeReference>target);
+                    const targetRestType = getRestTypeOfTupleType(target);
                     if (targetRestType) {
                         if (!isTupleType(source)) {
                             return Ternary.False;
                         }
-                        const sourceRestType = getRestTypeOfTupleType(<TypeReference>source);
+                        const sourceRestType = getRestTypeOfTupleType(source);
                         if (sourceRestType && !isRelatedTo(sourceRestType, targetRestType, reportErrors)) {
                             if (reportErrors) {
                                 // !!! Rest element types are incompatible
@@ -11379,8 +11432,8 @@ namespace ts {
                             }
                             return Ternary.False;
                         }
-                        const targetCount = getTypeReferenceArity(<TypeReference>target) - 1;
-                        const sourceCount = getTypeReferenceArity(<TypeReference>source) - (sourceRestType ? 1 : 0);
+                        const targetCount = getTypeReferenceArity(target) - 1;
+                        const sourceCount = getTypeReferenceArity(source) - (sourceRestType ? 1 : 0);
                         for (let i = targetCount; i < sourceCount; i++) {
                             const related = isRelatedTo((<TypeReference>source).typeArguments![i], targetRestType, reportErrors);
                             if (!related) {
@@ -12072,12 +12125,16 @@ namespace ts {
          * Check if a Type was written as a tuple type literal.
          * Prefer using isTupleLikeType() unless the use of `elementTypes` is required.
          */
-        function isTupleType(type: Type): boolean {
+        function isTupleType(type: Type): type is TupleTypeReference {
             return !!(getObjectFlags(type) & ObjectFlags.Reference && (<TypeReference>type).target.objectFlags & ObjectFlags.Tuple);
         }
 
-        function getRestTypeOfTupleType(type: TypeReference) {
-            return (<TupleType>type.target).hasRestElement ? type.typeArguments![type.target.typeParameters!.length - 1] : undefined;
+        function getRestTypeOfTupleType(type: TupleTypeReference) {
+            return type.target.hasRestElement ? type.typeArguments![type.target.typeParameters!.length - 1] : undefined;
+        }
+
+        function getLengthOfTupleType(type: TupleTypeReference) {
+            return getTypeReferenceArity(type) - (type.target.hasRestElement ? 1 : 0);
         }
 
         function getFalsyFlagsOfTypes(types: Type[]): TypeFlags {
@@ -12257,14 +12314,6 @@ namespace ts {
                 // widen accessor based properties here.
                 return prop;
             }
-            if (prop.flags & SymbolFlags.JSContainer) {
-                const node = prop.declarations && first(prop.declarations);
-                const init = getAssignedJavascriptInitializer(node);
-                if (init && init.kind !== SyntaxKind.ObjectLiteralExpression) {
-                    // for JS special declarations, the only kind of initializer that will widen is object literals
-                    return prop;
-                }
-            }
             const original = getTypeOfSymbol(prop);
             const propContext = context && createWideningContext(context, prop.escapedName, /*siblings*/ undefined);
             const widened = getWidenedTypeWithContext(original, propContext);
@@ -12606,10 +12655,15 @@ namespace ts {
             return undefined;
         }
 
+        function tupleTypesDefinitelyUnrelated(source: TupleTypeReference, target: TupleTypeReference) {
+            return target.target.minLength > source.target.minLength ||
+                !getRestTypeOfTupleType(target) && (!!getRestTypeOfTupleType(source) || getLengthOfTupleType(target) < getLengthOfTupleType(source));
+        }
+
         function typesDefinitelyUnrelated(source: Type, target: Type) {
-            // Two tuple types with different arity are definitely unrelated.
+            // Two tuple types with incompatible arities are definitely unrelated.
             // Two object types that each have a property that is unmatched in the other are definitely unrelated.
-            return isTupleType(source) && isTupleType(target) && getTypeReferenceArity(<TypeReference>source) !== getTypeReferenceArity(<TypeReference>target) ||
+            return isTupleType(source) && isTupleType(target) && tupleTypesDefinitelyUnrelated(source, target) ||
                 !!getUnmatchedProperty(source, target, /*requireOptionalProperties*/ false) && !!getUnmatchedProperty(target, source, /*requireOptionalProperties*/ false);
         }
 
@@ -12893,11 +12947,28 @@ namespace ts {
             }
 
             function inferFromProperties(source: Type, target: Type) {
-                const properties = getPropertiesOfObjectType(target);
-                for (const targetProp of properties) {
-                    const sourceProp = getPropertyOfType(source, targetProp.escapedName);
-                    if (sourceProp) {
-                        inferFromTypes(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp));
+                if (isTupleType(source) && isTupleType(target)) {
+                    const sourceLength = getLengthOfTupleType(source);
+                    const targetLength = getLengthOfTupleType(target);
+                    const sourceRestType = getRestTypeOfTupleType(source);
+                    const targetRestType = getRestTypeOfTupleType(target);
+                    const count = sourceRestType && targetRestType ? Math.max(sourceLength, targetLength) + 1 :
+                        sourceRestType ? targetLength :
+                        targetRestType ? sourceLength :
+                        Math.min(sourceLength, targetLength);
+                    for (let i = 0; i < count; i++) {
+                        const s = i < sourceLength ? source.typeArguments![i] : sourceRestType!;
+                        const t = i < targetLength ? target.typeArguments![i] : targetRestType!;
+                        inferFromTypes(s, t);
+                    }
+                }
+                else {
+                    const properties = getPropertiesOfObjectType(target);
+                    for (const targetProp of properties) {
+                        const sourceProp = getPropertyOfType(source, targetProp.escapedName);
+                        if (sourceProp) {
+                            inferFromTypes(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp));
+                        }
                     }
                 }
             }
@@ -14935,6 +15006,10 @@ namespace ts {
                     return getTypeFromTypeNode(jsDocFunctionType.parameters[0].type!);
                 }
             }
+            const thisTag = getJSDocThisTag(node);
+            if (thisTag && thisTag.typeExpression) {
+                return getTypeFromTypeNode(thisTag.typeExpression);
+            }
         }
 
         function isInConstructorArgumentInitializer(node: Node, constructorDecl: Node): boolean {
@@ -16080,19 +16155,6 @@ namespace ts {
             let patternWithComputedProperties = false;
             let hasComputedStringProperty = false;
             let hasComputedNumberProperty = false;
-
-            if (isInJSFile) {
-                const decl = getDeclarationOfJSInitializer(node);
-                if (decl) {
-                    // a JS object literal whose declaration's symbol has exports is a JS namespace
-                    const symbol = getSymbolOfNode(decl);
-                    if (symbol && hasEntries(symbol.exports)) {
-                        propertiesTable = symbol.exports;
-                        symbol.exports.forEach(s => propertiesArray.push(getMergedSymbol(s)));
-                        return createObjectLiteralType();
-                    }
-                }
-            }
             propertiesTable = createSymbolTable();
 
             let offset = 0;
@@ -18971,14 +19033,13 @@ namespace ts {
         }
 
         function invocationError(node: Node, apparentType: Type, kind: SignatureKind) {
-            error(node, kind === SignatureKind.Call
+            invocationErrorRecovery(apparentType, kind, error(node, kind === SignatureKind.Call
                 ? Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures
                 : Diagnostics.Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature
-            , typeToString(apparentType));
-            invocationErrorRecovery(apparentType, kind);
+            , typeToString(apparentType)));
         }
 
-        function invocationErrorRecovery(apparentType: Type, kind: SignatureKind) {
+        function invocationErrorRecovery(apparentType: Type, kind: SignatureKind, diagnostic: Diagnostic) {
             if (!apparentType.symbol) {
                 return;
             }
@@ -18988,7 +19049,8 @@ namespace ts {
             if (importNode && !isImportCall(importNode)) {
                 const sigs = getSignaturesOfType(getTypeOfSymbol(getSymbolLinks(apparentType.symbol).target!), kind);
                 if (!sigs || !sigs.length) return;
-                error(importNode, Diagnostics.A_namespace_style_import_cannot_be_called_or_constructed_and_will_cause_a_failure_at_runtime);
+                diagnostic.relatedInformation = diagnostic.relatedInformation || [];
+                diagnostic.relatedInformation.push(createDiagnosticForNode(importNode, Diagnostics.Type_originates_at_this_import_A_namespace_style_import_cannot_be_called_or_constructed_and_will_cause_a_failure_at_runtime_Consider_using_a_default_import_or_import_require_here_instead));
             }
         }
 
@@ -19067,8 +19129,9 @@ namespace ts {
             if (!callSignatures.length) {
                 let errorInfo = chainDiagnosticMessages(/*details*/ undefined, Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures, typeToString(apparentType));
                 errorInfo = chainDiagnosticMessages(errorInfo, headMessage);
-                diagnostics.add(createDiagnosticForNodeFromMessageChain(node, errorInfo));
-                invocationErrorRecovery(apparentType, SignatureKind.Call);
+                const diag = createDiagnosticForNodeFromMessageChain(node, errorInfo);
+                diagnostics.add(diag);
+                invocationErrorRecovery(apparentType, SignatureKind.Call, diag);
                 return resolveErrorCall(node);
             }
 
@@ -20644,9 +20707,15 @@ namespace ts {
                         getUnionType([removeDefinitelyFalsyTypes(leftType), rightType], UnionReduction.Subtype) :
                         leftType;
                 case SyntaxKind.EqualsToken:
-                    checkSpecialAssignment(left, right);
-                    checkAssignmentOperator(rightType);
-                    return getRegularTypeOfObjectLiteral(rightType);
+                    const special = getSpecialPropertyAssignmentKind(left.parent as BinaryExpression);
+                    checkSpecialAssignment(special, right);
+                    if (isJSSpecialPropertyAssignment(special)) {
+                        return leftType;
+                    }
+                    else {
+                        checkAssignmentOperator(rightType);
+                        return getRegularTypeOfObjectLiteral(rightType);
+                    }
                 case SyntaxKind.CommaToken:
                     if (!compilerOptions.allowUnreachableCode && isSideEffectFree(left) && !isEvalNode(right)) {
                         error(left, Diagnostics.Left_side_of_comma_operator_is_unused_and_has_no_side_effects);
@@ -20657,8 +20726,7 @@ namespace ts {
                     return Debug.fail();
             }
 
-            function checkSpecialAssignment(left: Node, right: Expression) {
-                const special = getSpecialPropertyAssignmentKind(left.parent as BinaryExpression);
+            function checkSpecialAssignment(special: SpecialPropertyAssignmentKind, right: Expression) {
                 if (special === SpecialPropertyAssignmentKind.ModuleExports) {
                     const rightType = checkExpression(right, checkMode);
                     for (const prop of getPropertiesOfObjectType(rightType)) {
@@ -20717,6 +20785,7 @@ namespace ts {
                     // requires VarExpr to be classified as a reference
                     // A compound assignment furthermore requires VarExpr to be classified as a reference (section 4.1)
                     // and the type of the non-compound operation to be assignable to the type of VarExpr.
+
                     if (checkReferenceExpression(left, Diagnostics.The_left_hand_side_of_an_assignment_expression_must_be_a_variable_or_a_property_access)
                         && (!isIdentifier(left) || unescapeLeadingUnderscores(left.escapedText) !== "exports")) {
                         // to avoid cascading errors check assignability only if 'isReference' check succeeded and no errors were reported
@@ -20725,6 +20794,23 @@ namespace ts {
                 }
             }
 
+            function isJSSpecialPropertyAssignment(special: SpecialPropertyAssignmentKind) {
+                switch (special) {
+                    case SpecialPropertyAssignmentKind.ExportsProperty:
+                    case SpecialPropertyAssignmentKind.ModuleExports:
+                    case SpecialPropertyAssignmentKind.Property:
+                    case SpecialPropertyAssignmentKind.Prototype:
+                    case SpecialPropertyAssignmentKind.PrototypeProperty:
+                    case SpecialPropertyAssignmentKind.ThisProperty:
+                        const symbol = getSymbolOfNode(left);
+                        const init = getAssignedJavascriptInitializer(right);
+                        return init && isObjectLiteralExpression(init) &&
+                            symbol && hasEntries(symbol.exports);
+                    default:
+                        return false;
+                }
+            }
+
             function reportOperatorError() {
                 error(errorNode || operatorToken, Diagnostics.Operator_0_cannot_be_applied_to_types_1_and_2, tokenToString(operatorToken.kind), typeToString(leftType), typeToString(rightType));
             }
@@ -22751,6 +22837,10 @@ namespace ts {
             checkSourceElement(node.typeExpression);
         }
 
+        function checkJSDocTypeTag(node: JSDocTypeTag) {
+            checkSourceElement(node.typeExpression);
+        }
+
         function checkJSDocParameterTag(node: JSDocParameterTag) {
             checkSourceElement(node.typeExpression);
             if (!getParameterSymbolFromJSDoc(node)) {
@@ -23045,7 +23135,11 @@ namespace ts {
                 }
 
                 for (const declaration of local.declarations) {
-                    if (isAmbientModule(declaration)) continue;
+                    if (isAmbientModule(declaration) ||
+                        (isVariableDeclaration(declaration) && isForInOrOfStatement(declaration.parent.parent) || isImportedDeclaration(declaration)) && isIdentifierThatStartsWithUnderScore(declaration.name!)) {
+                        continue;
+                    }
+
                     if (isImportedDeclaration(declaration)) {
                         addToGroup(unusedImports, importClauseFromImported(declaration), declaration, getNodeId);
                     }
@@ -23057,9 +23151,7 @@ namespace ts {
                         }
                     }
                     else if (isVariableDeclaration(declaration)) {
-                        if (!isIdentifierThatStartsWithUnderScore(declaration.name) || !isForInOrOfStatement(declaration.parent.parent)) {
-                            addToGroup(unusedVariables, declaration.parent, declaration, getNodeId);
-                        }
+                        addToGroup(unusedVariables, declaration.parent, declaration, getNodeId);
                     }
                     else {
                         const parameter = local.valueDeclaration && tryGetRootParameterDeclaration(local.valueDeclaration);
@@ -23502,9 +23594,15 @@ namespace ts {
                 // Node is the primary declaration of the symbol, just validate the initializer
                 // Don't validate for-in initializer as it is already an error
                 const initializer = getEffectiveInitializer(node);
-                if (initializer && node.parent.parent.kind !== SyntaxKind.ForInStatement) {
-                    checkTypeAssignableTo(checkExpressionCached(initializer), type, node, /*headMessage*/ undefined);
-                    checkParameterInitializer(node);
+                if (initializer) {
+                    const isJSObjectLiteralInitializer = isInJavaScriptFile(node) &&
+                        isObjectLiteralExpression(initializer) &&
+                        (initializer.properties.length === 0 || isPrototypeAccess(node.name)) &&
+                        hasEntries(symbol.exports);
+                    if (!isJSObjectLiteralInitializer && node.parent.parent.kind !== SyntaxKind.ForInStatement) {
+                        checkTypeAssignableTo(checkExpressionCached(initializer), type, node, /*headMessage*/ undefined);
+                        checkParameterInitializer(node);
+                    }
                 }
             }
             else {
@@ -25706,6 +25804,8 @@ namespace ts {
                 case SyntaxKind.JSDocTypedefTag:
                 case SyntaxKind.JSDocCallbackTag:
                     return checkJSDocTypeAliasTag(node as JSDocTypedefTag);
+                case SyntaxKind.JSDocTypeTag:
+                    return checkJSDocTypeTag(node as JSDocTypeTag);
                 case SyntaxKind.JSDocParameterTag:
                     return checkJSDocParameterTag(node as JSDocParameterTag);
                 case SyntaxKind.JSDocFunctionType:
diff --git a/src/parser/commandLineParser.ts b/src/compiler/commandLineParser.ts
similarity index 97%
rename from src/parser/commandLineParser.ts
rename to src/compiler/commandLineParser.ts
index d7760d1f75fd1..f8648636c8a39 100644
--- a/src/parser/commandLineParser.ts
+++ b/src/compiler/commandLineParser.ts
@@ -475,7 +475,6 @@ namespace ts {
         {
             name: "sourceRoot",
             type: "string",
-            isFilePath: true,
             paramType: Diagnostics.LOCATION,
             category: Diagnostics.Source_Map_Options,
             description: Diagnostics.Specify_the_location_where_debugger_should_locate_TypeScript_files_instead_of_source_locations,
@@ -483,7 +482,6 @@ namespace ts {
         {
             name: "mapRoot",
             type: "string",
-            isFilePath: true,
             paramType: Diagnostics.LOCATION,
             category: Diagnostics.Source_Map_Options,
             description: Diagnostics.Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations,
diff --git a/src/core/core.ts b/src/compiler/core.ts
similarity index 97%
rename from src/core/core.ts
rename to src/compiler/core.ts
index 20a4677d67201..c2946aa5a25a4 100644
--- a/src/core/core.ts
+++ b/src/compiler/core.ts
@@ -19,21 +19,7 @@ namespace ts {
     export interface SortedArray<T> extends Array<T> {
         " __sortedArrayBrand": any;
     }
-}
-
-/* @internal */
-namespace ts {
-    /* @internal */
-    export type EqualityComparer<T> = (a: T, b: T) => boolean;
-
-    /* @internal */
-    export type Comparer<T> = (a: T, b: T) => Comparison;
 
-    export const enum Comparison {
-        LessThan    = -1,
-        EqualTo     = 0,
-        GreaterThan = 1
-    }
 
     /** ES6 Map interface, only read methods included. */
     export interface ReadonlyMap<T> {
@@ -63,6 +49,23 @@ namespace ts {
         push(...values: T[]): void;
     }
 
+    /* @internal */
+    export type EqualityComparer<T> = (a: T, b: T) => boolean;
+
+    /* @internal */
+    export type Comparer<T> = (a: T, b: T) => Comparison;
+
+    /* @internal */
+    export const enum Comparison {
+        LessThan    = -1,
+        EqualTo     = 0,
+        GreaterThan = 1
+    }
+}
+
+/* @internal */
+namespace ts {
+
     /** Create a MapLike with good performance. */
     function createDictionaryObject<T>(): MapLike<T> {
         const map = Object.create(/*prototype*/ null); // tslint:disable-line:no-null-keyword
diff --git a/src/parser/diagnosticMessages.json b/src/compiler/diagnosticMessages.json
similarity index 96%
rename from src/parser/diagnosticMessages.json
rename to src/compiler/diagnosticMessages.json
index 3f54147770d85..e423bcdaf3519 100644
--- a/src/parser/diagnosticMessages.json
+++ b/src/compiler/diagnosticMessages.json
@@ -3824,7 +3824,7 @@
         "category": "Message",
         "code": 7037
     },
-    "A namespace-style import cannot be called or constructed, and will cause a failure at runtime.": {
+    "Type originates at this import. A namespace-style import cannot be called or constructed, and will cause a failure at runtime. Consider using a default import or import require here instead.": {
         "category": "Error",
         "code": 7038
     },
diff --git a/src/compiler/factory.ts b/src/compiler/factory.ts
index 95fe9d8a327f0..22f706d6b53ea 100644
--- a/src/compiler/factory.ts
+++ b/src/compiler/factory.ts
@@ -2611,18 +2611,41 @@ namespace ts {
         return node;
     }
 
-    export function createUnparsedSourceFile(text: string, map?: string): UnparsedSource {
+    export function createUnparsedSourceFile(text: string): UnparsedSource;
+    export function createUnparsedSourceFile(text: string, mapPath: string | undefined, map: string | undefined): UnparsedSource;
+    export function createUnparsedSourceFile(text: string, mapPath?: string, map?: string): UnparsedSource {
         const node = <UnparsedSource>createNode(SyntaxKind.UnparsedSource);
         node.text = text;
+        node.sourceMapPath = mapPath;
         node.sourceMapText = map;
         return node;
     }
-
-    export function createInputFiles(javascript: string, declaration: string, javascriptMapText?: string, declarationMapText?: string): InputFiles {
+    export function createInputFiles(
+        javascript: string,
+        declaration: string
+    ): InputFiles;
+    export function createInputFiles(
+        javascript: string,
+        declaration: string,
+        javascriptMapPath: string | undefined,
+        javascriptMapText: string | undefined,
+        declarationMapPath: string | undefined,
+        declarationMapText: string | undefined
+    ): InputFiles;
+    export function createInputFiles(
+        javascript: string,
+        declaration: string,
+        javascriptMapPath?: string,
+        javascriptMapText?: string,
+        declarationMapPath?: string,
+        declarationMapText?: string
+    ): InputFiles {
         const node = <InputFiles>createNode(SyntaxKind.InputFiles);
         node.javascriptText = javascript;
+        node.javascriptMapPath = javascriptMapPath;
         node.javascriptMapText = javascriptMapText;
         node.declarationText = declaration;
+        node.declarationMapPath = declarationMapPath;
         node.declarationMapText = declarationMapText;
         return node;
     }
diff --git a/src/parser/moduleNameResolver.ts b/src/compiler/moduleNameResolver.ts
similarity index 100%
rename from src/parser/moduleNameResolver.ts
rename to src/compiler/moduleNameResolver.ts
diff --git a/src/compiler/moduleSpecifiers.ts b/src/compiler/moduleSpecifiers.ts
index 6da0fc61e63d7..3ab03ecbbfcb8 100644
--- a/src/compiler/moduleSpecifiers.ts
+++ b/src/compiler/moduleSpecifiers.ts
@@ -15,17 +15,20 @@ namespace ts.moduleSpecifiers {
     // For each symlink/original for a module, returns a list of ways to import that file.
     export function getModuleSpecifiers(
         moduleSymbol: Symbol,
-        program: Program,
+        compilerOptions: CompilerOptions,
         importingSourceFile: SourceFile,
         host: ModuleSpecifierResolutionHost,
+        files: ReadonlyArray<SourceFile>,
         preferences: ModuleSpecifierPreferences,
     ): ReadonlyArray<ReadonlyArray<string>> {
         const ambient = tryGetModuleNameFromAmbientModule(moduleSymbol);
         if (ambient) return [[ambient]];
 
-        const compilerOptions = program.getCompilerOptions();
-        const info = getInfo(compilerOptions, importingSourceFile, importingSourceFile.fileName, host);
-        const modulePaths = getAllModulePaths(program, getSourceFileOfNode(moduleSymbol.valueDeclaration));
+        const info = getInfo(compilerOptions, importingSourceFile, importingSourceFile.path, host);
+        if (!files) {
+            return Debug.fail("Files list must be present to resolve symlinks in specifier resolution");
+        }
+        const modulePaths = getAllModulePaths(files, getSourceFileOfNode(moduleSymbol.valueDeclaration), info.getCanonicalFileName, host);
 
         const global = mapDefined(modulePaths, moduleFileName => getGlobalModuleSpecifier(moduleFileName, info, host, compilerOptions));
         return global.length ? global.map(g => [g]) : modulePaths.map(moduleFileName =>
@@ -130,15 +133,58 @@ namespace ts.moduleSpecifiers {
         return firstDefined(imports, ({ text }) => pathIsRelative(text) ? fileExtensionIs(text, Extension.Js) : undefined) || false;
     }
 
+    function discoverProbableSymlinks(files: ReadonlyArray<SourceFile>, getCanonicalFileName: (file: string) => string, host: ModuleSpecifierResolutionHost) {
+        const symlinks = mapDefined(files, sf =>
+            sf.resolvedModules && firstDefinedIterator(sf.resolvedModules.values(), res =>
+                res && res.originalPath && res.resolvedFileName !== res.originalPath ? [res.resolvedFileName, res.originalPath] : undefined));
+        const result = createMap<string>();
+        if (symlinks) {
+            const currentDirectory = host.getCurrentDirectory ? host.getCurrentDirectory() : "";
+            for (const [resolvedPath, originalPath] of symlinks) {
+                const resolvedParts = getPathComponents(toPath(resolvedPath, currentDirectory, getCanonicalFileName));
+                const originalParts = getPathComponents(toPath(originalPath, currentDirectory, getCanonicalFileName));
+                while (resolvedParts[resolvedParts.length - 1] === originalParts[originalParts.length - 1]) {
+                    resolvedParts.pop();
+                    originalParts.pop();
+                }
+                result.set(getPathFromPathComponents(originalParts), getPathFromPathComponents(resolvedParts));
+            }
+        }
+        return result;
+    }
+
+    function getAllModulePathsUsingIndirectSymlinks(files: ReadonlyArray<SourceFile>, target: string, getCanonicalFileName: (file: string) => string, host: ModuleSpecifierResolutionHost) {
+        const links = discoverProbableSymlinks(files, getCanonicalFileName, host);
+        const paths = arrayFrom(links.keys());
+        let options: string[] | undefined;
+        const compareStrings = (!host.useCaseSensitiveFileNames || host.useCaseSensitiveFileNames()) ? compareStringsCaseSensitive : compareStringsCaseInsensitive;
+        for (const path of paths) {
+            const resolved = links.get(path)!;
+            if (compareStrings(target.slice(0, resolved.length + 1), resolved + "/") === Comparison.EqualTo) {
+                const relative = getRelativePathFromDirectory(resolved, target, getCanonicalFileName);
+                const option = resolvePath(path, relative);
+                if (!host.fileExists || host.fileExists(option)) {
+                    if (!options) options = [];
+                    options.push(option);
+                }
+            }
+        }
+        if (options) {
+            options.push(target); // Since these are speculative, we also include the original resolved name as a possibility
+            return options;
+        }
+        return [target];
+    }
+
     /**
      * Looks for a existing imports that use symlinks to this module.
      * Only if no symlink is available, the real path will be used.
      */
-    function getAllModulePaths(program: Program, { fileName }: SourceFile): ReadonlyArray<string> {
-        const symlinks = mapDefined(program.getSourceFiles(), sf =>
+    function getAllModulePaths(files: ReadonlyArray<SourceFile>, { fileName }: SourceFile, getCanonicalFileName: (file: string) => string, host: ModuleSpecifierResolutionHost): ReadonlyArray<string> {
+        const symlinks = mapDefined(files, sf =>
             sf.resolvedModules && firstDefinedIterator(sf.resolvedModules.values(), res =>
                 res && res.resolvedFileName === fileName ? res.originalPath : undefined));
-        return symlinks.length === 0 ? [fileName] : symlinks;
+        return symlinks.length === 0 ? getAllModulePathsUsingIndirectSymlinks(files, getNormalizedAbsolutePath(fileName, host.getCurrentDirectory ? host.getCurrentDirectory() : ""), getCanonicalFileName, host) : symlinks;
     }
 
     function getRelativePathNParents(relativePath: string): number {
diff --git a/src/parser/parser.ts b/src/compiler/parser.ts
similarity index 97%
rename from src/parser/parser.ts
rename to src/compiler/parser.ts
index 460464b046565..1f2527f82585e 100644
--- a/src/parser/parser.ts
+++ b/src/compiler/parser.ts
@@ -489,6 +489,8 @@ namespace ts {
             case SyntaxKind.JSDocCallbackTag:
                 return visitNode(cbNode, (node as JSDocCallbackTag).fullName) ||
                     visitNode(cbNode, (node as JSDocCallbackTag).typeExpression);
+            case SyntaxKind.JSDocThisTag:
+                return visitNode(cbNode, (node as JSDocThisTag).typeExpression);
             case SyntaxKind.JSDocSignature:
                 return visitNodes(cbNode, cbNodes, node.decorators) ||
                     visitNodes(cbNode, cbNodes, node.modifiers) ||
@@ -6509,6 +6511,9 @@ namespace ts {
                         case "constructor":
                             tag = parseClassTag(atToken, tagName);
                             break;
+                        case "this":
+                            tag = parseThisTag(atToken, tagName);
+                            break;
                         case "arg":
                         case "argument":
                         case "param":
@@ -6780,6 +6785,15 @@ namespace ts {
                     return finishNode(tag);
                 }
 
+                function parseThisTag(atToken: AtToken, tagName: Identifier): JSDocThisTag {
+                    const tag = <JSDocThisTag>createNode(SyntaxKind.JSDocThisTag, atToken.pos);
+                    tag.atToken = atToken;
+                    tag.tagName = tagName;
+                    tag.typeExpression = parseJSDocTypeExpression(/*mayOmitBraces*/ true);
+                    skipWhitespace();
+                    return finishNode(tag);
+                }
+
                 function parseTypedefTag(atToken: AtToken, tagName: Identifier, indent: number): JSDocTypedefTag {
                     const typeExpression = tryParseTypeExpression();
                     skipWhitespace();
diff --git a/src/core/performance.ts b/src/compiler/performance.ts
similarity index 100%
rename from src/core/performance.ts
rename to src/compiler/performance.ts
diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index 8a741cc93d088..3289271e7c6df 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -252,7 +252,9 @@ namespace ts {
     const gutterSeparator = " ";
     const resetEscapeSequence = "\u001b[0m";
     const ellipsis = "...";
-    function getCategoryFormat(category: DiagnosticCategory): string {
+    const halfIndent = "  ";
+    const indent = "    ";
+    function getCategoryFormat(category: DiagnosticCategory): ForegroundColorEscapeSequences {
         switch (category) {
             case DiagnosticCategory.Error: return ForegroundColorEscapeSequences.Red;
             case DiagnosticCategory.Warning: return ForegroundColorEscapeSequences.Yellow;
@@ -273,68 +275,79 @@ namespace ts {
         return s;
     }
 
+    function formatCodeSpan(file: SourceFile, start: number, length: number, indent: string, squiggleColor: ForegroundColorEscapeSequences, host: FormatDiagnosticsHost) {
+        const { line: firstLine, character: firstLineChar } = getLineAndCharacterOfPosition(file, start);
+        const { line: lastLine, character: lastLineChar } = getLineAndCharacterOfPosition(file, start + length);
+        const lastLineInFile = getLineAndCharacterOfPosition(file, file.text.length).line;
+
+        const hasMoreThanFiveLines = (lastLine - firstLine) >= 4;
+        let gutterWidth = (lastLine + 1 + "").length;
+        if (hasMoreThanFiveLines) {
+            gutterWidth = Math.max(ellipsis.length, gutterWidth);
+        }
+
+        let context = "";
+        for (let i = firstLine; i <= lastLine; i++) {
+            context += host.getNewLine();
+            // If the error spans over 5 lines, we'll only show the first 2 and last 2 lines,
+            // so we'll skip ahead to the second-to-last line.
+            if (hasMoreThanFiveLines && firstLine + 1 < i && i < lastLine - 1) {
+                context += indent + formatColorAndReset(padLeft(ellipsis, gutterWidth), gutterStyleSequence) + gutterSeparator + host.getNewLine();
+                i = lastLine - 1;
+            }
+
+            const lineStart = getPositionOfLineAndCharacter(file, i, 0);
+            const lineEnd = i < lastLineInFile ? getPositionOfLineAndCharacter(file, i + 1, 0) : file.text.length;
+            let lineContent = file.text.slice(lineStart, lineEnd);
+            lineContent = lineContent.replace(/\s+$/g, "");  // trim from end
+            lineContent = lineContent.replace("\t", " ");    // convert tabs to single spaces
+
+            // Output the gutter and the actual contents of the line.
+            context += indent + formatColorAndReset(padLeft(i + 1 + "", gutterWidth), gutterStyleSequence) + gutterSeparator;
+            context += lineContent + host.getNewLine();
+
+            // Output the gutter and the error span for the line using tildes.
+            context += indent + formatColorAndReset(padLeft("", gutterWidth), gutterStyleSequence) + gutterSeparator;
+            context += squiggleColor;
+            if (i === firstLine) {
+                // If we're on the last line, then limit it to the last character of the last line.
+                // Otherwise, we'll just squiggle the rest of the line, giving 'slice' no end position.
+                const lastCharForLine = i === lastLine ? lastLineChar : undefined;
+
+                context += lineContent.slice(0, firstLineChar).replace(/\S/g, " ");
+                context += lineContent.slice(firstLineChar, lastCharForLine).replace(/./g, "~");
+            }
+            else if (i === lastLine) {
+                context += lineContent.slice(0, lastLineChar).replace(/./g, "~");
+            }
+            else {
+                // Squiggle the entire line.
+                context += lineContent.replace(/./g, "~");
+            }
+            context += resetEscapeSequence;
+        }
+        return context;
+    }
+
+    function formatLocation(file: SourceFile, start: number, host: FormatDiagnosticsHost) {
+        const { line: firstLine, character: firstLineChar } = getLineAndCharacterOfPosition(file, start); // TODO: GH#18217
+        const relativeFileName = host ? convertToRelativePath(file.fileName, host.getCurrentDirectory(), fileName => host.getCanonicalFileName(fileName)) : file.fileName;
+
+        let output = "";
+        output += formatColorAndReset(relativeFileName, ForegroundColorEscapeSequences.Cyan);
+        output += ":";
+        output += formatColorAndReset(`${firstLine + 1}`, ForegroundColorEscapeSequences.Yellow);
+        output += ":";
+        output += formatColorAndReset(`${firstLineChar + 1}`, ForegroundColorEscapeSequences.Yellow);
+        return output;
+    }
+
     export function formatDiagnosticsWithColorAndContext(diagnostics: ReadonlyArray<Diagnostic>, host: FormatDiagnosticsHost): string {
         let output = "";
         for (const diagnostic of diagnostics) {
-            let context = "";
             if (diagnostic.file) {
-                const { start, length, file } = diagnostic;
-                const { line: firstLine, character: firstLineChar } = getLineAndCharacterOfPosition(file, start!); // TODO: GH#18217
-                const { line: lastLine, character: lastLineChar } = getLineAndCharacterOfPosition(file, start! + length!);
-                const lastLineInFile = getLineAndCharacterOfPosition(file, file.text.length).line;
-                const relativeFileName = host ? convertToRelativePath(file.fileName, host.getCurrentDirectory(), fileName => host.getCanonicalFileName(fileName)) : file.fileName;
-
-                const hasMoreThanFiveLines = (lastLine - firstLine) >= 4;
-                let gutterWidth = (lastLine + 1 + "").length;
-                if (hasMoreThanFiveLines) {
-                    gutterWidth = Math.max(ellipsis.length, gutterWidth);
-                }
-
-                for (let i = firstLine; i <= lastLine; i++) {
-                    context += host.getNewLine();
-                    // If the error spans over 5 lines, we'll only show the first 2 and last 2 lines,
-                    // so we'll skip ahead to the second-to-last line.
-                    if (hasMoreThanFiveLines && firstLine + 1 < i && i < lastLine - 1) {
-                        context += formatColorAndReset(padLeft(ellipsis, gutterWidth), gutterStyleSequence) + gutterSeparator + host.getNewLine();
-                        i = lastLine - 1;
-                    }
-
-                    const lineStart = getPositionOfLineAndCharacter(file, i, 0);
-                    const lineEnd = i < lastLineInFile ? getPositionOfLineAndCharacter(file, i + 1, 0) : file.text.length;
-                    let lineContent = file.text.slice(lineStart, lineEnd);
-                    lineContent = lineContent.replace(/\s+$/g, "");  // trim from end
-                    lineContent = lineContent.replace("\t", " ");    // convert tabs to single spaces
-
-                    // Output the gutter and the actual contents of the line.
-                    context += formatColorAndReset(padLeft(i + 1 + "", gutterWidth), gutterStyleSequence) + gutterSeparator;
-                    context += lineContent + host.getNewLine();
-
-                    // Output the gutter and the error span for the line using tildes.
-                    context += formatColorAndReset(padLeft("", gutterWidth), gutterStyleSequence) + gutterSeparator;
-                    context += ForegroundColorEscapeSequences.Red;
-                    if (i === firstLine) {
-                        // If we're on the last line, then limit it to the last character of the last line.
-                        // Otherwise, we'll just squiggle the rest of the line, giving 'slice' no end position.
-                        const lastCharForLine = i === lastLine ? lastLineChar : undefined;
-
-                        context += lineContent.slice(0, firstLineChar).replace(/\S/g, " ");
-                        context += lineContent.slice(firstLineChar, lastCharForLine).replace(/./g, "~");
-                    }
-                    else if (i === lastLine) {
-                        context += lineContent.slice(0, lastLineChar).replace(/./g, "~");
-                    }
-                    else {
-                        // Squiggle the entire line.
-                        context += lineContent.replace(/./g, "~");
-                    }
-                    context += resetEscapeSequence;
-                }
-
-                output += formatColorAndReset(relativeFileName, ForegroundColorEscapeSequences.Cyan);
-                output += ":";
-                output += formatColorAndReset(`${firstLine + 1}`, ForegroundColorEscapeSequences.Yellow);
-                output += ":";
-                output += formatColorAndReset(`${firstLineChar + 1}`, ForegroundColorEscapeSequences.Yellow);
+                const { file, start } = diagnostic;
+                output += formatLocation(file, start!, host); // TODO: GH#18217
                 output += " - ";
             }
 
@@ -344,7 +357,19 @@ namespace ts {
 
             if (diagnostic.file) {
                 output += host.getNewLine();
-                output += context;
+                output += formatCodeSpan(diagnostic.file, diagnostic.start!, diagnostic.length!, "", getCategoryFormat(diagnostic.category), host); // TODO: GH#18217
+                if (diagnostic.relatedInformation) {
+                    output += host.getNewLine();
+                    for (const { file, start, length, messageText } of diagnostic.relatedInformation) {
+                        if (file) {
+                            output += host.getNewLine();
+                            output += halfIndent + formatLocation(file, start!, host); // TODO: GH#18217
+                            output += formatCodeSpan(file, start!, length!, indent, ForegroundColorEscapeSequences.Cyan, host); // TODO: GH#18217
+                        }
+                        output += host.getNewLine();
+                        output += indent + flattenDiagnosticMessageText(messageText, host.getNewLine());
+                    }
+                }
             }
 
             output += host.getNewLine();
@@ -1240,10 +1265,12 @@ namespace ts {
 
                     const dtsFilename = changeExtension(resolvedRefOpts.options.outFile, ".d.ts");
                     const js = host.readFile(resolvedRefOpts.options.outFile) || `/* Input file ${resolvedRefOpts.options.outFile} was missing */\r\n`;
-                    const jsMap = host.readFile(resolvedRefOpts.options.outFile + ".map"); // TODO: try to read sourceMappingUrl comment from the js file
+                    const jsMapPath = resolvedRefOpts.options.outFile + ".map"; // TODO: try to read sourceMappingUrl comment from the file
+                    const jsMap = host.readFile(jsMapPath);
                     const dts = host.readFile(dtsFilename) || `/* Input file ${dtsFilename} was missing */\r\n`;
-                    const dtsMap = host.readFile(dtsFilename + ".map");
-                    const node = createInputFiles(js, dts, jsMap, dtsMap);
+                    const dtsMapPath = dtsFilename + ".map";
+                    const dtsMap = host.readFile(dtsMapPath);
+                    const node = createInputFiles(js, dts, jsMap && jsMapPath, jsMap, dtsMap && dtsMapPath, dtsMap);
                     nodes.push(node);
                 }
             }
diff --git a/src/compiler/resolutionCache.ts b/src/compiler/resolutionCache.ts
index de84b9bb6659e..d5f574762a1c8 100644
--- a/src/compiler/resolutionCache.ts
+++ b/src/compiler/resolutionCache.ts
@@ -60,11 +60,14 @@ namespace ts {
         watcher: FileWatcher;
         /** ref count keeping this directory watch alive */
         refCount: number;
+        /** is the directory watched being non recursive */
+        nonRecursive?: boolean;
     }
 
     interface DirectoryOfFailedLookupWatch {
         dir: string;
         dirPath: Path;
+        nonRecursive?: boolean;
         ignore?: true;
     }
 
@@ -251,7 +254,6 @@ namespace ts {
                 perDirectoryResolution = createMap();
                 perDirectoryCache.set(dirPath, perDirectoryResolution);
             }
-
             const resolvedModules: R[] = [];
             const compilerOptions = resolutionHost.getCompilationSettings();
             const hasInvalidatedNonRelativeUnresolvedImport = logChanges && isFileWithInvalidatedNonRelativeUnresolvedImports(path);
@@ -393,6 +395,7 @@ namespace ts {
 
         function getDirectoryToWatchFailedLookupLocation(failedLookupLocation: string, failedLookupLocationPath: Path): DirectoryOfFailedLookupWatch {
             if (isInDirectoryPath(rootPath, failedLookupLocationPath)) {
+                // Always watch root directory recursively
                 return { dir: rootDir!, dirPath: rootPath }; // TODO: GH#18217
             }
 
@@ -409,11 +412,12 @@ namespace ts {
                 dirPath = getDirectoryPath(dirPath);
             }
 
-            // If the directory is node_modules use it to watch
+            // If the directory is node_modules use it to watch, always watch it recursively
             if (isNodeModulesDirectory(dirPath)) {
                 return filterFSRootDirectoriesToWatch({ dir, dirPath }, getDirectoryPath(dirPath));
             }
 
+            let nonRecursive = true;
             // Use some ancestor of the root directory
             let subDirectoryPath: Path | undefined, subDirectory: string | undefined;
             if (rootPath !== undefined) {
@@ -422,6 +426,7 @@ namespace ts {
                     if (parentPath === dirPath) {
                         break;
                     }
+                    nonRecursive = false;
                     subDirectoryPath = dirPath;
                     subDirectory = dir;
                     dirPath = parentPath;
@@ -429,7 +434,7 @@ namespace ts {
                 }
             }
 
-            return filterFSRootDirectoriesToWatch({ dir: subDirectory || dir, dirPath: subDirectoryPath || dirPath }, dirPath);
+            return filterFSRootDirectoriesToWatch({ dir: subDirectory || dir, dirPath: subDirectoryPath || dirPath, nonRecursive }, dirPath);
         }
 
         function isPathWithDefaultFailedLookupExtension(path: Path) {
@@ -452,7 +457,7 @@ namespace ts {
             let setAtRoot = false;
             for (const failedLookupLocation of failedLookupLocations) {
                 const failedLookupLocationPath = resolutionHost.toPath(failedLookupLocation);
-                const { dir, dirPath, ignore } = getDirectoryToWatchFailedLookupLocation(failedLookupLocation, failedLookupLocationPath);
+                const { dir, dirPath, nonRecursive, ignore } = getDirectoryToWatchFailedLookupLocation(failedLookupLocation, failedLookupLocationPath);
                 if (!ignore) {
                     // If the failed lookup location path is not one of the supported extensions,
                     // store it in the custom path
@@ -464,23 +469,25 @@ namespace ts {
                         setAtRoot = true;
                     }
                     else {
-                        setDirectoryWatcher(dir, dirPath);
+                        setDirectoryWatcher(dir, dirPath, nonRecursive);
                     }
                 }
             }
 
             if (setAtRoot) {
+                // This is always recursive
                 setDirectoryWatcher(rootDir!, rootPath); // TODO: GH#18217
             }
         }
 
-        function setDirectoryWatcher(dir: string, dirPath: Path) {
+        function setDirectoryWatcher(dir: string, dirPath: Path, nonRecursive?: boolean) {
             const dirWatcher = directoryWatchesOfFailedLookups.get(dirPath);
             if (dirWatcher) {
+                Debug.assert(!!nonRecursive === !!dirWatcher.nonRecursive);
                 dirWatcher.refCount++;
             }
             else {
-                directoryWatchesOfFailedLookups.set(dirPath, { watcher: createDirectoryWatcher(dir, dirPath), refCount: 1 });
+                directoryWatchesOfFailedLookups.set(dirPath, { watcher: createDirectoryWatcher(dir, dirPath, nonRecursive), refCount: 1, nonRecursive });
             }
         }
 
@@ -530,7 +537,7 @@ namespace ts {
             dirWatcher.refCount--;
         }
 
-        function createDirectoryWatcher(directory: string, dirPath: Path) {
+        function createDirectoryWatcher(directory: string, dirPath: Path, nonRecursive: boolean | undefined) {
             return resolutionHost.watchDirectoryOfFailedLookupLocation(directory, fileOrDirectory => {
                 const fileOrDirectoryPath = resolutionHost.toPath(fileOrDirectory);
                 if (cachedDirectoryStructureHost) {
@@ -541,7 +548,7 @@ namespace ts {
                 if (!allFilesHaveInvalidatedResolution && invalidateResolutionOfFailedLookupLocation(fileOrDirectoryPath, dirPath === fileOrDirectoryPath)) {
                     resolutionHost.onInvalidatedResolution();
                 }
-            }, WatchDirectoryFlags.Recursive);
+            }, nonRecursive ? WatchDirectoryFlags.None : WatchDirectoryFlags.Recursive);
         }
 
         function removeResolutionsOfFileFromCache(cache: Map<Map<ResolutionWithFailedLookupLocations>>, filePath: Path) {
diff --git a/src/parser/scanner.ts b/src/compiler/scanner.ts
similarity index 100%
rename from src/parser/scanner.ts
rename to src/compiler/scanner.ts
diff --git a/src/compiler/sourcemap.ts b/src/compiler/sourcemap.ts
index 8ef71ecf9556d..b3266ac78adde 100644
--- a/src/compiler/sourcemap.ts
+++ b/src/compiler/sourcemap.ts
@@ -64,10 +64,10 @@ namespace ts {
 
     // Used for initialize lastEncodedSourceMapSpan and reset lastEncodedSourceMapSpan when updateLastEncodedAndRecordedSpans
     const defaultLastEncodedSourceMapSpan: SourceMapSpan = {
-        emittedLine: 1,
-        emittedColumn: 1,
-        sourceLine: 1,
-        sourceColumn: 1,
+        emittedLine: 0,
+        emittedColumn: 0,
+        sourceLine: 0,
+        sourceColumn: 0,
         sourceIndex: 0
     };
 
@@ -99,10 +99,6 @@ namespace ts {
         let sourceMapDataList: SourceMapData[] | undefined;
         let disabled: boolean = !(compilerOptions.sourceMap || compilerOptions.inlineSourceMap);
 
-        let completedSections: SourceMapSectionDefinition[];
-        let sectionStartLine: number;
-        let sectionStartColumn: number;
-
         return {
             initialize,
             reset,
@@ -150,9 +146,6 @@ namespace ts {
             lastEncodedNameIndex = 0;
 
             // Initialize source map data
-            completedSections = [];
-            sectionStartLine = 1;
-            sectionStartColumn = 1;
             sourceMapData = {
                 sourceMapFilePath,
                 jsSourceMappingURL: !compilerOptions.inlineSourceMap ? getBaseFileName(normalizeSlashes(sourceMapFilePath)) : undefined!, // TODO: GH#18217
@@ -221,9 +214,6 @@ namespace ts {
             lastEncodedNameIndex = undefined;
             sourceMapData = undefined!;
             sourceMapDataList = undefined!;
-            completedSections = undefined!;
-            sectionStartLine = undefined!;
-            sectionStartColumn = undefined!;
         }
 
         interface SourceMapSection {
@@ -233,7 +223,7 @@ namespace ts {
             sources: string[];
             names?: string[];
             mappings: string;
-            sourcesContent?: string[];
+            sourcesContent?: (string | null)[];
             sections?: undefined;
         }
 
@@ -261,26 +251,6 @@ namespace ts {
             };
         }
 
-        function resetSectionalData(): void {
-            sourceMapData.sourceMapSources = [];
-            sourceMapData.sourceMapNames = [];
-            sourceMapData.sourceMapMappings = "";
-            sourceMapData.sourceMapSourcesContent = compilerOptions.inlineSources ? [] : undefined;
-        }
-
-        function generateMap(): SourceMap {
-            if (completedSections.length) {
-                captureSectionalSpanIfNeeded(/*reset*/ false);
-                return {
-                    version: 3,
-                    file: sourceMapData.sourceMapFile,
-                    sections: completedSections
-                };
-            }
-            else {
-                return captureSection();
-            }
-        }
 
         // Encoding for sourcemap span
         function encodeLastRecordedSourceMapSpan() {
@@ -288,6 +258,11 @@ namespace ts {
                 return;
             }
 
+            Debug.assert(lastRecordedSourceMapSpan.emittedColumn >= 0, "lastEncodedSourceMapSpan.emittedColumn was negative");
+            Debug.assert(lastRecordedSourceMapSpan.sourceIndex >= 0, "lastEncodedSourceMapSpan.sourceIndex was negative");
+            Debug.assert(lastRecordedSourceMapSpan.sourceLine >= 0, "lastEncodedSourceMapSpan.sourceLine was negative");
+            Debug.assert(lastRecordedSourceMapSpan.sourceColumn >= 0, "lastEncodedSourceMapSpan.sourceColumn was negative");
+
             let prevEncodedEmittedColumn = lastEncodedSourceMapSpan!.emittedColumn;
             // Line/Comma delimiters
             if (lastEncodedSourceMapSpan!.emittedLine === lastRecordedSourceMapSpan.emittedLine) {
@@ -301,7 +276,7 @@ namespace ts {
                 for (let encodedLine = lastEncodedSourceMapSpan!.emittedLine; encodedLine < lastRecordedSourceMapSpan.emittedLine; encodedLine++) {
                     sourceMapData.sourceMapMappings += ";";
                 }
-                prevEncodedEmittedColumn = 1;
+                prevEncodedEmittedColumn = 0;
             }
 
             // 1. Relative Column 0 based
@@ -346,12 +321,8 @@ namespace ts {
 
             const sourceLinePos = getLineAndCharacterOfPosition(currentSource, pos);
 
-            // Convert the location to be one-based.
-            sourceLinePos.line++;
-            sourceLinePos.character++;
-
-            const emittedLine = writer.getLine() - sectionStartLine + 1;
-            const emittedColumn = emittedLine === 0 ? (writer.getColumn() - sectionStartColumn + 1) : writer.getColumn();
+            const emittedLine = writer.getLine();
+            const emittedColumn = writer.getColumn();
 
             // If this location wasn't recorded or the location in source is going backwards, record the span
             if (!lastRecordedSourceMapSpan ||
@@ -386,13 +357,8 @@ namespace ts {
             }
         }
 
-        function captureSectionalSpanIfNeeded(reset: boolean) {
-            if (lastRecordedSourceMapSpan && lastRecordedSourceMapSpan === lastEncodedSourceMapSpan) { // If we've recorded some spans, save them
-                completedSections.push({ offset: { line: sectionStartLine - 1, column: sectionStartColumn - 1 }, map: captureSection() });
-                if (reset) {
-                    resetSectionalData();
-                }
-            }
+        function isPossiblySourceMap(x: {}): x is SourceMapSection {
+            return typeof x === "object" && !!(x as any).mappings && typeof (x as any).mappings === "string" && !!(x as any).sources;
         }
 
         /**
@@ -409,7 +375,6 @@ namespace ts {
 
             if (node) {
                 if (isUnparsedSource(node) && node.sourceMapText !== undefined) {
-                    captureSectionalSpanIfNeeded(/*reset*/ true);
                     const text = node.sourceMapText;
                     let parsed: {} | undefined;
                     try {
@@ -418,24 +383,41 @@ namespace ts {
                     catch {
                         // empty
                     }
-                    const offset = { line: writer.getLine() - 1, column: writer.getColumn() - 1 };
-                    completedSections.push(parsed
-                        ? {
-                            offset,
-                            map: parsed as SourceMap
-                        }
-                        : {
-                            offset,
-                            // This is just passes the buck on sourcemaps we don't really understand, instead of issuing an error (which would be difficult this late)
-                            url: `data:application/json;charset=utf-8;base64,${base64encode(sys, text)}`
-                        }
-                    );
-                    const emitResult = emitCallback(hint, node);
-                    sectionStartLine = writer.getLine();
-                    sectionStartColumn = writer.getColumn();
-                    lastRecordedSourceMapSpan = undefined!;
-                    lastEncodedSourceMapSpan = defaultLastEncodedSourceMapSpan;
-                    return emitResult;
+                    if (!parsed || !isPossiblySourceMap(parsed)) {
+                        return emitCallback(hint, node);
+                    }
+                    const offsetLine = writer.getLine();
+                    const firstLineColumnOffset = writer.getColumn();
+                    // First, decode the old component sourcemap
+                    const originalMap = parsed;
+                    sourcemaps.calculateDecodedMappings(originalMap, (raw): void => {
+                        // Apply offsets to each position and fixup source entries
+                        const rawPath = originalMap.sources[raw.sourceIndex];
+                        const relativePath = originalMap.sourceRoot ? combinePaths(originalMap.sourceRoot, rawPath) : rawPath;
+                        const combinedPath = combinePaths(getDirectoryPath(node.sourceMapPath!), relativePath);
+                        const sourcesDirectoryPath = compilerOptions.sourceRoot ? host.getCommonSourceDirectory() : sourceMapDir;
+                        const resolvedPath = getRelativePathToDirectoryOrUrl(
+                            sourcesDirectoryPath,
+                            combinedPath,
+                            host.getCurrentDirectory(),
+                            host.getCanonicalFileName,
+                            /*isAbsolutePathAnUrl*/ true
+                        );
+                        const absolutePath = getNormalizedAbsolutePath(resolvedPath, sourcesDirectoryPath);
+                        // tslint:disable-next-line:no-null-keyword
+                        setupSourceEntry(absolutePath, originalMap.sourcesContent ? originalMap.sourcesContent[raw.sourceIndex] : null); // TODO: Lookup content for inlining?
+                        const newIndex = sourceMapData.sourceMapSources.indexOf(resolvedPath);
+                        // Then reencode all the updated spans into the overall map
+                        encodeLastRecordedSourceMapSpan();
+                        lastRecordedSourceMapSpan = {
+                            ...raw,
+                            emittedLine: raw.emittedLine + offsetLine,
+                            emittedColumn: raw.emittedLine === 0 ? (raw.emittedColumn + firstLineColumnOffset) : raw.emittedColumn,
+                            sourceIndex: newIndex,
+                        };
+                    });
+                    // And actually emit the text these sourcemaps are for
+                    return emitCallback(hint, node);
                 }
                 const emitNode = node.emitNode;
                 const emitFlags = emitNode && emitNode.flags || EmitFlags.None;
@@ -529,13 +511,17 @@ namespace ts {
                 return;
             }
 
+            setupSourceEntry(sourceFile.fileName, sourceFile.text);
+        }
+
+        function setupSourceEntry(fileName: string, content: string | null) {
             // Add the file to tsFilePaths
             // If sourceroot option: Use the relative path corresponding to the common directory path
             // otherwise source locations relative to map file location
             const sourcesDirectoryPath = compilerOptions.sourceRoot ? host.getCommonSourceDirectory() : sourceMapDir;
 
             const source = getRelativePathToDirectoryOrUrl(sourcesDirectoryPath,
-                currentSource.fileName,
+                fileName,
                 host.getCurrentDirectory(),
                 host.getCanonicalFileName,
                 /*isAbsolutePathAnUrl*/ true);
@@ -546,10 +532,10 @@ namespace ts {
                 sourceMapData.sourceMapSources.push(source);
 
                 // The one that can be used from program to get the actual source file
-                sourceMapData.inputSourceFileNames.push(currentSource.fileName);
+                sourceMapData.inputSourceFileNames.push(fileName);
 
                 if (compilerOptions.inlineSources) {
-                    sourceMapData.sourceMapSourcesContent!.push(currentSource.text);
+                    sourceMapData.sourceMapSourcesContent!.push(content);
                 }
             }
         }
@@ -564,7 +550,7 @@ namespace ts {
 
             encodeLastRecordedSourceMapSpan();
 
-            return JSON.stringify(generateMap());
+            return JSON.stringify(captureSection());
         }
 
         /**
diff --git a/src/services/sourcemaps.ts b/src/compiler/sourcemapDecoder.ts
similarity index 77%
rename from src/services/sourcemaps.ts
rename to src/compiler/sourcemapDecoder.ts
index 4fae8167aace6..290f7699e5dfe 100644
--- a/src/services/sourcemaps.ts
+++ b/src/compiler/sourcemapDecoder.ts
@@ -1,3 +1,33 @@
+/* @internal */
+namespace ts {
+    export interface SourceFileLikeCache {
+        get(path: Path): SourceFileLike | undefined;
+    }
+
+    export function createSourceFileLikeCache(host: { readFile?: (path: string) => string | undefined, fileExists?: (path: string) => boolean }): SourceFileLikeCache {
+        const cached = createMap<SourceFileLike>();
+        return {
+            get(path: Path) {
+                if (cached.has(path)) {
+                    return cached.get(path);
+                }
+                if (!host.fileExists || !host.readFile || !host.fileExists(path)) return;
+                // And failing that, check the disk
+                const text = host.readFile(path)!; // TODO: GH#18217
+                const file = {
+                    text,
+                    lineMap: undefined,
+                    getLineAndCharacterOfPosition(pos: number) {
+                        return computeLineAndCharacterOfPosition(getLineStarts(this), pos);
+                    }
+                } as SourceFileLike;
+                cached.set(path, file);
+                return file;
+            }
+        };
+    }
+}
+
 /* @internal */
 namespace ts.sourcemaps {
     export interface SourceMapData {
@@ -5,7 +35,7 @@ namespace ts.sourcemaps {
         file?: string;
         sourceRoot?: string;
         sources: string[];
-        sourcesContent?: string[];
+        sourcesContent?: (string | null)[];
         names?: string[];
         mappings: string;
     }
@@ -86,7 +116,7 @@ namespace ts.sourcemaps {
         }
 
         function getDecodedMappings() {
-            return decodedMappings || (decodedMappings = calculateDecodedMappings());
+            return decodedMappings || (decodedMappings = calculateDecodedMappings(map, processPosition, host));
         }
 
         function getSourceOrderedMappings() {
@@ -97,30 +127,6 @@ namespace ts.sourcemaps {
             return generatedOrderedMappings || (generatedOrderedMappings = getDecodedMappings().slice().sort(compareProcessedPositionEmittedPositions));
         }
 
-        function calculateDecodedMappings(): ProcessedSourceMapPosition[] {
-            const state: DecoderState<ProcessedSourceMapPosition> = {
-                encodedText: map.mappings,
-                currentNameIndex: undefined,
-                sourceMapNamesLength: map.names ? map.names.length : undefined,
-                currentEmittedColumn: 0,
-                currentEmittedLine: 0,
-                currentSourceColumn: 0,
-                currentSourceLine: 0,
-                currentSourceIndex: 0,
-                positions: [],
-                decodingIndex: 0,
-                processPosition,
-            };
-            while (!hasCompletedDecoding(state)) {
-                decodeSinglePosition(state);
-                if (state.error) {
-                    host.log(`Encountered error while decoding sourcemap found at ${mapPath}: ${state.error}`);
-                    return [];
-                }
-            }
-            return state.positions;
-        }
-
         function compareProcessedPositionSourcePositions(a: ProcessedSourceMapPosition, b: ProcessedSourceMapPosition) {
             return comparePaths(a.sourcePath, b.sourcePath, sourceRoot) ||
                 compareValues(a.sourcePosition, b.sourcePosition);
@@ -142,6 +148,60 @@ namespace ts.sourcemaps {
         }
     }
 
+    /*@internal*/
+    export interface MappingsDecoder extends Iterator<SourceMapSpan> {
+        readonly decodingIndex: number;
+        readonly error: string | undefined;
+        readonly lastSpan: SourceMapSpan;
+    }
+
+    /*@internal*/
+    export function decodeMappings(map: SourceMapData): MappingsDecoder {
+        const state: DecoderState = {
+            encodedText: map.mappings,
+            currentNameIndex: undefined,
+            sourceMapNamesLength: map.names ? map.names.length : undefined,
+            currentEmittedColumn: 0,
+            currentEmittedLine: 0,
+            currentSourceColumn: 0,
+            currentSourceLine: 0,
+            currentSourceIndex: 0,
+            decodingIndex: 0
+        };
+        function captureSpan(): SourceMapSpan {
+            return {
+                emittedColumn: state.currentEmittedColumn,
+                emittedLine: state.currentEmittedLine,
+                sourceColumn: state.currentSourceColumn,
+                sourceIndex: state.currentSourceIndex,
+                sourceLine: state.currentSourceLine,
+                nameIndex: state.currentNameIndex
+            };
+        }
+        return {
+            get decodingIndex() { return state.decodingIndex; },
+            get error() { return state.error; },
+            get lastSpan() { return captureSpan(); },
+            next() {
+                if (hasCompletedDecoding(state) || state.error) return { done: true, value: undefined as never };
+                if (!decodeSinglePosition(state)) return { done: true, value: undefined as never };
+                return { done: false, value: captureSpan() };
+            }
+        };
+    }
+
+    export function calculateDecodedMappings<T>(map: SourceMapData, processPosition: (position: RawSourceMapPosition) => T, host?: { log?(s: string): void }): T[] {
+        const decoder = decodeMappings(map);
+        const positions = arrayFrom(decoder, processPosition);
+        if (decoder.error) {
+            if (host && host.log) {
+                host.log(`Encountered error while decoding sourcemap: ${decoder.error}`);
+            }
+            return [];
+        }
+        return positions;
+    }
+
     interface ProcessedSourceMapPosition {
         emittedPosition: number;
         sourcePosition: number;
@@ -157,7 +217,7 @@ namespace ts.sourcemaps {
         nameIndex?: number;
     }
 
-    interface DecoderState<T> {
+    interface DecoderState {
         decodingIndex: number;
         currentEmittedLine: number;
         currentEmittedColumn: number;
@@ -168,15 +228,13 @@ namespace ts.sourcemaps {
         encodedText: string;
         sourceMapNamesLength?: number;
         error?: string;
-        positions: T[];
-        processPosition: (position: RawSourceMapPosition) => T;
     }
 
-    function hasCompletedDecoding(state: DecoderState<any>) {
+    function hasCompletedDecoding(state: DecoderState) {
         return state.decodingIndex === state.encodedText.length;
     }
 
-    function decodeSinglePosition<T>(state: DecoderState<T>): void {
+    function decodeSinglePosition(state: DecoderState): boolean {
         while (state.decodingIndex < state.encodedText.length) {
             const char = state.encodedText.charCodeAt(state.decodingIndex);
             if (char === CharacterCodes.semicolon) {
@@ -198,40 +256,40 @@ namespace ts.sourcemaps {
             state.currentEmittedColumn += base64VLQFormatDecode();
             // Incorrect emittedColumn dont support this map
             if (createErrorIfCondition(state.currentEmittedColumn < 0, "Invalid emittedColumn found")) {
-                return;
+                return false;
             }
             // Dont support reading mappings that dont have information about original source and its line numbers
             if (createErrorIfCondition(isSourceMappingSegmentEnd(state.encodedText, state.decodingIndex), "Unsupported Error Format: No entries after emitted column")) {
-                return;
+                return false;
             }
 
             // 2. Relative sourceIndex
             state.currentSourceIndex += base64VLQFormatDecode();
             // Incorrect sourceIndex dont support this map
             if (createErrorIfCondition(state.currentSourceIndex < 0, "Invalid sourceIndex found")) {
-                return;
+                return false;
             }
             // Dont support reading mappings that dont have information about original source position
             if (createErrorIfCondition(isSourceMappingSegmentEnd(state.encodedText, state.decodingIndex), "Unsupported Error Format: No entries after sourceIndex")) {
-                return;
+                return false;
             }
 
             // 3. Relative sourceLine 0 based
             state.currentSourceLine += base64VLQFormatDecode();
             // Incorrect sourceLine dont support this map
             if (createErrorIfCondition(state.currentSourceLine < 0, "Invalid sourceLine found")) {
-                return;
+                return false;
             }
             // Dont support reading mappings that dont have information about original source and its line numbers
             if (createErrorIfCondition(isSourceMappingSegmentEnd(state.encodedText, state.decodingIndex), "Unsupported Error Format: No entries after emitted Line")) {
-                return;
+                return false;
             }
 
             // 4. Relative sourceColumn 0 based
             state.currentSourceColumn += base64VLQFormatDecode();
             // Incorrect sourceColumn dont support this map
             if (createErrorIfCondition(state.currentSourceColumn < 0, "Invalid sourceLine found")) {
-                return;
+                return false;
             }
             // 5. Check if there is name:
             if (!isSourceMappingSegmentEnd(state.encodedText, state.decodingIndex)) {
@@ -247,27 +305,15 @@ namespace ts.sourcemaps {
             }
             // Dont support reading mappings that dont have information about original source and its line numbers
             if (createErrorIfCondition(!isSourceMappingSegmentEnd(state.encodedText, state.decodingIndex), "Unsupported Error Format: There are more entries after " + (state.currentNameIndex === undefined ? "sourceColumn" : "nameIndex"))) {
-                return;
+                return false;
             }
 
             // Entry should be complete
-            capturePosition();
-            return;
+            return true;
         }
 
         createErrorIfCondition(/*condition*/ true, "No encoded entry found");
-        return;
-
-        function capturePosition() {
-            state.positions.push(state.processPosition({
-                emittedColumn: state.currentEmittedColumn,
-                emittedLine: state.currentEmittedLine,
-                sourceColumn: state.currentSourceColumn,
-                sourceIndex: state.currentSourceIndex,
-                sourceLine: state.currentSourceLine,
-                nameIndex: state.currentNameIndex
-            }));
-        }
+        return false;
 
         function createErrorIfCondition(condition: boolean, errormsg: string) {
             if (state.error) {
diff --git a/src/parser/sys.ts b/src/compiler/sys.ts
similarity index 100%
rename from src/parser/sys.ts
rename to src/compiler/sys.ts
diff --git a/src/compiler/transformers/declarations.ts b/src/compiler/transformers/declarations.ts
index 38ddd0067f0b3..8e2e3727c60b0 100644
--- a/src/compiler/transformers/declarations.ts
+++ b/src/compiler/transformers/declarations.ts
@@ -180,7 +180,7 @@ namespace ts {
                     }
                 ), mapDefined(node.prepends, prepend => {
                     if (prepend.kind === SyntaxKind.InputFiles) {
-                        return createUnparsedSourceFile(prepend.declarationText, prepend.declarationMapText);
+                        return createUnparsedSourceFile(prepend.declarationText, prepend.declarationMapPath, prepend.declarationMapText);
                     }
                 }));
                 bundle.syntheticFileReferences = [];
diff --git a/src/compiler/transformers/ts.ts b/src/compiler/transformers/ts.ts
index 1cb2942a51941..8f6f1832746a8 100644
--- a/src/compiler/transformers/ts.ts
+++ b/src/compiler/transformers/ts.ts
@@ -100,7 +100,7 @@ namespace ts {
         function transformBundle(node: Bundle) {
             return createBundle(node.sourceFiles.map(transformSourceFile), mapDefined(node.prepends, prepend => {
                 if (prepend.kind === SyntaxKind.InputFiles) {
-                    return createUnparsedSourceFile(prepend.javascriptText, prepend.javascriptMapText);
+                    return createUnparsedSourceFile(prepend.javascriptText, prepend.javascriptMapPath, prepend.javascriptMapText);
                 }
                 return prepend;
             }));
diff --git a/src/compiler/tsbuild.ts b/src/compiler/tsbuild.ts
index 79306cc5d0698..80f6d1c1cc8ef 100644
--- a/src/compiler/tsbuild.ts
+++ b/src/compiler/tsbuild.ts
@@ -245,7 +245,7 @@ namespace ts {
         }
     }
 
-    export function createDependencyMapper() {
+    function createDependencyMapper() {
         const childToParents = createFileMap<ResolvedConfigFileName[]>();
         const parentToChildren = createFileMap<ResolvedConfigFileName[]>();
         const allKeys = createFileMap<true>();
@@ -422,7 +422,7 @@ namespace ts {
         }
     ];
 
-    export function performBuild(args: string[], compilerHost: CompilerHost, buildHost: BuildHost, system?: System) {
+    export function performBuild(args: string[], compilerHost: CompilerHost, buildHost: BuildHost, system?: System): number | undefined {
         let verbose = false;
         let dry = false;
         let force = false;
@@ -455,7 +455,8 @@ namespace ts {
                 case "--?":
                 case "-?":
                 case "--help":
-                    return printHelp(buildOpts, "--build ");
+                    printHelp(buildOpts, "--build ");
+                    return ExitStatus.Success;
             }
             // Not a flag, parse as filename
             addProject(arg);
@@ -463,16 +464,20 @@ namespace ts {
 
         // Nonsensical combinations
         if (clean && force) {
-            return buildHost.error(Diagnostics.Options_0_and_1_cannot_be_combined, "clean", "force");
+            buildHost.error(Diagnostics.Options_0_and_1_cannot_be_combined, "clean", "force");
+            return ExitStatus.DiagnosticsPresent_OutputsSkipped;
         }
         if (clean && verbose) {
-            return buildHost.error(Diagnostics.Options_0_and_1_cannot_be_combined, "clean", "verbose");
+            buildHost.error(Diagnostics.Options_0_and_1_cannot_be_combined, "clean", "verbose");
+            return ExitStatus.DiagnosticsPresent_OutputsSkipped;
         }
         if (clean && watch) {
-            return buildHost.error(Diagnostics.Options_0_and_1_cannot_be_combined, "clean", "watch");
+            buildHost.error(Diagnostics.Options_0_and_1_cannot_be_combined, "clean", "watch");
+            return ExitStatus.DiagnosticsPresent_OutputsSkipped;
         }
         if (watch && dry) {
-            return buildHost.error(Diagnostics.Options_0_and_1_cannot_be_combined, "watch", "dry");
+            buildHost.error(Diagnostics.Options_0_and_1_cannot_be_combined, "watch", "dry");
+            return ExitStatus.DiagnosticsPresent_OutputsSkipped;
         }
 
         if (projects.length === 0) {
@@ -482,16 +487,16 @@ namespace ts {
 
         const builder = createSolutionBuilder(compilerHost, buildHost, projects, { dry, force, verbose }, system);
         if (clean) {
-            builder.cleanAllProjects();
-        }
-        else {
-            builder.buildAllProjects();
+            return builder.cleanAllProjects();
         }
 
         if (watch) {
-            return builder.startWatching();
+            builder.startWatching();
+            return undefined;
         }
 
+        return builder.buildAllProjects();
+
         function addProject(projectSpecification: string) {
             const fileName = resolvePath(compilerHost.getCurrentDirectory(), projectSpecification);
             const refPath = resolveProjectReferencePath(compilerHost, { path: fileName });
@@ -503,7 +508,6 @@ namespace ts {
                 return buildHost.error(Diagnostics.File_0_does_not_exist, fileName);
             }
             projects.push(refPath);
-
         }
     }
 
@@ -637,7 +641,6 @@ namespace ts {
 
             // Mark all downstream projects of this one needing to be built "later"
             function queueBuildForDownstreamReferences(root: ResolvedConfigFileName) {
-                debugger;
                 const deps = graph.dependencyMap.getReferencesTo(root);
                 for (const ref of deps) {
                     // Can skip circular references
@@ -773,8 +776,10 @@ namespace ts {
             }
 
             let pseudoUpToDate = false;
+            let usesPrepend = false;
             if (project.projectReferences) {
                 for (const ref of project.projectReferences) {
+                    usesPrepend = usesPrepend || !!(ref.prepend);
                     const resolvedRef = resolveProjectReferencePath(compilerHost, ref) as ResolvedConfigFileName;
                     const refStatus = getUpToDateStatus(configFileCache.parseConfigFile(resolvedRef));
 
@@ -832,6 +837,10 @@ namespace ts {
                 };
             }
 
+            if (usesPrepend) {
+                pseudoUpToDate = false;
+            }
+
             // Up to date
             return {
                 type: pseudoUpToDate ? UpToDateStatusType.UpToDateWithUpstreamTypes : UpToDateStatusType.UpToDate,
@@ -1048,16 +1057,19 @@ namespace ts {
         function cleanAllProjects() {
             const resolvedNames: ReadonlyArray<ResolvedConfigFileName> | undefined = getAllProjectsInScope();
             if (resolvedNames === undefined) {
-                return buildHost.message(Diagnostics.Skipping_clean_because_not_all_projects_could_be_located);
+                buildHost.message(Diagnostics.Skipping_clean_because_not_all_projects_could_be_located);
+                return ExitStatus.DiagnosticsPresent_OutputsSkipped;
             }
 
             const filesToDelete = getFilesToClean(resolvedNames);
             if (filesToDelete === undefined) {
-                return buildHost.message(Diagnostics.Skipping_clean_because_not_all_projects_could_be_located);
+                buildHost.message(Diagnostics.Skipping_clean_because_not_all_projects_could_be_located);
+                return ExitStatus.DiagnosticsPresent_OutputsSkipped;
             }
 
             if (context.options.dry) {
-                return buildHost.message(Diagnostics.A_non_dry_build_would_delete_the_following_files_Colon_0, filesToDelete.map(f => `\r\n * ${f}`).join(""));
+                buildHost.message(Diagnostics.A_non_dry_build_would_delete_the_following_files_Colon_0, filesToDelete.map(f => `\r\n * ${f}`).join(""));
+                return ExitStatus.Success;
             }
 
             // Do this check later to allow --clean --dry to function even if the host can't delete files
@@ -1068,6 +1080,8 @@ namespace ts {
             for (const output of filesToDelete) {
                 compilerHost.deleteFile(output);
             }
+
+            return ExitStatus.Success;
         }
 
         function resolveProjectName(name: string): ResolvedConfigFileName | undefined {
@@ -1095,16 +1109,18 @@ namespace ts {
             return resolvedNames;
         }
 
-        function buildAllProjects() {
+        function buildAllProjects(): ExitStatus {
             const graph = getGlobalDependencyGraph();
-            if (graph === undefined) return;
+            if (graph === undefined) return ExitStatus.DiagnosticsPresent_OutputsSkipped;
 
             const queue = graph.buildQueue;
             reportBuildQueue(graph);
 
+            let anyFailed = false;
             for (const next of queue) {
                 const proj = configFileCache.parseConfigFile(next);
                 if (proj === undefined) {
+                    anyFailed = true;
                     break;
                 }
                 const status = getUpToDateStatus(proj);
@@ -1136,8 +1152,10 @@ namespace ts {
                     continue;
                 }
 
-                buildSingleProject(next);
+                const buildResult = buildSingleProject(next);
+                anyFailed = anyFailed || !!(buildResult & BuildResultFlags.AnyErrors);
             }
+            return anyFailed ? ExitStatus.DiagnosticsPresent_OutputsSkipped : ExitStatus.Success;
         }
 
         /**
diff --git a/src/compiler/tsconfig.json b/src/compiler/tsconfig.json
index 718de7e257a49..20b97c1b7784a 100644
--- a/src/compiler/tsconfig.json
+++ b/src/compiler/tsconfig.json
@@ -3,12 +3,28 @@
     "compilerOptions": {
         "outFile": "../../built/local/compiler.js"
     },
+
+    "references": [],
+
     "files": [
+        "core.ts",
+        "performance.ts",
+
+        "types.ts",
+        "sys.ts",
+        "diagnosticInformationMap.generated.ts",
+        "scanner.ts",
+        "utilities.ts",
+        "parser.ts",
+        "commandLineParser.ts",
+        "moduleNameResolver.ts",
+
         "binder.ts",
         "symbolWalker.ts",
         "checker.ts",
         "factory.ts",
         "visitor.ts",
+        "sourcemapDecoder.ts",
         "transformers/utilities.ts",
         "transformers/destructuring.ts",
         "transformers/ts.ts",
@@ -36,9 +52,5 @@
         "moduleSpecifiers.ts",
         "watch.ts",
         "tsbuild.ts"
-    ],
-    "references": [
-        { "path": "../core" },
-        { "path": "../parser" }
     ]
 }
diff --git a/src/compiler/tsconfig.release.json b/src/compiler/tsconfig.release.json
new file mode 100644
index 0000000000000..39ffc7913930c
--- /dev/null
+++ b/src/compiler/tsconfig.release.json
@@ -0,0 +1,8 @@
+{
+    "extends": "./tsconfig.json",
+    "compilerOptions": {
+        "outFile": "../../built/local/compiler.release.js",
+        "removeComments": true,
+        "preserveConstEnums": false
+    }
+}
diff --git a/src/parser/types.ts b/src/compiler/types.ts
similarity index 97%
rename from src/parser/types.ts
rename to src/compiler/types.ts
index bae03d391ed54..a9350bbebd79f 100644
--- a/src/parser/types.ts
+++ b/src/compiler/types.ts
@@ -374,6 +374,7 @@ namespace ts {
         JSDocCallbackTag,
         JSDocParameterTag,
         JSDocReturnTag,
+        JSDocThisTag,
         JSDocTypeTag,
         JSDocTemplateTag,
         JSDocTypedefTag,
@@ -2341,6 +2342,11 @@ namespace ts {
         kind: SyntaxKind.JSDocClassTag;
     }
 
+    export interface JSDocThisTag extends JSDocTag {
+        kind: SyntaxKind.JSDocThisTag;
+        typeExpression?: JSDocTypeExpression;
+    }
+
     export interface JSDocTemplateTag extends JSDocTag {
         kind: SyntaxKind.JSDocTemplateTag;
         typeParameters: NodeArray<TypeParameterDeclaration>;
@@ -2627,14 +2633,17 @@ namespace ts {
     export interface InputFiles extends Node {
         kind: SyntaxKind.InputFiles;
         javascriptText: string;
+        javascriptMapPath?: string;
         javascriptMapText?: string;
         declarationText: string;
+        declarationMapPath?: string;
         declarationMapText?: string;
     }
 
     export interface UnparsedSource extends Node {
         kind: SyntaxKind.UnparsedSource;
         text: string;
+        sourceMapPath?: string;
         sourceMapText?: string;
     }
 
@@ -2819,7 +2828,7 @@ namespace ts {
         sourceMapFile: string;               // Source map's file field - .js file name
         sourceMapSourceRoot: string;         // Source map's sourceRoot field - location where the sources will be present if not ""
         sourceMapSources: string[];          // Source map's sources field - list of sources that can be indexed in this source map
-        sourceMapSourcesContent?: string[];  // Source map's sourcesContent field - list of the sources' text to be embedded in the source map
+        sourceMapSourcesContent?: (string | null)[];  // Source map's sourcesContent field - list of the sources' text to be embedded in the source map
         inputSourceFileNames: string[];      // Input source file (which one can use on program to get the file), 1:1 mapping with the sourceMapSources list
         sourceMapNames?: string[];           // Source map's names field - list of names that can be indexed in this source map
         sourceMapMappings: string;           // Source map's mapping field - encoded source map spans
@@ -3864,6 +3873,10 @@ namespace ts {
         associatedNames?: __String[];
     }
 
+    export interface TupleTypeReference extends TypeReference {
+        target: TupleType;
+    }
+
     export interface UnionOrIntersectionType extends Type {
         types: Type[];                    // Constituent types
         /* @internal */
@@ -4209,16 +4222,19 @@ namespace ts {
         next?: DiagnosticMessageChain;
     }
 
-    export interface Diagnostic {
-        file: SourceFile | undefined;
-        start: number | undefined;
-        length: number | undefined;
-        messageText: string | DiagnosticMessageChain;
+    export interface Diagnostic extends DiagnosticRelatedInformation {
         category: DiagnosticCategory;
         /** May store more in future. For now, this will simply be `true` to indicate when a diagnostic is an unused-identifier diagnostic. */
         reportsUnnecessary?: {};
         code: number;
         source?: string;
+        relatedInformation?: DiagnosticRelatedInformation[];
+    }
+    export interface DiagnosticRelatedInformation {
+        file: SourceFile | undefined;
+        start: number | undefined;
+        length: number | undefined;
+        messageText: string | DiagnosticMessageChain;
     }
     export interface DiagnosticWithLocation extends Diagnostic {
         file: SourceFile;
@@ -5280,6 +5296,7 @@ namespace ts {
         useCaseSensitiveFileNames?(): boolean;
         fileExists?(path: string): boolean;
         readFile?(path: string): string | undefined;
+        getSourceFiles?(): ReadonlyArray<SourceFile>; // Used for cached resolutions to find symlinks without traversing the fs (again)
     }
 
     /** @deprecated See comment on SymbolWriter */
diff --git a/src/parser/utilities.ts b/src/compiler/utilities.ts
similarity index 97%
rename from src/parser/utilities.ts
rename to src/compiler/utilities.ts
index f04f5f01bd706..49769953f029e 100644
--- a/src/parser/utilities.ts
+++ b/src/compiler/utilities.ts
@@ -1,10 +1,5 @@
 /** Non-internal stuff goes here */
 namespace ts {
-    export const emptyArray: never[] = [] as never[];
-    export function closeFileWatcher(watcher: FileWatcher) {
-        watcher.close();
-    }
-
     export function isExternalModuleNameRelative(moduleName: string): boolean {
         // TypeScript 1.0 spec (April 2014): 11.2.1
         // An external module name is "relative" if the first term is "." or "..".
@@ -15,21 +10,11 @@ namespace ts {
     export function sortAndDeduplicateDiagnostics<T extends Diagnostic>(diagnostics: ReadonlyArray<T>): T[] {
         return sortAndDeduplicate<T>(diagnostics, compareDiagnostics);
     }
-
-    export function toPath(fileName: string, basePath: string | undefined, getCanonicalFileName: (path: string) => string): Path {
-        const nonCanonicalizedPath = isRootedDiskPath(fileName)
-            ? normalizePath(fileName)
-            : getNormalizedAbsolutePath(fileName, basePath);
-        return <Path>getCanonicalFileName(nonCanonicalizedPath);
-    }
-
-    export function hasEntries(map: ReadonlyUnderscoreEscapedMap<any> | undefined): map is ReadonlyUnderscoreEscapedMap<any> {
-        return !!map && !!map.size;
-    }
 }
 
 /* @internal */
 namespace ts {
+    export const emptyArray: never[] = [] as never[];
     export const resolvingEmptyArray: never[] = [] as never[];
     export const emptyMap: ReadonlyMap<never> = createMap<never>();
     export const emptyUnderscoreEscapedMap: ReadonlyUnderscoreEscapedMap<never> = emptyMap as ReadonlyUnderscoreEscapedMap<never>;
@@ -54,6 +39,10 @@ namespace ts {
         return new MapCtr<T>() as UnderscoreEscapedMap<T>;
     }
 
+    export function hasEntries(map: ReadonlyUnderscoreEscapedMap<any> | undefined): map is ReadonlyUnderscoreEscapedMap<any> {
+        return !!map && !!map.size;
+    }
+
     export function createSymbolTable(symbols?: ReadonlyArray<Symbol>): SymbolTable {
         const result = createMap<Symbol>() as SymbolTable;
         if (symbols) {
@@ -103,6 +92,13 @@ namespace ts {
         };
     }
 
+    export function toPath(fileName: string, basePath: string | undefined, getCanonicalFileName: (path: string) => string): Path {
+        const nonCanonicalizedPath = isRootedDiskPath(fileName)
+            ? normalizePath(fileName)
+            : getNormalizedAbsolutePath(fileName, basePath);
+        return <Path>getCanonicalFileName(nonCanonicalizedPath);
+    }
+
     export function changesAffectModuleResolution(oldOptions: CompilerOptions, newOptions: CompilerOptions): boolean {
         return !oldOptions ||
             (oldOptions.module !== newOptions.module) ||
@@ -799,7 +795,7 @@ namespace ts {
         return createFileDiagnostic(sourceFile, span.start, span.length, message, arg0, arg1, arg2, arg3);
     }
 
-    export function createDiagnosticForNodeFromMessageChain(node: Node, messageChain: DiagnosticMessageChain): DiagnosticWithLocation {
+    export function createDiagnosticForNodeFromMessageChain(node: Node, messageChain: DiagnosticMessageChain, relatedInformation?: DiagnosticRelatedInformation[]): DiagnosticWithLocation {
         const sourceFile = getSourceFileOfNode(node);
         const span = getErrorSpanForNode(sourceFile, node);
         return {
@@ -808,7 +804,8 @@ namespace ts {
             length: span.length,
             code: messageChain.code,
             category: messageChain.category,
-            messageText: messageChain.next ? messageChain : messageChain.messageText
+            messageText: messageChain.next ? messageChain : messageChain.messageText,
+            relatedInformation
         };
     }
 
@@ -1761,6 +1758,12 @@ namespace ts {
         return node.initializer;
     }
 
+    /** Get the declaration initializer when it is container-like (See getJavascriptInitializer). */
+    export function getDeclaredJavascriptInitializer(node: HasExpressionInitializer) {
+        const init = getEffectiveInitializer(node);
+        return init && getJavascriptInitializer(init, isPrototypeAccess(node.name));
+    }
+
     /**
      * Get the assignment 'initializer' -- the righthand side-- when the initializer is container-like (See getJavascriptInitializer).
      * We treat the right hand side of assignments with container-like initalizers as declarations.
@@ -2091,7 +2094,12 @@ namespace ts {
             if (isBinaryExpression(node) && node.operatorToken.kind === SyntaxKind.EqualsToken ||
                 isBinaryExpression(parent) && parent.operatorToken.kind === SyntaxKind.EqualsToken ||
                 node.kind === SyntaxKind.PropertyAccessExpression && node.parent && node.parent.kind === SyntaxKind.ExpressionStatement) {
-                getJSDocCommentsAndTagsWorker(parent);
+                if (isBinaryExpression(parent)) {
+                    getJSDocCommentsAndTagsWorker(parent.parent);
+                }
+                else {
+                    getJSDocCommentsAndTagsWorker(parent);
+                }
             }
 
             // Pull parameter comments from declaring function as well
@@ -2713,7 +2721,7 @@ namespace ts {
         return getOperatorPrecedence(expression.kind, operator, hasArguments);
     }
 
-    export function getOperator(expression: Expression) {
+    export function getOperator(expression: Expression): SyntaxKind {
         if (expression.kind === SyntaxKind.BinaryExpression) {
             return (<BinaryExpression>expression).operatorToken.kind;
         }
@@ -3080,8 +3088,8 @@ namespace ts {
             decreaseIndent: () => { indent--; },
             getIndent: () => indent,
             getTextPos: () => output.length,
-            getLine: () => lineCount + 1,
-            getColumn: () => lineStart ? indent * getIndentSize() + 1 : output.length - linePos + 1,
+            getLine: () => lineCount,
+            getColumn: () => lineStart ? indent * getIndentSize() : output.length - linePos,
             getText: () => output,
             isAtStartOfLine: () => lineStart,
             clear: reset,
@@ -4089,6 +4097,10 @@ namespace ts {
         return options.watch && options.hasOwnProperty("watch");
     }
 
+    export function closeFileWatcher(watcher: FileWatcher) {
+        watcher.close();
+    }
+
     export function getCheckFlags(symbol: Symbol): CheckFlags {
         return symbol.flags & SymbolFlags.Transient ? (<TransientSymbol>symbol).checkFlags : 0;
     }
@@ -4964,6 +4976,11 @@ namespace ts {
         return getFirstJSDocTag(node, isJSDocClassTag);
     }
 
+    /** Gets the JSDoc this tag for the node if present */
+    export function getJSDocThisTag(node: Node): JSDocThisTag | undefined {
+        return getFirstJSDocTag(node, isJSDocThisTag);
+    }
+
     /** Gets the JSDoc return tag for the node if present */
     export function getJSDocReturnTag(node: Node): JSDocReturnTag | undefined {
         return getFirstJSDocTag(node, isJSDocReturnTag);
@@ -5695,6 +5712,10 @@ namespace ts {
         return node.kind === SyntaxKind.JSDocClassTag;
     }
 
+    export function isJSDocThisTag(node: Node): node is JSDocThisTag {
+        return node.kind === SyntaxKind.JSDocThisTag;
+    }
+
     export function isJSDocParameterTag(node: Node): node is JSDocParameterTag {
         return node.kind === SyntaxKind.JSDocParameterTag;
     }
@@ -6649,7 +6670,11 @@ namespace ts {
     export function isStringLiteralLike(node: Node): node is StringLiteralLike {
         return node.kind === SyntaxKind.StringLiteral || node.kind === SyntaxKind.NoSubstitutionTemplateLiteral;
     }
+}
+
 
+/* @internal */
+namespace ts {
     /** @internal */
     export function isNamedImportsOrExports(node: Node): node is NamedImportsOrExports {
         return node.kind === SyntaxKind.NamedImports || node.kind === SyntaxKind.NamedExports;
@@ -6714,6 +6739,7 @@ namespace ts {
         getSourceMapSourceConstructor: () => <any>SourceMapSource,
     };
 
+    /* @internal */
     export function formatStringFromArgs(text: string, args: ArrayLike<string>, baseIndex = 0): string {
         return text.replace(/{(\d+)}/g, (_match, index: string) => Debug.assertDefined(args[+index + baseIndex]));
     }
@@ -6724,6 +6750,7 @@ namespace ts {
         return localizedDiagnosticMessages && localizedDiagnosticMessages[message.key] || message.message;
     }
 
+    /* @internal */
     export function createFileDiagnostic(file: SourceFile, start: number, length: number, message: DiagnosticMessage, ...args: (string | number | undefined)[]): DiagnosticWithLocation;
     export function createFileDiagnostic(file: SourceFile, start: number, length: number, message: DiagnosticMessage): DiagnosticWithLocation {
         Debug.assertGreaterThanOrEqual(start, 0);
@@ -6763,6 +6790,7 @@ namespace ts {
         return text;
     }
 
+    /* @internal */
     export function createCompilerDiagnostic(message: DiagnosticMessage, ...args: (string | number | undefined)[]): Diagnostic;
     export function createCompilerDiagnostic(message: DiagnosticMessage): Diagnostic {
         let text = getLocaleSpecificMessage(message);
@@ -6783,6 +6811,7 @@ namespace ts {
         };
     }
 
+    /* @internal */
     export function createCompilerDiagnosticFromMessageChain(chain: DiagnosticMessageChain): Diagnostic {
         return {
             file: undefined,
@@ -6795,6 +6824,7 @@ namespace ts {
         };
     }
 
+    /* @internal */
     export function chainDiagnosticMessages(details: DiagnosticMessageChain | undefined, message: DiagnosticMessage, ...args: (string | undefined)[]): DiagnosticMessageChain;
     export function chainDiagnosticMessages(details: DiagnosticMessageChain | undefined, message: DiagnosticMessage): DiagnosticMessageChain {
         let text = getLocaleSpecificMessage(message);
@@ -6826,6 +6856,7 @@ namespace ts {
         return diagnostic.file ? diagnostic.file.path : undefined;
     }
 
+    /* @internal */
     export function compareDiagnostics(d1: Diagnostic, d2: Diagnostic): Comparison {
         return compareStringsCaseSensitive(getDiagnosticFilePath(d1), getDiagnosticFilePath(d2)) ||
             compareValues(d1.start, d2.start) ||
@@ -7124,6 +7155,7 @@ namespace ts {
         return rootLength > 0 && rootLength === path.length;
     }
 
+    /* @internal */
     export function convertToRelativePath(absoluteOrRelativePath: string, basePath: string, getCanonicalFileName: (path: string) => string): string {
         return !isRootedDiskPath(absoluteOrRelativePath)
             ? absoluteOrRelativePath
@@ -7201,7 +7233,11 @@ namespace ts {
         return root + pathComponents.slice(1).join(directorySeparator);
     }
 
-    function getPathComponentsRelativeTo(from: string, to: string, stringEqualityComparer: (a: string, b: string) => boolean, getCanonicalFileName: GetCanonicalFileName) {
+}
+
+/* @internal */
+namespace ts {
+    export function getPathComponentsRelativeTo(from: string, to: string, stringEqualityComparer: (a: string, b: string) => boolean, getCanonicalFileName: GetCanonicalFileName) {
         const fromComponents = reducePathComponents(getPathComponents(from));
         const toComponents = reducePathComponents(getPathComponents(to));
 
@@ -7980,7 +8016,7 @@ namespace ts {
     }
 
     export function tryGetExtensionFromPath(path: string): Extension | undefined {
-        return find<Extension>(supportedTypescriptExtensionsForExtractExtension, e => fileExtensionIs(path, e)) || find(supportedJavascriptExtensions, e => fileExtensionIs(path, e));
+        return find<Extension>(extensionsToRemove, e => fileExtensionIs(path, e));
     }
 
     function getAnyExtensionFromPathWorker(path: string, extensions: string | ReadonlyArray<string>, stringEqualityComparer: (a: string, b: string) => boolean) {
@@ -8048,4 +8084,5 @@ namespace ts {
         }
 
         return findBestPatternMatch(patterns, _ => _, candidate);
-    }}
+    }
+}
diff --git a/src/core/tsconfig.json b/src/core/tsconfig.json
deleted file mode 100644
index 087aeb81a3a25..0000000000000
--- a/src/core/tsconfig.json
+++ /dev/null
@@ -1,11 +0,0 @@
-{
-    "extends": "../tsconfig-base",
-    "compilerOptions": {
-        "outFile": "../../built/local/core.js"
-    },
-    "files": [
-        "performance.ts",
-        "core.ts"
-    ],
-    "references": [ ]
-}
diff --git a/src/harness/fourslash.ts b/src/harness/fourslash.ts
index 8045f3a948baf..0ca37715b9f17 100644
--- a/src/harness/fourslash.ts
+++ b/src/harness/fourslash.ts
@@ -507,8 +507,17 @@ namespace FourSlash {
         }
 
         private getAllDiagnostics(): ts.Diagnostic[] {
-            return ts.flatMap(this.languageServiceAdapterHost.getFilenames(), fileName =>
-                ts.isAnySupportedFileExtension(fileName) ? this.getDiagnostics(fileName) : []);
+            return ts.flatMap(this.languageServiceAdapterHost.getFilenames(), fileName => {
+                if (!ts.isAnySupportedFileExtension(fileName)) {
+                    return [];
+                }
+
+                const baseName = ts.getBaseFileName(fileName);
+                if (baseName === "package.json" || baseName === "tsconfig.json" || baseName === "jsconfig.json") {
+                    return [];
+                }
+                return this.getDiagnostics(fileName);
+            });
         }
 
         public verifyErrorExistsAfterMarker(markerName: string, shouldExist: boolean, after: boolean) {
diff --git a/src/harness/harness.ts b/src/harness/harness.ts
index 7a3019d9b36b6..0b72834e1c2b6 100644
--- a/src/harness/harness.ts
+++ b/src/harness/harness.ts
@@ -1108,6 +1108,7 @@ namespace Harness {
             { name: "noImplicitReferences", type: "boolean" },
             { name: "currentDirectory", type: "string" },
             { name: "symlink", type: "string" },
+            { name: "link", type: "string" },
             // Emitted js baseline will print full paths for every output file
             { name: "fullEmitPaths", type: "boolean" }
         ];
@@ -1179,7 +1180,9 @@ namespace Harness {
             harnessSettings: TestCaseParser.CompilerSettings | undefined,
             compilerOptions: ts.CompilerOptions | undefined,
             // Current directory is needed for rwcRunner to be able to use currentDirectory defined in json file
-            currentDirectory: string | undefined): compiler.CompilationResult {
+            currentDirectory: string | undefined,
+            symlinks?: vfs.FileSet
+        ): compiler.CompilationResult {
             const options: ts.CompilerOptions & HarnessOptions = compilerOptions ? ts.cloneCompilerOptions(compilerOptions) : { noResolve: false };
             options.target = options.target || ts.ScriptTarget.ES3;
             options.newLine = options.newLine || ts.NewLineKind.CarriageReturnLineFeed;
@@ -1216,6 +1219,9 @@ namespace Harness {
 
             const docs = inputFiles.concat(otherFiles).map(documents.TextDocument.fromTestFile);
             const fs = vfs.createFromFileSystem(IO, !useCaseSensitiveFileNames, { documents: docs, cwd: currentDirectory });
+            if (symlinks) {
+                fs.apply(symlinks);
+            }
             const host = new fakes.CompilerHost(fs, options);
             return compiler.compileFiles(host, programFileNames, options);
         }
@@ -1836,6 +1842,7 @@ namespace Harness {
 
         // Regex for parsing options in the format "@Alpha: Value of any sort"
         const optionRegex = /^[\/]{2}\s*@(\w+)\s*:\s*([^\r\n]*)/gm;  // multiple matches on multiple lines
+        const linkRegex = /^[\/]{2}\s*@link\s*:\s*([^\r\n]*)\s*->\s*([^\r\n]*)/gm;  // multiple matches on multiple lines
 
         export function extractCompilerSettings(content: string): CompilerSettings {
             const opts: CompilerSettings = {};
@@ -1855,6 +1862,7 @@ namespace Harness {
             testUnitData: TestUnitData[];
             tsConfig: ts.ParsedCommandLine | undefined;
             tsConfigFileUnitData: TestUnitData | undefined;
+            symlinks?: vfs.FileSet;
         }
 
         /** Given a test file containing // @FileName directives, return an array of named units of code to be added to an existing compiler instance */
@@ -1869,10 +1877,16 @@ namespace Harness {
             let currentFileOptions: any = {};
             let currentFileName: any;
             let refs: string[] = [];
+            let symlinks: vfs.FileSet | undefined;
 
             for (const line of lines) {
-                const testMetaData = optionRegex.exec(line);
-                if (testMetaData) {
+                let testMetaData: RegExpExecArray | null;
+                const linkMetaData = linkRegex.exec(line);
+                if (linkMetaData) {
+                    if (!symlinks) symlinks = {};
+                    symlinks[linkMetaData[2].trim()] = new vfs.Symlink(linkMetaData[1].trim());
+                }
+                else if (testMetaData = optionRegex.exec(line)) {
                     // Comment line, check for global/file @options and record them
                     optionRegex.lastIndex = 0;
                     const metaDataName = testMetaData[1].toLowerCase();
@@ -1961,7 +1975,7 @@ namespace Harness {
                     break;
                 }
             }
-            return { settings, testUnitData, tsConfig, tsConfigFileUnitData };
+            return { settings, testUnitData, tsConfig, tsConfigFileUnitData, symlinks };
         }
     }
 
diff --git a/src/harness/sourceMapRecorder.ts b/src/harness/sourceMapRecorder.ts
index 9a62da6bb6fa7..22f0659690b61 100644
--- a/src/harness/sourceMapRecorder.ts
+++ b/src/harness/sourceMapRecorder.ts
@@ -7,177 +7,38 @@ namespace Harness.SourceMapRecorder {
 
     namespace SourceMapDecoder {
         let sourceMapMappings: string;
-        let sourceMapNames: string[] | undefined;
         let decodingIndex: number;
-        let prevNameIndex: number;
-        let decodeOfEncodedMapping: ts.SourceMapSpan;
-        let errorDecodeOfEncodedMapping: string | undefined;
+        let mappings: ts.sourcemaps.MappingsDecoder | undefined;
 
-        export function initializeSourceMapDecoding(sourceMapData: ts.SourceMapData) {
-            sourceMapMappings = sourceMapData.sourceMapMappings;
-            sourceMapNames = sourceMapData.sourceMapNames;
-            decodingIndex = 0;
-            prevNameIndex = 0;
-            decodeOfEncodedMapping = {
-                emittedLine: 1,
-                emittedColumn: 1,
-                sourceLine: 1,
-                sourceColumn: 1,
-                sourceIndex: 0,
-            };
-            errorDecodeOfEncodedMapping = undefined;
+        export interface DecodedMapping {
+            sourceMapSpan: ts.SourceMapSpan;
+            error?: string;
         }
 
-        function isSourceMappingSegmentEnd() {
-            if (decodingIndex === sourceMapMappings.length) {
-                return true;
-            }
-
-            if (sourceMapMappings.charAt(decodingIndex) === ",") {
-                return true;
-            }
-
-            if (sourceMapMappings.charAt(decodingIndex) === ";") {
-                return true;
-            }
-
-            return false;
+        export function initializeSourceMapDecoding(sourceMapData: ts.SourceMapData) {
+            decodingIndex = 0;
+            sourceMapMappings = sourceMapData.sourceMapMappings;
+            mappings = ts.sourcemaps.decodeMappings({
+                version: 3,
+                file: sourceMapData.sourceMapFile,
+                sources: sourceMapData.sourceMapSources,
+                sourceRoot: sourceMapData.sourceMapSourceRoot,
+                sourcesContent: sourceMapData.sourceMapSourcesContent,
+                mappings: sourceMapData.sourceMapMappings,
+                names: sourceMapData.sourceMapNames
+            });
         }
 
-        export function decodeNextEncodedSourceMapSpan() {
-            errorDecodeOfEncodedMapping = undefined;
-
-            function createErrorIfCondition(condition: boolean, errormsg: string) {
-                if (errorDecodeOfEncodedMapping) {
-                    // there was existing error:
-                    return true;
-                }
-
-                if (condition) {
-                    errorDecodeOfEncodedMapping = errormsg;
-                }
-
-                return condition;
-            }
-
-            function base64VLQFormatDecode() {
-                function base64FormatDecode() {
-                    return "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/".indexOf(sourceMapMappings.charAt(decodingIndex));
-                }
-
-                let moreDigits = true;
-                let shiftCount = 0;
-                let value = 0;
-
-                for (; moreDigits; decodingIndex++) {
-                    if (createErrorIfCondition(decodingIndex >= sourceMapMappings.length, "Error in decoding base64VLQFormatDecode, past the mapping string")) {
-                        return undefined!; // TODO: GH#18217
-                    }
-
-                    // 6 digit number
-                    const currentByte = base64FormatDecode();
-
-                    // If msb is set, we still have more bits to continue
-                    moreDigits = (currentByte & 32) !== 0;
-
-                    // least significant 5 bits are the next msbs in the final value.
-                    value = value | ((currentByte & 31) << shiftCount);
-                    shiftCount += 5;
-                }
-
-                // Least significant bit if 1 represents negative and rest of the msb is actual absolute value
-                if ((value & 1) === 0) {
-                    // + number
-                    value = value >> 1;
-                }
-                else {
-                    // - number
-                    value = value >> 1;
-                    value = -value;
-                }
-
-                return value;
-            }
-
-            while (decodingIndex < sourceMapMappings.length) {
-                if (sourceMapMappings.charAt(decodingIndex) === ";") {
-                    // New line
-                    decodeOfEncodedMapping.emittedLine++;
-                    decodeOfEncodedMapping.emittedColumn = 1;
-                    decodingIndex++;
-                    continue;
-                }
-
-                if (sourceMapMappings.charAt(decodingIndex) === ",") {
-                    // Next entry is on same line - no action needed
-                    decodingIndex++;
-                    continue;
-                }
-
-                // Read the current span
-                // 1. Column offset from prev read jsColumn
-                decodeOfEncodedMapping.emittedColumn += base64VLQFormatDecode();
-                // Incorrect emittedColumn dont support this map
-                if (createErrorIfCondition(decodeOfEncodedMapping.emittedColumn < 1, "Invalid emittedColumn found")) {
-                    return { error: errorDecodeOfEncodedMapping, sourceMapSpan: decodeOfEncodedMapping };
-                }
-                // Dont support reading mappings that dont have information about original source and its line numbers
-                if (createErrorIfCondition(isSourceMappingSegmentEnd(), "Unsupported Error Format: No entries after emitted column")) {
-                    return { error: errorDecodeOfEncodedMapping, sourceMapSpan: decodeOfEncodedMapping };
-                }
-
-                // 2. Relative sourceIndex
-                decodeOfEncodedMapping.sourceIndex += base64VLQFormatDecode();
-                // Incorrect sourceIndex dont support this map
-                if (createErrorIfCondition(decodeOfEncodedMapping.sourceIndex < 0, "Invalid sourceIndex found")) {
-                    return { error: errorDecodeOfEncodedMapping, sourceMapSpan: decodeOfEncodedMapping };
-                }
-                // Dont support reading mappings that dont have information about original source span
-                if (createErrorIfCondition(isSourceMappingSegmentEnd(), "Unsupported Error Format: No entries after sourceIndex")) {
-                    return { error: errorDecodeOfEncodedMapping, sourceMapSpan: decodeOfEncodedMapping };
-                }
-
-                // 3. Relative sourceLine 0 based
-                decodeOfEncodedMapping.sourceLine += base64VLQFormatDecode();
-                // Incorrect sourceLine dont support this map
-                if (createErrorIfCondition(decodeOfEncodedMapping.sourceLine < 1, "Invalid sourceLine found")) {
-                    return { error: errorDecodeOfEncodedMapping, sourceMapSpan: decodeOfEncodedMapping };
-                }
-                // Dont support reading mappings that dont have information about original source and its line numbers
-                if (createErrorIfCondition(isSourceMappingSegmentEnd(), "Unsupported Error Format: No entries after emitted Line")) {
-                    return { error: errorDecodeOfEncodedMapping, sourceMapSpan: decodeOfEncodedMapping };
-                }
-
-                // 4. Relative sourceColumn 0 based
-                decodeOfEncodedMapping.sourceColumn += base64VLQFormatDecode();
-                // Incorrect sourceColumn dont support this map
-                if (createErrorIfCondition(decodeOfEncodedMapping.sourceColumn < 1, "Invalid sourceLine found")) {
-                    return { error: errorDecodeOfEncodedMapping, sourceMapSpan: decodeOfEncodedMapping };
-                }
-                // 5. Check if there is name:
-                if (!isSourceMappingSegmentEnd()) {
-                    prevNameIndex += base64VLQFormatDecode();
-                    decodeOfEncodedMapping.nameIndex = prevNameIndex;
-                    // Incorrect nameIndex dont support this map
-                    if (createErrorIfCondition(decodeOfEncodedMapping.nameIndex < 0 || decodeOfEncodedMapping.nameIndex >= sourceMapNames!.length, "Invalid name index for the source map entry")) {
-                        return { error: errorDecodeOfEncodedMapping, sourceMapSpan: decodeOfEncodedMapping };
-                    }
-                }
-                // Dont support reading mappings that dont have information about original source and its line numbers
-                if (createErrorIfCondition(!isSourceMappingSegmentEnd(), "Unsupported Error Format: There are more entries after " + (decodeOfEncodedMapping.nameIndex === -1 ? "sourceColumn" : "nameIndex"))) {
-                    return { error: errorDecodeOfEncodedMapping, sourceMapSpan: decodeOfEncodedMapping };
-                }
-
-                // Populated the entry
-                return { error: errorDecodeOfEncodedMapping, sourceMapSpan: decodeOfEncodedMapping };
-            }
-
-            createErrorIfCondition(/*condition*/ true, "No encoded entry found");
-            return undefined!; // TODO: GH#18217
+        export function decodeNextEncodedSourceMapSpan(): DecodedMapping {
+            if (!mappings) return ts.Debug.fail("not initialized");
+            const result = mappings.next();
+            if (result.done) return { error: mappings.error || "No encoded entry found", sourceMapSpan: mappings.lastSpan };
+            return { sourceMapSpan: result.value };
         }
 
         export function hasCompletedDecoding() {
-            return decodingIndex === sourceMapMappings.length;
+            if (!mappings) return ts.Debug.fail("not initialized");
+            return mappings.decodingIndex === sourceMapMappings.length;
         }
 
         export function getRemainingDecodeString() {
@@ -197,7 +58,7 @@ namespace Harness.SourceMapRecorder {
 
         let spansOnSingleLine: SourceMapSpanWithDecodeErrors[];
         let prevWrittenSourcePos: number;
-        let prevWrittenJsLine: number;
+        let nextJsLineToWrite: number;
         let spanMarkerContinues: boolean;
 
         export function initializeSourceMapSpanWriter(sourceMapRecordWriter: Compiler.WriterAggregator, sourceMapData: ts.SourceMapData, currentJsFile: documents.TextDocument) {
@@ -210,7 +71,7 @@ namespace Harness.SourceMapRecorder {
 
             spansOnSingleLine = [];
             prevWrittenSourcePos = 0;
-            prevWrittenJsLine = 0;
+            nextJsLineToWrite = 0;
             spanMarkerContinues = false;
 
             SourceMapDecoder.initializeSourceMapDecoding(sourceMapData);
@@ -227,7 +88,7 @@ namespace Harness.SourceMapRecorder {
         }
 
         function getSourceMapSpanString(mapEntry: ts.SourceMapSpan, getAbsentNameIndex?: boolean) {
-            let mapString = "Emitted(" + mapEntry.emittedLine + ", " + mapEntry.emittedColumn + ") Source(" + mapEntry.sourceLine + ", " + mapEntry.sourceColumn + ") + SourceIndex(" + mapEntry.sourceIndex + ")";
+            let mapString = "Emitted(" + (mapEntry.emittedLine + 1) + ", " + (mapEntry.emittedColumn + 1) + ") Source(" + (mapEntry.sourceLine + 1) + ", " + (mapEntry.sourceColumn + 1) + ") + SourceIndex(" + mapEntry.sourceIndex + ")";
             if (mapEntry.nameIndex! >= 0 && mapEntry.nameIndex! < sourceMapNames!.length) {
                 mapString += " name (" + sourceMapNames![mapEntry.nameIndex!] + ")";
             }
@@ -244,7 +105,7 @@ namespace Harness.SourceMapRecorder {
             // verify the decoded span is same as the new span
             const decodeResult = SourceMapDecoder.decodeNextEncodedSourceMapSpan();
             let decodeErrors: string[] | undefined;
-            if (decodeResult.error
+            if (typeof decodeResult.error === "string"
                 || decodeResult.sourceMapSpan.emittedLine   !== sourceMapSpan.emittedLine
                 || decodeResult.sourceMapSpan.emittedColumn !== sourceMapSpan.emittedColumn
                 || decodeResult.sourceMapSpan.sourceLine    !== sourceMapSpan.sourceLine
@@ -305,8 +166,8 @@ namespace Harness.SourceMapRecorder {
         }
 
         function writeJsFileLines(endJsLine: number) {
-            for (; prevWrittenJsLine < endJsLine; prevWrittenJsLine++) {
-                sourceMapRecorder.Write(">>>" + getTextOfLine(prevWrittenJsLine, jsLineMap, jsFile.text));
+            for (; nextJsLineToWrite < endJsLine; nextJsLineToWrite++) {
+                sourceMapRecorder.Write(">>>" + getTextOfLine(nextJsLineToWrite, jsLineMap, jsFile.text));
             }
         }
 
@@ -331,7 +192,7 @@ namespace Harness.SourceMapRecorder {
 
             let prevEmittedCol!: number;
             function iterateSpans(fn: (currentSpan: SourceMapSpanWithDecodeErrors, index: number) => void) {
-                prevEmittedCol = 1;
+                prevEmittedCol = 0;
                 for (let i = 0; i < spansOnSingleLine.length; i++) {
                     fn(spansOnSingleLine[i], i);
                     prevEmittedCol = spansOnSingleLine[i].sourceMapSpan.emittedColumn;
@@ -340,7 +201,7 @@ namespace Harness.SourceMapRecorder {
 
             function writeSourceMapIndent(indentLength: number, indentPrefix: string) {
                 sourceMapRecorder.Write(indentPrefix);
-                for (let i = 1; i < indentLength; i++) {
+                for (let i = 0; i < indentLength; i++) {
                     sourceMapRecorder.Write(" ");
                 }
             }
@@ -362,7 +223,7 @@ namespace Harness.SourceMapRecorder {
             }
 
             function writeSourceMapSourceText(currentSpan: SourceMapSpanWithDecodeErrors, index: number) {
-                const sourcePos = tsLineMap[currentSpan.sourceMapSpan.sourceLine - 1] + (currentSpan.sourceMapSpan.sourceColumn - 1);
+                const sourcePos = tsLineMap[currentSpan.sourceMapSpan.sourceLine] + (currentSpan.sourceMapSpan.sourceColumn);
                 let sourceText = "";
                 if (prevWrittenSourcePos < sourcePos) {
                     // Position that goes forward, get text
@@ -397,15 +258,15 @@ namespace Harness.SourceMapRecorder {
                 const currentJsLine = spansOnSingleLine[0].sourceMapSpan.emittedLine;
 
                 // Write js line
-                writeJsFileLines(currentJsLine);
+                writeJsFileLines(currentJsLine + 1);
 
                 // Emit markers
                 iterateSpans(writeSourceMapMarker);
 
-                const jsFileText = getTextOfLine(currentJsLine, jsLineMap, jsFile.text);
-                if (prevEmittedCol < jsFileText.length) {
+                const jsFileText = getTextOfLine(currentJsLine + 1, jsLineMap, jsFile.text);
+                if (prevEmittedCol < jsFileText.length - 1) {
                     // There is remaining text on this line that will be part of next source span so write marker that continues
-                    writeSourceMapMarker(/*currentSpan*/ undefined!, spansOnSingleLine.length, /*endColumn*/ jsFileText.length, /*endContinues*/ true); // TODO: GH#18217
+                    writeSourceMapMarker(/*currentSpan*/ undefined!, spansOnSingleLine.length, /*endColumn*/ jsFileText.length - 1, /*endContinues*/ true); // TODO: GH#18217
                 }
 
                 // Emit Source text
diff --git a/src/harness/tsconfig.json b/src/harness/tsconfig.json
index b1f2558f86184..c162e6bdb5265 100644
--- a/src/harness/tsconfig.json
+++ b/src/harness/tsconfig.json
@@ -11,8 +11,6 @@
         ]
     },
     "references": [
-        { "path": "../core" },
-        { "path": "../parser" },
         { "path": "../compiler" },
         { "path": "../services" },
         { "path": "../jsTyping" },
diff --git a/src/harness/vfs.ts b/src/harness/vfs.ts
index 2c1c6f2dd542b..ae99187f5fade 100644
--- a/src/harness/vfs.ts
+++ b/src/harness/vfs.ts
@@ -126,6 +126,24 @@ namespace vfs {
             return this._shadowRoot;
         }
 
+        /**
+         * Snapshots the current file system, effectively shadowing itself. This is useful for
+         * generating file system patches using `.diff()` from one snapshot to the next. Performs
+         * no action if this file system is read-only.
+         */
+        public snapshot() {
+            if (this.isReadonly) return;
+            const fs = new FileSystem(this.ignoreCase, { time: this._time });
+            fs._lazy = this._lazy;
+            fs._cwd = this._cwd;
+            fs._time = this._time;
+            fs._shadowRoot = this._shadowRoot;
+            fs._dirStack = this._dirStack;
+            fs.makeReadonly();
+            this._lazy = {};
+            this._shadowRoot = fs;
+        }
+
         /**
          * Gets a shadow copy of this file system. Changes to the shadow copy do not affect the
          * original, allowing multiple copies of the same core file system without multiple copies
@@ -671,6 +689,160 @@ namespace vfs {
             node.ctimeMs = time;
         }
 
+        /**
+         * Generates a `FileSet` patch containing all the entries in this `FileSystem` that are not in `base`.
+         * @param base The base file system. If not provided, this file system's `shadowRoot` is used (if present).
+         */
+        public diff(base = this.shadowRoot) {
+            const differences: FileSet = {};
+            const hasDifferences = base ? FileSystem.rootDiff(differences, this, base) : FileSystem.trackCreatedInodes(differences, this, this._getRootLinks());
+            return hasDifferences ? differences : undefined;
+        }
+
+        /**
+         * Generates a `FileSet` patch containing all the entries in `chagned` that are not in `base`.
+         */
+        public static diff(changed: FileSystem, base: FileSystem) {
+            const differences: FileSet = {};
+            return FileSystem.rootDiff(differences, changed, base) ? differences : undefined;
+        }
+
+        private static diffWorker(container: FileSet, changed: FileSystem, changedLinks: ReadonlyMap<string, Inode> | undefined, base: FileSystem, baseLinks: ReadonlyMap<string, Inode> | undefined) {
+            if (changedLinks && !baseLinks) return FileSystem.trackCreatedInodes(container, changed, changedLinks);
+            if (baseLinks && !changedLinks) return FileSystem.trackDeletedInodes(container, baseLinks);
+            if (changedLinks && baseLinks) {
+                let hasChanges = false;
+                // track base items missing in changed
+                baseLinks.forEach((node, basename) => {
+                    if (!changedLinks.has(basename)) {
+                        container[basename] = isDirectory(node) ? new Rmdir() : new Unlink();
+                        hasChanges = true;
+                    }
+                });
+                // track changed items missing or differing in base
+                changedLinks.forEach((changedNode, basename) => {
+                    const baseNode = baseLinks.get(basename);
+                    if (baseNode) {
+                        if (isDirectory(changedNode) && isDirectory(baseNode)) {
+                            return hasChanges = FileSystem.directoryDiff(container, basename, changed, changedNode, base, baseNode) || hasChanges;
+                        }
+                        if (isFile(changedNode) && isFile(baseNode)) {
+                            return hasChanges = FileSystem.fileDiff(container, basename, changed, changedNode, base, baseNode) || hasChanges;
+                        }
+                        if (isSymlink(changedNode) && isSymlink(baseNode)) {
+                            return hasChanges = FileSystem.symlinkDiff(container, basename, changedNode, baseNode) || hasChanges;
+                        }
+                    }
+                    return hasChanges = FileSystem.trackCreatedInode(container, basename, changed, changedNode) || hasChanges;
+                });
+                return hasChanges;
+            }
+            return false;
+        }
+
+        private static rootDiff(container: FileSet, changed: FileSystem, base: FileSystem) {
+            while (!changed._lazy.links && changed._shadowRoot) changed = changed._shadowRoot;
+            while (!base._lazy.links && base._shadowRoot) base = base._shadowRoot;
+
+            // no difference if the file systems are the same reference
+            if (changed === base) return false;
+
+            // no difference if the root links are empty and unshadowed
+            if (!changed._lazy.links && !changed._shadowRoot && !base._lazy.links && !base._shadowRoot) return false;
+
+            return FileSystem.diffWorker(container, changed, changed._getRootLinks(), base, base._getRootLinks());
+        }
+
+        private static directoryDiff(container: FileSet, basename: string, changed: FileSystem, changedNode: DirectoryInode, base: FileSystem, baseNode: DirectoryInode) {
+            while (!changedNode.links && changedNode.shadowRoot) changedNode = changedNode.shadowRoot;
+            while (!baseNode.links && baseNode.shadowRoot) baseNode = baseNode.shadowRoot;
+
+            // no difference if the nodes are the same reference
+            if (changedNode === baseNode) return false;
+
+            // no difference if both nodes are non shadowed and have no entries
+            if (isEmptyNonShadowedDirectory(changedNode) && isEmptyNonShadowedDirectory(baseNode)) return false;
+
+            // no difference if both nodes are unpopulated and point to the same mounted file system
+            if (!changedNode.links && !baseNode.links &&
+                changedNode.resolver && changedNode.source !== undefined &&
+                baseNode.resolver === changedNode.resolver && baseNode.source === changedNode.source) return false;
+
+            // no difference if both nodes have identical children
+            const children: FileSet = {};
+            if (!FileSystem.diffWorker(children, changed, changed._getLinks(changedNode), base, base._getLinks(baseNode))) {
+                return false;
+            }
+
+            container[basename] = new Directory(children);
+            return true;
+        }
+
+        private static fileDiff(container: FileSet, basename: string, changed: FileSystem, changedNode: FileInode, base: FileSystem, baseNode: FileInode) {
+            while (!changedNode.buffer && changedNode.shadowRoot) changedNode = changedNode.shadowRoot;
+            while (!baseNode.buffer && baseNode.shadowRoot) baseNode = baseNode.shadowRoot;
+
+            // no difference if the nodes are the same reference
+            if (changedNode === baseNode) return false;
+
+            // no difference if both nodes are non shadowed and have no entries
+            if (isEmptyNonShadowedFile(changedNode) && isEmptyNonShadowedFile(baseNode)) return false;
+
+            // no difference if both nodes are unpopulated and point to the same mounted file system
+            if (!changedNode.buffer && !baseNode.buffer &&
+                changedNode.resolver && changedNode.source !== undefined &&
+                baseNode.resolver === changedNode.resolver && baseNode.source === changedNode.source) return false;
+
+            const changedBuffer = changed._getBuffer(changedNode);
+            const baseBuffer = base._getBuffer(baseNode);
+
+            // no difference if both buffers are the same reference
+            if (changedBuffer === baseBuffer) return false;
+
+            // no difference if both buffers are identical
+            if (Buffer.compare(changedBuffer, baseBuffer) === 0) return false;
+
+            container[basename] = new File(changedBuffer);
+            return true;
+        }
+
+        private static symlinkDiff(container: FileSet, basename: string, changedNode: SymlinkInode, baseNode: SymlinkInode) {
+            // no difference if the nodes are the same reference
+            if (changedNode.symlink === baseNode.symlink) return false;
+            container[basename] = new Symlink(changedNode.symlink);
+            return true;
+        }
+
+        private static trackCreatedInode(container: FileSet, basename: string, changed: FileSystem, node: Inode) {
+            if (isDirectory(node)) {
+                const children: FileSet = {};
+                FileSystem.trackCreatedInodes(children, changed, changed._getLinks(node));
+                container[basename] = new Directory(children);
+            }
+            else if (isSymlink(node)) {
+                container[basename] = new Symlink(node.symlink);
+            }
+            else {
+                container[basename] = new File(node.buffer || "");
+            }
+            return true;
+        }
+
+        private static trackCreatedInodes(container: FileSet, changed: FileSystem, changedLinks: ReadonlyMap<string, Inode>) {
+            // no difference if links are empty
+            if (!changedLinks.size) return false;
+
+            changedLinks.forEach((node, basename) => { FileSystem.trackCreatedInode(container, basename, changed, node); });
+            return true;
+        }
+
+        private static trackDeletedInodes(container: FileSet, baseLinks: ReadonlyMap<string, Inode>) {
+            // no difference if links are empty
+            if (!baseLinks.size) return false;
+            baseLinks.forEach((node, basename) => { container[basename] = isDirectory(node) ? new Rmdir() : new Unlink(); });
+            return true;
+        }
+
         private _mknod(dev: number, type: typeof S_IFREG, mode: number, time?: number): FileInode;
         private _mknod(dev: number, type: typeof S_IFDIR, mode: number, time?: number): DirectoryInode;
         private _mknod(dev: number, type: typeof S_IFLNK, mode: number, time?: number): SymlinkInode;
@@ -911,7 +1083,7 @@ namespace vfs {
                     if (this.stringComparer(vpath.dirname(path), path) === 0) {
                         throw new TypeError("Roots cannot be symbolic links.");
                     }
-                    this.symlinkSync(entry.symlink, path);
+                    this.symlinkSync(vpath.resolve(dirname, entry.symlink), path);
                     this._applyFileExtendedOptions(path, entry);
                 }
                 else if (entry instanceof Link) {
@@ -940,10 +1112,10 @@ namespace vfs {
 
         private _applyFilesWorker(files: FileSet, dirname: string, deferred: [Symlink | Link | Mount, string][]) {
             for (const key of Object.keys(files)) {
-                const value = this._normalizeFileSetEntry(files[key]);
+                const value = normalizeFileSetEntry(files[key]);
                 const path = dirname ? vpath.resolve(dirname, key) : key;
                 vpath.validate(path, vpath.ValidationFlags.Absolute);
-                if (value === null || value === undefined) {
+                if (value === null || value === undefined || value instanceof Rmdir || value instanceof Unlink) {
                     if (this.stringComparer(vpath.dirname(path), path) === 0) {
                         throw new TypeError("Roots cannot be deleted.");
                     }
@@ -967,19 +1139,6 @@ namespace vfs {
                 }
             }
         }
-
-        private _normalizeFileSetEntry(value: FileSet[string]) {
-            if (value === undefined ||
-                value === null ||
-                value instanceof Directory ||
-                value instanceof File ||
-                value instanceof Link ||
-                value instanceof Symlink ||
-                value instanceof Mount) {
-                return value;
-            }
-            return typeof value === "string" || Buffer.isBuffer(value) ? new File(value) : new Directory(value);
-        }
     }
 
     export interface FileSystemOptions {
@@ -997,12 +1156,9 @@ namespace vfs {
         meta?: Record<string, any>;
     }
 
-    export interface FileSystemCreateOptions {
+    export interface FileSystemCreateOptions extends FileSystemOptions {
         // Sets the documents to add to the file system.
         documents?: ReadonlyArray<documents.TextDocument>;
-
-        // Sets the initial working directory for the file system.
-        cwd?: string;
     }
 
     export type Axis = "ancestors" | "ancestors-or-self" | "self" | "descendants-or-self" | "descendants";
@@ -1062,8 +1218,16 @@ namespace vfs {
      *
      * Unless overridden, `/.src` will be the current working directory for the virtual file system.
      */
-    export function createFromFileSystem(host: FileSystemResolverHost, ignoreCase: boolean, { documents, cwd }: FileSystemCreateOptions = {}) {
+    export function createFromFileSystem(host: FileSystemResolverHost, ignoreCase: boolean, { documents, files, cwd, time, meta }: FileSystemCreateOptions = {}) {
         const fs = getBuiltLocal(host, ignoreCase).shadow();
+        if (meta) {
+            for (const key of Object.keys(meta)) {
+                fs.meta.set(key, meta[key]);
+            }
+        }
+        if (time) {
+            fs.time(time);
+        }
         if (cwd) {
             fs.mkdirpSync(cwd);
             fs.chdir(cwd);
@@ -1078,12 +1242,14 @@ namespace vfs {
                 if (symlink) {
                     for (const link of symlink.split(",").map(link => link.trim())) {
                         fs.mkdirpSync(vpath.dirname(link));
-                        fs.symlinkSync(document.file, link);
-                        fs.filemeta(link).set("document", document);
+                        fs.symlinkSync(vpath.resolve(fs.cwd(), document.file), link);
                     }
                 }
             }
         }
+        if (files) {
+            fs.apply(files);
+        }
         return fs;
     }
 
@@ -1166,7 +1332,7 @@ namespace vfs {
      * A template used to populate files, directories, links, etc. in a virtual file system.
      */
     export interface FileSet {
-        [name: string]: DirectoryLike | FileLike | Link | Symlink | Mount | null | undefined;
+        [name: string]: DirectoryLike | FileLike | Link | Symlink | Mount | Rmdir | Unlink | null | undefined;
     }
 
     export type DirectoryLike = FileSet | Directory;
@@ -1202,6 +1368,16 @@ namespace vfs {
         }
     }
 
+    /** Removes a directory in a `FileSet` */
+    export class Rmdir {
+        public _rmdirBrand?: never; // brand necessary for proper type guards
+    }
+
+    /** Unlinks a file in a `FileSet` */
+    export class Unlink {
+        public _unlinkBrand?: never; // brand necessary for proper type guards
+    }
+
     /** Extended options for a symbolic link in a `FileSet` */
     export class Symlink {
         public readonly symlink: string;
@@ -1274,6 +1450,14 @@ namespace vfs {
         meta?: collections.Metadata;
     }
 
+    function isEmptyNonShadowedDirectory(node: DirectoryInode) {
+        return !node.links && !node.shadowRoot && !node.resolver && !node.source;
+    }
+
+    function isEmptyNonShadowedFile(node: FileInode) {
+        return !node.buffer && !node.shadowRoot && !node.resolver && !node.source;
+    }
+
     function isFile(node: Inode | undefined): node is FileInode {
         return node !== undefined && (node.mode & S_IFMT) === S_IFREG;
     }
@@ -1325,5 +1509,55 @@ namespace vfs {
         }
         return builtLocalCS;
     }
+
+    function normalizeFileSetEntry(value: FileSet[string]) {
+        if (value === undefined ||
+            value === null ||
+            value instanceof Directory ||
+            value instanceof File ||
+            value instanceof Link ||
+            value instanceof Symlink ||
+            value instanceof Mount ||
+            value instanceof Rmdir ||
+            value instanceof Unlink) {
+            return value;
+        }
+        return typeof value === "string" || Buffer.isBuffer(value) ? new File(value) : new Directory(value);
+    }
+
+    export function formatPatch(patch: FileSet) {
+        return formatPatchWorker("", patch);
+    }
+
+    function formatPatchWorker(dirname: string, container: FileSet): string {
+        let text = "";
+        for (const name of Object.keys(container)) {
+            const entry = normalizeFileSetEntry(container[name]);
+            const file = dirname ? vpath.combine(dirname, name) : name;
+            if (entry === null || entry === undefined || entry instanceof Unlink || entry instanceof Rmdir) {
+                text += `//// [${file}] unlink\r\n`;
+            }
+            else if (entry instanceof Rmdir) {
+                text += `//// [${vpath.addTrailingSeparator(file)}] rmdir\r\n`;
+            }
+            else if (entry instanceof Directory) {
+                text += formatPatchWorker(file, entry.files);
+            }
+            else if (entry instanceof File) {
+                const content = typeof entry.data === "string" ? entry.data : entry.data.toString("utf8");
+                text += `//// [${file}]\r\n${content}\r\n\r\n`;
+            }
+            else if (entry instanceof Link) {
+                text += `//// [${file}] link(${entry.path})\r\n`;
+            }
+            else if (entry instanceof Symlink) {
+                text += `//// [${file}] symlink(${entry.symlink})\r\n`;
+            }
+            else if (entry instanceof Mount) {
+                text += `//// [${file}] mount(${entry.source})\r\n`;
+            }
+        }
+        return text;
+    }
 }
 // tslint:enable:no-null-keyword
\ No newline at end of file
diff --git a/src/jsTyping/shared.ts b/src/jsTyping/shared.ts
index a5528b7ba63c6..54b34193d063f 100644
--- a/src/jsTyping/shared.ts
+++ b/src/jsTyping/shared.ts
@@ -1,3 +1,4 @@
+/* @internal */
 namespace ts.server {
     // tslint:disable variable-name
     export const ActionSet: ActionSet = "action::set";
diff --git a/src/jsTyping/tsconfig.json b/src/jsTyping/tsconfig.json
index 86ebfe8af5a56..4886463e16382 100644
--- a/src/jsTyping/tsconfig.json
+++ b/src/jsTyping/tsconfig.json
@@ -11,8 +11,7 @@
         ]
     },
     "references": [
-        { "path": "../core" },
-        { "path": "../parser" }
+        { "path": "../compiler" }
     ],
     "files": [
         "shared.ts",
diff --git a/src/jsTyping/types.ts b/src/jsTyping/types.ts
index 4e00c2eb6f5e4..dfa47ccd7def8 100644
--- a/src/jsTyping/types.ts
+++ b/src/jsTyping/types.ts
@@ -1,3 +1,4 @@
+/* @internal */
 declare namespace ts.server {
     export type ActionSet = "action::set";
     export type ActionInvalidate = "action::invalidate";
diff --git a/src/loc/lcl/chs/diagnosticMessages/diagnosticMessages.generated.json.lcl b/src/loc/lcl/chs/diagnosticMessages/diagnosticMessages.generated.json.lcl
index add68869804a2..b50ede11693b7 100644
--- a/src/loc/lcl/chs/diagnosticMessages/diagnosticMessages.generated.json.lcl
+++ b/src/loc/lcl/chs/diagnosticMessages/diagnosticMessages.generated.json.lcl
@@ -486,12 +486,18 @@
       <Item ItemId=";A_non_dry_build_would_build_project_0_6357" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A non-dry build would build project '{0}']]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[非干燥生成将生成项目“{0}”]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_non_dry_build_would_delete_the_following_files_Colon_0_6356" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A non-dry build would delete the following files: {0}]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[非干燥生成将删除以下文件: {0}]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -960,6 +966,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Add_braces_to_arrow_function_95059" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Add braces to arrow function]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[向箭头函数添加大括号]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Add_definite_assignment_assertion_to_property_0_95020" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Add definite assignment assertion to property '{0}']]></Val>
@@ -1029,6 +1044,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Add_or_remove_braces_in_an_arrow_function_95058" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Add or remove braces in an arrow function]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[添加或删除箭头函数中的大括号]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Add_qualifier_to_all_unresolved_variables_matching_a_member_name_95037" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Add qualifier to all unresolved variables matching a member name]]></Val>
@@ -1773,18 +1797,27 @@
       <Item ItemId=";Build_all_projects_including_those_that_appear_to_be_up_to_date_6368" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Build all projects, including those that appear to be up to date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[生成所有项目，包括那些似乎已是最新的项目]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Build_one_or_more_projects_and_their_dependencies_if_out_of_date_6364" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Build one or more projects and their dependencies, if out of date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[生成一个或多个项目及其依赖项(如果已过期)]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Building_project_0_6358" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Building project '{0}'...]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[正在生成项目“{0}”...]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -2865,6 +2898,9 @@
       <Item ItemId=";Delete_the_outputs_of_all_projects_6365" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Delete the outputs of all projects]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[删除所有项目的输出]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -3327,6 +3363,9 @@
       <Item ItemId=";Enable_verbose_logging_6366" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Enable verbose logging]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[启用详细日志记录]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -5760,6 +5799,9 @@
       <Item ItemId=";Option_build_must_be_the_first_command_line_argument_6369" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Option '--build' must be the first command line argument.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[选项 '--build' 必须是第一个命令行参数。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -5802,6 +5844,9 @@
       <Item ItemId=";Options_0_and_1_cannot_be_combined_6370" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Options '{0}' and '{1}' cannot be combined.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[选项“{0}”与“{1}”不能组合在一起。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6240,42 +6285,63 @@
       <Item ItemId=";Project_0_can_t_be_built_because_its_dependency_1_has_errors_6363" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' can't be built because its dependency '{1}' has errors]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[无法生成项目“{0}”，因为其依赖项“{1}”有错误]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_out_of_date_because_its_dependency_1_is_out_of_date_6353" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is out of date because its dependency '{1}' is out of date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[项目“{0}”已过期，因为其依赖项“{1}”已过期]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_out_of_date_because_oldest_output_1_is_older_than_newest_input_2_6350" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is out of date because oldest output '{1}' is older than newest input '{2}']]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[项目“{0}”已过期，因为最早的输出“{1}”早于最新的输入“{2}”]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_out_of_date_because_output_file_1_does_not_exist_6352" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is out of date because output file '{1}' does not exist]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[项目“{0}”已过期，因为输出文件“{1}”不存在]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_up_to_date_6361" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is up to date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[“{0}”项目已是最新]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_up_to_date_because_newest_input_1_is_older_than_oldest_output_2_6351" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is up to date because newest input '{1}' is older than oldest output '{2}']]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[项目“{0}”已是最新，因为最新的输入“{1}”早于最早的输出“{2}”]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_up_to_date_with_d_ts_files_from_its_dependencies_6354" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is up to date with .d.ts files from its dependencies]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[项目“{0}”已是最新，拥有来自其依赖项的 .d.ts 文件]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6291,6 +6357,9 @@
       <Item ItemId=";Projects_in_this_build_Colon_0_6355" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Projects in this build: {0}]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[此生成中的项目: {0}]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6756,6 +6825,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Remove_braces_from_arrow_function_95060" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Remove braces from arrow function]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[从箭头函数中删除大括号]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Remove_declaration_for_Colon_0_90004" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Remove declaration for: '{0}']]></Val>
@@ -7332,6 +7410,9 @@
       <Item ItemId=";Show_what_would_be_built_or_deleted_if_specified_with_clean_6367" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Show what would be built (or deleted, if specified with '--clean')]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[显示将生成(如果指定有 '--clean'，则删除)什么]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -7356,12 +7437,18 @@
       <Item ItemId=";Skipping_build_of_project_0_because_its_dependency_1_has_errors_6362" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Skipping build of project '{0}' because its dependency '{1}' has errors]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[正在跳过项目“{0}”的生成，因为其依赖项“{1}”有错误]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Skipping_clean_because_not_all_projects_could_be_located_6371" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Skipping clean because not all projects could be located]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[正在跳过清理，因为并非所有项目都可找到]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -8976,6 +9063,9 @@
       <Item ItemId=";Updating_output_timestamps_of_project_0_6359" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Updating output timestamps of project '{0}'...]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[正在更新项目“{0}”的输出时间戳...]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -9531,6 +9621,9 @@
       <Item ItemId=";delete_this_Project_0_is_up_to_date_because_it_was_previously_built_6360" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[delete this - Project '{0}' is up to date because it was previously built]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[删除此 - 项目“{0}”已是最新，因为它是以前生成的]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
diff --git a/src/loc/lcl/cht/diagnosticMessages/diagnosticMessages.generated.json.lcl b/src/loc/lcl/cht/diagnosticMessages/diagnosticMessages.generated.json.lcl
index de96a3420671e..5f7122bd70c35 100644
--- a/src/loc/lcl/cht/diagnosticMessages/diagnosticMessages.generated.json.lcl
+++ b/src/loc/lcl/cht/diagnosticMessages/diagnosticMessages.generated.json.lcl
@@ -486,12 +486,18 @@
       <Item ItemId=";A_non_dry_build_would_build_project_0_6357" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A non-dry build would build project '{0}']]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[非 DRY 的組建會建置專案 '{0}']]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_non_dry_build_would_delete_the_following_files_Colon_0_6356" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A non-dry build would delete the following files: {0}]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[非 DRY 的組建會刪除下列檔案: {0}]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -960,6 +966,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Add_braces_to_arrow_function_95059" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Add braces to arrow function]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[將大括號新增至箭號函式]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Add_definite_assignment_assertion_to_property_0_95020" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Add definite assignment assertion to property '{0}']]></Val>
@@ -1029,6 +1044,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Add_or_remove_braces_in_an_arrow_function_95058" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Add or remove braces in an arrow function]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[在箭號函式中新增或移除大括號]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Add_qualifier_to_all_unresolved_variables_matching_a_member_name_95037" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Add qualifier to all unresolved variables matching a member name]]></Val>
@@ -1773,18 +1797,27 @@
       <Item ItemId=";Build_all_projects_including_those_that_appear_to_be_up_to_date_6368" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Build all projects, including those that appear to be up to date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[建置包括似乎已是最新狀態的所有專案]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Build_one_or_more_projects_and_their_dependencies_if_out_of_date_6364" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Build one or more projects and their dependencies, if out of date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[若已過期，則建置一或多個專案及其相依性]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Building_project_0_6358" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Building project '{0}'...]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[正在建置專案 '{0}'...]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -2865,6 +2898,9 @@
       <Item ItemId=";Delete_the_outputs_of_all_projects_6365" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Delete the outputs of all projects]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[刪除所有專案的輸出]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -3327,6 +3363,9 @@
       <Item ItemId=";Enable_verbose_logging_6366" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Enable verbose logging]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[啟用詳細資訊記錄]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -5760,6 +5799,9 @@
       <Item ItemId=";Option_build_must_be_the_first_command_line_argument_6369" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Option '--build' must be the first command line argument.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[選項 '--build' 必須是第一個命令列引數。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -5802,6 +5844,9 @@
       <Item ItemId=";Options_0_and_1_cannot_be_combined_6370" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Options '{0}' and '{1}' cannot be combined.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[無法合併選項 '{0}' 與 '{1}'。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6240,42 +6285,63 @@
       <Item ItemId=";Project_0_can_t_be_built_because_its_dependency_1_has_errors_6363" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' can't be built because its dependency '{1}' has errors]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[因為專案 '{0}' 的相依性 '{1}' 發生錯誤，所以無法建置該專案]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_out_of_date_because_its_dependency_1_is_out_of_date_6353" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is out of date because its dependency '{1}' is out of date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[因為專案 '{0}' 的相依性 '{1}' 已過期，所以該專案已過期]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_out_of_date_because_oldest_output_1_is_older_than_newest_input_2_6350" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is out of date because oldest output '{1}' is older than newest input '{2}']]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[因為最舊的輸出 '{1}' 早於最新的輸入 '{2}'，所以專案 '{0}' 已過期]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_out_of_date_because_output_file_1_does_not_exist_6352" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is out of date because output file '{1}' does not exist]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[因為輸出檔案 '{1}' 不存在，所以專案 '{0}' 已過期]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_up_to_date_6361" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is up to date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[專案 '{0}' 為最新狀態]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_up_to_date_because_newest_input_1_is_older_than_oldest_output_2_6351" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is up to date because newest input '{1}' is older than oldest output '{2}']]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[因為最新的輸入 '{1}' 早於最舊的輸出 '{2}'，所以專案 '{0}' 為最新狀態]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_up_to_date_with_d_ts_files_from_its_dependencies_6354" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is up to date with .d.ts files from its dependencies]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[專案 '{0}' 為最新狀態，且有來自其相依性的 .d.ts 檔案]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6291,6 +6357,9 @@
       <Item ItemId=";Projects_in_this_build_Colon_0_6355" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Projects in this build: {0}]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[此組建中的專案: {0}]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6756,6 +6825,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Remove_braces_from_arrow_function_95060" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Remove braces from arrow function]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[從箭號函式移除大括號]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Remove_declaration_for_Colon_0_90004" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Remove declaration for: '{0}']]></Val>
@@ -7332,6 +7410,9 @@
       <Item ItemId=";Show_what_would_be_built_or_deleted_if_specified_with_clean_6367" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Show what would be built (or deleted, if specified with '--clean')]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[顯示將會建置 (或刪除 - 若是指定有 '--clean') 的內容]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -7356,12 +7437,18 @@
       <Item ItemId=";Skipping_build_of_project_0_because_its_dependency_1_has_errors_6362" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Skipping build of project '{0}' because its dependency '{1}' has errors]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[因為專案 '{0}' 的相依性 '{1}' 發生錯誤，所以跳過建置該專案]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Skipping_clean_because_not_all_projects_could_be_located_6371" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Skipping clean because not all projects could be located]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[因為並非所有專案都可找到，所以跳過清理]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -8976,6 +9063,9 @@
       <Item ItemId=";Updating_output_timestamps_of_project_0_6359" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Updating output timestamps of project '{0}'...]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[正在更新專案 '{0}' 的輸出時間戳記...]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -9531,6 +9621,9 @@
       <Item ItemId=";delete_this_Project_0_is_up_to_date_because_it_was_previously_built_6360" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[delete this - Project '{0}' is up to date because it was previously built]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[刪除此項目 - 因為先前已建置專案 '{0}'，所以其為最新狀態]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
diff --git a/src/loc/lcl/csy/diagnosticMessages/diagnosticMessages.generated.json.lcl b/src/loc/lcl/csy/diagnosticMessages/diagnosticMessages.generated.json.lcl
index 1d250c68944f5..83593091330ae 100644
--- a/src/loc/lcl/csy/diagnosticMessages/diagnosticMessages.generated.json.lcl
+++ b/src/loc/lcl/csy/diagnosticMessages/diagnosticMessages.generated.json.lcl
@@ -492,6 +492,24 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";A_non_dry_build_would_build_project_0_6357" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[A non-dry build would build project '{0}']]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Build nedodržující princip DRY by vytvořil projekt {0}.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";A_non_dry_build_would_delete_the_following_files_Colon_0_6356" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[A non-dry build would delete the following files: {0}]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Build nedodržující princip DRY by odstranil následující soubory: {0}]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation_2371" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A parameter initializer is only allowed in a function or constructor implementation.]]></Val>
@@ -957,6 +975,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Add_braces_to_arrow_function_95059" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Add braces to arrow function]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Přidat složené závorky k funkci šipky]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Add_definite_assignment_assertion_to_property_0_95020" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Add definite assignment assertion to property '{0}']]></Val>
@@ -1026,6 +1053,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Add_or_remove_braces_in_an_arrow_function_95058" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Add or remove braces in an arrow function]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Přidat nebo odebrat složené závorky ve funkci šipky]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Add_qualifier_to_all_unresolved_variables_matching_a_member_name_95037" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Add qualifier to all unresolved variables matching a member name]]></Val>
@@ -1767,6 +1803,33 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Build_all_projects_including_those_that_appear_to_be_up_to_date_6368" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Build all projects, including those that appear to be up to date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Sestavit všechny projekty včetně těch, které se zdají aktuální]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Build_one_or_more_projects_and_their_dependencies_if_out_of_date_6364" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Build one or more projects and their dependencies, if out of date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Sestavit jeden nebo více projektů a jejich závislosti, pokud jsou zastaralé]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Building_project_0_6358" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Building project '{0}'...]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Sestavuje se projekt {0}...]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Call_decorator_expression_90028" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Call decorator expression]]></Val>
@@ -2841,6 +2904,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Delete_the_outputs_of_all_projects_6365" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Delete the outputs of all projects]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Odstranit výstupy všech projektů]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Deprecated_Use_jsxFactory_instead_Specify_the_object_invoked_for_createElement_when_targeting_react__6084" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[[Deprecated]5D; Use '--jsxFactory' instead. Specify the object invoked for createElement when targeting 'react' JSX emit]]></Val>
@@ -3297,6 +3369,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Enable_verbose_logging_6366" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Enable verbose logging]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Povolit podrobné protokolování]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Enables_emit_interoperability_between_CommonJS_and_ES_Modules_via_creation_of_namespace_objects_for__7037" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'.]]></Val>
@@ -5724,6 +5805,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Option_build_must_be_the_first_command_line_argument_6369" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Option '--build' must be the first command line argument.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Možnost --build musí být prvním argumentem příkazového řádku.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES_5047" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Option 'isolatedModules' can only be used when either option '--module' is provided or option 'target' is 'ES2015' or higher.]]></Val>
@@ -5760,6 +5850,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Options_0_and_1_cannot_be_combined_6370" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Options '{0}' and '{1}' cannot be combined.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Možnosti {0} a {1} nejde kombinovat.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Options_Colon_6027" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Options:]]></Val>
@@ -6192,6 +6291,69 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Project_0_can_t_be_built_because_its_dependency_1_has_errors_6363" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Project '{0}' can't be built because its dependency '{1}' has errors]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Projekt {0} nejde sestavit, protože jeho závislost {1} obsahuje chyby.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Project_0_is_out_of_date_because_its_dependency_1_is_out_of_date_6353" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Project '{0}' is out of date because its dependency '{1}' is out of date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Projekt {0} je zastaralý, protože jeho závislost {1} je zastaralá.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Project_0_is_out_of_date_because_oldest_output_1_is_older_than_newest_input_2_6350" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Project '{0}' is out of date because oldest output '{1}' is older than newest input '{2}']]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Projekt {0} je zastaralý, protože nejstarší výstup {1} je starší než nejnovější vstup {2}.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Project_0_is_out_of_date_because_output_file_1_does_not_exist_6352" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Project '{0}' is out of date because output file '{1}' does not exist]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Projekt {0} je zastaralý, protože výstupní soubor {1} neexistuje.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Project_0_is_up_to_date_6361" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Project '{0}' is up to date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Projekt {0} je aktuální.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Project_0_is_up_to_date_because_newest_input_1_is_older_than_oldest_output_2_6351" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Project '{0}' is up to date because newest input '{1}' is older than oldest output '{2}']]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Projekt {0} je aktuální, protože nejnovější vstup {1} je starší než nejstarší výstup {2}.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Project_0_is_up_to_date_with_d_ts_files_from_its_dependencies_6354" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Project '{0}' is up to date with .d.ts files from its dependencies]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Projekt {0} je aktualizovaný soubory .d.ts z jeho závislostí.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Project_references_may_not_form_a_circular_graph_Cycle_detected_Colon_0_6202" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project references may not form a circular graph. Cycle detected: {0}]]></Val>
@@ -6201,6 +6363,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Projects_in_this_build_Colon_0_6355" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Projects in this build: {0}]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Projekty v tomto sestavení: {0}]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Projects_to_reference_6300" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Projects to reference]]></Val>
@@ -6663,6 +6834,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Remove_braces_from_arrow_function_95060" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Remove braces from arrow function]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Odebrat složené závorky z funkce šipky]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Remove_declaration_for_Colon_0_90004" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Remove declaration for: '{0}']]></Val>
@@ -7236,6 +7416,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Show_what_would_be_built_or_deleted_if_specified_with_clean_6367" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Show what would be built (or deleted, if specified with '--clean')]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Zobrazit, co by se sestavilo (nebo odstranilo, pokud je zadaná možnost --clean)]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Signature_0_must_be_a_type_predicate_1224" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Signature '{0}' must be a type predicate.]]></Val>
@@ -7254,6 +7443,24 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Skipping_build_of_project_0_because_its_dependency_1_has_errors_6362" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Skipping build of project '{0}' because its dependency '{1}' has errors]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Sestavení projektu {0} se přeskakuje, protože jeho závislost {1} obsahuje chyby.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Skipping_clean_because_not_all_projects_could_be_located_6371" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Skipping clean because not all projects could be located]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Vyčištění se přeskakuje, protože některé projekty se nepodařilo najít.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Source_Map_Options_6175" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Source Map Options]]></Val>
@@ -8862,6 +9069,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Updating_output_timestamps_of_project_0_6359" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Updating output timestamps of project '{0}'...]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Aktualizují se výstupní časová razítka projektu {0}...]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Use_synthetic_default_member_95016" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Use synthetic 'default' member.]]></Val>
@@ -9411,6 +9627,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";delete_this_Project_0_is_up_to_date_because_it_was_previously_built_6360" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[delete this - Project '{0}' is up to date because it was previously built]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[odstranit toto – projekt {0} je aktuální, protože byl sestaven dříve]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";enum_declarations_can_only_be_used_in_a_ts_file_8015" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA['enum declarations' can only be used in a .ts file.]]></Val>
diff --git a/src/loc/lcl/deu/diagnosticMessages/diagnosticMessages.generated.json.lcl b/src/loc/lcl/deu/diagnosticMessages/diagnosticMessages.generated.json.lcl
index 2a1883d8c1e22..0ff080e40e246 100644
--- a/src/loc/lcl/deu/diagnosticMessages/diagnosticMessages.generated.json.lcl
+++ b/src/loc/lcl/deu/diagnosticMessages/diagnosticMessages.generated.json.lcl
@@ -486,12 +486,18 @@
       <Item ItemId=";A_non_dry_build_would_build_project_0_6357" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A non-dry build would build project '{0}']]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Bei einem echten Build würde das Projekt "{0}" erstellt.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_non_dry_build_would_delete_the_following_files_Colon_0_6356" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A non-dry build would delete the following files: {0}]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Bei einem echten Build würden die folgenden Dateien gelöscht: {0}]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -957,6 +963,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Add_braces_to_arrow_function_95059" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Add braces to arrow function]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Geschweifte Klammern zu Pfeilfunktion hinzufügen]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Add_definite_assignment_assertion_to_property_0_95020" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Add definite assignment assertion to property '{0}']]></Val>
@@ -1026,6 +1041,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Add_or_remove_braces_in_an_arrow_function_95058" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Add or remove braces in an arrow function]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Geschweifte Klammern zu einer Pfeilfunktion hinzufügen oder daraus entfernen]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Add_qualifier_to_all_unresolved_variables_matching_a_member_name_95037" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Add qualifier to all unresolved variables matching a member name]]></Val>
@@ -1770,18 +1794,27 @@
       <Item ItemId=";Build_all_projects_including_those_that_appear_to_be_up_to_date_6368" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Build all projects, including those that appear to be up to date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Alle Projekte erstellen, einschließlich solcher, die anscheinend auf dem neuesten Stand sind]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Build_one_or_more_projects_and_their_dependencies_if_out_of_date_6364" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Build one or more projects and their dependencies, if out of date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Mindestens ein Projekt und die zugehörigen Abhängigkeiten erstellen, wenn veraltet]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Building_project_0_6358" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Building project '{0}'...]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Projekt "{0}" wird erstellt...]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -2862,6 +2895,9 @@
       <Item ItemId=";Delete_the_outputs_of_all_projects_6365" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Delete the outputs of all projects]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Ausgaben aller Projekte löschen]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -3324,6 +3360,9 @@
       <Item ItemId=";Enable_verbose_logging_6366" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Enable verbose logging]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Ausführliche Protokollierung aktivieren]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -5757,6 +5796,9 @@
       <Item ItemId=";Option_build_must_be_the_first_command_line_argument_6369" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Option '--build' must be the first command line argument.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Die Option "--build" muss das erste Befehlszeilenargument sein.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -5799,6 +5841,9 @@
       <Item ItemId=";Options_0_and_1_cannot_be_combined_6370" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Options '{0}' and '{1}' cannot be combined.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Die Optionen "{0}" und "{1}" können nicht kombiniert werden.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6234,42 +6279,63 @@
       <Item ItemId=";Project_0_can_t_be_built_because_its_dependency_1_has_errors_6363" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' can't be built because its dependency '{1}' has errors]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Projekt "{0}" kann nicht erstellt werden, weil die Abhängigkeit "{1}" Fehler enthält.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_out_of_date_because_its_dependency_1_is_out_of_date_6353" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is out of date because its dependency '{1}' is out of date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Projekt "{0}" ist veraltet, weil die Abhängigkeit "{1}" veraltet ist.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_out_of_date_because_oldest_output_1_is_older_than_newest_input_2_6350" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is out of date because oldest output '{1}' is older than newest input '{2}']]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Projekt "{0}" ist veraltet, weil die älteste Ausgabe "{1}" älter ist als die neueste Eingabe "{2}".]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_out_of_date_because_output_file_1_does_not_exist_6352" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is out of date because output file '{1}' does not exist]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Projekt "{0}" ist veraltet, weil die Ausgabedatei "{1}" nicht vorhanden ist.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_up_to_date_6361" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is up to date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Projekt "{0}" ist auf dem neuesten Stand.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_up_to_date_because_newest_input_1_is_older_than_oldest_output_2_6351" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is up to date because newest input '{1}' is older than oldest output '{2}']]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Projekt "{0}" ist auf dem neuesten Stand, weil die neueste Eingabe "{1}" älter ist als die älteste Ausgabe "{2}".]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_up_to_date_with_d_ts_files_from_its_dependencies_6354" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is up to date with .d.ts files from its dependencies]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Projekt "{0}" ist mit .d.ts-Dateien aus den zugehörigen Abhängigkeiten auf dem neuesten Stand.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6285,6 +6351,9 @@
       <Item ItemId=";Projects_in_this_build_Colon_0_6355" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Projects in this build: {0}]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Projekte in diesem Build: {0}]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6750,6 +6819,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Remove_braces_from_arrow_function_95060" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Remove braces from arrow function]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Geschweifte Klammern aus Pfeilfunktion entfernen]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Remove_declaration_for_Colon_0_90004" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Remove declaration for: '{0}']]></Val>
@@ -7326,6 +7404,9 @@
       <Item ItemId=";Show_what_would_be_built_or_deleted_if_specified_with_clean_6367" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Show what would be built (or deleted, if specified with '--clean')]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Anzeigen, was erstellt würde (oder gelöscht würde, wenn mit "--clean" angegeben)]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -7350,12 +7431,18 @@
       <Item ItemId=";Skipping_build_of_project_0_because_its_dependency_1_has_errors_6362" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Skipping build of project '{0}' because its dependency '{1}' has errors]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Das Erstellen von Projekt "{0}" wird übersprungen, weil die Abhängigkeit "{1}" einen Fehler aufweist.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Skipping_clean_because_not_all_projects_could_be_located_6371" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Skipping clean because not all projects could be located]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Das Bereinigen wird übersprungen, weil nicht alle Projekte gefunden werden konnten.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -8970,6 +9057,9 @@
       <Item ItemId=";Updating_output_timestamps_of_project_0_6359" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Updating output timestamps of project '{0}'...]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Ausgabezeitstempel von Projekt "{0}" werden aktualisiert...]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -9525,6 +9615,9 @@
       <Item ItemId=";delete_this_Project_0_is_up_to_date_because_it_was_previously_built_6360" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[delete this - Project '{0}' is up to date because it was previously built]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Dies löschen – Projekt "{0}" ist auf dem neuesten Stand, da es bereits zuvor erstellt wurde]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
diff --git a/src/loc/lcl/esn/diagnosticMessages/diagnosticMessages.generated.json.lcl b/src/loc/lcl/esn/diagnosticMessages/diagnosticMessages.generated.json.lcl
index f723f786b333c..6d74aac015d58 100644
--- a/src/loc/lcl/esn/diagnosticMessages/diagnosticMessages.generated.json.lcl
+++ b/src/loc/lcl/esn/diagnosticMessages/diagnosticMessages.generated.json.lcl
@@ -495,12 +495,18 @@
       <Item ItemId=";A_non_dry_build_would_build_project_0_6357" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A non-dry build would build project '{0}']]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Una compilación no DRY compilaría el proyecto "{0}"]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_non_dry_build_would_delete_the_following_files_Colon_0_6356" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A non-dry build would delete the following files: {0}]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Una compilación no DRY eliminaría los siguientes archivos: {0}]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -969,6 +975,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Add_braces_to_arrow_function_95059" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Add braces to arrow function]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Agregar llaves a la función de flecha]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Add_definite_assignment_assertion_to_property_0_95020" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Add definite assignment assertion to property '{0}']]></Val>
@@ -1041,6 +1056,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Add_or_remove_braces_in_an_arrow_function_95058" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Add or remove braces in an arrow function]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Agregar o quitar llaves en una función de flecha]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Add_qualifier_to_all_unresolved_variables_matching_a_member_name_95037" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Add qualifier to all unresolved variables matching a member name]]></Val>
@@ -1785,18 +1809,27 @@
       <Item ItemId=";Build_all_projects_including_those_that_appear_to_be_up_to_date_6368" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Build all projects, including those that appear to be up to date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Compilar todos los proyectos, incluidos los que aparecen actualizados]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Build_one_or_more_projects_and_their_dependencies_if_out_of_date_6364" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Build one or more projects and their dependencies, if out of date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Generar uno o varios proyectos y sus dependencias, si no están actualizados]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Building_project_0_6358" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Building project '{0}'...]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Compilando el proyecto "{0}"...]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -2877,6 +2910,9 @@
       <Item ItemId=";Delete_the_outputs_of_all_projects_6365" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Delete the outputs of all projects]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Eliminar las salidas de todos los proyectos]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -3339,6 +3375,9 @@
       <Item ItemId=";Enable_verbose_logging_6366" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Enable verbose logging]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Habilitar el registro detallado]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -5772,6 +5811,9 @@
       <Item ItemId=";Option_build_must_be_the_first_command_line_argument_6369" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Option '--build' must be the first command line argument.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[La opción "--build" debe ser el primer argumento de la línea de comandos.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -5814,6 +5856,9 @@
       <Item ItemId=";Options_0_and_1_cannot_be_combined_6370" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Options '{0}' and '{1}' cannot be combined.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA["{0}" y "{1}" no se pueden combinar.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6252,42 +6297,63 @@
       <Item ItemId=";Project_0_can_t_be_built_because_its_dependency_1_has_errors_6363" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' can't be built because its dependency '{1}' has errors]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[El proyecto "{0}" no puede generarse porque su dependencia "{1}" tiene errores]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_out_of_date_because_its_dependency_1_is_out_of_date_6353" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is out of date because its dependency '{1}' is out of date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[El proyecto "{0}" está obsoleto porque su dependencia "{1}" no está actualizada]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_out_of_date_because_oldest_output_1_is_older_than_newest_input_2_6350" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is out of date because oldest output '{1}' is older than newest input '{2}']]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[El proyecto "{0}" está obsoleto porque la salida más antigua "{1}" es anterior a la entrada más reciente "{2}"]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_out_of_date_because_output_file_1_does_not_exist_6352" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is out of date because output file '{1}' does not exist]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[El proyecto "{0}" está obsoleto porque el archivo de salida "{1}" no existe]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_up_to_date_6361" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is up to date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[El proyecto "{0}" está actualizado]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_up_to_date_because_newest_input_1_is_older_than_oldest_output_2_6351" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is up to date because newest input '{1}' is older than oldest output '{2}']]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[El proyecto "{0}" está actualizado porque la entrada más reciente "{1}" es anterior a la salida más antigua "{2}"]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_up_to_date_with_d_ts_files_from_its_dependencies_6354" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is up to date with .d.ts files from its dependencies]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[El proyecto "{0}" está actualizado con archivos .d.ts de sus dependencias]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6303,6 +6369,9 @@
       <Item ItemId=";Projects_in_this_build_Colon_0_6355" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Projects in this build: {0}]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Proyectos de esta compilación: {0}]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6768,6 +6837,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Remove_braces_from_arrow_function_95060" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Remove braces from arrow function]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Quitar las llaves de la función de flecha]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Remove_declaration_for_Colon_0_90004" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Remove declaration for: '{0}']]></Val>
@@ -7344,6 +7422,9 @@
       <Item ItemId=";Show_what_would_be_built_or_deleted_if_specified_with_clean_6367" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Show what would be built (or deleted, if specified with '--clean')]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Mostrar lo que podría compilarse (o eliminarse, si se especifica con "--clean")]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -7368,12 +7449,18 @@
       <Item ItemId=";Skipping_build_of_project_0_because_its_dependency_1_has_errors_6362" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Skipping build of project '{0}' because its dependency '{1}' has errors]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Omitiendo la compilación del proyecto "{0}" porque su dependencia "{1}" tiene errores]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Skipping_clean_because_not_all_projects_could_be_located_6371" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Skipping clean because not all projects could be located]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Omitiendo la limpieza porque no se encontraron todos los proyectos]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -8988,6 +9075,9 @@
       <Item ItemId=";Updating_output_timestamps_of_project_0_6359" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Updating output timestamps of project '{0}'...]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Actualizando las marcas de hora de salida del proyecto "{0}"...]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -9543,6 +9633,9 @@
       <Item ItemId=";delete_this_Project_0_is_up_to_date_because_it_was_previously_built_6360" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[delete this - Project '{0}' is up to date because it was previously built]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[eliminar esto - El proyecto "{0}" está actualizado porque se compiló previamente]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
diff --git a/src/loc/lcl/fra/diagnosticMessages/diagnosticMessages.generated.json.lcl b/src/loc/lcl/fra/diagnosticMessages/diagnosticMessages.generated.json.lcl
index 8abfd535e1c0f..9a22a234a89db 100644
--- a/src/loc/lcl/fra/diagnosticMessages/diagnosticMessages.generated.json.lcl
+++ b/src/loc/lcl/fra/diagnosticMessages/diagnosticMessages.generated.json.lcl
@@ -495,12 +495,18 @@
       <Item ItemId=";A_non_dry_build_would_build_project_0_6357" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A non-dry build would build project '{0}']]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Une build non-DRY générerait le projet '{0}']]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_non_dry_build_would_delete_the_following_files_Colon_0_6356" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A non-dry build would delete the following files: {0}]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Une build non-DRY supprimerait les fichiers suivants : {0}]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -969,6 +975,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Add_braces_to_arrow_function_95059" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Add braces to arrow function]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Ajouter des accolades à la fonction arrow]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Add_definite_assignment_assertion_to_property_0_95020" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Add definite assignment assertion to property '{0}']]></Val>
@@ -1041,6 +1056,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Add_or_remove_braces_in_an_arrow_function_95058" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Add or remove braces in an arrow function]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Ajouter ou supprimer les accolades dans une fonction arrow]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Add_qualifier_to_all_unresolved_variables_matching_a_member_name_95037" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Add qualifier to all unresolved variables matching a member name]]></Val>
@@ -1785,18 +1809,27 @@
       <Item ItemId=";Build_all_projects_including_those_that_appear_to_be_up_to_date_6368" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Build all projects, including those that appear to be up to date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Générer tous les projets, même ceux qui semblent être à jour]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Build_one_or_more_projects_and_their_dependencies_if_out_of_date_6364" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Build one or more projects and their dependencies, if out of date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Générer un ou plusieurs projets et leurs dépendances (s'ils sont obsolètes)]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Building_project_0_6358" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Building project '{0}'...]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Génération du projet '{0}'...]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -2877,6 +2910,9 @@
       <Item ItemId=";Delete_the_outputs_of_all_projects_6365" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Delete the outputs of all projects]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Supprimer les sorties de tous les projets]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -3339,6 +3375,9 @@
       <Item ItemId=";Enable_verbose_logging_6366" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Enable verbose logging]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Activer la journalisation détaillée]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -5772,6 +5811,9 @@
       <Item ItemId=";Option_build_must_be_the_first_command_line_argument_6369" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Option '--build' must be the first command line argument.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[L'option '--build' doit être le premier argument de ligne de commande.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -5814,6 +5856,9 @@
       <Item ItemId=";Options_0_and_1_cannot_be_combined_6370" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Options '{0}' and '{1}' cannot be combined.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Impossible de combiner les options '{0}' et '{1}'.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6252,42 +6297,63 @@
       <Item ItemId=";Project_0_can_t_be_built_because_its_dependency_1_has_errors_6363" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' can't be built because its dependency '{1}' has errors]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Impossible de générer le projet '{0}' car sa dépendance '{1}' comporte des erreurs]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_out_of_date_because_its_dependency_1_is_out_of_date_6353" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is out of date because its dependency '{1}' is out of date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Le projet '{0}' est obsolète car sa dépendance '{1}' est obsolète]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_out_of_date_because_oldest_output_1_is_older_than_newest_input_2_6350" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is out of date because oldest output '{1}' is older than newest input '{2}']]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Le projet '{0}' est obsolète car la sortie la plus ancienne ('{1}') est antérieure à l'entrée la plus récente '{2}']]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_out_of_date_because_output_file_1_does_not_exist_6352" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is out of date because output file '{1}' does not exist]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Le projet '{0}' est obsolète car le fichier de sortie '{1}' n'existe pas]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_up_to_date_6361" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is up to date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Le projet '{0}' est à jour]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_up_to_date_because_newest_input_1_is_older_than_oldest_output_2_6351" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is up to date because newest input '{1}' is older than oldest output '{2}']]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Le projet '{0}' est à jour car l'entrée la plus récente ('{1}') est antérieure à la sortie la plus ancienne ('{2}')]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_up_to_date_with_d_ts_files_from_its_dependencies_6354" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is up to date with .d.ts files from its dependencies]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Le projet '{0}' est à jour avec les fichiers .d.ts de ses dépendances]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6303,6 +6369,9 @@
       <Item ItemId=";Projects_in_this_build_Colon_0_6355" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Projects in this build: {0}]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Projets dans cette build : {0}]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6768,6 +6837,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Remove_braces_from_arrow_function_95060" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Remove braces from arrow function]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Supprimer les accolades de la fonction arrow]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Remove_declaration_for_Colon_0_90004" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Remove declaration for: '{0}']]></Val>
@@ -7344,6 +7422,9 @@
       <Item ItemId=";Show_what_would_be_built_or_deleted_if_specified_with_clean_6367" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Show what would be built (or deleted, if specified with '--clean')]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Montrer ce qui serait généré (ou supprimé si '--clean' est spécifié)]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -7368,12 +7449,18 @@
       <Item ItemId=";Skipping_build_of_project_0_because_its_dependency_1_has_errors_6362" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Skipping build of project '{0}' because its dependency '{1}' has errors]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Ignorer la génération du projet '{0}' car sa dépendance '{1}' comporte des erreurs]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Skipping_clean_because_not_all_projects_could_be_located_6371" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Skipping clean because not all projects could be located]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Ignorer le nettoyage car tous les projets ne peuvent pas être localisés]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -8988,6 +9075,9 @@
       <Item ItemId=";Updating_output_timestamps_of_project_0_6359" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Updating output timestamps of project '{0}'...]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Mise à jour des horodatages de sortie du projet '{0}'...]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -9543,6 +9633,9 @@
       <Item ItemId=";delete_this_Project_0_is_up_to_date_because_it_was_previously_built_6360" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[delete this - Project '{0}' is up to date because it was previously built]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[supprimer ceci - Le projet '{0}' est à jour car il a déjà été généré]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
diff --git a/src/loc/lcl/ita/diagnosticMessages/diagnosticMessages.generated.json.lcl b/src/loc/lcl/ita/diagnosticMessages/diagnosticMessages.generated.json.lcl
index 5c8c80e51d267..6cbf3d5f068a4 100644
--- a/src/loc/lcl/ita/diagnosticMessages/diagnosticMessages.generated.json.lcl
+++ b/src/loc/lcl/ita/diagnosticMessages/diagnosticMessages.generated.json.lcl
@@ -483,6 +483,24 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";A_non_dry_build_would_build_project_0_6357" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[A non-dry build would build project '{0}']]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Se si esegue una compilazione non di prova, verrà compilato il progetto '{0}']]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";A_non_dry_build_would_delete_the_following_files_Colon_0_6356" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[A non-dry build would delete the following files: {0}]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Se si esegue una compilazione non di prova, i file seguenti verranno eliminati: {0}]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation_2371" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A parameter initializer is only allowed in a function or constructor implementation.]]></Val>
@@ -948,6 +966,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Add_braces_to_arrow_function_95059" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Add braces to arrow function]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Aggiungere le parentesi graffe alla funzione arrow]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Add_definite_assignment_assertion_to_property_0_95020" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Add definite assignment assertion to property '{0}']]></Val>
@@ -1017,6 +1044,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Add_or_remove_braces_in_an_arrow_function_95058" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Add or remove braces in an arrow function]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Aggiungere o rimuovere le parentesi graffe in una funzione arrow]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Add_qualifier_to_all_unresolved_variables_matching_a_member_name_95037" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Add qualifier to all unresolved variables matching a member name]]></Val>
@@ -1758,6 +1794,33 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Build_all_projects_including_those_that_appear_to_be_up_to_date_6368" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Build all projects, including those that appear to be up to date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Compilare tutti i progetti, anche quelli che sembrano aggiornati]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Build_one_or_more_projects_and_their_dependencies_if_out_of_date_6364" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Build one or more projects and their dependencies, if out of date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Compilare uno o più progetti e le relative dipendenze, se non aggiornate]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Building_project_0_6358" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Building project '{0}'...]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Compilazione del progetto '{0}'...]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Call_decorator_expression_90028" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Call decorator expression]]></Val>
@@ -2832,6 +2895,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Delete_the_outputs_of_all_projects_6365" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Delete the outputs of all projects]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Eliminare gli output di tutti i progetti]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Deprecated_Use_jsxFactory_instead_Specify_the_object_invoked_for_createElement_when_targeting_react__6084" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[[Deprecated]5D; Use '--jsxFactory' instead. Specify the object invoked for createElement when targeting 'react' JSX emit]]></Val>
@@ -3288,6 +3360,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Enable_verbose_logging_6366" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Enable verbose logging]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Abilitare la registrazione dettagliata]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Enables_emit_interoperability_between_CommonJS_and_ES_Modules_via_creation_of_namespace_objects_for__7037" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'.]]></Val>
@@ -5715,6 +5796,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Option_build_must_be_the_first_command_line_argument_6369" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Option '--build' must be the first command line argument.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[L'opzione '--build' deve essere il primo argomento della riga di comando.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES_5047" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Option 'isolatedModules' can only be used when either option '--module' is provided or option 'target' is 'ES2015' or higher.]]></Val>
@@ -5751,6 +5841,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Options_0_and_1_cannot_be_combined_6370" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Options '{0}' and '{1}' cannot be combined.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Non è possibile combinare le opzioni '{0}' e '{1}'.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Options_Colon_6027" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Options:]]></Val>
@@ -6183,6 +6282,69 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Project_0_can_t_be_built_because_its_dependency_1_has_errors_6363" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Project '{0}' can't be built because its dependency '{1}' has errors]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Non è possibile compilare il progetto '{0}' perché la dipendenza '{1}' contiene errori]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Project_0_is_out_of_date_because_its_dependency_1_is_out_of_date_6353" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Project '{0}' is out of date because its dependency '{1}' is out of date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Il progetto '{0}' non è aggiornato perché la dipendenza '{1}' non è aggiornata]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Project_0_is_out_of_date_because_oldest_output_1_is_older_than_newest_input_2_6350" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Project '{0}' is out of date because oldest output '{1}' is older than newest input '{2}']]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Il progetto '{0}' non è aggiornato perché l'output meno recente '{1}' è meno recente dell'input più recente '{2}']]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Project_0_is_out_of_date_because_output_file_1_does_not_exist_6352" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Project '{0}' is out of date because output file '{1}' does not exist]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Il progetto '{0}' non è aggiornato perché il file di output '{1}' non esiste]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Project_0_is_up_to_date_6361" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Project '{0}' is up to date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Il progetto '{0}' è aggiornato]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Project_0_is_up_to_date_because_newest_input_1_is_older_than_oldest_output_2_6351" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Project '{0}' is up to date because newest input '{1}' is older than oldest output '{2}']]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Il progetto '{0}' è aggiornato perché l'input più recente '{1}' è meno recente dell'output meno recente '{2}']]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Project_0_is_up_to_date_with_d_ts_files_from_its_dependencies_6354" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Project '{0}' is up to date with .d.ts files from its dependencies]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Il progetto '{0}' è aggiornato con i file con estensione d.ts delle relative dipendenze]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Project_references_may_not_form_a_circular_graph_Cycle_detected_Colon_0_6202" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project references may not form a circular graph. Cycle detected: {0}]]></Val>
@@ -6192,6 +6354,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Projects_in_this_build_Colon_0_6355" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Projects in this build: {0}]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Progetti in questa compilazione: {0}]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Projects_to_reference_6300" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Projects to reference]]></Val>
@@ -6654,6 +6825,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Remove_braces_from_arrow_function_95060" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Remove braces from arrow function]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Rimuovere le parentesi graffe dalla funzione arrow]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Remove_declaration_for_Colon_0_90004" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Remove declaration for: '{0}']]></Val>
@@ -7227,6 +7407,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Show_what_would_be_built_or_deleted_if_specified_with_clean_6367" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Show what would be built (or deleted, if specified with '--clean')]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Mostra gli elementi che vengono compilati (o eliminati, se specificati con l'opzione '--clean')]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Signature_0_must_be_a_type_predicate_1224" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Signature '{0}' must be a type predicate.]]></Val>
@@ -7245,6 +7434,24 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Skipping_build_of_project_0_because_its_dependency_1_has_errors_6362" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Skipping build of project '{0}' because its dependency '{1}' has errors]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[La compilazione del progetto '{0}' verrà ignorata perché la dipendenza '{1}' contiene errori]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Skipping_clean_because_not_all_projects_could_be_located_6371" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Skipping clean because not all projects could be located]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[La pulizia verrà ignorata perché non è stato possibile individuare tutti i progetti]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Source_Map_Options_6175" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Source Map Options]]></Val>
@@ -8853,6 +9060,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Updating_output_timestamps_of_project_0_6359" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Updating output timestamps of project '{0}'...]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Aggiornamento dei timestamp di output del progetto '{0}'...]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Use_synthetic_default_member_95016" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Use synthetic 'default' member.]]></Val>
@@ -9402,6 +9618,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";delete_this_Project_0_is_up_to_date_because_it_was_previously_built_6360" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[delete this - Project '{0}' is up to date because it was previously built]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[eliminare - Il progetto '{0}' è aggiornato perché è stato compilato in precedenza]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";enum_declarations_can_only_be_used_in_a_ts_file_8015" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA['enum declarations' can only be used in a .ts file.]]></Val>
diff --git a/src/loc/lcl/jpn/diagnosticMessages/diagnosticMessages.generated.json.lcl b/src/loc/lcl/jpn/diagnosticMessages/diagnosticMessages.generated.json.lcl
index e77d6f627be52..53d9f2536064a 100644
--- a/src/loc/lcl/jpn/diagnosticMessages/diagnosticMessages.generated.json.lcl
+++ b/src/loc/lcl/jpn/diagnosticMessages/diagnosticMessages.generated.json.lcl
@@ -486,12 +486,18 @@
       <Item ItemId=";A_non_dry_build_would_build_project_0_6357" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A non-dry build would build project '{0}']]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[非ドライ ビルドはプロジェクト '{0}' をビルドします]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_non_dry_build_would_delete_the_following_files_Colon_0_6356" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A non-dry build would delete the following files: {0}]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[非ドライ ビルドは、次のファイルを削除します: {0}]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -960,6 +966,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Add_braces_to_arrow_function_95059" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Add braces to arrow function]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[アロー関数に中かっこを追加します]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Add_definite_assignment_assertion_to_property_0_95020" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Add definite assignment assertion to property '{0}']]></Val>
@@ -1029,6 +1044,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Add_or_remove_braces_in_an_arrow_function_95058" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Add or remove braces in an arrow function]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[アロー関数内の中かっこを追加または削除します]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Add_qualifier_to_all_unresolved_variables_matching_a_member_name_95037" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Add qualifier to all unresolved variables matching a member name]]></Val>
@@ -1773,18 +1797,27 @@
       <Item ItemId=";Build_all_projects_including_those_that_appear_to_be_up_to_date_6368" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Build all projects, including those that appear to be up to date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[最新の状態であると思われるものを含むすべてのプロジェクトをビルドします]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Build_one_or_more_projects_and_their_dependencies_if_out_of_date_6364" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Build one or more projects and their dependencies, if out of date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[最新でない場合は、1 つ以上のプロジェクトとその依存関係をビルドします]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Building_project_0_6358" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Building project '{0}'...]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[プロジェクト "{0}" をビルドしています...]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -2865,6 +2898,9 @@
       <Item ItemId=";Delete_the_outputs_of_all_projects_6365" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Delete the outputs of all projects]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[すべてのプロジェクトの出力を削除します]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -3327,6 +3363,9 @@
       <Item ItemId=";Enable_verbose_logging_6366" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Enable verbose logging]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[詳細ログを有効にします]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -5760,6 +5799,9 @@
       <Item ItemId=";Option_build_must_be_the_first_command_line_argument_6369" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Option '--build' must be the first command line argument.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[オプション '--build' は最初のコマンド ライン引数である必要があります。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -5802,6 +5844,9 @@
       <Item ItemId=";Options_0_and_1_cannot_be_combined_6370" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Options '{0}' and '{1}' cannot be combined.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[オプション '{0}' と '{1}' を組み合わせることはできません。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6240,42 +6285,63 @@
       <Item ItemId=";Project_0_can_t_be_built_because_its_dependency_1_has_errors_6363" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' can't be built because its dependency '{1}' has errors]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[プロジェクト '{0}' はその依存関係 '{1}' にエラーがあるためビルドできません]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_out_of_date_because_its_dependency_1_is_out_of_date_6353" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is out of date because its dependency '{1}' is out of date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[プロジェクト '{0}' はその依存関係 '{1}' が古いため最新の状態ではありません]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_out_of_date_because_oldest_output_1_is_older_than_newest_input_2_6350" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is out of date because oldest output '{1}' is older than newest input '{2}']]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[プロジェクト '{0}' は最も古い出力 '{1}' が最新の入力 '{2}' より古いため最新の状態ではありません]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_out_of_date_because_output_file_1_does_not_exist_6352" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is out of date because output file '{1}' does not exist]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[プロジェクト '{0}' は出力ファイル '{1}' が存在しないため最新の状態ではありません]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_up_to_date_6361" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is up to date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[プロジェクト '{0}' は最新の状態です]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_up_to_date_because_newest_input_1_is_older_than_oldest_output_2_6351" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is up to date because newest input '{1}' is older than oldest output '{2}']]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[プロジェクト '{0}' は最新の入力 '{1}' が最も古い出力 '{2}' より古いため最新の状態です]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_up_to_date_with_d_ts_files_from_its_dependencies_6354" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is up to date with .d.ts files from its dependencies]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[プロジェクト '{0}' はその依存関係からの .d.ts ファイルで最新の状態です]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6291,6 +6357,9 @@
       <Item ItemId=";Projects_in_this_build_Colon_0_6355" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Projects in this build: {0}]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[このビルドのプロジェクト: {0}]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6756,6 +6825,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Remove_braces_from_arrow_function_95060" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Remove braces from arrow function]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[アロー関数から中かっこを削除します]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Remove_declaration_for_Colon_0_90004" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Remove declaration for: '{0}']]></Val>
@@ -7332,6 +7410,9 @@
       <Item ItemId=";Show_what_would_be_built_or_deleted_if_specified_with_clean_6367" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Show what would be built (or deleted, if specified with '--clean')]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[ビルドされる (または '--clean' で指定される場合は、削除される) 内容を表示する]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -7356,12 +7437,18 @@
       <Item ItemId=";Skipping_build_of_project_0_because_its_dependency_1_has_errors_6362" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Skipping build of project '{0}' because its dependency '{1}' has errors]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[プロジェクト '{0}' のビルドは、その依存関係 '{1}' にエラーがあるため、スキップしています]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Skipping_clean_because_not_all_projects_could_be_located_6371" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Skipping clean because not all projects could be located]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[一部のプロジェクトが見つからなかったためクリーンをスキップしています]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -8976,6 +9063,9 @@
       <Item ItemId=";Updating_output_timestamps_of_project_0_6359" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Updating output timestamps of project '{0}'...]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[プロジェクト '{0}' の出力タイムスタンプを更新しています...]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -9531,6 +9621,9 @@
       <Item ItemId=";delete_this_Project_0_is_up_to_date_because_it_was_previously_built_6360" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[delete this - Project '{0}' is up to date because it was previously built]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[これを削除します - プロジェクト '{0}' は、以前にビルドされているため、最新の状態です]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
diff --git a/src/loc/lcl/kor/diagnosticMessages/diagnosticMessages.generated.json.lcl b/src/loc/lcl/kor/diagnosticMessages/diagnosticMessages.generated.json.lcl
index 44a886375aca3..e3d5959f0c710 100644
--- a/src/loc/lcl/kor/diagnosticMessages/diagnosticMessages.generated.json.lcl
+++ b/src/loc/lcl/kor/diagnosticMessages/diagnosticMessages.generated.json.lcl
@@ -486,12 +486,18 @@
       <Item ItemId=";A_non_dry_build_would_build_project_0_6357" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A non-dry build would build project '{0}']]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[DRY가 아닌 빌드는 프로젝트 '{0}'을(를) 빌드합니다.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_non_dry_build_would_delete_the_following_files_Colon_0_6356" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A non-dry build would delete the following files: {0}]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[DRY가 아닌 빌드는 다음 파일을 삭제합니다. {0}]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -960,6 +966,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Add_braces_to_arrow_function_95059" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Add braces to arrow function]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[화살표 함수에 중괄호 추가]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Add_definite_assignment_assertion_to_property_0_95020" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Add definite assignment assertion to property '{0}']]></Val>
@@ -1029,6 +1044,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Add_or_remove_braces_in_an_arrow_function_95058" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Add or remove braces in an arrow function]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[화살표 함수에 중괄호 추가 또는 제거]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Add_qualifier_to_all_unresolved_variables_matching_a_member_name_95037" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Add qualifier to all unresolved variables matching a member name]]></Val>
@@ -1773,18 +1797,27 @@
       <Item ItemId=";Build_all_projects_including_those_that_appear_to_be_up_to_date_6368" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Build all projects, including those that appear to be up to date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[최신 상태로 표시될 프로젝트를 포함하여 모든 프로젝트 빌드]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Build_one_or_more_projects_and_their_dependencies_if_out_of_date_6364" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Build one or more projects and their dependencies, if out of date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[최신 상태가 아닌 경우, 하나 이상의 프로젝트 및 해당 종속성 빌드]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Building_project_0_6358" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Building project '{0}'...]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA['{0}' 프로젝트를 빌드하는 중...]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -2865,6 +2898,9 @@
       <Item ItemId=";Delete_the_outputs_of_all_projects_6365" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Delete the outputs of all projects]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[모든 프로젝트의 출력 삭제]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -3327,6 +3363,9 @@
       <Item ItemId=";Enable_verbose_logging_6366" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Enable verbose logging]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[자세한 정보 로깅 사용]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -5760,6 +5799,9 @@
       <Item ItemId=";Option_build_must_be_the_first_command_line_argument_6369" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Option '--build' must be the first command line argument.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA['--build' 옵션은 첫 번째 명령줄 인수여야 합니다.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -5802,6 +5844,9 @@
       <Item ItemId=";Options_0_and_1_cannot_be_combined_6370" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Options '{0}' and '{1}' cannot be combined.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA['{0}' 및 '{1}' 옵션은 조합할 수 없습니다.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6240,42 +6285,63 @@
       <Item ItemId=";Project_0_can_t_be_built_because_its_dependency_1_has_errors_6363" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' can't be built because its dependency '{1}' has errors]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA['{1}' 종속성에 오류가 있기 때문에 '{0}' 프로젝트를 빌드할 수 없습니다.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_out_of_date_because_its_dependency_1_is_out_of_date_6353" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is out of date because its dependency '{1}' is out of date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA['{1}' 종속성이 최신 상태가 아니기 때문에 '{0}' 프로젝트가 최신 상태가 아닙니다.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_out_of_date_because_oldest_output_1_is_older_than_newest_input_2_6350" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is out of date because oldest output '{1}' is older than newest input '{2}']]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[가장 오래된 출력 '{1}'이(가) 최신 입력 '{2}'보다 오래되었기 때문에 '{0}' 프로젝트가 최신 상태가 아닙니다.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_out_of_date_because_output_file_1_does_not_exist_6352" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is out of date because output file '{1}' does not exist]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA['{1}' 출력 파일이 존재하지 않기 때문에 '{0}' 프로젝트가 최신 상태가 아닙니다.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_up_to_date_6361" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is up to date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA['{0}' 프로젝트가 최신 상태입니다.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_up_to_date_because_newest_input_1_is_older_than_oldest_output_2_6351" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is up to date because newest input '{1}' is older than oldest output '{2}']]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[최신 입력 '{1}'이(가) 가장 오래된 출력 '{2}'보다 오래되었기 때문에 '{0}' 프로젝트가 최신 상태입니다.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_up_to_date_with_d_ts_files_from_its_dependencies_6354" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is up to date with .d.ts files from its dependencies]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[종속성의 .d.ts 파일이 있기 때문에 '{0}' 프로젝트가 최신 상태입니다.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6291,6 +6357,9 @@
       <Item ItemId=";Projects_in_this_build_Colon_0_6355" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Projects in this build: {0}]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[이 빌드의 프로젝트: {0}]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6756,6 +6825,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Remove_braces_from_arrow_function_95060" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Remove braces from arrow function]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[화살표 함수에서 중괄호 제거]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Remove_declaration_for_Colon_0_90004" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Remove declaration for: '{0}']]></Val>
@@ -7332,6 +7410,9 @@
       <Item ItemId=";Show_what_would_be_built_or_deleted_if_specified_with_clean_6367" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Show what would be built (or deleted, if specified with '--clean')]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[빌드될 항목 표시(또는 '--clean'으로 지정된 경우 삭제될 항목 표시)]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -7356,12 +7437,18 @@
       <Item ItemId=";Skipping_build_of_project_0_because_its_dependency_1_has_errors_6362" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Skipping build of project '{0}' because its dependency '{1}' has errors]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA['{1}' 종속성에 오류가 있기 때문에 '{0}' 프로젝트 빌드를 건너뜁니다.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Skipping_clean_because_not_all_projects_could_be_located_6371" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Skipping clean because not all projects could be located]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[일부 프로젝트를 찾을 수 없으므로 정리를 건너뛰는 중입니다.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -8976,6 +9063,9 @@
       <Item ItemId=";Updating_output_timestamps_of_project_0_6359" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Updating output timestamps of project '{0}'...]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA['{0}' 프로젝트의 출력 타임스탬프를 업데이트하는 중...]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -9531,6 +9621,9 @@
       <Item ItemId=";delete_this_Project_0_is_up_to_date_because_it_was_previously_built_6360" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[delete this - Project '{0}' is up to date because it was previously built]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[이 항목 삭제 - '{0}' 프로젝트는 이전에 빌드되었기 때문에 최신 상태입니다.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
diff --git a/src/loc/lcl/plk/diagnosticMessages/diagnosticMessages.generated.json.lcl b/src/loc/lcl/plk/diagnosticMessages/diagnosticMessages.generated.json.lcl
index 5a0220002aab3..43e457e690751 100644
--- a/src/loc/lcl/plk/diagnosticMessages/diagnosticMessages.generated.json.lcl
+++ b/src/loc/lcl/plk/diagnosticMessages/diagnosticMessages.generated.json.lcl
@@ -479,12 +479,18 @@
       <Item ItemId=";A_non_dry_build_would_build_project_0_6357" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A non-dry build would build project '{0}']]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Kompilacja inna niż DRY spowodowałaby skompilowanie projektu „{0}”]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_non_dry_build_would_delete_the_following_files_Colon_0_6356" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A non-dry build would delete the following files: {0}]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Kompilacja inna niż DRY spowodowałaby usunięcie następujących plików: {0}]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -950,6 +956,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Add_braces_to_arrow_function_95059" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Add braces to arrow function]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Dodaj nawiasy klamrowe do funkcji strzałki]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Add_definite_assignment_assertion_to_property_0_95020" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Add definite assignment assertion to property '{0}']]></Val>
@@ -1019,6 +1034,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Add_or_remove_braces_in_an_arrow_function_95058" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Add or remove braces in an arrow function]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Dodaj lub usuń nawiasy klamrowe w funkcji strzałki]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Add_qualifier_to_all_unresolved_variables_matching_a_member_name_95037" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Add qualifier to all unresolved variables matching a member name]]></Val>
@@ -1763,18 +1787,27 @@
       <Item ItemId=";Build_all_projects_including_those_that_appear_to_be_up_to_date_6368" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Build all projects, including those that appear to be up to date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Kompiluj wszystkie projekty, łącznie z tymi, które wydają się być aktualne]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Build_one_or_more_projects_and_their_dependencies_if_out_of_date_6364" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Build one or more projects and their dependencies, if out of date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Kompiluj co najmniej jeden projekt i jego zależności, jeśli są nieaktualne]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Building_project_0_6358" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Building project '{0}'...]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Trwa kompilowanie projektu „{0}”...]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -2855,6 +2888,9 @@
       <Item ItemId=";Delete_the_outputs_of_all_projects_6365" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Delete the outputs of all projects]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Usuń dane wyjściowe wszystkich projektów]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -3317,6 +3353,9 @@
       <Item ItemId=";Enable_verbose_logging_6366" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Enable verbose logging]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Włącz pełne rejestrowanie]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -5750,6 +5789,9 @@
       <Item ItemId=";Option_build_must_be_the_first_command_line_argument_6369" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Option '--build' must be the first command line argument.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Opcja „--build” musi być pierwszym argumentem wiersza polecenia.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -5792,6 +5834,9 @@
       <Item ItemId=";Options_0_and_1_cannot_be_combined_6370" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Options '{0}' and '{1}' cannot be combined.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Nie można połączyć opcji „{0}” i „{1}”.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6227,42 +6272,63 @@
       <Item ItemId=";Project_0_can_t_be_built_because_its_dependency_1_has_errors_6363" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' can't be built because its dependency '{1}' has errors]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Nie można skompilować projektu „{0}”, ponieważ jego zależność „{1}” zawiera błędy]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_out_of_date_because_its_dependency_1_is_out_of_date_6353" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is out of date because its dependency '{1}' is out of date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Projekt „{0}” jest nieaktualny, ponieważ jego zależność „{1}” jest nieaktualna]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_out_of_date_because_oldest_output_1_is_older_than_newest_input_2_6350" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is out of date because oldest output '{1}' is older than newest input '{2}']]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Projekt „{0}” jest nieaktualny, ponieważ najstarsze dane wyjściowe „{1}” są starsze niż najnowsze dane wejściowe „{2}”]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_out_of_date_because_output_file_1_does_not_exist_6352" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is out of date because output file '{1}' does not exist]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Projekt „{0}” jest nieaktualny, ponieważ plik wyjściowy „{1}” nie istnieje]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_up_to_date_6361" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is up to date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Projekt „{0}” jest aktualny]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_up_to_date_because_newest_input_1_is_older_than_oldest_output_2_6351" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is up to date because newest input '{1}' is older than oldest output '{2}']]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Projekt „{0}” jest aktualny, ponieważ najnowsze dane wejściowe „{1}” są starsze niż najstarsze dane wyjściowe „{2}”]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_up_to_date_with_d_ts_files_from_its_dependencies_6354" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is up to date with .d.ts files from its dependencies]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Projekt „{0}” jest aktualny z plikami .d.ts z jego zależności]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6278,6 +6344,9 @@
       <Item ItemId=";Projects_in_this_build_Colon_0_6355" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Projects in this build: {0}]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Projekty w tej kompilacji: {0}]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6743,6 +6812,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Remove_braces_from_arrow_function_95060" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Remove braces from arrow function]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Usuń nawiasy klamrowe z funkcji strzałki]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Remove_declaration_for_Colon_0_90004" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Remove declaration for: '{0}']]></Val>
@@ -7319,6 +7397,9 @@
       <Item ItemId=";Show_what_would_be_built_or_deleted_if_specified_with_clean_6367" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Show what would be built (or deleted, if specified with '--clean')]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Pokaż, co zostanie skompilowane (lub usunięte, jeśli określono opcję „--clean”)]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -7343,12 +7424,18 @@
       <Item ItemId=";Skipping_build_of_project_0_because_its_dependency_1_has_errors_6362" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Skipping build of project '{0}' because its dependency '{1}' has errors]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Pomijanie kompilacji projektu „{0}”, ponieważ jego zależność „{1}” zawiera błędy]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Skipping_clean_because_not_all_projects_could_be_located_6371" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Skipping clean because not all projects could be located]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Pomijanie czyszczenia, ponieważ nie można zlokalizować wszystkich projektów]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -8963,6 +9050,9 @@
       <Item ItemId=";Updating_output_timestamps_of_project_0_6359" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Updating output timestamps of project '{0}'...]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Trwa aktualizowanie sygnatury czasowej danych wyjściowych projektu „{0}”...]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -9518,6 +9608,9 @@
       <Item ItemId=";delete_this_Project_0_is_up_to_date_because_it_was_previously_built_6360" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[delete this - Project '{0}' is up to date because it was previously built]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[usuń to — projekt „{0}” jest aktualny, ponieważ został wcześniej skompilowany]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
diff --git a/src/loc/lcl/ptb/diagnosticMessages/diagnosticMessages.generated.json.lcl b/src/loc/lcl/ptb/diagnosticMessages/diagnosticMessages.generated.json.lcl
index 3d48517da3133..54b82d0468ed4 100644
--- a/src/loc/lcl/ptb/diagnosticMessages/diagnosticMessages.generated.json.lcl
+++ b/src/loc/lcl/ptb/diagnosticMessages/diagnosticMessages.generated.json.lcl
@@ -479,12 +479,18 @@
       <Item ItemId=";A_non_dry_build_would_build_project_0_6357" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A non-dry build would build project '{0}']]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Um build não dry compilaria o projeto '{0}']]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_non_dry_build_would_delete_the_following_files_Colon_0_6356" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A non-dry build would delete the following files: {0}]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Um build não dry excluiria os seguintes arquivos: {0}]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -950,6 +956,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Add_braces_to_arrow_function_95059" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Add braces to arrow function]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Adicionar chaves para a função de seta]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Add_definite_assignment_assertion_to_property_0_95020" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Add definite assignment assertion to property '{0}']]></Val>
@@ -1022,6 +1037,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Add_or_remove_braces_in_an_arrow_function_95058" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Add or remove braces in an arrow function]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Adicionar ou remover chaves em uma função de seta]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Add_qualifier_to_all_unresolved_variables_matching_a_member_name_95037" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Add qualifier to all unresolved variables matching a member name]]></Val>
@@ -1766,18 +1790,27 @@
       <Item ItemId=";Build_all_projects_including_those_that_appear_to_be_up_to_date_6368" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Build all projects, including those that appear to be up to date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Compilar todos os projetos, incluindo aqueles que parecem estar atualizados]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Build_one_or_more_projects_and_their_dependencies_if_out_of_date_6364" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Build one or more projects and their dependencies, if out of date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Compilar um ou mais projetos e suas dependências, se estiverem desatualizados]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Building_project_0_6358" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Building project '{0}'...]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Compilando o projeto '{0}'...]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -2858,6 +2891,9 @@
       <Item ItemId=";Delete_the_outputs_of_all_projects_6365" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Delete the outputs of all projects]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Excluir as saídas de todos os projetos]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -3320,6 +3356,9 @@
       <Item ItemId=";Enable_verbose_logging_6366" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Enable verbose logging]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Habilitar registro em log detalhado]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -5753,6 +5792,9 @@
       <Item ItemId=";Option_build_must_be_the_first_command_line_argument_6369" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Option '--build' must be the first command line argument.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[A opção '--build' precisa ser o primeiro argumento da linha de comando.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -5795,6 +5837,9 @@
       <Item ItemId=";Options_0_and_1_cannot_be_combined_6370" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Options '{0}' and '{1}' cannot be combined.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[As opções '{0}' e '{1}' não podem ser combinadas.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6230,42 +6275,63 @@
       <Item ItemId=";Project_0_can_t_be_built_because_its_dependency_1_has_errors_6363" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' can't be built because its dependency '{1}' has errors]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[O projeto '{0}' não pode ser compilado porque sua dependência '{1}' tem erros]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_out_of_date_because_its_dependency_1_is_out_of_date_6353" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is out of date because its dependency '{1}' is out of date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[O projeto '{0}' está desatualizado porque sua dependência '{1}' está desatualizada]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_out_of_date_because_oldest_output_1_is_older_than_newest_input_2_6350" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is out of date because oldest output '{1}' is older than newest input '{2}']]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[O projeto '{0}' está desatualizado porque a saída mais antiga '{1}' é mais antiga que a entrada mais recente '{2}']]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_out_of_date_because_output_file_1_does_not_exist_6352" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is out of date because output file '{1}' does not exist]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[O projeto '{0}' está desatualizado porque o arquivo de saída '{1}' não existe]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_up_to_date_6361" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is up to date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[O projeto '{0}' está atualizado]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_up_to_date_because_newest_input_1_is_older_than_oldest_output_2_6351" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is up to date because newest input '{1}' is older than oldest output '{2}']]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[O projeto '{0}' está atualizado porque a entrada mais recente '{1}' é mais antiga que a saída mais antiga '{2}']]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_up_to_date_with_d_ts_files_from_its_dependencies_6354" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is up to date with .d.ts files from its dependencies]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[O projeto '{0}' está atualizado com os arquivos .d.ts de suas dependências]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6281,6 +6347,9 @@
       <Item ItemId=";Projects_in_this_build_Colon_0_6355" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Projects in this build: {0}]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Projetos neste build: {0}]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6746,6 +6815,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Remove_braces_from_arrow_function_95060" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Remove braces from arrow function]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Remover chaves da função de seta]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Remove_declaration_for_Colon_0_90004" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Remove declaration for: '{0}']]></Val>
@@ -7322,6 +7400,9 @@
       <Item ItemId=";Show_what_would_be_built_or_deleted_if_specified_with_clean_6367" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Show what would be built (or deleted, if specified with '--clean')]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Mostrar o que seria compilado (ou excluído, se especificado com '--clean')]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -7346,12 +7427,18 @@
       <Item ItemId=";Skipping_build_of_project_0_because_its_dependency_1_has_errors_6362" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Skipping build of project '{0}' because its dependency '{1}' has errors]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Ignorando build do projeto '{0}' porque sua dependência '{1}' tem erros]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Skipping_clean_because_not_all_projects_could_be_located_6371" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Skipping clean because not all projects could be located]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Ignorando a limpeza porque nem todos os projetos foram localizados]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -8966,6 +9053,9 @@
       <Item ItemId=";Updating_output_timestamps_of_project_0_6359" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Updating output timestamps of project '{0}'...]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Atualizando os carimbos de data/hora de saída do projeto '{0}'...]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -9521,6 +9611,9 @@
       <Item ItemId=";delete_this_Project_0_is_up_to_date_because_it_was_previously_built_6360" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[delete this - Project '{0}' is up to date because it was previously built]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[excluir isto – o Projeto '{0}' está atualizado porque ele já foi compilado]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
diff --git a/src/loc/lcl/rus/diagnosticMessages/diagnosticMessages.generated.json.lcl b/src/loc/lcl/rus/diagnosticMessages/diagnosticMessages.generated.json.lcl
index 282a359371168..f60ca0af9efab 100644
--- a/src/loc/lcl/rus/diagnosticMessages/diagnosticMessages.generated.json.lcl
+++ b/src/loc/lcl/rus/diagnosticMessages/diagnosticMessages.generated.json.lcl
@@ -482,6 +482,24 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";A_non_dry_build_would_build_project_0_6357" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[A non-dry build would build project '{0}']]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[При выполнении сборки в рабочем режиме будет собран проект "{0}"]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";A_non_dry_build_would_delete_the_following_files_Colon_0_6356" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[A non-dry build would delete the following files: {0}]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[При выполнении сборки в рабочем режиме будут удалены следующие файлы: {0}]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation_2371" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A parameter initializer is only allowed in a function or constructor implementation.]]></Val>
@@ -947,6 +965,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Add_braces_to_arrow_function_95059" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Add braces to arrow function]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Добавить скобки в стрелочную функцию]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Add_definite_assignment_assertion_to_property_0_95020" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Add definite assignment assertion to property '{0}']]></Val>
@@ -1016,6 +1043,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Add_or_remove_braces_in_an_arrow_function_95058" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Add or remove braces in an arrow function]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Добавить скобки в стрелочную функцию или удалить скобки из нее]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Add_qualifier_to_all_unresolved_variables_matching_a_member_name_95037" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Add qualifier to all unresolved variables matching a member name]]></Val>
@@ -1757,6 +1793,33 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Build_all_projects_including_those_that_appear_to_be_up_to_date_6368" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Build all projects, including those that appear to be up to date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Собрать все проекты, включая не требующие обновления]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Build_one_or_more_projects_and_their_dependencies_if_out_of_date_6364" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Build one or more projects and their dependencies, if out of date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Собрать один проект или несколько и их зависимости, если они не обновлены]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Building_project_0_6358" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Building project '{0}'...]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Сборка проекта "{0}"...]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Call_decorator_expression_90028" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Call decorator expression]]></Val>
@@ -1937,12 +2000,18 @@
       <Item ItemId=";Cannot_find_lib_definition_for_0_2726" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Cannot find lib definition for '{0}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Не удается найти определение lib для "{0}".]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Cannot_find_lib_definition_for_0_Did_you_mean_1_2727" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Cannot find lib definition for '{0}'. Did you mean '{1}'?]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Не удается найти определение lib для "{0}". Вы имели в виду "{1}"?]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -2825,6 +2894,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Delete_the_outputs_of_all_projects_6365" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Delete the outputs of all projects]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Удалить выходные данные всех проектов]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Deprecated_Use_jsxFactory_instead_Specify_the_object_invoked_for_createElement_when_targeting_react__6084" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[[Deprecated]5D; Use '--jsxFactory' instead. Specify the object invoked for createElement when targeting 'react' JSX emit]]></Val>
@@ -3281,6 +3359,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Enable_verbose_logging_6366" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Enable verbose logging]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Включить подробное ведение журнала]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Enables_emit_interoperability_between_CommonJS_and_ES_Modules_via_creation_of_namespace_objects_for__7037" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'.]]></Val>
@@ -5708,6 +5795,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Option_build_must_be_the_first_command_line_argument_6369" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Option '--build' must be the first command line argument.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Параметр "--build" должен быть первым аргументом командной строки.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES_5047" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Option 'isolatedModules' can only be used when either option '--module' is provided or option 'target' is 'ES2015' or higher.]]></Val>
@@ -5744,6 +5840,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Options_0_and_1_cannot_be_combined_6370" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Options '{0}' and '{1}' cannot be combined.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Параметры "{0}" и "{1}" не могут использоваться одновременно.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Options_Colon_6027" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Options:]]></Val>
@@ -6176,6 +6281,69 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Project_0_can_t_be_built_because_its_dependency_1_has_errors_6363" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Project '{0}' can't be built because its dependency '{1}' has errors]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Не удается собрать проект "{0}", так как его зависимость "{1}" содержит ошибки]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Project_0_is_out_of_date_because_its_dependency_1_is_out_of_date_6353" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Project '{0}' is out of date because its dependency '{1}' is out of date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Проект "{0}" требует обновления, так как не обновлена его зависимость "{1}"]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Project_0_is_out_of_date_because_oldest_output_1_is_older_than_newest_input_2_6350" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Project '{0}' is out of date because oldest output '{1}' is older than newest input '{2}']]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Проект "{0}" требует обновления, так как самые старые выходные данные "{1}" старше самых новых входных данных "{2}"]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Project_0_is_out_of_date_because_output_file_1_does_not_exist_6352" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Project '{0}' is out of date because output file '{1}' does not exist]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Проект "{0}" требует обновления, так как выходного файла "{1}" не существует]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Project_0_is_up_to_date_6361" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Project '{0}' is up to date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Проект "{0}" не требует обновления]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Project_0_is_up_to_date_because_newest_input_1_is_older_than_oldest_output_2_6351" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Project '{0}' is up to date because newest input '{1}' is older than oldest output '{2}']]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Проект "{0}" не требует обновления, так как самые новые входные данные "{1}" старее самых старых выходных данных "{2}"]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Project_0_is_up_to_date_with_d_ts_files_from_its_dependencies_6354" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Project '{0}' is up to date with .d.ts files from its dependencies]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Проект "{0}" не требует обновления с файлами .d.ts, взятыми из зависимостей проекта]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Project_references_may_not_form_a_circular_graph_Cycle_detected_Colon_0_6202" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project references may not form a circular graph. Cycle detected: {0}]]></Val>
@@ -6185,6 +6353,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Projects_in_this_build_Colon_0_6355" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Projects in this build: {0}]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Проекты в этой сборке: {0}]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Projects_to_reference_6300" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Projects to reference]]></Val>
@@ -6647,6 +6824,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Remove_braces_from_arrow_function_95060" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Remove braces from arrow function]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Удалить скобки из стрелочной функции]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Remove_declaration_for_Colon_0_90004" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Remove declaration for: '{0}']]></Val>
@@ -7220,6 +7406,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Show_what_would_be_built_or_deleted_if_specified_with_clean_6367" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Show what would be built (or deleted, if specified with '--clean')]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Показать компоненты, которые будут собраны (или удалены, если дополнительно указан параметр "--clean")]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Signature_0_must_be_a_type_predicate_1224" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Signature '{0}' must be a type predicate.]]></Val>
@@ -7238,6 +7433,24 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Skipping_build_of_project_0_because_its_dependency_1_has_errors_6362" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Skipping build of project '{0}' because its dependency '{1}' has errors]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Сборка проекта "{0}" будет пропущена, так как его зависимость "{1}" содержит ошибки]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Skipping_clean_because_not_all_projects_could_be_located_6371" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Skipping clean because not all projects could be located]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Очистка будет пропущена, так как не удалось найти некоторые проекты]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Source_Map_Options_6175" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Source Map Options]]></Val>
@@ -8846,6 +9059,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Updating_output_timestamps_of_project_0_6359" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Updating output timestamps of project '{0}'...]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Обновление меток времени в выходных данных проекта "{0}"...]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Use_synthetic_default_member_95016" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Use synthetic 'default' member.]]></Val>
@@ -9395,6 +9617,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";delete_this_Project_0_is_up_to_date_because_it_was_previously_built_6360" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[delete this - Project '{0}' is up to date because it was previously built]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[удалить это — проект "{0}" не требует обновления, так как был собран ранее]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";enum_declarations_can_only_be_used_in_a_ts_file_8015" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA['enum declarations' can only be used in a .ts file.]]></Val>
diff --git a/src/loc/lcl/trk/diagnosticMessages/diagnosticMessages.generated.json.lcl b/src/loc/lcl/trk/diagnosticMessages/diagnosticMessages.generated.json.lcl
index 04335da0e8390..a3e1086594a46 100644
--- a/src/loc/lcl/trk/diagnosticMessages/diagnosticMessages.generated.json.lcl
+++ b/src/loc/lcl/trk/diagnosticMessages/diagnosticMessages.generated.json.lcl
@@ -479,12 +479,18 @@
       <Item ItemId=";A_non_dry_build_would_build_project_0_6357" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A non-dry build would build project '{0}']]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[DRY dışı bir derleme '{0}' projesini derler]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_non_dry_build_would_delete_the_following_files_Colon_0_6356" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A non-dry build would delete the following files: {0}]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[DRY dışı bir derleme şu dosyaları siler: {0}]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -953,6 +959,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Add_braces_to_arrow_function_95059" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Add braces to arrow function]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Ok işlevine küme ayracı ekleyin]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Add_definite_assignment_assertion_to_property_0_95020" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Add definite assignment assertion to property '{0}']]></Val>
@@ -1022,6 +1037,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Add_or_remove_braces_in_an_arrow_function_95058" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Add or remove braces in an arrow function]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Ok işlevine küme ayracı ekleyin veya kaldırın]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Add_qualifier_to_all_unresolved_variables_matching_a_member_name_95037" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Add qualifier to all unresolved variables matching a member name]]></Val>
@@ -1766,18 +1790,27 @@
       <Item ItemId=";Build_all_projects_including_those_that_appear_to_be_up_to_date_6368" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Build all projects, including those that appear to be up to date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Güncel görünenler de dahil olmak üzere tüm projeleri derleyin]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Build_one_or_more_projects_and_their_dependencies_if_out_of_date_6364" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Build one or more projects and their dependencies, if out of date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Eskiyse, bir veya daha fazla projeyi ve bağımlılıklarını derleyin]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Building_project_0_6358" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Building project '{0}'...]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA['{0}' projesi derleniyor...]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -2858,6 +2891,9 @@
       <Item ItemId=";Delete_the_outputs_of_all_projects_6365" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Delete the outputs of all projects]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Tüm projelerin çıkışlarını silin]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -3320,6 +3356,9 @@
       <Item ItemId=";Enable_verbose_logging_6366" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Enable verbose logging]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Ayrıntılı günlüğe yazmayı etkinleştirin]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -5753,6 +5792,9 @@
       <Item ItemId=";Option_build_must_be_the_first_command_line_argument_6369" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Option '--build' must be the first command line argument.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA['--build' seçeneği ilk komut satırı bağımsız değişkeni olmalıdır.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -5795,6 +5837,9 @@
       <Item ItemId=";Options_0_and_1_cannot_be_combined_6370" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Options '{0}' and '{1}' cannot be combined.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA['{0}' ve '{1}' seçenekleri birleştirilemez.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6233,42 +6278,63 @@
       <Item ItemId=";Project_0_can_t_be_built_because_its_dependency_1_has_errors_6363" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' can't be built because its dependency '{1}' has errors]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA['{0}' projesinin '{1}' bağımlılığında hatalar olduğundan proje derlenemiyor]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_out_of_date_because_its_dependency_1_is_out_of_date_6353" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is out of date because its dependency '{1}' is out of date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA['{0}' projesinin '{1}' bağımlılığı güncel olmadığından proje güncel değil]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_out_of_date_because_oldest_output_1_is_older_than_newest_input_2_6350" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is out of date because oldest output '{1}' is older than newest input '{2}']]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[En eski '{1}' çıkışı en yeni '{2}' girişinden daha eski olduğundan '{0}' projesi güncel değil]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_out_of_date_because_output_file_1_does_not_exist_6352" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is out of date because output file '{1}' does not exist]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Çıkış dosyası '{1}' mevcut olmadığından '{0}' projesi güncel değil]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_up_to_date_6361" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is up to date]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA['{0}' projesi güncel]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_up_to_date_because_newest_input_1_is_older_than_oldest_output_2_6351" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is up to date because newest input '{1}' is older than oldest output '{2}']]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[En yeni '{1}' girişi en eski '{2}' çıkışından daha eski olduğundan '{0}' projesi güncel]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Project_0_is_up_to_date_with_d_ts_files_from_its_dependencies_6354" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Project '{0}' is up to date with .d.ts files from its dependencies]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA['{0}' projesi bağımlılıklarından d.ts dosyaları ile güncel]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6284,6 +6350,9 @@
       <Item ItemId=";Projects_in_this_build_Colon_0_6355" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Projects in this build: {0}]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Bu derlemedeki projeler: {0}]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6749,6 +6818,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Remove_braces_from_arrow_function_95060" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Remove braces from arrow function]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Ok işlevinden köşeli ayraçları kaldırın]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Remove_declaration_for_Colon_0_90004" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Remove declaration for: '{0}']]></Val>
@@ -7325,6 +7403,9 @@
       <Item ItemId=";Show_what_would_be_built_or_deleted_if_specified_with_clean_6367" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Show what would be built (or deleted, if specified with '--clean')]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Nelerin derleneceğini (veya '--clean' ile belirtilmişse silineceğini) göster]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -7349,12 +7430,18 @@
       <Item ItemId=";Skipping_build_of_project_0_because_its_dependency_1_has_errors_6362" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Skipping build of project '{0}' because its dependency '{1}' has errors]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA['{0}' projesinin '{1}' bağımlılığında hatalar olduğundan projenin derlenmesi atlanıyor]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Skipping_clean_because_not_all_projects_could_be_located_6371" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Skipping clean because not all projects could be located]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Tüm projeler bulunamadığından temizleme atlanıyor]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -8969,6 +9056,9 @@
       <Item ItemId=";Updating_output_timestamps_of_project_0_6359" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Updating output timestamps of project '{0}'...]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA['{0}' projesinin çıkış zaman damgaları güncelleştiriliyor...]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -9524,6 +9614,9 @@
       <Item ItemId=";delete_this_Project_0_is_up_to_date_because_it_was_previously_built_6360" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[delete this - Project '{0}' is up to date because it was previously built]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[bunu silin - '{0}' projesi önceden derlenmiş olduğundan güncel]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
diff --git a/src/parser/tsconfig.json b/src/parser/tsconfig.json
deleted file mode 100644
index 05c61d0240869..0000000000000
--- a/src/parser/tsconfig.json
+++ /dev/null
@@ -1,19 +0,0 @@
-{
-    "extends": "../tsconfig-base",
-    "compilerOptions": {
-        "outFile": "../../built/local/parser.js"
-    },
-    "files": [
-        "types.ts",
-        "sys.ts",
-        "diagnosticInformationMap.generated.ts",
-        "scanner.ts",
-        "utilities.ts",
-        "parser.ts",
-        "commandLineParser.ts",
-        "moduleNameResolver.ts"
-    ],
-    "references": [
-        { "path": "../core" }
-    ]
-}
diff --git a/src/server/protocol.ts b/src/server/protocol.ts
index 3082dbae6aa1e..4fed23363ebc9 100644
--- a/src/server/protocol.ts
+++ b/src/server/protocol.ts
@@ -466,6 +466,7 @@ namespace ts.server.protocol {
         code: number;
         /** May store more in future. For now, this will simply be `true` to indicate when a diagnostic is an unused-identifier diagnostic. */
         reportsUnnecessary?: {};
+        relatedInformation?: DiagnosticRelatedInformation[];
     }
 
     /**
@@ -2215,6 +2216,11 @@ namespace ts.server.protocol {
 
         reportsUnnecessary?: {};
 
+        /**
+         * Any related spans the diagnostic may have, such as other locations relevant to an error, such as declarartion sites
+         */
+        relatedInformation?: DiagnosticRelatedInformation[];
+
         /**
          * The error code of the diagnostic message.
          */
@@ -2233,6 +2239,23 @@ namespace ts.server.protocol {
         fileName: string;
     }
 
+    /**
+     * Represents additional spans returned with a diagnostic which are relevant to it
+     * Like DiagnosticWithLinePosition, this is provided in two forms:
+     *   - start and length of the span
+     *   - startLocation and endLocation a pair of Location objects storing the start/end line offset of the span
+     */
+    export interface DiagnosticRelatedInformation {
+        /**
+         * Text of related or additional information.
+         */
+        message: string;
+        /**
+         * Associated location
+         */
+        span?: FileSpan;
+    }
+
     export interface DiagnosticEventBody {
         /**
          * The file for which diagnostic information is reported.
diff --git a/src/server/session.ts b/src/server/session.ts
index 88980367e8424..74629d97e4877 100644
--- a/src/server/session.ts
+++ b/src/server/session.ts
@@ -76,7 +76,24 @@ namespace ts.server {
             code: diag.code,
             category: diagnosticCategoryName(diag),
             reportsUnnecessary: diag.reportsUnnecessary,
-            source: diag.source
+            source: diag.source,
+            relatedInformation: map(diag.relatedInformation, formatRelatedInformation),
+        };
+    }
+
+    function formatRelatedInformation(info: DiagnosticRelatedInformation): protocol.DiagnosticRelatedInformation {
+        if (!info.file) {
+            return {
+                message: flattenDiagnosticMessageText(info.messageText, "\n")
+            };
+        }
+        return {
+            span: {
+                start: convertToLocation(getLineAndCharacterOfPosition(info.file, info.start!)),
+                end: convertToLocation(getLineAndCharacterOfPosition(info.file, info.start! + info.length!)), // TODO: GH#18217
+                file: info.file.fileName
+            },
+            message: flattenDiagnosticMessageText(info.messageText, "\n")
         };
     }
 
@@ -92,8 +109,19 @@ namespace ts.server {
         const text = flattenDiagnosticMessageText(diag.messageText, "\n");
         const { code, source } = diag;
         const category = diagnosticCategoryName(diag);
-        return includeFileName ? { start, end, text, code, category, source, reportsUnnecessary: diag.reportsUnnecessary, fileName: diag.file && diag.file.fileName } :
-            { start, end, text, code, category, reportsUnnecessary: diag.reportsUnnecessary, source };
+        const common = {
+            start,
+            end,
+            text,
+            code,
+            category,
+            reportsUnnecessary: diag.reportsUnnecessary,
+            source,
+            relatedInformation: map(diag.relatedInformation, formatRelatedInformation),
+        };
+        return includeFileName
+            ? { ...common, fileName: diag.file && diag.file.fileName }
+            : common;
     }
 
     export interface PendingErrorCheck {
@@ -612,7 +640,8 @@ namespace ts.server {
                 category: diagnosticCategoryName(d),
                 code: d.code,
                 startLocation: (d.file && convertToLocation(getLineAndCharacterOfPosition(d.file, d.start!)))!, // TODO: GH#18217
-                endLocation: (d.file && convertToLocation(getLineAndCharacterOfPosition(d.file, d.start! + d.length!)))! // TODO: GH#18217
+                endLocation: (d.file && convertToLocation(getLineAndCharacterOfPosition(d.file, d.start! + d.length!)))!, // TODO: GH#18217
+                relatedInformation: map(d.relatedInformation, formatRelatedInformation)
             }));
         }
 
@@ -640,7 +669,8 @@ namespace ts.server {
                 source: d.source,
                 startLocation: scriptInfo && scriptInfo.positionToLineOffset(d.start!), // TODO: GH#18217
                 endLocation: scriptInfo && scriptInfo.positionToLineOffset(d.start! + d.length!),
-                reportsUnnecessary: d.reportsUnnecessary
+                reportsUnnecessary: d.reportsUnnecessary,
+                relatedInformation: map(d.relatedInformation, formatRelatedInformation),
             });
         }
 
diff --git a/src/server/tsconfig.json b/src/server/tsconfig.json
index ba301c2834178..86d205d3bb141 100644
--- a/src/server/tsconfig.json
+++ b/src/server/tsconfig.json
@@ -9,8 +9,6 @@
         ]
     },
     "references": [
-        { "path": "../core" },
-        { "path": "../parser" },
         { "path": "../compiler" },
         { "path": "../jsTyping" },
         { "path": "../services" }
diff --git a/src/services/codefixes/fixInvalidImportSyntax.ts b/src/services/codefixes/fixInvalidImportSyntax.ts
index cfdc19e257d30..906c6f13cd1e0 100644
--- a/src/services/codefixes/fixInvalidImportSyntax.ts
+++ b/src/services/codefixes/fixInvalidImportSyntax.ts
@@ -2,25 +2,6 @@
 namespace ts.codefix {
     const fixName = "invalidImportSyntax";
 
-    registerCodeFix({
-        errorCodes: [Diagnostics.A_namespace_style_import_cannot_be_called_or_constructed_and_will_cause_a_failure_at_runtime.code],
-        getCodeActions: getActionsForInvalidImport
-    });
-
-    function getActionsForInvalidImport(context: CodeFixContext): CodeFixAction[] | undefined {
-        const sourceFile = context.sourceFile;
-
-        // This is the whole import statement, eg:
-        // import * as Bluebird from 'bluebird';
-        // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-        const node = getTokenAtPosition(sourceFile, context.span.start, /*includeJsDocComment*/ false).parent as ImportDeclaration;
-        if (!isImportDeclaration(node)) {
-            // No import quick fix for import calls
-            return [];
-        }
-        return getCodeFixesForImportDeclaration(context, node);
-    }
-
     function getCodeFixesForImportDeclaration(context: CodeFixContext, node: ImportDeclaration): CodeFixAction[] {
         const sourceFile = getSourceFileOfNode(node);
         const namespace = getNamespaceDeclarationNode(node) as NamespaceImport;
@@ -45,7 +26,7 @@ namespace ts.codefix {
 
     function createAction(context: CodeFixContext, sourceFile: SourceFile, node: Node, replacement: Node): CodeFixAction {
         const changes = textChanges.ChangeTracker.with(context, t => t.replaceNode(sourceFile, node, replacement));
-        return createCodeFixActionNoFixId("invalidImportSyntax", changes, [Diagnostics.Replace_import_with_0, changes[0].textChanges[0].newText]);
+        return createCodeFixActionNoFixId(fixName, changes, [Diagnostics.Replace_import_with_0, changes[0].textChanges[0].newText]);
     }
 
     registerCodeFix({
@@ -64,6 +45,38 @@ namespace ts.codefix {
             return [];
         }
         const expr = node.expression;
+        return getImportCodeFixesForExpression(context, expr);
+    }
+
+    registerCodeFix({
+        errorCodes: [
+            // The following error codes cover pretty much all assignability errors that could involve an expression
+            Diagnostics.Argument_of_type_0_is_not_assignable_to_parameter_of_type_1.code,
+            Diagnostics.Type_0_does_not_satisfy_the_constraint_1.code,
+            Diagnostics.Type_0_is_not_assignable_to_type_1.code,
+            Diagnostics.Type_0_is_not_assignable_to_type_1_Two_different_types_with_this_name_exist_but_they_are_unrelated.code,
+            Diagnostics.Type_predicate_0_is_not_assignable_to_1.code,
+            Diagnostics.Property_0_of_type_1_is_not_assignable_to_string_index_type_2.code,
+            Diagnostics.Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2.code,
+            Diagnostics.Numeric_index_type_0_is_not_assignable_to_string_index_type_1.code,
+            Diagnostics.Property_0_in_type_1_is_not_assignable_to_the_same_property_in_base_type_2.code,
+            Diagnostics.Property_0_in_type_1_is_not_assignable_to_type_2.code,
+            Diagnostics.Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property.code,
+            Diagnostics.The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1.code,
+        ],
+        getCodeActions: getActionsForInvalidImportLocation
+    });
+
+    function getActionsForInvalidImportLocation(context: CodeFixContext): CodeFixAction[] | undefined {
+        const sourceFile = context.sourceFile;
+        const node = findAncestor(getTokenAtPosition(sourceFile, context.span.start, /*includeJsDocComment*/ false), a => a.getStart() === context.span.start && a.getEnd() === (context.span.start + context.span.length));
+        if (!node) {
+            return [];
+        }
+        return getImportCodeFixesForExpression(context, node);
+    }
+
+    function getImportCodeFixesForExpression(context: CodeFixContext, expr: Node): CodeFixAction[] | undefined {
         const type = context.program.getTypeChecker().getTypeAtLocation(expr)!; // TODO: GH#18217
         if (!(type.symbol && (type.symbol as TransientSymbol).originatingImport)) {
             return [];
@@ -73,8 +86,11 @@ namespace ts.codefix {
         if (!isImportCall(relatedImport)) {
             addRange(fixes, getCodeFixesForImportDeclaration(context, relatedImport));
         }
-        const changes = textChanges.ChangeTracker.with(context, t => t.replaceNode(sourceFile, expr, createPropertyAccess(expr, "default"), {}));
-        fixes.push(createCodeFixActionNoFixId(fixName, changes, Diagnostics.Use_synthetic_default_member));
+        if (isExpression(expr) && !(isNamedDeclaration(expr.parent) && expr.parent.name === expr)) {
+            const sourceFile = context.sourceFile;
+            const changes = textChanges.ChangeTracker.with(context, t => t.replaceNode(sourceFile, expr, createPropertyAccess(expr, "default"), {}));
+            fixes.push(createCodeFixActionNoFixId(fixName, changes, Diagnostics.Use_synthetic_default_member));
+        }
         return fixes;
     }
 }
diff --git a/src/services/codefixes/importFixes.ts b/src/services/codefixes/importFixes.ts
index 66402068fa407..86f64a79cf2b5 100644
--- a/src/services/codefixes/importFixes.ts
+++ b/src/services/codefixes/importFixes.ts
@@ -194,7 +194,6 @@ namespace ts.codefix {
 
     function getCodeActionForNewImport(context: SymbolContext & { preferences: UserPreferences }, { moduleSpecifier, importKind }: NewImportInfo): CodeFixAction {
         const { sourceFile, symbolName, preferences } = context;
-        const lastImportDeclaration = findLast(sourceFile.statements, isAnyImportSyntax);
 
         const moduleSpecifierWithoutQuotes = stripQuotes(moduleSpecifier);
         const quotedModuleSpecifier = makeStringLiteral(moduleSpecifierWithoutQuotes, getQuotePreference(sourceFile, preferences));
@@ -210,14 +209,7 @@ namespace ts.codefix {
                 createIdentifier(symbolName),
                 createExternalModuleReference(quotedModuleSpecifier));
 
-        const changes = ChangeTracker.with(context, changeTracker => {
-            if (lastImportDeclaration) {
-                changeTracker.insertNodeAfter(sourceFile, lastImportDeclaration, importDecl);
-            }
-            else {
-                changeTracker.insertNodeAtTopOfFile(sourceFile, importDecl, /*blankLineBetween*/ true);
-            }
-        });
+        const changes = ChangeTracker.with(context, t => insertImport(t, sourceFile, importDecl));
 
         // if this file doesn't have any import statements, insert an import statement and then insert a new line
         // between the only import statement and user code. Otherwise just insert the statement because chances
@@ -247,7 +239,7 @@ namespace ts.codefix {
         preferences: UserPreferences,
     ): ReadonlyArray<NewImportInfo> {
         const choicesForEachExportingModule = flatMap<SymbolExportInfo, NewImportInfo[]>(moduleSymbols, ({ moduleSymbol, importKind }) => {
-            const modulePathsGroups = moduleSpecifiers.getModuleSpecifiers(moduleSymbol, program, sourceFile, host, preferences);
+            const modulePathsGroups = moduleSpecifiers.getModuleSpecifiers(moduleSymbol, program.getCompilerOptions(), sourceFile, host, program.getSourceFiles(), preferences);
             return modulePathsGroups.map(group => group.map(moduleSpecifier => ({ moduleSpecifier, importKind })));
         });
         // Sort to keep the shortest paths first, but keep [relativePath, importRelativeToBaseUrl] groups together
diff --git a/src/services/getEditsForFileRename.ts b/src/services/getEditsForFileRename.ts
index a7e41d2014f31..8960950bf38cd 100644
--- a/src/services/getEditsForFileRename.ts
+++ b/src/services/getEditsForFileRename.ts
@@ -103,13 +103,16 @@ namespace ts {
         preferences: UserPreferences,
     ): void {
         for (const sourceFile of program.getSourceFiles()) {
-            const newImportFromPath = oldToNew(sourceFile.fileName) || sourceFile.fileName;
+            const newFromOld = oldToNew(sourceFile.fileName);
+            const newImportFromPath = newFromOld !== undefined ? newFromOld : sourceFile.fileName;
             const newImportFromDirectory = getDirectoryPath(newImportFromPath);
 
             const oldFromNew: string | undefined = newToOld(sourceFile.fileName);
             const oldImportFromPath: string = oldFromNew || sourceFile.fileName;
             const oldImportFromDirectory = getDirectoryPath(oldImportFromPath);
 
+            const importingSourceFileMoved = newFromOld !== undefined || oldFromNew !== undefined;
+
             updateImportsWorker(sourceFile, changeTracker,
                 referenceText => {
                     if (!pathIsRelative(referenceText)) return undefined;
@@ -123,7 +126,10 @@ namespace ts {
                         // TODO:GH#18217
                         ? getSourceFileToImportFromResolved(resolveModuleName(importLiteral.text, oldImportFromPath, program.getCompilerOptions(), host as ModuleResolutionHost), oldToNew, program)
                         : getSourceFileToImport(importLiteral, sourceFile, program, host, oldToNew);
-                    return toImport === undefined ? undefined : moduleSpecifiers.getModuleSpecifier(program.getCompilerOptions(), sourceFile, newImportFromPath, toImport, host, preferences);
+                    // If neither the importing source file nor the imported file moved, do nothing.
+                    return toImport === undefined || !toImport.updated && !importingSourceFileMoved
+                        ? undefined
+                        : moduleSpecifiers.getModuleSpecifier(program.getCompilerOptions(), sourceFile, newImportFromPath, toImport.newFileName, host, preferences);
                 });
         }
     }
@@ -135,12 +141,18 @@ namespace ts {
         return ensurePathIsNonModuleName(combineNormal(pathA, pathB));
     }
 
-    function getSourceFileToImport(importLiteral: StringLiteralLike, importingSourceFile: SourceFile, program: Program, host: LanguageServiceHost, oldToNew: PathUpdater): string | undefined {
+    interface ToImport {
+        readonly newFileName: string;
+        /** True if the imported file was renamed. */
+        readonly updated: boolean;
+    }
+    function getSourceFileToImport(importLiteral: StringLiteralLike, importingSourceFile: SourceFile, program: Program, host: LanguageServiceHost, oldToNew: PathUpdater): ToImport | undefined {
         const symbol = program.getTypeChecker().getSymbolAtLocation(importLiteral);
         if (symbol) {
             if (symbol.declarations.some(d => isAmbientModule(d))) return undefined; // No need to update if it's an ambient module
             const oldFileName = find(symbol.declarations, isSourceFile)!.fileName;
-            return oldToNew(oldFileName) || oldFileName;
+            const newFileName = oldToNew(oldFileName);
+            return newFileName === undefined ? { newFileName: oldFileName, updated: false } : { newFileName, updated: true };
         }
         else {
             const resolved = host.resolveModuleNames
@@ -150,14 +162,15 @@ namespace ts {
         }
     }
 
-    function getSourceFileToImportFromResolved(resolved: ResolvedModuleWithFailedLookupLocations | undefined, oldToNew: PathUpdater, program: Program): string | undefined {
+    function getSourceFileToImportFromResolved(resolved: ResolvedModuleWithFailedLookupLocations | undefined, oldToNew: PathUpdater, program: Program): ToImport | undefined {
         return resolved && (
             (resolved.resolvedModule && getIfInProgram(resolved.resolvedModule.resolvedFileName)) || firstDefined(resolved.failedLookupLocations, getIfInProgram));
 
-        function getIfInProgram(oldLocation: string): string | undefined {
+        function getIfInProgram(oldLocation: string): ToImport | undefined {
             const newLocation = oldToNew(oldLocation);
+
             return program.getSourceFile(oldLocation) || newLocation !== undefined && program.getSourceFile(newLocation)
-                ? newLocation || oldLocation
+                ? newLocation !== undefined ? { newFileName: newLocation, updated: true } : { newFileName: oldLocation, updated: false }
                 : undefined;
         }
     }
diff --git a/src/services/refactors/moveToNewFile.ts b/src/services/refactors/moveToNewFile.ts
index 0c6aaa61b6546..f050e8fb174f7 100644
--- a/src/services/refactors/moveToNewFile.ts
+++ b/src/services/refactors/moveToNewFile.ts
@@ -121,7 +121,7 @@ namespace ts.refactor {
         const quotePreference = getQuotePreference(oldFile, preferences);
         const importsFromNewFile = createOldFileImportsFromNewFile(usage.oldFileImportsFromNewFile, newModuleName, useEs6ModuleSyntax, quotePreference);
         if (importsFromNewFile) {
-            changes.insertNodeBefore(oldFile, oldFile.statements[0], importsFromNewFile, /*blankLineBetween*/ true);
+            insertImport(changes, oldFile, importsFromNewFile);
         }
 
         deleteUnusedOldImports(oldFile, toMove.all, changes, usage.unusedImportsFromOldFile, checker);
diff --git a/src/services/services.ts b/src/services/services.ts
index db0213ed88ac5..24feaac17c629 100644
--- a/src/services/services.ts
+++ b/src/services/services.ts
@@ -1111,35 +1111,6 @@ namespace ts {
         }
     }
 
-    /* @internal */
-    export interface SourceFileLikeCache {
-        get(path: Path): SourceFileLike | undefined;
-    }
-
-    /* @internal */
-    export function createSourceFileLikeCache(host: { readFile?: (path: string) => string | undefined, fileExists?: (path: string) => boolean }): SourceFileLikeCache {
-        const cached = createMap<SourceFileLike>();
-        return {
-            get(path: Path) {
-                if (cached.has(path)) {
-                    return cached.get(path);
-                }
-                if (!host.fileExists || !host.readFile || !host.fileExists(path)) return;
-                // And failing that, check the disk
-                const text = host.readFile(path)!; // TODO: GH#18217
-                const file: SourceFileLike = {
-                    text,
-                    lineMap: undefined,
-                    getLineAndCharacterOfPosition(pos) {
-                        return computeLineAndCharacterOfPosition(getLineStarts(this), pos);
-                    }
-                };
-                cached.set(path, file);
-                return file;
-            }
-        };
-    }
-
     export function createLanguageService(
         host: LanguageServiceHost,
         documentRegistry: DocumentRegistry = createDocumentRegistry(host.useCaseSensitiveFileNames && host.useCaseSensitiveFileNames(), host.getCurrentDirectory()),
diff --git a/src/services/tsconfig.json b/src/services/tsconfig.json
index 90b77e537dafe..9318bbe4469d7 100644
--- a/src/services/tsconfig.json
+++ b/src/services/tsconfig.json
@@ -4,10 +4,8 @@
         "outFile": "../../built/local/services.js"
     },
     "references": [
-        { "path": "../core" },
-        { "path": "../parser" },
         { "path": "../compiler" },
-        { "path": "../jsTyping" },
+        { "path": "../jsTyping" }
     ],
     "files": [
         "types.ts",
@@ -78,7 +76,6 @@
         "refactors/generateGetAccessorAndSetAccessor.ts",
         "refactors/moveToNewFile.ts",
         "refactors/addOrRemoveBracesToArrowFunction.ts",
-        "sourcemaps.ts",
         "services.ts",
         "breakpoints.ts",
         "transform.ts",
diff --git a/src/services/utilities.ts b/src/services/utilities.ts
index 95c677ce2877e..9715d124d7eee 100644
--- a/src/services/utilities.ts
+++ b/src/services/utilities.ts
@@ -1379,6 +1379,17 @@ namespace ts {
         return textSpanContainsPosition(span, node.getStart(file)) &&
             node.getEnd() <= textSpanEnd(span);
     }
+
+    /* @internal */
+    export function insertImport(changes: textChanges.ChangeTracker, sourceFile: SourceFile, importDecl: Statement): void {
+        const lastImportDeclaration = findLast(sourceFile.statements, isAnyImportSyntax);
+        if (lastImportDeclaration) {
+            changes.insertNodeAfter(sourceFile, lastImportDeclaration, importDecl);
+        }
+        else {
+            changes.insertNodeAtTopOfFile(sourceFile, importDecl, /*blankLineBetween*/ true);
+        }
+    }
 }
 
 // Display-part writer helpers
diff --git a/src/testRunner/compilerRunner.ts b/src/testRunner/compilerRunner.ts
index fc295c80f2e86..69bd80bdf11b2 100644
--- a/src/testRunner/compilerRunner.ts
+++ b/src/testRunner/compilerRunner.ts
@@ -179,7 +179,9 @@ class CompilerTest {
             this.otherFiles,
             this.harnessSettings,
             /*options*/ tsConfigOptions,
-            /*currentDirectory*/ this.harnessSettings.currentDirectory);
+            /*currentDirectory*/ this.harnessSettings.currentDirectory,
+            testCaseContent.symlinks
+        );
 
         this.options = this.result.options;
     }
diff --git a/src/testRunner/tsconfig.json b/src/testRunner/tsconfig.json
index fd5c98561f0ab..3943d4f4f85ca 100644
--- a/src/testRunner/tsconfig.json
+++ b/src/testRunner/tsconfig.json
@@ -14,8 +14,6 @@
         ]
     },
     "references": [
-        { "path": "../core", "prepend": true },
-        { "path": "../parser", "prepend": true },
         { "path": "../compiler", "prepend": true },
         { "path": "../services", "prepend": true },
         { "path": "../jsTyping", "prepend": true },
diff --git a/src/testRunner/unittests/publicApi.ts b/src/testRunner/unittests/publicApi.ts
index a752ba754f93a..da2723fa58e86 100644
--- a/src/testRunner/unittests/publicApi.ts
+++ b/src/testRunner/unittests/publicApi.ts
@@ -5,6 +5,7 @@ describe("Public APIs", () => {
         let fileContent: string;
         before(() => {
             fileContent = Harness.IO.readFile(builtFile)!;
+            if (!fileContent) throw new Error(`File ${fileName} was not present in built/local`);
             fileContent = fileContent.replace(/\r\n/g, "\n");
         });
 
diff --git a/src/testRunner/unittests/tsbuild.ts b/src/testRunner/unittests/tsbuild.ts
index 9d093f61e096f..2ae034ff6738a 100644
--- a/src/testRunner/unittests/tsbuild.ts
+++ b/src/testRunner/unittests/tsbuild.ts
@@ -12,7 +12,7 @@ namespace ts {
 
     export namespace Sample1 {
         tick();
-        const projFs = loadProjectFromDisk("../../tests/projects/sample1");
+        const projFs = loadProjectFromDisk("tests/projects/sample1");
 
         const allExpectedOutputs = ["/src/tests/index.js",
             "/src/core/index.js", "/src/core/index.d.ts",
@@ -236,40 +236,33 @@ namespace ts {
     }
 
     export namespace OutFile {
-        const outFileFs = loadProjectFromDisk("../../tests/projects/outfile-concat");
+        const outFileFs = loadProjectFromDisk("tests/projects/outfile-concat");
 
         describe("tsbuild - baseline sectioned sourcemaps", () => {
-            const fs = outFileFs.shadow();
-            const host = new fakes.CompilerHost(fs);
-            const builder = createSolutionBuilder(host, buildHost, ["/src/third"], { dry: false, force: false, verbose: false });
-            clearDiagnostics();
-            builder.buildAllProjects();
-            assertDiagnosticMessages(/*none*/);
-
-            const files = [
-                "/src/third/thirdjs/output/third-output.js",
-                "/src/third/thirdjs/output/third-output.js.map"
-            ];
-
-            for (const file of files) {
-                it(`Generates files matching the baseline - ${file}`, () => {
-                    Harness.Baseline.runBaseline(getBaseFileName(file), () => {
-                        return fs.readFileSync(file, "utf-8");
-                    });
-                });
-            }
-
-            it(`Generates files matching the baseline - file listing for outFile-concat`, () => {
-                Harness.Baseline.runBaseline("outfile-concat-fileListing.txt", () => {
-                    return fs.getFileListing();
+            let fs: vfs.FileSystem | undefined;
+            before(() => {
+                fs = outFileFs.shadow();
+                const host = new fakes.CompilerHost(fs);
+                const builder = createSolutionBuilder(host, buildHost, ["/src/third"], { dry: false, force: false, verbose: false });
+                clearDiagnostics();
+                builder.buildAllProjects();
+                assertDiagnosticMessages(/*none*/);
+            });
+            after(() => {
+                fs = undefined;
+            });
+            it(`Generates files matching the baseline`, () => {
+                Harness.Baseline.runBaseline("outfile-concat.js", () => {
+                    const patch = fs!.diff();
+                    // tslint:disable-next-line:no-null-keyword
+                    return patch ? vfs.formatPatch(patch) : null;
                 });
             });
         });
     }
 
     describe("tsbuild - graph-ordering", () => {
-        const fs = new vfs.FileSystem(false);
-        const host = new fakes.CompilerHost(fs);
+        let host: fakes.CompilerHost | undefined;
         const deps: [string, string][] = [
             ["A", "B"],
             ["B", "C"],
@@ -280,7 +273,15 @@ namespace ts {
             ["F", "E"]
         ];
 
-        writeProjects(fs, ["A", "B", "C", "D", "E", "F", "G"], deps);
+        before(() => {
+            const fs = new vfs.FileSystem(false);
+            host = new fakes.CompilerHost(fs);
+            writeProjects(fs, ["A", "B", "C", "D", "E", "F", "G"], deps);
+        });
+
+        after(() => {
+            host = undefined;
+        });
 
         it("orders the graph correctly - specify two roots", () => {
             checkGraphOrdering(["A", "G"], ["A", "B", "C", "D", "E", "G"]);
@@ -299,7 +300,7 @@ namespace ts {
         });
 
         function checkGraphOrdering(rootNames: string[], expectedBuildSet: string[]) {
-            const builder = createSolutionBuilder(host, buildHost, rootNames, { dry: true, force: false, verbose: false });
+            const builder = createSolutionBuilder(host!, buildHost, rootNames, { dry: true, force: false, verbose: false });
 
             const projFileNames = rootNames.map(getProjectFileName);
             const graph = builder.getBuildGraph(projFileNames);
@@ -394,32 +395,17 @@ namespace ts {
     }
 
     function loadProjectFromDisk(root: string): vfs.FileSystem {
-        const fs = new vfs.FileSystem(/*ignoreCase*/ false, { time });
-        const rootPath = resolvePath(__dirname, root);
-        loadFsMirror(fs, rootPath, "/src");
-        fs.mkdirpSync("/lib");
-        const libs = ["es5", "dom", "webworker.importscripts", "scripthost"];
-        for (const lib of libs) {
-            const content = Harness.IO.readFile(combinePaths(Harness.libFolder, `lib.${lib}.d.ts`));
-            if (content === undefined) {
-                throw new Error(`Failed to read lib ${lib}`);
-            }
-            fs.writeFileSync(`/lib/lib.${lib}.d.ts`, content);
-        }
-        fs.writeFileSync("/lib/lib.d.ts", Harness.IO.readFile(combinePaths(Harness.libFolder, "lib.d.ts"))!);
-        fs.meta.set("defaultLibLocation", "/lib");
+        const resolver = vfs.createResolver(Harness.IO);
+        const fs = new vfs.FileSystem(/*ignoreCase*/ true, {
+            files: {
+                ["/lib"]: new vfs.Mount(vpath.resolve(Harness.IO.getWorkspaceRoot(), "built/local"), resolver),
+                ["/src"]: new vfs.Mount(vpath.resolve(Harness.IO.getWorkspaceRoot(), root), resolver)
+            },
+            cwd: "/",
+            meta: { defaultLibLocation: "/lib" },
+            time
+        });
         fs.makeReadonly();
         return fs;
     }
-
-    function loadFsMirror(vfs: vfs.FileSystem, localRoot: string, virtualRoot: string) {
-        vfs.mkdirpSync(virtualRoot);
-        for (const path of Harness.IO.readDirectory(localRoot)) {
-            const file = getBaseFileName(path);
-            vfs.writeFileSync(virtualRoot + "/" + file, Harness.IO.readFile(localRoot + "/" + file)!);
-        }
-        for (const dir of Harness.IO.getDirectories(localRoot)) {
-            loadFsMirror(vfs, localRoot + "/" + dir, virtualRoot + "/" + dir);
-        }
-    }
 }
\ No newline at end of file
diff --git a/src/testRunner/unittests/tscWatchMode.ts b/src/testRunner/unittests/tscWatchMode.ts
index 4d6797f08daef..2aaef43f2d962 100644
--- a/src/testRunner/unittests/tscWatchMode.ts
+++ b/src/testRunner/unittests/tscWatchMode.ts
@@ -2532,4 +2532,43 @@ declare module "fs" {
             checkWatchedDirectoriesDetailed(host, [mainPackageRoot, linkedPackageRoot, `${mainPackageRoot}/node_modules/@types`, `${projectRoot}/node_modules/@types`], 1, /*recursive*/ true);
         });
     });
+
+    describe("tsc-watch with custom module resolution", () => {
+        const projectRoot = "/user/username/projects/project";
+        const configFileJson: any = {
+            compilerOptions: { module: "commonjs", resolveJsonModule: true },
+            files: ["index.ts"]
+        };
+        const mainFile: File = {
+            path: `${projectRoot}/index.ts`,
+            content: "import settings from './settings.json';"
+        };
+        const config: File = {
+            path: `${projectRoot}/tsconfig.json`,
+            content: JSON.stringify(configFileJson)
+        };
+        const settingsJson: File = {
+            path: `${projectRoot}/settings.json`,
+            content: JSON.stringify({ content: "Print this" })
+        };
+
+        it("verify that module resolution with json extension works when returned without extension", () => {
+            const files = [libFile, mainFile, config, settingsJson];
+            const host = createWatchedSystem(files, { currentDirectory: projectRoot });
+            const compilerHost = createWatchCompilerHostOfConfigFile(config.path, {}, host);
+            const parsedCommandResult = parseJsonConfigFileContent(configFileJson, host, config.path);
+            compilerHost.resolveModuleNames = (moduleNames, containingFile) => moduleNames.map(m => {
+                const result = resolveModuleName(m, containingFile, parsedCommandResult.options, compilerHost);
+                const resolvedModule = result.resolvedModule!;
+                return {
+                    resolvedFileName: resolvedModule.resolvedFileName,
+                    isExternalLibraryImport: resolvedModule.isExternalLibraryImport,
+                    originalFileName: resolvedModule.originalPath,
+                };
+            });
+            const watch = createWatchProgram(compilerHost);
+            const program = watch.getCurrentProgram().getProgram();
+            checkProgramActualFiles(program, [mainFile.path, libFile.path, settingsJson.path]);
+        });
+    });
 }
diff --git a/src/testRunner/unittests/tsserverProjectSystem.ts b/src/testRunner/unittests/tsserverProjectSystem.ts
index 04720fe42aff7..feb7377a86852 100644
--- a/src/testRunner/unittests/tsserverProjectSystem.ts
+++ b/src/testRunner/unittests/tsserverProjectSystem.ts
@@ -503,8 +503,8 @@ namespace ts.projectSystem {
         checkNthEvent(session, server.toEvent(eventName, diagnostics), 0, isMostRecent);
     }
 
-    function createDiagnostic(start: protocol.Location, end: protocol.Location, message: DiagnosticMessage, args: ReadonlyArray<string> = [], category = diagnosticCategoryName(message), reportsUnnecessary?: {}): protocol.Diagnostic {
-        return { start, end, text: formatStringFromArgs(message.message, args), code: message.code, category, reportsUnnecessary, source: undefined };
+    function createDiagnostic(start: protocol.Location, end: protocol.Location, message: DiagnosticMessage, args: ReadonlyArray<string> = [], category = diagnosticCategoryName(message), reportsUnnecessary?: {}, relatedInformation?: protocol.DiagnosticRelatedInformation[]): protocol.Diagnostic {
+        return { start, end, text: formatStringFromArgs(message.message, args), code: message.code, category, reportsUnnecessary, relatedInformation, source: undefined };
     }
 
     function checkCompleteEvent(session: TestSession, numberOfCurrentEvents: number, expectedSequenceId: number, isMostRecent = true): void {
@@ -8011,10 +8011,10 @@ new C();`
                 checkCompleteEvent(session, 2, expectedSequenceId);
             }
 
-            function verifyWatchedFilesAndDirectories(host: TestServerHost, files: string[], directories: string[]) {
+            function verifyWatchedFilesAndDirectories(host: TestServerHost, files: string[], recursiveDirectories: string[], nonRecursiveDirectories: string[]) {
                 checkWatchedFilesDetailed(host, files.filter(f => f !== recognizersDateTimeSrcFile.path), 1);
-                checkWatchedDirectories(host, emptyArray, /*recursive*/ false);
-                checkWatchedDirectoriesDetailed(host, directories, 1, /*recursive*/ true);
+                checkWatchedDirectoriesDetailed(host, nonRecursiveDirectories, 1,  /*recursive*/ false);
+                checkWatchedDirectoriesDetailed(host, recursiveDirectories, 1, /*recursive*/ true);
             }
 
             function createSessionAndOpenFile(host: TestServerHost) {
@@ -8035,14 +8035,15 @@ new C();`
                     const filesWithNodeModulesSetup = [...filesWithSources, nodeModulesRecorgnizersText];
                     const filesAfterCompilation = [...filesWithNodeModulesSetup, recongnizerTextDistTypingFile];
 
-                    const watchedDirectoriesWithResolvedModule = [`${recognizersDateTime}/src`, withPathMapping ? packages : recognizersDateTime, ...getTypeRootsFromLocation(recognizersDateTime)];
+                    const watchedDirectoriesWithResolvedModule = [`${recognizersDateTime}/src`, ...(withPathMapping ? emptyArray : [recognizersDateTime]), ...getTypeRootsFromLocation(recognizersDateTime)];
                     const watchedDirectoriesWithUnresolvedModule = [recognizersDateTime, ...(withPathMapping ? [recognizersText] : emptyArray), ...watchedDirectoriesWithResolvedModule, ...getNodeModuleDirectories(packages)];
+                    const nonRecursiveWatchedDirectories = withPathMapping ? [packages] : emptyArray;
 
                     function verifyProjectWithResolvedModule(session: TestSession) {
                         const projectService = session.getProjectService();
                         const project = projectService.configuredProjects.get(recognizerDateTimeTsconfigPath)!;
                         checkProjectActualFiles(project, filesInProjectWithResolvedModule);
-                        verifyWatchedFilesAndDirectories(session.host, filesInProjectWithResolvedModule, watchedDirectoriesWithResolvedModule);
+                        verifyWatchedFilesAndDirectories(session.host, filesInProjectWithResolvedModule, watchedDirectoriesWithResolvedModule, nonRecursiveWatchedDirectories);
                         verifyErrors(session, []);
                     }
 
@@ -8050,7 +8051,7 @@ new C();`
                         const projectService = session.getProjectService();
                         const project = projectService.configuredProjects.get(recognizerDateTimeTsconfigPath)!;
                         checkProjectActualFiles(project, filesInProjectWithUnresolvedModule);
-                        verifyWatchedFilesAndDirectories(session.host, filesInProjectWithUnresolvedModule, watchedDirectoriesWithUnresolvedModule);
+                        verifyWatchedFilesAndDirectories(session.host, filesInProjectWithUnresolvedModule, watchedDirectoriesWithUnresolvedModule, nonRecursiveWatchedDirectories);
                         const startOffset = recognizersDateTimeSrcFile.content.indexOf('"') + 1;
                         verifyErrors(session, [
                             createDiagnostic({ line: 1, offset: startOffset }, { line: 1, offset: startOffset + moduleNameInFile.length }, Diagnostics.Cannot_find_module_0, [moduleName])
@@ -8506,6 +8507,65 @@ new C();`
                 }
             });
         });
+
+        it("when watching directories for failed lookup locations in amd resolution", () => {
+            const projectRoot = "/user/username/projects/project";
+            const nodeFile: File = {
+                path: `${projectRoot}/src/typings/node.d.ts`,
+                content: `
+declare module "fs" {
+    export interface something {
+    }
+}`
+            };
+            const electronFile: File = {
+                path: `${projectRoot}/src/typings/electron.d.ts`,
+                content: `
+declare module 'original-fs' {
+    import * as fs from 'fs';
+    export = fs;
+}`
+            };
+            const srcFile: File = {
+                path: `${projectRoot}/src/somefolder/srcfile.ts`,
+                content: `
+import { x } from "somefolder/module1";
+import { x } from "somefolder/module2";
+const y = x;`
+            };
+            const moduleFile: File = {
+                path: `${projectRoot}/src/somefolder/module1.ts`,
+                content: `
+export const x = 10;`
+            };
+            const configFile: File = {
+                path: `${projectRoot}/src/tsconfig.json`,
+                content: JSON.stringify({
+                    compilerOptions: {
+                        module: "amd",
+                        moduleResolution: "classic",
+                        target: "es5",
+                        outDir: "../out",
+                        baseUrl: "./",
+                        typeRoots: ["typings"]
+
+                    }
+                })
+            };
+            const files = [nodeFile, electronFile, srcFile, moduleFile, configFile, libFile];
+            const host = createServerHost(files);
+            const service = createProjectService(host);
+            service.openClientFile(srcFile.path, srcFile.content, ScriptKind.TS, projectRoot);
+            checkProjectActualFiles(service.configuredProjects.get(configFile.path)!, files.map(f => f.path));
+            checkWatchedFilesDetailed(host, mapDefined(files, f => f === srcFile ? undefined : f.path), 1);
+            checkWatchedDirectoriesDetailed(host, [`${projectRoot}`], 1,  /*recursive*/ false); // failed lookup for fs
+            const expectedWatchedDirectories = createMap<number>();
+            expectedWatchedDirectories.set(`${projectRoot}/src`, 2); // Wild card and failed lookup
+            expectedWatchedDirectories.set(`${projectRoot}/somefolder`, 1); // failed lookup for somefolder/module2
+            expectedWatchedDirectories.set(`${projectRoot}/node_modules`, 1); // failed lookup for with node_modules/@types/fs
+            expectedWatchedDirectories.set(`${projectRoot}/src/typings`, 1); // typeroot directory
+            checkWatchedDirectoriesDetailed(host, expectedWatchedDirectories, /*recursive*/ true);
+        });
     });
 
     describe("tsserverProjectSystem watchDirectories implementation", () => {
diff --git a/src/testRunner/unittests/versionCache.ts b/src/testRunner/unittests/versionCache.ts
index 82d6dafa1cf45..cc534b6fa5bcf 100644
--- a/src/testRunner/unittests/versionCache.ts
+++ b/src/testRunner/unittests/versionCache.ts
@@ -197,7 +197,7 @@ and grew 1cm per day`;
 
         before(() => {
             // Use scanner.ts, decent size, does not change frequently
-            const testFileName = "src/parser/scanner.ts";
+            const testFileName = "src/compiler/scanner.ts";
             testContent = Harness.IO.readFile(testFileName)!;
             const totalChars = testContent.length;
             assert.isTrue(totalChars > 0, "Failed to read test file.");
diff --git a/src/tsc/tsc.ts b/src/tsc/tsc.ts
index 93834a6ea5438..47d2c0b5c7412 100644
--- a/src/tsc/tsc.ts
+++ b/src/tsc/tsc.ts
@@ -58,7 +58,14 @@ namespace ts {
                 message: report,
                 errorDiagnostic: d => reportDiag(d)
             };
-            return performBuild(args.slice(1), createCompilerHost({}), buildHost, sys);
+            const result = performBuild(args.slice(1), createCompilerHost({}), buildHost, sys);
+            // undefined = in watch mode, do not exit
+            if (result !== undefined) {
+                return sys.exit(result);
+            }
+            else {
+                return;
+            }
         }
 
         const commandLine = parseCommandLine(args);
diff --git a/src/tsc/tsconfig.json b/src/tsc/tsconfig.json
index 630e9472109d9..8bc02279930ba 100644
--- a/src/tsc/tsconfig.json
+++ b/src/tsc/tsconfig.json
@@ -7,8 +7,6 @@
         "tsc.ts"
     ],
     "references": [
-        { "path": "../core", "prepend": true },
-        { "path": "../parser", "prepend": true },
         { "path": "../compiler", "prepend": true }
     ]
 }
diff --git a/src/tsc/tsconfig.release.json b/src/tsc/tsconfig.release.json
new file mode 100644
index 0000000000000..ca18e30277d8f
--- /dev/null
+++ b/src/tsc/tsconfig.release.json
@@ -0,0 +1,18 @@
+{
+    "extends": "../tsconfig-base",
+    "compilerOptions": {
+        "outFile": "../../lib/tsc.js",
+        "stripInternal": true,
+        "preserveConstEnums": false,
+        "declaration": false,
+        "declarationMap": false,
+        "sourceMap": false,
+        "composite": false
+    },
+    "files": [
+        "tsc.ts"
+    ],
+    "references": [
+        { "path": "../compiler/tsconfig.release.json", "prepend": true }
+    ]
+}
diff --git a/src/tsconfig-base.json b/src/tsconfig-base.json
index 8055b82b5032f..4aa4932a61af3 100644
--- a/src/tsconfig-base.json
+++ b/src/tsconfig-base.json
@@ -16,6 +16,8 @@
         "noUnusedLocals": true,
         "noUnusedParameters": true,
 
+        "skipLibCheck": true,
+
         "alwaysStrict": true,
         "preserveConstEnums": true,
         "newLine": "lf",
diff --git a/src/tsconfig.json b/src/tsconfig.json
index 72f9cecebacab..0c7f0c65da00b 100644
--- a/src/tsconfig.json
+++ b/src/tsconfig.json
@@ -4,7 +4,6 @@
     "references": [
         { "path": "./tsc" },
         { "path": "./tsserver" },
-        { "path": "./tsserverLibrary" },
         { "path": "./typingsInstaller" },
         { "path": "./watchGuard" },
         { "path": "./cancellationToken" },
diff --git a/src/tsserver/tsconfig.json b/src/tsserver/tsconfig.json
index 58b5512614841..8f14785cd4793 100644
--- a/src/tsserver/tsconfig.json
+++ b/src/tsserver/tsconfig.json
@@ -11,8 +11,6 @@
         "server.ts"
     ],
     "references": [
-        { "path": "../core", "prepend": true },
-        { "path": "../parser", "prepend": true },
         { "path": "../compiler", "prepend": true },
         { "path": "../services", "prepend": true },
         { "path": "../jsTyping", "prepend": true },
diff --git a/src/tsserverLibrary/empty.ts b/src/tsserverLibrary/empty.ts
deleted file mode 100644
index 80c90edcdd450..0000000000000
--- a/src/tsserverLibrary/empty.ts
+++ /dev/null
@@ -1 +0,0 @@
-// Workaround file, please delete once tsbuild understands it's not safe to skip this container
diff --git a/src/tsserverLibrary/tsconfig.json b/src/tsserverLibrary/tsconfig.json
deleted file mode 100644
index f7b9ff39ee3af..0000000000000
--- a/src/tsserverLibrary/tsconfig.json
+++ /dev/null
@@ -1,19 +0,0 @@
-{
-    "extends": "../tsconfig-base",
- 
-    "compilerOptions": {
-        "outFile": "../../built/local/tsserverlibrary.js",
-        "types": [
-            "node"
-        ]
-    },
-    "files": ["empty.ts"],
-    "references": [
-        { "path": "../core", "prepend": true },
-        { "path": "../parser", "prepend": true },
-        { "path": "../compiler", "prepend": true },
-        { "path": "../services", "prepend": true },
-        { "path": "../jsTyping", "prepend": true },
-        { "path": "../server", "prepend": true }
-    ]
-}
diff --git a/src/typescriptServices/empty.ts b/src/typescriptServices/empty.ts
deleted file mode 100644
index f911d153339aa..0000000000000
--- a/src/typescriptServices/empty.ts
+++ /dev/null
@@ -1 +0,0 @@
-// Delete soon
\ No newline at end of file
diff --git a/src/typescriptServices/tsconfig.json b/src/typescriptServices/tsconfig.json
deleted file mode 100644
index c8267fa828074..0000000000000
--- a/src/typescriptServices/tsconfig.json
+++ /dev/null
@@ -1,20 +0,0 @@
-{
-    "extends": "../tsconfig-base",
- 
-    "compilerOptions": {
-        "outFile": "../../built/local/typescriptServices.js",
-        "types": [
-            "node"
-        ]
-    },
-    "files": [
-        "empty.ts"
-    ],
-    "references": [
-        { "path": "../core", "prepend": true },
-        { "path": "../parser", "prepend": true },
-        { "path": "../compiler", "prepend": true },
-        { "path": "../jsTyping", "prepend": true },
-        { "path": "../services", "prepend": true },
-    ]
-}
diff --git a/src/typingsInstaller/tsconfig.json b/src/typingsInstaller/tsconfig.json
index e8af91d6a9171..675c045ba0003 100644
--- a/src/typingsInstaller/tsconfig.json
+++ b/src/typingsInstaller/tsconfig.json
@@ -12,8 +12,7 @@
         ]
     },
     "references": [
-        { "path": "../core", "prepend": true },
-        { "path": "../parser", "prepend": true },
+        { "path": "../compiler", "prepend": true },
         { "path": "../jsTyping", "prepend": true },
         { "path": "../typingsInstallerCore", "prepend": true }
     ],
diff --git a/src/typingsInstallerCore/tsconfig.json b/src/typingsInstallerCore/tsconfig.json
index 1c72a4e300899..2cc0d52d8de47 100644
--- a/src/typingsInstallerCore/tsconfig.json
+++ b/src/typingsInstallerCore/tsconfig.json
@@ -11,8 +11,7 @@
         ]
     },
     "references": [
-        { "path": "../core" },
-        { "path": "../parser" },
+        { "path": "../compiler" },
         { "path": "../jsTyping" }
     ],
     "files": [
diff --git a/tests/baselines/reference/APISample_Watch.errors.txt b/tests/baselines/reference/APISample_Watch.errors.txt
deleted file mode 100644
index 90827110dbb93..0000000000000
--- a/tests/baselines/reference/APISample_Watch.errors.txt
+++ /dev/null
@@ -1,208 +0,0 @@
-typescript_standalone.d.ts(21,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(21,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(8926,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(8926,42): error TS1005: ';' expected.
-typescript_standalone.d.ts(9186,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9186,46): error TS1005: ';' expected.
-typescript_standalone.d.ts(9536,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9536,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(9560,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9560,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(9647,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9647,38): error TS1005: ';' expected.
-typescript_standalone.d.ts(10812,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10812,57): error TS1005: ';' expected.
-typescript_standalone.d.ts(10823,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10823,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(10833,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10833,48): error TS1005: ';' expected.
-typescript_standalone.d.ts(10908,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10908,47): error TS1005: ';' expected.
-typescript_standalone.d.ts(10965,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10965,47): error TS1005: ';' expected.
-typescript_standalone.d.ts(11019,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11019,52): error TS1005: ';' expected.
-typescript_standalone.d.ts(11039,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11039,44): error TS1005: ';' expected.
-typescript_standalone.d.ts(11049,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11049,35): error TS1005: ';' expected.
-typescript_standalone.d.ts(11083,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11083,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11086,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11086,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11090,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11090,45): error TS1005: ';' expected.
-typescript_standalone.d.ts(11108,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11108,56): error TS1005: ';' expected.
-typescript_standalone.d.ts(11134,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11134,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(11137,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11137,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11149,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11149,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11179,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11179,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11213,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11213,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11224,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11224,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11248,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11248,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11256,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11256,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11260,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11260,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11290,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11290,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11333,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11333,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(11520,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11520,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11522,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11522,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11526,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11526,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11528,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11528,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11530,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11530,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11532,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11532,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11534,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11534,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11543,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11543,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11545,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11545,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11547,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11547,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11549,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11549,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11551,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11551,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11553,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11553,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11555,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11555,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11557,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11557,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11559,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11559,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11561,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11561,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11563,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11563,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11565,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11565,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11567,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11567,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11569,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11569,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11571,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11571,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11581,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11581,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11583,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11583,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11585,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11585,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11587,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11587,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11589,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11589,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11591,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11591,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11593,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11593,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11595,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11595,72): error TS1005: ';' expected.
-typescript_standalone.d.ts(11597,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11597,52): error TS1005: ';' expected.
-typescript_standalone.d.ts(11669,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11669,72): error TS1005: ';' expected.
-typescript_standalone.d.ts(11671,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11671,38): error TS1005: ';' expected.
-typescript_standalone.d.ts(11673,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11673,71): error TS1005: ';' expected.
-typescript_standalone.d.ts(11675,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11675,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11751,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11751,48): error TS1005: ';' expected.
-
-
-==== tests/cases/compiler/APISample_Watch.ts (0 errors) ====
-    /*
-     * Note: This test is a public API sample. The sample sources can be found
-             at: https://github.com/Microsoft/TypeScript-wiki/blob/master/Using-the-Compiler-API.md#writing-an-incremental-program-watcher
-     *       Please log a "breaking change" issue for any API breaking change affecting this issue
-     */
-    
-    declare var process: any;
-    declare var console: any;
-    declare var os: any;
-    
-    import ts = require("typescript");
-    
-    const formatHost: ts.FormatDiagnosticsHost = {
-        getCanonicalFileName: path => path,
-        getCurrentDirectory: ts.sys.getCurrentDirectory,
-        getNewLine: () => ts.sys.newLine,
-    }
-    
-    function watchMain() {
-        const configPath = ts.findConfigFile(/*searchPath*/ "./", ts.sys.fileExists, "tsconfig.json");
-        if (!configPath) {
-            throw new Error("Could not find a valid 'tsconfig.json'.");
-        }
-    
-        // TypeScript can use several different program creation "strategies":
-        //  * ts.createEmitAndSemanticDiagnosticsBuilderProgram,
-        //  * ts.createSemanticDiagnosticsBuilderProgram
-        //  * ts.createAbstractBuilder
-        // The first two produce "builder programs". These use an incremental strategy to only re-check and emit files whose
-        // contents may have changed, or whose dependencies may have changes which may impact change the result of prior type-check and emit.
-        // The last uses an ordinary program which does a full type check after every change.
-        // Between `createEmitAndSemanticDiagnosticsBuilderProgram` and `createSemanticDiagnosticsBuilderProgram`, the only difference is emit.
-        // For pure type-checking scenarios, or when another tool/process handles emit, using `createSemanticDiagnosticsBuilderProgram` may be more desirable.
-    
-        // Note that there is another overload for `createWatchCompilerHost` that takes a set of root files.
-        const host = ts.createWatchCompilerHost(configPath, {}, ts.sys,
-            ts.createSemanticDiagnosticsBuilderProgram,
-            reportDiagnostic,
-            reportWatchStatusChanged,
-        );
-    
-        // You can technically override any given hook on the host, though you probably don't need to.
-        // Note that we're assuming `origCreateProgram` and `origPostProgramCreate` doesn't use `this` at all.
-        const origCreateProgram = host.createProgram;
-        host.createProgram = (rootNames: ReadonlyArray<string>, options, host, oldProgram) => {
-            console.log("** We're about to create the program! **");
-            return origCreateProgram(rootNames, options, host, oldProgram);
-        }
-        const origPostProgramCreate = host.afterProgramCreate;
-    
-        host.afterProgramCreate = program => {
-            console.log("** We finished making the program! **");
-            origPostProgramCreate!(program);
-        };
-    
-        // `createWatchProgram` creates an initial program, watches files, and updates the program over time.
-        ts.createWatchProgram(host);
-    }
-    
-    function reportDiagnostic(diagnostic: ts.Diagnostic) {
-        console.error("Error", diagnostic.code, ":",
-            ts.flattenDiagnosticMessageText(diagnostic.messageText, formatHost.getNewLine())
-        );
-    }
-    
-    /**
-     * Prints a diagnostic every time the watch status changes.
-     * This is mainly for messages like "Starting compilation" or "Compilation completed".
-     */
-    function reportWatchStatusChanged(diagnostic: ts.Diagnostic) {
-        console.info(ts.formatDiagnostic(diagnostic, formatHost));
-    }
-    
-    watchMain();
-    
\ No newline at end of file
diff --git a/tests/baselines/reference/APISample_Watch.js b/tests/baselines/reference/APISample_Watch.js
index 5e3a67e827d2c..e675f2ec4eb47 100644
--- a/tests/baselines/reference/APISample_Watch.js
+++ b/tests/baselines/reference/APISample_Watch.js
@@ -1,7 +1,14 @@
+//// [tests/cases/compiler/APISample_Watch.ts] ////
+
+//// [index.d.ts]
+declare module "typescript" {
+    export = ts;
+}
+
 //// [APISample_Watch.ts]
 /*
  * Note: This test is a public API sample. The sample sources can be found
-         at: https://github.com/Microsoft/TypeScript-wiki/blob/master/Using-the-Compiler-API.md#writing-an-incremental-program-watcher
+ *       at: https://github.com/Microsoft/TypeScript-wiki/blob/master/Using-the-Compiler-API.md#writing-an-incremental-program-watcher
  *       Please log a "breaking change" issue for any API breaking change affecting this issue
  */
 
@@ -79,7 +86,7 @@ watchMain();
 "use strict";
 /*
  * Note: This test is a public API sample. The sample sources can be found
-         at: https://github.com/Microsoft/TypeScript-wiki/blob/master/Using-the-Compiler-API.md#writing-an-incremental-program-watcher
+ *       at: https://github.com/Microsoft/TypeScript-wiki/blob/master/Using-the-Compiler-API.md#writing-an-incremental-program-watcher
  *       Please log a "breaking change" issue for any API breaking change affecting this issue
  */
 exports.__esModule = true;
diff --git a/tests/baselines/reference/APISample_WatchWithDefaults.errors.txt b/tests/baselines/reference/APISample_WatchWithDefaults.errors.txt
deleted file mode 100644
index 3dad20dc09e25..0000000000000
--- a/tests/baselines/reference/APISample_WatchWithDefaults.errors.txt
+++ /dev/null
@@ -1,181 +0,0 @@
-typescript_standalone.d.ts(21,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(21,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(8926,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(8926,42): error TS1005: ';' expected.
-typescript_standalone.d.ts(9186,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9186,46): error TS1005: ';' expected.
-typescript_standalone.d.ts(9536,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9536,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(9560,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9560,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(9647,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9647,38): error TS1005: ';' expected.
-typescript_standalone.d.ts(10812,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10812,57): error TS1005: ';' expected.
-typescript_standalone.d.ts(10823,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10823,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(10833,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10833,48): error TS1005: ';' expected.
-typescript_standalone.d.ts(10908,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10908,47): error TS1005: ';' expected.
-typescript_standalone.d.ts(10965,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10965,47): error TS1005: ';' expected.
-typescript_standalone.d.ts(11019,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11019,52): error TS1005: ';' expected.
-typescript_standalone.d.ts(11039,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11039,44): error TS1005: ';' expected.
-typescript_standalone.d.ts(11049,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11049,35): error TS1005: ';' expected.
-typescript_standalone.d.ts(11083,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11083,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11086,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11086,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11090,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11090,45): error TS1005: ';' expected.
-typescript_standalone.d.ts(11108,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11108,56): error TS1005: ';' expected.
-typescript_standalone.d.ts(11134,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11134,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(11137,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11137,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11149,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11149,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11179,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11179,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11213,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11213,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11224,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11224,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11248,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11248,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11256,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11256,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11260,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11260,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11290,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11290,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11333,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11333,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(11520,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11520,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11522,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11522,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11526,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11526,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11528,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11528,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11530,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11530,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11532,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11532,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11534,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11534,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11543,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11543,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11545,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11545,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11547,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11547,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11549,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11549,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11551,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11551,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11553,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11553,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11555,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11555,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11557,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11557,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11559,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11559,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11561,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11561,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11563,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11563,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11565,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11565,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11567,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11567,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11569,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11569,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11571,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11571,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11581,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11581,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11583,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11583,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11585,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11585,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11587,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11587,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11589,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11589,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11591,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11591,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11593,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11593,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11595,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11595,72): error TS1005: ';' expected.
-typescript_standalone.d.ts(11597,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11597,52): error TS1005: ';' expected.
-typescript_standalone.d.ts(11669,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11669,72): error TS1005: ';' expected.
-typescript_standalone.d.ts(11671,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11671,38): error TS1005: ';' expected.
-typescript_standalone.d.ts(11673,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11673,71): error TS1005: ';' expected.
-typescript_standalone.d.ts(11675,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11675,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11751,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11751,48): error TS1005: ';' expected.
-
-
-==== tests/cases/compiler/APISample_WatchWithDefaults.ts (0 errors) ====
-    /*
-     * Note: This test is a public API sample. This uses default sys interface without having to pass anything
-     *       Please log a "breaking change" issue for any API breaking change affecting this issue
-     */
-    
-    declare var console: any;
-    
-    import ts = require("typescript");
-    
-    function watchMain() {
-        const configPath = ts.findConfigFile(/*searchPath*/ "./", ts.sys.fileExists, "tsconfig.json");
-        if (!configPath) {
-            throw new Error("Could not find a valid 'tsconfig.json'.");
-        }
-    
-        // TypeScript can use several different program creation "strategies":
-        //  * ts.createEmitAndSemanticDiagnosticsBuilderProgram,
-        //  * ts.createSemanticDiagnosticsBuilderProgram
-        //  * ts.createAbstractBuilder
-        // The first two produce "builder programs". These use an incremental strategy to only re-check and emit files whose
-        // contents may have changed, or whose dependencies may have changes which may impact change the result of prior type-check and emit.
-        // The last uses an ordinary program which does a full type check after every change.
-        // Between `createEmitAndSemanticDiagnosticsBuilderProgram` and `createSemanticDiagnosticsBuilderProgram`, the only difference is emit.
-        // For pure type-checking scenarios, or when another tool/process handles emit, using `createSemanticDiagnosticsBuilderProgram` may be more desirable.
-    
-        // Note that there is another overload for `createWatchCompilerHost` that takes a set of root files.
-        const host = ts.createWatchCompilerHost(configPath, {}, ts.sys);
-    
-        // You can technically override any given hook on the host, though you probably don't need to.
-        // Note that we're assuming `origCreateProgram` and `origPostProgramCreate` doesn't use `this` at all.
-        const origCreateProgram = host.createProgram;
-        host.createProgram = (rootNames, options, host, oldProgram) => {
-            console.log("** We're about to create the program! **");
-            return origCreateProgram(rootNames, options, host, oldProgram);
-        }
-        const origPostProgramCreate = host.afterProgramCreate;
-    
-        host.afterProgramCreate = program => {
-            console.log("** We finished making the program! **");
-            origPostProgramCreate!(program);
-        };
-    
-        // `createWatchProgram` creates an initial program, watches files, and updates the program over time.
-        ts.createWatchProgram(host);
-    }
-    
-    watchMain();
-    
\ No newline at end of file
diff --git a/tests/baselines/reference/APISample_WatchWithDefaults.js b/tests/baselines/reference/APISample_WatchWithDefaults.js
index 493bef221f689..63bfa4965e51e 100644
--- a/tests/baselines/reference/APISample_WatchWithDefaults.js
+++ b/tests/baselines/reference/APISample_WatchWithDefaults.js
@@ -1,3 +1,10 @@
+//// [tests/cases/compiler/APISample_WatchWithDefaults.ts] ////
+
+//// [index.d.ts]
+declare module "typescript" {
+    export = ts;
+}
+
 //// [APISample_WatchWithDefaults.ts]
 /*
  * Note: This test is a public API sample. This uses default sys interface without having to pass anything
diff --git a/tests/baselines/reference/APISample_WatchWithOwnWatchHost.errors.txt b/tests/baselines/reference/APISample_WatchWithOwnWatchHost.errors.txt
deleted file mode 100644
index 7616283940ab8..0000000000000
--- a/tests/baselines/reference/APISample_WatchWithOwnWatchHost.errors.txt
+++ /dev/null
@@ -1,188 +0,0 @@
-typescript_standalone.d.ts(21,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(21,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(8926,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(8926,42): error TS1005: ';' expected.
-typescript_standalone.d.ts(9186,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9186,46): error TS1005: ';' expected.
-typescript_standalone.d.ts(9536,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9536,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(9560,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9560,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(9647,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9647,38): error TS1005: ';' expected.
-typescript_standalone.d.ts(10812,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10812,57): error TS1005: ';' expected.
-typescript_standalone.d.ts(10823,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10823,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(10833,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10833,48): error TS1005: ';' expected.
-typescript_standalone.d.ts(10908,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10908,47): error TS1005: ';' expected.
-typescript_standalone.d.ts(10965,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10965,47): error TS1005: ';' expected.
-typescript_standalone.d.ts(11019,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11019,52): error TS1005: ';' expected.
-typescript_standalone.d.ts(11039,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11039,44): error TS1005: ';' expected.
-typescript_standalone.d.ts(11049,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11049,35): error TS1005: ';' expected.
-typescript_standalone.d.ts(11083,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11083,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11086,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11086,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11090,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11090,45): error TS1005: ';' expected.
-typescript_standalone.d.ts(11108,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11108,56): error TS1005: ';' expected.
-typescript_standalone.d.ts(11134,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11134,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(11137,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11137,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11149,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11149,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11179,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11179,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11213,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11213,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11224,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11224,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11248,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11248,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11256,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11256,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11260,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11260,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11290,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11290,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11333,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11333,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(11520,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11520,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11522,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11522,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11526,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11526,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11528,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11528,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11530,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11530,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11532,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11532,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11534,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11534,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11543,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11543,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11545,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11545,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11547,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11547,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11549,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11549,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11551,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11551,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11553,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11553,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11555,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11555,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11557,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11557,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11559,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11559,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11561,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11561,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11563,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11563,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11565,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11565,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11567,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11567,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11569,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11569,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11571,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11571,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11581,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11581,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11583,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11583,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11585,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11585,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11587,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11587,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11589,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11589,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11591,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11591,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11593,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11593,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11595,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11595,72): error TS1005: ';' expected.
-typescript_standalone.d.ts(11597,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11597,52): error TS1005: ';' expected.
-typescript_standalone.d.ts(11669,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11669,72): error TS1005: ';' expected.
-typescript_standalone.d.ts(11671,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11671,38): error TS1005: ';' expected.
-typescript_standalone.d.ts(11673,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11673,71): error TS1005: ';' expected.
-typescript_standalone.d.ts(11675,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11675,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11751,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11751,48): error TS1005: ';' expected.
-
-
-==== tests/cases/compiler/APISample_WatchWithOwnWatchHost.ts (0 errors) ====
-    /*
-     * Note: This test is a public API sample. This sample verifies creating abstract builder to watch list of root files 
-     *       Please log a "breaking change" issue for any API breaking change affecting this issue
-     */
-    
-    declare var console: any;
-    
-    import ts = require("typescript");
-    
-    function watchMain() {
-        // get list of files and compiler options somehow
-        const files: string[] = [];
-        const options: ts.CompilerOptions = {};
-    
-        const host: ts.WatchCompilerHostOfFilesAndCompilerOptions<ts.BuilderProgram> = {
-            rootFiles: files,
-            options,
-    
-            useCaseSensitiveFileNames: () => ts.sys.useCaseSensitiveFileNames,
-            getNewLine: () => ts.sys.newLine,
-            getCurrentDirectory: ts.sys.getCurrentDirectory,
-            getDefaultLibFileName: options => ts.getDefaultLibFilePath(options),
-    
-            fileExists: ts.sys.fileExists,
-            readFile: ts.sys.readFile,
-            directoryExists: ts.sys.directoryExists,
-            getDirectories: ts.sys.getDirectories,
-            readDirectory: ts.sys.readDirectory,
-            realpath: ts.sys.realpath,
-    
-            watchFile: ts.sys.watchFile!,
-            watchDirectory: ts.sys.watchDirectory!,
-            createProgram: ts.createAbstractBuilder
-        };
-    
-        // You can technically override any given hook on the host, though you probably don't need to.
-        // Note that we're assuming `origCreateProgram` and `origPostProgramCreate` doesn't use `this` at all.
-        const origCreateProgram = host.createProgram;
-        host.createProgram = (rootNames, options, host, oldProgram) => {
-            console.log("** We're about to create the program! **");
-            return origCreateProgram(rootNames, options, host, oldProgram);
-        }
-        const origPostProgramCreate = host.afterProgramCreate;
-    
-        host.afterProgramCreate = program => {
-            console.log("** We finished making the program! **");
-            origPostProgramCreate!(program);
-        };
-    
-        // `createWatchProgram` creates an initial program, watches files, and updates the program over time.
-        ts.createWatchProgram(host);
-    }
-    
-    watchMain();
-    
\ No newline at end of file
diff --git a/tests/baselines/reference/APISample_WatchWithOwnWatchHost.js b/tests/baselines/reference/APISample_WatchWithOwnWatchHost.js
index 95f6df3fb5147..75444a614f952 100644
--- a/tests/baselines/reference/APISample_WatchWithOwnWatchHost.js
+++ b/tests/baselines/reference/APISample_WatchWithOwnWatchHost.js
@@ -1,6 +1,13 @@
+//// [tests/cases/compiler/APISample_WatchWithOwnWatchHost.ts] ////
+
+//// [index.d.ts]
+declare module "typescript" {
+    export = ts;
+}
+
 //// [APISample_WatchWithOwnWatchHost.ts]
 /*
- * Note: This test is a public API sample. This sample verifies creating abstract builder to watch list of root files 
+ * Note: This test is a public API sample. This sample verifies creating abstract builder to watch list of root files
  *       Please log a "breaking change" issue for any API breaking change affecting this issue
  */
 
diff --git a/tests/baselines/reference/APISample_compile.errors.txt b/tests/baselines/reference/APISample_compile.errors.txt
deleted file mode 100644
index 050230e7cffc1..0000000000000
--- a/tests/baselines/reference/APISample_compile.errors.txt
+++ /dev/null
@@ -1,171 +0,0 @@
-typescript_standalone.d.ts(21,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(21,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(8926,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(8926,42): error TS1005: ';' expected.
-typescript_standalone.d.ts(9186,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9186,46): error TS1005: ';' expected.
-typescript_standalone.d.ts(9536,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9536,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(9560,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9560,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(9647,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9647,38): error TS1005: ';' expected.
-typescript_standalone.d.ts(10812,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10812,57): error TS1005: ';' expected.
-typescript_standalone.d.ts(10823,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10823,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(10833,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10833,48): error TS1005: ';' expected.
-typescript_standalone.d.ts(10908,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10908,47): error TS1005: ';' expected.
-typescript_standalone.d.ts(10965,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10965,47): error TS1005: ';' expected.
-typescript_standalone.d.ts(11019,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11019,52): error TS1005: ';' expected.
-typescript_standalone.d.ts(11039,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11039,44): error TS1005: ';' expected.
-typescript_standalone.d.ts(11049,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11049,35): error TS1005: ';' expected.
-typescript_standalone.d.ts(11083,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11083,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11086,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11086,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11090,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11090,45): error TS1005: ';' expected.
-typescript_standalone.d.ts(11108,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11108,56): error TS1005: ';' expected.
-typescript_standalone.d.ts(11134,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11134,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(11137,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11137,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11149,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11149,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11179,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11179,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11213,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11213,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11224,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11224,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11248,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11248,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11256,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11256,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11260,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11260,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11290,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11290,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11333,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11333,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(11520,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11520,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11522,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11522,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11526,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11526,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11528,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11528,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11530,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11530,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11532,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11532,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11534,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11534,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11543,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11543,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11545,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11545,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11547,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11547,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11549,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11549,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11551,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11551,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11553,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11553,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11555,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11555,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11557,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11557,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11559,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11559,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11561,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11561,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11563,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11563,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11565,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11565,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11567,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11567,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11569,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11569,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11571,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11571,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11581,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11581,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11583,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11583,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11585,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11585,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11587,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11587,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11589,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11589,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11591,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11591,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11593,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11593,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11595,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11595,72): error TS1005: ';' expected.
-typescript_standalone.d.ts(11597,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11597,52): error TS1005: ';' expected.
-typescript_standalone.d.ts(11669,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11669,72): error TS1005: ';' expected.
-typescript_standalone.d.ts(11671,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11671,38): error TS1005: ';' expected.
-typescript_standalone.d.ts(11673,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11673,71): error TS1005: ';' expected.
-typescript_standalone.d.ts(11675,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11675,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11751,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11751,48): error TS1005: ';' expected.
-
-
-==== tests/cases/compiler/APISample_compile.ts (0 errors) ====
-    /*
-     * Note: This test is a public API sample. The sample sources can be found
-             at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#a-minimal-compiler
-     *       Please log a "breaking change" issue for any API breaking change affecting this issue
-     */
-    
-    declare var process: any;
-    declare var console: any;
-    declare var os: any;
-    
-    import ts = require("typescript");
-    
-    export function compile(fileNames: string[], options: ts.CompilerOptions): void {
-        var program = ts.createProgram(fileNames, options);
-        var emitResult = program.emit();
-    
-        var allDiagnostics = ts.getPreEmitDiagnostics(program);
-    
-        allDiagnostics.forEach(diagnostic => {
-            var message = ts.flattenDiagnosticMessageText(diagnostic.messageText, '\n');
-            if (!diagnostic.file) {
-                console.log(message);
-                return;
-            }
-            var { line, character } = diagnostic.file.getLineAndCharacterOfPosition(diagnostic.start!);
-            console.log(`${diagnostic.file.fileName} (${line + 1},${character + 1}): ${message}`);
-        });
-    
-        var exitCode = emitResult.emitSkipped ? 1 : 0;
-        console.log(`Process exiting with code '${exitCode}'.`);
-        process.exit(exitCode);
-    }
-    
-    compile(process.argv.slice(2), {
-        noEmitOnError: true, noImplicitAny: true,
-        target: ts.ScriptTarget.ES5, module: ts.ModuleKind.CommonJS
-    });
-    
\ No newline at end of file
diff --git a/tests/baselines/reference/APISample_compile.js b/tests/baselines/reference/APISample_compile.js
index 35d4935045777..5cae4df2c38b2 100644
--- a/tests/baselines/reference/APISample_compile.js
+++ b/tests/baselines/reference/APISample_compile.js
@@ -1,7 +1,14 @@
+//// [tests/cases/compiler/APISample_compile.ts] ////
+
+//// [index.d.ts]
+declare module "typescript" {
+    export = ts;
+}
+
 //// [APISample_compile.ts]
 /*
  * Note: This test is a public API sample. The sample sources can be found
-         at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#a-minimal-compiler
+ *       at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#a-minimal-compiler
  *       Please log a "breaking change" issue for any API breaking change affecting this issue
  */
 
@@ -42,7 +49,7 @@ compile(process.argv.slice(2), {
 "use strict";
 /*
  * Note: This test is a public API sample. The sample sources can be found
-         at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#a-minimal-compiler
+ *       at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#a-minimal-compiler
  *       Please log a "breaking change" issue for any API breaking change affecting this issue
  */
 exports.__esModule = true;
diff --git a/tests/baselines/reference/APISample_jsdoc.errors.txt b/tests/baselines/reference/APISample_jsdoc.errors.txt
deleted file mode 100644
index af33a5aa63635..0000000000000
--- a/tests/baselines/reference/APISample_jsdoc.errors.txt
+++ /dev/null
@@ -1,246 +0,0 @@
-typescript_standalone.d.ts(21,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(21,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(8926,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(8926,42): error TS1005: ';' expected.
-typescript_standalone.d.ts(9186,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9186,46): error TS1005: ';' expected.
-typescript_standalone.d.ts(9536,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9536,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(9560,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9560,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(9647,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9647,38): error TS1005: ';' expected.
-typescript_standalone.d.ts(10812,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10812,57): error TS1005: ';' expected.
-typescript_standalone.d.ts(10823,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10823,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(10833,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10833,48): error TS1005: ';' expected.
-typescript_standalone.d.ts(10908,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10908,47): error TS1005: ';' expected.
-typescript_standalone.d.ts(10965,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10965,47): error TS1005: ';' expected.
-typescript_standalone.d.ts(11019,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11019,52): error TS1005: ';' expected.
-typescript_standalone.d.ts(11039,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11039,44): error TS1005: ';' expected.
-typescript_standalone.d.ts(11049,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11049,35): error TS1005: ';' expected.
-typescript_standalone.d.ts(11083,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11083,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11086,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11086,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11090,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11090,45): error TS1005: ';' expected.
-typescript_standalone.d.ts(11108,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11108,56): error TS1005: ';' expected.
-typescript_standalone.d.ts(11134,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11134,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(11137,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11137,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11149,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11149,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11179,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11179,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11213,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11213,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11224,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11224,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11248,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11248,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11256,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11256,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11260,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11260,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11290,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11290,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11333,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11333,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(11520,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11520,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11522,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11522,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11526,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11526,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11528,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11528,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11530,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11530,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11532,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11532,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11534,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11534,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11543,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11543,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11545,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11545,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11547,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11547,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11549,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11549,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11551,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11551,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11553,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11553,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11555,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11555,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11557,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11557,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11559,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11559,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11561,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11561,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11563,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11563,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11565,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11565,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11567,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11567,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11569,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11569,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11571,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11571,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11581,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11581,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11583,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11583,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11585,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11585,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11587,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11587,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11589,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11589,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11591,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11591,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11593,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11593,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11595,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11595,72): error TS1005: ';' expected.
-typescript_standalone.d.ts(11597,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11597,52): error TS1005: ';' expected.
-typescript_standalone.d.ts(11669,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11669,72): error TS1005: ';' expected.
-typescript_standalone.d.ts(11671,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11671,38): error TS1005: ';' expected.
-typescript_standalone.d.ts(11673,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11673,71): error TS1005: ';' expected.
-typescript_standalone.d.ts(11675,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11675,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11751,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11751,48): error TS1005: ';' expected.
-
-
-==== tests/cases/compiler/APISample_jsdoc.ts (0 errors) ====
-    /*
-     * Note: This test is a public API sample. The original sources can be found
-     *       at: https://github.com/YousefED/typescript-json-schema
-     *           https://github.com/vega/ts-json-schema-generator
-     *       Please log a "breaking change" issue for any API breaking change affecting this issue
-     */
-    
-    declare var console: any;
-    
-    import * as ts from "typescript";
-    
-    // excerpted from https://github.com/YousefED/typescript-json-schema
-    // (converted from a method and modified; for example, `this: any` to compensate, among other changes)
-    function parseCommentsIntoDefinition(this: any,
-                                         symbol: ts.Symbol,
-                                         definition: {description?: string, [s: string]: string | undefined},
-                                         otherAnnotations: { [s: string]: true}): void {
-        if (!symbol) {
-            return;
-        }
-    
-        // the comments for a symbol
-        let comments = symbol.getDocumentationComment(undefined);
-    
-        if (comments.length) {
-            definition.description = comments.map(comment => comment.kind === "lineBreak" ? comment.text : comment.text.trim().replace(/\r\n/g, "\n")).join("");
-        }
-    
-        // jsdocs are separate from comments
-        const jsdocs = symbol.getJsDocTags();
-        jsdocs.forEach(doc => {
-            // if we have @TJS-... annotations, we have to parse them
-            const { name, text } = doc;
-            if (this.userValidationKeywords[name]) {
-                definition[name] = this.parseValue(text);
-            } else {
-                // special annotations
-                otherAnnotations[doc.name] = true;
-            }
-        });
-    }
-    
-    
-    // excerpted from https://github.com/vega/ts-json-schema-generator
-    export interface Annotations {
-        [name: string]: any;
-    }
-    function getAnnotations(this: any, node: ts.Node): Annotations | undefined {
-        const symbol: ts.Symbol = (node as any).symbol;
-        if (!symbol) {
-            return undefined;
-        }
-    
-        const jsDocTags: ts.JSDocTagInfo[] = symbol.getJsDocTags();
-        if (!jsDocTags || !jsDocTags.length) {
-            return undefined;
-        }
-    
-        const annotations: Annotations = jsDocTags.reduce((result: Annotations, jsDocTag: ts.JSDocTagInfo) => {
-            const value = this.parseJsDocTag(jsDocTag);
-            if (value !== undefined) {
-                result[jsDocTag.name] = value;
-            }
-    
-            return result;
-        }, {});
-        return Object.keys(annotations).length ? annotations : undefined;
-    }
-    
-    // these examples are artificial and mostly nonsensical
-    function parseSpecificTags(node: ts.Node) {
-        if (node.kind === ts.SyntaxKind.Parameter) {
-            return ts.getJSDocParameterTags(node as ts.ParameterDeclaration);
-        }
-        if (node.kind === ts.SyntaxKind.FunctionDeclaration) {
-            const func = node as ts.FunctionDeclaration;
-            if (ts.hasJSDocParameterTags(func)) {
-                const flat: ts.JSDocTag[] = [];
-                for (const tags of func.parameters.map(ts.getJSDocParameterTags)) {
-                    if (tags) flat.push(...tags);
-                }
-                return flat;
-            }
-        }
-    }
-    
-    function getReturnTypeFromJSDoc(node: ts.Node) {
-        if (node.kind === ts.SyntaxKind.FunctionDeclaration) {
-            return ts.getJSDocReturnType(node);
-        }
-        let type = ts.getJSDocType(node);
-        if (type && type.kind === ts.SyntaxKind.FunctionType) {
-            return (type as ts.FunctionTypeNode).type;
-        }
-    }
-    
-    function getAllTags(node: ts.Node) {
-        ts.getJSDocTags(node);
-    }
-    
-    function getSomeOtherTags(node: ts.Node) {
-        const tags: (ts.JSDocTag | undefined)[] = [];
-        tags.push(ts.getJSDocAugmentsTag(node));
-        tags.push(ts.getJSDocClassTag(node));
-        tags.push(ts.getJSDocReturnTag(node));
-        const type = ts.getJSDocTypeTag(node);
-        if (type) {
-            tags.push(type);
-        }
-        tags.push(ts.getJSDocTemplateTag(node));
-        return tags;
-    }
-    
\ No newline at end of file
diff --git a/tests/baselines/reference/APISample_jsdoc.js b/tests/baselines/reference/APISample_jsdoc.js
index f28b16d88b60c..9c1dd5f824fdb 100644
--- a/tests/baselines/reference/APISample_jsdoc.js
+++ b/tests/baselines/reference/APISample_jsdoc.js
@@ -1,3 +1,10 @@
+//// [tests/cases/compiler/APISample_jsdoc.ts] ////
+
+//// [index.d.ts]
+declare module "typescript" {
+    export = ts;
+}
+
 //// [APISample_jsdoc.ts]
 /*
  * Note: This test is a public API sample. The original sources can be found
diff --git a/tests/baselines/reference/APISample_linter.errors.txt b/tests/baselines/reference/APISample_linter.errors.txt
deleted file mode 100644
index 1df6775939fde..0000000000000
--- a/tests/baselines/reference/APISample_linter.errors.txt
+++ /dev/null
@@ -1,196 +0,0 @@
-typescript_standalone.d.ts(21,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(21,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(8926,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(8926,42): error TS1005: ';' expected.
-typescript_standalone.d.ts(9186,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9186,46): error TS1005: ';' expected.
-typescript_standalone.d.ts(9536,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9536,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(9560,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9560,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(9647,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9647,38): error TS1005: ';' expected.
-typescript_standalone.d.ts(10812,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10812,57): error TS1005: ';' expected.
-typescript_standalone.d.ts(10823,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10823,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(10833,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10833,48): error TS1005: ';' expected.
-typescript_standalone.d.ts(10908,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10908,47): error TS1005: ';' expected.
-typescript_standalone.d.ts(10965,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10965,47): error TS1005: ';' expected.
-typescript_standalone.d.ts(11019,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11019,52): error TS1005: ';' expected.
-typescript_standalone.d.ts(11039,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11039,44): error TS1005: ';' expected.
-typescript_standalone.d.ts(11049,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11049,35): error TS1005: ';' expected.
-typescript_standalone.d.ts(11083,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11083,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11086,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11086,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11090,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11090,45): error TS1005: ';' expected.
-typescript_standalone.d.ts(11108,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11108,56): error TS1005: ';' expected.
-typescript_standalone.d.ts(11134,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11134,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(11137,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11137,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11149,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11149,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11179,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11179,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11213,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11213,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11224,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11224,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11248,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11248,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11256,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11256,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11260,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11260,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11290,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11290,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11333,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11333,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(11520,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11520,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11522,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11522,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11526,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11526,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11528,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11528,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11530,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11530,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11532,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11532,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11534,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11534,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11543,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11543,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11545,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11545,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11547,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11547,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11549,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11549,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11551,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11551,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11553,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11553,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11555,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11555,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11557,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11557,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11559,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11559,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11561,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11561,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11563,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11563,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11565,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11565,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11567,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11567,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11569,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11569,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11571,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11571,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11581,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11581,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11583,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11583,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11585,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11585,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11587,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11587,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11589,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11589,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11591,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11591,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11593,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11593,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11595,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11595,72): error TS1005: ';' expected.
-typescript_standalone.d.ts(11597,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11597,52): error TS1005: ';' expected.
-typescript_standalone.d.ts(11669,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11669,72): error TS1005: ';' expected.
-typescript_standalone.d.ts(11671,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11671,38): error TS1005: ';' expected.
-typescript_standalone.d.ts(11673,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11673,71): error TS1005: ';' expected.
-typescript_standalone.d.ts(11675,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11675,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11751,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11751,48): error TS1005: ';' expected.
-
-
-==== tests/cases/compiler/APISample_linter.ts (0 errors) ====
-    /*
-     * Note: This test is a public API sample. The sample sources can be found 
-             at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#traversing-the-ast-with-a-little-linter
-     *       Please log a "breaking change" issue for any API breaking change affecting this issue
-     */
-    
-    declare var process: any;
-    declare var console: any;
-    declare var readFileSync: any;
-    
-    import * as ts from "typescript";
-    
-    export function delint(sourceFile: ts.SourceFile) {
-        delintNode(sourceFile);
-    
-        function delintNode(node: ts.Node) {
-            switch (node.kind) {
-                case ts.SyntaxKind.ForStatement:
-                case ts.SyntaxKind.ForInStatement:
-                case ts.SyntaxKind.WhileStatement:
-                case ts.SyntaxKind.DoStatement:
-                    if ((<ts.IterationStatement>node).statement.kind !== ts.SyntaxKind.Block) {
-                        report(node, "A looping statement's contents should be wrapped in a block body.");
-                    }
-                    break;
-    
-                case ts.SyntaxKind.IfStatement:
-                    let ifStatement = (<ts.IfStatement>node);
-                    if (ifStatement.thenStatement.kind !== ts.SyntaxKind.Block) {
-                        report(ifStatement.thenStatement, "An if statement's contents should be wrapped in a block body.");
-                    }
-                    if (ifStatement.elseStatement &&
-                        ifStatement.elseStatement.kind !== ts.SyntaxKind.Block &&
-                        ifStatement.elseStatement.kind !== ts.SyntaxKind.IfStatement) {
-                        report(ifStatement.elseStatement, "An else statement's contents should be wrapped in a block body.");
-                    }
-                    break;
-    
-                case ts.SyntaxKind.BinaryExpression:
-                    let op = (<ts.BinaryExpression>node).operatorToken.kind;
-                    if (op === ts.SyntaxKind.EqualsEqualsToken || op == ts.SyntaxKind.ExclamationEqualsToken) {
-                        report(node, "Use '===' and '!=='.")
-                    }
-                    break;
-            }
-    
-            ts.forEachChild(node, delintNode);
-        }
-    
-        function report(node: ts.Node, message: string) {
-            let { line, character } = sourceFile.getLineAndCharacterOfPosition(node.getStart());
-            console.log(`${sourceFile.fileName} (${line + 1},${character + 1}): ${message}`);
-        }
-    }
-    
-    const fileNames: string[] = process.argv.slice(2);
-    fileNames.forEach(fileName => {
-        // Parse a file
-        let sourceFile = ts.createSourceFile(fileName, readFileSync(fileName).toString(), ts.ScriptTarget.ES2015, /*setParentNodes */ true);
-    
-        // delint it
-        delint(sourceFile);
-    });
\ No newline at end of file
diff --git a/tests/baselines/reference/APISample_linter.js b/tests/baselines/reference/APISample_linter.js
index 51b208c39c902..ea9c018c1a1d6 100644
--- a/tests/baselines/reference/APISample_linter.js
+++ b/tests/baselines/reference/APISample_linter.js
@@ -1,7 +1,14 @@
+//// [tests/cases/compiler/APISample_linter.ts] ////
+
+//// [index.d.ts]
+declare module "typescript" {
+    export = ts;
+}
+
 //// [APISample_linter.ts]
 /*
- * Note: This test is a public API sample. The sample sources can be found 
-         at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#traversing-the-ast-with-a-little-linter
+ * Note: This test is a public API sample. The sample sources can be found
+ *       at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#traversing-the-ast-with-a-little-linter
  *       Please log a "breaking change" issue for any API breaking change affecting this issue
  */
 
@@ -67,7 +74,7 @@ fileNames.forEach(fileName => {
 "use strict";
 /*
  * Note: This test is a public API sample. The sample sources can be found
-         at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#traversing-the-ast-with-a-little-linter
+ *       at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#traversing-the-ast-with-a-little-linter
  *       Please log a "breaking change" issue for any API breaking change affecting this issue
  */
 exports.__esModule = true;
diff --git a/tests/baselines/reference/APISample_parseConfig.errors.txt b/tests/baselines/reference/APISample_parseConfig.errors.txt
deleted file mode 100644
index 21834a3d49d93..0000000000000
--- a/tests/baselines/reference/APISample_parseConfig.errors.txt
+++ /dev/null
@@ -1,168 +0,0 @@
-typescript_standalone.d.ts(21,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(21,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(8926,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(8926,42): error TS1005: ';' expected.
-typescript_standalone.d.ts(9186,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9186,46): error TS1005: ';' expected.
-typescript_standalone.d.ts(9536,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9536,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(9560,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9560,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(9647,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9647,38): error TS1005: ';' expected.
-typescript_standalone.d.ts(10812,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10812,57): error TS1005: ';' expected.
-typescript_standalone.d.ts(10823,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10823,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(10833,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10833,48): error TS1005: ';' expected.
-typescript_standalone.d.ts(10908,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10908,47): error TS1005: ';' expected.
-typescript_standalone.d.ts(10965,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10965,47): error TS1005: ';' expected.
-typescript_standalone.d.ts(11019,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11019,52): error TS1005: ';' expected.
-typescript_standalone.d.ts(11039,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11039,44): error TS1005: ';' expected.
-typescript_standalone.d.ts(11049,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11049,35): error TS1005: ';' expected.
-typescript_standalone.d.ts(11083,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11083,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11086,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11086,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11090,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11090,45): error TS1005: ';' expected.
-typescript_standalone.d.ts(11108,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11108,56): error TS1005: ';' expected.
-typescript_standalone.d.ts(11134,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11134,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(11137,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11137,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11149,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11149,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11179,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11179,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11213,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11213,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11224,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11224,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11248,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11248,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11256,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11256,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11260,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11260,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11290,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11290,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11333,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11333,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(11520,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11520,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11522,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11522,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11526,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11526,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11528,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11528,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11530,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11530,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11532,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11532,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11534,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11534,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11543,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11543,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11545,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11545,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11547,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11547,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11549,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11549,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11551,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11551,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11553,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11553,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11555,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11555,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11557,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11557,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11559,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11559,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11561,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11561,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11563,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11563,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11565,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11565,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11567,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11567,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11569,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11569,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11571,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11571,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11581,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11581,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11583,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11583,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11585,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11585,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11587,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11587,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11589,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11589,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11591,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11591,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11593,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11593,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11595,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11595,72): error TS1005: ';' expected.
-typescript_standalone.d.ts(11597,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11597,52): error TS1005: ';' expected.
-typescript_standalone.d.ts(11669,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11669,72): error TS1005: ';' expected.
-typescript_standalone.d.ts(11671,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11671,38): error TS1005: ';' expected.
-typescript_standalone.d.ts(11673,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11673,71): error TS1005: ';' expected.
-typescript_standalone.d.ts(11675,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11675,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11751,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11751,48): error TS1005: ';' expected.
-
-
-==== tests/cases/compiler/APISample_parseConfig.ts (0 errors) ====
-    /*
-     * Note: This test is a public API sample. The sample sources can be found 
-             at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#a-minimal-compiler
-     *       Please log a "breaking change" issue for any API breaking change affecting this issue
-     */
-    
-    declare var process: any;
-    declare var console: any;
-    declare var os: any;
-    
-    import ts = require("typescript");
-    
-    function printError(error: ts.Diagnostic): void {
-        if (!error) {
-            return;
-        }
-        console.log(`${error.file && error.file.fileName}: ${error.messageText}`);
-    }
-    
-    export function createProgram(rootFiles: string[], compilerOptionsJson: string): ts.Program | undefined {
-        const { config, error } = ts.parseConfigFileTextToJson("tsconfig.json", compilerOptionsJson)
-        if (error) {
-            printError(error);
-            return undefined;
-        }
-        const basePath: string = process.cwd();
-        const settings = ts.convertCompilerOptionsFromJson(config.config["compilerOptions"], basePath);
-        if (!settings.options) {
-            for (const err of settings.errors) {
-                printError(err);
-            }
-            return undefined;
-        }
-        return ts.createProgram(rootFiles, settings.options);
-    }
\ No newline at end of file
diff --git a/tests/baselines/reference/APISample_parseConfig.js b/tests/baselines/reference/APISample_parseConfig.js
index 690efb359c641..661376f647eba 100644
--- a/tests/baselines/reference/APISample_parseConfig.js
+++ b/tests/baselines/reference/APISample_parseConfig.js
@@ -1,7 +1,14 @@
+//// [tests/cases/compiler/APISample_parseConfig.ts] ////
+
+//// [index.d.ts]
+declare module "typescript" {
+    export = ts;
+}
+
 //// [APISample_parseConfig.ts]
 /*
- * Note: This test is a public API sample. The sample sources can be found 
-         at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#a-minimal-compiler
+ * Note: This test is a public API sample. The sample sources can be found
+ *       at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#a-minimal-compiler
  *       Please log a "breaking change" issue for any API breaking change affecting this issue
  */
 
@@ -39,7 +46,7 @@ export function createProgram(rootFiles: string[], compilerOptionsJson: string):
 "use strict";
 /*
  * Note: This test is a public API sample. The sample sources can be found
-         at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#a-minimal-compiler
+ *       at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#a-minimal-compiler
  *       Please log a "breaking change" issue for any API breaking change affecting this issue
  */
 exports.__esModule = true;
diff --git a/tests/baselines/reference/APISample_transform.errors.txt b/tests/baselines/reference/APISample_transform.errors.txt
deleted file mode 100644
index 6a27c9813e2f1..0000000000000
--- a/tests/baselines/reference/APISample_transform.errors.txt
+++ /dev/null
@@ -1,148 +0,0 @@
-typescript_standalone.d.ts(21,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(21,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(8926,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(8926,42): error TS1005: ';' expected.
-typescript_standalone.d.ts(9186,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9186,46): error TS1005: ';' expected.
-typescript_standalone.d.ts(9536,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9536,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(9560,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9560,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(9647,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9647,38): error TS1005: ';' expected.
-typescript_standalone.d.ts(10812,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10812,57): error TS1005: ';' expected.
-typescript_standalone.d.ts(10823,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10823,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(10833,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10833,48): error TS1005: ';' expected.
-typescript_standalone.d.ts(10908,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10908,47): error TS1005: ';' expected.
-typescript_standalone.d.ts(10965,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10965,47): error TS1005: ';' expected.
-typescript_standalone.d.ts(11019,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11019,52): error TS1005: ';' expected.
-typescript_standalone.d.ts(11039,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11039,44): error TS1005: ';' expected.
-typescript_standalone.d.ts(11049,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11049,35): error TS1005: ';' expected.
-typescript_standalone.d.ts(11083,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11083,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11086,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11086,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11090,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11090,45): error TS1005: ';' expected.
-typescript_standalone.d.ts(11108,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11108,56): error TS1005: ';' expected.
-typescript_standalone.d.ts(11134,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11134,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(11137,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11137,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11149,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11149,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11179,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11179,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11213,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11213,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11224,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11224,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11248,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11248,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11256,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11256,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11260,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11260,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11290,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11290,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11333,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11333,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(11520,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11520,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11522,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11522,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11526,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11526,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11528,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11528,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11530,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11530,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11532,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11532,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11534,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11534,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11543,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11543,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11545,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11545,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11547,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11547,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11549,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11549,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11551,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11551,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11553,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11553,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11555,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11555,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11557,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11557,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11559,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11559,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11561,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11561,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11563,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11563,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11565,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11565,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11567,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11567,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11569,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11569,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11571,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11571,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11581,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11581,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11583,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11583,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11585,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11585,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11587,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11587,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11589,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11589,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11591,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11591,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11593,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11593,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11595,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11595,72): error TS1005: ';' expected.
-typescript_standalone.d.ts(11597,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11597,52): error TS1005: ';' expected.
-typescript_standalone.d.ts(11669,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11669,72): error TS1005: ';' expected.
-typescript_standalone.d.ts(11671,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11671,38): error TS1005: ';' expected.
-typescript_standalone.d.ts(11673,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11673,71): error TS1005: ';' expected.
-typescript_standalone.d.ts(11675,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11675,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11751,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11751,48): error TS1005: ';' expected.
-
-
-==== tests/cases/compiler/APISample_transform.ts (0 errors) ====
-    /*
-     * Note: This test is a public API sample. The sample sources can be found 
-             at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#a-simple-transform-function
-     *       Please log a "breaking change" issue for any API breaking change affecting this issue
-     */
-    
-    declare var console: any;
-    
-    import * as ts from "typescript";
-    
-    const source = "let x: string  = 'string'";
-    
-    let result = ts.transpile(source, { module: ts.ModuleKind.CommonJS });
-    
-    console.log(JSON.stringify(result));
\ No newline at end of file
diff --git a/tests/baselines/reference/APISample_transform.js b/tests/baselines/reference/APISample_transform.js
index 47f63f56e704b..db25c1bd1dd06 100644
--- a/tests/baselines/reference/APISample_transform.js
+++ b/tests/baselines/reference/APISample_transform.js
@@ -1,7 +1,14 @@
+//// [tests/cases/compiler/APISample_transform.ts] ////
+
+//// [index.d.ts]
+declare module "typescript" {
+    export = ts;
+}
+
 //// [APISample_transform.ts]
 /*
- * Note: This test is a public API sample. The sample sources can be found 
-         at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#a-simple-transform-function
+ * Note: This test is a public API sample. The sample sources can be found
+ *       at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#a-simple-transform-function
  *       Please log a "breaking change" issue for any API breaking change affecting this issue
  */
 
@@ -19,7 +26,7 @@ console.log(JSON.stringify(result));
 "use strict";
 /*
  * Note: This test is a public API sample. The sample sources can be found
-         at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#a-simple-transform-function
+ *       at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#a-simple-transform-function
  *       Please log a "breaking change" issue for any API breaking change affecting this issue
  */
 exports.__esModule = true;
diff --git a/tests/baselines/reference/APISample_watcher.errors.txt b/tests/baselines/reference/APISample_watcher.errors.txt
deleted file mode 100644
index 44c5c342cff18..0000000000000
--- a/tests/baselines/reference/APISample_watcher.errors.txt
+++ /dev/null
@@ -1,242 +0,0 @@
-typescript_standalone.d.ts(21,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(21,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(8926,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(8926,42): error TS1005: ';' expected.
-typescript_standalone.d.ts(9186,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9186,46): error TS1005: ';' expected.
-typescript_standalone.d.ts(9536,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9536,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(9560,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9560,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(9647,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(9647,38): error TS1005: ';' expected.
-typescript_standalone.d.ts(10812,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10812,57): error TS1005: ';' expected.
-typescript_standalone.d.ts(10823,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10823,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(10833,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10833,48): error TS1005: ';' expected.
-typescript_standalone.d.ts(10908,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10908,47): error TS1005: ';' expected.
-typescript_standalone.d.ts(10965,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(10965,47): error TS1005: ';' expected.
-typescript_standalone.d.ts(11019,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11019,52): error TS1005: ';' expected.
-typescript_standalone.d.ts(11039,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11039,44): error TS1005: ';' expected.
-typescript_standalone.d.ts(11049,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11049,35): error TS1005: ';' expected.
-typescript_standalone.d.ts(11083,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11083,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11086,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11086,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11090,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11090,45): error TS1005: ';' expected.
-typescript_standalone.d.ts(11108,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11108,56): error TS1005: ';' expected.
-typescript_standalone.d.ts(11134,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11134,36): error TS1005: ';' expected.
-typescript_standalone.d.ts(11137,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11137,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11149,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11149,43): error TS1005: ';' expected.
-typescript_standalone.d.ts(11179,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11179,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11213,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11213,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11224,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11224,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11248,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11248,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11256,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11256,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11260,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11260,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11290,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11290,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11333,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11333,41): error TS1005: ';' expected.
-typescript_standalone.d.ts(11520,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11520,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11522,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11522,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11526,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11526,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11528,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11528,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11530,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11530,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11532,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11532,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11534,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11534,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11543,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11543,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11545,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11545,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11547,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11547,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11549,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11549,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11551,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11551,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11553,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11553,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11555,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11555,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11557,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11557,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11559,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11559,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11561,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11561,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11563,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11563,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11565,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11565,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11567,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11567,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11569,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11569,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11571,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11571,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11581,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11581,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11583,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11583,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11585,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11585,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11587,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11587,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11589,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11589,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11591,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11591,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11593,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11593,37): error TS1005: ';' expected.
-typescript_standalone.d.ts(11595,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11595,72): error TS1005: ';' expected.
-typescript_standalone.d.ts(11597,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11597,52): error TS1005: ';' expected.
-typescript_standalone.d.ts(11669,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11669,72): error TS1005: ';' expected.
-typescript_standalone.d.ts(11671,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11671,38): error TS1005: ';' expected.
-typescript_standalone.d.ts(11673,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11673,71): error TS1005: ';' expected.
-typescript_standalone.d.ts(11675,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11675,40): error TS1005: ';' expected.
-typescript_standalone.d.ts(11751,28): error TS1005: ';' expected.
-typescript_standalone.d.ts(11751,48): error TS1005: ';' expected.
-
-
-==== tests/cases/compiler/APISample_watcher.ts (0 errors) ====
-    /*
-     * Note: This test is a public API sample. The sample sources can be found
-             at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#incremental-build-support-using-the-language-services
-     *       Please log a "breaking change" issue for any API breaking change affecting this issue
-     */
-    
-    declare var process: any;
-    declare var console: any;
-    declare var fs: {
-        existsSync(path: string): boolean;
-        readdirSync(path: string): string[];
-        readFileSync(filename: string, encoding?: string): string;
-        writeFileSync(filename: string, data: any, options?: { encoding?: string; mode?: number; flag?: string; } | string): void;
-        watchFile(filename: string, options: { persistent?: boolean; interval?: number; }, listener: (curr: { mtime: Date }, prev: { mtime: Date }) => void): void;
-    };
-    declare var path: any;
-    
-    import * as ts from "typescript";
-    
-    function watch(rootFileNames: string[], options: ts.CompilerOptions) {
-        const files: ts.MapLike<{ version: number }> = {};
-    
-        // initialize the list of files
-        rootFileNames.forEach(fileName => {
-            files[fileName] = { version: 0 };
-        });
-    
-        // Create the language service host to allow the LS to communicate with the host
-        const servicesHost: ts.LanguageServiceHost = {
-            getScriptFileNames: () => rootFileNames,
-            getScriptVersion: (fileName) => files[fileName] && files[fileName].version.toString(),
-            getScriptSnapshot: (fileName) => {
-                if (!fs.existsSync(fileName)) {
-                    return undefined;
-                }
-    
-                return ts.ScriptSnapshot.fromString(fs.readFileSync(fileName).toString());
-            },
-            getCurrentDirectory: () => process.cwd(),
-            getCompilationSettings: () => options,
-            getDefaultLibFileName: (options) => ts.getDefaultLibFilePath(options),
-        };
-    
-        // Create the language service files
-        const services = ts.createLanguageService(servicesHost, ts.createDocumentRegistry())
-    
-        // Now let's watch the files
-        rootFileNames.forEach(fileName => {
-            // First time around, emit all files
-            emitFile(fileName);
-    
-            // Add a watch on the file to handle next change
-            fs.watchFile(fileName,
-                { persistent: true, interval: 250 },
-                (curr, prev) => {
-                    // Check timestamp
-                    if (+curr.mtime <= +prev.mtime) {
-                        return;
-                    }
-    
-                    // Update the version to signal a change in the file
-                    files[fileName].version++;
-    
-                    // write the changes to disk
-                    emitFile(fileName);
-                });
-        });
-    
-        function emitFile(fileName: string) {
-            let output = services.getEmitOutput(fileName);
-    
-            if (!output.emitSkipped) {
-                console.log(`Emitting ${fileName}`);
-            }
-            else {
-                console.log(`Emitting ${fileName} failed`);
-                logErrors(fileName);
-            }
-    
-            output.outputFiles.forEach(o => {
-                fs.writeFileSync(o.name, o.text, "utf8");
-            });
-        }
-    
-        function logErrors(fileName: string) {
-            let allDiagnostics = services.getCompilerOptionsDiagnostics()
-                .concat(services.getSyntacticDiagnostics(fileName))
-                .concat(services.getSemanticDiagnostics(fileName));
-    
-            allDiagnostics.forEach(diagnostic => {
-                let message = ts.flattenDiagnosticMessageText(diagnostic.messageText, "\n");
-                if (diagnostic.file) {
-                    let { line, character } = diagnostic.file.getLineAndCharacterOfPosition(diagnostic.start!);
-                    console.log(`  Error ${diagnostic.file.fileName} (${line + 1},${character + 1}): ${message}`);
-                }
-                else {
-                    console.log(`  Error: ${message}`);
-                }
-            });
-        }
-    }
-    
-    // Initialize files constituting the program as all .ts files in the current directory
-    const currentDirectoryFiles = fs.readdirSync(process.cwd()).
-        filter(fileName=> fileName.length >= 3 && fileName.substr(fileName.length - 3, 3) === ".ts");
-    
-    // Start the watcher
-    watch(currentDirectoryFiles, { module: ts.ModuleKind.CommonJS });
-    
\ No newline at end of file
diff --git a/tests/baselines/reference/APISample_watcher.js b/tests/baselines/reference/APISample_watcher.js
index f4d03f8f62fe3..e93856a31656b 100644
--- a/tests/baselines/reference/APISample_watcher.js
+++ b/tests/baselines/reference/APISample_watcher.js
@@ -1,7 +1,14 @@
+//// [tests/cases/compiler/APISample_watcher.ts] ////
+
+//// [index.d.ts]
+declare module "typescript" {
+    export = ts;
+}
+
 //// [APISample_watcher.ts]
 /*
  * Note: This test is a public API sample. The sample sources can be found
-         at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#incremental-build-support-using-the-language-services
+ *       at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#incremental-build-support-using-the-language-services
  *       Please log a "breaking change" issue for any API breaking change affecting this issue
  */
 
@@ -113,7 +120,7 @@ watch(currentDirectoryFiles, { module: ts.ModuleKind.CommonJS });
 "use strict";
 /*
  * Note: This test is a public API sample. The sample sources can be found
-         at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#incremental-build-support-using-the-language-services
+ *       at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#incremental-build-support-using-the-language-services
  *       Please log a "breaking change" issue for any API breaking change affecting this issue
  */
 exports.__esModule = true;
diff --git a/tests/baselines/reference/api/tsserverlibrary.d.ts b/tests/baselines/reference/api/tsserverlibrary.d.ts
index 8e1a4f1aae68b..75b03fe050903 100644
--- a/tests/baselines/reference/api/tsserverlibrary.d.ts
+++ b/tests/baselines/reference/api/tsserverlibrary.d.ts
@@ -1,63 +1,4 @@
-/*! *****************************************************************************
-Copyright (c) Microsoft Corporation. All rights reserved. 
-Licensed under the Apache License, Version 2.0 (the "License"); you may not use
-this file except in compliance with the License. You may obtain a copy of the
-License at http://www.apache.org/licenses/LICENSE-2.0  
- 
-THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
-WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
-MERCHANTABLITY OR NON-INFRINGEMENT. 
- 
-See the Apache Version 2.0 License for specific language governing permissions
-and limitations under the License.
-***************************************************************************** */
 
-declare namespace ts {
-    /** Gets a timestamp with (at least) ms resolution */
-    const timestamp: () => number;
-}
-/** Performance measurements for the compiler. */
-declare namespace ts.performance {
-    /**
-     * Marks a performance event.
-     *
-     * @param markName The name of the mark.
-     */
-    function mark(markName: string): void;
-    /**
-     * Adds a performance measurement with the specified name.
-     *
-     * @param measureName The name of the performance measurement.
-     * @param startMarkName The name of the starting mark. If not supplied, the point at which the
-     *      profiler was enabled is used.
-     * @param endMarkName The name of the ending mark. If not supplied, the current timestamp is
-     *      used.
-     */
-    function measure(measureName: string, startMarkName?: string, endMarkName?: string): void;
-    /**
-     * Gets the number of times a marker was encountered.
-     *
-     * @param markName The name of the mark.
-     */
-    function getCount(markName: string): number;
-    /**
-     * Gets the total duration of all measurements with the supplied name.
-     *
-     * @param measureName The name of the measure whose durations should be accumulated.
-     */
-    function getDuration(measureName: string): number;
-    /**
-     * Iterate over each measure, performing some action
-     *
-     * @param cb The action to perform for each measure
-     */
-    function forEachMeasure(cb: (measureName: string, duration: number) => void): void;
-    /** Enables (and resets) performance measurements for the compiler. */
-    function enable(): void;
-    /** Disables performance measurements for the compiler. */
-    function disable(): void;
-}
 declare namespace ts {
     const versionMajorMinor = "3.0";
     /** The version of the TypeScript compiler release */
@@ -75,15 +16,6 @@ declare namespace ts {
     interface SortedArray<T> extends Array<T> {
         " __sortedArrayBrand": any;
     }
-}
-declare namespace ts {
-    type EqualityComparer<T> = (a: T, b: T) => boolean;
-    type Comparer<T> = (a: T, b: T) => Comparison;
-    enum Comparison {
-        LessThan = -1,
-        EqualTo = 0,
-        GreaterThan = 1
-    }
     /** ES6 Map interface, only read methods included. */
     interface ReadonlyMap<T> {
         get(key: string): T | undefined;
@@ -114,6 +46,15 @@ declare namespace ts {
     interface Push<T> {
         push(...values: T[]): void;
     }
+    type EqualityComparer<T> = (a: T, b: T) => boolean;
+    type Comparer<T> = (a: T, b: T) => Comparison;
+    enum Comparison {
+        LessThan = -1,
+        EqualTo = 0,
+        GreaterThan = 1
+    }
+}
+declare namespace ts {
     /** Create a new map. If a template object is provided, the map will copy entries from it. */
     function createMap<T>(): Map<T>;
     function createMapFromEntries<T>(entries: [string, T][]): Map<T>;
@@ -581,7 +522,51 @@ declare namespace ts {
     function singleElementArray<T>(t: T | undefined): T[] | undefined;
     function enumerateInsertsAndDeletes<T, U>(newItems: ReadonlyArray<T>, oldItems: ReadonlyArray<U>, comparer: (a: T, b: U) => Comparison, inserted: (newItem: T) => void, deleted: (oldItem: U) => void, unchanged?: (oldItem: U, newItem: T) => void): void;
 }
-//# sourceMappingURL=core.d.ts.map
+declare namespace ts {
+    /** Gets a timestamp with (at least) ms resolution */
+    const timestamp: () => number;
+}
+/** Performance measurements for the compiler. */
+declare namespace ts.performance {
+    /**
+     * Marks a performance event.
+     *
+     * @param markName The name of the mark.
+     */
+    function mark(markName: string): void;
+    /**
+     * Adds a performance measurement with the specified name.
+     *
+     * @param measureName The name of the performance measurement.
+     * @param startMarkName The name of the starting mark. If not supplied, the point at which the
+     *      profiler was enabled is used.
+     * @param endMarkName The name of the ending mark. If not supplied, the current timestamp is
+     *      used.
+     */
+    function measure(measureName: string, startMarkName?: string, endMarkName?: string): void;
+    /**
+     * Gets the number of times a marker was encountered.
+     *
+     * @param markName The name of the mark.
+     */
+    function getCount(markName: string): number;
+    /**
+     * Gets the total duration of all measurements with the supplied name.
+     *
+     * @param measureName The name of the measure whose durations should be accumulated.
+     */
+    function getDuration(measureName: string): number;
+    /**
+     * Iterate over each measure, performing some action
+     *
+     * @param cb The action to perform for each measure
+     */
+    function forEachMeasure(cb: (measureName: string, duration: number) => void): void;
+    /** Enables (and resets) performance measurements for the compiler. */
+    function enable(): void;
+    /** Disables performance measurements for the compiler. */
+    function disable(): void;
+}
 declare namespace ts {
     type Path = string & {
         __pathBrand: any;
@@ -763,144 +748,146 @@ declare namespace ts {
         ArrayType = 167,
         TupleType = 168,
         OptionalType = 169,
-        UnionType = 170,
-        IntersectionType = 171,
-        ConditionalType = 172,
-        InferType = 173,
-        ParenthesizedType = 174,
-        ThisType = 175,
-        TypeOperator = 176,
-        IndexedAccessType = 177,
-        MappedType = 178,
-        LiteralType = 179,
-        ImportType = 180,
-        ObjectBindingPattern = 181,
-        ArrayBindingPattern = 182,
-        BindingElement = 183,
-        ArrayLiteralExpression = 184,
-        ObjectLiteralExpression = 185,
-        PropertyAccessExpression = 186,
-        ElementAccessExpression = 187,
-        CallExpression = 188,
-        NewExpression = 189,
-        TaggedTemplateExpression = 190,
-        TypeAssertionExpression = 191,
-        ParenthesizedExpression = 192,
-        FunctionExpression = 193,
-        ArrowFunction = 194,
-        DeleteExpression = 195,
-        TypeOfExpression = 196,
-        VoidExpression = 197,
-        AwaitExpression = 198,
-        PrefixUnaryExpression = 199,
-        PostfixUnaryExpression = 200,
-        BinaryExpression = 201,
-        ConditionalExpression = 202,
-        TemplateExpression = 203,
-        YieldExpression = 204,
-        SpreadElement = 205,
-        ClassExpression = 206,
-        OmittedExpression = 207,
-        ExpressionWithTypeArguments = 208,
-        AsExpression = 209,
-        NonNullExpression = 210,
-        MetaProperty = 211,
-        SyntheticExpression = 212,
-        TemplateSpan = 213,
-        SemicolonClassElement = 214,
-        Block = 215,
-        VariableStatement = 216,
-        EmptyStatement = 217,
-        ExpressionStatement = 218,
-        IfStatement = 219,
-        DoStatement = 220,
-        WhileStatement = 221,
-        ForStatement = 222,
-        ForInStatement = 223,
-        ForOfStatement = 224,
-        ContinueStatement = 225,
-        BreakStatement = 226,
-        ReturnStatement = 227,
-        WithStatement = 228,
-        SwitchStatement = 229,
-        LabeledStatement = 230,
-        ThrowStatement = 231,
-        TryStatement = 232,
-        DebuggerStatement = 233,
-        VariableDeclaration = 234,
-        VariableDeclarationList = 235,
-        FunctionDeclaration = 236,
-        ClassDeclaration = 237,
-        InterfaceDeclaration = 238,
-        TypeAliasDeclaration = 239,
-        EnumDeclaration = 240,
-        ModuleDeclaration = 241,
-        ModuleBlock = 242,
-        CaseBlock = 243,
-        NamespaceExportDeclaration = 244,
-        ImportEqualsDeclaration = 245,
-        ImportDeclaration = 246,
-        ImportClause = 247,
-        NamespaceImport = 248,
-        NamedImports = 249,
-        ImportSpecifier = 250,
-        ExportAssignment = 251,
-        ExportDeclaration = 252,
-        NamedExports = 253,
-        ExportSpecifier = 254,
-        MissingDeclaration = 255,
-        ExternalModuleReference = 256,
-        JsxElement = 257,
-        JsxSelfClosingElement = 258,
-        JsxOpeningElement = 259,
-        JsxClosingElement = 260,
-        JsxFragment = 261,
-        JsxOpeningFragment = 262,
-        JsxClosingFragment = 263,
-        JsxAttribute = 264,
-        JsxAttributes = 265,
-        JsxSpreadAttribute = 266,
-        JsxExpression = 267,
-        CaseClause = 268,
-        DefaultClause = 269,
-        HeritageClause = 270,
-        CatchClause = 271,
-        PropertyAssignment = 272,
-        ShorthandPropertyAssignment = 273,
-        SpreadAssignment = 274,
-        EnumMember = 275,
-        SourceFile = 276,
-        Bundle = 277,
-        UnparsedSource = 278,
-        InputFiles = 279,
-        JSDocTypeExpression = 280,
-        JSDocAllType = 281,
-        JSDocUnknownType = 282,
-        JSDocNullableType = 283,
-        JSDocNonNullableType = 284,
-        JSDocOptionalType = 285,
-        JSDocFunctionType = 286,
-        JSDocVariadicType = 287,
-        JSDocComment = 288,
-        JSDocTypeLiteral = 289,
-        JSDocSignature = 290,
-        JSDocTag = 291,
-        JSDocAugmentsTag = 292,
-        JSDocClassTag = 293,
-        JSDocCallbackTag = 294,
-        JSDocParameterTag = 295,
-        JSDocReturnTag = 296,
-        JSDocTypeTag = 297,
-        JSDocTemplateTag = 298,
-        JSDocTypedefTag = 299,
-        JSDocPropertyTag = 300,
-        SyntaxList = 301,
-        NotEmittedStatement = 302,
-        PartiallyEmittedExpression = 303,
-        CommaListExpression = 304,
-        MergeDeclarationMarker = 305,
-        EndOfDeclarationMarker = 306,
-        Count = 307,
+        RestType = 170,
+        UnionType = 171,
+        IntersectionType = 172,
+        ConditionalType = 173,
+        InferType = 174,
+        ParenthesizedType = 175,
+        ThisType = 176,
+        TypeOperator = 177,
+        IndexedAccessType = 178,
+        MappedType = 179,
+        LiteralType = 180,
+        ImportType = 181,
+        ObjectBindingPattern = 182,
+        ArrayBindingPattern = 183,
+        BindingElement = 184,
+        ArrayLiteralExpression = 185,
+        ObjectLiteralExpression = 186,
+        PropertyAccessExpression = 187,
+        ElementAccessExpression = 188,
+        CallExpression = 189,
+        NewExpression = 190,
+        TaggedTemplateExpression = 191,
+        TypeAssertionExpression = 192,
+        ParenthesizedExpression = 193,
+        FunctionExpression = 194,
+        ArrowFunction = 195,
+        DeleteExpression = 196,
+        TypeOfExpression = 197,
+        VoidExpression = 198,
+        AwaitExpression = 199,
+        PrefixUnaryExpression = 200,
+        PostfixUnaryExpression = 201,
+        BinaryExpression = 202,
+        ConditionalExpression = 203,
+        TemplateExpression = 204,
+        YieldExpression = 205,
+        SpreadElement = 206,
+        ClassExpression = 207,
+        OmittedExpression = 208,
+        ExpressionWithTypeArguments = 209,
+        AsExpression = 210,
+        NonNullExpression = 211,
+        MetaProperty = 212,
+        SyntheticExpression = 213,
+        TemplateSpan = 214,
+        SemicolonClassElement = 215,
+        Block = 216,
+        VariableStatement = 217,
+        EmptyStatement = 218,
+        ExpressionStatement = 219,
+        IfStatement = 220,
+        DoStatement = 221,
+        WhileStatement = 222,
+        ForStatement = 223,
+        ForInStatement = 224,
+        ForOfStatement = 225,
+        ContinueStatement = 226,
+        BreakStatement = 227,
+        ReturnStatement = 228,
+        WithStatement = 229,
+        SwitchStatement = 230,
+        LabeledStatement = 231,
+        ThrowStatement = 232,
+        TryStatement = 233,
+        DebuggerStatement = 234,
+        VariableDeclaration = 235,
+        VariableDeclarationList = 236,
+        FunctionDeclaration = 237,
+        ClassDeclaration = 238,
+        InterfaceDeclaration = 239,
+        TypeAliasDeclaration = 240,
+        EnumDeclaration = 241,
+        ModuleDeclaration = 242,
+        ModuleBlock = 243,
+        CaseBlock = 244,
+        NamespaceExportDeclaration = 245,
+        ImportEqualsDeclaration = 246,
+        ImportDeclaration = 247,
+        ImportClause = 248,
+        NamespaceImport = 249,
+        NamedImports = 250,
+        ImportSpecifier = 251,
+        ExportAssignment = 252,
+        ExportDeclaration = 253,
+        NamedExports = 254,
+        ExportSpecifier = 255,
+        MissingDeclaration = 256,
+        ExternalModuleReference = 257,
+        JsxElement = 258,
+        JsxSelfClosingElement = 259,
+        JsxOpeningElement = 260,
+        JsxClosingElement = 261,
+        JsxFragment = 262,
+        JsxOpeningFragment = 263,
+        JsxClosingFragment = 264,
+        JsxAttribute = 265,
+        JsxAttributes = 266,
+        JsxSpreadAttribute = 267,
+        JsxExpression = 268,
+        CaseClause = 269,
+        DefaultClause = 270,
+        HeritageClause = 271,
+        CatchClause = 272,
+        PropertyAssignment = 273,
+        ShorthandPropertyAssignment = 274,
+        SpreadAssignment = 275,
+        EnumMember = 276,
+        SourceFile = 277,
+        Bundle = 278,
+        UnparsedSource = 279,
+        InputFiles = 280,
+        JSDocTypeExpression = 281,
+        JSDocAllType = 282,
+        JSDocUnknownType = 283,
+        JSDocNullableType = 284,
+        JSDocNonNullableType = 285,
+        JSDocOptionalType = 286,
+        JSDocFunctionType = 287,
+        JSDocVariadicType = 288,
+        JSDocComment = 289,
+        JSDocTypeLiteral = 290,
+        JSDocSignature = 291,
+        JSDocTag = 292,
+        JSDocAugmentsTag = 293,
+        JSDocClassTag = 294,
+        JSDocCallbackTag = 295,
+        JSDocParameterTag = 296,
+        JSDocReturnTag = 297,
+        JSDocThisTag = 298,
+        JSDocTypeTag = 299,
+        JSDocTemplateTag = 300,
+        JSDocTypedefTag = 301,
+        JSDocPropertyTag = 302,
+        SyntaxList = 303,
+        NotEmittedStatement = 304,
+        PartiallyEmittedExpression = 305,
+        CommaListExpression = 306,
+        MergeDeclarationMarker = 307,
+        EndOfDeclarationMarker = 308,
+        Count = 309,
         FirstAssignment = 58,
         LastAssignment = 70,
         FirstCompoundAssignment = 59,
@@ -912,7 +899,7 @@ declare namespace ts {
         FirstFutureReservedWord = 108,
         LastFutureReservedWord = 116,
         FirstTypeNode = 161,
-        LastTypeNode = 180,
+        LastTypeNode = 181,
         FirstPunctuation = 17,
         LastPunctuation = 70,
         FirstToken = 0,
@@ -926,10 +913,10 @@ declare namespace ts {
         FirstBinaryOperator = 27,
         LastBinaryOperator = 70,
         FirstNode = 146,
-        FirstJSDocNode = 280,
-        LastJSDocNode = 300,
-        FirstJSDocTagNode = 291,
-        LastJSDocTagNode = 300,
+        FirstJSDocNode = 281,
+        LastJSDocNode = 302,
+        FirstJSDocTagNode = 292,
+        LastJSDocTagNode = 302,
         FirstContextualKeyword = 117,
         LastContextualKeyword = 145
     }
@@ -1356,6 +1343,10 @@ declare namespace ts {
         kind: SyntaxKind.OptionalType;
         type: TypeNode;
     }
+    interface RestTypeNode extends TypeNode {
+        kind: SyntaxKind.RestType;
+        type: TypeNode;
+    }
     type UnionOrIntersectionTypeNode = UnionTypeNode | IntersectionTypeNode;
     interface UnionTypeNode extends TypeNode {
         kind: SyntaxKind.UnionType;
@@ -2173,6 +2164,10 @@ declare namespace ts {
     interface JSDocClassTag extends JSDocTag {
         kind: SyntaxKind.JSDocClassTag;
     }
+    interface JSDocThisTag extends JSDocTag {
+        kind: SyntaxKind.JSDocThisTag;
+        typeExpression?: JSDocTypeExpression;
+    }
     interface JSDocTemplateTag extends JSDocTag {
         kind: SyntaxKind.JSDocTemplateTag;
         typeParameters: NodeArray<TypeParameterDeclaration>;
@@ -2385,13 +2380,16 @@ declare namespace ts {
     interface InputFiles extends Node {
         kind: SyntaxKind.InputFiles;
         javascriptText: string;
+        javascriptMapPath?: string;
         javascriptMapText?: string;
         declarationText: string;
+        declarationMapPath?: string;
         declarationMapText?: string;
     }
     interface UnparsedSource extends Node {
         kind: SyntaxKind.UnparsedSource;
         text: string;
+        sourceMapPath?: string;
         sourceMapText?: string;
     }
     interface JsonSourceFile extends SourceFile {
@@ -2530,7 +2528,7 @@ declare namespace ts {
         sourceMapFile: string;
         sourceMapSourceRoot: string;
         sourceMapSources: string[];
-        sourceMapSourcesContent?: string[];
+        sourceMapSourcesContent?: (string | null)[];
         inputSourceFileNames: string[];
         sourceMapNames?: string[];
         sourceMapMappings: string;
@@ -3350,6 +3348,7 @@ declare namespace ts {
     }
     interface TupleType extends GenericType {
         minLength: number;
+        hasRestElement: boolean;
         associatedNames?: __String[];
     }
     interface UnionOrIntersectionType extends Type {
@@ -3583,16 +3582,19 @@ declare namespace ts {
         code: number;
         next?: DiagnosticMessageChain;
     }
-    interface Diagnostic {
-        file: SourceFile | undefined;
-        start: number | undefined;
-        length: number | undefined;
-        messageText: string | DiagnosticMessageChain;
+    interface Diagnostic extends DiagnosticRelatedInformation {
         category: DiagnosticCategory;
         /** May store more in future. For now, this will simply be `true` to indicate when a diagnostic is an unused-identifier diagnostic. */
         reportsUnnecessary?: {};
         code: number;
         source?: string;
+        relatedInformation?: DiagnosticRelatedInformation[];
+    }
+    interface DiagnosticRelatedInformation {
+        file: SourceFile | undefined;
+        start: number | undefined;
+        length: number | undefined;
+        messageText: string | DiagnosticMessageChain;
     }
     interface DiagnosticWithLocation extends Diagnostic {
         file: SourceFile;
@@ -4482,6 +4484,7 @@ declare namespace ts {
         useCaseSensitiveFileNames?(): boolean;
         fileExists?(path: string): boolean;
         readFile?(path: string): string | undefined;
+        getSourceFiles?(): ReadonlyArray<SourceFile>;
     }
     /** @deprecated See comment on SymbolWriter */
     interface SymbolTracker {
@@ -5767,7 +5770,7 @@ declare namespace ts {
         Try_npm_install_types_Slash_0_if_it_exists_or_add_a_new_declaration_d_ts_file_containing_declare_module_0: DiagnosticMessage;
         Dynamic_import_s_specifier_must_be_of_type_string_but_here_has_type_0: DiagnosticMessage;
         Enables_emit_interoperability_between_CommonJS_and_ES_Modules_via_creation_of_namespace_objects_for_all_imports_Implies_allowSyntheticDefaultImports: DiagnosticMessage;
-        A_namespace_style_import_cannot_be_called_or_constructed_and_will_cause_a_failure_at_runtime: DiagnosticMessage;
+        Type_originates_at_this_import_A_namespace_style_import_cannot_be_called_or_constructed_and_will_cause_a_failure_at_runtime_Consider_using_a_default_import_or_import_require_here_instead: DiagnosticMessage;
         Mapped_object_type_implicitly_has_an_any_template_type: DiagnosticMessage;
         You_cannot_rename_this_element: DiagnosticMessage;
         You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library: DiagnosticMessage;
@@ -5987,14 +5990,11 @@ declare namespace ts {
 }
 /** Non-internal stuff goes here */
 declare namespace ts {
-    const emptyArray: never[];
-    function closeFileWatcher(watcher: FileWatcher): void;
     function isExternalModuleNameRelative(moduleName: string): boolean;
     function sortAndDeduplicateDiagnostics<T extends Diagnostic>(diagnostics: ReadonlyArray<T>): T[];
-    function toPath(fileName: string, basePath: string | undefined, getCanonicalFileName: (path: string) => string): Path;
-    function hasEntries(map: ReadonlyUnderscoreEscapedMap<any> | undefined): map is ReadonlyUnderscoreEscapedMap<any>;
 }
 declare namespace ts {
+    const emptyArray: never[];
     const resolvingEmptyArray: never[];
     const emptyMap: ReadonlyMap<never>;
     const emptyUnderscoreEscapedMap: ReadonlyUnderscoreEscapedMap<never>;
@@ -6002,7 +6002,9 @@ declare namespace ts {
     function getDeclarationOfKind<T extends Declaration>(symbol: Symbol, kind: T["kind"]): T | undefined;
     /** Create a new escaped identifier map. */
     function createUnderscoreEscapedMap<T>(): UnderscoreEscapedMap<T>;
+    function hasEntries(map: ReadonlyUnderscoreEscapedMap<any> | undefined): map is ReadonlyUnderscoreEscapedMap<any>;
     function createSymbolTable(symbols?: ReadonlyArray<Symbol>): SymbolTable;
+    function toPath(fileName: string, basePath: string | undefined, getCanonicalFileName: (path: string) => string): Path;
     function changesAffectModuleResolution(oldOptions: CompilerOptions, newOptions: CompilerOptions): boolean;
     /**
      * Iterates through the parent chain of a node and performs the callback on each parent until the callback
@@ -6131,7 +6133,7 @@ declare namespace ts {
     function createDiagnosticForNode(node: Node, message: DiagnosticMessage, arg0?: string | number, arg1?: string | number, arg2?: string | number, arg3?: string | number): DiagnosticWithLocation;
     function createDiagnosticForNodeArray(sourceFile: SourceFile, nodes: NodeArray<Node>, message: DiagnosticMessage, arg0?: string | number, arg1?: string | number, arg2?: string | number, arg3?: string | number): Diagnostic;
     function createDiagnosticForNodeInSourceFile(sourceFile: SourceFile, node: Node, message: DiagnosticMessage, arg0?: string | number, arg1?: string | number, arg2?: string | number, arg3?: string | number): DiagnosticWithLocation;
-    function createDiagnosticForNodeFromMessageChain(node: Node, messageChain: DiagnosticMessageChain): DiagnosticWithLocation;
+    function createDiagnosticForNodeFromMessageChain(node: Node, messageChain: DiagnosticMessageChain, relatedInformation?: DiagnosticRelatedInformation[]): DiagnosticWithLocation;
     function getSpanOfTokenAtPosition(sourceFile: SourceFile, pos: number): TextSpan;
     function getErrorSpanForNode(sourceFile: SourceFile, node: Node): TextSpan;
     function isExternalOrCommonJsModule(file: SourceFile): boolean;
@@ -6236,6 +6238,8 @@ declare namespace ts {
     function getDeclarationOfJSInitializer(node: Node): Node | undefined;
     /** Get the initializer, taking into account defaulted Javascript initializers */
     function getEffectiveInitializer(node: HasExpressionInitializer): Expression | undefined;
+    /** Get the declaration initializer when it is container-like (See getJavascriptInitializer). */
+    function getDeclaredJavascriptInitializer(node: HasExpressionInitializer): Expression | undefined;
     /**
      * Get the assignment 'initializer' -- the righthand side-- when the initializer is container-like (See getJavascriptInitializer).
      * We treat the right hand side of assignments with container-like initalizers as declarations.
@@ -6372,7 +6376,7 @@ declare namespace ts {
     function getExpressionAssociativity(expression: Expression): Associativity;
     function getOperatorAssociativity(kind: SyntaxKind, operator: SyntaxKind, hasArguments?: boolean): Associativity;
     function getExpressionPrecedence(expression: Expression): number;
-    function getOperator(expression: Expression): SyntaxKind.Unknown | SyntaxKind.EndOfFileToken | SyntaxKind.SingleLineCommentTrivia | SyntaxKind.MultiLineCommentTrivia | SyntaxKind.NewLineTrivia | SyntaxKind.WhitespaceTrivia | SyntaxKind.ShebangTrivia | SyntaxKind.ConflictMarkerTrivia | SyntaxKind.NumericLiteral | SyntaxKind.StringLiteral | SyntaxKind.JsxText | SyntaxKind.JsxTextAllWhiteSpaces | SyntaxKind.RegularExpressionLiteral | SyntaxKind.NoSubstitutionTemplateLiteral | SyntaxKind.TemplateHead | SyntaxKind.TemplateMiddle | SyntaxKind.TemplateTail | SyntaxKind.OpenBraceToken | SyntaxKind.CloseBraceToken | SyntaxKind.OpenParenToken | SyntaxKind.CloseParenToken | SyntaxKind.OpenBracketToken | SyntaxKind.CloseBracketToken | SyntaxKind.DotToken | SyntaxKind.DotDotDotToken | SyntaxKind.SemicolonToken | SyntaxKind.CommaToken | SyntaxKind.LessThanToken | SyntaxKind.LessThanSlashToken | SyntaxKind.GreaterThanToken | SyntaxKind.LessThanEqualsToken | SyntaxKind.GreaterThanEqualsToken | SyntaxKind.EqualsEqualsToken | SyntaxKind.ExclamationEqualsToken | SyntaxKind.EqualsEqualsEqualsToken | SyntaxKind.ExclamationEqualsEqualsToken | SyntaxKind.EqualsGreaterThanToken | SyntaxKind.PlusToken | SyntaxKind.MinusToken | SyntaxKind.AsteriskToken | SyntaxKind.AsteriskAsteriskToken | SyntaxKind.SlashToken | SyntaxKind.PercentToken | SyntaxKind.PlusPlusToken | SyntaxKind.MinusMinusToken | SyntaxKind.LessThanLessThanToken | SyntaxKind.GreaterThanGreaterThanToken | SyntaxKind.GreaterThanGreaterThanGreaterThanToken | SyntaxKind.AmpersandToken | SyntaxKind.BarToken | SyntaxKind.CaretToken | SyntaxKind.ExclamationToken | SyntaxKind.TildeToken | SyntaxKind.AmpersandAmpersandToken | SyntaxKind.BarBarToken | SyntaxKind.QuestionToken | SyntaxKind.ColonToken | SyntaxKind.AtToken | SyntaxKind.EqualsToken | SyntaxKind.PlusEqualsToken | SyntaxKind.MinusEqualsToken | SyntaxKind.AsteriskEqualsToken | SyntaxKind.AsteriskAsteriskEqualsToken | SyntaxKind.SlashEqualsToken | SyntaxKind.PercentEqualsToken | SyntaxKind.LessThanLessThanEqualsToken | SyntaxKind.GreaterThanGreaterThanEqualsToken | SyntaxKind.GreaterThanGreaterThanGreaterThanEqualsToken | SyntaxKind.AmpersandEqualsToken | SyntaxKind.BarEqualsToken | SyntaxKind.CaretEqualsToken | SyntaxKind.Identifier | SyntaxKind.BreakKeyword | SyntaxKind.CaseKeyword | SyntaxKind.CatchKeyword | SyntaxKind.ClassKeyword | SyntaxKind.ConstKeyword | SyntaxKind.ContinueKeyword | SyntaxKind.DebuggerKeyword | SyntaxKind.DefaultKeyword | SyntaxKind.DeleteKeyword | SyntaxKind.DoKeyword | SyntaxKind.ElseKeyword | SyntaxKind.EnumKeyword | SyntaxKind.ExportKeyword | SyntaxKind.ExtendsKeyword | SyntaxKind.FalseKeyword | SyntaxKind.FinallyKeyword | SyntaxKind.ForKeyword | SyntaxKind.FunctionKeyword | SyntaxKind.IfKeyword | SyntaxKind.ImportKeyword | SyntaxKind.InKeyword | SyntaxKind.InstanceOfKeyword | SyntaxKind.NewKeyword | SyntaxKind.NullKeyword | SyntaxKind.ReturnKeyword | SyntaxKind.SuperKeyword | SyntaxKind.SwitchKeyword | SyntaxKind.ThisKeyword | SyntaxKind.ThrowKeyword | SyntaxKind.TrueKeyword | SyntaxKind.TryKeyword | SyntaxKind.TypeOfKeyword | SyntaxKind.VarKeyword | SyntaxKind.VoidKeyword | SyntaxKind.WhileKeyword | SyntaxKind.WithKeyword | SyntaxKind.ImplementsKeyword | SyntaxKind.InterfaceKeyword | SyntaxKind.LetKeyword | SyntaxKind.PackageKeyword | SyntaxKind.PrivateKeyword | SyntaxKind.ProtectedKeyword | SyntaxKind.PublicKeyword | SyntaxKind.StaticKeyword | SyntaxKind.YieldKeyword | SyntaxKind.AbstractKeyword | SyntaxKind.AsKeyword | SyntaxKind.AnyKeyword | SyntaxKind.AsyncKeyword | SyntaxKind.AwaitKeyword | SyntaxKind.BooleanKeyword | SyntaxKind.ConstructorKeyword | SyntaxKind.DeclareKeyword | SyntaxKind.GetKeyword | SyntaxKind.InferKeyword | SyntaxKind.IsKeyword | SyntaxKind.KeyOfKeyword | SyntaxKind.ModuleKeyword | SyntaxKind.NamespaceKeyword | SyntaxKind.NeverKeyword | SyntaxKind.ReadonlyKeyword | SyntaxKind.RequireKeyword | SyntaxKind.NumberKeyword | SyntaxKind.ObjectKeyword | SyntaxKind.SetKeyword | SyntaxKind.StringKeyword | SyntaxKind.SymbolKeyword | SyntaxKind.TypeKeyword | SyntaxKind.UndefinedKeyword | SyntaxKind.UniqueKeyword | SyntaxKind.UnknownKeyword | SyntaxKind.FromKeyword | SyntaxKind.GlobalKeyword | SyntaxKind.OfKeyword | SyntaxKind.QualifiedName | SyntaxKind.ComputedPropertyName | SyntaxKind.TypeParameter | SyntaxKind.Parameter | SyntaxKind.Decorator | SyntaxKind.PropertySignature | SyntaxKind.PropertyDeclaration | SyntaxKind.MethodSignature | SyntaxKind.MethodDeclaration | SyntaxKind.Constructor | SyntaxKind.GetAccessor | SyntaxKind.SetAccessor | SyntaxKind.CallSignature | SyntaxKind.ConstructSignature | SyntaxKind.IndexSignature | SyntaxKind.TypePredicate | SyntaxKind.TypeReference | SyntaxKind.FunctionType | SyntaxKind.ConstructorType | SyntaxKind.TypeQuery | SyntaxKind.TypeLiteral | SyntaxKind.ArrayType | SyntaxKind.TupleType | SyntaxKind.OptionalType | SyntaxKind.UnionType | SyntaxKind.IntersectionType | SyntaxKind.ConditionalType | SyntaxKind.InferType | SyntaxKind.ParenthesizedType | SyntaxKind.ThisType | SyntaxKind.TypeOperator | SyntaxKind.IndexedAccessType | SyntaxKind.MappedType | SyntaxKind.LiteralType | SyntaxKind.ImportType | SyntaxKind.ObjectBindingPattern | SyntaxKind.ArrayBindingPattern | SyntaxKind.BindingElement | SyntaxKind.ArrayLiteralExpression | SyntaxKind.ObjectLiteralExpression | SyntaxKind.PropertyAccessExpression | SyntaxKind.ElementAccessExpression | SyntaxKind.CallExpression | SyntaxKind.NewExpression | SyntaxKind.TaggedTemplateExpression | SyntaxKind.TypeAssertionExpression | SyntaxKind.ParenthesizedExpression | SyntaxKind.FunctionExpression | SyntaxKind.ArrowFunction | SyntaxKind.DeleteExpression | SyntaxKind.TypeOfExpression | SyntaxKind.VoidExpression | SyntaxKind.AwaitExpression | SyntaxKind.ConditionalExpression | SyntaxKind.TemplateExpression | SyntaxKind.YieldExpression | SyntaxKind.SpreadElement | SyntaxKind.ClassExpression | SyntaxKind.OmittedExpression | SyntaxKind.ExpressionWithTypeArguments | SyntaxKind.AsExpression | SyntaxKind.NonNullExpression | SyntaxKind.MetaProperty | SyntaxKind.SyntheticExpression | SyntaxKind.TemplateSpan | SyntaxKind.SemicolonClassElement | SyntaxKind.Block | SyntaxKind.VariableStatement | SyntaxKind.EmptyStatement | SyntaxKind.ExpressionStatement | SyntaxKind.IfStatement | SyntaxKind.DoStatement | SyntaxKind.WhileStatement | SyntaxKind.ForStatement | SyntaxKind.ForInStatement | SyntaxKind.ForOfStatement | SyntaxKind.ContinueStatement | SyntaxKind.BreakStatement | SyntaxKind.ReturnStatement | SyntaxKind.WithStatement | SyntaxKind.SwitchStatement | SyntaxKind.LabeledStatement | SyntaxKind.ThrowStatement | SyntaxKind.TryStatement | SyntaxKind.DebuggerStatement | SyntaxKind.VariableDeclaration | SyntaxKind.VariableDeclarationList | SyntaxKind.FunctionDeclaration | SyntaxKind.ClassDeclaration | SyntaxKind.InterfaceDeclaration | SyntaxKind.TypeAliasDeclaration | SyntaxKind.EnumDeclaration | SyntaxKind.ModuleDeclaration | SyntaxKind.ModuleBlock | SyntaxKind.CaseBlock | SyntaxKind.NamespaceExportDeclaration | SyntaxKind.ImportEqualsDeclaration | SyntaxKind.ImportDeclaration | SyntaxKind.ImportClause | SyntaxKind.NamespaceImport | SyntaxKind.NamedImports | SyntaxKind.ImportSpecifier | SyntaxKind.ExportAssignment | SyntaxKind.ExportDeclaration | SyntaxKind.NamedExports | SyntaxKind.ExportSpecifier | SyntaxKind.MissingDeclaration | SyntaxKind.ExternalModuleReference | SyntaxKind.JsxElement | SyntaxKind.JsxSelfClosingElement | SyntaxKind.JsxOpeningElement | SyntaxKind.JsxClosingElement | SyntaxKind.JsxFragment | SyntaxKind.JsxOpeningFragment | SyntaxKind.JsxClosingFragment | SyntaxKind.JsxAttribute | SyntaxKind.JsxAttributes | SyntaxKind.JsxSpreadAttribute | SyntaxKind.JsxExpression | SyntaxKind.CaseClause | SyntaxKind.DefaultClause | SyntaxKind.HeritageClause | SyntaxKind.CatchClause | SyntaxKind.PropertyAssignment | SyntaxKind.ShorthandPropertyAssignment | SyntaxKind.SpreadAssignment | SyntaxKind.EnumMember | SyntaxKind.SourceFile | SyntaxKind.Bundle | SyntaxKind.UnparsedSource | SyntaxKind.InputFiles | SyntaxKind.JSDocTypeExpression | SyntaxKind.JSDocAllType | SyntaxKind.JSDocUnknownType | SyntaxKind.JSDocNullableType | SyntaxKind.JSDocNonNullableType | SyntaxKind.JSDocOptionalType | SyntaxKind.JSDocFunctionType | SyntaxKind.JSDocVariadicType | SyntaxKind.JSDocComment | SyntaxKind.JSDocTypeLiteral | SyntaxKind.JSDocSignature | SyntaxKind.JSDocTag | SyntaxKind.JSDocAugmentsTag | SyntaxKind.JSDocClassTag | SyntaxKind.JSDocCallbackTag | SyntaxKind.JSDocParameterTag | SyntaxKind.JSDocReturnTag | SyntaxKind.JSDocTypeTag | SyntaxKind.JSDocTemplateTag | SyntaxKind.JSDocTypedefTag | SyntaxKind.JSDocPropertyTag | SyntaxKind.SyntaxList | SyntaxKind.NotEmittedStatement | SyntaxKind.PartiallyEmittedExpression | SyntaxKind.CommaListExpression | SyntaxKind.MergeDeclarationMarker | SyntaxKind.EndOfDeclarationMarker | SyntaxKind.Count;
+    function getOperator(expression: Expression): SyntaxKind;
     function getOperatorPrecedence(nodeKind: SyntaxKind, operatorKind: SyntaxKind, hasArguments?: boolean): number;
     function getBinaryOperatorPrecedence(kind: SyntaxKind): number;
     function createDiagnosticCollection(): DiagnosticCollection;
@@ -6561,6 +6565,7 @@ declare namespace ts {
     function isDeclarationNameOfEnumOrNamespace(node: Identifier): boolean;
     function getInitializedVariables(node: VariableDeclarationList): ReadonlyArray<VariableDeclaration>;
     function isWatchSet(options: CompilerOptions): boolean | undefined;
+    function closeFileWatcher(watcher: FileWatcher): void;
     function getCheckFlags(symbol: Symbol): CheckFlags;
     function getDeclarationModifierFlagsFromSymbol(s: Symbol): ModifierFlags;
     function skipAlias(symbol: Symbol, checker: TypeChecker): Symbol;
@@ -6725,6 +6730,8 @@ declare namespace ts {
     function getJSDocAugmentsTag(node: Node): JSDocAugmentsTag | undefined;
     /** Gets the JSDoc class tag for the node if present */
     function getJSDocClassTag(node: Node): JSDocClassTag | undefined;
+    /** Gets the JSDoc this tag for the node if present */
+    function getJSDocThisTag(node: Node): JSDocThisTag | undefined;
     /** Gets the JSDoc return tag for the node if present */
     function getJSDocReturnTag(node: Node): JSDocReturnTag | undefined;
     /** Gets the JSDoc template tag for the node if present */
@@ -6911,6 +6918,7 @@ declare namespace ts {
     function isJSDoc(node: Node): node is JSDoc;
     function isJSDocAugmentsTag(node: Node): node is JSDocAugmentsTag;
     function isJSDocClassTag(node: Node): node is JSDocClassTag;
+    function isJSDocThisTag(node: Node): node is JSDocThisTag;
     function isJSDocParameterTag(node: Node): node is JSDocParameterTag;
     function isJSDocReturnTag(node: Node): node is JSDocReturnTag;
     function isJSDocTypeTag(node: Node): node is JSDocTypeTag;
@@ -7047,6 +7055,8 @@ declare namespace ts {
     function isTypeReferenceType(node: Node): node is TypeReferenceType;
     function guessIndentation(lines: string[]): number | undefined;
     function isStringLiteralLike(node: Node): node is StringLiteralLike;
+}
+declare namespace ts {
     /** @internal */
     function isNamedImportsOrExports(node: Node): node is NamedImportsOrExports;
     interface ObjectAllocator {
@@ -7184,6 +7194,9 @@ declare namespace ts {
      * segments (at indices > 0).
      */
     function getPathFromPathComponents(pathComponents: ReadonlyArray<string>): string;
+}
+declare namespace ts {
+    function getPathComponentsRelativeTo(from: string, to: string, stringEqualityComparer: (a: string, b: string) => boolean, getCanonicalFileName: GetCanonicalFileName): string[];
     function getRelativePathFromFile(from: string, to: string, getCanonicalFileName: GetCanonicalFileName): string;
     /**
      * Gets a relative path that can be used to traverse between `from` and `to`.
@@ -7639,7 +7652,6 @@ declare namespace ts {
      */
     function loadModuleFromGlobalCache(moduleName: string, projectName: string | undefined, compilerOptions: CompilerOptions, host: ModuleResolutionHost, globalCache: string): ResolvedModuleWithFailedLookupLocations;
 }
-//# sourceMappingURL=parser.d.ts.map
 declare namespace ts {
     enum ModuleInstanceState {
         NonInstantiated = 0,
@@ -7663,7 +7675,7 @@ declare namespace ts {
      *       For performance reasons, `computeTransformFlagsForNode` uses local constant values rather
      *       than calling this function.
      */
-    function getTransformFlagsSubtreeExclusions(kind: SyntaxKind): TransformFlags.OuterExpressionExcludes | TransformFlags.PropertyAccessExcludes | TransformFlags.NodeExcludes | TransformFlags.ArrowFunctionExcludes | TransformFlags.FunctionExcludes | TransformFlags.ConstructorExcludes | TransformFlags.ClassExcludes | TransformFlags.ModuleExcludes | TransformFlags.TypeExcludes | TransformFlags.ObjectLiteralExcludes | TransformFlags.ArrayLiteralOrCallOrNewExcludes | TransformFlags.VariableDeclarationListExcludes | TransformFlags.CatchClauseExcludes;
+    function getTransformFlagsSubtreeExclusions(kind: SyntaxKind): TransformFlags;
 }
 /** @internal */
 declare namespace ts {
@@ -7769,11 +7781,13 @@ declare namespace ts {
     function updateTupleTypeNode(node: TupleTypeNode, elementTypes: ReadonlyArray<TypeNode>): TupleTypeNode;
     function createOptionalTypeNode(type: TypeNode): OptionalTypeNode;
     function updateOptionalTypeNode(node: OptionalTypeNode, type: TypeNode): OptionalTypeNode;
+    function createRestTypeNode(type: TypeNode): RestTypeNode;
+    function updateRestTypeNode(node: RestTypeNode, type: TypeNode): RestTypeNode;
     function createUnionTypeNode(types: ReadonlyArray<TypeNode>): UnionTypeNode;
     function updateUnionTypeNode(node: UnionTypeNode, types: NodeArray<TypeNode>): UnionTypeNode;
     function createIntersectionTypeNode(types: ReadonlyArray<TypeNode>): IntersectionTypeNode;
     function updateIntersectionTypeNode(node: IntersectionTypeNode, types: NodeArray<TypeNode>): IntersectionTypeNode;
-    function createUnionOrIntersectionTypeNode(kind: SyntaxKind.UnionType | SyntaxKind.IntersectionType, types: ReadonlyArray<TypeNode>): UnionTypeNode | IntersectionTypeNode;
+    function createUnionOrIntersectionTypeNode(kind: SyntaxKind.UnionType | SyntaxKind.IntersectionType, types: ReadonlyArray<TypeNode>): UnionOrIntersectionTypeNode;
     function createConditionalTypeNode(checkType: TypeNode, extendsType: TypeNode, trueType: TypeNode, falseType: TypeNode): ConditionalTypeNode;
     function updateConditionalTypeNode(node: ConditionalTypeNode, checkType: TypeNode, extendsType: TypeNode, trueType: TypeNode, falseType: TypeNode): ConditionalTypeNode;
     function createInferTypeNode(typeParameter: TypeParameterDeclaration): InferTypeNode;
@@ -8018,8 +8032,10 @@ declare namespace ts {
     function createCommaList(elements: ReadonlyArray<Expression>): CommaListExpression;
     function updateCommaList(node: CommaListExpression, elements: ReadonlyArray<Expression>): CommaListExpression;
     function createBundle(sourceFiles: ReadonlyArray<SourceFile>, prepends?: ReadonlyArray<UnparsedSource | InputFiles>): Bundle;
-    function createUnparsedSourceFile(text: string, map?: string): UnparsedSource;
-    function createInputFiles(javascript: string, declaration: string, javascriptMapText?: string, declarationMapText?: string): InputFiles;
+    function createUnparsedSourceFile(text: string): UnparsedSource;
+    function createUnparsedSourceFile(text: string, mapPath: string | undefined, map: string | undefined): UnparsedSource;
+    function createInputFiles(javascript: string, declaration: string): InputFiles;
+    function createInputFiles(javascript: string, declaration: string, javascriptMapPath: string | undefined, javascriptMapText: string | undefined, declarationMapPath: string | undefined, declarationMapText: string | undefined): InputFiles;
     function updateBundle(node: Bundle, sourceFiles: ReadonlyArray<SourceFile>, prepends?: ReadonlyArray<UnparsedSource>): Bundle;
     function createImmediatelyInvokedFunctionExpression(statements: ReadonlyArray<Statement>): CallExpression;
     function createImmediatelyInvokedFunctionExpression(statements: ReadonlyArray<Statement>, param: ParameterDeclaration, paramValue: Expression): CallExpression;
@@ -8508,6 +8524,62 @@ declare namespace ts {
         function enableDebugInfo(): void;
     }
 }
+declare namespace ts {
+    interface SourceFileLikeCache {
+        get(path: Path): SourceFileLike | undefined;
+    }
+    function createSourceFileLikeCache(host: {
+        readFile?: (path: string) => string | undefined;
+        fileExists?: (path: string) => boolean;
+    }): SourceFileLikeCache;
+}
+declare namespace ts.sourcemaps {
+    interface SourceMapData {
+        version?: number;
+        file?: string;
+        sourceRoot?: string;
+        sources: string[];
+        sourcesContent?: (string | null)[];
+        names?: string[];
+        mappings: string;
+    }
+    interface SourceMappableLocation {
+        fileName: string;
+        position: number;
+    }
+    interface SourceMapper {
+        getOriginalPosition(input: SourceMappableLocation): SourceMappableLocation;
+        getGeneratedPosition(input: SourceMappableLocation): SourceMappableLocation;
+    }
+    const identitySourceMapper: {
+        getOriginalPosition: typeof identity;
+        getGeneratedPosition: typeof identity;
+    };
+    interface SourceMapDecodeHost {
+        readFile(path: string): string | undefined;
+        fileExists(path: string): boolean;
+        getCanonicalFileName(path: string): string;
+        log(text: string): void;
+    }
+    function decode(host: SourceMapDecodeHost, mapPath: string, map: SourceMapData, program?: Program, fallbackCache?: SourceFileLikeCache): SourceMapper;
+    interface MappingsDecoder extends Iterator<SourceMapSpan> {
+        readonly decodingIndex: number;
+        readonly error: string | undefined;
+        readonly lastSpan: SourceMapSpan;
+    }
+    function decodeMappings(map: SourceMapData): MappingsDecoder;
+    function calculateDecodedMappings<T>(map: SourceMapData, processPosition: (position: RawSourceMapPosition) => T, host?: {
+        log?(s: string): void;
+    }): T[];
+    interface RawSourceMapPosition {
+        emittedLine: number;
+        emittedColumn: number;
+        sourceLine: number;
+        sourceColumn: number;
+        sourceIndex: number;
+        nameIndex?: number;
+    }
+}
 declare namespace ts {
     function getOriginalNodeId(node: Node): number;
     interface ExternalModuleInfo {
@@ -9188,7 +9260,7 @@ declare namespace ts.moduleSpecifiers {
         importModuleSpecifierPreference?: "relative" | "non-relative";
     }
     function getModuleSpecifier(compilerOptions: CompilerOptions, fromSourceFile: SourceFile, fromSourceFileName: string, toFileName: string, host: ModuleSpecifierResolutionHost, preferences?: ModuleSpecifierPreferences): string;
-    function getModuleSpecifiers(moduleSymbol: Symbol, program: Program, importingSourceFile: SourceFile, host: ModuleSpecifierResolutionHost, preferences: ModuleSpecifierPreferences): ReadonlyArray<ReadonlyArray<string>>;
+    function getModuleSpecifiers(moduleSymbol: Symbol, compilerOptions: CompilerOptions, importingSourceFile: SourceFile, host: ModuleSpecifierResolutionHost, files: ReadonlyArray<SourceFile>, preferences: ModuleSpecifierPreferences): ReadonlyArray<ReadonlyArray<string>>;
 }
 declare namespace ts {
     /**
@@ -9513,16 +9585,16 @@ declare namespace ts {
         getKeys: () => ReadonlyArray<ResolvedConfigFileName>;
     };
     function createBuildContext(options: BuildOptions): BuildContext;
-    function performBuild(args: string[], compilerHost: CompilerHost, buildHost: BuildHost, system?: System): void;
+    function performBuild(args: string[], compilerHost: CompilerHost, buildHost: BuildHost, system?: System): number | undefined;
     /**
      * A SolutionBuilder has an immutable set of rootNames that are the "entry point" projects, but
      * can dynamically add/remove other projects based on changes on the rootNames' references
      */
     function createSolutionBuilder(compilerHost: CompilerHost, buildHost: BuildHost, rootNames: ReadonlyArray<string>, defaultOptions: BuildOptions, system?: System): {
-        buildAllProjects: () => void;
+        buildAllProjects: () => ExitStatus;
         getUpToDateStatus: (project: ParsedCommandLine | undefined) => UpToDateStatus;
         getUpToDateStatusOfFile: (configFileName: ResolvedConfigFileName) => UpToDateStatus;
-        cleanAllProjects: () => void;
+        cleanAllProjects: () => ExitStatus.Success | ExitStatus.DiagnosticsPresent_OutputsSkipped;
         resetBuildContext: (opts?: BuildOptions) => void;
         getBuildGraph: (configFileNames: ReadonlyArray<string>) => DependencyGraph | undefined;
         invalidateProject: (configFileName: string) => void;
@@ -9533,49 +9605,229 @@ declare namespace ts {
     };
 }
 //# sourceMappingURL=compiler.d.ts.map
-declare namespace ts {
-    interface Node {
-        getSourceFile(): SourceFile;
-        getChildCount(sourceFile?: SourceFile): number;
-        getChildAt(index: number, sourceFile?: SourceFile): Node;
-        getChildren(sourceFile?: SourceFile): Node[];
-        getChildren(sourceFile?: SourceFileLike): Node[];
-        getStart(sourceFile?: SourceFile, includeJsDocComment?: boolean): number;
-        getStart(sourceFile?: SourceFileLike, includeJsDocComment?: boolean): number;
-        getFullStart(): number;
-        getEnd(): number;
-        getWidth(sourceFile?: SourceFileLike): number;
-        getFullWidth(): number;
-        getLeadingTriviaWidth(sourceFile?: SourceFile): number;
-        getFullText(sourceFile?: SourceFile): string;
-        getText(sourceFile?: SourceFile): string;
-        getFirstToken(sourceFile?: SourceFile): Node | undefined;
-        getLastToken(sourceFile?: SourceFile): Node | undefined;
-        forEachChild<T>(cbNode: (node: Node) => T | undefined, cbNodeArray?: (nodes: NodeArray<Node>) => T | undefined): T | undefined;
+declare namespace ts.server {
+    const ActionSet: ActionSet;
+    const ActionInvalidate: ActionInvalidate;
+    const ActionPackageInstalled: ActionPackageInstalled;
+    const EventTypesRegistry: EventTypesRegistry;
+    const EventBeginInstallTypes: EventBeginInstallTypes;
+    const EventEndInstallTypes: EventEndInstallTypes;
+    const EventInitializationFailed: EventInitializationFailed;
+    namespace Arguments {
+        const GlobalCacheLocation = "--globalTypingsCacheLocation";
+        const LogFile = "--logFile";
+        const EnableTelemetry = "--enableTelemetry";
+        const TypingSafeListLocation = "--typingSafeListLocation";
+        const TypesMapLocation = "--typesMapLocation";
+        /**
+         * This argument specifies the location of the NPM executable.
+         * typingsInstaller will run the command with `${npmLocation} install ...`.
+         */
+        const NpmLocation = "--npmLocation";
     }
-    interface Identifier {
-        readonly text: string;
+    function hasArgument(argumentName: string): boolean;
+    function findArgument(argumentName: string): string | undefined;
+    function nowString(): string;
+}
+declare namespace ts.server {
+    type ActionSet = "action::set";
+    type ActionInvalidate = "action::invalidate";
+    type ActionPackageInstalled = "action::packageInstalled";
+    type EventTypesRegistry = "event::typesRegistry";
+    type EventBeginInstallTypes = "event::beginInstallTypes";
+    type EventEndInstallTypes = "event::endInstallTypes";
+    type EventInitializationFailed = "event::initializationFailed";
+    interface SortedReadonlyArray<T> extends ReadonlyArray<T> {
+        " __sortedArrayBrand": any;
     }
-    interface Symbol {
-        readonly name: string;
-        getFlags(): SymbolFlags;
-        getEscapedName(): __String;
-        getName(): string;
-        getDeclarations(): Declaration[] | undefined;
-        getDocumentationComment(typeChecker: TypeChecker | undefined): SymbolDisplayPart[];
-        getJsDocTags(): JSDocTagInfo[];
+    interface TypingInstallerResponse {
+        readonly kind: ActionSet | ActionInvalidate | EventTypesRegistry | ActionPackageInstalled | EventBeginInstallTypes | EventEndInstallTypes | EventInitializationFailed;
     }
-    interface Type {
-        getFlags(): TypeFlags;
-        getSymbol(): Symbol | undefined;
-        getProperties(): Symbol[];
-        getProperty(propertyName: string): Symbol | undefined;
-        getApparentProperties(): Symbol[];
-        getCallSignatures(): Signature[];
-        getConstructSignatures(): Signature[];
-        getStringIndexType(): Type | undefined;
-        getNumberIndexType(): Type | undefined;
-        getBaseTypes(): BaseType[] | undefined;
+    interface TypingInstallerRequestWithProjectName {
+        readonly projectName: string;
+    }
+    type TypingInstallerRequestUnion = DiscoverTypings | CloseProject | TypesRegistryRequest | InstallPackageRequest;
+    interface DiscoverTypings extends TypingInstallerRequestWithProjectName {
+        readonly fileNames: string[];
+        readonly projectRootPath: Path;
+        readonly compilerOptions: CompilerOptions;
+        readonly typeAcquisition: TypeAcquisition;
+        readonly unresolvedImports: SortedReadonlyArray<string>;
+        readonly cachePath?: string;
+        readonly kind: "discover";
+    }
+    interface CloseProject extends TypingInstallerRequestWithProjectName {
+        readonly kind: "closeProject";
+    }
+    interface TypesRegistryRequest {
+        readonly kind: "typesRegistry";
+    }
+    interface InstallPackageRequest extends TypingInstallerRequestWithProjectName {
+        readonly kind: "installPackage";
+        readonly fileName: Path;
+        readonly packageName: string;
+        readonly projectRootPath: Path;
+    }
+    interface TypesRegistryResponse extends TypingInstallerResponse {
+        readonly kind: EventTypesRegistry;
+        readonly typesRegistry: MapLike<MapLike<string>>;
+    }
+    interface PackageInstalledResponse extends ProjectResponse {
+        readonly kind: ActionPackageInstalled;
+        readonly success: boolean;
+        readonly message: string;
+    }
+    interface InitializationFailedResponse extends TypingInstallerResponse {
+        readonly kind: EventInitializationFailed;
+        readonly message: string;
+    }
+    interface ProjectResponse extends TypingInstallerResponse {
+        readonly projectName: string;
+    }
+    interface InvalidateCachedTypings extends ProjectResponse {
+        readonly kind: ActionInvalidate;
+    }
+    interface InstallTypes extends ProjectResponse {
+        readonly kind: EventBeginInstallTypes | EventEndInstallTypes;
+        readonly eventId: number;
+        readonly typingsInstallerVersion: string;
+        readonly packagesToInstall: ReadonlyArray<string>;
+    }
+    interface BeginInstallTypes extends InstallTypes {
+        readonly kind: EventBeginInstallTypes;
+    }
+    interface EndInstallTypes extends InstallTypes {
+        readonly kind: EventEndInstallTypes;
+        readonly installSuccess: boolean;
+    }
+    interface InstallTypingHost extends JsTyping.TypingResolutionHost {
+        useCaseSensitiveFileNames: boolean;
+        writeFile(path: string, content: string): void;
+        createDirectory(path: string): void;
+        watchFile?(path: string, callback: FileWatcherCallback, pollingInterval?: number): FileWatcher;
+        watchDirectory?(path: string, callback: DirectoryWatcherCallback, recursive?: boolean): FileWatcher;
+    }
+    interface SetTypings extends ProjectResponse {
+        readonly typeAcquisition: TypeAcquisition;
+        readonly compilerOptions: CompilerOptions;
+        readonly typings: string[];
+        readonly unresolvedImports: SortedReadonlyArray<string>;
+        readonly kind: ActionSet;
+    }
+    type TypingInstallerResponseUnion = SetTypings | InvalidateCachedTypings | TypesRegistryResponse | PackageInstalledResponse | InstallTypes | InitializationFailedResponse;
+}
+declare namespace ts.JsTyping {
+    interface TypingResolutionHost {
+        directoryExists(path: string): boolean;
+        fileExists(fileName: string): boolean;
+        readFile(path: string, encoding?: string): string | undefined;
+        readDirectory(rootDir: string, extensions: ReadonlyArray<string>, excludes: ReadonlyArray<string> | undefined, includes: ReadonlyArray<string> | undefined, depth?: number): string[];
+    }
+    interface CachedTyping {
+        typingLocation: string;
+        version: Semver;
+    }
+    function isTypingUpToDate(cachedTyping: CachedTyping, availableTypingVersions: MapLike<string>): boolean;
+    const nodeCoreModuleList: ReadonlyArray<string>;
+    const nodeCoreModules: Map<true>;
+    /**
+     * A map of loose file names to library names that we are confident require typings
+     */
+    type SafeList = ReadonlyMap<string>;
+    function loadSafeList(host: TypingResolutionHost, safeListPath: Path): SafeList;
+    function loadTypesMap(host: TypingResolutionHost, typesMapPath: Path): SafeList | undefined;
+    /**
+     * @param host is the object providing I/O related operations.
+     * @param fileNames are the file names that belong to the same project
+     * @param projectRootPath is the path to the project root directory
+     * @param safeListPath is the path used to retrieve the safe list
+     * @param packageNameToTypingLocation is the map of package names to their cached typing locations and installed versions
+     * @param typeAcquisition is used to customize the typing acquisition process
+     * @param compilerOptions are used as a source for typing inference
+     */
+    function discoverTypings(host: TypingResolutionHost, log: ((message: string) => void) | undefined, fileNames: string[], projectRootPath: Path, safeList: SafeList, packageNameToTypingLocation: ReadonlyMap<CachedTyping>, typeAcquisition: TypeAcquisition, unresolvedImports: ReadonlyArray<string>, typesRegistry: ReadonlyMap<MapLike<string>>): {
+        cachedTypingPaths: string[];
+        newTypingNames: string[];
+        filesToWatch: string[];
+    };
+    enum PackageNameValidationResult {
+        Ok = 0,
+        ScopedPackagesNotSupported = 1,
+        EmptyName = 2,
+        NameTooLong = 3,
+        NameStartsWithDot = 4,
+        NameStartsWithUnderscore = 5,
+        NameContainsNonURISafeCharacters = 6
+    }
+    /**
+     * Validates package name using rules defined at https://docs.npmjs.com/files/package.json
+     */
+    function validatePackageName(packageName: string): PackageNameValidationResult;
+    function renderPackageNameValidationFailure(result: PackageNameValidationResult, typing: string): string;
+}
+declare namespace ts {
+    class Semver {
+        readonly major: number;
+        readonly minor: number;
+        readonly patch: number;
+        /**
+         * If true, this is `major.minor.0-next.patch`.
+         * If false, this is `major.minor.patch`.
+         */
+        readonly isPrerelease: boolean;
+        static parse(semver: string): Semver;
+        static fromRaw({ major, minor, patch, isPrerelease }: Semver): Semver;
+        private static tryParse;
+        private constructor();
+        readonly versionString: string;
+        equals(sem: Semver): boolean;
+        greaterThan(sem: Semver): boolean;
+    }
+}
+//# sourceMappingURL=jsTyping.d.ts.map
+declare namespace ts {
+    interface Node {
+        getSourceFile(): SourceFile;
+        getChildCount(sourceFile?: SourceFile): number;
+        getChildAt(index: number, sourceFile?: SourceFile): Node;
+        getChildren(sourceFile?: SourceFile): Node[];
+        getChildren(sourceFile?: SourceFileLike): Node[];
+        getStart(sourceFile?: SourceFile, includeJsDocComment?: boolean): number;
+        getStart(sourceFile?: SourceFileLike, includeJsDocComment?: boolean): number;
+        getFullStart(): number;
+        getEnd(): number;
+        getWidth(sourceFile?: SourceFileLike): number;
+        getFullWidth(): number;
+        getLeadingTriviaWidth(sourceFile?: SourceFile): number;
+        getFullText(sourceFile?: SourceFile): string;
+        getText(sourceFile?: SourceFile): string;
+        getFirstToken(sourceFile?: SourceFile): Node | undefined;
+        getLastToken(sourceFile?: SourceFile): Node | undefined;
+        forEachChild<T>(cbNode: (node: Node) => T | undefined, cbNodeArray?: (nodes: NodeArray<Node>) => T | undefined): T | undefined;
+    }
+    interface Identifier {
+        readonly text: string;
+    }
+    interface Symbol {
+        readonly name: string;
+        getFlags(): SymbolFlags;
+        getEscapedName(): __String;
+        getName(): string;
+        getDeclarations(): Declaration[] | undefined;
+        getDocumentationComment(typeChecker: TypeChecker | undefined): SymbolDisplayPart[];
+        getJsDocTags(): JSDocTagInfo[];
+    }
+    interface Type {
+        getFlags(): TypeFlags;
+        getSymbol(): Symbol | undefined;
+        getProperties(): Symbol[];
+        getProperty(propertyName: string): Symbol | undefined;
+        getApparentProperties(): Symbol[];
+        getCallSignatures(): Signature[];
+        getConstructSignatures(): Signature[];
+        getStringIndexType(): Type | undefined;
+        getNumberIndexType(): Type | undefined;
+        getBaseTypes(): BaseType[] | undefined;
         getNonNullableType(): Type;
         getConstraint(): Type | undefined;
         getDefault(): Type | undefined;
@@ -10560,6 +10812,7 @@ declare namespace ts {
         some(pred: (node: Node) => boolean): boolean;
     }
     function getParentNodeInSpan(node: Node | undefined, file: SourceFile, span: TextSpan): Node | undefined;
+    function insertImport(changes: textChanges.ChangeTracker, sourceFile: SourceFile, importDecl: Statement): void;
 }
 declare namespace ts {
     function isFirstDeclarationOfSymbolParameter(symbol: Symbol): boolean;
@@ -11492,36 +11745,6 @@ declare namespace ts.refactor {
 }
 declare namespace ts.refactor.addOrRemoveBracesToArrowFunction {
 }
-declare namespace ts.sourcemaps {
-    interface SourceMapData {
-        version?: number;
-        file?: string;
-        sourceRoot?: string;
-        sources: string[];
-        sourcesContent?: string[];
-        names?: string[];
-        mappings: string;
-    }
-    interface SourceMappableLocation {
-        fileName: string;
-        position: number;
-    }
-    interface SourceMapper {
-        getOriginalPosition(input: SourceMappableLocation): SourceMappableLocation;
-        getGeneratedPosition(input: SourceMappableLocation): SourceMappableLocation;
-    }
-    const identitySourceMapper: {
-        getOriginalPosition: typeof identity;
-        getGeneratedPosition: typeof identity;
-    };
-    interface SourceMapDecodeHost {
-        readFile(path: string): string | undefined;
-        fileExists(path: string): boolean;
-        getCanonicalFileName(path: string): string;
-        log(text: string): void;
-    }
-    function decode(host: SourceMapDecodeHost, mapPath: string, map: SourceMapData, program?: Program, fallbackCache?: SourceFileLikeCache): SourceMapper;
-}
 declare namespace ts {
     /** The version of the language service API */
     const servicesVersion = "0.8";
@@ -11545,13 +11768,6 @@ declare namespace ts {
         isCancellationRequested(): boolean;
         throwIfCancellationRequested(): void;
     }
-    interface SourceFileLikeCache {
-        get(path: Path): SourceFileLike | undefined;
-    }
-    function createSourceFileLikeCache(host: {
-        readFile?: (path: string) => string | undefined;
-        fileExists?: (path: string) => boolean;
-    }): SourceFileLikeCache;
     function createLanguageService(host: LanguageServiceHost, documentRegistry?: DocumentRegistry, syntaxOnly?: boolean): LanguageService;
     /** Names in the name table are escaped, so an identifier `__foo` will have a name table entry `___foo`. */
     function getNameTable(sourceFile: SourceFile): UnderscoreEscapedMap<number>;
@@ -11855,186 +12071,6 @@ declare namespace TypeScript.Services {
 }
 declare const toolsVersion = "3.0";
 //# sourceMappingURL=services.d.ts.map
-declare namespace ts.server {
-    const ActionSet: ActionSet;
-    const ActionInvalidate: ActionInvalidate;
-    const ActionPackageInstalled: ActionPackageInstalled;
-    const EventTypesRegistry: EventTypesRegistry;
-    const EventBeginInstallTypes: EventBeginInstallTypes;
-    const EventEndInstallTypes: EventEndInstallTypes;
-    const EventInitializationFailed: EventInitializationFailed;
-    namespace Arguments {
-        const GlobalCacheLocation = "--globalTypingsCacheLocation";
-        const LogFile = "--logFile";
-        const EnableTelemetry = "--enableTelemetry";
-        const TypingSafeListLocation = "--typingSafeListLocation";
-        const TypesMapLocation = "--typesMapLocation";
-        /**
-         * This argument specifies the location of the NPM executable.
-         * typingsInstaller will run the command with `${npmLocation} install ...`.
-         */
-        const NpmLocation = "--npmLocation";
-    }
-    function hasArgument(argumentName: string): boolean;
-    function findArgument(argumentName: string): string | undefined;
-    function nowString(): string;
-}
-declare namespace ts.server {
-    type ActionSet = "action::set";
-    type ActionInvalidate = "action::invalidate";
-    type ActionPackageInstalled = "action::packageInstalled";
-    type EventTypesRegistry = "event::typesRegistry";
-    type EventBeginInstallTypes = "event::beginInstallTypes";
-    type EventEndInstallTypes = "event::endInstallTypes";
-    type EventInitializationFailed = "event::initializationFailed";
-    interface SortedReadonlyArray<T> extends ReadonlyArray<T> {
-        " __sortedArrayBrand": any;
-    }
-    interface TypingInstallerResponse {
-        readonly kind: ActionSet | ActionInvalidate | EventTypesRegistry | ActionPackageInstalled | EventBeginInstallTypes | EventEndInstallTypes | EventInitializationFailed;
-    }
-    interface TypingInstallerRequestWithProjectName {
-        readonly projectName: string;
-    }
-    type TypingInstallerRequestUnion = DiscoverTypings | CloseProject | TypesRegistryRequest | InstallPackageRequest;
-    interface DiscoverTypings extends TypingInstallerRequestWithProjectName {
-        readonly fileNames: string[];
-        readonly projectRootPath: Path;
-        readonly compilerOptions: CompilerOptions;
-        readonly typeAcquisition: TypeAcquisition;
-        readonly unresolvedImports: SortedReadonlyArray<string>;
-        readonly cachePath?: string;
-        readonly kind: "discover";
-    }
-    interface CloseProject extends TypingInstallerRequestWithProjectName {
-        readonly kind: "closeProject";
-    }
-    interface TypesRegistryRequest {
-        readonly kind: "typesRegistry";
-    }
-    interface InstallPackageRequest extends TypingInstallerRequestWithProjectName {
-        readonly kind: "installPackage";
-        readonly fileName: Path;
-        readonly packageName: string;
-        readonly projectRootPath: Path;
-    }
-    interface TypesRegistryResponse extends TypingInstallerResponse {
-        readonly kind: EventTypesRegistry;
-        readonly typesRegistry: MapLike<MapLike<string>>;
-    }
-    interface PackageInstalledResponse extends ProjectResponse {
-        readonly kind: ActionPackageInstalled;
-        readonly success: boolean;
-        readonly message: string;
-    }
-    interface InitializationFailedResponse extends TypingInstallerResponse {
-        readonly kind: EventInitializationFailed;
-        readonly message: string;
-    }
-    interface ProjectResponse extends TypingInstallerResponse {
-        readonly projectName: string;
-    }
-    interface InvalidateCachedTypings extends ProjectResponse {
-        readonly kind: ActionInvalidate;
-    }
-    interface InstallTypes extends ProjectResponse {
-        readonly kind: EventBeginInstallTypes | EventEndInstallTypes;
-        readonly eventId: number;
-        readonly typingsInstallerVersion: string;
-        readonly packagesToInstall: ReadonlyArray<string>;
-    }
-    interface BeginInstallTypes extends InstallTypes {
-        readonly kind: EventBeginInstallTypes;
-    }
-    interface EndInstallTypes extends InstallTypes {
-        readonly kind: EventEndInstallTypes;
-        readonly installSuccess: boolean;
-    }
-    interface InstallTypingHost extends JsTyping.TypingResolutionHost {
-        useCaseSensitiveFileNames: boolean;
-        writeFile(path: string, content: string): void;
-        createDirectory(path: string): void;
-        watchFile?(path: string, callback: FileWatcherCallback, pollingInterval?: number): FileWatcher;
-        watchDirectory?(path: string, callback: DirectoryWatcherCallback, recursive?: boolean): FileWatcher;
-    }
-    interface SetTypings extends ProjectResponse {
-        readonly typeAcquisition: TypeAcquisition;
-        readonly compilerOptions: CompilerOptions;
-        readonly typings: string[];
-        readonly unresolvedImports: SortedReadonlyArray<string>;
-        readonly kind: ActionSet;
-    }
-    type TypingInstallerResponseUnion = SetTypings | InvalidateCachedTypings | TypesRegistryResponse | PackageInstalledResponse | InstallTypes | InitializationFailedResponse;
-}
-declare namespace ts.JsTyping {
-    interface TypingResolutionHost {
-        directoryExists(path: string): boolean;
-        fileExists(fileName: string): boolean;
-        readFile(path: string, encoding?: string): string | undefined;
-        readDirectory(rootDir: string, extensions: ReadonlyArray<string>, excludes: ReadonlyArray<string> | undefined, includes: ReadonlyArray<string> | undefined, depth?: number): string[];
-    }
-    interface CachedTyping {
-        typingLocation: string;
-        version: Semver;
-    }
-    function isTypingUpToDate(cachedTyping: CachedTyping, availableTypingVersions: MapLike<string>): boolean;
-    const nodeCoreModuleList: ReadonlyArray<string>;
-    const nodeCoreModules: Map<true>;
-    /**
-     * A map of loose file names to library names that we are confident require typings
-     */
-    type SafeList = ReadonlyMap<string>;
-    function loadSafeList(host: TypingResolutionHost, safeListPath: Path): SafeList;
-    function loadTypesMap(host: TypingResolutionHost, typesMapPath: Path): SafeList | undefined;
-    /**
-     * @param host is the object providing I/O related operations.
-     * @param fileNames are the file names that belong to the same project
-     * @param projectRootPath is the path to the project root directory
-     * @param safeListPath is the path used to retrieve the safe list
-     * @param packageNameToTypingLocation is the map of package names to their cached typing locations and installed versions
-     * @param typeAcquisition is used to customize the typing acquisition process
-     * @param compilerOptions are used as a source for typing inference
-     */
-    function discoverTypings(host: TypingResolutionHost, log: ((message: string) => void) | undefined, fileNames: string[], projectRootPath: Path, safeList: SafeList, packageNameToTypingLocation: ReadonlyMap<CachedTyping>, typeAcquisition: TypeAcquisition, unresolvedImports: ReadonlyArray<string>, typesRegistry: ReadonlyMap<MapLike<string>>): {
-        cachedTypingPaths: string[];
-        newTypingNames: string[];
-        filesToWatch: string[];
-    };
-    enum PackageNameValidationResult {
-        Ok = 0,
-        ScopedPackagesNotSupported = 1,
-        EmptyName = 2,
-        NameTooLong = 3,
-        NameStartsWithDot = 4,
-        NameStartsWithUnderscore = 5,
-        NameContainsNonURISafeCharacters = 6
-    }
-    /**
-     * Validates package name using rules defined at https://docs.npmjs.com/files/package.json
-     */
-    function validatePackageName(packageName: string): PackageNameValidationResult;
-    function renderPackageNameValidationFailure(result: PackageNameValidationResult, typing: string): string;
-}
-declare namespace ts {
-    class Semver {
-        readonly major: number;
-        readonly minor: number;
-        readonly patch: number;
-        /**
-         * If true, this is `major.minor.0-next.patch`.
-         * If false, this is `major.minor.patch`.
-         */
-        readonly isPrerelease: boolean;
-        static parse(semver: string): Semver;
-        static fromRaw({ major, minor, patch, isPrerelease }: Semver): Semver;
-        private static tryParse;
-        private constructor();
-        readonly versionString: string;
-        equals(sem: Semver): boolean;
-        greaterThan(sem: Semver): boolean;
-    }
-}
-//# sourceMappingURL=jsTyping.d.ts.map
 declare namespace ts.server {
     interface CompressedData {
         length: number;
@@ -12362,6 +12398,7 @@ declare namespace ts.server.protocol {
         category: string;
         code: number;
         reportsUnnecessary?: {};
+        relatedInformation?: DiagnosticRelatedInformation[];
     }
     interface ProjectInfoResponse extends Response {
         body?: ProjectInfo;
@@ -12952,12 +12989,17 @@ declare namespace ts.server.protocol {
         text: string;
         category: string;
         reportsUnnecessary?: {};
+        relatedInformation?: DiagnosticRelatedInformation[];
         code?: number;
         source?: string;
     }
     interface DiagnosticWithFileName extends Diagnostic {
         fileName: string;
     }
+    interface DiagnosticRelatedInformation {
+        message: string;
+        span?: FileSpan;
+    }
     interface DiagnosticEventBody {
         file: string;
         diagnostics: Diagnostic[];
@@ -14143,6 +14185,5 @@ declare namespace ts.server {
     }
 }
 //# sourceMappingURL=server.d.ts.map
-//# sourceMappingURL=tsserverlibrary.d.ts.map
 export = ts;
 export as namespace ts;
\ No newline at end of file
diff --git a/tests/baselines/reference/api/typescript.d.ts b/tests/baselines/reference/api/typescript.d.ts
index ce0091395a024..d3d1d836cc32f 100644
--- a/tests/baselines/reference/api/typescript.d.ts
+++ b/tests/baselines/reference/api/typescript.d.ts
@@ -1,63 +1,3 @@
-/*! *****************************************************************************
-Copyright (c) Microsoft Corporation. All rights reserved. 
-Licensed under the Apache License, Version 2.0 (the "License"); you may not use
-this file except in compliance with the License. You may obtain a copy of the
-License at http://www.apache.org/licenses/LICENSE-2.0  
- 
-THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
-WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
-MERCHANTABLITY OR NON-INFRINGEMENT. 
- 
-See the Apache Version 2.0 License for specific language governing permissions
-and limitations under the License.
-***************************************************************************** */
-
-declare namespace ts {
-    /** Gets a timestamp with (at least) ms resolution */
-    const timestamp: () => number;
-}
-/** Performance measurements for the compiler. */
-declare namespace ts.performance {
-    /**
-     * Marks a performance event.
-     *
-     * @param markName The name of the mark.
-     */
-    function mark(markName: string): void;
-    /**
-     * Adds a performance measurement with the specified name.
-     *
-     * @param measureName The name of the performance measurement.
-     * @param startMarkName The name of the starting mark. If not supplied, the point at which the
-     *      profiler was enabled is used.
-     * @param endMarkName The name of the ending mark. If not supplied, the current timestamp is
-     *      used.
-     */
-    function measure(measureName: string, startMarkName?: string, endMarkName?: string): void;
-    /**
-     * Gets the number of times a marker was encountered.
-     *
-     * @param markName The name of the mark.
-     */
-    function getCount(markName: string): number;
-    /**
-     * Gets the total duration of all measurements with the supplied name.
-     *
-     * @param measureName The name of the measure whose durations should be accumulated.
-     */
-    function getDuration(measureName: string): number;
-    /**
-     * Iterate over each measure, performing some action
-     *
-     * @param cb The action to perform for each measure
-     */
-    function forEachMeasure(cb: (measureName: string, duration: number) => void): void;
-    /** Enables (and resets) performance measurements for the compiler. */
-    function enable(): void;
-    /** Disables performance measurements for the compiler. */
-    function disable(): void;
-}
 declare namespace ts {
     const versionMajorMinor = "3.0";
     /** The version of the TypeScript compiler release */
@@ -75,15 +15,6 @@ declare namespace ts {
     interface SortedArray<T> extends Array<T> {
         " __sortedArrayBrand": any;
     }
-}
-declare namespace ts {
-    type EqualityComparer<T> = (a: T, b: T) => boolean;
-    type Comparer<T> = (a: T, b: T) => Comparison;
-    enum Comparison {
-        LessThan = -1,
-        EqualTo = 0,
-        GreaterThan = 1
-    }
     /** ES6 Map interface, only read methods included. */
     interface ReadonlyMap<T> {
         get(key: string): T | undefined;
@@ -114,474 +45,7 @@ declare namespace ts {
     interface Push<T> {
         push(...values: T[]): void;
     }
-    /** Create a new map. If a template object is provided, the map will copy entries from it. */
-    function createMap<T>(): Map<T>;
-    function createMapFromEntries<T>(entries: [string, T][]): Map<T>;
-    function createMapFromTemplate<T>(template: MapLike<T>): Map<T>;
-    const MapCtr: new <T>() => Map<T>;
-    function length(array: ReadonlyArray<any> | undefined): number;
-    /**
-     * Iterates through 'array' by index and performs the callback on each element of array until the callback
-     * returns a truthy value, then returns that value.
-     * If no such value is found, the callback is applied to each element of array and undefined is returned.
-     */
-    function forEach<T, U>(array: ReadonlyArray<T> | undefined, callback: (element: T, index: number) => U | undefined): U | undefined;
-    /** Like `forEach`, but suitable for use with numbers and strings (which may be falsy). */
-    function firstDefined<T, U>(array: ReadonlyArray<T> | undefined, callback: (element: T, index: number) => U | undefined): U | undefined;
-    function firstDefinedIterator<T, U>(iter: Iterator<T>, callback: (element: T) => U | undefined): U | undefined;
-    function zipWith<T, U, V>(arrayA: ReadonlyArray<T>, arrayB: ReadonlyArray<U>, callback: (a: T, b: U, index: number) => V): V[];
-    function zipToIterator<T, U>(arrayA: ReadonlyArray<T>, arrayB: ReadonlyArray<U>): Iterator<[T, U]>;
-    function zipToMap<T>(keys: ReadonlyArray<string>, values: ReadonlyArray<T>): Map<T>;
-    /**
-     * Iterates through `array` by index and performs the callback on each element of array until the callback
-     * returns a falsey value, then returns false.
-     * If no such value is found, the callback is applied to each element of array and `true` is returned.
-     */
-    function every<T>(array: ReadonlyArray<T>, callback: (element: T, index: number) => boolean): boolean;
-    /** Works like Array.prototype.find, returning `undefined` if no element satisfying the predicate is found. */
-    function find<T, U extends T>(array: ReadonlyArray<T>, predicate: (element: T, index: number) => element is U): U | undefined;
-    function find<T>(array: ReadonlyArray<T>, predicate: (element: T, index: number) => boolean): T | undefined;
-    function findLast<T, U extends T>(array: ReadonlyArray<T>, predicate: (element: T, index: number) => element is U): U | undefined;
-    function findLast<T>(array: ReadonlyArray<T>, predicate: (element: T, index: number) => boolean): T | undefined;
-    /** Works like Array.prototype.findIndex, returning `-1` if no element satisfying the predicate is found. */
-    function findIndex<T>(array: ReadonlyArray<T>, predicate: (element: T, index: number) => boolean, startIndex?: number): number;
-    function findLastIndex<T>(array: ReadonlyArray<T>, predicate: (element: T, index: number) => boolean, startIndex?: number): number;
-    /**
-     * Returns the first truthy result of `callback`, or else fails.
-     * This is like `forEach`, but never returns undefined.
-     */
-    function findMap<T, U>(array: ReadonlyArray<T>, callback: (element: T, index: number) => U | undefined): U;
-    function contains<T>(array: ReadonlyArray<T> | undefined, value: T, equalityComparer?: EqualityComparer<T>): boolean;
-    function arraysEqual<T>(a: ReadonlyArray<T>, b: ReadonlyArray<T>, equalityComparer?: EqualityComparer<T>): boolean;
-    function indexOfAnyCharCode(text: string, charCodes: ReadonlyArray<number>, start?: number): number;
-    function countWhere<T>(array: ReadonlyArray<T>, predicate: (x: T, i: number) => boolean): number;
-    /**
-     * Filters an array by a predicate function. Returns the same array instance if the predicate is
-     * true for all elements, otherwise returns a new array instance containing the filtered subset.
-     */
-    function filter<T, U extends T>(array: T[], f: (x: T) => x is U): U[];
-    function filter<T>(array: T[], f: (x: T) => boolean): T[];
-    function filter<T, U extends T>(array: ReadonlyArray<T>, f: (x: T) => x is U): ReadonlyArray<U>;
-    function filter<T, U extends T>(array: ReadonlyArray<T>, f: (x: T) => boolean): ReadonlyArray<T>;
-    function filter<T, U extends T>(array: T[] | undefined, f: (x: T) => x is U): U[] | undefined;
-    function filter<T>(array: T[] | undefined, f: (x: T) => boolean): T[] | undefined;
-    function filter<T, U extends T>(array: ReadonlyArray<T> | undefined, f: (x: T) => x is U): ReadonlyArray<U> | undefined;
-    function filter<T, U extends T>(array: ReadonlyArray<T> | undefined, f: (x: T) => boolean): ReadonlyArray<T> | undefined;
-    function filterMutate<T>(array: T[], f: (x: T, i: number, array: T[]) => boolean): void;
-    function clear(array: {}[]): void;
-    function map<T, U>(array: ReadonlyArray<T>, f: (x: T, i: number) => U): U[];
-    function map<T, U>(array: ReadonlyArray<T> | undefined, f: (x: T, i: number) => U): U[] | undefined;
-    function mapIterator<T, U>(iter: Iterator<T>, mapFn: (x: T) => U): Iterator<U>;
-    function sameMap<T>(array: T[], f: (x: T, i: number) => T): T[];
-    function sameMap<T>(array: ReadonlyArray<T>, f: (x: T, i: number) => T): ReadonlyArray<T>;
-    function sameMap<T>(array: T[] | undefined, f: (x: T, i: number) => T): T[] | undefined;
-    function sameMap<T>(array: ReadonlyArray<T> | undefined, f: (x: T, i: number) => T): ReadonlyArray<T> | undefined;
-    /**
-     * Flattens an array containing a mix of array or non-array elements.
-     *
-     * @param array The array to flatten.
-     */
-    function flatten<T>(array: ReadonlyArray<T | ReadonlyArray<T> | undefined>): T[];
-    function flatten<T>(array: ReadonlyArray<T | ReadonlyArray<T> | undefined> | undefined): T[] | undefined;
-    /**
-     * Maps an array. If the mapped value is an array, it is spread into the result.
-     *
-     * @param array The array to map.
-     * @param mapfn The callback used to map the result into one or more values.
-     */
-    function flatMap<T, U>(array: ReadonlyArray<T>, mapfn: (x: T, i: number) => U | ReadonlyArray<U> | undefined): U[];
-    function flatMap<T, U>(array: ReadonlyArray<T> | undefined, mapfn: (x: T, i: number) => U | ReadonlyArray<U> | undefined): U[] | undefined;
-    function flatMapIterator<T, U>(iter: Iterator<T>, mapfn: (x: T) => U[] | Iterator<U> | undefined): Iterator<U>;
-    /**
-     * Maps an array. If the mapped value is an array, it is spread into the result.
-     * Avoids allocation if all elements map to themselves.
-     *
-     * @param array The array to map.
-     * @param mapfn The callback used to map the result into one or more values.
-     */
-    function sameFlatMap<T>(array: T[], mapfn: (x: T, i: number) => T | ReadonlyArray<T>): T[];
-    function sameFlatMap<T>(array: ReadonlyArray<T>, mapfn: (x: T, i: number) => T | ReadonlyArray<T>): ReadonlyArray<T>;
-    function mapAllOrFail<T, U>(array: ReadonlyArray<T>, mapFn: (x: T, i: number) => U | undefined): U[] | undefined;
-    function mapDefined<T, U>(array: ReadonlyArray<T> | undefined, mapFn: (x: T, i: number) => U | undefined): U[];
-    function mapDefinedIterator<T, U>(iter: Iterator<T>, mapFn: (x: T) => U | undefined): Iterator<U>;
-    const emptyIterator: Iterator<never>;
-    function singleIterator<T>(value: T): Iterator<T>;
-    /**
-     * Maps contiguous spans of values with the same key.
-     *
-     * @param array The array to map.
-     * @param keyfn A callback used to select the key for an element.
-     * @param mapfn A callback used to map a contiguous chunk of values to a single value.
-     */
-    function spanMap<T, K, U>(array: ReadonlyArray<T>, keyfn: (x: T, i: number) => K, mapfn: (chunk: T[], key: K, start: number, end: number) => U): U[];
-    function spanMap<T, K, U>(array: ReadonlyArray<T> | undefined, keyfn: (x: T, i: number) => K, mapfn: (chunk: T[], key: K, start: number, end: number) => U): U[] | undefined;
-    function mapEntries<T, U>(map: ReadonlyMap<T>, f: (key: string, value: T) => [string, U]): Map<U>;
-    function mapEntries<T, U>(map: ReadonlyMap<T> | undefined, f: (key: string, value: T) => [string, U]): Map<U> | undefined;
-    function some<T>(array: ReadonlyArray<T> | undefined): array is ReadonlyArray<T>;
-    function some<T>(array: ReadonlyArray<T> | undefined, predicate: (value: T) => boolean): boolean;
-    /** Calls the callback with (start, afterEnd) index pairs for each range where 'pred' is true. */
-    function getRangesWhere<T>(arr: ReadonlyArray<T>, pred: (t: T) => boolean, cb: (start: number, afterEnd: number) => void): void;
-    function concatenate<T>(array1: T[], array2: T[]): T[];
-    function concatenate<T>(array1: ReadonlyArray<T>, array2: ReadonlyArray<T>): ReadonlyArray<T>;
-    function concatenate<T>(array1: T[] | undefined, array2: T[] | undefined): T[];
-    function concatenate<T>(array1: ReadonlyArray<T> | undefined, array2: ReadonlyArray<T> | undefined): ReadonlyArray<T>;
-    /**
-     * Deduplicates an unsorted array.
-     * @param equalityComparer An optional `EqualityComparer` used to determine if two values are duplicates.
-     * @param comparer An optional `Comparer` used to sort entries before comparison, though the
-     * result will remain in the original order in `array`.
-     */
-    function deduplicate<T>(array: ReadonlyArray<T>, equalityComparer?: EqualityComparer<T>, comparer?: Comparer<T>): T[];
-    function deduplicate<T>(array: ReadonlyArray<T> | undefined, equalityComparer?: EqualityComparer<T>, comparer?: Comparer<T>): T[] | undefined;
-    function insertSorted<T>(array: SortedArray<T>, insert: T, compare: Comparer<T>): void;
-    function sortAndDeduplicate<T>(array: ReadonlyArray<T>, comparer: Comparer<T>, equalityComparer?: EqualityComparer<T>): T[];
-    function arrayIsEqualTo<T>(array1: ReadonlyArray<T> | undefined, array2: ReadonlyArray<T> | undefined, equalityComparer?: (a: T, b: T) => boolean): boolean;
-    /**
-     * Compacts an array, removing any falsey elements.
-     */
-    function compact<T>(array: T[]): T[];
-    function compact<T>(array: ReadonlyArray<T>): ReadonlyArray<T>;
-    /**
-     * Gets the relative complement of `arrayA` with respect to `arrayB`, returning the elements that
-     * are not present in `arrayA` but are present in `arrayB`. Assumes both arrays are sorted
-     * based on the provided comparer.
-     */
-    function relativeComplement<T>(arrayA: T[] | undefined, arrayB: T[] | undefined, comparer: Comparer<T>): T[] | undefined;
-    function sum<T extends Record<K, number>, K extends string>(array: ReadonlyArray<T>, prop: K): number;
-    /**
-     * Appends a value to an array, returning the array.
-     *
-     * @param to The array to which `value` is to be appended. If `to` is `undefined`, a new array
-     * is created if `value` was appended.
-     * @param value The value to append to the array. If `value` is `undefined`, nothing is
-     * appended.
-     */
-    function append<T>(to: T[], value: T | undefined): T[];
-    function append<T>(to: T[] | undefined, value: T): T[];
-    function append<T>(to: T[] | undefined, value: T | undefined): T[] | undefined;
-    function append<T>(to: Push<T>, value: T | undefined): void;
-    /**
-     * Appends a range of value to an array, returning the array.
-     *
-     * @param to The array to which `value` is to be appended. If `to` is `undefined`, a new array
-     * is created if `value` was appended.
-     * @param from The values to append to the array. If `from` is `undefined`, nothing is
-     * appended. If an element of `from` is `undefined`, that element is not appended.
-     * @param start The offset in `from` at which to start copying values.
-     * @param end The offset in `from` at which to stop copying values (non-inclusive).
-     */
-    function addRange<T>(to: T[], from: ReadonlyArray<T> | undefined, start?: number, end?: number): T[];
-    function addRange<T>(to: T[] | undefined, from: ReadonlyArray<T> | undefined, start?: number, end?: number): T[] | undefined;
-    /**
-     * @return Whether the value was added.
-     */
-    function pushIfUnique<T>(array: T[], toAdd: T, equalityComparer?: EqualityComparer<T>): boolean;
-    /**
-     * Unlike `pushIfUnique`, this can take `undefined` as an input, and returns a new array.
-     */
-    function appendIfUnique<T>(array: T[] | undefined, toAdd: T, equalityComparer?: EqualityComparer<T>): T[];
-    /**
-     * Returns a new sorted array.
-     */
-    function sort<T>(array: ReadonlyArray<T>, comparer: Comparer<T>): T[];
-    function best<T>(iter: Iterator<T>, isBetter: (a: T, b: T) => boolean): T | undefined;
-    function arrayIterator<T>(array: ReadonlyArray<T>): Iterator<T>;
-    /**
-     * Stable sort of an array. Elements equal to each other maintain their relative position in the array.
-     */
-    function stableSort<T>(array: ReadonlyArray<T>, comparer: Comparer<T>): T[];
-    function rangeEquals<T>(array1: ReadonlyArray<T>, array2: ReadonlyArray<T>, pos: number, end: number): boolean;
-    /**
-     * Returns the element at a specific offset in an array if non-empty, `undefined` otherwise.
-     * A negative offset indicates the element should be retrieved from the end of the array.
-     */
-    function elementAt<T>(array: ReadonlyArray<T> | undefined, offset: number): T | undefined;
-    /**
-     * Returns the first element of an array if non-empty, `undefined` otherwise.
-     */
-    function firstOrUndefined<T>(array: ReadonlyArray<T>): T | undefined;
-    function first<T>(array: ReadonlyArray<T>): T;
-    /**
-     * Returns the last element of an array if non-empty, `undefined` otherwise.
-     */
-    function lastOrUndefined<T>(array: ReadonlyArray<T>): T | undefined;
-    function last<T>(array: ReadonlyArray<T>): T;
-    /**
-     * Returns the only element of an array if it contains only one element, `undefined` otherwise.
-     */
-    function singleOrUndefined<T>(array: ReadonlyArray<T> | undefined): T | undefined;
-    /**
-     * Returns the only element of an array if it contains only one element; otheriwse, returns the
-     * array.
-     */
-    function singleOrMany<T>(array: T[]): T | T[];
-    function singleOrMany<T>(array: ReadonlyArray<T>): T | ReadonlyArray<T>;
-    function singleOrMany<T>(array: T[] | undefined): T | T[] | undefined;
-    function singleOrMany<T>(array: ReadonlyArray<T> | undefined): T | ReadonlyArray<T> | undefined;
-    function replaceElement<T>(array: ReadonlyArray<T>, index: number, value: T): T[];
-    /**
-     * Performs a binary search, finding the index at which `value` occurs in `array`.
-     * If no such index is found, returns the 2's-complement of first index at which
-     * `array[index]` exceeds `value`.
-     * @param array A sorted array whose first element must be no larger than number
-     * @param value The value to be searched for in the array.
-     * @param keySelector A callback used to select the search key from `value` and each element of
-     * `array`.
-     * @param keyComparer A callback used to compare two keys in a sorted array.
-     * @param offset An offset into `array` at which to start the search.
-     */
-    function binarySearch<T, U>(array: ReadonlyArray<T>, value: T, keySelector: (v: T) => U, keyComparer: Comparer<U>, offset?: number): number;
-    function reduceLeft<T, U>(array: ReadonlyArray<T> | undefined, f: (memo: U, value: T, i: number) => U, initial: U, start?: number, count?: number): U;
-    function reduceLeft<T>(array: ReadonlyArray<T>, f: (memo: T, value: T, i: number) => T): T | undefined;
-    /**
-     * Indicates whether a map-like contains an own property with the specified key.
-     *
-     * @param map A map-like.
-     * @param key A property key.
-     */
-    function hasProperty(map: MapLike<any>, key: string): boolean;
-    /**
-     * Gets the value of an owned property in a map-like.
-     *
-     * @param map A map-like.
-     * @param key A property key.
-     */
-    function getProperty<T>(map: MapLike<T>, key: string): T | undefined;
-    /**
-     * Gets the owned, enumerable property keys of a map-like.
-     */
-    function getOwnKeys<T>(map: MapLike<T>): string[];
-    function getOwnValues<T>(sparseArray: T[]): T[];
-    /** Shims `Array.from`. */
-    function arrayFrom<T, U>(iterator: Iterator<T>, map: (t: T) => U): U[];
-    function arrayFrom<T>(iterator: Iterator<T>): T[];
-    function assign<T extends object>(t: T, ...args: (T | undefined)[]): T;
-    /**
-     * Performs a shallow equality comparison of the contents of two map-likes.
-     *
-     * @param left A map-like whose properties should be compared.
-     * @param right A map-like whose properties should be compared.
-     */
-    function equalOwnProperties<T>(left: MapLike<T> | undefined, right: MapLike<T> | undefined, equalityComparer?: EqualityComparer<T>): boolean;
-    /**
-     * Creates a map from the elements of an array.
-     *
-     * @param array the array of input elements.
-     * @param makeKey a function that produces a key for a given element.
-     *
-     * This function makes no effort to avoid collisions; if any two elements produce
-     * the same key with the given 'makeKey' function, then the element with the higher
-     * index in the array will be the one associated with the produced key.
-     */
-    function arrayToMap<T>(array: ReadonlyArray<T>, makeKey: (value: T) => string | undefined): Map<T>;
-    function arrayToMap<T, U>(array: ReadonlyArray<T>, makeKey: (value: T) => string | undefined, makeValue: (value: T) => U): Map<U>;
-    function arrayToNumericMap<T>(array: ReadonlyArray<T>, makeKey: (value: T) => number): T[];
-    function arrayToNumericMap<T, U>(array: ReadonlyArray<T>, makeKey: (value: T) => number, makeValue: (value: T) => U): U[];
-    function arrayToMultiMap<T>(values: ReadonlyArray<T>, makeKey: (value: T) => string): MultiMap<T>;
-    function arrayToMultiMap<T, U>(values: ReadonlyArray<T>, makeKey: (value: T) => string, makeValue: (value: T) => U): MultiMap<U>;
-    function group<T>(values: ReadonlyArray<T>, getGroupId: (value: T) => string): ReadonlyArray<ReadonlyArray<T>>;
-    function clone<T>(object: T): T;
-    function extend<T1, T2>(first: T1, second: T2): T1 & T2;
-    interface MultiMap<T> extends Map<T[]> {
-        /**
-         * Adds the value to an array of values associated with the key, and returns the array.
-         * Creates the array if it does not already exist.
-         */
-        add(key: string, value: T): T[];
-        /**
-         * Removes a value from an array of values associated with the key.
-         * Does not preserve the order of those values.
-         * Does nothing if `key` is not in `map`, or `value` is not in `map[key]`.
-         */
-        remove(key: string, value: T): void;
-    }
-    function createMultiMap<T>(): MultiMap<T>;
-    /**
-     * Tests whether a value is an array.
-     */
-    function isArray(value: any): value is ReadonlyArray<{}>;
-    function toArray<T>(value: T | T[]): T[];
-    function toArray<T>(value: T | ReadonlyArray<T>): ReadonlyArray<T>;
-    /**
-     * Tests whether a value is string
-     */
-    function isString(text: any): text is string;
-    function tryCast<TOut extends TIn, TIn = any>(value: TIn | undefined, test: (value: TIn) => value is TOut): TOut | undefined;
-    function cast<TOut extends TIn, TIn = any>(value: TIn | undefined, test: (value: TIn) => value is TOut): TOut;
-    /** Does nothing. */
-    function noop(_?: {} | null | undefined): void;
-    /** Do nothing and return false */
-    function returnFalse(): false;
-    /** Do nothing and return true */
-    function returnTrue(): true;
-    /** Returns its argument. */
-    function identity<T>(x: T): T;
-    /** Returns lower case string */
-    function toLowerCase(x: string): string;
-    /** Throws an error because a function is not implemented. */
-    function notImplemented(): never;
-    function memoize<T>(callback: () => T): () => T;
-    /**
-     * High-order function, creates a function that executes a function composition.
-     * For example, `chain(a, b)` is the equivalent of `x => ((a', b') => y => b'(a'(y)))(a(x), b(x))`
-     *
-     * @param args The functions to chain.
-     */
-    function chain<T, U>(...args: ((t: T) => (u: U) => U)[]): (t: T) => (u: U) => U;
-    /**
-     * High-order function, composes functions. Note that functions are composed inside-out;
-     * for example, `compose(a, b)` is the equivalent of `x => b(a(x))`.
-     *
-     * @param args The functions to compose.
-     */
-    function compose<T>(...args: ((t: T) => T)[]): (t: T) => T;
-    enum AssertionLevel {
-        None = 0,
-        Normal = 1,
-        Aggressive = 2,
-        VeryAggressive = 3
-    }
-    /**
-     * Safer version of `Function` which should not be called.
-     * Every function should be assignable to this, but this should not be assignable to every function.
-     */
-    type AnyFunction = (...args: never[]) => void;
-    namespace Debug {
-        let currentAssertionLevel: AssertionLevel;
-        let isDebugging: boolean;
-        function shouldAssert(level: AssertionLevel): boolean;
-        function assert(expression: boolean, message?: string, verboseDebugInfo?: string | (() => string), stackCrawlMark?: AnyFunction): void;
-        function assertEqual<T>(a: T, b: T, msg?: string, msg2?: string): void;
-        function assertLessThan(a: number, b: number, msg?: string): void;
-        function assertLessThanOrEqual(a: number, b: number): void;
-        function assertGreaterThanOrEqual(a: number, b: number): void;
-        function fail(message?: string, stackCrawlMark?: AnyFunction): never;
-        function assertDefined<T>(value: T | null | undefined, message?: string): T;
-        function assertEachDefined<T, A extends ReadonlyArray<T>>(value: A, message?: string): A;
-        function assertNever(member: never, message?: string, stackCrawlMark?: AnyFunction): never;
-        function getFunctionName(func: AnyFunction): any;
-    }
-    function equateValues<T>(a: T, b: T): boolean;
-    /**
-     * Compare the equality of two strings using a case-sensitive ordinal comparison.
-     *
-     * Case-sensitive comparisons compare both strings one code-point at a time using the integer
-     * value of each code-point after applying `toUpperCase` to each string. We always map both
-     * strings to their upper-case form as some unicode characters do not properly round-trip to
-     * lowercase (such as `ẞ` (German sharp capital s)).
-     */
-    function equateStringsCaseInsensitive(a: string, b: string): boolean;
-    /**
-     * Compare the equality of two strings using a case-sensitive ordinal comparison.
-     *
-     * Case-sensitive comparisons compare both strings one code-point at a time using the
-     * integer value of each code-point.
-     */
-    function equateStringsCaseSensitive(a: string, b: string): boolean;
-    /**
-     * Compare two numeric values for their order relative to each other.
-     * To compare strings, use any of the `compareStrings` functions.
-     */
-    function compareValues(a: number | undefined, b: number | undefined): Comparison;
-    function min<T>(a: T, b: T, compare: Comparer<T>): T;
-    /**
-     * Compare two strings using a case-insensitive ordinal comparison.
-     *
-     * Ordinal comparisons are based on the difference between the unicode code points of both
-     * strings. Characters with multiple unicode representations are considered unequal. Ordinal
-     * comparisons provide predictable ordering, but place "a" after "B".
-     *
-     * Case-insensitive comparisons compare both strings one code-point at a time using the integer
-     * value of each code-point after applying `toUpperCase` to each string. We always map both
-     * strings to their upper-case form as some unicode characters do not properly round-trip to
-     * lowercase (such as `ẞ` (German sharp capital s)).
-     */
-    function compareStringsCaseInsensitive(a: string, b: string): Comparison;
-    /**
-     * Compare two strings using a case-sensitive ordinal comparison.
-     *
-     * Ordinal comparisons are based on the difference between the unicode code points of both
-     * strings. Characters with multiple unicode representations are considered unequal. Ordinal
-     * comparisons provide predictable ordering, but place "a" after "B".
-     *
-     * Case-sensitive comparisons compare both strings one code-point at a time using the integer
-     * value of each code-point.
-     */
-    function compareStringsCaseSensitive(a: string | undefined, b: string | undefined): Comparison;
-    function getStringComparer(ignoreCase?: boolean): typeof compareStringsCaseInsensitive;
-    function getUILocale(): string | undefined;
-    function setUILocale(value: string | undefined): void;
-    /**
-     * Compare two strings in a using the case-sensitive sort behavior of the UI locale.
-     *
-     * Ordering is not predictable between different host locales, but is best for displaying
-     * ordered data for UI presentation. Characters with multiple unicode representations may
-     * be considered equal.
-     *
-     * Case-sensitive comparisons compare strings that differ in base characters, or
-     * accents/diacritic marks, or case as unequal.
-     */
-    function compareStringsCaseSensitiveUI(a: string, b: string): Comparison;
-    function compareProperties<T, K extends keyof T>(a: T | undefined, b: T | undefined, key: K, comparer: Comparer<T[K]>): Comparison;
-    /** True is greater than false. */
-    function compareBooleans(a: boolean, b: boolean): Comparison;
-    /**
-     * Given a name and a list of names that are *not* equal to the name, return a spelling suggestion if there is one that is close enough.
-     * Names less than length 3 only check for case-insensitive equality, not Levenshtein distance.
-     *
-     * If there is a candidate that's the same except for case, return that.
-     * If there is a candidate that's within one edit of the name, return that.
-     * Otherwise, return the candidate with the smallest Levenshtein distance,
-     *    except for candidates:
-     *      * With no name
-     *      * Whose length differs from the target name by more than 0.34 of the length of the name.
-     *      * Whose levenshtein distance is more than 0.4 of the length of the name
-     *        (0.4 allows 1 substitution/transposition for every 5 characters,
-     *         and 1 insertion/deletion at 3 characters)
-     */
-    function getSpellingSuggestion<T>(name: string, candidates: T[], getName: (candidate: T) => string | undefined): T | undefined;
-    function endsWith(str: string, suffix: string): boolean;
-    function removeSuffix(str: string, suffix: string): string;
-    function tryRemoveSuffix(str: string, suffix: string): string | undefined;
-    function stringContains(str: string, substring: string): boolean;
-    function fileExtensionIs(path: string, extension: string): boolean;
-    function fileExtensionIsOneOf(path: string, extensions: ReadonlyArray<string>): boolean;
-    /**
-     * Takes a string like "jquery-min.4.2.3" and returns "jquery"
-     */
-    function removeMinAndVersionNumbers(fileName: string): string;
-    /** Remove an item from an array, moving everything to its right one space left. */
-    function orderedRemoveItem<T>(array: T[], item: T): boolean;
-    /** Remove an item by index from an array, moving everything to its right one space left. */
-    function orderedRemoveItemAt<T>(array: T[], index: number): void;
-    function unorderedRemoveItemAt<T>(array: T[], index: number): void;
-    /** Remove the *first* occurrence of `item` from the array. */
-    function unorderedRemoveItem<T>(array: T[], item: T): boolean;
-    type GetCanonicalFileName = (fileName: string) => string;
-    function createGetCanonicalFileName(useCaseSensitiveFileNames: boolean): GetCanonicalFileName;
-    /** Represents a "prefix*suffix" pattern. */
-    interface Pattern {
-        prefix: string;
-        suffix: string;
-    }
-    function patternText({ prefix, suffix }: Pattern): string;
-    /**
-     * Given that candidate matches pattern, returns the text matching the '*'.
-     * E.g.: matchedText(tryParsePattern("foo*baz"), "foobarbaz") === "bar"
-     */
-    function matchedText(pattern: Pattern, candidate: string): string;
-    /** Return the object corresponding to the best pattern to match `candidate`. */
-    function findBestPatternMatch<T>(values: ReadonlyArray<T>, getPattern: (value: T) => Pattern, candidate: string): T | undefined;
-    function startsWith(str: string, prefix: string): boolean;
-    function removePrefix(str: string, prefix: string): string;
-    function tryRemovePrefix(str: string, prefix: string): string | undefined;
-    function and<T>(f: (arg: T) => boolean, g: (arg: T) => boolean): (arg: T) => boolean;
-    function or<T>(f: (arg: T) => boolean, g: (arg: T) => boolean): (arg: T) => boolean;
-    function assertTypeIsNever(_: never): void;
-    function singleElementArray<T>(t: T | undefined): T[] | undefined;
-    function enumerateInsertsAndDeletes<T, U>(newItems: ReadonlyArray<T>, oldItems: ReadonlyArray<U>, comparer: (a: T, b: U) => Comparison, inserted: (newItem: T) => void, deleted: (oldItem: U) => void, unchanged?: (oldItem: U, newItem: T) => void): void;
 }
-//# sourceMappingURL=core.d.ts.map
 declare namespace ts {
     type Path = string & {
         __pathBrand: any;
@@ -763,144 +227,146 @@ declare namespace ts {
         ArrayType = 167,
         TupleType = 168,
         OptionalType = 169,
-        UnionType = 170,
-        IntersectionType = 171,
-        ConditionalType = 172,
-        InferType = 173,
-        ParenthesizedType = 174,
-        ThisType = 175,
-        TypeOperator = 176,
-        IndexedAccessType = 177,
-        MappedType = 178,
-        LiteralType = 179,
-        ImportType = 180,
-        ObjectBindingPattern = 181,
-        ArrayBindingPattern = 182,
-        BindingElement = 183,
-        ArrayLiteralExpression = 184,
-        ObjectLiteralExpression = 185,
-        PropertyAccessExpression = 186,
-        ElementAccessExpression = 187,
-        CallExpression = 188,
-        NewExpression = 189,
-        TaggedTemplateExpression = 190,
-        TypeAssertionExpression = 191,
-        ParenthesizedExpression = 192,
-        FunctionExpression = 193,
-        ArrowFunction = 194,
-        DeleteExpression = 195,
-        TypeOfExpression = 196,
-        VoidExpression = 197,
-        AwaitExpression = 198,
-        PrefixUnaryExpression = 199,
-        PostfixUnaryExpression = 200,
-        BinaryExpression = 201,
-        ConditionalExpression = 202,
-        TemplateExpression = 203,
-        YieldExpression = 204,
-        SpreadElement = 205,
-        ClassExpression = 206,
-        OmittedExpression = 207,
-        ExpressionWithTypeArguments = 208,
-        AsExpression = 209,
-        NonNullExpression = 210,
-        MetaProperty = 211,
-        SyntheticExpression = 212,
-        TemplateSpan = 213,
-        SemicolonClassElement = 214,
-        Block = 215,
-        VariableStatement = 216,
-        EmptyStatement = 217,
-        ExpressionStatement = 218,
-        IfStatement = 219,
-        DoStatement = 220,
-        WhileStatement = 221,
-        ForStatement = 222,
-        ForInStatement = 223,
-        ForOfStatement = 224,
-        ContinueStatement = 225,
-        BreakStatement = 226,
-        ReturnStatement = 227,
-        WithStatement = 228,
-        SwitchStatement = 229,
-        LabeledStatement = 230,
-        ThrowStatement = 231,
-        TryStatement = 232,
-        DebuggerStatement = 233,
-        VariableDeclaration = 234,
-        VariableDeclarationList = 235,
-        FunctionDeclaration = 236,
-        ClassDeclaration = 237,
-        InterfaceDeclaration = 238,
-        TypeAliasDeclaration = 239,
-        EnumDeclaration = 240,
-        ModuleDeclaration = 241,
-        ModuleBlock = 242,
-        CaseBlock = 243,
-        NamespaceExportDeclaration = 244,
-        ImportEqualsDeclaration = 245,
-        ImportDeclaration = 246,
-        ImportClause = 247,
-        NamespaceImport = 248,
-        NamedImports = 249,
-        ImportSpecifier = 250,
-        ExportAssignment = 251,
-        ExportDeclaration = 252,
-        NamedExports = 253,
-        ExportSpecifier = 254,
-        MissingDeclaration = 255,
-        ExternalModuleReference = 256,
-        JsxElement = 257,
-        JsxSelfClosingElement = 258,
-        JsxOpeningElement = 259,
-        JsxClosingElement = 260,
-        JsxFragment = 261,
-        JsxOpeningFragment = 262,
-        JsxClosingFragment = 263,
-        JsxAttribute = 264,
-        JsxAttributes = 265,
-        JsxSpreadAttribute = 266,
-        JsxExpression = 267,
-        CaseClause = 268,
-        DefaultClause = 269,
-        HeritageClause = 270,
-        CatchClause = 271,
-        PropertyAssignment = 272,
-        ShorthandPropertyAssignment = 273,
-        SpreadAssignment = 274,
-        EnumMember = 275,
-        SourceFile = 276,
-        Bundle = 277,
-        UnparsedSource = 278,
-        InputFiles = 279,
-        JSDocTypeExpression = 280,
-        JSDocAllType = 281,
-        JSDocUnknownType = 282,
-        JSDocNullableType = 283,
-        JSDocNonNullableType = 284,
-        JSDocOptionalType = 285,
-        JSDocFunctionType = 286,
-        JSDocVariadicType = 287,
-        JSDocComment = 288,
-        JSDocTypeLiteral = 289,
-        JSDocSignature = 290,
-        JSDocTag = 291,
-        JSDocAugmentsTag = 292,
-        JSDocClassTag = 293,
-        JSDocCallbackTag = 294,
-        JSDocParameterTag = 295,
-        JSDocReturnTag = 296,
-        JSDocTypeTag = 297,
-        JSDocTemplateTag = 298,
-        JSDocTypedefTag = 299,
-        JSDocPropertyTag = 300,
-        SyntaxList = 301,
-        NotEmittedStatement = 302,
-        PartiallyEmittedExpression = 303,
-        CommaListExpression = 304,
-        MergeDeclarationMarker = 305,
-        EndOfDeclarationMarker = 306,
-        Count = 307,
+        RestType = 170,
+        UnionType = 171,
+        IntersectionType = 172,
+        ConditionalType = 173,
+        InferType = 174,
+        ParenthesizedType = 175,
+        ThisType = 176,
+        TypeOperator = 177,
+        IndexedAccessType = 178,
+        MappedType = 179,
+        LiteralType = 180,
+        ImportType = 181,
+        ObjectBindingPattern = 182,
+        ArrayBindingPattern = 183,
+        BindingElement = 184,
+        ArrayLiteralExpression = 185,
+        ObjectLiteralExpression = 186,
+        PropertyAccessExpression = 187,
+        ElementAccessExpression = 188,
+        CallExpression = 189,
+        NewExpression = 190,
+        TaggedTemplateExpression = 191,
+        TypeAssertionExpression = 192,
+        ParenthesizedExpression = 193,
+        FunctionExpression = 194,
+        ArrowFunction = 195,
+        DeleteExpression = 196,
+        TypeOfExpression = 197,
+        VoidExpression = 198,
+        AwaitExpression = 199,
+        PrefixUnaryExpression = 200,
+        PostfixUnaryExpression = 201,
+        BinaryExpression = 202,
+        ConditionalExpression = 203,
+        TemplateExpression = 204,
+        YieldExpression = 205,
+        SpreadElement = 206,
+        ClassExpression = 207,
+        OmittedExpression = 208,
+        ExpressionWithTypeArguments = 209,
+        AsExpression = 210,
+        NonNullExpression = 211,
+        MetaProperty = 212,
+        SyntheticExpression = 213,
+        TemplateSpan = 214,
+        SemicolonClassElement = 215,
+        Block = 216,
+        VariableStatement = 217,
+        EmptyStatement = 218,
+        ExpressionStatement = 219,
+        IfStatement = 220,
+        DoStatement = 221,
+        WhileStatement = 222,
+        ForStatement = 223,
+        ForInStatement = 224,
+        ForOfStatement = 225,
+        ContinueStatement = 226,
+        BreakStatement = 227,
+        ReturnStatement = 228,
+        WithStatement = 229,
+        SwitchStatement = 230,
+        LabeledStatement = 231,
+        ThrowStatement = 232,
+        TryStatement = 233,
+        DebuggerStatement = 234,
+        VariableDeclaration = 235,
+        VariableDeclarationList = 236,
+        FunctionDeclaration = 237,
+        ClassDeclaration = 238,
+        InterfaceDeclaration = 239,
+        TypeAliasDeclaration = 240,
+        EnumDeclaration = 241,
+        ModuleDeclaration = 242,
+        ModuleBlock = 243,
+        CaseBlock = 244,
+        NamespaceExportDeclaration = 245,
+        ImportEqualsDeclaration = 246,
+        ImportDeclaration = 247,
+        ImportClause = 248,
+        NamespaceImport = 249,
+        NamedImports = 250,
+        ImportSpecifier = 251,
+        ExportAssignment = 252,
+        ExportDeclaration = 253,
+        NamedExports = 254,
+        ExportSpecifier = 255,
+        MissingDeclaration = 256,
+        ExternalModuleReference = 257,
+        JsxElement = 258,
+        JsxSelfClosingElement = 259,
+        JsxOpeningElement = 260,
+        JsxClosingElement = 261,
+        JsxFragment = 262,
+        JsxOpeningFragment = 263,
+        JsxClosingFragment = 264,
+        JsxAttribute = 265,
+        JsxAttributes = 266,
+        JsxSpreadAttribute = 267,
+        JsxExpression = 268,
+        CaseClause = 269,
+        DefaultClause = 270,
+        HeritageClause = 271,
+        CatchClause = 272,
+        PropertyAssignment = 273,
+        ShorthandPropertyAssignment = 274,
+        SpreadAssignment = 275,
+        EnumMember = 276,
+        SourceFile = 277,
+        Bundle = 278,
+        UnparsedSource = 279,
+        InputFiles = 280,
+        JSDocTypeExpression = 281,
+        JSDocAllType = 282,
+        JSDocUnknownType = 283,
+        JSDocNullableType = 284,
+        JSDocNonNullableType = 285,
+        JSDocOptionalType = 286,
+        JSDocFunctionType = 287,
+        JSDocVariadicType = 288,
+        JSDocComment = 289,
+        JSDocTypeLiteral = 290,
+        JSDocSignature = 291,
+        JSDocTag = 292,
+        JSDocAugmentsTag = 293,
+        JSDocClassTag = 294,
+        JSDocCallbackTag = 295,
+        JSDocParameterTag = 296,
+        JSDocReturnTag = 297,
+        JSDocThisTag = 298,
+        JSDocTypeTag = 299,
+        JSDocTemplateTag = 300,
+        JSDocTypedefTag = 301,
+        JSDocPropertyTag = 302,
+        SyntaxList = 303,
+        NotEmittedStatement = 304,
+        PartiallyEmittedExpression = 305,
+        CommaListExpression = 306,
+        MergeDeclarationMarker = 307,
+        EndOfDeclarationMarker = 308,
+        Count = 309,
         FirstAssignment = 58,
         LastAssignment = 70,
         FirstCompoundAssignment = 59,
@@ -912,7 +378,7 @@ declare namespace ts {
         FirstFutureReservedWord = 108,
         LastFutureReservedWord = 116,
         FirstTypeNode = 161,
-        LastTypeNode = 180,
+        LastTypeNode = 181,
         FirstPunctuation = 17,
         LastPunctuation = 70,
         FirstToken = 0,
@@ -926,12 +392,10 @@ declare namespace ts {
         FirstBinaryOperator = 27,
         LastBinaryOperator = 70,
         FirstNode = 146,
-        FirstJSDocNode = 280,
-        LastJSDocNode = 300,
-        FirstJSDocTagNode = 291,
-        LastJSDocTagNode = 300,
-        FirstContextualKeyword = 117,
-        LastContextualKeyword = 145
+        FirstJSDocNode = 281,
+        LastJSDocNode = 302,
+        FirstJSDocTagNode = 292,
+        LastJSDocTagNode = 302
     }
     enum NodeFlags {
         None = 0,
@@ -954,18 +418,13 @@ declare namespace ts {
         JavaScriptFile = 65536,
         ThisNodeOrAnySubNodesHasError = 131072,
         HasAggregatedChildData = 262144,
-        PossiblyContainsDynamicImport = 524288,
-        PossiblyContainsImportMeta = 1048576,
         JSDoc = 2097152,
-        Ambient = 4194304,
-        InWithStatement = 8388608,
         JsonFile = 16777216,
         BlockScoped = 3,
         ReachabilityCheckFlags = 384,
         ReachabilityAndEmitFlags = 1408,
         ContextFlags = 12679168,
-        TypeExcludesFlags = 20480,
-        PermanentlySetIncrementalFlags = 1572864
+        TypeExcludesFlags = 20480
     }
     enum ModifierFlags {
         None = 0,
@@ -996,42 +455,21 @@ declare namespace ts {
         IntrinsicIndexedElement = 2,
         IntrinsicElement = 3
     }
-    enum RelationComparisonResult {
-        Succeeded = 1,
-        Failed = 2,
-        FailedAndReported = 3
-    }
     interface Node extends TextRange {
         kind: SyntaxKind;
         flags: NodeFlags;
-        modifierFlagsCache?: ModifierFlags;
-        transformFlags: TransformFlags;
         decorators?: NodeArray<Decorator>;
         modifiers?: ModifiersArray;
-        id?: number;
         parent: Node;
-        original?: Node;
-        symbol: Symbol;
-        locals?: SymbolTable;
-        nextContainer?: Node;
-        localSymbol?: Symbol;
-        flowNode?: FlowNode;
-        emitNode?: EmitNode;
-        contextualType?: Type;
-        contextualMapper?: TypeMapper;
     }
     interface JSDocContainer {
-        jsDoc?: JSDoc[];
-        jsDocCache?: ReadonlyArray<JSDocTag>;
     }
     type HasJSDoc = ParameterDeclaration | CallSignatureDeclaration | ConstructSignatureDeclaration | MethodSignature | PropertySignature | ArrowFunction | ParenthesizedExpression | SpreadAssignment | ShorthandPropertyAssignment | PropertyAssignment | FunctionExpression | LabeledStatement | ExpressionStatement | VariableStatement | FunctionDeclaration | ConstructorDeclaration | MethodDeclaration | PropertyDeclaration | AccessorDeclaration | ClassLikeDeclaration | InterfaceDeclaration | TypeAliasDeclaration | EnumMember | EnumDeclaration | ModuleDeclaration | ImportEqualsDeclaration | IndexSignatureDeclaration | FunctionTypeNode | ConstructorTypeNode | JSDocFunctionType | EndOfFileToken;
     type HasType = SignatureDeclaration | VariableDeclaration | ParameterDeclaration | PropertySignature | PropertyDeclaration | TypePredicateNode | ParenthesizedTypeNode | TypeOperatorNode | MappedTypeNode | AssertionExpression | TypeAliasDeclaration | JSDocTypeExpression | JSDocNonNullableType | JSDocNullableType | JSDocOptionalType | JSDocVariadicType;
     type HasInitializer = HasExpressionInitializer | ForStatement | ForInStatement | ForOfStatement | JsxAttribute;
     type HasExpressionInitializer = VariableDeclaration | ParameterDeclaration | BindingElement | PropertySignature | PropertyDeclaration | PropertyAssignment | EnumMember;
-    type MutableNodeArray<T extends Node> = NodeArray<T> & T[];
     interface NodeArray<T extends Node> extends ReadonlyArray<T>, TextRange {
         hasTrailingComma?: boolean;
-        transformFlags: TransformFlags;
     }
     interface Token<TKind extends SyntaxKind> extends Node {
         kind: TKind;
@@ -1051,17 +489,6 @@ declare namespace ts {
     type MinusToken = Token<SyntaxKind.MinusToken>;
     type Modifier = Token<SyntaxKind.AbstractKeyword> | Token<SyntaxKind.AsyncKeyword> | Token<SyntaxKind.ConstKeyword> | Token<SyntaxKind.DeclareKeyword> | Token<SyntaxKind.DefaultKeyword> | Token<SyntaxKind.ExportKeyword> | Token<SyntaxKind.PublicKeyword> | Token<SyntaxKind.PrivateKeyword> | Token<SyntaxKind.ProtectedKeyword> | Token<SyntaxKind.ReadonlyKeyword> | Token<SyntaxKind.StaticKeyword>;
     type ModifiersArray = NodeArray<Modifier>;
-    enum GeneratedIdentifierFlags {
-        None = 0,
-        Auto = 1,
-        Loop = 2,
-        Unique = 3,
-        Node = 4,
-        KindMask = 7,
-        ReservedInNestedScopes = 8,
-        Optimistic = 16,
-        FileLevel = 32
-    }
     interface Identifier extends PrimaryExpression, Declaration {
         kind: SyntaxKind.Identifier;
         /**
@@ -1070,23 +497,15 @@ declare namespace ts {
          */
         escapedText: __String;
         originalKeywordKind?: SyntaxKind;
-        autoGenerateFlags?: GeneratedIdentifierFlags;
-        autoGenerateId?: number;
         isInJSDocNamespace?: boolean;
-        typeArguments?: NodeArray<TypeNode | TypeParameterDeclaration>;
-        jsdocDotPos?: number;
     }
     interface TransientIdentifier extends Identifier {
         resolvedSymbol: Symbol;
     }
-    interface GeneratedIdentifier extends Identifier {
-        autoGenerateFlags: GeneratedIdentifierFlags;
-    }
     interface QualifiedName extends Node {
         kind: SyntaxKind.QualifiedName;
         left: EntityName;
         right: Identifier;
-        jsdocDotPos?: number;
     }
     type EntityName = Identifier | QualifiedName;
     type PropertyName = Identifier | StringLiteral | NumericLiteral | ComputedPropertyName;
@@ -1097,12 +516,6 @@ declare namespace ts {
     interface NamedDeclaration extends Declaration {
         name?: DeclarationName;
     }
-    interface DynamicNamedDeclaration extends NamedDeclaration {
-        name: ComputedPropertyName;
-    }
-    interface LateBoundDeclaration extends DynamicNamedDeclaration {
-        name: LateBoundName;
-    }
     interface DeclarationStatement extends NamedDeclaration, Statement {
         name?: Identifier | StringLiteral | NumericLiteral;
     }
@@ -1110,9 +523,6 @@ declare namespace ts {
         kind: SyntaxKind.ComputedPropertyName;
         expression: Expression;
     }
-    interface LateBoundName extends ComputedPropertyName {
-        expression: EntityNameExpression;
-    }
     interface Decorator extends Node {
         kind: SyntaxKind.Decorator;
         parent: NamedDeclaration;
@@ -1132,7 +542,6 @@ declare namespace ts {
         typeParameters?: NodeArray<TypeParameterDeclaration>;
         parameters: NodeArray<ParameterDeclaration>;
         type?: TypeNode;
-        typeArguments?: NodeArray<TypeNode>;
     }
     type SignatureDeclaration = CallSignatureDeclaration | ConstructSignatureDeclaration | MethodSignature | IndexSignatureDeclaration | FunctionTypeNode | ConstructorTypeNode | JSDocFunctionType | FunctionDeclaration | MethodDeclaration | ConstructorDeclaration | AccessorDeclaration | FunctionExpression | ArrowFunction;
     interface CallSignatureDeclaration extends SignatureDeclarationBase, TypeElement {
@@ -1172,7 +581,6 @@ declare namespace ts {
         name: BindingName;
         initializer?: Expression;
     }
-    type BindingElementGrandparent = BindingElement["parent"]["parent"];
     interface PropertySignature extends TypeElement, JSDocContainer {
         kind: SyntaxKind.PropertySignature;
         name: PropertyName;
@@ -1267,7 +675,6 @@ declare namespace ts {
         kind: SyntaxKind.Constructor;
         parent: ClassLikeDeclaration;
         body?: FunctionBody;
-        returnFlowNode?: FlowNode;
     }
     /** For when we encounter a semicolon in a class declaration. ES6 allows these as class elements. */
     interface SemicolonClassElement extends ClassElement {
@@ -1303,11 +710,6 @@ declare namespace ts {
         argument: TypeNode;
         qualifier?: EntityName;
     }
-    type LiteralImportTypeNode = ImportTypeNode & {
-        argument: LiteralTypeNode & {
-            literal: StringLiteral;
-        };
-    };
     interface ThisTypeNode extends TypeNode {
         kind: SyntaxKind.ThisType;
     }
@@ -1356,6 +758,10 @@ declare namespace ts {
         kind: SyntaxKind.OptionalType;
         type: TypeNode;
     }
+    interface RestTypeNode extends TypeNode {
+        kind: SyntaxKind.RestType;
+        type: TypeNode;
+    }
     type UnionOrIntersectionTypeNode = UnionTypeNode | IntersectionTypeNode;
     interface UnionTypeNode extends TypeNode {
         kind: SyntaxKind.UnionType;
@@ -1385,9 +791,6 @@ declare namespace ts {
         operator: SyntaxKind.KeyOfKeyword | SyntaxKind.UniqueKeyword;
         type: TypeNode;
     }
-    interface UniqueTypeOperatorNode extends TypeOperatorNode {
-        operator: SyntaxKind.UniqueKeyword;
-    }
     interface IndexedAccessTypeNode extends TypeNode {
         kind: SyntaxKind.IndexedAccessType;
         objectType: TypeNode;
@@ -1406,9 +809,6 @@ declare namespace ts {
     }
     interface StringLiteral extends LiteralExpression {
         kind: SyntaxKind.StringLiteral;
-        textSourceNode?: Identifier | StringLiteralLike | NumericLiteral;
-        /** Note: this is only set when synthesizing a node, not during parsing. */
-        singleQuote?: boolean;
     }
     type StringLiteralLike = StringLiteral | NoSubstitutionTemplateLiteral;
     interface Expression extends Node {
@@ -1570,24 +970,8 @@ declare namespace ts {
     interface NoSubstitutionTemplateLiteral extends LiteralExpression {
         kind: SyntaxKind.NoSubstitutionTemplateLiteral;
     }
-    enum TokenFlags {
-        None = 0,
-        PrecedingLineBreak = 1,
-        PrecedingJSDocComment = 2,
-        Unterminated = 4,
-        ExtendedUnicodeEscape = 8,
-        Scientific = 16,
-        Octal = 32,
-        HexSpecifier = 64,
-        BinarySpecifier = 128,
-        OctalSpecifier = 256,
-        ContainsSeparator = 512,
-        BinaryOrOctalSpecifier = 384,
-        NumericLiteralFlags = 1008
-    }
     interface NumericLiteral extends LiteralExpression {
         kind: SyntaxKind.NumericLiteral;
-        numericLiteralFlags: TokenFlags;
     }
     interface TemplateHead extends LiteralLikeNode {
         kind: SyntaxKind.TemplateHead;
@@ -1620,7 +1004,6 @@ declare namespace ts {
     interface ArrayLiteralExpression extends PrimaryExpression {
         kind: SyntaxKind.ArrayLiteralExpression;
         elements: NodeArray<Expression>;
-        multiLine?: boolean;
     }
     interface SpreadElement extends Expression {
         kind: SyntaxKind.SpreadElement;
@@ -1638,7 +1021,6 @@ declare namespace ts {
     }
     interface ObjectLiteralExpression extends ObjectLiteralExpressionBase<ObjectLiteralElementLike> {
         kind: SyntaxKind.ObjectLiteralExpression;
-        multiLine?: boolean;
     }
     type EntityNameExpression = Identifier | PropertyAccessEntityNameExpression;
     type EntityNameOrEntityNameExpression = EntityName | EntityNameExpression;
@@ -1787,12 +1169,6 @@ declare namespace ts {
     interface NotEmittedStatement extends Statement {
         kind: SyntaxKind.NotEmittedStatement;
     }
-    /**
-     * Marks the end of transformed declaration to properly emit exports.
-     */
-    interface EndOfDeclarationMarker extends Statement {
-        kind: SyntaxKind.EndOfDeclarationMarker;
-    }
     /**
      * A list of comma-separated expressions. This node is only created by transformations.
      */
@@ -1800,12 +1176,6 @@ declare namespace ts {
         kind: SyntaxKind.CommaListExpression;
         elements: NodeArray<Expression>;
     }
-    /**
-     * Marks the beginning of a merged transformed declaration.
-     */
-    interface MergeDeclarationMarker extends Statement {
-        kind: SyntaxKind.MergeDeclarationMarker;
-    }
     interface EmptyStatement extends Statement {
         kind: SyntaxKind.EmptyStatement;
     }
@@ -1820,7 +1190,6 @@ declare namespace ts {
     interface Block extends Statement {
         kind: SyntaxKind.Block;
         statements: NodeArray<Statement>;
-        multiLine?: boolean;
     }
     interface VariableStatement extends Statement, JSDocContainer {
         kind: SyntaxKind.VariableStatement;
@@ -1830,9 +1199,6 @@ declare namespace ts {
         kind: SyntaxKind.ExpressionStatement;
         expression: Expression;
     }
-    interface PrologueDirective extends ExpressionStatement {
-        expression: StringLiteral;
-    }
     interface IfStatement extends Statement {
         kind: SyntaxKind.IfStatement;
         expression: Expression;
@@ -1990,9 +1356,6 @@ declare namespace ts {
     }
     type ModuleName = Identifier | StringLiteral;
     type ModuleBody = NamespaceBody | JSDocNamespaceBody;
-    interface AmbientModuleDeclaration extends ModuleDeclaration {
-        body?: ModuleBlock;
-    }
     interface ModuleDeclaration extends DeclarationStatement, JSDocContainer {
         kind: SyntaxKind.ModuleDeclaration;
         parent: ModuleBody | SourceFile;
@@ -2173,6 +1536,10 @@ declare namespace ts {
     interface JSDocClassTag extends JSDocTag {
         kind: SyntaxKind.JSDocClassTag;
     }
+    interface JSDocThisTag extends JSDocTag {
+        kind: SyntaxKind.JSDocThisTag;
+        typeExpression?: JSDocTypeExpression;
+    }
     interface JSDocTemplateTag extends JSDocTag {
         kind: SyntaxKind.JSDocTemplateTag;
         typeParameters: NodeArray<TypeParameterDeclaration>;
@@ -2290,36 +1657,12 @@ declare namespace ts {
         path: string;
         name?: string;
     }
-    /**
-     * Subset of properties from SourceFile that are used in multiple utility functions
-     */
-    interface SourceFileLike {
-        readonly text: string;
-        lineMap?: ReadonlyArray<number>;
-    }
-    interface RedirectInfo {
-        /** Source file this redirects to. */
-        readonly redirectTarget: SourceFile;
-        /**
-         * Source file for the duplicate package. This will not be used by the Program,
-         * but we need to keep this around so we can watch for changes in underlying.
-         */
-        readonly unredirected: SourceFile;
-    }
     interface SourceFile extends Declaration {
         kind: SyntaxKind.SourceFile;
         statements: NodeArray<Statement>;
         endOfFileToken: Token<SyntaxKind.EndOfFileToken>;
         fileName: string;
-        path: Path;
         text: string;
-        resolvedPath: Path;
-        /**
-         * If two source files are for the same version of the same package, one will redirect to the other.
-         * (See `createRedirectSourceFile` in program.ts.)
-         * The redirect will have this set. The redirected-to source file will be in `redirectTargetsSet`.
-         */
-        redirectInfo?: RedirectInfo;
         amdDependencies: ReadonlyArray<AmdDependency>;
         moduleName?: string;
         referencedFiles: ReadonlyArray<FileReference>;
@@ -2327,7 +1670,6 @@ declare namespace ts {
         libReferenceDirectives: ReadonlyArray<FileReference>;
         languageVariant: LanguageVariant;
         isDeclarationFile: boolean;
-        renamedDependencies?: ReadonlyMap<string>;
         /**
          * lib.d.ts should have a reference comment like
          *
@@ -2338,60 +1680,25 @@ declare namespace ts {
          */
         hasNoDefaultLib: boolean;
         languageVersion: ScriptTarget;
-        scriptKind: ScriptKind;
-        /**
-         * The first "most obvious" node that makes a file an external module.
-         * This is intended to be the first top-level import/export,
-         * but could be arbitrarily nested (e.g. `import.meta`).
-         */
-        externalModuleIndicator?: Node;
-        commonJsModuleIndicator?: Node;
-        identifiers: Map<string>;
-        nodeCount: number;
-        identifierCount: number;
-        symbolCount: number;
-        parseDiagnostics: DiagnosticWithLocation[];
-        bindDiagnostics: DiagnosticWithLocation[];
-        bindSuggestionDiagnostics?: DiagnosticWithLocation[];
-        jsDocDiagnostics?: DiagnosticWithLocation[];
-        additionalSyntacticDiagnostics?: ReadonlyArray<DiagnosticWithLocation>;
-        lineMap: ReadonlyArray<number>;
-        classifiableNames?: ReadonlyUnderscoreEscapedMap<true>;
-        resolvedModules?: Map<ResolvedModuleFull | undefined>;
-        resolvedTypeReferenceDirectiveNames: Map<ResolvedTypeReferenceDirective>;
-        imports: ReadonlyArray<StringLiteralLike>;
-        /**
-         * When a file's references are redirected due to project reference directives,
-         * the original names of the references are stored in this array
-         */
-        redirectedReferences?: ReadonlyArray<string>;
-        moduleAugmentations: ReadonlyArray<StringLiteral | Identifier>;
-        patternAmbientModules?: PatternAmbientModule[];
-        ambientModuleNames: ReadonlyArray<string>;
-        checkJsDirective?: CheckJsDirective;
-        version: string;
-        pragmas: PragmaMap;
-        localJsxNamespace?: __String;
-        localJsxFactory?: EntityName;
     }
     interface Bundle extends Node {
         kind: SyntaxKind.Bundle;
         prepends: ReadonlyArray<InputFiles | UnparsedSource>;
         sourceFiles: ReadonlyArray<SourceFile>;
-        syntheticFileReferences?: ReadonlyArray<FileReference>;
-        syntheticTypeReferences?: ReadonlyArray<FileReference>;
-        hasNoDefaultLib?: boolean;
     }
     interface InputFiles extends Node {
         kind: SyntaxKind.InputFiles;
         javascriptText: string;
+        javascriptMapPath?: string;
         javascriptMapText?: string;
         declarationText: string;
+        declarationMapPath?: string;
         declarationMapText?: string;
     }
     interface UnparsedSource extends Node {
         kind: SyntaxKind.UnparsedSource;
         text: string;
+        sourceMapPath?: string;
         sourceMapText?: string;
     }
     interface JsonSourceFile extends SourceFile {
@@ -2441,11 +1748,6 @@ declare namespace ts {
          * Get a list of files in the program
          */
         getSourceFiles(): ReadonlyArray<SourceFile>;
-        /**
-         * Get a list of file names that were passed to 'createProgram' or referenced in a
-         * program source file but could not be located.
-         */
-        getMissingFilePaths(): ReadonlyArray<Path>;
         /**
          * Emits the JavaScript and declaration files.  If targetSourceFile is not specified, then
          * the JavaScript and declaration files will be produced for all the files in this program.
@@ -2464,44 +1766,17 @@ declare namespace ts {
         getSemanticDiagnostics(sourceFile?: SourceFile, cancellationToken?: CancellationToken): ReadonlyArray<Diagnostic>;
         getDeclarationDiagnostics(sourceFile?: SourceFile, cancellationToken?: CancellationToken): ReadonlyArray<DiagnosticWithLocation>;
         getConfigFileParsingDiagnostics(): ReadonlyArray<Diagnostic>;
-        getSuggestionDiagnostics(sourceFile: SourceFile, cancellationToken?: CancellationToken): ReadonlyArray<DiagnosticWithLocation>;
         /**
          * Gets a type checker that can be used to semantically analyze source files in the program.
          */
         getTypeChecker(): TypeChecker;
-        getCommonSourceDirectory(): string;
-        getDiagnosticsProducingTypeChecker(): TypeChecker;
-        dropDiagnosticsProducingTypeChecker(): void;
-        getClassifiableNames(): UnderscoreEscapedMap<true>;
-        getNodeCount(): number;
-        getIdentifierCount(): number;
-        getSymbolCount(): number;
-        getTypeCount(): number;
-        getFileProcessingDiagnostics(): DiagnosticCollection;
-        getResolvedTypeReferenceDirectives(): Map<ResolvedTypeReferenceDirective>;
         isSourceFileFromExternalLibrary(file: SourceFile): boolean;
-        isSourceFileDefaultLibrary(file: SourceFile): boolean;
-        structureIsReused?: StructureIsReused;
-        getSourceFileFromReference(referencingFile: SourceFile, ref: FileReference): SourceFile | undefined;
-        getLibFileFromReference(ref: FileReference): SourceFile | undefined;
-        /** Given a source file, get the name of the package it was imported from. */
-        sourceFileToPackageName: Map<string>;
-        /** Set of all source files that some other source file redirects to. */
-        redirectTargetsSet: Map<true>;
-        /** Is the file emitted file */
-        isEmittedFile(file: string): boolean;
-        getResolvedModuleWithFailedLookupLocationsFromCache(moduleName: string, containingFile: string): ResolvedModuleWithFailedLookupLocations | undefined;
         getProjectReferences(): (ResolvedProjectReference | undefined)[] | undefined;
     }
     interface ResolvedProjectReference {
         commandLine: ParsedCommandLine;
         sourceFile: SourceFile;
     }
-    enum StructureIsReused {
-        Not = 0,
-        SafeModules = 1,
-        Completely = 2
-    }
     interface CustomTransformers {
         /** Custom transformers to evaluate before built-in .js transformations. */
         before?: TransformerFactory<SourceFile>[];
@@ -2530,7 +1805,7 @@ declare namespace ts {
         sourceMapFile: string;
         sourceMapSourceRoot: string;
         sourceMapSources: string[];
-        sourceMapSourcesContent?: string[];
+        sourceMapSourcesContent?: (string | null)[];
         inputSourceFileNames: string[];
         sourceMapNames?: string[];
         sourceMapMappings: string;
@@ -2547,13 +1822,6 @@ declare namespace ts {
         /** Contains declaration emit diagnostics */
         diagnostics: ReadonlyArray<Diagnostic>;
         emittedFiles?: string[];
-        sourceMaps?: SourceMapData[];
-    }
-    interface TypeCheckerHost {
-        getCompilerOptions(): CompilerOptions;
-        getSourceFiles(): ReadonlyArray<SourceFile>;
-        getSourceFile(fileName: string): SourceFile | undefined;
-        getResolvedTypeReferenceDirectives(): ReadonlyMap<ResolvedTypeReferenceDirective>;
     }
     interface TypeChecker {
         getTypeOfSymbolAtLocation(symbol: Symbol, node: Node): Type;
@@ -2567,16 +1835,10 @@ declare namespace ts {
         getBaseTypeOfLiteralType(type: Type): Type;
         getWidenedType(type: Type): Type;
         getReturnTypeOfSignature(signature: Signature): Type;
-        /**
-         * Gets the type of a parameter at a given position in a signature.
-         * Returns `any` if the index is not valid.
-         */
-        getParameterType(signature: Signature, parameterIndex: number): Type;
         getNullableType(type: Type, flags: TypeFlags): Type;
         getNonNullableType(type: Type): Type;
         /** Note that the resulting nodes cannot be checked. */
         typeToTypeNode(type: Type, enclosingDeclaration?: Node, flags?: NodeBuilderFlags): TypeNode | undefined;
-        typeToTypeNode(type: Type, enclosingDeclaration?: Node, flags?: NodeBuilderFlags, tracker?: SymbolTracker): TypeNode | undefined;
         /** Note that the resulting nodes cannot be checked. */
         signatureToSignatureDeclaration(signature: Signature, kind: SyntaxKind, enclosingDeclaration?: Node, flags?: NodeBuilderFlags): (SignatureDeclaration & {
             typeArguments?: NodeArray<TypeNode>;
@@ -2618,10 +1880,6 @@ declare namespace ts {
         typeToString(type: Type, enclosingDeclaration?: Node, flags?: TypeFormatFlags): string;
         symbolToString(symbol: Symbol, enclosingDeclaration?: Node, meaning?: SymbolFlags, flags?: SymbolFormatFlags): string;
         typePredicateToString(predicate: TypePredicate, enclosingDeclaration?: Node, flags?: TypeFormatFlags): string;
-        writeSignature(signature: Signature, enclosingDeclaration?: Node, flags?: TypeFormatFlags, kind?: SignatureKind, writer?: EmitTextWriter): string;
-        writeType(type: Type, enclosingDeclaration?: Node, flags?: TypeFormatFlags, writer?: EmitTextWriter): string;
-        writeSymbol(symbol: Symbol, enclosingDeclaration?: Node, meaning?: SymbolFlags, flags?: SymbolFormatFlags, writer?: EmitTextWriter): string;
-        writeTypePredicate(predicate: TypePredicate, enclosingDeclaration?: Node, flags?: TypeFormatFlags, writer?: EmitTextWriter): string;
         /**
          * @deprecated Use the createX factory functions or XToY typechecker methods and `createPrinter` or the `xToString` methods instead
          * This will be removed in a future version.
@@ -2631,9 +1889,6 @@ declare namespace ts {
         getAugmentedPropertiesOfType(type: Type): Symbol[];
         getRootSymbols(symbol: Symbol): Symbol[];
         getContextualType(node: Expression): Type | undefined;
-        getContextualTypeForArgumentAtIndex(call: CallLikeExpression, argIndex: number): Type | undefined;
-        getContextualTypeForJsxAttribute(attribute: JsxAttribute | JsxSpreadAttribute): Type | undefined;
-        isContextSensitive(node: Expression | MethodDeclaration | ObjectLiteralElementLike | JsxAttributeLike): boolean;
         /**
          * returns unknownSignature in the case of an error.
          * returns undefined if the node is not valid.
@@ -2645,91 +1900,22 @@ declare namespace ts {
         isUndefinedSymbol(symbol: Symbol): boolean;
         isArgumentsSymbol(symbol: Symbol): boolean;
         isUnknownSymbol(symbol: Symbol): boolean;
-        getMergedSymbol(symbol: Symbol): Symbol;
         getConstantValue(node: EnumMember | PropertyAccessExpression | ElementAccessExpression): string | number | undefined;
         isValidPropertyAccess(node: PropertyAccessExpression | QualifiedName | ImportTypeNode, propertyName: string): boolean;
-        /** Exclude accesses to private properties or methods with a `this` parameter that `type` doesn't satisfy. */
-        isValidPropertyAccessForCompletions(node: PropertyAccessExpression | ImportTypeNode, type: Type, property: Symbol): boolean;
         /** Follow all aliases to get the original symbol. */
         getAliasedSymbol(symbol: Symbol): Symbol;
-        /** Follow a *single* alias to get the immediately aliased symbol. */
-        getImmediateAliasedSymbol(symbol: Symbol): Symbol | undefined;
         getExportsOfModule(moduleSymbol: Symbol): Symbol[];
-        /** Unlike `getExportsOfModule`, this includes properties of an `export =` value. */
-        getExportsAndPropertiesOfModule(moduleSymbol: Symbol): Symbol[];
         getAllAttributesTypeFromJsxOpeningLikeElement(elementNode: JsxOpeningLikeElement): Type | undefined;
         getJsxIntrinsicTagNamesAt(location: Node): Symbol[];
         isOptionalParameter(node: ParameterDeclaration): boolean;
         getAmbientModules(): Symbol[];
         tryGetMemberInModuleExports(memberName: string, moduleSymbol: Symbol): Symbol | undefined;
-        /**
-         * Unlike `tryGetMemberInModuleExports`, this includes properties of an `export =` value.
-         * Does *not* return properties of primitive types.
-         */
-        tryGetMemberInModuleExportsAndProperties(memberName: string, moduleSymbol: Symbol): Symbol | undefined;
         getApparentType(type: Type): Type;
         getSuggestionForNonexistentProperty(node: Identifier, containingType: Type): string | undefined;
         getSuggestionForNonexistentSymbol(location: Node, name: string, meaning: SymbolFlags): string | undefined;
         getSuggestionForNonexistentModule(node: Identifier, target: Symbol): string | undefined;
         getBaseConstraintOfType(type: Type): Type | undefined;
         getDefaultFromTypeParameter(type: Type): Type | undefined;
-        getAnyType(): Type;
-        getStringType(): Type;
-        getNumberType(): Type;
-        getBooleanType(): Type;
-        getFalseType(): Type;
-        getTrueType(): Type;
-        getVoidType(): Type;
-        getUndefinedType(): Type;
-        getNullType(): Type;
-        getESSymbolType(): Type;
-        getNeverType(): Type;
-        getUnionType(types: Type[], subtypeReduction?: UnionReduction): Type;
-        createArrayType(elementType: Type): Type;
-        createPromiseType(type: Type): Type;
-        createAnonymousType(symbol: Symbol, members: SymbolTable, callSignatures: Signature[], constructSignatures: Signature[], stringIndexInfo: IndexInfo | undefined, numberIndexInfo: IndexInfo | undefined): Type;
-        createSignature(declaration: SignatureDeclaration, typeParameters: TypeParameter[] | undefined, thisParameter: Symbol | undefined, parameters: Symbol[], resolvedReturnType: Type, typePredicate: TypePredicate | undefined, minArgumentCount: number, hasRestParameter: boolean, hasLiteralTypes: boolean): Signature;
-        createSymbol(flags: SymbolFlags, name: __String): TransientSymbol;
-        createIndexInfo(type: Type, isReadonly: boolean, declaration?: SignatureDeclaration): IndexInfo;
-        isSymbolAccessible(symbol: Symbol, enclosingDeclaration: Node | undefined, meaning: SymbolFlags, shouldComputeAliasToMarkVisible: boolean): SymbolAccessibilityResult;
-        tryFindAmbientModuleWithoutAugmentations(moduleName: string): Symbol | undefined;
-        getSymbolWalker(accept?: (symbol: Symbol) => boolean): SymbolWalker;
-        getDiagnostics(sourceFile?: SourceFile, cancellationToken?: CancellationToken): Diagnostic[];
-        getGlobalDiagnostics(): Diagnostic[];
-        getEmitResolver(sourceFile?: SourceFile, cancellationToken?: CancellationToken): EmitResolver;
-        getNodeCount(): number;
-        getIdentifierCount(): number;
-        getSymbolCount(): number;
-        getTypeCount(): number;
-        isArrayLikeType(type: Type): boolean;
-        /**
-         * For a union, will include a property if it's defined in *any* of the member types.
-         * So for `{ a } | { b }`, this will include both `a` and `b`.
-         * Does not include properties of primitive types.
-         */
-        getAllPossiblePropertiesOfTypes(type: ReadonlyArray<Type>): Symbol[];
-        resolveName(name: string, location: Node, meaning: SymbolFlags, excludeGlobals: boolean): Symbol | undefined;
-        getJsxNamespace(location?: Node): string;
-        /**
-         * Note that this will return undefined in the following case:
-         *     // a.ts
-         *     export namespace N { export class C { } }
-         *     // b.ts
-         *     <<enclosingDeclaration>>
-         * Where `C` is the symbol we're looking for.
-         * This should be called in a loop climbing parents of the symbol, so we'll get `N`.
-         */
-        getAccessibleSymbolChain(symbol: Symbol, enclosingDeclaration: Node | undefined, meaning: SymbolFlags, useOnlyExternalAliasing: boolean): Symbol[] | undefined;
-        getTypePredicateOfSignature(signature: Signature): TypePredicate;
-        resolveExternalModuleSymbol(symbol: Symbol): Symbol;
-        /** @param node A location where we might consider accessing `this`. Not necessarily a ThisExpression. */
-        tryGetThisTypeAt(node: Node): Type | undefined;
-        getTypeArgumentConstraint(node: TypeNode): Type | undefined;
-        /**
-         * Does *not* get *all* suggestion diagnostics, just the ones that were convenient to report in the checker.
-         * Others are added in computeSuggestionDiagnostics.
-         */
-        getSuggestionDiagnostics(file: SourceFile, cancellationToken?: CancellationToken): ReadonlyArray<DiagnosticWithLocation>;
         /**
          * Depending on the operation performed, it may be appropriate to throw away the checker
          * if the cancellation token is triggered. Typically, if it is used for error checking
@@ -2737,11 +1923,6 @@ declare namespace ts {
          */
         runWithCancellationToken<T>(token: CancellationToken, cb: (checker: TypeChecker) => T): T;
     }
-    enum UnionReduction {
-        None = 0,
-        Literal = 1,
-        Subtype = 2
-    }
     enum NodeBuilderFlags {
         None = 0,
         NoTruncation = 1,
@@ -2802,18 +1983,6 @@ declare namespace ts {
         AllowAnyNodeKind = 4,
         UseAliasDefinedOutsideCurrentScope = 8
     }
-    interface SymbolWalker {
-        /** Note: Return values are not ordered. */
-        walkType(root: Type): {
-            visitedTypes: ReadonlyArray<Type>;
-            visitedSymbols: ReadonlyArray<Symbol>;
-        };
-        /** Note: Return values are not ordered. */
-        walkSymbol(root: Symbol): {
-            visitedTypes: ReadonlyArray<Type>;
-            visitedSymbols: ReadonlyArray<Symbol>;
-        };
-    }
     /**
      * @deprecated
      */
@@ -2847,15 +2016,6 @@ declare namespace ts {
         decreaseIndent(): void;
         clear(): void;
     }
-    enum SymbolAccessibility {
-        Accessible = 0,
-        NotAccessible = 1,
-        CannotBeNamed = 2
-    }
-    enum SyntheticSymbolKind {
-        UnionOrIntersection = 0,
-        Spread = 1
-    }
     enum TypePredicateKind {
         This = 0,
         Identifier = 1
@@ -2873,88 +2033,6 @@ declare namespace ts {
         parameterIndex: number;
     }
     type TypePredicate = IdentifierTypePredicate | ThisTypePredicate;
-    type AnyImportSyntax = ImportDeclaration | ImportEqualsDeclaration;
-    type AnyImportOrReExport = AnyImportSyntax | ExportDeclaration;
-    interface ValidImportTypeNode extends ImportTypeNode {
-        argument: LiteralTypeNode & {
-            literal: StringLiteral;
-        };
-    }
-    type AnyValidImportOrReExport = (ImportDeclaration | ExportDeclaration) & {
-        moduleSpecifier: StringLiteral;
-    } | ImportEqualsDeclaration & {
-        moduleReference: ExternalModuleReference & {
-            expression: StringLiteral;
-        };
-    } | RequireOrImportCall | ValidImportTypeNode;
-    type RequireOrImportCall = CallExpression & {
-        arguments: [StringLiteralLike];
-    };
-    type LateVisibilityPaintedStatement = AnyImportSyntax | VariableStatement | ClassDeclaration | FunctionDeclaration | ModuleDeclaration | TypeAliasDeclaration | InterfaceDeclaration | EnumDeclaration;
-    interface SymbolVisibilityResult {
-        accessibility: SymbolAccessibility;
-        aliasesToMakeVisible?: LateVisibilityPaintedStatement[];
-        errorSymbolName?: string;
-        errorNode?: Node;
-    }
-    interface SymbolAccessibilityResult extends SymbolVisibilityResult {
-        errorModuleName?: string;
-    }
-    interface AllAccessorDeclarations {
-        firstAccessor: AccessorDeclaration;
-        secondAccessor: AccessorDeclaration | undefined;
-        getAccessor: AccessorDeclaration | undefined;
-        setAccessor: AccessorDeclaration | undefined;
-    }
-    /** Indicates how to serialize the name for a TypeReferenceNode when emitting decorator metadata */
-    enum TypeReferenceSerializationKind {
-        Unknown = 0,
-        TypeWithConstructSignatureAndValue = 1,
-        VoidNullableOrNeverType = 2,
-        NumberLikeType = 3,
-        StringLikeType = 4,
-        BooleanType = 5,
-        ArrayLikeType = 6,
-        ESSymbolType = 7,
-        Promise = 8,
-        TypeWithCallSignature = 9,
-        ObjectType = 10
-    }
-    interface EmitResolver {
-        hasGlobalName(name: string): boolean;
-        getReferencedExportContainer(node: Identifier, prefixLocals?: boolean): SourceFile | ModuleDeclaration | EnumDeclaration | undefined;
-        getReferencedImportDeclaration(node: Identifier): Declaration | undefined;
-        getReferencedDeclarationWithCollidingName(node: Identifier): Declaration | undefined;
-        isDeclarationWithCollidingName(node: Declaration): boolean;
-        isValueAliasDeclaration(node: Node): boolean;
-        isReferencedAliasDeclaration(node: Node, checkChildren?: boolean): boolean;
-        isTopLevelValueImportEqualsWithEntityName(node: ImportEqualsDeclaration): boolean;
-        getNodeCheckFlags(node: Node): NodeCheckFlags;
-        isDeclarationVisible(node: Declaration | AnyImportSyntax): boolean;
-        isLateBound(node: Declaration): node is LateBoundDeclaration;
-        collectLinkedAliases(node: Identifier): Node[] | undefined;
-        isImplementationOfOverload(node: FunctionLike): boolean | undefined;
-        isRequiredInitializedParameter(node: ParameterDeclaration): boolean;
-        isOptionalUninitializedParameterProperty(node: ParameterDeclaration): boolean;
-        createTypeOfDeclaration(declaration: AccessorDeclaration | VariableLikeDeclaration, enclosingDeclaration: Node, flags: NodeBuilderFlags, tracker: SymbolTracker, addUndefined?: boolean): TypeNode | undefined;
-        createReturnTypeOfSignatureDeclaration(signatureDeclaration: SignatureDeclaration, enclosingDeclaration: Node, flags: NodeBuilderFlags, tracker: SymbolTracker): TypeNode | undefined;
-        createTypeOfExpression(expr: Expression, enclosingDeclaration: Node, flags: NodeBuilderFlags, tracker: SymbolTracker): TypeNode | undefined;
-        createLiteralConstValue(node: VariableDeclaration | PropertyDeclaration | PropertySignature | ParameterDeclaration): Expression;
-        isSymbolAccessible(symbol: Symbol, enclosingDeclaration: Node | undefined, meaning: SymbolFlags | undefined, shouldComputeAliasToMarkVisible: boolean): SymbolAccessibilityResult;
-        isEntityNameVisible(entityName: EntityNameOrEntityNameExpression, enclosingDeclaration: Node): SymbolVisibilityResult;
-        getConstantValue(node: EnumMember | PropertyAccessExpression | ElementAccessExpression): string | number | undefined;
-        getReferencedValueDeclaration(reference: Identifier): Declaration | undefined;
-        getTypeReferenceSerializationKind(typeName: EntityName, location?: Node): TypeReferenceSerializationKind;
-        isOptionalParameter(node: ParameterDeclaration): boolean;
-        moduleExportsSomeValue(moduleReferenceExpression: Expression): boolean;
-        isArgumentsLocalBinding(node: Identifier): boolean;
-        getExternalModuleFileFromDeclaration(declaration: ImportEqualsDeclaration | ImportDeclaration | ExportDeclaration | ModuleDeclaration | ImportTypeNode): SourceFile | undefined;
-        getTypeReferenceDirectivesForEntityName(name: EntityNameOrEntityNameExpression): string[] | undefined;
-        getTypeReferenceDirectivesForSymbol(symbol: Symbol, meaning?: SymbolFlags): string[] | undefined;
-        isLiteralConstDeclaration(node: VariableDeclaration | PropertyDeclaration | PropertySignature | ParameterDeclaration): boolean;
-        getJsxFactoryEntity(location?: Node): EntityName | undefined;
-        getAllAccessorDeclarations(declaration: AccessorDeclaration): AllAccessorDeclarations;
-    }
     enum SymbolFlags {
         None = 0,
         FunctionScopedVariable = 1,
@@ -2984,7 +2062,6 @@ declare namespace ts {
         Optional = 16777216,
         Transient = 33554432,
         JSContainer = 67108864,
-        All = 67108863,
         Enum = 384,
         Variable = 3,
         Value = 67216319,
@@ -3016,9 +2093,7 @@ declare namespace ts {
         HasMembers = 6240,
         BlockScoped = 418,
         PropertyOrAccessor = 98308,
-        ClassMember = 106500,
-        Classifiable = 2885600,
-        LateBindingContainer = 6240
+        ClassMember = 106500
     }
     interface Symbol {
         flags: SymbolFlags;
@@ -3028,71 +2103,6 @@ declare namespace ts {
         members?: SymbolTable;
         exports?: SymbolTable;
         globalExports?: SymbolTable;
-        id?: number;
-        mergeId?: number;
-        parent?: Symbol;
-        exportSymbol?: Symbol;
-        nameType?: Type;
-        constEnumOnlyModule?: boolean;
-        isReferenced?: SymbolFlags;
-        isReplaceableByMethod?: boolean;
-        isAssigned?: boolean;
-    }
-    interface SymbolLinks {
-        immediateTarget?: Symbol;
-        target?: Symbol;
-        type?: Type;
-        uniqueESSymbolType?: Type;
-        declaredType?: Type;
-        typeParameters?: TypeParameter[];
-        outerTypeParameters?: TypeParameter[];
-        inferredClassType?: Type;
-        instantiations?: Map<Type>;
-        mapper?: TypeMapper;
-        referenced?: boolean;
-        containingType?: UnionOrIntersectionType;
-        leftSpread?: Symbol;
-        rightSpread?: Symbol;
-        syntheticOrigin?: Symbol;
-        isDiscriminantProperty?: boolean;
-        resolvedExports?: SymbolTable;
-        resolvedMembers?: SymbolTable;
-        exportsChecked?: boolean;
-        typeParametersChecked?: boolean;
-        isDeclarationWithCollidingName?: boolean;
-        bindingElement?: BindingElement;
-        exportsSomeValue?: boolean;
-        enumKind?: EnumKind;
-        originatingImport?: ImportDeclaration | ImportCall;
-        lateSymbol?: Symbol;
-    }
-    enum EnumKind {
-        Numeric = 0,
-        Literal = 1
-    }
-    enum CheckFlags {
-        Instantiated = 1,
-        SyntheticProperty = 2,
-        SyntheticMethod = 4,
-        Readonly = 8,
-        Partial = 16,
-        HasNonUniformType = 32,
-        ContainsPublic = 64,
-        ContainsProtected = 128,
-        ContainsPrivate = 256,
-        ContainsStatic = 512,
-        Late = 1024,
-        ReverseMapped = 2048,
-        OptionalParameter = 4096,
-        RestParameter = 8192,
-        Synthetic = 6
-    }
-    interface TransientSymbol extends Symbol, SymbolLinks {
-        checkFlags: CheckFlags;
-    }
-    interface ReverseMappedSymbol extends TransientSymbol {
-        propertyType: Type;
-        mappedType: MappedType;
     }
     enum InternalSymbolName {
         Call = "__call",
@@ -3143,53 +2153,6 @@ declare namespace ts {
     }
     /** SymbolTable based on ES6 Map interface. */
     type SymbolTable = UnderscoreEscapedMap<Symbol>;
-    /** Used to track a `declare module "foo*"`-like declaration. */
-    interface PatternAmbientModule {
-        pattern: Pattern;
-        symbol: Symbol;
-    }
-    enum NodeCheckFlags {
-        TypeChecked = 1,
-        LexicalThis = 2,
-        CaptureThis = 4,
-        CaptureNewTarget = 8,
-        SuperInstance = 256,
-        SuperStatic = 512,
-        ContextChecked = 1024,
-        AsyncMethodWithSuper = 2048,
-        AsyncMethodWithSuperBinding = 4096,
-        CaptureArguments = 8192,
-        EnumValuesComputed = 16384,
-        LexicalModuleMergesWithClass = 32768,
-        LoopWithCapturedBlockScopedBinding = 65536,
-        CapturedBlockScopedBinding = 131072,
-        BlockScopedBindingInLoop = 262144,
-        ClassWithBodyScopedClassBinding = 524288,
-        BodyScopedClassBinding = 1048576,
-        NeedsLoopOutParameter = 2097152,
-        AssignmentsMarked = 4194304,
-        ClassWithConstructorReference = 8388608,
-        ConstructorReferenceInClass = 16777216
-    }
-    interface NodeLinks {
-        flags: NodeCheckFlags;
-        resolvedType?: Type;
-        resolvedSignature?: Signature;
-        resolvedSignatures?: Map<Signature[]>;
-        resolvedSymbol?: Symbol;
-        resolvedIndexInfo?: IndexInfo;
-        maybeTypePredicate?: boolean;
-        enumMemberValue?: string | number;
-        isVisible?: boolean;
-        containsArgumentsReference?: boolean;
-        hasReportedStatementInAmbientContext?: boolean;
-        jsxFlags: JsxFlags;
-        resolvedJsxElementAttributesType?: Type;
-        resolvedJsxElementAllAttributesType?: Type;
-        hasSuperCall?: boolean;
-        superCall?: SuperCall;
-        switchTypes?: Type[];
-    }
     enum TypeFlags {
         Any = 1,
         Unknown = 2,
@@ -3216,28 +2179,16 @@ declare namespace ts {
         Conditional = 4194304,
         Substitution = 8388608,
         NonPrimitive = 16777216,
-        FreshLiteral = 33554432,
-        UnionOfUnitTypes = 67108864,
-        ContainsWideningType = 134217728,
-        ContainsObjectLiteral = 268435456,
-        ContainsAnyFunctionType = 536870912,
-        AnyOrUnknown = 3,
-        Nullable = 24576,
         Literal = 448,
         Unit = 27072,
         StringOrNumberLiteral = 192,
-        StringOrNumberLiteralOrUnique = 2240,
-        DefinitelyFalsy = 29120,
         PossiblyFalsy = 29148,
-        Intrinsic = 16839967,
-        Primitive = 32764,
         StringLike = 68,
         NumberLike = 168,
         BooleanLike = 272,
         EnumLike = 544,
         ESSymbolLike = 3072,
         VoidLike = 12288,
-        DisjointDomains = 16809468,
         UnionOrIntersection = 786432,
         StructuredType = 917504,
         TypeVariable = 2162688,
@@ -3246,29 +2197,15 @@ declare namespace ts {
         Instantiable = 15794176,
         StructuredOrInstantiable = 16711680,
         Narrowable = 33492479,
-        NotUnionOrUnit = 16909315,
-        NotUnit = 16749629,
-        RequiresWidening = 402653184,
-        PropagatingFlags = 939524096,
-        NonWideningType = 134217728,
-        Wildcard = 268435456,
-        EmptyObject = 536870912,
-        ConstructionFlags = 939524096,
-        GenericMappedType = 134217728
+        NotUnionOrUnit = 16909315
     }
     type DestructuringPattern = BindingPattern | ObjectLiteralExpression | ArrayLiteralExpression;
     interface Type {
         flags: TypeFlags;
-        id: number;
-        checker: TypeChecker;
         symbol: Symbol;
         pattern?: DestructuringPattern;
         aliasSymbol?: Symbol;
         aliasTypeArguments?: Type[];
-        wildcardInstantiation?: Type;
-    }
-    interface IntrinsicType extends Type {
-        intrinsicName: string;
     }
     interface LiteralType extends Type {
         value: string | number;
@@ -3312,8 +2249,6 @@ declare namespace ts {
         outerTypeParameters: TypeParameter[] | undefined;
         localTypeParameters: TypeParameter[] | undefined;
         thisType: TypeParameter | undefined;
-        resolvedBaseConstructorType?: Type;
-        resolvedBaseTypes: BaseType[];
     }
     type BaseType = ObjectType | IntersectionType;
     interface InterfaceTypeWithDeclaredMembers extends InterfaceType {
@@ -3337,93 +2272,28 @@ declare namespace ts {
         target: GenericType;
         typeArguments?: Type[];
     }
-    enum Variance {
-        Invariant = 0,
-        Covariant = 1,
-        Contravariant = 2,
-        Bivariant = 3,
-        Independent = 4
-    }
     interface GenericType extends InterfaceType, TypeReference {
-        instantiations: Map<TypeReference>;
-        variances?: Variance[];
     }
     interface TupleType extends GenericType {
         minLength: number;
+        hasRestElement: boolean;
         associatedNames?: __String[];
     }
     interface UnionOrIntersectionType extends Type {
         types: Type[];
-        propertyCache: SymbolTable;
-        resolvedProperties: Symbol[];
-        resolvedIndexType: IndexType;
-        resolvedStringIndexType: IndexType;
-        resolvedBaseConstraint: Type;
-        couldContainTypeVariables: boolean;
     }
     interface UnionType extends UnionOrIntersectionType {
     }
     interface IntersectionType extends UnionOrIntersectionType {
-        resolvedApparentType: Type;
     }
     type StructuredType = ObjectType | UnionType | IntersectionType;
-    interface AnonymousType extends ObjectType {
-        target?: AnonymousType;
-        mapper?: TypeMapper;
-    }
-    interface MappedType extends AnonymousType {
-        declaration: MappedTypeNode;
-        typeParameter?: TypeParameter;
-        constraintType?: Type;
-        templateType?: Type;
-        modifiersType?: Type;
-    }
     interface EvolvingArrayType extends ObjectType {
         elementType: Type;
         finalArrayType?: Type;
     }
-    interface ReverseMappedType extends ObjectType {
-        source: Type;
-        mappedType: MappedType;
-    }
-    interface ResolvedType extends ObjectType, UnionOrIntersectionType {
-        members: SymbolTable;
-        properties: Symbol[];
-        callSignatures: Signature[];
-        constructSignatures: Signature[];
-        stringIndexInfo?: IndexInfo;
-        numberIndexInfo?: IndexInfo;
-    }
-    interface FreshObjectLiteralType extends ResolvedType {
-        regularType: ResolvedType;
-    }
-    interface IterableOrIteratorType extends ObjectType, UnionType {
-        iteratedTypeOfIterable?: Type;
-        iteratedTypeOfIterator?: Type;
-        iteratedTypeOfAsyncIterable?: Type;
-        iteratedTypeOfAsyncIterator?: Type;
-    }
-    interface PromiseOrAwaitableType extends ObjectType, UnionType {
-        promiseTypeOfPromiseConstructor?: Type;
-        promisedTypeOfPromise?: Type;
-        awaitedTypeOfType?: Type;
-    }
-    interface SyntheticDefaultModuleType extends Type {
-        syntheticType?: Type;
-    }
     interface InstantiableType extends Type {
-        resolvedBaseConstraint?: Type;
-        resolvedIndexType?: IndexType;
-        resolvedStringIndexType?: IndexType;
     }
     interface TypeParameter extends InstantiableType {
-        /** Retrieve using getConstraintFromTypeParameter */
-        constraint?: Type;
-        default?: Type;
-        target?: TypeParameter;
-        mapper?: TypeMapper;
-        isThisType?: boolean;
-        resolvedDefaultType?: Type;
     }
     interface IndexedAccessType extends InstantiableType {
         objectType: Type;
@@ -3434,7 +2304,6 @@ declare namespace ts {
     type TypeVariable = TypeParameter | IndexedAccessType;
     interface IndexType extends InstantiableType {
         type: InstantiableType | UnionOrIntersectionType;
-        stringsOnly: boolean;
     }
     interface ConditionalRoot {
         node: ConditionalTypeNode;
@@ -3455,9 +2324,6 @@ declare namespace ts {
         extendsType: Type;
         resolvedTrueType?: Type;
         resolvedFalseType?: Type;
-        resolvedDefaultConstraint?: Type;
-        mapper?: TypeMapper;
-        combinedMapper?: TypeMapper;
     }
     interface SubstitutionType extends InstantiableType {
         typeVariable: TypeVariable;
@@ -3471,19 +2337,6 @@ declare namespace ts {
         declaration?: SignatureDeclaration | JSDocSignature;
         typeParameters?: TypeParameter[];
         parameters: Symbol[];
-        thisParameter?: Symbol;
-        resolvedReturnType?: Type;
-        resolvedTypePredicate?: TypePredicate;
-        minArgumentCount: number;
-        hasRestParameter: boolean;
-        hasLiteralTypes: boolean;
-        target?: Signature;
-        mapper?: TypeMapper;
-        unionSignatures?: Signature[];
-        erasedSignatureCache?: Signature;
-        canonicalSignatureCache?: Signature;
-        isolatedSignatureType?: ObjectType;
-        instantiations?: Map<Signature>;
     }
     enum IndexKind {
         String = 0,
@@ -3494,7 +2347,6 @@ declare namespace ts {
         isReadonly: boolean;
         declaration?: IndexSignatureDeclaration;
     }
-    type TypeMapper = (t: TypeParameter) => Type;
     enum InferencePriority {
         NakedTypeVariable = 1,
         HomomorphicMappedType = 2,
@@ -3505,58 +2357,6 @@ declare namespace ts {
         AlwaysStrict = 64,
         PriorityImpliesCombination = 28
     }
-    interface InferenceInfo {
-        typeParameter: TypeParameter;
-        candidates: Type[] | undefined;
-        contraCandidates: Type[] | undefined;
-        inferredType?: Type;
-        priority?: InferencePriority;
-        topLevel: boolean;
-        isFixed: boolean;
-    }
-    enum InferenceFlags {
-        None = 0,
-        InferUnionTypes = 1,
-        NoDefault = 2,
-        AnyDefault = 4
-    }
-    /**
-     * Ternary values are defined such that
-     * x & y is False if either x or y is False.
-     * x & y is Maybe if either x or y is Maybe, but neither x or y is False.
-     * x & y is True if both x and y are True.
-     * x | y is False if both x and y are False.
-     * x | y is Maybe if either x or y is Maybe, but neither x or y is True.
-     * x | y is True if either x or y is True.
-     */
-    enum Ternary {
-        False = 0,
-        Maybe = 1,
-        True = -1
-    }
-    type TypeComparer = (s: Type, t: Type, reportErrors?: boolean) => Ternary;
-    interface InferenceContext extends TypeMapper {
-        typeParameters: TypeParameter[];
-        signature?: Signature;
-        inferences: InferenceInfo[];
-        flags: InferenceFlags;
-        compareTypes: TypeComparer;
-    }
-    interface WideningContext {
-        parent?: WideningContext;
-        propertyName?: __String;
-        siblings?: Type[];
-        resolvedProperties?: Symbol[];
-    }
-    enum SpecialPropertyAssignmentKind {
-        None = 0,
-        ExportsProperty = 1,
-        ModuleExports = 2,
-        PrototypeProperty = 3,
-        ThisProperty = 4,
-        Property = 5,
-        Prototype = 6
-    }
     /** @deprecated Use FileExtensionInfo instead. */
     type JsFileExtensionInfo = FileExtensionInfo;
     interface FileExtensionInfo {
@@ -3583,16 +2383,19 @@ declare namespace ts {
         code: number;
         next?: DiagnosticMessageChain;
     }
-    interface Diagnostic {
-        file: SourceFile | undefined;
-        start: number | undefined;
-        length: number | undefined;
-        messageText: string | DiagnosticMessageChain;
+    interface Diagnostic extends DiagnosticRelatedInformation {
         category: DiagnosticCategory;
         /** May store more in future. For now, this will simply be `true` to indicate when a diagnostic is an unused-identifier diagnostic. */
         reportsUnnecessary?: {};
         code: number;
         source?: string;
+        relatedInformation?: DiagnosticRelatedInformation[];
+    }
+    interface DiagnosticRelatedInformation {
+        file: SourceFile | undefined;
+        start: number | undefined;
+        length: number | undefined;
+        messageText: string | DiagnosticMessageChain;
     }
     interface DiagnosticWithLocation extends Diagnostic {
         file: SourceFile;
@@ -3605,9 +2408,6 @@ declare namespace ts {
         Suggestion = 2,
         Message = 3
     }
-    function diagnosticCategoryName(d: {
-        category: DiagnosticCategory;
-    }, lowerCase?: boolean): string;
     enum ModuleResolutionKind {
         Classic = 1,
         NodeJs = 2
@@ -3627,44 +2427,31 @@ declare namespace ts {
     }
     type CompilerOptionsValue = string | number | boolean | (string | number)[] | string[] | MapLike<string[]> | PluginImport[] | ProjectReference[] | null | undefined;
     interface CompilerOptions {
-        all?: boolean;
         allowJs?: boolean;
-        allowNonTsExtensions?: boolean;
         allowSyntheticDefaultImports?: boolean;
         allowUnreachableCode?: boolean;
         allowUnusedLabels?: boolean;
         alwaysStrict?: boolean;
         baseUrl?: string;
-        /** An error if set - this should only go through the -b pipeline and not actually be observed */
-        build?: boolean;
         charset?: string;
         checkJs?: boolean;
-        configFilePath?: string;
-        /** configFile is set as non enumerable property so as to avoid checking of json source files */
-        readonly configFile?: TsConfigSourceFile;
         declaration?: boolean;
         declarationMap?: boolean;
         emitDeclarationOnly?: boolean;
         declarationDir?: string;
-        diagnostics?: boolean;
-        extendedDiagnostics?: boolean;
         disableSizeLimit?: boolean;
         downlevelIteration?: boolean;
         emitBOM?: boolean;
         emitDecoratorMetadata?: boolean;
         experimentalDecorators?: boolean;
         forceConsistentCasingInFileNames?: boolean;
-        help?: boolean;
         importHelpers?: boolean;
-        init?: boolean;
         inlineSourceMap?: boolean;
         inlineSources?: boolean;
         isolatedModules?: boolean;
         jsx?: JsxEmit;
         keyofStringsOnly?: boolean;
         lib?: string[];
-        listEmittedFiles?: boolean;
-        listFiles?: boolean;
         locale?: string;
         mapRoot?: string;
         maxNodeModuleJsDepth?: number;
@@ -3672,7 +2459,6 @@ declare namespace ts {
         moduleResolution?: ModuleResolutionKind;
         newLine?: NewLineKind;
         noEmit?: boolean;
-        noEmitForJsFiles?: boolean;
         noEmitHelpers?: boolean;
         noEmitOnError?: boolean;
         noErrorTruncation?: boolean;
@@ -3690,12 +2476,9 @@ declare namespace ts {
         outDir?: string;
         outFile?: string;
         paths?: MapLike<string[]>;
-        plugins?: PluginImport[];
         preserveConstEnums?: boolean;
         preserveSymlinks?: boolean;
-        preserveWatchOutput?: boolean;
         project?: string;
-        pretty?: boolean;
         reactNamespace?: string;
         jsxFactory?: string;
         composite?: boolean;
@@ -3710,18 +2493,14 @@ declare namespace ts {
         strictFunctionTypes?: boolean;
         strictNullChecks?: boolean;
         strictPropertyInitialization?: boolean;
-        stripInternal?: boolean;
         suppressExcessPropertyErrors?: boolean;
         suppressImplicitAnyIndexErrors?: boolean;
-        suppressOutputPathCheck?: boolean;
         target?: ScriptTarget;
         traceResolution?: boolean;
         resolveJsonModule?: boolean;
         types?: string[];
         /** Paths used to compute primary types search locations */
         typeRoots?: string[];
-        version?: boolean;
-        watch?: boolean;
         esModuleInterop?: boolean;
         [option: string]: CompilerOptionsValue | TsConfigSourceFile | undefined;
     }
@@ -3795,32 +2574,15 @@ declare namespace ts {
         errors: Diagnostic[];
         wildcardDirectories?: MapLike<WatchDirectoryFlags>;
         compileOnSave?: boolean;
-        configFileSpecs?: ConfigFileSpecs;
     }
     enum WatchDirectoryFlags {
         None = 0,
         Recursive = 1
     }
-    interface ConfigFileSpecs {
-        filesSpecs: ReadonlyArray<string> | undefined;
-        referencesSpecs: ReadonlyArray<ProjectReference> | undefined;
-        /**
-         * Present to report errors (user specified specs), validatedIncludeSpecs are used for file name matching
-         */
-        includeSpecs?: ReadonlyArray<string>;
-        /**
-         * Present to report errors (user specified specs), validatedExcludeSpecs are used for file name matching
-         */
-        excludeSpecs?: ReadonlyArray<string>;
-        validatedIncludeSpecs?: ReadonlyArray<string>;
-        validatedExcludeSpecs?: ReadonlyArray<string>;
-        wildcardDirectories: MapLike<WatchDirectoryFlags>;
-    }
     interface ExpandResult {
         fileNames: string[];
         projectReferences: ReadonlyArray<ProjectReference> | undefined;
         wildcardDirectories: MapLike<WatchDirectoryFlags>;
-        spec: ConfigFileSpecs;
     }
     interface CreateProgramOptions {
         rootNames: ReadonlyArray<string>;
@@ -3830,160 +2592,6 @@ declare namespace ts {
         oldProgram?: Program;
         configFileParsingDiagnostics?: ReadonlyArray<Diagnostic>;
     }
-    interface CommandLineOptionBase {
-        name: string;
-        type: "string" | "number" | "boolean" | "object" | "list" | Map<number | string>;
-        isFilePath?: boolean;
-        shortName?: string;
-        description?: DiagnosticMessage;
-        paramType?: DiagnosticMessage;
-        isTSConfigOnly?: boolean;
-        isCommandLineOnly?: boolean;
-        showInSimplifiedHelpView?: boolean;
-        category?: DiagnosticMessage;
-    }
-    interface CommandLineOptionOfPrimitiveType extends CommandLineOptionBase {
-        type: "string" | "number" | "boolean";
-    }
-    interface CommandLineOptionOfCustomType extends CommandLineOptionBase {
-        type: Map<number | string>;
-    }
-    interface TsConfigOnlyOption extends CommandLineOptionBase {
-        type: "object";
-        elementOptions?: Map<CommandLineOption>;
-        extraKeyDiagnosticMessage?: DiagnosticMessage;
-    }
-    interface CommandLineOptionOfListType extends CommandLineOptionBase {
-        type: "list";
-        element: CommandLineOptionOfCustomType | CommandLineOptionOfPrimitiveType | TsConfigOnlyOption;
-    }
-    type CommandLineOption = CommandLineOptionOfCustomType | CommandLineOptionOfPrimitiveType | TsConfigOnlyOption | CommandLineOptionOfListType;
-    enum CharacterCodes {
-        nullCharacter = 0,
-        maxAsciiCharacter = 127,
-        lineFeed = 10,
-        carriageReturn = 13,
-        lineSeparator = 8232,
-        paragraphSeparator = 8233,
-        nextLine = 133,
-        space = 32,
-        nonBreakingSpace = 160,
-        enQuad = 8192,
-        emQuad = 8193,
-        enSpace = 8194,
-        emSpace = 8195,
-        threePerEmSpace = 8196,
-        fourPerEmSpace = 8197,
-        sixPerEmSpace = 8198,
-        figureSpace = 8199,
-        punctuationSpace = 8200,
-        thinSpace = 8201,
-        hairSpace = 8202,
-        zeroWidthSpace = 8203,
-        narrowNoBreakSpace = 8239,
-        ideographicSpace = 12288,
-        mathematicalSpace = 8287,
-        ogham = 5760,
-        _ = 95,
-        $ = 36,
-        _0 = 48,
-        _1 = 49,
-        _2 = 50,
-        _3 = 51,
-        _4 = 52,
-        _5 = 53,
-        _6 = 54,
-        _7 = 55,
-        _8 = 56,
-        _9 = 57,
-        a = 97,
-        b = 98,
-        c = 99,
-        d = 100,
-        e = 101,
-        f = 102,
-        g = 103,
-        h = 104,
-        i = 105,
-        j = 106,
-        k = 107,
-        l = 108,
-        m = 109,
-        n = 110,
-        o = 111,
-        p = 112,
-        q = 113,
-        r = 114,
-        s = 115,
-        t = 116,
-        u = 117,
-        v = 118,
-        w = 119,
-        x = 120,
-        y = 121,
-        z = 122,
-        A = 65,
-        B = 66,
-        C = 67,
-        D = 68,
-        E = 69,
-        F = 70,
-        G = 71,
-        H = 72,
-        I = 73,
-        J = 74,
-        K = 75,
-        L = 76,
-        M = 77,
-        N = 78,
-        O = 79,
-        P = 80,
-        Q = 81,
-        R = 82,
-        S = 83,
-        T = 84,
-        U = 85,
-        V = 86,
-        W = 87,
-        X = 88,
-        Y = 89,
-        Z = 90,
-        ampersand = 38,
-        asterisk = 42,
-        at = 64,
-        backslash = 92,
-        backtick = 96,
-        bar = 124,
-        caret = 94,
-        closeBrace = 125,
-        closeBracket = 93,
-        closeParen = 41,
-        colon = 58,
-        comma = 44,
-        dot = 46,
-        doubleQuote = 34,
-        equals = 61,
-        exclamation = 33,
-        greaterThan = 62,
-        hash = 35,
-        lessThan = 60,
-        minus = 45,
-        openBrace = 123,
-        openBracket = 91,
-        openParen = 40,
-        percent = 37,
-        plus = 43,
-        question = 63,
-        semicolon = 59,
-        singleQuote = 39,
-        slash = 47,
-        tilde = 126,
-        backspace = 8,
-        formFeed = 12,
-        byteOrderMark = 65279,
-        tab = 9,
-        verticalTab = 11
-    }
     interface ModuleResolutionHost {
         fileExists(fileName: string): boolean;
         readFile(fileName: string): string | undefined;
@@ -4016,7 +2624,6 @@ declare namespace ts {
      * If changing this, remember to change `moduleResolutionIsEqualTo`.
      */
     interface ResolvedModuleFull extends ResolvedModule {
-        readonly originalPath?: string;
         /**
          * Extension of resolvedFileName. This must match what's at the end of resolvedFileName.
          * This is optional for backwards-compatibility, but will be added if not provided.
@@ -4053,7 +2660,6 @@ declare namespace ts {
     }
     interface ResolvedModuleWithFailedLookupLocations {
         readonly resolvedModule: ResolvedModuleFull | undefined;
-        readonly failedLookupLocations: ReadonlyArray<string>;
     }
     interface ResolvedTypeReferenceDirective {
         primary: boolean;
@@ -4064,7 +2670,6 @@ declare namespace ts {
         readonly resolvedTypeReferenceDirective: ResolvedTypeReferenceDirective | undefined;
         readonly failedLookupLocations: ReadonlyArray<string>;
     }
-    type HasInvalidatedResolution = (sourceFile: Path) => boolean;
     interface CompilerHost extends ModuleResolutionHost {
         getSourceFile(fileName: string, languageVersion: ScriptTarget, onError?: (message: string) => void, shouldCreateNewSourceFile?: boolean): SourceFile | undefined;
         getSourceFileByPath?(fileName: string, path: Path, languageVersion: ScriptTarget, onError?: (message: string) => void, shouldCreateNewSourceFile?: boolean): SourceFile | undefined;
@@ -4084,97 +2689,19 @@ declare namespace ts {
          */
         resolveTypeReferenceDirectives?(typeReferenceDirectiveNames: string[], containingFile: string): ResolvedTypeReferenceDirective[];
         getEnvironmentVariable?(name: string): string | undefined;
-        onReleaseOldSourceFile?(oldSourceFile: SourceFile, oldOptions: CompilerOptions): void;
-        hasInvalidatedResolution?: HasInvalidatedResolution;
-        hasChangedAutomaticTypeDirectiveNames?: boolean;
         createHash?(data: string): string;
         getModifiedTime?(fileName: string): Date;
         setModifiedTime?(fileName: string, date: Date): void;
         deleteFile?(fileName: string): void;
     }
-    enum TransformFlags {
-        None = 0,
-        TypeScript = 1,
-        ContainsTypeScript = 2,
-        ContainsJsx = 4,
-        ContainsESNext = 8,
-        ContainsES2017 = 16,
-        ContainsES2016 = 32,
-        ES2015 = 64,
-        ContainsES2015 = 128,
-        Generator = 256,
-        ContainsGenerator = 512,
-        DestructuringAssignment = 1024,
-        ContainsDestructuringAssignment = 2048,
-        ContainsDecorators = 4096,
-        ContainsPropertyInitializer = 8192,
-        ContainsLexicalThis = 16384,
-        ContainsCapturedLexicalThis = 32768,
-        ContainsLexicalThisInComputedPropertyName = 65536,
-        ContainsDefaultValueAssignments = 131072,
-        ContainsParameterPropertyAssignments = 262144,
-        ContainsSpread = 524288,
-        ContainsObjectSpread = 1048576,
-        ContainsRest = 524288,
-        ContainsObjectRest = 1048576,
-        ContainsComputedPropertyName = 2097152,
-        ContainsBlockScopedBinding = 4194304,
-        ContainsBindingPattern = 8388608,
-        ContainsYield = 16777216,
-        ContainsHoistedDeclarationOrCompletion = 33554432,
-        ContainsDynamicImport = 67108864,
-        Super = 134217728,
-        ContainsSuper = 268435456,
-        HasComputedFlags = 536870912,
-        AssertTypeScript = 3,
-        AssertJsx = 4,
-        AssertESNext = 8,
-        AssertES2017 = 16,
-        AssertES2016 = 32,
-        AssertES2015 = 192,
-        AssertGenerator = 768,
-        AssertDestructuringAssignment = 3072,
-        OuterExpressionExcludes = 536872257,
-        PropertyAccessExcludes = 671089985,
-        NodeExcludes = 939525441,
-        ArrowFunctionExcludes = 1003902273,
-        FunctionExcludes = 1003935041,
-        ConstructorExcludes = 1003668801,
-        MethodOrAccessorExcludes = 1003668801,
-        ClassExcludes = 942011713,
-        ModuleExcludes = 977327425,
-        TypeExcludes = -3,
-        ObjectLiteralExcludes = 942740801,
-        ArrayLiteralOrCallOrNewExcludes = 940049729,
-        VariableDeclarationListExcludes = 948962625,
-        ParameterExcludes = 939525441,
-        CatchClauseExcludes = 940574017,
-        BindingPatternExcludes = 940049729,
-        TypeScriptClassSyntaxMask = 274432,
-        ES2015FunctionSyntaxMask = 163840
-    }
     interface SourceMapRange extends TextRange {
         source?: SourceMapSource;
     }
     interface SourceMapSource {
         fileName: string;
         text: string;
-        lineMap: ReadonlyArray<number>;
         skipTrivia?: (pos: number) => number;
     }
-    interface EmitNode {
-        annotatedNodes?: Node[];
-        flags: EmitFlags;
-        leadingComments?: SynthesizedComment[];
-        trailingComments?: SynthesizedComment[];
-        commentRange?: TextRange;
-        sourceMapRange?: SourceMapRange;
-        tokenSourceMapRanges?: (SourceMapRange | undefined)[];
-        constantValue?: string | number;
-        externalHelpersModuleName?: Identifier;
-        helpers?: EmitHelper[];
-        startsOnNewLine?: boolean;
-    }
     enum EmitFlags {
         None = 0,
         SingleLine = 1,
@@ -4204,9 +2731,7 @@ declare namespace ts {
         NoHoisting = 2097152,
         HasEndOfDeclarationMarker = 4194304,
         Iterator = 8388608,
-        NoAsciiEscaping = 16777216,
-        TypeScriptClassWrapper = 33554432,
-        NeverApplyImportHelper = 67108864
+        NoAsciiEscaping = 16777216
     }
     interface EmitHelper {
         readonly name: string;
@@ -4214,38 +2739,7 @@ declare namespace ts {
         readonly text: string | ((node: EmitHelperUniqueNameCallback) => string);
         readonly priority?: number;
     }
-    type UniqueNameHandler = (baseName: string, checkFn?: (name: string) => boolean, optimistic?: boolean) => string;
     type EmitHelperUniqueNameCallback = (name: string) => string;
-    /**
-     * Used by the checker, this enum keeps track of external emit helpers that should be type
-     * checked.
-     */
-    enum ExternalEmitHelpers {
-        Extends = 1,
-        Assign = 2,
-        Rest = 4,
-        Decorate = 8,
-        Metadata = 16,
-        Param = 32,
-        Awaiter = 64,
-        Generator = 128,
-        Values = 256,
-        Read = 512,
-        Spread = 1024,
-        Await = 2048,
-        AsyncGenerator = 4096,
-        AsyncDelegator = 8192,
-        AsyncValues = 16384,
-        ExportStar = 32768,
-        MakeTemplateObject = 65536,
-        FirstEmitHelper = 1,
-        LastEmitHelper = 65536,
-        ForOfIncludes = 256,
-        ForAwaitOfIncludes = 16384,
-        AsyncGeneratorIncludes = 6144,
-        AsyncDelegatorIncludes = 26624,
-        SpreadIncludes = 1536
-    }
     enum EmitHint {
         SourceFile = 0,
         Expression = 1,
@@ -4253,20 +2747,7 @@ declare namespace ts {
         MappedTypeParameter = 3,
         Unspecified = 4
     }
-    interface EmitHost extends ScriptReferenceHost, ModuleSpecifierResolutionHost {
-        getSourceFiles(): ReadonlyArray<SourceFile>;
-        getCurrentDirectory(): string;
-        isSourceFileFromExternalLibrary(file: SourceFile): boolean;
-        getCommonSourceDirectory(): string;
-        getCanonicalFileName(fileName: string): string;
-        getNewLine(): string;
-        isEmitBlocked(emitFileName: string): boolean;
-        getPrependNodes(): ReadonlyArray<InputFiles>;
-        writeFile: WriteFileCallback;
-    }
     interface TransformationContext {
-        getEmitResolver(): EmitResolver;
-        getEmitHost(): EmitHost;
         /** Gets the compiler options supplied to the transformer. */
         getCompilerOptions(): CompilerOptions;
         /** Starts a new lexical environment. */
@@ -4315,7 +2796,6 @@ declare namespace ts {
          * before returning the `NodeTransformer` callback.
          */
         onEmitNode: (hint: EmitHint, node: Node, emitCallback: (hint: EmitHint, node: Node) => void) => void;
-        addDiagnostic(diag: DiagnosticWithLocation): void;
     }
     interface TransformationResult<T extends Node> {
         /** Gets the transformed source files. */
@@ -4383,20 +2863,6 @@ declare namespace ts {
          * Prints a bundle of source files as-is, without any emit transformations.
          */
         printBundle(bundle: Bundle): string;
-        writeNode(hint: EmitHint, node: Node, sourceFile: SourceFile | undefined, writer: EmitTextWriter): void;
-        writeList<T extends Node>(format: ListFormat, list: NodeArray<T> | undefined, sourceFile: SourceFile | undefined, writer: EmitTextWriter): void;
-        writeFile(sourceFile: SourceFile, writer: EmitTextWriter): void;
-        writeBundle(bundle: Bundle, writer: EmitTextWriter, info?: BundleInfo): void;
-    }
-    /**
-     * When a bundle contains prepended content, we store a file on disk indicating where the non-prepended
-     * content of that file starts. On a subsequent build where there are no upstream .d.ts changes, we
-     * read the bundle info file and the original .js file to quickly re-use portion of the file
-     * that didn't originate in prepended content.
-     */
-    interface BundleInfo {
-        originalOffset: number;
-        totalLength: number;
     }
     interface PrintHandlers {
         /**
@@ -4440,57 +2906,23 @@ declare namespace ts {
          * ```
          */
         substituteNode?(hint: EmitHint, node: Node): Node;
-        onEmitSourceMapOfNode?: (hint: EmitHint, node: Node, emitCallback: (hint: EmitHint, node: Node) => void) => void;
-        onEmitSourceMapOfToken?: (node: Node | undefined, token: SyntaxKind, writer: (s: string) => void, pos: number, emitCallback: (token: SyntaxKind, writer: (s: string) => void, pos: number) => number) => number;
-        onEmitSourceMapOfPosition?: (pos: number) => void;
-        onSetSourceFile?: (node: SourceFile) => void;
-        onBeforeEmitNodeArray?: (nodes: NodeArray<any> | undefined) => void;
-        onAfterEmitNodeArray?: (nodes: NodeArray<any> | undefined) => void;
-        onBeforeEmitToken?: (node: Node) => void;
-        onAfterEmitToken?: (node: Node) => void;
     }
     interface PrinterOptions {
         removeComments?: boolean;
         newLine?: NewLineKind;
         omitTrailingSemicolon?: boolean;
         noEmitHelpers?: boolean;
-        module?: CompilerOptions["module"];
-        target?: CompilerOptions["target"];
-        sourceMap?: boolean;
-        inlineSourceMap?: boolean;
-        extendedDiagnostics?: boolean;
-        onlyPrintJsDocStyle?: boolean;
-    }
-    interface EmitTextWriter extends SymbolWriter {
-        write(s: string): void;
-        writeTextOfNode(text: string, node: Node): void;
-        getText(): string;
-        rawWrite(s: string): void;
-        writeLiteral(s: string): void;
-        getTextPos(): number;
-        getLine(): number;
-        getColumn(): number;
-        getIndent(): number;
-        isAtStartOfLine(): boolean;
     }
     interface GetEffectiveTypeRootsHost {
         directoryExists?(directoryName: string): boolean;
         getCurrentDirectory?(): string;
     }
-    /** @internal */
-    interface ModuleSpecifierResolutionHost extends GetEffectiveTypeRootsHost {
-        useCaseSensitiveFileNames?(): boolean;
-        fileExists?(path: string): boolean;
-        readFile?(path: string): string | undefined;
-    }
     /** @deprecated See comment on SymbolWriter */
     interface SymbolTracker {
         trackSymbol?(symbol: Symbol, enclosingDeclaration?: Node, meaning?: SymbolFlags): void;
         reportInaccessibleThisError?(): void;
         reportPrivateInBaseOfClassExpression?(propertyName: string): void;
         reportInaccessibleUniqueSymbolError?(): void;
-        moduleResolverHost?: ModuleSpecifierResolutionHost;
-        trackReferencedAmbientModule?(decl: ModuleDeclaration): void;
     }
     interface TextSpan {
         start: number;
@@ -4500,13 +2932,6 @@ declare namespace ts {
         span: TextSpan;
         newLength: number;
     }
-    interface DiagnosticCollection {
-        add(diagnostic: Diagnostic): void;
-        getGlobalDiagnostics(): Diagnostic[];
-        getDiagnostics(fileName: string): DiagnosticWithLocation[];
-        getDiagnostics(): Diagnostic[];
-        reattachFileDiagnostics(newFile: SourceFile): void;
-    }
     interface SyntaxList extends Node {
         _children: Node[];
     }
@@ -4575,145 +3000,10 @@ declare namespace ts {
         Parameters = 1296,
         IndexSignatureParameters = 4432
     }
-    enum PragmaKindFlags {
-        None = 0,
-        /**
-         * Triple slash comment of the form
-         * /// <pragma-name argname="value" />
-         */
-        TripleSlashXML = 1,
-        /**
-         * Single line comment of the form
-         * // @pragma-name argval1 argval2
-         * or
-         * /// @pragma-name argval1 argval2
-         */
-        SingleLine = 2,
-        /**
-         * Multiline non-jsdoc pragma of the form
-         * /* @pragma-name argval1 argval2 * /
-         */
-        MultiLine = 4,
-        All = 7,
-        Default = 7
-    }
-    interface PragmaArgumentSpecification<TName extends string> {
-        name: TName;
-        optional?: boolean;
-        captureSpan?: boolean;
-    }
-    interface PragmaDefinition<T1 extends string = string, T2 extends string = string, T3 extends string = string, T4 extends string = string> {
-        args?: [PragmaArgumentSpecification<T1>] | [PragmaArgumentSpecification<T1>, PragmaArgumentSpecification<T2>] | [PragmaArgumentSpecification<T1>, PragmaArgumentSpecification<T2>, PragmaArgumentSpecification<T3>] | [PragmaArgumentSpecification<T1>, PragmaArgumentSpecification<T2>, PragmaArgumentSpecification<T3>, PragmaArgumentSpecification<T4>];
-        kind?: PragmaKindFlags;
-    }
-    const commentPragmas: {
-        "reference": {
-            args: [{
-                name: "types";
-                optional: true;
-                captureSpan: true;
-            }, {
-                name: "lib";
-                optional: true;
-                captureSpan: true;
-            }, {
-                name: "path";
-                optional: true;
-                captureSpan: true;
-            }, {
-                name: "no-default-lib";
-                optional: true;
-            }];
-            kind: PragmaKindFlags;
-        };
-        "amd-dependency": {
-            args: [{
-                name: "path";
-            }, {
-                name: "name";
-                optional: true;
-            }];
-            kind: PragmaKindFlags;
-        };
-        "amd-module": {
-            args: [{
-                name: "name";
-            }];
-            kind: PragmaKindFlags;
-        };
-        "ts-check": {
-            kind: PragmaKindFlags;
-        };
-        "ts-nocheck": {
-            kind: PragmaKindFlags;
-        };
-        "jsx": {
-            args: [{
-                name: "factory";
-            }];
-            kind: PragmaKindFlags;
-        };
-    };
-    type PragmaArgTypeMaybeCapture<TDesc> = TDesc extends {
-        captureSpan: true;
-    } ? {
-        value: string;
-        pos: number;
-        end: number;
-    } : string;
-    type PragmaArgTypeOptional<TDesc, TName extends string> = TDesc extends {
-        optional: true;
-    } ? {
-        [K in TName]?: PragmaArgTypeMaybeCapture<TDesc>;
-    } : {
-        [K in TName]: PragmaArgTypeMaybeCapture<TDesc>;
-    };
-    /**
-     * Maps a pragma definition into the desired shape for its arguments object
-     * Maybe the below is a good argument for types being iterable on struture in some way.
-     */
-    type PragmaArgumentType<T extends PragmaDefinition> = T extends {
-        args: [PragmaArgumentSpecification<infer TName1>, PragmaArgumentSpecification<infer TName2>, PragmaArgumentSpecification<infer TName3>, PragmaArgumentSpecification<infer TName4>];
-    } ? PragmaArgTypeOptional<T["args"][0], TName1> & PragmaArgTypeOptional<T["args"][1], TName2> & PragmaArgTypeOptional<T["args"][2], TName3> & PragmaArgTypeOptional<T["args"][2], TName4> : T extends {
-        args: [PragmaArgumentSpecification<infer TName1>, PragmaArgumentSpecification<infer TName2>, PragmaArgumentSpecification<infer TName3>];
-    } ? PragmaArgTypeOptional<T["args"][0], TName1> & PragmaArgTypeOptional<T["args"][1], TName2> & PragmaArgTypeOptional<T["args"][2], TName3> : T extends {
-        args: [PragmaArgumentSpecification<infer TName1>, PragmaArgumentSpecification<infer TName2>];
-    } ? PragmaArgTypeOptional<T["args"][0], TName1> & PragmaArgTypeOptional<T["args"][1], TName2> : T extends {
-        args: [PragmaArgumentSpecification<infer TName>];
-    } ? PragmaArgTypeOptional<T["args"][0], TName> : object;
-    type ConcretePragmaSpecs = typeof commentPragmas;
-    type PragmaPsuedoMap = {
-        [K in keyof ConcretePragmaSpecs]?: {
-            arguments: PragmaArgumentType<ConcretePragmaSpecs[K]>;
-            range: CommentRange;
-        };
-    };
-    type PragmaPsuedoMapEntry = {
-        [K in keyof PragmaPsuedoMap]: {
-            name: K;
-            args: PragmaPsuedoMap[K];
-        };
-    }[keyof PragmaPsuedoMap];
-    /**
-     * A strongly-typed es6 map of pragma entries, the values of which are either a single argument
-     * value (if only one was found), or an array of multiple argument values if the pragma is present
-     * in multiple places
-     */
-    interface PragmaMap extends Map<PragmaPsuedoMap[keyof PragmaPsuedoMap] | PragmaPsuedoMap[keyof PragmaPsuedoMap][]> {
-        set<TKey extends keyof PragmaPsuedoMap>(key: TKey, value: PragmaPsuedoMap[TKey] | PragmaPsuedoMap[TKey][]): this;
-        get<TKey extends keyof PragmaPsuedoMap>(key: TKey): PragmaPsuedoMap[TKey] | PragmaPsuedoMap[TKey][];
-        forEach(action: <TKey extends keyof PragmaPsuedoMap>(value: PragmaPsuedoMap[TKey] | PragmaPsuedoMap[TKey][], key: TKey) => void): void;
-    }
 }
 declare function setTimeout(handler: (...args: any[]) => void, timeout: number): any;
 declare function clearTimeout(handle: any): void;
 declare namespace ts {
-    /**
-     * Set a high stack trace limit to provide more information in case of an error.
-     * Called for command-line and server use cases.
-     * Not called if TypeScript is used as a library.
-     */
-    function setStackTraceLimit(): void;
     enum FileWatcherEventKind {
         Created = 0,
         Changed = 1,
@@ -4721,47 +3011,6 @@ declare namespace ts {
     }
     type FileWatcherCallback = (fileName: string, eventKind: FileWatcherEventKind) => void;
     type DirectoryWatcherCallback = (fileName: string) => void;
-    interface WatchedFile {
-        readonly fileName: string;
-        readonly callback: FileWatcherCallback;
-        mtime: Date;
-    }
-    enum PollingInterval {
-        High = 2000,
-        Medium = 500,
-        Low = 250
-    }
-    function watchFileUsingPriorityPollingInterval(host: System, fileName: string, callback: FileWatcherCallback, watchPriority: PollingInterval): FileWatcher;
-    type HostWatchFile = (fileName: string, callback: FileWatcherCallback, pollingInterval: PollingInterval | undefined) => FileWatcher;
-    type HostWatchDirectory = (fileName: string, callback: DirectoryWatcherCallback, recursive?: boolean) => FileWatcher;
-    const missingFileModifiedTime: Date;
-    let unchangedPollThresholds: {
-        [PollingInterval.Low]: number;
-        [PollingInterval.Medium]: number;
-        [PollingInterval.High]: number;
-    };
-    function setCustomPollingValues(system: System): void;
-    function createDynamicPriorityPollingWatchFile(host: {
-        getModifiedTime: System["getModifiedTime"];
-        setTimeout: System["setTimeout"];
-    }): HostWatchFile;
-    /**
-     * Returns true if file status changed
-     */
-    function onWatchedFileStat(watchedFile: WatchedFile, modifiedTime: Date): boolean;
-    interface RecursiveDirectoryWatcherHost {
-        watchDirectory: HostWatchDirectory;
-        getAccessibleSortedChildDirectories(path: string): ReadonlyArray<string>;
-        directoryExists(dir: string): boolean;
-        filePathComparer: Comparer<string>;
-        realpath(s: string): string;
-    }
-    /**
-     * Watch the directory recursively using host provided method to watch child directories
-     * that means if this is recursive watcher, watch the children directories as well
-     * (eg on OS that dont support recursive watch using fs.watch use fs.watchFile)
-     */
-    function createRecursiveDirectoryWatcher(host: RecursiveDirectoryWatcherHost): (directoryName: string, callback: DirectoryWatcherCallback) => FileWatcher;
     interface System {
         args: string[];
         newLine: string;
@@ -4797,13 +3046,9 @@ declare namespace ts {
         getMemoryUsage?(): number;
         exit(exitCode?: number): void;
         realpath?(path: string): string;
-        getEnvironmentVariable(name: string): string;
-        tryEnableSourceMapsForHost?(): void;
-        debugMode?: boolean;
         setTimeout?(callback: (...args: any[]) => void, ms: number, ...args: any[]): any;
         clearTimeout?(timeoutId: any): void;
         clearScreen?(): void;
-        setBlocking?(): void;
         base64decode?(input: string): string;
         base64encode?(input: string): string;
     }
@@ -4813,1112 +3058,8 @@ declare namespace ts {
     function getNodeMajorVersion(): number | undefined;
     let sys: System;
 }
-declare namespace ts {
-    const Diagnostics: {
-        Unterminated_string_literal: DiagnosticMessage;
-        Identifier_expected: DiagnosticMessage;
-        _0_expected: DiagnosticMessage;
-        A_file_cannot_have_a_reference_to_itself: DiagnosticMessage;
-        Trailing_comma_not_allowed: DiagnosticMessage;
-        Asterisk_Slash_expected: DiagnosticMessage;
-        An_element_access_expression_should_take_an_argument: DiagnosticMessage;
-        Unexpected_token: DiagnosticMessage;
-        A_rest_parameter_or_binding_pattern_may_not_have_a_trailing_comma: DiagnosticMessage;
-        A_rest_parameter_must_be_last_in_a_parameter_list: DiagnosticMessage;
-        Parameter_cannot_have_question_mark_and_initializer: DiagnosticMessage;
-        A_required_parameter_cannot_follow_an_optional_parameter: DiagnosticMessage;
-        An_index_signature_cannot_have_a_rest_parameter: DiagnosticMessage;
-        An_index_signature_parameter_cannot_have_an_accessibility_modifier: DiagnosticMessage;
-        An_index_signature_parameter_cannot_have_a_question_mark: DiagnosticMessage;
-        An_index_signature_parameter_cannot_have_an_initializer: DiagnosticMessage;
-        An_index_signature_must_have_a_type_annotation: DiagnosticMessage;
-        An_index_signature_parameter_must_have_a_type_annotation: DiagnosticMessage;
-        An_index_signature_parameter_type_must_be_string_or_number: DiagnosticMessage;
-        readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature: DiagnosticMessage;
-        Accessibility_modifier_already_seen: DiagnosticMessage;
-        _0_modifier_must_precede_1_modifier: DiagnosticMessage;
-        _0_modifier_already_seen: DiagnosticMessage;
-        _0_modifier_cannot_appear_on_a_class_element: DiagnosticMessage;
-        super_must_be_followed_by_an_argument_list_or_member_access: DiagnosticMessage;
-        Only_ambient_modules_can_use_quoted_names: DiagnosticMessage;
-        Statements_are_not_allowed_in_ambient_contexts: DiagnosticMessage;
-        A_declare_modifier_cannot_be_used_in_an_already_ambient_context: DiagnosticMessage;
-        Initializers_are_not_allowed_in_ambient_contexts: DiagnosticMessage;
-        _0_modifier_cannot_be_used_in_an_ambient_context: DiagnosticMessage;
-        _0_modifier_cannot_be_used_with_a_class_declaration: DiagnosticMessage;
-        _0_modifier_cannot_be_used_here: DiagnosticMessage;
-        _0_modifier_cannot_appear_on_a_data_property: DiagnosticMessage;
-        _0_modifier_cannot_appear_on_a_module_or_namespace_element: DiagnosticMessage;
-        A_0_modifier_cannot_be_used_with_an_interface_declaration: DiagnosticMessage;
-        A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file: DiagnosticMessage;
-        A_rest_parameter_cannot_be_optional: DiagnosticMessage;
-        A_rest_parameter_cannot_have_an_initializer: DiagnosticMessage;
-        A_set_accessor_must_have_exactly_one_parameter: DiagnosticMessage;
-        A_set_accessor_cannot_have_an_optional_parameter: DiagnosticMessage;
-        A_set_accessor_parameter_cannot_have_an_initializer: DiagnosticMessage;
-        A_set_accessor_cannot_have_rest_parameter: DiagnosticMessage;
-        A_get_accessor_cannot_have_parameters: DiagnosticMessage;
-        Type_0_is_not_a_valid_async_function_return_type_in_ES5_SlashES3_because_it_does_not_refer_to_a_Promise_compatible_constructor_value: DiagnosticMessage;
-        Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher: DiagnosticMessage;
-        An_async_function_or_method_must_have_a_valid_awaitable_return_type: DiagnosticMessage;
-        The_return_type_of_an_async_function_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member: DiagnosticMessage;
-        A_promise_must_have_a_then_method: DiagnosticMessage;
-        The_first_parameter_of_the_then_method_of_a_promise_must_be_a_callback: DiagnosticMessage;
-        Enum_member_must_have_initializer: DiagnosticMessage;
-        Type_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method: DiagnosticMessage;
-        An_export_assignment_cannot_be_used_in_a_namespace: DiagnosticMessage;
-        The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type: DiagnosticMessage;
-        In_ambient_enum_declarations_member_initializer_must_be_constant_expression: DiagnosticMessage;
-        Unexpected_token_A_constructor_method_accessor_or_property_was_expected: DiagnosticMessage;
-        Unexpected_token_A_type_parameter_name_was_expected_without_curly_braces: DiagnosticMessage;
-        _0_modifier_cannot_appear_on_a_type_member: DiagnosticMessage;
-        _0_modifier_cannot_appear_on_an_index_signature: DiagnosticMessage;
-        A_0_modifier_cannot_be_used_with_an_import_declaration: DiagnosticMessage;
-        Invalid_reference_directive_syntax: DiagnosticMessage;
-        Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher_Use_the_syntax_0: DiagnosticMessage;
-        An_accessor_cannot_be_declared_in_an_ambient_context: DiagnosticMessage;
-        _0_modifier_cannot_appear_on_a_constructor_declaration: DiagnosticMessage;
-        _0_modifier_cannot_appear_on_a_parameter: DiagnosticMessage;
-        Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement: DiagnosticMessage;
-        Type_parameters_cannot_appear_on_a_constructor_declaration: DiagnosticMessage;
-        Type_annotation_cannot_appear_on_a_constructor_declaration: DiagnosticMessage;
-        An_accessor_cannot_have_type_parameters: DiagnosticMessage;
-        A_set_accessor_cannot_have_a_return_type_annotation: DiagnosticMessage;
-        An_index_signature_must_have_exactly_one_parameter: DiagnosticMessage;
-        _0_list_cannot_be_empty: DiagnosticMessage;
-        Type_parameter_list_cannot_be_empty: DiagnosticMessage;
-        Type_argument_list_cannot_be_empty: DiagnosticMessage;
-        Invalid_use_of_0_in_strict_mode: DiagnosticMessage;
-        with_statements_are_not_allowed_in_strict_mode: DiagnosticMessage;
-        delete_cannot_be_called_on_an_identifier_in_strict_mode: DiagnosticMessage;
-        A_for_await_of_statement_is_only_allowed_within_an_async_function_or_async_generator: DiagnosticMessage;
-        A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement: DiagnosticMessage;
-        A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement: DiagnosticMessage;
-        Jump_target_cannot_cross_function_boundary: DiagnosticMessage;
-        A_return_statement_can_only_be_used_within_a_function_body: DiagnosticMessage;
-        Expression_expected: DiagnosticMessage;
-        Type_expected: DiagnosticMessage;
-        A_default_clause_cannot_appear_more_than_once_in_a_switch_statement: DiagnosticMessage;
-        Duplicate_label_0: DiagnosticMessage;
-        A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement: DiagnosticMessage;
-        A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement: DiagnosticMessage;
-        An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode: DiagnosticMessage;
-        An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name: DiagnosticMessage;
-        An_object_literal_cannot_have_property_and_accessor_with_the_same_name: DiagnosticMessage;
-        An_export_assignment_cannot_have_modifiers: DiagnosticMessage;
-        Octal_literals_are_not_allowed_in_strict_mode: DiagnosticMessage;
-        Variable_declaration_list_cannot_be_empty: DiagnosticMessage;
-        Digit_expected: DiagnosticMessage;
-        Hexadecimal_digit_expected: DiagnosticMessage;
-        Unexpected_end_of_text: DiagnosticMessage;
-        Invalid_character: DiagnosticMessage;
-        Declaration_or_statement_expected: DiagnosticMessage;
-        Statement_expected: DiagnosticMessage;
-        case_or_default_expected: DiagnosticMessage;
-        Property_or_signature_expected: DiagnosticMessage;
-        Enum_member_expected: DiagnosticMessage;
-        Variable_declaration_expected: DiagnosticMessage;
-        Argument_expression_expected: DiagnosticMessage;
-        Property_assignment_expected: DiagnosticMessage;
-        Expression_or_comma_expected: DiagnosticMessage;
-        Parameter_declaration_expected: DiagnosticMessage;
-        Type_parameter_declaration_expected: DiagnosticMessage;
-        Type_argument_expected: DiagnosticMessage;
-        String_literal_expected: DiagnosticMessage;
-        Line_break_not_permitted_here: DiagnosticMessage;
-        or_expected: DiagnosticMessage;
-        Declaration_expected: DiagnosticMessage;
-        Import_declarations_in_a_namespace_cannot_reference_a_module: DiagnosticMessage;
-        Cannot_use_imports_exports_or_module_augmentations_when_module_is_none: DiagnosticMessage;
-        File_name_0_differs_from_already_included_file_name_1_only_in_casing: DiagnosticMessage;
-        new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead: DiagnosticMessage;
-        const_declarations_must_be_initialized: DiagnosticMessage;
-        const_declarations_can_only_be_declared_inside_a_block: DiagnosticMessage;
-        let_declarations_can_only_be_declared_inside_a_block: DiagnosticMessage;
-        Unterminated_template_literal: DiagnosticMessage;
-        Unterminated_regular_expression_literal: DiagnosticMessage;
-        An_object_member_cannot_be_declared_optional: DiagnosticMessage;
-        A_yield_expression_is_only_allowed_in_a_generator_body: DiagnosticMessage;
-        Computed_property_names_are_not_allowed_in_enums: DiagnosticMessage;
-        A_computed_property_name_in_an_ambient_context_must_refer_to_an_expression_whose_type_is_a_literal_type_or_a_unique_symbol_type: DiagnosticMessage;
-        A_computed_property_name_in_a_class_property_declaration_must_refer_to_an_expression_whose_type_is_a_literal_type_or_a_unique_symbol_type: DiagnosticMessage;
-        A_computed_property_name_in_a_method_overload_must_refer_to_an_expression_whose_type_is_a_literal_type_or_a_unique_symbol_type: DiagnosticMessage;
-        A_computed_property_name_in_an_interface_must_refer_to_an_expression_whose_type_is_a_literal_type_or_a_unique_symbol_type: DiagnosticMessage;
-        A_computed_property_name_in_a_type_literal_must_refer_to_an_expression_whose_type_is_a_literal_type_or_a_unique_symbol_type: DiagnosticMessage;
-        A_comma_expression_is_not_allowed_in_a_computed_property_name: DiagnosticMessage;
-        extends_clause_already_seen: DiagnosticMessage;
-        extends_clause_must_precede_implements_clause: DiagnosticMessage;
-        Classes_can_only_extend_a_single_class: DiagnosticMessage;
-        implements_clause_already_seen: DiagnosticMessage;
-        Interface_declaration_cannot_have_implements_clause: DiagnosticMessage;
-        Binary_digit_expected: DiagnosticMessage;
-        Octal_digit_expected: DiagnosticMessage;
-        Unexpected_token_expected: DiagnosticMessage;
-        Property_destructuring_pattern_expected: DiagnosticMessage;
-        Array_element_destructuring_pattern_expected: DiagnosticMessage;
-        A_destructuring_declaration_must_have_an_initializer: DiagnosticMessage;
-        An_implementation_cannot_be_declared_in_ambient_contexts: DiagnosticMessage;
-        Modifiers_cannot_appear_here: DiagnosticMessage;
-        Merge_conflict_marker_encountered: DiagnosticMessage;
-        A_rest_element_cannot_have_an_initializer: DiagnosticMessage;
-        A_parameter_property_may_not_be_declared_using_a_binding_pattern: DiagnosticMessage;
-        Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement: DiagnosticMessage;
-        The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer: DiagnosticMessage;
-        The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer: DiagnosticMessage;
-        An_import_declaration_cannot_have_modifiers: DiagnosticMessage;
-        Module_0_has_no_default_export: DiagnosticMessage;
-        An_export_declaration_cannot_have_modifiers: DiagnosticMessage;
-        Export_declarations_are_not_permitted_in_a_namespace: DiagnosticMessage;
-        Catch_clause_variable_cannot_have_a_type_annotation: DiagnosticMessage;
-        Catch_clause_variable_cannot_have_an_initializer: DiagnosticMessage;
-        An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive: DiagnosticMessage;
-        Unterminated_Unicode_escape_sequence: DiagnosticMessage;
-        Line_terminator_not_permitted_before_arrow: DiagnosticMessage;
-        Import_assignment_cannot_be_used_when_targeting_ECMAScript_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead: DiagnosticMessage;
-        Export_assignment_cannot_be_used_when_targeting_ECMAScript_modules_Consider_using_export_default_or_another_module_format_instead: DiagnosticMessage;
-        Cannot_re_export_a_type_when_the_isolatedModules_flag_is_provided: DiagnosticMessage;
-        Decorators_are_not_valid_here: DiagnosticMessage;
-        Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name: DiagnosticMessage;
-        Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided: DiagnosticMessage;
-        Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided: DiagnosticMessage;
-        Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode: DiagnosticMessage;
-        A_class_declaration_without_the_default_modifier_must_have_a_name: DiagnosticMessage;
-        Identifier_expected_0_is_a_reserved_word_in_strict_mode: DiagnosticMessage;
-        Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_strict_mode: DiagnosticMessage;
-        Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode: DiagnosticMessage;
-        Invalid_use_of_0_Modules_are_automatically_in_strict_mode: DiagnosticMessage;
-        Identifier_expected_esModule_is_reserved_as_an_exported_marker_when_transforming_ECMAScript_modules: DiagnosticMessage;
-        Export_assignment_is_not_supported_when_module_flag_is_system: DiagnosticMessage;
-        Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning: DiagnosticMessage;
-        Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher: DiagnosticMessage;
-        Generators_are_not_allowed_in_an_ambient_context: DiagnosticMessage;
-        An_overload_signature_cannot_be_declared_as_a_generator: DiagnosticMessage;
-        _0_tag_already_specified: DiagnosticMessage;
-        Signature_0_must_be_a_type_predicate: DiagnosticMessage;
-        Cannot_find_parameter_0: DiagnosticMessage;
-        Type_predicate_0_is_not_assignable_to_1: DiagnosticMessage;
-        Parameter_0_is_not_in_the_same_position_as_parameter_1: DiagnosticMessage;
-        A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods: DiagnosticMessage;
-        A_type_predicate_cannot_reference_a_rest_parameter: DiagnosticMessage;
-        A_type_predicate_cannot_reference_element_0_in_a_binding_pattern: DiagnosticMessage;
-        An_export_assignment_can_only_be_used_in_a_module: DiagnosticMessage;
-        An_import_declaration_can_only_be_used_in_a_namespace_or_module: DiagnosticMessage;
-        An_export_declaration_can_only_be_used_in_a_module: DiagnosticMessage;
-        An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file: DiagnosticMessage;
-        A_namespace_declaration_is_only_allowed_in_a_namespace_or_module: DiagnosticMessage;
-        The_return_type_of_a_property_decorator_function_must_be_either_void_or_any: DiagnosticMessage;
-        The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any: DiagnosticMessage;
-        Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression: DiagnosticMessage;
-        Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression: DiagnosticMessage;
-        Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression: DiagnosticMessage;
-        Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression: DiagnosticMessage;
-        abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration: DiagnosticMessage;
-        _0_modifier_cannot_be_used_with_1_modifier: DiagnosticMessage;
-        Abstract_methods_can_only_appear_within_an_abstract_class: DiagnosticMessage;
-        Method_0_cannot_have_an_implementation_because_it_is_marked_abstract: DiagnosticMessage;
-        An_interface_property_cannot_have_an_initializer: DiagnosticMessage;
-        A_type_literal_property_cannot_have_an_initializer: DiagnosticMessage;
-        A_class_member_cannot_have_the_0_keyword: DiagnosticMessage;
-        A_decorator_can_only_decorate_a_method_implementation_not_an_overload: DiagnosticMessage;
-        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5: DiagnosticMessage;
-        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_definitions_are_automatically_in_strict_mode: DiagnosticMessage;
-        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_are_automatically_in_strict_mode: DiagnosticMessage;
-        _0_tag_cannot_be_used_independently_as_a_top_level_JSDoc_tag: DiagnosticMessage;
-        A_const_initializer_in_an_ambient_context_must_be_a_string_or_numeric_literal: DiagnosticMessage;
-        A_definite_assignment_assertion_is_not_permitted_in_this_context: DiagnosticMessage;
-        with_statements_are_not_allowed_in_an_async_function_block: DiagnosticMessage;
-        await_expression_is_only_allowed_within_an_async_function: DiagnosticMessage;
-        can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment: DiagnosticMessage;
-        The_body_of_an_if_statement_cannot_be_the_empty_statement: DiagnosticMessage;
-        Global_module_exports_may_only_appear_in_module_files: DiagnosticMessage;
-        Global_module_exports_may_only_appear_in_declaration_files: DiagnosticMessage;
-        Global_module_exports_may_only_appear_at_top_level: DiagnosticMessage;
-        A_parameter_property_cannot_be_declared_using_a_rest_parameter: DiagnosticMessage;
-        An_abstract_accessor_cannot_have_an_implementation: DiagnosticMessage;
-        A_default_export_can_only_be_used_in_an_ECMAScript_style_module: DiagnosticMessage;
-        Type_of_await_operand_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member: DiagnosticMessage;
-        Type_of_yield_operand_in_an_async_generator_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member: DiagnosticMessage;
-        Type_of_iterated_elements_of_a_yield_Asterisk_operand_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member: DiagnosticMessage;
-        Dynamic_import_is_only_supported_when_module_flag_is_commonjs_or_esNext: DiagnosticMessage;
-        Dynamic_import_must_have_one_specifier_as_an_argument: DiagnosticMessage;
-        Specifier_of_dynamic_import_cannot_be_spread_element: DiagnosticMessage;
-        Dynamic_import_cannot_have_type_arguments: DiagnosticMessage;
-        String_literal_with_double_quotes_expected: DiagnosticMessage;
-        Property_value_can_only_be_string_literal_numeric_literal_true_false_null_object_literal_or_array_literal: DiagnosticMessage;
-        _0_accepts_too_few_arguments_to_be_used_as_a_decorator_here_Did_you_mean_to_call_it_first_and_write_0: DiagnosticMessage;
-        A_property_of_an_interface_or_type_literal_whose_type_is_a_unique_symbol_type_must_be_readonly: DiagnosticMessage;
-        A_property_of_a_class_whose_type_is_a_unique_symbol_type_must_be_both_static_and_readonly: DiagnosticMessage;
-        A_variable_whose_type_is_a_unique_symbol_type_must_be_const: DiagnosticMessage;
-        unique_symbol_types_may_not_be_used_on_a_variable_declaration_with_a_binding_name: DiagnosticMessage;
-        unique_symbol_types_are_only_allowed_on_variables_in_a_variable_statement: DiagnosticMessage;
-        unique_symbol_types_are_not_allowed_here: DiagnosticMessage;
-        An_index_signature_parameter_type_cannot_be_a_type_alias_Consider_writing_0_Colon_1_Colon_2_instead: DiagnosticMessage;
-        An_index_signature_parameter_type_cannot_be_a_union_type_Consider_using_a_mapped_object_type_instead: DiagnosticMessage;
-        infer_declarations_are_only_permitted_in_the_extends_clause_of_a_conditional_type: DiagnosticMessage;
-        Module_0_does_not_refer_to_a_value_but_is_used_as_a_value_here: DiagnosticMessage;
-        Module_0_does_not_refer_to_a_type_but_is_used_as_a_type_here: DiagnosticMessage;
-        Type_arguments_cannot_be_used_here: DiagnosticMessage;
-        The_import_meta_meta_property_is_only_allowed_using_ESNext_for_the_target_and_module_compiler_options: DiagnosticMessage;
-        Duplicate_identifier_0: DiagnosticMessage;
-        Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor: DiagnosticMessage;
-        Static_members_cannot_reference_class_type_parameters: DiagnosticMessage;
-        Circular_definition_of_import_alias_0: DiagnosticMessage;
-        Cannot_find_name_0: DiagnosticMessage;
-        Module_0_has_no_exported_member_1: DiagnosticMessage;
-        File_0_is_not_a_module: DiagnosticMessage;
-        Cannot_find_module_0: DiagnosticMessage;
-        Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambiguity: DiagnosticMessage;
-        An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements: DiagnosticMessage;
-        Type_0_recursively_references_itself_as_a_base_type: DiagnosticMessage;
-        A_class_may_only_extend_another_class: DiagnosticMessage;
-        An_interface_may_only_extend_a_class_or_another_interface: DiagnosticMessage;
-        Type_parameter_0_has_a_circular_constraint: DiagnosticMessage;
-        Generic_type_0_requires_1_type_argument_s: DiagnosticMessage;
-        Type_0_is_not_generic: DiagnosticMessage;
-        Global_type_0_must_be_a_class_or_interface_type: DiagnosticMessage;
-        Global_type_0_must_have_1_type_parameter_s: DiagnosticMessage;
-        Cannot_find_global_type_0: DiagnosticMessage;
-        Named_property_0_of_types_1_and_2_are_not_identical: DiagnosticMessage;
-        Interface_0_cannot_simultaneously_extend_types_1_and_2: DiagnosticMessage;
-        Excessive_stack_depth_comparing_types_0_and_1: DiagnosticMessage;
-        Type_0_is_not_assignable_to_type_1: DiagnosticMessage;
-        Cannot_redeclare_exported_variable_0: DiagnosticMessage;
-        Property_0_is_missing_in_type_1: DiagnosticMessage;
-        Property_0_is_private_in_type_1_but_not_in_type_2: DiagnosticMessage;
-        Types_of_property_0_are_incompatible: DiagnosticMessage;
-        Property_0_is_optional_in_type_1_but_required_in_type_2: DiagnosticMessage;
-        Types_of_parameters_0_and_1_are_incompatible: DiagnosticMessage;
-        Index_signature_is_missing_in_type_0: DiagnosticMessage;
-        Index_signatures_are_incompatible: DiagnosticMessage;
-        this_cannot_be_referenced_in_a_module_or_namespace_body: DiagnosticMessage;
-        this_cannot_be_referenced_in_current_location: DiagnosticMessage;
-        this_cannot_be_referenced_in_constructor_arguments: DiagnosticMessage;
-        this_cannot_be_referenced_in_a_static_property_initializer: DiagnosticMessage;
-        super_can_only_be_referenced_in_a_derived_class: DiagnosticMessage;
-        super_cannot_be_referenced_in_constructor_arguments: DiagnosticMessage;
-        Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors: DiagnosticMessage;
-        super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_derived_class: DiagnosticMessage;
-        Property_0_does_not_exist_on_type_1: DiagnosticMessage;
-        Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword: DiagnosticMessage;
-        Property_0_is_private_and_only_accessible_within_class_1: DiagnosticMessage;
-        An_index_expression_argument_must_be_of_type_string_number_symbol_or_any: DiagnosticMessage;
-        This_syntax_requires_an_imported_helper_named_1_but_module_0_has_no_exported_member_1: DiagnosticMessage;
-        Type_0_does_not_satisfy_the_constraint_1: DiagnosticMessage;
-        Argument_of_type_0_is_not_assignable_to_parameter_of_type_1: DiagnosticMessage;
-        Call_target_does_not_contain_any_signatures: DiagnosticMessage;
-        Untyped_function_calls_may_not_accept_type_arguments: DiagnosticMessage;
-        Value_of_type_0_is_not_callable_Did_you_mean_to_include_new: DiagnosticMessage;
-        Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures: DiagnosticMessage;
-        Only_a_void_function_can_be_called_with_the_new_keyword: DiagnosticMessage;
-        Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature: DiagnosticMessage;
-        Type_0_cannot_be_converted_to_type_1: DiagnosticMessage;
-        Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1: DiagnosticMessage;
-        This_syntax_requires_an_imported_helper_but_module_0_cannot_be_found: DiagnosticMessage;
-        A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value: DiagnosticMessage;
-        An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type: DiagnosticMessage;
-        The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_or_a_property_access: DiagnosticMessage;
-        The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_parameter: DiagnosticMessage;
-        The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_Function_interface_type: DiagnosticMessage;
-        The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol: DiagnosticMessage;
-        The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter: DiagnosticMessage;
-        The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type: DiagnosticMessage;
-        The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type: DiagnosticMessage;
-        The_left_hand_side_of_an_assignment_expression_must_be_a_variable_or_a_property_access: DiagnosticMessage;
-        Operator_0_cannot_be_applied_to_types_1_and_2: DiagnosticMessage;
-        Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined: DiagnosticMessage;
-        Type_parameter_name_cannot_be_0: DiagnosticMessage;
-        A_parameter_property_is_only_allowed_in_a_constructor_implementation: DiagnosticMessage;
-        A_rest_parameter_must_be_of_an_array_type: DiagnosticMessage;
-        A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation: DiagnosticMessage;
-        Parameter_0_cannot_be_referenced_in_its_initializer: DiagnosticMessage;
-        Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it: DiagnosticMessage;
-        Duplicate_string_index_signature: DiagnosticMessage;
-        Duplicate_number_index_signature: DiagnosticMessage;
-        A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_properties_or_has_parameter_properties: DiagnosticMessage;
-        Constructors_for_derived_classes_must_contain_a_super_call: DiagnosticMessage;
-        A_get_accessor_must_return_a_value: DiagnosticMessage;
-        Getter_and_setter_accessors_do_not_agree_in_visibility: DiagnosticMessage;
-        get_and_set_accessor_must_have_the_same_type: DiagnosticMessage;
-        A_signature_with_an_implementation_cannot_use_a_string_literal_type: DiagnosticMessage;
-        Specialized_overload_signature_is_not_assignable_to_any_non_specialized_signature: DiagnosticMessage;
-        Overload_signatures_must_all_be_exported_or_non_exported: DiagnosticMessage;
-        Overload_signatures_must_all_be_ambient_or_non_ambient: DiagnosticMessage;
-        Overload_signatures_must_all_be_public_private_or_protected: DiagnosticMessage;
-        Overload_signatures_must_all_be_optional_or_required: DiagnosticMessage;
-        Function_overload_must_be_static: DiagnosticMessage;
-        Function_overload_must_not_be_static: DiagnosticMessage;
-        Function_implementation_name_must_be_0: DiagnosticMessage;
-        Constructor_implementation_is_missing: DiagnosticMessage;
-        Function_implementation_is_missing_or_not_immediately_following_the_declaration: DiagnosticMessage;
-        Multiple_constructor_implementations_are_not_allowed: DiagnosticMessage;
-        Duplicate_function_implementation: DiagnosticMessage;
-        Overload_signature_is_not_compatible_with_function_implementation: DiagnosticMessage;
-        Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local: DiagnosticMessage;
-        Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters: DiagnosticMessage;
-        Declaration_name_conflicts_with_built_in_global_identifier_0: DiagnosticMessage;
-        Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference: DiagnosticMessage;
-        Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference: DiagnosticMessage;
-        Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference: DiagnosticMessage;
-        Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference: DiagnosticMessage;
-        Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_type_2: DiagnosticMessage;
-        The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation: DiagnosticMessage;
-        The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any: DiagnosticMessage;
-        The_left_hand_side_of_a_for_in_statement_must_be_a_variable_or_a_property_access: DiagnosticMessage;
-        The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter_but_here_has_type_0: DiagnosticMessage;
-        Setters_cannot_return_a_value: DiagnosticMessage;
-        Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class: DiagnosticMessage;
-        The_with_statement_is_not_supported_All_symbols_in_a_with_block_will_have_type_any: DiagnosticMessage;
-        Property_0_of_type_1_is_not_assignable_to_string_index_type_2: DiagnosticMessage;
-        Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2: DiagnosticMessage;
-        Numeric_index_type_0_is_not_assignable_to_string_index_type_1: DiagnosticMessage;
-        Class_name_cannot_be_0: DiagnosticMessage;
-        Class_0_incorrectly_extends_base_class_1: DiagnosticMessage;
-        Property_0_in_type_1_is_not_assignable_to_the_same_property_in_base_type_2: DiagnosticMessage;
-        Class_static_side_0_incorrectly_extends_base_class_static_side_1: DiagnosticMessage;
-        Class_0_incorrectly_implements_interface_1: DiagnosticMessage;
-        A_class_may_only_implement_another_class_or_interface: DiagnosticMessage;
-        Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_accessor: DiagnosticMessage;
-        Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_property: DiagnosticMessage;
-        Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_function: DiagnosticMessage;
-        Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_function: DiagnosticMessage;
-        Interface_name_cannot_be_0: DiagnosticMessage;
-        All_declarations_of_0_must_have_identical_type_parameters: DiagnosticMessage;
-        Interface_0_incorrectly_extends_interface_1: DiagnosticMessage;
-        Enum_name_cannot_be_0: DiagnosticMessage;
-        In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enum_element: DiagnosticMessage;
-        A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merged: DiagnosticMessage;
-        A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged: DiagnosticMessage;
-        Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces: DiagnosticMessage;
-        Ambient_module_declaration_cannot_specify_relative_module_name: DiagnosticMessage;
-        Module_0_is_hidden_by_a_local_declaration_with_the_same_name: DiagnosticMessage;
-        Import_name_cannot_be_0: DiagnosticMessage;
-        Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relative_module_name: DiagnosticMessage;
-        Import_declaration_conflicts_with_local_declaration_of_0: DiagnosticMessage;
-        Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module: DiagnosticMessage;
-        Types_have_separate_declarations_of_a_private_property_0: DiagnosticMessage;
-        Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2: DiagnosticMessage;
-        Property_0_is_protected_in_type_1_but_public_in_type_2: DiagnosticMessage;
-        Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses: DiagnosticMessage;
-        Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1: DiagnosticMessage;
-        The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead: DiagnosticMessage;
-        Block_scoped_variable_0_used_before_its_declaration: DiagnosticMessage;
-        Class_0_used_before_its_declaration: DiagnosticMessage;
-        Enum_0_used_before_its_declaration: DiagnosticMessage;
-        Cannot_redeclare_block_scoped_variable_0: DiagnosticMessage;
-        An_enum_member_cannot_have_a_numeric_name: DiagnosticMessage;
-        The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_type_arguments_explicitly: DiagnosticMessage;
-        Variable_0_is_used_before_being_assigned: DiagnosticMessage;
-        Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0: DiagnosticMessage;
-        Type_alias_0_circularly_references_itself: DiagnosticMessage;
-        Type_alias_name_cannot_be_0: DiagnosticMessage;
-        An_AMD_module_cannot_have_multiple_name_assignments: DiagnosticMessage;
-        Type_0_has_no_property_1_and_no_string_index_signature: DiagnosticMessage;
-        Type_0_has_no_property_1: DiagnosticMessage;
-        Type_0_is_not_an_array_type: DiagnosticMessage;
-        A_rest_element_must_be_last_in_a_destructuring_pattern: DiagnosticMessage;
-        A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature: DiagnosticMessage;
-        A_computed_property_name_must_be_of_type_string_number_symbol_or_any: DiagnosticMessage;
-        this_cannot_be_referenced_in_a_computed_property_name: DiagnosticMessage;
-        super_cannot_be_referenced_in_a_computed_property_name: DiagnosticMessage;
-        A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type: DiagnosticMessage;
-        Cannot_find_global_value_0: DiagnosticMessage;
-        The_0_operator_cannot_be_applied_to_type_symbol: DiagnosticMessage;
-        Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object: DiagnosticMessage;
-        A_computed_property_name_of_the_form_0_must_be_of_type_symbol: DiagnosticMessage;
-        Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher: DiagnosticMessage;
-        Enum_declarations_must_all_be_const_or_non_const: DiagnosticMessage;
-        In_const_enum_declarations_member_initializer_must_be_constant_expression: DiagnosticMessage;
-        const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_import_declaration_or_export_assignment_or_type_query: DiagnosticMessage;
-        A_const_enum_member_can_only_be_accessed_using_a_string_literal: DiagnosticMessage;
-        const_enum_member_initializer_was_evaluated_to_a_non_finite_value: DiagnosticMessage;
-        const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN: DiagnosticMessage;
-        Property_0_does_not_exist_on_const_enum_1: DiagnosticMessage;
-        let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations: DiagnosticMessage;
-        Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1: DiagnosticMessage;
-        The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation: DiagnosticMessage;
-        Export_declaration_conflicts_with_exported_declaration_of_0: DiagnosticMessage;
-        The_left_hand_side_of_a_for_of_statement_must_be_a_variable_or_a_property_access: DiagnosticMessage;
-        Type_0_must_have_a_Symbol_iterator_method_that_returns_an_iterator: DiagnosticMessage;
-        An_iterator_must_have_a_next_method: DiagnosticMessage;
-        The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property: DiagnosticMessage;
-        The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern: DiagnosticMessage;
-        Cannot_redeclare_identifier_0_in_catch_clause: DiagnosticMessage;
-        Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2: DiagnosticMessage;
-        Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher: DiagnosticMessage;
-        Type_0_is_not_an_array_type_or_a_string_type: DiagnosticMessage;
-        The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_standard_function_expression: DiagnosticMessage;
-        Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct: DiagnosticMessage;
-        Module_0_uses_export_and_cannot_be_used_with_export_Asterisk: DiagnosticMessage;
-        An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments: DiagnosticMessage;
-        A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments: DiagnosticMessage;
-        A_rest_element_cannot_contain_a_binding_pattern: DiagnosticMessage;
-        _0_is_referenced_directly_or_indirectly_in_its_own_type_annotation: DiagnosticMessage;
-        Cannot_find_namespace_0: DiagnosticMessage;
-        Type_0_must_have_a_Symbol_asyncIterator_method_that_returns_an_async_iterator: DiagnosticMessage;
-        A_generator_cannot_have_a_void_type_annotation: DiagnosticMessage;
-        _0_is_referenced_directly_or_indirectly_in_its_own_base_expression: DiagnosticMessage;
-        Type_0_is_not_a_constructor_function_type: DiagnosticMessage;
-        No_base_constructor_has_the_specified_number_of_type_arguments: DiagnosticMessage;
-        Base_constructor_return_type_0_is_not_a_class_or_interface_type: DiagnosticMessage;
-        Base_constructors_must_all_have_the_same_return_type: DiagnosticMessage;
-        Cannot_create_an_instance_of_an_abstract_class: DiagnosticMessage;
-        Overload_signatures_must_all_be_abstract_or_non_abstract: DiagnosticMessage;
-        Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression: DiagnosticMessage;
-        Classes_containing_abstract_methods_must_be_marked_abstract: DiagnosticMessage;
-        Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2: DiagnosticMessage;
-        All_declarations_of_an_abstract_method_must_be_consecutive: DiagnosticMessage;
-        Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type: DiagnosticMessage;
-        A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard: DiagnosticMessage;
-        An_async_iterator_must_have_a_next_method: DiagnosticMessage;
-        Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions: DiagnosticMessage;
-        Expression_resolves_to_variable_declaration_0_that_compiler_uses_to_support_async_functions: DiagnosticMessage;
-        The_arguments_object_cannot_be_referenced_in_an_async_function_or_method_in_ES3_and_ES5_Consider_using_a_standard_function_or_method: DiagnosticMessage;
-        yield_expressions_cannot_be_used_in_a_parameter_initializer: DiagnosticMessage;
-        await_expressions_cannot_be_used_in_a_parameter_initializer: DiagnosticMessage;
-        Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value: DiagnosticMessage;
-        A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface: DiagnosticMessage;
-        The_inferred_type_of_0_references_an_inaccessible_1_type_A_type_annotation_is_necessary: DiagnosticMessage;
-        A_module_cannot_have_multiple_default_exports: DiagnosticMessage;
-        Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_functions: DiagnosticMessage;
-        Property_0_is_incompatible_with_index_signature: DiagnosticMessage;
-        Object_is_possibly_null: DiagnosticMessage;
-        Object_is_possibly_undefined: DiagnosticMessage;
-        Object_is_possibly_null_or_undefined: DiagnosticMessage;
-        A_function_returning_never_cannot_have_a_reachable_end_point: DiagnosticMessage;
-        Enum_type_0_has_members_with_initializers_that_are_not_literals: DiagnosticMessage;
-        Type_0_cannot_be_used_to_index_type_1: DiagnosticMessage;
-        Type_0_has_no_matching_index_signature_for_type_1: DiagnosticMessage;
-        Type_0_cannot_be_used_as_an_index_type: DiagnosticMessage;
-        Cannot_assign_to_0_because_it_is_not_a_variable: DiagnosticMessage;
-        Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property: DiagnosticMessage;
-        The_target_of_an_assignment_must_be_a_variable_or_a_property_access: DiagnosticMessage;
-        Index_signature_in_type_0_only_permits_reading: DiagnosticMessage;
-        Duplicate_identifier_newTarget_Compiler_uses_variable_declaration_newTarget_to_capture_new_target_meta_property_reference: DiagnosticMessage;
-        Expression_resolves_to_variable_declaration_newTarget_that_compiler_uses_to_capture_new_target_meta_property_reference: DiagnosticMessage;
-        A_mixin_class_must_have_a_constructor_with_a_single_rest_parameter_of_type_any: DiagnosticMessage;
-        Property_0_has_conflicting_declarations_and_is_inaccessible_in_type_1: DiagnosticMessage;
-        The_type_returned_by_the_next_method_of_an_async_iterator_must_be_a_promise_for_a_type_with_a_value_property: DiagnosticMessage;
-        Type_0_is_not_an_array_type_or_does_not_have_a_Symbol_iterator_method_that_returns_an_iterator: DiagnosticMessage;
-        Type_0_is_not_an_array_type_or_a_string_type_or_does_not_have_a_Symbol_iterator_method_that_returns_an_iterator: DiagnosticMessage;
-        Generic_type_instantiation_is_excessively_deep_and_possibly_infinite: DiagnosticMessage;
-        Property_0_does_not_exist_on_type_1_Did_you_mean_2: DiagnosticMessage;
-        Cannot_find_name_0_Did_you_mean_1: DiagnosticMessage;
-        Computed_values_are_not_permitted_in_an_enum_with_string_valued_members: DiagnosticMessage;
-        Expected_0_arguments_but_got_1: DiagnosticMessage;
-        Expected_at_least_0_arguments_but_got_1: DiagnosticMessage;
-        Expected_0_arguments_but_got_1_or_more: DiagnosticMessage;
-        Expected_at_least_0_arguments_but_got_1_or_more: DiagnosticMessage;
-        Expected_0_type_arguments_but_got_1: DiagnosticMessage;
-        Type_0_has_no_properties_in_common_with_type_1: DiagnosticMessage;
-        Value_of_type_0_has_no_properties_in_common_with_type_1_Did_you_mean_to_call_it: DiagnosticMessage;
-        Object_literal_may_only_specify_known_properties_but_0_does_not_exist_in_type_1_Did_you_mean_to_write_2: DiagnosticMessage;
-        Base_class_expressions_cannot_reference_class_type_parameters: DiagnosticMessage;
-        The_containing_function_or_module_body_is_too_large_for_control_flow_analysis: DiagnosticMessage;
-        Property_0_has_no_initializer_and_is_not_definitely_assigned_in_the_constructor: DiagnosticMessage;
-        Property_0_is_used_before_being_assigned: DiagnosticMessage;
-        A_rest_element_cannot_have_a_property_name: DiagnosticMessage;
-        Enum_declarations_can_only_merge_with_namespace_or_other_enum_declarations: DiagnosticMessage;
-        Type_0_is_not_an_array_type_Use_compiler_option_downlevelIteration_to_allow_iterating_of_iterators: DiagnosticMessage;
-        Type_0_is_not_an_array_type_or_a_string_type_Use_compiler_option_downlevelIteration_to_allow_iterating_of_iterators: DiagnosticMessage;
-        Property_0_does_not_exist_on_type_1_Did_you_forget_to_use_await: DiagnosticMessage;
-        Object_is_of_type_unknown: DiagnosticMessage;
-        JSX_element_attributes_type_0_may_not_be_a_union_type: DiagnosticMessage;
-        The_return_type_of_a_JSX_element_constructor_must_return_an_object_type: DiagnosticMessage;
-        JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist: DiagnosticMessage;
-        Property_0_in_type_1_is_not_assignable_to_type_2: DiagnosticMessage;
-        JSX_element_type_0_does_not_have_any_construct_or_call_signatures: DiagnosticMessage;
-        JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements: DiagnosticMessage;
-        Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property: DiagnosticMessage;
-        JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property: DiagnosticMessage;
-        The_global_type_JSX_0_may_not_have_more_than_one_property: DiagnosticMessage;
-        JSX_spread_child_must_be_an_array_type: DiagnosticMessage;
-        Cannot_augment_module_0_with_value_exports_because_it_resolves_to_a_non_module_entity: DiagnosticMessage;
-        A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums: DiagnosticMessage;
-        Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead: DiagnosticMessage;
-        Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1: DiagnosticMessage;
-        Exported_external_package_typings_file_cannot_contain_tripleslash_references_Please_contact_the_package_author_to_update_the_package_definition: DiagnosticMessage;
-        Exported_external_package_typings_file_0_is_not_a_module_Please_contact_the_package_author_to_update_the_package_definition: DiagnosticMessage;
-        JSX_expressions_must_have_one_parent_element: DiagnosticMessage;
-        Type_0_provides_no_match_for_the_signature_1: DiagnosticMessage;
-        super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_higher: DiagnosticMessage;
-        super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions: DiagnosticMessage;
-        Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module: DiagnosticMessage;
-        Cannot_find_name_0_Did_you_mean_the_static_member_1_0: DiagnosticMessage;
-        Cannot_find_name_0_Did_you_mean_the_instance_member_this_0: DiagnosticMessage;
-        Invalid_module_name_in_augmentation_module_0_cannot_be_found: DiagnosticMessage;
-        Invalid_module_name_in_augmentation_Module_0_resolves_to_an_untyped_module_at_1_which_cannot_be_augmented: DiagnosticMessage;
-        Exports_and_export_assignments_are_not_permitted_in_module_augmentations: DiagnosticMessage;
-        Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_module: DiagnosticMessage;
-        export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always_visible: DiagnosticMessage;
-        Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations: DiagnosticMessage;
-        Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambient_context: DiagnosticMessage;
-        Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity: DiagnosticMessage;
-        Cannot_assign_a_0_constructor_type_to_a_1_constructor_type: DiagnosticMessage;
-        Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration: DiagnosticMessage;
-        Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration: DiagnosticMessage;
-        Cannot_extend_a_class_0_Class_constructor_is_marked_as_private: DiagnosticMessage;
-        Accessors_must_both_be_abstract_or_non_abstract: DiagnosticMessage;
-        A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type: DiagnosticMessage;
-        Type_0_is_not_comparable_to_type_1: DiagnosticMessage;
-        A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void: DiagnosticMessage;
-        A_0_parameter_must_be_the_first_parameter: DiagnosticMessage;
-        A_constructor_cannot_have_a_this_parameter: DiagnosticMessage;
-        get_and_set_accessor_must_have_the_same_this_type: DiagnosticMessage;
-        this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation: DiagnosticMessage;
-        The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1: DiagnosticMessage;
-        The_this_types_of_each_signature_are_incompatible: DiagnosticMessage;
-        _0_refers_to_a_UMD_global_but_the_current_file_is_a_module_Consider_adding_an_import_instead: DiagnosticMessage;
-        All_declarations_of_0_must_have_identical_modifiers: DiagnosticMessage;
-        Cannot_find_type_definition_file_for_0: DiagnosticMessage;
-        Cannot_extend_an_interface_0_Did_you_mean_implements: DiagnosticMessage;
-        An_import_path_cannot_end_with_a_0_extension_Consider_importing_1_instead: DiagnosticMessage;
-        _0_is_a_primitive_but_1_is_a_wrapper_object_Prefer_using_0_when_possible: DiagnosticMessage;
-        _0_only_refers_to_a_type_but_is_being_used_as_a_value_here: DiagnosticMessage;
-        Namespace_0_has_no_exported_member_1: DiagnosticMessage;
-        Left_side_of_comma_operator_is_unused_and_has_no_side_effects: DiagnosticMessage;
-        The_Object_type_is_assignable_to_very_few_other_types_Did_you_mean_to_use_the_any_type_instead: DiagnosticMessage;
-        An_async_function_or_method_must_return_a_Promise_Make_sure_you_have_a_declaration_for_Promise_or_include_ES2015_in_your_lib_option: DiagnosticMessage;
-        Spread_types_may_only_be_created_from_object_types: DiagnosticMessage;
-        Static_property_0_conflicts_with_built_in_property_Function_0_of_constructor_function_1: DiagnosticMessage;
-        Rest_types_may_only_be_created_from_object_types: DiagnosticMessage;
-        The_target_of_an_object_rest_assignment_must_be_a_variable_or_a_property_access: DiagnosticMessage;
-        _0_only_refers_to_a_type_but_is_being_used_as_a_namespace_here: DiagnosticMessage;
-        The_operand_of_a_delete_operator_must_be_a_property_reference: DiagnosticMessage;
-        The_operand_of_a_delete_operator_cannot_be_a_read_only_property: DiagnosticMessage;
-        An_async_function_or_method_in_ES5_SlashES3_requires_the_Promise_constructor_Make_sure_you_have_a_declaration_for_the_Promise_constructor_or_include_ES2015_in_your_lib_option: DiagnosticMessage;
-        Required_type_parameters_may_not_follow_optional_type_parameters: DiagnosticMessage;
-        Generic_type_0_requires_between_1_and_2_type_arguments: DiagnosticMessage;
-        Cannot_use_namespace_0_as_a_value: DiagnosticMessage;
-        Cannot_use_namespace_0_as_a_type: DiagnosticMessage;
-        _0_are_specified_twice_The_attribute_named_0_will_be_overwritten: DiagnosticMessage;
-        A_dynamic_import_call_returns_a_Promise_Make_sure_you_have_a_declaration_for_Promise_or_include_ES2015_in_your_lib_option: DiagnosticMessage;
-        A_dynamic_import_call_in_ES5_SlashES3_requires_the_Promise_constructor_Make_sure_you_have_a_declaration_for_the_Promise_constructor_or_include_ES2015_in_your_lib_option: DiagnosticMessage;
-        Cannot_access_0_1_because_0_is_a_type_but_not_a_namespace_Did_you_mean_to_retrieve_the_type_of_the_property_1_in_0_with_0_1: DiagnosticMessage;
-        The_expression_of_an_export_assignment_must_be_an_identifier_or_qualified_name_in_an_ambient_context: DiagnosticMessage;
-        Abstract_property_0_in_class_1_cannot_be_accessed_in_the_constructor: DiagnosticMessage;
-        Type_parameter_0_has_a_circular_default: DiagnosticMessage;
-        Subsequent_property_declarations_must_have_the_same_type_Property_0_must_be_of_type_1_but_here_has_type_2: DiagnosticMessage;
-        Duplicate_declaration_0: DiagnosticMessage;
-        Type_0_is_not_assignable_to_type_1_Two_different_types_with_this_name_exist_but_they_are_unrelated: DiagnosticMessage;
-        Class_0_incorrectly_implements_class_1_Did_you_mean_to_extend_1_and_inherit_its_members_as_a_subclass: DiagnosticMessage;
-        Cannot_invoke_an_object_which_is_possibly_null: DiagnosticMessage;
-        Cannot_invoke_an_object_which_is_possibly_undefined: DiagnosticMessage;
-        Cannot_invoke_an_object_which_is_possibly_null_or_undefined: DiagnosticMessage;
-        Module_0_has_no_exported_member_1_Did_you_mean_2: DiagnosticMessage;
-        Class_name_cannot_be_Object_when_targeting_ES5_with_module_0: DiagnosticMessage;
-        Cannot_find_lib_definition_for_0: DiagnosticMessage;
-        Cannot_find_lib_definition_for_0_Did_you_mean_1: DiagnosticMessage;
-        Import_declaration_0_is_using_private_name_1: DiagnosticMessage;
-        Type_parameter_0_of_exported_class_has_or_is_using_private_name_1: DiagnosticMessage;
-        Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1: DiagnosticMessage;
-        Type_parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1: DiagnosticMessage;
-        Type_parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1: DiagnosticMessage;
-        Type_parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1: DiagnosticMessage;
-        Type_parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1: DiagnosticMessage;
-        Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1: DiagnosticMessage;
-        Type_parameter_0_of_exported_function_has_or_is_using_private_name_1: DiagnosticMessage;
-        Implements_clause_of_exported_class_0_has_or_is_using_private_name_1: DiagnosticMessage;
-        extends_clause_of_exported_class_0_has_or_is_using_private_name_1: DiagnosticMessage;
-        extends_clause_of_exported_interface_0_has_or_is_using_private_name_1: DiagnosticMessage;
-        Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: DiagnosticMessage;
-        Exported_variable_0_has_or_is_using_name_1_from_private_module_2: DiagnosticMessage;
-        Exported_variable_0_has_or_is_using_private_name_1: DiagnosticMessage;
-        Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: DiagnosticMessage;
-        Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2: DiagnosticMessage;
-        Public_static_property_0_of_exported_class_has_or_is_using_private_name_1: DiagnosticMessage;
-        Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: DiagnosticMessage;
-        Public_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2: DiagnosticMessage;
-        Public_property_0_of_exported_class_has_or_is_using_private_name_1: DiagnosticMessage;
-        Property_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2: DiagnosticMessage;
-        Property_0_of_exported_interface_has_or_is_using_private_name_1: DiagnosticMessage;
-        Parameter_type_of_public_static_setter_0_from_exported_class_has_or_is_using_name_1_from_private_module_2: DiagnosticMessage;
-        Parameter_type_of_public_static_setter_0_from_exported_class_has_or_is_using_private_name_1: DiagnosticMessage;
-        Parameter_type_of_public_setter_0_from_exported_class_has_or_is_using_name_1_from_private_module_2: DiagnosticMessage;
-        Parameter_type_of_public_setter_0_from_exported_class_has_or_is_using_private_name_1: DiagnosticMessage;
-        Return_type_of_public_static_getter_0_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: DiagnosticMessage;
-        Return_type_of_public_static_getter_0_from_exported_class_has_or_is_using_name_1_from_private_module_2: DiagnosticMessage;
-        Return_type_of_public_static_getter_0_from_exported_class_has_or_is_using_private_name_1: DiagnosticMessage;
-        Return_type_of_public_getter_0_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: DiagnosticMessage;
-        Return_type_of_public_getter_0_from_exported_class_has_or_is_using_name_1_from_private_module_2: DiagnosticMessage;
-        Return_type_of_public_getter_0_from_exported_class_has_or_is_using_private_name_1: DiagnosticMessage;
-        Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: DiagnosticMessage;
-        Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_0: DiagnosticMessage;
-        Return_type_of_call_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: DiagnosticMessage;
-        Return_type_of_call_signature_from_exported_interface_has_or_is_using_private_name_0: DiagnosticMessage;
-        Return_type_of_index_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: DiagnosticMessage;
-        Return_type_of_index_signature_from_exported_interface_has_or_is_using_private_name_0: DiagnosticMessage;
-        Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: DiagnosticMessage;
-        Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_private_module_1: DiagnosticMessage;
-        Return_type_of_public_static_method_from_exported_class_has_or_is_using_private_name_0: DiagnosticMessage;
-        Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: DiagnosticMessage;
-        Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_private_module_1: DiagnosticMessage;
-        Return_type_of_public_method_from_exported_class_has_or_is_using_private_name_0: DiagnosticMessage;
-        Return_type_of_method_from_exported_interface_has_or_is_using_name_0_from_private_module_1: DiagnosticMessage;
-        Return_type_of_method_from_exported_interface_has_or_is_using_private_name_0: DiagnosticMessage;
-        Return_type_of_exported_function_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: DiagnosticMessage;
-        Return_type_of_exported_function_has_or_is_using_name_0_from_private_module_1: DiagnosticMessage;
-        Return_type_of_exported_function_has_or_is_using_private_name_0: DiagnosticMessage;
-        Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: DiagnosticMessage;
-        Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_private_module_2: DiagnosticMessage;
-        Parameter_0_of_constructor_from_exported_class_has_or_is_using_private_name_1: DiagnosticMessage;
-        Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2: DiagnosticMessage;
-        Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1: DiagnosticMessage;
-        Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2: DiagnosticMessage;
-        Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1: DiagnosticMessage;
-        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: DiagnosticMessage;
-        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_private_module_2: DiagnosticMessage;
-        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1: DiagnosticMessage;
-        Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: DiagnosticMessage;
-        Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_private_module_2: DiagnosticMessage;
-        Parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1: DiagnosticMessage;
-        Parameter_0_of_method_from_exported_interface_has_or_is_using_name_1_from_private_module_2: DiagnosticMessage;
-        Parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1: DiagnosticMessage;
-        Parameter_0_of_exported_function_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: DiagnosticMessage;
-        Parameter_0_of_exported_function_has_or_is_using_name_1_from_private_module_2: DiagnosticMessage;
-        Parameter_0_of_exported_function_has_or_is_using_private_name_1: DiagnosticMessage;
-        Exported_type_alias_0_has_or_is_using_private_name_1: DiagnosticMessage;
-        Default_export_of_the_module_has_or_is_using_private_name_0: DiagnosticMessage;
-        Type_parameter_0_of_exported_type_alias_has_or_is_using_private_name_1: DiagnosticMessage;
-        Conflicting_definitions_for_0_found_at_1_and_2_Consider_installing_a_specific_version_of_this_library_to_resolve_the_conflict: DiagnosticMessage;
-        Parameter_0_of_index_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2: DiagnosticMessage;
-        Parameter_0_of_index_signature_from_exported_interface_has_or_is_using_private_name_1: DiagnosticMessage;
-        Property_0_of_exported_class_expression_may_not_be_private_or_protected: DiagnosticMessage;
-        Public_static_method_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: DiagnosticMessage;
-        Public_static_method_0_of_exported_class_has_or_is_using_name_1_from_private_module_2: DiagnosticMessage;
-        Public_static_method_0_of_exported_class_has_or_is_using_private_name_1: DiagnosticMessage;
-        Public_method_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: DiagnosticMessage;
-        Public_method_0_of_exported_class_has_or_is_using_name_1_from_private_module_2: DiagnosticMessage;
-        Public_method_0_of_exported_class_has_or_is_using_private_name_1: DiagnosticMessage;
-        Method_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2: DiagnosticMessage;
-        Method_0_of_exported_interface_has_or_is_using_private_name_1: DiagnosticMessage;
-        The_current_host_does_not_support_the_0_option: DiagnosticMessage;
-        Cannot_find_the_common_subdirectory_path_for_the_input_files: DiagnosticMessage;
-        File_specification_cannot_end_in_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0: DiagnosticMessage;
-        Cannot_read_file_0_Colon_1: DiagnosticMessage;
-        Failed_to_parse_file_0_Colon_1: DiagnosticMessage;
-        Unknown_compiler_option_0: DiagnosticMessage;
-        Compiler_option_0_requires_a_value_of_type_1: DiagnosticMessage;
-        Could_not_write_file_0_Colon_1: DiagnosticMessage;
-        Option_project_cannot_be_mixed_with_source_files_on_a_command_line: DiagnosticMessage;
-        Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES2015_or_higher: DiagnosticMessage;
-        Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided: DiagnosticMessage;
-        Option_0_cannot_be_specified_without_specifying_option_1: DiagnosticMessage;
-        Option_0_cannot_be_specified_with_option_1: DiagnosticMessage;
-        A_tsconfig_json_file_is_already_defined_at_Colon_0: DiagnosticMessage;
-        Cannot_write_file_0_because_it_would_overwrite_input_file: DiagnosticMessage;
-        Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files: DiagnosticMessage;
-        Cannot_find_a_tsconfig_json_file_at_the_specified_directory_Colon_0: DiagnosticMessage;
-        The_specified_path_does_not_exist_Colon_0: DiagnosticMessage;
-        Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier: DiagnosticMessage;
-        Option_paths_cannot_be_used_without_specifying_baseUrl_option: DiagnosticMessage;
-        Pattern_0_can_have_at_most_one_Asterisk_character: DiagnosticMessage;
-        Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character: DiagnosticMessage;
-        Substitutions_for_pattern_0_should_be_an_array: DiagnosticMessage;
-        Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2: DiagnosticMessage;
-        File_specification_cannot_contain_a_parent_directory_that_appears_after_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0: DiagnosticMessage;
-        Substitutions_for_pattern_0_shouldn_t_be_an_empty_array: DiagnosticMessage;
-        Invalid_value_for_jsxFactory_0_is_not_a_valid_identifier_or_qualified_name: DiagnosticMessage;
-        Adding_a_tsconfig_json_file_will_help_organize_projects_that_contain_both_TypeScript_and_JavaScript_files_Learn_more_at_https_Colon_Slash_Slashaka_ms_Slashtsconfig: DiagnosticMessage;
-        Option_0_cannot_be_specified_without_specifying_option_1_or_option_2: DiagnosticMessage;
-        Option_resolveJsonModule_cannot_be_specified_without_node_module_resolution_strategy: DiagnosticMessage;
-        Generates_a_sourcemap_for_each_corresponding_d_ts_file: DiagnosticMessage;
-        Concatenate_and_emit_output_to_single_file: DiagnosticMessage;
-        Generates_corresponding_d_ts_file: DiagnosticMessage;
-        Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations: DiagnosticMessage;
-        Specify_the_location_where_debugger_should_locate_TypeScript_files_instead_of_source_locations: DiagnosticMessage;
-        Watch_input_files: DiagnosticMessage;
-        Redirect_output_structure_to_the_directory: DiagnosticMessage;
-        Do_not_erase_const_enum_declarations_in_generated_code: DiagnosticMessage;
-        Do_not_emit_outputs_if_any_errors_were_reported: DiagnosticMessage;
-        Do_not_emit_comments_to_output: DiagnosticMessage;
-        Do_not_emit_outputs: DiagnosticMessage;
-        Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typechecking: DiagnosticMessage;
-        Skip_type_checking_of_declaration_files: DiagnosticMessage;
-        Do_not_resolve_the_real_path_of_symlinks: DiagnosticMessage;
-        Only_emit_d_ts_declaration_files: DiagnosticMessage;
-        Specify_ECMAScript_target_version_Colon_ES3_default_ES5_ES2015_ES2016_ES2017_ES2018_or_ESNEXT: DiagnosticMessage;
-        Specify_module_code_generation_Colon_none_commonjs_amd_system_umd_es2015_or_ESNext: DiagnosticMessage;
-        Print_this_message: DiagnosticMessage;
-        Print_the_compiler_s_version: DiagnosticMessage;
-        Compile_the_project_given_the_path_to_its_configuration_file_or_to_a_folder_with_a_tsconfig_json: DiagnosticMessage;
-        Syntax_Colon_0: DiagnosticMessage;
-        options: DiagnosticMessage;
-        file: DiagnosticMessage;
-        Examples_Colon_0: DiagnosticMessage;
-        Options_Colon: DiagnosticMessage;
-        Version_0: DiagnosticMessage;
-        Insert_command_line_options_and_files_from_a_file: DiagnosticMessage;
-        Starting_compilation_in_watch_mode: DiagnosticMessage;
-        File_change_detected_Starting_incremental_compilation: DiagnosticMessage;
-        KIND: DiagnosticMessage;
-        FILE: DiagnosticMessage;
-        VERSION: DiagnosticMessage;
-        LOCATION: DiagnosticMessage;
-        DIRECTORY: DiagnosticMessage;
-        STRATEGY: DiagnosticMessage;
-        FILE_OR_DIRECTORY: DiagnosticMessage;
-        Generates_corresponding_map_file: DiagnosticMessage;
-        Compiler_option_0_expects_an_argument: DiagnosticMessage;
-        Unterminated_quoted_string_in_response_file_0: DiagnosticMessage;
-        Argument_for_0_option_must_be_Colon_1: DiagnosticMessage;
-        Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1: DiagnosticMessage;
-        Unsupported_locale_0: DiagnosticMessage;
-        Unable_to_open_file_0: DiagnosticMessage;
-        Corrupted_locale_file_0: DiagnosticMessage;
-        Raise_error_on_expressions_and_declarations_with_an_implied_any_type: DiagnosticMessage;
-        File_0_not_found: DiagnosticMessage;
-        File_0_has_unsupported_extension_The_only_supported_extensions_are_1: DiagnosticMessage;
-        Suppress_noImplicitAny_errors_for_indexing_objects_lacking_index_signatures: DiagnosticMessage;
-        Do_not_emit_declarations_for_code_that_has_an_internal_annotation: DiagnosticMessage;
-        Specify_the_root_directory_of_input_files_Use_to_control_the_output_directory_structure_with_outDir: DiagnosticMessage;
-        File_0_is_not_under_rootDir_1_rootDir_is_expected_to_contain_all_source_files: DiagnosticMessage;
-        Specify_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix: DiagnosticMessage;
-        NEWLINE: DiagnosticMessage;
-        Option_0_can_only_be_specified_in_tsconfig_json_file: DiagnosticMessage;
-        Enables_experimental_support_for_ES7_decorators: DiagnosticMessage;
-        Enables_experimental_support_for_emitting_type_metadata_for_decorators: DiagnosticMessage;
-        Enables_experimental_support_for_ES7_async_functions: DiagnosticMessage;
-        Specify_module_resolution_strategy_Colon_node_Node_js_or_classic_TypeScript_pre_1_6: DiagnosticMessage;
-        Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file: DiagnosticMessage;
-        Successfully_created_a_tsconfig_json_file: DiagnosticMessage;
-        Suppress_excess_property_checks_for_object_literals: DiagnosticMessage;
-        Stylize_errors_and_messages_using_color_and_context_experimental: DiagnosticMessage;
-        Do_not_report_errors_on_unused_labels: DiagnosticMessage;
-        Report_error_when_not_all_code_paths_in_function_return_a_value: DiagnosticMessage;
-        Report_errors_for_fallthrough_cases_in_switch_statement: DiagnosticMessage;
-        Do_not_report_errors_on_unreachable_code: DiagnosticMessage;
-        Disallow_inconsistently_cased_references_to_the_same_file: DiagnosticMessage;
-        Specify_library_files_to_be_included_in_the_compilation: DiagnosticMessage;
-        Specify_JSX_code_generation_Colon_preserve_react_native_or_react: DiagnosticMessage;
-        File_0_has_an_unsupported_extension_so_skipping_it: DiagnosticMessage;
-        Only_amd_and_system_modules_are_supported_alongside_0: DiagnosticMessage;
-        Base_directory_to_resolve_non_absolute_module_names: DiagnosticMessage;
-        Deprecated_Use_jsxFactory_instead_Specify_the_object_invoked_for_createElement_when_targeting_react_JSX_emit: DiagnosticMessage;
-        Enable_tracing_of_the_name_resolution_process: DiagnosticMessage;
-        Resolving_module_0_from_1: DiagnosticMessage;
-        Explicitly_specified_module_resolution_kind_Colon_0: DiagnosticMessage;
-        Module_resolution_kind_is_not_specified_using_0: DiagnosticMessage;
-        Module_name_0_was_successfully_resolved_to_1: DiagnosticMessage;
-        Module_name_0_was_not_resolved: DiagnosticMessage;
-        paths_option_is_specified_looking_for_a_pattern_to_match_module_name_0: DiagnosticMessage;
-        Module_name_0_matched_pattern_1: DiagnosticMessage;
-        Trying_substitution_0_candidate_module_location_Colon_1: DiagnosticMessage;
-        Resolving_module_name_0_relative_to_base_url_1_2: DiagnosticMessage;
-        Loading_module_as_file_Slash_folder_candidate_module_location_0_target_file_type_1: DiagnosticMessage;
-        File_0_does_not_exist: DiagnosticMessage;
-        File_0_exist_use_it_as_a_name_resolution_result: DiagnosticMessage;
-        Loading_module_0_from_node_modules_folder_target_file_type_1: DiagnosticMessage;
-        Found_package_json_at_0: DiagnosticMessage;
-        package_json_does_not_have_a_0_field: DiagnosticMessage;
-        package_json_has_0_field_1_that_references_2: DiagnosticMessage;
-        Allow_javascript_files_to_be_compiled: DiagnosticMessage;
-        Option_0_should_have_array_of_strings_as_a_value: DiagnosticMessage;
-        Checking_if_0_is_the_longest_matching_prefix_for_1_2: DiagnosticMessage;
-        Expected_type_of_0_field_in_package_json_to_be_string_got_1: DiagnosticMessage;
-        baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1: DiagnosticMessage;
-        rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0: DiagnosticMessage;
-        Longest_matching_prefix_for_0_is_1: DiagnosticMessage;
-        Loading_0_from_the_root_dir_1_candidate_location_2: DiagnosticMessage;
-        Trying_other_entries_in_rootDirs: DiagnosticMessage;
-        Module_resolution_using_rootDirs_has_failed: DiagnosticMessage;
-        Do_not_emit_use_strict_directives_in_module_output: DiagnosticMessage;
-        Enable_strict_null_checks: DiagnosticMessage;
-        Unknown_option_excludes_Did_you_mean_exclude: DiagnosticMessage;
-        Raise_error_on_this_expressions_with_an_implied_any_type: DiagnosticMessage;
-        Resolving_type_reference_directive_0_containing_file_1_root_directory_2: DiagnosticMessage;
-        Resolving_using_primary_search_paths: DiagnosticMessage;
-        Resolving_from_node_modules_folder: DiagnosticMessage;
-        Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2: DiagnosticMessage;
-        Type_reference_directive_0_was_not_resolved: DiagnosticMessage;
-        Resolving_with_primary_search_path_0: DiagnosticMessage;
-        Root_directory_cannot_be_determined_skipping_primary_search_paths: DiagnosticMessage;
-        Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set: DiagnosticMessage;
-        Type_declaration_files_to_be_included_in_compilation: DiagnosticMessage;
-        Looking_up_in_node_modules_folder_initial_location_0: DiagnosticMessage;
-        Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_modules_folder: DiagnosticMessage;
-        Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1: DiagnosticMessage;
-        Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set: DiagnosticMessage;
-        Resolving_real_path_for_0_result_1: DiagnosticMessage;
-        Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system: DiagnosticMessage;
-        File_name_0_has_a_1_extension_stripping_it: DiagnosticMessage;
-        _0_is_declared_but_its_value_is_never_read: DiagnosticMessage;
-        Report_errors_on_unused_locals: DiagnosticMessage;
-        Report_errors_on_unused_parameters: DiagnosticMessage;
-        The_maximum_dependency_depth_to_search_under_node_modules_and_load_JavaScript_files: DiagnosticMessage;
-        Cannot_import_type_declaration_files_Consider_importing_0_instead_of_1: DiagnosticMessage;
-        Property_0_is_declared_but_its_value_is_never_read: DiagnosticMessage;
-        Import_emit_helpers_from_tslib: DiagnosticMessage;
-        Auto_discovery_for_typings_is_enabled_in_project_0_Running_extra_resolution_pass_for_module_1_using_cache_location_2: DiagnosticMessage;
-        Parse_in_strict_mode_and_emit_use_strict_for_each_source_file: DiagnosticMessage;
-        Module_0_was_resolved_to_1_but_jsx_is_not_set: DiagnosticMessage;
-        Module_0_was_resolved_as_locally_declared_ambient_module_in_file_1: DiagnosticMessage;
-        Module_0_was_resolved_as_ambient_module_declared_in_1_since_this_file_was_not_modified: DiagnosticMessage;
-        Specify_the_JSX_factory_function_to_use_when_targeting_react_JSX_emit_e_g_React_createElement_or_h: DiagnosticMessage;
-        Resolution_for_module_0_was_found_in_cache_from_location_1: DiagnosticMessage;
-        Directory_0_does_not_exist_skipping_all_lookups_in_it: DiagnosticMessage;
-        Show_diagnostic_information: DiagnosticMessage;
-        Show_verbose_diagnostic_information: DiagnosticMessage;
-        Emit_a_single_file_with_source_maps_instead_of_having_a_separate_file: DiagnosticMessage;
-        Emit_the_source_alongside_the_sourcemaps_within_a_single_file_requires_inlineSourceMap_or_sourceMap_to_be_set: DiagnosticMessage;
-        Transpile_each_file_as_a_separate_module_similar_to_ts_transpileModule: DiagnosticMessage;
-        Print_names_of_generated_files_part_of_the_compilation: DiagnosticMessage;
-        Print_names_of_files_part_of_the_compilation: DiagnosticMessage;
-        The_locale_used_when_displaying_messages_to_the_user_e_g_en_us: DiagnosticMessage;
-        Do_not_generate_custom_helper_functions_like_extends_in_compiled_output: DiagnosticMessage;
-        Do_not_include_the_default_library_file_lib_d_ts: DiagnosticMessage;
-        Do_not_add_triple_slash_references_or_imported_modules_to_the_list_of_compiled_files: DiagnosticMessage;
-        Deprecated_Use_skipLibCheck_instead_Skip_type_checking_of_default_library_declaration_files: DiagnosticMessage;
-        List_of_folders_to_include_type_definitions_from: DiagnosticMessage;
-        Disable_size_limitations_on_JavaScript_projects: DiagnosticMessage;
-        The_character_set_of_the_input_files: DiagnosticMessage;
-        Emit_a_UTF_8_Byte_Order_Mark_BOM_in_the_beginning_of_output_files: DiagnosticMessage;
-        Do_not_truncate_error_messages: DiagnosticMessage;
-        Output_directory_for_generated_declaration_files: DiagnosticMessage;
-        A_series_of_entries_which_re_map_imports_to_lookup_locations_relative_to_the_baseUrl: DiagnosticMessage;
-        List_of_root_folders_whose_combined_content_represents_the_structure_of_the_project_at_runtime: DiagnosticMessage;
-        Show_all_compiler_options: DiagnosticMessage;
-        Deprecated_Use_outFile_instead_Concatenate_and_emit_output_to_single_file: DiagnosticMessage;
-        Command_line_Options: DiagnosticMessage;
-        Basic_Options: DiagnosticMessage;
-        Strict_Type_Checking_Options: DiagnosticMessage;
-        Module_Resolution_Options: DiagnosticMessage;
-        Source_Map_Options: DiagnosticMessage;
-        Additional_Checks: DiagnosticMessage;
-        Experimental_Options: DiagnosticMessage;
-        Advanced_Options: DiagnosticMessage;
-        Provide_full_support_for_iterables_in_for_of_spread_and_destructuring_when_targeting_ES5_or_ES3: DiagnosticMessage;
-        Enable_all_strict_type_checking_options: DiagnosticMessage;
-        List_of_language_service_plugins: DiagnosticMessage;
-        Scoped_package_detected_looking_in_0: DiagnosticMessage;
-        Reusing_resolution_of_module_0_to_file_1_from_old_program: DiagnosticMessage;
-        Reusing_module_resolutions_originating_in_0_since_resolutions_are_unchanged_from_old_program: DiagnosticMessage;
-        Disable_strict_checking_of_generic_signatures_in_function_types: DiagnosticMessage;
-        Enable_strict_checking_of_function_types: DiagnosticMessage;
-        Enable_strict_checking_of_property_initialization_in_classes: DiagnosticMessage;
-        Numeric_separators_are_not_allowed_here: DiagnosticMessage;
-        Multiple_consecutive_numeric_separators_are_not_permitted: DiagnosticMessage;
-        Found_package_json_at_0_Package_ID_is_1: DiagnosticMessage;
-        Whether_to_keep_outdated_console_output_in_watch_mode_instead_of_clearing_the_screen: DiagnosticMessage;
-        All_imports_in_import_declaration_are_unused: DiagnosticMessage;
-        Found_1_error_Watching_for_file_changes: DiagnosticMessage;
-        Found_0_errors_Watching_for_file_changes: DiagnosticMessage;
-        Resolve_keyof_to_string_valued_property_names_only_no_numbers_or_symbols: DiagnosticMessage;
-        _0_is_declared_but_never_used: DiagnosticMessage;
-        Include_modules_imported_with_json_extension: DiagnosticMessage;
-        All_destructured_elements_are_unused: DiagnosticMessage;
-        All_variables_are_unused: DiagnosticMessage;
-        Projects_to_reference: DiagnosticMessage;
-        Enable_project_compilation: DiagnosticMessage;
-        Project_references_may_not_form_a_circular_graph_Cycle_detected_Colon_0: DiagnosticMessage;
-        Composite_projects_may_not_disable_declaration_emit: DiagnosticMessage;
-        Output_file_0_has_not_been_built_from_source_file_1: DiagnosticMessage;
-        Referenced_project_0_must_have_setting_composite_Colon_true: DiagnosticMessage;
-        File_0_is_not_in_project_file_list_Projects_must_list_all_files_or_use_an_include_pattern: DiagnosticMessage;
-        Cannot_prepend_project_0_because_it_does_not_have_outFile_set: DiagnosticMessage;
-        Output_file_0_from_project_1_does_not_exist: DiagnosticMessage;
-        Project_0_is_out_of_date_because_oldest_output_1_is_older_than_newest_input_2: DiagnosticMessage;
-        Project_0_is_up_to_date_because_newest_input_1_is_older_than_oldest_output_2: DiagnosticMessage;
-        Project_0_is_out_of_date_because_output_file_1_does_not_exist: DiagnosticMessage;
-        Project_0_is_out_of_date_because_its_dependency_1_is_out_of_date: DiagnosticMessage;
-        Project_0_is_up_to_date_with_d_ts_files_from_its_dependencies: DiagnosticMessage;
-        Projects_in_this_build_Colon_0: DiagnosticMessage;
-        A_non_dry_build_would_delete_the_following_files_Colon_0: DiagnosticMessage;
-        A_non_dry_build_would_build_project_0: DiagnosticMessage;
-        Building_project_0: DiagnosticMessage;
-        Updating_output_timestamps_of_project_0: DiagnosticMessage;
-        delete_this_Project_0_is_up_to_date_because_it_was_previously_built: DiagnosticMessage;
-        Project_0_is_up_to_date: DiagnosticMessage;
-        Skipping_build_of_project_0_because_its_dependency_1_has_errors: DiagnosticMessage;
-        Project_0_can_t_be_built_because_its_dependency_1_has_errors: DiagnosticMessage;
-        Build_one_or_more_projects_and_their_dependencies_if_out_of_date: DiagnosticMessage;
-        Delete_the_outputs_of_all_projects: DiagnosticMessage;
-        Enable_verbose_logging: DiagnosticMessage;
-        Show_what_would_be_built_or_deleted_if_specified_with_clean: DiagnosticMessage;
-        Build_all_projects_including_those_that_appear_to_be_up_to_date: DiagnosticMessage;
-        Option_build_must_be_the_first_command_line_argument: DiagnosticMessage;
-        Options_0_and_1_cannot_be_combined: DiagnosticMessage;
-        Skipping_clean_because_not_all_projects_could_be_located: DiagnosticMessage;
-        Variable_0_implicitly_has_an_1_type: DiagnosticMessage;
-        Parameter_0_implicitly_has_an_1_type: DiagnosticMessage;
-        Member_0_implicitly_has_an_1_type: DiagnosticMessage;
-        new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type: DiagnosticMessage;
-        _0_which_lacks_return_type_annotation_implicitly_has_an_1_return_type: DiagnosticMessage;
-        Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type: DiagnosticMessage;
-        Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type: DiagnosticMessage;
-        Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number: DiagnosticMessage;
-        Could_not_find_a_declaration_file_for_module_0_1_implicitly_has_an_any_type: DiagnosticMessage;
-        Element_implicitly_has_an_any_type_because_type_0_has_no_index_signature: DiagnosticMessage;
-        Object_literal_s_property_0_implicitly_has_an_1_type: DiagnosticMessage;
-        Rest_parameter_0_implicitly_has_an_any_type: DiagnosticMessage;
-        Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type: DiagnosticMessage;
-        _0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or_indirectly_in_its_own_initializer: DiagnosticMessage;
-        _0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions: DiagnosticMessage;
-        Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions: DiagnosticMessage;
-        Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_type: DiagnosticMessage;
-        JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists: DiagnosticMessage;
-        Unreachable_code_detected: DiagnosticMessage;
-        Unused_label: DiagnosticMessage;
-        Fallthrough_case_in_switch: DiagnosticMessage;
-        Not_all_code_paths_return_a_value: DiagnosticMessage;
-        Binding_element_0_implicitly_has_an_1_type: DiagnosticMessage;
-        Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_parameter_type_annotation: DiagnosticMessage;
-        Property_0_implicitly_has_type_any_because_its_get_accessor_lacks_a_return_type_annotation: DiagnosticMessage;
-        Variable_0_implicitly_has_type_1_in_some_locations_where_its_type_cannot_be_determined: DiagnosticMessage;
-        Try_npm_install_types_Slash_0_if_it_exists_or_add_a_new_declaration_d_ts_file_containing_declare_module_0: DiagnosticMessage;
-        Dynamic_import_s_specifier_must_be_of_type_string_but_here_has_type_0: DiagnosticMessage;
-        Enables_emit_interoperability_between_CommonJS_and_ES_Modules_via_creation_of_namespace_objects_for_all_imports_Implies_allowSyntheticDefaultImports: DiagnosticMessage;
-        A_namespace_style_import_cannot_be_called_or_constructed_and_will_cause_a_failure_at_runtime: DiagnosticMessage;
-        Mapped_object_type_implicitly_has_an_any_template_type: DiagnosticMessage;
-        You_cannot_rename_this_element: DiagnosticMessage;
-        You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library: DiagnosticMessage;
-        import_can_only_be_used_in_a_ts_file: DiagnosticMessage;
-        export_can_only_be_used_in_a_ts_file: DiagnosticMessage;
-        type_parameter_declarations_can_only_be_used_in_a_ts_file: DiagnosticMessage;
-        implements_clauses_can_only_be_used_in_a_ts_file: DiagnosticMessage;
-        interface_declarations_can_only_be_used_in_a_ts_file: DiagnosticMessage;
-        module_declarations_can_only_be_used_in_a_ts_file: DiagnosticMessage;
-        type_aliases_can_only_be_used_in_a_ts_file: DiagnosticMessage;
-        _0_can_only_be_used_in_a_ts_file: DiagnosticMessage;
-        types_can_only_be_used_in_a_ts_file: DiagnosticMessage;
-        type_arguments_can_only_be_used_in_a_ts_file: DiagnosticMessage;
-        parameter_modifiers_can_only_be_used_in_a_ts_file: DiagnosticMessage;
-        non_null_assertions_can_only_be_used_in_a_ts_file: DiagnosticMessage;
-        enum_declarations_can_only_be_used_in_a_ts_file: DiagnosticMessage;
-        type_assertion_expressions_can_only_be_used_in_a_ts_file: DiagnosticMessage;
-        Octal_literal_types_must_use_ES2015_syntax_Use_the_syntax_0: DiagnosticMessage;
-        Octal_literals_are_not_allowed_in_enums_members_initializer_Use_the_syntax_0: DiagnosticMessage;
-        Report_errors_in_js_files: DiagnosticMessage;
-        JSDoc_types_can_only_be_used_inside_documentation_comments: DiagnosticMessage;
-        JSDoc_typedef_tag_should_either_have_a_type_annotation_or_be_followed_by_property_or_member_tags: DiagnosticMessage;
-        JSDoc_0_is_not_attached_to_a_class: DiagnosticMessage;
-        JSDoc_0_1_does_not_match_the_extends_2_clause: DiagnosticMessage;
-        JSDoc_param_tag_has_name_0_but_there_is_no_parameter_with_that_name: DiagnosticMessage;
-        Class_declarations_cannot_have_more_than_one_augments_or_extends_tag: DiagnosticMessage;
-        Expected_0_type_arguments_provide_these_with_an_extends_tag: DiagnosticMessage;
-        Expected_0_1_type_arguments_provide_these_with_an_extends_tag: DiagnosticMessage;
-        JSDoc_may_only_appear_in_the_last_parameter_of_a_signature: DiagnosticMessage;
-        JSDoc_param_tag_has_name_0_but_there_is_no_parameter_with_that_name_It_would_match_arguments_if_it_had_an_array_type: DiagnosticMessage;
-        Only_identifiers_Slashqualified_names_with_optional_type_arguments_are_currently_supported_in_a_class_extends_clause: DiagnosticMessage;
-        class_expressions_are_not_currently_supported: DiagnosticMessage;
-        Language_service_is_disabled: DiagnosticMessage;
-        JSX_attributes_must_only_be_assigned_a_non_empty_expression: DiagnosticMessage;
-        JSX_elements_cannot_have_multiple_attributes_with_the_same_name: DiagnosticMessage;
-        Expected_corresponding_JSX_closing_tag_for_0: DiagnosticMessage;
-        JSX_attribute_expected: DiagnosticMessage;
-        Cannot_use_JSX_unless_the_jsx_flag_is_provided: DiagnosticMessage;
-        A_constructor_cannot_contain_a_super_call_when_its_class_extends_null: DiagnosticMessage;
-        An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses: DiagnosticMessage;
-        A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses: DiagnosticMessage;
-        JSX_element_0_has_no_corresponding_closing_tag: DiagnosticMessage;
-        super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class: DiagnosticMessage;
-        Unknown_type_acquisition_option_0: DiagnosticMessage;
-        super_must_be_called_before_accessing_a_property_of_super_in_the_constructor_of_a_derived_class: DiagnosticMessage;
-        _0_is_not_a_valid_meta_property_for_keyword_1_Did_you_mean_2: DiagnosticMessage;
-        Meta_property_0_is_only_allowed_in_the_body_of_a_function_declaration_function_expression_or_constructor: DiagnosticMessage;
-        JSX_fragment_has_no_corresponding_closing_tag: DiagnosticMessage;
-        Expected_corresponding_closing_tag_for_JSX_fragment: DiagnosticMessage;
-        JSX_fragment_is_not_supported_when_using_jsxFactory: DiagnosticMessage;
-        JSX_fragment_is_not_supported_when_using_an_inline_JSX_factory_pragma: DiagnosticMessage;
-        Circularity_detected_while_resolving_configuration_Colon_0: DiagnosticMessage;
-        A_path_in_an_extends_option_must_be_relative_or_rooted_but_0_is_not: DiagnosticMessage;
-        The_files_list_in_config_file_0_is_empty: DiagnosticMessage;
-        No_inputs_were_found_in_config_file_0_Specified_include_paths_were_1_and_exclude_paths_were_2: DiagnosticMessage;
-        File_is_a_CommonJS_module_it_may_be_converted_to_an_ES6_module: DiagnosticMessage;
-        This_constructor_function_may_be_converted_to_a_class_declaration: DiagnosticMessage;
-        Import_may_be_converted_to_a_default_import: DiagnosticMessage;
-        JSDoc_types_may_be_moved_to_TypeScript_types: DiagnosticMessage;
-        require_call_may_be_converted_to_an_import: DiagnosticMessage;
-        Add_missing_super_call: DiagnosticMessage;
-        Make_super_call_the_first_statement_in_the_constructor: DiagnosticMessage;
-        Change_extends_to_implements: DiagnosticMessage;
-        Remove_declaration_for_Colon_0: DiagnosticMessage;
-        Remove_import_from_0: DiagnosticMessage;
-        Implement_interface_0: DiagnosticMessage;
-        Implement_inherited_abstract_class: DiagnosticMessage;
-        Add_0_to_unresolved_variable: DiagnosticMessage;
-        Remove_destructuring: DiagnosticMessage;
-        Remove_variable_statement: DiagnosticMessage;
-        Import_0_from_module_1: DiagnosticMessage;
-        Change_0_to_1: DiagnosticMessage;
-        Add_0_to_existing_import_declaration_from_1: DiagnosticMessage;
-        Declare_property_0: DiagnosticMessage;
-        Add_index_signature_for_property_0: DiagnosticMessage;
-        Disable_checking_for_this_file: DiagnosticMessage;
-        Ignore_this_error_message: DiagnosticMessage;
-        Initialize_property_0_in_the_constructor: DiagnosticMessage;
-        Initialize_static_property_0: DiagnosticMessage;
-        Change_spelling_to_0: DiagnosticMessage;
-        Declare_method_0: DiagnosticMessage;
-        Declare_static_method_0: DiagnosticMessage;
-        Prefix_0_with_an_underscore: DiagnosticMessage;
-        Rewrite_as_the_indexed_access_type_0: DiagnosticMessage;
-        Declare_static_property_0: DiagnosticMessage;
-        Call_decorator_expression: DiagnosticMessage;
-        Add_async_modifier_to_containing_function: DiagnosticMessage;
-        Convert_function_to_an_ES2015_class: DiagnosticMessage;
-        Convert_function_0_to_class: DiagnosticMessage;
-        Extract_to_0_in_1: DiagnosticMessage;
-        Extract_function: DiagnosticMessage;
-        Extract_constant: DiagnosticMessage;
-        Extract_to_0_in_enclosing_scope: DiagnosticMessage;
-        Extract_to_0_in_1_scope: DiagnosticMessage;
-        Annotate_with_type_from_JSDoc: DiagnosticMessage;
-        Annotate_with_types_from_JSDoc: DiagnosticMessage;
-        Infer_type_of_0_from_usage: DiagnosticMessage;
-        Infer_parameter_types_from_usage: DiagnosticMessage;
-        Convert_to_default_import: DiagnosticMessage;
-        Install_0: DiagnosticMessage;
-        Replace_import_with_0: DiagnosticMessage;
-        Use_synthetic_default_member: DiagnosticMessage;
-        Convert_to_ES6_module: DiagnosticMessage;
-        Add_undefined_type_to_property_0: DiagnosticMessage;
-        Add_initializer_to_property_0: DiagnosticMessage;
-        Add_definite_assignment_assertion_to_property_0: DiagnosticMessage;
-        Add_all_missing_members: DiagnosticMessage;
-        Infer_all_types_from_usage: DiagnosticMessage;
-        Delete_all_unused_declarations: DiagnosticMessage;
-        Prefix_all_unused_declarations_with_where_possible: DiagnosticMessage;
-        Fix_all_detected_spelling_errors: DiagnosticMessage;
-        Add_initializers_to_all_uninitialized_properties: DiagnosticMessage;
-        Add_definite_assignment_assertions_to_all_uninitialized_properties: DiagnosticMessage;
-        Add_undefined_type_to_all_uninitialized_properties: DiagnosticMessage;
-        Change_all_jsdoc_style_types_to_TypeScript: DiagnosticMessage;
-        Change_all_jsdoc_style_types_to_TypeScript_and_add_undefined_to_nullable_types: DiagnosticMessage;
-        Implement_all_unimplemented_interfaces: DiagnosticMessage;
-        Install_all_missing_types_packages: DiagnosticMessage;
-        Rewrite_all_as_indexed_access_types: DiagnosticMessage;
-        Convert_all_to_default_imports: DiagnosticMessage;
-        Make_all_super_calls_the_first_statement_in_their_constructor: DiagnosticMessage;
-        Add_qualifier_to_all_unresolved_variables_matching_a_member_name: DiagnosticMessage;
-        Change_all_extended_interfaces_to_implements: DiagnosticMessage;
-        Add_all_missing_super_calls: DiagnosticMessage;
-        Implement_all_inherited_abstract_classes: DiagnosticMessage;
-        Add_all_missing_async_modifiers: DiagnosticMessage;
-        Add_ts_ignore_to_all_error_messages: DiagnosticMessage;
-        Annotate_everything_with_types_from_JSDoc: DiagnosticMessage;
-        Add_to_all_uncalled_decorators: DiagnosticMessage;
-        Convert_all_constructor_functions_to_classes: DiagnosticMessage;
-        Generate_get_and_set_accessors: DiagnosticMessage;
-        Convert_require_to_import: DiagnosticMessage;
-        Convert_all_require_to_import: DiagnosticMessage;
-        Move_to_a_new_file: DiagnosticMessage;
-        Remove_unreachable_code: DiagnosticMessage;
-        Remove_all_unreachable_code: DiagnosticMessage;
-        Add_missing_typeof: DiagnosticMessage;
-        Remove_unused_label: DiagnosticMessage;
-        Remove_all_unused_labels: DiagnosticMessage;
-        Convert_0_to_mapped_object_type: DiagnosticMessage;
-        Convert_namespace_import_to_named_imports: DiagnosticMessage;
-        Convert_named_imports_to_namespace_import: DiagnosticMessage;
-        Add_or_remove_braces_in_an_arrow_function: DiagnosticMessage;
-        Add_braces_to_arrow_function: DiagnosticMessage;
-        Remove_braces_from_arrow_function: DiagnosticMessage;
-    };
-}
 declare namespace ts {
     type ErrorCallback = (message: DiagnosticMessage, length: number) => void;
-    function tokenIsIdentifierOrKeyword(token: SyntaxKind): boolean;
-    function tokenIsIdentifierOrKeywordOrGreaterThan(token: SyntaxKind): boolean;
     interface Scanner {
         getStartPos(): number;
         getToken(): SyntaxKind;
@@ -5931,7 +3072,6 @@ declare namespace ts {
         isIdentifier(): boolean;
         isReservedWord(): boolean;
         isUnterminated(): boolean;
-        getTokenFlags(): TokenFlags;
         reScanGreaterToken(): SyntaxKind;
         reScanSlashToken(): SyntaxKind;
         reScanTemplateToken(): SyntaxKind;
@@ -5951,25 +3091,14 @@ declare namespace ts {
         scanRange<T>(start: number, length: number, callback: () => T): T;
         tryScan<T>(callback: () => T): T;
     }
-    function isUnicodeIdentifierStart(code: number, languageVersion: ScriptTarget | undefined): boolean;
     function tokenToString(t: SyntaxKind): string | undefined;
-    function stringToToken(s: string): SyntaxKind | undefined;
-    function computeLineStarts(text: string): number[];
     function getPositionOfLineAndCharacter(sourceFile: SourceFileLike, line: number, character: number): number;
-    function computePositionOfLineAndCharacter(lineStarts: ReadonlyArray<number>, line: number, character: number, debugText?: string): number;
-    function getLineStarts(sourceFile: SourceFileLike): ReadonlyArray<number>;
-    /**
-     * We assume the first line starts at position 0 and 'position' is non-negative.
-     */
-    function computeLineAndCharacterOfPosition(lineStarts: ReadonlyArray<number>, position: number): LineAndCharacter;
     function getLineAndCharacterOfPosition(sourceFile: SourceFileLike, position: number): LineAndCharacter;
     function isWhiteSpaceLike(ch: number): boolean;
     /** Does not include line breaks. For that, see isWhiteSpaceLike. */
     function isWhiteSpaceSingleLine(ch: number): boolean;
     function isLineBreak(ch: number): boolean;
-    function isOctalDigit(ch: number): boolean;
     function couldStartTrivia(text: string, pos: number): boolean;
-    function skipTrivia(text: string, pos: number, stopAfterLineBreak?: boolean, stopAtComments?: boolean): number;
     function forEachLeadingCommentRange<U>(text: string, pos: number, cb: (pos: number, end: number, kind: CommentKind, hasTrailingNewLine: boolean) => U): U | undefined;
     function forEachLeadingCommentRange<T, U>(text: string, pos: number, cb: (pos: number, end: number, kind: CommentKind, hasTrailingNewLine: boolean, state: T) => U, state: T): U | undefined;
     function forEachTrailingCommentRange<U>(text: string, pos: number, cb: (pos: number, end: number, kind: CommentKind, hasTrailingNewLine: boolean) => U): U | undefined;
@@ -5982,627 +3111,12 @@ declare namespace ts {
     function getShebang(text: string): string | undefined;
     function isIdentifierStart(ch: number, languageVersion: ScriptTarget | undefined): boolean;
     function isIdentifierPart(ch: number, languageVersion: ScriptTarget | undefined): boolean;
-    function isIdentifierText(name: string, languageVersion: ScriptTarget | undefined): boolean;
     function createScanner(languageVersion: ScriptTarget, skipTrivia: boolean, languageVariant?: LanguageVariant, textInitial?: string, onError?: ErrorCallback, start?: number, length?: number): Scanner;
 }
 /** Non-internal stuff goes here */
 declare namespace ts {
-    const emptyArray: never[];
-    function closeFileWatcher(watcher: FileWatcher): void;
     function isExternalModuleNameRelative(moduleName: string): boolean;
     function sortAndDeduplicateDiagnostics<T extends Diagnostic>(diagnostics: ReadonlyArray<T>): T[];
-    function toPath(fileName: string, basePath: string | undefined, getCanonicalFileName: (path: string) => string): Path;
-    function hasEntries(map: ReadonlyUnderscoreEscapedMap<any> | undefined): map is ReadonlyUnderscoreEscapedMap<any>;
-}
-declare namespace ts {
-    const resolvingEmptyArray: never[];
-    const emptyMap: ReadonlyMap<never>;
-    const emptyUnderscoreEscapedMap: ReadonlyUnderscoreEscapedMap<never>;
-    const externalHelpersModuleNameText = "tslib";
-    function getDeclarationOfKind<T extends Declaration>(symbol: Symbol, kind: T["kind"]): T | undefined;
-    /** Create a new escaped identifier map. */
-    function createUnderscoreEscapedMap<T>(): UnderscoreEscapedMap<T>;
-    function createSymbolTable(symbols?: ReadonlyArray<Symbol>): SymbolTable;
-    function changesAffectModuleResolution(oldOptions: CompilerOptions, newOptions: CompilerOptions): boolean;
-    /**
-     * Iterates through the parent chain of a node and performs the callback on each parent until the callback
-     * returns a truthy value, then returns that value.
-     * If no such value is found, it applies the callback until the parent pointer is undefined or the callback returns "quit"
-     * At that point findAncestor returns undefined.
-     */
-    function findAncestor<T extends Node>(node: Node | undefined, callback: (element: Node) => element is T): T | undefined;
-    function findAncestor(node: Node | undefined, callback: (element: Node) => boolean | "quit"): Node | undefined;
-    /**
-     * Calls `callback` for each entry in the map, returning the first truthy result.
-     * Use `map.forEach` instead for normal iteration.
-     */
-    function forEachEntry<T, U>(map: ReadonlyUnderscoreEscapedMap<T>, callback: (value: T, key: __String) => U | undefined): U | undefined;
-    function forEachEntry<T, U>(map: ReadonlyMap<T>, callback: (value: T, key: string) => U | undefined): U | undefined;
-    /** `forEachEntry` for just keys. */
-    function forEachKey<T>(map: ReadonlyUnderscoreEscapedMap<{}>, callback: (key: __String) => T | undefined): T | undefined;
-    function forEachKey<T>(map: ReadonlyMap<{}>, callback: (key: string) => T | undefined): T | undefined;
-    /** Copy entries from `source` to `target`. */
-    function copyEntries<T>(source: ReadonlyUnderscoreEscapedMap<T>, target: UnderscoreEscapedMap<T>): void;
-    function copyEntries<T>(source: ReadonlyMap<T>, target: Map<T>): void;
-    /**
-     * Creates a set from the elements of an array.
-     *
-     * @param array the array of input elements.
-     */
-    function arrayToSet(array: ReadonlyArray<string>): Map<true>;
-    function arrayToSet<T>(array: ReadonlyArray<T>, makeKey: (value: T) => string | undefined): Map<true>;
-    function arrayToSet<T>(array: ReadonlyArray<T>, makeKey: (value: T) => __String | undefined): UnderscoreEscapedMap<true>;
-    function cloneMap(map: SymbolTable): SymbolTable;
-    function cloneMap<T>(map: ReadonlyMap<T>): Map<T>;
-    function cloneMap<T>(map: ReadonlyUnderscoreEscapedMap<T>): UnderscoreEscapedMap<T>;
-    function usingSingleLineStringWriter(action: (writer: EmitTextWriter) => void): string;
-    function getFullWidth(node: Node): number;
-    function getResolvedModule(sourceFile: SourceFile, moduleNameText: string): ResolvedModuleFull | undefined;
-    function setResolvedModule(sourceFile: SourceFile, moduleNameText: string, resolvedModule: ResolvedModuleFull): void;
-    function setResolvedTypeReferenceDirective(sourceFile: SourceFile, typeReferenceDirectiveName: string, resolvedTypeReferenceDirective: ResolvedTypeReferenceDirective): void;
-    function moduleResolutionIsEqualTo(oldResolution: ResolvedModuleFull, newResolution: ResolvedModuleFull): boolean;
-    function packageIdToString({ name, subModuleName, version }: PackageId): string;
-    function typeDirectiveIsEqualTo(oldResolution: ResolvedTypeReferenceDirective, newResolution: ResolvedTypeReferenceDirective): boolean;
-    function hasChangesInResolutions<T>(names: ReadonlyArray<string>, newResolutions: ReadonlyArray<T>, oldResolutions: ReadonlyMap<T> | undefined, comparer: (oldResolution: T, newResolution: T) => boolean): boolean;
-    function containsParseError(node: Node): boolean;
-    function getSourceFileOfNode(node: Node): SourceFile;
-    function getSourceFileOfNode(node: Node | undefined): SourceFile | undefined;
-    function isStatementWithLocals(node: Node): boolean;
-    function getStartPositionOfLine(line: number, sourceFile: SourceFileLike): number;
-    function nodePosToString(node: Node): string;
-    function getEndLinePosition(line: number, sourceFile: SourceFileLike): number;
-    /**
-     * Returns a value indicating whether a name is unique globally or within the current file.
-     * Note: This does not consider whether a name appears as a free identifier or not, so at the expression `x.y` this includes both `x` and `y`.
-     */
-    function isFileLevelUniqueName(sourceFile: SourceFile, name: string, hasGlobalName?: PrintHandlers["hasGlobalName"]): boolean;
-    function nodeIsMissing(node: Node | undefined): boolean;
-    function nodeIsPresent(node: Node | undefined): boolean;
-    /**
-     * Appends a range of value to begin of an array, returning the array.
-     *
-     * @param to The array to which `value` is to be appended. If `to` is `undefined`, a new array
-     * is created if `value` was appended.
-     * @param from The values to append to the array. If `from` is `undefined`, nothing is
-     * appended. If an element of `from` is `undefined`, that element is not appended.
-     */
-    function prependStatements<T extends Statement>(to: T[], from: ReadonlyArray<T> | undefined): T[] | undefined;
-    /**
-     * Determine if the given comment is a triple-slash
-     *
-     * @return true if the comment is a triple-slash comment else false
-     */
-    function isRecognizedTripleSlashComment(text: string, commentPos: number, commentEnd: number): boolean;
-    function isPinnedComment(text: string, start: number): boolean;
-    function getTokenPosOfNode(node: Node, sourceFile?: SourceFileLike, includeJsDoc?: boolean): number;
-    function getNonDecoratorTokenPosOfNode(node: Node, sourceFile?: SourceFileLike): number;
-    function getSourceTextOfNodeFromSourceFile(sourceFile: SourceFile, node: Node, includeTrivia?: boolean): string;
-    function getTextOfNodeFromSourceText(sourceText: string, node: Node, includeTrivia?: boolean): string;
-    function getTextOfNode(node: Node, includeTrivia?: boolean): string;
-    /**
-     * Note: it is expected that the `nodeArray` and the `node` are within the same file.
-     * For example, searching for a `SourceFile` in a `SourceFile[]` wouldn't work.
-     */
-    function indexOfNode(nodeArray: ReadonlyArray<Node>, node: Node): number;
-    /**
-     * Gets flags that control emit behavior of a node.
-     */
-    function getEmitFlags(node: Node): EmitFlags;
-    function getLiteralText(node: LiteralLikeNode, sourceFile: SourceFile): string;
-    function getTextOfConstantValue(value: string | number): string;
-    function escapeLeadingUnderscores(identifier: string): __String;
-    /**
-     * @deprecated Use `id.escapedText` to get the escaped text of an Identifier.
-     * @param identifier The identifier to escape
-     */
-    function escapeIdentifier(identifier: string): string;
-    function makeIdentifierFromModuleName(moduleName: string): string;
-    function isBlockOrCatchScoped(declaration: Declaration): boolean;
-    function isCatchClauseVariableDeclarationOrBindingElement(declaration: Declaration): boolean;
-    function isAmbientModule(node: Node): node is AmbientModuleDeclaration;
-    function isModuleWithStringLiteralName(node: Node): node is ModuleDeclaration;
-    function isNonGlobalAmbientModule(node: Node): node is ModuleDeclaration & {
-        name: StringLiteral;
-    };
-    /**
-     * An effective module (namespace) declaration is either
-     * 1. An actual declaration: namespace X { ... }
-     * 2. A Javascript declaration, which is:
-     *    An identifier in a nested property access expression: Y in `X.Y.Z = { ... }`
-     */
-    function isEffectiveModuleDeclaration(node: Node): boolean;
-    /** Given a symbol for a module, checks that it is a shorthand ambient module. */
-    function isShorthandAmbientModuleSymbol(moduleSymbol: Symbol): boolean;
-    function isBlockScopedContainerTopLevel(node: Node): boolean;
-    function isGlobalScopeAugmentation(module: ModuleDeclaration): boolean;
-    function isExternalModuleAugmentation(node: Node): node is AmbientModuleDeclaration;
-    function isModuleAugmentationExternal(node: AmbientModuleDeclaration): boolean;
-    function isEffectiveExternalModule(node: SourceFile, compilerOptions: CompilerOptions): boolean;
-    function isBlockScope(node: Node, parentNode: Node): boolean;
-    function isDeclarationWithTypeParameters(node: Node): node is DeclarationWithTypeParameters;
-    function isAnyImportSyntax(node: Node): node is AnyImportSyntax;
-    function isLateVisibilityPaintedStatement(node: Node): node is LateVisibilityPaintedStatement;
-    function isAnyImportOrReExport(node: Node): node is AnyImportOrReExport;
-    function getEnclosingBlockScopeContainer(node: Node): Node;
-    function declarationNameToString(name: DeclarationName | QualifiedName): string;
-    function getNameFromIndexInfo(info: IndexInfo): string | undefined;
-    function getTextOfPropertyName(name: PropertyName): __String;
-    function entityNameToString(name: EntityNameOrEntityNameExpression): string;
-    function createDiagnosticForNode(node: Node, message: DiagnosticMessage, arg0?: string | number, arg1?: string | number, arg2?: string | number, arg3?: string | number): DiagnosticWithLocation;
-    function createDiagnosticForNodeArray(sourceFile: SourceFile, nodes: NodeArray<Node>, message: DiagnosticMessage, arg0?: string | number, arg1?: string | number, arg2?: string | number, arg3?: string | number): Diagnostic;
-    function createDiagnosticForNodeInSourceFile(sourceFile: SourceFile, node: Node, message: DiagnosticMessage, arg0?: string | number, arg1?: string | number, arg2?: string | number, arg3?: string | number): DiagnosticWithLocation;
-    function createDiagnosticForNodeFromMessageChain(node: Node, messageChain: DiagnosticMessageChain): DiagnosticWithLocation;
-    function getSpanOfTokenAtPosition(sourceFile: SourceFile, pos: number): TextSpan;
-    function getErrorSpanForNode(sourceFile: SourceFile, node: Node): TextSpan;
-    function isExternalOrCommonJsModule(file: SourceFile): boolean;
-    function isJsonSourceFile(file: SourceFile): file is JsonSourceFile;
-    function isConstEnumDeclaration(node: Node): boolean;
-    function isConst(node: Node): boolean;
-    function isLet(node: Node): boolean;
-    function isSuperCall(n: Node): n is SuperCall;
-    function isImportCall(n: Node): n is ImportCall;
-    function isLiteralImportTypeNode(n: Node): n is LiteralImportTypeNode;
-    function isPrologueDirective(node: Node): node is PrologueDirective;
-    function getLeadingCommentRangesOfNode(node: Node, sourceFileOfNode: SourceFile): CommentRange[] | undefined;
-    function getJSDocCommentRanges(node: Node, text: string): CommentRange[] | undefined;
-    const fullTripleSlashReferencePathRegEx: RegExp;
-    const fullTripleSlashAMDReferencePathRegEx: RegExp;
-    function isPartOfTypeNode(node: Node): boolean;
-    function isChildOfNodeWithKind(node: Node, kind: SyntaxKind): boolean;
-    function forEachReturnStatement<T>(body: Block, visitor: (stmt: ReturnStatement) => T): T | undefined;
-    function forEachYieldExpression(body: Block, visitor: (expr: YieldExpression) => void): void;
-    /**
-     * Gets the most likely element type for a TypeNode. This is not an exhaustive test
-     * as it assumes a rest argument can only be an array type (either T[], or Array<T>).
-     *
-     * @param node The type node.
-     */
-    function getRestParameterElementType(node: TypeNode | undefined): TypeNode | undefined;
-    function getMembersOfDeclaration(node: Declaration): NodeArray<ClassElement | TypeElement | ObjectLiteralElement> | undefined;
-    function isVariableLike(node: Node): node is VariableLikeDeclaration;
-    function isVariableLikeOrAccessor(node: Node): node is AccessorDeclaration | VariableLikeDeclaration;
-    function isVariableDeclarationInVariableStatement(node: VariableDeclaration): boolean;
-    function isValidESSymbolDeclaration(node: Node): node is VariableDeclaration | PropertyDeclaration | SignatureDeclaration;
-    function introducesArgumentsExoticObject(node: Node): boolean;
-    function unwrapInnermostStatementOfLabel(node: LabeledStatement, beforeUnwrapLabelCallback?: (node: LabeledStatement) => void): Statement;
-    function isFunctionBlock(node: Node): boolean;
-    function isObjectLiteralMethod(node: Node): node is MethodDeclaration;
-    function isObjectLiteralOrClassExpressionMethod(node: Node): node is MethodDeclaration;
-    function isIdentifierTypePredicate(predicate: TypePredicate): predicate is IdentifierTypePredicate;
-    function isThisTypePredicate(predicate: TypePredicate): predicate is ThisTypePredicate;
-    function getPropertyAssignment(objectLiteral: ObjectLiteralExpression, key: string, key2?: string): ReadonlyArray<PropertyAssignment>;
-    function getTsConfigObjectLiteralExpression(tsConfigSourceFile: TsConfigSourceFile | undefined): ObjectLiteralExpression | undefined;
-    function getTsConfigPropArrayElementValue(tsConfigSourceFile: TsConfigSourceFile | undefined, propKey: string, elementValue: string): StringLiteral | undefined;
-    function getTsConfigPropArray(tsConfigSourceFile: TsConfigSourceFile | undefined, propKey: string): ReadonlyArray<PropertyAssignment>;
-    function getContainingFunction(node: Node): SignatureDeclaration | undefined;
-    function getContainingClass(node: Node): ClassLikeDeclaration | undefined;
-    function getThisContainer(node: Node, includeArrowFunctions: boolean): Node;
-    function getNewTargetContainer(node: Node): Node | undefined;
-    /**
-     * Given an super call/property node, returns the closest node where
-     * - a super call/property access is legal in the node and not legal in the parent node the node.
-     *   i.e. super call is legal in constructor but not legal in the class body.
-     * - the container is an arrow function (so caller might need to call getSuperContainer again in case it needs to climb higher)
-     * - a super call/property is definitely illegal in the container (but might be legal in some subnode)
-     *   i.e. super property access is illegal in function declaration but can be legal in the statement list
-     */
-    function getSuperContainer(node: Node, stopOnFunctions: boolean): Node;
-    function getImmediatelyInvokedFunctionExpression(func: Node): CallExpression | undefined;
-    /**
-     * Determines whether a node is a property or element access expression for `super`.
-     */
-    function isSuperProperty(node: Node): node is SuperProperty;
-    /**
-     * Determines whether a node is a property or element access expression for `this`.
-     */
-    function isThisProperty(node: Node): boolean;
-    function getEntityNameFromTypeNode(node: TypeNode): EntityNameOrEntityNameExpression | undefined;
-    function getInvokedExpression(node: CallLikeExpression): Expression;
-    function nodeCanBeDecorated(node: ClassDeclaration): true;
-    function nodeCanBeDecorated(node: ClassElement, parent: Node): boolean;
-    function nodeCanBeDecorated(node: Node, parent: Node, grandparent: Node): boolean;
-    function nodeIsDecorated(node: ClassDeclaration): boolean;
-    function nodeIsDecorated(node: ClassElement, parent: Node): boolean;
-    function nodeIsDecorated(node: Node, parent: Node, grandparent: Node): boolean;
-    function nodeOrChildIsDecorated(node: ClassDeclaration): boolean;
-    function nodeOrChildIsDecorated(node: ClassElement, parent: Node): boolean;
-    function nodeOrChildIsDecorated(node: Node, parent: Node, grandparent: Node): boolean;
-    function childIsDecorated(node: ClassDeclaration): boolean;
-    function childIsDecorated(node: Node, parent: Node): boolean;
-    function isJSXTagName(node: Node): boolean;
-    function isExpressionNode(node: Node): boolean;
-    function isInExpressionContext(node: Node): boolean;
-    function isExternalModuleImportEqualsDeclaration(node: Node): boolean;
-    function getExternalModuleImportEqualsDeclarationExpression(node: Node): Expression;
-    function isInternalModuleImportEqualsDeclaration(node: Node): node is ImportEqualsDeclaration;
-    function isSourceFileJavaScript(file: SourceFile): boolean;
-    function isSourceFileNotJavaScript(file: SourceFile): boolean;
-    function isInJavaScriptFile(node: Node | undefined): boolean;
-    function isInJsonFile(node: Node | undefined): boolean;
-    function isInJSDoc(node: Node | undefined): boolean;
-    function isJSDocIndexSignature(node: TypeReferenceNode | ExpressionWithTypeArguments): boolean | undefined;
-    /**
-     * Returns true if the node is a CallExpression to the identifier 'require' with
-     * exactly one argument (of the form 'require("name")').
-     * This function does not test if the node is in a JavaScript file or not.
-     */
-    function isRequireCall(callExpression: Node, checkArgumentIsStringLiteralLike: true): callExpression is RequireOrImportCall & {
-        expression: Identifier;
-        arguments: [StringLiteralLike];
-    };
-    function isRequireCall(callExpression: Node, checkArgumentIsStringLiteralLike: boolean): callExpression is CallExpression;
-    function isSingleOrDoubleQuote(charCode: number): boolean;
-    function isStringDoubleQuoted(str: StringLiteralLike, sourceFile: SourceFile): boolean;
-    function getDeclarationOfJSInitializer(node: Node): Node | undefined;
-    /** Get the initializer, taking into account defaulted Javascript initializers */
-    function getEffectiveInitializer(node: HasExpressionInitializer): Expression | undefined;
-    /**
-     * Get the assignment 'initializer' -- the righthand side-- when the initializer is container-like (See getJavascriptInitializer).
-     * We treat the right hand side of assignments with container-like initalizers as declarations.
-     */
-    function getAssignedJavascriptInitializer(node: Node): Expression | undefined;
-    /**
-     * Recognized Javascript container-like initializers are:
-     * 1. (function() {})() -- IIFEs
-     * 2. function() { } -- Function expressions
-     * 3. class { } -- Class expressions
-     * 4. {} -- Empty object literals
-     * 5. { ... } -- Non-empty object literals, when used to initialize a prototype, like `C.prototype = { m() { } }`
-     *
-     * This function returns the provided initializer, or undefined if it is not valid.
-     */
-    function getJavascriptInitializer(initializer: Node, isPrototypeAssignment: boolean): Expression | undefined;
-    function isDefaultedJavascriptInitializer(node: BinaryExpression): boolean | undefined;
-    /** Given a Javascript initializer, return the outer name. That is, the lhs of the assignment or the declaration name. */
-    function getOuterNameOfJsInitializer(node: Declaration): DeclarationName | undefined;
-    function getRightMostAssignedExpression(node: Expression): Expression;
-    function isExportsIdentifier(node: Node): boolean;
-    function isModuleExportsPropertyAccessExpression(node: Node): boolean;
-    function getSpecialPropertyAssignmentKind(expr: BinaryExpression): SpecialPropertyAssignmentKind;
-    function getInitializerOfBinaryExpression(expr: BinaryExpression): Expression;
-    function isPrototypePropertyAssignment(node: Node): boolean;
-    function isSpecialPropertyDeclaration(expr: PropertyAccessExpression): boolean;
-    function importFromModuleSpecifier(node: StringLiteralLike): AnyValidImportOrReExport;
-    function tryGetImportFromModuleSpecifier(node: StringLiteralLike): AnyValidImportOrReExport | undefined;
-    function getExternalModuleName(node: AnyImportOrReExport | ImportTypeNode): Expression | undefined;
-    function getNamespaceDeclarationNode(node: ImportDeclaration | ImportEqualsDeclaration | ExportDeclaration): ImportEqualsDeclaration | NamespaceImport | undefined;
-    function isDefaultImport(node: ImportDeclaration | ImportEqualsDeclaration | ExportDeclaration): boolean;
-    function hasQuestionToken(node: Node): boolean;
-    function isJSDocConstructSignature(node: Node): boolean;
-    function isJSDocTypeAlias(node: Node): node is JSDocTypedefTag | JSDocCallbackTag;
-    function isTypeAlias(node: Node): node is JSDocTypedefTag | JSDocCallbackTag | TypeAliasDeclaration;
-    function getJSDocCommentsAndTags(hostNode: Node): ReadonlyArray<JSDoc | JSDocTag>;
-    /** Does the opposite of `getJSDocParameterTags`: given a JSDoc parameter, finds the parameter corresponding to it. */
-    function getParameterSymbolFromJSDoc(node: JSDocParameterTag): Symbol | undefined;
-    function getHostSignatureFromJSDoc(node: Node): SignatureDeclaration | undefined;
-    function getHostSignatureFromJSDocHost(host: HasJSDoc): SignatureDeclaration | undefined;
-    function getJSDocHost(node: Node): HasJSDoc;
-    function getTypeParameterFromJsDoc(node: TypeParameterDeclaration & {
-        parent: JSDocTemplateTag;
-    }): TypeParameterDeclaration | undefined;
-    function hasRestParameter(s: SignatureDeclaration | JSDocSignature): boolean;
-    function isRestParameter(node: ParameterDeclaration | JSDocParameterTag): boolean;
-    enum AssignmentKind {
-        None = 0,
-        Definite = 1,
-        Compound = 2
-    }
-    function getAssignmentTargetKind(node: Node): AssignmentKind;
-    function isAssignmentTarget(node: Node): boolean;
-    type NodeWithPossibleHoistedDeclaration = Block | VariableStatement | WithStatement | IfStatement | SwitchStatement | CaseBlock | CaseClause | DefaultClause | LabeledStatement | ForStatement | ForInStatement | ForOfStatement | DoStatement | WhileStatement | TryStatement | CatchClause;
-    /**
-     * Indicates whether a node could contain a `var` VariableDeclarationList that contributes to
-     * the same `var` declaration scope as the node's parent.
-     */
-    function isNodeWithPossibleHoistedDeclaration(node: Node): node is NodeWithPossibleHoistedDeclaration;
-    type ValueSignatureDeclaration = FunctionDeclaration | MethodDeclaration | ConstructorDeclaration | AccessorDeclaration | FunctionExpression | ArrowFunction;
-    function isValueSignatureDeclaration(node: Node): node is ValueSignatureDeclaration;
-    function walkUpParenthesizedTypes(node: Node): Node;
-    function walkUpParenthesizedExpressions(node: Node): Node;
-    function skipParentheses(node: Expression): Expression;
-    function skipParentheses(node: Node): Node;
-    function isDeleteTarget(node: Node): boolean;
-    function isNodeDescendantOf(node: Node, ancestor: Node): boolean;
-    function isDeclarationName(name: Node): boolean;
-    function isAnyDeclarationName(name: Node): boolean;
-    function isLiteralComputedPropertyDeclarationName(node: Node): boolean;
-    function isIdentifierName(node: Identifier): boolean;
-    function isAliasSymbolDeclaration(node: Node): boolean;
-    function exportAssignmentIsAlias(node: ExportAssignment | BinaryExpression): boolean;
-    function getClassExtendsHeritageClauseElement(node: ClassLikeDeclaration | InterfaceDeclaration): ExpressionWithTypeArguments | undefined;
-    function getClassImplementsHeritageClauseElements(node: ClassLikeDeclaration): NodeArray<ExpressionWithTypeArguments> | undefined;
-    /** Returns the node in an `extends` or `implements` clause of a class or interface. */
-    function getAllSuperTypeNodes(node: Node): ReadonlyArray<TypeNode>;
-    function getInterfaceBaseTypeNodes(node: InterfaceDeclaration): NodeArray<ExpressionWithTypeArguments> | undefined;
-    function getHeritageClause(clauses: NodeArray<HeritageClause> | undefined, kind: SyntaxKind): HeritageClause | undefined;
-    function tryResolveScriptReference(host: ScriptReferenceHost, sourceFile: SourceFile, reference: FileReference): SourceFile | undefined;
-    function getAncestor(node: Node | undefined, kind: SyntaxKind): Node | undefined;
-    function isKeyword(token: SyntaxKind): boolean;
-    function isContextualKeyword(token: SyntaxKind): boolean;
-    function isNonContextualKeyword(token: SyntaxKind): boolean;
-    function isStringANonContextualKeyword(name: string): boolean;
-    type TriviaKind = SyntaxKind.SingleLineCommentTrivia | SyntaxKind.MultiLineCommentTrivia | SyntaxKind.NewLineTrivia | SyntaxKind.WhitespaceTrivia | SyntaxKind.ShebangTrivia | SyntaxKind.ConflictMarkerTrivia;
-    function isTrivia(token: SyntaxKind): token is TriviaKind;
-    enum FunctionFlags {
-        Normal = 0,
-        Generator = 1,
-        Async = 2,
-        Invalid = 4,
-        AsyncGenerator = 3
-    }
-    function getFunctionFlags(node: SignatureDeclaration | undefined): FunctionFlags;
-    function isAsyncFunction(node: Node): boolean;
-    function isStringOrNumericLiteral(node: Node): node is StringLiteral | NumericLiteral;
-    /**
-     * A declaration has a dynamic name if both of the following are true:
-     *   1. The declaration has a computed property name
-     *   2. The computed name is *not* expressed as Symbol.<name>, where name
-     *      is a property of the Symbol constructor that denotes a built in
-     *      Symbol.
-     */
-    function hasDynamicName(declaration: Declaration): declaration is DynamicNamedDeclaration;
-    function isDynamicName(name: DeclarationName): boolean;
-    /**
-     * Checks if the expression is of the form:
-     *    Symbol.name
-     * where Symbol is literally the word "Symbol", and name is any identifierName
-     */
-    function isWellKnownSymbolSyntactically(node: Expression): boolean;
-    function getPropertyNameForPropertyNameNode(name: DeclarationName): __String | undefined;
-    type PropertyNameLiteral = Identifier | StringLiteralLike | NumericLiteral;
-    function isPropertyNameLiteral(node: Node): node is PropertyNameLiteral;
-    function getTextOfIdentifierOrLiteral(node: PropertyNameLiteral): string;
-    function getEscapedTextOfIdentifierOrLiteral(node: PropertyNameLiteral): __String;
-    function getPropertyNameForKnownSymbolName(symbolName: string): __String;
-    function isKnownSymbol(symbol: Symbol): boolean;
-    /**
-     * Includes the word "Symbol" with unicode escapes
-     */
-    function isESSymbolIdentifier(node: Node): boolean;
-    function isPushOrUnshiftIdentifier(node: Identifier): boolean;
-    function isParameterDeclaration(node: VariableLikeDeclaration): boolean;
-    function getRootDeclaration(node: Node): Node;
-    function nodeStartsNewLexicalEnvironment(node: Node): boolean;
-    function nodeIsSynthesized(range: TextRange): boolean;
-    function getOriginalSourceFile(sourceFile: SourceFile): SourceFile;
-    enum Associativity {
-        Left = 0,
-        Right = 1
-    }
-    function getExpressionAssociativity(expression: Expression): Associativity;
-    function getOperatorAssociativity(kind: SyntaxKind, operator: SyntaxKind, hasArguments?: boolean): Associativity;
-    function getExpressionPrecedence(expression: Expression): number;
-    function getOperator(expression: Expression): SyntaxKind.Unknown | SyntaxKind.EndOfFileToken | SyntaxKind.SingleLineCommentTrivia | SyntaxKind.MultiLineCommentTrivia | SyntaxKind.NewLineTrivia | SyntaxKind.WhitespaceTrivia | SyntaxKind.ShebangTrivia | SyntaxKind.ConflictMarkerTrivia | SyntaxKind.NumericLiteral | SyntaxKind.StringLiteral | SyntaxKind.JsxText | SyntaxKind.JsxTextAllWhiteSpaces | SyntaxKind.RegularExpressionLiteral | SyntaxKind.NoSubstitutionTemplateLiteral | SyntaxKind.TemplateHead | SyntaxKind.TemplateMiddle | SyntaxKind.TemplateTail | SyntaxKind.OpenBraceToken | SyntaxKind.CloseBraceToken | SyntaxKind.OpenParenToken | SyntaxKind.CloseParenToken | SyntaxKind.OpenBracketToken | SyntaxKind.CloseBracketToken | SyntaxKind.DotToken | SyntaxKind.DotDotDotToken | SyntaxKind.SemicolonToken | SyntaxKind.CommaToken | SyntaxKind.LessThanToken | SyntaxKind.LessThanSlashToken | SyntaxKind.GreaterThanToken | SyntaxKind.LessThanEqualsToken | SyntaxKind.GreaterThanEqualsToken | SyntaxKind.EqualsEqualsToken | SyntaxKind.ExclamationEqualsToken | SyntaxKind.EqualsEqualsEqualsToken | SyntaxKind.ExclamationEqualsEqualsToken | SyntaxKind.EqualsGreaterThanToken | SyntaxKind.PlusToken | SyntaxKind.MinusToken | SyntaxKind.AsteriskToken | SyntaxKind.AsteriskAsteriskToken | SyntaxKind.SlashToken | SyntaxKind.PercentToken | SyntaxKind.PlusPlusToken | SyntaxKind.MinusMinusToken | SyntaxKind.LessThanLessThanToken | SyntaxKind.GreaterThanGreaterThanToken | SyntaxKind.GreaterThanGreaterThanGreaterThanToken | SyntaxKind.AmpersandToken | SyntaxKind.BarToken | SyntaxKind.CaretToken | SyntaxKind.ExclamationToken | SyntaxKind.TildeToken | SyntaxKind.AmpersandAmpersandToken | SyntaxKind.BarBarToken | SyntaxKind.QuestionToken | SyntaxKind.ColonToken | SyntaxKind.AtToken | SyntaxKind.EqualsToken | SyntaxKind.PlusEqualsToken | SyntaxKind.MinusEqualsToken | SyntaxKind.AsteriskEqualsToken | SyntaxKind.AsteriskAsteriskEqualsToken | SyntaxKind.SlashEqualsToken | SyntaxKind.PercentEqualsToken | SyntaxKind.LessThanLessThanEqualsToken | SyntaxKind.GreaterThanGreaterThanEqualsToken | SyntaxKind.GreaterThanGreaterThanGreaterThanEqualsToken | SyntaxKind.AmpersandEqualsToken | SyntaxKind.BarEqualsToken | SyntaxKind.CaretEqualsToken | SyntaxKind.Identifier | SyntaxKind.BreakKeyword | SyntaxKind.CaseKeyword | SyntaxKind.CatchKeyword | SyntaxKind.ClassKeyword | SyntaxKind.ConstKeyword | SyntaxKind.ContinueKeyword | SyntaxKind.DebuggerKeyword | SyntaxKind.DefaultKeyword | SyntaxKind.DeleteKeyword | SyntaxKind.DoKeyword | SyntaxKind.ElseKeyword | SyntaxKind.EnumKeyword | SyntaxKind.ExportKeyword | SyntaxKind.ExtendsKeyword | SyntaxKind.FalseKeyword | SyntaxKind.FinallyKeyword | SyntaxKind.ForKeyword | SyntaxKind.FunctionKeyword | SyntaxKind.IfKeyword | SyntaxKind.ImportKeyword | SyntaxKind.InKeyword | SyntaxKind.InstanceOfKeyword | SyntaxKind.NewKeyword | SyntaxKind.NullKeyword | SyntaxKind.ReturnKeyword | SyntaxKind.SuperKeyword | SyntaxKind.SwitchKeyword | SyntaxKind.ThisKeyword | SyntaxKind.ThrowKeyword | SyntaxKind.TrueKeyword | SyntaxKind.TryKeyword | SyntaxKind.TypeOfKeyword | SyntaxKind.VarKeyword | SyntaxKind.VoidKeyword | SyntaxKind.WhileKeyword | SyntaxKind.WithKeyword | SyntaxKind.ImplementsKeyword | SyntaxKind.InterfaceKeyword | SyntaxKind.LetKeyword | SyntaxKind.PackageKeyword | SyntaxKind.PrivateKeyword | SyntaxKind.ProtectedKeyword | SyntaxKind.PublicKeyword | SyntaxKind.StaticKeyword | SyntaxKind.YieldKeyword | SyntaxKind.AbstractKeyword | SyntaxKind.AsKeyword | SyntaxKind.AnyKeyword | SyntaxKind.AsyncKeyword | SyntaxKind.AwaitKeyword | SyntaxKind.BooleanKeyword | SyntaxKind.ConstructorKeyword | SyntaxKind.DeclareKeyword | SyntaxKind.GetKeyword | SyntaxKind.InferKeyword | SyntaxKind.IsKeyword | SyntaxKind.KeyOfKeyword | SyntaxKind.ModuleKeyword | SyntaxKind.NamespaceKeyword | SyntaxKind.NeverKeyword | SyntaxKind.ReadonlyKeyword | SyntaxKind.RequireKeyword | SyntaxKind.NumberKeyword | SyntaxKind.ObjectKeyword | SyntaxKind.SetKeyword | SyntaxKind.StringKeyword | SyntaxKind.SymbolKeyword | SyntaxKind.TypeKeyword | SyntaxKind.UndefinedKeyword | SyntaxKind.UniqueKeyword | SyntaxKind.UnknownKeyword | SyntaxKind.FromKeyword | SyntaxKind.GlobalKeyword | SyntaxKind.OfKeyword | SyntaxKind.QualifiedName | SyntaxKind.ComputedPropertyName | SyntaxKind.TypeParameter | SyntaxKind.Parameter | SyntaxKind.Decorator | SyntaxKind.PropertySignature | SyntaxKind.PropertyDeclaration | SyntaxKind.MethodSignature | SyntaxKind.MethodDeclaration | SyntaxKind.Constructor | SyntaxKind.GetAccessor | SyntaxKind.SetAccessor | SyntaxKind.CallSignature | SyntaxKind.ConstructSignature | SyntaxKind.IndexSignature | SyntaxKind.TypePredicate | SyntaxKind.TypeReference | SyntaxKind.FunctionType | SyntaxKind.ConstructorType | SyntaxKind.TypeQuery | SyntaxKind.TypeLiteral | SyntaxKind.ArrayType | SyntaxKind.TupleType | SyntaxKind.OptionalType | SyntaxKind.UnionType | SyntaxKind.IntersectionType | SyntaxKind.ConditionalType | SyntaxKind.InferType | SyntaxKind.ParenthesizedType | SyntaxKind.ThisType | SyntaxKind.TypeOperator | SyntaxKind.IndexedAccessType | SyntaxKind.MappedType | SyntaxKind.LiteralType | SyntaxKind.ImportType | SyntaxKind.ObjectBindingPattern | SyntaxKind.ArrayBindingPattern | SyntaxKind.BindingElement | SyntaxKind.ArrayLiteralExpression | SyntaxKind.ObjectLiteralExpression | SyntaxKind.PropertyAccessExpression | SyntaxKind.ElementAccessExpression | SyntaxKind.CallExpression | SyntaxKind.NewExpression | SyntaxKind.TaggedTemplateExpression | SyntaxKind.TypeAssertionExpression | SyntaxKind.ParenthesizedExpression | SyntaxKind.FunctionExpression | SyntaxKind.ArrowFunction | SyntaxKind.DeleteExpression | SyntaxKind.TypeOfExpression | SyntaxKind.VoidExpression | SyntaxKind.AwaitExpression | SyntaxKind.ConditionalExpression | SyntaxKind.TemplateExpression | SyntaxKind.YieldExpression | SyntaxKind.SpreadElement | SyntaxKind.ClassExpression | SyntaxKind.OmittedExpression | SyntaxKind.ExpressionWithTypeArguments | SyntaxKind.AsExpression | SyntaxKind.NonNullExpression | SyntaxKind.MetaProperty | SyntaxKind.SyntheticExpression | SyntaxKind.TemplateSpan | SyntaxKind.SemicolonClassElement | SyntaxKind.Block | SyntaxKind.VariableStatement | SyntaxKind.EmptyStatement | SyntaxKind.ExpressionStatement | SyntaxKind.IfStatement | SyntaxKind.DoStatement | SyntaxKind.WhileStatement | SyntaxKind.ForStatement | SyntaxKind.ForInStatement | SyntaxKind.ForOfStatement | SyntaxKind.ContinueStatement | SyntaxKind.BreakStatement | SyntaxKind.ReturnStatement | SyntaxKind.WithStatement | SyntaxKind.SwitchStatement | SyntaxKind.LabeledStatement | SyntaxKind.ThrowStatement | SyntaxKind.TryStatement | SyntaxKind.DebuggerStatement | SyntaxKind.VariableDeclaration | SyntaxKind.VariableDeclarationList | SyntaxKind.FunctionDeclaration | SyntaxKind.ClassDeclaration | SyntaxKind.InterfaceDeclaration | SyntaxKind.TypeAliasDeclaration | SyntaxKind.EnumDeclaration | SyntaxKind.ModuleDeclaration | SyntaxKind.ModuleBlock | SyntaxKind.CaseBlock | SyntaxKind.NamespaceExportDeclaration | SyntaxKind.ImportEqualsDeclaration | SyntaxKind.ImportDeclaration | SyntaxKind.ImportClause | SyntaxKind.NamespaceImport | SyntaxKind.NamedImports | SyntaxKind.ImportSpecifier | SyntaxKind.ExportAssignment | SyntaxKind.ExportDeclaration | SyntaxKind.NamedExports | SyntaxKind.ExportSpecifier | SyntaxKind.MissingDeclaration | SyntaxKind.ExternalModuleReference | SyntaxKind.JsxElement | SyntaxKind.JsxSelfClosingElement | SyntaxKind.JsxOpeningElement | SyntaxKind.JsxClosingElement | SyntaxKind.JsxFragment | SyntaxKind.JsxOpeningFragment | SyntaxKind.JsxClosingFragment | SyntaxKind.JsxAttribute | SyntaxKind.JsxAttributes | SyntaxKind.JsxSpreadAttribute | SyntaxKind.JsxExpression | SyntaxKind.CaseClause | SyntaxKind.DefaultClause | SyntaxKind.HeritageClause | SyntaxKind.CatchClause | SyntaxKind.PropertyAssignment | SyntaxKind.ShorthandPropertyAssignment | SyntaxKind.SpreadAssignment | SyntaxKind.EnumMember | SyntaxKind.SourceFile | SyntaxKind.Bundle | SyntaxKind.UnparsedSource | SyntaxKind.InputFiles | SyntaxKind.JSDocTypeExpression | SyntaxKind.JSDocAllType | SyntaxKind.JSDocUnknownType | SyntaxKind.JSDocNullableType | SyntaxKind.JSDocNonNullableType | SyntaxKind.JSDocOptionalType | SyntaxKind.JSDocFunctionType | SyntaxKind.JSDocVariadicType | SyntaxKind.JSDocComment | SyntaxKind.JSDocTypeLiteral | SyntaxKind.JSDocSignature | SyntaxKind.JSDocTag | SyntaxKind.JSDocAugmentsTag | SyntaxKind.JSDocClassTag | SyntaxKind.JSDocCallbackTag | SyntaxKind.JSDocParameterTag | SyntaxKind.JSDocReturnTag | SyntaxKind.JSDocTypeTag | SyntaxKind.JSDocTemplateTag | SyntaxKind.JSDocTypedefTag | SyntaxKind.JSDocPropertyTag | SyntaxKind.SyntaxList | SyntaxKind.NotEmittedStatement | SyntaxKind.PartiallyEmittedExpression | SyntaxKind.CommaListExpression | SyntaxKind.MergeDeclarationMarker | SyntaxKind.EndOfDeclarationMarker | SyntaxKind.Count;
-    function getOperatorPrecedence(nodeKind: SyntaxKind, operatorKind: SyntaxKind, hasArguments?: boolean): number;
-    function getBinaryOperatorPrecedence(kind: SyntaxKind): number;
-    function createDiagnosticCollection(): DiagnosticCollection;
-    /**
-     * Based heavily on the abstract 'Quote'/'QuoteJSONString' operation from ECMA-262 (24.3.2.2),
-     * but augmented for a few select characters (e.g. lineSeparator, paragraphSeparator, nextLine)
-     * Note that this doesn't actually wrap the input in double quotes.
-     */
-    function escapeString(s: string, quoteChar?: CharacterCodes.doubleQuote | CharacterCodes.singleQuote | CharacterCodes.backtick): string;
-    function isIntrinsicJsxName(name: __String | string): boolean;
-    function escapeNonAsciiString(s: string, quoteChar?: CharacterCodes.doubleQuote | CharacterCodes.singleQuote | CharacterCodes.backtick): string;
-    function getIndentString(level: number): string;
-    function getIndentSize(): number;
-    function createTextWriter(newLine: string): EmitTextWriter;
-    function getResolvedExternalModuleName(host: EmitHost, file: SourceFile, referenceFile?: SourceFile): string;
-    function getExternalModuleNameFromDeclaration(host: EmitHost, resolver: EmitResolver, declaration: ImportEqualsDeclaration | ImportDeclaration | ExportDeclaration | ModuleDeclaration | ImportTypeNode): string | undefined;
-    /**
-     * Resolves a local path to a path which is absolute to the base of the emit
-     */
-    function getExternalModuleNameFromPath(host: EmitHost, fileName: string, referencePath?: string): string;
-    function getOwnEmitOutputFilePath(sourceFile: SourceFile, host: EmitHost, extension: string): string;
-    function getDeclarationEmitOutputFilePath(sourceFile: SourceFile, host: EmitHost): string;
-    interface EmitFileNames {
-        jsFilePath: string;
-        sourceMapFilePath: string | undefined;
-        declarationFilePath: string | undefined;
-        declarationMapPath: string | undefined;
-        bundleInfoPath: string | undefined;
-    }
-    /**
-     * Gets the source files that are expected to have an emit output.
-     *
-     * Originally part of `forEachExpectedEmitFile`, this functionality was extracted to support
-     * transformations.
-     *
-     * @param host An EmitHost.
-     * @param targetSourceFile An optional target source file to emit.
-     */
-    function getSourceFilesToEmit(host: EmitHost, targetSourceFile?: SourceFile): ReadonlyArray<SourceFile>;
-    /** Don't call this for `--outFile`, just for `--outDir` or plain emit. `--outFile` needs additional checks. */
-    function sourceFileMayBeEmitted(sourceFile: SourceFile, options: CompilerOptions, isSourceFileFromExternalLibrary: (file: SourceFile) => boolean): boolean;
-    function getSourceFilePathInNewDir(sourceFile: SourceFile, host: EmitHost, newDirPath: string): string;
-    function writeFile(host: EmitHost, diagnostics: DiagnosticCollection, fileName: string, data: string, writeByteOrderMark: boolean, sourceFiles?: ReadonlyArray<SourceFile>): void;
-    function getLineOfLocalPosition(currentSourceFile: SourceFile, pos: number): number;
-    function getLineOfLocalPositionFromLineMap(lineMap: ReadonlyArray<number>, pos: number): number;
-    function getFirstConstructorWithBody(node: ClassLikeDeclaration): ConstructorDeclaration | undefined;
-    /** Get the type annotation for the value parameter. */
-    function getSetAccessorTypeAnnotationNode(accessor: SetAccessorDeclaration): TypeNode | undefined;
-    function getThisParameter(signature: SignatureDeclaration | JSDocSignature): ParameterDeclaration | undefined;
-    function parameterIsThisKeyword(parameter: ParameterDeclaration): boolean;
-    function isThisIdentifier(node: Node | undefined): boolean;
-    function identifierIsThisKeyword(id: Identifier): boolean;
-    function getAllAccessorDeclarations(declarations: NodeArray<Declaration>, accessor: AccessorDeclaration): AllAccessorDeclarations;
-    /**
-     * Gets the effective type annotation of a variable, parameter, or property. If the node was
-     * parsed in a JavaScript file, gets the type annotation from JSDoc.
-     */
-    function getEffectiveTypeAnnotationNode(node: Node): TypeNode | undefined;
-    function getTypeAnnotationNode(node: Node): TypeNode | undefined;
-    /**
-     * Gets the effective return type annotation of a signature. If the node was parsed in a
-     * JavaScript file, gets the return type annotation from JSDoc.
-     */
-    function getEffectiveReturnTypeNode(node: SignatureDeclaration | JSDocSignature): TypeNode | undefined;
-    /**
-     * Gets the effective type parameters. If the node was parsed in a
-     * JavaScript file, gets the type parameters from the `@template` tag from JSDoc.
-     */
-    function getEffectiveTypeParameterDeclarations(node: DeclarationWithTypeParameters): ReadonlyArray<TypeParameterDeclaration>;
-    function getJSDocTypeParameterDeclarations(node: DeclarationWithTypeParameters): ReadonlyArray<TypeParameterDeclaration>;
-    /**
-     * Gets the effective type annotation of the value parameter of a set accessor. If the node
-     * was parsed in a JavaScript file, gets the type annotation from JSDoc.
-     */
-    function getEffectiveSetAccessorTypeAnnotationNode(node: SetAccessorDeclaration): TypeNode | undefined;
-    function emitNewLineBeforeLeadingComments(lineMap: ReadonlyArray<number>, writer: EmitTextWriter, node: TextRange, leadingComments: ReadonlyArray<CommentRange> | undefined): void;
-    function emitNewLineBeforeLeadingCommentsOfPosition(lineMap: ReadonlyArray<number>, writer: EmitTextWriter, pos: number, leadingComments: ReadonlyArray<CommentRange> | undefined): void;
-    function emitNewLineBeforeLeadingCommentOfPosition(lineMap: ReadonlyArray<number>, writer: EmitTextWriter, pos: number, commentPos: number): void;
-    function emitComments(text: string, lineMap: ReadonlyArray<number>, writer: EmitTextWriter, comments: ReadonlyArray<CommentRange> | undefined, leadingSeparator: boolean, trailingSeparator: boolean, newLine: string, writeComment: (text: string, lineMap: ReadonlyArray<number>, writer: EmitTextWriter, commentPos: number, commentEnd: number, newLine: string) => void): void;
-    /**
-     * Detached comment is a comment at the top of file or function body that is separated from
-     * the next statement by space.
-     */
-    function emitDetachedComments(text: string, lineMap: ReadonlyArray<number>, writer: EmitTextWriter, writeComment: (text: string, lineMap: ReadonlyArray<number>, writer: EmitTextWriter, commentPos: number, commentEnd: number, newLine: string) => void, node: TextRange, newLine: string, removeComments: boolean): {
-        nodePos: number;
-        detachedCommentEndPos: number;
-    } | undefined;
-    function writeCommentRange(text: string, lineMap: ReadonlyArray<number>, writer: EmitTextWriter, commentPos: number, commentEnd: number, newLine: string): void;
-    function hasModifiers(node: Node): boolean;
-    function hasModifier(node: Node, flags: ModifierFlags): boolean;
-    function hasStaticModifier(node: Node): boolean;
-    function hasReadonlyModifier(node: Node): boolean;
-    function getSelectedModifierFlags(node: Node, flags: ModifierFlags): ModifierFlags;
-    function getModifierFlags(node: Node): ModifierFlags;
-    function getModifierFlagsNoCache(node: Node): ModifierFlags;
-    function modifierToFlag(token: SyntaxKind): ModifierFlags;
-    function isLogicalOperator(token: SyntaxKind): boolean;
-    function isAssignmentOperator(token: SyntaxKind): boolean;
-    /** Get `C` given `N` if `N` is in the position `class C extends N` where `N` is an ExpressionWithTypeArguments. */
-    function tryGetClassExtendingExpressionWithTypeArguments(node: Node): ClassLikeDeclaration | undefined;
-    function isAssignmentExpression(node: Node, excludeCompoundAssignment: true): node is AssignmentExpression<EqualsToken>;
-    function isAssignmentExpression(node: Node, excludeCompoundAssignment?: false): node is AssignmentExpression<AssignmentOperatorToken>;
-    function isDestructuringAssignment(node: Node): node is DestructuringAssignment;
-    function isExpressionWithTypeArgumentsInClassExtendsClause(node: Node): boolean;
-    function isExpressionWithTypeArgumentsInClassImplementsClause(node: Node): node is ExpressionWithTypeArguments;
-    function isEntityNameExpression(node: Node): node is EntityNameExpression;
-    function isPropertyAccessEntityNameExpression(node: Node): node is PropertyAccessEntityNameExpression;
-    function isPrototypeAccess(node: Node): node is PropertyAccessExpression;
-    function isRightSideOfQualifiedNameOrPropertyAccess(node: Node): boolean;
-    function isEmptyObjectLiteral(expression: Node): boolean;
-    function isEmptyArrayLiteral(expression: Node): boolean;
-    function getLocalSymbolForExportDefault(symbol: Symbol): Symbol | undefined;
-    /** Return ".ts", ".d.ts", or ".tsx", if that is the extension. */
-    function tryExtractTypeScriptExtension(fileName: string): string | undefined;
-    /**
-     * Converts a string to a base-64 encoded ASCII string.
-     */
-    function convertToBase64(input: string): string;
-    function base64encode(host: {
-        base64encode?(input: string): string;
-    } | undefined, input: string): string;
-    function base64decode(host: {
-        base64decode?(input: string): string;
-    } | undefined, input: string): string;
-    function getNewLineCharacter(options: CompilerOptions | PrinterOptions, getNewLine?: () => string): string;
-    function formatSyntaxKind(kind: SyntaxKind | undefined): string;
-    function formatModifierFlags(flags: ModifierFlags | undefined): string;
-    function formatTransformFlags(flags: TransformFlags | undefined): string;
-    function formatEmitFlags(flags: EmitFlags | undefined): string;
-    function formatSymbolFlags(flags: SymbolFlags | undefined): string;
-    function formatTypeFlags(flags: TypeFlags | undefined): string;
-    function formatObjectFlags(flags: ObjectFlags | undefined): string;
-    /**
-     * Creates a new TextRange from the provided pos and end.
-     *
-     * @param pos The start position.
-     * @param end The end position.
-     */
-    function createRange(pos: number, end: number): TextRange;
-    /**
-     * Creates a new TextRange from a provided range with a new end position.
-     *
-     * @param range A TextRange.
-     * @param end The new end position.
-     */
-    function moveRangeEnd(range: TextRange, end: number): TextRange;
-    /**
-     * Creates a new TextRange from a provided range with a new start position.
-     *
-     * @param range A TextRange.
-     * @param pos The new Start position.
-     */
-    function moveRangePos(range: TextRange, pos: number): TextRange;
-    /**
-     * Moves the start position of a range past any decorators.
-     */
-    function moveRangePastDecorators(node: Node): TextRange;
-    /**
-     * Moves the start position of a range past any decorators or modifiers.
-     */
-    function moveRangePastModifiers(node: Node): TextRange;
-    /**
-     * Determines whether a TextRange has the same start and end positions.
-     *
-     * @param range A TextRange.
-     */
-    function isCollapsedRange(range: TextRange): boolean;
-    /**
-     * Creates a new TextRange for a token at the provides start position.
-     *
-     * @param pos The start position.
-     * @param token The token.
-     */
-    function createTokenRange(pos: number, token: SyntaxKind): TextRange;
-    function rangeIsOnSingleLine(range: TextRange, sourceFile: SourceFile): boolean;
-    function rangeStartPositionsAreOnSameLine(range1: TextRange, range2: TextRange, sourceFile: SourceFile): boolean;
-    function rangeEndPositionsAreOnSameLine(range1: TextRange, range2: TextRange, sourceFile: SourceFile): boolean;
-    function rangeStartIsOnSameLineAsRangeEnd(range1: TextRange, range2: TextRange, sourceFile: SourceFile): boolean;
-    function rangeEndIsOnSameLineAsRangeStart(range1: TextRange, range2: TextRange, sourceFile: SourceFile): boolean;
-    function positionsAreOnSameLine(pos1: number, pos2: number, sourceFile: SourceFile): boolean;
-    function getStartPositionOfRange(range: TextRange, sourceFile: SourceFile): number;
-    /**
-     * Determines whether a name was originally the declaration name of an enum or namespace
-     * declaration.
-     */
-    function isDeclarationNameOfEnumOrNamespace(node: Identifier): boolean;
-    function getInitializedVariables(node: VariableDeclarationList): ReadonlyArray<VariableDeclaration>;
-    function isWatchSet(options: CompilerOptions): boolean | undefined;
-    function getCheckFlags(symbol: Symbol): CheckFlags;
-    function getDeclarationModifierFlagsFromSymbol(s: Symbol): ModifierFlags;
-    function skipAlias(symbol: Symbol, checker: TypeChecker): Symbol;
-    /** See comment on `declareModuleMember` in `binder.ts`. */
-    function getCombinedLocalAndExportSymbolFlags(symbol: Symbol): SymbolFlags;
-    function isWriteOnlyAccess(node: Node): boolean;
-    function isWriteAccess(node: Node): boolean;
-    function compareDataObjects(dst: any, src: any): boolean;
-    /**
-     * clears already present map by calling onDeleteExistingValue callback before deleting that key/value
-     */
-    function clearMap<T>(map: Map<T>, onDeleteValue: (valueInMap: T, key: string) => void): void;
-    interface MutateMapOptions<T, U> {
-        createNewValue(key: string, valueInNewMap: U): T;
-        onDeleteValue(existingValue: T, key: string): void;
-        /**
-         * If present this is called with the key when there is value for that key both in new map as well as existing map provided
-         * Caller can then decide to update or remove this key.
-         * If the key is removed, caller will get callback of createNewValue for that key.
-         * If this callback is not provided, the value of such keys is not updated.
-         */
-        onExistingValue?(existingValue: T, valueInNewMap: U, key: string): void;
-    }
-    /**
-     * Mutates the map with newMap such that keys in map will be same as newMap.
-     */
-    function mutateMap<T, U>(map: Map<T>, newMap: ReadonlyMap<U>, options: MutateMapOptions<T, U>): void;
-    /** Calls `callback` on `directory` and every ancestor directory it has, returning the first defined result. */
-    function forEachAncestorDirectory<T>(directory: string, callback: (directory: string) => T | undefined): T | undefined;
-    function isAbstractConstructorType(type: Type): boolean;
-    function isAbstractConstructorSymbol(symbol: Symbol): boolean;
-    function getClassLikeDeclarationOfSymbol(symbol: Symbol): ClassLikeDeclaration | undefined;
-    function getObjectFlags(type: Type): ObjectFlags;
-    function typeHasCallOrConstructSignatures(type: Type, checker: TypeChecker): boolean;
-    function forSomeAncestorDirectory(directory: string, callback: (directory: string) => boolean): boolean;
-    function isUMDExportSymbol(symbol: Symbol | undefined): boolean | undefined;
-    function showModuleSpecifier({ moduleSpecifier }: ImportDeclaration): string;
-    function getLastChild(node: Node): Node | undefined;
-    /** Add a value to a set, and return true if it wasn't already present. */
-    function addToSeen(seen: Map<true>, key: string | number): boolean;
-    function addToSeen<T>(seen: Map<T>, key: string | number, value: T): boolean;
-    function isObjectTypeDeclaration(node: Node): node is ObjectTypeDeclaration;
 }
 declare namespace ts {
     function getDefaultLibFileName(options: CompilerOptions): string;
@@ -6618,7 +3132,6 @@ declare namespace ts {
     function textSpanIntersectsWithPosition(span: TextSpan, position: number): boolean;
     function textSpanIntersection(span1: TextSpan, span2: TextSpan): TextSpan | undefined;
     function createTextSpan(start: number, length: number): TextSpan;
-    function createTextRange(pos: number, end?: number): TextRange;
     function createTextSpanFromBounds(start: number, end: number): TextSpan;
     function textChangeRangeNewSpan(range: TextChangeRange): TextSpan;
     function textChangeRangeIsUnchanged(range: TextChangeRange): boolean;
@@ -6695,10 +3208,6 @@ declare namespace ts {
      */
     function unescapeIdentifier(id: string): string;
     function getNameOfJSDocTypedef(declaration: JSDocTypedefTag): Identifier | undefined;
-    /** @internal */
-    function isNamedDeclaration(node: Node): node is NamedDeclaration & {
-        name: DeclarationName;
-    };
     function getNameOfDeclaration(declaration: Declaration | Expression): DeclarationName;
     /**
      * Gets the JSDoc parameter tags for the node if present.
@@ -6725,6 +3234,8 @@ declare namespace ts {
     function getJSDocAugmentsTag(node: Node): JSDocAugmentsTag | undefined;
     /** Gets the JSDoc class tag for the node if present */
     function getJSDocClassTag(node: Node): JSDocClassTag | undefined;
+    /** Gets the JSDoc this tag for the node if present */
+    function getJSDocThisTag(node: Node): JSDocThisTag | undefined;
     /** Gets the JSDoc return tag for the node if present */
     function getJSDocReturnTag(node: Node): JSDocReturnTag | undefined;
     /** Gets the JSDoc template tag for the node if present */
@@ -6780,7 +3291,6 @@ declare namespace ts {
     function isCallSignatureDeclaration(node: Node): node is CallSignatureDeclaration;
     function isConstructSignatureDeclaration(node: Node): node is ConstructSignatureDeclaration;
     function isIndexSignatureDeclaration(node: Node): node is IndexSignatureDeclaration;
-    function isGetOrSetAccessorDeclaration(node: Node): node is AccessorDeclaration;
     function isTypePredicateNode(node: Node): node is TypePredicateNode;
     function isTypeReferenceNode(node: Node): node is TypeReferenceNode;
     function isFunctionTypeNode(node: Node): node is FunctionTypeNode;
@@ -6911,6 +3421,7 @@ declare namespace ts {
     function isJSDoc(node: Node): node is JSDoc;
     function isJSDocAugmentsTag(node: Node): node is JSDocAugmentsTag;
     function isJSDocClassTag(node: Node): node is JSDocClassTag;
+    function isJSDocThisTag(node: Node): node is JSDocThisTag;
     function isJSDocParameterTag(node: Node): node is JSDocParameterTag;
     function isJSDocReturnTag(node: Node): node is JSDocReturnTag;
     function isJSDocTypeTag(node: Node): node is JSDocTypeTag;
@@ -6923,39 +3434,25 @@ declare namespace ts {
     function isJSDocSignature(node: Node): node is JSDocSignature;
 }
 declare namespace ts {
-    function isSyntaxList(n: Node): n is SyntaxList;
-    function isNode(node: Node): boolean;
-    function isNodeKind(kind: SyntaxKind): boolean;
     /**
      * True if node is of some token syntax kind.
      * For example, this is true for an IfKeyword but not for an IfStatement.
      * Literals are considered tokens, except TemplateLiteral, but does include TemplateHead/Middle/Tail.
      */
     function isToken(n: Node): boolean;
-    function isNodeArray<T extends Node>(array: ReadonlyArray<T>): array is NodeArray<T>;
-    function isLiteralKind(kind: SyntaxKind): boolean;
     function isLiteralExpression(node: Node): node is LiteralExpression;
-    function isTemplateLiteralKind(kind: SyntaxKind): boolean;
     type TemplateLiteralToken = NoSubstitutionTemplateLiteral | TemplateHead | TemplateMiddle | TemplateTail;
     function isTemplateLiteralToken(node: Node): node is TemplateLiteralToken;
     function isTemplateMiddleOrTemplateTail(node: Node): node is TemplateMiddle | TemplateTail;
     function isStringTextContainingNode(node: Node): node is StringLiteral | TemplateLiteralToken;
-    function isGeneratedIdentifier(node: Node): node is GeneratedIdentifier;
-    function isModifierKind(token: SyntaxKind): boolean;
-    function isParameterPropertyModifier(kind: SyntaxKind): boolean;
-    function isClassMemberModifier(idToken: SyntaxKind): boolean;
     function isModifier(node: Node): node is Modifier;
     function isEntityName(node: Node): node is EntityName;
     function isPropertyName(node: Node): node is PropertyName;
     function isBindingName(node: Node): node is BindingName;
     function isFunctionLike(node: Node): node is SignatureDeclaration;
-    function isFunctionLikeDeclaration(node: Node): node is FunctionLikeDeclaration;
-    function isFunctionLikeKind(kind: SyntaxKind): boolean;
-    function isFunctionOrModuleBlock(node: Node): boolean;
     function isClassElement(node: Node): node is ClassElement;
     function isClassLike(node: Node): node is ClassLikeDeclaration;
     function isAccessor(node: Node): node is AccessorDeclaration;
-    function isMethodOrAccessor(node: Node): node is MethodDeclaration | AccessorDeclaration;
     function isTypeElement(node: Node): node is TypeElement;
     function isClassOrTypeElement(node: Node): node is ClassElement | TypeElement;
     function isObjectLiteralElementLike(node: Node): node is ObjectLiteralElementLike;
@@ -6966,400 +3463,24 @@ declare namespace ts {
      */
     function isTypeNode(node: Node): node is TypeNode;
     function isFunctionOrConstructorTypeNode(node: Node): node is FunctionTypeNode | ConstructorTypeNode;
-    function isBindingPattern(node: Node | undefined): node is BindingPattern;
-    function isAssignmentPattern(node: Node): node is AssignmentPattern;
-    function isArrayBindingElement(node: Node): node is ArrayBindingElement;
-    /**
-     * Determines whether the BindingOrAssignmentElement is a BindingElement-like declaration
-     */
-    function isDeclarationBindingElement(bindingElement: BindingOrAssignmentElement): bindingElement is VariableDeclaration | ParameterDeclaration | BindingElement;
-    /**
-     * Determines whether a node is a BindingOrAssignmentPattern
-     */
-    function isBindingOrAssignmentPattern(node: BindingOrAssignmentElementTarget): node is BindingOrAssignmentPattern;
-    /**
-     * Determines whether a node is an ObjectBindingOrAssignmentPattern
-     */
-    function isObjectBindingOrAssignmentPattern(node: BindingOrAssignmentElementTarget): node is ObjectBindingOrAssignmentPattern;
-    /**
-     * Determines whether a node is an ArrayBindingOrAssignmentPattern
-     */
-    function isArrayBindingOrAssignmentPattern(node: BindingOrAssignmentElementTarget): node is ArrayBindingOrAssignmentPattern;
-    function isPropertyAccessOrQualifiedNameOrImportTypeNode(node: Node): node is PropertyAccessExpression | QualifiedName | ImportTypeNode;
     function isPropertyAccessOrQualifiedName(node: Node): node is PropertyAccessExpression | QualifiedName;
     function isCallLikeExpression(node: Node): node is CallLikeExpression;
     function isCallOrNewExpression(node: Node): node is CallExpression | NewExpression;
     function isTemplateLiteral(node: Node): node is TemplateLiteral;
-    function isLeftHandSideExpression(node: Node): node is LeftHandSideExpression;
-    function isUnaryExpression(node: Node): node is UnaryExpression;
-    function isUnaryExpressionWithWrite(expr: Node): expr is PrefixUnaryExpression | PostfixUnaryExpression;
-    /**
-     * Determines whether a node is an expression based only on its kind.
-     * Use `isExpressionNode` if not in transforms.
-     */
-    function isExpression(node: Node): node is Expression;
     function isAssertionExpression(node: Node): node is AssertionExpression;
-    function isPartiallyEmittedExpression(node: Node): node is PartiallyEmittedExpression;
-    function isNotEmittedStatement(node: Node): node is NotEmittedStatement;
-    function isNotEmittedOrPartiallyEmittedNode(node: Node): node is NotEmittedStatement | PartiallyEmittedExpression;
     function isIterationStatement(node: Node, lookInLabeledStatements: false): node is IterationStatement;
     function isIterationStatement(node: Node, lookInLabeledStatements: boolean): node is IterationStatement | LabeledStatement;
-    function isForInOrOfStatement(node: Node): node is ForInOrOfStatement;
-    function isConciseBody(node: Node): node is ConciseBody;
-    function isFunctionBody(node: Node): node is FunctionBody;
-    function isForInitializer(node: Node): node is ForInitializer;
-    function isModuleBody(node: Node): node is ModuleBody;
-    function isNamespaceBody(node: Node): node is NamespaceBody;
-    function isJSDocNamespaceBody(node: Node): node is JSDocNamespaceBody;
-    function isNamedImportBindings(node: Node): node is NamedImportBindings;
-    function isModuleOrEnumDeclaration(node: Node): node is ModuleDeclaration | EnumDeclaration;
-    function isDeclaration(node: Node): node is NamedDeclaration;
-    function isDeclarationStatement(node: Node): node is DeclarationStatement;
-    /**
-     * Determines whether the node is a statement that is not also a declaration
-     */
-    function isStatementButNotDeclaration(node: Node): node is Statement;
-    function isStatement(node: Node): node is Statement;
-    function isModuleReference(node: Node): node is ModuleReference;
-    function isJsxTagNameExpression(node: Node): node is JsxTagNameExpression;
-    function isJsxChild(node: Node): node is JsxChild;
-    function isJsxAttributeLike(node: Node): node is JsxAttributeLike;
-    function isStringLiteralOrJsxExpression(node: Node): node is StringLiteral | JsxExpression;
     function isJsxOpeningLikeElement(node: Node): node is JsxOpeningLikeElement;
     function isCaseOrDefaultClause(node: Node): node is CaseOrDefaultClause;
-    /** True if node is of some JSDoc syntax kind. */
-    function isJSDocNode(node: Node): boolean;
     /** True if node is of a kind that may contain comment text. */
     function isJSDocCommentContainingNode(node: Node): boolean;
-    function isJSDocTag(node: Node): boolean;
     function isSetAccessor(node: Node): node is SetAccessorDeclaration;
     function isGetAccessor(node: Node): node is GetAccessorDeclaration;
-    /** True if has jsdoc nodes attached to it. */
-    function hasJSDocNodes(node: Node): node is HasJSDoc;
-    /** True if has type node attached to it. */
-    function hasType(node: Node): node is HasType;
-    function couldHaveType(node: Node): node is HasType;
-    /** True if has initializer node attached to it. */
-    function hasInitializer(node: Node): node is HasInitializer;
-    /** True if has initializer node attached to it. */
-    function hasOnlyExpressionInitializer(node: Node): node is HasExpressionInitializer;
     function isObjectLiteralElement(node: Node): node is ObjectLiteralElement;
-    function isTypeReferenceType(node: Node): node is TypeReferenceType;
-    function guessIndentation(lines: string[]): number | undefined;
     function isStringLiteralLike(node: Node): node is StringLiteralLike;
-    /** @internal */
-    function isNamedImportsOrExports(node: Node): node is NamedImportsOrExports;
-    interface ObjectAllocator {
-        getNodeConstructor(): new (kind: SyntaxKind, pos?: number, end?: number) => Node;
-        getTokenConstructor(): new <TKind extends SyntaxKind>(kind: TKind, pos?: number, end?: number) => Token<TKind>;
-        getIdentifierConstructor(): new (kind: SyntaxKind.Identifier, pos?: number, end?: number) => Identifier;
-        getSourceFileConstructor(): new (kind: SyntaxKind.SourceFile, pos?: number, end?: number) => SourceFile;
-        getSymbolConstructor(): new (flags: SymbolFlags, name: __String) => Symbol;
-        getTypeConstructor(): new (checker: TypeChecker, flags: TypeFlags) => Type;
-        getSignatureConstructor(): new (checker: TypeChecker) => Signature;
-        getSourceMapSourceConstructor(): new (fileName: string, text: string, skipTrivia?: (pos: number) => number) => SourceMapSource;
-    }
-    let objectAllocator: ObjectAllocator;
-    function formatStringFromArgs(text: string, args: ArrayLike<string>, baseIndex?: number): string;
-    let localizedDiagnosticMessages: MapLike<string> | undefined;
-    function getLocaleSpecificMessage(message: DiagnosticMessage): string;
-    function createFileDiagnostic(file: SourceFile, start: number, length: number, message: DiagnosticMessage, ...args: (string | number | undefined)[]): DiagnosticWithLocation;
-    function formatMessage(_dummy: any, message: DiagnosticMessage): string;
-    function createCompilerDiagnostic(message: DiagnosticMessage, ...args: (string | number | undefined)[]): Diagnostic;
-    function createCompilerDiagnosticFromMessageChain(chain: DiagnosticMessageChain): Diagnostic;
-    function chainDiagnosticMessages(details: DiagnosticMessageChain | undefined, message: DiagnosticMessage, ...args: (string | undefined)[]): DiagnosticMessageChain;
-    function concatenateDiagnosticMessageChains(headChain: DiagnosticMessageChain, tailChain: DiagnosticMessageChain): DiagnosticMessageChain;
-    function compareDiagnostics(d1: Diagnostic, d2: Diagnostic): Comparison;
-    function getEmitScriptTarget(compilerOptions: CompilerOptions): ScriptTarget;
-    function getEmitModuleKind(compilerOptions: {
-        module?: CompilerOptions["module"];
-        target?: CompilerOptions["target"];
-    }): ModuleKind;
-    function getEmitModuleResolutionKind(compilerOptions: CompilerOptions): ModuleResolutionKind;
-    function unreachableCodeIsError(options: CompilerOptions): boolean;
-    function unusedLabelIsError(options: CompilerOptions): boolean;
-    function getAreDeclarationMapsEnabled(options: CompilerOptions): boolean;
-    function getAllowSyntheticDefaultImports(compilerOptions: CompilerOptions): boolean;
-    function getEmitDeclarations(compilerOptions: CompilerOptions): boolean;
-    type StrictOptionName = "noImplicitAny" | "noImplicitThis" | "strictNullChecks" | "strictFunctionTypes" | "strictPropertyInitialization" | "alwaysStrict";
-    function getStrictOptionValue(compilerOptions: CompilerOptions, flag: StrictOptionName): boolean;
-    function hasZeroOrOneAsteriskCharacter(str: string): boolean;
-    /**
-     * Internally, we represent paths as strings with '/' as the directory separator.
-     * When we make system calls (eg: LanguageServiceHost.getDirectory()),
-     * we expect the host to correctly handle paths in our specified format.
-     */
-    const directorySeparator = "/";
-    /**
-     * Normalize path separators.
-     */
-    function normalizeSlashes(path: string): string;
-    /**
-     * Returns length of the root part of a path or URL (i.e. length of "/", "x:/", "//server/share/, file:///user/files").
-     *
-     * For example:
-     * ```ts
-     * getRootLength("a") === 0                   // ""
-     * getRootLength("/") === 1                   // "/"
-     * getRootLength("c:") === 2                  // "c:"
-     * getRootLength("c:d") === 0                 // ""
-     * getRootLength("c:/") === 3                 // "c:/"
-     * getRootLength("c:\\") === 3                // "c:\\"
-     * getRootLength("//server") === 7            // "//server"
-     * getRootLength("//server/share") === 8      // "//server/"
-     * getRootLength("\\\\server") === 7          // "\\\\server"
-     * getRootLength("\\\\server\\share") === 8   // "\\\\server\\"
-     * getRootLength("file:///path") === 8        // "file:///"
-     * getRootLength("file:///c:") === 10         // "file:///c:"
-     * getRootLength("file:///c:d") === 8         // "file:///"
-     * getRootLength("file:///c:/path") === 11    // "file:///c:/"
-     * getRootLength("file://server") === 13      // "file://server"
-     * getRootLength("file://server/path") === 14 // "file://server/"
-     * getRootLength("http://server") === 13      // "http://server"
-     * getRootLength("http://server/path") === 14 // "http://server/"
-     * ```
-     */
-    function getRootLength(path: string): number;
-    function normalizePath(path: string): string;
-    function normalizePathAndParts(path: string): {
-        path: string;
-        parts: string[];
-    };
-    /**
-     * Returns the path except for its basename. Semantics align with NodeJS's `path.dirname`
-     * except that we support URL's as well.
-     *
-     * ```ts
-     * getDirectoryPath("/path/to/file.ext") === "/path/to"
-     * getDirectoryPath("/path/to/") === "/path"
-     * getDirectoryPath("/") === "/"
-     * ```
-     */
-    function getDirectoryPath(path: Path): Path;
-    /**
-     * Returns the path except for its basename. Semantics align with NodeJS's `path.dirname`
-     * except that we support URL's as well.
-     *
-     * ```ts
-     * getDirectoryPath("/path/to/file.ext") === "/path/to"
-     * getDirectoryPath("/path/to/") === "/path"
-     * getDirectoryPath("/") === "/"
-     * ```
-     */
-    function getDirectoryPath(path: string): string;
-    function isUrl(path: string): boolean;
-    function pathIsRelative(path: string): boolean;
-    /**
-     * Determines whether a path is an absolute path (e.g. starts with `/`, or a dos path
-     * like `c:`, `c:\` or `c:/`).
-     */
-    function isRootedDiskPath(path: string): boolean;
-    /**
-     * Determines whether a path consists only of a path root.
-     */
-    function isDiskPathRoot(path: string): boolean;
-    function convertToRelativePath(absoluteOrRelativePath: string, basePath: string, getCanonicalFileName: (path: string) => string): string;
-    /**
-     * Parse a path into an array containing a root component (at index 0) and zero or more path
-     * components (at indices > 0). The result is not normalized.
-     * If the path is relative, the root component is `""`.
-     * If the path is absolute, the root component includes the first path separator (`/`).
-     */
-    function getPathComponents(path: string, currentDirectory?: string): string[];
-    /**
-     * Reduce an array of path components to a more simplified path by navigating any
-     * `"."` or `".."` entries in the path.
-     */
-    function reducePathComponents(components: ReadonlyArray<string>): string[];
-    /**
-     * Parse a path into an array containing a root component (at index 0) and zero or more path
-     * components (at indices > 0). The result is normalized.
-     * If the path is relative, the root component is `""`.
-     * If the path is absolute, the root component includes the first path separator (`/`).
-     */
-    function getNormalizedPathComponents(path: string, currentDirectory: string | undefined): string[];
-    function getNormalizedAbsolutePath(fileName: string, currentDirectory: string | undefined): string;
-    /**
-     * Formats a parsed path consisting of a root component (at index 0) and zero or more path
-     * segments (at indices > 0).
-     */
-    function getPathFromPathComponents(pathComponents: ReadonlyArray<string>): string;
-    function getRelativePathFromFile(from: string, to: string, getCanonicalFileName: GetCanonicalFileName): string;
-    /**
-     * Gets a relative path that can be used to traverse between `from` and `to`.
-     */
-    function getRelativePathFromDirectory(from: string, to: string, ignoreCase: boolean): string;
-    /**
-     * Gets a relative path that can be used to traverse between `from` and `to`.
-     */
-    function getRelativePathFromDirectory(fromDirectory: string, to: string, getCanonicalFileName: GetCanonicalFileName): string;
-    function getRelativePathToDirectoryOrUrl(directoryPathOrUrl: string, relativeOrAbsolutePath: string, currentDirectory: string, getCanonicalFileName: GetCanonicalFileName, isAbsolutePathAnUrl: boolean): string;
-    /**
-     * Ensures a path is either absolute (prefixed with `/` or `c:`) or dot-relative (prefixed
-     * with `./` or `../`) so as not to be confused with an unprefixed module name.
-     */
-    function ensurePathIsNonModuleName(path: string): string;
-    /**
-     * Returns the path except for its containing directory name.
-     * Semantics align with NodeJS's `path.basename` except that we support URL's as well.
-     *
-     * ```ts
-     * getBaseFileName("/path/to/file.ext") === "file.ext"
-     * getBaseFileName("/path/to/") === "to"
-     * getBaseFileName("/") === ""
-     * ```
-     */
-    function getBaseFileName(path: string): string;
-    /**
-     * Gets the portion of a path following the last (non-terminal) separator (`/`).
-     * Semantics align with NodeJS's `path.basename` except that we support URL's as well.
-     * If the base name has any one of the provided extensions, it is removed.
-     *
-     * ```ts
-     * getBaseFileName("/path/to/file.ext", ".ext", true) === "file"
-     * getBaseFileName("/path/to/file.js", ".ext", true) === "file.js"
-     * ```
-     */
-    function getBaseFileName(path: string, extensions: string | ReadonlyArray<string>, ignoreCase: boolean): string;
-    /**
-     * Combines paths. If a path is absolute, it replaces any previous path.
-     */
-    function combinePaths(path: string, ...paths: (string | undefined)[]): string;
-    /**
-     * Combines and resolves paths. If a path is absolute, it replaces any previous path. Any
-     * `.` and `..` path components are resolved.
-     */
-    function resolvePath(path: string, ...paths: (string | undefined)[]): string;
-    /**
-     * Determines whether a path has a trailing separator (`/` or `\\`).
-     */
-    function hasTrailingDirectorySeparator(path: string): boolean;
-    /**
-     * Removes a trailing directory separator from a path.
-     * @param path The path.
-     */
-    function removeTrailingDirectorySeparator(path: Path): Path;
-    function removeTrailingDirectorySeparator(path: string): string;
-    /**
-     * Adds a trailing directory separator to a path, if it does not already have one.
-     * @param path The path.
-     */
-    function ensureTrailingDirectorySeparator(path: Path): Path;
-    function ensureTrailingDirectorySeparator(path: string): string;
-    /**
-     * Performs a case-sensitive comparison of two paths.
-     */
-    function comparePathsCaseSensitive(a: string, b: string): Comparison;
-    /**
-     * Performs a case-insensitive comparison of two paths.
-     */
-    function comparePathsCaseInsensitive(a: string, b: string): Comparison;
-    function comparePaths(a: string, b: string, ignoreCase?: boolean): Comparison;
-    function comparePaths(a: string, b: string, currentDirectory: string, ignoreCase?: boolean): Comparison;
-    function containsPath(parent: string, child: string, ignoreCase?: boolean): boolean;
-    function containsPath(parent: string, child: string, currentDirectory: string, ignoreCase?: boolean): boolean;
-    function tryRemoveDirectoryPrefix(path: string, dirPath: string): string | undefined;
-    function hasExtension(fileName: string): boolean;
-    const commonPackageFolders: ReadonlyArray<string>;
-    function getRegularExpressionForWildcard(specs: ReadonlyArray<string> | undefined, basePath: string, usage: "files" | "directories" | "exclude"): string | undefined;
-    /**
-     * An "includes" path "foo" is implicitly a glob "foo/** /*" (without the space) if its last component has no extension,
-     * and does not contain any glob characters itself.
-     */
-    function isImplicitGlob(lastPathComponent: string): boolean;
-    interface FileSystemEntries {
-        readonly files: ReadonlyArray<string>;
-        readonly directories: ReadonlyArray<string>;
-    }
-    interface FileMatcherPatterns {
-        /** One pattern for each "include" spec. */
-        includeFilePatterns: ReadonlyArray<string> | undefined;
-        /** One pattern matching one of any of the "include" specs. */
-        includeFilePattern: string | undefined;
-        includeDirectoryPattern: string | undefined;
-        excludePattern: string | undefined;
-        basePaths: ReadonlyArray<string>;
-    }
-    /** @param path directory of the tsconfig.json */
-    function getFileMatcherPatterns(path: string, excludes: ReadonlyArray<string> | undefined, includes: ReadonlyArray<string> | undefined, useCaseSensitiveFileNames: boolean, currentDirectory: string): FileMatcherPatterns;
-    function getRegexFromPattern(pattern: string, useCaseSensitiveFileNames: boolean): RegExp;
-    /** @param path directory of the tsconfig.json */
-    function matchFiles(path: string, extensions: ReadonlyArray<string> | undefined, excludes: ReadonlyArray<string> | undefined, includes: ReadonlyArray<string> | undefined, useCaseSensitiveFileNames: boolean, currentDirectory: string, depth: number | undefined, getFileSystemEntries: (path: string) => FileSystemEntries): string[];
-    function ensureScriptKind(fileName: string, scriptKind: ScriptKind | undefined): ScriptKind;
-    function getScriptKindFromFileName(fileName: string): ScriptKind;
-    /**
-     *  List of supported extensions in order of file resolution precedence.
-     */
-    const supportedTypeScriptExtensions: ReadonlyArray<Extension>;
-    /** Must have ".d.ts" first because if ".ts" goes first, that will be detected as the extension instead of ".d.ts". */
-    const supportedTypescriptExtensionsForExtractExtension: ReadonlyArray<Extension>;
-    const supportedJavascriptExtensions: ReadonlyArray<Extension>;
-    function getSupportedExtensions(options?: CompilerOptions, extraFileExtensions?: ReadonlyArray<FileExtensionInfo>): ReadonlyArray<string>;
-    function hasJavaScriptFileExtension(fileName: string): boolean;
-    function hasTypeScriptFileExtension(fileName: string): boolean;
-    function isSupportedSourceFileName(fileName: string, compilerOptions?: CompilerOptions, extraFileExtensions?: ReadonlyArray<FileExtensionInfo>): boolean;
-    /**
-     * Extension boundaries by priority. Lower numbers indicate higher priorities, and are
-     * aligned to the offset of the highest priority extension in the
-     * allSupportedExtensions array.
-     */
-    enum ExtensionPriority {
-        TypeScriptFiles = 0,
-        DeclarationAndJavaScriptFiles = 2,
-        Highest = 0,
-        Lowest = 2
-    }
-    function getExtensionPriority(path: string, supportedExtensions: ReadonlyArray<string>): ExtensionPriority;
-    /**
-     * Adjusts an extension priority to be the highest priority within the same range.
-     */
-    function adjustExtensionPriority(extensionPriority: ExtensionPriority, supportedExtensions: ReadonlyArray<string>): ExtensionPriority;
-    /**
-     * Gets the next lowest extension priority for a given priority.
-     */
-    function getNextLowestExtensionPriority(extensionPriority: ExtensionPriority, supportedExtensions: ReadonlyArray<string>): ExtensionPriority;
-    function removeFileExtension(path: string): string;
-    function tryRemoveExtension(path: string, extension: string): string | undefined;
-    function removeExtension(path: string, extension: string): string;
-    function changeExtension<T extends string | Path>(path: T, newExtension: string): T;
-    function changeAnyExtension(path: string, ext: string): string;
-    function changeAnyExtension(path: string, ext: string, extensions: string | ReadonlyArray<string>, ignoreCase: boolean): string;
-    namespace Debug {
-        function showSymbol(symbol: Symbol): string;
-        function showSyntaxKind(node: Node): string;
-    }
-    function tryParsePattern(pattern: string): Pattern | undefined;
-    function positionIsSynthesized(pos: number): boolean;
-    /** True if an extension is one of the supported TypeScript extensions. */
-    function extensionIsTypeScript(ext: Extension): boolean;
-    function resolutionExtensionIsTypeScriptOrJson(ext: Extension): boolean;
-    /**
-     * Gets the extension from a path.
-     * Path must have a valid extension.
-     */
-    function extensionFromPath(path: string): Extension;
-    function isAnySupportedFileExtension(path: string): boolean;
-    function tryGetExtensionFromPath(path: string): Extension | undefined;
-    /**
-     * Gets the file extension for a path.
-     */
-    function getAnyExtensionFromPath(path: string): string;
-    /**
-     * Gets the file extension for a path, provided it is one of the provided extensions.
-     */
-    function getAnyExtensionFromPath(path: string, extensions: string | ReadonlyArray<string>, ignoreCase: boolean): string;
-    function isCheckJsEnabledForFile(sourceFile: SourceFile, compilerOptions: CompilerOptions): boolean | undefined;
-    const emptyFileSystemEntries: FileSystemEntries;
-    /**
-     * patternStrings contains both pattern strings (containing "*") and regular strings.
-     * Return an exact match if possible, or a pattern match, or undefined.
-     * (These are verified by verifyCompilerOptions to have 0 or 1 "*" characters.)
-     */
-    function matchPatternOrExact(patternStrings: ReadonlyArray<string>, candidate: string): string | Pattern | undefined;
 }
 declare namespace ts {
     function createNode(kind: SyntaxKind, pos?: number, end?: number): Node;
-    function isJSDocLikeText(text: string, start: number): boolean;
     /**
      * Invokes a callback for each child of the given node. The 'cbNode' callback is invoked for all child nodes
      * stored in properties. If a 'cbNodes' callback is specified, it is invoked for embedded arrays; otherwise,
@@ -7384,60 +3505,9 @@ declare namespace ts {
     function parseJsonText(fileName: string, sourceText: string): JsonSourceFile;
     function isExternalModule(file: SourceFile): boolean;
     function updateSourceFile(sourceFile: SourceFile, newText: string, textChangeRange: TextChangeRange, aggressiveChecks?: boolean): SourceFile;
-    function parseIsolatedJSDocComment(content: string, start?: number, length?: number): {
-        jsDoc: JSDoc;
-        diagnostics: Diagnostic[];
-    } | undefined;
-    function parseJSDocTypeExpressionForTests(content: string, start?: number, length?: number): {
-        jsDocTypeExpression: JSDocTypeExpression;
-        diagnostics: Diagnostic[];
-    } | undefined;
-    interface PragmaContext {
-        languageVersion: ScriptTarget;
-        pragmas?: PragmaMap;
-        checkJsDirective?: CheckJsDirective;
-        referencedFiles: FileReference[];
-        typeReferenceDirectives: FileReference[];
-        libReferenceDirectives: FileReference[];
-        amdDependencies: AmdDependency[];
-        hasNoDefaultLib?: boolean;
-        moduleName?: string;
-    }
-    function processCommentPragmas(context: PragmaContext, sourceText: string): void;
-    type PragmaDiagnosticReporter = (pos: number, length: number, message: DiagnosticMessage) => void;
-    function processPragmasIntoFields(context: PragmaContext, reportDiagnostic: PragmaDiagnosticReporter): void;
-    /** @internal */
-    function tagNamesAreEquivalent(lhs: JsxTagNameExpression, rhs: JsxTagNameExpression): boolean;
 }
 declare namespace ts {
-    const compileOnSaveCommandLineOption: CommandLineOption;
-    /**
-     * An array of supported "lib" reference file names used to determine the order for inclusion
-     * when referenced, as well as for spelling suggestions. This ensures the correct ordering for
-     * overload resolution when a type declared in one lib is extended by another.
-     */
-    const libs: string[];
-    /**
-     * A map of lib names to lib files. This map is used both for parsing the "lib" command line
-     * option as well as for resolving lib reference directives.
-     */
-    const libMap: Map<string>;
-    const optionDeclarations: CommandLineOption[];
-    const typeAcquisitionDeclarations: CommandLineOption[];
-    interface OptionNameMap {
-        optionNameMap: Map<CommandLineOption>;
-        shortOptionNames: Map<string>;
-    }
-    const defaultInitCompilerOptions: CompilerOptions;
-    function convertEnableAutoDiscoveryToEnable(typeAcquisition: TypeAcquisition): TypeAcquisition;
-    function createCompilerDiagnosticForInvalidCustomType(opt: CommandLineOptionOfCustomType): Diagnostic;
-    function parseCustomTypeOption(opt: CommandLineOptionOfCustomType, value: string, errors: Push<Diagnostic>): string | number | undefined;
-    function parseListTypeOption(opt: CommandLineOptionOfListType, value: string | undefined, errors: Push<Diagnostic>): (string | number)[] | undefined;
     function parseCommandLine(commandLine: ReadonlyArray<string>, readFile?: (path: string) => string | undefined): ParsedCommandLine;
-    /** @internal */
-    function getOptionFromName(optionName: string, allowShort?: boolean): CommandLineOption | undefined;
-    function printVersion(): void;
-    function printHelp(optionsList: CommandLineOption[], syntaxPrefix?: string): void;
     type DiagnosticReporter = (diagnostic: Diagnostic) => void;
     /**
      * Reports config file diagnostics
@@ -7480,49 +3550,10 @@ declare namespace ts {
      * @param fileName The path to the config file
      */
     function readJsonConfigFile(fileName: string, readFile: (path: string) => string | undefined): TsConfigSourceFile;
-    interface JsonConversionNotifier {
-        /**
-         * Notifies parent option object is being set with the optionKey and a valid optionValue
-         * Currently it notifies only if there is element with type object (parentOption) and
-         * has element's option declarations map associated with it
-         * @param parentOption parent option name in which the option and value are being set
-         * @param option option declaration which is being set with the value
-         * @param value value of the option
-         */
-        onSetValidOptionKeyValueInParent(parentOption: string, option: CommandLineOption, value: CompilerOptionsValue): void;
-        /**
-         * Notify when valid root key value option is being set
-         * @param key option key
-         * @param keyNode node corresponding to node in the source file
-         * @param value computed value of the key
-         * @param ValueNode node corresponding to value in the source file
-         */
-        onSetValidOptionKeyValueInRoot(key: string, keyNode: PropertyName, value: CompilerOptionsValue, valueNode: Expression): void;
-        /**
-         * Notify when unknown root key value option is being set
-         * @param key option key
-         * @param keyNode node corresponding to node in the source file
-         * @param value computed value of the key
-         * @param ValueNode node corresponding to value in the source file
-         */
-        onSetUnknownOptionKeyValueInRoot(key: string, keyNode: PropertyName, value: CompilerOptionsValue, valueNode: Expression): void;
-    }
     /**
      * Convert the json syntax tree into the json value
      */
     function convertToObject(sourceFile: JsonSourceFile, errors: Push<Diagnostic>): any;
-    /**
-     * Convert the json syntax tree into the json value and report errors
-     * This returns the json value (apart from checking errors) only if returnValue provided is true.
-     * Otherwise it just checks the errors and returns undefined
-     */
-    function convertToObjectWorker(sourceFile: JsonSourceFile, errors: Push<Diagnostic>, returnValue: boolean, knownRootOptions: CommandLineOption | undefined, jsonConversionNotifier: JsonConversionNotifier | undefined): any;
-    /**
-     * Generate tsconfig configuration when running command line "--init"
-     * @param options commandlineOptions to be generated into tsconfig.json
-     * @param fileNames array of filenames to be generated into tsconfig.json
-     */
-    function generateTSConfig(options: CompilerOptions, fileNames: ReadonlyArray<string>, newLine: string): string;
     /**
      * Parse the contents of a config file (tsconfig.json).
      * @param json The contents of the config file to parse
@@ -7539,9 +3570,6 @@ declare namespace ts {
      *    file to. e.g. outDir
      */
     function parseJsonSourceFileConfigFileContent(sourceFile: TsConfigSourceFile, host: ParseConfigHost, basePath: string, existingOptions?: CompilerOptions, configFileName?: string, resolutionStack?: Path[], extraFileExtensions?: ReadonlyArray<FileExtensionInfo>): ParsedCommandLine;
-    function setConfigFileInOptions(options: CompilerOptions, configFile: TsConfigSourceFile | undefined): void;
-    function isErrorNoInputFiles(error: Diagnostic): boolean;
-    function getErrorForNoInputFiles({ includeSpecs, excludeSpecs }: ConfigFileSpecs, configFileName: string | undefined): Diagnostic;
     function convertCompilerOptionsFromJson(jsonOptions: any, basePath: string, configFileName?: string): {
         options: CompilerOptions;
         errors: Diagnostic[];
@@ -7550,32 +3578,8 @@ declare namespace ts {
         options: TypeAcquisition;
         errors: Diagnostic[];
     };
-    /**
-     * Gets the file names from the provided config file specs that contain, files, include, exclude and
-     * other properties needed to resolve the file names
-     * @param spec The config file specs extracted with file names to include, wildcards to include/exclude and other details
-     * @param basePath The base path for any relative file specifications.
-     * @param options Compiler options.
-     * @param host The host used to resolve files and directories.
-     * @param extraFileExtensions optionaly file extra file extension information from host
-     */
-    function getFileNamesFromConfigSpecs(spec: ConfigFileSpecs, basePath: string, options: CompilerOptions, host: ParseConfigHost, extraFileExtensions?: ReadonlyArray<FileExtensionInfo>): ExpandResult;
-    /**
-     * Produces a cleaned version of compiler options with personally identifiying info (aka, paths) removed.
-     * Also converts enum values back to strings.
-     */
-    function convertCompilerOptionsForTelemetry(opts: CompilerOptions): CompilerOptions;
 }
 declare namespace ts {
-    function trace(host: ModuleResolutionHost, message: DiagnosticMessage, ...args: any[]): void;
-    function isTraceEnabled(compilerOptions: CompilerOptions, host: ModuleResolutionHost): boolean;
-    /** Array that is only intended to be pushed to, never read. */
-    interface Push<T> {
-        push(value: T): void;
-    }
-    function readJson(path: string, host: {
-        readFile(fileName: string): string | undefined;
-    }): object;
     function getEffectiveTypeRoots(options: CompilerOptions, host: GetEffectiveTypeRootsHost): string[] | undefined;
     /**
      * @param {string | undefined} containingFile - file that contains type reference directive, can be undefined if containing file is unknown.
@@ -7611,79 +3615,13 @@ declare namespace ts {
         set(directory: string, result: ResolvedModuleWithFailedLookupLocations): void;
     }
     function createModuleResolutionCache(currentDirectory: string, getCanonicalFileName: (s: string) => string): ModuleResolutionCache;
-    function createModuleResolutionCacheWithMaps(directoryToModuleNameMap: Map<Map<ResolvedModuleWithFailedLookupLocations>>, moduleNameToDirectoryMap: Map<PerModuleNameCache>, currentDirectory: string, getCanonicalFileName: GetCanonicalFileName): ModuleResolutionCache;
     function resolveModuleNameFromCache(moduleName: string, containingFile: string, cache: ModuleResolutionCache): ResolvedModuleWithFailedLookupLocations | undefined;
     function resolveModuleName(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost, cache?: ModuleResolutionCache): ResolvedModuleWithFailedLookupLocations;
     function nodeModuleNameResolver(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost, cache?: ModuleResolutionCache): ResolvedModuleWithFailedLookupLocations;
-    /**
-     * Expose resolution logic to allow us to use Node module resolution logic from arbitrary locations.
-     * No way to do this with `require()`: https://github.com/nodejs/node/issues/5963
-     * Throws an error if the module can't be resolved.
-     */
-    function resolveJavaScriptModule(moduleName: string, initialDir: string, host: ModuleResolutionHost): string;
-    function directoryProbablyExists(directoryName: string, host: {
-        directoryExists?: (directoryName: string) => boolean;
-    }): boolean;
-    function getPackageName(moduleName: string): {
-        packageName: string;
-        rest: string;
-    };
-    function getTypesPackageName(packageName: string): string;
-    function getMangledNameForScopedPackage(packageName: string): string;
-    function getPackageNameFromAtTypesDirectory(mangledName: string): string;
-    function getUnmangledNameForScopedPackage(typesPackageName: string): string;
     function classicNameResolver(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost, cache?: NonRelativeModuleNameResolutionCache): ResolvedModuleWithFailedLookupLocations;
-    /**
-     * LSHost may load a module from a global cache of typings.
-     * This is the minumum code needed to expose that functionality; the rest is in LSHost.
-     */
-    function loadModuleFromGlobalCache(moduleName: string, projectName: string | undefined, compilerOptions: CompilerOptions, host: ModuleResolutionHost, globalCache: string): ResolvedModuleWithFailedLookupLocations;
-}
-//# sourceMappingURL=parser.d.ts.map
-declare namespace ts {
-    enum ModuleInstanceState {
-        NonInstantiated = 0,
-        Instantiated = 1,
-        ConstEnumOnly = 2
-    }
-    function getModuleInstanceState(node: ModuleDeclaration): ModuleInstanceState;
-    function bindSourceFile(file: SourceFile, options: CompilerOptions): void;
-    function isExportsOrModuleExportsOrAlias(sourceFile: SourceFile, node: Expression): boolean;
-    /**
-     * Computes the transform flags for a node, given the transform flags of its subtree
-     *
-     * @param node The node to analyze
-     * @param subtreeFlags Transform flags computed for this node's subtree
-     */
-    function computeTransformFlagsForNode(node: Node, subtreeFlags: TransformFlags): TransformFlags;
-    /**
-     * Gets the transform flags to exclude when unioning the transform flags of a subtree.
-     *
-     * NOTE: This needs to be kept up-to-date with the exclusions used in `computeTransformFlagsForNode`.
-     *       For performance reasons, `computeTransformFlagsForNode` uses local constant values rather
-     *       than calling this function.
-     */
-    function getTransformFlagsSubtreeExclusions(kind: SyntaxKind): TransformFlags.OuterExpressionExcludes | TransformFlags.PropertyAccessExcludes | TransformFlags.NodeExcludes | TransformFlags.ArrowFunctionExcludes | TransformFlags.FunctionExcludes | TransformFlags.ConstructorExcludes | TransformFlags.ClassExcludes | TransformFlags.ModuleExcludes | TransformFlags.TypeExcludes | TransformFlags.ObjectLiteralExcludes | TransformFlags.ArrayLiteralOrCallOrNewExcludes | TransformFlags.VariableDeclarationListExcludes | TransformFlags.CatchClauseExcludes;
-}
-/** @internal */
-declare namespace ts {
-    function createGetSymbolWalker(getRestTypeOfSignature: (sig: Signature) => Type, getTypePredicateOfSignature: (sig: Signature) => TypePredicate | undefined, getReturnTypeOfSignature: (sig: Signature) => Type, getBaseTypes: (type: Type) => Type[], resolveStructuredTypeMembers: (type: ObjectType) => ResolvedType, getTypeOfSymbol: (sym: Symbol) => Type, getResolvedSymbol: (node: Node) => Symbol, getIndexTypeOfStructuredType: (type: Type, kind: IndexKind) => Type | undefined, getConstraintFromTypeParameter: (typeParameter: TypeParameter) => Type | undefined, getFirstIdentifier: (node: EntityNameOrEntityNameExpression) => Identifier): (accept?: (symbol: Symbol) => boolean) => SymbolWalker;
-}
-declare namespace ts {
-    function getNodeId(node: Node): number;
-    function getSymbolId(symbol: Symbol): number;
-    function isInstantiatedModule(node: ModuleDeclaration, preserveConstEnums: boolean): boolean;
-    function createTypeChecker(host: TypeCheckerHost, produceDiagnostics: boolean): TypeChecker;
 }
 declare namespace ts {
-    function updateNode<T extends Node>(updated: T, original: T): T;
-    function createNodeArray<T extends Node>(elements?: T[], hasTrailingComma?: boolean): MutableNodeArray<T>;
     function createNodeArray<T extends Node>(elements?: ReadonlyArray<T>, hasTrailingComma?: boolean): NodeArray<T>;
-    /**
-     * Creates a shallow, memberwise clone of a node with no source map location.
-     */
-    function getSynthesizedClone<T extends Node>(node: T): T;
-    function createLiteral(value: string | StringLiteral | NoSubstitutionTemplateLiteral | NumericLiteral | Identifier, isSingleQuote: boolean): StringLiteral;
     /** If a node is passed, creates a string literal whose source text is read from a source node during emit. */
     function createLiteral(value: string | StringLiteral | NoSubstitutionTemplateLiteral | NumericLiteral | Identifier): StringLiteral;
     function createLiteral(value: number): NumericLiteral;
@@ -7693,24 +3631,19 @@ declare namespace ts {
     function createStringLiteral(text: string): StringLiteral;
     function createRegularExpressionLiteral(text: string): RegularExpressionLiteral;
     function createIdentifier(text: string): Identifier;
-    function createIdentifier(text: string, typeArguments: ReadonlyArray<TypeNode | TypeParameterDeclaration> | undefined): Identifier;
     function updateIdentifier(node: Identifier): Identifier;
-    function updateIdentifier(node: Identifier, typeArguments: NodeArray<TypeNode | TypeParameterDeclaration> | undefined): Identifier;
     /** Create a unique temporary variable. */
     function createTempVariable(recordTempVariable: ((node: Identifier) => void) | undefined): Identifier;
-    function createTempVariable(recordTempVariable: ((node: Identifier) => void) | undefined, reservedInNestedScopes: boolean): GeneratedIdentifier;
     /** Create a unique temporary variable for use in a loop. */
     function createLoopVariable(): Identifier;
     /** Create a unique name based on the supplied text. */
     function createUniqueName(text: string): Identifier;
-    function createOptimisticUniqueName(text: string): GeneratedIdentifier;
     /** Create a unique name based on the supplied text. */
     function createOptimisticUniqueName(text: string): Identifier;
     /** Create a unique name based on the supplied text. This does not consider names injected by the transformer. */
     function createFileLevelUniqueName(text: string): Identifier;
     /** Create a unique name generated for a node. */
     function getGeneratedNameForNode(node: Node): Identifier;
-    function getGeneratedNameForNode(node: Node, flags: GeneratedIdentifierFlags): Identifier;
     function createToken<TKind extends SyntaxKind>(token: TKind): Token<TKind>;
     function createSuper(): SuperExpression;
     function createThis(): ThisExpression & Token<SyntaxKind.ThisKeyword>;
@@ -7749,7 +3682,6 @@ declare namespace ts {
     function updateConstructSignature(node: ConstructSignatureDeclaration, typeParameters: NodeArray<TypeParameterDeclaration> | undefined, parameters: NodeArray<ParameterDeclaration>, type: TypeNode | undefined): ConstructSignatureDeclaration;
     function createIndexSignature(decorators: ReadonlyArray<Decorator> | undefined, modifiers: ReadonlyArray<Modifier> | undefined, parameters: ReadonlyArray<ParameterDeclaration>, type: TypeNode): IndexSignatureDeclaration;
     function updateIndexSignature(node: IndexSignatureDeclaration, decorators: ReadonlyArray<Decorator> | undefined, modifiers: ReadonlyArray<Modifier> | undefined, parameters: ReadonlyArray<ParameterDeclaration>, type: TypeNode): IndexSignatureDeclaration;
-    function createSignatureDeclaration(kind: SyntaxKind, typeParameters: ReadonlyArray<TypeParameterDeclaration> | undefined, parameters: ReadonlyArray<ParameterDeclaration>, type: TypeNode | undefined, typeArguments?: ReadonlyArray<TypeNode> | undefined): SignatureDeclaration;
     function createKeywordTypeNode(kind: KeywordTypeNode["kind"]): KeywordTypeNode;
     function createTypePredicateNode(parameterName: Identifier | ThisTypeNode | string, type: TypeNode): TypePredicateNode;
     function updateTypePredicateNode(node: TypePredicateNode, parameterName: Identifier | ThisTypeNode, type: TypeNode): TypePredicateNode;
@@ -7769,11 +3701,13 @@ declare namespace ts {
     function updateTupleTypeNode(node: TupleTypeNode, elementTypes: ReadonlyArray<TypeNode>): TupleTypeNode;
     function createOptionalTypeNode(type: TypeNode): OptionalTypeNode;
     function updateOptionalTypeNode(node: OptionalTypeNode, type: TypeNode): OptionalTypeNode;
+    function createRestTypeNode(type: TypeNode): RestTypeNode;
+    function updateRestTypeNode(node: RestTypeNode, type: TypeNode): RestTypeNode;
     function createUnionTypeNode(types: ReadonlyArray<TypeNode>): UnionTypeNode;
     function updateUnionTypeNode(node: UnionTypeNode, types: NodeArray<TypeNode>): UnionTypeNode;
     function createIntersectionTypeNode(types: ReadonlyArray<TypeNode>): IntersectionTypeNode;
     function updateIntersectionTypeNode(node: IntersectionTypeNode, types: NodeArray<TypeNode>): IntersectionTypeNode;
-    function createUnionOrIntersectionTypeNode(kind: SyntaxKind.UnionType | SyntaxKind.IntersectionType, types: ReadonlyArray<TypeNode>): UnionTypeNode | IntersectionTypeNode;
+    function createUnionOrIntersectionTypeNode(kind: SyntaxKind.UnionType | SyntaxKind.IntersectionType, types: ReadonlyArray<TypeNode>): UnionOrIntersectionTypeNode;
     function createConditionalTypeNode(checkType: TypeNode, extendsType: TypeNode, trueType: TypeNode, falseType: TypeNode): ConditionalTypeNode;
     function updateConditionalTypeNode(node: ConditionalTypeNode, checkType: TypeNode, extendsType: TypeNode, trueType: TypeNode, falseType: TypeNode): ConditionalTypeNode;
     function createInferTypeNode(typeParameter: TypeParameterDeclaration): InferTypeNode;
@@ -7812,8 +3746,6 @@ declare namespace ts {
     function updateNew(node: NewExpression, expression: Expression, typeArguments: ReadonlyArray<TypeNode> | undefined, argumentsArray: ReadonlyArray<Expression> | undefined): NewExpression;
     function createTaggedTemplate(tag: Expression, template: TemplateLiteral): TaggedTemplateExpression;
     function createTaggedTemplate(tag: Expression, typeArguments: ReadonlyArray<TypeNode> | undefined, template: TemplateLiteral): TaggedTemplateExpression;
-    /** @internal */
-    function createTaggedTemplate(tag: Expression, typeArgumentsOrTemplate: ReadonlyArray<TypeNode> | TemplateLiteral | undefined, template?: TemplateLiteral): TaggedTemplateExpression;
     function updateTaggedTemplate(node: TaggedTemplateExpression, tag: Expression, template: TemplateLiteral): TaggedTemplateExpression;
     function updateTaggedTemplate(node: TaggedTemplateExpression, tag: Expression, typeArguments: ReadonlyArray<TypeNode> | undefined, template: TemplateLiteral): TaggedTemplateExpression;
     function createTypeAssertion(type: TypeNode, expression: Expression): TypeAssertion;
@@ -7869,7 +3801,6 @@ declare namespace ts {
     function updateTemplateSpan(node: TemplateSpan, expression: Expression, literal: TemplateMiddle | TemplateTail): TemplateSpan;
     function createSemicolonClassElement(): SemicolonClassElement;
     function createBlock(statements: ReadonlyArray<Statement>, multiLine?: boolean): Block;
-    function createExpressionStatement(expression: Expression): ExpressionStatement;
     function updateBlock(node: Block, statements: ReadonlyArray<Statement>): Block;
     function createVariableStatement(modifiers: ReadonlyArray<Modifier> | undefined, declarationList: VariableDeclarationList | ReadonlyArray<VariableDeclaration>): VariableStatement;
     function updateVariableStatement(node: VariableStatement, modifiers: ReadonlyArray<Modifier> | undefined, declarationList: VariableDeclarationList): VariableStatement;
@@ -7995,16 +3926,6 @@ declare namespace ts {
      * @param original The original statement.
      */
     function createNotEmittedStatement(original: Node): NotEmittedStatement;
-    /**
-     * Creates a synthetic element to act as a placeholder for the end of an emitted declaration in
-     * order to properly emit exports.
-     */
-    function createEndOfDeclarationMarker(original: Node): EndOfDeclarationMarker;
-    /**
-     * Creates a synthetic element to act as a placeholder for the beginning of a merged declaration in
-     * order to properly emit exports.
-     */
-    function createMergeDeclarationMarker(original: Node): MergeDeclarationMarker;
     /**
      * Creates a synthetic expression to act as a placeholder for a not-emitted expression in
      * order to preserve comments or sourcemap positions.
@@ -8018,8 +3939,10 @@ declare namespace ts {
     function createCommaList(elements: ReadonlyArray<Expression>): CommaListExpression;
     function updateCommaList(node: CommaListExpression, elements: ReadonlyArray<Expression>): CommaListExpression;
     function createBundle(sourceFiles: ReadonlyArray<SourceFile>, prepends?: ReadonlyArray<UnparsedSource | InputFiles>): Bundle;
-    function createUnparsedSourceFile(text: string, map?: string): UnparsedSource;
-    function createInputFiles(javascript: string, declaration: string, javascriptMapText?: string, declarationMapText?: string): InputFiles;
+    function createUnparsedSourceFile(text: string): UnparsedSource;
+    function createUnparsedSourceFile(text: string, mapPath: string | undefined, map: string | undefined): UnparsedSource;
+    function createInputFiles(javascript: string, declaration: string): InputFiles;
+    function createInputFiles(javascript: string, declaration: string, javascriptMapPath: string | undefined, javascriptMapText: string | undefined, declarationMapPath: string | undefined, declarationMapText: string | undefined): InputFiles;
     function updateBundle(node: Bundle, sourceFiles: ReadonlyArray<SourceFile>, prepends?: ReadonlyArray<UnparsedSource>): Bundle;
     function createImmediatelyInvokedFunctionExpression(statements: ReadonlyArray<Statement>): CallExpression;
     function createImmediatelyInvokedFunctionExpression(statements: ReadonlyArray<Statement>, param: ParameterDeclaration, paramValue: Expression): CallExpression;
@@ -8045,20 +3968,11 @@ declare namespace ts {
      * @param sourceFile A source file.
      */
     function disposeEmitNodes(sourceFile: SourceFile): void;
-    /**
-     * Associates a node with the current transformation, initializing
-     * various transient transformation properties.
-     */
-    function getOrCreateEmitNode(node: Node): EmitNode;
     function setTextRange<T extends TextRange>(range: T, location: TextRange | undefined): T;
     /**
      * Sets flags that control emit behavior of a node.
      */
     function setEmitFlags<T extends Node>(node: T, emitFlags: EmitFlags): T;
-    /**
-     * Sets flags that control emit behavior of a node.
-     */
-    function addEmitFlags<T extends Node>(node: T, emitFlags: EmitFlags): T;
     /**
      * Gets a custom text range to use when emitting source maps.
      */
@@ -8079,14 +3993,6 @@ declare namespace ts {
      * Sets the TextRange to use for source maps for a token of a node.
      */
     function setTokenSourceMapRange<T extends Node>(node: T, token: SyntaxKind, range: SourceMapRange | undefined): T;
-    /**
-     * Gets a custom text range to use when emitting comments.
-     */
-    function getStartsOnNewLine(node: Node): boolean | undefined;
-    /**
-     * Sets a custom text range to use when emitting comments.
-     */
-    function setStartsOnNewLine<T extends Node>(node: T, newLine: boolean): T;
     /**
      * Gets a custom text range to use when emitting comments.
      */
@@ -8130,262 +4036,8 @@ declare namespace ts {
      * Moves matching emit helpers from a source node to a target node.
      */
     function moveEmitHelpers(source: Node, target: Node, predicate: (helper: EmitHelper) => boolean): void;
-    function compareEmitHelpers(x: EmitHelper, y: EmitHelper): Comparison;
     function setOriginalNode<T extends Node>(node: T, original: Node | undefined): T;
 }
-declare namespace ts {
-    const nullTransformationContext: TransformationContext;
-    type TypeOfTag = "undefined" | "number" | "boolean" | "string" | "symbol" | "object" | "function";
-    function createTypeCheck(value: Expression, tag: TypeOfTag): BinaryExpression;
-    function createMemberAccessForPropertyName(target: Expression, memberName: PropertyName, location?: TextRange): MemberExpression;
-    function createFunctionCall(func: Expression, thisArg: Expression, argumentsList: ReadonlyArray<Expression>, location?: TextRange): CallExpression;
-    function createFunctionApply(func: Expression, thisArg: Expression, argumentsExpression: Expression, location?: TextRange): CallExpression;
-    function createArraySlice(array: Expression, start?: number | Expression): CallExpression;
-    function createArrayConcat(array: Expression, values: ReadonlyArray<Expression>): CallExpression;
-    function createMathPow(left: Expression, right: Expression, location?: TextRange): CallExpression;
-    function createExpressionForJsxElement(jsxFactoryEntity: EntityName | undefined, reactNamespace: string, tagName: Expression, props: Expression, children: ReadonlyArray<Expression>, parentElement: JsxOpeningLikeElement, location: TextRange): LeftHandSideExpression;
-    function createExpressionForJsxFragment(jsxFactoryEntity: EntityName | undefined, reactNamespace: string, children: ReadonlyArray<Expression>, parentElement: JsxOpeningFragment, location: TextRange): LeftHandSideExpression;
-    function getHelperName(name: string): Identifier;
-    function createValuesHelper(context: TransformationContext, expression: Expression, location?: TextRange): CallExpression;
-    function createReadHelper(context: TransformationContext, iteratorRecord: Expression, count: number | undefined, location?: TextRange): CallExpression;
-    function createSpreadHelper(context: TransformationContext, argumentList: ReadonlyArray<Expression>, location?: TextRange): CallExpression;
-    function createForOfBindingStatement(node: ForInitializer, boundValue: Expression): Statement;
-    function insertLeadingStatement(dest: Statement, source: Statement): Block;
-    function restoreEnclosingLabel(node: Statement, outermostLabeledStatement: LabeledStatement | undefined, afterRestoreLabelCallback?: (node: LabeledStatement) => void): Statement;
-    interface CallBinding {
-        target: LeftHandSideExpression;
-        thisArg: Expression;
-    }
-    function createCallBinding(expression: Expression, recordTempVariable: (temp: Identifier) => void, languageVersion?: ScriptTarget, cacheIdentifiers?: boolean): CallBinding;
-    function inlineExpressions(expressions: ReadonlyArray<Expression>): Expression;
-    function createExpressionFromEntityName(node: EntityName | Expression): Expression;
-    function createExpressionForPropertyName(memberName: PropertyName): Expression;
-    function createExpressionForObjectLiteralElementLike(node: ObjectLiteralExpression, property: ObjectLiteralElementLike, receiver: Expression): Expression | undefined;
-    /**
-     * Gets the internal name of a declaration. This is primarily used for declarations that can be
-     * referred to by name in the body of an ES5 class function body. An internal name will *never*
-     * be prefixed with an module or namespace export modifier like "exports." when emitted as an
-     * expression. An internal name will also *never* be renamed due to a collision with a block
-     * scoped variable.
-     *
-     * @param node The declaration.
-     * @param allowComments A value indicating whether comments may be emitted for the name.
-     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
-     */
-    function getInternalName(node: Declaration, allowComments?: boolean, allowSourceMaps?: boolean): Identifier;
-    /**
-     * Gets whether an identifier should only be referred to by its internal name.
-     */
-    function isInternalName(node: Identifier): boolean;
-    /**
-     * Gets the local name of a declaration. This is primarily used for declarations that can be
-     * referred to by name in the declaration's immediate scope (classes, enums, namespaces). A
-     * local name will *never* be prefixed with an module or namespace export modifier like
-     * "exports." when emitted as an expression.
-     *
-     * @param node The declaration.
-     * @param allowComments A value indicating whether comments may be emitted for the name.
-     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
-     */
-    function getLocalName(node: Declaration, allowComments?: boolean, allowSourceMaps?: boolean): Identifier;
-    /**
-     * Gets whether an identifier should only be referred to by its local name.
-     */
-    function isLocalName(node: Identifier): boolean;
-    /**
-     * Gets the export name of a declaration. This is primarily used for declarations that can be
-     * referred to by name in the declaration's immediate scope (classes, enums, namespaces). An
-     * export name will *always* be prefixed with an module or namespace export modifier like
-     * `"exports."` when emitted as an expression if the name points to an exported symbol.
-     *
-     * @param node The declaration.
-     * @param allowComments A value indicating whether comments may be emitted for the name.
-     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
-     */
-    function getExportName(node: Declaration, allowComments?: boolean, allowSourceMaps?: boolean): Identifier;
-    /**
-     * Gets whether an identifier should only be referred to by its export representation if the
-     * name points to an exported symbol.
-     */
-    function isExportName(node: Identifier): boolean;
-    /**
-     * Gets the name of a declaration for use in declarations.
-     *
-     * @param node The declaration.
-     * @param allowComments A value indicating whether comments may be emitted for the name.
-     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
-     */
-    function getDeclarationName(node: Declaration, allowComments?: boolean, allowSourceMaps?: boolean): Identifier;
-    /**
-     * Gets the exported name of a declaration for use in expressions.
-     *
-     * An exported name will *always* be prefixed with an module or namespace export modifier like
-     * "exports." if the name points to an exported symbol.
-     *
-     * @param ns The namespace identifier.
-     * @param node The declaration.
-     * @param allowComments A value indicating whether comments may be emitted for the name.
-     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
-     */
-    function getExternalModuleOrNamespaceExportName(ns: Identifier | undefined, node: Declaration, allowComments?: boolean, allowSourceMaps?: boolean): Identifier | PropertyAccessExpression;
-    /**
-     * Gets a namespace-qualified name for use in expressions.
-     *
-     * @param ns The namespace identifier.
-     * @param name The name.
-     * @param allowComments A value indicating whether comments may be emitted for the name.
-     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
-     */
-    function getNamespaceMemberName(ns: Identifier, name: Identifier, allowComments?: boolean, allowSourceMaps?: boolean): PropertyAccessExpression;
-    function convertToFunctionBody(node: ConciseBody, multiLine?: boolean): Block;
-    function convertFunctionDeclarationToExpression(node: FunctionDeclaration): FunctionExpression;
-    /**
-     * Add any necessary prologue-directives into target statement-array.
-     * The function needs to be called during each transformation step.
-     * This function needs to be called whenever we transform the statement
-     * list of a source file, namespace, or function-like body.
-     *
-     * @param target: result statements array
-     * @param source: origin statements array
-     * @param ensureUseStrict: boolean determining whether the function need to add prologue-directives
-     * @param visitor: Optional callback used to visit any custom prologue directives.
-     */
-    function addPrologue(target: Statement[], source: ReadonlyArray<Statement>, ensureUseStrict?: boolean, visitor?: (node: Node) => VisitResult<Node>): number;
-    /**
-     * Add just the standard (string-expression) prologue-directives into target statement-array.
-     * The function needs to be called during each transformation step.
-     * This function needs to be called whenever we transform the statement
-     * list of a source file, namespace, or function-like body.
-     */
-    function addStandardPrologue(target: Statement[], source: ReadonlyArray<Statement>, ensureUseStrict?: boolean): number;
-    /**
-     * Add just the custom prologue-directives into target statement-array.
-     * The function needs to be called during each transformation step.
-     * This function needs to be called whenever we transform the statement
-     * list of a source file, namespace, or function-like body.
-     */
-    function addCustomPrologue(target: Statement[], source: ReadonlyArray<Statement>, statementOffset: number, visitor?: (node: Node) => VisitResult<Node>): number;
-    function addCustomPrologue(target: Statement[], source: ReadonlyArray<Statement>, statementOffset: number | undefined, visitor?: (node: Node) => VisitResult<Node>): number | undefined;
-    function startsWithUseStrict(statements: ReadonlyArray<Statement>): boolean;
-    /**
-     * Ensures "use strict" directive is added
-     *
-     * @param statements An array of statements
-     */
-    function ensureUseStrict(statements: NodeArray<Statement>): NodeArray<Statement>;
-    /**
-     * Wraps the operand to a BinaryExpression in parentheses if they are needed to preserve the intended
-     * order of operations.
-     *
-     * @param binaryOperator The operator for the BinaryExpression.
-     * @param operand The operand for the BinaryExpression.
-     * @param isLeftSideOfBinary A value indicating whether the operand is the left side of the
-     *                           BinaryExpression.
-     */
-    function parenthesizeBinaryOperand(binaryOperator: SyntaxKind, operand: Expression, isLeftSideOfBinary: boolean, leftOperand?: Expression): Expression;
-    function parenthesizeForConditionalHead(condition: Expression): Expression;
-    function parenthesizeSubexpressionOfConditionalExpression(e: Expression): Expression;
-    /**
-     *  [Per the spec](https://tc39.github.io/ecma262/#prod-ExportDeclaration), `export default` accepts _AssigmentExpression_ but
-     *  has a lookahead restriction for `function`, `async function`, and `class`.
-     *
-     * Basically, that means we need to parenthesize in the following cases:
-     *
-     * - BinaryExpression of CommaToken
-     * - CommaList (synthetic list of multiple comma expressions)
-     * - FunctionExpression
-     * - ClassExpression
-     */
-    function parenthesizeDefaultExpression(e: Expression): Expression;
-    /**
-     * Wraps an expression in parentheses if it is needed in order to use the expression
-     * as the expression of a NewExpression node.
-     *
-     * @param expression The Expression node.
-     */
-    function parenthesizeForNew(expression: Expression): LeftHandSideExpression;
-    /**
-     * Wraps an expression in parentheses if it is needed in order to use the expression for
-     * property or element access.
-     *
-     * @param expr The expression node.
-     */
-    function parenthesizeForAccess(expression: Expression): LeftHandSideExpression;
-    function parenthesizePostfixOperand(operand: Expression): LeftHandSideExpression;
-    function parenthesizePrefixOperand(operand: Expression): UnaryExpression;
-    function parenthesizeListElements(elements: NodeArray<Expression>): NodeArray<Expression>;
-    function parenthesizeExpressionForList(expression: Expression): Expression;
-    function parenthesizeExpressionForExpressionStatement(expression: Expression): Expression;
-    function parenthesizeConditionalTypeMember(member: TypeNode): TypeNode;
-    function parenthesizeElementTypeMember(member: TypeNode): TypeNode;
-    function parenthesizeArrayTypeMember(member: TypeNode): TypeNode;
-    function parenthesizeElementTypeMembers(members: ReadonlyArray<TypeNode>): NodeArray<TypeNode>;
-    function parenthesizeTypeParameters(typeParameters: ReadonlyArray<TypeNode> | undefined): MutableNodeArray<TypeNode> | undefined;
-    function parenthesizeConciseBody(body: ConciseBody): ConciseBody;
-    enum OuterExpressionKinds {
-        Parentheses = 1,
-        Assertions = 2,
-        PartiallyEmittedExpressions = 4,
-        All = 7
-    }
-    type OuterExpression = ParenthesizedExpression | TypeAssertion | AsExpression | NonNullExpression | PartiallyEmittedExpression;
-    function isOuterExpression(node: Node, kinds?: OuterExpressionKinds): node is OuterExpression;
-    function skipOuterExpressions(node: Expression, kinds?: OuterExpressionKinds): Expression;
-    function skipOuterExpressions(node: Node, kinds?: OuterExpressionKinds): Node;
-    function skipAssertions(node: Expression): Expression;
-    function skipAssertions(node: Node): Node;
-    function recreateOuterExpressions(outerExpression: Expression | undefined, innerExpression: Expression, kinds?: OuterExpressionKinds): Expression;
-    function startOnNewLine<T extends Node>(node: T): T;
-    function getExternalHelpersModuleName(node: SourceFile): Identifier | undefined;
-    function getOrCreateExternalHelpersModuleNameIfNeeded(node: SourceFile, compilerOptions: CompilerOptions, hasExportStarsToExportValues?: boolean, hasImportStarOrImportDefault?: boolean): Identifier | undefined;
-    /**
-     * Get the name of that target module from an import or export declaration
-     */
-    function getLocalNameForExternalImport(node: ImportDeclaration | ExportDeclaration | ImportEqualsDeclaration, sourceFile: SourceFile): Identifier | undefined;
-    /**
-     * Get the name of a target module from an import/export declaration as should be written in the emitted output.
-     * The emitted output name can be different from the input if:
-     *  1. The module has a /// <amd-module name="<new name>" />
-     *  2. --out or --outFile is used, making the name relative to the rootDir
-     *  3- The containing SourceFile has an entry in renamedDependencies for the import as requested by some module loaders (e.g. System).
-     * Otherwise, a new StringLiteral node representing the module name will be returned.
-     */
-    function getExternalModuleNameLiteral(importNode: ImportDeclaration | ExportDeclaration | ImportEqualsDeclaration, sourceFile: SourceFile, host: EmitHost, resolver: EmitResolver, compilerOptions: CompilerOptions): StringLiteral | undefined;
-    /**
-     * Get the name of a module as should be written in the emitted output.
-     * The emitted output name can be different from the input if:
-     *  1. The module has a /// <amd-module name="<new name>" />
-     *  2. --out or --outFile is used, making the name relative to the rootDir
-     * Otherwise, a new StringLiteral node representing the module name will be returned.
-     */
-    function tryGetModuleNameFromFile(file: SourceFile | undefined, host: EmitHost, options: CompilerOptions): StringLiteral | undefined;
-    /**
-     * Gets the initializer of an BindingOrAssignmentElement.
-     */
-    function getInitializerOfBindingOrAssignmentElement(bindingElement: BindingOrAssignmentElement): Expression | undefined;
-    /**
-     * Gets the name of an BindingOrAssignmentElement.
-     */
-    function getTargetOfBindingOrAssignmentElement(bindingElement: BindingOrAssignmentElement): BindingOrAssignmentElementTarget | undefined;
-    /**
-     * Determines whether an BindingOrAssignmentElement is a rest element.
-     */
-    function getRestIndicatorOfBindingOrAssignmentElement(bindingElement: BindingOrAssignmentElement): BindingOrAssignmentElementRestIndicator | undefined;
-    /**
-     * Gets the property name of a BindingOrAssignmentElement
-     */
-    function getPropertyNameOfBindingOrAssignmentElement(bindingElement: BindingOrAssignmentElement): Identifier | StringLiteral | NumericLiteral | ComputedPropertyName | undefined;
-    /**
-     * Gets the elements of a BindingOrAssignmentPattern
-     */
-    function getElementsOfBindingOrAssignmentPattern(name: BindingOrAssignmentPattern): ReadonlyArray<BindingOrAssignmentElement>;
-    function convertToArrayAssignmentElement(element: BindingOrAssignmentElement): Expression;
-    function convertToObjectAssignmentElement(element: BindingOrAssignmentElement): ObjectLiteralElementLike;
-    function convertToAssignmentPattern(node: BindingOrAssignmentPattern): AssignmentPattern;
-    function convertToObjectAssignmentPattern(node: ObjectBindingOrAssignmentPattern): ObjectLiteralExpression;
-    function convertToArrayAssignmentPattern(node: ArrayBindingOrAssignmentPattern): ArrayLiteralExpression;
-    function convertToAssignmentElementTarget(node: BindingOrAssignmentElementTarget): Expression;
-}
 declare namespace ts {
     /**
      * Visits a Node using the supplied visitor, possibly returning a new Node in its place.
@@ -8468,585 +4120,97 @@ declare namespace ts {
     function visitEachChild<T extends Node>(node: T | undefined, visitor: Visitor, context: TransformationContext, nodesVisitor?: typeof visitNodes, tokenVisitor?: Visitor): T | undefined;
 }
 declare namespace ts {
-    /**
-     * Similar to `reduceLeft`, performs a reduction against each child of a node.
-     * NOTE: Unlike `forEachChild`, this does *not* visit every node.
-     *
-     * @param node The node containing the children to reduce.
-     * @param initial The initial value to supply to the reduction.
-     * @param f The callback function
-     */
-    function reduceEachChild<T>(node: Node | undefined, initial: T, cbNode: (memo: T, node: Node) => T, cbNodeArray?: (memo: T, nodes: NodeArray<Node>) => T): T;
-    /**
-     * Merges generated lexical declarations into a new statement list.
-     */
-    function mergeLexicalEnvironment(statements: NodeArray<Statement>, declarations: ReadonlyArray<Statement> | undefined): NodeArray<Statement>;
-    /**
-     * Appends generated lexical declarations to an array of statements.
-     */
-    function mergeLexicalEnvironment(statements: Statement[], declarations: ReadonlyArray<Statement> | undefined): Statement[];
-    /**
-     * Lifts a NodeArray containing only Statement nodes to a block.
-     *
-     * @param nodes The NodeArray.
-     */
-    function liftToBlock(nodes: ReadonlyArray<Node>): Statement;
-    /**
-     * Aggregates the TransformFlags for a Node and its subtree.
-     */
-    function aggregateTransformFlags<T extends Node>(node: T): T;
-    namespace Debug {
-        function failBadSyntaxKind(node: Node, message?: string): never;
-        const assertEachNode: (nodes: Node[], test: (node: Node) => boolean, message?: string | undefined) => void;
-        const assertNode: (node: Node | undefined, test: ((node: Node | undefined) => boolean) | undefined, message?: string | undefined) => void;
-        const assertOptionalNode: (node: Node, test: (node: Node) => boolean, message?: string | undefined) => void;
-        const assertOptionalToken: (node: Node, kind: SyntaxKind, message?: string | undefined) => void;
-        const assertMissingNode: typeof noop;
-        /**
-         * Injects debug information into frequently used types.
-         */
-        function enableDebugInfo(): void;
-    }
-}
-declare namespace ts {
-    function getOriginalNodeId(node: Node): number;
-    interface ExternalModuleInfo {
-        externalImports: (ImportDeclaration | ImportEqualsDeclaration | ExportDeclaration)[];
-        externalHelpersImportDeclaration: ImportDeclaration | undefined;
-        exportSpecifiers: Map<ExportSpecifier[]>;
-        exportedBindings: Identifier[][];
-        exportedNames: Identifier[] | undefined;
-        exportEquals: ExportAssignment | undefined;
-        hasExportStarsToExportValues: boolean;
-    }
-    function chainBundle(transformSourceFile: (x: SourceFile) => SourceFile): (x: SourceFile | Bundle) => SourceFile | Bundle;
-    function getImportNeedsImportStarHelper(node: ImportDeclaration): boolean;
-    function getImportNeedsImportDefaultHelper(node: ImportDeclaration): boolean;
-    function collectExternalModuleInfo(sourceFile: SourceFile, resolver: EmitResolver, compilerOptions: CompilerOptions): ExternalModuleInfo;
-    /**
-     * Used in the module transformer to check if an expression is reasonably without sideeffect,
-     *  and thus better to copy into multiple places rather than to cache in a temporary variable
-     *  - this is mostly subjective beyond the requirement that the expression not be sideeffecting
-     */
-    function isSimpleCopiableExpression(expression: Expression): boolean;
-    /**
-     * @param input Template string input strings
-     * @param args Names which need to be made file-level unique
-     */
-    function helperString(input: TemplateStringsArray, ...args: string[]): (uniqueName: EmitHelperUniqueNameCallback) => string;
+    function createPrinter(printerOptions?: PrinterOptions, handlers?: PrintHandlers): Printer;
 }
 declare namespace ts {
-    enum FlattenLevel {
-        All = 0,
-        ObjectRest = 1
+    function findConfigFile(searchPath: string, fileExists: (fileName: string) => boolean, configName?: string): string | undefined;
+    function resolveTripleslashReference(moduleName: string, containingFile: string): string;
+    function createCompilerHost(options: CompilerOptions, setParentNodes?: boolean): CompilerHost;
+    function getPreEmitDiagnostics(program: Program, sourceFile?: SourceFile, cancellationToken?: CancellationToken): Diagnostic[];
+    interface FormatDiagnosticsHost {
+        getCurrentDirectory(): string;
+        getCanonicalFileName(fileName: string): string;
+        getNewLine(): string;
     }
+    function formatDiagnostics(diagnostics: ReadonlyArray<Diagnostic>, host: FormatDiagnosticsHost): string;
+    function formatDiagnostic(diagnostic: Diagnostic, host: FormatDiagnosticsHost): string;
+    function formatDiagnosticsWithColorAndContext(diagnostics: ReadonlyArray<Diagnostic>, host: FormatDiagnosticsHost): string;
+    function flattenDiagnosticMessageText(messageText: string | DiagnosticMessageChain | undefined, newLine: string): string;
+    function getConfigFileParsingDiagnostics(configFileParseResult: ParsedCommandLine): ReadonlyArray<Diagnostic>;
     /**
-     * Flattens a DestructuringAssignment or a VariableDeclaration to an expression.
+     * Create a new 'Program' instance. A Program is an immutable collection of 'SourceFile's and a 'CompilerOptions'
+     * that represent a compilation unit.
      *
-     * @param node The node to flatten.
-     * @param visitor An optional visitor used to visit initializers.
-     * @param context The transformation context.
-     * @param level Indicates the extent to which flattening should occur.
-     * @param needsValue An optional value indicating whether the value from the right-hand-side of
-     * the destructuring assignment is needed as part of a larger expression.
-     * @param createAssignmentCallback An optional callback used to create the assignment expression.
-     */
-    function flattenDestructuringAssignment(node: VariableDeclaration | DestructuringAssignment, visitor: ((node: Node) => VisitResult<Node>) | undefined, context: TransformationContext, level: FlattenLevel, needsValue?: boolean, createAssignmentCallback?: (name: Identifier, value: Expression, location?: TextRange) => Expression): Expression;
-    /**
-     * Flattens a VariableDeclaration or ParameterDeclaration to one or more variable declarations.
+     * Creating a program proceeds from a set of root files, expanding the set of inputs by following imports and
+     * triple-slash-reference-path directives transitively. '@types' and triple-slash-reference-types are also pulled in.
      *
-     * @param node The node to flatten.
-     * @param visitor An optional visitor used to visit initializers.
-     * @param context The transformation context.
-     * @param boundValue The value bound to the declaration.
-     * @param skipInitializer A value indicating whether to ignore the initializer of `node`.
-     * @param hoistTempVariables Indicates whether temporary variables should not be recorded in-line.
-     * @param level Indicates the extent to which flattening should occur.
+     * @param createProgramOptions - The options for creating a program.
+     * @returns A 'Program' object.
      */
-    function flattenDestructuringBinding(node: VariableDeclaration | ParameterDeclaration, visitor: (node: Node) => VisitResult<Node>, context: TransformationContext, level: FlattenLevel, rval?: Expression, hoistTempVariables?: boolean, skipInitializer?: boolean): VariableDeclaration[];
-}
-declare namespace ts {
-    function transformTypeScript(context: TransformationContext): (node: SourceFile | Bundle) => SourceFile | Bundle;
-}
-declare namespace ts {
-    function transformES2017(context: TransformationContext): (x: SourceFile | Bundle) => SourceFile | Bundle;
-    const asyncSuperHelper: EmitHelper;
-    const advancedAsyncSuperHelper: EmitHelper;
-}
-declare namespace ts {
-    function transformESNext(context: TransformationContext): (x: SourceFile | Bundle) => SourceFile | Bundle;
-    function createAssignHelper(context: TransformationContext, attributesSegments: Expression[]): CallExpression;
-}
-declare namespace ts {
-    function transformJsx(context: TransformationContext): (x: SourceFile | Bundle) => SourceFile | Bundle;
-}
-declare namespace ts {
-    function transformES2016(context: TransformationContext): (x: SourceFile | Bundle) => SourceFile | Bundle;
-}
-declare namespace ts {
-    function transformES2015(context: TransformationContext): (x: SourceFile | Bundle) => SourceFile | Bundle;
-}
-declare namespace ts {
+    function createProgram(createProgramOptions: CreateProgramOptions): Program;
     /**
-     * Transforms ES5 syntax into ES3 syntax.
+     * Create a new 'Program' instance. A Program is an immutable collection of 'SourceFile's and a 'CompilerOptions'
+     * that represent a compilation unit.
      *
-     * @param context Context and state information for the transformation.
+     * Creating a program proceeds from a set of root files, expanding the set of inputs by following imports and
+     * triple-slash-reference-path directives transitively. '@types' and triple-slash-reference-types are also pulled in.
+     *
+     * @param rootNames - A set of root files.
+     * @param options - The compiler options which should be used.
+     * @param host - The host interacts with the underlying file system.
+     * @param oldProgram - Reuses an old program structure.
+     * @param configFileParsingDiagnostics - error during config file parsing
+     * @returns A 'Program' object.
      */
-    function transformES5(context: TransformationContext): (x: SourceFile | Bundle) => SourceFile | Bundle;
-}
-declare namespace ts {
-    function transformGenerators(context: TransformationContext): (x: SourceFile | Bundle) => SourceFile | Bundle;
-}
-declare namespace ts {
-    function transformModule(context: TransformationContext): (x: SourceFile | Bundle) => SourceFile | Bundle;
-}
-declare namespace ts {
-    function transformSystemModule(context: TransformationContext): (x: SourceFile | Bundle) => SourceFile | Bundle;
-}
-declare namespace ts {
-    function transformES2015Module(context: TransformationContext): (x: SourceFile | Bundle) => SourceFile | Bundle;
-}
-declare namespace ts {
-    type GetSymbolAccessibilityDiagnostic = (symbolAccessibilityResult: SymbolAccessibilityResult) => (SymbolAccessibilityDiagnostic | undefined);
-    interface SymbolAccessibilityDiagnostic {
-        errorNode: Node;
-        diagnosticMessage: DiagnosticMessage;
-        typeName?: DeclarationName | QualifiedName;
-    }
-    type DeclarationDiagnosticProducing = VariableDeclaration | PropertyDeclaration | PropertySignature | BindingElement | SetAccessorDeclaration | GetAccessorDeclaration | ConstructSignatureDeclaration | CallSignatureDeclaration | MethodDeclaration | MethodSignature | FunctionDeclaration | ParameterDeclaration | TypeParameterDeclaration | ExpressionWithTypeArguments | ImportEqualsDeclaration | TypeAliasDeclaration | ConstructorDeclaration | IndexSignatureDeclaration;
-    function canProduceDiagnostics(node: Node): node is DeclarationDiagnosticProducing;
-    function createGetSymbolAccessibilityDiagnosticForNodeName(node: DeclarationDiagnosticProducing): (symbolAccessibilityResult: SymbolAccessibilityResult) => SymbolAccessibilityDiagnostic | undefined;
-    function createGetSymbolAccessibilityDiagnosticForNode(node: DeclarationDiagnosticProducing): (symbolAccessibilityResult: SymbolAccessibilityResult) => SymbolAccessibilityDiagnostic | undefined;
-}
-declare namespace ts {
-    function getDeclarationDiagnostics(host: EmitHost, resolver: EmitResolver, file: SourceFile | undefined): DiagnosticWithLocation[] | undefined;
+    function createProgram(rootNames: ReadonlyArray<string>, options: CompilerOptions, host?: CompilerHost, oldProgram?: Program, configFileParsingDiagnostics?: ReadonlyArray<Diagnostic>): Program;
     /**
-     * Transforms a ts file into a .d.ts file
-     * This process requires type information, which is retrieved through the emit resolver. Because of this,
-     * in many places this transformer assumes it will be operating on parse tree nodes directly.
-     * This means that _no transforms should be allowed to occur before this one_.
+     * Returns the target config filename of a project reference
      */
-    function transformDeclarations(context: TransformationContext): {
-        (node: Bundle): Bundle;
-        (node: SourceFile): SourceFile;
-        (node: SourceFile | Bundle): SourceFile | Bundle;
-    };
+    function resolveProjectReferencePath(host: CompilerHost, ref: ProjectReference): string | undefined;
 }
 declare namespace ts {
-    function getTransformers(compilerOptions: CompilerOptions, customTransformers?: CustomTransformers): TransformerFactory<SourceFile | Bundle>[];
-    /**
-     * Transforms an array of SourceFiles by passing them through each transformer.
-     *
-     * @param resolver The emit resolver provided by the checker.
-     * @param host The emit host object used to interact with the file system.
-     * @param options Compiler options to surface in the `TransformationContext`.
-     * @param nodes An array of nodes to transform.
-     * @param transforms An array of `TransformerFactory` callbacks.
-     * @param allowDtsFiles A value indicating whether to allow the transformation of .d.ts files.
-     */
-    function transformNodes<T extends Node>(resolver: EmitResolver | undefined, host: EmitHost | undefined, options: CompilerOptions, nodes: ReadonlyArray<T>, transformers: ReadonlyArray<TransformerFactory<T>>, allowDtsFiles: boolean): TransformationResult<T>;
+    interface EmitOutput {
+        outputFiles: OutputFile[];
+        emitSkipped: boolean;
+    }
+    interface OutputFile {
+        name: string;
+        writeByteOrderMark: boolean;
+        text: string;
+    }
 }
 declare namespace ts {
-    interface SourceMapWriter {
+    type AffectedFileResult<T> = {
+        result: T;
+        affected: SourceFile | Program;
+    } | undefined;
+    interface BuilderProgramHost {
         /**
-         * Initialize the SourceMapWriter for a new output file.
-         *
-         * @param filePath The path to the generated output file.
-         * @param sourceMapFilePath The path to the output source map file.
-         * @param sourceFileOrBundle The input source file or bundle for the program.
+         * return true if file names are treated with case sensitivity
          */
-        initialize(filePath: string, sourceMapFilePath: string | undefined, sourceFileOrBundle: SourceFile | Bundle, sourceMapOutput?: SourceMapData[]): void;
+        useCaseSensitiveFileNames(): boolean;
         /**
-         * Reset the SourceMapWriter to an empty state.
+         * If provided this would be used this hash instead of actual file shape text for detecting changes
          */
-        reset(): void;
+        createHash?: (data: string) => string;
         /**
-         * Set the current source file.
-         *
-         * @param sourceFile The source file.
+         * When emit or emitNextAffectedFile are called without writeFile,
+         * this callback if present would be used to write files
          */
-        setSourceFile(sourceFile: SourceMapSource): void;
+        writeFile?: WriteFileCallback;
+    }
+    /**
+     * Builder to manage the program state changes
+     */
+    interface BuilderProgram {
         /**
-         * Emits a mapping.
-         *
-         * If the position is synthetic (undefined or a negative value), no mapping will be
-         * created.
-         *
-         * @param pos The position.
+         * Returns current program
          */
-        emitPos(pos: number): void;
+        getProgram(): Program;
         /**
-         * Emits a node with possible leading and trailing source maps.
-         *
-         * @param hint The current emit context
-         * @param node The node to emit.
-         * @param emitCallback The callback used to emit the node.
+         * Get compiler options of the program
          */
-        emitNodeWithSourceMap(hint: EmitHint, node: Node, emitCallback: (hint: EmitHint, node: Node) => void): void;
-        /**
-         * Emits a token of a node node with possible leading and trailing source maps.
-         *
-         * @param node The node containing the token.
-         * @param token The token to emit.
-         * @param tokenStartPos The start pos of the token.
-         * @param emitCallback The callback used to emit the token.
-         */
-        emitTokenWithSourceMap(node: Node, token: SyntaxKind, writer: (s: string) => void, tokenStartPos: number, emitCallback: (token: SyntaxKind, writer: (s: string) => void, tokenStartPos: number) => number): number;
-        /**
-         * Gets the text for the source map.
-         */
-        getText(): string;
-        /**
-         * Gets the SourceMappingURL for the source map.
-         */
-        getSourceMappingURL(): string;
-    }
-    interface SourceMapOptions {
-        sourceMap?: boolean;
-        inlineSourceMap?: boolean;
-        inlineSources?: boolean;
-        sourceRoot?: string;
-        mapRoot?: string;
-        extendedDiagnostics?: boolean;
-    }
-    function createSourceMapWriter(host: EmitHost, writer: EmitTextWriter, compilerOptions?: SourceMapOptions): SourceMapWriter;
-}
-declare namespace ts {
-    interface CommentWriter {
-        reset(): void;
-        setSourceFile(sourceFile: SourceFile): void;
-        setWriter(writer: EmitTextWriter | undefined): void;
-        emitNodeWithComments(hint: EmitHint, node: Node | undefined, emitCallback: (hint: EmitHint, node: Node) => void): void;
-        emitBodyWithDetachedComments(node: Node, detachedRange: TextRange, emitCallback: (node: Node) => void): void;
-        emitTrailingCommentsOfPosition(pos: number, prefixSpace?: boolean): void;
-        emitLeadingCommentsOfPosition(pos: number): void;
-    }
-    function createCommentWriter(printerOptions: PrinterOptions, emitPos: ((pos: number) => void) | undefined): CommentWriter;
-}
-declare namespace ts {
-    /**
-     * Iterates over the source files that are expected to have an emit output.
-     *
-     * @param host An EmitHost.
-     * @param action The action to execute.
-     * @param sourceFilesOrTargetSourceFile
-     *   If an array, the full list of source files to emit.
-     *   Else, calls `getSourceFilesToEmit` with the (optional) target source file to determine the list of source files to emit.
-     */
-    function forEachEmittedFile<T>(host: EmitHost, action: (emitFileNames: EmitFileNames, sourceFileOrBundle: SourceFile | Bundle) => T, sourceFilesOrTargetSourceFile?: ReadonlyArray<SourceFile> | SourceFile, emitOnlyDtsFiles?: boolean): T | undefined;
-    function getOutputPathsFor(sourceFile: SourceFile | Bundle, host: EmitHost, forceDtsPaths: boolean): EmitFileNames;
-    function getOutputExtension(sourceFile: SourceFile, options: CompilerOptions): Extension;
-    function emitFiles(resolver: EmitResolver, host: EmitHost, targetSourceFile: SourceFile, emitOnlyDtsFiles?: boolean, transformers?: TransformerFactory<Bundle | SourceFile>[], declarationTransformers?: TransformerFactory<Bundle | SourceFile>[]): EmitResult;
-    function createPrinter(printerOptions?: PrinterOptions, handlers?: PrintHandlers): Printer;
-}
-declare namespace ts {
-    /**
-     * Partial interface of the System thats needed to support the caching of directory structure
-     */
-    interface DirectoryStructureHost {
-        fileExists(path: string): boolean;
-        readFile(path: string, encoding?: string): string | undefined;
-        directoryExists?(path: string): boolean;
-        getDirectories?(path: string): string[];
-        readDirectory?(path: string, extensions?: ReadonlyArray<string>, exclude?: ReadonlyArray<string>, include?: ReadonlyArray<string>, depth?: number): string[];
-        createDirectory?(path: string): void;
-        writeFile?(path: string, data: string, writeByteOrderMark?: boolean): void;
-    }
-    interface FileAndDirectoryExistence {
-        fileExists: boolean;
-        directoryExists: boolean;
-    }
-    interface CachedDirectoryStructureHost extends DirectoryStructureHost {
-        useCaseSensitiveFileNames: boolean;
-        getDirectories(path: string): string[];
-        readDirectory(path: string, extensions?: ReadonlyArray<string>, exclude?: ReadonlyArray<string>, include?: ReadonlyArray<string>, depth?: number): string[];
-        /** Returns the queried result for the file exists and directory exists if at all it was done */
-        addOrDeleteFileOrDirectory(fileOrDirectory: string, fileOrDirectoryPath: Path): FileAndDirectoryExistence | undefined;
-        addOrDeleteFile(fileName: string, filePath: Path, eventKind: FileWatcherEventKind): void;
-        clearCache(): void;
-    }
-    function createCachedDirectoryStructureHost(host: DirectoryStructureHost, currentDirectory: string, useCaseSensitiveFileNames: boolean): CachedDirectoryStructureHost | undefined;
-    enum ConfigFileProgramReloadLevel {
-        None = 0,
-        /** Update the file name list from the disk */
-        Partial = 1,
-        /** Reload completely by re-reading contents of config file from disk and updating program */
-        Full = 2
-    }
-    /**
-     * Updates the existing missing file watches with the new set of missing files after new program is created
-     */
-    function updateMissingFilePathsWatch(program: Program, missingFileWatches: Map<FileWatcher>, createMissingFileWatch: (missingFilePath: Path) => FileWatcher): void;
-    interface WildcardDirectoryWatcher {
-        watcher: FileWatcher;
-        flags: WatchDirectoryFlags;
-    }
-    /**
-     * Updates the existing wild card directory watches with the new set of wild card directories from the config file
-     * after new program is created because the config file was reloaded or program was created first time from the config file
-     * Note that there is no need to call this function when the program is updated with additional files without reloading config files,
-     * as wildcard directories wont change unless reloading config file
-     */
-    function updateWatchingWildcardDirectories(existingWatchedForWildcards: Map<WildcardDirectoryWatcher>, wildcardDirectories: Map<WatchDirectoryFlags>, watchDirectory: (directory: string, flags: WatchDirectoryFlags) => FileWatcher): void;
-    function isEmittedFileOfProgram(program: Program | undefined, file: string): boolean;
-    enum WatchLogLevel {
-        None = 0,
-        TriggerOnly = 1,
-        Verbose = 2
-    }
-    interface WatchFileHost {
-        watchFile(path: string, callback: FileWatcherCallback, pollingInterval?: number): FileWatcher;
-    }
-    interface WatchDirectoryHost {
-        watchDirectory(path: string, callback: DirectoryWatcherCallback, recursive?: boolean): FileWatcher;
-    }
-    type WatchFile<X, Y> = (host: WatchFileHost, file: string, callback: FileWatcherCallback, pollingInterval: PollingInterval, detailInfo1?: X, detailInfo2?: Y) => FileWatcher;
-    type FilePathWatcherCallback = (fileName: string, eventKind: FileWatcherEventKind, filePath: Path) => void;
-    type WatchFilePath<X, Y> = (host: WatchFileHost, file: string, callback: FilePathWatcherCallback, pollingInterval: PollingInterval, path: Path, detailInfo1?: X, detailInfo2?: Y) => FileWatcher;
-    type WatchDirectory<X, Y> = (host: WatchDirectoryHost, directory: string, callback: DirectoryWatcherCallback, flags: WatchDirectoryFlags, detailInfo1?: X, detailInfo2?: Y) => FileWatcher;
-    interface WatchFactory<X, Y> {
-        watchFile: WatchFile<X, Y>;
-        watchFilePath: WatchFilePath<X, Y>;
-        watchDirectory: WatchDirectory<X, Y>;
-    }
-    function getWatchFactory<X, Y = undefined>(watchLogLevel: WatchLogLevel, log: (s: string) => void, getDetailWatchInfo?: GetDetailWatchInfo<X, Y>): WatchFactory<X, Y>;
-    type GetDetailWatchInfo<X, Y> = (detailInfo1: X, detailInfo2: Y | undefined) => string;
-    function closeFileWatcherOf<T extends {
-        watcher: FileWatcher;
-    }>(objWithWatcher: T): void;
-}
-declare namespace ts {
-    function findConfigFile(searchPath: string, fileExists: (fileName: string) => boolean, configName?: string): string | undefined;
-    function resolveTripleslashReference(moduleName: string, containingFile: string): string;
-    function computeCommonSourceDirectoryOfFilenames(fileNames: string[], currentDirectory: string, getCanonicalFileName: GetCanonicalFileName): string;
-    function createCompilerHost(options: CompilerOptions, setParentNodes?: boolean): CompilerHost;
-    function getPreEmitDiagnostics(program: Program, sourceFile?: SourceFile, cancellationToken?: CancellationToken): Diagnostic[];
-    interface FormatDiagnosticsHost {
-        getCurrentDirectory(): string;
-        getCanonicalFileName(fileName: string): string;
-        getNewLine(): string;
-    }
-    function formatDiagnostics(diagnostics: ReadonlyArray<Diagnostic>, host: FormatDiagnosticsHost): string;
-    function formatDiagnostic(diagnostic: Diagnostic, host: FormatDiagnosticsHost): string;
-    /** @internal */
-    enum ForegroundColorEscapeSequences {
-        Grey = "\u001B[90m",
-        Red = "\u001B[91m",
-        Yellow = "\u001B[93m",
-        Blue = "\u001B[94m",
-        Cyan = "\u001B[96m"
-    }
-    /** @internal */
-    function formatColorAndReset(text: string, formatStyle: string): string;
-    function formatDiagnosticsWithColorAndContext(diagnostics: ReadonlyArray<Diagnostic>, host: FormatDiagnosticsHost): string;
-    function flattenDiagnosticMessageText(messageText: string | DiagnosticMessageChain | undefined, newLine: string): string;
-    /**
-     * Determines if program structure is upto date or needs to be recreated
-     */
-    function isProgramUptoDate(program: Program | undefined, rootFileNames: string[], newOptions: CompilerOptions, getSourceVersion: (path: Path) => string | undefined, fileExists: (fileName: string) => boolean, hasInvalidatedResolution: HasInvalidatedResolution, hasChangedAutomaticTypeDirectiveNames: boolean): boolean;
-    function getConfigFileParsingDiagnostics(configFileParseResult: ParsedCommandLine): ReadonlyArray<Diagnostic>;
-    /**
-     * Create a new 'Program' instance. A Program is an immutable collection of 'SourceFile's and a 'CompilerOptions'
-     * that represent a compilation unit.
-     *
-     * Creating a program proceeds from a set of root files, expanding the set of inputs by following imports and
-     * triple-slash-reference-path directives transitively. '@types' and triple-slash-reference-types are also pulled in.
-     *
-     * @param createProgramOptions - The options for creating a program.
-     * @returns A 'Program' object.
-     */
-    function createProgram(createProgramOptions: CreateProgramOptions): Program;
-    /**
-     * Create a new 'Program' instance. A Program is an immutable collection of 'SourceFile's and a 'CompilerOptions'
-     * that represent a compilation unit.
-     *
-     * Creating a program proceeds from a set of root files, expanding the set of inputs by following imports and
-     * triple-slash-reference-path directives transitively. '@types' and triple-slash-reference-types are also pulled in.
-     *
-     * @param rootNames - A set of root files.
-     * @param options - The compiler options which should be used.
-     * @param host - The host interacts with the underlying file system.
-     * @param oldProgram - Reuses an old program structure.
-     * @param configFileParsingDiagnostics - error during config file parsing
-     * @returns A 'Program' object.
-     */
-    function createProgram(rootNames: ReadonlyArray<string>, options: CompilerOptions, host?: CompilerHost, oldProgram?: Program, configFileParsingDiagnostics?: ReadonlyArray<Diagnostic>): Program;
-    function parseConfigHostFromCompilerHost(host: CompilerHost): ParseConfigFileHost;
-    /**
-     * Returns the target config filename of a project reference
-     */
-    function resolveProjectReferencePath(host: CompilerHost, ref: ProjectReference): string | undefined;
-    /**
-     * Returns a DiagnosticMessage if we won't include a resolved module due to its extension.
-     * The DiagnosticMessage's parameters are the imported module name, and the filename it resolved to.
-     * This returns a diagnostic even if the module will be an untyped module.
-     */
-    function getResolutionDiagnostic(options: CompilerOptions, { extension }: ResolvedModuleFull): DiagnosticMessage | undefined;
-}
-declare namespace ts {
-    interface EmitOutput {
-        outputFiles: OutputFile[];
-        emitSkipped: boolean;
-    }
-    interface OutputFile {
-        name: string;
-        writeByteOrderMark: boolean;
-        text: string;
-    }
-}
-declare namespace ts {
-    function getFileEmitOutput(program: Program, sourceFile: SourceFile, emitOnlyDtsFiles: boolean, cancellationToken?: CancellationToken, customTransformers?: CustomTransformers): EmitOutput;
-    interface BuilderState {
-        /**
-         * Information of the file eg. its version, signature etc
-         */
-        fileInfos: Map<BuilderState.FileInfo>;
-        /**
-         * Contains the map of ReferencedSet=Referenced files of the file if module emit is enabled
-         * Otherwise undefined
-         * Thus non undefined value indicates, module emit
-         */
-        readonly referencedMap: ReadonlyMap<BuilderState.ReferencedSet> | undefined;
-        /**
-         * Map of files that have already called update signature.
-         * That means hence forth these files are assumed to have
-         * no change in their signature for this version of the program
-         */
-        hasCalledUpdateShapeSignature: Map<true>;
-        /**
-         * Cache of all files excluding default library file for the current program
-         */
-        allFilesExcludingDefaultLibraryFile: ReadonlyArray<SourceFile> | undefined;
-        /**
-         * Cache of all the file names
-         */
-        allFileNames: ReadonlyArray<string> | undefined;
-    }
-}
-declare namespace ts.BuilderState {
-    /**
-     * Information about the source file: Its version and optional signature from last emit
-     */
-    interface FileInfo {
-        readonly version: string;
-        signature: string | undefined;
-    }
-    /**
-     * Referenced files with values for the keys as referenced file's path to be true
-     */
-    type ReferencedSet = ReadonlyMap<true>;
-    /**
-     * Compute the hash to store the shape of the file
-     */
-    type ComputeHash = (data: string) => string;
-    /**
-     * Returns true if oldState is reusable, that is the emitKind = module/non module has not changed
-     */
-    function canReuseOldState(newReferencedMap: ReadonlyMap<ReferencedSet> | undefined, oldState: Readonly<BuilderState> | undefined): boolean | undefined;
-    /**
-     * Creates the state of file references and signature for the new program from oldState if it is safe
-     */
-    function create(newProgram: Program, getCanonicalFileName: GetCanonicalFileName, oldState?: Readonly<BuilderState>): BuilderState;
-    /**
-     * Gets the files affected by the path from the program
-     */
-    function getFilesAffectedBy(state: BuilderState, programOfThisState: Program, path: Path, cancellationToken: CancellationToken | undefined, computeHash: ComputeHash, cacheToUpdateSignature?: Map<string>): ReadonlyArray<SourceFile>;
-    /**
-     * Updates the signatures from the cache into state's fileinfo signatures
-     * This should be called whenever it is safe to commit the state of the builder
-     */
-    function updateSignaturesFromCache(state: BuilderState, signatureCache: Map<string>): void;
-    /**
-     * Get all the dependencies of the sourceFile
-     */
-    function getAllDependencies(state: BuilderState, programOfThisState: Program, sourceFile: SourceFile): ReadonlyArray<string>;
-}
-declare namespace ts {
-    /**
-     * State to store the changed files, affected files and cache semantic diagnostics
-     */
-    interface BuilderProgramState extends BuilderState {
-        /**
-         * Cache of semantic diagnostics for files with their Path being the key
-         */
-        semanticDiagnosticsPerFile: Map<ReadonlyArray<Diagnostic>> | undefined;
-        /**
-         * The map has key by source file's path that has been changed
-         */
-        changedFilesSet: Map<true>;
-        /**
-         * Set of affected files being iterated
-         */
-        affectedFiles: ReadonlyArray<SourceFile> | undefined;
-        /**
-         * Current index to retrieve affected file from
-         */
-        affectedFilesIndex: number | undefined;
-        /**
-         * Current changed file for iterating over affected files
-         */
-        currentChangedFilePath: Path | undefined;
-        /**
-         * Map of file signatures, with key being file path, calculated while getting current changed file's affected files
-         * These will be commited whenever the iteration through affected files of current changed file is complete
-         */
-        currentAffectedFilesSignatures: Map<string> | undefined;
-        /**
-         * Already seen affected files
-         */
-        seenAffectedFiles: Map<true> | undefined;
-        /**
-         * program corresponding to this state
-         */
-        program: Program;
-    }
-    enum BuilderProgramKind {
-        SemanticDiagnosticsBuilderProgram = 0,
-        EmitAndSemanticDiagnosticsBuilderProgram = 1
-    }
-    interface BuilderCreationParameters {
-        newProgram: Program;
-        host: BuilderProgramHost;
-        oldProgram: BuilderProgram | undefined;
-        configFileParsingDiagnostics: ReadonlyArray<Diagnostic>;
-    }
-    function getBuilderCreationParameters(newProgramOrRootNames: Program | ReadonlyArray<string> | undefined, hostOrOptions: BuilderProgramHost | CompilerOptions | undefined, oldProgramOrHost?: BuilderProgram | CompilerHost, configFileParsingDiagnosticsOrOldProgram?: ReadonlyArray<Diagnostic> | BuilderProgram, configFileParsingDiagnostics?: ReadonlyArray<Diagnostic>): BuilderCreationParameters;
-    function createBuilderProgram(kind: BuilderProgramKind.SemanticDiagnosticsBuilderProgram, builderCreationParameters: BuilderCreationParameters): SemanticDiagnosticsBuilderProgram;
-    function createBuilderProgram(kind: BuilderProgramKind.EmitAndSemanticDiagnosticsBuilderProgram, builderCreationParameters: BuilderCreationParameters): EmitAndSemanticDiagnosticsBuilderProgram;
-}
-declare namespace ts {
-    type AffectedFileResult<T> = {
-        result: T;
-        affected: SourceFile | Program;
-    } | undefined;
-    interface BuilderProgramHost {
-        /**
-         * return true if file names are treated with case sensitivity
-         */
-        useCaseSensitiveFileNames(): boolean;
-        /**
-         * If provided this would be used this hash instead of actual file shape text for detecting changes
-         */
-        createHash?: (data: string) => string;
-        /**
-         * When emit or emitNextAffectedFile are called without writeFile,
-         * this callback if present would be used to write files
-         */
-        writeFile?: WriteFileCallback;
-    }
-    /**
-     * Builder to manage the program state changes
-     */
-    interface BuilderProgram {
-        getState(): BuilderProgramState;
-        /**
-         * Returns current program
-         */
-        getProgram(): Program;
-        /**
-         * Get compiler options of the program
-         */
-        getCompilerOptions(): CompilerOptions;
+        getCompilerOptions(): CompilerOptions;
         /**
          * Get the source file in the program with file name
          */
@@ -9140,99 +4304,6 @@ declare namespace ts {
     function createAbstractBuilder(newProgram: Program, host: BuilderProgramHost, oldProgram?: BuilderProgram, configFileParsingDiagnostics?: ReadonlyArray<Diagnostic>): BuilderProgram;
     function createAbstractBuilder(rootNames: ReadonlyArray<string> | undefined, options: CompilerOptions | undefined, host?: CompilerHost, oldProgram?: BuilderProgram, configFileParsingDiagnostics?: ReadonlyArray<Diagnostic>): BuilderProgram;
 }
-declare namespace ts {
-    /** This is the cache of module/typedirectives resolution that can be retained across program */
-    interface ResolutionCache {
-        startRecordingFilesWithChangedResolutions(): void;
-        finishRecordingFilesWithChangedResolutions(): Path[] | undefined;
-        resolveModuleNames(moduleNames: string[], containingFile: string, reusedNames: string[] | undefined): ResolvedModuleFull[];
-        getResolvedModuleWithFailedLookupLocationsFromCache(moduleName: string, containingFile: string): CachedResolvedModuleWithFailedLookupLocations | undefined;
-        resolveTypeReferenceDirectives(typeDirectiveNames: string[], containingFile: string): ResolvedTypeReferenceDirective[];
-        invalidateResolutionOfFile(filePath: Path): void;
-        removeResolutionsOfFile(filePath: Path): void;
-        setFilesWithInvalidatedNonRelativeUnresolvedImports(filesWithUnresolvedImports: Map<ReadonlyArray<string>>): void;
-        createHasInvalidatedResolution(forceAllFilesAsInvalidated?: boolean): HasInvalidatedResolution;
-        startCachingPerDirectoryResolution(): void;
-        finishCachingPerDirectoryResolution(): void;
-        updateTypeRootsWatch(): void;
-        closeTypeRootsWatch(): void;
-        clear(): void;
-    }
-    interface ResolutionWithFailedLookupLocations {
-        readonly failedLookupLocations: ReadonlyArray<string>;
-        isInvalidated?: boolean;
-        refCount?: number;
-    }
-    interface CachedResolvedModuleWithFailedLookupLocations extends ResolvedModuleWithFailedLookupLocations, ResolutionWithFailedLookupLocations {
-    }
-    interface ResolutionCacheHost extends ModuleResolutionHost {
-        toPath(fileName: string): Path;
-        getCanonicalFileName: GetCanonicalFileName;
-        getCompilationSettings(): CompilerOptions;
-        watchDirectoryOfFailedLookupLocation(directory: string, cb: DirectoryWatcherCallback, flags: WatchDirectoryFlags): FileWatcher;
-        onInvalidatedResolution(): void;
-        watchTypeRootsDirectory(directory: string, cb: DirectoryWatcherCallback, flags: WatchDirectoryFlags): FileWatcher;
-        onChangedAutomaticTypeDirectiveNames(): void;
-        getCachedDirectoryStructureHost(): CachedDirectoryStructureHost | undefined;
-        projectName?: string;
-        getGlobalCache?(): string | undefined;
-        writeLog(s: string): void;
-        maxNumberOfFilesToIterateForInvalidation?: number;
-        getCurrentProgram(): Program;
-    }
-    const maxNumberOfFilesToIterateForInvalidation = 256;
-    function createResolutionCache(resolutionHost: ResolutionCacheHost, rootDirForResolution: string | undefined, logChangesWhenResolvingModule: boolean): ResolutionCache;
-}
-declare namespace ts.moduleSpecifiers {
-    interface ModuleSpecifierPreferences {
-        importModuleSpecifierPreference?: "relative" | "non-relative";
-    }
-    function getModuleSpecifier(compilerOptions: CompilerOptions, fromSourceFile: SourceFile, fromSourceFileName: string, toFileName: string, host: ModuleSpecifierResolutionHost, preferences?: ModuleSpecifierPreferences): string;
-    function getModuleSpecifiers(moduleSymbol: Symbol, program: Program, importingSourceFile: SourceFile, host: ModuleSpecifierResolutionHost, preferences: ModuleSpecifierPreferences): ReadonlyArray<ReadonlyArray<string>>;
-}
-declare namespace ts {
-    /**
-     * Create a function that reports error by writing to the system and handles the formating of the diagnostic
-     */
-    function createDiagnosticReporter(system: System, pretty?: boolean): DiagnosticReporter;
-    /** @internal */
-    const nonClearingMessageCodes: number[];
-    /** @internal */
-    const screenStartingMessageCodes: number[];
-    /**
-     * Create a function that reports watch status by writing to the system and handles the formating of the diagnostic
-     */
-    function createWatchStatusReporter(system: System, pretty?: boolean): WatchStatusReporter;
-    /** Parses config file using System interface */
-    function parseConfigFileWithSystem(configFileName: string, optionsToExtend: CompilerOptions, system: System, reportDiagnostic: DiagnosticReporter): ParsedCommandLine | undefined;
-    /**
-     * Program structure needed to emit the files and report diagnostics
-     */
-    interface ProgramToEmitFilesAndReportErrors {
-        getCurrentDirectory(): string;
-        getCompilerOptions(): CompilerOptions;
-        getSourceFiles(): ReadonlyArray<SourceFile>;
-        getSyntacticDiagnostics(): ReadonlyArray<Diagnostic>;
-        getOptionsDiagnostics(): ReadonlyArray<Diagnostic>;
-        getGlobalDiagnostics(): ReadonlyArray<Diagnostic>;
-        getSemanticDiagnostics(): ReadonlyArray<Diagnostic>;
-        getConfigFileParsingDiagnostics(): ReadonlyArray<Diagnostic>;
-        emit(): EmitResult;
-    }
-    type ReportEmitErrorSummary = (errorCount: number) => void;
-    /**
-     * Helper that emit files, report diagnostics and lists emitted and/or source files depending on compiler options
-     */
-    function emitFilesAndReportErrors(program: ProgramToEmitFilesAndReportErrors, reportDiagnostic: DiagnosticReporter, writeFileName?: (s: string) => void, reportSummary?: ReportEmitErrorSummary): ExitStatus;
-    /**
-     * Creates the watch compiler host from system for config file in watch mode
-     */
-    function createWatchCompilerHostOfConfigFile<T extends BuilderProgram = EmitAndSemanticDiagnosticsBuilderProgram>(configFileName: string, optionsToExtend: CompilerOptions | undefined, system: System, createProgram?: CreateProgram<T>, reportDiagnostic?: DiagnosticReporter, reportWatchStatus?: WatchStatusReporter): WatchCompilerHostOfConfigFile<T>;
-    /**
-     * Creates the watch compiler host from system for compiling root files and options in watch mode
-     */
-    function createWatchCompilerHostOfFilesAndCompilerOptions<T extends BuilderProgram = EmitAndSemanticDiagnosticsBuilderProgram>(rootFiles: string[], options: CompilerOptions, system: System, createProgram?: CreateProgram<T>, reportDiagnostic?: DiagnosticReporter, reportWatchStatus?: WatchStatusReporter): WatchCompilerHostOfFilesAndCompilerOptions<T>;
-}
 declare namespace ts {
     type WatchStatusReporter = (diagnostic: Diagnostic, newLine: string, options: CompilerOptions) => void;
     /** Create the program with rootNames and options, if they are undefined, oldProgram and new configFile diagnostics create new program */
@@ -9246,7 +4317,6 @@ declare namespace ts {
         afterProgramCreate?(program: T): void;
         /** If provided, called with Diagnostic message that informs about change in watch status */
         onWatchStatusChange?(diagnostic: Diagnostic, newLine: string, options: CompilerOptions): void;
-        maxNumberOfFilesToIterateForInvalidation?: number;
         useCaseSensitiveFileNames(): boolean;
         getNewLine(): string;
         getCurrentDirectory(): string;
@@ -9288,12 +4358,6 @@ declare namespace ts {
         /** If provided, will be used to reset existing delayed compilation */
         clearTimeout?(timeoutId: any): void;
     }
-    /** Internal interface used to wire emit through same host */
-    interface WatchCompilerHost<T extends BuilderProgram> {
-        createDirectory?(path: string): void;
-        writeFile?(path: string, data: string, writeByteOrderMark?: boolean): void;
-        onCachedDirectoryStructureHostCreate?(host: CachedDirectoryStructureHost): void;
-    }
     /**
      * Host to create watch with root files and options
      */
@@ -9317,18 +4381,9 @@ declare namespace ts {
          */
         readDirectory(path: string, extensions?: ReadonlyArray<string>, exclude?: ReadonlyArray<string>, include?: ReadonlyArray<string>, depth?: number): string[];
     }
-    /**
-     * Host to create watch with config file that is already parsed (from tsc)
-     */
-    interface WatchCompilerHostOfConfigFile<T extends BuilderProgram> extends WatchCompilerHost<T> {
-        optionsToExtend?: CompilerOptions;
-        configFileParsingResult?: ParsedCommandLine;
-    }
     interface Watch<T> {
         /** Synchronize with host and get updated program */
         getProgram(): T;
-        /** Gets the existing program without synchronizing with changes on host */
-        getCurrentProgram(): T;
     }
     /**
      * Creates the watch what generates program using the config file
@@ -9513,16 +4568,16 @@ declare namespace ts {
         getKeys: () => ReadonlyArray<ResolvedConfigFileName>;
     };
     function createBuildContext(options: BuildOptions): BuildContext;
-    function performBuild(args: string[], compilerHost: CompilerHost, buildHost: BuildHost, system?: System): void;
+    function performBuild(args: string[], compilerHost: CompilerHost, buildHost: BuildHost, system?: System): number | undefined;
     /**
      * A SolutionBuilder has an immutable set of rootNames that are the "entry point" projects, but
      * can dynamically add/remove other projects based on changes on the rootNames' references
      */
     function createSolutionBuilder(compilerHost: CompilerHost, buildHost: BuildHost, rootNames: ReadonlyArray<string>, defaultOptions: BuildOptions, system?: System): {
-        buildAllProjects: () => void;
+        buildAllProjects: () => ExitStatus;
         getUpToDateStatus: (project: ParsedCommandLine | undefined) => UpToDateStatus;
         getUpToDateStatusOfFile: (configFileName: ResolvedConfigFileName) => UpToDateStatus;
-        cleanAllProjects: () => void;
+        cleanAllProjects: () => ExitStatus.Success | ExitStatus.DiagnosticsPresent_OutputsSkipped;
         resetBuildContext: (opts?: BuildOptions) => void;
         getBuildGraph: (configFileNames: ReadonlyArray<string>) => DependencyGraph | undefined;
         invalidateProject: (configFileName: string) => void;
@@ -9532,206 +4587,23 @@ declare namespace ts {
         startWatching: () => void;
     };
 }
-//# sourceMappingURL=compiler.d.ts.map
-declare namespace ts.server {
-    const ActionSet: ActionSet;
-    const ActionInvalidate: ActionInvalidate;
-    const ActionPackageInstalled: ActionPackageInstalled;
-    const EventTypesRegistry: EventTypesRegistry;
-    const EventBeginInstallTypes: EventBeginInstallTypes;
-    const EventEndInstallTypes: EventEndInstallTypes;
-    const EventInitializationFailed: EventInitializationFailed;
-    namespace Arguments {
-        const GlobalCacheLocation = "--globalTypingsCacheLocation";
-        const LogFile = "--logFile";
-        const EnableTelemetry = "--enableTelemetry";
-        const TypingSafeListLocation = "--typingSafeListLocation";
-        const TypesMapLocation = "--typesMapLocation";
-        /**
-         * This argument specifies the location of the NPM executable.
-         * typingsInstaller will run the command with `${npmLocation} install ...`.
-         */
-        const NpmLocation = "--npmLocation";
-    }
-    function hasArgument(argumentName: string): boolean;
-    function findArgument(argumentName: string): string | undefined;
-    function nowString(): string;
-}
-declare namespace ts.server {
-    type ActionSet = "action::set";
-    type ActionInvalidate = "action::invalidate";
-    type ActionPackageInstalled = "action::packageInstalled";
-    type EventTypesRegistry = "event::typesRegistry";
-    type EventBeginInstallTypes = "event::beginInstallTypes";
-    type EventEndInstallTypes = "event::endInstallTypes";
-    type EventInitializationFailed = "event::initializationFailed";
-    interface SortedReadonlyArray<T> extends ReadonlyArray<T> {
-        " __sortedArrayBrand": any;
-    }
-    interface TypingInstallerResponse {
-        readonly kind: ActionSet | ActionInvalidate | EventTypesRegistry | ActionPackageInstalled | EventBeginInstallTypes | EventEndInstallTypes | EventInitializationFailed;
-    }
-    interface TypingInstallerRequestWithProjectName {
-        readonly projectName: string;
-    }
-    type TypingInstallerRequestUnion = DiscoverTypings | CloseProject | TypesRegistryRequest | InstallPackageRequest;
-    interface DiscoverTypings extends TypingInstallerRequestWithProjectName {
-        readonly fileNames: string[];
-        readonly projectRootPath: Path;
-        readonly compilerOptions: CompilerOptions;
-        readonly typeAcquisition: TypeAcquisition;
-        readonly unresolvedImports: SortedReadonlyArray<string>;
-        readonly cachePath?: string;
-        readonly kind: "discover";
-    }
-    interface CloseProject extends TypingInstallerRequestWithProjectName {
-        readonly kind: "closeProject";
-    }
-    interface TypesRegistryRequest {
-        readonly kind: "typesRegistry";
-    }
-    interface InstallPackageRequest extends TypingInstallerRequestWithProjectName {
-        readonly kind: "installPackage";
-        readonly fileName: Path;
-        readonly packageName: string;
-        readonly projectRootPath: Path;
-    }
-    interface TypesRegistryResponse extends TypingInstallerResponse {
-        readonly kind: EventTypesRegistry;
-        readonly typesRegistry: MapLike<MapLike<string>>;
-    }
-    interface PackageInstalledResponse extends ProjectResponse {
-        readonly kind: ActionPackageInstalled;
-        readonly success: boolean;
-        readonly message: string;
-    }
-    interface InitializationFailedResponse extends TypingInstallerResponse {
-        readonly kind: EventInitializationFailed;
-        readonly message: string;
-    }
-    interface ProjectResponse extends TypingInstallerResponse {
-        readonly projectName: string;
-    }
-    interface InvalidateCachedTypings extends ProjectResponse {
-        readonly kind: ActionInvalidate;
-    }
-    interface InstallTypes extends ProjectResponse {
-        readonly kind: EventBeginInstallTypes | EventEndInstallTypes;
-        readonly eventId: number;
-        readonly typingsInstallerVersion: string;
-        readonly packagesToInstall: ReadonlyArray<string>;
-    }
-    interface BeginInstallTypes extends InstallTypes {
-        readonly kind: EventBeginInstallTypes;
-    }
-    interface EndInstallTypes extends InstallTypes {
-        readonly kind: EventEndInstallTypes;
-        readonly installSuccess: boolean;
-    }
-    interface InstallTypingHost extends JsTyping.TypingResolutionHost {
-        useCaseSensitiveFileNames: boolean;
-        writeFile(path: string, content: string): void;
-        createDirectory(path: string): void;
-        watchFile?(path: string, callback: FileWatcherCallback, pollingInterval?: number): FileWatcher;
-        watchDirectory?(path: string, callback: DirectoryWatcherCallback, recursive?: boolean): FileWatcher;
-    }
-    interface SetTypings extends ProjectResponse {
-        readonly typeAcquisition: TypeAcquisition;
-        readonly compilerOptions: CompilerOptions;
-        readonly typings: string[];
-        readonly unresolvedImports: SortedReadonlyArray<string>;
-        readonly kind: ActionSet;
-    }
-    type TypingInstallerResponseUnion = SetTypings | InvalidateCachedTypings | TypesRegistryResponse | PackageInstalledResponse | InstallTypes | InitializationFailedResponse;
-}
-declare namespace ts.JsTyping {
-    interface TypingResolutionHost {
-        directoryExists(path: string): boolean;
-        fileExists(fileName: string): boolean;
-        readFile(path: string, encoding?: string): string | undefined;
-        readDirectory(rootDir: string, extensions: ReadonlyArray<string>, excludes: ReadonlyArray<string> | undefined, includes: ReadonlyArray<string> | undefined, depth?: number): string[];
-    }
-    interface CachedTyping {
-        typingLocation: string;
-        version: Semver;
-    }
-    function isTypingUpToDate(cachedTyping: CachedTyping, availableTypingVersions: MapLike<string>): boolean;
-    const nodeCoreModuleList: ReadonlyArray<string>;
-    const nodeCoreModules: Map<true>;
-    /**
-     * A map of loose file names to library names that we are confident require typings
-     */
-    type SafeList = ReadonlyMap<string>;
-    function loadSafeList(host: TypingResolutionHost, safeListPath: Path): SafeList;
-    function loadTypesMap(host: TypingResolutionHost, typesMapPath: Path): SafeList | undefined;
-    /**
-     * @param host is the object providing I/O related operations.
-     * @param fileNames are the file names that belong to the same project
-     * @param projectRootPath is the path to the project root directory
-     * @param safeListPath is the path used to retrieve the safe list
-     * @param packageNameToTypingLocation is the map of package names to their cached typing locations and installed versions
-     * @param typeAcquisition is used to customize the typing acquisition process
-     * @param compilerOptions are used as a source for typing inference
-     */
-    function discoverTypings(host: TypingResolutionHost, log: ((message: string) => void) | undefined, fileNames: string[], projectRootPath: Path, safeList: SafeList, packageNameToTypingLocation: ReadonlyMap<CachedTyping>, typeAcquisition: TypeAcquisition, unresolvedImports: ReadonlyArray<string>, typesRegistry: ReadonlyMap<MapLike<string>>): {
-        cachedTypingPaths: string[];
-        newTypingNames: string[];
-        filesToWatch: string[];
-    };
-    enum PackageNameValidationResult {
-        Ok = 0,
-        ScopedPackagesNotSupported = 1,
-        EmptyName = 2,
-        NameTooLong = 3,
-        NameStartsWithDot = 4,
-        NameStartsWithUnderscore = 5,
-        NameContainsNonURISafeCharacters = 6
-    }
-    /**
-     * Validates package name using rules defined at https://docs.npmjs.com/files/package.json
-     */
-    function validatePackageName(packageName: string): PackageNameValidationResult;
-    function renderPackageNameValidationFailure(result: PackageNameValidationResult, typing: string): string;
-}
-declare namespace ts {
-    class Semver {
-        readonly major: number;
-        readonly minor: number;
-        readonly patch: number;
-        /**
-         * If true, this is `major.minor.0-next.patch`.
-         * If false, this is `major.minor.patch`.
-         */
-        readonly isPrerelease: boolean;
-        static parse(semver: string): Semver;
-        static fromRaw({ major, minor, patch, isPrerelease }: Semver): Semver;
-        private static tryParse;
-        private constructor();
-        readonly versionString: string;
-        equals(sem: Semver): boolean;
-        greaterThan(sem: Semver): boolean;
-    }
-}
-//# sourceMappingURL=jsTyping.d.ts.map
-declare namespace ts {
-    interface Node {
-        getSourceFile(): SourceFile;
-        getChildCount(sourceFile?: SourceFile): number;
-        getChildAt(index: number, sourceFile?: SourceFile): Node;
-        getChildren(sourceFile?: SourceFile): Node[];
-        getChildren(sourceFile?: SourceFileLike): Node[];
-        getStart(sourceFile?: SourceFile, includeJsDocComment?: boolean): number;
-        getStart(sourceFile?: SourceFileLike, includeJsDocComment?: boolean): number;
-        getFullStart(): number;
-        getEnd(): number;
-        getWidth(sourceFile?: SourceFileLike): number;
-        getFullWidth(): number;
-        getLeadingTriviaWidth(sourceFile?: SourceFile): number;
-        getFullText(sourceFile?: SourceFile): string;
-        getText(sourceFile?: SourceFile): string;
-        getFirstToken(sourceFile?: SourceFile): Node | undefined;
-        getLastToken(sourceFile?: SourceFile): Node | undefined;
-        forEachChild<T>(cbNode: (node: Node) => T | undefined, cbNodeArray?: (nodes: NodeArray<Node>) => T | undefined): T | undefined;
+declare namespace ts {
+    interface Node {
+        getSourceFile(): SourceFile;
+        getChildCount(sourceFile?: SourceFile): number;
+        getChildAt(index: number, sourceFile?: SourceFile): Node;
+        getChildren(sourceFile?: SourceFile): Node[];
+        getStart(sourceFile?: SourceFile, includeJsDocComment?: boolean): number;
+        getFullStart(): number;
+        getEnd(): number;
+        getWidth(sourceFile?: SourceFileLike): number;
+        getFullWidth(): number;
+        getLeadingTriviaWidth(sourceFile?: SourceFile): number;
+        getFullText(sourceFile?: SourceFile): string;
+        getText(sourceFile?: SourceFile): string;
+        getFirstToken(sourceFile?: SourceFile): Node | undefined;
+        getLastToken(sourceFile?: SourceFile): Node | undefined;
+        forEachChild<T>(cbNode: (node: Node) => T | undefined, cbNodeArray?: (nodes: NodeArray<Node>) => T | undefined): T | undefined;
     }
     interface Identifier {
         readonly text: string;
@@ -9778,20 +4650,14 @@ declare namespace ts {
         getJsDocTags(): JSDocTagInfo[];
     }
     interface SourceFile {
-        version: string;
-        scriptSnapshot: IScriptSnapshot | undefined;
-        nameTable: UnderscoreEscapedMap<number> | undefined;
-        getNamedDeclarations(): Map<Declaration[]>;
         getLineAndCharacterOfPosition(pos: number): LineAndCharacter;
         getLineEndOfPosition(pos: number): number;
         getLineStarts(): ReadonlyArray<number>;
         getPositionOfLineAndCharacter(line: number, character: number): number;
         update(newText: string, textChangeRange: TextChangeRange): SourceFile;
-        sourceMapper?: sourcemaps.SourceMapper;
     }
     interface SourceFileLike {
         getLineAndCharacterOfPosition(pos: number): LineAndCharacter;
-        sourceMapper?: sourcemaps.SourceMapper;
     }
     interface SourceMapSource {
         getLineAndCharacterOfPosition(pos: number): LineAndCharacter;
@@ -9860,8 +4726,6 @@ declare namespace ts {
         resolveModuleNames?(moduleNames: string[], containingFile: string, reusedNames?: string[]): ResolvedModule[];
         getResolvedModuleWithFailedLookupLocationsFromCache?(modulename: string, containingFile: string): ResolvedModuleWithFailedLookupLocations | undefined;
         resolveTypeReferenceDirectives?(typeDirectiveNames: string[], containingFile: string): ResolvedTypeReferenceDirective[];
-        hasInvalidatedResolution?: HasInvalidatedResolution;
-        hasChangedAutomaticTypeDirectiveNames?: boolean;
         getDirectories?(directoryName: string): string[];
         /**
          * Gets a set of custom transformers to use during emit.
@@ -9878,7 +4742,6 @@ declare namespace ts {
         readonly importModuleSpecifierPreference?: "relative" | "non-relative";
         readonly allowTextChangesInNewFiles?: boolean;
     }
-    const defaultPreferences: UserPreferences;
     interface LanguageService {
         cleanupSemanticCache(): void;
         getSyntacticDiagnostics(fileName: string): DiagnosticWithLocation[];
@@ -9950,7 +4813,6 @@ declare namespace ts {
         getEditsForFileRename(oldFilePath: string, newFilePath: string, formatOptions: FormatCodeSettings, preferences: UserPreferences | undefined): ReadonlyArray<FileTextChanges>;
         getEmitOutput(fileName: string, emitOnlyDtsFiles?: boolean): EmitOutput;
         getProgram(): Program | undefined;
-        getNonBoundSourceFile(fileName: string): SourceFile;
         dispose(): void;
     }
     interface JsxClosingTagInfo {
@@ -10061,9 +4923,6 @@ declare namespace ts {
     }
     type CodeActionCommand = InstallPackageAction;
     interface InstallPackageAction {
-        file: string;
-        type: "install package";
-        packageName: string;
     }
     /**
      * A set of one or more available refactoring actions, grouped under a parent refactoring.
@@ -10575,263 +5434,8 @@ declare namespace ts {
         jsxAttributeStringLiteralValue = 24
     }
 }
-interface PromiseConstructor {
-    new <T>(executor: (resolve: (value?: T | PromiseLike<T>) => void, reject: (reason?: any) => void) => void): Promise<T>;
-    reject(reason: any): Promise<never>;
-    all<T>(values: (T | PromiseLike<T>)[]): Promise<T[]>;
-}
-declare var Promise: PromiseConstructor;
-declare namespace ts {
-    const scanner: Scanner;
-    enum SemanticMeaning {
-        None = 0,
-        Value = 1,
-        Type = 2,
-        Namespace = 4,
-        All = 7
-    }
-    function getMeaningFromDeclaration(node: Node): SemanticMeaning;
-    function getMeaningFromLocation(node: Node): SemanticMeaning;
-    function isInRightSideOfInternalImportEqualsDeclaration(node: Node): boolean;
-    function isCallExpressionTarget(node: Node): boolean;
-    function isNewExpressionTarget(node: Node): boolean;
-    function climbPastPropertyAccess(node: Node): Node;
-    function getTargetLabel(referenceNode: Node, labelName: string): Identifier | undefined;
-    function isJumpStatementTarget(node: Node): node is Identifier & {
-        parent: BreakOrContinueStatement;
-    };
-    function isLabelOfLabeledStatement(node: Node): node is Identifier;
-    function isLabelName(node: Node): boolean;
-    function isRightSideOfQualifiedName(node: Node): boolean;
-    function isRightSideOfPropertyAccess(node: Node): boolean;
-    function isNameOfModuleDeclaration(node: Node): boolean;
-    function isNameOfFunctionDeclaration(node: Node): boolean;
-    function isLiteralNameOfPropertyDeclarationOrIndexAccess(node: StringLiteral | NumericLiteral): boolean;
-    function isExpressionOfExternalModuleImportEqualsDeclaration(node: Node): boolean;
-    function getContainerNode(node: Node): Declaration | undefined;
-    function getNodeKind(node: Node): ScriptElementKind;
-    function isThis(node: Node): boolean;
-    interface ListItemInfo {
-        listItemIndex: number;
-        list: Node;
-    }
-    function getLineStartPositionForPosition(position: number, sourceFile: SourceFileLike): number;
-    function rangeContainsRange(r1: TextRange, r2: TextRange): boolean;
-    function rangeContainsPosition(r: TextRange, pos: number): boolean;
-    function rangeContainsPositionExclusive(r: TextRange, pos: number): boolean;
-    function startEndContainsRange(start: number, end: number, range: TextRange): boolean;
-    function rangeContainsStartEnd(range: TextRange, start: number, end: number): boolean;
-    function rangeOverlapsWithStartEnd(r1: TextRange, start: number, end: number): boolean;
-    function startEndOverlapsWithStartEnd(start1: number, end1: number, start2: number, end2: number): boolean;
-    /**
-     * Assumes `candidate.start <= position` holds.
-     */
-    function positionBelongsToNode(candidate: Node, position: number, sourceFile: SourceFile): boolean;
-    function findListItemInfo(node: Node): ListItemInfo | undefined;
-    function hasChildOfKind(n: Node, kind: SyntaxKind, sourceFile: SourceFile): boolean;
-    function findChildOfKind<T extends Node>(n: Node, kind: T["kind"], sourceFile: SourceFileLike): T | undefined;
-    function findContainingList(node: Node): SyntaxList | undefined;
-    /**
-     * Gets the token whose text has range [start, end) and
-     * position >= start and (position < end or (position === end && token is literal or keyword or identifier))
-     */
-    function getTouchingPropertyName(sourceFile: SourceFile, position: number): Node;
-    /**
-     * Returns the token if position is in [start, end).
-     * If position === end, returns the preceding token if includeItemAtEndPosition(previousToken) === true
-     */
-    function getTouchingToken(sourceFile: SourceFile, position: number, includeJsDocComment: boolean, includePrecedingTokenAtEndPosition?: (n: Node) => boolean): Node;
-    /** Returns a token if position is in [start-of-leading-trivia, end) */
-    function getTokenAtPosition(sourceFile: SourceFile, position: number, includeJsDocComment: boolean, includeEndPosition?: boolean): Node;
-    /**
-     * The token on the left of the position is the token that strictly includes the position
-     * or sits to the left of the cursor if it is on a boundary. For example
-     *
-     *   fo|o               -> will return foo
-     *   foo <comment> |bar -> will return foo
-     *
-     */
-    function findTokenOnLeftOfPosition(file: SourceFile, position: number): Node | undefined;
-    function findNextToken(previousToken: Node, parent: Node, sourceFile: SourceFile): Node | undefined;
-    /**
-     * Finds the rightmost token satisfying `token.end <= position`,
-     * excluding `JsxText` tokens containing only whitespace.
-     */
-    function findPrecedingToken(position: number, sourceFile: SourceFile, startNode?: Node, includeJsDoc?: boolean): Node | undefined;
-    function isInString(sourceFile: SourceFile, position: number, previousToken?: Node | undefined): boolean;
-    /**
-     * returns true if the position is in between the open and close elements of an JSX expression.
-     */
-    function isInsideJsxElementOrAttribute(sourceFile: SourceFile, position: number): boolean;
-    function isInTemplateString(sourceFile: SourceFile, position: number): boolean;
-    function findPrecedingMatchingToken(token: Node, matchingTokenKind: SyntaxKind, sourceFile: SourceFile): Node | undefined;
-    interface PossibleTypeArgumentInfo {
-        readonly called: Identifier;
-        readonly nTypeArguments: number;
-    }
-    function isPossiblyTypeArgumentPosition(tokenIn: Node, sourceFile: SourceFile): PossibleTypeArgumentInfo | undefined;
-    /**
-     * Returns true if the cursor at position in sourceFile is within a comment.
-     *
-     * @param tokenAtPosition Must equal `getTokenAtPosition(sourceFile, position)
-     * @param predicate Additional predicate to test on the comment range.
-     */
-    function isInComment(sourceFile: SourceFile, position: number, tokenAtPosition?: Node, predicate?: (c: CommentRange) => boolean): boolean;
-    function hasDocComment(sourceFile: SourceFile, position: number): boolean | undefined;
-    function getNodeModifiers(node: Node): string;
-    function getTypeArgumentOrTypeParameterList(node: Node): NodeArray<Node> | undefined;
-    function isComment(kind: SyntaxKind): boolean;
-    function isStringOrRegularExpressionOrTemplateLiteral(kind: SyntaxKind): boolean;
-    function isPunctuation(kind: SyntaxKind): boolean;
-    function isInsideTemplateLiteral(node: TemplateLiteralToken, position: number, sourceFile: SourceFile): boolean;
-    function isAccessibilityModifier(kind: SyntaxKind): boolean;
-    function cloneCompilerOptions(options: CompilerOptions): CompilerOptions;
-    function isArrayLiteralOrObjectLiteralDestructuringPattern(node: Node): boolean;
-    function isInReferenceComment(sourceFile: SourceFile, position: number): boolean;
-    function isInNonReferenceComment(sourceFile: SourceFile, position: number): boolean;
-    function createTextSpanFromNode(node: Node, sourceFile?: SourceFile): TextSpan;
-    function createTextSpanFromRange(range: TextRange): TextSpan;
-    function createTextRangeFromSpan(span: TextSpan): TextRange;
-    function createTextChangeFromStartLength(start: number, length: number, newText: string): TextChange;
-    function createTextChange(span: TextSpan, newText: string): TextChange;
-    const typeKeywords: ReadonlyArray<SyntaxKind>;
-    function isTypeKeyword(kind: SyntaxKind): boolean;
-    /** True if the symbol is for an external module, as opposed to a namespace. */
-    function isExternalModuleSymbol(moduleSymbol: Symbol): boolean;
-    /** Returns `true` the first time it encounters a node and `false` afterwards. */
-    type NodeSeenTracker<T = Node> = (node: T) => boolean;
-    function nodeSeenTracker<T extends Node>(): NodeSeenTracker<T>;
-    function getSnapshotText(snap: IScriptSnapshot): string;
-    function repeatString(str: string, count: number): string;
-    function skipConstraint(type: Type): Type;
-    function getNameFromPropertyName(name: PropertyName): string | undefined;
-    function programContainsEs6Modules(program: Program): boolean;
-    function compilerOptionsIndicateEs6Modules(compilerOptions: CompilerOptions): boolean;
-    function hostUsesCaseSensitiveFileNames(host: LanguageServiceHost): boolean;
-    function hostGetCanonicalFileName(host: LanguageServiceHost): GetCanonicalFileName;
-    function makeImportIfNecessary(defaultImport: Identifier | undefined, namedImports: ReadonlyArray<ImportSpecifier> | undefined, moduleSpecifier: string, quotePreference: QuotePreference): ImportDeclaration | undefined;
-    function makeImport(defaultImport: Identifier | undefined, namedImports: ReadonlyArray<ImportSpecifier> | undefined, moduleSpecifier: string | Expression, quotePreference: QuotePreference): ImportDeclaration;
-    function makeStringLiteral(text: string, quotePreference: QuotePreference): StringLiteral;
-    enum QuotePreference {
-        Single = 0,
-        Double = 1
-    }
-    function getQuotePreference(sourceFile: SourceFile, preferences: UserPreferences): QuotePreference;
-    function symbolNameNoDefault(symbol: Symbol): string | undefined;
-    function symbolEscapedNameNoDefault(symbol: Symbol): __String | undefined;
-    function getPropertySymbolFromBindingElement(checker: TypeChecker, bindingElement: BindingElement & {
-        name: Identifier;
-    }): Symbol | undefined;
-    /**
-     * Find symbol of the given property-name and add the symbol to the given result array
-     * @param symbol a symbol to start searching for the given propertyName
-     * @param propertyName a name of property to search for
-     * @param result an array of symbol of found property symbols
-     * @param previousIterationSymbolsCache a cache of symbol from previous iterations of calling this function to prevent infinite revisiting of the same symbol.
-     *                                The value of previousIterationSymbol is undefined when the function is first called.
-     */
-    function getPropertySymbolsFromBaseTypes<T>(symbol: Symbol, propertyName: string, checker: TypeChecker, cb: (symbol: Symbol) => T | undefined): T | undefined;
-    function isMemberSymbolInBaseType(memberSymbol: Symbol, checker: TypeChecker): boolean;
-    class NodeSet {
-        private map;
-        add(node: Node): void;
-        has(node: Node): boolean;
-        forEach(cb: (node: Node) => void): void;
-        some(pred: (node: Node) => boolean): boolean;
-    }
-    function getParentNodeInSpan(node: Node | undefined, file: SourceFile, span: TextSpan): Node | undefined;
-}
-declare namespace ts {
-    function isFirstDeclarationOfSymbolParameter(symbol: Symbol): boolean;
-    function symbolPart(text: string, symbol: Symbol): SymbolDisplayPart;
-    function displayPart(text: string, kind: SymbolDisplayPartKind): SymbolDisplayPart;
-    function spacePart(): SymbolDisplayPart;
-    function keywordPart(kind: SyntaxKind): SymbolDisplayPart;
-    function punctuationPart(kind: SyntaxKind): SymbolDisplayPart;
-    function operatorPart(kind: SyntaxKind): SymbolDisplayPart;
-    function textOrKeywordPart(text: string): SymbolDisplayPart;
-    function textPart(text: string): SymbolDisplayPart;
-    /**
-     * The default is CRLF.
-     */
-    function getNewLineOrDefaultFromHost(host: LanguageServiceHost | LanguageServiceShimHost, formatSettings?: FormatCodeSettings): string;
-    function lineBreakPart(): SymbolDisplayPart;
-    function mapToDisplayParts(writeDisplayParts: (writer: DisplayPartsSymbolWriter) => void): SymbolDisplayPart[];
-    function typeToDisplayParts(typechecker: TypeChecker, type: Type, enclosingDeclaration?: Node, flags?: TypeFormatFlags): SymbolDisplayPart[];
-    function symbolToDisplayParts(typeChecker: TypeChecker, symbol: Symbol, enclosingDeclaration?: Node, meaning?: SymbolFlags, flags?: SymbolFormatFlags): SymbolDisplayPart[];
-    function signatureToDisplayParts(typechecker: TypeChecker, signature: Signature, enclosingDeclaration?: Node, flags?: TypeFormatFlags): SymbolDisplayPart[];
-    function isImportOrExportSpecifierName(location: Node): location is Identifier;
-    /**
-     * Strip off existed single quotes or double quotes from a given string
-     *
-     * @return non-quoted string
-     */
-    function stripQuotes(name: string): string;
-    function startsWithQuote(name: string): boolean;
-    function scriptKindIs(fileName: string, host: LanguageServiceHost, ...scriptKinds: ScriptKind[]): boolean;
-    function getScriptKind(fileName: string, host?: LanguageServiceHost): ScriptKind;
-    function getUniqueSymbolId(symbol: Symbol, checker: TypeChecker): number;
-    function getFirstNonSpaceCharacterPosition(text: string, position: number): number;
-    /**
-     * Creates a deep, memberwise clone of a node with no source map location.
-     *
-     * WARNING: This is an expensive operation and is only intended to be used in refactorings
-     * and code fixes (because those are triggered by explicit user actions).
-     */
-    function getSynthesizedDeepClone<T extends Node | undefined>(node: T, includeTrivia?: boolean): T;
-    function getSynthesizedDeepClones<T extends Node>(nodes: NodeArray<T>, includeTrivia?: boolean): NodeArray<T>;
-    function getSynthesizedDeepClones<T extends Node>(nodes: NodeArray<T> | undefined, includeTrivia?: boolean): NodeArray<T> | undefined;
-    /**
-     * Sets EmitFlags to suppress leading and trailing trivia on the node.
-     */
-    function suppressLeadingAndTrailingTrivia(node: Node): void;
-    /**
-     * Sets EmitFlags to suppress leading trivia on the node.
-     */
-    function suppressLeadingTrivia(node: Node): void;
-    /**
-     * Sets EmitFlags to suppress trailing trivia on the node.
-     */
-    function suppressTrailingTrivia(node: Node): void;
-    function getUniqueName(baseName: string, sourceFile: SourceFile): string;
-    /**
-     * @return The index of the (only) reference to the extracted symbol.  We want the cursor
-     * to be on the reference, rather than the declaration, because it's closer to where the
-     * user was before extracting it.
-     */
-    function getRenameLocation(edits: ReadonlyArray<FileTextChanges>, renameFilename: string, name: string, preferLastLocation: boolean): number;
-    function copyComments(sourceNode: Node, targetNode: Node, sourceFile: SourceFile, commentKind?: CommentKind, hasTrailingNewLine?: boolean): void;
-}
 declare namespace ts {
     function createClassifier(): Classifier;
-    function getSemanticClassifications(typeChecker: TypeChecker, cancellationToken: CancellationToken, sourceFile: SourceFile, classifiableNames: UnderscoreEscapedMap<true>, span: TextSpan): ClassifiedSpan[];
-    function getEncodedSemanticClassifications(typeChecker: TypeChecker, cancellationToken: CancellationToken, sourceFile: SourceFile, classifiableNames: UnderscoreEscapedMap<true>, span: TextSpan): Classifications;
-    function getSyntacticClassifications(cancellationToken: CancellationToken, sourceFile: SourceFile, span: TextSpan): ClassifiedSpan[];
-    function getEncodedSyntacticClassifications(cancellationToken: CancellationToken, sourceFile: SourceFile, span: TextSpan): Classifications;
-}
-declare namespace ts.Completions.PathCompletions {
-    interface NameAndKind {
-        readonly name: string;
-        readonly kind: ScriptElementKind.scriptElement | ScriptElementKind.directory | ScriptElementKind.externalModuleName;
-    }
-    interface PathCompletion extends NameAndKind {
-        readonly span: TextSpan | undefined;
-    }
-    function getStringLiteralCompletionsFromModuleNames(sourceFile: SourceFile, node: LiteralExpression, compilerOptions: CompilerOptions, host: LanguageServiceHost, typeChecker: TypeChecker): ReadonlyArray<PathCompletion>;
-    function getTripleSlashReferenceCompletion(sourceFile: SourceFile, position: number, compilerOptions: CompilerOptions, host: LanguageServiceHost): ReadonlyArray<PathCompletion> | undefined;
-}
-declare namespace ts.Completions {
-    type Log = (message: string) => void;
-    function getCompletionsAtPosition(host: LanguageServiceHost, program: Program, log: Log, sourceFile: SourceFile, position: number, preferences: UserPreferences, triggerCharacter: CompletionsTriggerCharacter | undefined): CompletionInfo | undefined;
-    interface CompletionEntryIdentifier {
-        name: string;
-        source?: string;
-    }
-    function getCompletionEntryDetails(program: Program, log: Log, sourceFile: SourceFile, position: number, entryId: CompletionEntryIdentifier, host: LanguageServiceHost, formatContext: formatting.FormatContext, getCanonicalFileName: GetCanonicalFileName, preferences: UserPreferences, cancellationToken: CancellationToken): CompletionEntryDetails | undefined;
-    function getCompletionEntrySymbol(program: Program, log: Log, sourceFile: SourceFile, position: number, entryId: CompletionEntryIdentifier): Symbol | undefined;
-}
-declare namespace ts.DocumentHighlights {
-    function getDocumentHighlights(program: Program, cancellationToken: CancellationToken, sourceFile: SourceFile, position: number, sourceFilesToSearch: ReadonlyArray<SourceFile>): DocumentHighlights[] | undefined;
 }
 declare namespace ts {
     /**
@@ -10892,271 +5496,16 @@ declare namespace ts {
          */
         releaseDocument(fileName: string, compilationSettings: CompilerOptions): void;
         releaseDocumentWithKey(path: Path, key: DocumentRegistryBucketKey): void;
-        getLanguageServiceRefCounts(path: Path): [string, number | undefined][];
         reportStats(): string;
     }
-    interface ExternalDocumentCache {
-        setDocument(key: DocumentRegistryBucketKey, path: Path, sourceFile: SourceFile): void;
-        getDocument(key: DocumentRegistryBucketKey, path: Path): SourceFile | undefined;
-    }
     type DocumentRegistryBucketKey = string & {
         __bucketKey: any;
     };
     function createDocumentRegistry(useCaseSensitiveFileNames?: boolean, currentDirectory?: string): DocumentRegistry;
-    function createDocumentRegistryInternal(useCaseSensitiveFileNames?: boolean, currentDirectory?: string, externalCache?: ExternalDocumentCache): DocumentRegistry;
-}
-declare namespace ts.FindAllReferences {
-    interface ImportsResult {
-        /** For every import of the symbol, the location and local symbol for the import. */
-        importSearches: ReadonlyArray<[Identifier, Symbol]>;
-        /** For rename imports/exports `{ foo as bar }`, `foo` is not a local, so it may be added as a reference immediately without further searching. */
-        singleReferences: ReadonlyArray<Identifier | StringLiteral>;
-        /** List of source files that may (or may not) use the symbol via a namespace. (For UMD modules this is every file.) */
-        indirectUsers: ReadonlyArray<SourceFile>;
-    }
-    type ImportTracker = (exportSymbol: Symbol, exportInfo: ExportInfo, isForRename: boolean) => ImportsResult;
-    /** Creates the imports map and returns an ImportTracker that uses it. Call this lazily to avoid calling `getDirectImportsMap` unnecessarily.  */
-    function createImportTracker(sourceFiles: ReadonlyArray<SourceFile>, sourceFilesSet: ReadonlyMap<true>, checker: TypeChecker, cancellationToken: CancellationToken): ImportTracker;
-    /** Info about an exported symbol to perform recursive search on. */
-    interface ExportInfo {
-        exportingModuleSymbol: Symbol;
-        exportKind: ExportKind;
-    }
-    enum ExportKind {
-        Named = 0,
-        Default = 1,
-        ExportEquals = 2
-    }
-    enum ImportExport {
-        Import = 0,
-        Export = 1
-    }
-    type ModuleReference = {
-        kind: "import";
-        literal: StringLiteralLike;
-    }
-    /** <reference path> or <reference types> */
-     | {
-        kind: "reference";
-        referencingFile: SourceFile;
-        ref: FileReference;
-    };
-    function findModuleReferences(program: Program, sourceFiles: ReadonlyArray<SourceFile>, searchModuleSymbol: Symbol): ModuleReference[];
-    interface ImportedSymbol {
-        kind: ImportExport.Import;
-        symbol: Symbol;
-        isNamedImport: boolean;
-    }
-    interface ExportedSymbol {
-        kind: ImportExport.Export;
-        symbol: Symbol;
-        exportInfo: ExportInfo;
-    }
-    /**
-     * Given a local reference, we might notice that it's an import/export and recursively search for references of that.
-     * If at an import, look locally for the symbol it imports.
-     * If an an export, look for all imports of it.
-     * This doesn't handle export specifiers; that is done in `getReferencesAtExportSpecifier`.
-     * @param comingFromExport If we are doing a search for all exports, don't bother looking backwards for the imported symbol, since that's the reason we're here.
-     */
-    function getImportOrExportSymbol(node: Node, symbol: Symbol, checker: TypeChecker, comingFromExport: boolean): ImportedSymbol | ExportedSymbol | undefined;
-    function getExportInfo(exportSymbol: Symbol, exportKind: ExportKind, checker: TypeChecker): ExportInfo | undefined;
-}
-declare namespace ts.FindAllReferences {
-    interface SymbolAndEntries {
-        definition: Definition | undefined;
-        references: Entry[];
-    }
-    type Definition = {
-        type: "symbol";
-        symbol: Symbol;
-    } | {
-        type: "label";
-        node: Identifier;
-    } | {
-        type: "keyword";
-        node: Node;
-    } | {
-        type: "this";
-        node: Node;
-    } | {
-        type: "string";
-        node: StringLiteral;
-    };
-    type Entry = NodeEntry | SpanEntry;
-    interface NodeEntry {
-        type: "node";
-        node: Node;
-        isInString?: true;
-    }
-    interface SpanEntry {
-        type: "span";
-        fileName: string;
-        textSpan: TextSpan;
-    }
-    function nodeEntry(node: Node, isInString?: true): NodeEntry;
-    interface Options {
-        readonly findInStrings?: boolean;
-        readonly findInComments?: boolean;
-        /**
-         * True if we are renaming the symbol.
-         * If so, we will find fewer references -- if it is referenced by several different names, we sill only find references for the original name.
-         */
-        readonly isForRename?: boolean;
-        /** True if we are searching for implementations. We will have a different method of adding references if so. */
-        readonly implementations?: boolean;
-    }
-    function findReferencedSymbols(program: Program, cancellationToken: CancellationToken, sourceFiles: ReadonlyArray<SourceFile>, sourceFile: SourceFile, position: number): ReferencedSymbol[] | undefined;
-    function getImplementationsAtPosition(program: Program, cancellationToken: CancellationToken, sourceFiles: ReadonlyArray<SourceFile>, sourceFile: SourceFile, position: number): ImplementationLocation[] | undefined;
-    function findReferencedEntries(program: Program, cancellationToken: CancellationToken, sourceFiles: ReadonlyArray<SourceFile>, sourceFile: SourceFile, position: number, options?: Options): ReferenceEntry[] | undefined;
-    function getReferenceEntriesForNode(position: number, node: Node, program: Program, sourceFiles: ReadonlyArray<SourceFile>, cancellationToken: CancellationToken, options?: Options, sourceFilesSet?: ReadonlyMap<true>): Entry[] | undefined;
-    function toHighlightSpan(entry: Entry): {
-        fileName: string;
-        span: HighlightSpan;
-    };
-}
-/** Encapsulates the core find-all-references algorithm. */
-declare namespace ts.FindAllReferences.Core {
-    /** Core find-all-references algorithm. Handles special cases before delegating to `getReferencedSymbolsForSymbol`. */
-    function getReferencedSymbolsForNode(position: number, node: Node, program: Program, sourceFiles: ReadonlyArray<SourceFile>, cancellationToken: CancellationToken, options?: Options, sourceFilesSet?: ReadonlyMap<true>): SymbolAndEntries[] | undefined;
-    /** Used as a quick check for whether a symbol is used at all in a file (besides its definition). */
-    function isSymbolReferencedInFile(definition: Identifier, checker: TypeChecker, sourceFile: SourceFile): boolean;
-    function eachSymbolReferenceInFile<T>(definition: Identifier, checker: TypeChecker, sourceFile: SourceFile, cb: (token: Identifier) => T): T | undefined;
-    /**
-     * Given an initial searchMeaning, extracted from a location, widen the search scope based on the declarations
-     * of the corresponding symbol. e.g. if we are searching for "Foo" in value position, but "Foo" references a class
-     * then we need to widen the search to include type positions as well.
-     * On the contrary, if we are searching for "Bar" in type position and we trace bar to an interface, and an uninstantiated
-     * module, we want to keep the search limited to only types, as the two declarations (interface and uninstantiated module)
-     * do not intersect in any of the three spaces.
-     */
-    function getIntersectingMeaningFromDeclarations(node: Node, symbol: Symbol): SemanticMeaning;
-    function getReferenceEntriesForShorthandPropertyAssignment(node: Node, checker: TypeChecker, addReference: (node: Node) => void): void;
-}
-declare namespace ts {
-    function getEditsForFileRename(program: Program, oldFileOrDirPath: string, newFileOrDirPath: string, host: LanguageServiceHost, formatContext: formatting.FormatContext, preferences: UserPreferences): ReadonlyArray<FileTextChanges>;
-}
-declare namespace ts.GoToDefinition {
-    function getDefinitionAtPosition(program: Program, sourceFile: SourceFile, position: number): DefinitionInfo[] | undefined;
-    function getReferenceAtPosition(sourceFile: SourceFile, position: number, program: Program): {
-        fileName: string;
-        file: SourceFile;
-    } | undefined;
-    function getTypeDefinitionAtPosition(typeChecker: TypeChecker, sourceFile: SourceFile, position: number): DefinitionInfo[] | undefined;
-    function getDefinitionAndBoundSpan(program: Program, sourceFile: SourceFile, position: number): DefinitionInfoAndBoundSpan | undefined;
-    function findReferenceInPosition(refs: ReadonlyArray<FileReference>, pos: number): FileReference | undefined;
-}
-declare namespace ts.JsDoc {
-    function getJsDocCommentsFromDeclarations(declarations: ReadonlyArray<Declaration>): SymbolDisplayPart[];
-    function getJsDocTagsFromDeclarations(declarations?: Declaration[]): JSDocTagInfo[];
-    function getJSDocTagNameCompletions(): CompletionEntry[];
-    const getJSDocTagNameCompletionDetails: typeof getJSDocTagCompletionDetails;
-    function getJSDocTagCompletions(): CompletionEntry[];
-    function getJSDocTagCompletionDetails(name: string): CompletionEntryDetails;
-    function getJSDocParameterNameCompletions(tag: JSDocParameterTag): CompletionEntry[];
-    function getJSDocParameterNameCompletionDetails(name: string): CompletionEntryDetails;
-    /**
-     * Checks if position points to a valid position to add JSDoc comments, and if so,
-     * returns the appropriate template. Otherwise returns an empty string.
-     * Valid positions are
-     *      - outside of comments, statements, and expressions, and
-     *      - preceding a:
-     *          - function/constructor/method declaration
-     *          - class declarations
-     *          - variable statements
-     *          - namespace declarations
-     *          - interface declarations
-     *          - method signatures
-     *          - type alias declarations
-     *
-     * Hosts should ideally check that:
-     * - The line is all whitespace up to 'position' before performing the insertion.
-     * - If the keystroke sequence "/\*\*" induced the call, we also check that the next
-     * non-whitespace character is '*', which (approximately) indicates whether we added
-     * the second '*' to complete an existing (JSDoc) comment.
-     * @param fileName The file in which to perform the check.
-     * @param position The (character-indexed) position in the file where the check should
-     * be performed.
-     */
-    function getDocCommentTemplateAtPosition(newLine: string, sourceFile: SourceFile, position: number): TextInsertion | undefined;
-}
-declare namespace ts.NavigateTo {
-    function getNavigateToItems(sourceFiles: ReadonlyArray<SourceFile>, checker: TypeChecker, cancellationToken: CancellationToken, searchValue: string, maxResultCount: number | undefined, excludeDtsFiles: boolean): NavigateToItem[];
-}
-declare namespace ts.NavigationBar {
-    function getNavigationBarItems(sourceFile: SourceFile, cancellationToken: CancellationToken): NavigationBarItem[];
-    function getNavigationTree(sourceFile: SourceFile, cancellationToken: CancellationToken): NavigationTree;
-}
-declare namespace ts.OrganizeImports {
-    /**
-     * Organize imports by:
-     *   1) Removing unused imports
-     *   2) Coalescing imports from the same module
-     *   3) Sorting imports
-     */
-    function organizeImports(sourceFile: SourceFile, formatContext: formatting.FormatContext, host: LanguageServiceHost, program: Program, _preferences: UserPreferences): FileTextChanges[];
-    /**
-     * @param importGroup a list of ImportDeclarations, all with the same module name.
-     */
-    function coalesceImports(importGroup: ReadonlyArray<ImportDeclaration>): ReadonlyArray<ImportDeclaration>;
-    /**
-     * @param exportGroup a list of ExportDeclarations, all with the same module name.
-     */
-    function coalesceExports(exportGroup: ReadonlyArray<ExportDeclaration>): ReadonlyArray<ExportDeclaration>;
-    function compareModuleSpecifiers(m1: Expression, m2: Expression): Comparison;
-}
-declare namespace ts.OutliningElementsCollector {
-    function collectElements(sourceFile: SourceFile, cancellationToken: CancellationToken): OutliningSpan[];
-}
-declare namespace ts {
-    enum PatternMatchKind {
-        exact = 0,
-        prefix = 1,
-        substring = 2,
-        camelCase = 3
-    }
-    interface PatternMatch {
-        kind: PatternMatchKind;
-        isCaseSensitive: boolean;
-    }
-    interface PatternMatcher {
-        getMatchForLastSegmentOfPattern(candidate: string): PatternMatch | undefined;
-        getFullMatch(candidateContainers: ReadonlyArray<string>, candidate: string): PatternMatch | undefined;
-        patternContainsDots: boolean;
-    }
-    function createPatternMatcher(pattern: string): PatternMatcher | undefined;
-    function breakIntoCharacterSpans(identifier: string): TextSpan[];
-    function breakIntoWordSpans(identifier: string): TextSpan[];
 }
 declare namespace ts {
     function preProcessFile(sourceText: string, readImportFiles?: boolean, detectJavaScriptImports?: boolean): PreProcessedFileInfo;
 }
-declare namespace ts.Rename {
-    function getRenameInfo(typeChecker: TypeChecker, defaultLibFileName: string, getCanonicalFileName: GetCanonicalFileName, sourceFile: SourceFile, position: number): RenameInfo;
-}
-declare namespace ts.SignatureHelp {
-    function getSignatureHelpItems(program: Program, sourceFile: SourceFile, position: number, cancellationToken: CancellationToken): SignatureHelpItems | undefined;
-    interface ArgumentInfoForCompletions {
-        readonly invocation: CallLikeExpression;
-        readonly argumentIndex: number;
-        readonly argumentCount: number;
-    }
-    function getArgumentInfoForCompletions(node: Node, position: number, sourceFile: SourceFile): ArgumentInfoForCompletions | undefined;
-}
-declare namespace ts {
-    function computeSuggestionDiagnostics(sourceFile: SourceFile, program: Program, cancellationToken: CancellationToken): DiagnosticWithLocation[];
-}
-declare namespace ts.SymbolDisplay {
-    function getSymbolKind(typeChecker: TypeChecker, symbol: Symbol, location: Node): ScriptElementKind;
-    function getSymbolModifiers(symbol: Symbol): string;
-    interface SymbolDisplayPartsDocumentationAndSymbolKind {
-        displayParts: SymbolDisplayPart[];
-        documentation: SymbolDisplayPart[];
-        symbolKind: ScriptElementKind;
-        tags: JSDocTagInfo[] | undefined;
-    }
-    function getSymbolDisplayPartsDocumentationAndSymbolKind(typeChecker: TypeChecker, symbol: Symbol, sourceFile: SourceFile, enclosingDeclaration: Node | undefined, location: Node, semanticMeaning?: SemanticMeaning, alias?: Symbol): SymbolDisplayPartsDocumentationAndSymbolKind;
-}
 declare namespace ts {
     interface TranspileOptions {
         compilerOptions?: CompilerOptions;
@@ -11173,542 +5522,10 @@ declare namespace ts {
     }
     function transpileModule(input: string, transpileOptions: TranspileOptions): TranspileOutput;
     function transpile(input: string, compilerOptions?: CompilerOptions, fileName?: string, diagnostics?: Diagnostic[], moduleName?: string): string;
-    /** JS users may pass in string values for enum compiler options (such as ModuleKind), so convert. */
-    function fixupCompilerOptions(options: CompilerOptions, diagnostics: Diagnostic[]): CompilerOptions;
-}
-declare namespace ts.formatting {
-    enum FormattingRequestKind {
-        FormatDocument = 0,
-        FormatSelection = 1,
-        FormatOnEnter = 2,
-        FormatOnSemicolon = 3,
-        FormatOnOpeningCurlyBrace = 4,
-        FormatOnClosingCurlyBrace = 5
-    }
-    class FormattingContext {
-        readonly sourceFile: SourceFileLike;
-        formattingRequestKind: FormattingRequestKind;
-        options: FormatCodeSettings;
-        currentTokenSpan: TextRangeWithKind;
-        nextTokenSpan: TextRangeWithKind;
-        contextNode: Node;
-        currentTokenParent: Node;
-        nextTokenParent: Node;
-        private contextNodeAllOnSameLine;
-        private nextNodeAllOnSameLine;
-        private tokensAreOnSameLine;
-        private contextNodeBlockIsOnOneLine;
-        private nextNodeBlockIsOnOneLine;
-        constructor(sourceFile: SourceFileLike, formattingRequestKind: FormattingRequestKind, options: FormatCodeSettings);
-        updateContext(currentRange: TextRangeWithKind, currentTokenParent: Node, nextRange: TextRangeWithKind, nextTokenParent: Node, commonParent: Node): void;
-        ContextNodeAllOnSameLine(): boolean;
-        NextNodeAllOnSameLine(): boolean;
-        TokensAreOnSameLine(): boolean;
-        ContextNodeBlockIsOnOneLine(): boolean;
-        NextNodeBlockIsOnOneLine(): boolean;
-        private NodeIsOnOneLine;
-        private BlockIsOnOneLine;
-    }
-}
-declare namespace ts.formatting {
-    interface FormattingScanner {
-        advance(): void;
-        isOnToken(): boolean;
-        readTokenInfo(n: Node): TokenInfo;
-        getCurrentLeadingTrivia(): TextRangeWithKind[] | undefined;
-        lastTrailingTriviaWasNewLine(): boolean;
-        skipToEndOf(node: Node): void;
-    }
-    function getFormattingScanner<T>(text: string, languageVariant: LanguageVariant, startPos: number, endPos: number, cb: (scanner: FormattingScanner) => T): T;
-}
-declare namespace ts.formatting {
-    interface Rule {
-        readonly debugName: string;
-        readonly context: ReadonlyArray<ContextPredicate>;
-        readonly action: RuleAction;
-        readonly flags: RuleFlags;
-    }
-    type ContextPredicate = (context: FormattingContext) => boolean;
-    const anyContext: ReadonlyArray<ContextPredicate>;
-    enum RuleAction {
-        Ignore = 1,
-        Space = 2,
-        NewLine = 4,
-        Delete = 8
-    }
-    enum RuleFlags {
-        None = 0,
-        CanDeleteNewLines = 1
-    }
-    interface TokenRange {
-        readonly tokens: ReadonlyArray<SyntaxKind>;
-        readonly isSpecific: boolean;
-    }
-}
-declare namespace ts.formatting {
-    interface RuleSpec {
-        readonly leftTokenRange: TokenRange;
-        readonly rightTokenRange: TokenRange;
-        readonly rule: Rule;
-    }
-    function getAllRules(): RuleSpec[];
-}
-declare namespace ts.formatting {
-    function getFormatContext(options: FormatCodeSettings): FormatContext;
-    type RulesMap = (context: FormattingContext) => Rule | undefined;
-}
-declare namespace ts.formatting {
-    interface FormatContext {
-        readonly options: FormatCodeSettings;
-        readonly getRule: RulesMap;
-    }
-    interface TextRangeWithKind extends TextRange {
-        kind: SyntaxKind;
-    }
-    interface TextRangeWithTriviaKind extends TextRange {
-        kind: TriviaKind;
-    }
-    interface TokenInfo {
-        leadingTrivia: TextRangeWithTriviaKind[] | undefined;
-        token: TextRangeWithKind;
-        trailingTrivia: TextRangeWithTriviaKind[] | undefined;
-    }
-    function formatOnEnter(position: number, sourceFile: SourceFile, formatContext: FormatContext): TextChange[];
-    function formatOnSemicolon(position: number, sourceFile: SourceFile, formatContext: FormatContext): TextChange[];
-    function formatOnOpeningCurly(position: number, sourceFile: SourceFile, formatContext: FormatContext): TextChange[];
-    function formatOnClosingCurly(position: number, sourceFile: SourceFile, formatContext: FormatContext): TextChange[];
-    function formatDocument(sourceFile: SourceFile, formatContext: FormatContext): TextChange[];
-    function formatSelection(start: number, end: number, sourceFile: SourceFile, formatContext: FormatContext): TextChange[];
-    function formatNodeGivenIndentation(node: Node, sourceFileLike: SourceFileLike, languageVariant: LanguageVariant, initialIndentation: number, delta: number, formatContext: FormatContext): TextChange[];
-    /**
-     * @param precedingToken pass `null` if preceding token was already computed and result was `undefined`.
-     */
-    function getRangeOfEnclosingComment(sourceFile: SourceFile, position: number, onlyMultiLine: boolean, precedingToken?: Node | null, // tslint:disable-line:no-null-keyword
-    tokenAtPosition?: Node, predicate?: (c: CommentRange) => boolean): CommentRange | undefined;
-    function getIndentationString(indentation: number, options: EditorSettings): string;
-}
-declare namespace ts.formatting {
-    namespace SmartIndenter {
-        /**
-         * @param assumeNewLineBeforeCloseBrace
-         * `false` when called on text from a real source file.
-         * `true` when we need to assume `position` is on a newline.
-         *
-         * This is useful for codefixes. Consider
-         * ```
-         * function f() {
-         * |}
-         * ```
-         * with `position` at `|`.
-         *
-         * When inserting some text after an open brace, we would like to get indentation as if a newline was already there.
-         * By default indentation at `position` will be 0 so 'assumeNewLineBeforeCloseBrace' overrides this behavior.
-         */
-        function getIndentation(position: number, sourceFile: SourceFile, options: EditorSettings, assumeNewLineBeforeCloseBrace?: boolean): number;
-        function getIndentationForNode(n: Node, ignoreActualIndentationRange: TextRange, sourceFile: SourceFile, options: EditorSettings): number;
-        function getBaseIndentation(options: EditorSettings): number;
-        function isArgumentAndStartLineOverlapsExpressionBeingCalled(parent: Node, child: Node, childStartLine: number, sourceFile: SourceFileLike): boolean;
-        function childStartsOnTheSameLineWithElseInIfStatement(parent: Node, child: TextRangeWithKind, childStartLine: number, sourceFile: SourceFileLike): boolean;
-        function getContainingList(node: Node, sourceFile: SourceFile): NodeArray<Node> | undefined;
-        /**
-         * Character is the actual index of the character since the beginning of the line.
-         * Column - position of the character after expanding tabs to spaces.
-         * "0\t2$"
-         * value of 'character' for '$' is 3
-         * value of 'column' for '$' is 6 (assuming that tab size is 4)
-         */
-        function findFirstNonWhitespaceCharacterAndColumn(startPos: number, endPos: number, sourceFile: SourceFileLike, options: EditorSettings): {
-            column: number;
-            character: number;
-        };
-        function findFirstNonWhitespaceColumn(startPos: number, endPos: number, sourceFile: SourceFileLike, options: EditorSettings): number;
-        function nodeWillIndentChild(settings: FormatCodeSettings, parent: TextRangeWithKind, child: TextRangeWithKind | undefined, sourceFile: SourceFileLike | undefined, indentByDefault: boolean): boolean;
-        /**
-         * True when the parent node should indent the given child by an explicit rule.
-         * @param isNextChild If true, we are judging indent of a hypothetical child *after* this one, not the current child.
-         */
-        function shouldIndentChildNode(settings: FormatCodeSettings, parent: TextRangeWithKind, child?: Node, sourceFile?: SourceFileLike, isNextChild?: boolean): boolean;
-    }
-}
-declare namespace ts.textChanges {
-    interface ConfigurableStart {
-        /** True to use getStart() (NB, not getFullStart()) without adjustment. */
-        useNonAdjustedStartPosition?: boolean;
-    }
-    interface ConfigurableEnd {
-        /** True to use getEnd() without adjustment. */
-        useNonAdjustedEndPosition?: boolean;
-    }
-    enum Position {
-        FullStart = 0,
-        Start = 1
-    }
-    /**
-     * Usually node.pos points to a position immediately after the previous token.
-     * If this position is used as a beginning of the span to remove - it might lead to removing the trailing trivia of the previous node, i.e:
-     * const x; // this is x
-     *        ^ - pos for the next variable declaration will point here
-     * const y; // this is y
-     *        ^ - end for previous variable declaration
-     * Usually leading trivia of the variable declaration 'y' should not include trailing trivia (whitespace, comment 'this is x' and newline) from the preceding
-     * variable declaration and trailing trivia for 'y' should include (whitespace, comment 'this is y', newline).
-     * By default when removing nodes we adjust start and end positions to respect specification of the trivia above.
-     * If pos\end should be interpreted literally 'useNonAdjustedStartPosition' or 'useNonAdjustedEndPosition' should be set to true
-     */
-    interface ConfigurableStartEnd extends ConfigurableStart, ConfigurableEnd {
-    }
-    const useNonAdjustedPositions: ConfigurableStartEnd;
-    interface InsertNodeOptions {
-        /**
-         * Text to be inserted before the new node
-         */
-        prefix?: string;
-        /**
-         * Text to be inserted after the new node
-         */
-        suffix?: string;
-        /**
-         * Text of inserted node will be formatted with this indentation, otherwise indentation will be inferred from the old node
-         */
-        indentation?: number;
-        /**
-         * Text of inserted node will be formatted with this delta, otherwise delta will be inferred from the new node kind
-         */
-        delta?: number;
-        /**
-         * Do not trim leading white spaces in the edit range
-         */
-        preserveLeadingWhitespace?: boolean;
-    }
-    interface ReplaceWithMultipleNodesOptions extends InsertNodeOptions {
-        readonly joiner?: string;
-    }
-    interface ChangeNodeOptions extends ConfigurableStartEnd, InsertNodeOptions {
-    }
-    interface TextChangesContext {
-        host: LanguageServiceHost;
-        formatContext: formatting.FormatContext;
-    }
-    type TypeAnnotatable = SignatureDeclaration | VariableDeclaration | ParameterDeclaration | PropertyDeclaration | PropertySignature;
-    class ChangeTracker {
-        private readonly newLineCharacter;
-        private readonly formatContext;
-        private readonly changes;
-        private readonly newFiles;
-        private readonly deletedNodesInLists;
-        private readonly classesWithNodesInsertedAtStart;
-        static fromContext(context: TextChangesContext): ChangeTracker;
-        static with(context: TextChangesContext, cb: (tracker: ChangeTracker) => void): FileTextChanges[];
-        /** Public for tests only. Other callers should use `ChangeTracker.with`. */
-        constructor(newLineCharacter: string, formatContext: formatting.FormatContext);
-        deleteRange(sourceFile: SourceFile, range: TextRange): this;
-        /** Warning: This deletes comments too. See `copyComments` in `convertFunctionToEs6Class`. */
-        deleteNode(sourceFile: SourceFile, node: Node, options?: ConfigurableStartEnd): this;
-        deleteNodeRange(sourceFile: SourceFile, startNode: Node, endNode: Node, options?: ConfigurableStartEnd): this;
-        deleteNodeRangeExcludingEnd(sourceFile: SourceFile, startNode: Node, afterEndNode: Node | undefined, options?: ConfigurableStartEnd): void;
-        deleteNodeInList(sourceFile: SourceFile, node: Node): this;
-        replaceRange(sourceFile: SourceFile, range: TextRange, newNode: Node, options?: InsertNodeOptions): this;
-        replaceNode(sourceFile: SourceFile, oldNode: Node, newNode: Node, options?: ChangeNodeOptions): this;
-        replaceNodeRange(sourceFile: SourceFile, startNode: Node, endNode: Node, newNode: Node, options?: ChangeNodeOptions): void;
-        private replaceRangeWithNodes;
-        replaceNodeWithNodes(sourceFile: SourceFile, oldNode: Node, newNodes: ReadonlyArray<Node>, options?: ChangeNodeOptions): this;
-        replaceNodeRangeWithNodes(sourceFile: SourceFile, startNode: Node, endNode: Node, newNodes: ReadonlyArray<Node>, options?: ReplaceWithMultipleNodesOptions & ConfigurableStartEnd): this;
-        private nextCommaToken;
-        replacePropertyAssignment(sourceFile: SourceFile, oldNode: PropertyAssignment, newNode: PropertyAssignment): this;
-        private insertNodeAt;
-        private insertNodesAt;
-        insertNodeAtTopOfFile(sourceFile: SourceFile, newNode: Statement, blankLineBetween: boolean): void;
-        insertNodeBefore(sourceFile: SourceFile, before: Node, newNode: Node, blankLineBetween?: boolean): void;
-        insertModifierBefore(sourceFile: SourceFile, modifier: SyntaxKind, before: Node): void;
-        insertCommentBeforeLine(sourceFile: SourceFile, lineNumber: number, position: number, commentText: string): void;
-        replaceRangeWithText(sourceFile: SourceFile, range: TextRange, text: string): void;
-        private insertText;
-        /** Prefer this over replacing a node with another that has a type annotation, as it avoids reformatting the other parts of the node. */
-        tryInsertTypeAnnotation(sourceFile: SourceFile, node: TypeAnnotatable, type: TypeNode): void;
-        insertTypeParameters(sourceFile: SourceFile, node: SignatureDeclaration, typeParameters: ReadonlyArray<TypeParameterDeclaration>): void;
-        private getOptionsForInsertNodeBefore;
-        insertNodeAtConstructorStart(sourceFile: SourceFile, ctr: ConstructorDeclaration, newStatement: Statement): void;
-        insertNodeAtConstructorEnd(sourceFile: SourceFile, ctr: ConstructorDeclaration, newStatement: Statement): void;
-        private replaceConstructorBody;
-        insertNodeAtEndOfScope(sourceFile: SourceFile, scope: Node, newNode: Node): void;
-        insertNodeAtClassStart(sourceFile: SourceFile, cls: ClassLikeDeclaration, newElement: ClassElement): void;
-        private getInsertNodeAtClassStartPrefixSuffix;
-        insertNodeAfterComma(sourceFile: SourceFile, after: Node, newNode: Node): void;
-        insertNodeAfter(sourceFile: SourceFile, after: Node, newNode: Node): void;
-        insertNodesAfter(sourceFile: SourceFile, after: Node, newNodes: ReadonlyArray<Node>): void;
-        private insertNodeAfterWorker;
-        private getInsertNodeAfterOptions;
-        private getInsertNodeAfterOptionsWorker;
-        insertName(sourceFile: SourceFile, node: FunctionExpression | ClassExpression | ArrowFunction, name: string): void;
-        insertExportModifier(sourceFile: SourceFile, node: DeclarationStatement | VariableStatement): void;
-        /**
-         * This function should be used to insert nodes in lists when nodes don't carry separators as the part of the node range,
-         * i.e. arguments in arguments lists, parameters in parameter lists etc.
-         * Note that separators are part of the node in statements and class elements.
-         */
-        insertNodeInListAfter(sourceFile: SourceFile, after: Node, newNode: Node, containingList?: NodeArray<Node> | undefined): this;
-        private finishClassesWithNodesInsertedAtStart;
-        private finishTrailingCommaAfterDeletingNodesInList;
-        /**
-         * Note: after calling this, the TextChanges object must be discarded!
-         * @param validate only for tests
-         *    The reason we must validate as part of this method is that `getNonFormattedText` changes the node's positions,
-         *    so we can only call this once and can't get the non-formatted text separately.
-         */
-        getChanges(validate?: ValidateNonFormattedText): FileTextChanges[];
-        createNewFile(oldFile: SourceFile, fileName: string, statements: ReadonlyArray<Statement>): void;
-    }
-    type ValidateNonFormattedText = (node: Node, text: string) => void;
-    function applyChanges(text: string, changes: TextChange[]): string;
-    function isValidLocationToAddComment(sourceFile: SourceFile, position: number): boolean;
-}
-declare namespace ts {
-    interface CodeFixRegistration {
-        errorCodes: number[];
-        getCodeActions(context: CodeFixContext): CodeFixAction[] | undefined;
-        fixIds?: string[];
-        getAllCodeActions?(context: CodeFixAllContext): CombinedCodeActions;
-    }
-    interface CodeFixContextBase extends textChanges.TextChangesContext {
-        sourceFile: SourceFile;
-        program: Program;
-        cancellationToken: CancellationToken;
-        preferences: UserPreferences;
-    }
-    interface CodeFixAllContext extends CodeFixContextBase {
-        fixId: {};
-    }
-    interface CodeFixContext extends CodeFixContextBase {
-        errorCode: number;
-        span: TextSpan;
-    }
-    namespace codefix {
-        type DiagnosticAndArguments = DiagnosticMessage | [DiagnosticMessage, string] | [DiagnosticMessage, string, string];
-        function createCodeFixActionNoFixId(fixName: string, changes: FileTextChanges[], description: DiagnosticAndArguments): CodeFixAction;
-        function createCodeFixAction(fixName: string, changes: FileTextChanges[], description: DiagnosticAndArguments, fixId: {}, fixAllDescription: DiagnosticAndArguments, command?: CodeActionCommand): CodeFixAction;
-        function registerCodeFix(reg: CodeFixRegistration): void;
-        function getSupportedErrorCodes(): string[];
-        function getFixes(context: CodeFixContext): CodeFixAction[];
-        function getAllFixes(context: CodeFixAllContext): CombinedCodeActions;
-        function createFileTextChanges(fileName: string, textChanges: TextChange[]): FileTextChanges;
-        function codeFixAll(context: CodeFixAllContext, errorCodes: number[], use: (changes: textChanges.ChangeTracker, error: DiagnosticWithLocation, commands: Push<CodeActionCommand>) => void): CombinedCodeActions;
-    }
-}
-declare namespace ts {
-    interface Refactor {
-        /** Compute the associated code actions */
-        getEditsForAction(context: RefactorContext, actionName: string): RefactorEditInfo | undefined;
-        /** Compute (quickly) which actions are available here */
-        getAvailableActions(context: RefactorContext): ApplicableRefactorInfo[] | undefined;
-    }
-    interface RefactorContext extends textChanges.TextChangesContext {
-        file: SourceFile;
-        startPosition: number;
-        endPosition?: number;
-        program: Program;
-        cancellationToken?: CancellationToken;
-        preferences: UserPreferences;
-    }
-    namespace refactor {
-        /** @param name An unique code associated with each refactor. Does not have to be human-readable. */
-        function registerRefactor(name: string, refactor: Refactor): void;
-        function getApplicableRefactors(context: RefactorContext): ApplicableRefactorInfo[];
-        function getEditsForRefactor(context: RefactorContext, refactorName: string, actionName: string): RefactorEditInfo | undefined;
-    }
-    function getRefactorContextSpan({ startPosition, endPosition }: RefactorContext): TextSpan;
-}
-declare namespace ts.codefix {
-}
-declare namespace ts.codefix {
-    type DeclarationWithType = FunctionLikeDeclaration | VariableDeclaration | PropertySignature | PropertyDeclaration;
-    function parameterShouldGetTypeFromJSDoc(node: Node): node is DeclarationWithType;
-}
-declare namespace ts.codefix {
-}
-declare namespace ts.codefix {
-}
-declare namespace ts.codefix {
-}
-declare namespace ts.codefix {
-}
-declare namespace ts.codefix {
-    function getImportCompletionAction(exportedSymbol: Symbol, moduleSymbol: Symbol, sourceFile: SourceFile, symbolName: string, host: LanguageServiceHost, program: Program, checker: TypeChecker, compilerOptions: CompilerOptions, allSourceFiles: ReadonlyArray<SourceFile>, formatContext: formatting.FormatContext, getCanonicalFileName: GetCanonicalFileName, symbolToken: Node | undefined, preferences: UserPreferences): {
-        readonly moduleSpecifier: string;
-        readonly codeAction: CodeAction;
-    };
-    function forEachExternalModuleToImportFrom(checker: TypeChecker, from: SourceFile, allSourceFiles: ReadonlyArray<SourceFile>, cb: (module: Symbol) => void): void;
-    function moduleSymbolToValidIdentifier(moduleSymbol: Symbol, target: ScriptTarget): string;
-    function moduleSpecifierToValidIdentifier(moduleSpecifier: string, target: ScriptTarget): string;
-}
-declare namespace ts.codefix {
-}
-declare namespace ts.codefix {
-}
-declare namespace ts.codefix {
-}
-declare namespace ts.codefix {
-}
-declare namespace ts.codefix {
-}
-declare namespace ts.codefix {
-}
-declare namespace ts.codefix {
-}
-declare namespace ts.codefix {
-}
-declare namespace ts.codefix {
-}
-declare namespace ts.codefix {
-}
-declare namespace ts.codefix {
-}
-declare namespace ts.codefix {
-}
-declare namespace ts.codefix {
-}
-declare namespace ts.codefix {
-}
-declare namespace ts.codefix {
-    /**
-     * Finds members of the resolved type that are missing in the class pointed to by class decl
-     * and generates source code for the missing members.
-     * @param possiblyMissingSymbols The collection of symbols to filter and then get insertions for.
-     * @returns Empty string iff there are no member insertions.
-     */
-    function createMissingMemberNodes(classDeclaration: ClassLikeDeclaration, possiblyMissingSymbols: ReadonlyArray<Symbol>, checker: TypeChecker, preferences: UserPreferences, out: (node: ClassElement) => void): void;
-    function createMethodFromCallExpression({ typeArguments, arguments: args, parent: parent }: CallExpression, methodName: string, inJs: boolean, makeStatic: boolean, preferences: UserPreferences): MethodDeclaration;
-}
-declare namespace ts.codefix {
-}
-declare namespace ts.codefix {
-}
-declare namespace ts.codefix {
-}
-declare namespace ts.codefix {
-}
-declare namespace ts.codefix {
-}
-declare namespace ts.codefix {
-}
-declare namespace ts.codefix {
-}
-declare namespace ts.refactor.generateGetAccessorAndSetAccessor {
-}
-declare namespace ts.refactor.extractSymbol {
-    /**
-     * Compute the associated code actions
-     * Exported for tests.
-     */
-    function getAvailableActions(context: RefactorContext): ApplicableRefactorInfo[] | undefined;
-    function getEditsForAction(context: RefactorContext, actionName: string): RefactorEditInfo | undefined;
-    namespace Messages {
-        const cannotExtractRange: DiagnosticMessage;
-        const cannotExtractImport: DiagnosticMessage;
-        const cannotExtractSuper: DiagnosticMessage;
-        const cannotExtractEmpty: DiagnosticMessage;
-        const expressionExpected: DiagnosticMessage;
-        const uselessConstantType: DiagnosticMessage;
-        const statementOrExpressionExpected: DiagnosticMessage;
-        const cannotExtractRangeContainingConditionalBreakOrContinueStatements: DiagnosticMessage;
-        const cannotExtractRangeContainingConditionalReturnStatement: DiagnosticMessage;
-        const cannotExtractRangeContainingLabeledBreakOrContinueStatementWithTargetOutsideOfTheRange: DiagnosticMessage;
-        const cannotExtractRangeThatContainsWritesToReferencesLocatedOutsideOfTheTargetRangeInGenerators: DiagnosticMessage;
-        const typeWillNotBeVisibleInTheNewScope: DiagnosticMessage;
-        const functionWillNotBeVisibleInTheNewScope: DiagnosticMessage;
-        const cannotExtractIdentifier: DiagnosticMessage;
-        const cannotExtractExportedEntity: DiagnosticMessage;
-        const cannotWriteInExpression: DiagnosticMessage;
-        const cannotExtractReadonlyPropertyInitializerOutsideConstructor: DiagnosticMessage;
-        const cannotExtractAmbientBlock: DiagnosticMessage;
-        const cannotAccessVariablesFromNestedScopes: DiagnosticMessage;
-        const cannotExtractToOtherFunctionLike: DiagnosticMessage;
-        const cannotExtractToJSClass: DiagnosticMessage;
-        const cannotExtractToExpressionArrowFunction: DiagnosticMessage;
-    }
-    enum RangeFacts {
-        None = 0,
-        HasReturn = 1,
-        IsGenerator = 2,
-        IsAsyncFunction = 4,
-        UsesThis = 8,
-        /**
-         * The range is in a function which needs the 'static' modifier in a class
-         */
-        InStaticRegion = 16
-    }
-    /**
-     * Represents an expression or a list of statements that should be extracted with some extra information
-     */
-    interface TargetRange {
-        readonly range: Expression | Statement[];
-        readonly facts: RangeFacts;
-        /**
-         * A list of symbols that are declared in the selected range which are visible in the containing lexical scope
-         * Used to ensure we don't turn something used outside the range free (or worse, resolve to a different entity).
-         */
-        readonly declarations: Symbol[];
-    }
-    /**
-     * Result of 'getRangeToExtract' operation: contains either a range or a list of errors
-     */
-    type RangeToExtract = {
-        readonly targetRange?: never;
-        readonly errors: ReadonlyArray<Diagnostic>;
-    } | {
-        readonly targetRange: TargetRange;
-        readonly errors?: never;
-    };
-    /**
-     * getRangeToExtract takes a span inside a text file and returns either an expression or an array
-     * of statements representing the minimum set of nodes needed to extract the entire span. This
-     * process may fail, in which case a set of errors is returned instead (these are currently
-     * not shown to the user, but can be used by us diagnostically)
-     */
-    function getRangeToExtract(sourceFile: SourceFile, span: TextSpan): RangeToExtract;
-}
-declare namespace ts.refactor.generateGetAccessorAndSetAccessor {
-}
-declare namespace ts.refactor {
-}
-declare namespace ts.refactor.addOrRemoveBracesToArrowFunction {
-}
-declare namespace ts.sourcemaps {
-    interface SourceMapData {
-        version?: number;
-        file?: string;
-        sourceRoot?: string;
-        sources: string[];
-        sourcesContent?: string[];
-        names?: string[];
-        mappings: string;
-    }
-    interface SourceMappableLocation {
-        fileName: string;
-        position: number;
-    }
-    interface SourceMapper {
-        getOriginalPosition(input: SourceMappableLocation): SourceMappableLocation;
-        getGeneratedPosition(input: SourceMappableLocation): SourceMappableLocation;
-    }
-    const identitySourceMapper: {
-        getOriginalPosition: typeof identity;
-        getGeneratedPosition: typeof identity;
-    };
-    interface SourceMapDecodeHost {
-        readFile(path: string): string | undefined;
-        fileExists(path: string): boolean;
-        getCanonicalFileName(path: string): string;
-        log(text: string): void;
-    }
-    function decode(host: SourceMapDecodeHost, mapPath: string, map: SourceMapData, program?: Program, fallbackCache?: SourceFileLikeCache): SourceMapper;
 }
 declare namespace ts {
     /** The version of the language service API */
     const servicesVersion = "0.8";
-    interface DisplayPartsSymbolWriter extends EmitTextWriter {
-        displayParts(): SymbolDisplayPart[];
-    }
-    function toEditorSettings(options: FormatCodeOptions | FormatCodeSettings): FormatCodeSettings;
     function toEditorSettings(options: EditorOptions | EditorSettings): EditorSettings;
     function displayPartsToString(displayParts: SymbolDisplayPart[] | undefined): string;
     function getDefaultCompilerOptions(): CompilerOptions;
@@ -11716,31 +5533,7 @@ declare namespace ts {
     function createLanguageServiceSourceFile(fileName: string, scriptSnapshot: IScriptSnapshot, scriptTarget: ScriptTarget, version: string, setNodeParents: boolean, scriptKind?: ScriptKind): SourceFile;
     let disableIncrementalParsing: boolean;
     function updateLanguageServiceSourceFile(sourceFile: SourceFile, scriptSnapshot: IScriptSnapshot, version: string, textChangeRange: TextChangeRange | undefined, aggressiveChecks?: boolean): SourceFile;
-    /** A cancellation that throttles calls to the host */
-    class ThrottledCancellationToken implements CancellationToken {
-        private hostCancellationToken;
-        private readonly throttleWaitMilliseconds;
-        private lastCancellationCheckTime;
-        constructor(hostCancellationToken: HostCancellationToken, throttleWaitMilliseconds?: number);
-        isCancellationRequested(): boolean;
-        throwIfCancellationRequested(): void;
-    }
-    interface SourceFileLikeCache {
-        get(path: Path): SourceFileLike | undefined;
-    }
-    function createSourceFileLikeCache(host: {
-        readFile?: (path: string) => string | undefined;
-        fileExists?: (path: string) => boolean;
-    }): SourceFileLikeCache;
     function createLanguageService(host: LanguageServiceHost, documentRegistry?: DocumentRegistry, syntaxOnly?: boolean): LanguageService;
-    /** Names in the name table are escaped, so an identifier `__foo` will have a name table entry `___foo`. */
-    function getNameTable(sourceFile: SourceFile): UnderscoreEscapedMap<number>;
-    /**
-     * Returns the containing object literal property declaration given a possible name node, e.g. "a" in x = { "a": 1 }
-     */
-    function getContainingObjectLiteralElement(node: Node): ObjectLiteralElement | undefined;
-    function getPropertySymbolsFromContextualType(typeChecker: TypeChecker, node: ObjectLiteralElement): Symbol[];
-    function getPropertySymbolsFromType(type: Type, propName: PropertyName): Symbol[] | undefined;
     /**
      * Get the path of the default library files (lib.d.ts) as distributed with the typescript
      * node package.
@@ -11748,12 +5541,6 @@ declare namespace ts {
      */
     function getDefaultLibFilePath(options: CompilerOptions): string;
 }
-declare namespace ts.BreakpointResolver {
-    /**
-     * Get the breakpoint span in given sourceFile
-     */
-    function spanInSourceFileAtLocation(sourceFile: SourceFile, position: number): TextSpan | undefined;
-}
 declare namespace ts {
     /**
      * Transform one or more nodes using the supplied transformers.
@@ -11763,277 +5550,5 @@ declare namespace ts {
      */
     function transform<T extends Node>(source: T | T[], transformers: TransformerFactory<T>[], compilerOptions?: CompilerOptions): TransformationResult<T>;
 }
-declare let debugObjectHost: {
-    CollectGarbage(): void;
-};
-declare namespace ts {
-    interface ScriptSnapshotShim {
-        /** Gets a portion of the script snapshot specified by [start, end). */
-        getText(start: number, end: number): string;
-        /** Gets the length of this script snapshot. */
-        getLength(): number;
-        /**
-         * Returns a JSON-encoded value of the type:
-         *   { span: { start: number; length: number }; newLength: number }
-         *
-         * Or undefined value if there was no change.
-         */
-        getChangeRange(oldSnapshot: ScriptSnapshotShim): string | undefined;
-        /** Releases all resources held by this script snapshot */
-        dispose?(): void;
-    }
-    interface Logger {
-        log(s: string): void;
-        trace(s: string): void;
-        error(s: string): void;
-    }
-    /** Public interface of the host of a language service shim instance. */
-    interface LanguageServiceShimHost extends Logger {
-        getCompilationSettings(): string;
-        /** Returns a JSON-encoded value of the type: string[] */
-        getScriptFileNames(): string;
-        getScriptKind?(fileName: string): ScriptKind;
-        getScriptVersion(fileName: string): string;
-        getScriptSnapshot(fileName: string): ScriptSnapshotShim;
-        getLocalizedDiagnosticMessages(): string;
-        getCancellationToken(): HostCancellationToken;
-        getCurrentDirectory(): string;
-        getDirectories(path: string): string;
-        getDefaultLibFileName(options: string): string;
-        getNewLine?(): string;
-        getProjectVersion?(): string;
-        useCaseSensitiveFileNames?(): boolean;
-        getTypeRootsVersion?(): number;
-        readDirectory(rootDir: string, extension: string, basePaths?: string, excludeEx?: string, includeFileEx?: string, includeDirEx?: string, depth?: number): string;
-        readFile(path: string, encoding?: string): string | undefined;
-        fileExists(path: string): boolean;
-        getModuleResolutionsForFile?(fileName: string): string;
-        getTypeReferenceDirectiveResolutionsForFile?(fileName: string): string;
-        directoryExists(directoryName: string): boolean;
-    }
-    /** Public interface of the core-services host instance used in managed side */
-    interface CoreServicesShimHost extends Logger {
-        directoryExists(directoryName: string): boolean;
-        fileExists(fileName: string): boolean;
-        getCurrentDirectory(): string;
-        getDirectories(path: string): string;
-        /**
-         * Returns a JSON-encoded value of the type: string[]
-         *
-         * @param exclude A JSON encoded string[] containing the paths to exclude
-         *  when enumerating the directory.
-         */
-        readDirectory(rootDir: string, extension: string, basePaths?: string, excludeEx?: string, includeFileEx?: string, includeDirEx?: string, depth?: number): string;
-        /**
-         * Read arbitary text files on disk, i.e. when resolution procedure needs the content of 'package.json' to determine location of bundled typings for node modules
-         */
-        readFile(fileName: string): string | undefined;
-        realpath?(path: string): string;
-        trace(s: string): void;
-        useCaseSensitiveFileNames?(): boolean;
-    }
-    interface ShimsFileReference {
-        path: string;
-        position: number;
-        length: number;
-    }
-    /** Public interface of a language service instance shim. */
-    interface ShimFactory {
-        registerShim(shim: Shim): void;
-        unregisterShim(shim: Shim): void;
-    }
-    interface Shim {
-        dispose(_dummy: {}): void;
-    }
-    interface LanguageServiceShim extends Shim {
-        languageService: LanguageService;
-        dispose(_dummy: {}): void;
-        refresh(throwOnError: boolean): void;
-        cleanupSemanticCache(): void;
-        getSyntacticDiagnostics(fileName: string): string;
-        getSemanticDiagnostics(fileName: string): string;
-        getSuggestionDiagnostics(fileName: string): string;
-        getCompilerOptionsDiagnostics(): string;
-        getSyntacticClassifications(fileName: string, start: number, length: number): string;
-        getSemanticClassifications(fileName: string, start: number, length: number): string;
-        getEncodedSyntacticClassifications(fileName: string, start: number, length: number): string;
-        getEncodedSemanticClassifications(fileName: string, start: number, length: number): string;
-        getCompletionsAtPosition(fileName: string, position: number, preferences: UserPreferences | undefined): string;
-        getCompletionEntryDetails(fileName: string, position: number, entryName: string, formatOptions: string | undefined, source: string | undefined, preferences: UserPreferences | undefined): string;
-        getQuickInfoAtPosition(fileName: string, position: number): string;
-        getNameOrDottedNameSpan(fileName: string, startPos: number, endPos: number): string;
-        getBreakpointStatementAtPosition(fileName: string, position: number): string;
-        getSignatureHelpItems(fileName: string, position: number): string;
-        /**
-         * Returns a JSON-encoded value of the type:
-         * { canRename: boolean, localizedErrorMessage: string, displayName: string, fullDisplayName: string, kind: string, kindModifiers: string, triggerSpan: { start; length } }
-         */
-        getRenameInfo(fileName: string, position: number): string;
-        /**
-         * Returns a JSON-encoded value of the type:
-         * { fileName: string, textSpan: { start: number, length: number } }[]
-         */
-        findRenameLocations(fileName: string, position: number, findInStrings: boolean, findInComments: boolean): string;
-        /**
-         * Returns a JSON-encoded value of the type:
-         * { fileName: string; textSpan: { start: number; length: number}; kind: string; name: string; containerKind: string; containerName: string }
-         *
-         * Or undefined value if no definition can be found.
-         */
-        getDefinitionAtPosition(fileName: string, position: number): string;
-        getDefinitionAndBoundSpan(fileName: string, position: number): string;
-        /**
-         * Returns a JSON-encoded value of the type:
-         * { fileName: string; textSpan: { start: number; length: number}; kind: string; name: string; containerKind: string; containerName: string }
-         *
-         * Or undefined value if no definition can be found.
-         */
-        getTypeDefinitionAtPosition(fileName: string, position: number): string;
-        /**
-         * Returns a JSON-encoded value of the type:
-         * { fileName: string; textSpan: { start: number; length: number}; }[]
-         */
-        getImplementationAtPosition(fileName: string, position: number): string;
-        /**
-         * Returns a JSON-encoded value of the type:
-         * { fileName: string; textSpan: { start: number; length: number}; isWriteAccess: boolean, isDefinition?: boolean }[]
-         */
-        getReferencesAtPosition(fileName: string, position: number): string;
-        /**
-         * Returns a JSON-encoded value of the type:
-         * { definition: <encoded>; references: <encoded>[] }[]
-         */
-        findReferences(fileName: string, position: number): string;
-        /**
-         * @deprecated
-         * Returns a JSON-encoded value of the type:
-         * { fileName: string; textSpan: { start: number; length: number}; isWriteAccess: boolean }[]
-         */
-        getOccurrencesAtPosition(fileName: string, position: number): string;
-        /**
-         * Returns a JSON-encoded value of the type:
-         * { fileName: string; highlights: { start: number; length: number, isDefinition: boolean }[] }[]
-         *
-         * @param fileToSearch A JSON encoded string[] containing the file names that should be
-         *  considered when searching.
-         */
-        getDocumentHighlights(fileName: string, position: number, filesToSearch: string): string;
-        /**
-         * Returns a JSON-encoded value of the type:
-         * { name: string; kind: string; kindModifiers: string; containerName: string; containerKind: string; matchKind: string; fileName: string; textSpan: { start: number; length: number}; } [] = [];
-         */
-        getNavigateToItems(searchValue: string, maxResultCount?: number, fileName?: string): string;
-        /**
-         * Returns a JSON-encoded value of the type:
-         * { text: string; kind: string; kindModifiers: string; bolded: boolean; grayed: boolean; indent: number; spans: { start: number; length: number; }[]; childItems: <recursive use of this type>[] } [] = [];
-         */
-        getNavigationBarItems(fileName: string): string;
-        /** Returns a JSON-encoded value of the type ts.NavigationTree. */
-        getNavigationTree(fileName: string): string;
-        /**
-         * Returns a JSON-encoded value of the type:
-         * { textSpan: { start: number, length: number }; hintSpan: { start: number, length: number }; bannerText: string; autoCollapse: boolean } [] = [];
-         */
-        getOutliningSpans(fileName: string): string;
-        getTodoComments(fileName: string, todoCommentDescriptors: string): string;
-        getBraceMatchingAtPosition(fileName: string, position: number): string;
-        getIndentationAtPosition(fileName: string, position: number, options: string): string;
-        getFormattingEditsForRange(fileName: string, start: number, end: number, options: string): string;
-        getFormattingEditsForDocument(fileName: string, options: string): string;
-        getFormattingEditsAfterKeystroke(fileName: string, position: number, key: string, options: string): string;
-        /**
-         * Returns JSON-encoded value of the type TextInsertion.
-         */
-        getDocCommentTemplateAtPosition(fileName: string, position: number): string;
-        /**
-         * Returns JSON-encoded boolean to indicate whether we should support brace location
-         * at the current position.
-         * E.g. we don't want brace completion inside string-literals, comments, etc.
-         */
-        isValidBraceCompletionAtPosition(fileName: string, position: number, openingBrace: number): string;
-        /**
-         * Returns a JSON-encoded TextSpan | undefined indicating the range of the enclosing comment, if it exists.
-         */
-        getSpanOfEnclosingComment(fileName: string, position: number, onlyMultiLine: boolean): string;
-        getEmitOutput(fileName: string): string;
-        getEmitOutputObject(fileName: string): EmitOutput;
-    }
-    interface ClassifierShim extends Shim {
-        getEncodedLexicalClassifications(text: string, lexState: EndOfLineState, syntacticClassifierAbsent?: boolean): string;
-        getClassificationsForLine(text: string, lexState: EndOfLineState, syntacticClassifierAbsent?: boolean): string;
-    }
-    interface CoreServicesShim extends Shim {
-        getAutomaticTypeDirectiveNames(compilerOptionsJson: string): string;
-        getPreProcessedFileInfo(fileName: string, sourceText: IScriptSnapshot): string;
-        getTSConfigFileInfo(fileName: string, sourceText: IScriptSnapshot): string;
-        getDefaultCompilationSettings(): string;
-        discoverTypings(discoverTypingsJson: string): string;
-    }
-    class LanguageServiceShimHostAdapter implements LanguageServiceHost {
-        private shimHost;
-        private files;
-        private loggingEnabled;
-        private tracingEnabled;
-        resolveModuleNames: (moduleName: string[], containingFile: string) => ResolvedModuleFull[];
-        resolveTypeReferenceDirectives: (typeDirectiveNames: string[], containingFile: string) => ResolvedTypeReferenceDirective[];
-        directoryExists: (directoryName: string) => boolean;
-        constructor(shimHost: LanguageServiceShimHost);
-        log(s: string): void;
-        trace(s: string): void;
-        error(s: string): void;
-        getProjectVersion(): string;
-        getTypeRootsVersion(): number;
-        useCaseSensitiveFileNames(): boolean;
-        getCompilationSettings(): CompilerOptions;
-        getScriptFileNames(): string[];
-        getScriptSnapshot(fileName: string): IScriptSnapshot | undefined;
-        getScriptKind(fileName: string): ScriptKind;
-        getScriptVersion(fileName: string): string;
-        getLocalizedDiagnosticMessages(): any;
-        getCancellationToken(): HostCancellationToken;
-        getCurrentDirectory(): string;
-        getDirectories(path: string): string[];
-        getDefaultLibFileName(options: CompilerOptions): string;
-        readDirectory(path: string, extensions?: ReadonlyArray<string>, exclude?: string[], include?: string[], depth?: number): string[];
-        readFile(path: string, encoding?: string): string | undefined;
-        fileExists(path: string): boolean;
-    }
-    class CoreServicesShimHostAdapter implements ParseConfigHost, ModuleResolutionHost, JsTyping.TypingResolutionHost {
-        private shimHost;
-        directoryExists: (directoryName: string) => boolean;
-        realpath: (path: string) => string;
-        useCaseSensitiveFileNames: boolean;
-        constructor(shimHost: CoreServicesShimHost);
-        readDirectory(rootDir: string, extensions: ReadonlyArray<string>, exclude: ReadonlyArray<string>, include: ReadonlyArray<string>, depth?: number): string[];
-        fileExists(fileName: string): boolean;
-        readFile(fileName: string): string | undefined;
-        getDirectories(path: string): string[];
-    }
-    interface RealizedDiagnostic {
-        message: string;
-        start: number;
-        length: number;
-        category: string;
-        code: number;
-        reportsUnnecessary?: {};
-    }
-    function realizeDiagnostics(diagnostics: ReadonlyArray<Diagnostic>, newLine: string): RealizedDiagnostic[];
-    class TypeScriptServicesFactory implements ShimFactory {
-        private _shims;
-        private documentRegistry;
-        getServicesVersion(): string;
-        createLanguageServiceShim(host: LanguageServiceShimHost): LanguageServiceShim;
-        createClassifierShim(logger: Logger): ClassifierShim;
-        createCoreServicesShim(host: CoreServicesShimHost): CoreServicesShim;
-        close(): void;
-        registerShim(shim: Shim): void;
-        unregisterShim(shim: Shim): void;
-    }
-}
-declare namespace TypeScript.Services {
-    const TypeScriptServicesFactory: typeof ts.TypeScriptServicesFactory;
-}
-declare const toolsVersion = "3.0";
-//# sourceMappingURL=services.d.ts.map
 //# sourceMappingURL=typescriptServices.d.ts.map
-export = ts;
\ No newline at end of file
+export = ts
\ No newline at end of file
diff --git a/tests/baselines/reference/chainedPrototypeAssignment.types b/tests/baselines/reference/chainedPrototypeAssignment.types
index a893ae63022c6..f0d9cc972ef0f 100644
--- a/tests/baselines/reference/chainedPrototypeAssignment.types
+++ b/tests/baselines/reference/chainedPrototypeAssignment.types
@@ -86,9 +86,9 @@ A.prototype = B.prototype = {
 >A : typeof A
 >prototype : { [x: string]: any; m(n: number): number; }
 >B.prototype = {    /** @param {number} n */    m(n) {        return n + 1    }} : { [x: string]: any; m(n: number): number; }
->B.prototype : { [x: string]: any; m(n: number): number; }
+>B.prototype : { [x: string]: any; }
 >B : typeof B
->prototype : { [x: string]: any; m(n: number): number; }
+>prototype : { [x: string]: any; }
 >{    /** @param {number} n */    m(n) {        return n + 1    }} : { [x: string]: any; m(n: number): number; }
 
     /** @param {number} n */
diff --git a/tests/baselines/reference/checkJsdocTypeTag4.errors.txt b/tests/baselines/reference/checkJsdocTypeTag4.errors.txt
new file mode 100644
index 0000000000000..4683f25609350
--- /dev/null
+++ b/tests/baselines/reference/checkJsdocTypeTag4.errors.txt
@@ -0,0 +1,21 @@
+tests/cases/conformance/jsdoc/test.js(5,14): error TS2344: Type 'number' does not satisfy the constraint 'string'.
+tests/cases/conformance/jsdoc/test.js(7,14): error TS2344: Type 'number' does not satisfy the constraint 'string'.
+
+
+==== tests/cases/conformance/jsdoc/t.d.ts (0 errors) ====
+    type A<T extends string> = { a: T }
+    
+==== tests/cases/conformance/jsdoc/test.js (2 errors) ====
+    /** Also should error for jsdoc typedefs
+     * @template {string} U
+     * @typedef {{ b: U }} B
+     */
+    /** @type {A<number>} */
+                 ~~~~~~
+!!! error TS2344: Type 'number' does not satisfy the constraint 'string'.
+    var a;
+    /** @type {B<number>} */
+                 ~~~~~~
+!!! error TS2344: Type 'number' does not satisfy the constraint 'string'.
+    var b;
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/checkJsdocTypeTag4.symbols b/tests/baselines/reference/checkJsdocTypeTag4.symbols
new file mode 100644
index 0000000000000..50e70ad394403
--- /dev/null
+++ b/tests/baselines/reference/checkJsdocTypeTag4.symbols
@@ -0,0 +1,20 @@
+=== tests/cases/conformance/jsdoc/t.d.ts ===
+type A<T extends string> = { a: T }
+>A : Symbol(A, Decl(t.d.ts, 0, 0))
+>T : Symbol(T, Decl(t.d.ts, 0, 7))
+>a : Symbol(a, Decl(t.d.ts, 0, 28))
+>T : Symbol(T, Decl(t.d.ts, 0, 7))
+
+=== tests/cases/conformance/jsdoc/test.js ===
+/** Also should error for jsdoc typedefs
+ * @template {string} U
+ * @typedef {{ b: U }} B
+ */
+/** @type {A<number>} */
+var a;
+>a : Symbol(a, Decl(test.js, 5, 3))
+
+/** @type {B<number>} */
+var b;
+>b : Symbol(b, Decl(test.js, 7, 3))
+
diff --git a/tests/baselines/reference/checkJsdocTypeTag4.types b/tests/baselines/reference/checkJsdocTypeTag4.types
new file mode 100644
index 0000000000000..04e3707a400c0
--- /dev/null
+++ b/tests/baselines/reference/checkJsdocTypeTag4.types
@@ -0,0 +1,20 @@
+=== tests/cases/conformance/jsdoc/t.d.ts ===
+type A<T extends string> = { a: T }
+>A : A<T>
+>T : T
+>a : T
+>T : T
+
+=== tests/cases/conformance/jsdoc/test.js ===
+/** Also should error for jsdoc typedefs
+ * @template {string} U
+ * @typedef {{ b: U }} B
+ */
+/** @type {A<number>} */
+var a;
+>a : A<number>
+
+/** @type {B<number>} */
+var b;
+>b : { b: number; }
+
diff --git a/tests/baselines/reference/commonSourceDirectory.js b/tests/baselines/reference/commonSourceDirectory.js
index ca705a5b34ed8..44991d1b84e73 100644
--- a/tests/baselines/reference/commonSourceDirectory.js
+++ b/tests/baselines/reference/commonSourceDirectory.js
@@ -24,7 +24,7 @@ exports.__esModule = true;
 var foo_1 = require("foo");
 var bar_1 = require("bar");
 foo_1.x + bar_1.y;
-//# sourceMappingURL=/app/myMapRoot/index.js.map
+//# sourceMappingURL=../myMapRoot/index.js.map
 
 //// [/app/bin/index.d.ts]
 /// <reference path="../../types/bar.d.ts" />
diff --git a/tests/baselines/reference/commonSourceDirectory.js.map b/tests/baselines/reference/commonSourceDirectory.js.map
index fd88719859b7a..737c1dc3df1e6 100644
--- a/tests/baselines/reference/commonSourceDirectory.js.map
+++ b/tests/baselines/reference/commonSourceDirectory.js.map
@@ -1,2 +1,2 @@
 //// [/app/bin/index.js.map]
-{"version":3,"file":"index.js","sourceRoot":"/app/mySourceRoot/","sources":["index.ts"],"names":[],"mappings":";;AAAA,yCAAyC;AACzC,2BAAwB;AACxB,2BAAwB;AACxB,OAAC,GAAG,OAAC,CAAC"}
\ No newline at end of file
+{"version":3,"file":"index.js","sourceRoot":"mySourceRoot/","sources":["index.ts"],"names":[],"mappings":";;AAAA,yCAAyC;AACzC,2BAAwB;AACxB,2BAAwB;AACxB,OAAC,GAAG,OAAC,CAAC"}
\ No newline at end of file
diff --git a/tests/baselines/reference/commonSourceDirectory.sourcemap.txt b/tests/baselines/reference/commonSourceDirectory.sourcemap.txt
index c880d2d0059fb..567e435ce555c 100644
--- a/tests/baselines/reference/commonSourceDirectory.sourcemap.txt
+++ b/tests/baselines/reference/commonSourceDirectory.sourcemap.txt
@@ -1,7 +1,7 @@
 ===================================================================
 JsFile: index.js
-mapUrl: /app/myMapRoot/index.js.map
-sourceRoot: /app/mySourceRoot/
+mapUrl: ../myMapRoot/index.js.map
+sourceRoot: mySourceRoot/
 sources: index.ts
 ===================================================================
 -------------------------------------------------------------------
@@ -43,7 +43,7 @@ sourceFile:index.ts
 3 >       ^^^
 4 >          ^^^^^^^
 5 >                 ^
-6 >                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^->
+6 >                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^->
 1 >
   >
 2 >x
@@ -56,4 +56,4 @@ sourceFile:index.ts
 4 >Emitted(6, 18) Source(4, 6) + SourceIndex(0)
 5 >Emitted(6, 19) Source(4, 7) + SourceIndex(0)
 ---
->>>//# sourceMappingURL=/app/myMapRoot/index.js.map
\ No newline at end of file
+>>>//# sourceMappingURL=../myMapRoot/index.js.map
\ No newline at end of file
diff --git a/tests/baselines/reference/commonSourceDirectory_dts.js b/tests/baselines/reference/commonSourceDirectory_dts.js
index 249edecedddaa..1009ff9475bb2 100644
--- a/tests/baselines/reference/commonSourceDirectory_dts.js
+++ b/tests/baselines/reference/commonSourceDirectory_dts.js
@@ -15,7 +15,7 @@ export const x = y;
 exports.__esModule = true;
 /// <reference path="../lib/bar.d.ts" />
 exports.x = y;
-//# sourceMappingURL=/app/myMapRoot/index.js.map
+//# sourceMappingURL=../src/myMapRoot/index.js.map
 
 //// [/app/bin/index.d.ts]
 /// <reference path="../lib/bar.d.ts" />
diff --git a/tests/baselines/reference/commonSourceDirectory_dts.js.map b/tests/baselines/reference/commonSourceDirectory_dts.js.map
index 552da577884d8..2950d165917a6 100644
--- a/tests/baselines/reference/commonSourceDirectory_dts.js.map
+++ b/tests/baselines/reference/commonSourceDirectory_dts.js.map
@@ -1,2 +1,2 @@
 //// [/app/bin/index.js.map]
-{"version":3,"file":"index.js","sourceRoot":"/app/mySourceRoot/","sources":["index.ts"],"names":[],"mappings":";;AAAA,wCAAwC;AAC3B,QAAA,CAAC,GAAG,CAAC,CAAC"}
\ No newline at end of file
+{"version":3,"file":"index.js","sourceRoot":"mySourceRoot/","sources":["index.ts"],"names":[],"mappings":";;AAAA,wCAAwC;AAC3B,QAAA,CAAC,GAAG,CAAC,CAAC"}
\ No newline at end of file
diff --git a/tests/baselines/reference/commonSourceDirectory_dts.sourcemap.txt b/tests/baselines/reference/commonSourceDirectory_dts.sourcemap.txt
index 925a3d30ed4a2..fb2ef3596c602 100644
--- a/tests/baselines/reference/commonSourceDirectory_dts.sourcemap.txt
+++ b/tests/baselines/reference/commonSourceDirectory_dts.sourcemap.txt
@@ -1,7 +1,7 @@
 ===================================================================
 JsFile: index.js
-mapUrl: /app/myMapRoot/index.js.map
-sourceRoot: /app/mySourceRoot/
+mapUrl: ../src/myMapRoot/index.js.map
+sourceRoot: mySourceRoot/
 sources: index.ts
 ===================================================================
 -------------------------------------------------------------------
@@ -25,7 +25,7 @@ sourceFile:index.ts
 4 >         ^^^
 5 >            ^
 6 >             ^
-7 >              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^->
+7 >              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^->
 1 >
   >export const 
 2 >
@@ -40,4 +40,4 @@ sourceFile:index.ts
 5 >Emitted(4, 14) Source(2, 19) + SourceIndex(0)
 6 >Emitted(4, 15) Source(2, 20) + SourceIndex(0)
 ---
->>>//# sourceMappingURL=/app/myMapRoot/index.js.map
\ No newline at end of file
+>>>//# sourceMappingURL=../src/myMapRoot/index.js.map
\ No newline at end of file
diff --git a/tests/baselines/reference/conflictingCommonJSES2015Exports.symbols b/tests/baselines/reference/conflictingCommonJSES2015Exports.symbols
new file mode 100644
index 0000000000000..b022439bf31cf
--- /dev/null
+++ b/tests/baselines/reference/conflictingCommonJSES2015Exports.symbols
@@ -0,0 +1,18 @@
+=== tests/cases/conformance/salsa/bug24934.js ===
+export function abc(a, b, c) { return 5; }
+>abc : Symbol(abc, Decl(bug24934.js, 0, 0))
+>a : Symbol(a, Decl(bug24934.js, 0, 20))
+>b : Symbol(b, Decl(bug24934.js, 0, 22))
+>c : Symbol(c, Decl(bug24934.js, 0, 25))
+
+module.exports = { abc };
+>module : Symbol(module)
+>abc : Symbol(abc, Decl(bug24934.js, 1, 18))
+
+=== tests/cases/conformance/salsa/use.js ===
+import { abc } from './bug24934';
+>abc : Symbol(abc, Decl(use.js, 0, 8))
+
+abc(1, 2, 3);
+>abc : Symbol(abc, Decl(use.js, 0, 8))
+
diff --git a/tests/baselines/reference/conflictingCommonJSES2015Exports.types b/tests/baselines/reference/conflictingCommonJSES2015Exports.types
new file mode 100644
index 0000000000000..a9dc1ce80bd7c
--- /dev/null
+++ b/tests/baselines/reference/conflictingCommonJSES2015Exports.types
@@ -0,0 +1,27 @@
+=== tests/cases/conformance/salsa/bug24934.js ===
+export function abc(a, b, c) { return 5; }
+>abc : (a: any, b: any, c: any) => number
+>a : any
+>b : any
+>c : any
+>5 : 5
+
+module.exports = { abc };
+>module.exports = { abc } : { [x: string]: any; abc: (a: any, b: any, c: any) => number; }
+>module.exports : any
+>module : any
+>exports : any
+>{ abc } : { [x: string]: any; abc: (a: any, b: any, c: any) => number; }
+>abc : (a: any, b: any, c: any) => number
+
+=== tests/cases/conformance/salsa/use.js ===
+import { abc } from './bug24934';
+>abc : (a: any, b: any, c: any) => number
+
+abc(1, 2, 3);
+>abc(1, 2, 3) : number
+>abc : (a: any, b: any, c: any) => number
+>1 : 1
+>2 : 2
+>3 : 3
+
diff --git a/tests/baselines/reference/esModuleInteropPrettyErrorRelatedInformation.errors.txt b/tests/baselines/reference/esModuleInteropPrettyErrorRelatedInformation.errors.txt
new file mode 100644
index 0000000000000..96a31032d4dde
--- /dev/null
+++ b/tests/baselines/reference/esModuleInteropPrettyErrorRelatedInformation.errors.txt
@@ -0,0 +1,24 @@
+tests/cases/compiler/index.ts:3:8 - error TS2345: Argument of type '{ default: () => void; }' is not assignable to parameter of type '() => void'.
+  Type '{ default: () => void; }' provides no match for the signature '(): void'.
+
+3 invoke(foo);
+         ~~~
+
+  tests/cases/compiler/index.ts:1:1
+    1 import * as foo from "./foo";
+      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+    Type originates at this import. A namespace-style import cannot be called or constructed, and will cause a failure at runtime. Consider using a default import or import require here instead.
+
+
+==== tests/cases/compiler/foo.d.ts (0 errors) ====
+    declare function foo(): void;
+    declare namespace foo {}
+    export = foo;
+==== tests/cases/compiler/index.ts (1 errors) ====
+    import * as foo from "./foo";
+    function invoke(f: () => void) { f(); }
+    invoke(foo);
+           ~~~
+!!! error TS2345: Argument of type '{ default: () => void; }' is not assignable to parameter of type '() => void'.
+!!! error TS2345:   Type '{ default: () => void; }' provides no match for the signature '(): void'.
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/esModuleInteropPrettyErrorRelatedInformation.js b/tests/baselines/reference/esModuleInteropPrettyErrorRelatedInformation.js
new file mode 100644
index 0000000000000..80809deefc593
--- /dev/null
+++ b/tests/baselines/reference/esModuleInteropPrettyErrorRelatedInformation.js
@@ -0,0 +1,25 @@
+//// [tests/cases/compiler/esModuleInteropPrettyErrorRelatedInformation.ts] ////
+
+//// [foo.d.ts]
+declare function foo(): void;
+declare namespace foo {}
+export = foo;
+//// [index.ts]
+import * as foo from "./foo";
+function invoke(f: () => void) { f(); }
+invoke(foo);
+
+
+//// [index.js]
+"use strict";
+var __importStar = (this && this.__importStar) || function (mod) {
+    if (mod && mod.__esModule) return mod;
+    var result = {};
+    if (mod != null) for (var k in mod) if (Object.hasOwnProperty.call(mod, k)) result[k] = mod[k];
+    result["default"] = mod;
+    return result;
+};
+exports.__esModule = true;
+var foo = __importStar(require("./foo"));
+function invoke(f) { f(); }
+invoke(foo);
diff --git a/tests/baselines/reference/esModuleInteropPrettyErrorRelatedInformation.symbols b/tests/baselines/reference/esModuleInteropPrettyErrorRelatedInformation.symbols
new file mode 100644
index 0000000000000..9c632fa26da99
--- /dev/null
+++ b/tests/baselines/reference/esModuleInteropPrettyErrorRelatedInformation.symbols
@@ -0,0 +1,23 @@
+=== tests/cases/compiler/foo.d.ts ===
+declare function foo(): void;
+>foo : Symbol(foo, Decl(foo.d.ts, 0, 0), Decl(foo.d.ts, 0, 29))
+
+declare namespace foo {}
+>foo : Symbol(foo, Decl(foo.d.ts, 0, 0), Decl(foo.d.ts, 0, 29))
+
+export = foo;
+>foo : Symbol(foo, Decl(foo.d.ts, 0, 0), Decl(foo.d.ts, 0, 29))
+
+=== tests/cases/compiler/index.ts ===
+import * as foo from "./foo";
+>foo : Symbol(foo, Decl(index.ts, 0, 6))
+
+function invoke(f: () => void) { f(); }
+>invoke : Symbol(invoke, Decl(index.ts, 0, 29))
+>f : Symbol(f, Decl(index.ts, 1, 16))
+>f : Symbol(f, Decl(index.ts, 1, 16))
+
+invoke(foo);
+>invoke : Symbol(invoke, Decl(index.ts, 0, 29))
+>foo : Symbol(foo, Decl(index.ts, 0, 6))
+
diff --git a/tests/baselines/reference/esModuleInteropPrettyErrorRelatedInformation.types b/tests/baselines/reference/esModuleInteropPrettyErrorRelatedInformation.types
new file mode 100644
index 0000000000000..662932d82ed65
--- /dev/null
+++ b/tests/baselines/reference/esModuleInteropPrettyErrorRelatedInformation.types
@@ -0,0 +1,25 @@
+=== tests/cases/compiler/foo.d.ts ===
+declare function foo(): void;
+>foo : () => void
+
+declare namespace foo {}
+>foo : () => void
+
+export = foo;
+>foo : () => void
+
+=== tests/cases/compiler/index.ts ===
+import * as foo from "./foo";
+>foo : { default: () => void; }
+
+function invoke(f: () => void) { f(); }
+>invoke : (f: () => void) => void
+>f : () => void
+>f() : void
+>f : () => void
+
+invoke(foo);
+>invoke(foo) : void
+>invoke : (f: () => void) => void
+>foo : { default: () => void; }
+
diff --git a/tests/baselines/reference/exportNestedNamespaces.symbols b/tests/baselines/reference/exportNestedNamespaces.symbols
index e5fc5db16d9e9..10f1600a2df7b 100644
--- a/tests/baselines/reference/exportNestedNamespaces.symbols
+++ b/tests/baselines/reference/exportNestedNamespaces.symbols
@@ -12,7 +12,7 @@ exports.n.K = function () {
 >K : Symbol(n.K, Decl(mod.js, 0, 15))
 
     this.x = 10;
->this : Symbol(__object, Decl(mod.js, 0, 11))
+>this : Symbol(n, Decl(mod.js, 0, 0), Decl(mod.js, 1, 8))
 >x : Symbol(K.x, Decl(mod.js, 1, 27))
 }
 exports.Classic = class {
diff --git a/tests/baselines/reference/exportNestedNamespaces.types b/tests/baselines/reference/exportNestedNamespaces.types
index b6b701bc05f37..664429d802ca8 100644
--- a/tests/baselines/reference/exportNestedNamespaces.types
+++ b/tests/baselines/reference/exportNestedNamespaces.types
@@ -1,24 +1,24 @@
 === tests/cases/conformance/salsa/mod.js ===
 exports.n = {};
->exports.n = {} : { [x: string]: any; K: typeof K; }
->exports.n : { [x: string]: any; K: typeof K; }
+>exports.n = {} : typeof n
+>exports.n : typeof n
 >exports : typeof import("tests/cases/conformance/salsa/mod")
->n : { [x: string]: any; K: typeof K; }
->{} : { [x: string]: any; K: typeof K; }
+>n : typeof n
+>{} : { [x: string]: any; }
 
 exports.n.K = function () {
 >exports.n.K = function () {    this.x = 10;} : typeof K
 >exports.n.K : typeof K
->exports.n : { [x: string]: any; K: typeof K; }
+>exports.n : typeof n
 >exports : typeof import("tests/cases/conformance/salsa/mod")
->n : { [x: string]: any; K: typeof K; }
+>n : typeof n
 >K : typeof K
 >function () {    this.x = 10;} : typeof K
 
     this.x = 10;
 >this.x = 10 : 10
 >this.x : any
->this : { [x: string]: any; K: typeof K; }
+>this : typeof n
 >x : any
 >10 : 10
 }
@@ -47,9 +47,9 @@ var k = new s.n.K()
 >k : K
 >new s.n.K() : K
 >s.n.K : typeof K
->s.n : { [x: string]: any; K: typeof K; }
+>s.n : typeof s.n
 >s : typeof s
->n : { [x: string]: any; K: typeof K; }
+>n : typeof s.n
 >K : typeof K
 
 k.x
diff --git a/tests/baselines/reference/jsContainerMergeJsContainer.types b/tests/baselines/reference/jsContainerMergeJsContainer.types
index 6d25fb4608a65..5759b08561324 100644
--- a/tests/baselines/reference/jsContainerMergeJsContainer.types
+++ b/tests/baselines/reference/jsContainerMergeJsContainer.types
@@ -1,13 +1,13 @@
 === tests/cases/conformance/salsa/a.js ===
 // #24131
 const a = {};
->a : { [x: string]: any; d: { (): void; prototype: { [x: string]: any; }; }; }
->{} : { [x: string]: any; d: { (): void; prototype: { [x: string]: any; }; }; }
+>a : typeof a
+>{} : { [x: string]: any; }
 
 a.d = function() {};
 >a.d = function() {} : { (): void; prototype: { [x: string]: any; }; }
 >a.d : { (): void; prototype: { [x: string]: any; }; }
->a : { [x: string]: any; d: { (): void; prototype: { [x: string]: any; }; }; }
+>a : typeof a
 >d : { (): void; prototype: { [x: string]: any; }; }
 >function() {} : { (): void; prototype: { [x: string]: any; }; }
 
@@ -16,7 +16,7 @@ a.d.prototype = {};
 >a.d.prototype = {} : { [x: string]: any; }
 >a.d.prototype : { [x: string]: any; }
 >a.d : { (): void; prototype: { [x: string]: any; }; }
->a : { [x: string]: any; d: { (): void; prototype: { [x: string]: any; }; }; }
+>a : typeof a
 >d : { (): void; prototype: { [x: string]: any; }; }
 >prototype : { [x: string]: any; }
 >{} : { [x: string]: any; }
diff --git a/tests/baselines/reference/jsContainerMergeTsDeclaration3.types b/tests/baselines/reference/jsContainerMergeTsDeclaration3.types
index 1a29cab253872..d03c13764e657 100644
--- a/tests/baselines/reference/jsContainerMergeTsDeclaration3.types
+++ b/tests/baselines/reference/jsContainerMergeTsDeclaration3.types
@@ -5,7 +5,7 @@ declare class A {}
 === tests/cases/conformance/salsa/b.js ===
 const A = { };
 >A : typeof A
->{ } : { [x: string]: any; prototype: A; d: { [x: string]: any; }; }
+>{ } : { [x: string]: any; }
 
 A.d = { };
 >A.d = { } : { [x: string]: any; }
diff --git a/tests/baselines/reference/jsObjectsMarkedAsOpenEnded.types b/tests/baselines/reference/jsObjectsMarkedAsOpenEnded.types
index 69d00b6aa79ae..7c17e7c22bbf6 100644
--- a/tests/baselines/reference/jsObjectsMarkedAsOpenEnded.types
+++ b/tests/baselines/reference/jsObjectsMarkedAsOpenEnded.types
@@ -1,7 +1,7 @@
 === tests/cases/conformance/salsa/a.js ===
 var variable = {};
 >variable : { [x: string]: any; a: number; }
->{} : { [x: string]: any; a: number; }
+>{} : { [x: string]: any; }
 
 variable.a = 0;
 >variable.a = 0 : 0
diff --git a/tests/baselines/reference/jsdocParameterParsingInfiniteLoop.errors.txt b/tests/baselines/reference/jsdocParameterParsingInfiniteLoop.errors.txt
index a43c72cf0c723..71286e23bdbd3 100644
--- a/tests/baselines/reference/jsdocParameterParsingInfiniteLoop.errors.txt
+++ b/tests/baselines/reference/jsdocParameterParsingInfiniteLoop.errors.txt
@@ -1,11 +1,14 @@
 tests/cases/compiler/example.js(3,20): error TS1110: Type expected.
+tests/cases/compiler/example.js(3,21): error TS2304: Cannot find name 'foo'.
 
 
-==== tests/cases/compiler/example.js (1 errors) ====
+==== tests/cases/compiler/example.js (2 errors) ====
     // @ts-check
     /**
      * @type {function(@foo)}
                        ~
 !!! error TS1110: Type expected.
+                        ~~~
+!!! error TS2304: Cannot find name 'foo'.
      */
     let x;
\ No newline at end of file
diff --git a/tests/baselines/reference/moduleExportNestedNamespaces.types b/tests/baselines/reference/moduleExportNestedNamespaces.types
index 92dd4f14e6917..def26bac423c7 100644
--- a/tests/baselines/reference/moduleExportNestedNamespaces.types
+++ b/tests/baselines/reference/moduleExportNestedNamespaces.types
@@ -1,12 +1,12 @@
 === tests/cases/conformance/salsa/mod.js ===
 module.exports.n = {};
->module.exports.n = {} : { [x: string]: any; K: typeof C; }
+>module.exports.n = {} : any
 >module.exports.n : any
 >module.exports : any
 >module : any
 >exports : any
 >n : any
->{} : { [x: string]: any; K: typeof C; }
+>{} : { [x: string]: any; }
 
 module.exports.n.K = function C() {
 >module.exports.n.K = function C() {    this.x = 10;} : typeof C
@@ -54,9 +54,9 @@ var k = new s.n.K()
 >k : C
 >new s.n.K() : C
 >s.n.K : typeof C
->s.n : { [x: string]: any; K: typeof C; }
+>s.n : typeof s.n
 >s : typeof s
->n : { [x: string]: any; K: typeof C; }
+>n : typeof s.n
 >K : typeof C
 
 k.x
diff --git a/tests/baselines/reference/nestedPrototypeAssignment.types b/tests/baselines/reference/nestedPrototypeAssignment.types
index 620ca215f6d6a..1ac8ea1ad0328 100644
--- a/tests/baselines/reference/nestedPrototypeAssignment.types
+++ b/tests/baselines/reference/nestedPrototypeAssignment.types
@@ -1,19 +1,19 @@
 === tests/cases/conformance/salsa/mod.js ===
 // #24111 -- shouldn't assert
 C.prototype = {}
->C.prototype = {} : { [x: string]: any; bar: typeof C.prototype.bar; }
->C.prototype : { [x: string]: any; bar: typeof C.prototype.bar; }
+>C.prototype = {} : typeof C.prototype
+>C.prototype : typeof C.prototype
 >C : typeof C
->prototype : { [x: string]: any; bar: typeof C.prototype.bar; }
->{} : { [x: string]: any; bar: typeof C.prototype.bar; }
+>prototype : typeof C.prototype
+>{} : { [x: string]: any; }
 
 C.prototype.bar.foo = {};
 >C.prototype.bar.foo = {} : { [x: string]: any; }
 >C.prototype.bar.foo : { [x: string]: any; }
 >C.prototype.bar : typeof C.prototype.bar
->C.prototype : { [x: string]: any; bar: typeof C.prototype.bar; }
+>C.prototype : typeof C.prototype
 >C : typeof C
->prototype : { [x: string]: any; bar: typeof C.prototype.bar; }
+>prototype : typeof C.prototype
 >bar : typeof C.prototype.bar
 >foo : { [x: string]: any; }
 >{} : { [x: string]: any; }
diff --git a/tests/baselines/reference/noDuplicateJsdoc1.errors.txt b/tests/baselines/reference/noDuplicateJsdoc1.errors.txt
new file mode 100644
index 0000000000000..e24b3a2f7303a
--- /dev/null
+++ b/tests/baselines/reference/noDuplicateJsdoc1.errors.txt
@@ -0,0 +1,9 @@
+tests/cases/conformance/jsdoc/a.js(2,11): error TS2304: Cannot find name 'b'.
+
+
+==== tests/cases/conformance/jsdoc/a.js (1 errors) ====
+    /** doc */
+    const a = b = () => 0;
+              ~
+!!! error TS2304: Cannot find name 'b'.
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/noDuplicateJsdoc1.symbols b/tests/baselines/reference/noDuplicateJsdoc1.symbols
new file mode 100644
index 0000000000000..8e1f11f42e0a9
--- /dev/null
+++ b/tests/baselines/reference/noDuplicateJsdoc1.symbols
@@ -0,0 +1,5 @@
+=== tests/cases/conformance/jsdoc/a.js ===
+/** doc */
+const a = b = () => 0;
+>a : Symbol(a, Decl(a.js, 1, 5))
+
diff --git a/tests/baselines/reference/noDuplicateJsdoc1.types b/tests/baselines/reference/noDuplicateJsdoc1.types
new file mode 100644
index 0000000000000..2ad9c78594852
--- /dev/null
+++ b/tests/baselines/reference/noDuplicateJsdoc1.types
@@ -0,0 +1,9 @@
+=== tests/cases/conformance/jsdoc/a.js ===
+/** doc */
+const a = b = () => 0;
+>a : () => number
+>b = () => 0 : () => number
+>b : any
+>() => 0 : () => number
+>0 : 0
+
diff --git a/tests/baselines/reference/outfile-concat-fileListing.txt b/tests/baselines/reference/outfile-concat-fileListing.txt
deleted file mode 100644
index fc6a1e7b28ce3..0000000000000
--- a/tests/baselines/reference/outfile-concat-fileListing.txt
+++ /dev/null
@@ -1,43 +0,0 @@
-*/
- /lib/
- /lib/lib.d.ts
- /lib/lib.dom.d.ts
- /lib/lib.es5.d.ts
- /lib/lib.scripthost.d.ts
- /lib/lib.webworker.importscripts.d.ts
- /src/
- /src/2/
- /src/2/second-output.d.ts
- /src/2/second-output.d.ts.map
- /src/2/second-output.js
- /src/2/second-output.js.map
- /src/first/
- /src/first/bin/
- /src/first/bin/first-output.d.ts
- /src/first/bin/first-output.d.ts.map
- /src/first/bin/first-output.js
- /src/first/bin/first-output.js.map
- /src/first/first_part1.ts
- /src/first/first_part2.ts
- /src/first/first_part3.ts
- /src/first/tsconfig.json
- /src/first_part1.ts
- /src/first_part2.ts
- /src/first_part3.ts
- /src/second/
- /src/second/second_part1.ts
- /src/second/second_part2.ts
- /src/second/tsconfig.json
- /src/second_part1.ts
- /src/second_part2.ts
- /src/third/
- /src/third/third_part1.ts
- /src/third/thirdjs/
- /src/third/thirdjs/output/
- /src/third/thirdjs/output/third-output.d.ts
- /src/third/thirdjs/output/third-output.d.ts.map
- /src/third/thirdjs/output/third-output.js
- /src/third/thirdjs/output/third-output.js.map
- /src/third/tsconfig.json
- /src/third_part1.ts
- /src/tsconfig.json
\ No newline at end of file
diff --git a/tests/baselines/reference/outfile-concat.js b/tests/baselines/reference/outfile-concat.js
index e3e5aa3d5f003..e231f54ef9409 100644
--- a/tests/baselines/reference/outfile-concat.js
+++ b/tests/baselines/reference/outfile-concat.js
@@ -1,3 +1,88 @@
+//// [/src/2/second-output.d.ts]
+declare namespace N {
+}
+declare namespace N {
+}
+declare class C {
+    doSomething(): void;
+}
+//# sourceMappingURL=second-output.d.ts.map
+
+//// [/src/2/second-output.d.ts.map]
+{"version":3,"file":"second-output.d.ts","sourceRoot":"","sources":["../second/second_part1.ts","../second/second_part2.ts"],"names":[],"mappings":"AAAA,kBAAU,CAAC,CAAC;CAEX;AAED,kBAAU,CAAC,CAAC;CAMX;ACVD;IACI,WAAW;CAGd"}
+
+//// [/src/2/second-output.js]
+var N;
+(function (N) {
+    function f() {
+        console.log('testing');
+    }
+    f();
+})(N || (N = {}));
+var C = (function () {
+    function C() {
+    }
+    C.prototype.doSomething = function () {
+        console.log("something got done");
+    };
+    return C;
+}());
+//# sourceMappingURL=second-output.js.map
+
+//// [/src/2/second-output.js.map]
+{"version":3,"file":"second-output.js","sourceRoot":"","sources":["../second/second_part1.ts","../second/second_part2.ts"],"names":[],"mappings":"AAIA,IAAU,CAAC,CAMV;AAND,WAAU,CAAC;IACP;QACI,OAAO,CAAC,GAAG,CAAC,SAAS,CAAC,CAAC;IAC3B,CAAC;IAED,CAAC,EAAE,CAAC;AACR,CAAC,EANS,CAAC,KAAD,CAAC,QAMV;ACVD;IAAA;IAIA,CAAC;IAHG,uBAAW,GAAX;QACI,OAAO,CAAC,GAAG,CAAC,oBAAoB,CAAC,CAAC;IACtC,CAAC;IACL,QAAC;AAAD,CAAC,AAJD,IAIC"}
+
+//// [/src/first/bin/first-output.d.ts]
+interface TheFirst {
+    none: any;
+}
+declare const s = "Hello, world";
+interface NoJsForHereEither {
+    none: any;
+}
+declare function f(): string;
+//# sourceMappingURL=first-output.d.ts.map
+
+//// [/src/first/bin/first-output.d.ts.map]
+{"version":3,"file":"first-output.d.ts","sourceRoot":"","sources":["../first_PART1.ts","../first_part2.ts","../first_part3.ts"],"names":[],"mappings":"AAAA,UAAU,QAAQ;IACd,IAAI,EAAE,GAAG,CAAC;CACb;AAED,QAAA,MAAM,CAAC,iBAAiB,CAAC;AAEzB,UAAU,iBAAiB;IACvB,IAAI,EAAE,GAAG,CAAC;CACb;AERD,6BAEC"}
+
+//// [/src/first/bin/first-output.js]
+var s = "Hello, world";
+console.log(s);
+console.log(f());
+function f() {
+    return "JS does hoists";
+}
+//# sourceMappingURL=first-output.js.map
+
+//// [/src/first/bin/first-output.js.map]
+{"version":3,"file":"first-output.js","sourceRoot":"","sources":["../first_PART1.ts","../first_part2.ts","../first_part3.ts"],"names":[],"mappings":"AAIA,IAAM,CAAC,GAAG,cAAc,CAAC;AAMzB,OAAO,CAAC,GAAG,CAAC,CAAC,CAAC,CAAC;ACVf,OAAO,CAAC,GAAG,CAAC,CAAC,EAAE,CAAC,CAAC;ACAjB;IACI,OAAO,gBAAgB,CAAC;AAC5B,CAAC"}
+
+//// [/src/third/thirdjs/output/third-output.d.ts]
+interface TheFirst {
+    none: any;
+}
+declare const s = "Hello, world";
+interface NoJsForHereEither {
+    none: any;
+}
+declare function f(): string;
+//# sourceMappingURL=first-output.d.ts.map
+declare namespace N {
+}
+declare namespace N {
+}
+declare class C {
+    doSomething(): void;
+}
+//# sourceMappingURL=second-output.d.ts.map
+declare var c: C;
+//# sourceMappingURL=third-output.d.ts.map
+
+//// [/src/third/thirdjs/output/third-output.d.ts.map]
+{"version":3,"file":"third-output.d.ts","sourceRoot":"","sources":["../../third_part1.ts","../../../first/first_PART1.ts","../../../first/first_part3.ts","../../../second/second_part1.ts","../../../second/second_part2.ts"],"names":[],"mappings":"ACAA,UAAU,QAAQ;IACd,IAAI,EAAE,GAAG,CAAC;CACb;AAED,QAAA,MAAM,CAAC,iBAAiB,CAAC;AAEzB,UAAU,iBAAiB;IACvB,IAAI,EAAE,GAAG,CAAC;CACb;ACRD,6BAEC;;ACFD,kBAAU,CAAC,CAAC;CAEX;AAED,kBAAU,CAAC,CAAC;CAMX;ACVD;IACI,WAAW;CAGd;;AJJD,QAAA,IAAI,CAAC,GAAU,CAAC"}
+
+//// [/src/third/thirdjs/output/third-output.js]
 var s = "Hello, world";
 console.log(s);
 console.log(f());
@@ -23,4 +108,8 @@ var C = (function () {
 //# sourceMappingURL=second-output.js.map
 var c = new C();
 c.doSomething();
-//# sourceMappingURL=third-output.js.map
\ No newline at end of file
+//# sourceMappingURL=third-output.js.map
+
+//// [/src/third/thirdjs/output/third-output.js.map]
+{"version":3,"file":"third-output.js","sourceRoot":"","sources":["../../third_part1.ts","../../../first/first_PART1.ts","../../../first/first_part2.ts","../../../first/first_part3.ts","../../../second/second_part1.ts","../../../second/second_part2.ts"],"names":[],"mappings":"ACIA,IAAM,CAAC,GAAG,cAAc,CAAC;AAMzB,OAAO,CAAC,GAAG,CAAC,CAAC,CAAC,CAAC;ACVf,OAAO,CAAC,GAAG,CAAC,CAAC,EAAE,CAAC,CAAC;ACAjB;IACI,OAAO,gBAAgB,CAAC;AAC5B,CAAC;;ACED,IAAU,CAAC,CAMV;AAND,WAAU,CAAC;IACP;QACI,OAAO,CAAC,GAAG,CAAC,SAAS,CAAC,CAAC;IAC3B,CAAC;IAED,CAAC,EAAE,CAAC;AACR,CAAC,EANS,CAAC,KAAD,CAAC,QAMV;ACVD;IAAA;IAIA,CAAC;IAHG,uBAAW,GAAX;QACI,OAAO,CAAC,GAAG,CAAC,oBAAoB,CAAC,CAAC;IACtC,CAAC;IACL,QAAC;AAAD,CAAC,AAJD,IAIC;;ALJD,IAAI,CAAC,GAAG,IAAI,CAAC,EAAE,CAAC;AAChB,CAAC,CAAC,WAAW,EAAE,CAAC"}
+
diff --git a/tests/baselines/reference/outfile-concat.js.map b/tests/baselines/reference/outfile-concat.js.map
deleted file mode 100644
index f8220832b2ac2..0000000000000
--- a/tests/baselines/reference/outfile-concat.js.map
+++ /dev/null
@@ -1 +0,0 @@
-{"version":3,"file":"third-output.js","sections":[{"offset":{"line":0,"column":0},"map":{"version":3,"file":"first-output.js","sourceRoot":"","sources":["first_part1.ts","first_part2.ts","first_part3.ts"],"names":[],"mappings":"AAIA,IAAM,CAAC,GAAG,cAAc,CAAC;AAMzB,OAAO,CAAC,GAAG,CAAC,CAAC,CAAC,CAAC;ACVf,OAAO,CAAC,GAAG,CAAC,CAAC,EAAE,CAAC,CAAC;ACAjB;IACI,OAAO,gBAAgB,CAAC;AAC5B,CAAC"}},{"offset":{"line":7,"column":0},"map":{"version":3,"file":"second-output.js","sourceRoot":"","sources":["second_part1.ts","second_part2.ts"],"names":[],"mappings":"AAIA,IAAU,CAAC,CAMV;AAND,WAAU,CAAC;IACP;QACI,OAAO,CAAC,GAAG,CAAC,SAAS,CAAC,CAAC;IAC3B,CAAC;IAED,CAAC,EAAE,CAAC;AACR,CAAC,EANS,CAAC,KAAD,CAAC,QAMV;ACVD;IAAA;IAIA,CAAC;IAHG,uBAAW,GAAX;QACI,OAAO,CAAC,GAAG,CAAC,oBAAoB,CAAC,CAAC;IACtC,CAAC;IACL,QAAC;AAAD,CAAC,AAJD,IAIC"}},{"offset":{"line":22,"column":41},"map":{"version":3,"file":"third-output.js","sourceRoot":"","sources":["third_part1.ts"],"names":[],"mappings":";AAAA,IAAI,CAAC,GAAG,IAAI,CAAC,EAAE,CAAC;AAChB,CAAC,CAAC,WAAW,EAAE,CAAC"}}]}
\ No newline at end of file
diff --git a/tests/baselines/reference/symbolLinkDeclarationEmitModuleNames.js b/tests/baselines/reference/symbolLinkDeclarationEmitModuleNames.js
new file mode 100644
index 0000000000000..59eb99f24952a
--- /dev/null
+++ b/tests/baselines/reference/symbolLinkDeclarationEmitModuleNames.js
@@ -0,0 +1,116 @@
+//// [tests/cases/compiler/symbolLinkDeclarationEmitModuleNames.ts] ////
+
+//// [application.ts]
+import { Constructor } from "@loopback/context";
+export type ControllerClass = Constructor<any>;
+//// [usage.ts]
+import { ControllerClass } from './application';
+import { BindingKey } from '@loopback/context';
+
+export const CONTROLLER_CLASS = BindingKey.create<ControllerClass>(null as any); // line in question
+//// [value-promise.ts]
+export type Constructor<T> = (...args: any[]) => T;
+//// [bindingkey.ts]
+import { Constructor } from "@loopback/context"
+export class BindingKey<T> {
+  readonly __type: T;
+  static create<T extends Constructor<any>>(ctor: T) {
+    return new BindingKey<T>();
+  }
+}
+
+//// [index.ts]
+export * from "./src/value-promise";
+export * from "./src/bindingkey";
+
+
+//// [value-promise.js]
+"use strict";
+exports.__esModule = true;
+//// [bindingkey.js]
+"use strict";
+exports.__esModule = true;
+var BindingKey = /** @class */ (function () {
+    function BindingKey() {
+    }
+    BindingKey.create = function (ctor) {
+        return new BindingKey();
+    };
+    return BindingKey;
+}());
+exports.BindingKey = BindingKey;
+//// [index.js]
+"use strict";
+function __export(m) {
+    for (var p in m) if (!exports.hasOwnProperty(p)) exports[p] = m[p];
+}
+exports.__esModule = true;
+__export(require("./src/bindingkey"));
+//// [application.js]
+"use strict";
+exports.__esModule = true;
+//// [usage.js]
+"use strict";
+exports.__esModule = true;
+var context_1 = require("@loopback/context");
+exports.CONTROLLER_CLASS = context_1.BindingKey.create(null); // line in question
+
+
+//// [value-promise.d.ts]
+export declare type Constructor<T> = (...args: any[]) => T;
+//// [bindingkey.d.ts]
+import { Constructor } from "@loopback/context";
+export declare class BindingKey<T> {
+    readonly __type: T;
+    static create<T extends Constructor<any>>(ctor: T): BindingKey<T>;
+}
+//// [index.d.ts]
+export * from "./src/value-promise";
+export * from "./src/bindingkey";
+//// [application.d.ts]
+import { Constructor } from "@loopback/context";
+export declare type ControllerClass = Constructor<any>;
+//// [usage.d.ts]
+import { BindingKey } from '@loopback/context';
+export declare const CONTROLLER_CLASS: BindingKey<import("@loopback/context/src/value-promise").Constructor<any>>;
+
+
+//// [DtsFileErrors]
+
+
+tests/cases/compiler/monorepo/context/src/bindingkey.d.ts(1,29): error TS2307: Cannot find module '@loopback/context'.
+tests/cases/compiler/monorepo/core/src/application.d.ts(1,29): error TS2307: Cannot find module '@loopback/context'.
+tests/cases/compiler/monorepo/core/src/usage.d.ts(1,28): error TS2307: Cannot find module '@loopback/context'.
+tests/cases/compiler/monorepo/core/src/usage.d.ts(2,51): error TS2307: Cannot find module '@loopback/context/src/value-promise'.
+
+
+==== tests/cases/compiler/monorepo/core/src/application.d.ts (1 errors) ====
+    import { Constructor } from "@loopback/context";
+                                ~~~~~~~~~~~~~~~~~~~
+!!! error TS2307: Cannot find module '@loopback/context'.
+    export declare type ControllerClass = Constructor<any>;
+    
+==== tests/cases/compiler/monorepo/core/src/usage.d.ts (2 errors) ====
+    import { BindingKey } from '@loopback/context';
+                               ~~~~~~~~~~~~~~~~~~~
+!!! error TS2307: Cannot find module '@loopback/context'.
+    export declare const CONTROLLER_CLASS: BindingKey<import("@loopback/context/src/value-promise").Constructor<any>>;
+                                                      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+!!! error TS2307: Cannot find module '@loopback/context/src/value-promise'.
+    
+==== /.src/tests/cases/compiler/monorepo/context/src/value-promise.d.ts (0 errors) ====
+    export declare type Constructor<T> = (...args: any[]) => T;
+    
+==== /.src/tests/cases/compiler/monorepo/context/src/bindingkey.d.ts (1 errors) ====
+    import { Constructor } from "@loopback/context";
+                                ~~~~~~~~~~~~~~~~~~~
+!!! error TS2307: Cannot find module '@loopback/context'.
+    export declare class BindingKey<T> {
+        readonly __type: T;
+        static create<T extends Constructor<any>>(ctor: T): BindingKey<T>;
+    }
+    
+==== /.src/tests/cases/compiler/monorepo/context/index.d.ts (0 errors) ====
+    export * from "./src/value-promise";
+    export * from "./src/bindingkey";
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/symbolLinkDeclarationEmitModuleNames.symbols b/tests/baselines/reference/symbolLinkDeclarationEmitModuleNames.symbols
new file mode 100644
index 0000000000000..15b88cbe0bf19
--- /dev/null
+++ b/tests/baselines/reference/symbolLinkDeclarationEmitModuleNames.symbols
@@ -0,0 +1,59 @@
+=== tests/cases/compiler/monorepo/core/src/application.ts ===
+import { Constructor } from "@loopback/context";
+>Constructor : Symbol(Constructor, Decl(application.ts, 0, 8))
+
+export type ControllerClass = Constructor<any>;
+>ControllerClass : Symbol(ControllerClass, Decl(application.ts, 0, 48))
+>Constructor : Symbol(Constructor, Decl(application.ts, 0, 8))
+
+=== tests/cases/compiler/monorepo/core/src/usage.ts ===
+import { ControllerClass } from './application';
+>ControllerClass : Symbol(ControllerClass, Decl(usage.ts, 0, 8))
+
+import { BindingKey } from '@loopback/context';
+>BindingKey : Symbol(BindingKey, Decl(usage.ts, 1, 8))
+
+export const CONTROLLER_CLASS = BindingKey.create<ControllerClass>(null as any); // line in question
+>CONTROLLER_CLASS : Symbol(CONTROLLER_CLASS, Decl(usage.ts, 3, 12))
+>BindingKey.create : Symbol(BindingKey.create, Decl(bindingkey.ts, 2, 21))
+>BindingKey : Symbol(BindingKey, Decl(usage.ts, 1, 8))
+>create : Symbol(BindingKey.create, Decl(bindingkey.ts, 2, 21))
+>ControllerClass : Symbol(ControllerClass, Decl(usage.ts, 0, 8))
+
+=== tests/cases/compiler/monorepo/context/src/value-promise.ts ===
+export type Constructor<T> = (...args: any[]) => T;
+>Constructor : Symbol(Constructor, Decl(value-promise.ts, 0, 0))
+>T : Symbol(T, Decl(value-promise.ts, 0, 24))
+>args : Symbol(args, Decl(value-promise.ts, 0, 30))
+>T : Symbol(T, Decl(value-promise.ts, 0, 24))
+
+=== tests/cases/compiler/monorepo/context/src/bindingkey.ts ===
+import { Constructor } from "@loopback/context"
+>Constructor : Symbol(Constructor, Decl(bindingkey.ts, 0, 8))
+
+export class BindingKey<T> {
+>BindingKey : Symbol(BindingKey, Decl(bindingkey.ts, 0, 47))
+>T : Symbol(T, Decl(bindingkey.ts, 1, 24))
+
+  readonly __type: T;
+>__type : Symbol(BindingKey.__type, Decl(bindingkey.ts, 1, 28))
+>T : Symbol(T, Decl(bindingkey.ts, 1, 24))
+
+  static create<T extends Constructor<any>>(ctor: T) {
+>create : Symbol(BindingKey.create, Decl(bindingkey.ts, 2, 21))
+>T : Symbol(T, Decl(bindingkey.ts, 3, 16))
+>Constructor : Symbol(Constructor, Decl(bindingkey.ts, 0, 8))
+>ctor : Symbol(ctor, Decl(bindingkey.ts, 3, 44))
+>T : Symbol(T, Decl(bindingkey.ts, 3, 16))
+
+    return new BindingKey<T>();
+>BindingKey : Symbol(BindingKey, Decl(bindingkey.ts, 0, 47))
+>T : Symbol(T, Decl(bindingkey.ts, 3, 16))
+  }
+}
+
+=== tests/cases/compiler/monorepo/context/index.ts ===
+export * from "./src/value-promise";
+No type information for this code.export * from "./src/bindingkey";
+No type information for this code.
+No type information for this code.
\ No newline at end of file
diff --git a/tests/baselines/reference/symbolLinkDeclarationEmitModuleNames.types b/tests/baselines/reference/symbolLinkDeclarationEmitModuleNames.types
new file mode 100644
index 0000000000000..a83fe0d650ce3
--- /dev/null
+++ b/tests/baselines/reference/symbolLinkDeclarationEmitModuleNames.types
@@ -0,0 +1,63 @@
+=== tests/cases/compiler/monorepo/core/src/application.ts ===
+import { Constructor } from "@loopback/context";
+>Constructor : any
+
+export type ControllerClass = Constructor<any>;
+>ControllerClass : Constructor<any>
+>Constructor : Constructor<T>
+
+=== tests/cases/compiler/monorepo/core/src/usage.ts ===
+import { ControllerClass } from './application';
+>ControllerClass : any
+
+import { BindingKey } from '@loopback/context';
+>BindingKey : typeof BindingKey
+
+export const CONTROLLER_CLASS = BindingKey.create<ControllerClass>(null as any); // line in question
+>CONTROLLER_CLASS : BindingKey<import("tests/cases/compiler/monorepo/context/src/value-promise").Constructor<any>>
+>BindingKey.create<ControllerClass>(null as any) : BindingKey<import("tests/cases/compiler/monorepo/context/src/value-promise").Constructor<any>>
+>BindingKey.create : <T extends import("tests/cases/compiler/monorepo/context/src/value-promise").Constructor<any>>(ctor: T) => BindingKey<T>
+>BindingKey : typeof BindingKey
+>create : <T extends import("tests/cases/compiler/monorepo/context/src/value-promise").Constructor<any>>(ctor: T) => BindingKey<T>
+>ControllerClass : import("tests/cases/compiler/monorepo/context/src/value-promise").Constructor<any>
+>null as any : any
+>null : null
+
+=== tests/cases/compiler/monorepo/context/src/value-promise.ts ===
+export type Constructor<T> = (...args: any[]) => T;
+>Constructor : Constructor<T>
+>T : T
+>args : any[]
+>T : T
+
+=== tests/cases/compiler/monorepo/context/src/bindingkey.ts ===
+import { Constructor } from "@loopback/context"
+>Constructor : any
+
+export class BindingKey<T> {
+>BindingKey : BindingKey<T>
+>T : T
+
+  readonly __type: T;
+>__type : T
+>T : T
+
+  static create<T extends Constructor<any>>(ctor: T) {
+>create : <T extends Constructor<any>>(ctor: T) => BindingKey<T>
+>T : T
+>Constructor : Constructor<T>
+>ctor : T
+>T : T
+
+    return new BindingKey<T>();
+>new BindingKey<T>() : BindingKey<T>
+>BindingKey : typeof BindingKey
+>T : T
+  }
+}
+
+=== tests/cases/compiler/monorepo/context/index.ts ===
+export * from "./src/value-promise";
+No type information for this code.export * from "./src/bindingkey";
+No type information for this code.
+No type information for this code.
\ No newline at end of file
diff --git a/tests/baselines/reference/symbolLinkDeclarationEmitModuleNamesRootDir.js b/tests/baselines/reference/symbolLinkDeclarationEmitModuleNamesRootDir.js
new file mode 100644
index 0000000000000..a95fb2c694d4d
--- /dev/null
+++ b/tests/baselines/reference/symbolLinkDeclarationEmitModuleNamesRootDir.js
@@ -0,0 +1,87 @@
+//// [tests/cases/compiler/symbolLinkDeclarationEmitModuleNamesRootDir.ts] ////
+
+//// [value-promise.d.ts]
+export type Constructor<T> = (...args: any[]) => T;
+//// [bindingkey.d.ts]
+import { Constructor } from "./value-promise"
+export declare class BindingKey<T> {
+  readonly __type: T;
+  static create<T extends Constructor<any>>(ctor: T): BindingKey<T>;
+}
+
+//// [index.d.ts]
+export * from "./src/value-promise";
+export * from "./src/bindingkey";
+
+//// [application.ts]
+import { Constructor } from "@loopback/context";
+export type ControllerClass = Constructor<any>;
+
+//// [usage.ts]
+import { ControllerClass } from './application';
+import { BindingKey } from '@loopback/context';
+
+export const CONTROLLER_CLASS = BindingKey.create<ControllerClass>(null as any); // line in question
+
+
+//// [application.js]
+"use strict";
+exports.__esModule = true;
+//// [usage.js]
+"use strict";
+exports.__esModule = true;
+var context_1 = require("@loopback/context");
+exports.CONTROLLER_CLASS = context_1.BindingKey.create(null); // line in question
+
+
+//// [application.d.ts]
+import { Constructor } from "@loopback/context";
+export declare type ControllerClass = Constructor<any>;
+//// [usage.d.ts]
+import { BindingKey } from '@loopback/context';
+export declare const CONTROLLER_CLASS: BindingKey<import("@loopback/context/src/value-promise").Constructor<any>>;
+
+
+//// [DtsFileErrors]
+
+
+tests/cases/compiler/monorepo/core/dist/src/application.d.ts(1,29): error TS2307: Cannot find module '@loopback/context'.
+tests/cases/compiler/monorepo/core/dist/src/usage.d.ts(1,28): error TS2307: Cannot find module '@loopback/context'.
+tests/cases/compiler/monorepo/core/dist/src/usage.d.ts(2,51): error TS2307: Cannot find module '@loopback/context/src/value-promise'.
+
+
+==== tests/cases/compiler/monorepo/core/tsconfig.json (0 errors) ====
+    {
+      "compilerOptions": {
+        "rootDir": ".",
+        "declaration": true,
+        "outDir": "./dist"
+      }
+    }
+==== tests/cases/compiler/monorepo/context/src/value-promise.d.ts (0 errors) ====
+    export type Constructor<T> = (...args: any[]) => T;
+==== tests/cases/compiler/monorepo/context/src/bindingkey.d.ts (0 errors) ====
+    import { Constructor } from "./value-promise"
+    export declare class BindingKey<T> {
+      readonly __type: T;
+      static create<T extends Constructor<any>>(ctor: T): BindingKey<T>;
+    }
+    
+==== tests/cases/compiler/monorepo/context/index.d.ts (0 errors) ====
+    export * from "./src/value-promise";
+    export * from "./src/bindingkey";
+    
+==== tests/cases/compiler/monorepo/core/dist/src/application.d.ts (1 errors) ====
+    import { Constructor } from "@loopback/context";
+                                ~~~~~~~~~~~~~~~~~~~
+!!! error TS2307: Cannot find module '@loopback/context'.
+    export declare type ControllerClass = Constructor<any>;
+    
+==== tests/cases/compiler/monorepo/core/dist/src/usage.d.ts (2 errors) ====
+    import { BindingKey } from '@loopback/context';
+                               ~~~~~~~~~~~~~~~~~~~
+!!! error TS2307: Cannot find module '@loopback/context'.
+    export declare const CONTROLLER_CLASS: BindingKey<import("@loopback/context/src/value-promise").Constructor<any>>;
+                                                      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+!!! error TS2307: Cannot find module '@loopback/context/src/value-promise'.
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/symbolLinkDeclarationEmitModuleNamesRootDir.symbols b/tests/baselines/reference/symbolLinkDeclarationEmitModuleNamesRootDir.symbols
new file mode 100644
index 0000000000000..a00e7c438b11f
--- /dev/null
+++ b/tests/baselines/reference/symbolLinkDeclarationEmitModuleNamesRootDir.symbols
@@ -0,0 +1,55 @@
+=== tests/cases/compiler/monorepo/context/src/value-promise.d.ts ===
+export type Constructor<T> = (...args: any[]) => T;
+>Constructor : Symbol(Constructor, Decl(value-promise.d.ts, 0, 0))
+>T : Symbol(T, Decl(value-promise.d.ts, 0, 24))
+>args : Symbol(args, Decl(value-promise.d.ts, 0, 30))
+>T : Symbol(T, Decl(value-promise.d.ts, 0, 24))
+
+=== tests/cases/compiler/monorepo/context/src/bindingkey.d.ts ===
+import { Constructor } from "./value-promise"
+>Constructor : Symbol(Constructor, Decl(bindingkey.d.ts, 0, 8))
+
+export declare class BindingKey<T> {
+>BindingKey : Symbol(BindingKey, Decl(bindingkey.d.ts, 0, 45))
+>T : Symbol(T, Decl(bindingkey.d.ts, 1, 32))
+
+  readonly __type: T;
+>__type : Symbol(BindingKey.__type, Decl(bindingkey.d.ts, 1, 36))
+>T : Symbol(T, Decl(bindingkey.d.ts, 1, 32))
+
+  static create<T extends Constructor<any>>(ctor: T): BindingKey<T>;
+>create : Symbol(BindingKey.create, Decl(bindingkey.d.ts, 2, 21))
+>T : Symbol(T, Decl(bindingkey.d.ts, 3, 16))
+>Constructor : Symbol(Constructor, Decl(bindingkey.d.ts, 0, 8))
+>ctor : Symbol(ctor, Decl(bindingkey.d.ts, 3, 44))
+>T : Symbol(T, Decl(bindingkey.d.ts, 3, 16))
+>BindingKey : Symbol(BindingKey, Decl(bindingkey.d.ts, 0, 45))
+>T : Symbol(T, Decl(bindingkey.d.ts, 3, 16))
+}
+
+=== tests/cases/compiler/monorepo/context/index.d.ts ===
+export * from "./src/value-promise";
+No type information for this code.export * from "./src/bindingkey";
+No type information for this code.
+No type information for this code.=== tests/cases/compiler/monorepo/core/src/application.ts ===
+import { Constructor } from "@loopback/context";
+>Constructor : Symbol(Constructor, Decl(application.ts, 0, 8))
+
+export type ControllerClass = Constructor<any>;
+>ControllerClass : Symbol(ControllerClass, Decl(application.ts, 0, 48))
+>Constructor : Symbol(Constructor, Decl(application.ts, 0, 8))
+
+=== tests/cases/compiler/monorepo/core/src/usage.ts ===
+import { ControllerClass } from './application';
+>ControllerClass : Symbol(ControllerClass, Decl(usage.ts, 0, 8))
+
+import { BindingKey } from '@loopback/context';
+>BindingKey : Symbol(BindingKey, Decl(usage.ts, 1, 8))
+
+export const CONTROLLER_CLASS = BindingKey.create<ControllerClass>(null as any); // line in question
+>CONTROLLER_CLASS : Symbol(CONTROLLER_CLASS, Decl(usage.ts, 3, 12))
+>BindingKey.create : Symbol(BindingKey.create, Decl(bindingkey.d.ts, 2, 21))
+>BindingKey : Symbol(BindingKey, Decl(usage.ts, 1, 8))
+>create : Symbol(BindingKey.create, Decl(bindingkey.d.ts, 2, 21))
+>ControllerClass : Symbol(ControllerClass, Decl(usage.ts, 0, 8))
+
diff --git a/tests/baselines/reference/symbolLinkDeclarationEmitModuleNamesRootDir.types b/tests/baselines/reference/symbolLinkDeclarationEmitModuleNamesRootDir.types
new file mode 100644
index 0000000000000..c708cdb94be0d
--- /dev/null
+++ b/tests/baselines/reference/symbolLinkDeclarationEmitModuleNamesRootDir.types
@@ -0,0 +1,58 @@
+=== tests/cases/compiler/monorepo/context/src/value-promise.d.ts ===
+export type Constructor<T> = (...args: any[]) => T;
+>Constructor : Constructor<T>
+>T : T
+>args : any[]
+>T : T
+
+=== tests/cases/compiler/monorepo/context/src/bindingkey.d.ts ===
+import { Constructor } from "./value-promise"
+>Constructor : any
+
+export declare class BindingKey<T> {
+>BindingKey : BindingKey<T>
+>T : T
+
+  readonly __type: T;
+>__type : T
+>T : T
+
+  static create<T extends Constructor<any>>(ctor: T): BindingKey<T>;
+>create : <T extends Constructor<any>>(ctor: T) => BindingKey<T>
+>T : T
+>Constructor : Constructor<T>
+>ctor : T
+>T : T
+>BindingKey : BindingKey<T>
+>T : T
+}
+
+=== tests/cases/compiler/monorepo/context/index.d.ts ===
+export * from "./src/value-promise";
+No type information for this code.export * from "./src/bindingkey";
+No type information for this code.
+No type information for this code.=== tests/cases/compiler/monorepo/core/src/application.ts ===
+import { Constructor } from "@loopback/context";
+>Constructor : any
+
+export type ControllerClass = Constructor<any>;
+>ControllerClass : Constructor<any>
+>Constructor : Constructor<T>
+
+=== tests/cases/compiler/monorepo/core/src/usage.ts ===
+import { ControllerClass } from './application';
+>ControllerClass : any
+
+import { BindingKey } from '@loopback/context';
+>BindingKey : typeof BindingKey
+
+export const CONTROLLER_CLASS = BindingKey.create<ControllerClass>(null as any); // line in question
+>CONTROLLER_CLASS : BindingKey<import("tests/cases/compiler/monorepo/context/src/value-promise").Constructor<any>>
+>BindingKey.create<ControllerClass>(null as any) : BindingKey<import("tests/cases/compiler/monorepo/context/src/value-promise").Constructor<any>>
+>BindingKey.create : <T extends import("tests/cases/compiler/monorepo/context/src/value-promise").Constructor<any>>(ctor: T) => BindingKey<T>
+>BindingKey : typeof BindingKey
+>create : <T extends import("tests/cases/compiler/monorepo/context/src/value-promise").Constructor<any>>(ctor: T) => BindingKey<T>
+>ControllerClass : import("tests/cases/compiler/monorepo/context/src/value-promise").Constructor<any>
+>null as any : any
+>null : null
+
diff --git a/tests/baselines/reference/third-output.js b/tests/baselines/reference/third-output.js
deleted file mode 100644
index e3e5aa3d5f003..0000000000000
--- a/tests/baselines/reference/third-output.js
+++ /dev/null
@@ -1,26 +0,0 @@
-var s = "Hello, world";
-console.log(s);
-console.log(f());
-function f() {
-    return "JS does hoists";
-}
-//# sourceMappingURL=first-output.js.map
-var N;
-(function (N) {
-    function f() {
-        console.log('testing');
-    }
-    f();
-})(N || (N = {}));
-var C = (function () {
-    function C() {
-    }
-    C.prototype.doSomething = function () {
-        console.log("something got done");
-    };
-    return C;
-}());
-//# sourceMappingURL=second-output.js.map
-var c = new C();
-c.doSomething();
-//# sourceMappingURL=third-output.js.map
\ No newline at end of file
diff --git a/tests/baselines/reference/third-output.js.map b/tests/baselines/reference/third-output.js.map
index 70b9ad69d5349..744f7f7483ae0 100644
--- a/tests/baselines/reference/third-output.js.map
+++ b/tests/baselines/reference/third-output.js.map
@@ -1 +1 @@
-{"version":3,"file":"third-output.js","sections":[{"offset":{"line":0,"column":0},"map":{"version":3,"file":"first-output.js","sourceRoot":"","sources":["../first_part1.ts","../first_part2.ts","../first_part3.ts"],"names":[],"mappings":"AAIA,IAAM,CAAC,GAAG,cAAc,CAAC;AAMzB,OAAO,CAAC,GAAG,CAAC,CAAC,CAAC,CAAC;ACVf,OAAO,CAAC,GAAG,CAAC,CAAC,EAAE,CAAC,CAAC;ACAjB;IACI,OAAO,gBAAgB,CAAC;AAC5B,CAAC"}},{"offset":{"line":7,"column":0},"map":{"version":3,"file":"second-output.js","sourceRoot":"","sources":["../second/second_part1.ts","../second/second_part2.ts"],"names":[],"mappings":"AAIA,IAAU,CAAC,CAMV;AAND,WAAU,CAAC;IACP;QACI,OAAO,CAAC,GAAG,CAAC,SAAS,CAAC,CAAC;IAC3B,CAAC;IAED,CAAC,EAAE,CAAC;AACR,CAAC,EANS,CAAC,KAAD,CAAC,QAMV;ACVD;IAAA;IAIA,CAAC;IAHG,uBAAW,GAAX;QACI,OAAO,CAAC,GAAG,CAAC,oBAAoB,CAAC,CAAC;IACtC,CAAC;IACL,QAAC;AAAD,CAAC,AAJD,IAIC"}},{"offset":{"line":22,"column":41},"map":{"version":3,"file":"third-output.js","sourceRoot":"","sources":["../../third_part1.ts"],"names":[],"mappings":";AAAA,IAAI,CAAC,GAAG,IAAI,CAAC,EAAE,CAAC;AAChB,CAAC,CAAC,WAAW,EAAE,CAAC"}}]}
\ No newline at end of file
+{"version":3,"file":"third-output.js","sourceRoot":"","sources":["../../third_part1.ts","../../../../first_part1.ts","../../../../first_part2.ts","../../../../first_part3.ts","../../../../second/second_part1.ts","../../../../second/second_part2.ts"],"names":[],"mappings":"DCGD,IAAM,CAAC,GAAG,cAAc,CAAC;DAMzB,OAAO,CAAC,GAAG,CAAC,CAAC,CAAC,CAAC;DCVf,OAAO,CAAC,GAAG,CAAC,CAAC,EAAE,CAAC,CAAC;DCAjB;GACI,OAAO,gBAAgB,CAAC;DAC5B,CAAC;;DCED,IAAU,CAAC,CAMV;DAND,WAAU,CAAC;GACP;OACI,OAAO,CAAC,GAAG,CAAC,SAAS,CAAC,CAAC;GAC3B,CAAC;GAED,CAAC,EAAE,CAAC;DACR,CAAC,EANS,CAAC,KAAD,CAAC,QAMV;DCVD;GAAA;GAIA,CAAC;GAHG,uBAAW,GAAX;OACI,OAAO,CAAC,GAAG,CAAC,oBAAoB,CAAC,CAAC;GACtC,CAAC;GACL,QAAC;DAAD,CAAC,AAJD,IAIC;;;ALHA,IAAI,CAAC,GAAG,IAAI,CAAC,EAAE,CAAC;AAChB,CAAC,CAAC,WAAW,EAAE,CAAC"}
\ No newline at end of file
diff --git a/tests/baselines/reference/thisTag1.symbols b/tests/baselines/reference/thisTag1.symbols
new file mode 100644
index 0000000000000..473a80be70f57
--- /dev/null
+++ b/tests/baselines/reference/thisTag1.symbols
@@ -0,0 +1,32 @@
+=== tests/cases/conformance/jsdoc/a.js ===
+/** @this {{ n: number }} Mount Holyoke Preparatory School
+ * @param {string} s
+ * @return {number}
+ */
+function f(s) {
+>f : Symbol(f, Decl(a.js, 0, 0))
+>s : Symbol(s, Decl(a.js, 4, 11))
+
+    return this.n + s.length
+>this.n : Symbol(n, Decl(a.js, 0, 12))
+>this : Symbol(__type, Decl(a.js, 0, 11))
+>n : Symbol(n, Decl(a.js, 0, 12))
+>s.length : Symbol(String.length, Decl(lib.es5.d.ts, --, --))
+>s : Symbol(s, Decl(a.js, 4, 11))
+>length : Symbol(String.length, Decl(lib.es5.d.ts, --, --))
+}
+
+const o = {
+>o : Symbol(o, Decl(a.js, 8, 5))
+
+    f,
+>f : Symbol(f, Decl(a.js, 8, 11))
+
+    n: 1
+>n : Symbol(n, Decl(a.js, 9, 6))
+}
+o.f('hi')
+>o.f : Symbol(f, Decl(a.js, 8, 11))
+>o : Symbol(o, Decl(a.js, 8, 5))
+>f : Symbol(f, Decl(a.js, 8, 11))
+
diff --git a/tests/baselines/reference/thisTag1.types b/tests/baselines/reference/thisTag1.types
new file mode 100644
index 0000000000000..1ef6ae8d28f5a
--- /dev/null
+++ b/tests/baselines/reference/thisTag1.types
@@ -0,0 +1,37 @@
+=== tests/cases/conformance/jsdoc/a.js ===
+/** @this {{ n: number }} Mount Holyoke Preparatory School
+ * @param {string} s
+ * @return {number}
+ */
+function f(s) {
+>f : (s: string) => number
+>s : string
+
+    return this.n + s.length
+>this.n + s.length : number
+>this.n : number
+>this : { n: number; }
+>n : number
+>s.length : number
+>s : string
+>length : number
+}
+
+const o = {
+>o : { [x: string]: any; f: (s: string) => number; n: number; }
+>{    f,    n: 1} : { [x: string]: any; f: (s: string) => number; n: number; }
+
+    f,
+>f : (s: string) => number
+
+    n: 1
+>n : number
+>1 : 1
+}
+o.f('hi')
+>o.f('hi') : number
+>o.f : (s: string) => number
+>o : { [x: string]: any; f: (s: string) => number; n: number; }
+>f : (s: string) => number
+>'hi' : "hi"
+
diff --git a/tests/baselines/reference/tsConfig/Default initialized TSConfig/tsconfig.json b/tests/baselines/reference/tsConfig/Default initialized TSConfig/tsconfig.json
index 0b72c3fd8a779..261cdca7011c3 100644
--- a/tests/baselines/reference/tsConfig/Default initialized TSConfig/tsconfig.json	
+++ b/tests/baselines/reference/tsConfig/Default initialized TSConfig/tsconfig.json	
@@ -47,8 +47,8 @@
     // "preserveSymlinks": true,              /* Do not resolve the real path of symlinks. */
 
     /* Source Map Options */
-    // "sourceRoot": "./",                    /* Specify the location where debugger should locate TypeScript files instead of source locations. */
-    // "mapRoot": "./",                       /* Specify the location where debugger should locate map files instead of generated locations. */
+    // "sourceRoot": "",                      /* Specify the location where debugger should locate TypeScript files instead of source locations. */
+    // "mapRoot": "",                         /* Specify the location where debugger should locate map files instead of generated locations. */
     // "inlineSourceMap": true,               /* Emit a single file with source maps instead of having a separate file. */
     // "inlineSources": true,                 /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */
 
diff --git a/tests/baselines/reference/tsConfig/Initialized TSConfig with advanced options/tsconfig.json b/tests/baselines/reference/tsConfig/Initialized TSConfig with advanced options/tsconfig.json
index 4d5c6053bcc76..d3a9f8e9f4708 100644
--- a/tests/baselines/reference/tsConfig/Initialized TSConfig with advanced options/tsconfig.json	
+++ b/tests/baselines/reference/tsConfig/Initialized TSConfig with advanced options/tsconfig.json	
@@ -47,8 +47,8 @@
     // "preserveSymlinks": true,              /* Do not resolve the real path of symlinks. */
 
     /* Source Map Options */
-    // "sourceRoot": "./",                    /* Specify the location where debugger should locate TypeScript files instead of source locations. */
-    // "mapRoot": "./",                       /* Specify the location where debugger should locate map files instead of generated locations. */
+    // "sourceRoot": "",                      /* Specify the location where debugger should locate TypeScript files instead of source locations. */
+    // "mapRoot": "",                         /* Specify the location where debugger should locate map files instead of generated locations. */
     // "inlineSourceMap": true,               /* Emit a single file with source maps instead of having a separate file. */
     // "inlineSources": true,                 /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */
 
diff --git a/tests/baselines/reference/tsConfig/Initialized TSConfig with boolean value compiler options/tsconfig.json b/tests/baselines/reference/tsConfig/Initialized TSConfig with boolean value compiler options/tsconfig.json
index f84c7f3abf3f2..8484e61bcfadd 100644
--- a/tests/baselines/reference/tsConfig/Initialized TSConfig with boolean value compiler options/tsconfig.json	
+++ b/tests/baselines/reference/tsConfig/Initialized TSConfig with boolean value compiler options/tsconfig.json	
@@ -47,8 +47,8 @@
     // "preserveSymlinks": true,              /* Do not resolve the real path of symlinks. */
 
     /* Source Map Options */
-    // "sourceRoot": "./",                    /* Specify the location where debugger should locate TypeScript files instead of source locations. */
-    // "mapRoot": "./",                       /* Specify the location where debugger should locate map files instead of generated locations. */
+    // "sourceRoot": "",                      /* Specify the location where debugger should locate TypeScript files instead of source locations. */
+    // "mapRoot": "",                         /* Specify the location where debugger should locate map files instead of generated locations. */
     // "inlineSourceMap": true,               /* Emit a single file with source maps instead of having a separate file. */
     // "inlineSources": true,                 /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */
 
diff --git a/tests/baselines/reference/tsConfig/Initialized TSConfig with enum value compiler options/tsconfig.json b/tests/baselines/reference/tsConfig/Initialized TSConfig with enum value compiler options/tsconfig.json
index b65582c7841d2..35aa1cf7eab87 100644
--- a/tests/baselines/reference/tsConfig/Initialized TSConfig with enum value compiler options/tsconfig.json	
+++ b/tests/baselines/reference/tsConfig/Initialized TSConfig with enum value compiler options/tsconfig.json	
@@ -47,8 +47,8 @@
     // "preserveSymlinks": true,              /* Do not resolve the real path of symlinks. */
 
     /* Source Map Options */
-    // "sourceRoot": "./",                    /* Specify the location where debugger should locate TypeScript files instead of source locations. */
-    // "mapRoot": "./",                       /* Specify the location where debugger should locate map files instead of generated locations. */
+    // "sourceRoot": "",                      /* Specify the location where debugger should locate TypeScript files instead of source locations. */
+    // "mapRoot": "",                         /* Specify the location where debugger should locate map files instead of generated locations. */
     // "inlineSourceMap": true,               /* Emit a single file with source maps instead of having a separate file. */
     // "inlineSources": true,                 /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */
 
diff --git a/tests/baselines/reference/tsConfig/Initialized TSConfig with files options/tsconfig.json b/tests/baselines/reference/tsConfig/Initialized TSConfig with files options/tsconfig.json
index 86d25e2362ac7..fbc441b823ce4 100644
--- a/tests/baselines/reference/tsConfig/Initialized TSConfig with files options/tsconfig.json	
+++ b/tests/baselines/reference/tsConfig/Initialized TSConfig with files options/tsconfig.json	
@@ -47,8 +47,8 @@
     // "preserveSymlinks": true,              /* Do not resolve the real path of symlinks. */
 
     /* Source Map Options */
-    // "sourceRoot": "./",                    /* Specify the location where debugger should locate TypeScript files instead of source locations. */
-    // "mapRoot": "./",                       /* Specify the location where debugger should locate map files instead of generated locations. */
+    // "sourceRoot": "",                      /* Specify the location where debugger should locate TypeScript files instead of source locations. */
+    // "mapRoot": "",                         /* Specify the location where debugger should locate map files instead of generated locations. */
     // "inlineSourceMap": true,               /* Emit a single file with source maps instead of having a separate file. */
     // "inlineSources": true,                 /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */
 
diff --git a/tests/baselines/reference/tsConfig/Initialized TSConfig with incorrect compiler option value/tsconfig.json b/tests/baselines/reference/tsConfig/Initialized TSConfig with incorrect compiler option value/tsconfig.json
index b623b1198c232..f758c1f6c20e4 100644
--- a/tests/baselines/reference/tsConfig/Initialized TSConfig with incorrect compiler option value/tsconfig.json	
+++ b/tests/baselines/reference/tsConfig/Initialized TSConfig with incorrect compiler option value/tsconfig.json	
@@ -47,8 +47,8 @@
     // "preserveSymlinks": true,              /* Do not resolve the real path of symlinks. */
 
     /* Source Map Options */
-    // "sourceRoot": "./",                    /* Specify the location where debugger should locate TypeScript files instead of source locations. */
-    // "mapRoot": "./",                       /* Specify the location where debugger should locate map files instead of generated locations. */
+    // "sourceRoot": "",                      /* Specify the location where debugger should locate TypeScript files instead of source locations. */
+    // "mapRoot": "",                         /* Specify the location where debugger should locate map files instead of generated locations. */
     // "inlineSourceMap": true,               /* Emit a single file with source maps instead of having a separate file. */
     // "inlineSources": true,                 /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */
 
diff --git a/tests/baselines/reference/tsConfig/Initialized TSConfig with incorrect compiler option/tsconfig.json b/tests/baselines/reference/tsConfig/Initialized TSConfig with incorrect compiler option/tsconfig.json
index 0b72c3fd8a779..261cdca7011c3 100644
--- a/tests/baselines/reference/tsConfig/Initialized TSConfig with incorrect compiler option/tsconfig.json	
+++ b/tests/baselines/reference/tsConfig/Initialized TSConfig with incorrect compiler option/tsconfig.json	
@@ -47,8 +47,8 @@
     // "preserveSymlinks": true,              /* Do not resolve the real path of symlinks. */
 
     /* Source Map Options */
-    // "sourceRoot": "./",                    /* Specify the location where debugger should locate TypeScript files instead of source locations. */
-    // "mapRoot": "./",                       /* Specify the location where debugger should locate map files instead of generated locations. */
+    // "sourceRoot": "",                      /* Specify the location where debugger should locate TypeScript files instead of source locations. */
+    // "mapRoot": "",                         /* Specify the location where debugger should locate map files instead of generated locations. */
     // "inlineSourceMap": true,               /* Emit a single file with source maps instead of having a separate file. */
     // "inlineSources": true,                 /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */
 
diff --git a/tests/baselines/reference/tsConfig/Initialized TSConfig with list compiler options with enum value/tsconfig.json b/tests/baselines/reference/tsConfig/Initialized TSConfig with list compiler options with enum value/tsconfig.json
index ea9df560138df..cdb52963ccb2f 100644
--- a/tests/baselines/reference/tsConfig/Initialized TSConfig with list compiler options with enum value/tsconfig.json	
+++ b/tests/baselines/reference/tsConfig/Initialized TSConfig with list compiler options with enum value/tsconfig.json	
@@ -47,8 +47,8 @@
     // "preserveSymlinks": true,              /* Do not resolve the real path of symlinks. */
 
     /* Source Map Options */
-    // "sourceRoot": "./",                    /* Specify the location where debugger should locate TypeScript files instead of source locations. */
-    // "mapRoot": "./",                       /* Specify the location where debugger should locate map files instead of generated locations. */
+    // "sourceRoot": "",                      /* Specify the location where debugger should locate TypeScript files instead of source locations. */
+    // "mapRoot": "",                         /* Specify the location where debugger should locate map files instead of generated locations. */
     // "inlineSourceMap": true,               /* Emit a single file with source maps instead of having a separate file. */
     // "inlineSources": true,                 /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */
 
diff --git a/tests/baselines/reference/tsConfig/Initialized TSConfig with list compiler options/tsconfig.json b/tests/baselines/reference/tsConfig/Initialized TSConfig with list compiler options/tsconfig.json
index bab4947a8e51b..fd6419e1e3531 100644
--- a/tests/baselines/reference/tsConfig/Initialized TSConfig with list compiler options/tsconfig.json	
+++ b/tests/baselines/reference/tsConfig/Initialized TSConfig with list compiler options/tsconfig.json	
@@ -47,8 +47,8 @@
     // "preserveSymlinks": true,              /* Do not resolve the real path of symlinks. */
 
     /* Source Map Options */
-    // "sourceRoot": "./",                    /* Specify the location where debugger should locate TypeScript files instead of source locations. */
-    // "mapRoot": "./",                       /* Specify the location where debugger should locate map files instead of generated locations. */
+    // "sourceRoot": "",                      /* Specify the location where debugger should locate TypeScript files instead of source locations. */
+    // "mapRoot": "",                         /* Specify the location where debugger should locate map files instead of generated locations. */
     // "inlineSourceMap": true,               /* Emit a single file with source maps instead of having a separate file. */
     // "inlineSources": true,                 /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */
 
diff --git a/tests/baselines/reference/typeFromPropertyAssignment10.types b/tests/baselines/reference/typeFromPropertyAssignment10.types
index a880498f047c7..86c525ac96174 100644
--- a/tests/baselines/reference/typeFromPropertyAssignment10.types
+++ b/tests/baselines/reference/typeFromPropertyAssignment10.types
@@ -1,28 +1,28 @@
 === tests/cases/conformance/salsa/module.js ===
 var Outer = Outer || {};
->Outer : { [x: string]: any; app: { [x: string]: any; SomeView: () => void; Inner: typeof Inner; statische(k: number): number; Application: () => void; }; }
->Outer || {} : { [x: string]: any; app: { [x: string]: any; SomeView: () => void; Inner: typeof Inner; statische(k: number): number; Application: () => void; }; }
->Outer : { [x: string]: any; app: { [x: string]: any; SomeView: () => void; Inner: typeof Inner; statische(k: number): number; Application: () => void; }; }
->{} : { [x: string]: any; app: { [x: string]: any; SomeView: () => void; Inner: typeof Inner; statische(k: number): number; Application: () => void; }; }
+>Outer : typeof Outer
+>Outer || {} : typeof Outer | { [x: string]: any; }
+>Outer : typeof Outer
+>{} : { [x: string]: any; }
 
 Outer.app = Outer.app || {};
->Outer.app = Outer.app || {} : { [x: string]: any; SomeView: () => void; Inner: typeof Inner; statische(k: number): number; Application: () => void; }
->Outer.app : { [x: string]: any; SomeView: () => void; Inner: typeof Inner; statische(k: number): number; Application: () => void; }
->Outer : { [x: string]: any; app: { [x: string]: any; SomeView: () => void; Inner: typeof Inner; statische(k: number): number; Application: () => void; }; }
->app : { [x: string]: any; SomeView: () => void; Inner: typeof Inner; statische(k: number): number; Application: () => void; }
->Outer.app || {} : { [x: string]: any; SomeView: () => void; Inner: typeof Inner; statische(k: number): number; Application: () => void; }
->Outer.app : { [x: string]: any; SomeView: () => void; Inner: typeof Inner; statische(k: number): number; Application: () => void; }
->Outer : { [x: string]: any; app: { [x: string]: any; SomeView: () => void; Inner: typeof Inner; statische(k: number): number; Application: () => void; }; }
->app : { [x: string]: any; SomeView: () => void; Inner: typeof Inner; statische(k: number): number; Application: () => void; }
->{} : { [x: string]: any; SomeView: () => void; Inner: typeof Inner; statische(k: number): number; Application: () => void; }
+>Outer.app = Outer.app || {} : typeof Outer.app
+>Outer.app : typeof Outer.app
+>Outer : typeof Outer
+>app : typeof Outer.app
+>Outer.app || {} : { [x: string]: any; }
+>Outer.app : typeof Outer.app
+>Outer : typeof Outer
+>app : typeof Outer.app
+>{} : { [x: string]: any; }
 
 === tests/cases/conformance/salsa/someview.js ===
 Outer.app.SomeView = (function () {
 >Outer.app.SomeView = (function () {    var SomeView = function() {        var me = this;    }    return SomeView;})() : () => void
 >Outer.app.SomeView : () => void
->Outer.app : { [x: string]: any; SomeView: () => void; Inner: typeof Inner; statische(k: number): number; Application: () => void; }
->Outer : { [x: string]: any; app: { [x: string]: any; SomeView: () => void; Inner: typeof Inner; statische(k: number): number; Application: () => void; }; }
->app : { [x: string]: any; SomeView: () => void; Inner: typeof Inner; statische(k: number): number; Application: () => void; }
+>Outer.app : typeof Outer.app
+>Outer : typeof Outer
+>app : typeof Outer.app
 >SomeView : () => void
 >(function () {    var SomeView = function() {        var me = this;    }    return SomeView;})() : () => void
 >(function () {    var SomeView = function() {        var me = this;    }    return SomeView;}) : () => () => void
@@ -43,9 +43,9 @@ Outer.app.SomeView = (function () {
 Outer.app.Inner = class {
 >Outer.app.Inner = class {    constructor() {        /** @type {number} */        this.y = 12;    }} : typeof Inner
 >Outer.app.Inner : typeof Inner
->Outer.app : { [x: string]: any; SomeView: () => void; Inner: typeof Inner; statische(k: number): number; Application: () => void; }
->Outer : { [x: string]: any; app: { [x: string]: any; SomeView: () => void; Inner: typeof Inner; statische(k: number): number; Application: () => void; }; }
->app : { [x: string]: any; SomeView: () => void; Inner: typeof Inner; statische(k: number): number; Application: () => void; }
+>Outer.app : typeof Outer.app
+>Outer : typeof Outer
+>app : typeof Outer.app
 >Inner : typeof Inner
 >class {    constructor() {        /** @type {number} */        this.y = 12;    }} : typeof Inner
 
@@ -63,9 +63,9 @@ var example = new Outer.app.Inner();
 >example : Inner
 >new Outer.app.Inner() : Inner
 >Outer.app.Inner : typeof Inner
->Outer.app : { [x: string]: any; SomeView: () => void; Inner: typeof Inner; statische(k: number): number; Application: () => void; }
->Outer : { [x: string]: any; app: { [x: string]: any; SomeView: () => void; Inner: typeof Inner; statische(k: number): number; Application: () => void; }; }
->app : { [x: string]: any; SomeView: () => void; Inner: typeof Inner; statische(k: number): number; Application: () => void; }
+>Outer.app : typeof Outer.app
+>Outer : typeof Outer
+>app : typeof Outer.app
 >Inner : typeof Inner
 
 example.y;
@@ -77,9 +77,9 @@ example.y;
 Outer.app.statische = function (k) {
 >Outer.app.statische = function (k) {    return k ** k;} : (k: number) => number
 >Outer.app.statische : (k: number) => number
->Outer.app : { [x: string]: any; SomeView: () => void; Inner: typeof Inner; statische(k: number): number; Application: () => void; }
->Outer : { [x: string]: any; app: { [x: string]: any; SomeView: () => void; Inner: typeof Inner; statische(k: number): number; Application: () => void; }; }
->app : { [x: string]: any; SomeView: () => void; Inner: typeof Inner; statische(k: number): number; Application: () => void; }
+>Outer.app : typeof Outer.app
+>Outer : typeof Outer
+>app : typeof Outer.app
 >statische : (k: number) => number
 >function (k) {    return k ** k;} : (k: number) => number
 >k : number
@@ -93,9 +93,9 @@ Outer.app.statische = function (k) {
 Outer.app.Application = (function () {
 >Outer.app.Application = (function () {    /**     * Application main class.     * Will be instantiated & initialized by HTML page     */    var Application = function () {        var me = this;        me.view = new Outer.app.SomeView();    };    return Application;})() : () => void
 >Outer.app.Application : () => void
->Outer.app : { [x: string]: any; SomeView: () => void; Inner: typeof Inner; statische(k: number): number; Application: () => void; }
->Outer : { [x: string]: any; app: { [x: string]: any; SomeView: () => void; Inner: typeof Inner; statische(k: number): number; Application: () => void; }; }
->app : { [x: string]: any; SomeView: () => void; Inner: typeof Inner; statische(k: number): number; Application: () => void; }
+>Outer.app : typeof Outer.app
+>Outer : typeof Outer
+>app : typeof Outer.app
 >Application : () => void
 >(function () {    /**     * Application main class.     * Will be instantiated & initialized by HTML page     */    var Application = function () {        var me = this;        me.view = new Outer.app.SomeView();    };    return Application;})() : () => void
 >(function () {    /**     * Application main class.     * Will be instantiated & initialized by HTML page     */    var Application = function () {        var me = this;        me.view = new Outer.app.SomeView();    };    return Application;}) : () => () => void
@@ -120,9 +120,9 @@ Outer.app.Application = (function () {
 >view : any
 >new Outer.app.SomeView() : any
 >Outer.app.SomeView : () => void
->Outer.app : { [x: string]: any; SomeView: () => void; Inner: typeof Inner; statische(k: number): number; Application: () => void; }
->Outer : { [x: string]: any; app: { [x: string]: any; SomeView: () => void; Inner: typeof Inner; statische(k: number): number; Application: () => void; }; }
->app : { [x: string]: any; SomeView: () => void; Inner: typeof Inner; statische(k: number): number; Application: () => void; }
+>Outer.app : typeof Outer.app
+>Outer : typeof Outer
+>app : typeof Outer.app
 >SomeView : () => void
 
     };
@@ -135,18 +135,18 @@ var app = new Outer.app.Application();
 >app : any
 >new Outer.app.Application() : any
 >Outer.app.Application : () => void
->Outer.app : { [x: string]: any; SomeView: () => void; Inner: typeof Inner; statische(k: number): number; Application: () => void; }
->Outer : { [x: string]: any; app: { [x: string]: any; SomeView: () => void; Inner: typeof Inner; statische(k: number): number; Application: () => void; }; }
->app : { [x: string]: any; SomeView: () => void; Inner: typeof Inner; statische(k: number): number; Application: () => void; }
+>Outer.app : typeof Outer.app
+>Outer : typeof Outer
+>app : typeof Outer.app
 >Application : () => void
 
 var inner = new Outer.app.Inner();
 >inner : Inner
 >new Outer.app.Inner() : Inner
 >Outer.app.Inner : typeof Inner
->Outer.app : { [x: string]: any; SomeView: () => void; Inner: typeof Inner; statische(k: number): number; Application: () => void; }
->Outer : { [x: string]: any; app: { [x: string]: any; SomeView: () => void; Inner: typeof Inner; statische(k: number): number; Application: () => void; }; }
->app : { [x: string]: any; SomeView: () => void; Inner: typeof Inner; statische(k: number): number; Application: () => void; }
+>Outer.app : typeof Outer.app
+>Outer : typeof Outer
+>app : typeof Outer.app
 >Inner : typeof Inner
 
 inner.y;
@@ -166,9 +166,9 @@ x.y;
 Outer.app.statische(101); // Infinity, duh
 >Outer.app.statische(101) : number
 >Outer.app.statische : (k: number) => number
->Outer.app : { [x: string]: any; SomeView: () => void; Inner: typeof Inner; statische(k: number): number; Application: () => void; }
->Outer : { [x: string]: any; app: { [x: string]: any; SomeView: () => void; Inner: typeof Inner; statische(k: number): number; Application: () => void; }; }
->app : { [x: string]: any; SomeView: () => void; Inner: typeof Inner; statische(k: number): number; Application: () => void; }
+>Outer.app : typeof Outer.app
+>Outer : typeof Outer
+>app : typeof Outer.app
 >statische : (k: number) => number
 >101 : 101
 
diff --git a/tests/baselines/reference/typeFromPropertyAssignment11.types b/tests/baselines/reference/typeFromPropertyAssignment11.types
index 8c90e824f23c5..87a709d7cf3a4 100644
--- a/tests/baselines/reference/typeFromPropertyAssignment11.types
+++ b/tests/baselines/reference/typeFromPropertyAssignment11.types
@@ -5,9 +5,9 @@ var Inner = function() {}
 
 Inner.prototype = {
 >Inner.prototype = {    m() { },    i: 1} : { [x: string]: any; m(): void; i: number; }
->Inner.prototype : { [x: string]: any; m(): void; i: number; }
+>Inner.prototype : { [x: string]: any; }
 >Inner : typeof Inner
->prototype : { [x: string]: any; m(): void; i: number; }
+>prototype : { [x: string]: any; }
 >{    m() { },    i: 1} : { [x: string]: any; m(): void; i: number; }
 
     m() { },
@@ -21,18 +21,18 @@ Inner.prototype = {
 Inner.prototype.j = 2
 >Inner.prototype.j = 2 : 2
 >Inner.prototype.j : any
->Inner.prototype : { [x: string]: any; m(): void; i: number; }
+>Inner.prototype : { [x: string]: any; }
 >Inner : typeof Inner
->prototype : { [x: string]: any; m(): void; i: number; }
+>prototype : { [x: string]: any; }
 >j : any
 >2 : 2
 
 /** @type {string} */
 Inner.prototype.k;
 >Inner.prototype.k : any
->Inner.prototype : { [x: string]: any; m(): void; i: number; }
+>Inner.prototype : { [x: string]: any; }
 >Inner : typeof Inner
->prototype : { [x: string]: any; m(): void; i: number; }
+>prototype : { [x: string]: any; }
 >k : any
 
 var inner = new Inner()
diff --git a/tests/baselines/reference/typeFromPropertyAssignment13.types b/tests/baselines/reference/typeFromPropertyAssignment13.types
index c5370aebc5659..5b97d2986f57c 100644
--- a/tests/baselines/reference/typeFromPropertyAssignment13.types
+++ b/tests/baselines/reference/typeFromPropertyAssignment13.types
@@ -1,22 +1,22 @@
 === tests/cases/conformance/salsa/module.js ===
 var Outer = {}
->Outer : { [x: string]: any; Inner: typeof Inner; }
->{} : { [x: string]: any; Inner: typeof Inner; }
+>Outer : typeof Outer
+>{} : { [x: string]: any; }
 
 Outer.Inner = function() {}
 >Outer.Inner = function() {} : typeof Inner
 >Outer.Inner : typeof Inner
->Outer : { [x: string]: any; Inner: typeof Inner; }
+>Outer : typeof Outer
 >Inner : typeof Inner
 >function() {} : typeof Inner
 
 Outer.Inner.prototype = {
 >Outer.Inner.prototype = {    m() { },    i: 1} : { [x: string]: any; m(): void; i: number; }
->Outer.Inner.prototype : { [x: string]: any; m(): void; i: number; }
+>Outer.Inner.prototype : { [x: string]: any; }
 >Outer.Inner : typeof Inner
->Outer : { [x: string]: any; Inner: typeof Inner; }
+>Outer : typeof Outer
 >Inner : typeof Inner
->prototype : { [x: string]: any; m(): void; i: number; }
+>prototype : { [x: string]: any; }
 >{    m() { },    i: 1} : { [x: string]: any; m(): void; i: number; }
 
     m() { },
@@ -30,29 +30,29 @@ Outer.Inner.prototype = {
 Outer.Inner.prototype.j = 2
 >Outer.Inner.prototype.j = 2 : 2
 >Outer.Inner.prototype.j : any
->Outer.Inner.prototype : { [x: string]: any; m(): void; i: number; }
+>Outer.Inner.prototype : { [x: string]: any; }
 >Outer.Inner : typeof Inner
->Outer : { [x: string]: any; Inner: typeof Inner; }
+>Outer : typeof Outer
 >Inner : typeof Inner
->prototype : { [x: string]: any; m(): void; i: number; }
+>prototype : { [x: string]: any; }
 >j : any
 >2 : 2
 
 /** @type {string} */
 Outer.Inner.prototype.k;
 >Outer.Inner.prototype.k : any
->Outer.Inner.prototype : { [x: string]: any; m(): void; i: number; }
+>Outer.Inner.prototype : { [x: string]: any; }
 >Outer.Inner : typeof Inner
->Outer : { [x: string]: any; Inner: typeof Inner; }
+>Outer : typeof Outer
 >Inner : typeof Inner
->prototype : { [x: string]: any; m(): void; i: number; }
+>prototype : { [x: string]: any; }
 >k : any
 
 var inner = new Outer.Inner()
 >inner : Inner & { [x: string]: any; m(): void; i: number; }
 >new Outer.Inner() : Inner & { [x: string]: any; m(): void; i: number; }
 >Outer.Inner : typeof Inner
->Outer : { [x: string]: any; Inner: typeof Inner; }
+>Outer : typeof Outer
 >Inner : typeof Inner
 
 inner.m()
diff --git a/tests/baselines/reference/typeFromPropertyAssignment14.types b/tests/baselines/reference/typeFromPropertyAssignment14.types
index 65838ccacc18f..60d63c489d6b3 100644
--- a/tests/baselines/reference/typeFromPropertyAssignment14.types
+++ b/tests/baselines/reference/typeFromPropertyAssignment14.types
@@ -1,23 +1,23 @@
 === tests/cases/conformance/salsa/def.js ===
 var Outer = {};
->Outer : { [x: string]: any; Inner: { (): void; prototype: { [x: string]: any; x: number; m(): void; }; }; }
->{} : { [x: string]: any; Inner: { (): void; prototype: { [x: string]: any; x: number; m(): void; }; }; }
+>Outer : typeof Outer
+>{} : { [x: string]: any; }
 
 === tests/cases/conformance/salsa/work.js ===
 Outer.Inner = function () {}
->Outer.Inner = function () {} : { (): void; prototype: { [x: string]: any; x: number; m(): void; }; }
->Outer.Inner : { (): void; prototype: { [x: string]: any; x: number; m(): void; }; }
->Outer : { [x: string]: any; Inner: { (): void; prototype: { [x: string]: any; x: number; m(): void; }; }; }
->Inner : { (): void; prototype: { [x: string]: any; x: number; m(): void; }; }
->function () {} : { (): void; prototype: { [x: string]: any; x: number; m(): void; }; }
+>Outer.Inner = function () {} : { (): void; prototype: { [x: string]: any; }; }
+>Outer.Inner : { (): void; prototype: { [x: string]: any; }; }
+>Outer : typeof Outer
+>Inner : { (): void; prototype: { [x: string]: any; }; }
+>function () {} : { (): void; prototype: { [x: string]: any; }; }
 
 Outer.Inner.prototype = {
 >Outer.Inner.prototype = {    x: 1,    m() { }} : { [x: string]: any; x: number; m(): void; }
->Outer.Inner.prototype : { [x: string]: any; x: number; m(): void; }
->Outer.Inner : { (): void; prototype: { [x: string]: any; x: number; m(): void; }; }
->Outer : { [x: string]: any; Inner: { (): void; prototype: { [x: string]: any; x: number; m(): void; }; }; }
->Inner : { (): void; prototype: { [x: string]: any; x: number; m(): void; }; }
->prototype : { [x: string]: any; x: number; m(): void; }
+>Outer.Inner.prototype : { [x: string]: any; }
+>Outer.Inner : { (): void; prototype: { [x: string]: any; }; }
+>Outer : typeof Outer
+>Inner : { (): void; prototype: { [x: string]: any; }; }
+>prototype : { [x: string]: any; }
 >{    x: 1,    m() { }} : { [x: string]: any; x: number; m(): void; }
 
     x: 1,
@@ -47,9 +47,9 @@ inner.m()
 var inno = new Outer.Inner()
 >inno : { [x: string]: any; x: number; m(): void; }
 >new Outer.Inner() : { [x: string]: any; x: number; m(): void; }
->Outer.Inner : { (): void; prototype: { [x: string]: any; x: number; m(): void; }; }
->Outer : { [x: string]: any; Inner: { (): void; prototype: { [x: string]: any; x: number; m(): void; }; }; }
->Inner : { (): void; prototype: { [x: string]: any; x: number; m(): void; }; }
+>Outer.Inner : { (): void; prototype: { [x: string]: any; }; }
+>Outer : typeof Outer
+>Inner : { (): void; prototype: { [x: string]: any; }; }
 
 inno.x
 >inno.x : number
diff --git a/tests/baselines/reference/typeFromPropertyAssignment15.types b/tests/baselines/reference/typeFromPropertyAssignment15.types
index afb1ea779f0eb..8731d8dee4e19 100644
--- a/tests/baselines/reference/typeFromPropertyAssignment15.types
+++ b/tests/baselines/reference/typeFromPropertyAssignment15.types
@@ -1,12 +1,12 @@
 === tests/cases/conformance/salsa/a.js ===
 var Outer = {};
->Outer : { [x: string]: any; Inner: typeof Inner; }
->{} : { [x: string]: any; Inner: typeof Inner; }
+>Outer : typeof Outer
+>{} : { [x: string]: any; }
 
 Outer.Inner = class {
 >Outer.Inner = class {    constructor() {        this.x = 1    }    m() { }} : typeof Inner
 >Outer.Inner : typeof Inner
->Outer : { [x: string]: any; Inner: typeof Inner; }
+>Outer : typeof Outer
 >Inner : typeof Inner
 >class {    constructor() {        this.x = 1    }    m() { }} : typeof Inner
 
@@ -41,7 +41,7 @@ var inno = new Outer.Inner()
 >inno : Inner
 >new Outer.Inner() : Inner
 >Outer.Inner : typeof Inner
->Outer : { [x: string]: any; Inner: typeof Inner; }
+>Outer : typeof Outer
 >Inner : typeof Inner
 
 inno.x
diff --git a/tests/baselines/reference/typeFromPropertyAssignment16.types b/tests/baselines/reference/typeFromPropertyAssignment16.types
index 76076e74d9333..d67d6ccca3763 100644
--- a/tests/baselines/reference/typeFromPropertyAssignment16.types
+++ b/tests/baselines/reference/typeFromPropertyAssignment16.types
@@ -1,22 +1,22 @@
 === tests/cases/conformance/salsa/a.js ===
 var Outer = {};
->Outer : { [x: string]: any; Inner: { (): void; prototype: { [x: string]: any; x: number; m(): void; }; }; }
->{} : { [x: string]: any; Inner: { (): void; prototype: { [x: string]: any; x: number; m(): void; }; }; }
+>Outer : typeof Outer
+>{} : { [x: string]: any; }
 
 Outer.Inner = function () {}
->Outer.Inner = function () {} : { (): void; prototype: { [x: string]: any; x: number; m(): void; }; }
->Outer.Inner : { (): void; prototype: { [x: string]: any; x: number; m(): void; }; }
->Outer : { [x: string]: any; Inner: { (): void; prototype: { [x: string]: any; x: number; m(): void; }; }; }
->Inner : { (): void; prototype: { [x: string]: any; x: number; m(): void; }; }
->function () {} : { (): void; prototype: { [x: string]: any; x: number; m(): void; }; }
+>Outer.Inner = function () {} : { (): void; prototype: { [x: string]: any; }; }
+>Outer.Inner : { (): void; prototype: { [x: string]: any; }; }
+>Outer : typeof Outer
+>Inner : { (): void; prototype: { [x: string]: any; }; }
+>function () {} : { (): void; prototype: { [x: string]: any; }; }
 
 Outer.Inner.prototype = {
 >Outer.Inner.prototype = {    x: 1,    m() { }} : { [x: string]: any; x: number; m(): void; }
->Outer.Inner.prototype : { [x: string]: any; x: number; m(): void; }
->Outer.Inner : { (): void; prototype: { [x: string]: any; x: number; m(): void; }; }
->Outer : { [x: string]: any; Inner: { (): void; prototype: { [x: string]: any; x: number; m(): void; }; }; }
->Inner : { (): void; prototype: { [x: string]: any; x: number; m(): void; }; }
->prototype : { [x: string]: any; x: number; m(): void; }
+>Outer.Inner.prototype : { [x: string]: any; }
+>Outer.Inner : { (): void; prototype: { [x: string]: any; }; }
+>Outer : typeof Outer
+>Inner : { (): void; prototype: { [x: string]: any; }; }
+>prototype : { [x: string]: any; }
 >{    x: 1,    m() { }} : { [x: string]: any; x: number; m(): void; }
 
     x: 1,
@@ -45,9 +45,9 @@ inner.m()
 var inno = new Outer.Inner()
 >inno : { [x: string]: any; x: number; m(): void; }
 >new Outer.Inner() : { [x: string]: any; x: number; m(): void; }
->Outer.Inner : { (): void; prototype: { [x: string]: any; x: number; m(): void; }; }
->Outer : { [x: string]: any; Inner: { (): void; prototype: { [x: string]: any; x: number; m(): void; }; }; }
->Inner : { (): void; prototype: { [x: string]: any; x: number; m(): void; }; }
+>Outer.Inner : { (): void; prototype: { [x: string]: any; }; }
+>Outer : typeof Outer
+>Inner : { (): void; prototype: { [x: string]: any; }; }
 
 inno.x
 >inno.x : number
diff --git a/tests/baselines/reference/typeFromPropertyAssignment18.symbols b/tests/baselines/reference/typeFromPropertyAssignment18.symbols
index 19fc0068c9189..cb74bd66d3965 100644
--- a/tests/baselines/reference/typeFromPropertyAssignment18.symbols
+++ b/tests/baselines/reference/typeFromPropertyAssignment18.symbols
@@ -9,7 +9,9 @@ function m() {
 >m : Symbol(m, Decl(a.js, 0, 30))
 }
 GLOBSTAR.p = 1
+>GLOBSTAR.p : Symbol(GLOBSTAR.p, Decl(a.js, 2, 1))
 >GLOBSTAR : Symbol(GLOBSTAR, Decl(a.js, 0, 3))
+>p : Symbol(GLOBSTAR.p, Decl(a.js, 2, 1))
 
 m.GLOBSTAR.q = 2
 >m.GLOBSTAR.q : Symbol(m.GLOBSTAR.q, Decl(a.js, 3, 14))
@@ -18,13 +20,27 @@ m.GLOBSTAR.q = 2
 >GLOBSTAR : Symbol(m.GLOBSTAR, Decl(a.js, 0, 14))
 >q : Symbol(m.GLOBSTAR.q, Decl(a.js, 3, 14))
 
+GLOBSTAR.p
+>GLOBSTAR.p : Symbol(GLOBSTAR.p, Decl(a.js, 2, 1))
+>GLOBSTAR : Symbol(GLOBSTAR, Decl(a.js, 0, 3))
+>p : Symbol(GLOBSTAR.p, Decl(a.js, 2, 1))
+
 GLOBSTAR.q
 >GLOBSTAR.q : Symbol(m.GLOBSTAR.q, Decl(a.js, 3, 14))
 >GLOBSTAR : Symbol(GLOBSTAR, Decl(a.js, 0, 3))
 >q : Symbol(m.GLOBSTAR.q, Decl(a.js, 3, 14))
 
 m.GLOBSTAR.p
+>m.GLOBSTAR.p : Symbol(GLOBSTAR.p, Decl(a.js, 2, 1))
+>m.GLOBSTAR : Symbol(m.GLOBSTAR, Decl(a.js, 0, 14))
+>m : Symbol(m, Decl(a.js, 0, 30))
+>GLOBSTAR : Symbol(m.GLOBSTAR, Decl(a.js, 0, 14))
+>p : Symbol(GLOBSTAR.p, Decl(a.js, 2, 1))
+
+m.GLOBSTAR.q
+>m.GLOBSTAR.q : Symbol(m.GLOBSTAR.q, Decl(a.js, 3, 14))
 >m.GLOBSTAR : Symbol(m.GLOBSTAR, Decl(a.js, 0, 14))
 >m : Symbol(m, Decl(a.js, 0, 30))
 >GLOBSTAR : Symbol(m.GLOBSTAR, Decl(a.js, 0, 14))
+>q : Symbol(m.GLOBSTAR.q, Decl(a.js, 3, 14))
 
diff --git a/tests/baselines/reference/typeFromPropertyAssignment18.types b/tests/baselines/reference/typeFromPropertyAssignment18.types
index 9f594379d0baf..94f859426022e 100644
--- a/tests/baselines/reference/typeFromPropertyAssignment18.types
+++ b/tests/baselines/reference/typeFromPropertyAssignment18.types
@@ -1,40 +1,52 @@
 === tests/cases/conformance/salsa/a.js ===
 var GLOBSTAR = m.GLOBSTAR = {}
->GLOBSTAR : { [x: string]: any; q: number; }
->m.GLOBSTAR = {} : { [x: string]: any; q: number; }
->m.GLOBSTAR : { [x: string]: any; q: number; }
->m : { (): void; GLOBSTAR: { [x: string]: any; q: number; }; }
->GLOBSTAR : { [x: string]: any; q: number; }
->{} : { [x: string]: any; q: number; }
+>GLOBSTAR : { [x: string]: any; q: number; p: number; }
+>m.GLOBSTAR = {} : { [x: string]: any; q: number; p: number; }
+>m.GLOBSTAR : { [x: string]: any; q: number; p: number; }
+>m : { (): void; GLOBSTAR: { [x: string]: any; q: number; p: number; }; }
+>GLOBSTAR : { [x: string]: any; q: number; p: number; }
+>{} : { [x: string]: any; }
 
 function m() {
->m : { (): void; GLOBSTAR: { [x: string]: any; q: number; }; }
+>m : { (): void; GLOBSTAR: { [x: string]: any; q: number; p: number; }; }
 }
 GLOBSTAR.p = 1
 >GLOBSTAR.p = 1 : 1
->GLOBSTAR.p : any
->GLOBSTAR : { [x: string]: any; q: number; }
->p : any
+>GLOBSTAR.p : number
+>GLOBSTAR : { [x: string]: any; q: number; p: number; }
+>p : number
 >1 : 1
 
 m.GLOBSTAR.q = 2
 >m.GLOBSTAR.q = 2 : 2
 >m.GLOBSTAR.q : number
->m.GLOBSTAR : { [x: string]: any; q: number; }
->m : { (): void; GLOBSTAR: { [x: string]: any; q: number; }; }
->GLOBSTAR : { [x: string]: any; q: number; }
+>m.GLOBSTAR : { [x: string]: any; q: number; p: number; }
+>m : { (): void; GLOBSTAR: { [x: string]: any; q: number; p: number; }; }
+>GLOBSTAR : { [x: string]: any; q: number; p: number; }
 >q : number
 >2 : 2
 
+GLOBSTAR.p
+>GLOBSTAR.p : number
+>GLOBSTAR : { [x: string]: any; q: number; p: number; }
+>p : number
+
 GLOBSTAR.q
 >GLOBSTAR.q : number
->GLOBSTAR : { [x: string]: any; q: number; }
+>GLOBSTAR : { [x: string]: any; q: number; p: number; }
 >q : number
 
 m.GLOBSTAR.p
->m.GLOBSTAR.p : any
->m.GLOBSTAR : { [x: string]: any; q: number; }
->m : { (): void; GLOBSTAR: { [x: string]: any; q: number; }; }
->GLOBSTAR : { [x: string]: any; q: number; }
->p : any
+>m.GLOBSTAR.p : number
+>m.GLOBSTAR : { [x: string]: any; q: number; p: number; }
+>m : { (): void; GLOBSTAR: { [x: string]: any; q: number; p: number; }; }
+>GLOBSTAR : { [x: string]: any; q: number; p: number; }
+>p : number
+
+m.GLOBSTAR.q
+>m.GLOBSTAR.q : number
+>m.GLOBSTAR : { [x: string]: any; q: number; p: number; }
+>m : { (): void; GLOBSTAR: { [x: string]: any; q: number; p: number; }; }
+>GLOBSTAR : { [x: string]: any; q: number; p: number; }
+>q : number
 
diff --git a/tests/baselines/reference/typeFromPropertyAssignment24.types b/tests/baselines/reference/typeFromPropertyAssignment24.types
index 5acd55568cb84..a8d1760c5ea1f 100644
--- a/tests/baselines/reference/typeFromPropertyAssignment24.types
+++ b/tests/baselines/reference/typeFromPropertyAssignment24.types
@@ -4,7 +4,7 @@ Outer.Inner.Message = function() {
 >Outer.Inner.Message = function() {} : () => void
 >Outer.Inner.Message : () => void
 >Outer.Inner : typeof Inner
->Outer : { [x: string]: any; Inner: typeof Inner; }
+>Outer : typeof Outer
 >Inner : typeof Inner
 >Message : () => void
 >function() {} : () => void
@@ -15,7 +15,7 @@ var y = new Outer.Inner()
 >y : Inner
 >new Outer.Inner() : Inner
 >Outer.Inner : typeof Inner
->Outer : { [x: string]: any; Inner: typeof Inner; }
+>Outer : typeof Outer
 >Inner : typeof Inner
 
 y.name
@@ -34,13 +34,13 @@ x.name
 
 === tests/cases/conformance/salsa/def.js ===
 var Outer = {}
->Outer : { [x: string]: any; Inner: typeof Inner; }
->{} : { [x: string]: any; Inner: typeof Inner; }
+>Outer : typeof Outer
+>{} : { [x: string]: any; }
 
 Outer.Inner = class {
 >Outer.Inner = class {  name() {    return 'hi'  }} : typeof Inner
 >Outer.Inner : typeof Inner
->Outer : { [x: string]: any; Inner: typeof Inner; }
+>Outer : typeof Outer
 >Inner : typeof Inner
 >class {  name() {    return 'hi'  }} : typeof Inner
 
diff --git a/tests/baselines/reference/typeFromPropertyAssignment25.types b/tests/baselines/reference/typeFromPropertyAssignment25.types
index e5c4a2066e7ac..13fae2c861f07 100644
--- a/tests/baselines/reference/typeFromPropertyAssignment25.types
+++ b/tests/baselines/reference/typeFromPropertyAssignment25.types
@@ -1,12 +1,12 @@
 === tests/cases/conformance/salsa/bug24703.js ===
 var Common = {};
->Common : { [x: string]: any; I: typeof I; O: typeof O; }
->{} : { [x: string]: any; I: typeof I; O: typeof O; }
+>Common : typeof Common
+>{} : { [x: string]: any; }
 
 Common.I = class {
 >Common.I = class {    constructor() {        this.i = 1    }} : typeof I
 >Common.I : typeof I
->Common : { [x: string]: any; I: typeof I; O: typeof O; }
+>Common : typeof Common
 >I : typeof I
 >class {    constructor() {        this.i = 1    }} : typeof I
 
@@ -22,11 +22,11 @@ Common.I = class {
 Common.O = class extends Common.I {
 >Common.O = class extends Common.I {    constructor() {        super()        this.o = 2    }} : typeof O
 >Common.O : typeof O
->Common : { [x: string]: any; I: typeof I; O: typeof O; }
+>Common : typeof Common
 >O : typeof O
 >class extends Common.I {    constructor() {        super()        this.o = 2    }} : typeof O
 >Common.I : I
->Common : { [x: string]: any; I: typeof I; O: typeof O; }
+>Common : typeof Common
 >I : typeof I
 
     constructor() {
@@ -46,14 +46,14 @@ var o = new Common.O()
 >o : O
 >new Common.O() : O
 >Common.O : typeof O
->Common : { [x: string]: any; I: typeof I; O: typeof O; }
+>Common : typeof Common
 >O : typeof O
 
 var i = new Common.I()
 >i : I
 >new Common.I() : I
 >Common.I : typeof I
->Common : { [x: string]: any; I: typeof I; O: typeof O; }
+>Common : typeof Common
 >I : typeof I
 
 o.i
diff --git a/tests/baselines/reference/typeFromPropertyAssignment26.errors.txt b/tests/baselines/reference/typeFromPropertyAssignment26.errors.txt
new file mode 100644
index 0000000000000..0cc5213515253
--- /dev/null
+++ b/tests/baselines/reference/typeFromPropertyAssignment26.errors.txt
@@ -0,0 +1,24 @@
+tests/cases/conformance/salsa/bug24730.js(11,14): error TS2339: Property 'doesNotExist' does not exist on type 'C'.
+tests/cases/conformance/salsa/bug24730.js(12,26): error TS2339: Property 'doesntExistEither' does not exist on type 'number'.
+
+
+==== tests/cases/conformance/salsa/bug24730.js (2 errors) ====
+    var UI = {}
+    UI.TreeElement = class {
+        constructor() {
+            this.treeOutline = 12
+        }
+    };
+    UI.context = new UI.TreeElement()
+    
+    class C extends UI.TreeElement {
+        onpopulate() {
+            this.doesNotExist
+                 ~~~~~~~~~~~~
+!!! error TS2339: Property 'doesNotExist' does not exist on type 'C'.
+            this.treeOutline.doesntExistEither()
+                             ~~~~~~~~~~~~~~~~~
+!!! error TS2339: Property 'doesntExistEither' does not exist on type 'number'.
+        }
+    };
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/typeFromPropertyAssignment26.symbols b/tests/baselines/reference/typeFromPropertyAssignment26.symbols
new file mode 100644
index 0000000000000..f70413c819f28
--- /dev/null
+++ b/tests/baselines/reference/typeFromPropertyAssignment26.symbols
@@ -0,0 +1,43 @@
+=== tests/cases/conformance/salsa/bug24730.js ===
+var UI = {}
+>UI : Symbol(UI, Decl(bug24730.js, 0, 3), Decl(bug24730.js, 0, 11))
+
+UI.TreeElement = class {
+>UI.TreeElement : Symbol(UI.TreeElement, Decl(bug24730.js, 0, 11))
+>UI : Symbol(UI, Decl(bug24730.js, 0, 3), Decl(bug24730.js, 0, 11))
+>TreeElement : Symbol(UI.TreeElement, Decl(bug24730.js, 0, 11))
+
+    constructor() {
+        this.treeOutline = 12
+>this.treeOutline : Symbol(TreeElement.treeOutline, Decl(bug24730.js, 2, 19))
+>this : Symbol(TreeElement, Decl(bug24730.js, 1, 16))
+>treeOutline : Symbol(TreeElement.treeOutline, Decl(bug24730.js, 2, 19))
+    }
+};
+UI.context = new UI.TreeElement()
+>UI.context : Symbol(UI.context, Decl(bug24730.js, 5, 2))
+>UI : Symbol(UI, Decl(bug24730.js, 0, 3), Decl(bug24730.js, 0, 11))
+>context : Symbol(UI.context, Decl(bug24730.js, 5, 2))
+>UI.TreeElement : Symbol(UI.TreeElement, Decl(bug24730.js, 0, 11))
+>UI : Symbol(UI, Decl(bug24730.js, 0, 3), Decl(bug24730.js, 0, 11))
+>TreeElement : Symbol(UI.TreeElement, Decl(bug24730.js, 0, 11))
+
+class C extends UI.TreeElement {
+>C : Symbol(C, Decl(bug24730.js, 6, 33))
+>UI.TreeElement : Symbol(UI.TreeElement, Decl(bug24730.js, 0, 11))
+>UI : Symbol(UI, Decl(bug24730.js, 0, 3), Decl(bug24730.js, 0, 11))
+>TreeElement : Symbol(UI.TreeElement, Decl(bug24730.js, 0, 11))
+
+    onpopulate() {
+>onpopulate : Symbol(C.onpopulate, Decl(bug24730.js, 8, 32))
+
+        this.doesNotExist
+>this : Symbol(C, Decl(bug24730.js, 6, 33))
+
+        this.treeOutline.doesntExistEither()
+>this.treeOutline : Symbol(TreeElement.treeOutline, Decl(bug24730.js, 2, 19))
+>this : Symbol(C, Decl(bug24730.js, 6, 33))
+>treeOutline : Symbol(TreeElement.treeOutline, Decl(bug24730.js, 2, 19))
+    }
+};
+
diff --git a/tests/baselines/reference/typeFromPropertyAssignment26.types b/tests/baselines/reference/typeFromPropertyAssignment26.types
new file mode 100644
index 0000000000000..d40ca74137287
--- /dev/null
+++ b/tests/baselines/reference/typeFromPropertyAssignment26.types
@@ -0,0 +1,55 @@
+=== tests/cases/conformance/salsa/bug24730.js ===
+var UI = {}
+>UI : typeof UI
+>{} : { [x: string]: any; }
+
+UI.TreeElement = class {
+>UI.TreeElement = class {    constructor() {        this.treeOutline = 12    }} : typeof TreeElement
+>UI.TreeElement : typeof TreeElement
+>UI : typeof UI
+>TreeElement : typeof TreeElement
+>class {    constructor() {        this.treeOutline = 12    }} : typeof TreeElement
+
+    constructor() {
+        this.treeOutline = 12
+>this.treeOutline = 12 : 12
+>this.treeOutline : number
+>this : this
+>treeOutline : number
+>12 : 12
+    }
+};
+UI.context = new UI.TreeElement()
+>UI.context = new UI.TreeElement() : TreeElement
+>UI.context : TreeElement
+>UI : typeof UI
+>context : TreeElement
+>new UI.TreeElement() : TreeElement
+>UI.TreeElement : typeof TreeElement
+>UI : typeof UI
+>TreeElement : typeof TreeElement
+
+class C extends UI.TreeElement {
+>C : C
+>UI.TreeElement : TreeElement
+>UI : typeof UI
+>TreeElement : typeof TreeElement
+
+    onpopulate() {
+>onpopulate : () => void
+
+        this.doesNotExist
+>this.doesNotExist : any
+>this : this
+>doesNotExist : any
+
+        this.treeOutline.doesntExistEither()
+>this.treeOutline.doesntExistEither() : any
+>this.treeOutline.doesntExistEither : any
+>this.treeOutline : number
+>this : this
+>treeOutline : number
+>doesntExistEither : any
+    }
+};
+
diff --git a/tests/baselines/reference/typeFromPropertyAssignment4.types b/tests/baselines/reference/typeFromPropertyAssignment4.types
index 90b97d91d0c32..612a0f696e103 100644
--- a/tests/baselines/reference/typeFromPropertyAssignment4.types
+++ b/tests/baselines/reference/typeFromPropertyAssignment4.types
@@ -1,13 +1,13 @@
 === tests/cases/conformance/salsa/def.js ===
 var Outer = {};
->Outer : { [x: string]: any; Inner: typeof Inner; }
->{} : { [x: string]: any; Inner: typeof Inner; }
+>Outer : typeof Outer
+>{} : { [x: string]: any; }
 
 === tests/cases/conformance/salsa/a.js ===
 Outer.Inner = class {
 >Outer.Inner = class {    constructor() {        /** @type {number} */        this.y = 12    }} : typeof Inner
 >Outer.Inner : typeof Inner
->Outer : { [x: string]: any; Inner: typeof Inner; }
+>Outer : typeof Outer
 >Inner : typeof Inner
 >class {    constructor() {        /** @type {number} */        this.y = 12    }} : typeof Inner
 
@@ -35,7 +35,7 @@ var inner = new Outer.Inner()
 >inner : Inner
 >new Outer.Inner() : Inner
 >Outer.Inner : typeof Inner
->Outer : { [x: string]: any; Inner: typeof Inner; }
+>Outer : typeof Outer
 >Inner : typeof Inner
 
 inner.y
@@ -57,7 +57,7 @@ var z = new Outer.Inner()
 >z : Inner
 >new Outer.Inner() : Inner
 >Outer.Inner : typeof Inner
->Outer : { [x: string]: any; Inner: typeof Inner; }
+>Outer : typeof Outer
 >Inner : typeof Inner
 
 z.y
diff --git a/tests/baselines/reference/typeFromPropertyAssignment7.types b/tests/baselines/reference/typeFromPropertyAssignment7.types
index c17abf3216398..395dbee2c418d 100644
--- a/tests/baselines/reference/typeFromPropertyAssignment7.types
+++ b/tests/baselines/reference/typeFromPropertyAssignment7.types
@@ -1,12 +1,12 @@
 === tests/cases/conformance/salsa/a.js ===
 var obj = {};
->obj : { [x: string]: any; method(hunch: any): boolean; }
->{} : { [x: string]: any; method(hunch: any): boolean; }
+>obj : typeof obj
+>{} : { [x: string]: any; }
 
 obj.method = function (hunch) {
 >obj.method = function (hunch) {    return true;} : (hunch: any) => boolean
 >obj.method : (hunch: any) => boolean
->obj : { [x: string]: any; method(hunch: any): boolean; }
+>obj : typeof obj
 >method : (hunch: any) => boolean
 >function (hunch) {    return true;} : (hunch: any) => boolean
 >hunch : any
@@ -18,6 +18,6 @@ var b = obj.method();
 >b : boolean
 >obj.method() : boolean
 >obj.method : (hunch: any) => boolean
->obj : { [x: string]: any; method(hunch: any): boolean; }
+>obj : typeof obj
 >method : (hunch: any) => boolean
 
diff --git a/tests/baselines/reference/typeFromPropertyAssignment8.types b/tests/baselines/reference/typeFromPropertyAssignment8.types
index 71ebad0624c4a..8aa93afb463c9 100644
--- a/tests/baselines/reference/typeFromPropertyAssignment8.types
+++ b/tests/baselines/reference/typeFromPropertyAssignment8.types
@@ -1,27 +1,27 @@
 === tests/cases/conformance/salsa/a.js ===
 var my = my || {};
->my : { [x: string]: any; app: { [x: string]: any; Application: () => void; }; }
->my || {} : { [x: string]: any; app: { [x: string]: any; Application: () => void; }; }
->my : { [x: string]: any; app: { [x: string]: any; Application: () => void; }; }
->{} : { [x: string]: any; app: { [x: string]: any; Application: () => void; }; }
+>my : typeof my
+>my || {} : typeof my | { [x: string]: any; }
+>my : typeof my
+>{} : { [x: string]: any; }
 
 my.app = my.app || {};
->my.app = my.app || {} : { [x: string]: any; Application: () => void; }
->my.app : { [x: string]: any; Application: () => void; }
->my : { [x: string]: any; app: { [x: string]: any; Application: () => void; }; }
->app : { [x: string]: any; Application: () => void; }
->my.app || {} : { [x: string]: any; Application: () => void; }
->my.app : { [x: string]: any; Application: () => void; }
->my : { [x: string]: any; app: { [x: string]: any; Application: () => void; }; }
->app : { [x: string]: any; Application: () => void; }
->{} : { [x: string]: any; Application: () => void; }
+>my.app = my.app || {} : typeof my.app
+>my.app : typeof my.app
+>my : typeof my
+>app : typeof my.app
+>my.app || {} : { [x: string]: any; }
+>my.app : typeof my.app
+>my : typeof my
+>app : typeof my.app
+>{} : { [x: string]: any; }
 
 my.app.Application = (function () {
 >my.app.Application = (function () {var Application = function () {    //...};return Application;})() : () => void
 >my.app.Application : () => void
->my.app : { [x: string]: any; Application: () => void; }
->my : { [x: string]: any; app: { [x: string]: any; Application: () => void; }; }
->app : { [x: string]: any; Application: () => void; }
+>my.app : typeof my.app
+>my : typeof my
+>app : typeof my.app
 >Application : () => void
 >(function () {var Application = function () {    //...};return Application;})() : () => void
 >(function () {var Application = function () {    //...};return Application;}) : () => () => void
@@ -40,37 +40,37 @@ return Application;
 my.app.Application()
 >my.app.Application() : void
 >my.app.Application : () => void
->my.app : { [x: string]: any; Application: () => void; }
->my : { [x: string]: any; app: { [x: string]: any; Application: () => void; }; }
->app : { [x: string]: any; Application: () => void; }
+>my.app : typeof my.app
+>my : typeof my
+>app : typeof my.app
 >Application : () => void
 
 === tests/cases/conformance/salsa/b.js ===
 var min = window.min || {};
->min : { [x: string]: any; app: { [x: string]: any; Application: () => void; }; }
+>min : typeof min
 >window.min || {} : any
 >window.min : any
 >window : Window
 >min : any
->{} : { [x: string]: any; app: { [x: string]: any; Application: () => void; }; }
+>{} : { [x: string]: any; }
 
 min.app = min.app || {};
->min.app = min.app || {} : { [x: string]: any; Application: () => void; }
->min.app : { [x: string]: any; Application: () => void; }
->min : { [x: string]: any; app: { [x: string]: any; Application: () => void; }; }
->app : { [x: string]: any; Application: () => void; }
->min.app || {} : { [x: string]: any; Application: () => void; }
->min.app : { [x: string]: any; Application: () => void; }
->min : { [x: string]: any; app: { [x: string]: any; Application: () => void; }; }
->app : { [x: string]: any; Application: () => void; }
->{} : { [x: string]: any; Application: () => void; }
+>min.app = min.app || {} : typeof min.app
+>min.app : typeof min.app
+>min : typeof min
+>app : typeof min.app
+>min.app || {} : { [x: string]: any; }
+>min.app : typeof min.app
+>min : typeof min
+>app : typeof min.app
+>{} : { [x: string]: any; }
 
 min.app.Application = (function () {
 >min.app.Application = (function () {var Application = function () {    //...};return Application;})() : () => void
 >min.app.Application : () => void
->min.app : { [x: string]: any; Application: () => void; }
->min : { [x: string]: any; app: { [x: string]: any; Application: () => void; }; }
->app : { [x: string]: any; Application: () => void; }
+>min.app : typeof min.app
+>min : typeof min
+>app : typeof min.app
 >Application : () => void
 >(function () {var Application = function () {    //...};return Application;})() : () => void
 >(function () {var Application = function () {    //...};return Application;}) : () => () => void
@@ -89,8 +89,8 @@ return Application;
 min.app.Application()
 >min.app.Application() : void
 >min.app.Application : () => void
->min.app : { [x: string]: any; Application: () => void; }
->min : { [x: string]: any; app: { [x: string]: any; Application: () => void; }; }
->app : { [x: string]: any; Application: () => void; }
+>min.app : typeof min.app
+>min : typeof min
+>app : typeof min.app
 >Application : () => void
 
diff --git a/tests/baselines/reference/typeFromPropertyAssignment9.symbols b/tests/baselines/reference/typeFromPropertyAssignment9.symbols
index 72dd84e4d64cf..27188c71b32db 100644
--- a/tests/baselines/reference/typeFromPropertyAssignment9.symbols
+++ b/tests/baselines/reference/typeFromPropertyAssignment9.symbols
@@ -40,7 +40,7 @@ my.predicate.query = function () {
 
     var me = this;
 >me : Symbol(me, Decl(a.js, 9, 7))
->this : Symbol(__object, Decl(a.js, 7, 30))
+>this : Symbol(my.predicate, Decl(a.js, 6, 15), Decl(a.js, 8, 3), Decl(a.js, 13, 3))
 
     me.property = false;
 >me : Symbol(me, Decl(a.js, 9, 7))
diff --git a/tests/baselines/reference/typeFromPropertyAssignment9.types b/tests/baselines/reference/typeFromPropertyAssignment9.types
index 61d4cb06b7101..e9212f950678d 100644
--- a/tests/baselines/reference/typeFromPropertyAssignment9.types
+++ b/tests/baselines/reference/typeFromPropertyAssignment9.types
@@ -1,15 +1,15 @@
 === tests/cases/conformance/salsa/a.js ===
 var my = my || {};
->my : { [x: string]: any; method(n: number): number; number: number; object: { [x: string]: any; }; predicate: { [x: string]: any; query: { (): void; another(): number; result: string; }; sort(first: number, second: number): number; type: typeof type; }; }
->my || {} : { [x: string]: any; method(n: number): number; number: number; object: { [x: string]: any; }; predicate: { [x: string]: any; query: { (): void; another(): number; result: string; }; sort(first: number, second: number): number; type: typeof type; }; }
->my : { [x: string]: any; method(n: number): number; number: number; object: { [x: string]: any; }; predicate: { [x: string]: any; query: { (): void; another(): number; result: string; }; sort(first: number, second: number): number; type: typeof type; }; }
->{} : { [x: string]: any; method(n: number): number; number: number; object: { [x: string]: any; }; predicate: { [x: string]: any; query: { (): void; another(): number; result: string; }; sort(first: number, second: number): number; type: typeof type; }; }
+>my : typeof my
+>my || {} : typeof my | { [x: string]: any; }
+>my : typeof my
+>{} : { [x: string]: any; }
 
 /** @param {number} n */
 my.method = function(n) {
 >my.method = function(n) {    return n + 1;} : (n: number) => number
 >my.method : (n: number) => number
->my : { [x: string]: any; method(n: number): number; number: number; object: { [x: string]: any; }; predicate: { [x: string]: any; query: { (): void; another(): number; result: string; }; sort(first: number, second: number): number; type: typeof type; }; }
+>my : typeof my
 >method : (n: number) => number
 >function(n) {    return n + 1;} : (n: number) => number
 >n : number
@@ -22,45 +22,45 @@ my.method = function(n) {
 my.number = 1;
 >my.number = 1 : 1
 >my.number : number
->my : { [x: string]: any; method(n: number): number; number: number; object: { [x: string]: any; }; predicate: { [x: string]: any; query: { (): void; another(): number; result: string; }; sort(first: number, second: number): number; type: typeof type; }; }
+>my : typeof my
 >number : number
 >1 : 1
 
 my.object = {};
 >my.object = {} : { [x: string]: any; }
 >my.object : { [x: string]: any; }
->my : { [x: string]: any; method(n: number): number; number: number; object: { [x: string]: any; }; predicate: { [x: string]: any; query: { (): void; another(): number; result: string; }; sort(first: number, second: number): number; type: typeof type; }; }
+>my : typeof my
 >object : { [x: string]: any; }
 >{} : { [x: string]: any; }
 
 my.predicate = my.predicate || {};
->my.predicate = my.predicate || {} : { [x: string]: any; query: { (): void; another(): number; result: string; }; sort(first: number, second: number): number; type: typeof type; }
->my.predicate : { [x: string]: any; query: { (): void; another(): number; result: string; }; sort(first: number, second: number): number; type: typeof type; }
->my : { [x: string]: any; method(n: number): number; number: number; object: { [x: string]: any; }; predicate: { [x: string]: any; query: { (): void; another(): number; result: string; }; sort(first: number, second: number): number; type: typeof type; }; }
->predicate : { [x: string]: any; query: { (): void; another(): number; result: string; }; sort(first: number, second: number): number; type: typeof type; }
->my.predicate || {} : { [x: string]: any; query: { (): void; another(): number; result: string; }; sort(first: number, second: number): number; type: typeof type; }
->my.predicate : { [x: string]: any; query: { (): void; another(): number; result: string; }; sort(first: number, second: number): number; type: typeof type; }
->my : { [x: string]: any; method(n: number): number; number: number; object: { [x: string]: any; }; predicate: { [x: string]: any; query: { (): void; another(): number; result: string; }; sort(first: number, second: number): number; type: typeof type; }; }
->predicate : { [x: string]: any; query: { (): void; another(): number; result: string; }; sort(first: number, second: number): number; type: typeof type; }
->{} : { [x: string]: any; query: { (): void; another(): number; result: string; }; sort(first: number, second: number): number; type: typeof type; }
+>my.predicate = my.predicate || {} : typeof my.predicate
+>my.predicate : typeof my.predicate
+>my : typeof my
+>predicate : typeof my.predicate
+>my.predicate || {} : { [x: string]: any; }
+>my.predicate : typeof my.predicate
+>my : typeof my
+>predicate : typeof my.predicate
+>{} : { [x: string]: any; }
 
 my.predicate.query = function () {
 >my.predicate.query = function () {    var me = this;    me.property = false;} : { (): void; another(): number; result: string; }
 >my.predicate.query : { (): void; another(): number; result: string; }
->my.predicate : { [x: string]: any; query: { (): void; another(): number; result: string; }; sort(first: number, second: number): number; type: typeof type; }
->my : { [x: string]: any; method(n: number): number; number: number; object: { [x: string]: any; }; predicate: { [x: string]: any; query: { (): void; another(): number; result: string; }; sort(first: number, second: number): number; type: typeof type; }; }
->predicate : { [x: string]: any; query: { (): void; another(): number; result: string; }; sort(first: number, second: number): number; type: typeof type; }
+>my.predicate : typeof my.predicate
+>my : typeof my
+>predicate : typeof my.predicate
 >query : { (): void; another(): number; result: string; }
 >function () {    var me = this;    me.property = false;} : { (): void; another(): number; result: string; }
 
     var me = this;
->me : { [x: string]: any; query: { (): void; another(): number; result: string; }; sort(first: number, second: number): number; type: typeof type; }
->this : { [x: string]: any; query: { (): void; another(): number; result: string; }; sort(first: number, second: number): number; type: typeof type; }
+>me : typeof my.predicate
+>this : typeof my.predicate
 
     me.property = false;
 >me.property = false : false
 >me.property : any
->me : { [x: string]: any; query: { (): void; another(): number; result: string; }; sort(first: number, second: number): number; type: typeof type; }
+>me : typeof my.predicate
 >property : any
 >false : false
 
@@ -69,18 +69,18 @@ var q = new my.predicate.query();
 >q : any
 >new my.predicate.query() : any
 >my.predicate.query : { (): void; another(): number; result: string; }
->my.predicate : { [x: string]: any; query: { (): void; another(): number; result: string; }; sort(first: number, second: number): number; type: typeof type; }
->my : { [x: string]: any; method(n: number): number; number: number; object: { [x: string]: any; }; predicate: { [x: string]: any; query: { (): void; another(): number; result: string; }; sort(first: number, second: number): number; type: typeof type; }; }
->predicate : { [x: string]: any; query: { (): void; another(): number; result: string; }; sort(first: number, second: number): number; type: typeof type; }
+>my.predicate : typeof my.predicate
+>my : typeof my
+>predicate : typeof my.predicate
 >query : { (): void; another(): number; result: string; }
 
 my.predicate.query.another = function () {
 >my.predicate.query.another = function () {    return 1;} : () => number
 >my.predicate.query.another : () => number
 >my.predicate.query : { (): void; another(): number; result: string; }
->my.predicate : { [x: string]: any; query: { (): void; another(): number; result: string; }; sort(first: number, second: number): number; type: typeof type; }
->my : { [x: string]: any; method(n: number): number; number: number; object: { [x: string]: any; }; predicate: { [x: string]: any; query: { (): void; another(): number; result: string; }; sort(first: number, second: number): number; type: typeof type; }; }
->predicate : { [x: string]: any; query: { (): void; another(): number; result: string; }; sort(first: number, second: number): number; type: typeof type; }
+>my.predicate : typeof my.predicate
+>my : typeof my
+>predicate : typeof my.predicate
 >query : { (): void; another(): number; result: string; }
 >another : () => number
 >function () {    return 1;} : () => number
@@ -92,9 +92,9 @@ my.predicate.query.result = 'none'
 >my.predicate.query.result = 'none' : "none"
 >my.predicate.query.result : string
 >my.predicate.query : { (): void; another(): number; result: string; }
->my.predicate : { [x: string]: any; query: { (): void; another(): number; result: string; }; sort(first: number, second: number): number; type: typeof type; }
->my : { [x: string]: any; method(n: number): number; number: number; object: { [x: string]: any; }; predicate: { [x: string]: any; query: { (): void; another(): number; result: string; }; sort(first: number, second: number): number; type: typeof type; }; }
->predicate : { [x: string]: any; query: { (): void; another(): number; result: string; }; sort(first: number, second: number): number; type: typeof type; }
+>my.predicate : typeof my.predicate
+>my : typeof my
+>predicate : typeof my.predicate
 >query : { (): void; another(): number; result: string; }
 >result : string
 >'none' : "none"
@@ -105,15 +105,15 @@ my.predicate.query.result = 'none'
 my.predicate.sort = my.predicate.sort || function (first, second) {
 >my.predicate.sort = my.predicate.sort || function (first, second) {    return first > second ? first : second;} : (first: number, second: number) => number
 >my.predicate.sort : (first: number, second: number) => number
->my.predicate : { [x: string]: any; query: { (): void; another(): number; result: string; }; sort(first: number, second: number): number; type: typeof type; }
->my : { [x: string]: any; method(n: number): number; number: number; object: { [x: string]: any; }; predicate: { [x: string]: any; query: { (): void; another(): number; result: string; }; sort(first: number, second: number): number; type: typeof type; }; }
->predicate : { [x: string]: any; query: { (): void; another(): number; result: string; }; sort(first: number, second: number): number; type: typeof type; }
+>my.predicate : typeof my.predicate
+>my : typeof my
+>predicate : typeof my.predicate
 >sort : (first: number, second: number) => number
 >my.predicate.sort || function (first, second) {    return first > second ? first : second;} : (first: number, second: number) => number
 >my.predicate.sort : (first: number, second: number) => number
->my.predicate : { [x: string]: any; query: { (): void; another(): number; result: string; }; sort(first: number, second: number): number; type: typeof type; }
->my : { [x: string]: any; method(n: number): number; number: number; object: { [x: string]: any; }; predicate: { [x: string]: any; query: { (): void; another(): number; result: string; }; sort(first: number, second: number): number; type: typeof type; }; }
->predicate : { [x: string]: any; query: { (): void; another(): number; result: string; }; sort(first: number, second: number): number; type: typeof type; }
+>my.predicate : typeof my.predicate
+>my : typeof my
+>predicate : typeof my.predicate
 >sort : (first: number, second: number) => number
 >function (first, second) {    return first > second ? first : second;} : (first: number, second: number) => number
 >first : number
@@ -130,9 +130,9 @@ my.predicate.sort = my.predicate.sort || function (first, second) {
 my.predicate.type = class {
 >my.predicate.type = class {    m() { return 101; }} : typeof type
 >my.predicate.type : typeof type
->my.predicate : { [x: string]: any; query: { (): void; another(): number; result: string; }; sort(first: number, second: number): number; type: typeof type; }
->my : { [x: string]: any; method(n: number): number; number: number; object: { [x: string]: any; }; predicate: { [x: string]: any; query: { (): void; another(): number; result: string; }; sort(first: number, second: number): number; type: typeof type; }; }
->predicate : { [x: string]: any; query: { (): void; another(): number; result: string; }; sort(first: number, second: number): number; type: typeof type; }
+>my.predicate : typeof my.predicate
+>my : typeof my
+>predicate : typeof my.predicate
 >type : typeof type
 >class {    m() { return 101; }} : typeof type
 
@@ -144,17 +144,17 @@ my.predicate.type = class {
 
 // global-ish prefixes
 var min = window.min || {};
->min : { [x: string]: any; nest: { (): void; other: typeof other; }; property: { [x: string]: any; }; }
+>min : typeof min
 >window.min || {} : any
 >window.min : any
 >window : Window
 >min : any
->{} : { [x: string]: any; nest: { (): void; other: typeof other; }; property: { [x: string]: any; }; }
+>{} : { [x: string]: any; }
 
 min.nest = this.min.nest || function () { };
 >min.nest = this.min.nest || function () { } : { (): void; other: typeof other; }
 >min.nest : { (): void; other: typeof other; }
->min : { [x: string]: any; nest: { (): void; other: typeof other; }; property: { [x: string]: any; }; }
+>min : typeof min
 >nest : { (): void; other: typeof other; }
 >this.min.nest || function () { } : { (): void; other: typeof other; }
 >this.min.nest : any
@@ -168,7 +168,7 @@ min.nest.other = self.min.nest.other || class { };
 >min.nest.other = self.min.nest.other || class { } : typeof other
 >min.nest.other : typeof other
 >min.nest : { (): void; other: typeof other; }
->min : { [x: string]: any; nest: { (): void; other: typeof other; }; property: { [x: string]: any; }; }
+>min : typeof min
 >nest : { (): void; other: typeof other; }
 >other : typeof other
 >self.min.nest.other || class { } : typeof other
@@ -184,7 +184,7 @@ min.nest.other = self.min.nest.other || class { };
 min.property = global.min.property || {};
 >min.property = global.min.property || {} : { [x: string]: any; }
 >min.property : { [x: string]: any; }
->min : { [x: string]: any; nest: { (): void; other: typeof other; }; property: { [x: string]: any; }; }
+>min : typeof min
 >property : { [x: string]: any; }
 >global.min.property || {} : { [x: string]: any; }
 >global.min.property : any
diff --git a/tests/baselines/reference/typeFromPropertyAssignmentOutOfOrder.types b/tests/baselines/reference/typeFromPropertyAssignmentOutOfOrder.types
index 191f45e3cb1ae..947028db3852d 100644
--- a/tests/baselines/reference/typeFromPropertyAssignmentOutOfOrder.types
+++ b/tests/baselines/reference/typeFromPropertyAssignmentOutOfOrder.types
@@ -2,7 +2,7 @@
 First.Item = class I {}
 >First.Item = class I {} : typeof I
 >First.Item : typeof I
->First : { [x: string]: any; Item: typeof I; }
+>First : typeof First
 >Item : typeof I
 >class I {} : typeof I
 >I : typeof I
@@ -10,21 +10,21 @@ First.Item = class I {}
 Common.Object = class extends First.Item {}
 >Common.Object = class extends First.Item {} : typeof Object
 >Common.Object : typeof Object
->Common : { [x: string]: any; Object: typeof Object; }
+>Common : typeof Common
 >Object : typeof Object
 >class extends First.Item {} : typeof Object
 >First.Item : I
->First : { [x: string]: any; Item: typeof I; }
+>First : typeof First
 >Item : typeof I
 
 Workspace.Object = class extends Common.Object {}
 >Workspace.Object = class extends Common.Object {} : typeof Object
 >Workspace.Object : typeof Object
->Workspace : { [x: string]: any; Object: typeof Object; }
+>Workspace : typeof Workspace
 >Object : typeof Object
 >class extends Common.Object {} : typeof Object
 >Common.Object : Object
->Common : { [x: string]: any; Object: typeof Object; }
+>Common : typeof Common
 >Object : typeof Object
 
 /** @type {Workspace.Object} */
@@ -33,14 +33,14 @@ var am;
 
 === tests/cases/conformance/salsa/roots.js ===
 var First = {};
->First : { [x: string]: any; Item: typeof I; }
->{} : { [x: string]: any; Item: typeof I; }
+>First : typeof First
+>{} : { [x: string]: any; }
 
 var Common = {};
->Common : { [x: string]: any; Object: typeof Object; }
->{} : { [x: string]: any; Object: typeof Object; }
+>Common : typeof Common
+>{} : { [x: string]: any; }
 
 var Workspace = {};
->Workspace : { [x: string]: any; Object: typeof Object; }
->{} : { [x: string]: any; Object: typeof Object; }
+>Workspace : typeof Workspace
+>{} : { [x: string]: any; }
 
diff --git a/tests/baselines/reference/typeFromPropertyAssignmentWithExport.types b/tests/baselines/reference/typeFromPropertyAssignmentWithExport.types
index 5329632527436..cd7823d00b22a 100644
--- a/tests/baselines/reference/typeFromPropertyAssignmentWithExport.types
+++ b/tests/baselines/reference/typeFromPropertyAssignmentWithExport.types
@@ -2,13 +2,13 @@
 // this is a javascript file...
 
 export const Adapter = {};
->Adapter : { [x: string]: any; prop: { [x: string]: any; }; asyncMethod(): void; }
->{} : { [x: string]: any; prop: { [x: string]: any; }; asyncMethod(): void; }
+>Adapter : typeof Adapter
+>{} : { [x: string]: any; }
 
 Adapter.prop = {};
 >Adapter.prop = {} : { [x: string]: any; }
 >Adapter.prop : { [x: string]: any; }
->Adapter : { [x: string]: any; prop: { [x: string]: any; }; asyncMethod(): void; }
+>Adapter : typeof Adapter
 >prop : { [x: string]: any; }
 >{} : { [x: string]: any; }
 
@@ -16,7 +16,7 @@ Adapter.prop = {};
 Adapter.asyncMethod = function() {}
 >Adapter.asyncMethod = function() {} : () => void
 >Adapter.asyncMethod : () => void
->Adapter : { [x: string]: any; prop: { [x: string]: any; }; asyncMethod(): void; }
+>Adapter : typeof Adapter
 >asyncMethod : () => void
 >function() {} : () => void
 
diff --git a/tests/baselines/reference/typedefCrossModule3.types b/tests/baselines/reference/typedefCrossModule3.types
index 9d3767dcbbaba..b9722719895d4 100644
--- a/tests/baselines/reference/typedefCrossModule3.types
+++ b/tests/baselines/reference/typedefCrossModule3.types
@@ -1,21 +1,21 @@
 === tests/cases/conformance/jsdoc/mod2.js ===
 /** @typedef {number} Foo */
 const ns = {};
->ns : { [x: string]: any; Foo: typeof Foo; }
->{} : { [x: string]: any; Foo: typeof Foo; }
+>ns : typeof ns
+>{} : { [x: string]: any; }
 
 ns.Foo = class {}
 >ns.Foo = class {} : typeof Foo
 >ns.Foo : typeof Foo
->ns : { [x: string]: any; Foo: typeof Foo; }
+>ns : typeof ns
 >Foo : typeof Foo
 >class {} : typeof Foo
 
 module.exports = ns;
->module.exports = ns : { [x: string]: any; Foo: typeof Foo; }
+>module.exports = ns : typeof ns
 >module.exports : any
 >module : any
 >exports : any
->ns : { [x: string]: any; Foo: typeof Foo; }
+>ns : typeof ns
 
 
diff --git a/tests/baselines/reference/typedefMultipleTypeParameters.errors.txt b/tests/baselines/reference/typedefMultipleTypeParameters.errors.txt
index e8d0e52ba0f7f..afd2e274317d4 100644
--- a/tests/baselines/reference/typedefMultipleTypeParameters.errors.txt
+++ b/tests/baselines/reference/typedefMultipleTypeParameters.errors.txt
@@ -1,9 +1,11 @@
-tests/cases/conformance/jsdoc/a.js(16,12): error TS2314: Generic type 'Everything' requires 5 type argument(s).
+tests/cases/conformance/jsdoc/a.js(12,23): error TS2344: Type '{ a: number; }' does not satisfy the constraint '{ a: number; b: string; }'.
+  Property 'b' is missing in type '{ a: number; }'.
+tests/cases/conformance/jsdoc/a.js(15,12): error TS2314: Generic type 'Everything' requires 5 type argument(s).
 tests/cases/conformance/jsdoc/test.ts(1,34): error TS2344: Type '{ a: number; }' does not satisfy the constraint '{ a: number; b: string; }'.
   Property 'b' is missing in type '{ a: number; }'.
 
 
-==== tests/cases/conformance/jsdoc/a.js (1 errors) ====
+==== tests/cases/conformance/jsdoc/a.js (2 errors) ====
     /**
      * @template {{ a: number, b: string }} T,U A Comment
      * @template {{ c: boolean }} V uh ... are comments even supported??
@@ -15,8 +17,10 @@ tests/cases/conformance/jsdoc/test.ts(1,34): error TS2344: Type '{ a: number; }'
     /** @type {Everything<{ a: number, b: 'hi', c: never }, undefined, { c: true, d: 1 }, number, string>} */
     var tuvwx;
     
-    // TODO: will error when #24592 is fixed
     /** @type {Everything<{ a: number  }, undefined, { c: 1, d: 1 }, number, string>} */
+                          ~~~~~~~~~~~~~~
+!!! error TS2344: Type '{ a: number; }' does not satisfy the constraint '{ a: number; b: string; }'.
+!!! error TS2344:   Property 'b' is missing in type '{ a: number; }'.
     var wrong;
     
     /** @type {Everything<{ a: number  }>} */
diff --git a/tests/baselines/reference/typedefMultipleTypeParameters.symbols b/tests/baselines/reference/typedefMultipleTypeParameters.symbols
index 9acd30fea1be4..f961ea7969864 100644
--- a/tests/baselines/reference/typedefMultipleTypeParameters.symbols
+++ b/tests/baselines/reference/typedefMultipleTypeParameters.symbols
@@ -11,14 +11,13 @@
 var tuvwx;
 >tuvwx : Symbol(tuvwx, Decl(a.js, 9, 3))
 
-// TODO: will error when #24592 is fixed
 /** @type {Everything<{ a: number  }, undefined, { c: 1, d: 1 }, number, string>} */
 var wrong;
->wrong : Symbol(wrong, Decl(a.js, 13, 3))
+>wrong : Symbol(wrong, Decl(a.js, 12, 3))
 
 /** @type {Everything<{ a: number  }>} */
 var insufficient;
->insufficient : Symbol(insufficient, Decl(a.js, 16, 3))
+>insufficient : Symbol(insufficient, Decl(a.js, 15, 3))
 
 === tests/cases/conformance/jsdoc/test.ts ===
 declare var actually: Everything<{ a: number  }, undefined, { c: 1, d: 1 }, number, string>;
diff --git a/tests/baselines/reference/typedefMultipleTypeParameters.types b/tests/baselines/reference/typedefMultipleTypeParameters.types
index 5bc38bb835bf8..ba3456b7faa0a 100644
--- a/tests/baselines/reference/typedefMultipleTypeParameters.types
+++ b/tests/baselines/reference/typedefMultipleTypeParameters.types
@@ -11,7 +11,6 @@
 var tuvwx;
 >tuvwx : { t: { a: number; b: "hi"; c: never; }; u: undefined; v: { c: true; d: 1; }; w: number; x: string; }
 
-// TODO: will error when #24592 is fixed
 /** @type {Everything<{ a: number  }, undefined, { c: 1, d: 1 }, number, string>} */
 var wrong;
 >wrong : { t: { a: number; }; u: undefined; v: { c: 1; d: 1; }; w: number; x: string; }
diff --git a/tests/baselines/reference/unusedLocalsStartingWithUnderscore.errors.txt b/tests/baselines/reference/unusedLocalsStartingWithUnderscore.errors.txt
index b8a0a50fea6ad..4a708b6aa8725 100644
--- a/tests/baselines/reference/unusedLocalsStartingWithUnderscore.errors.txt
+++ b/tests/baselines/reference/unusedLocalsStartingWithUnderscore.errors.txt
@@ -1,12 +1,17 @@
-tests/cases/compiler/unusedLocalsStartingWithUnderscore.ts(6,9): error TS6133: '_' is declared but its value is never read.
+/a.ts(7,11): error TS6133: '_ns' is declared but its value is never read.
+/a.ts(8,9): error TS6133: '_' is declared but its value is never read.
 
 
-==== tests/cases/compiler/unusedLocalsStartingWithUnderscore.ts (1 errors) ====
+==== /a.ts (2 errors) ====
+    import * as _ from "./a";
+    
     for (const _ of []) { }
     
     for (const _ in []) { }
     
-    namespace M {
+    namespace _ns {
+              ~~~
+!!! error TS6133: '_ns' is declared but its value is never read.
         let _;
             ~
 !!! error TS6133: '_' is declared but its value is never read.
@@ -14,4 +19,4 @@ tests/cases/compiler/unusedLocalsStartingWithUnderscore.ts(6,9): error TS6133: '
     
         for (const _ in []) { }
     }
-        
\ No newline at end of file
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/unusedLocalsStartingWithUnderscore.js b/tests/baselines/reference/unusedLocalsStartingWithUnderscore.js
index 90bbb7a4c02db..54b029445e39d 100644
--- a/tests/baselines/reference/unusedLocalsStartingWithUnderscore.js
+++ b/tests/baselines/reference/unusedLocalsStartingWithUnderscore.js
@@ -1,26 +1,30 @@
-//// [unusedLocalsStartingWithUnderscore.ts]
+//// [a.ts]
+import * as _ from "./a";
+
 for (const _ of []) { }
 
 for (const _ in []) { }
 
-namespace M {
+namespace _ns {
     let _;
     for (const _ of []) { }
 
     for (const _ in []) { }
 }
-    
 
-//// [unusedLocalsStartingWithUnderscore.js]
+
+//// [a.js]
+"use strict";
+exports.__esModule = true;
 for (var _i = 0, _a = []; _i < _a.length; _i++) {
-    var _ = _a[_i];
+    var _1 = _a[_i];
 }
-for (var _ in []) { }
-var M;
-(function (M) {
+for (var _2 in []) { }
+var _ns;
+(function (_ns) {
     var _;
     for (var _i = 0, _a = []; _i < _a.length; _i++) {
-        var _1 = _a[_i];
+        var _3 = _a[_i];
     }
-    for (var _2 in []) { }
-})(M || (M = {}));
+    for (var _4 in []) { }
+})(_ns || (_ns = {}));
diff --git a/tests/baselines/reference/unusedLocalsStartingWithUnderscore.symbols b/tests/baselines/reference/unusedLocalsStartingWithUnderscore.symbols
index df78d17e2afb7..4c13df877cdd8 100644
--- a/tests/baselines/reference/unusedLocalsStartingWithUnderscore.symbols
+++ b/tests/baselines/reference/unusedLocalsStartingWithUnderscore.symbols
@@ -1,20 +1,23 @@
-=== tests/cases/compiler/unusedLocalsStartingWithUnderscore.ts ===
+=== /a.ts ===
+import * as _ from "./a";
+>_ : Symbol(_, Decl(a.ts, 0, 6))
+
 for (const _ of []) { }
->_ : Symbol(_, Decl(unusedLocalsStartingWithUnderscore.ts, 0, 10))
+>_ : Symbol(_, Decl(a.ts, 2, 10))
 
 for (const _ in []) { }
->_ : Symbol(_, Decl(unusedLocalsStartingWithUnderscore.ts, 2, 10))
+>_ : Symbol(_, Decl(a.ts, 4, 10))
 
-namespace M {
->M : Symbol(M, Decl(unusedLocalsStartingWithUnderscore.ts, 2, 23))
+namespace _ns {
+>_ns : Symbol(_ns, Decl(a.ts, 4, 23))
 
     let _;
->_ : Symbol(_, Decl(unusedLocalsStartingWithUnderscore.ts, 5, 7))
+>_ : Symbol(_, Decl(a.ts, 7, 7))
 
     for (const _ of []) { }
->_ : Symbol(_, Decl(unusedLocalsStartingWithUnderscore.ts, 6, 14))
+>_ : Symbol(_, Decl(a.ts, 8, 14))
 
     for (const _ in []) { }
->_ : Symbol(_, Decl(unusedLocalsStartingWithUnderscore.ts, 8, 14))
+>_ : Symbol(_, Decl(a.ts, 10, 14))
 }
-    
+
diff --git a/tests/baselines/reference/unusedLocalsStartingWithUnderscore.types b/tests/baselines/reference/unusedLocalsStartingWithUnderscore.types
index 9f6a58e8d1eeb..88aa923a3e46f 100644
--- a/tests/baselines/reference/unusedLocalsStartingWithUnderscore.types
+++ b/tests/baselines/reference/unusedLocalsStartingWithUnderscore.types
@@ -1,4 +1,7 @@
-=== tests/cases/compiler/unusedLocalsStartingWithUnderscore.ts ===
+=== /a.ts ===
+import * as _ from "./a";
+>_ : typeof _
+
 for (const _ of []) { }
 >_ : any
 >[] : undefined[]
@@ -7,8 +10,8 @@ for (const _ in []) { }
 >_ : string
 >[] : undefined[]
 
-namespace M {
->M : typeof M
+namespace _ns {
+>_ns : typeof _ns
 
     let _;
 >_ : any
@@ -21,4 +24,4 @@ namespace M {
 >_ : string
 >[] : undefined[]
 }
-    
+
diff --git a/tests/baselines/reference/user/TypeScript-Node-Starter.log b/tests/baselines/reference/user/TypeScript-Node-Starter.log
index 9a0b3b007264f..affbd99af1ee8 100644
--- a/tests/baselines/reference/user/TypeScript-Node-Starter.log
+++ b/tests/baselines/reference/user/TypeScript-Node-Starter.log
@@ -1,5 +1,7 @@
 Exit Code: 1
 Standard output:
+node_modules/@types/jquery/index.d.ts(6366,66): error TS2344: Type '"timeout" | "onreadystatechange" | "responseType" | "withCredentials" | "msCaching"' does not satisfy the constraint '"abort" | "open" | "timeout" | "send" | "DONE" | "response" | "getAllResponseHeaders" | "getRespo...'.
+  Type '"msCaching"' is not assignable to type '"abort" | "open" | "timeout" | "send" | "DONE" | "response" | "getAllResponseHeaders" | "getRespo...'.
 node_modules/@types/passport-facebook/index.d.ts(50,31): error TS2689: Cannot extend an interface 'passport.Strategy'. Did you mean 'implements'?
 
 
diff --git a/tests/baselines/reference/user/acorn.log b/tests/baselines/reference/user/acorn.log
index c5b8d47654d0c..e17b6b539f7a4 100644
--- a/tests/baselines/reference/user/acorn.log
+++ b/tests/baselines/reference/user/acorn.log
@@ -8,6 +8,7 @@ node_modules/acorn/bin/_acorn.js(63,23): error TS2345: Argument of type 'string
 node_modules/acorn/bin/run_test262.js(3,21): error TS2307: Cannot find module 'test262-parser-runner'.
 node_modules/acorn/dist/acorn.es.js(36,1): error TS2322: Type 'null' is not assignable to type 'string'.
 node_modules/acorn/dist/acorn.es.js(36,32): error TS2322: Type 'null' is not assignable to type 'string'.
+node_modules/acorn/dist/acorn.es.js(410,56): error TS2339: Property 'push' does not exist on type '(token: any) => any'.
 node_modules/acorn/dist/acorn.es.js(543,43): error TS2339: Property 'startNode' does not exist on type 'Parser'.
 node_modules/acorn/dist/acorn.es.js(544,8): error TS2339: Property 'nextToken' does not exist on type 'Parser'.
 node_modules/acorn/dist/acorn.es.js(545,15): error TS2339: Property 'parseTopLevel' does not exist on type 'Parser'.
@@ -56,6 +57,7 @@ node_modules/acorn/dist/acorn.js(3,34): error TS2304: Cannot find name 'define'.
 node_modules/acorn/dist/acorn.js(3,47): error TS2304: Cannot find name 'define'.
 node_modules/acorn/dist/acorn.js(42,1): error TS2322: Type 'null' is not assignable to type 'string'.
 node_modules/acorn/dist/acorn.js(42,32): error TS2322: Type 'null' is not assignable to type 'string'.
+node_modules/acorn/dist/acorn.js(416,56): error TS2339: Property 'push' does not exist on type '(token: any) => any'.
 node_modules/acorn/dist/acorn.js(549,43): error TS2339: Property 'startNode' does not exist on type 'Parser'.
 node_modules/acorn/dist/acorn.js(550,8): error TS2339: Property 'nextToken' does not exist on type 'Parser'.
 node_modules/acorn/dist/acorn.js(551,15): error TS2339: Property 'parseTopLevel' does not exist on type 'Parser'.
@@ -145,11 +147,11 @@ node_modules/acorn/dist/acorn_loose.js(261,31): error TS2322: Type '{ start: any
 node_modules/acorn/dist/acorn_loose.js(264,21): error TS2339: Property 'loc' does not exist on type 'true'.
 node_modules/acorn/dist/acorn_loose.js(266,55): error TS2339: Property 'start' does not exist on type 'true'.
 node_modules/acorn/dist/acorn_loose.js(267,55): error TS2339: Property 'end' does not exist on type 'true'.
-node_modules/acorn/dist/walk.es.js(162,41): error TS2339: Property 'node' does not exist on type 'never'.
+node_modules/acorn/dist/walk.es.js(155,41): error TS2339: Property 'node' does not exist on type 'never'.
 node_modules/acorn/dist/walk.js(3,9): error TS2304: Cannot find name 'define'.
 node_modules/acorn/dist/walk.js(3,34): error TS2304: Cannot find name 'define'.
 node_modules/acorn/dist/walk.js(3,47): error TS2304: Cannot find name 'define'.
-node_modules/acorn/dist/walk.js(168,41): error TS2339: Property 'node' does not exist on type 'never'.
+node_modules/acorn/dist/walk.js(161,41): error TS2339: Property 'node' does not exist on type 'never'.
 
 
 
diff --git a/tests/baselines/reference/user/adonis-framework.log b/tests/baselines/reference/user/adonis-framework.log
index 0eb865c420886..5381d3e452ec0 100644
--- a/tests/baselines/reference/user/adonis-framework.log
+++ b/tests/baselines/reference/user/adonis-framework.log
@@ -36,7 +36,7 @@ node_modules/adonis-framework/src/Env/index.js(56,15): error TS2304: Cannot find
 node_modules/adonis-framework/src/Env/index.js(80,15): error TS2304: Cannot find name 'Mixed'.
 node_modules/adonis-framework/src/Event/index.js(13,21): error TS2307: Cannot find module 'adonis-fold'.
 node_modules/adonis-framework/src/Event/index.js(128,5): error TS2322: Type '() => {}[]' is not assignable to type 'any[]'.
-  Property 'flatMap' is missing in type '() => {}[]'.
+  Property 'push' is missing in type '() => {}[]'.
 node_modules/adonis-framework/src/Event/index.js(153,25): error TS2339: Property 'wildcard' does not exist on type 'EventEmitter2'.
 node_modules/adonis-framework/src/Event/index.js(188,17): error TS2304: Cannot find name 'Spread'.
 node_modules/adonis-framework/src/Event/index.js(207,24): error TS2304: Cannot find name 'Sring'.
@@ -151,7 +151,6 @@ node_modules/adonis-framework/src/Session/SessionManager.js(71,76): error TS2339
 node_modules/adonis-framework/src/Session/Store.js(28,13): error TS2304: Cannot find name 'Mixed'.
 node_modules/adonis-framework/src/Session/Store.js(80,13): error TS2304: Cannot find name 'Mixed'.
 node_modules/adonis-framework/src/Session/index.js(10,14): error TS2304: Cannot find name 'SessionDriver'.
-node_modules/adonis-framework/src/Session/index.js(11,2): error TS1003: Identifier expected.
 node_modules/adonis-framework/src/Session/index.js(11,11): error TS2304: Cannot find name 'Class'.
 node_modules/adonis-framework/src/Session/index.js(46,15): error TS2304: Cannot find name 'SessionDriver'.
 node_modules/adonis-framework/src/Session/index.js(48,14): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
diff --git a/tests/baselines/reference/user/antd.log b/tests/baselines/reference/user/antd.log
deleted file mode 100644
index c40583096ed7c..0000000000000
--- a/tests/baselines/reference/user/antd.log
+++ /dev/null
@@ -1,9 +0,0 @@
-Exit Code: 1
-Standard output:
-node_modules/antd/lib/_util/type.d.ts(8,63): error TS2344: Type 'keyof T' does not satisfy the constraint 'string'.
-  Type 'string | number | symbol' is not assignable to type 'string'.
-    Type 'number' is not assignable to type 'string'.
-
-
-
-Standard error:
diff --git a/tests/baselines/reference/user/async.log b/tests/baselines/reference/user/async.log
index 5c1efc71f027b..689953c4bf5c9 100644
--- a/tests/baselines/reference/user/async.log
+++ b/tests/baselines/reference/user/async.log
@@ -131,7 +131,7 @@ node_modules/async/dist/async.js(2450,5): error TS2322: Type '{ [x: string]: any
 node_modules/async/dist/async.js(2521,9): error TS2722: Cannot invoke an object which is possibly 'undefined'.
 node_modules/async/dist/async.js(2564,31): error TS2345: Argument of type 'IArguments' is not assignable to parameter of type 'any[] | undefined'.
   Type 'IArguments' is not assignable to type 'any[]'.
-    Property 'flatMap' is missing in type 'IArguments'.
+    Property 'push' is missing in type 'IArguments'.
 node_modules/async/dist/async.js(2663,16): error TS2722: Cannot invoke an object which is possibly 'undefined'.
 node_modules/async/dist/async.js(2682,31): error TS1005: ']' expected.
 node_modules/async/dist/async.js(2707,31): error TS1005: ']' expected.
@@ -174,7 +174,7 @@ node_modules/async/dist/async.js(4163,26): error TS2339: Property 'process' does
 node_modules/async/dist/async.js(4167,14): error TS2339: Property 'unshift' does not exist on type 'NodeModule'.
 node_modules/async/dist/async.js(4381,5): error TS2322: Type 'any[] | {}' is not assignable to type 'any[]'.
   Type '{}' is not assignable to type 'any[]'.
-    Property 'flatMap' is missing in type '{}'.
+    Property 'length' is missing in type '{}'.
 node_modules/async/dist/async.js(4617,17): error TS2532: Object is possibly 'undefined'.
 node_modules/async/dist/async.js(4617,17): error TS2684: The 'this' context of type 'Function | undefined' is not assignable to method's 'this' of type 'Function'.
   Type 'undefined' is not assignable to type 'Function'.
diff --git a/tests/baselines/reference/user/bcryptjs.log b/tests/baselines/reference/user/bcryptjs.log
index 306680eacd5dd..96ba9e99252db 100644
--- a/tests/baselines/reference/user/bcryptjs.log
+++ b/tests/baselines/reference/user/bcryptjs.log
@@ -3,9 +3,9 @@ Standard output:
 node_modules/bcryptjs/scripts/build.js(1,26): error TS2307: Cannot find module 'metascript'.
 node_modules/bcryptjs/scripts/build.js(32,1): error TS2322: Type '{ VERSION: any; }' is not assignable to type '{ [x: string]: any; VERSION: any; ISAAC: boolean; }'.
   Property 'ISAAC' is missing in type '{ VERSION: any; }'.
-node_modules/bcryptjs/src/bcrypt/impl.js(516,22): error TS2345: Argument of type 'Int32Array | number[]' is not assignable to parameter of type 'number[]'.
+node_modules/bcryptjs/src/bcrypt/impl.js(516,22): error TS2345: Argument of type 'number[] | Int32Array' is not assignable to parameter of type 'number[]'.
   Type 'Int32Array' is not assignable to type 'number[]'.
-    Property 'flatMap' is missing in type 'Int32Array'.
+    Property 'push' is missing in type 'Int32Array'.
 node_modules/bcryptjs/src/bcrypt/impl.js(546,26): error TS2345: Argument of type 'null' is not assignable to parameter of type 'Error'.
 node_modules/bcryptjs/src/bcrypt/impl.js(658,23): error TS2345: Argument of type 'number[] | undefined' is not assignable to parameter of type 'number[]'.
   Type 'undefined' is not assignable to type 'number[]'.
@@ -21,7 +21,7 @@ node_modules/bcryptjs/src/bcrypt/prng/accum.js(66,22): error TS2339: Property 'd
 node_modules/bcryptjs/src/bcrypt/prng/accum.js(67,22): error TS2339: Property 'detachEvent' does not exist on type 'Document'.
 node_modules/bcryptjs/src/bcrypt/util.js(20,5): error TS2304: Cannot find name 'utfx'.
 node_modules/bcryptjs/src/bcrypt.js(25,13): error TS2322: Type 'Buffer' is not assignable to type 'number[]'.
-  Property 'flatMap' is missing in type 'Buffer'.
+  Property 'push' is missing in type 'Buffer'.
 node_modules/bcryptjs/src/bcrypt.js(94,14): error TS2366: Function lacks ending return statement and return type does not include 'undefined'.
 node_modules/bcryptjs/src/bcrypt.js(150,5): error TS2322: Type 'string | undefined' is not assignable to type 'string'.
   Type 'undefined' is not assignable to type 'string'.
diff --git a/tests/baselines/reference/user/chrome-devtools-frontend.log b/tests/baselines/reference/user/chrome-devtools-frontend.log
index af2c17426e33b..4650b6b44cb38 100644
--- a/tests/baselines/reference/user/chrome-devtools-frontend.log
+++ b/tests/baselines/reference/user/chrome-devtools-frontend.log
@@ -1,17 +1,16 @@
 Exit Code: 1
 Standard output:
-../../../../built/local/lib.dom.d.ts(2257,11): error TS2300: Duplicate identifier 'CSSRule'.
-../../../../built/local/lib.dom.d.ts(2276,13): error TS2300: Duplicate identifier 'CSSRule'.
-../../../../built/local/lib.dom.d.ts(2966,11): error TS2300: Duplicate identifier 'Comment'.
-../../../../built/local/lib.dom.d.ts(2970,13): error TS2300: Duplicate identifier 'Comment'.
-../../../../built/local/lib.dom.d.ts(4611,11): error TS2300: Duplicate identifier 'Event'.
-../../../../built/local/lib.dom.d.ts(4636,13): error TS2300: Duplicate identifier 'Event'.
-../../../../built/local/lib.dom.d.ts(10095,11): error TS2300: Duplicate identifier 'Position'.
-../../../../built/local/lib.dom.d.ts(10100,13): error TS2300: Duplicate identifier 'Position'.
-../../../../built/local/lib.dom.d.ts(10588,11): error TS2300: Duplicate identifier 'Request'.
-../../../../built/local/lib.dom.d.ts(10606,13): error TS2300: Duplicate identifier 'Request'.
-../../../../built/local/lib.dom.d.ts(14923,11): error TS2300: Duplicate identifier 'Window'.
-../../../../built/local/lib.dom.d.ts(15121,13): error TS2300: Duplicate identifier 'Window'.
+../../../../built/local/lib.dom.d.ts(2662,11): error TS2300: Duplicate identifier 'CSSRule'.
+../../../../built/local/lib.dom.d.ts(2681,13): error TS2300: Duplicate identifier 'CSSRule'.
+../../../../built/local/lib.dom.d.ts(3371,11): error TS2300: Duplicate identifier 'Comment'.
+../../../../built/local/lib.dom.d.ts(3375,13): error TS2300: Duplicate identifier 'Comment'.
+../../../../built/local/lib.dom.d.ts(5186,11): error TS2300: Duplicate identifier 'Event'.
+../../../../built/local/lib.dom.d.ts(5211,13): error TS2300: Duplicate identifier 'Event'.
+../../../../built/local/lib.dom.d.ts(11011,11): error TS2300: Duplicate identifier 'Position'.
+../../../../built/local/lib.dom.d.ts(11700,11): error TS2300: Duplicate identifier 'Request'.
+../../../../built/local/lib.dom.d.ts(11780,13): error TS2300: Duplicate identifier 'Request'.
+../../../../built/local/lib.dom.d.ts(16002,11): error TS2300: Duplicate identifier 'Window'.
+../../../../built/local/lib.dom.d.ts(16199,13): error TS2300: Duplicate identifier 'Window'.
 ../../../../built/local/lib.es5.d.ts(1346,11): error TS2300: Duplicate identifier 'ArrayLike'.
 ../../../../built/local/lib.es5.d.ts(1382,6): error TS2300: Duplicate identifier 'Record'.
 ../../../../node_modules/@types/node/index.d.ts(150,13): error TS2403: Subsequent variable declarations must have the same type.  Variable 'module' must be of type '{ [x: string]: any; }', but here has type 'NodeModule'.
@@ -32,8 +31,6 @@ node_modules/chrome-devtools-frontend/front_end/Runtime.js(280,5): error TS2322:
 node_modules/chrome-devtools-frontend/front_end/Runtime.js(283,7): error TS2554: Expected 2-3 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/Runtime.js(398,24): error TS1138: Parameter declaration expected.
 node_modules/chrome-devtools-frontend/front_end/Runtime.js(398,24): error TS8024: JSDoc '@param' tag has name 'function', but there is no parameter with that name.
-node_modules/chrome-devtools-frontend/front_end/Runtime.js(527,9): error TS2322: Type 'Function' is not assignable to type 'new () => any'.
-  Type 'Function' provides no match for the signature 'new (): any'.
 node_modules/chrome-devtools-frontend/front_end/Runtime.js(527,49): error TS2352: Type 'Window' cannot be converted to type 'Function'.
   Property 'apply' is missing in type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/Runtime.js(539,20): error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature.
@@ -50,7 +47,6 @@ node_modules/chrome-devtools-frontend/front_end/Runtime.js(1088,15): error TS235
 node_modules/chrome-devtools-frontend/front_end/Tests.js(107,5): error TS2322: Type 'Timer' is not assignable to type 'number'.
 node_modules/chrome-devtools-frontend/front_end/Tests.js(208,5): error TS2554: Expected 4 arguments, but got 3.
 node_modules/chrome-devtools-frontend/front_end/Tests.js(221,7): error TS2554: Expected 4 arguments, but got 3.
-node_modules/chrome-devtools-frontend/front_end/Tests.js(378,10): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
 node_modules/chrome-devtools-frontend/front_end/Tests.js(397,5): error TS2554: Expected 4 arguments, but got 3.
 node_modules/chrome-devtools-frontend/front_end/Tests.js(416,5): error TS2554: Expected 4 arguments, but got 3.
 node_modules/chrome-devtools-frontend/front_end/Tests.js(440,5): error TS2554: Expected 4 arguments, but got 3.
@@ -60,14 +56,10 @@ node_modules/chrome-devtools-frontend/front_end/Tests.js(590,27): error TS2554:
 node_modules/chrome-devtools-frontend/front_end/Tests.js(687,7): error TS2554: Expected 3 arguments, but got 2.
 node_modules/chrome-devtools-frontend/front_end/Tests.js(711,7): error TS2554: Expected 3 arguments, but got 2.
 node_modules/chrome-devtools-frontend/front_end/Tests.js(735,5): error TS2554: Expected 4 arguments, but got 3.
-node_modules/chrome-devtools-frontend/front_end/Tests.js(769,28): error TS2339: Property 'networkPresets' does not exist on type 'typeof MobileThrottling'.
-node_modules/chrome-devtools-frontend/front_end/Tests.js(775,28): error TS2339: Property 'networkPresets' does not exist on type 'typeof MobileThrottling'.
-node_modules/chrome-devtools-frontend/front_end/Tests.js(781,28): error TS2339: Property 'networkPresets' does not exist on type 'typeof MobileThrottling'.
-node_modules/chrome-devtools-frontend/front_end/Tests.js(814,31): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
 node_modules/chrome-devtools-frontend/front_end/Tests.js(816,7): error TS2554: Expected 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/Tests.js(847,9): error TS2554: Expected 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/Tests.js(848,9): error TS2554: Expected 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/Tests.js(886,29): error TS2339: Property 'getPreferences' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/Tests.js(886,29): error TS2339: Property 'getPreferences' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/Tests.js(890,17): error TS2339: Property '_instanceForTest' does not exist on type 'typeof Main'.
 node_modules/chrome-devtools-frontend/front_end/Tests.js(893,7): error TS2554: Expected 3 arguments, but got 2.
 node_modules/chrome-devtools-frontend/front_end/Tests.js(894,7): error TS2554: Expected 3 arguments, but got 2.
@@ -96,19 +88,15 @@ node_modules/chrome-devtools-frontend/front_end/Tests.js(977,11): error TS2554:
 node_modules/chrome-devtools-frontend/front_end/Tests.js(978,11): error TS2554: Expected 3 arguments, but got 2.
 node_modules/chrome-devtools-frontend/front_end/Tests.js(986,5): error TS2554: Expected 3 arguments, but got 2.
 node_modules/chrome-devtools-frontend/front_end/Tests.js(988,5): error TS2554: Expected 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/Tests.js(1033,25): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/Tests.js(1040,23): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/Tests.js(1084,20): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
 node_modules/chrome-devtools-frontend/front_end/Tests.js(1139,33): error TS2339: Property 'ConsoleView' does not exist on type '{ new (): Console; prototype: Console; }'.
 node_modules/chrome-devtools-frontend/front_end/Tests.js(1142,31): error TS2339: Property 'ConsoleView' does not exist on type '{ new (): Console; prototype: Console; }'.
 node_modules/chrome-devtools-frontend/front_end/Tests.js(1186,5): error TS2554: Expected 4 arguments, but got 3.
 node_modules/chrome-devtools-frontend/front_end/Tests.js(1199,9): error TS2554: Expected 4 arguments, but got 3.
-node_modules/chrome-devtools-frontend/front_end/Tests.js(1199,28): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
 node_modules/chrome-devtools-frontend/front_end/Tests.js(1229,10): error TS2339: Property 'uiTests' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/Tests.js(1229,41): error TS2339: Property 'domAutomationController' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/accessibility/ARIAAttributesView.js(9,11): error TS2554: Expected 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/accessibility/ARIAAttributesView.js(11,46): error TS2554: Expected 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/accessibility/ARIAAttributesView.js(45,27): error TS2694: Namespace 'DOMNode' has no exported member 'Attribute'.
+node_modules/chrome-devtools-frontend/front_end/accessibility/ARIAAttributesView.js(45,27): error TS2694: Namespace 'SDK.DOMNode' has no exported member 'Attribute'.
 node_modules/chrome-devtools-frontend/front_end/accessibility/ARIAAttributesView.js(64,18): error TS2339: Property 'setTextContentTruncatedIfNeeded' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/accessibility/ARIAAttributesView.js(77,26): error TS2339: Property 'removeChildren' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/accessibility/ARIAAttributesView.js(79,26): error TS2339: Property 'createChild' does not exist on type 'Element'.
@@ -121,7 +109,7 @@ node_modules/chrome-devtools-frontend/front_end/accessibility/ARIAAttributesView
 node_modules/chrome-devtools-frontend/front_end/accessibility/ARIAAttributesView.js(180,15): error TS2339: Property 'keyCode' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/accessibility/ARIAAttributesView.js(180,70): error TS2339: Property 'keyIdentifier' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/accessibility/ARIAAttributesView.js(182,13): error TS2339: Property 'consume' does not exist on type 'Event'.
-node_modules/chrome-devtools-frontend/front_end/accessibility/ARIAAttributesView.js(209,39): error TS2694: Namespace 'SuggestBox' has no exported member 'Suggestions'.
+node_modules/chrome-devtools-frontend/front_end/accessibility/ARIAAttributesView.js(209,39): error TS2694: Namespace 'UI.SuggestBox' has no exported member 'Suggestions'.
 node_modules/chrome-devtools-frontend/front_end/accessibility/ARIAAttributesView.js(213,36): error TS2339: Property '_isEditingName' does not exist on type 'ARIAAttributePrompt'.
 node_modules/chrome-devtools-frontend/front_end/accessibility/ARIAConfig.js(5,28): error TS2339: Property '_config' does not exist on type 'typeof ARIAMetadata'.
 node_modules/chrome-devtools-frontend/front_end/accessibility/ARIAMetadata.js(56,35): error TS2339: Property '_instance' does not exist on type 'typeof ARIAMetadata'.
@@ -187,7 +175,6 @@ node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeV
 node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeView.js(88,45): error TS2694: Namespace 'Protocol' has no exported member 'Accessibility'.
 node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeView.js(90,55): error TS2694: Namespace 'Protocol' has no exported member 'Accessibility'.
 node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeView.js(118,24): error TS2694: Namespace 'Protocol' has no exported member 'Accessibility'.
-node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeView.js(124,32): error TS2339: Property 'Accessibility' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeView.js(134,20): error TS2339: Property '_originalTextContent' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeView.js(142,18): error TS2339: Property 'setTextContentTruncatedIfNeeded' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeView.js(144,18): error TS2339: Property 'title' does not exist on type 'Element'.
@@ -196,7 +183,6 @@ node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeV
 node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeView.js(167,33): error TS2554: Expected 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeView.js(168,19): error TS2339: Property 'title' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeView.js(179,24): error TS2694: Namespace 'Protocol' has no exported member 'Accessibility'.
-node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeView.js(182,32): error TS2339: Property 'Accessibility' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeView.js(201,24): error TS2694: Namespace 'Protocol' has no exported member 'Accessibility'.
 node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeView.js(207,76): error TS2345: Argument of type '{ deferredNode: DeferredDOMNode; }' is not assignable to parameter of type '{ deferredNode: DeferredDOMNode; idref: string; }'.
   Property 'idref' is missing in type '{ deferredNode: DeferredDOMNode; }'.
@@ -205,10 +191,6 @@ node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeV
   Property 'idref' is missing in type '{ deferredNode: DeferredDOMNode; }'.
 node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeView.js(222,24): error TS2694: Namespace 'Protocol' has no exported member 'Accessibility'.
 node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeView.js(256,28): error TS2694: Namespace 'Protocol' has no exported member 'Accessibility'.
-node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeView.js(258,12): error TS2339: Property 'Accessibility' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeView.js(258,55): error TS2339: Property 'Accessibility' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeView.js(259,12): error TS2339: Property 'Accessibility' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeView.js(259,58): error TS2339: Property 'Accessibility' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeView.js(267,24): error TS2694: Namespace 'Protocol' has no exported member 'Accessibility'.
 node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeView.js(288,26): error TS2339: Property 'removeChildren' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeView.js(292,26): error TS2339: Property 'createChild' does not exist on type 'Element'.
@@ -220,10 +202,7 @@ node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeV
 node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeView.js(355,77): error TS2345: Argument of type '{ idref: any; }' is not assignable to parameter of type '{ deferredNode: DeferredDOMNode; idref: string; }'.
   Property 'deferredNode' is missing in type '{ idref: any; }'.
 node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeView.js(361,24): error TS2694: Namespace 'Protocol' has no exported member 'Accessibility'.
-node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeView.js(368,33): error TS2339: Property 'Accessibility' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeView.js(369,33): error TS2339: Property 'Accessibility' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeView.js(382,24): error TS2694: Namespace 'Protocol' has no exported member 'Accessibility'.
-node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeView.js(386,38): error TS2339: Property 'Accessibility' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeView.js(395,37): error TS2554: Expected 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeView.js(396,23): error TS2339: Property 'title' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeView.js(396,31): error TS2554: Expected 2 arguments, but got 1.
@@ -236,78 +215,83 @@ node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeV
 node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeView.js(431,26): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeView.js(435,28): error TS2339: Property 'createTextChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeView.js(438,28): error TS2339: Property 'createTextChild' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeView.js(445,20): error TS2339: Property 'Accessibility' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeView.js(445,62): error TS2554: Expected 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeView.js(461,24): error TS2694: Namespace 'Protocol' has no exported member 'Accessibility'.
-node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeView.js(481,20): error TS2339: Property 'Accessibility' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeView.js(492,24): error TS2694: Namespace 'Protocol' has no exported member 'Accessibility'.
 node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeView.js(521,84): error TS2554: Expected 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeView.js(522,20): error TS2339: Property 'createTextChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeView.js(535,24): error TS2694: Namespace 'Protocol' has no exported member 'Accessibility'.
 node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeView.js(619,26): error TS2339: Property 'removeChildren' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilityNodeView.js(626,33): error TS2339: Property 'Accessibility' does not exist on type 'typeof Protocol'.
+node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilitySidebarView.js(15,37): error TS2345: Argument of type 'AXBreadcrumbsPane' is not assignable to parameter of type '{ [x: string]: any; viewId(): string; title(): string; isCloseable(): boolean; isTransient(): boo...'.
+  Property '_axSidebarView' does not exist on type '{ [x: string]: any; viewId(): string; title(): string; isCloseable(): boolean; isTransient(): boo...'.
+node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilitySidebarView.js(17,37): error TS2345: Argument of type 'ARIAAttributesPane' is not assignable to parameter of type '{ [x: string]: any; viewId(): string; title(): string; isCloseable(): boolean; isTransient(): boo...'.
+  Property '_noPropertiesInfo' does not exist on type '{ [x: string]: any; viewId(): string; title(): string; isCloseable(): boolean; isTransient(): boo...'.
+node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilitySidebarView.js(19,37): error TS2345: Argument of type 'AXNodeSubPane' is not assignable to parameter of type '{ [x: string]: any; viewId(): string; title(): string; isCloseable(): boolean; isTransient(): boo...'.
+  Property '_noNodeInfo' does not exist on type '{ [x: string]: any; viewId(): string; title(): string; isCloseable(): boolean; isTransient(): boo...'.
+node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilitySidebarView.js(59,39): error TS2345: Argument of type 'ARIAAttributesPane' is not assignable to parameter of type '{ [x: string]: any; viewId(): string; title(): string; isCloseable(): boolean; isTransient(): boo...'.
+node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilitySidebarView.js(61,41): error TS2345: Argument of type 'ARIAAttributesPane' is not assignable to parameter of type '{ [x: string]: any; viewId(): string; title(): string; isCloseable(): boolean; isTransient(): boo...'.
+  Property '_noPropertiesInfo' does not exist on type '{ [x: string]: any; viewId(): string; title(): string; isCloseable(): boolean; isTransient(): boo...'.
 node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilitySidebarView.js(129,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilitySidebarView.js(141,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/accessibility/AccessibilitySidebarView.js(195,29): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/accessibility_test_runner/AccessibilityPaneTestRunner.js(11,15): error TS2339: Property 'runtime' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/accessibility_test_runner/AccessibilityPaneTestRunner.js(17,12): error TS2339: Property 'runtime' does not exist on type 'Window'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationGroupPreviewUI.js(7,11): error TS2339: Property 'AnimationGroupPreviewUI' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationGroupPreviewUI.js(7,11): error TS2339: Property 'AnimationGroupPreviewUI' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationGroupPreviewUI.js(14,18): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationGroupPreviewUI.js(15,39): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationGroupPreviewUI.js(17,47): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationGroupPreviewUI.js(18,30): error TS2339: Property 'createSVGChild' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationGroupPreviewUI.js(70,37): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(8,11): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationGroupPreviewUI.js(70,37): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(8,11): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(15,26): error TS2339: Property 'animationAgent' does not exist on type 'Target'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(16,12): error TS2339: Property 'registerAnimationDispatcher' does not exist on type 'Target'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(16,54): error TS2339: Property 'AnimationDispatcher' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(28,47): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(35,45): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(16,54): error TS2339: Property 'AnimationDispatcher' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(28,47): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(35,45): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(49,29): error TS2339: Property 'remove' does not exist on type 'string[]'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(54,24): error TS2694: Namespace 'Protocol' has no exported member 'Animation'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(61,31): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(61,31): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(65,31): error TS2339: Property 'remove' does not exist on type 'string[]'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(104,45): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(123,26): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(168,33): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(171,11): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(180,11): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(104,45): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(123,26): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(168,33): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(171,11): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(180,11): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(183,24): error TS2694: Namespace 'Protocol' has no exported member 'Animation'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(188,34): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(188,34): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(189,46): error TS2694: Namespace 'Protocol' has no exported member 'Animation'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(194,24): error TS2694: Namespace 'Protocol' has no exported member 'Animation'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(198,26): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(198,26): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(202,25): error TS2694: Namespace 'Protocol' has no exported member 'Animation'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(290,51): error TS2694: Namespace 'Animation' has no exported member 'Type'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(293,59): error TS2694: Namespace 'Animation' has no exported member 'Type'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(328,35): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(330,40): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(358,11): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(367,11): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(290,51): error TS2694: Namespace 'Animation.AnimationModel.Animation' has no exported member 'Type'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(293,59): error TS2694: Namespace 'Animation.AnimationModel.Animation' has no exported member 'Type'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(328,35): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(330,40): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(358,11): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(367,11): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(370,24): error TS2694: Namespace 'Protocol' has no exported member 'Animation'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(376,43): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(474,11): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(376,43): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(474,11): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(476,24): error TS2694: Namespace 'Protocol' has no exported member 'Animation'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(481,28): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(481,28): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(486,32): error TS2694: Namespace 'Protocol' has no exported member 'Animation'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(490,28): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(512,11): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(490,28): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(512,11): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(514,24): error TS2694: Namespace 'Protocol' has no exported member 'Animation'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(553,11): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(553,11): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(583,43): error TS2339: Property 'remove' does not exist on type 'Map<string, AnimationGroup>'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(665,37): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(665,37): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(691,24): error TS2304: Cannot find name 'Image'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(708,11): error TS2339: Property 'AnimationDispatcher' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(708,11): error TS2339: Property 'AnimationDispatcher' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(731,24): error TS2694: Namespace 'Protocol' has no exported member 'Animation'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(741,11): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(747,67): error TS2694: Namespace 'ScreenshotCapture' has no exported member 'Request'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(751,53): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(741,11): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(747,67): error TS2694: Namespace 'Animation.AnimationModel.ScreenshotCapture' has no exported member 'Request'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(751,53): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(778,24): error TS2694: Namespace 'Protocol' has no exported member 'Page'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(782,60): error TS2694: Namespace 'ScreenshotCapture' has no exported member 'Request'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(810,65): error TS1003: Identifier expected.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(811,11): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(782,60): error TS2694: Namespace 'Animation.AnimationModel.ScreenshotCapture' has no exported member 'Request'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(811,11): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationModel.js(811,44): error TS2300: Duplicate identifier 'Request'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationScreenshotPopover.js(7,11): error TS2339: Property 'AnimationScreenshotPopover' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationScreenshotPopover.js(7,11): error TS2339: Property 'AnimationScreenshotPopover' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationScreenshotPopover.js(9,23): error TS2304: Cannot find name 'Image'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationScreenshotPopover.js(18,39): error TS2345: Argument of type 'new (width?: number, height?: number) => HTMLImageElement' is not assignable to parameter of type 'Node'.
   Property 'baseURI' is missing in type 'new (width?: number, height?: number) => HTMLImageElement'.
@@ -319,19 +303,19 @@ node_modules/chrome-devtools-frontend/front_end/animation/AnimationScreenshotPop
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationScreenshotPopover.js(42,39): error TS2339: Property 'window' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationScreenshotPopover.js(53,50): error TS2339: Property 'style' does not exist on type 'new (width?: number, height?: number) => HTMLImageElement'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationScreenshotPopover.js(55,52): error TS2339: Property 'style' does not exist on type 'new (width?: number, height?: number) => HTMLImageElement'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(8,11): error TS2339: Property 'AnimationTimeline' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(8,11): error TS2339: Property 'AnimationTimeline' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(14,38): error TS2339: Property 'createSVGChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(19,53): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(20,44): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(21,32): error TS2554: Expected 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(26,32): error TS2694: Namespace 'Protocol' has no exported member 'DOM'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(36,47): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(44,67): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(52,67): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(80,19): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(81,47): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(89,19): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(90,50): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(36,47): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(44,67): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(52,67): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(80,19): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(81,47): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(89,19): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(90,50): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(103,57): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(105,28): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(110,48): error TS2339: Property 'createChild' does not exist on type 'Element'.
@@ -341,7 +325,7 @@ node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(1
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(117,46): error TS2554: Expected 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(119,34): error TS2345: Argument of type 'ToolbarToggle' is not assignable to parameter of type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
   Type 'ToolbarToggle' is not assignable to type '{ [x: string]: any; item(): any & any; }'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(123,40): error TS2339: Property 'AnimationTimeline' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(123,40): error TS2339: Property 'AnimationTimeline' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(125,45): error TS2345: Argument of type 'TemplateStringsArray' is not assignable to parameter of type 'string | string[]'.
   Type 'TemplateStringsArray' is not assignable to type 'string[]'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(125,72): error TS2554: Expected 2 arguments, but got 1.
@@ -352,7 +336,7 @@ node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(1
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(138,35): error TS2554: Expected 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(139,41): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(144,48): error TS2554: Expected 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(145,36): error TS2339: Property 'AnimationTimeline' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(145,36): error TS2339: Property 'AnimationTimeline' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(148,31): error TS2345: Argument of type 'ToolbarToggle' is not assignable to parameter of type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
   Type 'ToolbarToggle' is not assignable to type '{ [x: string]: any; item(): any & any; }'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(165,19): error TS2694: Namespace 'UI' has no exported member 'PopoverRequest'.
@@ -361,30 +345,33 @@ node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(1
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(176,44): error TS2339: Property 'keysArray' does not exist on type 'Map<AnimationGroup, AnimationGroupPreviewUI>'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(177,63): error TS2339: Property 'parentElement' does not exist on type 'EventTarget'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(194,30): error TS2304: Cannot find name 'Image'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(197,25): error TS2339: Property 'AnimationScreenshotPopover' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(197,25): error TS2339: Property 'AnimationScreenshotPopover' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(208,50): error TS2554: Expected 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(208,67): error TS2554: Expected 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(216,67): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(216,67): error TS2339: Property 'AnimationModel' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(218,34): error TS2345: Argument of type 'number' is not assignable to parameter of type '{ [x: string]: any; WindowDocked: number; WindowUndocked: number; ScriptsBreakpointSet: number; T...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(233,42): error TS2339: Property 'AnimationTimeline' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(235,47): error TS2339: Property 'AnimationTimeline' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(244,38): error TS2339: Property 'AnimationTimeline' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(233,42): error TS2339: Property 'AnimationTimeline' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(235,47): error TS2339: Property 'AnimationTimeline' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(244,38): error TS2339: Property 'AnimationTimeline' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(246,36): error TS2554: Expected 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(249,38): error TS2339: Property 'AnimationTimeline' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(249,38): error TS2339: Property 'AnimationTimeline' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(251,36): error TS2554: Expected 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(254,38): error TS2339: Property 'AnimationTimeline' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(254,38): error TS2339: Property 'AnimationTimeline' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(256,36): error TS2554: Expected 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(334,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(359,28): error TS2345: Argument of type '(left: AnimationGroup, right: AnimationGroup) => boolean' is not assignable to parameter of type '(a: any, b: any) => number'.
   Type 'boolean' is not assignable to type 'number'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(373,33): error TS2339: Property 'AnimationGroupPreviewUI' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(373,33): error TS2339: Property 'AnimationGroupPreviewUI' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(386,23): error TS2339: Property 'remove' does not exist on type 'any[]'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(390,11): error TS2339: Property 'consume' does not exist on type 'Event'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(445,30): error TS2339: Property 'AnimationTimeline' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(450,37): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(445,30): error TS2339: Property 'AnimationTimeline' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(450,37): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(457,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(484,36): error TS2339: Property 'millisToString' does not exist on type 'NumberConstructor'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(565,51): error TS2339: Property 'animate' does not exist on type 'Element'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(566,9): error TS2345: Argument of type '{ transform: string; }[]' is not assignable to parameter of type 'PropertyIndexedKeyframes | Keyframe[]'.
+  Type '{ transform: string; }[]' is not assignable to type 'Keyframe[]'.
+    Type '{ transform: string; }' is not assignable to type 'Keyframe'.
+      Property 'alignContent' is missing in type '{ transform: string; }'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(571,18): error TS2339: Property 'window' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(587,44): error TS2339: Property 'millisToString' does not exist on type 'NumberConstructor'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(589,20): error TS2339: Property 'window' does not exist on type 'Element'.
@@ -393,136 +380,77 @@ node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(6
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(627,41): error TS2339: Property 'x' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(637,23): error TS2339: Property 'x' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(640,44): error TS2339: Property 'millisToString' does not exist on type 'NumberConstructor'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(655,11): error TS2339: Property 'AnimationTimeline' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(658,11): error TS2339: Property 'AnimationTimeline' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(667,11): error TS2339: Property 'AnimationTimeline' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(655,11): error TS2339: Property 'AnimationTimeline' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(658,11): error TS2339: Property 'AnimationTimeline' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(667,11): error TS2339: Property 'AnimationTimeline' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(673,38): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(674,42): error TS2339: Property 'createChild' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(713,11): error TS2339: Property 'AnimationTimeline' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(730,28): error TS2339: Property 'AnimationTimeline' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(733,28): error TS2339: Property 'AnimationTimeline' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(7,11): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(713,11): error TS2339: Property 'AnimationTimeline' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(730,28): error TS2339: Property 'AnimationTimeline' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationTimeline.js(733,28): error TS2339: Property 'AnimationTimeline' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(7,11): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(21,39): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(24,31): error TS2339: Property 'createSVGChild' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(25,48): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(26,50): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(30,73): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(37,29): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(45,39): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(46,27): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(25,48): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(26,50): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(30,73): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(37,29): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(45,39): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(46,27): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(46,59): error TS2339: Property 'hashCode' does not exist on type 'StringConstructor'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(69,30): error TS2339: Property 'createSVGChild' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(70,39): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(71,39): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(72,39): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(87,71): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(100,28): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(70,39): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(71,39): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(72,39): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(87,71): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(100,28): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(129,23): error TS2339: Property 'createSVGChild' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(131,41): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(133,40): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(145,29): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(147,29): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(149,29): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(131,41): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(133,40): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(145,29): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(147,29): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(149,29): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(170,32): error TS2339: Property 'createSVGChild' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(173,41): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(174,41): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(173,41): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(174,41): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(181,53): error TS2339: Property 'createSVGChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(182,53): error TS2339: Property 'createSVGChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(185,11): error TS2339: Property 'style' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(188,13): error TS2339: Property 'style' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(193,13): error TS2339: Property 'style' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(196,36): error TS2339: Property 'AnimationTimeline' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(196,36): error TS2339: Property 'AnimationTimeline' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(197,13): error TS2339: Property 'removeChildren' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(206,55): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(208,63): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(213,68): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(206,55): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(208,63): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(213,68): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(218,9): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; CSSTransition: string; CSSAnimation: string; WebAnimation: string; }' and 'string'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(240,52): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(242,61): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(245,70): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(240,52): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(242,61): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(245,70): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(255,94): error TS2339: Property 'createSVGChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(258,11): error TS2339: Property 'style' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(264,21): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(272,70): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(281,44): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(282,44): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(293,44): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(295,49): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(306,44): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(316,37): error TS2694: Namespace 'AnimationUI' has no exported member 'MouseEvents'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(264,21): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(272,70): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(281,44): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(282,44): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(293,44): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(295,49): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(306,44): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(316,37): error TS2694: Namespace 'Animation.AnimationUI' has no exported member 'MouseEvents'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(321,15): error TS2339: Property 'buttons' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(327,30): error TS2339: Property 'clientX' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(328,11): error TS2339: Property 'consume' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(338,33): error TS2339: Property 'clientX' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(348,33): error TS2339: Property 'clientX' does not exist on type 'Event'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(351,44): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(351,44): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
 node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(380,11): error TS2339: Property 'consume' does not exist on type 'Event'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(387,11): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(394,11): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(402,11): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/AppcacheTestRunner.js(20,26): error TS2339: Property 'resourceTreeModel' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/AppcacheTestRunner.js(31,26): error TS2339: Property 'resourceTreeModel' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/AppcacheTestRunner.js(41,26): error TS2339: Property 'resourceTreeModel' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/AppcacheTestRunner.js(53,40): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/AppcacheTestRunner.js(77,30): error TS2339: Property 'framesByFrameId' does not exist on type 'typeof ApplicationTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/AppcacheTestRunner.js(78,27): error TS2339: Property 'framesByFrameId' does not exist on type 'typeof ApplicationTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/AppcacheTestRunner.js(80,26): error TS2339: Property 'resourceTreeModel' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/AppcacheTestRunner.js(83,35): error TS2339: Property 'framesByFrameId' does not exist on type 'typeof ApplicationTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/AppcacheTestRunner.js(85,25): error TS2339: Property 'framesByFrameId' does not exist on type 'typeof ApplicationTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/AppcacheTestRunner.js(102,18): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/AppcacheTestRunner.js(130,32): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/AppcacheTestRunner.js(131,29): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/AppcacheTestRunner.js(144,29): error TS2339: Property 'applicationCacheStatusesRecords' does not exist on type 'typeof ApplicationTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/AppcacheTestRunner.js(145,27): error TS2339: Property 'applicationCacheStatusesRecords' does not exist on type 'typeof ApplicationTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/AppcacheTestRunner.js(149,25): error TS2339: Property 'applicationCacheStatusesRecords' does not exist on type 'typeof ApplicationTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/AppcacheTestRunner.js(156,32): error TS2339: Property 'applicationCacheStatusesRecords' does not exist on type 'typeof ApplicationTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/AppcacheTestRunner.js(157,29): error TS2339: Property 'applicationCacheStatusesRecords' does not exist on type 'typeof ApplicationTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/AppcacheTestRunner.js(159,27): error TS2339: Property 'applicationCacheStatusesRecords' does not exist on type 'typeof ApplicationTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/AppcacheTestRunner.js(161,31): error TS2339: Property 'awaitedFrameStatusEventsCount' does not exist on type 'typeof ApplicationTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/AppcacheTestRunner.js(162,31): error TS2339: Property 'awaitedFrameStatusEventsCount' does not exist on type 'typeof ApplicationTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/AppcacheTestRunner.js(163,29): error TS2339: Property 'awaitedFrameStatusEventsCount' does not exist on type 'typeof ApplicationTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/AppcacheTestRunner.js(165,34): error TS2339: Property 'awaitedFrameStatusEventsCount' does not exist on type 'typeof ApplicationTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/AppcacheTestRunner.js(166,31): error TS2339: Property 'awaitedFrameStatusEventsCount' does not exist on type 'typeof ApplicationTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/AppcacheTestRunner.js(174,39): error TS2339: Property 'applicationCacheStatusesRecords' does not exist on type 'typeof ApplicationTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/AppcacheTestRunner.js(182,30): error TS2339: Property 'awaitedFrameStatusEventsCount' does not exist on type 'typeof ApplicationTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/AppcacheTestRunner.js(183,27): error TS2339: Property 'awaitedFrameStatusEventsCount' does not exist on type 'typeof ApplicationTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/AppcacheTestRunner.js(185,25): error TS2339: Property 'awaitedFrameStatusEventsCount' does not exist on type 'typeof ApplicationTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/CacheStorageTestRunner.js(11,6): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/CacheStorageTestRunner.js(13,6): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/CacheStorageTestRunner.js(19,6): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/CacheStorageTestRunner.js(21,30): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(387,11): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(394,11): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
+node_modules/chrome-devtools-frontend/front_end/animation/AnimationUI.js(402,11): error TS2339: Property 'AnimationUI' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
 node_modules/chrome-devtools-frontend/front_end/application_test_runner/CacheStorageTestRunner.js(32,5): error TS2304: Cannot find name 'promise'.
 node_modules/chrome-devtools-frontend/front_end/application_test_runner/CacheStorageTestRunner.js(40,11): error TS2304: Cannot find name 'promise'.
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/CacheStorageTestRunner.js(61,6): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/CacheStorageTestRunner.js(68,30): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/CacheStorageTestRunner.js(70,6): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
 node_modules/chrome-devtools-frontend/front_end/application_test_runner/CacheStorageTestRunner.js(135,10): error TS2554: Expected 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/IndexedDBTestRunner.js(12,33): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/IndexedDBTestRunner.js(47,35): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
 node_modules/chrome-devtools-frontend/front_end/application_test_runner/IndexedDBTestRunner.js(140,24): error TS2554: Expected 1 arguments, but got 2.
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/IndexedDBTestRunner.js(140,96): error TS2339: Property 'securityOriginManager' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/ResourceTreeTestRunner.js(20,14): error TS2339: Property 'resourceTreeModel' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/ResourceTreeTestRunner.js(34,14): error TS2339: Property 'resourceTreeModel' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/ResourceTreeTestRunner.js(37,59): error TS2339: Property 'resourceTreeModel' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/ResourceTreeTestRunner.js(69,11): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/ResourceTreeTestRunner.js(71,30): error TS2339: Property '_testSourceNavigator' does not exist on type 'typeof ApplicationTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/ResourceTreeTestRunner.js(72,27): error TS2339: Property '_testSourceNavigator' does not exist on type 'typeof ApplicationTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/ResourceTreeTestRunner.js(73,27): error TS2339: Property '_testSourceNavigator' does not exist on type 'typeof ApplicationTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/ResourceTreeTestRunner.js(76,71): error TS2339: Property '_testSourceNavigator' does not exist on type 'typeof ApplicationTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/ResourcesTestRunner.js(18,20): error TS2339: Property 'mainTarget' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/ResourcesTestRunner.js(30,19): error TS2339: Property 'resourceTreeModel' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/ResourcesTestRunner.js(31,16): error TS2339: Property 'resourceTreeModel' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/ResourcesTestRunner.js(48,18): error TS2339: Property 'resourceTreeModel' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/ResourcesTestRunner.js(56,16): error TS2339: Property 'resourceTreeModel' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/ResourcesTestRunner.js(76,8): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/ResourcesTestRunner.js(77,26): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/ResourcesTestRunner.js(90,14): error TS2339: Property 'resourceTreeModel' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/ResourcesTestRunner.js(103,21): error TS2339: Property 'mainTarget' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/ResourcesTestRunner.js(107,21): error TS2339: Property 'mainTarget' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/ResourcesTestRunner.js(111,21): error TS2339: Property 'mainTarget' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/ServiceWorkersTestRunner.js(44,19): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/ServiceWorkersTestRunner.js(55,14): error TS2339: Property 'serviceWorkerManager' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/application_test_runner/ServiceWorkersTestRunner.js(57,18): error TS2339: Property 'serviceWorkerManager' does not exist on type 'typeof TestRunner'.
 node_modules/chrome-devtools-frontend/front_end/audits2/Audits2Panel.js(16,50): error TS2345: Argument of type '(msg: string) => void' is not assignable to parameter of type '(arg0: string) => undefined'.
   Type 'void' is not assignable to type 'undefined'.
 node_modules/chrome-devtools-frontend/front_end/audits2/Audits2Panel.js(16,76): error TS2555: Expected at least 2 arguments, but got 1.
@@ -548,7 +476,7 @@ node_modules/chrome-devtools-frontend/front_end/audits2/Audits2Panel.js(162,25):
 node_modules/chrome-devtools-frontend/front_end/audits2/Audits2Panel.js(183,73): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/audits2/Audits2Panel.js(184,44): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/audits2/Audits2Panel.js(188,24): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/audits2/Audits2Panel.js(190,46): error TS2339: Property 'openInNewTab' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/audits2/Audits2Panel.js(190,46): error TS2339: Property 'openInNewTab' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/audits2/Audits2Panel.js(193,9): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/audits2/Audits2Panel.js(200,57): error TS2339: Property 'consume' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/audits2/Audits2Panel.js(202,34): error TS2339: Property 'createChild' does not exist on type 'DocumentFragment'.
@@ -583,20 +511,18 @@ node_modules/chrome-devtools-frontend/front_end/audits2/Audits2Panel.js(511,32):
 node_modules/chrome-devtools-frontend/front_end/audits2/Audits2Panel.js(511,58): error TS2339: Property 'message' does not exist on type 'any[]'.
 node_modules/chrome-devtools-frontend/front_end/audits2/Audits2Panel.js(514,49): error TS2339: Property 'progressBarClass' does not exist on type 'any[]'.
 node_modules/chrome-devtools-frontend/front_end/audits2/Audits2Panel.js(523,5): error TS2322: Type '{ [x: string]: any; progressBarClass: string; message: string; statusMessagePrefix: string; order...' is not assignable to type 'any[]'.
-  Property 'flatMap' is missing in type '{ [x: string]: any; progressBarClass: string; message: string; statusMessagePrefix: string; order...'.
 node_modules/chrome-devtools-frontend/front_end/audits2/Audits2Panel.js(523,5): error TS2322: Type '{ [x: string]: any; progressBarClass: string; message: string; statusMessagePrefix: string; order...' is not assignable to type 'any[]'.
+  Property 'length' is missing in type '{ [x: string]: any; progressBarClass: string; message: string; statusMessagePrefix: string; order...'.
 node_modules/chrome-devtools-frontend/front_end/audits2/Audits2Panel.js(553,32): error TS2345: Argument of type 'TemplateStringsArray' is not assignable to parameter of type 'string | string[]'.
   Type 'TemplateStringsArray' is not assignable to type 'string[]'.
 node_modules/chrome-devtools-frontend/front_end/audits2/Audits2Panel.js(594,38): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/audits2/Audits2Panel.js(597,21): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/audits2/Audits2Panel.js(625,33): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/audits2/Audits2Panel.js(630,75): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/audits2/Audits2Panel.js(679,53): error TS2304: Cannot find name 'ReportRenderer'.
 node_modules/chrome-devtools-frontend/front_end/audits2/Audits2Panel.js(690,15): error TS2503: Cannot find namespace 'ReportRenderer'.
 node_modules/chrome-devtools-frontend/front_end/audits2/Audits2Panel.js(701,15): error TS2503: Cannot find namespace 'ReportRenderer'.
-node_modules/chrome-devtools-frontend/front_end/audits2/Audits2Panel.js(717,97): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/audits2/Audits2Panel.js(718,22): error TS2551: Property 'Preset' does not exist on type 'typeof Audits2Panel'. Did you mean 'Presets'?
-node_modules/chrome-devtools-frontend/front_end/audits2/Audits2Panel.js(720,42): error TS2694: Namespace 'Audits2Panel' has no exported member 'Preset'.
+node_modules/chrome-devtools-frontend/front_end/audits2/Audits2Panel.js(720,42): error TS2694: Namespace 'Audits2.Audits2Panel' has no exported member 'Preset'.
 node_modules/chrome-devtools-frontend/front_end/audits2/Audits2Panel.js(780,25): error TS2503: Cannot find namespace 'ReportRenderer'.
 node_modules/chrome-devtools-frontend/front_end/audits2/Audits2Panel.js(832,25): error TS2503: Cannot find namespace 'ReportRenderer'.
 node_modules/chrome-devtools-frontend/front_end/audits2/Audits2Panel.js(901,15): error TS2503: Cannot find namespace 'ReportRenderer'.
@@ -746,7 +672,6 @@ node_modules/chrome-devtools-frontend/front_end/audits2/lighthouse/renderer/repo
 node_modules/chrome-devtools-frontend/front_end/audits2/lighthouse/renderer/report-renderer.js(237,16): error TS2339: Property 'ReportJSON' does not exist on type 'typeof ReportRenderer'.
 node_modules/chrome-devtools-frontend/front_end/audits2/lighthouse/renderer/util.js(124,5): error TS2322: Type '{}' is not assignable to type '{ numPathParts: number; preserveQuery: boolean; preserveHost: boolean; }'.
   Property 'numPathParts' is missing in type '{}'.
-node_modules/chrome-devtools-frontend/front_end/audits2_test_runner/Audits2TestRunner.js(14,38): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
 node_modules/chrome-devtools-frontend/front_end/audits2_test_runner/Audits2TestRunner.js(76,33): error TS2339: Property 'textElement' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/audits2_test_runner/Audits2TestRunner.js(77,40): error TS2339: Property 'checkboxElement' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/audits2_test_runner/Audits2TestRunner.js(89,29): error TS2339: Property 'disabled' does not exist on type 'Element'.
@@ -757,11 +682,12 @@ node_modules/chrome-devtools-frontend/front_end/audits2_worker/Audits2Service.js
 node_modules/chrome-devtools-frontend/front_end/audits2_worker/Audits2Service.js(46,10): error TS2339: Property 'listenForStatus' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/audits2_worker/Audits2Service.js(51,25): error TS2339: Property 'runLighthouseInWorker' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/audits2_worker/Audits2Service.js(52,27): error TS2503: Cannot find namespace 'ReportRenderer'.
-node_modules/chrome-devtools-frontend/front_end/audits2_worker/Audits2Service.js(128,1): error TS2322: Type 'Window' is not assignable to type 'typeof global'.
-  Types of property 'document' are incompatible.
-    Type 'Document' is not assignable to type '{ [x: string]: any; documentElement: { [x: string]: any; style: { [x: string]: any; WebkitAppeara...'.
-      Property 'URL' does not exist on type '{ [x: string]: any; documentElement: { [x: string]: any; style: { [x: string]: any; WebkitAppeara...'.
-node_modules/chrome-devtools-frontend/front_end/audits2_worker/Audits2Service.js(129,8): error TS2339: Property 'isVinn' does not exist on type 'typeof global'.
+node_modules/chrome-devtools-frontend/front_end/audits2_worker/Audits2Service.js(128,1): error TS2322: Type 'Window' is not assignable to type 'Global'.
+  Property 'Array' is missing in type 'Window'.
+node_modules/chrome-devtools-frontend/front_end/audits2_worker/Audits2Service.js(129,8): error TS2339: Property 'isVinn' does not exist on type 'Global'.
+node_modules/chrome-devtools-frontend/front_end/audits2_worker/Audits2Service.js(130,8): error TS2339: Property 'document' does not exist on type 'Global'.
+node_modules/chrome-devtools-frontend/front_end/audits2_worker/Audits2Service.js(131,8): error TS2339: Property 'document' does not exist on type 'Global'.
+node_modules/chrome-devtools-frontend/front_end/audits2_worker/Audits2Service.js(132,8): error TS2339: Property 'document' does not exist on type 'Global'.
 node_modules/chrome-devtools-frontend/front_end/audits2_worker/lighthouse/lighthouse-background.js(2,1): error TS2322: Type '(o: any, u: any) => any' is not assignable to type 'NodeRequire'.
   Property 'resolve' is missing in type '(o: any, u: any) => any'.
 node_modules/chrome-devtools-frontend/front_end/audits2_worker/lighthouse/lighthouse-background.js(2,121): error TS2554: Expected 1 arguments, but got 2.
@@ -775,7 +701,7 @@ node_modules/chrome-devtools-frontend/front_end/audits2_worker/lighthouse/lighth
 node_modules/chrome-devtools-frontend/front_end/audits2_worker/lighthouse/lighthouse-background.js(9093,1): error TS2554: Expected 0-2 arguments, but got 3.
 node_modules/chrome-devtools-frontend/front_end/audits2_worker/lighthouse/lighthouse-background.js(9117,1): error TS2554: Expected 0-2 arguments, but got 3.
 node_modules/chrome-devtools-frontend/front_end/audits2_worker/lighthouse/lighthouse-background.js(9467,15): error TS2339: Property 'axe' does not exist on type 'Window'.
-node_modules/chrome-devtools-frontend/front_end/audits2_worker/lighthouse/lighthouse-background.js(9708,34): error TS2345: Argument of type 'any[][]' is not assignable to parameter of type 'Iterable<[any, any]>'.
+node_modules/chrome-devtools-frontend/front_end/audits2_worker/lighthouse/lighthouse-background.js(9708,34): error TS2345: Argument of type 'any[][]' is not assignable to parameter of type 'ReadonlyArray<[any, any]>'.
 node_modules/chrome-devtools-frontend/front_end/audits2_worker/lighthouse/lighthouse-background.js(9948,10): error TS2693: 'ShadowRoot' only refers to a type, but is being used as a value here.
 node_modules/chrome-devtools-frontend/front_end/audits2_worker/lighthouse/lighthouse-background.js(9969,4): error TS2693: 'ShadowRoot' only refers to a type, but is being used as a value here.
 node_modules/chrome-devtools-frontend/front_end/audits2_worker/lighthouse/lighthouse-background.js(10092,16): error TS2304: Cannot find name 'd41d8cd98f00b204e9800998ecf8427e_LibraryDetectorTests'.
@@ -786,7 +712,6 @@ node_modules/chrome-devtools-frontend/front_end/audits2_worker/lighthouse/lighth
 node_modules/chrome-devtools-frontend/front_end/audits2_worker/lighthouse/lighthouse-background.js(13607,7): error TS2339: Property 'protocolMethod' does not exist on type 'Error'.
 node_modules/chrome-devtools-frontend/front_end/audits2_worker/lighthouse/lighthouse-background.js(13608,7): error TS2339: Property 'protocolError' does not exist on type 'Error'.
 node_modules/chrome-devtools-frontend/front_end/audits2_worker/lighthouse/lighthouse-background.js(14352,1): error TS2722: Cannot invoke an object which is possibly 'undefined'.
-node_modules/chrome-devtools-frontend/front_end/audits2_worker/lighthouse/lighthouse-background.js(14860,28): error TS2339: Property '__nativeError' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/audits2_worker/lighthouse/lighthouse-background.js(14940,8): error TS2339: Property '____lastLongTask' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/audits2_worker/lighthouse/lighthouse-background.js(14941,27): error TS2339: Property 'PerformanceObserver' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/audits2_worker/lighthouse/lighthouse-background.js(14946,8): error TS2339: Property '____lastLongTask' does not exist on type 'Window'.
@@ -1070,7 +995,7 @@ node_modules/chrome-devtools-frontend/front_end/audits2_worker/lighthouse/lighth
 node_modules/chrome-devtools-frontend/front_end/audits2_worker/lighthouse/lighthouse-background.js(39899,1): error TS2304: Cannot find name 'WebInspector'.
 node_modules/chrome-devtools-frontend/front_end/audits2_worker/lighthouse/lighthouse-background.js(39909,1): error TS2304: Cannot find name 'WebInspector'.
 node_modules/chrome-devtools-frontend/front_end/audits2_worker/lighthouse/lighthouse-background.js(39957,1): error TS2304: Cannot find name 'WebInspector'.
-node_modules/chrome-devtools-frontend/front_end/audits2_worker/lighthouse/lighthouse-background.js(39957,68): error TS2339: Property 'message' does not exist on type 'FileReaderProgressEvent'.
+node_modules/chrome-devtools-frontend/front_end/audits2_worker/lighthouse/lighthouse-background.js(39957,68): error TS2339: Property 'message' does not exist on type 'ProgressEvent'.
 node_modules/chrome-devtools-frontend/front_end/audits2_worker/lighthouse/lighthouse-background.js(39963,1): error TS2304: Cannot find name 'WebInspector'.
 node_modules/chrome-devtools-frontend/front_end/audits2_worker/lighthouse/lighthouse-background.js(39980,16): error TS2304: Cannot find name 'WebInspector'.
 node_modules/chrome-devtools-frontend/front_end/audits2_worker/lighthouse/lighthouse-background.js(39986,1): error TS2304: Cannot find name 'WebInspector'.
@@ -1680,7 +1605,6 @@ node_modules/chrome-devtools-frontend/front_end/audits2_worker/lighthouse/lighth
 node_modules/chrome-devtools-frontend/front_end/audits2_worker/lighthouse/lighthouse-background.js(49936,1): error TS2304: Cannot find name 'WebInspector'.
 node_modules/chrome-devtools-frontend/front_end/audits2_worker/lighthouse/lighthouse-background.js(49943,1): error TS2304: Cannot find name 'WebInspector'.
 node_modules/chrome-devtools-frontend/front_end/audits2_worker/lighthouse/lighthouse-background.js(50006,1): error TS2304: Cannot find name 'WebInspector'.
-node_modules/chrome-devtools-frontend/front_end/audits2_worker/lighthouse/lighthouse-background.js(50008,10): error TS2339: Property 'Agents' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/audits2_worker/lighthouse/lighthouse-background.js(50015,29): error TS2304: Cannot find name 'InspectorBackendClass'.
 node_modules/chrome-devtools-frontend/front_end/audits2_worker/lighthouse/lighthouse-background.js(50016,10): error TS2304: Cannot find name 'WebInspector'.
 node_modules/chrome-devtools-frontend/front_end/audits2_worker/lighthouse/lighthouse-background.js(50025,1): error TS2304: Cannot find name 'WebInspector'.
@@ -1693,9 +1617,8 @@ node_modules/chrome-devtools-frontend/front_end/audits2_worker/lighthouse/lighth
 node_modules/chrome-devtools-frontend/front_end/audits2_worker/lighthouse/lighthouse-background.js(50135,32): error TS2304: Cannot find name 'WebInspector'.
 node_modules/chrome-devtools-frontend/front_end/audits2_worker/lighthouse/lighthouse-background.js(50143,32): error TS2304: Cannot find name 'WebInspector'.
 node_modules/chrome-devtools-frontend/front_end/audits2_worker/lighthouse/lighthouse-background.js(50162,46): error TS2304: Cannot find name 'WebInspector'.
-node_modules/chrome-devtools-frontend/front_end/audits2_worker/lighthouse/lighthouse-background.js(50206,23): error TS2339: Property 'inspectedURLChanged' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/audits2_worker/lighthouse/lighthouse-background.js(50206,23): error TS2339: Property 'inspectedURLChanged' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/audits2_worker/lighthouse/lighthouse-background.js(50207,46): error TS2304: Cannot find name 'WebInspector'.
-node_modules/chrome-devtools-frontend/front_end/audits2_worker/lighthouse/lighthouse-background.js(50210,20): error TS2339: Property 'Agents' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/audits2_worker/lighthouse/lighthouse-background.js(50218,1): error TS2304: Cannot find name 'WebInspector'.
 node_modules/chrome-devtools-frontend/front_end/audits2_worker/lighthouse/lighthouse-background.js(50220,1): error TS2304: Cannot find name 'WebInspector'.
 node_modules/chrome-devtools-frontend/front_end/audits2_worker/lighthouse/lighthouse-background.js(50224,1): error TS2304: Cannot find name 'WebInspector'.
@@ -3232,7 +3155,6 @@ node_modules/chrome-devtools-frontend/front_end/bindings/CSSWorkspaceBinding.js(
 node_modules/chrome-devtools-frontend/front_end/bindings/CSSWorkspaceBinding.js(216,42): error TS2339: Property 'get' does not exist on type 'Multimap'.
 node_modules/chrome-devtools-frontend/front_end/bindings/CSSWorkspaceBinding.js(218,30): error TS2339: Property 'set' does not exist on type 'Multimap'.
 node_modules/chrome-devtools-frontend/front_end/bindings/CSSWorkspaceBinding.js(221,21): error TS2339: Property 'deleteAll' does not exist on type 'Multimap'.
-node_modules/chrome-devtools-frontend/front_end/bindings/CSSWorkspaceBinding.js(232,41): error TS2551: Property 'resourceMapping' does not exist on type 'typeof Bindings'. Did you mean 'ResourceMapping'?
 node_modules/chrome-devtools-frontend/front_end/bindings/CompilerScriptMapping.js(48,52): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Debugger: string; Formatter: string; Network: string; Snippets: string; FileS...'.
 node_modules/chrome-devtools-frontend/front_end/bindings/CompilerScriptMapping.js(50,62): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Debugger: string; Formatter: string; Network: string; Snippets: string; FileS...'.
 node_modules/chrome-devtools-frontend/front_end/bindings/CompilerScriptMapping.js(59,56): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Debugger: string; Formatter: string; Network: string; Snippets: string; FileS...'.
@@ -3241,7 +3163,11 @@ node_modules/chrome-devtools-frontend/front_end/bindings/CompilerScriptMapping.j
 node_modules/chrome-devtools-frontend/front_end/bindings/CompilerScriptMapping.js(202,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/bindings/CompilerScriptMapping.js(218,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/bindings/ContentProviderBasedProject.js(39,25): error TS2694: Namespace 'Workspace' has no exported member 'projectTypes'.
+node_modules/chrome-devtools-frontend/front_end/bindings/ContentProviderBasedProject.js(48,26): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; workspace(): Workspace; id(): string; type(): string; isServiceProject(): boo...'.
+  Type 'ContentProviderBasedProject' is not assignable to type '{ [x: string]: any; workspace(): Workspace; id(): string; type(): string; isServiceProject(): boo...'.
+    Property '_contentProviders' does not exist on type '{ [x: string]: any; workspace(): Workspace; id(): string; type(): string; isServiceProject(): boo...'.
 node_modules/chrome-devtools-frontend/front_end/bindings/ContentProviderBasedProject.js(180,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
+node_modules/chrome-devtools-frontend/front_end/bindings/ContentProviderBasedProject.js(306,33): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; workspace(): Workspace; id(): string; type(): string; isServiceProject(): boo...'.
 node_modules/chrome-devtools-frontend/front_end/bindings/DebuggerWorkspaceBinding.js(51,31): error TS2339: Property 'remove' does not exist on type 'Map<DebuggerModel, ModelData>'.
 node_modules/chrome-devtools-frontend/front_end/bindings/DebuggerWorkspaceBinding.js(85,5): error TS2322: Type 'StackTraceTopFrameLocation' is not assignable to type '{ [x: string]: any; update(): void; uiLocation(): UILocation; dispose(): void; isBlackboxed(): bo...'.
   Property '_updateScheduled' does not exist on type '{ [x: string]: any; update(): void; uiLocation(): UILocation; dispose(): void; isBlackboxed(): bo...'.
@@ -3252,8 +3178,6 @@ node_modules/chrome-devtools-frontend/front_end/bindings/DebuggerWorkspaceBindin
 node_modules/chrome-devtools-frontend/front_end/bindings/DebuggerWorkspaceBinding.js(276,21): error TS2339: Property 'set' does not exist on type 'Multimap'.
 node_modules/chrome-devtools-frontend/front_end/bindings/DebuggerWorkspaceBinding.js(285,21): error TS2339: Property 'delete' does not exist on type 'Multimap'.
 node_modules/chrome-devtools-frontend/front_end/bindings/DebuggerWorkspaceBinding.js(292,42): error TS2339: Property 'get' does not exist on type 'Multimap'.
-node_modules/chrome-devtools-frontend/front_end/bindings/DebuggerWorkspaceBinding.js(304,41): error TS2551: Property 'resourceMapping' does not exist on type 'typeof Bindings'. Did you mean 'ResourceMapping'?
-node_modules/chrome-devtools-frontend/front_end/bindings/DebuggerWorkspaceBinding.js(320,33): error TS2551: Property 'resourceMapping' does not exist on type 'typeof Bindings'. Did you mean 'ResourceMapping'?
 node_modules/chrome-devtools-frontend/front_end/bindings/DebuggerWorkspaceBinding.js(452,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 node_modules/chrome-devtools-frontend/front_end/bindings/DebuggerWorkspaceBinding.js(460,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 node_modules/chrome-devtools-frontend/front_end/bindings/DefaultScriptMapping.js(44,63): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Debugger: string; Formatter: string; Network: string; Snippets: string; FileS...'.
@@ -3264,17 +3188,28 @@ node_modules/chrome-devtools-frontend/front_end/bindings/FileUtils.js(43,15): er
 node_modules/chrome-devtools-frontend/front_end/bindings/FileUtils.js(48,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 node_modules/chrome-devtools-frontend/front_end/bindings/FileUtils.js(55,16): error TS2304: Cannot find name 'FileError'.
 node_modules/chrome-devtools-frontend/front_end/bindings/FileUtils.js(78,17): error TS2304: Cannot find name 'FileError'.
+node_modules/chrome-devtools-frontend/front_end/bindings/FileUtils.js(88,38): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; fileSize(): number; loadedSize(): number; fileName(): string; cancel(): void;...'.
+  Type 'ChunkedFileReader' is not assignable to type '{ [x: string]: any; fileSize(): number; loadedSize(): number; fileName(): string; cancel(): void;...'.
+    Property '_file' does not exist on type '{ [x: string]: any; fileSize(): number; loadedSize(): number; fileName(): string; cancel(): void;...'.
 node_modules/chrome-devtools-frontend/front_end/bindings/FileUtils.js(125,23): error TS2339: Property 'name' does not exist on type 'Blob'.
 node_modules/chrome-devtools-frontend/front_end/bindings/FileUtils.js(130,16): error TS2304: Cannot find name 'FileError'.
 node_modules/chrome-devtools-frontend/front_end/bindings/FileUtils.js(143,22): error TS2339: Property 'readyState' does not exist on type 'EventTarget'.
 node_modules/chrome-devtools-frontend/front_end/bindings/FileUtils.js(146,31): error TS2339: Property 'result' does not exist on type 'EventTarget'.
+node_modules/chrome-devtools-frontend/front_end/bindings/FileUtils.js(154,38): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; fileSize(): number; loadedSize(): number; fileName(): string; cancel(): void;...'.
 node_modules/chrome-devtools-frontend/front_end/bindings/FileUtils.js(178,32): error TS2339: Property 'error' does not exist on type 'EventTarget'.
 node_modules/chrome-devtools-frontend/front_end/bindings/FileUtils.js(194,23): error TS1005: '>' expected.
 node_modules/chrome-devtools-frontend/front_end/bindings/FileUtils.js(227,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/bindings/LiveLocation.js(11,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 node_modules/chrome-devtools-frontend/front_end/bindings/LiveLocation.js(18,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
-node_modules/chrome-devtools-frontend/front_end/bindings/NetworkProject.js(158,14): error TS2551: Property 'networkProjectManager' does not exist on type 'typeof Bindings'. Did you mean 'NetworkProjectManager'?
-node_modules/chrome-devtools-frontend/front_end/bindings/NetworkProject.js(175,14): error TS2551: Property 'networkProjectManager' does not exist on type 'typeof Bindings'. Did you mean 'NetworkProjectManager'?
+node_modules/chrome-devtools-frontend/front_end/bindings/LiveLocation.js(35,29): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; update(): void; uiLocation(): UILocation; dispose(): void; isBlackboxed(): bo...'.
+  Type 'LiveLocationWithPool' is not assignable to type '{ [x: string]: any; update(): void; uiLocation(): UILocation; dispose(): void; isBlackboxed(): bo...'.
+    Property '_updateDelegate' does not exist on type '{ [x: string]: any; update(): void; uiLocation(): UILocation; dispose(): void; isBlackboxed(): bo...'.
+node_modules/chrome-devtools-frontend/front_end/bindings/LiveLocation.js(42,26): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; update(): void; uiLocation(): UILocation; dispose(): void; isBlackboxed(): bo...'.
+  Type 'LiveLocationWithPool' is not assignable to type '{ [x: string]: any; update(): void; uiLocation(): UILocation; dispose(): void; isBlackboxed(): bo...'.
+    Property '_updateDelegate' does not exist on type '{ [x: string]: any; update(): void; uiLocation(): UILocation; dispose(): void; isBlackboxed(): bo...'.
+node_modules/chrome-devtools-frontend/front_end/bindings/LiveLocation.js(57,32): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; update(): void; uiLocation(): UILocation; dispose(): void; isBlackboxed(): bo...'.
+  Type 'LiveLocationWithPool' is not assignable to type '{ [x: string]: any; update(): void; uiLocation(): UILocation; dispose(): void; isBlackboxed(): bo...'.
+    Property '_updateDelegate' does not exist on type '{ [x: string]: any; update(): void; uiLocation(): UILocation; dispose(): void; isBlackboxed(): bo...'.
 node_modules/chrome-devtools-frontend/front_end/bindings/NetworkProject.js(184,35): error TS2538: Type 'symbol' cannot be used as an index type.
 node_modules/chrome-devtools-frontend/front_end/bindings/NetworkProject.js(192,13): error TS2538: Type 'symbol' cannot be used as an index type.
 node_modules/chrome-devtools-frontend/front_end/bindings/NetworkProject.js(223,37): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Debugger: string; Formatter: string; Network: string; Snippets: string; FileS...'.
@@ -3291,6 +3226,9 @@ node_modules/chrome-devtools-frontend/front_end/bindings/ResourceMapping.js(181,
 node_modules/chrome-devtools-frontend/front_end/bindings/ResourceMapping.js(189,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/bindings/ResourceMapping.js(197,40): error TS2339: Property 'valuesArray' does not exist on type 'Map<string, Binding>'.
 node_modules/chrome-devtools-frontend/front_end/bindings/ResourceMapping.js(204,40): error TS2339: Property 'valuesArray' does not exist on type 'Map<string, Binding>'.
+node_modules/chrome-devtools-frontend/front_end/bindings/ResourceMapping.js(226,29): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
+  Type 'Binding' is not assignable to type '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
+    Property '_resources' does not exist on type '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
 node_modules/chrome-devtools-frontend/front_end/bindings/ResourceMapping.js(254,28): error TS2339: Property 'firstValue' does not exist on type 'Set<Resource>'.
 node_modules/chrome-devtools-frontend/front_end/bindings/ResourceMapping.js(262,28): error TS2339: Property 'firstValue' does not exist on type 'Set<Resource>'.
 node_modules/chrome-devtools-frontend/front_end/bindings/ResourceMapping.js(270,28): error TS2339: Property 'firstValue' does not exist on type 'Set<Resource>'.
@@ -3301,18 +3239,17 @@ node_modules/chrome-devtools-frontend/front_end/bindings/ResourceScriptMapping.j
 node_modules/chrome-devtools-frontend/front_end/bindings/ResourceScriptMapping.js(141,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/bindings/ResourceScriptMapping.js(155,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/bindings/ResourceScriptMapping.js(231,55): error TS2339: Property 'valuesArray' does not exist on type 'Set<UISourceCode>'.
-node_modules/chrome-devtools-frontend/front_end/bindings/ResourceScriptMapping.js(262,24): error TS2339: Property 'addEventListener' does not exist on type 'UISourceCode'.
-node_modules/chrome-devtools-frontend/front_end/bindings/ResourceScriptMapping.js(264,24): error TS2339: Property 'addEventListener' does not exist on type 'UISourceCode'.
 node_modules/chrome-devtools-frontend/front_end/bindings/ResourceScriptMapping.js(284,21): error TS2339: Property '_scriptSource' does not exist on type 'ResourceScriptFile'.
 node_modules/chrome-devtools-frontend/front_end/bindings/ResourceScriptMapping.js(291,38): error TS2339: Property '_scriptSource' does not exist on type 'ResourceScriptFile'.
 node_modules/chrome-devtools-frontend/front_end/bindings/ResourceScriptMapping.js(293,63): error TS2339: Property '_scriptSource' does not exist on type 'ResourceScriptFile'.
 node_modules/chrome-devtools-frontend/front_end/bindings/ResourceScriptMapping.js(298,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/bindings/ResourceScriptMapping.js(305,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/bindings/ResourceScriptMapping.js(318,26): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
+node_modules/chrome-devtools-frontend/front_end/bindings/ResourceScriptMapping.js(323,14): error TS2339: Property '_scriptSource' does not exist on type 'ResourceScriptFile'.
 node_modules/chrome-devtools-frontend/front_end/bindings/ResourceScriptMapping.js(329,82): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Info: string; Warning: string; Error: string; }'.
+node_modules/chrome-devtools-frontend/front_end/bindings/ResourceScriptMapping.js(334,11): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Error: string; Warning: string; }'.
 node_modules/chrome-devtools-frontend/front_end/bindings/ResourceScriptMapping.js(384,38): error TS2339: Property '_scriptSource' does not exist on type 'ResourceScriptFile'.
-node_modules/chrome-devtools-frontend/front_end/bindings/ResourceScriptMapping.js(405,24): error TS2339: Property 'removeEventListener' does not exist on type 'UISourceCode'.
-node_modules/chrome-devtools-frontend/front_end/bindings/ResourceScriptMapping.js(407,24): error TS2339: Property 'removeEventListener' does not exist on type 'UISourceCode'.
+node_modules/chrome-devtools-frontend/front_end/bindings/ResourceScriptMapping.js(395,12): error TS2339: Property '_scriptSource' does not exist on type 'ResourceScriptFile'.
 node_modules/chrome-devtools-frontend/front_end/bindings/SASSSourceMapping.js(43,52): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Debugger: string; Formatter: string; Network: string; Snippets: string; FileS...'.
 node_modules/chrome-devtools-frontend/front_end/bindings/SASSSourceMapping.js(63,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/bindings/SASSSourceMapping.js(90,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
@@ -3322,47 +3259,36 @@ node_modules/chrome-devtools-frontend/front_end/bindings/StylesSourceMapping.js(
 node_modules/chrome-devtools-frontend/front_end/bindings/StylesSourceMapping.js(111,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/bindings/StylesSourceMapping.js(129,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/bindings/StylesSourceMapping.js(146,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/bindings/StylesSourceMapping.js(192,26): error TS2339: Property 'addEventListener' does not exist on type 'UISourceCode'.
-node_modules/chrome-devtools-frontend/front_end/bindings/StylesSourceMapping.js(194,26): error TS2339: Property 'addEventListener' does not exist on type 'UISourceCode'.
+node_modules/chrome-devtools-frontend/front_end/bindings/StylesSourceMapping.js(189,67): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
+  Type 'StyleFile' is not assignable to type '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
+    Property '_cssModel' does not exist on type '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
 node_modules/chrome-devtools-frontend/front_end/bindings/StylesSourceMapping.js(229,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/bindings/StylesSourceMapping.js(239,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
+node_modules/chrome-devtools-frontend/front_end/bindings/StylesSourceMapping.js(260,9): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...' and 'UISourceCode'.
+node_modules/chrome-devtools-frontend/front_end/bindings/StylesSourceMapping.js(272,9): error TS2365: Operator '!==' cannot be applied to types '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...' and 'UISourceCode'.
+node_modules/chrome-devtools-frontend/front_end/bindings/StylesSourceMapping.js(281,11): error TS2365: Operator '===' cannot be applied to types 'CSSStyleSheetHeader' and '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
 node_modules/chrome-devtools-frontend/front_end/bindings/StylesSourceMapping.js(307,26): error TS2339: Property 'firstValue' does not exist on type 'Set<CSSStyleSheetHeader>'.
 node_modules/chrome-devtools-frontend/front_end/bindings/StylesSourceMapping.js(315,26): error TS2339: Property 'firstValue' does not exist on type 'Set<CSSStyleSheetHeader>'.
 node_modules/chrome-devtools-frontend/front_end/bindings/StylesSourceMapping.js(323,26): error TS2339: Property 'firstValue' does not exist on type 'Set<CSSStyleSheetHeader>'.
 node_modules/chrome-devtools-frontend/front_end/bindings/StylesSourceMapping.js(331,26): error TS2339: Property 'firstValue' does not exist on type 'Set<CSSStyleSheetHeader>'.
 node_modules/chrome-devtools-frontend/front_end/bindings/StylesSourceMapping.js(342,26): error TS2339: Property 'firstValue' does not exist on type 'Set<CSSStyleSheetHeader>'.
+node_modules/chrome-devtools-frontend/front_end/bindings/TempFile.js(85,5): error TS2322: Type 'string | ArrayBuffer' is not assignable to type 'string'.
+  Type 'ArrayBuffer' is not assignable to type 'string'.
 node_modules/chrome-devtools-frontend/front_end/bindings/TempFile.js(91,25): error TS2304: Cannot find name 'FileError'.
 node_modules/chrome-devtools-frontend/front_end/bindings/TempFile.js(96,42): error TS2304: Cannot find name 'FileError'.
 node_modules/chrome-devtools-frontend/front_end/bindings/TempFile.js(176,25): error TS2304: Cannot find name 'FileError'.
 node_modules/chrome-devtools-frontend/front_end/bindings/TempFile.js(185,2): error TS1131: Property or signature expected.
 node_modules/chrome-devtools-frontend/front_end/bindings/TempFile.js(189,33): error TS2339: Property 'Chunk' does not exist on type 'typeof TempFileBackingStorage'.
-node_modules/chrome-devtools-frontend/front_end/bindings_test_runner/AutomappingTestRunner.js(47,8): error TS2339: Property '_workspace' does not exist on type 'typeof BindingsTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/bindings_test_runner/AutomappingTestRunner.js(48,8): error TS2339: Property '_networkProject' does not exist on type 'typeof BindingsTestRunner'.
 node_modules/chrome-devtools-frontend/front_end/bindings_test_runner/AutomappingTestRunner.js(48,26): error TS2554: Expected 5 arguments, but got 4.
-node_modules/chrome-devtools-frontend/front_end/bindings_test_runner/AutomappingTestRunner.js(49,12): error TS2339: Property '_workspace' does not exist on type 'typeof BindingsTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/bindings_test_runner/AutomappingTestRunner.js(52,92): error TS2339: Property '_workspace' does not exist on type 'typeof BindingsTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/bindings_test_runner/AutomappingTestRunner.js(54,8): error TS2339: Property '_failedBindingsCount' does not exist on type 'typeof BindingsTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/bindings_test_runner/AutomappingTestRunner.js(55,8): error TS2339: Property '_automapping' does not exist on type 'typeof BindingsTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/bindings_test_runner/AutomappingTestRunner.js(56,40): error TS2339: Property '_workspace' does not exist on type 'typeof BindingsTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/bindings_test_runner/AutomappingTestRunner.js(56,57): error TS2339: Property '_onBindingAdded' does not exist on type 'typeof BindingsTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/bindings_test_runner/AutomappingTestRunner.js(56,90): error TS2339: Property '_onBindingRemoved' does not exist on type 'typeof BindingsTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/bindings_test_runner/AutomappingTestRunner.js(57,30): error TS2339: Property '_automapping' does not exist on type 'typeof BindingsTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/bindings_test_runner/AutomappingTestRunner.js(57,76): error TS2339: Property '_onBindingFailed' does not exist on type 'typeof BindingsTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/bindings_test_runner/AutomappingTestRunner.js(58,30): error TS2339: Property '_automapping' does not exist on type 'typeof BindingsTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/bindings_test_runner/AutomappingTestRunner.js(58,76): error TS2339: Property '_onSweepHappened' does not exist on type 'typeof BindingsTestRunner'.
 node_modules/chrome-devtools-frontend/front_end/bindings_test_runner/AutomappingTestRunner.js(71,80): error TS2345: Argument of type 'Promise<any>' is not assignable to parameter of type '() => Promise<string>'.
   Type 'Promise<any>' provides no match for the signature '(): Promise<string>'.
 node_modules/chrome-devtools-frontend/front_end/bindings_test_runner/BindingsTestRunner.js(23,20): error TS2339: Property 'caseInsensetiveComparator' does not exist on type 'StringConstructor'.
 node_modules/chrome-devtools-frontend/front_end/bindings_test_runner/BindingsTestRunner.js(48,5): error TS2304: Cannot find name 'addedLines'.
 node_modules/chrome-devtools-frontend/front_end/bindings_test_runner/BindingsTestRunner.js(59,9): error TS2403: Subsequent variable declarations must have the same type.  Variable 'url' must be of type 'any', but here has type 'string'.
 node_modules/chrome-devtools-frontend/front_end/bindings_test_runner/BindingsTestRunner.js(108,11): error TS2339: Property 'src' does not exist on type 'HTMLElement'.
-node_modules/chrome-devtools-frontend/front_end/bindings_test_runner/BindingsTestRunner.js(150,14): error TS2339: Property 'cssModel' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/bindings_test_runner/BindingsTestRunner.js(159,16): error TS2339: Property 'cssModel' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/bindings_test_runner/BindingsTestRunner.js(190,27): error TS2339: Property 'debuggerModel' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/bindings_test_runner/BindingsTestRunner.js(191,32): error TS2339: Property 'debuggerModel' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/bindings_test_runner/BindingsTestRunner.js(197,27): error TS2339: Property 'cssModel' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/bindings_test_runner/IsolatedFilesystemTestRunner.js(15,8): error TS2339: Property 'root' does not exist on type 'typeof BindingsTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/bindings_test_runner/IsolatedFilesystemTestRunner.js(16,8): error TS2339: Property 'fileSystemPath' does not exist on type 'typeof BindingsTestRunner'.
+node_modules/chrome-devtools-frontend/front_end/bindings_test_runner/IsolatedFilesystemTestRunner.js(10,23): error TS2339: Property 'isolatedFileSystem' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/bindings_test_runner/IsolatedFilesystemTestRunner.js(45,27): error TS2551: Property 'events' does not exist on type 'typeof InspectorFrontendHostAPI'. Did you mean 'Events'?
+node_modules/chrome-devtools-frontend/front_end/bindings_test_runner/IsolatedFilesystemTestRunner.js(66,27): error TS2551: Property 'events' does not exist on type 'typeof InspectorFrontendHostAPI'. Did you mean 'Events'?
 node_modules/chrome-devtools-frontend/front_end/bindings_test_runner/IsolatedFilesystemTestRunner.js(103,8): error TS2339: Property '_fileSystem' does not exist on type 'typeof TestFileSystem'.
 node_modules/chrome-devtools-frontend/front_end/bindings_test_runner/IsolatedFilesystemTestRunner.js(104,8): error TS2540: Cannot assign to 'name' because it is a constant or a read-only property.
 node_modules/chrome-devtools-frontend/front_end/bindings_test_runner/IsolatedFilesystemTestRunner.js(105,8): error TS2339: Property '_children' does not exist on type 'typeof TestFileSystem'.
@@ -3370,36 +3296,36 @@ node_modules/chrome-devtools-frontend/front_end/bindings_test_runner/IsolatedFil
 node_modules/chrome-devtools-frontend/front_end/bindings_test_runner/IsolatedFilesystemTestRunner.js(107,8): error TS2339: Property 'isDirectory' does not exist on type 'typeof TestFileSystem'.
 node_modules/chrome-devtools-frontend/front_end/bindings_test_runner/IsolatedFilesystemTestRunner.js(108,8): error TS2339: Property '_timestamp' does not exist on type 'typeof TestFileSystem'.
 node_modules/chrome-devtools-frontend/front_end/bindings_test_runner/IsolatedFilesystemTestRunner.js(109,8): error TS2339: Property '_parent' does not exist on type 'typeof TestFileSystem'.
+node_modules/chrome-devtools-frontend/front_end/bindings_test_runner/IsolatedFilesystemTestRunner.js(134,27): error TS2551: Property 'events' does not exist on type 'typeof InspectorFrontendHostAPI'. Did you mean 'Events'?
+node_modules/chrome-devtools-frontend/front_end/bindings_test_runner/IsolatedFilesystemTestRunner.js(159,27): error TS2551: Property 'events' does not exist on type 'typeof InspectorFrontendHostAPI'. Did you mean 'Events'?
+node_modules/chrome-devtools-frontend/front_end/bindings_test_runner/IsolatedFilesystemTestRunner.js(172,27): error TS2551: Property 'events' does not exist on type 'typeof InspectorFrontendHostAPI'. Did you mean 'Events'?
 node_modules/chrome-devtools-frontend/front_end/bindings_test_runner/IsolatedFilesystemTestRunner.js(263,8): error TS2339: Property '_children' does not exist on type 'typeof TestFileSystem'.
 node_modules/chrome-devtools-frontend/front_end/bindings_test_runner/IsolatedFilesystemTestRunner.js(275,8): error TS2551: Property '_entry' does not exist on type 'typeof TestFileSystem'. Did you mean 'Entry'?
 node_modules/chrome-devtools-frontend/front_end/bindings_test_runner/IsolatedFilesystemTestRunner.js(276,8): error TS2339: Property '_modificationTimesDelta' does not exist on type 'typeof TestFileSystem'.
 node_modules/chrome-devtools-frontend/front_end/bindings_test_runner/OverridesTestRunner.js(7,13): error TS1064: The return type of an async function or method must be the global Promise<T> type.
 node_modules/chrome-devtools-frontend/front_end/bindings_test_runner/PersistenceTestRunner.js(76,79): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Debugger: string; Formatter: string; Network: string; Snippets: string; FileS...'.
 node_modules/chrome-devtools-frontend/front_end/bindings_test_runner/PersistenceTestRunner.js(77,82): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Debugger: string; Formatter: string; Network: string; Snippets: string; FileS...'.
-node_modules/chrome-devtools-frontend/front_end/changes/ChangesHighlighter.js(7,51): error TS2694: Namespace 'ChangesView' has no exported member 'Row'.
+node_modules/chrome-devtools-frontend/front_end/changes/ChangesHighlighter.js(7,51): error TS2694: Namespace 'Changes.ChangesView' has no exported member 'Row'.
 node_modules/chrome-devtools-frontend/front_end/changes/ChangesHighlighter.js(9,2): error TS1131: Property or signature expected.
-node_modules/chrome-devtools-frontend/front_end/changes/ChangesHighlighter.js(22,42): error TS2694: Namespace 'ChangesHighlighter' has no exported member 'DiffState'.
+node_modules/chrome-devtools-frontend/front_end/changes/ChangesHighlighter.js(22,42): error TS2694: Namespace 'Changes.ChangesHighlighter' has no exported member 'DiffState'.
 node_modules/chrome-devtools-frontend/front_end/changes/ChangesHighlighter.js(47,47): error TS2339: Property 'blankLine' does not exist on type 'void'.
 node_modules/chrome-devtools-frontend/front_end/changes/ChangesHighlighter.js(48,29): error TS2339: Property 'blankLine' does not exist on type 'void'.
 node_modules/chrome-devtools-frontend/front_end/changes/ChangesHighlighter.js(50,29): error TS2339: Property 'token' does not exist on type 'void'.
-node_modules/chrome-devtools-frontend/front_end/changes/ChangesHighlighter.js(59,45): error TS2694: Namespace 'ChangesHighlighter' has no exported member 'DiffState'.
-node_modules/chrome-devtools-frontend/front_end/changes/ChangesHighlighter.js(78,44): error TS2694: Namespace 'ChangesHighlighter' has no exported member 'DiffState'.
+node_modules/chrome-devtools-frontend/front_end/changes/ChangesHighlighter.js(59,45): error TS2694: Namespace 'Changes.ChangesHighlighter' has no exported member 'DiffState'.
+node_modules/chrome-devtools-frontend/front_end/changes/ChangesHighlighter.js(78,44): error TS2694: Namespace 'Changes.ChangesHighlighter' has no exported member 'DiffState'.
 node_modules/chrome-devtools-frontend/front_end/changes/ChangesHighlighter.js(102,51): error TS2339: Property 'token' does not exist on type 'void'.
-node_modules/chrome-devtools-frontend/front_end/changes/ChangesHighlighter.js(129,44): error TS2694: Namespace 'ChangesHighlighter' has no exported member 'DiffState'.
+node_modules/chrome-devtools-frontend/front_end/changes/ChangesHighlighter.js(129,44): error TS2694: Namespace 'Changes.ChangesHighlighter' has no exported member 'DiffState'.
 node_modules/chrome-devtools-frontend/front_end/changes/ChangesHighlighter.js(142,31): error TS2339: Property 'blankLine' does not exist on type 'void'.
 node_modules/chrome-devtools-frontend/front_end/changes/ChangesHighlighter.js(144,39): error TS2339: Property 'blankLine' does not exist on type 'void'.
 node_modules/chrome-devtools-frontend/front_end/changes/ChangesHighlighter.js(147,39): error TS2339: Property 'blankLine' does not exist on type 'void'.
-node_modules/chrome-devtools-frontend/front_end/changes/ChangesHighlighter.js(155,44): error TS2694: Namespace 'ChangesHighlighter' has no exported member 'DiffState'.
-node_modules/chrome-devtools-frontend/front_end/changes/ChangesHighlighter.js(156,45): error TS2694: Namespace 'ChangesHighlighter' has no exported member 'DiffState'.
-node_modules/chrome-devtools-frontend/front_end/changes/ChangesHighlighter.js(162,53): error TS2694: Namespace 'ChangesHighlighter' has no exported member 'DiffState'.
+node_modules/chrome-devtools-frontend/front_end/changes/ChangesHighlighter.js(155,44): error TS2694: Namespace 'Changes.ChangesHighlighter' has no exported member 'DiffState'.
+node_modules/chrome-devtools-frontend/front_end/changes/ChangesHighlighter.js(156,45): error TS2694: Namespace 'Changes.ChangesHighlighter' has no exported member 'DiffState'.
+node_modules/chrome-devtools-frontend/front_end/changes/ChangesHighlighter.js(162,53): error TS2694: Namespace 'Changes.ChangesHighlighter' has no exported member 'DiffState'.
 node_modules/chrome-devtools-frontend/front_end/changes/ChangesHighlighter.js(169,2): error TS1131: Property or signature expected.
 node_modules/chrome-devtools-frontend/front_end/changes/ChangesHighlighter.js(181,28): error TS2339: Property 'DiffState' does not exist on type '(config: any, parserConfig: { diffRows: any[]; baselineLines: string[]; currentLines: string[]; m...'.
 node_modules/chrome-devtools-frontend/front_end/changes/ChangesSidebar.js(30,90): error TS2339: Property 'uiSourceCode' does not exist on type 'TreeElement'.
 node_modules/chrome-devtools-frontend/front_end/changes/ChangesSidebar.js(38,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/changes/ChangesSidebar.js(101,20): error TS2339: Property 'addEventListener' does not exist on type 'UISourceCode'.
-node_modules/chrome-devtools-frontend/front_end/changes/ChangesSidebar.js(102,20): error TS2339: Property 'addEventListener' does not exist on type 'UISourceCode'.
-node_modules/chrome-devtools-frontend/front_end/changes/ChangesSidebar.js(103,20): error TS2339: Property 'addEventListener' does not exist on type 'UISourceCode'.
-node_modules/chrome-devtools-frontend/front_end/changes/ChangesView.js(26,44): error TS2694: Namespace 'ChangesView' has no exported member 'Row'.
+node_modules/chrome-devtools-frontend/front_end/changes/ChangesView.js(26,44): error TS2694: Namespace 'Changes.ChangesView' has no exported member 'Row'.
 node_modules/chrome-devtools-frontend/front_end/changes/ChangesView.js(37,42): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/changes/ChangesView.js(43,45): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/changes/ChangesView.js(45,37): error TS2345: Argument of type 'ToolbarButton' is not assignable to parameter of type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
@@ -3420,19 +3346,19 @@ node_modules/chrome-devtools-frontend/front_end/changes/ChangesView.js(167,25):
 node_modules/chrome-devtools-frontend/front_end/changes/ChangesView.js(170,28): error TS2339: Property 'pushAll' does not exist on type 'any[]'.
 node_modules/chrome-devtools-frontend/front_end/changes/ChangesView.js(172,26): error TS2339: Property 'pushAll' does not exist on type 'any[]'.
 node_modules/chrome-devtools-frontend/front_end/changes/ChangesView.js(175,51): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Deletion: string; Addition: string; Equal: string; Spacer: string; }'.
-node_modules/chrome-devtools-frontend/front_end/changes/ChangesView.js(206,45): error TS2694: Namespace 'ChangesView' has no exported member 'Row'.
+node_modules/chrome-devtools-frontend/front_end/changes/ChangesView.js(206,45): error TS2694: Namespace 'Changes.ChangesView' has no exported member 'Row'.
 node_modules/chrome-devtools-frontend/front_end/changes/ChangesView.js(212,46): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Deletion: string; Addition: string; Equal: string; Spacer: string; }'.
 node_modules/chrome-devtools-frontend/front_end/changes/ChangesView.js(215,15): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/changes/ChangesView.js(216,19): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/changes/ChangesView.js(217,15): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Deletion: string; Addition: string; Equal: string; Spacer: string; }'.
 node_modules/chrome-devtools-frontend/front_end/changes/ChangesView.js(231,46): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Deletion: string; Addition: string; Equal: string; Spacer: string; }'.
-node_modules/chrome-devtools-frontend/front_end/changes/ChangesView.js(239,45): error TS2694: Namespace 'ChangesView' has no exported member 'Row'.
+node_modules/chrome-devtools-frontend/front_end/changes/ChangesView.js(239,45): error TS2694: Namespace 'Changes.ChangesView' has no exported member 'Row'.
 node_modules/chrome-devtools-frontend/front_end/changes/ChangesView.js(243,41): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Deletion: string; Addition: string; Equal: string; Spacer: string; }'.
 node_modules/chrome-devtools-frontend/front_end/changes/ChangesView.js(244,42): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Deletion: string; Addition: string; Equal: string; Spacer: string; }'.
 node_modules/chrome-devtools-frontend/front_end/changes/ChangesView.js(253,45): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Deletion: string; Addition: string; Equal: string; Spacer: string; }'.
 node_modules/chrome-devtools-frontend/front_end/changes/ChangesView.js(255,46): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Deletion: string; Addition: string; Equal: string; Spacer: string; }'.
-node_modules/chrome-devtools-frontend/front_end/changes/ChangesView.js(269,37): error TS2694: Namespace 'ChangesView' has no exported member 'RowType'.
-node_modules/chrome-devtools-frontend/front_end/changes/ChangesView.js(270,38): error TS2694: Namespace 'ChangesView' has no exported member 'Row'.
+node_modules/chrome-devtools-frontend/front_end/changes/ChangesView.js(269,37): error TS2694: Namespace 'Changes.ChangesView' has no exported member 'RowType'.
+node_modules/chrome-devtools-frontend/front_end/changes/ChangesView.js(270,38): error TS2694: Namespace 'Changes.ChangesView' has no exported member 'Row'.
 node_modules/chrome-devtools-frontend/front_end/changes/ChangesView.js(273,11): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; Deletion: string; Addition: string; Equal: string; Spacer: string; }' and 'string'.
 node_modules/chrome-devtools-frontend/front_end/changes/ChangesView.js(275,11): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; Deletion: string; Addition: string; Equal: string; Spacer: string; }' and 'string'.
 node_modules/chrome-devtools-frontend/front_end/changes/ChangesView.js(277,11): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; Deletion: string; Addition: string; Equal: string; Spacer: string; }' and 'string'.
@@ -3524,6 +3450,8 @@ node_modules/chrome-devtools-frontend/front_end/cm/codemirror.js(6378,11): error
 node_modules/chrome-devtools-frontend/front_end/cm/codemirror.js(6391,10): error TS2339: Property 'linked' does not exist on type 'Doc'.
 node_modules/chrome-devtools-frontend/front_end/cm/codemirror.js(6454,39): error TS2339: Property 'FileReader' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/cm/codemirror.js(6454,60): error TS2339: Property 'File' does not exist on type 'Window'.
+node_modules/chrome-devtools-frontend/front_end/cm/codemirror.js(6464,44): error TS2345: Argument of type 'string | ArrayBuffer' is not assignable to parameter of type 'string'.
+  Type 'ArrayBuffer' is not assignable to type 'string'.
 node_modules/chrome-devtools-frontend/front_end/cm/codemirror.js(6553,25): error TS2339: Property 'CodeMirror' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/cm/codemirror.js(7343,11): error TS2339: Property 'copy' does not exist on type '(...args: any[]) => any'.
 node_modules/chrome-devtools-frontend/front_end/cm/codemirror.js(7777,11): error TS2339: Property 'wrapper' does not exist on type 'Display'.
@@ -3602,7 +3530,7 @@ node_modules/chrome-devtools-frontend/front_end/cm_modes/coffeescript.js(11,19):
 node_modules/chrome-devtools-frontend/front_end/cm_modes/coffeescript.js(11,43): error TS2304: Cannot find name 'define'.
 node_modules/chrome-devtools-frontend/front_end/cm_modes/coffeescript.js(12,5): error TS2304: Cannot find name 'define'.
 node_modules/chrome-devtools-frontend/front_end/cm_modes/coffeescript.js(41,3): error TS2322: Type 'RegExp' is not assignable to type 'string[]'.
-  Property 'flatMap' is missing in type 'RegExp'.
+  Property 'length' is missing in type 'RegExp'.
 node_modules/chrome-devtools-frontend/front_end/cm_modes/coffeescript.js(282,24): error TS2339: Property 'exec' does not exist on type 'string[]'.
 node_modules/chrome-devtools-frontend/front_end/cm_modes/jsx.js(6,5): error TS2554: Expected 0-1 arguments, but got 3.
 node_modules/chrome-devtools-frontend/front_end/cm_modes/jsx.js(6,17): error TS2307: Cannot find module '../../lib/codemirror'.
@@ -3678,16 +3606,18 @@ node_modules/chrome-devtools-frontend/front_end/color_picker/ContrastDetails.js(
   Type 'ToolbarToggle' is not assignable to type '{ [x: string]: any; item(): any & any; }'.
 node_modules/chrome-devtools-frontend/front_end/color_picker/ContrastDetails.js(125,27): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/color_picker/ContrastDetails.js(136,28): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/color_picker/ContrastDetails.js(151,27): error TS2339: Property 'openInNewTab' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/color_picker/ContrastDetails.js(151,27): error TS2339: Property 'openInNewTab' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/color_picker/ContrastDetails.js(178,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/color_picker/ContrastDetails.js(191,11): error TS2339: Property 'consume' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/color_picker/ContrastDetails.js(201,35): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/color_picker/ContrastDetails.js(207,35): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/color_picker/ContrastDetails.js(232,27): error TS2339: Property 'setEyeDropperActive' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/color_picker/ContrastDetails.js(232,27): error TS2339: Property 'setEyeDropperActive' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/color_picker/ContrastDetails.js(234,29): error TS2551: Property 'events' does not exist on type 'typeof InspectorFrontendHostAPI'. Did you mean 'Events'?
+node_modules/chrome-devtools-frontend/front_end/color_picker/ContrastDetails.js(237,29): error TS2551: Property 'events' does not exist on type 'typeof InspectorFrontendHostAPI'. Did you mean 'Events'?
 node_modules/chrome-devtools-frontend/front_end/color_picker/ContrastDetails.js(243,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/color_picker/ContrastDetails.js(251,27): error TS2339: Property 'bringToFront' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/color_picker/ContrastDetails.js(251,27): error TS2339: Property 'bringToFront' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/color_picker/ContrastDetails.js(261,41): error TS2339: Property 'createChild' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/color_picker/ContrastInfo.js(32,28): error TS2694: Namespace 'CSSModel' has no exported member 'ContrastInfo'.
+node_modules/chrome-devtools-frontend/front_end/color_picker/ContrastInfo.js(32,28): error TS2694: Namespace 'SDK.CSSModel' has no exported member 'ContrastInfo'.
 node_modules/chrome-devtools-frontend/front_end/color_picker/ContrastInfo.js(124,53): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Original: string; Nickname: string; HEX: string; ShortHEX: string; HEXA: stri...'.
 node_modules/chrome-devtools-frontend/front_end/color_picker/ContrastOverlay.js(16,41): error TS2339: Property 'createSVGChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(38,32): error TS2339: Property 'createSVGChild' does not exist on type 'Element'.
@@ -3699,7 +3629,7 @@ node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(64,31):
   Type 'ToolbarToggle' is not assignable to type '{ [x: string]: any; item(): any & any; }'.
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(84,18): error TS2339: Property 'maxLength' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(97,20): error TS2339: Property 'maxLength' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(126,52): error TS2694: Namespace 'Spectrum' has no exported member 'Palette'.
+node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(126,52): error TS2694: Namespace 'ColorPicker.Spectrum' has no exported member 'Palette'.
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(128,46): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(130,57): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(133,49): error TS2339: Property 'createChild' does not exist on type 'Element'.
@@ -3709,23 +3639,32 @@ node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(146,39)
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(150,47): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(152,45): error TS2345: Argument of type 'ToolbarButton' is not assignable to parameter of type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
   Type 'ToolbarButton' is not assignable to type '{ [x: string]: any; item(): any & any; }'.
+node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(166,12): error TS2339: Property '_hueAlphaLeft' does not exist on type 'Spectrum'.
+node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(167,12): error TS2339: Property '_colorOffset' does not exist on type 'Spectrum'.
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(178,24): error TS2339: Property 'constrain' does not exist on type 'NumberConstructor'.
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(178,45): error TS2339: Property 'x' does not exist on type 'Event'.
+node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(178,54): error TS2339: Property '_hueAlphaLeft' does not exist on type 'Spectrum'.
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(187,40): error TS2339: Property 'x' does not exist on type 'Event'.
+node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(187,49): error TS2339: Property '_hueAlphaLeft' does not exist on type 'Spectrum'.
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(189,24): error TS2339: Property 'constrain' does not exist on type 'NumberConstructor'.
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(199,24): error TS2339: Property 'constrain' does not exist on type 'NumberConstructor'.
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(199,41): error TS2339: Property 'x' does not exist on type 'Event'.
+node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(199,50): error TS2339: Property '_colorOffset' does not exist on type 'Spectrum'.
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(200,24): error TS2339: Property 'constrain' does not exist on type 'NumberConstructor'.
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(200,45): error TS2339: Property 'y' does not exist on type 'Event'.
+node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(200,54): error TS2339: Property '_colorOffset' does not exist on type 'Spectrum'.
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(217,25): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(221,31): error TS2345: Argument of type 'ToolbarButton' is not assignable to parameter of type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
   Type 'ToolbarButton' is not assignable to type '{ [x: string]: any; item(): any & any; }'.
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(241,27): error TS2339: Property 'focus' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(251,13): error TS2339: Property 'style' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(251,39): error TS2339: Property 'sprintf' does not exist on type 'StringConstructor'.
-node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(253,15): error TS2339: Property 'animate' does not exist on type 'Element'.
+node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(253,23): error TS2345: Argument of type '{ opacity: number; }[]' is not assignable to parameter of type 'PropertyIndexedKeyframes | Keyframe[]'.
+  Type '{ opacity: number; }[]' is not assignable to type 'Keyframe[]'.
+    Type '{ opacity: number; }' is not assignable to type 'Keyframe'.
+      Property 'alignContent' is missing in type '{ opacity: number; }'.
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(254,13): error TS2339: Property 'title' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(259,36): error TS2694: Namespace 'Spectrum' has no exported member 'Palette'.
+node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(259,36): error TS2694: Namespace 'ColorPicker.Spectrum' has no exported member 'Palette'.
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(272,22): error TS2339: Property '__mutable' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(273,22): error TS2339: Property '__color' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(277,35): error TS2339: Property 'createChild' does not exist on type 'Element'.
@@ -3745,12 +3684,12 @@ node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(387,11)
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(387,65): error TS2339: Property 'pageY' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(390,21): error TS2339: Property 'pageX' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(392,11): error TS2339: Property 'pageY' does not exist on type 'Event'.
-node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(453,38): error TS2694: Namespace 'Spectrum' has no exported member 'Palette'.
-node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(466,36): error TS2694: Namespace 'Spectrum' has no exported member 'Palette'.
-node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(481,36): error TS2694: Namespace 'Spectrum' has no exported member 'Palette'.
+node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(453,38): error TS2694: Namespace 'ColorPicker.Spectrum' has no exported member 'Palette'.
+node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(466,36): error TS2694: Namespace 'ColorPicker.Spectrum' has no exported member 'Palette'.
+node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(481,36): error TS2694: Namespace 'ColorPicker.Spectrum' has no exported member 'Palette'.
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(487,39): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(492,22): error TS2339: Property 'createChild' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(498,36): error TS2694: Namespace 'Spectrum' has no exported member 'Palette'.
+node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(498,36): error TS2694: Namespace 'ColorPicker.Spectrum' has no exported member 'Palette'.
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(528,18): error TS2339: Property 'style' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(541,34): error TS2345: Argument of type 'string | { [x: string]: any; Original: string; Nickname: string; HEX: string; ShortHEX: string; H...' is not assignable to parameter of type 'string'.
   Type '{ [x: string]: any; Original: string; Nickname: string; HEX: string; ShortHEX: string; HEXA: stri...' is not assignable to type 'string'.
@@ -3758,7 +3697,7 @@ node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(546,22)
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(565,11): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(567,11): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(570,9): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(598,28): error TS2694: Namespace 'CSSModel' has no exported member 'ContrastInfo'.
+node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(598,28): error TS2694: Namespace 'SDK.CSSModel' has no exported member 'ContrastInfo'.
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(714,24): error TS2339: Property 'value' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(716,24): error TS2339: Property 'value' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(745,16): error TS2339: Property 'sprintf' does not exist on type 'StringConstructor'.
@@ -3772,19 +3711,20 @@ node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(782,36)
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(786,28): error TS2339: Property 'sprintf' does not exist on type 'StringConstructor'.
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(796,52): error TS2345: Argument of type '{ [x: string]: any; Original: string; Nickname: string; HEX: string; ShortHEX: string; HEXA: stri...' is not assignable to parameter of type 'string'.
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(821,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(827,27): error TS2339: Property 'setEyeDropperActive' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(827,27): error TS2339: Property 'setEyeDropperActive' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(829,29): error TS2551: Property 'events' does not exist on type 'typeof InspectorFrontendHostAPI'. Did you mean 'Events'?
+node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(832,29): error TS2551: Property 'events' does not exist on type 'typeof InspectorFrontendHostAPI'. Did you mean 'Events'?
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(838,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(845,27): error TS2339: Property 'bringToFront' does not exist on type 'typeof InspectorFrontendHost'.
-node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(864,77): error TS1003: Identifier expected.
+node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(845,27): error TS2339: Property 'bringToFront' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(865,22): error TS2339: Property 'Palette' does not exist on type 'typeof Spectrum'.
-node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(870,45): error TS2694: Namespace 'Spectrum' has no exported member 'Palette'.
+node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(870,45): error TS2694: Namespace 'ColorPicker.Spectrum' has no exported member 'Palette'.
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(881,37): error TS2339: Property 'catchException' does not exist on type 'Promise<any[]>'.
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(918,37): error TS2339: Property 'keysArray' does not exist on type 'Map<string, number>'.
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(933,29): error TS2339: Property 'keysArray' does not exist on type 'Map<string, Color>'.
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(1009,39): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(1016,34): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(1038,27): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHost'.
-node_modules/chrome-devtools-frontend/front_end/common/Color.js(36,28): error TS2694: Namespace 'Color' has no exported member 'Format'.
+node_modules/chrome-devtools-frontend/front_end/color_picker/Spectrum.js(1038,27): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/common/Color.js(36,28): error TS2694: Namespace 'Common.Color' has no exported member 'Format'.
 node_modules/chrome-devtools-frontend/front_end/common/Color.js(91,65): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Original: string; Nickname: string; HEX: string; ShortHEX: string; HEXA: stri...'.
 node_modules/chrome-devtools-frontend/front_end/common/Color.js(99,11): error TS2322: Type 'string' is not assignable to type '{ [x: string]: any; Original: string; Nickname: string; HEX: string; ShortHEX: string; HEXA: stri...'.
 node_modules/chrome-devtools-frontend/front_end/common/Color.js(133,13): error TS2403: Subsequent variable declarations must have the same type.  Variable 'rgba' must be of type 'any', but here has type 'number[]'.
@@ -3804,11 +3744,11 @@ node_modules/chrome-devtools-frontend/front_end/common/Color.js(369,82): error T
 node_modules/chrome-devtools-frontend/front_end/common/Color.js(371,82): error TS2339: Property '_blendedFg' does not exist on type '(fgRGBA: number[], bgRGBA: number[]) => number'.
 node_modules/chrome-devtools-frontend/front_end/common/Color.js(375,61): error TS2339: Property '_blendedFg' does not exist on type '(fgRGBA: number[], bgRGBA: number[]) => number'.
 node_modules/chrome-devtools-frontend/front_end/common/Color.js(376,43): error TS2339: Property '_blendedFg' does not exist on type '(fgRGBA: number[], bgRGBA: number[]) => number'.
-node_modules/chrome-devtools-frontend/front_end/common/Color.js(409,29): error TS2694: Namespace 'Color' has no exported member 'Format'.
+node_modules/chrome-devtools-frontend/front_end/common/Color.js(409,29): error TS2694: Namespace 'Common.Color' has no exported member 'Format'.
 node_modules/chrome-devtools-frontend/front_end/common/Color.js(426,5): error TS2322: Type 'string | { [x: string]: any; Original: string; Nickname: string; HEX: string; ShortHEX: string; H...' is not assignable to type '{ [x: string]: any; Original: string; Nickname: string; HEX: string; ShortHEX: string; HEXA: stri...'.
   Type 'string' is not assignable to type '{ [x: string]: any; Original: string; Nickname: string; HEX: string; ShortHEX: string; HEXA: stri...'.
-node_modules/chrome-devtools-frontend/front_end/common/Color.js(430,29): error TS2694: Namespace 'Color' has no exported member 'Format'.
-node_modules/chrome-devtools-frontend/front_end/common/Color.js(503,29): error TS2694: Namespace 'Color' has no exported member 'Format'.
+node_modules/chrome-devtools-frontend/front_end/common/Color.js(430,29): error TS2694: Namespace 'Common.Color' has no exported member 'Format'.
+node_modules/chrome-devtools-frontend/front_end/common/Color.js(503,29): error TS2694: Namespace 'Common.Color' has no exported member 'Format'.
 node_modules/chrome-devtools-frontend/front_end/common/Color.js(518,7): error TS2322: Type 'string' is not assignable to type '{ [x: string]: any; Original: string; Nickname: string; HEX: string; ShortHEX: string; HEXA: stri...'.
 node_modules/chrome-devtools-frontend/front_end/common/Color.js(519,5): error TS2322: Type 'string' is not assignable to type '{ [x: string]: any; Original: string; Nickname: string; HEX: string; ShortHEX: string; HEXA: stri...'.
 node_modules/chrome-devtools-frontend/front_end/common/Color.js(563,23): error TS2339: Property 'sprintf' does not exist on type 'StringConstructor'.
@@ -3826,9 +3766,9 @@ node_modules/chrome-devtools-frontend/front_end/common/Color.js(640,23): error T
 node_modules/chrome-devtools-frontend/front_end/common/Color.js(641,20): error TS2339: Property '_rgbaToNickname' does not exist on type 'typeof Color'.
 node_modules/chrome-devtools-frontend/front_end/common/Color.js(646,22): error TS2339: Property '_rgbaToNickname' does not exist on type 'typeof Color'.
 node_modules/chrome-devtools-frontend/front_end/common/Color.js(650,25): error TS2339: Property '_rgbaToNickname' does not exist on type 'typeof Color'.
-node_modules/chrome-devtools-frontend/front_end/common/Color.js(661,5): error TS2322: Type '{ [x: string]: any; r: number; g: number; b: number; }' is not assignable to type '{ r: number; g: number; b: number; a: number; }'.
 node_modules/chrome-devtools-frontend/front_end/common/Color.js(661,5): error TS2322: Type '{ [x: string]: any; r: number; g: number; b: number; }' is not assignable to type '{ r: number; g: number; b: number; a: number; }'.
   Property 'a' is missing in type '{ [x: string]: any; r: number; g: number; b: number; }'.
+node_modules/chrome-devtools-frontend/front_end/common/Color.js(661,5): error TS2322: Type '{ [x: string]: any; r: number; g: number; b: number; }' is not assignable to type '{ r: number; g: number; b: number; a: number; }'.
 node_modules/chrome-devtools-frontend/front_end/common/Color.js(673,35): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Original: string; Nickname: string; HEX: string; ShortHEX: string; HEXA: stri...'.
 node_modules/chrome-devtools-frontend/front_end/common/Color.js(683,35): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Original: string; Nickname: string; HEX: string; ShortHEX: string; HEXA: stri...'.
 node_modules/chrome-devtools-frontend/front_end/common/Color.js(693,35): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Original: string; Nickname: string; HEX: string; ShortHEX: string; HEXA: stri...'.
@@ -3839,47 +3779,41 @@ node_modules/chrome-devtools-frontend/front_end/common/Color.js(935,45): error T
   Type '{ min: number; max: number; }' is not assignable to type 'number | { min: number; max: number; count: number; }'.
     Type '{ min: number; max: number; }' is not assignable to type '{ min: number; max: number; count: number; }'.
       Property 'count' is missing in type '{ min: number; max: number; }'.
-node_modules/chrome-devtools-frontend/front_end/common/Console.js(16,30): error TS2694: Namespace 'Console' has no exported member 'MessageLevel'.
+node_modules/chrome-devtools-frontend/front_end/common/Console.js(16,30): error TS2694: Namespace 'Common.Console' has no exported member 'MessageLevel'.
 node_modules/chrome-devtools-frontend/front_end/common/Console.js(21,42): error TS2345: Argument of type 'string | { [x: string]: any; Info: string; Warning: string; Error: string; }' is not assignable to parameter of type '{ [x: string]: any; Info: string; Warning: string; Error: string; }'.
   Type 'string' is not assignable to type '{ [x: string]: any; Info: string; Warning: string; Error: string; }'.
 node_modules/chrome-devtools-frontend/front_end/common/Console.js(30,27): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Info: string; Warning: string; Error: string; }'.
 node_modules/chrome-devtools-frontend/front_end/common/Console.js(37,27): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Info: string; Warning: string; Error: string; }'.
 node_modules/chrome-devtools-frontend/front_end/common/Console.js(44,27): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Info: string; Warning: string; Error: string; }'.
-node_modules/chrome-devtools-frontend/front_end/common/Console.js(86,30): error TS2694: Namespace 'Console' has no exported member 'MessageLevel'.
+node_modules/chrome-devtools-frontend/front_end/common/Console.js(86,30): error TS2694: Namespace 'Common.Console' has no exported member 'MessageLevel'.
 node_modules/chrome-devtools-frontend/front_end/common/ContentProvider.js(37,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 node_modules/chrome-devtools-frontend/front_end/common/ContentProvider.js(42,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 node_modules/chrome-devtools-frontend/front_end/common/ContentProvider.js(47,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 node_modules/chrome-devtools-frontend/front_end/common/ContentProvider.js(52,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 node_modules/chrome-devtools-frontend/front_end/common/ContentProvider.js(60,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
-node_modules/chrome-devtools-frontend/front_end/common/ModuleExtensionInterfaces.js(12,31): error TS2694: Namespace 'Renderer' has no exported member 'Options'.
+node_modules/chrome-devtools-frontend/front_end/common/ModuleExtensionInterfaces.js(12,31): error TS2694: Namespace 'Common.Renderer' has no exported member 'Options'.
 node_modules/chrome-devtools-frontend/front_end/common/ModuleExtensionInterfaces.js(13,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
-node_modules/chrome-devtools-frontend/front_end/common/ModuleExtensionInterfaces.js(20,29): error TS2694: Namespace 'Renderer' has no exported member 'Options'.
+node_modules/chrome-devtools-frontend/front_end/common/ModuleExtensionInterfaces.js(20,29): error TS2694: Namespace 'Common.Renderer' has no exported member 'Options'.
 node_modules/chrome-devtools-frontend/front_end/common/ModuleExtensionInterfaces.js(27,15): error TS2339: Property 'runtime' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/common/ModuleExtensionInterfaces.js(39,2): error TS1131: Property or signature expected.
 node_modules/chrome-devtools-frontend/front_end/common/ModuleExtensionInterfaces.js(40,17): error TS2300: Duplicate identifier 'Options'.
-node_modules/chrome-devtools-frontend/front_end/common/ModuleExtensionInterfaces.js(40,17): error TS2339: Property 'Options' does not exist on type '{ (): void; renderPromise(object: any, options?: any): Promise<Element>; }'.
+node_modules/chrome-devtools-frontend/front_end/common/ModuleExtensionInterfaces.js(40,17): error TS2339: Property 'Options' does not exist on type '{ (): void; prototype: { [x: string]: any; }; renderPromise(object: any, options?: any): Promise<...'.
 node_modules/chrome-devtools-frontend/front_end/common/ModuleExtensionInterfaces.js(63,15): error TS2339: Property 'runtime' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/common/ModuleExtensionInterfaces.js(81,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 node_modules/chrome-devtools-frontend/front_end/common/ModuleExtensionInterfaces.js(105,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
-node_modules/chrome-devtools-frontend/front_end/common/Object.js(32,52): error TS2694: Namespace 'Object' has no exported member '_listenerCallbackTuple'.
+node_modules/chrome-devtools-frontend/front_end/common/Object.js(32,52): error TS2694: Namespace 'Common.Object' has no exported member '_listenerCallbackTuple'.
 node_modules/chrome-devtools-frontend/front_end/common/Object.js(39,31): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/common/Object.js(41,35): error TS2694: Namespace 'EventTarget' has no exported member 'EventDescriptor'.
+node_modules/chrome-devtools-frontend/front_end/common/Object.js(41,35): error TS2694: Namespace 'Common.EventTarget' has no exported member 'EventDescriptor'.
 node_modules/chrome-devtools-frontend/front_end/common/Object.js(73,31): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/common/Object.js(109,36): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/common/Object.js(118,2): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/common/Object.js(119,8): error TS2300: Duplicate identifier 'Event'.
-node_modules/chrome-devtools-frontend/front_end/common/Object.js(119,8): error TS2339: Property 'Event' does not exist on type 'typeof Common'.
 node_modules/chrome-devtools-frontend/front_end/common/Object.js(122,76): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/common/Object.js(123,2): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/common/Object.js(124,15): error TS2339: Property '_listenerCallbackTuple' does not exist on type 'typeof Object'.
 node_modules/chrome-devtools-frontend/front_end/common/Object.js(132,129): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/common/Object.js(133,2): error TS1003: Identifier expected.
-node_modules/chrome-devtools-frontend/front_end/common/Object.js(134,20): error TS2339: Property 'EventDescriptor' does not exist on type '{ (): void; removeEventListeners(eventList: any[]): void; }'.
-node_modules/chrome-devtools-frontend/front_end/common/Object.js(137,39): error TS2694: Namespace 'EventTarget' has no exported member 'EventDescriptor'.
-node_modules/chrome-devtools-frontend/front_end/common/Object.js(151,31): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/common/Object.js(153,35): error TS2694: Namespace 'EventTarget' has no exported member 'EventDescriptor'.
+node_modules/chrome-devtools-frontend/front_end/common/Object.js(134,20): error TS2339: Property 'EventDescriptor' does not exist on type '{ (): void; removeEventListeners(eventList: any[]): void; prototype: { [x: string]: any; }; }'.
+node_modules/chrome-devtools-frontend/front_end/common/Object.js(137,39): error TS2694: Namespace 'Common.EventTarget' has no exported member 'EventDescriptor'.
+node_modules/chrome-devtools-frontend/front_end/common/Object.js(153,35): error TS2694: Namespace 'Common.EventTarget' has no exported member 'EventDescriptor'.
 node_modules/chrome-devtools-frontend/front_end/common/Object.js(159,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
-node_modules/chrome-devtools-frontend/front_end/common/Object.js(165,31): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/common/Object.js(172,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 node_modules/chrome-devtools-frontend/front_end/common/OutputStream.js(13,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 node_modules/chrome-devtools-frontend/front_end/common/ParsedURL.js(122,26): error TS2339: Property '_urlRegexInstance' does not exist on type 'typeof ParsedURL'.
@@ -3916,7 +3850,6 @@ node_modules/chrome-devtools-frontend/front_end/common/Settings.js(535,18): erro
 node_modules/chrome-devtools-frontend/front_end/common/Settings.js(541,18): error TS2339: Property 'horizontal' does not exist on type '{}'.
 node_modules/chrome-devtools-frontend/front_end/common/Settings.js(542,18): error TS2339: Property 'horizontal' does not exist on type '{}'.
 node_modules/chrome-devtools-frontend/front_end/common/Throttler.js(102,5): error TS2322: Type 'Timer' is not assignable to type 'number'.
-node_modules/chrome-devtools-frontend/front_end/common/Throttler.js(113,34): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/common/Throttler.js(114,18): error TS2339: Property 'FinishCallback' does not exist on type 'typeof Throttler'.
 node_modules/chrome-devtools-frontend/front_end/common/UIString.js(40,17): error TS2339: Property 'vsprintf' does not exist on type 'StringConstructor'.
 node_modules/chrome-devtools-frontend/front_end/common/UIString.js(62,36): error TS2339: Property 'tokenizeFormatString' does not exist on type 'StringConstructor'.
@@ -3929,7 +3862,7 @@ node_modules/chrome-devtools-frontend/front_end/common/Worker.js(82,25): error T
 node_modules/chrome-devtools-frontend/front_end/components/DOMBreakpointsSidebarPane.js(39,45): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/components/DOMBreakpointsSidebarPane.js(40,46): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/components/DOMBreakpointsSidebarPane.js(41,38): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/components/DOMBreakpointsSidebarPane.js(43,96): error TS2694: Namespace 'DOMBreakpointsSidebarPane' has no exported member 'Item'.
+node_modules/chrome-devtools-frontend/front_end/components/DOMBreakpointsSidebarPane.js(43,96): error TS2694: Namespace 'Components.DOMBreakpointsSidebarPane' has no exported member 'Item'.
 node_modules/chrome-devtools-frontend/front_end/components/DOMBreakpointsSidebarPane.js(75,38): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/components/DOMBreakpointsSidebarPane.js(78,16): error TS2339: Property 'sprintf' does not exist on type 'StringConstructor'.
 node_modules/chrome-devtools-frontend/front_end/components/DOMBreakpointsSidebarPane.js(80,37): error TS2339: Property 'createChild' does not exist on type 'Element'.
@@ -3941,7 +3874,6 @@ node_modules/chrome-devtools-frontend/front_end/components/DOMBreakpointsSidebar
 node_modules/chrome-devtools-frontend/front_end/components/DOMBreakpointsSidebarPane.js(157,13): error TS2339: Property '_item' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/components/DOMBreakpointsSidebarPane.js(177,45): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/components/DOMBreakpointsSidebarPane.js(180,45): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/components/DOMBreakpointsSidebarPane.js(233,106): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/components/DOMBreakpointsSidebarPane.js(234,38): error TS2300: Duplicate identifier 'Item'.
 node_modules/chrome-devtools-frontend/front_end/components/DOMBreakpointsSidebarPane.js(234,38): error TS2339: Property 'Item' does not exist on type 'typeof DOMBreakpointsSidebarPane'.
 node_modules/chrome-devtools-frontend/front_end/components/DOMBreakpointsSidebarPane.js(237,61): error TS2555: Expected at least 2 arguments, but got 1.
@@ -3950,7 +3882,7 @@ node_modules/chrome-devtools-frontend/front_end/components/DOMBreakpointsSidebar
 node_modules/chrome-devtools-frontend/front_end/components/DOMBreakpointsSidebarPane.js(243,61): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/components/DOMBreakpointsSidebarPane.js(244,63): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/components/DOMBreakpointsSidebarPane.js(245,57): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/components/DOMBreakpointsSidebarPane.js(267,52): error TS2694: Namespace 'DOMBreakpoint' has no exported member 'Type'.
+node_modules/chrome-devtools-frontend/front_end/components/DOMBreakpointsSidebarPane.js(267,52): error TS2694: Namespace 'SDK.DOMDebuggerModel.DOMBreakpoint' has no exported member 'Type'.
 node_modules/chrome-devtools-frontend/front_end/components/DOMBreakpointsSidebarPane.js(276,72): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/components/DOMPresentationUtils.js(46,35): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/components/DOMPresentationUtils.js(51,35): error TS2339: Property 'createChild' does not exist on type 'Element'.
@@ -3983,18 +3915,18 @@ node_modules/chrome-devtools-frontend/front_end/components/DOMPresentationUtils.
 node_modules/chrome-devtools-frontend/front_end/components/DOMPresentationUtils.js(643,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 node_modules/chrome-devtools-frontend/front_end/components/DOMPresentationUtils.js(657,19): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/components/DockController.js(42,46): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/components/DockController.js(44,62): error TS2339: Property 'closeWindow' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/components/DockController.js(44,62): error TS2339: Property 'closeWindow' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/components/DockController.js(70,7): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/components/DockController.js(70,41): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/components/DockController.js(70,76): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/components/DockController.js(71,7): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/components/DockController.js(116,33): error TS2339: Property 'deepActiveElement' does not exist on type 'Document'.
-node_modules/chrome-devtools-frontend/front_end/components/DockController.js(122,27): error TS2339: Property 'setIsDocked' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/components/DockController.js(122,27): error TS2339: Property 'setIsDocked' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/components/DockController.js(193,5): error TS2322: Type 'ToolbarButton' is not assignable to type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
   Type 'ToolbarButton' is not assignable to type '{ [x: string]: any; item(): any & any; }'.
+    Property 'item' is missing in type 'ToolbarButton'.
 node_modules/chrome-devtools-frontend/front_end/components/DockController.js(193,5): error TS2322: Type 'ToolbarButton' is not assignable to type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
   Type 'ToolbarButton' is not assignable to type '{ [x: string]: any; item(): any & any; }'.
-    Property 'item' is missing in type 'ToolbarButton'.
 node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(62,24): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(125,94): error TS2339: Property 'remove' does not exist on type 'Map<Target, LiveLocationPool>'.
 node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(127,41): error TS2339: Property 'remove' does not exist on type 'Map<Target, Element[]>'.
@@ -4009,7 +3941,7 @@ node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(390,12):
 node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(392,12): error TS2339: Property 'href' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(418,10): error TS2339: Property 'removeChildren' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(432,31): error TS2339: Property 'createChild' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(440,33): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(440,43): error TS2339: Property 'splitStringByRegexes' does not exist on type 'typeof TextUtils'.
 node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(443,16): error TS2339: Property 'createTextChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(445,16): error TS2339: Property 'createTextChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(481,27): error TS2694: Namespace 'Components' has no exported member '_LinkInfo'.
@@ -4020,7 +3952,7 @@ node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(504,31):
 node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(505,28): error TS2339: Property '_linkHandlerSettingInstance' does not exist on type 'typeof Linkifier'.
 node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(506,60): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(508,33): error TS2339: Property '_linkHandlerSettingInstance' does not exist on type 'typeof Linkifier'.
-node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(513,36): error TS2694: Namespace 'Linkifier' has no exported member 'LinkHandler'.
+node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(513,36): error TS2694: Namespace 'Components.Linkifier' has no exported member 'LinkHandler'.
 node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(517,10): error TS2339: Property 'runtime' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(525,10): error TS2339: Property 'runtime' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(564,9): error TS2322: Type '({ [x: string]: any; section: string; title: string; handler: any; } | { section: string; title: ...' is not assignable to type '{ title: string; handler: () => any; }[]'.
@@ -4031,16 +3963,13 @@ node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(565,16):
 node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(572,16): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(580,16): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(587,16): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(611,46): error TS2339: Property 'openInNewTab' does not exist on type 'typeof InspectorFrontendHost'.
-node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(614,105): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(611,46): error TS2339: Property 'openInNewTab' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(614,105): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(616,5): error TS2322: Type '({ [x: string]: any; section: string; title: string; handler: any; } | { section: string; title: ...' is not assignable to type '{ title: string; handler: () => any; }[]'.
 node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(631,2): error TS1131: Property or signature expected.
-node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(642,12): error TS2339: Property '_LinkInfo' does not exist on type 'typeof Components'.
 node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(646,2): error TS1131: Property or signature expected.
-node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(654,12): error TS2339: Property 'LinkifyURLOptions' does not exist on type 'typeof Components'.
-node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(665,2): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(666,22): error TS2551: Property 'LinkHandler' does not exist on type 'typeof Linkifier'. Did you mean '_linkHandlers'?
-node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(668,47): error TS2694: Namespace 'Linkifier' has no exported member 'LinkHandler'.
+node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(668,47): error TS2694: Namespace 'Components.Linkifier' has no exported member 'LinkHandler'.
 node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(675,1): error TS8022: JSDoc '@extends' is not attached to a class.
 node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(680,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(703,31): error TS2339: Property 'parentNodeOrShadowHost' does not exist on type 'Node'.
@@ -4052,9 +3981,9 @@ node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(729,14):
 node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(732,19): error TS2339: Property 'disabled' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(739,30): error TS2339: Property 'value' does not exist on type 'EventTarget'.
 node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(748,46): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(769,67): error TS2339: Property 'openInNewTab' does not exist on type 'typeof InspectorFrontendHost'.
-node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(779,64): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHost'.
-node_modules/chrome-devtools-frontend/front_end/components/Reload.js(7,27): error TS2339: Property 'setIsDocked' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(769,67): error TS2339: Property 'openInNewTab' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/components/Linkifier.js(779,64): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/components/Reload.js(7,27): error TS2339: Property 'setIsDocked' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleContextSelector.js(8,9): error TS2339: Property 'ConsoleContextSelector' does not exist on type '{ new (): Console; prototype: Console; }'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleContextSelector.js(45,5): error TS2322: Type 'ToolbarItem' is not assignable to type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
   Type 'ToolbarItem' is not assignable to type '{ [x: string]: any; item(): any & any; }'.
@@ -4072,7 +4001,7 @@ node_modules/chrome-devtools-frontend/front_end/console/ConsoleContextSelector.j
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleContextSelector.js(323,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleContextSelector.js(336,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleFilter.js(5,9): error TS2339: Property 'ConsoleFilter' does not exist on type '{ new (): Console; prototype: Console; }'.
-node_modules/chrome-devtools-frontend/front_end/console/ConsoleFilter.js(8,45): error TS2694: Namespace 'FilterParser' has no exported member 'ParsedFilter'.
+node_modules/chrome-devtools-frontend/front_end/console/ConsoleFilter.js(8,45): error TS2694: Namespace 'TextUtils.FilterParser' has no exported member 'ParsedFilter'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleFilter.js(16,45): error TS2339: Property 'ConsoleFilter' does not exist on type '{ new (): Console; prototype: Console; }'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleFilter.js(33,26): error TS2339: Property 'ConsoleFilter' does not exist on type '{ new (): Console; prototype: Console; }'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleFilter.js(54,24): error TS2339: Property 'ConsoleFilter' does not exist on type '{ new (): Console; prototype: Console; }'.
@@ -4080,9 +4009,9 @@ node_modules/chrome-devtools-frontend/front_end/console/ConsoleFilter.js(72,47):
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleFilter.js(83,24): error TS2339: Property 'ConsoleFilter' does not exist on type '{ new (): Console; prototype: Console; }'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleFilter.js(87,24): error TS2339: Property 'ConsoleFilter' does not exist on type '{ new (): Console; prototype: Console; }'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleFilter.js(90,25): error TS2352: Type 'string' cannot be converted to type '{ [x: string]: any; XML: string; JS: string; Network: string; ConsoleAPI: string; Storage: string...'.
-node_modules/chrome-devtools-frontend/front_end/console/ConsoleFilter.js(90,61): error TS2694: Namespace 'ConsoleMessage' has no exported member 'MessageSource'.
+node_modules/chrome-devtools-frontend/front_end/console/ConsoleFilter.js(90,61): error TS2694: Namespace 'ConsoleModel.ConsoleMessage' has no exported member 'MessageSource'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleFilter.js(95,24): error TS2339: Property 'ConsoleFilter' does not exist on type '{ new (): Console; prototype: Console; }'.
-node_modules/chrome-devtools-frontend/front_end/console/ConsoleFilter.js(105,40): error TS2694: Namespace 'FilterParser' has no exported member 'ParsedFilter'.
+node_modules/chrome-devtools-frontend/front_end/console/ConsoleFilter.js(105,40): error TS2694: Namespace 'TextUtils.FilterParser' has no exported member 'ParsedFilter'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleFilter.js(127,9): error TS2339: Property 'ConsoleFilter' does not exist on type '{ new (): Console; prototype: Console; }'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsolePanel.js(32,9): error TS2339: Property 'ConsolePanel' does not exist on type '{ new (): Console; prototype: Console; }'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsolePanel.js(35,26): error TS2339: Property 'ConsoleView' does not exist on type '{ new (): Console; prototype: Console; }'.
@@ -4102,6 +4031,7 @@ node_modules/chrome-devtools-frontend/front_end/console/ConsolePrompt.js(7,9): e
 node_modules/chrome-devtools-frontend/front_end/console/ConsolePrompt.js(11,33): error TS2339: Property 'ConsoleHistoryManager' does not exist on type '{ new (): Console; prototype: Console; }'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsolePrompt.js(16,18): error TS2339: Property 'tabIndex' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsolePrompt.js(18,10): error TS2339: Property 'runtime' does not exist on type 'Window'.
+node_modules/chrome-devtools-frontend/front_end/console/ConsolePrompt.js(41,20): error TS2339: Property 'tabIndex' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsolePrompt.js(48,43): error TS2339: Property 'ConsolePrompt' does not exist on type '{ new (): Console; prototype: Console; }'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsolePrompt.js(83,43): error TS2339: Property 'ConsolePrompt' does not exist on type '{ new (): Console; prototype: Console; }'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsolePrompt.js(137,25): error TS2339: Property 'consume' does not exist on type 'KeyboardEvent'.
@@ -4109,9 +4039,9 @@ node_modules/chrome-devtools-frontend/front_end/console/ConsolePrompt.js(143,19)
 node_modules/chrome-devtools-frontend/front_end/console/ConsolePrompt.js(159,11): error TS2339: Property 'consume' does not exist on type 'KeyboardEvent'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsolePrompt.js(206,19): error TS2339: Property 'ConsolePanel' does not exist on type '{ new (): Console; prototype: Console; }'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsolePrompt.js(207,38): error TS2345: Argument of type 'number' is not assignable to parameter of type '{ [x: string]: any; WindowDocked: number; WindowUndocked: number; ScriptsBreakpointSet: number; T...'.
-node_modules/chrome-devtools-frontend/front_end/console/ConsolePrompt.js(217,30): error TS2694: Namespace 'SuggestBox' has no exported member 'Suggestions'.
+node_modules/chrome-devtools-frontend/front_end/console/ConsolePrompt.js(217,30): error TS2694: Namespace 'UI.SuggestBox' has no exported member 'Suggestions'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsolePrompt.js(246,20): error TS2339: Property 'focus' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/console/ConsolePrompt.js(272,39): error TS2694: Namespace 'SuggestBox' has no exported member 'Suggestions'.
+node_modules/chrome-devtools-frontend/front_end/console/ConsolePrompt.js(272,39): error TS2694: Namespace 'UI.SuggestBox' has no exported member 'Suggestions'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsolePrompt.js(300,9): error TS2339: Property 'ConsoleHistoryManager' does not exist on type '{ new (): Console; prototype: Console; }'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsolePrompt.js(387,9): error TS2339: Property 'ConsolePrompt' does not exist on type '{ new (): Console; prototype: Console; }'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleSidebar.js(5,9): error TS2339: Property 'ConsoleSidebar' does not exist on type '{ new (): Console; prototype: Console; }'.
@@ -4128,7 +4058,7 @@ node_modules/chrome-devtools-frontend/front_end/console/ConsoleSidebar.js(44,17)
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleSidebar.js(44,69): error TS2339: Property 'ConsoleFilter' does not exist on type '{ new (): Console; prototype: Console; }'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleSidebar.js(47,17): error TS2339: Property 'ConsoleSidebar' does not exist on type '{ new (): Console; prototype: Console; }'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleSidebar.js(47,72): error TS2339: Property 'ConsoleFilter' does not exist on type '{ new (): Console; prototype: Console; }'.
-node_modules/chrome-devtools-frontend/front_end/console/ConsoleSidebar.js(57,45): error TS2694: Namespace 'FilterParser' has no exported member 'ParsedFilter'.
+node_modules/chrome-devtools-frontend/front_end/console/ConsoleSidebar.js(57,45): error TS2694: Namespace 'TextUtils.FilterParser' has no exported member 'ParsedFilter'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleSidebar.js(64,30): error TS2339: Property 'ConsoleFilter' does not exist on type '{ new (): Console; prototype: Console; }'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleSidebar.js(65,35): error TS2339: Property 'ConsoleSidebar' does not exist on type '{ new (): Console; prototype: Console; }'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleSidebar.js(94,38): error TS2339: Property '_filter' does not exist on type 'TreeElement'.
@@ -4167,13 +4097,16 @@ node_modules/chrome-devtools-frontend/front_end/console/ConsoleSidebar.js(241,52
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleSidebar.js(242,12): error TS2339: Property 'ConsoleSidebar' does not exist on type '{ new (): Console; prototype: Console; }'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleSidebar.js(242,55): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleView.js(34,9): error TS2339: Property 'ConsoleView' does not exist on type '{ new (): Console; prototype: Console; }'.
+node_modules/chrome-devtools-frontend/front_end/console/ConsoleView.js(40,50): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; searchCanceled(): void; performSearch(searchConfig: SearchConfig, shouldJump:...'.
+  Type 'ConsoleView' is not assignable to type '{ [x: string]: any; searchCanceled(): void; performSearch(searchConfig: SearchConfig, shouldJump:...'.
+    Property '_searchableView' does not exist on type '{ [x: string]: any; searchCanceled(): void; performSearch(searchConfig: SearchConfig, shouldJump:...'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleView.js(42,41): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleView.js(45,33): error TS2339: Property 'ConsoleSidebar' does not exist on type '{ new (): Console; prototype: Console; }'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleView.js(46,44): error TS2339: Property 'ConsoleSidebar' does not exist on type '{ new (): Console; prototype: Console; }'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleView.js(48,32): error TS2339: Property 'ConsoleViewFilter' does not exist on type '{ new (): Console; prototype: Console; }'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleView.js(63,33): error TS2345: Argument of type 'ToolbarButton' is not assignable to parameter of type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
   Type 'ToolbarButton' is not assignable to type '{ [x: string]: any; item(): any & any; }'.
-node_modules/chrome-devtools-frontend/front_end/console/ConsoleView.js(88,44): error TS2694: Namespace 'ConsoleView' has no exported member 'RegexMatchRange'.
+node_modules/chrome-devtools-frontend/front_end/console/ConsoleView.js(88,44): error TS2694: Namespace 'Console.ConsoleView' has no exported member 'RegexMatchRange'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleView.js(92,48): error TS2339: Property 'ConsoleContextSelector' does not exist on type '{ new (): Console; prototype: Console; }'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleView.js(98,67): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleView.js(102,87): error TS2555: Expected at least 2 arguments, but got 1.
@@ -4274,8 +4207,6 @@ node_modules/chrome-devtools-frontend/front_end/console/ConsoleView.js(955,22):
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleView.js(959,123): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleView.js(963,61): error TS2339: Property 'ConsoleView' does not exist on type '{ new (): Console; prototype: Console; }'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleView.js(1009,44): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/console/ConsoleView.js(1113,78): error TS2339: Property 'highlightedCurrentSearchResultClassName' does not exist on type 'typeof UI'.
-node_modules/chrome-devtools-frontend/front_end/console/ConsoleView.js(1122,36): error TS2339: Property 'highlightedCurrentSearchResultClassName' does not exist on type 'typeof UI'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleView.js(1124,19): error TS2339: Property 'scrollIntoViewIfNeeded' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleView.js(1183,9): error TS2339: Property 'ConsoleView' does not exist on type '{ new (): Console; prototype: Console; }'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleView.js(1185,9): error TS2339: Property 'ConsoleViewFilter' does not exist on type '{ new (): Console; prototype: Console; }'.
@@ -4324,10 +4255,9 @@ node_modules/chrome-devtools-frontend/front_end/console/ConsoleView.js(1477,9):
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleView.js(1486,38): error TS2339: Property 'collapsed' does not exist on type 'ConsoleViewMessage'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleView.js(1493,24): error TS2339: Property 'ConsoleGroup' does not exist on type '{ new (): Console; prototype: Console; }'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleView.js(1521,9): error TS2339: Property 'ConsoleView' does not exist on type '{ new (): Console; prototype: Console; }'.
-node_modules/chrome-devtools-frontend/front_end/console/ConsoleView.js(1531,31): error TS2339: Property 'bringToFront' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/console/ConsoleView.js(1531,31): error TS2339: Property 'bringToFront' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleView.js(1535,17): error TS2339: Property 'ConsoleView' does not exist on type '{ new (): Console; prototype: Console; }'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleView.js(1538,17): error TS2339: Property 'ConsoleView' does not exist on type '{ new (): Console; prototype: Console; }'.
-node_modules/chrome-devtools-frontend/front_end/console/ConsoleView.js(1547,2): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleView.js(1548,9): error TS2339: Property 'ConsoleView' does not exist on type '{ new (): Console; prototype: Console; }'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleView.js(1551,9): error TS2339: Property 'ConsoleView' does not exist on type '{ new (): Console; prototype: Console; }'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleViewMessage.js(34,9): error TS2339: Property 'ConsoleViewMessage' does not exist on type '{ new (): Console; prototype: Console; }'.
@@ -4433,13 +4363,13 @@ node_modules/chrome-devtools-frontend/front_end/console/ConsoleViewMessage.js(13
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleViewMessage.js(1381,63): error TS2339: Property 'withThousandsSeparator' does not exist on type 'NumberConstructor'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleViewMessage.js(1388,33): error TS2339: Property 'createChild' does not exist on type 'DocumentFragment'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleViewMessage.js(1389,44): error TS2554: Expected 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/console/ConsoleViewMessage.js(1391,31): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/console/ConsoleViewMessage.js(1391,31): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleViewMessage.js(1402,20): error TS2339: Property 'ConsoleViewMessage' does not exist on type '{ new (): Console; prototype: Console; }'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleViewMessage.js(1412,18): error TS2339: Property 'ConsoleViewMessage' does not exist on type '{ new (): Console; prototype: Console; }'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleViewMessage.js(1430,15): error TS2339: Property 'ConsoleViewMessage' does not exist on type '{ new (): Console; prototype: Console; }'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleViewMessage.js(1431,15): error TS2339: Property 'ConsoleViewMessage' does not exist on type '{ new (): Console; prototype: Console; }'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleViewMessage.js(1433,33): error TS2339: Property 'ConsoleViewMessage' does not exist on type '{ new (): Console; prototype: Console; }'.
-node_modules/chrome-devtools-frontend/front_end/console/ConsoleViewMessage.js(1435,29): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/console/ConsoleViewMessage.js(1435,39): error TS2339: Property 'splitStringByRegexes' does not exist on type 'typeof TextUtils'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleViewMessage.js(1435,76): error TS2339: Property 'ConsoleViewMessage' does not exist on type '{ new (): Console; prototype: Console; }'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleViewMessage.js(1437,55): error TS2339: Property 'ConsoleViewMessage' does not exist on type '{ new (): Console; prototype: Console; }'.
 node_modules/chrome-devtools-frontend/front_end/console/ConsoleViewMessage.js(1453,26): error TS2339: Property 'ConsoleViewMessage' does not exist on type '{ new (): Console; prototype: Console; }'.
@@ -4573,19 +4503,19 @@ node_modules/chrome-devtools-frontend/front_end/console_model/ConsoleModel.js(17
 node_modules/chrome-devtools-frontend/front_end/console_model/ConsoleModel.js(193,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/console_model/ConsoleModel.js(196,70): error TS2694: Namespace 'Protocol' has no exported member 'Log'.
 node_modules/chrome-devtools-frontend/front_end/console_model/ConsoleModel.js(207,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/console_model/ConsoleModel.js(210,63): error TS2694: Namespace 'RuntimeModel' has no exported member 'ExceptionWithTimestamp'.
+node_modules/chrome-devtools-frontend/front_end/console_model/ConsoleModel.js(210,63): error TS2694: Namespace 'SDK.RuntimeModel' has no exported member 'ExceptionWithTimestamp'.
 node_modules/chrome-devtools-frontend/front_end/console_model/ConsoleModel.js(219,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/console_model/ConsoleModel.js(228,5): error TS2322: Type 'string' is not assignable to type '{ [x: string]: any; Verbose: string; Info: string; Warning: string; Error: string; }'.
 node_modules/chrome-devtools-frontend/front_end/console_model/ConsoleModel.js(234,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/console_model/ConsoleModel.js(237,45): error TS2694: Namespace 'RuntimeModel' has no exported member 'ConsoleAPICall'.
+node_modules/chrome-devtools-frontend/front_end/console_model/ConsoleModel.js(237,45): error TS2694: Namespace 'SDK.RuntimeModel' has no exported member 'ConsoleAPICall'.
 node_modules/chrome-devtools-frontend/front_end/console_model/ConsoleModel.js(269,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/console_model/ConsoleModel.js(286,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/console_model/ConsoleModel.js(295,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/console_model/ConsoleModel.js(298,49): error TS2694: Namespace 'CPUProfilerModel' has no exported member 'EventData'.
+node_modules/chrome-devtools-frontend/front_end/console_model/ConsoleModel.js(298,49): error TS2694: Namespace 'SDK.CPUProfilerModel' has no exported member 'EventData'.
 node_modules/chrome-devtools-frontend/front_end/console_model/ConsoleModel.js(306,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/console_model/ConsoleModel.js(309,49): error TS2694: Namespace 'CPUProfilerModel' has no exported member 'EventData'.
+node_modules/chrome-devtools-frontend/front_end/console_model/ConsoleModel.js(309,49): error TS2694: Namespace 'SDK.CPUProfilerModel' has no exported member 'EventData'.
 node_modules/chrome-devtools-frontend/front_end/console_model/ConsoleModel.js(337,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/console_model/ConsoleModel.js(340,50): error TS2694: Namespace 'NetworkManager' has no exported member 'Message'.
+node_modules/chrome-devtools-frontend/front_end/console_model/ConsoleModel.js(340,50): error TS2694: Namespace 'SDK.NetworkManager' has no exported member 'Message'.
 node_modules/chrome-devtools-frontend/front_end/console_model/ConsoleModel.js(355,12): error TS2678: Type 'string' is not comparable to type '{ [x: string]: any; Verbose: string; Info: string; Warning: string; Error: string; }'.
 node_modules/chrome-devtools-frontend/front_end/console_model/ConsoleModel.js(358,12): error TS2678: Type 'string' is not comparable to type '{ [x: string]: any; Verbose: string; Info: string; Warning: string; Error: string; }'.
 node_modules/chrome-devtools-frontend/front_end/console_model/ConsoleModel.js(424,24): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
@@ -4593,7 +4523,7 @@ node_modules/chrome-devtools-frontend/front_end/console_model/ConsoleModel.js(42
 node_modules/chrome-devtools-frontend/front_end/console_model/ConsoleModel.js(426,24): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
 node_modules/chrome-devtools-frontend/front_end/console_model/ConsoleModel.js(428,24): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
 node_modules/chrome-devtools-frontend/front_end/console_model/ConsoleModel.js(438,22): error TS2352: Type 'string' cannot be converted to type '{ [x: string]: any; Verbose: string; Info: string; Warning: string; Error: string; }'.
-node_modules/chrome-devtools-frontend/front_end/console_model/ConsoleModel.js(438,58): error TS2694: Namespace 'ConsoleMessage' has no exported member 'MessageLevel'.
+node_modules/chrome-devtools-frontend/front_end/console_model/ConsoleModel.js(438,58): error TS2694: Namespace 'ConsoleModel.ConsoleMessage' has no exported member 'MessageLevel'.
 node_modules/chrome-devtools-frontend/front_end/console_model/ConsoleModel.js(448,26): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
 node_modules/chrome-devtools-frontend/front_end/console_model/ConsoleModel.js(481,24): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
 node_modules/chrome-devtools-frontend/front_end/console_model/ConsoleModel.js(514,24): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
@@ -4603,18 +4533,15 @@ node_modules/chrome-devtools-frontend/front_end/console_model/ConsoleModel.js(56
 node_modules/chrome-devtools-frontend/front_end/console_model/ConsoleModel.js(578,54): error TS2339: Property '_pageLoadSequenceNumber' does not exist on type 'ConsoleMessage'.
 node_modules/chrome-devtools-frontend/front_end/console_model/ConsoleModel.js(615,24): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
 node_modules/chrome-devtools-frontend/front_end/console_model/ConsoleModel.js(616,24): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
-node_modules/chrome-devtools-frontend/front_end/console_model/ConsoleModel.js(695,46): error TS2694: Namespace 'ConsoleMessage' has no exported member 'MessageSource'.
+node_modules/chrome-devtools-frontend/front_end/console_model/ConsoleModel.js(695,46): error TS2694: Namespace 'ConsoleModel.ConsoleMessage' has no exported member 'MessageSource'.
 node_modules/chrome-devtools-frontend/front_end/console_model/ConsoleModel.js(696,1): error TS2322: Type 'Map<string, string>' is not assignable to type 'Map<{ [x: string]: any; XML: string; JS: string; Network: string; ConsoleAPI: string; Storage: st...'.
   Type 'string' is not assignable to type '{ [x: string]: any; XML: string; JS: string; Network: string; ConsoleAPI: string; Storage: string...'.
-node_modules/chrome-devtools-frontend/front_end/console_test_runner/ConsoleTestRunner.js(10,73): error TS1003: Identifier expected.
-node_modules/chrome-devtools-frontend/front_end/console_test_runner/ConsoleTestRunner.js(11,19): error TS2339: Property 'Formatter' does not exist on type 'typeof ConsoleTestRunner'.
 node_modules/chrome-devtools-frontend/front_end/console_test_runner/ConsoleTestRunner.js(16,31): error TS2694: Namespace 'ConsoleTestRunner' has no exported member 'Formatter'.
 node_modules/chrome-devtools-frontend/front_end/console_test_runner/ConsoleTestRunner.js(26,31): error TS2694: Namespace 'ConsoleTestRunner' has no exported member 'Formatter'.
 node_modules/chrome-devtools-frontend/front_end/console_test_runner/ConsoleTestRunner.js(33,29): error TS2339: Property 'ConsoleView' does not exist on type '{ new (): Console; prototype: Console; }'.
 node_modules/chrome-devtools-frontend/front_end/console_test_runner/ConsoleTestRunner.js(73,36): error TS2339: Property 'deepTextContent' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/console_test_runner/ConsoleTestRunner.js(96,13): error TS2339: Property 'ConsoleView' does not exist on type '{ new (): Console; prototype: Console; }'.
 node_modules/chrome-devtools-frontend/front_end/console_test_runner/ConsoleTestRunner.js(143,26): error TS2339: Property 'ConsoleView' does not exist on type '{ new (): Console; prototype: Console; }'.
-node_modules/chrome-devtools-frontend/front_end/console_test_runner/ConsoleTestRunner.js(151,38): error TS2339: Property 'runtimeModel' does not exist on type 'typeof TestRunner'.
 node_modules/chrome-devtools-frontend/front_end/console_test_runner/ConsoleTestRunner.js(170,29): error TS2339: Property 'ConsoleView' does not exist on type '{ new (): Console; prototype: Console; }'.
 node_modules/chrome-devtools-frontend/front_end/console_test_runner/ConsoleTestRunner.js(191,33): error TS2339: Property 'ConsoleView' does not exist on type '{ new (): Console; prototype: Console; }'.
 node_modules/chrome-devtools-frontend/front_end/console_test_runner/ConsoleTestRunner.js(216,29): error TS2339: Property 'ConsoleView' does not exist on type '{ new (): Console; prototype: Console; }'.
@@ -4639,7 +4566,7 @@ node_modules/chrome-devtools-frontend/front_end/console_test_runner/ConsoleTestR
 node_modules/chrome-devtools-frontend/front_end/console_test_runner/ConsoleTestRunner.js(563,30): error TS2339: Property 'ConsoleView' does not exist on type '{ new (): Console; prototype: Console; }'.
 node_modules/chrome-devtools-frontend/front_end/cookie_table/CookiesTable.js(39,36): error TS1138: Parameter declaration expected.
 node_modules/chrome-devtools-frontend/front_end/cookie_table/CookiesTable.js(39,36): error TS8024: JSDoc '@param' tag has name 'function', but there is no parameter with that name.
-node_modules/chrome-devtools-frontend/front_end/cookie_table/CookiesTable.js(50,56): error TS2694: Namespace 'DataGrid' has no exported member 'ColumnDescriptor'.
+node_modules/chrome-devtools-frontend/front_end/cookie_table/CookiesTable.js(50,56): error TS2694: Namespace 'DataGrid.DataGrid' has no exported member 'ColumnDescriptor'.
 node_modules/chrome-devtools-frontend/front_end/cookie_table/CookiesTable.js(53,16): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/cookie_table/CookiesTable.js(61,28): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/cookie_table/CookiesTable.js(62,29): error TS2555: Expected at least 2 arguments, but got 1.
@@ -4668,7 +4595,6 @@ node_modules/chrome-devtools-frontend/front_end/cookie_table/CookiesTable.js(461
 node_modules/chrome-devtools-frontend/front_end/cookie_table/CookiesTable.js(470,51): error TS2339: Property 'asParsedURL' does not exist on type 'string'.
 node_modules/chrome-devtools-frontend/front_end/cookie_table/CookiesTable.js(489,49): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/coverage/CoverageDecorationManager.js(7,2): error TS1131: Property or signature expected.
-node_modules/chrome-devtools-frontend/front_end/coverage/CoverageDecorationManager.js(13,10): error TS2339: Property 'RawLocation' does not exist on type 'typeof Coverage'.
 node_modules/chrome-devtools-frontend/front_end/coverage/CoverageDecorationManager.js(50,68): error TS2339: Property 'get' does not exist on type 'Multimap'.
 node_modules/chrome-devtools-frontend/front_end/coverage/CoverageDecorationManager.js(115,45): error TS2339: Property 'set' does not exist on type 'Multimap'.
 node_modules/chrome-devtools-frontend/front_end/coverage/CoverageDecorationManager.js(135,32): error TS2694: Namespace 'Coverage' has no exported member 'RawLocation'.
@@ -4681,14 +4607,10 @@ node_modules/chrome-devtools-frontend/front_end/coverage/CoverageDecorationManag
 node_modules/chrome-devtools-frontend/front_end/coverage/CoverageDecorationManager.js(248,24): error TS2694: Namespace 'Coverage' has no exported member 'RawLocation'.
 node_modules/chrome-devtools-frontend/front_end/coverage/CoverageDecorationManager.js(255,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/coverage/CoverageDecorationManager.js(258,34): error TS1110: Type expected.
-node_modules/chrome-devtools-frontend/front_end/coverage/CoverageDecorationManager.js(268,23): error TS2339: Property 'LineDecorator' does not exist on type 'typeof CoverageView'.
 node_modules/chrome-devtools-frontend/front_end/coverage/CoverageDecorationManager.js(277,18): error TS2339: Property 'uninstallGutter' does not exist on type 'CodeMirrorTextEditor'.
-node_modules/chrome-devtools-frontend/front_end/coverage/CoverageDecorationManager.js(277,56): error TS2339: Property 'LineDecorator' does not exist on type 'typeof CoverageView'.
-node_modules/chrome-devtools-frontend/front_end/coverage/CoverageDecorationManager.js(292,44): error TS2339: Property 'LineDecorator' does not exist on type 'typeof CoverageView'.
 node_modules/chrome-devtools-frontend/front_end/coverage/CoverageDecorationManager.js(293,16): error TS2339: Property 'uninstallGutter' does not exist on type 'CodeMirrorTextEditor'.
 node_modules/chrome-devtools-frontend/front_end/coverage/CoverageDecorationManager.js(294,16): error TS2339: Property 'installGutter' does not exist on type 'CodeMirrorTextEditor'.
 node_modules/chrome-devtools-frontend/front_end/coverage/CoverageDecorationManager.js(300,18): error TS2339: Property 'setGutterDecoration' does not exist on type 'CodeMirrorTextEditor'.
-node_modules/chrome-devtools-frontend/front_end/coverage/CoverageDecorationManager.js(305,23): error TS2339: Property 'LineDecorator' does not exist on type 'typeof CoverageView'.
 node_modules/chrome-devtools-frontend/front_end/coverage/CoverageListView.js(18,26): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/coverage/CoverageListView.js(19,27): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/coverage/CoverageListView.js(21,16): error TS2555: Expected at least 2 arguments, but got 1.
@@ -4696,15 +4618,11 @@ node_modules/chrome-devtools-frontend/front_end/coverage/CoverageListView.js(29,
 node_modules/chrome-devtools-frontend/front_end/coverage/CoverageListView.js(39,36): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Nearest: string; First: string; Last: string; }'.
 node_modules/chrome-devtools-frontend/front_end/coverage/CoverageListView.js(112,11): error TS2339: Property 'consume' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/coverage/CoverageListView.js(201,24): error TS2694: Namespace 'Coverage' has no exported member 'CoverageType'.
-node_modules/chrome-devtools-frontend/front_end/coverage/CoverageListView.js(205,25): error TS2339: Property 'CoverageType' does not exist on type 'typeof Coverage'.
 node_modules/chrome-devtools-frontend/front_end/coverage/CoverageListView.js(206,18): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/coverage/CoverageListView.js(207,25): error TS2339: Property 'CoverageType' does not exist on type 'typeof Coverage'.
 node_modules/chrome-devtools-frontend/front_end/coverage/CoverageListView.js(208,18): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/coverage/CoverageListView.js(209,30): error TS2339: Property 'CoverageType' does not exist on type 'typeof Coverage'.
 node_modules/chrome-devtools-frontend/front_end/coverage/CoverageListView.js(210,18): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/coverage/CoverageListView.js(264,14): error TS2339: Property 'title' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/coverage/CoverageListView.js(265,26): error TS2339: Property 'createChild' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/coverage/CoverageListView.js(276,50): error TS2339: Property 'CoverageType' does not exist on type 'typeof Coverage'.
 node_modules/chrome-devtools-frontend/front_end/coverage/CoverageListView.js(277,16): error TS2339: Property 'title' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/coverage/CoverageListView.js(277,24): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/coverage/CoverageListView.js(280,35): error TS2339: Property 'withThousandsSeparator' does not exist on type 'NumberConstructor'.
@@ -4712,23 +4630,18 @@ node_modules/chrome-devtools-frontend/front_end/coverage/CoverageListView.js(284
 node_modules/chrome-devtools-frontend/front_end/coverage/CoverageListView.js(285,39): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/coverage/CoverageListView.js(286,45): error TS2339: Property 'withThousandsSeparator' does not exist on type 'NumberConstructor'.
 node_modules/chrome-devtools-frontend/front_end/coverage/CoverageListView.js(290,33): error TS2339: Property 'createChild' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/coverage/CoverageModel.js(5,72): error TS1003: Identifier expected.
-node_modules/chrome-devtools-frontend/front_end/coverage/CoverageModel.js(6,10): error TS2339: Property 'RangeUseCount' does not exist on type 'typeof Coverage'.
-node_modules/chrome-devtools-frontend/front_end/coverage/CoverageModel.js(8,57): error TS1003: Identifier expected.
-node_modules/chrome-devtools-frontend/front_end/coverage/CoverageModel.js(9,10): error TS2339: Property 'CoverageSegment' does not exist on type 'typeof Coverage'.
-node_modules/chrome-devtools-frontend/front_end/coverage/CoverageModel.js(14,10): error TS2339: Property 'CoverageType' does not exist on type 'typeof Coverage'.
 node_modules/chrome-devtools-frontend/front_end/coverage/CoverageModel.js(34,42): error TS2694: Namespace 'Protocol' has no exported member 'Profiler'.
-node_modules/chrome-devtools-frontend/front_end/coverage/CoverageModel.js(100,37): error TS2339: Property 'CoverageType' does not exist on type 'typeof Coverage'.
 node_modules/chrome-devtools-frontend/front_end/coverage/CoverageModel.js(103,46): error TS2345: Argument of type 'CSSStyleSheetHeader' is not assignable to parameter of type '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
   Property '_cssModel' does not exist on type '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
 node_modules/chrome-devtools-frontend/front_end/coverage/CoverageModel.js(131,31): error TS2694: Namespace 'Protocol' has no exported member 'Profiler'.
-node_modules/chrome-devtools-frontend/front_end/coverage/CoverageModel.js(141,27): error TS2339: Property 'CoverageType' does not exist on type 'typeof Coverage'.
-node_modules/chrome-devtools-frontend/front_end/coverage/CoverageModel.js(148,28): error TS2339: Property 'CoverageType' does not exist on type 'typeof Coverage'.
+node_modules/chrome-devtools-frontend/front_end/coverage/CoverageModel.js(152,37): error TS2345: Argument of type 'Script' is not assignable to parameter of type '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
+  Property 'debuggerModel' does not exist on type '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
 node_modules/chrome-devtools-frontend/front_end/coverage/CoverageModel.js(170,31): error TS2694: Namespace 'Protocol' has no exported member 'CSS'.
 node_modules/chrome-devtools-frontend/front_end/coverage/CoverageModel.js(175,64): error TS2694: Namespace 'Coverage' has no exported member 'RangeUseCount'.
 node_modules/chrome-devtools-frontend/front_end/coverage/CoverageModel.js(190,48): error TS2694: Namespace 'Coverage' has no exported member 'RangeUseCount'.
 node_modules/chrome-devtools-frontend/front_end/coverage/CoverageModel.js(191,11): error TS2403: Subsequent variable declarations must have the same type.  Variable 'entry' must be of type '[CSSStyleSheetHeader, any[]]', but here has type 'CoverageInfo'.
-node_modules/chrome-devtools-frontend/front_end/coverage/CoverageModel.js(193,28): error TS2339: Property 'CoverageType' does not exist on type 'typeof Coverage'.
+node_modules/chrome-devtools-frontend/front_end/coverage/CoverageModel.js(192,11): error TS2345: Argument of type 'CSSStyleSheetHeader' is not assignable to parameter of type '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
+  Property '_cssModel' does not exist on type '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
 node_modules/chrome-devtools-frontend/front_end/coverage/CoverageModel.js(197,5): error TS2322: Type '[CSSStyleSheetHeader, any[]][]' is not assignable to type 'CoverageInfo[]'.
   Type '[CSSStyleSheetHeader, any[]]' is not assignable to type 'CoverageInfo'.
     Property '_contentProvider' is missing in type '[CSSStyleSheetHeader, any[]]'.
@@ -4744,8 +4657,6 @@ node_modules/chrome-devtools-frontend/front_end/coverage/CoverageModel.js(267,37
 node_modules/chrome-devtools-frontend/front_end/coverage/CoverageModel.js(288,26): error TS2694: Namespace 'Coverage' has no exported member 'CoverageType'.
 node_modules/chrome-devtools-frontend/front_end/coverage/CoverageModel.js(301,25): error TS2694: Namespace 'Coverage' has no exported member 'CoverageType'.
 node_modules/chrome-devtools-frontend/front_end/coverage/CoverageModel.js(340,24): error TS2694: Namespace 'Coverage' has no exported member 'CoverageType'.
-node_modules/chrome-devtools-frontend/front_end/coverage/CoverageModel.js(347,26): error TS2339: Property 'CoverageType' does not exist on type 'typeof Coverage'.
-node_modules/chrome-devtools-frontend/front_end/coverage/CoverageModel.js(356,26): error TS2339: Property 'CoverageType' does not exist on type 'typeof Coverage'.
 node_modules/chrome-devtools-frontend/front_end/coverage/CoverageModel.js(371,24): error TS2694: Namespace 'Coverage' has no exported member 'CoverageType'.
 node_modules/chrome-devtools-frontend/front_end/coverage/CoverageModel.js(398,25): error TS2694: Namespace 'Coverage' has no exported member 'CoverageType'.
 node_modules/chrome-devtools-frontend/front_end/coverage/CoverageModel.js(405,31): error TS2694: Namespace 'Coverage' has no exported member 'CoverageSegment'.
@@ -4777,28 +4688,15 @@ node_modules/chrome-devtools-frontend/front_end/coverage/CoverageView.js(231,59)
 node_modules/chrome-devtools-frontend/front_end/coverage_test_runner/CoverageTestRunner.js(12,27): error TS2339: Property 'runtime' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/coverage_test_runner/CoverageTestRunner.js(20,27): error TS2339: Property 'runtime' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/coverage_test_runner/CoverageTestRunner.js(28,27): error TS2339: Property 'runtime' does not exist on type 'Window'.
-node_modules/chrome-devtools-frontend/front_end/coverage_test_runner/CoverageTestRunner.js(37,76): error TS2339: Property 'LineDecorator' does not exist on type 'typeof CoverageView'.
 node_modules/chrome-devtools-frontend/front_end/coverage_test_runner/CoverageTestRunner.js(52,31): error TS2339: Property 'runtime' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/coverage_test_runner/CoverageTestRunner.js(87,31): error TS2339: Property 'runtime' does not exist on type 'Window'.
-node_modules/chrome-devtools-frontend/front_end/cpu_profiler_test_runner/ProfilerTestRunner.js(12,28): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/cpu_profiler_test_runner/ProfilerTestRunner.js(44,25): error TS2551: Property '_showProfileWhenAdded' does not exist on type 'typeof CPUProfilerTestRunner'. Did you mean 'showProfileWhenAdded'?
-node_modules/chrome-devtools-frontend/front_end/cpu_profiler_test_runner/ProfilerTestRunner.js(48,29): error TS2551: Property '_showProfileWhenAdded' does not exist on type 'typeof CPUProfilerTestRunner'. Did you mean 'showProfileWhenAdded'?
-node_modules/chrome-devtools-frontend/front_end/cpu_profiler_test_runner/ProfilerTestRunner.js(49,8): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/cpu_profiler_test_runner/ProfilerTestRunner.js(54,26): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/cpu_profiler_test_runner/ProfilerTestRunner.js(60,27): error TS2339: Property '_waitUntilProfileViewIsShownCallback' does not exist on type 'typeof CPUProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/cpu_profiler_test_runner/ProfilerTestRunner.js(65,29): error TS2339: Property '_waitUntilProfileViewIsShownCallback' does not exist on type 'typeof CPUProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/cpu_profiler_test_runner/ProfilerTestRunner.js(66,29): error TS2339: Property '_waitUntilProfileViewIsShownCallback' does not exist on type 'typeof CPUProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/cpu_profiler_test_runner/ProfilerTestRunner.js(66,81): error TS2339: Property '_profileHeader' does not exist on type 'typeof CPUProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/cpu_profiler_test_runner/ProfilerTestRunner.js(67,42): error TS2339: Property '_waitUntilProfileViewIsShownCallback' does not exist on type 'typeof CPUProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/cpu_profiler_test_runner/ProfilerTestRunner.js(68,34): error TS2339: Property '_waitUntilProfileViewIsShownCallback' does not exist on type 'typeof CPUProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(32,41): error TS2694: Namespace 'DataGrid' has no exported member 'ColumnDescriptor'.
+node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(32,41): error TS2694: Namespace 'DataGrid.DataGrid' has no exported member 'ColumnDescriptor'.
 node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(41,18): error TS2339: Property 'tabIndex' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(49,40): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(55,42): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(57,45): error TS2339: Property 'createChild' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(69,43): error TS2694: Namespace 'DataGrid' has no exported member 'ColumnDescriptor'.
-node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(71,52): error TS2694: Namespace 'DataGrid' has no exported member 'ColumnDescriptor'.
-node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(73,43): error TS2694: Namespace 'DataGrid' has no exported member 'ColumnDescriptor'.
+node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(69,43): error TS2694: Namespace 'DataGrid.DataGrid' has no exported member 'ColumnDescriptor'.
+node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(73,43): error TS2694: Namespace 'DataGrid.DataGrid' has no exported member 'ColumnDescriptor'.
 node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(82,54): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(84,47): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(86,45): error TS2339: Property 'createChild' does not exist on type 'Element'.
@@ -4807,13 +4705,13 @@ node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(94,42): er
 node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(96,45): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(98,48): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(109,26): error TS2352: Type 'DataGridNode<any>' cannot be converted to type 'NODE_TYPE'.
-node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(118,35): error TS2694: Namespace 'DataGrid' has no exported member 'ResizeMethod'.
+node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(118,35): error TS2694: Namespace 'DataGrid.DataGrid' has no exported member 'ResizeMethod'.
 node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(119,5): error TS2322: Type 'string' is not assignable to type '{ [x: string]: any; Nearest: string; First: string; Last: string; }'.
 node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(135,15): error TS2339: Property 'title' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(139,15): error TS2339: Property 'title' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(159,33): error TS2694: Namespace 'DataGrid' has no exported member 'ColumnDescriptor'.
+node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(159,33): error TS2694: Namespace 'DataGrid.DataGrid' has no exported member 'ColumnDescriptor'.
 node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(196,12): error TS2339: Property 'createChild' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(202,33): error TS2694: Namespace 'DataGrid' has no exported member 'ColumnDescriptor'.
+node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(202,33): error TS2694: Namespace 'DataGrid.DataGrid' has no exported member 'ColumnDescriptor'.
 node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(240,34): error TS2339: Property 'removeChildren' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(241,32): error TS2339: Property 'removeChildren' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(242,21): error TS2339: Property 'removeChildren' does not exist on type 'Element'.
@@ -4915,7 +4813,7 @@ node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(912,25): e
 node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(921,29): error TS2339: Property 'enclosingNodeOrSelfWithNodeName' does not exist on type 'Node'.
 node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(930,30): error TS2339: Property 'enclosingNodeOrSelfWithNodeName' does not exist on type 'Node'.
 node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(938,29): error TS2339: Property 'enclosingNodeOrSelfWithNodeName' does not exist on type 'EventTarget'.
-node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(960,33): error TS2694: Namespace 'DataGrid' has no exported member 'Order'.
+node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(960,33): error TS2694: Namespace 'DataGrid.DataGrid' has no exported member 'Order'.
 node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(983,32): error TS2339: Property 'selectable' does not exist on type 'NODE_TYPE'.
 node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(983,55): error TS2339: Property 'isEventWithinDisclosureTriangle' does not exist on type 'NODE_TYPE'.
 node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(990,15): error TS2339: Property 'metaKey' does not exist on type 'Event'.
@@ -4941,7 +4839,7 @@ node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(1065,18):
 node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(1067,17): error TS2339: Property 'altKey' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(1068,18): error TS2339: Property 'expandRecursively' does not exist on type 'NODE_TYPE'.
 node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(1070,18): error TS2339: Property 'expand' does not exist on type 'NODE_TYPE'.
-node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(1075,33): error TS2694: Namespace 'DataGrid' has no exported member 'ResizeMethod'.
+node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(1075,33): error TS2694: Namespace 'DataGrid.DataGrid' has no exported member 'ResizeMethod'.
 node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(1105,27): error TS2339: Property 'clientX' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(1105,50): error TS2339: Property 'totalOffsetLeft' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(1106,47): error TS2339: Property 'rows' does not exist on type 'Element'.
@@ -5035,13 +4933,13 @@ node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(1997,34):
 node_modules/chrome-devtools-frontend/front_end/data_grid/DataGrid.js(2008,1): error TS8022: JSDoc '@extends' is not attached to a class.
 node_modules/chrome-devtools-frontend/front_end/data_grid/ShowMoreDataGridNode.js(109,14): error TS2339: Property 'style' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/data_grid/SortableDataGrid.js(9,1): error TS8022: JSDoc '@extends' is not attached to a class.
-node_modules/chrome-devtools-frontend/front_end/data_grid/SortableDataGrid.js(11,40): error TS2694: Namespace 'DataGrid' has no exported member 'ColumnDescriptor'.
+node_modules/chrome-devtools-frontend/front_end/data_grid/SortableDataGrid.js(11,40): error TS2694: Namespace 'DataGrid.DataGrid' has no exported member 'ColumnDescriptor'.
+node_modules/chrome-devtools-frontend/front_end/data_grid/SortableDataGrid.js(19,5): error TS2322: Type '(a: SortableDataGridNode<any>, b: SortableDataGridNode<any>) => number' is not assignable to type '(arg0: NODE_TYPE, arg1: NODE_TYPE) => number'.
 node_modules/chrome-devtools-frontend/front_end/data_grid/SortableDataGrid.js(19,5): error TS2322: Type '(a: SortableDataGridNode<any>, b: SortableDataGridNode<any>) => number' is not assignable to type '(arg0: NODE_TYPE, arg1: NODE_TYPE) => number'.
   Types of parameters 'a' and 'arg0' are incompatible.
     Type 'NODE_TYPE' is not assignable to type 'SortableDataGridNode<any>'.
-node_modules/chrome-devtools-frontend/front_end/data_grid/SortableDataGrid.js(19,5): error TS2322: Type '(a: SortableDataGridNode<any>, b: SortableDataGridNode<any>) => number' is not assignable to type '(arg0: NODE_TYPE, arg1: NODE_TYPE) => number'.
 node_modules/chrome-devtools-frontend/front_end/data_grid/SortableDataGrid.js(20,80): error TS2345: Argument of type 'SortableDataGridNode<NODE_TYPE>' is not assignable to parameter of type 'NODE_TYPE'.
-node_modules/chrome-devtools-frontend/front_end/data_grid/SortableDataGrid.js(82,56): error TS2694: Namespace 'DataGrid' has no exported member 'ColumnDescriptor'.
+node_modules/chrome-devtools-frontend/front_end/data_grid/SortableDataGrid.js(82,56): error TS2694: Namespace 'DataGrid.DataGrid' has no exported member 'ColumnDescriptor'.
 node_modules/chrome-devtools-frontend/front_end/data_grid/SortableDataGrid.js(131,20): error TS2352: Type 'NODE_TYPE' cannot be converted to type 'SortableDataGridNode<NODE_TYPE>'.
 node_modules/chrome-devtools-frontend/front_end/data_grid/SortableDataGrid.js(141,21): error TS2339: Property 'recalculateSiblings' does not exist on type 'NODE_TYPE'.
 node_modules/chrome-devtools-frontend/front_end/data_grid/SortableDataGrid.js(142,21): error TS2339: Property '_sortChildren' does not exist on type 'NODE_TYPE'.
@@ -5055,11 +4953,11 @@ node_modules/chrome-devtools-frontend/front_end/data_grid/ViewportDataGrid.js(9,
 node_modules/chrome-devtools-frontend/front_end/data_grid/ViewportDataGrid.js(9,29): error TS2417: Class static side 'typeof ViewportDataGrid' incorrectly extends base class static side 'typeof DataGrid'.
   Types of property 'Events' are incompatible.
     Type '{ [x: string]: any; ViewportCalculated: symbol; }' is not assignable to type '{ [x: string]: any; SelectedNode: symbol; DeselectedNode: symbol; OpenedNode: symbol; SortingChan...'.
+      Property 'SelectedNode' is missing in type '{ [x: string]: any; ViewportCalculated: symbol; }'.
 node_modules/chrome-devtools-frontend/front_end/data_grid/ViewportDataGrid.js(9,29): error TS2417: Class static side 'typeof ViewportDataGrid' incorrectly extends base class static side 'typeof DataGrid'.
   Types of property 'Events' are incompatible.
     Type '{ [x: string]: any; ViewportCalculated: symbol; }' is not assignable to type '{ [x: string]: any; SelectedNode: symbol; DeselectedNode: symbol; OpenedNode: symbol; SortingChan...'.
-      Property 'SelectedNode' is missing in type '{ [x: string]: any; ViewportCalculated: symbol; }'.
-node_modules/chrome-devtools-frontend/front_end/data_grid/ViewportDataGrid.js(11,41): error TS2694: Namespace 'DataGrid' has no exported member 'ColumnDescriptor'.
+node_modules/chrome-devtools-frontend/front_end/data_grid/ViewportDataGrid.js(11,41): error TS2694: Namespace 'DataGrid.DataGrid' has no exported member 'ColumnDescriptor'.
 node_modules/chrome-devtools-frontend/front_end/data_grid/ViewportDataGrid.js(32,22): error TS2345: Argument of type 'ViewportDataGridNode<any>' is not assignable to parameter of type 'NODE_TYPE'.
 node_modules/chrome-devtools-frontend/front_end/data_grid/ViewportDataGrid.js(43,41): error TS2339: Property 'flatChildren' does not exist on type 'NODE_TYPE'.
 node_modules/chrome-devtools-frontend/front_end/data_grid/ViewportDataGrid.js(87,49): error TS2339: Property 'isScrolledToBottom' does not exist on type 'Element'.
@@ -5074,10 +4972,10 @@ node_modules/chrome-devtools-frontend/front_end/data_grid/ViewportDataGrid.js(25
 node_modules/chrome-devtools-frontend/front_end/data_grid/ViewportDataGrid.js(257,47): error TS2339: Property 'offsetHeight' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/data_grid/ViewportDataGrid.js(272,1): error TS8022: JSDoc '@extends' is not attached to a class.
 node_modules/chrome-devtools-frontend/front_end/data_grid/ViewportDataGrid.js(320,22): error TS2352: Type 'NODE_TYPE' cannot be converted to type 'ViewportDataGridNode<any>'.
-node_modules/chrome-devtools-frontend/front_end/data_grid/ViewportDataGrid.js(334,9): error TS2322: Type 'NODE_TYPE[][]' is not assignable to type 'ViewportDataGridNode<any>[][]'.
 node_modules/chrome-devtools-frontend/front_end/data_grid/ViewportDataGrid.js(334,9): error TS2322: Type 'NODE_TYPE[][]' is not assignable to type 'ViewportDataGridNode<any>[][]'.
   Type 'NODE_TYPE[]' is not assignable to type 'ViewportDataGridNode<any>[]'.
     Type 'NODE_TYPE' is not assignable to type 'ViewportDataGridNode<any>'.
+node_modules/chrome-devtools-frontend/front_end/data_grid/ViewportDataGrid.js(334,9): error TS2322: Type 'NODE_TYPE[][]' is not assignable to type 'ViewportDataGridNode<any>[][]'.
 node_modules/chrome-devtools-frontend/front_end/data_grid/ViewportDataGrid.js(363,15): error TS2339: Property 'parent' does not exist on type 'NODE_TYPE'.
 node_modules/chrome-devtools-frontend/front_end/data_grid/ViewportDataGrid.js(372,11): error TS2339: Property 'remove' does not exist on type 'NODE_TYPE'.
 node_modules/chrome-devtools-frontend/front_end/data_grid/ViewportDataGrid.js(373,11): error TS2339: Property 'parent' does not exist on type 'NODE_TYPE'.
@@ -5109,6 +5007,9 @@ node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(36,47): e
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(38,55): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(41,9): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(42,55): error TS2555: Expected at least 2 arguments, but got 1.
+node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(46,27): error TS2551: Property 'events' does not exist on type 'typeof InspectorFrontendHostAPI'. Did you mean 'Events'?
+node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(48,27): error TS2551: Property 'events' does not exist on type 'typeof InspectorFrontendHostAPI'. Did you mean 'Events'?
+node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(50,27): error TS2551: Property 'events' does not exist on type 'typeof InspectorFrontendHostAPI'. Did you mean 'Events'?
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(54,25): error TS2339: Property 'tabIndex' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(62,30): error TS2339: Property '_instanceObject' does not exist on type 'typeof DevicesView'.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(63,27): error TS2339: Property '_instanceObject' does not exist on type 'typeof DevicesView'.
@@ -5132,19 +5033,19 @@ node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(161,22):
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(164,34): error TS2694: Namespace 'Adb' has no exported member 'PortForwardingStatus'.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(179,9): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(180,38): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(191,29): error TS2339: Property 'setDevicesUpdatesEnabled' does not exist on type 'typeof InspectorFrontendHost'.
-node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(192,27): error TS2339: Property 'setDevicesUpdatesEnabled' does not exist on type 'typeof InspectorFrontendHost'.
-node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(201,29): error TS2339: Property 'setDevicesUpdatesEnabled' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(191,29): error TS2339: Property 'setDevicesUpdatesEnabled' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(192,27): error TS2339: Property 'setDevicesUpdatesEnabled' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(201,29): error TS2339: Property 'setDevicesUpdatesEnabled' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(211,25): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(212,9): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(214,62): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(220,29): error TS2339: Property 'setDevicesDiscoveryConfig' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(220,29): error TS2339: Property 'setDevicesDiscoveryConfig' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(223,29): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(224,44): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(227,9): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(229,21): error TS2694: Namespace 'Adb' has no exported member 'Config'.
-node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(237,29): error TS2339: Property 'setDevicesDiscoveryConfig' does not exist on type 'typeof InspectorFrontendHost'.
-node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(244,29): error TS2339: Property 'setDevicesDiscoveryConfig' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(237,29): error TS2339: Property 'setDevicesDiscoveryConfig' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(244,29): error TS2339: Property 'setDevicesDiscoveryConfig' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(250,19): error TS2694: Namespace 'Adb' has no exported member 'Config'.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(265,44): error TS2694: Namespace 'Adb' has no exported member 'PortForwardingRule'.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(272,45): error TS2339: Property 'createChild' does not exist on type 'Element'.
@@ -5153,11 +5054,9 @@ node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(279,45):
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(280,60): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(283,88): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(285,36): error TS2694: Namespace 'Adb' has no exported member 'PortForwardingRule'.
-node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(286,5): error TS2322: Type 'ListWidget<any>' is not assignable to type '{ [x: string]: any; renderItem(item: T, editable: boolean): Element; removeItemRequested(item: T,...'.
-  Type 'ListWidget<any>' is not assignable to type '{ [x: string]: any; renderItem(item: T, editable: boolean): Element; removeItemRequested(item: T,...'.
-    Property 'renderItem' is missing in type 'ListWidget<any>'.
-node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(286,5): error TS2322: Type 'ListWidget<any>' is not assignable to type '{ [x: string]: any; renderItem(item: T, editable: boolean): Element; removeItemRequested(item: T,...'.
-  Type 'ListWidget<any>' is not assignable to type '{ [x: string]: any; renderItem(item: T, editable: boolean): Element; removeItemRequested(item: T,...'.
+node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(286,36): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; renderItem(item: T, editable: boolean): Element; removeItemRequested(item: T,...'.
+  Type 'PortForwardingView' is not assignable to type '{ [x: string]: any; renderItem(item: T, editable: boolean): Element; removeItemRequested(item: T,...'.
+    Property '_callback' does not exist on type '{ [x: string]: any; renderItem(item: T, editable: boolean): Element; removeItemRequested(item: T,...'.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(290,31): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(293,43): error TS2694: Namespace 'Adb' has no exported member 'PortForwardingRule'.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(297,29): error TS2555: Expected at least 2 arguments, but got 1.
@@ -5182,14 +5081,12 @@ node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(450,67):
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(458,47): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(461,11): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(463,26): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(464,66): error TS2339: Property 'openInNewTab' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(464,66): error TS2339: Property 'openInNewTab' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(466,64): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(469,36): error TS2694: Namespace 'Adb' has no exported member 'PortForwardingRule'.
-node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(470,5): error TS2322: Type 'ListWidget<any>' is not assignable to type '{ [x: string]: any; renderItem(item: T, editable: boolean): Element; removeItemRequested(item: T,...'.
-  Type 'ListWidget<any>' is not assignable to type '{ [x: string]: any; renderItem(item: T, editable: boolean): Element; removeItemRequested(item: T,...'.
-node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(470,5): error TS2322: Type 'ListWidget<any>' is not assignable to type '{ [x: string]: any; renderItem(item: T, editable: boolean): Element; removeItemRequested(item: T,...'.
-  Type 'ListWidget<any>' is not assignable to type '{ [x: string]: any; renderItem(item: T, editable: boolean): Element; removeItemRequested(item: T,...'.
-    Property 'renderItem' is missing in type 'ListWidget<any>'.
+node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(470,36): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; renderItem(item: T, editable: boolean): Element; removeItemRequested(item: T,...'.
+  Type 'NetworkDiscoveryView' is not assignable to type '{ [x: string]: any; renderItem(item: T, editable: boolean): Element; removeItemRequested(item: T,...'.
+    Property '_nodeFrontend' does not exist on type '{ [x: string]: any; renderItem(item: T, editable: boolean): Element; removeItemRequested(item: T,...'.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(475,24): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(475,70): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(478,43): error TS2694: Namespace 'Adb' has no exported member 'PortForwardingRule'.
@@ -5211,11 +5108,11 @@ node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(620,9): e
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(622,44): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(623,36): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(625,42): error TS2339: Property 'createChild' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(627,50): error TS2694: Namespace 'DevicesView' has no exported member 'BrowserSection'.
+node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(627,50): error TS2694: Namespace 'Devices.DevicesView' has no exported member 'BrowserSection'.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(632,21): error TS2694: Namespace 'Adb' has no exported member 'Device'.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(637,19): error TS2694: Namespace 'Adb' has no exported member 'Device'.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(657,27): error TS2339: Property 'remove' does not exist on type 'Map<string, any>'.
-node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(675,36): error TS2694: Namespace 'DevicesView' has no exported member 'BrowserSection'.
+node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(675,36): error TS2694: Namespace 'Devices.DevicesView' has no exported member 'BrowserSection'.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(679,26): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(682,29): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(683,52): error TS2555: Expected at least 2 arguments, but got 1.
@@ -5228,13 +5125,13 @@ node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(715,11):
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(716,11): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(723,17): error TS2339: Property 'key' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(724,15): error TS2339: Property 'consume' does not exist on type 'Event'.
-node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(731,31): error TS2339: Property 'openRemotePage' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(731,31): error TS2339: Property 'openRemotePage' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(731,78): error TS2339: Property 'value' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(732,21): error TS2339: Property 'value' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(738,35): error TS2694: Namespace 'DevicesView' has no exported member 'BrowserSection'.
+node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(738,35): error TS2694: Namespace 'Devices.DevicesView' has no exported member 'BrowserSection'.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(739,19): error TS2694: Namespace 'Adb' has no exported member 'Browser'.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(745,44): error TS2339: Property 'sprintf' does not exist on type 'StringConstructor'.
-node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(783,36): error TS2694: Namespace 'DevicesView' has no exported member 'PageSection'.
+node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(783,36): error TS2694: Namespace 'Devices.DevicesView' has no exported member 'PageSection'.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(788,28): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(790,39): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(794,31): error TS2345: Argument of type 'ToolbarMenuButton' is not assignable to parameter of type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
@@ -5243,27 +5140,25 @@ node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(797,23):
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(805,47): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(806,47): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(807,47): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(815,31): error TS2339: Property 'performActionOnRemotePage' does not exist on type 'typeof InspectorFrontendHost'.
-node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(820,35): error TS2694: Namespace 'DevicesView' has no exported member 'PageSection'.
+node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(815,31): error TS2339: Property 'performActionOnRemotePage' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(820,35): error TS2694: Namespace 'Devices.DevicesView' has no exported member 'PageSection'.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(821,19): error TS2694: Namespace 'Adb' has no exported member 'Page'.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(838,19): error TS2694: Namespace 'Adb' has no exported member 'DevicePortForwardingStatus'.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(847,82): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(890,31): error TS2694: Namespace 'Adb' has no exported member 'Browser'.
-node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(890,179): error TS2694: Namespace 'DevicesView' has no exported member 'PageSection'.
-node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(890,194): error TS1003: Identifier expected.
+node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(890,179): error TS2694: Namespace 'Devices.DevicesView' has no exported member 'PageSection'.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(891,21): error TS2339: Property 'BrowserSection' does not exist on type 'typeof DevicesView'.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(893,28): error TS2694: Namespace 'Adb' has no exported member 'Page'.
-node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(893,105): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(894,21): error TS2339: Property 'PageSection' does not exist on type 'typeof DevicesView'.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(903,41): error TS2339: Property 'createChild' does not exist on type 'Element'.
+node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(908,27): error TS2551: Property 'events' does not exist on type 'typeof InspectorFrontendHostAPI'. Did you mean 'Events'?
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(911,21): error TS2694: Namespace 'Adb' has no exported member 'Config'.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(914,25): error TS2339: Property 'tabIndex' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(918,27): error TS2339: Property 'setDevicesUpdatesEnabled' does not exist on type 'typeof InspectorFrontendHost'.
-node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(919,27): error TS2339: Property 'setDevicesUpdatesEnabled' does not exist on type 'typeof InspectorFrontendHost'.
-node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(924,29): error TS2339: Property 'setDevicesDiscoveryConfig' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(918,27): error TS2339: Property 'setDevicesUpdatesEnabled' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(919,27): error TS2339: Property 'setDevicesUpdatesEnabled' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(924,29): error TS2339: Property 'setDevicesDiscoveryConfig' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(930,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/devices/DevicesView.js(933,36): error TS2694: Namespace 'Adb' has no exported member 'Config'.
-node_modules/chrome-devtools-frontend/front_end/devtools_compatibility.js(20,18): error TS2315: Type 'Object' is not generic.
 node_modules/chrome-devtools-frontend/front_end/devtools_compatibility.js(20,34): error TS1005: '>' expected.
 node_modules/chrome-devtools-frontend/front_end/devtools_compatibility.js(56,48): error TS2315: Type 'Object' is not generic.
 node_modules/chrome-devtools-frontend/front_end/devtools_compatibility.js(56,61): error TS1009: Trailing comma not allowed.
@@ -5301,7 +5196,6 @@ node_modules/chrome-devtools-frontend/front_end/diff/Diff.js(15,14): error TS233
 node_modules/chrome-devtools-frontend/front_end/diff/Diff.js(22,21): error TS2694: Namespace 'Diff' has no exported member 'Diff'.
 node_modules/chrome-devtools-frontend/front_end/diff/Diff.js(43,20): error TS2694: Namespace 'Diff' has no exported member 'Diff'.
 node_modules/chrome-devtools-frontend/front_end/diff/Diff.js(91,33): error TS2694: Namespace 'Diff' has no exported member 'Diff'.
-node_modules/chrome-devtools-frontend/front_end/diff/Diff.js(91,70): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/diff/diff_match_patch.js(6,116): error TS2322: Type 'string[]' is not assignable to type '{ [x: string]: any; chars1: string; chars2: string; lineArray: string[]; }'.
   Property 'chars1' is missing in type 'string[]'.
 node_modules/chrome-devtools-frontend/front_end/diff/diff_match_patch.js(6,240): error TS2322: Type '0' is not assignable to type '{ [x: string]: any; chars1: string; chars2: string; lineArray: string[]; }'.
@@ -5497,13 +5391,13 @@ node_modules/chrome-devtools-frontend/front_end/elements/ClassesPaneWidget.js(20
 node_modules/chrome-devtools-frontend/front_end/elements/ClassesPaneWidget.js(241,41): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/elements/ClassesPaneWidget.js(257,5): error TS2322: Type 'ToolbarToggle' is not assignable to type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
   Type 'ToolbarToggle' is not assignable to type '{ [x: string]: any; item(): any & any; }'.
-    Property 'item' is missing in type 'ToolbarToggle'.
 node_modules/chrome-devtools-frontend/front_end/elements/ClassesPaneWidget.js(257,5): error TS2322: Type 'ToolbarToggle' is not assignable to type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
   Type 'ToolbarToggle' is not assignable to type '{ [x: string]: any; item(): any & any; }'.
+    Property 'item' is missing in type 'ToolbarToggle'.
 node_modules/chrome-devtools-frontend/front_end/elements/ClassesPaneWidget.js(291,94): error TS2339: Property 'addAll' does not exist on type 'Set<any>'.
 node_modules/chrome-devtools-frontend/front_end/elements/ClassesPaneWidget.js(297,55): error TS2339: Property 'addAll' does not exist on type 'Set<any>'.
 node_modules/chrome-devtools-frontend/front_end/elements/ClassesPaneWidget.js(299,57): error TS2339: Property 'valuesArray' does not exist on type 'Set<any>'.
-node_modules/chrome-devtools-frontend/front_end/elements/ClassesPaneWidget.js(306,39): error TS2694: Namespace 'SuggestBox' has no exported member 'Suggestions'.
+node_modules/chrome-devtools-frontend/front_end/elements/ClassesPaneWidget.js(306,39): error TS2694: Namespace 'UI.SuggestBox' has no exported member 'Suggestions'.
 node_modules/chrome-devtools-frontend/front_end/elements/ColorSwatchPopoverIcon.js(18,32): error TS2339: Property 'title' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/elements/ColorSwatchPopoverIcon.js(18,40): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/elements/ColorSwatchPopoverIcon.js(20,77): error TS2339: Property 'consume' does not exist on type 'Event'.
@@ -5513,7 +5407,7 @@ node_modules/chrome-devtools-frontend/front_end/elements/ColorSwatchPopoverIcon.
 node_modules/chrome-devtools-frontend/front_end/elements/ColorSwatchPopoverIcon.js(103,29): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/elements/ColorSwatchPopoverIcon.js(104,32): error TS2339: Property 'title' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/elements/ColorSwatchPopoverIcon.js(106,77): error TS2339: Property 'consume' does not exist on type 'Event'.
-node_modules/chrome-devtools-frontend/front_end/elements/ColorSwatchPopoverIcon.js(122,28): error TS2694: Namespace 'CSSModel' has no exported member 'ContrastInfo'.
+node_modules/chrome-devtools-frontend/front_end/elements/ColorSwatchPopoverIcon.js(122,28): error TS2694: Namespace 'SDK.CSSModel' has no exported member 'ContrastInfo'.
 node_modules/chrome-devtools-frontend/front_end/elements/ColorSwatchPopoverIcon.js(134,11): error TS2339: Property 'consume' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/elements/ColorSwatchPopoverIcon.js(146,9): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; Original: string; Nickname: string; HEX: string; ShortHEX: string; HEXA: stri...' and 'string'.
 node_modules/chrome-devtools-frontend/front_end/elements/ColorSwatchPopoverIcon.js(149,36): error TS2345: Argument of type '{ [x: string]: any; Original: string; Nickname: string; HEX: string; ShortHEX: string; HEXA: stri...' is not assignable to parameter of type 'string'.
@@ -5530,16 +5424,17 @@ node_modules/chrome-devtools-frontend/front_end/elements/ComputedStyleModel.js(3
 node_modules/chrome-devtools-frontend/front_end/elements/ComputedStyleModel.js(65,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/elements/ComputedStyleModel.js(73,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/elements/ComputedStyleModel.js(84,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
+node_modules/chrome-devtools-frontend/front_end/elements/ComputedStyleModel.js(122,5): error TS2322: Type 'Promise<Map<string, string>>' is not assignable to type 'Promise<ComputedStyle>'.
 node_modules/chrome-devtools-frontend/front_end/elements/ComputedStyleModel.js(122,5): error TS2322: Type 'Promise<Map<string, string>>' is not assignable to type 'Promise<ComputedStyle>'.
   Type 'Map<string, string>' is not assignable to type 'ComputedStyle'.
     Property 'node' is missing in type 'Map<string, string>'.
-node_modules/chrome-devtools-frontend/front_end/elements/ComputedStyleModel.js(122,5): error TS2322: Type 'Promise<Map<string, string>>' is not assignable to type 'Promise<ComputedStyle>'.
 node_modules/chrome-devtools-frontend/front_end/elements/ComputedStyleWidget.js(48,36): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/elements/ComputedStyleWidget.js(51,9): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/elements/ComputedStyleWidget.js(52,49): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/elements/ComputedStyleWidget.js(57,31): error TS2345: Argument of type 'ToolbarSettingCheckbox' is not assignable to parameter of type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
   Type 'ToolbarSettingCheckbox' is not assignable to type '{ [x: string]: any; item(): any & any; }'.
 node_modules/chrome-devtools-frontend/front_end/elements/ComputedStyleWidget.js(58,71): error TS2555: Expected at least 2 arguments, but got 1.
+node_modules/chrome-devtools-frontend/front_end/elements/ComputedStyleWidget.js(73,12): error TS2339: Property '_filterRegex' does not exist on type 'ComputedStyleWidget'.
 node_modules/chrome-devtools-frontend/front_end/elements/ComputedStyleWidget.js(91,24): error TS2345: Argument of type '(Promise<CSSMatchedStyles> | Promise<ComputedStyle>)[]' is not assignable to parameter of type 'Iterable<CSSMatchedStyles | PromiseLike<CSSMatchedStyles>>'.
   Types of property '[Symbol.iterator]' are incompatible.
     Type '() => IterableIterator<Promise<CSSMatchedStyles> | Promise<ComputedStyle>>' is not assignable to type '() => Iterator<CSSMatchedStyles | PromiseLike<CSSMatchedStyles>>'.
@@ -5581,15 +5476,18 @@ node_modules/chrome-devtools-frontend/front_end/elements/ElementStatePaneWidget.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementStatePaneWidget.js(109,26): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementStatePaneWidget.js(124,5): error TS2322: Type 'ToolbarToggle' is not assignable to type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
   Type 'ToolbarToggle' is not assignable to type '{ [x: string]: any; item(): any & any; }'.
+    Property 'item' is missing in type 'ToolbarToggle'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementStatePaneWidget.js(124,5): error TS2322: Type 'ToolbarToggle' is not assignable to type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
   Type 'ToolbarToggle' is not assignable to type '{ [x: string]: any; item(): any & any; }'.
-    Property 'item' is missing in type 'ToolbarToggle'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsBreadcrumbs.js(12,46): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsBreadcrumbs.js(86,37): error TS2339: Property 'nextSiblingElement' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsBreadcrumbs.js(104,16): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsBreadcrumbs.js(215,38): error TS2339: Property 'offsetWidth' does not exist on type 'Element'.
+node_modules/chrome-devtools-frontend/front_end/elements/ElementsPanel.js(47,50): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; searchCanceled(): void; performSearch(searchConfig: SearchConfig, shouldJump:...'.
+  Type 'ElementsPanel' is not assignable to type '{ [x: string]: any; searchCanceled(): void; performSearch(searchConfig: SearchConfig, shouldJump:...'.
+    Property '_splitWidget' does not exist on type '{ [x: string]: any; searchCanceled(): void; performSearch(searchConfig: SearchConfig, shouldJump:...'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsPanel.js(49,41): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/elements/ElementsPanel.js(58,40): error TS2694: Namespace 'ElementsPanel' has no exported member '_splitMode'.
+node_modules/chrome-devtools-frontend/front_end/elements/ElementsPanel.js(58,40): error TS2694: Namespace 'Elements.ElementsPanel' has no exported member '_splitMode'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsPanel.js(90,32): error TS2339: Property 'addEventListener' does not exist on type 'typeof extensionServer'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsPanel.js(98,57): error TS2339: Property 'runtime' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsPanel.js(116,5): error TS2322: Type '{ [x: string]: any; tabbedPane(): TabbedPane; enableMoreTabsButton(): void; }' is not assignable to type '{ [x: string]: any; appendApplicableItems(locationName: string): void; appendView(view: { [x: str...'.
@@ -5608,6 +5506,11 @@ node_modules/chrome-devtools-frontend/front_end/elements/ElementsPanel.js(361,54
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsPanel.js(361,80): error TS2339: Property 'documentElement' does not exist on type 'DOMDocument'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsPanel.js(375,58): error TS2339: Property '_pendingNodeReveal' does not exist on type 'ElementsPanel'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsPanel.js(395,17): error TS2339: Property '_searchResults' does not exist on type 'ElementsPanel'.
+node_modules/chrome-devtools-frontend/front_end/elements/ElementsPanel.js(433,12): error TS2339: Property '_searchResults' does not exist on type 'ElementsPanel'.
+node_modules/chrome-devtools-frontend/front_end/elements/ElementsPanel.js(437,16): error TS2339: Property '_searchResults' does not exist on type 'ElementsPanel'.
+node_modules/chrome-devtools-frontend/front_end/elements/ElementsPanel.js(439,58): error TS2339: Property '_searchResults' does not exist on type 'ElementsPanel'.
+node_modules/chrome-devtools-frontend/front_end/elements/ElementsPanel.js(440,17): error TS2339: Property '_searchResults' does not exist on type 'ElementsPanel'.
+node_modules/chrome-devtools-frontend/front_end/elements/ElementsPanel.js(442,50): error TS2339: Property '_searchResults' does not exist on type 'ElementsPanel'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsPanel.js(472,19): error TS2694: Namespace 'UI' has no exported member 'PopoverRequest'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsPanel.js(477,19): error TS2339: Property 'parentElementOrShadowHost' does not exist on type 'EventTarget'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsPanel.js(482,17): error TS2339: Property 'boxInWindow' does not exist on type 'EventTarget'.
@@ -5616,7 +5519,6 @@ node_modules/chrome-devtools-frontend/front_end/elements/ElementsPanel.js(497,82
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsPanel.js(505,15): error TS2339: Property '_searchResults' does not exist on type 'ElementsPanel'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsPanel.js(514,15): error TS2339: Property '_searchResults' does not exist on type 'ElementsPanel'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsPanel.js(537,30): error TS2339: Property '_searchResults' does not exist on type 'ElementsPanel'.
-node_modules/chrome-devtools-frontend/front_end/elements/ElementsPanel.js(558,75): error TS2339: Property 'highlightedSearchResultClassName' does not exist on type 'typeof UI'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsPanel.js(560,20): error TS2339: Property 'scrollIntoViewIfNeeded' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsPanel.js(565,15): error TS2339: Property '_searchResults' does not exist on type 'ElementsPanel'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsPanel.js(565,39): error TS2339: Property '_searchResults' does not exist on type 'ElementsPanel'.
@@ -5627,7 +5529,7 @@ node_modules/chrome-devtools-frontend/front_end/elements/ElementsPanel.js(633,13
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsPanel.js(641,13): error TS2339: Property 'handled' does not exist on type 'KeyboardEvent'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsPanel.js(644,15): error TS2339: Property 'handled' does not exist on type 'KeyboardEvent'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsPanel.js(650,15): error TS2339: Property 'handled' does not exist on type 'KeyboardEvent'.
-node_modules/chrome-devtools-frontend/front_end/elements/ElementsPanel.js(705,31): error TS2339: Property 'inspectElementCompleted' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/elements/ElementsPanel.js(705,31): error TS2339: Property 'inspectElementCompleted' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsPanel.js(721,82): error TS2339: Property 'offsetWidth' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsPanel.js(723,39): error TS2339: Property 'offsetWidth' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsPanel.js(728,33): error TS2365: Operator '===' cannot be applied to types 'symbol' and '{ [x: string]: any; Vertical: symbol; Horizontal: symbol; Slim: symbol; }'.
@@ -5710,6 +5612,12 @@ node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeElement.js(
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeElement.js(762,13): error TS2339: Property 'style' does not exist on type 'Node'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeElement.js(767,32): error TS2339: Property 'style' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeElement.js(772,10): error TS2339: Property 'runtime' does not exist on type 'Window'.
+node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeElement.js(796,24): error TS2339: Property 'setMultilineEditing' does not exist on type 'TreeOutline'.
+node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeElement.js(803,29): error TS2339: Property 'style' does not exist on type 'Element'.
+node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeElement.js(803,60): error TS2339: Property 'visibleWidth' does not exist on type 'TreeOutline'.
+node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeElement.js(828,34): error TS2339: Property 'style' does not exist on type 'Element'.
+node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeElement.js(832,15): error TS2339: Property 'style' does not exist on type 'Node'.
+node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeElement.js(837,26): error TS2339: Property 'setMultilineEditing' does not exist on type 'TreeOutline'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeElement.js(851,18): error TS2339: Property 'altKey' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeElement.js(851,35): error TS2339: Property 'shiftKey' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeElement.js(852,55): error TS2339: Property 'isMetaOrCtrlForTest' does not exist on type 'Event'.
@@ -5755,22 +5663,20 @@ node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeElement.js(
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeElement.js(1533,40): error TS2339: Property 'createChild' does not exist on type 'DocumentFragment'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeElement.js(1537,18): error TS2339: Property 'createTextChild' does not exist on type 'DocumentFragment'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeElement.js(1577,26): error TS2694: Namespace 'Protocol' has no exported member 'Error'.
-node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeElement.js(1603,27): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHost'.
-node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeElement.js(1607,27): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHost'.
-node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeElement.js(1653,100): error TS1003: Identifier expected.
-node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeElement.js(1654,10): error TS2339: Property 'MultilineEditorController' does not exist on type 'typeof Elements'.
+node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeElement.js(1603,27): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeElement.js(1607,27): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeElementHighlighter.js(24,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeOutline.js(34,32): error TS2417: Class static side 'typeof ElementsTreeOutline' incorrectly extends base class static side 'typeof TreeOutline'.
   Types of property 'Events' are incompatible.
     Type '{ [x: string]: any; SelectedNodeChanged: symbol; ElementsTreeUpdated: symbol; }' is not assignable to type '{ [x: string]: any; ElementAttached: symbol; ElementExpanded: symbol; ElementCollapsed: symbol; E...'.
-      Property 'ElementAttached' is missing in type '{ [x: string]: any; SelectedNodeChanged: symbol; ElementsTreeUpdated: symbol; }'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeOutline.js(34,32): error TS2417: Class static side 'typeof ElementsTreeOutline' incorrectly extends base class static side 'typeof TreeOutline'.
   Types of property 'Events' are incompatible.
     Type '{ [x: string]: any; SelectedNodeChanged: symbol; ElementsTreeUpdated: symbol; }' is not assignable to type '{ [x: string]: any; ElementAttached: symbol; ElementExpanded: symbol; ElementCollapsed: symbol; E...'.
+      Property 'ElementAttached' is missing in type '{ [x: string]: any; SelectedNodeChanged: symbol; ElementsTreeUpdated: symbol; }'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeOutline.js(45,53): error TS2339: Property 'createChild' does not exist on type 'DocumentFragment'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeOutline.js(49,51): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeOutline.js(120,24): error TS2694: Namespace 'Elements' has no exported member 'MultilineEditorController'.
-node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeOutline.js(143,44): error TS2694: Namespace 'ElementsTreeOutline' has no exported member 'ClipboardData'.
+node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeOutline.js(143,44): error TS2694: Namespace 'Elements.ElementsTreeOutline' has no exported member 'ClipboardData'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeOutline.js(173,11): error TS2339: Property 'handled' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeOutline.js(197,11): error TS2339: Property 'handled' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeOutline.js(254,11): error TS2339: Property 'handled' does not exist on type 'Event'.
@@ -5781,11 +5687,18 @@ node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeOutline.js(
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeOutline.js(520,19): error TS2339: Property 'parentElementOrShadowHost' does not exist on type 'EventTarget'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeOutline.js(525,17): error TS2339: Property 'boxInWindow' does not exist on type 'EventTarget'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeOutline.js(527,29): error TS2339: Property 'enclosingNodeOrSelfWithNodeName' does not exist on type 'EventTarget'.
+node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeOutline.js(563,27): error TS2339: Property 'offsetWidth' does not exist on type 'Element'.
+node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeOutline.js(564,28): error TS2339: Property 'offsetHeight' does not exist on type 'Element'.
+node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeOutline.js(565,28): error TS2339: Property 'naturalWidth' does not exist on type 'Element'.
+node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeOutline.js(566,29): error TS2339: Property 'naturalHeight' does not exist on type 'Element'.
+node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeOutline.js(567,26): error TS2339: Property 'currentSrc' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeOutline.js(594,19): error TS2339: Property 'hovered' does not exist on type 'TreeElement'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeOutline.js(755,33): error TS2339: Property 'enclosingNodeOrSelfWithClass' does not exist on type 'EventTarget'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeOutline.js(758,36): error TS2339: Property 'enclosingNodeOrSelfWithClass' does not exist on type 'EventTarget'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeOutline.js(813,22): error TS2339: Property 'index' does not exist on type 'DOMNode'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeOutline.js(847,24): error TS2694: Namespace 'Protocol' has no exported member 'Error'.
+node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeOutline.js(920,9): error TS2322: Type 'Node' is not assignable to type 'Element'.
+node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeOutline.js(930,13): error TS2339: Property 'type' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeOutline.js(1010,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeOutline.js(1025,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeOutline.js(1034,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
@@ -5811,7 +5724,6 @@ node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeOutline.js(
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeOutline.js(1411,28): error TS2339: Property 'expandAllButtonElement' does not exist on type 'ElementsTreeElement'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeOutline.js(1412,26): error TS2339: Property 'expandAllButtonElement' does not exist on type 'ElementsTreeElement'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeOutline.js(1429,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeOutline.js(1442,53): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeOutline.js(1443,30): error TS2339: Property 'ClipboardData' does not exist on type 'typeof ElementsTreeOutline'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeOutline.js(1597,29): error TS2339: Property 'treeElementForTest' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeOutline.js(1613,26): error TS2339: Property 'createChild' does not exist on type 'Element'.
@@ -5819,6 +5731,8 @@ node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeOutline.js(
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeOutline.js(1621,26): error TS2339: Property 'createTextChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeOutline.js(1622,10): error TS2339: Property 'classList' does not exist on type 'Node'.
 node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeOutline.js(1623,24): error TS2555: Expected at least 2 arguments, but got 1.
+node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeOutline.js(1675,26): error TS2339: Property '_selectedDOMNode' does not exist on type 'TreeOutline'.
+node_modules/chrome-devtools-frontend/front_end/elements/ElementsTreeOutline.js(1676,26): error TS2339: Property '_selectedNodeChanged' does not exist on type 'TreeOutline'.
 node_modules/chrome-devtools-frontend/front_end/elements/EventListenersWidget.js(46,50): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/elements/EventListenersWidget.js(51,46): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/elements/EventListenersWidget.js(55,40): error TS2555: Expected at least 2 arguments, but got 1.
@@ -5828,18 +5742,8 @@ node_modules/chrome-devtools-frontend/front_end/elements/EventListenersWidget.js
 node_modules/chrome-devtools-frontend/front_end/elements/EventListenersWidget.js(73,15): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/elements/EventListenersWidget.js(77,46): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/elements/EventListenersWidget.js(129,52): error TS2339: Property 'value' does not exist on type 'EventTarget'.
-node_modules/chrome-devtools-frontend/front_end/elements/InspectElementModeController.js(35,27): error TS2339: Property 'Overlay' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/elements/InspectElementModeController.js(39,38): error TS2339: Property 'Overlay' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/elements/InspectElementModeController.js(50,33): error TS2339: Property 'Overlay' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/elements/InspectElementModeController.js(52,5): error TS2554: Expected 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/elements/InspectElementModeController.js(66,36): error TS2339: Property 'Overlay' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/elements/InspectElementModeController.js(67,33): error TS2339: Property 'Overlay' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/elements/InspectElementModeController.js(71,47): error TS2339: Property 'Overlay' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/elements/InspectElementModeController.js(81,23): error TS2339: Property 'Overlay' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/elements/InspectElementModeController.js(83,71): error TS2339: Property 'Overlay' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/elements/InspectElementModeController.js(84,71): error TS2339: Property 'Overlay' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/elements/InspectElementModeController.js(91,24): error TS2694: Namespace 'Protocol' has no exported member 'Overlay'.
-node_modules/chrome-devtools-frontend/front_end/elements/InspectElementModeController.js(104,27): error TS2339: Property 'Overlay' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/elements/MetricsSidebarPane.js(56,27): error TS2339: Property 'removeChildren' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/elements/MetricsSidebarPane.js(82,24): error TS2345: Argument of type '(Promise<Map<string, string>> | Promise<InlineStyleResult>)[]' is not assignable to parameter of type 'Iterable<Map<string, string> | PromiseLike<Map<string, string>>>'.
   Types of property '[Symbol.iterator]' are incompatible.
@@ -5856,7 +5760,7 @@ node_modules/chrome-devtools-frontend/front_end/elements/MetricsSidebarPane.js(8
                         Types of parameters 'onfulfilled' and 'onfulfilled' are incompatible.
                           Types of parameters 'value' and 'value' are incompatible.
                             Type 'InlineStyleResult' is not assignable to type 'Map<string, string>'.
-                              Property '[Symbol.toStringTag]' is missing in type 'InlineStyleResult'.
+                              Property 'clear' is missing in type 'InlineStyleResult'.
 node_modules/chrome-devtools-frontend/front_end/elements/MetricsSidebarPane.js(120,11): error TS2339: Property 'consume' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/elements/MetricsSidebarPane.js(164,22): error TS2339: Property 'toFixedIfFloating' does not exist on type 'NumberConstructor'.
 node_modules/chrome-devtools-frontend/front_end/elements/MetricsSidebarPane.js(179,18): error TS2345: Argument of type 'string' is not assignable to parameter of type 'number'.
@@ -5887,6 +5791,7 @@ node_modules/chrome-devtools-frontend/front_end/elements/MetricsSidebarPane.js(3
 node_modules/chrome-devtools-frontend/front_end/elements/MetricsSidebarPane.js(368,14): error TS2339: Property '_inlineStyle' does not exist on type 'never'.
 node_modules/chrome-devtools-frontend/front_end/elements/MetricsSidebarPane.js(368,48): error TS2339: Property 'originalPropertyData' does not exist on type 'never'.
 node_modules/chrome-devtools-frontend/front_end/elements/MetricsSidebarPane.js(369,18): error TS2339: Property 'originalPropertyData' does not exist on type 'never'.
+node_modules/chrome-devtools-frontend/front_end/elements/MetricsSidebarPane.js(441,14): error TS2339: Property 'originalPropertyData' does not exist on type 'MetricsSidebarPane'.
 node_modules/chrome-devtools-frontend/front_end/elements/PlatformFontsWidget.js(48,38): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/elements/PlatformFontsWidget.js(49,50): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/elements/PlatformFontsWidget.js(68,32): error TS2694: Namespace 'Protocol' has no exported member 'CSS'.
@@ -5894,12 +5799,16 @@ node_modules/chrome-devtools-frontend/front_end/elements/PlatformFontsWidget.js(
 node_modules/chrome-devtools-frontend/front_end/elements/PlatformFontsWidget.js(95,81): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/elements/PropertiesWidget.js(50,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/elements/PropertiesWidget.js(69,27): error TS2339: Property 'removeChildren' does not exist on type 'Element'.
+node_modules/chrome-devtools-frontend/front_end/elements/PropertiesWidget.js(131,27): error TS2339: Property 'removeChildren' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/elements/PropertiesWidget.js(153,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/elements/PropertiesWidget.js(156,34): error TS2345: Argument of type 'number' is not assignable to parameter of type '{ [x: string]: any; WindowDocked: number; WindowUndocked: number; ScriptsBreakpointSet: number; T...'.
 node_modules/chrome-devtools-frontend/front_end/elements/PropertiesWidget.js(162,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylePropertyHighlighter.js(29,25): error TS2339: Property 'property' does not exist on type 'TreeElement'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylePropertyHighlighter.js(43,42): error TS2339: Property 'scrollIntoViewIfNeeded' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/elements/StylePropertyHighlighter.js(44,42): error TS2339: Property 'animate' does not exist on type 'Element'.
+node_modules/chrome-devtools-frontend/front_end/elements/StylePropertyHighlighter.js(45,9): error TS2345: Argument of type '{ offset: number; backgroundColor: string; }[]' is not assignable to parameter of type 'PropertyIndexedKeyframes | Keyframe[]'.
+  Type '{ offset: number; backgroundColor: string; }[]' is not assignable to type 'Keyframe[]'.
+    Type '{ offset: number; backgroundColor: string; }' is not assignable to type 'Keyframe'.
+      Property 'alignContent' is missing in type '{ offset: number; backgroundColor: string; }'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(35,18): error TS2339: Property 'tabIndex' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(50,51): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(69,32): error TS2339: Property '_instance' does not exist on type 'typeof StylesSidebarPane'.
@@ -5927,8 +5836,6 @@ node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(26
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(293,19): error TS2339: Property 'isBlank' does not exist on type 'StylePropertiesSection'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(323,81): error TS2339: Property 'style' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(364,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(413,30): error TS2339: Property 'DOM' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(414,33): error TS2339: Property 'DOM' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(415,43): error TS2339: Property 'valuesArray' does not exist on type 'Set<any>'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(438,16): error TS2403: Subsequent variable declarations must have the same type.  Variable 'section' must be of type 'StylePropertiesSection', but here has type 'any'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(441,27): error TS2339: Property 'focus' does not exist on type 'Element'.
@@ -5939,6 +5846,7 @@ node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(59
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(595,49): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(642,32): error TS2339: Property 'style' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(644,32): error TS2339: Property 'style' does not exist on type 'Element'.
+node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(656,32): error TS2339: Property 'style' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(687,24): error TS2694: Namespace 'Protocol' has no exported member 'DOM'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(704,36): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(716,22): error TS2339: Property 'createTextChild' does not exist on type 'Element'.
@@ -6026,7 +5934,7 @@ node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(15
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(1537,11): error TS2339: Property 'consume' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(1545,38): error TS2339: Property 'enclosingNodeOrSelfWithClass' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(1558,13): error TS2339: Property 'getComponentSelection' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(1575,50): error TS2694: Namespace 'StylePropertyTreeElement' has no exported member 'Context'.
+node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(1575,50): error TS2694: Namespace 'Elements.StylePropertyTreeElement' has no exported member 'Context'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(1611,22): error TS2339: Property 'classList' does not exist on type 'EventTarget'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(1612,51): error TS2339: Property '_selectorIndex' does not exist on type 'EventTarget'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(1613,13): error TS2339: Property 'consume' does not exist on type 'Event'.
@@ -6038,7 +5946,7 @@ node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(16
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(1679,39): error TS2339: Property 'inherited' does not exist on type 'TreeElement'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(1684,20): error TS2339: Property 'startEditing' does not exist on type 'TreeElement'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(1684,44): error TS2339: Property 'nameElement' does not exist on type 'TreeElement'.
-node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(1698,50): error TS2694: Namespace 'StylePropertyTreeElement' has no exported member 'Context'.
+node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(1698,50): error TS2694: Namespace 'Elements.StylePropertyTreeElement' has no exported member 'Context'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(1759,33): error TS2339: Property 'selectorRange' does not exist on type 'CSSRule'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(1762,17): error TS2339: Property 'setSelectorText' does not exist on type 'CSSRule'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(1798,18): error TS2339: Property 'style' does not exist on type 'Element'.
@@ -6049,14 +5957,14 @@ node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(18
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(1809,20): error TS2339: Property 'focus' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(1833,57): error TS2339: Property 'media' does not exist on type 'CSSRule'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(1843,75): error TS2339: Property 'peekLast' does not exist on type 'string[]'.
-node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(1866,49): error TS2694: Namespace 'StylePropertyTreeElement' has no exported member 'Context'.
+node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(1866,49): error TS2694: Namespace 'Elements.StylePropertyTreeElement' has no exported member 'Context'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(1963,35): error TS2339: Property 'key' does not exist on type 'CSSRule'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(1984,25): error TS2339: Property 'key' does not exist on type 'CSSRule'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(1987,17): error TS2339: Property 'setKeyText' does not exist on type 'CSSRule'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2018,64): error TS2339: Property 'key' does not exist on type 'CSSRule'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2109,7): error TS2362: The left-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2109,46): error TS2339: Property '_updateFilter' does not exist on type 'TreeElement'.
-node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2148,30): error TS2694: Namespace 'CSSModel' has no exported member 'ContrastInfo'.
+node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2148,30): error TS2694: Namespace 'SDK.CSSModel' has no exported member 'ContrastInfo'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2266,49): error TS2339: Property 'section' does not exist on type 'TreeOutline'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2279,34): error TS2339: Property 'checked' does not exist on type 'EventTarget'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2298,11): error TS2339: Property 'consume' does not exist on type 'Event'.
@@ -6076,16 +5984,16 @@ node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(24
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2439,11): error TS2339: Property 'consume' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2481,37): error TS2339: Property 'enclosingNodeOrSelfWithClass' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2482,25): error TS2339: Property 'enclosingNodeOrSelfWithClass' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2513,51): error TS2694: Namespace 'StylePropertyTreeElement' has no exported member 'Context'.
-node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2529,51): error TS2694: Namespace 'StylePropertyTreeElement' has no exported member 'Context'.
+node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2513,51): error TS2694: Namespace 'Elements.StylePropertyTreeElement' has no exported member 'Context'.
+node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2529,51): error TS2694: Namespace 'Elements.StylePropertyTreeElement' has no exported member 'Context'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2534,24): error TS2339: Property 'clipboardData' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2556,43): error TS2339: Property 'textContent' does not exist on type 'EventTarget'.
-node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2560,51): error TS2694: Namespace 'StylePropertyTreeElement' has no exported member 'Context'.
+node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2560,51): error TS2694: Namespace 'Elements.StylePropertyTreeElement' has no exported member 'Context'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2565,31): error TS2339: Property 'textContent' does not exist on type 'EventTarget'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2575,35): error TS2339: Property 'scrollIntoViewIfNeeded' does not exist on type 'HTMLElement'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2585,71): error TS2339: Property 'naturalOrderComparator' does not exist on type 'StringConstructor'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2604,19): error TS2339: Property 'getComponentSelection' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2608,49): error TS2694: Namespace 'StylePropertyTreeElement' has no exported member 'Context'.
+node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2608,49): error TS2694: Namespace 'Elements.StylePropertyTreeElement' has no exported member 'Context'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2612,15): error TS2339: Property 'handled' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2619,22): error TS2339: Property 'keyCode' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2619,77): error TS2339: Property 'key' does not exist on type 'Event'.
@@ -6095,15 +6003,15 @@ node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(26
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2630,22): error TS2339: Property 'shiftKey' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2641,47): error TS2339: Property 'textContent' does not exist on type 'EventTarget'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2645,13): error TS2339: Property 'consume' does not exist on type 'Event'.
-node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2651,49): error TS2694: Namespace 'StylePropertyTreeElement' has no exported member 'Context'.
+node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2651,49): error TS2694: Namespace 'Elements.StylePropertyTreeElement' has no exported member 'Context'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2675,45): error TS2339: Property 'charCode' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2679,58): error TS2339: Property 'textContent' does not exist on type 'EventTarget'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2679,84): error TS2339: Property 'selectionLeftOffset' does not exist on type 'EventTarget'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2682,13): error TS2339: Property 'consume' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2683,43): error TS2339: Property 'textContent' does not exist on type 'EventTarget'.
-node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2699,49): error TS2694: Namespace 'StylePropertyTreeElement' has no exported member 'Context'.
-node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2715,49): error TS2694: Namespace 'StylePropertyTreeElement' has no exported member 'Context'.
-node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2750,49): error TS2694: Namespace 'StylePropertyTreeElement' has no exported member 'Context'.
+node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2699,49): error TS2694: Namespace 'Elements.StylePropertyTreeElement' has no exported member 'Context'.
+node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2715,49): error TS2694: Namespace 'Elements.StylePropertyTreeElement' has no exported member 'Context'.
+node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2750,49): error TS2694: Namespace 'Elements.StylePropertyTreeElement' has no exported member 'Context'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2765,40): error TS2363: The right-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2769,7): error TS2322: Type 'StylePropertyTreeElement' is not assignable to type 'this'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2780,32): error TS2339: Property 'isWhitespace' does not exist on type 'string'.
@@ -6115,17 +6023,17 @@ node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(28
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2838,99): error TS2339: Property 'valueElement' does not exist on type 'TreeElement'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2839,25): error TS2339: Property 'startEditing' does not exist on type 'TreeElement'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2849,61): error TS2363: The right-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type.
+node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2857,9): error TS2322: Type 'StylePropertyTreeElement' is not assignable to type 'this'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2906,7): error TS2322: Type 'Promise<void>' is not assignable to type 'Promise<undefined>'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2910,7): error TS2322: Type 'Promise<void>' is not assignable to type 'Promise<undefined>'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2918,7): error TS2322: Type 'Promise<void>' is not assignable to type 'Promise<undefined>'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2956,5): error TS2322: Type 'Promise<boolean>' is not assignable to type 'Promise<undefined>'.
-node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2977,107): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2978,35): error TS2300: Duplicate identifier 'Context'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(2978,35): error TS2339: Property 'Context' does not exist on type 'typeof StylePropertyTreeElement'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(3021,19): error TS2339: Property 'key' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(3049,13): error TS2339: Property 'consume' does not exist on type 'Event'.
-node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(3120,39): error TS2694: Namespace 'SuggestBox' has no exported member 'Suggestions'.
-node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(3244,29): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(3120,39): error TS2694: Namespace 'UI.SuggestBox' has no exported member 'Suggestions'.
+node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(3244,39): error TS2339: Property 'splitStringByRegexes' does not exist on type 'typeof TextUtils'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(3265,15): error TS2339: Property 'createTextChild' does not exist on type 'DocumentFragment'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(3272,15): error TS2339: Property 'createTextChild' does not exist on type 'DocumentFragment'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(3282,41): error TS2555: Expected at least 2 arguments, but got 1.
@@ -6134,57 +6042,17 @@ node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(33
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(3312,32): error TS2339: Property '_instance' does not exist on type 'typeof StylesSidebarPane'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(3320,5): error TS2322: Type 'ToolbarButton' is not assignable to type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
   Type 'ToolbarButton' is not assignable to type '{ [x: string]: any; item(): any & any; }'.
+    Property 'item' is missing in type 'ToolbarButton'.
 node_modules/chrome-devtools-frontend/front_end/elements/StylesSidebarPane.js(3320,5): error TS2322: Type 'ToolbarButton' is not assignable to type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
   Type 'ToolbarButton' is not assignable to type '{ [x: string]: any; item(): any & any; }'.
-    Property 'item' is missing in type 'ToolbarButton'.
 node_modules/chrome-devtools-frontend/front_end/elements_test_runner/EditDOMTestRunner.js(15,5): error TS2304: Cannot find name 'eventSender'.
-node_modules/chrome-devtools-frontend/front_end/elements_test_runner/EditDOMTestRunner.js(19,30): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/elements_test_runner/ElementsTestRunner.js(79,14): error TS2339: Property 'domModel' does not exist on type 'typeof TestRunner'.
 node_modules/chrome-devtools-frontend/front_end/elements_test_runner/ElementsTestRunner.js(112,55): error TS2339: Property 'eventListener' does not exist on type 'TreeElement'.
-node_modules/chrome-devtools-frontend/front_end/elements_test_runner/ElementsTestRunner.js(128,13): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/elements_test_runner/ElementsTestRunner.js(132,13): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/elements_test_runner/ElementsTestRunner.js(191,13): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/elements_test_runner/ElementsTestRunner.js(199,30): error TS2339: Property 'domModel' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/elements_test_runner/ElementsTestRunner.js(200,33): error TS2339: Property 'domModel' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/elements_test_runner/ElementsTestRunner.js(201,23): error TS2339: Property 'domModel' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/elements_test_runner/ElementsTestRunner.js(316,13): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/elements_test_runner/ElementsTestRunner.js(322,6): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/elements_test_runner/ElementsTestRunner.js(326,26): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
 node_modules/chrome-devtools-frontend/front_end/elements_test_runner/ElementsTestRunner.js(372,22): error TS2339: Property 'sprintf' does not exist on type 'StringConstructor'.
-node_modules/chrome-devtools-frontend/front_end/elements_test_runner/ElementsTestRunner.js(384,26): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
 node_modules/chrome-devtools-frontend/front_end/elements_test_runner/ElementsTestRunner.js(429,28): error TS2339: Property 'sprintf' does not exist on type 'StringConstructor'.
 node_modules/chrome-devtools-frontend/front_end/elements_test_runner/ElementsTestRunner.js(490,15): error TS2339: Property 'runtime' does not exist on type 'Window'.
-node_modules/chrome-devtools-frontend/front_end/elements_test_runner/ElementsTestRunner.js(549,26): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
 node_modules/chrome-devtools-frontend/front_end/elements_test_runner/ElementsTestRunner.js(735,11): error TS2540: Cannot assign to 'name' because it is a constant or a read-only property.
-node_modules/chrome-devtools-frontend/front_end/elements_test_runner/ElementsTestRunner.js(790,19): error TS2339: Property 'domModel' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/elements_test_runner/ElementsTestRunner.js(1024,19): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/elements_test_runner/ElementsTestRunner.js(1048,6): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/elements_test_runner/ElementsTestRunner.js(1052,6): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/elements_test_runner/ElementsTestRunner.js(1073,35): error TS2339: Property 'OverlayAgent' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/elements_test_runner/ElementsTestRunner.js(1080,35): error TS2339: Property 'AnimationTimeline' does not exist on type '{ new (effect?: AnimationEffectReadOnly, timeline?: AnimationTimeline): Animation; prototype: Ani...'.
-node_modules/chrome-devtools-frontend/front_end/elements_test_runner/SetOuterHTMLTestRunner.js(10,20): error TS2339: Property 'events' does not exist on type 'typeof ElementsTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/elements_test_runner/SetOuterHTMLTestRunner.js(11,20): error TS2339: Property 'containerId' does not exist on type 'typeof ElementsTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/elements_test_runner/SetOuterHTMLTestRunner.js(21,24): error TS2339: Property 'containerId' does not exist on type 'typeof ElementsTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/elements_test_runner/SetOuterHTMLTestRunner.js(22,16): error TS2339: Property 'DOMAgent' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/elements_test_runner/SetOuterHTMLTestRunner.js(22,57): error TS2339: Property 'containerId' does not exist on type 'typeof ElementsTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/elements_test_runner/SetOuterHTMLTestRunner.js(26,24): error TS2339: Property 'containerText' does not exist on type 'typeof ElementsTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/elements_test_runner/SetOuterHTMLTestRunner.js(34,18): error TS2339: Property 'domModel' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/elements_test_runner/SetOuterHTMLTestRunner.js(54,22): error TS2339: Property 'events' does not exist on type 'typeof ElementsTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/elements_test_runner/SetOuterHTMLTestRunner.js(59,54): error TS2339: Property 'containerText' does not exist on type 'typeof ElementsTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/elements_test_runner/SetOuterHTMLTestRunner.js(64,61): error TS2339: Property 'containerText' does not exist on type 'typeof ElementsTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/elements_test_runner/SetOuterHTMLTestRunner.js(72,61): error TS2339: Property 'containerText' does not exist on type 'typeof ElementsTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/elements_test_runner/SetOuterHTMLTestRunner.js(87,20): error TS2339: Property 'DOMAgent' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/elements_test_runner/SetOuterHTMLTestRunner.js(87,61): error TS2339: Property 'containerId' does not exist on type 'typeof ElementsTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/elements_test_runner/SetOuterHTMLTestRunner.js(88,14): error TS2339: Property 'domModel' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/elements_test_runner/SetOuterHTMLTestRunner.js(93,33): error TS2339: Property 'RuntimeAgent' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/elements_test_runner/SetOuterHTMLTestRunner.js(95,22): error TS2339: Property 'events' does not exist on type 'typeof ElementsTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/elements_test_runner/SetOuterHTMLTestRunner.js(97,42): error TS2339: Property 'events' does not exist on type 'typeof ElementsTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/elements_test_runner/SetOuterHTMLTestRunner.js(98,45): error TS2339: Property 'events' does not exist on type 'typeof ElementsTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/elements_test_runner/SetOuterHTMLTestRunner.js(100,22): error TS2339: Property 'events' does not exist on type 'typeof ElementsTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/elements_test_runner/SetOuterHTMLTestRunner.js(101,31): error TS2339: Property 'DOMAgent' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/elements_test_runner/SetOuterHTMLTestRunner.js(101,72): error TS2339: Property 'containerId' does not exist on type 'typeof ElementsTestRunner'.
+node_modules/chrome-devtools-frontend/front_end/elements_test_runner/ElementsTestRunner.js(1080,35): error TS2339: Property 'AnimationTimeline' does not exist on type '{ new (effect?: AnimationEffect, timeline?: AnimationTimeline): Animation; prototype: Animation; }'.
 node_modules/chrome-devtools-frontend/front_end/elements_test_runner/StylesUpdateLinksTestRunner.js(99,35): error TS2339: Property 'sprintf' does not exist on type 'StringConstructor'.
-node_modules/chrome-devtools-frontend/front_end/elements_test_runner/StylesUpdateLinksTestRunner.js(119,24): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
 node_modules/chrome-devtools-frontend/front_end/emulation/AdvancedApp.js(56,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/emulation/AdvancedApp.js(92,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/emulation/AdvancedApp.js(105,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
@@ -6192,53 +6060,45 @@ node_modules/chrome-devtools-frontend/front_end/emulation/AdvancedApp.js(124,22)
 node_modules/chrome-devtools-frontend/front_end/emulation/AdvancedApp.js(142,44): error TS2339: Property 'style' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/emulation/AdvancedApp.js(169,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/emulation/AdvancedApp.js(174,57): error TS2339: Property 'window' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/emulation/AdvancedApp.js(181,27): error TS2339: Property 'setInspectedPageBounds' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/emulation/AdvancedApp.js(181,27): error TS2339: Property 'setInspectedPageBounds' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/emulation/AdvancedApp.js(199,5): error TS2322: Type 'AdvancedApp' is not assignable to type '{ [x: string]: any; presentUI(document: Document): void; }'.
-  Property '_rootSplitWidget' does not exist on type '{ [x: string]: any; presentUI(document: Document): void; }'.
 node_modules/chrome-devtools-frontend/front_end/emulation/AdvancedApp.js(199,5): error TS2322: Type 'AdvancedApp' is not assignable to type '{ [x: string]: any; presentUI(document: Document): void; }'.
+  Property '_rootSplitWidget' does not exist on type '{ [x: string]: any; presentUI(document: Document): void; }'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(9,1): error TS8022: JSDoc '@extends' is not attached to a class.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(50,81): error TS2345: Argument of type 'symbol' is not assignable to parameter of type '{ [x: string]: any; Global: symbol; Local: symbol; Session: symbol; }'.
-node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(52,43): error TS2694: Namespace 'DeviceModeModel' has no exported member 'Type'.
+node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(52,43): error TS2694: Namespace 'Emulation.DeviceModeModel' has no exported member 'Type'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(53,5): error TS2322: Type 'string' is not assignable to type '{ [x: string]: any; None: string; Responsive: string; Device: string; }'.
-node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(56,42): error TS2694: Namespace 'EmulatedDevice' has no exported member 'Mode'.
+node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(56,42): error TS2694: Namespace 'Emulation.EmulatedDevice' has no exported member 'Mode'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(75,34): error TS2365: Operator '>=' cannot be applied to types 'string' and 'number'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(76,9): error TS2365: Operator '<=' cannot be applied to types 'string' and 'number'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(86,59): error TS2365: Operator '>=' cannot be applied to types 'string' and 'number'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(86,73): error TS2365: Operator '<=' cannot be applied to types 'string' and 'number'.
-node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(103,41): error TS2694: Namespace 'DeviceModeModel' has no exported member 'Type'.
-node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(105,40): error TS2694: Namespace 'EmulatedDevice' has no exported member 'Mode'.
+node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(103,41): error TS2694: Namespace 'Emulation.DeviceModeModel' has no exported member 'Type'.
+node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(105,40): error TS2694: Namespace 'Emulation.EmulatedDevice' has no exported member 'Mode'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(112,9): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; None: string; Responsive: string; Device: string; }' and 'string'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(128,9): error TS2365: Operator '!==' cannot be applied to types '{ [x: string]: any; None: string; Responsive: string; Device: string; }' and 'string'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(129,36): error TS2345: Argument of type 'number' is not assignable to parameter of type '{ [x: string]: any; WindowDocked: number; WindowUndocked: number; ScriptsBreakpointSet: number; T...'.
-node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(186,41): error TS2694: Namespace 'EmulatedDevice' has no exported member 'Mode'.
-node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(193,42): error TS2694: Namespace 'DeviceModeModel' has no exported member 'Type'.
-node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(264,42): error TS2694: Namespace 'DeviceModeModel' has no exported member 'UA'.
+node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(186,41): error TS2694: Namespace 'Emulation.EmulatedDevice' has no exported member 'Mode'.
+node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(193,42): error TS2694: Namespace 'Emulation.DeviceModeModel' has no exported member 'Type'.
+node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(264,42): error TS2694: Namespace 'Emulation.DeviceModeModel' has no exported member 'UA'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(282,12): error TS2678: Type 'string' is not comparable to type '{ [x: string]: any; None: string; Responsive: string; Device: string; }'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(284,12): error TS2678: Type 'string' is not comparable to type '{ [x: string]: any; None: string; Responsive: string; Device: string; }'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(286,12): error TS2678: Type 'string' is not comparable to type '{ [x: string]: any; None: string; Responsive: string; Device: string; }'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(419,9): error TS2365: Operator '!==' cannot be applied to types '{ [x: string]: any; None: string; Responsive: string; Device: string; }' and 'string'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(431,9): error TS2365: Operator '!==' cannot be applied to types '{ [x: string]: any; None: string; Responsive: string; Device: string; }' and 'string'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(443,9): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; None: string; Responsive: string; Device: string; }' and 'string'.
-node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(458,24): error TS2339: Property 'Emulation' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(459,24): error TS2339: Property 'Emulation' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(463,16): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; None: string; Responsive: string; Device: string; }' and 'string'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(471,16): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; None: string; Responsive: string; Device: string; }' and 'string'.
-node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(484,50): error TS2339: Property 'Emulation' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(485,50): error TS2339: Property 'Emulation' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(495,48): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; None: string; Responsive: string; Device: string; }' and 'string'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(496,35): error TS2345: Argument of type 'string' is not assignable to parameter of type 'symbol'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(554,24): error TS2694: Namespace 'Protocol' has no exported member 'Emulation'.
-node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(576,40): error TS2339: Property 'Emulation' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(633,24): error TS2694: Namespace 'Protocol' has no exported member 'Page'.
-node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(661,22): error TS2339: Property 'Emulation' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(662,22): error TS2339: Property 'Emulation' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(664,44): error TS2339: Property 'Emulation' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(665,23): error TS2339: Property 'screenOrientation' does not exist on type '{ width: number; height: number; deviceScaleFactor: number; mobile: boolean; }'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(712,11): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(713,18): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(714,12): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeModel.js(715,17): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeToolbar.js(25,74): error TS2694: Namespace 'EmulatedDevice' has no exported member 'Mode'.
+node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeToolbar.js(25,74): error TS2694: Namespace 'Emulation.EmulatedDevice' has no exported member 'Mode'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeToolbar.js(33,39): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeToolbar.js(43,40): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeToolbar.js(87,31): error TS2345: Argument of type 'ToolbarMenuButton' is not assignable to parameter of type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
@@ -6274,7 +6134,7 @@ node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeToolbar.js(2
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeToolbar.js(248,63): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeToolbar.js(249,63): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeToolbar.js(250,63): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeToolbar.js(276,43): error TS2694: Namespace 'DeviceModeModel' has no exported member 'UA'.
+node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeToolbar.js(276,43): error TS2694: Namespace 'Emulation.DeviceModeModel' has no exported member 'UA'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeToolbar.js(290,66): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeToolbar.js(291,9): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeToolbar.js(291,47): error TS2365: Operator '!==' cannot be applied to types '{ [x: string]: any; None: string; Responsive: string; Device: string; }' and 'string'.
@@ -6306,8 +6166,8 @@ node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeToolbar.js(4
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeToolbar.js(460,78): error TS2339: Property 'offsetHeight' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeToolbar.js(461,55): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeToolbar.js(462,57): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeToolbar.js(482,42): error TS2694: Namespace 'EmulatedDevice' has no exported member 'Mode'.
-node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeToolbar.js(490,42): error TS2694: Namespace 'EmulatedDevice' has no exported member 'Mode'.
+node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeToolbar.js(482,42): error TS2694: Namespace 'Emulation.EmulatedDevice' has no exported member 'Mode'.
+node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeToolbar.js(490,42): error TS2694: Namespace 'Emulation.EmulatedDevice' has no exported member 'Mode'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeToolbar.js(507,24): error TS2339: Property 'disabled' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeToolbar.js(507,35): error TS2365: Operator '!==' cannot be applied to types '{ [x: string]: any; None: string; Responsive: string; Device: string; }' and 'string'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeToolbar.js(508,25): error TS2339: Property 'disabled' does not exist on type 'Element'.
@@ -6326,7 +6186,7 @@ node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeToolbar.js(5
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeToolbar.js(551,18): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; None: string; Responsive: string; Device: string; }' and 'string'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeToolbar.js(553,35): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeToolbar.js(560,9): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; None: string; Responsive: string; Device: string; }' and 'string'.
-node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeToolbar.js(563,48): error TS2694: Namespace 'EmulatedDevice' has no exported member 'Mode'.
+node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeToolbar.js(563,48): error TS2694: Namespace 'Emulation.EmulatedDevice' has no exported member 'Mode'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeToolbar.js(566,57): error TS2365: Operator '!==' cannot be applied to types '{ [x: string]: any; None: string; Responsive: string; Device: string; }' and 'string'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeToolbar.js(596,25): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; None: string; Responsive: string; Device: string; }'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeView.js(15,24): error TS2339: Property 'singleton' does not exist on type 'Window'.
@@ -6362,22 +6222,18 @@ node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeView.js(481,
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeView.js(482,12): error TS2339: Property 'href' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeView.js(483,12): error TS2339: Property 'click' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeView.js(500,22): error TS2339: Property 'createChild' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeWrapper.js(13,30): error TS2339: Property '_wrapperInstance' does not exist on type 'typeof DeviceModeView'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeWrapper.js(18,22): error TS2339: Property 'singleton' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeWrapper.js(33,24): error TS2694: Namespace 'Protocol' has no exported member 'Page'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeWrapper.js(50,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeWrapper.js(53,37): error TS2694: Namespace 'Protocol' has no exported member 'Page'.
-node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeWrapper.js(84,26): error TS2339: Property '_wrapperInstance' does not exist on type 'typeof DeviceModeView'.
-node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeWrapper.js(98,34): error TS2339: Property '_wrapperInstance' does not exist on type 'typeof DeviceModeView'.
-node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeWrapper.js(101,43): error TS2339: Property '_wrapperInstance' does not exist on type 'typeof DeviceModeView'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeWrapper.js(120,45): error TS2694: Namespace 'Protocol' has no exported member 'Page'.
-node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeWrapper.js(121,38): error TS2339: Property '_wrapperInstance' does not exist on type 'typeof DeviceModeView'.
-node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeWrapper.js(128,43): error TS2339: Property '_wrapperInstance' does not exist on type 'typeof DeviceModeView'.
-node_modules/chrome-devtools-frontend/front_end/emulation/DeviceModeWrapper.js(131,36): error TS2339: Property '_wrapperInstance' does not exist on type 'typeof DeviceModeView'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DevicesSettingsTab.js(15,31): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DevicesSettingsTab.js(16,46): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/emulation/DevicesSettingsTab.js(17,42): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DevicesSettingsTab.js(22,29): error TS2555: Expected at least 2 arguments, but got 1.
+node_modules/chrome-devtools-frontend/front_end/emulation/DevicesSettingsTab.js(25,36): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; renderItem(item: T, editable: boolean): Element; removeItemRequested(item: T,...'.
+  Type 'DevicesSettingsTab' is not assignable to type '{ [x: string]: any; renderItem(item: T, editable: boolean): Element; removeItemRequested(item: T,...'.
+    Property 'containerElement' does not exist on type '{ [x: string]: any; renderItem(item: T, editable: boolean): Element; removeItemRequested(item: T,...'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DevicesSettingsTab.js(105,28): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DevicesSettingsTab.js(109,13): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/emulation/DevicesSettingsTab.js(122,13): error TS2339: Property 'consume' does not exist on type 'Event'.
@@ -6389,19 +6245,17 @@ node_modules/chrome-devtools-frontend/front_end/emulation/DevicesSettingsTab.js(
 node_modules/chrome-devtools-frontend/front_end/emulation/DevicesSettingsTab.js(207,61): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/emulation/DevicesSettingsTab.js(208,51): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/emulation/DevicesSettingsTab.js(212,61): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/emulation/EmulatedDevices.js(13,42): error TS2694: Namespace 'EmulatedDevice' has no exported member 'Orientation'.
-node_modules/chrome-devtools-frontend/front_end/emulation/EmulatedDevices.js(15,42): error TS2694: Namespace 'EmulatedDevice' has no exported member 'Orientation'.
-node_modules/chrome-devtools-frontend/front_end/emulation/EmulatedDevices.js(23,50): error TS2694: Namespace 'EmulatedDevice' has no exported member 'Mode'.
-node_modules/chrome-devtools-frontend/front_end/emulation/EmulatedDevices.js(84,45): error TS2694: Namespace 'EmulatedDevice' has no exported member 'Orientation'.
-node_modules/chrome-devtools-frontend/front_end/emulation/EmulatedDevices.js(106,53): error TS2694: Namespace 'EmulatedDevice' has no exported member 'Orientation'.
-node_modules/chrome-devtools-frontend/front_end/emulation/EmulatedDevices.js(195,49): error TS2694: Namespace 'EmulatedDevice' has no exported member 'Mode'.
-node_modules/chrome-devtools-frontend/front_end/emulation/EmulatedDevices.js(243,40): error TS2694: Namespace 'EmulatedDevice' has no exported member 'Orientation'.
-node_modules/chrome-devtools-frontend/front_end/emulation/EmulatedDevices.js(263,40): error TS2694: Namespace 'EmulatedDevice' has no exported member 'Mode'.
-node_modules/chrome-devtools-frontend/front_end/emulation/EmulatedDevices.js(275,40): error TS2694: Namespace 'EmulatedDevice' has no exported member 'Mode'.
-node_modules/chrome-devtools-frontend/front_end/emulation/EmulatedDevices.js(289,41): error TS2694: Namespace 'EmulatedDevice' has no exported member 'Orientation'.
-node_modules/chrome-devtools-frontend/front_end/emulation/EmulatedDevices.js(333,90): error TS1003: Identifier expected.
+node_modules/chrome-devtools-frontend/front_end/emulation/EmulatedDevices.js(13,42): error TS2694: Namespace 'Emulation.EmulatedDevice' has no exported member 'Orientation'.
+node_modules/chrome-devtools-frontend/front_end/emulation/EmulatedDevices.js(15,42): error TS2694: Namespace 'Emulation.EmulatedDevice' has no exported member 'Orientation'.
+node_modules/chrome-devtools-frontend/front_end/emulation/EmulatedDevices.js(23,50): error TS2694: Namespace 'Emulation.EmulatedDevice' has no exported member 'Mode'.
+node_modules/chrome-devtools-frontend/front_end/emulation/EmulatedDevices.js(84,45): error TS2694: Namespace 'Emulation.EmulatedDevice' has no exported member 'Orientation'.
+node_modules/chrome-devtools-frontend/front_end/emulation/EmulatedDevices.js(106,53): error TS2694: Namespace 'Emulation.EmulatedDevice' has no exported member 'Orientation'.
+node_modules/chrome-devtools-frontend/front_end/emulation/EmulatedDevices.js(195,49): error TS2694: Namespace 'Emulation.EmulatedDevice' has no exported member 'Mode'.
+node_modules/chrome-devtools-frontend/front_end/emulation/EmulatedDevices.js(243,40): error TS2694: Namespace 'Emulation.EmulatedDevice' has no exported member 'Orientation'.
+node_modules/chrome-devtools-frontend/front_end/emulation/EmulatedDevices.js(263,40): error TS2694: Namespace 'Emulation.EmulatedDevice' has no exported member 'Mode'.
+node_modules/chrome-devtools-frontend/front_end/emulation/EmulatedDevices.js(275,40): error TS2694: Namespace 'Emulation.EmulatedDevice' has no exported member 'Mode'.
+node_modules/chrome-devtools-frontend/front_end/emulation/EmulatedDevices.js(289,41): error TS2694: Namespace 'Emulation.EmulatedDevice' has no exported member 'Orientation'.
 node_modules/chrome-devtools-frontend/front_end/emulation/EmulatedDevices.js(334,26): error TS2339: Property 'Mode' does not exist on type 'typeof EmulatedDevice'.
-node_modules/chrome-devtools-frontend/front_end/emulation/EmulatedDevices.js(336,99): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/emulation/EmulatedDevices.js(337,26): error TS2339: Property 'Orientation' does not exist on type 'typeof EmulatedDevice'.
 node_modules/chrome-devtools-frontend/front_end/emulation/EmulatedDevices.js(395,27): error TS2339: Property 'runtime' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/emulation/EmulatedDevices.js(470,18): error TS2339: Property 'remove' does not exist on type 'EmulatedDevice[]'.
@@ -6436,7 +6290,7 @@ node_modules/chrome-devtools-frontend/front_end/emulation/MediaQueryInspector.js
 node_modules/chrome-devtools-frontend/front_end/emulation/MediaQueryInspector.js(398,31): error TS2363: The right-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type.
 node_modules/chrome-devtools-frontend/front_end/emulation/MediaQueryInspector.js(413,9): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; Max: number; MinMax: number; Min: number; }' and 'number'.
 node_modules/chrome-devtools-frontend/front_end/emulation/MediaQueryInspector.js(415,9): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; Max: number; MinMax: number; Min: number; }' and 'number'.
-node_modules/chrome-devtools-frontend/front_end/emulation/MediaQueryInspector.js(422,46): error TS2694: Namespace 'MediaQueryInspector' has no exported member 'Section'.
+node_modules/chrome-devtools-frontend/front_end/emulation/MediaQueryInspector.js(422,46): error TS2694: Namespace 'Emulation.MediaQueryInspector' has no exported member 'Section'.
 node_modules/chrome-devtools-frontend/front_end/emulation/MediaQueryInspector.js(425,5): error TS2322: Type 'number' is not assignable to type '{ [x: string]: any; Max: number; MinMax: number; Min: number; }'.
 node_modules/chrome-devtools-frontend/front_end/emulation/SensorsView.js(18,25): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/emulation/SensorsView.js(25,25): error TS2339: Property 'createChild' does not exist on type 'Element'.
@@ -6472,7 +6326,7 @@ node_modules/chrome-devtools-frontend/front_end/emulation/SensorsView.js(250,64)
 node_modules/chrome-devtools-frontend/front_end/emulation/SensorsView.js(250,97): error TS2339: Property 'value' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/emulation/SensorsView.js(251,9): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; UserInput: string; UserDrag: string; ResetButton: string; SelectPreset: strin...'.
 node_modules/chrome-devtools-frontend/front_end/emulation/SensorsView.js(258,9): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; UserInput: string; UserDrag: string; ResetButton: string; SelectPreset: strin...'.
-node_modules/chrome-devtools-frontend/front_end/emulation/SensorsView.js(264,37): error TS2694: Namespace 'SensorsView' has no exported member 'DeviceOrientationModificationSource'.
+node_modules/chrome-devtools-frontend/front_end/emulation/SensorsView.js(264,37): error TS2694: Namespace 'Emulation.SensorsView' has no exported member 'DeviceOrientationModificationSource'.
 node_modules/chrome-devtools-frontend/front_end/emulation/SensorsView.js(278,9): error TS2365: Operator '!==' cannot be applied to types '{ [x: string]: any; UserInput: string; UserDrag: string; ResetButton: string; SelectPreset: strin...' and 'string'.
 node_modules/chrome-devtools-frontend/front_end/emulation/SensorsView.js(279,25): error TS2345: Argument of type 'number' is not assignable to parameter of type 'string'.
 node_modules/chrome-devtools-frontend/front_end/emulation/SensorsView.js(280,24): error TS2345: Argument of type 'number' is not assignable to parameter of type 'string'.
@@ -6509,15 +6363,14 @@ node_modules/chrome-devtools-frontend/front_end/emulation/SensorsView.js(495,13)
 node_modules/chrome-devtools-frontend/front_end/emulation/SensorsView.js(496,13): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/emulation/SensorsView.js(497,13): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/emulation/SensorsView.js(498,13): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/event_listeners/EventListenersUtils.js(4,95): error TS1003: Identifier expected.
-node_modules/chrome-devtools-frontend/front_end/event_listeners/EventListenersUtils.js(5,16): error TS2339: Property 'FrameworkEventListenersObject' does not exist on type 'typeof EventListeners'.
-node_modules/chrome-devtools-frontend/front_end/event_listeners/EventListenersUtils.js(7,106): error TS1003: Identifier expected.
-node_modules/chrome-devtools-frontend/front_end/event_listeners/EventListenersUtils.js(8,16): error TS2339: Property 'EventListenerObjectInInspectedPage' does not exist on type 'typeof EventListeners'.
 node_modules/chrome-devtools-frontend/front_end/event_listeners/EventListenersUtils.js(12,38): error TS2694: Namespace 'EventListeners' has no exported member 'FrameworkEventListenersObject'.
 node_modules/chrome-devtools-frontend/front_end/event_listeners/EventListenersUtils.js(19,36): error TS2694: Namespace 'EventListeners' has no exported member 'FrameworkEventListenersObject'.
 node_modules/chrome-devtools-frontend/front_end/event_listeners/EventListenersUtils.js(22,52): error TS2694: Namespace 'EventListeners' has no exported member 'FrameworkEventListenersObject'.
 node_modules/chrome-devtools-frontend/front_end/event_listeners/EventListenersUtils.js(28,8): error TS2339: Property 'catchException' does not exist on type 'Promise<any>'.
-node_modules/chrome-devtools-frontend/front_end/event_listeners/EventListenersUtils.js(144,37): error TS2694: Namespace 'DebuggerModel' has no exported member 'FunctionDetails'.
+node_modules/chrome-devtools-frontend/front_end/event_listeners/EventListenersUtils.js(92,32): error TS2694: Namespace 'EventListeners' has no exported member 'EventListenerObjectInInspectedPage'.
+node_modules/chrome-devtools-frontend/front_end/event_listeners/EventListenersUtils.js(118,32): error TS2694: Namespace 'EventListeners' has no exported member 'EventListenerObjectInInspectedPage'.
+node_modules/chrome-devtools-frontend/front_end/event_listeners/EventListenersUtils.js(144,37): error TS2694: Namespace 'SDK.DebuggerModel' has no exported member 'FunctionDetails'.
+node_modules/chrome-devtools-frontend/front_end/event_listeners/EventListenersUtils.js(157,32): error TS2694: Namespace 'EventListeners' has no exported member 'EventListenerObjectInInspectedPage'.
 node_modules/chrome-devtools-frontend/front_end/event_listeners/EventListenersUtils.js(172,62): error TS2339: Property 'catchException' does not exist on type 'Promise<EventListener>'.
 node_modules/chrome-devtools-frontend/front_end/event_listeners/EventListenersUtils.js(182,62): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Raw: string; Framework: string; FrameworkUser: string; }'.
 node_modules/chrome-devtools-frontend/front_end/event_listeners/EventListenersUtils.js(227,31): error TS2694: Namespace 'EventListeners' has no exported member 'FrameworkEventListenersObject'.
@@ -6536,8 +6389,6 @@ node_modules/chrome-devtools-frontend/front_end/event_listeners/EventListenersUt
   Type '{ fn: any; data: any; _data: any; }' provides no match for the signature '(arg0: Node): any'.
 node_modules/chrome-devtools-frontend/front_end/event_listeners/EventListenersUtils.js(480,32): error TS2352: Type '{ fn: any; data: any; _data: any; }' cannot be converted to type '(arg0: Node) => any'.
   Type '{ fn: any; data: any; _data: any; }' provides no match for the signature '(arg0: Node): any'.
-node_modules/chrome-devtools-frontend/front_end/event_listeners/EventListenersView.js(6,2): error TS1003: Identifier expected.
-node_modules/chrome-devtools-frontend/front_end/event_listeners/EventListenersView.js(7,16): error TS2551: Property 'EventListenersResult' does not exist on type 'typeof EventListeners'. Did you mean 'EventListenersView'?
 node_modules/chrome-devtools-frontend/front_end/event_listeners/EventListenersView.js(27,37): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/event_listeners/EventListenersView.js(35,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 node_modules/chrome-devtools-frontend/front_end/event_listeners/EventListenersView.js(51,32): error TS2694: Namespace 'EventListeners' has no exported member 'FrameworkEventListenersObject'.
@@ -6558,6 +6409,7 @@ node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionAPI.js(130,2
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionAPI.js(132,23): error TS2339: Property 'registerHandler' does not exist on type 'ExtensionServerClient'.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionAPI.js(145,25): error TS2339: Property 'sendRequest' does not exist on type 'ExtensionServerClient'.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionAPI.js(149,19): error TS1110: Type expected.
+node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionAPI.js(186,12): error TS2339: Property '_fire' does not exist on type 'EventSinkImpl'.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionAPI.js(203,23): error TS2339: Property 'sendRequest' does not exist on type 'ExtensionServerClient'.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionAPI.js(207,23): error TS2339: Property 'sendRequest' does not exist on type 'ExtensionServerClient'.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionAPI.js(224,23): error TS2339: Property 'sendRequest' does not exist on type 'ExtensionServerClient'.
@@ -6569,6 +6421,8 @@ node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionAPI.js(268,2
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionAPI.js(270,25): error TS2339: Property 'registerHandler' does not exist on type 'ExtensionServerClient'.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionAPI.js(274,25): error TS2339: Property 'sendRequest' does not exist on type 'ExtensionServerClient'.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionAPI.js(278,23): error TS2339: Property 'sendRequest' does not exist on type 'ExtensionServerClient'.
+node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionAPI.js(298,14): error TS2339: Property '_fire' does not exist on type 'EventSinkImpl'.
+node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionAPI.js(300,14): error TS2339: Property '_fire' does not exist on type 'EventSinkImpl'.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionAPI.js(314,12): error TS8022: JSDoc '@extends' is not attached to a class.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionAPI.js(322,55): error TS2339: Property 'nextObjectId' does not exist on type 'ExtensionServerClient'.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionAPI.js(327,23): error TS2339: Property 'sendRequest' does not exist on type 'ExtensionServerClient'.
@@ -6587,6 +6441,9 @@ node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionAPI.js(475,2
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionAPI.js(492,62): error TS2339: Property 'nextObjectId' does not exist on type 'ExtensionServerClient'.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionAPI.js(493,23): error TS2339: Property 'sendRequest' does not exist on type 'ExtensionServerClient'.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionAPI.js(515,23): error TS2339: Property 'sendRequest' does not exist on type 'ExtensionServerClient'.
+node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionAPI.js(529,12): error TS2339: Property '_fire' does not exist on type 'EventSinkImpl'.
+node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionAPI.js(544,12): error TS2339: Property '_fire' does not exist on type 'EventSinkImpl'.
+node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionAPI.js(551,12): error TS2339: Property '_fire' does not exist on type 'EventSinkImpl'.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionAPI.js(569,23): error TS2339: Property 'sendRequest' does not exist on type 'ExtensionServerClient'.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionAPI.js(586,23): error TS2339: Property 'sendRequest' does not exist on type 'ExtensionServerClient'.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionAPI.js(597,23): error TS2339: Property 'sendRequest' does not exist on type 'ExtensionServerClient'.
@@ -6595,52 +6452,64 @@ node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionAPI.js(627,2
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionAPI.js(662,21): error TS2339: Property 'sendRequest' does not exist on type 'ExtensionServerClient'.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionAPI.js(789,21): error TS2339: Property 'exposeWebInspectorNamespace' does not exist on type 'ExtensionDescriptor'.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionAPI.js(790,12): error TS2339: Property 'webInspector' does not exist on type 'Window'.
+node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionPanel.js(48,50): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; searchCanceled(): void; performSearch(searchConfig: SearchConfig, shouldJump:...'.
+  Type 'ExtensionPanel' is not assignable to type '{ [x: string]: any; searchCanceled(): void; performSearch(searchConfig: SearchConfig, shouldJump:...'.
+    Property '_server' does not exist on type '{ [x: string]: any; searchCanceled(): void; performSearch(searchConfig: SearchConfig, shouldJump:...'.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionPanel.js(232,23): error TS2339: Property 'style' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionPanel.js(240,18): error TS2339: Property 'style' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionPanel.js(246,24): error TS2694: Namespace 'Protocol' has no exported member 'Error'.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionPanel.js(279,40): error TS2339: Property 'removeChildren' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionRegistryStub.js(30,13): error TS2339: Property 'InspectorExtensionRegistry' does not exist on type 'Window'.
-node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionRegistryStub.js(34,14): error TS2339: Property 'InspectorExtensionRegistryStub' does not exist on type 'typeof Extensions'.
-node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionRegistryStub.js(39,51): error TS2339: Property 'InspectorExtensionRegistryStub' does not exist on type 'typeof Extensions'.
+node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionServer.js(85,27): error TS2551: Property 'events' does not exist on type 'typeof InspectorFrontendHostAPI'. Did you mean 'Events'?
+node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionServer.js(87,27): error TS2551: Property 'events' does not exist on type 'typeof InspectorFrontendHostAPI'. Did you mean 'Events'?
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionServer.js(129,5): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionServer.js(136,5): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionServer.js(161,5): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionServer.js(219,43): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionServer.js(244,54): error TS2339: Property 'traverseNextNode' does not exist on type 'HTMLElement'.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionServer.js(245,27): error TS2693: 'ShadowRoot' only refers to a type, but is being used as a value here.
+node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionServer.js(263,31): error TS2345: Argument of type 'ExtensionServerPanelView' is not assignable to parameter of type '{ [x: string]: any; viewId(): string; title(): string; isCloseable(): boolean; isTransient(): boo...'.
+  Property '_name' does not exist on type '{ [x: string]: any; viewId(): string; title(): string; isCloseable(): boolean; isTransient(): boo...'.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionServer.js(290,77): error TS2345: Argument of type 'ToolbarButton' is not assignable to parameter of type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
   Type 'ToolbarButton' is not assignable to type '{ [x: string]: any; item(): any & any; }'.
     Property 'item' is missing in type 'ToolbarButton'.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionServer.js(416,26): error TS2694: Namespace 'Protocol' has no exported member 'Error'.
+node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionServer.js(463,53): error TS2345: Argument of type '{ [x: string]: any; url: string; type: string; }' is not assignable to parameter of type '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
+  Property 'contentURL' is missing in type '{ [x: string]: any; url: string; type: string; }'.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionServer.js(471,22): error TS2339: Property 'valuesArray' does not exist on type 'Map<string, { [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded...'.
+node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionServer.js(497,30): error TS2345: Argument of type 'UISourceCode | Resource' is not assignable to parameter of type '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
+  Type 'UISourceCode' is not assignable to type '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
+    Property '_project' does not exist on type '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionServer.js(502,26): error TS2694: Namespace 'Protocol' has no exported member 'Error'.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionServer.js(542,14): error TS2339: Property '_extensionOrigin' does not exist on type 'MessagePort'.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionServer.js(567,30): error TS2339: Property 'KeyboardEvent' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionServer.js(599,76): error TS2345: Argument of type 'symbol' is not assignable to parameter of type 'string'.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionServer.js(603,9): error TS2345: Argument of type 'symbol' is not assignable to parameter of type 'string'.
+node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionServer.js(631,93): error TS2345: Argument of type 'UISourceCode' is not assignable to parameter of type '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
+  Property '_project' does not exist on type '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
+node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionServer.js(638,85): error TS2345: Argument of type 'UISourceCode' is not assignable to parameter of type '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionServer.js(649,5): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionServer.js(667,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionServer.js(670,36): error TS2339: Property '_overridePlatformExtensionAPIForTest' does not exist on type 'typeof extensionServer'.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionServer.js(671,14): error TS2339: Property 'buildPlatformExtensionAPI' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionServer.js(671,69): error TS2339: Property '_overridePlatformExtensionAPIForTest' does not exist on type 'typeof extensionServer'.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionServer.js(681,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionServer.js(708,31): error TS2339: Property 'setInjectedScriptForOrigin' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionServer.js(708,31): error TS2339: Property 'setInjectedScriptForOrigin' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionServer.js(712,14): error TS2339: Property 'src' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionServer.js(713,14): error TS2339: Property 'style' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionServer.js(765,31): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionServer.js(777,31): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionServer.js(839,43): error TS2694: Namespace 'ExtensionStatus' has no exported member 'Record'.
-node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionServer.js(918,34): error TS2694: Namespace 'RuntimeModel' has no exported member 'EvaluationResult'.
-node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionServer.js(976,45): error TS2694: Namespace 'ExtensionStatus' has no exported member 'Record'.
+node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionServer.js(839,43): error TS2694: Namespace 'Extensions.ExtensionStatus' has no exported member 'Record'.
+node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionServer.js(918,34): error TS2694: Namespace 'SDK.RuntimeModel' has no exported member 'EvaluationResult'.
+node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionServer.js(976,45): error TS2694: Namespace 'Extensions.ExtensionStatus' has no exported member 'Record'.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionServer.js(983,59): error TS2339: Property 'vsprintf' does not exist on type 'StringConstructor'.
-node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionServer.js(1001,2): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionServer.js(1002,28): error TS2300: Duplicate identifier 'Record'.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionServer.js(1002,28): error TS2339: Property 'Record' does not exist on type 'typeof ExtensionStatus'.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionTraceProvider.js(27,32): error TS2339: Property 'startTraceRecording' does not exist on type 'typeof extensionServer'.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionTraceProvider.js(31,32): error TS2339: Property 'stopTraceRecording' does not exist on type 'typeof extensionServer'.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionView.js(50,18): error TS2339: Property 'src' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionView.js(74,22): error TS2352: Type 'Window' cannot be converted to type 'Window[]'.
-  Property 'flatMap' is missing in type 'Window'.
+  Property 'push' is missing in type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/extensions/ExtensionView.js(75,74): error TS2339: Property 'contentWindow' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/extensions_test_runner/ExtensionsNetworkTestRunner.js(23,5): error TS2304: Cannot find name 'output'.
 node_modules/chrome-devtools-frontend/front_end/extensions_test_runner/ExtensionsNetworkTestRunner.js(27,3): error TS2304: Cannot find name 'webInspector'.
@@ -6649,10 +6518,6 @@ node_modules/chrome-devtools-frontend/front_end/extensions_test_runner/Extension
 node_modules/chrome-devtools-frontend/front_end/extensions_test_runner/ExtensionsTestRunner.js(16,10): error TS2339: Property '_extensionServerForTests' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/extensions_test_runner/ExtensionsTestRunner.js(21,30): error TS2339: Property '_dispatchCallback' does not exist on type 'typeof extensionServer'.
 node_modules/chrome-devtools-frontend/front_end/extensions_test_runner/ExtensionsTestRunner.js(28,32): error TS2339: Property '_dispatchCallback' does not exist on type 'typeof extensionServer'.
-node_modules/chrome-devtools-frontend/front_end/extensions_test_runner/ExtensionsTestRunner.js(46,24): error TS2339: Property '_codeToEvaluateBeforeTests' does not exist on type 'typeof ExtensionsTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/extensions_test_runner/ExtensionsTestRunner.js(50,33): error TS2339: Property 'RuntimeAgent' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/extensions_test_runner/ExtensionsTestRunner.js(55,24): error TS2339: Property '_pendingTests' does not exist on type 'typeof ExtensionsTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/extensions_test_runner/ExtensionsTestRunner.js(55,62): error TS2339: Property '_codeToEvaluateBeforeTests' does not exist on type 'typeof ExtensionsTestRunner'.
 node_modules/chrome-devtools-frontend/front_end/extensions_test_runner/ExtensionsTestRunner.js(60,3): error TS2304: Cannot find name 'InspectorFrontendAPI'.
 node_modules/chrome-devtools-frontend/front_end/extensions_test_runner/ExtensionsTestRunner.js(63,30): error TS2339: Property 'initializeExtensions' does not exist on type 'typeof extensionServer'.
 node_modules/chrome-devtools-frontend/front_end/externs.js(37,8): error TS2339: Property 'observe' does not exist on type 'ObjectConstructor'.
@@ -6696,7 +6561,6 @@ node_modules/chrome-devtools-frontend/front_end/externs.js(196,22): error TS2339
 node_modules/chrome-devtools-frontend/front_end/externs.js(206,11): error TS2304: Cannot find name 'DirectoryEntry'.
 node_modules/chrome-devtools-frontend/front_end/externs.js(213,8): error TS2339: Property 'domAutomationController' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/externs.js(219,47): error TS2694: Namespace 'DevToolsHost' has no exported member 'ContextMenuDescriptor'.
-node_modules/chrome-devtools-frontend/front_end/externs.js(219,83): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/externs.js(220,14): error TS2300: Duplicate identifier 'ContextMenuDescriptor'.
 node_modules/chrome-devtools-frontend/front_end/externs.js(220,14): error TS2339: Property 'ContextMenuDescriptor' does not exist on type '{ (): void; zoomFactor(): number; copyText(text: string): void; platform(): string; showContextMe...'.
 node_modules/chrome-devtools-frontend/front_end/externs.js(223,13): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
@@ -6708,81 +6572,61 @@ node_modules/chrome-devtools-frontend/front_end/externs.js(261,13): error TS2355
 node_modules/chrome-devtools-frontend/front_end/externs.js(266,13): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 node_modules/chrome-devtools-frontend/front_end/externs.js(271,13): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 node_modules/chrome-devtools-frontend/front_end/externs.js(278,13): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
-node_modules/chrome-devtools-frontend/front_end/externs.js(326,75): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/externs.js(328,175): error TS2694: Namespace 'Adb' has no exported member 'Page'.
-node_modules/chrome-devtools-frontend/front_end/externs.js(328,183): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/externs.js(330,88): error TS2694: Namespace 'Adb' has no exported member 'Browser'.
-node_modules/chrome-devtools-frontend/front_end/externs.js(330,154): error TS1003: Identifier expected.
-node_modules/chrome-devtools-frontend/front_end/externs.js(332,41): error TS1003: Identifier expected.
-node_modules/chrome-devtools-frontend/front_end/externs.js(334,49): error TS1003: Identifier expected.
-node_modules/chrome-devtools-frontend/front_end/externs.js(336,68): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/externs.js(338,36): error TS2694: Namespace 'Adb' has no exported member 'DevicePortForwardingStatus'.
-node_modules/chrome-devtools-frontend/front_end/externs.js(338,65): error TS1003: Identifier expected.
-node_modules/chrome-devtools-frontend/front_end/externs.js(340,31): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/externs.js(344,2): error TS1131: Property or signature expected.
 node_modules/chrome-devtools-frontend/front_end/externs.js(366,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 node_modules/chrome-devtools-frontend/front_end/externs.js(395,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 node_modules/chrome-devtools-frontend/front_end/externs.js(443,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 node_modules/chrome-devtools-frontend/front_end/externs.js(448,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 node_modules/chrome-devtools-frontend/front_end/externs.js(455,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
-node_modules/chrome-devtools-frontend/front_end/externs.js(549,130): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/externs.js(550,12): error TS2339: Property 'BeforeChangeObject' does not exist on type 'typeof CodeMirror'.
-node_modules/chrome-devtools-frontend/front_end/externs.js(552,126): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/externs.js(553,12): error TS2339: Property 'ChangeObject' does not exist on type 'typeof CodeMirror'.
 node_modules/chrome-devtools-frontend/front_end/externs.js(565,13): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 node_modules/chrome-devtools-frontend/front_end/externs.js(571,8): error TS2551: Property 'pos' does not exist on type 'typeof CodeMirror'. Did you mean 'Pos'?
 node_modules/chrome-devtools-frontend/front_end/externs.js(572,8): error TS2339: Property 'start' does not exist on type 'typeof CodeMirror'.
 node_modules/chrome-devtools-frontend/front_end/externs.js(623,8): error TS2339: Property 'dispatchStandaloneTestRunnerMessages' does not exist on type 'Window'.
-node_modules/chrome-devtools-frontend/front_end/externs.js(630,19): error TS2339: Property 'animate' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/externs.js(654,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 node_modules/chrome-devtools-frontend/front_end/externs.js(661,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 node_modules/chrome-devtools-frontend/front_end/externs.js(668,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
-node_modules/chrome-devtools-frontend/front_end/externs.js(705,2): error TS1003: Identifier expected.
-node_modules/chrome-devtools-frontend/front_end/externs.js(710,2): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/externs.js(711,7): error TS2300: Duplicate identifier 'Comment'.
 node_modules/chrome-devtools-frontend/front_end/externs.js(714,22): error TS2694: Namespace 'Acorn' has no exported member 'Token'.
 node_modules/chrome-devtools-frontend/front_end/externs.js(714,35): error TS2694: Namespace 'Acorn' has no exported member 'Comment'.
-node_modules/chrome-devtools-frontend/front_end/externs.js(715,2): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/externs.js(770,1): error TS8022: JSDoc '@extends' is not attached to a class.
 node_modules/chrome-devtools-frontend/front_end/externs.js(803,13): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 node_modules/chrome-devtools-frontend/front_end/externs.js(805,19): error TS2339: Property 'context' does not exist on type 'Console'.
 node_modules/chrome-devtools-frontend/front_end/externs.js(811,13): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 node_modules/chrome-devtools-frontend/front_end/formatter/FormatterWorkerPool.js(28,40): error TS2339: Property 'keysArray' does not exist on type 'Map<Worker, Task>'.
-node_modules/chrome-devtools-frontend/front_end/formatter/FormatterWorkerPool.js(162,70): error TS2694: Namespace 'FormatterWorkerPool' has no exported member 'CSSRule'.
-node_modules/chrome-devtools-frontend/front_end/formatter/FormatterWorkerPool.js(172,68): error TS2694: Namespace 'FormatterWorkerPool' has no exported member 'CSSRule'.
-node_modules/chrome-devtools-frontend/front_end/formatter/FormatterWorkerPool.js(197,70): error TS2694: Namespace 'FormatterWorkerPool' has no exported member 'OutlineItem'.
-node_modules/chrome-devtools-frontend/front_end/formatter/FormatterWorkerPool.js(224,54): error TS2694: Namespace 'FormatterWorkerPool' has no exported member 'CSSRule'.
-node_modules/chrome-devtools-frontend/front_end/formatter/FormatterWorkerPool.js(259,47): error TS2694: Namespace 'FormatterWorkerPool' has no exported member 'FormatMapping'.
-node_modules/chrome-devtools-frontend/front_end/formatter/FormatterWorkerPool.js(264,70): error TS1003: Identifier expected.
+node_modules/chrome-devtools-frontend/front_end/formatter/FormatterWorkerPool.js(162,70): error TS2694: Namespace 'Formatter.FormatterWorkerPool' has no exported member 'CSSRule'.
+node_modules/chrome-devtools-frontend/front_end/formatter/FormatterWorkerPool.js(172,68): error TS2694: Namespace 'Formatter.FormatterWorkerPool' has no exported member 'CSSRule'.
+node_modules/chrome-devtools-frontend/front_end/formatter/FormatterWorkerPool.js(197,70): error TS2694: Namespace 'Formatter.FormatterWorkerPool' has no exported member 'OutlineItem'.
+node_modules/chrome-devtools-frontend/front_end/formatter/FormatterWorkerPool.js(224,54): error TS2694: Namespace 'Formatter.FormatterWorkerPool' has no exported member 'CSSRule'.
+node_modules/chrome-devtools-frontend/front_end/formatter/FormatterWorkerPool.js(259,47): error TS2694: Namespace 'Formatter.FormatterWorkerPool' has no exported member 'FormatMapping'.
 node_modules/chrome-devtools-frontend/front_end/formatter/FormatterWorkerPool.js(265,31): error TS2339: Property 'FormatMapping' does not exist on type 'typeof FormatterWorkerPool'.
-node_modules/chrome-devtools-frontend/front_end/formatter/FormatterWorkerPool.js(267,93): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/formatter/FormatterWorkerPool.js(268,31): error TS2551: Property 'OutlineItem' does not exist on type 'typeof FormatterWorkerPool'. Did you mean 'JSOutlineItem'?
-node_modules/chrome-devtools-frontend/front_end/formatter/FormatterWorkerPool.js(285,2): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/formatter/FormatterWorkerPool.js(286,31): error TS2339: Property 'TextRange' does not exist on type 'typeof FormatterWorkerPool'.
-node_modules/chrome-devtools-frontend/front_end/formatter/FormatterWorkerPool.js(292,47): error TS2694: Namespace 'FormatterWorkerPool' has no exported member 'TextRange'.
-node_modules/chrome-devtools-frontend/front_end/formatter/FormatterWorkerPool.js(296,47): error TS2694: Namespace 'FormatterWorkerPool' has no exported member 'TextRange'.
-node_modules/chrome-devtools-frontend/front_end/formatter/FormatterWorkerPool.js(298,47): error TS2694: Namespace 'FormatterWorkerPool' has no exported member 'TextRange'.
-node_modules/chrome-devtools-frontend/front_end/formatter/FormatterWorkerPool.js(309,47): error TS2694: Namespace 'FormatterWorkerPool' has no exported member 'TextRange'.
-node_modules/chrome-devtools-frontend/front_end/formatter/FormatterWorkerPool.js(322,2): error TS1003: Identifier expected.
+node_modules/chrome-devtools-frontend/front_end/formatter/FormatterWorkerPool.js(292,47): error TS2694: Namespace 'Formatter.FormatterWorkerPool' has no exported member 'TextRange'.
+node_modules/chrome-devtools-frontend/front_end/formatter/FormatterWorkerPool.js(296,47): error TS2694: Namespace 'Formatter.FormatterWorkerPool' has no exported member 'TextRange'.
+node_modules/chrome-devtools-frontend/front_end/formatter/FormatterWorkerPool.js(298,47): error TS2694: Namespace 'Formatter.FormatterWorkerPool' has no exported member 'TextRange'.
+node_modules/chrome-devtools-frontend/front_end/formatter/FormatterWorkerPool.js(309,47): error TS2694: Namespace 'Formatter.FormatterWorkerPool' has no exported member 'TextRange'.
 node_modules/chrome-devtools-frontend/front_end/formatter/FormatterWorkerPool.js(323,31): error TS2551: Property 'CSSAtRule' does not exist on type 'typeof FormatterWorkerPool'. Did you mean 'SCSSRule'?
-node_modules/chrome-devtools-frontend/front_end/formatter/FormatterWorkerPool.js(326,88): error TS2694: Namespace 'FormatterWorkerPool' has no exported member 'CSSAtRule'.
-node_modules/chrome-devtools-frontend/front_end/formatter/FormatterWorkerPool.js(327,2): error TS1003: Identifier expected.
+node_modules/chrome-devtools-frontend/front_end/formatter/FormatterWorkerPool.js(326,88): error TS2694: Namespace 'Formatter.FormatterWorkerPool' has no exported member 'CSSAtRule'.
 node_modules/chrome-devtools-frontend/front_end/formatter/FormatterWorkerPool.js(328,31): error TS2300: Duplicate identifier 'CSSRule'.
 node_modules/chrome-devtools-frontend/front_end/formatter/FormatterWorkerPool.js(328,31): error TS2551: Property 'CSSRule' does not exist on type 'typeof FormatterWorkerPool'. Did you mean 'SCSSRule'?
-node_modules/chrome-devtools-frontend/front_end/formatter/FormatterWorkerPool.js(332,47): error TS2694: Namespace 'FormatterWorkerPool' has no exported member 'TextRange'.
-node_modules/chrome-devtools-frontend/front_end/formatter/FormatterWorkerPool.js(334,47): error TS2694: Namespace 'FormatterWorkerPool' has no exported member 'TextRange'.
-node_modules/chrome-devtools-frontend/front_end/formatter/FormatterWorkerPool.js(336,47): error TS2694: Namespace 'FormatterWorkerPool' has no exported member 'TextRange'.
-node_modules/chrome-devtools-frontend/front_end/formatter/FormatterWorkerPool.js(345,54): error TS2694: Namespace 'FormatterWorkerPool' has no exported member 'TextRange'.
-node_modules/chrome-devtools-frontend/front_end/formatter/FormatterWorkerPool.js(349,47): error TS2694: Namespace 'FormatterWorkerPool' has no exported member 'TextRange'.
-node_modules/chrome-devtools-frontend/front_end/formatter/FormatterWorkerPool.js(358,18): error TS2551: Property '_formatterWorkerPool' does not exist on type 'typeof Formatter'. Did you mean 'FormatterWorkerPool'?
-node_modules/chrome-devtools-frontend/front_end/formatter/FormatterWorkerPool.js(359,15): error TS2551: Property '_formatterWorkerPool' does not exist on type 'typeof Formatter'. Did you mean 'FormatterWorkerPool'?
-node_modules/chrome-devtools-frontend/front_end/formatter/FormatterWorkerPool.js(360,20): error TS2551: Property '_formatterWorkerPool' does not exist on type 'typeof Formatter'. Did you mean 'FormatterWorkerPool'?
+node_modules/chrome-devtools-frontend/front_end/formatter/FormatterWorkerPool.js(332,47): error TS2694: Namespace 'Formatter.FormatterWorkerPool' has no exported member 'TextRange'.
+node_modules/chrome-devtools-frontend/front_end/formatter/FormatterWorkerPool.js(334,47): error TS2694: Namespace 'Formatter.FormatterWorkerPool' has no exported member 'TextRange'.
+node_modules/chrome-devtools-frontend/front_end/formatter/FormatterWorkerPool.js(336,47): error TS2694: Namespace 'Formatter.FormatterWorkerPool' has no exported member 'TextRange'.
+node_modules/chrome-devtools-frontend/front_end/formatter/FormatterWorkerPool.js(345,54): error TS2694: Namespace 'Formatter.FormatterWorkerPool' has no exported member 'TextRange'.
+node_modules/chrome-devtools-frontend/front_end/formatter/FormatterWorkerPool.js(349,47): error TS2694: Namespace 'Formatter.FormatterWorkerPool' has no exported member 'TextRange'.
 node_modules/chrome-devtools-frontend/front_end/formatter/ScriptFormatter.js(65,32): error TS2339: Property 'upperBound' does not exist on type 'number[]'.
 node_modules/chrome-devtools-frontend/front_end/formatter/ScriptFormatter.js(98,31): error TS2339: Property 'computeLineEndings' does not exist on type 'string'.
 node_modules/chrome-devtools-frontend/front_end/formatter/ScriptFormatter.js(98,74): error TS2339: Property 'computeLineEndings' does not exist on type 'string'.
+node_modules/chrome-devtools-frontend/front_end/formatter/ScriptFormatter.js(99,42): error TS2345: Argument of type 'FormatterSourceMappingImpl' is not assignable to parameter of type '{ [x: string]: any; originalToFormatted(lineNumber: number, columnNumber?: number): number[]; for...'.
+  Property '_originalLineEndings' does not exist on type '{ [x: string]: any; originalToFormatted(lineNumber: number, columnNumber?: number): number[]; for...'.
 node_modules/chrome-devtools-frontend/front_end/formatter/ScriptFormatter.js(127,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 node_modules/chrome-devtools-frontend/front_end/formatter/ScriptFormatter.js(134,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
-node_modules/chrome-devtools-frontend/front_end/formatter/ScriptFormatter.js(173,45): error TS2694: Namespace 'FormatterWorkerPool' has no exported member 'FormatMapping'.
+node_modules/chrome-devtools-frontend/front_end/formatter/ScriptFormatter.js(173,45): error TS2694: Namespace 'Formatter.FormatterWorkerPool' has no exported member 'FormatMapping'.
 node_modules/chrome-devtools-frontend/front_end/formatter/ScriptFormatter.js(215,28): error TS2339: Property 'upperBound' does not exist on type 'number[]'.
 node_modules/chrome-devtools-frontend/front_end/formatter_worker/AcornTokenizer.js(14,54): error TS2345: Argument of type '{ ecmaVersion: number; onComment: any[]; }' is not assignable to parameter of type '{ [x: string]: boolean; }'.
   Property 'ecmaVersion' is incompatible with index signature.
@@ -6798,24 +6642,7 @@ node_modules/chrome-devtools-frontend/front_end/formatter_worker/AcornTokenizer.
 node_modules/chrome-devtools-frontend/front_end/formatter_worker/AcornTokenizer.js(97,22): error TS2694: Namespace 'Acorn' has no exported member 'TokenOrComment'.
 node_modules/chrome-devtools-frontend/front_end/formatter_worker/CSSFormatter.js(56,5): error TS2554: Expected 1 arguments, but got 2.
 node_modules/chrome-devtools-frontend/front_end/formatter_worker/CSSFormatter.js(67,39): error TS2339: Property 'lowerBound' does not exist on type 'number[]'.
-node_modules/chrome-devtools-frontend/front_end/formatter_worker/CSSRuleParser.js(4,17): error TS2339: Property 'CSSParserStates' does not exist on type 'typeof FormatterWorker'.
 node_modules/chrome-devtools-frontend/front_end/formatter_worker/CSSRuleParser.js(17,40): error TS2345: Argument of type '(message: any, targetOrigin: string, transfer?: any[]) => void' is not assignable to parameter of type '(arg0: any) => any'.
-node_modules/chrome-devtools-frontend/front_end/formatter_worker/CSSRuleParser.js(30,31): error TS2339: Property 'CSSParserStates' does not exist on type 'typeof FormatterWorker'.
-node_modules/chrome-devtools-frontend/front_end/formatter_worker/CSSRuleParser.js(49,28): error TS2339: Property 'CSSParserStates' does not exist on type 'typeof FormatterWorker'.
-node_modules/chrome-devtools-frontend/front_end/formatter_worker/CSSRuleParser.js(57,35): error TS2339: Property 'CSSParserStates' does not exist on type 'typeof FormatterWorker'.
-node_modules/chrome-devtools-frontend/front_end/formatter_worker/CSSRuleParser.js(64,35): error TS2339: Property 'CSSParserStates' does not exist on type 'typeof FormatterWorker'.
-node_modules/chrome-devtools-frontend/front_end/formatter_worker/CSSRuleParser.js(67,28): error TS2339: Property 'CSSParserStates' does not exist on type 'typeof FormatterWorker'.
-node_modules/chrome-devtools-frontend/front_end/formatter_worker/CSSRuleParser.js(71,35): error TS2339: Property 'CSSParserStates' does not exist on type 'typeof FormatterWorker'.
-node_modules/chrome-devtools-frontend/front_end/formatter_worker/CSSRuleParser.js(76,28): error TS2339: Property 'CSSParserStates' does not exist on type 'typeof FormatterWorker'.
-node_modules/chrome-devtools-frontend/front_end/formatter_worker/CSSRuleParser.js(80,35): error TS2339: Property 'CSSParserStates' does not exist on type 'typeof FormatterWorker'.
-node_modules/chrome-devtools-frontend/front_end/formatter_worker/CSSRuleParser.js(85,28): error TS2339: Property 'CSSParserStates' does not exist on type 'typeof FormatterWorker'.
-node_modules/chrome-devtools-frontend/front_end/formatter_worker/CSSRuleParser.js(93,35): error TS2339: Property 'CSSParserStates' does not exist on type 'typeof FormatterWorker'.
-node_modules/chrome-devtools-frontend/front_end/formatter_worker/CSSRuleParser.js(98,35): error TS2339: Property 'CSSParserStates' does not exist on type 'typeof FormatterWorker'.
-node_modules/chrome-devtools-frontend/front_end/formatter_worker/CSSRuleParser.js(127,28): error TS2339: Property 'CSSParserStates' does not exist on type 'typeof FormatterWorker'.
-node_modules/chrome-devtools-frontend/front_end/formatter_worker/CSSRuleParser.js(133,35): error TS2339: Property 'CSSParserStates' does not exist on type 'typeof FormatterWorker'.
-node_modules/chrome-devtools-frontend/front_end/formatter_worker/CSSRuleParser.js(138,28): error TS2339: Property 'CSSParserStates' does not exist on type 'typeof FormatterWorker'.
-node_modules/chrome-devtools-frontend/front_end/formatter_worker/CSSRuleParser.js(150,37): error TS2339: Property 'CSSParserStates' does not exist on type 'typeof FormatterWorker'.
-node_modules/chrome-devtools-frontend/front_end/formatter_worker/CSSRuleParser.js(152,37): error TS2339: Property 'CSSParserStates' does not exist on type 'typeof FormatterWorker'.
 node_modules/chrome-devtools-frontend/front_end/formatter_worker/CSSRuleParser.js(172,5): error TS2554: Expected 1 arguments, but got 2.
 node_modules/chrome-devtools-frontend/front_end/formatter_worker/ESTreeWalker.js(45,10): error TS2339: Property 'parent' does not exist on type 'Node'.
 node_modules/chrome-devtools-frontend/front_end/formatter_worker/ESTreeWalker.js(59,33): error TS2352: Type 'Node' cannot be converted to type 'TemplateLiteralNode'.
@@ -6824,6 +6651,8 @@ node_modules/chrome-devtools-frontend/front_end/formatter_worker/ESTreeWalker.js
   Property 'start' is missing in type 'TemplateLiteralNode'.
 node_modules/chrome-devtools-frontend/front_end/formatter_worker/ESTreeWalker.js(63,57): error TS2345: Argument of type 'TemplateLiteralNode' is not assignable to parameter of type 'Node'.
 node_modules/chrome-devtools-frontend/front_end/formatter_worker/ESTreeWalker.js(65,66): error TS2345: Argument of type 'TemplateLiteralNode' is not assignable to parameter of type 'Node'.
+node_modules/chrome-devtools-frontend/front_end/formatter_worker/ESTreeWalker.js(89,53): error TS2300: Duplicate identifier 'SkipSubtree'.
+node_modules/chrome-devtools-frontend/front_end/formatter_worker/ESTreeWalker.js(90,30): error TS2300: Duplicate identifier 'SkipSubtree'.
 node_modules/chrome-devtools-frontend/front_end/formatter_worker/FormattedContentBuilder.js(47,39): error TS2339: Property 'peekLast' does not exist on type 'any[]'.
 node_modules/chrome-devtools-frontend/front_end/formatter_worker/FormatterWorker.js(32,30): error TS1138: Parameter declaration expected.
 node_modules/chrome-devtools-frontend/front_end/formatter_worker/FormatterWorker.js(44,24): error TS2339: Property 'token' does not exist on type 'void'.
@@ -6863,6 +6692,7 @@ node_modules/chrome-devtools-frontend/front_end/formatter_worker/HTMLFormatter.j
 node_modules/chrome-devtools-frontend/front_end/formatter_worker/HTMLFormatter.js(171,7): error TS2554: Expected 1 arguments, but got 2.
 node_modules/chrome-devtools-frontend/front_end/formatter_worker/HTMLFormatter.js(174,33): error TS2339: Property 'peekLast' does not exist on type 'Element[]'.
 node_modules/chrome-devtools-frontend/front_end/formatter_worker/HTMLFormatter.js(185,33): error TS2339: Property 'peekLast' does not exist on type 'Element[]'.
+node_modules/chrome-devtools-frontend/front_end/formatter_worker/HTMLFormatter.js(209,33): error TS2339: Property 'peekLast' does not exist on type 'Element[]'.
 node_modules/chrome-devtools-frontend/front_end/formatter_worker/HTMLFormatter.js(290,36): error TS2339: Property 'peekLast' does not exist on type 'Element[]'.
 node_modules/chrome-devtools-frontend/front_end/formatter_worker/HTMLFormatter.js(301,50): error TS2339: Property 'peekLast' does not exist on type 'Element[]'.
 node_modules/chrome-devtools-frontend/front_end/formatter_worker/HTMLFormatter.js(302,49): error TS2339: Property 'peekLast' does not exist on type 'Element[]'.
@@ -6939,20 +6769,20 @@ node_modules/chrome-devtools-frontend/front_end/formatter_worker/JavaScriptOutli
 node_modules/chrome-devtools-frontend/front_end/formatter_worker/JavaScriptOutline.js(74,22): error TS2339: Property 'generator' does not exist on type 'Node'.
 node_modules/chrome-devtools-frontend/front_end/formatter_worker/JavaScriptOutline.js(78,22): error TS2339: Property 'async' does not exist on type 'Node'.
 node_modules/chrome-devtools-frontend/front_end/formatter_worker/JavaScriptOutline.js(155,5): error TS2554: Expected 2-3 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/formatter_worker/RelaxedJSONParser.js(41,57): error TS2694: Namespace '__object' has no exported member 'Context'.
-node_modules/chrome-devtools-frontend/front_end/formatter_worker/RelaxedJSONParser.js(44,65): error TS2694: Namespace '__object' has no exported member 'Context'.
-node_modules/chrome-devtools-frontend/front_end/formatter_worker/RelaxedJSONParser.js(57,49): error TS2694: Namespace '__object' has no exported member 'Context'.
-node_modules/chrome-devtools-frontend/front_end/formatter_worker/RelaxedJSONParser.js(89,65): error TS2694: Namespace '__object' has no exported member 'Context'.
+node_modules/chrome-devtools-frontend/front_end/formatter_worker/RelaxedJSONParser.js(41,57): error TS2694: Namespace 'FormatterWorker.RelaxedJSONParser' has no exported member 'Context'.
+node_modules/chrome-devtools-frontend/front_end/formatter_worker/RelaxedJSONParser.js(44,65): error TS2694: Namespace 'FormatterWorker.RelaxedJSONParser' has no exported member 'Context'.
+node_modules/chrome-devtools-frontend/front_end/formatter_worker/RelaxedJSONParser.js(57,49): error TS2694: Namespace 'FormatterWorker.RelaxedJSONParser' has no exported member 'Context'.
+node_modules/chrome-devtools-frontend/front_end/formatter_worker/RelaxedJSONParser.js(89,65): error TS2694: Namespace 'FormatterWorker.RelaxedJSONParser' has no exported member 'Context'.
 node_modules/chrome-devtools-frontend/front_end/formatter_worker/RelaxedJSONParser.js(93,13): error TS2403: Subsequent variable declarations must have the same type.  Variable 'newTip' must be of type '{ [x: string]: any; }', but here has type 'any[]'.
-node_modules/chrome-devtools-frontend/front_end/formatter_worker/RelaxedJSONParser.js(96,65): error TS2694: Namespace '__object' has no exported member 'Context'.
+node_modules/chrome-devtools-frontend/front_end/formatter_worker/RelaxedJSONParser.js(96,65): error TS2694: Namespace 'FormatterWorker.RelaxedJSONParser' has no exported member 'Context'.
 node_modules/chrome-devtools-frontend/front_end/formatter_worker/RelaxedJSONParser.js(104,32): error TS2339: Property 'value' does not exist on type 'Node'.
 node_modules/chrome-devtools-frontend/front_end/formatter_worker/RelaxedJSONParser.js(159,20): error TS2339: Property 'value' does not exist on type 'Node'.
-node_modules/chrome-devtools-frontend/front_end/formatter_worker/RelaxedJSONParser.js(179,103): error TS2694: Namespace '__object' has no exported member 'States'.
-node_modules/chrome-devtools-frontend/front_end/formatter_worker/RelaxedJSONParser.js(180,2): error TS1003: Identifier expected.
+node_modules/chrome-devtools-frontend/front_end/formatter_worker/RelaxedJSONParser.js(179,103): error TS2694: Namespace 'FormatterWorker.RelaxedJSONParser' has no exported member 'States'.
 node_modules/chrome-devtools-frontend/front_end/formatter_worker/RelaxedJSONParser.js(181,35): error TS2300: Duplicate identifier 'Context'.
 node_modules/chrome-devtools-frontend/front_end/formatter_worker/acorn/acorn.js(4,10): error TS2304: Cannot find name 'define'.
 node_modules/chrome-devtools-frontend/front_end/formatter_worker/acorn/acorn.js(4,35): error TS2304: Cannot find name 'define'.
 node_modules/chrome-devtools-frontend/front_end/formatter_worker/acorn/acorn.js(4,48): error TS2304: Cannot find name 'define'.
+node_modules/chrome-devtools-frontend/front_end/formatter_worker/acorn/acorn.js(402,56): error TS2339: Property 'push' does not exist on type '(token: any) => any'.
 node_modules/chrome-devtools-frontend/front_end/formatter_worker/acorn/acorn.js(527,43): error TS2339: Property 'startNode' does not exist on type 'Parser'.
 node_modules/chrome-devtools-frontend/front_end/formatter_worker/acorn/acorn.js(528,8): error TS2339: Property 'nextToken' does not exist on type 'Parser'.
 node_modules/chrome-devtools-frontend/front_end/formatter_worker/acorn/acorn.js(529,15): error TS2339: Property 'parseTopLevel' does not exist on type 'Parser'.
@@ -7013,94 +6843,8 @@ node_modules/chrome-devtools-frontend/front_end/formatter_worker.js(5,11): error
 node_modules/chrome-devtools-frontend/front_end/formatter_worker.js(6,8): error TS2339: Property 'importScripts' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/har_importer/HARImporter.js(26,11): error TS2403: Subsequent variable declarations must have the same type.  Variable 'page' must be of type 'any', but here has type 'HARPage'.
 node_modules/chrome-devtools-frontend/front_end/har_importer/HARImporter.js(46,5): error TS2322: Type 'Date' is not assignable to type 'number'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(11,26): error TS2339: Property 'createJSHeapSnapshotMockObject' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(38,26): error TS2339: Property 'createHeapSnapshotMockRaw' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(62,26): error TS2339: Property '_postprocessHeapSnapshotMock' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(68,26): error TS2339: Property 'createHeapSnapshotMock' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(69,35): error TS2339: Property '_postprocessHeapSnapshotMock' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(69,87): error TS2339: Property 'createHeapSnapshotMockRaw' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(72,26): error TS2339: Property 'createHeapSnapshotMockWithDOM' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(73,35): error TS2339: Property '_postprocessHeapSnapshotMock' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(100,26): error TS2339: Property 'HeapNode' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(101,10): error TS2339: Property '_type' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(101,49): error TS2339: Property 'HeapNode' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(102,10): error TS2339: Property '_name' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(103,10): error TS2339: Property '_selfSize' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(104,10): error TS2339: Property '_builder' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(105,10): error TS2339: Property '_edges' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(106,10): error TS2339: Property '_edgesCount' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(107,10): error TS2339: Property '_id' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(110,26): error TS2339: Property 'HeapNode' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(123,26): error TS2339: Property 'HeapNode' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(142,61): error TS2339: Property 'HeapEdge' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(167,26): error TS2339: Property 'HeapEdge' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(168,10): error TS2339: Property '_targetNode' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(169,10): error TS2339: Property '_type' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(170,10): error TS2339: Property '_nameOrIndex' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(173,26): error TS2339: Property 'HeapEdge' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(186,26): error TS2339: Property 'HeapEdge' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(196,26): error TS2339: Property 'HeapSnapshotBuilder' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(197,10): error TS2339: Property '_nodes' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(198,10): error TS2339: Property '_string2id' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(199,10): error TS2339: Property '_strings' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(200,10): error TS2339: Property 'nodeFieldsCount' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(201,10): error TS2339: Property '_nodeTypesMap' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(202,10): error TS2339: Property '_nodeTypesArray' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(204,49): error TS2339: Property 'HeapNode' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(205,12): error TS2339: Property '_nodeTypesMap' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(205,43): error TS2339: Property '_nodeTypesArray' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(206,12): error TS2339: Property '_nodeTypesArray' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(209,10): error TS2339: Property '_edgeTypesMap' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(210,10): error TS2339: Property '_edgeTypesArray' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(212,49): error TS2339: Property 'HeapEdge' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(213,12): error TS2339: Property '_edgeTypesMap' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(213,43): error TS2339: Property '_edgeTypesArray' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(214,12): error TS2339: Property '_edgeTypesArray' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(217,10): error TS2339: Property 'rootNode' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(217,48): error TS2339: Property 'HeapNode' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(218,10): error TS2339: Property 'rootNode' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(221,26): error TS2339: Property 'HeapSnapshotBuilder' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(249,51): error TS2339: Property '_postprocessHeapSnapshotMock' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(285,26): error TS2339: Property 'createHeapSnapshot' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(293,46): error TS2339: Property 'HeapSnapshotBuilder' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(296,36): error TS2339: Property 'HeapNode' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(296,85): error TS2339: Property 'HeapNode' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(297,59): error TS2339: Property 'HeapEdge' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(298,49): error TS2339: Property 'HeapNode' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(299,58): error TS2339: Property 'HeapEdge' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(300,61): error TS2339: Property 'HeapEdge' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(304,46): error TS2339: Property 'HeapNode' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(305,57): error TS2339: Property 'HeapEdge' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(307,46): error TS2339: Property 'HeapNode' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(308,52): error TS2339: Property 'HeapEdge' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(309,52): error TS2339: Property 'HeapEdge' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(320,26): error TS2339: Property '_panelReset' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(320,63): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(321,28): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(366,28): error TS2339: Property '_panelReset' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(366,48): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(590,17): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(614,34): error TS2339: Property 'HeapProfilerAgent' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(615,26): error TS2339: Property '_takeAndOpenSnapshotCallback' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(624,13): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(632,30): error TS2339: Property '_takeAndOpenSnapshotCallback' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(633,43): error TS2339: Property '_takeAndOpenSnapshotCallback' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(634,28): error TS2339: Property '_takeAndOpenSnapshotCallback' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(635,25): error TS2339: Property '_dataGrid' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(647,26): error TS2551: Property '_showProfileWhenAdded' does not exist on type 'typeof HeapProfilerTestRunner'. Did you mean 'showProfileWhenAdded'?
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(652,30): error TS2551: Property '_showProfileWhenAdded' does not exist on type 'typeof HeapProfilerTestRunner'. Did you mean 'showProfileWhenAdded'?
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(653,8): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(658,26): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(664,28): error TS2339: Property '_waitUntilProfileViewIsShownCallback' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(669,30): error TS2339: Property '_waitUntilProfileViewIsShownCallback' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(670,30): error TS2339: Property '_waitUntilProfileViewIsShownCallback' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(670,82): error TS2339: Property '_profileHeader' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(671,43): error TS2339: Property '_waitUntilProfileViewIsShownCallback' does not exist on type 'typeof HeapProfilerTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(672,35): error TS2339: Property '_waitUntilProfileViewIsShownCallback' does not exist on type 'typeof HeapProfilerTestRunner'.
 node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(678,36): error TS2339: Property 'instance' does not exist on type 'typeof SamplingHeapProfileType'.
 node_modules/chrome-devtools-frontend/front_end/heap_profiler_test_runner/HeapProfilerTestRunner.js(682,36): error TS2339: Property 'instance' does not exist on type 'typeof SamplingHeapProfileType'.
-node_modules/chrome-devtools-frontend/front_end/heap_snapshot_model/HeapSnapshotModel.js(31,19): error TS2339: Property 'HeapSnapshotProgressEvent' does not exist on type 'typeof HeapSnapshotModel'.
-node_modules/chrome-devtools-frontend/front_end/heap_snapshot_model/HeapSnapshotModel.js(36,19): error TS2339: Property 'baseSystemDistance' does not exist on type 'typeof HeapSnapshotModel'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(37,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(87,5): error TS2322: Type 'void' is not assignable to type 'HeapSnapshotNode'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(144,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
@@ -7110,10 +6854,8 @@ node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapsho
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(188,5): error TS2322: Type 'void' is not assignable to type 'HeapSnapshotNode'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(314,5): error TS2322: Type 'void' is not assignable to type 'HeapSnapshotNode'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(759,27): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(778,52): error TS2339: Property 'HeapSnapshotProgressEvent' does not exist on type 'typeof HeapSnapshotModel'.
-node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(787,52): error TS2339: Property 'HeapSnapshotProgressEvent' does not exist on type 'typeof HeapSnapshotModel'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(918,34): error TS2345: Argument of type 'Uint32Array' is not assignable to parameter of type 'number[]'.
-  Property 'flatMap' is missing in type 'Uint32Array'.
+  Property 'push' is missing in type 'Uint32Array'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(920,34): error TS2345: Argument of type 'Uint32Array' is not assignable to parameter of type 'number[]'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(1045,5): error TS2322: Type 'void' is not assignable to type 'HeapSnapshotNode'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(1083,14): error TS2339: Property 'key' does not exist on type '(arg0: HeapSnapshotNode) => boolean'.
@@ -7124,21 +6866,20 @@ node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapsho
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(1253,14): error TS2339: Property 'nodeIndex' does not exist on type 'void'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(1254,23): error TS2339: Property 'id' does not exist on type 'void'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(1255,29): error TS2339: Property 'selfSize' does not exist on type 'void'.
-node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(1314,63): error TS2339: Property 'baseSystemDistance' does not exist on type 'typeof HeapSnapshotModel'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(1345,12): error TS2339: Property 'nodeIndex' does not exist on type 'void'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(1355,31): error TS2345: Argument of type 'void' is not assignable to parameter of type 'HeapSnapshotNode'.
-node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(1369,89): error TS2694: Namespace 'HeapSnapshot' has no exported member 'AggregatedInfo'.
+node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(1369,89): error TS2694: Namespace 'HeapSnapshotWorker.HeapSnapshot' has no exported member 'AggregatedInfo'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(1370,4): error TS1131: Property or signature expected.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(1424,59): error TS2322: Type '{ aggregatesByClassName: { [x: string]: any; }; aggregatesByClassIndex: { [x: string]: any; }; }' is not assignable to type '{ aggregatesByClassName: { [x: string]: any; }; }'.
   Object literal may only specify known properties, but 'aggregatesByClassIndex' does not exist in type '{ aggregatesByClassName: { [x: string]: any; }; }'. Did you mean to write 'aggregatesByClassName'?
-node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(1428,63): error TS2694: Namespace 'HeapSnapshot' has no exported member 'AggregatedInfo'.
+node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(1428,63): error TS2694: Namespace 'HeapSnapshotWorker.HeapSnapshot' has no exported member 'AggregatedInfo'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(1447,12): error TS2339: Property 'nodeIndex' does not exist on type 'void'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(1448,29): error TS2339: Property 'classIndex' does not exist on type 'void'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(1454,39): error TS2345: Argument of type 'void' is not assignable to parameter of type 'HeapSnapshotNode'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(1455,17): error TS2339: Property 'selfSize' does not exist on type 'void'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(1456,47): error TS2339: Property 'retainedSize' does not exist on type 'void'.
-node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(1476,88): error TS2694: Namespace 'HeapSnapshot' has no exported member 'AggregatedInfo'.
-node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(1476,178): error TS2694: Namespace 'HeapSnapshot' has no exported member 'AggregatedInfo'.
+node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(1476,88): error TS2694: Namespace 'HeapSnapshotWorker.HeapSnapshot' has no exported member 'AggregatedInfo'.
+node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(1476,178): error TS2694: Namespace 'HeapSnapshotWorker.HeapSnapshot' has no exported member 'AggregatedInfo'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(1483,15): error TS2339: Property 'nodeIndex' does not exist on type 'void'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(1484,15): error TS2339: Property 'nodeIndex' does not exist on type 'void'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(1485,22): error TS2339: Property 'id' does not exist on type 'void'.
@@ -7159,39 +6900,30 @@ node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapsho
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(1975,10): error TS2339: Property 'sizeDelta' does not exist on type 'Diff'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(2021,80): error TS2339: Property 'edges' does not exist on type 'void'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(2021,89): error TS2345: Argument of type 'HeapSnapshotEdgeIndexProvider' is not assignable to parameter of type '{ [x: string]: any; itemForIndex(newIndex: number): { [x: string]: any; itemIndex(): number; seri...'.
-  Types of property 'itemForIndex' are incompatible.
-    Type '(index: number) => HeapSnapshotEdge' is not assignable to type '(newIndex: number) => { [x: string]: any; itemIndex(): number; serialize(): any; }'.
-      Type 'HeapSnapshotEdge' is not assignable to type '{ [x: string]: any; itemIndex(): number; serialize(): any; }'.
-        Property '_snapshot' does not exist on type '{ [x: string]: any; itemIndex(): number; serialize(): any; }'.
+  Property '_edge' does not exist on type '{ [x: string]: any; itemForIndex(newIndex: number): { [x: string]: any; itemIndex(): number; seri...'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(2032,80): error TS2339: Property 'edges' does not exist on type 'void'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(2032,89): error TS2345: Argument of type 'HeapSnapshotEdgeIndexProvider' is not assignable to parameter of type '{ [x: string]: any; itemForIndex(newIndex: number): { [x: string]: any; itemIndex(): number; seri...'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(2057,80): error TS2339: Property 'retainers' does not exist on type 'void'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(2057,93): error TS2345: Argument of type 'HeapSnapshotRetainerEdgeIndexProvider' is not assignable to parameter of type '{ [x: string]: any; itemForIndex(newIndex: number): { [x: string]: any; itemIndex(): number; seri...'.
-  Types of property 'itemForIndex' are incompatible.
-    Type '(index: number) => HeapSnapshotRetainerEdge' is not assignable to type '(newIndex: number) => { [x: string]: any; itemIndex(): number; serialize(): any; }'.
-      Type 'HeapSnapshotRetainerEdge' is not assignable to type '{ [x: string]: any; itemIndex(): number; serialize(): any; }'.
-        Property '_snapshot' does not exist on type '{ [x: string]: any; itemIndex(): number; serialize(): any; }'.
+  Property '_retainerEdge' does not exist on type '{ [x: string]: any; itemForIndex(newIndex: number): { [x: string]: any; itemIndex(): number; seri...'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(2118,2): error TS1131: Property or signature expected.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(2126,33): error TS2339: Property 'AggregatedInfo' does not exist on type 'typeof HeapSnapshot'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(2205,12): error TS2339: Property 'sort' does not exist on type 'HeapSnapshotItemProvider'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(2244,13): error TS2345: Argument of type 'HeapSnapshotEdgeIterator' is not assignable to parameter of type '{ [x: string]: any; hasNext(): boolean; item(): { [x: string]: any; itemIndex(): number; serializ...'.
-  Types of property 'item' are incompatible.
-    Type '() => HeapSnapshotEdge' is not assignable to type '() => { [x: string]: any; itemIndex(): number; serialize(): any; }'.
-      Type 'HeapSnapshotEdge' is not assignable to type '{ [x: string]: any; itemIndex(): number; serialize(): any; }'.
-        Property '_snapshot' does not exist on type '{ [x: string]: any; itemIndex(): number; serialize(): any; }'.
+  Property '_sourceNode' does not exist on type '{ [x: string]: any; hasNext(): boolean; item(): { [x: string]: any; itemIndex(): number; serializ...'.
+node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(2244,28): error TS2352: Type '(arg0: HeapSnapshotEdge) => boolean' cannot be converted to type '(arg0: { [x: string]: any; itemIndex(): number; serialize(): any; }) => boolean'.
+  Types of parameters 'arg0' and 'arg0' are incompatible.
+    Type '{ [x: string]: any; itemIndex(): number; serialize(): any; }' is not comparable to type 'HeapSnapshotEdge'.
+      Property '_snapshot' is missing in type '{ [x: string]: any; itemIndex(): number; serialize(): any; }'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(2283,13): error TS2339: Property 'nodeIndex' does not exist on type 'void'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(2287,13): error TS2339: Property 'nodeIndex' does not exist on type 'void'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(2322,28): error TS2339: Property 'sortRange' does not exist on type 'number[]'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(2324,28): error TS2339: Property 'sortRange' does not exist on type 'number[]'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(2326,28): error TS2339: Property 'sortRange' does not exist on type 'number[]'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(2340,68): error TS2345: Argument of type 'HeapSnapshotNodeIndexProvider' is not assignable to parameter of type '{ [x: string]: any; itemForIndex(newIndex: number): { [x: string]: any; itemIndex(): number; seri...'.
-  Types of property 'itemForIndex' are incompatible.
-    Type '(index: number) => HeapSnapshotNode' is not assignable to type '(newIndex: number) => { [x: string]: any; itemIndex(): number; serialize(): any; }'.
-      Type 'HeapSnapshotNode' is not assignable to type '{ [x: string]: any; itemIndex(): number; serialize(): any; }'.
-        Property '_snapshot' does not exist on type '{ [x: string]: any; itemIndex(): number; serialize(): any; }'.
+  Property '_node' does not exist on type '{ [x: string]: any; itemForIndex(newIndex: number): { [x: string]: any; itemIndex(): number; seri...'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(2341,15): error TS2345: Argument of type 'HeapSnapshotNodeIndexProvider' is not assignable to parameter of type '{ [x: string]: any; itemForIndex(newIndex: number): { [x: string]: any; itemIndex(): number; seri...'.
-  Types of property 'itemForIndex' are incompatible.
-    Type '(index: number) => HeapSnapshotNode' is not assignable to type '(newIndex: number) => { [x: string]: any; itemIndex(): number; serialize(): any; }'.
+  Property '_node' does not exist on type '{ [x: string]: any; itemForIndex(newIndex: number): { [x: string]: any; itemIndex(): number; seri...'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(2353,12): error TS2339: Property 'nodeIndex' does not exist on type 'void'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(2354,16): error TS2339: Property 'id' does not exist on type 'void'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(2397,13): error TS2339: Property 'nodeIndex' does not exist on type 'void'.
@@ -7208,7 +6940,6 @@ node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapsho
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(2541,38): error TS2339: Property 'isDocumentDOMTreesRoot' does not exist on type 'HeapSnapshotNode'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(2629,14): error TS2403: Subsequent variable declarations must have the same type.  Variable 'iter' must be of type 'HeapSnapshotEdgeIterator', but here has type 'any'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(2710,19): error TS2339: Property 'isDocumentDOMTreesRoot' does not exist on type 'HeapSnapshotNode'.
-node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(2762,51): error TS2339: Property 'baseSystemDistance' does not exist on type 'typeof HeapSnapshotModel'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(2842,32): error TS2339: Property '_flagsOfNode' does not exist on type 'HeapSnapshot'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(2843,38): error TS2339: Property '_nodeFlags' does not exist on type 'HeapSnapshot'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(2860,29): error TS2339: Property '_lazyStringCache' does not exist on type 'HeapSnapshot'.
@@ -7221,25 +6952,13 @@ node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapsho
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(3092,28): error TS2345: Argument of type 'string | number' is not assignable to parameter of type 'string'.
   Type 'number' is not assignable to type 'string'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshot.js(3216,12): error TS2339: Property 'Runtime' does not exist on type 'Window'.
-node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshotLoader.js(132,47): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshotWorker.js(31,3): error TS2554: Expected 2-3 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker/HeapSnapshotWorkerDispatcher.js(87,36): error TS2339: Property 'eval' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker.js(5,11): error TS2339: Property 'Runtime' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/heap_snapshot_worker.js(6,8): error TS2339: Property 'importScripts' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/help/Help.js(6,19): error TS2694: Namespace 'Help' has no exported member 'ReleaseNote'.
-node_modules/chrome-devtools-frontend/front_end/help/Help.js(9,13): error TS2551: Property '_latestReleaseNote' does not exist on type 'typeof Help'. Did you mean 'latestReleaseNote'?
-node_modules/chrome-devtools-frontend/front_end/help/Help.js(11,10): error TS2551: Property '_latestReleaseNote' does not exist on type 'typeof Help'. Did you mean 'latestReleaseNote'?
-node_modules/chrome-devtools-frontend/front_end/help/Help.js(11,36): error TS2551: Property 'releaseNoteText' does not exist on type 'typeof Help'. Did you mean 'ReleaseNoteView'?
-node_modules/chrome-devtools-frontend/front_end/help/Help.js(13,15): error TS2551: Property '_latestReleaseNote' does not exist on type 'typeof Help'. Did you mean 'latestReleaseNote'?
-node_modules/chrome-devtools-frontend/front_end/help/Help.js(20,13): error TS2551: Property '_releaseNoteVersionSetting' does not exist on type 'typeof Help'. Did you mean 'releaseNoteVersionSetting'?
-node_modules/chrome-devtools-frontend/front_end/help/Help.js(22,10): error TS2551: Property '_releaseNoteVersionSetting' does not exist on type 'typeof Help'. Did you mean 'releaseNoteVersionSetting'?
-node_modules/chrome-devtools-frontend/front_end/help/Help.js(24,15): error TS2551: Property '_releaseNoteVersionSetting' does not exist on type 'typeof Help'. Did you mean 'releaseNoteVersionSetting'?
-node_modules/chrome-devtools-frontend/front_end/help/Help.js(57,65): error TS1003: Identifier expected.
-node_modules/chrome-devtools-frontend/front_end/help/Help.js(58,6): error TS2339: Property 'ReleaseNoteHighlight' does not exist on type 'typeof Help'.
 node_modules/chrome-devtools-frontend/front_end/help/Help.js(61,74): error TS2694: Namespace 'Help' has no exported member 'ReleaseNoteHighlight'.
 node_modules/chrome-devtools-frontend/front_end/help/Help.js(62,2): error TS1131: Property or signature expected.
-node_modules/chrome-devtools-frontend/front_end/help/Help.js(64,6): error TS2339: Property 'ReleaseNote' does not exist on type 'typeof Help'.
-node_modules/chrome-devtools-frontend/front_end/help/ReleaseNoteText.js(13,6): error TS2551: Property 'releaseNoteText' does not exist on type 'typeof Help'. Did you mean 'ReleaseNoteView'?
 node_modules/chrome-devtools-frontend/front_end/help/ReleaseNoteView.js(10,42): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/help/ReleaseNoteView.js(11,30): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/help/ReleaseNoteView.js(16,20): error TS2694: Namespace 'Help' has no exported member 'ReleaseNote'.
@@ -7248,7 +6967,7 @@ node_modules/chrome-devtools-frontend/front_end/help/ReleaseNoteView.js(26,13):
 node_modules/chrome-devtools-frontend/front_end/help/ReleaseNoteView.js(29,16): error TS2339: Property 'title' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/help/ReleaseNoteView.js(34,53): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/help/ReleaseNoteView.js(35,13): error TS2339: Property 'consume' does not exist on type 'Event'.
-node_modules/chrome-devtools-frontend/front_end/help/ReleaseNoteView.js(36,29): error TS2339: Property 'openInNewTab' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/help/ReleaseNoteView.js(36,29): error TS2339: Property 'openInNewTab' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/help/ReleaseNoteView.js(38,53): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/help/ReleaseNoteView.js(39,13): error TS2339: Property 'consume' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/help/ReleaseNoteView.js(45,15): error TS2339: Property 'title' does not exist on type 'Element'.
@@ -7263,20 +6982,19 @@ node_modules/chrome-devtools-frontend/front_end/host/InspectorFrontendHost.js(25
 node_modules/chrome-devtools-frontend/front_end/host/InspectorFrontendHost.js(407,19): error TS2694: Namespace 'Adb' has no exported member 'Config'.
 node_modules/chrome-devtools-frontend/front_end/host/InspectorFrontendHost.js(445,48): error TS2694: Namespace 'InspectorFrontendHostAPI' has no exported member 'ContextMenuDescriptor'.
 node_modules/chrome-devtools-frontend/front_end/host/InspectorFrontendHost.js(471,12): error TS2538: Type 'string[]' cannot be used as an index type.
-node_modules/chrome-devtools-frontend/front_end/host/InspectorFrontendHost.js(520,36): error TS2339: Property 'InspectorFrontendHost' does not exist on type 'Window'.
+node_modules/chrome-devtools-frontend/front_end/host/InspectorFrontendHost.js(491,33): error TS2551: Property 'events' does not exist on type 'typeof InspectorFrontendHostAPI'. Did you mean 'Events'?
+node_modules/chrome-devtools-frontend/front_end/host/InspectorFrontendHost.js(501,31): error TS2551: Property 'events' does not exist on type 'typeof InspectorFrontendHostAPI'. Did you mean 'Events'?
 node_modules/chrome-devtools-frontend/front_end/host/InspectorFrontendHost.js(521,8): error TS2339: Property 'InspectorFrontendHost' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/host/InspectorFrontendHost.js(527,14): error TS2339: Property 'InspectorFrontendHost' does not exist on type 'Window'.
-node_modules/chrome-devtools-frontend/front_end/host/InspectorFrontendHost.js(527,38): error TS2322: Type 'InspectorFrontendHostStub' is not assignable to type 'typeof InspectorFrontendHost'.
-  Property 'events' is missing in type 'InspectorFrontendHostStub'.
-node_modules/chrome-devtools-frontend/front_end/host/InspectorFrontendHost.js(551,5): error TS2322: Type 'Object' is not assignable to type '{ [x: string]: any; addEventListener(eventType: symbol, listener: (arg0: any) => any, thisObject?...'.
-  Property '_listeners' does not exist on type '{ [x: string]: any; addEventListener(eventType: symbol, listener: (arg0: any) => any, thisObject?...'.
+node_modules/chrome-devtools-frontend/front_end/host/InspectorFrontendHost.js(527,38): error TS2322: Type 'InspectorFrontendHostStub' is not assignable to type 'typeof InspectorFrontendHostAPI'.
+  Property 'Events' is missing in type 'InspectorFrontendHostStub'.
+node_modules/chrome-devtools-frontend/front_end/host/InspectorFrontendHost.js(551,27): error TS2551: Property 'events' does not exist on type 'typeof InspectorFrontendHostAPI'. Did you mean 'Events'?
 node_modules/chrome-devtools-frontend/front_end/host/InspectorFrontendHost.js(557,10): error TS2339: Property 'InspectorFrontendAPI' does not exist on type 'Window'.
+node_modules/chrome-devtools-frontend/front_end/host/InspectorFrontendHost.js(563,23): error TS2551: Property 'events' does not exist on type 'typeof InspectorFrontendHostAPI'. Did you mean 'Events'?
 node_modules/chrome-devtools-frontend/front_end/host/InspectorFrontendHostAPI.js(7,8): error TS2339: Property 'InspectorFrontendHostAPI' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/host/InspectorFrontendHostAPI.js(15,50): error TS2694: Namespace 'InspectorFrontendHostAPI' has no exported member 'ContextMenuDescriptor'.
-node_modules/chrome-devtools-frontend/front_end/host/InspectorFrontendHostAPI.js(16,4): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/host/InspectorFrontendHostAPI.js(17,26): error TS2300: Duplicate identifier 'ContextMenuDescriptor'.
 node_modules/chrome-devtools-frontend/front_end/host/InspectorFrontendHostAPI.js(17,26): error TS2339: Property 'ContextMenuDescriptor' does not exist on type 'typeof InspectorFrontendHostAPI'.
-node_modules/chrome-devtools-frontend/front_end/host/InspectorFrontendHostAPI.js(23,4): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/host/InspectorFrontendHostAPI.js(24,26): error TS2339: Property 'LoadNetworkResourceResult' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/host/InspectorFrontendHostAPI.js(118,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 node_modules/chrome-devtools-frontend/front_end/host/InspectorFrontendHostAPI.js(123,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
@@ -7288,32 +7006,16 @@ node_modules/chrome-devtools-frontend/front_end/host/InspectorFrontendHostAPI.js
 node_modules/chrome-devtools-frontend/front_end/host/InspectorFrontendHostAPI.js(299,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 node_modules/chrome-devtools-frontend/front_end/host/InspectorFrontendHostAPI.js(312,48): error TS2694: Namespace 'InspectorFrontendHostAPI' has no exported member 'ContextMenuDescriptor'.
 node_modules/chrome-devtools-frontend/front_end/host/InspectorFrontendHostAPI.js(332,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
-node_modules/chrome-devtools-frontend/front_end/host/Platform.js(32,13): error TS2551: Property '_platform' does not exist on type 'typeof Host'. Did you mean 'platform'?
-node_modules/chrome-devtools-frontend/front_end/host/Platform.js(33,10): error TS2551: Property '_platform' does not exist on type 'typeof Host'. Did you mean 'platform'?
-node_modules/chrome-devtools-frontend/front_end/host/Platform.js(33,44): error TS2339: Property 'platform' does not exist on type 'typeof InspectorFrontendHost'.
-node_modules/chrome-devtools-frontend/front_end/host/Platform.js(34,15): error TS2551: Property '_platform' does not exist on type 'typeof Host'. Did you mean 'platform'?
-node_modules/chrome-devtools-frontend/front_end/host/Platform.js(41,19): error TS2551: Property '_isMac' does not exist on type 'typeof Host'. Did you mean 'isMac'?
-node_modules/chrome-devtools-frontend/front_end/host/Platform.js(42,10): error TS2551: Property '_isMac' does not exist on type 'typeof Host'. Did you mean 'isMac'?
-node_modules/chrome-devtools-frontend/front_end/host/Platform.js(44,15): error TS2551: Property '_isMac' does not exist on type 'typeof Host'. Did you mean 'isMac'?
-node_modules/chrome-devtools-frontend/front_end/host/Platform.js(51,19): error TS2551: Property '_isWin' does not exist on type 'typeof Host'. Did you mean 'isWin'?
-node_modules/chrome-devtools-frontend/front_end/host/Platform.js(52,10): error TS2551: Property '_isWin' does not exist on type 'typeof Host'. Did you mean 'isWin'?
-node_modules/chrome-devtools-frontend/front_end/host/Platform.js(54,15): error TS2551: Property '_isWin' does not exist on type 'typeof Host'. Did you mean 'isWin'?
-node_modules/chrome-devtools-frontend/front_end/host/Platform.js(61,19): error TS2551: Property '_isCustomDevtoolsFronend' does not exist on type 'typeof Host'. Did you mean 'isCustomDevtoolsFrontend'?
-node_modules/chrome-devtools-frontend/front_end/host/Platform.js(62,10): error TS2551: Property '_isCustomDevtoolsFronend' does not exist on type 'typeof Host'. Did you mean 'isCustomDevtoolsFrontend'?
-node_modules/chrome-devtools-frontend/front_end/host/Platform.js(63,15): error TS2551: Property '_isCustomDevtoolsFronend' does not exist on type 'typeof Host'. Did you mean 'isCustomDevtoolsFrontend'?
-node_modules/chrome-devtools-frontend/front_end/host/Platform.js(70,12): error TS2551: Property '_fontFamily' does not exist on type 'typeof Host'. Did you mean 'fontFamily'?
-node_modules/chrome-devtools-frontend/front_end/host/Platform.js(71,17): error TS2551: Property '_fontFamily' does not exist on type 'typeof Host'. Did you mean 'fontFamily'?
-node_modules/chrome-devtools-frontend/front_end/host/Platform.js(74,12): error TS2551: Property '_fontFamily' does not exist on type 'typeof Host'. Did you mean 'fontFamily'?
-node_modules/chrome-devtools-frontend/front_end/host/Platform.js(77,12): error TS2551: Property '_fontFamily' does not exist on type 'typeof Host'. Did you mean 'fontFamily'?
-node_modules/chrome-devtools-frontend/front_end/host/Platform.js(80,12): error TS2551: Property '_fontFamily' does not exist on type 'typeof Host'. Did you mean 'fontFamily'?
-node_modules/chrome-devtools-frontend/front_end/host/Platform.js(83,15): error TS2551: Property '_fontFamily' does not exist on type 'typeof Host'. Did you mean 'fontFamily'?
-node_modules/chrome-devtools-frontend/front_end/host/ResourceLoader.js(72,25): error TS2339: Property 'loadNetworkResource' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/host/Platform.js(33,44): error TS2339: Property 'platform' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/host/ResourceLoader.js(42,50): error TS2345: Argument of type 'StringOutputStream' is not assignable to parameter of type '{ [x: string]: any; write(data: string): Promise<any>; close(): void; }'.
+  Property '_data' does not exist on type '{ [x: string]: any; write(data: string): Promise<any>; close(): void; }'.
+node_modules/chrome-devtools-frontend/front_end/host/ResourceLoader.js(72,25): error TS2339: Property 'loadNetworkResource' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/host/ResourceLoader.js(75,40): error TS2694: Namespace 'InspectorFrontendHostAPI' has no exported member 'LoadNetworkResourceResult'.
 node_modules/chrome-devtools-frontend/front_end/host/ResourceLoader.js(88,59): error TS2694: Namespace 'InspectorFrontendHostAPI' has no exported member 'LoadNetworkResourceResult'.
 node_modules/chrome-devtools-frontend/front_end/host/ResourceLoader.js(92,59): error TS2694: Namespace 'InspectorFrontendHostAPI' has no exported member 'LoadNetworkResourceResult'.
-node_modules/chrome-devtools-frontend/front_end/host/UserMetrics.js(41,27): error TS2339: Property 'recordEnumeratedHistogram' does not exist on type 'typeof InspectorFrontendHost'.
-node_modules/chrome-devtools-frontend/front_end/host/UserMetrics.js(52,32): error TS2694: Namespace 'UserMetrics' has no exported member 'Action'.
-node_modules/chrome-devtools-frontend/front_end/host/UserMetrics.js(56,27): error TS2339: Property 'recordEnumeratedHistogram' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/host/UserMetrics.js(41,27): error TS2339: Property 'recordEnumeratedHistogram' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/host/UserMetrics.js(52,32): error TS2694: Namespace 'Host.UserMetrics' has no exported member 'Action'.
+node_modules/chrome-devtools-frontend/front_end/host/UserMetrics.js(56,27): error TS2339: Property 'recordEnumeratedHistogram' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/inline_editor/BezierEditor.js(11,25): error TS2339: Property 'tabIndex' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/inline_editor/BezierEditor.js(15,48): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/inline_editor/BezierEditor.js(18,46): error TS2339: Property 'createChild' does not exist on type 'Element'.
@@ -7331,12 +7033,11 @@ node_modules/chrome-devtools-frontend/front_end/inline_editor/BezierEditor.js(13
 node_modules/chrome-devtools-frontend/front_end/inline_editor/BezierEditor.js(134,48): error TS2339: Property 'y' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/inline_editor/BezierEditor.js(142,39): error TS2339: Property 'x' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/inline_editor/BezierEditor.js(142,48): error TS2339: Property 'y' does not exist on type 'Event'.
-node_modules/chrome-devtools-frontend/front_end/inline_editor/BezierEditor.js(149,42): error TS2694: Namespace 'BezierEditor' has no exported member 'PresetCategory'.
+node_modules/chrome-devtools-frontend/front_end/inline_editor/BezierEditor.js(149,42): error TS2694: Namespace 'InlineEditor.BezierEditor' has no exported member 'PresetCategory'.
 node_modules/chrome-devtools-frontend/front_end/inline_editor/BezierEditor.js(153,37): error TS2339: Property 'createSVGChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/inline_editor/BezierEditor.js(167,30): error TS2339: Property 'createSVGChild' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/inline_editor/BezierEditor.js(183,41): error TS2694: Namespace 'BezierEditor' has no exported member 'PresetCategory'.
+node_modules/chrome-devtools-frontend/front_end/inline_editor/BezierEditor.js(183,41): error TS2694: Namespace 'InlineEditor.BezierEditor' has no exported member 'PresetCategory'.
 node_modules/chrome-devtools-frontend/front_end/inline_editor/BezierEditor.js(197,13): error TS2339: Property 'consume' does not exist on type 'Event'.
-node_modules/chrome-devtools-frontend/front_end/inline_editor/BezierEditor.js(270,103): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/inline_editor/BezierEditor.js(271,27): error TS2339: Property 'PresetCategory' does not exist on type 'typeof BezierEditor'.
 node_modules/chrome-devtools-frontend/front_end/inline_editor/BezierUI.js(69,30): error TS2339: Property 'createSVGChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/inline_editor/BezierUI.js(85,32): error TS2339: Property 'createSVGChild' does not exist on type 'Element'.
@@ -7399,13 +7100,13 @@ node_modules/chrome-devtools-frontend/front_end/inline_editor/CSSShadowEditor.js
 node_modules/chrome-devtools-frontend/front_end/inline_editor/CSSShadowEditor.js(356,20): error TS2339: Property 'value' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/inline_editor/CSSShadowEditor.js(361,30): error TS2339: Property 'constrain' does not exist on type 'NumberConstructor'.
 node_modules/chrome-devtools-frontend/front_end/inline_editor/CSSShadowEditor.js(367,20): error TS2339: Property 'value' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/inline_editor/CSSShadowModel.js(46,28): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
-node_modules/chrome-devtools-frontend/front_end/inline_editor/CSSShadowModel.js(63,31): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/inline_editor/CSSShadowModel.js(46,38): error TS2339: Property 'splitStringByRegexes' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/inline_editor/CSSShadowModel.js(63,41): error TS2339: Property 'splitStringByRegexes' does not exist on type 'typeof TextUtils'.
 node_modules/chrome-devtools-frontend/front_end/inline_editor/ColorSwatch.js(16,35): error TS2339: Property '_constructor' does not exist on type 'typeof ColorSwatch'.
 node_modules/chrome-devtools-frontend/front_end/inline_editor/ColorSwatch.js(17,32): error TS2339: Property '_constructor' does not exist on type 'typeof ColorSwatch'.
 node_modules/chrome-devtools-frontend/front_end/inline_editor/ColorSwatch.js(21,83): error TS2339: Property '_constructor' does not exist on type 'typeof ColorSwatch'.
-node_modules/chrome-devtools-frontend/front_end/inline_editor/ColorSwatch.js(96,29): error TS2694: Namespace 'Color' has no exported member 'Format'.
-node_modules/chrome-devtools-frontend/front_end/inline_editor/ColorSwatch.js(103,28): error TS2694: Namespace 'Color' has no exported member 'Format'.
+node_modules/chrome-devtools-frontend/front_end/inline_editor/ColorSwatch.js(96,29): error TS2694: Namespace 'Common.Color' has no exported member 'Format'.
+node_modules/chrome-devtools-frontend/front_end/inline_editor/ColorSwatch.js(103,28): error TS2694: Namespace 'Common.Color' has no exported member 'Format'.
 node_modules/chrome-devtools-frontend/front_end/inline_editor/ColorSwatch.js(131,30): error TS2339: Property 'createChild' does not exist on type 'DocumentFragment'.
 node_modules/chrome-devtools-frontend/front_end/inline_editor/ColorSwatch.js(132,31): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/inline_editor/ColorSwatch.js(138,10): error TS2339: Property 'createChild' does not exist on type 'DocumentFragment'.
@@ -7421,7 +7122,7 @@ node_modules/chrome-devtools-frontend/front_end/inline_editor/ColorSwatch.js(210
 node_modules/chrome-devtools-frontend/front_end/inline_editor/ColorSwatch.js(227,39): error TS2339: Property '_constructor' does not exist on type 'typeof CSSShadowSwatch'.
 node_modules/chrome-devtools-frontend/front_end/inline_editor/ColorSwatch.js(228,36): error TS2339: Property '_constructor' does not exist on type 'typeof CSSShadowSwatch'.
 node_modules/chrome-devtools-frontend/front_end/inline_editor/ColorSwatch.js(232,91): error TS2339: Property '_constructor' does not exist on type 'typeof CSSShadowSwatch'.
-node_modules/chrome-devtools-frontend/front_end/inline_editor/ColorSwatch.js(248,29): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/inline_editor/ColorSwatch.js(248,39): error TS2339: Property 'splitStringByRegexes' does not exist on type 'typeof TextUtils'.
 node_modules/chrome-devtools-frontend/front_end/inline_editor/ColorSwatch.js(290,10): error TS2339: Property 'createChild' does not exist on type 'DocumentFragment'.
 node_modules/chrome-devtools-frontend/front_end/inline_editor/ColorSwatch.js(291,33): error TS2339: Property 'createChild' does not exist on type 'CSSShadowSwatch'.
 node_modules/chrome-devtools-frontend/front_end/inline_editor/SwatchPopoverHelper.js(12,35): error TS2345: Argument of type 'symbol' is not assignable to parameter of type '{ [x: string]: any; SetExactSize: symbol; SetExactWidthMaxHeight: symbol; MeasureContent: symbol; }'.
@@ -7436,6 +7137,9 @@ node_modules/chrome-devtools-frontend/front_end/inline_editor/SwatchPopoverHelpe
 node_modules/chrome-devtools-frontend/front_end/integration_test_runner.js(5,10): error TS2339: Property 'testRunner' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/integration_test_runner.js(6,3): error TS2304: Cannot find name 'testRunner'.
 node_modules/chrome-devtools-frontend/front_end/integration_test_runner.js(7,3): error TS2304: Cannot find name 'testRunner'.
+node_modules/chrome-devtools-frontend/front_end/layer_viewer/LayerDetailsView.js(42,38): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; hoverObject(selection: Selection): void; selectObject(selection: Selection): ...'.
+  Type 'LayerDetailsView' is not assignable to type '{ [x: string]: any; hoverObject(selection: Selection): void; selectObject(selection: Selection): ...'.
+    Property '_layerViewHost' does not exist on type '{ [x: string]: any; hoverObject(selection: Selection): void; selectObject(selection: Selection): ...'.
 node_modules/chrome-devtools-frontend/front_end/layer_viewer/LayerDetailsView.js(43,44): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/layer_viewer/LayerDetailsView.js(84,15): error TS2339: Property 'which' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/layer_viewer/LayerDetailsView.js(90,9): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; Layer: symbol; ScrollRect: symbol; Snapshot: symbol; }' and 'symbol'.
@@ -7490,6 +7194,9 @@ node_modules/chrome-devtools-frontend/front_end/layer_viewer/LayerDetailsView.js
 node_modules/chrome-devtools-frontend/front_end/layer_viewer/LayerDetailsView.js(295,48): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/layer_viewer/LayerDetailsView.js(296,48): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/layer_viewer/LayerDetailsView.js(297,47): error TS2555: Expected at least 2 arguments, but got 1.
+node_modules/chrome-devtools-frontend/front_end/layer_viewer/LayerTreeOutline.js(41,38): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; hoverObject(selection: Selection): void; selectObject(selection: Selection): ...'.
+  Type 'LayerTreeOutline' is not assignable to type '{ [x: string]: any; hoverObject(selection: Selection): void; selectObject(selection: Selection): ...'.
+    Property '_layerViewHost' does not exist on type '{ [x: string]: any; hoverObject(selection: Selection): void; selectObject(selection: Selection): ...'.
 node_modules/chrome-devtools-frontend/front_end/layer_viewer/LayerTreeOutline.js(65,31): error TS2538: Type 'symbol' cannot be used as an index type.
 node_modules/chrome-devtools-frontend/front_end/layer_viewer/LayerTreeOutline.js(78,31): error TS2538: Type 'symbol' cannot be used as an index type.
 node_modules/chrome-devtools-frontend/front_end/layer_viewer/LayerTreeOutline.js(118,24): error TS2538: Type 'symbol' cannot be used as an index type.
@@ -7502,8 +7209,8 @@ node_modules/chrome-devtools-frontend/front_end/layer_viewer/LayerTreeOutline.js
 node_modules/chrome-devtools-frontend/front_end/layer_viewer/LayerTreeOutline.js(215,17): error TS2538: Type 'symbol' cannot be used as an index type.
 node_modules/chrome-devtools-frontend/front_end/layer_viewer/LayerTreeOutline.js(222,11): error TS2339: Property 'createTextChild' does not exist on type 'DocumentFragment'.
 node_modules/chrome-devtools-frontend/front_end/layer_viewer/LayerTreeOutline.js(223,25): error TS2339: Property 'createChild' does not exist on type 'DocumentFragment'.
-node_modules/chrome-devtools-frontend/front_end/layer_viewer/LayerViewHost.js(33,47): error TS2694: Namespace 'Selection' has no exported member 'Type'.
-node_modules/chrome-devtools-frontend/front_end/layer_viewer/LayerViewHost.js(51,48): error TS2694: Namespace 'Selection' has no exported member 'Type'.
+node_modules/chrome-devtools-frontend/front_end/layer_viewer/LayerViewHost.js(33,47): error TS2694: Namespace 'LayerViewer.LayerView.Selection' has no exported member 'Type'.
+node_modules/chrome-devtools-frontend/front_end/layer_viewer/LayerViewHost.js(51,48): error TS2694: Namespace 'LayerViewer.LayerView.Selection' has no exported member 'Type'.
 node_modules/chrome-devtools-frontend/front_end/layer_viewer/LayerViewHost.js(92,11): error TS2345: Argument of type 'symbol' is not assignable to parameter of type '{ [x: string]: any; Layer: symbol; ScrollRect: symbol; Snapshot: symbol; }'.
 node_modules/chrome-devtools-frontend/front_end/layer_viewer/LayerViewHost.js(101,12): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; Layer: symbol; ScrollRect: symbol; Snapshot: symbol; }' and 'symbol'.
 node_modules/chrome-devtools-frontend/front_end/layer_viewer/LayerViewHost.js(114,11): error TS2345: Argument of type 'symbol' is not assignable to parameter of type '{ [x: string]: any; Layer: symbol; ScrollRect: symbol; Snapshot: symbol; }'.
@@ -7518,8 +7225,11 @@ node_modules/chrome-devtools-frontend/front_end/layer_viewer/LayerViewHost.js(23
 node_modules/chrome-devtools-frontend/front_end/layer_viewer/LayerViewHost.js(235,7): error TS2554: Expected 3 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/layer_viewer/Layers3DView.js(44,30): error TS2339: Property 'createTextChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/layer_viewer/Layers3DView.js(44,46): error TS2555: Expected at least 2 arguments, but got 1.
+node_modules/chrome-devtools-frontend/front_end/layer_viewer/Layers3DView.js(47,38): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; hoverObject(selection: Selection): void; selectObject(selection: Selection): ...'.
+  Type 'Layers3DView' is not assignable to type '{ [x: string]: any; hoverObject(selection: Selection): void; selectObject(selection: Selection): ...'.
+    Property '_failBanner' does not exist on type '{ [x: string]: any; hoverObject(selection: Selection): void; selectObject(selection: Selection): ...'.
 node_modules/chrome-devtools-frontend/front_end/layer_viewer/Layers3DView.js(54,47): error TS2339: Property 'createChild' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/layer_viewer/Layers3DView.js(139,40): error TS2694: Namespace 'Layers3DView' has no exported member 'OutlineType'.
+node_modules/chrome-devtools-frontend/front_end/layer_viewer/Layers3DView.js(139,40): error TS2694: Namespace 'LayerViewer.Layers3DView' has no exported member 'OutlineType'.
 node_modules/chrome-devtools-frontend/front_end/layer_viewer/Layers3DView.js(143,25): error TS2538: Type '{ [x: string]: any; Hovered: string; Selected: string; }' cannot be used as an index type.
 node_modules/chrome-devtools-frontend/front_end/layer_viewer/Layers3DView.js(152,22): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Hovered: string; Selected: string; }'.
 node_modules/chrome-devtools-frontend/front_end/layer_viewer/Layers3DView.js(160,22): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Hovered: string; Selected: string; }'.
@@ -7540,7 +7250,7 @@ node_modules/chrome-devtools-frontend/front_end/layer_viewer/Layers3DView.js(223
 node_modules/chrome-devtools-frontend/front_end/layer_viewer/Layers3DView.js(253,31): error TS2339: Property 'constrain' does not exist on type 'NumberConstructor'.
 node_modules/chrome-devtools-frontend/front_end/layer_viewer/Layers3DView.js(285,51): error TS2339: Property 'pMatrixUniform' does not exist on type 'WebGLProgram'.
 node_modules/chrome-devtools-frontend/front_end/layer_viewer/Layers3DView.js(289,15): error TS2304: Cannot find name 'CSSMatrix'.
-node_modules/chrome-devtools-frontend/front_end/layer_viewer/Layers3DView.js(309,42): error TS2694: Namespace 'Layers3DView' has no exported member 'ChromeTexture'.
+node_modules/chrome-devtools-frontend/front_end/layer_viewer/Layers3DView.js(309,42): error TS2694: Namespace 'LayerViewer.Layers3DView' has no exported member 'ChromeTexture'.
 node_modules/chrome-devtools-frontend/front_end/layer_viewer/Layers3DView.js(314,30): error TS2538: Type '{ [x: string]: any; Left: number; Middle: number; Right: number; }' cannot be used as an index type.
 node_modules/chrome-devtools-frontend/front_end/layer_viewer/Layers3DView.js(515,50): error TS2339: Property 'vertexPositionAttribute' does not exist on type 'WebGLProgram'.
 node_modules/chrome-devtools-frontend/front_end/layer_viewer/Layers3DView.js(516,50): error TS2339: Property 'textureCoordAttribute' does not exist on type 'WebGLProgram'.
@@ -7573,7 +7283,6 @@ node_modules/chrome-devtools-frontend/front_end/layer_viewer/Layers3DView.js(718
 node_modules/chrome-devtools-frontend/front_end/layer_viewer/Layers3DView.js(726,44): error TS2339: Property 'clientX' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/layer_viewer/Layers3DView.js(727,24): error TS2339: Property 'clientY' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/layer_viewer/Layers3DView.js(738,23): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; Layer: symbol; ScrollRect: symbol; Snapshot: symbol; }' and 'symbol'.
-node_modules/chrome-devtools-frontend/front_end/layer_viewer/Layers3DView.js(761,67): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/layer_viewer/Layers3DView.js(762,26): error TS2339: Property 'LayerStyle' does not exist on type 'typeof Layers3DView'.
 node_modules/chrome-devtools-frontend/front_end/layer_viewer/Layers3DView.js(794,21): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/layer_viewer/Layers3DView.js(795,22): error TS2555: Expected at least 2 arguments, but got 1.
@@ -7582,15 +7291,12 @@ node_modules/chrome-devtools-frontend/front_end/layer_viewer/Layers3DView.js(852
 node_modules/chrome-devtools-frontend/front_end/layer_viewer/Layers3DView.js(858,13): error TS2339: Property 'image' does not exist on type 'WebGLTexture'.
 node_modules/chrome-devtools-frontend/front_end/layer_viewer/Layers3DView.js(861,81): error TS2339: Property 'image' does not exist on type 'WebGLTexture'.
 node_modules/chrome-devtools-frontend/front_end/layer_viewer/Layers3DView.js(928,26): error TS2694: Namespace 'SDK' has no exported member 'SnapshotWithRect'.
-node_modules/chrome-devtools-frontend/front_end/layer_viewer/Layers3DView.js(932,39): error TS2345: Argument of type 'any[][]' is not assignable to parameter of type 'Iterable<[any, any]>'.
-  Types of property '[Symbol.iterator]' are incompatible.
-    Type '() => IterableIterator<any[]>' is not assignable to type '() => Iterator<[any, any]>'.
-      Type 'IterableIterator<any[]>' is not assignable to type 'Iterator<[any, any]>'.
-        Types of property 'next' are incompatible.
-          Type '{ (value?: any): IteratorResult<any[]>; (value?: any): IteratorResult<any[]>; }' is not assignable to type '{ (value?: any): IteratorResult<[any, any]>; (value?: any): IteratorResult<[any, any]>; }'.
-            Type 'IteratorResult<any[]>' is not assignable to type 'IteratorResult<[any, any]>'.
-              Type 'any[]' is not assignable to type '[any, any]'.
-                Property '0' is missing in type 'any[]'.
+node_modules/chrome-devtools-frontend/front_end/layer_viewer/Layers3DView.js(932,39): error TS2345: Argument of type 'any[][]' is not assignable to parameter of type 'ReadonlyArray<[any, any]>'.
+  Types of property 'concat' are incompatible.
+    Type '{ (...items: ConcatArray<any[]>[]): any[][]; (...items: (any[] | ConcatArray<any[]>)[]): any[][]; }' is not assignable to type '{ (...items: ConcatArray<[any, any]>[]): [any, any][]; (...items: ([any, any] | ConcatArray<[any,...'.
+      Type 'any[][]' is not assignable to type '[any, any][]'.
+        Type 'any[]' is not assignable to type '[any, any]'.
+          Property '0' is missing in type 'any[]'.
 node_modules/chrome-devtools-frontend/front_end/layer_viewer/Layers3DView.js(1080,24): error TS2694: Namespace 'Protocol' has no exported member 'DOM'.
 node_modules/chrome-devtools-frontend/front_end/layer_viewer/Layers3DView.js(1098,15): error TS2304: Cannot find name 'CSSMatrix'.
 node_modules/chrome-devtools-frontend/front_end/layer_viewer/Layers3DView.js(1143,19): error TS2694: Namespace 'SDK' has no exported member 'SnapshotWithRect'.
@@ -7631,7 +7337,7 @@ node_modules/chrome-devtools-frontend/front_end/layer_viewer/TransformController
 node_modules/chrome-devtools-frontend/front_end/layer_viewer/TransformController.js(50,49): error TS2345: Argument of type 'ToolbarButton' is not assignable to parameter of type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
   Type 'ToolbarButton' is not assignable to type '{ [x: string]: any; item(): any & any; }'.
 node_modules/chrome-devtools-frontend/front_end/layer_viewer/TransformController.js(116,9): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Pan: string; Rotate: string; }'.
-node_modules/chrome-devtools-frontend/front_end/layer_viewer/TransformController.js(121,47): error TS2694: Namespace 'TransformController' has no exported member 'Modes'.
+node_modules/chrome-devtools-frontend/front_end/layer_viewer/TransformController.js(121,47): error TS2694: Namespace 'LayerViewer.TransformController' has no exported member 'Modes'.
 node_modules/chrome-devtools-frontend/front_end/layer_viewer/TransformController.js(128,18): error TS2339: Property 'focus' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/layer_viewer/TransformController.js(144,18): error TS2339: Property 'focus' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/layer_viewer/TransformController.js(154,26): error TS2339: Property 'constrain' does not exist on type 'NumberConstructor'.
@@ -7675,11 +7381,6 @@ node_modules/chrome-devtools-frontend/front_end/layers/LayersPanel.js(150,22): e
 node_modules/chrome-devtools-frontend/front_end/layers/LayersPanel.js(160,58): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/layers/LayersPanel.js(169,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/layers/LayersPanel.js(187,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/layers_test_runner/LayersTestRunner.js(11,25): error TS2551: Property '_layerTreeModel' does not exist on type 'typeof LayersTestRunner'. Did you mean 'layerTreeModel'?
-node_modules/chrome-devtools-frontend/front_end/layers_test_runner/LayersTestRunner.js(12,22): error TS2551: Property '_layerTreeModel' does not exist on type 'typeof LayersTestRunner'. Did you mean 'layerTreeModel'?
-node_modules/chrome-devtools-frontend/front_end/layers_test_runner/LayersTestRunner.js(12,51): error TS2339: Property 'mainTarget' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/layers_test_runner/LayersTestRunner.js(14,27): error TS2551: Property '_layerTreeModel' does not exist on type 'typeof LayersTestRunner'. Did you mean 'layerTreeModel'?
-node_modules/chrome-devtools-frontend/front_end/layers_test_runner/LayersTestRunner.js(55,15): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
 node_modules/chrome-devtools-frontend/front_end/layers_test_runner/LayersTestRunner.js(130,3): error TS2554: Expected 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/main/ExecutionContextSelector.js(63,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/main/ExecutionContextSelector.js(83,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
@@ -7687,35 +7388,33 @@ node_modules/chrome-devtools-frontend/front_end/main/ExecutionContextSelector.js
 node_modules/chrome-devtools-frontend/front_end/main/ExecutionContextSelector.js(147,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/main/ExecutionContextSelector.js(156,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/main/Main.js(39,15): error TS2339: Property '_instanceForTest' does not exist on type 'typeof Main'.
-node_modules/chrome-devtools-frontend/front_end/main/Main.js(71,27): error TS2339: Property 'getPreferences' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/main/Main.js(71,27): error TS2339: Property 'getPreferences' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/main/Main.js(80,12): error TS2339: Property 'runtime' does not exist on type 'Window'.
-node_modules/chrome-devtools-frontend/front_end/main/Main.js(105,38): error TS2339: Property 'setPreference' does not exist on type 'typeof InspectorFrontendHost'.
-node_modules/chrome-devtools-frontend/front_end/main/Main.js(105,75): error TS2339: Property 'removePreference' does not exist on type 'typeof InspectorFrontendHost'.
-node_modules/chrome-devtools-frontend/front_end/main/Main.js(106,31): error TS2339: Property 'clearPreferences' does not exist on type 'typeof InspectorFrontendHost'.
-node_modules/chrome-devtools-frontend/front_end/main/Main.js(177,49): error TS2345: Argument of type 'typeof InspectorFrontendHost' is not assignable to parameter of type 'typeof InspectorFrontendHostAPI'.
-  Property 'Events' is missing in type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/main/Main.js(105,38): error TS2339: Property 'setPreference' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/main/Main.js(105,75): error TS2339: Property 'removePreference' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/main/Main.js(106,31): error TS2339: Property 'clearPreferences' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/main/Main.js(192,32): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/main/Main.js(193,32): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/main/Main.js(194,32): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/main/Main.js(195,32): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/main/Main.js(201,14): error TS2551: Property 'networkProjectManager' does not exist on type 'typeof Bindings'. Did you mean 'NetworkProjectManager'?
-node_modules/chrome-devtools-frontend/front_end/main/Main.js(202,14): error TS2551: Property 'resourceMapping' does not exist on type 'typeof Bindings'. Did you mean 'ResourceMapping'?
 node_modules/chrome-devtools-frontend/front_end/main/Main.js(204,5): error TS2322: Type 'CSSWorkspaceBinding' is not assignable to type '{ [x: string]: any; rawLocationToUILocation(rawLocation: CSSLocation): UILocation; uiLocationToRa...'.
   Type 'CSSWorkspaceBinding' is not assignable to type '{ [x: string]: any; rawLocationToUILocation(rawLocation: CSSLocation): UILocation; uiLocationToRa...'.
     Property '_workspace' does not exist on type '{ [x: string]: any; rawLocationToUILocation(rawLocation: CSSLocation): UILocation; uiLocationToRa...'.
 node_modules/chrome-devtools-frontend/front_end/main/Main.js(204,5): error TS2322: Type 'CSSWorkspaceBinding' is not assignable to type '{ [x: string]: any; rawLocationToUILocation(rawLocation: CSSLocation): UILocation; uiLocationToRa...'.
   Type 'CSSWorkspaceBinding' is not assignable to type '{ [x: string]: any; rawLocationToUILocation(rawLocation: CSSLocation): UILocation; uiLocationToRa...'.
 node_modules/chrome-devtools-frontend/front_end/main/Main.js(208,5): error TS2322: Type 'ExtensionServer' is not assignable to type 'typeof extensionServer'.
-  Property '_extensionAPITestHook' is missing in type 'ExtensionServer'.
 node_modules/chrome-devtools-frontend/front_end/main/Main.js(208,5): error TS2322: Type 'ExtensionServer' is not assignable to type 'typeof extensionServer'.
+  Property '_extensionAPITestHook' is missing in type 'ExtensionServer'.
 node_modules/chrome-devtools-frontend/front_end/main/Main.js(230,10): error TS2339: Property 'runtime' does not exist on type 'Window'.
-node_modules/chrome-devtools-frontend/front_end/main/Main.js(256,27): error TS2339: Property 'loadCompleted' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/main/Main.js(248,29): error TS2551: Property 'events' does not exist on type 'typeof InspectorFrontendHostAPI'. Did you mean 'Events'?
+node_modules/chrome-devtools-frontend/front_end/main/Main.js(252,27): error TS2551: Property 'events' does not exist on type 'typeof InspectorFrontendHostAPI'. Did you mean 'Events'?
+node_modules/chrome-devtools-frontend/front_end/main/Main.js(256,27): error TS2339: Property 'loadCompleted' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/main/Main.js(258,27): error TS2551: Property 'events' does not exist on type 'typeof InspectorFrontendHostAPI'. Did you mean 'Events'?
 node_modules/chrome-devtools-frontend/front_end/main/Main.js(261,27): error TS2339: Property 'runtime' does not exist on type 'Window'.
-node_modules/chrome-devtools-frontend/front_end/main/Main.js(284,27): error TS2339: Property 'connectionReady' does not exist on type 'typeof InspectorFrontendHost'.
-node_modules/chrome-devtools-frontend/front_end/main/Main.js(287,27): error TS2339: Property 'readyForTest' does not exist on type 'typeof InspectorFrontendHost'.
-node_modules/chrome-devtools-frontend/front_end/main/Main.js(294,17): error TS2339: Property '_disconnectedScreenWithReasonWasShown' does not exist on type 'typeof Main'.
+node_modules/chrome-devtools-frontend/front_end/main/Main.js(284,27): error TS2339: Property 'connectionReady' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/main/Main.js(287,27): error TS2339: Property 'readyForTest' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/main/Main.js(302,32): error TS2339: Property 'initializeExtensions' does not exist on type 'typeof extensionServer'.
-node_modules/chrome-devtools-frontend/front_end/main/Main.js(314,27): error TS2339: Property 'setWhitelistedShortcuts' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/main/Main.js(314,27): error TS2339: Property 'setWhitelistedShortcuts' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/main/Main.js(321,24): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/main/Main.js(331,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/main/Main.js(345,24): error TS2694: Namespace 'Common' has no exported member 'Event'.
@@ -7735,18 +7434,17 @@ node_modules/chrome-devtools-frontend/front_end/main/Main.js(428,19): error TS23
 node_modules/chrome-devtools-frontend/front_end/main/Main.js(450,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/main/Main.js(472,12): error TS2339: Property 'registerInspectorDispatcher' does not exist on type 'Target'.
 node_modules/chrome-devtools-frontend/front_end/main/Main.js(473,12): error TS2339: Property 'inspectorAgent' does not exist on type 'Target'.
-node_modules/chrome-devtools-frontend/front_end/main/Main.js(481,10): error TS2339: Property '_disconnectedScreenWithReasonWasShown' does not exist on type 'typeof Main'.
-node_modules/chrome-devtools-frontend/front_end/main/Main.js(536,31): error TS2339: Property 'isHostedMode' does not exist on type 'typeof InspectorFrontendHost'.
-node_modules/chrome-devtools-frontend/front_end/main/Main.js(541,31): error TS2339: Property 'zoomIn' does not exist on type 'typeof InspectorFrontendHost'.
-node_modules/chrome-devtools-frontend/front_end/main/Main.js(544,31): error TS2339: Property 'zoomOut' does not exist on type 'typeof InspectorFrontendHost'.
-node_modules/chrome-devtools-frontend/front_end/main/Main.js(547,31): error TS2339: Property 'resetZoom' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/main/Main.js(536,31): error TS2339: Property 'isHostedMode' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/main/Main.js(541,31): error TS2339: Property 'zoomIn' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/main/Main.js(544,31): error TS2339: Property 'zoomOut' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/main/Main.js(547,31): error TS2339: Property 'resetZoom' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/main/Main.js(567,65): error TS2339: Property 'deepActiveElement' does not exist on type 'Document'.
 node_modules/chrome-devtools-frontend/front_end/main/Main.js(591,25): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/main/Main.js(599,5): error TS2322: Type 'ToolbarMenuButton' is not assignable to type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
   Type 'ToolbarMenuButton' is not assignable to type '{ [x: string]: any; item(): any & any; }'.
+    Property 'item' is missing in type 'ToolbarMenuButton'.
 node_modules/chrome-devtools-frontend/front_end/main/Main.js(599,5): error TS2322: Type 'ToolbarMenuButton' is not assignable to type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
   Type 'ToolbarMenuButton' is not assignable to type '{ [x: string]: any; item(): any & any; }'.
-    Property 'item' is missing in type 'ToolbarMenuButton'.
 node_modules/chrome-devtools-frontend/front_end/main/Main.js(608,42): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/main/Main.js(609,34): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/main/Main.js(616,41): error TS2555: Expected at least 2 arguments, but got 1.
@@ -7766,9 +7464,9 @@ node_modules/chrome-devtools-frontend/front_end/main/Main.js(654,44): error TS25
 node_modules/chrome-devtools-frontend/front_end/main/Main.js(656,68): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/main/Main.js(657,27): error TS2339: Property 'runtime' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/main/Main.js(668,69): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/main/Main.js(671,54): error TS2339: Property 'openInNewTab' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/main/Main.js(671,54): error TS2339: Property 'openInNewTab' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/main/Main.js(682,32): error TS2339: Property 'createChild' does not exist on type 'DocumentFragment'.
-node_modules/chrome-devtools-frontend/front_end/main/Main.js(683,67): error TS2339: Property 'openNodeFrontend' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/main/Main.js(683,67): error TS2339: Property 'openNodeFrontend' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/main/Main.js(685,27): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/main/Main.js(702,5): error TS2322: Type 'ToolbarItem' is not assignable to type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
   Type 'ToolbarItem' is not assignable to type '{ [x: string]: any; item(): any & any; }'.
@@ -7795,7 +7493,7 @@ node_modules/chrome-devtools-frontend/front_end/main/Main.js(854,25): error TS23
 node_modules/chrome-devtools-frontend/front_end/main/Main.js(855,9): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/main/Main.js(864,28): error TS2345: Argument of type 'symbol' is not assignable to parameter of type '{ [x: string]: any; SetExactSize: symbol; SetExactWidthMaxHeight: symbol; MeasureContent: symbol; }'.
 node_modules/chrome-devtools-frontend/front_end/main/Main.js(907,12): error TS2339: Property 'pageAgent' does not exist on type 'Target'.
-node_modules/chrome-devtools-frontend/front_end/main/Main.js(911,27): error TS2339: Property 'setOpenNewWindowForPopups' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/main/Main.js(911,27): error TS2339: Property 'setOpenNewWindowForPopups' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/main/Main.js(945,9): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/main/RenderingOptions.js(37,9): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/main/RenderingOptions.js(38,9): error TS2555: Expected at least 2 arguments, but got 1.
@@ -7815,100 +7513,65 @@ node_modules/chrome-devtools-frontend/front_end/mobile_throttling/MobileThrottli
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/MobileThrottlingSelector.js(23,32): error TS2694: Namespace 'MobileThrottling' has no exported member 'Conditions'.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/MobileThrottlingSelector.js(31,33): error TS2694: Namespace 'MobileThrottling' has no exported member 'ConditionsList'.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/MobileThrottlingSelector.js(34,33): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/MobileThrottlingSelector.js(34,87): error TS2339: Property 'NoThrottlingConditions' does not exist on type 'typeof MobileThrottling'.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/MobileThrottlingSelector.js(35,32): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/MobileThrottlingSelector.js(35,84): error TS2339: Property 'mobilePresets' does not exist on type 'typeof MobileThrottling'.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/MobileThrottlingSelector.js(36,33): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/MobileThrottlingSelector.js(36,86): error TS2339: Property 'advancedMobilePresets' does not exist on type 'typeof MobileThrottling'.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/MobileThrottlingSelector.js(50,65): error TS2339: Property 'CustomConditions' does not exist on type 'typeof MobileThrottling'.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/NetworkThrottlingSelector.js(7,48): error TS2694: Namespace 'MobileThrottling' has no exported member 'NetworkThrottlingConditionsGroup'.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/NetworkThrottlingSelector.js(7,110): error TS2694: Namespace 'NetworkManager' has no exported member 'Conditions'.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/NetworkThrottlingSelector.js(9,57): error TS2694: Namespace 'NetworkManager' has no exported member 'Conditions'.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/NetworkThrottlingSelector.js(18,43): error TS2694: Namespace 'NetworkManager' has no exported member 'Conditions'.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/NetworkThrottlingSelector.js(29,34): error TS2694: Namespace 'NetworkManager' has no exported member 'Conditions'.
+node_modules/chrome-devtools-frontend/front_end/mobile_throttling/NetworkThrottlingSelector.js(7,110): error TS2694: Namespace 'SDK.NetworkManager' has no exported member 'Conditions'.
+node_modules/chrome-devtools-frontend/front_end/mobile_throttling/NetworkThrottlingSelector.js(9,57): error TS2694: Namespace 'SDK.NetworkManager' has no exported member 'Conditions'.
+node_modules/chrome-devtools-frontend/front_end/mobile_throttling/NetworkThrottlingSelector.js(18,43): error TS2694: Namespace 'SDK.NetworkManager' has no exported member 'Conditions'.
+node_modules/chrome-devtools-frontend/front_end/mobile_throttling/NetworkThrottlingSelector.js(29,34): error TS2694: Namespace 'SDK.NetworkManager' has no exported member 'Conditions'.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/NetworkThrottlingSelector.js(36,33): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/NetworkThrottlingSelector.js(37,32): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/NetworkThrottlingSelector.js(37,84): error TS2339: Property 'networkPresets' does not exist on type 'typeof MobileThrottling'.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/NetworkThrottlingSelector.js(38,31): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/NetworkThrottlingSelector.js(43,62): error TS2694: Namespace 'NetworkManager' has no exported member 'Conditions'.
+node_modules/chrome-devtools-frontend/front_end/mobile_throttling/NetworkThrottlingSelector.js(43,62): error TS2694: Namespace 'SDK.NetworkManager' has no exported member 'Conditions'.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingManager.js(11,34): error TS2694: Namespace 'MobileThrottling' has no exported member 'CPUThrottlingRates'.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingManager.js(12,48): error TS2339: Property 'CPUThrottlingRates' does not exist on type 'typeof MobileThrottling'.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingManager.js(15,49): error TS2339: Property 'cpuThrottlingPresets' does not exist on type 'typeof MobileThrottling'.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingManager.js(16,59): error TS2694: Namespace 'NetworkManager' has no exported member 'Conditions'.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingManager.js(18,36): error TS2694: Namespace 'NetworkManager' has no exported member 'Conditions'.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingManager.js(20,36): error TS2694: Namespace 'NetworkManager' has no exported member 'Conditions'.
+node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingManager.js(16,59): error TS2694: Namespace 'SDK.NetworkManager' has no exported member 'Conditions'.
+node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingManager.js(18,36): error TS2694: Namespace 'SDK.NetworkManager' has no exported member 'Conditions'.
+node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingManager.js(20,36): error TS2694: Namespace 'SDK.NetworkManager' has no exported member 'Conditions'.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingManager.js(44,42): error TS2694: Namespace 'MobileThrottling' has no exported member 'NetworkThrottlingConditionsGroup'.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingManager.js(45,44): error TS2694: Namespace 'NetworkManager' has no exported member 'Conditions'.
+node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingManager.js(45,44): error TS2694: Namespace 'SDK.NetworkManager' has no exported member 'Conditions'.
+node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingManager.js(48,21): error TS2339: Property 'removeChildren' does not exist on type 'HTMLSelectElement'.
+node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingManager.js(52,42): error TS2339: Property 'createChild' does not exist on type 'HTMLSelectElement'.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingManager.js(61,47): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingManager.js(61,77): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingManager.js(89,9): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingManager.js(89,37): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingManager.js(117,21): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingManager.js(122,34): error TS2694: Namespace 'MobileThrottling' has no exported member 'ConditionsList'.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingManager.js(136,51): error TS2339: Property 'CustomConditions' does not exist on type 'typeof MobileThrottling'.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingManager.js(137,57): error TS2339: Property 'CustomConditions' does not exist on type 'typeof MobileThrottling'.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingManager.js(140,13): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingManager.js(141,81): error TS2694: Namespace 'MobileThrottling' has no exported member 'Conditions'.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingManager.js(147,42): error TS2694: Namespace 'MobileThrottling' has no exported member 'MobileThrottlingConditionsGroup'.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingManager.js(148,35): error TS2694: Namespace 'MobileThrottling' has no exported member 'ConditionsList'.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingManager.js(178,32): error TS2694: Namespace 'MobileThrottling' has no exported member 'CPUThrottlingRates'.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingManager.js(185,54): error TS2339: Property 'CPUThrottlingRates' does not exist on type 'typeof MobileThrottling'.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingManager.js(186,36): error TS2345: Argument of type 'number' is not assignable to parameter of type '{ [x: string]: any; WindowDocked: number; WindowUndocked: number; ScriptsBreakpointSet: number; T...'.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingManager.js(188,20): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingManager.js(202,54): error TS2339: Property 'CPUThrottlingRates' does not exist on type 'typeof MobileThrottling'.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingManager.js(218,82): error TS2339: Property 'selectedIndex' does not exist on type 'EventTarget'.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingManager.js(224,32): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingManager.js(266,15): error TS2339: Property 'singleton' does not exist on type 'Window'.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingPresets.js(6,18): error TS2339: Property 'CPUThrottlingRates' does not exist on type 'typeof MobileThrottling'.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingPresets.js(14,2): error TS1131: Property or signature expected.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingPresets.js(20,18): error TS2300: Duplicate identifier 'Conditions'.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingPresets.js(20,18): error TS2339: Property 'Conditions' does not exist on type 'typeof MobileThrottling'.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingPresets.js(23,18): error TS2339: Property 'NoThrottlingConditions' does not exist on type 'typeof MobileThrottling'.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingPresets.js(25,16): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingPresets.js(27,39): error TS2339: Property 'CPUThrottlingRates' does not exist on type 'typeof MobileThrottling'.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingPresets.js(31,18): error TS2339: Property 'OfflineConditions' does not exist on type 'typeof MobileThrottling'.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingPresets.js(33,16): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingPresets.js(35,39): error TS2339: Property 'CPUThrottlingRates' does not exist on type 'typeof MobileThrottling'.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingPresets.js(39,18): error TS2339: Property 'LowEndMobileConditions' does not exist on type 'typeof MobileThrottling'.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingPresets.js(40,10): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingPresets.js(41,16): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingPresets.js(43,39): error TS2339: Property 'CPUThrottlingRates' does not exist on type 'typeof MobileThrottling'.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingPresets.js(47,18): error TS2339: Property 'MidTierMobileConditions' does not exist on type 'typeof MobileThrottling'.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingPresets.js(48,10): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingPresets.js(49,16): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingPresets.js(51,39): error TS2339: Property 'CPUThrottlingRates' does not exist on type 'typeof MobileThrottling'.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingPresets.js(56,2): error TS1131: Property or signature expected.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingPresets.js(60,18): error TS2339: Property 'PlaceholderConditions' does not exist on type 'typeof MobileThrottling'.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingPresets.js(63,18): error TS2339: Property 'CustomConditions' does not exist on type 'typeof MobileThrottling'.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingPresets.js(64,10): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingPresets.js(65,16): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingPresets.js(68,66): error TS2694: Namespace 'NetworkManager' has no exported member 'Conditions'.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingPresets.js(68,80): error TS1003: Identifier expected.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingPresets.js(69,18): error TS2339: Property 'NetworkThrottlingConditionsGroup' does not exist on type 'typeof MobileThrottling'.
+node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingPresets.js(68,66): error TS2694: Namespace 'SDK.NetworkManager' has no exported member 'Conditions'.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingPresets.js(71,64): error TS2694: Namespace 'MobileThrottling' has no exported member 'Conditions'.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingPresets.js(71,93): error TS2694: Namespace 'MobileThrottling' has no exported member 'PlaceholderConditions'.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingPresets.js(71,118): error TS1003: Identifier expected.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingPresets.js(72,18): error TS2339: Property 'MobileThrottlingConditionsGroup' does not exist on type 'typeof MobileThrottling'.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingPresets.js(74,40): error TS2694: Namespace 'MobileThrottling' has no exported member 'Conditions'.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingPresets.js(74,69): error TS2694: Namespace 'MobileThrottling' has no exported member 'PlaceholderConditions'.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingPresets.js(74,93): error TS1003: Identifier expected.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingPresets.js(75,18): error TS2339: Property 'ConditionsList' does not exist on type 'typeof MobileThrottling'.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingPresets.js(78,18): error TS2339: Property 'mobilePresets' does not exist on type 'typeof MobileThrottling'.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingPresets.js(79,20): error TS2339: Property 'MidTierMobileConditions' does not exist on type 'typeof MobileThrottling'.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingPresets.js(79,62): error TS2339: Property 'LowEndMobileConditions' does not exist on type 'typeof MobileThrottling'.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingPresets.js(79,103): error TS2339: Property 'CustomConditions' does not exist on type 'typeof MobileThrottling'.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingPresets.js(83,18): error TS2339: Property 'advancedMobilePresets' does not exist on type 'typeof MobileThrottling'.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingPresets.js(84,20): error TS2339: Property 'OfflineConditions' does not exist on type 'typeof MobileThrottling'.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingPresets.js(88,18): error TS2339: Property 'networkPresets' does not exist on type 'typeof MobileThrottling'.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingPresets.js(95,18): error TS2339: Property 'cpuThrottlingPresets' does not exist on type 'typeof MobileThrottling'.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingPresets.js(96,20): error TS2339: Property 'CPUThrottlingRates' does not exist on type 'typeof MobileThrottling'.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingPresets.js(97,20): error TS2339: Property 'CPUThrottlingRates' does not exist on type 'typeof MobileThrottling'.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingPresets.js(98,20): error TS2339: Property 'CPUThrottlingRates' does not exist on type 'typeof MobileThrottling'.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingSettingsTab.js(14,25): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingSettingsTab.js(14,68): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingSettingsTab.js(17,9): error TS2555: Expected at least 2 arguments, but got 1.
+node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingSettingsTab.js(20,36): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; renderItem(item: T, editable: boolean): Element; removeItemRequested(item: T,...'.
+  Type 'ThrottlingSettingsTab' is not assignable to type '{ [x: string]: any; renderItem(item: T, editable: boolean): Element; removeItemRequested(item: T,...'.
+    Property '_list' does not exist on type '{ [x: string]: any; renderItem(item: T, editable: boolean): Element; removeItemRequested(item: T,...'.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingSettingsTab.js(29,25): error TS2339: Property 'tabIndex' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingSettingsTab.js(61,53): error TS2694: Namespace 'NetworkManager' has no exported member 'Conditions'.
+node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingSettingsTab.js(61,53): error TS2694: Namespace 'SDK.NetworkManager' has no exported member 'Conditions'.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingSettingsTab.js(63,25): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingSettingsTab.js(67,13): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingSettingsTab.js(68,13): error TS2339: Property 'createChild' does not exist on type 'Element'.
@@ -7916,8 +7579,8 @@ node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingSett
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingSettingsTab.js(71,13): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingSettingsTab.js(72,13): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingSettingsTab.js(73,13): error TS2339: Property 'createChild' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingSettingsTab.js(95,53): error TS2694: Namespace 'NetworkManager' has no exported member 'Conditions'.
-node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingSettingsTab.js(116,53): error TS2694: Namespace 'NetworkManager' has no exported member 'Conditions'.
+node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingSettingsTab.js(95,53): error TS2694: Namespace 'SDK.NetworkManager' has no exported member 'Conditions'.
+node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingSettingsTab.js(116,53): error TS2694: Namespace 'SDK.NetworkManager' has no exported member 'Conditions'.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingSettingsTab.js(136,26): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingSettingsTab.js(138,9): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/mobile_throttling/ThrottlingSettingsTab.js(140,69): error TS2555: Expected at least 2 arguments, but got 1.
@@ -7943,45 +7606,43 @@ node_modules/chrome-devtools-frontend/front_end/network/BlockedURLsPane.js(23,37
 node_modules/chrome-devtools-frontend/front_end/network/BlockedURLsPane.js(24,44): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/network/BlockedURLsPane.js(26,37): error TS2345: Argument of type 'ToolbarButton' is not assignable to parameter of type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
   Type 'ToolbarButton' is not assignable to type '{ [x: string]: any; item(): any & any; }'.
-node_modules/chrome-devtools-frontend/front_end/network/BlockedURLsPane.js(28,51): error TS2694: Namespace 'NetworkManager' has no exported member 'BlockedPattern'.
-node_modules/chrome-devtools-frontend/front_end/network/BlockedURLsPane.js(29,5): error TS2322: Type 'ListWidget<any>' is not assignable to type '{ [x: string]: any; renderItem(item: T, editable: boolean): Element; removeItemRequested(item: T,...'.
-  Type 'ListWidget<any>' is not assignable to type '{ [x: string]: any; renderItem(item: T, editable: boolean): Element; removeItemRequested(item: T,...'.
-node_modules/chrome-devtools-frontend/front_end/network/BlockedURLsPane.js(29,5): error TS2322: Type 'ListWidget<any>' is not assignable to type '{ [x: string]: any; renderItem(item: T, editable: boolean): Element; removeItemRequested(item: T,...'.
-  Type 'ListWidget<any>' is not assignable to type '{ [x: string]: any; renderItem(item: T, editable: boolean): Element; removeItemRequested(item: T,...'.
-    Property 'renderItem' is missing in type 'ListWidget<any>'.
-node_modules/chrome-devtools-frontend/front_end/network/BlockedURLsPane.js(35,58): error TS2694: Namespace 'NetworkManager' has no exported member 'BlockedPattern'.
+node_modules/chrome-devtools-frontend/front_end/network/BlockedURLsPane.js(28,51): error TS2694: Namespace 'SDK.NetworkManager' has no exported member 'BlockedPattern'.
+node_modules/chrome-devtools-frontend/front_end/network/BlockedURLsPane.js(29,36): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; renderItem(item: T, editable: boolean): Element; removeItemRequested(item: T,...'.
+  Type 'BlockedURLsPane' is not assignable to type '{ [x: string]: any; renderItem(item: T, editable: boolean): Element; removeItemRequested(item: T,...'.
+    Property '_manager' does not exist on type '{ [x: string]: any; renderItem(item: T, editable: boolean): Element; removeItemRequested(item: T,...'.
+node_modules/chrome-devtools-frontend/front_end/network/BlockedURLsPane.js(35,58): error TS2694: Namespace 'SDK.NetworkManager' has no exported member 'BlockedPattern'.
 node_modules/chrome-devtools-frontend/front_end/network/BlockedURLsPane.js(52,39): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/network/BlockedURLsPane.js(53,47): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/network/BlockedURLsPane.js(55,27): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/network/BlockedURLsPane.js(73,34): error TS2694: Namespace 'NetworkManager' has no exported member 'BlockedPattern'.
+node_modules/chrome-devtools-frontend/front_end/network/BlockedURLsPane.js(73,34): error TS2694: Namespace 'SDK.NetworkManager' has no exported member 'BlockedPattern'.
 node_modules/chrome-devtools-frontend/front_end/network/BlockedURLsPane.js(80,28): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/network/BlockedURLsPane.js(84,13): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/network/BlockedURLsPane.js(85,13): error TS2339: Property 'createChild' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/network/BlockedURLsPane.js(92,34): error TS2694: Namespace 'NetworkManager' has no exported member 'BlockedPattern'.
+node_modules/chrome-devtools-frontend/front_end/network/BlockedURLsPane.js(92,34): error TS2694: Namespace 'SDK.NetworkManager' has no exported member 'BlockedPattern'.
 node_modules/chrome-devtools-frontend/front_end/network/BlockedURLsPane.js(96,11): error TS2339: Property 'consume' does not exist on type 'Event'.
-node_modules/chrome-devtools-frontend/front_end/network/BlockedURLsPane.js(109,34): error TS2694: Namespace 'NetworkManager' has no exported member 'BlockedPattern'.
-node_modules/chrome-devtools-frontend/front_end/network/BlockedURLsPane.js(120,34): error TS2694: Namespace 'NetworkManager' has no exported member 'BlockedPattern'.
-node_modules/chrome-devtools-frontend/front_end/network/BlockedURLsPane.js(131,34): error TS2694: Namespace 'NetworkManager' has no exported member 'BlockedPattern'.
-node_modules/chrome-devtools-frontend/front_end/network/BlockedURLsPane.js(147,57): error TS2694: Namespace 'NetworkManager' has no exported member 'BlockedPattern'.
+node_modules/chrome-devtools-frontend/front_end/network/BlockedURLsPane.js(109,34): error TS2694: Namespace 'SDK.NetworkManager' has no exported member 'BlockedPattern'.
+node_modules/chrome-devtools-frontend/front_end/network/BlockedURLsPane.js(120,34): error TS2694: Namespace 'SDK.NetworkManager' has no exported member 'BlockedPattern'.
+node_modules/chrome-devtools-frontend/front_end/network/BlockedURLsPane.js(131,34): error TS2694: Namespace 'SDK.NetworkManager' has no exported member 'BlockedPattern'.
+node_modules/chrome-devtools-frontend/front_end/network/BlockedURLsPane.js(147,57): error TS2694: Namespace 'SDK.NetworkManager' has no exported member 'BlockedPattern'.
 node_modules/chrome-devtools-frontend/front_end/network/BlockedURLsPane.js(155,26): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/network/BlockedURLsPane.js(157,9): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/network/BlockedURLsPane.js(158,26): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/network/BlockedURLsPane.js(226,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/network/EventSourceMessagesView.js(17,56): error TS2694: Namespace 'DataGrid' has no exported member 'ColumnDescriptor'.
+node_modules/chrome-devtools-frontend/front_end/network/EventSourceMessagesView.js(17,56): error TS2694: Namespace 'DataGrid.DataGrid' has no exported member 'ColumnDescriptor'.
 node_modules/chrome-devtools-frontend/front_end/network/EventSourceMessagesView.js(18,25): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/network/EventSourceMessagesView.js(19,27): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/network/EventSourceMessagesView.js(20,27): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/network/EventSourceMessagesView.js(21,27): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/network/EventSourceMessagesView.js(27,49): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Ascending: string; Descending: string; }'.
 node_modules/chrome-devtools-frontend/front_end/network/EventSourceMessagesView.js(55,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/network/EventSourceMessagesView.js(58,50): error TS2694: Namespace 'NetworkRequest' has no exported member 'EventSourceMessage'.
-node_modules/chrome-devtools-frontend/front_end/network/EventSourceMessagesView.js(78,34): error TS2694: Namespace 'NetworkRequest' has no exported member 'EventSourceMessage'.
+node_modules/chrome-devtools-frontend/front_end/network/EventSourceMessagesView.js(58,50): error TS2694: Namespace 'SDK.NetworkRequest' has no exported member 'EventSourceMessage'.
+node_modules/chrome-devtools-frontend/front_end/network/EventSourceMessagesView.js(78,34): error TS2694: Namespace 'SDK.NetworkRequest' has no exported member 'EventSourceMessage'.
 node_modules/chrome-devtools-frontend/front_end/network/EventSourceMessagesView.js(85,14): error TS2339: Property 'createTextChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/network/EventSourceMessagesView.js(86,14): error TS2339: Property 'title' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/network/EventSourceMessagesView.js(104,13): error TS2315: Type 'Object' is not generic.
 node_modules/chrome-devtools-frontend/front_end/network/EventSourceMessagesView.js(104,29): error TS1005: '>' expected.
 node_modules/chrome-devtools-frontend/front_end/network/HARWriter.js(54,23): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/network/HARWriter.js(74,36): error TS2694: Namespace 'NetworkRequest' has no exported member 'ContentData'.
+node_modules/chrome-devtools-frontend/front_end/network/HARWriter.js(74,36): error TS2694: Namespace 'SDK.NetworkRequest' has no exported member 'ContentData'.
 node_modules/chrome-devtools-frontend/front_end/network/HARWriter.js(93,23): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkConfigView.js(12,25): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkConfigView.js(14,25): error TS2339: Property 'createChild' does not exist on type 'Element'.
@@ -8015,16 +7676,14 @@ node_modules/chrome-devtools-frontend/front_end/network/NetworkConfigView.js(116
 node_modules/chrome-devtools-frontend/front_end/network/NetworkConfigView.js(126,44): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkConfigView.js(137,35): error TS2339: Property 'disabled' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkConfigView.js(138,34): error TS2339: Property 'disabled' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkDataGridNode.js(49,36): error TS2694: Namespace 'NetworkNode' has no exported member '_SupportedBackgroundColors'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkDataGridNode.js(49,36): error TS2694: Namespace 'Network.NetworkNode' has no exported member '_SupportedBackgroundColors'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkDataGridNode.js(57,62): error TS2345: Argument of type 'number' is not assignable to parameter of type '{ [x: string]: any; Unknown: number; Foreground: number; Background: number; Selection: number; }'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkDataGridNode.js(60,41): error TS2694: Namespace 'NetworkNode' has no exported member '_SupportedBackgroundColors'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkDataGridNode.js(60,41): error TS2694: Namespace 'Network.NetworkNode' has no exported member '_SupportedBackgroundColors'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkDataGridNode.js(121,13): error TS2339: Property 'style' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkDataGridNode.js(241,33): error TS2339: Property 'request' does not exist on type 'ViewportDataGridNode<any>'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkDataGridNode.js(273,4): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkDataGridNode.js(274,21): error TS2339: Property '_SupportedBackgroundColors' does not exist on type 'typeof NetworkNode'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkDataGridNode.js(276,33): error TS2694: Namespace 'NetworkNode' has no exported member '_SupportedBackgroundColors'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkDataGridNode.js(279,50): error TS2694: Namespace 'Registry' has no exported member 'ProductEntry'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkDataGridNode.js(279,96): error TS1003: Identifier expected.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkDataGridNode.js(276,33): error TS2694: Namespace 'Network.NetworkNode' has no exported member '_SupportedBackgroundColors'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkDataGridNode.js(279,50): error TS2694: Namespace 'ProductRegistry.Registry' has no exported member 'ProductEntry'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkDataGridNode.js(280,21): error TS2339: Property '_ProductEntryInfo' does not exist on type 'typeof NetworkNode'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkDataGridNode.js(392,25): error TS2339: Property 'displayType' does not exist on type 'NetworkNode'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkDataGridNode.js(393,25): error TS2339: Property 'displayType' does not exist on type 'NetworkNode'.
@@ -8039,7 +7698,7 @@ node_modules/chrome-devtools-frontend/front_end/network/NetworkDataGridNode.js(4
 node_modules/chrome-devtools-frontend/front_end/network/NetworkDataGridNode.js(416,91): error TS2339: Property '_initiatorCell' does not exist on type 'NetworkNode'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkDataGridNode.js(695,13): error TS2339: Property 'createTextChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkDataGridNode.js(696,13): error TS2339: Property 'title' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkDataGridNode.js(795,27): error TS2339: Property 'openInNewTab' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkDataGridNode.js(795,27): error TS2339: Property 'openInNewTab' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkDataGridNode.js(810,10): error TS2339: Property 'style' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkDataGridNode.js(833,10): error TS2339: Property 'createTextChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkDataGridNode.js(835,10): error TS2339: Property 'title' does not exist on type 'Element'.
@@ -8054,15 +7713,10 @@ node_modules/chrome-devtools-frontend/front_end/network/NetworkDataGridNode.js(8
 node_modules/chrome-devtools-frontend/front_end/network/NetworkDataGridNode.js(859,35): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkDataGridNode.js(861,35): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkDataGridNode.js(863,20): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkDataGridNode.js(865,23): error TS2339: Property 'Network' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkDataGridNode.js(866,20): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkDataGridNode.js(868,23): error TS2339: Property 'Network' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkDataGridNode.js(869,20): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkDataGridNode.js(871,23): error TS2339: Property 'Network' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkDataGridNode.js(872,20): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkDataGridNode.js(874,23): error TS2339: Property 'Network' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkDataGridNode.js(875,20): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkDataGridNode.js(877,23): error TS2339: Property 'Network' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkDataGridNode.js(878,20): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkDataGridNode.js(883,35): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkDataGridNode.js(885,35): error TS2555: Expected at least 2 arguments, but got 1.
@@ -8098,29 +7752,33 @@ node_modules/chrome-devtools-frontend/front_end/network/NetworkItemView.js(56,33
 node_modules/chrome-devtools-frontend/front_end/network/NetworkItemView.js(57,34): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkItemView.js(62,33): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkItemView.js(65,30): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(86,48): error TS2694: Namespace 'NetworkLogView' has no exported member 'Filter'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(88,40): error TS2694: Namespace 'NetworkLogView' has no exported member 'Filter'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(86,48): error TS2694: Namespace 'Network.NetworkLogView' has no exported member 'Filter'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(88,40): error TS2694: Namespace 'Network.NetworkLogView' has no exported member 'Filter'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(114,37): error TS2345: Argument of type 'NetworkFrameGrouper' is not assignable to parameter of type '{ [x: string]: any; groupNodeForRequest: (request: NetworkRequest) => NetworkGroupNode; reset: ()...'.
   Property '_parentView' does not exist on type '{ [x: string]: any; groupNodeForRequest: (request: NetworkRequest) => NetworkGroupNode; reset: ()...'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(121,25): error TS2345: Argument of type 'TextFilterUI' is not assignable to parameter of type '{ [x: string]: any; isActive(): boolean; element(): Element; }'.
+  Property '_filterElement' does not exist on type '{ [x: string]: any; isActive(): boolean; element(): Element; }'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(124,26): error TS2555: Expected at least 2 arguments, but got 1.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(126,25): error TS2345: Argument of type 'CheckboxFilterUI' is not assignable to parameter of type '{ [x: string]: any; isActive(): boolean; element(): Element; }'.
+  Property '_filterElement' does not exist on type '{ [x: string]: any; isActive(): boolean; element(): Element; }'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(133,25): error TS2345: Argument of type 'NamedBitSetFilterUI' is not assignable to parameter of type '{ [x: string]: any; isActive(): boolean; element(): Element; }'.
+  Property '_filtersElement' does not exist on type '{ [x: string]: any; isActive(): boolean; element(): Element; }'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(144,44): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(147,50): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(174,46): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(175,46): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(184,38): error TS2694: Namespace 'NetworkLogView' has no exported member 'Filter'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(220,39): error TS2694: Namespace 'NetworkLogView' has no exported member 'Filter'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(296,38): error TS2694: Namespace 'NetworkLogView' has no exported member 'MixedContentFilterValues'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(184,38): error TS2694: Namespace 'Network.NetworkLogView' has no exported member 'Filter'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(220,39): error TS2694: Namespace 'Network.NetworkLogView' has no exported member 'Filter'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(296,38): error TS2694: Namespace 'Network.NetworkLogView' has no exported member 'MixedContentFilterValues'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(301,9): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; All: string; Displayed: string; Blocked: string; BlockOverridden: string; }' and 'string'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(302,52): error TS2339: Property 'Security' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(303,14): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; All: string; Displayed: string; Blocked: string; BlockOverridden: string; }' and 'string'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(304,52): error TS2339: Property 'Security' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(305,14): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; All: string; Displayed: string; Blocked: string; BlockOverridden: string; }' and 'string'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(306,52): error TS2339: Property 'Security' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(307,14): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; All: string; Displayed: string; Blocked: string; BlockOverridden: string; }' and 'string'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(308,52): error TS2339: Property 'Security' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(416,27): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHost'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(423,27): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHost'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(436,27): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(416,27): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(423,27): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(436,27): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(459,37): error TS2345: Argument of type 'StringOutputStream' is not assignable to parameter of type '{ [x: string]: any; write(data: string): Promise<any>; close(): void; }'.
+  Property '_data' does not exist on type '{ [x: string]: any; write(data: string): Promise<any>; close(): void; }'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(585,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(595,40): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(596,40): error TS2339: Property 'createChild' does not exist on type 'Element'.
@@ -8146,12 +7804,9 @@ node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(905,5)
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(916,20): error TS2339: Property 'window' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(938,41): error TS2339: Property 'firstValue' does not exist on type 'Set<NetworkRequest>'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1074,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1099,47): error TS2339: Property 'Security' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1104,47): error TS2339: Property 'Security' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1109,47): error TS2339: Property 'Security' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1149,5): error TS2554: Expected 3 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1150,69): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1154,60): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1154,60): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1157,13): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1162,13): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1167,13): error TS2555: Expected at least 2 arguments, but got 1.
@@ -8171,17 +7826,19 @@ node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1194,9
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1204,13): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1214,13): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1223,13): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1254,27): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHost'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1262,27): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHost'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1274,29): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHost'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1276,29): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHost'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1283,27): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHost'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1289,27): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1254,27): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1262,27): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1274,29): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1276,29): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1283,27): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1289,27): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1303,35): error TS2345: Argument of type 'FileOutputStream' is not assignable to parameter of type '{ [x: string]: any; write(data: string): Promise<any>; close(): void; }'.
+  Property 'open' does not exist on type '{ [x: string]: any; write(data: string): Promise<any>; close(): void; }'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1309,17): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1314,17): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1487,79): error TS2694: Namespace 'NetworkLogView' has no exported member 'FilterType'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1499,38): error TS2694: Namespace 'NetworkLogView' has no exported member 'FilterType'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1501,39): error TS2694: Namespace 'NetworkLogView' has no exported member 'Filter'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1487,79): error TS2694: Namespace 'Network.NetworkLogView' has no exported member 'FilterType'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1499,38): error TS2694: Namespace 'Network.NetworkLogView' has no exported member 'FilterType'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1501,39): error TS2694: Namespace 'Network.NetworkLogView' has no exported member 'Filter'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1505,12): error TS2678: Type 'string' is not comparable to type '{ [x: string]: any; Domain: string; HasResponseHeader: string; Is: string; LargerThan: string; Me...'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1508,12): error TS2678: Type 'string' is not comparable to type '{ [x: string]: any; Domain: string; HasResponseHeader: string; Is: string; LargerThan: string; Me...'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1511,12): error TS2678: Type 'string' is not comparable to type '{ [x: string]: any; Domain: string; HasResponseHeader: string; Is: string; LargerThan: string; Me...'.
@@ -8190,26 +7847,24 @@ node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1521,1
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1524,12): error TS2678: Type 'string' is not comparable to type '{ [x: string]: any; Domain: string; HasResponseHeader: string; Is: string; LargerThan: string; Me...'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1527,12): error TS2678: Type 'string' is not comparable to type '{ [x: string]: any; Domain: string; HasResponseHeader: string; Is: string; LargerThan: string; Me...'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1529,23): error TS2352: Type 'string' cannot be converted to type '{ [x: string]: any; All: string; Displayed: string; Blocked: string; BlockOverridden: string; }'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1529,54): error TS2694: Namespace 'NetworkLogView' has no exported member 'MixedContentFilterValues'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1529,54): error TS2694: Namespace 'Network.NetworkLogView' has no exported member 'MixedContentFilterValues'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1531,12): error TS2678: Type 'string' is not comparable to type '{ [x: string]: any; Domain: string; HasResponseHeader: string; Is: string; LargerThan: string; Me...'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1534,12): error TS2678: Type 'string' is not comparable to type '{ [x: string]: any; Domain: string; HasResponseHeader: string; Is: string; LargerThan: string; Me...'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1537,12): error TS2678: Type 'string' is not comparable to type '{ [x: string]: any; Domain: string; HasResponseHeader: string; Is: string; LargerThan: string; Me...'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1540,12): error TS2678: Type 'string' is not comparable to type '{ [x: string]: any; Domain: string; HasResponseHeader: string; Is: string; LargerThan: string; Me...'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1543,12): error TS2678: Type 'string' is not comparable to type '{ [x: string]: any; Domain: string; HasResponseHeader: string; Is: string; LargerThan: string; Me...'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1546,12): error TS2678: Type 'string' is not comparable to type '{ [x: string]: any; Domain: string; HasResponseHeader: string; Is: string; LargerThan: string; Me...'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1554,39): error TS2694: Namespace 'NetworkLogView' has no exported member 'Filter'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1554,39): error TS2694: Namespace 'Network.NetworkLogView' has no exported member 'Filter'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1696,9): error TS2322: Type 'string' is not assignable to type 'number'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1697,52): error TS2339: Property 'length' does not exist on type 'number'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1754,46): error TS2339: Property 'Security' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1863,55): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1864,24): error TS2339: Property 'Filter' does not exist on type 'typeof NetworkLogView'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogView.js(1874,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(29,55): error TS2694: Namespace 'NetworkLogViewColumns' has no exported member 'Descriptor'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(48,45): error TS2694: Namespace 'NetworkLogViewColumns' has no exported member 'Descriptor'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(49,34): error TS2694: Namespace 'DataGrid' has no exported member 'ColumnDescriptor'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(52,42): error TS2694: Namespace 'DataGrid' has no exported member 'ColumnDescriptor'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(81,70): error TS2694: Namespace 'NetworkLogViewColumns' has no exported member 'Descriptor'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(83,68): error TS2694: Namespace 'NetworkLogViewColumns' has no exported member 'Descriptor'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(29,55): error TS2694: Namespace 'Network.NetworkLogViewColumns' has no exported member 'Descriptor'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(48,45): error TS2694: Namespace 'Network.NetworkLogViewColumns' has no exported member 'Descriptor'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(49,34): error TS2694: Namespace 'DataGrid.DataGrid' has no exported member 'ColumnDescriptor'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(52,42): error TS2694: Namespace 'DataGrid.DataGrid' has no exported member 'ColumnDescriptor'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(81,70): error TS2694: Namespace 'Network.NetworkLogViewColumns' has no exported member 'Descriptor'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(83,68): error TS2694: Namespace 'Network.NetworkLogViewColumns' has no exported member 'Descriptor'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(100,49): error TS2339: Property 'button' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(101,15): error TS2339: Property 'consume' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(112,59): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Ascending: string; Descending: string; }'.
@@ -8220,7 +7875,8 @@ node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(169,45): error TS2339: Property 'wheelDeltaY' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(202,73): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(207,32): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(331,45): error TS2694: Namespace 'NetworkLogViewColumns' has no exported member 'Descriptor'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(219,56): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Ascending: string; Descending: string; }'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(331,45): error TS2694: Namespace 'Network.NetworkLogViewColumns' has no exported member 'Descriptor'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(370,14): error TS2339: Property 'createTextChild' does not exist on type 'DocumentFragment'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(371,32): error TS2339: Property 'createChild' does not exist on type 'DocumentFragment'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(387,73): error TS2555: Expected at least 2 arguments, but got 1.
@@ -8231,18 +7887,20 @@ node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(406,9): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(409,9): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(412,9): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(418,47): error TS2694: Namespace 'NetworkLogViewColumns' has no exported member 'WaterfallSortIds'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(418,47): error TS2694: Namespace 'Network.NetworkLogViewColumns' has no exported member 'WaterfallSortIds'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(424,11): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; StartTime: string; ResponseTime: string; EndTime: string; Duration: string; L...' and 'string'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(424,51): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; StartTime: string; ResponseTime: string; EndTime: string; Duration: string; L...' and 'string'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(428,7): error TS2322: Type '{ [x: string]: any; StartTime: string; ResponseTime: string; EndTime: string; Duration: string; L...' is not assignable to type 'string'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(429,56): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Ascending: string; Descending: string; }'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(445,28): error TS2345: Argument of type 'symbol' is not assignable to parameter of type '{ [x: string]: any; SetExactSize: symbol; SetExactWidthMaxHeight: symbol; MeasureContent: symbol; }'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(469,46): error TS2694: Namespace 'NetworkLogViewColumns' has no exported member 'Descriptor'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(481,66): error TS2694: Namespace 'NetworkLogViewColumns' has no exported member 'Descriptor'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(469,46): error TS2694: Namespace 'Network.NetworkLogViewColumns' has no exported member 'Descriptor'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(481,66): error TS2694: Namespace 'Network.NetworkLogViewColumns' has no exported member 'Descriptor'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(522,19): error TS2694: Namespace 'UI' has no exported member 'PopoverRequest'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(531,31): error TS2339: Property 'enclosingNodeOrSelfWithClass' does not exist on type 'EventTarget'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(601,2): error TS1131: Property or signature expected.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(616,31): error TS2300: Duplicate identifier 'Descriptor'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(616,31): error TS2339: Property 'Descriptor' does not exist on type 'typeof NetworkLogViewColumns'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(640,50): error TS2694: Namespace 'NetworkLogViewColumns' has no exported member 'Descriptor'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(640,50): error TS2694: Namespace 'Network.NetworkLogViewColumns' has no exported member 'Descriptor'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(645,12): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(646,15): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(656,12): error TS2555: Expected at least 2 arguments, but got 1.
@@ -8273,6 +7931,9 @@ node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js
 node_modules/chrome-devtools-frontend/front_end/network/NetworkLogViewColumns.js(791,12): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkManageCustomHeadersView.js(22,25): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkManageCustomHeadersView.js(22,68): error TS2555: Expected at least 2 arguments, but got 1.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkManageCustomHeadersView.js(24,36): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; renderItem(item: T, editable: boolean): Element; removeItemRequested(item: T,...'.
+  Type 'NetworkManageCustomHeadersView' is not assignable to type '{ [x: string]: any; renderItem(item: T, editable: boolean): Element; removeItemRequested(item: T,...'.
+    Property '_list' does not exist on type '{ [x: string]: any; renderItem(item: T, editable: boolean): Element; removeItemRequested(item: T,...'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkManageCustomHeadersView.js(29,31): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkManageCustomHeadersView.js(33,9): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkManageCustomHeadersView.js(43,25): error TS2339: Property 'tabIndex' does not exist on type 'Element'.
@@ -8286,13 +7947,18 @@ node_modules/chrome-devtools-frontend/front_end/network/NetworkOverview.js(103,3
 node_modules/chrome-devtools-frontend/front_end/network/NetworkOverview.js(104,31): error TS2339: Property 'offsetHeight' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkOverview.js(147,18): error TS2339: Property 'window' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkOverview.js(242,31): error TS2339: Property 'offsetHeight' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkOverview.js(278,45): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkOverview.js(279,25): error TS2300: Duplicate identifier 'Window'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkOverview.js(279,25): error TS2339: Property 'Window' does not exist on type 'typeof NetworkOverview'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkPanel.js(58,54): error TS2339: Property 'createChild' does not exist on type 'Element'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkPanel.js(66,44): error TS2345: Argument of type 'NetworkOverview[]' is not assignable to parameter of type '{ [x: string]: any; show(parentElement: Element, insertBefore?: Element): void; update(): void; d...'.
+  Type 'NetworkOverview' is not assignable to type '{ [x: string]: any; show(parentElement: Element, insertBefore?: Element): void; update(): void; d...'.
+    Property '_selectedFilmStripTime' does not exist on type '{ [x: string]: any; show(parentElement: Element, insertBefore?: Element): void; update(): void; d...'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkPanel.js(67,53): error TS2339: Property 'createChild' does not exist on type 'Element'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkPanel.js(78,50): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; searchCanceled(): void; performSearch(searchConfig: SearchConfig, shouldJump:...'.
+  Type 'NetworkPanel' is not assignable to type '{ [x: string]: any; searchCanceled(): void; performSearch(searchConfig: SearchConfig, shouldJump:...'.
+    Property '_networkLogShowOverviewSetting' does not exist on type '{ [x: string]: any; searchCanceled(): void; performSearch(searchConfig: SearchConfig, shouldJump:...'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkPanel.js(79,41): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkPanel.js(125,58): error TS2694: Namespace 'NetworkLogView' has no exported member 'FilterType'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkPanel.js(125,58): error TS2694: Namespace 'Network.NetworkLogView' has no exported member 'FilterType'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkPanel.js(140,55): error TS2339: Property 'runtime' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkPanel.js(158,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkPanel.js(167,42): error TS2345: Argument of type 'ToolbarToggle' is not assignable to parameter of type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
@@ -8346,8 +8012,12 @@ node_modules/chrome-devtools-frontend/front_end/network/NetworkPanel.js(550,22):
 node_modules/chrome-devtools-frontend/front_end/network/NetworkPanel.js(558,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkPanel.js(567,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkPanel.js(575,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkPanel.js(647,42): error TS2694: Namespace 'TracingManager' has no exported member 'EventPayload'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkPanel.js(647,42): error TS2694: Namespace 'SDK.TracingManager' has no exported member 'EventPayload'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkPanel.js(684,39): error TS2555: Expected at least 2 arguments, but got 1.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkPanel.js(693,47): error TS2345: Argument of type 'TempFileBackingStorage' is not assignable to parameter of type '{ [x: string]: any; appendString(string: string): void; appendAccessibleString(string: string): (...'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkPanel.js(694,32): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; traceEventsCollected(events: any[]): void; tracingComplete(): void; tracingBu...'.
+  Type 'FilmStripRecorder' is not assignable to type '{ [x: string]: any; traceEventsCollected(events: any[]): void; tracingComplete(): void; tracingBu...'.
+    Property '_tracingManager' does not exist on type '{ [x: string]: any; traceEventsCollected(events: any[]): void; tracingComplete(): void; tracingBu...'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkPanel.js(715,39): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkTimeCalculator.js(97,19): error TS2339: Property 'secondsToString' does not exist on type 'NumberConstructor'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkTimeCalculator.js(219,7): error TS2322: Type 'Promise<void>' is not assignable to type 'Promise<undefined>'.
@@ -8360,16 +8030,16 @@ node_modules/chrome-devtools-frontend/front_end/network/NetworkTimeCalculator.js
 node_modules/chrome-devtools-frontend/front_end/network/NetworkTimeCalculator.js(358,19): error TS2339: Property 'secondsToString' does not exist on type 'NumberConstructor'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkTimeCalculator.js(395,19): error TS2339: Property 'secondsToString' does not exist on type 'NumberConstructor'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkWaterfallColumn.js(13,40): error TS2339: Property 'createChild' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkWaterfallColumn.js(61,75): error TS2694: Namespace 'NetworkWaterfallColumn' has no exported member '_LayerStyle'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkWaterfallColumn.js(63,75): error TS2694: Namespace 'NetworkWaterfallColumn' has no exported member '_LayerStyle'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkWaterfallColumn.js(61,75): error TS2694: Namespace 'Network.NetworkWaterfallColumn' has no exported member '_LayerStyle'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkWaterfallColumn.js(63,75): error TS2694: Namespace 'Network.NetworkWaterfallColumn' has no exported member '_LayerStyle'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkWaterfallColumn.js(66,67): error TS2345: Argument of type 'number' is not assignable to parameter of type '{ [x: string]: any; Unknown: number; Foreground: number; Background: number; Selection: number; }'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkWaterfallColumn.js(67,48): error TS2694: Namespace 'NetworkWaterfallColumn' has no exported member '_LayerStyle'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkWaterfallColumn.js(69,48): error TS2694: Namespace 'NetworkWaterfallColumn' has no exported member '_LayerStyle'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkWaterfallColumn.js(72,53): error TS2694: Namespace 'NetworkWaterfallColumn' has no exported member '_LayerStyle'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkWaterfallColumn.js(74,55): error TS2694: Namespace 'NetworkWaterfallColumn' has no exported member '_TextLayer'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkWaterfallColumn.js(67,48): error TS2694: Namespace 'Network.NetworkWaterfallColumn' has no exported member '_LayerStyle'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkWaterfallColumn.js(69,48): error TS2694: Namespace 'Network.NetworkWaterfallColumn' has no exported member '_LayerStyle'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkWaterfallColumn.js(72,53): error TS2694: Namespace 'Network.NetworkWaterfallColumn' has no exported member '_LayerStyle'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkWaterfallColumn.js(74,55): error TS2694: Namespace 'Network.NetworkWaterfallColumn' has no exported member '_TextLayer'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkWaterfallColumn.js(79,29): error TS2694: Namespace 'Network' has no exported member 'RequestTimeRangeNames'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkWaterfallColumn.js(79,84): error TS2694: Namespace 'NetworkWaterfallColumn' has no exported member '_LayerStyle'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkWaterfallColumn.js(101,81): error TS2694: Namespace 'NetworkWaterfallColumn' has no exported member '_LayerStyle'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkWaterfallColumn.js(79,84): error TS2694: Namespace 'Network.NetworkWaterfallColumn' has no exported member '_LayerStyle'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkWaterfallColumn.js(101,81): error TS2694: Namespace 'Network.NetworkWaterfallColumn' has no exported member '_LayerStyle'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkWaterfallColumn.js(180,54): error TS2339: Property 'offsetX' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkWaterfallColumn.js(180,69): error TS2339: Property 'offsetY' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkWaterfallColumn.js(180,85): error TS2339: Property 'shiftKey' does not exist on type 'Event'.
@@ -8384,7 +8054,9 @@ node_modules/chrome-devtools-frontend/front_end/network/NetworkWaterfallColumn.j
 node_modules/chrome-devtools-frontend/front_end/network/NetworkWaterfallColumn.js(349,45): error TS2339: Property 'offsetWidth' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkWaterfallColumn.js(350,46): error TS2339: Property 'offsetHeight' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkWaterfallColumn.js(397,64): error TS2345: Argument of type 'number' is not assignable to parameter of type '{ [x: string]: any; Unknown: number; Foreground: number; Background: number; Selection: number; }'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkWaterfallColumn.js(421,62): error TS2694: Namespace 'NetworkWaterfallColumn' has no exported member '_LayerStyle'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkWaterfallColumn.js(407,68): error TS2345: Argument of type 'NetworkTimeCalculator' is not assignable to parameter of type '{ [x: string]: any; computePosition(time: number): number; formatValue(time: number, precision?: ...'.
+  Property 'startAtZero' does not exist on type '{ [x: string]: any; computePosition(time: number): number; formatValue(time: number, precision?: ...'.
+node_modules/chrome-devtools-frontend/front_end/network/NetworkWaterfallColumn.js(421,62): error TS2694: Namespace 'Network.NetworkWaterfallColumn' has no exported member '_LayerStyle'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkWaterfallColumn.js(458,23): error TS2694: Namespace 'Network' has no exported member 'RequestTimeRangeNames'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkWaterfallColumn.js(464,12): error TS2678: Type 'string' is not comparable to type '{ [x: string]: any; Push: string; Queueing: string; Blocking: string; Connecting: string; DNS: st...'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkWaterfallColumn.js(465,12): error TS2678: Type 'string' is not comparable to type '{ [x: string]: any; Push: string; Queueing: string; Blocking: string; Connecting: string; DNS: st...'.
@@ -8393,9 +8065,7 @@ node_modules/chrome-devtools-frontend/front_end/network/NetworkWaterfallColumn.j
 node_modules/chrome-devtools-frontend/front_end/network/NetworkWaterfallColumn.js(468,12): error TS2678: Type 'string' is not comparable to type '{ [x: string]: any; Push: string; Queueing: string; Blocking: string; Connecting: string; DNS: st...'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkWaterfallColumn.js(469,12): error TS2678: Type 'string' is not comparable to type '{ [x: string]: any; Push: string; Queueing: string; Blocking: string; Connecting: string; DNS: st...'.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkWaterfallColumn.js(470,12): error TS2678: Type 'string' is not comparable to type '{ [x: string]: any; Push: string; Queueing: string; Blocking: string; Connecting: string; DNS: st...'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkWaterfallColumn.js(612,113): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkWaterfallColumn.js(613,32): error TS2339: Property '_LayerStyle' does not exist on type 'typeof NetworkWaterfallColumn'.
-node_modules/chrome-devtools-frontend/front_end/network/NetworkWaterfallColumn.js(615,54): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/network/NetworkWaterfallColumn.js(616,32): error TS2339: Property '_TextLayer' does not exist on type 'typeof NetworkWaterfallColumn'.
 node_modules/chrome-devtools-frontend/front_end/network/RequestCookiesView.js(55,48): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/network/RequestCookiesView.js(81,26): error TS2554: Expected 4 arguments, but got 0.
@@ -8414,7 +8084,7 @@ node_modules/chrome-devtools-frontend/front_end/network/RequestHeadersView.js(14
 node_modules/chrome-devtools-frontend/front_end/network/RequestHeadersView.js(158,11): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/network/RequestHeadersView.js(173,27): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/network/RequestHeadersView.js(205,34): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/network/RequestHeadersView.js(215,42): error TS2694: Namespace 'NetworkRequest' has no exported member 'NameValue'.
+node_modules/chrome-devtools-frontend/front_end/network/RequestHeadersView.js(215,42): error TS2694: Namespace 'SDK.NetworkRequest' has no exported member 'NameValue'.
 node_modules/chrome-devtools-frontend/front_end/network/RequestHeadersView.js(222,39): error TS2339: Property 'removeChildren' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/network/RequestHeadersView.js(223,39): error TS2339: Property 'createTextChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/network/RequestHeadersView.js(237,13): error TS2339: Property 'consume' does not exist on type 'Event'.
@@ -8445,7 +8115,7 @@ node_modules/chrome-devtools-frontend/front_end/network/RequestHeadersView.js(40
 node_modules/chrome-devtools-frontend/front_end/network/RequestHeadersView.js(417,40): error TS2339: Property 'removeChildren' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/network/RequestHeadersView.js(418,40): error TS2339: Property 'createTextChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/network/RequestHeadersView.js(421,40): error TS2339: Property 'createChild' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/network/RequestHeadersView.js(426,42): error TS2694: Namespace 'NetworkRequest' has no exported member 'NameValue'.
+node_modules/chrome-devtools-frontend/front_end/network/RequestHeadersView.js(426,42): error TS2694: Namespace 'SDK.NetworkRequest' has no exported member 'NameValue'.
 node_modules/chrome-devtools-frontend/front_end/network/RequestHeadersView.js(437,25): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/network/RequestHeadersView.js(439,23): error TS2339: Property 'createChild' does not exist on type 'DocumentFragment'.
 node_modules/chrome-devtools-frontend/front_end/network/RequestHeadersView.js(440,23): error TS2339: Property 'createChild' does not exist on type 'DocumentFragment'.
@@ -8456,8 +8126,12 @@ node_modules/chrome-devtools-frontend/front_end/network/RequestHeadersView.js(49
 node_modules/chrome-devtools-frontend/front_end/network/RequestHeadersView.js(514,44): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/network/RequestHeadersView.js(514,77): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/network/RequestPreviewView.js(60,33): error TS2555: Expected at least 2 arguments, but got 1.
+node_modules/chrome-devtools-frontend/front_end/network/RequestPreviewView.js(86,67): error TS2345: Argument of type 'NetworkRequest' is not assignable to parameter of type '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
+  Property '_requestId' does not exist on type '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
 node_modules/chrome-devtools-frontend/front_end/network/RequestPreviewView.js(93,31): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/network/RequestResponseView.js(46,34): error TS2694: Namespace 'NetworkRequest' has no exported member 'ContentData'.
+node_modules/chrome-devtools-frontend/front_end/network/RequestResponseView.js(46,34): error TS2694: Namespace 'SDK.NetworkRequest' has no exported member 'ContentData'.
+node_modules/chrome-devtools-frontend/front_end/network/RequestResponseView.js(83,71): error TS2345: Argument of type 'DecodingContentProvider' is not assignable to parameter of type '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
+  Property '_request' does not exist on type '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
 node_modules/chrome-devtools-frontend/front_end/network/RequestResponseView.js(118,33): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/network/RequestResponseView.js(121,31): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/network/RequestTimingView.js(48,23): error TS2694: Namespace 'Network' has no exported member 'RequestTimeRangeNames'.
@@ -8537,9 +8211,7 @@ node_modules/chrome-devtools-frontend/front_end/network/RequestTimingView.js(307
 node_modules/chrome-devtools-frontend/front_end/network/RequestTimingView.js(315,37): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/network/RequestTimingView.js(318,52): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/network/RequestTimingView.js(376,31): error TS2694: Namespace 'Network' has no exported member 'RequestTimeRangeNames'.
-node_modules/chrome-devtools-frontend/front_end/network/RequestTimingView.js(376,83): error TS1003: Identifier expected.
-node_modules/chrome-devtools-frontend/front_end/network/RequestTimingView.js(377,9): error TS2339: Property 'RequestTimeRange' does not exist on type 'typeof Network'.
-node_modules/chrome-devtools-frontend/front_end/network/ResourceWebSocketFrameView.js(35,56): error TS2694: Namespace 'DataGrid' has no exported member 'ColumnDescriptor'.
+node_modules/chrome-devtools-frontend/front_end/network/ResourceWebSocketFrameView.js(35,56): error TS2694: Namespace 'DataGrid.DataGrid' has no exported member 'ColumnDescriptor'.
 node_modules/chrome-devtools-frontend/front_end/network/ResourceWebSocketFrameView.js(36,27): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/network/ResourceWebSocketFrameView.js(38,16): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/network/ResourceWebSocketFrameView.js(43,27): error TS2555: Expected at least 2 arguments, but got 1.
@@ -8554,36 +8226,32 @@ node_modules/chrome-devtools-frontend/front_end/network/ResourceWebSocketFrameVi
   Type 'ToolbarInput' is not assignable to type '{ [x: string]: any; item(): any & any; }'.
 node_modules/chrome-devtools-frontend/front_end/network/ResourceWebSocketFrameView.js(86,49): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/network/ResourceWebSocketFrameView.js(99,11): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/network/ResourceWebSocketFrameView.js(99,66): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/network/ResourceWebSocketFrameView.js(99,66): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/network/ResourceWebSocketFrameView.js(100,46): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/network/ResourceWebSocketFrameView.js(111,32): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/network/ResourceWebSocketFrameView.js(131,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/network/ResourceWebSocketFrameView.js(134,48): error TS2694: Namespace 'NetworkRequest' has no exported member 'WebSocketFrame'.
-node_modules/chrome-devtools-frontend/front_end/network/ResourceWebSocketFrameView.js(141,34): error TS2694: Namespace 'NetworkRequest' has no exported member 'WebSocketFrame'.
+node_modules/chrome-devtools-frontend/front_end/network/ResourceWebSocketFrameView.js(134,48): error TS2694: Namespace 'SDK.NetworkRequest' has no exported member 'WebSocketFrame'.
+node_modules/chrome-devtools-frontend/front_end/network/ResourceWebSocketFrameView.js(141,34): error TS2694: Namespace 'SDK.NetworkRequest' has no exported member 'WebSocketFrame'.
 node_modules/chrome-devtools-frontend/front_end/network/ResourceWebSocketFrameView.js(158,58): error TS2339: Property 'value' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/network/ResourceWebSocketFrameView.js(165,21): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/network/ResourceWebSocketFrameView.js(182,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/network/ResourceWebSocketFrameView.js(228,43): error TS2694: Namespace 'NamedBitSetFilterUI' has no exported member 'Item'.
+node_modules/chrome-devtools-frontend/front_end/network/ResourceWebSocketFrameView.js(228,43): error TS2694: Namespace 'UI.NamedBitSetFilterUI' has no exported member 'Item'.
 node_modules/chrome-devtools-frontend/front_end/network/ResourceWebSocketFrameView.js(230,24): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/network/ResourceWebSocketFrameView.js(231,25): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/network/ResourceWebSocketFrameView.js(232,28): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/network/ResourceWebSocketFrameView.js(241,34): error TS2694: Namespace 'NetworkRequest' has no exported member 'WebSocketFrame'.
+node_modules/chrome-devtools-frontend/front_end/network/ResourceWebSocketFrameView.js(241,34): error TS2694: Namespace 'SDK.NetworkRequest' has no exported member 'WebSocketFrame'.
 node_modules/chrome-devtools-frontend/front_end/network/ResourceWebSocketFrameView.js(250,14): error TS2339: Property 'createTextChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/network/ResourceWebSocketFrameView.js(251,14): error TS2339: Property 'title' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/network/ResourceWebSocketFrameView.js(292,5): error TS2322: Type 'StaticContentProvider' is not assignable to type '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
 node_modules/chrome-devtools-frontend/front_end/network/ResourceWebSocketFrameView.js(292,5): error TS2322: Type 'StaticContentProvider' is not assignable to type '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
   Property '_contentURL' does not exist on type '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
+node_modules/chrome-devtools-frontend/front_end/network/ResourceWebSocketFrameView.js(292,5): error TS2322: Type 'StaticContentProvider' is not assignable to type '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
 node_modules/chrome-devtools-frontend/front_end/network_log/HAREntry.js(130,29): error TS2339: Property 'localizedFailDescription' does not exist on type 'NetworkRequest'.
-node_modules/chrome-devtools-frontend/front_end/network_log/HAREntry.js(150,36): error TS2694: Namespace 'HAREntry' has no exported member 'Timing'.
-node_modules/chrome-devtools-frontend/front_end/network_log/HAREntry.js(318,4): error TS1003: Identifier expected.
+node_modules/chrome-devtools-frontend/front_end/network_log/HAREntry.js(150,36): error TS2694: Namespace 'NetworkLog.HAREntry' has no exported member 'Timing'.
 node_modules/chrome-devtools-frontend/front_end/network_log/HAREntry.js(319,21): error TS2339: Property 'Timing' does not exist on type 'typeof HAREntry'.
 node_modules/chrome-devtools-frontend/front_end/network_log/NetworkLog.js(123,24): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
-node_modules/chrome-devtools-frontend/front_end/network_log/NetworkLog.js(165,38): error TS2694: Namespace 'NetworkLog' has no exported member '_InitiatorInfo'.
-node_modules/chrome-devtools-frontend/front_end/network_log/NetworkLog.js(185,39): error TS2339: Property 'Network' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/network_log/NetworkLog.js(189,46): error TS2339: Property 'Network' does not exist on type 'typeof Protocol'.
+node_modules/chrome-devtools-frontend/front_end/network_log/NetworkLog.js(165,38): error TS2694: Namespace 'NetworkLog.NetworkLog' has no exported member '_InitiatorInfo'.
 node_modules/chrome-devtools-frontend/front_end/network_log/NetworkLog.js(195,33): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/network_log/NetworkLog.js(208,46): error TS2339: Property 'Network' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/network_log/NetworkLog.js(226,38): error TS2694: Namespace 'NetworkLog' has no exported member 'InitiatorGraph'.
+node_modules/chrome-devtools-frontend/front_end/network_log/NetworkLog.js(226,38): error TS2694: Namespace 'NetworkLog.NetworkLog' has no exported member 'InitiatorGraph'.
 node_modules/chrome-devtools-frontend/front_end/network_log/NetworkLog.js(256,29): error TS2339: Property 'addAll' does not exist on type 'Set<NetworkRequest>'.
 node_modules/chrome-devtools-frontend/front_end/network_log/NetworkLog.js(289,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/network_log/NetworkLog.js(355,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
@@ -8592,11 +8260,9 @@ node_modules/chrome-devtools-frontend/front_end/network_log/NetworkLog.js(379,22
 node_modules/chrome-devtools-frontend/front_end/network_log/NetworkLog.js(388,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/network_log/NetworkLog.js(398,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/network_log/NetworkLog.js(446,75): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/network_log/NetworkLog.js(476,95): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/network_log/NetworkLog.js(477,23): error TS2339: Property 'InitiatorGraph' does not exist on type 'typeof NetworkLog'.
-node_modules/chrome-devtools-frontend/front_end/network_log/NetworkLog.js(485,43): error TS2694: Namespace 'NetworkRequest' has no exported member 'InitiatorType'.
+node_modules/chrome-devtools-frontend/front_end/network_log/NetworkLog.js(485,43): error TS2694: Namespace 'SDK.NetworkRequest' has no exported member 'InitiatorType'.
 node_modules/chrome-devtools-frontend/front_end/network_log/NetworkLog.js(485,149): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
-node_modules/chrome-devtools-frontend/front_end/network_log/NetworkLog.js(485,170): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/network_log/NetworkLog.js(486,23): error TS2339: Property '_InitiatorInfo' does not exist on type 'typeof NetworkLog'.
 node_modules/chrome-devtools-frontend/front_end/network_priorities/NetworkPriorities.js(6,22): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
 node_modules/chrome-devtools-frontend/front_end/network_priorities/NetworkPriorities.js(19,37): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
@@ -8605,66 +8271,48 @@ node_modules/chrome-devtools-frontend/front_end/network_priorities/NetworkPriori
 node_modules/chrome-devtools-frontend/front_end/network_priorities/NetworkPriorities.js(32,28): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
 node_modules/chrome-devtools-frontend/front_end/network_priorities/NetworkPriorities.js(35,29): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
 node_modules/chrome-devtools-frontend/front_end/network_priorities/NetworkPriorities.js(36,50): error TS2339: Property '_priorityUiLabelMap' does not exist on type '() => Map<any, string>'.
-node_modules/chrome-devtools-frontend/front_end/network_priorities/NetworkPriorities.js(42,20): error TS2339: Property 'Network' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/network_priorities/NetworkPriorities.js(42,54): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/network_priorities/NetworkPriorities.js(43,20): error TS2339: Property 'Network' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/network_priorities/NetworkPriorities.js(43,50): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/network_priorities/NetworkPriorities.js(44,20): error TS2339: Property 'Network' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/network_priorities/NetworkPriorities.js(44,53): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/network_priorities/NetworkPriorities.js(45,20): error TS2339: Property 'Network' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/network_priorities/NetworkPriorities.js(45,51): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/network_priorities/NetworkPriorities.js(46,20): error TS2339: Property 'Network' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/network_priorities/NetworkPriorities.js(46,55): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/network_priorities/NetworkPriorities.js(47,40): error TS2339: Property '_priorityUiLabelMap' does not exist on type '() => Map<any, string>'.
 node_modules/chrome-devtools-frontend/front_end/network_priorities/NetworkPriorities.js(53,28): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
 node_modules/chrome-devtools-frontend/front_end/network_priorities/NetworkPriorities.js(56,29): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
 node_modules/chrome-devtools-frontend/front_end/network_priorities/NetworkPriorities.js(57,66): error TS2339: Property '_symbolicToNumericPriorityMap' does not exist on type '() => Map<any, number>'.
-node_modules/chrome-devtools-frontend/front_end/network_priorities/NetworkPriorities.js(63,28): error TS2339: Property 'Network' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/network_priorities/NetworkPriorities.js(64,28): error TS2339: Property 'Network' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/network_priorities/NetworkPriorities.js(65,28): error TS2339: Property 'Network' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/network_priorities/NetworkPriorities.js(66,28): error TS2339: Property 'Network' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/network_priorities/NetworkPriorities.js(67,28): error TS2339: Property 'Network' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/network_priorities/NetworkPriorities.js(68,48): error TS2339: Property '_symbolicToNumericPriorityMap' does not exist on type '() => Map<any, number>'.
-node_modules/chrome-devtools-frontend/front_end/network_test_runner/NetworkTestRunner.js(15,60): error TS2339: Property 'networkManager' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/network_test_runner/NetworkTestRunner.js(20,27): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/network_test_runner/NetworkTestRunner.js(49,6): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/network_test_runner/NetworkTestRunner.js(53,13): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
 node_modules/chrome-devtools-frontend/front_end/network_test_runner/NetworkTestRunner.js(69,8): error TS2304: Cannot find name 'i'.
 node_modules/chrome-devtools-frontend/front_end/network_test_runner/NetworkTestRunner.js(69,15): error TS2304: Cannot find name 'i'.
 node_modules/chrome-devtools-frontend/front_end/network_test_runner/NetworkTestRunner.js(69,36): error TS2304: Cannot find name 'i'.
 node_modules/chrome-devtools-frontend/front_end/network_test_runner/NetworkTestRunner.js(70,35): error TS2304: Cannot find name 'i'.
-node_modules/chrome-devtools-frontend/front_end/network_test_runner/NetworkTestRunner.js(125,16): error TS2339: Property 'NetworkAgent' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/network_test_runner/NetworkTestRunner.js(126,16): error TS2339: Property 'NetworkAgent' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/network_test_runner/NetworkTestRunner.js(126,74): error TS2339: Property 'NetworkAgent' does not exist on type 'typeof TestRunner'.
 node_modules/chrome-devtools-frontend/front_end/object_ui/CustomPreviewComponent.js(31,20): error TS2339: Property 'classList' does not exist on type 'Node'.
 node_modules/chrome-devtools-frontend/front_end/object_ui/CustomPreviewComponent.js(94,30): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
 node_modules/chrome-devtools-frontend/front_end/object_ui/CustomPreviewComponent.js(116,11): error TS2339: Property 'consume' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/object_ui/CustomPreviewComponent.js(125,18): error TS2339: Property 'classList' does not exist on type 'Node'.
 node_modules/chrome-devtools-frontend/front_end/object_ui/CustomPreviewComponent.js(230,11): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/object_ui/JavaScriptAutocomplete.js(25,39): error TS2694: Namespace 'SuggestBox' has no exported member 'Suggestions'.
-node_modules/chrome-devtools-frontend/front_end/object_ui/JavaScriptAutocomplete.js(73,39): error TS2694: Namespace 'SuggestBox' has no exported member 'Suggestions'.
-node_modules/chrome-devtools-frontend/front_end/object_ui/JavaScriptAutocomplete.js(118,32): error TS2694: Namespace 'SuggestBox' has no exported member 'Suggestions'.
+node_modules/chrome-devtools-frontend/front_end/object_ui/JavaScriptAutocomplete.js(25,39): error TS2694: Namespace 'UI.SuggestBox' has no exported member 'Suggestions'.
+node_modules/chrome-devtools-frontend/front_end/object_ui/JavaScriptAutocomplete.js(73,39): error TS2694: Namespace 'UI.SuggestBox' has no exported member 'Suggestions'.
+node_modules/chrome-devtools-frontend/front_end/object_ui/JavaScriptAutocomplete.js(118,32): error TS2694: Namespace 'UI.SuggestBox' has no exported member 'Suggestions'.
 node_modules/chrome-devtools-frontend/front_end/object_ui/JavaScriptAutocomplete.js(132,51): error TS2339: Property 'naturalOrderComparator' does not exist on type 'StringConstructor'.
 node_modules/chrome-devtools-frontend/front_end/object_ui/JavaScriptAutocomplete.js(156,24): error TS2339: Property 'subtitle' does not exist on type '{ text: string; title: string; priority: number; }'.
 node_modules/chrome-devtools-frontend/front_end/object_ui/JavaScriptAutocomplete.js(156,35): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/object_ui/JavaScriptAutocomplete.js(165,39): error TS2694: Namespace 'SuggestBox' has no exported member 'Suggestions'.
+node_modules/chrome-devtools-frontend/front_end/object_ui/JavaScriptAutocomplete.js(165,39): error TS2694: Namespace 'UI.SuggestBox' has no exported member 'Suggestions'.
 node_modules/chrome-devtools-frontend/front_end/object_ui/JavaScriptAutocomplete.js(183,37): error TS2345: Argument of type 'string' is not assignable to parameter of type 'number'.
 node_modules/chrome-devtools-frontend/front_end/object_ui/JavaScriptAutocomplete.js(183,97): error TS2345: Argument of type 'string' is not assignable to parameter of type 'number'.
-node_modules/chrome-devtools-frontend/front_end/object_ui/JavaScriptAutocomplete.js(218,34): error TS2694: Namespace 'RuntimeModel' has no exported member 'EvaluationResult'.
-node_modules/chrome-devtools-frontend/front_end/object_ui/JavaScriptAutocomplete.js(219,66): error TS2694: Namespace 'JavaScriptAutocomplete' has no exported member 'CompletionGroup'.
+node_modules/chrome-devtools-frontend/front_end/object_ui/JavaScriptAutocomplete.js(218,34): error TS2694: Namespace 'SDK.RuntimeModel' has no exported member 'EvaluationResult'.
+node_modules/chrome-devtools-frontend/front_end/object_ui/JavaScriptAutocomplete.js(219,66): error TS2694: Namespace 'ObjectUI.JavaScriptAutocomplete' has no exported member 'CompletionGroup'.
 node_modules/chrome-devtools-frontend/front_end/object_ui/JavaScriptAutocomplete.js(262,63): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/object_ui/JavaScriptAutocomplete.js(335,16): error TS2403: Subsequent variable declarations must have the same type.  Variable 'scope' must be of type 'Scope', but here has type '{ properties: RemoteObjectProperty[]; name: string; }'.
 node_modules/chrome-devtools-frontend/front_end/object_ui/JavaScriptAutocomplete.js(336,54): error TS2339: Property 'properties' does not exist on type 'Scope'.
-node_modules/chrome-devtools-frontend/front_end/object_ui/JavaScriptAutocomplete.js(342,54): error TS2694: Namespace 'JavaScriptAutocomplete' has no exported member 'CompletionGroup'.
-node_modules/chrome-devtools-frontend/front_end/object_ui/JavaScriptAutocomplete.js(347,30): error TS2694: Namespace 'SuggestBox' has no exported member 'Suggestions'.
-node_modules/chrome-devtools-frontend/front_end/object_ui/JavaScriptAutocomplete.js(387,56): error TS2694: Namespace 'JavaScriptAutocomplete' has no exported member 'CompletionGroup'.
-node_modules/chrome-devtools-frontend/front_end/object_ui/JavaScriptAutocomplete.js(388,32): error TS2694: Namespace 'SuggestBox' has no exported member 'Suggestions'.
+node_modules/chrome-devtools-frontend/front_end/object_ui/JavaScriptAutocomplete.js(342,54): error TS2694: Namespace 'ObjectUI.JavaScriptAutocomplete' has no exported member 'CompletionGroup'.
+node_modules/chrome-devtools-frontend/front_end/object_ui/JavaScriptAutocomplete.js(347,30): error TS2694: Namespace 'UI.SuggestBox' has no exported member 'Suggestions'.
+node_modules/chrome-devtools-frontend/front_end/object_ui/JavaScriptAutocomplete.js(387,56): error TS2694: Namespace 'ObjectUI.JavaScriptAutocomplete' has no exported member 'CompletionGroup'.
+node_modules/chrome-devtools-frontend/front_end/object_ui/JavaScriptAutocomplete.js(388,32): error TS2694: Namespace 'UI.SuggestBox' has no exported member 'Suggestions'.
 node_modules/chrome-devtools-frontend/front_end/object_ui/JavaScriptAutocomplete.js(399,35): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/object_ui/JavaScriptAutocomplete.js(442,28): error TS2339: Property 'subtitle' does not exist on type '{ text: any; priority: number; }'.
 node_modules/chrome-devtools-frontend/front_end/object_ui/JavaScriptAutocomplete.js(466,19): error TS2339: Property 'naturalOrderComparator' does not exist on type 'StringConstructor'.
-node_modules/chrome-devtools-frontend/front_end/object_ui/JavaScriptAutocomplete.js(470,64): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/object_ui/JavaScriptAutocomplete.js(471,33): error TS2339: Property 'CompletionGroup' does not exist on type 'typeof JavaScriptAutocomplete'.
-node_modules/chrome-devtools-frontend/front_end/object_ui/ObjectPopoverHelper.js(82,35): error TS2694: Namespace 'DebuggerModel' has no exported member 'FunctionDetails'.
+node_modules/chrome-devtools-frontend/front_end/object_ui/ObjectPopoverHelper.js(82,35): error TS2694: Namespace 'SDK.DebuggerModel' has no exported member 'FunctionDetails'.
 node_modules/chrome-devtools-frontend/front_end/object_ui/ObjectPopoverHelper.js(91,29): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/object_ui/ObjectPopoverHelper.js(114,48): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/object_ui/ObjectPopoverHelper.js(129,7): error TS2722: Cannot invoke an object which is possibly 'undefined'.
@@ -8695,7 +8343,7 @@ node_modules/chrome-devtools-frontend/front_end/object_ui/ObjectPropertiesSectio
 node_modules/chrome-devtools-frontend/front_end/object_ui/ObjectPropertiesSection.js(325,20): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/object_ui/ObjectPropertiesSection.js(326,20): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/object_ui/ObjectPropertiesSection.js(328,20): error TS2339: Property 'title' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/object_ui/ObjectPropertiesSection.js(343,35): error TS2694: Namespace 'DebuggerModel' has no exported member 'FunctionDetails'.
+node_modules/chrome-devtools-frontend/front_end/object_ui/ObjectPropertiesSection.js(343,35): error TS2694: Namespace 'SDK.DebuggerModel' has no exported member 'FunctionDetails'.
 node_modules/chrome-devtools-frontend/front_end/object_ui/ObjectPropertiesSection.js(392,11): error TS2554: Expected 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/object_ui/ObjectPropertiesSection.js(395,11): error TS2554: Expected 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/object_ui/ObjectPropertiesSection.js(468,48): error TS2339: Property '_skipProto' does not exist on type 'TreeOutline'.
@@ -8712,7 +8360,6 @@ node_modules/chrome-devtools-frontend/front_end/object_ui/ObjectPropertiesSectio
 node_modules/chrome-devtools-frontend/front_end/object_ui/ObjectPropertiesSection.js(626,31): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/object_ui/ObjectPropertiesSection.js(627,27): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/object_ui/ObjectPropertiesSection.js(631,21): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/object_ui/ObjectPropertiesSection.js(648,25): error TS2339: Property 'highlightedSearchResultClassName' does not exist on type 'typeof UI'.
 node_modules/chrome-devtools-frontend/front_end/object_ui/ObjectPropertiesSection.js(690,57): error TS2339: Property '_skipProto' does not exist on type 'TreeOutline'.
 node_modules/chrome-devtools-frontend/front_end/object_ui/ObjectPropertiesSection.js(691,90): error TS2339: Property 'parentObject' does not exist on type 'RemoteObjectProperty'.
 node_modules/chrome-devtools-frontend/front_end/object_ui/ObjectPropertiesSection.js(703,111): error TS2339: Property 'setter' does not exist on type 'RemoteObjectProperty'.
@@ -8730,7 +8377,7 @@ node_modules/chrome-devtools-frontend/front_end/object_ui/ObjectPropertiesSectio
 node_modules/chrome-devtools-frontend/front_end/object_ui/ObjectPropertiesSection.js(806,24): error TS2339: Property 'title' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/object_ui/ObjectPropertiesSection.js(808,24): error TS2339: Property 'title' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/object_ui/ObjectPropertiesSection.js(820,46): error TS2339: Property 'title' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/object_ui/ObjectPropertiesSection.js(821,51): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/object_ui/ObjectPropertiesSection.js(821,51): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/object_ui/ObjectPropertiesSection.js(821,105): error TS2339: Property 'title' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/object_ui/ObjectPropertiesSection.js(822,49): error TS2554: Expected 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/object_ui/ObjectPropertiesSection.js(824,23): error TS2339: Property 'parentObject' does not exist on type 'RemoteObjectProperty'.
@@ -8759,7 +8406,7 @@ node_modules/chrome-devtools-frontend/front_end/object_ui/ObjectPropertiesSectio
 node_modules/chrome-devtools-frontend/front_end/object_ui/ObjectPropertiesSection.js(1353,47): error TS2339: Property 'objectTreeElement' does not exist on type 'TreeOutline'.
 node_modules/chrome-devtools-frontend/front_end/object_ui/ObjectPropertiesSection.js(1359,19): error TS2339: Property 'property' does not exist on type 'TreeElement'.
 node_modules/chrome-devtools-frontend/front_end/object_ui/ObjectPropertiesSection.js(1360,31): error TS2339: Property 'property' does not exist on type 'TreeElement'.
-node_modules/chrome-devtools-frontend/front_end/object_ui/ObjectPropertiesSection.js(1384,31): error TS2694: Namespace 'Renderer' has no exported member 'Options'.
+node_modules/chrome-devtools-frontend/front_end/object_ui/ObjectPropertiesSection.js(1384,31): error TS2694: Namespace 'Common.Renderer' has no exported member 'Options'.
 node_modules/chrome-devtools-frontend/front_end/object_ui/ObjectPropertiesSection.js(1397,13): error TS2551: Property 'editable' does not exist on type 'ObjectPropertiesSection'. Did you mean '_editable'?
 node_modules/chrome-devtools-frontend/front_end/object_ui/RemoteObjectPreviewFormatter.js(9,24): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
 node_modules/chrome-devtools-frontend/front_end/object_ui/RemoteObjectPreviewFormatter.js(10,24): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
@@ -8835,6 +8482,7 @@ node_modules/chrome-devtools-frontend/front_end/perf_ui/FilmStripView.js(60,61):
 node_modules/chrome-devtools-frontend/front_end/perf_ui/FilmStripView.js(61,32): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/FilmStripView.js(97,33): error TS2339: Property 'upperBound' does not exist on type 'Frame[]'.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/FilmStripView.js(138,17): error TS2339: Property 'style' does not exist on type 'Element'.
+node_modules/chrome-devtools-frontend/front_end/perf_ui/FilmStripView.js(148,27): error TS2339: Property 'removeChildren' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/FilmStripView.js(168,35): error TS2345: Argument of type 'string' is not assignable to parameter of type 'symbol'.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/FilmStripView.js(180,25): error TS2339: Property 'removeChildren' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/FilmStripView.js(211,16): error TS2339: Property 'title' does not exist on type 'Element'.
@@ -8848,6 +8496,9 @@ node_modules/chrome-devtools-frontend/front_end/perf_ui/FilmStripView.js(256,35)
 node_modules/chrome-devtools-frontend/front_end/perf_ui/FilmStripView.js(263,35): error TS2339: Property 'metaKey' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/FilmStripView.js(306,51): error TS2339: Property 'millisToString' does not exist on type 'NumberConstructor'.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/FilmStripView.js(307,5): error TS2322: Type 'Promise<string>' is not assignable to type 'Promise<undefined>'.
+node_modules/chrome-devtools-frontend/front_end/perf_ui/FlameChart.js(68,52): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; requestWindowTimes(startTime: number, endTime: number): void; updateRangeSele...'.
+  Type 'FlameChart' is not assignable to type '{ [x: string]: any; requestWindowTimes(startTime: number, endTime: number): void; updateRangeSele...'.
+    Property '_groupExpansionSetting' does not exist on type '{ [x: string]: any; requestWindowTimes(startTime: number, endTime: number): void; updateRangeSele...'.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/FlameChart.js(307,36): error TS2339: Property 'offsetX' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/FlameChart.js(308,36): error TS2339: Property 'offsetY' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/FlameChart.js(313,45): error TS2339: Property 'offsetX' does not exist on type 'Event'.
@@ -8871,15 +8522,17 @@ node_modules/chrome-devtools-frontend/front_end/perf_ui/FlameChart.js(625,41): e
 node_modules/chrome-devtools-frontend/front_end/perf_ui/FlameChart.js(656,65): error TS2339: Property 'upperBound' does not exist on type 'Uint32Array'.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/FlameChart.js(694,31): error TS2339: Property 'keysArray' does not exist on type 'Map<string, number[]>'.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/FlameChart.js(701,13): error TS2403: Subsequent variable declarations must have the same type.  Variable 'entryIndex' must be of type 'any', but here has type 'number'.
+node_modules/chrome-devtools-frontend/front_end/perf_ui/FlameChart.js(770,68): error TS2345: Argument of type 'Calculator' is not assignable to parameter of type '{ [x: string]: any; computePosition(time: number): number; formatValue(time: number, precision?: ...'.
+  Property '_dataProvider' does not exist on type '{ [x: string]: any; computePosition(time: number): number; formatValue(time: number, precision?: ...'.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/FlameChart.js(796,43): error TS2339: Property 'peekLast' does not exist on type 'any[]'.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/FlameChart.js(805,64): error TS2345: Argument of type 'number' is not assignable to parameter of type '{ [x: string]: any; Unknown: number; Foreground: number; Background: number; Selection: number; }'.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/FlameChart.js(815,66): error TS2345: Argument of type 'number' is not assignable to parameter of type '{ [x: string]: any; Unknown: number; Foreground: number; Background: number; Selection: number; }'.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/FlameChart.js(859,67): error TS2345: Argument of type 'number' is not assignable to parameter of type '{ [x: string]: any; Unknown: number; Foreground: number; Background: number; Selection: number; }'.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/FlameChart.js(870,66): error TS2345: Argument of type 'number' is not assignable to parameter of type '{ [x: string]: any; Unknown: number; Foreground: number; Background: number; Selection: number; }'.
-node_modules/chrome-devtools-frontend/front_end/perf_ui/FlameChart.js(903,60): error TS2694: Namespace 'FlameChart' has no exported member 'Group'.
+node_modules/chrome-devtools-frontend/front_end/perf_ui/FlameChart.js(903,60): error TS2694: Namespace 'PerfUI.FlameChart' has no exported member 'Group'.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/FlameChart.js(907,17): error TS1110: Type expected.
-node_modules/chrome-devtools-frontend/front_end/perf_ui/FlameChart.js(931,33): error TS2694: Namespace 'FlameChart' has no exported member 'Group'.
-node_modules/chrome-devtools-frontend/front_end/perf_ui/FlameChart.js(940,33): error TS2694: Namespace 'FlameChart' has no exported member 'Group'.
+node_modules/chrome-devtools-frontend/front_end/perf_ui/FlameChart.js(931,33): error TS2694: Namespace 'PerfUI.FlameChart' has no exported member 'Group'.
+node_modules/chrome-devtools-frontend/front_end/perf_ui/FlameChart.js(940,33): error TS2694: Namespace 'PerfUI.FlameChart' has no exported member 'Group'.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/FlameChart.js(1027,38): error TS2339: Property 'lowerBound' does not exist on type 'any[]'.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/FlameChart.js(1167,15): error TS1110: Type expected.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/FlameChart.js(1169,70): error TS2339: Property 'peekLast' does not exist on type 'any[]'.
@@ -8889,7 +8542,7 @@ node_modules/chrome-devtools-frontend/front_end/perf_ui/FlameChart.js(1387,2): e
 node_modules/chrome-devtools-frontend/front_end/perf_ui/FlameChart.js(1393,19): error TS2339: Property 'Group' does not exist on type 'typeof FlameChart'.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/FlameChart.js(1397,2): error TS1131: Property or signature expected.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/FlameChart.js(1410,19): error TS2339: Property 'GroupStyle' does not exist on type 'typeof FlameChart'.
-node_modules/chrome-devtools-frontend/front_end/perf_ui/FlameChart.js(1420,40): error TS2694: Namespace 'FlameChart' has no exported member 'Group'.
+node_modules/chrome-devtools-frontend/front_end/perf_ui/FlameChart.js(1420,40): error TS2694: Namespace 'PerfUI.FlameChart' has no exported member 'Group'.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/FlameChart.js(1438,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/FlameChart.js(1443,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/FlameChart.js(1450,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
@@ -8919,7 +8572,7 @@ node_modules/chrome-devtools-frontend/front_end/perf_ui/LineLevelProfile.js(142,
 node_modules/chrome-devtools-frontend/front_end/perf_ui/LineLevelProfile.js(145,15): error TS2339: Property 'style' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/LineLevelProfile.js(146,18): error TS2339: Property 'setGutterDecoration' does not exist on type 'CodeMirrorTextEditor'.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/OverviewGrid.js(104,31): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/perf_ui/OverviewGrid.js(106,35): error TS2694: Namespace 'EventTarget' has no exported member 'EventDescriptor'.
+node_modules/chrome-devtools-frontend/front_end/perf_ui/OverviewGrid.js(106,35): error TS2694: Namespace 'Common.EventTarget' has no exported member 'EventDescriptor'.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/OverviewGrid.js(166,45): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/OverviewGrid.js(170,46): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/OverviewGrid.js(175,46): error TS2339: Property 'createChild' does not exist on type 'Element'.
@@ -8961,10 +8614,10 @@ node_modules/chrome-devtools-frontend/front_end/perf_ui/PieChart.js(92,18): erro
 node_modules/chrome-devtools-frontend/front_end/perf_ui/TimelineGrid.js(39,42): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/TimelineGrid.js(43,58): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/TimelineGrid.js(44,61): error TS2339: Property 'createChild' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/perf_ui/TimelineGrid.js(51,36): error TS2694: Namespace 'TimelineGrid' has no exported member 'DividersData'.
-node_modules/chrome-devtools-frontend/front_end/perf_ui/TimelineGrid.js(98,35): error TS2694: Namespace 'TimelineGrid' has no exported member 'DividersData'.
+node_modules/chrome-devtools-frontend/front_end/perf_ui/TimelineGrid.js(51,36): error TS2694: Namespace 'PerfUI.TimelineGrid' has no exported member 'DividersData'.
+node_modules/chrome-devtools-frontend/front_end/perf_ui/TimelineGrid.js(98,35): error TS2694: Namespace 'PerfUI.TimelineGrid' has no exported member 'DividersData'.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/TimelineGrid.js(104,80): error TS2345: Argument of type 'number' is not assignable to parameter of type '{ [x: string]: any; Unknown: number; Foreground: number; Background: number; Selection: number; }'.
-node_modules/chrome-devtools-frontend/front_end/perf_ui/TimelineGrid.js(119,35): error TS2694: Namespace 'TimelineGrid' has no exported member 'DividersData'.
+node_modules/chrome-devtools-frontend/front_end/perf_ui/TimelineGrid.js(119,35): error TS2694: Namespace 'PerfUI.TimelineGrid' has no exported member 'DividersData'.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/TimelineGrid.js(132,68): error TS2345: Argument of type 'number' is not assignable to parameter of type '{ [x: string]: any; Unknown: number; Foreground: number; Background: number; Selection: number; }'.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/TimelineGrid.js(135,64): error TS2345: Argument of type 'number' is not assignable to parameter of type '{ [x: string]: any; Unknown: number; Foreground: number; Background: number; Selection: number; }'.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/TimelineGrid.js(189,25): error TS2339: Property '_labelElement' does not exist on type 'Element'.
@@ -8973,7 +8626,6 @@ node_modules/chrome-devtools-frontend/front_end/perf_ui/TimelineGrid.js(199,15):
 node_modules/chrome-devtools-frontend/front_end/perf_ui/TimelineGrid.js(200,23): error TS2339: Property 'style' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/TimelineGrid.js(210,7): error TS2322: Type 'Node' is not assignable to type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/TimelineGrid.js(215,7): error TS2322: Type 'Node' is not assignable to type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/perf_ui/TimelineGrid.js(266,89): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/TimelineGrid.js(267,21): error TS2339: Property 'DividersData' does not exist on type 'typeof TimelineGrid'.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/TimelineGrid.js(277,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/TimelineGrid.js(284,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
@@ -8989,6 +8641,8 @@ node_modules/chrome-devtools-frontend/front_end/perf_ui/TimelineOverviewPane.js(
 node_modules/chrome-devtools-frontend/front_end/perf_ui/TimelineOverviewPane.js(85,14): error TS2339: Property 'appendChildren' does not exist on type 'DocumentFragment'.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/TimelineOverviewPane.js(112,30): error TS2339: Property 'offsetWidth' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/TimelineOverviewPane.js(152,7): error TS2322: Type 'Promise<void>' is not assignable to type 'Promise<undefined>'.
+node_modules/chrome-devtools-frontend/front_end/perf_ui/TimelineOverviewPane.js(162,39): error TS2345: Argument of type 'TimelineOverviewCalculator' is not assignable to parameter of type '{ [x: string]: any; computePosition(time: number): number; formatValue(time: number, precision?: ...'.
+  Property 'positionToTime' does not exist on type '{ [x: string]: any; computePosition(time: number): number; formatValue(time: number, precision?: ...'.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/TimelineOverviewPane.js(186,57): error TS2339: Property 'valuesArray' does not exist on type 'Map<any, any>'.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/TimelineOverviewPane.js(213,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/TimelineOverviewPane.js(319,19): error TS2339: Property 'preciseMillisToString' does not exist on type 'NumberConstructor'.
@@ -9000,29 +8654,13 @@ node_modules/chrome-devtools-frontend/front_end/perf_ui/TimelineOverviewPane.js(
 node_modules/chrome-devtools-frontend/front_end/perf_ui/TimelineOverviewPane.js(491,37): error TS2345: Argument of type 'symbol' is not assignable to parameter of type '{ [x: string]: any; SetExactSize: symbol; SetExactWidthMaxHeight: symbol; MeasureContent: symbol; }'.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/TimelineOverviewPane.js(495,14): error TS2339: Property 'createChild' does not exist on type 'DocumentFragment'.
 node_modules/chrome-devtools-frontend/front_end/perf_ui/TimelineOverviewPane.js(508,61): error TS2339: Property 'boxInWindow' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/performance_test_runner/TimelineTestRunner.js(10,23): error TS2339: Property 'timelinePropertyFormatters' does not exist on type 'typeof PerformanceTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/performance_test_runner/TimelineTestRunner.js(45,23): error TS2339: Property 'InvalidationFormatters' does not exist on type 'typeof PerformanceTestRunner'.
 node_modules/chrome-devtools-frontend/front_end/performance_test_runner/TimelineTestRunner.js(74,36): error TS2554: Expected 0 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/performance_test_runner/TimelineTestRunner.js(81,13): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/performance_test_runner/TimelineTestRunner.js(91,26): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
 node_modules/chrome-devtools-frontend/front_end/performance_test_runner/TimelineTestRunner.js(98,5): error TS2554: Expected 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/performance_test_runner/TimelineTestRunner.js(108,13): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
 node_modules/chrome-devtools-frontend/front_end/performance_test_runner/TimelineTestRunner.js(120,43): error TS2554: Expected 0 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/performance_test_runner/TimelineTestRunner.js(130,6): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/performance_test_runner/TimelineTestRunner.js(131,53): error TS2339: Property 'tracingManager' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/performance_test_runner/TimelineTestRunner.js(131,90): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/performance_test_runner/TimelineTestRunner.js(135,28): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/performance_test_runner/TimelineTestRunner.js(139,20): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/performance_test_runner/TimelineTestRunner.js(147,8): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
 node_modules/chrome-devtools-frontend/front_end/performance_test_runner/TimelineTestRunner.js(159,9): error TS2554: Expected 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/performance_test_runner/TimelineTestRunner.js(189,53): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
 node_modules/chrome-devtools-frontend/front_end/performance_test_runner/TimelineTestRunner.js(220,44): error TS2339: Property 'peekLast' does not exist on type 'any[]'.
-node_modules/chrome-devtools-frontend/front_end/performance_test_runner/TimelineTestRunner.js(249,54): error TS2339: Property 'timelinePropertyFormatters' does not exist on type 'typeof PerformanceTestRunner'.
 node_modules/chrome-devtools-frontend/front_end/performance_test_runner/TimelineTestRunner.js(254,19): error TS2554: Expected 2 arguments, but got 3.
-node_modules/chrome-devtools-frontend/front_end/performance_test_runner/TimelineTestRunner.js(310,93): error TS2339: Property 'InvalidationFormatters' does not exist on type 'typeof PerformanceTestRunner'.
 node_modules/chrome-devtools-frontend/front_end/performance_test_runner/TimelineTestRunner.js(321,53): error TS2345: Argument of type 'number' is not assignable to parameter of type 'V'.
-node_modules/chrome-devtools-frontend/front_end/performance_test_runner/TimelineTestRunner.js(347,23): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/performance_test_runner/TimelineTestRunner.js(355,6): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
 node_modules/chrome-devtools-frontend/front_end/persistence/Automapping.js(67,40): error TS2339: Property 'valuesArray' does not exist on type 'Set<PersistenceBinding>'.
 node_modules/chrome-devtools-frontend/front_end/persistence/Automapping.js(155,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/persistence/Automapping.js(315,20): error TS2362: The left-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type.
@@ -9035,9 +8673,11 @@ node_modules/chrome-devtools-frontend/front_end/persistence/DefaultMapping.js(36
 node_modules/chrome-devtools-frontend/front_end/persistence/DefaultMapping.js(46,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/persistence/DefaultMapping.js(54,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/persistence/DefaultMapping.js(62,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/persistence/DefaultMapping.js(106,24): error TS2339: Property 'addEventListener' does not exist on type 'UISourceCode'.
 node_modules/chrome-devtools-frontend/front_end/persistence/DefaultMapping.js(130,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/persistence/DefaultMapping.js(143,40): error TS2339: Property 'valuesArray' does not exist on type 'Set<PersistenceBinding>'.
+node_modules/chrome-devtools-frontend/front_end/persistence/EditFileSystemView.js(56,46): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; renderItem(item: T, editable: boolean): Element; removeItemRequested(item: T,...'.
+  Type 'EditFileSystemView' is not assignable to type '{ [x: string]: any; renderItem(item: T, editable: boolean): Element; removeItemRequested(item: T,...'.
+    Property '_fileSystemPath' does not exist on type '{ [x: string]: any; renderItem(item: T, editable: boolean): Element; removeItemRequested(item: T,...'.
 node_modules/chrome-devtools-frontend/front_end/persistence/EditFileSystemView.js(60,48): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/persistence/EditFileSystemView.js(61,82): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/persistence/EditFileSystemView.js(62,41): error TS2555: Expected at least 2 arguments, but got 1.
@@ -9045,6 +8685,7 @@ node_modules/chrome-devtools-frontend/front_end/persistence/EditFileSystemView.j
 node_modules/chrome-devtools-frontend/front_end/persistence/EditFileSystemView.js(69,53): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/persistence/EditFileSystemView.js(71,9): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/persistence/EditFileSystemView.js(73,29): error TS2555: Expected at least 2 arguments, but got 1.
+node_modules/chrome-devtools-frontend/front_end/persistence/EditFileSystemView.js(74,51): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; renderItem(item: T, editable: boolean): Element; removeItemRequested(item: T,...'.
 node_modules/chrome-devtools-frontend/front_end/persistence/EditFileSystemView.js(78,46): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/persistence/EditFileSystemView.js(82,25): error TS2339: Property 'tabIndex' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/persistence/EditFileSystemView.js(135,38): error TS2339: Property 'createChild' does not exist on type 'Element'.
@@ -9060,18 +8701,22 @@ node_modules/chrome-devtools-frontend/front_end/persistence/EditFileSystemView.j
 node_modules/chrome-devtools-frontend/front_end/persistence/EditFileSystemView.js(285,26): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/persistence/FileSystemMapping.js(65,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/persistence/FileSystemMapping.js(73,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/persistence/FileSystemMapping.js(180,46): error TS2339: Property 'remove' does not exist on type 'Entry[]'.
-node_modules/chrome-devtools-frontend/front_end/persistence/FileSystemMapping.js(285,52): error TS2339: Property 'remove' does not exist on type 'Entry[]'.
 node_modules/chrome-devtools-frontend/front_end/persistence/FileSystemWorkspaceBinding.js(134,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/persistence/FileSystemWorkspaceBinding.js(150,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/persistence/FileSystemWorkspaceBinding.js(156,28): error TS2339: Property 'remove' does not exist on type 'Map<string, FileSystem>'.
 node_modules/chrome-devtools-frontend/front_end/persistence/FileSystemWorkspaceBinding.js(160,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/persistence/FileSystemWorkspaceBinding.js(163,67): error TS2694: Namespace 'IsolatedFileSystemManager' has no exported member 'FilesChangedData'.
+node_modules/chrome-devtools-frontend/front_end/persistence/FileSystemWorkspaceBinding.js(163,67): error TS2694: Namespace 'Persistence.IsolatedFileSystemManager' has no exported member 'FilesChangedData'.
 node_modules/chrome-devtools-frontend/front_end/persistence/FileSystemWorkspaceBinding.js(190,30): error TS2339: Property 'remove' does not exist on type 'Map<string, FileSystem>'.
 node_modules/chrome-devtools-frontend/front_end/persistence/FileSystemWorkspaceBinding.js(222,26): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Debugger: string; Formatter: string; Network: string; Snippets: string; FileS...'.
+node_modules/chrome-devtools-frontend/front_end/persistence/FileSystemWorkspaceBinding.js(232,26): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; workspace(): Workspace; id(): string; type(): string; isServiceProject(): boo...'.
+  Type 'FileSystem' is not assignable to type '{ [x: string]: any; workspace(): Workspace; id(): string; type(): string; isServiceProject(): boo...'.
+    Property '_fileSystem' does not exist on type '{ [x: string]: any; workspace(): Workspace; id(): string; type(): string; isServiceProject(): boo...'.
 node_modules/chrome-devtools-frontend/front_end/persistence/FileSystemWorkspaceBinding.js(432,23): error TS2339: Property 'intersectOrdered' does not exist on type 'string[]'.
 node_modules/chrome-devtools-frontend/front_end/persistence/FileSystemWorkspaceBinding.js(432,61): error TS2339: Property 'naturalOrderComparator' does not exist on type 'StringConstructor'.
-node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystem.js(68,25): error TS2554: Expected 0-1 arguments, but got 2.
+node_modules/chrome-devtools-frontend/front_end/persistence/FileSystemWorkspaceBinding.js(500,76): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; workspace(): Workspace; id(): string; type(): string; isServiceProject(): boo...'.
+  Type 'FileSystem' is not assignable to type '{ [x: string]: any; workspace(): Workspace; id(): string; type(): string; isServiceProject(): boo...'.
+    Property '_fileSystem' does not exist on type '{ [x: string]: any; workspace(): Workspace; id(): string; type(): string; isServiceProject(): boo...'.
+node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystem.js(68,47): error TS2339: Property 'isolatedFileSystem' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystem.js(75,10): error TS2339: Property 'catchException' does not exist on type 'Promise<IsolatedFileSystem>'.
 node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystem.js(83,59): error TS2339: Property 'message' does not exist on type 'DOMError'.
 node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystem.js(97,17): error TS2304: Cannot find name 'FileEntry'.
@@ -9084,6 +8729,8 @@ node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystem.j
 node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystem.js(239,27): error TS2304: Cannot find name 'FileEntry'.
 node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystem.js(267,17): error TS2304: Cannot find name 'FileEntry'.
 node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystem.js(278,17): error TS2304: Cannot find name 'FileError'.
+node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystem.js(344,31): error TS2345: Argument of type 'string | ArrayBuffer' is not assignable to parameter of type 'string'.
+  Type 'ArrayBuffer' is not assignable to type 'string'.
 node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystem.js(360,34): error TS2345: Argument of type 'number' is not assignable to parameter of type '{ [x: string]: any; WindowDocked: number; WindowUndocked: number; ScriptsBreakpointSet: number; T...'.
 node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystem.js(364,17): error TS2304: Cannot find name 'FileEntry'.
 node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystem.js(372,17): error TS2304: Cannot find name 'FileWriter'.
@@ -9097,44 +8744,43 @@ node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystem.j
 node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystem.js(513,17): error TS2304: Cannot find name 'DirectoryEntry'.
 node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystem.js(529,54): error TS2339: Property 'valuesArray' does not exist on type 'Set<string>'.
 node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystem.js(564,70): error TS2339: Property 'asRegExp' does not exist on type 'Setting<any>'.
-node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystem.js(583,29): error TS2339: Property 'searchInPath' does not exist on type 'typeof InspectorFrontendHost'.
-node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystem.js(601,27): error TS2339: Property 'indexPath' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystem.js(583,29): error TS2339: Property 'searchInPath' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystem.js(601,27): error TS2339: Property 'indexPath' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystemManager.js(40,29): error TS1005: '>' expected.
-node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystemManager.js(75,27): error TS2339: Property 'requestFileSystems' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystemManager.js(45,27): error TS2551: Property 'events' does not exist on type 'typeof InspectorFrontendHostAPI'. Did you mean 'Events'?
+node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystemManager.js(47,27): error TS2551: Property 'events' does not exist on type 'typeof InspectorFrontendHostAPI'. Did you mean 'Events'?
+node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystemManager.js(49,27): error TS2551: Property 'events' does not exist on type 'typeof InspectorFrontendHostAPI'. Did you mean 'Events'?
+node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystemManager.js(51,27): error TS2551: Property 'events' does not exist on type 'typeof InspectorFrontendHostAPI'. Did you mean 'Events'?
+node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystemManager.js(53,27): error TS2551: Property 'events' does not exist on type 'typeof InspectorFrontendHostAPI'. Did you mean 'Events'?
+node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystemManager.js(55,27): error TS2551: Property 'events' does not exist on type 'typeof InspectorFrontendHostAPI'. Did you mean 'Events'?
+node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystemManager.js(57,27): error TS2551: Property 'events' does not exist on type 'typeof InspectorFrontendHostAPI'. Did you mean 'Events'?
+node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystemManager.js(73,27): error TS2551: Property 'events' does not exist on type 'typeof InspectorFrontendHostAPI'. Did you mean 'Events'?
+node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystemManager.js(75,27): error TS2339: Property 'requestFileSystems' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystemManager.js(79,24): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystemManager.js(83,83): error TS2694: Namespace 'IsolatedFileSystemManager' has no exported member 'FileSystem'.
-node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystemManager.js(105,29): error TS2339: Property 'addFileSystem' does not exist on type 'typeof InspectorFrontendHost'.
-node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystemManager.js(113,27): error TS2339: Property 'removeFileSystem' does not exist on type 'typeof InspectorFrontendHost'.
-node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystemManager.js(124,53): error TS2694: Namespace 'IsolatedFileSystemManager' has no exported member 'FileSystem'.
+node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystemManager.js(83,83): error TS2694: Namespace 'Persistence.IsolatedFileSystemManager' has no exported member 'FileSystem'.
+node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystemManager.js(105,29): error TS2339: Property 'addFileSystem' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystemManager.js(113,27): error TS2339: Property 'removeFileSystem' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystemManager.js(124,53): error TS2694: Namespace 'Persistence.IsolatedFileSystemManager' has no exported member 'FileSystem'.
 node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystemManager.js(150,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystemManager.js(154,72): error TS2694: Namespace 'IsolatedFileSystemManager' has no exported member 'FileSystem'.
+node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystemManager.js(154,72): error TS2694: Namespace 'Persistence.IsolatedFileSystemManager' has no exported member 'FileSystem'.
 node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystemManager.js(171,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystemManager.js(185,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystemManager.js(211,37): error TS2345: Argument of type 'string' is not assignable to parameter of type 'V'.
 node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystemManager.js(222,30): error TS2339: Property 'valuesArray' does not exist on type 'Map<string, IsolatedFileSystem>'.
 node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystemManager.js(284,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystemManager.js(297,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystemManager.js(308,29): error TS2339: Property 'stopIndexing' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystemManager.js(308,29): error TS2339: Property 'stopIndexing' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystemManager.js(314,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystemManager.js(327,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystemManager.js(341,97): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystemManager.js(342,39): error TS2339: Property 'FileSystem' does not exist on type 'typeof IsolatedFileSystemManager'.
-node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystemManager.js(344,121): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/persistence/IsolatedFileSystemManager.js(345,39): error TS2339: Property 'FilesChangedData' does not exist on type 'typeof IsolatedFileSystemManager'.
-node_modules/chrome-devtools-frontend/front_end/persistence/NetworkPersistenceManager.js(40,43): error TS2694: Namespace 'EventTarget' has no exported member 'EventDescriptor'.
+node_modules/chrome-devtools-frontend/front_end/persistence/NetworkPersistenceManager.js(40,43): error TS2694: Namespace 'Common.EventTarget' has no exported member 'EventDescriptor'.
 node_modules/chrome-devtools-frontend/front_end/persistence/NetworkPersistenceManager.js(140,55): error TS2339: Property 'hashCode' does not exist on type 'StringConstructor'.
-node_modules/chrome-devtools-frontend/front_end/persistence/NetworkPersistenceManager.js(341,70): error TS2339: Property 'Network' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/persistence/Persistence.js(21,51): error TS1005: '>' expected.
+node_modules/chrome-devtools-frontend/front_end/persistence/Persistence.js(26,45): error TS2345: Argument of type 'LinkDecorator' is not assignable to parameter of type '{ [x: string]: any; linkIcon(uiSourceCode: UISourceCode): Icon; }'.
+  Property '_bindingChanged' does not exist on type '{ [x: string]: any; linkIcon(uiSourceCode: UISourceCode): Icon; }'.
 node_modules/chrome-devtools-frontend/front_end/persistence/Persistence.js(58,23): error TS1138: Parameter declaration expected.
 node_modules/chrome-devtools-frontend/front_end/persistence/Persistence.js(58,23): error TS8024: JSDoc '@param' tag has name 'function', but there is no parameter with that name.
-node_modules/chrome-devtools-frontend/front_end/persistence/Persistence.js(119,21): error TS2339: Property 'addEventListener' does not exist on type 'UISourceCode'.
-node_modules/chrome-devtools-frontend/front_end/persistence/Persistence.js(121,24): error TS2339: Property 'addEventListener' does not exist on type 'UISourceCode'.
-node_modules/chrome-devtools-frontend/front_end/persistence/Persistence.js(123,21): error TS2339: Property 'addEventListener' does not exist on type 'UISourceCode'.
-node_modules/chrome-devtools-frontend/front_end/persistence/Persistence.js(125,24): error TS2339: Property 'addEventListener' does not exist on type 'UISourceCode'.
-node_modules/chrome-devtools-frontend/front_end/persistence/Persistence.js(151,21): error TS2339: Property 'removeEventListener' does not exist on type 'UISourceCode'.
-node_modules/chrome-devtools-frontend/front_end/persistence/Persistence.js(153,24): error TS2339: Property 'removeEventListener' does not exist on type 'UISourceCode'.
-node_modules/chrome-devtools-frontend/front_end/persistence/Persistence.js(155,21): error TS2339: Property 'removeEventListener' does not exist on type 'UISourceCode'.
-node_modules/chrome-devtools-frontend/front_end/persistence/Persistence.js(157,24): error TS2339: Property 'removeEventListener' does not exist on type 'UISourceCode'.
 node_modules/chrome-devtools-frontend/front_end/persistence/Persistence.js(176,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/persistence/Persistence.js(218,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/persistence/Persistence.js(326,43): error TS2339: Property 'set' does not exist on type 'Multimap'.
@@ -9143,7 +8789,7 @@ node_modules/chrome-devtools-frontend/front_end/persistence/Persistence.js(341,4
 node_modules/chrome-devtools-frontend/front_end/persistence/Persistence.js(343,70): error TS2339: Property 'get' does not exist on type 'Multimap'.
 node_modules/chrome-devtools-frontend/front_end/persistence/PersistenceActions.js(30,44): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/persistence/PersistenceActions.js(34,9): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/persistence/PersistenceActions.js(34,83): error TS2339: Property 'showItemInFolder' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/persistence/PersistenceActions.js(34,83): error TS2339: Property 'showItemInFolder' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/persistence/PersistenceActions.js(39,44): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/persistence/PersistenceUtils.js(49,1): error TS8022: JSDoc '@extends' is not attached to a class.
 node_modules/chrome-devtools-frontend/front_end/persistence/PersistenceUtils.js(60,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
@@ -9162,7 +8808,6 @@ node_modules/chrome-devtools-frontend/front_end/persistence/WorkspaceSettingsTab
 node_modules/chrome-devtools-frontend/front_end/persistence/WorkspaceSettingsTab.js(122,31): error TS2345: Argument of type 'ToolbarButton' is not assignable to parameter of type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
   Type 'ToolbarButton' is not assignable to type '{ [x: string]: any; item(): any & any; }'.
 node_modules/chrome-devtools-frontend/front_end/platform/utilities.js(30,30): error TS2304: Cannot find name 'Arguments'.
-node_modules/chrome-devtools-frontend/front_end/platform/utilities.js(30,58): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/platform/utilities.js(31,5): error TS2300: Duplicate identifier 'ArrayLike'.
 node_modules/chrome-devtools-frontend/front_end/platform/utilities.js(46,18): error TS2339: Property 'findAll' does not exist on type 'String'.
 node_modules/chrome-devtools-frontend/front_end/platform/utilities.js(59,18): error TS2339: Property 'reverse' does not exist on type 'String'.
@@ -9272,11 +8917,10 @@ node_modules/chrome-devtools-frontend/front_end/product_registry/BadgePool.js(17
 node_modules/chrome-devtools-frontend/front_end/product_registry/ProductRegistry.js(8,24): error TS2339: Property 'runtime' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/product_registry/ProductRegistry.js(11,31): error TS2339: Property 'singleton' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/product_registry/ProductRegistry.js(22,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
-node_modules/chrome-devtools-frontend/front_end/product_registry/ProductRegistry.js(28,41): error TS2694: Namespace 'Registry' has no exported member 'ProductEntry'.
+node_modules/chrome-devtools-frontend/front_end/product_registry/ProductRegistry.js(28,41): error TS2694: Namespace 'ProductRegistry.Registry' has no exported member 'ProductEntry'.
 node_modules/chrome-devtools-frontend/front_end/product_registry/ProductRegistry.js(34,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
-node_modules/chrome-devtools-frontend/front_end/product_registry/ProductRegistry.js(55,41): error TS2694: Namespace 'Registry' has no exported member 'ProductEntry'.
-node_modules/chrome-devtools-frontend/front_end/product_registry/ProductRegistry.js(71,47): error TS1003: Identifier expected.
-node_modules/chrome-devtools-frontend/front_end/product_registry/ProductRegistry.js(72,26): error TS2339: Property 'ProductEntry' does not exist on type '() => void'.
+node_modules/chrome-devtools-frontend/front_end/product_registry/ProductRegistry.js(55,41): error TS2694: Namespace 'ProductRegistry.Registry' has no exported member 'ProductEntry'.
+node_modules/chrome-devtools-frontend/front_end/product_registry/ProductRegistry.js(72,26): error TS2339: Property 'ProductEntry' does not exist on type '{ (): void; prototype: { [x: string]: any; }; }'.
 node_modules/chrome-devtools-frontend/front_end/product_registry_impl/ProductRegistryData.js(1488,1): error TS2345: Argument of type '({ "hash": string; "prefixes": { "": { "product": number; "type": number; }; }; } | { "hash": str...' is not assignable to parameter of type '{ hash: string; prefixes: { [x: string]: { product: number; type: number; }; }; }[]'.
   Type '{ "hash": string; "prefixes": { "": { "product": number; "type": number; }; }; } | { "hash": stri...' is not assignable to type '{ hash: string; prefixes: { [x: string]: { product: number; type: number; }; }; }'.
     Type '{ "hash": string; "prefixes": { "": { "product": number; }; }; }' is not assignable to type '{ hash: string; prefixes: { [x: string]: { product: number; type: number; }; }; }'.
@@ -9285,8 +8929,8 @@ node_modules/chrome-devtools-frontend/front_end/product_registry_impl/ProductReg
           Property '""' is incompatible with index signature.
             Type '{ "product": number; }' is not assignable to type '{ product: number; type: number; }'.
               Property 'type' is missing in type '{ "product": number; }'.
-node_modules/chrome-devtools-frontend/front_end/product_registry_impl/ProductRegistryImpl.js(27,41): error TS2694: Namespace 'Registry' has no exported member 'ProductEntry'.
-node_modules/chrome-devtools-frontend/front_end/product_registry_impl/ProductRegistryImpl.js(103,67): error TS2694: Namespace 'Registry' has no exported member 'ProductEntry'.
+node_modules/chrome-devtools-frontend/front_end/product_registry_impl/ProductRegistryImpl.js(27,41): error TS2694: Namespace 'ProductRegistry.Registry' has no exported member 'ProductEntry'.
+node_modules/chrome-devtools-frontend/front_end/product_registry_impl/ProductRegistryImpl.js(103,67): error TS2694: Namespace 'ProductRegistry.Registry' has no exported member 'ProductEntry'.
 node_modules/chrome-devtools-frontend/front_end/profiler/BottomUpProfileDataGrid.js(68,9): error TS2322: Type 'BottomUpProfileDataGridNode' is not assignable to type '{ [x: string]: any; formatValue(value: number, node: any & any): string; formatPercent(value: num...'.
   Type 'BottomUpProfileDataGridNode' is not assignable to type '{ [x: string]: any; formatValue(value: number, node: any & any): string; formatPercent(value: num...'.
 node_modules/chrome-devtools-frontend/front_end/profiler/BottomUpProfileDataGrid.js(68,9): error TS2322: Type 'BottomUpProfileDataGridNode' is not assignable to type '{ [x: string]: any; formatValue(value: number, node: any & any): string; formatPercent(value: num...'.
@@ -9308,16 +8952,22 @@ node_modules/chrome-devtools-frontend/front_end/profiler/CPUProfileFlameChart.js
 node_modules/chrome-devtools-frontend/front_end/profiler/CPUProfileFlameChart.js(130,21): error TS2339: Property '_entryNodes' does not exist on type 'ProfileFlameChartDataProvider'.
 node_modules/chrome-devtools-frontend/front_end/profiler/CPUProfileFlameChart.js(144,23): error TS2339: Property '_entryNodes' does not exist on type 'ProfileFlameChartDataProvider'.
 node_modules/chrome-devtools-frontend/front_end/profiler/CPUProfileFlameChart.js(154,21): error TS2339: Property '_entryNodes' does not exist on type 'ProfileFlameChartDataProvider'.
+node_modules/chrome-devtools-frontend/front_end/profiler/CPUProfileFlameChart.js(212,58): error TS2345: Argument of type 'OverviewPane' is not assignable to parameter of type '{ [x: string]: any; requestWindowTimes(startTime: number, endTime: number): void; updateRangeSele...'.
+  Property '_overviewContainer' does not exist on type '{ [x: string]: any; requestWindowTimes(startTime: number, endTime: number): void; updateRangeSele...'.
 node_modules/chrome-devtools-frontend/front_end/profiler/CPUProfileFlameChart.js(231,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/profiler/CPUProfileFlameChart.js(248,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/profiler/CPUProfileFlameChart.js(414,44): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/profiler/CPUProfileFlameChart.js(452,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/profiler/CPUProfileFlameChart.js(481,40): error TS2339: Property 'window' does not exist on type 'Element'.
+node_modules/chrome-devtools-frontend/front_end/profiler/CPUProfileFlameChart.js(492,39): error TS2345: Argument of type 'OverviewCalculator' is not assignable to parameter of type '{ [x: string]: any; computePosition(time: number): number; formatValue(time: number, precision?: ...'.
+  Property '_dataProvider' does not exist on type '{ [x: string]: any; computePosition(time: number): number; formatValue(time: number, precision?: ...'.
+node_modules/chrome-devtools-frontend/front_end/profiler/CPUProfileView.js(40,21): error TS2345: Argument of type 'NodeFormatter' is not assignable to parameter of type '{ [x: string]: any; formatValue(value: number, node: any & any): string; formatPercent(value: num...'.
+  Property '_profileView' does not exist on type '{ [x: string]: any; formatValue(value: number, node: any & any): string; formatPercent(value: num...'.
 node_modules/chrome-devtools-frontend/front_end/profiler/CPUProfileView.js(61,16): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/profiler/CPUProfileView.js(63,16): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/profiler/CPUProfileView.js(73,5): error TS2322: Type 'CPUFlameChartDataProvider' is not assignable to type '{ [x: string]: any; minimumBoundary(): number; totalTime(): number; formatValue(value: number, pr...'.
 node_modules/chrome-devtools-frontend/front_end/profiler/CPUProfileView.js(73,5): error TS2322: Type 'CPUFlameChartDataProvider' is not assignable to type '{ [x: string]: any; minimumBoundary(): number; totalTime(): number; formatValue(value: number, pr...'.
   Property '_cpuProfile' does not exist on type '{ [x: string]: any; minimumBoundary(): number; totalTime(): number; formatValue(value: number, pr...'.
+node_modules/chrome-devtools-frontend/front_end/profiler/CPUProfileView.js(73,5): error TS2322: Type 'CPUFlameChartDataProvider' is not assignable to type '{ [x: string]: any; minimumBoundary(): number; totalTime(): number; formatValue(value: number, pr...'.
 node_modules/chrome-devtools-frontend/front_end/profiler/CPUProfileView.js(82,43): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/profiler/CPUProfileView.js(85,29): error TS2339: Property 'instance' does not exist on type 'typeof CPUProfileType'.
 node_modules/chrome-devtools-frontend/front_end/profiler/CPUProfileView.js(115,30): error TS2555: Expected at least 2 arguments, but got 1.
@@ -9325,7 +8975,7 @@ node_modules/chrome-devtools-frontend/front_end/profiler/CPUProfileView.js(115,7
 node_modules/chrome-devtools-frontend/front_end/profiler/CPUProfileView.js(133,12): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/profiler/CPUProfileView.js(137,12): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/profiler/CPUProfileView.js(141,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/profiler/CPUProfileView.js(144,49): error TS2694: Namespace 'CPUProfilerModel' has no exported member 'EventData'.
+node_modules/chrome-devtools-frontend/front_end/profiler/CPUProfileView.js(144,49): error TS2694: Namespace 'SDK.CPUProfilerModel' has no exported member 'EventData'.
 node_modules/chrome-devtools-frontend/front_end/profiler/CPUProfileView.js(145,43): error TS2694: Namespace 'Protocol' has no exported member 'Profiler'.
 node_modules/chrome-devtools-frontend/front_end/profiler/CPUProfileView.js(159,26): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/profiler/CPUProfileView.js(162,34): error TS2345: Argument of type 'number' is not assignable to parameter of type '{ [x: string]: any; WindowDocked: number; WindowUndocked: number; ScriptsBreakpointSet: number; T...'.
@@ -9344,11 +8994,13 @@ node_modules/chrome-devtools-frontend/front_end/profiler/CPUProfileView.js(404,7
 node_modules/chrome-devtools-frontend/front_end/profiler/CPUProfileView.js(405,22): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/profiler/CPUProfileView.js(405,71): error TS2339: Property 'secondsToString' does not exist on type 'NumberConstructor'.
 node_modules/chrome-devtools-frontend/front_end/profiler/CPUProfileView.js(407,24): error TS2555: Expected at least 2 arguments, but got 1.
+node_modules/chrome-devtools-frontend/front_end/profiler/HeapProfileView.js(20,21): error TS2345: Argument of type 'NodeFormatter' is not assignable to parameter of type '{ [x: string]: any; formatValue(value: number, node: any & any): string; formatPercent(value: num...'.
+  Property '_profileView' does not exist on type '{ [x: string]: any; formatValue(value: number, node: any & any): string; formatPercent(value: num...'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapProfileView.js(31,16): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapProfileView.js(33,16): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapProfileView.js(43,5): error TS2322: Type 'HeapFlameChartDataProvider' is not assignable to type '{ [x: string]: any; minimumBoundary(): number; totalTime(): number; formatValue(value: number, pr...'.
-  Property '_profile' does not exist on type '{ [x: string]: any; minimumBoundary(): number; totalTime(): number; formatValue(value: number, pr...'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapProfileView.js(43,5): error TS2322: Type 'HeapFlameChartDataProvider' is not assignable to type '{ [x: string]: any; minimumBoundary(): number; totalTime(): number; formatValue(value: number, pr...'.
+  Property '_profile' does not exist on type '{ [x: string]: any; minimumBoundary(): number; totalTime(): number; formatValue(value: number, pr...'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapProfileView.js(52,52): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapProfileView.js(54,38): error TS2339: Property 'instance' does not exist on type 'typeof SamplingHeapProfileType'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapProfileView.js(82,30): error TS2555: Expected at least 2 arguments, but got 1.
@@ -9383,16 +9035,16 @@ node_modules/chrome-devtools-frontend/front_end/profiler/HeapProfilerPanel.js(10
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.js(34,41): error TS2417: Class static side 'typeof HeapSnapshotSortableDataGrid' incorrectly extends base class static side 'typeof DataGrid'.
   Types of property 'Events' are incompatible.
     Type '{ [x: string]: any; ContentShown: symbol; SortingComplete: symbol; }' is not assignable to type '{ [x: string]: any; SelectedNode: symbol; DeselectedNode: symbol; OpenedNode: symbol; SortingChan...'.
+      Property 'SelectedNode' is missing in type '{ [x: string]: any; ContentShown: symbol; SortingComplete: symbol; }'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.js(34,41): error TS2417: Class static side 'typeof HeapSnapshotSortableDataGrid' incorrectly extends base class static side 'typeof DataGrid'.
   Types of property 'Events' are incompatible.
     Type '{ [x: string]: any; ContentShown: symbol; SortingComplete: symbol; }' is not assignable to type '{ [x: string]: any; SelectedNode: symbol; DeselectedNode: symbol; OpenedNode: symbol; SortingChan...'.
-      Property 'SelectedNode' is missing in type '{ [x: string]: any; ContentShown: symbol; SortingComplete: symbol; }'.
-node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.js(37,41): error TS2694: Namespace 'DataGrid' has no exported member 'ColumnDescriptor'.
+node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.js(37,41): error TS2694: Namespace 'DataGrid.DataGrid' has no exported member 'ColumnDescriptor'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.js(124,27): error TS2339: Property 'enclosingNodeOrSelfWithNodeName' does not exist on type 'EventTarget'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.js(137,46): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.js(153,24): error TS2694: Namespace 'Protocol' has no exported member 'HeapProfiler'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.js(191,27): error TS2339: Property '_sortFields' does not exist on type 'HeapSnapshotSortableDataGrid'.
-node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.js(295,41): error TS2694: Namespace 'DataGrid' has no exported member 'ColumnDescriptor'.
+node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.js(295,41): error TS2694: Namespace 'DataGrid.DataGrid' has no exported member 'ColumnDescriptor'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.js(329,72): error TS2339: Property 'offsetHeight' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.js(394,41): error TS2345: Argument of type '{ [x: string]: any; dispose(): void; nodePosition(snapshotObjectId: number): Promise<number>; isE...' is not assignable to parameter of type 'DataGridNode<any>'.
   Property '_element' is missing in type '{ [x: string]: any; dispose(): void; nodePosition(snapshotObjectId: number): Promise<number>; isE...'.
@@ -9408,8 +9060,8 @@ node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.j
     Property 'dispose' is missing in type 'DataGridNode<any>'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.js(522,27): error TS2339: Property 'offsetTop' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.js(523,40): error TS2339: Property 'offsetHeight' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.js(554,41): error TS2694: Namespace 'DataGrid' has no exported member 'ColumnDescriptor'.
-node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.js(558,58): error TS2694: Namespace 'DataGrid' has no exported member 'ColumnDescriptor'.
+node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.js(554,41): error TS2694: Namespace 'DataGrid.DataGrid' has no exported member 'ColumnDescriptor'.
+node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.js(558,58): error TS2694: Namespace 'DataGrid.DataGrid' has no exported member 'ColumnDescriptor'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.js(559,33): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.js(560,35): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.js(561,38): error TS2555: Expected at least 2 arguments, but got 1.
@@ -9421,12 +9073,12 @@ node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.j
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.js(603,43): error TS2417: Class static side 'typeof HeapSnapshotRetainmentDataGrid' incorrectly extends base class static side 'typeof HeapSnapshotContainmentDataGrid'.
   Types of property 'Events' are incompatible.
     Type '{ [x: string]: any; ExpandRetainersComplete: symbol; }' is not assignable to type '{ [x: string]: any; ContentShown: symbol; SortingComplete: symbol; }'.
-node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.js(608,56): error TS2694: Namespace 'DataGrid' has no exported member 'ColumnDescriptor'.
+node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.js(608,56): error TS2694: Namespace 'DataGrid.DataGrid' has no exported member 'ColumnDescriptor'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.js(609,29): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.js(611,16): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.js(617,34): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.js(618,35): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.js(669,56): error TS2694: Namespace 'DataGrid' has no exported member 'ColumnDescriptor'.
+node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.js(669,56): error TS2694: Namespace 'DataGrid.DataGrid' has no exported member 'ColumnDescriptor'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.js(670,29): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.js(671,31): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.js(672,28): error TS2555: Expected at least 2 arguments, but got 1.
@@ -9436,7 +9088,7 @@ node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.j
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.js(776,11): error TS2345: Argument of type 'HeapSnapshotConstructorNode' is not assignable to parameter of type '{ [x: string]: any; dispose(): void; nodePosition(snapshotObjectId: number): Promise<number>; isE...'.
   Type 'HeapSnapshotConstructorNode' is not assignable to type '{ [x: string]: any; dispose(): void; nodePosition(snapshotObjectId: number): Promise<number>; isE...'.
     Property 'nodePosition' is missing in type 'HeapSnapshotConstructorNode'.
-node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.js(822,56): error TS2694: Namespace 'DataGrid' has no exported member 'ColumnDescriptor'.
+node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.js(822,56): error TS2694: Namespace 'DataGrid.DataGrid' has no exported member 'ColumnDescriptor'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.js(823,29): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.js(824,33): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.js(825,35): error TS2555: Expected at least 2 arguments, but got 1.
@@ -9447,7 +9099,7 @@ node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.j
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.js(887,40): error TS2345: Argument of type 'HeapSnapshotDiffNode' is not assignable to parameter of type '{ [x: string]: any; dispose(): void; nodePosition(snapshotObjectId: number): Promise<number>; isE...'.
   Type 'HeapSnapshotDiffNode' is not assignable to type '{ [x: string]: any; dispose(): void; nodePosition(snapshotObjectId: number): Promise<number>; isE...'.
     Property 'nodePosition' is missing in type 'HeapSnapshotDiffNode'.
-node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.js(902,56): error TS2694: Namespace 'DataGrid' has no exported member 'ColumnDescriptor'.
+node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.js(902,56): error TS2694: Namespace 'DataGrid.DataGrid' has no exported member 'ColumnDescriptor'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.js(903,32): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.js(904,28): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotDataGrids.js(905,31): error TS2555: Expected at least 2 arguments, but got 1.
@@ -9461,12 +9113,11 @@ node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotGridNodes.j
     Type 'string' is not comparable to type 'boolean'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotGridNodes.js(104,14): error TS2339: Property '_searchMatched' does not exist on type 'HeapSnapshotGridNode'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotGridNodes.js(137,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
-node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotGridNodes.js(155,48): error TS2339: Property 'baseSystemDistance' does not exist on type 'typeof HeapSnapshotModel'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotGridNodes.js(156,95): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotGridNodes.js(163,5): error TS2322: Type '({ [x: string]: any; dispose(): void; nodePosition(snapshotObjectId: number): Promise<number>; is...' is not assignable to type 'DataGridNode<any>[]'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotGridNodes.js(163,5): error TS2322: Type '({ [x: string]: any; dispose(): void; nodePosition(snapshotObjectId: number): Promise<number>; is...' is not assignable to type 'DataGridNode<any>[]'.
   Type '{ [x: string]: any; dispose(): void; nodePosition(snapshotObjectId: number): Promise<number>; isE...' is not assignable to type 'DataGridNode<any>'.
     Property '_element' is missing in type '{ [x: string]: any; dispose(): void; nodePosition(snapshotObjectId: number): Promise<number>; isE...'.
+node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotGridNodes.js(163,5): error TS2322: Type '({ [x: string]: any; dispose(): void; nodePosition(snapshotObjectId: number): Promise<number>; is...' is not assignable to type 'DataGridNode<any>[]'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotGridNodes.js(170,39): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; dispose(): void; nodePosition(snapshotObjectId: number): Promise<number>; isE...'.
   Type 'HeapSnapshotGridNode' is not assignable to type '{ [x: string]: any; dispose(): void; nodePosition(snapshotObjectId: number): Promise<number>; isE...'.
     Type 'HeapSnapshotGridNode' is not assignable to type '{ [x: string]: any; dispose(): void; nodePosition(snapshotObjectId: number): Promise<number>; isE...'.
@@ -9508,22 +9159,21 @@ node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotGridNodes.j
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotGridNodes.js(874,34): error TS2339: Property 'withThousandsSeparator' does not exist on type 'NumberConstructor'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotGridNodes.js(892,3): error TS2416: Property 'createProvider' in type 'HeapSnapshotInstanceNode' is not assignable to the same property in base type 'HeapSnapshotGenericObjectNode'.
   Type '() => HeapSnapshotProviderProxy' is not assignable to type '() => { [x: string]: any; dispose(): void; nodePosition(snapshotObjectId: number): Promise<number...'.
-    Type 'HeapSnapshotProviderProxy' is not assignable to type '{ [x: string]: any; dispose(): void; nodePosition(snapshotObjectId: number): Promise<number>; isE...'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotGridNodes.js(892,3): error TS2416: Property 'createProvider' in type 'HeapSnapshotInstanceNode' is not assignable to the same property in base type 'HeapSnapshotGenericObjectNode'.
   Type '() => HeapSnapshotProviderProxy' is not assignable to type '() => { [x: string]: any; dispose(): void; nodePosition(snapshotObjectId: number): Promise<number...'.
+    Type 'HeapSnapshotProviderProxy' is not assignable to type '{ [x: string]: any; dispose(): void; nodePosition(snapshotObjectId: number): Promise<number>; isE...'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotGridNodes.js(966,23): error TS2339: Property 'withThousandsSeparator' does not exist on type 'NumberConstructor'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotGridNodes.js(968,29): error TS2339: Property 'withThousandsSeparator' does not exist on type 'NumberConstructor'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotGridNodes.js(969,30): error TS2339: Property 'withThousandsSeparator' does not exist on type 'NumberConstructor'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotGridNodes.js(980,3): error TS2416: Property 'createProvider' in type 'HeapSnapshotConstructorNode' is not assignable to the same property in base type 'HeapSnapshotGridNode'.
   Type '() => HeapSnapshotProviderProxy' is not assignable to type '() => { [x: string]: any; dispose(): void; nodePosition(snapshotObjectId: number): Promise<number...'.
+    Type 'HeapSnapshotProviderProxy' is not assignable to type '{ [x: string]: any; dispose(): void; nodePosition(snapshotObjectId: number): Promise<number>; isE...'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotGridNodes.js(980,3): error TS2416: Property 'createProvider' in type 'HeapSnapshotConstructorNode' is not assignable to the same property in base type 'HeapSnapshotGridNode'.
   Type '() => HeapSnapshotProviderProxy' is not assignable to type '() => { [x: string]: any; dispose(): void; nodePosition(snapshotObjectId: number): Promise<number...'.
-    Type 'HeapSnapshotProviderProxy' is not assignable to type '{ [x: string]: any; dispose(): void; nodePosition(snapshotObjectId: number): Promise<number>; isE...'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotGridNodes.js(981,27): error TS2339: Property 'snapshot' does not exist on type 'HeapSnapshotSortableDataGrid'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotGridNodes.js(1000,20): error TS2352: Type 'DataGridNode<any>' cannot be converted to type '{ [x: string]: any; dispose(): void; nodePosition(snapshotObjectId: number): Promise<number>; isE...'.
   Type 'DataGridNode<any>' is not comparable to type '{ [x: string]: any; dispose(): void; nodePosition(snapshotObjectId: number): Promise<number>; isE...'.
     Property 'dispose' is missing in type 'DataGridNode<any>'.
-node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotGridNodes.js(1001,5): error TS2322: Type '(this | ({ [x: string]: any; dispose(): void; nodePosition(snapshotObjectId: number): Promise<num...' is not assignable to type '({ [x: string]: any; dispose(): void; nodePosition(snapshotObjectId: number): Promise<number>; is...'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotGridNodes.js(1001,5): error TS2322: Type '(this | ({ [x: string]: any; dispose(): void; nodePosition(snapshotObjectId: number): Promise<num...' is not assignable to type '({ [x: string]: any; dispose(): void; nodePosition(snapshotObjectId: number): Promise<number>; is...'.
   Type 'this | ({ [x: string]: any; dispose(): void; nodePosition(snapshotObjectId: number): Promise<numb...' is not assignable to type '{ [x: string]: any; dispose(): void; nodePosition(snapshotObjectId: number): Promise<number>; isE...'.
     Type 'this' is not assignable to type '{ [x: string]: any; dispose(): void; nodePosition(snapshotObjectId: number): Promise<number>; isE...'.
@@ -9532,6 +9182,7 @@ node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotGridNodes.j
           Type 'this' is not assignable to type '{ [x: string]: any; dispose(): void; nodePosition(snapshotObjectId: number): Promise<number>; isE...'.
             Type 'HeapSnapshotConstructorNode' is not assignable to type '{ [x: string]: any; dispose(): void; nodePosition(snapshotObjectId: number): Promise<number>; isE...'.
               Property 'nodePosition' is missing in type 'HeapSnapshotConstructorNode'.
+node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotGridNodes.js(1001,5): error TS2322: Type '(this | ({ [x: string]: any; dispose(): void; nodePosition(snapshotObjectId: number): Promise<num...' is not assignable to type '({ [x: string]: any; dispose(): void; nodePosition(snapshotObjectId: number): Promise<number>; is...'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotGridNodes.js(1019,14): error TS2339: Property '_searchMatched' does not exist on type 'HeapSnapshotConstructorNode'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotGridNodes.js(1029,81): error TS2339: Property 'snapshot' does not exist on type 'HeapSnapshotSortableDataGrid'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotGridNodes.js(1140,22): error TS2339: Property 'pushAll' does not exist on type 'any[]'.
@@ -9577,6 +9228,24 @@ node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotProxy.js(45
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotProxy.js(457,12): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotProxy.js(507,12): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotView.js(42,11): error TS2555: Expected at least 2 arguments, but got 1.
+node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotView.js(61,50): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; searchCanceled(): void; performSearch(searchConfig: SearchConfig, shouldJump:...'.
+  Type 'HeapSnapshotView' is not assignable to type '{ [x: string]: any; searchCanceled(): void; performSearch(searchConfig: SearchConfig, shouldJump:...'.
+    Property '_profile' does not exist on type '{ [x: string]: any; searchCanceled(): void; performSearch(searchConfig: SearchConfig, shouldJump:...'.
+node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotView.js(67,78): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; showProfile(profile: ProfileHeader): Widget; showObject(snapshotObjectId: any...'.
+  Type 'HeapSnapshotView' is not assignable to type '{ [x: string]: any; showProfile(profile: ProfileHeader): Widget; showObject(snapshotObjectId: any...'.
+    Property '_profile' does not exist on type '{ [x: string]: any; showProfile(profile: ProfileHeader): Widget; showObject(snapshotObjectId: any...'.
+node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotView.js(74,80): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; showProfile(profile: ProfileHeader): Widget; showObject(snapshotObjectId: any...'.
+  Type 'HeapSnapshotView' is not assignable to type '{ [x: string]: any; showProfile(profile: ProfileHeader): Widget; showObject(snapshotObjectId: any...'.
+    Property '_profile' does not exist on type '{ [x: string]: any; showProfile(profile: ProfileHeader): Widget; showObject(snapshotObjectId: any...'.
+node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotView.js(79,64): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; showProfile(profile: ProfileHeader): Widget; showObject(snapshotObjectId: any...'.
+  Type 'HeapSnapshotView' is not assignable to type '{ [x: string]: any; showProfile(profile: ProfileHeader): Widget; showObject(snapshotObjectId: any...'.
+    Property '_profile' does not exist on type '{ [x: string]: any; showProfile(profile: ProfileHeader): Widget; showObject(snapshotObjectId: any...'.
+node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotView.js(85,94): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; showProfile(profile: ProfileHeader): Widget; showObject(snapshotObjectId: any...'.
+  Type 'HeapSnapshotView' is not assignable to type '{ [x: string]: any; showProfile(profile: ProfileHeader): Widget; showObject(snapshotObjectId: any...'.
+    Property '_profile' does not exist on type '{ [x: string]: any; showProfile(profile: ProfileHeader): Widget; showObject(snapshotObjectId: any...'.
+node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotView.js(97,76): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; showProfile(profile: ProfileHeader): Widget; showObject(snapshotObjectId: any...'.
+  Type 'HeapSnapshotView' is not assignable to type '{ [x: string]: any; showProfile(profile: ProfileHeader): Widget; showObject(snapshotObjectId: any...'.
+    Property '_profile' does not exist on type '{ [x: string]: any; showProfile(profile: ProfileHeader): Widget; showObject(snapshotObjectId: any...'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotView.js(106,47): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotView.js(107,54): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotView.js(113,57): error TS2339: Property 'createChild' does not exist on type 'Element'.
@@ -9595,12 +9264,12 @@ node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotView.js(254
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotView.js(256,17): error TS2345: Argument of type 'ToolbarText' is not assignable to parameter of type 'ToolbarComboBox | ToolbarInput'.
   Type 'ToolbarText' is not assignable to type 'ToolbarInput'.
     Property '_prompt' is missing in type 'ToolbarText'.
-node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotView.js(257,5): error TS2322: Type '(ToolbarComboBox | ToolbarInput)[]' is not assignable to type '({ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; })[]'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotView.js(257,5): error TS2322: Type '(ToolbarComboBox | ToolbarInput)[]' is not assignable to type '({ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; })[]'.
   Type 'ToolbarComboBox | ToolbarInput' is not assignable to type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
     Type 'ToolbarComboBox' is not assignable to type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
       Type 'ToolbarComboBox' is not assignable to type '{ [x: string]: any; item(): any & any; }'.
         Property 'item' is missing in type 'ToolbarComboBox'.
+node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotView.js(257,5): error TS2322: Type '(ToolbarComboBox | ToolbarInput)[]' is not assignable to type '({ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; })[]'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotView.js(344,50): error TS2551: Property 'jumpBackwards' does not exist on type 'SearchConfig'. Did you mean 'jumpBackward'?
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotView.js(397,25): error TS2339: Property '_loadPromise' does not exist on type 'ProfileHeader'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotView.js(405,24): error TS2345: Argument of type 'SearchConfig' is not assignable to parameter of type 'SearchConfig'.
@@ -9635,8 +9304,8 @@ node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotView.js(101
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotView.js(1015,12): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotView.js(1038,26): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotView.js(1042,5): error TS2322: Type 'ProfileHeader' is not assignable to type 'HeapProfileHeader'.
-  Property '_heapProfilerModel' is missing in type 'ProfileHeader'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotView.js(1042,5): error TS2322: Type 'ProfileHeader' is not assignable to type 'HeapProfileHeader'.
+  Property '_heapProfilerModel' is missing in type 'ProfileHeader'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotView.js(1050,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotView.js(1056,33): error TS2339: Property 'transferChunk' does not exist on type 'ProfileHeader'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotView.js(1060,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
@@ -9663,16 +9332,18 @@ node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotView.js(131
   Type 'HeapSnapshotProfileType' is not assignable to type '{ [x: string]: any; showProfile(profile: ProfileHeader): Widget; showObject(snapshotObjectId: any...'.
     Property 'showProfile' is missing in type 'HeapSnapshotProfileType'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotView.js(1358,23): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotView.js(1405,27): error TS2339: Property 'HeapSnapshotProgressEvent' does not exist on type 'typeof HeapSnapshotModel'.
-node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotView.js(1411,27): error TS2339: Property 'HeapSnapshotProgressEvent' does not exist on type 'typeof HeapSnapshotModel'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotView.js(1430,30): error TS2339: Property 'bytesToString' does not exist on type 'NumberConstructor'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotView.js(1476,61): error TS2339: Property 'toISO8601Compact' does not exist on type 'Date'.
+node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotView.js(1492,61): error TS2345: Argument of type 'FileOutputStream' is not assignable to parameter of type '{ [x: string]: any; write(data: string): Promise<any>; close(): void; }'.
+  Property 'open' does not exist on type '{ [x: string]: any; write(data: string): Promise<any>; close(): void; }'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotView.js(1525,23): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotView.js(1547,44): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotView.js(1557,77): error TS2339: Property '_profileSamples' does not exist on type 'HeapProfileHeader'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotView.js(1584,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotView.js(1604,79): error TS2339: Property 'peekLast' does not exist on type 'number[]'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotView.js(1719,26): error TS2339: Property 'bytesToString' does not exist on type 'NumberConstructor'.
+node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotView.js(1767,39): error TS2345: Argument of type 'OverviewCalculator' is not assignable to parameter of type '{ [x: string]: any; computePosition(time: number): number; formatValue(time: number, precision?: ...'.
+  Property '_updateBoundaries' does not exist on type '{ [x: string]: any; computePosition(time: number): number; formatValue(time: number, precision?: ...'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotView.js(1823,36): error TS2339: Property 'constrain' does not exist on type 'NumberConstructor'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotView.js(1861,19): error TS2339: Property 'secondsToString' does not exist on type 'NumberConstructor'.
 node_modules/chrome-devtools-frontend/front_end/profiler/HeapSnapshotView.js(1907,33): error TS2339: Property 'createChild' does not exist on type 'Element'.
@@ -9793,8 +9464,11 @@ node_modules/chrome-devtools-frontend/front_end/profiler/ProfileLauncherView.js(
 node_modules/chrome-devtools-frontend/front_end/profiler/ProfileType.js(239,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 node_modules/chrome-devtools-frontend/front_end/profiler/ProfileType.js(244,24): error TS2694: Namespace 'Protocol' has no exported member 'HeapProfiler'.
 node_modules/chrome-devtools-frontend/front_end/profiler/ProfileView.js(10,11): error TS2555: Expected at least 2 arguments, but got 1.
+node_modules/chrome-devtools-frontend/front_end/profiler/ProfileView.js(12,50): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; searchCanceled(): void; performSearch(searchConfig: SearchConfig, shouldJump:...'.
+  Type 'ProfileView' is not assignable to type '{ [x: string]: any; searchCanceled(): void; performSearch(searchConfig: SearchConfig, shouldJump:...'.
+    Property '_searchableView' does not exist on type '{ [x: string]: any; searchCanceled(): void; performSearch(searchConfig: SearchConfig, shouldJump:...'.
 node_modules/chrome-devtools-frontend/front_end/profiler/ProfileView.js(13,41): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/profiler/ProfileView.js(16,56): error TS2694: Namespace 'DataGrid' has no exported member 'ColumnDescriptor'.
+node_modules/chrome-devtools-frontend/front_end/profiler/ProfileView.js(16,56): error TS2694: Namespace 'DataGrid.DataGrid' has no exported member 'ColumnDescriptor'.
 node_modules/chrome-devtools-frontend/front_end/profiler/ProfileView.js(26,42): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/profiler/ProfileView.js(35,45): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/profiler/ProfileView.js(39,47): error TS2555: Expected at least 2 arguments, but got 1.
@@ -9803,21 +9477,18 @@ node_modules/chrome-devtools-frontend/front_end/profiler/ProfileView.js(57,23):
 node_modules/chrome-devtools-frontend/front_end/profiler/ProfileView.js(78,46): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/profiler/ProfileView.js(79,46): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/profiler/ProfileView.js(80,45): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/profiler/ProfileView.js(84,17): error TS2345: Argument of type '(string | Element)[][]' is not assignable to parameter of type 'Iterable<[any, any]>'.
-  Types of property '[Symbol.iterator]' are incompatible.
-    Type '() => IterableIterator<(string | Element)[]>' is not assignable to type '() => Iterator<[any, any]>'.
-      Type 'IterableIterator<(string | Element)[]>' is not assignable to type 'Iterator<[any, any]>'.
-        Types of property 'next' are incompatible.
-          Type '{ (value?: any): IteratorResult<(string | Element)[]>; (value?: any): IteratorResult<(string | El...' is not assignable to type '{ (value?: any): IteratorResult<[any, any]>; (value?: any): IteratorResult<[any, any]>; }'.
-            Type 'IteratorResult<(string | Element)[]>' is not assignable to type 'IteratorResult<[any, any]>'.
-              Type '(string | Element)[]' is not assignable to type '[any, any]'.
-                Property '0' is missing in type '(string | Element)[]'.
+node_modules/chrome-devtools-frontend/front_end/profiler/ProfileView.js(84,17): error TS2345: Argument of type '(string | Element)[][]' is not assignable to parameter of type 'ReadonlyArray<[any, any]>'.
+  Types of property 'concat' are incompatible.
+    Type '{ (...items: ConcatArray<(string | Element)[]>[]): (string | Element)[][]; (...items: ((string | ...' is not assignable to type '{ (...items: ConcatArray<[any, any]>[]): [any, any][]; (...items: ([any, any] | ConcatArray<[any,...'.
+      Type '(string | Element)[][]' is not assignable to type '[any, any][]'.
+        Type '(string | Element)[]' is not assignable to type '[any, any]'.
+          Property '0' is missing in type '(string | Element)[]'.
+node_modules/chrome-devtools-frontend/front_end/profiler/ProfileView.js(127,5): error TS2322: Type '(ToolbarButton | ToolbarComboBox)[]' is not assignable to type '({ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; })[]'.
 node_modules/chrome-devtools-frontend/front_end/profiler/ProfileView.js(127,5): error TS2322: Type '(ToolbarButton | ToolbarComboBox)[]' is not assignable to type '({ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; })[]'.
   Type 'ToolbarButton | ToolbarComboBox' is not assignable to type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
     Type 'ToolbarButton' is not assignable to type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
       Type 'ToolbarButton' is not assignable to type '{ [x: string]: any; item(): any & any; }'.
         Property 'item' is missing in type 'ToolbarButton'.
-node_modules/chrome-devtools-frontend/front_end/profiler/ProfileView.js(127,5): error TS2322: Type '(ToolbarButton | ToolbarComboBox)[]' is not assignable to type '({ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; })[]'.
 node_modules/chrome-devtools-frontend/front_end/profiler/ProfileView.js(136,59): error TS2339: Property 'profile' does not exist on type 'ProfileView'.
 node_modules/chrome-devtools-frontend/front_end/profiler/ProfileView.js(136,78): error TS2339: Property 'adjustedTotal' does not exist on type 'ProfileView'.
 node_modules/chrome-devtools-frontend/front_end/profiler/ProfileView.js(147,59): error TS2339: Property 'profile' does not exist on type 'ProfileView'.
@@ -9837,6 +9508,11 @@ node_modules/chrome-devtools-frontend/front_end/profiler/ProfileView.js(368,5):
 node_modules/chrome-devtools-frontend/front_end/profiler/ProfileView.js(404,68): error TS2339: Property 'bytesToString' does not exist on type 'NumberConstructor'.
 node_modules/chrome-devtools-frontend/front_end/profiler/ProfileView.js(459,56): error TS2339: Property 'toISO8601Compact' does not exist on type 'Date'.
 node_modules/chrome-devtools-frontend/front_end/profiler/ProfileView.js(475,23): error TS2555: Expected at least 2 arguments, but got 1.
+node_modules/chrome-devtools-frontend/front_end/profiler/ProfileView.js(479,41): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; write(data: string): Promise<any>; close(): void; }'.
+  Type 'WritableProfileHeader' is not assignable to type '{ [x: string]: any; write(data: string): Promise<any>; close(): void; }'.
+    Property '_debuggerModel' does not exist on type '{ [x: string]: any; write(data: string): Promise<any>; close(): void; }'.
+node_modules/chrome-devtools-frontend/front_end/profiler/ProfileView.js(481,21): error TS2345: Argument of type 'ChunkedFileReader' is not assignable to parameter of type '{ [x: string]: any; fileSize(): number; loadedSize(): number; fileName(): string; cancel(): void;...'.
+  Property '_file' does not exist on type '{ [x: string]: any; fileSize(): number; loadedSize(): number; fileName(): string; cancel(): void;...'.
 node_modules/chrome-devtools-frontend/front_end/profiler/ProfileView.js(482,24): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/profiler/ProfileView.js(485,23): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/profiler/ProfileView.js(488,44): error TS2694: Namespace 'Protocol' has no exported member 'Profiler'.
@@ -9858,6 +9534,9 @@ node_modules/chrome-devtools-frontend/front_end/profiler/ProfilesPanel.js(129,28
 node_modules/chrome-devtools-frontend/front_end/profiler/ProfilesPanel.js(157,28): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/profiler/ProfilesPanel.js(210,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/profiler/ProfilesPanel.js(233,23): error TS2339: Property 'removeChildren' does not exist on type 'Element'.
+node_modules/chrome-devtools-frontend/front_end/profiler/ProfilesPanel.js(254,69): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; showProfile(profile: ProfileHeader): Widget; showObject(snapshotObjectId: any...'.
+  Type 'ProfilesPanel' is not assignable to type '{ [x: string]: any; showProfile(profile: ProfileHeader): Widget; showObject(snapshotObjectId: any...'.
+    Property '_profileTypes' does not exist on type '{ [x: string]: any; showProfile(profile: ProfileHeader): Widget; showObject(snapshotObjectId: any...'.
 node_modules/chrome-devtools-frontend/front_end/profiler/ProfilesPanel.js(261,24): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/profiler/ProfilesPanel.js(269,24): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/profiler/ProfilesPanel.js(277,24): error TS2694: Namespace 'Common' has no exported member 'Event'.
@@ -9867,8 +9546,9 @@ node_modules/chrome-devtools-frontend/front_end/profiler/ProfilesPanel.js(304,68
 node_modules/chrome-devtools-frontend/front_end/profiler/ProfilesPanel.js(310,31): error TS2339: Property 'click' does not exist on type 'Node'.
 node_modules/chrome-devtools-frontend/front_end/profiler/ProfilesPanel.js(374,29): error TS2339: Property 'syncToolbarItems' does not exist on type 'Widget'.
 node_modules/chrome-devtools-frontend/front_end/profiler/ProfilesPanel.js(383,24): error TS2694: Namespace 'Protocol' has no exported member 'HeapProfiler'.
-node_modules/chrome-devtools-frontend/front_end/profiler/ProfilesPanel.js(494,9): error TS2322: Type 'ProfileGroupSidebarTreeElement' is not assignable to type 'this'.
-node_modules/chrome-devtools-frontend/front_end/profiler/ProfilesPanel.js(530,9): error TS2322: Type 'ProfileGroupSidebarTreeElement' is not assignable to type 'this'.
+node_modules/chrome-devtools-frontend/front_end/profiler/ProfilesPanel.js(397,35): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; showProfile(profile: ProfileHeader): Widget; showObject(snapshotObjectId: any...'.
+  Type 'ProfilesPanel' is not assignable to type '{ [x: string]: any; showProfile(profile: ProfileHeader): Widget; showObject(snapshotObjectId: any...'.
+    Property '_profileTypes' does not exist on type '{ [x: string]: any; showProfile(profile: ProfileHeader): Widget; showObject(snapshotObjectId: any...'.
 node_modules/chrome-devtools-frontend/front_end/profiler/ProfilesPanel.js(596,48): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/profiler/ProfilesPanel.js(598,49): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/profiler/ProfilesPanel.js(614,41): error TS2555: Expected at least 2 arguments, but got 1.
@@ -9906,17 +9586,14 @@ node_modules/chrome-devtools-frontend/front_end/profiler/TopDownProfileDataGrid.
     Type 'TopDownProfileDataGridNode' is not assignable to type '{ [x: string]: any; formatValue(value: number, node: any & any): string; formatPercent(value: num...'.
       Type 'TopDownProfileDataGridNode' is not assignable to type '{ [x: string]: any; formatValue(value: number, node: any & any): string; formatPercent(value: num...'.
         Property 'formatValue' is missing in type 'TopDownProfileDataGridNode'.
-node_modules/chrome-devtools-frontend/front_end/protocol/InspectorBackend.js(31,23): error TS1003: Identifier expected.
-node_modules/chrome-devtools-frontend/front_end/protocol/InspectorBackend.js(32,10): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/protocol/InspectorBackend.js(168,40): error TS2345: Argument of type 'S' is not assignable to parameter of type 'S'.
 node_modules/chrome-devtools-frontend/front_end/protocol/InspectorBackend.js(170,24): error TS2345: Argument of type 'S' is not assignable to parameter of type 'T'.
 node_modules/chrome-devtools-frontend/front_end/protocol/InspectorBackend.js(194,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 node_modules/chrome-devtools-frontend/front_end/protocol/InspectorBackend.js(201,2): error TS1131: Property or signature expected.
-node_modules/chrome-devtools-frontend/front_end/protocol/InspectorBackend.js(205,38): error TS2339: Property 'Params' does not exist on type '() => void'.
-node_modules/chrome-devtools-frontend/front_end/protocol/InspectorBackend.js(208,61): error TS2694: Namespace 'Connection' has no exported member 'Params'.
-node_modules/chrome-devtools-frontend/front_end/protocol/InspectorBackend.js(209,2): error TS1003: Identifier expected.
-node_modules/chrome-devtools-frontend/front_end/protocol/InspectorBackend.js(210,38): error TS2339: Property 'Factory' does not exist on type '() => void'.
-node_modules/chrome-devtools-frontend/front_end/protocol/InspectorBackend.js(217,53): error TS2694: Namespace 'Connection' has no exported member 'Factory'.
+node_modules/chrome-devtools-frontend/front_end/protocol/InspectorBackend.js(205,38): error TS2339: Property 'Params' does not exist on type '{ (): void; prototype: { [x: string]: any; }; }'.
+node_modules/chrome-devtools-frontend/front_end/protocol/InspectorBackend.js(208,61): error TS2694: Namespace 'Protocol.InspectorBackend.Connection' has no exported member 'Params'.
+node_modules/chrome-devtools-frontend/front_end/protocol/InspectorBackend.js(210,38): error TS2339: Property 'Factory' does not exist on type '{ (): void; prototype: { [x: string]: any; }; }'.
+node_modules/chrome-devtools-frontend/front_end/protocol/InspectorBackend.js(217,53): error TS2694: Namespace 'Protocol.InspectorBackend.Connection' has no exported member 'Factory'.
 node_modules/chrome-devtools-frontend/front_end/protocol/InspectorBackend.js(229,36): error TS2339: Property 'deprecatedRunAfterPendingDispatches' does not exist on type 'typeof InspectorBackend'.
 node_modules/chrome-devtools-frontend/front_end/protocol/InspectorBackend.js(230,33): error TS2339: Property 'deprecatedRunAfterPendingDispatches' does not exist on type 'typeof InspectorBackend'.
 node_modules/chrome-devtools-frontend/front_end/protocol/InspectorBackend.js(233,36): error TS2339: Property 'sendRawMessageForTesting' does not exist on type 'typeof InspectorBackend'.
@@ -9926,7 +9603,6 @@ node_modules/chrome-devtools-frontend/front_end/protocol/InspectorBackend.js(310
 node_modules/chrome-devtools-frontend/front_end/protocol/InspectorBackend.js(312,16): error TS2339: Property 'sendRequestTime' does not exist on type '(arg0: any) => any'.
 node_modules/chrome-devtools-frontend/front_end/protocol/InspectorBackend.js(422,49): error TS2339: Property 'context' does not exist on type 'Console'.
 node_modules/chrome-devtools-frontend/front_end/protocol/InspectorBackend.js(422,67): error TS2339: Property 'context' does not exist on type 'Console'.
-node_modules/chrome-devtools-frontend/front_end/protocol/InspectorBackend.js(625,27): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/protocol/InspectorBackend.js(634,33): error TS2694: Namespace 'Protocol' has no exported member 'Error'.
 node_modules/chrome-devtools-frontend/front_end/protocol/InspectorBackend.js(716,49): error TS2339: Property 'context' does not exist on type 'Console'.
 node_modules/chrome-devtools-frontend/front_end/protocol/InspectorBackend.js(716,67): error TS2339: Property 'context' does not exist on type 'Console'.
@@ -9939,15 +9615,12 @@ node_modules/chrome-devtools-frontend/front_end/quick_open/CommandMenu.js(204,24
 node_modules/chrome-devtools-frontend/front_end/quick_open/CommandMenu.js(207,18): error TS2339: Property 'createTextChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/quick_open/CommandMenu.js(221,34): error TS2345: Argument of type 'number' is not assignable to parameter of type '{ [x: string]: any; WindowDocked: number; WindowUndocked: number; ScriptsBreakpointSet: number; T...'.
 node_modules/chrome-devtools-frontend/front_end/quick_open/CommandMenu.js(229,12): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/quick_open/CommandMenu.js(315,27): error TS2339: Property 'bringToFront' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/quick_open/CommandMenu.js(315,27): error TS2339: Property 'bringToFront' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/quick_open/FilteredListWidget.js(24,47): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/quick_open/FilteredListWidget.js(33,57): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/quick_open/FilteredListWidget.js(40,50): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; createElementForItem(item: T): Element; heightForItem(item: T): number; isIte...'.
   Type 'FilteredListWidget' is not assignable to type '{ [x: string]: any; createElementForItem(item: T): Element; heightForItem(item: T): number; isIte...'.
-    Types of property 'createElementForItem' are incompatible.
-      Type '(item: number) => Element' is not assignable to type '(item: T) => Element'.
-        Types of parameters 'item' and 'item' are incompatible.
-          Type 'T' is not assignable to type 'number'.
+    Property '_promptHistory' does not exist on type '{ [x: string]: any; createElementForItem(item: T): Element; heightForItem(item: T): number; isIte...'.
 node_modules/chrome-devtools-frontend/front_end/quick_open/FilteredListWidget.js(107,34): error TS2345: Argument of type 'symbol' is not assignable to parameter of type '{ [x: string]: any; SetExactSize: symbol; SetExactWidthMaxHeight: symbol; MeasureContent: symbol; }'.
 node_modules/chrome-devtools-frontend/front_end/quick_open/FilteredListWidget.js(175,23): error TS2339: Property '_scoringTimer' does not exist on type 'FilteredListWidget'.
 node_modules/chrome-devtools-frontend/front_end/quick_open/FilteredListWidget.js(178,17): error TS2339: Property '_scoringTimer' does not exist on type 'FilteredListWidget'.
@@ -9962,9 +9635,13 @@ node_modules/chrome-devtools-frontend/front_end/quick_open/FilteredListWidget.js
 node_modules/chrome-devtools-frontend/front_end/quick_open/FilteredListWidget.js(313,14): error TS2339: Property '_refreshListWithCurrentResult' does not exist on type 'FilteredListWidget'.
 node_modules/chrome-devtools-frontend/front_end/quick_open/FilteredListWidget.js(331,38): error TS2339: Property 'filterRegex' does not exist on type 'StringConstructor'.
 node_modules/chrome-devtools-frontend/front_end/quick_open/FilteredListWidget.js(342,31): error TS2339: Property 'constrain' does not exist on type 'NumberConstructor'.
+node_modules/chrome-devtools-frontend/front_end/quick_open/FilteredListWidget.js(360,19): error TS2339: Property '_scoringTimer' does not exist on type 'FilteredListWidget'.
 node_modules/chrome-devtools-frontend/front_end/quick_open/FilteredListWidget.js(375,34): error TS2339: Property 'upperBound' does not exist on type 'any[]'.
 node_modules/chrome-devtools-frontend/front_end/quick_open/FilteredListWidget.js(380,42): error TS2339: Property 'peekLast' does not exist on type 'any[]'.
 node_modules/chrome-devtools-frontend/front_end/quick_open/FilteredListWidget.js(384,37): error TS2339: Property 'peekLast' does not exist on type 'any[]'.
+node_modules/chrome-devtools-frontend/front_end/quick_open/FilteredListWidget.js(390,12): error TS2339: Property '_refreshListWithCurrentResult' does not exist on type 'FilteredListWidget'.
+node_modules/chrome-devtools-frontend/front_end/quick_open/FilteredListWidget.js(394,14): error TS2339: Property '_scoringTimer' does not exist on type 'FilteredListWidget'.
+node_modules/chrome-devtools-frontend/front_end/quick_open/FilteredListWidget.js(405,12): error TS2339: Property '_refreshListWithCurrentResult' does not exist on type 'FilteredListWidget'.
 node_modules/chrome-devtools-frontend/front_end/quick_open/FilteredListWidget.js(415,17): error TS2339: Property '_refreshListWithCurrentResult' does not exist on type 'FilteredListWidget'.
 node_modules/chrome-devtools-frontend/front_end/quick_open/FilteredListWidget.js(418,40): error TS2339: Property 'offsetHeight' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/quick_open/FilteredListWidget.js(422,28): error TS2339: Property 'offsetHeight' does not exist on type 'Element'.
@@ -10005,17 +9682,17 @@ node_modules/chrome-devtools-frontend/front_end/resources/ApplicationCacheItemsV
 node_modules/chrome-devtools-frontend/front_end/resources/ApplicationCacheItemsView.js(44,22): error TS2339: Property 'style' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/resources/ApplicationCacheItemsView.js(48,44): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/resources/ApplicationCacheItemsView.js(59,32): error TS2339: Property 'style' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/resources/ApplicationCacheItemsView.js(67,5): error TS2322: Type 'ToolbarItem[]' is not assignable to type '({ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; })[]'.
 node_modules/chrome-devtools-frontend/front_end/resources/ApplicationCacheItemsView.js(67,5): error TS2322: Type 'ToolbarItem[]' is not assignable to type '({ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; })[]'.
   Type 'ToolbarItem' is not assignable to type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
     Type 'ToolbarItem' is not assignable to type '{ [x: string]: any; item(): any & any; }'.
       Property 'item' is missing in type 'ToolbarItem'.
+node_modules/chrome-devtools-frontend/front_end/resources/ApplicationCacheItemsView.js(67,5): error TS2322: Type 'ToolbarItem[]' is not assignable to type '({ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; })[]'.
 node_modules/chrome-devtools-frontend/front_end/resources/ApplicationCacheItemsView.js(117,22): error TS2339: Property 'type' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/resources/ApplicationCacheItemsView.js(131,30): error TS2339: Property 'type' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/resources/ApplicationCacheItemsView.js(132,44): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/resources/ApplicationCacheItemsView.js(134,30): error TS2339: Property 'type' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/resources/ApplicationCacheItemsView.js(135,44): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/resources/ApplicationCacheItemsView.js(177,56): error TS2694: Namespace 'DataGrid' has no exported member 'ColumnDescriptor'.
+node_modules/chrome-devtools-frontend/front_end/resources/ApplicationCacheItemsView.js(177,56): error TS2694: Namespace 'DataGrid.DataGrid' has no exported member 'ColumnDescriptor'.
 node_modules/chrome-devtools-frontend/front_end/resources/ApplicationCacheItemsView.js(178,31): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/resources/ApplicationCacheItemsView.js(179,27): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/resources/ApplicationCacheItemsView.js(180,27): error TS2555: Expected at least 2 arguments, but got 1.
@@ -10072,7 +9749,6 @@ node_modules/chrome-devtools-frontend/front_end/resources/ApplicationPanelSideba
 node_modules/chrome-devtools-frontend/front_end/resources/ApplicationPanelSidebar.js(1518,45): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/resources/ApplicationPanelSidebar.js(1530,55): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/resources/ApplicationPanelSidebar.js(1555,9): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/resources/ClearStorageView.js(11,26): error TS2339: Property 'Storage' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/resources/ClearStorageView.js(22,42): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/resources/ClearStorageView.js(37,48): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/resources/ClearStorageView.js(40,54): error TS2339: Property 'bytesToString' does not exist on type 'NumberConstructor'.
@@ -10090,42 +9766,28 @@ node_modules/chrome-devtools-frontend/front_end/resources/ClearStorageView.js(63
 node_modules/chrome-devtools-frontend/front_end/resources/ClearStorageView.js(63,69): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/resources/ClearStorageView.js(104,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/resources/ClearStorageView.js(129,18): error TS2339: Property 'storageAgent' does not exist on type 'Target'.
-node_modules/chrome-devtools-frontend/front_end/resources/ClearStorageView.js(132,35): error TS2339: Property 'Storage' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/resources/ClearStorageView.js(133,26): error TS2339: Property 'Storage' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/resources/ClearStorageView.js(139,26): error TS2339: Property 'Storage' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/resources/ClearStorageView.js(147,26): error TS2339: Property 'Storage' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/resources/ClearStorageView.js(153,26): error TS2339: Property 'Storage' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/resources/ClearStorageView.js(161,26): error TS2339: Property 'Storage' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/resources/ClearStorageView.js(168,26): error TS2339: Property 'Storage' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/resources/ClearStorageView.js(174,23): error TS2339: Property 'disabled' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/resources/ClearStorageView.js(176,37): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/resources/ClearStorageView.js(178,25): error TS2339: Property 'disabled' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/resources/ClearStorageView.js(192,39): error TS2339: Property 'storageAgent' does not exist on type 'Target'.
-node_modules/chrome-devtools-frontend/front_end/resources/ClearStorageView.js(193,27): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/resources/ClearStorageView.js(199,51): error TS2339: Property 'bytesToString' does not exist on type 'NumberConstructor'.
 node_modules/chrome-devtools-frontend/front_end/resources/ClearStorageView.js(199,89): error TS2339: Property 'bytesToString' does not exist on type 'NumberConstructor'.
 node_modules/chrome-devtools-frontend/front_end/resources/ClearStorageView.js(211,47): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/resources/ClearStorageView.js(212,93): error TS2339: Property 'bytesToString' does not exist on type 'NumberConstructor'.
 node_modules/chrome-devtools-frontend/front_end/resources/ClearStorageView.js(227,26): error TS2339: Property 'removeChildren' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/resources/ClearStorageView.js(236,21): error TS2339: Property 'Storage' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/resources/ClearStorageView.js(237,16): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/resources/ClearStorageView.js(238,21): error TS2339: Property 'Storage' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/resources/ClearStorageView.js(239,16): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/resources/ClearStorageView.js(240,21): error TS2339: Property 'Storage' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/resources/ClearStorageView.js(241,16): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/resources/ClearStorageView.js(242,21): error TS2339: Property 'Storage' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/resources/ClearStorageView.js(243,16): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/resources/ClearStorageView.js(244,21): error TS2339: Property 'Storage' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/resources/ClearStorageView.js(245,16): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/resources/ClearStorageView.js(246,21): error TS2339: Property 'Storage' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/resources/ClearStorageView.js(247,16): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/resources/ClearStorageView.js(249,16): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/resources/ClearStorageView.js(256,31): error TS2694: Namespace 'Protocol' has no exported member 'Storage'.
 node_modules/chrome-devtools-frontend/front_end/resources/CookieItemsView.js(36,11): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/resources/CookieItemsView.js(47,43): error TS2694: Namespace 'EventTarget' has no exported member 'EventDescriptor'.
+node_modules/chrome-devtools-frontend/front_end/resources/CookieItemsView.js(47,43): error TS2694: Namespace 'Common.EventTarget' has no exported member 'EventDescriptor'.
 node_modules/chrome-devtools-frontend/front_end/resources/CookieItemsView.js(101,42): error TS2339: Property 'asParsedURL' does not exist on type 'string'.
 node_modules/chrome-devtools-frontend/front_end/resources/DOMStorageItemsView.js(32,11): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/resources/DOMStorageItemsView.js(38,56): error TS2694: Namespace 'DataGrid' has no exported member 'ColumnDescriptor'.
+node_modules/chrome-devtools-frontend/front_end/resources/DOMStorageItemsView.js(38,56): error TS2694: Namespace 'DataGrid.DataGrid' has no exported member 'ColumnDescriptor'.
 node_modules/chrome-devtools-frontend/front_end/resources/DOMStorageItemsView.js(39,26): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/resources/DOMStorageItemsView.js(40,28): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/resources/DOMStorageItemsView.js(55,46): error TS2339: Property 'createChild' does not exist on type 'Element'.
@@ -10135,6 +9797,8 @@ node_modules/chrome-devtools-frontend/front_end/resources/DOMStorageItemsView.js
 node_modules/chrome-devtools-frontend/front_end/resources/DOMStorageItemsView.js(178,11): error TS2403: Subsequent variable declarations must have the same type.  Variable 'node' must be of type 'any', but here has type 'DataGridNode<any>'.
 node_modules/chrome-devtools-frontend/front_end/resources/DOMStorageItemsView.js(259,36): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/resources/DOMStorageItemsView.js(275,38): error TS2339: Property 'key' does not exist on type 'DataGridNode<any>'.
+node_modules/chrome-devtools-frontend/front_end/resources/DOMStorageItemsView.js(278,66): error TS2345: Argument of type 'StaticContentProvider' is not assignable to parameter of type '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
+  Property '_contentURL' does not exist on type '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
 node_modules/chrome-devtools-frontend/front_end/resources/DOMStorageModel.js(49,25): error TS2694: Namespace 'Protocol' has no exported member 'DOMStorage'.
 node_modules/chrome-devtools-frontend/front_end/resources/DOMStorageModel.js(55,26): error TS2694: Namespace 'Protocol' has no exported member 'DOMStorage'.
 node_modules/chrome-devtools-frontend/front_end/resources/DOMStorageModel.js(71,41): error TS2694: Namespace 'Protocol' has no exported member 'DOMStorage'.
@@ -10151,14 +9815,14 @@ node_modules/chrome-devtools-frontend/front_end/resources/DOMStorageModel.js(298
 node_modules/chrome-devtools-frontend/front_end/resources/DOMStorageModel.js(306,24): error TS2694: Namespace 'Protocol' has no exported member 'DOMStorage'.
 node_modules/chrome-devtools-frontend/front_end/resources/DOMStorageModel.js(315,24): error TS2694: Namespace 'Protocol' has no exported member 'DOMStorage'.
 node_modules/chrome-devtools-frontend/front_end/resources/DOMStorageModel.js(325,24): error TS2694: Namespace 'Protocol' has no exported member 'DOMStorage'.
-node_modules/chrome-devtools-frontend/front_end/resources/DatabaseModel.js(98,35): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/resources/DatabaseModel.js(112,17): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/resources/DatabaseModel.js(130,26): error TS2339: Property 'databaseAgent' does not exist on type 'Target'.
 node_modules/chrome-devtools-frontend/front_end/resources/DatabaseModel.js(131,19): error TS2339: Property 'registerDatabaseDispatcher' does not exist on type 'Target'.
 node_modules/chrome-devtools-frontend/front_end/resources/DatabaseModel.js(191,24): error TS2694: Namespace 'Protocol' has no exported member 'Database'.
 node_modules/chrome-devtools-frontend/front_end/resources/DatabaseQueryView.js(38,42): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/resources/DatabaseQueryView.js(52,62): error TS2339: Property 'hasSelection' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/resources/DatabaseQueryView.js(60,39): error TS2694: Namespace 'SuggestBox' has no exported member 'Suggestions'.
+node_modules/chrome-devtools-frontend/front_end/resources/DatabaseQueryView.js(60,39): error TS2694: Namespace 'UI.SuggestBox' has no exported member 'Suggestions'.
+node_modules/chrome-devtools-frontend/front_end/resources/DatabaseQueryView.js(85,64): error TS2339: Property 'hasSelection' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/resources/DatabaseQueryView.js(151,19): error TS2339: Property 'createTextChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/resources/DatabaseTableView.js(31,11): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/resources/DatabaseTableView.js(40,47): error TS2555: Expected at least 2 arguments, but got 1.
@@ -10183,8 +9847,7 @@ node_modules/chrome-devtools-frontend/front_end/resources/IndexedDBModel.js(112,
 node_modules/chrome-devtools-frontend/front_end/resources/IndexedDBModel.js(215,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/resources/IndexedDBModel.js(223,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/resources/IndexedDBModel.js(258,36): error TS2339: Property 'asParsedURL' does not exist on type 'string'.
-node_modules/chrome-devtools-frontend/front_end/resources/IndexedDBModel.js(411,27): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/resources/IndexedDBModel.js(412,66): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
+node_modules/chrome-devtools-frontend/front_end/resources/IndexedDBModel.js(276,14): error TS2403: Subsequent variable declarations must have the same type.  Variable 'databaseName' must be of type 'any', but here has type 'string'.
 node_modules/chrome-devtools-frontend/front_end/resources/IndexedDBViews.js(43,62): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/resources/IndexedDBViews.js(49,59): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/resources/IndexedDBViews.js(50,52): error TS2555: Expected at least 2 arguments, but got 1.
@@ -10199,7 +9862,7 @@ node_modules/chrome-devtools-frontend/front_end/resources/IndexedDBViews.js(122,
 node_modules/chrome-devtools-frontend/front_end/resources/IndexedDBViews.js(125,46): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/resources/IndexedDBViews.js(128,60): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/resources/IndexedDBViews.js(130,33): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/resources/IndexedDBViews.js(147,56): error TS2694: Namespace 'DataGrid' has no exported member 'ColumnDescriptor'.
+node_modules/chrome-devtools-frontend/front_end/resources/IndexedDBViews.js(147,56): error TS2694: Namespace 'DataGrid.DataGrid' has no exported member 'ColumnDescriptor'.
 node_modules/chrome-devtools-frontend/front_end/resources/IndexedDBViews.js(148,40): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/resources/IndexedDBViews.js(150,69): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/resources/IndexedDBViews.js(154,57): error TS2555: Expected at least 2 arguments, but got 1.
@@ -10245,7 +9908,9 @@ node_modules/chrome-devtools-frontend/front_end/resources/IndexedDBViews.js(433,
 node_modules/chrome-devtools-frontend/front_end/resources/ResourcesPanel.js(22,47): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/resources/ResourcesPanel.js(43,59): error TS2339: Property 'runtime' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/resources/ResourcesSection.js(69,33): error TS2339: Property 'remove' does not exist on type 'Map<string, FrameTreeElement>'.
-node_modules/chrome-devtools-frontend/front_end/resources/ResourcesSection.js(302,27): error TS2339: Property 'openInNewTab' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/resources/ResourcesSection.js(278,64): error TS2345: Argument of type 'Resource' is not assignable to parameter of type '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
+  Property '_resourceTreeModel' does not exist on type '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
+node_modules/chrome-devtools-frontend/front_end/resources/ResourcesSection.js(302,27): error TS2339: Property 'openInNewTab' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/resources/ResourcesSection.js(311,26): error TS2339: Property 'draggable' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/resources/ResourcesSection.js(321,11): error TS2339: Property 'dataTransfer' does not exist on type 'MouseEvent'.
 node_modules/chrome-devtools-frontend/front_end/resources/ResourcesSection.js(322,11): error TS2339: Property 'dataTransfer' does not exist on type 'MouseEvent'.
@@ -10264,7 +9929,7 @@ node_modules/chrome-devtools-frontend/front_end/resources/ServiceWorkerCacheView
 node_modules/chrome-devtools-frontend/front_end/resources/ServiceWorkerCacheViews.js(56,37): error TS2345: Argument of type 'ToolbarButton' is not assignable to parameter of type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
   Type 'ToolbarButton' is not assignable to type '{ [x: string]: any; item(): any & any; }'.
 node_modules/chrome-devtools-frontend/front_end/resources/ServiceWorkerCacheViews.js(90,36): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/resources/ServiceWorkerCacheViews.js(99,56): error TS2694: Namespace 'DataGrid' has no exported member 'ColumnDescriptor'.
+node_modules/chrome-devtools-frontend/front_end/resources/ServiceWorkerCacheViews.js(99,56): error TS2694: Namespace 'DataGrid.DataGrid' has no exported member 'ColumnDescriptor'.
 node_modules/chrome-devtools-frontend/front_end/resources/ServiceWorkerCacheViews.js(100,27): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/resources/ServiceWorkerCacheViews.js(101,34): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/resources/ServiceWorkerCacheViews.js(103,16): error TS2555: Expected at least 2 arguments, but got 1.
@@ -10276,7 +9941,7 @@ node_modules/chrome-devtools-frontend/front_end/resources/ServiceWorkerCacheView
 node_modules/chrome-devtools-frontend/front_end/resources/ServiceWorkerCacheViews.js(253,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/resources/ServiceWorkerCacheViews.js(260,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/resources/ServiceWorkerCacheViews.js(285,24): error TS2694: Namespace 'Protocol' has no exported member 'CacheStorage'.
-node_modules/chrome-devtools-frontend/front_end/resources/ServiceWorkerCacheViews.js(316,44): error TS2694: Namespace 'NetworkRequest' has no exported member 'ContentData'.
+node_modules/chrome-devtools-frontend/front_end/resources/ServiceWorkerCacheViews.js(316,44): error TS2694: Namespace 'SDK.NetworkRequest' has no exported member 'ContentData'.
 node_modules/chrome-devtools-frontend/front_end/resources/ServiceWorkerCacheViews.js(381,43): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/resources/ServiceWorkerCacheViews.js(382,43): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/resources/ServiceWorkersView.js(12,50): error TS2555: Expected at least 2 arguments, but got 1.
@@ -10294,7 +9959,7 @@ node_modules/chrome-devtools-frontend/front_end/resources/ServiceWorkersView.js(
 node_modules/chrome-devtools-frontend/front_end/resources/ServiceWorkersView.js(66,37): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/resources/ServiceWorkersView.js(67,37): error TS2345: Argument of type 'ToolbarSettingCheckbox' is not assignable to parameter of type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
   Type 'ToolbarSettingCheckbox' is not assignable to type '{ [x: string]: any; item(): any & any; }'.
-node_modules/chrome-devtools-frontend/front_end/resources/ServiceWorkersView.js(69,75): error TS2694: Namespace 'EventTarget' has no exported member 'EventDescriptor'.
+node_modules/chrome-devtools-frontend/front_end/resources/ServiceWorkersView.js(69,75): error TS2694: Namespace 'Common.EventTarget' has no exported member 'EventDescriptor'.
 node_modules/chrome-devtools-frontend/front_end/resources/ServiceWorkersView.js(120,7): error TS2447: The '|=' operator is not allowed for boolean types. Consider using '||' instead.
 node_modules/chrome-devtools-frontend/front_end/resources/ServiceWorkersView.js(121,7): error TS2447: The '|=' operator is not allowed for boolean types. Consider using '||' instead.
 node_modules/chrome-devtools-frontend/front_end/resources/ServiceWorkersView.js(150,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
@@ -10389,13 +10054,16 @@ node_modules/chrome-devtools-frontend/front_end/screencast/ScreencastApp.js(12,4
 node_modules/chrome-devtools-frontend/front_end/screencast/ScreencastApp.js(85,35): error TS2345: Argument of type 'ScreencastView' is not assignable to parameter of type 'boolean'.
 node_modules/chrome-devtools-frontend/front_end/screencast/ScreencastApp.js(107,5): error TS2322: Type 'ToolbarToggle' is not assignable to type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
   Type 'ToolbarToggle' is not assignable to type '{ [x: string]: any; item(): any & any; }'.
-    Property 'item' is missing in type 'ToolbarToggle'.
 node_modules/chrome-devtools-frontend/front_end/screencast/ScreencastApp.js(107,5): error TS2322: Type 'ToolbarToggle' is not assignable to type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
   Type 'ToolbarToggle' is not assignable to type '{ [x: string]: any; item(): any & any; }'.
+    Property 'item' is missing in type 'ToolbarToggle'.
 node_modules/chrome-devtools-frontend/front_end/screencast/ScreencastApp.js(121,5): error TS2322: Type 'ScreencastApp' is not assignable to type '{ [x: string]: any; presentUI(document: Document): void; }'.
 node_modules/chrome-devtools-frontend/front_end/screencast/ScreencastApp.js(121,5): error TS2322: Type 'ScreencastApp' is not assignable to type '{ [x: string]: any; presentUI(document: Document): void; }'.
   Property '_enabledSetting' does not exist on type '{ [x: string]: any; presentUI(document: Document): void; }'.
 node_modules/chrome-devtools-frontend/front_end/screencast/ScreencastView.js(56,42): error TS2339: Property 'createChild' does not exist on type 'Element'.
+node_modules/chrome-devtools-frontend/front_end/screencast/ScreencastView.js(136,41): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; highlightDOMNode(node: DOMNode, config: any, backendNodeId?: any, objectId?: ...'.
+  Type 'ScreencastView' is not assignable to type '{ [x: string]: any; highlightDOMNode(node: DOMNode, config: any, backendNodeId?: any, objectId?: ...'.
+    Property '_screenCaptureModel' does not exist on type '{ [x: string]: any; highlightDOMNode(node: DOMNode, config: any, backendNodeId?: any, objectId?: ...'.
 node_modules/chrome-devtools-frontend/front_end/screencast/ScreencastView.js(152,24): error TS2694: Namespace 'Protocol' has no exported member 'Page'.
 node_modules/chrome-devtools-frontend/front_end/screencast/ScreencastView.js(193,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/screencast/ScreencastView.js(205,44): error TS2555: Expected at least 2 arguments, but got 1.
@@ -10424,13 +10092,12 @@ node_modules/chrome-devtools-frontend/front_end/screencast/ScreencastView.js(557
 node_modules/chrome-devtools-frontend/front_end/screencast/ScreencastView.js(558,31): error TS2339: Property 'offsetHeight' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/screencast/ScreencastView.js(564,24): error TS2694: Namespace 'Protocol' has no exported member 'Overlay'.
 node_modules/chrome-devtools-frontend/front_end/screencast/ScreencastView.js(565,24): error TS2694: Namespace 'Protocol' has no exported member 'Overlay'.
-node_modules/chrome-devtools-frontend/front_end/screencast/ScreencastView.js(569,49): error TS2339: Property 'Overlay' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/screencast/ScreencastView.js(575,24): error TS2694: Namespace 'Protocol' has no exported member 'Page'.
 node_modules/chrome-devtools-frontend/front_end/screencast/ScreencastView.js(600,40): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/screencast/ScreencastView.js(608,25): error TS2339: Property 'type' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/screencast/ScreencastView.js(644,15): error TS2339: Property 'key' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/screencast/ScreencastView.js(646,35): error TS2339: Property 'value' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/screencast/ScreencastView.js(670,27): error TS2339: Property 'inspectedURLChanged' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/screencast/ScreencastView.js(670,27): error TS2339: Property 'inspectedURLChanged' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/screencast/ScreencastView.js(671,25): error TS2339: Property 'value' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/screencast/ScreencastView.js(675,25): error TS2339: Property 'focus' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/screencast/ScreencastView.js(676,25): error TS2339: Property 'select' does not exist on type 'Element'.
@@ -10473,12 +10140,11 @@ node_modules/chrome-devtools-frontend/front_end/sdk/CPUProfilerModel.js(79,24):
 node_modules/chrome-devtools-frontend/front_end/sdk/CPUProfilerModel.js(88,10): error TS2339: Property 'runtime' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CPUProfilerModel.js(97,24): error TS2694: Namespace 'Protocol' has no exported member 'Debugger'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CPUProfilerModel.js(99,24): error TS2694: Namespace 'Protocol' has no exported member 'Profiler'.
-node_modules/chrome-devtools-frontend/front_end/sdk/CPUProfilerModel.js(104,49): error TS2694: Namespace 'CPUProfilerModel' has no exported member 'EventData'.
+node_modules/chrome-devtools-frontend/front_end/sdk/CPUProfilerModel.js(104,49): error TS2694: Namespace 'SDK.CPUProfilerModel' has no exported member 'EventData'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CPUProfilerModel.js(127,34): error TS2694: Namespace 'Protocol' has no exported member 'Profiler'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CPUProfilerModel.js(144,41): error TS2694: Namespace 'Protocol' has no exported member 'Profiler'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CPUProfilerModel.js(158,41): error TS2694: Namespace 'Protocol' has no exported member 'Profiler'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CPUProfilerModel.js(173,112): error TS2694: Namespace 'Protocol' has no exported member 'Profiler'.
-node_modules/chrome-devtools-frontend/front_end/sdk/CPUProfilerModel.js(173,183): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/sdk/CPUProfilerModel.js(174,22): error TS2339: Property 'EventData' does not exist on type 'typeof CPUProfilerModel'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CSSMatchedStyles.js(11,24): error TS2694: Namespace 'Protocol' has no exported member 'CSS'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CSSMatchedStyles.js(12,24): error TS2694: Namespace 'Protocol' has no exported member 'CSS'.
@@ -10492,10 +10158,10 @@ node_modules/chrome-devtools-frontend/front_end/sdk/CSSMatchedStyles.js(50,78):
 node_modules/chrome-devtools-frontend/front_end/sdk/CSSMatchedStyles.js(77,81): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Regular: string; Inline: string; Attributes: string; }'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CSSMatchedStyles.js(241,53): error TS2339: Property 'media' does not exist on type 'CSSRule'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CSSMatchedStyles.js(264,31): error TS2694: Namespace 'Protocol' has no exported member 'DOM'.
-node_modules/chrome-devtools-frontend/front_end/sdk/CSSMatchedStyles.js(317,37): error TS2694: Namespace 'CSSMatchedStyles' has no exported member 'PropertyState'.
+node_modules/chrome-devtools-frontend/front_end/sdk/CSSMatchedStyles.js(317,37): error TS2694: Namespace 'SDK.CSSMatchedStyles' has no exported member 'PropertyState'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CSSMatchedStyles.js(322,58): error TS2339: Property 'valuesArray' does not exist on type 'Map<any, any>'.
-node_modules/chrome-devtools-frontend/front_end/sdk/CSSMatchedStyles.js(329,61): error TS2694: Namespace 'CSSMatchedStyles' has no exported member 'PropertyState'.
-node_modules/chrome-devtools-frontend/front_end/sdk/CSSMatchedStyles.js(335,59): error TS2694: Namespace 'CSSMatchedStyles' has no exported member 'PropertyState'.
+node_modules/chrome-devtools-frontend/front_end/sdk/CSSMatchedStyles.js(329,61): error TS2694: Namespace 'SDK.CSSMatchedStyles' has no exported member 'PropertyState'.
+node_modules/chrome-devtools-frontend/front_end/sdk/CSSMatchedStyles.js(335,59): error TS2694: Namespace 'SDK.CSSMatchedStyles' has no exported member 'PropertyState'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CSSMatchedStyles.js(352,46): error TS2345: Argument of type 'CSSRule' is not assignable to parameter of type 'CSSStyleRule'.
   Property 'media' is missing in type 'CSSRule'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CSSMatchedStyles.js(367,32): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Active: string; Overloaded: string; }'.
@@ -10529,15 +10195,12 @@ node_modules/chrome-devtools-frontend/front_end/sdk/CSSModel.js(262,24): error T
 node_modules/chrome-devtools-frontend/front_end/sdk/CSSModel.js(268,34): error TS2345: Argument of type 'number' is not assignable to parameter of type '{ [x: string]: any; WindowDocked: number; WindowUndocked: number; ScriptsBreakpointSet: number; T...'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CSSModel.js(290,41): error TS2694: Namespace 'Protocol' has no exported member 'CSS'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CSSModel.js(328,24): error TS2694: Namespace 'Protocol' has no exported member 'DOM'.
-node_modules/chrome-devtools-frontend/front_end/sdk/CSSModel.js(334,27): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CSSModel.js(348,24): error TS2694: Namespace 'Protocol' has no exported member 'CSS'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CSSModel.js(356,24): error TS2694: Namespace 'Protocol' has no exported member 'DOM'.
-node_modules/chrome-devtools-frontend/front_end/sdk/CSSModel.js(365,38): error TS2694: Namespace 'CSSModel' has no exported member 'ContrastInfo'.
-node_modules/chrome-devtools-frontend/front_end/sdk/CSSModel.js(369,27): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
+node_modules/chrome-devtools-frontend/front_end/sdk/CSSModel.js(365,38): error TS2694: Namespace 'SDK.CSSModel' has no exported member 'ContrastInfo'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CSSModel.js(377,41): error TS2694: Namespace 'Protocol' has no exported member 'CSS'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CSSModel.js(387,45): error TS2339: Property 'valuesArray' does not exist on type 'Map<string, CSSStyleSheetHeader>'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CSSModel.js(406,24): error TS2694: Namespace 'Protocol' has no exported member 'DOM'.
-node_modules/chrome-devtools-frontend/front_end/sdk/CSSModel.js(412,27): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CSSModel.js(415,71): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Regular: string; Inline: string; Attributes: string; }'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CSSModel.js(417,75): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Regular: string; Inline: string; Attributes: string; }'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CSSModel.js(460,24): error TS2694: Namespace 'Protocol' has no exported member 'CSS'.
@@ -10561,9 +10224,7 @@ node_modules/chrome-devtools-frontend/front_end/sdk/CSSModel.js(674,24): error T
 node_modules/chrome-devtools-frontend/front_end/sdk/CSSModel.js(687,46): error TS2339: Property 'valuesArray' does not exist on type 'Map<string, CSSStyleSheetHeader>'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CSSModel.js(751,34): error TS2694: Namespace 'Protocol' has no exported member 'CSS'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CSSModel.js(751,75): error TS2694: Namespace 'Protocol' has no exported member 'CSS'.
-node_modules/chrome-devtools-frontend/front_end/sdk/CSSModel.js(751,112): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/sdk/CSSModel.js(752,14): error TS2339: Property 'RuleUsage' does not exist on type 'typeof CSSModel'.
-node_modules/chrome-devtools-frontend/front_end/sdk/CSSModel.js(754,136): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/sdk/CSSModel.js(755,14): error TS2339: Property 'ContrastInfo' does not exist on type 'typeof CSSModel'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CSSModel.js(778,24): error TS2694: Namespace 'Protocol' has no exported member 'CSS'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CSSModel.js(848,24): error TS2694: Namespace 'Protocol' has no exported member 'CSS'.
@@ -10578,15 +10239,11 @@ node_modules/chrome-devtools-frontend/front_end/sdk/CSSProperty.js(156,36): erro
 node_modules/chrome-devtools-frontend/front_end/sdk/CSSProperty.js(168,56): error TS2339: Property 'sprintf' does not exist on type 'StringConstructor'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CSSProperty.js(170,17): error TS2339: Property 'runtime' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CSSProperty.js(200,5): error TS2554: Expected 1 arguments, but got 2.
-node_modules/chrome-devtools-frontend/front_end/sdk/CSSProperty.js(259,22): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/sdk/CSSProperty.js(259,32): error TS2339: Property 'lineIndent' does not exist on type 'typeof TextUtils'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CSSRule.js(9,24): error TS2694: Namespace 'Protocol' has no exported member 'CSS'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CSSRule.js(33,32): error TS2694: Namespace 'Protocol' has no exported member 'CSS'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CSSRule.js(33,98): error TS2694: Namespace 'Protocol' has no exported member 'CSS'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CSSRule.js(44,83): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Regular: string; Inline: string; Attributes: string; }'.
-node_modules/chrome-devtools-frontend/front_end/sdk/CSSRule.js(70,37): error TS2339: Property 'CSS' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/CSSRule.js(77,37): error TS2339: Property 'CSS' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/CSSRule.js(84,37): error TS2339: Property 'CSS' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/CSSRule.js(91,37): error TS2339: Property 'CSS' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CSSRule.js(108,24): error TS2694: Namespace 'Protocol' has no exported member 'CSS'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CSSRule.js(131,64): error TS2694: Namespace 'Protocol' has no exported member 'CSS'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CSSRule.js(135,24): error TS2694: Namespace 'Protocol' has no exported member 'CSS'.
@@ -10598,20 +10255,22 @@ node_modules/chrome-devtools-frontend/front_end/sdk/CSSRule.js(258,24): error TS
 node_modules/chrome-devtools-frontend/front_end/sdk/CSSRule.js(273,24): error TS2694: Namespace 'Protocol' has no exported member 'CSS'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CSSRule.js(287,50): error TS2694: Namespace 'Protocol' has no exported member 'CSS'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CSSStyleDeclaration.js(8,24): error TS2694: Namespace 'Protocol' has no exported member 'CSS'.
-node_modules/chrome-devtools-frontend/front_end/sdk/CSSStyleDeclaration.js(9,39): error TS2694: Namespace 'CSSStyleDeclaration' has no exported member 'Type'.
+node_modules/chrome-devtools-frontend/front_end/sdk/CSSStyleDeclaration.js(9,39): error TS2694: Namespace 'SDK.CSSStyleDeclaration' has no exported member 'Type'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CSSStyleDeclaration.js(41,47): error TS2694: Namespace 'Protocol' has no exported member 'CSS'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CSSStyleDeclaration.js(50,24): error TS2694: Namespace 'Protocol' has no exported member 'CSS'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CSSStyleSheetHeader.js(11,24): error TS2694: Namespace 'Protocol' has no exported member 'CSS'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CSSStyleSheetHeader.js(40,5): error TS2322: Type 'StaticContentProvider' is not assignable to type '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CSSStyleSheetHeader.js(40,5): error TS2322: Type 'StaticContentProvider' is not assignable to type '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
   Property '_contentURL' does not exist on type '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
-node_modules/chrome-devtools-frontend/front_end/sdk/Connections.js(10,52): error TS2694: Namespace 'Connection' has no exported member 'Params'.
-node_modules/chrome-devtools-frontend/front_end/sdk/Connections.js(30,29): error TS2339: Property 'sendMessageToBackend' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/sdk/Connections.js(10,52): error TS2694: Namespace 'Protocol.InspectorBackend.Connection' has no exported member 'Params'.
+node_modules/chrome-devtools-frontend/front_end/sdk/Connections.js(17,29): error TS2551: Property 'events' does not exist on type 'typeof InspectorFrontendHostAPI'. Did you mean 'Events'?
+node_modules/chrome-devtools-frontend/front_end/sdk/Connections.js(19,29): error TS2551: Property 'events' does not exist on type 'typeof InspectorFrontendHostAPI'. Did you mean 'Events'?
+node_modules/chrome-devtools-frontend/front_end/sdk/Connections.js(30,29): error TS2339: Property 'sendMessageToBackend' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/sdk/Connections.js(34,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/sdk/Connections.js(41,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/sdk/Connections.js(71,27): error TS2339: Property 'reattach' does not exist on type 'typeof InspectorFrontendHost'.
-node_modules/chrome-devtools-frontend/front_end/sdk/Connections.js(87,52): error TS2694: Namespace 'Connection' has no exported member 'Params'.
-node_modules/chrome-devtools-frontend/front_end/sdk/Connections.js(168,52): error TS2694: Namespace 'Connection' has no exported member 'Params'.
+node_modules/chrome-devtools-frontend/front_end/sdk/Connections.js(71,27): error TS2339: Property 'reattach' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/sdk/Connections.js(87,52): error TS2694: Namespace 'Protocol.InspectorBackend.Connection' has no exported member 'Params'.
+node_modules/chrome-devtools-frontend/front_end/sdk/Connections.js(168,52): error TS2694: Namespace 'Protocol.InspectorBackend.Connection' has no exported member 'Params'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CookieModel.js(14,24): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CookieModel.js(40,27): error TS2339: Property 'asParsedURL' does not exist on type 'string'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CookieModel.js(65,26): error TS2339: Property 'networkAgent' does not exist on type 'Target'.
@@ -10621,26 +10280,24 @@ node_modules/chrome-devtools-frontend/front_end/sdk/CookieModel.js(114,38): erro
 node_modules/chrome-devtools-frontend/front_end/sdk/CookieModel.js(129,38): error TS2339: Property 'networkAgent' does not exist on type 'Target'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CookieParser.js(79,29): error TS2345: Argument of type 'number' is not assignable to parameter of type '{ [x: string]: any; Request: number; Response: number; }'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CookieParser.js(97,29): error TS2345: Argument of type 'number' is not assignable to parameter of type '{ [x: string]: any; Request: number; Response: number; }'.
-node_modules/chrome-devtools-frontend/front_end/sdk/CookieParser.js(161,26): error TS2694: Namespace 'Cookie' has no exported member 'Type'.
-node_modules/chrome-devtools-frontend/front_end/sdk/CookieParser.js(200,26): error TS2694: Namespace 'Cookie' has no exported member 'Type'.
-node_modules/chrome-devtools-frontend/front_end/sdk/CookieParser.js(225,27): error TS2694: Namespace 'Cookie' has no exported member 'Type'.
+node_modules/chrome-devtools-frontend/front_end/sdk/CookieParser.js(161,26): error TS2694: Namespace 'SDK.Cookie' has no exported member 'Type'.
+node_modules/chrome-devtools-frontend/front_end/sdk/CookieParser.js(200,26): error TS2694: Namespace 'SDK.Cookie' has no exported member 'Type'.
+node_modules/chrome-devtools-frontend/front_end/sdk/CookieParser.js(225,27): error TS2694: Namespace 'SDK.Cookie' has no exported member 'Type'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CookieParser.js(246,25): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CookieParser.js(250,33): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
 node_modules/chrome-devtools-frontend/front_end/sdk/CookieParser.js(325,53): error TS2363: The right-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type.
 node_modules/chrome-devtools-frontend/front_end/sdk/DOMDebuggerModel.js(11,26): error TS2339: Property 'domdebuggerAgent' does not exist on type 'Target'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DOMDebuggerModel.js(69,50): error TS2694: Namespace 'DOMBreakpoint' has no exported member 'Type'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DOMDebuggerModel.js(78,50): error TS2694: Namespace 'DOMBreakpoint' has no exported member 'Type'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DOMDebuggerModel.js(98,50): error TS2694: Namespace 'DOMBreakpoint' has no exported member 'Type'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DOMDebuggerModel.js(154,59): error TS2694: Namespace 'DOMBreakpoint' has no exported member 'Type'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DOMDebuggerModel.js(190,60): error TS2694: Namespace 'DOMBreakpoint' has no exported member 'Type'.
+node_modules/chrome-devtools-frontend/front_end/sdk/DOMDebuggerModel.js(69,50): error TS2694: Namespace 'SDK.DOMDebuggerModel.DOMBreakpoint' has no exported member 'Type'.
+node_modules/chrome-devtools-frontend/front_end/sdk/DOMDebuggerModel.js(78,50): error TS2694: Namespace 'SDK.DOMDebuggerModel.DOMBreakpoint' has no exported member 'Type'.
+node_modules/chrome-devtools-frontend/front_end/sdk/DOMDebuggerModel.js(98,50): error TS2694: Namespace 'SDK.DOMDebuggerModel.DOMBreakpoint' has no exported member 'Type'.
+node_modules/chrome-devtools-frontend/front_end/sdk/DOMDebuggerModel.js(154,59): error TS2694: Namespace 'SDK.DOMDebuggerModel.DOMBreakpoint' has no exported member 'Type'.
+node_modules/chrome-devtools-frontend/front_end/sdk/DOMDebuggerModel.js(190,60): error TS2694: Namespace 'SDK.DOMDebuggerModel.DOMBreakpoint' has no exported member 'Type'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DOMDebuggerModel.js(232,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DOMDebuggerModel.js(264,50): error TS2694: Namespace 'DOMBreakpoint' has no exported member 'Type'.
+node_modules/chrome-devtools-frontend/front_end/sdk/DOMDebuggerModel.js(264,50): error TS2694: Namespace 'SDK.DOMDebuggerModel.DOMBreakpoint' has no exported member 'Type'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DOMDebuggerModel.js(275,24): error TS2694: Namespace 'Protocol' has no exported member 'DOMDebugger'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DOMDebuggerModel.js(275,55): error TS1003: Identifier expected.
-node_modules/chrome-devtools-frontend/front_end/sdk/DOMDebuggerModel.js(276,52): error TS2339: Property 'DOMDebugger' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DOMDebuggerModel.js(292,33): error TS2694: Namespace 'EventListener' has no exported member 'Origin'.
+node_modules/chrome-devtools-frontend/front_end/sdk/DOMDebuggerModel.js(292,33): error TS2694: Namespace 'SDK.EventListener' has no exported member 'Origin'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DOMDebuggerModel.js(387,7): error TS2322: Type 'Promise<void>' is not assignable to type 'Promise<undefined>'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DOMDebuggerModel.js(466,34): error TS2694: Namespace 'EventListener' has no exported member 'Origin'.
+node_modules/chrome-devtools-frontend/front_end/sdk/DOMDebuggerModel.js(466,34): error TS2694: Namespace 'SDK.EventListener' has no exported member 'Origin'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DOMDebuggerModel.js(469,5): error TS2322: Type 'string | { [x: string]: any; Raw: string; Framework: string; FrameworkUser: string; }' is not assignable to type '{ [x: string]: any; Raw: string; Framework: string; FrameworkUser: string; }'.
   Type 'string' is not assignable to type '{ [x: string]: any; Raw: string; Framework: string; FrameworkUser: string; }'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DOMDebuggerModel.js(578,9): error TS2555: Expected at least 2 arguments, but got 1.
@@ -10682,29 +10339,14 @@ node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(137,28): error T
 node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(138,53): error TS2339: Property 'body' does not exist on type 'DOMDocument'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(139,28): error TS2339: Property 'body' does not exist on type 'DOMDocument'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(369,33): error TS2694: Namespace 'Protocol' has no exported member 'Error'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(373,30): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(376,36): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(396,33): error TS2694: Namespace 'Protocol' has no exported member 'Error'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(400,30): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(403,36): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(419,33): error TS2694: Namespace 'Protocol' has no exported member 'Error'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(423,30): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(426,36): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(433,33): error TS2694: Namespace 'Protocol' has no exported member 'Error'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(437,30): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(440,36): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(447,33): error TS2694: Namespace 'Protocol' has no exported member 'Error'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(454,35): error TS2694: Namespace 'DOMNode' has no exported member 'Attribute'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(466,27): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(484,34): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(495,30): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
+node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(454,35): error TS2694: Namespace 'SDK.DOMNode' has no exported member 'Attribute'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(507,33): error TS2694: Namespace 'Protocol' has no exported member 'Error'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(511,30): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(514,36): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(519,33): error TS2694: Namespace 'Protocol' has no exported member 'Error'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(523,30): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(526,36): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(536,29): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(536,29): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(554,31): error TS2339: Property 'index' does not exist on type 'DOMNode'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(555,16): error TS2339: Property 'index' does not exist on type 'DOMNode'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(590,25): error TS2694: Namespace 'Protocol' has no exported member 'Page'.
@@ -10715,18 +10357,15 @@ node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(687,32): error T
 node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(743,24): error TS2339: Property 'remove' does not exist on type 'any[]'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(751,33): error TS2694: Namespace 'Protocol' has no exported member 'Error'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(751,50): error TS2694: Namespace 'Protocol' has no exported member 'DOM'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(758,34): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(761,40): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(768,33): error TS2694: Namespace 'Protocol' has no exported member 'Error'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(775,34): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(778,40): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(852,31): error TS2339: Property 'baseURL' does not exist on type 'DOMNode'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(853,65): error TS2339: Property 'baseURL' does not exist on type 'DOMNode'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(860,24): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(880,34): error TS2694: Namespace 'Protocol' has no exported member 'DOM'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(896,7): error TS2322: Type 'DOMNode' is not assignable to type 'this'.
+node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(928,12): error TS2339: Property 'scrollIntoViewIfNeeded' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(940,29): error TS2339: Property 'pageAgent' does not exist on type 'Target'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(969,66): error TS1003: Identifier expected.
+node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(947,12): error TS2339: Property 'focus' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(970,13): error TS2339: Property 'Attribute' does not exist on type 'typeof DOMNode'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(1042,24): error TS2694: Namespace 'Protocol' has no exported member 'DOM'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(1062,26): error TS2339: Property 'domAgent' does not exist on type 'Target'.
@@ -10766,8 +10405,6 @@ node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(1425,24): error
 node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(1426,24): error TS2694: Namespace 'Protocol' has no exported member 'DOM'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(1442,24): error TS2694: Namespace 'Protocol' has no exported member 'DOM'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(1443,32): error TS2694: Namespace 'Protocol' has no exported member 'DOM'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(1477,28): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(1479,30): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(1501,24): error TS2694: Namespace 'Protocol' has no exported member 'DOM'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(1509,24): error TS2694: Namespace 'Protocol' has no exported member 'DOM'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(1511,34): error TS2694: Namespace 'Protocol' has no exported member 'DOM'.
@@ -10799,19 +10436,12 @@ node_modules/chrome-devtools-frontend/front_end/sdk/DOMModel.js(1801,17): error
 node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(41,12): error TS2339: Property 'registerDebuggerDispatcher' does not exist on type 'Target'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(42,26): error TS2339: Property 'debuggerAgent' does not exist on type 'Target'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(231,24): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(250,43): error TS2694: Namespace 'DebuggerModel' has no exported member 'SetBreakpointResult'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(267,27): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(281,43): error TS2694: Namespace 'DebuggerModel' has no exported member 'SetBreakpointResult'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(286,35): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(304,43): error TS2694: Namespace 'DebuggerModel' has no exported member 'SetBreakpointResult'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(310,27): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
+node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(250,43): error TS2694: Namespace 'SDK.DebuggerModel' has no exported member 'SetBreakpointResult'.
+node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(281,43): error TS2694: Namespace 'SDK.DebuggerModel' has no exported member 'SetBreakpointResult'.
+node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(304,43): error TS2694: Namespace 'SDK.DebuggerModel' has no exported member 'SetBreakpointResult'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(319,24): error TS2694: Namespace 'Protocol' has no exported member 'Debugger'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(324,27): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(325,73): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(340,27): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(346,24): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(347,34): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(351,30): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(355,24): error TS2694: Namespace 'Protocol' has no exported member 'Debugger'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(356,24): error TS2694: Namespace 'Protocol' has no exported member 'Debugger'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(389,24): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
@@ -10836,19 +10466,16 @@ node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(540,24): er
 node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(546,24): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(700,24): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(711,24): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(763,32): error TS2694: Namespace 'RuntimeModel' has no exported member 'EvaluationOptions'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(764,42): error TS2694: Namespace 'RuntimeModel' has no exported member 'EvaluationResult'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(772,43): error TS2694: Namespace 'DebuggerModel' has no exported member 'FunctionDetails'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(780,36): error TS2694: Namespace 'DebuggerModel' has no exported member 'FunctionDetails'.
+node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(763,32): error TS2694: Namespace 'SDK.RuntimeModel' has no exported member 'EvaluationOptions'.
+node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(764,42): error TS2694: Namespace 'SDK.RuntimeModel' has no exported member 'EvaluationResult'.
+node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(772,43): error TS2694: Namespace 'SDK.DebuggerModel' has no exported member 'FunctionDetails'.
+node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(780,36): error TS2694: Namespace 'SDK.DebuggerModel' has no exported member 'FunctionDetails'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(816,24): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(822,35): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(829,24): error TS2694: Namespace 'Protocol' has no exported member 'Debugger'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(830,31): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(838,24): error TS2694: Namespace 'Protocol' has no exported member 'Debugger'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(839,31): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(852,35): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(899,22): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(907,78): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(908,19): error TS2339: Property 'FunctionDetails' does not exist on type 'typeof DebuggerModel'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(967,2): error TS1131: Property or signature expected.
 node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(971,19): error TS2339: Property 'SetBreakpointResult' does not exist on type 'typeof DebuggerModel'.
@@ -10868,34 +10495,17 @@ node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(1111,26): e
 node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(1148,24): error TS2694: Namespace 'Protocol' has no exported member 'Debugger'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(1158,24): error TS2694: Namespace 'Protocol' has no exported member 'Debugger'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(1174,24): error TS2694: Namespace 'Protocol' has no exported member 'Debugger'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(1186,37): error TS2339: Property 'Debugger' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(1197,32): error TS2694: Namespace 'Protocol' has no exported member 'Debugger'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(1263,35): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(1266,27): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(1294,32): error TS2694: Namespace 'RuntimeModel' has no exported member 'EvaluationOptions'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(1295,42): error TS2694: Namespace 'RuntimeModel' has no exported member 'EvaluationResult'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(1308,35): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(1321,28): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(1368,21): error TS2339: Property 'Debugger' does not exist on type 'typeof Protocol'.
+node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(1294,32): error TS2694: Namespace 'SDK.RuntimeModel' has no exported member 'EvaluationOptions'.
+node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(1295,42): error TS2694: Namespace 'SDK.RuntimeModel' has no exported member 'EvaluationResult'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(1369,16): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(1370,21): error TS2339: Property 'Debugger' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(1371,16): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(1372,21): error TS2339: Property 'Debugger' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(1373,16): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(1374,21): error TS2339: Property 'Debugger' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(1375,16): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(1376,21): error TS2339: Property 'Debugger' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(1377,16): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(1378,21): error TS2339: Property 'Debugger' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(1379,16): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(1380,21): error TS2339: Property 'Debugger' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(1381,16): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(1382,21): error TS2339: Property 'Debugger' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(1383,16): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(1419,33): error TS2339: Property 'Debugger' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(1419,84): error TS2339: Property 'Debugger' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(1435,33): error TS2339: Property 'Debugger' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(1435,84): error TS2339: Property 'Debugger' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(1446,32): error TS2694: Namespace 'Protocol' has no exported member 'Debugger'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(1450,24): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
 node_modules/chrome-devtools-frontend/front_end/sdk/DebuggerModel.js(1451,24): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
@@ -10908,19 +10518,17 @@ node_modules/chrome-devtools-frontend/front_end/sdk/EmulationModel.js(13,43): er
 node_modules/chrome-devtools-frontend/front_end/sdk/EmulationModel.js(51,24): error TS2694: Namespace 'Protocol' has no exported member 'PageAgent'.
 node_modules/chrome-devtools-frontend/front_end/sdk/EmulationModel.js(65,5): error TS2322: Type 'OverlayModel' is not assignable to type '{ [x: string]: any; highlightDOMNode(node: DOMNode, config: any, backendNodeId?: any, objectId?: ...'.
   Type 'OverlayModel' is not assignable to type '{ [x: string]: any; highlightDOMNode(node: DOMNode, config: any, backendNodeId?: any, objectId?: ...'.
+    Property '_domModel' does not exist on type '{ [x: string]: any; highlightDOMNode(node: DOMNode, config: any, backendNodeId?: any, objectId?: ...'.
 node_modules/chrome-devtools-frontend/front_end/sdk/EmulationModel.js(65,5): error TS2322: Type 'OverlayModel' is not assignable to type '{ [x: string]: any; highlightDOMNode(node: DOMNode, config: any, backendNodeId?: any, objectId?: ...'.
   Type 'OverlayModel' is not assignable to type '{ [x: string]: any; highlightDOMNode(node: DOMNode, config: any, backendNodeId?: any, objectId?: ...'.
-    Property '_domModel' does not exist on type '{ [x: string]: any; highlightDOMNode(node: DOMNode, config: any, backendNodeId?: any, objectId?: ...'.
-node_modules/chrome-devtools-frontend/front_end/sdk/EmulationModel.js(148,5): error TS2322: Type '{ [x: string]: any; enabled: boolean; configuration: string; }' is not assignable to type '{ [x: string]: any; enabled: boolean; configuration: string; scriptId: string; }'.
 node_modules/chrome-devtools-frontend/front_end/sdk/EmulationModel.js(148,5): error TS2322: Type '{ [x: string]: any; enabled: boolean; configuration: string; }' is not assignable to type '{ [x: string]: any; enabled: boolean; configuration: string; scriptId: string; }'.
   Property 'scriptId' is missing in type '{ [x: string]: any; enabled: boolean; configuration: string; }'.
+node_modules/chrome-devtools-frontend/front_end/sdk/EmulationModel.js(148,5): error TS2322: Type '{ [x: string]: any; enabled: boolean; configuration: string; }' is not assignable to type '{ [x: string]: any; enabled: boolean; configuration: string; scriptId: string; }'.
 node_modules/chrome-devtools-frontend/front_end/sdk/FilmStripModel.js(77,30): error TS2339: Property 'upperBound' does not exist on type 'Frame[]'.
 node_modules/chrome-devtools-frontend/front_end/sdk/HeapProfilerModel.js(10,12): error TS2339: Property 'registerHeapProfilerDispatcher' does not exist on type 'Target'.
 node_modules/chrome-devtools-frontend/front_end/sdk/HeapProfilerModel.js(12,38): error TS2339: Property 'heapProfilerAgent' does not exist on type 'Target'.
 node_modules/chrome-devtools-frontend/front_end/sdk/HeapProfilerModel.js(44,34): error TS2694: Namespace 'Protocol' has no exported member 'HeapProfiler'.
 node_modules/chrome-devtools-frontend/front_end/sdk/LayerTreeBase.js(5,25): error TS2694: Namespace 'Protocol' has no exported member 'DOM'.
-node_modules/chrome-devtools-frontend/front_end/sdk/LayerTreeBase.js(8,1): error TS1003: Identifier expected.
-node_modules/chrome-devtools-frontend/front_end/sdk/LayerTreeBase.js(9,5): error TS2339: Property 'SnapshotWithRect' does not exist on type 'typeof SDK'.
 node_modules/chrome-devtools-frontend/front_end/sdk/LayerTreeBase.js(18,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 node_modules/chrome-devtools-frontend/front_end/sdk/LayerTreeBase.js(23,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 node_modules/chrome-devtools-frontend/front_end/sdk/LayerTreeBase.js(28,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
@@ -10957,41 +10565,29 @@ node_modules/chrome-devtools-frontend/front_end/sdk/LogModel.js(15,29): error TS
 node_modules/chrome-devtools-frontend/front_end/sdk/LogModel.js(28,24): error TS2694: Namespace 'Protocol' has no exported member 'Log'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(41,33): error TS2339: Property 'networkAgent' does not exist on type 'Target'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(42,12): error TS2339: Property 'registerNetworkDispatcher' does not exist on type 'Target'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(105,44): error TS2694: Namespace 'NetworkRequest' has no exported member 'ContentData'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(116,35): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(121,34): error TS2694: Namespace 'NetworkManager' has no exported member 'Conditions'.
+node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(105,44): error TS2694: Namespace 'SDK.NetworkRequest' has no exported member 'ContentData'.
+node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(121,34): error TS2694: Namespace 'SDK.NetworkManager' has no exported member 'Conditions'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(122,25): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(127,23): error TS2339: Property 'Network' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(128,36): error TS2551: Property '_connectionTypes' does not exist on type 'typeof NetworkManager'. Did you mean '_connectionType'?
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(130,26): error TS2551: Property '_connectionTypes' does not exist on type 'typeof NetworkManager'. Did you mean '_connectionType'?
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(131,34): error TS2551: Property '_connectionTypes' does not exist on type 'typeof NetworkManager'. Did you mean '_connectionType'?
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(132,34): error TS2339: Property 'Network' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(133,34): error TS2339: Property 'Network' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(134,34): error TS2339: Property 'Network' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(135,41): error TS2339: Property 'Network' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(136,36): error TS2339: Property 'Network' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(137,37): error TS2339: Property 'Network' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(143,21): error TS2339: Property 'Network' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(166,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(198,71): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(199,20): error TS2339: Property 'Message' does not exist on type 'typeof NetworkManager'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(214,2): error TS1131: Property or signature expected.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(220,20): error TS2300: Duplicate identifier 'Conditions'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(220,20): error TS2339: Property 'Conditions' does not exist on type 'typeof NetworkManager'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(222,32): error TS2694: Namespace 'NetworkManager' has no exported member 'Conditions'.
+node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(222,32): error TS2694: Namespace 'SDK.NetworkManager' has no exported member 'Conditions'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(224,10): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(230,32): error TS2694: Namespace 'NetworkManager' has no exported member 'Conditions'.
+node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(230,32): error TS2694: Namespace 'SDK.NetworkManager' has no exported member 'Conditions'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(232,10): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(238,32): error TS2694: Namespace 'NetworkManager' has no exported member 'Conditions'.
+node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(238,32): error TS2694: Namespace 'SDK.NetworkManager' has no exported member 'Conditions'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(240,10): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(246,32): error TS2694: Namespace 'NetworkManager' has no exported member 'Conditions'.
+node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(246,32): error TS2694: Namespace 'SDK.NetworkManager' has no exported member 'Conditions'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(248,10): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(254,48): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(255,20): error TS2339: Property 'BlockedPattern' does not exist on type 'typeof NetworkManager'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(276,24): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(277,43): error TS2694: Namespace 'NetworkRequest' has no exported member 'NameValue'.
+node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(277,43): error TS2694: Namespace 'SDK.NetworkRequest' has no exported member 'NameValue'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(291,24): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(298,76): error TS2339: Property 'Security' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(304,24): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(322,20): error TS2339: Property 'connectionReused' does not exist on type 'NetworkRequest'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(382,24): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
@@ -11006,8 +10602,6 @@ node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(400,24): e
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(401,24): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(402,24): error TS2694: Namespace 'Protocol' has no exported member 'Page'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(403,24): error TS2694: Namespace 'Protocol' has no exported member 'Page'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(412,65): error TS2339: Property 'Page' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(423,70): error TS2339: Property 'Page' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(430,24): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(442,24): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(443,24): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
@@ -11023,7 +10617,6 @@ node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(520,24): e
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(521,24): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(522,24): error TS2694: Namespace 'Protocol' has no exported member 'Page'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(525,24): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(537,38): error TS2339: Property 'Network' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(549,24): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(551,24): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(562,24): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
@@ -11060,22 +10653,22 @@ node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(777,24): e
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(779,24): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(782,24): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(799,31): error TS2694: Namespace 'Protocol' has no exported member 'NetworkAgent'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(801,36): error TS2694: Namespace 'NetworkManager' has no exported member 'Conditions'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(812,57): error TS2694: Namespace 'MultitargetNetworkManager' has no exported member 'RequestInterceptor'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(812,108): error TS2694: Namespace 'MultitargetNetworkManager' has no exported member 'InterceptionPattern'.
+node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(801,36): error TS2694: Namespace 'SDK.NetworkManager' has no exported member 'Conditions'.
+node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(812,57): error TS2694: Namespace 'SDK.MultitargetNetworkManager' has no exported member 'RequestInterceptor'.
+node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(812,108): error TS2694: Namespace 'SDK.MultitargetNetworkManager' has no exported member 'InterceptionPattern'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(827,21): error TS2339: Property 'sprintf' does not exist on type 'StringConstructor'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(836,31): error TS2339: Property 'networkAgent' does not exist on type 'Target'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(844,75): error TS2339: Property 'valuesArray' does not exist on type 'Multimap'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(855,32): error TS2339: Property 'networkAgent' does not exist on type 'Target'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(874,34): error TS2694: Namespace 'NetworkManager' has no exported member 'Conditions'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(884,35): error TS2694: Namespace 'NetworkManager' has no exported member 'Conditions'.
+node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(874,34): error TS2694: Namespace 'SDK.NetworkManager' has no exported member 'Conditions'.
+node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(884,35): error TS2694: Namespace 'SDK.NetworkManager' has no exported member 'Conditions'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(891,24): error TS2694: Namespace 'Protocol' has no exported member 'NetworkAgent'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(905,24): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(955,42): error TS2694: Namespace 'NetworkManager' has no exported member 'BlockedPattern'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(976,41): error TS2694: Namespace 'NetworkManager' has no exported member 'BlockedPattern'.
+node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(955,42): error TS2694: Namespace 'SDK.NetworkManager' has no exported member 'BlockedPattern'.
+node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(976,41): error TS2694: Namespace 'SDK.NetworkManager' has no exported member 'BlockedPattern'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(1015,46): error TS2339: Property 'size' does not exist on type 'Multimap'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(1019,52): error TS2694: Namespace 'MultitargetNetworkManager' has no exported member 'InterceptionPattern'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(1020,45): error TS2694: Namespace 'MultitargetNetworkManager' has no exported member 'RequestInterceptor'.
+node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(1019,52): error TS2694: Namespace 'SDK.MultitargetNetworkManager' has no exported member 'InterceptionPattern'.
+node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(1020,45): error TS2694: Namespace 'SDK.MultitargetNetworkManager' has no exported member 'RequestInterceptor'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(1025,37): error TS2339: Property 'deleteAll' does not exist on type 'Multimap'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(1027,39): error TS2339: Property 'set' does not exist on type 'Multimap'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(1050,82): error TS2339: Property 'valuesArray' does not exist on type 'Multimap'.
@@ -11088,13 +10681,14 @@ node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(1119,24):
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(1122,24): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(1123,24): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(1125,24): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
+node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(1185,21): error TS2339: Property 'substring' does not exist on type 'string | ArrayBuffer'.
+  Property 'substring' does not exist on type 'ArrayBuffer'.
+node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(1185,38): error TS2339: Property 'indexOf' does not exist on type 'string | ArrayBuffer'.
+  Property 'indexOf' does not exist on type 'ArrayBuffer'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(1196,24): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(1205,44): error TS2694: Namespace 'NetworkRequest' has no exported member 'ContentData'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(1210,35): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
+node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(1205,44): error TS2694: Namespace 'SDK.NetworkRequest' has no exported member 'ContentData'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(1215,66): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(1215,94): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(1216,31): error TS2339: Property 'InterceptionPattern' does not exist on type 'typeof MultitargetNetworkManager'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(1218,86): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkManager.js(1219,31): error TS2339: Property 'RequestInterceptor' does not exist on type 'typeof MultitargetNetworkManager'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(36,24): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(39,24): error TS2694: Namespace 'Protocol' has no exported member 'Page'.
@@ -11103,16 +10697,14 @@ node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(41,24): er
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(51,26): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(58,26): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(66,26): error TS2694: Namespace 'Protocol' has no exported member 'Security'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(67,38): error TS2339: Property 'Security' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(69,26): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(71,26): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(76,45): error TS2694: Namespace 'NetworkRequest' has no exported member 'ContentData'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(78,44): error TS2694: Namespace 'NetworkRequest' has no exported member 'WebSocketFrame'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(80,44): error TS2694: Namespace 'NetworkRequest' has no exported member 'EventSourceMessage'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(87,43): error TS2694: Namespace 'NetworkRequest' has no exported member 'NameValue'.
+node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(76,45): error TS2694: Namespace 'SDK.NetworkRequest' has no exported member 'ContentData'.
+node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(78,44): error TS2694: Namespace 'SDK.NetworkRequest' has no exported member 'WebSocketFrame'.
+node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(80,44): error TS2694: Namespace 'SDK.NetworkRequest' has no exported member 'EventSourceMessage'.
+node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(87,43): error TS2694: Namespace 'SDK.NetworkRequest' has no exported member 'NameValue'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(94,26): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(97,26): error TS2694: Namespace 'Protocol' has no exported member 'Security'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(98,36): error TS2339: Property 'Security' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(99,26): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(119,25): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(126,24): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
@@ -11129,35 +10721,31 @@ node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(415,24): e
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(466,25): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(473,24): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(543,82): error TS2339: Property 'asParsedURL' does not exist on type 'string'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(615,43): error TS2694: Namespace 'NetworkRequest' has no exported member 'NameValue'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(622,42): error TS2694: Namespace 'NetworkRequest' has no exported member 'NameValue'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(709,43): error TS2694: Namespace 'NetworkRequest' has no exported member 'NameValue'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(716,42): error TS2694: Namespace 'NetworkRequest' has no exported member 'NameValue'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(745,43): error TS2694: Namespace 'NetworkRequest' has no exported member 'NameValue'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(815,43): error TS2694: Namespace 'NetworkRequest' has no exported member 'NameValue'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(828,43): error TS2694: Namespace 'NetworkRequest' has no exported member 'NameValue'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(860,43): error TS2694: Namespace 'NetworkRequest' has no exported member 'NameValue'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(874,42): error TS2694: Namespace 'NetworkRequest' has no exported member 'NameValue'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(895,44): error TS2694: Namespace 'NetworkRequest' has no exported member 'ContentData'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(908,54): error TS2694: Namespace 'NetworkRequest' has no exported member 'ContentData'.
+node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(615,43): error TS2694: Namespace 'SDK.NetworkRequest' has no exported member 'NameValue'.
+node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(622,42): error TS2694: Namespace 'SDK.NetworkRequest' has no exported member 'NameValue'.
+node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(709,43): error TS2694: Namespace 'SDK.NetworkRequest' has no exported member 'NameValue'.
+node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(716,42): error TS2694: Namespace 'SDK.NetworkRequest' has no exported member 'NameValue'.
+node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(745,43): error TS2694: Namespace 'SDK.NetworkRequest' has no exported member 'NameValue'.
+node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(815,43): error TS2694: Namespace 'SDK.NetworkRequest' has no exported member 'NameValue'.
+node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(828,43): error TS2694: Namespace 'SDK.NetworkRequest' has no exported member 'NameValue'.
+node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(860,43): error TS2694: Namespace 'SDK.NetworkRequest' has no exported member 'NameValue'.
+node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(874,42): error TS2694: Namespace 'SDK.NetworkRequest' has no exported member 'NameValue'.
+node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(895,44): error TS2694: Namespace 'SDK.NetworkRequest' has no exported member 'ContentData'.
+node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(908,54): error TS2694: Namespace 'SDK.NetworkRequest' has no exported member 'ContentData'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(980,24): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(987,25): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(994,24): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(1001,25): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(1019,13): error TS2339: Property 'src' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(1026,25): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(1033,43): error TS2694: Namespace 'NetworkRequest' has no exported member 'WebSocketFrame'.
+node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(1033,43): error TS2694: Namespace 'SDK.NetworkRequest' has no exported member 'WebSocketFrame'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(1054,24): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(1070,34): error TS2694: Namespace 'NetworkRequest' has no exported member 'WebSocketFrame'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(1078,43): error TS2694: Namespace 'NetworkRequest' has no exported member 'EventSourceMessage'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(1117,47): error TS1003: Identifier expected.
+node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(1070,34): error TS2694: Namespace 'SDK.NetworkRequest' has no exported member 'WebSocketFrame'.
+node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(1078,43): error TS2694: Namespace 'SDK.NetworkRequest' has no exported member 'EventSourceMessage'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(1118,20): error TS2339: Property 'NameValue' does not exist on type 'typeof NetworkRequest'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(1127,42): error TS2694: Namespace 'NetworkRequest' has no exported member 'WebSocketFrameType'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(1127,122): error TS1003: Identifier expected.
+node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(1127,42): error TS2694: Namespace 'SDK.NetworkRequest' has no exported member 'WebSocketFrameType'.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(1128,20): error TS2339: Property 'WebSocketFrame' does not exist on type 'typeof NetworkRequest'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(1130,82): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(1131,20): error TS2339: Property 'EventSourceMessage' does not exist on type 'typeof NetworkRequest'.
-node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(1133,70): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/sdk/NetworkRequest.js(1134,20): error TS2339: Property 'ContentData' does not exist on type 'typeof NetworkRequest'.
 node_modules/chrome-devtools-frontend/front_end/sdk/OverlayModel.js(16,12): error TS2339: Property 'registerOverlayDispatcher' does not exist on type 'Target'.
 node_modules/chrome-devtools-frontend/front_end/sdk/OverlayModel.js(17,33): error TS2339: Property 'overlayAgent' does not exist on type 'Target'.
@@ -11171,7 +10759,6 @@ node_modules/chrome-devtools-frontend/front_end/sdk/OverlayModel.js(81,22): erro
 node_modules/chrome-devtools-frontend/front_end/sdk/OverlayModel.js(85,22): error TS2339: Property '_highlightDisabled' does not exist on type 'typeof OverlayModel'.
 node_modules/chrome-devtools-frontend/front_end/sdk/OverlayModel.js(110,9): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/sdk/OverlayModel.js(123,24): error TS2694: Namespace 'Protocol' has no exported member 'Overlay'.
-node_modules/chrome-devtools-frontend/front_end/sdk/OverlayModel.js(128,50): error TS2339: Property 'Overlay' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/OverlayModel.js(141,24): error TS2694: Namespace 'Protocol' has no exported member 'DOM'.
 node_modules/chrome-devtools-frontend/front_end/sdk/OverlayModel.js(143,24): error TS2694: Namespace 'Protocol' has no exported member 'DOM'.
 node_modules/chrome-devtools-frontend/front_end/sdk/OverlayModel.js(144,24): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
@@ -11203,12 +10790,8 @@ node_modules/chrome-devtools-frontend/front_end/sdk/OverlayModel.js(317,24): err
 node_modules/chrome-devtools-frontend/front_end/sdk/OverlayModel.js(326,24): error TS2694: Namespace 'Protocol' has no exported member 'Page'.
 node_modules/chrome-devtools-frontend/front_end/sdk/PaintProfiler.js(37,35): error TS2339: Property 'layerTreeAgent' does not exist on type 'Target'.
 node_modules/chrome-devtools-frontend/front_end/sdk/PaintProfiler.js(41,27): error TS2694: Namespace 'SDK' has no exported member 'PictureFragment'.
-node_modules/chrome-devtools-frontend/front_end/sdk/PaintProfiler.js(72,2): error TS1003: Identifier expected.
-node_modules/chrome-devtools-frontend/front_end/sdk/PaintProfiler.js(73,5): error TS2339: Property 'PictureFragment' does not exist on type 'typeof SDK'.
 node_modules/chrome-devtools-frontend/front_end/sdk/PaintProfiler.js(108,24): error TS2694: Namespace 'Protocol' has no exported member 'DOM'.
 node_modules/chrome-devtools-frontend/front_end/sdk/PaintProfiler.js(109,41): error TS2694: Namespace 'Protocol' has no exported member 'LayerTree'.
-node_modules/chrome-devtools-frontend/front_end/sdk/PaintProfiler.js(126,2): error TS1003: Identifier expected.
-node_modules/chrome-devtools-frontend/front_end/sdk/PaintProfiler.js(127,5): error TS2339: Property 'RawPaintProfilerLogItem' does not exist on type 'typeof SDK'.
 node_modules/chrome-devtools-frontend/front_end/sdk/PaintProfiler.js(134,19): error TS2694: Namespace 'SDK' has no exported member 'RawPaintProfilerLogItem'.
 node_modules/chrome-devtools-frontend/front_end/sdk/PerformanceMetricsModel.js(11,26): error TS2339: Property 'performanceAgent' does not exist on type 'Target'.
 node_modules/chrome-devtools-frontend/front_end/sdk/PerformanceMetricsModel.js(29,41): error TS2694: Namespace 'Protocol' has no exported member 'Performance'.
@@ -11217,21 +10800,15 @@ node_modules/chrome-devtools-frontend/front_end/sdk/ProfileTreeModel.js(12,26):
 node_modules/chrome-devtools-frontend/front_end/sdk/ProfileTreeModel.js(80,10): error TS2339: Property 'depth' does not exist on type 'ProfileNode'.
 node_modules/chrome-devtools-frontend/front_end/sdk/ProfileTreeModel.js(86,26): error TS2339: Property 'depth' does not exist on type 'ProfileNode'.
 node_modules/chrome-devtools-frontend/front_end/sdk/ProfileTreeModel.js(93,15): error TS2339: Property 'depth' does not exist on type 'ProfileNode'.
-node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(32,2): error TS1003: Identifier expected.
-node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(33,5): error TS2339: Property 'CallFunctionResult' does not exist on type 'typeof SDK'.
-node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(45,5): error TS2322: Type 'LocalJSONObject' is not assignable to type 'RemoteObject'.
 node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(45,5): error TS2322: Type 'LocalJSONObject' is not assignable to type 'RemoteObject'.
   Types of property 'callFunctionJSON' are incompatible.
     Type '(functionDeclaration: (this: any) => any, args: any[], callback: (arg0: any) => any) => void' is not assignable to type '<T>(functionDeclaration: (this: any, ...arg1: any[]) => T, args: any[], callback: (arg0: T) => an...'.
       Types of parameters 'functionDeclaration' and 'functionDeclaration' are incompatible.
+node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(45,5): error TS2322: Type 'LocalJSONObject' is not assignable to type 'RemoteObject'.
 node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(73,42): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
 node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(73,73): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
 node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(87,24): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
 node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(88,25): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
-node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(97,47): error TS2339: Property 'Runtime' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(99,47): error TS2339: Property 'Runtime' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(101,47): error TS2339: Property 'Runtime' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(103,47): error TS2339: Property 'Runtime' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(158,27): error TS2339: Property 'valuesArray' does not exist on type 'Map<any, any>'.
 node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(189,25): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
 node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(195,26): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
@@ -11253,36 +10830,24 @@ node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(420,24): err
 node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(422,24): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
 node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(423,24): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
 node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(429,48): error TS2339: Property 'runtimeAgent' does not exist on type 'Target'.
-node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(448,46): error TS2339: Property 'Runtime' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(449,46): error TS2339: Property 'Runtime' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(450,46): error TS2339: Property 'Runtime' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(451,46): error TS2339: Property 'Runtime' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(465,25): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
 node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(473,25): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
 node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(521,25): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
 node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(586,26): error TS2694: Namespace 'Protocol' has no exported member 'RuntimeAgent'.
-node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(590,29): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(612,28): error TS2339: Property 'getter' does not exist on type 'RemoteObjectProperty'.
 node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(614,28): error TS2339: Property 'setter' does not exist on type 'RemoteObjectProperty'.
 node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(636,31): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
-node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(645,27): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(646,32): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(663,24): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
 node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(664,24): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
-node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(677,35): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(683,24): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
-node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(694,27): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(695,32): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(703,39): error TS1110: Type expected.
 node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(704,32): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
-node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(718,33): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(728,32): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
 node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(731,3): error TS2416: Property 'callFunctionJSON' in type 'RemoteObjectImpl' is not assignable to the same property in base type 'RemoteObject'.
   Type '(functionDeclaration: (this: any) => any, args: any[], callback: (arg0: any) => any) => void' is not assignable to type '<T>(functionDeclaration: (this: any, ...arg1: any[]) => T, args: any[], callback: (arg0: T) => an...'.
+    Types of parameters 'functionDeclaration' and 'functionDeclaration' are incompatible.
 node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(731,3): error TS2416: Property 'callFunctionJSON' in type 'RemoteObjectImpl' is not assignable to the same property in base type 'RemoteObject'.
   Type '(functionDeclaration: (this: any) => any, args: any[], callback: (arg0: any) => any) => void' is not assignable to type '<T>(functionDeclaration: (this: any, ...arg1: any[]) => T, args: any[], callback: (arg0: T) => an...'.
-    Types of parameters 'functionDeclaration' and 'functionDeclaration' are incompatible.
-node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(741,52): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(795,24): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
 node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(797,24): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
 node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(850,24): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
@@ -11295,19 +10860,19 @@ node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(1153,31): er
 node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(1176,31): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
 node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(1179,3): error TS2416: Property 'callFunctionJSON' in type 'LocalJSONObject' is not assignable to the same property in base type 'RemoteObject'.
   Type '(functionDeclaration: (this: any) => any, args: any[], callback: (arg0: any) => any) => void' is not assignable to type '<T>(functionDeclaration: (this: any, ...arg1: any[]) => T, args: any[], callback: (arg0: T) => an...'.
+    Types of parameters 'functionDeclaration' and 'functionDeclaration' are incompatible.
 node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(1179,3): error TS2416: Property 'callFunctionJSON' in type 'LocalJSONObject' is not assignable to the same property in base type 'RemoteObject'.
   Type '(functionDeclaration: (this: any) => any, args: any[], callback: (arg0: any) => any) => void' is not assignable to type '<T>(functionDeclaration: (this: any, ...arg1: any[]) => T, args: any[], callback: (arg0: T) => an...'.
-    Types of parameters 'functionDeclaration' and 'functionDeclaration' are incompatible.
 node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(1234,21): error TS2694: Namespace 'SDK' has no exported member 'CallFunctionResult'.
 node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(1265,21): error TS2694: Namespace 'SDK' has no exported member 'CallFunctionResult'.
+node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(1325,5): error TS2322: Type 'Promise<{ properties: RemoteObjectProperty[]; internalProperties: RemoteObjectProperty[]; }>' is not assignable to type 'Promise<RemoteObject>'.
 node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(1325,5): error TS2322: Type 'Promise<{ properties: RemoteObjectProperty[]; internalProperties: RemoteObjectProperty[]; }>' is not assignable to type 'Promise<RemoteObject>'.
   Type '{ properties: RemoteObjectProperty[]; internalProperties: RemoteObjectProperty[]; }' is not assignable to type 'RemoteObject'.
     Property 'customPreview' is missing in type '{ properties: RemoteObjectProperty[]; internalProperties: RemoteObjectProperty[]; }'.
-node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(1325,5): error TS2322: Type 'Promise<{ properties: RemoteObjectProperty[]; internalProperties: RemoteObjectProperty[]; }>' is not assignable to type 'Promise<RemoteObject>'.
-node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(1345,43): error TS2694: Namespace 'DebuggerModel' has no exported member 'FunctionDetails'.
-node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(1352,45): error TS2694: Namespace 'DebuggerModel' has no exported member 'FunctionDetails'.
-node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(1363,35): error TS2694: Namespace 'DebuggerModel' has no exported member 'FunctionDetails'.
-node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(1364,36): error TS2694: Namespace 'DebuggerModel' has no exported member 'FunctionDetails'.
+node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(1345,43): error TS2694: Namespace 'SDK.DebuggerModel' has no exported member 'FunctionDetails'.
+node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(1352,45): error TS2694: Namespace 'SDK.DebuggerModel' has no exported member 'FunctionDetails'.
+node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(1363,35): error TS2694: Namespace 'SDK.DebuggerModel' has no exported member 'FunctionDetails'.
+node_modules/chrome-devtools-frontend/front_end/sdk/RemoteObject.js(1364,36): error TS2694: Namespace 'SDK.DebuggerModel' has no exported member 'FunctionDetails'.
 node_modules/chrome-devtools-frontend/front_end/sdk/Resource.js(38,24): error TS2694: Namespace 'Protocol' has no exported member 'Page'.
 node_modules/chrome-devtools-frontend/front_end/sdk/Resource.js(39,24): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
 node_modules/chrome-devtools-frontend/front_end/sdk/Resource.js(56,55): error TS2339: Property 'isValid' does not exist on type 'Date'.
@@ -11317,7 +10882,6 @@ node_modules/chrome-devtools-frontend/front_end/sdk/Resource.js(128,25): error T
 node_modules/chrome-devtools-frontend/front_end/sdk/Resource.js(224,57): error TS2339: Property 'pageAgent' does not exist on type 'Target'.
 node_modules/chrome-devtools-frontend/front_end/sdk/Resource.js(241,13): error TS2339: Property 'src' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/sdk/Resource.js(263,61): error TS2339: Property 'pageAgent' does not exist on type 'Target'.
-node_modules/chrome-devtools-frontend/front_end/sdk/Resource.js(265,41): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/ResourceTreeModel.js(44,26): error TS2339: Property 'pageAgent' does not exist on type 'Target'.
 node_modules/chrome-devtools-frontend/front_end/sdk/ResourceTreeModel.js(48,12): error TS2339: Property 'registerPageDispatcher' does not exist on type 'Target'.
 node_modules/chrome-devtools-frontend/front_end/sdk/ResourceTreeModel.js(117,24): error TS2694: Namespace 'Protocol' has no exported member 'Page'.
@@ -11333,10 +10897,8 @@ node_modules/chrome-devtools-frontend/front_end/sdk/ResourceTreeModel.js(294,25)
 node_modules/chrome-devtools-frontend/front_end/sdk/ResourceTreeModel.js(308,24): error TS2694: Namespace 'Protocol' has no exported member 'Page'.
 node_modules/chrome-devtools-frontend/front_end/sdk/ResourceTreeModel.js(334,24): error TS2694: Namespace 'Protocol' has no exported member 'Page'.
 node_modules/chrome-devtools-frontend/front_end/sdk/ResourceTreeModel.js(385,67): error TS2694: Namespace 'Protocol' has no exported member 'Page'.
-node_modules/chrome-devtools-frontend/front_end/sdk/ResourceTreeModel.js(389,27): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/ResourceTreeModel.js(395,24): error TS2694: Namespace 'Protocol' has no exported member 'Page'.
 node_modules/chrome-devtools-frontend/front_end/sdk/ResourceTreeModel.js(402,57): error TS2694: Namespace 'Protocol' has no exported member 'Page'.
-node_modules/chrome-devtools-frontend/front_end/sdk/ResourceTreeModel.js(406,27): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/ResourceTreeModel.js(501,24): error TS2694: Namespace 'Protocol' has no exported member 'Page'.
 node_modules/chrome-devtools-frontend/front_end/sdk/ResourceTreeModel.js(502,24): error TS2694: Namespace 'Protocol' has no exported member 'Page'.
 node_modules/chrome-devtools-frontend/front_end/sdk/ResourceTreeModel.js(503,24): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
@@ -11376,24 +10938,16 @@ node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(184,5): erro
     Type '(functionDeclaration: (this: any) => any, args: any[], callback: (arg0: any) => any) => void' is not assignable to type '<T>(functionDeclaration: (this: any, ...arg1: any[]) => T, args: any[], callback: (arg0: T) => an...'.
       Types of parameters 'functionDeclaration' and 'functionDeclaration' are incompatible.
 node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(184,5): error TS2322: Type 'ScopeRemoteObject' is not assignable to type 'RemoteObject'.
-node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(199,40): error TS2339: Property 'Runtime' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(201,40): error TS2339: Property 'Runtime' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(203,40): error TS2339: Property 'Runtime' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(205,40): error TS2339: Property 'Runtime' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(209,5): error TS2322: Type 'RemoteObjectImpl' is not assignable to type 'RemoteObject'.
 node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(237,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(249,42): error TS2694: Namespace 'RuntimeModel' has no exported member 'CompileScriptResult'.
-node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(259,27): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(260,39): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
+node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(249,42): error TS2694: Namespace 'SDK.RuntimeModel' has no exported member 'CompileScriptResult'.
 node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(267,24): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
-node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(275,42): error TS2694: Namespace 'RuntimeModel' has no exported member 'EvaluationResult'.
-node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(291,35): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(301,42): error TS2694: Namespace 'RuntimeModel' has no exported member 'QueryObjectResult'.
-node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(308,35): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
+node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(275,42): error TS2694: Namespace 'SDK.RuntimeModel' has no exported member 'EvaluationResult'.
+node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(301,42): error TS2694: Namespace 'SDK.RuntimeModel' has no exported member 'QueryObjectResult'.
 node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(317,24): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
-node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(344,35): error TS2694: Namespace 'DebuggerModel' has no exported member 'FunctionDetails'.
-node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(360,29): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHost'.
-node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(364,80): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(344,35): error TS2694: Namespace 'SDK.DebuggerModel' has no exported member 'FunctionDetails'.
+node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(360,29): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(364,80): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(398,24): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
 node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(414,24): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
 node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(430,32): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
@@ -11401,7 +10955,6 @@ node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(433,24): err
 node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(449,24): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
 node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(458,24): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
 node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(484,54): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
-node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(484,81): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(485,18): error TS2339: Property 'ExceptionWithTimestamp' does not exist on type 'typeof RuntimeModel'.
 node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(488,2): error TS1131: Property or signature expected.
 node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(492,18): error TS2339: Property 'CompileScriptResult' does not exist on type 'typeof RuntimeModel'.
@@ -11419,20 +10972,17 @@ node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(569,24): err
 node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(587,32): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
 node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(590,24): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
 node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(599,24): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
-node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(670,32): error TS2694: Namespace 'RuntimeModel' has no exported member 'EvaluationOptions'.
-node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(673,42): error TS2694: Namespace 'RuntimeModel' has no exported member 'EvaluationResult'.
-node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(685,42): error TS2694: Namespace 'RuntimeModel' has no exported member 'EvaluationResult'.
-node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(701,32): error TS2694: Namespace 'RuntimeModel' has no exported member 'EvaluationOptions'.
-node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(704,42): error TS2694: Namespace 'RuntimeModel' has no exported member 'EvaluationResult'.
-node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(724,35): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(737,30): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
+node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(670,32): error TS2694: Namespace 'SDK.RuntimeModel' has no exported member 'EvaluationOptions'.
+node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(673,42): error TS2694: Namespace 'SDK.RuntimeModel' has no exported member 'EvaluationResult'.
+node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(685,42): error TS2694: Namespace 'SDK.RuntimeModel' has no exported member 'EvaluationResult'.
+node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(701,32): error TS2694: Namespace 'SDK.RuntimeModel' has no exported member 'EvaluationOptions'.
+node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(704,42): error TS2694: Namespace 'SDK.RuntimeModel' has no exported member 'EvaluationResult'.
 node_modules/chrome-devtools-frontend/front_end/sdk/RuntimeModel.js(767,33): error TS2339: Property 'asParsedURL' does not exist on type 'string'.
 node_modules/chrome-devtools-frontend/front_end/sdk/ScreenCaptureModel.js(14,26): error TS2339: Property 'pageAgent' does not exist on type 'Target'.
 node_modules/chrome-devtools-frontend/front_end/sdk/ScreenCaptureModel.js(15,44): error TS2694: Namespace 'Protocol' has no exported member 'Page'.
 node_modules/chrome-devtools-frontend/front_end/sdk/ScreenCaptureModel.js(19,12): error TS2339: Property 'registerPageDispatcher' does not exist on type 'Target'.
 node_modules/chrome-devtools-frontend/front_end/sdk/ScreenCaptureModel.js(28,41): error TS2694: Namespace 'Protocol' has no exported member 'Page'.
 node_modules/chrome-devtools-frontend/front_end/sdk/ScreenCaptureModel.js(46,24): error TS2694: Namespace 'Protocol' has no exported member 'Page'.
-node_modules/chrome-devtools-frontend/front_end/sdk/ScreenCaptureModel.js(58,27): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/ScreenCaptureModel.js(72,24): error TS2694: Namespace 'Protocol' has no exported member 'Page'.
 node_modules/chrome-devtools-frontend/front_end/sdk/ScreenCaptureModel.js(106,24): error TS2694: Namespace 'Protocol' has no exported member 'Page'.
 node_modules/chrome-devtools-frontend/front_end/sdk/ScreenCaptureModel.js(107,24): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
@@ -11456,13 +11006,10 @@ node_modules/chrome-devtools-frontend/front_end/sdk/Script.js(190,95): error TS2
 node_modules/chrome-devtools-frontend/front_end/sdk/Script.js(190,127): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
 node_modules/chrome-devtools-frontend/front_end/sdk/Script.js(190,158): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
 node_modules/chrome-devtools-frontend/front_end/sdk/Script.js(203,54): error TS2339: Property 'debuggerAgent' does not exist on type 'Target'.
-node_modules/chrome-devtools-frontend/front_end/sdk/Script.js(206,28): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/Script.js(211,27): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/Script.js(247,31): error TS2694: Namespace 'Protocol' has no exported member 'Debugger'.
 node_modules/chrome-devtools-frontend/front_end/sdk/Script.js(251,54): error TS2339: Property 'debuggerAgent' does not exist on type 'Target'.
-node_modules/chrome-devtools-frontend/front_end/sdk/Script.js(253,35): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/SecurityOriginManager.js(41,34): error TS2339: Property 'valuesArray' does not exist on type 'Set<string>'.
-node_modules/chrome-devtools-frontend/front_end/sdk/ServerTiming.js(20,41): error TS2694: Namespace 'NetworkRequest' has no exported member 'NameValue'.
+node_modules/chrome-devtools-frontend/front_end/sdk/ServerTiming.js(20,41): error TS2694: Namespace 'SDK.NetworkRequest' has no exported member 'NameValue'.
 node_modules/chrome-devtools-frontend/front_end/sdk/ServerTiming.js(110,26): error TS2554: Expected 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/sdk/ServerTiming.js(129,32): error TS2345: Argument of type 'TemplateStringsArray' is not assignable to parameter of type 'string | string[]'.
   Type 'TemplateStringsArray' is not assignable to type 'string[]'.
@@ -11477,17 +11024,11 @@ node_modules/chrome-devtools-frontend/front_end/sdk/ServerTiming.js(186,25): err
 node_modules/chrome-devtools-frontend/front_end/sdk/ServiceWorkerCacheModel.js(15,12): error TS2339: Property 'registerStorageDispatcher' does not exist on type 'Target'.
 node_modules/chrome-devtools-frontend/front_end/sdk/ServiceWorkerCacheModel.js(20,31): error TS2339: Property 'cacheStorageAgent' does not exist on type 'Target'.
 node_modules/chrome-devtools-frontend/front_end/sdk/ServiceWorkerCacheModel.js(21,33): error TS2339: Property 'storageAgent' does not exist on type 'Target'.
-node_modules/chrome-devtools-frontend/front_end/sdk/ServiceWorkerCacheModel.js(68,27): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/ServiceWorkerCacheModel.js(69,108): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/ServiceWorkerCacheModel.js(83,28): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/ServiceWorkerCacheModel.js(87,27): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/ServiceWorkerCacheModel.js(94,41): error TS2694: Namespace 'Protocol' has no exported member 'CacheStorage'.
 node_modules/chrome-devtools-frontend/front_end/sdk/ServiceWorkerCacheModel.js(151,36): error TS2339: Property 'asParsedURL' does not exist on type 'string'.
 node_modules/chrome-devtools-frontend/front_end/sdk/ServiceWorkerCacheModel.js(203,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/sdk/ServiceWorkerCacheModel.js(211,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/sdk/ServiceWorkerCacheModel.js(236,40): error TS2694: Namespace 'Protocol' has no exported member 'CacheStorage'.
-node_modules/chrome-devtools-frontend/front_end/sdk/ServiceWorkerCacheModel.js(240,27): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/ServiceWorkerCacheModel.js(241,99): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/ServiceWorkerCacheModel.js(332,34): error TS2694: Namespace 'Protocol' has no exported member 'CacheStorage'.
 node_modules/chrome-devtools-frontend/front_end/sdk/ServiceWorkerManager.js(40,12): error TS2339: Property 'registerServiceWorkerDispatcher' does not exist on type 'Target'.
 node_modules/chrome-devtools-frontend/front_end/sdk/ServiceWorkerManager.js(42,26): error TS2339: Property 'serviceWorkerAgent' does not exist on type 'Target'.
@@ -11499,18 +11040,6 @@ node_modules/chrome-devtools-frontend/front_end/sdk/ServiceWorkerManager.js(277,
 node_modules/chrome-devtools-frontend/front_end/sdk/ServiceWorkerManager.js(285,24): error TS2694: Namespace 'Protocol' has no exported member 'ServiceWorker'.
 node_modules/chrome-devtools-frontend/front_end/sdk/ServiceWorkerManager.js(298,24): error TS2694: Namespace 'Protocol' has no exported member 'ServiceWorker'.
 node_modules/chrome-devtools-frontend/front_end/sdk/ServiceWorkerManager.js(306,24): error TS2694: Namespace 'Protocol' has no exported member 'ServiceWorker'.
-node_modules/chrome-devtools-frontend/front_end/sdk/ServiceWorkerManager.js(334,44): error TS2339: Property 'ServiceWorker' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/ServiceWorkerManager.js(335,34): error TS2339: Property 'ServiceWorker' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/ServiceWorkerManager.js(342,44): error TS2339: Property 'ServiceWorker' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/ServiceWorkerManager.js(349,44): error TS2339: Property 'ServiceWorker' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/ServiceWorkerManager.js(356,44): error TS2339: Property 'ServiceWorker' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/ServiceWorkerManager.js(363,44): error TS2339: Property 'ServiceWorker' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/ServiceWorkerManager.js(370,37): error TS2339: Property 'ServiceWorker' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/ServiceWorkerManager.js(377,37): error TS2339: Property 'ServiceWorker' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/ServiceWorkerManager.js(384,37): error TS2339: Property 'ServiceWorker' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/ServiceWorkerManager.js(391,37): error TS2339: Property 'ServiceWorker' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/ServiceWorkerManager.js(398,37): error TS2339: Property 'ServiceWorker' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sdk/ServiceWorkerManager.js(405,37): error TS2339: Property 'ServiceWorker' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sdk/ServiceWorkerManager.js(437,24): error TS2694: Namespace 'Protocol' has no exported member 'ServiceWorker'.
 node_modules/chrome-devtools-frontend/front_end/sdk/ServiceWorkerManager.js(444,33): error TS2694: Namespace 'Protocol' has no exported member 'ServiceWorker'.
 node_modules/chrome-devtools-frontend/front_end/sdk/ServiceWorkerManager.js(449,24): error TS2694: Namespace 'Protocol' has no exported member 'ServiceWorker'.
@@ -11535,9 +11064,9 @@ node_modules/chrome-devtools-frontend/front_end/sdk/SourceMap.js(272,30): error
 node_modules/chrome-devtools-frontend/front_end/sdk/SourceMap.js(284,7): error TS2322: Type 'StaticContentProvider' is not assignable to type '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
 node_modules/chrome-devtools-frontend/front_end/sdk/SourceMap.js(284,7): error TS2322: Type 'StaticContentProvider' is not assignable to type '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
   Property '_contentURL' does not exist on type '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
-node_modules/chrome-devtools-frontend/front_end/sdk/SourceMap.js(285,5): error TS2322: Type 'CompilerSourceMappingContentProvider' is not assignable to type '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
 node_modules/chrome-devtools-frontend/front_end/sdk/SourceMap.js(285,5): error TS2322: Type 'CompilerSourceMappingContentProvider' is not assignable to type '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
   Property '_sourceURL' does not exist on type '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
+node_modules/chrome-devtools-frontend/front_end/sdk/SourceMap.js(285,5): error TS2322: Type 'CompilerSourceMappingContentProvider' is not assignable to type '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
 node_modules/chrome-devtools-frontend/front_end/sdk/SourceMap.js(325,26): error TS2339: Property 'upperBound' does not exist on type 'SourceMapEntry[]'.
 node_modules/chrome-devtools-frontend/front_end/sdk/SourceMap.js(338,26): error TS2339: Property 'lowerBound' does not exist on type 'SourceMapEntry[]'.
 node_modules/chrome-devtools-frontend/front_end/sdk/SourceMap.js(339,25): error TS2339: Property 'upperBound' does not exist on type 'SourceMapEntry[]'.
@@ -11556,20 +11085,26 @@ node_modules/chrome-devtools-frontend/front_end/sdk/SourceMapManager.js(86,42):
 node_modules/chrome-devtools-frontend/front_end/sdk/SourceMapManager.js(87,47): error TS2339: Property 'get' does not exist on type 'Multimap'.
 node_modules/chrome-devtools-frontend/front_end/sdk/SourceMapManager.js(141,45): error TS2339: Property 'has' does not exist on type 'Multimap'.
 node_modules/chrome-devtools-frontend/front_end/sdk/SourceMapManager.js(146,40): error TS2339: Property 'set' does not exist on type 'Multimap'.
+node_modules/chrome-devtools-frontend/front_end/sdk/SourceMapManager.js(157,56): error TS2345: Argument of type 'TextSourceMap' is not assignable to parameter of type '{ [x: string]: any; compiledURL(): string; url(): string; sourceURLs(): string[]; sourceContentPr...'.
+  Property '_json' does not exist on type '{ [x: string]: any; compiledURL(): string; url(): string; sourceURLs(): string[]; sourceContentPr...'.
 node_modules/chrome-devtools-frontend/front_end/sdk/SourceMapManager.js(159,36): error TS2352: Type 'TextSourceMap' cannot be converted to type '{ [x: string]: any; compiledURL(): string; url(): string; sourceURLs(): string[]; sourceContentPr...'.
   Property '_json' does not exist on type '{ [x: string]: any; compiledURL(): string; url(): string; sourceURLs(): string[]; sourceContentPr...'.
 node_modules/chrome-devtools-frontend/front_end/sdk/SourceMapManager.js(159,36): error TS2352: Type 'TextSourceMap' cannot be converted to type '{ [x: string]: any; compiledURL(): string; url(): string; sourceURLs(): string[]; sourceContentPr...'.
+node_modules/chrome-devtools-frontend/front_end/sdk/SourceMapManager.js(163,12): error TS2339: Property 'catchException' does not exist on type 'Promise<any>'.
+node_modules/chrome-devtools-frontend/front_end/sdk/SourceMapManager.js(173,56): error TS2339: Property 'get' does not exist on type 'Multimap'.
+node_modules/chrome-devtools-frontend/front_end/sdk/SourceMapManager.js(174,42): error TS2339: Property 'deleteAll' does not exist on type 'Multimap'.
+node_modules/chrome-devtools-frontend/front_end/sdk/SourceMapManager.js(193,35): error TS2339: Property 'set' does not exist on type 'Multimap'.
 node_modules/chrome-devtools-frontend/front_end/sdk/SourceMapManager.js(208,39): error TS2339: Property 'runtime' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/sdk/SourceMapManager.js(210,31): error TS2339: Property 'containsAll' does not exist on type 'Set<any>'.
 node_modules/chrome-devtools-frontend/front_end/sdk/SourceMapManager.js(227,38): error TS2339: Property 'hasValue' does not exist on type 'Multimap'.
 node_modules/chrome-devtools-frontend/front_end/sdk/SourceMapManager.js(228,46): error TS2339: Property 'delete' does not exist on type 'Multimap'.
 node_modules/chrome-devtools-frontend/front_end/sdk/SourceMapManager.js(232,33): error TS2339: Property 'delete' does not exist on type 'Multimap'.
 node_modules/chrome-devtools-frontend/front_end/sdk/SourceMapManager.js(234,38): error TS2339: Property 'has' does not exist on type 'Multimap'.
-node_modules/chrome-devtools-frontend/front_end/sdk/Target.js(16,52): error TS2694: Namespace 'Connection' has no exported member 'Factory'.
+node_modules/chrome-devtools-frontend/front_end/sdk/Target.js(16,52): error TS2694: Namespace 'Protocol.InspectorBackend.Connection' has no exported member 'Factory'.
 node_modules/chrome-devtools-frontend/front_end/sdk/Target.js(148,48): error TS2339: Property 'valuesArray' does not exist on type 'Map<any, any>'.
 node_modules/chrome-devtools-frontend/front_end/sdk/Target.js(173,20): error TS1005: '>' expected.
 node_modules/chrome-devtools-frontend/front_end/sdk/Target.js(191,34): error TS2339: Property 'asParsedURL' does not exist on type 'string'.
-node_modules/chrome-devtools-frontend/front_end/sdk/Target.js(194,29): error TS2339: Property 'inspectedURLChanged' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/sdk/Target.js(194,29): error TS2339: Property 'inspectedURLChanged' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/sdk/Target.js(308,17): error TS1005: '>' expected.
 node_modules/chrome-devtools-frontend/front_end/sdk/TargetManager.js(15,120): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/sdk/TargetManager.js(17,21): error TS1005: '>' expected.
@@ -11582,7 +11117,7 @@ node_modules/chrome-devtools-frontend/front_end/sdk/TargetManager.js(177,42): er
 node_modules/chrome-devtools-frontend/front_end/sdk/TargetManager.js(199,20): error TS2538: Type 'symbol' cannot be used as an index type.
 node_modules/chrome-devtools-frontend/front_end/sdk/TargetManager.js(208,27): error TS2538: Type 'symbol' cannot be used as an index type.
 node_modules/chrome-devtools-frontend/front_end/sdk/TargetManager.js(209,21): error TS2339: Property 'remove' does not exist on type '{ [x: string]: any; targetAdded(target: Target): void; targetRemoved(target: Target): void; }[]'.
-node_modules/chrome-devtools-frontend/front_end/sdk/TargetManager.js(216,52): error TS2694: Namespace 'Connection' has no exported member 'Factory'.
+node_modules/chrome-devtools-frontend/front_end/sdk/TargetManager.js(216,52): error TS2694: Namespace 'Protocol.InspectorBackend.Connection' has no exported member 'Factory'.
 node_modules/chrome-devtools-frontend/front_end/sdk/TargetManager.js(221,33): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; targetAdded(target: Target): void; targetRemoved(target: Target): void; } & {...'.
   Type 'TargetManager' is not assignable to type '{ [x: string]: any; targetAdded(target: Target): void; targetRemoved(target: Target): void; } & {...'.
     Type 'TargetManager' is not assignable to type '{ [x: string]: any; targetAdded(target: Target): void; targetRemoved(target: Target): void; }'.
@@ -11606,52 +11141,53 @@ node_modules/chrome-devtools-frontend/front_end/sdk/TargetManager.js(332,72): er
 node_modules/chrome-devtools-frontend/front_end/sdk/TargetManager.js(333,36): error TS2345: Argument of type 'number' is not assignable to parameter of type '{ [x: string]: any; WindowDocked: number; WindowUndocked: number; ScriptsBreakpointSet: number; T...'.
 node_modules/chrome-devtools-frontend/front_end/sdk/TargetManager.js(347,36): error TS2345: Argument of type 'number' is not assignable to parameter of type '{ [x: string]: any; WindowDocked: number; WindowUndocked: number; ScriptsBreakpointSet: number; T...'.
 node_modules/chrome-devtools-frontend/front_end/sdk/TargetManager.js(351,35): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/sdk/TargetManager.js(356,52): error TS2694: Namespace 'Connection' has no exported member 'Params'.
-node_modules/chrome-devtools-frontend/front_end/sdk/TargetManager.js(364,7): error TS2322: Type 'WebSocketConnection' is not assignable to type '{ [x: string]: any; sendMessage(message: string): void; disconnect(): Promise<any>; }'.
+node_modules/chrome-devtools-frontend/front_end/sdk/TargetManager.js(356,52): error TS2694: Namespace 'Protocol.InspectorBackend.Connection' has no exported member 'Params'.
 node_modules/chrome-devtools-frontend/front_end/sdk/TargetManager.js(364,7): error TS2322: Type 'WebSocketConnection' is not assignable to type '{ [x: string]: any; sendMessage(message: string): void; disconnect(): Promise<any>; }'.
   Property '_socket' does not exist on type '{ [x: string]: any; sendMessage(message: string): void; disconnect(): Promise<any>; }'.
-node_modules/chrome-devtools-frontend/front_end/sdk/TargetManager.js(365,38): error TS2339: Property 'isHostedMode' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/sdk/TargetManager.js(364,7): error TS2322: Type 'WebSocketConnection' is not assignable to type '{ [x: string]: any; sendMessage(message: string): void; disconnect(): Promise<any>; }'.
+node_modules/chrome-devtools-frontend/front_end/sdk/TargetManager.js(365,38): error TS2339: Property 'isHostedMode' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/sdk/TargetManager.js(366,7): error TS2322: Type 'StubConnection' is not assignable to type '{ [x: string]: any; sendMessage(message: string): void; disconnect(): Promise<any>; }'.
-  Property '_onMessage' does not exist on type '{ [x: string]: any; sendMessage(message: string): void; disconnect(): Promise<any>; }'.
 node_modules/chrome-devtools-frontend/front_end/sdk/TargetManager.js(366,7): error TS2322: Type 'StubConnection' is not assignable to type '{ [x: string]: any; sendMessage(message: string): void; disconnect(): Promise<any>; }'.
-node_modules/chrome-devtools-frontend/front_end/sdk/TargetManager.js(368,7): error TS2322: Type 'MainConnection' is not assignable to type '{ [x: string]: any; sendMessage(message: string): void; disconnect(): Promise<any>; }'.
   Property '_onMessage' does not exist on type '{ [x: string]: any; sendMessage(message: string): void; disconnect(): Promise<any>; }'.
 node_modules/chrome-devtools-frontend/front_end/sdk/TargetManager.js(368,7): error TS2322: Type 'MainConnection' is not assignable to type '{ [x: string]: any; sendMessage(message: string): void; disconnect(): Promise<any>; }'.
+node_modules/chrome-devtools-frontend/front_end/sdk/TargetManager.js(368,7): error TS2322: Type 'MainConnection' is not assignable to type '{ [x: string]: any; sendMessage(message: string): void; disconnect(): Promise<any>; }'.
+  Property '_onMessage' does not exist on type '{ [x: string]: any; sendMessage(message: string): void; disconnect(): Promise<any>; }'.
 node_modules/chrome-devtools-frontend/front_end/sdk/TargetManager.js(401,38): error TS2339: Property 'targetAgent' does not exist on type 'Target'.
 node_modules/chrome-devtools-frontend/front_end/sdk/TargetManager.js(406,18): error TS2339: Property 'registerTargetDispatcher' does not exist on type 'Target'.
-node_modules/chrome-devtools-frontend/front_end/sdk/TargetManager.js(414,31): error TS2339: Property 'setDevicesUpdatesEnabled' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/sdk/TargetManager.js(414,31): error TS2339: Property 'setDevicesUpdatesEnabled' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/sdk/TargetManager.js(415,31): error TS2551: Property 'events' does not exist on type 'typeof InspectorFrontendHostAPI'. Did you mean 'Events'?
 node_modules/chrome-devtools-frontend/front_end/sdk/TargetManager.js(424,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/sdk/TargetManager.js(427,34): error TS2694: Namespace 'Adb' has no exported member 'Config'.
+node_modules/chrome-devtools-frontend/front_end/sdk/TargetManager.js(454,29): error TS2551: Property 'events' does not exist on type 'typeof InspectorFrontendHostAPI'. Did you mean 'Events'?
 node_modules/chrome-devtools-frontend/front_end/sdk/TargetManager.js(483,24): error TS2694: Namespace 'Protocol' has no exported member 'Target'.
 node_modules/chrome-devtools-frontend/front_end/sdk/TargetManager.js(501,24): error TS2694: Namespace 'Protocol' has no exported member 'Target'.
 node_modules/chrome-devtools-frontend/front_end/sdk/TargetManager.js(530,24): error TS2694: Namespace 'Protocol' has no exported member 'Target'.
-node_modules/chrome-devtools-frontend/front_end/sdk/TargetManager.js(555,29): error TS2339: Property 'bringToFront' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/sdk/TargetManager.js(555,29): error TS2339: Property 'bringToFront' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/sdk/TargetManager.js(581,24): error TS2694: Namespace 'Protocol' has no exported member 'TargetAgent'.
-node_modules/chrome-devtools-frontend/front_end/sdk/TargetManager.js(583,52): error TS2694: Namespace 'Connection' has no exported member 'Params'.
+node_modules/chrome-devtools-frontend/front_end/sdk/TargetManager.js(583,52): error TS2694: Namespace 'Protocol.InspectorBackend.Connection' has no exported member 'Params'.
 node_modules/chrome-devtools-frontend/front_end/sdk/TargetManager.js(589,5): error TS2322: Type 'ChildConnection' is not assignable to type '{ [x: string]: any; sendMessage(message: string): void; disconnect(): Promise<any>; }'.
   Property '_agent' does not exist on type '{ [x: string]: any; sendMessage(message: string): void; disconnect(): Promise<any>; }'.
 node_modules/chrome-devtools-frontend/front_end/sdk/TargetManager.js(589,5): error TS2322: Type 'ChildConnection' is not assignable to type '{ [x: string]: any; sendMessage(message: string): void; disconnect(): Promise<any>; }'.
 node_modules/chrome-devtools-frontend/front_end/sdk/TargetManager.js(598,24): error TS2694: Namespace 'Protocol' has no exported member 'TargetAgent'.
-node_modules/chrome-devtools-frontend/front_end/sdk/TargetManager.js(600,52): error TS2694: Namespace 'Connection' has no exported member 'Params'.
+node_modules/chrome-devtools-frontend/front_end/sdk/TargetManager.js(600,52): error TS2694: Namespace 'Protocol.InspectorBackend.Connection' has no exported member 'Params'.
 node_modules/chrome-devtools-frontend/front_end/sdk/TargetManager.js(672,1): error TS2322: Type 'TargetManager' is not assignable to type '{ [x: string]: any; targetAdded(target: Target): void; targetRemoved(target: Target): void; } & {...'.
   Type 'TargetManager' is not assignable to type '{ [x: string]: any; targetAdded(target: Target): void; targetRemoved(target: Target): void; }'.
     Property 'targetAdded' is missing in type 'TargetManager'.
-node_modules/chrome-devtools-frontend/front_end/sdk/TracingManager.js(13,42): error TS2694: Namespace 'TracingManager' has no exported member 'EventPayload'.
+node_modules/chrome-devtools-frontend/front_end/sdk/TracingManager.js(13,42): error TS2694: Namespace 'SDK.TracingManager' has no exported member 'EventPayload'.
 node_modules/chrome-devtools-frontend/front_end/sdk/TracingManager.js(36,33): error TS2339: Property 'tracingAgent' does not exist on type 'Target'.
 node_modules/chrome-devtools-frontend/front_end/sdk/TracingManager.js(37,12): error TS2339: Property 'registerTracingDispatcher' does not exist on type 'Target'.
-node_modules/chrome-devtools-frontend/front_end/sdk/TracingManager.js(56,42): error TS2694: Namespace 'TracingManager' has no exported member 'EventPayload'.
-node_modules/chrome-devtools-frontend/front_end/sdk/TracingManager.js(118,2): error TS1003: Identifier expected.
+node_modules/chrome-devtools-frontend/front_end/sdk/TracingManager.js(56,42): error TS2694: Namespace 'SDK.TracingManager' has no exported member 'EventPayload'.
 node_modules/chrome-devtools-frontend/front_end/sdk/TracingManager.js(119,20): error TS2339: Property 'EventPayload' does not exist on type 'typeof TracingManager'.
-node_modules/chrome-devtools-frontend/front_end/sdk/TracingManager.js(150,42): error TS2694: Namespace 'TracingManager' has no exported member 'EventPayload'.
-node_modules/chrome-devtools-frontend/front_end/sdk/TracingModel.js(77,34): error TS2694: Namespace 'TracingManager' has no exported member 'EventPayload'.
-node_modules/chrome-devtools-frontend/front_end/sdk/TracingModel.js(133,42): error TS2694: Namespace 'TracingManager' has no exported member 'EventPayload'.
-node_modules/chrome-devtools-frontend/front_end/sdk/TracingModel.js(179,34): error TS2694: Namespace 'TracingManager' has no exported member 'EventPayload'.
+node_modules/chrome-devtools-frontend/front_end/sdk/TracingManager.js(150,42): error TS2694: Namespace 'SDK.TracingManager' has no exported member 'EventPayload'.
+node_modules/chrome-devtools-frontend/front_end/sdk/TracingModel.js(77,34): error TS2694: Namespace 'SDK.TracingManager' has no exported member 'EventPayload'.
+node_modules/chrome-devtools-frontend/front_end/sdk/TracingModel.js(133,42): error TS2694: Namespace 'SDK.TracingManager' has no exported member 'EventPayload'.
+node_modules/chrome-devtools-frontend/front_end/sdk/TracingModel.js(179,34): error TS2694: Namespace 'SDK.TracingManager' has no exported member 'EventPayload'.
 node_modules/chrome-devtools-frontend/front_end/sdk/TracingModel.js(250,47): error TS2339: Property 'id' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/sdk/TracingModel.js(254,37): error TS2339: Property 'id' does not exist on type 'Event'.
-node_modules/chrome-devtools-frontend/front_end/sdk/TracingModel.js(283,5): error TS2322: Type 'NamedObject[]' is not assignable to type 'Process[]'.
 node_modules/chrome-devtools-frontend/front_end/sdk/TracingModel.js(283,5): error TS2322: Type 'NamedObject[]' is not assignable to type 'Process[]'.
   Type 'NamedObject' is not assignable to type 'Process'.
     Property '_threads' is missing in type 'NamedObject'.
+node_modules/chrome-devtools-frontend/front_end/sdk/TracingModel.js(283,5): error TS2322: Type 'NamedObject[]' is not assignable to type 'Process[]'.
 node_modules/chrome-devtools-frontend/front_end/sdk/TracingModel.js(283,65): error TS2339: Property 'valuesArray' does not exist on type 'Map<string | number, Process>'.
 node_modules/chrome-devtools-frontend/front_end/sdk/TracingModel.js(305,23): error TS2339: Property 'stableSort' does not exist on type 'Event[]'.
 node_modules/chrome-devtools-frontend/front_end/sdk/TracingModel.js(308,49): error TS2345: Argument of type '{ [x: string]: any; Begin: string; End: string; Complete: string; Instant: string; AsyncBegin: st...' is not assignable to parameter of type 'string'.
@@ -11667,28 +11203,28 @@ node_modules/chrome-devtools-frontend/front_end/sdk/TracingModel.js(397,9): erro
 node_modules/chrome-devtools-frontend/front_end/sdk/TracingModel.js(397,48): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; Begin: string; End: string; Complete: string; Instant: string; AsyncBegin: st...' and 'string'.
 node_modules/chrome-devtools-frontend/front_end/sdk/TracingModel.js(398,39): error TS2339: Property 'peekLast' does not exist on type 'Event[]'.
 node_modules/chrome-devtools-frontend/front_end/sdk/TracingModel.js(485,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
-node_modules/chrome-devtools-frontend/front_end/sdk/TracingModel.js(501,32): error TS2694: Namespace 'TracingModel' has no exported member 'Phase'.
-node_modules/chrome-devtools-frontend/front_end/sdk/TracingModel.js(512,34): error TS2694: Namespace 'TracingModel' has no exported member 'Phase'.
-node_modules/chrome-devtools-frontend/front_end/sdk/TracingModel.js(526,34): error TS2694: Namespace 'TracingManager' has no exported member 'EventPayload'.
-node_modules/chrome-devtools-frontend/front_end/sdk/TracingModel.js(532,65): error TS2694: Namespace 'TracingModel' has no exported member 'Phase'.
+node_modules/chrome-devtools-frontend/front_end/sdk/TracingModel.js(501,32): error TS2694: Namespace 'SDK.TracingModel' has no exported member 'Phase'.
+node_modules/chrome-devtools-frontend/front_end/sdk/TracingModel.js(512,34): error TS2694: Namespace 'SDK.TracingModel' has no exported member 'Phase'.
+node_modules/chrome-devtools-frontend/front_end/sdk/TracingModel.js(526,34): error TS2694: Namespace 'SDK.TracingManager' has no exported member 'EventPayload'.
+node_modules/chrome-devtools-frontend/front_end/sdk/TracingModel.js(532,65): error TS2694: Namespace 'SDK.TracingModel' has no exported member 'Phase'.
 node_modules/chrome-devtools-frontend/front_end/sdk/TracingModel.js(541,13): error TS2339: Property 'id' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/sdk/TracingModel.js(543,13): error TS2339: Property 'bind_id' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/sdk/TracingModel.js(576,43): error TS2339: Property 'ordinal' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/sdk/TracingModel.js(576,55): error TS2339: Property 'ordinal' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/sdk/TracingModel.js(637,27): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Begin: string; End: string; Complete: string; Instant: string; AsyncBegin: st...'.
-node_modules/chrome-devtools-frontend/front_end/sdk/TracingModel.js(647,34): error TS2694: Namespace 'TracingManager' has no exported member 'EventPayload'.
+node_modules/chrome-devtools-frontend/front_end/sdk/TracingModel.js(647,34): error TS2694: Namespace 'SDK.TracingManager' has no exported member 'EventPayload'.
 node_modules/chrome-devtools-frontend/front_end/sdk/TracingModel.js(733,9): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; Begin: string; End: string; Complete: string; Instant: string; AsyncBegin: st...' and 'string'.
 node_modules/chrome-devtools-frontend/front_end/sdk/TracingModel.js(733,60): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; Begin: string; End: string; Complete: string; Instant: string; AsyncBegin: st...' and 'string'.
-node_modules/chrome-devtools-frontend/front_end/sdk/TracingModel.js(859,34): error TS2694: Namespace 'TracingManager' has no exported member 'EventPayload'.
-node_modules/chrome-devtools-frontend/front_end/sdk/TracingModel.js(870,5): error TS2322: Type 'NamedObject[]' is not assignable to type 'Thread[]'.
+node_modules/chrome-devtools-frontend/front_end/sdk/TracingModel.js(859,34): error TS2694: Namespace 'SDK.TracingManager' has no exported member 'EventPayload'.
 node_modules/chrome-devtools-frontend/front_end/sdk/TracingModel.js(870,5): error TS2322: Type 'NamedObject[]' is not assignable to type 'Thread[]'.
   Type 'NamedObject' is not assignable to type 'Thread'.
     Property '_process' is missing in type 'NamedObject'.
+node_modules/chrome-devtools-frontend/front_end/sdk/TracingModel.js(870,5): error TS2322: Type 'NamedObject[]' is not assignable to type 'Thread[]'.
 node_modules/chrome-devtools-frontend/front_end/sdk/TracingModel.js(870,61): error TS2339: Property 'valuesArray' does not exist on type 'Map<number, Thread>'.
 node_modules/chrome-devtools-frontend/front_end/sdk/TracingModel.js(888,23): error TS2339: Property 'stableSort' does not exist on type 'any[]'.
 node_modules/chrome-devtools-frontend/front_end/sdk/TracingModel.js(889,18): error TS2339: Property 'stableSort' does not exist on type 'any[]'.
 node_modules/chrome-devtools-frontend/front_end/sdk/TracingModel.js(917,18): error TS2339: Property 'remove' does not exist on type 'any[]'.
-node_modules/chrome-devtools-frontend/front_end/sdk/TracingModel.js(921,34): error TS2694: Namespace 'TracingManager' has no exported member 'EventPayload'.
+node_modules/chrome-devtools-frontend/front_end/sdk/TracingModel.js(921,34): error TS2694: Namespace 'SDK.TracingManager' has no exported member 'EventPayload'.
 node_modules/chrome-devtools-frontend/front_end/sdk_test_runner/PageMockTestRunner.js(88,20): error TS2339: Property 'hashCode' does not exist on type 'StringConstructor'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityModel.js(14,34): error TS2339: Property 'securityAgent' does not exist on type 'Target'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityModel.js(15,12): error TS2339: Property 'registerSecurityDispatcher' does not exist on type 'Target'.
@@ -11696,11 +11232,6 @@ node_modules/chrome-devtools-frontend/front_end/security/SecurityModel.js(34,24)
 node_modules/chrome-devtools-frontend/front_end/security/SecurityModel.js(35,24): error TS2694: Namespace 'Protocol' has no exported member 'Security'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityModel.js(40,32): error TS2339: Property '_symbolicToNumericSecurityState' does not exist on type 'typeof SecurityModel'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityModel.js(41,49): error TS2339: Property '_symbolicToNumericSecurityState' does not exist on type 'typeof SecurityModel'.
-node_modules/chrome-devtools-frontend/front_end/security/SecurityModel.js(45,18): error TS2339: Property 'Security' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/security/SecurityModel.js(45,56): error TS2339: Property 'Security' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/security/SecurityModel.js(46,18): error TS2339: Property 'Security' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/security/SecurityModel.js(46,59): error TS2339: Property 'Security' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/security/SecurityModel.js(49,18): error TS2339: Property 'Security' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityModel.js(53,30): error TS2339: Property '_symbolicToNumericSecurityState' does not exist on type 'typeof SecurityModel'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityModel.js(75,24): error TS2694: Namespace 'Protocol' has no exported member 'Security'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityModel.js(77,31): error TS2694: Namespace 'Protocol' has no exported member 'Security'.
@@ -11710,14 +11241,14 @@ node_modules/chrome-devtools-frontend/front_end/security/SecurityModel.js(103,31
 node_modules/chrome-devtools-frontend/front_end/security/SecurityModel.js(104,24): error TS2694: Namespace 'Protocol' has no exported member 'Security'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(15,25): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(21,31): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
-node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(24,45): error TS2694: Namespace 'SecurityPanel' has no exported member 'Origin'.
-node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(24,77): error TS2694: Namespace 'SecurityPanel' has no exported member 'OriginState'.
-node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(27,45): error TS2694: Namespace 'NetworkLogView' has no exported member 'MixedContentFilterValues'.
+node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(24,45): error TS2694: Namespace 'Security.SecurityPanel' has no exported member 'Origin'.
+node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(24,77): error TS2694: Namespace 'Security.SecurityPanel' has no exported member 'OriginState'.
+node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(27,45): error TS2694: Namespace 'Network.NetworkLogView' has no exported member 'MixedContentFilterValues'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(37,57): error TS2339: Property 'runtime' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(47,9): error TS2339: Property 'consume' does not exist on type 'Event'.
-node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(49,29): error TS2339: Property 'showCertificateViewer' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(49,29): error TS2339: Property 'showCertificateViewer' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(60,9): error TS2339: Property 'consume' does not exist on type 'Event'.
-node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(61,29): error TS2339: Property 'showCertificateViewer' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(61,29): error TS2339: Property 'showCertificateViewer' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(85,20): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(86,20): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(87,20): error TS2339: Property 'createChild' does not exist on type 'Element'.
@@ -11730,47 +11261,37 @@ node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(121,22
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(125,46): error TS2694: Namespace 'Protocol' has no exported member 'Security'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(127,52): error TS2694: Namespace 'Protocol' has no exported member 'Security'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(128,54): error TS2694: Namespace 'Protocol' has no exported member 'Security'.
-node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(138,38): error TS2694: Namespace 'SecurityPanel' has no exported member 'Origin'.
+node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(138,38): error TS2694: Namespace 'Security.SecurityPanel' has no exported member 'Origin'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(181,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(200,46): error TS2694: Namespace 'Protocol' has no exported member 'Security'.
-node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(202,47): error TS2339: Property 'Security' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(205,47): error TS2339: Property 'Security' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(214,52): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(242,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(254,47): error TS2339: Property 'Security' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(257,40): error TS2694: Namespace 'NetworkLogView' has no exported member 'MixedContentFilterValues'.
+node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(257,40): error TS2694: Namespace 'Network.NetworkLogView' has no exported member 'MixedContentFilterValues'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(258,9): error TS2322: Type 'string' is not assignable to type '{ [x: string]: any; All: string; Displayed: string; Blocked: string; BlockOverridden: string; }'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(260,7): error TS2322: Type 'string' is not assignable to type '{ [x: string]: any; All: string; Displayed: string; Blocked: string; BlockOverridden: string; }'.
-node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(261,52): error TS2339: Property 'Security' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(262,7): error TS2322: Type 'string' is not assignable to type '{ [x: string]: any; All: string; Displayed: string; Blocked: string; BlockOverridden: string; }'.
-node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(263,52): error TS2339: Property 'Security' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(264,7): error TS2322: Type 'string' is not assignable to type '{ [x: string]: any; All: string; Displayed: string; Blocked: string; BlockOverridden: string; }'.
-node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(275,38): error TS2694: Namespace 'NetworkLogView' has no exported member 'MixedContentFilterValues'.
+node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(275,38): error TS2694: Namespace 'Network.NetworkLogView' has no exported member 'MixedContentFilterValues'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(283,24): error TS2694: Namespace 'Protocol' has no exported member 'Security'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(284,24): error TS2694: Namespace 'Protocol' has no exported member 'Security'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(285,25): error TS2694: Namespace 'Protocol' has no exported member 'Security'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(332,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(370,23): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(371,24): error TS2339: Property 'Origin' does not exist on type 'typeof SecurityPanel'.
-node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(375,2): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(380,24): error TS2339: Property 'OriginState' does not exist on type 'typeof SecurityPanel'.
-node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(389,47): error TS2694: Namespace 'SecurityPanel' has no exported member 'Origin'.
-node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(400,56): error TS2694: Namespace 'SecurityPanelSidebarTree' has no exported member 'OriginGroupName'.
+node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(389,47): error TS2694: Namespace 'Security.SecurityPanel' has no exported member 'Origin'.
+node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(400,56): error TS2694: Namespace 'Security.SecurityPanelSidebarTree' has no exported member 'OriginGroupName'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(416,52): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(422,45): error TS2694: Namespace 'SecurityPanel' has no exported member 'Origin'.
-node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(439,38): error TS2694: Namespace 'SecurityPanel' has no exported member 'Origin'.
+node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(422,45): error TS2694: Namespace 'Security.SecurityPanel' has no exported member 'Origin'.
+node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(439,38): error TS2694: Namespace 'Security.SecurityPanel' has no exported member 'Origin'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(440,24): error TS2694: Namespace 'Protocol' has no exported member 'Security'.
-node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(451,38): error TS2694: Namespace 'SecurityPanel' has no exported member 'Origin'.
-node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(458,38): error TS2694: Namespace 'SecurityPanel' has no exported member 'Origin'.
+node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(451,38): error TS2694: Namespace 'Security.SecurityPanel' has no exported member 'Origin'.
+node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(458,38): error TS2694: Namespace 'Security.SecurityPanel' has no exported member 'Origin'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(459,24): error TS2694: Namespace 'Protocol' has no exported member 'Security'.
-node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(471,23): error TS2339: Property 'Security' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(474,23): error TS2339: Property 'Security' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(515,15): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(516,14): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(517,11): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(518,12): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(536,46): error TS2339: Property 'createChild' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(539,36): error TS2339: Property 'Security' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(552,24): error TS2694: Namespace 'Protocol' has no exported member 'Security'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(563,25): error TS2694: Namespace 'Protocol' has no exported member 'Security'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(597,48): error TS2339: Property 'createChild' does not exist on type 'Element'.
@@ -11790,31 +11311,26 @@ node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(669,18
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(670,19): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(671,18): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(672,17): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(691,50): error TS2339: Property 'Security' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(695,25): error TS2339: Property 'Security' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(698,17): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; All: string; Displayed: string; Blocked: string; BlockOverridden: string; }'.
-node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(700,25): error TS2339: Property 'Security' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(702,62): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; All: string; Displayed: string; Blocked: string; BlockOverridden: string; }'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(711,40): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; All: string; Displayed: string; Blocked: string; BlockOverridden: string; }'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(712,46): error TS2694: Namespace 'Protocol' has no exported member 'Security'.
-node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(713,33): error TS2339: Property 'Security' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(714,18): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(715,22): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(716,36): error TS2339: Property 'Security' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(720,56): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; All: string; Displayed: string; Blocked: string; BlockOverridden: string; }'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(726,24): error TS2694: Namespace 'Protocol' has no exported member 'Security'.
-node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(727,38): error TS2694: Namespace 'NetworkLogView' has no exported member 'MixedContentFilterValues'.
+node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(727,38): error TS2694: Namespace 'Network.NetworkLogView' has no exported member 'MixedContentFilterValues'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(739,35): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(740,35): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(744,34): error TS2339: Property 'createChild' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(755,38): error TS2694: Namespace 'NetworkLogView' has no exported member 'MixedContentFilterValues'.
+node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(755,38): error TS2694: Namespace 'Network.NetworkLogView' has no exported member 'MixedContentFilterValues'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(759,7): error TS2339: Property 'consume' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(761,9): error TS2345: Argument of type '{ filterType: string; filterValue: { [x: string]: any; All: string; Displayed: string; Blocked: s...' is not assignable to parameter of type '{ filterType: { [x: string]: any; Domain: string; HasResponseHeader: string; Is: string; LargerTh...'.
   Type '{ filterType: string; filterValue: { [x: string]: any; All: string; Displayed: string; Blocked: s...' is not assignable to type '{ filterType: { [x: string]: any; Domain: string; HasResponseHeader: string; Is: string; LargerTh...'.
     Types of property 'filterType' are incompatible.
       Type 'string' is not assignable to type '{ [x: string]: any; Domain: string; HasResponseHeader: string; Is: string; LargerThan: string; Me...'.
-node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(771,38): error TS2694: Namespace 'SecurityPanel' has no exported member 'Origin'.
-node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(772,38): error TS2694: Namespace 'SecurityPanel' has no exported member 'OriginState'.
+node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(771,38): error TS2694: Namespace 'Security.SecurityPanel' has no exported member 'Origin'.
+node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(772,38): error TS2694: Namespace 'Security.SecurityPanel' has no exported member 'OriginState'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(783,37): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(784,75): error TS2554: Expected 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(794,9): error TS2339: Property 'consume' does not exist on type 'Event'.
@@ -11852,7 +11368,6 @@ node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(883,47
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(885,47): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(891,38): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(893,11): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(894,55): error TS2339: Property 'Security' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(895,43): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(896,86): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(898,11): error TS2555: Expected at least 2 arguments, but got 1.
@@ -11866,11 +11381,10 @@ node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(933,46
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(947,24): error TS2694: Namespace 'Protocol' has no exported member 'Security'.
 node_modules/chrome-devtools-frontend/front_end/security/SecurityPanel.js(980,29): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/security_test_runner/SecurityTestRunner.js(21,29): error TS2488: Type 'NodeListOf<HTMLSpanElement>' must have a '[Symbol.iterator]()' method that returns an iterator.
-node_modules/chrome-devtools-frontend/front_end/security_test_runner/SecurityTestRunner.js(29,14): error TS2339: Property 'networkManager' does not exist on type 'typeof TestRunner'.
 node_modules/chrome-devtools-frontend/front_end/services/ServiceManager.js(20,50): error TS2345: Argument of type 'RemoteServicePort' is not assignable to parameter of type 'typeof ServicePort'.
-  Type 'RemoteServicePort' provides no match for the signature '(): void'.
+  Property 'prototype' is missing in type 'RemoteServicePort'.
 node_modules/chrome-devtools-frontend/front_end/services/ServiceManager.js(48,61): error TS2345: Argument of type 'WorkerServicePort' is not assignable to parameter of type 'typeof ServicePort'.
-  Type 'WorkerServicePort' provides no match for the signature '(): void'.
+  Property 'prototype' is missing in type 'WorkerServicePort'.
 node_modules/chrome-devtools-frontend/front_end/services/ServiceManager.js(62,16): error TS2339: Property 'setHandlers' does not exist on type 'typeof ServicePort'.
 node_modules/chrome-devtools-frontend/front_end/services/ServiceManager.js(65,29): error TS1005: '>' expected.
 node_modules/chrome-devtools-frontend/front_end/services/ServiceManager.js(94,18): error TS2339: Property 'close' does not exist on type 'typeof ServicePort'.
@@ -11887,6 +11401,9 @@ node_modules/chrome-devtools-frontend/front_end/settings/FrameworkBlackboxSettin
 node_modules/chrome-devtools-frontend/front_end/settings/FrameworkBlackboxSettingsTab.js(18,13): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/settings/FrameworkBlackboxSettingsTab.js(20,27): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/settings/FrameworkBlackboxSettingsTab.js(21,27): error TS2555: Expected at least 2 arguments, but got 1.
+node_modules/chrome-devtools-frontend/front_end/settings/FrameworkBlackboxSettingsTab.js(23,36): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; renderItem(item: T, editable: boolean): Element; removeItemRequested(item: T,...'.
+  Type 'FrameworkBlackboxSettingsTab' is not assignable to type '{ [x: string]: any; renderItem(item: T, editable: boolean): Element; removeItemRequested(item: T,...'.
+    Property '_blackboxLabel' does not exist on type '{ [x: string]: any; renderItem(item: T, editable: boolean): Element; removeItemRequested(item: T,...'.
 node_modules/chrome-devtools-frontend/front_end/settings/FrameworkBlackboxSettingsTab.js(28,31): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/settings/FrameworkBlackboxSettingsTab.js(32,29): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/settings/FrameworkBlackboxSettingsTab.js(39,25): error TS2339: Property 'tabIndex' does not exist on type 'Element'.
@@ -11903,6 +11420,7 @@ node_modules/chrome-devtools-frontend/front_end/settings/FrameworkBlackboxSettin
 node_modules/chrome-devtools-frontend/front_end/settings/FrameworkBlackboxSettingsTab.js(131,65): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/settings/FrameworkBlackboxSettingsTab.js(133,66): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/settings/FrameworkBlackboxSettingsTab.js(135,26): error TS2339: Property 'createChild' does not exist on type 'Element'.
+node_modules/chrome-devtools-frontend/front_end/settings/FrameworkBlackboxSettingsTab.js(153,36): error TS2339: Property 'getAsArray' does not exist on type 'Setting<any>'.
 node_modules/chrome-devtools-frontend/front_end/settings/SettingsScreen.js(39,25): error TS2339: Property 'tabIndex' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/settings/SettingsScreen.js(45,10): error TS2339: Property 'createChild' does not exist on type 'DocumentFragment'.
 node_modules/chrome-devtools-frontend/front_end/settings/SettingsScreen.js(46,24): error TS2555: Expected at least 2 arguments, but got 1.
@@ -11910,9 +11428,9 @@ node_modules/chrome-devtools-frontend/front_end/settings/SettingsScreen.js(51,48
   Type 'ToolbarItem' is not assignable to type '{ [x: string]: any; item(): any & any; }'.
 node_modules/chrome-devtools-frontend/front_end/settings/SettingsScreen.js(54,43): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/settings/SettingsScreen.js(69,55): error TS2339: Property 'runtime' does not exist on type 'Window'.
-node_modules/chrome-devtools-frontend/front_end/settings/SettingsScreen.js(85,5): error TS2322: Type '{ [x: string]: any; tabbedPane(): TabbedPane; enableMoreTabsButton(): void; }' is not assignable to type '{ [x: string]: any; appendApplicableItems(locationName: string): void; appendView(view: { [x: str...'.
 node_modules/chrome-devtools-frontend/front_end/settings/SettingsScreen.js(85,5): error TS2322: Type '{ [x: string]: any; tabbedPane(): TabbedPane; enableMoreTabsButton(): void; }' is not assignable to type '{ [x: string]: any; appendApplicableItems(locationName: string): void; appendView(view: { [x: str...'.
   Property 'appendApplicableItems' is missing in type '{ [x: string]: any; tabbedPane(): TabbedPane; enableMoreTabsButton(): void; }'.
+node_modules/chrome-devtools-frontend/front_end/settings/SettingsScreen.js(85,5): error TS2322: Type '{ [x: string]: any; tabbedPane(): TabbedPane; enableMoreTabsButton(): void; }' is not assignable to type '{ [x: string]: any; appendApplicableItems(locationName: string): void; appendView(view: { [x: str...'.
 node_modules/chrome-devtools-frontend/front_end/settings/SettingsScreen.js(100,15): error TS2339: Property 'keyCode' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/settings/SettingsScreen.js(119,31): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/settings/SettingsScreen.js(121,42): error TS2339: Property 'createChild' does not exist on type 'Element'.
@@ -11928,19 +11446,23 @@ node_modules/chrome-devtools-frontend/front_end/settings/SettingsScreen.js(247,1
 node_modules/chrome-devtools-frontend/front_end/settings/SettingsScreen.js(248,30): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/settings/SettingsScreen.js(249,27): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/settings/SettingsScreen.js(254,41): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/settings/SettingsScreen.js(286,31): error TS2339: Property 'openInNewTab' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/settings/SettingsScreen.js(286,31): error TS2339: Property 'openInNewTab' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/settings/SettingsScreen.js(289,53): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/settings/SettingsScreen.js(311,10): error TS2339: Property 'runtime' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/settings/SettingsScreen.js(312,10): error TS2339: Property 'runtime' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/settings/SettingsScreen.js(313,10): error TS2339: Property 'runtime' does not exist on type 'Window'.
-node_modules/chrome-devtools-frontend/front_end/settings/SettingsScreen.js(324,31): error TS2339: Property 'bringToFront' does not exist on type 'typeof InspectorFrontendHost'.
-node_modules/chrome-devtools-frontend/front_end/settings/SettingsScreen.js(336,31): error TS2339: Property 'bringToFront' does not exist on type 'typeof InspectorFrontendHost'.
-node_modules/chrome-devtools-frontend/front_end/settings/SettingsScreen.js(351,31): error TS2339: Property 'bringToFront' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/settings/SettingsScreen.js(324,31): error TS2339: Property 'bringToFront' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/settings/SettingsScreen.js(336,31): error TS2339: Property 'bringToFront' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/settings/SettingsScreen.js(351,31): error TS2339: Property 'bringToFront' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/snippets/ScriptSnippetModel.js(54,56): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; rawLocationToUILocation(rawLocation: Location): UILocation; uiLocationToRawLo...'.
+  Type 'ScriptSnippetModel' is not assignable to type '{ [x: string]: any; rawLocationToUILocation(rawLocation: Location): UILocation; uiLocationToRawLo...'.
+    Property '_workspace' does not exist on type '{ [x: string]: any; rawLocationToUILocation(rawLocation: Location): UILocation; uiLocationToRawLo...'.
 node_modules/chrome-devtools-frontend/front_end/snippets/ScriptSnippetModel.js(70,35): error TS2339: Property 'remove' does not exist on type 'Map<DebuggerModel, SnippetScriptMapping>'.
 node_modules/chrome-devtools-frontend/front_end/snippets/ScriptSnippetModel.js(113,5): error TS2322: Type 'SnippetsProject' is not assignable to type '{ [x: string]: any; workspace(): Workspace; id(): string; type(): string; isServiceProject(): boo...'.
   Property '_model' does not exist on type '{ [x: string]: any; workspace(): Workspace; id(): string; type(): string; isServiceProject(): boo...'.
 node_modules/chrome-devtools-frontend/front_end/snippets/ScriptSnippetModel.js(113,5): error TS2322: Type 'SnippetsProject' is not assignable to type '{ [x: string]: any; workspace(): Workspace; id(): string; type(): string; isServiceProject(): boo...'.
-node_modules/chrome-devtools-frontend/front_end/snippets/ScriptSnippetModel.js(137,18): error TS2339: Property 'addEventListener' does not exist on type 'UISourceCode'.
+node_modules/chrome-devtools-frontend/front_end/snippets/ScriptSnippetModel.js(136,63): error TS2345: Argument of type 'SnippetContentProvider' is not assignable to parameter of type '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
+  Property '_snippet' does not exist on type '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
 node_modules/chrome-devtools-frontend/front_end/snippets/ScriptSnippetModel.js(146,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/snippets/ScriptSnippetModel.js(165,36): error TS2339: Property 'remove' does not exist on type 'Map<UISourceCode, string>'.
 node_modules/chrome-devtools-frontend/front_end/snippets/ScriptSnippetModel.js(207,35): error TS2339: Property 'valuesArray' does not exist on type 'Map<DebuggerModel, SnippetScriptMapping>'.
@@ -11955,11 +11477,11 @@ node_modules/chrome-devtools-frontend/front_end/snippets/ScriptSnippetModel.js(5
 node_modules/chrome-devtools-frontend/front_end/snippets/SnippetStorage.js(62,27): error TS2339: Property 'valuesArray' does not exist on type 'Map<string, Snippet>'.
 node_modules/chrome-devtools-frontend/front_end/snippets/SnippetsQuickOpen.js(30,12): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/source_frame/FontView.js(38,11): error TS2555: Expected at least 2 arguments, but got 1.
+node_modules/chrome-devtools-frontend/front_end/source_frame/FontView.js(52,5): error TS2322: Type 'ToolbarText[]' is not assignable to type '({ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; })[]'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/FontView.js(52,5): error TS2322: Type 'ToolbarText[]' is not assignable to type '({ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; })[]'.
   Type 'ToolbarText' is not assignable to type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
     Type 'ToolbarText' is not assignable to type '{ [x: string]: any; item(): any & any; }'.
       Property 'item' is missing in type 'ToolbarText'.
-node_modules/chrome-devtools-frontend/front_end/source_frame/FontView.js(52,5): error TS2322: Type 'ToolbarText[]' is not assignable to type '({ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; })[]'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/FontView.js(62,16): error TS2339: Property 'sprintf' does not exist on type 'StringConstructor'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/FontView.js(78,21): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/FontView.js(79,19): error TS2339: Property 'createTextChild' does not exist on type 'Element'.
@@ -11980,7 +11502,6 @@ node_modules/chrome-devtools-frontend/front_end/source_frame/FontView.js(141,42)
 node_modules/chrome-devtools-frontend/front_end/source_frame/FontView.js(144,31): error TS2339: Property 'style' does not exist on type 'Node'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/FontView.js(152,29): error TS2339: Property 'style' does not exist on type 'Node'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/ImageView.js(38,11): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/source_frame/ImageView.js(49,26): error TS2339: Property 'addEventListener' does not exist on type 'UISourceCode'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/ImageView.js(52,81): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/source_frame/ImageView.js(58,36): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/ImageView.js(68,5): error TS2322: Type '(ToolbarSeparator | ToolbarText)[]' is not assignable to type '({ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; })[]'.
@@ -11989,36 +11510,39 @@ node_modules/chrome-devtools-frontend/front_end/source_frame/ImageView.js(68,5):
     Type 'ToolbarSeparator' is not assignable to type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
       Type 'ToolbarSeparator' is not assignable to type '{ [x: string]: any; item(): any & any; }'.
         Property 'item' is missing in type 'ToolbarSeparator'.
-node_modules/chrome-devtools-frontend/front_end/source_frame/ImageView.js(85,26): error TS2339: Property 'removeEventListener' does not exist on type 'UISourceCode'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/ImageView.js(105,36): error TS2339: Property 'bytesToString' does not exist on type 'NumberConstructor'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/ImageView.js(128,49): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/source_frame/ImageView.js(131,11): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/source_frame/ImageView.js(134,47): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/source_frame/ImageView.js(135,47): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/source_frame/ImageView.js(140,27): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHost'.
-node_modules/chrome-devtools-frontend/front_end/source_frame/ImageView.js(144,27): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/source_frame/ImageView.js(140,27): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/source_frame/ImageView.js(144,27): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/ImageView.js(149,10): error TS2339: Property 'download' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/ImageView.js(150,10): error TS2339: Property 'href' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/ImageView.js(151,10): error TS2339: Property 'click' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/source_frame/ImageView.js(155,27): error TS2339: Property 'openInNewTab' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/source_frame/ImageView.js(155,27): error TS2339: Property 'openInNewTab' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/source_frame/JSONView.js(62,48): error TS2345: Argument of type 'JSONView' is not assignable to parameter of type '{ [x: string]: any; searchCanceled(): void; performSearch(searchConfig: SearchConfig, shouldJump:...'.
+  Property '_parsedJSON' does not exist on type '{ [x: string]: any; searchCanceled(): void; performSearch(searchConfig: SearchConfig, shouldJump:...'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/JSONView.js(63,35): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/source_frame/JSONView.js(66,47): error TS2345: Argument of type '0' is not assignable to parameter of type 'string'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/JSONView.js(165,28): error TS2339: Property 'setSearchRegex' does not exist on type 'TreeElement'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/JSONView.js(170,23): error TS2339: Property 'setSearchRegex' does not exist on type 'TreeElement'.
-node_modules/chrome-devtools-frontend/front_end/source_frame/JSONView.js(170,60): error TS2339: Property 'highlightedCurrentSearchResultClassName' does not exist on type 'typeof UI'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/PreviewFactory.js(14,33): error TS2555: Expected at least 2 arguments, but got 1.
+node_modules/chrome-devtools-frontend/front_end/source_frame/ResourceSourceFrame.js(50,48): error TS2345: Argument of type 'ResourceSourceFrame' is not assignable to parameter of type '{ [x: string]: any; searchCanceled(): void; performSearch(searchConfig: SearchConfig, shouldJump:...'.
+  Property '_resource' does not exist on type '{ [x: string]: any; searchCanceled(): void; performSearch(searchConfig: SearchConfig, shouldJump:...'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/ResourceSourceFrame.js(51,35): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/source_frame/ResourceSourceFrame.js(69,5): error TS2554: Expected 3 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourceCodeDiff.js(15,22): error TS2339: Property 'installGutter' does not exist on type 'CodeMirrorTextEditor'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourceCodeDiff.js(50,11): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; Insert: symbol; Delete: symbol; Modify: symbol; }' and 'symbol'.
+node_modules/chrome-devtools-frontend/front_end/source_frame/SourceCodeDiff.js(89,28): error TS2339: Property 'toggleLineClass' does not exist on type 'CodeMirrorTextEditor'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourceCodeDiff.js(110,20): error TS2694: Namespace 'Diff' has no exported member 'Diff'.
-node_modules/chrome-devtools-frontend/front_end/source_frame/SourceCodeDiff.js(111,58): error TS2694: Namespace 'SourceCodeDiff' has no exported member 'GutterDecorationType'.
+node_modules/chrome-devtools-frontend/front_end/source_frame/SourceCodeDiff.js(111,58): error TS2694: Namespace 'SourceFrame.SourceCodeDiff' has no exported member 'GutterDecorationType'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourceCodeDiff.js(177,20): error TS2694: Namespace 'Diff' has no exported member 'Diff'.
-node_modules/chrome-devtools-frontend/front_end/source_frame/SourceCodeDiff.js(198,85): error TS2694: Namespace 'SourceCodeDiff' has no exported member 'GutterDecorationType'.
+node_modules/chrome-devtools-frontend/front_end/source_frame/SourceCodeDiff.js(198,85): error TS2694: Namespace 'SourceFrame.SourceCodeDiff' has no exported member 'GutterDecorationType'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourceCodeDiff.js(202,16): error TS2403: Subsequent variable declarations must have the same type.  Variable 'lineNumber' must be of type 'any', but here has type 'number'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourceCodeDiff.js(206,41): error TS2339: Property 'diff' does not exist on type 'Map<number, GutterDecoration>'.
-node_modules/chrome-devtools-frontend/front_end/source_frame/SourceCodeDiff.js(216,83): error TS2694: Namespace 'SourceCodeDiff' has no exported member 'GutterDecorationType'.
-node_modules/chrome-devtools-frontend/front_end/source_frame/SourceCodeDiff.js(244,42): error TS2694: Namespace 'SourceCodeDiff' has no exported member 'GutterDecorationType'.
+node_modules/chrome-devtools-frontend/front_end/source_frame/SourceCodeDiff.js(216,83): error TS2694: Namespace 'SourceFrame.SourceCodeDiff' has no exported member 'GutterDecorationType'.
+node_modules/chrome-devtools-frontend/front_end/source_frame/SourceCodeDiff.js(244,42): error TS2694: Namespace 'SourceFrame.SourceCodeDiff' has no exported member 'GutterDecorationType'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourceCodeDiff.js(250,9): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; Insert: symbol; Delete: symbol; Modify: symbol; }' and 'symbol'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourceCodeDiff.js(252,14): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; Insert: symbol; Delete: symbol; Modify: symbol; }' and 'symbol'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourceCodeDiff.js(254,14): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; Insert: symbol; Delete: symbol; Modify: symbol; }' and 'symbol'.
@@ -12027,6 +11551,9 @@ node_modules/chrome-devtools-frontend/front_end/source_frame/SourceCodeDiff.js(2
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourceCodeDiff.js(283,22): error TS2339: Property 'setGutterDecoration' does not exist on type 'CodeMirrorTextEditor'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourceCodeDiff.js(284,22): error TS2339: Property 'toggleLineClass' does not exist on type 'CodeMirrorTextEditor'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourceFrame.js(41,11): error TS2555: Expected at least 2 arguments, but got 1.
+node_modules/chrome-devtools-frontend/front_end/source_frame/SourceFrame.js(45,58): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; populateLineGutterContextMenu(contextMenu: { [x: string]: any; appendApplicab...'.
+  Type 'SourceFrame' is not assignable to type '{ [x: string]: any; populateLineGutterContextMenu(contextMenu: { [x: string]: any; appendApplicab...'.
+    Property '_lazyContent' does not exist on type '{ [x: string]: any; populateLineGutterContextMenu(contextMenu: { [x: string]: any; appendApplicab...'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourceFrame.js(115,5): error TS2322: Type 'ToolbarText[]' is not assignable to type '({ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; })[]'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourceFrame.js(115,5): error TS2322: Type 'ToolbarText[]' is not assignable to type '({ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; })[]'.
   Type 'ToolbarText' is not assignable to type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
@@ -12048,12 +11575,14 @@ node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.j
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(36,23): error TS2339: Property 'setOption' does not exist on type 'CodeMirror'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(38,23): error TS2339: Property 'setOption' does not exist on type 'CodeMirror'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(39,23): error TS2339: Property 'setOption' does not exist on type 'CodeMirror'.
+node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(45,12): error TS2339: Property '_isHandlingMouseDownEvent' does not exist on type 'SourcesTextEditor'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(54,20): error TS2694: Namespace 'UI' has no exported member 'AutocompleteConfig'.
-node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(55,55): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
-node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(73,43): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
-node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(80,43): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(55,65): error TS2339: Property 'isWordChar' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(73,53): error TS2339: Property 'isSpaceChar' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(80,53): error TS2339: Property 'isSpaceChar' does not exist on type 'typeof TextUtils'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(90,14): error TS2403: Subsequent variable declarations must have the same type.  Variable 'i' must be of type 'number', but here has type 'string'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(93,29): error TS2345: Argument of type 'number' is not assignable to parameter of type 'string'.
+node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(134,12): error TS2339: Property '_tokenHighlighter' does not exist on type 'CodeMirrorTextEditor'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(140,23): error TS2339: Property 'operation' does not exist on type 'CodeMirror'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(144,23): error TS2339: Property 'operation' does not exist on type 'CodeMirror'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(168,30): error TS2339: Property 'markText' does not exist on type 'CodeMirror'.
@@ -12075,13 +11604,13 @@ node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.j
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(284,25): error TS2339: Property 'removeLineClass' does not exist on type 'CodeMirror'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(285,25): error TS2339: Property 'removeLineClass' does not exist on type 'CodeMirror'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(295,38): error TS2339: Property 'lineInfo' does not exist on type 'CodeMirror'.
-node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(359,30): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(359,40): error TS2339: Property 'Indent' does not exist on type 'typeof TextUtils'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(360,25): error TS2339: Property 'setOption' does not exist on type 'CodeMirror'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(361,25): error TS2339: Property 'setOption' does not exist on type 'CodeMirror'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(363,25): error TS2339: Property 'setOption' does not exist on type 'CodeMirror'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(364,25): error TS2339: Property 'setOption' does not exist on type 'CodeMirror'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(373,23): error TS2339: Property 'setOption' does not exist on type 'CodeMirror'.
-node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(392,62): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(392,72): error TS2339: Property 'lineIndent' does not exist on type 'typeof TextUtils'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(393,27): error TS2339: Property 'replaceRange' does not exist on type 'CodeMirror'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(409,25): error TS2339: Property 'operation' does not exist on type 'CodeMirror'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(411,35): error TS2339: Property 'getCursor' does not exist on type 'CodeMirror'.
@@ -12092,15 +11621,14 @@ node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.j
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(561,13): error TS2339: Property '_codeMirrorWhitespaceStyleInjected' does not exist on type 'Document'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(563,9): error TS2339: Property '_codeMirrorWhitespaceStyleInjected' does not exist on type 'Document'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(580,18): error TS2694: Namespace 'UI' has no exported member 'AutocompleteConfig'.
-node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(593,52): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(594,31): error TS2339: Property 'GutterClickEventData' does not exist on type 'typeof SourcesTextEditor'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(614,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(622,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(631,14): error TS2339: Property 'operation' does not exist on type 'CodeMirror'.
-node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(639,30): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
-node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(670,30): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
-node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(714,30): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
-node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(729,30): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(639,40): error TS2339: Property 'lineIndent' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(670,40): error TS2339: Property 'lineIndent' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(714,40): error TS2339: Property 'lineIndent' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(729,40): error TS2339: Property 'lineIndent' does not exist on type 'typeof TextUtils'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(764,24): error TS2339: Property 'removeLineClass' does not exist on type 'CodeMirror'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(769,24): error TS2339: Property 'addLineClass' does not exist on type 'CodeMirror'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(780,51): error TS2339: Property 'markText' does not exist on type 'CodeMirror'.
@@ -12110,23 +11638,23 @@ node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.j
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(803,39): error TS2339: Property 'getSelections' does not exist on type 'CodeMirror'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(809,26): error TS2339: Property 'addLineClass' does not exist on type 'CodeMirror'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(821,33): error TS2339: Property 'getLine' does not exist on type 'CodeMirror'.
-node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(822,53): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
-node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(823,62): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
-node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(824,49): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(822,63): error TS2339: Property 'isWordChar' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(823,72): error TS2339: Property 'isWordChar' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(824,59): error TS2339: Property 'isWord' does not exist on type 'typeof TextUtils'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(829,24): error TS2339: Property 'removeOverlay' does not exist on type 'CodeMirror'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(839,9): error TS2365: Operator '===' cannot be applied to types 'void' and 'number'.
-node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(873,60): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(873,70): error TS2339: Property 'isWordChar' does not exist on type 'typeof TextUtils'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(874,14): error TS2365: Operator '===' cannot be applied to types 'void' and 'number'.
-node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(878,36): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(878,46): error TS2339: Property 'isWordChar' does not exist on type 'typeof TextUtils'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(878,71): error TS2365: Operator '!==' cannot be applied to types 'void' and 'string'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/SourcesTextEditor.js(887,22): error TS2339: Property 'addOverlay' does not exist on type 'CodeMirror'.
+node_modules/chrome-devtools-frontend/front_end/source_frame/XMLView.js(38,48): error TS2345: Argument of type 'XMLView' is not assignable to parameter of type '{ [x: string]: any; searchCanceled(): void; performSearch(searchConfig: SearchConfig, shouldJump:...'.
+  Property '_treeOutline' does not exist on type '{ [x: string]: any; searchCanceled(): void; performSearch(searchConfig: SearchConfig, shouldJump:...'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/XMLView.js(39,35): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/source_frame/XMLView.js(42,53): error TS2345: Argument of type '0' is not assignable to parameter of type 'string'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/XMLView.js(73,28): error TS2339: Property 'setSearchRegex' does not exist on type 'TreeElement'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/XMLView.js(80,23): error TS2339: Property 'setSearchRegex' does not exist on type 'TreeElement'.
-node_modules/chrome-devtools-frontend/front_end/source_frame/XMLView.js(80,48): error TS2339: Property 'highlightedCurrentSearchResultClassName' does not exist on type 'typeof UI'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/XMLView.js(223,35): error TS2339: Property 'childElementCount' does not exist on type 'Node'.
-node_modules/chrome-devtools-frontend/front_end/source_frame/XMLView.js(266,25): error TS2339: Property 'highlightedSearchResultClassName' does not exist on type 'typeof UI'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/XMLView.js(290,24): error TS2339: Property 'tagName' does not exist on type 'Node'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/XMLView.js(296,31): error TS2339: Property 'attributes' does not exist on type 'Node'.
 node_modules/chrome-devtools-frontend/front_end/source_frame/XMLView.js(305,20): error TS2339: Property 'childElementCount' does not exist on type 'Node'.
@@ -12146,8 +11674,21 @@ node_modules/chrome-devtools-frontend/front_end/sources/AdvancedSearchView.js(30
 node_modules/chrome-devtools-frontend/front_end/sources/AdvancedSearchView.js(41,53): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/sources/AdvancedSearchView.js(47,48): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/sources/AdvancedSearchView.js(53,54): error TS2339: Property 'createChild' does not exist on type 'Element'.
+node_modules/chrome-devtools-frontend/front_end/sources/AdvancedSearchView.js(62,5): error TS2322: Type 'SourcesSearchScope' is not assignable to type '{ [x: string]: any; performSearch(searchConfig: SearchConfig, progress: { [x: string]: any; setTo...'.
+  Types of property 'performSearch' are incompatible.
+    Type '(searchConfig: { [x: string]: any; query(): string; ignoreCase(): boolean; isRegex(): boolean; qu...' is not assignable to type '(searchConfig: SearchConfig, progress: { [x: string]: any; setTotalWork(totalWork: number): void;...'.
+      Types of parameters 'searchConfig' and 'searchConfig' are incompatible.
+        Type 'SearchConfig' is not assignable to type '{ [x: string]: any; query(): string; ignoreCase(): boolean; isRegex(): boolean; queries(): string...'.
+          Property '_query' does not exist on type '{ [x: string]: any; query(): string; ignoreCase(): boolean; isRegex(): boolean; queries(): string...'.
+node_modules/chrome-devtools-frontend/front_end/sources/AdvancedSearchView.js(62,5): error TS2322: Type 'SourcesSearchScope' is not assignable to type '{ [x: string]: any; performSearch(searchConfig: SearchConfig, progress: { [x: string]: any; setTo...'.
 node_modules/chrome-devtools-frontend/front_end/sources/AdvancedSearchView.js(72,58): error TS2339: Property 'runtime' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/sources/AdvancedSearchView.js(130,46): error TS2555: Expected at least 2 arguments, but got 1.
+node_modules/chrome-devtools-frontend/front_end/sources/AdvancedSearchView.js(133,34): error TS2345: Argument of type 'ProgressIndicator' is not assignable to parameter of type '{ [x: string]: any; setTotalWork(totalWork: number): void; setTitle(title: string): void; setWork...'.
+  Property 'element' does not exist on type '{ [x: string]: any; setTotalWork(totalWork: number): void; setTitle(title: string): void; setWork...'.
+node_modules/chrome-devtools-frontend/front_end/sources/AdvancedSearchView.js(157,72): error TS2345: Argument of type 'SearchConfig' is not assignable to parameter of type '{ [x: string]: any; query(): string; ignoreCase(): boolean; isRegex(): boolean; queries(): string...'.
+  Property '_query' does not exist on type '{ [x: string]: any; query(): string; ignoreCase(): boolean; isRegex(): boolean; queries(): string...'.
+node_modules/chrome-devtools-frontend/front_end/sources/AdvancedSearchView.js(197,23): error TS2345: Argument of type 'ProgressIndicator' is not assignable to parameter of type '{ [x: string]: any; setTotalWork(totalWork: number): void; setTitle(title: string): void; setWork...'.
+  Property 'element' does not exist on type '{ [x: string]: any; setTotalWork(totalWork: number): void; setTitle(title: string): void; setWork...'.
 node_modules/chrome-devtools-frontend/front_end/sources/AdvancedSearchView.js(225,46): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/sources/AdvancedSearchView.js(230,48): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/sources/AdvancedSearchView.js(238,62): error TS2555: Expected at least 2 arguments, but got 1.
@@ -12160,7 +11701,7 @@ node_modules/chrome-devtools-frontend/front_end/sources/AdvancedSearchView.js(31
 node_modules/chrome-devtools-frontend/front_end/sources/AdvancedSearchView.js(397,46): error TS2339: Property 'window' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/sources/CSSPlugin.js(84,13): error TS2339: Property 'consume' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/sources/CSSPlugin.js(102,19): error TS2339: Property 'sprintf' does not exist on type 'StringConstructor'.
-node_modules/chrome-devtools-frontend/front_end/sources/CSSPlugin.js(150,31): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/sources/CSSPlugin.js(150,41): error TS2339: Property 'splitStringByRegexes' does not exist on type 'typeof TextUtils'.
 node_modules/chrome-devtools-frontend/front_end/sources/CSSPlugin.js(197,26): error TS2339: Property 'title' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/sources/CSSPlugin.js(197,34): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/sources/CSSPlugin.js(212,26): error TS2339: Property 'title' does not exist on type 'Element'.
@@ -12173,26 +11714,28 @@ node_modules/chrome-devtools-frontend/front_end/sources/CSSPlugin.js(266,25): er
 node_modules/chrome-devtools-frontend/front_end/sources/CSSPlugin.js(288,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/sources/CSSPlugin.js(292,25): error TS2339: Property 'setBezierText' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/sources/CSSPlugin.js(315,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/sources/CSSPlugin.js(327,22): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
-node_modules/chrome-devtools-frontend/front_end/sources/CSSPlugin.js(333,40): error TS2694: Namespace 'SuggestBox' has no exported member 'Suggestions'.
+node_modules/chrome-devtools-frontend/front_end/sources/CSSPlugin.js(327,32): error TS2339: Property 'isWordChar' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/sources/CSSPlugin.js(333,40): error TS2694: Namespace 'UI.SuggestBox' has no exported member 'Suggestions'.
 node_modules/chrome-devtools-frontend/front_end/sources/CallStackSidebarPane.js(33,11): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/sources/CallStackSidebarPane.js(39,57): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/sources/CallStackSidebarPane.js(40,49): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/sources/CallStackSidebarPane.js(42,60): error TS2694: Namespace 'CallStackSidebarPane' has no exported member 'Item'.
-node_modules/chrome-devtools-frontend/front_end/sources/CallStackSidebarPane.js(44,62): error TS2694: Namespace 'CallStackSidebarPane' has no exported member 'Item'.
-node_modules/chrome-devtools-frontend/front_end/sources/CallStackSidebarPane.js(45,56): error TS2345: Argument of type 'symbol' is not assignable to parameter of type '{ [x: string]: any; NonViewport: symbol; EqualHeightItems: symbol; VariousHeightItems: symbol; }'.
+node_modules/chrome-devtools-frontend/front_end/sources/CallStackSidebarPane.js(42,60): error TS2694: Namespace 'Sources.CallStackSidebarPane' has no exported member 'Item'.
+node_modules/chrome-devtools-frontend/front_end/sources/CallStackSidebarPane.js(44,62): error TS2694: Namespace 'Sources.CallStackSidebarPane' has no exported member 'Item'.
+node_modules/chrome-devtools-frontend/front_end/sources/CallStackSidebarPane.js(45,50): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; createElementForItem(item: T): Element; heightForItem(item: T): number; isIte...'.
+  Type 'CallStackSidebarPane' is not assignable to type '{ [x: string]: any; createElementForItem(item: T): Element; heightForItem(item: T): number; isIte...'.
+    Property '_blackboxedMessageElement' does not exist on type '{ [x: string]: any; createElementForItem(item: T): Element; heightForItem(item: T): number; isIte...'.
 node_modules/chrome-devtools-frontend/front_end/sources/CallStackSidebarPane.js(137,21): error TS2345: Argument of type '{ asyncStackHeader: string; }' is not assignable to parameter of type '{ debuggerCallFrame: CallFrame; debuggerModel: DebuggerModel; }'.
   Object literal may only specify known properties, and 'asyncStackHeader' does not exist in type '{ debuggerCallFrame: CallFrame; debuggerModel: DebuggerModel; }'.
 node_modules/chrome-devtools-frontend/front_end/sources/CallStackSidebarPane.js(163,13): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/sources/CallStackSidebarPane.js(182,44): error TS2694: Namespace 'CallStackSidebarPane' has no exported member 'Item'.
+node_modules/chrome-devtools-frontend/front_end/sources/CallStackSidebarPane.js(182,44): error TS2694: Namespace 'Sources.CallStackSidebarPane' has no exported member 'Item'.
 node_modules/chrome-devtools-frontend/front_end/sources/CallStackSidebarPane.js(187,25): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/sources/CallStackSidebarPane.js(209,33): error TS2339: Property 'createChild' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/sources/CallStackSidebarPane.js(219,44): error TS2694: Namespace 'CallStackSidebarPane' has no exported member 'Item'.
-node_modules/chrome-devtools-frontend/front_end/sources/CallStackSidebarPane.js(229,44): error TS2694: Namespace 'CallStackSidebarPane' has no exported member 'Item'.
-node_modules/chrome-devtools-frontend/front_end/sources/CallStackSidebarPane.js(238,44): error TS2694: Namespace 'CallStackSidebarPane' has no exported member 'Item'.
-node_modules/chrome-devtools-frontend/front_end/sources/CallStackSidebarPane.js(239,44): error TS2694: Namespace 'CallStackSidebarPane' has no exported member 'Item'.
-node_modules/chrome-devtools-frontend/front_end/sources/CallStackSidebarPane.js(253,44): error TS2694: Namespace 'CallStackSidebarPane' has no exported member 'Item'.
-node_modules/chrome-devtools-frontend/front_end/sources/CallStackSidebarPane.js(265,44): error TS2694: Namespace 'CallStackSidebarPane' has no exported member 'Item'.
+node_modules/chrome-devtools-frontend/front_end/sources/CallStackSidebarPane.js(219,44): error TS2694: Namespace 'Sources.CallStackSidebarPane' has no exported member 'Item'.
+node_modules/chrome-devtools-frontend/front_end/sources/CallStackSidebarPane.js(229,44): error TS2694: Namespace 'Sources.CallStackSidebarPane' has no exported member 'Item'.
+node_modules/chrome-devtools-frontend/front_end/sources/CallStackSidebarPane.js(238,44): error TS2694: Namespace 'Sources.CallStackSidebarPane' has no exported member 'Item'.
+node_modules/chrome-devtools-frontend/front_end/sources/CallStackSidebarPane.js(239,44): error TS2694: Namespace 'Sources.CallStackSidebarPane' has no exported member 'Item'.
+node_modules/chrome-devtools-frontend/front_end/sources/CallStackSidebarPane.js(253,44): error TS2694: Namespace 'Sources.CallStackSidebarPane' has no exported member 'Item'.
+node_modules/chrome-devtools-frontend/front_end/sources/CallStackSidebarPane.js(265,44): error TS2694: Namespace 'Sources.CallStackSidebarPane' has no exported member 'Item'.
 node_modules/chrome-devtools-frontend/front_end/sources/CallStackSidebarPane.js(285,13): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/sources/CallStackSidebarPane.js(286,31): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/sources/CallStackSidebarPane.js(287,31): error TS2555: Expected at least 2 arguments, but got 1.
@@ -12201,13 +11744,13 @@ node_modules/chrome-devtools-frontend/front_end/sources/CallStackSidebarPane.js(
 node_modules/chrome-devtools-frontend/front_end/sources/CallStackSidebarPane.js(302,31): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/sources/CallStackSidebarPane.js(319,47): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/sources/CallStackSidebarPane.js(320,45): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/sources/CallStackSidebarPane.js(338,44): error TS2694: Namespace 'CallStackSidebarPane' has no exported member 'Item'.
+node_modules/chrome-devtools-frontend/front_end/sources/CallStackSidebarPane.js(338,44): error TS2694: Namespace 'Sources.CallStackSidebarPane' has no exported member 'Item'.
 node_modules/chrome-devtools-frontend/front_end/sources/CallStackSidebarPane.js(370,13): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/sources/CallStackSidebarPane.js(373,13): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/sources/CallStackSidebarPane.js(379,13): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/sources/CallStackSidebarPane.js(382,13): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/sources/CallStackSidebarPane.js(411,27): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHost'.
-node_modules/chrome-devtools-frontend/front_end/sources/CallStackSidebarPane.js(415,52): error TS2694: Namespace 'KeyboardShortcut' has no exported member 'Descriptor'.
+node_modules/chrome-devtools-frontend/front_end/sources/CallStackSidebarPane.js(411,27): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/sources/CallStackSidebarPane.js(415,52): error TS2694: Namespace 'UI.KeyboardShortcut' has no exported member 'Descriptor'.
 node_modules/chrome-devtools-frontend/front_end/sources/CallStackSidebarPane.js(415,65): error TS1138: Parameter declaration expected.
 node_modules/chrome-devtools-frontend/front_end/sources/CallStackSidebarPane.js(415,65): error TS8024: JSDoc '@param' tag has name 'function', but there is no parameter with that name.
 node_modules/chrome-devtools-frontend/front_end/sources/CallStackSidebarPane.js(429,2): error TS1131: Property or signature expected.
@@ -12226,11 +11769,12 @@ node_modules/chrome-devtools-frontend/front_end/sources/DebuggerPausedMessage.js
 node_modules/chrome-devtools-frontend/front_end/sources/DebuggerPausedMessage.js(96,40): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/sources/DebuggerPausedMessage.js(101,41): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/sources/EditingLocationHistoryManager.js(54,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
+node_modules/chrome-devtools-frontend/front_end/sources/EditingLocationHistoryManager.js(107,31): error TS2345: Argument of type 'EditingLocationHistoryEntry' is not assignable to parameter of type '{ [x: string]: any; valid(): boolean; reveal(): void; }'.
+  Property '_sourcesView' does not exist on type '{ [x: string]: any; valid(): boolean; reveal(): void; }'.
 node_modules/chrome-devtools-frontend/front_end/sources/EventListenerBreakpointsSidebarPane.js(11,41): error TS2339: Property 'tabIndex' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/sources/EventListenerBreakpointsSidebarPane.js(15,74): error TS2694: Namespace 'EventListenerBreakpointsSidebarPane' has no exported member 'Item'.
-node_modules/chrome-devtools-frontend/front_end/sources/EventListenerBreakpointsSidebarPane.js(24,113): error TS2694: Namespace 'EventListenerBreakpointsSidebarPane' has no exported member 'Item'.
+node_modules/chrome-devtools-frontend/front_end/sources/EventListenerBreakpointsSidebarPane.js(15,74): error TS2694: Namespace 'Sources.EventListenerBreakpointsSidebarPane' has no exported member 'Item'.
+node_modules/chrome-devtools-frontend/front_end/sources/EventListenerBreakpointsSidebarPane.js(24,113): error TS2694: Namespace 'Sources.EventListenerBreakpointsSidebarPane' has no exported member 'Item'.
 node_modules/chrome-devtools-frontend/front_end/sources/EventListenerBreakpointsSidebarPane.js(57,33): error TS2339: Property 'createChild' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/sources/EventListenerBreakpointsSidebarPane.js(125,64): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/sources/EventListenerBreakpointsSidebarPane.js(126,45): error TS2300: Duplicate identifier 'Item'.
 node_modules/chrome-devtools-frontend/front_end/sources/EventListenerBreakpointsSidebarPane.js(126,45): error TS2339: Property 'Item' does not exist on type 'typeof EventListenerBreakpointsSidebarPane'.
 node_modules/chrome-devtools-frontend/front_end/sources/FilteredUISourceCodeListProvider.js(20,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
@@ -12274,9 +11818,6 @@ node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptBreakpointsSid
 node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptBreakpointsSidebarPane.js(203,26): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptBreakpointsSidebarPane.js(206,28): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptCompilerPlugin.js(97,9): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Error: string; Warning: string; }'.
-node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptSourceFrame.js(72,25): error TS2339: Property 'addEventListener' does not exist on type 'UISourceCode'.
-node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptSourceFrame.js(74,25): error TS2339: Property 'addEventListener' does not exist on type 'UISourceCode'.
-node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptSourceFrame.js(76,25): error TS2339: Property 'addEventListener' does not exist on type 'UISourceCode'.
 node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptSourceFrame.js(107,33): error TS2339: Property 'asParsedURL' does not exist on type 'string'.
 node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptSourceFrame.js(109,21): error TS2345: Argument of type 'ToolbarText' is not assignable to parameter of type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
   Type 'ToolbarText' is not assignable to type '{ [x: string]: any; item(): any & any; }'.
@@ -12299,6 +11840,7 @@ node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptSourceFrame.js
 node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptSourceFrame.js(237,42): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptSourceFrame.js(243,42): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptSourceFrame.js(244,42): error TS2555: Expected at least 2 arguments, but got 1.
+node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptSourceFrame.js(284,61): error TS2339: Property 'valuesArray' does not exist on type 'Map<DebuggerModel, ResourceScriptFile>'.
 node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptSourceFrame.js(285,38): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptSourceFrame.js(296,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptSourceFrame.js(309,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
@@ -12307,13 +11849,9 @@ node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptSourceFrame.js
 node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptSourceFrame.js(491,15): error TS2339: Property 'consume' does not exist on type 'KeyboardEvent'.
 node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptSourceFrame.js(517,37): error TS2339: Property 'enclosingNodeOrSelfWithClass' does not exist on type 'EventTarget'.
 node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptSourceFrame.js(545,11): error TS2339: Property 'consume' does not exist on type 'MouseEvent'.
-node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptSourceFrame.js(564,33): error TS2339: Property 'isAncestor' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptSourceFrame.js(611,34): error TS2339: Property 'value' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptSourceFrame.js(612,34): error TS2339: Property 'select' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptSourceFrame.js(618,41): error TS2339: Property 'createChild' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptSourceFrame.js(716,75): error TS2339: Property 'Debugger' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptSourceFrame.js(722,40): error TS2339: Property 'Debugger' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptSourceFrame.js(734,40): error TS2339: Property 'Debugger' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptSourceFrame.js(779,18): error TS2339: Property 'startColumn' does not exist on type 'never'.
 node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptSourceFrame.js(781,15): error TS2339: Property 'type' does not exist on type 'never'.
 node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptSourceFrame.js(790,15): error TS2339: Property 'type' does not exist on type 'never'.
@@ -12344,8 +11882,7 @@ node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptSourceFrame.js
 node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptSourceFrame.js(1190,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptSourceFrame.js(1201,56): error TS2339: Property 'valuesArray' does not exist on type 'Map<DebuggerModel, ResourceScriptFile>'.
 node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptSourceFrame.js(1210,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptSourceFrame.js(1270,16): error TS2403: Subsequent variable declarations must have the same type.  Variable 'location' must be of type 'any', but here has type 'UILocation'.
-node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptSourceFrame.js(1274,13): error TS2403: Subsequent variable declarations must have the same type.  Variable 'decoration' must be of type 'any', but here has type 'BreakpointDecoration'.
+node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptSourceFrame.js(1270,16): error TS2403: Subsequent variable declarations must have the same type.  Variable 'location' must be of type '{ lineNumber: number; columnNumber: number; }', but here has type 'UILocation'.
 node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptSourceFrame.js(1286,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptSourceFrame.js(1326,60): error TS2339: Property 'valuesArray' does not exist on type 'Set<BreakpointDecoration>'.
 node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptSourceFrame.js(1400,9): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Warning: string; Info: string; }'.
@@ -12357,13 +11894,8 @@ node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptSourceFrame.js
 node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptSourceFrame.js(1450,31): error TS2345: Argument of type 'ToolbarButton' is not assignable to parameter of type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
   Type 'ToolbarButton' is not assignable to type '{ [x: string]: any; item(): any & any; }'.
 node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptSourceFrame.js(1463,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptSourceFrame.js(1469,63): error TS2694: Namespace 'SourcesTextEditor' has no exported member 'GutterClickEventData'.
+node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptSourceFrame.js(1469,63): error TS2694: Namespace 'SourceFrame.SourcesTextEditor' has no exported member 'GutterClickEventData'.
 node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptSourceFrame.js(1506,34): error TS2345: Argument of type 'number' is not assignable to parameter of type '{ [x: string]: any; WindowDocked: number; WindowUndocked: number; ScriptsBreakpointSet: number; T...'.
-node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptSourceFrame.js(1572,25): error TS2339: Property 'removeEventListener' does not exist on type 'UISourceCode'.
-node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptSourceFrame.js(1574,25): error TS2339: Property 'removeEventListener' does not exist on type 'UISourceCode'.
-node_modules/chrome-devtools-frontend/front_end/sources/JavaScriptSourceFrame.js(1576,25): error TS2339: Property 'removeEventListener' does not exist on type 'UISourceCode'.
-node_modules/chrome-devtools-frontend/front_end/sources/NavigatorView.js(77,14): error TS2551: Property 'networkProjectManager' does not exist on type 'typeof Bindings'. Did you mean 'NetworkProjectManager'?
-node_modules/chrome-devtools-frontend/front_end/sources/NavigatorView.js(79,14): error TS2551: Property 'networkProjectManager' does not exist on type 'typeof Bindings'. Did you mean 'NetworkProjectManager'?
 node_modules/chrome-devtools-frontend/front_end/sources/NavigatorView.js(87,21): error TS2339: Property '_boostOrder' does not exist on type 'TreeElement'.
 node_modules/chrome-devtools-frontend/front_end/sources/NavigatorView.js(90,32): error TS2339: Property '_typeOrders' does not exist on type 'typeof NavigatorView'.
 node_modules/chrome-devtools-frontend/front_end/sources/NavigatorView.js(102,29): error TS2339: Property '_typeOrders' does not exist on type 'typeof NavigatorView'.
@@ -12407,7 +11939,7 @@ node_modules/chrome-devtools-frontend/front_end/sources/NavigatorView.js(738,11)
 node_modules/chrome-devtools-frontend/front_end/sources/NavigatorView.js(749,21): error TS2339: Property '_folderPath' does not exist on type 'NavigatorTreeNode'.
 node_modules/chrome-devtools-frontend/front_end/sources/NavigatorView.js(750,24): error TS2339: Property '_project' does not exist on type 'NavigatorTreeNode'.
 node_modules/chrome-devtools-frontend/front_end/sources/NavigatorView.js(759,9): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/sources/NavigatorView.js(759,69): error TS2339: Property 'showItemInFolder' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/sources/NavigatorView.js(759,69): error TS2339: Property 'showItemInFolder' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/sources/NavigatorView.js(762,11): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/sources/NavigatorView.js(767,11): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/sources/NavigatorView.js(771,41): error TS2555: Expected at least 2 arguments, but got 1.
@@ -12430,9 +11962,6 @@ node_modules/chrome-devtools-frontend/front_end/sources/NavigatorView.js(1236,27
 node_modules/chrome-devtools-frontend/front_end/sources/NavigatorView.js(1252,10): error TS2339: Property 'parent' does not exist on type 'NavigatorTreeNode'.
 node_modules/chrome-devtools-frontend/front_end/sources/NavigatorView.js(1261,20): error TS2339: Property 'remove' does not exist on type 'Map<string, NavigatorTreeNode>'.
 node_modules/chrome-devtools-frontend/front_end/sources/NavigatorView.js(1262,17): error TS2339: Property 'parent' does not exist on type 'NavigatorTreeNode'.
-node_modules/chrome-devtools-frontend/front_end/sources/NavigatorView.js(1345,26): error TS2339: Property 'addEventListener' does not exist on type 'UISourceCode'.
-node_modules/chrome-devtools-frontend/front_end/sources/NavigatorView.js(1346,26): error TS2339: Property 'addEventListener' does not exist on type 'UISourceCode'.
-node_modules/chrome-devtools-frontend/front_end/sources/NavigatorView.js(1347,26): error TS2339: Property 'addEventListener' does not exist on type 'UISourceCode'.
 node_modules/chrome-devtools-frontend/front_end/sources/NavigatorView.js(1391,10): error TS2339: Property 'parent' does not exist on type 'NavigatorUISourceCodeTreeNode'.
 node_modules/chrome-devtools-frontend/front_end/sources/NavigatorView.js(1392,10): error TS2339: Property 'parent' does not exist on type 'NavigatorUISourceCodeTreeNode'.
 node_modules/chrome-devtools-frontend/front_end/sources/NavigatorView.js(1405,39): error TS2339: Property 'focus' does not exist on type 'Element'.
@@ -12462,23 +11991,19 @@ node_modules/chrome-devtools-frontend/front_end/sources/ObjectEventListenersSide
 node_modules/chrome-devtools-frontend/front_end/sources/ObjectEventListenersSidebarPane.js(24,5): error TS2322: Type 'ToolbarButton[]' is not assignable to type '({ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; })[]'.
 node_modules/chrome-devtools-frontend/front_end/sources/ObjectEventListenersSidebarPane.js(84,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/sources/OpenFileQuickOpen.js(23,34): error TS2345: Argument of type 'number' is not assignable to parameter of type '{ [x: string]: any; WindowDocked: number; WindowUndocked: number; ScriptsBreakpointSet: number; T...'.
-node_modules/chrome-devtools-frontend/front_end/sources/OutlineQuickOpen.js(32,52): error TS2694: Namespace 'FormatterWorkerPool' has no exported member 'OutlineItem'.
+node_modules/chrome-devtools-frontend/front_end/sources/OutlineQuickOpen.js(32,52): error TS2694: Namespace 'Formatter.FormatterWorkerPool' has no exported member 'OutlineItem'.
 node_modules/chrome-devtools-frontend/front_end/sources/OutlineQuickOpen.js(118,14): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/sources/OutlineQuickOpen.js(120,14): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/sources/OutlineQuickOpen.js(121,12): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/sources/ScopeChainSidebarPane.js(60,25): error TS2339: Property 'removeChildren' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/sources/ScopeChainSidebarPane.js(65,33): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/sources/ScopeChainSidebarPane.js(79,23): error TS2339: Property 'Debugger' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sources/ScopeChainSidebarPane.js(81,30): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/sources/ScopeChainSidebarPane.js(88,19): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/sources/ScopeChainSidebarPane.js(94,19): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/sources/ScopeChainSidebarPane.js(99,23): error TS2339: Property 'Debugger' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sources/ScopeChainSidebarPane.js(104,21): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/sources/ScopeChainSidebarPane.js(105,30): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/sources/ScopeChainSidebarPane.js(114,20): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/sources/ScopeChainSidebarPane.js(115,20): error TS2339: Property 'createChild' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/sources/ScopeChainSidebarPane.js(122,37): error TS2339: Property 'Debugger' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/sources/ScopeChainSidebarPane.js(124,62): error TS2339: Property 'Debugger' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/sources/ScriptFormatterEditorAction.js(16,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/sources/ScriptFormatterEditorAction.js(28,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/sources/ScriptFormatterEditorAction.js(61,41): error TS2555: Expected at least 2 arguments, but got 1.
@@ -12486,23 +12011,24 @@ node_modules/chrome-devtools-frontend/front_end/sources/ScriptFormatterEditorAct
 node_modules/chrome-devtools-frontend/front_end/sources/SimpleHistoryManager.js(37,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 node_modules/chrome-devtools-frontend/front_end/sources/SnippetsPlugin.js(41,39): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/sources/SnippetsPlugin.js(41,73): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/sources/SnippetsPlugin.js(43,5): error TS2322: Type 'ToolbarToggle[]' is not assignable to type '({ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; })[]'.
 node_modules/chrome-devtools-frontend/front_end/sources/SnippetsPlugin.js(43,5): error TS2322: Type 'ToolbarToggle[]' is not assignable to type '({ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; })[]'.
   Type 'ToolbarToggle' is not assignable to type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
     Type 'ToolbarToggle' is not assignable to type '{ [x: string]: any; item(): any & any; }'.
       Property 'item' is missing in type 'ToolbarToggle'.
+node_modules/chrome-devtools-frontend/front_end/sources/SnippetsPlugin.js(43,5): error TS2322: Type 'ToolbarToggle[]' is not assignable to type '({ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; })[]'.
 node_modules/chrome-devtools-frontend/front_end/sources/SourceFormatter.js(36,47): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Debugger: string; Formatter: string; Network: string; Snippets: string; FileS...'.
 node_modules/chrome-devtools-frontend/front_end/sources/SourceFormatter.js(48,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/sources/SourceFormatter.js(55,32): error TS2339: Property 'remove' does not exist on type 'Map<UISourceCode, { promise: Promise<SourceFormatData>; formatData: SourceFormatData; }>'.
 node_modules/chrome-devtools-frontend/front_end/sources/SourceFormatter.js(67,32): error TS2339: Property 'remove' does not exist on type 'Map<UISourceCode, { promise: Promise<SourceFormatData>; formatData: SourceFormatData; }>'.
-node_modules/chrome-devtools-frontend/front_end/sources/SourceMapNamesResolver.js(33,33): error TS2339: Property 'Debugger' does not exist on type 'typeof Protocol'.
+node_modules/chrome-devtools-frontend/front_end/sources/SourceFormatter.js(155,56): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; rawLocationToUILocation(rawLocation: Location): UILocation; uiLocationToRawLo...'.
+  Type 'ScriptMapping' is not assignable to type '{ [x: string]: any; rawLocationToUILocation(rawLocation: Location): UILocation; uiLocationToRawLo...'.
+    Property '_setSourceMappingEnabled' does not exist on type '{ [x: string]: any; rawLocationToUILocation(rawLocation: Location): UILocation; uiLocationToRawLo...'.
 node_modules/chrome-devtools-frontend/front_end/sources/SourceMapNamesResolver.js(55,5): error TS2322: Type 'Promise<{ name: string; offset: number; }[]>' is not assignable to type 'Promise<Identifier[]>'.
   Type '{ name: string; offset: number; }[]' is not assignable to type 'Identifier[]'.
     Type '{ name: string; offset: number; }' is not assignable to type 'Identifier'.
       Property 'lineNumber' is missing in type '{ name: string; offset: number; }'.
 node_modules/chrome-devtools-frontend/front_end/sources/SourceMapNamesResolver.js(304,37): error TS2339: Property 'inverse' does not exist on type 'Map<string, string>'.
-node_modules/chrome-devtools-frontend/front_end/sources/SourceMapNamesResolver.js(322,32): error TS2694: Namespace 'RuntimeModel' has no exported member 'EvaluationResult'.
-node_modules/chrome-devtools-frontend/front_end/sources/SourceMapNamesResolver.js(338,33): error TS2339: Property 'Debugger' does not exist on type 'typeof Protocol'.
+node_modules/chrome-devtools-frontend/front_end/sources/SourceMapNamesResolver.js(322,32): error TS2694: Namespace 'SDK.RuntimeModel' has no exported member 'EvaluationResult'.
 node_modules/chrome-devtools-frontend/front_end/sources/SourceMapNamesResolver.js(361,25): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
 node_modules/chrome-devtools-frontend/front_end/sources/SourceMapNamesResolver.js(369,25): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
 node_modules/chrome-devtools-frontend/front_end/sources/SourceMapNamesResolver.js(417,25): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
@@ -12563,7 +12089,7 @@ node_modules/chrome-devtools-frontend/front_end/sources/SourcesPanel.js(257,7):
 node_modules/chrome-devtools-frontend/front_end/sources/SourcesPanel.js(257,7): error TS2322: Type '{ [x: string]: any; tabbedPane(): TabbedPane; enableMoreTabsButton(): void; }' is not assignable to type '{ [x: string]: any; appendApplicableItems(locationName: string): void; appendView(view: { [x: str...'.
 node_modules/chrome-devtools-frontend/front_end/sources/SourcesPanel.js(277,20): error TS2339: Property 'window' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/sources/SourcesPanel.js(289,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/sources/SourcesPanel.js(313,27): error TS2339: Property 'bringToFront' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/sources/SourcesPanel.js(313,27): error TS2339: Property 'bringToFront' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/sources/SourcesPanel.js(330,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/sources/SourcesPanel.js(356,44): error TS2339: Property '_instance' does not exist on type 'typeof WrapperView'.
 node_modules/chrome-devtools-frontend/front_end/sources/SourcesPanel.js(356,90): error TS2339: Property '_instance' does not exist on type 'typeof WrapperView'.
@@ -12614,11 +12140,15 @@ node_modules/chrome-devtools-frontend/front_end/sources/SourcesPanel.js(1112,5):
     Property 'button' is missing in type 'SourcesView'.
 node_modules/chrome-devtools-frontend/front_end/sources/SourcesPanel.js(1112,5): error TS2322: Type 'SourcesView' is not assignable to type '{ [x: string]: any; button(sourcesView: any & any): ToolbarButton; } & { [x: string]: any; button...'.
   Type 'SourcesView' is not assignable to type '{ [x: string]: any; button(sourcesView: any & any): ToolbarButton; }'.
-node_modules/chrome-devtools-frontend/front_end/sources/SourcesPanel.js(1125,27): error TS2339: Property 'upgradeDraggedFileSystemPermissions' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/sources/SourcesPanel.js(1125,27): error TS2339: Property 'upgradeDraggedFileSystemPermissions' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/sources/SourcesPanel.js(1290,38): error TS2339: Property '_instance' does not exist on type 'typeof WrapperView'.
 node_modules/chrome-devtools-frontend/front_end/sources/SourcesPanel.js(1298,47): error TS2339: Property '_instance' does not exist on type 'typeof WrapperView'.
 node_modules/chrome-devtools-frontend/front_end/sources/SourcesPanel.js(1298,93): error TS2339: Property '_instance' does not exist on type 'typeof WrapperView'.
 node_modules/chrome-devtools-frontend/front_end/sources/SourcesSearchScope.js(54,19): error TS2339: Property 'naturalOrderComparator' does not exist on type 'StringConstructor'.
+node_modules/chrome-devtools-frontend/front_end/sources/SourcesSearchScope.js(69,28): error TS2345: Argument of type 'SubProgress' is not assignable to parameter of type '{ [x: string]: any; setTotalWork(totalWork: number): void; setTitle(title: string): void; setWork...'.
+  Property '_composite' does not exist on type '{ [x: string]: any; setTotalWork(totalWork: number): void; setTitle(title: string): void; setWork...'.
+node_modules/chrome-devtools-frontend/front_end/sources/SourcesSearchScope.js(107,66): error TS2345: Argument of type 'SubProgress' is not assignable to parameter of type '{ [x: string]: any; setTotalWork(totalWork: number): void; setTitle(title: string): void; setWork...'.
+  Property '_composite' does not exist on type '{ [x: string]: any; setTotalWork(totalWork: number): void; setTitle(title: string): void; setWork...'.
 node_modules/chrome-devtools-frontend/front_end/sources/SourcesSearchScope.js(144,24): error TS2339: Property 'naturalOrderComparator' does not exist on type 'StringConstructor'.
 node_modules/chrome-devtools-frontend/front_end/sources/SourcesSearchScope.js(160,23): error TS2339: Property 'naturalOrderComparator' does not exist on type 'StringConstructor'.
 node_modules/chrome-devtools-frontend/front_end/sources/SourcesSearchScope.js(161,19): error TS2339: Property 'intersectOrdered' does not exist on type 'string[]'.
@@ -12626,6 +12156,12 @@ node_modules/chrome-devtools-frontend/front_end/sources/SourcesSearchScope.js(16
 node_modules/chrome-devtools-frontend/front_end/sources/SourcesSearchScope.js(163,19): error TS2339: Property 'mergeOrdered' does not exist on type 'string[]'.
 node_modules/chrome-devtools-frontend/front_end/sources/SourcesSearchScope.js(163,51): error TS2339: Property 'naturalOrderComparator' does not exist on type 'StringConstructor'.
 node_modules/chrome-devtools-frontend/front_end/sources/SourcesSearchScope.js(257,29): error TS2339: Property 'mergeOrdered' does not exist on type 'any[]'.
+node_modules/chrome-devtools-frontend/front_end/sources/SourcesView.js(22,50): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; searchCanceled(): void; performSearch(searchConfig: SearchConfig, shouldJump:...'.
+  Type 'SourcesView' is not assignable to type '{ [x: string]: any; searchCanceled(): void; performSearch(searchConfig: SearchConfig, shouldJump:...'.
+    Property '_searchableView' does not exist on type '{ [x: string]: any; searchCanceled(): void; performSearch(searchConfig: SearchConfig, shouldJump:...'.
+node_modules/chrome-devtools-frontend/front_end/sources/SourcesView.js(30,9): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; viewForFile(uiSourceCode: UISourceCode): Widget; }'.
+  Type 'SourcesView' is not assignable to type '{ [x: string]: any; viewForFile(uiSourceCode: UISourceCode): Widget; }'.
+    Property '_searchableView' does not exist on type '{ [x: string]: any; viewForFile(uiSourceCode: UISourceCode): Widget; }'.
 node_modules/chrome-devtools-frontend/front_end/sources/SourcesView.js(36,70): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; button(sourcesView: any & any): ToolbarButton; } & { [x: string]: any; button...'.
   Type 'SourcesView' is not assignable to type '{ [x: string]: any; button(sourcesView: any & any): ToolbarButton; } & { [x: string]: any; button...'.
     Type 'SourcesView' is not assignable to type '{ [x: string]: any; button(sourcesView: any & any): ToolbarButton; }'.
@@ -12634,28 +12170,32 @@ node_modules/chrome-devtools-frontend/front_end/sources/SourcesView.js(36,70): e
           Property 'button' is missing in type 'SourcesView'.
 node_modules/chrome-devtools-frontend/front_end/sources/SourcesView.js(38,50): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/sources/SourcesView.js(41,10): error TS2339: Property 'runtime' does not exist on type 'Window'.
-node_modules/chrome-devtools-frontend/front_end/sources/SourcesView.js(55,36): error TS2694: Namespace 'EventTarget' has no exported member 'EventDescriptor'.
+node_modules/chrome-devtools-frontend/front_end/sources/SourcesView.js(55,36): error TS2694: Namespace 'Common.EventTarget' has no exported member 'EventDescriptor'.
 node_modules/chrome-devtools-frontend/front_end/sources/SourcesView.js(83,27): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/sources/SourcesView.js(101,49): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/sources/SourcesView.js(102,51): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/sources/SourcesView.js(108,25): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/sources/SourcesView.js(113,15): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/sources/SourcesView.js(113,48): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/sources/SourcesView.js(134,52): error TS2694: Namespace 'KeyboardShortcut' has no exported member 'Descriptor'.
+node_modules/chrome-devtools-frontend/front_end/sources/SourcesView.js(134,52): error TS2694: Namespace 'UI.KeyboardShortcut' has no exported member 'Descriptor'.
 node_modules/chrome-devtools-frontend/front_end/sources/SourcesView.js(134,65): error TS1138: Parameter declaration expected.
 node_modules/chrome-devtools-frontend/front_end/sources/SourcesView.js(134,65): error TS8024: JSDoc '@param' tag has name 'function', but there is no parameter with that name.
-node_modules/chrome-devtools-frontend/front_end/sources/SourcesView.js(139,45): error TS2694: Namespace 'KeyboardShortcut' has no exported member 'Descriptor'.
-node_modules/chrome-devtools-frontend/front_end/sources/SourcesView.js(190,43): error TS2694: Namespace 'KeyboardShortcut' has no exported member 'Descriptor'.
+node_modules/chrome-devtools-frontend/front_end/sources/SourcesView.js(139,45): error TS2694: Namespace 'UI.KeyboardShortcut' has no exported member 'Descriptor'.
+node_modules/chrome-devtools-frontend/front_end/sources/SourcesView.js(190,43): error TS2694: Namespace 'UI.KeyboardShortcut' has no exported member 'Descriptor'.
 node_modules/chrome-devtools-frontend/front_end/sources/SourcesView.js(287,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/sources/SourcesView.js(379,18): error TS2339: Property 'addEventListener' does not exist on type 'UISourceCode'.
+node_modules/chrome-devtools-frontend/front_end/sources/SourcesView.js(367,71): error TS2345: Argument of type 'UISourceCode' is not assignable to parameter of type '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
+  Property '_project' does not exist on type '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
+node_modules/chrome-devtools-frontend/front_end/sources/SourcesView.js(369,70): error TS2345: Argument of type 'UISourceCode' is not assignable to parameter of type '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
+  Property '_project' does not exist on type '{ [x: string]: any; contentURL(): string; contentType(): ResourceType; contentEncoded(): Promise<...'.
 node_modules/chrome-devtools-frontend/front_end/sources/SourcesView.js(432,36): error TS2339: Property 'remove' does not exist on type 'Map<UISourceCode, Widget>'.
-node_modules/chrome-devtools-frontend/front_end/sources/SourcesView.js(433,18): error TS2339: Property 'removeEventListener' does not exist on type 'UISourceCode'.
 node_modules/chrome-devtools-frontend/front_end/sources/SourcesView.js(472,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/sources/SourcesView.js(494,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/sources/SourcesView.js(530,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/sources/SourcesView.js(724,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 node_modules/chrome-devtools-frontend/front_end/sources/SourcesView.js(761,28): error TS2339: Property 'naturalOrderComparator' does not exist on type 'StringConstructor'.
 node_modules/chrome-devtools-frontend/front_end/sources/TabbedEditorContainer.js(36,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
+node_modules/chrome-devtools-frontend/front_end/sources/TabbedEditorContainer.js(56,37): error TS2345: Argument of type 'EditorContainerTabDelegate' is not assignable to parameter of type '{ [x: string]: any; closeTabs(tabbedPane: TabbedPane, ids: string[]): void; onContextMenu(tabId: ...'.
+  Property '_editorContainer' does not exist on type '{ [x: string]: any; closeTabs(tabbedPane: TabbedPane, ids: string[]): void; onContextMenu(tabId: ...'.
 node_modules/chrome-devtools-frontend/front_end/sources/TabbedEditorContainer.js(77,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/sources/TabbedEditorContainer.js(109,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/sources/TabbedEditorContainer.js(201,50): error TS2339: Property 'textEditor' does not exist on type 'Widget'.
@@ -12671,39 +12211,18 @@ node_modules/chrome-devtools-frontend/front_end/sources/TabbedEditorContainer.js
 node_modules/chrome-devtools-frontend/front_end/sources/TabbedEditorContainer.js(473,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/sources/TabbedEditorContainer.js(485,18): error TS2339: Property 'remove' does not exist on type 'Map<any, any>'.
 node_modules/chrome-devtools-frontend/front_end/sources/TabbedEditorContainer.js(497,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/sources/TabbedEditorContainer.js(511,18): error TS2339: Property 'addEventListener' does not exist on type 'UISourceCode'.
-node_modules/chrome-devtools-frontend/front_end/sources/TabbedEditorContainer.js(512,18): error TS2339: Property 'addEventListener' does not exist on type 'UISourceCode'.
-node_modules/chrome-devtools-frontend/front_end/sources/TabbedEditorContainer.js(514,18): error TS2339: Property 'addEventListener' does not exist on type 'UISourceCode'.
-node_modules/chrome-devtools-frontend/front_end/sources/TabbedEditorContainer.js(522,18): error TS2339: Property 'removeEventListener' does not exist on type 'UISourceCode'.
-node_modules/chrome-devtools-frontend/front_end/sources/TabbedEditorContainer.js(523,18): error TS2339: Property 'removeEventListener' does not exist on type 'UISourceCode'.
-node_modules/chrome-devtools-frontend/front_end/sources/TabbedEditorContainer.js(525,18): error TS2339: Property 'removeEventListener' does not exist on type 'UISourceCode'.
 node_modules/chrome-devtools-frontend/front_end/sources/TabbedEditorContainer.js(540,22): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/sources/TabbedEditorContainer.js(549,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/sources/TabbedEditorContainer.js(558,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/sources/TabbedEditorContainer.js(566,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/sources/ThreadsSidebarPane.js(16,50): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; createElementForItem(item: T): Element; heightForItem(item: T): number; isIte...'.
   Type 'ThreadsSidebarPane' is not assignable to type '{ [x: string]: any; createElementForItem(item: T): Element; heightForItem(item: T): number; isIte...'.
-    Types of property 'createElementForItem' are incompatible.
-      Type '(debuggerModel: DebuggerModel) => Element' is not assignable to type '(item: T) => Element'.
-        Types of parameters 'debuggerModel' and 'item' are incompatible.
-          Type 'T' is not assignable to type 'DebuggerModel'.
+    Property '_items' does not exist on type '{ [x: string]: any; createElementForItem(item: T): Element; heightForItem(item: T): number; isIte...'.
 node_modules/chrome-devtools-frontend/front_end/sources/ThreadsSidebarPane.js(38,25): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/sources/ThreadsSidebarPane.js(39,31): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/sources/ThreadsSidebarPane.js(49,33): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/sources/ThreadsSidebarPane.js(53,24): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/sources/ThreadsSidebarPane.js(126,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/sources/UISourceCodeFrame.js(54,24): error TS2339: Property 'addEventListener' does not exist on type 'UISourceCode'.
-node_modules/chrome-devtools-frontend/front_end/sources/UISourceCodeFrame.js(56,24): error TS2339: Property 'addEventListener' does not exist on type 'UISourceCode'.
-node_modules/chrome-devtools-frontend/front_end/sources/UISourceCodeFrame.js(99,27): error TS2339: Property 'addEventListener' does not exist on type 'UISourceCode'.
-node_modules/chrome-devtools-frontend/front_end/sources/UISourceCodeFrame.js(100,27): error TS2339: Property 'addEventListener' does not exist on type 'UISourceCode'.
-node_modules/chrome-devtools-frontend/front_end/sources/UISourceCodeFrame.js(101,27): error TS2339: Property 'addEventListener' does not exist on type 'UISourceCode'.
-node_modules/chrome-devtools-frontend/front_end/sources/UISourceCodeFrame.js(103,27): error TS2339: Property 'addEventListener' does not exist on type 'UISourceCode'.
-node_modules/chrome-devtools-frontend/front_end/sources/UISourceCodeFrame.js(106,30): error TS2339: Property 'addEventListener' does not exist on type 'UISourceCode'.
-node_modules/chrome-devtools-frontend/front_end/sources/UISourceCodeFrame.js(107,30): error TS2339: Property 'addEventListener' does not exist on type 'UISourceCode'.
-node_modules/chrome-devtools-frontend/front_end/sources/UISourceCodeFrame.js(112,28): error TS2339: Property 'addEventListener' does not exist on type 'UISourceCode'.
-node_modules/chrome-devtools-frontend/front_end/sources/UISourceCodeFrame.js(113,28): error TS2339: Property 'addEventListener' does not exist on type 'UISourceCode'.
-node_modules/chrome-devtools-frontend/front_end/sources/UISourceCodeFrame.js(114,28): error TS2339: Property 'addEventListener' does not exist on type 'UISourceCode'.
-node_modules/chrome-devtools-frontend/front_end/sources/UISourceCodeFrame.js(116,28): error TS2339: Property 'addEventListener' does not exist on type 'UISourceCode'.
 node_modules/chrome-devtools-frontend/front_end/sources/UISourceCodeFrame.js(204,19): error TS2339: Property 'addAll' does not exist on type 'Set<Message>'.
 node_modules/chrome-devtools-frontend/front_end/sources/UISourceCodeFrame.js(229,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/sources/UISourceCodeFrame.js(239,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
@@ -12717,7 +12236,6 @@ node_modules/chrome-devtools-frontend/front_end/sources/UISourceCodeFrame.js(443
 node_modules/chrome-devtools-frontend/front_end/sources/UISourceCodeFrame.js(461,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/sources/UISourceCodeFrame.js(469,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/sources/UISourceCodeFrame.js(483,10): error TS2339: Property 'runtime' does not exist on type 'Window'.
-node_modules/chrome-devtools-frontend/front_end/sources/UISourceCodeFrame.js(488,40): error TS2339: Property 'operation' does not exist on type 'CodeMirror'.
 node_modules/chrome-devtools-frontend/front_end/sources/UISourceCodeFrame.js(496,32): error TS2339: Property 'runtime' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/sources/UISourceCodeFrame.js(511,24): error TS2339: Property 'pushAll' does not exist on type '({ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; })[]'.
 node_modules/chrome-devtools-frontend/front_end/sources/UISourceCodeFrame.js(512,25): error TS2339: Property 'pushAll' does not exist on type 'any[]'.
@@ -12728,7 +12246,7 @@ node_modules/chrome-devtools-frontend/front_end/sources/UISourceCodeFrame.js(551
 node_modules/chrome-devtools-frontend/front_end/sources/UISourceCodeFrame.js(552,39): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/sources/UISourceCodeFrame.js(603,22): error TS2339: Property '_messageBucket' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/sources/UISourceCodeFrame.js(604,35): error TS2339: Property 'createChild' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/sources/UISourceCodeFrame.js(624,32): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/sources/UISourceCodeFrame.js(624,42): error TS2339: Property 'lineIndent' does not exist on type 'typeof TextUtils'.
 node_modules/chrome-devtools-frontend/front_end/sources/UISourceCodeFrame.js(638,38): error TS2339: Property 'removeChildren' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/sources/UISourceCodeFrame.js(652,23): error TS2339: Property 'toggleLineClass' does not exist on type 'CodeMirrorTextEditor'.
 node_modules/chrome-devtools-frontend/front_end/sources/UISourceCodeFrame.js(652,96): error TS2538: Type '{ [x: string]: any; Error: string; Warning: string; }' cannot be used as an index type.
@@ -12780,7 +12298,7 @@ node_modules/chrome-devtools-frontend/front_end/sources/WatchExpressionsSidebarP
 node_modules/chrome-devtools-frontend/front_end/sources/WatchExpressionsSidebarPane.js(428,24): error TS2339: Property 'deepElementFromPoint' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/sources/WatchExpressionsSidebarPane.js(429,38): error TS2339: Property 'isSelfOrAncestor' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/sources/WatchExpressionsSidebarPane.js(430,7): error TS2554: Expected 3 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/sources/WatchExpressionsSidebarPane.js(434,27): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/sources/WatchExpressionsSidebarPane.js(434,27): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/sources/WorkspaceMappingTip.js(28,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/sources/WorkspaceMappingTip.js(39,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/sources/WorkspaceMappingTip.js(107,25): error TS2339: Property 'asParsedURL' does not exist on type 'string'.
@@ -12800,11 +12318,11 @@ node_modules/chrome-devtools-frontend/front_end/sources/XHRBreakpointsSidebarPan
 node_modules/chrome-devtools-frontend/front_end/sources/XHRBreakpointsSidebarPane.js(15,46): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/sources/XHRBreakpointsSidebarPane.js(16,38): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/sources/XHRBreakpointsSidebarPane.js(21,44): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/sources/XHRBreakpointsSidebarPane.js(34,5): error TS2322: Type 'ToolbarButton[]' is not assignable to type '({ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; })[]'.
 node_modules/chrome-devtools-frontend/front_end/sources/XHRBreakpointsSidebarPane.js(34,5): error TS2322: Type 'ToolbarButton[]' is not assignable to type '({ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; })[]'.
   Type 'ToolbarButton' is not assignable to type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
     Type 'ToolbarButton' is not assignable to type '{ [x: string]: any; item(): any & any; }'.
       Property 'item' is missing in type 'ToolbarButton'.
+node_modules/chrome-devtools-frontend/front_end/sources/XHRBreakpointsSidebarPane.js(34,5): error TS2322: Type 'ToolbarButton[]' is not assignable to type '({ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; })[]'.
 node_modules/chrome-devtools-frontend/front_end/sources/XHRBreakpointsSidebarPane.js(39,45): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/sources/XHRBreakpointsSidebarPane.js(47,41): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/sources/XHRBreakpointsSidebarPane.js(49,46): error TS2339: Property 'createChild' does not exist on type 'Element'.
@@ -12819,27 +12337,7 @@ node_modules/chrome-devtools-frontend/front_end/sources/XHRBreakpointsSidebarPan
 node_modules/chrome-devtools-frontend/front_end/sources/XHRBreakpointsSidebarPane.js(158,45): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/sources/XHRBreakpointsSidebarPane.js(159,45): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/sources/XHRBreakpointsSidebarPane.js(186,41): error TS2339: Property '_checkboxElement' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/BreakpointManagerTestRunner.js(13,21): error TS2339: Property 'testTargetManager' does not exist on type 'typeof SourcesTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/BreakpointManagerTestRunner.js(14,21): error TS2339: Property 'testWorkspace' does not exist on type 'typeof SourcesTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/BreakpointManagerTestRunner.js(15,21): error TS2339: Property 'testNetworkProjectManager' does not exist on type 'typeof SourcesTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/BreakpointManagerTestRunner.js(16,60): error TS2339: Property 'testTargetManager' does not exist on type 'typeof SourcesTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/BreakpointManagerTestRunner.js(16,97): error TS2339: Property 'testWorkspace' does not exist on type 'typeof SourcesTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/BreakpointManagerTestRunner.js(17,21): error TS2339: Property 'testResourceMapping' does not exist on type 'typeof SourcesTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/BreakpointManagerTestRunner.js(18,54): error TS2339: Property 'testTargetManager' does not exist on type 'typeof SourcesTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/BreakpointManagerTestRunner.js(18,91): error TS2339: Property 'testWorkspace' does not exist on type 'typeof SourcesTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/BreakpointManagerTestRunner.js(19,21): error TS2339: Property 'testDebuggerWorkspaceBinding' does not exist on type 'typeof SourcesTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/BreakpointManagerTestRunner.js(20,63): error TS2339: Property 'testTargetManager' does not exist on type 'typeof SourcesTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/BreakpointManagerTestRunner.js(20,100): error TS2339: Property 'testWorkspace' does not exist on type 'typeof SourcesTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/BreakpointManagerTestRunner.js(21,12): error TS2551: Property 'resourceMapping' does not exist on type 'typeof Bindings'. Did you mean 'ResourceMapping'?
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/BreakpointManagerTestRunner.js(21,48): error TS2339: Property 'testResourceMapping' does not exist on type 'typeof SourcesTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/BreakpointManagerTestRunner.js(26,56): error TS2339: Property 'testResourceMapping' does not exist on type 'typeof SourcesTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/BreakpointManagerTestRunner.js(33,34): error TS2339: Property 'testTargetManager' does not exist on type 'typeof SourcesTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/BreakpointManagerTestRunner.js(37,21): error TS2339: Property 'testNetworkProject' does not exist on type 'typeof SourcesTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/BreakpointManagerTestRunner.js(38,21): error TS2339: Property 'testResourceMappingModelInfo' does not exist on type 'typeof SourcesTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/BreakpointManagerTestRunner.js(40,37): error TS2339: Property 'mainTarget' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/BreakpointManagerTestRunner.js(47,21): error TS2339: Property 'testTargetManager' does not exist on type 'typeof SourcesTestRunner'.
 node_modules/chrome-devtools-frontend/front_end/sources_test_runner/BreakpointManagerTestRunner.js(81,30): error TS2554: Expected 1 arguments, but got 0.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/BreakpointManagerTestRunner.js(86,56): error TS2339: Property 'testDebuggerWorkspaceBinding' does not exist on type 'typeof SourcesTestRunner'.
 node_modules/chrome-devtools-frontend/front_end/sources_test_runner/BreakpointManagerTestRunner.js(110,18): error TS2554: Expected 14 arguments, but got 3.
 node_modules/chrome-devtools-frontend/front_end/sources_test_runner/BreakpointManagerTestRunner.js(132,18): error TS2339: Property 'setBreakpointCallback' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/sources_test_runner/BreakpointManagerTestRunner.js(133,36): error TS2339: Property 'setBreakpointCallback' does not exist on type 'Window'.
@@ -12851,59 +12349,16 @@ node_modules/chrome-devtools-frontend/front_end/sources_test_runner/BreakpointMa
 node_modules/chrome-devtools-frontend/front_end/sources_test_runner/BreakpointManagerTestRunner.js(170,60): error TS2345: Argument of type 'this' is not assignable to parameter of type 'DebuggerModel'.
 node_modules/chrome-devtools-frontend/front_end/sources_test_runner/BreakpointManagerTestRunner.js(179,53): error TS2345: Argument of type 'this' is not assignable to parameter of type 'DebuggerModel'.
 node_modules/chrome-devtools-frontend/front_end/sources_test_runner/BreakpointManagerTestRunner.js(250,3): error TS2304: Cannot find name 'uiSourceCode'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/BreakpointManagerTestRunner.js(250,36): error TS2339: Property 'testWorkspace' does not exist on type 'typeof SourcesTestRunner'.
 node_modules/chrome-devtools-frontend/front_end/sources_test_runner/BreakpointManagerTestRunner.js(251,42): error TS2304: Cannot find name 'uiSourceCode'.
 node_modules/chrome-devtools-frontend/front_end/sources_test_runner/BreakpointManagerTestRunner.js(257,10): error TS2304: Cannot find name 'uiSourceCode'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/BreakpointManagerTestRunner.js(261,21): error TS2339: Property '_pendingBreakpointUpdates' does not exist on type 'typeof SourcesTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/BreakpointManagerTestRunner.js(268,23): error TS2339: Property '_pendingBreakpointUpdates' does not exist on type 'typeof SourcesTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/BreakpointManagerTestRunner.js(272,23): error TS2339: Property '_pendingBreakpointUpdates' does not exist on type 'typeof SourcesTestRunner'.
 node_modules/chrome-devtools-frontend/front_end/sources_test_runner/BreakpointManagerTestRunner.js(317,7): error TS2345: Argument of type '{ [x: string]: any; get: () => any; set: (breakpoints: any) => void; }' is not assignable to parameter of type 'Setting<any>'.
   Property '_settings' is missing in type '{ [x: string]: any; get: () => any; set: (breakpoints: any) => void; }'.
 node_modules/chrome-devtools-frontend/front_end/sources_test_runner/BreakpointManagerTestRunner.js(333,12): error TS2339: Property 'setBreakpointCallback' does not exist on type 'Window'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/BreakpointManagerTestRunner.js(397,21): error TS2339: Property '_pendingBreakpointUpdatesCallback' does not exist on type 'typeof SourcesTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/BreakpointManagerTestRunner.js(402,26): error TS2339: Property '_pendingBreakpointUpdates' does not exist on type 'typeof SourcesTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/BreakpointManagerTestRunner.js(402,73): error TS2339: Property '_pendingBreakpointUpdatesCallback' does not exist on type 'typeof SourcesTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/BreakpointManagerTestRunner.js(403,38): error TS2339: Property '_pendingBreakpointUpdatesCallback' does not exist on type 'typeof SourcesTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/BreakpointManagerTestRunner.js(404,30): error TS2339: Property '_pendingBreakpointUpdatesCallback' does not exist on type 'typeof SourcesTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/DebuggerTestRunner.js(11,29): error TS2339: Property 'debuggerModel' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/DebuggerTestRunner.js(14,23): error TS2339: Property '_quiet' does not exist on type 'typeof SourcesTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/DebuggerTestRunner.js(97,22): error TS2339: Property 'DebuggerAgent' does not exist on type 'typeof TestRunner'.
 node_modules/chrome-devtools-frontend/front_end/sources_test_runner/DebuggerTestRunner.js(125,28): error TS2339: Property 'sprintf' does not exist on type 'StringConstructor'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/DebuggerTestRunner.js(136,21): error TS2339: Property '_waitUntilPausedCallback' does not exist on type 'typeof SourcesTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/DebuggerTestRunner.js(142,25): error TS2339: Property '_pausedScriptArguments' does not exist on type 'typeof SourcesTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/DebuggerTestRunner.js(143,48): error TS2339: Property '_pausedScriptArguments' does not exist on type 'typeof SourcesTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/DebuggerTestRunner.js(145,23): error TS2339: Property '_waitUntilPausedCallback' does not exist on type 'typeof SourcesTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/DebuggerTestRunner.js(153,21): error TS2339: Property '_waitUntilResumedCallback' does not exist on type 'typeof SourcesTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/DebuggerTestRunner.js(159,26): error TS2339: Property '_pausedScriptArguments' does not exist on type 'typeof SourcesTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/DebuggerTestRunner.js(162,23): error TS2339: Property '_waitUntilResumedCallback' does not exist on type 'typeof SourcesTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/DebuggerTestRunner.js(170,10): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/DebuggerTestRunner.js(171,8): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/DebuggerTestRunner.js(212,8): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/DebuggerTestRunner.js(218,8): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/DebuggerTestRunner.js(224,8): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/DebuggerTestRunner.js(230,8): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/DebuggerTestRunner.js(343,36): error TS2339: Property 'debuggerModel' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/DebuggerTestRunner.js(366,26): error TS2339: Property '_quiet' does not exist on type 'typeof SourcesTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/DebuggerTestRunner.js(369,28): error TS2339: Property 'target' does not exist on type 'typeof SourcesTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/DebuggerTestRunner.js(370,21): error TS2339: Property '_pausedScriptArguments' does not exist on type 'typeof SourcesTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/DebuggerTestRunner.js(375,25): error TS2339: Property '_waitUntilPausedCallback' does not exist on type 'typeof SourcesTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/DebuggerTestRunner.js(376,38): error TS2339: Property '_waitUntilPausedCallback' does not exist on type 'typeof SourcesTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/DebuggerTestRunner.js(377,30): error TS2339: Property '_waitUntilPausedCallback' does not exist on type 'typeof SourcesTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/DebuggerTestRunner.js(378,65): error TS2339: Property '_pausedScriptArguments' does not exist on type 'typeof SourcesTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/DebuggerTestRunner.js(383,26): error TS2339: Property '_quiet' does not exist on type 'typeof SourcesTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/DebuggerTestRunner.js(386,28): error TS2339: Property '_pausedScriptArguments' does not exist on type 'typeof SourcesTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/DebuggerTestRunner.js(388,25): error TS2339: Property '_waitUntilResumedCallback' does not exist on type 'typeof SourcesTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/DebuggerTestRunner.js(389,38): error TS2339: Property '_waitUntilResumedCallback' does not exist on type 'typeof SourcesTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/DebuggerTestRunner.js(390,30): error TS2339: Property '_waitUntilResumedCallback' does not exist on type 'typeof SourcesTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/DebuggerTestRunner.js(396,18): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/DebuggerTestRunner.js(426,18): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
 node_modules/chrome-devtools-frontend/front_end/sources_test_runner/DebuggerTestRunner.js(483,26): error TS2339: Property 'runtime' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/sources_test_runner/DebuggerTestRunner.js(515,23): error TS2339: Property 'runtime' does not exist on type 'Window'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/DebuggerTestRunner.js(584,21): error TS2339: Property '_quiet' does not exist on type 'typeof SourcesTestRunner'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/DebuggerTestRunner.js(588,28): error TS2339: Property 'debuggerModel' does not exist on type 'typeof TestRunner'.
 node_modules/chrome-devtools-frontend/front_end/sources_test_runner/DebuggerTestRunner.js(644,15): error TS2339: Property 'runtime' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/sources_test_runner/DebuggerTestRunner.js(671,26): error TS2339: Property 'runtime' does not exist on type 'Window'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/DebuggerTestRunner.js(676,21): error TS2339: Property 'debuggerModel' does not exist on type 'typeof TestRunner'.
 node_modules/chrome-devtools-frontend/front_end/sources_test_runner/DebuggerTestRunner.js(709,100): error TS2551: Property '_bookmarkSymbol' does not exist on type 'typeof BreakpointDecoration'. Did you mean 'bookmarkSymbol'?
 node_modules/chrome-devtools-frontend/front_end/sources_test_runner/DebuggerTestRunner.js(730,102): error TS2551: Property '_bookmarkSymbol' does not exist on type 'typeof BreakpointDecoration'. Did you mean 'bookmarkSymbol'?
 node_modules/chrome-devtools-frontend/front_end/sources_test_runner/DebuggerTestRunner.js(743,19): error TS2339: Property 'runtime' does not exist on type 'Window'.
@@ -12912,7 +12367,6 @@ node_modules/chrome-devtools-frontend/front_end/sources_test_runner/EditorTestRu
 node_modules/chrome-devtools-frontend/front_end/sources_test_runner/SearchTestRunner.js(91,3): error TS2304: Cannot find name 'editor'.
 node_modules/chrome-devtools-frontend/front_end/sources_test_runner/SearchTestRunner.js(94,23): error TS2304: Cannot find name 'editor'.
 node_modules/chrome-devtools-frontend/front_end/sources_test_runner/SearchTestRunner.js(95,19): error TS2304: Cannot find name 'editor'.
-node_modules/chrome-devtools-frontend/front_end/sources_test_runner/SearchTestRunner.js(97,27): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
 node_modules/chrome-devtools-frontend/front_end/sources_test_runner/SearchTestRunner.js(114,23): error TS2304: Cannot find name 'editor'.
 node_modules/chrome-devtools-frontend/front_end/sources_test_runner/SearchTestRunner.js(115,19): error TS2304: Cannot find name 'editor'.
 node_modules/chrome-devtools-frontend/front_end/sources_test_runner/SourcesTestRunner.js(26,29): error TS2339: Property 'map' does not exist on type 'NodeListOf<Element>'.
@@ -13023,9 +12477,6 @@ node_modules/chrome-devtools-frontend/front_end/terminal/xterm.js/build/xterm.js
 node_modules/chrome-devtools-frontend/front_end/terminal/xterm.js/build/xterm.js(4174,10): error TS2339: Property 'emit' does not exist on type 'Terminal'.
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(13,6): error TS2339: Property 'testRunner' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(24,8): error TS2339: Property 'testRunner' does not exist on type 'Window'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(25,38): error TS2339: Property '_startupTestSetupFinished' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(26,16): error TS2339: Property '_initializeTargetForStartupTest' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(27,23): error TS2339: Property '_startupTestSetupFinished' does not exist on type 'typeof TestRunner'.
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(42,21): error TS2339: Property 'testRunner' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(45,18): error TS2339: Property 'eval' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(76,8): error TS2339: Property 'testRunner' does not exist on type 'Window'.
@@ -13041,70 +12492,30 @@ node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(299,53
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(313,22): error TS2339: Property 'traverseNextNode' does not exist on type 'Node'.
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(314,31): error TS2339: Property 'traverseNextNode' does not exist on type 'Node'.
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(318,33): error TS2339: Property 'traverseNextNode' does not exist on type 'Node'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(327,14): error TS2339: Property 'CSSAgent' does not exist on type 'typeof TestRunner'.
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(327,32): error TS2339: Property 'cssAgent' does not exist on type 'Target'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(328,14): error TS2339: Property 'DeviceOrientationAgent' does not exist on type 'typeof TestRunner'.
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(328,46): error TS2339: Property 'deviceOrientationAgent' does not exist on type 'Target'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(329,14): error TS2339: Property 'DOMAgent' does not exist on type 'typeof TestRunner'.
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(329,32): error TS2339: Property 'domAgent' does not exist on type 'Target'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(330,14): error TS2339: Property 'DOMDebuggerAgent' does not exist on type 'typeof TestRunner'.
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(330,40): error TS2339: Property 'domdebuggerAgent' does not exist on type 'Target'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(331,14): error TS2339: Property 'DebuggerAgent' does not exist on type 'typeof TestRunner'.
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(331,37): error TS2339: Property 'debuggerAgent' does not exist on type 'Target'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(332,14): error TS2339: Property 'EmulationAgent' does not exist on type 'typeof TestRunner'.
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(332,38): error TS2339: Property 'emulationAgent' does not exist on type 'Target'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(333,14): error TS2339: Property 'HeapProfilerAgent' does not exist on type 'typeof TestRunner'.
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(333,41): error TS2339: Property 'heapProfilerAgent' does not exist on type 'Target'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(334,14): error TS2339: Property 'InspectorAgent' does not exist on type 'typeof TestRunner'.
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(334,38): error TS2339: Property 'inspectorAgent' does not exist on type 'Target'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(335,14): error TS2339: Property 'NetworkAgent' does not exist on type 'typeof TestRunner'.
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(335,36): error TS2339: Property 'networkAgent' does not exist on type 'Target'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(336,14): error TS2339: Property 'OverlayAgent' does not exist on type 'typeof TestRunner'.
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(336,36): error TS2339: Property 'overlayAgent' does not exist on type 'Target'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(337,14): error TS2339: Property 'PageAgent' does not exist on type 'typeof TestRunner'.
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(337,33): error TS2339: Property 'pageAgent' does not exist on type 'Target'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(338,14): error TS2339: Property 'ProfilerAgent' does not exist on type 'typeof TestRunner'.
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(338,37): error TS2339: Property 'profilerAgent' does not exist on type 'Target'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(339,14): error TS2339: Property 'RuntimeAgent' does not exist on type 'typeof TestRunner'.
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(339,36): error TS2339: Property 'runtimeAgent' does not exist on type 'Target'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(340,14): error TS2339: Property 'TargetAgent' does not exist on type 'typeof TestRunner'.
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(340,35): error TS2339: Property 'targetAgent' does not exist on type 'Target'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(342,14): error TS2339: Property 'networkManager' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(343,14): error TS2339: Property 'securityOriginManager' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(344,14): error TS2339: Property 'resourceTreeModel' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(345,14): error TS2339: Property 'debuggerModel' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(346,14): error TS2339: Property 'runtimeModel' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(347,14): error TS2339: Property 'domModel' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(348,14): error TS2339: Property 'domDebuggerModel' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(349,14): error TS2339: Property 'cssModel' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(350,14): error TS2339: Property 'cpuProfilerModel' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(351,14): error TS2339: Property 'overlayModel' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(352,14): error TS2339: Property 'serviceWorkerManager' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(353,14): error TS2339: Property 'tracingManager' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(354,14): error TS2339: Property 'mainTarget' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(363,21): error TS2339: Property 'runtimeModel' does not exist on type 'typeof TestRunner'.
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(363,62): error TS2339: Property 'result' does not exist on type '{ response: RemoteObject; }'.
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(372,42): error TS2339: Property 'result' does not exist on type '{ response: RemoteObject; }'.
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(372,65): error TS2339: Property 'exceptionDetails' does not exist on type '{ response: RemoteObject; }'.
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(381,2): error TS1131: Property or signature expected.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(398,35): error TS2339: Property 'RuntimeAgent' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(399,33): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(415,35): error TS2339: Property 'RuntimeAgent' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(416,26): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(437,35): error TS2339: Property 'RuntimeAgent' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(440,33): error TS2339: Property 'Error' does not exist on type 'typeof Protocol'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(473,32): error TS2339: Property 'runtimeModel' does not exist on type 'typeof TestRunner'.
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(503,30): error TS2345: Argument of type 'Function' is not assignable to parameter of type '(value: [any, any, any, any, any, any, any, any, any, any]) => [any, any, any, any, any, any, any...'.
   Type 'Function' provides no match for the signature '(value: [any, any, any, any, any, any, any, any, any, any]): [any, any, any, any, any, any, any, any, any, any] | PromiseLike<[any, any, any, any, any, any, any, any, any, any]>'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(624,20): error TS2339: Property 'RuntimeAgent' does not exist on type 'typeof TestRunner'.
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(641,59): error TS2339: Property 'testRunner' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(641,92): error TS2339: Property 'testRunner' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(642,3): error TS2322: Type '1' is not assignable to type 'boolean'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(652,37): error TS2339: Property 'runtimeModel' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(653,14): error TS2339: Property 'RuntimeAgent' does not exist on type 'typeof TestRunner'.
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(683,28): error TS2363: The right-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(712,2): error TS1003: Identifier expected.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(713,12): error TS2339: Property 'CustomFormatters' does not exist on type 'typeof TestRunner'.
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(717,24): error TS2694: Namespace 'TestRunner' has no exported member 'CustomFormatters'.
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(748,24): error TS2694: Namespace 'TestRunner' has no exported member 'CustomFormatters'.
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(777,22): error TS2339: Property 'attributes' does not exist on type 'Node'.
@@ -13116,24 +12527,9 @@ node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(812,24
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(839,78): error TS2339: Property 'deepTextContent' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(842,43): error TS2339: Property 'property' does not exist on type 'TreeElement'.
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(863,24): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(936,14): error TS2339: Property '_pageLoadedCallback' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(937,14): error TS2339: Property 'resourceTreeModel' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(951,14): error TS2339: Property 'resourceTreeModel' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(990,14): error TS2339: Property '_pageLoadedCallback' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(991,14): error TS2339: Property 'resourceTreeModel' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(992,14): error TS2339: Property 'resourceTreeModel' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(996,14): error TS2339: Property 'resourceTreeModel' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(1002,18): error TS2339: Property '_pageLoadedCallback' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(1003,31): error TS2339: Property '_pageLoadedCallback' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(1004,23): error TS2339: Property '_pageLoadedCallback' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(1013,14): error TS2339: Property 'resourceTreeModel' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(1016,16): error TS2339: Property 'resourceTreeModel' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(1025,32): error TS2339: Property '_pageLoadedCallback' does not exist on type 'typeof TestRunner'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(1031,14): error TS2339: Property '_pageLoadedCallback' does not exist on type 'typeof TestRunner'.
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(1035,18): error TS1099: Type argument list cannot be empty.
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(1035,19): error TS1005: '>' expected.
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(1035,19): error TS8024: JSDoc '@param' tag has name 'function', but there is no parameter with that name.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(1129,21): error TS2339: Property 'resourceTreeModel' does not exist on type 'typeof TestRunner'.
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(1192,15): error TS2339: Property 'runtime' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(1203,19): error TS2339: Property 'naturalOrderComparator' does not exist on type 'StringConstructor'.
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(1249,23): error TS2694: Namespace 'Workspace' has no exported member 'projectTypes'.
@@ -13144,14 +12540,13 @@ node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(1304,3
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(1310,30): error TS2339: Property 'getAttribute' does not exist on type 'Node & ChildNode'.
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(1311,44): error TS2339: Property 'getAttribute' does not exist on type 'Node & ChildNode'.
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(1388,16): error TS2339: Property 'testRunner' does not exist on type 'Window'.
-node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(1424,14): error TS2339: Property '_initializeTargetForStartupTest' does not exist on type 'typeof TestRunner'.
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(1425,37): error TS2339: Property '_instanceForTest' does not exist on type 'typeof Main'.
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(1426,27): error TS2339: Property '_instanceForTest' does not exist on type 'typeof Main'.
 node_modules/chrome-devtools-frontend/front_end/test_runner/TestRunner.js(1427,48): error TS2339: Property '_instanceForTest' does not exist on type 'typeof Main'.
-node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(36,29): error TS2694: Namespace 'TextEditor' has no exported member 'Options'.
+node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(36,29): error TS2694: Namespace 'UI.TextEditor' has no exported member 'Options'.
 node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(47,35): error TS2339: Property 'CodeMirror' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(165,18): error TS2339: Property 'style' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(169,67): error TS2694: Namespace 'CodeMirrorTextEditor' has no exported member 'Decoration'.
+node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(169,67): error TS2694: Namespace 'TextEditor.CodeMirrorTextEditor' has no exported member 'Decoration'.
 node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(198,45): error TS2339: Property '_codeMirrorTextEditor' does not exist on type 'CodeMirror'.
 node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(207,16): error TS2339: Property '_codeMirrorTextEditor' does not exist on type 'CodeMirror'.
 node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(214,16): error TS2339: Property '_codeMirrorTextEditor' does not exist on type 'CodeMirror'.
@@ -13163,19 +12558,19 @@ node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor
 node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(270,27): error TS2339: Property 'runtime' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(356,16): error TS2339: Property 'addKeyMap' does not exist on type 'CodeMirror'.
 node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(395,29): error TS2339: Property 'constrain' does not exist on type 'NumberConstructor'.
-node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(425,21): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
-node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(425,71): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
-node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(426,21): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
-node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(426,72): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
-node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(438,21): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
-node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(438,71): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
-node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(439,21): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
-node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(439,72): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(425,31): error TS2339: Property 'isWordChar' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(425,81): error TS2339: Property 'isWordChar' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(426,31): error TS2339: Property 'isUpperCase' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(426,82): error TS2339: Property 'isLowerCase' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(438,31): error TS2339: Property 'isWordChar' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(438,81): error TS2339: Property 'isWordChar' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(439,31): error TS2339: Property 'isUpperCase' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(439,82): error TS2339: Property 'isLowerCase' does not exist on type 'typeof TextUtils'.
 node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(449,60): error TS2339: Property 'constrain' does not exist on type 'NumberConstructor'.
-node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(461,51): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
-node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(466,19): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
-node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(467,53): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
-node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(476,22): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(461,61): error TS2339: Property 'isSpaceChar' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(466,29): error TS2339: Property 'isStopChar' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(467,63): error TS2339: Property 'isStopChar' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(476,32): error TS2339: Property 'isWordChar' does not exist on type 'typeof TextUtils'.
 node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(557,9): error TS2339: Property 'consume' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(565,9): error TS2339: Property 'consume' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(570,18): error TS2694: Namespace 'UI' has no exported member 'AutocompleteConfig'.
@@ -13184,9 +12579,10 @@ node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor
 node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(855,13): error TS2339: Property 'style' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(856,13): error TS2339: Property 'style' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(863,23): error TS2339: Property 'get' does not exist on type 'Multimap'.
-node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(866,49): error TS2694: Namespace 'CodeMirrorTextEditor' has no exported member 'Decoration'.
+node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(866,49): error TS2694: Namespace 'TextEditor.CodeMirrorTextEditor' has no exported member 'Decoration'.
 node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(879,23): error TS2339: Property 'get' does not exist on type 'Multimap'.
-node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(883,49): error TS2694: Namespace 'CodeMirrorTextEditor' has no exported member 'Decoration'.
+node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(883,49): error TS2694: Namespace 'TextEditor.CodeMirrorTextEditor' has no exported member 'Decoration'.
+node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(889,25): error TS2339: Property 'delete' does not exist on type 'Multimap'.
 node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(899,25): error TS2339: Property 'constrain' does not exist on type 'NumberConstructor'.
 node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(902,27): error TS2339: Property 'constrain' does not exist on type 'NumberConstructor'.
 node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(955,5): error TS2322: Type 'string' is not assignable to type 'number'.
@@ -13214,8 +12610,8 @@ node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor
 node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(1392,35): error TS2339: Property 'getLineHandle' does not exist on type 'CodeMirror'.
 node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(1401,58): error TS2339: Property 'getLineNumber' does not exist on type 'CodeMirror'.
 node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(1451,22): error TS2339: Property 'execCommand' does not exist on type 'CodeMirror'.
-node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(1494,86): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
-node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(1497,80): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(1494,96): error TS2339: Property 'isWordChar' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(1497,90): error TS2339: Property 'isWordChar' does not exist on type 'typeof TextUtils'.
 node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(1539,44): error TS2339: Property 'getLine' does not exist on type 'CodeMirror'.
 node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(1543,22): error TS2339: Property 'eachLine' does not exist on type 'CodeMirror'.
 node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(1543,69): error TS2339: Property 'lineCount' does not exist on type 'CodeMirror'.
@@ -13230,13 +12626,13 @@ node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor
 node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(1637,71): error TS2339: Property 'ch' does not exist on type 'void'.
 node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(1645,2): error TS1131: Property or signature expected.
 node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(1650,33): error TS2339: Property 'Decoration' does not exist on type 'typeof CodeMirrorTextEditor'.
-node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(1659,29): error TS2694: Namespace 'TextEditor' has no exported member 'Options'.
+node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorTextEditor.js(1659,29): error TS2694: Namespace 'UI.TextEditor' has no exported member 'Options'.
 node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorUtils.js(53,24): error TS2694: Namespace 'CodeMirror' has no exported member 'ChangeObject'.
 node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorUtils.js(80,14): error TS2339: Property 'eachLine' does not exist on type 'CodeMirror'.
-node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorUtils.js(98,47): error TS2339: Property 'getSelectionBackgroundColor' does not exist on type 'typeof InspectorFrontendHost'.
-node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorUtils.js(99,47): error TS2339: Property 'getSelectionForegroundColor' does not exist on type 'typeof InspectorFrontendHost'.
-node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorUtils.js(100,55): error TS2339: Property 'getInactiveSelectionBackgroundColor' does not exist on type 'typeof InspectorFrontendHost'.
-node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorUtils.js(101,55): error TS2339: Property 'getInactiveSelectionForegroundColor' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorUtils.js(98,47): error TS2339: Property 'getSelectionBackgroundColor' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorUtils.js(99,47): error TS2339: Property 'getSelectionForegroundColor' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorUtils.js(100,55): error TS2339: Property 'getInactiveSelectionBackgroundColor' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorUtils.js(101,55): error TS2339: Property 'getInactiveSelectionForegroundColor' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorUtils.js(139,32): error TS1138: Parameter declaration expected.
 node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorUtils.js(147,26): error TS2339: Property 'token' does not exist on type 'void'.
 node_modules/chrome-devtools-frontend/front_end/text_editor/CodeMirrorUtils.js(149,67): error TS2339: Property 'length' does not exist on type 'void'.
@@ -13256,18 +12652,20 @@ node_modules/chrome-devtools-frontend/front_end/text_editor/TextEditorAutocomple
 node_modules/chrome-devtools-frontend/front_end/text_editor/TextEditorAutocompleteController.js(55,24): error TS2339: Property 'off' does not exist on type 'CodeMirror'.
 node_modules/chrome-devtools-frontend/front_end/text_editor/TextEditorAutocompleteController.js(62,26): error TS2694: Namespace 'CodeMirror' has no exported member 'BeforeChangeObject'.
 node_modules/chrome-devtools-frontend/front_end/text_editor/TextEditorAutocompleteController.js(67,48): error TS2339: Property 'getLine' does not exist on type 'CodeMirror'.
-node_modules/chrome-devtools-frontend/front_end/text_editor/TextEditorAutocompleteController.js(74,15): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
-node_modules/chrome-devtools-frontend/front_end/text_editor/TextEditorAutocompleteController.js(91,15): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
-node_modules/chrome-devtools-frontend/front_end/text_editor/TextEditorAutocompleteController.js(113,40): error TS2694: Namespace 'SuggestBox' has no exported member 'Suggestions'.
+node_modules/chrome-devtools-frontend/front_end/text_editor/TextEditorAutocompleteController.js(74,25): error TS2339: Property 'textToWords' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/text_editor/TextEditorAutocompleteController.js(91,25): error TS2339: Property 'textToWords' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/text_editor/TextEditorAutocompleteController.js(113,40): error TS2694: Namespace 'UI.SuggestBox' has no exported member 'Suggestions'.
 node_modules/chrome-devtools-frontend/front_end/text_editor/TextEditorAutocompleteController.js(135,34): error TS2694: Namespace 'CodeMirror' has no exported member 'ChangeObject'.
 node_modules/chrome-devtools-frontend/front_end/text_editor/TextEditorAutocompleteController.js(151,47): error TS2339: Property 'getLine' does not exist on type 'CodeMirror'.
 node_modules/chrome-devtools-frontend/front_end/text_editor/TextEditorAutocompleteController.js(159,35): error TS2339: Property 'getCursor' does not exist on type 'CodeMirror'.
 node_modules/chrome-devtools-frontend/front_end/text_editor/TextEditorAutocompleteController.js(198,39): error TS2339: Property 'listSelections' does not exist on type 'CodeMirror'.
 node_modules/chrome-devtools-frontend/front_end/text_editor/TextEditorAutocompleteController.js(218,26): error TS2339: Property 'somethingSelected' does not exist on type 'CodeMirror'.
 node_modules/chrome-devtools-frontend/front_end/text_editor/TextEditorAutocompleteController.js(223,35): error TS2339: Property 'getCursor' does not exist on type 'CodeMirror'.
-node_modules/chrome-devtools-frontend/front_end/text_editor/TextEditorAutocompleteController.js(239,31): error TS2694: Namespace 'SuggestBox' has no exported member 'Suggestions'.
+node_modules/chrome-devtools-frontend/front_end/text_editor/TextEditorAutocompleteController.js(239,31): error TS2694: Namespace 'UI.SuggestBox' has no exported member 'Suggestions'.
+node_modules/chrome-devtools-frontend/front_end/text_editor/TextEditorAutocompleteController.js(250,46): error TS2345: Argument of type 'TextEditorAutocompleteController' is not assignable to parameter of type '{ [x: string]: any; applySuggestion(suggestion: string, isIntermediateSuggestion?: boolean): void...'.
+  Property '_textEditor' does not exist on type '{ [x: string]: any; applySuggestion(suggestion: string, isIntermediateSuggestion?: boolean): void...'.
 node_modules/chrome-devtools-frontend/front_end/text_editor/TextEditorAutocompleteController.js(275,35): error TS2339: Property 'getCursor' does not exist on type 'CodeMirror'.
-node_modules/chrome-devtools-frontend/front_end/text_editor/TextEditorAutocompleteController.js(303,29): error TS2694: Namespace 'SuggestBox' has no exported member 'Suggestions'.
+node_modules/chrome-devtools-frontend/front_end/text_editor/TextEditorAutocompleteController.js(303,29): error TS2694: Namespace 'UI.SuggestBox' has no exported member 'Suggestions'.
 node_modules/chrome-devtools-frontend/front_end/text_editor/TextEditorAutocompleteController.js(329,19): error TS2339: Property 'keyCode' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/text_editor/TextEditorAutocompleteController.js(359,35): error TS2339: Property 'getCursor' does not exist on type 'CodeMirror'.
 node_modules/chrome-devtools-frontend/front_end/text_editor/TextEditorAutocompleteController.js(360,43): error TS2339: Property 'getLine' does not exist on type 'CodeMirror'.
@@ -13280,36 +12678,34 @@ node_modules/chrome-devtools-frontend/front_end/text_editor/TextEditorAutocomple
 node_modules/chrome-devtools-frontend/front_end/text_editor/TextEditorAutocompleteController.js(404,35): error TS2339: Property 'getCursor' does not exist on type 'CodeMirror'.
 node_modules/chrome-devtools-frontend/front_end/text_editor/TextEditorAutocompleteController.js(410,35): error TS2339: Property 'getLine' does not exist on type 'CodeMirror'.
 node_modules/chrome-devtools-frontend/front_end/text_utils/Text.js(21,39): error TS2339: Property 'computeLineEndings' does not exist on type 'string'.
-node_modules/chrome-devtools-frontend/front_end/text_utils/Text.js(51,31): error TS2694: Namespace 'Text' has no exported member 'Position'.
+node_modules/chrome-devtools-frontend/front_end/text_utils/Text.js(51,31): error TS2694: Namespace 'TextUtils.Text' has no exported member 'Position'.
 node_modules/chrome-devtools-frontend/front_end/text_utils/Text.js(55,34): error TS2339: Property 'lowerBound' does not exist on type 'number[]'.
-node_modules/chrome-devtools-frontend/front_end/text_utils/Text.js(121,59): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/text_utils/Text.js(122,16): error TS2300: Duplicate identifier 'Position'.
 node_modules/chrome-devtools-frontend/front_end/text_utils/Text.js(122,16): error TS2339: Property 'Position' does not exist on type 'typeof Text'.
 node_modules/chrome-devtools-frontend/front_end/text_utils/Text.js(160,42): error TS2339: Property 'lowerBound' does not exist on type 'number[]'.
 node_modules/chrome-devtools-frontend/front_end/text_utils/TextRange.js(84,31): error TS2339: Property 'computeLineEndings' does not exist on type 'string'.
-node_modules/chrome-devtools-frontend/front_end/text_utils/TextUtils.js(30,11): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
-node_modules/chrome-devtools-frontend/front_end/text_utils/TextUtils.js(45,23): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
-node_modules/chrome-devtools-frontend/front_end/text_utils/TextUtils.js(45,64): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
-node_modules/chrome-devtools-frontend/front_end/text_utils/TextUtils.js(53,22): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
-node_modules/chrome-devtools-frontend/front_end/text_utils/TextUtils.js(62,22): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
-node_modules/chrome-devtools-frontend/front_end/text_utils/TextUtils.js(89,22): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
-node_modules/chrome-devtools-frontend/front_end/text_utils/TextUtils.js(89,70): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
-node_modules/chrome-devtools-frontend/front_end/text_utils/TextUtils.js(118,51): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
-node_modules/chrome-devtools-frontend/front_end/text_utils/TextUtils.js(201,38): error TS2694: Namespace 'FilterParser' has no exported member 'ParsedFilter'.
-node_modules/chrome-devtools-frontend/front_end/text_utils/TextUtils.js(202,39): error TS2694: Namespace 'FilterParser' has no exported member 'ParsedFilter'.
-node_modules/chrome-devtools-frontend/front_end/text_utils/TextUtils.js(210,46): error TS2694: Namespace 'FilterParser' has no exported member 'ParsedFilter'.
-node_modules/chrome-devtools-frontend/front_end/text_utils/TextUtils.js(213,33): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
-node_modules/chrome-devtools-frontend/front_end/text_utils/TextUtils.js(214,17): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
-node_modules/chrome-devtools-frontend/front_end/text_utils/TextUtils.js(214,59): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
-node_modules/chrome-devtools-frontend/front_end/text_utils/TextUtils.js(215,17): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
-node_modules/chrome-devtools-frontend/front_end/text_utils/TextUtils.js(242,112): error TS1003: Identifier expected.
+node_modules/chrome-devtools-frontend/front_end/text_utils/TextUtils.js(35,3): error TS2322: Type '{ isStopChar: (char: string) => boolean; isWordChar: (char: string) => boolean; isSpaceChar: (cha...' is not assignable to type 'typeof TextUtils'.
+  Object literal may only specify known properties, and 'isStopChar' does not exist in type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/text_utils/TextUtils.js(45,33): error TS2339: Property 'isStopChar' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/text_utils/TextUtils.js(45,74): error TS2339: Property 'isSpaceChar' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/text_utils/TextUtils.js(53,32): error TS2339: Property '_SpaceCharRegex' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/text_utils/TextUtils.js(62,32): error TS2339: Property 'isWordChar' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/text_utils/TextUtils.js(89,32): error TS2339: Property 'isOpeningBraceChar' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/text_utils/TextUtils.js(89,80): error TS2339: Property 'isClosingBraceChar' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/text_utils/TextUtils.js(118,61): error TS2339: Property 'isSpaceChar' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/text_utils/TextUtils.js(201,38): error TS2694: Namespace 'TextUtils.FilterParser' has no exported member 'ParsedFilter'.
+node_modules/chrome-devtools-frontend/front_end/text_utils/TextUtils.js(202,39): error TS2694: Namespace 'TextUtils.FilterParser' has no exported member 'ParsedFilter'.
+node_modules/chrome-devtools-frontend/front_end/text_utils/TextUtils.js(210,46): error TS2694: Namespace 'TextUtils.FilterParser' has no exported member 'ParsedFilter'.
+node_modules/chrome-devtools-frontend/front_end/text_utils/TextUtils.js(213,43): error TS2339: Property 'splitStringByRegexes' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/text_utils/TextUtils.js(214,27): error TS2339: Property '_keyValueFilterRegex' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/text_utils/TextUtils.js(214,69): error TS2339: Property '_regexFilterRegex' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/text_utils/TextUtils.js(215,27): error TS2339: Property '_textFilterRegex' does not exist on type 'typeof TextUtils'.
 node_modules/chrome-devtools-frontend/front_end/text_utils/TextUtils.js(243,24): error TS2339: Property 'ParsedFilter' does not exist on type 'typeof FilterParser'.
-node_modules/chrome-devtools-frontend/front_end/text_utils/TextUtils.js(245,11): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
-node_modules/chrome-devtools-frontend/front_end/text_utils/TextUtils.js(246,11): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
-node_modules/chrome-devtools-frontend/front_end/text_utils/TextUtils.js(247,11): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
-node_modules/chrome-devtools-frontend/front_end/text_utils/TextUtils.js(248,11): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
-node_modules/chrome-devtools-frontend/front_end/text_utils/TextUtils.js(253,11): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
-node_modules/chrome-devtools-frontend/front_end/text_utils/TextUtils.js(263,11): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/text_utils/TextUtils.js(245,21): error TS2339: Property '_keyValueFilterRegex' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/text_utils/TextUtils.js(246,21): error TS2339: Property '_regexFilterRegex' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/text_utils/TextUtils.js(247,21): error TS2339: Property '_textFilterRegex' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/text_utils/TextUtils.js(248,21): error TS2339: Property '_SpaceCharRegex' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/text_utils/TextUtils.js(253,21): error TS2339: Property 'Indent' does not exist on type 'typeof TextUtils'.
 node_modules/chrome-devtools-frontend/front_end/text_utils/TextUtils.js(340,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 node_modules/chrome-devtools-frontend/front_end/text_utils/TextUtils.js(340,32): error TS1138: Parameter declaration expected.
 node_modules/chrome-devtools-frontend/front_end/timeline/CountersGraph.js(59,42): error TS2339: Property 'createChild' does not exist on type 'Element'.
@@ -13330,6 +12726,8 @@ node_modules/chrome-devtools-frontend/front_end/timeline/CountersGraph.js(195,19
 node_modules/chrome-devtools-frontend/front_end/timeline/CountersGraph.js(195,45): error TS2339: Property 'totalOffsetLeft' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/timeline/CountersGraph.js(230,19): error TS2339: Property 'x' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/timeline/CountersGraph.js(230,45): error TS2339: Property 'totalOffsetLeft' does not exist on type 'Element'.
+node_modules/chrome-devtools-frontend/front_end/timeline/CountersGraph.js(243,39): error TS2345: Argument of type 'Calculator' is not assignable to parameter of type '{ [x: string]: any; computePosition(time: number): number; formatValue(time: number, precision?: ...'.
+  Property 'setZeroTime' does not exist on type '{ [x: string]: any; computePosition(time: number): number; formatValue(time: number, precision?: ...'.
 node_modules/chrome-devtools-frontend/front_end/timeline/CountersGraph.js(282,43): error TS2339: Property 'peekLast' does not exist on type 'any[]'.
 node_modules/chrome-devtools-frontend/front_end/timeline/CountersGraph.js(331,33): error TS2339: Property 'constrain' does not exist on type 'NumberConstructor'.
 node_modules/chrome-devtools-frontend/front_end/timeline/CountersGraph.js(331,54): error TS2339: Property 'upperBound' does not exist on type 'any[]'.
@@ -13350,7 +12748,7 @@ node_modules/chrome-devtools-frontend/front_end/timeline/CountersGraph.js(563,19
 node_modules/chrome-devtools-frontend/front_end/timeline/EventsTimelineTreeView.js(22,54): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Ascending: string; Descending: string; }'.
 node_modules/chrome-devtools-frontend/front_end/timeline/EventsTimelineTreeView.js(33,9): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; Frame: string; NetworkRequest: string; TraceEvent: string; Range: string; }' and 'string'.
 node_modules/chrome-devtools-frontend/front_end/timeline/EventsTimelineTreeView.js(63,32): error TS2339: Property 'peekLast' does not exist on type 'IterableIterator<Node>[]'.
-node_modules/chrome-devtools-frontend/front_end/timeline/EventsTimelineTreeView.js(91,40): error TS2694: Namespace 'DataGrid' has no exported member 'ColumnDescriptor'.
+node_modules/chrome-devtools-frontend/front_end/timeline/EventsTimelineTreeView.js(91,40): error TS2694: Namespace 'DataGrid.DataGrid' has no exported member 'ColumnDescriptor'.
 node_modules/chrome-devtools-frontend/front_end/timeline/EventsTimelineTreeView.js(95,34): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/timeline/EventsTimelineTreeView.js(158,73): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/timeline/EventsTimelineTreeView.js(160,24): error TS2555: Expected at least 2 arguments, but got 1.
@@ -13360,6 +12758,12 @@ node_modules/chrome-devtools-frontend/front_end/timeline/EventsTimelineTreeView.
   Type 'ToolbarCheckbox' is not assignable to type '{ [x: string]: any; item(): any & any; }'.
     Property 'item' is missing in type 'ToolbarCheckbox'.
 node_modules/chrome-devtools-frontend/front_end/timeline/EventsTimelineTreeView.js(183,56): error TS2339: Property 'value' does not exist on type 'Element'.
+node_modules/chrome-devtools-frontend/front_end/timeline/ExtensionTracingSession.js(62,46): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; loadingStarted(): void; loadingProgress(progress?: number): void; processingS...'.
+  Type 'ExtensionTracingSession' is not assignable to type '{ [x: string]: any; loadingStarted(): void; loadingProgress(progress?: number): void; processingS...'.
+    Property '_provider' does not exist on type '{ [x: string]: any; loadingStarted(): void; loadingProgress(progress?: number): void; processingS...'.
+node_modules/chrome-devtools-frontend/front_end/timeline/ExtensionTracingSession.js(66,26): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; complete: (url: string, timeOffsetMicroseconds: number) => void; }'.
+  Type 'ExtensionTracingSession' is not assignable to type '{ [x: string]: any; complete: (url: string, timeOffsetMicroseconds: number) => void; }'.
+    Property '_provider' does not exist on type '{ [x: string]: any; complete: (url: string, timeOffsetMicroseconds: number) => void; }'.
 node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceModel.js(57,51): error TS2345: Argument of type 'symbol' is not assignable to parameter of type '{ [x: string]: any; animation: symbol; console: symbol; userTiming: symbol; input: symbol; }'.
 node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceModel.js(57,89): error TS2345: Argument of type 'symbol' is not assignable to parameter of type '{ [x: string]: any; animation: symbol; console: symbol; userTiming: symbol; input: symbol; }'.
 node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceModel.js(157,25): error TS2304: Cannot find name 'FileError'.
@@ -13367,10 +12771,12 @@ node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(2
 node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(26,46): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(28,25): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(29,9): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(32,58): error TS2694: Namespace 'PerformanceMonitor' has no exported member 'MetricMode'.
-node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(33,5): error TS2322: Type 'Map<string, symbol>' is not assignable to type 'Map<string, { [x: string]: any; CumulativeTime: symbol; CumulativeCount: symbol; }>'.
+node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(32,58): error TS2694: Namespace 'Timeline.PerformanceMonitor' has no exported member 'MetricMode'.
 node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(33,5): error TS2322: Type 'Map<string, symbol>' is not assignable to type 'Map<string, { [x: string]: any; CumulativeTime: symbol; CumulativeCount: symbol; }>'.
   Type 'symbol' is not assignable to type '{ [x: string]: any; CumulativeTime: symbol; CumulativeCount: symbol; }'.
+node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(33,5): error TS2322: Type 'Map<string, symbol>' is not assignable to type 'Map<string, { [x: string]: any; CumulativeTime: symbol; CumulativeCount: symbol; }>'.
+node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(83,12): error TS2339: Property '_animationId' does not exist on type 'PerformanceMonitor'.
+node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(83,47): error TS2339: Property 'window' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(89,25): error TS2339: Property 'window' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(89,60): error TS2339: Property '_animationId' does not exist on type 'PerformanceMonitor'.
 node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(99,31): error TS2694: Namespace 'Protocol' has no exported member 'Performance'.
@@ -13381,14 +12787,14 @@ node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(1
 node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(119,14): error TS2678: Type 'symbol' is not comparable to type '{ [x: string]: any; CumulativeTime: symbol; CumulativeCount: symbol; }'.
 node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(163,75): error TS2345: Argument of type 'number' is not assignable to parameter of type '{ [x: string]: any; Unknown: number; Foreground: number; Background: number; Selection: number; }'.
 node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(165,74): error TS2345: Argument of type 'number' is not assignable to parameter of type '{ [x: string]: any; Unknown: number; Foreground: number; Background: number; Selection: number; }'.
-node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(183,43): error TS2694: Namespace 'PerformanceMonitor' has no exported member 'ChartInfo'.
+node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(183,43): error TS2694: Namespace 'Timeline.PerformanceMonitor' has no exported member 'ChartInfo'.
 node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(204,68): error TS2345: Argument of type 'number' is not assignable to parameter of type '{ [x: string]: any; Unknown: number; Foreground: number; Background: number; Selection: number; }'.
-node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(220,43): error TS2694: Namespace 'PerformanceMonitor' has no exported member 'ChartInfo'.
-node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(253,43): error TS2694: Namespace 'PerformanceMonitor' has no exported member 'ChartInfo'.
+node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(220,43): error TS2694: Namespace 'Timeline.PerformanceMonitor' has no exported member 'ChartInfo'.
+node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(253,43): error TS2694: Namespace 'Timeline.PerformanceMonitor' has no exported member 'ChartInfo'.
 node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(265,74): error TS2345: Argument of type 'number' is not assignable to parameter of type '{ [x: string]: any; Unknown: number; Foreground: number; Background: number; Selection: number; }'.
 node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(282,76): error TS2345: Argument of type 'number' is not assignable to parameter of type '{ [x: string]: any; Unknown: number; Foreground: number; Background: number; Selection: number; }'.
-node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(294,43): error TS2694: Namespace 'PerformanceMonitor' has no exported member 'ChartInfo'.
-node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(295,43): error TS2694: Namespace 'PerformanceMonitor' has no exported member 'MetricInfo'.
+node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(294,43): error TS2694: Namespace 'Timeline.PerformanceMonitor' has no exported member 'ChartInfo'.
+node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(295,43): error TS2694: Namespace 'Timeline.PerformanceMonitor' has no exported member 'MetricInfo'.
 node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(320,41): error TS2339: Property 'peekLast' does not exist on type '{ timestamp: number; metrics: Map<string, number>; }[]'.
 node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(330,24): error TS2339: Property 'constrain' does not exist on type 'NumberConstructor'.
 node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(394,2): error TS1131: Property or signature expected.
@@ -13396,7 +12802,7 @@ node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(4
 node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(406,2): error TS1131: Property or signature expected.
 node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(411,29): error TS2339: Property 'MetricInfo' does not exist on type 'typeof PerformanceMonitor'.
 node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(419,27): error TS2339: Property 'createChild' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(427,52): error TS2694: Namespace 'PerformanceMonitor' has no exported member 'ChartInfo'.
+node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(427,52): error TS2694: Namespace 'Timeline.PerformanceMonitor' has no exported member 'ChartInfo'.
 node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(430,16): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(442,16): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(447,15): error TS2555: Expected at least 2 arguments, but got 1.
@@ -13406,18 +12812,21 @@ node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(4
 node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(451,15): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(452,15): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(456,69): error TS2345: Argument of type 'number' is not assignable to parameter of type '{ [x: string]: any; Unknown: number; Foreground: number; Background: number; Selection: number; }'.
-node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(484,51): error TS2694: Namespace 'PerformanceMonitor' has no exported member 'ChartInfo'.
-node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(517,43): error TS2694: Namespace 'PerformanceMonitor' has no exported member 'ChartInfo'.
+node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(484,51): error TS2694: Namespace 'Timeline.PerformanceMonitor' has no exported member 'ChartInfo'.
+node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(517,43): error TS2694: Namespace 'Timeline.PerformanceMonitor' has no exported member 'ChartInfo'.
 node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(526,27): error TS2339: Property 'createChild' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(539,43): error TS2694: Namespace 'PerformanceMonitor' has no exported member 'ChartInfo'.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelineController.js(39,43): error TS2694: Namespace 'TimelineController' has no exported member 'RecordingOptions'.
+node_modules/chrome-devtools-frontend/front_end/timeline/PerformanceMonitor.js(539,43): error TS2694: Namespace 'Timeline.PerformanceMonitor' has no exported member 'ChartInfo'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineController.js(22,47): error TS2345: Argument of type 'TempFileBackingStorage' is not assignable to parameter of type '{ [x: string]: any; appendString(string: string): void; appendAccessibleString(string: string): (...'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineController.js(39,43): error TS2694: Namespace 'Timeline.TimelineController' has no exported member 'RecordingOptions'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineController.js(44,64): error TS2339: Property 'traceProviders' does not exist on type 'typeof extensionServer'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineController.js(137,24): error TS2694: Namespace 'Protocol' has no exported member 'Profiler'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineController.js(141,27): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelineController.js(180,42): error TS2694: Namespace 'TracingManager' has no exported member 'EventPayload'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineController.js(176,74): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; traceEventsCollected(events: any[]): void; tracingComplete(): void; tracingBu...'.
+  Type 'TimelineController' is not assignable to type '{ [x: string]: any; traceEventsCollected(events: any[]): void; tracingComplete(): void; tracingBu...'.
+    Property '_tracingManager' does not exist on type '{ [x: string]: any; traceEventsCollected(events: any[]): void; tracingComplete(): void; tracingBu...'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineController.js(180,42): error TS2694: Namespace 'SDK.TracingManager' has no exported member 'EventPayload'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineController.js(209,24): error TS2694: Namespace 'Protocol' has no exported member 'Profiler'.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelineController.js(214,58): error TS2694: Namespace 'TracingManager' has no exported member 'EventPayload'.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelineController.js(233,96): error TS2339: Property 'peekLast' does not exist on type 'Event[]'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineController.js(214,58): error TS2694: Namespace 'SDK.TracingManager' has no exported member 'EventPayload'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineController.js(272,1): error TS8022: JSDoc '@extends' is not attached to a class.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineController.js(283,2): error TS1131: Property or signature expected.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineController.js(288,29): error TS2339: Property 'RecordingOptions' does not exist on type 'typeof TimelineController'.
@@ -13439,16 +12848,15 @@ node_modules/chrome-devtools-frontend/front_end/timeline/TimelineEventOverview.j
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineEventOverview.js(113,28): error TS2339: Property 'constrain' does not exist on type 'NumberConstructor'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineEventOverview.js(114,26): error TS2339: Property 'constrain' does not exist on type 'NumberConstructor'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineEventOverview.js(127,22): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelineEventOverview.js(145,31): error TS2339: Property 'Network' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineEventOverview.js(169,27): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineEventOverview.js(170,43): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineEventOverview.js(204,36): error TS2339: Property '_overviewIndex' does not exist on type 'TimelineCategory'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineEventOverview.js(246,68): error TS2339: Property 'peekLast' does not exist on type 'any[]'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineEventOverview.js(248,81): error TS2339: Property '_overviewIndex' does not exist on type 'TimelineCategory'.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelineEventOverview.js(384,7): error TS2322: Type 'Promise<new (width?: number, height?: number) => HTMLImageElement>' is not assignable to type 'Promise<HTMLImageElement>'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineEventOverview.js(384,7): error TS2322: Type 'Promise<new (width?: number, height?: number) => HTMLImageElement>' is not assignable to type 'Promise<HTMLImageElement>'.
   Type 'new (width?: number, height?: number) => HTMLImageElement' is not assignable to type 'HTMLImageElement'.
     Property 'align' is missing in type 'new (width?: number, height?: number) => HTMLImageElement'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineEventOverview.js(384,7): error TS2322: Type 'Promise<new (width?: number, height?: number) => HTMLImageElement>' is not assignable to type 'Promise<HTMLImageElement>'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineEventOverview.js(457,17): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineEventOverview.js(483,24): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineEventOverview.js(524,28): error TS2339: Property 'peekLast' does not exist on type 'TimelineFrame[]'.
@@ -13456,10 +12864,10 @@ node_modules/chrome-devtools-frontend/front_end/timeline/TimelineEventOverview.j
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineEventOverview.js(542,40): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineEventOverview.js(644,48): error TS2339: Property 'bytesToString' does not exist on type 'NumberConstructor'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineEventOverview.js(644,87): error TS2339: Property 'bytesToString' does not exist on type 'NumberConstructor'.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(60,36): error TS2694: Namespace 'FlameChart' has no exported member 'GroupStyle'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(60,36): error TS2694: Namespace 'PerfUI.FlameChart' has no exported member 'GroupStyle'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(67,55): error TS2345: Argument of type 'number' is not assignable to parameter of type '{ [x: string]: any; Unknown: number; Foreground: number; Background: number; Selection: number; }'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(68,66): error TS2345: Argument of type 'number' is not assignable to parameter of type '{ [x: string]: any; Unknown: number; Foreground: number; Background: number; Selection: number; }'.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(73,44): error TS2694: Namespace 'FlameChart' has no exported member 'GroupStyle'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(73,44): error TS2694: Namespace 'PerfUI.FlameChart' has no exported member 'GroupStyle'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(106,9): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; Frame: symbol; Event: symbol; InteractionRecord: symbol; ExtensionEvent: symb...' and 'symbol'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(108,11): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; Begin: string; End: string; Complete: string; Instant: string; AsyncBegin: st...' and 'string'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(108,67): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; Begin: string; End: string; Complete: string; Instant: string; AsyncBegin: st...' and 'string'.
@@ -13469,9 +12877,9 @@ node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataP
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(123,9): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; Frame: symbol; Event: symbol; InteractionRecord: symbol; ExtensionEvent: symb...' and 'symbol'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(140,27): error TS2339: Property '_blackboxRoot' does not exist on type 'Event | { [x: string]: any; Idle: string; Response: string; Scroll: string; Fling: string; Drag: ...'.
   Property '_blackboxRoot' does not exist on type 'Event'.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(155,133): error TS2694: Namespace 'TimelineIRModel' has no exported member 'Phases'.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(159,64): error TS2694: Namespace 'TimelineFlameChartDataProvider' has no exported member 'EntryType'.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(167,52): error TS2694: Namespace 'TimelineIRModel' has no exported member 'Phases'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(155,133): error TS2694: Namespace 'TimelineModel.TimelineIRModel' has no exported member 'Phases'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(159,64): error TS2694: Namespace 'Timeline.TimelineFlameChartDataProvider' has no exported member 'EntryType'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(167,52): error TS2694: Namespace 'TimelineModel.TimelineIRModel' has no exported member 'Phases'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(171,49): error TS2304: Cannot find name 'Image'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(203,24): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(209,66): error TS2345: Argument of type 'symbol' is not assignable to parameter of type '{ [x: string]: any; animation: symbol; console: symbol; userTiming: symbol; input: symbol; }'.
@@ -13486,12 +12894,12 @@ node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataP
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(239,13): error TS2345: Argument of type 'symbol' is not assignable to parameter of type '{ [x: string]: any; Frame: symbol; Event: symbol; InteractionRecord: symbol; ExtensionEvent: symb...'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(246,64): error TS2339: Property 'id' does not exist on type 'VirtualThread'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(285,11): error TS2365: Operator '!==' cannot be applied to types '{ [x: string]: any; Frame: symbol; Event: symbol; InteractionRecord: symbol; ExtensionEvent: symb...' and 'symbol'.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(312,39): error TS2694: Namespace 'FlameChart' has no exported member 'GroupStyle'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(312,39): error TS2694: Namespace 'PerfUI.FlameChart' has no exported member 'GroupStyle'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(313,9): error TS2345: Argument of type 'symbol' is not assignable to parameter of type '{ [x: string]: any; Frame: symbol; Event: symbol; InteractionRecord: symbol; ExtensionEvent: symb...'.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(320,48): error TS2694: Namespace 'TimelineModel' has no exported member 'AsyncEventGroup'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(320,48): error TS2694: Namespace 'TimelineModel.TimelineModel' has no exported member 'AsyncEventGroup'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(326,73): error TS2345: Argument of type 'symbol' is not assignable to parameter of type '{ [x: string]: any; Frame: symbol; Event: symbol; InteractionRecord: symbol; ExtensionEvent: symb...'.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(332,33): error TS2694: Namespace 'FlameChart' has no exported member 'GroupStyle'.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(333,55): error TS2694: Namespace 'TimelineFlameChartDataProvider' has no exported member 'EntryType'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(332,33): error TS2694: Namespace 'PerfUI.FlameChart' has no exported member 'GroupStyle'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(333,55): error TS2694: Namespace 'Timeline.TimelineFlameChartDataProvider' has no exported member 'EntryType'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(337,23): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; Frame: symbol; Event: symbol; InteractionRecord: symbol; ExtensionEvent: symb...' and 'symbol'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(350,41): error TS2345: Argument of type '{ [x: string]: any; Begin: string; End: string; Complete: string; Instant: string; AsyncBegin: st...' is not assignable to parameter of type 'string'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(351,27): error TS2365: Operator '!==' cannot be applied to types '{ [x: string]: any; Begin: string; End: string; Complete: string; Instant: string; AsyncBegin: st...' and 'string'.
@@ -13501,12 +12909,12 @@ node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataP
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(362,33): error TS2339: Property 'peekLast' does not exist on type 'Event[]'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(365,11): error TS2339: Property '_blackboxRoot' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(377,47): error TS2339: Property 'peekLast' does not exist on type 'Event[]'.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(410,48): error TS2694: Namespace 'TimelineModel' has no exported member 'AsyncEventGroup'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(410,48): error TS2694: Namespace 'TimelineModel.TimelineModel' has no exported member 'AsyncEventGroup'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(417,16): error TS2339: Property 'remove' does not exist on type 'any[]'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(418,16): error TS2339: Property 'remove' does not exist on type 'any[]'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(426,71): error TS2345: Argument of type 'symbol' is not assignable to parameter of type '{ [x: string]: any; Frame: symbol; Event: symbol; InteractionRecord: symbol; ExtensionEvent: symb...'.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(433,33): error TS2694: Namespace 'FlameChart' has no exported member 'GroupStyle'.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(434,55): error TS2694: Namespace 'TimelineFlameChartDataProvider' has no exported member 'EntryType'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(433,33): error TS2694: Namespace 'PerfUI.FlameChart' has no exported member 'GroupStyle'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(434,55): error TS2694: Namespace 'Timeline.TimelineFlameChartDataProvider' has no exported member 'EntryType'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(462,43): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(462,87): error TS2345: Argument of type 'symbol' is not assignable to parameter of type '{ [x: string]: any; Frame: symbol; Event: symbol; InteractionRecord: symbol; ExtensionEvent: symb...'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(468,5): error TS2322: Type 'symbol' is not assignable to type '{ [x: string]: any; Frame: symbol; Event: symbol; InteractionRecord: symbol; ExtensionEvent: symb...'.
@@ -13514,15 +12922,15 @@ node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataP
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(476,50): error TS2339: Property 'peekLast' does not exist on type 'any[]'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(478,5): error TS2322: Type 'symbol' is not assignable to type '{ [x: string]: any; Frame: symbol; Event: symbol; InteractionRecord: symbol; ExtensionEvent: symb...'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(488,5): error TS2322: Type 'symbol' is not assignable to type '{ [x: string]: any; Frame: symbol; Event: symbol; InteractionRecord: symbol; ExtensionEvent: symb...'.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(492,38): error TS2339: Property 'push' does not exist on type 'Uint16Array | number[]'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(492,38): error TS2339: Property 'push' does not exist on type 'number[] | Uint16Array'.
   Property 'push' does not exist on type 'Uint16Array'.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(493,42): error TS2339: Property 'push' does not exist on type 'Float64Array | number[]'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(493,42): error TS2339: Property 'push' does not exist on type 'number[] | Float64Array'.
   Property 'push' does not exist on type 'Float64Array'.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(495,44): error TS2339: Property 'push' does not exist on type 'Float32Array | number[]'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(495,44): error TS2339: Property 'push' does not exist on type 'number[] | Float32Array'.
   Property 'push' does not exist on type 'Float32Array'.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(499,42): error TS2339: Property 'push' does not exist on type 'Float32Array | number[]'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(499,42): error TS2339: Property 'push' does not exist on type 'number[] | Float32Array'.
   Property 'push' does not exist on type 'Float32Array'.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(505,56): error TS2694: Namespace 'TimelineFlameChartDataProvider' has no exported member 'EntryType'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(505,56): error TS2694: Namespace 'Timeline.TimelineFlameChartDataProvider' has no exported member 'EntryType'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(521,9): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; Frame: symbol; Event: symbol; InteractionRecord: symbol; ExtensionEvent: symb...' and 'symbol'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(529,40): error TS2339: Property 'millisToString' does not exist on type 'NumberConstructor'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(529,80): error TS2339: Property 'millisToString' does not exist on type 'NumberConstructor'.
@@ -13547,14 +12955,14 @@ node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataP
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(684,9): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; Frame: symbol; Event: symbol; InteractionRecord: symbol; ExtensionEvent: symb...' and 'symbol'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(689,9): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; Frame: symbol; Event: symbol; InteractionRecord: symbol; ExtensionEvent: symb...' and 'symbol'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(694,9): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; Frame: symbol; Event: symbol; InteractionRecord: symbol; ExtensionEvent: symb...' and 'symbol'.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(696,53): error TS2694: Namespace 'TimelineIRModel' has no exported member 'Phases'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(696,53): error TS2694: Namespace 'TimelineModel.TimelineIRModel' has no exported member 'Phases'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(704,9): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; Frame: symbol; Event: symbol; InteractionRecord: symbol; ExtensionEvent: symb...' and 'symbol'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(748,9): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; Frame: symbol; Event: symbol; InteractionRecord: symbol; ExtensionEvent: symb...' and 'symbol'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(750,9): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; Frame: symbol; Event: symbol; InteractionRecord: symbol; ExtensionEvent: symb...' and 'symbol'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(753,9): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; Frame: symbol; Event: symbol; InteractionRecord: symbol; ExtensionEvent: symb...' and 'symbol'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(781,93): error TS2345: Argument of type 'symbol' is not assignable to parameter of type '{ [x: string]: any; Frame: symbol; Event: symbol; InteractionRecord: symbol; ExtensionEvent: symb...'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(782,82): error TS2345: Argument of type 'symbol' is not assignable to parameter of type '{ [x: string]: any; Frame: symbol; Event: symbol; InteractionRecord: symbol; ExtensionEvent: symb...'.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(788,33): error TS2694: Namespace 'FlameChart' has no exported member 'GroupStyle'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(788,33): error TS2694: Namespace 'PerfUI.FlameChart' has no exported member 'GroupStyle'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(816,47): error TS2345: Argument of type '{ [x: string]: any; Begin: string; End: string; Complete: string; Instant: string; AsyncBegin: st...' is not assignable to parameter of type 'string'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(823,43): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; Begin: string; End: string; Complete: string; Instant: string; AsyncBegin: st...' and 'string'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(861,12): error TS2678: Type 'string' is not comparable to type '{ [x: string]: any; Begin: string; End: string; Complete: string; Instant: string; AsyncBegin: st...'.
@@ -13566,12 +12974,12 @@ node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataP
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(869,63): error TS2339: Property 'id' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(870,47): error TS2339: Property 'id' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(881,45): error TS2339: Property 'millisToString' does not exist on type 'NumberConstructor'.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(892,68): error TS2694: Namespace 'TimelineIRModel' has no exported member 'Phases'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(892,68): error TS2694: Namespace 'TimelineModel.TimelineIRModel' has no exported member 'Phases'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(906,9): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; Frame: symbol; Event: symbol; InteractionRecord: symbol; ExtensionEvent: symb...' and 'symbol'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(909,16): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; Frame: symbol; Event: symbol; InteractionRecord: symbol; ExtensionEvent: symb...' and 'symbol'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(925,19): error TS2339: Property 'preciseMillisToString' does not exist on type 'NumberConstructor'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(942,23): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; Frame: string; NetworkRequest: string; TraceEvent: string; Range: string; }' and 'string'.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(948,104): error TS2694: Namespace 'TimelineIRModel' has no exported member 'Phases'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(948,104): error TS2694: Namespace 'TimelineModel.TimelineIRModel' has no exported member 'Phases'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartDataProvider.js(1011,31): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; Frame: symbol; Event: symbol; InteractionRecord: symbol; ExtensionEvent: symb...' and 'symbol'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartNetworkDataProvider.js(17,53): error TS2345: Argument of type 'number' is not assignable to parameter of type '{ [x: string]: any; Unknown: number; Foreground: number; Background: number; Selection: number; }'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartNetworkDataProvider.js(19,64): error TS2345: Argument of type 'number' is not assignable to parameter of type '{ [x: string]: any; Unknown: number; Foreground: number; Background: number; Selection: number; }'.
@@ -13582,13 +12990,17 @@ node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartNetwo
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartNetworkDataProvider.js(306,25): error TS2339: Property 'createChild' does not exist on type 'DocumentFragment'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartNetworkDataProvider.js(309,87): error TS2339: Property 'millisToString' does not exist on type 'NumberConstructor'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartNetworkDataProvider.js(313,69): error TS2694: Namespace 'Protocol' has no exported member 'Network'.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartNetworkDataProvider.js(326,33): error TS2339: Property 'Network' does not exist on type 'typeof Protocol'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartNetworkDataProvider.js(360,56): error TS2339: Property 'peekLast' does not exist on type 'number[]'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartNetworkDataProvider.js(391,64): error TS2339: Property 'constrain' does not exist on type 'NumberConstructor'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartNetworkDataProvider.js(408,19): error TS2339: Property 'preciseMillisToString' does not exist on type 'NumberConstructor'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartView.js(35,50): error TS2345: Argument of type 'TimelineFlameChartDataProvider' is not assignable to parameter of type '{ [x: string]: any; minimumBoundary(): number; totalTime(): number; formatValue(value: number, pr...'.
+  Property '_font' does not exist on type '{ [x: string]: any; minimumBoundary(): number; totalTime(): number; formatValue(value: number, pr...'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartView.js(43,9): error TS2345: Argument of type 'TimelineFlameChartNetworkDataProvider' is not assignable to parameter of type '{ [x: string]: any; minimumBoundary(): number; totalTime(): number; formatValue(value: number, pr...'.
+  Property '_font' does not exist on type '{ [x: string]: any; minimumBoundary(): number; totalTime(): number; formatValue(value: number, pr...'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartView.js(49,52): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartView.js(184,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartView.js(282,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartView.js(286,69): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; minimumBoundary(): number; totalTime(): number; formatValue(value: number, pr...' and 'TimelineFlameChartDataProvider'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartView.js(434,24): error TS2694: Namespace 'Timeline' has no exported member 'TimelineMarkerStyle'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineFlameChartView.js(463,28): error TS2339: Property 'millisToString' does not exist on type 'NumberConstructor'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineHistoryManager.js(68,26): error TS2555: Expected at least 2 arguments, but got 1.
@@ -13605,8 +13017,7 @@ node_modules/chrome-devtools-frontend/front_end/timeline/TimelineHistoryManager.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineHistoryManager.js(225,15): error TS2339: Property 'style' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineHistoryManager.js(226,15): error TS2339: Property 'style' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineHistoryManager.js(227,28): error TS2339: Property 'createChild' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelineHistoryManager.js(248,48): error TS2694: Namespace 'TimelineHistoryManager' has no exported member 'PreviewData'.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelineHistoryManager.js(255,86): error TS1003: Identifier expected.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineHistoryManager.js(248,48): error TS2694: Namespace 'Timeline.TimelineHistoryManager' has no exported member 'PreviewData'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineHistoryManager.js(256,33): error TS2339: Property 'PreviewData' does not exist on type 'typeof TimelineHistoryManager'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineHistoryManager.js(271,37): error TS2345: Argument of type 'symbol' is not assignable to parameter of type '{ [x: string]: any; SetExactSize: symbol; SetExactWidthMaxHeight: symbol; MeasureContent: symbol; }'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineHistoryManager.js(273,46): error TS2345: Argument of type 'symbol' is not assignable to parameter of type '{ [x: string]: any; BlockedByGlassPane: symbol; PierceGlassPane: symbol; PierceContents: symbol; }'.
@@ -13614,10 +13025,7 @@ node_modules/chrome-devtools-frontend/front_end/timeline/TimelineHistoryManager.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineHistoryManager.js(278,37): error TS2339: Property 'createChild' does not exist on type 'DocumentFragment'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineHistoryManager.js(281,55): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; createElementForItem(item: T): Element; heightForItem(item: T): number; isIte...'.
   Type 'DropDown' is not assignable to type '{ [x: string]: any; createElementForItem(item: T): Element; heightForItem(item: T): number; isIte...'.
-    Types of property 'createElementForItem' are incompatible.
-      Type '(item: PerformanceModel) => Element' is not assignable to type '(item: T) => Element'.
-        Types of parameters 'item' and 'item' are incompatible.
-          Type 'T' is not assignable to type 'PerformanceModel'.
+    Property '_glassPane' does not exist on type '{ [x: string]: any; createElementForItem(item: T): Element; heightForItem(item: T): number; isIte...'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineHistoryManager.js(319,48): error TS2339: Property 'boxInWindow' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineHistoryManager.js(331,29): error TS2339: Property 'enclosingNodeOrSelfWithClass' does not exist on type 'EventTarget'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineHistoryManager.js(342,23): error TS2339: Property 'enclosingNodeOrSelfWithClass' does not exist on type 'EventTarget'.
@@ -13625,13 +13033,18 @@ node_modules/chrome-devtools-frontend/front_end/timeline/TimelineHistoryManager.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineHistoryManager.js(361,11): error TS2339: Property 'consume' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineHistoryManager.js(432,39): error TS2339: Property 'createChild' does not exist on type 'DocumentFragment'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineLayersView.js(66,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelineLoader.js(28,41): error TS2339: Property 'TextUtils' does not exist on type 'typeof TextUtils'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineLoader.js(17,47): error TS2345: Argument of type 'TempFileBackingStorage' is not assignable to parameter of type '{ [x: string]: any; appendString(string: string): void; appendAccessibleString(string: string): (...'.
+  Property '_file' does not exist on type '{ [x: string]: any; appendString(string: string): void; appendAccessibleString(string: string): (...'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineLoader.js(41,21): error TS2345: Argument of type 'TimelineLoader' is not assignable to parameter of type '{ [x: string]: any; write(data: string): Promise<any>; close(): void; }'.
+  Property '_client' does not exist on type '{ [x: string]: any; write(data: string): Promise<any>; close(): void; }'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineLoader.js(43,14): error TS2339: Property '_reportErrorAndCancelLoading' does not exist on type 'typeof TimelineLoader'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineLoader.js(45,5): error TS2322: Type 'TimelineLoader' is not assignable to type '{ [x: string]: any; loadingStarted(): void; loadingProgress(progress?: number): void; processingS...'.
   Type 'TimelineLoader' is not assignable to type '{ [x: string]: any; loadingStarted(): void; loadingProgress(progress?: number): void; processingS...'.
     Property 'loadingStarted' is missing in type 'TimelineLoader'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineLoader.js(45,5): error TS2322: Type 'TimelineLoader' is not assignable to type '{ [x: string]: any; loadingStarted(): void; loadingProgress(progress?: number): void; processingS...'.
   Type 'TimelineLoader' is not assignable to type '{ [x: string]: any; loadingStarted(): void; loadingProgress(progress?: number): void; processingS...'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineLoader.js(55,49): error TS2345: Argument of type 'TimelineLoader' is not assignable to parameter of type '{ [x: string]: any; write(data: string): Promise<any>; close(): void; }'.
+  Property '_client' does not exist on type '{ [x: string]: any; write(data: string): Promise<any>; close(): void; }'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineLoader.js(56,5): error TS2322: Type 'TimelineLoader' is not assignable to type '{ [x: string]: any; loadingStarted(): void; loadingProgress(progress?: number): void; processingS...'.
   Type 'TimelineLoader' is not assignable to type '{ [x: string]: any; loadingStarted(): void; loadingProgress(progress?: number): void; processingS...'.
     Property 'loadingStarted' is missing in type 'TimelineLoader'.
@@ -13639,7 +13052,7 @@ node_modules/chrome-devtools-frontend/front_end/timeline/TimelineLoader.js(56,5)
   Type 'TimelineLoader' is not assignable to type '{ [x: string]: any; loadingStarted(): void; loadingProgress(progress?: number): void; processingS...'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineLoader.js(91,43): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineLoader.js(118,41): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelineLoader.js(137,54): error TS2694: Namespace 'TracingManager' has no exported member 'EventPayload'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineLoader.js(137,54): error TS2694: Namespace 'SDK.TracingManager' has no exported member 'EventPayload'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineLoader.js(146,43): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineLoader.js(203,41): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePaintProfilerView.js(119,26): error TS2694: Namespace 'Protocol' has no exported member 'DOM'.
@@ -13652,10 +13065,13 @@ node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(87,43)
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(91,38): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(100,53): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(111,60): error TS2339: Property 'createChild' does not exist on type 'Element'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(118,60): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; requestWindowTimes(startTime: number, endTime: number): void; select(selectio...'.
+  Type 'TimelinePanel' is not assignable to type '{ [x: string]: any; requestWindowTimes(startTime: number, endTime: number): void; select(selectio...'.
+    Property '_dropTarget' does not exist on type '{ [x: string]: any; requestWindowTimes(startTime: number, endTime: number): void; select(selectio...'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(131,32): error TS2339: Property 'addEventListener' does not exist on type 'typeof extensionServer'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(140,57): error TS2339: Property 'runtime' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(168,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(192,38): error TS2694: Namespace 'TimelinePanel' has no exported member 'State'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(192,38): error TS2694: Namespace 'Timeline.TimelinePanel' has no exported member 'State'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(195,5): error TS2322: Type '{ [x: string]: any; Idle: symbol; StartPending: symbol; Recording: symbol; StopPending: symbol; L...' is not assignable to type 'symbol'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(206,42): error TS2345: Argument of type 'ToolbarSettingCheckbox' is not assignable to parameter of type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
   Type 'ToolbarSettingCheckbox' is not assignable to type '{ [x: string]: any; item(): any & any; }'.
@@ -13701,7 +13117,18 @@ node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(298,23
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(334,20): error TS2345: Argument of type 'symbol' is not assignable to parameter of type '{ [x: string]: any; Idle: symbol; StartPending: symbol; Recording: symbol; StopPending: symbol; L...'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(340,33): error TS2339: Property 'remove' does not exist on type 'Node'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(362,37): error TS2339: Property 'toISO8601Compact' does not exist on type 'Date'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(369,45): error TS2345: Argument of type 'FileOutputStream' is not assignable to parameter of type '{ [x: string]: any; write(data: string): Promise<any>; close(): void; }'.
+  Property 'open' does not exist on type '{ [x: string]: any; write(data: string): Promise<any>; close(): void; }'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(396,31): error TS2339: Property 'click' does not exist on type 'Node'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(406,63): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; loadingStarted(): void; loadingProgress(progress?: number): void; processingS...'.
+  Type 'TimelinePanel' is not assignable to type '{ [x: string]: any; loadingStarted(): void; loadingProgress(progress?: number): void; processingS...'.
+    Property '_dropTarget' does not exist on type '{ [x: string]: any; loadingStarted(): void; loadingProgress(progress?: number): void; processingS...'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(417,61): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; loadingStarted(): void; loadingProgress(progress?: number): void; processingS...'.
+  Type 'TimelinePanel' is not assignable to type '{ [x: string]: any; loadingStarted(): void; loadingProgress(progress?: number): void; processingS...'.
+    Property '_dropTarget' does not exist on type '{ [x: string]: any; loadingStarted(): void; loadingProgress(progress?: number): void; processingS...'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(434,44): error TS2345: Argument of type 'TimelineEventOverview[]' is not assignable to parameter of type '{ [x: string]: any; show(parentElement: Element, insertBefore?: Element): void; update(): void; d...'.
+  Type 'TimelineEventOverview' is not assignable to type '{ [x: string]: any; show(parentElement: Element, insertBefore?: Element): void; update(): void; d...'.
+    Property '_model' does not exist on type '{ [x: string]: any; show(parentElement: Element, insertBefore?: Element): void; update(): void; d...'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(453,21): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(455,21): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(457,21): error TS2555: Expected at least 2 arguments, but got 1.
@@ -13712,6 +13139,9 @@ node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(467,24
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(471,45): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(491,20): error TS2345: Argument of type 'symbol' is not assignable to parameter of type '{ [x: string]: any; Idle: symbol; StartPending: symbol; Recording: symbol; StopPending: symbol; L...'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(494,60): error TS2339: Property 'traceProviders' does not exist on type 'typeof extensionServer'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(504,107): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; recordingProgress(usage: number): void; }'.
+  Type 'TimelinePanel' is not assignable to type '{ [x: string]: any; recordingProgress(usage: number): void; }'.
+    Property '_dropTarget' does not exist on type '{ [x: string]: any; recordingProgress(usage: number): void; }'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(514,37): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(515,42): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(517,20): error TS2345: Argument of type 'symbol' is not assignable to parameter of type '{ [x: string]: any; Idle: symbol; StartPending: symbol; Recording: symbol; StopPending: symbol; L...'.
@@ -13737,14 +13167,13 @@ node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(829,12
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(831,12): error TS2678: Type 'string' is not comparable to type '{ [x: string]: any; Frame: string; NetworkRequest: string; TraceEvent: string; Range: string; }'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(850,20): error TS2339: Property 'constrain' does not exist on type 'NumberConstructor'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(878,29): error TS2339: Property 'upperBound' does not exist on type 'Event[]'.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(1028,106): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(1029,24): error TS2339: Property 'ModelSelectionData' does not exist on type 'typeof TimelinePanel'.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(1033,42): error TS2694: Namespace 'TimelineSelection' has no exported member 'Type'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(1033,42): error TS2694: Namespace 'Timeline.TimelineSelection' has no exported member 'Type'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(1050,43): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Frame: string; NetworkRequest: string; TraceEvent: string; Range: string; }'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(1059,9): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Frame: string; NetworkRequest: string; TraceEvent: string; Range: string; }'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(1069,9): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Frame: string; NetworkRequest: string; TraceEvent: string; Range: string; }'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(1078,43): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Frame: string; NetworkRequest: string; TraceEvent: string; Range: string; }'.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(1082,43): error TS2694: Namespace 'TimelineSelection' has no exported member 'Type'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(1082,43): error TS2694: Namespace 'Timeline.TimelineSelection' has no exported member 'Type'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(1125,1): error TS8022: JSDoc '@extends' is not attached to a class.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(1129,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(1134,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
@@ -13759,7 +13188,7 @@ node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(1220,2
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(1224,29): error TS2339: Property 'classList' does not exist on type 'Node'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(1234,22): error TS2339: Property 'focus' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelinePanel.js(1291,61): error TS2339: Property 'decodeURIComponent' does not exist on type 'Window'.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(65,58): error TS2694: Namespace 'DataGrid' has no exported member 'ColumnDescriptor'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(65,58): error TS2694: Namespace 'DataGrid.DataGrid' has no exported member 'ColumnDescriptor'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(76,36): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Nearest: string; First: string; Last: string; }'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(133,31): error TS2345: Argument of type 'ToolbarComboBox' is not assignable to parameter of type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
   Type 'ToolbarComboBox' is not assignable to type '{ [x: string]: any; item(): any & any; }'.
@@ -13769,7 +13198,10 @@ node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(136
     Property 'item' is missing in type 'ToolbarInput'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(162,76): error TS2339: Property 'value' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(173,52): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(286,40): error TS2694: Namespace 'DataGrid' has no exported member 'ColumnDescriptor'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(280,5): error TS2322: Type 'TopDownRootNode' is not assignable to type 'Node'.
+  Property 'id' is missing in type 'TopDownRootNode'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(280,5): error TS2322: Type 'TopDownRootNode' is not assignable to type 'Node'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(286,40): error TS2694: Namespace 'DataGrid.DataGrid' has no exported member 'ColumnDescriptor'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(289,38): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(290,39): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(291,42): error TS2555: Expected at least 2 arguments, but got 1.
@@ -13784,20 +13216,20 @@ node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(696
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(698,14): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(712,24): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(717,9): error TS2322: Type '{ name: string; color: string; }' is not assignable to type '{ name: string; color: string; icon: Element; }'.
-  Property 'icon' is missing in type '{ name: string; color: string; }'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(717,9): error TS2322: Type '{ name: string; color: string; }' is not assignable to type '{ name: string; color: string; icon: Element; }'.
+  Property 'icon' is missing in type '{ name: string; color: string; }'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(727,9): error TS2322: Type '{ name: string; color: string; }' is not assignable to type '{ name: string; color: string; icon: Element; }'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(727,9): error TS2322: Type '{ name: string; color: string; }' is not assignable to type '{ name: string; color: string; icon: Element; }'.
   Property 'icon' is missing in type '{ name: string; color: string; }'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(731,13): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(733,9): error TS2322: Type '{ name: any; color: string; }' is not assignable to type '{ name: string; color: string; icon: Element; }'.
-  Property 'icon' is missing in type '{ name: any; color: string; }'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(733,9): error TS2322: Type '{ name: any; color: string; }' is not assignable to type '{ name: string; color: string; icon: Element; }'.
+  Property 'icon' is missing in type '{ name: any; color: string; }'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(743,13): error TS2403: Subsequent variable declarations must have the same type.  Variable 'name' must be of type 'any', but here has type 'string'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(753,91): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(754,9): error TS2322: Type '{ name: any; color: string; }' is not assignable to type '{ name: string; color: string; icon: Element; }'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(754,9): error TS2322: Type '{ name: any; color: string; }' is not assignable to type '{ name: string; color: string; icon: Element; }'.
   Property 'icon' is missing in type '{ name: any; color: string; }'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(754,9): error TS2322: Type '{ name: any; color: string; }' is not assignable to type '{ name: string; color: string; icon: Element; }'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(759,5): error TS2322: Type '{ name: string; color: string; }' is not assignable to type '{ name: string; color: string; icon: Element; }'.
   Property 'icon' is missing in type '{ name: string; color: string; }'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(759,5): error TS2322: Type '{ name: string; color: string; }' is not assignable to type '{ name: string; color: string; icon: Element; }'.
@@ -13815,7 +13247,7 @@ node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(779
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(781,31): error TS2345: Argument of type 'ToolbarButton' is not assignable to parameter of type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
   Type 'ToolbarButton' is not assignable to type '{ [x: string]: any; item(): any & any; }'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(781,77): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(830,51): error TS2694: Namespace 'AggregatedTimelineTreeView' has no exported member 'GroupBy'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(830,51): error TS2694: Namespace 'Timeline.AggregatedTimelineTreeView' has no exported member 'GroupBy'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(836,12): error TS2678: Type 'string' is not comparable to type '{ [x: string]: any; None: string; EventName: string; Category: string; Domain: string; Subdomain:...'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(838,12): error TS2678: Type 'string' is not comparable to type '{ [x: string]: any; None: string; EventName: string; Category: string; Domain: string; Subdomain:...'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(840,12): error TS2678: Type 'string' is not comparable to type '{ [x: string]: any; None: string; EventName: string; Category: string; Domain: string; Subdomain:...'.
@@ -13832,7 +13264,7 @@ node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(977
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(999,49): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Ascending: string; Descending: string; }'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(1019,31): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(1020,26): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(1022,56): error TS2694: Namespace 'DataGrid' has no exported member 'ColumnDescriptor'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(1022,56): error TS2694: Namespace 'DataGrid.DataGrid' has no exported member 'ColumnDescriptor'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(1023,28): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(1024,31): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineTreeView.js(1027,36): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Nearest: string; First: string; Last: string; }'.
@@ -13920,7 +13352,7 @@ node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(202,
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(204,42): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(207,42): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(209,30): error TS2339: Property '_eventStylesMap' does not exist on type 'typeof TimelineUIUtils'.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(214,45): error TS2694: Namespace 'TimelineIRModel' has no exported member 'InputEvents'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(214,45): error TS2694: Namespace 'TimelineModel.TimelineIRModel' has no exported member 'InputEvents'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(218,35): error TS2339: Property '_inputEventToDisplayName' does not exist on type 'typeof TimelineUIUtils'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(222,32): error TS2339: Property '_inputEventToDisplayName' does not exist on type 'typeof TimelineUIUtils'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(223,27): error TS2555: Expected at least 2 arguments, but got 1.
@@ -13956,7 +13388,7 @@ node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(265,
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(266,12): error TS2678: Type 'string' is not comparable to type '{ [x: string]: any; 'Compile': string; 'Parse': string; }'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(267,16): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(336,15): error TS2352: Type 'string' cannot be converted to type '{ [x: string]: any; Char: string; Click: string; ContextMenu: string; FlingCancel: string; FlingS...'.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(336,53): error TS2694: Namespace 'TimelineIRModel' has no exported member 'InputEvents'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(336,53): error TS2694: Namespace 'TimelineModel.TimelineIRModel' has no exported member 'InputEvents'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(373,25): error TS2339: Property 'asParsedURL' does not exist on type 'string'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(412,40): error TS2339: Property '_interactionPhaseStylesMap' does not exist on type 'typeof TimelineUIUtils'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(418,47): error TS2555: Expected at least 2 arguments, but got 1.
@@ -13966,16 +13398,16 @@ node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(422,
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(425,48): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(429,45): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(432,32): error TS2339: Property '_interactionPhaseStylesMap' does not exist on type 'typeof TimelineUIUtils'.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(438,45): error TS2694: Namespace 'TimelineIRModel' has no exported member 'Phases'.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(446,45): error TS2694: Namespace 'TimelineIRModel' has no exported member 'Phases'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(438,45): error TS2694: Namespace 'TimelineModel.TimelineIRModel' has no exported member 'Phases'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(446,45): error TS2694: Namespace 'TimelineModel.TimelineIRModel' has no exported member 'Phases'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(454,24): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(463,41): error TS2694: Namespace 'TimelineUIUtils' has no exported member 'NetworkCategory'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(463,41): error TS2694: Namespace 'Timeline.TimelineUIUtils' has no exported member 'NetworkCategory'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(469,9): error TS2322: Type 'symbol' is not assignable to type '{ [x: string]: any; HTML: symbol; Script: symbol; Style: symbol; Media: symbol; Other: symbol; }'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(473,9): error TS2322: Type 'symbol' is not assignable to type '{ [x: string]: any; HTML: symbol; Script: symbol; Style: symbol; Media: symbol; Other: symbol; }'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(475,9): error TS2322: Type 'symbol' is not assignable to type '{ [x: string]: any; HTML: symbol; Script: symbol; Style: symbol; Media: symbol; Other: symbol; }'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(486,9): error TS2322: Type 'symbol' is not assignable to type '{ [x: string]: any; HTML: symbol; Script: symbol; Style: symbol; Media: symbol; Other: symbol; }'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(488,9): error TS2322: Type 'symbol' is not assignable to type '{ [x: string]: any; HTML: symbol; Script: symbol; Style: symbol; Media: symbol; Other: symbol; }'.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(493,40): error TS2694: Namespace 'TimelineUIUtils' has no exported member 'NetworkCategory'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(493,40): error TS2694: Namespace 'Timeline.TimelineUIUtils' has no exported member 'NetworkCategory'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(499,12): error TS2678: Type 'symbol' is not comparable to type '{ [x: string]: any; HTML: symbol; Script: symbol; Style: symbol; Media: symbol; Other: symbol; }'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(501,12): error TS2678: Type 'symbol' is not comparable to type '{ [x: string]: any; HTML: symbol; Script: symbol; Style: symbol; Media: symbol; Other: symbol; }'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(503,12): error TS2678: Type 'symbol' is not comparable to type '{ [x: string]: any; HTML: symbol; Script: symbol; Style: symbol; Media: symbol; Other: symbol; }'.
@@ -14114,7 +13546,7 @@ node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(1555
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(1557,50): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(1558,51): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(1560,37): error TS2551: Property '_categories' does not exist on type 'typeof TimelineUIUtils'. Did you mean 'categories'?
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(1564,43): error TS2694: Namespace 'TimelineModel' has no exported member 'AsyncEventGroup'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(1564,43): error TS2694: Namespace 'TimelineModel.TimelineModel' has no exported member 'AsyncEventGroup'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(1568,35): error TS2339: Property '_titleForAsyncEventGroupMap' does not exist on type 'typeof TimelineUIUtils'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(1570,32): error TS2339: Property '_titleForAsyncEventGroupMap' does not exist on type 'typeof TimelineUIUtils'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(1571,28): error TS2555: Expected at least 2 arguments, but got 1.
@@ -14134,9 +13566,9 @@ node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(1652
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(1657,64): error TS2345: Argument of type 'new (width?: number, height?: number) => HTMLImageElement' is not assignable to parameter of type 'Node'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(1664,11): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(1665,67): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(1675,5): error TS2322: Type 'DocumentFragment' is not assignable to type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(1675,5): error TS2322: Type 'DocumentFragment' is not assignable to type 'Element'.
   Property 'assignedSlot' is missing in type 'DocumentFragment'.
+node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(1675,5): error TS2322: Type 'DocumentFragment' is not assignable to type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(1684,30): error TS2339: Property 'millisToString' does not exist on type 'NumberConstructor'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(1685,16): error TS2339: Property 'millisToString' does not exist on type 'NumberConstructor'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(1687,13): error TS2339: Property 'createTextChild' does not exist on type 'Element'.
@@ -14185,7 +13617,6 @@ node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(2059
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(2078,23): error TS2339: Property 'createTextChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(2078,39): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(2146,2): error TS1131: Property or signature expected.
-node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(2154,10): error TS2551: Property 'TimelineMarkerStyle' does not exist on type 'typeof Timeline'. Did you mean 'TimelineRecordStyle'?
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(2167,15): error TS2339: Property 'colSpan' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(2186,10): error TS2339: Property 'createTextChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/timeline/TimelineUIUtils.js(2191,5): error TS2322: Type 'string | number' is not assignable to type 'string'.
@@ -14206,7 +13637,7 @@ node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineFrameMode
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineFrameModel.js(223,43): error TS2339: Property 'peekLast' does not exist on type 'any[]'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineFrameModel.js(266,9): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; Begin: string; End: string; Complete: string; Instant: string; AsyncBegin: st...' and 'string'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineFrameModel.js(267,24): error TS2339: Property 'id' does not exist on type 'Event'.
-node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineIRModel.js(14,46): error TS2694: Namespace 'TimelineIRModel' has no exported member 'Phases'.
+node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineIRModel.js(14,46): error TS2694: Namespace 'TimelineModel.TimelineIRModel' has no exported member 'Phases'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineIRModel.js(61,14): error TS2678: Type 'string' is not comparable to type '{ [x: string]: any; Char: string; Click: string; ContextMenu: string; FlingCancel: string; FlingS...'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineIRModel.js(62,61): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Idle: string; Response: string; Scroll: string; Fling: string; Drag: string; ...'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineIRModel.js(66,14): error TS2678: Type 'string' is not comparable to type '{ [x: string]: any; Char: string; Click: string; ContextMenu: string; FlingCancel: string; FlingS...'.
@@ -14245,14 +13676,14 @@ node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineIRModel.j
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineIRModel.js(164,80): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Idle: string; Response: string; Scroll: string; Fling: string; Drag: string; ...'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineIRModel.js(166,63): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Idle: string; Response: string; Scroll: string; Fling: string; Drag: string; ...'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineIRModel.js(188,67): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Idle: string; Response: string; Scroll: string; Fling: string; Drag: string; ...'.
-node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineIRModel.js(193,45): error TS2694: Namespace 'TimelineIRModel' has no exported member 'Phases'.
-node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineIRModel.js(204,45): error TS2694: Namespace 'TimelineIRModel' has no exported member 'Phases'.
-node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineIRModel.js(215,45): error TS2694: Namespace 'TimelineIRModel' has no exported member 'Phases'.
-node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineIRModel.js(249,46): error TS2694: Namespace 'TimelineIRModel' has no exported member 'InputEvents'.
+node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineIRModel.js(193,45): error TS2694: Namespace 'TimelineModel.TimelineIRModel' has no exported member 'Phases'.
+node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineIRModel.js(204,45): error TS2694: Namespace 'TimelineModel.TimelineIRModel' has no exported member 'Phases'.
+node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineIRModel.js(215,45): error TS2694: Namespace 'TimelineModel.TimelineIRModel' has no exported member 'Phases'.
+node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineIRModel.js(249,46): error TS2694: Namespace 'TimelineModel.TimelineIRModel' has no exported member 'InputEvents'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineIRModel.js(255,20): error TS2352: Type 'string' cannot be converted to type '{ [x: string]: any; Char: string; Click: string; ContextMenu: string; FlingCancel: string; FlingS...'.
-node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineIRModel.js(255,58): error TS2694: Namespace 'TimelineIRModel' has no exported member 'InputEvents'.
+node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineIRModel.js(255,58): error TS2694: Namespace 'TimelineModel.TimelineIRModel' has no exported member 'InputEvents'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineIRModel.js(259,16): error TS2352: Type 'string' cannot be converted to type '{ [x: string]: any; Char: string; Click: string; ContextMenu: string; FlingCancel: string; FlingS...'.
-node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineIRModel.js(259,54): error TS2694: Namespace 'TimelineIRModel' has no exported member 'InputEvents'.
+node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineIRModel.js(259,54): error TS2694: Namespace 'TimelineModel.TimelineIRModel' has no exported member 'InputEvents'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineJSProfile.js(18,47): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineJSProfile.js(31,50): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineJSProfile.js(31,89): error TS2339: Property 'depth' does not exist on type 'CPUProfileNode'.
@@ -14270,26 +13701,26 @@ node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineJSProfile
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineJSProfile.js(190,82): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Begin: string; End: string; Complete: string; Instant: string; AsyncBegin: st...'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineJSProfile.js(192,34): error TS2339: Property 'ordinal' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineJSProfile.js(209,24): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
-node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineJSProfile.js(218,57): error TS2694: Namespace 'TimelineJSProfileProcessor' has no exported member 'NativeGroups'.
+node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineJSProfile.js(218,57): error TS2694: Namespace 'TimelineModel.TimelineJSProfileProcessor' has no exported member 'NativeGroups'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineJSProfile.js(222,7): error TS2322: Type 'string' is not assignable to type '{ [x: string]: any; 'Compile': string; 'Parse': string; }'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineJSProfile.js(224,7): error TS2322: Type 'string' is not assignable to type '{ [x: string]: any; 'Compile': string; 'Parse': string; }'.
-node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineJSProfile.js(230,42): error TS2694: Namespace 'TracingManager' has no exported member 'EventPayload'.
-node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineJSProfile.js(289,37): error TS2694: Namespace 'TracingManager' has no exported member 'EventPayload'.
-node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineJSProfile.js(292,50): error TS2694: Namespace 'TracingManager' has no exported member 'EventPayload'.
+node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineJSProfile.js(230,42): error TS2694: Namespace 'SDK.TracingManager' has no exported member 'EventPayload'.
+node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineJSProfile.js(289,37): error TS2694: Namespace 'SDK.TracingManager' has no exported member 'EventPayload'.
+node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineJSProfile.js(292,50): error TS2694: Namespace 'SDK.TracingManager' has no exported member 'EventPayload'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(59,41): error TS2345: Argument of type '{ [x: string]: any; Begin: string; End: string; Complete: string; Instant: string; AsyncBegin: st...' is not assignable to parameter of type 'string'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(59,82): error TS2345: Argument of type '{ [x: string]: any; Begin: string; End: string; Complete: string; Instant: string; AsyncBegin: st...' is not assignable to parameter of type 'string'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(61,36): error TS2339: Property 'peekLast' does not exist on type 'Event[]'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(69,51): error TS2339: Property 'peekLast' does not exist on type 'Event[]'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(69,51): error TS2339: Property 'peekLast' does not exist on type 'any[]'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(81,24): error TS2339: Property 'upperBound' does not exist on type 'Event[]'.
-node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(216,44): error TS2694: Namespace 'TimelineModel' has no exported member 'MetadataEvents'.
+node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(216,44): error TS2694: Namespace 'TimelineModel.TimelineModel' has no exported member 'MetadataEvents'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(274,54): error TS2339: Property 'valuesArray' does not exist on type 'Set<any>'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(294,81): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Begin: string; End: string; Complete: string; Instant: string; AsyncBegin: st...'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(306,41): error TS2339: Property 'lowerBound' does not exist on type 'Event[]'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(314,70): error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [x: string]: any; Begin: string; End: string; Complete: string; Instant: string; AsyncBegin: st...'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(317,32): error TS2339: Property 'lowerBound' does not exist on type 'Event[]'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(320,29): error TS2339: Property 'lowerBound' does not exist on type 'Event[]'.
-node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(333,50): error TS2694: Namespace 'TimelineModel' has no exported member 'AsyncEventGroup'.
+node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(333,50): error TS2694: Namespace 'TimelineModel.TimelineModel' has no exported member 'AsyncEventGroup'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(377,34): error TS2339: Property 'peekLast' does not exist on type 'Event[]'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(380,41): error TS2694: Namespace 'Protocol' has no exported member 'Profiler'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(392,41): error TS2694: Namespace 'Protocol' has no exported member 'Profiler'.
@@ -14299,13 +13730,13 @@ node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(476,46): error TS2339: Property 'peekLast' does not exist on type 'any[]'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(480,42): error TS2345: Argument of type '{ [x: string]: any; Begin: string; End: string; Complete: string; Instant: string; AsyncBegin: st...' is not assignable to parameter of type 'string'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(482,35): error TS2339: Property 'peekLast' does not exist on type 'any[]'.
-node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(536,48): error TS2694: Namespace 'TimelineModel' has no exported member 'AsyncEventGroup'.
+node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(536,48): error TS2694: Namespace 'TimelineModel.TimelineModel' has no exported member 'AsyncEventGroup'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(542,37): error TS2339: Property 'lowerBound' does not exist on type 'AsyncEvent[]'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(601,68): error TS2339: Property 'peekLast' does not exist on type 'any[]'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(607,46): error TS2339: Property 'peekLast' does not exist on type 'any[]'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(762,13): error TS2403: Subsequent variable declarations must have the same type.  Variable 'frameId' must be of type 'any', but here has type 'string'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(801,40): error TS2339: Property 'bind_id' does not exist on type 'Event'.
-node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(806,44): error TS2694: Namespace 'TimelineModel' has no exported member 'AsyncEventGroup'.
+node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(806,44): error TS2694: Namespace 'TimelineModel.TimelineModel' has no exported member 'AsyncEventGroup'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(811,7): error TS2322: Type 'symbol' is not assignable to type '{ [x: string]: any; animation: symbol; console: symbol; userTiming: symbol; input: symbol; }'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(813,7): error TS2322: Type 'symbol' is not assignable to type '{ [x: string]: any; animation: symbol; console: symbol; userTiming: symbol; input: symbol; }'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(815,7): error TS2322: Type 'symbol' is not assignable to type '{ [x: string]: any; animation: symbol; console: symbol; userTiming: symbol; input: symbol; }'.
@@ -14313,25 +13744,22 @@ node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(823,18): error TS2339: Property 'causedFrame' does not exist on type 'AsyncEvent'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(827,109): error TS2339: Property 'causedFrame' does not exist on type 'AsyncEvent'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(836,7): error TS2322: Type 'symbol' is not assignable to type '{ [x: string]: any; animation: symbol; console: symbol; userTiming: symbol; input: symbol; }'.
-node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(855,48): error TS2694: Namespace 'TimelineModel' has no exported member 'AsyncEventGroup'.
-node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(856,48): error TS2694: Namespace 'TimelineModel' has no exported member 'AsyncEventGroup'.
+node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(855,48): error TS2694: Namespace 'TimelineModel.TimelineModel' has no exported member 'AsyncEventGroup'.
+node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(856,48): error TS2694: Namespace 'TimelineModel.TimelineModel' has no exported member 'AsyncEventGroup'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(861,23): error TS2339: Property 'mergeOrdered' does not exist on type 'AsyncEvent[]'.
-node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(883,50): error TS2694: Namespace 'TimelineModel' has no exported member 'AsyncEventGroup'.
-node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(940,49): error TS2694: Namespace 'TimelineModel' has no exported member 'AsyncEventGroup'.
-node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(1247,50): error TS2694: Namespace 'TimelineModel' has no exported member 'AsyncEventGroup'.
-node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(1259,99): error TS1003: Identifier expected.
+node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(883,50): error TS2694: Namespace 'TimelineModel.TimelineModel' has no exported member 'AsyncEventGroup'.
+node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(940,49): error TS2694: Namespace 'TimelineModel.TimelineModel' has no exported member 'AsyncEventGroup'.
+node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(1247,50): error TS2694: Namespace 'TimelineModel.TimelineModel' has no exported member 'AsyncEventGroup'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(1260,29): error TS2339: Property 'MetadataEvents' does not exist on type 'typeof TimelineModel'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(1423,31): error TS2694: Namespace 'TimelineModel' has no exported member 'InvalidationCause'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(1433,61): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
-node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(1433,82): error TS1003: Identifier expected.
-node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(1434,15): error TS2339: Property 'InvalidationCause' does not exist on type 'typeof TimelineModel'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(1524,30): error TS2488: Type 'Iterator<InvalidationTrackingEvent>' must have a '[Symbol.iterator]()' method that returns an iterator.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(1532,22): error TS2339: Property 'linkedRecalcStyleEvent' does not exist on type 'InvalidationTrackingEvent'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(1548,18): error TS2339: Property 'linkedRecalcStyleEvent' does not exist on type 'InvalidationTrackingEvent'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(1600,23): error TS2339: Property 'linkedRecalcStyleEvent' does not exist on type 'InvalidationTrackingEvent'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(1609,30): error TS2488: Type 'Iterator<InvalidationTrackingEvent>' must have a '[Symbol.iterator]()' method that returns an iterator.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(1642,30): error TS2488: Type 'Iterator<InvalidationTrackingEvent>' must have a '[Symbol.iterator]()' method that returns an iterator.
-node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(1707,50): error TS2694: Namespace 'TimelineModel' has no exported member 'RecordType'.
+node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(1707,50): error TS2694: Namespace 'TimelineModel.TimelineModel' has no exported member 'RecordType'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(1709,67): error TS2339: Property '_asyncEvents' does not exist on type 'typeof TimelineAsyncEventTracker'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(1714,49): error TS2339: Property '_asyncEvents' does not exist on type 'typeof TimelineAsyncEventTracker'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(1730,45): error TS2339: Property '_asyncEvents' does not exist on type 'typeof TimelineAsyncEventTracker'.
@@ -14339,60 +13767,57 @@ node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(1736,49): error TS2339: Property '_typeToInitiator' does not exist on type 'typeof TimelineAsyncEventTracker'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(1744,65): error TS2339: Property '_typeToInitiator' does not exist on type 'typeof TimelineAsyncEventTracker'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(1745,13): error TS2352: Type 'string' cannot be converted to type '{ [x: string]: any; Task: string; Program: string; EventDispatch: string; GPUTask: string; Animat...'.
-node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(1745,49): error TS2694: Namespace 'TimelineModel' has no exported member 'RecordType'.
+node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(1745,49): error TS2694: Namespace 'TimelineModel.TimelineModel' has no exported member 'RecordType'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(1748,27): error TS2352: Type 'string' cannot be converted to type '{ [x: string]: any; Task: string; Program: string; EventDispatch: string; GPUTask: string; Animat...'.
-node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(1748,63): error TS2694: Namespace 'TimelineModel' has no exported member 'RecordType'.
+node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(1748,63): error TS2694: Namespace 'TimelineModel.TimelineModel' has no exported member 'RecordType'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(1749,65): error TS2339: Property '_asyncEvents' does not exist on type 'typeof TimelineAsyncEventTracker'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(1780,33): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(1811,25): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModel.js(1819,32): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModelFilter.js(30,35): error TS2345: Argument of type '{ [x: string]: any; Task: string; Program: string; EventDispatch: string; GPUTask: string; Animat...' is not assignable to parameter of type 'string'.
-node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModelFilter.js(34,44): error TS2694: Namespace 'TimelineModel' has no exported member 'RecordType'.
+node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModelFilter.js(34,44): error TS2694: Namespace 'TimelineModel.TimelineModel' has no exported member 'RecordType'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModelFilter.js(38,7): error TS2322: Type 'string' is not assignable to type '{ [x: string]: any; Task: string; Program: string; EventDispatch: string; GPUTask: string; Animat...'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModelFilter.js(40,7): error TS2322: Type 'string' is not assignable to type '{ [x: string]: any; Task: string; Program: string; EventDispatch: string; GPUTask: string; Animat...'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModelFilter.js(42,7): error TS2322: Type 'string' is not assignable to type '{ [x: string]: any; Task: string; Program: string; EventDispatch: string; GPUTask: string; Animat...'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModelFilter.js(43,22): error TS1110: Type expected.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineModelFilter.js(62,38): error TS2345: Argument of type '{ [x: string]: any; Task: string; Program: string; EventDispatch: string; GPUTask: string; Animat...' is not assignable to parameter of type 'string'.
-node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineProfileTree.js(68,49): error TS2506: 'TopDownNode' is referenced directly or indirectly in its own base expression.
-node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineProfileTree.js(105,48): error TS2339: Property '_isGroupNode' does not exist on type 'TopDownNode'.
+node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineProfileTree.js(74,26): error TS2502: 'parent' is referenced directly or indirectly in its own type annotation.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineProfileTree.js(168,31): error TS2345: Argument of type 'string | symbol' is not assignable to parameter of type 'string'.
   Type 'symbol' is not assignable to type 'string'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineProfileTree.js(172,22): error TS2345: Argument of type 'string | symbol' is not assignable to parameter of type 'string'.
   Type 'symbol' is not assignable to type 'string'.
-node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineProfileTree.js(218,53): error TS2506: 'TopDownRootNode' is referenced directly or indirectly in its own base expression.
-node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineProfileTree.js(273,54): error TS2506: 'BottomUpRootNode' is referenced directly or indirectly in its own base expression.
-node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineProfileTree.js(391,47): error TS2506: 'GroupNode' is referenced directly or indirectly in its own base expression.
-node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineProfileTree.js(411,10): error TS2339: Property 'selfTime' does not exist on type 'GroupNode'.
-node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineProfileTree.js(412,10): error TS2339: Property 'totalTime' does not exist on type 'GroupNode'.
-node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineProfileTree.js(433,50): error TS2506: 'BottomUpNode' is referenced directly or indirectly in its own base expression.
+node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineProfileTree.js(391,47): error TS2415: Class 'GroupNode' incorrectly extends base class 'Node'.
+node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineProfileTree.js(391,47): error TS2415: Class 'GroupNode' incorrectly extends base class 'Node'.
+  Types of property 'parent' are incompatible.
+    Type 'TopDownRootNode | BottomUpRootNode' is not assignable to type 'Node'.
+      Type 'TopDownRootNode' is not assignable to type 'Node'.
+node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineProfileTree.js(413,5): error TS2322: Type 'this' is not assignable to type 'Node'.
+  Type 'GroupNode' is not assignable to type 'Node'.
+    Types of property 'parent' are incompatible.
+      Type 'TopDownRootNode | BottomUpRootNode' is not assignable to type 'Node'.
+        Type 'TopDownRootNode' is not assignable to type 'Node'.
+node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineProfileTree.js(413,5): error TS2322: Type 'this' is not assignable to type 'Node'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineProfileTree.js(445,27): error TS2339: Property '_depth' does not exist on type 'Node'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineProfileTree.js(501,46): error TS2322: Type 'Node' is not assignable to type 'this'.
-node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineProfileTree.js(502,18): error TS2339: Property 'id' does not exist on type 'BottomUpNode'.
-node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineProfileTree.js(505,16): error TS2339: Property 'id' does not exist on type 'BottomUpNode'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineProfileTree.js(508,11): error TS2403: Subsequent variable declarations must have the same type.  Variable 'node' must be of type 'this', but here has type 'Node'.
-node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineProfileTree.js(513,31): error TS2345: Argument of type 'this' is not assignable to parameter of type 'Node'.
-  Type 'BottomUpNode' is not assignable to type 'Node'.
-    Property 'totalTime' is missing in type 'BottomUpNode'.
-node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineProfileTree.js(516,12): error TS2339: Property 'selfTime' does not exist on type 'BottomUpNode'.
-node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineProfileTree.js(517,12): error TS2339: Property 'totalTime' does not exist on type 'BottomUpNode'.
-node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineProfileTree.js(533,14): error TS2339: Property 'event' does not exist on type 'BottomUpNode'.
-node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineProfileTree.js(533,42): error TS2339: Property 'event' does not exist on type 'BottomUpNode'.
-node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineProfileTree.js(534,20): error TS2345: Argument of type 'this' is not assignable to parameter of type 'Node'.
+node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineProfileTree.js(512,9): error TS2322: Type 'BottomUpNode' is not assignable to type 'this'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineProfileTree.js(559,23): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TimelineProfileTree.js(563,33): error TS2694: Namespace 'Protocol' has no exported member 'Runtime'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TracingLayerTree.js(6,41): error TS2694: Namespace 'TimelineModel' has no exported member 'TracingLayerPayload'.
-node_modules/chrome-devtools-frontend/front_end/timeline_model/TracingLayerTree.js(17,1): error TS1003: Identifier expected.
-node_modules/chrome-devtools-frontend/front_end/timeline_model/TracingLayerTree.js(18,15): error TS2339: Property 'TracingLayerPayload' does not exist on type 'typeof TimelineModel'.
-node_modules/chrome-devtools-frontend/front_end/timeline_model/TracingLayerTree.js(26,1): error TS1003: Identifier expected.
-node_modules/chrome-devtools-frontend/front_end/timeline_model/TracingLayerTree.js(27,15): error TS2551: Property 'TracingLayerTile' does not exist on type 'typeof TimelineModel'. Did you mean 'TracingLayerTree'?
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TracingLayerTree.js(38,45): error TS2694: Namespace 'TimelineModel' has no exported member 'TracingLayerTile'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TracingLayerTree.js(44,29): error TS2694: Namespace 'TimelineModel' has no exported member 'TracingLayerPayload'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TracingLayerTree.js(45,36): error TS2694: Namespace 'TimelineModel' has no exported member 'TracingLayerPayload'.
+node_modules/chrome-devtools-frontend/front_end/timeline_model/TracingLayerTree.js(67,20): error TS2345: Argument of type 'TracingLayer' is not assignable to parameter of type '{ [x: string]: any; id(): string; parentId(): string; parent(): any; isRoot(): boolean; children(...'.
+  Property '_paintProfilerModel' does not exist on type '{ [x: string]: any; id(): string; parentId(): string; parent(): any; isRoot(): boolean; children(...'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TracingLayerTree.js(81,37): error TS2694: Namespace 'TimelineModel' has no exported member 'TracingLayerTile'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TracingLayerTree.js(91,29): error TS2694: Namespace 'SDK' has no exported member 'SnapshotWithRect'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TracingLayerTree.js(97,39): error TS2694: Namespace 'SDK' has no exported member 'SnapshotWithRect'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TracingLayerTree.js(102,39): error TS2694: Namespace 'SDK' has no exported member 'SnapshotWithRect'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TracingLayerTree.js(120,29): error TS2694: Namespace 'TimelineModel' has no exported member 'TracingLayerPayload'.
+node_modules/chrome-devtools-frontend/front_end/timeline_model/TracingLayerTree.js(133,27): error TS2345: Argument of type 'TracingLayer' is not assignable to parameter of type '{ [x: string]: any; id(): string; parentId(): string; parent(): any; isRoot(): boolean; children(...'.
+  Property '_paintProfilerModel' does not exist on type '{ [x: string]: any; id(): string; parentId(): string; parent(): any; isRoot(): boolean; children(...'.
+node_modules/chrome-devtools-frontend/front_end/timeline_model/TracingLayerTree.js(135,22): error TS2345: Argument of type 'TracingLayer' is not assignable to parameter of type '{ [x: string]: any; id(): string; parentId(): string; parent(): any; isRoot(): boolean; children(...'.
+  Property '_paintProfilerModel' does not exist on type '{ [x: string]: any; id(): string; parentId(): string; parent(): any; isRoot(): boolean; children(...'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TracingLayerTree.js(142,29): error TS2694: Namespace 'TimelineModel' has no exported member 'TracingLayerPayload'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TracingLayerTree.js(160,29): error TS2694: Namespace 'TimelineModel' has no exported member 'TracingLayerPayload'.
 node_modules/chrome-devtools-frontend/front_end/timeline_model/TracingLayerTree.js(168,29): error TS2694: Namespace 'TimelineModel' has no exported member 'TracingLayerPayload'.
@@ -14435,15 +13860,20 @@ node_modules/chrome-devtools-frontend/front_end/ui/ContextMenu.js(309,40): error
 node_modules/chrome-devtools-frontend/front_end/ui/ContextMenu.js(339,39): error TS2339: Property 'x' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/ui/ContextMenu.js(340,39): error TS2339: Property 'y' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/ui/ContextMenu.js(344,24): error TS2339: Property 'deepElementFromPoint' does not exist on type 'Event'.
+node_modules/chrome-devtools-frontend/front_end/ui/ContextMenu.js(350,27): error TS2551: Property 'events' does not exist on type 'typeof InspectorFrontendHostAPI'. Did you mean 'Events'?
 node_modules/chrome-devtools-frontend/front_end/ui/ContextMenu.js(352,24): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/ui/ContextMenu.js(408,17): error TS2339: Property 'consume' does not exist on type 'Event'.
-node_modules/chrome-devtools-frontend/front_end/ui/ContextMenu.js(418,83): error TS2339: Property 'isHostedMode' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/ui/ContextMenu.js(418,83): error TS2339: Property 'isHostedMode' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/ui/ContextMenu.js(420,46): error TS2339: Property 'ownerDocument' does not exist on type 'EventTarget'.
-node_modules/chrome-devtools-frontend/front_end/ui/ContextMenu.js(422,29): error TS2339: Property 'showContextMenuAtPoint' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/ui/ContextMenu.js(422,29): error TS2339: Property 'showContextMenuAtPoint' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/ui/ContextMenu.js(422,101): error TS2339: Property 'ownerDocument' does not exist on type 'EventTarget'.
+node_modules/chrome-devtools-frontend/front_end/ui/ContextMenu.js(428,31): error TS2551: Property 'events' does not exist on type 'typeof InspectorFrontendHostAPI'. Did you mean 'Events'?
+node_modules/chrome-devtools-frontend/front_end/ui/ContextMenu.js(430,31): error TS2551: Property 'events' does not exist on type 'typeof InspectorFrontendHostAPI'. Did you mean 'Events'?
 node_modules/chrome-devtools-frontend/front_end/ui/ContextMenu.js(450,49): error TS2694: Namespace 'InspectorFrontendHostAPI' has no exported member 'ContextMenuDescriptor'.
 node_modules/chrome-devtools-frontend/front_end/ui/ContextMenu.js(453,57): error TS2694: Namespace 'InspectorFrontendHostAPI' has no exported member 'ContextMenuDescriptor'.
 node_modules/chrome-devtools-frontend/front_end/ui/ContextMenu.js(457,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
+node_modules/chrome-devtools-frontend/front_end/ui/ContextMenu.js(473,27): error TS2551: Property 'events' does not exist on type 'typeof InspectorFrontendHostAPI'. Did you mean 'Events'?
+node_modules/chrome-devtools-frontend/front_end/ui/ContextMenu.js(475,27): error TS2551: Property 'events' does not exist on type 'typeof InspectorFrontendHostAPI'. Did you mean 'Events'?
 node_modules/chrome-devtools-frontend/front_end/ui/ContextMenu.js(483,37): error TS2339: Property 'runtime' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/ui/ContextMenu.js(491,32): error TS2339: Property 'runtime' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/ui/ContextMenu.js(519,32): error TS2502: 'contextMenu' is referenced directly or indirectly in its own type annotation.
@@ -14479,10 +13909,10 @@ node_modules/chrome-devtools-frontend/front_end/ui/FilterBar.js(175,52): error T
 node_modules/chrome-devtools-frontend/front_end/ui/FilterBar.js(180,24): error TS2339: Property 'title' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/ui/FilterBar.js(180,32): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/ui/FilterBar.js(181,33): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/ui/FilterBar.js(184,76): error TS2694: Namespace 'SuggestBox' has no exported member 'Suggestions'.
-node_modules/chrome-devtools-frontend/front_end/ui/FilterBar.js(192,39): error TS2694: Namespace 'SuggestBox' has no exported member 'Suggestions'.
-node_modules/chrome-devtools-frontend/front_end/ui/FilterBar.js(235,74): error TS2694: Namespace 'SuggestBox' has no exported member 'Suggestions'.
-node_modules/chrome-devtools-frontend/front_end/ui/FilterBar.js(253,46): error TS2694: Namespace 'NamedBitSetFilterUI' has no exported member 'Item'.
+node_modules/chrome-devtools-frontend/front_end/ui/FilterBar.js(184,76): error TS2694: Namespace 'UI.SuggestBox' has no exported member 'Suggestions'.
+node_modules/chrome-devtools-frontend/front_end/ui/FilterBar.js(192,39): error TS2694: Namespace 'UI.SuggestBox' has no exported member 'Suggestions'.
+node_modules/chrome-devtools-frontend/front_end/ui/FilterBar.js(235,74): error TS2694: Namespace 'UI.SuggestBox' has no exported member 'Suggestions'.
+node_modules/chrome-devtools-frontend/front_end/ui/FilterBar.js(253,46): error TS2694: Namespace 'UI.NamedBitSetFilterUI' has no exported member 'Item'.
 node_modules/chrome-devtools-frontend/front_end/ui/FilterBar.js(259,26): error TS2339: Property 'title' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/ui/FilterBar.js(265,52): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/ui/FilterBar.js(266,26): error TS2339: Property 'createChild' does not exist on type 'Element'.
@@ -14496,13 +13926,13 @@ node_modules/chrome-devtools-frontend/front_end/ui/FilterBar.js(351,32): error T
 node_modules/chrome-devtools-frontend/front_end/ui/FilterBar.js(351,46): error TS2339: Property 'altKey' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/ui/FilterBar.js(351,59): error TS2339: Property 'shiftKey' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/ui/FilterBar.js(352,37): error TS2339: Property 'typeName' does not exist on type 'EventTarget'.
-node_modules/chrome-devtools-frontend/front_end/ui/FilterBar.js(374,73): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/ui/FilterBar.js(375,24): error TS2300: Duplicate identifier 'Item'.
 node_modules/chrome-devtools-frontend/front_end/ui/FilterBar.js(375,24): error TS2339: Property 'Item' does not exist on type 'typeof NamedBitSetFilterUI'.
-node_modules/chrome-devtools-frontend/front_end/ui/FilterSuggestionBuilder.js(21,39): error TS2694: Namespace 'SuggestBox' has no exported member 'Suggestions'.
+node_modules/chrome-devtools-frontend/front_end/ui/FilterSuggestionBuilder.js(21,39): error TS2694: Namespace 'UI.SuggestBox' has no exported member 'Suggestions'.
+node_modules/chrome-devtools-frontend/front_end/ui/ForwardedInputEventHandler.js(9,27): error TS2551: Property 'events' does not exist on type 'typeof InspectorFrontendHostAPI'. Did you mean 'Events'?
 node_modules/chrome-devtools-frontend/front_end/ui/ForwardedInputEventHandler.js(14,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/ui/Fragment.js(12,49): error TS2694: Namespace 'Fragment' has no exported member '_State'.
-node_modules/chrome-devtools-frontend/front_end/ui/Fragment.js(84,28): error TS2694: Namespace 'Fragment' has no exported member '_Template'.
+node_modules/chrome-devtools-frontend/front_end/ui/Fragment.js(12,49): error TS2694: Namespace 'UI.Fragment' has no exported member '_State'.
+node_modules/chrome-devtools-frontend/front_end/ui/Fragment.js(84,28): error TS2694: Namespace 'UI.Fragment' has no exported member '_Template'.
 node_modules/chrome-devtools-frontend/front_end/ui/Fragment.js(113,55): error TS2339: Property 'hasAttributes' does not exist on type 'Node'.
 node_modules/chrome-devtools-frontend/front_end/ui/Fragment.js(114,18): error TS2339: Property 'hasAttribute' does not exist on type 'Node'.
 node_modules/chrome-devtools-frontend/front_end/ui/Fragment.js(116,39): error TS2339: Property 'getAttribute' does not exist on type 'Node'.
@@ -14519,7 +13949,7 @@ node_modules/chrome-devtools-frontend/front_end/ui/Fragment.js(153,14): error TS
 node_modules/chrome-devtools-frontend/front_end/ui/Fragment.js(166,103): error TS2339: Property 'data' does not exist on type 'Node'.
 node_modules/chrome-devtools-frontend/front_end/ui/Fragment.js(171,22): error TS2339: Property 'classList' does not exist on type 'Node'.
 node_modules/chrome-devtools-frontend/front_end/ui/Fragment.js(174,21): error TS2339: Property 'remove' does not exist on type 'Node'.
-node_modules/chrome-devtools-frontend/front_end/ui/Fragment.js(179,27): error TS2694: Namespace 'Fragment' has no exported member '_Template'.
+node_modules/chrome-devtools-frontend/front_end/ui/Fragment.js(179,27): error TS2694: Namespace 'UI.Fragment' has no exported member '_Template'.
 node_modules/chrome-devtools-frontend/front_end/ui/Fragment.js(247,24): error TS2488: Type 'NodeListOf<Element>' must have a '[Symbol.iterator]()' method that returns an iterator.
 node_modules/chrome-devtools-frontend/front_end/ui/Fragment.js(272,2): error TS1131: Property or signature expected.
 node_modules/chrome-devtools-frontend/front_end/ui/Fragment.js(276,13): error TS2551: Property '_Template' does not exist on type 'typeof Fragment'. Did you mean '_template'?
@@ -14531,12 +13961,12 @@ node_modules/chrome-devtools-frontend/front_end/ui/Geometry.js(210,15): error TS
 node_modules/chrome-devtools-frontend/front_end/ui/Geometry.js(272,13): error TS2304: Cannot find name 'CSSMatrix'.
 node_modules/chrome-devtools-frontend/front_end/ui/Geometry.js(316,13): error TS2304: Cannot find name 'CSSMatrix'.
 node_modules/chrome-devtools-frontend/front_end/ui/GlassPane.js(15,35): error TS2345: Argument of type 'symbol' is not assignable to parameter of type '{ [x: string]: any; BlockedByGlassPane: symbol; PierceGlassPane: symbol; PierceContents: symbol; }'.
-node_modules/chrome-devtools-frontend/front_end/ui/GlassPane.js(62,28): error TS2694: Namespace 'GlassPane' has no exported member 'PointerEventsBehavior'.
+node_modules/chrome-devtools-frontend/front_end/ui/GlassPane.js(62,28): error TS2694: Namespace 'UI.GlassPane' has no exported member 'PointerEventsBehavior'.
 node_modules/chrome-devtools-frontend/front_end/ui/GlassPane.js(66,30): error TS2365: Operator '!==' cannot be applied to types '{ [x: string]: any; BlockedByGlassPane: symbol; PierceGlassPane: symbol; PierceContents: symbol; }' and 'symbol'.
 node_modules/chrome-devtools-frontend/front_end/ui/GlassPane.js(68,30): error TS2365: Operator '===' cannot be applied to types '{ [x: string]: any; BlockedByGlassPane: symbol; PierceGlassPane: symbol; PierceContents: symbol; }' and 'symbol'.
-node_modules/chrome-devtools-frontend/front_end/ui/GlassPane.js(87,28): error TS2694: Namespace 'GlassPane' has no exported member 'SizeBehavior'.
+node_modules/chrome-devtools-frontend/front_end/ui/GlassPane.js(87,28): error TS2694: Namespace 'UI.GlassPane' has no exported member 'SizeBehavior'.
 node_modules/chrome-devtools-frontend/front_end/ui/GlassPane.js(90,5): error TS2322: Type '{ [x: string]: any; SetExactSize: symbol; SetExactWidthMaxHeight: symbol; MeasureContent: symbol; }' is not assignable to type 'symbol'.
-node_modules/chrome-devtools-frontend/front_end/ui/GlassPane.js(115,28): error TS2694: Namespace 'GlassPane' has no exported member 'AnchorBehavior'.
+node_modules/chrome-devtools-frontend/front_end/ui/GlassPane.js(115,28): error TS2694: Namespace 'UI.GlassPane' has no exported member 'AnchorBehavior'.
 node_modules/chrome-devtools-frontend/front_end/ui/GlassPane.js(118,5): error TS2322: Type '{ [x: string]: any; PreferTop: symbol; PreferBottom: symbol; PreferLeft: symbol; PreferRight: sym...' is not assignable to type 'symbol'.
 node_modules/chrome-devtools-frontend/front_end/ui/GlassPane.js(125,5): error TS2322: Type 'boolean' is not assignable to type 'symbol'.
 node_modules/chrome-devtools-frontend/front_end/ui/GlassPane.js(126,51): error TS2365: Operator '!==' cannot be applied to types 'boolean' and 'symbol'.
@@ -14574,43 +14004,41 @@ node_modules/chrome-devtools-frontend/front_end/ui/Icon.js(9,1): error TS8022: J
 node_modules/chrome-devtools-frontend/front_end/ui/Icon.js(21,18): error TS2339: Property '_constructor' does not exist on type 'typeof Icon'.
 node_modules/chrome-devtools-frontend/front_end/ui/Icon.js(22,15): error TS2339: Property '_constructor' does not exist on type 'typeof Icon'.
 node_modules/chrome-devtools-frontend/front_end/ui/Icon.js(24,53): error TS2339: Property '_constructor' does not exist on type 'typeof Icon'.
-node_modules/chrome-devtools-frontend/front_end/ui/Icon.js(36,25): error TS2694: Namespace 'Icon' has no exported member 'Descriptor'.
-node_modules/chrome-devtools-frontend/front_end/ui/Icon.js(38,25): error TS2694: Namespace 'Icon' has no exported member 'SpriteSheet'.
-node_modules/chrome-devtools-frontend/front_end/ui/Icon.js(104,85): error TS1003: Identifier expected.
+node_modules/chrome-devtools-frontend/front_end/ui/Icon.js(36,25): error TS2694: Namespace 'UI.Icon' has no exported member 'Descriptor'.
+node_modules/chrome-devtools-frontend/front_end/ui/Icon.js(38,25): error TS2694: Namespace 'UI.Icon' has no exported member 'SpriteSheet'.
 node_modules/chrome-devtools-frontend/front_end/ui/Icon.js(105,9): error TS2300: Duplicate identifier 'Descriptor'.
 node_modules/chrome-devtools-frontend/front_end/ui/Icon.js(105,9): error TS2551: Property 'Descriptor' does not exist on type 'typeof Icon'. Did you mean 'Descriptors'?
-node_modules/chrome-devtools-frontend/front_end/ui/Icon.js(107,73): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/ui/Icon.js(108,9): error TS2551: Property 'SpriteSheet' does not exist on type 'typeof Icon'. Did you mean 'SpriteSheets'?
-node_modules/chrome-devtools-frontend/front_end/ui/Infobar.js(9,26): error TS2694: Namespace 'Infobar' has no exported member 'Type'.
+node_modules/chrome-devtools-frontend/front_end/ui/Infobar.js(9,26): error TS2694: Namespace 'UI.Infobar' has no exported member 'Type'.
 node_modules/chrome-devtools-frontend/front_end/ui/Infobar.js(16,45): error TS2339: Property 'createChild' does not exist on type 'DocumentFragment'.
 node_modules/chrome-devtools-frontend/front_end/ui/Infobar.js(26,39): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/ui/Infobar.js(32,35): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/ui/Infobar.js(44,26): error TS2694: Namespace 'Infobar' has no exported member 'Type'.
-node_modules/chrome-devtools-frontend/front_end/ui/InplaceEditor.js(11,33): error TS2694: Namespace 'InplaceEditor' has no exported member 'Controller'.
+node_modules/chrome-devtools-frontend/front_end/ui/Infobar.js(44,26): error TS2694: Namespace 'UI.Infobar' has no exported member 'Type'.
+node_modules/chrome-devtools-frontend/front_end/ui/InplaceEditor.js(11,33): error TS2694: Namespace 'UI.InplaceEditor' has no exported member 'Controller'.
 node_modules/chrome-devtools-frontend/front_end/ui/InplaceEditor.js(14,27): error TS2339: Property '_defaultInstance' does not exist on type 'typeof InplaceEditor'.
 node_modules/chrome-devtools-frontend/front_end/ui/InplaceEditor.js(15,24): error TS2339: Property '_defaultInstance' does not exist on type 'typeof InplaceEditor'.
 node_modules/chrome-devtools-frontend/front_end/ui/InplaceEditor.js(16,29): error TS2339: Property '_defaultInstance' does not exist on type 'typeof InplaceEditor'.
-node_modules/chrome-devtools-frontend/front_end/ui/InplaceEditor.js(69,33): error TS2694: Namespace 'InplaceEditor' has no exported member 'Controller'.
+node_modules/chrome-devtools-frontend/front_end/ui/InplaceEditor.js(69,33): error TS2694: Namespace 'UI.InplaceEditor' has no exported member 'Controller'.
 node_modules/chrome-devtools-frontend/front_end/ui/InplaceEditor.js(131,22): error TS2339: Property 'keyCode' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/ui/InplaceEditor.js(131,77): error TS2339: Property 'key' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/ui/InplaceEditor.js(133,22): error TS2339: Property 'key' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/ui/InplaceEditor.js(134,33): error TS2339: Property 'shiftKey' does not exist on type 'Event'.
-node_modules/chrome-devtools-frontend/front_end/ui/InplaceEditor.js(184,2): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/ui/InplaceEditor.js(185,18): error TS2339: Property 'Controller' does not exist on type 'typeof InplaceEditor'.
 node_modules/chrome-devtools-frontend/front_end/ui/InspectorView.js(53,50): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/ui/InspectorView.js(55,61): error TS2345: Argument of type 'ToolbarButton' is not assignable to parameter of type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
   Type 'ToolbarButton' is not assignable to type '{ [x: string]: any; item(): any & any; }'.
     Property 'item' is missing in type 'ToolbarButton'.
-node_modules/chrome-devtools-frontend/front_end/ui/InspectorView.js(62,31): error TS2339: Property 'bringToFront' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/ui/InspectorView.js(62,31): error TS2339: Property 'bringToFront' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/ui/InspectorView.js(69,40): error TS2555: Expected at least 2 arguments, but got 1.
+node_modules/chrome-devtools-frontend/front_end/ui/InspectorView.js(76,27): error TS2551: Property 'events' does not exist on type 'typeof InspectorFrontendHostAPI'. Did you mean 'Events'?
 node_modules/chrome-devtools-frontend/front_end/ui/InspectorView.js(80,24): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/ui/InspectorView.js(92,51): error TS2339: Property 'runtime' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/ui/InspectorView.js(116,7): error TS2322: Type '{ [x: string]: any; tabbedPane(): TabbedPane; enableMoreTabsButton(): void; }' is not assignable to type '{ [x: string]: any; appendApplicableItems(locationName: string): void; appendView(view: { [x: str...'.
 node_modules/chrome-devtools-frontend/front_end/ui/InspectorView.js(116,7): error TS2322: Type '{ [x: string]: any; tabbedPane(): TabbedPane; enableMoreTabsButton(): void; }' is not assignable to type '{ [x: string]: any; appendApplicableItems(locationName: string): void; appendView(view: { [x: str...'.
   Property 'appendApplicableItems' is missing in type '{ [x: string]: any; tabbedPane(): TabbedPane; enableMoreTabsButton(): void; }'.
 node_modules/chrome-devtools-frontend/front_end/ui/InspectorView.js(118,7): error TS2322: Type '{ [x: string]: any; tabbedPane(): TabbedPane; enableMoreTabsButton(): void; }' is not assignable to type '{ [x: string]: any; appendApplicableItems(locationName: string): void; appendView(view: { [x: str...'.
-  Property 'appendApplicableItems' is missing in type '{ [x: string]: any; tabbedPane(): TabbedPane; enableMoreTabsButton(): void; }'.
 node_modules/chrome-devtools-frontend/front_end/ui/InspectorView.js(118,7): error TS2322: Type '{ [x: string]: any; tabbedPane(): TabbedPane; enableMoreTabsButton(): void; }' is not assignable to type '{ [x: string]: any; appendApplicableItems(locationName: string): void; appendView(view: { [x: str...'.
+  Property 'appendApplicableItems' is missing in type '{ [x: string]: any; tabbedPane(): TabbedPane; enableMoreTabsButton(): void; }'.
 node_modules/chrome-devtools-frontend/front_end/ui/InspectorView.js(247,73): error TS2339: Property 'altKey' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/ui/InspectorView.js(247,89): error TS2339: Property 'shiftKey' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/ui/InspectorView.js(254,17): error TS2339: Property 'keyCode' does not exist on type 'Event'.
@@ -14630,15 +14058,13 @@ node_modules/chrome-devtools-frontend/front_end/ui/KeyboardShortcut.js(91,19): e
 node_modules/chrome-devtools-frontend/front_end/ui/KeyboardShortcut.js(91,37): error TS2339: Property 'shiftKey' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/ui/KeyboardShortcut.js(91,56): error TS2339: Property 'altKey' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/ui/KeyboardShortcut.js(91,73): error TS2339: Property 'metaKey' does not exist on type 'Event'.
-node_modules/chrome-devtools-frontend/front_end/ui/KeyboardShortcut.js(95,42): error TS2694: Namespace 'KeyboardShortcut' has no exported member 'Key'.
-node_modules/chrome-devtools-frontend/front_end/ui/KeyboardShortcut.js(97,36): error TS2694: Namespace 'KeyboardShortcut' has no exported member 'Descriptor'.
-node_modules/chrome-devtools-frontend/front_end/ui/KeyboardShortcut.js(108,36): error TS2694: Namespace 'KeyboardShortcut' has no exported member 'Descriptor'.
-node_modules/chrome-devtools-frontend/front_end/ui/KeyboardShortcut.js(135,42): error TS2694: Namespace 'KeyboardShortcut' has no exported member 'Key'.
-node_modules/chrome-devtools-frontend/front_end/ui/KeyboardShortcut.js(144,42): error TS2694: Namespace 'KeyboardShortcut' has no exported member 'Key'.
-node_modules/chrome-devtools-frontend/front_end/ui/KeyboardShortcut.js(215,73): error TS1003: Identifier expected.
+node_modules/chrome-devtools-frontend/front_end/ui/KeyboardShortcut.js(95,42): error TS2694: Namespace 'UI.KeyboardShortcut' has no exported member 'Key'.
+node_modules/chrome-devtools-frontend/front_end/ui/KeyboardShortcut.js(97,36): error TS2694: Namespace 'UI.KeyboardShortcut' has no exported member 'Descriptor'.
+node_modules/chrome-devtools-frontend/front_end/ui/KeyboardShortcut.js(108,36): error TS2694: Namespace 'UI.KeyboardShortcut' has no exported member 'Descriptor'.
+node_modules/chrome-devtools-frontend/front_end/ui/KeyboardShortcut.js(135,42): error TS2694: Namespace 'UI.KeyboardShortcut' has no exported member 'Key'.
+node_modules/chrome-devtools-frontend/front_end/ui/KeyboardShortcut.js(144,42): error TS2694: Namespace 'UI.KeyboardShortcut' has no exported member 'Key'.
 node_modules/chrome-devtools-frontend/front_end/ui/KeyboardShortcut.js(216,21): error TS2551: Property 'Key' does not exist on type 'typeof KeyboardShortcut'. Did you mean 'Keys'?
-node_modules/chrome-devtools-frontend/front_end/ui/KeyboardShortcut.js(218,50): error TS2694: Namespace 'KeyboardShortcut' has no exported member 'Key'.
-node_modules/chrome-devtools-frontend/front_end/ui/KeyboardShortcut.js(288,45): error TS1003: Identifier expected.
+node_modules/chrome-devtools-frontend/front_end/ui/KeyboardShortcut.js(218,50): error TS2694: Namespace 'UI.KeyboardShortcut' has no exported member 'Key'.
 node_modules/chrome-devtools-frontend/front_end/ui/KeyboardShortcut.js(289,21): error TS2300: Duplicate identifier 'Descriptor'.
 node_modules/chrome-devtools-frontend/front_end/ui/KeyboardShortcut.js(289,21): error TS2339: Property 'Descriptor' does not exist on type 'typeof KeyboardShortcut'.
 node_modules/chrome-devtools-frontend/front_end/ui/ListControl.js(14,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
@@ -14692,14 +14118,13 @@ node_modules/chrome-devtools-frontend/front_end/ui/ListWidget.js(324,35): error
 node_modules/chrome-devtools-frontend/front_end/ui/ListWidget.js(341,34): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/ui/ListWidget.js(341,34): error TS8024: JSDoc '@param' tag has name '', but there is no parameter with that name.
 node_modules/chrome-devtools-frontend/front_end/ui/ListWidget.js(341,35): error TS1138: Parameter declaration expected.
+node_modules/chrome-devtools-frontend/front_end/ui/ListWidget.js(347,27): error TS2339: Property 'createChild' does not exist on type 'HTMLSelectElement'.
 node_modules/chrome-devtools-frontend/front_end/ui/ListWidget.js(376,7): error TS2362: The left-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type.
 node_modules/chrome-devtools-frontend/front_end/ui/ListWidget.js(378,24): error TS2339: Property 'disabled' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/ui/ListWidget.js(395,18): error TS2339: Property 'scrollIntoViewIfNeeded' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/ui/ListWidget.js(402,28): error TS2339: Property 'disabled' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/ui/Panel.js(29,4): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
-node_modules/chrome-devtools-frontend/front_end/ui/Panel.js(44,8): error TS2551: Property 'panels' does not exist on type 'typeof UI'. Did you mean 'Panel'?
 node_modules/chrome-devtools-frontend/front_end/ui/Panel.js(75,13): error TS2339: Property 'handled' does not exist on type 'KeyboardEvent'.
-node_modules/chrome-devtools-frontend/front_end/ui/Panel.js(79,43): error TS2694: Namespace 'KeyboardShortcut' has no exported member 'Descriptor'.
+node_modules/chrome-devtools-frontend/front_end/ui/Panel.js(79,43): error TS2694: Namespace 'UI.KeyboardShortcut' has no exported member 'Descriptor'.
 node_modules/chrome-devtools-frontend/front_end/ui/Popover.js(37,40): error TS2694: Namespace 'UI' has no exported member 'PopoverRequest'.
 node_modules/chrome-devtools-frontend/front_end/ui/Popover.js(80,79): error TS2339: Property 'clientX' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/ui/Popover.js(80,94): error TS2339: Property 'clientY' does not exist on type 'Event'.
@@ -14713,8 +14138,6 @@ node_modules/chrome-devtools-frontend/front_end/ui/Popover.js(220,28): error TS2
 node_modules/chrome-devtools-frontend/front_end/ui/Popover.js(222,26): error TS2339: Property '_popoverHelper' does not exist on type 'typeof PopoverHelper'.
 node_modules/chrome-devtools-frontend/front_end/ui/Popover.js(224,24): error TS2339: Property '_popoverHelper' does not exist on type 'typeof PopoverHelper'.
 node_modules/chrome-devtools-frontend/front_end/ui/Popover.js(236,33): error TS2339: Property '_popoverHelper' does not exist on type 'typeof PopoverHelper'.
-node_modules/chrome-devtools-frontend/front_end/ui/Popover.js(253,113): error TS1003: Identifier expected.
-node_modules/chrome-devtools-frontend/front_end/ui/Popover.js(254,4): error TS2339: Property 'PopoverRequest' does not exist on type 'typeof UI'.
 node_modules/chrome-devtools-frontend/front_end/ui/ProgressIndicator.js(38,45): error TS2339: Property 'createChild' does not exist on type 'DocumentFragment'.
 node_modules/chrome-devtools-frontend/front_end/ui/ReportView.js(15,44): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/ui/ReportView.js(118,40): error TS2339: Property 'createChild' does not exist on type 'Element'.
@@ -14774,10 +14197,10 @@ node_modules/chrome-devtools-frontend/front_end/ui/SettingsUI.js(107,25): error
 node_modules/chrome-devtools-frontend/front_end/ui/SettingsUI.js(119,27): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/ui/SettingsUI.js(133,17): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/ui/SettingsUI.js(155,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
-node_modules/chrome-devtools-frontend/front_end/ui/ShortcutRegistry.js(16,56): error TS2694: Namespace 'KeyboardShortcut' has no exported member 'Descriptor'.
+node_modules/chrome-devtools-frontend/front_end/ui/ShortcutRegistry.js(16,56): error TS2694: Namespace 'UI.KeyboardShortcut' has no exported member 'Descriptor'.
 node_modules/chrome-devtools-frontend/front_end/ui/ShortcutRegistry.js(26,83): error TS2339: Property 'valuesArray' does not exist on type 'Set<string>'.
 node_modules/chrome-devtools-frontend/front_end/ui/ShortcutRegistry.js(34,38): error TS2339: Property 'get' does not exist on type 'Multimap'.
-node_modules/chrome-devtools-frontend/front_end/ui/ShortcutRegistry.js(39,44): error TS2694: Namespace 'KeyboardShortcut' has no exported member 'Descriptor'.
+node_modules/chrome-devtools-frontend/front_end/ui/ShortcutRegistry.js(39,44): error TS2694: Namespace 'UI.KeyboardShortcut' has no exported member 'Descriptor'.
 node_modules/chrome-devtools-frontend/front_end/ui/ShortcutRegistry.js(42,42): error TS2339: Property 'get' does not exist on type 'Multimap'.
 node_modules/chrome-devtools-frontend/front_end/ui/ShortcutRegistry.js(88,15): error TS2339: Property 'consume' does not exist on type 'KeyboardEvent'.
 node_modules/chrome-devtools-frontend/front_end/ui/ShortcutRegistry.js(94,15): error TS2339: Property 'consume' does not exist on type 'KeyboardEvent'.
@@ -14844,13 +14267,13 @@ node_modules/chrome-devtools-frontend/front_end/ui/ShortcutsScreen.js(222,20): e
 node_modules/chrome-devtools-frontend/front_end/ui/ShortcutsScreen.js(222,76): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/ui/ShortcutsScreen.js(223,37): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/ui/ShortcutsScreen.js(231,45): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/ui/ShortcutsScreen.js(257,35): error TS2694: Namespace 'KeyboardShortcut' has no exported member 'Descriptor'.
-node_modules/chrome-devtools-frontend/front_end/ui/ShortcutsScreen.js(265,43): error TS2694: Namespace 'KeyboardShortcut' has no exported member 'Descriptor'.
-node_modules/chrome-devtools-frontend/front_end/ui/ShortcutsScreen.js(273,43): error TS2694: Namespace 'KeyboardShortcut' has no exported member 'Descriptor'.
+node_modules/chrome-devtools-frontend/front_end/ui/ShortcutsScreen.js(257,35): error TS2694: Namespace 'UI.KeyboardShortcut' has no exported member 'Descriptor'.
+node_modules/chrome-devtools-frontend/front_end/ui/ShortcutsScreen.js(265,43): error TS2694: Namespace 'UI.KeyboardShortcut' has no exported member 'Descriptor'.
+node_modules/chrome-devtools-frontend/front_end/ui/ShortcutsScreen.js(273,43): error TS2694: Namespace 'UI.KeyboardShortcut' has no exported member 'Descriptor'.
 node_modules/chrome-devtools-frontend/front_end/ui/ShortcutsScreen.js(277,46): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/ui/ShortcutsScreen.js(292,28): error TS2339: Property 'createChild' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/ui/ShortcutsScreen.js(308,43): error TS2694: Namespace 'KeyboardShortcut' has no exported member 'Descriptor'.
-node_modules/chrome-devtools-frontend/front_end/ui/ShortcutsScreen.js(318,35): error TS2694: Namespace 'KeyboardShortcut' has no exported member 'Descriptor'.
+node_modules/chrome-devtools-frontend/front_end/ui/ShortcutsScreen.js(308,43): error TS2694: Namespace 'UI.KeyboardShortcut' has no exported member 'Descriptor'.
+node_modules/chrome-devtools-frontend/front_end/ui/ShortcutsScreen.js(318,35): error TS2694: Namespace 'UI.KeyboardShortcut' has no exported member 'Descriptor'.
 node_modules/chrome-devtools-frontend/front_end/ui/SoftContextMenu.js(31,48): error TS2694: Namespace 'InspectorFrontendHostAPI' has no exported member 'ContextMenuDescriptor'.
 node_modules/chrome-devtools-frontend/front_end/ui/SoftContextMenu.js(53,9): error TS2345: Argument of type 'symbol' is not assignable to parameter of type '{ [x: string]: any; BlockedByGlassPane: symbol; PierceGlassPane: symbol; PierceContents: symbol; }'.
 node_modules/chrome-devtools-frontend/front_end/ui/SoftContextMenu.js(57,37): error TS2345: Argument of type 'symbol' is not assignable to parameter of type '{ [x: string]: any; SetExactSize: symbol; SetExactWidthMaxHeight: symbol; MeasureContent: symbol; }'.
@@ -14872,7 +14295,9 @@ node_modules/chrome-devtools-frontend/front_end/ui/SoftDropDown.js(20,37): error
 node_modules/chrome-devtools-frontend/front_end/ui/SoftDropDown.js(25,39): error TS2345: Argument of type 'symbol' is not assignable to parameter of type 'boolean'.
 node_modules/chrome-devtools-frontend/front_end/ui/SoftDropDown.js(26,39): error TS2345: Argument of type 'symbol' is not assignable to parameter of type '{ [x: string]: any; PreferTop: symbol; PreferBottom: symbol; PreferLeft: symbol; PreferRight: sym...'.
 node_modules/chrome-devtools-frontend/front_end/ui/SoftDropDown.js(28,46): error TS2345: Argument of type 'symbol' is not assignable to parameter of type '{ [x: string]: any; BlockedByGlassPane: symbol; PierceGlassPane: symbol; PierceContents: symbol; }'.
-node_modules/chrome-devtools-frontend/front_end/ui/SoftDropDown.js(29,50): error TS2345: Argument of type 'symbol' is not assignable to parameter of type '{ [x: string]: any; NonViewport: symbol; EqualHeightItems: symbol; VariousHeightItems: symbol; }'.
+node_modules/chrome-devtools-frontend/front_end/ui/SoftDropDown.js(29,44): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; createElementForItem(item: T): Element; heightForItem(item: T): number; isIte...'.
+  Type 'SoftDropDown<T>' is not assignable to type '{ [x: string]: any; createElementForItem(item: T): Element; heightForItem(item: T): number; isIte...'.
+    Property '_delegate' does not exist on type '{ [x: string]: any; createElementForItem(item: T): Element; heightForItem(item: T): number; isIte...'.
 node_modules/chrome-devtools-frontend/front_end/ui/SoftDropDown.js(40,30): error TS2339: Property 'disabled' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/ui/SoftDropDown.js(64,54): error TS2339: Property 'boxInWindow' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/ui/SoftDropDown.js(69,18): error TS2339: Property 'focus' does not exist on type 'Element'.
@@ -14897,6 +14322,8 @@ node_modules/chrome-devtools-frontend/front_end/ui/SplitWidget.js(434,50): error
 node_modules/chrome-devtools-frontend/front_end/ui/SplitWidget.js(434,85): error TS2339: Property 'offsetWidth' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/ui/SplitWidget.js(542,25): error TS2339: Property 'style' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/ui/SplitWidget.js(553,25): error TS2339: Property 'style' does not exist on type 'Element'.
+node_modules/chrome-devtools-frontend/front_end/ui/SplitWidget.js(565,29): error TS2339: Property 'style' does not exist on type 'Element'.
+node_modules/chrome-devtools-frontend/front_end/ui/SplitWidget.js(579,56): error TS2339: Property 'window' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/ui/SplitWidget.js(582,54): error TS2339: Property 'window' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/ui/SplitWidget.js(586,25): error TS2339: Property 'style' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/ui/SplitWidget.js(587,25): error TS2339: Property 'style' does not exist on type 'Element'.
@@ -14909,34 +14336,33 @@ node_modules/chrome-devtools-frontend/front_end/ui/SplitWidget.js(654,21): error
 node_modules/chrome-devtools-frontend/front_end/ui/SplitWidget.js(715,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/ui/SplitWidget.js(722,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/ui/SplitWidget.js(740,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/ui/SplitWidget.js(788,31): error TS2694: Namespace 'SplitWidget' has no exported member 'SettingForOrientation'.
+node_modules/chrome-devtools-frontend/front_end/ui/SplitWidget.js(788,31): error TS2694: Namespace 'UI.SplitWidget' has no exported member 'SettingForOrientation'.
 node_modules/chrome-devtools-frontend/front_end/ui/SplitWidget.js(861,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/ui/SplitWidget.js(872,40): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/ui/SplitWidget.js(878,24): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/ui/SplitWidget.js(912,49): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/ui/SplitWidget.js(913,16): error TS2339: Property 'SettingForOrientation' does not exist on type 'typeof SplitWidget'.
-node_modules/chrome-devtools-frontend/front_end/ui/SuggestBox.js(69,45): error TS2694: Namespace 'SuggestBox' has no exported member 'Suggestion'.
-node_modules/chrome-devtools-frontend/front_end/ui/SuggestBox.js(71,47): error TS2694: Namespace 'SuggestBox' has no exported member 'Suggestion'.
-node_modules/chrome-devtools-frontend/front_end/ui/SuggestBox.js(72,56): error TS2345: Argument of type 'symbol' is not assignable to parameter of type '{ [x: string]: any; NonViewport: symbol; EqualHeightItems: symbol; VariousHeightItems: symbol; }'.
+node_modules/chrome-devtools-frontend/front_end/ui/SuggestBox.js(69,45): error TS2694: Namespace 'UI.SuggestBox' has no exported member 'Suggestion'.
+node_modules/chrome-devtools-frontend/front_end/ui/SuggestBox.js(71,47): error TS2694: Namespace 'UI.SuggestBox' has no exported member 'Suggestion'.
+node_modules/chrome-devtools-frontend/front_end/ui/SuggestBox.js(72,50): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; createElementForItem(item: T): Element; heightForItem(item: T): number; isIte...'.
+  Type 'SuggestBox' is not assignable to type '{ [x: string]: any; createElementForItem(item: T): Element; heightForItem(item: T): number; isIte...'.
+    Property '_suggestBoxDelegate' does not exist on type '{ [x: string]: any; createElementForItem(item: T): Element; heightForItem(item: T): number; isIte...'.
 node_modules/chrome-devtools-frontend/front_end/ui/SuggestBox.js(79,39): error TS2345: Argument of type 'symbol' is not assignable to parameter of type '{ [x: string]: any; PreferTop: symbol; PreferBottom: symbol; PreferLeft: symbol; PreferRight: sym...'.
-node_modules/chrome-devtools-frontend/front_end/ui/SuggestBox.js(116,29): error TS2694: Namespace 'SuggestBox' has no exported member 'Suggestions'.
-node_modules/chrome-devtools-frontend/front_end/ui/SuggestBox.js(126,29): error TS2694: Namespace 'SuggestBox' has no exported member 'Suggestions'.
-node_modules/chrome-devtools-frontend/front_end/ui/SuggestBox.js(142,71): error TS2694: Namespace 'SuggestBox' has no exported member 'Suggestion'.
-node_modules/chrome-devtools-frontend/front_end/ui/SuggestBox.js(202,29): error TS2694: Namespace 'SuggestBox' has no exported member 'Suggestion'.
+node_modules/chrome-devtools-frontend/front_end/ui/SuggestBox.js(116,29): error TS2694: Namespace 'UI.SuggestBox' has no exported member 'Suggestions'.
+node_modules/chrome-devtools-frontend/front_end/ui/SuggestBox.js(126,29): error TS2694: Namespace 'UI.SuggestBox' has no exported member 'Suggestions'.
+node_modules/chrome-devtools-frontend/front_end/ui/SuggestBox.js(142,71): error TS2694: Namespace 'UI.SuggestBox' has no exported member 'Suggestion'.
+node_modules/chrome-devtools-frontend/front_end/ui/SuggestBox.js(202,29): error TS2694: Namespace 'UI.SuggestBox' has no exported member 'Suggestion'.
 node_modules/chrome-devtools-frontend/front_end/ui/SuggestBox.js(214,13): error TS2339: Property 'tabIndex' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/ui/SuggestBox.js(218,32): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/ui/SuggestBox.js(227,37): error TS2339: Property 'createChild' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/ui/SuggestBox.js(235,29): error TS2694: Namespace 'SuggestBox' has no exported member 'Suggestion'.
-node_modules/chrome-devtools-frontend/front_end/ui/SuggestBox.js(244,29): error TS2694: Namespace 'SuggestBox' has no exported member 'Suggestion'.
-node_modules/chrome-devtools-frontend/front_end/ui/SuggestBox.js(253,29): error TS2694: Namespace 'SuggestBox' has no exported member 'Suggestion'.
-node_modules/chrome-devtools-frontend/front_end/ui/SuggestBox.js(254,29): error TS2694: Namespace 'SuggestBox' has no exported member 'Suggestion'.
+node_modules/chrome-devtools-frontend/front_end/ui/SuggestBox.js(235,29): error TS2694: Namespace 'UI.SuggestBox' has no exported member 'Suggestion'.
+node_modules/chrome-devtools-frontend/front_end/ui/SuggestBox.js(244,29): error TS2694: Namespace 'UI.SuggestBox' has no exported member 'Suggestion'.
+node_modules/chrome-devtools-frontend/front_end/ui/SuggestBox.js(253,29): error TS2694: Namespace 'UI.SuggestBox' has no exported member 'Suggestion'.
+node_modules/chrome-devtools-frontend/front_end/ui/SuggestBox.js(254,29): error TS2694: Namespace 'UI.SuggestBox' has no exported member 'Suggestion'.
 node_modules/chrome-devtools-frontend/front_end/ui/SuggestBox.js(282,11): error TS2339: Property 'consume' does not exist on type 'Event'.
-node_modules/chrome-devtools-frontend/front_end/ui/SuggestBox.js(286,29): error TS2694: Namespace 'SuggestBox' has no exported member 'Suggestions'.
-node_modules/chrome-devtools-frontend/front_end/ui/SuggestBox.js(307,29): error TS2694: Namespace 'SuggestBox' has no exported member 'Suggestions'.
-node_modules/chrome-devtools-frontend/front_end/ui/SuggestBox.js(393,2): error TS1003: Identifier expected.
+node_modules/chrome-devtools-frontend/front_end/ui/SuggestBox.js(286,29): error TS2694: Namespace 'UI.SuggestBox' has no exported member 'Suggestions'.
+node_modules/chrome-devtools-frontend/front_end/ui/SuggestBox.js(307,29): error TS2694: Namespace 'UI.SuggestBox' has no exported member 'Suggestions'.
 node_modules/chrome-devtools-frontend/front_end/ui/SuggestBox.js(394,15): error TS2339: Property 'Suggestion' does not exist on type 'typeof SuggestBox'.
-node_modules/chrome-devtools-frontend/front_end/ui/SuggestBox.js(397,36): error TS2694: Namespace 'SuggestBox' has no exported member 'Suggestion'.
-node_modules/chrome-devtools-frontend/front_end/ui/SuggestBox.js(398,2): error TS1003: Identifier expected.
+node_modules/chrome-devtools-frontend/front_end/ui/SuggestBox.js(397,36): error TS2694: Namespace 'UI.SuggestBox' has no exported member 'Suggestion'.
 node_modules/chrome-devtools-frontend/front_end/ui/SuggestBox.js(399,15): error TS2339: Property 'Suggestions' does not exist on type 'typeof SuggestBox'.
 node_modules/chrome-devtools-frontend/front_end/ui/SyntaxHighlighter.js(54,10): error TS2339: Property 'createTextChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/ui/SyntaxHighlighter.js(67,17): error TS2339: Property 'runtime' does not exist on type 'Window'.
@@ -14994,7 +14420,7 @@ node_modules/chrome-devtools-frontend/front_end/ui/TabbedPane.js(1248,24): error
 node_modules/chrome-devtools-frontend/front_end/ui/TabbedPane.js(1252,22): error TS2339: Property 'style' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/ui/TabbedPane.js(1252,55): error TS2339: Property 'pageX' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/ui/TabbedPane.js(1260,22): error TS2339: Property 'style' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/ui/TextEditor.js(11,29): error TS2694: Namespace 'TextEditor' has no exported member 'Options'.
+node_modules/chrome-devtools-frontend/front_end/ui/TextEditor.js(11,29): error TS2694: Namespace 'UI.TextEditor' has no exported member 'Options'.
 node_modules/chrome-devtools-frontend/front_end/ui/TextEditor.js(12,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 node_modules/chrome-devtools-frontend/front_end/ui/TextEditor.js(21,1): error TS8022: JSDoc '@extends' is not attached to a class.
 node_modules/chrome-devtools-frontend/front_end/ui/TextEditor.js(26,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
@@ -15006,20 +14432,20 @@ node_modules/chrome-devtools-frontend/front_end/ui/TextEditor.js(70,18): error T
 node_modules/chrome-devtools-frontend/front_end/ui/TextEditor.js(79,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 node_modules/chrome-devtools-frontend/front_end/ui/TextEditor.js(91,2): error TS1131: Property or signature expected.
 node_modules/chrome-devtools-frontend/front_end/ui/TextEditor.js(101,15): error TS2300: Duplicate identifier 'Options'.
-node_modules/chrome-devtools-frontend/front_end/ui/TextEditor.js(101,15): error TS2339: Property 'Options' does not exist on type '{ (): void; Events: { [x: string]: any; TextChanged: symbol; }; }'.
+node_modules/chrome-devtools-frontend/front_end/ui/TextEditor.js(101,15): error TS2339: Property 'Options' does not exist on type '{ (): void; prototype: { [x: string]: any; }; Events: { [x: string]: any; TextChanged: symbol; }; }'.
 node_modules/chrome-devtools-frontend/front_end/ui/TextEditor.js(105,2): error TS1131: Property or signature expected.
-node_modules/chrome-devtools-frontend/front_end/ui/TextEditor.js(111,4): error TS2339: Property 'AutocompleteConfig' does not exist on type 'typeof UI'.
-node_modules/chrome-devtools-frontend/front_end/ui/TextPrompt.js(52,74): error TS2694: Namespace 'SuggestBox' has no exported member 'Suggestions'.
+node_modules/chrome-devtools-frontend/front_end/ui/TextPrompt.js(52,74): error TS2694: Namespace 'UI.SuggestBox' has no exported member 'Suggestions'.
 node_modules/chrome-devtools-frontend/front_end/ui/TextPrompt.js(113,39): error TS2339: Property 'createChild' does not exist on type 'DocumentFragment'.
 node_modules/chrome-devtools-frontend/front_end/ui/TextPrompt.js(115,24): error TS2339: Property 'style' does not exist on type 'Element'.
+node_modules/chrome-devtools-frontend/front_end/ui/TextPrompt.js(127,42): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; applySuggestion(suggestion: string, isIntermediateSuggestion?: boolean): void...'.
+  Type 'TextPrompt' is not assignable to type '{ [x: string]: any; applySuggestion(suggestion: string, isIntermediateSuggestion?: boolean): void...'.
+    Property '_proxyElement' does not exist on type '{ [x: string]: any; applySuggestion(suggestion: string, isIntermediateSuggestion?: boolean): void...'.
 node_modules/chrome-devtools-frontend/front_end/ui/TextPrompt.js(130,26): error TS2339: Property 'title' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/ui/TextPrompt.js(194,26): error TS2339: Property 'title' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/ui/TextPrompt.js(240,39): error TS2339: Property 'tabIndex' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/ui/TextPrompt.js(241,23): error TS2339: Property 'tabIndex' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/ui/TextPrompt.js(242,21): error TS2339: Property 'tabIndex' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/ui/TextPrompt.js(249,19): error TS2339: Property 'tabIndex' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/ui/TextPrompt.js(268,68): error TS2345: Argument of type 'Event' is not assignable to parameter of type 'KeyboardEvent'.
-  Property 'altKey' is missing in type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/ui/TextPrompt.js(269,13): error TS2339: Property 'consume' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/ui/TextPrompt.js(273,19): error TS2339: Property 'key' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/ui/TextPrompt.js(299,19): error TS2339: Property 'ctrlKey' does not exist on type 'Event'.
@@ -15029,8 +14455,8 @@ node_modules/chrome-devtools-frontend/front_end/ui/TextPrompt.js(299,72): error
 node_modules/chrome-devtools-frontend/front_end/ui/TextPrompt.js(309,13): error TS2339: Property 'consume' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/ui/TextPrompt.js(389,35): error TS2339: Property 'getComponentSelection' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/ui/TextPrompt.js(437,29): error TS2339: Property 'boxInWindow' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/ui/TextPrompt.js(454,30): error TS2694: Namespace 'SuggestBox' has no exported member 'Suggestions'.
-node_modules/chrome-devtools-frontend/front_end/ui/TextPrompt.js(466,29): error TS2694: Namespace 'SuggestBox' has no exported member 'Suggestions'.
+node_modules/chrome-devtools-frontend/front_end/ui/TextPrompt.js(454,30): error TS2694: Namespace 'UI.SuggestBox' has no exported member 'Suggestions'.
+node_modules/chrome-devtools-frontend/front_end/ui/TextPrompt.js(466,29): error TS2694: Namespace 'UI.SuggestBox' has no exported member 'Suggestions'.
 node_modules/chrome-devtools-frontend/front_end/ui/TextPrompt.js(564,35): error TS2339: Property 'getComponentSelection' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/ui/TextPrompt.js(580,35): error TS2339: Property 'getComponentSelection' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/ui/TextPrompt.js(592,35): error TS2339: Property 'getComponentSelection' does not exist on type 'Element'.
@@ -15038,8 +14464,8 @@ node_modules/chrome-devtools-frontend/front_end/ui/TextPrompt.js(601,32): error
 node_modules/chrome-devtools-frontend/front_end/ui/TextPrompt.js(610,54): error TS2339: Property 'isAncestor' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/ui/TextPrompt.js(622,35): error TS2339: Property 'getComponentSelection' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/ui/TextPrompt.js(627,7): error TS2322: Type 'Node' is not assignable to type 'Element'.
-  Property 'assignedSlot' is missing in type 'Node'.
 node_modules/chrome-devtools-frontend/front_end/ui/TextPrompt.js(627,7): error TS2322: Type 'Node' is not assignable to type 'Element'.
+  Property 'assignedSlot' is missing in type 'Node'.
 node_modules/chrome-devtools-frontend/front_end/ui/Toolbar.js(43,50): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/ui/Toolbar.js(48,45): error TS2339: Property 'createChild' does not exist on type 'DocumentFragment'.
 node_modules/chrome-devtools-frontend/front_end/ui/Toolbar.js(75,24): error TS2694: Namespace 'Common' has no exported member 'Event'.
@@ -15060,14 +14486,14 @@ node_modules/chrome-devtools-frontend/front_end/ui/Toolbar.js(318,56): error TS2
 node_modules/chrome-devtools-frontend/front_end/ui/Toolbar.js(328,27): error TS2339: Property 'runtime' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/ui/Toolbar.js(343,36): error TS2352: Type 'ToolbarSeparator' cannot be converted to type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
   Type 'ToolbarSeparator' is not comparable to type '{ [x: string]: any; item(): any & any; }'.
-    Property 'item' is missing in type 'ToolbarSeparator'.
 node_modules/chrome-devtools-frontend/front_end/ui/Toolbar.js(343,36): error TS2352: Type 'ToolbarSeparator' cannot be converted to type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
   Type 'ToolbarSeparator' is not comparable to type '{ [x: string]: any; item(): any & any; }'.
+    Property 'item' is missing in type 'ToolbarSeparator'.
 node_modules/chrome-devtools-frontend/front_end/ui/Toolbar.js(346,17): error TS2352: Type 'ToolbarToggle' cannot be converted to type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
   Type 'ToolbarToggle' is not comparable to type '{ [x: string]: any; item(): any & any; }'.
+    Property 'item' is missing in type 'ToolbarToggle'.
 node_modules/chrome-devtools-frontend/front_end/ui/Toolbar.js(346,17): error TS2352: Type 'ToolbarToggle' cannot be converted to type '{ [x: string]: any; item(): any & any; } & { [x: string]: any; item(): any & any; }'.
   Type 'ToolbarToggle' is not comparable to type '{ [x: string]: any; item(): any & any; }'.
-    Property 'item' is missing in type 'ToolbarToggle'.
 node_modules/chrome-devtools-frontend/front_end/ui/Toolbar.js(405,53): error TS2339: Property '_toolbar' does not exist on type 'ToolbarItem'.
 node_modules/chrome-devtools-frontend/front_end/ui/Toolbar.js(405,70): error TS2339: Property '_toolbar' does not exist on type 'ToolbarItem'.
 node_modules/chrome-devtools-frontend/front_end/ui/Toolbar.js(412,18): error TS2339: Property 'disabled' does not exist on type 'Element'.
@@ -15077,7 +14503,7 @@ node_modules/chrome-devtools-frontend/front_end/ui/Toolbar.js(484,38): error TS2
 node_modules/chrome-devtools-frontend/front_end/ui/Toolbar.js(520,18): error TS2339: Property 'style' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/ui/Toolbar.js(535,20): error TS2339: Property 'style' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/ui/Toolbar.js(545,11): error TS2339: Property 'consume' does not exist on type 'Event'.
-node_modules/chrome-devtools-frontend/front_end/ui/Toolbar.js(579,74): error TS2694: Namespace 'SuggestBox' has no exported member 'Suggestions'.
+node_modules/chrome-devtools-frontend/front_end/ui/Toolbar.js(579,74): error TS2694: Namespace 'UI.SuggestBox' has no exported member 'Suggestions'.
 node_modules/chrome-devtools-frontend/front_end/ui/Toolbar.js(584,46): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/ui/Toolbar.js(599,20): error TS2339: Property 'style' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/ui/Toolbar.js(601,20): error TS2339: Property 'style' does not exist on type 'Element'.
@@ -15105,8 +14531,6 @@ node_modules/chrome-devtools-frontend/front_end/ui/Tooltip.js(134,24): error TS2
 node_modules/chrome-devtools-frontend/front_end/ui/Tooltip.js(135,17): error TS2339: Property 'y' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/ui/Tooltip.js(136,17): error TS2339: Property 'y' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/ui/Tooltip.js(178,17): error TS2304: Cannot find name 'ObjectPropertyDescriptor'.
-node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(31,4): error TS2339: Property 'highlightedSearchResultClassName' does not exist on type 'typeof UI'.
-node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(32,4): error TS2339: Property 'highlightedCurrentSearchResultClassName' does not exist on type 'typeof UI'.
 node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(69,13): error TS2339: Property 'style' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(98,22): error TS2339: Property '_glassPane' does not exist on type 'typeof DragHandler'.
 node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(99,22): error TS2339: Property '_glassPane' does not exist on type 'typeof DragHandler'.
@@ -15127,18 +14551,13 @@ node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(172,25): error TS2
 node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(174,20): error TS2339: Property '_documentForMouseOut' does not exist on type 'typeof DragHandler'.
 node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(192,15): error TS2339: Property 'buttons' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(238,15): error TS2339: Property 'classList' does not exist on type 'Node'.
-node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(241,11): error TS2339: Property '__editingCount' does not exist on type 'typeof UI'.
 node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(245,17): error TS2339: Property '__editing' does not exist on type 'Node'.
 node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(247,23): error TS2339: Property 'parentElementOrShadowHost' does not exist on type 'Node'.
-node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(257,10): error TS2339: Property '__editingCount' does not exist on type 'typeof UI'.
 node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(260,26): error TS2339: Property 'deepActiveElement' does not exist on type 'Document'.
 node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(273,17): error TS2339: Property '__editing' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(276,13): error TS2339: Property '__editing' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(277,8): error TS2339: Property '__editingCount' does not exist on type 'typeof UI'.
-node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(277,29): error TS2339: Property '__editingCount' does not exist on type 'typeof UI'.
 node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(279,18): error TS2339: Property '__editing' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(282,20): error TS2339: Property '__editing' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(283,10): error TS2339: Property '__editingCount' does not exist on type 'typeof UI'.
 node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(300,15): error TS2339: Property 'wheelDeltaY' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(300,40): error TS2339: Property 'wheelDeltaX' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(302,20): error TS2339: Property 'wheelDeltaY' does not exist on type 'Event'.
@@ -15171,17 +14590,12 @@ node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(660,32): error TS2
 node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(662,10): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(699,28): error TS2339: Property 'createShadowRoot' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(714,20): error TS2339: Property 'document' does not exist on type 'EventTarget'.
-node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(716,6): error TS2339: Property '_keyboardFocus' does not exist on type 'typeof UI'.
 node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(718,34): error TS2339: Property 'deepActiveElement' does not exist on type 'Document'.
-node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(721,8): error TS2339: Property '_keyboardFocus' does not exist on type 'typeof UI'.
-node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(724,8): error TS2339: Property '_keyboardFocus' does not exist on type 'typeof UI'.
 node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(736,20): error TS2339: Property 'document' does not exist on type 'EventTarget'.
 node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(744,47): error TS2339: Property 'ownerDocument' does not exist on type 'EventTarget'.
-node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(748,11): error TS2339: Property '_keyboardFocus' does not exist on type 'typeof UI'.
 node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(763,44): error TS2339: Property 'deepActiveElement' does not exist on type 'Document'.
 node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(764,13): error TS2339: Property 'focus' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(770,23): error TS2339: Property 'hasFocus' does not exist on type 'Element'.
-node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(796,69): error TS2339: Property 'highlightedSearchResultClassName' does not exist on type 'typeof UI'.
 node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(826,27): error TS2339: Property 'childTextNodes' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(943,11): error TS2339: Property 'positionAt' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(946,11): error TS2339: Property 'positionAt' does not exist on type 'Element'.
@@ -15192,9 +14606,8 @@ node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(1089,14): error TS
 node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(1090,26): error TS2339: Property '_longClickInterval' does not exist on type 'LongClickController'.
 node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(1091,19): error TS2339: Property '_longClickInterval' does not exist on type 'LongClickController'.
 node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(1114,13): error TS2339: Property 'which' does not exist on type 'Event'.
+node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(1117,12): error TS2339: Property '_longClickInterval' does not exist on type 'LongClickController'.
 node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(1125,13): error TS2339: Property 'which' does not exist on type 'Event'.
-node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(1152,8): error TS2339: Property '_keyboardFocus' does not exist on type 'typeof UI'.
-node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(1153,62): error TS2339: Property '_keyboardFocus' does not exist on type 'typeof UI'.
 node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(1170,18): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(1182,19): error TS2551: Property 'registerElement' does not exist on type 'Document'. Did you mean 'createElement'?
 node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(1209,11): error TS2339: Property 'spellcheck' does not exist on type 'Element'.
@@ -15224,6 +14637,10 @@ node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(1324,29): error TS
 node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(1367,12): error TS2339: Property 'createChild' does not exist on type 'DocumentFragment'.
 node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(1381,12): error TS2339: Property 'createChild' does not exist on type 'DocumentFragment'.
 node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(1382,12): error TS2339: Property 'createChild' does not exist on type 'DocumentFragment'.
+node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(1395,14): error TS2339: Property 'radioElement' does not exist on type 'Element'.
+node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(1395,43): error TS2339: Property 'radioElement' does not exist on type 'Element'.
+node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(1397,10): error TS2339: Property 'radioElement' does not exist on type 'Element'.
+node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(1398,10): error TS2339: Property 'radioElement' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(1410,12): error TS2339: Property 'createChild' does not exist on type 'DocumentFragment'.
 node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(1459,32): error TS2339: Property 'createChild' does not exist on type 'DocumentFragment'.
 node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(1481,34): error TS2339: Property 'createChild' does not exist on type 'DocumentFragment'.
@@ -15249,9 +14666,9 @@ node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(1763,20): error TS
 node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(1766,52): error TS2339: Property 'sheet' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(1783,30): error TS2339: Property 'cssRules' does not exist on type 'StyleSheet'.
 node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(1851,49): error TS2345: Argument of type 'number' is not assignable to parameter of type '{ [x: string]: any; Unknown: number; Foreground: number; Background: number; Selection: number; }'.
-node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(1859,31): error TS2694: Namespace 'ThemeSupport' has no exported member 'ColorUsage'.
-node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(1875,31): error TS2694: Namespace 'ThemeSupport' has no exported member 'ColorUsage'.
-node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(1888,31): error TS2694: Namespace 'ThemeSupport' has no exported member 'ColorUsage'.
+node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(1859,31): error TS2694: Namespace 'UI.ThemeSupport' has no exported member 'ColorUsage'.
+node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(1875,31): error TS2694: Namespace 'UI.ThemeSupport' has no exported member 'ColorUsage'.
+node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(1888,31): error TS2694: Namespace 'UI.ThemeSupport' has no exported member 'ColorUsage'.
 node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(1898,13): error TS2362: The left-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type.
 node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(1900,22): error TS2362: The left-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type.
 node_modules/chrome-devtools-frontend/front_end/ui/UIUtils.js(1901,22): error TS2362: The left-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type.
@@ -15287,6 +14704,9 @@ node_modules/chrome-devtools-frontend/front_end/ui/View.js(21,15): error TS2355:
 node_modules/chrome-devtools-frontend/front_end/ui/View.js(26,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 node_modules/chrome-devtools-frontend/front_end/ui/View.js(31,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 node_modules/chrome-devtools-frontend/front_end/ui/View.js(36,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
+node_modules/chrome-devtools-frontend/front_end/ui/View.js(129,38): error TS2345: Argument of type 'this' is not assignable to parameter of type '{ [x: string]: any; viewId(): string; title(): string; isCloseable(): boolean; isTransient(): boo...'.
+  Type 'SimpleView' is not assignable to type '{ [x: string]: any; viewId(): string; title(): string; isCloseable(): boolean; isTransient(): boo...'.
+    Property '_title' does not exist on type '{ [x: string]: any; viewId(): string; title(): string; isCloseable(): boolean; isTransient(): boo...'.
 node_modules/chrome-devtools-frontend/front_end/ui/View.js(195,47): error TS2352: Type 'Widget' cannot be converted to type '{ [x: string]: any; toolbarItems(): ({ [x: string]: any; item(): any & any; } & { [x: string]: an...'.
   Property 'toolbarItems' is missing in type 'Widget'.
 node_modules/chrome-devtools-frontend/front_end/ui/View.js(244,15): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
@@ -15304,11 +14724,11 @@ node_modules/chrome-devtools-frontend/front_end/ui/View.js(361,25): error TS2538
 node_modules/chrome-devtools-frontend/front_end/ui/View.js(371,23): error TS2339: Property 'showView' does not exist on type '_Location'.
 node_modules/chrome-devtools-frontend/front_end/ui/View.js(383,35): error TS2339: Property 'runtime' does not exist on type 'Window'.
 node_modules/chrome-devtools-frontend/front_end/ui/View.js(401,5): error TS2322: Type '_TabbedLocation' is not assignable to type '{ [x: string]: any; tabbedPane(): TabbedPane; enableMoreTabsButton(): void; }'.
-  Property '_tabbedPane' does not exist on type '{ [x: string]: any; tabbedPane(): TabbedPane; enableMoreTabsButton(): void; }'.
 node_modules/chrome-devtools-frontend/front_end/ui/View.js(401,5): error TS2322: Type '_TabbedLocation' is not assignable to type '{ [x: string]: any; tabbedPane(): TabbedPane; enableMoreTabsButton(): void; }'.
-node_modules/chrome-devtools-frontend/front_end/ui/View.js(411,5): error TS2322: Type '_StackLocation' is not assignable to type '{ [x: string]: any; appendApplicableItems(locationName: string): void; appendView(view: { [x: str...'.
+  Property '_tabbedPane' does not exist on type '{ [x: string]: any; tabbedPane(): TabbedPane; enableMoreTabsButton(): void; }'.
 node_modules/chrome-devtools-frontend/front_end/ui/View.js(411,5): error TS2322: Type '_StackLocation' is not assignable to type '{ [x: string]: any; appendApplicableItems(locationName: string): void; appendView(view: { [x: str...'.
   Property '_vbox' does not exist on type '{ [x: string]: any; appendApplicableItems(locationName: string): void; appendView(view: { [x: str...'.
+node_modules/chrome-devtools-frontend/front_end/ui/View.js(411,5): error TS2322: Type '_StackLocation' is not assignable to type '{ [x: string]: any; appendApplicableItems(locationName: string): void; appendView(view: { [x: str...'.
 node_modules/chrome-devtools-frontend/front_end/ui/View.js(440,18): error TS2339: Property 'tabIndex' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/ui/View.js(454,38): error TS2339: Property 'hasFocus' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/ui/View.js(456,18): error TS2538: Type 'symbol' cannot be used as an index type.
@@ -15392,13 +14812,13 @@ node_modules/chrome-devtools-frontend/front_end/ui/XElement.js(131,1): error TS8
 node_modules/chrome-devtools-frontend/front_end/ui/XElement.js(141,1): error TS8022: JSDoc '@extends' is not attached to a class.
 node_modules/chrome-devtools-frontend/front_end/ui/XLink.js(8,1): error TS8022: JSDoc '@extends' is not attached to a class.
 node_modules/chrome-devtools-frontend/front_end/ui/XLink.js(22,31): error TS2345: Argument of type 'TemplateStringsArray' is not assignable to parameter of type 'string[]'.
-node_modules/chrome-devtools-frontend/front_end/ui/XLink.js(42,29): error TS2339: Property 'openInNewTab' does not exist on type 'typeof InspectorFrontendHost'.
-node_modules/chrome-devtools-frontend/front_end/ui/XLink.js(48,29): error TS2339: Property 'openInNewTab' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/ui/XLink.js(42,29): error TS2339: Property 'openInNewTab' does not exist on type 'typeof InspectorFrontendHostAPI'.
+node_modules/chrome-devtools-frontend/front_end/ui/XLink.js(48,29): error TS2339: Property 'openInNewTab' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/ui/XLink.js(115,31): error TS2339: Property 'parentNodeOrShadowHost' does not exist on type 'Node'.
 node_modules/chrome-devtools-frontend/front_end/ui/XLink.js(116,36): error TS2339: Property '_href' does not exist on type 'Node'.
-node_modules/chrome-devtools-frontend/front_end/ui/XLink.js(119,67): error TS2339: Property 'openInNewTab' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/ui/XLink.js(119,67): error TS2339: Property 'openInNewTab' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/ui/XLink.js(119,91): error TS2339: Property '_href' does not exist on type 'Node'.
-node_modules/chrome-devtools-frontend/front_end/ui/XLink.js(121,64): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/ui/XLink.js(121,64): error TS2339: Property 'copyText' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/ui/XLink.js(121,84): error TS2339: Property '_href' does not exist on type 'Node'.
 node_modules/chrome-devtools-frontend/front_end/ui/XWidget.js(8,1): error TS8022: JSDoc '@extends' is not attached to a class.
 node_modules/chrome-devtools-frontend/front_end/ui/XWidget.js(31,21): error TS2339: Property '_observer' does not exist on type 'typeof XWidget'.
@@ -15449,6 +14869,7 @@ node_modules/chrome-devtools-frontend/front_end/ui/treeoutline.js(281,22): error
 node_modules/chrome-devtools-frontend/front_end/ui/treeoutline.js(283,22): error TS2339: Property 'key' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/ui/treeoutline.js(288,13): error TS2339: Property 'consume' does not exist on type 'Event'.
 node_modules/chrome-devtools-frontend/front_end/ui/treeoutline.js(297,20): error TS2339: Property 'window' does not exist on type 'Element'.
+node_modules/chrome-devtools-frontend/front_end/ui/treeoutline.js(304,57): error TS2339: Property 'scrollIntoViewIfNeeded' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/ui/treeoutline.js(330,48): error TS2339: Property 'createChild' does not exist on type 'DocumentFragment'.
 node_modules/chrome-devtools-frontend/front_end/ui/treeoutline.js(369,45): error TS2339: Property 'createChild' does not exist on type 'Element'.
 node_modules/chrome-devtools-frontend/front_end/ui/treeoutline.js(370,24): error TS2339: Property 'treeElement' does not exist on type 'Element'.
@@ -15489,37 +14910,30 @@ node_modules/chrome-devtools-frontend/front_end/worker_service/ServiceDispatcher
 node_modules/chrome-devtools-frontend/front_end/worker_service/ServiceDispatcher.js(134,16): error TS2339: Property 'send' does not exist on type 'typeof ServicePort'.
 node_modules/chrome-devtools-frontend/front_end/worker_service/ServiceDispatcher.js(144,15): error TS2304: Cannot find name 'Port'.
 node_modules/chrome-devtools-frontend/front_end/worker_service/ServiceDispatcher.js(192,40): error TS2345: Argument of type 'WorkerServicePort' is not assignable to parameter of type 'typeof ServicePort'.
-  Type 'WorkerServicePort' provides no match for the signature '(): void'.
+  Property 'prototype' is missing in type 'WorkerServicePort'.
 node_modules/chrome-devtools-frontend/front_end/workspace/FileManager.js(37,29): error TS1005: '>' expected.
-node_modules/chrome-devtools-frontend/front_end/workspace/FileManager.js(54,27): error TS2339: Property 'save' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/workspace/FileManager.js(39,27): error TS2551: Property 'events' does not exist on type 'typeof InspectorFrontendHostAPI'. Did you mean 'Events'?
+node_modules/chrome-devtools-frontend/front_end/workspace/FileManager.js(40,27): error TS2551: Property 'events' does not exist on type 'typeof InspectorFrontendHostAPI'. Did you mean 'Events'?
+node_modules/chrome-devtools-frontend/front_end/workspace/FileManager.js(42,27): error TS2551: Property 'events' does not exist on type 'typeof InspectorFrontendHostAPI'. Did you mean 'Events'?
+node_modules/chrome-devtools-frontend/front_end/workspace/FileManager.js(54,27): error TS2339: Property 'save' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/workspace/FileManager.js(59,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/workspace/FileManager.js(70,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/workspace/FileManager.js(85,27): error TS2339: Property 'append' does not exist on type 'typeof InspectorFrontendHost'.
+node_modules/chrome-devtools-frontend/front_end/workspace/FileManager.js(85,27): error TS2339: Property 'append' does not exist on type 'typeof InspectorFrontendHostAPI'.
 node_modules/chrome-devtools-frontend/front_end/workspace/FileManager.js(96,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
-node_modules/chrome-devtools-frontend/front_end/workspace/SearchConfig.js(92,52): error TS2694: Namespace 'SearchConfig' has no exported member 'RegexQuery'.
+node_modules/chrome-devtools-frontend/front_end/workspace/SearchConfig.js(92,52): error TS2694: Namespace 'Workspace.SearchConfig' has no exported member 'RegexQuery'.
 node_modules/chrome-devtools-frontend/front_end/workspace/SearchConfig.js(164,20): error TS2339: Property 'regexSpecialCharacters' does not exist on type 'StringConstructor'.
-node_modules/chrome-devtools-frontend/front_end/workspace/SearchConfig.js(176,55): error TS1003: Identifier expected.
 node_modules/chrome-devtools-frontend/front_end/workspace/SearchConfig.js(177,24): error TS2339: Property 'RegexQuery' does not exist on type 'typeof SearchConfig'.
 node_modules/chrome-devtools-frontend/front_end/workspace/UISourceCode.js(45,25): error TS2339: Property 'asParsedURL' does not exist on type 'string'.
 node_modules/chrome-devtools-frontend/front_end/workspace/UISourceCode.js(136,14): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/workspace/UISourceCode.js(199,10): error TS2339: Property 'dispatchEventToListeners' does not exist on type 'UISourceCode'.
 node_modules/chrome-devtools-frontend/front_end/workspace/UISourceCode.js(298,26): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/chrome-devtools-frontend/front_end/workspace/UISourceCode.js(332,10): error TS2339: Property 'dispatchEventToListeners' does not exist on type 'UISourceCode'.
-node_modules/chrome-devtools-frontend/front_end/workspace/UISourceCode.js(408,10): error TS2339: Property 'dispatchEventToListeners' does not exist on type 'UISourceCode'.
 node_modules/chrome-devtools-frontend/front_end/workspace/UISourceCode.js(486,46): error TS2694: Namespace 'Workspace.UISourceCode.Message' has no exported member 'Level'.
 node_modules/chrome-devtools-frontend/front_end/workspace/UISourceCode.js(498,46): error TS2694: Namespace 'Workspace.UISourceCode.Message' has no exported member 'Level'.
-node_modules/chrome-devtools-frontend/front_end/workspace/UISourceCode.js(508,10): error TS2339: Property 'dispatchEventToListeners' does not exist on type 'UISourceCode'.
-node_modules/chrome-devtools-frontend/front_end/workspace/UISourceCode.js(517,12): error TS2339: Property 'dispatchEventToListeners' does not exist on type 'UISourceCode'.
-node_modules/chrome-devtools-frontend/front_end/workspace/UISourceCode.js(524,12): error TS2339: Property 'dispatchEventToListeners' does not exist on type 'UISourceCode'.
 node_modules/chrome-devtools-frontend/front_end/workspace/UISourceCode.js(546,23): error TS2339: Property 'set' does not exist on type 'Multimap'.
-node_modules/chrome-devtools-frontend/front_end/workspace/UISourceCode.js(547,10): error TS2339: Property 'dispatchEventToListeners' does not exist on type 'UISourceCode'.
 node_modules/chrome-devtools-frontend/front_end/workspace/UISourceCode.js(556,37): error TS2339: Property 'get' does not exist on type 'Multimap'.
 node_modules/chrome-devtools-frontend/front_end/workspace/UISourceCode.js(557,23): error TS2339: Property 'deleteAll' does not exist on type 'Multimap'.
-node_modules/chrome-devtools-frontend/front_end/workspace/UISourceCode.js(559,12): error TS2339: Property 'dispatchEventToListeners' does not exist on type 'UISourceCode'.
 node_modules/chrome-devtools-frontend/front_end/workspace/UISourceCode.js(567,50): error TS2339: Property 'valuesArray' does not exist on type 'Multimap'.
 node_modules/chrome-devtools-frontend/front_end/workspace/UISourceCode.js(573,44): error TS2339: Property 'valuesArray' does not exist on type 'Multimap'.
 node_modules/chrome-devtools-frontend/front_end/workspace/UISourceCode.js(574,23): error TS2339: Property 'clear' does not exist on type 'Multimap'.
-node_modules/chrome-devtools-frontend/front_end/workspace/UISourceCode.js(576,24): error TS2339: Property 'dispatchEventToListeners' does not exist on type 'UISourceCode'.
 node_modules/chrome-devtools-frontend/front_end/workspace/UISourceCode.js(584,50): error TS2339: Property 'get' does not exist on type 'Multimap'.
 node_modules/chrome-devtools-frontend/front_end/workspace/UISourceCode.js(668,46): error TS2694: Namespace 'Workspace.UISourceCode.Message' has no exported member 'Level'.
 node_modules/chrome-devtools-frontend/front_end/workspace/UISourceCode.js(687,47): error TS2694: Namespace 'Workspace.UISourceCode.Message' has no exported member 'Level'.
@@ -15560,8 +14974,6 @@ node_modules/chrome-devtools-frontend/front_end/workspace_diff/WorkspaceDiff.js(
 node_modules/chrome-devtools-frontend/front_end/workspace_diff/WorkspaceDiff.js(88,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/workspace_diff/WorkspaceDiff.js(96,22): error TS2694: Namespace 'Common' has no exported member 'Event'.
 node_modules/chrome-devtools-frontend/front_end/workspace_diff/WorkspaceDiff.js(194,34): error TS2345: Argument of type 'number' is not assignable to parameter of type '{ [x: string]: any; WindowDocked: number; WindowUndocked: number; ScriptsBreakpointSet: number; T...'.
-node_modules/chrome-devtools-frontend/front_end/workspace_diff/WorkspaceDiff.js(206,18): error TS2339: Property 'addEventListener' does not exist on type 'UISourceCode'.
-node_modules/chrome-devtools-frontend/front_end/workspace_diff/WorkspaceDiff.js(207,18): error TS2339: Property 'addEventListener' does not exist on type 'UISourceCode'.
 node_modules/chrome-devtools-frontend/front_end/workspace_diff/WorkspaceDiff.js(236,30): error TS2694: Namespace 'Diff' has no exported member 'Diff'.
 node_modules/chrome-devtools-frontend/front_end/workspace_diff/WorkspaceDiff.js(260,30): error TS2694: Namespace 'Diff' has no exported member 'Diff'.
 node_modules/chrome-devtools-frontend/front_end/workspace_diff/WorkspaceDiff.js(301,36): error TS2339: Property '_instance' does not exist on type 'typeof WorkspaceDiff'.
diff --git a/tests/baselines/reference/user/lodash.log b/tests/baselines/reference/user/lodash.log
index d148b5e8ef17e..865a7d5eb4ebc 100644
--- a/tests/baselines/reference/user/lodash.log
+++ b/tests/baselines/reference/user/lodash.log
@@ -34,10 +34,10 @@ node_modules/lodash/_baseClone.js(128,43): error TS2345: Argument of type 'numbe
 node_modules/lodash/_baseClone.js(157,17): error TS2552: Cannot find name 'keysIn'. Did you mean 'keys'?
 node_modules/lodash/_baseDifference.js(37,5): error TS2322: Type '(array?: any[] | undefined, value: any, comparator: Function) => boolean' is not assignable to type '(array?: any[] | undefined, value: any) => boolean'.
 node_modules/lodash/_baseDifference.js(43,5): error TS2322: Type 'SetCache' is not assignable to type 'any[]'.
-  Property 'flatMap' is missing in type 'SetCache'.
+  Property 'length' is missing in type 'SetCache'.
 node_modules/lodash/_baseDifference.js(60,15): error TS2554: Expected 2 arguments, but got 3.
 node_modules/lodash/_baseFlatten.js(19,17): error TS2322: Type '(value: any) => boolean' is not assignable to type 'boolean | undefined'.
-  Type '(value: any) => boolean' is not assignable to type 'false'.
+  Type '(value: any) => boolean' is not assignable to type 'true'.
 node_modules/lodash/_baseFlatten.js(24,22): error TS2349: Cannot invoke an expression whose type lacks a call signature. Type 'Boolean' has no compatible call signatures.
 node_modules/lodash/_baseFlatten.js(24,22): error TS2532: Object is possibly 'undefined'.
 node_modules/lodash/_baseFlatten.js(24,22): error TS2722: Cannot invoke an object which is possibly 'undefined'.
@@ -150,7 +150,7 @@ node_modules/lodash/_mergeData.js(67,26): error TS2554: Expected 4 arguments, bu
 node_modules/lodash/_nodeUtil.js(4,69): error TS2339: Property 'nodeType' does not exist on type 'typeof import("/lodash/node_modules/lodash/_nodeUtil")'.
 node_modules/lodash/_nodeUtil.js(7,80): error TS2339: Property 'nodeType' does not exist on type 'NodeModule'.
 node_modules/lodash/_nodeUtil.js(13,47): error TS2339: Property 'process' does not exist on type 'boolean | Global'.
-  Property 'process' does not exist on type 'true'.
+  Property 'process' does not exist on type 'false'.
 node_modules/lodash/_overRest.js(20,42): error TS2532: Object is possibly 'undefined'.
 node_modules/lodash/_overRest.js(24,27): error TS2532: Object is possibly 'undefined'.
 node_modules/lodash/_overRest.js(27,27): error TS2532: Object is possibly 'undefined'.
@@ -179,7 +179,7 @@ node_modules/lodash/conforms.js(32,41): error TS2345: Argument of type 'number'
 node_modules/lodash/core.js(68,58): error TS2339: Property 'Object' does not exist on type 'Window'.
 node_modules/lodash/core.js(77,82): error TS2339: Property 'nodeType' does not exist on type 'NodeModule'.
 node_modules/lodash/core.js(540,19): error TS2322: Type '(value: any) => boolean' is not assignable to type 'boolean | undefined'.
-  Type '(value: any) => boolean' is not assignable to type 'false'.
+  Type '(value: any) => boolean' is not assignable to type 'true'.
 node_modules/lodash/core.js(545,24): error TS2349: Cannot invoke an expression whose type lacks a call signature. Type 'Boolean' has no compatible call signatures.
 node_modules/lodash/core.js(545,24): error TS2532: Object is possibly 'undefined'.
 node_modules/lodash/core.js(545,24): error TS2722: Cannot invoke an object which is possibly 'undefined'.
@@ -229,7 +229,7 @@ node_modules/lodash/core.js(3424,41): error TS2345: Argument of type 'Function'
   Type 'Function' provides no match for the signature '(substring: string, ...args: any[]): string'.
 node_modules/lodash/core.js(3573,51): error TS2532: Object is possibly 'undefined'.
 node_modules/lodash/core.js(3590,63): error TS2345: Argument of type 'IArguments' is not assignable to parameter of type 'any[]'.
-  Property 'flatMap' is missing in type 'IArguments'.
+  Property 'push' is missing in type 'IArguments'.
 node_modules/lodash/core.js(3830,14): error TS2304: Cannot find name 'define'.
 node_modules/lodash/core.js(3830,45): error TS2304: Cannot find name 'define'.
 node_modules/lodash/core.js(3830,71): error TS2304: Cannot find name 'define'.
@@ -249,12 +249,12 @@ node_modules/lodash/debounce.js(111,23): error TS2532: Object is possibly 'undef
 node_modules/lodash/debounce.js(125,65): error TS2532: Object is possibly 'undefined'.
 node_modules/lodash/deburr.js(42,44): error TS2345: Argument of type 'Function' is not assignable to parameter of type '(substring: string, ...args: any[]) => string'.
 node_modules/lodash/difference.js(29,52): error TS2345: Argument of type '(value: any) => boolean' is not assignable to parameter of type 'boolean | undefined'.
-  Type '(value: any) => boolean' is not assignable to type 'false'.
+  Type '(value: any) => boolean' is not assignable to type 'true'.
 node_modules/lodash/differenceBy.js(40,52): error TS2345: Argument of type '(value: any) => boolean' is not assignable to parameter of type 'boolean | undefined'.
-  Type '(value: any) => boolean' is not assignable to type 'false'.
+  Type '(value: any) => boolean' is not assignable to type 'true'.
 node_modules/lodash/differenceBy.js(40,78): error TS2554: Expected 0-1 arguments, but got 2.
 node_modules/lodash/differenceWith.js(36,52): error TS2345: Argument of type '(value: any) => boolean' is not assignable to parameter of type 'boolean | undefined'.
-  Type '(value: any) => boolean' is not assignable to type 'false'.
+  Type '(value: any) => boolean' is not assignable to type 'true'.
 node_modules/lodash/drop.js(13,10): error TS1003: Identifier expected.
 node_modules/lodash/drop.js(13,10): error TS8024: JSDoc '@param' tag has name '', but there is no parameter with that name.
 node_modules/lodash/dropRight.js(13,10): error TS1003: Identifier expected.
@@ -426,12 +426,12 @@ node_modules/lodash/truncate.js(85,7): error TS2454: Variable 'strSymbols' is us
 node_modules/lodash/unary.js(19,10): error TS2554: Expected 3 arguments, but got 2.
 node_modules/lodash/unescape.js(30,37): error TS2345: Argument of type 'Function' is not assignable to parameter of type '(substring: string, ...args: any[]) => string'.
 node_modules/lodash/union.js(23,42): error TS2345: Argument of type '(value: any) => boolean' is not assignable to parameter of type 'boolean | undefined'.
-  Type '(value: any) => boolean' is not assignable to type 'false'.
+  Type '(value: any) => boolean' is not assignable to type 'true'.
 node_modules/lodash/unionBy.js(36,42): error TS2345: Argument of type '(value: any) => boolean' is not assignable to parameter of type 'boolean | undefined'.
-  Type '(value: any) => boolean' is not assignable to type 'false'.
+  Type '(value: any) => boolean' is not assignable to type 'true'.
 node_modules/lodash/unionBy.js(36,68): error TS2554: Expected 0-1 arguments, but got 2.
 node_modules/lodash/unionWith.js(31,42): error TS2345: Argument of type '(value: any) => boolean' is not assignable to parameter of type 'boolean | undefined'.
-  Type '(value: any) => boolean' is not assignable to type 'false'.
+  Type '(value: any) => boolean' is not assignable to type 'true'.
 node_modules/lodash/uniqBy.js(28,52): error TS2554: Expected 0-1 arguments, but got 2.
 node_modules/lodash/words.js(15,10): error TS1003: Identifier expected.
 node_modules/lodash/words.js(15,10): error TS8024: JSDoc '@param' tag has name '', but there is no parameter with that name.
diff --git a/tests/baselines/reference/user/npm.log b/tests/baselines/reference/user/npm.log
index 93ea207ee55be..a0e7f73afcf2e 100644
--- a/tests/baselines/reference/user/npm.log
+++ b/tests/baselines/reference/user/npm.log
@@ -492,6 +492,11 @@ node_modules/npm/lib/ls.js(152,11): error TS2339: Property 'config' does not exi
 node_modules/npm/lib/ls.js(180,22): error TS2339: Property 'config' does not exist on type 'EventEmitter'.
 node_modules/npm/lib/ls.js(191,52): error TS2339: Property 'globalDir' does not exist on type 'EventEmitter'.
 node_modules/npm/lib/ls.js(254,22): error TS2339: Property 'config' does not exist on type 'EventEmitter'.
+node_modules/npm/lib/ls.js(260,16): error TS2339: Property 'problems' does not exist on type 'string | { [x: string]: any; name: any; version: any; extraneous: boolean; problems: any; invalid...'.
+  Property 'problems' does not exist on type 'string'.
+node_modules/npm/lib/ls.js(262,54): error TS2339: Property 'problems' does not exist on type 'string | { [x: string]: any; name: any; version: any; extraneous: boolean; problems: any; invalid...'.
+  Property 'problems' does not exist on type 'string'.
+node_modules/npm/lib/ls.js(264,12): error TS2538: Type '{ [x: string]: any; name: any; version: any; extraneous: boolean; problems: any; invalid: boolean...' cannot be used as an index type.
 node_modules/npm/lib/ls.js(357,40): error TS2339: Property 'config' does not exist on type 'EventEmitter'.
 node_modules/npm/lib/ls.js(362,26): error TS2339: Property 'config' does not exist on type 'EventEmitter'.
 node_modules/npm/lib/ls.js(365,15): error TS2339: Property 'color' does not exist on type 'EventEmitter'.
diff --git a/tests/baselines/reference/user/puppeteer.log b/tests/baselines/reference/user/puppeteer.log
index 1a8517ca72bdf..84773a3e13a20 100644
--- a/tests/baselines/reference/user/puppeteer.log
+++ b/tests/baselines/reference/user/puppeteer.log
@@ -18,6 +18,7 @@ lib/ElementHandle.js(24,15): error TS2503: Cannot find namespace 'Protocol'.
 lib/ElementHandle.js(83,29): error TS2503: Cannot find namespace 'Protocol'.
 lib/EmulationManager.js(36,16): error TS2503: Cannot find namespace 'Protocol'.
 lib/ExecutionContext.js(22,15): error TS2503: Cannot find namespace 'Protocol'.
+lib/ExecutionContext.js(87,15): error TS2304: Cannot find name 'Frame'.
 lib/ExecutionContext.js(132,15): error TS2503: Cannot find namespace 'Protocol'.
 lib/FrameManager.js(28,15): error TS2503: Cannot find namespace 'Protocol'.
 lib/FrameManager.js(54,15): error TS2503: Cannot find namespace 'Protocol'.
diff --git a/tests/baselines/reference/user/uglify-js.log b/tests/baselines/reference/user/uglify-js.log
index dc8c1811d769f..4fb7b01a2c984 100644
--- a/tests/baselines/reference/user/uglify-js.log
+++ b/tests/baselines/reference/user/uglify-js.log
@@ -2,7 +2,7 @@ Exit Code: 1
 Standard output:
 node_modules/uglify-js/lib/ast.js(210,23): error TS2554: Expected 0 arguments, but got 1.
 node_modules/uglify-js/lib/ast.js(332,33): error TS2339: Property 'transform' does not exist on type 'string'.
-node_modules/uglify-js/lib/ast.js(860,5): error TS2322: Type '{ [x: string]: any; _visit: (node: any, descend: any) => any; parent: (n: any) => any; push: type...' is not assignable to type 'TreeWalker'.
+node_modules/uglify-js/lib/ast.js(877,5): error TS2322: Type '{ [x: string]: any; _visit: (node: any, descend: any) => any; parent: (n: any) => any; push: type...' is not assignable to type 'TreeWalker'.
   Object literal may only specify known properties, but '_visit' does not exist in type 'TreeWalker'. Did you mean to write 'visit'?
 node_modules/uglify-js/lib/compress.js(165,27): error TS2554: Expected 0 arguments, but got 1.
 node_modules/uglify-js/lib/compress.js(514,26): error TS2554: Expected 0 arguments, but got 1.
@@ -66,7 +66,7 @@ node_modules/uglify-js/lib/compress.js(6232,25): error TS2403: Subsequent variab
 node_modules/uglify-js/lib/compress.js(6235,46): error TS2339: Property 'has_side_effects' does not exist on type 'number'.
 node_modules/uglify-js/lib/compress.js(6242,25): error TS2403: Subsequent variable declarations must have the same type.  Variable 'value' must be of type 'number', but here has type 'any'.
 node_modules/uglify-js/lib/compress.js(6295,19): error TS2554: Expected 0 arguments, but got 1.
-node_modules/uglify-js/lib/minify.js(166,75): error TS2339: Property 'compress' does not exist on type 'Compressor'.
+node_modules/uglify-js/lib/minify.js(170,75): error TS2339: Property 'compress' does not exist on type 'Compressor'.
 node_modules/uglify-js/lib/mozilla-ast.js(569,18): error TS2554: Expected 0 arguments, but got 1.
 node_modules/uglify-js/lib/output.js(481,22): error TS2554: Expected 0 arguments, but got 1.
 node_modules/uglify-js/lib/output.js(774,23): error TS2554: Expected 0 arguments, but got 1.
@@ -113,11 +113,8 @@ node_modules/uglify-js/lib/scope.js(465,15): error TS2554: Expected 0 arguments,
 node_modules/uglify-js/lib/scope.js(490,15): error TS2554: Expected 0 arguments, but got 1.
 node_modules/uglify-js/lib/sourcemap.js(56,25): error TS2304: Cannot find name 'MOZ_SourceMap'.
 node_modules/uglify-js/lib/sourcemap.js(62,23): error TS2304: Cannot find name 'MOZ_SourceMap'.
-node_modules/uglify-js/tools/exit.js(2,12): error TS2454: Variable 'process' is used before being assigned.
-node_modules/uglify-js/tools/exit.js(3,1): error TS2454: Variable 'process' is used before being assigned.
-node_modules/uglify-js/tools/exit.js(5,13): error TS2339: Property 'once' does not exist on type 'typeof process'.
-node_modules/uglify-js/tools/exit.js(7,25): error TS2339: Property 'stdout' does not exist on type 'typeof process'.
-node_modules/uglify-js/tools/exit.js(7,54): error TS2339: Property 'stderr' does not exist on type 'typeof process'.
+node_modules/uglify-js/tools/exit.js(7,32): error TS2339: Property 'bufferSize' does not exist on type 'WriteStream'.
+node_modules/uglify-js/tools/exit.js(7,61): error TS2339: Property 'bufferSize' does not exist on type 'WriteStream'.
 node_modules/uglify-js/tools/node.js(68,27): error TS2339: Property 'minify' does not exist on type 'typeof import("/uglify-js/node_modules/uglify-js/tools/node")'.
 
 
diff --git a/tests/baselines/reference/user/util.log b/tests/baselines/reference/user/util.log
index aee2663c4dab4..743d8d5e332b2 100644
--- a/tests/baselines/reference/user/util.log
+++ b/tests/baselines/reference/user/util.log
@@ -1,53 +1,5 @@
 Exit Code: 1
 Standard output:
-node_modules/util/test/browser/inspect.js(25,1): error TS2304: Cannot find name 'suite'.
-node_modules/util/test/browser/inspect.js(27,1): error TS2304: Cannot find name 'test'.
-node_modules/util/test/browser/inspect.js(29,16): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/util/test/browser/inspect.js(31,16): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/util/test/browser/inspect.js(33,16): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/util/test/browser/inspect.js(36,1): error TS2304: Cannot find name 'test'.
-node_modules/util/test/browser/inspect.js(37,16): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/util/test/browser/inspect.js(38,16): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/util/test/browser/inspect.js(39,16): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/util/test/browser/inspect.js(40,16): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/util/test/browser/is.js(26,1): error TS2304: Cannot find name 'suite'.
-node_modules/util/test/browser/is.js(28,1): error TS2304: Cannot find name 'test'.
-node_modules/util/test/browser/is.js(41,1): error TS2304: Cannot find name 'test'.
-node_modules/util/test/browser/is.js(43,36): error TS2554: Expected 1-2 arguments, but got 0.
-node_modules/util/test/browser/is.js(44,36): error TS2554: Expected 1-2 arguments, but got 0.
-node_modules/util/test/browser/is.js(51,1): error TS2304: Cannot find name 'test'.
-node_modules/util/test/browser/is.js(61,1): error TS2304: Cannot find name 'test'.
-node_modules/util/test/browser/is.js(71,1): error TS2304: Cannot find name 'test'.
-node_modules/util/test/browser/is.js(81,1): error TS2304: Cannot find name 'test'.
-node_modules/util/test/browser/is.js(83,36): error TS2348: Value of type '{ new (str: string, encoding?: string | undefined): Buffer; new (size: number): Buffer; new (arra...' is not callable. Did you mean to include 'new'?
-node_modules/util/test/node/debug.js(53,45): error TS2345: Argument of type 'number' is not assignable to parameter of type 'string | undefined'.
-node_modules/util/test/node/inspect.js(31,12): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/util/test/node/inspect.js(33,13): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/util/test/node/inspect.js(38,14): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/util/test/node/inspect.js(40,14): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/util/test/node/inspect.js(42,14): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/util/test/node/inspect.js(66,14): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/util/test/node/inspect.js(67,14): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/util/test/node/inspect.js(68,14): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/util/test/node/inspect.js(69,14): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/util/test/node/inspect.js(71,3): error TS2304: Cannot find name 'undef'.
-node_modules/util/test/node/inspect.js(73,16): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/util/test/node/inspect.js(82,14): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/util/test/node/inspect.js(87,3): error TS2322: Type 'null' is not assignable to type '() => string'.
-node_modules/util/test/node/inspect.js(88,3): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/util/test/node/inspect.js(93,3): error TS2322: Type 'null' is not assignable to type '() => string'.
-node_modules/util/test/node/inspect.js(94,3): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/util/test/node/inspect.js(99,3): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/util/test/node/inspect.js(106,11): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/util/test/node/inspect.js(133,3): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/util/test/node/inspect.js(151,1): error TS2322: Type '{ inspect: () => number; }' is not assignable to type '{ [x: string]: any; foo: string; hello: number; a: { [x: string]: any; b: { [x: string]: any; c: ...'.
-  Property 'foo' is missing in type '{ inspect: () => number; }'.
-node_modules/util/test/node/inspect.js(161,14): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/util/test/node/inspect.js(175,23): error TS2555: Expected at least 2 arguments, but got 1.
-node_modules/util/test/node/log.js(34,9): error TS2339: Property '_stderr' does not exist on type 'Console'.
-node_modules/util/test/node/log.js(55,16): error TS2531: Object is possibly 'null'.
-node_modules/util/test/node/util.js(43,34): error TS2554: Expected 1-2 arguments, but got 0.
-node_modules/util/test/node/util.js(44,34): error TS2554: Expected 1-2 arguments, but got 0.
 node_modules/util/util.js(27,20): error TS2555: Expected at least 2 arguments, but got 1.
 node_modules/util/util.js(35,45): error TS2345: Argument of type '(x: string) => string | number' is not assignable to parameter of type '(substring: string, ...args: any[]) => string'.
   Type 'string | number' is not assignable to type 'string'.
diff --git a/tests/cases/compiler/APISample_Watch.ts b/tests/cases/compiler/APISample_Watch.ts
index e150667642651..154e5f90b0e71 100644
--- a/tests/cases/compiler/APISample_Watch.ts
+++ b/tests/cases/compiler/APISample_Watch.ts
@@ -1,12 +1,18 @@
 // @module: commonjs
 // @skipLibCheck: true
-// @includebuiltfile: typescript_standalone.d.ts
+// @includebuiltfile: typescriptServices.d.ts
 // @noImplicitAny:true
 // @strictNullChecks:true
 
+// @filename: node_modules/typescript/index.d.ts
+declare module "typescript" {
+    export = ts;
+}
+
+// @filename: APISample_Watch.ts
 /*
  * Note: This test is a public API sample. The sample sources can be found
-         at: https://github.com/Microsoft/TypeScript-wiki/blob/master/Using-the-Compiler-API.md#writing-an-incremental-program-watcher
+ *       at: https://github.com/Microsoft/TypeScript-wiki/blob/master/Using-the-Compiler-API.md#writing-an-incremental-program-watcher
  *       Please log a "breaking change" issue for any API breaking change affecting this issue
  */
 
diff --git a/tests/cases/compiler/APISample_WatchWithDefaults.ts b/tests/cases/compiler/APISample_WatchWithDefaults.ts
index 24f251daca2c1..d028d109275ca 100644
--- a/tests/cases/compiler/APISample_WatchWithDefaults.ts
+++ b/tests/cases/compiler/APISample_WatchWithDefaults.ts
@@ -1,9 +1,15 @@
 // @module: commonjs
 // @skipLibCheck: true
-// @includebuiltfile: typescript_standalone.d.ts
+// @includebuiltfile: typescriptServices.d.ts
 // @noImplicitAny:true
-// @strict:true
+// @strictNullChecks:true
 
+// @filename: node_modules/typescript/index.d.ts
+declare module "typescript" {
+    export = ts;
+}
+
+// @filename: APISample_WatchWithDefaults.ts
 /*
  * Note: This test is a public API sample. This uses default sys interface without having to pass anything
  *       Please log a "breaking change" issue for any API breaking change affecting this issue
diff --git a/tests/cases/compiler/APISample_WatchWithOwnWatchHost.ts b/tests/cases/compiler/APISample_WatchWithOwnWatchHost.ts
index 18f170bd5f634..18cb5766ce331 100644
--- a/tests/cases/compiler/APISample_WatchWithOwnWatchHost.ts
+++ b/tests/cases/compiler/APISample_WatchWithOwnWatchHost.ts
@@ -1,11 +1,17 @@
 // @module: commonjs
 // @skipLibCheck: true
-// @includebuiltfile: typescript_standalone.d.ts
+// @includebuiltfile: typescriptServices.d.ts
 // @noImplicitAny:true
-// @strict:true
+// @strictNullChecks:true
 
+// @filename: node_modules/typescript/index.d.ts
+declare module "typescript" {
+    export = ts;
+}
+
+// @filename: APISample_WatchWithOwnWatchHost.ts
 /*
- * Note: This test is a public API sample. This sample verifies creating abstract builder to watch list of root files 
+ * Note: This test is a public API sample. This sample verifies creating abstract builder to watch list of root files
  *       Please log a "breaking change" issue for any API breaking change affecting this issue
  */
 
@@ -19,23 +25,23 @@ function watchMain() {
     const options: ts.CompilerOptions = {};
 
     const host: ts.WatchCompilerHostOfFilesAndCompilerOptions<ts.BuilderProgram> = {
-        rootFiles: files,
-        options,
-
-        useCaseSensitiveFileNames: () => ts.sys.useCaseSensitiveFileNames,
-        getNewLine: () => ts.sys.newLine,
-        getCurrentDirectory: ts.sys.getCurrentDirectory,
-        getDefaultLibFileName: options => ts.getDefaultLibFilePath(options),
-
-        fileExists: ts.sys.fileExists,
-        readFile: ts.sys.readFile,
-        directoryExists: ts.sys.directoryExists,
-        getDirectories: ts.sys.getDirectories,
-        readDirectory: ts.sys.readDirectory,
-        realpath: ts.sys.realpath,
-
-        watchFile: ts.sys.watchFile!,
-        watchDirectory: ts.sys.watchDirectory!,
+        rootFiles: files,
+        options,
+
+        useCaseSensitiveFileNames: () => ts.sys.useCaseSensitiveFileNames,
+        getNewLine: () => ts.sys.newLine,
+        getCurrentDirectory: ts.sys.getCurrentDirectory,
+        getDefaultLibFileName: options => ts.getDefaultLibFilePath(options),
+
+        fileExists: ts.sys.fileExists,
+        readFile: ts.sys.readFile,
+        directoryExists: ts.sys.directoryExists,
+        getDirectories: ts.sys.getDirectories,
+        readDirectory: ts.sys.readDirectory,
+        realpath: ts.sys.realpath,
+
+        watchFile: ts.sys.watchFile!,
+        watchDirectory: ts.sys.watchDirectory!,
         createProgram: ts.createAbstractBuilder
     };
 
diff --git a/tests/cases/compiler/APISample_compile.ts b/tests/cases/compiler/APISample_compile.ts
index 35fe8192e78e5..49d821fae16b3 100644
--- a/tests/cases/compiler/APISample_compile.ts
+++ b/tests/cases/compiler/APISample_compile.ts
@@ -1,12 +1,18 @@
 // @module: commonjs
 // @skipLibCheck: true
-// @includebuiltfile: typescript_standalone.d.ts
+// @includebuiltfile: typescriptServices.d.ts
 // @noImplicitAny:true
 // @strictNullChecks:true
 
+// @filename: node_modules/typescript/index.d.ts
+declare module "typescript" {
+    export = ts;
+}
+
+// @filename: APISample_compile.ts
 /*
  * Note: This test is a public API sample. The sample sources can be found
-         at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#a-minimal-compiler
+ *       at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#a-minimal-compiler
  *       Please log a "breaking change" issue for any API breaking change affecting this issue
  */
 
diff --git a/tests/cases/compiler/APISample_jsdoc.ts b/tests/cases/compiler/APISample_jsdoc.ts
index d40673f1d9ed0..1ca3c88e5507a 100644
--- a/tests/cases/compiler/APISample_jsdoc.ts
+++ b/tests/cases/compiler/APISample_jsdoc.ts
@@ -1,8 +1,15 @@
 // @module: commonjs
 // @skipLibCheck: true
-// @includebuiltfile: typescript_standalone.d.ts
-// @strict:true
+// @includebuiltfile: typescriptServices.d.ts
+// @noImplicitAny:true
+// @strictNullChecks:true
 
+// @filename: node_modules/typescript/index.d.ts
+declare module "typescript" {
+    export = ts;
+}
+
+// @filename: APISample_jsdoc.ts
 /*
  * Note: This test is a public API sample. The original sources can be found
  *       at: https://github.com/YousefED/typescript-json-schema
diff --git a/tests/cases/compiler/APISample_linter.ts b/tests/cases/compiler/APISample_linter.ts
index 0d8dc0190fede..a6ae00944bb07 100644
--- a/tests/cases/compiler/APISample_linter.ts
+++ b/tests/cases/compiler/APISample_linter.ts
@@ -1,12 +1,18 @@
 // @module: commonjs
 // @skipLibCheck: true
-// @includebuiltfile: typescript_standalone.d.ts
+// @includebuiltfile: typescriptServices.d.ts
 // @noImplicitAny:true
 // @strictNullChecks:true
 
+// @filename: node_modules/typescript/index.d.ts
+declare module "typescript" {
+    export = ts;
+}
+
+// @filename: APISample_linter.ts
 /*
- * Note: This test is a public API sample. The sample sources can be found 
-         at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#traversing-the-ast-with-a-little-linter
+ * Note: This test is a public API sample. The sample sources can be found
+ *       at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#traversing-the-ast-with-a-little-linter
  *       Please log a "breaking change" issue for any API breaking change affecting this issue
  */
 
diff --git a/tests/cases/compiler/APISample_parseConfig.ts b/tests/cases/compiler/APISample_parseConfig.ts
index c3094a9398841..243e25f995b2a 100644
--- a/tests/cases/compiler/APISample_parseConfig.ts
+++ b/tests/cases/compiler/APISample_parseConfig.ts
@@ -1,12 +1,18 @@
 // @module: commonjs
 // @skipLibCheck: true
-// @includebuiltfile: typescript_standalone.d.ts
+// @includebuiltfile: typescriptServices.d.ts
 // @noImplicitAny:true
 // @strictNullChecks:true
 
+// @filename: node_modules/typescript/index.d.ts
+declare module "typescript" {
+    export = ts;
+}
+
+// @filename: APISample_parseConfig.ts
 /*
- * Note: This test is a public API sample. The sample sources can be found 
-         at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#a-minimal-compiler
+ * Note: This test is a public API sample. The sample sources can be found
+ *       at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#a-minimal-compiler
  *       Please log a "breaking change" issue for any API breaking change affecting this issue
  */
 
diff --git a/tests/cases/compiler/APISample_transform.ts b/tests/cases/compiler/APISample_transform.ts
index c7b0fad8e75cb..a750d0d359596 100644
--- a/tests/cases/compiler/APISample_transform.ts
+++ b/tests/cases/compiler/APISample_transform.ts
@@ -1,12 +1,18 @@
 // @module: commonjs
 // @skipLibCheck: true
-// @includebuiltfile: typescript_standalone.d.ts
+// @includebuiltfile: typescriptServices.d.ts
 // @noImplicitAny:true
 // @strictNullChecks:true
 
+// @filename: node_modules/typescript/index.d.ts
+declare module "typescript" {
+    export = ts;
+}
+
+// @filename: APISample_transform.ts
 /*
- * Note: This test is a public API sample. The sample sources can be found 
-         at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#a-simple-transform-function
+ * Note: This test is a public API sample. The sample sources can be found
+ *       at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#a-simple-transform-function
  *       Please log a "breaking change" issue for any API breaking change affecting this issue
  */
 
diff --git a/tests/cases/compiler/APISample_watcher.ts b/tests/cases/compiler/APISample_watcher.ts
index 5be0e9e38ad73..8b46979e09288 100644
--- a/tests/cases/compiler/APISample_watcher.ts
+++ b/tests/cases/compiler/APISample_watcher.ts
@@ -1,12 +1,18 @@
 // @module: commonjs
 // @skipLibCheck: true
-// @includebuiltfile: typescript_standalone.d.ts
+// @includebuiltfile: typescriptServices.d.ts
 // @noImplicitAny:true
 // @strictNullChecks:true
 
+// @filename: node_modules/typescript/index.d.ts
+declare module "typescript" {
+    export = ts;
+}
+
+// @filename: APISample_watcher.ts
 /*
  * Note: This test is a public API sample. The sample sources can be found
-         at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#incremental-build-support-using-the-language-services
+ *       at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#incremental-build-support-using-the-language-services
  *       Please log a "breaking change" issue for any API breaking change affecting this issue
  */
 
diff --git a/tests/cases/compiler/esModuleInteropPrettyErrorRelatedInformation.ts b/tests/cases/compiler/esModuleInteropPrettyErrorRelatedInformation.ts
new file mode 100644
index 0000000000000..6b8c5c947b20f
--- /dev/null
+++ b/tests/cases/compiler/esModuleInteropPrettyErrorRelatedInformation.ts
@@ -0,0 +1,10 @@
+// @pretty: true
+// @esModuleInterop: true
+// @filename: foo.d.ts
+declare function foo(): void;
+declare namespace foo {}
+export = foo;
+// @filename: index.ts
+import * as foo from "./foo";
+function invoke(f: () => void) { f(); }
+invoke(foo);
diff --git a/tests/cases/compiler/symbolLinkDeclarationEmitModuleNames.ts b/tests/cases/compiler/symbolLinkDeclarationEmitModuleNames.ts
new file mode 100644
index 0000000000000..95defd4ecc768
--- /dev/null
+++ b/tests/cases/compiler/symbolLinkDeclarationEmitModuleNames.ts
@@ -0,0 +1,25 @@
+// @declaration: true
+// @filename: monorepo/core/src/application.ts
+import { Constructor } from "@loopback/context";
+export type ControllerClass = Constructor<any>;
+// @filename: monorepo/core/src/usage.ts
+import { ControllerClass } from './application';
+import { BindingKey } from '@loopback/context';
+
+export const CONTROLLER_CLASS = BindingKey.create<ControllerClass>(null as any); // line in question
+// @filename: monorepo/context/src/value-promise.ts
+export type Constructor<T> = (...args: any[]) => T;
+// @filename: monorepo/context/src/bindingkey.ts
+import { Constructor } from "@loopback/context"
+export class BindingKey<T> {
+  readonly __type: T;
+  static create<T extends Constructor<any>>(ctor: T) {
+    return new BindingKey<T>();
+  }
+}
+
+// @filename: monorepo/context/index.ts
+export * from "./src/value-promise";
+export * from "./src/bindingkey";
+
+// @link: tests/cases/compiler/monorepo/context -> tests/cases/compiler/monorepo/core/node_modules/@loopback/context
\ No newline at end of file
diff --git a/tests/cases/compiler/symbolLinkDeclarationEmitModuleNamesRootDir.ts b/tests/cases/compiler/symbolLinkDeclarationEmitModuleNamesRootDir.ts
new file mode 100644
index 0000000000000..fd120ca1e85af
--- /dev/null
+++ b/tests/cases/compiler/symbolLinkDeclarationEmitModuleNamesRootDir.ts
@@ -0,0 +1,33 @@
+// @currentDirectory: monorepo/core
+// @filename: monorepo/context/src/value-promise.d.ts
+export type Constructor<T> = (...args: any[]) => T;
+// @filename: monorepo/context/src/bindingkey.d.ts
+import { Constructor } from "./value-promise"
+export declare class BindingKey<T> {
+  readonly __type: T;
+  static create<T extends Constructor<any>>(ctor: T): BindingKey<T>;
+}
+
+// @filename: monorepo/context/index.d.ts
+export * from "./src/value-promise";
+export * from "./src/bindingkey";
+
+// @filename: monorepo/core/tsconfig.json
+{
+  "compilerOptions": {
+    "rootDir": ".",
+    "declaration": true,
+    "outDir": "./dist"
+  }
+}
+// @filename: monorepo/core/src/application.ts
+import { Constructor } from "@loopback/context";
+export type ControllerClass = Constructor<any>;
+
+// @filename: monorepo/core/src/usage.ts
+import { ControllerClass } from './application';
+import { BindingKey } from '@loopback/context';
+
+export const CONTROLLER_CLASS = BindingKey.create<ControllerClass>(null as any); // line in question
+
+// @link: tests/cases/compiler/monorepo/context -> tests/cases/compiler/monorepo/core/node_modules/@loopback/context
\ No newline at end of file
diff --git a/tests/cases/compiler/unusedLocalsStartingWithUnderscore.ts b/tests/cases/compiler/unusedLocalsStartingWithUnderscore.ts
index 4e6930a62826a..431d4fd15d8cb 100644
--- a/tests/cases/compiler/unusedLocalsStartingWithUnderscore.ts
+++ b/tests/cases/compiler/unusedLocalsStartingWithUnderscore.ts
@@ -1,13 +1,15 @@
-//@noUnusedLocals:true
+// @noUnusedLocals:true
+
+// @Filename: /a.ts
+import * as _ from "./a";
 
 for (const _ of []) { }
 
 for (const _ in []) { }
 
-namespace M {
+namespace _ns {
     let _;
     for (const _ of []) { }
 
     for (const _ in []) { }
 }
-    
\ No newline at end of file
diff --git a/tests/cases/conformance/jsdoc/checkJsdocTypeTag4.ts b/tests/cases/conformance/jsdoc/checkJsdocTypeTag4.ts
new file mode 100644
index 0000000000000..63eae378b9e3c
--- /dev/null
+++ b/tests/cases/conformance/jsdoc/checkJsdocTypeTag4.ts
@@ -0,0 +1,16 @@
+// @checkJs: true
+// @allowJs: true
+// @noEmit: true
+
+// @Filename: t.d.ts
+type A<T extends string> = { a: T }
+
+// @Filename: test.js
+/** Also should error for jsdoc typedefs
+ * @template {string} U
+ * @typedef {{ b: U }} B
+ */
+/** @type {A<number>} */
+var a;
+/** @type {B<number>} */
+var b;
diff --git a/tests/cases/conformance/jsdoc/noDuplicateJsdoc1.ts b/tests/cases/conformance/jsdoc/noDuplicateJsdoc1.ts
new file mode 100644
index 0000000000000..bb1c9fe5f85bb
--- /dev/null
+++ b/tests/cases/conformance/jsdoc/noDuplicateJsdoc1.ts
@@ -0,0 +1,6 @@
+// @allowJs: true
+// @checkJs: true
+// @noEmit: true
+// @Filename: a.js
+/** doc */
+const a = b = () => 0;
diff --git a/tests/cases/conformance/jsdoc/thisTag1.ts b/tests/cases/conformance/jsdoc/thisTag1.ts
new file mode 100644
index 0000000000000..62416b78d1622
--- /dev/null
+++ b/tests/cases/conformance/jsdoc/thisTag1.ts
@@ -0,0 +1,19 @@
+// @noEmit: true
+// @allowJs: true
+// @checkJs: true
+// @strict: true
+// @Filename: a.js
+
+/** @this {{ n: number }} Mount Holyoke Preparatory School
+ * @param {string} s
+ * @return {number}
+ */
+function f(s) {
+    return this.n + s.length
+}
+
+const o = {
+    f,
+    n: 1
+}
+o.f('hi')
diff --git a/tests/cases/conformance/jsdoc/typedefMultipleTypeParameters.ts b/tests/cases/conformance/jsdoc/typedefMultipleTypeParameters.ts
index 9fc7c0d0d4175..d70f1d6ef4df5 100644
--- a/tests/cases/conformance/jsdoc/typedefMultipleTypeParameters.ts
+++ b/tests/cases/conformance/jsdoc/typedefMultipleTypeParameters.ts
@@ -13,7 +13,6 @@
 /** @type {Everything<{ a: number, b: 'hi', c: never }, undefined, { c: true, d: 1 }, number, string>} */
 var tuvwx;
 
-// TODO: will error when #24592 is fixed
 /** @type {Everything<{ a: number  }, undefined, { c: 1, d: 1 }, number, string>} */
 var wrong;
 
diff --git a/tests/cases/conformance/salsa/conflictingCommonJSES2015Exports.ts b/tests/cases/conformance/salsa/conflictingCommonJSES2015Exports.ts
new file mode 100644
index 0000000000000..35acd416e79b1
--- /dev/null
+++ b/tests/cases/conformance/salsa/conflictingCommonJSES2015Exports.ts
@@ -0,0 +1,9 @@
+// @checkJs: true
+// @allowJS: true
+// @noEmit: true
+// @Filename: bug24934.js
+export function abc(a, b, c) { return 5; }
+module.exports = { abc };
+// @Filename: use.js
+import { abc } from './bug24934';
+abc(1, 2, 3);
diff --git a/tests/cases/conformance/salsa/typeFromPropertyAssignment18.ts b/tests/cases/conformance/salsa/typeFromPropertyAssignment18.ts
index 3940cd7a13e39..40525ef019179 100644
--- a/tests/cases/conformance/salsa/typeFromPropertyAssignment18.ts
+++ b/tests/cases/conformance/salsa/typeFromPropertyAssignment18.ts
@@ -8,5 +8,7 @@ function m() {
 GLOBSTAR.p = 1
 m.GLOBSTAR.q = 2
 
+GLOBSTAR.p
 GLOBSTAR.q
 m.GLOBSTAR.p
+m.GLOBSTAR.q
diff --git a/tests/cases/conformance/salsa/typeFromPropertyAssignment26.ts b/tests/cases/conformance/salsa/typeFromPropertyAssignment26.ts
new file mode 100644
index 0000000000000..600f46805b442
--- /dev/null
+++ b/tests/cases/conformance/salsa/typeFromPropertyAssignment26.ts
@@ -0,0 +1,19 @@
+// @noEmit: true
+// @noImplicitAny: true
+// @checkJs: true
+// @allowJs: true
+// @Filename: bug24730.js
+var UI = {}
+UI.TreeElement = class {
+    constructor() {
+        this.treeOutline = 12
+    }
+};
+UI.context = new UI.TreeElement()
+
+class C extends UI.TreeElement {
+    onpopulate() {
+        this.doesNotExist
+        this.treeOutline.doesntExistEither()
+    }
+};
diff --git a/tests/cases/fourslash/codeFixCalledES2015Import1.ts b/tests/cases/fourslash/codeFixCalledES2015Import1.ts
index 45e88c190478d..af102c1a0cb0d 100644
--- a/tests/cases/fourslash/codeFixCalledES2015Import1.ts
+++ b/tests/cases/fourslash/codeFixCalledES2015Import1.ts
@@ -6,13 +6,15 @@
 ////export = foo;
 
 // @Filename: index.ts
-////[|import * as foo from "./foo";|]
+////import * as foo from "./foo";
 ////function invoke(f: () => void) { f(); }
-////invoke(foo);
+////invoke([|foo|]);
 
 goTo.file(1);
 verify.codeFix({
     description: `Replace import with 'import foo = require("./foo");'.`,
-    newRangeContent: `import foo = require("./foo");`,
+    newFileContent: `import foo = require("./foo");
+function invoke(f: () => void) { f(); }
+invoke(foo);`,
     index: 1,
 });
diff --git a/tests/cases/fourslash/codeFixCalledES2015Import12.ts b/tests/cases/fourslash/codeFixCalledES2015Import12.ts
index 6c31531d572ef..e869d9d5701d4 100644
--- a/tests/cases/fourslash/codeFixCalledES2015Import12.ts
+++ b/tests/cases/fourslash/codeFixCalledES2015Import12.ts
@@ -14,5 +14,5 @@ verify.codeFix({
     description: `Use synthetic 'default' member.`,
     newFileContent: `import * as foo from "./foo";
 foo.default();`,
-    index: 4,
+    index: 2,
 });
diff --git a/tests/cases/fourslash/codeFixCalledES2015Import2.ts b/tests/cases/fourslash/codeFixCalledES2015Import2.ts
index 80040cb419287..1ea71b2fc7706 100644
--- a/tests/cases/fourslash/codeFixCalledES2015Import2.ts
+++ b/tests/cases/fourslash/codeFixCalledES2015Import2.ts
@@ -6,13 +6,15 @@
 ////export = foo;
 
 // @Filename: index.ts
-////[|import * as foo from "./foo";|]
+////import * as foo from "./foo";
 ////function invoke(f: () => void) { f(); }
-////invoke(foo);
+////invoke([|foo|]);
 
 goTo.file(1);
 verify.codeFix({
     description: `Replace import with 'import foo from "./foo";'.`,
-    newRangeContent: `import foo from "./foo";`,
+    newFileContent: `import foo from "./foo";
+function invoke(f: () => void) { f(); }
+invoke(foo);`,
     index: 0,
 });
diff --git a/tests/cases/fourslash/codeFixCalledES2015Import3.ts b/tests/cases/fourslash/codeFixCalledES2015Import3.ts
index 82f08fbc22f0b..c9eb402c800c5 100644
--- a/tests/cases/fourslash/codeFixCalledES2015Import3.ts
+++ b/tests/cases/fourslash/codeFixCalledES2015Import3.ts
@@ -7,13 +7,15 @@
 ////export = foo;
 
 // @Filename: index.ts
-////[|import * as foo from "./foo";|]
+////import * as foo from "./foo";
 ////function invoke(f: () => void) { f(); }
-////invoke(foo);
+////invoke([|foo|]);
 
 goTo.file(1);
 verify.codeFix({
     description: `Replace import with 'import foo from "./foo";'.`,
-    newRangeContent: `import foo from "./foo";`,
+    newFileContent: `import foo from "./foo";
+function invoke(f: () => void) { f(); }
+invoke(foo);`,
     index: 0,
 });
diff --git a/tests/cases/fourslash/codeFixCalledES2015Import4.ts b/tests/cases/fourslash/codeFixCalledES2015Import4.ts
index ba6d90d6d411f..68d29db2e9881 100644
--- a/tests/cases/fourslash/codeFixCalledES2015Import4.ts
+++ b/tests/cases/fourslash/codeFixCalledES2015Import4.ts
@@ -6,12 +6,13 @@
 ////export = foo;
 
 // @Filename: index.ts
-////[|import * as foo from "./foo";|]
-////foo();
+////import * as foo from "./foo";
+////[|foo|]();
 
 goTo.file(1);
 verify.codeFix({
     description: `Replace import with 'import foo = require("./foo");'.`,
-    newRangeContent: `import foo = require("./foo");`,
+    newFileContent: `import foo = require("./foo");
+foo();`,
     index: 1,
 });
diff --git a/tests/cases/fourslash/getEditsForFileRename.ts b/tests/cases/fourslash/getEditsForFileRename.ts
index 03aab26097841..6cd7f9bb046bf 100644
--- a/tests/cases/fourslash/getEditsForFileRename.ts
+++ b/tests/cases/fourslash/getEditsForFileRename.ts
@@ -14,6 +14,10 @@
 /////// <reference path="../old.ts" />
 ////import old from "../old";
 
+// @Filename: /unrelated.ts
+// Don't update an unrelated import
+////import { x } from "././src/./foo/./a";
+
 // @Filename: /src/new.ts
 ////
 
diff --git a/tests/cases/fourslash/getEditsForFileRename_tsconfig.ts b/tests/cases/fourslash/getEditsForFileRename_tsconfig.ts
index 611bff185393a..62a4d835f5f4d 100644
--- a/tests/cases/fourslash/getEditsForFileRename_tsconfig.ts
+++ b/tests/cases/fourslash/getEditsForFileRename_tsconfig.ts
@@ -4,7 +4,6 @@
 ////{
 ////    "compilerOptions": {
 ////        "baseUrl": "./old",
-////        "mapRoot": "../src/old",
 ////        "paths": {
 ////            "foo": ["old"],
 ////        },
@@ -25,7 +24,6 @@ verify.getEditsForFileRename({
 `{
     "compilerOptions": {
         "baseUrl": "new",
-        "mapRoot": "new",
         "paths": {
             "foo": ["new"],
         },
diff --git a/tests/cases/fourslash/moveToNewFile.ts b/tests/cases/fourslash/moveToNewFile.ts
index 9175e37889d27..f07daa8e37135 100644
--- a/tests/cases/fourslash/moveToNewFile.ts
+++ b/tests/cases/fourslash/moveToNewFile.ts
@@ -1,6 +1,8 @@
 /// <reference path='fourslash.ts' />
 
 // @Filename: /a.ts
+////// header comment
+////
 ////import './foo';
 ////import { a, b, alreadyUnused } from './other';
 ////const p = 0;
@@ -10,10 +12,11 @@
 verify.moveToNewFile({
     newFileContents: {
         "/a.ts":
-`import { y } from './y';
+`// header comment
 
 import './foo';
 import { a, alreadyUnused } from './other';
+import { y } from './y';
 export const p = 0;
 a; y;`,
 
diff --git a/tests/cases/fourslash/moveToNewFile_inferQuoteStyle.ts b/tests/cases/fourslash/moveToNewFile_inferQuoteStyle.ts
index 1e7b4347a87c3..a891e9b717ae2 100644
--- a/tests/cases/fourslash/moveToNewFile_inferQuoteStyle.ts
+++ b/tests/cases/fourslash/moveToNewFile_inferQuoteStyle.ts
@@ -9,9 +9,8 @@
 verify.moveToNewFile({
     newFileContents: {
         "/a.ts":
-`import { x } from './x';
-
-import 'unrelated';
+`import 'unrelated';
+import { x } from './x';
 
 x;`,
 
diff --git a/tests/projects/outfile-concat/first/first_PART1.ts b/tests/projects/outfile-concat/first/first_PART1.ts
new file mode 100644
index 0000000000000..b8810033aaacb
--- /dev/null
+++ b/tests/projects/outfile-concat/first/first_PART1.ts
@@ -0,0 +1,11 @@
+interface TheFirst {
+    none: any;
+}
+
+const s = "Hello, world";
+
+interface NoJsForHereEither {
+    none: any;
+}
+
+console.log(s);

From 64aabf23f8df638ec23e0dfe3830c2f8a21ab1a1 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Sat, 16 Jun 2018 07:48:17 -0700
Subject: [PATCH 21/37] Accept new baselines

---
 tests/baselines/reference/api/tsserverlibrary.d.ts | 3 +++
 tests/baselines/reference/api/typescript.d.ts      | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/tests/baselines/reference/api/tsserverlibrary.d.ts b/tests/baselines/reference/api/tsserverlibrary.d.ts
index 75b03fe050903..8506c37633f88 100644
--- a/tests/baselines/reference/api/tsserverlibrary.d.ts
+++ b/tests/baselines/reference/api/tsserverlibrary.d.ts
@@ -3351,6 +3351,9 @@ declare namespace ts {
         hasRestElement: boolean;
         associatedNames?: __String[];
     }
+    interface TupleTypeReference extends TypeReference {
+        target: TupleType;
+    }
     interface UnionOrIntersectionType extends Type {
         types: Type[];
         propertyCache: SymbolTable;
diff --git a/tests/baselines/reference/api/typescript.d.ts b/tests/baselines/reference/api/typescript.d.ts
index d3d1d836cc32f..959267dc74515 100644
--- a/tests/baselines/reference/api/typescript.d.ts
+++ b/tests/baselines/reference/api/typescript.d.ts
@@ -2279,6 +2279,9 @@ declare namespace ts {
         hasRestElement: boolean;
         associatedNames?: __String[];
     }
+    interface TupleTypeReference extends TypeReference {
+        target: TupleType;
+    }
     interface UnionOrIntersectionType extends Type {
         types: Type[];
     }

From 3f03a37806b3fb26d1531e35f700e26e05324a4a Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Sat, 16 Jun 2018 08:57:05 -0700
Subject: [PATCH 22/37] Infer union types for rest elements in tuples

---
 src/compiler/checker.ts | 20 ++++++++++++--------
 1 file changed, 12 insertions(+), 8 deletions(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index d86b14ad72c76..edeb4424d1d09 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -12952,14 +12952,18 @@ namespace ts {
                     const targetLength = getLengthOfTupleType(target);
                     const sourceRestType = getRestTypeOfTupleType(source);
                     const targetRestType = getRestTypeOfTupleType(target);
-                    const count = sourceRestType && targetRestType ? Math.max(sourceLength, targetLength) + 1 :
-                        sourceRestType ? targetLength :
-                        targetRestType ? sourceLength :
-                        Math.min(sourceLength, targetLength);
-                    for (let i = 0; i < count; i++) {
-                        const s = i < sourceLength ? source.typeArguments![i] : sourceRestType!;
-                        const t = i < targetLength ? target.typeArguments![i] : targetRestType!;
-                        inferFromTypes(s, t);
+                    const fixedLength = targetLength < sourceLength || sourceRestType ? targetLength : sourceLength;
+                    for (let i = 0; i < fixedLength; i++) {
+                        inferFromTypes(i < sourceLength ? source.typeArguments![i] : sourceRestType!, target.typeArguments![i]);
+                    }
+                    if (targetRestType) {
+                        const types = fixedLength < sourceLength ? source.typeArguments!.slice(fixedLength, sourceLength) : [];
+                        if (sourceRestType) {
+                            types.push(sourceRestType);
+                        }
+                        if (types.length) {
+                            inferFromTypes(getUnionType(types), targetRestType);
+                        }
                     }
                 }
                 else {

From 43bac20b83cd7ebe2a972e482ebbc87936d83c61 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Sat, 16 Jun 2018 13:30:17 -0700
Subject: [PATCH 23/37] Array literals contextually typed by tuple types with
 rest elements

---
 src/compiler/checker.ts | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index edeb4424d1d09..3b85e7ab0537d 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -15993,7 +15993,7 @@ namespace ts {
 
         function checkArrayLiteral(node: ArrayLiteralExpression, checkMode: CheckMode | undefined): Type {
             const elements = node.elements;
-            let hasSpreadElement = false;
+            let hasNonEndingSpreadElement = false;
             const elementTypes: Type[] = [];
             const inDestructuringPattern = isAssignmentTarget(node);
             const contextualType = getApparentTypeOfContextualType(node);
@@ -16024,9 +16024,9 @@ namespace ts {
                     const type = checkExpressionForMutableLocation(e, checkMode, elementContextualType);
                     elementTypes.push(type);
                 }
-                hasSpreadElement = hasSpreadElement || e.kind === SyntaxKind.SpreadElement;
+                hasNonEndingSpreadElement = hasNonEndingSpreadElement || (index < elements.length - 1 && e.kind === SyntaxKind.SpreadElement);
             }
-            if (!hasSpreadElement) {
+            if (!hasNonEndingSpreadElement) {
                 // If array literal is actually a destructuring pattern, mark it as an implied type. We do this such
                 // that we get the same behavior for "var [x, y] = []" and "[x, y] = []".
                 if (inDestructuringPattern && elementTypes.length) {
@@ -16053,7 +16053,8 @@ namespace ts {
                             }
                         }
                     }
-                    return createTupleType(elementTypes);
+                    const hasSpreadElement = elements.length > 0 && elements[elements.length - 1].kind === SyntaxKind.SpreadElement;
+                    return createTupleType(elementTypes, elementTypes.length - (hasSpreadElement ? 1 : 0), hasSpreadElement);
                 }
             }
             return createArrayType(elementTypes.length ?

From ae859d63031916eab91feb98785fd8c4f9ff0f91 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Thu, 21 Jun 2018 17:01:46 -1000
Subject: [PATCH 24/37] Update destructuring to support optional and rest
 elements in tuples

---
 src/compiler/checker.ts | 101 ++++++++++++++++++++++++----------------
 1 file changed, 60 insertions(+), 41 deletions(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 3b85e7ab0537d..921371e6bae0f 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -4514,22 +4514,27 @@ namespace ts {
                 // present (aka the tuple element property). This call also checks that the parentType is in
                 // fact an iterable or array (depending on target language).
                 const elementType = checkIteratedTypeOrElementType(parentType, pattern, /*allowStringInput*/ false, /*allowAsyncIterables*/ false);
+                const index = pattern.elements.indexOf(declaration);
                 if (declaration.dotDotDotToken) {
-                    // Rest element has an array type with the same element type as the parent type
-                    type = createArrayType(elementType);
+                    // If the parent is a tuple type, the rest element has an array type with a union of the
+                    // remaining tuple element types. Otherwise, the rest element has an array type with same
+                    // element type as the parent type.
+                    type = isTupleType(parentType) ?
+                        getArrayLiteralType((parentType.typeArguments || emptyArray).slice(index, getTypeReferenceArity(parentType))) :
+                        createArrayType(elementType);
                 }
                 else {
                     // Use specific property type when parent is a tuple or numeric index type when parent is an array
-                    const propName = "" + pattern.elements.indexOf(declaration);
-                    type = isTupleLikeType(parentType)
-                        ? getTypeOfPropertyOfType(parentType, propName as __String)
-                        : elementType;
+                    const index = pattern.elements.indexOf(declaration);
+                    type = isTupleLikeType(parentType) ?
+                        getTupleElementType(parentType, index) || declaration.initializer && checkDeclarationInitializer(declaration) :
+                        elementType;
                     if (!type) {
                         if (isTupleType(parentType)) {
                             error(declaration, Diagnostics.Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2, typeToString(parentType), getTypeReferenceArity(<TypeReference>parentType), pattern.elements.length);
                         }
                         else {
-                            error(declaration, Diagnostics.Type_0_has_no_property_1, typeToString(parentType), propName);
+                            error(declaration, Diagnostics.Type_0_has_no_property_1, typeToString(parentType), "" + index);
                         }
                         return errorType;
                     }
@@ -4800,7 +4805,7 @@ namespace ts {
         // pattern. Otherwise, it is the type any.
         function getTypeFromBindingElement(element: BindingElement, includePatternInType?: boolean, reportErrors?: boolean): Type {
             if (element.initializer) {
-                return checkDeclarationInitializer(element);
+                return addOptionality(checkDeclarationInitializer(element));
             }
             if (isBindingPattern(element.name)) {
                 return getTypeFromBindingPattern(element.name, includePatternInType, reportErrors);
@@ -4848,12 +4853,13 @@ namespace ts {
         function getTypeFromArrayBindingPattern(pattern: BindingPattern, includePatternInType: boolean, reportErrors: boolean): Type {
             const elements = pattern.elements;
             const lastElement = lastOrUndefined(elements);
-            if (!lastElement || (!isOmittedExpression(lastElement) && lastElement.dotDotDotToken)) {
+            const hasRestElement = !!(lastElement && lastElement.kind === SyntaxKind.BindingElement && lastElement.dotDotDotToken);
+            if (elements.length === 0 || elements.length === 1 && hasRestElement) {
                 return languageVersion >= ScriptTarget.ES2015 ? createIterableType(anyType) : anyArrayType;
             }
-            // If the pattern has at least one element, and no rest element, then it should imply a tuple type.
             const elementTypes = map(elements, e => isOmittedExpression(e) ? anyType : getTypeFromBindingElement(e, includePatternInType, reportErrors));
-            let result = <TypeReference>createTupleType(elementTypes);
+            const minLength = findLastIndex(elements, e => !isOmittedExpression(e) && !hasDefaultValue(e), elements.length - (hasRestElement ? 2 : 1)) + 1;
+            let result = <TypeReference>createTupleType(elementTypes, minLength, hasRestElement);
             if (includePatternInType) {
                 result = cloneTypeReference(result);
                 result.pattern = pattern;
@@ -12076,6 +12082,12 @@ namespace ts {
             return isTupleType(type) || !!getPropertyOfType(type, "0" as __String);
         }
 
+        function getTupleElementType(type: Type, index: number) {
+            return isTupleType(type) ?
+                index < getLengthOfTupleType(type) ? type.typeArguments![index] : getRestTypeOfTupleType(type) :
+                getTypeOfPropertyOfType(type, "" + index as __String);
+        }
+
         function isNeitherUnitTypeNorNever(type: Type): boolean {
             return !(type.flags & (TypeFlags.Unit | TypeFlags.Never));
         }
@@ -13471,7 +13483,7 @@ namespace ts {
         }
 
         function getTypeOfDestructuredArrayElement(type: Type, index: number) {
-            return isTupleLikeType(type) && getTypeOfPropertyOfType(type, "" + index as __String) ||
+            return isTupleLikeType(type) && getTupleElementType(type, index) ||
                 checkIteratedTypeOrElementType(type, /*errorNode*/ undefined, /*allowStringInput*/ false, /*allowAsyncIterables*/ false) ||
                 errorType;
         }
@@ -15993,11 +16005,12 @@ namespace ts {
 
         function checkArrayLiteral(node: ArrayLiteralExpression, checkMode: CheckMode | undefined): Type {
             const elements = node.elements;
+            const elementCount = elements.length;
             let hasNonEndingSpreadElement = false;
             const elementTypes: Type[] = [];
             const inDestructuringPattern = isAssignmentTarget(node);
             const contextualType = getApparentTypeOfContextualType(node);
-            for (let index = 0; index < elements.length; index++) {
+            for (let index = 0; index < elementCount; index++) {
                 const e = elements[index];
                 if (inDestructuringPattern && e.kind === SyntaxKind.SpreadElement) {
                     // Given the following situation:
@@ -16024,13 +16037,17 @@ namespace ts {
                     const type = checkExpressionForMutableLocation(e, checkMode, elementContextualType);
                     elementTypes.push(type);
                 }
-                hasNonEndingSpreadElement = hasNonEndingSpreadElement || (index < elements.length - 1 && e.kind === SyntaxKind.SpreadElement);
+                if (index < elementCount - 1 && e.kind === SyntaxKind.SpreadElement) {
+                    hasNonEndingSpreadElement = true;
+                }
             }
             if (!hasNonEndingSpreadElement) {
+                const hasRestElement = elementCount > 0 && elements[elementCount - 1].kind === SyntaxKind.SpreadElement;
+                const minLength = elementCount - (hasRestElement ? 1 : 0);
                 // If array literal is actually a destructuring pattern, mark it as an implied type. We do this such
                 // that we get the same behavior for "var [x, y] = []" and "[x, y] = []".
-                if (inDestructuringPattern && elementTypes.length) {
-                    const type = cloneTypeReference(<TypeReference>createTupleType(elementTypes));
+                if (inDestructuringPattern && minLength > 0) {
+                    const type = cloneTypeReference(<TypeReference>createTupleType(elementTypes, minLength, hasRestElement));
                     type.pattern = node;
                     return type;
                 }
@@ -16038,27 +16055,30 @@ namespace ts {
                     const pattern = contextualType.pattern;
                     // If array literal is contextually typed by a binding pattern or an assignment pattern, pad the resulting
                     // tuple type with the corresponding binding or assignment element types to make the lengths equal.
-                    if (pattern && (pattern.kind === SyntaxKind.ArrayBindingPattern || pattern.kind === SyntaxKind.ArrayLiteralExpression)) {
+                    if (!hasRestElement && pattern && (pattern.kind === SyntaxKind.ArrayBindingPattern || pattern.kind === SyntaxKind.ArrayLiteralExpression)) {
                         const patternElements = (<BindingPattern | ArrayLiteralExpression>pattern).elements;
-                        for (let i = elementTypes.length; i < patternElements.length; i++) {
-                            const patternElement = patternElements[i];
-                            if (hasDefaultValue(patternElement)) {
+                        for (let i = elementCount; i < patternElements.length; i++) {
+                            const e = patternElements[i];
+                            if (hasDefaultValue(e)) {
                                 elementTypes.push((<TypeReference>contextualType).typeArguments![i]);
                             }
-                            else {
-                                if (patternElement.kind !== SyntaxKind.OmittedExpression) {
-                                    error(patternElement, Diagnostics.Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value);
+                            else if (i < patternElements.length - 1 || !(e.kind === SyntaxKind.BindingElement && (<BindingElement>e).dotDotDotToken || e.kind === SyntaxKind.SpreadElement)) {
+                                if (e.kind !== SyntaxKind.OmittedExpression) {
+                                    error(e, Diagnostics.Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value);
                                 }
                                 elementTypes.push(strictNullChecks ? implicitNeverType : undefinedWideningType);
                             }
                         }
                     }
-                    const hasSpreadElement = elements.length > 0 && elements[elements.length - 1].kind === SyntaxKind.SpreadElement;
-                    return createTupleType(elementTypes, elementTypes.length - (hasSpreadElement ? 1 : 0), hasSpreadElement);
+                    return createTupleType(elementTypes, minLength, hasRestElement);
                 }
             }
+            return getArrayLiteralType(elementTypes, UnionReduction.Subtype);
+        }
+
+        function getArrayLiteralType(elementTypes: Type[], unionReduction = UnionReduction.Literal) {
             return createArrayType(elementTypes.length ?
-                getUnionType(elementTypes, UnionReduction.Subtype) :
+                getUnionType(elementTypes, unionReduction) :
                 strictNullChecks ? implicitNeverType : undefinedWideningType);
         }
 
@@ -20418,24 +20438,20 @@ namespace ts {
             if (element.kind !== SyntaxKind.OmittedExpression) {
                 if (element.kind !== SyntaxKind.SpreadElement) {
                     const propName = "" + elementIndex as __String;
-                    const type = isTypeAny(sourceType)
-                        ? sourceType
-                        : isTupleLikeType(sourceType)
-                            ? getTypeOfPropertyOfType(sourceType, propName)
-                            : elementType;
+                    const type = isTypeAny(sourceType) ? sourceType :
+                        isTupleLikeType(sourceType) ? getTupleElementType(sourceType, elementIndex) :
+                        elementType;
                     if (type) {
                         return checkDestructuringAssignment(element, type, checkMode);
                     }
+                    // We still need to check element expression here because we may need to set appropriate flag on the expression
+                    // such as NodeCheckFlags.LexicalThis on "this"expression.
+                    checkExpression(element);
+                    if (isTupleType(sourceType)) {
+                        error(element, Diagnostics.Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2, typeToString(sourceType), getTypeReferenceArity(<TypeReference>sourceType), elements.length);
+                    }
                     else {
-                        // We still need to check element expression here because we may need to set appropriate flag on the expression
-                        // such as NodeCheckFlags.LexicalThis on "this"expression.
-                        checkExpression(element);
-                        if (isTupleType(sourceType)) {
-                            error(element, Diagnostics.Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2, typeToString(sourceType), getTypeReferenceArity(<TypeReference>sourceType), elements.length);
-                        }
-                        else {
-                            error(element, Diagnostics.Type_0_has_no_property_1, typeToString(sourceType), propName as string);
-                        }
+                        error(element, Diagnostics.Type_0_has_no_property_1, typeToString(sourceType), propName as string);
                     }
                 }
                 else {
@@ -20449,7 +20465,10 @@ namespace ts {
                         }
                         else {
                             checkGrammarForDisallowedTrailingComma(node.elements, Diagnostics.A_rest_parameter_or_binding_pattern_may_not_have_a_trailing_comma);
-                            return checkDestructuringAssignment(restExpression, createArrayType(elementType), checkMode);
+                            const type = isTupleType(sourceType) ?
+                                getArrayLiteralType((sourceType.typeArguments || emptyArray).slice(elementIndex, getTypeReferenceArity(sourceType))) :
+                                createArrayType(elementType);
+                            return checkDestructuringAssignment(restExpression, type, checkMode);
                         }
                     }
                 }

From c2310009e1c596735cba5d2181d889ac3d32d758 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Thu, 21 Jun 2018 17:02:35 -1000
Subject: [PATCH 25/37] Update tests

---
 .../declarationsAndAssignments.errors.txt     |  36 ++--
 .../reference/declarationsAndAssignments.js   |  66 ++++---
 .../declarationsAndAssignments.symbols        | 146 ++++++++-------
 .../declarationsAndAssignments.types          | 168 ++++++++++--------
 .../declarationsAndAssignments.ts             |  36 ++--
 5 files changed, 246 insertions(+), 206 deletions(-)

diff --git a/tests/baselines/reference/declarationsAndAssignments.errors.txt b/tests/baselines/reference/declarationsAndAssignments.errors.txt
index 64bd8d7e57825..920f995ef3202 100644
--- a/tests/baselines/reference/declarationsAndAssignments.errors.txt
+++ b/tests/baselines/reference/declarationsAndAssignments.errors.txt
@@ -103,7 +103,7 @@ tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts(138,9):
     }
     
     function f8() {
-        var [a, b, c] = [];   // Ok, [] is an array
+        var [a, b, c] = [];   // Error, [] is an empty tuple
              ~
 !!! error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
                 ~
@@ -224,32 +224,36 @@ tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts(138,9):
     }
     
     function f20() {
-        var a: number[];
         var x: number;
         var y: number;
         var z: number;
+        var a: number[];
+        var a3: any[];
         var [...a] = [1, 2, 3];
         var [x, ...a] = [1, 2, 3];
         var [x, y, ...a] = [1, 2, 3];
-        var [x, y, z, ...a] = [1, 2, 3];
+        var [x, y, z, ...a3] = [1, 2, 3];
         [...a] = [1, 2, 3];
         [x, ...a] = [1, 2, 3];
         [x, y, ...a] = [1, 2, 3];
-        [x, y, z, ...a] = [1, 2, 3];
+        [x, y, z, ...a3] = [1, 2, 3];
     }
     
     function f21() {
-        var a: (number | string | boolean)[];
-        var x: number | string | boolean;
-        var y: number | string | boolean;
-        var z: number | string | boolean;
-        var [...a] = [1, "hello", true];
-        var [x, ...a] = [1, "hello", true];
-        var [x, y, ...a] = [1, "hello", true];
-        var [x, y, z, ...a] = [1, "hello", true];
-        [...a] = [1, "hello", true];
-        [x, ...a] = [1, "hello", true];
-        [x, y, ...a] = [1, "hello", true];
-        [x, y, z, ...a] = [1, "hello", true];
+        var x: number;
+        var y: string;
+        var z: boolean;
+        var a0: (number | string | boolean)[];
+        var a1: (string | boolean)[];
+        var a2: boolean[];
+        var a3: any[];
+        var [...a0] = [1, "hello", true];
+        var [x, ...a1] = [1, "hello", true];
+        var [x, y, ...a2] = [1, "hello", true];
+        var [x, y, z, ...a3] = [1, "hello", true];
+        [...a0] = [1, "hello", true];
+        [x, ...a1] = [1, "hello", true];
+        [x, y, ...a2] = [1, "hello", true];
+        [x, y, z, ...a3] = [1, "hello", true];
     }
     
\ No newline at end of file
diff --git a/tests/baselines/reference/declarationsAndAssignments.js b/tests/baselines/reference/declarationsAndAssignments.js
index 74d7cd941563e..b4bba2412893a 100644
--- a/tests/baselines/reference/declarationsAndAssignments.js
+++ b/tests/baselines/reference/declarationsAndAssignments.js
@@ -60,7 +60,7 @@ function f7() {
 }
 
 function f8() {
-    var [a, b, c] = [];   // Ok, [] is an array
+    var [a, b, c] = [];   // Error, [] is an empty tuple
     var [d, e, f] = [1];  // Error, [1] is a tuple
 }
 
@@ -150,33 +150,37 @@ function f19() {
 }
 
 function f20() {
-    var a: number[];
     var x: number;
     var y: number;
     var z: number;
+    var a: number[];
+    var a3: any[];
     var [...a] = [1, 2, 3];
     var [x, ...a] = [1, 2, 3];
     var [x, y, ...a] = [1, 2, 3];
-    var [x, y, z, ...a] = [1, 2, 3];
+    var [x, y, z, ...a3] = [1, 2, 3];
     [...a] = [1, 2, 3];
     [x, ...a] = [1, 2, 3];
     [x, y, ...a] = [1, 2, 3];
-    [x, y, z, ...a] = [1, 2, 3];
+    [x, y, z, ...a3] = [1, 2, 3];
 }
 
 function f21() {
-    var a: (number | string | boolean)[];
-    var x: number | string | boolean;
-    var y: number | string | boolean;
-    var z: number | string | boolean;
-    var [...a] = [1, "hello", true];
-    var [x, ...a] = [1, "hello", true];
-    var [x, y, ...a] = [1, "hello", true];
-    var [x, y, z, ...a] = [1, "hello", true];
-    [...a] = [1, "hello", true];
-    [x, ...a] = [1, "hello", true];
-    [x, y, ...a] = [1, "hello", true];
-    [x, y, z, ...a] = [1, "hello", true];
+    var x: number;
+    var y: string;
+    var z: boolean;
+    var a0: (number | string | boolean)[];
+    var a1: (string | boolean)[];
+    var a2: boolean[];
+    var a3: any[];
+    var [...a0] = [1, "hello", true];
+    var [x, ...a1] = [1, "hello", true];
+    var [x, y, ...a2] = [1, "hello", true];
+    var [x, y, z, ...a3] = [1, "hello", true];
+    [...a0] = [1, "hello", true];
+    [x, ...a1] = [1, "hello", true];
+    [x, y, ...a2] = [1, "hello", true];
+    [x, y, z, ...a3] = [1, "hello", true];
 }
 
 
@@ -235,7 +239,7 @@ function f7() {
     var y;
 }
 function f8() {
-    var _a = [], a = _a[0], b = _a[1], c = _a[2]; // Ok, [] is an array
+    var _a = [], a = _a[0], b = _a[1], c = _a[2]; // Error, [] is an empty tuple
     var _b = [1], d = _b[0], e = _b[1], f = _b[2]; // Error, [1] is a tuple
 }
 function f9() {
@@ -318,31 +322,35 @@ function f19() {
 }
 function f20() {
     var _a, _b, _c;
-    var a;
     var x;
     var y;
     var z;
+    var a;
+    var a3;
     var a = [1, 2, 3].slice(0);
     var _d = [1, 2, 3], x = _d[0], a = _d.slice(1);
     var _e = [1, 2, 3], x = _e[0], y = _e[1], a = _e.slice(2);
-    var _f = [1, 2, 3], x = _f[0], y = _f[1], z = _f[2], a = _f.slice(3);
+    var _f = [1, 2, 3], x = _f[0], y = _f[1], z = _f[2], a3 = _f.slice(3);
     a = [1, 2, 3].slice(0);
     _a = [1, 2, 3], x = _a[0], a = _a.slice(1);
     _b = [1, 2, 3], x = _b[0], y = _b[1], a = _b.slice(2);
-    _c = [1, 2, 3], x = _c[0], y = _c[1], z = _c[2], a = _c.slice(3);
+    _c = [1, 2, 3], x = _c[0], y = _c[1], z = _c[2], a3 = _c.slice(3);
 }
 function f21() {
     var _a, _b, _c;
-    var a;
     var x;
     var y;
     var z;
-    var a = [1, "hello", true].slice(0);
-    var _d = [1, "hello", true], x = _d[0], a = _d.slice(1);
-    var _e = [1, "hello", true], x = _e[0], y = _e[1], a = _e.slice(2);
-    var _f = [1, "hello", true], x = _f[0], y = _f[1], z = _f[2], a = _f.slice(3);
-    a = [1, "hello", true].slice(0);
-    _a = [1, "hello", true], x = _a[0], a = _a.slice(1);
-    _b = [1, "hello", true], x = _b[0], y = _b[1], a = _b.slice(2);
-    _c = [1, "hello", true], x = _c[0], y = _c[1], z = _c[2], a = _c.slice(3);
+    var a0;
+    var a1;
+    var a2;
+    var a3;
+    var a0 = [1, "hello", true].slice(0);
+    var _d = [1, "hello", true], x = _d[0], a1 = _d.slice(1);
+    var _e = [1, "hello", true], x = _e[0], y = _e[1], a2 = _e.slice(2);
+    var _f = [1, "hello", true], x = _f[0], y = _f[1], z = _f[2], a3 = _f.slice(3);
+    a0 = [1, "hello", true].slice(0);
+    _a = [1, "hello", true], x = _a[0], a1 = _a.slice(1);
+    _b = [1, "hello", true], x = _b[0], y = _b[1], a2 = _b.slice(2);
+    _c = [1, "hello", true], x = _c[0], y = _c[1], z = _c[2], a3 = _c.slice(3);
 }
diff --git a/tests/baselines/reference/declarationsAndAssignments.symbols b/tests/baselines/reference/declarationsAndAssignments.symbols
index 60518a541f88a..900d255345cb8 100644
--- a/tests/baselines/reference/declarationsAndAssignments.symbols
+++ b/tests/baselines/reference/declarationsAndAssignments.symbols
@@ -189,7 +189,7 @@ function f7() {
 function f8() {
 >f8 : Symbol(f8, Decl(declarationsAndAssignments.ts, 58, 1))
 
-    var [a, b, c] = [];   // Ok, [] is an array
+    var [a, b, c] = [];   // Error, [] is an empty tuple
 >a : Symbol(a, Decl(declarationsAndAssignments.ts, 61, 9))
 >b : Symbol(b, Decl(declarationsAndAssignments.ts, 61, 11))
 >c : Symbol(c, Decl(declarationsAndAssignments.ts, 61, 14))
@@ -474,104 +474,116 @@ function f19() {
 function f20() {
 >f20 : Symbol(f20, Decl(declarationsAndAssignments.ts, 148, 1))
 
-    var a: number[];
->a : Symbol(a, Decl(declarationsAndAssignments.ts, 151, 7), Decl(declarationsAndAssignments.ts, 155, 9), Decl(declarationsAndAssignments.ts, 156, 11), Decl(declarationsAndAssignments.ts, 157, 14), Decl(declarationsAndAssignments.ts, 158, 17))
-
     var x: number;
->x : Symbol(x, Decl(declarationsAndAssignments.ts, 152, 7), Decl(declarationsAndAssignments.ts, 156, 9), Decl(declarationsAndAssignments.ts, 157, 9), Decl(declarationsAndAssignments.ts, 158, 9))
+>x : Symbol(x, Decl(declarationsAndAssignments.ts, 151, 7), Decl(declarationsAndAssignments.ts, 157, 9), Decl(declarationsAndAssignments.ts, 158, 9), Decl(declarationsAndAssignments.ts, 159, 9))
 
     var y: number;
->y : Symbol(y, Decl(declarationsAndAssignments.ts, 153, 7), Decl(declarationsAndAssignments.ts, 157, 11), Decl(declarationsAndAssignments.ts, 158, 11))
+>y : Symbol(y, Decl(declarationsAndAssignments.ts, 152, 7), Decl(declarationsAndAssignments.ts, 158, 11), Decl(declarationsAndAssignments.ts, 159, 11))
 
     var z: number;
->z : Symbol(z, Decl(declarationsAndAssignments.ts, 154, 7), Decl(declarationsAndAssignments.ts, 158, 14))
+>z : Symbol(z, Decl(declarationsAndAssignments.ts, 153, 7), Decl(declarationsAndAssignments.ts, 159, 14))
+
+    var a: number[];
+>a : Symbol(a, Decl(declarationsAndAssignments.ts, 154, 7), Decl(declarationsAndAssignments.ts, 156, 9), Decl(declarationsAndAssignments.ts, 157, 11), Decl(declarationsAndAssignments.ts, 158, 14))
+
+    var a3: any[];
+>a3 : Symbol(a3, Decl(declarationsAndAssignments.ts, 155, 7), Decl(declarationsAndAssignments.ts, 159, 17))
 
     var [...a] = [1, 2, 3];
->a : Symbol(a, Decl(declarationsAndAssignments.ts, 151, 7), Decl(declarationsAndAssignments.ts, 155, 9), Decl(declarationsAndAssignments.ts, 156, 11), Decl(declarationsAndAssignments.ts, 157, 14), Decl(declarationsAndAssignments.ts, 158, 17))
+>a : Symbol(a, Decl(declarationsAndAssignments.ts, 154, 7), Decl(declarationsAndAssignments.ts, 156, 9), Decl(declarationsAndAssignments.ts, 157, 11), Decl(declarationsAndAssignments.ts, 158, 14))
 
     var [x, ...a] = [1, 2, 3];
->x : Symbol(x, Decl(declarationsAndAssignments.ts, 152, 7), Decl(declarationsAndAssignments.ts, 156, 9), Decl(declarationsAndAssignments.ts, 157, 9), Decl(declarationsAndAssignments.ts, 158, 9))
->a : Symbol(a, Decl(declarationsAndAssignments.ts, 151, 7), Decl(declarationsAndAssignments.ts, 155, 9), Decl(declarationsAndAssignments.ts, 156, 11), Decl(declarationsAndAssignments.ts, 157, 14), Decl(declarationsAndAssignments.ts, 158, 17))
+>x : Symbol(x, Decl(declarationsAndAssignments.ts, 151, 7), Decl(declarationsAndAssignments.ts, 157, 9), Decl(declarationsAndAssignments.ts, 158, 9), Decl(declarationsAndAssignments.ts, 159, 9))
+>a : Symbol(a, Decl(declarationsAndAssignments.ts, 154, 7), Decl(declarationsAndAssignments.ts, 156, 9), Decl(declarationsAndAssignments.ts, 157, 11), Decl(declarationsAndAssignments.ts, 158, 14))
 
     var [x, y, ...a] = [1, 2, 3];
->x : Symbol(x, Decl(declarationsAndAssignments.ts, 152, 7), Decl(declarationsAndAssignments.ts, 156, 9), Decl(declarationsAndAssignments.ts, 157, 9), Decl(declarationsAndAssignments.ts, 158, 9))
->y : Symbol(y, Decl(declarationsAndAssignments.ts, 153, 7), Decl(declarationsAndAssignments.ts, 157, 11), Decl(declarationsAndAssignments.ts, 158, 11))
->a : Symbol(a, Decl(declarationsAndAssignments.ts, 151, 7), Decl(declarationsAndAssignments.ts, 155, 9), Decl(declarationsAndAssignments.ts, 156, 11), Decl(declarationsAndAssignments.ts, 157, 14), Decl(declarationsAndAssignments.ts, 158, 17))
+>x : Symbol(x, Decl(declarationsAndAssignments.ts, 151, 7), Decl(declarationsAndAssignments.ts, 157, 9), Decl(declarationsAndAssignments.ts, 158, 9), Decl(declarationsAndAssignments.ts, 159, 9))
+>y : Symbol(y, Decl(declarationsAndAssignments.ts, 152, 7), Decl(declarationsAndAssignments.ts, 158, 11), Decl(declarationsAndAssignments.ts, 159, 11))
+>a : Symbol(a, Decl(declarationsAndAssignments.ts, 154, 7), Decl(declarationsAndAssignments.ts, 156, 9), Decl(declarationsAndAssignments.ts, 157, 11), Decl(declarationsAndAssignments.ts, 158, 14))
 
-    var [x, y, z, ...a] = [1, 2, 3];
->x : Symbol(x, Decl(declarationsAndAssignments.ts, 152, 7), Decl(declarationsAndAssignments.ts, 156, 9), Decl(declarationsAndAssignments.ts, 157, 9), Decl(declarationsAndAssignments.ts, 158, 9))
->y : Symbol(y, Decl(declarationsAndAssignments.ts, 153, 7), Decl(declarationsAndAssignments.ts, 157, 11), Decl(declarationsAndAssignments.ts, 158, 11))
->z : Symbol(z, Decl(declarationsAndAssignments.ts, 154, 7), Decl(declarationsAndAssignments.ts, 158, 14))
->a : Symbol(a, Decl(declarationsAndAssignments.ts, 151, 7), Decl(declarationsAndAssignments.ts, 155, 9), Decl(declarationsAndAssignments.ts, 156, 11), Decl(declarationsAndAssignments.ts, 157, 14), Decl(declarationsAndAssignments.ts, 158, 17))
+    var [x, y, z, ...a3] = [1, 2, 3];
+>x : Symbol(x, Decl(declarationsAndAssignments.ts, 151, 7), Decl(declarationsAndAssignments.ts, 157, 9), Decl(declarationsAndAssignments.ts, 158, 9), Decl(declarationsAndAssignments.ts, 159, 9))
+>y : Symbol(y, Decl(declarationsAndAssignments.ts, 152, 7), Decl(declarationsAndAssignments.ts, 158, 11), Decl(declarationsAndAssignments.ts, 159, 11))
+>z : Symbol(z, Decl(declarationsAndAssignments.ts, 153, 7), Decl(declarationsAndAssignments.ts, 159, 14))
+>a3 : Symbol(a3, Decl(declarationsAndAssignments.ts, 155, 7), Decl(declarationsAndAssignments.ts, 159, 17))
 
     [...a] = [1, 2, 3];
->a : Symbol(a, Decl(declarationsAndAssignments.ts, 151, 7), Decl(declarationsAndAssignments.ts, 155, 9), Decl(declarationsAndAssignments.ts, 156, 11), Decl(declarationsAndAssignments.ts, 157, 14), Decl(declarationsAndAssignments.ts, 158, 17))
+>a : Symbol(a, Decl(declarationsAndAssignments.ts, 154, 7), Decl(declarationsAndAssignments.ts, 156, 9), Decl(declarationsAndAssignments.ts, 157, 11), Decl(declarationsAndAssignments.ts, 158, 14))
 
     [x, ...a] = [1, 2, 3];
->x : Symbol(x, Decl(declarationsAndAssignments.ts, 152, 7), Decl(declarationsAndAssignments.ts, 156, 9), Decl(declarationsAndAssignments.ts, 157, 9), Decl(declarationsAndAssignments.ts, 158, 9))
->a : Symbol(a, Decl(declarationsAndAssignments.ts, 151, 7), Decl(declarationsAndAssignments.ts, 155, 9), Decl(declarationsAndAssignments.ts, 156, 11), Decl(declarationsAndAssignments.ts, 157, 14), Decl(declarationsAndAssignments.ts, 158, 17))
+>x : Symbol(x, Decl(declarationsAndAssignments.ts, 151, 7), Decl(declarationsAndAssignments.ts, 157, 9), Decl(declarationsAndAssignments.ts, 158, 9), Decl(declarationsAndAssignments.ts, 159, 9))
+>a : Symbol(a, Decl(declarationsAndAssignments.ts, 154, 7), Decl(declarationsAndAssignments.ts, 156, 9), Decl(declarationsAndAssignments.ts, 157, 11), Decl(declarationsAndAssignments.ts, 158, 14))
 
     [x, y, ...a] = [1, 2, 3];
->x : Symbol(x, Decl(declarationsAndAssignments.ts, 152, 7), Decl(declarationsAndAssignments.ts, 156, 9), Decl(declarationsAndAssignments.ts, 157, 9), Decl(declarationsAndAssignments.ts, 158, 9))
->y : Symbol(y, Decl(declarationsAndAssignments.ts, 153, 7), Decl(declarationsAndAssignments.ts, 157, 11), Decl(declarationsAndAssignments.ts, 158, 11))
->a : Symbol(a, Decl(declarationsAndAssignments.ts, 151, 7), Decl(declarationsAndAssignments.ts, 155, 9), Decl(declarationsAndAssignments.ts, 156, 11), Decl(declarationsAndAssignments.ts, 157, 14), Decl(declarationsAndAssignments.ts, 158, 17))
-
-    [x, y, z, ...a] = [1, 2, 3];
->x : Symbol(x, Decl(declarationsAndAssignments.ts, 152, 7), Decl(declarationsAndAssignments.ts, 156, 9), Decl(declarationsAndAssignments.ts, 157, 9), Decl(declarationsAndAssignments.ts, 158, 9))
->y : Symbol(y, Decl(declarationsAndAssignments.ts, 153, 7), Decl(declarationsAndAssignments.ts, 157, 11), Decl(declarationsAndAssignments.ts, 158, 11))
->z : Symbol(z, Decl(declarationsAndAssignments.ts, 154, 7), Decl(declarationsAndAssignments.ts, 158, 14))
->a : Symbol(a, Decl(declarationsAndAssignments.ts, 151, 7), Decl(declarationsAndAssignments.ts, 155, 9), Decl(declarationsAndAssignments.ts, 156, 11), Decl(declarationsAndAssignments.ts, 157, 14), Decl(declarationsAndAssignments.ts, 158, 17))
+>x : Symbol(x, Decl(declarationsAndAssignments.ts, 151, 7), Decl(declarationsAndAssignments.ts, 157, 9), Decl(declarationsAndAssignments.ts, 158, 9), Decl(declarationsAndAssignments.ts, 159, 9))
+>y : Symbol(y, Decl(declarationsAndAssignments.ts, 152, 7), Decl(declarationsAndAssignments.ts, 158, 11), Decl(declarationsAndAssignments.ts, 159, 11))
+>a : Symbol(a, Decl(declarationsAndAssignments.ts, 154, 7), Decl(declarationsAndAssignments.ts, 156, 9), Decl(declarationsAndAssignments.ts, 157, 11), Decl(declarationsAndAssignments.ts, 158, 14))
+
+    [x, y, z, ...a3] = [1, 2, 3];
+>x : Symbol(x, Decl(declarationsAndAssignments.ts, 151, 7), Decl(declarationsAndAssignments.ts, 157, 9), Decl(declarationsAndAssignments.ts, 158, 9), Decl(declarationsAndAssignments.ts, 159, 9))
+>y : Symbol(y, Decl(declarationsAndAssignments.ts, 152, 7), Decl(declarationsAndAssignments.ts, 158, 11), Decl(declarationsAndAssignments.ts, 159, 11))
+>z : Symbol(z, Decl(declarationsAndAssignments.ts, 153, 7), Decl(declarationsAndAssignments.ts, 159, 14))
+>a3 : Symbol(a3, Decl(declarationsAndAssignments.ts, 155, 7), Decl(declarationsAndAssignments.ts, 159, 17))
 }
 
 function f21() {
->f21 : Symbol(f21, Decl(declarationsAndAssignments.ts, 163, 1))
+>f21 : Symbol(f21, Decl(declarationsAndAssignments.ts, 164, 1))
+
+    var x: number;
+>x : Symbol(x, Decl(declarationsAndAssignments.ts, 167, 7), Decl(declarationsAndAssignments.ts, 175, 9), Decl(declarationsAndAssignments.ts, 176, 9), Decl(declarationsAndAssignments.ts, 177, 9))
+
+    var y: string;
+>y : Symbol(y, Decl(declarationsAndAssignments.ts, 168, 7), Decl(declarationsAndAssignments.ts, 176, 11), Decl(declarationsAndAssignments.ts, 177, 11))
+
+    var z: boolean;
+>z : Symbol(z, Decl(declarationsAndAssignments.ts, 169, 7), Decl(declarationsAndAssignments.ts, 177, 14))
 
-    var a: (number | string | boolean)[];
->a : Symbol(a, Decl(declarationsAndAssignments.ts, 166, 7), Decl(declarationsAndAssignments.ts, 170, 9), Decl(declarationsAndAssignments.ts, 171, 11), Decl(declarationsAndAssignments.ts, 172, 14), Decl(declarationsAndAssignments.ts, 173, 17))
+    var a0: (number | string | boolean)[];
+>a0 : Symbol(a0, Decl(declarationsAndAssignments.ts, 170, 7), Decl(declarationsAndAssignments.ts, 174, 9))
 
-    var x: number | string | boolean;
->x : Symbol(x, Decl(declarationsAndAssignments.ts, 167, 7), Decl(declarationsAndAssignments.ts, 171, 9), Decl(declarationsAndAssignments.ts, 172, 9), Decl(declarationsAndAssignments.ts, 173, 9))
+    var a1: (string | boolean)[];
+>a1 : Symbol(a1, Decl(declarationsAndAssignments.ts, 171, 7), Decl(declarationsAndAssignments.ts, 175, 11))
 
-    var y: number | string | boolean;
->y : Symbol(y, Decl(declarationsAndAssignments.ts, 168, 7), Decl(declarationsAndAssignments.ts, 172, 11), Decl(declarationsAndAssignments.ts, 173, 11))
+    var a2: boolean[];
+>a2 : Symbol(a2, Decl(declarationsAndAssignments.ts, 172, 7), Decl(declarationsAndAssignments.ts, 176, 14))
 
-    var z: number | string | boolean;
->z : Symbol(z, Decl(declarationsAndAssignments.ts, 169, 7), Decl(declarationsAndAssignments.ts, 173, 14))
+    var a3: any[];
+>a3 : Symbol(a3, Decl(declarationsAndAssignments.ts, 173, 7), Decl(declarationsAndAssignments.ts, 177, 17))
 
-    var [...a] = [1, "hello", true];
->a : Symbol(a, Decl(declarationsAndAssignments.ts, 166, 7), Decl(declarationsAndAssignments.ts, 170, 9), Decl(declarationsAndAssignments.ts, 171, 11), Decl(declarationsAndAssignments.ts, 172, 14), Decl(declarationsAndAssignments.ts, 173, 17))
+    var [...a0] = [1, "hello", true];
+>a0 : Symbol(a0, Decl(declarationsAndAssignments.ts, 170, 7), Decl(declarationsAndAssignments.ts, 174, 9))
 
-    var [x, ...a] = [1, "hello", true];
->x : Symbol(x, Decl(declarationsAndAssignments.ts, 167, 7), Decl(declarationsAndAssignments.ts, 171, 9), Decl(declarationsAndAssignments.ts, 172, 9), Decl(declarationsAndAssignments.ts, 173, 9))
->a : Symbol(a, Decl(declarationsAndAssignments.ts, 166, 7), Decl(declarationsAndAssignments.ts, 170, 9), Decl(declarationsAndAssignments.ts, 171, 11), Decl(declarationsAndAssignments.ts, 172, 14), Decl(declarationsAndAssignments.ts, 173, 17))
+    var [x, ...a1] = [1, "hello", true];
+>x : Symbol(x, Decl(declarationsAndAssignments.ts, 167, 7), Decl(declarationsAndAssignments.ts, 175, 9), Decl(declarationsAndAssignments.ts, 176, 9), Decl(declarationsAndAssignments.ts, 177, 9))
+>a1 : Symbol(a1, Decl(declarationsAndAssignments.ts, 171, 7), Decl(declarationsAndAssignments.ts, 175, 11))
 
-    var [x, y, ...a] = [1, "hello", true];
->x : Symbol(x, Decl(declarationsAndAssignments.ts, 167, 7), Decl(declarationsAndAssignments.ts, 171, 9), Decl(declarationsAndAssignments.ts, 172, 9), Decl(declarationsAndAssignments.ts, 173, 9))
->y : Symbol(y, Decl(declarationsAndAssignments.ts, 168, 7), Decl(declarationsAndAssignments.ts, 172, 11), Decl(declarationsAndAssignments.ts, 173, 11))
->a : Symbol(a, Decl(declarationsAndAssignments.ts, 166, 7), Decl(declarationsAndAssignments.ts, 170, 9), Decl(declarationsAndAssignments.ts, 171, 11), Decl(declarationsAndAssignments.ts, 172, 14), Decl(declarationsAndAssignments.ts, 173, 17))
+    var [x, y, ...a2] = [1, "hello", true];
+>x : Symbol(x, Decl(declarationsAndAssignments.ts, 167, 7), Decl(declarationsAndAssignments.ts, 175, 9), Decl(declarationsAndAssignments.ts, 176, 9), Decl(declarationsAndAssignments.ts, 177, 9))
+>y : Symbol(y, Decl(declarationsAndAssignments.ts, 168, 7), Decl(declarationsAndAssignments.ts, 176, 11), Decl(declarationsAndAssignments.ts, 177, 11))
+>a2 : Symbol(a2, Decl(declarationsAndAssignments.ts, 172, 7), Decl(declarationsAndAssignments.ts, 176, 14))
 
-    var [x, y, z, ...a] = [1, "hello", true];
->x : Symbol(x, Decl(declarationsAndAssignments.ts, 167, 7), Decl(declarationsAndAssignments.ts, 171, 9), Decl(declarationsAndAssignments.ts, 172, 9), Decl(declarationsAndAssignments.ts, 173, 9))
->y : Symbol(y, Decl(declarationsAndAssignments.ts, 168, 7), Decl(declarationsAndAssignments.ts, 172, 11), Decl(declarationsAndAssignments.ts, 173, 11))
->z : Symbol(z, Decl(declarationsAndAssignments.ts, 169, 7), Decl(declarationsAndAssignments.ts, 173, 14))
->a : Symbol(a, Decl(declarationsAndAssignments.ts, 166, 7), Decl(declarationsAndAssignments.ts, 170, 9), Decl(declarationsAndAssignments.ts, 171, 11), Decl(declarationsAndAssignments.ts, 172, 14), Decl(declarationsAndAssignments.ts, 173, 17))
+    var [x, y, z, ...a3] = [1, "hello", true];
+>x : Symbol(x, Decl(declarationsAndAssignments.ts, 167, 7), Decl(declarationsAndAssignments.ts, 175, 9), Decl(declarationsAndAssignments.ts, 176, 9), Decl(declarationsAndAssignments.ts, 177, 9))
+>y : Symbol(y, Decl(declarationsAndAssignments.ts, 168, 7), Decl(declarationsAndAssignments.ts, 176, 11), Decl(declarationsAndAssignments.ts, 177, 11))
+>z : Symbol(z, Decl(declarationsAndAssignments.ts, 169, 7), Decl(declarationsAndAssignments.ts, 177, 14))
+>a3 : Symbol(a3, Decl(declarationsAndAssignments.ts, 173, 7), Decl(declarationsAndAssignments.ts, 177, 17))
 
-    [...a] = [1, "hello", true];
->a : Symbol(a, Decl(declarationsAndAssignments.ts, 166, 7), Decl(declarationsAndAssignments.ts, 170, 9), Decl(declarationsAndAssignments.ts, 171, 11), Decl(declarationsAndAssignments.ts, 172, 14), Decl(declarationsAndAssignments.ts, 173, 17))
+    [...a0] = [1, "hello", true];
+>a0 : Symbol(a0, Decl(declarationsAndAssignments.ts, 170, 7), Decl(declarationsAndAssignments.ts, 174, 9))
 
-    [x, ...a] = [1, "hello", true];
->x : Symbol(x, Decl(declarationsAndAssignments.ts, 167, 7), Decl(declarationsAndAssignments.ts, 171, 9), Decl(declarationsAndAssignments.ts, 172, 9), Decl(declarationsAndAssignments.ts, 173, 9))
->a : Symbol(a, Decl(declarationsAndAssignments.ts, 166, 7), Decl(declarationsAndAssignments.ts, 170, 9), Decl(declarationsAndAssignments.ts, 171, 11), Decl(declarationsAndAssignments.ts, 172, 14), Decl(declarationsAndAssignments.ts, 173, 17))
+    [x, ...a1] = [1, "hello", true];
+>x : Symbol(x, Decl(declarationsAndAssignments.ts, 167, 7), Decl(declarationsAndAssignments.ts, 175, 9), Decl(declarationsAndAssignments.ts, 176, 9), Decl(declarationsAndAssignments.ts, 177, 9))
+>a1 : Symbol(a1, Decl(declarationsAndAssignments.ts, 171, 7), Decl(declarationsAndAssignments.ts, 175, 11))
 
-    [x, y, ...a] = [1, "hello", true];
->x : Symbol(x, Decl(declarationsAndAssignments.ts, 167, 7), Decl(declarationsAndAssignments.ts, 171, 9), Decl(declarationsAndAssignments.ts, 172, 9), Decl(declarationsAndAssignments.ts, 173, 9))
->y : Symbol(y, Decl(declarationsAndAssignments.ts, 168, 7), Decl(declarationsAndAssignments.ts, 172, 11), Decl(declarationsAndAssignments.ts, 173, 11))
->a : Symbol(a, Decl(declarationsAndAssignments.ts, 166, 7), Decl(declarationsAndAssignments.ts, 170, 9), Decl(declarationsAndAssignments.ts, 171, 11), Decl(declarationsAndAssignments.ts, 172, 14), Decl(declarationsAndAssignments.ts, 173, 17))
+    [x, y, ...a2] = [1, "hello", true];
+>x : Symbol(x, Decl(declarationsAndAssignments.ts, 167, 7), Decl(declarationsAndAssignments.ts, 175, 9), Decl(declarationsAndAssignments.ts, 176, 9), Decl(declarationsAndAssignments.ts, 177, 9))
+>y : Symbol(y, Decl(declarationsAndAssignments.ts, 168, 7), Decl(declarationsAndAssignments.ts, 176, 11), Decl(declarationsAndAssignments.ts, 177, 11))
+>a2 : Symbol(a2, Decl(declarationsAndAssignments.ts, 172, 7), Decl(declarationsAndAssignments.ts, 176, 14))
 
-    [x, y, z, ...a] = [1, "hello", true];
->x : Symbol(x, Decl(declarationsAndAssignments.ts, 167, 7), Decl(declarationsAndAssignments.ts, 171, 9), Decl(declarationsAndAssignments.ts, 172, 9), Decl(declarationsAndAssignments.ts, 173, 9))
->y : Symbol(y, Decl(declarationsAndAssignments.ts, 168, 7), Decl(declarationsAndAssignments.ts, 172, 11), Decl(declarationsAndAssignments.ts, 173, 11))
->z : Symbol(z, Decl(declarationsAndAssignments.ts, 169, 7), Decl(declarationsAndAssignments.ts, 173, 14))
->a : Symbol(a, Decl(declarationsAndAssignments.ts, 166, 7), Decl(declarationsAndAssignments.ts, 170, 9), Decl(declarationsAndAssignments.ts, 171, 11), Decl(declarationsAndAssignments.ts, 172, 14), Decl(declarationsAndAssignments.ts, 173, 17))
+    [x, y, z, ...a3] = [1, "hello", true];
+>x : Symbol(x, Decl(declarationsAndAssignments.ts, 167, 7), Decl(declarationsAndAssignments.ts, 175, 9), Decl(declarationsAndAssignments.ts, 176, 9), Decl(declarationsAndAssignments.ts, 177, 9))
+>y : Symbol(y, Decl(declarationsAndAssignments.ts, 168, 7), Decl(declarationsAndAssignments.ts, 176, 11), Decl(declarationsAndAssignments.ts, 177, 11))
+>z : Symbol(z, Decl(declarationsAndAssignments.ts, 169, 7), Decl(declarationsAndAssignments.ts, 177, 14))
+>a3 : Symbol(a3, Decl(declarationsAndAssignments.ts, 173, 7), Decl(declarationsAndAssignments.ts, 177, 17))
 }
 
diff --git a/tests/baselines/reference/declarationsAndAssignments.types b/tests/baselines/reference/declarationsAndAssignments.types
index 10571cf431232..602ffbd76eb0d 100644
--- a/tests/baselines/reference/declarationsAndAssignments.types
+++ b/tests/baselines/reference/declarationsAndAssignments.types
@@ -24,7 +24,7 @@ function f0() {
 >x : number
 >y : string
 >z : any
->[1, "hello"] : [number, string, undefined]
+>[1, "hello"] : [number, string, undefined?]
 >1 : 1
 >"hello" : "hello"
 
@@ -254,17 +254,17 @@ function f7() {
 function f8() {
 >f8 : () => void
 
-    var [a, b, c] = [];   // Ok, [] is an array
+    var [a, b, c] = [];   // Error, [] is an empty tuple
 >a : any
 >b : any
 >c : any
->[] : [undefined, undefined, undefined]
+>[] : [undefined?, undefined?, undefined?]
 
     var [d, e, f] = [1];  // Error, [1] is a tuple
 >d : number
 >e : any
 >f : any
->[1] : [number, undefined, undefined]
+>[1] : [number, undefined?, undefined?]
 >1 : 1
 }
 
@@ -681,9 +681,6 @@ function f19() {
 function f20() {
 >f20 : () => void
 
-    var a: number[];
->a : number[]
-
     var x: number;
 >x : number
 
@@ -693,6 +690,12 @@ function f20() {
     var z: number;
 >z : number
 
+    var a: number[];
+>a : number[]
+
+    var a3: any[];
+>a3 : any[]
+
     var [...a] = [1, 2, 3];
 >a : number[]
 >[1, 2, 3] : number[]
@@ -703,7 +706,7 @@ function f20() {
     var [x, ...a] = [1, 2, 3];
 >x : number
 >a : number[]
->[1, 2, 3] : number[]
+>[1, 2, 3] : [number, number, number]
 >1 : 1
 >2 : 2
 >3 : 3
@@ -712,17 +715,17 @@ function f20() {
 >x : number
 >y : number
 >a : number[]
->[1, 2, 3] : number[]
+>[1, 2, 3] : [number, number, number]
 >1 : 1
 >2 : 2
 >3 : 3
 
-    var [x, y, z, ...a] = [1, 2, 3];
+    var [x, y, z, ...a3] = [1, 2, 3];
 >x : number
 >y : number
 >z : number
->a : number[]
->[1, 2, 3] : number[]
+>a3 : any[]
+>[1, 2, 3] : [number, number, number]
 >1 : 1
 >2 : 2
 >3 : 3
@@ -738,37 +741,37 @@ function f20() {
 >3 : 3
 
     [x, ...a] = [1, 2, 3];
->[x, ...a] = [1, 2, 3] : number[]
->[x, ...a] : number[]
+>[x, ...a] = [1, 2, 3] : [number, number, number]
+>[x, ...a] : [number, ...number[]]
 >x : number
 >...a : number
 >a : number[]
->[1, 2, 3] : number[]
+>[1, 2, 3] : [number, number, number]
 >1 : 1
 >2 : 2
 >3 : 3
 
     [x, y, ...a] = [1, 2, 3];
->[x, y, ...a] = [1, 2, 3] : number[]
->[x, y, ...a] : number[]
+>[x, y, ...a] = [1, 2, 3] : [number, number, number]
+>[x, y, ...a] : [number, number, ...number[]]
 >x : number
 >y : number
 >...a : number
 >a : number[]
->[1, 2, 3] : number[]
+>[1, 2, 3] : [number, number, number]
 >1 : 1
 >2 : 2
 >3 : 3
 
-    [x, y, z, ...a] = [1, 2, 3];
->[x, y, z, ...a] = [1, 2, 3] : number[]
->[x, y, z, ...a] : number[]
+    [x, y, z, ...a3] = [1, 2, 3];
+>[x, y, z, ...a3] = [1, 2, 3] : [number, number, number]
+>[x, y, z, ...a3] : [number, number, number, ...any[]]
 >x : number
 >y : number
 >z : number
->...a : number
->a : number[]
->[1, 2, 3] : number[]
+>...a3 : any
+>a3 : any[]
+>[1, 2, 3] : [number, number, number]
 >1 : 1
 >2 : 2
 >3 : 3
@@ -777,94 +780,103 @@ function f20() {
 function f21() {
 >f21 : () => void
 
-    var a: (number | string | boolean)[];
->a : (string | number | boolean)[]
+    var x: number;
+>x : number
 
-    var x: number | string | boolean;
->x : string | number | boolean
+    var y: string;
+>y : string
 
-    var y: number | string | boolean;
->y : string | number | boolean
+    var z: boolean;
+>z : boolean
 
-    var z: number | string | boolean;
->z : string | number | boolean
+    var a0: (number | string | boolean)[];
+>a0 : (string | number | boolean)[]
 
-    var [...a] = [1, "hello", true];
->a : (string | number | boolean)[]
+    var a1: (string | boolean)[];
+>a1 : (string | boolean)[]
+
+    var a2: boolean[];
+>a2 : boolean[]
+
+    var a3: any[];
+>a3 : any[]
+
+    var [...a0] = [1, "hello", true];
+>a0 : (string | number | boolean)[]
 >[1, "hello", true] : (string | number | boolean)[]
 >1 : 1
 >"hello" : "hello"
 >true : true
 
-    var [x, ...a] = [1, "hello", true];
->x : string | number | boolean
->a : (string | number | boolean)[]
->[1, "hello", true] : (string | number | boolean)[]
+    var [x, ...a1] = [1, "hello", true];
+>x : number
+>a1 : (string | boolean)[]
+>[1, "hello", true] : [number, string, boolean]
 >1 : 1
 >"hello" : "hello"
 >true : true
 
-    var [x, y, ...a] = [1, "hello", true];
->x : string | number | boolean
->y : string | number | boolean
->a : (string | number | boolean)[]
->[1, "hello", true] : (string | number | boolean)[]
+    var [x, y, ...a2] = [1, "hello", true];
+>x : number
+>y : string
+>a2 : boolean[]
+>[1, "hello", true] : [number, string, boolean]
 >1 : 1
 >"hello" : "hello"
 >true : true
 
-    var [x, y, z, ...a] = [1, "hello", true];
->x : string | number | boolean
->y : string | number | boolean
->z : string | number | boolean
->a : (string | number | boolean)[]
->[1, "hello", true] : (string | number | boolean)[]
+    var [x, y, z, ...a3] = [1, "hello", true];
+>x : number
+>y : string
+>z : boolean
+>a3 : any[]
+>[1, "hello", true] : [number, string, boolean]
 >1 : 1
 >"hello" : "hello"
 >true : true
 
-    [...a] = [1, "hello", true];
->[...a] = [1, "hello", true] : (string | number | true)[]
->[...a] : (string | number | boolean)[]
->...a : string | number | boolean
->a : (string | number | boolean)[]
+    [...a0] = [1, "hello", true];
+>[...a0] = [1, "hello", true] : (string | number | true)[]
+>[...a0] : (string | number | boolean)[]
+>...a0 : string | number | boolean
+>a0 : (string | number | boolean)[]
 >[1, "hello", true] : (string | number | true)[]
 >1 : 1
 >"hello" : "hello"
 >true : true
 
-    [x, ...a] = [1, "hello", true];
->[x, ...a] = [1, "hello", true] : (string | number | true)[]
->[x, ...a] : (string | number | boolean)[]
->x : string | number | boolean
->...a : string | number | boolean
->a : (string | number | boolean)[]
->[1, "hello", true] : (string | number | true)[]
+    [x, ...a1] = [1, "hello", true];
+>[x, ...a1] = [1, "hello", true] : [number, string, true]
+>[x, ...a1] : [number, ...(string | boolean)[]]
+>x : number
+>...a1 : string | boolean
+>a1 : (string | boolean)[]
+>[1, "hello", true] : [number, string, true]
 >1 : 1
 >"hello" : "hello"
 >true : true
 
-    [x, y, ...a] = [1, "hello", true];
->[x, y, ...a] = [1, "hello", true] : (string | number | true)[]
->[x, y, ...a] : (string | number | boolean)[]
->x : string | number | boolean
->y : string | number | boolean
->...a : string | number | boolean
->a : (string | number | boolean)[]
->[1, "hello", true] : (string | number | true)[]
+    [x, y, ...a2] = [1, "hello", true];
+>[x, y, ...a2] = [1, "hello", true] : [number, string, true]
+>[x, y, ...a2] : [number, string, ...boolean[]]
+>x : number
+>y : string
+>...a2 : boolean
+>a2 : boolean[]
+>[1, "hello", true] : [number, string, true]
 >1 : 1
 >"hello" : "hello"
 >true : true
 
-    [x, y, z, ...a] = [1, "hello", true];
->[x, y, z, ...a] = [1, "hello", true] : (string | number | true)[]
->[x, y, z, ...a] : (string | number | boolean)[]
->x : string | number | boolean
->y : string | number | boolean
->z : string | number | boolean
->...a : string | number | boolean
->a : (string | number | boolean)[]
->[1, "hello", true] : (string | number | true)[]
+    [x, y, z, ...a3] = [1, "hello", true];
+>[x, y, z, ...a3] = [1, "hello", true] : [number, string, true]
+>[x, y, z, ...a3] : [number, string, boolean, ...any[]]
+>x : number
+>y : string
+>z : boolean
+>...a3 : any
+>a3 : any[]
+>[1, "hello", true] : [number, string, true]
 >1 : 1
 >"hello" : "hello"
 >true : true
diff --git a/tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts b/tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts
index 69b7462cd03b9..e45df9c45dfd1 100644
--- a/tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts
+++ b/tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts
@@ -59,7 +59,7 @@ function f7() {
 }
 
 function f8() {
-    var [a, b, c] = [];   // Ok, [] is an array
+    var [a, b, c] = [];   // Error, [] is an empty tuple
     var [d, e, f] = [1];  // Error, [1] is a tuple
 }
 
@@ -149,31 +149,35 @@ function f19() {
 }
 
 function f20() {
-    var a: number[];
     var x: number;
     var y: number;
     var z: number;
+    var a: number[];
+    var a3: any[];
     var [...a] = [1, 2, 3];
     var [x, ...a] = [1, 2, 3];
     var [x, y, ...a] = [1, 2, 3];
-    var [x, y, z, ...a] = [1, 2, 3];
+    var [x, y, z, ...a3] = [1, 2, 3];
     [...a] = [1, 2, 3];
     [x, ...a] = [1, 2, 3];
     [x, y, ...a] = [1, 2, 3];
-    [x, y, z, ...a] = [1, 2, 3];
+    [x, y, z, ...a3] = [1, 2, 3];
 }
 
 function f21() {
-    var a: (number | string | boolean)[];
-    var x: number | string | boolean;
-    var y: number | string | boolean;
-    var z: number | string | boolean;
-    var [...a] = [1, "hello", true];
-    var [x, ...a] = [1, "hello", true];
-    var [x, y, ...a] = [1, "hello", true];
-    var [x, y, z, ...a] = [1, "hello", true];
-    [...a] = [1, "hello", true];
-    [x, ...a] = [1, "hello", true];
-    [x, y, ...a] = [1, "hello", true];
-    [x, y, z, ...a] = [1, "hello", true];
+    var x: number;
+    var y: string;
+    var z: boolean;
+    var a0: (number | string | boolean)[];
+    var a1: (string | boolean)[];
+    var a2: boolean[];
+    var a3: any[];
+    var [...a0] = [1, "hello", true];
+    var [x, ...a1] = [1, "hello", true];
+    var [x, y, ...a2] = [1, "hello", true];
+    var [x, y, z, ...a3] = [1, "hello", true];
+    [...a0] = [1, "hello", true];
+    [x, ...a1] = [1, "hello", true];
+    [x, y, ...a2] = [1, "hello", true];
+    [x, y, z, ...a3] = [1, "hello", true];
 }

From 4037d07a0b2f37d587823d8d13812f56dac6891a Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Thu, 21 Jun 2018 17:21:34 -1000
Subject: [PATCH 26/37] Accept new baselines

---
 ...umentExpressionContextualTyping.errors.txt |  8 +++--
 .../argumentExpressionContextualTyping.types  |  2 +-
 ...teralExpressionContextualTyping.errors.txt | 10 +++---
 ...rayLiteralExpressionContextualTyping.types |  2 +-
 .../reference/arrowFunctionExpressions.types  |  8 ++---
 .../declarationEmitDestructuring3.js          |  4 +--
 .../declarationEmitDestructuring3.types       | 10 +++---
 .../declarationEmitDestructuring5.js          |  6 ++--
 .../declarationEmitDestructuring5.types       |  6 ++--
 ...rationEmitDestructuringArrayPattern2.types |  2 +-
 ...clarationEmitDestructuringArrayPattern4.js |  8 ++---
 ...rationEmitDestructuringArrayPattern4.types | 32 +++++++++----------
 ...ArrayBindingPatternAndAssignment1ES5.types | 26 +++++++--------
 ...dingPatternAndAssignment1ES5iterable.types | 26 +++++++--------
 ...ArrayBindingPatternAndAssignment1ES6.types | 26 +++++++--------
 ...ingArrayBindingPatternAndAssignment2.types |  2 +-
 ...ingArrayBindingPatternAndAssignment3.types |  6 ++--
 ...estructuringParameterDeclaration1ES5.types |  2 +-
 ...ringParameterDeclaration1ES5iterable.types |  2 +-
 ...estructuringParameterDeclaration1ES6.types |  2 +-
 ...tructuringParameterDeclaration2.errors.txt | 18 ++++++-----
 .../destructuringParameterDeclaration2.types  |  4 +--
 ...cturingParameterDeclaration3ES5.errors.txt | 14 +++++++-
 ...estructuringParameterDeclaration3ES5.types | 14 ++++----
 ...arameterDeclaration3ES5iterable.errors.txt | 14 +++++++-
 ...ringParameterDeclaration3ES5iterable.types | 14 ++++----
 ...cturingParameterDeclaration3ES6.errors.txt | 14 +++++++-
 ...estructuringParameterDeclaration3ES6.types | 14 ++++----
 ...destructuringVariableDeclaration1ES5.types | 12 +++----
 ...uringVariableDeclaration1ES5iterable.types | 12 +++----
 ...destructuringVariableDeclaration1ES6.types | 12 +++----
 ...structuringVariableDeclaration2.errors.txt |  8 +----
 .../destructuringVariableDeclaration2.symbols |  1 +
 .../destructuringVariableDeclaration2.types   | 12 +++----
 ...destructuringWithLiteralInitializers.types | 20 ++++++------
 .../reference/downlevelLetConst12.types       |  4 +--
 .../reference/downlevelLetConst16.types       |  4 +--
 ...indingElementInParameterDeclaration1.types |  2 +-
 ...indingElementInParameterDeclaration2.types |  2 +-
 .../reference/emitArrowFunctionES6.types      |  8 ++---
 tests/baselines/reference/for-of49.types      |  2 +-
 ...tializedDestructuringAssignmentTypes.types |  2 +-
 .../iterableArrayPattern13.errors.txt         | 25 +++++++++++++++
 .../reference/iterableArrayPattern13.types    |  4 +--
 .../reference/iterableArrayPattern24.types    |  2 +-
 .../reference/iterableArrayPattern4.types     |  2 +-
 .../reference/iterableArrayPattern6.types     |  2 +-
 .../reference/iterableArrayPattern8.types     |  2 +-
 ...AnyDestructuringParameterDeclaration.types |  2 +-
 ...plicitAnyDestructuringVarDeclaration.types |  2 +-
 .../reference/objectRestAssignment.types      |  6 ++--
 .../reference/recursiveLetConst.types         |  2 +-
 ...nDestructuringForArrayBindingPattern.types | 12 +++----
 ...DestructuringForArrayBindingPattern2.types |  6 ++--
 ...gForArrayBindingPatternDefaultValues.types | 12 +++----
 ...ForArrayBindingPatternDefaultValues2.types |  6 ++--
 ...estructuringForOfArrayBindingPattern.types |  6 ++--
 ...structuringForOfArrayBindingPattern2.types |  6 ++--
 ...orOfArrayBindingPatternDefaultValues.types |  6 ++--
 ...rOfArrayBindingPatternDefaultValues2.types |  6 ++--
 ...cturingParametertArrayBindingPattern.types |  4 +--
 ...tertArrayBindingPatternDefaultValues.types |  4 +--
 ...VariableStatementArrayBindingPattern.types |  2 +-
 ...ariableStatementArrayBindingPattern3.types |  6 ++--
 ...mentArrayBindingPatternDefaultValues.types |  2 +-
 ...entArrayBindingPatternDefaultValues3.types | 24 +++++++-------
 66 files changed, 306 insertions(+), 242 deletions(-)
 create mode 100644 tests/baselines/reference/iterableArrayPattern13.errors.txt

diff --git a/tests/baselines/reference/argumentExpressionContextualTyping.errors.txt b/tests/baselines/reference/argumentExpressionContextualTyping.errors.txt
index c1bac0fb1ffbc..87c3a6d0b37a3 100644
--- a/tests/baselines/reference/argumentExpressionContextualTyping.errors.txt
+++ b/tests/baselines/reference/argumentExpressionContextualTyping.errors.txt
@@ -1,6 +1,8 @@
 tests/cases/conformance/expressions/contextualTyping/argumentExpressionContextualTyping.ts(16,5): error TS2345: Argument of type '(string | number | boolean)[]' is not assignable to parameter of type '[string, number, boolean]'.
   Property '0' is missing in type '(string | number | boolean)[]'.
-tests/cases/conformance/expressions/contextualTyping/argumentExpressionContextualTyping.ts(17,5): error TS2345: Argument of type '(string | number | boolean)[]' is not assignable to parameter of type '[string, number, boolean]'.
+tests/cases/conformance/expressions/contextualTyping/argumentExpressionContextualTyping.ts(17,5): error TS2345: Argument of type '[string, number, true, ...(string | number | boolean)[]]' is not assignable to parameter of type '[string, number, boolean]'.
+  Types of property 'length' are incompatible.
+    Type 'number' is not assignable to type '3'.
 tests/cases/conformance/expressions/contextualTyping/argumentExpressionContextualTyping.ts(18,5): error TS2345: Argument of type '{ x: (string | number)[]; y: { c: boolean; d: string; e: number; }; }' is not assignable to parameter of type '{ x: [any, any]; y: { c: any; d: any; e: any; }; }'.
   Types of property 'x' are incompatible.
     Type '(string | number)[]' is not assignable to type '[any, any]'.
@@ -29,7 +31,9 @@ tests/cases/conformance/expressions/contextualTyping/argumentExpressionContextua
 !!! error TS2345:   Property '0' is missing in type '(string | number | boolean)[]'.
     baz(["string", 1, true, ...array]);  // Error
         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS2345: Argument of type '(string | number | boolean)[]' is not assignable to parameter of type '[string, number, boolean]'.
+!!! error TS2345: Argument of type '[string, number, true, ...(string | number | boolean)[]]' is not assignable to parameter of type '[string, number, boolean]'.
+!!! error TS2345:   Types of property 'length' are incompatible.
+!!! error TS2345:     Type 'number' is not assignable to type '3'.
     foo(o);                              // Error because x has an array type namely (string|number)[]
         ~
 !!! error TS2345: Argument of type '{ x: (string | number)[]; y: { c: boolean; d: string; e: number; }; }' is not assignable to parameter of type '{ x: [any, any]; y: { c: any; d: any; e: any; }; }'.
diff --git a/tests/baselines/reference/argumentExpressionContextualTyping.types b/tests/baselines/reference/argumentExpressionContextualTyping.types
index 9a7d3f97d5b74..46ef3a3857027 100644
--- a/tests/baselines/reference/argumentExpressionContextualTyping.types
+++ b/tests/baselines/reference/argumentExpressionContextualTyping.types
@@ -11,7 +11,7 @@ function foo({x: [a, b], y: {c, d, e}}) { }
 >e : any
 
 function bar({x: [a, b = 10], y: {c, d, e = { f:1 }}}) { }
->bar : ({ x: [a, b], y: { c, d, e } }: { x: [any, number]; y: { c: any; d: any; e?: { f: number; }; }; }) => void
+>bar : ({ x: [a, b], y: { c, d, e } }: { x: [any, number?]; y: { c: any; d: any; e?: { f: number; }; }; }) => void
 >x : any
 >a : any
 >b : number
diff --git a/tests/baselines/reference/arrayLiteralExpressionContextualTyping.errors.txt b/tests/baselines/reference/arrayLiteralExpressionContextualTyping.errors.txt
index 8cb36b113a754..e2d047ac711c1 100644
--- a/tests/baselines/reference/arrayLiteralExpressionContextualTyping.errors.txt
+++ b/tests/baselines/reference/arrayLiteralExpressionContextualTyping.errors.txt
@@ -7,8 +7,9 @@ tests/cases/conformance/expressions/contextualTyping/arrayLiteralExpressionConte
 tests/cases/conformance/expressions/contextualTyping/arrayLiteralExpressionContextualTyping.ts(8,5): error TS2322: Type '[number, number, number, string]' is not assignable to type '[number, number, number]'.
   Types of property 'length' are incompatible.
     Type '4' is not assignable to type '3'.
-tests/cases/conformance/expressions/contextualTyping/arrayLiteralExpressionContextualTyping.ts(14,5): error TS2322: Type 'number[]' is not assignable to type '[number, number, number]'.
-  Property '0' is missing in type 'number[]'.
+tests/cases/conformance/expressions/contextualTyping/arrayLiteralExpressionContextualTyping.ts(14,5): error TS2322: Type '[number, number, number, ...number[]]' is not assignable to type '[number, number, number]'.
+  Types of property 'length' are incompatible.
+    Type 'number' is not assignable to type '3'.
 
 
 ==== tests/cases/conformance/expressions/contextualTyping/arrayLiteralExpressionContextualTyping.ts (4 errors) ====
@@ -39,6 +40,7 @@ tests/cases/conformance/expressions/contextualTyping/arrayLiteralExpressionConte
     var spr1 = [1, 2, 3, ...tup];
     var spr2:[number, number, number] = [1, 2, 3, ...tup];  // Error
         ~~~~
-!!! error TS2322: Type 'number[]' is not assignable to type '[number, number, number]'.
-!!! error TS2322:   Property '0' is missing in type 'number[]'.
+!!! error TS2322: Type '[number, number, number, ...number[]]' is not assignable to type '[number, number, number]'.
+!!! error TS2322:   Types of property 'length' are incompatible.
+!!! error TS2322:     Type 'number' is not assignable to type '3'.
     
\ No newline at end of file
diff --git a/tests/baselines/reference/arrayLiteralExpressionContextualTyping.types b/tests/baselines/reference/arrayLiteralExpressionContextualTyping.types
index 5954448c984fb..3c1a9b6ba722b 100644
--- a/tests/baselines/reference/arrayLiteralExpressionContextualTyping.types
+++ b/tests/baselines/reference/arrayLiteralExpressionContextualTyping.types
@@ -62,7 +62,7 @@ var spr1 = [1, 2, 3, ...tup];
 
 var spr2:[number, number, number] = [1, 2, 3, ...tup];  // Error
 >spr2 : [number, number, number]
->[1, 2, 3, ...tup] : number[]
+>[1, 2, 3, ...tup] : [number, number, number, ...number[]]
 >1 : 1
 >2 : 2
 >3 : 3
diff --git a/tests/baselines/reference/arrowFunctionExpressions.types b/tests/baselines/reference/arrowFunctionExpressions.types
index 0de6c674d18dc..9eb9b09181369 100644
--- a/tests/baselines/reference/arrowFunctionExpressions.types
+++ b/tests/baselines/reference/arrowFunctionExpressions.types
@@ -71,14 +71,14 @@ var p3 = ([, a]) => { };
 >a : any
 
 var p4 = ([, ...a]) => { };
->p4 : ([, ...a]: any[]) => void
->([, ...a]) => { } : ([, ...a]: any[]) => void
+>p4 : ([, ...a]: [any?, ...any[]]) => void
+>([, ...a]) => { } : ([, ...a]: [any?, ...any[]]) => void
 > : undefined
 >a : any[]
 
 var p5 = ([a = 1]) => { };
->p5 : ([a]: [number]) => void
->([a = 1]) => { } : ([a]: [number]) => void
+>p5 : ([a]: [number?]) => void
+>([a = 1]) => { } : ([a]: [number?]) => void
 >a : number
 >1 : 1
 
diff --git a/tests/baselines/reference/declarationEmitDestructuring3.js b/tests/baselines/reference/declarationEmitDestructuring3.js
index b21c63203c894..63b90f5d41d72 100644
--- a/tests/baselines/reference/declarationEmitDestructuring3.js
+++ b/tests/baselines/reference/declarationEmitDestructuring3.js
@@ -14,5 +14,5 @@ function foo(_a) {
 
 
 //// [declarationEmitDestructuring3.d.ts]
-declare function bar([x, z, ...w]: any[]): void;
-declare function foo([x, ...y]?: (string | number | boolean)[]): void;
+declare function bar([x, z, ...w]: [any, any, ...any[]]): void;
+declare function foo([x, ...y]?: [number, string, boolean]): void;
diff --git a/tests/baselines/reference/declarationEmitDestructuring3.types b/tests/baselines/reference/declarationEmitDestructuring3.types
index 8e15071c9792f..537de8e1e7450 100644
--- a/tests/baselines/reference/declarationEmitDestructuring3.types
+++ b/tests/baselines/reference/declarationEmitDestructuring3.types
@@ -1,15 +1,15 @@
 === tests/cases/compiler/declarationEmitDestructuring3.ts ===
 function bar([x, z, ...w]) { }
->bar : ([x, z, ...w]: any[]) => void
+>bar : ([x, z, ...w]: [any, any, ...any[]]) => void
 >x : any
 >z : any
 >w : any[]
 
 function foo([x, ...y] = [1, "string", true]) { }
->foo : ([x, ...y]?: (string | number | boolean)[]) => void
->x : string | number | boolean
->y : (string | number | boolean)[]
->[1, "string", true] : (string | number | boolean)[]
+>foo : ([x, ...y]?: [number, string, boolean]) => void
+>x : number
+>y : (string | boolean)[]
+>[1, "string", true] : [number, string, boolean]
 >1 : 1
 >"string" : "string"
 >true : true
diff --git a/tests/baselines/reference/declarationEmitDestructuring5.js b/tests/baselines/reference/declarationEmitDestructuring5.js
index e5089bb209767..06a57a8ca2702 100644
--- a/tests/baselines/reference/declarationEmitDestructuring5.js
+++ b/tests/baselines/reference/declarationEmitDestructuring5.js
@@ -24,8 +24,8 @@ function bar2(_a) {
 
 
 //// [declarationEmitDestructuring5.d.ts]
-declare function baz([, z, ,]: [any, any, any]): void;
+declare function baz([, z, ,]: [any, any, any?]): void;
 declare function foo([, b,]: [any, any]): void;
-declare function bar([z, , ,]: [any, any, any]): void;
+declare function bar([z, , ,]: [any, any?, any?]): void;
 declare function bar1([z, , ,]?: [number, number, number, number, number]): void;
-declare function bar2([, , z, , ,]: [any, any, any, any, any]): void;
+declare function bar2([, , z, , ,]: [any, any, any, any?, any?]): void;
diff --git a/tests/baselines/reference/declarationEmitDestructuring5.types b/tests/baselines/reference/declarationEmitDestructuring5.types
index c0223a0f061dd..770779fdb2fc9 100644
--- a/tests/baselines/reference/declarationEmitDestructuring5.types
+++ b/tests/baselines/reference/declarationEmitDestructuring5.types
@@ -1,6 +1,6 @@
 === tests/cases/compiler/declarationEmitDestructuring5.ts ===
 function baz([, z, , ]) { }
->baz : ([, z, ,]: [any, any, any]) => void
+>baz : ([, z, ,]: [any, any, any?]) => void
 > : undefined
 >z : any
 > : undefined
@@ -11,7 +11,7 @@ function foo([, b, ]: [any, any]): void { }
 >b : any
 
 function bar([z, , , ]) { }
->bar : ([z, , ,]: [any, any, any]) => void
+>bar : ([z, , ,]: [any, any?, any?]) => void
 >z : any
 > : undefined
 > : undefined
@@ -29,7 +29,7 @@ function bar1([z, , , ] = [1, 3, 4, 6, 7]) { }
 >7 : 7
 
 function bar2([,,z, , , ]) { }
->bar2 : ([, , z, , ,]: [any, any, any, any, any]) => void
+>bar2 : ([, , z, , ,]: [any, any, any, any?, any?]) => void
 > : undefined
 > : undefined
 >z : any
diff --git a/tests/baselines/reference/declarationEmitDestructuringArrayPattern2.types b/tests/baselines/reference/declarationEmitDestructuringArrayPattern2.types
index 097cab978d5c3..37781e0a1aefb 100644
--- a/tests/baselines/reference/declarationEmitDestructuringArrayPattern2.types
+++ b/tests/baselines/reference/declarationEmitDestructuringArrayPattern2.types
@@ -23,7 +23,7 @@ var [a11, b11, c11] = [];
 >a11 : any
 >b11 : any
 >c11 : any
->[] : [undefined, undefined, undefined]
+>[] : [undefined?, undefined?, undefined?]
 
 var [a2, [b2, { x12, y12: c2 }]=["abc", { x12: 10, y12: false }]] = [1, ["hello", { x12: 5, y12: true }]];
 >a2 : number
diff --git a/tests/baselines/reference/declarationEmitDestructuringArrayPattern4.js b/tests/baselines/reference/declarationEmitDestructuringArrayPattern4.js
index 1bd07e7b974e8..f0438ba5a8a36 100644
--- a/tests/baselines/reference/declarationEmitDestructuringArrayPattern4.js
+++ b/tests/baselines/reference/declarationEmitDestructuringArrayPattern4.js
@@ -24,8 +24,8 @@ var _f = [1, "hello", true], x19 = _f[0], y19 = _f[1], z19 = _f[2], a13 = _f.sli
 declare var a5: number[];
 declare var x14: number, a6: number[];
 declare var x15: number, y15: number, a7: number[];
-declare var x16: number, y16: number, z16: number, a8: number[];
+declare var x16: number, y16: number, z16: number, a8: any[];
 declare var a9: (string | number | boolean)[];
-declare var x17: string | number | boolean, a10: (string | number | boolean)[];
-declare var x18: string | number | boolean, y18: string | number | boolean, a12: (string | number | boolean)[];
-declare var x19: string | number | boolean, y19: string | number | boolean, z19: string | number | boolean, a13: (string | number | boolean)[];
+declare var x17: number, a10: (string | boolean)[];
+declare var x18: number, y18: string, a12: boolean[];
+declare var x19: number, y19: string, z19: boolean, a13: any[];
diff --git a/tests/baselines/reference/declarationEmitDestructuringArrayPattern4.types b/tests/baselines/reference/declarationEmitDestructuringArrayPattern4.types
index 0141b3f79e709..52c292997a918 100644
--- a/tests/baselines/reference/declarationEmitDestructuringArrayPattern4.types
+++ b/tests/baselines/reference/declarationEmitDestructuringArrayPattern4.types
@@ -9,7 +9,7 @@ var [...a5] = [1, 2, 3];
 var [x14, ...a6] = [1, 2, 3];
 >x14 : number
 >a6 : number[]
->[1, 2, 3] : number[]
+>[1, 2, 3] : [number, number, number]
 >1 : 1
 >2 : 2
 >3 : 3
@@ -18,7 +18,7 @@ var [x15, y15, ...a7] = [1, 2, 3];
 >x15 : number
 >y15 : number
 >a7 : number[]
->[1, 2, 3] : number[]
+>[1, 2, 3] : [number, number, number]
 >1 : 1
 >2 : 2
 >3 : 3
@@ -27,8 +27,8 @@ var [x16, y16, z16, ...a8] = [1, 2, 3];
 >x16 : number
 >y16 : number
 >z16 : number
->a8 : number[]
->[1, 2, 3] : number[]
+>a8 : any[]
+>[1, 2, 3] : [number, number, number]
 >1 : 1
 >2 : 2
 >3 : 3
@@ -41,28 +41,28 @@ var [...a9] = [1, "hello", true];
 >true : true
 
 var [x17, ...a10] = [1, "hello", true];
->x17 : string | number | boolean
->a10 : (string | number | boolean)[]
->[1, "hello", true] : (string | number | boolean)[]
+>x17 : number
+>a10 : (string | boolean)[]
+>[1, "hello", true] : [number, string, boolean]
 >1 : 1
 >"hello" : "hello"
 >true : true
 
 var [x18, y18, ...a12] = [1, "hello", true];
->x18 : string | number | boolean
->y18 : string | number | boolean
->a12 : (string | number | boolean)[]
->[1, "hello", true] : (string | number | boolean)[]
+>x18 : number
+>y18 : string
+>a12 : boolean[]
+>[1, "hello", true] : [number, string, boolean]
 >1 : 1
 >"hello" : "hello"
 >true : true
 
 var [x19, y19, z19, ...a13] = [1, "hello", true];
->x19 : string | number | boolean
->y19 : string | number | boolean
->z19 : string | number | boolean
->a13 : (string | number | boolean)[]
->[1, "hello", true] : (string | number | boolean)[]
+>x19 : number
+>y19 : string
+>z19 : boolean
+>a13 : any[]
+>[1, "hello", true] : [number, string, boolean]
 >1 : 1
 >"hello" : "hello"
 >true : true
diff --git a/tests/baselines/reference/destructuringArrayBindingPatternAndAssignment1ES5.types b/tests/baselines/reference/destructuringArrayBindingPatternAndAssignment1ES5.types
index 3ad1bfa1dd21d..2d212b1e13e7f 100644
--- a/tests/baselines/reference/destructuringArrayBindingPatternAndAssignment1ES5.types
+++ b/tests/baselines/reference/destructuringArrayBindingPatternAndAssignment1ES5.types
@@ -93,18 +93,18 @@ var [c0, c1] = [...temp];
 
 var [c2] = [];
 >c2 : any
->[] : [undefined]
+>[] : [undefined?]
 
 var [[[c3]], [[[[c4]]]]] = [[[]], [[[[]]]]]
 >c3 : any
 >c4 : any
->[[[]], [[[[]]]]] : [[[undefined]], [[[[undefined]]]]]
->[[]] : [[undefined]]
->[] : [undefined]
->[[[[]]]] : [[[[undefined]]]]
->[[[]]] : [[[undefined]]]
->[[]] : [[undefined]]
->[] : [undefined]
+>[[[]], [[[[]]]]] : [[[undefined?]], [[[[undefined?]]]]]
+>[[]] : [[undefined?]]
+>[] : [undefined?]
+>[[[[]]]] : [[[[undefined?]]]]
+>[[[]]] : [[[undefined?]]]
+>[[]] : [[undefined?]]
+>[] : [undefined?]
 
 var [[c5], c6]: [[string|number], boolean] = [[1], true];
 >c5 : string | number
@@ -149,7 +149,7 @@ var [,,,...c10] = [1, 2, 3, 4, "hello"];
 > : undefined
 > : undefined
 >c10 : (string | number)[]
->[1, 2, 3, 4, "hello"] : (string | number)[]
+>[1, 2, 3, 4, "hello"] : [number, number, number, number, string]
 >1 : 1
 >2 : 2
 >3 : 3
@@ -157,10 +157,10 @@ var [,,,...c10] = [1, 2, 3, 4, "hello"];
 >"hello" : "hello"
 
 var [c11, c12, ...c13] = [1, 2, "string"];
->c11 : string | number
->c12 : string | number
->c13 : (string | number)[]
->[1, 2, "string"] : (string | number)[]
+>c11 : number
+>c12 : number
+>c13 : string[]
+>[1, 2, "string"] : [number, number, string]
 >1 : 1
 >2 : 2
 >"string" : "string"
diff --git a/tests/baselines/reference/destructuringArrayBindingPatternAndAssignment1ES5iterable.types b/tests/baselines/reference/destructuringArrayBindingPatternAndAssignment1ES5iterable.types
index 1c46f553d4dfd..8ef92a8875549 100644
--- a/tests/baselines/reference/destructuringArrayBindingPatternAndAssignment1ES5iterable.types
+++ b/tests/baselines/reference/destructuringArrayBindingPatternAndAssignment1ES5iterable.types
@@ -93,18 +93,18 @@ var [c0, c1] = [...temp];
 
 var [c2] = [];
 >c2 : any
->[] : [undefined]
+>[] : [undefined?]
 
 var [[[c3]], [[[[c4]]]]] = [[[]], [[[[]]]]]
 >c3 : any
 >c4 : any
->[[[]], [[[[]]]]] : [[[undefined]], [[[[undefined]]]]]
->[[]] : [[undefined]]
->[] : [undefined]
->[[[[]]]] : [[[[undefined]]]]
->[[[]]] : [[[undefined]]]
->[[]] : [[undefined]]
->[] : [undefined]
+>[[[]], [[[[]]]]] : [[[undefined?]], [[[[undefined?]]]]]
+>[[]] : [[undefined?]]
+>[] : [undefined?]
+>[[[[]]]] : [[[[undefined?]]]]
+>[[[]]] : [[[undefined?]]]
+>[[]] : [[undefined?]]
+>[] : [undefined?]
 
 var [[c5], c6]: [[string|number], boolean] = [[1], true];
 >c5 : string | number
@@ -149,7 +149,7 @@ var [,,,...c10] = [1, 2, 3, 4, "hello"];
 > : undefined
 > : undefined
 >c10 : (string | number)[]
->[1, 2, 3, 4, "hello"] : (string | number)[]
+>[1, 2, 3, 4, "hello"] : [number, number, number, number, string]
 >1 : 1
 >2 : 2
 >3 : 3
@@ -157,10 +157,10 @@ var [,,,...c10] = [1, 2, 3, 4, "hello"];
 >"hello" : "hello"
 
 var [c11, c12, ...c13] = [1, 2, "string"];
->c11 : string | number
->c12 : string | number
->c13 : (string | number)[]
->[1, 2, "string"] : (string | number)[]
+>c11 : number
+>c12 : number
+>c13 : string[]
+>[1, 2, "string"] : [number, number, string]
 >1 : 1
 >2 : 2
 >"string" : "string"
diff --git a/tests/baselines/reference/destructuringArrayBindingPatternAndAssignment1ES6.types b/tests/baselines/reference/destructuringArrayBindingPatternAndAssignment1ES6.types
index 3a51965df3161..7767cadee5a78 100644
--- a/tests/baselines/reference/destructuringArrayBindingPatternAndAssignment1ES6.types
+++ b/tests/baselines/reference/destructuringArrayBindingPatternAndAssignment1ES6.types
@@ -93,18 +93,18 @@ var [c0, c1] = [...temp];
 
 var [c2] = [];
 >c2 : any
->[] : [undefined]
+>[] : [undefined?]
 
 var [[[c3]], [[[[c4]]]]] = [[[]], [[[[]]]]]
 >c3 : any
 >c4 : any
->[[[]], [[[[]]]]] : [[[undefined]], [[[[undefined]]]]]
->[[]] : [[undefined]]
->[] : [undefined]
->[[[[]]]] : [[[[undefined]]]]
->[[[]]] : [[[undefined]]]
->[[]] : [[undefined]]
->[] : [undefined]
+>[[[]], [[[[]]]]] : [[[undefined?]], [[[[undefined?]]]]]
+>[[]] : [[undefined?]]
+>[] : [undefined?]
+>[[[[]]]] : [[[[undefined?]]]]
+>[[[]]] : [[[undefined?]]]
+>[[]] : [[undefined?]]
+>[] : [undefined?]
 
 var [[c5], c6]: [[string|number], boolean] = [[1], true];
 >c5 : string | number
@@ -149,7 +149,7 @@ var [,,,...c10] = [1, 2, 3, 4, "hello"];
 > : undefined
 > : undefined
 >c10 : (string | number)[]
->[1, 2, 3, 4, "hello"] : (string | number)[]
+>[1, 2, 3, 4, "hello"] : [number, number, number, number, string]
 >1 : 1
 >2 : 2
 >3 : 3
@@ -157,10 +157,10 @@ var [,,,...c10] = [1, 2, 3, 4, "hello"];
 >"hello" : "hello"
 
 var [c11, c12, ...c13] = [1, 2, "string"];
->c11 : string | number
->c12 : string | number
->c13 : (string | number)[]
->[1, 2, "string"] : (string | number)[]
+>c11 : number
+>c12 : number
+>c13 : string[]
+>[1, 2, "string"] : [number, number, string]
 >1 : 1
 >2 : 2
 >"string" : "string"
diff --git a/tests/baselines/reference/destructuringArrayBindingPatternAndAssignment2.types b/tests/baselines/reference/destructuringArrayBindingPatternAndAssignment2.types
index 1a8eb31fd80b3..97ccf4930e6af 100644
--- a/tests/baselines/reference/destructuringArrayBindingPatternAndAssignment2.types
+++ b/tests/baselines/reference/destructuringArrayBindingPatternAndAssignment2.types
@@ -4,7 +4,7 @@
 var [[a0], [[a1]]] = []         // Error
 >a0 : any
 >a1 : any
->[] : [undefined, undefined]
+>[] : [undefined?, undefined?]
 
 var [[a2], [[a3]]] = undefined  // Error
 >a2 : any
diff --git a/tests/baselines/reference/destructuringArrayBindingPatternAndAssignment3.types b/tests/baselines/reference/destructuringArrayBindingPatternAndAssignment3.types
index 542a8ad1b3610..0fb81ba6aa308 100644
--- a/tests/baselines/reference/destructuringArrayBindingPatternAndAssignment3.types
+++ b/tests/baselines/reference/destructuringArrayBindingPatternAndAssignment3.types
@@ -3,7 +3,7 @@ const [a, b = a] = [1]; // ok
 >a : any
 >b : any
 >a : any
->[1] : [number, any]
+>[1] : [number, any?]
 >1 : 1
 
 const [c, d = c, e = e] = [1]; // error for e = e
@@ -12,7 +12,7 @@ const [c, d = c, e = e] = [1]; // error for e = e
 >c : any
 >e : any
 >e : any
->[1] : [number, any, any]
+>[1] : [number, any?, any?]
 >1 : 1
 
 const [f, g = f, h = i, i = f] = [1]; // error for h = i
@@ -23,7 +23,7 @@ const [f, g = f, h = i, i = f] = [1]; // error for h = i
 >i : any
 >i : any
 >f : any
->[1] : [number, any, any, any]
+>[1] : [number, any?, any?, any?]
 >1 : 1
 
 (function ([a, b = a]) { // ok
diff --git a/tests/baselines/reference/destructuringParameterDeclaration1ES5.types b/tests/baselines/reference/destructuringParameterDeclaration1ES5.types
index c7a5c44f1d46d..5977fb4bea2ab 100644
--- a/tests/baselines/reference/destructuringParameterDeclaration1ES5.types
+++ b/tests/baselines/reference/destructuringParameterDeclaration1ES5.types
@@ -229,7 +229,7 @@ function c5([a, b, [[c]]]) { }
 >c : any
 
 function c6([a, b, [[c=1]]]) { }
->c6 : ([a, b, [[c]]]: [any, any, [[number]]]) => void
+>c6 : ([a, b, [[c]]]: [any, any, [[number?]]]) => void
 >a : any
 >b : any
 >c : number
diff --git a/tests/baselines/reference/destructuringParameterDeclaration1ES5iterable.types b/tests/baselines/reference/destructuringParameterDeclaration1ES5iterable.types
index b41a202758660..7601de8ac92bc 100644
--- a/tests/baselines/reference/destructuringParameterDeclaration1ES5iterable.types
+++ b/tests/baselines/reference/destructuringParameterDeclaration1ES5iterable.types
@@ -229,7 +229,7 @@ function c5([a, b, [[c]]]) { }
 >c : any
 
 function c6([a, b, [[c=1]]]) { }
->c6 : ([a, b, [[c]]]: [any, any, [[number]]]) => void
+>c6 : ([a, b, [[c]]]: [any, any, [[number?]]]) => void
 >a : any
 >b : any
 >c : number
diff --git a/tests/baselines/reference/destructuringParameterDeclaration1ES6.types b/tests/baselines/reference/destructuringParameterDeclaration1ES6.types
index 9de904efdec64..8a6f5d6ca4222 100644
--- a/tests/baselines/reference/destructuringParameterDeclaration1ES6.types
+++ b/tests/baselines/reference/destructuringParameterDeclaration1ES6.types
@@ -212,7 +212,7 @@ function c5([a, b, [[c]]]) { }
 >c : any
 
 function c6([a, b, [[c=1]]]) { }
->c6 : ([a, b, [[c]]]: [any, any, [[number]]]) => void
+>c6 : ([a, b, [[c]]]: [any, any, [[number?]]]) => void
 >a : any
 >b : any
 >c : number
diff --git a/tests/baselines/reference/destructuringParameterDeclaration2.errors.txt b/tests/baselines/reference/destructuringParameterDeclaration2.errors.txt
index 46a816af349f2..6e4b3f1ad081a 100644
--- a/tests/baselines/reference/destructuringParameterDeclaration2.errors.txt
+++ b/tests/baselines/reference/destructuringParameterDeclaration2.errors.txt
@@ -28,10 +28,11 @@ tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration2.ts(
 tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration2.ts(39,4): error TS2345: Argument of type '[number, number, boolean, boolean]' is not assignable to parameter of type '[any, any, [[any]]]'.
   Types of property '2' are incompatible.
     Type 'boolean' is not assignable to type '[[any]]'.
-tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration2.ts(40,4): error TS2345: Argument of type '[number, number, [[string]]]' is not assignable to parameter of type '[any, any, [[number]]]'.
-  Type '[[string]]' is not assignable to type '[[number]]'.
-    Type '[string]' is not assignable to type '[number]'.
-      Type 'string' is not assignable to type 'number'.
+tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration2.ts(40,4): error TS2345: Argument of type '[number, number, [[string]]]' is not assignable to parameter of type '[any, any, [[number?]]]'.
+  Type '[[string]]' is not assignable to type '[[number?]]'.
+    Type '[string]' is not assignable to type '[number?]'.
+      Types of property '0' are incompatible.
+        Type 'string' is not assignable to type 'number'.
 tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration2.ts(46,13): error TS2463: A binding pattern parameter cannot be optional in an implementation signature.
 tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration2.ts(47,13): error TS2463: A binding pattern parameter cannot be optional in an implementation signature.
 tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration2.ts(56,8): error TS2463: A binding pattern parameter cannot be optional in an implementation signature.
@@ -131,10 +132,11 @@ tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration2.ts(
 !!! error TS2345:     Type 'boolean' is not assignable to type '[[any]]'.
     c6([1, 2, [["string"]]]);  // Error, implied type is [any, any, [[number]]]  // Use initializer
        ~~~~~~~~~~~~~~~~~~~~
-!!! error TS2345: Argument of type '[number, number, [[string]]]' is not assignable to parameter of type '[any, any, [[number]]]'.
-!!! error TS2345:   Type '[[string]]' is not assignable to type '[[number]]'.
-!!! error TS2345:     Type '[string]' is not assignable to type '[number]'.
-!!! error TS2345:       Type 'string' is not assignable to type 'number'.
+!!! error TS2345: Argument of type '[number, number, [[string]]]' is not assignable to parameter of type '[any, any, [[number?]]]'.
+!!! error TS2345:   Type '[[string]]' is not assignable to type '[[number?]]'.
+!!! error TS2345:     Type '[string]' is not assignable to type '[number?]'.
+!!! error TS2345:       Types of property '0' are incompatible.
+!!! error TS2345:         Type 'string' is not assignable to type 'number'.
     
     // A parameter can be marked optional by following its name or binding pattern with a question mark (?)
     // or by including an initializer.  Initializers (including binding property or element initializers) are
diff --git a/tests/baselines/reference/destructuringParameterDeclaration2.types b/tests/baselines/reference/destructuringParameterDeclaration2.types
index 5810f5bca98cd..44f7690ee1f5e 100644
--- a/tests/baselines/reference/destructuringParameterDeclaration2.types
+++ b/tests/baselines/reference/destructuringParameterDeclaration2.types
@@ -143,7 +143,7 @@ function c5([a, b, [[c]]]) { }
 >c : any
 
 function c6([a, b, [[c = 1]]]) { }
->c6 : ([a, b, [[c]]]: [any, any, [[number]]]) => void
+>c6 : ([a, b, [[c]]]: [any, any, [[number?]]]) => void
 >a : any
 >b : any
 >c : number
@@ -193,7 +193,7 @@ c5([1, 2, false, true]);   // Error, implied type is [any, any, [[any]]]
 
 c6([1, 2, [["string"]]]);  // Error, implied type is [any, any, [[number]]]  // Use initializer
 >c6([1, 2, [["string"]]]) : void
->c6 : ([a, b, [[c]]]: [any, any, [[number]]]) => void
+>c6 : ([a, b, [[c]]]: [any, any, [[number?]]]) => void
 >[1, 2, [["string"]]] : (number | string[][])[]
 >1 : 1
 >2 : 2
diff --git a/tests/baselines/reference/destructuringParameterDeclaration3ES5.errors.txt b/tests/baselines/reference/destructuringParameterDeclaration3ES5.errors.txt
index 3b16993a047a5..d3d7cc97b519b 100644
--- a/tests/baselines/reference/destructuringParameterDeclaration3ES5.errors.txt
+++ b/tests/baselines/reference/destructuringParameterDeclaration3ES5.errors.txt
@@ -1,9 +1,14 @@
 tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration3ES5.ts(26,4): error TS2345: Argument of type '[number, number, [[string]], boolean, boolean]' is not assignable to parameter of type '[any, any, [[any]]]'.
   Types of property 'length' are incompatible.
     Type '5' is not assignable to type '3'.
+tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration3ES5.ts(29,5): error TS2345: Argument of type '[number, number, number, boolean, boolean]' is not assignable to parameter of type '[any, any, [[any]], ...any[]]'.
+  Types of property '2' are incompatible.
+    Type 'number' is not assignable to type '[[any]]'.
+tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration3ES5.ts(30,5): error TS2345: Argument of type '[number, number]' is not assignable to parameter of type '[any, any, [[any]], ...any[]]'.
+  Property '2' is missing in type '[number, number]'.
 
 
-==== tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration3ES5.ts (1 errors) ====
+==== tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration3ES5.ts (3 errors) ====
     // If the parameter is a rest parameter, the parameter type is any[]
     // A type annotation for a rest parameter must denote an array type.
     
@@ -37,7 +42,14 @@ tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration3ES5.
     
     a10([1, 2, [["string"]], false, true]);   // Parameter type is any[]
     a10([1, 2, 3, false, true]);              // Parameter type is any[]
+        ~~~~~~~~~~~~~~~~~~~~~~
+!!! error TS2345: Argument of type '[number, number, number, boolean, boolean]' is not assignable to parameter of type '[any, any, [[any]], ...any[]]'.
+!!! error TS2345:   Types of property '2' are incompatible.
+!!! error TS2345:     Type 'number' is not assignable to type '[[any]]'.
     a10([1, 2]);                              // Parameter type is any[]
+        ~~~~~~
+!!! error TS2345: Argument of type '[number, number]' is not assignable to parameter of type '[any, any, [[any]], ...any[]]'.
+!!! error TS2345:   Property '2' is missing in type '[number, number]'.
     a11([1, 2]);                              // Parameter type is number[]
     
     // Rest parameter with generic
diff --git a/tests/baselines/reference/destructuringParameterDeclaration3ES5.types b/tests/baselines/reference/destructuringParameterDeclaration3ES5.types
index 33e0d3b6bd868..e9d2abd14b6d2 100644
--- a/tests/baselines/reference/destructuringParameterDeclaration3ES5.types
+++ b/tests/baselines/reference/destructuringParameterDeclaration3ES5.types
@@ -52,7 +52,7 @@ function a9([a, b, [[c]]]) { }
 >c : any
 
 function a10([a, b, [[c]], ...x]) { }
->a10 : ([a, b, [[c]], ...x]: Iterable<any>) => void
+>a10 : ([a, b, [[c]], ...x]: [any, any, [[any]], ...any[]]) => void
 >a : any
 >b : any
 >c : any
@@ -107,19 +107,19 @@ a9([1, 2, [["string"]], false, true]);   // Parameter type is [any, any, [[any]]
 
 a10([1, 2, [["string"]], false, true]);   // Parameter type is any[]
 >a10([1, 2, [["string"]], false, true]) : void
->a10 : ([a, b, [[c]], ...x]: Iterable<any>) => void
->[1, 2, [["string"]], false, true] : (number | boolean | string[][])[]
+>a10 : ([a, b, [[c]], ...x]: [any, any, [[any]], ...any[]]) => void
+>[1, 2, [["string"]], false, true] : [number, number, [[string]], boolean, boolean]
 >1 : 1
 >2 : 2
->[["string"]] : string[][]
->["string"] : string[]
+>[["string"]] : [[string]]
+>["string"] : [string]
 >"string" : "string"
 >false : false
 >true : true
 
 a10([1, 2, 3, false, true]);              // Parameter type is any[]
 >a10([1, 2, 3, false, true]) : void
->a10 : ([a, b, [[c]], ...x]: Iterable<any>) => void
+>a10 : ([a, b, [[c]], ...x]: [any, any, [[any]], ...any[]]) => void
 >[1, 2, 3, false, true] : (number | boolean)[]
 >1 : 1
 >2 : 2
@@ -129,7 +129,7 @@ a10([1, 2, 3, false, true]);              // Parameter type is any[]
 
 a10([1, 2]);                              // Parameter type is any[]
 >a10([1, 2]) : void
->a10 : ([a, b, [[c]], ...x]: Iterable<any>) => void
+>a10 : ([a, b, [[c]], ...x]: [any, any, [[any]], ...any[]]) => void
 >[1, 2] : number[]
 >1 : 1
 >2 : 2
diff --git a/tests/baselines/reference/destructuringParameterDeclaration3ES5iterable.errors.txt b/tests/baselines/reference/destructuringParameterDeclaration3ES5iterable.errors.txt
index f0dbf325ed4c0..fa08518279e67 100644
--- a/tests/baselines/reference/destructuringParameterDeclaration3ES5iterable.errors.txt
+++ b/tests/baselines/reference/destructuringParameterDeclaration3ES5iterable.errors.txt
@@ -1,9 +1,14 @@
 tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration3ES5iterable.ts(26,4): error TS2345: Argument of type '[number, number, [[string]], boolean, boolean]' is not assignable to parameter of type '[any, any, [[any]]]'.
   Types of property 'length' are incompatible.
     Type '5' is not assignable to type '3'.
+tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration3ES5iterable.ts(29,5): error TS2345: Argument of type '[number, number, number, boolean, boolean]' is not assignable to parameter of type '[any, any, [[any]], ...any[]]'.
+  Types of property '2' are incompatible.
+    Type 'number' is not assignable to type '[[any]]'.
+tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration3ES5iterable.ts(30,5): error TS2345: Argument of type '[number, number]' is not assignable to parameter of type '[any, any, [[any]], ...any[]]'.
+  Property '2' is missing in type '[number, number]'.
 
 
-==== tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration3ES5iterable.ts (1 errors) ====
+==== tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration3ES5iterable.ts (3 errors) ====
     // If the parameter is a rest parameter, the parameter type is any[]
     // A type annotation for a rest parameter must denote an array type.
     
@@ -37,7 +42,14 @@ tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration3ES5i
     
     a10([1, 2, [["string"]], false, true]);   // Parameter type is any[]
     a10([1, 2, 3, false, true]);              // Parameter type is any[]
+        ~~~~~~~~~~~~~~~~~~~~~~
+!!! error TS2345: Argument of type '[number, number, number, boolean, boolean]' is not assignable to parameter of type '[any, any, [[any]], ...any[]]'.
+!!! error TS2345:   Types of property '2' are incompatible.
+!!! error TS2345:     Type 'number' is not assignable to type '[[any]]'.
     a10([1, 2]);                              // Parameter type is any[]
+        ~~~~~~
+!!! error TS2345: Argument of type '[number, number]' is not assignable to parameter of type '[any, any, [[any]], ...any[]]'.
+!!! error TS2345:   Property '2' is missing in type '[number, number]'.
     a11([1, 2]);                              // Parameter type is number[]
     
     // Rest parameter with generic
diff --git a/tests/baselines/reference/destructuringParameterDeclaration3ES5iterable.types b/tests/baselines/reference/destructuringParameterDeclaration3ES5iterable.types
index 931e149ffe2b4..7f26813108db9 100644
--- a/tests/baselines/reference/destructuringParameterDeclaration3ES5iterable.types
+++ b/tests/baselines/reference/destructuringParameterDeclaration3ES5iterable.types
@@ -52,7 +52,7 @@ function a9([a, b, [[c]]]) { }
 >c : any
 
 function a10([a, b, [[c]], ...x]) { }
->a10 : ([a, b, [[c]], ...x]: any[]) => void
+>a10 : ([a, b, [[c]], ...x]: [any, any, [[any]], ...any[]]) => void
 >a : any
 >b : any
 >c : any
@@ -107,19 +107,19 @@ a9([1, 2, [["string"]], false, true]);   // Parameter type is [any, any, [[any]]
 
 a10([1, 2, [["string"]], false, true]);   // Parameter type is any[]
 >a10([1, 2, [["string"]], false, true]) : void
->a10 : ([a, b, [[c]], ...x]: any[]) => void
->[1, 2, [["string"]], false, true] : (number | boolean | string[][])[]
+>a10 : ([a, b, [[c]], ...x]: [any, any, [[any]], ...any[]]) => void
+>[1, 2, [["string"]], false, true] : [number, number, [[string]], boolean, boolean]
 >1 : 1
 >2 : 2
->[["string"]] : string[][]
->["string"] : string[]
+>[["string"]] : [[string]]
+>["string"] : [string]
 >"string" : "string"
 >false : false
 >true : true
 
 a10([1, 2, 3, false, true]);              // Parameter type is any[]
 >a10([1, 2, 3, false, true]) : void
->a10 : ([a, b, [[c]], ...x]: any[]) => void
+>a10 : ([a, b, [[c]], ...x]: [any, any, [[any]], ...any[]]) => void
 >[1, 2, 3, false, true] : (number | boolean)[]
 >1 : 1
 >2 : 2
@@ -129,7 +129,7 @@ a10([1, 2, 3, false, true]);              // Parameter type is any[]
 
 a10([1, 2]);                              // Parameter type is any[]
 >a10([1, 2]) : void
->a10 : ([a, b, [[c]], ...x]: any[]) => void
+>a10 : ([a, b, [[c]], ...x]: [any, any, [[any]], ...any[]]) => void
 >[1, 2] : number[]
 >1 : 1
 >2 : 2
diff --git a/tests/baselines/reference/destructuringParameterDeclaration3ES6.errors.txt b/tests/baselines/reference/destructuringParameterDeclaration3ES6.errors.txt
index 67a5c1bf87fb4..238e155e954cd 100644
--- a/tests/baselines/reference/destructuringParameterDeclaration3ES6.errors.txt
+++ b/tests/baselines/reference/destructuringParameterDeclaration3ES6.errors.txt
@@ -1,9 +1,14 @@
 tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration3ES6.ts(26,4): error TS2345: Argument of type '[number, number, [[string]], boolean, boolean]' is not assignable to parameter of type '[any, any, [[any]]]'.
   Types of property 'length' are incompatible.
     Type '5' is not assignable to type '3'.
+tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration3ES6.ts(29,5): error TS2345: Argument of type '[number, number, number, boolean, boolean]' is not assignable to parameter of type '[any, any, [[any]], ...any[]]'.
+  Types of property '2' are incompatible.
+    Type 'number' is not assignable to type '[[any]]'.
+tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration3ES6.ts(30,5): error TS2345: Argument of type '[number, number]' is not assignable to parameter of type '[any, any, [[any]], ...any[]]'.
+  Property '2' is missing in type '[number, number]'.
 
 
-==== tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration3ES6.ts (1 errors) ====
+==== tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration3ES6.ts (3 errors) ====
     // If the parameter is a rest parameter, the parameter type is any[]
     // A type annotation for a rest parameter must denote an array type.
     
@@ -37,7 +42,14 @@ tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration3ES6.
     
     a10([1, 2, [["string"]], false, true]);   // Parameter type is any[]
     a10([1, 2, 3, false, true]);              // Parameter type is any[]
+        ~~~~~~~~~~~~~~~~~~~~~~
+!!! error TS2345: Argument of type '[number, number, number, boolean, boolean]' is not assignable to parameter of type '[any, any, [[any]], ...any[]]'.
+!!! error TS2345:   Types of property '2' are incompatible.
+!!! error TS2345:     Type 'number' is not assignable to type '[[any]]'.
     a10([1, 2]);                              // Parameter type is any[]
+        ~~~~~~
+!!! error TS2345: Argument of type '[number, number]' is not assignable to parameter of type '[any, any, [[any]], ...any[]]'.
+!!! error TS2345:   Property '2' is missing in type '[number, number]'.
     a11([1, 2]);                              // Parameter type is number[]
     
     // Rest parameter with generic
diff --git a/tests/baselines/reference/destructuringParameterDeclaration3ES6.types b/tests/baselines/reference/destructuringParameterDeclaration3ES6.types
index dc5e64d2c2cea..6dce00357b547 100644
--- a/tests/baselines/reference/destructuringParameterDeclaration3ES6.types
+++ b/tests/baselines/reference/destructuringParameterDeclaration3ES6.types
@@ -52,7 +52,7 @@ function a9([a, b, [[c]]]) { }
 >c : any
 
 function a10([a, b, [[c]], ...x]) { }
->a10 : ([a, b, [[c]], ...x]: Iterable<any>) => void
+>a10 : ([a, b, [[c]], ...x]: [any, any, [[any]], ...any[]]) => void
 >a : any
 >b : any
 >c : any
@@ -107,19 +107,19 @@ a9([1, 2, [["string"]], false, true]);   // Parameter type is [any, any, [[any]]
 
 a10([1, 2, [["string"]], false, true]);   // Parameter type is any[]
 >a10([1, 2, [["string"]], false, true]) : void
->a10 : ([a, b, [[c]], ...x]: Iterable<any>) => void
->[1, 2, [["string"]], false, true] : (number | boolean | string[][])[]
+>a10 : ([a, b, [[c]], ...x]: [any, any, [[any]], ...any[]]) => void
+>[1, 2, [["string"]], false, true] : [number, number, [[string]], boolean, boolean]
 >1 : 1
 >2 : 2
->[["string"]] : string[][]
->["string"] : string[]
+>[["string"]] : [[string]]
+>["string"] : [string]
 >"string" : "string"
 >false : false
 >true : true
 
 a10([1, 2, 3, false, true]);              // Parameter type is any[]
 >a10([1, 2, 3, false, true]) : void
->a10 : ([a, b, [[c]], ...x]: Iterable<any>) => void
+>a10 : ([a, b, [[c]], ...x]: [any, any, [[any]], ...any[]]) => void
 >[1, 2, 3, false, true] : (number | boolean)[]
 >1 : 1
 >2 : 2
@@ -129,7 +129,7 @@ a10([1, 2, 3, false, true]);              // Parameter type is any[]
 
 a10([1, 2]);                              // Parameter type is any[]
 >a10([1, 2]) : void
->a10 : ([a, b, [[c]], ...x]: Iterable<any>) => void
+>a10 : ([a, b, [[c]], ...x]: [any, any, [[any]], ...any[]]) => void
 >[1, 2] : number[]
 >1 : 1
 >2 : 2
diff --git a/tests/baselines/reference/destructuringVariableDeclaration1ES5.types b/tests/baselines/reference/destructuringVariableDeclaration1ES5.types
index c3fbcb22d5d46..58427ebd849aa 100644
--- a/tests/baselines/reference/destructuringVariableDeclaration1ES5.types
+++ b/tests/baselines/reference/destructuringVariableDeclaration1ES5.types
@@ -113,9 +113,9 @@ var temp1 = [true, false, true]
 >true : true
 
 var [d3, d4] = [1, "string", ...temp1];
->d3 : string | number | boolean
->d4 : string | number | boolean
->[1, "string", ...temp1] : (string | number | boolean)[]
+>d3 : number
+>d4 : string
+>[1, "string", ...temp1] : [number, string, ...boolean[]]
 >1 : 1
 >"string" : "string"
 >...temp1 : boolean
@@ -151,9 +151,9 @@ var {f: [f1, f2, { f3: f4, f5 }, , ]} = { f: [1, 2, { f3: 4, f5: 0 }] };
 >f4 : number
 >f5 : number
 > : undefined
->{ f: [1, 2, { f3: 4, f5: 0 }] } : { f: [number, number, { f3: number; f5: number; }, undefined]; }
->f : [number, number, { f3: number; f5: number; }, undefined]
->[1, 2, { f3: 4, f5: 0 }] : [number, number, { f3: number; f5: number; }, undefined]
+>{ f: [1, 2, { f3: 4, f5: 0 }] } : { f: [number, number, { f3: number; f5: number; }, undefined?]; }
+>f : [number, number, { f3: number; f5: number; }, undefined?]
+>[1, 2, { f3: 4, f5: 0 }] : [number, number, { f3: number; f5: number; }, undefined?]
 >1 : 1
 >2 : 2
 >{ f3: 4, f5: 0 } : { f3: number; f5: number; }
diff --git a/tests/baselines/reference/destructuringVariableDeclaration1ES5iterable.types b/tests/baselines/reference/destructuringVariableDeclaration1ES5iterable.types
index d52e7a51da87f..f8d01563d50b6 100644
--- a/tests/baselines/reference/destructuringVariableDeclaration1ES5iterable.types
+++ b/tests/baselines/reference/destructuringVariableDeclaration1ES5iterable.types
@@ -113,9 +113,9 @@ var temp1 = [true, false, true]
 >true : true
 
 var [d3, d4] = [1, "string", ...temp1];
->d3 : string | number | boolean
->d4 : string | number | boolean
->[1, "string", ...temp1] : (string | number | boolean)[]
+>d3 : number
+>d4 : string
+>[1, "string", ...temp1] : [number, string, ...boolean[]]
 >1 : 1
 >"string" : "string"
 >...temp1 : boolean
@@ -151,9 +151,9 @@ var {f: [f1, f2, { f3: f4, f5 }, , ]} = { f: [1, 2, { f3: 4, f5: 0 }] };
 >f4 : number
 >f5 : number
 > : undefined
->{ f: [1, 2, { f3: 4, f5: 0 }] } : { f: [number, number, { f3: number; f5: number; }, undefined]; }
->f : [number, number, { f3: number; f5: number; }, undefined]
->[1, 2, { f3: 4, f5: 0 }] : [number, number, { f3: number; f5: number; }, undefined]
+>{ f: [1, 2, { f3: 4, f5: 0 }] } : { f: [number, number, { f3: number; f5: number; }, undefined?]; }
+>f : [number, number, { f3: number; f5: number; }, undefined?]
+>[1, 2, { f3: 4, f5: 0 }] : [number, number, { f3: number; f5: number; }, undefined?]
 >1 : 1
 >2 : 2
 >{ f3: 4, f5: 0 } : { f3: number; f5: number; }
diff --git a/tests/baselines/reference/destructuringVariableDeclaration1ES6.types b/tests/baselines/reference/destructuringVariableDeclaration1ES6.types
index ce4dfe0679d9f..8b9566c3e1ce7 100644
--- a/tests/baselines/reference/destructuringVariableDeclaration1ES6.types
+++ b/tests/baselines/reference/destructuringVariableDeclaration1ES6.types
@@ -113,9 +113,9 @@ var temp1 = [true, false, true]
 >true : true
 
 var [d3, d4] = [1, "string", ...temp1];
->d3 : string | number | boolean
->d4 : string | number | boolean
->[1, "string", ...temp1] : (string | number | boolean)[]
+>d3 : number
+>d4 : string
+>[1, "string", ...temp1] : [number, string, ...boolean[]]
 >1 : 1
 >"string" : "string"
 >...temp1 : boolean
@@ -151,9 +151,9 @@ var {f: [f1, f2, { f3: f4, f5 }, , ]} = { f: [1, 2, { f3: 4, f5: 0 }] };
 >f4 : number
 >f5 : number
 > : undefined
->{ f: [1, 2, { f3: 4, f5: 0 }] } : { f: [number, number, { f3: number; f5: number; }, undefined]; }
->f : [number, number, { f3: number; f5: number; }, undefined]
->[1, 2, { f3: 4, f5: 0 }] : [number, number, { f3: number; f5: number; }, undefined]
+>{ f: [1, 2, { f3: 4, f5: 0 }] } : { f: [number, number, { f3: number; f5: number; }, undefined?]; }
+>f : [number, number, { f3: number; f5: number; }, undefined?]
+>[1, 2, { f3: 4, f5: 0 }] : [number, number, { f3: number; f5: number; }, undefined?]
 >1 : 1
 >2 : 2
 >{ f3: 4, f5: 0 } : { f3: number; f5: number; }
diff --git a/tests/baselines/reference/destructuringVariableDeclaration2.errors.txt b/tests/baselines/reference/destructuringVariableDeclaration2.errors.txt
index c831b10a467fb..fe8255ca55652 100644
--- a/tests/baselines/reference/destructuringVariableDeclaration2.errors.txt
+++ b/tests/baselines/reference/destructuringVariableDeclaration2.errors.txt
@@ -5,11 +5,9 @@ tests/cases/conformance/es6/destructuring/destructuringVariableDeclaration2.ts(4
   Type '[[boolean]]' is not assignable to type '[[string]]'.
     Type '[boolean]' is not assignable to type '[string]'.
       Type 'boolean' is not assignable to type 'string'.
-tests/cases/conformance/es6/destructuring/destructuringVariableDeclaration2.ts(14,16): error TS2459: Type 'number | { c3: number; c5: number; }' has no property 'c3' and no string index signature.
-tests/cases/conformance/es6/destructuring/destructuringVariableDeclaration2.ts(14,24): error TS2459: Type 'number | { c3: number; c5: number; }' has no property 'c5' and no string index signature.
 
 
-==== tests/cases/conformance/es6/destructuring/destructuringVariableDeclaration2.ts (4 errors) ====
+==== tests/cases/conformance/es6/destructuring/destructuringVariableDeclaration2.ts (2 errors) ====
     // The type T associated with a destructuring variable declaration is determined as follows:
     //      If the declaration includes a type annotation, T is that type.
     var {a1, a2}: { a1: number, a2: string } = { a1: true, a2: 1 }               // Error
@@ -33,10 +31,6 @@ tests/cases/conformance/es6/destructuring/destructuringVariableDeclaration2.ts(1
     //      If the binding element is a rest element, T is an array type with
     //          an element type E, where E is the type of the numeric index signature of S.
     var [c1, c2, { c3: c4, c5 }, , ...c6] = [1, 2, { c3: 4, c5: 0 }];  // Error
-                   ~~
-!!! error TS2459: Type 'number | { c3: number; c5: number; }' has no property 'c3' and no string index signature.
-                           ~~
-!!! error TS2459: Type 'number | { c3: number; c5: number; }' has no property 'c5' and no string index signature.
     
     // When a destructuring variable declaration, binding property, or binding element specifies
     // an initializer expression, the type of the initializer expression is required to be assignable
diff --git a/tests/baselines/reference/destructuringVariableDeclaration2.symbols b/tests/baselines/reference/destructuringVariableDeclaration2.symbols
index 8f7c2bfe56a89..8581ab21740e0 100644
--- a/tests/baselines/reference/destructuringVariableDeclaration2.symbols
+++ b/tests/baselines/reference/destructuringVariableDeclaration2.symbols
@@ -35,6 +35,7 @@ var [b0 = 3, b1 = true, b2 = temp] = [3, false, { t1: false, t2: 5}];  // Error
 var [c1, c2, { c3: c4, c5 }, , ...c6] = [1, 2, { c3: 4, c5: 0 }];  // Error
 >c1 : Symbol(c1, Decl(destructuringVariableDeclaration2.ts, 13, 5))
 >c2 : Symbol(c2, Decl(destructuringVariableDeclaration2.ts, 13, 8))
+>c3 : Symbol(c3, Decl(destructuringVariableDeclaration2.ts, 13, 48))
 >c4 : Symbol(c4, Decl(destructuringVariableDeclaration2.ts, 13, 14))
 >c5 : Symbol(c5, Decl(destructuringVariableDeclaration2.ts, 13, 22))
 >c6 : Symbol(c6, Decl(destructuringVariableDeclaration2.ts, 13, 30))
diff --git a/tests/baselines/reference/destructuringVariableDeclaration2.types b/tests/baselines/reference/destructuringVariableDeclaration2.types
index 666967f91bbf6..8af7ddb7628a4 100644
--- a/tests/baselines/reference/destructuringVariableDeclaration2.types
+++ b/tests/baselines/reference/destructuringVariableDeclaration2.types
@@ -53,14 +53,14 @@ var [b0 = 3, b1 = true, b2 = temp] = [3, false, { t1: false, t2: 5}];  // Error
 //      If the binding element is a rest element, T is an array type with
 //          an element type E, where E is the type of the numeric index signature of S.
 var [c1, c2, { c3: c4, c5 }, , ...c6] = [1, 2, { c3: 4, c5: 0 }];  // Error
->c1 : number | { c3: number; c5: number; }
->c2 : number | { c3: number; c5: number; }
+>c1 : number
+>c2 : number
 >c3 : any
->c4 : any
->c5 : any
+>c4 : number
+>c5 : number
 > : undefined
->c6 : (number | { c3: number; c5: number; })[]
->[1, 2, { c3: 4, c5: 0 }] : (number | { c3: number; c5: number; })[]
+>c6 : any[]
+>[1, 2, { c3: 4, c5: 0 }] : [number, number, { c3: number; c5: number; }, undefined?]
 >1 : 1
 >2 : 2
 >{ c3: 4, c5: 0 } : { c3: number; c5: number; }
diff --git a/tests/baselines/reference/destructuringWithLiteralInitializers.types b/tests/baselines/reference/destructuringWithLiteralInitializers.types
index 51c432f7605b7..f19c1cf2b7ead 100644
--- a/tests/baselines/reference/destructuringWithLiteralInitializers.types
+++ b/tests/baselines/reference/destructuringWithLiteralInitializers.types
@@ -235,7 +235,7 @@ g1([1, 1]);
 
 // (arg: [number, number]) => void
 function g2([x = 0, y = 0]) { }
->g2 : ([x, y]: [number, number]) => void
+>g2 : ([x, y]: [number?, number?]) => void
 >x : number
 >0 : 0
 >y : number
@@ -243,7 +243,7 @@ function g2([x = 0, y = 0]) { }
 
 g2([1, 1]);
 >g2([1, 1]) : void
->g2 : ([x, y]: [number, number]) => void
+>g2 : ([x, y]: [number?, number?]) => void
 >[1, 1] : [number, number]
 >1 : 1
 >1 : 1
@@ -270,40 +270,40 @@ g3([1, 1]);
 
 // (arg?: [number, number]) => void
 function g4([x, y = 0] = [0]) { }
->g4 : ([x, y]?: [number, number]) => void
+>g4 : ([x, y]?: [number, number?]) => void
 >x : number
 >y : number
 >0 : 0
->[0] : [number, number]
+>[0] : [number, number?]
 >0 : 0
 
 g4();
 >g4() : void
->g4 : ([x, y]?: [number, number]) => void
+>g4 : ([x, y]?: [number, number?]) => void
 
 g4([1, 1]);
 >g4([1, 1]) : void
->g4 : ([x, y]?: [number, number]) => void
+>g4 : ([x, y]?: [number, number?]) => void
 >[1, 1] : [number, number]
 >1 : 1
 >1 : 1
 
 // (arg?: [number, number]) => void
 function g5([x = 0, y = 0] = []) { }
->g5 : ([x, y]?: [number, number]) => void
+>g5 : ([x, y]?: [number?, number?]) => void
 >x : number
 >0 : 0
 >y : number
 >0 : 0
->[] : [number, number]
+>[] : [number?, number?]
 
 g5();
 >g5() : void
->g5 : ([x, y]?: [number, number]) => void
+>g5 : ([x, y]?: [number?, number?]) => void
 
 g5([1, 1]);
 >g5([1, 1]) : void
->g5 : ([x, y]?: [number, number]) => void
+>g5 : ([x, y]?: [number?, number?]) => void
 >[1, 1] : [number, number]
 >1 : 1
 >1 : 1
diff --git a/tests/baselines/reference/downlevelLetConst12.types b/tests/baselines/reference/downlevelLetConst12.types
index 725e446e010db..25316e67eb468 100644
--- a/tests/baselines/reference/downlevelLetConst12.types
+++ b/tests/baselines/reference/downlevelLetConst12.types
@@ -12,7 +12,7 @@ const bar = 1;
 
 let [baz] = [];
 >baz : any
->[] : [undefined]
+>[] : [undefined?]
 
 let {a: baz2} = { a: 1 };
 >a : any
@@ -23,7 +23,7 @@ let {a: baz2} = { a: 1 };
 
 const [baz3] = []
 >baz3 : any
->[] : [undefined]
+>[] : [undefined?]
 
 const {a: baz4} = { a: 1 };
 >a : any
diff --git a/tests/baselines/reference/downlevelLetConst16.types b/tests/baselines/reference/downlevelLetConst16.types
index 5655b1f8f15d3..450773fd9bb31 100644
--- a/tests/baselines/reference/downlevelLetConst16.types
+++ b/tests/baselines/reference/downlevelLetConst16.types
@@ -516,7 +516,7 @@ function foo3() {
     }
     for (let [y] = []; ;) {
 >y : any
->[] : [undefined]
+>[] : [undefined?]
 
         use(y);
 >use(y) : any
@@ -555,7 +555,7 @@ function foo4() {
     }
     for (const [y] = []; ;) {
 >y : any
->[] : [undefined]
+>[] : [undefined?]
 
         use(y);
 >use(y) : any
diff --git a/tests/baselines/reference/duplicateIdentifierBindingElementInParameterDeclaration1.types b/tests/baselines/reference/duplicateIdentifierBindingElementInParameterDeclaration1.types
index aa715daa30ec0..f21501bf48103 100644
--- a/tests/baselines/reference/duplicateIdentifierBindingElementInParameterDeclaration1.types
+++ b/tests/baselines/reference/duplicateIdentifierBindingElementInParameterDeclaration1.types
@@ -40,7 +40,7 @@ function f5({e, e: {e}}, {e}, [d,e, [[e]]], ...e) { }
 >e : any[]
 
 function f6([f, ...f]) { }
->f6 : ([f, ...f]: any[]) => void
+>f6 : ([f, ...f]: [any, ...any[]]) => void
 >f : any
 >f : any[]
 
diff --git a/tests/baselines/reference/duplicateIdentifierBindingElementInParameterDeclaration2.types b/tests/baselines/reference/duplicateIdentifierBindingElementInParameterDeclaration2.types
index 1ef1232e1ba50..715d0acc02014 100644
--- a/tests/baselines/reference/duplicateIdentifierBindingElementInParameterDeclaration2.types
+++ b/tests/baselines/reference/duplicateIdentifierBindingElementInParameterDeclaration2.types
@@ -43,7 +43,7 @@ function f5({e, e: {e}}, {e}, [d, e, [[e]]], ...e) { }
 >e : any[]
 
 function f6([f, ...f]) { }
->f6 : ([f, ...f]: any[]) => void
+>f6 : ([f, ...f]: [any, ...any[]]) => void
 >f : any
 >f : any[]
 
diff --git a/tests/baselines/reference/emitArrowFunctionES6.types b/tests/baselines/reference/emitArrowFunctionES6.types
index 314d5e464b780..db88d3860dae4 100644
--- a/tests/baselines/reference/emitArrowFunctionES6.types
+++ b/tests/baselines/reference/emitArrowFunctionES6.types
@@ -58,14 +58,14 @@ var p3 = ([, a]) => { };
 >a : any
 
 var p4 = ([, ...a]) => { };
->p4 : ([, ...a]: Iterable<any>) => void
->([, ...a]) => { } : ([, ...a]: Iterable<any>) => void
+>p4 : ([, ...a]: [any?, ...any[]]) => void
+>([, ...a]) => { } : ([, ...a]: [any?, ...any[]]) => void
 > : undefined
 >a : any[]
 
 var p5 = ([a = 1]) => { };
->p5 : ([a]: [number]) => void
->([a = 1]) => { } : ([a]: [number]) => void
+>p5 : ([a]: [number?]) => void
+>([a = 1]) => { } : ([a]: [number?]) => void
 >a : number
 >1 : 1
 
diff --git a/tests/baselines/reference/for-of49.types b/tests/baselines/reference/for-of49.types
index bed54d205ea36..fe46157c2864e 100644
--- a/tests/baselines/reference/for-of49.types
+++ b/tests/baselines/reference/for-of49.types
@@ -13,7 +13,7 @@ var map = new Map([["", true]]);
 >true : true
 
 for ([k, ...[v]] of map) {
->[k, ...[v]] : (string | boolean)[]
+>[k, ...[v]] : [string, ...boolean[]]
 >k : string
 >...[v] : boolean
 >[v] : [boolean]
diff --git a/tests/baselines/reference/initializedDestructuringAssignmentTypes.types b/tests/baselines/reference/initializedDestructuringAssignmentTypes.types
index 542c693c5258a..bb30a395cffa5 100644
--- a/tests/baselines/reference/initializedDestructuringAssignmentTypes.types
+++ b/tests/baselines/reference/initializedDestructuringAssignmentTypes.types
@@ -9,7 +9,7 @@ const [, a = ''] = ''.match('') || [];
 >'' : ""
 >match : (regexp: string | RegExp) => RegExpMatchArray
 >'' : ""
->[] : [undefined, ""]
+>[] : [undefined?, ""?]
 
 a.toFixed()
 >a.toFixed() : any
diff --git a/tests/baselines/reference/iterableArrayPattern13.errors.txt b/tests/baselines/reference/iterableArrayPattern13.errors.txt
new file mode 100644
index 0000000000000..54c064e9ffc94
--- /dev/null
+++ b/tests/baselines/reference/iterableArrayPattern13.errors.txt
@@ -0,0 +1,25 @@
+tests/cases/conformance/es6/destructuring/iterableArrayPattern13.ts(17,5): error TS2345: Argument of type 'FooIterator' is not assignable to parameter of type '[any, ...any[]]'.
+  Property '0' is missing in type 'FooIterator'.
+
+
+==== tests/cases/conformance/es6/destructuring/iterableArrayPattern13.ts (1 errors) ====
+    class Bar { x }
+    class Foo extends Bar { y }
+    class FooIterator {
+        next() {
+            return {
+                value: new Foo,
+                done: false
+            };
+        }
+    
+        [Symbol.iterator]() {
+            return this;
+        }
+    }
+    
+    function fun([a, ...b]) { }
+    fun(new FooIterator);
+        ~~~~~~~~~~~~~~~
+!!! error TS2345: Argument of type 'FooIterator' is not assignable to parameter of type '[any, ...any[]]'.
+!!! error TS2345:   Property '0' is missing in type 'FooIterator'.
\ No newline at end of file
diff --git a/tests/baselines/reference/iterableArrayPattern13.types b/tests/baselines/reference/iterableArrayPattern13.types
index b97e955137208..d73f5cf0ab8de 100644
--- a/tests/baselines/reference/iterableArrayPattern13.types
+++ b/tests/baselines/reference/iterableArrayPattern13.types
@@ -41,13 +41,13 @@ class FooIterator {
 }
 
 function fun([a, ...b]) { }
->fun : ([a, ...b]: Iterable<any>) => void
+>fun : ([a, ...b]: [any, ...any[]]) => void
 >a : any
 >b : any[]
 
 fun(new FooIterator);
 >fun(new FooIterator) : void
->fun : ([a, ...b]: Iterable<any>) => void
+>fun : ([a, ...b]: [any, ...any[]]) => void
 >new FooIterator : FooIterator
 >FooIterator : typeof FooIterator
 
diff --git a/tests/baselines/reference/iterableArrayPattern24.types b/tests/baselines/reference/iterableArrayPattern24.types
index ebcc055836e33..5a792a2f8516c 100644
--- a/tests/baselines/reference/iterableArrayPattern24.types
+++ b/tests/baselines/reference/iterableArrayPattern24.types
@@ -5,7 +5,7 @@ var a: string, b: boolean[];
 
 [a, ...b] = { 0: "", 1: true };
 >[a, ...b] = { 0: "", 1: true } : { 0: string; 1: true; }
->[a, ...b] : (string | boolean)[]
+>[a, ...b] : [string, ...boolean[]]
 >a : string
 >...b : boolean
 >b : boolean[]
diff --git a/tests/baselines/reference/iterableArrayPattern4.types b/tests/baselines/reference/iterableArrayPattern4.types
index 92d34c9a7dbbf..ece3b235dc437 100644
--- a/tests/baselines/reference/iterableArrayPattern4.types
+++ b/tests/baselines/reference/iterableArrayPattern4.types
@@ -48,7 +48,7 @@ var a: Bar, b: Bar[];
 
 [a, ...b] = new FooIterator
 >[a, ...b] = new FooIterator : FooIterator
->[a, ...b] : Bar[]
+>[a, ...b] : [Bar, ...Bar[]]
 >a : Bar
 >...b : Bar
 >b : Bar[]
diff --git a/tests/baselines/reference/iterableArrayPattern6.types b/tests/baselines/reference/iterableArrayPattern6.types
index 6e182385a81cd..c465c02ea4494 100644
--- a/tests/baselines/reference/iterableArrayPattern6.types
+++ b/tests/baselines/reference/iterableArrayPattern6.types
@@ -47,7 +47,7 @@ var a: Bar, b: string[];
 
 [a, ...b] = new FooIterator;
 >[a, ...b] = new FooIterator : FooIterator
->[a, ...b] : (string | Bar)[]
+>[a, ...b] : [Bar, ...string[]]
 >a : Bar
 >...b : string
 >b : string[]
diff --git a/tests/baselines/reference/iterableArrayPattern8.types b/tests/baselines/reference/iterableArrayPattern8.types
index 7d53628c82f34..7614b15b05494 100644
--- a/tests/baselines/reference/iterableArrayPattern8.types
+++ b/tests/baselines/reference/iterableArrayPattern8.types
@@ -47,7 +47,7 @@ var a: Bar, b: string;
 
 [a, ...b] = new FooIterator;
 >[a, ...b] = new FooIterator : FooIterator
->[a, ...b] : (string | Bar)[]
+>[a, ...b] : [Bar, ...string[]]
 >a : Bar
 >...b : string
 >b : string
diff --git a/tests/baselines/reference/noImplicitAnyDestructuringParameterDeclaration.types b/tests/baselines/reference/noImplicitAnyDestructuringParameterDeclaration.types
index 6b6149be67002..c0eef976c4dbc 100644
--- a/tests/baselines/reference/noImplicitAnyDestructuringParameterDeclaration.types
+++ b/tests/baselines/reference/noImplicitAnyDestructuringParameterDeclaration.types
@@ -7,7 +7,7 @@ function f1([a], {b}, c, d) { // error
 >d : any
 }
 function f2([a = undefined], {b = null}, c = undefined, d = null) { // error
->f2 : ([a]: [any], { b }: { b?: any; }, c?: any, d?: any) => void
+>f2 : ([a]: [any?], { b }: { b?: any; }, c?: any, d?: any) => void
 >a : any
 >undefined : undefined
 >b : any
diff --git a/tests/baselines/reference/noImplicitAnyDestructuringVarDeclaration.types b/tests/baselines/reference/noImplicitAnyDestructuringVarDeclaration.types
index 01355600ff3dc..823af52080699 100644
--- a/tests/baselines/reference/noImplicitAnyDestructuringVarDeclaration.types
+++ b/tests/baselines/reference/noImplicitAnyDestructuringVarDeclaration.types
@@ -44,5 +44,5 @@ var [a4] = [undefined], {b4} = { b4: null }, c4 = undefined, d4 = null; // error
 var [a5 = undefined] = []; // error
 >a5 : any
 >undefined : undefined
->[] : [undefined]
+>[] : [undefined?]
 
diff --git a/tests/baselines/reference/objectRestAssignment.types b/tests/baselines/reference/objectRestAssignment.types
index b51260736ade0..c0c84b6d5e349 100644
--- a/tests/baselines/reference/objectRestAssignment.types
+++ b/tests/baselines/reference/objectRestAssignment.types
@@ -59,9 +59,9 @@ var { a: [{ ...nested2 }, ...y], b: { z, ...c }, ...rest2 } = overEmit;
 ({ a: [{ ...nested2 }, ...y], b: { z, ...c }, ...rest2 } = overEmit);
 >({ a: [{ ...nested2 }, ...y], b: { z, ...c }, ...rest2 } = overEmit) : { a: { ka: string; x: string; }[]; b: { z: string; ki: string; ku: string; }; ke: string; ko: string; }
 >{ a: [{ ...nested2 }, ...y], b: { z, ...c }, ...rest2 } = overEmit : { a: { ka: string; x: string; }[]; b: { z: string; ki: string; ku: string; }; ke: string; ko: string; }
->{ a: [{ ...nested2 }, ...y], b: { z, ...c }, ...rest2 } : { ke: string; ko: string; a: { ka: string; x: string; }[]; b: { ki: string; ku: string; z: string; }; }
->a : { ka: string; x: string; }[]
->[{ ...nested2 }, ...y] : { ka: string; x: string; }[]
+>{ a: [{ ...nested2 }, ...y], b: { z, ...c }, ...rest2 } : { ke: string; ko: string; a: [{ ka: string; x: string; }, ...{ ka: string; x: string; }[]]; b: { ki: string; ku: string; z: string; }; }
+>a : [{ ka: string; x: string; }, ...{ ka: string; x: string; }[]]
+>[{ ...nested2 }, ...y] : [{ ka: string; x: string; }, ...{ ka: string; x: string; }[]]
 >{ ...nested2 } : { ka: string; x: string; }
 >nested2 : { ka: string; x: string; }
 >...y : { ka: string; x: string; }
diff --git a/tests/baselines/reference/recursiveLetConst.types b/tests/baselines/reference/recursiveLetConst.types
index 42db1d5df2464..7e4db6687aab1 100644
--- a/tests/baselines/reference/recursiveLetConst.types
+++ b/tests/baselines/reference/recursiveLetConst.types
@@ -49,7 +49,7 @@ for (let [v] of v) { }
 let [x2 = x2] = []
 >x2 : any
 >x2 : any
->[] : [any]
+>[] : [any?]
 
 let z0 = () => z0;
 >z0 : () => any
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringForArrayBindingPattern.types b/tests/baselines/reference/sourceMapValidationDestructuringForArrayBindingPattern.types
index 00ecd2659eead..618fc7c7805ab 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringForArrayBindingPattern.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringForArrayBindingPattern.types
@@ -429,7 +429,7 @@ for (let [nameMA, [primarySkillA, secondarySkillA]] = ["trimmer", ["trimming", "
 
 for (let [numberA3, ...robotAInfo] = robotA, i = 0; i < 1; i++) {
 >numberA3 : number
->robotAInfo : (string | number)[]
+>robotAInfo : string[]
 >robotA : [number, string, string]
 >i : number
 >0 : 0
@@ -448,7 +448,7 @@ for (let [numberA3, ...robotAInfo] = robotA, i = 0; i < 1; i++) {
 }
 for (let [numberA3, ...robotAInfo] = getRobot(), i = 0; i < 1; i++) {
 >numberA3 : number
->robotAInfo : (string | number)[]
+>robotAInfo : string[]
 >getRobot() : [number, string, string]
 >getRobot : () => [number, string, string]
 >i : number
@@ -467,9 +467,9 @@ for (let [numberA3, ...robotAInfo] = getRobot(), i = 0; i < 1; i++) {
 >numberA3 : number
 }
 for (let [numberA3, ...robotAInfo] = [2, "trimmer", "trimming"], i = 0; i < 1; i++) {
->numberA3 : string | number
->robotAInfo : (string | number)[]
->[2, "trimmer", "trimming"] : (string | number)[]
+>numberA3 : number
+>robotAInfo : string[]
+>[2, "trimmer", "trimming"] : [number, string, string]
 >2 : 2
 >"trimmer" : "trimmer"
 >"trimming" : "trimming"
@@ -486,7 +486,7 @@ for (let [numberA3, ...robotAInfo] = [2, "trimmer", "trimming"], i = 0; i < 1; i
 >console.log : (msg: any) => void
 >console : { log(msg: any): void; }
 >log : (msg: any) => void
->numberA3 : string | number
+>numberA3 : number
 }
 for (let [...multiRobotAInfo] = multiRobotA, i = 0; i < 1; i++) {
 >multiRobotAInfo : (string | [string, string])[]
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringForArrayBindingPattern2.types b/tests/baselines/reference/sourceMapValidationDestructuringForArrayBindingPattern2.types
index f317fa2a83cfd..802f21b64083d 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringForArrayBindingPattern2.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringForArrayBindingPattern2.types
@@ -531,7 +531,7 @@ for ([nameMA, [primarySkillA, secondarySkillA]] = ["trimmer", ["trimming", "edgi
 for ([numberA3, ...robotAInfo] = robotA, i = 0; i < 1; i++) {
 >[numberA3, ...robotAInfo] = robotA, i = 0 : 0
 >[numberA3, ...robotAInfo] = robotA : [number, string, string]
->[numberA3, ...robotAInfo] : (string | number)[]
+>[numberA3, ...robotAInfo] : [number, ...(string | number)[]]
 >numberA3 : number
 >...robotAInfo : string | number
 >robotAInfo : (string | number)[]
@@ -555,7 +555,7 @@ for ([numberA3, ...robotAInfo] = robotA, i = 0; i < 1; i++) {
 for ([numberA3, ...robotAInfo] = getRobot(), i = 0; i < 1; i++) {
 >[numberA3, ...robotAInfo] = getRobot(), i = 0 : 0
 >[numberA3, ...robotAInfo] = getRobot() : [number, string, string]
->[numberA3, ...robotAInfo] : (string | number)[]
+>[numberA3, ...robotAInfo] : [number, ...(string | number)[]]
 >numberA3 : number
 >...robotAInfo : string | number
 >robotAInfo : (string | number)[]
@@ -580,7 +580,7 @@ for ([numberA3, ...robotAInfo] = getRobot(), i = 0; i < 1; i++) {
 for ([numberA3, ...robotAInfo] = <Robot>[2, "trimmer", "trimming"], i = 0; i < 1; i++) {
 >[numberA3, ...robotAInfo] = <Robot>[2, "trimmer", "trimming"], i = 0 : 0
 >[numberA3, ...robotAInfo] = <Robot>[2, "trimmer", "trimming"] : [number, string, string]
->[numberA3, ...robotAInfo] : (string | number)[]
+>[numberA3, ...robotAInfo] : [number, ...(string | number)[]]
 >numberA3 : number
 >...robotAInfo : string | number
 >robotAInfo : (string | number)[]
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringForArrayBindingPatternDefaultValues.types b/tests/baselines/reference/sourceMapValidationDestructuringForArrayBindingPatternDefaultValues.types
index 443f22bbab813..45a063c27d44d 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringForArrayBindingPatternDefaultValues.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringForArrayBindingPatternDefaultValues.types
@@ -534,7 +534,7 @@ for (let [numberA3 = -1, ...robotAInfo] = robotA, i = 0; i < 1; i++) {
 >numberA3 : number
 >-1 : -1
 >1 : 1
->robotAInfo : (string | number)[]
+>robotAInfo : string[]
 >robotA : [number, string, string]
 >i : number
 >0 : 0
@@ -555,7 +555,7 @@ for (let [numberA3 = -1, ...robotAInfo] = getRobot(), i = 0; i < 1; i++) {
 >numberA3 : number
 >-1 : -1
 >1 : 1
->robotAInfo : (string | number)[]
+>robotAInfo : string[]
 >getRobot() : [number, string, string]
 >getRobot : () => [number, string, string]
 >i : number
@@ -574,11 +574,11 @@ for (let [numberA3 = -1, ...robotAInfo] = getRobot(), i = 0; i < 1; i++) {
 >numberA3 : number
 }
 for (let [numberA3 = -1, ...robotAInfo] = [2, "trimmer", "trimming"], i = 0; i < 1; i++) {
->numberA3 : string | number
+>numberA3 : number
 >-1 : -1
 >1 : 1
->robotAInfo : (string | number)[]
->[2, "trimmer", "trimming"] : (string | number)[]
+>robotAInfo : string[]
+>[2, "trimmer", "trimming"] : [number, string, string]
 >2 : 2
 >"trimmer" : "trimmer"
 >"trimming" : "trimming"
@@ -595,5 +595,5 @@ for (let [numberA3 = -1, ...robotAInfo] = [2, "trimmer", "trimming"], i = 0; i <
 >console.log : (msg: any) => void
 >console : { log(msg: any): void; }
 >log : (msg: any) => void
->numberA3 : string | number
+>numberA3 : number
 }
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringForArrayBindingPatternDefaultValues2.types b/tests/baselines/reference/sourceMapValidationDestructuringForArrayBindingPatternDefaultValues2.types
index 0795142c6778d..01ddecf52f9d5 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringForArrayBindingPatternDefaultValues2.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringForArrayBindingPatternDefaultValues2.types
@@ -666,7 +666,7 @@ for ([nameMA = "noName",
 for ([numberA3 = -1, ...robotAInfo] = robotA, i = 0; i < 1; i++) {
 >[numberA3 = -1, ...robotAInfo] = robotA, i = 0 : 0
 >[numberA3 = -1, ...robotAInfo] = robotA : [number, string, string]
->[numberA3 = -1, ...robotAInfo] : (string | number)[]
+>[numberA3 = -1, ...robotAInfo] : [number, ...(string | number)[]]
 >numberA3 = -1 : -1
 >numberA3 : number
 >-1 : -1
@@ -693,7 +693,7 @@ for ([numberA3 = -1, ...robotAInfo] = robotA, i = 0; i < 1; i++) {
 for ([numberA3 = -1, ...robotAInfo] = getRobot(), i = 0; i < 1; i++) {
 >[numberA3 = -1, ...robotAInfo] = getRobot(), i = 0 : 0
 >[numberA3 = -1, ...robotAInfo] = getRobot() : [number, string, string]
->[numberA3 = -1, ...robotAInfo] : (string | number)[]
+>[numberA3 = -1, ...robotAInfo] : [number, ...(string | number)[]]
 >numberA3 = -1 : -1
 >numberA3 : number
 >-1 : -1
@@ -721,7 +721,7 @@ for ([numberA3 = -1, ...robotAInfo] = getRobot(), i = 0; i < 1; i++) {
 for ([numberA3 = -1, ...robotAInfo] = <Robot>[2, "trimmer", "trimming"], i = 0; i < 1; i++) {
 >[numberA3 = -1, ...robotAInfo] = <Robot>[2, "trimmer", "trimming"], i = 0 : 0
 >[numberA3 = -1, ...robotAInfo] = <Robot>[2, "trimmer", "trimming"] : [number, string, string]
->[numberA3 = -1, ...robotAInfo] : (string | number)[]
+>[numberA3 = -1, ...robotAInfo] : [number, ...(string | number)[]]
 >numberA3 = -1 : -1
 >numberA3 : number
 >-1 : -1
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringForOfArrayBindingPattern.types b/tests/baselines/reference/sourceMapValidationDestructuringForOfArrayBindingPattern.types
index 41dc32d2648c6..cf4f7c990bc5d 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringForOfArrayBindingPattern.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringForOfArrayBindingPattern.types
@@ -314,7 +314,7 @@ for (let [nameMA, [primarySkillA, secondarySkillA]] of [multiRobotA, multiRobotB
 
 for (let [numberA3, ...robotAInfo] of robots) {
 >numberA3 : number
->robotAInfo : (string | number)[]
+>robotAInfo : string[]
 >robots : [number, string, string][]
 
     console.log(numberA3);
@@ -326,7 +326,7 @@ for (let [numberA3, ...robotAInfo] of robots) {
 }
 for (let [numberA3, ...robotAInfo] of getRobots()) {
 >numberA3 : number
->robotAInfo : (string | number)[]
+>robotAInfo : string[]
 >getRobots() : [number, string, string][]
 >getRobots : () => [number, string, string][]
 
@@ -339,7 +339,7 @@ for (let [numberA3, ...robotAInfo] of getRobots()) {
 }
 for (let [numberA3, ...robotAInfo] of [robotA, robotB]) {
 >numberA3 : number
->robotAInfo : (string | number)[]
+>robotAInfo : string[]
 >[robotA, robotB] : [number, string, string][]
 >robotA : [number, string, string]
 >robotB : [number, string, string]
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringForOfArrayBindingPattern2.types b/tests/baselines/reference/sourceMapValidationDestructuringForOfArrayBindingPattern2.types
index abc08ee63d425..9c308a058ae0b 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringForOfArrayBindingPattern2.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringForOfArrayBindingPattern2.types
@@ -357,7 +357,7 @@ for ([nameMA, [primarySkillA, secondarySkillA]] of [multiRobotA, multiRobotB]) {
 }
 
 for ([numberA3, ...robotAInfo] of robots) {
->[numberA3, ...robotAInfo] : (string | number)[]
+>[numberA3, ...robotAInfo] : [number, ...(string | number)[]]
 >numberA3 : number
 >...robotAInfo : string | number
 >robotAInfo : (string | number)[]
@@ -371,7 +371,7 @@ for ([numberA3, ...robotAInfo] of robots) {
 >numberA3 : number
 }
 for ([numberA3, ...robotAInfo] of getRobots()) {
->[numberA3, ...robotAInfo] : (string | number)[]
+>[numberA3, ...robotAInfo] : [number, ...(string | number)[]]
 >numberA3 : number
 >...robotAInfo : string | number
 >robotAInfo : (string | number)[]
@@ -386,7 +386,7 @@ for ([numberA3, ...robotAInfo] of getRobots()) {
 >numberA3 : number
 }
 for ([numberA3, ...robotAInfo] of [robotA, robotB]) {
->[numberA3, ...robotAInfo] : (string | number)[]
+>[numberA3, ...robotAInfo] : [number, ...(string | number)[]]
 >numberA3 : number
 >...robotAInfo : string | number
 >robotAInfo : (string | number)[]
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringForOfArrayBindingPatternDefaultValues.types b/tests/baselines/reference/sourceMapValidationDestructuringForOfArrayBindingPatternDefaultValues.types
index e82c981033e7d..168147545113c 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringForOfArrayBindingPatternDefaultValues.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringForOfArrayBindingPatternDefaultValues.types
@@ -409,7 +409,7 @@ for (let [numberA3 = -1, ...robotAInfo] of robots) {
 >numberA3 : number
 >-1 : -1
 >1 : 1
->robotAInfo : (string | number)[]
+>robotAInfo : string[]
 >robots : [number, string, string][]
 
     console.log(numberA3);
@@ -423,7 +423,7 @@ for (let [numberA3 = -1, ...robotAInfo] of getRobots()) {
 >numberA3 : number
 >-1 : -1
 >1 : 1
->robotAInfo : (string | number)[]
+>robotAInfo : string[]
 >getRobots() : [number, string, string][]
 >getRobots : () => [number, string, string][]
 
@@ -438,7 +438,7 @@ for (let [numberA3 = -1, ...robotAInfo] of [robotA, robotB]) {
 >numberA3 : number
 >-1 : -1
 >1 : 1
->robotAInfo : (string | number)[]
+>robotAInfo : string[]
 >[robotA, robotB] : [number, string, string][]
 >robotA : [number, string, string]
 >robotB : [number, string, string]
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringForOfArrayBindingPatternDefaultValues2.types b/tests/baselines/reference/sourceMapValidationDestructuringForOfArrayBindingPatternDefaultValues2.types
index dad997dac4fe5..ed262d6a3d8e9 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringForOfArrayBindingPatternDefaultValues2.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringForOfArrayBindingPatternDefaultValues2.types
@@ -489,7 +489,7 @@ for ([nameMA = "noName", [
 }
 
 for ([numberA3 = -1, ...robotAInfo] of robots) {
->[numberA3 = -1, ...robotAInfo] : (string | number)[]
+>[numberA3 = -1, ...robotAInfo] : [number, ...(string | number)[]]
 >numberA3 = -1 : -1
 >numberA3 : number
 >-1 : -1
@@ -506,7 +506,7 @@ for ([numberA3 = -1, ...robotAInfo] of robots) {
 >numberA3 : number
 }
 for ([numberA3 = -1, ...robotAInfo] of getRobots()) {
->[numberA3 = -1, ...robotAInfo] : (string | number)[]
+>[numberA3 = -1, ...robotAInfo] : [number, ...(string | number)[]]
 >numberA3 = -1 : -1
 >numberA3 : number
 >-1 : -1
@@ -524,7 +524,7 @@ for ([numberA3 = -1, ...robotAInfo] of getRobots()) {
 >numberA3 : number
 }
 for ([numberA3 = -1, ...robotAInfo] of [robotA, robotB]) {
->[numberA3 = -1, ...robotAInfo] : (string | number)[]
+>[numberA3 = -1, ...robotAInfo] : [number, ...(string | number)[]]
 >numberA3 = -1 : -1
 >numberA3 : number
 >-1 : -1
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringParametertArrayBindingPattern.types b/tests/baselines/reference/sourceMapValidationDestructuringParametertArrayBindingPattern.types
index d7aed64a23282..eb9a5dce264d8 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringParametertArrayBindingPattern.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringParametertArrayBindingPattern.types
@@ -62,7 +62,7 @@ function foo3([numberA2, nameA2, skillA2]: Robot) {
 function foo4([numberA3, ...robotAInfo]: Robot) {
 >foo4 : ([numberA3, ...robotAInfo]: [number, string, string]) => void
 >numberA3 : number
->robotAInfo : (string | number)[]
+>robotAInfo : string[]
 >Robot : [number, string, string]
 
     console.log(robotAInfo);
@@ -70,7 +70,7 @@ function foo4([numberA3, ...robotAInfo]: Robot) {
 >console.log : (msg: any) => void
 >console : { log(msg: any): void; }
 >log : (msg: any) => void
->robotAInfo : (string | number)[]
+>robotAInfo : string[]
 }
 
 foo1(robotA);
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringParametertArrayBindingPatternDefaultValues.types b/tests/baselines/reference/sourceMapValidationDestructuringParametertArrayBindingPatternDefaultValues.types
index a9d1013c136cf..ef4ee4f81bb37 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringParametertArrayBindingPatternDefaultValues.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringParametertArrayBindingPatternDefaultValues.types
@@ -86,7 +86,7 @@ function foo4([numberA3 = -1, ...robotAInfo]: Robot = [-1, "name", "skill"]) {
 >numberA3 : number
 >-1 : -1
 >1 : 1
->robotAInfo : (string | number)[]
+>robotAInfo : string[]
 >Robot : [number, string, string]
 >[-1, "name", "skill"] : [number, string, string]
 >-1 : -1
@@ -99,7 +99,7 @@ function foo4([numberA3 = -1, ...robotAInfo]: Robot = [-1, "name", "skill"]) {
 >console.log : (msg: any) => void
 >console : { log(msg: any): void; }
 >log : (msg: any) => void
->robotAInfo : (string | number)[]
+>robotAInfo : string[]
 }
 
 foo1(robotA);
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPattern.types b/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPattern.types
index 46bdfec4b06b2..f240f7fd40b3f 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPattern.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPattern.types
@@ -59,7 +59,7 @@ let [numberC, nameC, skillC] = [3, "edging", "Trimming edges"];
 
 let [numberA3, ...robotAInfo] = robotA;
 >numberA3 : number
->robotAInfo : (string | number)[]
+>robotAInfo : string[]
 >robotA : [number, string, string]
 
 if (nameA == nameA2) {
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPattern3.types b/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPattern3.types
index bdd2059b863e8..3e5018a76c168 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPattern3.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPattern3.types
@@ -222,7 +222,7 @@ let multiRobotAInfo: (string | [string, string])[];
 
 [numberB, ...robotAInfo] = robotB;
 >[numberB, ...robotAInfo] = robotB : [number, string, string]
->[numberB, ...robotAInfo] : (string | number)[]
+>[numberB, ...robotAInfo] : [number, ...(string | number)[]]
 >numberB : number
 >...robotAInfo : string | number
 >robotAInfo : (string | number)[]
@@ -230,7 +230,7 @@ let multiRobotAInfo: (string | [string, string])[];
 
 [numberB, ...robotAInfo] = getRobotB();
 >[numberB, ...robotAInfo] = getRobotB() : [number, string, string]
->[numberB, ...robotAInfo] : (string | number)[]
+>[numberB, ...robotAInfo] : [number, ...(string | number)[]]
 >numberB : number
 >...robotAInfo : string | number
 >robotAInfo : (string | number)[]
@@ -239,7 +239,7 @@ let multiRobotAInfo: (string | [string, string])[];
 
 [numberB, ...robotAInfo] = <Robot>[2, "trimmer", "trimming"];
 >[numberB, ...robotAInfo] = <Robot>[2, "trimmer", "trimming"] : [number, string, string]
->[numberB, ...robotAInfo] : (string | number)[]
+>[numberB, ...robotAInfo] : [number, ...(string | number)[]]
 >numberB : number
 >...robotAInfo : string | number
 >robotAInfo : (string | number)[]
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPatternDefaultValues.types b/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPatternDefaultValues.types
index fae55a6cabfef..4a166d0356995 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPatternDefaultValues.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPatternDefaultValues.types
@@ -73,7 +73,7 @@ let [numberA3 = -1, ...robotAInfo] = robotA;
 >numberA3 : number
 >-1 : -1
 >1 : 1
->robotAInfo : (string | number)[]
+>robotAInfo : string[]
 >robotA : [number, string, string]
 
 if (nameA == nameA2) {
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPatternDefaultValues3.types b/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPatternDefaultValues3.types
index 35c458f431066..e0c39abebc6b0 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPatternDefaultValues3.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPatternDefaultValues3.types
@@ -238,11 +238,11 @@ let multiRobotAInfo: (string | string[])[];
 
 [nameMB = "helloNoName", [primarySkillB = "noSkill", secondarySkillB = "noSkill"] = []] = multiRobotB;
 >[nameMB = "helloNoName", [primarySkillB = "noSkill", secondarySkillB = "noSkill"] = []] = multiRobotB : [string, string[]]
->[nameMB = "helloNoName", [primarySkillB = "noSkill", secondarySkillB = "noSkill"] = []] : [string, [string, string]]
+>[nameMB = "helloNoName", [primarySkillB = "noSkill", secondarySkillB = "noSkill"] = []] : [string, [string?, string?]]
 >nameMB = "helloNoName" : "helloNoName"
 >nameMB : string
 >"helloNoName" : "helloNoName"
->[primarySkillB = "noSkill", secondarySkillB = "noSkill"] = [] : [string, string]
+>[primarySkillB = "noSkill", secondarySkillB = "noSkill"] = [] : [string?, string?]
 >[primarySkillB = "noSkill", secondarySkillB = "noSkill"] : [string, string]
 >primarySkillB = "noSkill" : "noSkill"
 >primarySkillB : string
@@ -250,16 +250,16 @@ let multiRobotAInfo: (string | string[])[];
 >secondarySkillB = "noSkill" : "noSkill"
 >secondarySkillB : string
 >"noSkill" : "noSkill"
->[] : [string, string]
+>[] : [string?, string?]
 >multiRobotB : [string, string[]]
 
 [nameMB = "helloNoName", [primarySkillB = "noSkill", secondarySkillB = "noSkill"] = []] = getMultiRobotB();
 >[nameMB = "helloNoName", [primarySkillB = "noSkill", secondarySkillB = "noSkill"] = []] = getMultiRobotB() : [string, string[]]
->[nameMB = "helloNoName", [primarySkillB = "noSkill", secondarySkillB = "noSkill"] = []] : [string, [string, string]]
+>[nameMB = "helloNoName", [primarySkillB = "noSkill", secondarySkillB = "noSkill"] = []] : [string, [string?, string?]]
 >nameMB = "helloNoName" : "helloNoName"
 >nameMB : string
 >"helloNoName" : "helloNoName"
->[primarySkillB = "noSkill", secondarySkillB = "noSkill"] = [] : [string, string]
+>[primarySkillB = "noSkill", secondarySkillB = "noSkill"] = [] : [string?, string?]
 >[primarySkillB = "noSkill", secondarySkillB = "noSkill"] : [string, string]
 >primarySkillB = "noSkill" : "noSkill"
 >primarySkillB : string
@@ -267,17 +267,17 @@ let multiRobotAInfo: (string | string[])[];
 >secondarySkillB = "noSkill" : "noSkill"
 >secondarySkillB : string
 >"noSkill" : "noSkill"
->[] : [string, string]
+>[] : [string?, string?]
 >getMultiRobotB() : [string, string[]]
 >getMultiRobotB : () => [string, string[]]
 
 [nameMB = "helloNoName", [primarySkillB = "noSkill", secondarySkillB = "noSkill"] = []] =
 >[nameMB = "helloNoName", [primarySkillB = "noSkill", secondarySkillB = "noSkill"] = []] =    ["trimmer", ["trimming", "edging"]] : [string, [string, string]]
->[nameMB = "helloNoName", [primarySkillB = "noSkill", secondarySkillB = "noSkill"] = []] : [string, [string, string]]
+>[nameMB = "helloNoName", [primarySkillB = "noSkill", secondarySkillB = "noSkill"] = []] : [string, [string?, string?]]
 >nameMB = "helloNoName" : "helloNoName"
 >nameMB : string
 >"helloNoName" : "helloNoName"
->[primarySkillB = "noSkill", secondarySkillB = "noSkill"] = [] : [string, string]
+>[primarySkillB = "noSkill", secondarySkillB = "noSkill"] = [] : [string?, string?]
 >[primarySkillB = "noSkill", secondarySkillB = "noSkill"] : [string, string]
 >primarySkillB = "noSkill" : "noSkill"
 >primarySkillB : string
@@ -285,7 +285,7 @@ let multiRobotAInfo: (string | string[])[];
 >secondarySkillB = "noSkill" : "noSkill"
 >secondarySkillB : string
 >"noSkill" : "noSkill"
->[] : [string, string]
+>[] : [string?, string?]
 
     ["trimmer", ["trimming", "edging"]];
 >["trimmer", ["trimming", "edging"]] : [string, [string, string]]
@@ -296,7 +296,7 @@ let multiRobotAInfo: (string | string[])[];
 
 [numberB = -1, ...robotAInfo] = robotB;
 >[numberB = -1, ...robotAInfo] = robotB : [number, string, string]
->[numberB = -1, ...robotAInfo] : (string | number)[]
+>[numberB = -1, ...robotAInfo] : [number, ...(string | number)[]]
 >numberB = -1 : -1
 >numberB : number
 >-1 : -1
@@ -307,7 +307,7 @@ let multiRobotAInfo: (string | string[])[];
 
 [numberB = -1, ...robotAInfo] = getRobotB();
 >[numberB = -1, ...robotAInfo] = getRobotB() : [number, string, string]
->[numberB = -1, ...robotAInfo] : (string | number)[]
+>[numberB = -1, ...robotAInfo] : [number, ...(string | number)[]]
 >numberB = -1 : -1
 >numberB : number
 >-1 : -1
@@ -319,7 +319,7 @@ let multiRobotAInfo: (string | string[])[];
 
 [numberB = -1, ...robotAInfo] = <Robot>[2, "trimmer", "trimming"];
 >[numberB = -1, ...robotAInfo] = <Robot>[2, "trimmer", "trimming"] : [number, string, string]
->[numberB = -1, ...robotAInfo] : (string | number)[]
+>[numberB = -1, ...robotAInfo] : [number, ...(string | number)[]]
 >numberB = -1 : -1
 >numberB : number
 >-1 : -1

From cffa1dd2d02703ef5f229aa14435bdaad23b8156 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Thu, 21 Jun 2018 17:23:27 -1000
Subject: [PATCH 27/37] Accept new baselines

---
 tests/baselines/reference/for-of49.errors.txt | 14 --------------
 1 file changed, 14 deletions(-)
 delete mode 100644 tests/baselines/reference/for-of49.errors.txt

diff --git a/tests/baselines/reference/for-of49.errors.txt b/tests/baselines/reference/for-of49.errors.txt
deleted file mode 100644
index aaf29f5bfe3eb..0000000000000
--- a/tests/baselines/reference/for-of49.errors.txt
+++ /dev/null
@@ -1,14 +0,0 @@
-tests/cases/conformance/es6/for-ofStatements/for-of49.ts(3,14): error TS2322: Type 'string | boolean' is not assignable to type 'boolean'.
-  Type 'string' is not assignable to type 'boolean'.
-
-
-==== tests/cases/conformance/es6/for-ofStatements/for-of49.ts (1 errors) ====
-    var k: string, v: boolean;
-    var map = new Map([["", true]]);
-    for ([k, ...[v]] of map) {
-                 ~
-!!! error TS2322: Type 'string | boolean' is not assignable to type 'boolean'.
-!!! error TS2322:   Type 'string' is not assignable to type 'boolean'.
-        k;
-        v;
-    }
\ No newline at end of file

From 0a94f77b728ce55ea4a08d35e18be919198d239b Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Thu, 21 Jun 2018 17:29:24 -1000
Subject: [PATCH 28/37] Accept new baselines

---
 tests/baselines/reference/iterableArrayPattern14.types | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tests/baselines/reference/iterableArrayPattern14.types b/tests/baselines/reference/iterableArrayPattern14.types
index fcea515d543ec..986b17d3126b2 100644
--- a/tests/baselines/reference/iterableArrayPattern14.types
+++ b/tests/baselines/reference/iterableArrayPattern14.types
@@ -41,13 +41,13 @@ class FooIterator {
 }
 
 function fun(...[a, ...b]) { }
->fun : (...[a, ...b]: Iterable<any>) => void
+>fun : (__0_0: any, __0_1?: any) => void
 >a : any
 >b : any[]
 
 fun(new FooIterator);
 >fun(new FooIterator) : void
->fun : (...[a, ...b]: Iterable<any>) => void
+>fun : (__0_0: any, __0_1?: any) => void
 >new FooIterator : FooIterator
 >FooIterator : typeof FooIterator
 

From b650d7d06b150477c340bd0f28b727031a723a6b Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Fri, 22 Jun 2018 06:26:52 -1000
Subject: [PATCH 29/37] Fix issue

---
 src/compiler/checker.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 2b2d3acd712cd..fd8123a5571b9 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -6226,7 +6226,7 @@ namespace ts {
                 /*resolvedTypePredicate*/ undefined, sig.minArgumentCount, sig.hasRestParameter, sig.hasLiteralTypes);
         }
 
-        function getExpandedParameters(sig: Signature): Symbol[] {
+        function getExpandedParameters(sig: Signature): ReadonlyArray<Symbol> {
             if (sig.hasRestParameter) {
                 const restIndex = sig.parameters.length - 1;
                 const restParameter = sig.parameters[restIndex];

From 88444fe41470466846bb55a53fc1449411cb64ec Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Fri, 22 Jun 2018 06:26:59 -1000
Subject: [PATCH 30/37] Accept new baselines

---
 tests/baselines/reference/outfile-concat.js | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/tests/baselines/reference/outfile-concat.js b/tests/baselines/reference/outfile-concat.js
index 80061c7d981f8..e231f54ef9409 100644
--- a/tests/baselines/reference/outfile-concat.js
+++ b/tests/baselines/reference/outfile-concat.js
@@ -44,7 +44,7 @@ declare function f(): string;
 //# sourceMappingURL=first-output.d.ts.map
 
 //// [/src/first/bin/first-output.d.ts.map]
-{"version":3,"file":"first-output.d.ts","sourceRoot":"","sources":["../first_part1.ts","../first_part2.ts","../first_part3.ts"],"names":[],"mappings":"AAAA,UAAU,QAAQ;IACd,IAAI,EAAE,GAAG,CAAC;CACb;AAED,QAAA,MAAM,CAAC,iBAAiB,CAAC;AAEzB,UAAU,iBAAiB;IACvB,IAAI,EAAE,GAAG,CAAC;CACb;AERD,6BAEC"}
+{"version":3,"file":"first-output.d.ts","sourceRoot":"","sources":["../first_PART1.ts","../first_part2.ts","../first_part3.ts"],"names":[],"mappings":"AAAA,UAAU,QAAQ;IACd,IAAI,EAAE,GAAG,CAAC;CACb;AAED,QAAA,MAAM,CAAC,iBAAiB,CAAC;AAEzB,UAAU,iBAAiB;IACvB,IAAI,EAAE,GAAG,CAAC;CACb;AERD,6BAEC"}
 
 //// [/src/first/bin/first-output.js]
 var s = "Hello, world";
@@ -56,7 +56,7 @@ function f() {
 //# sourceMappingURL=first-output.js.map
 
 //// [/src/first/bin/first-output.js.map]
-{"version":3,"file":"first-output.js","sourceRoot":"","sources":["../first_part1.ts","../first_part2.ts","../first_part3.ts"],"names":[],"mappings":"AAIA,IAAM,CAAC,GAAG,cAAc,CAAC;AAMzB,OAAO,CAAC,GAAG,CAAC,CAAC,CAAC,CAAC;ACVf,OAAO,CAAC,GAAG,CAAC,CAAC,EAAE,CAAC,CAAC;ACAjB;IACI,OAAO,gBAAgB,CAAC;AAC5B,CAAC"}
+{"version":3,"file":"first-output.js","sourceRoot":"","sources":["../first_PART1.ts","../first_part2.ts","../first_part3.ts"],"names":[],"mappings":"AAIA,IAAM,CAAC,GAAG,cAAc,CAAC;AAMzB,OAAO,CAAC,GAAG,CAAC,CAAC,CAAC,CAAC;ACVf,OAAO,CAAC,GAAG,CAAC,CAAC,EAAE,CAAC,CAAC;ACAjB;IACI,OAAO,gBAAgB,CAAC;AAC5B,CAAC"}
 
 //// [/src/third/thirdjs/output/third-output.d.ts]
 interface TheFirst {
@@ -80,7 +80,7 @@ declare var c: C;
 //# sourceMappingURL=third-output.d.ts.map
 
 //// [/src/third/thirdjs/output/third-output.d.ts.map]
-{"version":3,"file":"third-output.d.ts","sourceRoot":"","sources":["../../third_part1.ts","../../../first/first_part1.ts","../../../first/first_part3.ts","../../../second/second_part1.ts","../../../second/second_part2.ts"],"names":[],"mappings":"ACAA,UAAU,QAAQ;IACd,IAAI,EAAE,GAAG,CAAC;CACb;AAED,QAAA,MAAM,CAAC,iBAAiB,CAAC;AAEzB,UAAU,iBAAiB;IACvB,IAAI,EAAE,GAAG,CAAC;CACb;ACRD,6BAEC;;ACFD,kBAAU,CAAC,CAAC;CAEX;AAED,kBAAU,CAAC,CAAC;CAMX;ACVD;IACI,WAAW;CAGd;;AJJD,QAAA,IAAI,CAAC,GAAU,CAAC"}
+{"version":3,"file":"third-output.d.ts","sourceRoot":"","sources":["../../third_part1.ts","../../../first/first_PART1.ts","../../../first/first_part3.ts","../../../second/second_part1.ts","../../../second/second_part2.ts"],"names":[],"mappings":"ACAA,UAAU,QAAQ;IACd,IAAI,EAAE,GAAG,CAAC;CACb;AAED,QAAA,MAAM,CAAC,iBAAiB,CAAC;AAEzB,UAAU,iBAAiB;IACvB,IAAI,EAAE,GAAG,CAAC;CACb;ACRD,6BAEC;;ACFD,kBAAU,CAAC,CAAC;CAEX;AAED,kBAAU,CAAC,CAAC;CAMX;ACVD;IACI,WAAW;CAGd;;AJJD,QAAA,IAAI,CAAC,GAAU,CAAC"}
 
 //// [/src/third/thirdjs/output/third-output.js]
 var s = "Hello, world";
@@ -111,5 +111,5 @@ c.doSomething();
 //# sourceMappingURL=third-output.js.map
 
 //// [/src/third/thirdjs/output/third-output.js.map]
-{"version":3,"file":"third-output.js","sourceRoot":"","sources":["../../third_part1.ts","../../../first/first_part1.ts","../../../first/first_part2.ts","../../../first/first_part3.ts","../../../second/second_part1.ts","../../../second/second_part2.ts"],"names":[],"mappings":"ACIA,IAAM,CAAC,GAAG,cAAc,CAAC;AAMzB,OAAO,CAAC,GAAG,CAAC,CAAC,CAAC,CAAC;ACVf,OAAO,CAAC,GAAG,CAAC,CAAC,EAAE,CAAC,CAAC;ACAjB;IACI,OAAO,gBAAgB,CAAC;AAC5B,CAAC;;ACED,IAAU,CAAC,CAMV;AAND,WAAU,CAAC;IACP;QACI,OAAO,CAAC,GAAG,CAAC,SAAS,CAAC,CAAC;IAC3B,CAAC;IAED,CAAC,EAAE,CAAC;AACR,CAAC,EANS,CAAC,KAAD,CAAC,QAMV;ACVD;IAAA;IAIA,CAAC;IAHG,uBAAW,GAAX;QACI,OAAO,CAAC,GAAG,CAAC,oBAAoB,CAAC,CAAC;IACtC,CAAC;IACL,QAAC;AAAD,CAAC,AAJD,IAIC;;ALJD,IAAI,CAAC,GAAG,IAAI,CAAC,EAAE,CAAC;AAChB,CAAC,CAAC,WAAW,EAAE,CAAC"}
+{"version":3,"file":"third-output.js","sourceRoot":"","sources":["../../third_part1.ts","../../../first/first_PART1.ts","../../../first/first_part2.ts","../../../first/first_part3.ts","../../../second/second_part1.ts","../../../second/second_part2.ts"],"names":[],"mappings":"ACIA,IAAM,CAAC,GAAG,cAAc,CAAC;AAMzB,OAAO,CAAC,GAAG,CAAC,CAAC,CAAC,CAAC;ACVf,OAAO,CAAC,GAAG,CAAC,CAAC,EAAE,CAAC,CAAC;ACAjB;IACI,OAAO,gBAAgB,CAAC;AAC5B,CAAC;;ACED,IAAU,CAAC,CAMV;AAND,WAAU,CAAC;IACP;QACI,OAAO,CAAC,GAAG,CAAC,SAAS,CAAC,CAAC;IAC3B,CAAC;IAED,CAAC,EAAE,CAAC;AACR,CAAC,EANS,CAAC,KAAD,CAAC,QAMV;ACVD;IAAA;IAIA,CAAC;IAHG,uBAAW,GAAX;QACI,OAAO,CAAC,GAAG,CAAC,oBAAoB,CAAC,CAAC;IACtC,CAAC;IACL,QAAC;AAAD,CAAC,AAJD,IAIC;;ALJD,IAAI,CAAC,GAAG,IAAI,CAAC,EAAE,CAAC;AAChB,CAAC,CAAC,WAAW,EAAE,CAAC"}
 

From 28c9f5933aedd9ee19cf45e992f34539c20fd530 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Sun, 24 Jun 2018 14:32:41 -1000
Subject: [PATCH 31/37] Complete support for rest elements in tuples

---
 src/compiler/checker.ts              | 168 +++++++++++++++++----------
 src/compiler/diagnosticMessages.json |  20 ++++
 src/compiler/types.ts                |   1 +
 3 files changed, 129 insertions(+), 60 deletions(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index fd8123a5571b9..9d9a6d2f1ec7a 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -6232,13 +6232,15 @@ namespace ts {
                 const restParameter = sig.parameters[restIndex];
                 const restType = getTypeOfSymbol(restParameter);
                 if (isTupleType(restType)) {
-                    const elementTypes = (<TypeReference>restType).typeArguments || emptyArray;
-                    const minLength = (<TupleType>(<TypeReference>restType).target).minLength;
+                    const elementTypes = restType.typeArguments || emptyArray;
+                    const minLength = restType.target.minLength;
+                    const tupleRestIndex = restType.target.hasRestElement ? elementTypes.length - 1 : -1;
                     const restParams = map(elementTypes, (t, i) => {
                         const name = getParameterNameAtPosition(sig, restIndex + i);
-                        const checkFlags = i >= minLength ? CheckFlags.OptionalParameter : 0;
+                        const checkFlags = i === tupleRestIndex ? CheckFlags.RestParameter :
+                            i >= minLength ? CheckFlags.OptionalParameter : 0;
                         const symbol = createSymbol(SymbolFlags.FunctionScopedVariable, name, checkFlags);
-                        symbol.type = t;
+                        symbol.type = i === tupleRestIndex ? createArrayType(t) : t;
                         return symbol;
                     });
                     return concatenate(sig.parameters.slice(0, restIndex), restParams);
@@ -8372,7 +8374,7 @@ namespace ts {
                 const minLength = findLastIndex(node.elementTypes, n => n.kind !== SyntaxKind.OptionalType && n !== restElement) + 1;
                 const elementTypes = map(node.elementTypes, n => {
                     const type = getTypeFromTypeNode(n);
-                    return n === restElement ? getIndexTypeOfType(type, IndexKind.Number) || errorType : type;
+                    return n === restElement && getIndexTypeOfType(type, IndexKind.Number) || type;
                 });
                 links.resolvedType = createTupleType(elementTypes, minLength, !!restElement);
             }
@@ -8887,6 +8889,12 @@ namespace ts {
                     }
                     return getTypeOfSymbol(prop);
                 }
+                if (isTupleType(objectType)) {
+                    const restType = getRestTypeOfTupleType(objectType);
+                    if (restType && isNumericLiteralName(propName) && +propName >= 0) {
+                        return restType;
+                    }
+                }
             }
             if (!(indexType.flags & TypeFlags.Nullable) && isTypeAssignableToKind(indexType, TypeFlags.StringLike | TypeFlags.NumberLike | TypeFlags.ESSymbolLike)) {
                 if (isTypeAny(objectType)) {
@@ -11343,6 +11351,33 @@ namespace ts {
                     }
                 }
                 let result = Ternary.True;
+                if (isTupleType(target)) {
+                    const targetRestType = getRestTypeOfTupleType(target);
+                    if (targetRestType) {
+                        if (!isTupleType(source)) {
+                            return Ternary.False;
+                        }
+                        const sourceRestType = getRestTypeOfTupleType(source);
+                        if (sourceRestType && !isRelatedTo(sourceRestType, targetRestType, reportErrors)) {
+                            if (reportErrors) {
+                                reportError(Diagnostics.Rest_signatures_are_incompatible);
+                            }
+                            return Ternary.False;
+                        }
+                        const targetCount = getTypeReferenceArity(target) - 1;
+                        const sourceCount = getTypeReferenceArity(source) - (sourceRestType ? 1 : 0);
+                        for (let i = targetCount; i < sourceCount; i++) {
+                            const related = isRelatedTo((<TypeReference>source).typeArguments![i], targetRestType, reportErrors);
+                            if (!related) {
+                                if (reportErrors) {
+                                    reportError(Diagnostics.Property_0_is_incompatible_with_rest_element_type, "" + i);
+                                }
+                                return Ternary.False;
+                            }
+                            result &= related;
+                        }
+                    }
+                }
                 const properties = getPropertiesOfObjectType(target);
                 for (const targetProp of properties) {
                     if (!(targetProp.flags & SymbolFlags.Prototype)) {
@@ -11417,35 +11452,6 @@ namespace ts {
                         }
                     }
                 }
-                if (isTupleType(target)) {
-                    const targetRestType = getRestTypeOfTupleType(target);
-                    if (targetRestType) {
-                        if (!isTupleType(source)) {
-                            return Ternary.False;
-                        }
-                        const sourceRestType = getRestTypeOfTupleType(source);
-                        if (sourceRestType && !isRelatedTo(sourceRestType, targetRestType, reportErrors)) {
-                            if (reportErrors) {
-                                // !!! Rest element types are incompatible
-                                reportError(Diagnostics.Index_signatures_are_incompatible);
-                            }
-                            return Ternary.False;
-                        }
-                        const targetCount = getTypeReferenceArity(target) - 1;
-                        const sourceCount = getTypeReferenceArity(source) - (sourceRestType ? 1 : 0);
-                        for (let i = targetCount; i < sourceCount; i++) {
-                            const related = isRelatedTo((<TypeReference>source).typeArguments![i], targetRestType, reportErrors);
-                            if (!related) {
-                                if (reportErrors) {
-                                    // !!! Property {0} is incompatible with rest element type
-                                    reportError(Diagnostics.Property_0_is_incompatible_with_index_signature, "" + i);
-                                }
-                                return Ternary.False;
-                            }
-                            result &= related;
-                        }
-                    }
-                }
                 return result;
             }
 
@@ -12506,7 +12512,7 @@ namespace ts {
                     }
                     const minArgumentCount = getMinArgumentCount(source);
                     const minLength = minArgumentCount < paramCount ? 0 : minArgumentCount - paramCount;
-                    const rest = sourceHasRest ? createArrayType(getUnionType(types)) : createTupleType(types, minLength, /*hasRestElement*/ false, names);
+                    const rest = createTupleType(types, minLength, sourceHasRest, names);
                     callback(rest, targetRestTypeVariable);
                 }
             }
@@ -17865,14 +17871,12 @@ namespace ts {
             }
         }
 
+        function isSpreadArgument(arg: Expression | undefined) {
+            return !!arg && (arg.kind === SyntaxKind.SpreadElement || arg.kind === SyntaxKind.SyntheticExpression && (<SyntheticExpression>arg).isSpread);
+        }
+
         function getSpreadArgumentIndex(args: ReadonlyArray<Expression>): number {
-            for (let i = 0; i < args.length; i++) {
-                const arg = args[i];
-                if (arg && arg.kind === SyntaxKind.SpreadElement) {
-                    return i;
-                }
-            }
-            return -1;
+            return findIndex(args, isSpreadArgument);
         }
 
         function hasCorrectArity(node: CallLikeExpression, args: ReadonlyArray<Expression>, signature: Signature, signatureHelpTrailingComma = false) {
@@ -18091,7 +18095,7 @@ namespace ts {
         function getSpreadArgumentType(node: CallLikeExpression, args: ReadonlyArray<Expression>, index: number, argCount: number, restType: TypeParameter, context: InferenceContext | undefined) {
             if (index === argCount - 1) {
                 const arg = getEffectiveArgument(node, args, index);
-                if (arg && arg.kind === SyntaxKind.SpreadElement) {
+                if (isSpreadArgument(arg)) {
                     // We are inferring from a spread expression in the last argument position, i.e. both the parameter
                     // and the argument are ...x forms.
                     return checkExpressionWithContextualType((<SpreadElement>arg).expression, restType, context);
@@ -18100,16 +18104,20 @@ namespace ts {
             const contextualType = getIndexTypeOfType(restType, IndexKind.Number) || anyType;
             const hasPrimitiveContextualType = maybeTypeOfKind(contextualType, TypeFlags.Primitive | TypeFlags.Index);
             const types = [];
-            let hasSpreadExpression = false;
+            let spreadIndex = -1;
             for (let i = index; i < argCount; i++) {
                 let argType = getEffectiveArgumentType(node, i);
                 if (!argType) {
                     argType = checkExpressionWithContextualType(args[i], contextualType, context);
-                    hasSpreadExpression = hasSpreadExpression || args[i].kind === SyntaxKind.SpreadElement;
+                    if (spreadIndex < 0 && isSpreadArgument(args[i])) {
+                        spreadIndex = i - index;
+                    }
                 }
                 types.push(hasPrimitiveContextualType ? getRegularTypeOfLiteralType(argType) : getWidenedLiteralType(argType));
             }
-            return hasSpreadExpression ? createArrayType(getUnionType(types)) : createTupleType(types);
+            return spreadIndex < 0 ?
+                createTupleType(types) :
+                createTupleType(append(types.slice(0, spreadIndex), getUnionType(types.slice(spreadIndex))), spreadIndex, /*hasRestElement*/ true);
         }
 
         function checkTypeArguments(signature: Signature, typeArgumentNodes: ReadonlyArray<TypeNode>, reportErrors: boolean, headMessage?: DiagnosticMessage): Type[] | false {
@@ -18205,7 +18213,7 @@ namespace ts {
                 const arg = getEffectiveArgument(node, args, i);
                 // If the effective argument is 'undefined', then it is an argument that is present but is synthetic.
                 if (arg === undefined || arg.kind !== SyntaxKind.OmittedExpression) {
-                    if (i === restIndex && (restType.flags & TypeFlags.TypeParameter || arg && arg.kind === SyntaxKind.SpreadElement && !isArrayType(restType))) {
+                    if (i === restIndex && (restType.flags & TypeFlags.TypeParameter || isSpreadArgument(arg) && !isArrayType(restType))) {
                         const spreadType = getSpreadArgumentType(node, args, i, argCount, restType, /*context*/ undefined);
                         return checkTypeRelatedTo(spreadType, restType, relation, arg, headMessage);
                     }
@@ -18275,17 +18283,20 @@ namespace ts {
             else {
                 const args = node.arguments || emptyArray;
                 const length = args.length;
-                if (length && args[length - 1].kind === SyntaxKind.SpreadElement && getSpreadArgumentIndex(args) === length - 1) {
+                if (length && isSpreadArgument(args[length - 1]) && getSpreadArgumentIndex(args) === length - 1) {
                     // We have a spread argument in the last position and no other spread arguments. If the type
                     // of the argument is a tuple type, spread the tuple elements into the argument list. We can
                     // call checkExpressionCached because spread expressions never have a contextual type.
                     const spreadArgument = <SpreadElement>args[length - 1];
                     const type = checkExpressionCached(spreadArgument.expression);
                     if (isTupleType(type)) {
-                        const syntheticArgs = map((<TypeReference>type).typeArguments || emptyArray, t => {
+                        const typeArguments = (<TypeReference>type).typeArguments || emptyArray;
+                        const restIndex = type.target.hasRestElement ? typeArguments.length - 1 : -1;
+                        const syntheticArgs = map(typeArguments, (t, i) => {
                             const arg = <SyntheticExpression>createNode(SyntaxKind.SyntheticExpression, spreadArgument.pos, spreadArgument.end);
                             arg.parent = spreadArgument;
                             arg.type = t;
+                            arg.isSpread = i === restIndex;
                             return arg;
                         });
                         return concatenate(args.slice(0, length - 1), syntheticArgs);
@@ -19601,9 +19612,12 @@ namespace ts {
             if (signature.hasRestParameter) {
                 const restType = getTypeOfSymbol(signature.parameters[paramCount]);
                 if (isTupleType(restType)) {
-                    const elementCount = ((<TypeReference>restType).typeArguments || emptyArray).length;
-                    if (pos - paramCount < elementCount) {
-                        return (<TypeReference>restType).typeArguments![pos - paramCount];
+                    if (pos - paramCount < getLengthOfTupleType(restType)) {
+                        return restType.typeArguments![pos - paramCount];
+                    }
+                    const tupleRestType = getRestTypeOfTupleType(restType);
+                    if (tupleRestType) {
+                        return tupleRestType;
                     }
                 }
                 return getIndexTypeOfType(restType, IndexKind.Number) || anyType;
@@ -19612,7 +19626,14 @@ namespace ts {
         }
 
         function getTypeOfRestParameter(signature: Signature) {
-            return signature.hasRestParameter ? getTypeOfSymbol(signature.parameters[signature.parameters.length - 1]) : undefined;
+            if (signature.hasRestParameter) {
+                const restType = getTypeOfSymbol(signature.parameters[signature.parameters.length - 1]);
+                if (isTupleType(restType)) {
+                    return getRestTypeOfTupleType(restType);
+                }
+                return restType;
+            }
+            return undefined;
         }
 
         function getParameterCount(signature: Signature) {
@@ -19620,18 +19641,20 @@ namespace ts {
             if (signature.hasRestParameter) {
                 const restType = getTypeOfSymbol(signature.parameters[length - 1]);
                 if (isTupleType(restType)) {
-                    return length + ((<TypeReference>restType).typeArguments || emptyArray).length - 1;
+                    return length + (restType.typeArguments || emptyArray).length - 1;
                 }
             }
             return length;
         }
 
         function getMinArgumentCount(signature: Signature) {
-            const restType = getTypeOfRestParameter(signature);
-            if (restType && isTupleType(restType)) {
-                const minLength = (<TupleType>(<TypeReference>restType).target).minLength;
-                if (minLength > 0) {
-                    return signature.parameters.length - 1 + minLength;
+            if (signature.hasRestParameter) {
+                const restType = getTypeOfSymbol(signature.parameters[signature.parameters.length - 1]);
+                if (isTupleType(restType)) {
+                    const minLength = restType.target.minLength;
+                    if (minLength > 0) {
+                        return signature.parameters.length - 1 + minLength;
+                    }
                 }
             }
             return signature.minArgumentCount;
@@ -19648,7 +19671,11 @@ namespace ts {
         }
 
         function hasEffectiveRestParameter(signature: Signature) {
-            return signature.hasRestParameter && !isTupleType(getTypeOfSymbol(signature.parameters[signature.parameters.length - 1]));
+            if (signature.hasRestParameter) {
+                const restType = getTypeOfSymbol(signature.parameters[signature.parameters.length - 1]);
+                return !isTupleType(restType) || restType.target.hasRestElement;
+            }
+            return false;
         }
 
         function getTypeOfFirstParameterOfSignature(signature: Signature) {
@@ -21928,6 +21955,27 @@ namespace ts {
         }
 
         function checkTupleType(node: TupleTypeNode) {
+            const elementTypes = node.elementTypes;
+            let seenOptionalElement = false;
+            for (let i = 0; i < elementTypes.length; i++) {
+                const e = elementTypes[i];
+                if (e.kind === SyntaxKind.RestType) {
+                    if (i !== elementTypes.length - 1) {
+                        grammarErrorOnNode(e, Diagnostics.A_rest_element_must_be_last_in_a_tuple_type);
+                        break;
+                    }
+                    if (!isArrayType(getTypeFromTypeNode(e))) {
+                        error(e, Diagnostics.A_rest_element_type_must_be_an_array_type);
+                    }
+                }
+                else if (e.kind === SyntaxKind.OptionalType) {
+                    seenOptionalElement = true;
+                }
+                else if (seenOptionalElement) {
+                    grammarErrorOnNode(e, Diagnostics.A_required_element_cannot_follow_an_optional_element);
+                    break;
+                }
+            }
             checkGrammarForDisallowedTrailingComma(node.elementTypes);
             forEach(node.elementTypes, checkSourceElement);
         }
diff --git a/src/compiler/diagnosticMessages.json b/src/compiler/diagnosticMessages.json
index b31e404a3dff3..53e9f0c30bfaa 100644
--- a/src/compiler/diagnosticMessages.json
+++ b/src/compiler/diagnosticMessages.json
@@ -843,6 +843,14 @@
         "category": "Error",
         "code": 1255
     },
+    "A rest element must be last in a tuple type.": {
+        "category": "Error",
+        "code": 1256
+    },
+    "A required element cannot follow an optional element.": {
+        "category": "Error",
+        "code": 1257
+    },
     "'with' statements are not allowed in an async function block.": {
         "category": "Error",
         "code": 1300
@@ -2028,6 +2036,18 @@
         "category": "Error",
         "code": 2571
     },
+    "Rest signatures are incompatible.": {
+        "category": "Error",
+        "code": 2572
+    },
+    "Property '{0}' is incompatible with rest element type.": {
+        "category": "Error",
+        "code": 2573
+    },
+    "A rest element type must be an array type.": {
+        "category": "Error",
+        "code": 2574
+    },
     "JSX element attributes type '{0}' may not be a union type.": {
         "category": "Error",
         "code": 2600
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index 6b0dc64c193fd..5b352ddde1e5e 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -1303,6 +1303,7 @@ namespace ts {
 
     export interface SyntheticExpression extends Expression {
         kind: SyntaxKind.SyntheticExpression;
+        isSpread: boolean;
         type: Type;
     }
 

From 9cd8eadfd2f55c6fc88cd30c15b6450e18e79cf6 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Sun, 24 Jun 2018 14:32:50 -1000
Subject: [PATCH 32/37] Update tests

---
 tests/cases/conformance/types/rest/genericRestParameters1.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tests/cases/conformance/types/rest/genericRestParameters1.ts b/tests/cases/conformance/types/rest/genericRestParameters1.ts
index 70c53774ce4b9..d3e65e754ece7 100644
--- a/tests/cases/conformance/types/rest/genericRestParameters1.ts
+++ b/tests/cases/conformance/types/rest/genericRestParameters1.ts
@@ -48,7 +48,7 @@ const x18 = f10(...ns, true);  // (string | number | boolean)[]
 function g10<U extends string[], V extends [number, number]>(u: U, v: V) {
     let x1 = f10(...u);  // U
     let x2 = f10(...v);  // V
-    let x3 = f10(1, ...u);  // (string | number)[]
+    let x3 = f10(1, ...u);  // [number, ...string[]]
     let x4 = f10(...u, ...v);  // (string | number)[]
 }
 
@@ -67,7 +67,7 @@ const z18 = f11(...ns, true);  // (string | number | true)[]
 function g11<U extends string[], V extends [number, number]>(u: U, v: V) {
     let x1 = f11(...u);  // U
     let x2 = f11(...v);  // V
-    let x3 = f11(1, ...u);  // (string | 1)[]
+    let x3 = f11(1, ...u);  // [1, ...string[]]
     let x4 = f11(...u, ...v);  // (string | number)[]
 }
 

From 3cc3b4903075e586c30d51587df2b74fb52afcb9 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Sun, 24 Jun 2018 14:33:11 -1000
Subject: [PATCH 33/37] Accept new baselines

---
 tests/baselines/reference/api/tsserverlibrary.d.ts   |  6 ++++++
 tests/baselines/reference/api/typescript.d.ts        |  1 +
 .../reference/genericRestParameters1.errors.txt      |  4 ++--
 tests/baselines/reference/genericRestParameters1.js  |  8 ++++----
 .../reference/genericRestParameters1.symbols         |  4 ++--
 .../baselines/reference/genericRestParameters1.types | 12 ++++++------
 .../baselines/reference/iterableArrayPattern14.types |  4 ++--
 .../reference/optionalTupleElements1.errors.txt      |  5 ++++-
 8 files changed, 27 insertions(+), 17 deletions(-)

diff --git a/tests/baselines/reference/api/tsserverlibrary.d.ts b/tests/baselines/reference/api/tsserverlibrary.d.ts
index 73cc29b35d533..acf6047e7993c 100644
--- a/tests/baselines/reference/api/tsserverlibrary.d.ts
+++ b/tests/baselines/reference/api/tsserverlibrary.d.ts
@@ -1479,6 +1479,7 @@ declare namespace ts {
     }
     interface SyntheticExpression extends Expression {
         kind: SyntaxKind.SyntheticExpression;
+        isSpread: boolean;
         type: Type;
     }
     type ExponentiationOperator = SyntaxKind.AsteriskAsteriskToken;
@@ -5048,6 +5049,8 @@ declare namespace ts {
         _0_tag_cannot_be_used_independently_as_a_top_level_JSDoc_tag: DiagnosticMessage;
         A_const_initializer_in_an_ambient_context_must_be_a_string_or_numeric_literal: DiagnosticMessage;
         A_definite_assignment_assertion_is_not_permitted_in_this_context: DiagnosticMessage;
+        A_rest_element_must_be_last_in_a_tuple_type: DiagnosticMessage;
+        A_required_element_cannot_follow_an_optional_element: DiagnosticMessage;
         with_statements_are_not_allowed_in_an_async_function_block: DiagnosticMessage;
         await_expression_is_only_allowed_within_an_async_function: DiagnosticMessage;
         can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment: DiagnosticMessage;
@@ -5344,6 +5347,9 @@ declare namespace ts {
         Type_0_is_not_an_array_type_or_a_string_type_Use_compiler_option_downlevelIteration_to_allow_iterating_of_iterators: DiagnosticMessage;
         Property_0_does_not_exist_on_type_1_Did_you_forget_to_use_await: DiagnosticMessage;
         Object_is_of_type_unknown: DiagnosticMessage;
+        Rest_signatures_are_incompatible: DiagnosticMessage;
+        Property_0_is_incompatible_with_rest_element_type: DiagnosticMessage;
+        A_rest_element_type_must_be_an_array_type: DiagnosticMessage;
         JSX_element_attributes_type_0_may_not_be_a_union_type: DiagnosticMessage;
         The_return_type_of_a_JSX_element_constructor_must_return_an_object_type: DiagnosticMessage;
         JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist: DiagnosticMessage;
diff --git a/tests/baselines/reference/api/typescript.d.ts b/tests/baselines/reference/api/typescript.d.ts
index dc28d7d43d0ed..273e0cad00e45 100644
--- a/tests/baselines/reference/api/typescript.d.ts
+++ b/tests/baselines/reference/api/typescript.d.ts
@@ -888,6 +888,7 @@ declare namespace ts {
     }
     interface SyntheticExpression extends Expression {
         kind: SyntaxKind.SyntheticExpression;
+        isSpread: boolean;
         type: Type;
     }
     type ExponentiationOperator = SyntaxKind.AsteriskAsteriskToken;
diff --git a/tests/baselines/reference/genericRestParameters1.errors.txt b/tests/baselines/reference/genericRestParameters1.errors.txt
index 13828435b5ad6..c923426071478 100644
--- a/tests/baselines/reference/genericRestParameters1.errors.txt
+++ b/tests/baselines/reference/genericRestParameters1.errors.txt
@@ -54,7 +54,7 @@ tests/cases/conformance/types/rest/genericRestParameters1.ts(31,1): error TS2556
     function g10<U extends string[], V extends [number, number]>(u: U, v: V) {
         let x1 = f10(...u);  // U
         let x2 = f10(...v);  // V
-        let x3 = f10(1, ...u);  // (string | number)[]
+        let x3 = f10(1, ...u);  // [number, ...string[]]
         let x4 = f10(...u, ...v);  // (string | number)[]
     }
     
@@ -73,7 +73,7 @@ tests/cases/conformance/types/rest/genericRestParameters1.ts(31,1): error TS2556
     function g11<U extends string[], V extends [number, number]>(u: U, v: V) {
         let x1 = f11(...u);  // U
         let x2 = f11(...v);  // V
-        let x3 = f11(1, ...u);  // (string | 1)[]
+        let x3 = f11(1, ...u);  // [1, ...string[]]
         let x4 = f11(...u, ...v);  // (string | number)[]
     }
     
diff --git a/tests/baselines/reference/genericRestParameters1.js b/tests/baselines/reference/genericRestParameters1.js
index 6817bb43e5142..89d92facba646 100644
--- a/tests/baselines/reference/genericRestParameters1.js
+++ b/tests/baselines/reference/genericRestParameters1.js
@@ -46,7 +46,7 @@ const x18 = f10(...ns, true);  // (string | number | boolean)[]
 function g10<U extends string[], V extends [number, number]>(u: U, v: V) {
     let x1 = f10(...u);  // U
     let x2 = f10(...v);  // V
-    let x3 = f10(1, ...u);  // (string | number)[]
+    let x3 = f10(1, ...u);  // [number, ...string[]]
     let x4 = f10(...u, ...v);  // (string | number)[]
 }
 
@@ -65,7 +65,7 @@ const z18 = f11(...ns, true);  // (string | number | true)[]
 function g11<U extends string[], V extends [number, number]>(u: U, v: V) {
     let x1 = f11(...u);  // U
     let x2 = f11(...v);  // V
-    let x3 = f11(1, ...u);  // (string | 1)[]
+    let x3 = f11(1, ...u);  // [1, ...string[]]
     let x4 = f11(...u, ...v);  // (string | number)[]
 }
 
@@ -187,7 +187,7 @@ var x18 = f10.apply(void 0, ns.concat([true])); // (string | number | boolean)[]
 function g10(u, v) {
     var x1 = f10.apply(void 0, u); // U
     var x2 = f10.apply(void 0, v); // V
-    var x3 = f10.apply(void 0, [1].concat(u)); // (string | number)[]
+    var x3 = f10.apply(void 0, [1].concat(u)); // [number, ...string[]]
     var x4 = f10.apply(void 0, u.concat(v)); // (string | number)[]
 }
 var z10 = f11(42, "hello", true); // [42, "hello", true]
@@ -202,7 +202,7 @@ var z18 = f11.apply(void 0, ns.concat([true])); // (string | number | true)[]
 function g11(u, v) {
     var x1 = f11.apply(void 0, u); // U
     var x2 = f11.apply(void 0, v); // V
-    var x3 = f11.apply(void 0, [1].concat(u)); // (string | 1)[]
+    var x3 = f11.apply(void 0, [1].concat(u)); // [1, ...string[]]
     var x4 = f11.apply(void 0, u.concat(v)); // (string | number)[]
 }
 function call(f) {
diff --git a/tests/baselines/reference/genericRestParameters1.symbols b/tests/baselines/reference/genericRestParameters1.symbols
index dc37a2115430c..d56774eacaea2 100644
--- a/tests/baselines/reference/genericRestParameters1.symbols
+++ b/tests/baselines/reference/genericRestParameters1.symbols
@@ -180,7 +180,7 @@ function g10<U extends string[], V extends [number, number]>(u: U, v: V) {
 >f10 : Symbol(f10, Decl(genericRestParameters1.ts, 30, 16))
 >v : Symbol(v, Decl(genericRestParameters1.ts, 44, 66))
 
-    let x3 = f10(1, ...u);  // (string | number)[]
+    let x3 = f10(1, ...u);  // [number, ...string[]]
 >x3 : Symbol(x3, Decl(genericRestParameters1.ts, 47, 7))
 >f10 : Symbol(f10, Decl(genericRestParameters1.ts, 30, 16))
 >u : Symbol(u, Decl(genericRestParameters1.ts, 44, 61))
@@ -259,7 +259,7 @@ function g11<U extends string[], V extends [number, number]>(u: U, v: V) {
 >f11 : Symbol(f11, Decl(genericRestParameters1.ts, 49, 1))
 >v : Symbol(v, Decl(genericRestParameters1.ts, 63, 66))
 
-    let x3 = f11(1, ...u);  // (string | 1)[]
+    let x3 = f11(1, ...u);  // [1, ...string[]]
 >x3 : Symbol(x3, Decl(genericRestParameters1.ts, 66, 7))
 >f11 : Symbol(f11, Decl(genericRestParameters1.ts, 49, 1))
 >u : Symbol(u, Decl(genericRestParameters1.ts, 63, 61))
diff --git a/tests/baselines/reference/genericRestParameters1.types b/tests/baselines/reference/genericRestParameters1.types
index 1f2e1b1f03dfd..7fc8adefc97bb 100644
--- a/tests/baselines/reference/genericRestParameters1.types
+++ b/tests/baselines/reference/genericRestParameters1.types
@@ -271,9 +271,9 @@ function g10<U extends string[], V extends [number, number]>(u: U, v: V) {
 >...v : number
 >v : V
 
-    let x3 = f10(1, ...u);  // (string | number)[]
->x3 : (string | number)[]
->f10(1, ...u) : (string | number)[]
+    let x3 = f10(1, ...u);  // [number, ...string[]]
+>x3 : [number, ...string[]]
+>f10(1, ...u) : [number, ...string[]]
 >f10 : <T extends unknown[]>(...args: T) => T
 >1 : 1
 >...u : string
@@ -387,9 +387,9 @@ function g11<U extends string[], V extends [number, number]>(u: U, v: V) {
 >...v : number
 >v : V
 
-    let x3 = f11(1, ...u);  // (string | 1)[]
->x3 : (string | 1)[]
->f11(1, ...u) : (string | 1)[]
+    let x3 = f11(1, ...u);  // [1, ...string[]]
+>x3 : [1, ...string[]]
+>f11(1, ...u) : [1, ...string[]]
 >f11 : <T extends (string | number | boolean)[]>(...args: T) => T
 >1 : 1
 >...u : string
diff --git a/tests/baselines/reference/iterableArrayPattern14.types b/tests/baselines/reference/iterableArrayPattern14.types
index 986b17d3126b2..b16b7e39c12cb 100644
--- a/tests/baselines/reference/iterableArrayPattern14.types
+++ b/tests/baselines/reference/iterableArrayPattern14.types
@@ -41,13 +41,13 @@ class FooIterator {
 }
 
 function fun(...[a, ...b]) { }
->fun : (__0_0: any, __0_1?: any) => void
+>fun : (__0_0: any, ...__0_1: any[]) => void
 >a : any
 >b : any[]
 
 fun(new FooIterator);
 >fun(new FooIterator) : void
->fun : (__0_0: any, __0_1?: any) => void
+>fun : (__0_0: any, ...__0_1: any[]) => void
 >new FooIterator : FooIterator
 >FooIterator : typeof FooIterator
 
diff --git a/tests/baselines/reference/optionalTupleElements1.errors.txt b/tests/baselines/reference/optionalTupleElements1.errors.txt
index b9c520c483cf0..e6d7b332c18f3 100644
--- a/tests/baselines/reference/optionalTupleElements1.errors.txt
+++ b/tests/baselines/reference/optionalTupleElements1.errors.txt
@@ -22,6 +22,7 @@ tests/cases/conformance/types/tuple/optionalTupleElements1.ts(23,5): error TS232
   Types of property '0' are incompatible.
     Type 'number | undefined' is not assignable to type 'number'.
       Type 'undefined' is not assignable to type 'number'.
+tests/cases/conformance/types/tuple/optionalTupleElements1.ts(30,29): error TS1257: A required element cannot follow an optional element.
 tests/cases/conformance/types/tuple/optionalTupleElements1.ts(34,5): error TS2322: Type '[number, string | undefined, boolean]' is not assignable to type '[number, string, boolean]'.
   Type 'string | undefined' is not assignable to type 'string'.
     Type 'undefined' is not assignable to type 'string'.
@@ -41,7 +42,7 @@ tests/cases/conformance/types/tuple/optionalTupleElements1.ts(42,5): error TS232
       Type 'undefined' is not assignable to type 'number'.
 
 
-==== tests/cases/conformance/types/tuple/optionalTupleElements1.ts (11 errors) ====
+==== tests/cases/conformance/types/tuple/optionalTupleElements1.ts (12 errors) ====
     type T1 = [number, string, boolean];
     type T2 = [number, string, boolean?];
     type T3 = [number, string?, boolean?];
@@ -102,6 +103,8 @@ tests/cases/conformance/types/tuple/optionalTupleElements1.ts(42,5): error TS232
     }
     
     type T5 = [number, string?, boolean];
+                                ~~~~~~~
+!!! error TS1257: A required element cannot follow an optional element.
     type L5 = T5["length"];
     
     function f2(t1: T1, t2: T2, t3: T3, t4: T4, t5: T5) {

From d7443f04fd3b66d0b32855c92ff1e08888c46a10 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Mon, 25 Jun 2018 10:45:02 -1000
Subject: [PATCH 34/37] Contextual typing by tuple rest elements

---
 src/compiler/checker.ts | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 9d9a6d2f1ec7a..1e94126722f55 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -15531,8 +15531,19 @@ namespace ts {
 
         function getTypeOfPropertyOfContextualType(type: Type, name: __String) {
             return mapType(type, t => {
-                const prop = t.flags & TypeFlags.StructuredType ? getPropertyOfType(t, name) : undefined;
-                return prop ? getTypeOfSymbol(prop) : undefined;
+                if (t.flags & TypeFlags.StructuredType) {
+                    const prop = getPropertyOfType(t, name);
+                    if (prop) {
+                        return getTypeOfSymbol(prop);
+                    }
+                    if (isTupleType(t)) {
+                        const restType = getRestTypeOfTupleType(t);
+                        if (restType && isNumericLiteralName(name) && +name >= 0) {
+                            return restType;
+                        }
+                    }
+                }
+                return undefined;
             }, /*noReductions*/ true);
         }
 

From d869e56d3337c3c76bdd619b22bab56fa2f3a36a Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Mon, 25 Jun 2018 10:45:38 -1000
Subject: [PATCH 35/37] Add tests

---
 .../types/rest/genericRestParameters2.ts      | 83 +++++++++++++++++++
 .../types/tuple/optionalTupleElements1.ts     | 20 +----
 .../types/tuple/restTupleElements1.ts         | 71 ++++++++++++++++
 3 files changed, 156 insertions(+), 18 deletions(-)
 create mode 100644 tests/cases/conformance/types/rest/genericRestParameters2.ts
 create mode 100644 tests/cases/conformance/types/tuple/restTupleElements1.ts

diff --git a/tests/cases/conformance/types/rest/genericRestParameters2.ts b/tests/cases/conformance/types/rest/genericRestParameters2.ts
new file mode 100644
index 0000000000000..1dc0d231dd2d6
--- /dev/null
+++ b/tests/cases/conformance/types/rest/genericRestParameters2.ts
@@ -0,0 +1,83 @@
+// @strict: true
+// @declaration: true
+
+declare const t1: [number, string, ...boolean[]];
+declare const t2: [string, ...boolean[]];
+declare const t3: [...boolean[]];
+declare const t4: [];
+
+declare let f00: (...x: [number, string, boolean]) => void;
+declare let f01: (a: number, ...x: [string, boolean]) => void;
+declare let f02: (a: number, b: string, ...x: [boolean]) => void;
+declare let f03: (a: number, b: string, c: boolean) => void;
+declare let f04: (a: number, b: string, c: boolean, ...x: []) => void;
+
+declare let f10: (...x: [number, string, ...boolean[]]) => void;
+declare let f11: (a: number, ...x: [string, ...boolean[]]) => void;
+declare let f12: (a: number, b: string, ...x: [...boolean[]]) => void;
+declare let f13: (a: number, b: string, ...c: boolean[]) => void;
+
+declare const ns: [number, string];
+declare const sn: [string, number];
+
+f10(42, "hello");
+f10(42, "hello", true);
+f10(42, "hello", true, false);
+f10(t1[0], t1[1], t1[2], t1[3]);
+f10(...t1);
+f10(42, ...t2);
+f10(42, "hello", ...t3);
+f10(42, "hello", true, ...t4);
+f10(42, "hello", true, ...t4, false, ...t3);
+
+f11(42, "hello");
+f11(42, "hello", true);
+f11(42, "hello", true, false);
+f11(t1[0], t1[1], t1[2], t1[3]);
+f11(...t1);
+f11(42, ...t2);
+f11(42, "hello", ...t3);
+f11(42, "hello", true, ...t4);
+f11(42, "hello", true, ...t4, false, ...t3);
+
+f12(42, "hello");
+f12(42, "hello", true);
+f12(42, "hello", true, false);
+f12(t1[0], t1[1], t1[2], t1[3]);
+f12(...t1);
+f12(42, ...t2);
+f12(42, "hello", ...t3);
+f12(42, "hello", true, ...t4);
+f12(42, "hello", true, ...t4, false, ...t3);
+
+f13(42, "hello");
+f13(42, "hello", true);
+f13(42, "hello", true, false);
+f13(t1[0], t1[1], t1[2], t1[3]);
+f13(...t1);
+f13(42, ...t2);
+f13(42, "hello", ...t3);
+f13(42, "hello", true, ...t4);
+f13(42, "hello", true, ...t4, false, ...t3);
+
+declare const f20: <T extends unknown[]>(...args: T) => T;
+
+f20(...t1);
+f20(42, ...t2);
+f20(42, "hello", ...t3);
+f20(42, "hello", ...t2, true);
+
+type Parameters<T extends Function> = T extends ((...args: infer U) => any) | (new(...args: infer U) => any) ? U : any[];
+
+type T01 = Parameters<(x: number, y: string, ...z: boolean[]) => void>;
+type T02 = Parameters<(...args: [number, string, ...boolean[]]) => void>;
+type T03 = Parameters<new (x: number, y: string, ...z: boolean[]) => void>;
+type T04 = Parameters<new (...args: [number, string, ...boolean[]]) => void>;
+type T05<T extends any[]> = Parameters<(x: string, ...args: T) => void>;
+type T06 = T05<[number, ...boolean[]]>;
+
+type P1<T extends Function> = T extends (head: infer A, ...tail: infer B) => any ? { head: A, tail: B } : any[];
+
+type T10 = P1<(x: number, y: string, ...z: boolean[]) => void>;
+type T11 = P1<(...z: number[]) => void>;
+type T12 = P1<(x: number, y: number) => void>;
diff --git a/tests/cases/conformance/types/tuple/optionalTupleElements1.ts b/tests/cases/conformance/types/tuple/optionalTupleElements1.ts
index 60570c402a10b..a2a343af737c2 100644
--- a/tests/cases/conformance/types/tuple/optionalTupleElements1.ts
+++ b/tests/cases/conformance/types/tuple/optionalTupleElements1.ts
@@ -11,6 +11,8 @@ type L2 = T2["length"];
 type L3 = T3["length"];
 type L4 = T4["length"];
 
+type T5 = [number, string?, boolean];  // Error
+
 function f1(t1: T1, t2: T2, t3: T3, t4: T4) {
     t1 = t1;
     t1 = t2;  // Error
@@ -30,26 +32,9 @@ function f1(t1: T1, t2: T2, t3: T3, t4: T4) {
     t4 = t4;
 }
 
-type T5 = [number, string?, boolean];
-type L5 = T5["length"];
-
-function f2(t1: T1, t2: T2, t3: T3, t4: T4, t5: T5) {
-    t1 = t5;  // Error
-    t2 = t5;  // Error
-    t3 = t5;
-    t4 = t5;
-    t5 = t5;
-    t5 = t1;
-    t5 = t2;  // Error
-    t5 = t3;  // Error
-    t5 = t4;  // Error
-    t5 = t5;
-}
-
 let t2: T2;
 let t3: T3;
 let t4: T4;
-let t5: T5;
 
 t2 = [42, "hello"];
 t3 = [42, "hello"];
@@ -60,4 +45,3 @@ t4 = [42,,true];
 t4 = [,"hello", true];
 t4 = [,,true];
 t4 = [];
-t5 = [42,,true];
diff --git a/tests/cases/conformance/types/tuple/restTupleElements1.ts b/tests/cases/conformance/types/tuple/restTupleElements1.ts
new file mode 100644
index 0000000000000..040ce66003a96
--- /dev/null
+++ b/tests/cases/conformance/types/tuple/restTupleElements1.ts
@@ -0,0 +1,71 @@
+// @strict: true
+// @declaration: true
+
+type T00 = [string?];
+type T01 = [string, string?];
+type T02 = [string?, string];  // Error
+type T03 = [...string[]];
+type T04 = [...[...string[]]];
+type T05 = [...[...[...string[]]]];
+type T06 = [string, ...string[]];
+type T07 = [...string[], string];  // Error
+type T08 = [...string];  // Error
+type T09 = [...string?];  // Error
+type T10 = [string, ...[...string[]]];
+type T11 = [string, ...[...[...string[]]]];
+
+type T15 = [boolean, number, ...string[]];
+type L15 = T15["length"];  // number
+
+declare function assign<T, S extends T>(): void;
+
+assign<number[], [...number[]]>();
+assign<number[], [number, ...number[]]>();
+assign<[...number[]], number[]>();
+
+assign<[number, ...number[]], number[]>();  // Error
+assign<[number, ...number[]], []>();  // Error
+assign<[number, ...number[]], [number]>();
+assign<[number, ...number[]], [number, number]>();
+assign<[number, ...number[]], [number, number, ...number[]]>();
+
+assign<[number], [...number[]]>();  // Error
+assign<[number], [number, ...number[]]>();  // Error
+
+assign<[number, ...number[]], [number, ...string[]]>();  // Error
+assign<[number, ...number[]], [string, ...number[]]>();  // Error
+assign<[number, ...number[]], [number, number, string]>();  // Error
+assign<[number, ...number[]], [number, number, number, string]>();  // Error
+
+type T20 = [number, string, ...boolean[]];
+
+type T21 = T20[0];
+type T22 = T20[0 | 1];
+type T23 = T20[0 | 1 | 2];
+type T24 = T20[0 | 1 | 2 | 3];
+type T25 = T20[1 | 2 | 3];
+type T26 = T20[2 | 3];
+type T27 = T20[3];
+type T28 = T20[number];
+
+declare const t: T20;
+declare const x: number;
+
+let e0 = t[0];  // number
+let e1 = t[1];  // string
+let e2 = t[2];  // boolean
+let e3 = t[3];  // boolean
+let ex = t[x];  // number | string | boolean
+
+declare function f0<T, U>(x: [T, ...U[]]): [T, U];
+
+f0([]);  // Error
+f0([1]);
+f0([1, 2, 3]);
+f0([1, "hello", true]);
+
+declare function f1(a: [(x: number) => number, ...((x: string) => number)[]]): void;
+declare function f2(...a: [(x: number) => number, ...((x: string) => number)[]]): void;
+
+f1([x => x * 2, x => x.length, x => x.charCodeAt(0)]);
+f2(x => x * 2, x => x.length, x => x.charCodeAt(0));

From 5ef7e9ff34e7b27d9dd1cef370dd02e17327a624 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Mon, 25 Jun 2018 10:45:48 -1000
Subject: [PATCH 36/37] Accept new baselines

---
 .../reference/genericRestParameters2.js       | 158 ++++++
 .../reference/genericRestParameters2.symbols  | 326 ++++++++++++
 .../reference/genericRestParameters2.types    | 500 ++++++++++++++++++
 .../optionalTupleElements1.errors.txt         |  79 +--
 .../reference/optionalTupleElements1.js       |  39 +-
 .../reference/optionalTupleElements1.symbols  | 169 ++----
 .../reference/optionalTupleElements1.types    |  86 +--
 .../reference/restTupleElements1.errors.txt   | 138 +++++
 .../baselines/reference/restTupleElements1.js | 135 +++++
 .../reference/restTupleElements1.symbols      | 217 ++++++++
 .../reference/restTupleElements1.types        | 270 ++++++++++
 11 files changed, 1814 insertions(+), 303 deletions(-)
 create mode 100644 tests/baselines/reference/genericRestParameters2.js
 create mode 100644 tests/baselines/reference/genericRestParameters2.symbols
 create mode 100644 tests/baselines/reference/genericRestParameters2.types
 create mode 100644 tests/baselines/reference/restTupleElements1.errors.txt
 create mode 100644 tests/baselines/reference/restTupleElements1.js
 create mode 100644 tests/baselines/reference/restTupleElements1.symbols
 create mode 100644 tests/baselines/reference/restTupleElements1.types

diff --git a/tests/baselines/reference/genericRestParameters2.js b/tests/baselines/reference/genericRestParameters2.js
new file mode 100644
index 0000000000000..143a4a62f5253
--- /dev/null
+++ b/tests/baselines/reference/genericRestParameters2.js
@@ -0,0 +1,158 @@
+//// [genericRestParameters2.ts]
+declare const t1: [number, string, ...boolean[]];
+declare const t2: [string, ...boolean[]];
+declare const t3: [...boolean[]];
+declare const t4: [];
+
+declare let f00: (...x: [number, string, boolean]) => void;
+declare let f01: (a: number, ...x: [string, boolean]) => void;
+declare let f02: (a: number, b: string, ...x: [boolean]) => void;
+declare let f03: (a: number, b: string, c: boolean) => void;
+declare let f04: (a: number, b: string, c: boolean, ...x: []) => void;
+
+declare let f10: (...x: [number, string, ...boolean[]]) => void;
+declare let f11: (a: number, ...x: [string, ...boolean[]]) => void;
+declare let f12: (a: number, b: string, ...x: [...boolean[]]) => void;
+declare let f13: (a: number, b: string, ...c: boolean[]) => void;
+
+declare const ns: [number, string];
+declare const sn: [string, number];
+
+f10(42, "hello");
+f10(42, "hello", true);
+f10(42, "hello", true, false);
+f10(t1[0], t1[1], t1[2], t1[3]);
+f10(...t1);
+f10(42, ...t2);
+f10(42, "hello", ...t3);
+f10(42, "hello", true, ...t4);
+f10(42, "hello", true, ...t4, false, ...t3);
+
+f11(42, "hello");
+f11(42, "hello", true);
+f11(42, "hello", true, false);
+f11(t1[0], t1[1], t1[2], t1[3]);
+f11(...t1);
+f11(42, ...t2);
+f11(42, "hello", ...t3);
+f11(42, "hello", true, ...t4);
+f11(42, "hello", true, ...t4, false, ...t3);
+
+f12(42, "hello");
+f12(42, "hello", true);
+f12(42, "hello", true, false);
+f12(t1[0], t1[1], t1[2], t1[3]);
+f12(...t1);
+f12(42, ...t2);
+f12(42, "hello", ...t3);
+f12(42, "hello", true, ...t4);
+f12(42, "hello", true, ...t4, false, ...t3);
+
+f13(42, "hello");
+f13(42, "hello", true);
+f13(42, "hello", true, false);
+f13(t1[0], t1[1], t1[2], t1[3]);
+f13(...t1);
+f13(42, ...t2);
+f13(42, "hello", ...t3);
+f13(42, "hello", true, ...t4);
+f13(42, "hello", true, ...t4, false, ...t3);
+
+declare const f20: <T extends unknown[]>(...args: T) => T;
+
+f20(...t1);
+f20(42, ...t2);
+f20(42, "hello", ...t3);
+f20(42, "hello", ...t2, true);
+
+type Parameters<T extends Function> = T extends ((...args: infer U) => any) | (new(...args: infer U) => any) ? U : any[];
+
+type T01 = Parameters<(x: number, y: string, ...z: boolean[]) => void>;
+type T02 = Parameters<(...args: [number, string, ...boolean[]]) => void>;
+type T03 = Parameters<new (x: number, y: string, ...z: boolean[]) => void>;
+type T04 = Parameters<new (...args: [number, string, ...boolean[]]) => void>;
+type T05<T extends any[]> = Parameters<(x: string, ...args: T) => void>;
+type T06 = T05<[number, ...boolean[]]>;
+
+type P1<T extends Function> = T extends (head: infer A, ...tail: infer B) => any ? { head: A, tail: B } : any[];
+
+type T10 = P1<(x: number, y: string, ...z: boolean[]) => void>;
+type T11 = P1<(...z: number[]) => void>;
+type T12 = P1<(x: number, y: number) => void>;
+
+
+//// [genericRestParameters2.js]
+"use strict";
+f10(42, "hello");
+f10(42, "hello", true);
+f10(42, "hello", true, false);
+f10(t1[0], t1[1], t1[2], t1[3]);
+f10.apply(void 0, t1);
+f10.apply(void 0, [42].concat(t2));
+f10.apply(void 0, [42, "hello"].concat(t3));
+f10.apply(void 0, [42, "hello", true].concat(t4));
+f10.apply(void 0, [42, "hello", true].concat(t4, [false], t3));
+f11(42, "hello");
+f11(42, "hello", true);
+f11(42, "hello", true, false);
+f11(t1[0], t1[1], t1[2], t1[3]);
+f11.apply(void 0, t1);
+f11.apply(void 0, [42].concat(t2));
+f11.apply(void 0, [42, "hello"].concat(t3));
+f11.apply(void 0, [42, "hello", true].concat(t4));
+f11.apply(void 0, [42, "hello", true].concat(t4, [false], t3));
+f12(42, "hello");
+f12(42, "hello", true);
+f12(42, "hello", true, false);
+f12(t1[0], t1[1], t1[2], t1[3]);
+f12.apply(void 0, t1);
+f12.apply(void 0, [42].concat(t2));
+f12.apply(void 0, [42, "hello"].concat(t3));
+f12.apply(void 0, [42, "hello", true].concat(t4));
+f12.apply(void 0, [42, "hello", true].concat(t4, [false], t3));
+f13(42, "hello");
+f13(42, "hello", true);
+f13(42, "hello", true, false);
+f13(t1[0], t1[1], t1[2], t1[3]);
+f13.apply(void 0, t1);
+f13.apply(void 0, [42].concat(t2));
+f13.apply(void 0, [42, "hello"].concat(t3));
+f13.apply(void 0, [42, "hello", true].concat(t4));
+f13.apply(void 0, [42, "hello", true].concat(t4, [false], t3));
+f20.apply(void 0, t1);
+f20.apply(void 0, [42].concat(t2));
+f20.apply(void 0, [42, "hello"].concat(t3));
+f20.apply(void 0, [42, "hello"].concat(t2, [true]));
+
+
+//// [genericRestParameters2.d.ts]
+declare const t1: [number, string, ...boolean[]];
+declare const t2: [string, ...boolean[]];
+declare const t3: [...boolean[]];
+declare const t4: [];
+declare let f00: (...x: [number, string, boolean]) => void;
+declare let f01: (a: number, ...x: [string, boolean]) => void;
+declare let f02: (a: number, b: string, ...x: [boolean]) => void;
+declare let f03: (a: number, b: string, c: boolean) => void;
+declare let f04: (a: number, b: string, c: boolean, ...x: []) => void;
+declare let f10: (...x: [number, string, ...boolean[]]) => void;
+declare let f11: (a: number, ...x: [string, ...boolean[]]) => void;
+declare let f12: (a: number, b: string, ...x: [...boolean[]]) => void;
+declare let f13: (a: number, b: string, ...c: boolean[]) => void;
+declare const ns: [number, string];
+declare const sn: [string, number];
+declare const f20: <T extends unknown[]>(...args: T) => T;
+declare type Parameters<T extends Function> = T extends ((...args: infer U) => any) | (new (...args: infer U) => any) ? U : any[];
+declare type T01 = Parameters<(x: number, y: string, ...z: boolean[]) => void>;
+declare type T02 = Parameters<(...args: [number, string, ...boolean[]]) => void>;
+declare type T03 = Parameters<new (x: number, y: string, ...z: boolean[]) => void>;
+declare type T04 = Parameters<new (...args: [number, string, ...boolean[]]) => void>;
+declare type T05<T extends any[]> = Parameters<(x: string, ...args: T) => void>;
+declare type T06 = T05<[number, ...boolean[]]>;
+declare type P1<T extends Function> = T extends (head: infer A, ...tail: infer B) => any ? {
+    head: A;
+    tail: B;
+} : any[];
+declare type T10 = P1<(x: number, y: string, ...z: boolean[]) => void>;
+declare type T11 = P1<(...z: number[]) => void>;
+declare type T12 = P1<(x: number, y: number) => void>;
diff --git a/tests/baselines/reference/genericRestParameters2.symbols b/tests/baselines/reference/genericRestParameters2.symbols
new file mode 100644
index 0000000000000..164d08d132e28
--- /dev/null
+++ b/tests/baselines/reference/genericRestParameters2.symbols
@@ -0,0 +1,326 @@
+=== tests/cases/conformance/types/rest/genericRestParameters2.ts ===
+declare const t1: [number, string, ...boolean[]];
+>t1 : Symbol(t1, Decl(genericRestParameters2.ts, 0, 13))
+
+declare const t2: [string, ...boolean[]];
+>t2 : Symbol(t2, Decl(genericRestParameters2.ts, 1, 13))
+
+declare const t3: [...boolean[]];
+>t3 : Symbol(t3, Decl(genericRestParameters2.ts, 2, 13))
+
+declare const t4: [];
+>t4 : Symbol(t4, Decl(genericRestParameters2.ts, 3, 13))
+
+declare let f00: (...x: [number, string, boolean]) => void;
+>f00 : Symbol(f00, Decl(genericRestParameters2.ts, 5, 11))
+>x : Symbol(x, Decl(genericRestParameters2.ts, 5, 18))
+
+declare let f01: (a: number, ...x: [string, boolean]) => void;
+>f01 : Symbol(f01, Decl(genericRestParameters2.ts, 6, 11))
+>a : Symbol(a, Decl(genericRestParameters2.ts, 6, 18))
+>x : Symbol(x, Decl(genericRestParameters2.ts, 6, 28))
+
+declare let f02: (a: number, b: string, ...x: [boolean]) => void;
+>f02 : Symbol(f02, Decl(genericRestParameters2.ts, 7, 11))
+>a : Symbol(a, Decl(genericRestParameters2.ts, 7, 18))
+>b : Symbol(b, Decl(genericRestParameters2.ts, 7, 28))
+>x : Symbol(x, Decl(genericRestParameters2.ts, 7, 39))
+
+declare let f03: (a: number, b: string, c: boolean) => void;
+>f03 : Symbol(f03, Decl(genericRestParameters2.ts, 8, 11))
+>a : Symbol(a, Decl(genericRestParameters2.ts, 8, 18))
+>b : Symbol(b, Decl(genericRestParameters2.ts, 8, 28))
+>c : Symbol(c, Decl(genericRestParameters2.ts, 8, 39))
+
+declare let f04: (a: number, b: string, c: boolean, ...x: []) => void;
+>f04 : Symbol(f04, Decl(genericRestParameters2.ts, 9, 11))
+>a : Symbol(a, Decl(genericRestParameters2.ts, 9, 18))
+>b : Symbol(b, Decl(genericRestParameters2.ts, 9, 28))
+>c : Symbol(c, Decl(genericRestParameters2.ts, 9, 39))
+>x : Symbol(x, Decl(genericRestParameters2.ts, 9, 51))
+
+declare let f10: (...x: [number, string, ...boolean[]]) => void;
+>f10 : Symbol(f10, Decl(genericRestParameters2.ts, 11, 11))
+>x : Symbol(x, Decl(genericRestParameters2.ts, 11, 18))
+
+declare let f11: (a: number, ...x: [string, ...boolean[]]) => void;
+>f11 : Symbol(f11, Decl(genericRestParameters2.ts, 12, 11))
+>a : Symbol(a, Decl(genericRestParameters2.ts, 12, 18))
+>x : Symbol(x, Decl(genericRestParameters2.ts, 12, 28))
+
+declare let f12: (a: number, b: string, ...x: [...boolean[]]) => void;
+>f12 : Symbol(f12, Decl(genericRestParameters2.ts, 13, 11))
+>a : Symbol(a, Decl(genericRestParameters2.ts, 13, 18))
+>b : Symbol(b, Decl(genericRestParameters2.ts, 13, 28))
+>x : Symbol(x, Decl(genericRestParameters2.ts, 13, 39))
+
+declare let f13: (a: number, b: string, ...c: boolean[]) => void;
+>f13 : Symbol(f13, Decl(genericRestParameters2.ts, 14, 11))
+>a : Symbol(a, Decl(genericRestParameters2.ts, 14, 18))
+>b : Symbol(b, Decl(genericRestParameters2.ts, 14, 28))
+>c : Symbol(c, Decl(genericRestParameters2.ts, 14, 39))
+
+declare const ns: [number, string];
+>ns : Symbol(ns, Decl(genericRestParameters2.ts, 16, 13))
+
+declare const sn: [string, number];
+>sn : Symbol(sn, Decl(genericRestParameters2.ts, 17, 13))
+
+f10(42, "hello");
+>f10 : Symbol(f10, Decl(genericRestParameters2.ts, 11, 11))
+
+f10(42, "hello", true);
+>f10 : Symbol(f10, Decl(genericRestParameters2.ts, 11, 11))
+
+f10(42, "hello", true, false);
+>f10 : Symbol(f10, Decl(genericRestParameters2.ts, 11, 11))
+
+f10(t1[0], t1[1], t1[2], t1[3]);
+>f10 : Symbol(f10, Decl(genericRestParameters2.ts, 11, 11))
+>t1 : Symbol(t1, Decl(genericRestParameters2.ts, 0, 13))
+>0 : Symbol(0)
+>t1 : Symbol(t1, Decl(genericRestParameters2.ts, 0, 13))
+>1 : Symbol(1)
+>t1 : Symbol(t1, Decl(genericRestParameters2.ts, 0, 13))
+>t1 : Symbol(t1, Decl(genericRestParameters2.ts, 0, 13))
+
+f10(...t1);
+>f10 : Symbol(f10, Decl(genericRestParameters2.ts, 11, 11))
+>t1 : Symbol(t1, Decl(genericRestParameters2.ts, 0, 13))
+
+f10(42, ...t2);
+>f10 : Symbol(f10, Decl(genericRestParameters2.ts, 11, 11))
+>t2 : Symbol(t2, Decl(genericRestParameters2.ts, 1, 13))
+
+f10(42, "hello", ...t3);
+>f10 : Symbol(f10, Decl(genericRestParameters2.ts, 11, 11))
+>t3 : Symbol(t3, Decl(genericRestParameters2.ts, 2, 13))
+
+f10(42, "hello", true, ...t4);
+>f10 : Symbol(f10, Decl(genericRestParameters2.ts, 11, 11))
+>t4 : Symbol(t4, Decl(genericRestParameters2.ts, 3, 13))
+
+f10(42, "hello", true, ...t4, false, ...t3);
+>f10 : Symbol(f10, Decl(genericRestParameters2.ts, 11, 11))
+>t4 : Symbol(t4, Decl(genericRestParameters2.ts, 3, 13))
+>t3 : Symbol(t3, Decl(genericRestParameters2.ts, 2, 13))
+
+f11(42, "hello");
+>f11 : Symbol(f11, Decl(genericRestParameters2.ts, 12, 11))
+
+f11(42, "hello", true);
+>f11 : Symbol(f11, Decl(genericRestParameters2.ts, 12, 11))
+
+f11(42, "hello", true, false);
+>f11 : Symbol(f11, Decl(genericRestParameters2.ts, 12, 11))
+
+f11(t1[0], t1[1], t1[2], t1[3]);
+>f11 : Symbol(f11, Decl(genericRestParameters2.ts, 12, 11))
+>t1 : Symbol(t1, Decl(genericRestParameters2.ts, 0, 13))
+>0 : Symbol(0)
+>t1 : Symbol(t1, Decl(genericRestParameters2.ts, 0, 13))
+>1 : Symbol(1)
+>t1 : Symbol(t1, Decl(genericRestParameters2.ts, 0, 13))
+>t1 : Symbol(t1, Decl(genericRestParameters2.ts, 0, 13))
+
+f11(...t1);
+>f11 : Symbol(f11, Decl(genericRestParameters2.ts, 12, 11))
+>t1 : Symbol(t1, Decl(genericRestParameters2.ts, 0, 13))
+
+f11(42, ...t2);
+>f11 : Symbol(f11, Decl(genericRestParameters2.ts, 12, 11))
+>t2 : Symbol(t2, Decl(genericRestParameters2.ts, 1, 13))
+
+f11(42, "hello", ...t3);
+>f11 : Symbol(f11, Decl(genericRestParameters2.ts, 12, 11))
+>t3 : Symbol(t3, Decl(genericRestParameters2.ts, 2, 13))
+
+f11(42, "hello", true, ...t4);
+>f11 : Symbol(f11, Decl(genericRestParameters2.ts, 12, 11))
+>t4 : Symbol(t4, Decl(genericRestParameters2.ts, 3, 13))
+
+f11(42, "hello", true, ...t4, false, ...t3);
+>f11 : Symbol(f11, Decl(genericRestParameters2.ts, 12, 11))
+>t4 : Symbol(t4, Decl(genericRestParameters2.ts, 3, 13))
+>t3 : Symbol(t3, Decl(genericRestParameters2.ts, 2, 13))
+
+f12(42, "hello");
+>f12 : Symbol(f12, Decl(genericRestParameters2.ts, 13, 11))
+
+f12(42, "hello", true);
+>f12 : Symbol(f12, Decl(genericRestParameters2.ts, 13, 11))
+
+f12(42, "hello", true, false);
+>f12 : Symbol(f12, Decl(genericRestParameters2.ts, 13, 11))
+
+f12(t1[0], t1[1], t1[2], t1[3]);
+>f12 : Symbol(f12, Decl(genericRestParameters2.ts, 13, 11))
+>t1 : Symbol(t1, Decl(genericRestParameters2.ts, 0, 13))
+>0 : Symbol(0)
+>t1 : Symbol(t1, Decl(genericRestParameters2.ts, 0, 13))
+>1 : Symbol(1)
+>t1 : Symbol(t1, Decl(genericRestParameters2.ts, 0, 13))
+>t1 : Symbol(t1, Decl(genericRestParameters2.ts, 0, 13))
+
+f12(...t1);
+>f12 : Symbol(f12, Decl(genericRestParameters2.ts, 13, 11))
+>t1 : Symbol(t1, Decl(genericRestParameters2.ts, 0, 13))
+
+f12(42, ...t2);
+>f12 : Symbol(f12, Decl(genericRestParameters2.ts, 13, 11))
+>t2 : Symbol(t2, Decl(genericRestParameters2.ts, 1, 13))
+
+f12(42, "hello", ...t3);
+>f12 : Symbol(f12, Decl(genericRestParameters2.ts, 13, 11))
+>t3 : Symbol(t3, Decl(genericRestParameters2.ts, 2, 13))
+
+f12(42, "hello", true, ...t4);
+>f12 : Symbol(f12, Decl(genericRestParameters2.ts, 13, 11))
+>t4 : Symbol(t4, Decl(genericRestParameters2.ts, 3, 13))
+
+f12(42, "hello", true, ...t4, false, ...t3);
+>f12 : Symbol(f12, Decl(genericRestParameters2.ts, 13, 11))
+>t4 : Symbol(t4, Decl(genericRestParameters2.ts, 3, 13))
+>t3 : Symbol(t3, Decl(genericRestParameters2.ts, 2, 13))
+
+f13(42, "hello");
+>f13 : Symbol(f13, Decl(genericRestParameters2.ts, 14, 11))
+
+f13(42, "hello", true);
+>f13 : Symbol(f13, Decl(genericRestParameters2.ts, 14, 11))
+
+f13(42, "hello", true, false);
+>f13 : Symbol(f13, Decl(genericRestParameters2.ts, 14, 11))
+
+f13(t1[0], t1[1], t1[2], t1[3]);
+>f13 : Symbol(f13, Decl(genericRestParameters2.ts, 14, 11))
+>t1 : Symbol(t1, Decl(genericRestParameters2.ts, 0, 13))
+>0 : Symbol(0)
+>t1 : Symbol(t1, Decl(genericRestParameters2.ts, 0, 13))
+>1 : Symbol(1)
+>t1 : Symbol(t1, Decl(genericRestParameters2.ts, 0, 13))
+>t1 : Symbol(t1, Decl(genericRestParameters2.ts, 0, 13))
+
+f13(...t1);
+>f13 : Symbol(f13, Decl(genericRestParameters2.ts, 14, 11))
+>t1 : Symbol(t1, Decl(genericRestParameters2.ts, 0, 13))
+
+f13(42, ...t2);
+>f13 : Symbol(f13, Decl(genericRestParameters2.ts, 14, 11))
+>t2 : Symbol(t2, Decl(genericRestParameters2.ts, 1, 13))
+
+f13(42, "hello", ...t3);
+>f13 : Symbol(f13, Decl(genericRestParameters2.ts, 14, 11))
+>t3 : Symbol(t3, Decl(genericRestParameters2.ts, 2, 13))
+
+f13(42, "hello", true, ...t4);
+>f13 : Symbol(f13, Decl(genericRestParameters2.ts, 14, 11))
+>t4 : Symbol(t4, Decl(genericRestParameters2.ts, 3, 13))
+
+f13(42, "hello", true, ...t4, false, ...t3);
+>f13 : Symbol(f13, Decl(genericRestParameters2.ts, 14, 11))
+>t4 : Symbol(t4, Decl(genericRestParameters2.ts, 3, 13))
+>t3 : Symbol(t3, Decl(genericRestParameters2.ts, 2, 13))
+
+declare const f20: <T extends unknown[]>(...args: T) => T;
+>f20 : Symbol(f20, Decl(genericRestParameters2.ts, 59, 13))
+>T : Symbol(T, Decl(genericRestParameters2.ts, 59, 20))
+>args : Symbol(args, Decl(genericRestParameters2.ts, 59, 41))
+>T : Symbol(T, Decl(genericRestParameters2.ts, 59, 20))
+>T : Symbol(T, Decl(genericRestParameters2.ts, 59, 20))
+
+f20(...t1);
+>f20 : Symbol(f20, Decl(genericRestParameters2.ts, 59, 13))
+>t1 : Symbol(t1, Decl(genericRestParameters2.ts, 0, 13))
+
+f20(42, ...t2);
+>f20 : Symbol(f20, Decl(genericRestParameters2.ts, 59, 13))
+>t2 : Symbol(t2, Decl(genericRestParameters2.ts, 1, 13))
+
+f20(42, "hello", ...t3);
+>f20 : Symbol(f20, Decl(genericRestParameters2.ts, 59, 13))
+>t3 : Symbol(t3, Decl(genericRestParameters2.ts, 2, 13))
+
+f20(42, "hello", ...t2, true);
+>f20 : Symbol(f20, Decl(genericRestParameters2.ts, 59, 13))
+>t2 : Symbol(t2, Decl(genericRestParameters2.ts, 1, 13))
+
+type Parameters<T extends Function> = T extends ((...args: infer U) => any) | (new(...args: infer U) => any) ? U : any[];
+>Parameters : Symbol(Parameters, Decl(genericRestParameters2.ts, 64, 30))
+>T : Symbol(T, Decl(genericRestParameters2.ts, 66, 16))
+>Function : Symbol(Function, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --))
+>T : Symbol(T, Decl(genericRestParameters2.ts, 66, 16))
+>args : Symbol(args, Decl(genericRestParameters2.ts, 66, 50))
+>U : Symbol(U, Decl(genericRestParameters2.ts, 66, 64), Decl(genericRestParameters2.ts, 66, 97))
+>args : Symbol(args, Decl(genericRestParameters2.ts, 66, 83))
+>U : Symbol(U, Decl(genericRestParameters2.ts, 66, 64), Decl(genericRestParameters2.ts, 66, 97))
+>U : Symbol(U, Decl(genericRestParameters2.ts, 66, 64), Decl(genericRestParameters2.ts, 66, 97))
+
+type T01 = Parameters<(x: number, y: string, ...z: boolean[]) => void>;
+>T01 : Symbol(T01, Decl(genericRestParameters2.ts, 66, 121))
+>Parameters : Symbol(Parameters, Decl(genericRestParameters2.ts, 64, 30))
+>x : Symbol(x, Decl(genericRestParameters2.ts, 68, 23))
+>y : Symbol(y, Decl(genericRestParameters2.ts, 68, 33))
+>z : Symbol(z, Decl(genericRestParameters2.ts, 68, 44))
+
+type T02 = Parameters<(...args: [number, string, ...boolean[]]) => void>;
+>T02 : Symbol(T02, Decl(genericRestParameters2.ts, 68, 71))
+>Parameters : Symbol(Parameters, Decl(genericRestParameters2.ts, 64, 30))
+>args : Symbol(args, Decl(genericRestParameters2.ts, 69, 23))
+
+type T03 = Parameters<new (x: number, y: string, ...z: boolean[]) => void>;
+>T03 : Symbol(T03, Decl(genericRestParameters2.ts, 69, 73))
+>Parameters : Symbol(Parameters, Decl(genericRestParameters2.ts, 64, 30))
+>x : Symbol(x, Decl(genericRestParameters2.ts, 70, 27))
+>y : Symbol(y, Decl(genericRestParameters2.ts, 70, 37))
+>z : Symbol(z, Decl(genericRestParameters2.ts, 70, 48))
+
+type T04 = Parameters<new (...args: [number, string, ...boolean[]]) => void>;
+>T04 : Symbol(T04, Decl(genericRestParameters2.ts, 70, 75))
+>Parameters : Symbol(Parameters, Decl(genericRestParameters2.ts, 64, 30))
+>args : Symbol(args, Decl(genericRestParameters2.ts, 71, 27))
+
+type T05<T extends any[]> = Parameters<(x: string, ...args: T) => void>;
+>T05 : Symbol(T05, Decl(genericRestParameters2.ts, 71, 77))
+>T : Symbol(T, Decl(genericRestParameters2.ts, 72, 9))
+>Parameters : Symbol(Parameters, Decl(genericRestParameters2.ts, 64, 30))
+>x : Symbol(x, Decl(genericRestParameters2.ts, 72, 40))
+>args : Symbol(args, Decl(genericRestParameters2.ts, 72, 50))
+>T : Symbol(T, Decl(genericRestParameters2.ts, 72, 9))
+
+type T06 = T05<[number, ...boolean[]]>;
+>T06 : Symbol(T06, Decl(genericRestParameters2.ts, 72, 72))
+>T05 : Symbol(T05, Decl(genericRestParameters2.ts, 71, 77))
+
+type P1<T extends Function> = T extends (head: infer A, ...tail: infer B) => any ? { head: A, tail: B } : any[];
+>P1 : Symbol(P1, Decl(genericRestParameters2.ts, 73, 39))
+>T : Symbol(T, Decl(genericRestParameters2.ts, 75, 8))
+>Function : Symbol(Function, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --))
+>T : Symbol(T, Decl(genericRestParameters2.ts, 75, 8))
+>head : Symbol(head, Decl(genericRestParameters2.ts, 75, 41))
+>A : Symbol(A, Decl(genericRestParameters2.ts, 75, 52))
+>tail : Symbol(tail, Decl(genericRestParameters2.ts, 75, 55))
+>B : Symbol(B, Decl(genericRestParameters2.ts, 75, 70))
+>head : Symbol(head, Decl(genericRestParameters2.ts, 75, 84))
+>A : Symbol(A, Decl(genericRestParameters2.ts, 75, 52))
+>tail : Symbol(tail, Decl(genericRestParameters2.ts, 75, 93))
+>B : Symbol(B, Decl(genericRestParameters2.ts, 75, 70))
+
+type T10 = P1<(x: number, y: string, ...z: boolean[]) => void>;
+>T10 : Symbol(T10, Decl(genericRestParameters2.ts, 75, 112))
+>P1 : Symbol(P1, Decl(genericRestParameters2.ts, 73, 39))
+>x : Symbol(x, Decl(genericRestParameters2.ts, 77, 15))
+>y : Symbol(y, Decl(genericRestParameters2.ts, 77, 25))
+>z : Symbol(z, Decl(genericRestParameters2.ts, 77, 36))
+
+type T11 = P1<(...z: number[]) => void>;
+>T11 : Symbol(T11, Decl(genericRestParameters2.ts, 77, 63))
+>P1 : Symbol(P1, Decl(genericRestParameters2.ts, 73, 39))
+>z : Symbol(z, Decl(genericRestParameters2.ts, 78, 15))
+
+type T12 = P1<(x: number, y: number) => void>;
+>T12 : Symbol(T12, Decl(genericRestParameters2.ts, 78, 40))
+>P1 : Symbol(P1, Decl(genericRestParameters2.ts, 73, 39))
+>x : Symbol(x, Decl(genericRestParameters2.ts, 79, 15))
+>y : Symbol(y, Decl(genericRestParameters2.ts, 79, 25))
+
diff --git a/tests/baselines/reference/genericRestParameters2.types b/tests/baselines/reference/genericRestParameters2.types
new file mode 100644
index 0000000000000..4b7904ce1d524
--- /dev/null
+++ b/tests/baselines/reference/genericRestParameters2.types
@@ -0,0 +1,500 @@
+=== tests/cases/conformance/types/rest/genericRestParameters2.ts ===
+declare const t1: [number, string, ...boolean[]];
+>t1 : [number, string, ...boolean[]]
+
+declare const t2: [string, ...boolean[]];
+>t2 : [string, ...boolean[]]
+
+declare const t3: [...boolean[]];
+>t3 : boolean[]
+
+declare const t4: [];
+>t4 : []
+
+declare let f00: (...x: [number, string, boolean]) => void;
+>f00 : (x_0: number, x_1: string, x_2: boolean) => void
+>x : [number, string, boolean]
+
+declare let f01: (a: number, ...x: [string, boolean]) => void;
+>f01 : (a: number, x_0: string, x_1: boolean) => void
+>a : number
+>x : [string, boolean]
+
+declare let f02: (a: number, b: string, ...x: [boolean]) => void;
+>f02 : (a: number, b: string, x_0: boolean) => void
+>a : number
+>b : string
+>x : [boolean]
+
+declare let f03: (a: number, b: string, c: boolean) => void;
+>f03 : (a: number, b: string, c: boolean) => void
+>a : number
+>b : string
+>c : boolean
+
+declare let f04: (a: number, b: string, c: boolean, ...x: []) => void;
+>f04 : (a: number, b: string, c: boolean) => void
+>a : number
+>b : string
+>c : boolean
+>x : []
+
+declare let f10: (...x: [number, string, ...boolean[]]) => void;
+>f10 : (x_0: number, x_1: string, ...x_2: boolean[]) => void
+>x : [number, string, ...boolean[]]
+
+declare let f11: (a: number, ...x: [string, ...boolean[]]) => void;
+>f11 : (a: number, x_0: string, ...x_1: boolean[]) => void
+>a : number
+>x : [string, ...boolean[]]
+
+declare let f12: (a: number, b: string, ...x: [...boolean[]]) => void;
+>f12 : (a: number, b: string, ...x: boolean[]) => void
+>a : number
+>b : string
+>x : boolean[]
+
+declare let f13: (a: number, b: string, ...c: boolean[]) => void;
+>f13 : (a: number, b: string, ...c: boolean[]) => void
+>a : number
+>b : string
+>c : boolean[]
+
+declare const ns: [number, string];
+>ns : [number, string]
+
+declare const sn: [string, number];
+>sn : [string, number]
+
+f10(42, "hello");
+>f10(42, "hello") : void
+>f10 : (x_0: number, x_1: string, ...x_2: boolean[]) => void
+>42 : 42
+>"hello" : "hello"
+
+f10(42, "hello", true);
+>f10(42, "hello", true) : void
+>f10 : (x_0: number, x_1: string, ...x_2: boolean[]) => void
+>42 : 42
+>"hello" : "hello"
+>true : true
+
+f10(42, "hello", true, false);
+>f10(42, "hello", true, false) : void
+>f10 : (x_0: number, x_1: string, ...x_2: boolean[]) => void
+>42 : 42
+>"hello" : "hello"
+>true : true
+>false : false
+
+f10(t1[0], t1[1], t1[2], t1[3]);
+>f10(t1[0], t1[1], t1[2], t1[3]) : void
+>f10 : (x_0: number, x_1: string, ...x_2: boolean[]) => void
+>t1[0] : number
+>t1 : [number, string, ...boolean[]]
+>0 : 0
+>t1[1] : string
+>t1 : [number, string, ...boolean[]]
+>1 : 1
+>t1[2] : boolean
+>t1 : [number, string, ...boolean[]]
+>2 : 2
+>t1[3] : boolean
+>t1 : [number, string, ...boolean[]]
+>3 : 3
+
+f10(...t1);
+>f10(...t1) : void
+>f10 : (x_0: number, x_1: string, ...x_2: boolean[]) => void
+>...t1 : string | number | boolean
+>t1 : [number, string, ...boolean[]]
+
+f10(42, ...t2);
+>f10(42, ...t2) : void
+>f10 : (x_0: number, x_1: string, ...x_2: boolean[]) => void
+>42 : 42
+>...t2 : string | boolean
+>t2 : [string, ...boolean[]]
+
+f10(42, "hello", ...t3);
+>f10(42, "hello", ...t3) : void
+>f10 : (x_0: number, x_1: string, ...x_2: boolean[]) => void
+>42 : 42
+>"hello" : "hello"
+>...t3 : boolean
+>t3 : boolean[]
+
+f10(42, "hello", true, ...t4);
+>f10(42, "hello", true, ...t4) : void
+>f10 : (x_0: number, x_1: string, ...x_2: boolean[]) => void
+>42 : 42
+>"hello" : "hello"
+>true : true
+>...t4 : never
+>t4 : []
+
+f10(42, "hello", true, ...t4, false, ...t3);
+>f10(42, "hello", true, ...t4, false, ...t3) : void
+>f10 : (x_0: number, x_1: string, ...x_2: boolean[]) => void
+>42 : 42
+>"hello" : "hello"
+>true : true
+>...t4 : never
+>t4 : []
+>false : false
+>...t3 : boolean
+>t3 : boolean[]
+
+f11(42, "hello");
+>f11(42, "hello") : void
+>f11 : (a: number, x_0: string, ...x_1: boolean[]) => void
+>42 : 42
+>"hello" : "hello"
+
+f11(42, "hello", true);
+>f11(42, "hello", true) : void
+>f11 : (a: number, x_0: string, ...x_1: boolean[]) => void
+>42 : 42
+>"hello" : "hello"
+>true : true
+
+f11(42, "hello", true, false);
+>f11(42, "hello", true, false) : void
+>f11 : (a: number, x_0: string, ...x_1: boolean[]) => void
+>42 : 42
+>"hello" : "hello"
+>true : true
+>false : false
+
+f11(t1[0], t1[1], t1[2], t1[3]);
+>f11(t1[0], t1[1], t1[2], t1[3]) : void
+>f11 : (a: number, x_0: string, ...x_1: boolean[]) => void
+>t1[0] : number
+>t1 : [number, string, ...boolean[]]
+>0 : 0
+>t1[1] : string
+>t1 : [number, string, ...boolean[]]
+>1 : 1
+>t1[2] : boolean
+>t1 : [number, string, ...boolean[]]
+>2 : 2
+>t1[3] : boolean
+>t1 : [number, string, ...boolean[]]
+>3 : 3
+
+f11(...t1);
+>f11(...t1) : void
+>f11 : (a: number, x_0: string, ...x_1: boolean[]) => void
+>...t1 : string | number | boolean
+>t1 : [number, string, ...boolean[]]
+
+f11(42, ...t2);
+>f11(42, ...t2) : void
+>f11 : (a: number, x_0: string, ...x_1: boolean[]) => void
+>42 : 42
+>...t2 : string | boolean
+>t2 : [string, ...boolean[]]
+
+f11(42, "hello", ...t3);
+>f11(42, "hello", ...t3) : void
+>f11 : (a: number, x_0: string, ...x_1: boolean[]) => void
+>42 : 42
+>"hello" : "hello"
+>...t3 : boolean
+>t3 : boolean[]
+
+f11(42, "hello", true, ...t4);
+>f11(42, "hello", true, ...t4) : void
+>f11 : (a: number, x_0: string, ...x_1: boolean[]) => void
+>42 : 42
+>"hello" : "hello"
+>true : true
+>...t4 : never
+>t4 : []
+
+f11(42, "hello", true, ...t4, false, ...t3);
+>f11(42, "hello", true, ...t4, false, ...t3) : void
+>f11 : (a: number, x_0: string, ...x_1: boolean[]) => void
+>42 : 42
+>"hello" : "hello"
+>true : true
+>...t4 : never
+>t4 : []
+>false : false
+>...t3 : boolean
+>t3 : boolean[]
+
+f12(42, "hello");
+>f12(42, "hello") : void
+>f12 : (a: number, b: string, ...x: boolean[]) => void
+>42 : 42
+>"hello" : "hello"
+
+f12(42, "hello", true);
+>f12(42, "hello", true) : void
+>f12 : (a: number, b: string, ...x: boolean[]) => void
+>42 : 42
+>"hello" : "hello"
+>true : true
+
+f12(42, "hello", true, false);
+>f12(42, "hello", true, false) : void
+>f12 : (a: number, b: string, ...x: boolean[]) => void
+>42 : 42
+>"hello" : "hello"
+>true : true
+>false : false
+
+f12(t1[0], t1[1], t1[2], t1[3]);
+>f12(t1[0], t1[1], t1[2], t1[3]) : void
+>f12 : (a: number, b: string, ...x: boolean[]) => void
+>t1[0] : number
+>t1 : [number, string, ...boolean[]]
+>0 : 0
+>t1[1] : string
+>t1 : [number, string, ...boolean[]]
+>1 : 1
+>t1[2] : boolean
+>t1 : [number, string, ...boolean[]]
+>2 : 2
+>t1[3] : boolean
+>t1 : [number, string, ...boolean[]]
+>3 : 3
+
+f12(...t1);
+>f12(...t1) : void
+>f12 : (a: number, b: string, ...x: boolean[]) => void
+>...t1 : string | number | boolean
+>t1 : [number, string, ...boolean[]]
+
+f12(42, ...t2);
+>f12(42, ...t2) : void
+>f12 : (a: number, b: string, ...x: boolean[]) => void
+>42 : 42
+>...t2 : string | boolean
+>t2 : [string, ...boolean[]]
+
+f12(42, "hello", ...t3);
+>f12(42, "hello", ...t3) : void
+>f12 : (a: number, b: string, ...x: boolean[]) => void
+>42 : 42
+>"hello" : "hello"
+>...t3 : boolean
+>t3 : boolean[]
+
+f12(42, "hello", true, ...t4);
+>f12(42, "hello", true, ...t4) : void
+>f12 : (a: number, b: string, ...x: boolean[]) => void
+>42 : 42
+>"hello" : "hello"
+>true : true
+>...t4 : never
+>t4 : []
+
+f12(42, "hello", true, ...t4, false, ...t3);
+>f12(42, "hello", true, ...t4, false, ...t3) : void
+>f12 : (a: number, b: string, ...x: boolean[]) => void
+>42 : 42
+>"hello" : "hello"
+>true : true
+>...t4 : never
+>t4 : []
+>false : false
+>...t3 : boolean
+>t3 : boolean[]
+
+f13(42, "hello");
+>f13(42, "hello") : void
+>f13 : (a: number, b: string, ...c: boolean[]) => void
+>42 : 42
+>"hello" : "hello"
+
+f13(42, "hello", true);
+>f13(42, "hello", true) : void
+>f13 : (a: number, b: string, ...c: boolean[]) => void
+>42 : 42
+>"hello" : "hello"
+>true : true
+
+f13(42, "hello", true, false);
+>f13(42, "hello", true, false) : void
+>f13 : (a: number, b: string, ...c: boolean[]) => void
+>42 : 42
+>"hello" : "hello"
+>true : true
+>false : false
+
+f13(t1[0], t1[1], t1[2], t1[3]);
+>f13(t1[0], t1[1], t1[2], t1[3]) : void
+>f13 : (a: number, b: string, ...c: boolean[]) => void
+>t1[0] : number
+>t1 : [number, string, ...boolean[]]
+>0 : 0
+>t1[1] : string
+>t1 : [number, string, ...boolean[]]
+>1 : 1
+>t1[2] : boolean
+>t1 : [number, string, ...boolean[]]
+>2 : 2
+>t1[3] : boolean
+>t1 : [number, string, ...boolean[]]
+>3 : 3
+
+f13(...t1);
+>f13(...t1) : void
+>f13 : (a: number, b: string, ...c: boolean[]) => void
+>...t1 : string | number | boolean
+>t1 : [number, string, ...boolean[]]
+
+f13(42, ...t2);
+>f13(42, ...t2) : void
+>f13 : (a: number, b: string, ...c: boolean[]) => void
+>42 : 42
+>...t2 : string | boolean
+>t2 : [string, ...boolean[]]
+
+f13(42, "hello", ...t3);
+>f13(42, "hello", ...t3) : void
+>f13 : (a: number, b: string, ...c: boolean[]) => void
+>42 : 42
+>"hello" : "hello"
+>...t3 : boolean
+>t3 : boolean[]
+
+f13(42, "hello", true, ...t4);
+>f13(42, "hello", true, ...t4) : void
+>f13 : (a: number, b: string, ...c: boolean[]) => void
+>42 : 42
+>"hello" : "hello"
+>true : true
+>...t4 : never
+>t4 : []
+
+f13(42, "hello", true, ...t4, false, ...t3);
+>f13(42, "hello", true, ...t4, false, ...t3) : void
+>f13 : (a: number, b: string, ...c: boolean[]) => void
+>42 : 42
+>"hello" : "hello"
+>true : true
+>...t4 : never
+>t4 : []
+>false : false
+>...t3 : boolean
+>t3 : boolean[]
+
+declare const f20: <T extends unknown[]>(...args: T) => T;
+>f20 : <T extends unknown[]>(...args: T) => T
+>T : T
+>args : T
+>T : T
+>T : T
+
+f20(...t1);
+>f20(...t1) : [number, string, ...boolean[]]
+>f20 : <T extends unknown[]>(...args: T) => T
+>...t1 : string | number | boolean
+>t1 : [number, string, ...boolean[]]
+
+f20(42, ...t2);
+>f20(42, ...t2) : [number, string, ...boolean[]]
+>f20 : <T extends unknown[]>(...args: T) => T
+>42 : 42
+>...t2 : string | boolean
+>t2 : [string, ...boolean[]]
+
+f20(42, "hello", ...t3);
+>f20(42, "hello", ...t3) : [number, string, ...boolean[]]
+>f20 : <T extends unknown[]>(...args: T) => T
+>42 : 42
+>"hello" : "hello"
+>...t3 : boolean
+>t3 : boolean[]
+
+f20(42, "hello", ...t2, true);
+>f20(42, "hello", ...t2, true) : [number, string, ...(string | boolean)[]]
+>f20 : <T extends unknown[]>(...args: T) => T
+>42 : 42
+>"hello" : "hello"
+>...t2 : string | boolean
+>t2 : [string, ...boolean[]]
+>true : true
+
+type Parameters<T extends Function> = T extends ((...args: infer U) => any) | (new(...args: infer U) => any) ? U : any[];
+>Parameters : Parameters<T>
+>T : T
+>Function : Function
+>T : T
+>args : U
+>U : U
+>args : U
+>U : U
+>U : U
+
+type T01 = Parameters<(x: number, y: string, ...z: boolean[]) => void>;
+>T01 : [number, string, ...boolean[]]
+>Parameters : Parameters<T>
+>x : number
+>y : string
+>z : boolean[]
+
+type T02 = Parameters<(...args: [number, string, ...boolean[]]) => void>;
+>T02 : [number, string, ...boolean[]]
+>Parameters : Parameters<T>
+>args : [number, string, ...boolean[]]
+
+type T03 = Parameters<new (x: number, y: string, ...z: boolean[]) => void>;
+>T03 : [number, string, ...boolean[]]
+>Parameters : Parameters<T>
+>x : number
+>y : string
+>z : boolean[]
+
+type T04 = Parameters<new (...args: [number, string, ...boolean[]]) => void>;
+>T04 : [number, string, ...boolean[]]
+>Parameters : Parameters<T>
+>args : [number, string, ...boolean[]]
+
+type T05<T extends any[]> = Parameters<(x: string, ...args: T) => void>;
+>T05 : Parameters<(x: string, ...args: T) => void>
+>T : T
+>Parameters : Parameters<T>
+>x : string
+>args : T
+>T : T
+
+type T06 = T05<[number, ...boolean[]]>;
+>T06 : [string, number, ...boolean[]]
+>T05 : Parameters<(x: string, ...args: T) => void>
+
+type P1<T extends Function> = T extends (head: infer A, ...tail: infer B) => any ? { head: A, tail: B } : any[];
+>P1 : P1<T>
+>T : T
+>Function : Function
+>T : T
+>head : A
+>A : A
+>tail : B
+>B : B
+>head : A
+>A : A
+>tail : B
+>B : B
+
+type T10 = P1<(x: number, y: string, ...z: boolean[]) => void>;
+>T10 : { head: number; tail: [string, ...boolean[]]; }
+>P1 : P1<T>
+>x : number
+>y : string
+>z : boolean[]
+
+type T11 = P1<(...z: number[]) => void>;
+>T11 : { head: number; tail: number[]; }
+>P1 : P1<T>
+>z : number[]
+
+type T12 = P1<(x: number, y: number) => void>;
+>T12 : { head: number; tail: [number]; }
+>P1 : P1<T>
+>x : number
+>y : number
+
diff --git a/tests/baselines/reference/optionalTupleElements1.errors.txt b/tests/baselines/reference/optionalTupleElements1.errors.txt
index e6d7b332c18f3..ac9f5f244da2d 100644
--- a/tests/baselines/reference/optionalTupleElements1.errors.txt
+++ b/tests/baselines/reference/optionalTupleElements1.errors.txt
@@ -1,48 +1,31 @@
-tests/cases/conformance/types/tuple/optionalTupleElements1.ts(13,5): error TS2322: Type '[number, string, (boolean | undefined)?]' is not assignable to type '[number, string, boolean]'.
+tests/cases/conformance/types/tuple/optionalTupleElements1.ts(11,29): error TS1257: A required element cannot follow an optional element.
+tests/cases/conformance/types/tuple/optionalTupleElements1.ts(15,5): error TS2322: Type '[number, string, (boolean | undefined)?]' is not assignable to type '[number, string, boolean]'.
   Types of property '2' are incompatible.
     Type 'boolean | undefined' is not assignable to type 'boolean'.
       Type 'undefined' is not assignable to type 'boolean'.
-tests/cases/conformance/types/tuple/optionalTupleElements1.ts(14,5): error TS2322: Type '[number, (string | undefined)?, (boolean | undefined)?]' is not assignable to type '[number, string, boolean]'.
+tests/cases/conformance/types/tuple/optionalTupleElements1.ts(16,5): error TS2322: Type '[number, (string | undefined)?, (boolean | undefined)?]' is not assignable to type '[number, string, boolean]'.
   Types of property '1' are incompatible.
     Type 'string | undefined' is not assignable to type 'string'.
       Type 'undefined' is not assignable to type 'string'.
-tests/cases/conformance/types/tuple/optionalTupleElements1.ts(15,5): error TS2322: Type '[(number | undefined)?, (string | undefined)?, (boolean | undefined)?]' is not assignable to type '[number, string, boolean]'.
+tests/cases/conformance/types/tuple/optionalTupleElements1.ts(17,5): error TS2322: Type '[(number | undefined)?, (string | undefined)?, (boolean | undefined)?]' is not assignable to type '[number, string, boolean]'.
   Types of property '0' are incompatible.
     Type 'number | undefined' is not assignable to type 'number'.
       Type 'undefined' is not assignable to type 'number'.
-tests/cases/conformance/types/tuple/optionalTupleElements1.ts(18,5): error TS2322: Type '[number, (string | undefined)?, (boolean | undefined)?]' is not assignable to type '[number, string, (boolean | undefined)?]'.
+tests/cases/conformance/types/tuple/optionalTupleElements1.ts(20,5): error TS2322: Type '[number, (string | undefined)?, (boolean | undefined)?]' is not assignable to type '[number, string, (boolean | undefined)?]'.
   Types of property '1' are incompatible.
     Type 'string | undefined' is not assignable to type 'string'.
       Type 'undefined' is not assignable to type 'string'.
-tests/cases/conformance/types/tuple/optionalTupleElements1.ts(19,5): error TS2322: Type '[(number | undefined)?, (string | undefined)?, (boolean | undefined)?]' is not assignable to type '[number, string, (boolean | undefined)?]'.
+tests/cases/conformance/types/tuple/optionalTupleElements1.ts(21,5): error TS2322: Type '[(number | undefined)?, (string | undefined)?, (boolean | undefined)?]' is not assignable to type '[number, string, (boolean | undefined)?]'.
   Types of property '0' are incompatible.
     Type 'number | undefined' is not assignable to type 'number'.
       Type 'undefined' is not assignable to type 'number'.
-tests/cases/conformance/types/tuple/optionalTupleElements1.ts(23,5): error TS2322: Type '[(number | undefined)?, (string | undefined)?, (boolean | undefined)?]' is not assignable to type '[number, (string | undefined)?, (boolean | undefined)?]'.
-  Types of property '0' are incompatible.
-    Type 'number | undefined' is not assignable to type 'number'.
-      Type 'undefined' is not assignable to type 'number'.
-tests/cases/conformance/types/tuple/optionalTupleElements1.ts(30,29): error TS1257: A required element cannot follow an optional element.
-tests/cases/conformance/types/tuple/optionalTupleElements1.ts(34,5): error TS2322: Type '[number, string | undefined, boolean]' is not assignable to type '[number, string, boolean]'.
-  Type 'string | undefined' is not assignable to type 'string'.
-    Type 'undefined' is not assignable to type 'string'.
-tests/cases/conformance/types/tuple/optionalTupleElements1.ts(35,5): error TS2322: Type '[number, string | undefined, boolean]' is not assignable to type '[number, string, (boolean | undefined)?]'.
-  Types of property '1' are incompatible.
-    Type 'string | undefined' is not assignable to type 'string'.
-      Type 'undefined' is not assignable to type 'string'.
-tests/cases/conformance/types/tuple/optionalTupleElements1.ts(40,5): error TS2322: Type '[number, string, (boolean | undefined)?]' is not assignable to type '[number, string | undefined, boolean]'.
-  Types of property '2' are incompatible.
-    Type 'boolean | undefined' is not assignable to type 'boolean'.
-      Type 'undefined' is not assignable to type 'boolean'.
-tests/cases/conformance/types/tuple/optionalTupleElements1.ts(41,5): error TS2322: Type '[number, (string | undefined)?, (boolean | undefined)?]' is not assignable to type '[number, string | undefined, boolean]'.
-  Property '1' is optional in type '[number, (string | undefined)?, (boolean | undefined)?]' but required in type '[number, string | undefined, boolean]'.
-tests/cases/conformance/types/tuple/optionalTupleElements1.ts(42,5): error TS2322: Type '[(number | undefined)?, (string | undefined)?, (boolean | undefined)?]' is not assignable to type '[number, string | undefined, boolean]'.
+tests/cases/conformance/types/tuple/optionalTupleElements1.ts(25,5): error TS2322: Type '[(number | undefined)?, (string | undefined)?, (boolean | undefined)?]' is not assignable to type '[number, (string | undefined)?, (boolean | undefined)?]'.
   Types of property '0' are incompatible.
     Type 'number | undefined' is not assignable to type 'number'.
       Type 'undefined' is not assignable to type 'number'.
 
 
-==== tests/cases/conformance/types/tuple/optionalTupleElements1.ts (12 errors) ====
+==== tests/cases/conformance/types/tuple/optionalTupleElements1.ts (7 errors) ====
     type T1 = [number, string, boolean];
     type T2 = [number, string, boolean?];
     type T3 = [number, string?, boolean?];
@@ -53,6 +36,10 @@ tests/cases/conformance/types/tuple/optionalTupleElements1.ts(42,5): error TS232
     type L3 = T3["length"];
     type L4 = T4["length"];
     
+    type T5 = [number, string?, boolean];  // Error
+                                ~~~~~~~
+!!! error TS1257: A required element cannot follow an optional element.
+    
     function f1(t1: T1, t2: T2, t3: T3, t4: T4) {
         t1 = t1;
         t1 = t2;  // Error
@@ -102,50 +89,9 @@ tests/cases/conformance/types/tuple/optionalTupleElements1.ts(42,5): error TS232
         t4 = t4;
     }
     
-    type T5 = [number, string?, boolean];
-                                ~~~~~~~
-!!! error TS1257: A required element cannot follow an optional element.
-    type L5 = T5["length"];
-    
-    function f2(t1: T1, t2: T2, t3: T3, t4: T4, t5: T5) {
-        t1 = t5;  // Error
-        ~~
-!!! error TS2322: Type '[number, string | undefined, boolean]' is not assignable to type '[number, string, boolean]'.
-!!! error TS2322:   Type 'string | undefined' is not assignable to type 'string'.
-!!! error TS2322:     Type 'undefined' is not assignable to type 'string'.
-        t2 = t5;  // Error
-        ~~
-!!! error TS2322: Type '[number, string | undefined, boolean]' is not assignable to type '[number, string, (boolean | undefined)?]'.
-!!! error TS2322:   Types of property '1' are incompatible.
-!!! error TS2322:     Type 'string | undefined' is not assignable to type 'string'.
-!!! error TS2322:       Type 'undefined' is not assignable to type 'string'.
-        t3 = t5;
-        t4 = t5;
-        t5 = t5;
-        t5 = t1;
-        t5 = t2;  // Error
-        ~~
-!!! error TS2322: Type '[number, string, (boolean | undefined)?]' is not assignable to type '[number, string | undefined, boolean]'.
-!!! error TS2322:   Types of property '2' are incompatible.
-!!! error TS2322:     Type 'boolean | undefined' is not assignable to type 'boolean'.
-!!! error TS2322:       Type 'undefined' is not assignable to type 'boolean'.
-        t5 = t3;  // Error
-        ~~
-!!! error TS2322: Type '[number, (string | undefined)?, (boolean | undefined)?]' is not assignable to type '[number, string | undefined, boolean]'.
-!!! error TS2322:   Property '1' is optional in type '[number, (string | undefined)?, (boolean | undefined)?]' but required in type '[number, string | undefined, boolean]'.
-        t5 = t4;  // Error
-        ~~
-!!! error TS2322: Type '[(number | undefined)?, (string | undefined)?, (boolean | undefined)?]' is not assignable to type '[number, string | undefined, boolean]'.
-!!! error TS2322:   Types of property '0' are incompatible.
-!!! error TS2322:     Type 'number | undefined' is not assignable to type 'number'.
-!!! error TS2322:       Type 'undefined' is not assignable to type 'number'.
-        t5 = t5;
-    }
-    
     let t2: T2;
     let t3: T3;
     let t4: T4;
-    let t5: T5;
     
     t2 = [42, "hello"];
     t3 = [42, "hello"];
@@ -156,5 +102,4 @@ tests/cases/conformance/types/tuple/optionalTupleElements1.ts(42,5): error TS232
     t4 = [,"hello", true];
     t4 = [,,true];
     t4 = [];
-    t5 = [42,,true];
     
\ No newline at end of file
diff --git a/tests/baselines/reference/optionalTupleElements1.js b/tests/baselines/reference/optionalTupleElements1.js
index 118b3fb1845bd..73d3f616aa7c4 100644
--- a/tests/baselines/reference/optionalTupleElements1.js
+++ b/tests/baselines/reference/optionalTupleElements1.js
@@ -9,6 +9,8 @@ type L2 = T2["length"];
 type L3 = T3["length"];
 type L4 = T4["length"];
 
+type T5 = [number, string?, boolean];  // Error
+
 function f1(t1: T1, t2: T2, t3: T3, t4: T4) {
     t1 = t1;
     t1 = t2;  // Error
@@ -28,26 +30,9 @@ function f1(t1: T1, t2: T2, t3: T3, t4: T4) {
     t4 = t4;
 }
 
-type T5 = [number, string?, boolean];
-type L5 = T5["length"];
-
-function f2(t1: T1, t2: T2, t3: T3, t4: T4, t5: T5) {
-    t1 = t5;  // Error
-    t2 = t5;  // Error
-    t3 = t5;
-    t4 = t5;
-    t5 = t5;
-    t5 = t1;
-    t5 = t2;  // Error
-    t5 = t3;  // Error
-    t5 = t4;  // Error
-    t5 = t5;
-}
-
 let t2: T2;
 let t3: T3;
 let t4: T4;
-let t5: T5;
 
 t2 = [42, "hello"];
 t3 = [42, "hello"];
@@ -58,7 +43,6 @@ t4 = [42,,true];
 t4 = [,"hello", true];
 t4 = [,,true];
 t4 = [];
-t5 = [42,,true];
 
 
 //// [optionalTupleElements1.js]
@@ -81,22 +65,9 @@ function f1(t1, t2, t3, t4) {
     t4 = t3;
     t4 = t4;
 }
-function f2(t1, t2, t3, t4, t5) {
-    t1 = t5; // Error
-    t2 = t5; // Error
-    t3 = t5;
-    t4 = t5;
-    t5 = t5;
-    t5 = t1;
-    t5 = t2; // Error
-    t5 = t3; // Error
-    t5 = t4; // Error
-    t5 = t5;
-}
 var t2;
 var t3;
 var t4;
-var t5;
 t2 = [42, "hello"];
 t3 = [42, "hello"];
 t3 = [42, , true];
@@ -106,7 +77,6 @@ t4 = [42, , true];
 t4 = [, "hello", true];
 t4 = [, , true];
 t4 = [];
-t5 = [42, , true];
 
 
 //// [optionalTupleElements1.d.ts]
@@ -118,11 +88,8 @@ declare type L1 = T1["length"];
 declare type L2 = T2["length"];
 declare type L3 = T3["length"];
 declare type L4 = T4["length"];
-declare function f1(t1: T1, t2: T2, t3: T3, t4: T4): void;
 declare type T5 = [number, string?, boolean];
-declare type L5 = T5["length"];
-declare function f2(t1: T1, t2: T2, t3: T3, t4: T4, t5: T5): void;
+declare function f1(t1: T1, t2: T2, t3: T3, t4: T4): void;
 declare let t2: T2;
 declare let t3: T3;
 declare let t4: T4;
-declare let t5: T5;
diff --git a/tests/baselines/reference/optionalTupleElements1.symbols b/tests/baselines/reference/optionalTupleElements1.symbols
index 8148ccffef9e6..e70d69b768a3f 100644
--- a/tests/baselines/reference/optionalTupleElements1.symbols
+++ b/tests/baselines/reference/optionalTupleElements1.symbols
@@ -27,186 +27,121 @@ type L4 = T4["length"];
 >L4 : Symbol(L4, Decl(optionalTupleElements1.ts, 7, 23))
 >T4 : Symbol(T4, Decl(optionalTupleElements1.ts, 2, 38))
 
+type T5 = [number, string?, boolean];  // Error
+>T5 : Symbol(T5, Decl(optionalTupleElements1.ts, 8, 23))
+
 function f1(t1: T1, t2: T2, t3: T3, t4: T4) {
->f1 : Symbol(f1, Decl(optionalTupleElements1.ts, 8, 23))
->t1 : Symbol(t1, Decl(optionalTupleElements1.ts, 10, 12))
+>f1 : Symbol(f1, Decl(optionalTupleElements1.ts, 10, 37))
+>t1 : Symbol(t1, Decl(optionalTupleElements1.ts, 12, 12))
 >T1 : Symbol(T1, Decl(optionalTupleElements1.ts, 0, 0))
->t2 : Symbol(t2, Decl(optionalTupleElements1.ts, 10, 19))
+>t2 : Symbol(t2, Decl(optionalTupleElements1.ts, 12, 19))
 >T2 : Symbol(T2, Decl(optionalTupleElements1.ts, 0, 36))
->t3 : Symbol(t3, Decl(optionalTupleElements1.ts, 10, 27))
+>t3 : Symbol(t3, Decl(optionalTupleElements1.ts, 12, 27))
 >T3 : Symbol(T3, Decl(optionalTupleElements1.ts, 1, 37))
->t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 10, 35))
+>t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 12, 35))
 >T4 : Symbol(T4, Decl(optionalTupleElements1.ts, 2, 38))
 
     t1 = t1;
->t1 : Symbol(t1, Decl(optionalTupleElements1.ts, 10, 12))
->t1 : Symbol(t1, Decl(optionalTupleElements1.ts, 10, 12))
+>t1 : Symbol(t1, Decl(optionalTupleElements1.ts, 12, 12))
+>t1 : Symbol(t1, Decl(optionalTupleElements1.ts, 12, 12))
 
     t1 = t2;  // Error
->t1 : Symbol(t1, Decl(optionalTupleElements1.ts, 10, 12))
->t2 : Symbol(t2, Decl(optionalTupleElements1.ts, 10, 19))
+>t1 : Symbol(t1, Decl(optionalTupleElements1.ts, 12, 12))
+>t2 : Symbol(t2, Decl(optionalTupleElements1.ts, 12, 19))
 
     t1 = t3;  // Error
->t1 : Symbol(t1, Decl(optionalTupleElements1.ts, 10, 12))
->t3 : Symbol(t3, Decl(optionalTupleElements1.ts, 10, 27))
+>t1 : Symbol(t1, Decl(optionalTupleElements1.ts, 12, 12))
+>t3 : Symbol(t3, Decl(optionalTupleElements1.ts, 12, 27))
 
     t1 = t4;  // Error
->t1 : Symbol(t1, Decl(optionalTupleElements1.ts, 10, 12))
->t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 10, 35))
+>t1 : Symbol(t1, Decl(optionalTupleElements1.ts, 12, 12))
+>t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 12, 35))
 
     t2 = t1;
->t2 : Symbol(t2, Decl(optionalTupleElements1.ts, 10, 19))
->t1 : Symbol(t1, Decl(optionalTupleElements1.ts, 10, 12))
+>t2 : Symbol(t2, Decl(optionalTupleElements1.ts, 12, 19))
+>t1 : Symbol(t1, Decl(optionalTupleElements1.ts, 12, 12))
 
     t2 = t2;
->t2 : Symbol(t2, Decl(optionalTupleElements1.ts, 10, 19))
->t2 : Symbol(t2, Decl(optionalTupleElements1.ts, 10, 19))
+>t2 : Symbol(t2, Decl(optionalTupleElements1.ts, 12, 19))
+>t2 : Symbol(t2, Decl(optionalTupleElements1.ts, 12, 19))
 
     t2 = t3;  // Error
->t2 : Symbol(t2, Decl(optionalTupleElements1.ts, 10, 19))
->t3 : Symbol(t3, Decl(optionalTupleElements1.ts, 10, 27))
+>t2 : Symbol(t2, Decl(optionalTupleElements1.ts, 12, 19))
+>t3 : Symbol(t3, Decl(optionalTupleElements1.ts, 12, 27))
 
     t2 = t4;  // Error
->t2 : Symbol(t2, Decl(optionalTupleElements1.ts, 10, 19))
->t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 10, 35))
+>t2 : Symbol(t2, Decl(optionalTupleElements1.ts, 12, 19))
+>t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 12, 35))
 
     t3 = t1;
->t3 : Symbol(t3, Decl(optionalTupleElements1.ts, 10, 27))
->t1 : Symbol(t1, Decl(optionalTupleElements1.ts, 10, 12))
+>t3 : Symbol(t3, Decl(optionalTupleElements1.ts, 12, 27))
+>t1 : Symbol(t1, Decl(optionalTupleElements1.ts, 12, 12))
 
     t3 = t2;
->t3 : Symbol(t3, Decl(optionalTupleElements1.ts, 10, 27))
->t2 : Symbol(t2, Decl(optionalTupleElements1.ts, 10, 19))
+>t3 : Symbol(t3, Decl(optionalTupleElements1.ts, 12, 27))
+>t2 : Symbol(t2, Decl(optionalTupleElements1.ts, 12, 19))
 
     t3 = t3;
->t3 : Symbol(t3, Decl(optionalTupleElements1.ts, 10, 27))
->t3 : Symbol(t3, Decl(optionalTupleElements1.ts, 10, 27))
+>t3 : Symbol(t3, Decl(optionalTupleElements1.ts, 12, 27))
+>t3 : Symbol(t3, Decl(optionalTupleElements1.ts, 12, 27))
 
     t3 = t4;  // Error
->t3 : Symbol(t3, Decl(optionalTupleElements1.ts, 10, 27))
->t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 10, 35))
+>t3 : Symbol(t3, Decl(optionalTupleElements1.ts, 12, 27))
+>t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 12, 35))
 
     t4 = t1;
->t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 10, 35))
->t1 : Symbol(t1, Decl(optionalTupleElements1.ts, 10, 12))
+>t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 12, 35))
+>t1 : Symbol(t1, Decl(optionalTupleElements1.ts, 12, 12))
 
     t4 = t2;
->t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 10, 35))
->t2 : Symbol(t2, Decl(optionalTupleElements1.ts, 10, 19))
+>t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 12, 35))
+>t2 : Symbol(t2, Decl(optionalTupleElements1.ts, 12, 19))
 
     t4 = t3;
->t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 10, 35))
->t3 : Symbol(t3, Decl(optionalTupleElements1.ts, 10, 27))
+>t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 12, 35))
+>t3 : Symbol(t3, Decl(optionalTupleElements1.ts, 12, 27))
 
     t4 = t4;
->t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 10, 35))
->t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 10, 35))
-}
-
-type T5 = [number, string?, boolean];
->T5 : Symbol(T5, Decl(optionalTupleElements1.ts, 27, 1))
-
-type L5 = T5["length"];
->L5 : Symbol(L5, Decl(optionalTupleElements1.ts, 29, 37))
->T5 : Symbol(T5, Decl(optionalTupleElements1.ts, 27, 1))
-
-function f2(t1: T1, t2: T2, t3: T3, t4: T4, t5: T5) {
->f2 : Symbol(f2, Decl(optionalTupleElements1.ts, 30, 23))
->t1 : Symbol(t1, Decl(optionalTupleElements1.ts, 32, 12))
->T1 : Symbol(T1, Decl(optionalTupleElements1.ts, 0, 0))
->t2 : Symbol(t2, Decl(optionalTupleElements1.ts, 32, 19))
->T2 : Symbol(T2, Decl(optionalTupleElements1.ts, 0, 36))
->t3 : Symbol(t3, Decl(optionalTupleElements1.ts, 32, 27))
->T3 : Symbol(T3, Decl(optionalTupleElements1.ts, 1, 37))
->t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 32, 35))
->T4 : Symbol(T4, Decl(optionalTupleElements1.ts, 2, 38))
->t5 : Symbol(t5, Decl(optionalTupleElements1.ts, 32, 43))
->T5 : Symbol(T5, Decl(optionalTupleElements1.ts, 27, 1))
-
-    t1 = t5;  // Error
->t1 : Symbol(t1, Decl(optionalTupleElements1.ts, 32, 12))
->t5 : Symbol(t5, Decl(optionalTupleElements1.ts, 32, 43))
-
-    t2 = t5;  // Error
->t2 : Symbol(t2, Decl(optionalTupleElements1.ts, 32, 19))
->t5 : Symbol(t5, Decl(optionalTupleElements1.ts, 32, 43))
-
-    t3 = t5;
->t3 : Symbol(t3, Decl(optionalTupleElements1.ts, 32, 27))
->t5 : Symbol(t5, Decl(optionalTupleElements1.ts, 32, 43))
-
-    t4 = t5;
->t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 32, 35))
->t5 : Symbol(t5, Decl(optionalTupleElements1.ts, 32, 43))
-
-    t5 = t5;
->t5 : Symbol(t5, Decl(optionalTupleElements1.ts, 32, 43))
->t5 : Symbol(t5, Decl(optionalTupleElements1.ts, 32, 43))
-
-    t5 = t1;
->t5 : Symbol(t5, Decl(optionalTupleElements1.ts, 32, 43))
->t1 : Symbol(t1, Decl(optionalTupleElements1.ts, 32, 12))
-
-    t5 = t2;  // Error
->t5 : Symbol(t5, Decl(optionalTupleElements1.ts, 32, 43))
->t2 : Symbol(t2, Decl(optionalTupleElements1.ts, 32, 19))
-
-    t5 = t3;  // Error
->t5 : Symbol(t5, Decl(optionalTupleElements1.ts, 32, 43))
->t3 : Symbol(t3, Decl(optionalTupleElements1.ts, 32, 27))
-
-    t5 = t4;  // Error
->t5 : Symbol(t5, Decl(optionalTupleElements1.ts, 32, 43))
->t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 32, 35))
-
-    t5 = t5;
->t5 : Symbol(t5, Decl(optionalTupleElements1.ts, 32, 43))
->t5 : Symbol(t5, Decl(optionalTupleElements1.ts, 32, 43))
+>t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 12, 35))
+>t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 12, 35))
 }
 
 let t2: T2;
->t2 : Symbol(t2, Decl(optionalTupleElements1.ts, 45, 3))
+>t2 : Symbol(t2, Decl(optionalTupleElements1.ts, 31, 3))
 >T2 : Symbol(T2, Decl(optionalTupleElements1.ts, 0, 36))
 
 let t3: T3;
->t3 : Symbol(t3, Decl(optionalTupleElements1.ts, 46, 3))
+>t3 : Symbol(t3, Decl(optionalTupleElements1.ts, 32, 3))
 >T3 : Symbol(T3, Decl(optionalTupleElements1.ts, 1, 37))
 
 let t4: T4;
->t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 47, 3))
+>t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 33, 3))
 >T4 : Symbol(T4, Decl(optionalTupleElements1.ts, 2, 38))
 
-let t5: T5;
->t5 : Symbol(t5, Decl(optionalTupleElements1.ts, 48, 3))
->T5 : Symbol(T5, Decl(optionalTupleElements1.ts, 27, 1))
-
 t2 = [42, "hello"];
->t2 : Symbol(t2, Decl(optionalTupleElements1.ts, 45, 3))
+>t2 : Symbol(t2, Decl(optionalTupleElements1.ts, 31, 3))
 
 t3 = [42, "hello"];
->t3 : Symbol(t3, Decl(optionalTupleElements1.ts, 46, 3))
+>t3 : Symbol(t3, Decl(optionalTupleElements1.ts, 32, 3))
 
 t3 = [42,,true]
->t3 : Symbol(t3, Decl(optionalTupleElements1.ts, 46, 3))
+>t3 : Symbol(t3, Decl(optionalTupleElements1.ts, 32, 3))
 
 t3 = [42];
->t3 : Symbol(t3, Decl(optionalTupleElements1.ts, 46, 3))
+>t3 : Symbol(t3, Decl(optionalTupleElements1.ts, 32, 3))
 
 t4 = [42, "hello"];
->t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 47, 3))
+>t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 33, 3))
 
 t4 = [42,,true];
->t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 47, 3))
+>t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 33, 3))
 
 t4 = [,"hello", true];
->t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 47, 3))
+>t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 33, 3))
 
 t4 = [,,true];
->t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 47, 3))
+>t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 33, 3))
 
 t4 = [];
->t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 47, 3))
-
-t5 = [42,,true];
->t5 : Symbol(t5, Decl(optionalTupleElements1.ts, 48, 3))
+>t4 : Symbol(t4, Decl(optionalTupleElements1.ts, 33, 3))
 
diff --git a/tests/baselines/reference/optionalTupleElements1.types b/tests/baselines/reference/optionalTupleElements1.types
index 5cbe036b052c4..fa09afab3f0dc 100644
--- a/tests/baselines/reference/optionalTupleElements1.types
+++ b/tests/baselines/reference/optionalTupleElements1.types
@@ -27,6 +27,9 @@ type L4 = T4["length"];
 >L4 : 0 | 3 | 2 | 1
 >T4 : [(number | undefined)?, (string | undefined)?, (boolean | undefined)?]
 
+type T5 = [number, string?, boolean];  // Error
+>T5 : [number, string | undefined, boolean]
+
 function f1(t1: T1, t2: T2, t3: T3, t4: T4) {
 >f1 : (t1: [number, string, boolean], t2: [number, string, (boolean | undefined)?], t3: [number, (string | undefined)?, (boolean | undefined)?], t4: [(number | undefined)?, (string | undefined)?, (boolean | undefined)?]) => void
 >t1 : [number, string, boolean]
@@ -119,77 +122,6 @@ function f1(t1: T1, t2: T2, t3: T3, t4: T4) {
 >t4 : [(number | undefined)?, (string | undefined)?, (boolean | undefined)?]
 }
 
-type T5 = [number, string?, boolean];
->T5 : [number, string | undefined, boolean]
-
-type L5 = T5["length"];
->L5 : 3
->T5 : [number, string | undefined, boolean]
-
-function f2(t1: T1, t2: T2, t3: T3, t4: T4, t5: T5) {
->f2 : (t1: [number, string, boolean], t2: [number, string, (boolean | undefined)?], t3: [number, (string | undefined)?, (boolean | undefined)?], t4: [(number | undefined)?, (string | undefined)?, (boolean | undefined)?], t5: [number, string | undefined, boolean]) => void
->t1 : [number, string, boolean]
->T1 : [number, string, boolean]
->t2 : [number, string, (boolean | undefined)?]
->T2 : [number, string, (boolean | undefined)?]
->t3 : [number, (string | undefined)?, (boolean | undefined)?]
->T3 : [number, (string | undefined)?, (boolean | undefined)?]
->t4 : [(number | undefined)?, (string | undefined)?, (boolean | undefined)?]
->T4 : [(number | undefined)?, (string | undefined)?, (boolean | undefined)?]
->t5 : [number, string | undefined, boolean]
->T5 : [number, string | undefined, boolean]
-
-    t1 = t5;  // Error
->t1 = t5 : [number, string | undefined, boolean]
->t1 : [number, string, boolean]
->t5 : [number, string | undefined, boolean]
-
-    t2 = t5;  // Error
->t2 = t5 : [number, string | undefined, boolean]
->t2 : [number, string, (boolean | undefined)?]
->t5 : [number, string | undefined, boolean]
-
-    t3 = t5;
->t3 = t5 : [number, string | undefined, boolean]
->t3 : [number, (string | undefined)?, (boolean | undefined)?]
->t5 : [number, string | undefined, boolean]
-
-    t4 = t5;
->t4 = t5 : [number, string | undefined, boolean]
->t4 : [(number | undefined)?, (string | undefined)?, (boolean | undefined)?]
->t5 : [number, string | undefined, boolean]
-
-    t5 = t5;
->t5 = t5 : [number, string | undefined, boolean]
->t5 : [number, string | undefined, boolean]
->t5 : [number, string | undefined, boolean]
-
-    t5 = t1;
->t5 = t1 : [number, string, boolean]
->t5 : [number, string | undefined, boolean]
->t1 : [number, string, boolean]
-
-    t5 = t2;  // Error
->t5 = t2 : [number, string, (boolean | undefined)?]
->t5 : [number, string | undefined, boolean]
->t2 : [number, string, (boolean | undefined)?]
-
-    t5 = t3;  // Error
->t5 = t3 : [number, (string | undefined)?, (boolean | undefined)?]
->t5 : [number, string | undefined, boolean]
->t3 : [number, (string | undefined)?, (boolean | undefined)?]
-
-    t5 = t4;  // Error
->t5 = t4 : [(number | undefined)?, (string | undefined)?, (boolean | undefined)?]
->t5 : [number, string | undefined, boolean]
->t4 : [(number | undefined)?, (string | undefined)?, (boolean | undefined)?]
-
-    t5 = t5;
->t5 = t5 : [number, string | undefined, boolean]
->t5 : [number, string | undefined, boolean]
->t5 : [number, string | undefined, boolean]
-}
-
 let t2: T2;
 >t2 : [number, string, (boolean | undefined)?]
 >T2 : [number, string, (boolean | undefined)?]
@@ -202,10 +134,6 @@ let t4: T4;
 >t4 : [(number | undefined)?, (string | undefined)?, (boolean | undefined)?]
 >T4 : [(number | undefined)?, (string | undefined)?, (boolean | undefined)?]
 
-let t5: T5;
->t5 : [number, string | undefined, boolean]
->T5 : [number, string | undefined, boolean]
-
 t2 = [42, "hello"];
 >t2 = [42, "hello"] : [number, string]
 >t2 : [number, string, (boolean | undefined)?]
@@ -270,11 +198,3 @@ t4 = [];
 >t4 : [(number | undefined)?, (string | undefined)?, (boolean | undefined)?]
 >[] : []
 
-t5 = [42,,true];
->t5 = [42,,true] : [number, undefined, true]
->t5 : [number, string | undefined, boolean]
->[42,,true] : [number, undefined, true]
->42 : 42
-> : undefined
->true : true
-
diff --git a/tests/baselines/reference/restTupleElements1.errors.txt b/tests/baselines/reference/restTupleElements1.errors.txt
new file mode 100644
index 0000000000000..dbabfbe640e24
--- /dev/null
+++ b/tests/baselines/reference/restTupleElements1.errors.txt
@@ -0,0 +1,138 @@
+tests/cases/conformance/types/tuple/restTupleElements1.ts(3,22): error TS1257: A required element cannot follow an optional element.
+tests/cases/conformance/types/tuple/restTupleElements1.ts(8,13): error TS1256: A rest element must be last in a tuple type.
+tests/cases/conformance/types/tuple/restTupleElements1.ts(9,13): error TS2574: A rest element type must be an array type.
+tests/cases/conformance/types/tuple/restTupleElements1.ts(10,13): error TS2574: A rest element type must be an array type.
+tests/cases/conformance/types/tuple/restTupleElements1.ts(10,16): error TS8020: JSDoc types can only be used inside documentation comments.
+tests/cases/conformance/types/tuple/restTupleElements1.ts(23,31): error TS2344: Type 'number[]' does not satisfy the constraint '[number, ...number[]]'.
+  Property '0' is missing in type 'number[]'.
+tests/cases/conformance/types/tuple/restTupleElements1.ts(24,31): error TS2344: Type '[]' does not satisfy the constraint '[number, ...number[]]'.
+  Property '0' is missing in type '[]'.
+tests/cases/conformance/types/tuple/restTupleElements1.ts(29,18): error TS2344: Type 'number[]' does not satisfy the constraint '[number]'.
+  Property '0' is missing in type 'number[]'.
+tests/cases/conformance/types/tuple/restTupleElements1.ts(30,18): error TS2344: Type '[number, ...number[]]' does not satisfy the constraint '[number]'.
+  Types of property 'length' are incompatible.
+    Type 'number' is not assignable to type '1'.
+tests/cases/conformance/types/tuple/restTupleElements1.ts(32,31): error TS2344: Type '[number, ...string[]]' does not satisfy the constraint '[number, ...number[]]'.
+  Type 'string' is not assignable to type 'number'.
+tests/cases/conformance/types/tuple/restTupleElements1.ts(33,31): error TS2344: Type '[string, ...number[]]' does not satisfy the constraint '[number, ...number[]]'.
+  Type 'string' is not assignable to type 'number'.
+tests/cases/conformance/types/tuple/restTupleElements1.ts(34,31): error TS2344: Type '[number, number, string]' does not satisfy the constraint '[number, ...number[]]'.
+  Property '2' is incompatible with rest element type.
+    Type 'string' is not assignable to type 'number'.
+tests/cases/conformance/types/tuple/restTupleElements1.ts(35,31): error TS2344: Type '[number, number, number, string]' does not satisfy the constraint '[number, ...number[]]'.
+  Property '3' is incompatible with rest element type.
+    Type 'string' is not assignable to type 'number'.
+tests/cases/conformance/types/tuple/restTupleElements1.ts(59,4): error TS2345: Argument of type '[]' is not assignable to parameter of type '[{}, ...{}[]]'.
+  Property '0' is missing in type '[]'.
+
+
+==== tests/cases/conformance/types/tuple/restTupleElements1.ts (14 errors) ====
+    type T00 = [string?];
+    type T01 = [string, string?];
+    type T02 = [string?, string];  // Error
+                         ~~~~~~
+!!! error TS1257: A required element cannot follow an optional element.
+    type T03 = [...string[]];
+    type T04 = [...[...string[]]];
+    type T05 = [...[...[...string[]]]];
+    type T06 = [string, ...string[]];
+    type T07 = [...string[], string];  // Error
+                ~~~~~~~~~~~
+!!! error TS1256: A rest element must be last in a tuple type.
+    type T08 = [...string];  // Error
+                ~~~~~~~~~
+!!! error TS2574: A rest element type must be an array type.
+    type T09 = [...string?];  // Error
+                ~~~~~~~~~~
+!!! error TS2574: A rest element type must be an array type.
+                   ~~~~~~~
+!!! error TS8020: JSDoc types can only be used inside documentation comments.
+    type T10 = [string, ...[...string[]]];
+    type T11 = [string, ...[...[...string[]]]];
+    
+    type T15 = [boolean, number, ...string[]];
+    type L15 = T15["length"];  // number
+    
+    declare function assign<T, S extends T>(): void;
+    
+    assign<number[], [...number[]]>();
+    assign<number[], [number, ...number[]]>();
+    assign<[...number[]], number[]>();
+    
+    assign<[number, ...number[]], number[]>();  // Error
+                                  ~~~~~~~~
+!!! error TS2344: Type 'number[]' does not satisfy the constraint '[number, ...number[]]'.
+!!! error TS2344:   Property '0' is missing in type 'number[]'.
+    assign<[number, ...number[]], []>();  // Error
+                                  ~~
+!!! error TS2344: Type '[]' does not satisfy the constraint '[number, ...number[]]'.
+!!! error TS2344:   Property '0' is missing in type '[]'.
+    assign<[number, ...number[]], [number]>();
+    assign<[number, ...number[]], [number, number]>();
+    assign<[number, ...number[]], [number, number, ...number[]]>();
+    
+    assign<[number], [...number[]]>();  // Error
+                     ~~~~~~~~~~~~~
+!!! error TS2344: Type 'number[]' does not satisfy the constraint '[number]'.
+!!! error TS2344:   Property '0' is missing in type 'number[]'.
+    assign<[number], [number, ...number[]]>();  // Error
+                     ~~~~~~~~~~~~~~~~~~~~~
+!!! error TS2344: Type '[number, ...number[]]' does not satisfy the constraint '[number]'.
+!!! error TS2344:   Types of property 'length' are incompatible.
+!!! error TS2344:     Type 'number' is not assignable to type '1'.
+    
+    assign<[number, ...number[]], [number, ...string[]]>();  // Error
+                                  ~~~~~~~~~~~~~~~~~~~~~
+!!! error TS2344: Type '[number, ...string[]]' does not satisfy the constraint '[number, ...number[]]'.
+!!! error TS2344:   Type 'string' is not assignable to type 'number'.
+    assign<[number, ...number[]], [string, ...number[]]>();  // Error
+                                  ~~~~~~~~~~~~~~~~~~~~~
+!!! error TS2344: Type '[string, ...number[]]' does not satisfy the constraint '[number, ...number[]]'.
+!!! error TS2344:   Type 'string' is not assignable to type 'number'.
+    assign<[number, ...number[]], [number, number, string]>();  // Error
+                                  ~~~~~~~~~~~~~~~~~~~~~~~~
+!!! error TS2344: Type '[number, number, string]' does not satisfy the constraint '[number, ...number[]]'.
+!!! error TS2344:   Property '2' is incompatible with rest element type.
+!!! error TS2344:     Type 'string' is not assignable to type 'number'.
+    assign<[number, ...number[]], [number, number, number, string]>();  // Error
+                                  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+!!! error TS2344: Type '[number, number, number, string]' does not satisfy the constraint '[number, ...number[]]'.
+!!! error TS2344:   Property '3' is incompatible with rest element type.
+!!! error TS2344:     Type 'string' is not assignable to type 'number'.
+    
+    type T20 = [number, string, ...boolean[]];
+    
+    type T21 = T20[0];
+    type T22 = T20[0 | 1];
+    type T23 = T20[0 | 1 | 2];
+    type T24 = T20[0 | 1 | 2 | 3];
+    type T25 = T20[1 | 2 | 3];
+    type T26 = T20[2 | 3];
+    type T27 = T20[3];
+    type T28 = T20[number];
+    
+    declare const t: T20;
+    declare const x: number;
+    
+    let e0 = t[0];  // number
+    let e1 = t[1];  // string
+    let e2 = t[2];  // boolean
+    let e3 = t[3];  // boolean
+    let ex = t[x];  // number | string | boolean
+    
+    declare function f0<T, U>(x: [T, ...U[]]): [T, U];
+    
+    f0([]);  // Error
+       ~~
+!!! error TS2345: Argument of type '[]' is not assignable to parameter of type '[{}, ...{}[]]'.
+!!! error TS2345:   Property '0' is missing in type '[]'.
+    f0([1]);
+    f0([1, 2, 3]);
+    f0([1, "hello", true]);
+    
+    declare function f1(a: [(x: number) => number, ...((x: string) => number)[]]): void;
+    declare function f2(...a: [(x: number) => number, ...((x: string) => number)[]]): void;
+    
+    f1([x => x * 2, x => x.length, x => x.charCodeAt(0)]);
+    f2(x => x * 2, x => x.length, x => x.charCodeAt(0));
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/restTupleElements1.js b/tests/baselines/reference/restTupleElements1.js
new file mode 100644
index 0000000000000..a15c7fd4dd119
--- /dev/null
+++ b/tests/baselines/reference/restTupleElements1.js
@@ -0,0 +1,135 @@
+//// [restTupleElements1.ts]
+type T00 = [string?];
+type T01 = [string, string?];
+type T02 = [string?, string];  // Error
+type T03 = [...string[]];
+type T04 = [...[...string[]]];
+type T05 = [...[...[...string[]]]];
+type T06 = [string, ...string[]];
+type T07 = [...string[], string];  // Error
+type T08 = [...string];  // Error
+type T09 = [...string?];  // Error
+type T10 = [string, ...[...string[]]];
+type T11 = [string, ...[...[...string[]]]];
+
+type T15 = [boolean, number, ...string[]];
+type L15 = T15["length"];  // number
+
+declare function assign<T, S extends T>(): void;
+
+assign<number[], [...number[]]>();
+assign<number[], [number, ...number[]]>();
+assign<[...number[]], number[]>();
+
+assign<[number, ...number[]], number[]>();  // Error
+assign<[number, ...number[]], []>();  // Error
+assign<[number, ...number[]], [number]>();
+assign<[number, ...number[]], [number, number]>();
+assign<[number, ...number[]], [number, number, ...number[]]>();
+
+assign<[number], [...number[]]>();  // Error
+assign<[number], [number, ...number[]]>();  // Error
+
+assign<[number, ...number[]], [number, ...string[]]>();  // Error
+assign<[number, ...number[]], [string, ...number[]]>();  // Error
+assign<[number, ...number[]], [number, number, string]>();  // Error
+assign<[number, ...number[]], [number, number, number, string]>();  // Error
+
+type T20 = [number, string, ...boolean[]];
+
+type T21 = T20[0];
+type T22 = T20[0 | 1];
+type T23 = T20[0 | 1 | 2];
+type T24 = T20[0 | 1 | 2 | 3];
+type T25 = T20[1 | 2 | 3];
+type T26 = T20[2 | 3];
+type T27 = T20[3];
+type T28 = T20[number];
+
+declare const t: T20;
+declare const x: number;
+
+let e0 = t[0];  // number
+let e1 = t[1];  // string
+let e2 = t[2];  // boolean
+let e3 = t[3];  // boolean
+let ex = t[x];  // number | string | boolean
+
+declare function f0<T, U>(x: [T, ...U[]]): [T, U];
+
+f0([]);  // Error
+f0([1]);
+f0([1, 2, 3]);
+f0([1, "hello", true]);
+
+declare function f1(a: [(x: number) => number, ...((x: string) => number)[]]): void;
+declare function f2(...a: [(x: number) => number, ...((x: string) => number)[]]): void;
+
+f1([x => x * 2, x => x.length, x => x.charCodeAt(0)]);
+f2(x => x * 2, x => x.length, x => x.charCodeAt(0));
+
+
+//// [restTupleElements1.js]
+"use strict";
+assign();
+assign();
+assign();
+assign(); // Error
+assign(); // Error
+assign();
+assign();
+assign();
+assign(); // Error
+assign(); // Error
+assign(); // Error
+assign(); // Error
+assign(); // Error
+assign(); // Error
+var e0 = t[0]; // number
+var e1 = t[1]; // string
+var e2 = t[2]; // boolean
+var e3 = t[3]; // boolean
+var ex = t[x]; // number | string | boolean
+f0([]); // Error
+f0([1]);
+f0([1, 2, 3]);
+f0([1, "hello", true]);
+f1([function (x) { return x * 2; }, function (x) { return x.length; }, function (x) { return x.charCodeAt(0); }]);
+f2(function (x) { return x * 2; }, function (x) { return x.length; }, function (x) { return x.charCodeAt(0); });
+
+
+//// [restTupleElements1.d.ts]
+declare type T00 = [string?];
+declare type T01 = [string, string?];
+declare type T02 = [string?, string];
+declare type T03 = [...string[]];
+declare type T04 = [...[...string[]]];
+declare type T05 = [...[...[...string[]]]];
+declare type T06 = [string, ...string[]];
+declare type T07 = [...string[], string];
+declare type T08 = [...string];
+declare type T09 = [...?string];
+declare type T10 = [string, ...[...string[]]];
+declare type T11 = [string, ...[...[...string[]]]];
+declare type T15 = [boolean, number, ...string[]];
+declare type L15 = T15["length"];
+declare function assign<T, S extends T>(): void;
+declare type T20 = [number, string, ...boolean[]];
+declare type T21 = T20[0];
+declare type T22 = T20[0 | 1];
+declare type T23 = T20[0 | 1 | 2];
+declare type T24 = T20[0 | 1 | 2 | 3];
+declare type T25 = T20[1 | 2 | 3];
+declare type T26 = T20[2 | 3];
+declare type T27 = T20[3];
+declare type T28 = T20[number];
+declare const t: T20;
+declare const x: number;
+declare let e0: number;
+declare let e1: string;
+declare let e2: boolean;
+declare let e3: boolean;
+declare let ex: string | number | boolean;
+declare function f0<T, U>(x: [T, ...U[]]): [T, U];
+declare function f1(a: [(x: number) => number, ...((x: string) => number)[]]): void;
+declare function f2(...a: [(x: number) => number, ...((x: string) => number)[]]): void;
diff --git a/tests/baselines/reference/restTupleElements1.symbols b/tests/baselines/reference/restTupleElements1.symbols
new file mode 100644
index 0000000000000..5880ffbc92c5e
--- /dev/null
+++ b/tests/baselines/reference/restTupleElements1.symbols
@@ -0,0 +1,217 @@
+=== tests/cases/conformance/types/tuple/restTupleElements1.ts ===
+type T00 = [string?];
+>T00 : Symbol(T00, Decl(restTupleElements1.ts, 0, 0))
+
+type T01 = [string, string?];
+>T01 : Symbol(T01, Decl(restTupleElements1.ts, 0, 21))
+
+type T02 = [string?, string];  // Error
+>T02 : Symbol(T02, Decl(restTupleElements1.ts, 1, 29))
+
+type T03 = [...string[]];
+>T03 : Symbol(T03, Decl(restTupleElements1.ts, 2, 29))
+
+type T04 = [...[...string[]]];
+>T04 : Symbol(T04, Decl(restTupleElements1.ts, 3, 25))
+
+type T05 = [...[...[...string[]]]];
+>T05 : Symbol(T05, Decl(restTupleElements1.ts, 4, 30))
+
+type T06 = [string, ...string[]];
+>T06 : Symbol(T06, Decl(restTupleElements1.ts, 5, 35))
+
+type T07 = [...string[], string];  // Error
+>T07 : Symbol(T07, Decl(restTupleElements1.ts, 6, 33))
+
+type T08 = [...string];  // Error
+>T08 : Symbol(T08, Decl(restTupleElements1.ts, 7, 33))
+
+type T09 = [...string?];  // Error
+>T09 : Symbol(T09, Decl(restTupleElements1.ts, 8, 23))
+
+type T10 = [string, ...[...string[]]];
+>T10 : Symbol(T10, Decl(restTupleElements1.ts, 9, 24))
+
+type T11 = [string, ...[...[...string[]]]];
+>T11 : Symbol(T11, Decl(restTupleElements1.ts, 10, 38))
+
+type T15 = [boolean, number, ...string[]];
+>T15 : Symbol(T15, Decl(restTupleElements1.ts, 11, 43))
+
+type L15 = T15["length"];  // number
+>L15 : Symbol(L15, Decl(restTupleElements1.ts, 13, 42))
+>T15 : Symbol(T15, Decl(restTupleElements1.ts, 11, 43))
+
+declare function assign<T, S extends T>(): void;
+>assign : Symbol(assign, Decl(restTupleElements1.ts, 14, 25))
+>T : Symbol(T, Decl(restTupleElements1.ts, 16, 24))
+>S : Symbol(S, Decl(restTupleElements1.ts, 16, 26))
+>T : Symbol(T, Decl(restTupleElements1.ts, 16, 24))
+
+assign<number[], [...number[]]>();
+>assign : Symbol(assign, Decl(restTupleElements1.ts, 14, 25))
+
+assign<number[], [number, ...number[]]>();
+>assign : Symbol(assign, Decl(restTupleElements1.ts, 14, 25))
+
+assign<[...number[]], number[]>();
+>assign : Symbol(assign, Decl(restTupleElements1.ts, 14, 25))
+
+assign<[number, ...number[]], number[]>();  // Error
+>assign : Symbol(assign, Decl(restTupleElements1.ts, 14, 25))
+
+assign<[number, ...number[]], []>();  // Error
+>assign : Symbol(assign, Decl(restTupleElements1.ts, 14, 25))
+
+assign<[number, ...number[]], [number]>();
+>assign : Symbol(assign, Decl(restTupleElements1.ts, 14, 25))
+
+assign<[number, ...number[]], [number, number]>();
+>assign : Symbol(assign, Decl(restTupleElements1.ts, 14, 25))
+
+assign<[number, ...number[]], [number, number, ...number[]]>();
+>assign : Symbol(assign, Decl(restTupleElements1.ts, 14, 25))
+
+assign<[number], [...number[]]>();  // Error
+>assign : Symbol(assign, Decl(restTupleElements1.ts, 14, 25))
+
+assign<[number], [number, ...number[]]>();  // Error
+>assign : Symbol(assign, Decl(restTupleElements1.ts, 14, 25))
+
+assign<[number, ...number[]], [number, ...string[]]>();  // Error
+>assign : Symbol(assign, Decl(restTupleElements1.ts, 14, 25))
+
+assign<[number, ...number[]], [string, ...number[]]>();  // Error
+>assign : Symbol(assign, Decl(restTupleElements1.ts, 14, 25))
+
+assign<[number, ...number[]], [number, number, string]>();  // Error
+>assign : Symbol(assign, Decl(restTupleElements1.ts, 14, 25))
+
+assign<[number, ...number[]], [number, number, number, string]>();  // Error
+>assign : Symbol(assign, Decl(restTupleElements1.ts, 14, 25))
+
+type T20 = [number, string, ...boolean[]];
+>T20 : Symbol(T20, Decl(restTupleElements1.ts, 34, 66))
+
+type T21 = T20[0];
+>T21 : Symbol(T21, Decl(restTupleElements1.ts, 36, 42))
+>T20 : Symbol(T20, Decl(restTupleElements1.ts, 34, 66))
+
+type T22 = T20[0 | 1];
+>T22 : Symbol(T22, Decl(restTupleElements1.ts, 38, 18))
+>T20 : Symbol(T20, Decl(restTupleElements1.ts, 34, 66))
+
+type T23 = T20[0 | 1 | 2];
+>T23 : Symbol(T23, Decl(restTupleElements1.ts, 39, 22))
+>T20 : Symbol(T20, Decl(restTupleElements1.ts, 34, 66))
+
+type T24 = T20[0 | 1 | 2 | 3];
+>T24 : Symbol(T24, Decl(restTupleElements1.ts, 40, 26))
+>T20 : Symbol(T20, Decl(restTupleElements1.ts, 34, 66))
+
+type T25 = T20[1 | 2 | 3];
+>T25 : Symbol(T25, Decl(restTupleElements1.ts, 41, 30))
+>T20 : Symbol(T20, Decl(restTupleElements1.ts, 34, 66))
+
+type T26 = T20[2 | 3];
+>T26 : Symbol(T26, Decl(restTupleElements1.ts, 42, 26))
+>T20 : Symbol(T20, Decl(restTupleElements1.ts, 34, 66))
+
+type T27 = T20[3];
+>T27 : Symbol(T27, Decl(restTupleElements1.ts, 43, 22))
+>T20 : Symbol(T20, Decl(restTupleElements1.ts, 34, 66))
+
+type T28 = T20[number];
+>T28 : Symbol(T28, Decl(restTupleElements1.ts, 44, 18))
+>T20 : Symbol(T20, Decl(restTupleElements1.ts, 34, 66))
+
+declare const t: T20;
+>t : Symbol(t, Decl(restTupleElements1.ts, 47, 13))
+>T20 : Symbol(T20, Decl(restTupleElements1.ts, 34, 66))
+
+declare const x: number;
+>x : Symbol(x, Decl(restTupleElements1.ts, 48, 13))
+
+let e0 = t[0];  // number
+>e0 : Symbol(e0, Decl(restTupleElements1.ts, 50, 3))
+>t : Symbol(t, Decl(restTupleElements1.ts, 47, 13))
+>0 : Symbol(0)
+
+let e1 = t[1];  // string
+>e1 : Symbol(e1, Decl(restTupleElements1.ts, 51, 3))
+>t : Symbol(t, Decl(restTupleElements1.ts, 47, 13))
+>1 : Symbol(1)
+
+let e2 = t[2];  // boolean
+>e2 : Symbol(e2, Decl(restTupleElements1.ts, 52, 3))
+>t : Symbol(t, Decl(restTupleElements1.ts, 47, 13))
+
+let e3 = t[3];  // boolean
+>e3 : Symbol(e3, Decl(restTupleElements1.ts, 53, 3))
+>t : Symbol(t, Decl(restTupleElements1.ts, 47, 13))
+
+let ex = t[x];  // number | string | boolean
+>ex : Symbol(ex, Decl(restTupleElements1.ts, 54, 3))
+>t : Symbol(t, Decl(restTupleElements1.ts, 47, 13))
+>x : Symbol(x, Decl(restTupleElements1.ts, 48, 13))
+
+declare function f0<T, U>(x: [T, ...U[]]): [T, U];
+>f0 : Symbol(f0, Decl(restTupleElements1.ts, 54, 14))
+>T : Symbol(T, Decl(restTupleElements1.ts, 56, 20))
+>U : Symbol(U, Decl(restTupleElements1.ts, 56, 22))
+>x : Symbol(x, Decl(restTupleElements1.ts, 56, 26))
+>T : Symbol(T, Decl(restTupleElements1.ts, 56, 20))
+>U : Symbol(U, Decl(restTupleElements1.ts, 56, 22))
+>T : Symbol(T, Decl(restTupleElements1.ts, 56, 20))
+>U : Symbol(U, Decl(restTupleElements1.ts, 56, 22))
+
+f0([]);  // Error
+>f0 : Symbol(f0, Decl(restTupleElements1.ts, 54, 14))
+
+f0([1]);
+>f0 : Symbol(f0, Decl(restTupleElements1.ts, 54, 14))
+
+f0([1, 2, 3]);
+>f0 : Symbol(f0, Decl(restTupleElements1.ts, 54, 14))
+
+f0([1, "hello", true]);
+>f0 : Symbol(f0, Decl(restTupleElements1.ts, 54, 14))
+
+declare function f1(a: [(x: number) => number, ...((x: string) => number)[]]): void;
+>f1 : Symbol(f1, Decl(restTupleElements1.ts, 61, 23))
+>a : Symbol(a, Decl(restTupleElements1.ts, 63, 20))
+>x : Symbol(x, Decl(restTupleElements1.ts, 63, 25))
+>x : Symbol(x, Decl(restTupleElements1.ts, 63, 52))
+
+declare function f2(...a: [(x: number) => number, ...((x: string) => number)[]]): void;
+>f2 : Symbol(f2, Decl(restTupleElements1.ts, 63, 84))
+>a : Symbol(a, Decl(restTupleElements1.ts, 64, 20))
+>x : Symbol(x, Decl(restTupleElements1.ts, 64, 28))
+>x : Symbol(x, Decl(restTupleElements1.ts, 64, 55))
+
+f1([x => x * 2, x => x.length, x => x.charCodeAt(0)]);
+>f1 : Symbol(f1, Decl(restTupleElements1.ts, 61, 23))
+>x : Symbol(x, Decl(restTupleElements1.ts, 66, 4))
+>x : Symbol(x, Decl(restTupleElements1.ts, 66, 4))
+>x : Symbol(x, Decl(restTupleElements1.ts, 66, 15))
+>x.length : Symbol(String.length, Decl(lib.es5.d.ts, --, --))
+>x : Symbol(x, Decl(restTupleElements1.ts, 66, 15))
+>length : Symbol(String.length, Decl(lib.es5.d.ts, --, --))
+>x : Symbol(x, Decl(restTupleElements1.ts, 66, 30))
+>x.charCodeAt : Symbol(String.charCodeAt, Decl(lib.es5.d.ts, --, --))
+>x : Symbol(x, Decl(restTupleElements1.ts, 66, 30))
+>charCodeAt : Symbol(String.charCodeAt, Decl(lib.es5.d.ts, --, --))
+
+f2(x => x * 2, x => x.length, x => x.charCodeAt(0));
+>f2 : Symbol(f2, Decl(restTupleElements1.ts, 63, 84))
+>x : Symbol(x, Decl(restTupleElements1.ts, 67, 3))
+>x : Symbol(x, Decl(restTupleElements1.ts, 67, 3))
+>x : Symbol(x, Decl(restTupleElements1.ts, 67, 14))
+>x.length : Symbol(String.length, Decl(lib.es5.d.ts, --, --))
+>x : Symbol(x, Decl(restTupleElements1.ts, 67, 14))
+>length : Symbol(String.length, Decl(lib.es5.d.ts, --, --))
+>x : Symbol(x, Decl(restTupleElements1.ts, 67, 29))
+>x.charCodeAt : Symbol(String.charCodeAt, Decl(lib.es5.d.ts, --, --))
+>x : Symbol(x, Decl(restTupleElements1.ts, 67, 29))
+>charCodeAt : Symbol(String.charCodeAt, Decl(lib.es5.d.ts, --, --))
+
diff --git a/tests/baselines/reference/restTupleElements1.types b/tests/baselines/reference/restTupleElements1.types
new file mode 100644
index 0000000000000..bf749b1474086
--- /dev/null
+++ b/tests/baselines/reference/restTupleElements1.types
@@ -0,0 +1,270 @@
+=== tests/cases/conformance/types/tuple/restTupleElements1.ts ===
+type T00 = [string?];
+>T00 : [(string | undefined)?]
+
+type T01 = [string, string?];
+>T01 : [string, (string | undefined)?]
+
+type T02 = [string?, string];  // Error
+>T02 : [string | undefined, string]
+
+type T03 = [...string[]];
+>T03 : string[]
+
+type T04 = [...[...string[]]];
+>T04 : string[]
+
+type T05 = [...[...[...string[]]]];
+>T05 : string[]
+
+type T06 = [string, ...string[]];
+>T06 : [string, ...string[]]
+
+type T07 = [...string[], string];  // Error
+>T07 : [string[], string]
+
+type T08 = [...string];  // Error
+>T08 : string[]
+
+type T09 = [...string?];  // Error
+>T09 : (string | null)[]
+
+type T10 = [string, ...[...string[]]];
+>T10 : [string, ...string[]]
+
+type T11 = [string, ...[...[...string[]]]];
+>T11 : [string, ...string[]]
+
+type T15 = [boolean, number, ...string[]];
+>T15 : [boolean, number, ...string[]]
+
+type L15 = T15["length"];  // number
+>L15 : number
+>T15 : [boolean, number, ...string[]]
+
+declare function assign<T, S extends T>(): void;
+>assign : <T, S extends T>() => void
+>T : T
+>S : S
+>T : T
+
+assign<number[], [...number[]]>();
+>assign<number[], [...number[]]>() : void
+>assign : <T, S extends T>() => void
+
+assign<number[], [number, ...number[]]>();
+>assign<number[], [number, ...number[]]>() : void
+>assign : <T, S extends T>() => void
+
+assign<[...number[]], number[]>();
+>assign<[...number[]], number[]>() : void
+>assign : <T, S extends T>() => void
+
+assign<[number, ...number[]], number[]>();  // Error
+>assign<[number, ...number[]], number[]>() : any
+>assign : <T, S extends T>() => void
+
+assign<[number, ...number[]], []>();  // Error
+>assign<[number, ...number[]], []>() : any
+>assign : <T, S extends T>() => void
+
+assign<[number, ...number[]], [number]>();
+>assign<[number, ...number[]], [number]>() : void
+>assign : <T, S extends T>() => void
+
+assign<[number, ...number[]], [number, number]>();
+>assign<[number, ...number[]], [number, number]>() : void
+>assign : <T, S extends T>() => void
+
+assign<[number, ...number[]], [number, number, ...number[]]>();
+>assign<[number, ...number[]], [number, number, ...number[]]>() : void
+>assign : <T, S extends T>() => void
+
+assign<[number], [...number[]]>();  // Error
+>assign<[number], [...number[]]>() : any
+>assign : <T, S extends T>() => void
+
+assign<[number], [number, ...number[]]>();  // Error
+>assign<[number], [number, ...number[]]>() : any
+>assign : <T, S extends T>() => void
+
+assign<[number, ...number[]], [number, ...string[]]>();  // Error
+>assign<[number, ...number[]], [number, ...string[]]>() : any
+>assign : <T, S extends T>() => void
+
+assign<[number, ...number[]], [string, ...number[]]>();  // Error
+>assign<[number, ...number[]], [string, ...number[]]>() : any
+>assign : <T, S extends T>() => void
+
+assign<[number, ...number[]], [number, number, string]>();  // Error
+>assign<[number, ...number[]], [number, number, string]>() : any
+>assign : <T, S extends T>() => void
+
+assign<[number, ...number[]], [number, number, number, string]>();  // Error
+>assign<[number, ...number[]], [number, number, number, string]>() : any
+>assign : <T, S extends T>() => void
+
+type T20 = [number, string, ...boolean[]];
+>T20 : [number, string, ...boolean[]]
+
+type T21 = T20[0];
+>T21 : number
+>T20 : [number, string, ...boolean[]]
+
+type T22 = T20[0 | 1];
+>T22 : string | number
+>T20 : [number, string, ...boolean[]]
+
+type T23 = T20[0 | 1 | 2];
+>T23 : string | number | boolean
+>T20 : [number, string, ...boolean[]]
+
+type T24 = T20[0 | 1 | 2 | 3];
+>T24 : string | number | boolean
+>T20 : [number, string, ...boolean[]]
+
+type T25 = T20[1 | 2 | 3];
+>T25 : string | boolean
+>T20 : [number, string, ...boolean[]]
+
+type T26 = T20[2 | 3];
+>T26 : boolean
+>T20 : [number, string, ...boolean[]]
+
+type T27 = T20[3];
+>T27 : boolean
+>T20 : [number, string, ...boolean[]]
+
+type T28 = T20[number];
+>T28 : string | number | boolean
+>T20 : [number, string, ...boolean[]]
+
+declare const t: T20;
+>t : [number, string, ...boolean[]]
+>T20 : [number, string, ...boolean[]]
+
+declare const x: number;
+>x : number
+
+let e0 = t[0];  // number
+>e0 : number
+>t[0] : number
+>t : [number, string, ...boolean[]]
+>0 : 0
+
+let e1 = t[1];  // string
+>e1 : string
+>t[1] : string
+>t : [number, string, ...boolean[]]
+>1 : 1
+
+let e2 = t[2];  // boolean
+>e2 : boolean
+>t[2] : boolean
+>t : [number, string, ...boolean[]]
+>2 : 2
+
+let e3 = t[3];  // boolean
+>e3 : boolean
+>t[3] : boolean
+>t : [number, string, ...boolean[]]
+>3 : 3
+
+let ex = t[x];  // number | string | boolean
+>ex : string | number | boolean
+>t[x] : string | number | boolean
+>t : [number, string, ...boolean[]]
+>x : number
+
+declare function f0<T, U>(x: [T, ...U[]]): [T, U];
+>f0 : <T, U>(x: [T, ...U[]]) => [T, U]
+>T : T
+>U : U
+>x : [T, ...U[]]
+>T : T
+>U : U
+>T : T
+>U : U
+
+f0([]);  // Error
+>f0([]) : any
+>f0 : <T, U>(x: [T, ...U[]]) => [T, U]
+>[] : never[]
+
+f0([1]);
+>f0([1]) : [number, {}]
+>f0 : <T, U>(x: [T, ...U[]]) => [T, U]
+>[1] : [number]
+>1 : 1
+
+f0([1, 2, 3]);
+>f0([1, 2, 3]) : [number, number]
+>f0 : <T, U>(x: [T, ...U[]]) => [T, U]
+>[1, 2, 3] : [number, number, number]
+>1 : 1
+>2 : 2
+>3 : 3
+
+f0([1, "hello", true]);
+>f0([1, "hello", true]) : [number, string | boolean]
+>f0 : <T, U>(x: [T, ...U[]]) => [T, U]
+>[1, "hello", true] : [number, string, true]
+>1 : 1
+>"hello" : "hello"
+>true : true
+
+declare function f1(a: [(x: number) => number, ...((x: string) => number)[]]): void;
+>f1 : (a: [(x: number) => number, ...((x: string) => number)[]]) => void
+>a : [(x: number) => number, ...((x: string) => number)[]]
+>x : number
+>x : string
+
+declare function f2(...a: [(x: number) => number, ...((x: string) => number)[]]): void;
+>f2 : (a_0: (x: number) => number, ...a_1: ((x: string) => number)[]) => void
+>a : [(x: number) => number, ...((x: string) => number)[]]
+>x : number
+>x : string
+
+f1([x => x * 2, x => x.length, x => x.charCodeAt(0)]);
+>f1([x => x * 2, x => x.length, x => x.charCodeAt(0)]) : void
+>f1 : (a: [(x: number) => number, ...((x: string) => number)[]]) => void
+>[x => x * 2, x => x.length, x => x.charCodeAt(0)] : [(x: number) => number, (x: string) => number, (x: string) => number]
+>x => x * 2 : (x: number) => number
+>x : number
+>x * 2 : number
+>x : number
+>2 : 2
+>x => x.length : (x: string) => number
+>x : string
+>x.length : number
+>x : string
+>length : number
+>x => x.charCodeAt(0) : (x: string) => number
+>x : string
+>x.charCodeAt(0) : number
+>x.charCodeAt : (index: number) => number
+>x : string
+>charCodeAt : (index: number) => number
+>0 : 0
+
+f2(x => x * 2, x => x.length, x => x.charCodeAt(0));
+>f2(x => x * 2, x => x.length, x => x.charCodeAt(0)) : void
+>f2 : (a_0: (x: number) => number, ...a_1: ((x: string) => number)[]) => void
+>x => x * 2 : (x: number) => number
+>x : number
+>x * 2 : number
+>x : number
+>2 : 2
+>x => x.length : (x: string) => number
+>x : string
+>x.length : number
+>x : string
+>length : number
+>x => x.charCodeAt(0) : (x: string) => number
+>x : string
+>x.charCodeAt(0) : number
+>x.charCodeAt : (index: number) => number
+>x : string
+>charCodeAt : (index: number) => number
+>0 : 0
+

From 656ccd87e76f0bf7b1fd7b704ece24d305ce3d80 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Mon, 25 Jun 2018 15:58:48 -1000
Subject: [PATCH 37/37] Revert package.json change

---
 package.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/package.json b/package.json
index f2d86e035a585..37e4cc663d6d8 100644
--- a/package.json
+++ b/package.json
@@ -47,7 +47,7 @@
         "@types/minimatch": "latest",
         "@types/minimist": "latest",
         "@types/mkdirp": "latest",
-        "@types/mocha": "^5.2.2",
+        "@types/mocha": "latest",
         "@types/node": "8.5.5",
         "@types/q": "latest",
         "@types/run-sequence": "latest",